1290 files changed, 57366 insertions, 37375 deletions

diff --git a/fs/9p/Kconfig b/fs/9p/Kconfig
index 11045d8e356a..ac2ec4543fe1 100644
--- a/fs/9p/Kconfig
+++ b/fs/9p/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config 9P_FS
 	tristate "Plan 9 Resource Sharing Support (9P2000)"
 	depends on INET && NET_9P
diff --git a/fs/9p/cache.c b/fs/9p/cache.c
index 9eb34701a566..995e332eee5c 100644
--- a/fs/9p/cache.c
+++ b/fs/9p/cache.c
@@ -1,23 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * V9FS cache definitions.
  *
  *  Copyright (C) 2009 by Abhishek Kulkarni <adkulkar@umail.iu.edu>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #include <linux/jiffies.h>
diff --git a/fs/9p/cache.h b/fs/9p/cache.h
index 247e47e54bcc..00f107af443e 100644
--- a/fs/9p/cache.h
+++ b/fs/9p/cache.h
@@ -1,23 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * V9FS cache definitions.
  *
  *  Copyright (C) 2009 by Abhishek Kulkarni <adkulkar@umail.iu.edu>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #ifndef _9P_CACHE_H
diff --git a/fs/9p/fid.c b/fs/9p/fid.c
index a9ef46f02354..3d681a2c2731 100644
--- a/fs/9p/fid.c
+++ b/fs/9p/fid.c
@@ -1,24 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * V9FS FID Management
  *
  *  Copyright (C) 2007 by Latchesar Ionkov <lucho@ionkov.net>
  *  Copyright (C) 2005, 2006 by Eric Van Hensbergen <ericvh@gmail.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #include <linux/module.h>
diff --git a/fs/9p/fid.h b/fs/9p/fid.h
index 4491bcaf42b8..928b1093f511 100644
--- a/fs/9p/fid.h
+++ b/fs/9p/fid.h
@@ -1,23 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * V9FS FID Management
  *
  *  Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 #ifndef FS_9P_FID_H
 #define FS_9P_FID_H
diff --git a/fs/9p/v9fs.c b/fs/9p/v9fs.c
index 619128b55837..15a99f9c7253 100644
--- a/fs/9p/v9fs.c
+++ b/fs/9p/v9fs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/9p/v9fs.c
  *
@@ -5,22 +6,6 @@
  *
  *  Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/fs/9p/v9fs.h b/fs/9p/v9fs.h
index 129e5243a6bf..7b763776306e 100644
--- a/fs/9p/v9fs.h
+++ b/fs/9p/v9fs.h
@@ -1,24 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * V9FS definitions.
  *
  *  Copyright (C) 2004-2008 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 #ifndef FS_9P_V9FS_H
 #define FS_9P_V9FS_H
diff --git a/fs/9p/v9fs_vfs.h b/fs/9p/v9fs_vfs.h
index 5a0db6dec8d1..fd2a2b040250 100644
--- a/fs/9p/v9fs_vfs.h
+++ b/fs/9p/v9fs_vfs.h
@@ -1,24 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * V9FS VFS extensions.
  *
  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 #ifndef FS_9P_V9FS_VFS_H
 #define FS_9P_V9FS_VFS_H
@@ -40,6 +25,9 @@
  */
 #define P9_LOCK_TIMEOUT (30*HZ)
 
+/* flags for v9fs_stat2inode() & v9fs_stat2inode_dotl() */
+#define V9FS_STAT2INODE_KEEP_ISIZE 1
+
 extern struct file_system_type v9fs_fs_type;
 extern const struct address_space_operations v9fs_addr_operations;
 extern const struct file_operations v9fs_file_operations;
@@ -55,14 +43,16 @@ extern const struct file_operations v9fs_mmap_file_operations_dotl;
 extern struct kmem_cache *v9fs_inode_cache;
 
 struct inode *v9fs_alloc_inode(struct super_block *sb);
-void v9fs_destroy_inode(struct inode *inode);
+void v9fs_free_inode(struct inode *inode);
 struct inode *v9fs_get_inode(struct super_block *sb, umode_t mode, dev_t);
 int v9fs_init_inode(struct v9fs_session_info *v9ses,
 		    struct inode *inode, umode_t mode, dev_t);
 void v9fs_evict_inode(struct inode *inode);
 ino_t v9fs_qid2ino(struct p9_qid *qid);
-void v9fs_stat2inode(struct p9_wstat *, struct inode *, struct super_block *);
-void v9fs_stat2inode_dotl(struct p9_stat_dotl *, struct inode *);
+void v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
+		      struct super_block *sb, unsigned int flags);
+void v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
+			   unsigned int flags);
 int v9fs_dir_release(struct inode *inode, struct file *filp);
 int v9fs_file_open(struct inode *inode, struct file *file);
 void v9fs_inode2stat(struct inode *inode, struct p9_wstat *stat);
@@ -83,4 +73,18 @@ static inline void v9fs_invalidate_inode_attr(struct inode *inode)
 }
 
 int v9fs_open_to_dotl_flags(int flags);
+
+static inline void v9fs_i_size_write(struct inode *inode, loff_t i_size)
+{
+	/*
+	 * 32-bit need the lock, concurrent updates could break the
+	 * sequences and make i_size_read() loop forever.
+	 * 64-bit updates are atomic and can skip the locking.
+	 */
+	if (sizeof(i_size) > sizeof(long))
+		spin_lock(&inode->i_lock);
+	i_size_write(inode, i_size);
+	if (sizeof(i_size) > sizeof(long))
+		spin_unlock(&inode->i_lock);
+}
 #endif
diff --git a/fs/9p/vfs_addr.c b/fs/9p/vfs_addr.c
index 0bcbcc20f769..cce9ace651a2 100644
--- a/fs/9p/vfs_addr.c
+++ b/fs/9p/vfs_addr.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/9p/vfs_addr.c
  *
@@ -5,22 +6,6 @@
  *
  *  Copyright (C) 2005 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #include <linux/module.h>
@@ -50,8 +35,9 @@
  * @page: structure to page
  *
  */
-static int v9fs_fid_readpage(struct p9_fid *fid, struct page *page)
+static int v9fs_fid_readpage(void *data, struct page *page)
 {
+	struct p9_fid *fid = data;
 	struct inode *inode = page->mapping->host;
 	struct bio_vec bvec = {.bv_page = page, .bv_len = PAGE_SIZE};
 	struct iov_iter to;
@@ -122,7 +108,8 @@ static int v9fs_vfs_readpages(struct file *filp, struct address_space *mapping,
 	if (ret == 0)
 		return ret;
 
-	ret = read_cache_pages(mapping, pages, (void *)v9fs_vfs_readpage, filp);
+	ret = read_cache_pages(mapping, pages, v9fs_fid_readpage,
+			filp->private_data);
 	p9_debug(P9_DEBUG_VFS, "  = %d\n", ret);
 	return ret;
 }
diff --git a/fs/9p/vfs_dentry.c b/fs/9p/vfs_dentry.c
index bd456c668d39..7d6f69aefd45 100644
--- a/fs/9p/vfs_dentry.c
+++ b/fs/9p/vfs_dentry.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/9p/vfs_dentry.c
  *
@@ -5,22 +6,6 @@
  *
  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #include <linux/module.h>
diff --git a/fs/9p/vfs_dir.c b/fs/9p/vfs_dir.c
index 00745147329d..674d22bf4f6f 100644
--- a/fs/9p/vfs_dir.c
+++ b/fs/9p/vfs_dir.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/9p/vfs_dir.c
  *
@@ -5,22 +6,6 @@
  *
  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #include <linux/module.h>
diff --git a/fs/9p/vfs_file.c b/fs/9p/vfs_file.c
index a25efa782fcc..4cc966a31cb3 100644
--- a/fs/9p/vfs_file.c
+++ b/fs/9p/vfs_file.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/9p/vfs_file.c
  *
@@ -5,22 +6,6 @@
  *
  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #include <linux/module.h>
@@ -446,7 +431,11 @@ v9fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 		i_size = i_size_read(inode);
 		if (iocb->ki_pos > i_size) {
 			inode_add_bytes(inode, iocb->ki_pos - i_size);
-			i_size_write(inode, iocb->ki_pos);
+			/*
+			 * Need to serialize against i_size_write() in
+			 * v9fs_stat2inode()
+			 */
+			v9fs_i_size_write(inode, iocb->ki_pos);
 		}
 		return retval;
 	}
diff --git a/fs/9p/vfs_inode.c b/fs/9p/vfs_inode.c
index 85ff859d3af5..b82423a72f68 100644
--- a/fs/9p/vfs_inode.c
+++ b/fs/9p/vfs_inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/9p/vfs_inode.c
  *
@@ -5,22 +6,6 @@
  *
  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -253,21 +238,15 @@ struct inode *v9fs_alloc_inode(struct super_block *sb)
 }
 
 /**
- * v9fs_destroy_inode - destroy an inode
+ * v9fs_free_inode - destroy an inode
  *
  */
 
-static void v9fs_i_callback(struct rcu_head *head)
+void v9fs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(v9fs_inode_cache, V9FS_I(inode));
 }
 
-void v9fs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, v9fs_i_callback);
-}
-
 int v9fs_init_inode(struct v9fs_session_info *v9ses,
 		    struct inode *inode, umode_t mode, dev_t rdev)
 {
@@ -538,7 +517,7 @@ static struct inode *v9fs_qid_iget(struct super_block *sb,
 	if (retval)
 		goto error;
 
-	v9fs_stat2inode(st, inode, sb);
+	v9fs_stat2inode(st, inode, sb, 0);
 	v9fs_cache_inode_get_cookie(inode);
 	unlock_new_inode(inode);
 	return inode;
@@ -1092,7 +1071,7 @@ v9fs_vfs_getattr(const struct path *path, struct kstat *stat,
 	if (IS_ERR(st))
 		return PTR_ERR(st);
 
-	v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb);
+	v9fs_stat2inode(st, d_inode(dentry), dentry->d_sb, 0);
 	generic_fillattr(d_inode(dentry), stat);
 
 	p9stat_free(st);
@@ -1170,12 +1149,13 @@ static int v9fs_vfs_setattr(struct dentry *dentry, struct iattr *iattr)
  * @stat: Plan 9 metadata (mistat) structure
  * @inode: inode to populate
  * @sb: superblock of filesystem
+ * @flags: control flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
  *
  */
 
 void
 v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
-	struct super_block *sb)
+		 struct super_block *sb, unsigned int flags)
 {
 	umode_t mode;
 	char ext[32];
@@ -1216,10 +1196,11 @@ v9fs_stat2inode(struct p9_wstat *stat, struct inode *inode,
 	mode = p9mode2perm(v9ses, stat);
 	mode |= inode->i_mode & ~S_IALLUGO;
 	inode->i_mode = mode;
-	i_size_write(inode, stat->length);
 
+	if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
+		v9fs_i_size_write(inode, stat->length);
 	/* not real number of blocks, but 512 byte ones ... */
-	inode->i_blocks = (i_size_read(inode) + 512 - 1) >> 9;
+	inode->i_blocks = (stat->length + 512 - 1) >> 9;
 	v9inode->cache_validity &= ~V9FS_INO_INVALID_ATTR;
 }
 
@@ -1416,9 +1397,9 @@ int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
 {
 	int umode;
 	dev_t rdev;
-	loff_t i_size;
 	struct p9_wstat *st;
 	struct v9fs_session_info *v9ses;
+	unsigned int flags;
 
 	v9ses = v9fs_inode2v9ses(inode);
 	st = p9_client_stat(fid);
@@ -1431,16 +1412,13 @@ int v9fs_refresh_inode(struct p9_fid *fid, struct inode *inode)
 	if ((inode->i_mode & S_IFMT) != (umode & S_IFMT))
 		goto out;
 
-	spin_lock(&inode->i_lock);
 	/*
 	 * We don't want to refresh inode->i_size,
 	 * because we may have cached data
 	 */
-	i_size = inode->i_size;
-	v9fs_stat2inode(st, inode, inode->i_sb);
-	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
-		inode->i_size = i_size;
-	spin_unlock(&inode->i_lock);
+	flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
+		V9FS_STAT2INODE_KEEP_ISIZE : 0;
+	v9fs_stat2inode(st, inode, inode->i_sb, flags);
 out:
 	p9stat_free(st);
 	kfree(st);
diff --git a/fs/9p/vfs_inode_dotl.c b/fs/9p/vfs_inode_dotl.c
index 4823e1c46999..60328b21c5fb 100644
--- a/fs/9p/vfs_inode_dotl.c
+++ b/fs/9p/vfs_inode_dotl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/9p/vfs_inode_dotl.c
  *
@@ -5,22 +6,6 @@
  *
  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #include <linux/module.h>
@@ -143,7 +128,7 @@ static struct inode *v9fs_qid_iget_dotl(struct super_block *sb,
 	if (retval)
 		goto error;
 
-	v9fs_stat2inode_dotl(st, inode);
+	v9fs_stat2inode_dotl(st, inode, 0);
 	v9fs_cache_inode_get_cookie(inode);
 	retval = v9fs_get_acl(inode, fid);
 	if (retval)
@@ -496,7 +481,7 @@ v9fs_vfs_getattr_dotl(const struct path *path, struct kstat *stat,
 	if (IS_ERR(st))
 		return PTR_ERR(st);
 
-	v9fs_stat2inode_dotl(st, d_inode(dentry));
+	v9fs_stat2inode_dotl(st, d_inode(dentry), 0);
 	generic_fillattr(d_inode(dentry), stat);
 	/* Change block size to what the server returned */
 	stat->blksize = st->st_blksize;
@@ -607,11 +592,13 @@ int v9fs_vfs_setattr_dotl(struct dentry *dentry, struct iattr *iattr)
  * v9fs_stat2inode_dotl - populate an inode structure with stat info
  * @stat: stat structure
  * @inode: inode to populate
+ * @flags: ctrl flags (e.g. V9FS_STAT2INODE_KEEP_ISIZE)
  *
  */
 
 void
-v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
+v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode,
+		      unsigned int flags)
 {
 	umode_t mode;
 	struct v9fs_inode *v9inode = V9FS_I(inode);
@@ -631,7 +618,8 @@ v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
 		mode |= inode->i_mode & ~S_IALLUGO;
 		inode->i_mode = mode;
 
-		i_size_write(inode, stat->st_size);
+		if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE))
+			v9fs_i_size_write(inode, stat->st_size);
 		inode->i_blocks = stat->st_blocks;
 	} else {
 		if (stat->st_result_mask & P9_STATS_ATIME) {
@@ -661,8 +649,9 @@ v9fs_stat2inode_dotl(struct p9_stat_dotl *stat, struct inode *inode)
 		}
 		if (stat->st_result_mask & P9_STATS_RDEV)
 			inode->i_rdev = new_decode_dev(stat->st_rdev);
-		if (stat->st_result_mask & P9_STATS_SIZE)
-			i_size_write(inode, stat->st_size);
+		if (!(flags & V9FS_STAT2INODE_KEEP_ISIZE) &&
+		    stat->st_result_mask & P9_STATS_SIZE)
+			v9fs_i_size_write(inode, stat->st_size);
 		if (stat->st_result_mask & P9_STATS_BLOCKS)
 			inode->i_blocks = stat->st_blocks;
 	}
@@ -928,9 +917,9 @@ v9fs_vfs_get_link_dotl(struct dentry *dentry,
 
 int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
 {
-	loff_t i_size;
 	struct p9_stat_dotl *st;
 	struct v9fs_session_info *v9ses;
+	unsigned int flags;
 
 	v9ses = v9fs_inode2v9ses(inode);
 	st = p9_client_getattr_dotl(fid, P9_STATS_ALL);
@@ -942,16 +931,13 @@ int v9fs_refresh_inode_dotl(struct p9_fid *fid, struct inode *inode)
 	if ((inode->i_mode & S_IFMT) != (st->st_mode & S_IFMT))
 		goto out;
 
-	spin_lock(&inode->i_lock);
 	/*
 	 * We don't want to refresh inode->i_size,
 	 * because we may have cached data
 	 */
-	i_size = inode->i_size;
-	v9fs_stat2inode_dotl(st, inode);
-	if (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE)
-		inode->i_size = i_size;
-	spin_unlock(&inode->i_lock);
+	flags = (v9ses->cache == CACHE_LOOSE || v9ses->cache == CACHE_FSCACHE) ?
+		V9FS_STAT2INODE_KEEP_ISIZE : 0;
+	v9fs_stat2inode_dotl(st, inode, flags);
 out:
 	kfree(st);
 	return 0;
diff --git a/fs/9p/vfs_super.c b/fs/9p/vfs_super.c
index 48ce50484e80..08112fbcaece 100644
--- a/fs/9p/vfs_super.c
+++ b/fs/9p/vfs_super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/9p/vfs_super.c
  *
@@ -6,22 +7,6 @@
  *
  *  Copyright (C) 2004 by Eric Van Hensbergen <ericvh@gmail.com>
  *  Copyright (C) 2002 by Ron Minnich <rminnich@lanl.gov>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #include <linux/kernel.h>
@@ -92,7 +77,7 @@ v9fs_fill_super(struct super_block *sb, struct v9fs_session_info *v9ses,
 		return ret;
 
 	if (v9ses->cache)
-		sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024)/PAGE_SIZE;
+		sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
 
 	sb->s_flags |= SB_ACTIVE | SB_DIRSYNC;
 	if (!v9ses->cache)
@@ -172,7 +157,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
 			goto release_sb;
 		}
 		d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
-		v9fs_stat2inode_dotl(st, d_inode(root));
+		v9fs_stat2inode_dotl(st, d_inode(root), 0);
 		kfree(st);
 	} else {
 		struct p9_wstat *st = NULL;
@@ -183,7 +168,7 @@ static struct dentry *v9fs_mount(struct file_system_type *fs_type, int flags,
 		}
 
 		d_inode(root)->i_ino = v9fs_qid2ino(&st->qid);
-		v9fs_stat2inode(st, d_inode(root), sb);
+		v9fs_stat2inode(st, d_inode(root), sb, 0);
 
 		p9stat_free(st);
 		kfree(st);
@@ -344,7 +329,7 @@ static int v9fs_write_inode_dotl(struct inode *inode,
 
 static const struct super_operations v9fs_super_ops = {
 	.alloc_inode = v9fs_alloc_inode,
-	.destroy_inode = v9fs_destroy_inode,
+	.free_inode = v9fs_free_inode,
 	.statfs = simple_statfs,
 	.evict_inode = v9fs_evict_inode,
 	.show_options = v9fs_show_options,
@@ -354,7 +339,7 @@ static const struct super_operations v9fs_super_ops = {
 
 static const struct super_operations v9fs_super_ops_dotl = {
 	.alloc_inode = v9fs_alloc_inode,
-	.destroy_inode = v9fs_destroy_inode,
+	.free_inode = v9fs_free_inode,
 	.statfs = v9fs_statfs,
 	.drop_inode = v9fs_drop_inode,
 	.evict_inode = v9fs_evict_inode,
diff --git a/fs/Kconfig b/fs/Kconfig
index ac474a61be37..bfb1c6095c7a 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # File system configuration
 #
@@ -8,6 +9,12 @@ menu "File systems"
 config DCACHE_WORD_ACCESS
        bool
 
+config VALIDATE_FS_PARSER
+	bool "Validate filesystem parameter description"
+	help
+	  Enable this to perform validation of the parameter description for a
+	  filesystem when it is registered.
+
 if BLOCK
 
 config FS_IOMAP
@@ -254,12 +261,9 @@ source "fs/romfs/Kconfig"
 source "fs/pstore/Kconfig"
 source "fs/sysv/Kconfig"
 source "fs/ufs/Kconfig"
-source "fs/exofs/Kconfig"
 
 endif # MISC_FILESYSTEMS
 
-source "fs/exofs/Kconfig.ore"
-
 menuconfig NETWORK_FILESYSTEMS
 	bool "Network File Systems"
 	default y
@@ -313,5 +317,6 @@ endif # NETWORK_FILESYSTEMS
 
 source "fs/nls/Kconfig"
 source "fs/dlm/Kconfig"
+source "fs/unicode/Kconfig"
 
 endmenu
diff --git a/fs/Kconfig.binfmt b/fs/Kconfig.binfmt
index b795f8da81f3..62dc4f577ba1 100644
--- a/fs/Kconfig.binfmt
+++ b/fs/Kconfig.binfmt
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 
 menu "Executable file formats"
 
@@ -90,12 +91,28 @@ config BINFMT_SCRIPT
 
 	  Most systems will not boot if you say M or N here.  If unsure, say Y.
 
+config ARCH_HAS_BINFMT_FLAT
+	bool
+
 config BINFMT_FLAT
 	bool "Kernel support for flat binaries"
-	depends on !MMU || ARM || M68K
+	depends on ARCH_HAS_BINFMT_FLAT
 	help
 	  Support uClinux FLAT format binaries.
 
+config BINFMT_FLAT_ARGVP_ENVP_ON_STACK
+	bool
+
+config BINFMT_FLAT_OLD_ALWAYS_RAM
+	bool
+
+config BINFMT_FLAT_OLD
+	bool "Enable support for very old legacy flat binaries"
+	depends on BINFMT_FLAT
+	help
+	  Support decade old uClinux FLAT format binaries.  Unless you know
+	  you have some of those say N here.
+
 config BINFMT_ZFLAT
 	bool "Enable ZFLAT support"
 	depends on BINFMT_FLAT
diff --git a/fs/Makefile b/fs/Makefile
index 293733f61594..c9aea23aba56 100644
--- a/fs/Makefile
+++ b/fs/Makefile
@@ -12,7 +12,8 @@ obj-y :=	open.o read_write.o file_table.o super.o \
 		attr.o bad_inode.o file.o filesystems.o namespace.o \
 		seq_file.o xattr.o libfs.o fs-writeback.o \
 		pnode.o splice.o sync.o utimes.o d_path.o \
-		stack.o fs_struct.o statfs.o fs_pin.o nsfs.o
+		stack.o fs_struct.o statfs.o fs_pin.o nsfs.o \
+		fs_types.o fs_context.o fs_parser.o fsopen.o
 
 ifeq ($(CONFIG_BLOCK),y)
 obj-y +=	buffer.o block_dev.o direct-io.o mpage.o
@@ -24,12 +25,13 @@ obj-$(CONFIG_PROC_FS) += proc_namespace.o
 
 obj-y				+= notify/
 obj-$(CONFIG_EPOLL)		+= eventpoll.o
-obj-$(CONFIG_ANON_INODES)	+= anon_inodes.o
+obj-y				+= anon_inodes.o
 obj-$(CONFIG_SIGNALFD)		+= signalfd.o
 obj-$(CONFIG_TIMERFD)		+= timerfd.o
 obj-$(CONFIG_EVENTFD)		+= eventfd.o
 obj-$(CONFIG_USERFAULTFD)	+= userfaultfd.o
 obj-$(CONFIG_AIO)               += aio.o
+obj-$(CONFIG_IO_URING)		+= io_uring.o
 obj-$(CONFIG_FS_DAX)		+= dax.o
 obj-$(CONFIG_FS_ENCRYPTION)	+= crypto/
 obj-$(CONFIG_FILE_LOCKING)      += locks.o
@@ -90,6 +92,7 @@ obj-$(CONFIG_EXPORTFS)		+= exportfs/
 obj-$(CONFIG_NFSD)		+= nfsd/
 obj-$(CONFIG_LOCKD)		+= lockd/
 obj-$(CONFIG_NLS)		+= nls/
+obj-$(CONFIG_UNICODE)		+= unicode/
 obj-$(CONFIG_SYSV_FS)		+= sysv/
 obj-$(CONFIG_CIFS)		+= cifs/
 obj-$(CONFIG_HPFS_FS)		+= hpfs/
@@ -124,7 +127,6 @@ obj-$(CONFIG_OCFS2_FS)		+= ocfs2/
 obj-$(CONFIG_BTRFS_FS)		+= btrfs/
 obj-$(CONFIG_GFS2_FS)           += gfs2/
 obj-$(CONFIG_F2FS_FS)		+= f2fs/
-obj-y				+= exofs/ # Multiple modules
 obj-$(CONFIG_CEPH_FS)		+= ceph/
 obj-$(CONFIG_PSTORE)		+= pstore/
 obj-$(CONFIG_EFIVAR_FS)		+= efivarfs/
diff --git a/fs/adfs/Kconfig b/fs/adfs/Kconfig
index c5a7787dd5e9..df4650dccf68 100644
--- a/fs/adfs/Kconfig
+++ b/fs/adfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config ADFS_FS
 	tristate "ADFS file system support"
 	depends on BLOCK
diff --git a/fs/adfs/Makefile b/fs/adfs/Makefile
index 9b2d71a9a35c..cf7de6ece659 100644
--- a/fs/adfs/Makefile
+++ b/fs/adfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux adfs filesystem routines.
 #
diff --git a/fs/adfs/adfs.h b/fs/adfs/adfs.h
index c76db75f02aa..804c6a77c5db 100644
--- a/fs/adfs/adfs.h
+++ b/fs/adfs/adfs.h
@@ -113,19 +113,6 @@ struct object_info {
 	__u16		filetype;
 };
 
-/* RISC OS 12-bit filetype converts to ,xyz hex filename suffix */
-static inline int append_filetype_suffix(char *buf, __u16 filetype)
-{
-	if (filetype == 0xffff)	/* no explicit 12-bit file type was set */
-		return 0;
-
-	*buf++ = ',';
-	*buf++ = hex_asc_lo(filetype >> 8);
-	*buf++ = hex_asc_lo(filetype >> 4);
-	*buf++ = hex_asc_lo(filetype >> 0);
-	return 4;
-}
-
 struct adfs_dir_ops {
 	int	(*read)(struct super_block *sb, unsigned int id, unsigned int sz, struct adfs_dir *dir);
 	int	(*setpos)(struct adfs_dir *dir, unsigned int fpos);
@@ -172,6 +159,7 @@ extern const struct dentry_operations adfs_dentry_operations;
 extern const struct adfs_dir_ops adfs_f_dir_ops;
 extern const struct adfs_dir_ops adfs_fplus_dir_ops;
 
+void adfs_object_fixup(struct adfs_dir *dir, struct object_info *obj);
 extern int adfs_dir_update(struct super_block *sb, struct object_info *obj,
 			   int wait);
 
diff --git a/fs/adfs/dir.c b/fs/adfs/dir.c
index e18eff854e1a..35a4d9f4c3ae 100644
--- a/fs/adfs/dir.c
+++ b/fs/adfs/dir.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/adfs/dir.c
  *
  *  Copyright (C) 1999-2000 Russell King
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  *  Common directory handling for ADFS
  */
 #include "adfs.h"
@@ -16,6 +13,50 @@
  */
 static DEFINE_RWLOCK(adfs_dir_lock);
 
+void adfs_object_fixup(struct adfs_dir *dir, struct object_info *obj)
+{
+	unsigned int dots, i;
+
+	/*
+	 * RISC OS allows the use of '/' in directory entry names, so we need
+	 * to fix these up.  '/' is typically used for FAT compatibility to
+	 * represent '.', so do the same conversion here.  In any case, '.'
+	 * will never be in a RISC OS name since it is used as the pathname
+	 * separator.  Handle the case where we may generate a '.' or '..'
+	 * name, replacing the first character with '^' (the RISC OS "parent
+	 * directory" character.)
+	 */
+	for (i = dots = 0; i < obj->name_len; i++)
+		if (obj->name[i] == '/') {
+			obj->name[i] = '.';
+			dots++;
+		}
+
+	if (obj->name_len <= 2 && dots == obj->name_len)
+		obj->name[0] = '^';
+
+	obj->filetype = -1;
+
+	/*
+	 * object is a file and is filetyped and timestamped?
+	 * RISC OS 12-bit filetype is stored in load_address[19:8]
+	 */
+	if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) &&
+	    (0xfff00000 == (0xfff00000 & obj->loadaddr))) {
+		obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8);
+
+		/* optionally append the ,xyz hex filetype suffix */
+		if (ADFS_SB(dir->sb)->s_ftsuffix) {
+			__u16 filetype = obj->filetype;
+
+			obj->name[obj->name_len++] = ',';
+			obj->name[obj->name_len++] = hex_asc_lo(filetype >> 8);
+			obj->name[obj->name_len++] = hex_asc_lo(filetype >> 4);
+			obj->name[obj->name_len++] = hex_asc_lo(filetype >> 0);
+		}
+	}
+}
+
 static int
 adfs_readdir(struct file *file, struct dir_context *ctx)
 {
@@ -100,37 +141,36 @@ out:
 	return ret;
 }
 
-static int
-adfs_match(const struct qstr *name, struct object_info *obj)
+static unsigned char adfs_tolower(unsigned char c)
 {
-	int i;
-
-	if (name->len != obj->name_len)
-		return 0;
+	if (c >= 'A' && c <= 'Z')
+		c += 'a' - 'A';
+	return c;
+}
 
-	for (i = 0; i < name->len; i++) {
-		char c1, c2;
+static int __adfs_compare(const unsigned char *qstr, u32 qlen,
+			  const char *str, u32 len)
+{
+	u32 i;
 
-		c1 = name->name[i];
-		c2 = obj->name[i];
+	if (qlen != len)
+		return 1;
 
-		if (c1 >= 'A' && c1 <= 'Z')
-			c1 += 'a' - 'A';
-		if (c2 >= 'A' && c2 <= 'Z')
-			c2 += 'a' - 'A';
+	for (i = 0; i < qlen; i++)
+		if (adfs_tolower(qstr[i]) != adfs_tolower(str[i]))
+			return 1;
 
-		if (c1 != c2)
-			return 0;
-	}
-	return 1;
+	return 0;
 }
 
-static int
-adfs_dir_lookup_byname(struct inode *inode, const struct qstr *name, struct object_info *obj)
+static int adfs_dir_lookup_byname(struct inode *inode, const struct qstr *qstr,
+				  struct object_info *obj)
 {
 	struct super_block *sb = inode->i_sb;
 	const struct adfs_dir_ops *ops = ADFS_SB(sb)->s_dir;
+	const unsigned char *name;
 	struct adfs_dir dir;
+	u32 name_len;
 	int ret;
 
 	ret = ops->read(sb, inode->i_ino, inode->i_size, &dir);
@@ -153,8 +193,10 @@ adfs_dir_lookup_byname(struct inode *inode, const struct qstr *name, struct obje
 		goto unlock_out;
 
 	ret = -ENOENT;
+	name = qstr->name;
+	name_len = qstr->len;
 	while (ops->getnext(&dir, obj) == 0) {
-		if (adfs_match(name, obj)) {
+		if (!__adfs_compare(name, name_len, obj->name, obj->name_len)) {
 			ret = 0;
 			break;
 		}
@@ -179,30 +221,18 @@ const struct file_operations adfs_dir_operations = {
 static int
 adfs_hash(const struct dentry *parent, struct qstr *qstr)
 {
-	const unsigned int name_len = ADFS_SB(parent->d_sb)->s_namelen;
 	const unsigned char *name;
 	unsigned long hash;
-	int i;
+	u32 len;
 
-	if (qstr->len < name_len)
-		return 0;
+	if (qstr->len > ADFS_SB(parent->d_sb)->s_namelen)
+		return -ENAMETOOLONG;
 
-	/*
-	 * Truncate the name in place, avoids
-	 * having to define a compare function.
-	 */
-	qstr->len = i = name_len;
+	len = qstr->len;
 	name = qstr->name;
 	hash = init_name_hash(parent);
-	while (i--) {
-		char c;
-
-		c = *name++;
-		if (c >= 'A' && c <= 'Z')
-			c += 'a' - 'A';
-
-		hash = partial_name_hash(c, hash);
-	}
+	while (len--)
+		hash = partial_name_hash(adfs_tolower(*name++), hash);
 	qstr->hash = end_name_hash(hash);
 
 	return 0;
@@ -212,30 +242,10 @@ adfs_hash(const struct dentry *parent, struct qstr *qstr)
  * Compare two names, taking note of the name length
  * requirements of the underlying filesystem.
  */
-static int
-adfs_compare(const struct dentry *dentry,
-		unsigned int len, const char *str, const struct qstr *name)
+static int adfs_compare(const struct dentry *dentry, unsigned int len,
+			const char *str, const struct qstr *qstr)
 {
-	int i;
-
-	if (len != name->len)
-		return 1;
-
-	for (i = 0; i < name->len; i++) {
-		char a, b;
-
-		a = str[i];
-		b = name->name[i];
-
-		if (a >= 'A' && a <= 'Z')
-			a += 'a' - 'A';
-		if (b >= 'A' && b <= 'Z')
-			b += 'a' - 'A';
-
-		if (a != b)
-			return 1;
-	}
-	return 0;
+	return __adfs_compare(qstr->name, qstr->len, str, len);
 }
 
 const struct dentry_operations adfs_dentry_operations = {
diff --git a/fs/adfs/dir_f.c b/fs/adfs/dir_f.c
index 0fbfd0b04ae0..7557378e58b3 100644
--- a/fs/adfs/dir_f.c
+++ b/fs/adfs/dir_f.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/adfs/dir_f.c
  *
  * Copyright (C) 1997-1999 Russell King
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  *  E and F format directory handling
  */
 #include <linux/buffer_head.h>
@@ -24,8 +21,11 @@ static inline unsigned int adfs_readval(unsigned char *p, int len)
 
 	switch (len) {
 	case 4:		val |= p[3] << 24;
+			/* fall through */
 	case 3:		val |= p[2] << 16;
+			/* fall through */
 	case 2:		val |= p[1] << 8;
+			/* fall through */
 	default:	val |= p[0];
 	}
 	return val;
@@ -35,27 +35,15 @@ static inline void adfs_writeval(unsigned char *p, int len, unsigned int val)
 {
 	switch (len) {
 	case 4:		p[3] = val >> 24;
+			/* fall through */
 	case 3:		p[2] = val >> 16;
+			/* fall through */
 	case 2:		p[1] = val >> 8;
+			/* fall through */
 	default:	p[0] = val;
 	}
 }
 
-static inline int adfs_readname(char *buf, char *ptr, int maxlen)
-{
-	char *old_buf = buf;
-
-	while ((unsigned char)*ptr >= ' ' && maxlen--) {
-		if (*ptr == '/')
-			*buf++ = '.';
-		else
-			*buf++ = *ptr;
-		ptr++;
-	}
-
-	return buf - old_buf;
-}
-
 #define ror13(v) ((v >> 13) | (v << 19))
 
 #define dir_u8(idx)				\
@@ -210,29 +198,23 @@ static inline void
 adfs_dir2obj(struct adfs_dir *dir, struct object_info *obj,
 	struct adfs_direntry *de)
 {
-	obj->name_len =	adfs_readname(obj->name, de->dirobname, ADFS_F_NAME_LEN);
+	unsigned int name_len;
+
+	for (name_len = 0; name_len < ADFS_F_NAME_LEN; name_len++) {
+		if (de->dirobname[name_len] < ' ')
+			break;
+
+		obj->name[name_len] = de->dirobname[name_len];
+	}
+
+	obj->name_len =	name_len;
 	obj->file_id  = adfs_readval(de->dirinddiscadd, 3);
 	obj->loadaddr = adfs_readval(de->dirload, 4);
 	obj->execaddr = adfs_readval(de->direxec, 4);
 	obj->size     = adfs_readval(de->dirlen,  4);
 	obj->attr     = de->newdiratts;
-	obj->filetype = -1;
 
-	/*
-	 * object is a file and is filetyped and timestamped?
-	 * RISC OS 12-bit filetype is stored in load_address[19:8]
-	 */
-	if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) &&
-		(0xfff00000 == (0xfff00000 & obj->loadaddr))) {
-		obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8);
-
-		/* optionally append the ,xyz hex filetype suffix */
-		if (ADFS_SB(dir->sb)->s_ftsuffix)
-			obj->name_len +=
-				append_filetype_suffix(
-					&obj->name[obj->name_len],
-					obj->filetype);
-	}
+	adfs_object_fixup(dir, obj);
 }
 
 /*
diff --git a/fs/adfs/dir_f.h b/fs/adfs/dir_f.h
index e4713404096c..5aec332b90f5 100644
--- a/fs/adfs/dir_f.h
+++ b/fs/adfs/dir_f.h
@@ -1,12 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *  linux/fs/adfs/dir_f.h
  *
  *  Copyright (C) 1999 Russell King
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  *  Structures of directories on the F format disk
  */
 #ifndef ADFS_DIR_F_H
diff --git a/fs/adfs/dir_fplus.c b/fs/adfs/dir_fplus.c
index c92cfb638c18..6c5fbb0259c9 100644
--- a/fs/adfs/dir_fplus.c
+++ b/fs/adfs/dir_fplus.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/adfs/dir_fplus.c
  *
  *  Copyright (C) 1997-1999 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/buffer_head.h>
 #include <linux/slab.h>
@@ -169,7 +166,7 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
 		(struct adfs_bigdirheader *) dir->bh_fplus[0]->b_data;
 	struct adfs_bigdirentry bde;
 	unsigned int offset;
-	int i, ret = -ENOENT;
+	int ret = -ENOENT;
 
 	if (dir->pos >= le32_to_cpu(h->bigdirentries))
 		goto out;
@@ -193,27 +190,7 @@ adfs_fplus_getnext(struct adfs_dir *dir, struct object_info *obj)
 	offset += le32_to_cpu(bde.bigdirobnameptr);
 
 	dir_memcpy(dir, offset, obj->name, obj->name_len);
-	for (i = 0; i < obj->name_len; i++)
-		if (obj->name[i] == '/')
-			obj->name[i] = '.';
-
-	obj->filetype = -1;
-
-	/*
-	 * object is a file and is filetyped and timestamped?
-	 * RISC OS 12-bit filetype is stored in load_address[19:8]
-	 */
-	if ((0 == (obj->attr & ADFS_NDA_DIRECTORY)) &&
-		(0xfff00000 == (0xfff00000 & obj->loadaddr))) {
-		obj->filetype = (__u16) ((0x000fff00 & obj->loadaddr) >> 8);
-
-		/* optionally append the ,xyz hex filetype suffix */
-		if (ADFS_SB(dir->sb)->s_ftsuffix)
-			obj->name_len +=
-				append_filetype_suffix(
-					&obj->name[obj->name_len],
-					obj->filetype);
-	}
+	adfs_object_fixup(dir, obj);
 
 	dir->pos += 1;
 	ret = 0;
diff --git a/fs/adfs/dir_fplus.h b/fs/adfs/dir_fplus.h
index b55aa41a68fe..4ec0931e36ad 100644
--- a/fs/adfs/dir_fplus.h
+++ b/fs/adfs/dir_fplus.h
@@ -1,12 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *  linux/fs/adfs/dir_fplus.h
  *
  *  Copyright (C) 1999 Russell King
  *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
- *
  *  Structures of directories on the F+ format disk
  */
 
diff --git a/fs/adfs/inode.c b/fs/adfs/inode.c
index 66621e96f9af..904d624541ad 100644
--- a/fs/adfs/inode.c
+++ b/fs/adfs/inode.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/adfs/inode.c
  *
  *  Copyright (C) 1997-1999 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/buffer_head.h>
 #include <linux/writeback.h>
diff --git a/fs/adfs/map.c b/fs/adfs/map.c
index 6935f05202ac..4d34338c6176 100644
--- a/fs/adfs/map.c
+++ b/fs/adfs/map.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/adfs/map.c
  *
  *  Copyright (C) 1997-2002 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/buffer_head.h>
 #include <asm/unaligned.h>
diff --git a/fs/adfs/super.c b/fs/adfs/super.c
index 7e099a7a4eb1..ffb669f9bba7 100644
--- a/fs/adfs/super.c
+++ b/fs/adfs/super.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/adfs/super.c
  *
  *  Copyright (C) 1997-1999 Russell King
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #include <linux/module.h>
 #include <linux/init.h>
@@ -248,17 +245,11 @@ static struct inode *adfs_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void adfs_i_callback(struct rcu_head *head)
+static void adfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(adfs_inode_cachep, ADFS_I(inode));
 }
 
-static void adfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, adfs_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct adfs_inode_info *ei = (struct adfs_inode_info *) foo;
@@ -290,7 +281,7 @@ static void destroy_inodecache(void)
 
 static const struct super_operations adfs_sops = {
 	.alloc_inode	= adfs_alloc_inode,
-	.destroy_inode	= adfs_destroy_inode,
+	.free_inode	= adfs_free_inode,
 	.drop_inode	= generic_delete_inode,
 	.write_inode	= adfs_write_inode,
 	.put_super	= adfs_put_super,
diff --git a/fs/affs/Kconfig b/fs/affs/Kconfig
index a04d9e848d05..84c46b9025c5 100644
--- a/fs/affs/Kconfig
+++ b/fs/affs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config AFFS_FS
 	tristate "Amiga FFS file system support"
 	depends on BLOCK
diff --git a/fs/affs/Makefile b/fs/affs/Makefile
index 3988b4a78339..f2c811429a4e 100644
--- a/fs/affs/Makefile
+++ b/fs/affs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux affs filesystem routines.
 #
diff --git a/fs/affs/super.c b/fs/affs/super.c
index d1ad11a8a4a5..e7d036efbaa1 100644
--- a/fs/affs/super.c
+++ b/fs/affs/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/affs/inode.c
  *
@@ -111,17 +112,11 @@ static struct inode *affs_alloc_inode(struct super_block *sb)
 	return &i->vfs_inode;
 }
 
-static void affs_i_callback(struct rcu_head *head)
+static void affs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(affs_inode_cachep, AFFS_I(inode));
 }
 
-static void affs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, affs_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct affs_inode_info *ei = (struct affs_inode_info *) foo;
@@ -155,7 +150,7 @@ static void destroy_inodecache(void)
 
 static const struct super_operations affs_sops = {
 	.alloc_inode	= affs_alloc_inode,
-	.destroy_inode	= affs_destroy_inode,
+	.free_inode	= affs_free_inode,
 	.write_inode	= affs_write_inode,
 	.evict_inode	= affs_evict_inode,
 	.put_super	= affs_put_super,
@@ -487,7 +482,7 @@ got_root:
 		break;
 	case MUFS_OFS:
 		affs_set_opt(sbi->s_flags, SF_MUFS);
-		/* fall thru */
+		/* fall through */
 	case FS_OFS:
 		affs_set_opt(sbi->s_flags, SF_OFS);
 		sb->s_flags |= SB_NOEXEC;
@@ -495,6 +490,7 @@ got_root:
 	case MUFS_DCOFS:
 	case MUFS_INTLOFS:
 		affs_set_opt(sbi->s_flags, SF_MUFS);
+		/* fall through */
 	case FS_DCOFS:
 	case FS_INTLOFS:
 		affs_set_opt(sbi->s_flags, SF_INTL);
diff --git a/fs/afs/Kconfig b/fs/afs/Kconfig
index 701aaa9b1899..3fb1f559e317 100644
--- a/fs/afs/Kconfig
+++ b/fs/afs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config AFS_FS
 	tristate "Andrew File System support (AFS)"
 	depends on INET
diff --git a/fs/afs/Makefile b/fs/afs/Makefile
index 0738e2bf5193..10359bea7070 100644
--- a/fs/afs/Makefile
+++ b/fs/afs/Makefile
@@ -13,6 +13,7 @@ kafs-y := \
 	cmservice.o \
 	dir.o \
 	dir_edit.o \
+	dir_silly.o \
 	dynroot.o \
 	file.o \
 	flock.o \
@@ -28,7 +29,6 @@ kafs-y := \
 	server.o \
 	server_list.o \
 	super.o \
-	netdevices.o \
 	vlclient.o \
 	vl_list.o \
 	vl_probe.o \
diff --git a/fs/afs/addr_list.c b/fs/afs/addr_list.c
index 967db336d11a..df415c05939e 100644
--- a/fs/afs/addr_list.c
+++ b/fs/afs/addr_list.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Server address list management
  *
  * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/slab.h>
@@ -250,8 +246,8 @@ struct afs_vlserver_list *afs_dns_query(struct afs_cell *cell, time64_t *_expiry
 
 	_enter("%s", cell->name);
 
-	ret = dns_query("afsdb", cell->name, cell->name_len, "srv=1",
-			&result, _expiry);
+	ret = dns_query(cell->net->net, "afsdb", cell->name, cell->name_len,
+			"srv=1", &result, _expiry, true);
 	if (ret < 0) {
 		_leave(" = %d [dns]", ret);
 		return ERR_PTR(ret);
diff --git a/fs/afs/afs.h b/fs/afs/afs.h
index d12ffb457e47..b6d49d646ade 100644
--- a/fs/afs/afs.h
+++ b/fs/afs/afs.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* AFS common types
  *
  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #ifndef AFS_H
@@ -23,6 +19,9 @@
 #define AFSPATHMAX		1024	/* Maximum length of a pathname plus NUL */
 #define AFSOPAQUEMAX		1024	/* Maximum length of an opaque field */
 
+#define AFS_VL_MAX_LIFESPAN	(120 * HZ)
+#define AFS_PROBE_MAX_LIFESPAN	(30 * HZ)
+
 typedef u64			afs_volid_t;
 typedef u64			afs_vnodeid_t;
 typedef u64			afs_dataversion_t;
@@ -69,8 +68,8 @@ typedef enum {
 
 struct afs_callback {
 	time64_t		expires_at;	/* Time at which expires */
-	unsigned		version;	/* Callback version */
-	afs_callback_type_t	type;		/* Type of callback */
+	//unsigned		version;	/* Callback version */
+	//afs_callback_type_t	type;		/* Type of callback */
 };
 
 struct afs_callback_break {
@@ -144,6 +143,15 @@ struct afs_file_status {
 	u32			abort_code;	/* Abort if bulk-fetching this failed */
 };
 
+struct afs_status_cb {
+	struct afs_file_status	status;
+	struct afs_callback	callback;
+	unsigned int		cb_break;	/* Pre-op callback break counter */
+	bool			have_status;	/* True if status record was retrieved */
+	bool			have_cb;	/* True if cb record was retrieved */
+	bool			have_error;	/* True if status.abort_code indicates an error */
+};
+
 /*
  * AFS file status change request
  */
diff --git a/fs/afs/afs_cm.h b/fs/afs/afs_cm.h
index 255f5dd6040c..565cbe0a8af6 100644
--- a/fs/afs/afs_cm.h
+++ b/fs/afs/afs_cm.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* AFS Cache Manager definitions
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #ifndef AFS_CM_H
diff --git a/fs/afs/afs_fs.h b/fs/afs/afs_fs.h
index ddfa88a7a9c0..20ab344baf9d 100644
--- a/fs/afs/afs_fs.h
+++ b/fs/afs/afs_fs.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* AFS File Service definitions
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #ifndef AFS_FS_H
@@ -17,8 +13,10 @@
 
 enum AFS_FS_Operations {
 	FSFETCHDATA		= 130,	/* AFS Fetch file data */
+	FSFETCHACL		= 131,	/* AFS Fetch file ACL */
 	FSFETCHSTATUS		= 132,	/* AFS Fetch file status */
 	FSSTOREDATA		= 133,	/* AFS Store file data */
+	FSSTOREACL		= 134,	/* AFS Store file ACL */
 	FSSTORESTATUS		= 135,	/* AFS Store file status */
 	FSREMOVEFILE		= 136,	/* AFS Remove a file */
 	FSCREATEFILE		= 137,	/* AFS Create a file */
diff --git a/fs/afs/afs_vl.h b/fs/afs/afs_vl.h
index e3c4688f573b..e9b8029920ec 100644
--- a/fs/afs/afs_vl.h
+++ b/fs/afs/afs_vl.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* AFS Volume Location Service client interface
  *
  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #ifndef AFS_VL_H
diff --git a/fs/afs/cache.c b/fs/afs/cache.c
index f6d0a21e8052..037af93e3aba 100644
--- a/fs/afs/cache.c
+++ b/fs/afs/cache.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS caching stuff
  *
  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/sched.h>
diff --git a/fs/afs/callback.c b/fs/afs/callback.c
index 1c7955f5cdaf..6cdd7047c809 100644
--- a/fs/afs/callback.c
+++ b/fs/afs/callback.c
@@ -48,7 +48,7 @@ static struct afs_cb_interest *afs_create_interest(struct afs_server *server,
 	refcount_set(&new->usage, 1);
 	new->sb = vnode->vfs_inode.i_sb;
 	new->vid = vnode->volume->vid;
-	new->server = afs_get_server(server);
+	new->server = afs_get_server(server, afs_server_trace_get_new_cbi);
 	INIT_HLIST_NODE(&new->cb_vlink);
 
 	write_lock(&server->cb_break_lock);
@@ -94,15 +94,15 @@ int afs_register_server_cb_interest(struct afs_vnode *vnode,
 	struct afs_server *server = entry->server;
 
 again:
-	if (vnode->cb_interest &&
-	    likely(vnode->cb_interest == entry->cb_interest))
+	vcbi = rcu_dereference_protected(vnode->cb_interest,
+					 lockdep_is_held(&vnode->io_lock));
+	if (vcbi && likely(vcbi == entry->cb_interest))
 		return 0;
 
 	read_lock(&slist->lock);
 	cbi = afs_get_cb_interest(entry->cb_interest);
 	read_unlock(&slist->lock);
 
-	vcbi = vnode->cb_interest;
 	if (vcbi) {
 		if (vcbi == cbi) {
 			afs_put_cb_interest(afs_v2net(vnode), cbi);
@@ -114,8 +114,9 @@ again:
 		 */
 		if (cbi && vcbi->server == cbi->server) {
 			write_seqlock(&vnode->cb_lock);
-			old = vnode->cb_interest;
-			vnode->cb_interest = cbi;
+			old = rcu_dereference_protected(vnode->cb_interest,
+							lockdep_is_held(&vnode->cb_lock.lock));
+			rcu_assign_pointer(vnode->cb_interest, cbi);
 			write_sequnlock(&vnode->cb_lock);
 			afs_put_cb_interest(afs_v2net(vnode), old);
 			return 0;
@@ -160,8 +161,9 @@ again:
 	 */
 	write_seqlock(&vnode->cb_lock);
 
-	old = vnode->cb_interest;
-	vnode->cb_interest = cbi;
+	old = rcu_dereference_protected(vnode->cb_interest,
+					lockdep_is_held(&vnode->cb_lock.lock));
+	rcu_assign_pointer(vnode->cb_interest, cbi);
 	vnode->cb_s_break = cbi->server->cb_s_break;
 	vnode->cb_v_break = vnode->volume->cb_v_break;
 	clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
@@ -191,10 +193,11 @@ void afs_put_cb_interest(struct afs_net *net, struct afs_cb_interest *cbi)
 				vi = NULL;
 
 			write_unlock(&cbi->server->cb_break_lock);
-			kfree(vi);
-			afs_put_server(net, cbi->server);
+			if (vi)
+				kfree_rcu(vi, rcu);
+			afs_put_server(net, cbi->server, afs_server_trace_put_cbi);
 		}
-		kfree(cbi);
+		kfree_rcu(cbi, rcu);
 	}
 }
 
@@ -203,14 +206,13 @@ void afs_put_cb_interest(struct afs_net *net, struct afs_cb_interest *cbi)
  */
 void afs_init_callback_state(struct afs_server *server)
 {
-	if (!test_and_clear_bit(AFS_SERVER_FL_NEW, &server->flags))
-		server->cb_s_break++;
+	server->cb_s_break++;
 }
 
 /*
  * actually break a callback
  */
-void __afs_break_callback(struct afs_vnode *vnode)
+void __afs_break_callback(struct afs_vnode *vnode, enum afs_cb_break_reason reason)
 {
 	_enter("");
 
@@ -219,21 +221,19 @@ void __afs_break_callback(struct afs_vnode *vnode)
 		vnode->cb_break++;
 		afs_clear_permits(vnode);
 
-		spin_lock(&vnode->lock);
-
-		_debug("break callback");
-
-		if (list_empty(&vnode->granted_locks) &&
-		    !list_empty(&vnode->pending_locks))
+		if (vnode->lock_state == AFS_VNODE_LOCK_WAITING_FOR_CB)
 			afs_lock_may_be_available(vnode);
-		spin_unlock(&vnode->lock);
+
+		trace_afs_cb_break(&vnode->fid, vnode->cb_break, reason, true);
+	} else {
+		trace_afs_cb_break(&vnode->fid, vnode->cb_break, reason, false);
 	}
 }
 
-void afs_break_callback(struct afs_vnode *vnode)
+void afs_break_callback(struct afs_vnode *vnode, enum afs_cb_break_reason reason)
 {
 	write_seqlock(&vnode->cb_lock);
-	__afs_break_callback(vnode);
+	__afs_break_callback(vnode, reason);
 	write_sequnlock(&vnode->cb_lock);
 }
 
@@ -279,9 +279,11 @@ static void afs_break_one_callback(struct afs_server *server,
 			struct afs_super_info *as = AFS_FS_S(cbi->sb);
 			struct afs_volume *volume = as->volume;
 
-			write_lock(&volume->cb_break_lock);
+			write_lock(&volume->cb_v_break_lock);
 			volume->cb_v_break++;
-			write_unlock(&volume->cb_break_lock);
+			trace_afs_cb_break(fid, volume->cb_v_break,
+					   afs_cb_break_for_volume_callback, false);
+			write_unlock(&volume->cb_v_break_lock);
 		} else {
 			data.volume = NULL;
 			data.fid = *fid;
@@ -289,8 +291,10 @@ static void afs_break_one_callback(struct afs_server *server,
 						afs_iget5_test, &data);
 			if (inode) {
 				vnode = AFS_FS_I(inode);
-				afs_break_callback(vnode);
+				afs_break_callback(vnode, afs_cb_break_for_callback);
 				iput(inode);
+			} else {
+				trace_afs_cb_miss(fid, afs_cb_break_for_callback);
 			}
 		}
 	}
diff --git a/fs/afs/cell.c b/fs/afs/cell.c
index cf445dbd5f2e..a2a87117d262 100644
--- a/fs/afs/cell.c
+++ b/fs/afs/cell.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS cell and server record management
  *
  * Copyright (C) 2002, 2017 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/slab.h>
@@ -123,6 +119,7 @@ static struct afs_cell *afs_alloc_cell(struct afs_net *net,
 				       const char *name, unsigned int namelen,
 				       const char *addresses)
 {
+	struct afs_vlserver_list *vllist;
 	struct afs_cell *cell;
 	int i, ret;
 
@@ -151,18 +148,14 @@ static struct afs_cell *afs_alloc_cell(struct afs_net *net,
 
 	atomic_set(&cell->usage, 2);
 	INIT_WORK(&cell->manager, afs_manage_cell);
-	cell->flags = ((1 << AFS_CELL_FL_NOT_READY) |
-		       (1 << AFS_CELL_FL_NO_LOOKUP_YET));
 	INIT_LIST_HEAD(&cell->proc_volumes);
 	rwlock_init(&cell->proc_lock);
 	rwlock_init(&cell->vl_servers_lock);
 
-	/* Fill in the VL server list if we were given a list of addresses to
-	 * use.
+	/* Provide a VL server list, filling it in if we were given a list of
+	 * addresses to use.
 	 */
 	if (addresses) {
-		struct afs_vlserver_list *vllist;
-
 		vllist = afs_parse_text_addrs(net,
 					      addresses, strlen(addresses), ':',
 					      VL_SERVICE, AFS_VL_PORT);
@@ -171,18 +164,32 @@ static struct afs_cell *afs_alloc_cell(struct afs_net *net,
 			goto parse_failed;
 		}
 
-		rcu_assign_pointer(cell->vl_servers, vllist);
+		vllist->source = DNS_RECORD_FROM_CONFIG;
+		vllist->status = DNS_LOOKUP_NOT_DONE;
 		cell->dns_expiry = TIME64_MAX;
 	} else {
+		ret = -ENOMEM;
+		vllist = afs_alloc_vlserver_list(0);
+		if (!vllist)
+			goto error;
+		vllist->source = DNS_RECORD_UNAVAILABLE;
+		vllist->status = DNS_LOOKUP_NOT_DONE;
 		cell->dns_expiry = ktime_get_real_seconds();
 	}
 
+	rcu_assign_pointer(cell->vl_servers, vllist);
+
+	cell->dns_source = vllist->source;
+	cell->dns_status = vllist->status;
+	smp_store_release(&cell->dns_lookup_count, 1); /* vs source/status */
+
 	_leave(" = %p", cell);
 	return cell;
 
 parse_failed:
 	if (ret == -EINVAL)
 		printk(KERN_ERR "kAFS: bad VL server IP address\n");
+error:
 	kfree(cell);
 	_leave(" = %d", ret);
 	return ERR_PTR(ret);
@@ -207,6 +214,7 @@ struct afs_cell *afs_lookup_cell(struct afs_net *net,
 {
 	struct afs_cell *cell, *candidate, *cursor;
 	struct rb_node *parent, **pp;
+	enum afs_cell_state state;
 	int ret, n;
 
 	_enter("%s,%s", name, vllist);
@@ -266,18 +274,16 @@ struct afs_cell *afs_lookup_cell(struct afs_net *net,
 
 wait_for_cell:
 	_debug("wait_for_cell");
-	ret = wait_on_bit(&cell->flags, AFS_CELL_FL_NOT_READY, TASK_INTERRUPTIBLE);
-	smp_rmb();
-
-	switch (READ_ONCE(cell->state)) {
-	case AFS_CELL_FAILED:
+	wait_var_event(&cell->state,
+		       ({
+			       state = smp_load_acquire(&cell->state); /* vs error */
+			       state == AFS_CELL_ACTIVE || state == AFS_CELL_FAILED;
+		       }));
+
+	/* Check the state obtained from the wait check. */
+	if (state == AFS_CELL_FAILED) {
 		ret = cell->error;
 		goto error;
-	default:
-		_debug("weird %u %d", cell->state, cell->error);
-		goto error;
-	case AFS_CELL_ACTIVE:
-		break;
 	}
 
 	_leave(" = %p [cell]", cell);
@@ -359,16 +365,46 @@ int afs_cell_init(struct afs_net *net, const char *rootcell)
 /*
  * Update a cell's VL server address list from the DNS.
  */
-static void afs_update_cell(struct afs_cell *cell)
+static int afs_update_cell(struct afs_cell *cell)
 {
-	struct afs_vlserver_list *vllist, *old;
+	struct afs_vlserver_list *vllist, *old = NULL, *p;
 	unsigned int min_ttl = READ_ONCE(afs_cell_min_ttl);
 	unsigned int max_ttl = READ_ONCE(afs_cell_max_ttl);
 	time64_t now, expiry = 0;
+	int ret = 0;
 
 	_enter("%s", cell->name);
 
 	vllist = afs_dns_query(cell, &expiry);
+	if (IS_ERR(vllist)) {
+		ret = PTR_ERR(vllist);
+
+		_debug("%s: fail %d", cell->name, ret);
+		if (ret == -ENOMEM)
+			goto out_wake;
+
+		ret = -ENOMEM;
+		vllist = afs_alloc_vlserver_list(0);
+		if (!vllist)
+			goto out_wake;
+
+		switch (ret) {
+		case -ENODATA:
+		case -EDESTADDRREQ:
+			vllist->status = DNS_LOOKUP_GOT_NOT_FOUND;
+			break;
+		case -EAGAIN:
+		case -ECONNREFUSED:
+			vllist->status = DNS_LOOKUP_GOT_TEMP_FAILURE;
+			break;
+		default:
+			vllist->status = DNS_LOOKUP_GOT_LOCAL_FAILURE;
+			break;
+		}
+	}
+
+	_debug("%s: got list %d %d", cell->name, vllist->source, vllist->status);
+	cell->dns_status = vllist->status;
 
 	now = ktime_get_real_seconds();
 	if (min_ttl > max_ttl)
@@ -378,48 +414,47 @@ static void afs_update_cell(struct afs_cell *cell)
 	else if (expiry > now + max_ttl)
 		expiry = now + max_ttl;
 
-	if (IS_ERR(vllist)) {
-		switch (PTR_ERR(vllist)) {
-		case -ENODATA:
-		case -EDESTADDRREQ:
+	_debug("%s: status %d", cell->name, vllist->status);
+	if (vllist->source == DNS_RECORD_UNAVAILABLE) {
+		switch (vllist->status) {
+		case DNS_LOOKUP_GOT_NOT_FOUND:
 			/* The DNS said that the cell does not exist or there
 			 * weren't any addresses to be had.
 			 */
-			set_bit(AFS_CELL_FL_NOT_FOUND, &cell->flags);
-			clear_bit(AFS_CELL_FL_DNS_FAIL, &cell->flags);
 			cell->dns_expiry = expiry;
 			break;
 
-		case -EAGAIN:
-		case -ECONNREFUSED:
+		case DNS_LOOKUP_BAD:
+		case DNS_LOOKUP_GOT_LOCAL_FAILURE:
+		case DNS_LOOKUP_GOT_TEMP_FAILURE:
+		case DNS_LOOKUP_GOT_NS_FAILURE:
 		default:
-			set_bit(AFS_CELL_FL_DNS_FAIL, &cell->flags);
 			cell->dns_expiry = now + 10;
 			break;
 		}
-
-		cell->error = -EDESTADDRREQ;
 	} else {
-		clear_bit(AFS_CELL_FL_DNS_FAIL, &cell->flags);
-		clear_bit(AFS_CELL_FL_NOT_FOUND, &cell->flags);
-
-		/* Exclusion on changing vl_addrs is achieved by a
-		 * non-reentrant work item.
-		 */
-		old = rcu_dereference_protected(cell->vl_servers, true);
-		rcu_assign_pointer(cell->vl_servers, vllist);
 		cell->dns_expiry = expiry;
-
-		if (old)
-			afs_put_vlserverlist(cell->net, old);
 	}
 
-	if (test_and_clear_bit(AFS_CELL_FL_NO_LOOKUP_YET, &cell->flags))
-		wake_up_bit(&cell->flags, AFS_CELL_FL_NO_LOOKUP_YET);
+	/* Replace the VL server list if the new record has servers or the old
+	 * record doesn't.
+	 */
+	write_lock(&cell->vl_servers_lock);
+	p = rcu_dereference_protected(cell->vl_servers, true);
+	if (vllist->nr_servers > 0 || p->nr_servers == 0) {
+		rcu_assign_pointer(cell->vl_servers, vllist);
+		cell->dns_source = vllist->source;
+		old = p;
+	}
+	write_unlock(&cell->vl_servers_lock);
+	afs_put_vlserverlist(cell->net, old);
 
-	now = ktime_get_real_seconds();
-	afs_set_cell_timer(cell->net, cell->dns_expiry - now);
-	_leave("");
+out_wake:
+	smp_store_release(&cell->dns_lookup_count,
+			  cell->dns_lookup_count + 1); /* vs source/status */
+	wake_up_var(&cell->dns_lookup_count);
+	_leave(" = %d", ret);
+	return ret;
 }
 
 /*
@@ -490,8 +525,7 @@ void afs_put_cell(struct afs_net *net, struct afs_cell *cell)
 	now = ktime_get_real_seconds();
 	cell->last_inactive = now;
 	expire_delay = 0;
-	if (!test_bit(AFS_CELL_FL_DNS_FAIL, &cell->flags) &&
-	    !test_bit(AFS_CELL_FL_NOT_FOUND, &cell->flags))
+	if (cell->vl_servers->nr_servers)
 		expire_delay = afs_cell_gc_delay;
 
 	if (atomic_dec_return(&cell->usage) > 1)
@@ -622,11 +656,13 @@ again:
 			goto final_destruction;
 		if (cell->state == AFS_CELL_FAILED)
 			goto done;
-		cell->state = AFS_CELL_UNSET;
+		smp_store_release(&cell->state, AFS_CELL_UNSET);
+		wake_up_var(&cell->state);
 		goto again;
 
 	case AFS_CELL_UNSET:
-		cell->state = AFS_CELL_ACTIVATING;
+		smp_store_release(&cell->state, AFS_CELL_ACTIVATING);
+		wake_up_var(&cell->state);
 		goto again;
 
 	case AFS_CELL_ACTIVATING:
@@ -634,28 +670,29 @@ again:
 		if (ret < 0)
 			goto activation_failed;
 
-		cell->state = AFS_CELL_ACTIVE;
-		smp_wmb();
-		clear_bit(AFS_CELL_FL_NOT_READY, &cell->flags);
-		wake_up_bit(&cell->flags, AFS_CELL_FL_NOT_READY);
+		smp_store_release(&cell->state, AFS_CELL_ACTIVE);
+		wake_up_var(&cell->state);
 		goto again;
 
 	case AFS_CELL_ACTIVE:
 		if (atomic_read(&cell->usage) > 1) {
-			time64_t now = ktime_get_real_seconds();
-			if (cell->dns_expiry <= now && net->live)
-				afs_update_cell(cell);
+			if (test_and_clear_bit(AFS_CELL_FL_DO_LOOKUP, &cell->flags)) {
+				ret = afs_update_cell(cell);
+				if (ret < 0)
+					cell->error = ret;
+			}
 			goto done;
 		}
-		cell->state = AFS_CELL_DEACTIVATING;
+		smp_store_release(&cell->state, AFS_CELL_DEACTIVATING);
+		wake_up_var(&cell->state);
 		goto again;
 
 	case AFS_CELL_DEACTIVATING:
-		set_bit(AFS_CELL_FL_NOT_READY, &cell->flags);
 		if (atomic_read(&cell->usage) > 1)
 			goto reverse_deactivation;
 		afs_deactivate_cell(net, cell);
-		cell->state = AFS_CELL_INACTIVE;
+		smp_store_release(&cell->state, AFS_CELL_INACTIVE);
+		wake_up_var(&cell->state);
 		goto again;
 
 	default:
@@ -668,17 +705,13 @@ activation_failed:
 	cell->error = ret;
 	afs_deactivate_cell(net, cell);
 
-	cell->state = AFS_CELL_FAILED;
-	smp_wmb();
-	if (test_and_clear_bit(AFS_CELL_FL_NOT_READY, &cell->flags))
-		wake_up_bit(&cell->flags, AFS_CELL_FL_NOT_READY);
+	smp_store_release(&cell->state, AFS_CELL_FAILED); /* vs error */
+	wake_up_var(&cell->state);
 	goto again;
 
 reverse_deactivation:
-	cell->state = AFS_CELL_ACTIVE;
-	smp_wmb();
-	clear_bit(AFS_CELL_FL_NOT_READY, &cell->flags);
-	wake_up_bit(&cell->flags, AFS_CELL_FL_NOT_READY);
+	smp_store_release(&cell->state, AFS_CELL_ACTIVE);
+	wake_up_var(&cell->state);
 	_leave(" [deact->act]");
 	return;
 
@@ -738,11 +771,16 @@ void afs_manage_cells(struct work_struct *work)
 		}
 
 		if (usage == 1) {
+			struct afs_vlserver_list *vllist;
 			time64_t expire_at = cell->last_inactive;
 
-			if (!test_bit(AFS_CELL_FL_DNS_FAIL, &cell->flags) &&
-			    !test_bit(AFS_CELL_FL_NOT_FOUND, &cell->flags))
+			read_lock(&cell->vl_servers_lock);
+			vllist = rcu_dereference_protected(
+				cell->vl_servers,
+				lockdep_is_held(&cell->vl_servers_lock));
+			if (vllist->nr_servers > 0)
 				expire_at += afs_cell_gc_delay;
+			read_unlock(&cell->vl_servers_lock);
 			if (purging || expire_at <= now)
 				sched_cell = true;
 			else if (expire_at < next_manage)
@@ -750,10 +788,8 @@ void afs_manage_cells(struct work_struct *work)
 		}
 
 		if (!purging) {
-			if (cell->dns_expiry <= now)
+			if (test_bit(AFS_CELL_FL_DO_LOOKUP, &cell->flags))
 				sched_cell = true;
-			else if (cell->dns_expiry <= next_manage)
-				next_manage = cell->dns_expiry;
 		}
 
 		if (sched_cell)
diff --git a/fs/afs/cmservice.c b/fs/afs/cmservice.c
index 8ee5972893ed..4f1b6f466ff5 100644
--- a/fs/afs/cmservice.c
+++ b/fs/afs/cmservice.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS Cache Manager Service
  *
  * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/module.h>
@@ -34,7 +30,7 @@ static void SRXAFSCB_TellMeAboutYourself(struct work_struct *);
 static int afs_deliver_yfs_cb_callback(struct afs_call *);
 
 #define CM_NAME(name) \
-	const char afs_SRXCB##name##_name[] __tracepoint_string =	\
+	char afs_SRXCB##name##_name[] __tracepoint_string =	\
 		"CB." #name
 
 /*
@@ -213,7 +209,7 @@ static int afs_find_cm_server_by_peer(struct afs_call *call)
 		return 0;
 	}
 
-	call->cm_server = server;
+	call->server = server;
 	return afs_record_cm_probe(call, server);
 }
 
@@ -234,7 +230,7 @@ static int afs_find_cm_server_by_uuid(struct afs_call *call,
 		return 0;
 	}
 
-	call->cm_server = server;
+	call->server = server;
 	return afs_record_cm_probe(call, server);
 }
 
@@ -260,8 +256,11 @@ static void SRXAFSCB_CallBack(struct work_struct *work)
 	 * server holds up change visibility till it receives our reply so as
 	 * to maintain cache coherency.
 	 */
-	if (call->cm_server)
-		afs_break_callbacks(call->cm_server, call->count, call->request);
+	if (call->server) {
+		trace_afs_server(call->server, atomic_read(&call->server->usage),
+				 afs_server_trace_callback);
+		afs_break_callbacks(call->server, call->count, call->request);
+	}
 
 	afs_send_empty_reply(call);
 	afs_put_call(call);
@@ -285,6 +284,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		call->unmarshall++;
 
 		/* extract the FID array and its count in two steps */
+		/* fall through */
 	case 1:
 		_debug("extract FID count");
 		ret = afs_extract_data(call, true);
@@ -304,6 +304,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		afs_extract_to_buf(call, call->count * 3 * 4);
 		call->unmarshall++;
 
+		/* Fall through */
 	case 2:
 		_debug("extract FID array");
 		ret = afs_extract_data(call, true);
@@ -329,6 +330,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		call->unmarshall++;
 
 		/* extract the callback array and its count in two steps */
+		/* fall through */
 	case 3:
 		_debug("extract CB count");
 		ret = afs_extract_data(call, true);
@@ -344,6 +346,7 @@ static int afs_deliver_cb_callback(struct afs_call *call)
 		iov_iter_discard(&call->iter, READ, call->count2 * 3 * 4);
 		call->unmarshall++;
 
+		/* Fall through */
 	case 4:
 		_debug("extract discard %zu/%u",
 		       iov_iter_count(&call->iter), call->count2 * 3 * 4);
@@ -372,10 +375,10 @@ static void SRXAFSCB_InitCallBackState(struct work_struct *work)
 {
 	struct afs_call *call = container_of(work, struct afs_call, work);
 
-	_enter("{%p}", call->cm_server);
+	_enter("{%p}", call->server);
 
-	if (call->cm_server)
-		afs_init_callback_state(call->cm_server);
+	if (call->server)
+		afs_init_callback_state(call->server);
 	afs_send_empty_reply(call);
 	afs_put_call(call);
 	_leave("");
@@ -422,6 +425,7 @@ static int afs_deliver_cb_init_call_back_state3(struct afs_call *call)
 		afs_extract_to_buf(call, 11 * sizeof(__be32));
 		call->unmarshall++;
 
+		/* Fall through */
 	case 1:
 		_debug("extract UUID");
 		ret = afs_extract_data(call, false);
@@ -537,6 +541,7 @@ static int afs_deliver_cb_probe_uuid(struct afs_call *call)
 		afs_extract_to_buf(call, 11 * sizeof(__be32));
 		call->unmarshall++;
 
+		/* Fall through */
 	case 1:
 		_debug("extract UUID");
 		ret = afs_extract_data(call, false);
@@ -578,9 +583,8 @@ static int afs_deliver_cb_probe_uuid(struct afs_call *call)
  */
 static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
 {
-	struct afs_interface *ifs;
 	struct afs_call *call = container_of(work, struct afs_call, work);
-	int loop, nifs;
+	int loop;
 
 	struct {
 		struct /* InterfaceAddr */ {
@@ -598,19 +602,7 @@ static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
 
 	_enter("");
 
-	nifs = 0;
-	ifs = kcalloc(32, sizeof(*ifs), GFP_KERNEL);
-	if (ifs) {
-		nifs = afs_get_ipv4_interfaces(call->net, ifs, 32, false);
-		if (nifs < 0) {
-			kfree(ifs);
-			ifs = NULL;
-			nifs = 0;
-		}
-	}
-
 	memset(&reply, 0, sizeof(reply));
-	reply.ia.nifs = htonl(nifs);
 
 	reply.ia.uuid[0] = call->net->uuid.time_low;
 	reply.ia.uuid[1] = htonl(ntohs(call->net->uuid.time_mid));
@@ -620,15 +612,6 @@ static void SRXAFSCB_TellMeAboutYourself(struct work_struct *work)
 	for (loop = 0; loop < 6; loop++)
 		reply.ia.uuid[loop + 5] = htonl((s8) call->net->uuid.node[loop]);
 
-	if (ifs) {
-		for (loop = 0; loop < nifs; loop++) {
-			reply.ia.ifaddr[loop] = ifs[loop].address.s_addr;
-			reply.ia.netmask[loop] = ifs[loop].netmask.s_addr;
-			reply.ia.mtu[loop] = htonl(ifs[loop].mtu);
-		}
-		kfree(ifs);
-	}
-
 	reply.cap.capcount = htonl(1);
 	reply.cap.caps[0] = htonl(AFS_CAP_ERROR_TRANSLATION);
 	afs_send_simple_reply(call, &reply, sizeof(reply));
@@ -673,6 +656,7 @@ static int afs_deliver_yfs_cb_callback(struct afs_call *call)
 		call->unmarshall++;
 
 		/* extract the FID array and its count in two steps */
+		/* Fall through */
 	case 1:
 		_debug("extract FID count");
 		ret = afs_extract_data(call, true);
@@ -692,6 +676,7 @@ static int afs_deliver_yfs_cb_callback(struct afs_call *call)
 		afs_extract_to_buf(call, size);
 		call->unmarshall++;
 
+		/* Fall through */
 	case 2:
 		_debug("extract FID array");
 		ret = afs_extract_data(call, false);
diff --git a/fs/afs/dir.c b/fs/afs/dir.c
index 8a2562e3a316..e640d67274be 100644
--- a/fs/afs/dir.c
+++ b/fs/afs/dir.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* dir.c: AFS filesystem directory handling
  *
  * Copyright (C) 2002, 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -18,6 +14,7 @@
 #include <linux/sched.h>
 #include <linux/task_io_accounting_ops.h>
 #include "internal.h"
+#include "afs_fs.h"
 #include "xdr_fs.h"
 
 static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
@@ -26,6 +23,7 @@ static int afs_dir_open(struct inode *inode, struct file *file);
 static int afs_readdir(struct file *file, struct dir_context *ctx);
 static int afs_d_revalidate(struct dentry *dentry, unsigned int flags);
 static int afs_d_delete(const struct dentry *dentry);
+static void afs_d_iput(struct dentry *dentry, struct inode *inode);
 static int afs_lookup_one_filldir(struct dir_context *ctx, const char *name, int nlen,
 				  loff_t fpos, u64 ino, unsigned dtype);
 static int afs_lookup_filldir(struct dir_context *ctx, const char *name, int nlen,
@@ -85,6 +83,7 @@ const struct dentry_operations afs_fs_dentry_operations = {
 	.d_delete	= afs_d_delete,
 	.d_release	= afs_d_release,
 	.d_automount	= afs_d_automount,
+	.d_iput		= afs_d_iput,
 };
 
 struct afs_lookup_one_cookie {
@@ -100,8 +99,8 @@ struct afs_lookup_cookie {
 	bool			found;
 	bool			one_only;
 	unsigned short		nr_fids;
-	struct afs_file_status	*statuses;
-	struct afs_callback	*callbacks;
+	struct inode		**inodes;
+	struct afs_status_cb	*statuses;
 	struct afs_fid		fids[50];
 };
 
@@ -160,6 +159,38 @@ error:
 }
 
 /*
+ * Check the contents of a directory that we've just read.
+ */
+static bool afs_dir_check_pages(struct afs_vnode *dvnode, struct afs_read *req)
+{
+	struct afs_xdr_dir_page *dbuf;
+	unsigned int i, j, qty = PAGE_SIZE / sizeof(union afs_xdr_dir_block);
+
+	for (i = 0; i < req->nr_pages; i++)
+		if (!afs_dir_check_page(dvnode, req->pages[i], req->actual_len))
+			goto bad;
+	return true;
+
+bad:
+	pr_warn("DIR %llx:%llx f=%llx l=%llx al=%llx r=%llx\n",
+		dvnode->fid.vid, dvnode->fid.vnode,
+		req->file_size, req->len, req->actual_len, req->remain);
+	pr_warn("DIR %llx %x %x %x\n",
+		req->pos, req->index, req->nr_pages, req->offset);
+
+	for (i = 0; i < req->nr_pages; i++) {
+		dbuf = kmap(req->pages[i]);
+		for (j = 0; j < qty; j++) {
+			union afs_xdr_dir_block *block = &dbuf->blocks[j];
+
+			pr_warn("[%02x] %32phN\n", i * qty + j, block);
+		}
+		kunmap(req->pages[i]);
+	}
+	return false;
+}
+
+/*
  * open an AFS directory file
  */
 static int afs_dir_open(struct inode *inode, struct file *file)
@@ -207,8 +238,7 @@ retry:
 	if (nr_inline > (PAGE_SIZE - sizeof(*req)) / sizeof(struct page *))
 		nr_inline = 0;
 
-	req = kzalloc(sizeof(*req) + sizeof(struct page *) * nr_inline,
-		      GFP_KERNEL);
+	req = kzalloc(struct_size(req, array, nr_inline), GFP_KERNEL);
 	if (!req)
 		return ERR_PTR(-ENOMEM);
 
@@ -277,6 +307,7 @@ retry:
 		goto error;
 
 	if (!test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) {
+		trace_afs_reload_dir(dvnode);
 		ret = afs_fetch_data(dvnode, key, req);
 		if (ret < 0)
 			goto error_unlock;
@@ -288,10 +319,8 @@ retry:
 
 		/* Validate the data we just read. */
 		ret = -EIO;
-		for (i = 0; i < req->nr_pages; i++)
-			if (!afs_dir_check_page(dvnode, req->pages[i],
-						req->actual_len))
-				goto error_unlock;
+		if (!afs_dir_check_pages(dvnode, req))
+			goto error_unlock;
 
 		// TODO: Trim excess pages
 
@@ -605,12 +634,14 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry,
 				   struct key *key)
 {
 	struct afs_lookup_cookie *cookie;
-	struct afs_cb_interest *cbi = NULL;
+	struct afs_cb_interest *dcbi, *cbi = NULL;
 	struct afs_super_info *as = dir->i_sb->s_fs_info;
-	struct afs_iget_data data;
+	struct afs_status_cb *scb;
+	struct afs_iget_data iget_data;
 	struct afs_fs_cursor fc;
-	struct afs_vnode *dvnode = AFS_FS_I(dir);
-	struct inode *inode = NULL;
+	struct afs_server *server;
+	struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode;
+	struct inode *inode = NULL, *ti;
 	int ret, i;
 
 	_enter("{%lu},%p{%pd},", dir->i_ino, dentry, dentry);
@@ -624,10 +655,14 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry,
 	cookie->nr_fids = 1; /* slot 0 is saved for the fid we actually want */
 
 	read_seqlock_excl(&dvnode->cb_lock);
-	if (dvnode->cb_interest &&
-	    dvnode->cb_interest->server &&
-	    test_bit(AFS_SERVER_FL_NO_IBULK, &dvnode->cb_interest->server->flags))
-		cookie->one_only = true;
+	dcbi = rcu_dereference_protected(dvnode->cb_interest,
+					 lockdep_is_held(&dvnode->cb_lock.lock));
+	if (dcbi) {
+		server = dcbi->server;
+		if (server &&
+		    test_bit(AFS_SERVER_FL_NO_IBULK, &server->flags))
+			cookie->one_only = true;
+	}
 	read_sequnlock_excl(&dvnode->cb_lock);
 
 	for (i = 0; i < 50; i++)
@@ -645,24 +680,43 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry,
 		goto out;
 
 	/* Check to see if we already have an inode for the primary fid. */
-	data.volume = dvnode->volume;
-	data.fid = cookie->fids[0];
-	inode = ilookup5(dir->i_sb, cookie->fids[0].vnode, afs_iget5_test, &data);
+	iget_data.fid = cookie->fids[0];
+	iget_data.volume = dvnode->volume;
+	iget_data.cb_v_break = dvnode->volume->cb_v_break;
+	iget_data.cb_s_break = 0;
+	inode = ilookup5(dir->i_sb, cookie->fids[0].vnode,
+			 afs_iget5_test, &iget_data);
 	if (inode)
 		goto out;
 
 	/* Need space for examining all the selected files */
 	inode = ERR_PTR(-ENOMEM);
-	cookie->statuses = kcalloc(cookie->nr_fids, sizeof(struct afs_file_status),
-				   GFP_KERNEL);
+	cookie->statuses = kvcalloc(cookie->nr_fids, sizeof(struct afs_status_cb),
+				    GFP_KERNEL);
 	if (!cookie->statuses)
 		goto out;
 
-	cookie->callbacks = kcalloc(cookie->nr_fids, sizeof(struct afs_callback),
-				    GFP_KERNEL);
-	if (!cookie->callbacks)
+	cookie->inodes = kcalloc(cookie->nr_fids, sizeof(struct inode *),
+				 GFP_KERNEL);
+	if (!cookie->inodes)
 		goto out_s;
 
+	for (i = 1; i < cookie->nr_fids; i++) {
+		scb = &cookie->statuses[i];
+
+		/* Find any inodes that already exist and get their
+		 * callback counters.
+		 */
+		iget_data.fid = cookie->fids[i];
+		ti = ilookup5_nowait(dir->i_sb, iget_data.fid.vnode,
+				     afs_iget5_test, &iget_data);
+		if (!IS_ERR_OR_NULL(ti)) {
+			vnode = AFS_FS_I(ti);
+			scb->cb_break = afs_calc_vnode_cb_break(vnode);
+			cookie->inodes[i] = ti;
+		}
+	}
+
 	/* Try FS.InlineBulkStatus first.  Abort codes for the individual
 	 * lookups contained therein are stored in the reply without aborting
 	 * the whole operation.
@@ -671,7 +725,7 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry,
 		goto no_inline_bulk_status;
 
 	inode = ERR_PTR(-ERESTARTSYS);
-	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+	if (afs_begin_vnode_operation(&fc, dvnode, key, true)) {
 		while (afs_select_fileserver(&fc)) {
 			if (test_bit(AFS_SERVER_FL_NO_IBULK,
 				      &fc.cbi->server->flags)) {
@@ -679,11 +733,12 @@ static struct inode *afs_do_lookup(struct inode *dir, struct dentry *dentry,
 				fc.ac.error = -ECONNABORTED;
 				break;
 			}
+			iget_data.cb_v_break = dvnode->volume->cb_v_break;
+			iget_data.cb_s_break = fc.cbi->server->cb_s_break;
 			afs_fs_inline_bulk_status(&fc,
 						  afs_v2net(dvnode),
 						  cookie->fids,
 						  cookie->statuses,
-						  cookie->callbacks,
 						  cookie->nr_fids, NULL);
 		}
 
@@ -704,15 +759,16 @@ no_inline_bulk_status:
 	 * any of the lookups fails - so, for the moment, revert to
 	 * FS.FetchStatus for just the primary fid.
 	 */
-	cookie->nr_fids = 1;
 	inode = ERR_PTR(-ERESTARTSYS);
-	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+	if (afs_begin_vnode_operation(&fc, dvnode, key, true)) {
 		while (afs_select_fileserver(&fc)) {
+			iget_data.cb_v_break = dvnode->volume->cb_v_break;
+			iget_data.cb_s_break = fc.cbi->server->cb_s_break;
+			scb = &cookie->statuses[0];
 			afs_fs_fetch_status(&fc,
 					    afs_v2net(dvnode),
 					    cookie->fids,
-					    cookie->statuses,
-					    cookie->callbacks,
+					    scb,
 					    NULL);
 		}
 
@@ -724,26 +780,36 @@ no_inline_bulk_status:
 	if (IS_ERR(inode))
 		goto out_c;
 
-	for (i = 0; i < cookie->nr_fids; i++)
-		cookie->statuses[i].abort_code = 0;
-
 success:
 	/* Turn all the files into inodes and save the first one - which is the
 	 * one we actually want.
 	 */
-	if (cookie->statuses[0].abort_code != 0)
-		inode = ERR_PTR(afs_abort_to_error(cookie->statuses[0].abort_code));
+	scb = &cookie->statuses[0];
+	if (scb->status.abort_code != 0)
+		inode = ERR_PTR(afs_abort_to_error(scb->status.abort_code));
 
 	for (i = 0; i < cookie->nr_fids; i++) {
-		struct inode *ti;
+		struct afs_status_cb *scb = &cookie->statuses[i];
 
-		if (cookie->statuses[i].abort_code != 0)
+		if (!scb->have_status && !scb->have_error)
 			continue;
 
-		ti = afs_iget(dir->i_sb, key, &cookie->fids[i],
-			      &cookie->statuses[i],
-			      &cookie->callbacks[i],
-			      cbi);
+		if (cookie->inodes[i]) {
+			afs_vnode_commit_status(&fc, AFS_FS_I(cookie->inodes[i]),
+						scb->cb_break, NULL, scb);
+			continue;
+		}
+
+		if (scb->status.abort_code != 0)
+			continue;
+
+		iget_data.fid = cookie->fids[i];
+		ti = afs_iget(dir->i_sb, key, &iget_data, scb, cbi, dvnode);
+		if (!IS_ERR(ti))
+			afs_cache_permit(AFS_FS_I(ti), key,
+					 0 /* Assume vnode->cb_break is 0 */ +
+					 iget_data.cb_v_break,
+					 scb);
 		if (i == 0) {
 			inode = ti;
 		} else {
@@ -754,9 +820,13 @@ success:
 
 out_c:
 	afs_put_cb_interest(afs_v2net(dvnode), cbi);
-	kfree(cookie->callbacks);
+	if (cookie->inodes) {
+		for (i = 0; i < cookie->nr_fids; i++)
+			iput(cookie->inodes[i]);
+		kfree(cookie->inodes);
+	}
 out_s:
-	kfree(cookie->statuses);
+	kvfree(cookie->statuses);
 out:
 	kfree(cookie);
 	return inode;
@@ -875,8 +945,14 @@ static struct dentry *afs_lookup(struct inode *dir, struct dentry *dentry,
 			(void *)(unsigned long)dvnode->status.data_version;
 	}
 	d = d_splice_alias(inode, dentry);
-	if (!IS_ERR_OR_NULL(d))
+	if (!IS_ERR_OR_NULL(d)) {
 		d->d_fsdata = dentry->d_fsdata;
+		trace_afs_lookup(dvnode, &d->d_name,
+				 inode ? AFS_FS_I(inode) : NULL);
+	} else {
+		trace_afs_lookup(dvnode, &dentry->d_name,
+				 inode ? AFS_FS_I(inode) : NULL);
+	}
 	return d;
 }
 
@@ -1053,6 +1129,16 @@ zap:
 }
 
 /*
+ * Clean up sillyrename files on dentry removal.
+ */
+static void afs_d_iput(struct dentry *dentry, struct inode *inode)
+{
+	if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
+		afs_silly_iput(dentry, inode);
+	iput(inode);
+}
+
+/*
  * handle dentry release
  */
 void afs_d_release(struct dentry *dentry)
@@ -1065,9 +1151,8 @@ void afs_d_release(struct dentry *dentry)
  */
 static void afs_vnode_new_inode(struct afs_fs_cursor *fc,
 				struct dentry *new_dentry,
-				struct afs_fid *newfid,
-				struct afs_file_status *newstatus,
-				struct afs_callback *newcb)
+				struct afs_iget_data *new_data,
+				struct afs_status_cb *new_scb)
 {
 	struct afs_vnode *vnode;
 	struct inode *inode;
@@ -1076,7 +1161,7 @@ static void afs_vnode_new_inode(struct afs_fs_cursor *fc,
 		return;
 
 	inode = afs_iget(fc->vnode->vfs_inode.i_sb, fc->key,
-			 newfid, newstatus, newcb, fc->cbi);
+			 new_data, new_scb, fc->cbi, fc->vnode);
 	if (IS_ERR(inode)) {
 		/* ENOMEM or EINTR at a really inconvenient time - just abandon
 		 * the new directory on the server.
@@ -1087,22 +1172,29 @@ static void afs_vnode_new_inode(struct afs_fs_cursor *fc,
 
 	vnode = AFS_FS_I(inode);
 	set_bit(AFS_VNODE_NEW_CONTENT, &vnode->flags);
-	afs_vnode_commit_status(fc, vnode, 0);
+	if (fc->ac.error == 0)
+		afs_cache_permit(vnode, fc->key, vnode->cb_break, new_scb);
 	d_instantiate(new_dentry, inode);
 }
 
+static void afs_prep_for_new_inode(struct afs_fs_cursor *fc,
+				   struct afs_iget_data *iget_data)
+{
+	iget_data->volume = fc->vnode->volume;
+	iget_data->cb_v_break = fc->vnode->volume->cb_v_break;
+	iget_data->cb_s_break = fc->cbi->server->cb_s_break;
+}
+
 /*
  * create a directory on an AFS filesystem
  */
 static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 {
-	struct afs_file_status newstatus;
+	struct afs_iget_data iget_data;
+	struct afs_status_cb *scb;
 	struct afs_fs_cursor fc;
-	struct afs_callback newcb;
 	struct afs_vnode *dvnode = AFS_FS_I(dir);
-	struct afs_fid newfid;
 	struct key *key;
-	u64 data_version = dvnode->status.data_version;
 	int ret;
 
 	mode |= S_IFDIR;
@@ -1110,23 +1202,32 @@ static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 	_enter("{%llx:%llu},{%pd},%ho",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry, mode);
 
+	ret = -ENOMEM;
+	scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		goto error;
+
 	key = afs_request_key(dvnode->volume->cell);
 	if (IS_ERR(key)) {
 		ret = PTR_ERR(key);
-		goto error;
+		goto error_scb;
 	}
 
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+	if (afs_begin_vnode_operation(&fc, dvnode, key, true)) {
+		afs_dataversion_t data_version = dvnode->status.data_version + 1;
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(dvnode);
-			afs_fs_create(&fc, dentry->d_name.name, mode, data_version,
-				      &newfid, &newstatus, &newcb);
+			afs_prep_for_new_inode(&fc, &iget_data);
+			afs_fs_create(&fc, dentry->d_name.name, mode,
+				      &scb[0], &iget_data.fid, &scb[1]);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
-		afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb);
+		afs_check_for_remote_deletion(&fc, dvnode);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break,
+					&data_version, &scb[0]);
+		afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]);
 		ret = afs_end_vnode_operation(&fc);
 		if (ret < 0)
 			goto error_key;
@@ -1136,15 +1237,18 @@ static int afs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
 
 	if (ret == 0 &&
 	    test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
-		afs_edit_dir_add(dvnode, &dentry->d_name, &newfid,
+		afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid,
 				 afs_edit_dir_for_create);
 
 	key_put(key);
+	kfree(scb);
 	_leave(" = 0");
 	return 0;
 
 error_key:
 	key_put(key);
+error_scb:
+	kfree(scb);
 error:
 	d_drop(dentry);
 	_leave(" = %d", ret);
@@ -1171,15 +1275,19 @@ static void afs_dir_remove_subdir(struct dentry *dentry)
  */
 static int afs_rmdir(struct inode *dir, struct dentry *dentry)
 {
+	struct afs_status_cb *scb;
 	struct afs_fs_cursor fc;
 	struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode = NULL;
 	struct key *key;
-	u64 data_version = dvnode->status.data_version;
 	int ret;
 
 	_enter("{%llx:%llu},{%pd}",
 	       dvnode->fid.vid, dvnode->fid.vnode, dentry);
 
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		return -ENOMEM;
+
 	key = afs_request_key(dvnode->volume->cell);
 	if (IS_ERR(key)) {
 		ret = PTR_ERR(key);
@@ -1194,15 +1302,23 @@ static int afs_rmdir(struct inode *dir, struct dentry *dentry)
 			goto error_key;
 	}
 
+	if (vnode) {
+		ret = down_write_killable(&vnode->rmdir_lock);
+		if (ret < 0)
+			goto error_key;
+	}
+
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+	if (afs_begin_vnode_operation(&fc, dvnode, key, true)) {
+		afs_dataversion_t data_version = dvnode->status.data_version + 1;
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(dvnode);
-			afs_fs_remove(&fc, vnode, dentry->d_name.name, true,
-				      data_version);
+			afs_fs_remove(&fc, vnode, dentry->d_name.name, true, scb);
 		}
 
-		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break,
+					&data_version, scb);
 		ret = afs_end_vnode_operation(&fc);
 		if (ret == 0) {
 			afs_dir_remove_subdir(dentry);
@@ -1212,9 +1328,12 @@ static int afs_rmdir(struct inode *dir, struct dentry *dentry)
 		}
 	}
 
+	if (vnode)
+		up_write(&vnode->rmdir_lock);
 error_key:
 	key_put(key);
 error:
+	kfree(scb);
 	return ret;
 }
 
@@ -1228,32 +1347,27 @@ error:
  * However, if we didn't have a callback promise outstanding, or it was
  * outstanding on a different server, then it won't break it either...
  */
-static int afs_dir_remove_link(struct dentry *dentry, struct key *key,
-			       unsigned long d_version_before,
-			       unsigned long d_version_after)
+static int afs_dir_remove_link(struct afs_vnode *dvnode, struct dentry *dentry,
+			       struct key *key)
 {
-	bool dir_valid;
 	int ret = 0;
 
-	/* There were no intervening changes on the server if the version
-	 * number we got back was incremented by exactly 1.
-	 */
-	dir_valid = (d_version_after == d_version_before + 1);
-
 	if (d_really_is_positive(dentry)) {
 		struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry));
 
 		if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
 			/* Already done */
-		} else if (dir_valid) {
+		} else if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags)) {
+			write_seqlock(&vnode->cb_lock);
 			drop_nlink(&vnode->vfs_inode);
 			if (vnode->vfs_inode.i_nlink == 0) {
 				set_bit(AFS_VNODE_DELETED, &vnode->flags);
-				clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
+				__afs_break_callback(vnode, afs_cb_break_for_unlink);
 			}
+			write_sequnlock(&vnode->cb_lock);
 			ret = 0;
 		} else {
-			clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
+			afs_break_callback(vnode, afs_cb_break_for_unlink);
 
 			if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
 				kdebug("AFS_VNODE_DELETED");
@@ -1274,10 +1388,11 @@ static int afs_dir_remove_link(struct dentry *dentry, struct key *key,
 static int afs_unlink(struct inode *dir, struct dentry *dentry)
 {
 	struct afs_fs_cursor fc;
-	struct afs_vnode *dvnode = AFS_FS_I(dir), *vnode = NULL;
+	struct afs_status_cb *scb;
+	struct afs_vnode *dvnode = AFS_FS_I(dir);
+	struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry));
 	struct key *key;
-	unsigned long d_version = (unsigned long)dentry->d_fsdata;
-	u64 data_version = dvnode->status.data_version;
+	bool need_rehash = false;
 	int ret;
 
 	_enter("{%llx:%llu},{%pd}",
@@ -1286,53 +1401,79 @@ static int afs_unlink(struct inode *dir, struct dentry *dentry)
 	if (dentry->d_name.len >= AFSNAMEMAX)
 		return -ENAMETOOLONG;
 
+	ret = -ENOMEM;
+	scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		goto error;
+
 	key = afs_request_key(dvnode->volume->cell);
 	if (IS_ERR(key)) {
 		ret = PTR_ERR(key);
-		goto error;
+		goto error_scb;
 	}
 
 	/* Try to make sure we have a callback promise on the victim. */
-	if (d_really_is_positive(dentry)) {
-		vnode = AFS_FS_I(d_inode(dentry));
-		ret = afs_validate(vnode, key);
-		if (ret < 0)
-			goto error_key;
+	ret = afs_validate(vnode, key);
+	if (ret < 0)
+		goto error_key;
+
+	spin_lock(&dentry->d_lock);
+	if (d_count(dentry) > 1) {
+		spin_unlock(&dentry->d_lock);
+		/* Start asynchronous writeout of the inode */
+		write_inode_now(d_inode(dentry), 0);
+		ret = afs_sillyrename(dvnode, vnode, dentry, key);
+		goto error_key;
 	}
+	if (!d_unhashed(dentry)) {
+		/* Prevent a race with RCU lookup. */
+		__d_drop(dentry);
+		need_rehash = true;
+	}
+	spin_unlock(&dentry->d_lock);
 
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+	if (afs_begin_vnode_operation(&fc, dvnode, key, true)) {
+		afs_dataversion_t data_version = dvnode->status.data_version + 1;
+		afs_dataversion_t data_version_2 = vnode->status.data_version;
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(dvnode);
+			fc.cb_break_2 = afs_calc_vnode_cb_break(vnode);
 
 			if (test_bit(AFS_SERVER_FL_IS_YFS, &fc.cbi->server->flags) &&
 			    !test_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags)) {
 				yfs_fs_remove_file2(&fc, vnode, dentry->d_name.name,
-						    data_version);
+						    &scb[0], &scb[1]);
 				if (fc.ac.error != -ECONNABORTED ||
 				    fc.ac.abort_code != RXGEN_OPCODE)
 					continue;
 				set_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags);
 			}
 
-			afs_fs_remove(&fc, vnode, dentry->d_name.name, false,
-				      data_version);
+			afs_fs_remove(&fc, vnode, dentry->d_name.name, false, &scb[0]);
 		}
 
-		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break,
+					&data_version, &scb[0]);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break_2,
+					&data_version_2, &scb[1]);
 		ret = afs_end_vnode_operation(&fc);
-		if (ret == 0)
-			ret = afs_dir_remove_link(
-				dentry, key, d_version,
-				(unsigned long)dvnode->status.data_version);
+		if (ret == 0 && !(scb[1].have_status || scb[1].have_error))
+			ret = afs_dir_remove_link(dvnode, dentry, key);
 		if (ret == 0 &&
 		    test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
 			afs_edit_dir_remove(dvnode, &dentry->d_name,
 					    afs_edit_dir_for_unlink);
 	}
 
+	if (need_rehash && ret < 0 && ret != -ENOENT)
+		d_rehash(dentry);
+
 error_key:
 	key_put(key);
+error_scb:
+	kfree(scb);
 error:
 	_leave(" = %d", ret);
 	return ret;
@@ -1344,13 +1485,11 @@ error:
 static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 		      bool excl)
 {
+	struct afs_iget_data iget_data;
 	struct afs_fs_cursor fc;
-	struct afs_file_status newstatus;
-	struct afs_callback newcb;
+	struct afs_status_cb *scb;
 	struct afs_vnode *dvnode = AFS_FS_I(dir);
-	struct afs_fid newfid;
 	struct key *key;
-	u64 data_version = dvnode->status.data_version;
 	int ret;
 
 	mode |= S_IFREG;
@@ -1368,17 +1507,26 @@ static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 		goto error;
 	}
 
+	ret = -ENOMEM;
+	scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		goto error_scb;
+
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+	if (afs_begin_vnode_operation(&fc, dvnode, key, true)) {
+		afs_dataversion_t data_version = dvnode->status.data_version + 1;
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(dvnode);
-			afs_fs_create(&fc, dentry->d_name.name, mode, data_version,
-				      &newfid, &newstatus, &newcb);
+			afs_prep_for_new_inode(&fc, &iget_data);
+			afs_fs_create(&fc, dentry->d_name.name, mode,
+				      &scb[0], &iget_data.fid, &scb[1]);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
-		afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, &newcb);
+		afs_check_for_remote_deletion(&fc, dvnode);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break,
+					&data_version, &scb[0]);
+		afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]);
 		ret = afs_end_vnode_operation(&fc);
 		if (ret < 0)
 			goto error_key;
@@ -1387,13 +1535,16 @@ static int afs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
 	}
 
 	if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
-		afs_edit_dir_add(dvnode, &dentry->d_name, &newfid,
+		afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid,
 				 afs_edit_dir_for_create);
 
+	kfree(scb);
 	key_put(key);
 	_leave(" = 0");
 	return 0;
 
+error_scb:
+	kfree(scb);
 error_key:
 	key_put(key);
 error:
@@ -1409,15 +1560,12 @@ static int afs_link(struct dentry *from, struct inode *dir,
 		    struct dentry *dentry)
 {
 	struct afs_fs_cursor fc;
-	struct afs_vnode *dvnode, *vnode;
+	struct afs_status_cb *scb;
+	struct afs_vnode *dvnode = AFS_FS_I(dir);
+	struct afs_vnode *vnode = AFS_FS_I(d_inode(from));
 	struct key *key;
-	u64 data_version;
 	int ret;
 
-	vnode = AFS_FS_I(d_inode(from));
-	dvnode = AFS_FS_I(dir);
-	data_version = dvnode->status.data_version;
-
 	_enter("{%llx:%llu},{%llx:%llu},{%pd}",
 	       vnode->fid.vid, vnode->fid.vnode,
 	       dvnode->fid.vid, dvnode->fid.vnode,
@@ -1427,14 +1575,21 @@ static int afs_link(struct dentry *from, struct inode *dir,
 	if (dentry->d_name.len >= AFSNAMEMAX)
 		goto error;
 
+	ret = -ENOMEM;
+	scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		goto error;
+
 	key = afs_request_key(dvnode->volume->cell);
 	if (IS_ERR(key)) {
 		ret = PTR_ERR(key);
-		goto error;
+		goto error_scb;
 	}
 
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+	if (afs_begin_vnode_operation(&fc, dvnode, key, true)) {
+		afs_dataversion_t data_version = dvnode->status.data_version + 1;
+
 		if (mutex_lock_interruptible_nested(&vnode->io_lock, 1) < 0) {
 			afs_end_vnode_operation(&fc);
 			goto error_key;
@@ -1443,11 +1598,14 @@ static int afs_link(struct dentry *from, struct inode *dir,
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(dvnode);
 			fc.cb_break_2 = afs_calc_vnode_cb_break(vnode);
-			afs_fs_link(&fc, vnode, dentry->d_name.name, data_version);
+			afs_fs_link(&fc, vnode, dentry->d_name.name,
+				    &scb[0], &scb[1]);
 		}
 
-		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
-		afs_vnode_commit_status(&fc, vnode, fc.cb_break_2);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break,
+					&data_version, &scb[0]);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break_2,
+					NULL, &scb[1]);
 		ihold(&vnode->vfs_inode);
 		d_instantiate(dentry, &vnode->vfs_inode);
 
@@ -1464,11 +1622,14 @@ static int afs_link(struct dentry *from, struct inode *dir,
 				 afs_edit_dir_for_link);
 
 	key_put(key);
+	kfree(scb);
 	_leave(" = 0");
 	return 0;
 
 error_key:
 	key_put(key);
+error_scb:
+	kfree(scb);
 error:
 	d_drop(dentry);
 	_leave(" = %d", ret);
@@ -1481,12 +1642,11 @@ error:
 static int afs_symlink(struct inode *dir, struct dentry *dentry,
 		       const char *content)
 {
+	struct afs_iget_data iget_data;
 	struct afs_fs_cursor fc;
-	struct afs_file_status newstatus;
+	struct afs_status_cb *scb;
 	struct afs_vnode *dvnode = AFS_FS_I(dir);
-	struct afs_fid newfid;
 	struct key *key;
-	u64 data_version = dvnode->status.data_version;
 	int ret;
 
 	_enter("{%llx:%llu},{%pd},%s",
@@ -1501,24 +1661,32 @@ static int afs_symlink(struct inode *dir, struct dentry *dentry,
 	if (strlen(content) >= AFSPATHMAX)
 		goto error;
 
+	ret = -ENOMEM;
+	scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		goto error;
+
 	key = afs_request_key(dvnode->volume->cell);
 	if (IS_ERR(key)) {
 		ret = PTR_ERR(key);
-		goto error;
+		goto error_scb;
 	}
 
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, dvnode, key)) {
+	if (afs_begin_vnode_operation(&fc, dvnode, key, true)) {
+		afs_dataversion_t data_version = dvnode->status.data_version + 1;
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(dvnode);
-			afs_fs_symlink(&fc, dentry->d_name.name,
-				       content, data_version,
-				       &newfid, &newstatus);
+			afs_prep_for_new_inode(&fc, &iget_data);
+			afs_fs_symlink(&fc, dentry->d_name.name, content,
+				       &scb[0], &iget_data.fid, &scb[1]);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, dvnode, fc.cb_break);
-		afs_vnode_new_inode(&fc, dentry, &newfid, &newstatus, NULL);
+		afs_check_for_remote_deletion(&fc, dvnode);
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break,
+					&data_version, &scb[0]);
+		afs_vnode_new_inode(&fc, dentry, &iget_data, &scb[1]);
 		ret = afs_end_vnode_operation(&fc);
 		if (ret < 0)
 			goto error_key;
@@ -1527,15 +1695,18 @@ static int afs_symlink(struct inode *dir, struct dentry *dentry,
 	}
 
 	if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
-		afs_edit_dir_add(dvnode, &dentry->d_name, &newfid,
+		afs_edit_dir_add(dvnode, &dentry->d_name, &iget_data.fid,
 				 afs_edit_dir_for_symlink);
 
 	key_put(key);
+	kfree(scb);
 	_leave(" = 0");
 	return 0;
 
 error_key:
 	key_put(key);
+error_scb:
+	kfree(scb);
 error:
 	d_drop(dentry);
 	_leave(" = %d", ret);
@@ -1550,20 +1721,24 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
 		      unsigned int flags)
 {
 	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
 	struct afs_vnode *orig_dvnode, *new_dvnode, *vnode;
+	struct dentry *tmp = NULL, *rehash = NULL;
+	struct inode *new_inode;
 	struct key *key;
-	u64 orig_data_version, new_data_version;
 	bool new_negative = d_is_negative(new_dentry);
 	int ret;
 
 	if (flags)
 		return -EINVAL;
 
+	/* Don't allow silly-rename files be moved around. */
+	if (old_dentry->d_flags & DCACHE_NFSFS_RENAMED)
+		return -EINVAL;
+
 	vnode = AFS_FS_I(d_inode(old_dentry));
 	orig_dvnode = AFS_FS_I(old_dir);
 	new_dvnode = AFS_FS_I(new_dir);
-	orig_data_version = orig_dvnode->status.data_version;
-	new_data_version = new_dvnode->status.data_version;
 
 	_enter("{%llx:%llu},{%llx:%llu},{%llx:%llu},{%pd}",
 	       orig_dvnode->fid.vid, orig_dvnode->fid.vnode,
@@ -1571,54 +1746,126 @@ static int afs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	       new_dvnode->fid.vid, new_dvnode->fid.vnode,
 	       new_dentry);
 
+	ret = -ENOMEM;
+	scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		goto error;
+
 	key = afs_request_key(orig_dvnode->volume->cell);
 	if (IS_ERR(key)) {
 		ret = PTR_ERR(key);
-		goto error;
+		goto error_scb;
+	}
+
+	/* For non-directories, check whether the target is busy and if so,
+	 * make a copy of the dentry and then do a silly-rename.  If the
+	 * silly-rename succeeds, the copied dentry is hashed and becomes the
+	 * new target.
+	 */
+	if (d_is_positive(new_dentry) && !d_is_dir(new_dentry)) {
+		/* To prevent any new references to the target during the
+		 * rename, we unhash the dentry in advance.
+		 */
+		if (!d_unhashed(new_dentry)) {
+			d_drop(new_dentry);
+			rehash = new_dentry;
+		}
+
+		if (d_count(new_dentry) > 2) {
+			/* copy the target dentry's name */
+			ret = -ENOMEM;
+			tmp = d_alloc(new_dentry->d_parent,
+				      &new_dentry->d_name);
+			if (!tmp)
+				goto error_rehash;
+
+			ret = afs_sillyrename(new_dvnode,
+					      AFS_FS_I(d_inode(new_dentry)),
+					      new_dentry, key);
+			if (ret)
+				goto error_rehash;
+
+			new_dentry = tmp;
+			rehash = NULL;
+			new_negative = true;
+		}
 	}
 
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, orig_dvnode, key)) {
+	if (afs_begin_vnode_operation(&fc, orig_dvnode, key, true)) {
+		afs_dataversion_t orig_data_version;
+		afs_dataversion_t new_data_version;
+		struct afs_status_cb *new_scb = &scb[1];
+
+		orig_data_version = orig_dvnode->status.data_version + 1;
+
 		if (orig_dvnode != new_dvnode) {
 			if (mutex_lock_interruptible_nested(&new_dvnode->io_lock, 1) < 0) {
 				afs_end_vnode_operation(&fc);
-				goto error_key;
+				goto error_rehash;
 			}
+			new_data_version = new_dvnode->status.data_version;
+		} else {
+			new_data_version = orig_data_version;
+			new_scb = &scb[0];
 		}
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(orig_dvnode);
 			fc.cb_break_2 = afs_calc_vnode_cb_break(new_dvnode);
 			afs_fs_rename(&fc, old_dentry->d_name.name,
 				      new_dvnode, new_dentry->d_name.name,
-				      orig_data_version, new_data_version);
+				      &scb[0], new_scb);
 		}
 
-		afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break);
-		afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2);
-		if (orig_dvnode != new_dvnode)
+		afs_vnode_commit_status(&fc, orig_dvnode, fc.cb_break,
+					&orig_data_version, &scb[0]);
+		if (new_dvnode != orig_dvnode) {
+			afs_vnode_commit_status(&fc, new_dvnode, fc.cb_break_2,
+						&new_data_version, &scb[1]);
 			mutex_unlock(&new_dvnode->io_lock);
+		}
 		ret = afs_end_vnode_operation(&fc);
 		if (ret < 0)
-			goto error_key;
+			goto error_rehash;
 	}
 
 	if (ret == 0) {
+		if (rehash)
+			d_rehash(rehash);
 		if (test_bit(AFS_VNODE_DIR_VALID, &orig_dvnode->flags))
 		    afs_edit_dir_remove(orig_dvnode, &old_dentry->d_name,
-					afs_edit_dir_for_rename);
+					afs_edit_dir_for_rename_0);
 
 		if (!new_negative &&
 		    test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags))
 			afs_edit_dir_remove(new_dvnode, &new_dentry->d_name,
-					    afs_edit_dir_for_rename);
+					    afs_edit_dir_for_rename_1);
 
 		if (test_bit(AFS_VNODE_DIR_VALID, &new_dvnode->flags))
 			afs_edit_dir_add(new_dvnode, &new_dentry->d_name,
-					 &vnode->fid,  afs_edit_dir_for_rename);
+					 &vnode->fid, afs_edit_dir_for_rename_2);
+
+		new_inode = d_inode(new_dentry);
+		if (new_inode) {
+			spin_lock(&new_inode->i_lock);
+			if (new_inode->i_nlink > 0)
+				drop_nlink(new_inode);
+			spin_unlock(&new_inode->i_lock);
+		}
+		d_move(old_dentry, new_dentry);
+		goto error_tmp;
 	}
 
-error_key:
+error_rehash:
+	if (rehash)
+		d_rehash(rehash);
+error_tmp:
+	if (tmp)
+		dput(tmp);
 	key_put(key);
+error_scb:
+	kfree(scb);
 error:
 	_leave(" = %d", ret);
 	return ret;
diff --git a/fs/afs/dir_edit.c b/fs/afs/dir_edit.c
index 8b400f5aead5..d4fbe5f85f1b 100644
--- a/fs/afs/dir_edit.c
+++ b/fs/afs/dir_edit.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS filesystem directory editing
  *
  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/fs/afs/dir_silly.c b/fs/afs/dir_silly.c
new file mode 100644
index 000000000000..361088a5edb9
--- /dev/null
+++ b/fs/afs/dir_silly.c
@@ -0,0 +1,245 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* AFS silly rename handling
+ *
+ * Copyright (C) 2019 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ * - Derived from NFS's sillyrename.
+ */
+
+#include <linux/kernel.h>
+#include <linux/fs.h>
+#include <linux/namei.h>
+#include <linux/fsnotify.h>
+#include "internal.h"
+
+/*
+ * Actually perform the silly rename step.
+ */
+static int afs_do_silly_rename(struct afs_vnode *dvnode, struct afs_vnode *vnode,
+			       struct dentry *old, struct dentry *new,
+			       struct key *key)
+{
+	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
+	int ret = -ERESTARTSYS;
+
+	_enter("%pd,%pd", old, new);
+
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		return -ENOMEM;
+
+	trace_afs_silly_rename(vnode, false);
+	if (afs_begin_vnode_operation(&fc, dvnode, key, true)) {
+		afs_dataversion_t dir_data_version = dvnode->status.data_version + 1;
+
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = afs_calc_vnode_cb_break(dvnode);
+			afs_fs_rename(&fc, old->d_name.name,
+				      dvnode, new->d_name.name,
+				      scb, scb);
+		}
+
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break,
+					&dir_data_version, scb);
+		ret = afs_end_vnode_operation(&fc);
+	}
+
+	if (ret == 0) {
+		spin_lock(&old->d_lock);
+		old->d_flags |= DCACHE_NFSFS_RENAMED;
+		spin_unlock(&old->d_lock);
+		if (dvnode->silly_key != key) {
+			key_put(dvnode->silly_key);
+			dvnode->silly_key = key_get(key);
+		}
+
+		if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
+			afs_edit_dir_remove(dvnode, &old->d_name,
+					    afs_edit_dir_for_silly_0);
+		if (test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
+			afs_edit_dir_add(dvnode, &new->d_name,
+					 &vnode->fid, afs_edit_dir_for_silly_1);
+	}
+
+	kfree(scb);
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/**
+ * afs_sillyrename - Perform a silly-rename of a dentry
+ *
+ * AFS is stateless and the server doesn't know when the client is holding a
+ * file open.  To prevent application problems when a file is unlinked while
+ * it's still open, the client performs a "silly-rename".  That is, it renames
+ * the file to a hidden file in the same directory, and only performs the
+ * unlink once the last reference to it is put.
+ *
+ * The final cleanup is done during dentry_iput.
+ */
+int afs_sillyrename(struct afs_vnode *dvnode, struct afs_vnode *vnode,
+		    struct dentry *dentry, struct key *key)
+{
+	static unsigned int sillycounter;
+	struct dentry *sdentry = NULL;
+	unsigned char silly[16];
+	int ret = -EBUSY;
+
+	_enter("");
+
+	/* We don't allow a dentry to be silly-renamed twice. */
+	if (dentry->d_flags & DCACHE_NFSFS_RENAMED)
+		return -EBUSY;
+
+	sdentry = NULL;
+	do {
+		int slen;
+
+		dput(sdentry);
+		sillycounter++;
+
+		/* Create a silly name.  Note that the ".__afs" prefix is
+		 * understood by the salvager and must not be changed.
+		 */
+		slen = scnprintf(silly, sizeof(silly), ".__afs%04X", sillycounter);
+		sdentry = lookup_one_len(silly, dentry->d_parent, slen);
+
+		/* N.B. Better to return EBUSY here ... it could be dangerous
+		 * to delete the file while it's in use.
+		 */
+		if (IS_ERR(sdentry))
+			goto out;
+	} while (!d_is_negative(sdentry));
+
+	ihold(&vnode->vfs_inode);
+
+	ret = afs_do_silly_rename(dvnode, vnode, dentry, sdentry, key);
+	switch (ret) {
+	case 0:
+		/* The rename succeeded. */
+		d_move(dentry, sdentry);
+		break;
+	case -ERESTARTSYS:
+		/* The result of the rename is unknown. Play it safe by forcing
+		 * a new lookup.
+		 */
+		d_drop(dentry);
+		d_drop(sdentry);
+	}
+
+	iput(&vnode->vfs_inode);
+	dput(sdentry);
+out:
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
+ * Tell the server to remove a sillyrename file.
+ */
+static int afs_do_silly_unlink(struct afs_vnode *dvnode, struct afs_vnode *vnode,
+			       struct dentry *dentry, struct key *key)
+{
+	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
+	int ret = -ERESTARTSYS;
+
+	_enter("");
+
+	scb = kcalloc(2, sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		return -ENOMEM;
+
+	trace_afs_silly_rename(vnode, true);
+	if (afs_begin_vnode_operation(&fc, dvnode, key, false)) {
+		afs_dataversion_t dir_data_version = dvnode->status.data_version + 1;
+
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = afs_calc_vnode_cb_break(dvnode);
+
+			if (test_bit(AFS_SERVER_FL_IS_YFS, &fc.cbi->server->flags) &&
+			    !test_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags)) {
+				yfs_fs_remove_file2(&fc, vnode, dentry->d_name.name,
+						    &scb[0], &scb[1]);
+				if (fc.ac.error != -ECONNABORTED ||
+				    fc.ac.abort_code != RXGEN_OPCODE)
+					continue;
+				set_bit(AFS_SERVER_FL_NO_RM2, &fc.cbi->server->flags);
+			}
+
+			afs_fs_remove(&fc, vnode, dentry->d_name.name, false, &scb[0]);
+		}
+
+		afs_vnode_commit_status(&fc, dvnode, fc.cb_break,
+					&dir_data_version, &scb[0]);
+		ret = afs_end_vnode_operation(&fc);
+		if (ret == 0) {
+			drop_nlink(&vnode->vfs_inode);
+			if (vnode->vfs_inode.i_nlink == 0) {
+				set_bit(AFS_VNODE_DELETED, &vnode->flags);
+				clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
+			}
+		}
+		if (ret == 0 &&
+		    test_bit(AFS_VNODE_DIR_VALID, &dvnode->flags))
+			afs_edit_dir_remove(dvnode, &dentry->d_name,
+					    afs_edit_dir_for_unlink);
+	}
+
+	kfree(scb);
+	_leave(" = %d", ret);
+	return ret;
+}
+
+/*
+ * Remove sillyrename file on iput.
+ */
+int afs_silly_iput(struct dentry *dentry, struct inode *inode)
+{
+	struct afs_vnode *dvnode = AFS_FS_I(d_inode(dentry->d_parent));
+	struct afs_vnode *vnode = AFS_FS_I(inode);
+	struct dentry *alias;
+	int ret;
+
+	DECLARE_WAIT_QUEUE_HEAD_ONSTACK(wq);
+
+	_enter("%p{%pd},%llx", dentry, dentry, vnode->fid.vnode);
+
+	down_read(&dvnode->rmdir_lock);
+
+	alias = d_alloc_parallel(dentry->d_parent, &dentry->d_name, &wq);
+	if (IS_ERR(alias)) {
+		up_read(&dvnode->rmdir_lock);
+		return 0;
+	}
+
+	if (!d_in_lookup(alias)) {
+		/* We raced with lookup...  See if we need to transfer the
+		 * sillyrename information to the aliased dentry.
+		 */
+		ret = 0;
+		spin_lock(&alias->d_lock);
+		if (d_really_is_positive(alias) &&
+		    !(alias->d_flags & DCACHE_NFSFS_RENAMED)) {
+			alias->d_flags |= DCACHE_NFSFS_RENAMED;
+			ret = 1;
+		}
+		spin_unlock(&alias->d_lock);
+		up_read(&dvnode->rmdir_lock);
+		dput(alias);
+		return ret;
+	}
+
+	/* Stop lock-release from complaining. */
+	spin_lock(&vnode->lock);
+	vnode->lock_state = AFS_VNODE_LOCK_DELETED;
+	trace_afs_flock_ev(vnode, NULL, afs_flock_silly_delete, 0);
+	spin_unlock(&vnode->lock);
+
+	afs_do_silly_unlink(dvnode, vnode, dentry, dvnode->silly_key);
+	up_read(&dvnode->rmdir_lock);
+	d_lookup_done(alias);
+	dput(alias);
+	return 1;
+}
diff --git a/fs/afs/dynroot.c b/fs/afs/dynroot.c
index a9ba81ddf154..bcd1bafb0278 100644
--- a/fs/afs/dynroot.c
+++ b/fs/afs/dynroot.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS dynamic root handling
  *
  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/fs.h>
@@ -28,6 +24,7 @@ const struct file_operations afs_dynroot_file_operations = {
 static int afs_probe_cell_name(struct dentry *dentry)
 {
 	struct afs_cell *cell;
+	struct afs_net *net = afs_d2net(dentry);
 	const char *name = dentry->d_name.name;
 	size_t len = dentry->d_name.len;
 	int ret;
@@ -40,13 +37,14 @@ static int afs_probe_cell_name(struct dentry *dentry)
 		len--;
 	}
 
-	cell = afs_lookup_cell_rcu(afs_d2net(dentry), name, len);
+	cell = afs_lookup_cell_rcu(net, name, len);
 	if (!IS_ERR(cell)) {
-		afs_put_cell(afs_d2net(dentry), cell);
+		afs_put_cell(net, cell);
 		return 0;
 	}
 
-	ret = dns_query("afsdb", name, len, "srv=1", NULL, NULL);
+	ret = dns_query(net->net, "afsdb", name, len, "srv=1",
+			NULL, NULL, false);
 	if (ret == -ENODATA)
 		ret = -EDESTADDRREQ;
 	return ret;
@@ -261,8 +259,7 @@ int afs_dynroot_populate(struct super_block *sb)
 	struct afs_net *net = afs_sb2net(sb);
 	int ret;
 
-	if (mutex_lock_interruptible(&net->proc_cells_lock) < 0)
-		return -ERESTARTSYS;
+	mutex_lock(&net->proc_cells_lock);
 
 	net->dynroot_sb = sb;
 	hlist_for_each_entry(cell, &net->proc_cells, proc_link) {
diff --git a/fs/afs/file.c b/fs/afs/file.c
index 323ae9912203..56b69576274d 100644
--- a/fs/afs/file.c
+++ b/fs/afs/file.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS filesystem file handling
  *
  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -170,11 +166,12 @@ int afs_release(struct inode *inode, struct file *file)
 {
 	struct afs_vnode *vnode = AFS_FS_I(inode);
 	struct afs_file *af = file->private_data;
+	int ret = 0;
 
 	_enter("{%llx:%llu},", vnode->fid.vid, vnode->fid.vnode);
 
 	if ((file->f_mode & FMODE_WRITE))
-		return vfs_fsync(file, 0);
+		ret = vfs_fsync(file, 0);
 
 	file->private_data = NULL;
 	if (af->wb)
@@ -182,8 +179,8 @@ int afs_release(struct inode *inode, struct file *file)
 	key_put(af->key);
 	kfree(af);
 	afs_prune_wb_keys(vnode);
-	_leave(" = 0");
-	return 0;
+	_leave(" = %d", ret);
+	return ret;
 }
 
 /*
@@ -227,6 +224,7 @@ static void afs_file_readpage_read_complete(struct page *page,
 int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *desc)
 {
 	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
 	int ret;
 
 	_enter("%s{%llx:%llu.%u},%x,,,",
@@ -236,15 +234,22 @@ int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *de
 	       vnode->fid.unique,
 	       key_serial(key));
 
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		return -ENOMEM;
+
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, vnode, key)) {
+	if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
+		afs_dataversion_t data_version = vnode->status.data_version;
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(vnode);
-			afs_fs_fetch_data(&fc, desc);
+			afs_fs_fetch_data(&fc, scb, desc);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+		afs_check_for_remote_deletion(&fc, vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break,
+					&data_version, scb);
 		ret = afs_end_vnode_operation(&fc);
 	}
 
@@ -254,6 +259,7 @@ int afs_fetch_data(struct afs_vnode *vnode, struct key *key, struct afs_read *de
 				&afs_v2net(vnode)->n_fetch_bytes);
 	}
 
+	kfree(scb);
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -300,10 +306,11 @@ int afs_page_filler(void *data, struct page *page)
 		/* page will not be cached */
 	case -ENOBUFS:
 		_debug("cache said ENOBUFS");
+
+		/* fall through */
 	default:
 	go_on:
-		req = kzalloc(sizeof(struct afs_read) + sizeof(struct page *),
-			      GFP_KERNEL);
+		req = kzalloc(struct_size(req, array, 1), GFP_KERNEL);
 		if (!req)
 			goto enomem;
 
@@ -402,10 +409,10 @@ static int afs_readpage(struct file *file, struct page *page)
 /*
  * Make pages available as they're filled.
  */
-static void afs_readpages_page_done(struct afs_call *call, struct afs_read *req)
+static void afs_readpages_page_done(struct afs_read *req)
 {
 #ifdef CONFIG_AFS_FSCACHE
-	struct afs_vnode *vnode = call->reply[0];
+	struct afs_vnode *vnode = req->vnode;
 #endif
 	struct page *page = req->pages[req->index];
 
@@ -453,12 +460,12 @@ static int afs_readpages_one(struct file *file, struct address_space *mapping,
 		n++;
 	}
 
-	req = kzalloc(sizeof(struct afs_read) + sizeof(struct page *) * n,
-		      GFP_NOFS);
+	req = kzalloc(struct_size(req, array, n), GFP_NOFS);
 	if (!req)
 		return -ENOMEM;
 
 	refcount_set(&req->usage, 1);
+	req->vnode = vnode;
 	req->page_done = afs_readpages_page_done;
 	req->pos = first->index;
 	req->pos <<= PAGE_SHIFT;
diff --git a/fs/afs/flock.c b/fs/afs/flock.c
index e432bd27a2e7..d5e5a6ddc847 100644
--- a/fs/afs/flock.c
+++ b/fs/afs/flock.c
@@ -1,21 +1,19 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS file locking support
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include "internal.h"
 
 #define AFS_LOCK_GRANTED	0
 #define AFS_LOCK_PENDING	1
+#define AFS_LOCK_YOUR_TRY	2
 
 struct workqueue_struct *afs_lock_manager;
 
+static void afs_next_locker(struct afs_vnode *vnode, int error);
 static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl);
 static void afs_fl_release_private(struct file_lock *fl);
 
@@ -24,6 +22,14 @@ static const struct file_lock_operations afs_lock_ops = {
 	.fl_release_private	= afs_fl_release_private,
 };
 
+static inline void afs_set_lock_state(struct afs_vnode *vnode, enum afs_lock_state state)
+{
+	_debug("STATE %u -> %u", vnode->lock_state, state);
+	vnode->lock_state = state;
+}
+
+static atomic_t afs_file_lock_debug_id;
+
 /*
  * if the callback is broken on this vnode, then the lock may now be available
  */
@@ -31,7 +37,11 @@ void afs_lock_may_be_available(struct afs_vnode *vnode)
 {
 	_enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
 
-	queue_delayed_work(afs_lock_manager, &vnode->lock_work, 0);
+	spin_lock(&vnode->lock);
+	if (vnode->lock_state == AFS_VNODE_LOCK_WAITING_FOR_CB)
+		afs_next_locker(vnode, 0);
+	trace_afs_flock_ev(vnode, NULL, afs_flock_callback_break, 0);
+	spin_unlock(&vnode->lock);
 }
 
 /*
@@ -40,8 +50,35 @@ void afs_lock_may_be_available(struct afs_vnode *vnode)
  */
 static void afs_schedule_lock_extension(struct afs_vnode *vnode)
 {
-	queue_delayed_work(afs_lock_manager, &vnode->lock_work,
-			   AFS_LOCKWAIT * HZ / 2);
+	ktime_t expires_at, now, duration;
+	u64 duration_j;
+
+	expires_at = ktime_add_ms(vnode->locked_at, AFS_LOCKWAIT * 1000 / 2);
+	now = ktime_get_real();
+	duration = ktime_sub(expires_at, now);
+	if (duration <= 0)
+		duration_j = 0;
+	else
+		duration_j = nsecs_to_jiffies(ktime_to_ns(duration));
+
+	queue_delayed_work(afs_lock_manager, &vnode->lock_work, duration_j);
+}
+
+/*
+ * In the case of successful completion of a lock operation, record the time
+ * the reply appeared and start the lock extension timer.
+ */
+void afs_lock_op_done(struct afs_call *call)
+{
+	struct afs_vnode *vnode = call->lvnode;
+
+	if (call->error == 0) {
+		spin_lock(&vnode->lock);
+		trace_afs_flock_ev(vnode, NULL, afs_flock_timestamp, 0);
+		vnode->locked_at = call->reply_time;
+		afs_schedule_lock_extension(vnode);
+		spin_unlock(&vnode->lock);
+	}
 }
 
 /*
@@ -49,22 +86,90 @@ static void afs_schedule_lock_extension(struct afs_vnode *vnode)
  * first lock in the queue is itself a readlock)
  * - the caller must hold the vnode lock
  */
-static void afs_grant_locks(struct afs_vnode *vnode, struct file_lock *fl)
+static void afs_grant_locks(struct afs_vnode *vnode)
 {
 	struct file_lock *p, *_p;
+	bool exclusive = (vnode->lock_type == AFS_LOCK_WRITE);
 
-	list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);
-	if (fl->fl_type == F_RDLCK) {
-		list_for_each_entry_safe(p, _p, &vnode->pending_locks,
-					 fl_u.afs.link) {
-			if (p->fl_type == F_RDLCK) {
-				p->fl_u.afs.state = AFS_LOCK_GRANTED;
-				list_move_tail(&p->fl_u.afs.link,
-					       &vnode->granted_locks);
-				wake_up(&p->fl_wait);
-			}
+	list_for_each_entry_safe(p, _p, &vnode->pending_locks, fl_u.afs.link) {
+		if (!exclusive && p->fl_type == F_WRLCK)
+			continue;
+
+		list_move_tail(&p->fl_u.afs.link, &vnode->granted_locks);
+		p->fl_u.afs.state = AFS_LOCK_GRANTED;
+		trace_afs_flock_op(vnode, p, afs_flock_op_grant);
+		wake_up(&p->fl_wait);
+	}
+}
+
+/*
+ * If an error is specified, reject every pending lock that matches the
+ * authentication and type of the lock we failed to get.  If there are any
+ * remaining lockers, try to wake up one of them to have a go.
+ */
+static void afs_next_locker(struct afs_vnode *vnode, int error)
+{
+	struct file_lock *p, *_p, *next = NULL;
+	struct key *key = vnode->lock_key;
+	unsigned int fl_type = F_RDLCK;
+
+	_enter("");
+
+	if (vnode->lock_type == AFS_LOCK_WRITE)
+		fl_type = F_WRLCK;
+
+	list_for_each_entry_safe(p, _p, &vnode->pending_locks, fl_u.afs.link) {
+		if (error &&
+		    p->fl_type == fl_type &&
+		    afs_file_key(p->fl_file) == key) {
+			list_del_init(&p->fl_u.afs.link);
+			p->fl_u.afs.state = error;
+			wake_up(&p->fl_wait);
 		}
+
+		/* Select the next locker to hand off to. */
+		if (next &&
+		    (next->fl_type == F_WRLCK || p->fl_type == F_RDLCK))
+			continue;
+		next = p;
+	}
+
+	vnode->lock_key = NULL;
+	key_put(key);
+
+	if (next) {
+		afs_set_lock_state(vnode, AFS_VNODE_LOCK_SETTING);
+		next->fl_u.afs.state = AFS_LOCK_YOUR_TRY;
+		trace_afs_flock_op(vnode, next, afs_flock_op_wake);
+		wake_up(&next->fl_wait);
+	} else {
+		afs_set_lock_state(vnode, AFS_VNODE_LOCK_NONE);
+		trace_afs_flock_ev(vnode, NULL, afs_flock_no_lockers, 0);
 	}
+
+	_leave("");
+}
+
+/*
+ * Kill off all waiters in the the pending lock queue due to the vnode being
+ * deleted.
+ */
+static void afs_kill_lockers_enoent(struct afs_vnode *vnode)
+{
+	struct file_lock *p;
+
+	afs_set_lock_state(vnode, AFS_VNODE_LOCK_DELETED);
+
+	while (!list_empty(&vnode->pending_locks)) {
+		p = list_entry(vnode->pending_locks.next,
+			       struct file_lock, fl_u.afs.link);
+		list_del_init(&p->fl_u.afs.link);
+		p->fl_u.afs.state = -ENOENT;
+		wake_up(&p->fl_wait);
+	}
+
+	key_put(vnode->lock_key);
+	vnode->lock_key = NULL;
 }
 
 /*
@@ -73,6 +178,7 @@ static void afs_grant_locks(struct afs_vnode *vnode, struct file_lock *fl)
 static int afs_set_lock(struct afs_vnode *vnode, struct key *key,
 			afs_lock_type_t type)
 {
+	struct afs_status_cb *scb;
 	struct afs_fs_cursor fc;
 	int ret;
 
@@ -83,18 +189,23 @@ static int afs_set_lock(struct afs_vnode *vnode, struct key *key,
 	       vnode->fid.unique,
 	       key_serial(key), type);
 
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		return -ENOMEM;
+
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, vnode, key)) {
+	if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(vnode);
-			afs_fs_set_lock(&fc, type);
+			afs_fs_set_lock(&fc, type, scb);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+		afs_check_for_remote_deletion(&fc, vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break, NULL, scb);
 		ret = afs_end_vnode_operation(&fc);
 	}
 
+	kfree(scb);
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -104,6 +215,7 @@ static int afs_set_lock(struct afs_vnode *vnode, struct key *key,
  */
 static int afs_extend_lock(struct afs_vnode *vnode, struct key *key)
 {
+	struct afs_status_cb *scb;
 	struct afs_fs_cursor fc;
 	int ret;
 
@@ -114,18 +226,23 @@ static int afs_extend_lock(struct afs_vnode *vnode, struct key *key)
 	       vnode->fid.unique,
 	       key_serial(key));
 
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		return -ENOMEM;
+
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, vnode, key)) {
+	if (afs_begin_vnode_operation(&fc, vnode, key, false)) {
 		while (afs_select_current_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(vnode);
-			afs_fs_extend_lock(&fc);
+			afs_fs_extend_lock(&fc, scb);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+		afs_check_for_remote_deletion(&fc, vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break, NULL, scb);
 		ret = afs_end_vnode_operation(&fc);
 	}
 
+	kfree(scb);
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -135,6 +252,7 @@ static int afs_extend_lock(struct afs_vnode *vnode, struct key *key)
  */
 static int afs_release_lock(struct afs_vnode *vnode, struct key *key)
 {
+	struct afs_status_cb *scb;
 	struct afs_fs_cursor fc;
 	int ret;
 
@@ -145,18 +263,23 @@ static int afs_release_lock(struct afs_vnode *vnode, struct key *key)
 	       vnode->fid.unique,
 	       key_serial(key));
 
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		return -ENOMEM;
+
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, vnode, key)) {
+	if (afs_begin_vnode_operation(&fc, vnode, key, false)) {
 		while (afs_select_current_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(vnode);
-			afs_fs_release_lock(&fc);
+			afs_fs_release_lock(&fc, scb);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+		afs_check_for_remote_deletion(&fc, vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break, NULL, scb);
 		ret = afs_end_vnode_operation(&fc);
 	}
 
+	kfree(scb);
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -170,8 +293,6 @@ void afs_lock_work(struct work_struct *work)
 {
 	struct afs_vnode *vnode =
 		container_of(work, struct afs_vnode, lock_work.work);
-	struct file_lock *fl, *next;
-	afs_lock_type_t type;
 	struct key *key;
 	int ret;
 
@@ -183,35 +304,28 @@ again:
 	_debug("wstate %u for %p", vnode->lock_state, vnode);
 	switch (vnode->lock_state) {
 	case AFS_VNODE_LOCK_NEED_UNLOCK:
-		_debug("unlock");
-		vnode->lock_state = AFS_VNODE_LOCK_UNLOCKING;
+		afs_set_lock_state(vnode, AFS_VNODE_LOCK_UNLOCKING);
+		trace_afs_flock_ev(vnode, NULL, afs_flock_work_unlocking, 0);
 		spin_unlock(&vnode->lock);
 
 		/* attempt to release the server lock; if it fails, we just
 		 * wait 5 minutes and it'll expire anyway */
 		ret = afs_release_lock(vnode, vnode->lock_key);
-		if (ret < 0)
+		if (ret < 0 && vnode->lock_state != AFS_VNODE_LOCK_DELETED) {
+			trace_afs_flock_ev(vnode, NULL, afs_flock_release_fail,
+					   ret);
 			printk(KERN_WARNING "AFS:"
 			       " Failed to release lock on {%llx:%llx} error %d\n",
 			       vnode->fid.vid, vnode->fid.vnode, ret);
-
-		spin_lock(&vnode->lock);
-		key_put(vnode->lock_key);
-		vnode->lock_key = NULL;
-		vnode->lock_state = AFS_VNODE_LOCK_NONE;
-
-		if (list_empty(&vnode->pending_locks)) {
-			spin_unlock(&vnode->lock);
-			return;
 		}
 
-		/* The new front of the queue now owns the state variables. */
-		next = list_entry(vnode->pending_locks.next,
-				  struct file_lock, fl_u.afs.link);
-		vnode->lock_key = key_get(afs_file_key(next->fl_file));
-		vnode->lock_type = (next->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
-		vnode->lock_state = AFS_VNODE_LOCK_WAITING_FOR_CB;
-		goto again;
+		spin_lock(&vnode->lock);
+		if (ret == -ENOENT)
+			afs_kill_lockers_enoent(vnode);
+		else
+			afs_next_locker(vnode, 0);
+		spin_unlock(&vnode->lock);
+		return;
 
 	/* If we've already got a lock, then it must be time to extend that
 	 * lock as AFS locks time out after 5 minutes.
@@ -222,87 +336,57 @@ again:
 		ASSERT(!list_empty(&vnode->granted_locks));
 
 		key = key_get(vnode->lock_key);
-		vnode->lock_state = AFS_VNODE_LOCK_EXTENDING;
+		afs_set_lock_state(vnode, AFS_VNODE_LOCK_EXTENDING);
+		trace_afs_flock_ev(vnode, NULL, afs_flock_work_extending, 0);
 		spin_unlock(&vnode->lock);
 
 		ret = afs_extend_lock(vnode, key); /* RPC */
 		key_put(key);
 
-		if (ret < 0)
+		if (ret < 0) {
+			trace_afs_flock_ev(vnode, NULL, afs_flock_extend_fail,
+					   ret);
 			pr_warning("AFS: Failed to extend lock on {%llx:%llx} error %d\n",
 				   vnode->fid.vid, vnode->fid.vnode, ret);
+		}
 
 		spin_lock(&vnode->lock);
 
+		if (ret == -ENOENT) {
+			afs_kill_lockers_enoent(vnode);
+			spin_unlock(&vnode->lock);
+			return;
+		}
+
 		if (vnode->lock_state != AFS_VNODE_LOCK_EXTENDING)
 			goto again;
-		vnode->lock_state = AFS_VNODE_LOCK_GRANTED;
+		afs_set_lock_state(vnode, AFS_VNODE_LOCK_GRANTED);
 
-		if (ret == 0)
-			afs_schedule_lock_extension(vnode);
-		else
+		if (ret != 0)
 			queue_delayed_work(afs_lock_manager, &vnode->lock_work,
 					   HZ * 10);
 		spin_unlock(&vnode->lock);
 		_leave(" [ext]");
 		return;
 
-		/* If we don't have a granted lock, then we must've been called
-		 * back by the server, and so if might be possible to get a
-		 * lock we're currently waiting for.
-		 */
+	/* If we're waiting for a callback to indicate lock release, we can't
+	 * actually rely on this, so need to recheck at regular intervals.  The
+	 * problem is that the server might not notify us if the lock just
+	 * expires (say because a client died) rather than being explicitly
+	 * released.
+	 */
 	case AFS_VNODE_LOCK_WAITING_FOR_CB:
-		_debug("get");
-
-		key = key_get(vnode->lock_key);
-		type = vnode->lock_type;
-		vnode->lock_state = AFS_VNODE_LOCK_SETTING;
+		_debug("retry");
+		afs_next_locker(vnode, 0);
 		spin_unlock(&vnode->lock);
+		return;
 
-		ret = afs_set_lock(vnode, key, type); /* RPC */
-		key_put(key);
-
-		spin_lock(&vnode->lock);
-		switch (ret) {
-		case -EWOULDBLOCK:
-			_debug("blocked");
-			break;
-		case 0:
-			_debug("acquired");
-			vnode->lock_state = AFS_VNODE_LOCK_GRANTED;
-			/* Fall through */
-		default:
-			/* Pass the lock or the error onto the first locker in
-			 * the list - if they're looking for this type of lock.
-			 * If they're not, we assume that whoever asked for it
-			 * took a signal.
-			 */
-			if (list_empty(&vnode->pending_locks)) {
-				_debug("withdrawn");
-				vnode->lock_state = AFS_VNODE_LOCK_NEED_UNLOCK;
-				goto again;
-			}
-
-			fl = list_entry(vnode->pending_locks.next,
-					struct file_lock, fl_u.afs.link);
-			type = (fl->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
-			if (vnode->lock_type != type) {
-				_debug("changed");
-				vnode->lock_state = AFS_VNODE_LOCK_NEED_UNLOCK;
-				goto again;
-			}
-
-			fl->fl_u.afs.state = ret;
-			if (ret == 0)
-				afs_grant_locks(vnode, fl);
-			else
-				list_del_init(&fl->fl_u.afs.link);
-			wake_up(&fl->fl_wait);
-			spin_unlock(&vnode->lock);
-			_leave(" [granted]");
-			return;
-		}
+	case AFS_VNODE_LOCK_DELETED:
+		afs_kill_lockers_enoent(vnode);
+		spin_unlock(&vnode->lock);
+		return;
 
+		/* Fall through */
 	default:
 		/* Looks like a lock request was withdrawn. */
 		spin_unlock(&vnode->lock);
@@ -319,14 +403,16 @@ again:
  */
 static void afs_defer_unlock(struct afs_vnode *vnode)
 {
-	_enter("");
+	_enter("%u", vnode->lock_state);
 
-	if (vnode->lock_state == AFS_VNODE_LOCK_GRANTED ||
-	    vnode->lock_state == AFS_VNODE_LOCK_EXTENDING) {
+	if (list_empty(&vnode->granted_locks) &&
+	    (vnode->lock_state == AFS_VNODE_LOCK_GRANTED ||
+	     vnode->lock_state == AFS_VNODE_LOCK_EXTENDING)) {
 		cancel_delayed_work(&vnode->lock_work);
 
-		vnode->lock_state = AFS_VNODE_LOCK_NEED_UNLOCK;
-		afs_lock_may_be_available(vnode);
+		afs_set_lock_state(vnode, AFS_VNODE_LOCK_NEED_UNLOCK);
+		trace_afs_flock_ev(vnode, NULL, afs_flock_defer_unlock, 0);
+		queue_delayed_work(afs_lock_manager, &vnode->lock_work, 0);
 	}
 }
 
@@ -335,7 +421,7 @@ static void afs_defer_unlock(struct afs_vnode *vnode)
  * whether we think that we have a locking permit.
  */
 static int afs_do_setlk_check(struct afs_vnode *vnode, struct key *key,
-			      afs_lock_type_t type, bool can_sleep)
+			      enum afs_flock_mode mode, afs_lock_type_t type)
 {
 	afs_access_t access;
 	int ret;
@@ -363,160 +449,177 @@ static int afs_do_setlk_check(struct afs_vnode *vnode, struct key *key,
 	if (type == AFS_LOCK_READ) {
 		if (!(access & (AFS_ACE_INSERT | AFS_ACE_WRITE | AFS_ACE_LOCK)))
 			return -EACCES;
-		if (vnode->status.lock_count == -1 && !can_sleep)
-			return -EAGAIN; /* Write locked */
 	} else {
 		if (!(access & (AFS_ACE_INSERT | AFS_ACE_WRITE)))
 			return -EACCES;
-		if (vnode->status.lock_count != 0 && !can_sleep)
-			return -EAGAIN; /* Locked */
 	}
 
 	return 0;
 }
 
 /*
- * Remove the front runner from the pending queue.
- * - The caller must hold vnode->lock.
- */
-static void afs_dequeue_lock(struct afs_vnode *vnode, struct file_lock *fl)
-{
-	struct file_lock *next;
-
-	_enter("");
-
-	/* ->lock_type, ->lock_key and ->lock_state only belong to this
-	 * file_lock if we're at the front of the pending queue or if we have
-	 * the lock granted or if the lock_state is NEED_UNLOCK or UNLOCKING.
-	 */
-	if (vnode->granted_locks.next == &fl->fl_u.afs.link &&
-	    vnode->granted_locks.prev == &fl->fl_u.afs.link) {
-		list_del_init(&fl->fl_u.afs.link);
-		afs_defer_unlock(vnode);
-		return;
-	}
-
-	if (!list_empty(&vnode->granted_locks) ||
-	    vnode->pending_locks.next != &fl->fl_u.afs.link) {
-		list_del_init(&fl->fl_u.afs.link);
-		return;
-	}
-
-	list_del_init(&fl->fl_u.afs.link);
-	key_put(vnode->lock_key);
-	vnode->lock_key = NULL;
-	vnode->lock_state = AFS_VNODE_LOCK_NONE;
-
-	if (list_empty(&vnode->pending_locks))
-		return;
-
-	/* The new front of the queue now owns the state variables. */
-	next = list_entry(vnode->pending_locks.next,
-			  struct file_lock, fl_u.afs.link);
-	vnode->lock_key = key_get(afs_file_key(next->fl_file));
-	vnode->lock_type = (next->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
-	vnode->lock_state = AFS_VNODE_LOCK_WAITING_FOR_CB;
-	afs_lock_may_be_available(vnode);
-}
-
-/*
  * request a lock on a file on the server
  */
 static int afs_do_setlk(struct file *file, struct file_lock *fl)
 {
 	struct inode *inode = locks_inode(file);
 	struct afs_vnode *vnode = AFS_FS_I(inode);
+	enum afs_flock_mode mode = AFS_FS_S(inode->i_sb)->flock_mode;
 	afs_lock_type_t type;
 	struct key *key = afs_file_key(file);
+	bool partial, no_server_lock = false;
 	int ret;
 
-	_enter("{%llx:%llu},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);
+	if (mode == afs_flock_mode_unset)
+		mode = afs_flock_mode_openafs;
 
-	/* only whole-file locks are supported */
-	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)
-		return -EINVAL;
+	_enter("{%llx:%llu},%llu-%llu,%u,%u",
+	       vnode->fid.vid, vnode->fid.vnode,
+	       fl->fl_start, fl->fl_end, fl->fl_type, mode);
 
 	fl->fl_ops = &afs_lock_ops;
 	INIT_LIST_HEAD(&fl->fl_u.afs.link);
 	fl->fl_u.afs.state = AFS_LOCK_PENDING;
 
+	partial = (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX);
 	type = (fl->fl_type == F_RDLCK) ? AFS_LOCK_READ : AFS_LOCK_WRITE;
+	if (mode == afs_flock_mode_write && partial)
+		type = AFS_LOCK_WRITE;
 
-	ret = afs_do_setlk_check(vnode, key, type, fl->fl_flags & FL_SLEEP);
+	ret = afs_do_setlk_check(vnode, key, mode, type);
 	if (ret < 0)
 		return ret;
 
-	spin_lock(&vnode->lock);
+	trace_afs_flock_op(vnode, fl, afs_flock_op_set_lock);
 
-	/* If we've already got a readlock on the server then we instantly
-	 * grant another readlock, irrespective of whether there are any
-	 * pending writelocks.
+	/* AFS3 protocol only supports full-file locks and doesn't provide any
+	 * method of upgrade/downgrade, so we need to emulate for partial-file
+	 * locks.
+	 *
+	 * The OpenAFS client only gets a server lock for a full-file lock and
+	 * keeps partial-file locks local.  Allow this behaviour to be emulated
+	 * (as the default).
 	 */
-	if (type == AFS_LOCK_READ &&
-	    vnode->lock_state == AFS_VNODE_LOCK_GRANTED &&
-	    vnode->lock_type == AFS_LOCK_READ) {
-		_debug("instant readlock");
-		ASSERT(!list_empty(&vnode->granted_locks));
-		goto share_existing_lock;
+	if (mode == afs_flock_mode_local ||
+	    (partial && mode == afs_flock_mode_openafs)) {
+		no_server_lock = true;
+		goto skip_server_lock;
 	}
 
+	spin_lock(&vnode->lock);
 	list_add_tail(&fl->fl_u.afs.link, &vnode->pending_locks);
 
+	ret = -ENOENT;
+	if (vnode->lock_state == AFS_VNODE_LOCK_DELETED)
+		goto error_unlock;
+
+	/* If we've already got a lock on the server then try to move to having
+	 * the VFS grant the requested lock.  Note that this means that other
+	 * clients may get starved out.
+	 */
+	_debug("try %u", vnode->lock_state);
+	if (vnode->lock_state == AFS_VNODE_LOCK_GRANTED) {
+		if (type == AFS_LOCK_READ) {
+			_debug("instant readlock");
+			list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);
+			fl->fl_u.afs.state = AFS_LOCK_GRANTED;
+			goto vnode_is_locked_u;
+		}
+
+		if (vnode->lock_type == AFS_LOCK_WRITE) {
+			_debug("instant writelock");
+			list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);
+			fl->fl_u.afs.state = AFS_LOCK_GRANTED;
+			goto vnode_is_locked_u;
+		}
+	}
+
+	if (vnode->lock_state == AFS_VNODE_LOCK_NONE &&
+	    !(fl->fl_flags & FL_SLEEP)) {
+		ret = -EAGAIN;
+		if (type == AFS_LOCK_READ) {
+			if (vnode->status.lock_count == -1)
+				goto lock_is_contended; /* Write locked */
+		} else {
+			if (vnode->status.lock_count != 0)
+				goto lock_is_contended; /* Locked */
+		}
+	}
+
 	if (vnode->lock_state != AFS_VNODE_LOCK_NONE)
 		goto need_to_wait;
 
+try_to_lock:
 	/* We don't have a lock on this vnode and we aren't currently waiting
 	 * for one either, so ask the server for a lock.
 	 *
 	 * Note that we need to be careful if we get interrupted by a signal
 	 * after dispatching the request as we may still get the lock, even
 	 * though we don't wait for the reply (it's not too bad a problem - the
-	 * lock will expire in 10 mins anyway).
+	 * lock will expire in 5 mins anyway).
 	 */
-	_debug("not locked");
+	trace_afs_flock_ev(vnode, fl, afs_flock_try_to_lock, 0);
 	vnode->lock_key = key_get(key);
 	vnode->lock_type = type;
-	vnode->lock_state = AFS_VNODE_LOCK_SETTING;
+	afs_set_lock_state(vnode, AFS_VNODE_LOCK_SETTING);
 	spin_unlock(&vnode->lock);
 
 	ret = afs_set_lock(vnode, key, type); /* RPC */
 
 	spin_lock(&vnode->lock);
 	switch (ret) {
+	case -EKEYREJECTED:
+	case -EKEYEXPIRED:
+	case -EKEYREVOKED:
+	case -EPERM:
+	case -EACCES:
+		fl->fl_u.afs.state = ret;
+		trace_afs_flock_ev(vnode, fl, afs_flock_fail_perm, ret);
+		list_del_init(&fl->fl_u.afs.link);
+		afs_next_locker(vnode, ret);
+		goto error_unlock;
+
+	case -ENOENT:
+		fl->fl_u.afs.state = ret;
+		trace_afs_flock_ev(vnode, fl, afs_flock_fail_other, ret);
+		list_del_init(&fl->fl_u.afs.link);
+		afs_kill_lockers_enoent(vnode);
+		goto error_unlock;
+
 	default:
-		goto abort_attempt;
+		fl->fl_u.afs.state = ret;
+		trace_afs_flock_ev(vnode, fl, afs_flock_fail_other, ret);
+		list_del_init(&fl->fl_u.afs.link);
+		afs_next_locker(vnode, 0);
+		goto error_unlock;
 
 	case -EWOULDBLOCK:
 		/* The server doesn't have a lock-waiting queue, so the client
 		 * will have to retry.  The server will break the outstanding
 		 * callbacks on a file when a lock is released.
 		 */
-		_debug("would block");
 		ASSERT(list_empty(&vnode->granted_locks));
 		ASSERTCMP(vnode->pending_locks.next, ==, &fl->fl_u.afs.link);
-		vnode->lock_state = AFS_VNODE_LOCK_WAITING_FOR_CB;
-		goto need_to_wait;
+		goto lock_is_contended;
 
 	case 0:
-		_debug("acquired");
-		break;
+		afs_set_lock_state(vnode, AFS_VNODE_LOCK_GRANTED);
+		trace_afs_flock_ev(vnode, fl, afs_flock_acquired, type);
+		afs_grant_locks(vnode);
+		goto vnode_is_locked_u;
 	}
 
-	/* we've acquired a server lock, but it needs to be renewed after 5
-	 * mins */
-	vnode->lock_state = AFS_VNODE_LOCK_GRANTED;
-	afs_schedule_lock_extension(vnode);
-
-share_existing_lock:
-	/* the lock has been granted as far as we're concerned... */
-	fl->fl_u.afs.state = AFS_LOCK_GRANTED;
-	list_move_tail(&fl->fl_u.afs.link, &vnode->granted_locks);
-
-given_lock:
-	/* ... but we do still need to get the VFS's blessing */
+vnode_is_locked_u:
 	spin_unlock(&vnode->lock);
-
-	ret = posix_lock_file(file, fl, NULL);
+vnode_is_locked:
+	/* the lock has been granted by the server... */
+	ASSERTCMP(fl->fl_u.afs.state, ==, AFS_LOCK_GRANTED);
+
+skip_server_lock:
+	/* ... but the VFS still needs to distribute access on this client. */
+	trace_afs_flock_ev(vnode, fl, afs_flock_vfs_locking, 0);
+	ret = locks_lock_file_wait(file, fl);
+	trace_afs_flock_ev(vnode, fl, afs_flock_vfs_lock, ret);
 	if (ret < 0)
 		goto vfs_rejected_lock;
 
@@ -528,38 +631,62 @@ given_lock:
 	_leave(" = 0");
 	return 0;
 
+lock_is_contended:
+	if (!(fl->fl_flags & FL_SLEEP)) {
+		list_del_init(&fl->fl_u.afs.link);
+		afs_next_locker(vnode, 0);
+		ret = -EAGAIN;
+		goto error_unlock;
+	}
+
+	afs_set_lock_state(vnode, AFS_VNODE_LOCK_WAITING_FOR_CB);
+	trace_afs_flock_ev(vnode, fl, afs_flock_would_block, ret);
+	queue_delayed_work(afs_lock_manager, &vnode->lock_work, HZ * 5);
+
 need_to_wait:
 	/* We're going to have to wait.  Either this client doesn't have a lock
 	 * on the server yet and we need to wait for a callback to occur, or
-	 * the client does have a lock on the server, but it belongs to some
-	 * other process(es) and is incompatible with the lock we want.
+	 * the client does have a lock on the server, but it's shared and we
+	 * need an exclusive lock.
 	 */
-	ret = -EAGAIN;
-	if (fl->fl_flags & FL_SLEEP) {
-		spin_unlock(&vnode->lock);
+	spin_unlock(&vnode->lock);
 
-		_debug("sleep");
-		ret = wait_event_interruptible(fl->fl_wait,
-					       fl->fl_u.afs.state != AFS_LOCK_PENDING);
+	trace_afs_flock_ev(vnode, fl, afs_flock_waiting, 0);
+	ret = wait_event_interruptible(fl->fl_wait,
+				       fl->fl_u.afs.state != AFS_LOCK_PENDING);
+	trace_afs_flock_ev(vnode, fl, afs_flock_waited, ret);
 
+	if (fl->fl_u.afs.state >= 0 && fl->fl_u.afs.state != AFS_LOCK_GRANTED) {
 		spin_lock(&vnode->lock);
-	}
 
-	if (fl->fl_u.afs.state == AFS_LOCK_GRANTED)
-		goto given_lock;
-	if (fl->fl_u.afs.state < 0)
-		ret = fl->fl_u.afs.state;
+		switch (fl->fl_u.afs.state) {
+		case AFS_LOCK_YOUR_TRY:
+			fl->fl_u.afs.state = AFS_LOCK_PENDING;
+			goto try_to_lock;
+		case AFS_LOCK_PENDING:
+			if (ret > 0) {
+				/* We need to retry the lock.  We may not be
+				 * notified by the server if it just expired
+				 * rather than being released.
+				 */
+				ASSERTCMP(vnode->lock_state, ==, AFS_VNODE_LOCK_WAITING_FOR_CB);
+				afs_set_lock_state(vnode, AFS_VNODE_LOCK_SETTING);
+				fl->fl_u.afs.state = AFS_LOCK_PENDING;
+				goto try_to_lock;
+			}
+			goto error_unlock;
+		case AFS_LOCK_GRANTED:
+		default:
+			break;
+		}
 
-abort_attempt:
-	/* we aren't going to get the lock, either because we're unwilling to
-	 * wait, or because some signal happened */
-	_debug("abort");
-	afs_dequeue_lock(vnode, fl);
+		spin_unlock(&vnode->lock);
+	}
 
-error_unlock:
-	spin_unlock(&vnode->lock);
-	_leave(" = %d", ret);
-	return ret;
+	if (fl->fl_u.afs.state == AFS_LOCK_GRANTED)
+		goto vnode_is_locked;
+	ret = fl->fl_u.afs.state;
+	goto error;
 
 vfs_rejected_lock:
 	/* The VFS rejected the lock we just obtained, so we have to discard
@@ -567,11 +694,17 @@ vfs_rejected_lock:
 	 * deal with.
 	 */
 	_debug("vfs refused %d", ret);
+	if (no_server_lock)
+		goto error;
 	spin_lock(&vnode->lock);
 	list_del_init(&fl->fl_u.afs.link);
-	if (list_empty(&vnode->granted_locks))
-		afs_defer_unlock(vnode);
-	goto error_unlock;
+	afs_defer_unlock(vnode);
+
+error_unlock:
+	spin_unlock(&vnode->lock);
+error:
+	_leave(" = %d", ret);
+	return ret;
 }
 
 /*
@@ -584,14 +717,12 @@ static int afs_do_unlk(struct file *file, struct file_lock *fl)
 
 	_enter("{%llx:%llu},%u", vnode->fid.vid, vnode->fid.vnode, fl->fl_type);
 
+	trace_afs_flock_op(vnode, fl, afs_flock_op_unlock);
+
 	/* Flush all pending writes before doing anything with locks. */
 	vfs_fsync(file, 0);
 
-	/* only whole-file unlocks are supported */
-	if (fl->fl_start != 0 || fl->fl_end != OFFSET_MAX)
-		return -EINVAL;
-
-	ret = posix_lock_file(file, fl, NULL);
+	ret = locks_lock_file_wait(file, fl);
 	_leave(" = %d [%u]", ret, vnode->lock_state);
 	return ret;
 }
@@ -607,23 +738,29 @@ static int afs_do_getlk(struct file *file, struct file_lock *fl)
 
 	_enter("");
 
+	if (vnode->lock_state == AFS_VNODE_LOCK_DELETED)
+		return -ENOENT;
+
 	fl->fl_type = F_UNLCK;
 
 	/* check local lock records first */
 	posix_test_lock(file, fl);
 	if (fl->fl_type == F_UNLCK) {
 		/* no local locks; consult the server */
-		ret = afs_fetch_status(vnode, key, false);
+		ret = afs_fetch_status(vnode, key, false, NULL);
 		if (ret < 0)
 			goto error;
 
 		lock_count = READ_ONCE(vnode->status.lock_count);
-		if (lock_count > 0)
-			fl->fl_type = F_RDLCK;
-		else
-			fl->fl_type = F_WRLCK;
-		fl->fl_start = 0;
-		fl->fl_end = OFFSET_MAX;
+		if (lock_count != 0) {
+			if (lock_count > 0)
+				fl->fl_type = F_RDLCK;
+			else
+				fl->fl_type = F_WRLCK;
+			fl->fl_start = 0;
+			fl->fl_end = OFFSET_MAX;
+			fl->fl_pid = 0;
+		}
 	}
 
 	ret = 0;
@@ -638,6 +775,8 @@ error:
 int afs_lock(struct file *file, int cmd, struct file_lock *fl)
 {
 	struct afs_vnode *vnode = AFS_FS_I(locks_inode(file));
+	enum afs_flock_operation op;
+	int ret;
 
 	_enter("{%llx:%llu},%d,{t=%x,fl=%x,r=%Ld:%Ld}",
 	       vnode->fid.vid, vnode->fid.vnode, cmd,
@@ -650,9 +789,23 @@ int afs_lock(struct file *file, int cmd, struct file_lock *fl)
 
 	if (IS_GETLK(cmd))
 		return afs_do_getlk(file, fl);
+
+	fl->fl_u.afs.debug_id = atomic_inc_return(&afs_file_lock_debug_id);
+	trace_afs_flock_op(vnode, fl, afs_flock_op_lock);
+
 	if (fl->fl_type == F_UNLCK)
-		return afs_do_unlk(file, fl);
-	return afs_do_setlk(file, fl);
+		ret = afs_do_unlk(file, fl);
+	else
+		ret = afs_do_setlk(file, fl);
+
+	switch (ret) {
+	case 0:		op = afs_flock_op_return_ok; break;
+	case -EAGAIN:	op = afs_flock_op_return_eagain; break;
+	case -EDEADLK:	op = afs_flock_op_return_edeadlk; break;
+	default:	op = afs_flock_op_return_error; break;
+	}
+	trace_afs_flock_op(vnode, fl, op);
+	return ret;
 }
 
 /*
@@ -661,6 +814,8 @@ int afs_lock(struct file *file, int cmd, struct file_lock *fl)
 int afs_flock(struct file *file, int cmd, struct file_lock *fl)
 {
 	struct afs_vnode *vnode = AFS_FS_I(locks_inode(file));
+	enum afs_flock_operation op;
+	int ret;
 
 	_enter("{%llx:%llu},%d,{t=%x,fl=%x}",
 	       vnode->fid.vid, vnode->fid.vnode, cmd,
@@ -676,10 +831,23 @@ int afs_flock(struct file *file, int cmd, struct file_lock *fl)
 	if (!(fl->fl_flags & FL_FLOCK))
 		return -ENOLCK;
 
+	fl->fl_u.afs.debug_id = atomic_inc_return(&afs_file_lock_debug_id);
+	trace_afs_flock_op(vnode, fl, afs_flock_op_flock);
+
 	/* we're simulating flock() locks using posix locks on the server */
 	if (fl->fl_type == F_UNLCK)
-		return afs_do_unlk(file, fl);
-	return afs_do_setlk(file, fl);
+		ret = afs_do_unlk(file, fl);
+	else
+		ret = afs_do_setlk(file, fl);
+
+	switch (ret) {
+	case 0:		op = afs_flock_op_return_ok; break;
+	case -EAGAIN:	op = afs_flock_op_return_eagain; break;
+	case -EDEADLK:	op = afs_flock_op_return_edeadlk; break;
+	default:	op = afs_flock_op_return_error; break;
+	}
+	trace_afs_flock_op(vnode, fl, op);
+	return ret;
 }
 
 /*
@@ -694,7 +862,10 @@ static void afs_fl_copy_lock(struct file_lock *new, struct file_lock *fl)
 
 	_enter("");
 
+	new->fl_u.afs.debug_id = atomic_inc_return(&afs_file_lock_debug_id);
+
 	spin_lock(&vnode->lock);
+	trace_afs_flock_op(vnode, new, afs_flock_op_copy_lock);
 	list_add(&new->fl_u.afs.link, &fl->fl_u.afs.link);
 	spin_unlock(&vnode->lock);
 }
@@ -710,7 +881,12 @@ static void afs_fl_release_private(struct file_lock *fl)
 	_enter("");
 
 	spin_lock(&vnode->lock);
-	afs_dequeue_lock(vnode, fl);
+
+	trace_afs_flock_op(vnode, fl, afs_flock_op_release_lock);
+	list_del_init(&fl->fl_u.afs.link);
+	if (list_empty(&vnode->granted_locks))
+		afs_defer_unlock(vnode);
+
 	_debug("state %u for %p", vnode->lock_state, vnode);
 	spin_unlock(&vnode->lock);
 }
diff --git a/fs/afs/fs_probe.c b/fs/afs/fs_probe.c
index 3a9eaec06756..cfe62b154f68 100644
--- a/fs/afs/fs_probe.c
+++ b/fs/afs/fs_probe.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS fileserver probing
  *
  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/sched.h>
@@ -33,8 +29,8 @@ static bool afs_fs_probe_done(struct afs_server *server)
 void afs_fileserver_probe_result(struct afs_call *call)
 {
 	struct afs_addr_list *alist = call->alist;
-	struct afs_server *server = call->reply[0];
-	unsigned int server_index = (long)call->reply[1];
+	struct afs_server *server = call->server;
+	unsigned int server_index = call->server_index;
 	unsigned int index = call->addr_ix;
 	unsigned int rtt = UINT_MAX;
 	bool have_result = false;
@@ -141,8 +137,8 @@ static int afs_do_probe_fileserver(struct afs_net *net,
 	struct afs_addr_cursor ac = {
 		.index = 0,
 	};
+	struct afs_call *call;
 	bool in_progress = false;
-	int err;
 
 	_enter("%pU", &server->uuid);
 
@@ -156,12 +152,13 @@ static int afs_do_probe_fileserver(struct afs_net *net,
 	server->probe.rtt = UINT_MAX;
 
 	for (ac.index = 0; ac.index < ac.alist->nr_addrs; ac.index++) {
-		err = afs_fs_get_capabilities(net, server, &ac, key, server_index,
-					      true);
-		if (err == -EINPROGRESS)
+		call = afs_fs_get_capabilities(net, server, &ac, key, server_index);
+		if (!IS_ERR(call)) {
+			afs_put_call(call);
 			in_progress = true;
-		else
-			afs_prioritise_error(_e, err, ac.abort_code);
+		} else {
+			afs_prioritise_error(_e, PTR_ERR(call), ac.abort_code);
+		}
 	}
 
 	if (!in_progress)
diff --git a/fs/afs/fsclient.c b/fs/afs/fsclient.c
index ca08c83168f5..1ce73e014139 100644
--- a/fs/afs/fsclient.c
+++ b/fs/afs/fsclient.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS File Server client stubs
  *
  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/init.h>
@@ -60,78 +56,17 @@ static void xdr_dump_bad(const __be32 *bp)
 }
 
 /*
- * Update the core inode struct from a returned status record.
- */
-void afs_update_inode_from_status(struct afs_vnode *vnode,
-				  struct afs_file_status *status,
-				  const afs_dataversion_t *expected_version,
-				  u8 flags)
-{
-	struct timespec64 t;
-	umode_t mode;
-
-	t = status->mtime_client;
-	vnode->vfs_inode.i_ctime = t;
-	vnode->vfs_inode.i_mtime = t;
-	vnode->vfs_inode.i_atime = t;
-
-	if (flags & (AFS_VNODE_META_CHANGED | AFS_VNODE_NOT_YET_SET)) {
-		vnode->vfs_inode.i_uid = make_kuid(&init_user_ns, status->owner);
-		vnode->vfs_inode.i_gid = make_kgid(&init_user_ns, status->group);
-		set_nlink(&vnode->vfs_inode, status->nlink);
-
-		mode = vnode->vfs_inode.i_mode;
-		mode &= ~S_IALLUGO;
-		mode |= status->mode;
-		barrier();
-		vnode->vfs_inode.i_mode = mode;
-	}
-
-	if (!(flags & AFS_VNODE_NOT_YET_SET)) {
-		if (expected_version &&
-		    *expected_version != status->data_version) {
-			_debug("vnode modified %llx on {%llx:%llu} [exp %llx]",
-			       (unsigned long long) status->data_version,
-			       vnode->fid.vid, vnode->fid.vnode,
-			       (unsigned long long) *expected_version);
-			vnode->invalid_before = status->data_version;
-			if (vnode->status.type == AFS_FTYPE_DIR) {
-				if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
-					afs_stat_v(vnode, n_inval);
-			} else {
-				set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
-			}
-		} else if (vnode->status.type == AFS_FTYPE_DIR) {
-			/* Expected directory change is handled elsewhere so
-			 * that we can locally edit the directory and save on a
-			 * download.
-			 */
-			if (test_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
-				flags &= ~AFS_VNODE_DATA_CHANGED;
-		}
-	}
-
-	if (flags & (AFS_VNODE_DATA_CHANGED | AFS_VNODE_NOT_YET_SET)) {
-		inode_set_iversion_raw(&vnode->vfs_inode, status->data_version);
-		i_size_write(&vnode->vfs_inode, status->size);
-	}
-}
-
-/*
  * decode an AFSFetchStatus block
  */
-static int xdr_decode_AFSFetchStatus(struct afs_call *call,
-				     const __be32 **_bp,
-				     struct afs_file_status *status,
-				     struct afs_vnode *vnode,
-				     const afs_dataversion_t *expected_version,
-				     struct afs_read *read_req)
+static int xdr_decode_AFSFetchStatus(const __be32 **_bp,
+				     struct afs_call *call,
+				     struct afs_status_cb *scb)
 {
 	const struct afs_xdr_AFSFetchStatus *xdr = (const void *)*_bp;
+	struct afs_file_status *status = &scb->status;
 	bool inline_error = (call->operation_ID == afs_FS_InlineBulkStatus);
 	u64 data_version, size;
 	u32 type, abort_code;
-	u8 flags = 0;
 
 	abort_code = ntohl(xdr->abort_code);
 
@@ -144,6 +79,7 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
 			 * case.
 			 */
 			status->abort_code = abort_code;
+			scb->have_error = true;
 			return 0;
 		}
 
@@ -161,44 +97,25 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
 	case AFS_FTYPE_FILE:
 	case AFS_FTYPE_DIR:
 	case AFS_FTYPE_SYMLINK:
-		if (type != status->type &&
-		    vnode &&
-		    !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
-			pr_warning("Vnode %llx:%llx:%x changed type %u to %u\n",
-				   vnode->fid.vid,
-				   vnode->fid.vnode,
-				   vnode->fid.unique,
-				   status->type, type);
-			goto bad;
-		}
 		status->type = type;
 		break;
 	default:
 		goto bad;
 	}
 
-#define EXTRACT_M(FIELD)					\
-	do {							\
-		u32 x = ntohl(xdr->FIELD);			\
-		if (status->FIELD != x) {			\
-			flags |= AFS_VNODE_META_CHANGED;	\
-			status->FIELD = x;			\
-		}						\
-	} while (0)
-
-	EXTRACT_M(nlink);
-	EXTRACT_M(author);
-	EXTRACT_M(owner);
-	EXTRACT_M(caller_access); /* call ticket dependent */
-	EXTRACT_M(anon_access);
-	EXTRACT_M(mode);
-	EXTRACT_M(group);
+	status->nlink		= ntohl(xdr->nlink);
+	status->author		= ntohl(xdr->author);
+	status->owner		= ntohl(xdr->owner);
+	status->caller_access	= ntohl(xdr->caller_access); /* Ticket dependent */
+	status->anon_access	= ntohl(xdr->anon_access);
+	status->mode		= ntohl(xdr->mode) & S_IALLUGO;
+	status->group		= ntohl(xdr->group);
+	status->lock_count	= ntohl(xdr->lock_count);
 
 	status->mtime_client.tv_sec = ntohl(xdr->mtime_client);
 	status->mtime_client.tv_nsec = 0;
 	status->mtime_server.tv_sec = ntohl(xdr->mtime_server);
 	status->mtime_server.tv_nsec = 0;
-	status->lock_count   = ntohl(xdr->lock_count);
 
 	size  = (u64)ntohl(xdr->size_lo);
 	size |= (u64)ntohl(xdr->size_hi) << 32;
@@ -206,25 +123,10 @@ static int xdr_decode_AFSFetchStatus(struct afs_call *call,
 
 	data_version  = (u64)ntohl(xdr->data_version_lo);
 	data_version |= (u64)ntohl(xdr->data_version_hi) << 32;
-	if (data_version != status->data_version) {
-		status->data_version = data_version;
-		flags |= AFS_VNODE_DATA_CHANGED;
-	}
-
-	if (read_req) {
-		read_req->data_version = data_version;
-		read_req->file_size = size;
-	}
+	status->data_version = data_version;
+	scb->have_status = true;
 
 	*_bp = (const void *)*_bp + sizeof(*xdr);
-
-	if (vnode) {
-		if (test_bit(AFS_VNODE_UNSET, &vnode->flags))
-			flags |= AFS_VNODE_NOT_YET_SET;
-		afs_update_inode_from_status(vnode, status, expected_version,
-					     flags);
-	}
-
 	return 0;
 
 bad:
@@ -232,77 +134,22 @@ bad:
 	return afs_protocol_error(call, -EBADMSG, afs_eproto_bad_status);
 }
 
-/*
- * Decode the file status.  We need to lock the target vnode if we're going to
- * update its status so that stat() sees the attributes update atomically.
- */
-static int afs_decode_status(struct afs_call *call,
-			     const __be32 **_bp,
-			     struct afs_file_status *status,
-			     struct afs_vnode *vnode,
-			     const afs_dataversion_t *expected_version,
-			     struct afs_read *read_req)
-{
-	int ret;
-
-	if (!vnode)
-		return xdr_decode_AFSFetchStatus(call, _bp, status, vnode,
-						 expected_version, read_req);
-
-	write_seqlock(&vnode->cb_lock);
-	ret = xdr_decode_AFSFetchStatus(call, _bp, status, vnode,
-					expected_version, read_req);
-	write_sequnlock(&vnode->cb_lock);
-	return ret;
-}
-
-/*
- * decode an AFSCallBack block
- */
-static void xdr_decode_AFSCallBack(struct afs_call *call,
-				   struct afs_vnode *vnode,
-				   const __be32 **_bp)
-{
-	struct afs_cb_interest *old, *cbi = call->cbi;
-	const __be32 *bp = *_bp;
-	u32 cb_expiry;
-
-	write_seqlock(&vnode->cb_lock);
-
-	if (!afs_cb_is_broken(call->cb_break, vnode, cbi)) {
-		vnode->cb_version	= ntohl(*bp++);
-		cb_expiry		= ntohl(*bp++);
-		vnode->cb_type		= ntohl(*bp++);
-		vnode->cb_expires_at	= cb_expiry + ktime_get_real_seconds();
-		old = vnode->cb_interest;
-		if (old != call->cbi) {
-			vnode->cb_interest = cbi;
-			cbi = old;
-		}
-		set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
-	} else {
-		bp += 3;
-	}
-
-	write_sequnlock(&vnode->cb_lock);
-	call->cbi = cbi;
-	*_bp = bp;
-}
-
-static ktime_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
+static time64_t xdr_decode_expiry(struct afs_call *call, u32 expiry)
 {
-	return ktime_add_ns(call->reply_time, expiry * NSEC_PER_SEC);
+	return ktime_divns(call->reply_time, NSEC_PER_SEC) + expiry;
 }
 
-static void xdr_decode_AFSCallBack_raw(struct afs_call *call,
-				       const __be32 **_bp,
-				       struct afs_callback *cb)
+static void xdr_decode_AFSCallBack(const __be32 **_bp,
+				   struct afs_call *call,
+				   struct afs_status_cb *scb)
 {
+	struct afs_callback *cb = &scb->callback;
 	const __be32 *bp = *_bp;
 
-	cb->version	= ntohl(*bp++);
+	bp++; /* version */
 	cb->expires_at	= xdr_decode_expiry(call, ntohl(*bp++));
-	cb->type	= ntohl(*bp++);
+	bp++; /* type */
+	scb->have_cb	= true;
 	*_bp = bp;
 }
 
@@ -395,7 +242,6 @@ static void xdr_decode_AFSFetchVolumeStatus(const __be32 **_bp,
  */
 static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
@@ -403,16 +249,13 @@ static int afs_deliver_fs_fetch_status_vnode(struct afs_call *call)
 	if (ret < 0)
 		return ret;
 
-	_enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
-
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = afs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	xdr_decode_AFSCallBack(call, vnode, &bp);
-	xdr_decode_AFSVolSync(&bp, call->reply[1]);
+	xdr_decode_AFSCallBack(&bp, call, call->out_scb);
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -431,8 +274,8 @@ static const struct afs_call_type afs_RXFSFetchStatus_vnode = {
 /*
  * fetch the status information for a file
  */
-int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsync,
-			     bool new_inode)
+int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
+			     struct afs_volsync *volsync)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -440,7 +283,7 @@ int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_fetch_file_status(fc, volsync, new_inode);
+		return yfs_fs_fetch_file_status(fc, scb, volsync);
 
 	_enter(",%x,{%llx:%llu},,",
 	       key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
@@ -453,10 +296,8 @@ int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
 	}
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = volsync;
-	call->expected_version = new_inode ? 1 : vnode->status.data_version;
-	call->want_reply_time = true;
+	call->out_scb = scb;
+	call->out_volsync = volsync;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -465,10 +306,12 @@ int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
 	bp[2] = htonl(vnode->fid.vnode);
 	bp[3] = htonl(vnode->fid.unique);
 
-	call->cb_break = fc->cb_break;
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -476,8 +319,7 @@ int afs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
  */
 static int afs_deliver_fs_fetch_data(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
-	struct afs_read *req = call->reply[2];
+	struct afs_read *req = call->read_request;
 	const __be32 *bp;
 	unsigned int size;
 	int ret;
@@ -498,7 +340,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 			afs_extract_to_tmp(call);
 		}
 
-		/* extract the returned data length */
+		/* Fall through - and extract the returned data length */
 	case 1:
 		_debug("extract data length");
 		ret = afs_extract_data(call, true);
@@ -525,7 +367,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 		iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
 		ASSERTCMP(size, <=, PAGE_SIZE);
 
-		/* extract the returned data */
+		/* Fall through - and extract the returned data */
 	case 2:
 		_debug("extract data %zu/%llu",
 		       iov_iter_count(&call->iter), req->remain);
@@ -539,7 +381,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 		if (req->offset == PAGE_SIZE) {
 			req->offset = 0;
 			if (req->page_done)
-				req->page_done(call, req);
+				req->page_done(req);
 			req->index++;
 			if (req->remain > 0)
 				goto begin_page;
@@ -552,6 +394,8 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 		/* Discard any excess data the server gave us */
 		iov_iter_discard(&call->iter, READ, req->actual_len - req->len);
 		call->unmarshall = 3;
+
+		/* Fall through */
 	case 3:
 		_debug("extract discard %zu/%llu",
 		       iov_iter_count(&call->iter), req->actual_len - req->len);
@@ -564,19 +408,21 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 		call->unmarshall = 4;
 		afs_extract_to_buf(call, (21 + 3 + 6) * 4);
 
-		/* extract the metadata */
+		/* Fall through - and extract the metadata */
 	case 4:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
 			return ret;
 
 		bp = call->buffer;
-		ret = afs_decode_status(call, &bp, &vnode->status, vnode,
-					&vnode->status.data_version, req);
+		ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
 		if (ret < 0)
 			return ret;
-		xdr_decode_AFSCallBack(call, vnode, &bp);
-		xdr_decode_AFSVolSync(&bp, call->reply[1]);
+		xdr_decode_AFSCallBack(&bp, call, call->out_scb);
+		xdr_decode_AFSVolSync(&bp, call->out_volsync);
+
+		req->data_version = call->out_scb->status.data_version;
+		req->file_size = call->out_scb->status.size;
 
 		call->unmarshall++;
 
@@ -589,7 +435,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 			zero_user_segment(req->pages[req->index],
 					  req->offset, PAGE_SIZE);
 		if (req->page_done)
-			req->page_done(call, req);
+			req->page_done(req);
 		req->offset = 0;
 	}
 
@@ -599,7 +445,7 @@ static int afs_deliver_fs_fetch_data(struct afs_call *call)
 
 static void afs_fetch_data_destructor(struct afs_call *call)
 {
-	struct afs_read *req = call->reply[2];
+	struct afs_read *req = call->read_request;
 
 	afs_put_read(req);
 	afs_flat_call_destructor(call);
@@ -625,7 +471,9 @@ static const struct afs_call_type afs_RXFSFetchData64 = {
 /*
  * fetch data from a very large file
  */
-static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, struct afs_read *req)
+static int afs_fs_fetch_data64(struct afs_fs_cursor *fc,
+			       struct afs_status_cb *scb,
+			       struct afs_read *req)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -639,11 +487,9 @@ static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, struct afs_read *req)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = NULL; /* volsync */
-	call->reply[2] = req;
-	call->expected_version = vnode->status.data_version;
-	call->want_reply_time = true;
+	call->out_scb = scb;
+	call->out_volsync = NULL;
+	call->read_request = req;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -657,16 +503,19 @@ static int afs_fs_fetch_data64(struct afs_fs_cursor *fc, struct afs_read *req)
 	bp[7] = htonl(lower_32_bits(req->len));
 
 	refcount_inc(&req->usage);
-	call->cb_break = fc->cb_break;
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
  * fetch data from a file
  */
-int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
+int afs_fs_fetch_data(struct afs_fs_cursor *fc,
+		      struct afs_status_cb *scb,
+		      struct afs_read *req)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -674,12 +523,12 @@ int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_fetch_data(fc, req);
+		return yfs_fs_fetch_data(fc, scb, req);
 
 	if (upper_32_bits(req->pos) ||
 	    upper_32_bits(req->len) ||
 	    upper_32_bits(req->pos + req->len))
-		return afs_fs_fetch_data64(fc, req);
+		return afs_fs_fetch_data64(fc, scb, req);
 
 	_enter("");
 
@@ -688,11 +537,9 @@ int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = NULL; /* volsync */
-	call->reply[2] = req;
-	call->expected_version = vnode->status.data_version;
-	call->want_reply_time = true;
+	call->out_scb = scb;
+	call->out_volsync = NULL;
+	call->read_request = req;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -704,10 +551,11 @@ int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
 	bp[5] = htonl(lower_32_bits(req->len));
 
 	refcount_inc(&req->usage);
-	call->cb_break = fc->cb_break;
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -715,28 +563,24 @@ int afs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
  */
 static int afs_deliver_fs_create_vnode(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
-	_enter("{%u}", call->unmarshall);
-
 	ret = afs_transfer_reply(call);
 	if (ret < 0)
 		return ret;
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	xdr_decode_AFSFid(&bp, call->reply[1]);
-	ret = afs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL);
+	xdr_decode_AFSFid(&bp, call->out_fid);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	ret = afs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
-	xdr_decode_AFSCallBack_raw(call, &bp, call->reply[3]);
-	/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
+	xdr_decode_AFSCallBack(&bp, call, call->out_scb);
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -765,24 +609,23 @@ static const struct afs_call_type afs_RXFSMakeDir = {
 int afs_fs_create(struct afs_fs_cursor *fc,
 		  const char *name,
 		  umode_t mode,
-		  u64 current_data_version,
+		  struct afs_status_cb *dvnode_scb,
 		  struct afs_fid *newfid,
-		  struct afs_file_status *newstatus,
-		  struct afs_callback *newcb)
+		  struct afs_status_cb *new_scb)
 {
-	struct afs_vnode *vnode = fc->vnode;
+	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
-	struct afs_net *net = afs_v2net(vnode);
+	struct afs_net *net = afs_v2net(dvnode);
 	size_t namesz, reqsz, padsz;
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags)){
 		if (S_ISDIR(mode))
-			return yfs_fs_make_dir(fc, name, mode, current_data_version,
-					       newfid, newstatus, newcb);
+			return yfs_fs_make_dir(fc, name, mode, dvnode_scb,
+					       newfid, new_scb);
 		else
-			return yfs_fs_create_file(fc, name, mode, current_data_version,
-						  newfid, newstatus, newcb);
+			return yfs_fs_create_file(fc, name, mode, dvnode_scb,
+						  newfid, new_scb);
 	}
 
 	_enter("");
@@ -798,19 +641,16 @@ int afs_fs_create(struct afs_fs_cursor *fc,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = newfid;
-	call->reply[2] = newstatus;
-	call->reply[3] = newcb;
-	call->expected_version = current_data_version + 1;
-	call->want_reply_time = true;
+	call->out_dir_scb = dvnode_scb;
+	call->out_fid = newfid;
+	call->out_scb = new_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
 	*bp++ = htonl(S_ISDIR(mode) ? FSMAKEDIR : FSCREATEFILE);
-	*bp++ = htonl(vnode->fid.vid);
-	*bp++ = htonl(vnode->fid.vnode);
-	*bp++ = htonl(vnode->fid.unique);
+	*bp++ = htonl(dvnode->fid.vid);
+	*bp++ = htonl(dvnode->fid.vnode);
+	*bp++ = htonl(dvnode->fid.unique);
 	*bp++ = htonl(namesz);
 	memcpy(bp, name, namesz);
 	bp = (void *) bp + namesz;
@@ -819,39 +659,38 @@ int afs_fs_create(struct afs_fs_cursor *fc,
 		bp = (void *) bp + padsz;
 	}
 	*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
-	*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
+	*bp++ = htonl(dvnode->vfs_inode.i_mtime.tv_sec); /* mtime */
 	*bp++ = 0; /* owner */
 	*bp++ = 0; /* group */
 	*bp++ = htonl(mode & S_IALLUGO); /* unix mode */
 	*bp++ = 0; /* segment size */
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &dvnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
- * deliver reply data to an FS.RemoveFile or FS.RemoveDir
+ * Deliver reply data to any operation that returns directory status and volume
+ * sync.
  */
-static int afs_deliver_fs_remove(struct afs_call *call)
+static int afs_deliver_fs_dir_status_and_vol(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
-	_enter("{%u}", call->unmarshall);
-
 	ret = afs_transfer_reply(call);
 	if (ret < 0)
 		return ret;
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = afs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
-	/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -863,14 +702,14 @@ static int afs_deliver_fs_remove(struct afs_call *call)
 static const struct afs_call_type afs_RXFSRemoveFile = {
 	.name		= "FS.RemoveFile",
 	.op		= afs_FS_RemoveFile,
-	.deliver	= afs_deliver_fs_remove,
+	.deliver	= afs_deliver_fs_dir_status_and_vol,
 	.destructor	= afs_flat_call_destructor,
 };
 
 static const struct afs_call_type afs_RXFSRemoveDir = {
 	.name		= "FS.RemoveDir",
 	.op		= afs_FS_RemoveDir,
-	.deliver	= afs_deliver_fs_remove,
+	.deliver	= afs_deliver_fs_dir_status_and_vol,
 	.destructor	= afs_flat_call_destructor,
 };
 
@@ -878,7 +717,7 @@ static const struct afs_call_type afs_RXFSRemoveDir = {
  * remove a file or directory
  */
 int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
-		  const char *name, bool isdir, u64 current_data_version)
+		  const char *name, bool isdir, struct afs_status_cb *dvnode_scb)
 {
 	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
@@ -887,7 +726,7 @@ int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_remove(fc, vnode, name, isdir, current_data_version);
+		return yfs_fs_remove(fc, vnode, name, isdir, dvnode_scb);
 
 	_enter("");
 
@@ -902,9 +741,7 @@ int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = dvnode;
-	call->reply[1] = vnode;
-	call->expected_version = current_data_version + 1;
+	call->out_dir_scb = dvnode_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -921,8 +758,10 @@ int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 	}
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &dvnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &dvnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -930,7 +769,6 @@ int afs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
  */
 static int afs_deliver_fs_link(struct afs_call *call)
 {
-	struct afs_vnode *dvnode = call->reply[0], *vnode = call->reply[1];
 	const __be32 *bp;
 	int ret;
 
@@ -942,14 +780,13 @@ static int afs_deliver_fs_link(struct afs_call *call)
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = afs_decode_status(call, &bp, &vnode->status, vnode, NULL, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	ret = afs_decode_status(call, &bp, &dvnode->status, dvnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
-	/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -969,7 +806,9 @@ static const struct afs_call_type afs_RXFSLink = {
  * make a hard link
  */
 int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
-		const char *name, u64 current_data_version)
+		const char *name,
+		struct afs_status_cb *dvnode_scb,
+		struct afs_status_cb *vnode_scb)
 {
 	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
@@ -978,7 +817,7 @@ int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_link(fc, vnode, name, current_data_version);
+		return yfs_fs_link(fc, vnode, name, dvnode_scb, vnode_scb);
 
 	_enter("");
 
@@ -991,9 +830,8 @@ int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = dvnode;
-	call->reply[1] = vnode;
-	call->expected_version = current_data_version + 1;
+	call->out_dir_scb = dvnode_scb;
+	call->out_scb = vnode_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1013,8 +851,10 @@ int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 	*bp++ = htonl(vnode->fid.unique);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &vnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1022,7 +862,6 @@ int afs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
  */
 static int afs_deliver_fs_symlink(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
@@ -1034,15 +873,14 @@ static int afs_deliver_fs_symlink(struct afs_call *call)
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	xdr_decode_AFSFid(&bp, call->reply[1]);
-	ret = afs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL);
+	xdr_decode_AFSFid(&bp, call->out_fid);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	ret = afs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
-	/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -1064,19 +902,19 @@ static const struct afs_call_type afs_RXFSSymlink = {
 int afs_fs_symlink(struct afs_fs_cursor *fc,
 		   const char *name,
 		   const char *contents,
-		   u64 current_data_version,
+		   struct afs_status_cb *dvnode_scb,
 		   struct afs_fid *newfid,
-		   struct afs_file_status *newstatus)
+		   struct afs_status_cb *new_scb)
 {
-	struct afs_vnode *vnode = fc->vnode;
+	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
-	struct afs_net *net = afs_v2net(vnode);
+	struct afs_net *net = afs_v2net(dvnode);
 	size_t namesz, reqsz, padsz, c_namesz, c_padsz;
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_symlink(fc, name, contents, current_data_version,
-				      newfid, newstatus);
+		return yfs_fs_symlink(fc, name, contents, dvnode_scb,
+				      newfid, new_scb);
 
 	_enter("");
 
@@ -1094,17 +932,16 @@ int afs_fs_symlink(struct afs_fs_cursor *fc,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = newfid;
-	call->reply[2] = newstatus;
-	call->expected_version = current_data_version + 1;
+	call->out_dir_scb = dvnode_scb;
+	call->out_fid = newfid;
+	call->out_scb = new_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
 	*bp++ = htonl(FSSYMLINK);
-	*bp++ = htonl(vnode->fid.vid);
-	*bp++ = htonl(vnode->fid.vnode);
-	*bp++ = htonl(vnode->fid.unique);
+	*bp++ = htonl(dvnode->fid.vid);
+	*bp++ = htonl(dvnode->fid.vnode);
+	*bp++ = htonl(dvnode->fid.unique);
 	*bp++ = htonl(namesz);
 	memcpy(bp, name, namesz);
 	bp = (void *) bp + namesz;
@@ -1120,15 +957,17 @@ int afs_fs_symlink(struct afs_fs_cursor *fc,
 		bp = (void *) bp + c_padsz;
 	}
 	*bp++ = htonl(AFS_SET_MODE | AFS_SET_MTIME);
-	*bp++ = htonl(vnode->vfs_inode.i_mtime.tv_sec); /* mtime */
+	*bp++ = htonl(dvnode->vfs_inode.i_mtime.tv_sec); /* mtime */
 	*bp++ = 0; /* owner */
 	*bp++ = 0; /* group */
 	*bp++ = htonl(S_IRWXUGO); /* unix mode */
 	*bp++ = 0; /* segment size */
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &dvnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1136,29 +975,24 @@ int afs_fs_symlink(struct afs_fs_cursor *fc,
  */
 static int afs_deliver_fs_rename(struct afs_call *call)
 {
-	struct afs_vnode *orig_dvnode = call->reply[0], *new_dvnode = call->reply[1];
 	const __be32 *bp;
 	int ret;
 
-	_enter("{%u}", call->unmarshall);
-
 	ret = afs_transfer_reply(call);
 	if (ret < 0)
 		return ret;
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = afs_decode_status(call, &bp, &orig_dvnode->status, orig_dvnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
-	if (new_dvnode != orig_dvnode) {
-		ret = afs_decode_status(call, &bp, &new_dvnode->status, new_dvnode,
-					&call->expected_version_2, NULL);
+	if (call->out_dir_scb != call->out_scb) {
+		ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
 		if (ret < 0)
 			return ret;
 	}
-	/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -1175,14 +1009,14 @@ static const struct afs_call_type afs_RXFSRename = {
 };
 
 /*
- * create a symbolic link
+ * Rename/move a file or directory.
  */
 int afs_fs_rename(struct afs_fs_cursor *fc,
 		  const char *orig_name,
 		  struct afs_vnode *new_dvnode,
 		  const char *new_name,
-		  u64 current_orig_data_version,
-		  u64 current_new_data_version)
+		  struct afs_status_cb *orig_dvnode_scb,
+		  struct afs_status_cb *new_dvnode_scb)
 {
 	struct afs_vnode *orig_dvnode = fc->vnode;
 	struct afs_call *call;
@@ -1193,8 +1027,8 @@ int afs_fs_rename(struct afs_fs_cursor *fc,
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
 		return yfs_fs_rename(fc, orig_name,
 				     new_dvnode, new_name,
-				     current_orig_data_version,
-				     current_new_data_version);
+				     orig_dvnode_scb,
+				     new_dvnode_scb);
 
 	_enter("");
 
@@ -1214,10 +1048,8 @@ int afs_fs_rename(struct afs_fs_cursor *fc,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = orig_dvnode;
-	call->reply[1] = new_dvnode;
-	call->expected_version = current_orig_data_version + 1;
-	call->expected_version_2 = current_new_data_version + 1;
+	call->out_dir_scb = orig_dvnode_scb;
+	call->out_scb = new_dvnode_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1245,8 +1077,10 @@ int afs_fs_rename(struct afs_fs_cursor *fc,
 	}
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &orig_dvnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1254,7 +1088,6 @@ int afs_fs_rename(struct afs_fs_cursor *fc,
  */
 static int afs_deliver_fs_store_data(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
@@ -1266,13 +1099,10 @@ static int afs_deliver_fs_store_data(struct afs_call *call)
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = afs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
-
-	afs_pages_written_back(vnode, call);
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -1302,7 +1132,8 @@ static int afs_fs_store_data64(struct afs_fs_cursor *fc,
 			       struct address_space *mapping,
 			       pgoff_t first, pgoff_t last,
 			       unsigned offset, unsigned to,
-			       loff_t size, loff_t pos, loff_t i_size)
+			       loff_t size, loff_t pos, loff_t i_size,
+			       struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1320,13 +1151,12 @@ static int afs_fs_store_data64(struct afs_fs_cursor *fc,
 
 	call->key = fc->key;
 	call->mapping = mapping;
-	call->reply[0] = vnode;
 	call->first = first;
 	call->last = last;
 	call->first_offset = offset;
 	call->last_to = to;
 	call->send_pages = true;
-	call->expected_version = vnode->status.data_version + 1;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1350,7 +1180,9 @@ static int afs_fs_store_data64(struct afs_fs_cursor *fc,
 	*bp++ = htonl((u32) i_size);
 
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1358,7 +1190,8 @@ static int afs_fs_store_data64(struct afs_fs_cursor *fc,
  */
 int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
 		      pgoff_t first, pgoff_t last,
-		      unsigned offset, unsigned to)
+		      unsigned offset, unsigned to,
+		      struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1367,7 +1200,7 @@ int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_store_data(fc, mapping, first, last, offset, to);
+		return yfs_fs_store_data(fc, mapping, first, last, offset, to, scb);
 
 	_enter(",%x,{%llx:%llu},,",
 	       key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
@@ -1388,7 +1221,7 @@ int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
 
 	if (pos >> 32 || i_size >> 32 || size >> 32 || (pos + size) >> 32)
 		return afs_fs_store_data64(fc, mapping, first, last, offset, to,
-					   size, pos, i_size);
+					   size, pos, i_size, scb);
 
 	call = afs_alloc_flat_call(net, &afs_RXFSStoreData,
 				   (4 + 6 + 3) * 4,
@@ -1398,13 +1231,12 @@ int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
 
 	call->key = fc->key;
 	call->mapping = mapping;
-	call->reply[0] = vnode;
 	call->first = first;
 	call->last = last;
 	call->first_offset = offset;
 	call->last_to = to;
 	call->send_pages = true;
-	call->expected_version = vnode->status.data_version + 1;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1426,7 +1258,9 @@ int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1434,7 +1268,6 @@ int afs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
  */
 static int afs_deliver_fs_store_status(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
@@ -1446,11 +1279,10 @@ static int afs_deliver_fs_store_status(struct afs_call *call)
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = afs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -1484,7 +1316,8 @@ static const struct afs_call_type afs_RXFSStoreData64_as_Status = {
  * set the attributes on a very large file, using FS.StoreData rather than
  * FS.StoreStatus so as to alter the file size also
  */
-static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
+static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr,
+				 struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1503,8 +1336,7 @@ static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->expected_version = vnode->status.data_version + 1;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1515,8 +1347,8 @@ static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
 
 	xdr_encode_AFS_StoreStatus(&bp, attr);
 
-	*bp++ = 0;				/* position of start of write */
-	*bp++ = 0;
+	*bp++ = htonl(attr->ia_size >> 32);	/* position of start of write */
+	*bp++ = htonl((u32) attr->ia_size);
 	*bp++ = 0;				/* size of write */
 	*bp++ = 0;
 	*bp++ = htonl(attr->ia_size >> 32);	/* new file length */
@@ -1524,14 +1356,17 @@ static int afs_fs_setattr_size64(struct afs_fs_cursor *fc, struct iattr *attr)
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
  * set the attributes on a file, using FS.StoreData rather than FS.StoreStatus
  * so as to alter the file size also
  */
-static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
+static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr,
+			       struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1543,7 +1378,7 @@ static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
 
 	ASSERT(attr->ia_valid & ATTR_SIZE);
 	if (attr->ia_size >> 32)
-		return afs_fs_setattr_size64(fc, attr);
+		return afs_fs_setattr_size64(fc, attr, scb);
 
 	call = afs_alloc_flat_call(net, &afs_RXFSStoreData_as_Status,
 				   (4 + 6 + 3) * 4,
@@ -1552,8 +1387,7 @@ static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->expected_version = vnode->status.data_version + 1;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1564,20 +1398,23 @@ static int afs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
 
 	xdr_encode_AFS_StoreStatus(&bp, attr);
 
-	*bp++ = 0;				/* position of start of write */
+	*bp++ = htonl(attr->ia_size);		/* position of start of write */
 	*bp++ = 0;				/* size of write */
 	*bp++ = htonl(attr->ia_size);		/* new file length */
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
  * set the attributes on a file, using FS.StoreData if there's a change in file
  * size, and FS.StoreStatus otherwise
  */
-int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
+int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr,
+		   struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1585,10 +1422,10 @@ int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_setattr(fc, attr);
+		return yfs_fs_setattr(fc, attr, scb);
 
 	if (attr->ia_valid & ATTR_SIZE)
-		return afs_fs_setattr_size(fc, attr);
+		return afs_fs_setattr_size(fc, attr, scb);
 
 	_enter(",%x,{%llx:%llu},,",
 	       key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
@@ -1600,8 +1437,7 @@ int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->expected_version = vnode->status.data_version;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1614,7 +1450,9 @@ int afs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1634,7 +1472,7 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 		call->unmarshall++;
 		afs_extract_to_buf(call, 12 * 4);
 
-		/* extract the returned status record */
+		/* Fall through - and extract the returned status record */
 	case 1:
 		_debug("extract status");
 		ret = afs_extract_data(call, true);
@@ -1642,11 +1480,11 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 			return ret;
 
 		bp = call->buffer;
-		xdr_decode_AFSFetchVolumeStatus(&bp, call->reply[1]);
+		xdr_decode_AFSFetchVolumeStatus(&bp, call->out_volstatus);
 		call->unmarshall++;
 		afs_extract_to_tmp(call);
 
-		/* extract the volume name length */
+		/* Fall through - and extract the volume name length */
 	case 2:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1658,23 +1496,23 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 			return afs_protocol_error(call, -EBADMSG,
 						  afs_eproto_volname_len);
 		size = (call->count + 3) & ~3; /* It's padded */
-		afs_extract_begin(call, call->reply[2], size);
+		afs_extract_to_buf(call, size);
 		call->unmarshall++;
 
-		/* extract the volume name */
+		/* Fall through - and extract the volume name */
 	case 3:
 		_debug("extract volname");
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
 			return ret;
 
-		p = call->reply[2];
+		p = call->buffer;
 		p[call->count] = 0;
 		_debug("volname '%s'", p);
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* extract the offline message length */
+		/* Fall through - and extract the offline message length */
 	case 4:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1686,24 +1524,24 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 			return afs_protocol_error(call, -EBADMSG,
 						  afs_eproto_offline_msg_len);
 		size = (call->count + 3) & ~3; /* It's padded */
-		afs_extract_begin(call, call->reply[2], size);
+		afs_extract_to_buf(call, size);
 		call->unmarshall++;
 
-		/* extract the offline message */
+		/* Fall through - and extract the offline message */
 	case 5:
 		_debug("extract offline");
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
 			return ret;
 
-		p = call->reply[2];
+		p = call->buffer;
 		p[call->count] = 0;
 		_debug("offline '%s'", p);
 
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* extract the message of the day length */
+		/* Fall through - and extract the message of the day length */
 	case 6:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1715,17 +1553,17 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 			return afs_protocol_error(call, -EBADMSG,
 						  afs_eproto_motd_len);
 		size = (call->count + 3) & ~3; /* It's padded */
-		afs_extract_begin(call, call->reply[2], size);
+		afs_extract_to_buf(call, size);
 		call->unmarshall++;
 
-		/* extract the message of the day */
+		/* Fall through - and extract the message of the day */
 	case 7:
 		_debug("extract motd");
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
 			return ret;
 
-		p = call->reply[2];
+		p = call->buffer;
 		p[call->count] = 0;
 		_debug("motd '%s'", p);
 
@@ -1740,23 +1578,13 @@ static int afs_deliver_fs_get_volume_status(struct afs_call *call)
 }
 
 /*
- * destroy an FS.GetVolumeStatus call
- */
-static void afs_get_volume_status_call_destructor(struct afs_call *call)
-{
-	kfree(call->reply[2]);
-	call->reply[2] = NULL;
-	afs_flat_call_destructor(call);
-}
-
-/*
  * FS.GetVolumeStatus operation type
  */
 static const struct afs_call_type afs_RXFSGetVolumeStatus = {
 	.name		= "FS.GetVolumeStatus",
 	.op		= afs_FS_GetVolumeStatus,
 	.deliver	= afs_deliver_fs_get_volume_status,
-	.destructor	= afs_get_volume_status_call_destructor,
+	.destructor	= afs_flat_call_destructor,
 };
 
 /*
@@ -1769,27 +1597,19 @@ int afs_fs_get_volume_status(struct afs_fs_cursor *fc,
 	struct afs_call *call;
 	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
-	void *tmpbuf;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
 		return yfs_fs_get_volume_status(fc, vs);
 
 	_enter("");
 
-	tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
-	if (!tmpbuf)
-		return -ENOMEM;
-
-	call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4, 12 * 4);
-	if (!call) {
-		kfree(tmpbuf);
+	call = afs_alloc_flat_call(net, &afs_RXFSGetVolumeStatus, 2 * 4,
+				   max(12 * 4, AFSOPAQUEMAX + 1));
+	if (!call)
 		return -ENOMEM;
-	}
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = vs;
-	call->reply[2] = tmpbuf;
+	call->out_volstatus = vs;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1798,7 +1618,9 @@ int afs_fs_get_volume_status(struct afs_fs_cursor *fc,
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1817,7 +1639,7 @@ static int afs_deliver_fs_xxxx_lock(struct afs_call *call)
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	/* xdr_decode_AFSVolSync(&bp, call->reply[X]); */
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -1830,6 +1652,7 @@ static const struct afs_call_type afs_RXFSSetLock = {
 	.name		= "FS.SetLock",
 	.op		= afs_FS_SetLock,
 	.deliver	= afs_deliver_fs_xxxx_lock,
+	.done		= afs_lock_op_done,
 	.destructor	= afs_flat_call_destructor,
 };
 
@@ -1840,6 +1663,7 @@ static const struct afs_call_type afs_RXFSExtendLock = {
 	.name		= "FS.ExtendLock",
 	.op		= afs_FS_ExtendLock,
 	.deliver	= afs_deliver_fs_xxxx_lock,
+	.done		= afs_lock_op_done,
 	.destructor	= afs_flat_call_destructor,
 };
 
@@ -1856,7 +1680,8 @@ static const struct afs_call_type afs_RXFSReleaseLock = {
 /*
  * Set a lock on a file
  */
-int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
+int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type,
+		    struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1864,7 +1689,7 @@ int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_set_lock(fc, type);
+		return yfs_fs_set_lock(fc, type, scb);
 
 	_enter("");
 
@@ -1873,7 +1698,8 @@ int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
+	call->lvnode = vnode;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1884,14 +1710,16 @@ int afs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
 	*bp++ = htonl(type);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_calli(call, &vnode->fid, type);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
  * extend a lock on a file
  */
-int afs_fs_extend_lock(struct afs_fs_cursor *fc)
+int afs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1899,7 +1727,7 @@ int afs_fs_extend_lock(struct afs_fs_cursor *fc)
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_extend_lock(fc);
+		return yfs_fs_extend_lock(fc, scb);
 
 	_enter("");
 
@@ -1908,7 +1736,8 @@ int afs_fs_extend_lock(struct afs_fs_cursor *fc)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
+	call->lvnode = vnode;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1919,13 +1748,15 @@ int afs_fs_extend_lock(struct afs_fs_cursor *fc)
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
  * release a lock on a file
  */
-int afs_fs_release_lock(struct afs_fs_cursor *fc)
+int afs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1933,7 +1764,7 @@ int afs_fs_release_lock(struct afs_fs_cursor *fc)
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_release_lock(fc);
+		return yfs_fs_release_lock(fc, scb);
 
 	_enter("");
 
@@ -1942,7 +1773,8 @@ int afs_fs_release_lock(struct afs_fs_cursor *fc)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
+	call->lvnode = vnode;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1953,7 +1785,9 @@ int afs_fs_release_lock(struct afs_fs_cursor *fc)
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1998,7 +1832,8 @@ int afs_fs_give_up_all_callbacks(struct afs_net *net,
 	*bp++ = htonl(FSGIVEUPALLCALLBACKS);
 
 	/* Can't take a ref on server */
-	return afs_make_call(ac, call, GFP_NOFS, false);
+	afs_make_call(ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, ac);
 }
 
 /*
@@ -2016,7 +1851,7 @@ static int afs_deliver_fs_get_capabilities(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* Extract the capabilities word count */
+		/* Fall through - and extract the capabilities word count */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -2029,7 +1864,7 @@ static int afs_deliver_fs_get_capabilities(struct afs_call *call)
 		iov_iter_discard(&call->iter, READ, count * sizeof(__be32));
 		call->unmarshall++;
 
-		/* Extract capabilities words */
+		/* Fall through - and extract capabilities words */
 	case 2:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -2045,14 +1880,6 @@ static int afs_deliver_fs_get_capabilities(struct afs_call *call)
 	return 0;
 }
 
-static void afs_destroy_fs_get_capabilities(struct afs_call *call)
-{
-	struct afs_server *server = call->reply[0];
-
-	afs_put_server(call->net, server);
-	afs_flat_call_destructor(call);
-}
-
 /*
  * FS.GetCapabilities operation type
  */
@@ -2061,19 +1888,18 @@ static const struct afs_call_type afs_RXFSGetCapabilities = {
 	.op		= afs_FS_GetCapabilities,
 	.deliver	= afs_deliver_fs_get_capabilities,
 	.done		= afs_fileserver_probe_result,
-	.destructor	= afs_destroy_fs_get_capabilities,
+	.destructor	= afs_flat_call_destructor,
 };
 
 /*
  * Probe a fileserver for the capabilities that it supports.  This can
  * return up to 196 words.
  */
-int afs_fs_get_capabilities(struct afs_net *net,
-			    struct afs_server *server,
-			    struct afs_addr_cursor *ac,
-			    struct key *key,
-			    unsigned int server_index,
-			    bool async)
+struct afs_call *afs_fs_get_capabilities(struct afs_net *net,
+					 struct afs_server *server,
+					 struct afs_addr_cursor *ac,
+					 struct key *key,
+					 unsigned int server_index)
 {
 	struct afs_call *call;
 	__be32 *bp;
@@ -2082,13 +1908,14 @@ int afs_fs_get_capabilities(struct afs_net *net,
 
 	call = afs_alloc_flat_call(net, &afs_RXFSGetCapabilities, 1 * 4, 16 * 4);
 	if (!call)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	call->key = key;
-	call->reply[0] = afs_get_server(server);
-	call->reply[1] = (void *)(long)server_index;
+	call->server = afs_get_server(server, afs_server_trace_get_caps);
+	call->server_index = server_index;
 	call->upgrade = true;
-	call->want_reply_time = true;
+	call->async = true;
+	call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -2096,7 +1923,8 @@ int afs_fs_get_capabilities(struct afs_net *net,
 
 	/* Can't take a ref on server */
 	trace_afs_make_fs_call(call, NULL);
-	return afs_make_call(ac, call, GFP_NOFS, async);
+	afs_make_call(ac, call, GFP_NOFS);
+	return call;
 }
 
 /*
@@ -2104,10 +1932,6 @@ int afs_fs_get_capabilities(struct afs_net *net,
  */
 static int afs_deliver_fs_fetch_status(struct afs_call *call)
 {
-	struct afs_file_status *status = call->reply[1];
-	struct afs_callback *callback = call->reply[2];
-	struct afs_volsync *volsync = call->reply[3];
-	struct afs_fid *fid = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
@@ -2115,16 +1939,13 @@ static int afs_deliver_fs_fetch_status(struct afs_call *call)
 	if (ret < 0)
 		return ret;
 
-	_enter("{%llx:%llu}", fid->vid, fid->vnode);
-
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = afs_decode_status(call, &bp, status, NULL,
-				&call->expected_version, NULL);
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	xdr_decode_AFSCallBack_raw(call, &bp, callback);
-	xdr_decode_AFSVolSync(&bp, volsync);
+	xdr_decode_AFSCallBack(&bp, call, call->out_scb);
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -2146,15 +1967,14 @@ static const struct afs_call_type afs_RXFSFetchStatus = {
 int afs_fs_fetch_status(struct afs_fs_cursor *fc,
 			struct afs_net *net,
 			struct afs_fid *fid,
-			struct afs_file_status *status,
-			struct afs_callback *callback,
+			struct afs_status_cb *scb,
 			struct afs_volsync *volsync)
 {
 	struct afs_call *call;
 	__be32 *bp;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_fetch_status(fc, net, fid, status, callback, volsync);
+		return yfs_fs_fetch_status(fc, net, fid, scb, volsync);
 
 	_enter(",%x,{%llx:%llu},,",
 	       key_serial(fc->key), fid->vid, fid->vnode);
@@ -2166,12 +1986,9 @@ int afs_fs_fetch_status(struct afs_fs_cursor *fc,
 	}
 
 	call->key = fc->key;
-	call->reply[0] = fid;
-	call->reply[1] = status;
-	call->reply[2] = callback;
-	call->reply[3] = volsync;
-	call->expected_version = 1; /* vnode->status.data_version */
-	call->want_reply_time = true;
+	call->out_fid = fid;
+	call->out_scb = scb;
+	call->out_volsync = volsync;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -2180,10 +1997,11 @@ int afs_fs_fetch_status(struct afs_fs_cursor *fc,
 	bp[2] = htonl(fid->vnode);
 	bp[3] = htonl(fid->unique);
 
-	call->cb_break = fc->cb_break;
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -2191,9 +2009,7 @@ int afs_fs_fetch_status(struct afs_fs_cursor *fc,
  */
 static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 {
-	struct afs_file_status *statuses;
-	struct afs_callback *callbacks;
-	struct afs_vnode *vnode = call->reply[0];
+	struct afs_status_cb *scb;
 	const __be32 *bp;
 	u32 tmp;
 	int ret;
@@ -2206,6 +2022,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->unmarshall++;
 
 		/* Extract the file status count and array in two steps */
+		/* Fall through */
 	case 1:
 		_debug("extract status count");
 		ret = afs_extract_data(call, true);
@@ -2223,6 +2040,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	more_counts:
 		afs_extract_to_buf(call, 21 * sizeof(__be32));
 
+		/* Fall through */
 	case 2:
 		_debug("extract status array %u", call->count);
 		ret = afs_extract_data(call, true);
@@ -2230,10 +2048,8 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 			return ret;
 
 		bp = call->buffer;
-		statuses = call->reply[1];
-		ret = afs_decode_status(call, &bp, &statuses[call->count],
-					call->count == 0 ? vnode : NULL,
-					NULL, NULL);
+		scb = &call->out_scb[call->count];
+		ret = xdr_decode_AFSFetchStatus(&bp, call, scb);
 		if (ret < 0)
 			return ret;
 
@@ -2246,6 +2062,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		afs_extract_to_tmp(call);
 
 		/* Extract the callback count and array in two steps */
+		/* Fall through */
 	case 3:
 		_debug("extract CB count");
 		ret = afs_extract_data(call, true);
@@ -2262,6 +2079,7 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	more_cbs:
 		afs_extract_to_buf(call, 3 * sizeof(__be32));
 
+		/* Fall through */
 	case 4:
 		_debug("extract CB array");
 		ret = afs_extract_data(call, true);
@@ -2270,13 +2088,8 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 
 		_debug("unmarshall CB array");
 		bp = call->buffer;
-		callbacks = call->reply[2];
-		callbacks[call->count].version	= ntohl(bp[0]);
-		callbacks[call->count].expires_at = xdr_decode_expiry(call, ntohl(bp[1]));
-		callbacks[call->count].type	= ntohl(bp[2]);
-		statuses = call->reply[1];
-		if (call->count == 0 && vnode && statuses[0].abort_code == 0)
-			xdr_decode_AFSCallBack(call, vnode, &bp);
+		scb = &call->out_scb[call->count];
+		xdr_decode_AFSCallBack(&bp, call, scb);
 		call->count++;
 		if (call->count < call->count2)
 			goto more_cbs;
@@ -2284,13 +2097,14 @@ static int afs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		afs_extract_to_buf(call, 6 * sizeof(__be32));
 		call->unmarshall++;
 
+		/* Fall through */
 	case 5:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
 			return ret;
 
 		bp = call->buffer;
-		xdr_decode_AFSVolSync(&bp, call->reply[3]);
+		xdr_decode_AFSVolSync(&bp, call->out_volsync);
 
 		call->unmarshall++;
 
@@ -2318,8 +2132,7 @@ static const struct afs_call_type afs_RXFSInlineBulkStatus = {
 int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
 			      struct afs_net *net,
 			      struct afs_fid *fids,
-			      struct afs_file_status *statuses,
-			      struct afs_callback *callbacks,
+			      struct afs_status_cb *statuses,
 			      unsigned int nr_fids,
 			      struct afs_volsync *volsync)
 {
@@ -2328,7 +2141,7 @@ int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
 	int i;
 
 	if (test_bit(AFS_SERVER_FL_IS_YFS, &fc->cbi->server->flags))
-		return yfs_fs_inline_bulk_status(fc, net, fids, statuses, callbacks,
+		return yfs_fs_inline_bulk_status(fc, net, fids, statuses,
 						 nr_fids, volsync);
 
 	_enter(",%x,{%llx:%llu},%u",
@@ -2343,12 +2156,9 @@ int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
 	}
 
 	call->key = fc->key;
-	call->reply[0] = NULL; /* vnode for fid[0] */
-	call->reply[1] = statuses;
-	call->reply[2] = callbacks;
-	call->reply[3] = volsync;
+	call->out_scb = statuses;
+	call->out_volsync = volsync;
 	call->count2 = nr_fids;
-	call->want_reply_time = true;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -2360,8 +2170,204 @@ int afs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
 		*bp++ = htonl(fids[i].unique);
 	}
 
-	call->cb_break = fc->cb_break;
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &fids[0]);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
+}
+
+/*
+ * deliver reply data to an FS.FetchACL
+ */
+static int afs_deliver_fs_fetch_acl(struct afs_call *call)
+{
+	struct afs_acl *acl;
+	const __be32 *bp;
+	unsigned int size;
+	int ret;
+
+	_enter("{%u}", call->unmarshall);
+
+	switch (call->unmarshall) {
+	case 0:
+		afs_extract_to_tmp(call);
+		call->unmarshall++;
+
+		/* extract the returned data length */
+	case 1:
+		ret = afs_extract_data(call, true);
+		if (ret < 0)
+			return ret;
+
+		size = call->count2 = ntohl(call->tmp);
+		size = round_up(size, 4);
+
+		acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
+		if (!acl)
+			return -ENOMEM;
+		call->ret_acl = acl;
+		acl->size = call->count2;
+		afs_extract_begin(call, acl->data, size);
+		call->unmarshall++;
+
+		/* extract the returned data */
+	case 2:
+		ret = afs_extract_data(call, true);
+		if (ret < 0)
+			return ret;
+
+		afs_extract_to_buf(call, (21 + 6) * 4);
+		call->unmarshall++;
+
+		/* extract the metadata */
+	case 3:
+		ret = afs_extract_data(call, false);
+		if (ret < 0)
+			return ret;
+
+		bp = call->buffer;
+		ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
+		if (ret < 0)
+			return ret;
+		xdr_decode_AFSVolSync(&bp, call->out_volsync);
+
+		call->unmarshall++;
+
+	case 4:
+		break;
+	}
+
+	_leave(" = 0 [done]");
+	return 0;
+}
+
+static void afs_destroy_fs_fetch_acl(struct afs_call *call)
+{
+	kfree(call->ret_acl);
+	afs_flat_call_destructor(call);
+}
+
+/*
+ * FS.FetchACL operation type
+ */
+static const struct afs_call_type afs_RXFSFetchACL = {
+	.name		= "FS.FetchACL",
+	.op		= afs_FS_FetchACL,
+	.deliver	= afs_deliver_fs_fetch_acl,
+	.destructor	= afs_destroy_fs_fetch_acl,
+};
+
+/*
+ * Fetch the ACL for a file.
+ */
+struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *fc,
+				 struct afs_status_cb *scb)
+{
+	struct afs_vnode *vnode = fc->vnode;
+	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
+	__be32 *bp;
+
+	_enter(",%x,{%llx:%llu},,",
+	       key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
+
+	call = afs_alloc_flat_call(net, &afs_RXFSFetchACL, 16, (21 + 6) * 4);
+	if (!call) {
+		fc->ac.error = -ENOMEM;
+		return ERR_PTR(-ENOMEM);
+	}
+
+	call->key = fc->key;
+	call->ret_acl = NULL;
+	call->out_scb = scb;
+	call->out_volsync = NULL;
+
+	/* marshall the parameters */
+	bp = call->request;
+	bp[0] = htonl(FSFETCHACL);
+	bp[1] = htonl(vnode->fid.vid);
+	bp[2] = htonl(vnode->fid.vnode);
+	bp[3] = htonl(vnode->fid.unique);
+
+	afs_use_fs_server(call, fc->cbi);
+	trace_afs_make_fs_call(call, &vnode->fid);
+	afs_make_call(&fc->ac, call, GFP_KERNEL);
+	return (struct afs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
+}
+
+/*
+ * Deliver reply data to any operation that returns file status and volume
+ * sync.
+ */
+static int afs_deliver_fs_file_status_and_vol(struct afs_call *call)
+{
+	const __be32 *bp;
+	int ret;
+
+	ret = afs_transfer_reply(call);
+	if (ret < 0)
+		return ret;
+
+	bp = call->buffer;
+	ret = xdr_decode_AFSFetchStatus(&bp, call, call->out_scb);
+	if (ret < 0)
+		return ret;
+	xdr_decode_AFSVolSync(&bp, call->out_volsync);
+
+	_leave(" = 0 [done]");
+	return 0;
+}
+
+/*
+ * FS.StoreACL operation type
+ */
+static const struct afs_call_type afs_RXFSStoreACL = {
+	.name		= "FS.StoreACL",
+	.op		= afs_FS_StoreACL,
+	.deliver	= afs_deliver_fs_file_status_and_vol,
+	.destructor	= afs_flat_call_destructor,
+};
+
+/*
+ * Fetch the ACL for a file.
+ */
+int afs_fs_store_acl(struct afs_fs_cursor *fc, const struct afs_acl *acl,
+		     struct afs_status_cb *scb)
+{
+	struct afs_vnode *vnode = fc->vnode;
+	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
+	size_t size;
+	__be32 *bp;
+
+	_enter(",%x,{%llx:%llu},,",
+	       key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
+
+	size = round_up(acl->size, 4);
+	call = afs_alloc_flat_call(net, &afs_RXFSStoreACL,
+				   5 * 4 + size, (21 + 6) * 4);
+	if (!call) {
+		fc->ac.error = -ENOMEM;
+		return -ENOMEM;
+	}
+
+	call->key = fc->key;
+	call->out_scb = scb;
+	call->out_volsync = NULL;
+
+	/* marshall the parameters */
+	bp = call->request;
+	bp[0] = htonl(FSSTOREACL);
+	bp[1] = htonl(vnode->fid.vid);
+	bp[2] = htonl(vnode->fid.vnode);
+	bp[3] = htonl(vnode->fid.unique);
+	bp[4] = htonl(acl->size);
+	memcpy(&bp[5], acl->data, acl->size);
+	if (acl->size != size)
+		memset((void *)&bp[5] + acl->size, 0, size - acl->size);
+
+	trace_afs_make_fs_call(call, &vnode->fid);
+	afs_make_call(&fc->ac, call, GFP_KERNEL);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
diff --git a/fs/afs/inode.c b/fs/afs/inode.c
index 1a4ce07fb406..7b1c18c32f48 100644
--- a/fs/afs/inode.c
+++ b/fs/afs/inode.c
@@ -23,47 +23,96 @@
 #include <linux/namei.h>
 #include <linux/iversion.h>
 #include "internal.h"
+#include "afs_fs.h"
 
 static const struct inode_operations afs_symlink_inode_operations = {
 	.get_link	= page_get_link,
 	.listxattr	= afs_listxattr,
 };
 
+static noinline void dump_vnode(struct afs_vnode *vnode, struct afs_vnode *parent_vnode)
+{
+	static unsigned long once_only;
+
+	pr_warn("kAFS: AFS vnode with undefined type %u\n",
+		vnode->status.type);
+	pr_warn("kAFS: A=%d m=%o s=%llx v=%llx\n",
+		vnode->status.abort_code,
+		vnode->status.mode,
+		vnode->status.size,
+		vnode->status.data_version);
+	pr_warn("kAFS: vnode %llx:%llx:%x\n",
+		vnode->fid.vid,
+		vnode->fid.vnode,
+		vnode->fid.unique);
+	if (parent_vnode)
+		pr_warn("kAFS: dir %llx:%llx:%x\n",
+			parent_vnode->fid.vid,
+			parent_vnode->fid.vnode,
+			parent_vnode->fid.unique);
+
+	if (!test_and_set_bit(0, &once_only))
+		dump_stack();
+}
+
+/*
+ * Set the file size and block count.  Estimate the number of 512 bytes blocks
+ * used, rounded up to nearest 1K for consistency with other AFS clients.
+ */
+static void afs_set_i_size(struct afs_vnode *vnode, u64 size)
+{
+	i_size_write(&vnode->vfs_inode, size);
+	vnode->vfs_inode.i_blocks = ((size + 1023) >> 10) << 1;
+}
+
 /*
  * Initialise an inode from the vnode status.
  */
-static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key)
+static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key,
+				      struct afs_cb_interest *cbi,
+				      struct afs_vnode *parent_vnode,
+				      struct afs_status_cb *scb)
 {
+	struct afs_cb_interest *old_cbi = NULL;
+	struct afs_file_status *status = &scb->status;
 	struct inode *inode = AFS_VNODE_TO_I(vnode);
+	struct timespec64 t;
 
 	_debug("FS: ft=%d lk=%d sz=%llu ver=%Lu mod=%hu",
-	       vnode->status.type,
-	       vnode->status.nlink,
-	       (unsigned long long) vnode->status.size,
-	       vnode->status.data_version,
-	       vnode->status.mode);
+	       status->type,
+	       status->nlink,
+	       (unsigned long long) status->size,
+	       status->data_version,
+	       status->mode);
+
+	write_seqlock(&vnode->cb_lock);
 
-	read_seqlock_excl(&vnode->cb_lock);
+	vnode->status = *status;
 
-	afs_update_inode_from_status(vnode, &vnode->status, NULL,
-				     AFS_VNODE_NOT_YET_SET);
+	t = status->mtime_client;
+	inode->i_ctime = t;
+	inode->i_mtime = t;
+	inode->i_atime = t;
+	inode->i_uid = make_kuid(&init_user_ns, status->owner);
+	inode->i_gid = make_kgid(&init_user_ns, status->group);
+	set_nlink(&vnode->vfs_inode, status->nlink);
 
-	switch (vnode->status.type) {
+	switch (status->type) {
 	case AFS_FTYPE_FILE:
-		inode->i_mode	= S_IFREG | vnode->status.mode;
+		inode->i_mode	= S_IFREG | status->mode;
 		inode->i_op	= &afs_file_inode_operations;
 		inode->i_fop	= &afs_file_operations;
 		inode->i_mapping->a_ops	= &afs_fs_aops;
 		break;
 	case AFS_FTYPE_DIR:
-		inode->i_mode	= S_IFDIR | vnode->status.mode;
+		inode->i_mode	= S_IFDIR | status->mode;
 		inode->i_op	= &afs_dir_inode_operations;
 		inode->i_fop	= &afs_dir_file_operations;
 		inode->i_mapping->a_ops	= &afs_dir_aops;
 		break;
 	case AFS_FTYPE_SYMLINK:
 		/* Symlinks with a mode of 0644 are actually mountpoints. */
-		if ((vnode->status.mode & 0777) == 0644) {
+		if ((status->mode & 0777) == 0644) {
 			inode->i_flags |= S_AUTOMOUNT;
 
 			set_bit(AFS_VNODE_MOUNTPOINT, &vnode->flags);
@@ -73,30 +122,189 @@ static int afs_inode_init_from_status(struct afs_vnode *vnode, struct key *key)
 			inode->i_fop	= &afs_mntpt_file_operations;
 			inode->i_mapping->a_ops	= &afs_fs_aops;
 		} else {
-			inode->i_mode	= S_IFLNK | vnode->status.mode;
+			inode->i_mode	= S_IFLNK | status->mode;
 			inode->i_op	= &afs_symlink_inode_operations;
 			inode->i_mapping->a_ops	= &afs_fs_aops;
 		}
 		inode_nohighmem(inode);
 		break;
 	default:
-		printk("kAFS: AFS vnode with undefined type\n");
-		read_sequnlock_excl(&vnode->cb_lock);
+		dump_vnode(vnode, parent_vnode);
+		write_sequnlock(&vnode->cb_lock);
 		return afs_protocol_error(NULL, -EBADMSG, afs_eproto_file_type);
 	}
 
-	inode->i_blocks		= 0;
-	vnode->invalid_before	= vnode->status.data_version;
+	afs_set_i_size(vnode, status->size);
+
+	vnode->invalid_before	= status->data_version;
+	inode_set_iversion_raw(&vnode->vfs_inode, status->data_version);
+
+	if (!scb->have_cb) {
+		/* it's a symlink we just created (the fileserver
+		 * didn't give us a callback) */
+		vnode->cb_expires_at = ktime_get_real_seconds();
+	} else {
+		vnode->cb_expires_at = scb->callback.expires_at;
+		old_cbi = rcu_dereference_protected(vnode->cb_interest,
+						    lockdep_is_held(&vnode->cb_lock.lock));
+		if (cbi != old_cbi)
+			rcu_assign_pointer(vnode->cb_interest, afs_get_cb_interest(cbi));
+		else
+			old_cbi = NULL;
+		set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
+	}
 
-	read_sequnlock_excl(&vnode->cb_lock);
+	write_sequnlock(&vnode->cb_lock);
+	afs_put_cb_interest(afs_v2net(vnode), old_cbi);
 	return 0;
 }
 
 /*
+ * Update the core inode struct from a returned status record.
+ */
+static void afs_apply_status(struct afs_fs_cursor *fc,
+			     struct afs_vnode *vnode,
+			     struct afs_status_cb *scb,
+			     const afs_dataversion_t *expected_version)
+{
+	struct afs_file_status *status = &scb->status;
+	struct timespec64 t;
+	umode_t mode;
+	bool data_changed = false;
+
+	BUG_ON(test_bit(AFS_VNODE_UNSET, &vnode->flags));
+
+	if (status->type != vnode->status.type) {
+		pr_warning("Vnode %llx:%llx:%x changed type %u to %u\n",
+			   vnode->fid.vid,
+			   vnode->fid.vnode,
+			   vnode->fid.unique,
+			   status->type, vnode->status.type);
+		afs_protocol_error(NULL, -EBADMSG, afs_eproto_bad_status);
+		return;
+	}
+
+	if (status->nlink != vnode->status.nlink)
+		set_nlink(&vnode->vfs_inode, status->nlink);
+
+	if (status->owner != vnode->status.owner)
+		vnode->vfs_inode.i_uid = make_kuid(&init_user_ns, status->owner);
+
+	if (status->group != vnode->status.group)
+		vnode->vfs_inode.i_gid = make_kgid(&init_user_ns, status->group);
+
+	if (status->mode != vnode->status.mode) {
+		mode = vnode->vfs_inode.i_mode;
+		mode &= ~S_IALLUGO;
+		mode |= status->mode;
+		WRITE_ONCE(vnode->vfs_inode.i_mode, mode);
+	}
+
+	t = status->mtime_client;
+	vnode->vfs_inode.i_ctime = t;
+	vnode->vfs_inode.i_mtime = t;
+	vnode->vfs_inode.i_atime = t;
+
+	if (vnode->status.data_version != status->data_version)
+		data_changed = true;
+
+	vnode->status = *status;
+
+	if (expected_version &&
+	    *expected_version != status->data_version) {
+		if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags))
+			pr_warn("kAFS: vnode modified {%llx:%llu} %llx->%llx %s\n",
+				vnode->fid.vid, vnode->fid.vnode,
+				(unsigned long long)*expected_version,
+				(unsigned long long)status->data_version,
+				fc->type ? fc->type->name : "???");
+
+		vnode->invalid_before = status->data_version;
+		if (vnode->status.type == AFS_FTYPE_DIR) {
+			if (test_and_clear_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
+				afs_stat_v(vnode, n_inval);
+		} else {
+			set_bit(AFS_VNODE_ZAP_DATA, &vnode->flags);
+		}
+	} else if (vnode->status.type == AFS_FTYPE_DIR) {
+		/* Expected directory change is handled elsewhere so
+		 * that we can locally edit the directory and save on a
+		 * download.
+		 */
+		if (test_bit(AFS_VNODE_DIR_VALID, &vnode->flags))
+			data_changed = false;
+	}
+
+	if (data_changed) {
+		inode_set_iversion_raw(&vnode->vfs_inode, status->data_version);
+		afs_set_i_size(vnode, status->size);
+	}
+}
+
+/*
+ * Apply a callback to a vnode.
+ */
+static void afs_apply_callback(struct afs_fs_cursor *fc,
+			       struct afs_vnode *vnode,
+			       struct afs_status_cb *scb,
+			       unsigned int cb_break)
+{
+	struct afs_cb_interest *old;
+	struct afs_callback *cb = &scb->callback;
+
+	if (!afs_cb_is_broken(cb_break, vnode, fc->cbi)) {
+		vnode->cb_expires_at	= cb->expires_at;
+		old = rcu_dereference_protected(vnode->cb_interest,
+						lockdep_is_held(&vnode->cb_lock.lock));
+		if (old != fc->cbi) {
+			rcu_assign_pointer(vnode->cb_interest, afs_get_cb_interest(fc->cbi));
+			afs_put_cb_interest(afs_v2net(vnode), old);
+		}
+		set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
+	}
+}
+
+/*
+ * Apply the received status and callback to an inode all in the same critical
+ * section to avoid races with afs_validate().
+ */
+void afs_vnode_commit_status(struct afs_fs_cursor *fc,
+			     struct afs_vnode *vnode,
+			     unsigned int cb_break,
+			     const afs_dataversion_t *expected_version,
+			     struct afs_status_cb *scb)
+{
+	if (fc->ac.error != 0)
+		return;
+
+	write_seqlock(&vnode->cb_lock);
+
+	if (scb->have_error) {
+		if (scb->status.abort_code == VNOVNODE) {
+			set_bit(AFS_VNODE_DELETED, &vnode->flags);
+			clear_nlink(&vnode->vfs_inode);
+			__afs_break_callback(vnode, afs_cb_break_for_deleted);
+		}
+	} else {
+		if (scb->have_status)
+			afs_apply_status(fc, vnode, scb, expected_version);
+		if (scb->have_cb)
+			afs_apply_callback(fc, vnode, scb, cb_break);
+	}
+
+	write_sequnlock(&vnode->cb_lock);
+
+	if (fc->ac.error == 0 && scb->have_status)
+		afs_cache_permit(vnode, fc->key, cb_break, scb);
+}
+
+/*
  * Fetch file status from the volume.
  */
-int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool new_inode)
+int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool is_new,
+		     afs_access_t *_caller_access)
 {
+	struct afs_status_cb *scb;
 	struct afs_fs_cursor fc;
 	int ret;
 
@@ -105,18 +313,38 @@ int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool new_inode)
 	       vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique,
 	       vnode->flags);
 
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		return -ENOMEM;
+
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, vnode, key)) {
+	if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
+		afs_dataversion_t data_version = vnode->status.data_version;
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(vnode);
-			afs_fs_fetch_file_status(&fc, NULL, new_inode);
+			afs_fs_fetch_file_status(&fc, scb, NULL);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+		if (fc.error) {
+			/* Do nothing. */
+		} else if (is_new) {
+			ret = afs_inode_init_from_status(vnode, key, fc.cbi,
+							 NULL, scb);
+			fc.error = ret;
+			if (ret == 0)
+				afs_cache_permit(vnode, key, fc.cb_break, scb);
+		} else {
+			afs_vnode_commit_status(&fc, vnode, fc.cb_break,
+						&data_version, scb);
+		}
+		afs_check_for_remote_deletion(&fc, vnode);
 		ret = afs_end_vnode_operation(&fc);
 	}
 
+	if (ret == 0 && _caller_access)
+		*_caller_access = scb->status.caller_access;
+	kfree(scb);
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -126,10 +354,10 @@ int afs_fetch_status(struct afs_vnode *vnode, struct key *key, bool new_inode)
  */
 int afs_iget5_test(struct inode *inode, void *opaque)
 {
-	struct afs_iget_data *data = opaque;
+	struct afs_iget_data *iget_data = opaque;
 	struct afs_vnode *vnode = AFS_FS_I(inode);
 
-	return memcmp(&vnode->fid, &data->fid, sizeof(data->fid)) == 0;
+	return memcmp(&vnode->fid, &iget_data->fid, sizeof(iget_data->fid)) == 0;
 }
 
 /*
@@ -147,17 +375,19 @@ static int afs_iget5_pseudo_dir_test(struct inode *inode, void *opaque)
  */
 static int afs_iget5_set(struct inode *inode, void *opaque)
 {
-	struct afs_iget_data *data = opaque;
+	struct afs_iget_data *iget_data = opaque;
 	struct afs_vnode *vnode = AFS_FS_I(inode);
 
-	vnode->fid = data->fid;
-	vnode->volume = data->volume;
+	vnode->fid		= iget_data->fid;
+	vnode->volume		= iget_data->volume;
+	vnode->cb_v_break	= iget_data->cb_v_break;
+	vnode->cb_s_break	= iget_data->cb_s_break;
 
 	/* YFS supports 96-bit vnode IDs, but Linux only supports
 	 * 64-bit inode numbers.
 	 */
-	inode->i_ino = data->fid.vnode;
-	inode->i_generation = data->fid.unique;
+	inode->i_ino		= iget_data->fid.vnode;
+	inode->i_generation	= iget_data->fid.unique;
 	return 0;
 }
 
@@ -167,38 +397,42 @@ static int afs_iget5_set(struct inode *inode, void *opaque)
  */
 struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root)
 {
-	struct afs_iget_data data;
 	struct afs_super_info *as;
 	struct afs_vnode *vnode;
 	struct inode *inode;
 	static atomic_t afs_autocell_ino;
 
+	struct afs_iget_data iget_data = {
+		.cb_v_break = 0,
+		.cb_s_break = 0,
+	};
+
 	_enter("");
 
 	as = sb->s_fs_info;
 	if (as->volume) {
-		data.volume = as->volume;
-		data.fid.vid = as->volume->vid;
+		iget_data.volume = as->volume;
+		iget_data.fid.vid = as->volume->vid;
 	}
 	if (root) {
-		data.fid.vnode = 1;
-		data.fid.unique = 1;
+		iget_data.fid.vnode = 1;
+		iget_data.fid.unique = 1;
 	} else {
-		data.fid.vnode = atomic_inc_return(&afs_autocell_ino);
-		data.fid.unique = 0;
+		iget_data.fid.vnode = atomic_inc_return(&afs_autocell_ino);
+		iget_data.fid.unique = 0;
 	}
 
-	inode = iget5_locked(sb, data.fid.vnode,
+	inode = iget5_locked(sb, iget_data.fid.vnode,
 			     afs_iget5_pseudo_dir_test, afs_iget5_set,
-			     &data);
+			     &iget_data);
 	if (!inode) {
 		_leave(" = -ENOMEM");
 		return ERR_PTR(-ENOMEM);
 	}
 
 	_debug("GOT INODE %p { ino=%lu, vl=%llx, vn=%llx, u=%x }",
-	       inode, inode->i_ino, data.fid.vid, data.fid.vnode,
-	       data.fid.unique);
+	       inode, inode->i_ino, iget_data.fid.vid, iget_data.fid.vnode,
+	       iget_data.fid.unique);
 
 	vnode = AFS_FS_I(inode);
 
@@ -216,9 +450,7 @@ struct inode *afs_iget_pseudo_dir(struct super_block *sb, bool root)
 	set_nlink(inode, 2);
 	inode->i_uid		= GLOBAL_ROOT_UID;
 	inode->i_gid		= GLOBAL_ROOT_GID;
-	inode->i_ctime.tv_sec	= get_seconds();
-	inode->i_ctime.tv_nsec	= 0;
-	inode->i_atime		= inode->i_mtime = inode->i_ctime;
+	inode->i_ctime = inode->i_atime = inode->i_mtime = current_time(inode);
 	inode->i_blocks		= 0;
 	inode_set_iversion_raw(inode, 0);
 	inode->i_generation	= 0;
@@ -271,22 +503,24 @@ static void afs_get_inode_cache(struct afs_vnode *vnode)
  * inode retrieval
  */
 struct inode *afs_iget(struct super_block *sb, struct key *key,
-		       struct afs_fid *fid, struct afs_file_status *status,
-		       struct afs_callback *cb, struct afs_cb_interest *cbi)
+		       struct afs_iget_data *iget_data,
+		       struct afs_status_cb *scb,
+		       struct afs_cb_interest *cbi,
+		       struct afs_vnode *parent_vnode)
 {
-	struct afs_iget_data data = { .fid = *fid };
 	struct afs_super_info *as;
 	struct afs_vnode *vnode;
+	struct afs_fid *fid = &iget_data->fid;
 	struct inode *inode;
 	int ret;
 
 	_enter(",{%llx:%llu.%u},,", fid->vid, fid->vnode, fid->unique);
 
 	as = sb->s_fs_info;
-	data.volume = as->volume;
+	iget_data->volume = as->volume;
 
 	inode = iget5_locked(sb, fid->vnode, afs_iget5_test, afs_iget5_set,
-			     &data);
+			     iget_data);
 	if (!inode) {
 		_leave(" = -ENOMEM");
 		return ERR_PTR(-ENOMEM);
@@ -303,43 +537,25 @@ struct inode *afs_iget(struct super_block *sb, struct key *key,
 		return inode;
 	}
 
-	if (!status) {
+	if (!scb) {
 		/* it's a remotely extant inode */
-		ret = afs_fetch_status(vnode, key, true);
+		ret = afs_fetch_status(vnode, key, true, NULL);
 		if (ret < 0)
 			goto bad_inode;
 	} else {
-		/* it's an inode we just created */
-		memcpy(&vnode->status, status, sizeof(vnode->status));
-
-		if (!cb) {
-			/* it's a symlink we just created (the fileserver
-			 * didn't give us a callback) */
-			vnode->cb_version = 0;
-			vnode->cb_type = 0;
-			vnode->cb_expires_at = ktime_get();
-		} else {
-			vnode->cb_version = cb->version;
-			vnode->cb_type = cb->type;
-			vnode->cb_expires_at = cb->expires_at;
-			vnode->cb_interest = afs_get_cb_interest(cbi);
-			set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
-		}
-
-		vnode->cb_expires_at += ktime_get_real_seconds();
+		ret = afs_inode_init_from_status(vnode, key, cbi, parent_vnode,
+						 scb);
+		if (ret < 0)
+			goto bad_inode;
 	}
 
-	ret = afs_inode_init_from_status(vnode, key);
-	if (ret < 0)
-		goto bad_inode;
-
 	afs_get_inode_cache(vnode);
 
 	/* success */
 	clear_bit(AFS_VNODE_UNSET, &vnode->flags);
 	inode->i_flags |= S_NOATIME;
 	unlock_new_inode(inode);
-	_leave(" = %p [CB { v=%u t=%u }]", inode, vnode->cb_version, vnode->cb_type);
+	_leave(" = %p", inode);
 	return inode;
 
 	/* failure */
@@ -371,6 +587,69 @@ void afs_zap_data(struct afs_vnode *vnode)
 }
 
 /*
+ * Check the validity of a vnode/inode.
+ */
+bool afs_check_validity(struct afs_vnode *vnode)
+{
+	struct afs_cb_interest *cbi;
+	struct afs_server *server;
+	struct afs_volume *volume = vnode->volume;
+	enum afs_cb_break_reason need_clear = afs_cb_break_no_break;
+	time64_t now = ktime_get_real_seconds();
+	bool valid;
+	unsigned int cb_break, cb_s_break, cb_v_break;
+	int seq = 0;
+
+	do {
+		read_seqbegin_or_lock(&vnode->cb_lock, &seq);
+		cb_v_break = READ_ONCE(volume->cb_v_break);
+		cb_break = vnode->cb_break;
+
+		if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
+			cbi = rcu_dereference(vnode->cb_interest);
+			server = rcu_dereference(cbi->server);
+			cb_s_break = READ_ONCE(server->cb_s_break);
+
+			if (vnode->cb_s_break != cb_s_break ||
+			    vnode->cb_v_break != cb_v_break) {
+				vnode->cb_s_break = cb_s_break;
+				vnode->cb_v_break = cb_v_break;
+				need_clear = afs_cb_break_for_vsbreak;
+				valid = false;
+			} else if (test_bit(AFS_VNODE_ZAP_DATA, &vnode->flags)) {
+				need_clear = afs_cb_break_for_zap;
+				valid = false;
+			} else if (vnode->cb_expires_at - 10 <= now) {
+				need_clear = afs_cb_break_for_lapsed;
+				valid = false;
+			} else {
+				valid = true;
+			}
+		} else if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
+			valid = true;
+		} else {
+			vnode->cb_v_break = cb_v_break;
+			valid = false;
+		}
+
+	} while (need_seqretry(&vnode->cb_lock, seq));
+
+	done_seqretry(&vnode->cb_lock, seq);
+
+	if (need_clear != afs_cb_break_no_break) {
+		write_seqlock(&vnode->cb_lock);
+		if (cb_break == vnode->cb_break)
+			__afs_break_callback(vnode, need_clear);
+		else
+			trace_afs_cb_miss(&vnode->fid, need_clear);
+		write_sequnlock(&vnode->cb_lock);
+		valid = false;
+	}
+
+	return valid;
+}
+
+/*
  * validate a vnode/inode
  * - there are several things we need to check
  *   - parent dir data changes (rm, rmdir, rename, mkdir, create, link,
@@ -381,7 +660,6 @@ void afs_zap_data(struct afs_vnode *vnode)
  */
 int afs_validate(struct afs_vnode *vnode, struct key *key)
 {
-	time64_t now = ktime_get_real_seconds();
 	bool valid;
 	int ret;
 
@@ -389,36 +667,9 @@ int afs_validate(struct afs_vnode *vnode, struct key *key)
 	       vnode->fid.vid, vnode->fid.vnode, vnode->flags,
 	       key_serial(key));
 
-	/* Quickly check the callback state.  Ideally, we'd use read_seqbegin
-	 * here, but we have no way to pass the net namespace to the RCU
-	 * cleanup for the server record.
-	 */
-	read_seqlock_excl(&vnode->cb_lock);
-
-	if (test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
-		if (vnode->cb_s_break != vnode->cb_interest->server->cb_s_break ||
-		    vnode->cb_v_break != vnode->volume->cb_v_break) {
-			vnode->cb_s_break = vnode->cb_interest->server->cb_s_break;
-			vnode->cb_v_break = vnode->volume->cb_v_break;
-			valid = false;
-		} else if (vnode->status.type == AFS_FTYPE_DIR &&
-			   (!test_bit(AFS_VNODE_DIR_VALID, &vnode->flags) ||
-			    vnode->cb_expires_at - 10 <= now)) {
-			valid = false;
-		} else if (test_bit(AFS_VNODE_ZAP_DATA, &vnode->flags) ||
-			   vnode->cb_expires_at - 10 <= now) {
-			valid = false;
-		} else {
-			valid = true;
-		}
-	} else if (test_bit(AFS_VNODE_DELETED, &vnode->flags)) {
-		valid = true;
-	} else {
-		vnode->cb_v_break = vnode->volume->cb_v_break;
-		valid = false;
-	}
-
-	read_sequnlock_excl(&vnode->cb_lock);
+	rcu_read_lock();
+	valid = afs_check_validity(vnode);
+	rcu_read_unlock();
 
 	if (test_bit(AFS_VNODE_DELETED, &vnode->flags))
 		clear_nlink(&vnode->vfs_inode);
@@ -434,7 +685,7 @@ int afs_validate(struct afs_vnode *vnode, struct key *key)
 	 * access */
 	if (!test_bit(AFS_VNODE_CB_PROMISED, &vnode->flags)) {
 		_debug("not promised");
-		ret = afs_fetch_status(vnode, key, false);
+		ret = afs_fetch_status(vnode, key, false, NULL);
 		if (ret < 0) {
 			if (ret == -ENOENT) {
 				set_bit(AFS_VNODE_DELETED, &vnode->flags);
@@ -505,6 +756,7 @@ int afs_drop_inode(struct inode *inode)
  */
 void afs_evict_inode(struct inode *inode)
 {
+	struct afs_cb_interest *cbi;
 	struct afs_vnode *vnode;
 
 	vnode = AFS_FS_I(inode);
@@ -521,10 +773,14 @@ void afs_evict_inode(struct inode *inode)
 	truncate_inode_pages_final(&inode->i_data);
 	clear_inode(inode);
 
-	if (vnode->cb_interest) {
-		afs_put_cb_interest(afs_i2net(inode), vnode->cb_interest);
-		vnode->cb_interest = NULL;
+	write_seqlock(&vnode->cb_lock);
+	cbi = rcu_dereference_protected(vnode->cb_interest,
+					lockdep_is_held(&vnode->cb_lock.lock));
+	if (cbi) {
+		afs_put_cb_interest(afs_i2net(inode), cbi);
+		rcu_assign_pointer(vnode->cb_interest, NULL);
 	}
+	write_sequnlock(&vnode->cb_lock);
 
 	while (!list_empty(&vnode->wb_keys)) {
 		struct afs_wb_key *wbk = list_entry(vnode->wb_keys.next,
@@ -544,7 +800,10 @@ void afs_evict_inode(struct inode *inode)
 	}
 #endif
 
+	afs_prune_wb_keys(vnode);
 	afs_put_permits(rcu_access_pointer(vnode->permit_cache));
+	key_put(vnode->silly_key);
+	vnode->silly_key = NULL;
 	key_put(vnode->lock_key);
 	vnode->lock_key = NULL;
 	_leave("");
@@ -556,9 +815,10 @@ void afs_evict_inode(struct inode *inode)
 int afs_setattr(struct dentry *dentry, struct iattr *attr)
 {
 	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
 	struct afs_vnode *vnode = AFS_FS_I(d_inode(dentry));
 	struct key *key;
-	int ret;
+	int ret = -ENOMEM;
 
 	_enter("{%llx:%llu},{n=%pd},%x",
 	       vnode->fid.vid, vnode->fid.vnode, dentry,
@@ -570,6 +830,10 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr)
 		return 0;
 	}
 
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_KERNEL);
+	if (!scb)
+		goto error;
+
 	/* flush any dirty data outstanding on a regular file */
 	if (S_ISREG(vnode->vfs_inode.i_mode))
 		filemap_write_and_wait(vnode->vfs_inode.i_mapping);
@@ -580,25 +844,33 @@ int afs_setattr(struct dentry *dentry, struct iattr *attr)
 		key = afs_request_key(vnode->volume->cell);
 		if (IS_ERR(key)) {
 			ret = PTR_ERR(key);
-			goto error;
+			goto error_scb;
 		}
 	}
 
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, vnode, key)) {
+	if (afs_begin_vnode_operation(&fc, vnode, key, false)) {
+		afs_dataversion_t data_version = vnode->status.data_version;
+
+		if (attr->ia_valid & ATTR_SIZE)
+			data_version++;
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(vnode);
-			afs_fs_setattr(&fc, attr);
+			afs_fs_setattr(&fc, attr, scb);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+		afs_check_for_remote_deletion(&fc, vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break,
+					&data_version, scb);
 		ret = afs_end_vnode_operation(&fc);
 	}
 
 	if (!(attr->ia_valid & ATTR_FILE))
 		key_put(key);
 
+error_scb:
+	kfree(scb);
 error:
 	_leave(" = %d", ret);
 	return ret;
diff --git a/fs/afs/internal.h b/fs/afs/internal.h
index 8871b9e8645f..f66a3be12fd6 100644
--- a/fs/afs/internal.h
+++ b/fs/afs/internal.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* internal AFS stuff
  *
  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/compiler.h>
@@ -36,15 +32,27 @@
 struct pagevec;
 struct afs_call;
 
-struct afs_mount_params {
-	bool			rwpath;		/* T if the parent should be considered R/W */
+/*
+ * Partial file-locking emulation mode.  (The problem being that AFS3 only
+ * allows whole-file locks and no upgrading/downgrading).
+ */
+enum afs_flock_mode {
+	afs_flock_mode_unset,
+	afs_flock_mode_local,	/* Local locking only */
+	afs_flock_mode_openafs,	/* Don't get server lock for a partial lock */
+	afs_flock_mode_strict,	/* Always get a server lock for a partial lock */
+	afs_flock_mode_write,	/* Get an exclusive server lock for a partial lock */
+};
+
+struct afs_fs_context {
 	bool			force;		/* T to force cell type */
 	bool			autocell;	/* T if set auto mount operation */
 	bool			dyn_root;	/* T if dynamic root */
+	bool			no_cell;	/* T if the source is "none" (for dynroot) */
+	enum afs_flock_mode	flock_mode;	/* Partial file-locking emulation mode */
 	afs_voltype_t		type;		/* type of volume requested */
-	int			volnamesz;	/* size of volume name */
+	unsigned int		volnamesz;	/* size of volume name */
 	const char		*volname;	/* name of volume to mount */
-	struct net		*net_ns;	/* Network namespace in effect */
 	struct afs_net		*net;		/* the AFS net namespace stuff */
 	struct afs_cell		*cell;		/* cell in which to find volume */
 	struct afs_volume	*volume;	/* volume record */
@@ -54,6 +62,8 @@ struct afs_mount_params {
 struct afs_iget_data {
 	struct afs_fid		fid;
 	struct afs_volume	*volume;	/* volume on which resides */
+	unsigned int		cb_v_break;	/* Pre-fetch volume break count */
+	unsigned int		cb_s_break;	/* Pre-fetch server break count */
 };
 
 enum afs_call_state {
@@ -99,8 +109,10 @@ struct afs_call {
 	struct rxrpc_call	*rxcall;	/* RxRPC call handle */
 	struct key		*key;		/* security for this call */
 	struct afs_net		*net;		/* The network namespace */
-	struct afs_server	*cm_server;	/* Server affected by incoming CM call */
+	struct afs_server	*server;	/* The fileserver record if fs op (pins ref) */
+	struct afs_vlserver	*vlserver;	/* The vlserver record if vl op */
 	struct afs_cb_interest	*cbi;		/* Callback interest for server used */
+	struct afs_vnode	*lvnode;	/* vnode being locked */
 	void			*request;	/* request data (first part) */
 	struct address_space	*mapping;	/* Pages being written from */
 	struct iov_iter		iter;		/* Buffer iterator */
@@ -110,7 +122,20 @@ struct afs_call {
 		struct bio_vec	bvec[1];
 	};
 	void			*buffer;	/* reply receive buffer */
-	void			*reply[4];	/* Where to put the reply */
+	union {
+		long			ret0;	/* Value to reply with instead of 0 */
+		struct afs_addr_list	*ret_alist;
+		struct afs_vldb_entry	*ret_vldb;
+		struct afs_acl		*ret_acl;
+	};
+	struct afs_fid		*out_fid;
+	struct afs_status_cb	*out_dir_scb;
+	struct afs_status_cb	*out_scb;
+	struct yfs_acl		*out_yacl;
+	struct afs_volsync	*out_volsync;
+	struct afs_volume_status *out_volstatus;
+	struct afs_read		*read_request;
+	unsigned int		server_index;
 	pgoff_t			first;		/* first page in mapping to deal with */
 	pgoff_t			last;		/* last page in mapping to deal with */
 	atomic_t		usage;
@@ -119,10 +144,10 @@ struct afs_call {
 	int			error;		/* error code */
 	u32			abort_code;	/* Remote abort ID or 0 */
 	u32			epoch;
+	unsigned int		max_lifespan;	/* Maximum lifespan to set if not 0 */
 	unsigned		request_size;	/* size of request data */
 	unsigned		reply_max;	/* maximum size of reply */
 	unsigned		first_offset;	/* offset into mapping[first] */
-	unsigned int		cb_break;	/* cb_break + cb_s_break before the call */
 	union {
 		unsigned	last_to;	/* amount of mapping[last] */
 		unsigned	count2;		/* count used in unmarshalling */
@@ -133,9 +158,9 @@ struct afs_call {
 	bool			send_pages;	/* T if data from mapping should be sent */
 	bool			need_attention;	/* T if RxRPC poked us */
 	bool			async;		/* T if asynchronous */
-	bool			ret_reply0;	/* T if should return reply[0] on success */
 	bool			upgrade;	/* T to request service upgrade */
-	bool			want_reply_time; /* T if want reply_time */
+	bool			have_reply_time; /* T if have got reply_time */
+	bool			intr;		/* T if interruptible */
 	u16			service_id;	/* Actual service ID (after upgrade) */
 	unsigned int		debug_id;	/* Trace ID */
 	u32			operation_ID;	/* operation ID for an incoming call */
@@ -147,8 +172,6 @@ struct afs_call {
 		} __attribute__((packed));
 		__be64		tmp64;
 	};
-	afs_dataversion_t	expected_version; /* Updated version expected from store */
-	afs_dataversion_t	expected_version_2; /* 2nd updated version expected from store */
 	ktime_t			reply_time;	/* Time of first reply packet */
 };
 
@@ -209,7 +232,8 @@ struct afs_read {
 	unsigned int		index;		/* Which page we're reading into */
 	unsigned int		nr_pages;
 	unsigned int		offset;		/* offset into current page */
-	void (*page_done)(struct afs_call *, struct afs_read *);
+	struct afs_vnode	*vnode;
+	void (*page_done)(struct afs_read *);
 	struct page		**pages;
 	struct page		*array[];
 };
@@ -222,6 +246,7 @@ struct afs_super_info {
 	struct net		*net_ns;	/* Network namespace */
 	struct afs_cell		*cell;		/* The cell in which the volume resides */
 	struct afs_volume	*volume;	/* volume record */
+	enum afs_flock_mode	flock_mode:8;	/* File locking emulation mode */
 	bool			dyn_root;	/* True if dynamic root */
 };
 
@@ -354,13 +379,13 @@ struct afs_cell {
 	time64_t		last_inactive;	/* Time of last drop of usage count */
 	atomic_t		usage;
 	unsigned long		flags;
-#define AFS_CELL_FL_NOT_READY	0		/* The cell record is not ready for use */
-#define AFS_CELL_FL_NO_GC	1		/* The cell was added manually, don't auto-gc */
-#define AFS_CELL_FL_NOT_FOUND	2		/* Permanent DNS error */
-#define AFS_CELL_FL_DNS_FAIL	3		/* Failed to access DNS */
-#define AFS_CELL_FL_NO_LOOKUP_YET 4		/* Not completed first DNS lookup yet */
+#define AFS_CELL_FL_NO_GC	0		/* The cell was added manually, don't auto-gc */
+#define AFS_CELL_FL_DO_LOOKUP	1		/* DNS lookup requested */
 	enum afs_cell_state	state;
 	short			error;
+	enum dns_record_source	dns_source:8;	/* Latest source of data from lookup */
+	enum dns_lookup_status	dns_status:8;	/* Latest status of data from lookup */
+	unsigned int		dns_lookup_count; /* Counter of DNS lookups */
 
 	/* Active fileserver interaction state. */
 	struct list_head	proc_volumes;	/* procfs volume list */
@@ -475,7 +500,6 @@ struct afs_server {
 	time64_t		put_time;	/* Time at which last put */
 	time64_t		update_at;	/* Time at which to next update the record */
 	unsigned long		flags;
-#define AFS_SERVER_FL_NEW	0		/* New server, don't inc cb_s_break */
 #define AFS_SERVER_FL_NOT_READY	1		/* The record is not ready for use */
 #define AFS_SERVER_FL_NOT_FOUND	2		/* VL server says no such server */
 #define AFS_SERVER_FL_VL_FAIL	3		/* Failed to access VL server */
@@ -490,6 +514,7 @@ struct afs_server {
 	atomic_t		usage;
 	u32			addr_version;	/* Address list version */
 	u32			cm_epoch;	/* Server RxRPC epoch */
+	unsigned int		debug_id;	/* Debugging ID for traces */
 
 	/* file service access */
 	rwlock_t		fs_lock;	/* access lock */
@@ -526,7 +551,10 @@ struct afs_server {
 struct afs_vol_interest {
 	struct hlist_node	srv_link;	/* Link in server->cb_volumes */
 	struct hlist_head	cb_interests;	/* List of callback interests on the server */
-	afs_volid_t		vid;		/* Volume ID to match */
+	union {
+		struct rcu_head	rcu;
+		afs_volid_t	vid;		/* Volume ID to match */
+	};
 	unsigned int		usage;
 };
 
@@ -538,7 +566,10 @@ struct afs_cb_interest {
 	struct afs_vol_interest	*vol_interest;
 	struct afs_server	*server;	/* Server on which this interest resides */
 	struct super_block	*sb;		/* Superblock on which inodes reside */
-	afs_volid_t		vid;		/* Volume ID to match */
+	union {
+		struct rcu_head	rcu;
+		afs_volid_t	vid;		/* Volume ID to match */
+	};
 	refcount_t		usage;
 };
 
@@ -584,7 +615,7 @@ struct afs_volume {
 	unsigned int		servers_seq;	/* Incremented each time ->servers changes */
 
 	unsigned		cb_v_break;	/* Break-everything counter. */
-	rwlock_t		cb_break_lock;
+	rwlock_t		cb_v_break_lock;
 
 	afs_voltype_t		type;		/* type of volume */
 	short			error;
@@ -601,6 +632,7 @@ enum afs_lock_state {
 	AFS_VNODE_LOCK_EXTENDING,	/* We're extending a lock on the server */
 	AFS_VNODE_LOCK_NEED_UNLOCK,	/* We need to unlock on the server */
 	AFS_VNODE_LOCK_UNLOCKING,	/* We're telling the server to unlock */
+	AFS_VNODE_LOCK_DELETED,		/* The vnode has been deleted whilst we have a lock */
 };
 
 /*
@@ -622,6 +654,8 @@ struct afs_vnode {
 	struct afs_permits __rcu *permit_cache;	/* cache of permits so far obtained */
 	struct mutex		io_lock;	/* Lock for serialising I/O on this mutex */
 	struct rw_semaphore	validate_lock;	/* lock for validating this vnode */
+	struct rw_semaphore	rmdir_lock;	/* Lock for rmdir vs sillyrename */
+	struct key		*silly_key;	/* Silly rename key */
 	spinlock_t		wb_lock;	/* lock for wb_keys */
 	spinlock_t		lock;		/* waitqueue/flags lock */
 	unsigned long		flags;
@@ -640,19 +674,18 @@ struct afs_vnode {
 	struct list_head	granted_locks;	/* locks granted on this file */
 	struct delayed_work	lock_work;	/* work to be done in locking */
 	struct key		*lock_key;	/* Key to be used in lock ops */
+	ktime_t			locked_at;	/* Time at which lock obtained */
 	enum afs_lock_state	lock_state : 8;
 	afs_lock_type_t		lock_type : 8;
 
 	/* outstanding callback notification on this file */
-	struct afs_cb_interest	*cb_interest;	/* Server on which this resides */
+	struct afs_cb_interest __rcu *cb_interest; /* Server on which this resides */
 	unsigned int		cb_s_break;	/* Mass break counter on ->server */
 	unsigned int		cb_v_break;	/* Mass break counter on ->volume */
 	unsigned int		cb_break;	/* Break counter on vnode */
 	seqlock_t		cb_lock;	/* Lock for ->cb_interest, ->status, ->cb_*break */
 
 	time64_t		cb_expires_at;	/* time at which callback expires */
-	unsigned		cb_version;	/* callback version */
-	afs_callback_type_t	cb_type;	/* type of callback */
 };
 
 static inline struct fscache_cookie *afs_vnode_cache(struct afs_vnode *vnode)
@@ -687,15 +720,6 @@ struct afs_permits {
 };
 
 /*
- * record of one of a system's set of network interfaces
- */
-struct afs_interface {
-	struct in_addr	address;	/* IPv4 address bound to interface */
-	struct in_addr	netmask;	/* netmask applied to address */
-	unsigned	mtu;		/* MTU of interface */
-};
-
-/*
  * Error prioritisation and accumulation.
  */
 struct afs_error {
@@ -739,6 +763,7 @@ struct afs_vl_cursor {
  * Cursor for iterating over a set of fileservers.
  */
 struct afs_fs_cursor {
+	const struct afs_call_type *type;	/* Type of call done */
 	struct afs_addr_cursor	ac;
 	struct afs_vnode	*vnode;
 	struct afs_server_list	*server_list;	/* Current server list (pins ref) */
@@ -756,6 +781,7 @@ struct afs_fs_cursor {
 #define AFS_FS_CURSOR_VNOVOL	0x0008		/* Set if seen VNOVOL */
 #define AFS_FS_CURSOR_CUR_ONLY	0x0010		/* Set if current server only (file lock held) */
 #define AFS_FS_CURSOR_NO_VSLEEP	0x0020		/* Set to prevent sleep on VBUSY, VOFFLINE, ... */
+#define AFS_FS_CURSOR_INTR	0x0040		/* Set if op is interruptible */
 	unsigned short		nr_iterations;	/* Number of server iterations */
 };
 
@@ -810,9 +836,9 @@ extern struct fscache_cookie_def afs_vnode_cache_index_def;
  * callback.c
  */
 extern void afs_init_callback_state(struct afs_server *);
-extern void __afs_break_callback(struct afs_vnode *);
-extern void afs_break_callback(struct afs_vnode *);
-extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break*);
+extern void __afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
+extern void afs_break_callback(struct afs_vnode *, enum afs_cb_break_reason);
+extern void afs_break_callbacks(struct afs_server *, size_t, struct afs_callback_break *);
 
 extern int afs_register_server_cb_interest(struct afs_vnode *,
 					   struct afs_server_list *, unsigned int);
@@ -828,7 +854,7 @@ static inline struct afs_cb_interest *afs_get_cb_interest(struct afs_cb_interest
 
 static inline unsigned int afs_calc_vnode_cb_break(struct afs_vnode *vnode)
 {
-	return vnode->cb_break + vnode->cb_s_break + vnode->cb_v_break;
+	return vnode->cb_break + vnode->cb_v_break;
 }
 
 static inline bool afs_cb_is_broken(unsigned int cb_break,
@@ -836,7 +862,6 @@ static inline bool afs_cb_is_broken(unsigned int cb_break,
 				    const struct afs_cb_interest *cbi)
 {
 	return !cbi || cb_break != (vnode->cb_break +
-				    cbi->server->cb_s_break +
 				    vnode->volume->cb_v_break);
 }
 
@@ -876,6 +901,13 @@ extern void afs_edit_dir_add(struct afs_vnode *, struct qstr *, struct afs_fid *
 extern void afs_edit_dir_remove(struct afs_vnode *, struct qstr *, enum afs_edit_dir_reason);
 
 /*
+ * dir_silly.c
+ */
+extern int afs_sillyrename(struct afs_vnode *, struct afs_vnode *,
+			   struct dentry *, struct key *);
+extern int afs_silly_iput(struct dentry *, struct inode *);
+
+/*
  * dynroot.c
  */
 extern const struct file_operations afs_dynroot_file_operations;
@@ -908,6 +940,7 @@ extern void afs_put_read(struct afs_read *);
  */
 extern struct workqueue_struct *afs_lock_manager;
 
+extern void afs_lock_op_done(struct afs_call *);
 extern void afs_lock_work(struct work_struct *);
 extern void afs_lock_may_be_available(struct afs_vnode *);
 extern int afs_lock(struct file *, int, struct file_lock *);
@@ -916,41 +949,48 @@ extern int afs_flock(struct file *, int, struct file_lock *);
 /*
  * fsclient.c
  */
-#define AFS_VNODE_NOT_YET_SET	0x01
-#define AFS_VNODE_META_CHANGED	0x02
-#define AFS_VNODE_DATA_CHANGED	0x04
-extern void afs_update_inode_from_status(struct afs_vnode *, struct afs_file_status *,
-					 const afs_dataversion_t *, u8);
-
-extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
+extern int afs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_status_cb *,
+				    struct afs_volsync *);
 extern int afs_fs_give_up_callbacks(struct afs_net *, struct afs_server *);
-extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
-extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t, u64,
-			 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
-extern int afs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, u64);
-extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
-extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64,
-			  struct afs_fid *, struct afs_file_status *);
+extern int afs_fs_fetch_data(struct afs_fs_cursor *, struct afs_status_cb *, struct afs_read *);
+extern int afs_fs_create(struct afs_fs_cursor *, const char *, umode_t,
+			 struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *);
+extern int afs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool,
+			 struct afs_status_cb *);
+extern int afs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *,
+		       struct afs_status_cb *, struct afs_status_cb *);
+extern int afs_fs_symlink(struct afs_fs_cursor *, const char *, const char *,
+			  struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *);
 extern int afs_fs_rename(struct afs_fs_cursor *, const char *,
-			 struct afs_vnode *, const char *, u64, u64);
+			 struct afs_vnode *, const char *,
+			 struct afs_status_cb *, struct afs_status_cb *);
 extern int afs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
-			     pgoff_t, pgoff_t, unsigned, unsigned);
-extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *);
+			     pgoff_t, pgoff_t, unsigned, unsigned, struct afs_status_cb *);
+extern int afs_fs_setattr(struct afs_fs_cursor *, struct iattr *, struct afs_status_cb *);
 extern int afs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
-extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t);
-extern int afs_fs_extend_lock(struct afs_fs_cursor *);
-extern int afs_fs_release_lock(struct afs_fs_cursor *);
+extern int afs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t, struct afs_status_cb *);
+extern int afs_fs_extend_lock(struct afs_fs_cursor *, struct afs_status_cb *);
+extern int afs_fs_release_lock(struct afs_fs_cursor *, struct afs_status_cb *);
 extern int afs_fs_give_up_all_callbacks(struct afs_net *, struct afs_server *,
 					struct afs_addr_cursor *, struct key *);
-extern int afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
-				   struct afs_addr_cursor *, struct key *, unsigned int, bool);
+extern struct afs_call *afs_fs_get_capabilities(struct afs_net *, struct afs_server *,
+						struct afs_addr_cursor *, struct key *,
+						unsigned int);
 extern int afs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
-				     struct afs_fid *, struct afs_file_status *,
-				     struct afs_callback *, unsigned int,
-				     struct afs_volsync *);
+				     struct afs_fid *, struct afs_status_cb *,
+				     unsigned int, struct afs_volsync *);
 extern int afs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
-			       struct afs_fid *, struct afs_file_status *,
-			       struct afs_callback *, struct afs_volsync *);
+			       struct afs_fid *, struct afs_status_cb *,
+			       struct afs_volsync *);
+
+struct afs_acl {
+	u32	size;
+	u8	data[];
+};
+
+extern struct afs_acl *afs_fs_fetch_acl(struct afs_fs_cursor *, struct afs_status_cb *);
+extern int afs_fs_store_acl(struct afs_fs_cursor *, const struct afs_acl *,
+			    struct afs_status_cb *);
 
 /*
  * fs_probe.c
@@ -962,14 +1002,20 @@ extern int afs_wait_for_fs_probes(struct afs_server_list *, unsigned long);
 /*
  * inode.c
  */
-extern int afs_fetch_status(struct afs_vnode *, struct key *, bool);
+extern void afs_vnode_commit_status(struct afs_fs_cursor *,
+				    struct afs_vnode *,
+				    unsigned int,
+				    const afs_dataversion_t *,
+				    struct afs_status_cb *);
+extern int afs_fetch_status(struct afs_vnode *, struct key *, bool, afs_access_t *);
 extern int afs_iget5_test(struct inode *, void *);
 extern struct inode *afs_iget_pseudo_dir(struct super_block *, bool);
 extern struct inode *afs_iget(struct super_block *, struct key *,
-			      struct afs_fid *, struct afs_file_status *,
-			      struct afs_callback *,
-			      struct afs_cb_interest *);
+			      struct afs_iget_data *, struct afs_status_cb *,
+			      struct afs_cb_interest *,
+			      struct afs_vnode *);
 extern void afs_zap_data(struct afs_vnode *);
+extern bool afs_check_validity(struct afs_vnode *);
 extern int afs_validate(struct afs_vnode *, struct key *);
 extern int afs_getattr(const struct path *, struct kstat *, u32, unsigned int);
 extern int afs_setattr(struct dentry *, struct iattr *);
@@ -1036,12 +1082,6 @@ extern struct vfsmount *afs_d_automount(struct path *);
 extern void afs_mntpt_kill_timer(void);
 
 /*
- * netdevices.c
- */
-extern int afs_get_ipv4_interfaces(struct afs_net *, struct afs_interface *,
-				   size_t, bool);
-
-/*
  * proc.c
  */
 #ifdef CONFIG_PROC_FS
@@ -1062,7 +1102,7 @@ static inline void afs_put_sysnames(struct afs_sysnames *sysnames) {}
  * rotate.c
  */
 extern bool afs_begin_vnode_operation(struct afs_fs_cursor *, struct afs_vnode *,
-				      struct key *);
+				      struct key *, bool);
 extern bool afs_select_fileserver(struct afs_fs_cursor *);
 extern bool afs_select_current_fileserver(struct afs_fs_cursor *);
 extern int afs_end_vnode_operation(struct afs_fs_cursor *);
@@ -1076,7 +1116,8 @@ extern int __net_init afs_open_socket(struct afs_net *);
 extern void __net_exit afs_close_socket(struct afs_net *);
 extern void afs_charge_preallocation(struct work_struct *);
 extern void afs_put_call(struct afs_call *);
-extern long afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t, bool);
+extern void afs_make_call(struct afs_addr_cursor *, struct afs_call *, gfp_t);
+extern long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
 extern struct afs_call *afs_alloc_flat_call(struct afs_net *,
 					    const struct afs_call_type *,
 					    size_t, size_t);
@@ -1086,6 +1127,12 @@ extern void afs_send_simple_reply(struct afs_call *, const void *, size_t);
 extern int afs_extract_data(struct afs_call *, bool);
 extern int afs_protocol_error(struct afs_call *, int, enum afs_eproto_cause);
 
+static inline void afs_set_fc_call(struct afs_call *call, struct afs_fs_cursor *fc)
+{
+	call->intr = fc->flags & AFS_FS_CURSOR_INTR;
+	fc->type = call->type;
+}
+
 static inline void afs_extract_begin(struct afs_call *call, void *buf, size_t size)
 {
 	call->kvec[0].iov_base = buf;
@@ -1166,7 +1213,8 @@ static inline void afs_set_call_complete(struct afs_call *call,
  */
 extern void afs_put_permits(struct afs_permits *);
 extern void afs_clear_permits(struct afs_vnode *);
-extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int);
+extern void afs_cache_permit(struct afs_vnode *, struct key *, unsigned int,
+			     struct afs_status_cb *);
 extern void afs_zap_permits(struct rcu_head *);
 extern struct key *afs_request_key(struct afs_cell *);
 extern int afs_check_permit(struct afs_vnode *, struct key *, afs_access_t *);
@@ -1178,17 +1226,12 @@ extern void __exit afs_clean_up_permit_cache(void);
  */
 extern spinlock_t afs_server_peer_lock;
 
-static inline struct afs_server *afs_get_server(struct afs_server *server)
-{
-	atomic_inc(&server->usage);
-	return server;
-}
-
 extern struct afs_server *afs_find_server(struct afs_net *,
 					  const struct sockaddr_rxrpc *);
 extern struct afs_server *afs_find_server_by_uuid(struct afs_net *, const uuid_t *);
 extern struct afs_server *afs_lookup_server(struct afs_cell *, struct key *, const uuid_t *);
-extern void afs_put_server(struct afs_net *, struct afs_server *);
+extern struct afs_server *afs_get_server(struct afs_server *, enum afs_server_trace);
+extern void afs_put_server(struct afs_net *, struct afs_server *, enum afs_server_trace);
 extern void afs_manage_servers(struct work_struct *);
 extern void afs_servers_timer(struct timer_list *);
 extern void __net_exit afs_purge_servers(struct afs_net *);
@@ -1221,8 +1264,8 @@ extern void afs_fs_exit(void);
 extern struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *,
 							 const char *, int);
 extern struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *, const uuid_t *);
-extern int afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *, struct key *,
-				   struct afs_vlserver *, unsigned int, bool);
+extern struct afs_call *afs_vl_get_capabilities(struct afs_net *, struct afs_addr_cursor *,
+						struct key *, struct afs_vlserver *, unsigned int);
 extern struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *, const uuid_t *);
 
 /*
@@ -1274,7 +1317,7 @@ static inline struct afs_volume *__afs_get_volume(struct afs_volume *volume)
 	return volume;
 }
 
-extern struct afs_volume *afs_create_volume(struct afs_mount_params *);
+extern struct afs_volume *afs_create_volume(struct afs_fs_context *);
 extern void afs_activate_volume(struct afs_volume *);
 extern void afs_deactivate_volume(struct afs_volume *);
 extern void afs_put_volume(struct afs_cell *, struct afs_volume *);
@@ -1292,7 +1335,6 @@ extern int afs_write_end(struct file *file, struct address_space *mapping,
 			struct page *page, void *fsdata);
 extern int afs_writepage(struct page *, struct writeback_control *);
 extern int afs_writepages(struct address_space *, struct writeback_control *);
-extern void afs_pages_written_back(struct afs_vnode *, struct afs_call *);
 extern ssize_t afs_file_write(struct kiocb *, struct iov_iter *);
 extern int afs_fsync(struct file *, loff_t, loff_t, int);
 extern vm_fault_t afs_page_mkwrite(struct vm_fault *vmf);
@@ -1308,33 +1350,52 @@ extern ssize_t afs_listxattr(struct dentry *, char *, size_t);
 /*
  * yfsclient.c
  */
-extern int yfs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_volsync *, bool);
-extern int yfs_fs_fetch_data(struct afs_fs_cursor *, struct afs_read *);
-extern int yfs_fs_create_file(struct afs_fs_cursor *, const char *, umode_t, u64,
-			      struct afs_fid *, struct afs_file_status *, struct afs_callback *);
-extern int yfs_fs_make_dir(struct afs_fs_cursor *, const char *, umode_t, u64,
-			 struct afs_fid *, struct afs_file_status *, struct afs_callback *);
-extern int yfs_fs_remove_file2(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
-extern int yfs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool, u64);
-extern int yfs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *, u64);
-extern int yfs_fs_symlink(struct afs_fs_cursor *, const char *, const char *, u64,
-			  struct afs_fid *, struct afs_file_status *);
-extern int yfs_fs_rename(struct afs_fs_cursor *, const char *,
-			 struct afs_vnode *, const char *, u64, u64);
+extern int yfs_fs_fetch_file_status(struct afs_fs_cursor *, struct afs_status_cb *,
+				    struct afs_volsync *);
+extern int yfs_fs_fetch_data(struct afs_fs_cursor *, struct afs_status_cb *, struct afs_read *);
+extern int yfs_fs_create_file(struct afs_fs_cursor *, const char *, umode_t, struct afs_status_cb *,
+			      struct afs_fid *, struct afs_status_cb *);
+extern int yfs_fs_make_dir(struct afs_fs_cursor *, const char *, umode_t, struct afs_status_cb *,
+			   struct afs_fid *, struct afs_status_cb *);
+extern int yfs_fs_remove_file2(struct afs_fs_cursor *, struct afs_vnode *, const char *,
+			       struct afs_status_cb *, struct afs_status_cb *);
+extern int yfs_fs_remove(struct afs_fs_cursor *, struct afs_vnode *, const char *, bool,
+			 struct afs_status_cb *);
+extern int yfs_fs_link(struct afs_fs_cursor *, struct afs_vnode *, const char *,
+		       struct afs_status_cb *, struct afs_status_cb *);
+extern int yfs_fs_symlink(struct afs_fs_cursor *, const char *, const char *,
+			  struct afs_status_cb *, struct afs_fid *, struct afs_status_cb *);
+extern int yfs_fs_rename(struct afs_fs_cursor *, const char *, struct afs_vnode *, const char *,
+			 struct afs_status_cb *, struct afs_status_cb *);
 extern int yfs_fs_store_data(struct afs_fs_cursor *, struct address_space *,
-			     pgoff_t, pgoff_t, unsigned, unsigned);
-extern int yfs_fs_setattr(struct afs_fs_cursor *, struct iattr *);
+			     pgoff_t, pgoff_t, unsigned, unsigned, struct afs_status_cb *);
+extern int yfs_fs_setattr(struct afs_fs_cursor *, struct iattr *, struct afs_status_cb *);
 extern int yfs_fs_get_volume_status(struct afs_fs_cursor *, struct afs_volume_status *);
-extern int yfs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t);
-extern int yfs_fs_extend_lock(struct afs_fs_cursor *);
-extern int yfs_fs_release_lock(struct afs_fs_cursor *);
+extern int yfs_fs_set_lock(struct afs_fs_cursor *, afs_lock_type_t, struct afs_status_cb *);
+extern int yfs_fs_extend_lock(struct afs_fs_cursor *, struct afs_status_cb *);
+extern int yfs_fs_release_lock(struct afs_fs_cursor *, struct afs_status_cb *);
 extern int yfs_fs_fetch_status(struct afs_fs_cursor *, struct afs_net *,
-			       struct afs_fid *, struct afs_file_status *,
-			       struct afs_callback *, struct afs_volsync *);
+			       struct afs_fid *, struct afs_status_cb *,
+			       struct afs_volsync *);
 extern int yfs_fs_inline_bulk_status(struct afs_fs_cursor *, struct afs_net *,
-				     struct afs_fid *, struct afs_file_status *,
-				     struct afs_callback *, unsigned int,
-				     struct afs_volsync *);
+				     struct afs_fid *, struct afs_status_cb *,
+				     unsigned int, struct afs_volsync *);
+
+struct yfs_acl {
+	struct afs_acl	*acl;		/* Dir/file/symlink ACL */
+	struct afs_acl	*vol_acl;	/* Whole volume ACL */
+	u32		inherit_flag;	/* True if ACL is inherited from parent dir */
+	u32		num_cleaned;	/* Number of ACEs removed due to subject removal */
+	unsigned int	flags;
+#define YFS_ACL_WANT_ACL	0x01	/* Set if caller wants ->acl */
+#define YFS_ACL_WANT_VOL_ACL	0x02	/* Set if caller wants ->vol_acl */
+};
+
+extern void yfs_free_opaque_acl(struct yfs_acl *);
+extern struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *, struct yfs_acl *,
+					       struct afs_status_cb *);
+extern int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *, const struct afs_acl *,
+				    struct afs_status_cb *);
 
 /*
  * Miscellaneous inline functions.
@@ -1349,20 +1410,12 @@ static inline struct inode *AFS_VNODE_TO_I(struct afs_vnode *vnode)
 	return &vnode->vfs_inode;
 }
 
-static inline void afs_vnode_commit_status(struct afs_fs_cursor *fc,
-					   struct afs_vnode *vnode,
-					   unsigned int cb_break)
-{
-	if (fc->ac.error == 0)
-		afs_cache_permit(vnode, fc->key, cb_break);
-}
-
 static inline void afs_check_for_remote_deletion(struct afs_fs_cursor *fc,
 						 struct afs_vnode *vnode)
 {
 	if (fc->ac.error == -ENOENT) {
 		set_bit(AFS_VNODE_DELETED, &vnode->flags);
-		afs_break_callback(vnode);
+		afs_break_callback(vnode, afs_cb_break_for_deleted);
 	}
 }
 
diff --git a/fs/afs/main.c b/fs/afs/main.c
index 107427688edd..c9c45d7078bd 100644
--- a/fs/afs/main.c
+++ b/fs/afs/main.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS client file system
  *
  * Copyright (C) 2002,5 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/fs/afs/misc.c b/fs/afs/misc.c
index bbb1fd51b019..52b19e9c1535 100644
--- a/fs/afs/misc.c
+++ b/fs/afs/misc.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* miscellaneous bits
  *
  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -14,6 +10,7 @@
 #include <linux/errno.h>
 #include "internal.h"
 #include "afs_fs.h"
+#include "protocol_uae.h"
 
 /*
  * convert an AFS abort code to a Linux error number
@@ -69,34 +66,25 @@ int afs_abort_to_error(u32 abort_code)
 	case AFSVL_PERM:		return -EACCES;
 	case AFSVL_NOMEM:		return -EREMOTEIO;
 
-		/* Unified AFS error table; ET "uae" == 0x2f6df00 */
-	case 0x2f6df00:		return -EPERM;
-	case 0x2f6df01:		return -ENOENT;
-	case 0x2f6df04:		return -EIO;
-	case 0x2f6df0a:		return -EAGAIN;
-	case 0x2f6df0b:		return -ENOMEM;
-	case 0x2f6df0c:		return -EACCES;
-	case 0x2f6df0f:		return -EBUSY;
-	case 0x2f6df10:		return -EEXIST;
-	case 0x2f6df11:		return -EXDEV;
-	case 0x2f6df12:		return -ENODEV;
-	case 0x2f6df13:		return -ENOTDIR;
-	case 0x2f6df14:		return -EISDIR;
-	case 0x2f6df15:		return -EINVAL;
-	case 0x2f6df1a:		return -EFBIG;
-	case 0x2f6df1b:		return -ENOSPC;
-	case 0x2f6df1d:		return -EROFS;
-	case 0x2f6df1e:		return -EMLINK;
-	case 0x2f6df20:		return -EDOM;
-	case 0x2f6df21:		return -ERANGE;
-	case 0x2f6df22:		return -EDEADLK;
-	case 0x2f6df23:		return -ENAMETOOLONG;
-	case 0x2f6df24:		return -ENOLCK;
-	case 0x2f6df26:		return -ENOTEMPTY;
-	case 0x2f6df28:		return -EWOULDBLOCK;
-	case 0x2f6df69:		return -ENOTCONN;
-	case 0x2f6df6c:		return -ETIMEDOUT;
-	case 0x2f6df78:		return -EDQUOT;
+		/* Unified AFS error table */
+	case UAEPERM:			return -EPERM;
+	case UAENOENT:			return -ENOENT;
+	case UAEACCES:			return -EACCES;
+	case UAEBUSY:			return -EBUSY;
+	case UAEEXIST:			return -EEXIST;
+	case UAENOTDIR:			return -ENOTDIR;
+	case UAEISDIR:			return -EISDIR;
+	case UAEFBIG:			return -EFBIG;
+	case UAENOSPC:			return -ENOSPC;
+	case UAEROFS:			return -EROFS;
+	case UAEMLINK:			return -EMLINK;
+	case UAEDEADLK:			return -EDEADLK;
+	case UAENAMETOOLONG:		return -ENAMETOOLONG;
+	case UAENOLCK:			return -ENOLCK;
+	case UAENOTEMPTY:		return -ENOTEMPTY;
+	case UAELOOP:			return -ELOOP;
+	case UAENOMEDIUM:		return -ENOMEDIUM;
+	case UAEDQUOT:			return -EDQUOT;
 
 		/* RXKAD abort codes; from include/rxrpc/packet.h.  ET "RXK" == 0x1260B00 */
 	case RXKADINCONSISTENCY: return -EPROTO;
@@ -131,33 +119,42 @@ void afs_prioritise_error(struct afs_error *e, int error, u32 abort_code)
 		if (e->error == -ETIMEDOUT ||
 		    e->error == -ETIME)
 			return;
+		/* Fall through */
 	case -ETIMEDOUT:
 	case -ETIME:
 		if (e->error == -ENOMEM ||
 		    e->error == -ENONET)
 			return;
+		/* Fall through */
 	case -ENOMEM:
 	case -ENONET:
 		if (e->error == -ERFKILL)
 			return;
+		/* Fall through */
 	case -ERFKILL:
 		if (e->error == -EADDRNOTAVAIL)
 			return;
+		/* Fall through */
 	case -EADDRNOTAVAIL:
 		if (e->error == -ENETUNREACH)
 			return;
+		/* Fall through */
 	case -ENETUNREACH:
 		if (e->error == -EHOSTUNREACH)
 			return;
+		/* Fall through */
 	case -EHOSTUNREACH:
 		if (e->error == -EHOSTDOWN)
 			return;
+		/* Fall through */
 	case -EHOSTDOWN:
 		if (e->error == -ECONNREFUSED)
 			return;
+		/* Fall through */
 	case -ECONNREFUSED:
 		if (e->error == -ECONNRESET)
 			return;
+		/* Fall through */
 	case -ECONNRESET: /* Responded, but call expired. */
 		if (e->responded)
 			return;
diff --git a/fs/afs/mntpt.c b/fs/afs/mntpt.c
index 2e51c6994148..f532d6d3bd28 100644
--- a/fs/afs/mntpt.c
+++ b/fs/afs/mntpt.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* mountpoint management
  *
  * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -17,6 +13,7 @@
 #include <linux/mount.h>
 #include <linux/namei.h>
 #include <linux/gfp.h>
+#include <linux/fs_context.h>
 #include "internal.h"
 
 
@@ -47,6 +44,8 @@ static DECLARE_DELAYED_WORK(afs_mntpt_expiry_timer, afs_mntpt_expiry_timed_out);
 
 static unsigned long afs_mntpt_expiry_timeout = 10 * 60;
 
+static const char afs_root_volume[] = "root.cell";
+
 /*
  * no valid lookup procedure on this sort of dir
  */
@@ -68,108 +67,112 @@ static int afs_mntpt_open(struct inode *inode, struct file *file)
 }
 
 /*
- * create a vfsmount to be automounted
+ * Set the parameters for the proposed superblock.
  */
-static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt)
+static int afs_mntpt_set_params(struct fs_context *fc, struct dentry *mntpt)
 {
-	struct afs_super_info *as;
-	struct vfsmount *mnt;
-	struct afs_vnode *vnode;
-	struct page *page;
-	char *devname, *options;
-	bool rwpath = false;
+	struct afs_fs_context *ctx = fc->fs_private;
+	struct afs_super_info *src_as = AFS_FS_S(mntpt->d_sb);
+	struct afs_vnode *vnode = AFS_FS_I(d_inode(mntpt));
+	struct afs_cell *cell;
+	const char *p;
 	int ret;
 
-	_enter("{%pd}", mntpt);
-
-	BUG_ON(!d_inode(mntpt));
-
-	ret = -ENOMEM;
-	devname = (char *) get_zeroed_page(GFP_KERNEL);
-	if (!devname)
-		goto error_no_devname;
-
-	options = (char *) get_zeroed_page(GFP_KERNEL);
-	if (!options)
-		goto error_no_options;
+	if (fc->net_ns != src_as->net_ns) {
+		put_net(fc->net_ns);
+		fc->net_ns = get_net(src_as->net_ns);
+	}
 
-	vnode = AFS_FS_I(d_inode(mntpt));
+	if (src_as->volume && src_as->volume->type == AFSVL_RWVOL) {
+		ctx->type = AFSVL_RWVOL;
+		ctx->force = true;
+	}
+	if (ctx->cell) {
+		afs_put_cell(ctx->net, ctx->cell);
+		ctx->cell = NULL;
+	}
 	if (test_bit(AFS_VNODE_PSEUDODIR, &vnode->flags)) {
 		/* if the directory is a pseudo directory, use the d_name */
-		static const char afs_root_cell[] = ":root.cell.";
 		unsigned size = mntpt->d_name.len;
 
-		ret = -ENOENT;
-		if (size < 2 || size > AFS_MAXCELLNAME)
-			goto error_no_page;
+		if (size < 2)
+			return -ENOENT;
 
+		p = mntpt->d_name.name;
 		if (mntpt->d_name.name[0] == '.') {
-			devname[0] = '%';
-			memcpy(devname + 1, mntpt->d_name.name + 1, size - 1);
-			memcpy(devname + size, afs_root_cell,
-			       sizeof(afs_root_cell));
-			rwpath = true;
-		} else {
-			devname[0] = '#';
-			memcpy(devname + 1, mntpt->d_name.name, size);
-			memcpy(devname + size + 1, afs_root_cell,
-			       sizeof(afs_root_cell));
+			size--;
+			p++;
+			ctx->type = AFSVL_RWVOL;
+			ctx->force = true;
 		}
+		if (size > AFS_MAXCELLNAME)
+			return -ENAMETOOLONG;
+
+		cell = afs_lookup_cell(ctx->net, p, size, NULL, false);
+		if (IS_ERR(cell)) {
+			pr_err("kAFS: unable to lookup cell '%pd'\n", mntpt);
+			return PTR_ERR(cell);
+		}
+		ctx->cell = cell;
+
+		ctx->volname = afs_root_volume;
+		ctx->volnamesz = sizeof(afs_root_volume) - 1;
 	} else {
 		/* read the contents of the AFS special symlink */
+		struct page *page;
 		loff_t size = i_size_read(d_inode(mntpt));
 		char *buf;
 
-		ret = -EINVAL;
+		if (src_as->cell)
+			ctx->cell = afs_get_cell(src_as->cell);
+
 		if (size > PAGE_SIZE - 1)
-			goto error_no_page;
+			return -EINVAL;
 
 		page = read_mapping_page(d_inode(mntpt)->i_mapping, 0, NULL);
-		if (IS_ERR(page)) {
-			ret = PTR_ERR(page);
-			goto error_no_page;
-		}
+		if (IS_ERR(page))
+			return PTR_ERR(page);
 
 		if (PageError(page)) {
 			ret = afs_bad(AFS_FS_I(d_inode(mntpt)), afs_file_error_mntpt);
-			goto error;
+			put_page(page);
+			return ret;
 		}
 
-		buf = kmap_atomic(page);
-		memcpy(devname, buf, size);
-		kunmap_atomic(buf);
+		buf = kmap(page);
+		ret = vfs_parse_fs_string(fc, "source", buf, size);
+		kunmap(page);
 		put_page(page);
-		page = NULL;
+		if (ret < 0)
+			return ret;
 	}
 
-	/* work out what options we want */
-	as = AFS_FS_S(mntpt->d_sb);
-	if (as->cell) {
-		memcpy(options, "cell=", 5);
-		strcpy(options + 5, as->cell->name);
-		if ((as->volume && as->volume->type == AFSVL_RWVOL) || rwpath)
-			strcat(options, ",rwpath");
-	}
+	return 0;
+}
 
-	/* try and do the mount */
-	_debug("--- attempting mount %s -o %s ---", devname, options);
-	mnt = vfs_submount(mntpt, &afs_fs_type, devname, options);
-	_debug("--- mount result %p ---", mnt);
+/*
+ * create a vfsmount to be automounted
+ */
+static struct vfsmount *afs_mntpt_do_automount(struct dentry *mntpt)
+{
+	struct fs_context *fc;
+	struct vfsmount *mnt;
+	int ret;
 
-	free_page((unsigned long) devname);
-	free_page((unsigned long) options);
-	_leave(" = %p", mnt);
-	return mnt;
+	BUG_ON(!d_inode(mntpt));
 
-error:
-	put_page(page);
-error_no_page:
-	free_page((unsigned long) options);
-error_no_options:
-	free_page((unsigned long) devname);
-error_no_devname:
-	_leave(" = %d", ret);
-	return ERR_PTR(ret);
+	fc = fs_context_for_submount(&afs_fs_type, mntpt);
+	if (IS_ERR(fc))
+		return ERR_CAST(fc);
+
+	ret = afs_mntpt_set_params(fc, mntpt);
+	if (!ret)
+		mnt = fc_mount(fc);
+	else
+		mnt = ERR_PTR(ret);
+
+	put_fs_context(fc);
+	return mnt;
 }
 
 /*
diff --git a/fs/afs/netdevices.c b/fs/afs/netdevices.c
deleted file mode 100644
index 2a009d1939d7..000000000000
--- a/fs/afs/netdevices.c
+++ /dev/null
@@ -1,48 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/* AFS network device helpers
- *
- * Copyright (c) 2007 Patrick McHardy <kaber@trash.net>
- */
-
-#include <linux/string.h>
-#include <linux/rtnetlink.h>
-#include <linux/inetdevice.h>
-#include <linux/netdevice.h>
-#include <linux/if_arp.h>
-#include <net/net_namespace.h>
-#include "internal.h"
-
-/*
- * get a list of this system's interface IPv4 addresses, netmasks and MTUs
- * - maxbufs must be at least 1
- * - returns the number of interface records in the buffer
- */
-int afs_get_ipv4_interfaces(struct afs_net *net, struct afs_interface *bufs,
-			    size_t maxbufs, bool wantloopback)
-{
-	struct net_device *dev;
-	struct in_device *idev;
-	int n = 0;
-
-	ASSERT(maxbufs > 0);
-
-	rtnl_lock();
-	for_each_netdev(net->net, dev) {
-		if (dev->type == ARPHRD_LOOPBACK && !wantloopback)
-			continue;
-		idev = __in_dev_get_rtnl(dev);
-		if (!idev)
-			continue;
-		for_primary_ifa(idev) {
-			bufs[n].address.s_addr = ifa->ifa_address;
-			bufs[n].netmask.s_addr = ifa->ifa_mask;
-			bufs[n].mtu = dev->mtu;
-			n++;
-			if (n >= maxbufs)
-				goto out;
-		} endfor_ifa(idev);
-	}
-out:
-	rtnl_unlock();
-	return n;
-}
diff --git a/fs/afs/proc.c b/fs/afs/proc.c
index be2ee3bbd0a9..fba2ec3a3a9c 100644
--- a/fs/afs/proc.c
+++ b/fs/afs/proc.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* /proc interface for AFS
  *
  * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/slab.h>
@@ -53,7 +49,7 @@ static int afs_proc_cells_show(struct seq_file *m, void *v)
 	seq_printf(m, "%3u %6lld %2u %s\n",
 		   atomic_read(&cell->usage),
 		   cell->dns_expiry - ktime_get_real_seconds(),
-		   vllist ? vllist->nr_servers : 0,
+		   vllist->nr_servers,
 		   cell->name);
 	return 0;
 }
@@ -296,8 +292,8 @@ static int afs_proc_cell_vlservers_show(struct seq_file *m, void *v)
 
 	if (v == SEQ_START_TOKEN) {
 		seq_printf(m, "# source %s, status %s\n",
-			   dns_record_sources[vllist->source],
-			   dns_lookup_statuses[vllist->status]);
+			   dns_record_sources[vllist ? vllist->source : 0],
+			   dns_lookup_statuses[vllist ? vllist->status : 0]);
 		return 0;
 	}
 
@@ -336,7 +332,7 @@ static void *afs_proc_cell_vlservers_start(struct seq_file *m, loff_t *_pos)
 	if (pos == 0)
 		return SEQ_START_TOKEN;
 
-	if (!vllist || pos - 1 >= vllist->nr_servers)
+	if (pos - 1 >= vllist->nr_servers)
 		return NULL;
 
 	return &vllist->servers[pos - 1];
diff --git a/fs/afs/protocol_uae.h b/fs/afs/protocol_uae.h
new file mode 100644
index 000000000000..1b3d1060bd34
--- /dev/null
+++ b/fs/afs/protocol_uae.h
@@ -0,0 +1,132 @@
+// SPDX-License-Identifier: GPL-2.0
+/* Universal AFS Error codes (UAE).
+ *
+ * Copyright (C) 2003, Daria Phoebe Brashear
+ * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
+ */
+
+enum {
+	UAEPERM			= 0x2f6df00, /* Operation not permitted */
+	UAENOENT		= 0x2f6df01, /* No such file or directory */
+	UAESRCH			= 0x2f6df02, /* No such process */
+	UAEINTR			= 0x2f6df03, /* Interrupted system call */
+	UAEIO			= 0x2f6df04, /* I/O error */
+	UAENXIO			= 0x2f6df05, /* No such device or address */
+	UAE2BIG			= 0x2f6df06, /* Arg list too long */
+	UAENOEXEC		= 0x2f6df07, /* Exec format error */
+	UAEBADF			= 0x2f6df08, /* Bad file number */
+	UAECHILD		= 0x2f6df09, /* No child processes */
+	UAEAGAIN		= 0x2f6df0a, /* Try again */
+	UAENOMEM		= 0x2f6df0b, /* Out of memory */
+	UAEACCES		= 0x2f6df0c, /* Permission denied */
+	UAEFAULT		= 0x2f6df0d, /* Bad address */
+	UAENOTBLK		= 0x2f6df0e, /* Block device required */
+	UAEBUSY			= 0x2f6df0f, /* Device or resource busy */
+	UAEEXIST		= 0x2f6df10, /* File exists */
+	UAEXDEV			= 0x2f6df11, /* Cross-device link */
+	UAENODEV		= 0x2f6df12, /* No such device */
+	UAENOTDIR		= 0x2f6df13, /* Not a directory */
+	UAEISDIR		= 0x2f6df14, /* Is a directory */
+	UAEINVAL		= 0x2f6df15, /* Invalid argument */
+	UAENFILE		= 0x2f6df16, /* File table overflow */
+	UAEMFILE		= 0x2f6df17, /* Too many open files */
+	UAENOTTY		= 0x2f6df18, /* Not a typewriter */
+	UAETXTBSY		= 0x2f6df19, /* Text file busy */
+	UAEFBIG			= 0x2f6df1a, /* File too large */
+	UAENOSPC		= 0x2f6df1b, /* No space left on device */
+	UAESPIPE		= 0x2f6df1c, /* Illegal seek */
+	UAEROFS			= 0x2f6df1d, /* Read-only file system */
+	UAEMLINK		= 0x2f6df1e, /* Too many links */
+	UAEPIPE			= 0x2f6df1f, /* Broken pipe */
+	UAEDOM			= 0x2f6df20, /* Math argument out of domain of func */
+	UAERANGE		= 0x2f6df21, /* Math result not representable */
+	UAEDEADLK		= 0x2f6df22, /* Resource deadlock would occur */
+	UAENAMETOOLONG		= 0x2f6df23, /* File name too long */
+	UAENOLCK		= 0x2f6df24, /* No record locks available */
+	UAENOSYS		= 0x2f6df25, /* Function not implemented */
+	UAENOTEMPTY		= 0x2f6df26, /* Directory not empty */
+	UAELOOP			= 0x2f6df27, /* Too many symbolic links encountered */
+	UAEWOULDBLOCK		= 0x2f6df28, /* Operation would block */
+	UAENOMSG		= 0x2f6df29, /* No message of desired type */
+	UAEIDRM			= 0x2f6df2a, /* Identifier removed */
+	UAECHRNG		= 0x2f6df2b, /* Channel number out of range */
+	UAEL2NSYNC		= 0x2f6df2c, /* Level 2 not synchronized */
+	UAEL3HLT		= 0x2f6df2d, /* Level 3 halted */
+	UAEL3RST		= 0x2f6df2e, /* Level 3 reset */
+	UAELNRNG		= 0x2f6df2f, /* Link number out of range */
+	UAEUNATCH		= 0x2f6df30, /* Protocol driver not attached */
+	UAENOCSI		= 0x2f6df31, /* No CSI structure available */
+	UAEL2HLT		= 0x2f6df32, /* Level 2 halted */
+	UAEBADE			= 0x2f6df33, /* Invalid exchange */
+	UAEBADR			= 0x2f6df34, /* Invalid request descriptor */
+	UAEXFULL		= 0x2f6df35, /* Exchange full */
+	UAENOANO		= 0x2f6df36, /* No anode */
+	UAEBADRQC		= 0x2f6df37, /* Invalid request code */
+	UAEBADSLT		= 0x2f6df38, /* Invalid slot */
+	UAEBFONT		= 0x2f6df39, /* Bad font file format */
+	UAENOSTR		= 0x2f6df3a, /* Device not a stream */
+	UAENODATA		= 0x2f6df3b, /* No data available */
+	UAETIME			= 0x2f6df3c, /* Timer expired */
+	UAENOSR			= 0x2f6df3d, /* Out of streams resources */
+	UAENONET		= 0x2f6df3e, /* Machine is not on the network */
+	UAENOPKG		= 0x2f6df3f, /* Package not installed */
+	UAEREMOTE		= 0x2f6df40, /* Object is remote */
+	UAENOLINK		= 0x2f6df41, /* Link has been severed */
+	UAEADV			= 0x2f6df42, /* Advertise error */
+	UAESRMNT		= 0x2f6df43, /* Srmount error */
+	UAECOMM			= 0x2f6df44, /* Communication error on send */
+	UAEPROTO		= 0x2f6df45, /* Protocol error */
+	UAEMULTIHOP		= 0x2f6df46, /* Multihop attempted */
+	UAEDOTDOT		= 0x2f6df47, /* RFS specific error */
+	UAEBADMSG		= 0x2f6df48, /* Not a data message */
+	UAEOVERFLOW		= 0x2f6df49, /* Value too large for defined data type */
+	UAENOTUNIQ		= 0x2f6df4a, /* Name not unique on network */
+	UAEBADFD		= 0x2f6df4b, /* File descriptor in bad state */
+	UAEREMCHG		= 0x2f6df4c, /* Remote address changed */
+	UAELIBACC		= 0x2f6df4d, /* Can not access a needed shared library */
+	UAELIBBAD		= 0x2f6df4e, /* Accessing a corrupted shared library */
+	UAELIBSCN		= 0x2f6df4f, /* .lib section in a.out corrupted */
+	UAELIBMAX		= 0x2f6df50, /* Attempting to link in too many shared libraries */
+	UAELIBEXEC		= 0x2f6df51, /* Cannot exec a shared library directly */
+	UAEILSEQ		= 0x2f6df52, /* Illegal byte sequence */
+	UAERESTART		= 0x2f6df53, /* Interrupted system call should be restarted */
+	UAESTRPIPE		= 0x2f6df54, /* Streams pipe error */
+	UAEUSERS		= 0x2f6df55, /* Too many users */
+	UAENOTSOCK		= 0x2f6df56, /* Socket operation on non-socket */
+	UAEDESTADDRREQ		= 0x2f6df57, /* Destination address required */
+	UAEMSGSIZE		= 0x2f6df58, /* Message too long */
+	UAEPROTOTYPE		= 0x2f6df59, /* Protocol wrong type for socket */
+	UAENOPROTOOPT		= 0x2f6df5a, /* Protocol not available */
+	UAEPROTONOSUPPORT	= 0x2f6df5b, /* Protocol not supported */
+	UAESOCKTNOSUPPORT	= 0x2f6df5c, /* Socket type not supported */
+	UAEOPNOTSUPP		= 0x2f6df5d, /* Operation not supported on transport endpoint */
+	UAEPFNOSUPPORT		= 0x2f6df5e, /* Protocol family not supported */
+	UAEAFNOSUPPORT		= 0x2f6df5f, /* Address family not supported by protocol */
+	UAEADDRINUSE		= 0x2f6df60, /* Address already in use */
+	UAEADDRNOTAVAIL		= 0x2f6df61, /* Cannot assign requested address */
+	UAENETDOWN		= 0x2f6df62, /* Network is down */
+	UAENETUNREACH		= 0x2f6df63, /* Network is unreachable */
+	UAENETRESET		= 0x2f6df64, /* Network dropped connection because of reset */
+	UAECONNABORTED		= 0x2f6df65, /* Software caused connection abort */
+	UAECONNRESET		= 0x2f6df66, /* Connection reset by peer */
+	UAENOBUFS		= 0x2f6df67, /* No buffer space available */
+	UAEISCONN		= 0x2f6df68, /* Transport endpoint is already connected */
+	UAENOTCONN		= 0x2f6df69, /* Transport endpoint is not connected */
+	UAESHUTDOWN		= 0x2f6df6a, /* Cannot send after transport endpoint shutdown */
+	UAETOOMANYREFS		= 0x2f6df6b, /* Too many references: cannot splice */
+	UAETIMEDOUT		= 0x2f6df6c, /* Connection timed out */
+	UAECONNREFUSED		= 0x2f6df6d, /* Connection refused */
+	UAEHOSTDOWN		= 0x2f6df6e, /* Host is down */
+	UAEHOSTUNREACH		= 0x2f6df6f, /* No route to host */
+	UAEALREADY		= 0x2f6df70, /* Operation already in progress */
+	UAEINPROGRESS		= 0x2f6df71, /* Operation now in progress */
+	UAESTALE		= 0x2f6df72, /* Stale NFS file handle */
+	UAEUCLEAN		= 0x2f6df73, /* Structure needs cleaning */
+	UAENOTNAM		= 0x2f6df74, /* Not a XENIX named type file */
+	UAENAVAIL		= 0x2f6df75, /* No XENIX semaphores available */
+	UAEISNAM		= 0x2f6df76, /* Is a named type file */
+	UAEREMOTEIO		= 0x2f6df77, /* Remote I/O error */
+	UAEDQUOT		= 0x2f6df78, /* Quota exceeded */
+	UAENOMEDIUM		= 0x2f6df79, /* No medium found */
+	UAEMEDIUMTYPE		= 0x2f6df7a, /* Wrong medium type */
+};
diff --git a/fs/afs/protocol_yfs.h b/fs/afs/protocol_yfs.h
index d443e2bfa094..32be9c698348 100644
--- a/fs/afs/protocol_yfs.h
+++ b/fs/afs/protocol_yfs.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* YFS protocol bits
  *
  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #define YFS_FS_SERVICE	2500
@@ -31,9 +27,9 @@ enum YFS_CM_Operations {
 };
 
 enum YFS_FS_Operations {
-	YFSFETCHACL		= 64131, /* YFS Fetch file ACL */
+	YFSFETCHACL		= 64131, /* YFS Fetch file AFS3 ACL */
 	YFSFETCHSTATUS		= 64132, /* YFS Fetch file status */
-	YFSSTOREACL		= 64134, /* YFS Store file ACL */
+	YFSSTOREACL		= 64134, /* YFS Store file AFS3 ACL */
 	YFSSTORESTATUS		= 64135, /* YFS Store file status */
 	YFSREMOVEFILE		= 64136, /* YFS Remove a file */
 	YFSCREATEFILE		= 64137, /* YFS Create a file */
@@ -49,7 +45,7 @@ enum YFS_FS_Operations {
 	YFSRELEASELOCK		= 64158, /* YFS Release a file lock */
 	YFSLOOKUP		= 64161, /* YFS lookup file in directory */
 	YFSFLUSHCPS		= 64165,
-	YFSFETCHOPAQUEACL	= 64168,
+	YFSFETCHOPAQUEACL	= 64168, /* YFS Fetch file YFS ACL */
 	YFSWHOAMI		= 64170,
 	YFSREMOVEACL		= 64171,
 	YFSREMOVEFILE2		= 64173,
diff --git a/fs/afs/rotate.c b/fs/afs/rotate.c
index c3ae324781f8..172ba569cd60 100644
--- a/fs/afs/rotate.c
+++ b/fs/afs/rotate.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Handle fileserver selection and rotation.
  *
  * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -25,7 +21,7 @@
  * them here also using the io_lock.
  */
 bool afs_begin_vnode_operation(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
-			       struct key *key)
+			       struct key *key, bool intr)
 {
 	memset(fc, 0, sizeof(*fc));
 	fc->vnode = vnode;
@@ -33,10 +29,15 @@ bool afs_begin_vnode_operation(struct afs_fs_cursor *fc, struct afs_vnode *vnode
 	fc->ac.error = SHRT_MAX;
 	fc->error = -EDESTADDRREQ;
 
-	if (mutex_lock_interruptible(&vnode->io_lock) < 0) {
-		fc->error = -EINTR;
-		fc->flags |= AFS_FS_CURSOR_STOP;
-		return false;
+	if (intr) {
+		fc->flags |= AFS_FS_CURSOR_INTR;
+		if (mutex_lock_interruptible(&vnode->io_lock) < 0) {
+			fc->error = -EINTR;
+			fc->flags |= AFS_FS_CURSOR_STOP;
+			return false;
+		}
+	} else {
+		mutex_lock(&vnode->io_lock);
 	}
 
 	if (vnode->lock_state != AFS_VNODE_LOCK_NONE)
@@ -61,7 +62,8 @@ static bool afs_start_fs_iteration(struct afs_fs_cursor *fc,
 	fc->untried = (1UL << fc->server_list->nr_servers) - 1;
 	fc->index = READ_ONCE(fc->server_list->preferred);
 
-	cbi = vnode->cb_interest;
+	cbi = rcu_dereference_protected(vnode->cb_interest,
+					lockdep_is_held(&vnode->io_lock));
 	if (cbi) {
 		/* See if the vnode's preferred record is still available */
 		for (i = 0; i < fc->server_list->nr_servers; i++) {
@@ -82,8 +84,8 @@ static bool afs_start_fs_iteration(struct afs_fs_cursor *fc,
 
 		/* Note that the callback promise is effectively broken */
 		write_seqlock(&vnode->cb_lock);
-		ASSERTCMP(cbi, ==, vnode->cb_interest);
-		vnode->cb_interest = NULL;
+		ASSERTCMP(cbi, ==, rcu_access_pointer(vnode->cb_interest));
+		rcu_assign_pointer(vnode->cb_interest, NULL);
 		if (test_and_clear_bit(AFS_VNODE_CB_PROMISED, &vnode->flags))
 			vnode->cb_break++;
 		write_sequnlock(&vnode->cb_lock);
@@ -118,10 +120,14 @@ static void afs_busy(struct afs_volume *volume, u32 abort_code)
  */
 static bool afs_sleep_and_retry(struct afs_fs_cursor *fc)
 {
-	msleep_interruptible(1000);
-	if (signal_pending(current)) {
-		fc->error = -ERESTARTSYS;
-		return false;
+	if (fc->flags & AFS_FS_CURSOR_INTR) {
+		msleep_interruptible(1000);
+		if (signal_pending(current)) {
+			fc->error = -ERESTARTSYS;
+			return false;
+		}
+	} else {
+		msleep(1000);
 	}
 
 	return true;
@@ -408,7 +414,9 @@ selected_server:
 	if (error < 0)
 		goto failed_set_error;
 
-	fc->cbi = afs_get_cb_interest(vnode->cb_interest);
+	fc->cbi = afs_get_cb_interest(
+		rcu_dereference_protected(vnode->cb_interest,
+					  lockdep_is_held(&vnode->io_lock)));
 
 	read_lock(&server->fs_lock);
 	alist = rcu_dereference_protected(server->addresses,
@@ -459,6 +467,8 @@ no_more_servers:
 				     s->probe.abort_code);
 	}
 
+	error = e.error;
+
 failed_set_error:
 	fc->error = error;
 failed:
@@ -476,12 +486,15 @@ failed:
 bool afs_select_current_fileserver(struct afs_fs_cursor *fc)
 {
 	struct afs_vnode *vnode = fc->vnode;
-	struct afs_cb_interest *cbi = vnode->cb_interest;
+	struct afs_cb_interest *cbi;
 	struct afs_addr_list *alist;
 	int error = fc->ac.error;
 
 	_enter("");
 
+	cbi = rcu_dereference_protected(vnode->cb_interest,
+					lockdep_is_held(&vnode->io_lock));
+
 	switch (error) {
 	case SHRT_MAX:
 		if (!cbi) {
@@ -490,7 +503,7 @@ bool afs_select_current_fileserver(struct afs_fs_cursor *fc)
 			return false;
 		}
 
-		fc->cbi = afs_get_cb_interest(vnode->cb_interest);
+		fc->cbi = afs_get_cb_interest(cbi);
 
 		read_lock(&cbi->server->fs_lock);
 		alist = rcu_dereference_protected(cbi->server->addresses,
diff --git a/fs/afs/rxrpc.c b/fs/afs/rxrpc.c
index 2c588f9bbbda..0e5269374ac1 100644
--- a/fs/afs/rxrpc.c
+++ b/fs/afs/rxrpc.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Maintain an RxRPC server socket to do AFS communications through
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/slab.h>
@@ -21,7 +17,6 @@
 struct workqueue_struct *afs_async_calls;
 
 static void afs_wake_up_call_waiter(struct sock *, struct rxrpc_call *, unsigned long);
-static long afs_wait_for_call_to_complete(struct afs_call *, struct afs_addr_cursor *);
 static void afs_wake_up_async_call(struct sock *, struct rxrpc_call *, unsigned long);
 static void afs_delete_async_call(struct work_struct *);
 static void afs_process_async_call(struct work_struct *);
@@ -189,7 +184,7 @@ void afs_put_call(struct afs_call *call)
 		if (call->type->destructor)
 			call->type->destructor(call);
 
-		afs_put_server(call->net, call->cm_server);
+		afs_put_server(call->net, call->server, afs_server_trace_put_call);
 		afs_put_cb_interest(call->net, call->cbi);
 		afs_put_addrlist(call->alist);
 		kfree(call->request);
@@ -361,10 +356,10 @@ static int afs_send_pages(struct afs_call *call, struct msghdr *msg)
 }
 
 /*
- * initiate a call
+ * Initiate a call and synchronously queue up the parameters for dispatch.  Any
+ * error is stored into the call struct, which the caller must check for.
  */
-long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
-		   gfp_t gfp, bool async)
+void afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call, gfp_t gfp)
 {
 	struct sockaddr_rxrpc *srx = &ac->alist->addrs[ac->index];
 	struct rxrpc_call *rxcall;
@@ -382,7 +377,6 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
 	       call, call->type->name, key_serial(call->key),
 	       atomic_read(&call->net->nr_outstanding_calls));
 
-	call->async = async;
 	call->addr_ix = ac->index;
 	call->alist = afs_get_addrlist(ac->alist);
 
@@ -415,10 +409,11 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
 	rxcall = rxrpc_kernel_begin_call(call->net->socket, srx, call->key,
 					 (unsigned long)call,
 					 tx_total_len, gfp,
-					 (async ?
+					 (call->async ?
 					  afs_wake_up_async_call :
 					  afs_wake_up_call_waiter),
 					 call->upgrade,
+					 call->intr,
 					 call->debug_id);
 	if (IS_ERR(rxcall)) {
 		ret = PTR_ERR(rxcall);
@@ -428,6 +423,10 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
 
 	call->rxcall = rxcall;
 
+	if (call->max_lifespan)
+		rxrpc_kernel_set_max_life(call->net->socket, rxcall,
+					  call->max_lifespan);
+
 	/* send the request */
 	iov[0].iov_base	= call->request;
 	iov[0].iov_len	= call->request_size;
@@ -453,13 +452,11 @@ long afs_make_call(struct afs_addr_cursor *ac, struct afs_call *call,
 
 	/* Note that at this point, we may have received the reply or an abort
 	 * - and an asynchronous call may already have completed.
+	 *
+	 * afs_wait_for_call_to_complete(call, ac)
+	 * must be called to synchronously clean up.
 	 */
-	if (call->async) {
-		afs_put_call(call);
-		return -EINPROGRESS;
-	}
-
-	return afs_wait_for_call_to_complete(call, ac);
+	return;
 
 error_do_abort:
 	if (ret != -ECONNABORTED) {
@@ -495,9 +492,7 @@ error_kill_call:
 
 	ac->error = ret;
 	call->state = AFS_CALL_COMPLETE;
-	afs_put_call(call);
 	_leave(" = %d", ret);
-	return ret;
 }
 
 /*
@@ -535,11 +530,11 @@ static void afs_deliver_to_call(struct afs_call *call)
 			return;
 		}
 
-		if (call->want_reply_time &&
+		if (!call->have_reply_time &&
 		    rxrpc_kernel_get_reply_time(call->net->socket,
 						call->rxcall,
 						&call->reply_time))
-			call->want_reply_time = false;
+			call->have_reply_time = true;
 
 		ret = call->type->deliver(call);
 		state = READ_ONCE(call->state);
@@ -572,13 +567,17 @@ static void afs_deliver_to_call(struct afs_call *call)
 		case -ENODATA:
 		case -EBADMSG:
 		case -EMSGSIZE:
-		default:
 			abort_code = RXGEN_CC_UNMARSHAL;
 			if (state != AFS_CALL_CL_AWAIT_REPLY)
 				abort_code = RXGEN_SS_UNMARSHAL;
 			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
 						abort_code, ret, "KUM");
 			goto local_abort;
+		default:
+			abort_code = RX_USER_ABORT;
+			rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
+						abort_code, ret, "KER");
+			goto local_abort;
 		}
 	}
 
@@ -600,28 +599,33 @@ call_complete:
 }
 
 /*
- * wait synchronously for a call to complete
+ * Wait synchronously for a call to complete and clean up the call struct.
  */
-static long afs_wait_for_call_to_complete(struct afs_call *call,
-					  struct afs_addr_cursor *ac)
+long afs_wait_for_call_to_complete(struct afs_call *call,
+				   struct afs_addr_cursor *ac)
 {
 	signed long rtt2, timeout;
 	long ret;
 	bool stalled = false;
 	u64 rtt;
 	u32 life, last_life;
+	bool rxrpc_complete = false;
 
 	DECLARE_WAITQUEUE(myself, current);
 
 	_enter("");
 
+	ret = call->error;
+	if (ret < 0)
+		goto out;
+
 	rtt = rxrpc_kernel_get_rtt(call->net->socket, call->rxcall);
 	rtt2 = nsecs_to_jiffies64(rtt) * 2;
 	if (rtt2 < 2)
 		rtt2 = 2;
 
 	timeout = rtt2;
-	last_life = rxrpc_kernel_check_life(call->net->socket, call->rxcall);
+	rxrpc_kernel_check_life(call->net->socket, call->rxcall, &last_life);
 
 	add_wait_queue(&call->waitq, &myself);
 	for (;;) {
@@ -639,8 +643,13 @@ static long afs_wait_for_call_to_complete(struct afs_call *call,
 		if (afs_check_call_state(call, AFS_CALL_COMPLETE))
 			break;
 
-		life = rxrpc_kernel_check_life(call->net->socket, call->rxcall);
-		if (timeout == 0 &&
+		if (!rxrpc_kernel_check_life(call->net->socket, call->rxcall, &life)) {
+			/* rxrpc terminated the call. */
+			rxrpc_complete = true;
+			break;
+		}
+
+		if (call->intr && timeout == 0 &&
 		    life == last_life && signal_pending(current)) {
 			if (stalled)
 				break;
@@ -663,12 +672,16 @@ static long afs_wait_for_call_to_complete(struct afs_call *call,
 	remove_wait_queue(&call->waitq, &myself);
 	__set_current_state(TASK_RUNNING);
 
-	/* Kill off the call if it's still live. */
 	if (!afs_check_call_state(call, AFS_CALL_COMPLETE)) {
-		_debug("call interrupted");
-		if (rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
-					    RX_USER_ABORT, -EINTR, "KWI"))
-			afs_set_call_complete(call, -EINTR, 0);
+		if (rxrpc_complete) {
+			afs_set_call_complete(call, call->error, call->abort_code);
+		} else {
+			/* Kill off the call if it's still live. */
+			_debug("call interrupted");
+			if (rxrpc_kernel_abort_call(call->net->socket, call->rxcall,
+						    RX_USER_ABORT, -EINTR, "KWI"))
+				afs_set_call_complete(call, -EINTR, 0);
+		}
 	}
 
 	spin_lock_bh(&call->state_lock);
@@ -679,16 +692,16 @@ static long afs_wait_for_call_to_complete(struct afs_call *call,
 	ret = ac->error;
 	switch (ret) {
 	case 0:
-		if (call->ret_reply0) {
-			ret = (long)call->reply[0];
-			call->reply[0] = NULL;
-		}
+		ret = call->ret0;
+		call->ret0 = 0;
+
 		/* Fall through */
 	case -ECONNABORTED:
 		ac->responded = true;
 		break;
 	}
 
+out:
 	_debug("call complete");
 	afs_put_call(call);
 	_leave(" = %p", (void *)ret);
@@ -909,6 +922,7 @@ void afs_send_empty_reply(struct afs_call *call)
 		_debug("oom");
 		rxrpc_kernel_abort_call(net->socket, call->rxcall,
 					RX_USER_ABORT, -ENOMEM, "KOO");
+		/* Fall through */
 	default:
 		_leave(" [error]");
 		return;
diff --git a/fs/afs/security.c b/fs/afs/security.c
index 5f58a9a17e69..71e71c07568f 100644
--- a/fs/afs/security.c
+++ b/fs/afs/security.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS security handling
  *
  * Copyright (C) 2007, 2017 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/init.h>
@@ -87,11 +83,9 @@ void afs_clear_permits(struct afs_vnode *vnode)
 	permits = rcu_dereference_protected(vnode->permit_cache,
 					    lockdep_is_held(&vnode->lock));
 	RCU_INIT_POINTER(vnode->permit_cache, NULL);
-	vnode->cb_break++;
 	spin_unlock(&vnode->lock);
 
-	if (permits)
-		afs_put_permits(permits);
+	afs_put_permits(permits);
 }
 
 /*
@@ -118,10 +112,10 @@ static void afs_hash_permits(struct afs_permits *permits)
  * as the ACL *may* have changed.
  */
 void afs_cache_permit(struct afs_vnode *vnode, struct key *key,
-		      unsigned int cb_break)
+		      unsigned int cb_break, struct afs_status_cb *scb)
 {
 	struct afs_permits *permits, *xpermits, *replacement, *zap, *new = NULL;
-	afs_access_t caller_access = READ_ONCE(vnode->status.caller_access);
+	afs_access_t caller_access = scb->status.caller_access;
 	size_t size = 0;
 	bool changed = false;
 	int i, j;
@@ -148,7 +142,7 @@ void afs_cache_permit(struct afs_vnode *vnode, struct key *key,
 				}
 
 				if (afs_cb_is_broken(cb_break, vnode,
-						     vnode->cb_interest)) {
+						     rcu_dereference(vnode->cb_interest))) {
 					changed = true;
 					break;
 				}
@@ -178,7 +172,7 @@ void afs_cache_permit(struct afs_vnode *vnode, struct key *key,
 		}
 	}
 
-	if (afs_cb_is_broken(cb_break, vnode, vnode->cb_interest))
+	if (afs_cb_is_broken(cb_break, vnode, rcu_dereference(vnode->cb_interest)))
 		goto someone_else_changed_it;
 
 	/* We need a ref on any permits list we want to copy as we'll have to
@@ -255,14 +249,16 @@ found:
 
 	kfree(new);
 
+	rcu_read_lock();
 	spin_lock(&vnode->lock);
 	zap = rcu_access_pointer(vnode->permit_cache);
-	if (!afs_cb_is_broken(cb_break, vnode, vnode->cb_interest) &&
+	if (!afs_cb_is_broken(cb_break, vnode, rcu_dereference(vnode->cb_interest)) &&
 	    zap == permits)
 		rcu_assign_pointer(vnode->permit_cache, replacement);
 	else
 		zap = replacement;
 	spin_unlock(&vnode->lock);
+	rcu_read_unlock();
 	afs_put_permits(zap);
 out_put:
 	afs_put_permits(permits);
@@ -322,13 +318,12 @@ int afs_check_permit(struct afs_vnode *vnode, struct key *key,
 		 */
 		_debug("no valid permit");
 
-		ret = afs_fetch_status(vnode, key, false);
+		ret = afs_fetch_status(vnode, key, false, _access);
 		if (ret < 0) {
 			*_access = 0;
 			_leave(" = %d", ret);
 			return ret;
 		}
-		*_access = vnode->status.caller_access;
 	}
 
 	_leave(" = 0 [access %x]", *_access);
diff --git a/fs/afs/server.c b/fs/afs/server.c
index 642afa2e9783..64d440aaabc0 100644
--- a/fs/afs/server.c
+++ b/fs/afs/server.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS server record management
  *
  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/sched.h>
@@ -17,6 +13,7 @@
 
 static unsigned afs_server_gc_delay = 10;	/* Server record timeout in seconds */
 static unsigned afs_server_update_delay = 30;	/* Time till VLDB recheck in secs */
+static atomic_t afs_server_debug_id;
 
 static void afs_inc_servers_outstanding(struct afs_net *net)
 {
@@ -51,7 +48,7 @@ struct afs_server *afs_find_server(struct afs_net *net,
 
 	do {
 		if (server)
-			afs_put_server(net, server);
+			afs_put_server(net, server, afs_server_trace_put_find_rsq);
 		server = NULL;
 		read_seqbegin_or_lock(&net->fs_addr_lock, &seq);
 
@@ -116,7 +113,7 @@ struct afs_server *afs_find_server_by_uuid(struct afs_net *net, const uuid_t *uu
 		 * changes.
 		 */
 		if (server)
-			afs_put_server(net, server);
+			afs_put_server(net, server, afs_server_trace_put_uuid_rsq);
 		server = NULL;
 
 		read_seqbegin_or_lock(&net->fs_lock, &seq);
@@ -131,7 +128,7 @@ struct afs_server *afs_find_server_by_uuid(struct afs_net *net, const uuid_t *uu
 			} else if (diff > 0) {
 				p = p->rb_right;
 			} else {
-				afs_get_server(server);
+				afs_get_server(server, afs_server_trace_get_by_uuid);
 				break;
 			}
 
@@ -202,7 +199,7 @@ static struct afs_server *afs_install_server(struct afs_net *net,
 	ret = 0;
 
 exists:
-	afs_get_server(server);
+	afs_get_server(server, afs_server_trace_get_install);
 	write_sequnlock(&net->fs_lock);
 	return server;
 }
@@ -223,10 +220,10 @@ static struct afs_server *afs_alloc_server(struct afs_net *net,
 		goto enomem;
 
 	atomic_set(&server->usage, 1);
+	server->debug_id = atomic_inc_return(&afs_server_debug_id);
 	RCU_INIT_POINTER(server->addresses, alist);
 	server->addr_version = alist->version;
 	server->uuid = *uuid;
-	server->flags = (1UL << AFS_SERVER_FL_NEW);
 	server->update_at = ktime_get_real_seconds() + afs_server_update_delay;
 	rwlock_init(&server->fs_lock);
 	INIT_HLIST_HEAD(&server->cb_volumes);
@@ -235,6 +232,7 @@ static struct afs_server *afs_alloc_server(struct afs_net *net,
 	spin_lock_init(&server->probe_lock);
 
 	afs_inc_servers_outstanding(net);
+	trace_afs_server(server, 1, afs_server_trace_alloc);
 	_leave(" = %p", server);
 	return server;
 
@@ -330,9 +328,22 @@ void afs_servers_timer(struct timer_list *timer)
 }
 
 /*
+ * Get a reference on a server object.
+ */
+struct afs_server *afs_get_server(struct afs_server *server,
+				  enum afs_server_trace reason)
+{
+	unsigned int u = atomic_inc_return(&server->usage);
+
+	trace_afs_server(server, u, reason);
+	return server;
+}
+
+/*
  * Release a reference on a server record.
  */
-void afs_put_server(struct afs_net *net, struct afs_server *server)
+void afs_put_server(struct afs_net *net, struct afs_server *server,
+		    enum afs_server_trace reason)
 {
 	unsigned int usage;
 
@@ -343,7 +354,7 @@ void afs_put_server(struct afs_net *net, struct afs_server *server)
 
 	usage = atomic_dec_return(&server->usage);
 
-	_enter("{%u}", usage);
+	trace_afs_server(server, usage, reason);
 
 	if (likely(usage > 0))
 		return;
@@ -355,6 +366,8 @@ static void afs_server_rcu(struct rcu_head *rcu)
 {
 	struct afs_server *server = container_of(rcu, struct afs_server, rcu);
 
+	trace_afs_server(server, atomic_read(&server->usage),
+			 afs_server_trace_free);
 	afs_put_addrlist(rcu_access_pointer(server->addresses));
 	kfree(server);
 }
@@ -370,7 +383,9 @@ static void afs_destroy_server(struct afs_net *net, struct afs_server *server)
 		.index	= alist->preferred,
 		.error	= 0,
 	};
-	_enter("%p", server);
+
+	trace_afs_server(server, atomic_read(&server->usage),
+			 afs_server_trace_give_up_cb);
 
 	if (test_bit(AFS_SERVER_FL_MAY_HAVE_CB, &server->flags))
 		afs_fs_give_up_all_callbacks(net, server, &ac, NULL);
@@ -378,6 +393,8 @@ static void afs_destroy_server(struct afs_net *net, struct afs_server *server)
 	wait_var_event(&server->probe_outstanding,
 		       atomic_read(&server->probe_outstanding) == 0);
 
+	trace_afs_server(server, atomic_read(&server->usage),
+			 afs_server_trace_destroy);
 	call_rcu(&server->rcu, afs_server_rcu);
 	afs_dec_servers_outstanding(net);
 }
@@ -397,6 +414,7 @@ static void afs_gc_servers(struct afs_net *net, struct afs_server *gc_list)
 		write_seqlock(&net->fs_lock);
 		usage = 1;
 		deleted = atomic_try_cmpxchg(&server->usage, &usage, 0);
+		trace_afs_server(server, usage, afs_server_trace_gc);
 		if (deleted) {
 			rb_erase(&server->uuid_rb, &net->fs_servers);
 			hlist_del_rcu(&server->proc_link);
@@ -519,11 +537,20 @@ static noinline bool afs_update_server_record(struct afs_fs_cursor *fc, struct a
 
 	_enter("");
 
+	trace_afs_server(server, atomic_read(&server->usage), afs_server_trace_update);
+
 	alist = afs_vl_lookup_addrs(fc->vnode->volume->cell, fc->key,
 				    &server->uuid);
 	if (IS_ERR(alist)) {
-		fc->ac.error = PTR_ERR(alist);
-		_leave(" = f [%d]", fc->ac.error);
+		if ((PTR_ERR(alist) == -ERESTARTSYS ||
+		     PTR_ERR(alist) == -EINTR) &&
+		    !(fc->flags & AFS_FS_CURSOR_INTR) &&
+		    server->addresses) {
+			_leave(" = t [intr]");
+			return true;
+		}
+		fc->error = PTR_ERR(alist);
+		_leave(" = f [%d]", fc->error);
 		return false;
 	}
 
@@ -575,7 +602,11 @@ retry:
 	ret = wait_on_bit(&server->flags, AFS_SERVER_FL_UPDATING,
 			  TASK_INTERRUPTIBLE);
 	if (ret == -ERESTARTSYS) {
-		fc->ac.error = ret;
+		if (!(fc->flags & AFS_FS_CURSOR_INTR) && server->addresses) {
+			_leave(" = t [intr]");
+			return true;
+		}
+		fc->error = ret;
 		_leave(" = f [intr]");
 		return false;
 	}
diff --git a/fs/afs/server_list.c b/fs/afs/server_list.c
index 155dc14caef9..888d91d195d9 100644
--- a/fs/afs/server_list.c
+++ b/fs/afs/server_list.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS fileserver list management.
  *
  * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -20,7 +16,8 @@ void afs_put_serverlist(struct afs_net *net, struct afs_server_list *slist)
 	if (slist && refcount_dec_and_test(&slist->usage)) {
 		for (i = 0; i < slist->nr_servers; i++) {
 			afs_put_cb_interest(net, slist->servers[i].cb_interest);
-			afs_put_server(net, slist->servers[i].server);
+			afs_put_server(net, slist->servers[i].server,
+				       afs_server_trace_put_slist);
 		}
 		kfree(slist);
 	}
@@ -71,7 +68,8 @@ struct afs_server_list *afs_alloc_server_list(struct afs_cell *cell,
 				break;
 		if (j < slist->nr_servers) {
 			if (slist->servers[j].server == server) {
-				afs_put_server(cell->net, server);
+				afs_put_server(cell->net, server,
+					       afs_server_trace_put_slist_isort);
 				continue;
 			}
 
diff --git a/fs/afs/super.c b/fs/afs/super.c
index dcd07fe99871..f18911e8d770 100644
--- a/fs/afs/super.c
+++ b/fs/afs/super.c
@@ -1,6 +1,6 @@
 /* AFS superblock handling
  *
- * Copyright (c) 2002, 2007 Red Hat, Inc. All rights reserved.
+ * Copyright (c) 2002, 2007, 2018 Red Hat, Inc. All rights reserved.
  *
  * This software may be freely redistributed under the terms of the
  * GNU General Public License.
@@ -21,7 +21,7 @@
 #include <linux/slab.h>
 #include <linux/fs.h>
 #include <linux/pagemap.h>
-#include <linux/parser.h>
+#include <linux/fs_parser.h>
 #include <linux/statfs.h>
 #include <linux/sched.h>
 #include <linux/nsproxy.h>
@@ -30,21 +30,23 @@
 #include "internal.h"
 
 static void afs_i_init_once(void *foo);
-static struct dentry *afs_mount(struct file_system_type *fs_type,
-		      int flags, const char *dev_name, void *data);
 static void afs_kill_super(struct super_block *sb);
 static struct inode *afs_alloc_inode(struct super_block *sb);
 static void afs_destroy_inode(struct inode *inode);
+static void afs_free_inode(struct inode *inode);
 static int afs_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int afs_show_devname(struct seq_file *m, struct dentry *root);
 static int afs_show_options(struct seq_file *m, struct dentry *root);
+static int afs_init_fs_context(struct fs_context *fc);
+static const struct fs_parameter_description afs_fs_parameters;
 
 struct file_system_type afs_fs_type = {
-	.owner		= THIS_MODULE,
-	.name		= "afs",
-	.mount		= afs_mount,
-	.kill_sb	= afs_kill_super,
-	.fs_flags	= 0,
+	.owner			= THIS_MODULE,
+	.name			= "afs",
+	.init_fs_context	= afs_init_fs_context,
+	.parameters		= &afs_fs_parameters,
+	.kill_sb		= afs_kill_super,
+	.fs_flags		= FS_RENAME_DOES_D_MOVE,
 };
 MODULE_ALIAS_FS("afs");
 
@@ -55,6 +57,7 @@ static const struct super_operations afs_super_ops = {
 	.alloc_inode	= afs_alloc_inode,
 	.drop_inode	= afs_drop_inode,
 	.destroy_inode	= afs_destroy_inode,
+	.free_inode	= afs_free_inode,
 	.evict_inode	= afs_evict_inode,
 	.show_devname	= afs_show_devname,
 	.show_options	= afs_show_options,
@@ -63,22 +66,33 @@ static const struct super_operations afs_super_ops = {
 static struct kmem_cache *afs_inode_cachep;
 static atomic_t afs_count_active_inodes;
 
-enum {
-	afs_no_opt,
-	afs_opt_cell,
-	afs_opt_dyn,
-	afs_opt_rwpath,
-	afs_opt_vol,
-	afs_opt_autocell,
+enum afs_param {
+	Opt_autocell,
+	Opt_dyn,
+	Opt_flock,
+	Opt_source,
 };
 
-static const match_table_t afs_options_list = {
-	{ afs_opt_cell,		"cell=%s"	},
-	{ afs_opt_dyn,		"dyn"		},
-	{ afs_opt_rwpath,	"rwpath"	},
-	{ afs_opt_vol,		"vol=%s"	},
-	{ afs_opt_autocell,	"autocell"	},
-	{ afs_no_opt,		NULL		},
+static const struct fs_parameter_spec afs_param_specs[] = {
+	fsparam_flag  ("autocell",	Opt_autocell),
+	fsparam_flag  ("dyn",		Opt_dyn),
+	fsparam_enum  ("flock",		Opt_flock),
+	fsparam_string("source",	Opt_source),
+	{}
+};
+
+static const struct fs_parameter_enum afs_param_enums[] = {
+	{ Opt_flock,	"local",	afs_flock_mode_local },
+	{ Opt_flock,	"openafs",	afs_flock_mode_openafs },
+	{ Opt_flock,	"strict",	afs_flock_mode_strict },
+	{ Opt_flock,	"write",	afs_flock_mode_write },
+	{}
+};
+
+static const struct fs_parameter_description afs_fs_parameters = {
+	.name		= "kAFS",
+	.specs		= afs_param_specs,
+	.enums		= afs_param_enums,
 };
 
 /*
@@ -181,93 +195,43 @@ static int afs_show_devname(struct seq_file *m, struct dentry *root)
 static int afs_show_options(struct seq_file *m, struct dentry *root)
 {
 	struct afs_super_info *as = AFS_FS_S(root->d_sb);
+	const char *p = NULL;
 
 	if (as->dyn_root)
 		seq_puts(m, ",dyn");
 	if (test_bit(AFS_VNODE_AUTOCELL, &AFS_FS_I(d_inode(root))->flags))
 		seq_puts(m, ",autocell");
-	return 0;
-}
-
-/*
- * parse the mount options
- * - this function has been shamelessly adapted from the ext3 fs which
- *   shamelessly adapted it from the msdos fs
- */
-static int afs_parse_options(struct afs_mount_params *params,
-			     char *options, const char **devname)
-{
-	struct afs_cell *cell;
-	substring_t args[MAX_OPT_ARGS];
-	char *p;
-	int token;
-
-	_enter("%s", options);
-
-	options[PAGE_SIZE - 1] = 0;
-
-	while ((p = strsep(&options, ","))) {
-		if (!*p)
-			continue;
-
-		token = match_token(p, afs_options_list, args);
-		switch (token) {
-		case afs_opt_cell:
-			rcu_read_lock();
-			cell = afs_lookup_cell_rcu(params->net,
-						   args[0].from,
-						   args[0].to - args[0].from);
-			rcu_read_unlock();
-			if (IS_ERR(cell))
-				return PTR_ERR(cell);
-			afs_put_cell(params->net, params->cell);
-			params->cell = cell;
-			break;
-
-		case afs_opt_rwpath:
-			params->rwpath = true;
-			break;
-
-		case afs_opt_vol:
-			*devname = args[0].from;
-			break;
-
-		case afs_opt_autocell:
-			params->autocell = true;
-			break;
-
-		case afs_opt_dyn:
-			params->dyn_root = true;
-			break;
-
-		default:
-			printk(KERN_ERR "kAFS:"
-			       " Unknown or invalid mount option: '%s'\n", p);
-			return -EINVAL;
-		}
+	switch (as->flock_mode) {
+	case afs_flock_mode_unset:	break;
+	case afs_flock_mode_local:	p = "local";	break;
+	case afs_flock_mode_openafs:	p = "openafs";	break;
+	case afs_flock_mode_strict:	p = "strict";	break;
+	case afs_flock_mode_write:	p = "write";	break;
 	}
+	if (p)
+		seq_printf(m, ",flock=%s", p);
 
-	_leave(" = 0");
 	return 0;
 }
 
 /*
- * parse a device name to get cell name, volume name, volume type and R/W
- * selector
- * - this can be one of the following:
+ * Parse the source name to get cell name, volume name, volume type and R/W
+ * selector.
+ *
+ * This can be one of the following:
  *	"%[cell:]volume[.]"		R/W volume
- *	"#[cell:]volume[.]"		R/O or R/W volume (rwpath=0),
- *					 or R/W (rwpath=1) volume
+ *	"#[cell:]volume[.]"		R/O or R/W volume (R/O parent),
+ *					 or R/W (R/W parent) volume
  *	"%[cell:]volume.readonly"	R/O volume
  *	"#[cell:]volume.readonly"	R/O volume
  *	"%[cell:]volume.backup"		Backup volume
  *	"#[cell:]volume.backup"		Backup volume
  */
-static int afs_parse_device_name(struct afs_mount_params *params,
-				 const char *name)
+static int afs_parse_source(struct fs_context *fc, struct fs_parameter *param)
 {
+	struct afs_fs_context *ctx = fc->fs_private;
 	struct afs_cell *cell;
-	const char *cellname, *suffix;
+	const char *cellname, *suffix, *name = param->string;
 	int cellnamesz;
 
 	_enter(",%s", name);
@@ -278,69 +242,153 @@ static int afs_parse_device_name(struct afs_mount_params *params,
 	}
 
 	if ((name[0] != '%' && name[0] != '#') || !name[1]) {
+		/* To use dynroot, we don't want to have to provide a source */
+		if (strcmp(name, "none") == 0) {
+			ctx->no_cell = true;
+			return 0;
+		}
 		printk(KERN_ERR "kAFS: unparsable volume name\n");
 		return -EINVAL;
 	}
 
 	/* determine the type of volume we're looking for */
-	params->type = AFSVL_ROVOL;
-	params->force = false;
-	if (params->rwpath || name[0] == '%') {
-		params->type = AFSVL_RWVOL;
-		params->force = true;
+	if (name[0] == '%') {
+		ctx->type = AFSVL_RWVOL;
+		ctx->force = true;
 	}
 	name++;
 
 	/* split the cell name out if there is one */
-	params->volname = strchr(name, ':');
-	if (params->volname) {
+	ctx->volname = strchr(name, ':');
+	if (ctx->volname) {
 		cellname = name;
-		cellnamesz = params->volname - name;
-		params->volname++;
+		cellnamesz = ctx->volname - name;
+		ctx->volname++;
 	} else {
-		params->volname = name;
+		ctx->volname = name;
 		cellname = NULL;
 		cellnamesz = 0;
 	}
 
 	/* the volume type is further affected by a possible suffix */
-	suffix = strrchr(params->volname, '.');
+	suffix = strrchr(ctx->volname, '.');
 	if (suffix) {
 		if (strcmp(suffix, ".readonly") == 0) {
-			params->type = AFSVL_ROVOL;
-			params->force = true;
+			ctx->type = AFSVL_ROVOL;
+			ctx->force = true;
 		} else if (strcmp(suffix, ".backup") == 0) {
-			params->type = AFSVL_BACKVOL;
-			params->force = true;
+			ctx->type = AFSVL_BACKVOL;
+			ctx->force = true;
 		} else if (suffix[1] == 0) {
 		} else {
 			suffix = NULL;
 		}
 	}
 
-	params->volnamesz = suffix ?
-		suffix - params->volname : strlen(params->volname);
+	ctx->volnamesz = suffix ?
+		suffix - ctx->volname : strlen(ctx->volname);
 
 	_debug("cell %*.*s [%p]",
-	       cellnamesz, cellnamesz, cellname ?: "", params->cell);
+	       cellnamesz, cellnamesz, cellname ?: "", ctx->cell);
 
 	/* lookup the cell record */
-	if (cellname || !params->cell) {
-		cell = afs_lookup_cell(params->net, cellname, cellnamesz,
+	if (cellname) {
+		cell = afs_lookup_cell(ctx->net, cellname, cellnamesz,
 				       NULL, false);
 		if (IS_ERR(cell)) {
-			printk(KERN_ERR "kAFS: unable to lookup cell '%*.*s'\n",
+			pr_err("kAFS: unable to lookup cell '%*.*s'\n",
 			       cellnamesz, cellnamesz, cellname ?: "");
 			return PTR_ERR(cell);
 		}
-		afs_put_cell(params->net, params->cell);
-		params->cell = cell;
+		afs_put_cell(ctx->net, ctx->cell);
+		ctx->cell = cell;
 	}
 
 	_debug("CELL:%s [%p] VOLUME:%*.*s SUFFIX:%s TYPE:%d%s",
-	       params->cell->name, params->cell,
-	       params->volnamesz, params->volnamesz, params->volname,
-	       suffix ?: "-", params->type, params->force ? " FORCE" : "");
+	       ctx->cell->name, ctx->cell,
+	       ctx->volnamesz, ctx->volnamesz, ctx->volname,
+	       suffix ?: "-", ctx->type, ctx->force ? " FORCE" : "");
+
+	fc->source = param->string;
+	param->string = NULL;
+	return 0;
+}
+
+/*
+ * Parse a single mount parameter.
+ */
+static int afs_parse_param(struct fs_context *fc, struct fs_parameter *param)
+{
+	struct fs_parse_result result;
+	struct afs_fs_context *ctx = fc->fs_private;
+	int opt;
+
+	opt = fs_parse(fc, &afs_fs_parameters, param, &result);
+	if (opt < 0)
+		return opt;
+
+	switch (opt) {
+	case Opt_source:
+		return afs_parse_source(fc, param);
+
+	case Opt_autocell:
+		ctx->autocell = true;
+		break;
+
+	case Opt_dyn:
+		ctx->dyn_root = true;
+		break;
+
+	case Opt_flock:
+		ctx->flock_mode = result.uint_32;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	_leave(" = 0");
+	return 0;
+}
+
+/*
+ * Validate the options, get the cell key and look up the volume.
+ */
+static int afs_validate_fc(struct fs_context *fc)
+{
+	struct afs_fs_context *ctx = fc->fs_private;
+	struct afs_volume *volume;
+	struct key *key;
+
+	if (!ctx->dyn_root) {
+		if (ctx->no_cell) {
+			pr_warn("kAFS: Can only specify source 'none' with -o dyn\n");
+			return -EINVAL;
+		}
+
+		if (!ctx->cell) {
+			pr_warn("kAFS: No cell specified\n");
+			return -EDESTADDRREQ;
+		}
+
+		/* We try to do the mount securely. */
+		key = afs_request_key(ctx->cell);
+		if (IS_ERR(key))
+			return PTR_ERR(key);
+
+		ctx->key = key;
+
+		if (ctx->volume) {
+			afs_put_volume(ctx->cell, ctx->volume);
+			ctx->volume = NULL;
+		}
+
+		volume = afs_create_volume(ctx);
+		if (IS_ERR(volume))
+			return PTR_ERR(volume);
+
+		ctx->volume = volume;
+	}
 
 	return 0;
 }
@@ -348,42 +396,37 @@ static int afs_parse_device_name(struct afs_mount_params *params,
 /*
  * check a superblock to see if it's the one we're looking for
  */
-static int afs_test_super(struct super_block *sb, void *data)
+static int afs_test_super(struct super_block *sb, struct fs_context *fc)
 {
-	struct afs_super_info *as1 = data;
+	struct afs_fs_context *ctx = fc->fs_private;
 	struct afs_super_info *as = AFS_FS_S(sb);
 
-	return (as->net_ns == as1->net_ns &&
+	return (as->net_ns == fc->net_ns &&
 		as->volume &&
-		as->volume->vid == as1->volume->vid &&
+		as->volume->vid == ctx->volume->vid &&
 		!as->dyn_root);
 }
 
-static int afs_dynroot_test_super(struct super_block *sb, void *data)
+static int afs_dynroot_test_super(struct super_block *sb, struct fs_context *fc)
 {
-	struct afs_super_info *as1 = data;
 	struct afs_super_info *as = AFS_FS_S(sb);
 
-	return (as->net_ns == as1->net_ns &&
+	return (as->net_ns == fc->net_ns &&
 		as->dyn_root);
 }
 
-static int afs_set_super(struct super_block *sb, void *data)
+static int afs_set_super(struct super_block *sb, struct fs_context *fc)
 {
-	struct afs_super_info *as = data;
-
-	sb->s_fs_info = as;
 	return set_anon_super(sb, NULL);
 }
 
 /*
  * fill in the superblock
  */
-static int afs_fill_super(struct super_block *sb,
-			  struct afs_mount_params *params)
+static int afs_fill_super(struct super_block *sb, struct afs_fs_context *ctx)
 {
 	struct afs_super_info *as = AFS_FS_S(sb);
-	struct afs_fid fid;
+	struct afs_iget_data iget_data;
 	struct inode *inode = NULL;
 	int ret;
 
@@ -399,7 +442,7 @@ static int afs_fill_super(struct super_block *sb,
 	ret = super_setup_bdi(sb);
 	if (ret)
 		return ret;
-	sb->s_bdi->ra_pages	= VM_MAX_READAHEAD * 1024 / PAGE_SIZE;
+	sb->s_bdi->ra_pages	= VM_READAHEAD_PAGES;
 
 	/* allocate the root inode and dentry */
 	if (as->dyn_root) {
@@ -408,17 +451,19 @@ static int afs_fill_super(struct super_block *sb,
 	} else {
 		sprintf(sb->s_id, "%llu", as->volume->vid);
 		afs_activate_volume(as->volume);
-		fid.vid		= as->volume->vid;
-		fid.vnode	= 1;
-		fid.vnode_hi	= 0;
-		fid.unique	= 1;
-		inode = afs_iget(sb, params->key, &fid, NULL, NULL, NULL);
+		iget_data.fid.vid	= as->volume->vid;
+		iget_data.fid.vnode	= 1;
+		iget_data.fid.vnode_hi	= 0;
+		iget_data.fid.unique	= 1;
+		iget_data.cb_v_break	= as->volume->cb_v_break;
+		iget_data.cb_s_break	= 0;
+		inode = afs_iget(sb, ctx->key, &iget_data, NULL, NULL, NULL);
 	}
 
 	if (IS_ERR(inode))
 		return PTR_ERR(inode);
 
-	if (params->autocell || params->dyn_root)
+	if (ctx->autocell || as->dyn_root)
 		set_bit(AFS_VNODE_AUTOCELL, &AFS_FS_I(inode)->flags);
 
 	ret = -ENOMEM;
@@ -443,17 +488,21 @@ error:
 	return ret;
 }
 
-static struct afs_super_info *afs_alloc_sbi(struct afs_mount_params *params)
+static struct afs_super_info *afs_alloc_sbi(struct fs_context *fc)
 {
+	struct afs_fs_context *ctx = fc->fs_private;
 	struct afs_super_info *as;
 
 	as = kzalloc(sizeof(struct afs_super_info), GFP_KERNEL);
 	if (as) {
-		as->net_ns = get_net(params->net_ns);
-		if (params->dyn_root)
+		as->net_ns = get_net(fc->net_ns);
+		as->flock_mode = ctx->flock_mode;
+		if (ctx->dyn_root) {
 			as->dyn_root = true;
-		else
-			as->cell = afs_get_cell(params->cell);
+		} else {
+			as->cell = afs_get_cell(ctx->cell);
+			as->volume = __afs_get_volume(ctx->volume);
+		}
 	}
 	return as;
 }
@@ -475,7 +524,7 @@ static void afs_kill_super(struct super_block *sb)
 
 	if (as->dyn_root)
 		afs_dynroot_depopulate(sb);
-	
+
 	/* Clear the callback interests (which will do ilookup5) before
 	 * deactivating the superblock.
 	 */
@@ -488,111 +537,104 @@ static void afs_kill_super(struct super_block *sb)
 }
 
 /*
- * get an AFS superblock
+ * Get an AFS superblock and root directory.
  */
-static struct dentry *afs_mount(struct file_system_type *fs_type,
-				int flags, const char *dev_name, void *options)
+static int afs_get_tree(struct fs_context *fc)
 {
-	struct afs_mount_params params;
+	struct afs_fs_context *ctx = fc->fs_private;
 	struct super_block *sb;
-	struct afs_volume *candidate;
-	struct key *key;
 	struct afs_super_info *as;
 	int ret;
 
-	_enter(",,%s,%p", dev_name, options);
-
-	memset(&params, 0, sizeof(params));
-
-	ret = -EINVAL;
-	if (current->nsproxy->net_ns != &init_net)
+	ret = afs_validate_fc(fc);
+	if (ret)
 		goto error;
-	params.net_ns = current->nsproxy->net_ns;
-	params.net = afs_net(params.net_ns);
-	
-	/* parse the options and device name */
-	if (options) {
-		ret = afs_parse_options(&params, options, &dev_name);
-		if (ret < 0)
-			goto error;
-	}
-
-	if (!params.dyn_root) {
-		ret = afs_parse_device_name(&params, dev_name);
-		if (ret < 0)
-			goto error;
 
-		/* try and do the mount securely */
-		key = afs_request_key(params.cell);
-		if (IS_ERR(key)) {
-			_leave(" = %ld [key]", PTR_ERR(key));
-			ret = PTR_ERR(key);
-			goto error;
-		}
-		params.key = key;
-	}
+	_enter("");
 
 	/* allocate a superblock info record */
 	ret = -ENOMEM;
-	as = afs_alloc_sbi(&params);
+	as = afs_alloc_sbi(fc);
 	if (!as)
-		goto error_key;
-
-	if (!params.dyn_root) {
-		/* Assume we're going to need a volume record; at the very
-		 * least we can use it to update the volume record if we have
-		 * one already.  This checks that the volume exists within the
-		 * cell.
-		 */
-		candidate = afs_create_volume(&params);
-		if (IS_ERR(candidate)) {
-			ret = PTR_ERR(candidate);
-			goto error_as;
-		}
-
-		as->volume = candidate;
-	}
+		goto error;
+	fc->s_fs_info = as;
 
 	/* allocate a deviceless superblock */
-	sb = sget(fs_type,
-		  as->dyn_root ? afs_dynroot_test_super : afs_test_super,
-		  afs_set_super, flags, as);
+	sb = sget_fc(fc,
+		     as->dyn_root ? afs_dynroot_test_super : afs_test_super,
+		     afs_set_super);
 	if (IS_ERR(sb)) {
 		ret = PTR_ERR(sb);
-		goto error_as;
+		goto error;
 	}
 
 	if (!sb->s_root) {
 		/* initial superblock/root creation */
 		_debug("create");
-		ret = afs_fill_super(sb, &params);
+		ret = afs_fill_super(sb, ctx);
 		if (ret < 0)
 			goto error_sb;
-		as = NULL;
 		sb->s_flags |= SB_ACTIVE;
 	} else {
 		_debug("reuse");
 		ASSERTCMP(sb->s_flags, &, SB_ACTIVE);
-		afs_destroy_sbi(as);
-		as = NULL;
 	}
 
-	afs_put_cell(params.net, params.cell);
-	key_put(params.key);
+	fc->root = dget(sb->s_root);
+	trace_afs_get_tree(as->cell, as->volume);
 	_leave(" = 0 [%p]", sb);
-	return dget(sb->s_root);
+	return 0;
 
 error_sb:
 	deactivate_locked_super(sb);
-	goto error_key;
-error_as:
-	afs_destroy_sbi(as);
-error_key:
-	key_put(params.key);
 error:
-	afs_put_cell(params.net, params.cell);
 	_leave(" = %d", ret);
-	return ERR_PTR(ret);
+	return ret;
+}
+
+static void afs_free_fc(struct fs_context *fc)
+{
+	struct afs_fs_context *ctx = fc->fs_private;
+
+	afs_destroy_sbi(fc->s_fs_info);
+	afs_put_volume(ctx->cell, ctx->volume);
+	afs_put_cell(ctx->net, ctx->cell);
+	key_put(ctx->key);
+	kfree(ctx);
+}
+
+static const struct fs_context_operations afs_context_ops = {
+	.free		= afs_free_fc,
+	.parse_param	= afs_parse_param,
+	.get_tree	= afs_get_tree,
+};
+
+/*
+ * Set up the filesystem mount context.
+ */
+static int afs_init_fs_context(struct fs_context *fc)
+{
+	struct afs_fs_context *ctx;
+	struct afs_cell *cell;
+
+	ctx = kzalloc(sizeof(struct afs_fs_context), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->type = AFSVL_ROVOL;
+	ctx->net = afs_net(fc->net_ns);
+
+	/* Default to the workstation cell. */
+	rcu_read_lock();
+	cell = afs_lookup_cell_rcu(ctx->net, NULL, 0);
+	rcu_read_unlock();
+	if (IS_ERR(cell))
+		cell = NULL;
+	ctx->cell = cell;
+
+	fc->fs_private = ctx;
+	fc->ops = &afs_context_ops;
+	return 0;
 }
 
 /*
@@ -637,24 +679,23 @@ static struct inode *afs_alloc_inode(struct super_block *sb)
 	vnode->volume		= NULL;
 	vnode->lock_key		= NULL;
 	vnode->permit_cache	= NULL;
-	vnode->cb_interest	= NULL;
+	RCU_INIT_POINTER(vnode->cb_interest, NULL);
 #ifdef CONFIG_AFS_FSCACHE
 	vnode->cache		= NULL;
 #endif
 
 	vnode->flags		= 1 << AFS_VNODE_UNSET;
-	vnode->cb_type		= 0;
 	vnode->lock_state	= AFS_VNODE_LOCK_NONE;
 
+	init_rwsem(&vnode->rmdir_lock);
+
 	_leave(" = %p", &vnode->vfs_inode);
 	return &vnode->vfs_inode;
 }
 
-static void afs_i_callback(struct rcu_head *head)
+static void afs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	struct afs_vnode *vnode = AFS_FS_I(inode);
-	kmem_cache_free(afs_inode_cachep, vnode);
+	kmem_cache_free(afs_inode_cachep, AFS_FS_I(inode));
 }
 
 /*
@@ -668,9 +709,8 @@ static void afs_destroy_inode(struct inode *inode)
 
 	_debug("DESTROY INODE %p", inode);
 
-	ASSERTCMP(vnode->cb_interest, ==, NULL);
+	ASSERTCMP(rcu_access_pointer(vnode->cb_interest), ==, NULL);
 
-	call_rcu(&inode->i_rcu, afs_i_callback);
 	atomic_dec(&afs_count_active_inodes);
 }
 
@@ -702,7 +742,7 @@ static int afs_statfs(struct dentry *dentry, struct kstatfs *buf)
 		return PTR_ERR(key);
 
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, vnode, key)) {
+	if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
 		fc.flags |= AFS_FS_CURSOR_NO_VSLEEP;
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(vnode);
@@ -710,7 +750,6 @@ static int afs_statfs(struct dentry *dentry, struct kstatfs *buf)
 		}
 
 		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, vnode, fc.cb_break);
 		ret = afs_end_vnode_operation(&fc);
 	}
 
diff --git a/fs/afs/vl_list.c b/fs/afs/vl_list.c
index b4f1a84519b9..21eb0c0be912 100644
--- a/fs/afs/vl_list.c
+++ b/fs/afs/vl_list.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS vlserver list management.
  *
  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -232,18 +228,16 @@ struct afs_vlserver_list *afs_extract_vlserver_list(struct afs_cell *cell,
 		if (bs.status > NR__dns_lookup_status)
 			bs.status = NR__dns_lookup_status;
 
+		/* See if we can update an old server record */
 		server = NULL;
-		if (previous) {
-			/* See if we can update an old server record */
-			for (i = 0; i < previous->nr_servers; i++) {
-				struct afs_vlserver *p = previous->servers[i].server;
-
-				if (p->name_len == bs.name_len &&
-				    p->port == bs.port &&
-				    strncasecmp(b, p->name, bs.name_len) == 0) {
-					server = afs_get_vlserver(p);
-					break;
-				}
+		for (i = 0; i < previous->nr_servers; i++) {
+			struct afs_vlserver *p = previous->servers[i].server;
+
+			if (p->name_len == bs.name_len &&
+			    p->port == bs.port &&
+			    strncasecmp(b, p->name, bs.name_len) == 0) {
+				server = afs_get_vlserver(p);
+				break;
 			}
 		}
 
diff --git a/fs/afs/vl_probe.c b/fs/afs/vl_probe.c
index f402ee8171a1..858498cc1b05 100644
--- a/fs/afs/vl_probe.c
+++ b/fs/afs/vl_probe.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS vlserver probing
  *
  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/sched.h>
@@ -33,8 +29,8 @@ static bool afs_vl_probe_done(struct afs_vlserver *server)
 void afs_vlserver_probe_result(struct afs_call *call)
 {
 	struct afs_addr_list *alist = call->alist;
-	struct afs_vlserver *server = call->reply[0];
-	unsigned int server_index = (long)call->reply[1];
+	struct afs_vlserver *server = call->vlserver;
+	unsigned int server_index = call->server_index;
 	unsigned int index = call->addr_ix;
 	unsigned int rtt = UINT_MAX;
 	bool have_result = false;
@@ -141,8 +137,8 @@ static bool afs_do_probe_vlserver(struct afs_net *net,
 	struct afs_addr_cursor ac = {
 		.index = 0,
 	};
+	struct afs_call *call;
 	bool in_progress = false;
-	int err;
 
 	_enter("%s", server->name);
 
@@ -156,12 +152,14 @@ static bool afs_do_probe_vlserver(struct afs_net *net,
 	server->probe.rtt = UINT_MAX;
 
 	for (ac.index = 0; ac.index < ac.alist->nr_addrs; ac.index++) {
-		err = afs_vl_get_capabilities(net, &ac, key, server,
-					      server_index, true);
-		if (err == -EINPROGRESS)
+		call = afs_vl_get_capabilities(net, &ac, key, server,
+					       server_index);
+		if (!IS_ERR(call)) {
+			afs_put_call(call);
 			in_progress = true;
-		else
-			afs_prioritise_error(_e, err, ac.abort_code);
+		} else {
+			afs_prioritise_error(_e, PTR_ERR(call), ac.abort_code);
+		}
 	}
 
 	if (!in_progress)
diff --git a/fs/afs/vl_rotate.c b/fs/afs/vl_rotate.c
index 7adde83a0648..9a5ce9687779 100644
--- a/fs/afs/vl_rotate.c
+++ b/fs/afs/vl_rotate.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Handle vlserver selection and rotation.
  *
  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -43,11 +39,29 @@ bool afs_begin_vlserver_operation(struct afs_vl_cursor *vc, struct afs_cell *cel
 static bool afs_start_vl_iteration(struct afs_vl_cursor *vc)
 {
 	struct afs_cell *cell = vc->cell;
+	unsigned int dns_lookup_count;
+
+	if (cell->dns_source == DNS_RECORD_UNAVAILABLE ||
+	    cell->dns_expiry <= ktime_get_real_seconds()) {
+		dns_lookup_count = smp_load_acquire(&cell->dns_lookup_count);
+		set_bit(AFS_CELL_FL_DO_LOOKUP, &cell->flags);
+		queue_work(afs_wq, &cell->manager);
+
+		if (cell->dns_source == DNS_RECORD_UNAVAILABLE) {
+			if (wait_var_event_interruptible(
+				    &cell->dns_lookup_count,
+				    smp_load_acquire(&cell->dns_lookup_count)
+				    != dns_lookup_count) < 0) {
+				vc->error = -ERESTARTSYS;
+				return false;
+			}
+		}
 
-	if (wait_on_bit(&cell->flags, AFS_CELL_FL_NO_LOOKUP_YET,
-			TASK_INTERRUPTIBLE)) {
-		vc->error = -ERESTARTSYS;
-		return false;
+		/* Status load is ordered after lookup counter load */
+		if (cell->dns_source == DNS_RECORD_UNAVAILABLE) {
+			vc->error = -EDESTADDRREQ;
+			return false;
+		}
 	}
 
 	read_lock(&cell->vl_servers_lock);
@@ -55,7 +69,7 @@ static bool afs_start_vl_iteration(struct afs_vl_cursor *vc)
 		rcu_dereference_protected(cell->vl_servers,
 					  lockdep_is_held(&cell->vl_servers_lock)));
 	read_unlock(&cell->vl_servers_lock);
-	if (!vc->server_list || !vc->server_list->nr_servers)
+	if (!vc->server_list->nr_servers)
 		return false;
 
 	vc->untried = (1UL << vc->server_list->nr_servers) - 1;
diff --git a/fs/afs/vlclient.c b/fs/afs/vlclient.c
index c3d9e5a5f67e..d7e0fd3c00df 100644
--- a/fs/afs/vlclient.c
+++ b/fs/afs/vlclient.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS Volume Location Service client
  *
  * Copyright (C) 2002 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/gfp.h>
@@ -34,7 +30,7 @@ static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call)
 
 	/* unmarshall the reply once we've received all of it */
 	uvldb = call->buffer;
-	entry = call->reply[0];
+	entry = call->ret_vldb;
 
 	nr_servers = ntohl(uvldb->nServers);
 	if (nr_servers > AFS_NMAXNSERVERS)
@@ -110,7 +106,7 @@ static int afs_deliver_vl_get_entry_by_name_u(struct afs_call *call)
 
 static void afs_destroy_vl_get_entry_by_name_u(struct afs_call *call)
 {
-	kfree(call->reply[0]);
+	kfree(call->ret_vldb);
 	afs_flat_call_destructor(call);
 }
 
@@ -155,8 +151,8 @@ struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *vc,
 	}
 
 	call->key = vc->key;
-	call->reply[0] = entry;
-	call->ret_reply0 = true;
+	call->ret_vldb = entry;
+	call->max_lifespan = AFS_VL_MAX_LIFESPAN;
 
 	/* Marshall the parameters */
 	bp = call->request;
@@ -167,7 +163,8 @@ struct afs_vldb_entry *afs_vl_get_entry_by_name_u(struct afs_vl_cursor *vc,
 		memset((void *)bp + volnamesz, 0, padsz);
 
 	trace_afs_make_vl_call(call);
-	return (struct afs_vldb_entry *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
+	afs_make_call(&vc->ac, call, GFP_KERNEL);
+	return (struct afs_vldb_entry *)afs_wait_for_call_to_complete(call, &vc->ac);
 }
 
 /*
@@ -195,7 +192,9 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 				   sizeof(struct afs_uuid__xdr) + 3 * sizeof(__be32));
 		call->unmarshall++;
 
-		/* Extract the returned uuid, uniquifier, nentries and blkaddrs size */
+		/* Extract the returned uuid, uniquifier, nentries and
+		 * blkaddrs size */
+		/* Fall through */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -211,7 +210,7 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 		if (!alist)
 			return -ENOMEM;
 		alist->version = uniquifier;
-		call->reply[0] = alist;
+		call->ret_alist = alist;
 		call->count = count;
 		call->count2 = nentries;
 		call->unmarshall++;
@@ -220,13 +219,13 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 		count = min(call->count, 4U);
 		afs_extract_to_buf(call, count * sizeof(__be32));
 
-		/* Extract entries */
+		/* Fall through - and extract entries */
 	case 2:
 		ret = afs_extract_data(call, call->count > 4);
 		if (ret < 0)
 			return ret;
 
-		alist = call->reply[0];
+		alist = call->ret_alist;
 		bp = call->buffer;
 		count = min(call->count, 4U);
 		for (i = 0; i < count; i++)
@@ -246,8 +245,7 @@ static int afs_deliver_vl_get_addrs_u(struct afs_call *call)
 
 static void afs_vl_get_addrs_u_destructor(struct afs_call *call)
 {
-	afs_put_server(call->net, (struct afs_server *)call->reply[0]);
-	kfree(call->reply[1]);
+	afs_put_addrlist(call->ret_alist);
 	return afs_flat_call_destructor(call);
 }
 
@@ -284,8 +282,8 @@ struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *vc,
 		return ERR_PTR(-ENOMEM);
 
 	call->key = vc->key;
-	call->reply[0] = NULL;
-	call->ret_reply0 = true;
+	call->ret_alist = NULL;
+	call->max_lifespan = AFS_VL_MAX_LIFESPAN;
 
 	/* Marshall the parameters */
 	bp = call->request;
@@ -304,7 +302,8 @@ struct afs_addr_list *afs_vl_get_addrs_u(struct afs_vl_cursor *vc,
 		r->uuid.node[i] = htonl(u->node[i]);
 
 	trace_afs_make_vl_call(call);
-	return (struct afs_addr_list *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
+	afs_make_call(&vc->ac, call, GFP_KERNEL);
+	return (struct afs_addr_list *)afs_wait_for_call_to_complete(call, &vc->ac);
 }
 
 /*
@@ -323,7 +322,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* Extract the capabilities word count */
+		/* Fall through - and extract the capabilities word count */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -336,7 +335,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
 		call->unmarshall++;
 		afs_extract_discard(call, count * sizeof(__be32));
 
-		/* Extract capabilities words */
+		/* Fall through - and extract capabilities words */
 	case 2:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -354,9 +353,7 @@ static int afs_deliver_vl_get_capabilities(struct afs_call *call)
 
 static void afs_destroy_vl_get_capabilities(struct afs_call *call)
 {
-	struct afs_vlserver *server = call->reply[0];
-
-	afs_put_vlserver(call->net, server);
+	afs_put_vlserver(call->net, call->vlserver);
 	afs_flat_call_destructor(call);
 }
 
@@ -378,12 +375,11 @@ static const struct afs_call_type afs_RXVLGetCapabilities = {
  * We use this to probe for service upgrade to determine what the server at the
  * other end supports.
  */
-int afs_vl_get_capabilities(struct afs_net *net,
-			    struct afs_addr_cursor *ac,
-			    struct key *key,
-			    struct afs_vlserver *server,
-			    unsigned int server_index,
-			    bool async)
+struct afs_call *afs_vl_get_capabilities(struct afs_net *net,
+					 struct afs_addr_cursor *ac,
+					 struct key *key,
+					 struct afs_vlserver *server,
+					 unsigned int server_index)
 {
 	struct afs_call *call;
 	__be32 *bp;
@@ -392,13 +388,14 @@ int afs_vl_get_capabilities(struct afs_net *net,
 
 	call = afs_alloc_flat_call(net, &afs_RXVLGetCapabilities, 1 * 4, 16 * 4);
 	if (!call)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 
 	call->key = key;
-	call->reply[0] = afs_get_vlserver(server);
-	call->reply[1] = (void *)(long)server_index;
+	call->vlserver = afs_get_vlserver(server);
+	call->server_index = server_index;
 	call->upgrade = true;
-	call->want_reply_time = true;
+	call->async = true;
+	call->max_lifespan = AFS_PROBE_MAX_LIFESPAN;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -406,7 +403,8 @@ int afs_vl_get_capabilities(struct afs_net *net,
 
 	/* Can't take a ref on server */
 	trace_afs_make_vl_call(call);
-	return afs_make_call(ac, call, GFP_KERNEL, async);
+	afs_make_call(ac, call, GFP_KERNEL);
+	return call;
 }
 
 /*
@@ -436,6 +434,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		/* Extract the returned uuid, uniquifier, fsEndpoints count and
 		 * either the first fsEndpoint type or the volEndpoints
 		 * count if there are no fsEndpoints. */
+		/* Fall through */
 	case 1:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -454,7 +453,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		if (!alist)
 			return -ENOMEM;
 		alist->version = uniquifier;
-		call->reply[0] = alist;
+		call->ret_alist = alist;
 
 		if (call->count == 0)
 			goto extract_volendpoints;
@@ -476,13 +475,13 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		afs_extract_to_buf(call, size);
 		call->unmarshall = 2;
 
-		/* Extract fsEndpoints[] entries */
+		/* Fall through - and extract fsEndpoints[] entries */
 	case 2:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
 			return ret;
 
-		alist = call->reply[0];
+		alist = call->ret_alist;
 		bp = call->buffer;
 		switch (call->count2) {
 		case YFS_ENDPOINT_IPV4:
@@ -529,6 +528,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		 * extract the type of the next endpoint when we extract the
 		 * data of the current one, but this is the first...
 		 */
+		/* Fall through */
 	case 3:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -555,7 +555,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		afs_extract_to_buf(call, size);
 		call->unmarshall = 4;
 
-		/* Extract volEndpoints[] entries */
+		/* Fall through - and extract volEndpoints[] entries */
 	case 4:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -591,7 +591,7 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		afs_extract_discard(call, 0);
 		call->unmarshall = 5;
 
-		/* Done */
+		/* Fall through - Done */
 	case 5:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
@@ -602,7 +602,6 @@ static int afs_deliver_yfsvl_get_endpoints(struct afs_call *call)
 		break;
 	}
 
-	alist = call->reply[0];
 	_leave(" = 0 [done]");
 	return 0;
 }
@@ -637,8 +636,8 @@ struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc,
 		return ERR_PTR(-ENOMEM);
 
 	call->key = vc->key;
-	call->reply[0] = NULL;
-	call->ret_reply0 = true;
+	call->ret_alist = NULL;
+	call->max_lifespan = AFS_VL_MAX_LIFESPAN;
 
 	/* Marshall the parameters */
 	bp = call->request;
@@ -647,5 +646,6 @@ struct afs_addr_list *afs_yfsvl_get_endpoints(struct afs_vl_cursor *vc,
 	memcpy(bp, uuid, sizeof(*uuid)); /* Type opr_uuid */
 
 	trace_afs_make_vl_call(call);
-	return (struct afs_addr_list *)afs_make_call(&vc->ac, call, GFP_KERNEL, false);
+	afs_make_call(&vc->ac, call, GFP_KERNEL);
+	return (struct afs_addr_list *)afs_wait_for_call_to_complete(call, &vc->ac);
 }
diff --git a/fs/afs/volume.c b/fs/afs/volume.c
index 00975ed3640f..1a414300b654 100644
--- a/fs/afs/volume.c
+++ b/fs/afs/volume.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* AFS volume management
  *
  * Copyright (C) 2002, 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
@@ -21,7 +17,7 @@ static const char *const afs_voltypes[] = { "R/W", "R/O", "BAK" };
 /*
  * Allocate a volume record and load it up from a vldb record.
  */
-static struct afs_volume *afs_alloc_volume(struct afs_mount_params *params,
+static struct afs_volume *afs_alloc_volume(struct afs_fs_context *params,
 					   struct afs_vldb_entry *vldb,
 					   unsigned long type_mask)
 {
@@ -47,6 +43,7 @@ static struct afs_volume *afs_alloc_volume(struct afs_mount_params *params,
 	atomic_set(&volume->usage, 1);
 	INIT_LIST_HEAD(&volume->proc_link);
 	rwlock_init(&volume->servers_lock);
+	rwlock_init(&volume->cb_v_break_lock);
 	memcpy(volume->name, vldb->name, vldb->name_len + 1);
 
 	slist = afs_alloc_server_list(params->cell, params->key, vldb, type_mask);
@@ -113,7 +110,7 @@ static struct afs_vldb_entry *afs_vl_lookup_vldb(struct afs_cell *cell,
  * - Rule 3: If parent volume is R/W, then only mount R/W volume unless
  *           explicitly told otherwise
  */
-struct afs_volume *afs_create_volume(struct afs_mount_params *params)
+struct afs_volume *afs_create_volume(struct afs_fs_context *params)
 {
 	struct afs_vldb_entry *vldb;
 	struct afs_volume *volume;
diff --git a/fs/afs/write.c b/fs/afs/write.c
index 72efcfcf9f95..cb76566763db 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* handling of writes to regular files and writing back to the server
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/backing-dev.h>
@@ -48,8 +44,7 @@ static int afs_fill_page(struct afs_vnode *vnode, struct key *key,
 		return 0;
 	}
 
-	req = kzalloc(sizeof(struct afs_read) + sizeof(struct page *),
-		      GFP_KERNEL);
+	req = kzalloc(struct_size(req, array, 1), GFP_KERNEL);
 	if (!req)
 		return -ENOMEM;
 
@@ -264,6 +259,7 @@ static void afs_kill_pages(struct address_space *mapping,
 				first = page->index + 1;
 			lock_page(page);
 			generic_error_remove_page(mapping, page);
+			unlock_page(page);
 		}
 
 		__pagevec_release(&pv);
@@ -313,6 +309,46 @@ static void afs_redirty_pages(struct writeback_control *wbc,
 }
 
 /*
+ * completion of write to server
+ */
+static void afs_pages_written_back(struct afs_vnode *vnode,
+				   pgoff_t first, pgoff_t last)
+{
+	struct pagevec pv;
+	unsigned long priv;
+	unsigned count, loop;
+
+	_enter("{%llx:%llu},{%lx-%lx}",
+	       vnode->fid.vid, vnode->fid.vnode, first, last);
+
+	pagevec_init(&pv);
+
+	do {
+		_debug("done %lx-%lx", first, last);
+
+		count = last - first + 1;
+		if (count > PAGEVEC_SIZE)
+			count = PAGEVEC_SIZE;
+		pv.nr = find_get_pages_contig(vnode->vfs_inode.i_mapping,
+					      first, count, pv.pages);
+		ASSERTCMP(pv.nr, ==, count);
+
+		for (loop = 0; loop < count; loop++) {
+			priv = page_private(pv.pages[loop]);
+			trace_afs_page_dirty(vnode, tracepoint_string("clear"),
+					     pv.pages[loop]->index, priv);
+			set_page_private(pv.pages[loop], 0);
+			end_page_writeback(pv.pages[loop]);
+		}
+		first += count;
+		__pagevec_release(&pv);
+	} while (first <= last);
+
+	afs_prune_wb_keys(vnode);
+	_leave("");
+}
+
+/*
  * write to a file
  */
 static int afs_store_data(struct address_space *mapping,
@@ -321,6 +357,7 @@ static int afs_store_data(struct address_space *mapping,
 {
 	struct afs_vnode *vnode = AFS_FS_I(mapping->host);
 	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
 	struct afs_wb_key *wbk = NULL;
 	struct list_head *p;
 	int ret = -ENOKEY, ret2;
@@ -332,6 +369,10 @@ static int afs_store_data(struct address_space *mapping,
 	       vnode->fid.unique,
 	       first, last, offset, to);
 
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS);
+	if (!scb)
+		return -ENOMEM;
+
 	spin_lock(&vnode->wb_lock);
 	p = vnode->wb_keys.next;
 
@@ -350,6 +391,7 @@ try_next_key:
 
 	spin_unlock(&vnode->wb_lock);
 	afs_put_wb_key(wbk);
+	kfree(scb);
 	_leave(" = %d [no keys]", ret);
 	return ret;
 
@@ -360,14 +402,19 @@ found_key:
 	_debug("USE WB KEY %u", key_serial(wbk->key));
 
 	ret = -ERESTARTSYS;
-	if (afs_begin_vnode_operation(&fc, vnode, wbk->key)) {
+	if (afs_begin_vnode_operation(&fc, vnode, wbk->key, false)) {
+		afs_dataversion_t data_version = vnode->status.data_version + 1;
+
 		while (afs_select_fileserver(&fc)) {
 			fc.cb_break = afs_calc_vnode_cb_break(vnode);
-			afs_fs_store_data(&fc, mapping, first, last, offset, to);
+			afs_fs_store_data(&fc, mapping, first, last, offset, to, scb);
 		}
 
-		afs_check_for_remote_deletion(&fc, fc.vnode);
-		afs_vnode_commit_status(&fc, vnode, fc.cb_break);
+		afs_check_for_remote_deletion(&fc, vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break,
+					&data_version, scb);
+		if (fc.ac.error == 0)
+			afs_pages_written_back(vnode, first, last);
 		ret = afs_end_vnode_operation(&fc);
 	}
 
@@ -392,6 +439,7 @@ found_key:
 	}
 
 	afs_put_wb_key(wbk);
+	kfree(scb);
 	_leave(" = %d", ret);
 	return ret;
 }
@@ -678,46 +726,6 @@ int afs_writepages(struct address_space *mapping,
 }
 
 /*
- * completion of write to server
- */
-void afs_pages_written_back(struct afs_vnode *vnode, struct afs_call *call)
-{
-	struct pagevec pv;
-	unsigned long priv;
-	unsigned count, loop;
-	pgoff_t first = call->first, last = call->last;
-
-	_enter("{%llx:%llu},{%lx-%lx}",
-	       vnode->fid.vid, vnode->fid.vnode, first, last);
-
-	pagevec_init(&pv);
-
-	do {
-		_debug("done %lx-%lx", first, last);
-
-		count = last - first + 1;
-		if (count > PAGEVEC_SIZE)
-			count = PAGEVEC_SIZE;
-		pv.nr = find_get_pages_contig(vnode->vfs_inode.i_mapping,
-					      first, count, pv.pages);
-		ASSERTCMP(pv.nr, ==, count);
-
-		for (loop = 0; loop < count; loop++) {
-			priv = page_private(pv.pages[loop]);
-			trace_afs_page_dirty(vnode, tracepoint_string("clear"),
-					     pv.pages[loop]->index, priv);
-			set_page_private(pv.pages[loop], 0);
-			end_page_writeback(pv.pages[loop]);
-		}
-		first += count;
-		__pagevec_release(&pv);
-	} while (first <= last);
-
-	afs_prune_wb_keys(vnode);
-	_leave("");
-}
-
-/*
  * write to an AFS file
  */
 ssize_t afs_file_write(struct kiocb *iocb, struct iov_iter *from)
diff --git a/fs/afs/xattr.c b/fs/afs/xattr.c
index a2cdf25573e2..5552d034090a 100644
--- a/fs/afs/xattr.c
+++ b/fs/afs/xattr.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Extended attribute handling for AFS.  We use xattrs to get and set metadata
  * instead of providing pioctl().
  *
  * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/slab.h>
@@ -16,9 +12,14 @@
 #include "internal.h"
 
 static const char afs_xattr_list[] =
+	"afs.acl\0"
 	"afs.cell\0"
 	"afs.fid\0"
-	"afs.volume";
+	"afs.volume\0"
+	"afs.yfs.acl\0"
+	"afs.yfs.acl_inherited\0"
+	"afs.yfs.acl_num_cleaned\0"
+	"afs.yfs.vol_acl";
 
 /*
  * Retrieve a list of the supported xattrs.
@@ -34,6 +35,300 @@ ssize_t afs_listxattr(struct dentry *dentry, char *buffer, size_t size)
 }
 
 /*
+ * Get a file's ACL.
+ */
+static int afs_xattr_get_acl(const struct xattr_handler *handler,
+			     struct dentry *dentry,
+			     struct inode *inode, const char *name,
+			     void *buffer, size_t size)
+{
+	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
+	struct afs_vnode *vnode = AFS_FS_I(inode);
+	struct afs_acl *acl = NULL;
+	struct key *key;
+	int ret = -ENOMEM;
+
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS);
+	if (!scb)
+		goto error;
+
+	key = afs_request_key(vnode->volume->cell);
+	if (IS_ERR(key)) {
+		ret = PTR_ERR(key);
+		goto error_scb;
+	}
+
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
+		afs_dataversion_t data_version = vnode->status.data_version;
+
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = afs_calc_vnode_cb_break(vnode);
+			acl = afs_fs_fetch_acl(&fc, scb);
+		}
+
+		afs_check_for_remote_deletion(&fc, fc.vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break,
+					&data_version, scb);
+		ret = afs_end_vnode_operation(&fc);
+	}
+
+	if (ret == 0) {
+		ret = acl->size;
+		if (size > 0) {
+			if (acl->size <= size)
+				memcpy(buffer, acl->data, acl->size);
+			else
+				ret = -ERANGE;
+		}
+		kfree(acl);
+	}
+
+	key_put(key);
+error_scb:
+	kfree(scb);
+error:
+	return ret;
+}
+
+/*
+ * Set a file's AFS3 ACL.
+ */
+static int afs_xattr_set_acl(const struct xattr_handler *handler,
+                             struct dentry *dentry,
+                             struct inode *inode, const char *name,
+                             const void *buffer, size_t size, int flags)
+{
+	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
+	struct afs_vnode *vnode = AFS_FS_I(inode);
+	struct afs_acl *acl = NULL;
+	struct key *key;
+	int ret = -ENOMEM;
+
+	if (flags == XATTR_CREATE)
+		return -EINVAL;
+
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS);
+	if (!scb)
+		goto error;
+
+	acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL);
+	if (!acl)
+		goto error_scb;
+
+	key = afs_request_key(vnode->volume->cell);
+	if (IS_ERR(key)) {
+		ret = PTR_ERR(key);
+		goto error_acl;
+	}
+
+	acl->size = size;
+	memcpy(acl->data, buffer, size);
+
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
+		afs_dataversion_t data_version = vnode->status.data_version;
+
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = afs_calc_vnode_cb_break(vnode);
+			afs_fs_store_acl(&fc, acl, scb);
+		}
+
+		afs_check_for_remote_deletion(&fc, fc.vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break,
+					&data_version, scb);
+		ret = afs_end_vnode_operation(&fc);
+	}
+
+	key_put(key);
+error_acl:
+	kfree(acl);
+error_scb:
+	kfree(scb);
+error:
+	return ret;
+}
+
+static const struct xattr_handler afs_xattr_afs_acl_handler = {
+	.name   = "afs.acl",
+	.get    = afs_xattr_get_acl,
+	.set    = afs_xattr_set_acl,
+};
+
+/*
+ * Get a file's YFS ACL.
+ */
+static int afs_xattr_get_yfs(const struct xattr_handler *handler,
+			     struct dentry *dentry,
+			     struct inode *inode, const char *name,
+			     void *buffer, size_t size)
+{
+	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
+	struct afs_vnode *vnode = AFS_FS_I(inode);
+	struct yfs_acl *yacl = NULL;
+	struct key *key;
+	char buf[16], *data;
+	int which = 0, dsize, ret = -ENOMEM;
+
+	if (strcmp(name, "acl") == 0)
+		which = 0;
+	else if (strcmp(name, "acl_inherited") == 0)
+		which = 1;
+	else if (strcmp(name, "acl_num_cleaned") == 0)
+		which = 2;
+	else if (strcmp(name, "vol_acl") == 0)
+		which = 3;
+	else
+		return -EOPNOTSUPP;
+
+	yacl = kzalloc(sizeof(struct yfs_acl), GFP_KERNEL);
+	if (!yacl)
+		goto error;
+
+	if (which == 0)
+		yacl->flags |= YFS_ACL_WANT_ACL;
+	else if (which == 3)
+		yacl->flags |= YFS_ACL_WANT_VOL_ACL;
+
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS);
+	if (!scb)
+		goto error_yacl;
+
+	key = afs_request_key(vnode->volume->cell);
+	if (IS_ERR(key)) {
+		ret = PTR_ERR(key);
+		goto error_scb;
+	}
+
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
+		afs_dataversion_t data_version = vnode->status.data_version;
+
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = afs_calc_vnode_cb_break(vnode);
+			yfs_fs_fetch_opaque_acl(&fc, yacl, scb);
+		}
+
+		afs_check_for_remote_deletion(&fc, fc.vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break,
+					&data_version, scb);
+		ret = afs_end_vnode_operation(&fc);
+	}
+
+	if (ret < 0)
+		goto error_key;
+
+	switch (which) {
+	case 0:
+		data = yacl->acl->data;
+		dsize = yacl->acl->size;
+		break;
+	case 1:
+		data = buf;
+		dsize = snprintf(buf, sizeof(buf), "%u", yacl->inherit_flag);
+		break;
+	case 2:
+		data = buf;
+		dsize = snprintf(buf, sizeof(buf), "%u", yacl->num_cleaned);
+		break;
+	case 3:
+		data = yacl->vol_acl->data;
+		dsize = yacl->vol_acl->size;
+		break;
+	default:
+		ret = -EOPNOTSUPP;
+		goto error_key;
+	}
+
+	ret = dsize;
+	if (size > 0) {
+		if (dsize > size) {
+			ret = -ERANGE;
+			goto error_key;
+		}
+		memcpy(buffer, data, dsize);
+	}
+
+error_key:
+	key_put(key);
+error_scb:
+	kfree(scb);
+error_yacl:
+	yfs_free_opaque_acl(yacl);
+error:
+	return ret;
+}
+
+/*
+ * Set a file's YFS ACL.
+ */
+static int afs_xattr_set_yfs(const struct xattr_handler *handler,
+                             struct dentry *dentry,
+                             struct inode *inode, const char *name,
+                             const void *buffer, size_t size, int flags)
+{
+	struct afs_fs_cursor fc;
+	struct afs_status_cb *scb;
+	struct afs_vnode *vnode = AFS_FS_I(inode);
+	struct afs_acl *acl = NULL;
+	struct key *key;
+	int ret = -ENOMEM;
+
+	if (flags == XATTR_CREATE ||
+	    strcmp(name, "acl") != 0)
+		return -EINVAL;
+
+	scb = kzalloc(sizeof(struct afs_status_cb), GFP_NOFS);
+	if (!scb)
+		goto error;
+
+	acl = kmalloc(sizeof(*acl) + size, GFP_KERNEL);
+	if (!acl)
+		goto error_scb;
+
+	acl->size = size;
+	memcpy(acl->data, buffer, size);
+
+	key = afs_request_key(vnode->volume->cell);
+	if (IS_ERR(key)) {
+		ret = PTR_ERR(key);
+		goto error_acl;
+	}
+
+	ret = -ERESTARTSYS;
+	if (afs_begin_vnode_operation(&fc, vnode, key, true)) {
+		afs_dataversion_t data_version = vnode->status.data_version;
+
+		while (afs_select_fileserver(&fc)) {
+			fc.cb_break = afs_calc_vnode_cb_break(vnode);
+			yfs_fs_store_opaque_acl2(&fc, acl, scb);
+		}
+
+		afs_check_for_remote_deletion(&fc, fc.vnode);
+		afs_vnode_commit_status(&fc, vnode, fc.cb_break,
+					&data_version, scb);
+		ret = afs_end_vnode_operation(&fc);
+	}
+
+error_acl:
+	kfree(acl);
+	key_put(key);
+error_scb:
+	kfree(scb);
+error:
+	return ret;
+}
+
+static const struct xattr_handler afs_xattr_yfs_handler = {
+	.prefix	= "afs.yfs.",
+	.get	= afs_xattr_get_yfs,
+	.set	= afs_xattr_set_yfs,
+};
+
+/*
  * Get the name of the cell on which a file resides.
  */
 static int afs_xattr_get_cell(const struct xattr_handler *handler,
@@ -50,7 +345,7 @@ static int afs_xattr_get_cell(const struct xattr_handler *handler,
 		return namelen;
 	if (namelen > size)
 		return -ERANGE;
-	memcpy(buffer, cell->name, size);
+	memcpy(buffer, cell->name, namelen);
 	return namelen;
 }
 
@@ -69,11 +364,20 @@ static int afs_xattr_get_fid(const struct xattr_handler *handler,
 			     void *buffer, size_t size)
 {
 	struct afs_vnode *vnode = AFS_FS_I(inode);
-	char text[8 + 1 + 8 + 1 + 8 + 1];
+	char text[16 + 1 + 24 + 1 + 8 + 1];
 	size_t len;
 
-	len = sprintf(text, "%llx:%llx:%x",
-		      vnode->fid.vid, vnode->fid.vnode, vnode->fid.unique);
+	/* The volume ID is 64-bit, the vnode ID is 96-bit and the
+	 * uniquifier is 32-bit.
+	 */
+	len = sprintf(text, "%llx:", vnode->fid.vid);
+	if (vnode->fid.vnode_hi)
+		len += sprintf(text + len, "%x%016llx",
+			       vnode->fid.vnode_hi, vnode->fid.vnode);
+	else
+		len += sprintf(text + len, "%llx", vnode->fid.vnode);
+	len += sprintf(text + len, ":%x", vnode->fid.unique);
+
 	if (size == 0)
 		return len;
 	if (len > size)
@@ -104,7 +408,7 @@ static int afs_xattr_get_volume(const struct xattr_handler *handler,
 		return namelen;
 	if (namelen > size)
 		return -ERANGE;
-	memcpy(buffer, volname, size);
+	memcpy(buffer, volname, namelen);
 	return namelen;
 }
 
@@ -114,8 +418,10 @@ static const struct xattr_handler afs_xattr_afs_volume_handler = {
 };
 
 const struct xattr_handler *afs_xattr_handlers[] = {
+	&afs_xattr_afs_acl_handler,
 	&afs_xattr_afs_cell_handler,
 	&afs_xattr_afs_fid_handler,
 	&afs_xattr_afs_volume_handler,
+	&afs_xattr_yfs_handler,		/* afs.yfs. prefix */
 	NULL
 };
diff --git a/fs/afs/xdr_fs.h b/fs/afs/xdr_fs.h
index aa21f3068d52..94f1f398eefa 100644
--- a/fs/afs/xdr_fs.h
+++ b/fs/afs/xdr_fs.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* AFS fileserver XDR types
  *
  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #ifndef XDR_FS_H
diff --git a/fs/afs/yfsclient.c b/fs/afs/yfsclient.c
index 5aa57929e8c2..18722aaeda33 100644
--- a/fs/afs/yfsclient.c
+++ b/fs/afs/yfsclient.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* YFS File Server client stubs
  *
  * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/init.h>
@@ -183,24 +179,19 @@ static void xdr_dump_bad(const __be32 *bp)
 /*
  * Decode a YFSFetchStatus block
  */
-static int xdr_decode_YFSFetchStatus(struct afs_call *call,
-				     const __be32 **_bp,
-				     struct afs_file_status *status,
-				     struct afs_vnode *vnode,
-				     const afs_dataversion_t *expected_version,
-				     struct afs_read *read_req)
+static int xdr_decode_YFSFetchStatus(const __be32 **_bp,
+				     struct afs_call *call,
+				     struct afs_status_cb *scb)
 {
 	const struct yfs_xdr_YFSFetchStatus *xdr = (const void *)*_bp;
+	struct afs_file_status *status = &scb->status;
 	u32 type;
-	u8 flags = 0;
 
 	status->abort_code = ntohl(xdr->abort_code);
 	if (status->abort_code != 0) {
-		if (vnode && status->abort_code == VNOVNODE) {
-			set_bit(AFS_VNODE_DELETED, &vnode->flags);
+		if (status->abort_code == VNOVNODE)
 			status->nlink = 0;
-			__afs_break_callback(vnode);
-		}
+		scb->have_error = true;
 		return 0;
 	}
 
@@ -209,77 +200,28 @@ static int xdr_decode_YFSFetchStatus(struct afs_call *call,
 	case AFS_FTYPE_FILE:
 	case AFS_FTYPE_DIR:
 	case AFS_FTYPE_SYMLINK:
-		if (type != status->type &&
-		    vnode &&
-		    !test_bit(AFS_VNODE_UNSET, &vnode->flags)) {
-			pr_warning("Vnode %llx:%llx:%x changed type %u to %u\n",
-				   vnode->fid.vid,
-				   vnode->fid.vnode,
-				   vnode->fid.unique,
-				   status->type, type);
-			goto bad;
-		}
 		status->type = type;
 		break;
 	default:
 		goto bad;
 	}
 
-#define EXTRACT_M4(FIELD)					\
-	do {							\
-		u32 x = ntohl(xdr->FIELD);			\
-		if (status->FIELD != x) {			\
-			flags |= AFS_VNODE_META_CHANGED;	\
-			status->FIELD = x;			\
-		}						\
-	} while (0)
-
-#define EXTRACT_M8(FIELD)					\
-	do {							\
-		u64 x = xdr_to_u64(xdr->FIELD);			\
-		if (status->FIELD != x) {			\
-			flags |= AFS_VNODE_META_CHANGED;	\
-			status->FIELD = x;			\
-		}						\
-	} while (0)
-
-#define EXTRACT_D8(FIELD)					\
-	do {							\
-		u64 x = xdr_to_u64(xdr->FIELD);			\
-		if (status->FIELD != x) {			\
-			flags |= AFS_VNODE_DATA_CHANGED;	\
-			status->FIELD = x;			\
-		}						\
-	} while (0)
-
-	EXTRACT_M4(nlink);
-	EXTRACT_D8(size);
-	EXTRACT_D8(data_version);
-	EXTRACT_M8(author);
-	EXTRACT_M8(owner);
-	EXTRACT_M8(group);
-	EXTRACT_M4(mode);
-	EXTRACT_M4(caller_access); /* call ticket dependent */
-	EXTRACT_M4(anon_access);
-
-	status->mtime_client = xdr_to_time(xdr->mtime_client);
-	status->mtime_server = xdr_to_time(xdr->mtime_server);
-	status->lock_count   = ntohl(xdr->lock_count);
-
-	if (read_req) {
-		read_req->data_version = status->data_version;
-		read_req->file_size = status->size;
-	}
+	status->nlink		= ntohl(xdr->nlink);
+	status->author		= xdr_to_u64(xdr->author);
+	status->owner		= xdr_to_u64(xdr->owner);
+	status->caller_access	= ntohl(xdr->caller_access); /* Ticket dependent */
+	status->anon_access	= ntohl(xdr->anon_access);
+	status->mode		= ntohl(xdr->mode) & S_IALLUGO;
+	status->group		= xdr_to_u64(xdr->group);
+	status->lock_count	= ntohl(xdr->lock_count);
+
+	status->mtime_client	= xdr_to_time(xdr->mtime_client);
+	status->mtime_server	= xdr_to_time(xdr->mtime_server);
+	status->size		= xdr_to_u64(xdr->size);
+	status->data_version	= xdr_to_u64(xdr->data_version);
+	scb->have_status	= true;
 
 	*_bp += xdr_size(xdr);
-
-	if (vnode) {
-		if (test_bit(AFS_VNODE_UNSET, &vnode->flags))
-			flags |= AFS_VNODE_NOT_YET_SET;
-		afs_update_inode_from_status(vnode, status, expected_version,
-					     flags);
-	}
-
 	return 0;
 
 bad:
@@ -288,73 +230,20 @@ bad:
 }
 
 /*
- * Decode the file status.  We need to lock the target vnode if we're going to
- * update its status so that stat() sees the attributes update atomically.
- */
-static int yfs_decode_status(struct afs_call *call,
-			     const __be32 **_bp,
-			     struct afs_file_status *status,
-			     struct afs_vnode *vnode,
-			     const afs_dataversion_t *expected_version,
-			     struct afs_read *read_req)
-{
-	int ret;
-
-	if (!vnode)
-		return xdr_decode_YFSFetchStatus(call, _bp, status, vnode,
-						 expected_version, read_req);
-
-	write_seqlock(&vnode->cb_lock);
-	ret = xdr_decode_YFSFetchStatus(call, _bp, status, vnode,
-					expected_version, read_req);
-	write_sequnlock(&vnode->cb_lock);
-	return ret;
-}
-
-/*
  * Decode a YFSCallBack block
  */
-static void xdr_decode_YFSCallBack(struct afs_call *call,
-				   struct afs_vnode *vnode,
-				   const __be32 **_bp)
-{
-	struct yfs_xdr_YFSCallBack *xdr = (void *)*_bp;
-	struct afs_cb_interest *old, *cbi = call->cbi;
-	u64 cb_expiry;
-
-	write_seqlock(&vnode->cb_lock);
-
-	if (!afs_cb_is_broken(call->cb_break, vnode, cbi)) {
-		cb_expiry = xdr_to_u64(xdr->expiration_time);
-		do_div(cb_expiry, 10 * 1000 * 1000);
-		vnode->cb_version	= ntohl(xdr->version);
-		vnode->cb_type		= ntohl(xdr->type);
-		vnode->cb_expires_at	= cb_expiry + ktime_get_real_seconds();
-		old = vnode->cb_interest;
-		if (old != call->cbi) {
-			vnode->cb_interest = cbi;
-			cbi = old;
-		}
-		set_bit(AFS_VNODE_CB_PROMISED, &vnode->flags);
-	}
-
-	write_sequnlock(&vnode->cb_lock);
-	call->cbi = cbi;
-	*_bp += xdr_size(xdr);
-}
-
-static void xdr_decode_YFSCallBack_raw(const __be32 **_bp,
-				       struct afs_callback *cb)
+static void xdr_decode_YFSCallBack(const __be32 **_bp,
+				   struct afs_call *call,
+				   struct afs_status_cb *scb)
 {
 	struct yfs_xdr_YFSCallBack *x = (void *)*_bp;
-	u64 cb_expiry;
-
-	cb_expiry = xdr_to_u64(x->expiration_time);
-	do_div(cb_expiry, 10 * 1000 * 1000);
-	cb->version	= ntohl(x->version);
-	cb->type	= ntohl(x->type);
-	cb->expires_at	= cb_expiry + ktime_get_real_seconds();
+	struct afs_callback *cb = &scb->callback;
+	ktime_t cb_expiry;
 
+	cb_expiry = call->reply_time;
+	cb_expiry = ktime_add(cb_expiry, xdr_to_u64(x->expiration_time) * 100);
+	cb->expires_at	= ktime_divns(cb_expiry, NSEC_PER_SEC);
+	scb->have_cb	= true;
 	*_bp += xdr_size(x);
 }
 
@@ -442,11 +331,10 @@ static void xdr_decode_YFSFetchVolumeStatus(const __be32 **_bp,
 }
 
 /*
- * deliver reply data to an FS.FetchStatus
+ * Deliver a reply that's a status, callback and volsync.
  */
-static int yfs_deliver_fs_fetch_status_vnode(struct afs_call *call)
+static int yfs_deliver_fs_status_cb_and_volsync(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
@@ -454,16 +342,36 @@ static int yfs_deliver_fs_fetch_status_vnode(struct afs_call *call)
 	if (ret < 0)
 		return ret;
 
-	_enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
-
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
+	if (ret < 0)
+		return ret;
+	xdr_decode_YFSCallBack(&bp, call, call->out_scb);
+	xdr_decode_YFSVolSync(&bp, call->out_volsync);
+
+	_leave(" = 0 [done]");
+	return 0;
+}
+
+/*
+ * Deliver reply data to operations that just return a file status and a volume
+ * sync record.
+ */
+static int yfs_deliver_status_and_volsync(struct afs_call *call)
+{
+	const __be32 *bp;
+	int ret;
+
+	ret = afs_transfer_reply(call);
+	if (ret < 0)
+		return ret;
+
+	bp = call->buffer;
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	xdr_decode_YFSCallBack(call, vnode, &bp);
-	xdr_decode_YFSVolSync(&bp, call->reply[1]);
+	xdr_decode_YFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -475,15 +383,15 @@ static int yfs_deliver_fs_fetch_status_vnode(struct afs_call *call)
 static const struct afs_call_type yfs_RXYFSFetchStatus_vnode = {
 	.name		= "YFS.FetchStatus(vnode)",
 	.op		= yfs_FS_FetchStatus,
-	.deliver	= yfs_deliver_fs_fetch_status_vnode,
+	.deliver	= yfs_deliver_fs_status_cb_and_volsync,
 	.destructor	= afs_flat_call_destructor,
 };
 
 /*
  * Fetch the status information for a file.
  */
-int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsync,
-			     bool new_inode)
+int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
+			     struct afs_volsync *volsync)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -505,9 +413,8 @@ int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
 	}
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = volsync;
-	call->expected_version = new_inode ? 1 : vnode->status.data_version;
+	call->out_scb = scb;
+	call->out_volsync = volsync;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -516,10 +423,11 @@ int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
 	bp = xdr_encode_YFSFid(bp, &vnode->fid);
 	yfs_check_req(call, bp);
 
-	call->cb_break = fc->cb_break;
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -527,8 +435,7 @@ int yfs_fs_fetch_file_status(struct afs_fs_cursor *fc, struct afs_volsync *volsy
  */
 static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
-	struct afs_read *req = call->reply[2];
+	struct afs_read *req = call->read_request;
 	const __be32 *bp;
 	unsigned int size;
 	int ret;
@@ -544,7 +451,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		afs_extract_to_tmp64(call);
 		call->unmarshall++;
 
-		/* extract the returned data length */
+		/* Fall through - and extract the returned data length */
 	case 1:
 		_debug("extract data length");
 		ret = afs_extract_data(call, true);
@@ -571,7 +478,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		iov_iter_bvec(&call->iter, READ, call->bvec, 1, size);
 		ASSERTCMP(size, <=, PAGE_SIZE);
 
-		/* extract the returned data */
+		/* Fall through - and extract the returned data */
 	case 2:
 		_debug("extract data %zu/%llu",
 		       iov_iter_count(&call->iter), req->remain);
@@ -585,7 +492,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		if (req->offset == PAGE_SIZE) {
 			req->offset = 0;
 			if (req->page_done)
-				req->page_done(call, req);
+				req->page_done(req);
 			req->index++;
 			if (req->remain > 0)
 				goto begin_page;
@@ -598,6 +505,8 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 		/* Discard any excess data the server gave us */
 		iov_iter_discard(&call->iter, READ, req->actual_len - req->len);
 		call->unmarshall = 3;
+
+		/* Fall through */
 	case 3:
 		_debug("extract discard %zu/%llu",
 		       iov_iter_count(&call->iter), req->actual_len - req->len);
@@ -613,22 +522,25 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 				   sizeof(struct yfs_xdr_YFSCallBack) +
 				   sizeof(struct yfs_xdr_YFSVolSync));
 
-		/* extract the metadata */
+		/* Fall through - and extract the metadata */
 	case 4:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
 			return ret;
 
 		bp = call->buffer;
-		ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
-					&vnode->status.data_version, req);
+		ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
 		if (ret < 0)
 			return ret;
-		xdr_decode_YFSCallBack(call, vnode, &bp);
-		xdr_decode_YFSVolSync(&bp, call->reply[1]);
+		xdr_decode_YFSCallBack(&bp, call, call->out_scb);
+		xdr_decode_YFSVolSync(&bp, call->out_volsync);
+
+		req->data_version = call->out_scb->status.data_version;
+		req->file_size = call->out_scb->status.size;
 
 		call->unmarshall++;
 
+		/* Fall through */
 	case 5:
 		break;
 	}
@@ -638,7 +550,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 			zero_user_segment(req->pages[req->index],
 					  req->offset, PAGE_SIZE);
 		if (req->page_done)
-			req->page_done(call, req);
+			req->page_done(req);
 		req->offset = 0;
 	}
 
@@ -648,9 +560,7 @@ static int yfs_deliver_fs_fetch_data64(struct afs_call *call)
 
 static void yfs_fetch_data_destructor(struct afs_call *call)
 {
-	struct afs_read *req = call->reply[2];
-
-	afs_put_read(req);
+	afs_put_read(call->read_request);
 	afs_flat_call_destructor(call);
 }
 
@@ -667,7 +577,8 @@ static const struct afs_call_type yfs_RXYFSFetchData64 = {
 /*
  * Fetch data from a file.
  */
-int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
+int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_status_cb *scb,
+		      struct afs_read *req)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -689,11 +600,9 @@ int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = NULL; /* volsync */
-	call->reply[2] = req;
-	call->expected_version = vnode->status.data_version;
-	call->want_reply_time = true;
+	call->out_scb = scb;
+	call->out_volsync = NULL;
+	call->read_request = req;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -705,10 +614,11 @@ int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
 	yfs_check_req(call, bp);
 
 	refcount_inc(&req->usage);
-	call->cb_break = fc->cb_break;
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -716,7 +626,6 @@ int yfs_fs_fetch_data(struct afs_fs_cursor *fc, struct afs_read *req)
  */
 static int yfs_deliver_fs_create_vnode(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
@@ -728,16 +637,15 @@ static int yfs_deliver_fs_create_vnode(struct afs_call *call)
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	xdr_decode_YFSFid(&bp, call->reply[1]);
-	ret = yfs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL);
+	xdr_decode_YFSFid(&bp, call->out_fid);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
-	xdr_decode_YFSCallBack_raw(&bp, call->reply[3]);
-	xdr_decode_YFSVolSync(&bp, NULL);
+	xdr_decode_YFSCallBack(&bp, call, call->out_scb);
+	xdr_decode_YFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -759,14 +667,13 @@ static const struct afs_call_type afs_RXFSCreateFile = {
 int yfs_fs_create_file(struct afs_fs_cursor *fc,
 		       const char *name,
 		       umode_t mode,
-		       u64 current_data_version,
+		       struct afs_status_cb *dvnode_scb,
 		       struct afs_fid *newfid,
-		       struct afs_file_status *newstatus,
-		       struct afs_callback *newcb)
+		       struct afs_status_cb *new_scb)
 {
-	struct afs_vnode *vnode = fc->vnode;
+	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
-	struct afs_net *net = afs_v2net(vnode);
+	struct afs_net *net = afs_v2net(dvnode);
 	size_t namesz, reqsz, rplsz;
 	__be32 *bp;
 
@@ -790,25 +697,25 @@ int yfs_fs_create_file(struct afs_fs_cursor *fc,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = newfid;
-	call->reply[2] = newstatus;
-	call->reply[3] = newcb;
-	call->expected_version = current_data_version + 1;
+	call->out_dir_scb = dvnode_scb;
+	call->out_fid = newfid;
+	call->out_scb = new_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
 	bp = xdr_encode_u32(bp, YFSCREATEFILE);
 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
-	bp = xdr_encode_YFSFid(bp, &vnode->fid);
+	bp = xdr_encode_YFSFid(bp, &dvnode->fid);
 	bp = xdr_encode_string(bp, name, namesz);
 	bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
 	bp = xdr_encode_u32(bp, yfs_LockNone); /* ViceLockType */
 	yfs_check_req(call, bp);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &dvnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 static const struct afs_call_type yfs_RXFSMakeDir = {
@@ -824,14 +731,13 @@ static const struct afs_call_type yfs_RXFSMakeDir = {
 int yfs_fs_make_dir(struct afs_fs_cursor *fc,
 		    const char *name,
 		    umode_t mode,
-		    u64 current_data_version,
+		    struct afs_status_cb *dvnode_scb,
 		    struct afs_fid *newfid,
-		    struct afs_file_status *newstatus,
-		    struct afs_callback *newcb)
+		    struct afs_status_cb *new_scb)
 {
-	struct afs_vnode *vnode = fc->vnode;
+	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
-	struct afs_net *net = afs_v2net(vnode);
+	struct afs_net *net = afs_v2net(dvnode);
 	size_t namesz, reqsz, rplsz;
 	__be32 *bp;
 
@@ -854,24 +760,24 @@ int yfs_fs_make_dir(struct afs_fs_cursor *fc,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = newfid;
-	call->reply[2] = newstatus;
-	call->reply[3] = newcb;
-	call->expected_version = current_data_version + 1;
+	call->out_dir_scb = dvnode_scb;
+	call->out_fid = newfid;
+	call->out_scb = new_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
 	bp = xdr_encode_u32(bp, YFSMAKEDIR);
 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
-	bp = xdr_encode_YFSFid(bp, &vnode->fid);
+	bp = xdr_encode_YFSFid(bp, &dvnode->fid);
 	bp = xdr_encode_string(bp, name, namesz);
 	bp = xdr_encode_YFSStoreStatus_mode(bp, mode);
 	yfs_check_req(call, bp);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &dvnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -879,8 +785,6 @@ int yfs_fs_make_dir(struct afs_fs_cursor *fc,
  */
 static int yfs_deliver_fs_remove_file2(struct afs_call *call)
 {
-	struct afs_vnode *dvnode = call->reply[0];
-	struct afs_vnode *vnode = call->reply[1];
 	struct afs_fid fid;
 	const __be32 *bp;
 	int ret;
@@ -891,20 +795,18 @@ static int yfs_deliver_fs_remove_file2(struct afs_call *call)
 	if (ret < 0)
 		return ret;
 
-	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = yfs_decode_status(call, &bp, &dvnode->status, dvnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
 
 	xdr_decode_YFSFid(&bp, &fid);
-	ret = yfs_decode_status(call, &bp, &vnode->status, vnode, NULL, NULL);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
 	/* Was deleted if vnode->status.abort_code == VNOVNODE. */
 
-	xdr_decode_YFSVolSync(&bp, NULL);
+	xdr_decode_YFSVolSync(&bp, call->out_volsync);
 	return 0;
 }
 
@@ -922,7 +824,8 @@ static const struct afs_call_type yfs_RXYFSRemoveFile2 = {
  * Remove a file and retrieve new file status.
  */
 int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
-			const char *name, u64 current_data_version)
+			const char *name, struct afs_status_cb *dvnode_scb,
+			struct afs_status_cb *vnode_scb)
 {
 	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
@@ -947,9 +850,8 @@ int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = dvnode;
-	call->reply[1] = vnode;
-	call->expected_version = current_data_version + 1;
+	call->out_dir_scb = dvnode_scb;
+	call->out_scb = vnode_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -960,8 +862,10 @@ int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 	yfs_check_req(call, bp);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &dvnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &dvnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -969,7 +873,6 @@ int yfs_fs_remove_file2(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
  */
 static int yfs_deliver_fs_remove(struct afs_call *call)
 {
-	struct afs_vnode *dvnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
@@ -979,14 +882,12 @@ static int yfs_deliver_fs_remove(struct afs_call *call)
 	if (ret < 0)
 		return ret;
 
-	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = yfs_decode_status(call, &bp, &dvnode->status, dvnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
 
-	xdr_decode_YFSVolSync(&bp, NULL);
+	xdr_decode_YFSVolSync(&bp, call->out_volsync);
 	return 0;
 }
 
@@ -1011,7 +912,8 @@ static const struct afs_call_type yfs_RXYFSRemoveDir = {
  * remove a file or directory
  */
 int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
-		  const char *name, bool isdir, u64 current_data_version)
+		  const char *name, bool isdir,
+		  struct afs_status_cb *dvnode_scb)
 {
 	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
@@ -1034,9 +936,7 @@ int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = dvnode;
-	call->reply[1] = vnode;
-	call->expected_version = current_data_version + 1;
+	call->out_dir_scb = dvnode_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1047,8 +947,10 @@ int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 	yfs_check_req(call, bp);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &dvnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &dvnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1056,7 +958,6 @@ int yfs_fs_remove(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
  */
 static int yfs_deliver_fs_link(struct afs_call *call)
 {
-	struct afs_vnode *dvnode = call->reply[0], *vnode = call->reply[1];
 	const __be32 *bp;
 	int ret;
 
@@ -1066,16 +967,14 @@ static int yfs_deliver_fs_link(struct afs_call *call)
 	if (ret < 0)
 		return ret;
 
-	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = yfs_decode_status(call, &bp, &vnode->status, vnode, NULL, NULL);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	ret = yfs_decode_status(call, &bp, &dvnode->status, dvnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
-	xdr_decode_YFSVolSync(&bp, NULL);
+	xdr_decode_YFSVolSync(&bp, call->out_volsync);
 	_leave(" = 0 [done]");
 	return 0;
 }
@@ -1094,7 +993,9 @@ static const struct afs_call_type yfs_RXYFSLink = {
  * Make a hard link.
  */
 int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
-		const char *name, u64 current_data_version)
+		const char *name,
+		struct afs_status_cb *dvnode_scb,
+		struct afs_status_cb *vnode_scb)
 {
 	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
@@ -1118,9 +1019,8 @@ int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = dvnode;
-	call->reply[1] = vnode;
-	call->expected_version = current_data_version + 1;
+	call->out_dir_scb = dvnode_scb;
+	call->out_scb = vnode_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1132,8 +1032,10 @@ int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
 	yfs_check_req(call, bp);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &vnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1141,7 +1043,6 @@ int yfs_fs_link(struct afs_fs_cursor *fc, struct afs_vnode *vnode,
  */
 static int yfs_deliver_fs_symlink(struct afs_call *call)
 {
-	struct afs_vnode *vnode = call->reply[0];
 	const __be32 *bp;
 	int ret;
 
@@ -1153,15 +1054,14 @@ static int yfs_deliver_fs_symlink(struct afs_call *call)
 
 	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	xdr_decode_YFSFid(&bp, call->reply[1]);
-	ret = yfs_decode_status(call, &bp, call->reply[2], NULL, NULL, NULL);
+	xdr_decode_YFSFid(&bp, call->out_fid);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
 	if (ret < 0)
 		return ret;
-	ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
-	xdr_decode_YFSVolSync(&bp, NULL);
+	xdr_decode_YFSVolSync(&bp, call->out_volsync);
 
 	_leave(" = 0 [done]");
 	return 0;
@@ -1183,9 +1083,9 @@ static const struct afs_call_type yfs_RXYFSSymlink = {
 int yfs_fs_symlink(struct afs_fs_cursor *fc,
 		   const char *name,
 		   const char *contents,
-		   u64 current_data_version,
+		   struct afs_status_cb *dvnode_scb,
 		   struct afs_fid *newfid,
-		   struct afs_file_status *newstatus)
+		   struct afs_status_cb *vnode_scb)
 {
 	struct afs_vnode *dvnode = fc->vnode;
 	struct afs_call *call;
@@ -1212,10 +1112,9 @@ int yfs_fs_symlink(struct afs_fs_cursor *fc,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = dvnode;
-	call->reply[1] = newfid;
-	call->reply[2] = newstatus;
-	call->expected_version = current_data_version + 1;
+	call->out_dir_scb = dvnode_scb;
+	call->out_fid = newfid;
+	call->out_scb = vnode_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1228,8 +1127,10 @@ int yfs_fs_symlink(struct afs_fs_cursor *fc,
 	yfs_check_req(call, bp);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &dvnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_call1(call, &dvnode->fid, name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1237,8 +1138,6 @@ int yfs_fs_symlink(struct afs_fs_cursor *fc,
  */
 static int yfs_deliver_fs_rename(struct afs_call *call)
 {
-	struct afs_vnode *orig_dvnode = call->reply[0];
-	struct afs_vnode *new_dvnode = call->reply[1];
 	const __be32 *bp;
 	int ret;
 
@@ -1248,20 +1147,17 @@ static int yfs_deliver_fs_rename(struct afs_call *call)
 	if (ret < 0)
 		return ret;
 
-	/* unmarshall the reply once we've received all of it */
 	bp = call->buffer;
-	ret = yfs_decode_status(call, &bp, &orig_dvnode->status, orig_dvnode,
-				&call->expected_version, NULL);
+	ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_dir_scb);
 	if (ret < 0)
 		return ret;
-	if (new_dvnode != orig_dvnode) {
-		ret = yfs_decode_status(call, &bp, &new_dvnode->status, new_dvnode,
-					&call->expected_version_2, NULL);
+	if (call->out_dir_scb != call->out_scb) {
+		ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
 		if (ret < 0)
 			return ret;
 	}
 
-	xdr_decode_YFSVolSync(&bp, NULL);
+	xdr_decode_YFSVolSync(&bp, call->out_volsync);
 	_leave(" = 0 [done]");
 	return 0;
 }
@@ -1283,8 +1179,8 @@ int yfs_fs_rename(struct afs_fs_cursor *fc,
 		  const char *orig_name,
 		  struct afs_vnode *new_dvnode,
 		  const char *new_name,
-		  u64 current_orig_data_version,
-		  u64 current_new_data_version)
+		  struct afs_status_cb *orig_dvnode_scb,
+		  struct afs_status_cb *new_dvnode_scb)
 {
 	struct afs_vnode *orig_dvnode = fc->vnode;
 	struct afs_call *call;
@@ -1310,10 +1206,8 @@ int yfs_fs_rename(struct afs_fs_cursor *fc,
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = orig_dvnode;
-	call->reply[1] = new_dvnode;
-	call->expected_version = current_orig_data_version + 1;
-	call->expected_version_2 = current_new_data_version + 1;
+	call->out_dir_scb = orig_dvnode_scb;
+	call->out_scb = new_dvnode_scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1326,37 +1220,10 @@ int yfs_fs_rename(struct afs_fs_cursor *fc,
 	yfs_check_req(call, bp);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &orig_dvnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
-}
-
-/*
- * Deliver reply data to a YFS.StoreData64 operation.
- */
-static int yfs_deliver_fs_store_data(struct afs_call *call)
-{
-	struct afs_vnode *vnode = call->reply[0];
-	const __be32 *bp;
-	int ret;
-
-	_enter("");
-
-	ret = afs_transfer_reply(call);
-	if (ret < 0)
-		return ret;
-
-	/* unmarshall the reply once we've received all of it */
-	bp = call->buffer;
-	ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
-	if (ret < 0)
-		return ret;
-	xdr_decode_YFSVolSync(&bp, NULL);
-
-	afs_pages_written_back(vnode, call);
-
-	_leave(" = 0 [done]");
-	return 0;
+	trace_afs_make_fs_call2(call, &orig_dvnode->fid, orig_name, new_name);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1365,7 +1232,7 @@ static int yfs_deliver_fs_store_data(struct afs_call *call)
 static const struct afs_call_type yfs_RXYFSStoreData64 = {
 	.name		= "YFS.StoreData64",
 	.op		= yfs_FS_StoreData64,
-	.deliver	= yfs_deliver_fs_store_data,
+	.deliver	= yfs_deliver_status_and_volsync,
 	.destructor	= afs_flat_call_destructor,
 };
 
@@ -1374,7 +1241,8 @@ static const struct afs_call_type yfs_RXYFSStoreData64 = {
  */
 int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
 		      pgoff_t first, pgoff_t last,
-		      unsigned offset, unsigned to)
+		      unsigned offset, unsigned to,
+		      struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1412,13 +1280,12 @@ int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
 
 	call->key = fc->key;
 	call->mapping = mapping;
-	call->reply[0] = vnode;
 	call->first = first;
 	call->last = last;
 	call->first_offset = offset;
 	call->last_to = to;
 	call->send_pages = true;
-	call->expected_version = vnode->status.data_version + 1;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1433,34 +1300,9 @@ int yfs_fs_store_data(struct afs_fs_cursor *fc, struct address_space *mapping,
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
-}
-
-/*
- * deliver reply data to an FS.StoreStatus
- */
-static int yfs_deliver_fs_store_status(struct afs_call *call)
-{
-	struct afs_vnode *vnode = call->reply[0];
-	const __be32 *bp;
-	int ret;
-
-	_enter("");
-
-	ret = afs_transfer_reply(call);
-	if (ret < 0)
-		return ret;
-
-	/* unmarshall the reply once we've received all of it */
-	bp = call->buffer;
-	ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
-	if (ret < 0)
-		return ret;
-	xdr_decode_YFSVolSync(&bp, NULL);
-
-	_leave(" = 0 [done]");
-	return 0;
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1469,14 +1311,14 @@ static int yfs_deliver_fs_store_status(struct afs_call *call)
 static const struct afs_call_type yfs_RXYFSStoreStatus = {
 	.name		= "YFS.StoreStatus",
 	.op		= yfs_FS_StoreStatus,
-	.deliver	= yfs_deliver_fs_store_status,
+	.deliver	= yfs_deliver_status_and_volsync,
 	.destructor	= afs_flat_call_destructor,
 };
 
 static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
 	.name		= "YFS.StoreData64",
 	.op		= yfs_FS_StoreData64,
-	.deliver	= yfs_deliver_fs_store_status,
+	.deliver	= yfs_deliver_status_and_volsync,
 	.destructor	= afs_flat_call_destructor,
 };
 
@@ -1484,7 +1326,8 @@ static const struct afs_call_type yfs_RXYFSStoreData64_as_Status = {
  * Set the attributes on a file, using YFS.StoreData64 rather than
  * YFS.StoreStatus so as to alter the file size also.
  */
-static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
+static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr,
+			       struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1505,8 +1348,7 @@ static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->expected_version = vnode->status.data_version + 1;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1514,21 +1356,24 @@ static int yfs_fs_setattr_size(struct afs_fs_cursor *fc, struct iattr *attr)
 	bp = xdr_encode_u32(bp, 0); /* RPC flags */
 	bp = xdr_encode_YFSFid(bp, &vnode->fid);
 	bp = xdr_encode_YFS_StoreStatus(bp, attr);
-	bp = xdr_encode_u64(bp, 0);		/* position of start of write */
+	bp = xdr_encode_u64(bp, attr->ia_size);	/* position of start of write */
 	bp = xdr_encode_u64(bp, 0);		/* size of write */
 	bp = xdr_encode_u64(bp, attr->ia_size);	/* new file length */
 	yfs_check_req(call, bp);
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
  * Set the attributes on a file, using YFS.StoreData64 if there's a change in
  * file size, and YFS.StoreStatus otherwise.
  */
-int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
+int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr,
+		   struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1536,7 +1381,7 @@ int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
 	__be32 *bp;
 
 	if (attr->ia_valid & ATTR_SIZE)
-		return yfs_fs_setattr_size(fc, attr);
+		return yfs_fs_setattr_size(fc, attr, scb);
 
 	_enter(",%x,{%llx:%llu},,",
 	       key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
@@ -1551,8 +1396,7 @@ int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->expected_version = vnode->status.data_version;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1564,7 +1408,9 @@ int yfs_fs_setattr(struct afs_fs_cursor *fc, struct iattr *attr)
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1584,7 +1430,7 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 		call->unmarshall++;
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchVolumeStatus));
 
-		/* extract the returned status record */
+		/* Fall through - and extract the returned status record */
 	case 1:
 		_debug("extract status");
 		ret = afs_extract_data(call, true);
@@ -1592,11 +1438,11 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 			return ret;
 
 		bp = call->buffer;
-		xdr_decode_YFSFetchVolumeStatus(&bp, call->reply[1]);
+		xdr_decode_YFSFetchVolumeStatus(&bp, call->out_volstatus);
 		call->unmarshall++;
 		afs_extract_to_tmp(call);
 
-		/* extract the volume name length */
+		/* Fall through - and extract the volume name length */
 	case 2:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1608,23 +1454,23 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 			return afs_protocol_error(call, -EBADMSG,
 						  afs_eproto_volname_len);
 		size = (call->count + 3) & ~3; /* It's padded */
-		afs_extract_begin(call, call->reply[2], size);
+		afs_extract_to_buf(call, size);
 		call->unmarshall++;
 
-		/* extract the volume name */
+		/* Fall through - and extract the volume name */
 	case 3:
 		_debug("extract volname");
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
 			return ret;
 
-		p = call->reply[2];
+		p = call->buffer;
 		p[call->count] = 0;
 		_debug("volname '%s'", p);
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* extract the offline message length */
+		/* Fall through - and extract the offline message length */
 	case 4:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1636,24 +1482,24 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 			return afs_protocol_error(call, -EBADMSG,
 						  afs_eproto_offline_msg_len);
 		size = (call->count + 3) & ~3; /* It's padded */
-		afs_extract_begin(call, call->reply[2], size);
+		afs_extract_to_buf(call, size);
 		call->unmarshall++;
 
-		/* extract the offline message */
+		/* Fall through - and extract the offline message */
 	case 5:
 		_debug("extract offline");
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
 			return ret;
 
-		p = call->reply[2];
+		p = call->buffer;
 		p[call->count] = 0;
 		_debug("offline '%s'", p);
 
 		afs_extract_to_tmp(call);
 		call->unmarshall++;
 
-		/* extract the message of the day length */
+		/* Fall through - and extract the message of the day length */
 	case 6:
 		ret = afs_extract_data(call, true);
 		if (ret < 0)
@@ -1665,22 +1511,23 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 			return afs_protocol_error(call, -EBADMSG,
 						  afs_eproto_motd_len);
 		size = (call->count + 3) & ~3; /* It's padded */
-		afs_extract_begin(call, call->reply[2], size);
+		afs_extract_to_buf(call, size);
 		call->unmarshall++;
 
-		/* extract the message of the day */
+		/* Fall through - and extract the message of the day */
 	case 7:
 		_debug("extract motd");
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
 			return ret;
 
-		p = call->reply[2];
+		p = call->buffer;
 		p[call->count] = 0;
 		_debug("motd '%s'", p);
 
 		call->unmarshall++;
 
+		/* Fall through */
 	case 8:
 		break;
 	}
@@ -1690,23 +1537,13 @@ static int yfs_deliver_fs_get_volume_status(struct afs_call *call)
 }
 
 /*
- * Destroy a YFS.GetVolumeStatus call.
- */
-static void yfs_get_volume_status_call_destructor(struct afs_call *call)
-{
-	kfree(call->reply[2]);
-	call->reply[2] = NULL;
-	afs_flat_call_destructor(call);
-}
-
-/*
  * YFS.GetVolumeStatus operation type
  */
 static const struct afs_call_type yfs_RXYFSGetVolumeStatus = {
 	.name		= "YFS.GetVolumeStatus",
 	.op		= yfs_FS_GetVolumeStatus,
 	.deliver	= yfs_deliver_fs_get_volume_status,
-	.destructor	= yfs_get_volume_status_call_destructor,
+	.destructor	= afs_flat_call_destructor,
 };
 
 /*
@@ -1719,28 +1556,21 @@ int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
 	struct afs_call *call;
 	struct afs_net *net = afs_v2net(vnode);
 	__be32 *bp;
-	void *tmpbuf;
 
 	_enter("");
 
-	tmpbuf = kmalloc(AFSOPAQUEMAX, GFP_KERNEL);
-	if (!tmpbuf)
-		return -ENOMEM;
-
 	call = afs_alloc_flat_call(net, &yfs_RXYFSGetVolumeStatus,
 				   sizeof(__be32) * 2 +
 				   sizeof(struct yfs_xdr_u64),
-				   sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
-				   sizeof(__be32));
-	if (!call) {
-		kfree(tmpbuf);
+				   max_t(size_t,
+					 sizeof(struct yfs_xdr_YFSFetchVolumeStatus) +
+					 sizeof(__be32),
+					 AFSOPAQUEMAX + 1));
+	if (!call)
 		return -ENOMEM;
-	}
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
-	call->reply[1] = vs;
-	call->reply[2] = tmpbuf;
+	call->out_volstatus = vs;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1751,34 +1581,9 @@ int yfs_fs_get_volume_status(struct afs_fs_cursor *fc,
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
-}
-
-/*
- * Deliver reply data to an YFS.SetLock, YFS.ExtendLock or YFS.ReleaseLock
- */
-static int yfs_deliver_fs_xxxx_lock(struct afs_call *call)
-{
-	struct afs_vnode *vnode = call->reply[0];
-	const __be32 *bp;
-	int ret;
-
-	_enter("{%u}", call->unmarshall);
-
-	ret = afs_transfer_reply(call);
-	if (ret < 0)
-		return ret;
-
-	/* unmarshall the reply once we've received all of it */
-	bp = call->buffer;
-	ret = yfs_decode_status(call, &bp, &vnode->status, vnode,
-				&call->expected_version, NULL);
-	if (ret < 0)
-		return ret;
-	xdr_decode_YFSVolSync(&bp, NULL);
-
-	_leave(" = 0 [done]");
-	return 0;
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1787,7 +1592,8 @@ static int yfs_deliver_fs_xxxx_lock(struct afs_call *call)
 static const struct afs_call_type yfs_RXYFSSetLock = {
 	.name		= "YFS.SetLock",
 	.op		= yfs_FS_SetLock,
-	.deliver	= yfs_deliver_fs_xxxx_lock,
+	.deliver	= yfs_deliver_status_and_volsync,
+	.done		= afs_lock_op_done,
 	.destructor	= afs_flat_call_destructor,
 };
 
@@ -1797,7 +1603,8 @@ static const struct afs_call_type yfs_RXYFSSetLock = {
 static const struct afs_call_type yfs_RXYFSExtendLock = {
 	.name		= "YFS.ExtendLock",
 	.op		= yfs_FS_ExtendLock,
-	.deliver	= yfs_deliver_fs_xxxx_lock,
+	.deliver	= yfs_deliver_status_and_volsync,
+	.done		= afs_lock_op_done,
 	.destructor	= afs_flat_call_destructor,
 };
 
@@ -1807,14 +1614,15 @@ static const struct afs_call_type yfs_RXYFSExtendLock = {
 static const struct afs_call_type yfs_RXYFSReleaseLock = {
 	.name		= "YFS.ReleaseLock",
 	.op		= yfs_FS_ReleaseLock,
-	.deliver	= yfs_deliver_fs_xxxx_lock,
+	.deliver	= yfs_deliver_status_and_volsync,
 	.destructor	= afs_flat_call_destructor,
 };
 
 /*
  * Set a lock on a file
  */
-int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
+int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type,
+		    struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1833,7 +1641,8 @@ int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
+	call->lvnode = vnode;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1844,14 +1653,16 @@ int yfs_fs_set_lock(struct afs_fs_cursor *fc, afs_lock_type_t type)
 	yfs_check_req(call, bp);
 
 	afs_use_fs_server(call, fc->cbi);
-	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	trace_afs_make_fs_calli(call, &vnode->fid, type);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
  * extend a lock on a file
  */
-int yfs_fs_extend_lock(struct afs_fs_cursor *fc)
+int yfs_fs_extend_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1869,7 +1680,8 @@ int yfs_fs_extend_lock(struct afs_fs_cursor *fc)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
+	call->lvnode = vnode;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1880,13 +1692,15 @@ int yfs_fs_extend_lock(struct afs_fs_cursor *fc)
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
  * release a lock on a file
  */
-int yfs_fs_release_lock(struct afs_fs_cursor *fc)
+int yfs_fs_release_lock(struct afs_fs_cursor *fc, struct afs_status_cb *scb)
 {
 	struct afs_vnode *vnode = fc->vnode;
 	struct afs_call *call;
@@ -1904,7 +1718,8 @@ int yfs_fs_release_lock(struct afs_fs_cursor *fc)
 		return -ENOMEM;
 
 	call->key = fc->key;
-	call->reply[0] = vnode;
+	call->lvnode = vnode;
+	call->out_scb = scb;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -1915,38 +1730,9 @@ int yfs_fs_release_lock(struct afs_fs_cursor *fc)
 
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &vnode->fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
-}
-
-/*
- * Deliver reply data to an FS.FetchStatus with no vnode.
- */
-static int yfs_deliver_fs_fetch_status(struct afs_call *call)
-{
-	struct afs_file_status *status = call->reply[1];
-	struct afs_callback *callback = call->reply[2];
-	struct afs_volsync *volsync = call->reply[3];
-	struct afs_vnode *vnode = call->reply[0];
-	const __be32 *bp;
-	int ret;
-
-	ret = afs_transfer_reply(call);
-	if (ret < 0)
-		return ret;
-
-	_enter("{%llx:%llu}", vnode->fid.vid, vnode->fid.vnode);
-
-	/* unmarshall the reply once we've received all of it */
-	bp = call->buffer;
-	ret = yfs_decode_status(call, &bp, status, vnode,
-				&call->expected_version, NULL);
-	if (ret < 0)
-		return ret;
-	xdr_decode_YFSCallBack_raw(&bp, callback);
-	xdr_decode_YFSVolSync(&bp, volsync);
-
-	_leave(" = 0 [done]");
-	return 0;
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -1955,7 +1741,7 @@ static int yfs_deliver_fs_fetch_status(struct afs_call *call)
 static const struct afs_call_type yfs_RXYFSFetchStatus = {
 	.name		= "YFS.FetchStatus",
 	.op		= yfs_FS_FetchStatus,
-	.deliver	= yfs_deliver_fs_fetch_status,
+	.deliver	= yfs_deliver_fs_status_cb_and_volsync,
 	.destructor	= afs_flat_call_destructor,
 };
 
@@ -1965,8 +1751,7 @@ static const struct afs_call_type yfs_RXYFSFetchStatus = {
 int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
 			struct afs_net *net,
 			struct afs_fid *fid,
-			struct afs_file_status *status,
-			struct afs_callback *callback,
+			struct afs_status_cb *scb,
 			struct afs_volsync *volsync)
 {
 	struct afs_call *call;
@@ -1987,11 +1772,8 @@ int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
 	}
 
 	call->key = fc->key;
-	call->reply[0] = NULL; /* vnode for fid[0] */
-	call->reply[1] = status;
-	call->reply[2] = callback;
-	call->reply[3] = volsync;
-	call->expected_version = 1; /* vnode->status.data_version */
+	call->out_scb = scb;
+	call->out_volsync = volsync;
 
 	/* marshall the parameters */
 	bp = call->request;
@@ -2000,10 +1782,11 @@ int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
 	bp = xdr_encode_YFSFid(bp, fid);
 	yfs_check_req(call, bp);
 
-	call->cb_break = fc->cb_break;
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, fid);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
 
 /*
@@ -2011,9 +1794,7 @@ int yfs_fs_fetch_status(struct afs_fs_cursor *fc,
  */
 static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 {
-	struct afs_file_status *statuses;
-	struct afs_callback *callbacks;
-	struct afs_vnode *vnode = call->reply[0];
+	struct afs_status_cb *scb;
 	const __be32 *bp;
 	u32 tmp;
 	int ret;
@@ -2026,6 +1807,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		call->unmarshall++;
 
 		/* Extract the file status count and array in two steps */
+		/* Fall through */
 	case 1:
 		_debug("extract status count");
 		ret = afs_extract_data(call, true);
@@ -2043,6 +1825,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	more_counts:
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSFetchStatus));
 
+		/* Fall through */
 	case 2:
 		_debug("extract status array %u", call->count);
 		ret = afs_extract_data(call, true);
@@ -2050,10 +1833,8 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 			return ret;
 
 		bp = call->buffer;
-		statuses = call->reply[1];
-		ret = yfs_decode_status(call, &bp, &statuses[call->count],
-					call->count == 0 ? vnode : NULL,
-					NULL, NULL);
+		scb = &call->out_scb[call->count];
+		ret = xdr_decode_YFSFetchStatus(&bp, call, scb);
 		if (ret < 0)
 			return ret;
 
@@ -2066,6 +1847,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		afs_extract_to_tmp(call);
 
 		/* Extract the callback count and array in two steps */
+		/* Fall through */
 	case 3:
 		_debug("extract CB count");
 		ret = afs_extract_data(call, true);
@@ -2082,6 +1864,7 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 	more_cbs:
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSCallBack));
 
+		/* Fall through */
 	case 4:
 		_debug("extract CB array");
 		ret = afs_extract_data(call, true);
@@ -2090,13 +1873,8 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 
 		_debug("unmarshall CB array");
 		bp = call->buffer;
-		callbacks = call->reply[2];
-		xdr_decode_YFSCallBack_raw(&bp, &callbacks[call->count]);
-		statuses = call->reply[1];
-		if (call->count == 0 && vnode && statuses[0].abort_code == 0) {
-			bp = call->buffer;
-			xdr_decode_YFSCallBack(call, vnode, &bp);
-		}
+		scb = &call->out_scb[call->count];
+		xdr_decode_YFSCallBack(&bp, call, scb);
 		call->count++;
 		if (call->count < call->count2)
 			goto more_cbs;
@@ -2104,16 +1882,18 @@ static int yfs_deliver_fs_inline_bulk_status(struct afs_call *call)
 		afs_extract_to_buf(call, sizeof(struct yfs_xdr_YFSVolSync));
 		call->unmarshall++;
 
+		/* Fall through */
 	case 5:
 		ret = afs_extract_data(call, false);
 		if (ret < 0)
 			return ret;
 
 		bp = call->buffer;
-		xdr_decode_YFSVolSync(&bp, call->reply[3]);
+		xdr_decode_YFSVolSync(&bp, call->out_volsync);
 
 		call->unmarshall++;
 
+		/* Fall through */
 	case 6:
 		break;
 	}
@@ -2138,8 +1918,7 @@ static const struct afs_call_type yfs_RXYFSInlineBulkStatus = {
 int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
 			      struct afs_net *net,
 			      struct afs_fid *fids,
-			      struct afs_file_status *statuses,
-			      struct afs_callback *callbacks,
+			      struct afs_status_cb *statuses,
 			      unsigned int nr_fids,
 			      struct afs_volsync *volsync)
 {
@@ -2162,10 +1941,8 @@ int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
 	}
 
 	call->key = fc->key;
-	call->reply[0] = NULL; /* vnode for fid[0] */
-	call->reply[1] = statuses;
-	call->reply[2] = callbacks;
-	call->reply[3] = volsync;
+	call->out_scb = statuses;
+	call->out_volsync = volsync;
 	call->count2 = nr_fids;
 
 	/* marshall the parameters */
@@ -2177,8 +1954,234 @@ int yfs_fs_inline_bulk_status(struct afs_fs_cursor *fc,
 		bp = xdr_encode_YFSFid(bp, &fids[i]);
 	yfs_check_req(call, bp);
 
-	call->cb_break = fc->cb_break;
 	afs_use_fs_server(call, fc->cbi);
 	trace_afs_make_fs_call(call, &fids[0]);
-	return afs_make_call(&fc->ac, call, GFP_NOFS, false);
+	afs_set_fc_call(call, fc);
+	afs_make_call(&fc->ac, call, GFP_NOFS);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
+}
+
+/*
+ * Deliver reply data to an YFS.FetchOpaqueACL.
+ */
+static int yfs_deliver_fs_fetch_opaque_acl(struct afs_call *call)
+{
+	struct yfs_acl *yacl = call->out_yacl;
+	struct afs_acl *acl;
+	const __be32 *bp;
+	unsigned int size;
+	int ret;
+
+	_enter("{%u}", call->unmarshall);
+
+	switch (call->unmarshall) {
+	case 0:
+		afs_extract_to_tmp(call);
+		call->unmarshall++;
+
+		/* Extract the file ACL length */
+	case 1:
+		ret = afs_extract_data(call, true);
+		if (ret < 0)
+			return ret;
+
+		size = call->count2 = ntohl(call->tmp);
+		size = round_up(size, 4);
+
+		if (yacl->flags & YFS_ACL_WANT_ACL) {
+			acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
+			if (!acl)
+				return -ENOMEM;
+			yacl->acl = acl;
+			acl->size = call->count2;
+			afs_extract_begin(call, acl->data, size);
+		} else {
+			iov_iter_discard(&call->iter, READ, size);
+		}
+		call->unmarshall++;
+
+		/* Extract the file ACL */
+	case 2:
+		ret = afs_extract_data(call, true);
+		if (ret < 0)
+			return ret;
+
+		afs_extract_to_tmp(call);
+		call->unmarshall++;
+
+		/* Extract the volume ACL length */
+	case 3:
+		ret = afs_extract_data(call, true);
+		if (ret < 0)
+			return ret;
+
+		size = call->count2 = ntohl(call->tmp);
+		size = round_up(size, 4);
+
+		if (yacl->flags & YFS_ACL_WANT_VOL_ACL) {
+			acl = kmalloc(struct_size(acl, data, size), GFP_KERNEL);
+			if (!acl)
+				return -ENOMEM;
+			yacl->vol_acl = acl;
+			acl->size = call->count2;
+			afs_extract_begin(call, acl->data, size);
+		} else {
+			iov_iter_discard(&call->iter, READ, size);
+		}
+		call->unmarshall++;
+
+		/* Extract the volume ACL */
+	case 4:
+		ret = afs_extract_data(call, true);
+		if (ret < 0)
+			return ret;
+
+		afs_extract_to_buf(call,
+				   sizeof(__be32) * 2 +
+				   sizeof(struct yfs_xdr_YFSFetchStatus) +
+				   sizeof(struct yfs_xdr_YFSVolSync));
+		call->unmarshall++;
+
+		/* extract the metadata */
+	case 5:
+		ret = afs_extract_data(call, false);
+		if (ret < 0)
+			return ret;
+
+		bp = call->buffer;
+		yacl->inherit_flag = ntohl(*bp++);
+		yacl->num_cleaned = ntohl(*bp++);
+		ret = xdr_decode_YFSFetchStatus(&bp, call, call->out_scb);
+		if (ret < 0)
+			return ret;
+		xdr_decode_YFSVolSync(&bp, call->out_volsync);
+
+		call->unmarshall++;
+
+	case 6:
+		break;
+	}
+
+	_leave(" = 0 [done]");
+	return 0;
+}
+
+void yfs_free_opaque_acl(struct yfs_acl *yacl)
+{
+	if (yacl) {
+		kfree(yacl->acl);
+		kfree(yacl->vol_acl);
+		kfree(yacl);
+	}
+}
+
+/*
+ * YFS.FetchOpaqueACL operation type
+ */
+static const struct afs_call_type yfs_RXYFSFetchOpaqueACL = {
+	.name		= "YFS.FetchOpaqueACL",
+	.op		= yfs_FS_FetchOpaqueACL,
+	.deliver	= yfs_deliver_fs_fetch_opaque_acl,
+	.destructor	= afs_flat_call_destructor,
+};
+
+/*
+ * Fetch the YFS advanced ACLs for a file.
+ */
+struct yfs_acl *yfs_fs_fetch_opaque_acl(struct afs_fs_cursor *fc,
+					struct yfs_acl *yacl,
+					struct afs_status_cb *scb)
+{
+	struct afs_vnode *vnode = fc->vnode;
+	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
+	__be32 *bp;
+
+	_enter(",%x,{%llx:%llu},,",
+	       key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
+
+	call = afs_alloc_flat_call(net, &yfs_RXYFSFetchOpaqueACL,
+				   sizeof(__be32) * 2 +
+				   sizeof(struct yfs_xdr_YFSFid),
+				   sizeof(__be32) * 2 +
+				   sizeof(struct yfs_xdr_YFSFetchStatus) +
+				   sizeof(struct yfs_xdr_YFSVolSync));
+	if (!call) {
+		fc->ac.error = -ENOMEM;
+		return ERR_PTR(-ENOMEM);
+	}
+
+	call->key = fc->key;
+	call->out_yacl = yacl;
+	call->out_scb = scb;
+	call->out_volsync = NULL;
+
+	/* marshall the parameters */
+	bp = call->request;
+	bp = xdr_encode_u32(bp, YFSFETCHOPAQUEACL);
+	bp = xdr_encode_u32(bp, 0); /* RPC flags */
+	bp = xdr_encode_YFSFid(bp, &vnode->fid);
+	yfs_check_req(call, bp);
+
+	afs_use_fs_server(call, fc->cbi);
+	trace_afs_make_fs_call(call, &vnode->fid);
+	afs_make_call(&fc->ac, call, GFP_KERNEL);
+	return (struct yfs_acl *)afs_wait_for_call_to_complete(call, &fc->ac);
+}
+
+/*
+ * YFS.StoreOpaqueACL2 operation type
+ */
+static const struct afs_call_type yfs_RXYFSStoreOpaqueACL2 = {
+	.name		= "YFS.StoreOpaqueACL2",
+	.op		= yfs_FS_StoreOpaqueACL2,
+	.deliver	= yfs_deliver_status_and_volsync,
+	.destructor	= afs_flat_call_destructor,
+};
+
+/*
+ * Fetch the YFS ACL for a file.
+ */
+int yfs_fs_store_opaque_acl2(struct afs_fs_cursor *fc, const struct afs_acl *acl,
+			     struct afs_status_cb *scb)
+{
+	struct afs_vnode *vnode = fc->vnode;
+	struct afs_call *call;
+	struct afs_net *net = afs_v2net(vnode);
+	size_t size;
+	__be32 *bp;
+
+	_enter(",%x,{%llx:%llu},,",
+	       key_serial(fc->key), vnode->fid.vid, vnode->fid.vnode);
+
+	size = round_up(acl->size, 4);
+	call = afs_alloc_flat_call(net, &yfs_RXYFSStoreStatus,
+				   sizeof(__be32) * 2 +
+				   sizeof(struct yfs_xdr_YFSFid) +
+				   sizeof(__be32) + size,
+				   sizeof(struct yfs_xdr_YFSFetchStatus) +
+				   sizeof(struct yfs_xdr_YFSVolSync));
+	if (!call) {
+		fc->ac.error = -ENOMEM;
+		return -ENOMEM;
+	}
+
+	call->key = fc->key;
+	call->out_scb = scb;
+	call->out_volsync = NULL;
+
+	/* marshall the parameters */
+	bp = call->request;
+	bp = xdr_encode_u32(bp, YFSSTOREOPAQUEACL2);
+	bp = xdr_encode_u32(bp, 0); /* RPC flags */
+	bp = xdr_encode_YFSFid(bp, &vnode->fid);
+	bp = xdr_encode_u32(bp, acl->size);
+	memcpy(bp, acl->data, acl->size);
+	if (acl->size != size)
+		memset((void *)bp + acl->size, 0, size - acl->size);
+	yfs_check_req(call, bp);
+
+	trace_afs_make_fs_call(call, &vnode->fid);
+	afs_make_call(&fc->ac, call, GFP_KERNEL);
+	return afs_wait_for_call_to_complete(call, &fc->ac);
 }
diff --git a/fs/aio.c b/fs/aio.c
index aaaaf4d12c73..2d405733a8c6 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -167,9 +167,13 @@ struct kioctx {
 	unsigned		id;
 };
 
+/*
+ * First field must be the file pointer in all the
+ * iocb unions! See also 'struct kiocb' in <linux/fs.h>
+ */
 struct fsync_iocb {
-	struct work_struct	work;
 	struct file		*file;
+	struct work_struct	work;
 	bool			datasync;
 };
 
@@ -177,14 +181,21 @@ struct poll_iocb {
 	struct file		*file;
 	struct wait_queue_head	*head;
 	__poll_t		events;
-	bool			woken;
+	bool			done;
 	bool			cancelled;
 	struct wait_queue_entry	wait;
 	struct work_struct	work;
 };
 
+/*
+ * NOTE! Each of the iocb union members has the file pointer
+ * as the first entry in their struct definition. So you can
+ * access the file pointer through any of the sub-structs,
+ * or directly as just 'ki_filp' in this struct.
+ */
 struct aio_kiocb {
 	union {
+		struct file		*ki_filp;
 		struct kiocb		rw;
 		struct fsync_iocb	fsync;
 		struct poll_iocb	poll;
@@ -193,8 +204,7 @@ struct aio_kiocb {
 	struct kioctx		*ki_ctx;
 	kiocb_cancel_fn		*ki_cancel;
 
-	struct iocb __user	*ki_user_iocb;	/* user's aiocb */
-	__u64			ki_user_data;	/* user's data for completion */
+	struct io_event		ki_res;
 
 	struct list_head	ki_list;	/* the aio core uses this
 						 * for cancellation */
@@ -1011,6 +1021,9 @@ static bool get_reqs_available(struct kioctx *ctx)
 /* aio_get_req
  *	Allocate a slot for an aio request.
  * Returns NULL if no requests are free.
+ *
+ * The refcount is initialized to 2 - one for the async op completion,
+ * one for the synchronous code that does this.
  */
 static inline struct aio_kiocb *aio_get_req(struct kioctx *ctx)
 {
@@ -1020,10 +1033,15 @@ static inline struct aio_kiocb *aio_get_req(struct kioctx *ctx)
 	if (unlikely(!req))
 		return NULL;
 
+	if (unlikely(!get_reqs_available(ctx))) {
+		kmem_cache_free(kiocb_cachep, req);
+		return NULL;
+	}
+
 	percpu_ref_get(&ctx->reqs);
 	req->ki_ctx = ctx;
 	INIT_LIST_HEAD(&req->ki_list);
-	refcount_set(&req->ki_refcnt, 0);
+	refcount_set(&req->ki_refcnt, 2);
 	req->ki_eventfd = NULL;
 	return req;
 }
@@ -1056,28 +1074,20 @@ out:
 	return ret;
 }
 
-static inline void iocb_put(struct aio_kiocb *iocb)
-{
-	if (refcount_read(&iocb->ki_refcnt) == 0 ||
-	    refcount_dec_and_test(&iocb->ki_refcnt)) {
-		percpu_ref_put(&iocb->ki_ctx->reqs);
-		kmem_cache_free(kiocb_cachep, iocb);
-	}
-}
-
-static void aio_fill_event(struct io_event *ev, struct aio_kiocb *iocb,
-			   long res, long res2)
+static inline void iocb_destroy(struct aio_kiocb *iocb)
 {
-	ev->obj = (u64)(unsigned long)iocb->ki_user_iocb;
-	ev->data = iocb->ki_user_data;
-	ev->res = res;
-	ev->res2 = res2;
+	if (iocb->ki_eventfd)
+		eventfd_ctx_put(iocb->ki_eventfd);
+	if (iocb->ki_filp)
+		fput(iocb->ki_filp);
+	percpu_ref_put(&iocb->ki_ctx->reqs);
+	kmem_cache_free(kiocb_cachep, iocb);
 }
 
 /* aio_complete
  *	Called when the io request on the given iocb is complete.
  */
-static void aio_complete(struct aio_kiocb *iocb, long res, long res2)
+static void aio_complete(struct aio_kiocb *iocb)
 {
 	struct kioctx	*ctx = iocb->ki_ctx;
 	struct aio_ring	*ring;
@@ -1101,14 +1111,14 @@ static void aio_complete(struct aio_kiocb *iocb, long res, long res2)
 	ev_page = kmap_atomic(ctx->ring_pages[pos / AIO_EVENTS_PER_PAGE]);
 	event = ev_page + pos % AIO_EVENTS_PER_PAGE;
 
-	aio_fill_event(event, iocb, res, res2);
+	*event = iocb->ki_res;
 
 	kunmap_atomic(ev_page);
 	flush_dcache_page(ctx->ring_pages[pos / AIO_EVENTS_PER_PAGE]);
 
-	pr_debug("%p[%u]: %p: %p %Lx %lx %lx\n",
-		 ctx, tail, iocb, iocb->ki_user_iocb, iocb->ki_user_data,
-		 res, res2);
+	pr_debug("%p[%u]: %p: %p %Lx %Lx %Lx\n", ctx, tail, iocb,
+		 (void __user *)(unsigned long)iocb->ki_res.obj,
+		 iocb->ki_res.data, iocb->ki_res.res, iocb->ki_res.res2);
 
 	/* after flagging the request as done, we
 	 * must never even look at it again
@@ -1135,10 +1145,8 @@ static void aio_complete(struct aio_kiocb *iocb, long res, long res2)
 	 * eventfd. The eventfd_signal() function is safe to be called
 	 * from IRQ context.
 	 */
-	if (iocb->ki_eventfd) {
+	if (iocb->ki_eventfd)
 		eventfd_signal(iocb->ki_eventfd, 1);
-		eventfd_ctx_put(iocb->ki_eventfd);
-	}
 
 	/*
 	 * We have to order our ring_info tail store above and test
@@ -1150,7 +1158,14 @@ static void aio_complete(struct aio_kiocb *iocb, long res, long res2)
 
 	if (waitqueue_active(&ctx->wait))
 		wake_up(&ctx->wait);
-	iocb_put(iocb);
+}
+
+static inline void iocb_put(struct aio_kiocb *iocb)
+{
+	if (refcount_dec_and_test(&iocb->ki_refcnt)) {
+		aio_complete(iocb);
+		iocb_destroy(iocb);
+	}
 }
 
 /* aio_read_events_ring
@@ -1424,17 +1439,15 @@ static void aio_complete_rw(struct kiocb *kiocb, long res, long res2)
 		file_end_write(kiocb->ki_filp);
 	}
 
-	fput(kiocb->ki_filp);
-	aio_complete(iocb, res, res2);
+	iocb->ki_res.res = res;
+	iocb->ki_res.res2 = res2;
+	iocb_put(iocb);
 }
 
 static int aio_prep_rw(struct kiocb *req, const struct iocb *iocb)
 {
 	int ret;
 
-	req->ki_filp = fget(iocb->aio_fildes);
-	if (unlikely(!req->ki_filp))
-		return -EBADF;
 	req->ki_complete = aio_complete_rw;
 	req->private = NULL;
 	req->ki_pos = iocb->aio_offset;
@@ -1451,7 +1464,7 @@ static int aio_prep_rw(struct kiocb *req, const struct iocb *iocb)
 		ret = ioprio_check_cap(iocb->aio_reqprio);
 		if (ret) {
 			pr_debug("aio ioprio check cap error: %d\n", ret);
-			goto out_fput;
+			return ret;
 		}
 
 		req->ki_ioprio = iocb->aio_reqprio;
@@ -1460,18 +1473,15 @@ static int aio_prep_rw(struct kiocb *req, const struct iocb *iocb)
 
 	ret = kiocb_set_rw_flags(req, iocb->aio_rw_flags);
 	if (unlikely(ret))
-		goto out_fput;
+		return ret;
 
 	req->ki_flags &= ~IOCB_HIPRI; /* no one is going to poll for this I/O */
 	return 0;
-
-out_fput:
-	fput(req->ki_filp);
-	return ret;
 }
 
-static int aio_setup_rw(int rw, const struct iocb *iocb, struct iovec **iovec,
-		bool vectored, bool compat, struct iov_iter *iter)
+static ssize_t aio_setup_rw(int rw, const struct iocb *iocb,
+		struct iovec **iovec, bool vectored, bool compat,
+		struct iov_iter *iter)
 {
 	void __user *buf = (void __user *)(uintptr_t)iocb->aio_buf;
 	size_t len = iocb->aio_nbytes;
@@ -1509,62 +1519,55 @@ static inline void aio_rw_done(struct kiocb *req, ssize_t ret)
 	}
 }
 
-static ssize_t aio_read(struct kiocb *req, const struct iocb *iocb,
+static int aio_read(struct kiocb *req, const struct iocb *iocb,
 			bool vectored, bool compat)
 {
 	struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
 	struct iov_iter iter;
 	struct file *file;
-	ssize_t ret;
+	int ret;
 
 	ret = aio_prep_rw(req, iocb);
 	if (ret)
 		return ret;
 	file = req->ki_filp;
-
-	ret = -EBADF;
 	if (unlikely(!(file->f_mode & FMODE_READ)))
-		goto out_fput;
+		return -EBADF;
 	ret = -EINVAL;
 	if (unlikely(!file->f_op->read_iter))
-		goto out_fput;
+		return -EINVAL;
 
 	ret = aio_setup_rw(READ, iocb, &iovec, vectored, compat, &iter);
-	if (ret)
-		goto out_fput;
+	if (ret < 0)
+		return ret;
 	ret = rw_verify_area(READ, file, &req->ki_pos, iov_iter_count(&iter));
 	if (!ret)
 		aio_rw_done(req, call_read_iter(file, req, &iter));
 	kfree(iovec);
-out_fput:
-	if (unlikely(ret))
-		fput(file);
 	return ret;
 }
 
-static ssize_t aio_write(struct kiocb *req, const struct iocb *iocb,
+static int aio_write(struct kiocb *req, const struct iocb *iocb,
 			 bool vectored, bool compat)
 {
 	struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
 	struct iov_iter iter;
 	struct file *file;
-	ssize_t ret;
+	int ret;
 
 	ret = aio_prep_rw(req, iocb);
 	if (ret)
 		return ret;
 	file = req->ki_filp;
 
-	ret = -EBADF;
 	if (unlikely(!(file->f_mode & FMODE_WRITE)))
-		goto out_fput;
-	ret = -EINVAL;
+		return -EBADF;
 	if (unlikely(!file->f_op->write_iter))
-		goto out_fput;
+		return -EINVAL;
 
 	ret = aio_setup_rw(WRITE, iocb, &iovec, vectored, compat, &iter);
-	if (ret)
-		goto out_fput;
+	if (ret < 0)
+		return ret;
 	ret = rw_verify_area(WRITE, file, &req->ki_pos, iov_iter_count(&iter));
 	if (!ret) {
 		/*
@@ -1582,20 +1585,15 @@ static ssize_t aio_write(struct kiocb *req, const struct iocb *iocb,
 		aio_rw_done(req, call_write_iter(file, req, &iter));
 	}
 	kfree(iovec);
-out_fput:
-	if (unlikely(ret))
-		fput(file);
 	return ret;
 }
 
 static void aio_fsync_work(struct work_struct *work)
 {
-	struct fsync_iocb *req = container_of(work, struct fsync_iocb, work);
-	int ret;
+	struct aio_kiocb *iocb = container_of(work, struct aio_kiocb, fsync.work);
 
-	ret = vfs_fsync(req->file, req->datasync);
-	fput(req->file);
-	aio_complete(container_of(req, struct aio_kiocb, fsync), ret, 0);
+	iocb->ki_res.res = vfs_fsync(iocb->fsync.file, iocb->fsync.datasync);
+	iocb_put(iocb);
 }
 
 static int aio_fsync(struct fsync_iocb *req, const struct iocb *iocb,
@@ -1605,13 +1603,8 @@ static int aio_fsync(struct fsync_iocb *req, const struct iocb *iocb,
 			iocb->aio_rw_flags))
 		return -EINVAL;
 
-	req->file = fget(iocb->aio_fildes);
-	if (unlikely(!req->file))
-		return -EBADF;
-	if (unlikely(!req->file->f_op->fsync)) {
-		fput(req->file);
+	if (unlikely(!req->file->f_op->fsync))
 		return -EINVAL;
-	}
 
 	req->datasync = datasync;
 	INIT_WORK(&req->work, aio_fsync_work);
@@ -1619,14 +1612,6 @@ static int aio_fsync(struct fsync_iocb *req, const struct iocb *iocb,
 	return 0;
 }
 
-static inline void aio_poll_complete(struct aio_kiocb *iocb, __poll_t mask)
-{
-	struct file *file = iocb->poll.file;
-
-	aio_complete(iocb, mangle_poll(mask), 0);
-	fput(file);
-}
-
 static void aio_poll_complete_work(struct work_struct *work)
 {
 	struct poll_iocb *req = container_of(work, struct poll_iocb, work);
@@ -1652,9 +1637,11 @@ static void aio_poll_complete_work(struct work_struct *work)
 		return;
 	}
 	list_del_init(&iocb->ki_list);
+	iocb->ki_res.res = mangle_poll(mask);
+	req->done = true;
 	spin_unlock_irq(&ctx->ctx_lock);
 
-	aio_poll_complete(iocb, mask);
+	iocb_put(iocb);
 }
 
 /* assumes we are called with irqs disabled */
@@ -1680,27 +1667,29 @@ static int aio_poll_wake(struct wait_queue_entry *wait, unsigned mode, int sync,
 	struct poll_iocb *req = container_of(wait, struct poll_iocb, wait);
 	struct aio_kiocb *iocb = container_of(req, struct aio_kiocb, poll);
 	__poll_t mask = key_to_poll(key);
-
-	req->woken = true;
+	unsigned long flags;
 
 	/* for instances that support it check for an event match first: */
-	if (mask) {
-		if (!(mask & req->events))
-			return 0;
+	if (mask && !(mask & req->events))
+		return 0;
 
-		/* try to complete the iocb inline if we can: */
-		if (spin_trylock(&iocb->ki_ctx->ctx_lock)) {
-			list_del(&iocb->ki_list);
-			spin_unlock(&iocb->ki_ctx->ctx_lock);
+	list_del_init(&req->wait.entry);
 
-			list_del_init(&req->wait.entry);
-			aio_poll_complete(iocb, mask);
-			return 1;
-		}
+	if (mask && spin_trylock_irqsave(&iocb->ki_ctx->ctx_lock, flags)) {
+		/*
+		 * Try to complete the iocb inline if we can. Use
+		 * irqsave/irqrestore because not all filesystems (e.g. fuse)
+		 * call this function with IRQs disabled and because IRQs
+		 * have to be disabled before ctx_lock is obtained.
+		 */
+		list_del(&iocb->ki_list);
+		iocb->ki_res.res = mangle_poll(mask);
+		req->done = true;
+		spin_unlock_irqrestore(&iocb->ki_ctx->ctx_lock, flags);
+		iocb_put(iocb);
+	} else {
+		schedule_work(&req->work);
 	}
-
-	list_del_init(&req->wait.entry);
-	schedule_work(&req->work);
 	return 1;
 }
 
@@ -1727,11 +1716,12 @@ aio_poll_queue_proc(struct file *file, struct wait_queue_head *head,
 	add_wait_queue(head, &pt->iocb->poll.wait);
 }
 
-static ssize_t aio_poll(struct aio_kiocb *aiocb, const struct iocb *iocb)
+static int aio_poll(struct aio_kiocb *aiocb, const struct iocb *iocb)
 {
 	struct kioctx *ctx = aiocb->ki_ctx;
 	struct poll_iocb *req = &aiocb->poll;
 	struct aio_poll_table apt;
+	bool cancel = false;
 	__poll_t mask;
 
 	/* reject any unknown events outside the normal event mask. */
@@ -1743,12 +1733,9 @@ static ssize_t aio_poll(struct aio_kiocb *aiocb, const struct iocb *iocb)
 
 	INIT_WORK(&req->work, aio_poll_complete_work);
 	req->events = demangle_poll(iocb->aio_buf) | EPOLLERR | EPOLLHUP;
-	req->file = fget(iocb->aio_fildes);
-	if (unlikely(!req->file))
-		return -EBADF;
 
 	req->head = NULL;
-	req->woken = false;
+	req->done = false;
 	req->cancelled = false;
 
 	apt.pt._qproc = aio_poll_queue_proc;
@@ -1760,153 +1747,135 @@ static ssize_t aio_poll(struct aio_kiocb *aiocb, const struct iocb *iocb)
 	INIT_LIST_HEAD(&req->wait.entry);
 	init_waitqueue_func_entry(&req->wait, aio_poll_wake);
 
-	/* one for removal from waitqueue, one for this function */
-	refcount_set(&aiocb->ki_refcnt, 2);
-
 	mask = vfs_poll(req->file, &apt.pt) & req->events;
-	if (unlikely(!req->head)) {
-		/* we did not manage to set up a waitqueue, done */
-		goto out;
-	}
-
 	spin_lock_irq(&ctx->ctx_lock);
-	spin_lock(&req->head->lock);
-	if (req->woken) {
-		/* wake_up context handles the rest */
-		mask = 0;
+	if (likely(req->head)) {
+		spin_lock(&req->head->lock);
+		if (unlikely(list_empty(&req->wait.entry))) {
+			if (apt.error)
+				cancel = true;
+			apt.error = 0;
+			mask = 0;
+		}
+		if (mask || apt.error) {
+			list_del_init(&req->wait.entry);
+		} else if (cancel) {
+			WRITE_ONCE(req->cancelled, true);
+		} else if (!req->done) { /* actually waiting for an event */
+			list_add_tail(&aiocb->ki_list, &ctx->active_reqs);
+			aiocb->ki_cancel = aio_poll_cancel;
+		}
+		spin_unlock(&req->head->lock);
+	}
+	if (mask) { /* no async, we'd stolen it */
+		aiocb->ki_res.res = mangle_poll(mask);
 		apt.error = 0;
-	} else if (mask || apt.error) {
-		/* if we get an error or a mask we are done */
-		WARN_ON_ONCE(list_empty(&req->wait.entry));
-		list_del_init(&req->wait.entry);
-	} else {
-		/* actually waiting for an event */
-		list_add_tail(&aiocb->ki_list, &ctx->active_reqs);
-		aiocb->ki_cancel = aio_poll_cancel;
 	}
-	spin_unlock(&req->head->lock);
 	spin_unlock_irq(&ctx->ctx_lock);
-
-out:
-	if (unlikely(apt.error)) {
-		fput(req->file);
-		return apt.error;
-	}
-
 	if (mask)
-		aio_poll_complete(aiocb, mask);
-	iocb_put(aiocb);
-	return 0;
+		iocb_put(aiocb);
+	return apt.error;
 }
 
 static int __io_submit_one(struct kioctx *ctx, const struct iocb *iocb,
-			   struct iocb __user *user_iocb, bool compat)
+			   struct iocb __user *user_iocb, struct aio_kiocb *req,
+			   bool compat)
 {
-	struct aio_kiocb *req;
-	ssize_t ret;
-
-	/* enforce forwards compatibility on users */
-	if (unlikely(iocb->aio_reserved2)) {
-		pr_debug("EINVAL: reserve field set\n");
-		return -EINVAL;
-	}
-
-	/* prevent overflows */
-	if (unlikely(
-	    (iocb->aio_buf != (unsigned long)iocb->aio_buf) ||
-	    (iocb->aio_nbytes != (size_t)iocb->aio_nbytes) ||
-	    ((ssize_t)iocb->aio_nbytes < 0)
-	   )) {
-		pr_debug("EINVAL: overflow check\n");
-		return -EINVAL;
-	}
-
-	if (!get_reqs_available(ctx))
-		return -EAGAIN;
-
-	ret = -EAGAIN;
-	req = aio_get_req(ctx);
-	if (unlikely(!req))
-		goto out_put_reqs_available;
+	req->ki_filp = fget(iocb->aio_fildes);
+	if (unlikely(!req->ki_filp))
+		return -EBADF;
 
 	if (iocb->aio_flags & IOCB_FLAG_RESFD) {
+		struct eventfd_ctx *eventfd;
 		/*
 		 * If the IOCB_FLAG_RESFD flag of aio_flags is set, get an
 		 * instance of the file* now. The file descriptor must be
 		 * an eventfd() fd, and will be signaled for each completed
 		 * event using the eventfd_signal() function.
 		 */
-		req->ki_eventfd = eventfd_ctx_fdget((int) iocb->aio_resfd);
-		if (IS_ERR(req->ki_eventfd)) {
-			ret = PTR_ERR(req->ki_eventfd);
-			req->ki_eventfd = NULL;
-			goto out_put_req;
-		}
+		eventfd = eventfd_ctx_fdget(iocb->aio_resfd);
+		if (IS_ERR(eventfd))
+			return PTR_ERR(eventfd);
+
+		req->ki_eventfd = eventfd;
 	}
 
-	ret = put_user(KIOCB_KEY, &user_iocb->aio_key);
-	if (unlikely(ret)) {
+	if (unlikely(put_user(KIOCB_KEY, &user_iocb->aio_key))) {
 		pr_debug("EFAULT: aio_key\n");
-		goto out_put_req;
+		return -EFAULT;
 	}
 
-	req->ki_user_iocb = user_iocb;
-	req->ki_user_data = iocb->aio_data;
+	req->ki_res.obj = (u64)(unsigned long)user_iocb;
+	req->ki_res.data = iocb->aio_data;
+	req->ki_res.res = 0;
+	req->ki_res.res2 = 0;
 
 	switch (iocb->aio_lio_opcode) {
 	case IOCB_CMD_PREAD:
-		ret = aio_read(&req->rw, iocb, false, compat);
-		break;
+		return aio_read(&req->rw, iocb, false, compat);
 	case IOCB_CMD_PWRITE:
-		ret = aio_write(&req->rw, iocb, false, compat);
-		break;
+		return aio_write(&req->rw, iocb, false, compat);
 	case IOCB_CMD_PREADV:
-		ret = aio_read(&req->rw, iocb, true, compat);
-		break;
+		return aio_read(&req->rw, iocb, true, compat);
 	case IOCB_CMD_PWRITEV:
-		ret = aio_write(&req->rw, iocb, true, compat);
-		break;
+		return aio_write(&req->rw, iocb, true, compat);
 	case IOCB_CMD_FSYNC:
-		ret = aio_fsync(&req->fsync, iocb, false);
-		break;
+		return aio_fsync(&req->fsync, iocb, false);
 	case IOCB_CMD_FDSYNC:
-		ret = aio_fsync(&req->fsync, iocb, true);
-		break;
+		return aio_fsync(&req->fsync, iocb, true);
 	case IOCB_CMD_POLL:
-		ret = aio_poll(req, iocb);
-		break;
+		return aio_poll(req, iocb);
 	default:
 		pr_debug("invalid aio operation %d\n", iocb->aio_lio_opcode);
-		ret = -EINVAL;
-		break;
+		return -EINVAL;
 	}
-
-	/*
-	 * If ret is 0, we'd either done aio_complete() ourselves or have
-	 * arranged for that to be done asynchronously.  Anything non-zero
-	 * means that we need to destroy req ourselves.
-	 */
-	if (ret)
-		goto out_put_req;
-	return 0;
-out_put_req:
-	if (req->ki_eventfd)
-		eventfd_ctx_put(req->ki_eventfd);
-	iocb_put(req);
-out_put_reqs_available:
-	put_reqs_available(ctx, 1);
-	return ret;
 }
 
 static int io_submit_one(struct kioctx *ctx, struct iocb __user *user_iocb,
 			 bool compat)
 {
+	struct aio_kiocb *req;
 	struct iocb iocb;
+	int err;
 
 	if (unlikely(copy_from_user(&iocb, user_iocb, sizeof(iocb))))
 		return -EFAULT;
 
-	return __io_submit_one(ctx, &iocb, user_iocb, compat);
+	/* enforce forwards compatibility on users */
+	if (unlikely(iocb.aio_reserved2)) {
+		pr_debug("EINVAL: reserve field set\n");
+		return -EINVAL;
+	}
+
+	/* prevent overflows */
+	if (unlikely(
+	    (iocb.aio_buf != (unsigned long)iocb.aio_buf) ||
+	    (iocb.aio_nbytes != (size_t)iocb.aio_nbytes) ||
+	    ((ssize_t)iocb.aio_nbytes < 0)
+	   )) {
+		pr_debug("EINVAL: overflow check\n");
+		return -EINVAL;
+	}
+
+	req = aio_get_req(ctx);
+	if (unlikely(!req))
+		return -EAGAIN;
+
+	err = __io_submit_one(ctx, &iocb, user_iocb, req, compat);
+
+	/* Done with the synchronous reference */
+	iocb_put(req);
+
+	/*
+	 * If err is 0, we'd either done aio_complete() ourselves or have
+	 * arranged for that to be done asynchronously.  Anything non-zero
+	 * means that we need to destroy req ourselves.
+	 */
+	if (unlikely(err)) {
+		iocb_destroy(req);
+		put_reqs_available(ctx, 1);
+	}
+	return err;
 }
 
 /* sys_io_submit:
@@ -2005,24 +1974,6 @@ COMPAT_SYSCALL_DEFINE3(io_submit, compat_aio_context_t, ctx_id,
 }
 #endif
 
-/* lookup_kiocb
- *	Finds a given iocb for cancellation.
- */
-static struct aio_kiocb *
-lookup_kiocb(struct kioctx *ctx, struct iocb __user *iocb)
-{
-	struct aio_kiocb *kiocb;
-
-	assert_spin_locked(&ctx->ctx_lock);
-
-	/* TODO: use a hash or array, this sucks. */
-	list_for_each_entry(kiocb, &ctx->active_reqs, ki_list) {
-		if (kiocb->ki_user_iocb == iocb)
-			return kiocb;
-	}
-	return NULL;
-}
-
 /* sys_io_cancel:
  *	Attempts to cancel an iocb previously passed to io_submit.  If
  *	the operation is successfully cancelled, the resulting event is
@@ -2040,6 +1991,7 @@ SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
 	struct aio_kiocb *kiocb;
 	int ret = -EINVAL;
 	u32 key;
+	u64 obj = (u64)(unsigned long)iocb;
 
 	if (unlikely(get_user(key, &iocb->aio_key)))
 		return -EFAULT;
@@ -2051,10 +2003,13 @@ SYSCALL_DEFINE3(io_cancel, aio_context_t, ctx_id, struct iocb __user *, iocb,
 		return -EINVAL;
 
 	spin_lock_irq(&ctx->ctx_lock);
-	kiocb = lookup_kiocb(ctx, iocb);
-	if (kiocb) {
-		ret = kiocb->ki_cancel(&kiocb->rw);
-		list_del_init(&kiocb->ki_list);
+	/* TODO: use a hash or array, this sucks. */
+	list_for_each_entry(kiocb, &ctx->active_reqs, ki_list) {
+		if (kiocb->ki_res.obj == obj) {
+			ret = kiocb->ki_cancel(&kiocb->rw);
+			list_del_init(&kiocb->ki_list);
+			break;
+		}
 	}
 	spin_unlock_irq(&ctx->ctx_lock);
 
@@ -2141,6 +2096,7 @@ SYSCALL_DEFINE6(io_pgetevents,
 	struct __aio_sigset	ksig = { NULL, };
 	sigset_t		ksigmask, sigsaved;
 	struct timespec64	ts;
+	bool interrupted;
 	int ret;
 
 	if (timeout && unlikely(get_timespec64(&ts, timeout)))
@@ -2154,8 +2110,10 @@ SYSCALL_DEFINE6(io_pgetevents,
 		return ret;
 
 	ret = do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &ts : NULL);
-	restore_user_sigmask(ksig.sigmask, &sigsaved);
-	if (signal_pending(current) && !ret)
+
+	interrupted = signal_pending(current);
+	restore_user_sigmask(ksig.sigmask, &sigsaved, interrupted);
+	if (interrupted && !ret)
 		ret = -ERESTARTNOHAND;
 
 	return ret;
@@ -2174,6 +2132,7 @@ SYSCALL_DEFINE6(io_pgetevents_time32,
 	struct __aio_sigset	ksig = { NULL, };
 	sigset_t		ksigmask, sigsaved;
 	struct timespec64	ts;
+	bool interrupted;
 	int ret;
 
 	if (timeout && unlikely(get_old_timespec32(&ts, timeout)))
@@ -2188,8 +2147,10 @@ SYSCALL_DEFINE6(io_pgetevents_time32,
 		return ret;
 
 	ret = do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &ts : NULL);
-	restore_user_sigmask(ksig.sigmask, &sigsaved);
-	if (signal_pending(current) && !ret)
+
+	interrupted = signal_pending(current);
+	restore_user_sigmask(ksig.sigmask, &sigsaved, interrupted);
+	if (interrupted && !ret)
 		ret = -ERESTARTNOHAND;
 
 	return ret;
@@ -2199,11 +2160,11 @@ SYSCALL_DEFINE6(io_pgetevents_time32,
 
 #if defined(CONFIG_COMPAT_32BIT_TIME)
 
-COMPAT_SYSCALL_DEFINE5(io_getevents, compat_aio_context_t, ctx_id,
-		       compat_long_t, min_nr,
-		       compat_long_t, nr,
-		       struct io_event __user *, events,
-		       struct old_timespec32 __user *, timeout)
+SYSCALL_DEFINE5(io_getevents_time32, __u32, ctx_id,
+		__s32, min_nr,
+		__s32, nr,
+		struct io_event __user *, events,
+		struct old_timespec32 __user *, timeout)
 {
 	struct timespec64 t;
 	int ret;
@@ -2239,6 +2200,7 @@ COMPAT_SYSCALL_DEFINE6(io_pgetevents,
 	struct __compat_aio_sigset ksig = { NULL, };
 	sigset_t ksigmask, sigsaved;
 	struct timespec64 t;
+	bool interrupted;
 	int ret;
 
 	if (timeout && get_old_timespec32(&t, timeout))
@@ -2252,8 +2214,10 @@ COMPAT_SYSCALL_DEFINE6(io_pgetevents,
 		return ret;
 
 	ret = do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &t : NULL);
-	restore_user_sigmask(ksig.sigmask, &sigsaved);
-	if (signal_pending(current) && !ret)
+
+	interrupted = signal_pending(current);
+	restore_user_sigmask(ksig.sigmask, &sigsaved, interrupted);
+	if (interrupted && !ret)
 		ret = -ERESTARTNOHAND;
 
 	return ret;
@@ -2272,6 +2236,7 @@ COMPAT_SYSCALL_DEFINE6(io_pgetevents_time64,
 	struct __compat_aio_sigset ksig = { NULL, };
 	sigset_t ksigmask, sigsaved;
 	struct timespec64 t;
+	bool interrupted;
 	int ret;
 
 	if (timeout && get_timespec64(&t, timeout))
@@ -2285,8 +2250,10 @@ COMPAT_SYSCALL_DEFINE6(io_pgetevents_time64,
 		return ret;
 
 	ret = do_io_getevents(ctx_id, min_nr, nr, events, timeout ? &t : NULL);
-	restore_user_sigmask(ksig.sigmask, &sigsaved);
-	if (signal_pending(current) && !ret)
+
+	interrupted = signal_pending(current);
+	restore_user_sigmask(ksig.sigmask, &sigsaved, interrupted);
+	if (interrupted && !ret)
 		ret = -ERESTARTNOHAND;
 
 	return ret;
diff --git a/fs/anon_inodes.c b/fs/anon_inodes.c
index 91262c34b797..c2b8663f5b00 100644
--- a/fs/anon_inodes.c
+++ b/fs/anon_inodes.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  fs/anon_inodes.c
  *
diff --git a/fs/autofs/Kconfig b/fs/autofs/Kconfig
index eaebcd430cc3..3b3a6b1423c6 100644
--- a/fs/autofs/Kconfig
+++ b/fs/autofs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config AUTOFS4_FS
 	tristate "Old Kconfig name for Kernel automounter support"
 	select AUTOFS_FS
diff --git a/fs/autofs/Makefile b/fs/autofs/Makefile
index 1f85d35ec8b7..495ac542e172 100644
--- a/fs/autofs/Makefile
+++ b/fs/autofs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux autofs-filesystem routines.
 #
diff --git a/fs/autofs/autofs_i.h b/fs/autofs/autofs_i.h
index 3e59f0ed777b..8c0c11181fad 100644
--- a/fs/autofs/autofs_i.h
+++ b/fs/autofs/autofs_i.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *  Copyright 1997-1998 Transmeta Corporation - All Rights Reserved
  *  Copyright 2005-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
  */
 
 /* Internal header file for autofs */
@@ -71,6 +68,7 @@ struct autofs_info {
 
 	kuid_t uid;
 	kgid_t gid;
+	struct rcu_head rcu;
 };
 
 #define AUTOFS_INF_EXPIRING	(1<<0) /* dentry in the process of expiring */
@@ -105,6 +103,7 @@ struct autofs_wait_queue {
 
 #define AUTOFS_SBI_CATATONIC	0x0001
 #define AUTOFS_SBI_STRICTEXPIRE 0x0002
+#define AUTOFS_SBI_IGNORE	0x0004
 
 struct autofs_sb_info {
 	u32 magic;
@@ -215,6 +214,8 @@ static inline int autofs_prepare_pipe(struct file *pipe)
 		return -EINVAL;
 	/* We want a packet pipe */
 	pipe->f_flags |= O_DIRECT;
+	/* We don't expect -EAGAIN */
+	pipe->f_flags &= ~O_NONBLOCK;
 	return 0;
 }
 
diff --git a/fs/autofs/dev-ioctl.c b/fs/autofs/dev-ioctl.c
index e9fe74d1541b..a3cdb0036c5d 100644
--- a/fs/autofs/dev-ioctl.c
+++ b/fs/autofs/dev-ioctl.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright 2008 Red Hat, Inc. All rights reserved.
  * Copyright 2008 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
  */
 
 #include <linux/miscdevice.h>
diff --git a/fs/autofs/expire.c b/fs/autofs/expire.c
index 28d9c2b1b3bb..cdff0567aacb 100644
--- a/fs/autofs/expire.c
+++ b/fs/autofs/expire.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
  * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
  * Copyright 2001-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
  */
 
 #include "autofs_i.h"
diff --git a/fs/autofs/init.c b/fs/autofs/init.c
index c0c1db2cc6ea..d3f55e874338 100644
--- a/fs/autofs/init.c
+++ b/fs/autofs/init.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
  */
 
 #include <linux/module.h>
diff --git a/fs/autofs/inode.c b/fs/autofs/inode.c
index 078992eee299..9edf243713eb 100644
--- a/fs/autofs/inode.c
+++ b/fs/autofs/inode.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
  * Copyright 2005-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
  */
 
 #include <linux/seq_file.h>
@@ -36,7 +33,7 @@ void autofs_clean_ino(struct autofs_info *ino)
 
 void autofs_free_ino(struct autofs_info *ino)
 {
-	kfree(ino);
+	kfree_rcu(ino, rcu);
 }
 
 void autofs_kill_sb(struct super_block *sb)
@@ -82,18 +79,20 @@ static int autofs_show_options(struct seq_file *m, struct dentry *root)
 	seq_printf(m, ",maxproto=%d", sbi->max_proto);
 
 	if (autofs_type_offset(sbi->type))
-		seq_printf(m, ",offset");
+		seq_puts(m, ",offset");
 	else if (autofs_type_direct(sbi->type))
-		seq_printf(m, ",direct");
+		seq_puts(m, ",direct");
 	else
-		seq_printf(m, ",indirect");
+		seq_puts(m, ",indirect");
 	if (sbi->flags & AUTOFS_SBI_STRICTEXPIRE)
-		seq_printf(m, ",strictexpire");
+		seq_puts(m, ",strictexpire");
+	if (sbi->flags & AUTOFS_SBI_IGNORE)
+		seq_puts(m, ",ignore");
 #ifdef CONFIG_CHECKPOINT_RESTORE
 	if (sbi->pipe)
 		seq_printf(m, ",pipe_ino=%ld", file_inode(sbi->pipe)->i_ino);
 	else
-		seq_printf(m, ",pipe_ino=-1");
+		seq_puts(m, ",pipe_ino=-1");
 #endif
 	return 0;
 }
@@ -111,7 +110,8 @@ static const struct super_operations autofs_sops = {
 };
 
 enum {Opt_err, Opt_fd, Opt_uid, Opt_gid, Opt_pgrp, Opt_minproto, Opt_maxproto,
-	Opt_indirect, Opt_direct, Opt_offset, Opt_strictexpire};
+	Opt_indirect, Opt_direct, Opt_offset, Opt_strictexpire,
+	Opt_ignore};
 
 static const match_table_t tokens = {
 	{Opt_fd, "fd=%u"},
@@ -124,6 +124,7 @@ static const match_table_t tokens = {
 	{Opt_direct, "direct"},
 	{Opt_offset, "offset"},
 	{Opt_strictexpire, "strictexpire"},
+	{Opt_ignore, "ignore"},
 	{Opt_err, NULL}
 };
 
@@ -206,6 +207,9 @@ static int parse_options(char *options,
 		case Opt_strictexpire:
 			sbi->flags |= AUTOFS_SBI_STRICTEXPIRE;
 			break;
+		case Opt_ignore:
+			sbi->flags |= AUTOFS_SBI_IGNORE;
+			break;
 		default:
 			return 1;
 		}
diff --git a/fs/autofs/root.c b/fs/autofs/root.c
index 1246f396bf0e..e646569c75ed 100644
--- a/fs/autofs/root.c
+++ b/fs/autofs/root.c
@@ -1,11 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
  * Copyright 1999-2000 Jeremy Fitzhardinge <jeremy@goop.org>
  * Copyright 2001-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
  */
 
 #include <linux/capability.h>
diff --git a/fs/autofs/symlink.c b/fs/autofs/symlink.c
index aad3902c0cc1..7ac67dc76039 100644
--- a/fs/autofs/symlink.c
+++ b/fs/autofs/symlink.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
  */
 
 #include "autofs_i.h"
diff --git a/fs/autofs/waitq.c b/fs/autofs/waitq.c
index 15a3e31d0904..b04c528b19d3 100644
--- a/fs/autofs/waitq.c
+++ b/fs/autofs/waitq.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Copyright 1997-1998 Transmeta Corporation -- All Rights Reserved
  * Copyright 2001-2006 Ian Kent <raven@themaw.net>
- *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
  */
 
 #include <linux/sched/signal.h>
diff --git a/fs/befs/Kconfig b/fs/befs/Kconfig
index edc5cc2aefad..9550b6462b81 100644
--- a/fs/befs/Kconfig
+++ b/fs/befs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config BEFS_FS
 	tristate "BeOS file system (BeFS) support (read only)"
 	depends on BLOCK
diff --git a/fs/befs/Makefile b/fs/befs/Makefile
index 8b9f66642a83..6c9c3cbc556e 100644
--- a/fs/befs/Makefile
+++ b/fs/befs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux BeOS filesystem routines.
 #
diff --git a/fs/befs/linuxvfs.c b/fs/befs/linuxvfs.c
index 4700b4534439..462d096ff3e9 100644
--- a/fs/befs/linuxvfs.c
+++ b/fs/befs/linuxvfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/befs/linuxvfs.c
  *
@@ -44,7 +45,7 @@ static struct dentry *befs_lookup(struct inode *, struct dentry *,
 				  unsigned int);
 static struct inode *befs_iget(struct super_block *, unsigned long);
 static struct inode *befs_alloc_inode(struct super_block *sb);
-static void befs_destroy_inode(struct inode *inode);
+static void befs_free_inode(struct inode *inode);
 static void befs_destroy_inodecache(void);
 static int befs_symlink_readpage(struct file *, struct page *);
 static int befs_utf2nls(struct super_block *sb, const char *in, int in_len,
@@ -64,7 +65,7 @@ static struct dentry *befs_get_parent(struct dentry *child);
 
 static const struct super_operations befs_sops = {
 	.alloc_inode	= befs_alloc_inode,	/* allocate a new inode */
-	.destroy_inode	= befs_destroy_inode, /* deallocate an inode */
+	.free_inode	= befs_free_inode, /* deallocate an inode */
 	.put_super	= befs_put_super,	/* uninit super */
 	.statfs		= befs_statfs,	/* statfs */
 	.remount_fs	= befs_remount,
@@ -281,17 +282,11 @@ befs_alloc_inode(struct super_block *sb)
 	return &bi->vfs_inode;
 }
 
-static void befs_i_callback(struct rcu_head *head)
+static void befs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(befs_inode_cachep, BEFS_I(inode));
 }
 
-static void befs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, befs_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct befs_inode_info *bi = (struct befs_inode_info *) foo;
diff --git a/fs/bfs/Kconfig b/fs/bfs/Kconfig
index 3728a6479c64..3e1247f07913 100644
--- a/fs/bfs/Kconfig
+++ b/fs/bfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config BFS_FS
 	tristate "BFS file system support"
 	depends on BLOCK
diff --git a/fs/bfs/Makefile b/fs/bfs/Makefile
index c787b36d940c..2b6bc5eb4de9 100644
--- a/fs/bfs/Makefile
+++ b/fs/bfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for BFS filesystem.
 #
diff --git a/fs/bfs/inode.c b/fs/bfs/inode.c
index d136b2aaafb3..5e97bed073d7 100644
--- a/fs/bfs/inode.c
+++ b/fs/bfs/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *	fs/bfs/inode.c
  *	BFS superblock and inode operations.
@@ -245,17 +246,11 @@ static struct inode *bfs_alloc_inode(struct super_block *sb)
 	return &bi->vfs_inode;
 }
 
-static void bfs_i_callback(struct rcu_head *head)
+static void bfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(bfs_inode_cachep, BFS_I(inode));
 }
 
-static void bfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, bfs_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct bfs_inode_info *bi = foo;
@@ -287,7 +282,7 @@ static void destroy_inodecache(void)
 
 static const struct super_operations bfs_sops = {
 	.alloc_inode	= bfs_alloc_inode,
-	.destroy_inode	= bfs_destroy_inode,
+	.free_inode	= bfs_free_inode,
 	.write_inode	= bfs_write_inode,
 	.evict_inode	= bfs_evict_inode,
 	.put_super	= bfs_put_super,
diff --git a/fs/binfmt_aout.c b/fs/binfmt_aout.c
index ca9725f18e00..8e8346a81723 100644
--- a/fs/binfmt_aout.c
+++ b/fs/binfmt_aout.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/binfmt_aout.c
  *
@@ -29,97 +30,14 @@
 
 #include <linux/uaccess.h>
 #include <asm/cacheflush.h>
-#include <asm/a.out-core.h>
 
 static int load_aout_binary(struct linux_binprm *);
 static int load_aout_library(struct file*);
 
-#ifdef CONFIG_COREDUMP
-/*
- * Routine writes a core dump image in the current directory.
- * Currently only a stub-function.
- *
- * Note that setuid/setgid files won't make a core-dump if the uid/gid
- * changed due to the set[u|g]id. It's enforced by the "current->mm->dumpable"
- * field, which also makes sure the core-dumps won't be recursive if the
- * dumping of the process results in another error..
- */
-static int aout_core_dump(struct coredump_params *cprm)
-{
-	mm_segment_t fs;
-	int has_dumped = 0;
-	void __user *dump_start;
-	int dump_size;
-	struct user dump;
-#ifdef __alpha__
-#       define START_DATA(u)	((void __user *)u.start_data)
-#else
-#	define START_DATA(u)	((void __user *)((u.u_tsize << PAGE_SHIFT) + \
-				 u.start_code))
-#endif
-#       define START_STACK(u)   ((void __user *)u.start_stack)
-
-	fs = get_fs();
-	set_fs(KERNEL_DS);
-	has_dumped = 1;
-       	strncpy(dump.u_comm, current->comm, sizeof(dump.u_comm));
-	dump.u_ar0 = offsetof(struct user, regs);
-	dump.signal = cprm->siginfo->si_signo;
-	aout_dump_thread(cprm->regs, &dump);
-
-/* If the size of the dump file exceeds the rlimit, then see what would happen
-   if we wrote the stack, but not the data area.  */
-	if ((dump.u_dsize + dump.u_ssize+1) * PAGE_SIZE > cprm->limit)
-		dump.u_dsize = 0;
-
-/* Make sure we have enough room to write the stack and data areas. */
-	if ((dump.u_ssize + 1) * PAGE_SIZE > cprm->limit)
-		dump.u_ssize = 0;
-
-/* make sure we actually have a data and stack area to dump */
-	set_fs(USER_DS);
-	if (!access_ok(START_DATA(dump), dump.u_dsize << PAGE_SHIFT))
-		dump.u_dsize = 0;
-	if (!access_ok(START_STACK(dump), dump.u_ssize << PAGE_SHIFT))
-		dump.u_ssize = 0;
-
-	set_fs(KERNEL_DS);
-/* struct user */
-	if (!dump_emit(cprm, &dump, sizeof(dump)))
-		goto end_coredump;
-/* Now dump all of the user data.  Include malloced stuff as well */
-	if (!dump_skip(cprm, PAGE_SIZE - sizeof(dump)))
-		goto end_coredump;
-/* now we start writing out the user space info */
-	set_fs(USER_DS);
-/* Dump the data area */
-	if (dump.u_dsize != 0) {
-		dump_start = START_DATA(dump);
-		dump_size = dump.u_dsize << PAGE_SHIFT;
-		if (!dump_emit(cprm, dump_start, dump_size))
-			goto end_coredump;
-	}
-/* Now prepare to dump the stack area */
-	if (dump.u_ssize != 0) {
-		dump_start = START_STACK(dump);
-		dump_size = dump.u_ssize << PAGE_SHIFT;
-		if (!dump_emit(cprm, dump_start, dump_size))
-			goto end_coredump;
-	}
-end_coredump:
-	set_fs(fs);
-	return has_dumped;
-}
-#else
-#define aout_core_dump NULL
-#endif
-
 static struct linux_binfmt aout_format = {
 	.module		= THIS_MODULE,
 	.load_binary	= load_aout_binary,
 	.load_shlib	= load_aout_library,
-	.core_dump	= aout_core_dump,
-	.min_coredump	= PAGE_SIZE
 };
 
 #define BAD_ADDR(x)	((unsigned long)(x) >= TASK_SIZE)
diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c
index 54207327f98f..8264b468f283 100644
--- a/fs/binfmt_elf.c
+++ b/fs/binfmt_elf.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/binfmt_elf.c
  *
@@ -57,8 +58,6 @@
 #endif
 
 static int load_elf_binary(struct linux_binprm *bprm);
-static unsigned long elf_map(struct file *, unsigned long, struct elf_phdr *,
-				int, int, unsigned long);
 
 #ifdef CONFIG_USELIB
 static int load_elf_library(struct file *);
@@ -347,7 +346,7 @@ create_elf_tables(struct linux_binprm *bprm, struct elfhdr *exec,
 #ifndef elf_map
 
 static unsigned long elf_map(struct file *filep, unsigned long addr,
-		struct elf_phdr *eppnt, int prot, int type,
+		const struct elf_phdr *eppnt, int prot, int type,
 		unsigned long total_size)
 {
 	unsigned long map_addr;
@@ -387,7 +386,7 @@ static unsigned long elf_map(struct file *filep, unsigned long addr,
 
 #endif /* !elf_map */
 
-static unsigned long total_mapping_size(struct elf_phdr *cmds, int nr)
+static unsigned long total_mapping_size(const struct elf_phdr *cmds, int nr)
 {
 	int i, first_idx = -1, last_idx = -1;
 
@@ -414,12 +413,13 @@ static unsigned long total_mapping_size(struct elf_phdr *cmds, int nr)
  * header pointed to by elf_ex, into a newly allocated array. The caller is
  * responsible for freeing the allocated data. Returns an ERR_PTR upon failure.
  */
-static struct elf_phdr *load_elf_phdrs(struct elfhdr *elf_ex,
+static struct elf_phdr *load_elf_phdrs(const struct elfhdr *elf_ex,
 				       struct file *elf_file)
 {
 	struct elf_phdr *elf_phdata = NULL;
-	int retval, size, err = -1;
+	int retval, err = -1;
 	loff_t pos = elf_ex->e_phoff;
+	unsigned int size;
 
 	/*
 	 * If the size of this structure has changed, then punt, since
@@ -429,13 +429,9 @@ static struct elf_phdr *load_elf_phdrs(struct elfhdr *elf_ex,
 		goto out;
 
 	/* Sanity check the number of program headers... */
-	if (elf_ex->e_phnum < 1 ||
-		elf_ex->e_phnum > 65536U / sizeof(struct elf_phdr))
-		goto out;
-
 	/* ...and their total size. */
 	size = sizeof(struct elf_phdr) * elf_ex->e_phnum;
-	if (size > ELF_MIN_ALIGN)
+	if (size == 0 || size > 65536 || size > ELF_MIN_ALIGN)
 		goto out;
 
 	elf_phdata = kmalloc(size, GFP_KERNEL);
@@ -529,6 +525,19 @@ static inline int arch_check_elf(struct elfhdr *ehdr, bool has_interp,
 
 #endif /* !CONFIG_ARCH_BINFMT_ELF_STATE */
 
+static inline int make_prot(u32 p_flags)
+{
+	int prot = 0;
+
+	if (p_flags & PF_R)
+		prot |= PROT_READ;
+	if (p_flags & PF_W)
+		prot |= PROT_WRITE;
+	if (p_flags & PF_X)
+		prot |= PROT_EXEC;
+	return prot;
+}
+
 /* This is much more generalized than the library routine read function,
    so we keep this separate.  Technically the library read function
    is only provided so that we can read a.out libraries that have
@@ -568,16 +577,10 @@ static unsigned long load_elf_interp(struct elfhdr *interp_elf_ex,
 	for (i = 0; i < interp_elf_ex->e_phnum; i++, eppnt++) {
 		if (eppnt->p_type == PT_LOAD) {
 			int elf_type = MAP_PRIVATE | MAP_DENYWRITE;
-			int elf_prot = 0;
+			int elf_prot = make_prot(eppnt->p_flags);
 			unsigned long vaddr = 0;
 			unsigned long k, map_addr;
 
-			if (eppnt->p_flags & PF_R)
-		    		elf_prot = PROT_READ;
-			if (eppnt->p_flags & PF_W)
-				elf_prot |= PROT_WRITE;
-			if (eppnt->p_flags & PF_X)
-				elf_prot |= PROT_EXEC;
 			vaddr = eppnt->p_vaddr;
 			if (interp_elf_ex->e_type == ET_EXEC || load_addr_set)
 				elf_type |= MAP_FIXED_NOREPLACE;
@@ -692,7 +695,6 @@ static int load_elf_binary(struct linux_binprm *bprm)
 	struct file *interpreter = NULL; /* to shut gcc up */
  	unsigned long load_addr = 0, load_bias = 0;
 	int load_addr_set = 0;
-	char * elf_interpreter = NULL;
 	unsigned long error;
 	struct elf_phdr *elf_ppnt, *elf_phdata, *interp_elf_phdata = NULL;
 	unsigned long elf_bss, elf_brk;
@@ -703,13 +705,12 @@ static int load_elf_binary(struct linux_binprm *bprm)
 	unsigned long start_code, end_code, start_data, end_data;
 	unsigned long reloc_func_desc __maybe_unused = 0;
 	int executable_stack = EXSTACK_DEFAULT;
-	struct pt_regs *regs = current_pt_regs();
 	struct {
 		struct elfhdr elf_ex;
 		struct elfhdr interp_elf_ex;
 	} *loc;
 	struct arch_elf_state arch_state = INIT_ARCH_ELF_STATE;
-	loff_t pos;
+	struct pt_regs *regs;
 
 	loc = kmalloc(sizeof(*loc), GFP_KERNEL);
 	if (!loc) {
@@ -739,69 +740,66 @@ static int load_elf_binary(struct linux_binprm *bprm)
 		goto out;
 
 	elf_ppnt = elf_phdata;
-	elf_bss = 0;
-	elf_brk = 0;
+	for (i = 0; i < loc->elf_ex.e_phnum; i++, elf_ppnt++) {
+		char *elf_interpreter;
+		loff_t pos;
 
-	start_code = ~0UL;
-	end_code = 0;
-	start_data = 0;
-	end_data = 0;
+		if (elf_ppnt->p_type != PT_INTERP)
+			continue;
 
-	for (i = 0; i < loc->elf_ex.e_phnum; i++) {
-		if (elf_ppnt->p_type == PT_INTERP) {
-			/* This is the program interpreter used for
-			 * shared libraries - for now assume that this
-			 * is an a.out format binary
-			 */
-			retval = -ENOEXEC;
-			if (elf_ppnt->p_filesz > PATH_MAX || 
-			    elf_ppnt->p_filesz < 2)
-				goto out_free_ph;
-
-			retval = -ENOMEM;
-			elf_interpreter = kmalloc(elf_ppnt->p_filesz,
-						  GFP_KERNEL);
-			if (!elf_interpreter)
-				goto out_free_ph;
-
-			pos = elf_ppnt->p_offset;
-			retval = kernel_read(bprm->file, elf_interpreter,
-					     elf_ppnt->p_filesz, &pos);
-			if (retval != elf_ppnt->p_filesz) {
-				if (retval >= 0)
-					retval = -EIO;
-				goto out_free_interp;
-			}
-			/* make sure path is NULL terminated */
-			retval = -ENOEXEC;
-			if (elf_interpreter[elf_ppnt->p_filesz - 1] != '\0')
-				goto out_free_interp;
+		/*
+		 * This is the program interpreter used for shared libraries -
+		 * for now assume that this is an a.out format binary.
+		 */
+		retval = -ENOEXEC;
+		if (elf_ppnt->p_filesz > PATH_MAX || elf_ppnt->p_filesz < 2)
+			goto out_free_ph;
 
-			interpreter = open_exec(elf_interpreter);
-			retval = PTR_ERR(interpreter);
-			if (IS_ERR(interpreter))
-				goto out_free_interp;
+		retval = -ENOMEM;
+		elf_interpreter = kmalloc(elf_ppnt->p_filesz, GFP_KERNEL);
+		if (!elf_interpreter)
+			goto out_free_ph;
 
-			/*
-			 * If the binary is not readable then enforce
-			 * mm->dumpable = 0 regardless of the interpreter's
-			 * permissions.
-			 */
-			would_dump(bprm, interpreter);
-
-			/* Get the exec headers */
-			pos = 0;
-			retval = kernel_read(interpreter, &loc->interp_elf_ex,
-					     sizeof(loc->interp_elf_ex), &pos);
-			if (retval != sizeof(loc->interp_elf_ex)) {
-				if (retval >= 0)
-					retval = -EIO;
-				goto out_free_dentry;
-			}
+		pos = elf_ppnt->p_offset;
+		retval = kernel_read(bprm->file, elf_interpreter,
+				     elf_ppnt->p_filesz, &pos);
+		if (retval != elf_ppnt->p_filesz) {
+			if (retval >= 0)
+				retval = -EIO;
+			goto out_free_interp;
+		}
+		/* make sure path is NULL terminated */
+		retval = -ENOEXEC;
+		if (elf_interpreter[elf_ppnt->p_filesz - 1] != '\0')
+			goto out_free_interp;
 
-			break;
+		interpreter = open_exec(elf_interpreter);
+		kfree(elf_interpreter);
+		retval = PTR_ERR(interpreter);
+		if (IS_ERR(interpreter))
+			goto out_free_ph;
+
+		/*
+		 * If the binary is not readable then enforce mm->dumpable = 0
+		 * regardless of the interpreter's permissions.
+		 */
+		would_dump(bprm, interpreter);
+
+		/* Get the exec headers */
+		pos = 0;
+		retval = kernel_read(interpreter, &loc->interp_elf_ex,
+				     sizeof(loc->interp_elf_ex), &pos);
+		if (retval != sizeof(loc->interp_elf_ex)) {
+			if (retval >= 0)
+				retval = -EIO;
+			goto out_free_dentry;
 		}
-		elf_ppnt++;
+
+		break;
+
+out_free_interp:
+		kfree(elf_interpreter);
+		goto out_free_ph;
 	}
 
 	elf_ppnt = elf_phdata;
@@ -824,7 +822,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
 		}
 
 	/* Some simple consistency checks for the interpreter */
-	if (elf_interpreter) {
+	if (interpreter) {
 		retval = -ELIBBAD;
 		/* Not an ELF interpreter */
 		if (memcmp(loc->interp_elf_ex.e_ident, ELFMAG, SELFMAG) != 0)
@@ -889,13 +887,19 @@ static int load_elf_binary(struct linux_binprm *bprm)
 	if (retval < 0)
 		goto out_free_dentry;
 	
-	current->mm->start_stack = bprm->p;
+	elf_bss = 0;
+	elf_brk = 0;
+
+	start_code = ~0UL;
+	end_code = 0;
+	start_data = 0;
+	end_data = 0;
 
 	/* Now we do a little grungy work by mmapping the ELF image into
 	   the correct location in memory. */
 	for(i = 0, elf_ppnt = elf_phdata;
 	    i < loc->elf_ex.e_phnum; i++, elf_ppnt++) {
-		int elf_prot = 0, elf_flags, elf_fixed = MAP_FIXED_NOREPLACE;
+		int elf_prot, elf_flags, elf_fixed = MAP_FIXED_NOREPLACE;
 		unsigned long k, vaddr;
 		unsigned long total_size = 0;
 
@@ -936,12 +940,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
 			elf_fixed = MAP_FIXED;
 		}
 
-		if (elf_ppnt->p_flags & PF_R)
-			elf_prot |= PROT_READ;
-		if (elf_ppnt->p_flags & PF_W)
-			elf_prot |= PROT_WRITE;
-		if (elf_ppnt->p_flags & PF_X)
-			elf_prot |= PROT_EXEC;
+		elf_prot = make_prot(elf_ppnt->p_flags);
 
 		elf_flags = MAP_PRIVATE | MAP_DENYWRITE | MAP_EXECUTABLE;
 
@@ -983,7 +982,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
 			 * independently randomized mmap region (0 load_bias
 			 * without MAP_FIXED).
 			 */
-			if (elf_interpreter) {
+			if (interpreter) {
 				load_bias = ELF_ET_DYN_BASE;
 				if (current->flags & PF_RANDOMIZE)
 					load_bias += arch_mmap_rnd();
@@ -1081,7 +1080,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
 		goto out_free_dentry;
 	}
 
-	if (elf_interpreter) {
+	if (interpreter) {
 		unsigned long interp_map_addr = 0;
 
 		elf_entry = load_elf_interp(&loc->interp_elf_ex,
@@ -1105,7 +1104,6 @@ static int load_elf_binary(struct linux_binprm *bprm)
 
 		allow_write_access(interpreter);
 		fput(interpreter);
-		kfree(elf_interpreter);
 	} else {
 		elf_entry = loc->elf_ex.e_entry;
 		if (BAD_ADDR(elf_entry)) {
@@ -1120,7 +1118,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
 	set_binfmt(&elf_format);
 
 #ifdef ARCH_HAS_SETUP_ADDITIONAL_PAGES
-	retval = arch_setup_additional_pages(bprm, !!elf_interpreter);
+	retval = arch_setup_additional_pages(bprm, !!interpreter);
 	if (retval < 0)
 		goto out;
 #endif /* ARCH_HAS_SETUP_ADDITIONAL_PAGES */
@@ -1137,6 +1135,17 @@ static int load_elf_binary(struct linux_binprm *bprm)
 	current->mm->start_stack = bprm->p;
 
 	if ((current->flags & PF_RANDOMIZE) && (randomize_va_space > 1)) {
+		/*
+		 * For architectures with ELF randomization, when executing
+		 * a loader directly (i.e. no interpreter listed in ELF
+		 * headers), move the brk area out of the mmap region
+		 * (since it grows up, and may collide early with the stack
+		 * growing down), and into the unused ELF_ET_DYN_BASE region.
+		 */
+		if (IS_ENABLED(CONFIG_ARCH_HAS_ELF_RANDOMIZE) && !interpreter)
+			current->mm->brk = current->mm->start_brk =
+				ELF_ET_DYN_BASE;
+
 		current->mm->brk = current->mm->start_brk =
 			arch_randomize_brk(current->mm);
 #ifdef compat_brk_randomized
@@ -1153,6 +1162,7 @@ static int load_elf_binary(struct linux_binprm *bprm)
 				MAP_FIXED | MAP_PRIVATE, 0);
 	}
 
+	regs = current_pt_regs();
 #ifdef ELF_PLAT_INIT
 	/*
 	 * The ABI may specify that certain registers be set up in special
@@ -1181,8 +1191,6 @@ out_free_dentry:
 	allow_write_access(interpreter);
 	if (interpreter)
 		fput(interpreter);
-out_free_interp:
-	kfree(elf_interpreter);
 out_free_ph:
 	kfree(elf_phdata);
 	goto out;
@@ -1461,8 +1469,6 @@ static void fill_elf_header(struct elfhdr *elf, int segs,
 	elf->e_ehsize = sizeof(struct elfhdr);
 	elf->e_phentsize = sizeof(struct elf_phdr);
 	elf->e_phnum = segs;
-
-	return;
 }
 
 static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, loff_t offset)
@@ -1475,7 +1481,6 @@ static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, loff_t offset)
 	phdr->p_memsz = 0;
 	phdr->p_flags = 0;
 	phdr->p_align = 0;
-	return;
 }
 
 static void fill_note(struct memelfnote *note, const char *name, int type, 
@@ -1485,7 +1490,6 @@ static void fill_note(struct memelfnote *note, const char *name, int type,
 	note->type = type;
 	note->datasz = sz;
 	note->data = data;
-	return;
 }
 
 /*
@@ -2033,7 +2037,6 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
 			  struct elf_note_info *info,
 			  const kernel_siginfo_t *siginfo, struct pt_regs *regs)
 {
-	struct list_head *t;
 	struct core_thread *ct;
 	struct elf_thread_status *ets;
 
@@ -2050,10 +2053,9 @@ static int fill_note_info(struct elfhdr *elf, int phdrs,
 		list_add(&ets->list, &info->thread_list);
 	}
 
-	list_for_each(t, &info->thread_list) {
+	list_for_each_entry(ets, &info->thread_list, list) {
 		int sz;
 
-		ets = list_entry(t, struct elf_thread_status, list);
 		sz = elf_dump_thread_status(siginfo->si_signo, ets);
 		info->thread_status_size += sz;
 	}
@@ -2117,20 +2119,17 @@ static size_t get_note_info_size(struct elf_note_info *info)
 static int write_note_info(struct elf_note_info *info,
 			   struct coredump_params *cprm)
 {
+	struct elf_thread_status *ets;
 	int i;
-	struct list_head *t;
 
 	for (i = 0; i < info->numnote; i++)
 		if (!writenote(info->notes + i, cprm))
 			return 0;
 
 	/* write out the thread status notes section */
-	list_for_each(t, &info->thread_list) {
-		struct elf_thread_status *tmp =
-				list_entry(t, struct elf_thread_status, list);
-
-		for (i = 0; i < tmp->num_notes; i++)
-			if (!writenote(&tmp->notes[i], cprm))
+	list_for_each_entry(ets, &info->thread_list, list) {
+		for (i = 0; i < ets->num_notes; i++)
+			if (!writenote(&ets->notes[i], cprm))
 				return 0;
 	}
 
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index b53bb3729ac1..d86ebd0dcc3d 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* binfmt_elf_fdpic.c: FDPIC ELF binary format
  *
  * Copyright (C) 2003, 2004, 2006 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
  * Derived from binfmt_elf.c
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/fs/binfmt_em86.c b/fs/binfmt_em86.c
index dd2d3f0cd55d..466497860c62 100644
--- a/fs/binfmt_em86.c
+++ b/fs/binfmt_em86.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/binfmt_em86.c
  *
diff --git a/fs/binfmt_flat.c b/fs/binfmt_flat.c
index 82a48e830018..8c6b50f34466 100644
--- a/fs/binfmt_flat.c
+++ b/fs/binfmt_flat.c
@@ -42,6 +42,11 @@
 #include <asm/unaligned.h>
 #include <asm/cacheflush.h>
 #include <asm/page.h>
+#include <asm/flat.h>
+
+#ifndef flat_get_relocate_addr
+#define flat_get_relocate_addr(rel)	(rel)
+#endif
 
 /****************************************************************************/
 
@@ -63,6 +68,12 @@
 #define RELOC_FAILED 0xff00ff01		/* Relocation incorrect somewhere */
 #define UNLOADED_LIB 0x7ff000ff		/* Placeholder for unused library */
 
+#ifdef CONFIG_BINFMT_SHARED_FLAT
+#define	MAX_SHARED_LIBS			(4)
+#else
+#define	MAX_SHARED_LIBS			(1)
+#endif
+
 struct lib_info {
 	struct {
 		unsigned long start_code;		/* Start of text segment */
@@ -120,14 +131,15 @@ static int create_flat_tables(struct linux_binprm *bprm, unsigned long arg_start
 
 	sp -= bprm->envc + 1;
 	sp -= bprm->argc + 1;
-	sp -= flat_argvp_envp_on_stack() ? 2 : 0;
+	if (IS_ENABLED(CONFIG_BINFMT_FLAT_ARGVP_ENVP_ON_STACK))
+		sp -= 2; /* argvp + envp */
 	sp -= 1;  /* &argc */
 
 	current->mm->start_stack = (unsigned long)sp & -FLAT_STACK_ALIGN;
 	sp = (unsigned long __user *)current->mm->start_stack;
 
 	__put_user(bprm->argc, sp++);
-	if (flat_argvp_envp_on_stack()) {
+	if (IS_ENABLED(CONFIG_BINFMT_FLAT_ARGVP_ENVP_ON_STACK)) {
 		unsigned long argv, envp;
 		argv = (unsigned long)(sp + 2);
 		envp = (unsigned long)(sp + 2 + bprm->argc + 1);
@@ -345,7 +357,7 @@ calc_reloc(unsigned long r, struct lib_info *p, int curid, int internalp)
 	start_code = p->lib_list[id].start_code;
 	text_len = p->lib_list[id].text_len;
 
-	if (!flat_reloc_valid(r, start_brk - start_data + text_len)) {
+	if (r > start_brk - start_data + text_len) {
 		pr_err("reloc outside program 0x%lx (0 - 0x%lx/0x%lx)",
 		       r, start_brk-start_data+text_len, text_len);
 		goto failed;
@@ -368,6 +380,7 @@ failed:
 
 /****************************************************************************/
 
+#ifdef CONFIG_BINFMT_FLAT_OLD
 static void old_reloc(unsigned long rl)
 {
 	static const char *segment[] = { "TEXT", "DATA", "BSS", "*UNKNOWN*" };
@@ -405,6 +418,7 @@ static void old_reloc(unsigned long rl)
 
 	pr_debug("Relocation became %lx\n", val);
 }
+#endif /* CONFIG_BINFMT_FLAT_OLD */
 
 /****************************************************************************/
 
@@ -415,7 +429,8 @@ static int load_flat_file(struct linux_binprm *bprm,
 	unsigned long textpos, datapos, realdatastart;
 	u32 text_len, data_len, bss_len, stack_len, full_data, flags;
 	unsigned long len, memp, memp_size, extra, rlim;
-	u32 __user *reloc, *rp;
+	__be32 __user *reloc;
+	u32 __user *rp;
 	struct inode *inode;
 	int i, rev, relocs;
 	loff_t fpos;
@@ -454,6 +469,7 @@ static int load_flat_file(struct linux_binprm *bprm,
 	if (flags & FLAT_FLAG_KTRACE)
 		pr_info("Loading file: %s\n", bprm->filename);
 
+#ifdef CONFIG_BINFMT_FLAT_OLD
 	if (rev != FLAT_VERSION && rev != OLD_FLAT_VERSION) {
 		pr_err("bad flat file version 0x%x (supported 0x%lx and 0x%lx)\n",
 		       rev, FLAT_VERSION, OLD_FLAT_VERSION);
@@ -470,6 +486,23 @@ static int load_flat_file(struct linux_binprm *bprm,
 	}
 
 	/*
+	 * fix up the flags for the older format,  there were all kinds
+	 * of endian hacks,  this only works for the simple cases
+	 */
+	if (rev == OLD_FLAT_VERSION &&
+	   (flags || IS_ENABLED(CONFIG_BINFMT_FLAT_OLD_ALWAYS_RAM)))
+		flags = FLAT_FLAG_RAM;
+
+#else /* CONFIG_BINFMT_FLAT_OLD */
+	if (rev != FLAT_VERSION) {
+		pr_err("bad flat file version 0x%x (supported 0x%lx)\n",
+		       rev, FLAT_VERSION);
+		ret = -ENOEXEC;
+		goto err;
+	}
+#endif /* !CONFIG_BINFMT_FLAT_OLD */
+
+	/*
 	 * Make sure the header params are sane.
 	 * 28 bits (256 MB) is way more than reasonable in this case.
 	 * If some top bits are set we have probable binary corruption.
@@ -480,13 +513,6 @@ static int load_flat_file(struct linux_binprm *bprm,
 		goto err;
 	}
 
-	/*
-	 * fix up the flags for the older format,  there were all kinds
-	 * of endian hacks,  this only works for the simple cases
-	 */
-	if (rev == OLD_FLAT_VERSION && flat_old_ram_flag(flags))
-		flags = FLAT_FLAG_RAM;
-
 #ifndef CONFIG_BINFMT_ZFLAT
 	if (flags & (FLAT_FLAG_GZIP|FLAT_FLAG_GZDATA)) {
 		pr_err("Support for ZFLAT executables is not enabled.\n");
@@ -547,7 +573,7 @@ static int load_flat_file(struct linux_binprm *bprm,
 			goto err;
 		}
 
-		len = data_len + extra + MAX_SHARED_LIBS * sizeof(unsigned long);
+		len = data_len + extra;
 		len = PAGE_ALIGN(len);
 		realdatastart = vm_mmap(NULL, 0, len,
 			PROT_READ|PROT_WRITE|PROT_EXEC, MAP_PRIVATE, 0);
@@ -561,9 +587,7 @@ static int load_flat_file(struct linux_binprm *bprm,
 			vm_munmap(textpos, text_len);
 			goto err;
 		}
-		datapos = ALIGN(realdatastart +
-				MAX_SHARED_LIBS * sizeof(unsigned long),
-				FLAT_DATA_ALIGN);
+		datapos = ALIGN(realdatastart, FLAT_DATA_ALIGN);
 
 		pr_debug("Allocated data+bss+stack (%u bytes): %lx\n",
 			 data_len + bss_len + stack_len, datapos);
@@ -587,13 +611,13 @@ static int load_flat_file(struct linux_binprm *bprm,
 			goto err;
 		}
 
-		reloc = (u32 __user *)
+		reloc = (__be32 __user *)
 			(datapos + (ntohl(hdr->reloc_start) - text_len));
 		memp = realdatastart;
 		memp_size = len;
 	} else {
 
-		len = text_len + data_len + extra + MAX_SHARED_LIBS * sizeof(u32);
+		len = text_len + data_len + extra;
 		len = PAGE_ALIGN(len);
 		textpos = vm_mmap(NULL, 0, len,
 			PROT_READ | PROT_EXEC | PROT_WRITE, MAP_PRIVATE, 0);
@@ -608,11 +632,9 @@ static int load_flat_file(struct linux_binprm *bprm,
 		}
 
 		realdatastart = textpos + ntohl(hdr->data_start);
-		datapos = ALIGN(realdatastart +
-				MAX_SHARED_LIBS * sizeof(u32),
-				FLAT_DATA_ALIGN);
+		datapos = ALIGN(realdatastart, FLAT_DATA_ALIGN);
 
-		reloc = (u32 __user *)
+		reloc = (__be32 __user *)
 			(datapos + (ntohl(hdr->reloc_start) - text_len));
 		memp = textpos;
 		memp_size = len;
@@ -627,8 +649,9 @@ static int load_flat_file(struct linux_binprm *bprm,
 					 (text_len + full_data
 						  - sizeof(struct flat_hdr)),
 					 0);
-			memmove((void *) datapos, (void *) realdatastart,
-					full_data);
+			if (datapos != realdatastart)
+				memmove((void *)datapos, (void *)realdatastart,
+						full_data);
 #else
 			/*
 			 * This is used on MMU systems mainly for testing.
@@ -684,8 +707,7 @@ static int load_flat_file(struct linux_binprm *bprm,
 		if (IS_ERR_VALUE(result)) {
 			ret = result;
 			pr_err("Unable to read code+data+bss, errno %d\n", ret);
-			vm_munmap(textpos, text_len + data_len + extra +
-				MAX_SHARED_LIBS * sizeof(u32));
+			vm_munmap(textpos, text_len + data_len + extra);
 			goto err;
 		}
 	}
@@ -775,20 +797,18 @@ static int load_flat_file(struct linux_binprm *bprm,
 	 * __start to address 4 so that is okay).
 	 */
 	if (rev > OLD_FLAT_VERSION) {
-		u32 __maybe_unused persistent = 0;
 		for (i = 0; i < relocs; i++) {
 			u32 addr, relval;
+			__be32 tmp;
 
 			/*
 			 * Get the address of the pointer to be
 			 * relocated (of course, the address has to be
 			 * relocated first).
 			 */
-			if (get_user(relval, reloc + i))
+			if (get_user(tmp, reloc + i))
 				return -EFAULT;
-			relval = ntohl(relval);
-			if (flat_set_persistent(relval, &persistent))
-				continue;
+			relval = ntohl(tmp);
 			addr = flat_get_relocate_addr(relval);
 			rp = (u32 __user *)calc_reloc(addr, libinfo, id, 1);
 			if (rp == (u32 __user *)RELOC_FAILED) {
@@ -797,8 +817,7 @@ static int load_flat_file(struct linux_binprm *bprm,
 			}
 
 			/* Get the pointer's value.  */
-			ret = flat_get_addr_from_rp(rp, relval, flags,
-							&addr, &persistent);
+			ret = flat_get_addr_from_rp(rp, relval, flags, &addr);
 			if (unlikely(ret))
 				goto err;
 
@@ -807,8 +826,13 @@ static int load_flat_file(struct linux_binprm *bprm,
 				 * Do the relocation.  PIC relocs in the data section are
 				 * already in target order
 				 */
-				if ((flags & FLAT_FLAG_GOTPIC) == 0)
-					addr = ntohl(addr);
+				if ((flags & FLAT_FLAG_GOTPIC) == 0) {
+					/*
+					 * Meh, the same value can have a different
+					 * byte order based on a flag..
+					 */
+					addr = ntohl((__force __be32)addr);
+				}
 				addr = calc_reloc(addr, libinfo, id, 0);
 				if (addr == RELOC_FAILED) {
 					ret = -ENOEXEC;
@@ -821,14 +845,15 @@ static int load_flat_file(struct linux_binprm *bprm,
 					goto err;
 			}
 		}
+#ifdef CONFIG_BINFMT_FLAT_OLD
 	} else {
 		for (i = 0; i < relocs; i++) {
-			u32 relval;
+			__be32 relval;
 			if (get_user(relval, reloc + i))
 				return -EFAULT;
-			relval = ntohl(relval);
-			old_reloc(relval);
+			old_reloc(ntohl(relval));
 		}
+#endif /* CONFIG_BINFMT_FLAT_OLD */
 	}
 
 	flush_icache_range(start_code, end_code);
@@ -856,9 +881,14 @@ err:
 
 static int load_flat_shared_library(int id, struct lib_info *libs)
 {
+	/*
+	 * This is a fake bprm struct; only the members "buf", "file" and
+	 * "filename" are actually used.
+	 */
 	struct linux_binprm bprm;
 	int res;
 	char buf[16];
+	loff_t pos = 0;
 
 	memset(&bprm, 0, sizeof(bprm));
 
@@ -872,25 +902,11 @@ static int load_flat_shared_library(int id, struct lib_info *libs)
 	if (IS_ERR(bprm.file))
 		return res;
 
-	bprm.cred = prepare_exec_creds();
-	res = -ENOMEM;
-	if (!bprm.cred)
-		goto out;
-
-	/* We don't really care about recalculating credentials at this point
-	 * as we're past the point of no return and are dealing with shared
-	 * libraries.
-	 */
-	bprm.called_set_creds = 1;
-
-	res = prepare_binprm(&bprm);
+	res = kernel_read(bprm.file, bprm.buf, BINPRM_BUF_SIZE, &pos);
 
-	if (!res)
+	if (res >= 0)
 		res = load_flat_file(&bprm, libs, id, NULL);
 
-	abort_creds(bprm.cred);
-
-out:
 	allow_write_access(bprm.file);
 	fput(bprm.file);
 
diff --git a/fs/binfmt_misc.c b/fs/binfmt_misc.c
index aa4a7a23ff99..b8e145552ec7 100644
--- a/fs/binfmt_misc.c
+++ b/fs/binfmt_misc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * binfmt_misc.c
  *
diff --git a/fs/binfmt_script.c b/fs/binfmt_script.c
index 7cde3f46ad26..e9e6a6f4a35f 100644
--- a/fs/binfmt_script.c
+++ b/fs/binfmt_script.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/binfmt_script.c
  *
@@ -14,13 +15,30 @@
 #include <linux/err.h>
 #include <linux/fs.h>
 
+static inline bool spacetab(char c) { return c == ' ' || c == '\t'; }
+static inline char *next_non_spacetab(char *first, const char *last)
+{
+	for (; first <= last; first++)
+		if (!spacetab(*first))
+			return first;
+	return NULL;
+}
+static inline char *next_terminator(char *first, const char *last)
+{
+	for (; first <= last; first++)
+		if (spacetab(*first) || !*first)
+			return first;
+	return NULL;
+}
+
 static int load_script(struct linux_binprm *bprm)
 {
 	const char *i_arg, *i_name;
-	char *cp;
+	char *cp, *buf_end;
 	struct file *file;
 	int retval;
 
+	/* Not ours to exec if we don't start with "#!". */
 	if ((bprm->buf[0] != '#') || (bprm->buf[1] != '!'))
 		return -ENOEXEC;
 
@@ -33,18 +51,40 @@ static int load_script(struct linux_binprm *bprm)
 	if (bprm->interp_flags & BINPRM_FLAGS_PATH_INACCESSIBLE)
 		return -ENOENT;
 
-	/*
-	 * This section does the #! interpretation.
-	 * Sorta complicated, but hopefully it will work.  -TYT
-	 */
-
+	/* Release since we are not mapping a binary into memory. */
 	allow_write_access(bprm->file);
 	fput(bprm->file);
 	bprm->file = NULL;
 
-	bprm->buf[BINPRM_BUF_SIZE - 1] = '\0';
-	if ((cp = strchr(bprm->buf, '\n')) == NULL)
-		cp = bprm->buf+BINPRM_BUF_SIZE-1;
+	/*
+	 * This section handles parsing the #! line into separate
+	 * interpreter path and argument strings. We must be careful
+	 * because bprm->buf is not yet guaranteed to be NUL-terminated
+	 * (though the buffer will have trailing NUL padding when the
+	 * file size was smaller than the buffer size).
+	 *
+	 * We do not want to exec a truncated interpreter path, so either
+	 * we find a newline (which indicates nothing is truncated), or
+	 * we find a space/tab/NUL after the interpreter path (which
+	 * itself may be preceded by spaces/tabs). Truncating the
+	 * arguments is fine: the interpreter can re-read the script to
+	 * parse them on its own.
+	 */
+	buf_end = bprm->buf + sizeof(bprm->buf) - 1;
+	cp = strnchr(bprm->buf, sizeof(bprm->buf), '\n');
+	if (!cp) {
+		cp = next_non_spacetab(bprm->buf + 2, buf_end);
+		if (!cp)
+			return -ENOEXEC; /* Entire buf is spaces/tabs */
+		/*
+		 * If there is no later space/tab/NUL we must assume the
+		 * interpreter path is truncated.
+		 */
+		if (!next_terminator(cp, buf_end))
+			return -ENOEXEC;
+		cp = buf_end;
+	}
+	/* NUL-terminate the buffer and any trailing spaces/tabs. */
 	*cp = '\0';
 	while (cp > bprm->buf) {
 		cp--;
diff --git a/fs/block_dev.c b/fs/block_dev.c
index 58a4c1217fa8..f00b569a9f89 100644
--- a/fs/block_dev.c
+++ b/fs/block_dev.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/block_dev.c
  *
@@ -29,8 +30,6 @@
 #include <linux/namei.h>
 #include <linux/log2.h>
 #include <linux/cleancache.h>
-#include <linux/dax.h>
-#include <linux/badblocks.h>
 #include <linux/task_io_accounting_ops.h>
 #include <linux/falloc.h>
 #include <linux/uaccess.h>
@@ -204,13 +203,12 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
 {
 	struct file *file = iocb->ki_filp;
 	struct block_device *bdev = I_BDEV(bdev_file_inode(file));
-	struct bio_vec inline_vecs[DIO_INLINE_BIO_VECS], *vecs, *bvec;
+	struct bio_vec inline_vecs[DIO_INLINE_BIO_VECS], *vecs;
 	loff_t pos = iocb->ki_pos;
 	bool should_dirty = false;
 	struct bio bio;
 	ssize_t ret;
 	blk_qc_t qc;
-	int i;
 
 	if ((pos | iov_iter_alignment(iter)) &
 	    (bdev_logical_block_size(bdev) - 1))
@@ -247,7 +245,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
 		task_io_account_write(ret);
 	}
 	if (iocb->ki_flags & IOCB_HIPRI)
-		bio.bi_opf |= REQ_HIPRI;
+		bio_set_polled(&bio, iocb);
 
 	qc = submit_bio(&bio);
 	for (;;) {
@@ -260,12 +258,7 @@ __blkdev_direct_IO_simple(struct kiocb *iocb, struct iov_iter *iter,
 	}
 	__set_current_state(TASK_RUNNING);
 
-	bio_for_each_segment_all(bvec, &bio, i) {
-		if (should_dirty && !PageCompound(bvec->bv_page))
-			set_page_dirty_lock(bvec->bv_page);
-		put_page(bvec->bv_page);
-	}
-
+	bio_release_pages(&bio, should_dirty);
 	if (unlikely(bio.bi_status))
 		ret = blk_status_to_errno(bio.bi_status);
 
@@ -293,15 +286,23 @@ struct blkdev_dio {
 
 static struct bio_set blkdev_dio_pool;
 
+static int blkdev_iopoll(struct kiocb *kiocb, bool wait)
+{
+	struct block_device *bdev = I_BDEV(kiocb->ki_filp->f_mapping->host);
+	struct request_queue *q = bdev_get_queue(bdev);
+
+	return blk_poll(q, READ_ONCE(kiocb->ki_cookie), wait);
+}
+
 static void blkdev_bio_end_io(struct bio *bio)
 {
 	struct blkdev_dio *dio = bio->bi_private;
 	bool should_dirty = dio->should_dirty;
 
-	if (dio->multi_bio && !atomic_dec_and_test(&dio->ref)) {
-		if (bio->bi_status && !dio->bio.bi_status)
-			dio->bio.bi_status = bio->bi_status;
-	} else {
+	if (bio->bi_status && !dio->bio.bi_status)
+		dio->bio.bi_status = bio->bi_status;
+
+	if (!dio->multi_bio || atomic_dec_and_test(&dio->ref)) {
 		if (!dio->is_sync) {
 			struct kiocb *iocb = dio->iocb;
 			ssize_t ret;
@@ -327,11 +328,7 @@ static void blkdev_bio_end_io(struct bio *bio)
 	if (should_dirty) {
 		bio_check_pages_dirty(bio);
 	} else {
-		struct bio_vec *bvec;
-		int i;
-
-		bio_for_each_segment_all(bvec, bio, i)
-			put_page(bvec->bv_page);
+		bio_release_pages(bio, false);
 		bio_put(bio);
 	}
 }
@@ -406,10 +403,17 @@ __blkdev_direct_IO(struct kiocb *iocb, struct iov_iter *iter, int nr_pages)
 
 		nr_pages = iov_iter_npages(iter, BIO_MAX_PAGES);
 		if (!nr_pages) {
-			if (iocb->ki_flags & IOCB_HIPRI)
-				bio->bi_opf |= REQ_HIPRI;
+			bool polled = false;
+
+			if (iocb->ki_flags & IOCB_HIPRI) {
+				bio_set_polled(bio, iocb);
+				polled = true;
+			}
 
 			qc = submit_bio(bio);
+
+			if (polled)
+				WRITE_ONCE(iocb->ki_cookie, qc);
 			break;
 		}
 
@@ -770,17 +774,9 @@ static struct inode *bdev_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void bdev_i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	struct bdev_inode *bdi = BDEV_I(inode);
-
-	kmem_cache_free(bdev_cachep, bdi);
-}
-
-static void bdev_destroy_inode(struct inode *inode)
+static void bdev_free_inode(struct inode *inode)
 {
-	call_rcu(&inode->i_rcu, bdev_i_callback);
+	kmem_cache_free(bdev_cachep, BDEV_I(inode));
 }
 
 static void init_once(void *foo)
@@ -820,7 +816,7 @@ static void bdev_evict_inode(struct inode *inode)
 static const struct super_operations bdev_sops = {
 	.statfs = simple_statfs,
 	.alloc_inode = bdev_alloc_inode,
-	.destroy_inode = bdev_destroy_inode,
+	.free_inode = bdev_free_inode,
 	.drop_inode = generic_delete_inode,
 	.evict_inode = bdev_evict_inode,
 };
@@ -1397,20 +1393,27 @@ void check_disk_size_change(struct gendisk *disk, struct block_device *bdev,
  */
 int revalidate_disk(struct gendisk *disk)
 {
-	struct block_device *bdev;
 	int ret = 0;
 
 	if (disk->fops->revalidate_disk)
 		ret = disk->fops->revalidate_disk(disk);
-	bdev = bdget_disk(disk, 0);
-	if (!bdev)
-		return ret;
 
-	mutex_lock(&bdev->bd_mutex);
-	check_disk_size_change(disk, bdev, ret == 0);
-	bdev->bd_invalidated = 0;
-	mutex_unlock(&bdev->bd_mutex);
-	bdput(bdev);
+	/*
+	 * Hidden disks don't have associated bdev so there's no point in
+	 * revalidating it.
+	 */
+	if (!(disk->flags & GENHD_FL_HIDDEN)) {
+		struct block_device *bdev = bdget_disk(disk, 0);
+
+		if (!bdev)
+			return ret;
+
+		mutex_lock(&bdev->bd_mutex);
+		check_disk_size_change(disk, bdev, ret == 0);
+		bdev->bd_invalidated = 0;
+		mutex_unlock(&bdev->bd_mutex);
+		bdput(bdev);
+	}
 	return ret;
 }
 EXPORT_SYMBOL(revalidate_disk);
@@ -2076,6 +2079,7 @@ const struct file_operations def_blk_fops = {
 	.llseek		= block_llseek,
 	.read_iter	= blkdev_read_iter,
 	.write_iter	= blkdev_write_iter,
+	.iopoll		= blkdev_iopoll,
 	.mmap		= generic_file_mmap,
 	.fsync		= blkdev_fsync,
 	.unlocked_ioctl	= block_ioctl,
diff --git a/fs/btrfs/acl.c b/fs/btrfs/acl.c
index 3b66c957ea6f..a0af1b952c4d 100644
--- a/fs/btrfs/acl.c
+++ b/fs/btrfs/acl.c
@@ -9,6 +9,7 @@
 #include <linux/posix_acl_xattr.h>
 #include <linux/posix_acl.h>
 #include <linux/sched.h>
+#include <linux/sched/mm.h>
 #include <linux/slab.h>
 
 #include "ctree.h"
@@ -72,8 +73,16 @@ static int __btrfs_set_acl(struct btrfs_trans_handle *trans,
 	}
 
 	if (acl) {
+		unsigned int nofs_flag;
+
 		size = posix_acl_xattr_size(acl->a_count);
+		/*
+		 * We're holding a transaction handle, so use a NOFS memory
+		 * allocation context to avoid deadlock if reclaim happens.
+		 */
+		nofs_flag = memalloc_nofs_save();
 		value = kmalloc(size, GFP_KERNEL);
+		memalloc_nofs_restore(nofs_flag);
 		if (!value) {
 			ret = -ENOMEM;
 			goto out;
@@ -84,7 +93,11 @@ static int __btrfs_set_acl(struct btrfs_trans_handle *trans,
 			goto out;
 	}
 
-	ret = btrfs_setxattr(trans, inode, name, value, size, 0);
+	if (trans)
+		ret = btrfs_setxattr(trans, inode, name, value, size, 0);
+	else
+		ret = btrfs_setxattr_trans(inode, name, value, size, 0);
+
 out:
 	kfree(value);
 
diff --git a/fs/btrfs/async-thread.c b/fs/btrfs/async-thread.c
index d522494698fa..122cb97c7909 100644
--- a/fs/btrfs/async-thread.c
+++ b/fs/btrfs/async-thread.c
@@ -139,13 +139,11 @@ __btrfs_alloc_workqueue(struct btrfs_fs_info *fs_info, const char *name,
 	}
 
 	if (flags & WQ_HIGHPRI)
-		ret->normal_wq = alloc_workqueue("%s-%s-high", flags,
-						 ret->current_active, "btrfs",
-						 name);
+		ret->normal_wq = alloc_workqueue("btrfs-%s-high", flags,
+						 ret->current_active, name);
 	else
-		ret->normal_wq = alloc_workqueue("%s-%s", flags,
-						 ret->current_active, "btrfs",
-						 name);
+		ret->normal_wq = alloc_workqueue("btrfs-%s", flags,
+						 ret->current_active, name);
 	if (!ret->normal_wq) {
 		kfree(ret);
 		return NULL;
diff --git a/fs/btrfs/backref.c b/fs/btrfs/backref.c
index 78556447e1d5..982152d3f920 100644
--- a/fs/btrfs/backref.c
+++ b/fs/btrfs/backref.c
@@ -712,7 +712,7 @@ out:
  * read tree blocks and add keys where required.
  */
 static int add_missing_keys(struct btrfs_fs_info *fs_info,
-			    struct preftrees *preftrees)
+			    struct preftrees *preftrees, bool lock)
 {
 	struct prelim_ref *ref;
 	struct extent_buffer *eb;
@@ -737,12 +737,14 @@ static int add_missing_keys(struct btrfs_fs_info *fs_info,
 			free_extent_buffer(eb);
 			return -EIO;
 		}
-		btrfs_tree_read_lock(eb);
+		if (lock)
+			btrfs_tree_read_lock(eb);
 		if (btrfs_header_level(eb) == 0)
 			btrfs_item_key_to_cpu(eb, &ref->key_for_search, 0);
 		else
 			btrfs_node_key_to_cpu(eb, &ref->key_for_search, 0);
-		btrfs_tree_read_unlock(eb);
+		if (lock)
+			btrfs_tree_read_unlock(eb);
 		free_extent_buffer(eb);
 		prelim_ref_insert(fs_info, &preftrees->indirect, ref, NULL);
 		cond_resched();
@@ -789,7 +791,7 @@ static int add_delayed_refs(const struct btrfs_fs_info *fs_info,
 			count = node->ref_mod * -1;
 			break;
 		default:
-			BUG_ON(1);
+			BUG();
 		}
 		*total_refs += count;
 		switch (node->type) {
@@ -1227,7 +1229,7 @@ again:
 
 	btrfs_release_path(path);
 
-	ret = add_missing_keys(fs_info, &preftrees);
+	ret = add_missing_keys(fs_info, &preftrees, path->skip_locking == 0);
 	if (ret)
 		goto out;
 
@@ -1288,11 +1290,15 @@ again:
 					ret = -EIO;
 					goto out;
 				}
-				btrfs_tree_read_lock(eb);
-				btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+
+				if (!path->skip_locking) {
+					btrfs_tree_read_lock(eb);
+					btrfs_set_lock_blocking_read(eb);
+				}
 				ret = find_extent_in_eb(eb, bytenr,
 							*extent_item_pos, &eie, ignore_offset);
-				btrfs_tree_read_unlock_blocking(eb);
+				if (!path->skip_locking)
+					btrfs_tree_read_unlock_blocking(eb);
 				free_extent_buffer(eb);
 				if (ret < 0)
 					goto out;
@@ -1454,8 +1460,8 @@ int btrfs_find_all_roots(struct btrfs_trans_handle *trans,
  * callers (such as fiemap) which want to know whether the extent is
  * shared but do not need a ref count.
  *
- * This attempts to allocate a transaction in order to account for
- * delayed refs, but continues on even when the alloc fails.
+ * This attempts to attach to the running transaction in order to account for
+ * delayed refs, but continues on even when no running transaction exists.
  *
  * Return: 0 if extent is not shared, 1 if it is shared, < 0 on error.
  */
@@ -1478,13 +1484,16 @@ int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr)
 	tmp = ulist_alloc(GFP_NOFS);
 	roots = ulist_alloc(GFP_NOFS);
 	if (!tmp || !roots) {
-		ulist_free(tmp);
-		ulist_free(roots);
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto out;
 	}
 
-	trans = btrfs_join_transaction(root);
+	trans = btrfs_attach_transaction(root);
 	if (IS_ERR(trans)) {
+		if (PTR_ERR(trans) != -ENOENT && PTR_ERR(trans) != -EROFS) {
+			ret = PTR_ERR(trans);
+			goto out;
+		}
 		trans = NULL;
 		down_read(&fs_info->commit_root_sem);
 	} else {
@@ -1517,6 +1526,7 @@ int btrfs_check_shared(struct btrfs_root *root, u64 inum, u64 bytenr)
 	} else {
 		up_read(&fs_info->commit_root_sem);
 	}
+out:
 	ulist_free(tmp);
 	ulist_free(roots);
 	return ret;
@@ -1650,7 +1660,7 @@ char *btrfs_ref_to_path(struct btrfs_root *fs_root, struct btrfs_path *path,
 		/* make sure we can use eb after releasing the path */
 		if (eb != eb_in) {
 			if (!path->skip_locking)
-				btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+				btrfs_set_lock_blocking_read(eb);
 			path->nodes[0] = NULL;
 			path->locks[0] = 0;
 		}
@@ -1741,7 +1751,7 @@ int extent_from_logical(struct btrfs_fs_info *fs_info, u64 logical,
 		else if (flags & BTRFS_EXTENT_FLAG_DATA)
 			*flags_ret = BTRFS_EXTENT_FLAG_DATA;
 		else
-			BUG_ON(1);
+			BUG();
 		return 0;
 	}
 
@@ -1906,13 +1916,19 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
 			extent_item_objectid);
 
 	if (!search_commit_root) {
-		trans = btrfs_join_transaction(fs_info->extent_root);
-		if (IS_ERR(trans))
-			return PTR_ERR(trans);
+		trans = btrfs_attach_transaction(fs_info->extent_root);
+		if (IS_ERR(trans)) {
+			if (PTR_ERR(trans) != -ENOENT &&
+			    PTR_ERR(trans) != -EROFS)
+				return PTR_ERR(trans);
+			trans = NULL;
+		}
+	}
+
+	if (trans)
 		btrfs_get_tree_mod_seq(fs_info, &tree_mod_seq_elem);
-	} else {
+	else
 		down_read(&fs_info->commit_root_sem);
-	}
 
 	ret = btrfs_find_all_leafs(trans, fs_info, extent_item_objectid,
 				   tree_mod_seq_elem.seq, &refs,
@@ -1945,7 +1961,7 @@ int iterate_extent_inodes(struct btrfs_fs_info *fs_info,
 
 	free_leaf_list(refs);
 out:
-	if (!search_commit_root) {
+	if (trans) {
 		btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem);
 		btrfs_end_transaction(trans);
 	} else {
diff --git a/fs/btrfs/btrfs_inode.h b/fs/btrfs/btrfs_inode.h
index 6f5d07415dab..d5b438706b77 100644
--- a/fs/btrfs/btrfs_inode.h
+++ b/fs/btrfs/btrfs_inode.h
@@ -148,12 +148,6 @@ struct btrfs_inode {
 	u64 last_unlink_trans;
 
 	/*
-	 * Track the transaction id of the last transaction used to create a
-	 * hard link for the inode. This is used by the log tree (fsync).
-	 */
-	u64 last_link_trans;
-
-	/*
 	 * Number of bytes outstanding that are going to need csums.  This is
 	 * used in ENOSPC accounting.
 	 */
@@ -203,8 +197,6 @@ struct btrfs_inode {
 	struct inode vfs_inode;
 };
 
-extern unsigned char btrfs_filetype_table[];
-
 static inline struct btrfs_inode *BTRFS_I(const struct inode *inode)
 {
 	return container_of(inode, struct btrfs_inode, vfs_inode);
diff --git a/fs/btrfs/compression.c b/fs/btrfs/compression.c
index 548057630b69..84dd4a8980c5 100644
--- a/fs/btrfs/compression.c
+++ b/fs/btrfs/compression.c
@@ -160,15 +160,15 @@ csum_failed:
 	if (cb->errors) {
 		bio_io_error(cb->orig_bio);
 	} else {
-		int i;
 		struct bio_vec *bvec;
+		struct bvec_iter_all iter_all;
 
 		/*
 		 * we have verified the checksum already, set page
 		 * checked so the end_io handlers know about it
 		 */
 		ASSERT(!bio_flagged(bio, BIO_CLONED));
-		bio_for_each_segment_all(bvec, cb->orig_bio, i)
+		bio_for_each_segment_all(bvec, cb->orig_bio, iter_all)
 			SetPageChecked(bvec->bv_page);
 
 		bio_endio(cb->orig_bio);
@@ -250,7 +250,7 @@ static void end_compressed_bio_write(struct bio *bio)
 	cb->compressed_pages[0]->mapping = cb->inode->i_mapping;
 	btrfs_writepage_endio_finish_ordered(cb->compressed_pages[0],
 			cb->start, cb->start + cb->len - 1,
-			bio->bi_status ? BLK_STS_OK : BLK_STS_NOTSUPP);
+			bio->bi_status == BLK_STS_OK);
 	cb->compressed_pages[0]->mapping = NULL;
 
 	end_compressed_writeback(inode, cb);
@@ -730,6 +730,28 @@ struct heuristic_ws {
 	struct list_head list;
 };
 
+static struct workspace_manager heuristic_wsm;
+
+static void heuristic_init_workspace_manager(void)
+{
+	btrfs_init_workspace_manager(&heuristic_wsm, &btrfs_heuristic_compress);
+}
+
+static void heuristic_cleanup_workspace_manager(void)
+{
+	btrfs_cleanup_workspace_manager(&heuristic_wsm);
+}
+
+static struct list_head *heuristic_get_workspace(unsigned int level)
+{
+	return btrfs_get_workspace(&heuristic_wsm, level);
+}
+
+static void heuristic_put_workspace(struct list_head *ws)
+{
+	btrfs_put_workspace(&heuristic_wsm, ws);
+}
+
 static void free_heuristic_ws(struct list_head *ws)
 {
 	struct heuristic_ws *workspace;
@@ -742,7 +764,7 @@ static void free_heuristic_ws(struct list_head *ws)
 	kfree(workspace);
 }
 
-static struct list_head *alloc_heuristic_ws(void)
+static struct list_head *alloc_heuristic_ws(unsigned int level)
 {
 	struct heuristic_ws *ws;
 
@@ -769,65 +791,59 @@ fail:
 	return ERR_PTR(-ENOMEM);
 }
 
-struct workspaces_list {
-	struct list_head idle_ws;
-	spinlock_t ws_lock;
-	/* Number of free workspaces */
-	int free_ws;
-	/* Total number of allocated workspaces */
-	atomic_t total_ws;
-	/* Waiters for a free workspace */
-	wait_queue_head_t ws_wait;
+const struct btrfs_compress_op btrfs_heuristic_compress = {
+	.init_workspace_manager = heuristic_init_workspace_manager,
+	.cleanup_workspace_manager = heuristic_cleanup_workspace_manager,
+	.get_workspace = heuristic_get_workspace,
+	.put_workspace = heuristic_put_workspace,
+	.alloc_workspace = alloc_heuristic_ws,
+	.free_workspace = free_heuristic_ws,
 };
 
-static struct workspaces_list btrfs_comp_ws[BTRFS_COMPRESS_TYPES];
-
-static struct workspaces_list btrfs_heuristic_ws;
-
 static const struct btrfs_compress_op * const btrfs_compress_op[] = {
+	/* The heuristic is represented as compression type 0 */
+	&btrfs_heuristic_compress,
 	&btrfs_zlib_compress,
 	&btrfs_lzo_compress,
 	&btrfs_zstd_compress,
 };
 
-void __init btrfs_init_compress(void)
+void btrfs_init_workspace_manager(struct workspace_manager *wsm,
+				  const struct btrfs_compress_op *ops)
 {
 	struct list_head *workspace;
-	int i;
 
-	INIT_LIST_HEAD(&btrfs_heuristic_ws.idle_ws);
-	spin_lock_init(&btrfs_heuristic_ws.ws_lock);
-	atomic_set(&btrfs_heuristic_ws.total_ws, 0);
-	init_waitqueue_head(&btrfs_heuristic_ws.ws_wait);
+	wsm->ops = ops;
 
-	workspace = alloc_heuristic_ws();
+	INIT_LIST_HEAD(&wsm->idle_ws);
+	spin_lock_init(&wsm->ws_lock);
+	atomic_set(&wsm->total_ws, 0);
+	init_waitqueue_head(&wsm->ws_wait);
+
+	/*
+	 * Preallocate one workspace for each compression type so we can
+	 * guarantee forward progress in the worst case
+	 */
+	workspace = wsm->ops->alloc_workspace(0);
 	if (IS_ERR(workspace)) {
 		pr_warn(
-	"BTRFS: cannot preallocate heuristic workspace, will try later\n");
+	"BTRFS: cannot preallocate compression workspace, will try later\n");
 	} else {
-		atomic_set(&btrfs_heuristic_ws.total_ws, 1);
-		btrfs_heuristic_ws.free_ws = 1;
-		list_add(workspace, &btrfs_heuristic_ws.idle_ws);
+		atomic_set(&wsm->total_ws, 1);
+		wsm->free_ws = 1;
+		list_add(workspace, &wsm->idle_ws);
 	}
+}
 
-	for (i = 0; i < BTRFS_COMPRESS_TYPES; i++) {
-		INIT_LIST_HEAD(&btrfs_comp_ws[i].idle_ws);
-		spin_lock_init(&btrfs_comp_ws[i].ws_lock);
-		atomic_set(&btrfs_comp_ws[i].total_ws, 0);
-		init_waitqueue_head(&btrfs_comp_ws[i].ws_wait);
+void btrfs_cleanup_workspace_manager(struct workspace_manager *wsman)
+{
+	struct list_head *ws;
 
-		/*
-		 * Preallocate one workspace for each compression type so
-		 * we can guarantee forward progress in the worst case
-		 */
-		workspace = btrfs_compress_op[i]->alloc_workspace();
-		if (IS_ERR(workspace)) {
-			pr_warn("BTRFS: cannot preallocate compression workspace, will try later\n");
-		} else {
-			atomic_set(&btrfs_comp_ws[i].total_ws, 1);
-			btrfs_comp_ws[i].free_ws = 1;
-			list_add(workspace, &btrfs_comp_ws[i].idle_ws);
-		}
+	while (!list_empty(&wsman->idle_ws)) {
+		ws = wsman->idle_ws.next;
+		list_del(ws);
+		wsman->ops->free_workspace(ws);
+		atomic_dec(&wsman->total_ws);
 	}
 }
 
@@ -837,11 +853,11 @@ void __init btrfs_init_compress(void)
  * Preallocation makes a forward progress guarantees and we do not return
  * errors.
  */
-static struct list_head *__find_workspace(int type, bool heuristic)
+struct list_head *btrfs_get_workspace(struct workspace_manager *wsm,
+				      unsigned int level)
 {
 	struct list_head *workspace;
 	int cpus = num_online_cpus();
-	int idx = type - 1;
 	unsigned nofs_flag;
 	struct list_head *idle_ws;
 	spinlock_t *ws_lock;
@@ -849,19 +865,11 @@ static struct list_head *__find_workspace(int type, bool heuristic)
 	wait_queue_head_t *ws_wait;
 	int *free_ws;
 
-	if (heuristic) {
-		idle_ws	 = &btrfs_heuristic_ws.idle_ws;
-		ws_lock	 = &btrfs_heuristic_ws.ws_lock;
-		total_ws = &btrfs_heuristic_ws.total_ws;
-		ws_wait	 = &btrfs_heuristic_ws.ws_wait;
-		free_ws	 = &btrfs_heuristic_ws.free_ws;
-	} else {
-		idle_ws	 = &btrfs_comp_ws[idx].idle_ws;
-		ws_lock	 = &btrfs_comp_ws[idx].ws_lock;
-		total_ws = &btrfs_comp_ws[idx].total_ws;
-		ws_wait	 = &btrfs_comp_ws[idx].ws_wait;
-		free_ws	 = &btrfs_comp_ws[idx].free_ws;
-	}
+	idle_ws	 = &wsm->idle_ws;
+	ws_lock	 = &wsm->ws_lock;
+	total_ws = &wsm->total_ws;
+	ws_wait	 = &wsm->ws_wait;
+	free_ws	 = &wsm->free_ws;
 
 again:
 	spin_lock(ws_lock);
@@ -892,10 +900,7 @@ again:
 	 * context of btrfs_compress_bio/btrfs_compress_pages
 	 */
 	nofs_flag = memalloc_nofs_save();
-	if (heuristic)
-		workspace = alloc_heuristic_ws();
-	else
-		workspace = btrfs_compress_op[idx]->alloc_workspace();
+	workspace = wsm->ops->alloc_workspace(level);
 	memalloc_nofs_restore(nofs_flag);
 
 	if (IS_ERR(workspace)) {
@@ -926,85 +931,47 @@ again:
 	return workspace;
 }
 
-static struct list_head *find_workspace(int type)
+static struct list_head *get_workspace(int type, int level)
 {
-	return __find_workspace(type, false);
+	return btrfs_compress_op[type]->get_workspace(level);
 }
 
 /*
  * put a workspace struct back on the list or free it if we have enough
  * idle ones sitting around
  */
-static void __free_workspace(int type, struct list_head *workspace,
-			     bool heuristic)
+void btrfs_put_workspace(struct workspace_manager *wsm, struct list_head *ws)
 {
-	int idx = type - 1;
 	struct list_head *idle_ws;
 	spinlock_t *ws_lock;
 	atomic_t *total_ws;
 	wait_queue_head_t *ws_wait;
 	int *free_ws;
 
-	if (heuristic) {
-		idle_ws	 = &btrfs_heuristic_ws.idle_ws;
-		ws_lock	 = &btrfs_heuristic_ws.ws_lock;
-		total_ws = &btrfs_heuristic_ws.total_ws;
-		ws_wait	 = &btrfs_heuristic_ws.ws_wait;
-		free_ws	 = &btrfs_heuristic_ws.free_ws;
-	} else {
-		idle_ws	 = &btrfs_comp_ws[idx].idle_ws;
-		ws_lock	 = &btrfs_comp_ws[idx].ws_lock;
-		total_ws = &btrfs_comp_ws[idx].total_ws;
-		ws_wait	 = &btrfs_comp_ws[idx].ws_wait;
-		free_ws	 = &btrfs_comp_ws[idx].free_ws;
-	}
+	idle_ws	 = &wsm->idle_ws;
+	ws_lock	 = &wsm->ws_lock;
+	total_ws = &wsm->total_ws;
+	ws_wait	 = &wsm->ws_wait;
+	free_ws	 = &wsm->free_ws;
 
 	spin_lock(ws_lock);
 	if (*free_ws <= num_online_cpus()) {
-		list_add(workspace, idle_ws);
+		list_add(ws, idle_ws);
 		(*free_ws)++;
 		spin_unlock(ws_lock);
 		goto wake;
 	}
 	spin_unlock(ws_lock);
 
-	if (heuristic)
-		free_heuristic_ws(workspace);
-	else
-		btrfs_compress_op[idx]->free_workspace(workspace);
+	wsm->ops->free_workspace(ws);
 	atomic_dec(total_ws);
 wake:
 	cond_wake_up(ws_wait);
 }
 
-static void free_workspace(int type, struct list_head *ws)
+static void put_workspace(int type, struct list_head *ws)
 {
-	return __free_workspace(type, ws, false);
-}
-
-/*
- * cleanup function for module exit
- */
-static void free_workspaces(void)
-{
-	struct list_head *workspace;
-	int i;
-
-	while (!list_empty(&btrfs_heuristic_ws.idle_ws)) {
-		workspace = btrfs_heuristic_ws.idle_ws.next;
-		list_del(workspace);
-		free_heuristic_ws(workspace);
-		atomic_dec(&btrfs_heuristic_ws.total_ws);
-	}
-
-	for (i = 0; i < BTRFS_COMPRESS_TYPES; i++) {
-		while (!list_empty(&btrfs_comp_ws[i].idle_ws)) {
-			workspace = btrfs_comp_ws[i].idle_ws.next;
-			list_del(workspace);
-			btrfs_compress_op[i]->free_workspace(workspace);
-			atomic_dec(&btrfs_comp_ws[i].total_ws);
-		}
-	}
+	return btrfs_compress_op[type]->put_workspace(ws);
 }
 
 /*
@@ -1036,18 +1003,18 @@ int btrfs_compress_pages(unsigned int type_level, struct address_space *mapping,
 			 unsigned long *total_in,
 			 unsigned long *total_out)
 {
+	int type = btrfs_compress_type(type_level);
+	int level = btrfs_compress_level(type_level);
 	struct list_head *workspace;
 	int ret;
-	int type = type_level & 0xF;
-
-	workspace = find_workspace(type);
 
-	btrfs_compress_op[type - 1]->set_level(workspace, type_level);
-	ret = btrfs_compress_op[type-1]->compress_pages(workspace, mapping,
+	level = btrfs_compress_op[type]->set_level(level);
+	workspace = get_workspace(type, level);
+	ret = btrfs_compress_op[type]->compress_pages(workspace, mapping,
 						      start, pages,
 						      out_pages,
 						      total_in, total_out);
-	free_workspace(type, workspace);
+	put_workspace(type, workspace);
 	return ret;
 }
 
@@ -1071,9 +1038,9 @@ static int btrfs_decompress_bio(struct compressed_bio *cb)
 	int ret;
 	int type = cb->compress_type;
 
-	workspace = find_workspace(type);
-	ret = btrfs_compress_op[type - 1]->decompress_bio(workspace, cb);
-	free_workspace(type, workspace);
+	workspace = get_workspace(type, 0);
+	ret = btrfs_compress_op[type]->decompress_bio(workspace, cb);
+	put_workspace(type, workspace);
 
 	return ret;
 }
@@ -1089,19 +1056,29 @@ int btrfs_decompress(int type, unsigned char *data_in, struct page *dest_page,
 	struct list_head *workspace;
 	int ret;
 
-	workspace = find_workspace(type);
-
-	ret = btrfs_compress_op[type-1]->decompress(workspace, data_in,
+	workspace = get_workspace(type, 0);
+	ret = btrfs_compress_op[type]->decompress(workspace, data_in,
 						  dest_page, start_byte,
 						  srclen, destlen);
+	put_workspace(type, workspace);
 
-	free_workspace(type, workspace);
 	return ret;
 }
 
+void __init btrfs_init_compress(void)
+{
+	int i;
+
+	for (i = 0; i < BTRFS_NR_WORKSPACE_MANAGERS; i++)
+		btrfs_compress_op[i]->init_workspace_manager();
+}
+
 void __cold btrfs_exit_compress(void)
 {
-	free_workspaces();
+	int i;
+
+	for (i = 0; i < BTRFS_NR_WORKSPACE_MANAGERS; i++)
+		btrfs_compress_op[i]->cleanup_workspace_manager();
 }
 
 /*
@@ -1512,7 +1489,7 @@ static void heuristic_collect_sample(struct inode *inode, u64 start, u64 end,
  */
 int btrfs_compress_heuristic(struct inode *inode, u64 start, u64 end)
 {
-	struct list_head *ws_list = __find_workspace(0, true);
+	struct list_head *ws_list = get_workspace(0, 0);
 	struct heuristic_ws *ws;
 	u32 i;
 	u8 byte;
@@ -1581,18 +1558,29 @@ int btrfs_compress_heuristic(struct inode *inode, u64 start, u64 end)
 	}
 
 out:
-	__free_workspace(0, ws_list, true);
+	put_workspace(0, ws_list);
 	return ret;
 }
 
-unsigned int btrfs_compress_str2level(const char *str)
+/*
+ * Convert the compression suffix (eg. after "zlib" starting with ":") to
+ * level, unrecognized string will set the default level
+ */
+unsigned int btrfs_compress_str2level(unsigned int type, const char *str)
 {
-	if (strncmp(str, "zlib", 4) != 0)
+	unsigned int level = 0;
+	int ret;
+
+	if (!type)
 		return 0;
 
-	/* Accepted form: zlib:1 up to zlib:9 and nothing left after the number */
-	if (str[4] == ':' && '1' <= str[5] && str[5] <= '9' && str[6] == 0)
-		return str[5] - '0';
+	if (str[0] == ':') {
+		ret = kstrtouint(str + 1, 10, &level);
+		if (ret)
+			level = 0;
+	}
+
+	level = btrfs_compress_op[type]->set_level(level);
 
-	return BTRFS_ZLIB_DEFAULT_LEVEL;
+	return level;
 }
diff --git a/fs/btrfs/compression.h b/fs/btrfs/compression.h
index ddda9b80bf20..9976fe0f7526 100644
--- a/fs/btrfs/compression.h
+++ b/fs/btrfs/compression.h
@@ -64,6 +64,16 @@ struct compressed_bio {
 	u32 sums;
 };
 
+static inline unsigned int btrfs_compress_type(unsigned int type_level)
+{
+	return (type_level & 0xF);
+}
+
+static inline unsigned int btrfs_compress_level(unsigned int type_level)
+{
+	return ((type_level & 0xF0) >> 4);
+}
+
 void __init btrfs_init_compress(void);
 void __cold btrfs_exit_compress(void);
 
@@ -87,7 +97,7 @@ blk_status_t btrfs_submit_compressed_write(struct inode *inode, u64 start,
 blk_status_t btrfs_submit_compressed_read(struct inode *inode, struct bio *bio,
 				 int mirror_num, unsigned long bio_flags);
 
-unsigned btrfs_compress_str2level(const char *str);
+unsigned int btrfs_compress_str2level(unsigned int type, const char *str);
 
 enum btrfs_compression_type {
 	BTRFS_COMPRESS_NONE  = 0,
@@ -97,8 +107,35 @@ enum btrfs_compression_type {
 	BTRFS_COMPRESS_TYPES = 3,
 };
 
+struct workspace_manager {
+	const struct btrfs_compress_op *ops;
+	struct list_head idle_ws;
+	spinlock_t ws_lock;
+	/* Number of free workspaces */
+	int free_ws;
+	/* Total number of allocated workspaces */
+	atomic_t total_ws;
+	/* Waiters for a free workspace */
+	wait_queue_head_t ws_wait;
+};
+
+void btrfs_init_workspace_manager(struct workspace_manager *wsm,
+				  const struct btrfs_compress_op *ops);
+struct list_head *btrfs_get_workspace(struct workspace_manager *wsm,
+				      unsigned int level);
+void btrfs_put_workspace(struct workspace_manager *wsm, struct list_head *ws);
+void btrfs_cleanup_workspace_manager(struct workspace_manager *wsm);
+
 struct btrfs_compress_op {
-	struct list_head *(*alloc_workspace)(void);
+	void (*init_workspace_manager)(void);
+
+	void (*cleanup_workspace_manager)(void);
+
+	struct list_head *(*get_workspace)(unsigned int level);
+
+	void (*put_workspace)(struct list_head *ws);
+
+	struct list_head *(*alloc_workspace)(unsigned int level);
 
 	void (*free_workspace)(struct list_head *workspace);
 
@@ -119,9 +156,18 @@ struct btrfs_compress_op {
 			  unsigned long start_byte,
 			  size_t srclen, size_t destlen);
 
-	void (*set_level)(struct list_head *ws, unsigned int type);
+	/*
+	 * This bounds the level set by the user to be within range of a
+	 * particular compression type.  It returns the level that will be used
+	 * if the level is out of bounds or the default if 0 is passed in.
+	 */
+	unsigned int (*set_level)(unsigned int level);
 };
 
+/* The heuristic workspaces are managed via the 0th workspace manager */
+#define BTRFS_NR_WORKSPACE_MANAGERS	(BTRFS_COMPRESS_TYPES + 1)
+
+extern const struct btrfs_compress_op btrfs_heuristic_compress;
 extern const struct btrfs_compress_op btrfs_zlib_compress;
 extern const struct btrfs_compress_op btrfs_lzo_compress;
 extern const struct btrfs_compress_op btrfs_zstd_compress;
diff --git a/fs/btrfs/ctree.c b/fs/btrfs/ctree.c
index 5a6c39b44c84..5df76c17775a 100644
--- a/fs/btrfs/ctree.c
+++ b/fs/btrfs/ctree.c
@@ -13,6 +13,7 @@
 #include "print-tree.h"
 #include "locking.h"
 #include "volumes.h"
+#include "qgroup.h"
 
 static int split_node(struct btrfs_trans_handle *trans, struct btrfs_root
 		      *root, struct btrfs_path *path, int level);
@@ -20,11 +21,9 @@ static int split_leaf(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 		      const struct btrfs_key *ins_key, struct btrfs_path *path,
 		      int data_size, int extend);
 static int push_node_left(struct btrfs_trans_handle *trans,
-			  struct btrfs_fs_info *fs_info,
 			  struct extent_buffer *dst,
 			  struct extent_buffer *src, int empty);
 static int balance_node_right(struct btrfs_trans_handle *trans,
-			      struct btrfs_fs_info *fs_info,
 			      struct extent_buffer *dst_buf,
 			      struct extent_buffer *src_buf);
 static void del_ptr(struct btrfs_root *root, struct btrfs_path *path,
@@ -45,11 +44,18 @@ noinline void btrfs_set_path_blocking(struct btrfs_path *p)
 	for (i = 0; i < BTRFS_MAX_LEVEL; i++) {
 		if (!p->nodes[i] || !p->locks[i])
 			continue;
-		btrfs_set_lock_blocking_rw(p->nodes[i], p->locks[i]);
-		if (p->locks[i] == BTRFS_READ_LOCK)
+		/*
+		 * If we currently have a spinning reader or writer lock this
+		 * will bump the count of blocking holders and drop the
+		 * spinlock.
+		 */
+		if (p->locks[i] == BTRFS_READ_LOCK) {
+			btrfs_set_lock_blocking_read(p->nodes[i]);
 			p->locks[i] = BTRFS_READ_LOCK_BLOCKING;
-		else if (p->locks[i] == BTRFS_WRITE_LOCK)
+		} else if (p->locks[i] == BTRFS_WRITE_LOCK) {
+			btrfs_set_lock_blocking_write(p->nodes[i]);
 			p->locks[i] = BTRFS_WRITE_LOCK_BLOCKING;
+		}
 	}
 }
 
@@ -718,11 +724,11 @@ tree_mod_log_search(struct btrfs_fs_info *fs_info, u64 start, u64 min_seq)
 	return __tree_mod_log_search(fs_info, start, min_seq, 0);
 }
 
-static noinline int
-tree_mod_log_eb_copy(struct btrfs_fs_info *fs_info, struct extent_buffer *dst,
+static noinline int tree_mod_log_eb_copy(struct extent_buffer *dst,
 		     struct extent_buffer *src, unsigned long dst_offset,
 		     unsigned long src_offset, int nr_items)
 {
+	struct btrfs_fs_info *fs_info = dst->fs_info;
 	int ret = 0;
 	struct tree_mod_elem **tm_list = NULL;
 	struct tree_mod_elem **tm_list_add, **tm_list_rem;
@@ -942,7 +948,7 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
 		if (new_flags != 0) {
 			int level = btrfs_header_level(buf);
 
-			ret = btrfs_set_disk_extent_flags(trans, fs_info,
+			ret = btrfs_set_disk_extent_flags(trans,
 							  buf->start,
 							  buf->len,
 							  new_flags, level, 0);
@@ -962,7 +968,7 @@ static noinline int update_ref_for_cow(struct btrfs_trans_handle *trans,
 			if (ret)
 				return ret;
 		}
-		clean_tree_block(fs_info, buf);
+		btrfs_clean_tree_block(buf);
 		*last_ref = 1;
 	}
 	return 0;
@@ -1288,7 +1294,7 @@ tree_mod_log_rewind(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 		return eb;
 
 	btrfs_set_path_blocking(path);
-	btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+	btrfs_set_lock_blocking_read(eb);
 
 	if (tm->op == MOD_LOG_KEY_REMOVE_WHILE_FREEING) {
 		BUG_ON(tm->slot != 0);
@@ -1378,7 +1384,7 @@ get_old_root(struct btrfs_root *root, u64 time_seq)
 		free_extent_buffer(eb_root);
 		eb = alloc_dummy_extent_buffer(fs_info, logical);
 	} else {
-		btrfs_set_lock_blocking_rw(eb_root, BTRFS_READ_LOCK);
+		btrfs_set_lock_blocking_read(eb_root);
 		eb = btrfs_clone_extent_buffer(eb_root);
 		btrfs_tree_read_unlock_blocking(eb_root);
 		free_extent_buffer(eb_root);
@@ -1486,9 +1492,16 @@ noinline int btrfs_cow_block(struct btrfs_trans_handle *trans,
 	search_start = buf->start & ~((u64)SZ_1G - 1);
 
 	if (parent)
-		btrfs_set_lock_blocking(parent);
-	btrfs_set_lock_blocking(buf);
+		btrfs_set_lock_blocking_write(parent);
+	btrfs_set_lock_blocking_write(buf);
 
+	/*
+	 * Before CoWing this block for later modification, check if it's
+	 * the subtree root and do the delayed subtree trace if needed.
+	 *
+	 * Also We don't care about the error, as it's handled internally.
+	 */
+	btrfs_qgroup_trace_subtree_after_cow(trans, root, buf);
 	ret = __btrfs_cow_block(trans, root, buf, parent,
 				 parent_slot, cow_ret, search_start, 0);
 
@@ -1582,7 +1595,7 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
 	if (parent_nritems <= 1)
 		return 0;
 
-	btrfs_set_lock_blocking(parent);
+	btrfs_set_lock_blocking_write(parent);
 
 	for (i = start_slot; i <= end_slot; i++) {
 		struct btrfs_key first_key;
@@ -1641,7 +1654,7 @@ int btrfs_realloc_node(struct btrfs_trans_handle *trans,
 			search_start = last_block;
 
 		btrfs_tree_lock(cur);
-		btrfs_set_lock_blocking(cur);
+		btrfs_set_lock_blocking_write(cur);
 		err = __btrfs_cow_block(trans, root, cur, parent, i,
 					&cur, search_start,
 					min(16 * blocksize,
@@ -1777,9 +1790,8 @@ static void root_sub_used(struct btrfs_root *root, u32 size)
 /* given a node and slot number, this reads the blocks it points to.  The
  * extent buffer is returned with a reference taken (but unlocked).
  */
-static noinline struct extent_buffer *
-read_node_slot(struct btrfs_fs_info *fs_info, struct extent_buffer *parent,
-	       int slot)
+static noinline struct extent_buffer *read_node_slot(
+				struct extent_buffer *parent, int slot)
 {
 	int level = btrfs_header_level(parent);
 	struct extent_buffer *eb;
@@ -1791,7 +1803,7 @@ read_node_slot(struct btrfs_fs_info *fs_info, struct extent_buffer *parent,
 	BUG_ON(level == 0);
 
 	btrfs_node_key_to_cpu(parent, &first_key, slot);
-	eb = read_tree_block(fs_info, btrfs_node_blockptr(parent, slot),
+	eb = read_tree_block(parent->fs_info, btrfs_node_blockptr(parent, slot),
 			     btrfs_node_ptr_generation(parent, slot),
 			     level - 1, &first_key);
 	if (!IS_ERR(eb) && !extent_buffer_uptodate(eb)) {
@@ -1848,7 +1860,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
 			return 0;
 
 		/* promote the child to a root */
-		child = read_node_slot(fs_info, mid, 0);
+		child = read_node_slot(mid, 0);
 		if (IS_ERR(child)) {
 			ret = PTR_ERR(child);
 			btrfs_handle_fs_error(fs_info, ret, NULL);
@@ -1856,7 +1868,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
 		}
 
 		btrfs_tree_lock(child);
-		btrfs_set_lock_blocking(child);
+		btrfs_set_lock_blocking_write(child);
 		ret = btrfs_cow_block(trans, root, child, mid, 0, &child);
 		if (ret) {
 			btrfs_tree_unlock(child);
@@ -1873,7 +1885,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
 
 		path->locks[level] = 0;
 		path->nodes[level] = NULL;
-		clean_tree_block(fs_info, mid);
+		btrfs_clean_tree_block(mid);
 		btrfs_tree_unlock(mid);
 		/* once for the path */
 		free_extent_buffer(mid);
@@ -1888,13 +1900,13 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
 	    BTRFS_NODEPTRS_PER_BLOCK(fs_info) / 4)
 		return 0;
 
-	left = read_node_slot(fs_info, parent, pslot - 1);
+	left = read_node_slot(parent, pslot - 1);
 	if (IS_ERR(left))
 		left = NULL;
 
 	if (left) {
 		btrfs_tree_lock(left);
-		btrfs_set_lock_blocking(left);
+		btrfs_set_lock_blocking_write(left);
 		wret = btrfs_cow_block(trans, root, left,
 				       parent, pslot - 1, &left);
 		if (wret) {
@@ -1903,13 +1915,13 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
 		}
 	}
 
-	right = read_node_slot(fs_info, parent, pslot + 1);
+	right = read_node_slot(parent, pslot + 1);
 	if (IS_ERR(right))
 		right = NULL;
 
 	if (right) {
 		btrfs_tree_lock(right);
-		btrfs_set_lock_blocking(right);
+		btrfs_set_lock_blocking_write(right);
 		wret = btrfs_cow_block(trans, root, right,
 				       parent, pslot + 1, &right);
 		if (wret) {
@@ -1921,7 +1933,7 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
 	/* first, try to make some room in the middle buffer */
 	if (left) {
 		orig_slot += btrfs_header_nritems(left);
-		wret = push_node_left(trans, fs_info, left, mid, 1);
+		wret = push_node_left(trans, left, mid, 1);
 		if (wret < 0)
 			ret = wret;
 	}
@@ -1930,11 +1942,11 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
 	 * then try to empty the right most buffer into the middle
 	 */
 	if (right) {
-		wret = push_node_left(trans, fs_info, mid, right, 1);
+		wret = push_node_left(trans, mid, right, 1);
 		if (wret < 0 && wret != -ENOSPC)
 			ret = wret;
 		if (btrfs_header_nritems(right) == 0) {
-			clean_tree_block(fs_info, right);
+			btrfs_clean_tree_block(right);
 			btrfs_tree_unlock(right);
 			del_ptr(root, path, level + 1, pslot + 1);
 			root_sub_used(root, right->len);
@@ -1966,20 +1978,20 @@ static noinline int balance_level(struct btrfs_trans_handle *trans,
 			btrfs_handle_fs_error(fs_info, ret, NULL);
 			goto enospc;
 		}
-		wret = balance_node_right(trans, fs_info, mid, left);
+		wret = balance_node_right(trans, mid, left);
 		if (wret < 0) {
 			ret = wret;
 			goto enospc;
 		}
 		if (wret == 1) {
-			wret = push_node_left(trans, fs_info, left, mid, 1);
+			wret = push_node_left(trans, left, mid, 1);
 			if (wret < 0)
 				ret = wret;
 		}
 		BUG_ON(wret == 1);
 	}
 	if (btrfs_header_nritems(mid) == 0) {
-		clean_tree_block(fs_info, mid);
+		btrfs_clean_tree_block(mid);
 		btrfs_tree_unlock(mid);
 		del_ptr(root, path, level + 1, pslot);
 		root_sub_used(root, mid->len);
@@ -2063,7 +2075,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
 	if (!parent)
 		return 1;
 
-	left = read_node_slot(fs_info, parent, pslot - 1);
+	left = read_node_slot(parent, pslot - 1);
 	if (IS_ERR(left))
 		left = NULL;
 
@@ -2072,7 +2084,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
 		u32 left_nr;
 
 		btrfs_tree_lock(left);
-		btrfs_set_lock_blocking(left);
+		btrfs_set_lock_blocking_write(left);
 
 		left_nr = btrfs_header_nritems(left);
 		if (left_nr >= BTRFS_NODEPTRS_PER_BLOCK(fs_info) - 1) {
@@ -2083,8 +2095,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
 			if (ret)
 				wret = 1;
 			else {
-				wret = push_node_left(trans, fs_info,
-						      left, mid, 0);
+				wret = push_node_left(trans, left, mid, 0);
 			}
 		}
 		if (wret < 0)
@@ -2116,7 +2127,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
 		btrfs_tree_unlock(left);
 		free_extent_buffer(left);
 	}
-	right = read_node_slot(fs_info, parent, pslot + 1);
+	right = read_node_slot(parent, pslot + 1);
 	if (IS_ERR(right))
 		right = NULL;
 
@@ -2127,7 +2138,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
 		u32 right_nr;
 
 		btrfs_tree_lock(right);
-		btrfs_set_lock_blocking(right);
+		btrfs_set_lock_blocking_write(right);
 
 		right_nr = btrfs_header_nritems(right);
 		if (right_nr >= BTRFS_NODEPTRS_PER_BLOCK(fs_info) - 1) {
@@ -2139,8 +2150,7 @@ static noinline int push_nodes_for_insert(struct btrfs_trans_handle *trans,
 			if (ret)
 				wret = 1;
 			else {
-				wret = balance_node_right(trans, fs_info,
-							  right, mid);
+				wret = balance_node_right(trans, right, mid);
 			}
 		}
 		if (wret < 0)
@@ -2401,6 +2411,16 @@ read_block_for_search(struct btrfs_root *root, struct btrfs_path *p,
 	if (tmp) {
 		/* first we do an atomic uptodate check */
 		if (btrfs_buffer_uptodate(tmp, gen, 1) > 0) {
+			/*
+			 * Do extra check for first_key, eb can be stale due to
+			 * being cached, read from scrub, or have multiple
+			 * parents (shared tree blocks).
+			 */
+			if (btrfs_verify_level_key(tmp,
+					parent_level - 1, &first_key, gen)) {
+				free_extent_buffer(tmp);
+				return -EUCLEAN;
+			}
 			*eb_ret = tmp;
 			return 0;
 		}
@@ -2529,26 +2549,6 @@ done:
 	return ret;
 }
 
-static void key_search_validate(struct extent_buffer *b,
-				const struct btrfs_key *key,
-				int level)
-{
-#ifdef CONFIG_BTRFS_ASSERT
-	struct btrfs_disk_key disk_key;
-
-	btrfs_cpu_key_to_disk(&disk_key, key);
-
-	if (level == 0)
-		ASSERT(!memcmp_extent_buffer(b, &disk_key,
-		    offsetof(struct btrfs_leaf, items[0].key),
-		    sizeof(disk_key)));
-	else
-		ASSERT(!memcmp_extent_buffer(b, &disk_key,
-		    offsetof(struct btrfs_node, ptrs[0].key),
-		    sizeof(disk_key)));
-#endif
-}
-
 static int key_search(struct extent_buffer *b, const struct btrfs_key *key,
 		      int level, int *prev_cmp, int *slot)
 {
@@ -2557,7 +2557,6 @@ static int key_search(struct extent_buffer *b, const struct btrfs_key *key,
 		return *prev_cmp;
 	}
 
-	key_search_validate(b, key, level);
 	*slot = 0;
 
 	return 0;
@@ -2712,7 +2711,6 @@ int btrfs_search_slot(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 		      const struct btrfs_key *key, struct btrfs_path *p,
 		      int ins_len, int cow)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct extent_buffer *b;
 	int slot;
 	int ret;
@@ -2910,7 +2908,7 @@ cow_done:
 		} else {
 			p->slots[level] = slot;
 			if (ins_len > 0 &&
-			    btrfs_leaf_free_space(fs_info, b) < ins_len) {
+			    btrfs_leaf_free_space(b) < ins_len) {
 				if (write_lock_level < 1) {
 					write_lock_level = 1;
 					btrfs_release_path(p);
@@ -3005,6 +3003,8 @@ again:
 		 */
 		prev_cmp = -1;
 		ret = key_search(b, key, level, &prev_cmp, &slot);
+		if (ret < 0)
+			goto done;
 
 		if (level != 0) {
 			int dec = 0;
@@ -3185,11 +3185,31 @@ void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
 	slot = path->slots[0];
 	if (slot > 0) {
 		btrfs_item_key(eb, &disk_key, slot - 1);
-		BUG_ON(comp_keys(&disk_key, new_key) >= 0);
+		if (unlikely(comp_keys(&disk_key, new_key) >= 0)) {
+			btrfs_crit(fs_info,
+		"slot %u key (%llu %u %llu) new key (%llu %u %llu)",
+				   slot, btrfs_disk_key_objectid(&disk_key),
+				   btrfs_disk_key_type(&disk_key),
+				   btrfs_disk_key_offset(&disk_key),
+				   new_key->objectid, new_key->type,
+				   new_key->offset);
+			btrfs_print_leaf(eb);
+			BUG();
+		}
 	}
 	if (slot < btrfs_header_nritems(eb) - 1) {
 		btrfs_item_key(eb, &disk_key, slot + 1);
-		BUG_ON(comp_keys(&disk_key, new_key) <= 0);
+		if (unlikely(comp_keys(&disk_key, new_key) <= 0)) {
+			btrfs_crit(fs_info,
+		"slot %u key (%llu %u %llu) new key (%llu %u %llu)",
+				   slot, btrfs_disk_key_objectid(&disk_key),
+				   btrfs_disk_key_type(&disk_key),
+				   btrfs_disk_key_offset(&disk_key),
+				   new_key->objectid, new_key->type,
+				   new_key->offset);
+			btrfs_print_leaf(eb);
+			BUG();
+		}
 	}
 
 	btrfs_cpu_key_to_disk(&disk_key, new_key);
@@ -3207,10 +3227,10 @@ void btrfs_set_item_key_safe(struct btrfs_fs_info *fs_info,
  * error, and > 0 if there was no room in the left hand block.
  */
 static int push_node_left(struct btrfs_trans_handle *trans,
-			  struct btrfs_fs_info *fs_info,
 			  struct extent_buffer *dst,
 			  struct extent_buffer *src, int empty)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	int push_items = 0;
 	int src_nritems;
 	int dst_nritems;
@@ -3243,8 +3263,7 @@ static int push_node_left(struct btrfs_trans_handle *trans,
 	} else
 		push_items = min(src_nritems - 8, push_items);
 
-	ret = tree_mod_log_eb_copy(fs_info, dst, src, dst_nritems, 0,
-				   push_items);
+	ret = tree_mod_log_eb_copy(dst, src, dst_nritems, 0, push_items);
 	if (ret) {
 		btrfs_abort_transaction(trans, ret);
 		return ret;
@@ -3282,10 +3301,10 @@ static int push_node_left(struct btrfs_trans_handle *trans,
  * this will  only push up to 1/2 the contents of the left node over
  */
 static int balance_node_right(struct btrfs_trans_handle *trans,
-			      struct btrfs_fs_info *fs_info,
 			      struct extent_buffer *dst,
 			      struct extent_buffer *src)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	int push_items = 0;
 	int max_push;
 	int src_nritems;
@@ -3319,8 +3338,8 @@ static int balance_node_right(struct btrfs_trans_handle *trans,
 				      (dst_nritems) *
 				      sizeof(struct btrfs_key_ptr));
 
-	ret = tree_mod_log_eb_copy(fs_info, dst, src, 0,
-				   src_nritems - push_items, push_items);
+	ret = tree_mod_log_eb_copy(dst, src, 0, src_nritems - push_items,
+				   push_items);
 	if (ret) {
 		btrfs_abort_transaction(trans, ret);
 		return ret;
@@ -3408,7 +3427,7 @@ static noinline int insert_new_root(struct btrfs_trans_handle *trans,
  * blocknr is the block the key points to.
  */
 static void insert_ptr(struct btrfs_trans_handle *trans,
-		       struct btrfs_fs_info *fs_info, struct btrfs_path *path,
+		       struct btrfs_path *path,
 		       struct btrfs_disk_key *key, u64 bytenr,
 		       int slot, int level)
 {
@@ -3421,7 +3440,7 @@ static void insert_ptr(struct btrfs_trans_handle *trans,
 	lower = path->nodes[level];
 	nritems = btrfs_header_nritems(lower);
 	BUG_ON(slot > nritems);
-	BUG_ON(nritems == BTRFS_NODEPTRS_PER_BLOCK(fs_info));
+	BUG_ON(nritems == BTRFS_NODEPTRS_PER_BLOCK(trans->fs_info));
 	if (slot != nritems) {
 		if (level) {
 			ret = tree_mod_log_insert_move(lower, slot + 1, slot,
@@ -3505,7 +3524,7 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
 	root_add_used(root, fs_info->nodesize);
 	ASSERT(btrfs_header_level(c) == level);
 
-	ret = tree_mod_log_eb_copy(fs_info, split, c, 0, mid, c_nritems - mid);
+	ret = tree_mod_log_eb_copy(split, c, 0, mid, c_nritems - mid);
 	if (ret) {
 		btrfs_abort_transaction(trans, ret);
 		return ret;
@@ -3521,7 +3540,7 @@ static noinline int split_node(struct btrfs_trans_handle *trans,
 	btrfs_mark_buffer_dirty(c);
 	btrfs_mark_buffer_dirty(split);
 
-	insert_ptr(trans, fs_info, path, &disk_key, split->start,
+	insert_ptr(trans, path, &disk_key, split->start,
 		   path->slots[level + 1] + 1, level + 1);
 
 	if (path->slots[level] >= mid) {
@@ -3569,9 +3588,9 @@ static int leaf_space_used(struct extent_buffer *l, int start, int nr)
  * the start of the leaf data.  IOW, how much room
  * the leaf has left for both items and data
  */
-noinline int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
-				   struct extent_buffer *leaf)
+noinline int btrfs_leaf_free_space(struct extent_buffer *leaf)
 {
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
 	int nritems = btrfs_header_nritems(leaf);
 	int ret;
 
@@ -3590,13 +3609,13 @@ noinline int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
  * min slot controls the lowest index we're willing to push to the
  * right.  We'll push up to and including min_slot, but no lower
  */
-static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
-				      struct btrfs_path *path,
+static noinline int __push_leaf_right(struct btrfs_path *path,
 				      int data_size, int empty,
 				      struct extent_buffer *right,
 				      int free_space, u32 left_nritems,
 				      u32 min_slot)
 {
+	struct btrfs_fs_info *fs_info = right->fs_info;
 	struct extent_buffer *left = path->nodes[0];
 	struct extent_buffer *upper = path->nodes[1];
 	struct btrfs_map_token token;
@@ -3630,7 +3649,8 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
 			if (path->slots[0] > i)
 				break;
 			if (path->slots[0] == i) {
-				int space = btrfs_leaf_free_space(fs_info, left);
+				int space = btrfs_leaf_free_space(left);
+
 				if (space + push_space * 2 > free_space)
 					break;
 			}
@@ -3659,10 +3679,10 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
 	right_nritems = btrfs_header_nritems(right);
 
 	push_space = btrfs_item_end_nr(left, left_nritems - push_items);
-	push_space -= leaf_data_end(fs_info, left);
+	push_space -= leaf_data_end(left);
 
 	/* make room in the right data area */
-	data_end = leaf_data_end(fs_info, right);
+	data_end = leaf_data_end(right);
 	memmove_extent_buffer(right,
 			      BTRFS_LEAF_DATA_OFFSET + data_end - push_space,
 			      BTRFS_LEAF_DATA_OFFSET + data_end,
@@ -3671,7 +3691,7 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
 	/* copy from the left data area */
 	copy_extent_buffer(right, left, BTRFS_LEAF_DATA_OFFSET +
 		     BTRFS_LEAF_DATA_SIZE(fs_info) - push_space,
-		     BTRFS_LEAF_DATA_OFFSET + leaf_data_end(fs_info, left),
+		     BTRFS_LEAF_DATA_OFFSET + leaf_data_end(left),
 		     push_space);
 
 	memmove_extent_buffer(right, btrfs_item_nr_offset(push_items),
@@ -3699,7 +3719,7 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
 	if (left_nritems)
 		btrfs_mark_buffer_dirty(left);
 	else
-		clean_tree_block(fs_info, left);
+		btrfs_clean_tree_block(left);
 
 	btrfs_mark_buffer_dirty(right);
 
@@ -3711,7 +3731,7 @@ static noinline int __push_leaf_right(struct btrfs_fs_info *fs_info,
 	if (path->slots[0] >= left_nritems) {
 		path->slots[0] -= left_nritems;
 		if (btrfs_header_nritems(path->nodes[0]) == 0)
-			clean_tree_block(fs_info, path->nodes[0]);
+			btrfs_clean_tree_block(path->nodes[0]);
 		btrfs_tree_unlock(path->nodes[0]);
 		free_extent_buffer(path->nodes[0]);
 		path->nodes[0] = right;
@@ -3743,7 +3763,6 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
 			   int min_data_size, int data_size,
 			   int empty, u32 min_slot)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct extent_buffer *left = path->nodes[0];
 	struct extent_buffer *right;
 	struct extent_buffer *upper;
@@ -3762,7 +3781,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
 
 	btrfs_assert_tree_locked(path->nodes[1]);
 
-	right = read_node_slot(fs_info, upper, slot + 1);
+	right = read_node_slot(upper, slot + 1);
 	/*
 	 * slot + 1 is not valid or we fail to read the right node,
 	 * no big deal, just return.
@@ -3771,9 +3790,9 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
 		return 1;
 
 	btrfs_tree_lock(right);
-	btrfs_set_lock_blocking(right);
+	btrfs_set_lock_blocking_write(right);
 
-	free_space = btrfs_leaf_free_space(fs_info, right);
+	free_space = btrfs_leaf_free_space(right);
 	if (free_space < data_size)
 		goto out_unlock;
 
@@ -3783,7 +3802,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
 	if (ret)
 		goto out_unlock;
 
-	free_space = btrfs_leaf_free_space(fs_info, right);
+	free_space = btrfs_leaf_free_space(right);
 	if (free_space < data_size)
 		goto out_unlock;
 
@@ -3804,7 +3823,7 @@ static int push_leaf_right(struct btrfs_trans_handle *trans, struct btrfs_root
 		return 0;
 	}
 
-	return __push_leaf_right(fs_info, path, min_data_size, empty,
+	return __push_leaf_right(path, min_data_size, empty,
 				right, free_space, left_nritems, min_slot);
 out_unlock:
 	btrfs_tree_unlock(right);
@@ -3820,12 +3839,12 @@ out_unlock:
  * item at 'max_slot' won't be touched.  Use (u32)-1 to make us do all the
  * items
  */
-static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
-				     struct btrfs_path *path, int data_size,
+static noinline int __push_leaf_left(struct btrfs_path *path, int data_size,
 				     int empty, struct extent_buffer *left,
 				     int free_space, u32 right_nritems,
 				     u32 max_slot)
 {
+	struct btrfs_fs_info *fs_info = left->fs_info;
 	struct btrfs_disk_key disk_key;
 	struct extent_buffer *right = path->nodes[0];
 	int i;
@@ -3853,7 +3872,8 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
 			if (path->slots[0] < i)
 				break;
 			if (path->slots[0] == i) {
-				int space = btrfs_leaf_free_space(fs_info, right);
+				int space = btrfs_leaf_free_space(right);
+
 				if (space + push_space * 2 > free_space)
 					break;
 			}
@@ -3886,7 +3906,7 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
 		     btrfs_item_offset_nr(right, push_items - 1);
 
 	copy_extent_buffer(left, right, BTRFS_LEAF_DATA_OFFSET +
-		     leaf_data_end(fs_info, left) - push_space,
+		     leaf_data_end(left) - push_space,
 		     BTRFS_LEAF_DATA_OFFSET +
 		     btrfs_item_offset_nr(right, push_items - 1),
 		     push_space);
@@ -3913,11 +3933,11 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
 
 	if (push_items < right_nritems) {
 		push_space = btrfs_item_offset_nr(right, push_items - 1) -
-						  leaf_data_end(fs_info, right);
+						  leaf_data_end(right);
 		memmove_extent_buffer(right, BTRFS_LEAF_DATA_OFFSET +
 				      BTRFS_LEAF_DATA_SIZE(fs_info) - push_space,
 				      BTRFS_LEAF_DATA_OFFSET +
-				      leaf_data_end(fs_info, right), push_space);
+				      leaf_data_end(right), push_space);
 
 		memmove_extent_buffer(right, btrfs_item_nr_offset(0),
 			      btrfs_item_nr_offset(push_items),
@@ -3939,7 +3959,7 @@ static noinline int __push_leaf_left(struct btrfs_fs_info *fs_info,
 	if (right_nritems)
 		btrfs_mark_buffer_dirty(right);
 	else
-		clean_tree_block(fs_info, right);
+		btrfs_clean_tree_block(right);
 
 	btrfs_item_key(right, &disk_key, 0);
 	fixup_low_keys(path, &disk_key, 1);
@@ -3976,7 +3996,6 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
 			  *root, struct btrfs_path *path, int min_data_size,
 			  int data_size, int empty, u32 max_slot)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct extent_buffer *right = path->nodes[0];
 	struct extent_buffer *left;
 	int slot;
@@ -3996,7 +4015,7 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
 
 	btrfs_assert_tree_locked(path->nodes[1]);
 
-	left = read_node_slot(fs_info, path->nodes[1], slot - 1);
+	left = read_node_slot(path->nodes[1], slot - 1);
 	/*
 	 * slot - 1 is not valid or we fail to read the left node,
 	 * no big deal, just return.
@@ -4005,9 +4024,9 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
 		return 1;
 
 	btrfs_tree_lock(left);
-	btrfs_set_lock_blocking(left);
+	btrfs_set_lock_blocking_write(left);
 
-	free_space = btrfs_leaf_free_space(fs_info, left);
+	free_space = btrfs_leaf_free_space(left);
 	if (free_space < data_size) {
 		ret = 1;
 		goto out;
@@ -4023,13 +4042,13 @@ static int push_leaf_left(struct btrfs_trans_handle *trans, struct btrfs_root
 		goto out;
 	}
 
-	free_space = btrfs_leaf_free_space(fs_info, left);
+	free_space = btrfs_leaf_free_space(left);
 	if (free_space < data_size) {
 		ret = 1;
 		goto out;
 	}
 
-	return __push_leaf_left(fs_info, path, min_data_size,
+	return __push_leaf_left(path, min_data_size,
 			       empty, left, free_space, right_nritems,
 			       max_slot);
 out:
@@ -4043,12 +4062,12 @@ out:
  * available for the resulting leaf level of the path.
  */
 static noinline void copy_for_split(struct btrfs_trans_handle *trans,
-				    struct btrfs_fs_info *fs_info,
 				    struct btrfs_path *path,
 				    struct extent_buffer *l,
 				    struct extent_buffer *right,
 				    int slot, int mid, int nritems)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	int data_copy_size;
 	int rt_data_off;
 	int i;
@@ -4059,7 +4078,7 @@ static noinline void copy_for_split(struct btrfs_trans_handle *trans,
 
 	nritems = nritems - mid;
 	btrfs_set_header_nritems(right, nritems);
-	data_copy_size = btrfs_item_end_nr(l, mid) - leaf_data_end(fs_info, l);
+	data_copy_size = btrfs_item_end_nr(l, mid) - leaf_data_end(l);
 
 	copy_extent_buffer(right, l, btrfs_item_nr_offset(0),
 			   btrfs_item_nr_offset(mid),
@@ -4068,7 +4087,7 @@ static noinline void copy_for_split(struct btrfs_trans_handle *trans,
 	copy_extent_buffer(right, l,
 		     BTRFS_LEAF_DATA_OFFSET + BTRFS_LEAF_DATA_SIZE(fs_info) -
 		     data_copy_size, BTRFS_LEAF_DATA_OFFSET +
-		     leaf_data_end(fs_info, l), data_copy_size);
+		     leaf_data_end(l), data_copy_size);
 
 	rt_data_off = BTRFS_LEAF_DATA_SIZE(fs_info) - btrfs_item_end_nr(l, mid);
 
@@ -4083,8 +4102,7 @@ static noinline void copy_for_split(struct btrfs_trans_handle *trans,
 
 	btrfs_set_header_nritems(l, mid);
 	btrfs_item_key(right, &disk_key, 0);
-	insert_ptr(trans, fs_info, path, &disk_key, right->start,
-		   path->slots[1] + 1, 1);
+	insert_ptr(trans, path, &disk_key, right->start, path->slots[1] + 1, 1);
 
 	btrfs_mark_buffer_dirty(right);
 	btrfs_mark_buffer_dirty(l);
@@ -4119,7 +4137,6 @@ static noinline int push_for_double_split(struct btrfs_trans_handle *trans,
 					  struct btrfs_path *path,
 					  int data_size)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	int ret;
 	int progress = 0;
 	int slot;
@@ -4128,7 +4145,7 @@ static noinline int push_for_double_split(struct btrfs_trans_handle *trans,
 
 	slot = path->slots[0];
 	if (slot < btrfs_header_nritems(path->nodes[0]))
-		space_needed -= btrfs_leaf_free_space(fs_info, path->nodes[0]);
+		space_needed -= btrfs_leaf_free_space(path->nodes[0]);
 
 	/*
 	 * try to push all the items after our slot into the
@@ -4149,14 +4166,14 @@ static noinline int push_for_double_split(struct btrfs_trans_handle *trans,
 	if (path->slots[0] == 0 || path->slots[0] == nritems)
 		return 0;
 
-	if (btrfs_leaf_free_space(fs_info, path->nodes[0]) >= data_size)
+	if (btrfs_leaf_free_space(path->nodes[0]) >= data_size)
 		return 0;
 
 	/* try to push all the items before our slot into the next leaf */
 	slot = path->slots[0];
 	space_needed = data_size;
 	if (slot > 0)
-		space_needed -= btrfs_leaf_free_space(fs_info, path->nodes[0]);
+		space_needed -= btrfs_leaf_free_space(path->nodes[0]);
 	ret = push_leaf_left(trans, root, path, 1, space_needed, 0, slot);
 	if (ret < 0)
 		return ret;
@@ -4205,7 +4222,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
 		int space_needed = data_size;
 
 		if (slot < btrfs_header_nritems(l))
-			space_needed -= btrfs_leaf_free_space(fs_info, l);
+			space_needed -= btrfs_leaf_free_space(l);
 
 		wret = push_leaf_right(trans, root, path, space_needed,
 				       space_needed, 0, 0);
@@ -4214,8 +4231,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
 		if (wret) {
 			space_needed = data_size;
 			if (slot > 0)
-				space_needed -= btrfs_leaf_free_space(fs_info,
-								      l);
+				space_needed -= btrfs_leaf_free_space(l);
 			wret = push_leaf_left(trans, root, path, space_needed,
 					      space_needed, 0, (u32)-1);
 			if (wret < 0)
@@ -4224,7 +4240,7 @@ static noinline int split_leaf(struct btrfs_trans_handle *trans,
 		l = path->nodes[0];
 
 		/* did the pushes work? */
-		if (btrfs_leaf_free_space(fs_info, l) >= data_size)
+		if (btrfs_leaf_free_space(l) >= data_size)
 			return 0;
 	}
 
@@ -4292,7 +4308,7 @@ again:
 	if (split == 0) {
 		if (mid <= slot) {
 			btrfs_set_header_nritems(right, 0);
-			insert_ptr(trans, fs_info, path, &disk_key,
+			insert_ptr(trans, path, &disk_key,
 				   right->start, path->slots[1] + 1, 1);
 			btrfs_tree_unlock(path->nodes[0]);
 			free_extent_buffer(path->nodes[0]);
@@ -4301,7 +4317,7 @@ again:
 			path->slots[1] += 1;
 		} else {
 			btrfs_set_header_nritems(right, 0);
-			insert_ptr(trans, fs_info, path, &disk_key,
+			insert_ptr(trans, path, &disk_key,
 				   right->start, path->slots[1], 1);
 			btrfs_tree_unlock(path->nodes[0]);
 			free_extent_buffer(path->nodes[0]);
@@ -4318,7 +4334,7 @@ again:
 		return ret;
 	}
 
-	copy_for_split(trans, fs_info, path, l, right, slot, mid, nritems);
+	copy_for_split(trans, path, l, right, slot, mid, nritems);
 
 	if (split == 2) {
 		BUG_ON(num_doubles != 0);
@@ -4331,7 +4347,7 @@ again:
 push_for_double:
 	push_for_double_split(trans, root, path, data_size);
 	tried_avoid_double = 1;
-	if (btrfs_leaf_free_space(fs_info, path->nodes[0]) >= data_size)
+	if (btrfs_leaf_free_space(path->nodes[0]) >= data_size)
 		return 0;
 	goto again;
 }
@@ -4340,7 +4356,6 @@ static noinline int setup_leaf_for_split(struct btrfs_trans_handle *trans,
 					 struct btrfs_root *root,
 					 struct btrfs_path *path, int ins_len)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_key key;
 	struct extent_buffer *leaf;
 	struct btrfs_file_extent_item *fi;
@@ -4354,7 +4369,7 @@ static noinline int setup_leaf_for_split(struct btrfs_trans_handle *trans,
 	BUG_ON(key.type != BTRFS_EXTENT_DATA_KEY &&
 	       key.type != BTRFS_EXTENT_CSUM_KEY);
 
-	if (btrfs_leaf_free_space(fs_info, leaf) >= ins_len)
+	if (btrfs_leaf_free_space(leaf) >= ins_len)
 		return 0;
 
 	item_size = btrfs_item_size_nr(leaf, path->slots[0]);
@@ -4381,7 +4396,7 @@ static noinline int setup_leaf_for_split(struct btrfs_trans_handle *trans,
 		goto err;
 
 	/* the leaf has  changed, it now has room.  return now */
-	if (btrfs_leaf_free_space(fs_info, path->nodes[0]) >= ins_len)
+	if (btrfs_leaf_free_space(path->nodes[0]) >= ins_len)
 		goto err;
 
 	if (key.type == BTRFS_EXTENT_DATA_KEY) {
@@ -4404,8 +4419,7 @@ err:
 	return ret;
 }
 
-static noinline int split_item(struct btrfs_fs_info *fs_info,
-			       struct btrfs_path *path,
+static noinline int split_item(struct btrfs_path *path,
 			       const struct btrfs_key *new_key,
 			       unsigned long split_offset)
 {
@@ -4420,7 +4434,7 @@ static noinline int split_item(struct btrfs_fs_info *fs_info,
 	struct btrfs_disk_key disk_key;
 
 	leaf = path->nodes[0];
-	BUG_ON(btrfs_leaf_free_space(fs_info, leaf) < sizeof(struct btrfs_item));
+	BUG_ON(btrfs_leaf_free_space(leaf) < sizeof(struct btrfs_item));
 
 	btrfs_set_path_blocking(path);
 
@@ -4469,7 +4483,7 @@ static noinline int split_item(struct btrfs_fs_info *fs_info,
 			    item_size - split_offset);
 	btrfs_mark_buffer_dirty(leaf);
 
-	BUG_ON(btrfs_leaf_free_space(fs_info, leaf) < 0);
+	BUG_ON(btrfs_leaf_free_space(leaf) < 0);
 	kfree(buf);
 	return 0;
 }
@@ -4501,7 +4515,7 @@ int btrfs_split_item(struct btrfs_trans_handle *trans,
 	if (ret)
 		return ret;
 
-	ret = split_item(root->fs_info, path, new_key, split_offset);
+	ret = split_item(path, new_key, split_offset);
 	return ret;
 }
 
@@ -4547,8 +4561,7 @@ int btrfs_duplicate_item(struct btrfs_trans_handle *trans,
  * off the end of the item or if we shift the item to chop bytes off
  * the front.
  */
-void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
-			 struct btrfs_path *path, u32 new_size, int from_end)
+void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end)
 {
 	int slot;
 	struct extent_buffer *leaf;
@@ -4571,7 +4584,7 @@ void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
 		return;
 
 	nritems = btrfs_header_nritems(leaf);
-	data_end = leaf_data_end(fs_info, leaf);
+	data_end = leaf_data_end(leaf);
 
 	old_data_start = btrfs_item_offset_nr(leaf, slot);
 
@@ -4637,7 +4650,7 @@ void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
 	btrfs_set_item_size(leaf, item, new_size);
 	btrfs_mark_buffer_dirty(leaf);
 
-	if (btrfs_leaf_free_space(fs_info, leaf) < 0) {
+	if (btrfs_leaf_free_space(leaf) < 0) {
 		btrfs_print_leaf(leaf);
 		BUG();
 	}
@@ -4646,8 +4659,7 @@ void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
 /*
  * make the item pointed to by the path bigger, data_size is the added size.
  */
-void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
-		       u32 data_size)
+void btrfs_extend_item(struct btrfs_path *path, u32 data_size)
 {
 	int slot;
 	struct extent_buffer *leaf;
@@ -4664,9 +4676,9 @@ void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 	leaf = path->nodes[0];
 
 	nritems = btrfs_header_nritems(leaf);
-	data_end = leaf_data_end(fs_info, leaf);
+	data_end = leaf_data_end(leaf);
 
-	if (btrfs_leaf_free_space(fs_info, leaf) < data_size) {
+	if (btrfs_leaf_free_space(leaf) < data_size) {
 		btrfs_print_leaf(leaf);
 		BUG();
 	}
@@ -4676,9 +4688,9 @@ void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 	BUG_ON(slot < 0);
 	if (slot >= nritems) {
 		btrfs_print_leaf(leaf);
-		btrfs_crit(fs_info, "slot %d too large, nritems %d",
+		btrfs_crit(leaf->fs_info, "slot %d too large, nritems %d",
 			   slot, nritems);
-		BUG_ON(1);
+		BUG();
 	}
 
 	/*
@@ -4705,7 +4717,7 @@ void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
 	btrfs_set_item_size(leaf, item, old_size + data_size);
 	btrfs_mark_buffer_dirty(leaf);
 
-	if (btrfs_leaf_free_space(fs_info, leaf) < 0) {
+	if (btrfs_leaf_free_space(leaf) < 0) {
 		btrfs_print_leaf(leaf);
 		BUG();
 	}
@@ -4742,12 +4754,12 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
 	slot = path->slots[0];
 
 	nritems = btrfs_header_nritems(leaf);
-	data_end = leaf_data_end(fs_info, leaf);
+	data_end = leaf_data_end(leaf);
 
-	if (btrfs_leaf_free_space(fs_info, leaf) < total_size) {
+	if (btrfs_leaf_free_space(leaf) < total_size) {
 		btrfs_print_leaf(leaf);
 		btrfs_crit(fs_info, "not enough freespace need %u have %d",
-			   total_size, btrfs_leaf_free_space(fs_info, leaf));
+			   total_size, btrfs_leaf_free_space(leaf));
 		BUG();
 	}
 
@@ -4758,7 +4770,7 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
 			btrfs_print_leaf(leaf);
 			btrfs_crit(fs_info, "slot %d old_data %d data_end %d",
 				   slot, old_data, data_end);
-			BUG_ON(1);
+			BUG();
 		}
 		/*
 		 * item0..itemN ... dataN.offset..dataN.size .. data0.size
@@ -4798,7 +4810,7 @@ void setup_items_for_insert(struct btrfs_root *root, struct btrfs_path *path,
 	btrfs_set_header_nritems(leaf, nritems + nr);
 	btrfs_mark_buffer_dirty(leaf);
 
-	if (btrfs_leaf_free_space(fs_info, leaf) < 0) {
+	if (btrfs_leaf_free_space(leaf) < 0) {
 		btrfs_print_leaf(leaf);
 		BUG();
 	}
@@ -4970,7 +4982,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 	nritems = btrfs_header_nritems(leaf);
 
 	if (slot + nr != nritems) {
-		int data_end = leaf_data_end(fs_info, leaf);
+		int data_end = leaf_data_end(leaf);
 
 		memmove_extent_buffer(leaf, BTRFS_LEAF_DATA_OFFSET +
 			      data_end + dsize,
@@ -5000,7 +5012,7 @@ int btrfs_del_items(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 			btrfs_set_header_level(leaf, 0);
 		} else {
 			btrfs_set_path_blocking(path);
-			clean_tree_block(fs_info, leaf);
+			btrfs_clean_tree_block(leaf);
 			btrfs_del_leaf(trans, root, path, leaf);
 		}
 	} else {
@@ -5130,7 +5142,6 @@ int btrfs_search_forward(struct btrfs_root *root, struct btrfs_key *min_key,
 			 struct btrfs_path *path,
 			 u64 min_trans)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct extent_buffer *cur;
 	struct btrfs_key found_key;
 	int slot;
@@ -5156,6 +5167,10 @@ again:
 		nritems = btrfs_header_nritems(cur);
 		level = btrfs_header_level(cur);
 		sret = btrfs_bin_search(cur, min_key, level, &slot);
+		if (sret < 0) {
+			ret = sret;
+			goto out;
+		}
 
 		/* at the lowest level, we're done, setup the path and exit */
 		if (level == path->lowest_level) {
@@ -5207,7 +5222,7 @@ find_next_key:
 			goto out;
 		}
 		btrfs_set_path_blocking(path);
-		cur = read_node_slot(fs_info, cur, slot);
+		cur = read_node_slot(cur, slot);
 		if (IS_ERR(cur)) {
 			ret = PTR_ERR(cur);
 			goto out;
@@ -5229,14 +5244,12 @@ out:
 	return ret;
 }
 
-static int tree_move_down(struct btrfs_fs_info *fs_info,
-			   struct btrfs_path *path,
-			   int *level)
+static int tree_move_down(struct btrfs_path *path, int *level)
 {
 	struct extent_buffer *eb;
 
 	BUG_ON(*level == 0);
-	eb = read_node_slot(fs_info, path->nodes[*level], path->slots[*level]);
+	eb = read_node_slot(path->nodes[*level], path->slots[*level]);
 	if (IS_ERR(eb))
 		return PTR_ERR(eb);
 
@@ -5276,8 +5289,7 @@ static int tree_move_next_or_upnext(struct btrfs_path *path,
  * Returns 1 if it had to move up and next. 0 is returned if it moved only next
  * or down.
  */
-static int tree_advance(struct btrfs_fs_info *fs_info,
-			struct btrfs_path *path,
+static int tree_advance(struct btrfs_path *path,
 			int *level, int root_level,
 			int allow_down,
 			struct btrfs_key *key)
@@ -5287,7 +5299,7 @@ static int tree_advance(struct btrfs_fs_info *fs_info,
 	if (*level == 0 || !allow_down) {
 		ret = tree_move_next_or_upnext(path, level, root_level);
 	} else {
-		ret = tree_move_down(fs_info, path, level);
+		ret = tree_move_down(path, level);
 	}
 	if (ret >= 0) {
 		if (*level == 0)
@@ -5464,7 +5476,7 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
 
 	while (1) {
 		if (advance_left && !left_end_reached) {
-			ret = tree_advance(fs_info, left_path, &left_level,
+			ret = tree_advance(left_path, &left_level,
 					left_root_level,
 					advance_left != ADVANCE_ONLY_NEXT,
 					&left_key);
@@ -5475,7 +5487,7 @@ int btrfs_compare_trees(struct btrfs_root *left_root,
 			advance_left = 0;
 		}
 		if (advance_right && !right_end_reached) {
-			ret = tree_advance(fs_info, right_path, &right_level,
+			ret = tree_advance(right_path, &right_level,
 					right_root_level,
 					advance_right != ADVANCE_ONLY_NEXT,
 					&right_key);
diff --git a/fs/btrfs/ctree.h b/fs/btrfs/ctree.h
index 7a2a2621f0d9..0a61dff27f57 100644
--- a/fs/btrfs/ctree.h
+++ b/fs/btrfs/ctree.h
@@ -41,6 +41,7 @@ extern struct kmem_cache *btrfs_bit_radix_cachep;
 extern struct kmem_cache *btrfs_path_cachep;
 extern struct kmem_cache *btrfs_free_space_cachep;
 struct btrfs_ordered_sum;
+struct btrfs_ref;
 
 #define BTRFS_MAGIC 0x4D5F53665248425FULL /* ascii _BHRfS_M, no null */
 
@@ -934,7 +935,8 @@ struct btrfs_fs_info {
 
 	spinlock_t delayed_iput_lock;
 	struct list_head delayed_iputs;
-	struct mutex cleaner_delayed_iput_mutex;
+	atomic_t nr_delayed_iputs;
+	wait_queue_head_t delayed_iputs_wait;
 
 	/* this protects tree_mod_seq_list */
 	spinlock_t tree_mod_seq_lock;
@@ -1014,6 +1016,7 @@ struct btrfs_fs_info {
 	/* used to keep from writing metadata until there is a nice batch */
 	struct percpu_counter dirty_metadata_bytes;
 	struct percpu_counter delalloc_bytes;
+	struct percpu_counter dio_bytes;
 	s32 dirty_metadata_batch;
 	s32 delalloc_batch;
 
@@ -1074,10 +1077,13 @@ struct btrfs_fs_info {
 	atomic_t scrubs_paused;
 	atomic_t scrub_cancel_req;
 	wait_queue_head_t scrub_pause_wait;
-	int scrub_workers_refcnt;
+	/*
+	 * The worker pointers are NULL iff the refcount is 0, ie. scrub is not
+	 * running.
+	 */
+	refcount_t scrub_workers_refcnt;
 	struct btrfs_workqueue *scrub_workers;
 	struct btrfs_workqueue *scrub_wr_completion_workers;
-	struct btrfs_workqueue *scrub_nocow_workers;
 	struct btrfs_workqueue *scrub_parity_workers;
 
 #ifdef CONFIG_BTRFS_FS_CHECK_INTEGRITY
@@ -1088,10 +1094,7 @@ struct btrfs_fs_info {
 
 	/* holds configuration and tracking. Protected by qgroup_lock */
 	struct rb_root qgroup_tree;
-	struct rb_root qgroup_op_tree;
 	spinlock_t qgroup_lock;
-	spinlock_t qgroup_op_lock;
-	atomic_t qgroup_op_seq;
 
 	/*
 	 * used to avoid frequently calling ulist_alloc()/ulist_free()
@@ -1148,12 +1151,6 @@ struct btrfs_fs_info {
 	struct mutex unused_bg_unpin_mutex;
 	struct mutex delete_unused_bgs_mutex;
 
-	/*
-	 * Chunks that can't be freed yet (under a trim/discard operation)
-	 * and will be latter freed. Protected by fs_info->chunk_mutex.
-	 */
-	struct list_head pinned_chunks;
-
 	/* Cached block sizes */
 	u32 nodesize;
 	u32 sectorsize;
@@ -1199,6 +1196,26 @@ enum {
 	BTRFS_ROOT_MULTI_LOG_TASKS,
 	BTRFS_ROOT_DIRTY,
 	BTRFS_ROOT_DELETING,
+
+	/*
+	 * Reloc tree is orphan, only kept here for qgroup delayed subtree scan
+	 *
+	 * Set for the subvolume tree owning the reloc tree.
+	 */
+	BTRFS_ROOT_DEAD_RELOC_TREE,
+	/* Mark dead root stored on device whose cleanup needs to be resumed */
+	BTRFS_ROOT_DEAD_TREE,
+};
+
+/*
+ * Record swapped tree blocks of a subvolume tree for delayed subtree trace
+ * code. For detail check comment in fs/btrfs/qgroup.c.
+ */
+struct btrfs_qgroup_swapped_blocks {
+	spinlock_t lock;
+	/* RM_EMPTY_ROOT() of above blocks[] */
+	bool swapped;
+	struct rb_root blocks[BTRFS_MAX_LEVEL];
 };
 
 /*
@@ -1312,10 +1329,24 @@ struct btrfs_root {
 	u64 nr_ordered_extents;
 
 	/*
+	 * Not empty if this subvolume root has gone through tree block swap
+	 * (relocation)
+	 *
+	 * Will be used by reloc_control::dirty_subvol_roots.
+	 */
+	struct list_head reloc_dirty_list;
+
+	/*
 	 * Number of currently running SEND ioctls to prevent
 	 * manipulation with the read-only status via SUBVOL_SETFLAGS
 	 */
 	int send_in_progress;
+	/*
+	 * Number of currently running deduplication operations that have a
+	 * destination inode belonging to this root. Protected by the lock
+	 * root_item_lock.
+	 */
+	int dedupe_in_progress;
 	struct btrfs_subvolume_writers *subv_writers;
 	atomic_t will_be_snapshotted;
 	atomic_t snapshot_force_cow;
@@ -1328,6 +1359,9 @@ struct btrfs_root {
 	/* Number of active swapfiles */
 	atomic_t nr_swapfiles;
 
+	/* Record pairs of swapped blocks for qgroup */
+	struct btrfs_qgroup_swapped_blocks swapped_blocks;
+
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 	u64 alloc_bytenr;
 #endif
@@ -1505,6 +1539,21 @@ do {                                                                   \
 
 #define BTRFS_INODE_ROOT_ITEM_INIT	(1 << 31)
 
+#define BTRFS_INODE_FLAG_MASK						\
+	(BTRFS_INODE_NODATASUM |					\
+	 BTRFS_INODE_NODATACOW |					\
+	 BTRFS_INODE_READONLY |						\
+	 BTRFS_INODE_NOCOMPRESS |					\
+	 BTRFS_INODE_PREALLOC |						\
+	 BTRFS_INODE_SYNC |						\
+	 BTRFS_INODE_IMMUTABLE |					\
+	 BTRFS_INODE_APPEND |						\
+	 BTRFS_INODE_NODUMP |						\
+	 BTRFS_INODE_NOATIME |						\
+	 BTRFS_INODE_DIRSYNC |						\
+	 BTRFS_INODE_COMPRESS |						\
+	 BTRFS_INODE_ROOT_ITEM_INIT)
+
 struct btrfs_map_token {
 	const struct extent_buffer *eb;
 	char *kaddr;
@@ -2128,18 +2177,16 @@ static inline int btrfs_header_flag(const struct extent_buffer *eb, u64 flag)
 	return (btrfs_header_flags(eb) & flag) == flag;
 }
 
-static inline int btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
+static inline void btrfs_set_header_flag(struct extent_buffer *eb, u64 flag)
 {
 	u64 flags = btrfs_header_flags(eb);
 	btrfs_set_header_flags(eb, flags | flag);
-	return (flags & flag) == flag;
 }
 
-static inline int btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
+static inline void btrfs_clear_header_flag(struct extent_buffer *eb, u64 flag)
 {
 	u64 flags = btrfs_header_flags(eb);
 	btrfs_set_header_flags(eb, flags & ~flag);
-	return (flags & flag) == flag;
 }
 
 static inline int btrfs_header_backref_rev(const struct extent_buffer *eb)
@@ -2410,13 +2457,12 @@ static inline int btrfs_super_csum_size(const struct btrfs_super_block *s)
  * this returns the address of the start of the last item,
  * which is the stop of the leaf data stack
  */
-static inline unsigned int leaf_data_end(const struct btrfs_fs_info *fs_info,
-					 const struct extent_buffer *leaf)
+static inline unsigned int leaf_data_end(const struct extent_buffer *leaf)
 {
 	u32 nr = btrfs_header_nritems(leaf);
 
 	if (nr == 0)
-		return BTRFS_LEAF_DATA_SIZE(fs_info);
+		return BTRFS_LEAF_DATA_SIZE(leaf->fs_info);
 	return btrfs_item_offset_nr(leaf, nr - 1);
 }
 
@@ -2663,8 +2709,6 @@ void btrfs_wait_nocow_writers(struct btrfs_block_group_cache *bg);
 void btrfs_put_block_group(struct btrfs_block_group_cache *cache);
 int btrfs_run_delayed_refs(struct btrfs_trans_handle *trans,
 			   unsigned long count);
-int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
-				 unsigned long count, u64 transid, int wait);
 void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
 				  struct btrfs_delayed_ref_root *delayed_refs,
 				  struct btrfs_delayed_ref_head *head);
@@ -2676,8 +2720,7 @@ int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
 		     u64 bytenr, u64 num, int reserved);
 int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
 				    u64 bytenr, u64 num_bytes);
-int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
-				 struct extent_buffer *eb);
+int btrfs_exclude_logged_extents(struct extent_buffer *eb);
 int btrfs_cross_ref_exist(struct btrfs_root *root,
 			  u64 objectid, u64 offset, u64 bytenr);
 struct btrfs_block_group_cache *btrfs_lookup_block_group(
@@ -2710,13 +2753,9 @@ int btrfs_inc_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 		  struct extent_buffer *buf, int full_backref);
 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
-				struct btrfs_fs_info *fs_info,
 				u64 bytenr, u64 num_bytes, u64 flags,
 				int level, int is_data);
-int btrfs_free_extent(struct btrfs_trans_handle *trans,
-		      struct btrfs_root *root,
-		      u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
-		      u64 owner, u64 offset);
+int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref);
 
 int btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
 			       u64 start, u64 len, int delalloc);
@@ -2725,15 +2764,11 @@ int btrfs_free_and_pin_reserved_extent(struct btrfs_fs_info *fs_info,
 void btrfs_prepare_extent_commit(struct btrfs_fs_info *fs_info);
 int btrfs_finish_extent_commit(struct btrfs_trans_handle *trans);
 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
-			 struct btrfs_root *root,
-			 u64 bytenr, u64 num_bytes, u64 parent,
-			 u64 root_objectid, u64 owner, u64 offset);
+			 struct btrfs_ref *generic_ref);
 
 int btrfs_start_dirty_block_groups(struct btrfs_trans_handle *trans);
-int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
-				   struct btrfs_fs_info *fs_info);
-int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
-			    struct btrfs_fs_info *fs_info);
+int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans);
+int btrfs_setup_space_cache(struct btrfs_trans_handle *trans);
 int btrfs_extent_readonly(struct btrfs_fs_info *fs_info, u64 bytenr);
 int btrfs_free_block_groups(struct btrfs_fs_info *info);
 int btrfs_read_block_groups(struct btrfs_fs_info *info);
@@ -2775,7 +2810,8 @@ enum btrfs_flush_state {
 	FLUSH_DELALLOC		=	5,
 	FLUSH_DELALLOC_WAIT	=	6,
 	ALLOC_CHUNK		=	7,
-	COMMIT_TRANS		=	8,
+	ALLOC_CHUNK_FORCE	=	8,
+	COMMIT_TRANS		=	9,
 };
 
 int btrfs_alloc_data_chunk_ondemand(struct btrfs_inode *inode, u64 bytes);
@@ -2900,10 +2936,8 @@ int btrfs_copy_root(struct btrfs_trans_handle *trans,
 		      struct extent_buffer **cow_ret, u64 new_root_objectid);
 int btrfs_block_can_be_shared(struct btrfs_root *root,
 			      struct extent_buffer *buf);
-void btrfs_extend_item(struct btrfs_fs_info *fs_info, struct btrfs_path *path,
-		       u32 data_size);
-void btrfs_truncate_item(struct btrfs_fs_info *fs_info,
-			 struct btrfs_path *path, u32 new_size, int from_end);
+void btrfs_extend_item(struct btrfs_path *path, u32 data_size);
+void btrfs_truncate_item(struct btrfs_path *path, u32 new_size, int from_end);
 int btrfs_split_item(struct btrfs_trans_handle *trans,
 		     struct btrfs_root *root,
 		     struct btrfs_path *path,
@@ -2979,8 +3013,7 @@ static inline int btrfs_next_item(struct btrfs_root *root, struct btrfs_path *p)
 {
 	return btrfs_next_old_item(root, p, 0);
 }
-int btrfs_leaf_free_space(struct btrfs_fs_info *fs_info,
-			  struct extent_buffer *leaf);
+int btrfs_leaf_free_space(struct extent_buffer *leaf);
 int __must_check btrfs_drop_snapshot(struct btrfs_root *root,
 				     struct btrfs_block_rsv *block_rsv,
 				     int update_ref, int for_reloc);
@@ -3181,8 +3214,7 @@ void btrfs_extent_item_to_extent_map(struct btrfs_inode *inode,
 
 /* inode.c */
 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
-		struct page *page, size_t pg_offset, u64 start,
-		u64 len, int create);
+					   u64 start, u64 len);
 noinline int can_nocow_extent(struct inode *inode, u64 offset, u64 *len,
 			      u64 *orig_start, u64 *orig_block_len,
 			      u64 *ram_bytes);
@@ -3232,6 +3264,7 @@ void btrfs_evict_inode(struct inode *inode);
 int btrfs_write_inode(struct inode *inode, struct writeback_control *wbc);
 struct inode *btrfs_alloc_inode(struct super_block *sb);
 void btrfs_destroy_inode(struct inode *inode);
+void btrfs_free_inode(struct inode *inode);
 int btrfs_drop_inode(struct inode *inode);
 int __init btrfs_init_cachep(void);
 void __cold btrfs_destroy_cachep(void);
@@ -3254,6 +3287,7 @@ int btrfs_orphan_cleanup(struct btrfs_root *root);
 int btrfs_cont_expand(struct inode *inode, loff_t oldsize, loff_t size);
 void btrfs_add_delayed_iput(struct inode *inode);
 void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info);
+int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info);
 int btrfs_prealloc_file_range(struct inode *inode, int mode,
 			      u64 start, u64 num_bytes, u64 min_size,
 			      loff_t actual_len, u64 *alloc_hint);
@@ -3261,7 +3295,7 @@ int btrfs_prealloc_file_range_trans(struct inode *inode,
 				    struct btrfs_trans_handle *trans, int mode,
 				    u64 start, u64 num_bytes, u64 min_size,
 				    loff_t actual_len, u64 *alloc_hint);
-int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
+int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
 		u64 start, u64 end, int *page_started, unsigned long *nr_written,
 		struct writeback_control *wbc);
 int btrfs_writepage_cow_fixup(struct page *page, u64 start, u64 end);
@@ -3415,31 +3449,17 @@ void btrfs_printk(const struct btrfs_fs_info *fs_info, const char *fmt, ...);
 
 #if defined(CONFIG_DYNAMIC_DEBUG)
 #define btrfs_debug(fs_info, fmt, args...)				\
-do {									\
-        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);         	\
-        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))  	\
-		btrfs_printk(fs_info, KERN_DEBUG fmt, ##args);		\
-} while (0)
-#define btrfs_debug_in_rcu(fs_info, fmt, args...) 			\
-do {									\
-        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt); 	        \
-        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT)) 		\
-		btrfs_printk_in_rcu(fs_info, KERN_DEBUG fmt, ##args);	\
-} while (0)
+	_dynamic_func_call_no_desc(fmt, btrfs_printk,			\
+				   fs_info, KERN_DEBUG fmt, ##args)
+#define btrfs_debug_in_rcu(fs_info, fmt, args...)			\
+	_dynamic_func_call_no_desc(fmt, btrfs_printk_in_rcu,		\
+				   fs_info, KERN_DEBUG fmt, ##args)
 #define btrfs_debug_rl_in_rcu(fs_info, fmt, args...)			\
-do {									\
-        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);         	\
-        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))  	\
-		btrfs_printk_rl_in_rcu(fs_info, KERN_DEBUG fmt,		\
-				       ##args);\
-} while (0)
-#define btrfs_debug_rl(fs_info, fmt, args...) 				\
-do {									\
-        DEFINE_DYNAMIC_DEBUG_METADATA(descriptor, fmt);         	\
-        if (unlikely(descriptor.flags & _DPRINTK_FLAGS_PRINT))  	\
-		btrfs_printk_ratelimited(fs_info, KERN_DEBUG fmt,	\
-					 ##args);			\
-} while (0)
+	_dynamic_func_call_no_desc(fmt, btrfs_printk_rl_in_rcu,		\
+				   fs_info, KERN_DEBUG fmt, ##args)
+#define btrfs_debug_rl(fs_info, fmt, args...)				\
+	_dynamic_func_call_no_desc(fmt, btrfs_printk_ratelimited,	\
+				   fs_info, KERN_DEBUG fmt, ##args)
 #elif defined(DEBUG)
 #define btrfs_debug(fs_info, fmt, args...) \
 	btrfs_printk(fs_info, KERN_DEBUG fmt, ##args)
@@ -3490,21 +3510,18 @@ do {								\
 	rcu_read_unlock();					\
 } while (0)
 
-#ifdef CONFIG_BTRFS_ASSERT
-
 __cold
 static inline void assfail(const char *expr, const char *file, int line)
 {
-	pr_err("assertion failed: %s, file: %s, line: %d\n",
-	       expr, file, line);
-	BUG();
+	if (IS_ENABLED(CONFIG_BTRFS_ASSERT)) {
+		pr_err("assertion failed: %s, file: %s, line: %d\n",
+		       expr, file, line);
+		BUG();
+	}
 }
 
 #define ASSERT(expr)	\
 	(likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
-#else
-#define ASSERT(expr)	((void)0)
-#endif
 
 /*
  * Use that for functions that are conditionally exported for sanity tests but
@@ -3736,8 +3753,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 void btrfs_scrub_pause(struct btrfs_fs_info *fs_info);
 void btrfs_scrub_continue(struct btrfs_fs_info *fs_info);
 int btrfs_scrub_cancel(struct btrfs_fs_info *info);
-int btrfs_scrub_cancel_dev(struct btrfs_fs_info *info,
-			   struct btrfs_device *dev);
+int btrfs_scrub_cancel_dev(struct btrfs_device *dev);
 int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
 			 struct btrfs_scrub_progress *progress);
 static inline void btrfs_init_full_stripe_locks_tree(
@@ -3786,6 +3802,8 @@ static inline int btrfs_defrag_cancelled(struct btrfs_fs_info *fs_info)
 	return signal_pending(current);
 }
 
+#define in_range(b, first, len) ((b) >= (first) && (b) < (first) + (len))
+
 /* Sanity test specific functions */
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 void btrfs_test_inode_set_ops(struct inode *inode);
diff --git a/fs/btrfs/delayed-inode.c b/fs/btrfs/delayed-inode.c
index c669f250d4a0..43fdb2992956 100644
--- a/fs/btrfs/delayed-inode.c
+++ b/fs/btrfs/delayed-inode.c
@@ -691,7 +691,6 @@ static int btrfs_batch_insert_items(struct btrfs_root *root,
 				    struct btrfs_path *path,
 				    struct btrfs_delayed_item *item)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_delayed_item *curr, *next;
 	int free_space;
 	int total_data_size = 0, total_size = 0;
@@ -708,7 +707,7 @@ static int btrfs_batch_insert_items(struct btrfs_root *root,
 	BUG_ON(!path->nodes[0]);
 
 	leaf = path->nodes[0];
-	free_space = btrfs_leaf_free_space(fs_info, leaf);
+	free_space = btrfs_leaf_free_space(leaf);
 	INIT_LIST_HEAD(&head);
 
 	next = item;
@@ -1692,7 +1691,7 @@ int btrfs_readdir_delayed_dir_index(struct dir_context *ctx,
 		name = (char *)(di + 1);
 		name_len = btrfs_stack_dir_name_len(di);
 
-		d_type = btrfs_filetype_table[di->type];
+		d_type = fs_ftype_to_dtype(di->type);
 		btrfs_disk_key_to_cpu(&location, &di->location);
 
 		over = !dir_emit(ctx, name, name_len,
diff --git a/fs/btrfs/delayed-ref.c b/fs/btrfs/delayed-ref.c
index cad36c99a483..a73fc23e2961 100644
--- a/fs/btrfs/delayed-ref.c
+++ b/fs/btrfs/delayed-ref.c
@@ -602,17 +602,14 @@ static void init_delayed_ref_head(struct btrfs_delayed_ref_head *head_ref,
 	RB_CLEAR_NODE(&head_ref->href_node);
 	head_ref->processing = 0;
 	head_ref->total_ref_mod = count_mod;
-	head_ref->qgroup_reserved = 0;
-	head_ref->qgroup_ref_root = 0;
 	spin_lock_init(&head_ref->lock);
 	mutex_init(&head_ref->mutex);
 
 	if (qrecord) {
 		if (ref_root && reserved) {
-			head_ref->qgroup_ref_root = ref_root;
-			head_ref->qgroup_reserved = reserved;
+			qrecord->data_rsv = reserved;
+			qrecord->data_rsv_refroot = ref_root;
 		}
-
 		qrecord->bytenr = bytenr;
 		qrecord->num_bytes = num_bytes;
 		qrecord->old_roots = NULL;
@@ -651,10 +648,6 @@ add_delayed_ref_head(struct btrfs_trans_handle *trans,
 	existing = htree_insert(&delayed_refs->href_root,
 				&head_ref->href_node);
 	if (existing) {
-		WARN_ON(qrecord && head_ref->qgroup_ref_root
-			&& head_ref->qgroup_reserved
-			&& existing->qgroup_ref_root
-			&& existing->qgroup_reserved);
 		update_existing_head_ref(trans, existing, head_ref,
 					 old_ref_mod);
 		/*
@@ -742,8 +735,7 @@ static void init_delayed_ref_common(struct btrfs_fs_info *fs_info,
  * transaction commits.
  */
 int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
-			       u64 bytenr, u64 num_bytes, u64 parent,
-			       u64 ref_root,  int level, int action,
+			       struct btrfs_ref *generic_ref,
 			       struct btrfs_delayed_extent_op *extent_op,
 			       int *old_ref_mod, int *new_ref_mod)
 {
@@ -753,10 +745,18 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
 	struct btrfs_delayed_ref_root *delayed_refs;
 	struct btrfs_qgroup_extent_record *record = NULL;
 	int qrecord_inserted;
-	bool is_system = (ref_root == BTRFS_CHUNK_TREE_OBJECTID);
+	bool is_system;
+	int action = generic_ref->action;
+	int level = generic_ref->tree_ref.level;
 	int ret;
+	u64 bytenr = generic_ref->bytenr;
+	u64 num_bytes = generic_ref->len;
+	u64 parent = generic_ref->parent;
 	u8 ref_type;
 
+	is_system = (generic_ref->real_root == BTRFS_CHUNK_TREE_OBJECTID);
+
+	ASSERT(generic_ref->type == BTRFS_REF_METADATA && generic_ref->action);
 	BUG_ON(extent_op && extent_op->is_data);
 	ref = kmem_cache_alloc(btrfs_delayed_tree_ref_cachep, GFP_NOFS);
 	if (!ref)
@@ -769,8 +769,10 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
 	}
 
 	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
-	    is_fstree(ref_root)) {
-		record = kmalloc(sizeof(*record), GFP_NOFS);
+	    is_fstree(generic_ref->real_root) &&
+	    is_fstree(generic_ref->tree_ref.root) &&
+	    !generic_ref->skip_qgroup) {
+		record = kzalloc(sizeof(*record), GFP_NOFS);
 		if (!record) {
 			kmem_cache_free(btrfs_delayed_tree_ref_cachep, ref);
 			kmem_cache_free(btrfs_delayed_ref_head_cachep, head_ref);
@@ -784,13 +786,14 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
 		ref_type = BTRFS_TREE_BLOCK_REF_KEY;
 
 	init_delayed_ref_common(fs_info, &ref->node, bytenr, num_bytes,
-				ref_root, action, ref_type);
-	ref->root = ref_root;
+				generic_ref->tree_ref.root, action, ref_type);
+	ref->root = generic_ref->tree_ref.root;
 	ref->parent = parent;
 	ref->level = level;
 
 	init_delayed_ref_head(head_ref, record, bytenr, num_bytes,
-			      ref_root, 0, action, false, is_system);
+			      generic_ref->tree_ref.root, 0, action, false,
+			      is_system);
 	head_ref->extent_op = extent_op;
 
 	delayed_refs = &trans->transaction->delayed_refs;
@@ -829,10 +832,9 @@ int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
  * add a delayed data ref. it's similar to btrfs_add_delayed_tree_ref.
  */
 int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
-			       u64 bytenr, u64 num_bytes,
-			       u64 parent, u64 ref_root,
-			       u64 owner, u64 offset, u64 reserved, int action,
-			       int *old_ref_mod, int *new_ref_mod)
+			       struct btrfs_ref *generic_ref,
+			       u64 reserved, int *old_ref_mod,
+			       int *new_ref_mod)
 {
 	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_delayed_data_ref *ref;
@@ -840,9 +842,17 @@ int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
 	struct btrfs_delayed_ref_root *delayed_refs;
 	struct btrfs_qgroup_extent_record *record = NULL;
 	int qrecord_inserted;
+	int action = generic_ref->action;
 	int ret;
+	u64 bytenr = generic_ref->bytenr;
+	u64 num_bytes = generic_ref->len;
+	u64 parent = generic_ref->parent;
+	u64 ref_root = generic_ref->data_ref.ref_root;
+	u64 owner = generic_ref->data_ref.ino;
+	u64 offset = generic_ref->data_ref.offset;
 	u8 ref_type;
 
+	ASSERT(generic_ref->type == BTRFS_REF_DATA && action);
 	ref = kmem_cache_alloc(btrfs_delayed_data_ref_cachep, GFP_NOFS);
 	if (!ref)
 		return -ENOMEM;
@@ -866,8 +876,10 @@ int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
 	}
 
 	if (test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags) &&
-	    is_fstree(ref_root)) {
-		record = kmalloc(sizeof(*record), GFP_NOFS);
+	    is_fstree(ref_root) &&
+	    is_fstree(generic_ref->real_root) &&
+	    !generic_ref->skip_qgroup) {
+		record = kzalloc(sizeof(*record), GFP_NOFS);
 		if (!record) {
 			kmem_cache_free(btrfs_delayed_data_ref_cachep, ref);
 			kmem_cache_free(btrfs_delayed_ref_head_cachep,
@@ -912,8 +924,7 @@ int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
 	return 0;
 }
 
-int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
-				struct btrfs_trans_handle *trans,
+int btrfs_add_delayed_extent_op(struct btrfs_trans_handle *trans,
 				u64 bytenr, u64 num_bytes,
 				struct btrfs_delayed_extent_op *extent_op)
 {
diff --git a/fs/btrfs/delayed-ref.h b/fs/btrfs/delayed-ref.h
index d2af974f68a1..c18f93ea88ed 100644
--- a/fs/btrfs/delayed-ref.h
+++ b/fs/btrfs/delayed-ref.h
@@ -103,17 +103,6 @@ struct btrfs_delayed_ref_head {
 	int ref_mod;
 
 	/*
-	 * For qgroup reserved space freeing.
-	 *
-	 * ref_root and reserved will be recorded after
-	 * BTRFS_ADD_DELAYED_EXTENT is called.
-	 * And will be used to free reserved qgroup space at
-	 * run_delayed_refs() time.
-	 */
-	u64 qgroup_ref_root;
-	u64 qgroup_reserved;
-
-	/*
 	 * when a new extent is allocated, it is just reserved in memory
 	 * The actual extent isn't inserted into the extent allocation tree
 	 * until the delayed ref is processed.  must_insert_reserved is
@@ -187,6 +176,83 @@ struct btrfs_delayed_ref_root {
 	u64 qgroup_to_skip;
 };
 
+enum btrfs_ref_type {
+	BTRFS_REF_NOT_SET,
+	BTRFS_REF_DATA,
+	BTRFS_REF_METADATA,
+	BTRFS_REF_LAST,
+};
+
+struct btrfs_data_ref {
+	/* For EXTENT_DATA_REF */
+
+	/* Root which refers to this data extent */
+	u64 ref_root;
+
+	/* Inode which refers to this data extent */
+	u64 ino;
+
+	/*
+	 * file_offset - extent_offset
+	 *
+	 * file_offset is the key.offset of the EXTENT_DATA key.
+	 * extent_offset is btrfs_file_extent_offset() of the EXTENT_DATA data.
+	 */
+	u64 offset;
+};
+
+struct btrfs_tree_ref {
+	/*
+	 * Level of this tree block
+	 *
+	 * Shared for skinny (TREE_BLOCK_REF) and normal tree ref.
+	 */
+	int level;
+
+	/*
+	 * Root which refers to this tree block.
+	 *
+	 * For TREE_BLOCK_REF (skinny metadata, either inline or keyed)
+	 */
+	u64 root;
+
+	/* For non-skinny metadata, no special member needed */
+};
+
+struct btrfs_ref {
+	enum btrfs_ref_type type;
+	int action;
+
+	/*
+	 * Whether this extent should go through qgroup record.
+	 *
+	 * Normally false, but for certain cases like delayed subtree scan,
+	 * setting this flag can hugely reduce qgroup overhead.
+	 */
+	bool skip_qgroup;
+
+	/*
+	 * Optional. For which root is this modification.
+	 * Mostly used for qgroup optimization.
+	 *
+	 * When unset, data/tree ref init code will populate it.
+	 * In certain cases, we're modifying reference for a different root.
+	 * E.g. COW fs tree blocks for balance.
+	 * In that case, tree_ref::root will be fs tree, but we're doing this
+	 * for reloc tree, then we should set @real_root to reloc tree.
+	 */
+	u64 real_root;
+	u64 bytenr;
+	u64 len;
+
+	/* Bytenr of the parent tree block */
+	u64 parent;
+	union {
+		struct btrfs_data_ref data_ref;
+		struct btrfs_tree_ref tree_ref;
+	};
+};
+
 extern struct kmem_cache *btrfs_delayed_ref_head_cachep;
 extern struct kmem_cache *btrfs_delayed_tree_ref_cachep;
 extern struct kmem_cache *btrfs_delayed_data_ref_cachep;
@@ -195,6 +261,38 @@ extern struct kmem_cache *btrfs_delayed_extent_op_cachep;
 int __init btrfs_delayed_ref_init(void);
 void __cold btrfs_delayed_ref_exit(void);
 
+static inline void btrfs_init_generic_ref(struct btrfs_ref *generic_ref,
+				int action, u64 bytenr, u64 len, u64 parent)
+{
+	generic_ref->action = action;
+	generic_ref->bytenr = bytenr;
+	generic_ref->len = len;
+	generic_ref->parent = parent;
+}
+
+static inline void btrfs_init_tree_ref(struct btrfs_ref *generic_ref,
+				int level, u64 root)
+{
+	/* If @real_root not set, use @root as fallback */
+	if (!generic_ref->real_root)
+		generic_ref->real_root = root;
+	generic_ref->tree_ref.level = level;
+	generic_ref->tree_ref.root = root;
+	generic_ref->type = BTRFS_REF_METADATA;
+}
+
+static inline void btrfs_init_data_ref(struct btrfs_ref *generic_ref,
+				u64 ref_root, u64 ino, u64 offset)
+{
+	/* If @real_root not set, use @root as fallback */
+	if (!generic_ref->real_root)
+		generic_ref->real_root = ref_root;
+	generic_ref->data_ref.ref_root = ref_root;
+	generic_ref->data_ref.ino = ino;
+	generic_ref->data_ref.offset = offset;
+	generic_ref->type = BTRFS_REF_DATA;
+}
+
 static inline struct btrfs_delayed_extent_op *
 btrfs_alloc_delayed_extent_op(void)
 {
@@ -235,17 +333,14 @@ static inline void btrfs_put_delayed_ref_head(struct btrfs_delayed_ref_head *hea
 }
 
 int btrfs_add_delayed_tree_ref(struct btrfs_trans_handle *trans,
-			       u64 bytenr, u64 num_bytes, u64 parent,
-			       u64 ref_root, int level, int action,
+			       struct btrfs_ref *generic_ref,
 			       struct btrfs_delayed_extent_op *extent_op,
 			       int *old_ref_mod, int *new_ref_mod);
 int btrfs_add_delayed_data_ref(struct btrfs_trans_handle *trans,
-			       u64 bytenr, u64 num_bytes,
-			       u64 parent, u64 ref_root,
-			       u64 owner, u64 offset, u64 reserved, int action,
-			       int *old_ref_mod, int *new_ref_mod);
-int btrfs_add_delayed_extent_op(struct btrfs_fs_info *fs_info,
-				struct btrfs_trans_handle *trans,
+			       struct btrfs_ref *generic_ref,
+			       u64 reserved, int *old_ref_mod,
+			       int *new_ref_mod);
+int btrfs_add_delayed_extent_op(struct btrfs_trans_handle *trans,
 				u64 bytenr, u64 num_bytes,
 				struct btrfs_delayed_extent_op *extent_op);
 void btrfs_merge_delayed_refs(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/dev-replace.c b/fs/btrfs/dev-replace.c
index 8750c835f535..ee0989c7e3a9 100644
--- a/fs/btrfs/dev-replace.c
+++ b/fs/btrfs/dev-replace.c
@@ -111,11 +111,11 @@ no_valid_dev_replace_entry_found:
 		break;
 	case BTRFS_IOCTL_DEV_REPLACE_STATE_STARTED:
 	case BTRFS_IOCTL_DEV_REPLACE_STATE_SUSPENDED:
-		dev_replace->srcdev = btrfs_find_device(fs_info, src_devid,
-							NULL, NULL);
-		dev_replace->tgtdev = btrfs_find_device(fs_info,
+		dev_replace->srcdev = btrfs_find_device(fs_info->fs_devices,
+						src_devid, NULL, NULL, true);
+		dev_replace->tgtdev = btrfs_find_device(fs_info->fs_devices,
 							BTRFS_DEV_REPLACE_DEVID,
-							NULL, NULL);
+							NULL, NULL, true);
 		/*
 		 * allow 'btrfs dev replace_cancel' if src/tgt device is
 		 * missing
@@ -273,9 +273,9 @@ error:
  * called from commit_transaction. Writes changed device replace state to
  * disk.
  */
-int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
-			  struct btrfs_fs_info *fs_info)
+int btrfs_run_dev_replace(struct btrfs_trans_handle *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	int ret;
 	struct btrfs_root *dev_root = fs_info->dev_root;
 	struct btrfs_path *path;
@@ -603,17 +603,33 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
 	}
 	btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
 
-	trans = btrfs_start_transaction(root, 0);
-	if (IS_ERR(trans)) {
-		mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
-		return PTR_ERR(trans);
+	/*
+	 * We have to use this loop approach because at this point src_device
+	 * has to be available for transaction commit to complete, yet new
+	 * chunks shouldn't be allocated on the device.
+	 */
+	while (1) {
+		trans = btrfs_start_transaction(root, 0);
+		if (IS_ERR(trans)) {
+			mutex_unlock(&dev_replace->lock_finishing_cancel_unmount);
+			return PTR_ERR(trans);
+		}
+		ret = btrfs_commit_transaction(trans);
+		WARN_ON(ret);
+
+		/* Prevent write_all_supers() during the finishing procedure */
+		mutex_lock(&fs_info->fs_devices->device_list_mutex);
+		/* Prevent new chunks being allocated on the source device */
+		mutex_lock(&fs_info->chunk_mutex);
+
+		if (!list_empty(&src_device->post_commit_list)) {
+			mutex_unlock(&fs_info->fs_devices->device_list_mutex);
+			mutex_unlock(&fs_info->chunk_mutex);
+		} else {
+			break;
+		}
 	}
-	ret = btrfs_commit_transaction(trans);
-	WARN_ON(ret);
 
-	/* keep away write_all_supers() during the finishing procedure */
-	mutex_lock(&fs_info->fs_devices->device_list_mutex);
-	mutex_lock(&fs_info->chunk_mutex);
 	down_write(&dev_replace->rwsem);
 	dev_replace->replace_state =
 		scrub_ret ? BTRFS_IOCTL_DEV_REPLACE_STATE_CANCELED
@@ -662,7 +678,6 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
 	btrfs_device_set_disk_total_bytes(tgt_device,
 					  src_device->disk_total_bytes);
 	btrfs_device_set_bytes_used(tgt_device, src_device->bytes_used);
-	ASSERT(list_empty(&src_device->resized_list));
 	tgt_device->commit_total_bytes = src_device->commit_total_bytes;
 	tgt_device->commit_bytes_used = src_device->bytes_used;
 
@@ -696,7 +711,7 @@ static int btrfs_dev_replace_finishing(struct btrfs_fs_info *fs_info,
 
 	/* replace the sysfs entry */
 	btrfs_sysfs_rm_device_link(fs_info->fs_devices, src_device);
-	btrfs_rm_dev_replace_free_srcdev(fs_info, src_device);
+	btrfs_rm_dev_replace_free_srcdev(src_device);
 
 	/* write back the superblocks */
 	trans = btrfs_start_transaction(root, 0);
@@ -862,6 +877,7 @@ int btrfs_dev_replace_cancel(struct btrfs_fs_info *fs_info)
 			btrfs_destroy_dev_replace_tgtdev(tgt_device);
 		break;
 	default:
+		up_write(&dev_replace->rwsem);
 		result = -EINVAL;
 	}
 
diff --git a/fs/btrfs/dev-replace.h b/fs/btrfs/dev-replace.h
index 4aa40bacc6cc..78c5d8f1adda 100644
--- a/fs/btrfs/dev-replace.h
+++ b/fs/btrfs/dev-replace.h
@@ -9,8 +9,7 @@
 struct btrfs_ioctl_dev_replace_args;
 
 int btrfs_init_dev_replace(struct btrfs_fs_info *fs_info);
-int btrfs_run_dev_replace(struct btrfs_trans_handle *trans,
-			  struct btrfs_fs_info *fs_info);
+int btrfs_run_dev_replace(struct btrfs_trans_handle *trans);
 int btrfs_dev_replace_by_ioctl(struct btrfs_fs_info *fs_info,
 			    struct btrfs_ioctl_dev_replace_args *args);
 void btrfs_dev_replace_status(struct btrfs_fs_info *fs_info,
diff --git a/fs/btrfs/dir-item.c b/fs/btrfs/dir-item.c
index 8de74d835dba..863367c2c620 100644
--- a/fs/btrfs/dir-item.c
+++ b/fs/btrfs/dir-item.c
@@ -36,7 +36,7 @@ static struct btrfs_dir_item *insert_with_overflow(struct btrfs_trans_handle
 		di = btrfs_match_dir_item_name(fs_info, path, name, name_len);
 		if (di)
 			return ERR_PTR(-EEXIST);
-		btrfs_extend_item(fs_info, path, data_size);
+		btrfs_extend_item(path, data_size);
 	} else if (ret < 0)
 		return ERR_PTR(ret);
 	WARN_ON(ret > 0);
@@ -429,8 +429,7 @@ int btrfs_delete_one_dir_name(struct btrfs_trans_handle *trans,
 		start = btrfs_item_ptr_offset(leaf, path->slots[0]);
 		memmove_extent_buffer(leaf, ptr, ptr + sub_item_len,
 			item_len - (ptr + sub_item_len - start));
-		btrfs_truncate_item(root->fs_info, path,
-				    item_len - sub_item_len, 1);
+		btrfs_truncate_item(path, item_len - sub_item_len, 1);
 	}
 	return ret;
 }
diff --git a/fs/btrfs/disk-io.c b/fs/btrfs/disk-io.c
index 6a2a2a951705..deb74a8c191a 100644
--- a/fs/btrfs/disk-io.c
+++ b/fs/btrfs/disk-io.c
@@ -17,6 +17,7 @@
 #include <linux/semaphore.h>
 #include <linux/error-injection.h>
 #include <linux/crc32c.h>
+#include <linux/sched/mm.h>
 #include <asm/unaligned.h>
 #include "ctree.h"
 #include "disk-io.h"
@@ -259,15 +260,12 @@ void btrfs_csum_final(u32 crc, u8 *result)
 }
 
 /*
- * compute the csum for a btree block, and either verify it or write it
- * into the csum field of the block.
+ * Compute the csum of a btree block and store the result to provided buffer.
+ *
+ * Returns error if the extent buffer cannot be mapped.
  */
-static int csum_tree_block(struct btrfs_fs_info *fs_info,
-			   struct extent_buffer *buf,
-			   int verify)
+static int csum_tree_block(struct extent_buffer *buf, u8 *result)
 {
-	u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
-	char result[BTRFS_CSUM_SIZE];
 	unsigned long len;
 	unsigned long cur_len;
 	unsigned long offset = BTRFS_CSUM_SIZE;
@@ -287,7 +285,7 @@ static int csum_tree_block(struct btrfs_fs_info *fs_info,
 		 */
 		err = map_private_extent_buffer(buf, offset, 32,
 					&kaddr, &map_start, &map_len);
-		if (err)
+		if (WARN_ON(err))
 			return err;
 		cur_len = min(len, map_len - (offset - map_start));
 		crc = btrfs_csum_data(kaddr + offset - map_start,
@@ -299,23 +297,6 @@ static int csum_tree_block(struct btrfs_fs_info *fs_info,
 
 	btrfs_csum_final(crc, result);
 
-	if (verify) {
-		if (memcmp_extent_buffer(buf, result, 0, csum_size)) {
-			u32 val;
-			u32 found = 0;
-			memcpy(&found, result, csum_size);
-
-			read_extent_buffer(buf, &val, 0, csum_size);
-			btrfs_warn_rl(fs_info,
-				"%s checksum verify failed on %llu wanted %X found %X level %d",
-				fs_info->sb->s_id, buf->start,
-				val, found, btrfs_header_level(buf));
-			return -EUCLEAN;
-		}
-	} else {
-		write_extent_buffer(buf, result, 0, csum_size);
-	}
-
 	return 0;
 }
 
@@ -341,7 +322,7 @@ static int verify_parent_transid(struct extent_io_tree *io_tree,
 
 	if (need_lock) {
 		btrfs_tree_read_lock(eb);
-		btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+		btrfs_set_lock_blocking_read(eb);
 	}
 
 	lock_extent_bits(io_tree, eb->start, eb->start + eb->len - 1,
@@ -413,22 +394,21 @@ static int btrfs_check_super_csum(struct btrfs_fs_info *fs_info,
 	return ret;
 }
 
-static int verify_level_key(struct btrfs_fs_info *fs_info,
-			    struct extent_buffer *eb, int level,
-			    struct btrfs_key *first_key, u64 parent_transid)
+int btrfs_verify_level_key(struct extent_buffer *eb, int level,
+			   struct btrfs_key *first_key, u64 parent_transid)
 {
+	struct btrfs_fs_info *fs_info = eb->fs_info;
 	int found_level;
 	struct btrfs_key found_key;
 	int ret;
 
 	found_level = btrfs_header_level(eb);
 	if (found_level != level) {
-#ifdef CONFIG_BTRFS_DEBUG
-		WARN_ON(1);
+		WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG),
+		     KERN_ERR "BTRFS: tree level check failed\n");
 		btrfs_err(fs_info,
 "tree level mismatch detected, bytenr=%llu level expected=%u has=%u",
 			  eb->start, level, found_level);
-#endif
 		return -EIO;
 	}
 
@@ -449,9 +429,9 @@ static int verify_level_key(struct btrfs_fs_info *fs_info,
 		btrfs_item_key_to_cpu(eb, &found_key, 0);
 	ret = btrfs_comp_cpu_keys(first_key, &found_key);
 
-#ifdef CONFIG_BTRFS_DEBUG
 	if (ret) {
-		WARN_ON(1);
+		WARN(IS_ENABLED(CONFIG_BTRFS_DEBUG),
+		     KERN_ERR "BTRFS: tree first key check failed\n");
 		btrfs_err(fs_info,
 "tree first key mismatch detected, bytenr=%llu parent_transid=%llu key expected=(%llu,%u,%llu) has=(%llu,%u,%llu)",
 			  eb->start, parent_transid, first_key->objectid,
@@ -459,7 +439,6 @@ static int verify_level_key(struct btrfs_fs_info *fs_info,
 			  found_key.objectid, found_key.type,
 			  found_key.offset);
 	}
-#endif
 	return ret;
 }
 
@@ -471,11 +450,11 @@ static int verify_level_key(struct btrfs_fs_info *fs_info,
  * @level:		expected level, mandatory check
  * @first_key:		expected key of first slot, skip check if NULL
  */
-static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info,
-					  struct extent_buffer *eb,
+static int btree_read_extent_buffer_pages(struct extent_buffer *eb,
 					  u64 parent_transid, int level,
 					  struct btrfs_key *first_key)
 {
+	struct btrfs_fs_info *fs_info = eb->fs_info;
 	struct extent_io_tree *io_tree;
 	int failed = 0;
 	int ret;
@@ -486,14 +465,13 @@ static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info,
 	io_tree = &BTRFS_I(fs_info->btree_inode)->io_tree;
 	while (1) {
 		clear_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
-		ret = read_extent_buffer_pages(io_tree, eb, WAIT_COMPLETE,
-					       mirror_num);
+		ret = read_extent_buffer_pages(eb, WAIT_COMPLETE, mirror_num);
 		if (!ret) {
 			if (verify_parent_transid(io_tree, eb,
 						   parent_transid, 0))
 				ret = -EIO;
-			else if (verify_level_key(fs_info, eb, level,
-						  first_key, parent_transid))
+			else if (btrfs_verify_level_key(eb, level,
+						first_key, parent_transid))
 				ret = -EUCLEAN;
 			else
 				break;
@@ -518,7 +496,7 @@ static int btree_read_extent_buffer_pages(struct btrfs_fs_info *fs_info,
 	}
 
 	if (failed && !ret && failed_mirror)
-		repair_eb_io_failure(fs_info, eb, failed_mirror);
+		btrfs_repair_eb_io_failure(eb, failed_mirror);
 
 	return ret;
 }
@@ -532,7 +510,10 @@ static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page)
 {
 	u64 start = page_offset(page);
 	u64 found_start;
+	u8 result[BTRFS_CSUM_SIZE];
+	u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
 	struct extent_buffer *eb;
+	int ret;
 
 	eb = (struct extent_buffer *)page->private;
 	if (page != eb->pages[0])
@@ -551,12 +532,28 @@ static int csum_dirty_buffer(struct btrfs_fs_info *fs_info, struct page *page)
 	ASSERT(memcmp_extent_buffer(eb, fs_info->fs_devices->metadata_uuid,
 			btrfs_header_fsid(), BTRFS_FSID_SIZE) == 0);
 
-	return csum_tree_block(fs_info, eb, 0);
+	if (csum_tree_block(eb, result))
+		return -EINVAL;
+
+	if (btrfs_header_level(eb))
+		ret = btrfs_check_node(eb);
+	else
+		ret = btrfs_check_leaf_full(eb);
+
+	if (ret < 0) {
+		btrfs_err(fs_info,
+		"block=%llu write time tree block corruption detected",
+			  eb->start);
+		return ret;
+	}
+	write_extent_buffer(eb, result, 0, csum_size);
+
+	return 0;
 }
 
-static int check_tree_block_fsid(struct btrfs_fs_info *fs_info,
-				 struct extent_buffer *eb)
+static int check_tree_block_fsid(struct extent_buffer *eb)
 {
+	struct btrfs_fs_info *fs_info = eb->fs_info;
 	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
 	u8 fsid[BTRFS_FSID_SIZE];
 	int ret = 1;
@@ -594,7 +591,9 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
 	struct extent_buffer *eb;
 	struct btrfs_root *root = BTRFS_I(page->mapping->host)->root;
 	struct btrfs_fs_info *fs_info = root->fs_info;
+	u16 csum_size = btrfs_super_csum_size(fs_info->super_copy);
 	int ret = 0;
+	u8 result[BTRFS_CSUM_SIZE];
 	int reads_done;
 
 	if (!page->private)
@@ -624,7 +623,7 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
 		ret = -EIO;
 		goto err;
 	}
-	if (check_tree_block_fsid(fs_info, eb)) {
+	if (check_tree_block_fsid(eb)) {
 		btrfs_err_rl(fs_info, "bad fsid on block %llu",
 			     eb->start);
 		ret = -EIO;
@@ -641,25 +640,44 @@ static int btree_readpage_end_io_hook(struct btrfs_io_bio *io_bio,
 	btrfs_set_buffer_lockdep_class(btrfs_header_owner(eb),
 				       eb, found_level);
 
-	ret = csum_tree_block(fs_info, eb, 1);
+	ret = csum_tree_block(eb, result);
 	if (ret)
 		goto err;
 
+	if (memcmp_extent_buffer(eb, result, 0, csum_size)) {
+		u32 val;
+		u32 found = 0;
+
+		memcpy(&found, result, csum_size);
+
+		read_extent_buffer(eb, &val, 0, csum_size);
+		btrfs_warn_rl(fs_info,
+		"%s checksum verify failed on %llu wanted %x found %x level %d",
+			      fs_info->sb->s_id, eb->start,
+			      val, found, btrfs_header_level(eb));
+		ret = -EUCLEAN;
+		goto err;
+	}
+
 	/*
 	 * If this is a leaf block and it is corrupt, set the corrupt bit so
 	 * that we don't try and read the other copies of this block, just
 	 * return -EIO.
 	 */
-	if (found_level == 0 && btrfs_check_leaf_full(fs_info, eb)) {
+	if (found_level == 0 && btrfs_check_leaf_full(eb)) {
 		set_bit(EXTENT_BUFFER_CORRUPT, &eb->bflags);
 		ret = -EIO;
 	}
 
-	if (found_level > 0 && btrfs_check_node(fs_info, eb))
+	if (found_level > 0 && btrfs_check_node(eb))
 		ret = -EIO;
 
 	if (!ret)
 		set_extent_buffer_uptodate(eb);
+	else
+		btrfs_err(fs_info,
+			  "block=%llu read time tree block corruption detected",
+			  eb->start);
 err:
 	if (reads_done &&
 	    test_and_clear_bit(EXTENT_BUFFER_READAHEAD, &eb->bflags))
@@ -831,10 +849,11 @@ static blk_status_t btree_csum_one_bio(struct bio *bio)
 {
 	struct bio_vec *bvec;
 	struct btrfs_root *root;
-	int i, ret = 0;
+	int ret = 0;
+	struct bvec_iter_all iter_all;
 
 	ASSERT(!bio_flagged(bio, BIO_CLONED));
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 		root = BTRFS_I(bvec->bv_page->mapping->host)->root;
 		ret = csum_dirty_buffer(root->fs_info, bvec->bv_page);
 		if (ret)
@@ -865,11 +884,10 @@ static int check_async_write(struct btrfs_inode *bi)
 	return 1;
 }
 
-static blk_status_t btree_submit_bio_hook(void *private_data, struct bio *bio,
-					  int mirror_num, unsigned long bio_flags,
-					  u64 bio_offset)
+static blk_status_t btree_submit_bio_hook(struct inode *inode, struct bio *bio,
+					  int mirror_num,
+					  unsigned long bio_flags)
 {
-	struct inode *inode = private_data;
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	int async = check_async_write(BTRFS_I(inode));
 	blk_status_t ret;
@@ -895,8 +913,7 @@ static blk_status_t btree_submit_bio_hook(void *private_data, struct bio *bio,
 		 * checksumming can happen in parallel across all CPUs
 		 */
 		ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, 0,
-					  bio_offset, private_data,
-					  btree_submit_bio_start);
+					  0, inode, btree_submit_bio_start);
 	}
 
 	if (ret)
@@ -1015,22 +1032,23 @@ static const struct address_space_operations btree_aops = {
 void readahead_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr)
 {
 	struct extent_buffer *buf = NULL;
-	struct inode *btree_inode = fs_info->btree_inode;
+	int ret;
 
 	buf = btrfs_find_create_tree_block(fs_info, bytenr);
 	if (IS_ERR(buf))
 		return;
-	read_extent_buffer_pages(&BTRFS_I(btree_inode)->io_tree,
-				 buf, WAIT_NONE, 0);
-	free_extent_buffer(buf);
+
+	ret = read_extent_buffer_pages(buf, WAIT_NONE, 0);
+	if (ret < 0)
+		free_extent_buffer_stale(buf);
+	else
+		free_extent_buffer(buf);
 }
 
 int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
 			 int mirror_num, struct extent_buffer **eb)
 {
 	struct extent_buffer *buf = NULL;
-	struct inode *btree_inode = fs_info->btree_inode;
-	struct extent_io_tree *io_tree = &BTRFS_I(btree_inode)->io_tree;
 	int ret;
 
 	buf = btrfs_find_create_tree_block(fs_info, bytenr);
@@ -1039,15 +1057,14 @@ int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
 
 	set_bit(EXTENT_BUFFER_READAHEAD, &buf->bflags);
 
-	ret = read_extent_buffer_pages(io_tree, buf, WAIT_PAGE_LOCK,
-				       mirror_num);
+	ret = read_extent_buffer_pages(buf, WAIT_PAGE_LOCK, mirror_num);
 	if (ret) {
-		free_extent_buffer(buf);
+		free_extent_buffer_stale(buf);
 		return ret;
 	}
 
 	if (test_bit(EXTENT_BUFFER_CORRUPT, &buf->bflags)) {
-		free_extent_buffer(buf);
+		free_extent_buffer_stale(buf);
 		return -EIO;
 	} else if (extent_buffer_uptodate(buf)) {
 		*eb = buf;
@@ -1066,19 +1083,6 @@ struct extent_buffer *btrfs_find_create_tree_block(
 	return alloc_extent_buffer(fs_info, bytenr);
 }
 
-
-int btrfs_write_tree_block(struct extent_buffer *buf)
-{
-	return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start,
-					buf->start + buf->len - 1);
-}
-
-void btrfs_wait_tree_block_writeback(struct extent_buffer *buf)
-{
-	filemap_fdatawait_range(buf->pages[0]->mapping,
-			        buf->start, buf->start + buf->len - 1);
-}
-
 /*
  * Read tree block at logical address @bytenr and do variant basic but critical
  * verification.
@@ -1098,19 +1102,19 @@ struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
 	if (IS_ERR(buf))
 		return buf;
 
-	ret = btree_read_extent_buffer_pages(fs_info, buf, parent_transid,
+	ret = btree_read_extent_buffer_pages(buf, parent_transid,
 					     level, first_key);
 	if (ret) {
-		free_extent_buffer(buf);
+		free_extent_buffer_stale(buf);
 		return ERR_PTR(ret);
 	}
 	return buf;
 
 }
 
-void clean_tree_block(struct btrfs_fs_info *fs_info,
-		      struct extent_buffer *buf)
+void btrfs_clean_tree_block(struct extent_buffer *buf)
 {
+	struct btrfs_fs_info *fs_info = buf->fs_info;
 	if (btrfs_header_generation(buf) ==
 	    fs_info->running_transaction->transid) {
 		btrfs_assert_tree_locked(buf);
@@ -1120,7 +1124,7 @@ void clean_tree_block(struct btrfs_fs_info *fs_info,
 						 -buf->len,
 						 fs_info->dirty_metadata_batch);
 			/* ugh, clear_extent_buffer_dirty needs to lock the page */
-			btrfs_set_lock_blocking(buf);
+			btrfs_set_lock_blocking_write(buf);
 			clear_extent_buffer_dirty(buf);
 		}
 	}
@@ -1175,6 +1179,7 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
 	INIT_LIST_HEAD(&root->delalloc_root);
 	INIT_LIST_HEAD(&root->ordered_extents);
 	INIT_LIST_HEAD(&root->ordered_root);
+	INIT_LIST_HEAD(&root->reloc_dirty_list);
 	INIT_LIST_HEAD(&root->logged_list[0]);
 	INIT_LIST_HEAD(&root->logged_list[1]);
 	spin_lock_init(&root->inode_lock);
@@ -1205,7 +1210,8 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
 	root->log_transid_committed = -1;
 	root->last_log_commit = 0;
 	if (!dummy)
-		extent_io_tree_init(&root->dirty_log_pages, NULL);
+		extent_io_tree_init(fs_info, &root->dirty_log_pages,
+				    IO_TREE_ROOT_DIRTY_LOG_PAGES, NULL);
 
 	memset(&root->root_key, 0, sizeof(root->root_key));
 	memset(&root->root_item, 0, sizeof(root->root_item));
@@ -1218,6 +1224,7 @@ static void __setup_root(struct btrfs_root *root, struct btrfs_fs_info *fs_info,
 	root->anon_dev = 0;
 
 	spin_lock_init(&root->root_item_lock);
+	btrfs_qgroup_init_swapped_blocks(&root->swapped_blocks);
 }
 
 static struct btrfs_root *btrfs_alloc_root(struct btrfs_fs_info *fs_info,
@@ -1251,17 +1258,24 @@ struct btrfs_root *btrfs_alloc_dummy_root(struct btrfs_fs_info *fs_info)
 #endif
 
 struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
-				     struct btrfs_fs_info *fs_info,
 				     u64 objectid)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct extent_buffer *leaf;
 	struct btrfs_root *tree_root = fs_info->tree_root;
 	struct btrfs_root *root;
 	struct btrfs_key key;
+	unsigned int nofs_flag;
 	int ret = 0;
 	uuid_le uuid = NULL_UUID_LE;
 
+	/*
+	 * We're holding a transaction handle, so use a NOFS memory allocation
+	 * context to avoid deadlock if reclaim happens.
+	 */
+	nofs_flag = memalloc_nofs_save();
 	root = btrfs_alloc_root(fs_info, GFP_KERNEL);
+	memalloc_nofs_restore(nofs_flag);
 	if (!root)
 		return ERR_PTR(-ENOMEM);
 
@@ -1707,9 +1721,7 @@ static int cleaner_kthread(void *arg)
 			goto sleep;
 		}
 
-		mutex_lock(&fs_info->cleaner_delayed_iput_mutex);
 		btrfs_run_delayed_iputs(fs_info);
-		mutex_unlock(&fs_info->cleaner_delayed_iput_mutex);
 
 		again = btrfs_clean_one_deleted_snapshot(root);
 		mutex_unlock(&fs_info->cleaner_mutex);
@@ -2101,7 +2113,7 @@ static void btrfs_init_scrub(struct btrfs_fs_info *fs_info)
 	atomic_set(&fs_info->scrubs_paused, 0);
 	atomic_set(&fs_info->scrub_cancel_req, 0);
 	init_waitqueue_head(&fs_info->scrub_pause_wait);
-	fs_info->scrub_workers_refcnt = 0;
+	refcount_set(&fs_info->scrub_workers_refcnt, 0);
 }
 
 static void btrfs_init_balance(struct btrfs_fs_info *fs_info)
@@ -2129,8 +2141,9 @@ static void btrfs_init_btree_inode(struct btrfs_fs_info *fs_info)
 	inode->i_mapping->a_ops = &btree_aops;
 
 	RB_CLEAR_NODE(&BTRFS_I(inode)->rb_node);
-	extent_io_tree_init(&BTRFS_I(inode)->io_tree, inode);
-	BTRFS_I(inode)->io_tree.track_uptodate = 0;
+	extent_io_tree_init(fs_info, &BTRFS_I(inode)->io_tree,
+			    IO_TREE_INODE_IO, inode);
+	BTRFS_I(inode)->io_tree.track_uptodate = false;
 	extent_map_tree_init(&BTRFS_I(inode)->extent_tree);
 
 	BTRFS_I(inode)->io_tree.ops = &btree_extent_io_ops;
@@ -2153,7 +2166,6 @@ static void btrfs_init_qgroup(struct btrfs_fs_info *fs_info)
 	spin_lock_init(&fs_info->qgroup_lock);
 	mutex_init(&fs_info->qgroup_ioctl_lock);
 	fs_info->qgroup_tree = RB_ROOT;
-	fs_info->qgroup_op_tree = RB_ROOT;
 	INIT_LIST_HEAD(&fs_info->dirty_qgroups);
 	fs_info->qgroup_seq = 1;
 	fs_info->qgroup_ulist = NULL;
@@ -2621,11 +2633,17 @@ int open_ctree(struct super_block *sb,
 		goto fail;
 	}
 
-	ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL);
+	ret = percpu_counter_init(&fs_info->dio_bytes, 0, GFP_KERNEL);
 	if (ret) {
 		err = ret;
 		goto fail_srcu;
 	}
+
+	ret = percpu_counter_init(&fs_info->dirty_metadata_bytes, 0, GFP_KERNEL);
+	if (ret) {
+		err = ret;
+		goto fail_dio_bytes;
+	}
 	fs_info->dirty_metadata_batch = PAGE_SIZE *
 					(1 + ilog2(nr_cpu_ids));
 
@@ -2658,7 +2676,6 @@ int open_ctree(struct super_block *sb,
 	spin_lock_init(&fs_info->defrag_inodes_lock);
 	spin_lock_init(&fs_info->tree_mod_seq_lock);
 	spin_lock_init(&fs_info->super_lock);
-	spin_lock_init(&fs_info->qgroup_op_lock);
 	spin_lock_init(&fs_info->buffer_lock);
 	spin_lock_init(&fs_info->unused_bgs_lock);
 	rwlock_init(&fs_info->tree_mod_log_lock);
@@ -2666,7 +2683,6 @@ int open_ctree(struct super_block *sb,
 	mutex_init(&fs_info->delete_unused_bgs_mutex);
 	mutex_init(&fs_info->reloc_mutex);
 	mutex_init(&fs_info->delalloc_root_mutex);
-	mutex_init(&fs_info->cleaner_delayed_iput_mutex);
 	seqlock_init(&fs_info->profiles_lock);
 
 	INIT_LIST_HEAD(&fs_info->dirty_cowonly_roots);
@@ -2686,8 +2702,8 @@ int open_ctree(struct super_block *sb,
 
 	atomic_set(&fs_info->async_delalloc_pages, 0);
 	atomic_set(&fs_info->defrag_running, 0);
-	atomic_set(&fs_info->qgroup_op_seq, 0);
 	atomic_set(&fs_info->reada_works_cnt, 0);
+	atomic_set(&fs_info->nr_delayed_iputs, 0);
 	atomic64_set(&fs_info->tree_mod_seq, 0);
 	fs_info->sb = sb;
 	fs_info->max_inline = BTRFS_DEFAULT_MAX_INLINE;
@@ -2739,8 +2755,10 @@ int open_ctree(struct super_block *sb,
 	fs_info->block_group_cache_tree = RB_ROOT;
 	fs_info->first_logical_byte = (u64)-1;
 
-	extent_io_tree_init(&fs_info->freed_extents[0], NULL);
-	extent_io_tree_init(&fs_info->freed_extents[1], NULL);
+	extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
+			    IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
+	extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
+			    IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
 	fs_info->pinned_extents = &fs_info->freed_extents[0];
 	set_bit(BTRFS_FS_BARRIER, &fs_info->flags);
 
@@ -2765,8 +2783,7 @@ int open_ctree(struct super_block *sb,
 	init_waitqueue_head(&fs_info->transaction_wait);
 	init_waitqueue_head(&fs_info->transaction_blocked_wait);
 	init_waitqueue_head(&fs_info->async_submit_wait);
-
-	INIT_LIST_HEAD(&fs_info->pinned_chunks);
+	init_waitqueue_head(&fs_info->delayed_iputs_wait);
 
 	/* Usable values until the real ones are cached from the superblock */
 	fs_info->nodesize = 4096;
@@ -2948,7 +2965,7 @@ int open_ctree(struct super_block *sb,
 	sb->s_bdi->congested_fn = btrfs_congested_fn;
 	sb->s_bdi->congested_data = fs_info;
 	sb->s_bdi->capabilities |= BDI_CAP_CGROUP_WRITEBACK;
-	sb->s_bdi->ra_pages = VM_MAX_READAHEAD * SZ_1K / PAGE_SIZE;
+	sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
 	sb->s_bdi->ra_pages *= btrfs_super_num_devices(disk_super);
 	sb->s_bdi->ra_pages = max(sb->s_bdi->ra_pages, SZ_4M / PAGE_SIZE);
 
@@ -3325,6 +3342,8 @@ fail_delalloc_bytes:
 	percpu_counter_destroy(&fs_info->delalloc_bytes);
 fail_dirty_metadata_bytes:
 	percpu_counter_destroy(&fs_info->dirty_metadata_bytes);
+fail_dio_bytes:
+	percpu_counter_destroy(&fs_info->dio_bytes);
 fail_srcu:
 	cleanup_srcu_struct(&fs_info->subvol_srcu);
 fail:
@@ -4006,6 +4025,10 @@ void close_ctree(struct btrfs_fs_info *fs_info)
 		       percpu_counter_sum(&fs_info->delalloc_bytes));
 	}
 
+	if (percpu_counter_sum(&fs_info->dio_bytes))
+		btrfs_info(fs_info, "at unmount dio bytes count %lld",
+			   percpu_counter_sum(&fs_info->dio_bytes));
+
 	btrfs_sysfs_remove_mounted(fs_info);
 	btrfs_sysfs_remove_fsid(fs_info->fs_devices);
 
@@ -4032,25 +4055,17 @@ void close_ctree(struct btrfs_fs_info *fs_info)
 		btrfsic_unmount(fs_info->fs_devices);
 #endif
 
-	btrfs_close_devices(fs_info->fs_devices);
 	btrfs_mapping_tree_free(&fs_info->mapping_tree);
+	btrfs_close_devices(fs_info->fs_devices);
 
 	percpu_counter_destroy(&fs_info->dirty_metadata_bytes);
 	percpu_counter_destroy(&fs_info->delalloc_bytes);
+	percpu_counter_destroy(&fs_info->dio_bytes);
 	percpu_counter_destroy(&fs_info->dev_replace.bio_counter);
 	cleanup_srcu_struct(&fs_info->subvol_srcu);
 
 	btrfs_free_stripe_hash_table(fs_info);
 	btrfs_free_ref_cache(fs_info);
-
-	while (!list_empty(&fs_info->pinned_chunks)) {
-		struct extent_map *em;
-
-		em = list_first_entry(&fs_info->pinned_chunks,
-				      struct extent_map, list);
-		list_del_init(&em->list);
-		free_extent_map(em);
-	}
 }
 
 int btrfs_buffer_uptodate(struct extent_buffer *buf, u64 parent_transid,
@@ -4104,7 +4119,7 @@ void btrfs_mark_buffer_dirty(struct extent_buffer *buf)
 	 * So here we should only check item pointers, not item data.
 	 */
 	if (btrfs_header_level(buf) == 0 &&
-	    btrfs_check_leaf_relaxed(fs_info, buf)) {
+	    btrfs_check_leaf_relaxed(buf)) {
 		btrfs_print_leaf(buf);
 		ASSERT(0);
 	}
@@ -4147,10 +4162,7 @@ void btrfs_btree_balance_dirty_nodelay(struct btrfs_fs_info *fs_info)
 int btrfs_read_buffer(struct extent_buffer *buf, u64 parent_transid, int level,
 		      struct btrfs_key *first_key)
 {
-	struct btrfs_root *root = BTRFS_I(buf->pages[0]->mapping->host)->root;
-	struct btrfs_fs_info *fs_info = root->fs_info;
-
-	return btree_read_extent_buffer_pages(fs_info, buf, parent_transid,
+	return btree_read_extent_buffer_pages(buf, parent_transid,
 					      level, first_key);
 }
 
@@ -4238,16 +4250,9 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
 
 		head = rb_entry(node, struct btrfs_delayed_ref_head,
 				href_node);
-		if (!mutex_trylock(&head->mutex)) {
-			refcount_inc(&head->refs);
-			spin_unlock(&delayed_refs->lock);
-
-			mutex_lock(&head->mutex);
-			mutex_unlock(&head->mutex);
-			btrfs_put_delayed_ref_head(head);
-			spin_lock(&delayed_refs->lock);
+		if (btrfs_delayed_ref_lock(delayed_refs, head))
 			continue;
-		}
+
 		spin_lock(&head->lock);
 		while ((n = rb_first_cached(&head->ref_tree)) != NULL) {
 			ref = rb_entry(n, struct btrfs_delayed_ref_node,
@@ -4263,12 +4268,7 @@ static int btrfs_destroy_delayed_refs(struct btrfs_transaction *trans,
 		if (head->must_insert_reserved)
 			pin_bytes = true;
 		btrfs_free_delayed_extent_op(head->extent_op);
-		delayed_refs->num_heads--;
-		if (head->processing == 0)
-			delayed_refs->num_heads_ready--;
-		atomic_dec(&delayed_refs->num_entries);
-		rb_erase_cached(&head->href_node, &delayed_refs->href_root);
-		RB_CLEAR_NODE(&head->href_node);
+		btrfs_delete_ref_head(delayed_refs, head);
 		spin_unlock(&head->lock);
 		spin_unlock(&delayed_refs->lock);
 		mutex_unlock(&head->mutex);
@@ -4486,10 +4486,17 @@ void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *cur_trans,
 void btrfs_cleanup_one_transaction(struct btrfs_transaction *cur_trans,
 				   struct btrfs_fs_info *fs_info)
 {
+	struct btrfs_device *dev, *tmp;
+
 	btrfs_cleanup_dirty_bgs(cur_trans, fs_info);
 	ASSERT(list_empty(&cur_trans->dirty_bgs));
 	ASSERT(list_empty(&cur_trans->io_bgs));
 
+	list_for_each_entry_safe(dev, tmp, &cur_trans->dev_update_list,
+				 post_commit_list) {
+		list_del_init(&dev->post_commit_list);
+	}
+
 	btrfs_destroy_delayed_refs(cur_trans, fs_info);
 
 	cur_trans->state = TRANS_STATE_COMMIT_START;
diff --git a/fs/btrfs/disk-io.h b/fs/btrfs/disk-io.h
index 987a64bc0c66..a0161aa1ea0b 100644
--- a/fs/btrfs/disk-io.h
+++ b/fs/btrfs/disk-io.h
@@ -39,6 +39,8 @@ static inline u64 btrfs_sb_offset(int mirror)
 struct btrfs_device;
 struct btrfs_fs_devices;
 
+int btrfs_verify_level_key(struct extent_buffer *eb, int level,
+			   struct btrfs_key *first_key, u64 parent_transid);
 struct extent_buffer *read_tree_block(struct btrfs_fs_info *fs_info, u64 bytenr,
 				      u64 parent_transid, int level,
 				      struct btrfs_key *first_key);
@@ -48,7 +50,7 @@ int reada_tree_block_flagged(struct btrfs_fs_info *fs_info, u64 bytenr,
 struct extent_buffer *btrfs_find_create_tree_block(
 						struct btrfs_fs_info *fs_info,
 						u64 bytenr);
-void clean_tree_block(struct btrfs_fs_info *fs_info, struct extent_buffer *buf);
+void btrfs_clean_tree_block(struct extent_buffer *buf);
 int open_ctree(struct super_block *sb,
 	       struct btrfs_fs_devices *fs_devices,
 	       char *options);
@@ -123,8 +125,6 @@ blk_status_t btrfs_wq_submit_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
 			extent_submit_bio_start_t *submit_bio_start);
 blk_status_t btrfs_submit_bio_done(void *private_data, struct bio *bio,
 			  int mirror_num);
-int btrfs_write_tree_block(struct extent_buffer *buf);
-void btrfs_wait_tree_block_writeback(struct extent_buffer *buf);
 int btrfs_init_log_root_tree(struct btrfs_trans_handle *trans,
 			     struct btrfs_fs_info *fs_info);
 int btrfs_add_log_tree(struct btrfs_trans_handle *trans,
@@ -134,7 +134,6 @@ void btrfs_cleanup_dirty_bgs(struct btrfs_transaction *trans,
 void btrfs_cleanup_one_transaction(struct btrfs_transaction *trans,
 				  struct btrfs_fs_info *fs_info);
 struct btrfs_root *btrfs_create_tree(struct btrfs_trans_handle *trans,
-				     struct btrfs_fs_info *fs_info,
 				     u64 objectid);
 int btree_lock_page_hook(struct page *page, void *data,
 				void (*flush_fn)(void *));
diff --git a/fs/btrfs/extent-tree.c b/fs/btrfs/extent-tree.c
index d81035b7ea7d..5faf057f6f37 100644
--- a/fs/btrfs/extent-tree.c
+++ b/fs/btrfs/extent-tree.c
@@ -643,7 +643,7 @@ static int cache_block_group(struct btrfs_block_group_cache *cache,
 
 	if (btrfs_test_opt(fs_info, SPACE_CACHE)) {
 		mutex_lock(&caching_ctl->mutex);
-		ret = load_free_space_cache(fs_info, cache);
+		ret = load_free_space_cache(cache);
 
 		spin_lock(&cache->lock);
 		if (ret == 1) {
@@ -756,14 +756,17 @@ static struct btrfs_space_info *__find_space_info(struct btrfs_fs_info *info,
 	return NULL;
 }
 
-static void add_pinned_bytes(struct btrfs_fs_info *fs_info, s64 num_bytes,
-			     bool metadata, u64 root_objectid)
+static void add_pinned_bytes(struct btrfs_fs_info *fs_info,
+			     struct btrfs_ref *ref, int sign)
 {
 	struct btrfs_space_info *space_info;
+	s64 num_bytes;
 	u64 flags;
 
-	if (metadata) {
-		if (root_objectid == BTRFS_CHUNK_TREE_OBJECTID)
+	ASSERT(sign == 1 || sign == -1);
+	num_bytes = sign * ref->len;
+	if (ref->type == BTRFS_REF_METADATA) {
+		if (ref->tree_ref.root == BTRFS_CHUNK_TREE_OBJECTID)
 			flags = BTRFS_BLOCK_GROUP_SYSTEM;
 		else
 			flags = BTRFS_BLOCK_GROUP_METADATA;
@@ -1704,7 +1707,7 @@ void setup_inline_extent_backref(struct btrfs_fs_info *fs_info,
 	type = extent_ref_type(parent, owner);
 	size = btrfs_extent_inline_ref_size(type);
 
-	btrfs_extend_item(fs_info, path, size);
+	btrfs_extend_item(path, size);
 
 	ei = btrfs_item_ptr(leaf, path->slots[0], struct btrfs_extent_item);
 	refs = btrfs_extent_refs(leaf, ei);
@@ -1779,7 +1782,6 @@ void update_inline_extent_backref(struct btrfs_path *path,
 				  int *last_ref)
 {
 	struct extent_buffer *leaf = path->nodes[0];
-	struct btrfs_fs_info *fs_info = leaf->fs_info;
 	struct btrfs_extent_item *ei;
 	struct btrfs_extent_data_ref *dref = NULL;
 	struct btrfs_shared_data_ref *sref = NULL;
@@ -1834,7 +1836,7 @@ void update_inline_extent_backref(struct btrfs_path *path,
 			memmove_extent_buffer(leaf, ptr, ptr + size,
 					      end - ptr - size);
 		item_size -= size;
-		btrfs_truncate_item(fs_info, path, item_size, 1);
+		btrfs_truncate_item(path, item_size, 1);
 	}
 	btrfs_mark_buffer_dirty(leaf);
 }
@@ -1905,7 +1907,6 @@ static int remove_extent_backref(struct btrfs_trans_handle *trans,
 	return ret;
 }
 
-#define in_range(b, first, len)        ((b) >= (first) && (b) < (first) + (len))
 static int btrfs_issue_discard(struct block_device *bdev, u64 start, u64 len,
 			       u64 *discarded_bytes)
 {
@@ -2043,39 +2044,28 @@ int btrfs_discard_extent(struct btrfs_fs_info *fs_info, u64 bytenr,
 
 /* Can return -ENOMEM */
 int btrfs_inc_extent_ref(struct btrfs_trans_handle *trans,
-			 struct btrfs_root *root,
-			 u64 bytenr, u64 num_bytes, u64 parent,
-			 u64 root_objectid, u64 owner, u64 offset)
+			 struct btrfs_ref *generic_ref)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	int old_ref_mod, new_ref_mod;
 	int ret;
 
-	BUG_ON(owner < BTRFS_FIRST_FREE_OBJECTID &&
-	       root_objectid == BTRFS_TREE_LOG_OBJECTID);
+	ASSERT(generic_ref->type != BTRFS_REF_NOT_SET &&
+	       generic_ref->action);
+	BUG_ON(generic_ref->type == BTRFS_REF_METADATA &&
+	       generic_ref->tree_ref.root == BTRFS_TREE_LOG_OBJECTID);
 
-	btrfs_ref_tree_mod(root, bytenr, num_bytes, parent, root_objectid,
-			   owner, offset, BTRFS_ADD_DELAYED_REF);
-
-	if (owner < BTRFS_FIRST_FREE_OBJECTID) {
-		ret = btrfs_add_delayed_tree_ref(trans, bytenr,
-						 num_bytes, parent,
-						 root_objectid, (int)owner,
-						 BTRFS_ADD_DELAYED_REF, NULL,
-						 &old_ref_mod, &new_ref_mod);
-	} else {
-		ret = btrfs_add_delayed_data_ref(trans, bytenr,
-						 num_bytes, parent,
-						 root_objectid, owner, offset,
-						 0, BTRFS_ADD_DELAYED_REF,
+	if (generic_ref->type == BTRFS_REF_METADATA)
+		ret = btrfs_add_delayed_tree_ref(trans, generic_ref,
+				NULL, &old_ref_mod, &new_ref_mod);
+	else
+		ret = btrfs_add_delayed_data_ref(trans, generic_ref, 0,
 						 &old_ref_mod, &new_ref_mod);
-	}
 
-	if (ret == 0 && old_ref_mod < 0 && new_ref_mod >= 0) {
-		bool metadata = owner < BTRFS_FIRST_FREE_OBJECTID;
+	btrfs_ref_tree_mod(fs_info, generic_ref);
 
-		add_pinned_bytes(fs_info, -num_bytes, metadata, root_objectid);
-	}
+	if (ret == 0 && old_ref_mod < 0 && new_ref_mod >= 0)
+		add_pinned_bytes(fs_info, generic_ref, -1);
 
 	return ret;
 }
@@ -2492,9 +2482,6 @@ void btrfs_cleanup_ref_head_accounting(struct btrfs_fs_info *fs_info,
 		}
 	}
 
-	/* Also free its reserved qgroup space */
-	btrfs_qgroup_free_delayed_ref(fs_info, head->qgroup_ref_root,
-				      head->qgroup_reserved);
 	btrfs_delayed_refs_rsv_release(fs_info, nr_items);
 }
 
@@ -2880,97 +2867,6 @@ int btrfs_should_throttle_delayed_refs(struct btrfs_trans_handle *trans)
 	return btrfs_check_space_for_delayed_refs(trans->fs_info);
 }
 
-struct async_delayed_refs {
-	struct btrfs_root *root;
-	u64 transid;
-	int count;
-	int error;
-	int sync;
-	struct completion wait;
-	struct btrfs_work work;
-};
-
-static inline struct async_delayed_refs *
-to_async_delayed_refs(struct btrfs_work *work)
-{
-	return container_of(work, struct async_delayed_refs, work);
-}
-
-static void delayed_ref_async_start(struct btrfs_work *work)
-{
-	struct async_delayed_refs *async = to_async_delayed_refs(work);
-	struct btrfs_trans_handle *trans;
-	struct btrfs_fs_info *fs_info = async->root->fs_info;
-	int ret;
-
-	/* if the commit is already started, we don't need to wait here */
-	if (btrfs_transaction_blocked(fs_info))
-		goto done;
-
-	trans = btrfs_join_transaction(async->root);
-	if (IS_ERR(trans)) {
-		async->error = PTR_ERR(trans);
-		goto done;
-	}
-
-	/*
-	 * trans->sync means that when we call end_transaction, we won't
-	 * wait on delayed refs
-	 */
-	trans->sync = true;
-
-	/* Don't bother flushing if we got into a different transaction */
-	if (trans->transid > async->transid)
-		goto end;
-
-	ret = btrfs_run_delayed_refs(trans, async->count);
-	if (ret)
-		async->error = ret;
-end:
-	ret = btrfs_end_transaction(trans);
-	if (ret && !async->error)
-		async->error = ret;
-done:
-	if (async->sync)
-		complete(&async->wait);
-	else
-		kfree(async);
-}
-
-int btrfs_async_run_delayed_refs(struct btrfs_fs_info *fs_info,
-				 unsigned long count, u64 transid, int wait)
-{
-	struct async_delayed_refs *async;
-	int ret;
-
-	async = kmalloc(sizeof(*async), GFP_NOFS);
-	if (!async)
-		return -ENOMEM;
-
-	async->root = fs_info->tree_root;
-	async->count = count;
-	async->error = 0;
-	async->transid = transid;
-	if (wait)
-		async->sync = 1;
-	else
-		async->sync = 0;
-	init_completion(&async->wait);
-
-	btrfs_init_work(&async->work, btrfs_extent_refs_helper,
-			delayed_ref_async_start, NULL, NULL);
-
-	btrfs_queue_work(fs_info->extent_workers, &async->work);
-
-	if (wait) {
-		wait_for_completion(&async->wait);
-		ret = async->error;
-		kfree(async);
-		return ret;
-	}
-	return 0;
-}
-
 /*
  * this starts processing the delayed reference count updates and
  * extent insertions we have queued up so far.  count can be
@@ -3013,8 +2909,7 @@ again:
 	}
 
 	if (run_all) {
-		if (!list_empty(&trans->new_bgs))
-			btrfs_create_pending_block_groups(trans);
+		btrfs_create_pending_block_groups(trans);
 
 		spin_lock(&delayed_refs->lock);
 		node = rb_first_cached(&delayed_refs->href_root);
@@ -3040,7 +2935,6 @@ out:
 }
 
 int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
-				struct btrfs_fs_info *fs_info,
 				u64 bytenr, u64 num_bytes, u64 flags,
 				int level, int is_data)
 {
@@ -3057,8 +2951,7 @@ int btrfs_set_disk_extent_flags(struct btrfs_trans_handle *trans,
 	extent_op->is_data = is_data ? true : false;
 	extent_op->level = level;
 
-	ret = btrfs_add_delayed_extent_op(fs_info, trans, bytenr,
-					  num_bytes, extent_op);
+	ret = btrfs_add_delayed_extent_op(trans, bytenr, num_bytes, extent_op);
 	if (ret)
 		btrfs_free_delayed_extent_op(extent_op);
 	return ret;
@@ -3250,13 +3143,12 @@ static int __btrfs_mod_ref(struct btrfs_trans_handle *trans,
 	u32 nritems;
 	struct btrfs_key key;
 	struct btrfs_file_extent_item *fi;
+	struct btrfs_ref generic_ref = { 0 };
+	bool for_reloc = btrfs_header_flag(buf, BTRFS_HEADER_FLAG_RELOC);
 	int i;
+	int action;
 	int level;
 	int ret = 0;
-	int (*process_func)(struct btrfs_trans_handle *,
-			    struct btrfs_root *,
-			    u64, u64, u64, u64, u64, u64);
-
 
 	if (btrfs_is_testing(fs_info))
 		return 0;
@@ -3268,15 +3160,14 @@ static int __btrfs_mod_ref(struct btrfs_trans_handle *trans,
 	if (!test_bit(BTRFS_ROOT_REF_COWS, &root->state) && level == 0)
 		return 0;
 
-	if (inc)
-		process_func = btrfs_inc_extent_ref;
-	else
-		process_func = btrfs_free_extent;
-
 	if (full_backref)
 		parent = buf->start;
 	else
 		parent = 0;
+	if (inc)
+		action = BTRFS_ADD_DELAYED_REF;
+	else
+		action = BTRFS_DROP_DELAYED_REF;
 
 	for (i = 0; i < nritems; i++) {
 		if (level == 0) {
@@ -3294,16 +3185,30 @@ static int __btrfs_mod_ref(struct btrfs_trans_handle *trans,
 
 			num_bytes = btrfs_file_extent_disk_num_bytes(buf, fi);
 			key.offset -= btrfs_file_extent_offset(buf, fi);
-			ret = process_func(trans, root, bytenr, num_bytes,
-					   parent, ref_root, key.objectid,
-					   key.offset);
+			btrfs_init_generic_ref(&generic_ref, action, bytenr,
+					       num_bytes, parent);
+			generic_ref.real_root = root->root_key.objectid;
+			btrfs_init_data_ref(&generic_ref, ref_root, key.objectid,
+					    key.offset);
+			generic_ref.skip_qgroup = for_reloc;
+			if (inc)
+				ret = btrfs_inc_extent_ref(trans, &generic_ref);
+			else
+				ret = btrfs_free_extent(trans, &generic_ref);
 			if (ret)
 				goto fail;
 		} else {
 			bytenr = btrfs_node_blockptr(buf, i);
 			num_bytes = fs_info->nodesize;
-			ret = process_func(trans, root, bytenr, num_bytes,
-					   parent, ref_root, level - 1, 0);
+			btrfs_init_generic_ref(&generic_ref, action, bytenr,
+					       num_bytes, parent);
+			generic_ref.real_root = root->root_key.objectid;
+			btrfs_init_tree_ref(&generic_ref, level - 1, ref_root);
+			generic_ref.skip_qgroup = for_reloc;
+			if (inc)
+				ret = btrfs_inc_extent_ref(trans, &generic_ref);
+			else
+				ret = btrfs_free_extent(trans, &generic_ref);
 			if (ret)
 				goto fail;
 		}
@@ -3326,10 +3231,10 @@ int btrfs_dec_ref(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 }
 
 static int write_one_cache_group(struct btrfs_trans_handle *trans,
-				 struct btrfs_fs_info *fs_info,
 				 struct btrfs_path *path,
 				 struct btrfs_block_group_cache *cache)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	int ret;
 	struct btrfs_root *extent_root = fs_info->extent_root;
 	unsigned long bi;
@@ -3352,10 +3257,10 @@ fail:
 
 }
 
-static struct btrfs_block_group_cache *
-next_block_group(struct btrfs_fs_info *fs_info,
-		 struct btrfs_block_group_cache *cache)
+static struct btrfs_block_group_cache *next_block_group(
+		struct btrfs_block_group_cache *cache)
 {
+	struct btrfs_fs_info *fs_info = cache->fs_info;
 	struct rb_node *node;
 
 	spin_lock(&fs_info->block_group_cache_lock);
@@ -3408,7 +3313,7 @@ static int cache_save_setup(struct btrfs_block_group_cache *block_group,
 	if (trans->aborted)
 		return 0;
 again:
-	inode = lookup_free_space_inode(fs_info, block_group, path);
+	inode = lookup_free_space_inode(block_group, path);
 	if (IS_ERR(inode) && PTR_ERR(inode) != -ENOENT) {
 		ret = PTR_ERR(inode);
 		btrfs_release_path(path);
@@ -3422,8 +3327,7 @@ again:
 		if (block_group->ro)
 			goto out_free;
 
-		ret = create_free_space_inode(fs_info, trans, block_group,
-					      path);
+		ret = create_free_space_inode(trans, block_group, path);
 		if (ret)
 			goto out_free;
 		goto again;
@@ -3542,9 +3446,9 @@ out:
 	return ret;
 }
 
-int btrfs_setup_space_cache(struct btrfs_trans_handle *trans,
-			    struct btrfs_fs_info *fs_info)
+int btrfs_setup_space_cache(struct btrfs_trans_handle *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_block_group_cache *cache, *tmp;
 	struct btrfs_transaction *cur_trans = trans->transaction;
 	struct btrfs_path *path;
@@ -3656,8 +3560,7 @@ again:
 
 		if (cache->disk_cache_state == BTRFS_DC_SETUP) {
 			cache->io_ctl.inode = NULL;
-			ret = btrfs_write_out_cache(fs_info, trans,
-						    cache, path);
+			ret = btrfs_write_out_cache(trans, cache, path);
 			if (ret == 0 && cache->io_ctl.inode) {
 				num_started++;
 				should_put = 0;
@@ -3677,8 +3580,7 @@ again:
 			}
 		}
 		if (!ret) {
-			ret = write_one_cache_group(trans, fs_info,
-						    path, cache);
+			ret = write_one_cache_group(trans, path, cache);
 			/*
 			 * Our block group might still be attached to the list
 			 * of new block groups in the transaction handle of some
@@ -3748,9 +3650,9 @@ again:
 	return ret;
 }
 
-int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
-				   struct btrfs_fs_info *fs_info)
+int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_block_group_cache *cache;
 	struct btrfs_transaction *cur_trans = trans->transaction;
 	int ret = 0;
@@ -3813,8 +3715,7 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
 
 		if (!ret && cache->disk_cache_state == BTRFS_DC_SETUP) {
 			cache->io_ctl.inode = NULL;
-			ret = btrfs_write_out_cache(fs_info, trans,
-						    cache, path);
+			ret = btrfs_write_out_cache(trans, cache, path);
 			if (ret == 0 && cache->io_ctl.inode) {
 				num_started++;
 				should_put = 0;
@@ -3828,8 +3729,7 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
 			}
 		}
 		if (!ret) {
-			ret = write_one_cache_group(trans, fs_info,
-						    path, cache);
+			ret = write_one_cache_group(trans, path, cache);
 			/*
 			 * One of the free space endio workers might have
 			 * created a new block group while updating a free space
@@ -3846,8 +3746,7 @@ int btrfs_write_dirty_block_groups(struct btrfs_trans_handle *trans,
 			if (ret == -ENOENT) {
 				wait_event(cur_trans->writer_wait,
 				   atomic_read(&cur_trans->num_writers) == 1);
-				ret = write_one_cache_group(trans, fs_info,
-							    path, cache);
+				ret = write_one_cache_group(trans, path, cache);
 			}
 			if (ret)
 				btrfs_abort_transaction(trans, ret);
@@ -3985,8 +3884,7 @@ static int create_space_info(struct btrfs_fs_info *info, u64 flags)
 				    info->space_info_kobj, "%s",
 				    alloc_name(space_info->flags));
 	if (ret) {
-		percpu_counter_destroy(&space_info->total_bytes_pinned);
-		kfree(space_info);
+		kobject_put(&space_info->kobj);
 		return ret;
 	}
 
@@ -4280,10 +4178,14 @@ commit_trans:
 				/*
 				 * The cleaner kthread might still be doing iput
 				 * operations. Wait for it to finish so that
-				 * more space is released.
+				 * more space is released.  We don't need to
+				 * explicitly run the delayed iputs here because
+				 * the commit_transaction would have woken up
+				 * the cleaner.
 				 */
-				mutex_lock(&fs_info->cleaner_delayed_iput_mutex);
-				mutex_unlock(&fs_info->cleaner_delayed_iput_mutex);
+				ret = btrfs_wait_on_delayed_iputs(fs_info);
+				if (ret)
+					return ret;
 				goto again;
 			} else {
 				btrfs_end_transaction(trans);
@@ -4396,7 +4298,6 @@ static inline u64 calc_global_rsv_need_space(struct btrfs_block_rsv *global)
 static int should_alloc_chunk(struct btrfs_fs_info *fs_info,
 			      struct btrfs_space_info *sinfo, int force)
 {
-	struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv;
 	u64 bytes_used = btrfs_space_info_used(sinfo, false);
 	u64 thresh;
 
@@ -4404,14 +4305,6 @@ static int should_alloc_chunk(struct btrfs_fs_info *fs_info,
 		return 1;
 
 	/*
-	 * We need to take into account the global rsv because for all intents
-	 * and purposes it's used space.  Don't worry about locking the
-	 * global_rsv, it doesn't change except when the transaction commits.
-	 */
-	if (sinfo->flags & BTRFS_BLOCK_GROUP_METADATA)
-		bytes_used += calc_global_rsv_need_space(global_rsv);
-
-	/*
 	 * in limited mode, we want to have some free space up to
 	 * about 1% of the FS size.
 	 */
@@ -4741,7 +4634,8 @@ static void shrink_delalloc(struct btrfs_fs_info *fs_info, u64 to_reclaim,
 	struct btrfs_space_info *space_info;
 	struct btrfs_trans_handle *trans;
 	u64 delalloc_bytes;
-	u64 max_reclaim;
+	u64 dio_bytes;
+	u64 async_pages;
 	u64 items;
 	long time_left;
 	unsigned long nr_pages;
@@ -4756,7 +4650,8 @@ static void shrink_delalloc(struct btrfs_fs_info *fs_info, u64 to_reclaim,
 
 	delalloc_bytes = percpu_counter_sum_positive(
 						&fs_info->delalloc_bytes);
-	if (delalloc_bytes == 0) {
+	dio_bytes = percpu_counter_sum_positive(&fs_info->dio_bytes);
+	if (delalloc_bytes == 0 && dio_bytes == 0) {
 		if (trans)
 			return;
 		if (wait_ordered)
@@ -4764,27 +4659,46 @@ static void shrink_delalloc(struct btrfs_fs_info *fs_info, u64 to_reclaim,
 		return;
 	}
 
+	/*
+	 * If we are doing more ordered than delalloc we need to just wait on
+	 * ordered extents, otherwise we'll waste time trying to flush delalloc
+	 * that likely won't give us the space back we need.
+	 */
+	if (dio_bytes > delalloc_bytes)
+		wait_ordered = true;
+
 	loops = 0;
-	while (delalloc_bytes && loops < 3) {
-		max_reclaim = min(delalloc_bytes, to_reclaim);
-		nr_pages = max_reclaim >> PAGE_SHIFT;
+	while ((delalloc_bytes || dio_bytes) && loops < 3) {
+		nr_pages = min(delalloc_bytes, to_reclaim) >> PAGE_SHIFT;
+
+		/*
+		 * Triggers inode writeback for up to nr_pages. This will invoke
+		 * ->writepages callback and trigger delalloc filling
+		 *  (btrfs_run_delalloc_range()).
+		 */
 		btrfs_writeback_inodes_sb_nr(fs_info, nr_pages, items);
+
 		/*
-		 * We need to wait for the async pages to actually start before
-		 * we do anything.
+		 * We need to wait for the compressed pages to start before
+		 * we continue.
 		 */
-		max_reclaim = atomic_read(&fs_info->async_delalloc_pages);
-		if (!max_reclaim)
+		async_pages = atomic_read(&fs_info->async_delalloc_pages);
+		if (!async_pages)
 			goto skip_async;
 
-		if (max_reclaim <= nr_pages)
-			max_reclaim = 0;
+		/*
+		 * Calculate how many compressed pages we want to be written
+		 * before we continue. I.e if there are more async pages than we
+		 * require wait_event will wait until nr_pages are written.
+		 */
+		if (async_pages <= nr_pages)
+			async_pages = 0;
 		else
-			max_reclaim -= nr_pages;
+			async_pages -= nr_pages;
 
 		wait_event(fs_info->async_submit_wait,
 			   atomic_read(&fs_info->async_delalloc_pages) <=
-			   (int)max_reclaim);
+			   (int)async_pages);
 skip_async:
 		spin_lock(&space_info->lock);
 		if (list_empty(&space_info->tickets) &&
@@ -4804,10 +4718,12 @@ skip_async:
 		}
 		delalloc_bytes = percpu_counter_sum_positive(
 						&fs_info->delalloc_bytes);
+		dio_bytes = percpu_counter_sum_positive(&fs_info->dio_bytes);
 	}
 }
 
 struct reserve_ticket {
+	u64 orig_bytes;
 	u64 bytes;
 	int error;
 	struct list_head list;
@@ -4851,10 +4767,19 @@ static int may_commit_transaction(struct btrfs_fs_info *fs_info,
 	if (!bytes_needed)
 		return 0;
 
-	/* See if there is enough pinned space to make this reservation */
-	if (__percpu_counter_compare(&space_info->total_bytes_pinned,
-				   bytes_needed,
-				   BTRFS_TOTAL_BYTES_PINNED_BATCH) >= 0)
+	trans = btrfs_join_transaction(fs_info->extent_root);
+	if (IS_ERR(trans))
+		return PTR_ERR(trans);
+
+	/*
+	 * See if there is enough pinned space to make this reservation, or if
+	 * we have block groups that are going to be freed, allowing us to
+	 * possibly do a chunk allocation the next loop through.
+	 */
+	if (test_bit(BTRFS_TRANS_HAVE_FREE_BGS, &trans->transaction->flags) ||
+	    __percpu_counter_compare(&space_info->total_bytes_pinned,
+				     bytes_needed,
+				     BTRFS_TOTAL_BYTES_PINNED_BATCH) >= 0)
 		goto commit;
 
 	/*
@@ -4862,7 +4787,7 @@ static int may_commit_transaction(struct btrfs_fs_info *fs_info,
 	 * this reservation.
 	 */
 	if (space_info != delayed_rsv->space_info)
-		return -ENOSPC;
+		goto enospc;
 
 	spin_lock(&delayed_rsv->lock);
 	reclaim_bytes += delayed_rsv->reserved;
@@ -4877,16 +4802,14 @@ static int may_commit_transaction(struct btrfs_fs_info *fs_info,
 
 	if (__percpu_counter_compare(&space_info->total_bytes_pinned,
 				   bytes_needed,
-				   BTRFS_TOTAL_BYTES_PINNED_BATCH) < 0) {
-		return -ENOSPC;
-	}
+				   BTRFS_TOTAL_BYTES_PINNED_BATCH) < 0)
+		goto enospc;
 
 commit:
-	trans = btrfs_join_transaction(fs_info->extent_root);
-	if (IS_ERR(trans))
-		return -ENOSPC;
-
 	return btrfs_commit_transaction(trans);
+enospc:
+	btrfs_end_transaction(trans);
+	return -ENOSPC;
 }
 
 /*
@@ -4939,6 +4862,7 @@ static void flush_space(struct btrfs_fs_info *fs_info,
 		btrfs_end_transaction(trans);
 		break;
 	case ALLOC_CHUNK:
+	case ALLOC_CHUNK_FORCE:
 		trans = btrfs_join_transaction(root);
 		if (IS_ERR(trans)) {
 			ret = PTR_ERR(trans);
@@ -4946,7 +4870,8 @@ static void flush_space(struct btrfs_fs_info *fs_info,
 		}
 		ret = do_chunk_alloc(trans,
 				     btrfs_metadata_alloc_profile(fs_info),
-				     CHUNK_ALLOC_NO_FORCE);
+				     (state == ALLOC_CHUNK) ?
+				      CHUNK_ALLOC_NO_FORCE : CHUNK_ALLOC_FORCE);
 		btrfs_end_transaction(trans);
 		if (ret > 0 || ret == -ENOSPC)
 			ret = 0;
@@ -4957,9 +4882,8 @@ static void flush_space(struct btrfs_fs_info *fs_info,
 		 * bunch of pinned space, so make sure we run the iputs before
 		 * we do our pinned bytes check below.
 		 */
-		mutex_lock(&fs_info->cleaner_delayed_iput_mutex);
 		btrfs_run_delayed_iputs(fs_info);
-		mutex_unlock(&fs_info->cleaner_delayed_iput_mutex);
+		btrfs_wait_on_delayed_iputs(fs_info);
 
 		ret = may_commit_transaction(fs_info, space_info);
 		break;
@@ -5030,7 +4954,7 @@ static inline int need_do_async_reclaim(struct btrfs_fs_info *fs_info,
 		!test_bit(BTRFS_FS_STATE_REMOUNTING, &fs_info->fs_state));
 }
 
-static void wake_all_tickets(struct list_head *head)
+static bool wake_all_tickets(struct list_head *head)
 {
 	struct reserve_ticket *ticket;
 
@@ -5039,7 +4963,10 @@ static void wake_all_tickets(struct list_head *head)
 		list_del_init(&ticket->list);
 		ticket->error = -ENOSPC;
 		wake_up(&ticket->wait);
+		if (ticket->bytes != ticket->orig_bytes)
+			return true;
 	}
+	return false;
 }
 
 /*
@@ -5091,11 +5018,28 @@ static void btrfs_async_reclaim_metadata_space(struct work_struct *work)
 				commit_cycles--;
 		}
 
+		/*
+		 * We don't want to force a chunk allocation until we've tried
+		 * pretty hard to reclaim space.  Think of the case where we
+		 * freed up a bunch of space and so have a lot of pinned space
+		 * to reclaim.  We would rather use that than possibly create a
+		 * underutilized metadata chunk.  So if this is our first run
+		 * through the flushing state machine skip ALLOC_CHUNK_FORCE and
+		 * commit the transaction.  If nothing has changed the next go
+		 * around then we can force a chunk allocation.
+		 */
+		if (flush_state == ALLOC_CHUNK_FORCE && !commit_cycles)
+			flush_state++;
+
 		if (flush_state > COMMIT_TRANS) {
 			commit_cycles++;
 			if (commit_cycles > 2) {
-				wake_all_tickets(&space_info->tickets);
-				space_info->flush = 0;
+				if (wake_all_tickets(&space_info->tickets)) {
+					flush_state = FLUSH_DELAYED_ITEMS_NR;
+					commit_cycles--;
+				} else {
+					space_info->flush = 0;
+				}
 			} else {
 				flush_state = FLUSH_DELAYED_ITEMS_NR;
 			}
@@ -5109,12 +5053,18 @@ void btrfs_init_async_reclaim_work(struct work_struct *work)
 	INIT_WORK(work, btrfs_async_reclaim_metadata_space);
 }
 
+static const enum btrfs_flush_state priority_flush_states[] = {
+	FLUSH_DELAYED_ITEMS_NR,
+	FLUSH_DELAYED_ITEMS,
+	ALLOC_CHUNK,
+};
+
 static void priority_reclaim_metadata_space(struct btrfs_fs_info *fs_info,
 					    struct btrfs_space_info *space_info,
 					    struct reserve_ticket *ticket)
 {
 	u64 to_reclaim;
-	int flush_state = FLUSH_DELAYED_ITEMS_NR;
+	int flush_state;
 
 	spin_lock(&space_info->lock);
 	to_reclaim = btrfs_calc_reclaim_metadata_size(fs_info, space_info,
@@ -5125,8 +5075,10 @@ static void priority_reclaim_metadata_space(struct btrfs_fs_info *fs_info,
 	}
 	spin_unlock(&space_info->lock);
 
+	flush_state = 0;
 	do {
-		flush_space(fs_info, space_info, to_reclaim, flush_state);
+		flush_space(fs_info, space_info, to_reclaim,
+			    priority_flush_states[flush_state]);
 		flush_state++;
 		spin_lock(&space_info->lock);
 		if (ticket->bytes == 0) {
@@ -5134,23 +5086,16 @@ static void priority_reclaim_metadata_space(struct btrfs_fs_info *fs_info,
 			return;
 		}
 		spin_unlock(&space_info->lock);
-
-		/*
-		 * Priority flushers can't wait on delalloc without
-		 * deadlocking.
-		 */
-		if (flush_state == FLUSH_DELALLOC ||
-		    flush_state == FLUSH_DELALLOC_WAIT)
-			flush_state = ALLOC_CHUNK;
-	} while (flush_state < COMMIT_TRANS);
+	} while (flush_state < ARRAY_SIZE(priority_flush_states));
 }
 
 static int wait_reserve_ticket(struct btrfs_fs_info *fs_info,
 			       struct btrfs_space_info *space_info,
-			       struct reserve_ticket *ticket, u64 orig_bytes)
+			       struct reserve_ticket *ticket)
 
 {
 	DEFINE_WAIT(wait);
+	u64 reclaim_bytes = 0;
 	int ret = 0;
 
 	spin_lock(&space_info->lock);
@@ -5171,14 +5116,12 @@ static int wait_reserve_ticket(struct btrfs_fs_info *fs_info,
 		ret = ticket->error;
 	if (!list_empty(&ticket->list))
 		list_del_init(&ticket->list);
-	if (ticket->bytes && ticket->bytes < orig_bytes) {
-		u64 num_bytes = orig_bytes - ticket->bytes;
-		update_bytes_may_use(space_info, -num_bytes);
-		trace_btrfs_space_reservation(fs_info, "space_info",
-					      space_info->flags, num_bytes, 0);
-	}
+	if (ticket->bytes && ticket->bytes < ticket->orig_bytes)
+		reclaim_bytes = ticket->orig_bytes - ticket->bytes;
 	spin_unlock(&space_info->lock);
 
+	if (reclaim_bytes)
+		space_info_add_old_bytes(fs_info, space_info, reclaim_bytes);
 	return ret;
 }
 
@@ -5204,6 +5147,7 @@ static int __reserve_metadata_bytes(struct btrfs_fs_info *fs_info,
 {
 	struct reserve_ticket ticket;
 	u64 used;
+	u64 reclaim_bytes = 0;
 	int ret = 0;
 
 	ASSERT(orig_bytes);
@@ -5239,6 +5183,7 @@ static int __reserve_metadata_bytes(struct btrfs_fs_info *fs_info,
 	 * the list and we will do our own flushing further down.
 	 */
 	if (ret && flush != BTRFS_RESERVE_NO_FLUSH) {
+		ticket.orig_bytes = orig_bytes;
 		ticket.bytes = orig_bytes;
 		ticket.error = 0;
 		init_waitqueue_head(&ticket.wait);
@@ -5279,25 +5224,21 @@ static int __reserve_metadata_bytes(struct btrfs_fs_info *fs_info,
 		return ret;
 
 	if (flush == BTRFS_RESERVE_FLUSH_ALL)
-		return wait_reserve_ticket(fs_info, space_info, &ticket,
-					   orig_bytes);
+		return wait_reserve_ticket(fs_info, space_info, &ticket);
 
 	ret = 0;
 	priority_reclaim_metadata_space(fs_info, space_info, &ticket);
 	spin_lock(&space_info->lock);
 	if (ticket.bytes) {
-		if (ticket.bytes < orig_bytes) {
-			u64 num_bytes = orig_bytes - ticket.bytes;
-			update_bytes_may_use(space_info, -num_bytes);
-			trace_btrfs_space_reservation(fs_info, "space_info",
-						      space_info->flags,
-						      num_bytes, 0);
-
-		}
+		if (ticket.bytes < orig_bytes)
+			reclaim_bytes = orig_bytes - ticket.bytes;
 		list_del_init(&ticket.list);
 		ret = -ENOSPC;
 	}
 	spin_unlock(&space_info->lock);
+
+	if (reclaim_bytes)
+		space_info_add_old_bytes(fs_info, space_info, reclaim_bytes);
 	ASSERT(list_empty(&ticket.list));
 	return ret;
 }
@@ -5775,54 +5716,6 @@ int btrfs_block_rsv_refill(struct btrfs_root *root,
 	return ret;
 }
 
-/**
- * btrfs_inode_rsv_refill - refill the inode block rsv.
- * @inode - the inode we are refilling.
- * @flush - the flushing restriction.
- *
- * Essentially the same as btrfs_block_rsv_refill, except it uses the
- * block_rsv->size as the minimum size.  We'll either refill the missing amount
- * or return if we already have enough space.  This will also handle the reserve
- * tracepoint for the reserved amount.
- */
-static int btrfs_inode_rsv_refill(struct btrfs_inode *inode,
-				  enum btrfs_reserve_flush_enum flush)
-{
-	struct btrfs_root *root = inode->root;
-	struct btrfs_block_rsv *block_rsv = &inode->block_rsv;
-	u64 num_bytes = 0;
-	u64 qgroup_num_bytes = 0;
-	int ret = -ENOSPC;
-
-	spin_lock(&block_rsv->lock);
-	if (block_rsv->reserved < block_rsv->size)
-		num_bytes = block_rsv->size - block_rsv->reserved;
-	if (block_rsv->qgroup_rsv_reserved < block_rsv->qgroup_rsv_size)
-		qgroup_num_bytes = block_rsv->qgroup_rsv_size -
-				   block_rsv->qgroup_rsv_reserved;
-	spin_unlock(&block_rsv->lock);
-
-	if (num_bytes == 0)
-		return 0;
-
-	ret = btrfs_qgroup_reserve_meta_prealloc(root, qgroup_num_bytes, true);
-	if (ret)
-		return ret;
-	ret = reserve_metadata_bytes(root, block_rsv, num_bytes, flush);
-	if (!ret) {
-		block_rsv_add_bytes(block_rsv, num_bytes, false);
-		trace_btrfs_space_reservation(root->fs_info, "delalloc",
-					      btrfs_ino(inode), num_bytes, 1);
-
-		/* Don't forget to increase qgroup_rsv_reserved */
-		spin_lock(&block_rsv->lock);
-		block_rsv->qgroup_rsv_reserved += qgroup_num_bytes;
-		spin_unlock(&block_rsv->lock);
-	} else
-		btrfs_qgroup_free_meta_prealloc(root, qgroup_num_bytes);
-	return ret;
-}
-
 static u64 __btrfs_block_rsv_release(struct btrfs_fs_info *fs_info,
 				     struct btrfs_block_rsv *block_rsv,
 				     u64 num_bytes, u64 *qgroup_to_release)
@@ -6115,7 +6008,7 @@ static void btrfs_calculate_inode_block_rsv_size(struct btrfs_fs_info *fs_info,
 	 *
 	 * This is overestimating in most cases.
 	 */
-	qgroup_rsv_size = outstanding_extents * fs_info->nodesize;
+	qgroup_rsv_size = (u64)outstanding_extents * fs_info->nodesize;
 
 	spin_lock(&block_rsv->lock);
 	block_rsv->size = reserve_size;
@@ -6123,9 +6016,25 @@ static void btrfs_calculate_inode_block_rsv_size(struct btrfs_fs_info *fs_info,
 	spin_unlock(&block_rsv->lock);
 }
 
+static void calc_inode_reservations(struct btrfs_fs_info *fs_info,
+				    u64 num_bytes, u64 *meta_reserve,
+				    u64 *qgroup_reserve)
+{
+	u64 nr_extents = count_max_extents(num_bytes);
+	u64 csum_leaves = btrfs_csum_bytes_to_leaves(fs_info, num_bytes);
+
+	/* We add one for the inode update at finish ordered time */
+	*meta_reserve = btrfs_calc_trans_metadata_size(fs_info,
+						nr_extents + csum_leaves + 1);
+	*qgroup_reserve = nr_extents * fs_info->nodesize;
+}
+
 int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes)
 {
-	struct btrfs_fs_info *fs_info = inode->root->fs_info;
+	struct btrfs_root *root = inode->root;
+	struct btrfs_fs_info *fs_info = root->fs_info;
+	struct btrfs_block_rsv *block_rsv = &inode->block_rsv;
+	u64 meta_reserve, qgroup_reserve;
 	unsigned nr_extents;
 	enum btrfs_reserve_flush_enum flush = BTRFS_RESERVE_FLUSH_ALL;
 	int ret = 0;
@@ -6155,7 +6064,31 @@ int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes)
 
 	num_bytes = ALIGN(num_bytes, fs_info->sectorsize);
 
-	/* Add our new extents and calculate the new rsv size. */
+	/*
+	 * We always want to do it this way, every other way is wrong and ends
+	 * in tears.  Pre-reserving the amount we are going to add will always
+	 * be the right way, because otherwise if we have enough parallelism we
+	 * could end up with thousands of inodes all holding little bits of
+	 * reservations they were able to make previously and the only way to
+	 * reclaim that space is to ENOSPC out the operations and clear
+	 * everything out and try again, which is bad.  This way we just
+	 * over-reserve slightly, and clean up the mess when we are done.
+	 */
+	calc_inode_reservations(fs_info, num_bytes, &meta_reserve,
+				&qgroup_reserve);
+	ret = btrfs_qgroup_reserve_meta_prealloc(root, qgroup_reserve, true);
+	if (ret)
+		goto out_fail;
+	ret = reserve_metadata_bytes(root, block_rsv, meta_reserve, flush);
+	if (ret)
+		goto out_qgroup;
+
+	/*
+	 * Now we need to update our outstanding extents and csum bytes _first_
+	 * and then add the reservation to the block_rsv.  This keeps us from
+	 * racing with an ordered completion or some such that would think it
+	 * needs to free the reservation we just made.
+	 */
 	spin_lock(&inode->lock);
 	nr_extents = count_max_extents(num_bytes);
 	btrfs_mod_outstanding_extents(inode, nr_extents);
@@ -6163,22 +6096,21 @@ int btrfs_delalloc_reserve_metadata(struct btrfs_inode *inode, u64 num_bytes)
 	btrfs_calculate_inode_block_rsv_size(fs_info, inode);
 	spin_unlock(&inode->lock);
 
-	ret = btrfs_inode_rsv_refill(inode, flush);
-	if (unlikely(ret))
-		goto out_fail;
+	/* Now we can safely add our space to our block rsv */
+	block_rsv_add_bytes(block_rsv, meta_reserve, false);
+	trace_btrfs_space_reservation(root->fs_info, "delalloc",
+				      btrfs_ino(inode), meta_reserve, 1);
+
+	spin_lock(&block_rsv->lock);
+	block_rsv->qgroup_rsv_reserved += qgroup_reserve;
+	spin_unlock(&block_rsv->lock);
 
 	if (delalloc_lock)
 		mutex_unlock(&inode->delalloc_mutex);
 	return 0;
-
+out_qgroup:
+	btrfs_qgroup_free_meta_prealloc(root, qgroup_reserve);
 out_fail:
-	spin_lock(&inode->lock);
-	nr_extents = count_max_extents(num_bytes);
-	btrfs_mod_outstanding_extents(inode, -nr_extents);
-	inode->csum_bytes -= num_bytes;
-	btrfs_calculate_inode_block_rsv_size(fs_info, inode);
-	spin_unlock(&inode->lock);
-
 	btrfs_inode_rsv_release(inode, true);
 	if (delalloc_lock)
 		mutex_unlock(&inode->delalloc_mutex);
@@ -6302,9 +6234,9 @@ void btrfs_delalloc_release_space(struct inode *inode,
 }
 
 static int update_block_group(struct btrfs_trans_handle *trans,
-			      struct btrfs_fs_info *info, u64 bytenr,
-			      u64 num_bytes, int alloc)
+			      u64 bytenr, u64 num_bytes, int alloc)
 {
+	struct btrfs_fs_info *info = trans->fs_info;
 	struct btrfs_block_group_cache *cache = NULL;
 	u64 total = num_bytes;
 	u64 old_val;
@@ -6385,7 +6317,6 @@ static int update_block_group(struct btrfs_trans_handle *trans,
 		if (list_empty(&cache->dirty_list)) {
 			list_add_tail(&cache->dirty_list,
 				      &trans->transaction->dirty_bgs);
-			trans->transaction->num_dirty_bgs++;
 			trans->delayed_ref_updates++;
 			btrfs_get_block_group(cache);
 		}
@@ -6432,10 +6363,11 @@ static u64 first_logical_byte(struct btrfs_fs_info *fs_info, u64 search_start)
 	return bytenr;
 }
 
-static int pin_down_extent(struct btrfs_fs_info *fs_info,
-			   struct btrfs_block_group_cache *cache,
+static int pin_down_extent(struct btrfs_block_group_cache *cache,
 			   u64 bytenr, u64 num_bytes, int reserved)
 {
+	struct btrfs_fs_info *fs_info = cache->fs_info;
+
 	spin_lock(&cache->space_info->lock);
 	spin_lock(&cache->lock);
 	cache->pinned += num_bytes;
@@ -6467,7 +6399,7 @@ int btrfs_pin_extent(struct btrfs_fs_info *fs_info,
 	cache = btrfs_lookup_block_group(fs_info, bytenr);
 	BUG_ON(!cache); /* Logic error */
 
-	pin_down_extent(fs_info, cache, bytenr, num_bytes, reserved);
+	pin_down_extent(cache, bytenr, num_bytes, reserved);
 
 	btrfs_put_block_group(cache);
 	return 0;
@@ -6494,7 +6426,7 @@ int btrfs_pin_extent_for_log_replay(struct btrfs_fs_info *fs_info,
 	 */
 	cache_block_group(cache, 1);
 
-	pin_down_extent(fs_info, cache, bytenr, num_bytes, 0);
+	pin_down_extent(cache, bytenr, num_bytes, 0);
 
 	/* remove us from the free space cache (if we're there at all) */
 	ret = btrfs_remove_free_space(cache, bytenr, num_bytes);
@@ -6548,9 +6480,9 @@ out_lock:
 	return ret;
 }
 
-int btrfs_exclude_logged_extents(struct btrfs_fs_info *fs_info,
-				 struct extent_buffer *eb)
+int btrfs_exclude_logged_extents(struct extent_buffer *eb)
 {
+	struct btrfs_fs_info *fs_info = eb->fs_info;
 	struct btrfs_file_extent_item *item;
 	struct btrfs_key key;
 	int found_type;
@@ -7139,7 +7071,7 @@ static int __btrfs_free_extent(struct btrfs_trans_handle *trans,
 			goto out;
 		}
 
-		ret = update_block_group(trans, info, bytenr, num_bytes, 0);
+		ret = update_block_group(trans, bytenr, num_bytes, 0);
 		if (ret) {
 			btrfs_abort_transaction(trans, ret);
 			goto out;
@@ -7213,21 +7145,20 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
 			   u64 parent, int last_ref)
 {
 	struct btrfs_fs_info *fs_info = root->fs_info;
+	struct btrfs_ref generic_ref = { 0 };
 	int pin = 1;
 	int ret;
 
+	btrfs_init_generic_ref(&generic_ref, BTRFS_DROP_DELAYED_REF,
+			       buf->start, buf->len, parent);
+	btrfs_init_tree_ref(&generic_ref, btrfs_header_level(buf),
+			    root->root_key.objectid);
+
 	if (root->root_key.objectid != BTRFS_TREE_LOG_OBJECTID) {
 		int old_ref_mod, new_ref_mod;
 
-		btrfs_ref_tree_mod(root, buf->start, buf->len, parent,
-				   root->root_key.objectid,
-				   btrfs_header_level(buf), 0,
-				   BTRFS_DROP_DELAYED_REF);
-		ret = btrfs_add_delayed_tree_ref(trans, buf->start,
-						 buf->len, parent,
-						 root->root_key.objectid,
-						 btrfs_header_level(buf),
-						 BTRFS_DROP_DELAYED_REF, NULL,
+		btrfs_ref_tree_mod(fs_info, &generic_ref);
+		ret = btrfs_add_delayed_tree_ref(trans, &generic_ref, NULL,
 						 &old_ref_mod, &new_ref_mod);
 		BUG_ON(ret); /* -ENOMEM */
 		pin = old_ref_mod >= 0 && new_ref_mod < 0;
@@ -7246,8 +7177,7 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
 		cache = btrfs_lookup_block_group(fs_info, buf->start);
 
 		if (btrfs_header_flag(buf, BTRFS_HEADER_FLAG_WRITTEN)) {
-			pin_down_extent(fs_info, cache, buf->start,
-					buf->len, 1);
+			pin_down_extent(cache, buf->start, buf->len, 1);
 			btrfs_put_block_group(cache);
 			goto out;
 		}
@@ -7261,8 +7191,7 @@ void btrfs_free_tree_block(struct btrfs_trans_handle *trans,
 	}
 out:
 	if (pin)
-		add_pinned_bytes(fs_info, buf->len, true,
-				 root->root_key.objectid);
+		add_pinned_bytes(fs_info, &generic_ref, 1);
 
 	if (last_ref) {
 		/*
@@ -7274,52 +7203,43 @@ out:
 }
 
 /* Can return -ENOMEM */
-int btrfs_free_extent(struct btrfs_trans_handle *trans,
-		      struct btrfs_root *root,
-		      u64 bytenr, u64 num_bytes, u64 parent, u64 root_objectid,
-		      u64 owner, u64 offset)
+int btrfs_free_extent(struct btrfs_trans_handle *trans, struct btrfs_ref *ref)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	int old_ref_mod, new_ref_mod;
 	int ret;
 
 	if (btrfs_is_testing(fs_info))
 		return 0;
 
-	if (root_objectid != BTRFS_TREE_LOG_OBJECTID)
-		btrfs_ref_tree_mod(root, bytenr, num_bytes, parent,
-				   root_objectid, owner, offset,
-				   BTRFS_DROP_DELAYED_REF);
-
 	/*
 	 * tree log blocks never actually go into the extent allocation
 	 * tree, just update pinning info and exit early.
 	 */
-	if (root_objectid == BTRFS_TREE_LOG_OBJECTID) {
-		WARN_ON(owner >= BTRFS_FIRST_FREE_OBJECTID);
+	if ((ref->type == BTRFS_REF_METADATA &&
+	     ref->tree_ref.root == BTRFS_TREE_LOG_OBJECTID) ||
+	    (ref->type == BTRFS_REF_DATA &&
+	     ref->data_ref.ref_root == BTRFS_TREE_LOG_OBJECTID)) {
 		/* unlocks the pinned mutex */
-		btrfs_pin_extent(fs_info, bytenr, num_bytes, 1);
+		btrfs_pin_extent(fs_info, ref->bytenr, ref->len, 1);
 		old_ref_mod = new_ref_mod = 0;
 		ret = 0;
-	} else if (owner < BTRFS_FIRST_FREE_OBJECTID) {
-		ret = btrfs_add_delayed_tree_ref(trans, bytenr,
-						 num_bytes, parent,
-						 root_objectid, (int)owner,
-						 BTRFS_DROP_DELAYED_REF, NULL,
+	} else if (ref->type == BTRFS_REF_METADATA) {
+		ret = btrfs_add_delayed_tree_ref(trans, ref, NULL,
 						 &old_ref_mod, &new_ref_mod);
 	} else {
-		ret = btrfs_add_delayed_data_ref(trans, bytenr,
-						 num_bytes, parent,
-						 root_objectid, owner, offset,
-						 0, BTRFS_DROP_DELAYED_REF,
+		ret = btrfs_add_delayed_data_ref(trans, ref, 0,
 						 &old_ref_mod, &new_ref_mod);
 	}
 
-	if (ret == 0 && old_ref_mod >= 0 && new_ref_mod < 0) {
-		bool metadata = owner < BTRFS_FIRST_FREE_OBJECTID;
+	if (!((ref->type == BTRFS_REF_METADATA &&
+	       ref->tree_ref.root == BTRFS_TREE_LOG_OBJECTID) ||
+	      (ref->type == BTRFS_REF_DATA &&
+	       ref->data_ref.ref_root == BTRFS_TREE_LOG_OBJECTID)))
+		btrfs_ref_tree_mod(fs_info, ref);
 
-		add_pinned_bytes(fs_info, num_bytes, metadata, root_objectid);
-	}
+	if (ret == 0 && old_ref_mod >= 0 && new_ref_mod < 0)
+		add_pinned_bytes(fs_info, ref, 1);
 
 	return ret;
 }
@@ -7510,7 +7430,6 @@ static int find_free_extent_clustered(struct btrfs_block_group_cache *bg,
 		struct find_free_extent_ctl *ffe_ctl,
 		struct btrfs_block_group_cache **cluster_bg_ret)
 {
-	struct btrfs_fs_info *fs_info = bg->fs_info;
 	struct btrfs_block_group_cache *cluster_bg;
 	u64 aligned_cluster;
 	u64 offset;
@@ -7570,9 +7489,8 @@ refill_cluster:
 	aligned_cluster = max_t(u64,
 			ffe_ctl->empty_cluster + ffe_ctl->empty_size,
 			bg->full_stripe_len);
-	ret = btrfs_find_space_cluster(fs_info, bg, last_ptr,
-			ffe_ctl->search_start, ffe_ctl->num_bytes,
-			aligned_cluster);
+	ret = btrfs_find_space_cluster(bg, last_ptr, ffe_ctl->search_start,
+			ffe_ctl->num_bytes, aligned_cluster);
 	if (ret == 0) {
 		/* Now pull our allocation out of this cluster */
 		offset = btrfs_alloc_from_cluster(bg, last_ptr,
@@ -8066,6 +7984,15 @@ loop:
 	return ret;
 }
 
+#define DUMP_BLOCK_RSV(fs_info, rsv_name)				\
+do {									\
+	struct btrfs_block_rsv *__rsv = &(fs_info)->rsv_name;		\
+	spin_lock(&__rsv->lock);					\
+	btrfs_info(fs_info, #rsv_name ": size %llu reserved %llu",	\
+		   __rsv->size, __rsv->reserved);			\
+	spin_unlock(&__rsv->lock);					\
+} while (0)
+
 static void dump_space_info(struct btrfs_fs_info *fs_info,
 			    struct btrfs_space_info *info, u64 bytes,
 			    int dump_block_groups)
@@ -8085,6 +8012,12 @@ static void dump_space_info(struct btrfs_fs_info *fs_info,
 		info->bytes_readonly);
 	spin_unlock(&info->lock);
 
+	DUMP_BLOCK_RSV(fs_info, global_block_rsv);
+	DUMP_BLOCK_RSV(fs_info, trans_block_rsv);
+	DUMP_BLOCK_RSV(fs_info, chunk_block_rsv);
+	DUMP_BLOCK_RSV(fs_info, delayed_block_rsv);
+	DUMP_BLOCK_RSV(fs_info, delayed_refs_rsv);
+
 	if (!dump_block_groups)
 		return;
 
@@ -8207,7 +8140,7 @@ static int __btrfs_free_reserved_extent(struct btrfs_fs_info *fs_info,
 	}
 
 	if (pin)
-		pin_down_extent(fs_info, cache, start, len, 1);
+		pin_down_extent(cache, start, len, 1);
 	else {
 		if (btrfs_test_opt(fs_info, DISCARD))
 			ret = btrfs_discard_extent(fs_info, start, len, NULL);
@@ -8296,7 +8229,7 @@ static int alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
 	if (ret)
 		return ret;
 
-	ret = update_block_group(trans, fs_info, ins->objectid, ins->offset, 1);
+	ret = update_block_group(trans, ins->objectid, ins->offset, 1);
 	if (ret) { /* -ENOENT, logic error */
 		btrfs_err(fs_info, "update block group failed for %llu %llu",
 			ins->objectid, ins->offset);
@@ -8386,7 +8319,7 @@ static int alloc_reserved_tree_block(struct btrfs_trans_handle *trans,
 	if (ret)
 		return ret;
 
-	ret = update_block_group(trans, fs_info, extent_key.objectid,
+	ret = update_block_group(trans, extent_key.objectid,
 				 fs_info->nodesize, 1);
 	if (ret) { /* -ENOENT, logic error */
 		btrfs_err(fs_info, "update block group failed for %llu %llu",
@@ -8404,19 +8337,17 @@ int btrfs_alloc_reserved_file_extent(struct btrfs_trans_handle *trans,
 				     u64 offset, u64 ram_bytes,
 				     struct btrfs_key *ins)
 {
+	struct btrfs_ref generic_ref = { 0 };
 	int ret;
 
 	BUG_ON(root->root_key.objectid == BTRFS_TREE_LOG_OBJECTID);
 
-	btrfs_ref_tree_mod(root, ins->objectid, ins->offset, 0,
-			   root->root_key.objectid, owner, offset,
-			   BTRFS_ADD_DELAYED_EXTENT);
-
-	ret = btrfs_add_delayed_data_ref(trans, ins->objectid,
-					 ins->offset, 0,
-					 root->root_key.objectid, owner,
-					 offset, ram_bytes,
-					 BTRFS_ADD_DELAYED_EXTENT, NULL, NULL);
+	btrfs_init_generic_ref(&generic_ref, BTRFS_ADD_DELAYED_EXTENT,
+			       ins->objectid, ins->offset, 0);
+	btrfs_init_data_ref(&generic_ref, root->root_key.objectid, owner, offset);
+	btrfs_ref_tree_mod(root->fs_info, &generic_ref);
+	ret = btrfs_add_delayed_data_ref(trans, &generic_ref,
+					 ram_bytes, NULL, NULL);
 	return ret;
 }
 
@@ -8489,10 +8420,10 @@ btrfs_init_new_buffer(struct btrfs_trans_handle *trans, struct btrfs_root *root,
 
 	btrfs_set_buffer_lockdep_class(root->root_key.objectid, buf, level);
 	btrfs_tree_lock(buf);
-	clean_tree_block(fs_info, buf);
+	btrfs_clean_tree_block(buf);
 	clear_bit(EXTENT_BUFFER_STALE, &buf->bflags);
 
-	btrfs_set_lock_blocking(buf);
+	btrfs_set_lock_blocking_write(buf);
 	set_extent_buffer_uptodate(buf);
 
 	memzero_extent_buffer(buf, 0, sizeof(struct btrfs_header));
@@ -8608,6 +8539,7 @@ struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
 	struct btrfs_block_rsv *block_rsv;
 	struct extent_buffer *buf;
 	struct btrfs_delayed_extent_op *extent_op;
+	struct btrfs_ref generic_ref = { 0 };
 	u64 flags = 0;
 	int ret;
 	u32 blocksize = fs_info->nodesize;
@@ -8662,13 +8594,12 @@ struct extent_buffer *btrfs_alloc_tree_block(struct btrfs_trans_handle *trans,
 		extent_op->is_data = false;
 		extent_op->level = level;
 
-		btrfs_ref_tree_mod(root, ins.objectid, ins.offset, parent,
-				   root_objectid, level, 0,
-				   BTRFS_ADD_DELAYED_EXTENT);
-		ret = btrfs_add_delayed_tree_ref(trans, ins.objectid,
-						 ins.offset, parent,
-						 root_objectid, level,
-						 BTRFS_ADD_DELAYED_EXTENT,
+		btrfs_init_generic_ref(&generic_ref, BTRFS_ADD_DELAYED_EXTENT,
+				       ins.objectid, ins.offset, parent);
+		generic_ref.real_root = root->root_key.objectid;
+		btrfs_init_tree_ref(&generic_ref, level, root_objectid);
+		btrfs_ref_tree_mod(fs_info, &generic_ref);
+		ret = btrfs_add_delayed_tree_ref(trans, &generic_ref,
 						 extent_op, NULL, NULL);
 		if (ret)
 			goto out_free_delayed;
@@ -8690,6 +8621,8 @@ struct walk_control {
 	u64 refs[BTRFS_MAX_LEVEL];
 	u64 flags[BTRFS_MAX_LEVEL];
 	struct btrfs_key update_progress;
+	struct btrfs_key drop_progress;
+	int drop_level;
 	int stage;
 	int level;
 	int shared_level;
@@ -8697,6 +8630,7 @@ struct walk_control {
 	int keep_locks;
 	int reada_slot;
 	int reada_count;
+	int restarted;
 };
 
 #define DROP_REFERENCE	1
@@ -8841,7 +8775,7 @@ static noinline int walk_down_proc(struct btrfs_trans_handle *trans,
 		BUG_ON(ret); /* -ENOMEM */
 		ret = btrfs_dec_ref(trans, root, eb, 0);
 		BUG_ON(ret); /* -ENOMEM */
-		ret = btrfs_set_disk_extent_flags(trans, fs_info, eb->start,
+		ret = btrfs_set_disk_extent_flags(trans, eb->start,
 						  eb->len, flag,
 						  btrfs_header_level(eb), 0);
 		BUG_ON(ret); /* -ENOMEM */
@@ -8860,6 +8794,33 @@ static noinline int walk_down_proc(struct btrfs_trans_handle *trans,
 }
 
 /*
+ * This is used to verify a ref exists for this root to deal with a bug where we
+ * would have a drop_progress key that hadn't been updated properly.
+ */
+static int check_ref_exists(struct btrfs_trans_handle *trans,
+			    struct btrfs_root *root, u64 bytenr, u64 parent,
+			    int level)
+{
+	struct btrfs_path *path;
+	struct btrfs_extent_inline_ref *iref;
+	int ret;
+
+	path = btrfs_alloc_path();
+	if (!path)
+		return -ENOMEM;
+
+	ret = lookup_extent_backref(trans, path, &iref, bytenr,
+				    root->fs_info->nodesize, parent,
+				    root->root_key.objectid, level, 0);
+	btrfs_free_path(path);
+	if (ret == -ENOENT)
+		return 0;
+	if (ret < 0)
+		return ret;
+	return 1;
+}
+
+/*
  * helper to process tree block pointer.
  *
  * when wc->stage == DROP_REFERENCE, this function checks
@@ -8883,6 +8844,7 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
 	u64 parent;
 	struct btrfs_key key;
 	struct btrfs_key first_key;
+	struct btrfs_ref ref = { 0 };
 	struct extent_buffer *next;
 	int level = wc->level;
 	int reada = 0;
@@ -8917,7 +8879,7 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
 		reada = 1;
 	}
 	btrfs_tree_lock(next);
-	btrfs_set_lock_blocking(next);
+	btrfs_set_lock_blocking_write(next);
 
 	ret = btrfs_lookup_extent_info(trans, fs_info, bytenr, level - 1, 1,
 				       &wc->refs[level - 1],
@@ -8977,7 +8939,7 @@ static noinline int do_walk_down(struct btrfs_trans_handle *trans,
 			return -EIO;
 		}
 		btrfs_tree_lock(next);
-		btrfs_set_lock_blocking(next);
+		btrfs_set_lock_blocking_write(next);
 	}
 
 	level--;
@@ -9014,6 +8976,23 @@ skip:
 		}
 
 		/*
+		 * If we had a drop_progress we need to verify the refs are set
+		 * as expected.  If we find our ref then we know that from here
+		 * on out everything should be correct, and we can clear the
+		 * ->restarted flag.
+		 */
+		if (wc->restarted) {
+			ret = check_ref_exists(trans, root, bytenr, parent,
+					       level - 1);
+			if (ret < 0)
+				goto out_unlock;
+			if (ret == 0)
+				goto no_delete;
+			ret = 0;
+			wc->restarted = 0;
+		}
+
+		/*
 		 * Reloc tree doesn't contribute to qgroup numbers, and we have
 		 * already accounted them at merge time (replace_path),
 		 * thus we could skip expensive subtree trace here.
@@ -9028,13 +9007,24 @@ skip:
 					     ret);
 			}
 		}
-		ret = btrfs_free_extent(trans, root, bytenr, fs_info->nodesize,
-					parent, root->root_key.objectid,
-					level - 1, 0);
+
+		/*
+		 * We need to update the next key in our walk control so we can
+		 * update the drop_progress key accordingly.  We don't care if
+		 * find_next_key doesn't find a key because that means we're at
+		 * the end and are going to clean up now.
+		 */
+		wc->drop_level = level;
+		find_next_key(path, level, &wc->drop_progress);
+
+		btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF, bytenr,
+				       fs_info->nodesize, parent);
+		btrfs_init_tree_ref(&ref, level - 1, root->root_key.objectid);
+		ret = btrfs_free_extent(trans, &ref);
 		if (ret)
 			goto out_unlock;
 	}
-
+no_delete:
 	*lookup_info = 1;
 	ret = 1;
 
@@ -9089,7 +9079,7 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans,
 		if (!path->locks[level]) {
 			BUG_ON(level == 0);
 			btrfs_tree_lock(eb);
-			btrfs_set_lock_blocking(eb);
+			btrfs_set_lock_blocking_write(eb);
 			path->locks[level] = BTRFS_WRITE_LOCK_BLOCKING;
 
 			ret = btrfs_lookup_extent_info(trans, fs_info,
@@ -9120,21 +9110,23 @@ static noinline int walk_up_proc(struct btrfs_trans_handle *trans,
 			else
 				ret = btrfs_dec_ref(trans, root, eb, 0);
 			BUG_ON(ret); /* -ENOMEM */
-			ret = btrfs_qgroup_trace_leaf_items(trans, eb);
-			if (ret) {
-				btrfs_err_rl(fs_info,
-					     "error %d accounting leaf items. Quota is out of sync, rescan required.",
+			if (is_fstree(root->root_key.objectid)) {
+				ret = btrfs_qgroup_trace_leaf_items(trans, eb);
+				if (ret) {
+					btrfs_err_rl(fs_info,
+	"error %d accounting leaf items, quota is out of sync, rescan required",
 					     ret);
+				}
 			}
 		}
-		/* make block locked assertion in clean_tree_block happy */
+		/* make block locked assertion in btrfs_clean_tree_block happy */
 		if (!path->locks[level] &&
 		    btrfs_header_generation(eb) == trans->transid) {
 			btrfs_tree_lock(eb);
-			btrfs_set_lock_blocking(eb);
+			btrfs_set_lock_blocking_write(eb);
 			path->locks[level] = BTRFS_WRITE_LOCK_BLOCKING;
 		}
-		clean_tree_block(fs_info, eb);
+		btrfs_clean_tree_block(eb);
 	}
 
 	if (eb == root->node) {
@@ -9298,7 +9290,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 	if (btrfs_disk_key_objectid(&root_item->drop_progress) == 0) {
 		level = btrfs_header_level(root->node);
 		path->nodes[level] = btrfs_lock_root_node(root);
-		btrfs_set_lock_blocking(path->nodes[level]);
+		btrfs_set_lock_blocking_write(path->nodes[level]);
 		path->slots[level] = 0;
 		path->locks[level] = BTRFS_WRITE_LOCK_BLOCKING;
 		memset(&wc->update_progress, 0,
@@ -9328,7 +9320,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 		level = btrfs_header_level(root->node);
 		while (1) {
 			btrfs_tree_lock(path->nodes[level]);
-			btrfs_set_lock_blocking(path->nodes[level]);
+			btrfs_set_lock_blocking_write(path->nodes[level]);
 			path->locks[level] = BTRFS_WRITE_LOCK_BLOCKING;
 
 			ret = btrfs_lookup_extent_info(trans, fs_info,
@@ -9351,6 +9343,7 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 		}
 	}
 
+	wc->restarted = test_bit(BTRFS_ROOT_DEAD_TREE, &root->state);
 	wc->level = level;
 	wc->shared_level = -1;
 	wc->stage = DROP_REFERENCE;
@@ -9378,12 +9371,14 @@ int btrfs_drop_snapshot(struct btrfs_root *root,
 		}
 
 		if (wc->stage == DROP_REFERENCE) {
-			level = wc->level;
-			btrfs_node_key(path->nodes[level],
-				       &root_item->drop_progress,
-				       path->slots[level]);
-			root_item->drop_level = level;
+			wc->drop_level = wc->level;
+			btrfs_node_key_to_cpu(path->nodes[wc->drop_level],
+					      &wc->drop_progress,
+					      path->slots[wc->drop_level]);
 		}
+		btrfs_cpu_key_to_disk(&root_item->drop_progress,
+				      &wc->drop_progress);
+		root_item->drop_level = wc->drop_level;
 
 		BUG_ON(wc->level == 0);
 		if (btrfs_should_end_transaction(trans) ||
@@ -9595,6 +9590,7 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
 {
 	struct btrfs_space_info *sinfo = cache->space_info;
 	u64 num_bytes;
+	u64 sinfo_used;
 	u64 min_allocable_bytes;
 	int ret = -ENOSPC;
 
@@ -9621,9 +9617,10 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
 
 	num_bytes = cache->key.offset - cache->reserved - cache->pinned -
 		    cache->bytes_super - btrfs_block_group_used(&cache->item);
+	sinfo_used = btrfs_space_info_used(sinfo, true);
 
-	if (btrfs_space_info_used(sinfo, true) + num_bytes +
-	    min_allocable_bytes <= sinfo->total_bytes) {
+	if (sinfo_used + num_bytes + min_allocable_bytes <=
+	    sinfo->total_bytes) {
 		sinfo->bytes_readonly += num_bytes;
 		cache->ro++;
 		list_add_tail(&cache->ro_list, &sinfo->ro_bgs);
@@ -9632,6 +9629,15 @@ static int inc_block_group_ro(struct btrfs_block_group_cache *cache, int force)
 out:
 	spin_unlock(&cache->lock);
 	spin_unlock(&sinfo->lock);
+	if (ret == -ENOSPC && btrfs_test_opt(cache->fs_info, ENOSPC_DEBUG)) {
+		btrfs_info(cache->fs_info,
+			"unable to make block group %llu ro",
+			cache->key.objectid);
+		btrfs_info(cache->fs_info,
+			"sinfo_used=%llu bg_num_bytes=%llu min_allocable=%llu",
+			sinfo_used, num_bytes, min_allocable_bytes);
+		dump_space_info(cache->fs_info, cache->space_info, 0, 0);
+	}
 	return ret;
 }
 
@@ -9776,12 +9782,10 @@ void btrfs_dec_block_group_ro(struct btrfs_block_group_cache *cache)
  */
 int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr)
 {
-	struct btrfs_root *root = fs_info->extent_root;
 	struct btrfs_block_group_cache *block_group;
 	struct btrfs_space_info *space_info;
 	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
 	struct btrfs_device *device;
-	struct btrfs_trans_handle *trans;
 	u64 min_free;
 	u64 dev_min = 1;
 	u64 dev_nr = 0;
@@ -9880,13 +9884,6 @@ int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr)
 		min_free = div64_u64(min_free, dev_min);
 	}
 
-	/* We need to do this so that we can look at pending chunks */
-	trans = btrfs_join_transaction(root);
-	if (IS_ERR(trans)) {
-		ret = PTR_ERR(trans);
-		goto out;
-	}
-
 	mutex_lock(&fs_info->chunk_mutex);
 	list_for_each_entry(device, &fs_devices->alloc_list, dev_alloc_list) {
 		u64 dev_offset;
@@ -9897,7 +9894,7 @@ int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr)
 		 */
 		if (device->total_bytes > device->bytes_used + min_free &&
 		    !test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state)) {
-			ret = find_free_dev_extent(trans, device, min_free,
+			ret = find_free_dev_extent(device, min_free,
 						   &dev_offset, NULL);
 			if (!ret)
 				dev_nr++;
@@ -9913,7 +9910,6 @@ int btrfs_can_relocate(struct btrfs_fs_info *fs_info, u64 bytenr)
 			   "no space to allocate a new chunk for block group %llu",
 			   block_group->key.objectid);
 	mutex_unlock(&fs_info->chunk_mutex);
-	btrfs_end_transaction(trans);
 out:
 	btrfs_put_block_group(block_group);
 	return ret;
@@ -10014,7 +10010,7 @@ void btrfs_put_block_group_cache(struct btrfs_fs_info *info)
 			if (block_group->iref)
 				break;
 			spin_unlock(&block_group->lock);
-			block_group = next_block_group(info, block_group);
+			block_group = next_block_group(block_group);
 		}
 		if (!block_group) {
 			if (last == 0)
@@ -10515,7 +10511,7 @@ int btrfs_make_block_group(struct btrfs_trans_handle *trans, u64 bytes_used,
 	struct btrfs_block_group_cache *cache;
 	int ret;
 
-	btrfs_set_log_full_commit(fs_info, trans);
+	btrfs_set_log_full_commit(trans);
 
 	cache = btrfs_create_block_group_cache(fs_info, chunk_offset, size);
 	if (!cache)
@@ -10663,7 +10659,7 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
 	 * get the inode first so any iput calls done for the io_list
 	 * aren't the final iput (no unlinks allowed now)
 	 */
-	inode = lookup_free_space_inode(fs_info, block_group, path);
+	inode = lookup_free_space_inode(block_group, path);
 
 	mutex_lock(&trans->transaction->cache_write_mutex);
 	/*
@@ -10781,13 +10777,10 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
 	}
 
 	spin_lock(&trans->transaction->dirty_bgs_lock);
-	if (!list_empty(&block_group->dirty_list)) {
-		WARN_ON(1);
-	}
-	if (!list_empty(&block_group->io_list)) {
-		WARN_ON(1);
-	}
+	WARN_ON(!list_empty(&block_group->dirty_list));
+	WARN_ON(!list_empty(&block_group->io_list));
 	spin_unlock(&trans->transaction->dirty_bgs_lock);
+
 	btrfs_remove_free_space_cache(block_group);
 
 	spin_lock(&block_group->space_info->lock);
@@ -10810,10 +10803,6 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
 	memcpy(&key, &block_group->key, sizeof(key));
 
 	mutex_lock(&fs_info->chunk_mutex);
-	if (!list_empty(&em->list)) {
-		/* We're in the transaction->pending_chunks list. */
-		free_extent_map(em);
-	}
 	spin_lock(&block_group->lock);
 	block_group->removed = 1;
 	/*
@@ -10840,43 +10829,8 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
 	 * the transaction commit has completed.
 	 */
 	remove_em = (atomic_read(&block_group->trimming) == 0);
-	/*
-	 * Make sure a trimmer task always sees the em in the pinned_chunks list
-	 * if it sees block_group->removed == 1 (needs to lock block_group->lock
-	 * before checking block_group->removed).
-	 */
-	if (!remove_em) {
-		/*
-		 * Our em might be in trans->transaction->pending_chunks which
-		 * is protected by fs_info->chunk_mutex ([lock|unlock]_chunks),
-		 * and so is the fs_info->pinned_chunks list.
-		 *
-		 * So at this point we must be holding the chunk_mutex to avoid
-		 * any races with chunk allocation (more specifically at
-		 * volumes.c:contains_pending_extent()), to ensure it always
-		 * sees the em, either in the pending_chunks list or in the
-		 * pinned_chunks list.
-		 */
-		list_move_tail(&em->list, &fs_info->pinned_chunks);
-	}
 	spin_unlock(&block_group->lock);
 
-	if (remove_em) {
-		struct extent_map_tree *em_tree;
-
-		em_tree = &fs_info->mapping_tree.map_tree;
-		write_lock(&em_tree->lock);
-		/*
-		 * The em might be in the pending_chunks list, so make sure the
-		 * chunk mutex is locked, since remove_extent_mapping() will
-		 * delete us from that list.
-		 */
-		remove_extent_mapping(em_tree, em);
-		write_unlock(&em_tree->lock);
-		/* once for the tree */
-		free_extent_map(em);
-	}
-
 	mutex_unlock(&fs_info->chunk_mutex);
 
 	ret = remove_block_group_free_space(trans, block_group);
@@ -10893,6 +10847,19 @@ int btrfs_remove_block_group(struct btrfs_trans_handle *trans,
 		goto out;
 
 	ret = btrfs_del_item(trans, root, path);
+	if (ret)
+		goto out;
+
+	if (remove_em) {
+		struct extent_map_tree *em_tree;
+
+		em_tree = &fs_info->mapping_tree.map_tree;
+		write_lock(&em_tree->lock);
+		remove_extent_mapping(em_tree, em);
+		write_unlock(&em_tree->lock);
+		/* once for the tree */
+		free_extent_map(em);
+	}
 out:
 	if (remove_rsv)
 		btrfs_delayed_refs_rsv_release(fs_info, 1);
@@ -11172,10 +11139,9 @@ int btrfs_error_unpin_extent_range(struct btrfs_fs_info *fs_info,
  * it while performing the free space search since we have already
  * held back allocations.
  */
-static int btrfs_trim_free_extents(struct btrfs_device *device,
-				   u64 minlen, u64 *trimmed)
+static int btrfs_trim_free_extents(struct btrfs_device *device, u64 *trimmed)
 {
-	u64 start = 0, len = 0;
+	u64 start = SZ_1M, len = 0, end = 0;
 	int ret;
 
 	*trimmed = 0;
@@ -11196,43 +11162,36 @@ static int btrfs_trim_free_extents(struct btrfs_device *device,
 
 	while (1) {
 		struct btrfs_fs_info *fs_info = device->fs_info;
-		struct btrfs_transaction *trans;
 		u64 bytes;
 
 		ret = mutex_lock_interruptible(&fs_info->chunk_mutex);
 		if (ret)
 			break;
 
-		ret = down_read_killable(&fs_info->commit_root_sem);
-		if (ret) {
-			mutex_unlock(&fs_info->chunk_mutex);
-			break;
-		}
-
-		spin_lock(&fs_info->trans_lock);
-		trans = fs_info->running_transaction;
-		if (trans)
-			refcount_inc(&trans->use_count);
-		spin_unlock(&fs_info->trans_lock);
-
-		if (!trans)
-			up_read(&fs_info->commit_root_sem);
-
-		ret = find_free_dev_extent_start(trans, device, minlen, start,
-						 &start, &len);
-		if (trans) {
-			up_read(&fs_info->commit_root_sem);
-			btrfs_put_transaction(trans);
-		}
+		find_first_clear_extent_bit(&device->alloc_state, start,
+					    &start, &end,
+					    CHUNK_TRIMMED | CHUNK_ALLOCATED);
+		/*
+		 * If find_first_clear_extent_bit find a range that spans the
+		 * end of the device it will set end to -1, in this case it's up
+		 * to the caller to trim the value to the size of the device.
+		 */
+		end = min(end, device->total_bytes - 1);
+		len = end - start + 1;
 
-		if (ret) {
+		/* We didn't find any extents */
+		if (!len) {
 			mutex_unlock(&fs_info->chunk_mutex);
-			if (ret == -ENOSPC)
-				ret = 0;
+			ret = 0;
 			break;
 		}
 
-		ret = btrfs_issue_discard(device->bdev, start, len, &bytes);
+		ret = btrfs_issue_discard(device->bdev, start, len,
+					  &bytes);
+		if (!ret)
+			set_extent_bits(&device->alloc_state, start,
+					start + bytes - 1,
+					CHUNK_TRIMMED);
 		mutex_unlock(&fs_info->chunk_mutex);
 
 		if (ret)
@@ -11277,7 +11236,7 @@ int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range)
 	int ret = 0;
 
 	cache = btrfs_lookup_first_block_group(fs_info, range->start);
-	for (; cache; cache = next_block_group(fs_info, cache)) {
+	for (; cache; cache = next_block_group(cache)) {
 		if (cache->key.objectid >= (range->start + range->len)) {
 			btrfs_put_block_group(cache);
 			break;
@@ -11324,8 +11283,7 @@ int btrfs_trim_fs(struct btrfs_fs_info *fs_info, struct fstrim_range *range)
 	mutex_lock(&fs_info->fs_devices->device_list_mutex);
 	devices = &fs_info->fs_devices->devices;
 	list_for_each_entry(device, devices, dev_list) {
-		ret = btrfs_trim_free_extents(device, range->minlen,
-					      &group_trimmed);
+		ret = btrfs_trim_free_extents(device, &group_trimmed);
 		if (ret) {
 			dev_failed++;
 			dev_ret = ret;
diff --git a/fs/btrfs/extent_io.c b/fs/btrfs/extent_io.c
index 52abe4082680..db337e53aab3 100644
--- a/fs/btrfs/extent_io.c
+++ b/fs/btrfs/extent_io.c
@@ -109,8 +109,6 @@ static inline void __btrfs_debug_check_extent_io_range(const char *caller,
 #define btrfs_debug_check_extent_io_range(c, s, e)	do {} while (0)
 #endif
 
-#define BUFFER_LRU_MAX 64
-
 struct tree_entry {
 	u64 start;
 	u64 end;
@@ -147,7 +145,56 @@ static int add_extent_changeset(struct extent_state *state, unsigned bits,
 	return ret;
 }
 
-static void flush_write_bio(struct extent_page_data *epd);
+static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
+				       unsigned long bio_flags)
+{
+	blk_status_t ret = 0;
+	struct extent_io_tree *tree = bio->bi_private;
+
+	bio->bi_private = NULL;
+
+	if (tree->ops)
+		ret = tree->ops->submit_bio_hook(tree->private_data, bio,
+						 mirror_num, bio_flags);
+	else
+		btrfsic_submit_bio(bio);
+
+	return blk_status_to_errno(ret);
+}
+
+/* Cleanup unsubmitted bios */
+static void end_write_bio(struct extent_page_data *epd, int ret)
+{
+	if (epd->bio) {
+		epd->bio->bi_status = errno_to_blk_status(ret);
+		bio_endio(epd->bio);
+		epd->bio = NULL;
+	}
+}
+
+/*
+ * Submit bio from extent page data via submit_one_bio
+ *
+ * Return 0 if everything is OK.
+ * Return <0 for error.
+ */
+static int __must_check flush_write_bio(struct extent_page_data *epd)
+{
+	int ret = 0;
+
+	if (epd->bio) {
+		ret = submit_one_bio(epd->bio, 0, 0);
+		/*
+		 * Clean up of epd->bio is handled by its endio function.
+		 * And endio is either triggered by successful bio execution
+		 * or the error handler of submit bio hook.
+		 * So at this point, no matter what happened, we don't need
+		 * to clean up epd->bio.
+		 */
+		epd->bio = NULL;
+	}
+	return ret;
+}
 
 int __init extent_io_init(void)
 {
@@ -200,14 +247,46 @@ void __cold extent_io_exit(void)
 	bioset_exit(&btrfs_bioset);
 }
 
-void extent_io_tree_init(struct extent_io_tree *tree,
+void extent_io_tree_init(struct btrfs_fs_info *fs_info,
+			 struct extent_io_tree *tree, unsigned int owner,
 			 void *private_data)
 {
+	tree->fs_info = fs_info;
 	tree->state = RB_ROOT;
 	tree->ops = NULL;
 	tree->dirty_bytes = 0;
 	spin_lock_init(&tree->lock);
 	tree->private_data = private_data;
+	tree->owner = owner;
+}
+
+void extent_io_tree_release(struct extent_io_tree *tree)
+{
+	spin_lock(&tree->lock);
+	/*
+	 * Do a single barrier for the waitqueue_active check here, the state
+	 * of the waitqueue should not change once extent_io_tree_release is
+	 * called.
+	 */
+	smp_mb();
+	while (!RB_EMPTY_ROOT(&tree->state)) {
+		struct rb_node *node;
+		struct extent_state *state;
+
+		node = rb_first(&tree->state);
+		state = rb_entry(node, struct extent_state, rb_node);
+		rb_erase(&state->rb_node, &tree->state);
+		RB_CLEAR_NODE(&state->rb_node);
+		/*
+		 * btree io trees aren't supposed to have tasks waiting for
+		 * changes in the flags of extent states ever.
+		 */
+		ASSERT(!waitqueue_active(&state->wq));
+		free_extent_state(state);
+
+		cond_resched_lock(&tree->lock);
+	}
+	spin_unlock(&tree->lock);
 }
 
 static struct extent_state *alloc_extent_state(gfp_t mask)
@@ -281,8 +360,8 @@ do_insert:
 }
 
 static struct rb_node *__etree_search(struct extent_io_tree *tree, u64 offset,
-				      struct rb_node **prev_ret,
 				      struct rb_node **next_ret,
+				      struct rb_node **prev_ret,
 				      struct rb_node ***p_ret,
 				      struct rb_node **parent_ret)
 {
@@ -311,23 +390,23 @@ static struct rb_node *__etree_search(struct extent_io_tree *tree, u64 offset,
 	if (parent_ret)
 		*parent_ret = prev;
 
-	if (prev_ret) {
+	if (next_ret) {
 		orig_prev = prev;
 		while (prev && offset > prev_entry->end) {
 			prev = rb_next(prev);
 			prev_entry = rb_entry(prev, struct tree_entry, rb_node);
 		}
-		*prev_ret = prev;
+		*next_ret = prev;
 		prev = orig_prev;
 	}
 
-	if (next_ret) {
+	if (prev_ret) {
 		prev_entry = rb_entry(prev, struct tree_entry, rb_node);
 		while (prev && offset < prev_entry->start) {
 			prev = rb_prev(prev);
 			prev_entry = rb_entry(prev, struct tree_entry, rb_node);
 		}
-		*next_ret = prev;
+		*prev_ret = prev;
 	}
 	return NULL;
 }
@@ -338,12 +417,12 @@ tree_search_for_insert(struct extent_io_tree *tree,
 		       struct rb_node ***p_ret,
 		       struct rb_node **parent_ret)
 {
-	struct rb_node *prev = NULL;
+	struct rb_node *next= NULL;
 	struct rb_node *ret;
 
-	ret = __etree_search(tree, offset, &prev, NULL, p_ret, parent_ret);
+	ret = __etree_search(tree, offset, &next, NULL, p_ret, parent_ret);
 	if (!ret)
-		return prev;
+		return next;
 	return ret;
 }
 
@@ -368,7 +447,7 @@ static void merge_state(struct extent_io_tree *tree,
 	struct extent_state *other;
 	struct rb_node *other_node;
 
-	if (state->state & (EXTENT_IOBITS | EXTENT_BOUNDARY))
+	if (state->state & (EXTENT_LOCKED | EXTENT_BOUNDARY))
 		return;
 
 	other_node = rb_prev(&state->rb_node);
@@ -579,15 +658,15 @@ int __clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 	int clear = 0;
 
 	btrfs_debug_check_extent_io_range(tree, start, end);
+	trace_btrfs_clear_extent_bit(tree, start, end - start + 1, bits);
 
 	if (bits & EXTENT_DELALLOC)
 		bits |= EXTENT_NORESERVE;
 
 	if (delete)
 		bits |= ~EXTENT_CTLBITS;
-	bits |= EXTENT_FIRST_DELALLOC;
 
-	if (bits & (EXTENT_IOBITS | EXTENT_BOUNDARY))
+	if (bits & (EXTENT_LOCKED | EXTENT_BOUNDARY))
 		clear = 1;
 again:
 	if (!prealloc && gfpflags_allow_blocking(mask)) {
@@ -819,7 +898,7 @@ static void cache_state(struct extent_state *state,
 			struct extent_state **cached_ptr)
 {
 	return cache_state_if_flags(state, cached_ptr,
-				    EXTENT_IOBITS | EXTENT_BOUNDARY);
+				    EXTENT_LOCKED | EXTENT_BOUNDARY);
 }
 
 /*
@@ -849,8 +928,8 @@ __set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 	u64 last_end;
 
 	btrfs_debug_check_extent_io_range(tree, start, end);
+	trace_btrfs_set_extent_bit(tree, start, end - start + 1, bits);
 
-	bits |= EXTENT_FIRST_DELALLOC;
 again:
 	if (!prealloc && gfpflags_allow_blocking(mask)) {
 		/*
@@ -1082,6 +1161,8 @@ int convert_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 	bool first_iteration = true;
 
 	btrfs_debug_check_extent_io_range(tree, start, end);
+	trace_btrfs_convert_extent_bit(tree, start, end - start + 1, bits,
+				       clear_bits);
 
 again:
 	if (!prealloc) {
@@ -1281,6 +1362,13 @@ int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
 				changeset);
 }
 
+int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
+			   unsigned bits)
+{
+	return __set_extent_bit(tree, start, end, bits, 0, NULL, NULL,
+				GFP_NOWAIT, NULL);
+}
+
 int clear_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 		     unsigned bits, int wake, int delete,
 		     struct extent_state **cached)
@@ -1448,6 +1536,79 @@ out:
 	return ret;
 }
 
+/**
+ * find_first_clear_extent_bit - finds the first range that has @bits not set
+ * and that starts after @start
+ *
+ * @tree - the tree to search
+ * @start - the offset at/after which the found extent should start
+ * @start_ret - records the beginning of the range
+ * @end_ret - records the end of the range (inclusive)
+ * @bits - the set of bits which must be unset
+ *
+ * Since unallocated range is also considered one which doesn't have the bits
+ * set it's possible that @end_ret contains -1, this happens in case the range
+ * spans (last_range_end, end of device]. In this case it's up to the caller to
+ * trim @end_ret to the appropriate size.
+ */
+void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
+				 u64 *start_ret, u64 *end_ret, unsigned bits)
+{
+	struct extent_state *state;
+	struct rb_node *node, *prev = NULL, *next;
+
+	spin_lock(&tree->lock);
+
+	/* Find first extent with bits cleared */
+	while (1) {
+		node = __etree_search(tree, start, &next, &prev, NULL, NULL);
+		if (!node) {
+			node = next;
+			if (!node) {
+				/*
+				 * We are past the last allocated chunk,
+				 * set start at the end of the last extent. The
+				 * device alloc tree should never be empty so
+				 * prev is always set.
+				 */
+				ASSERT(prev);
+				state = rb_entry(prev, struct extent_state, rb_node);
+				*start_ret = state->end + 1;
+				*end_ret = -1;
+				goto out;
+			}
+		}
+		state = rb_entry(node, struct extent_state, rb_node);
+		if (in_range(start, state->start, state->end - state->start + 1) &&
+			(state->state & bits)) {
+			start = state->end + 1;
+		} else {
+			*start_ret = start;
+			break;
+		}
+	}
+
+	/*
+	 * Find the longest stretch from start until an entry which has the
+	 * bits set
+	 */
+	while (1) {
+		state = rb_entry(node, struct extent_state, rb_node);
+		if (state->end >= start && !(state->state & bits)) {
+			*end_ret = state->end;
+		} else {
+			*end_ret = state->start - 1;
+			break;
+		}
+
+		node = rb_next(node);
+		if (!node)
+			break;
+	}
+out:
+	spin_unlock(&tree->lock);
+}
+
 /*
  * find a contiguous range of bytes in the file marked as delalloc, not
  * more than 'max_bytes'.  start and end are used to return the range,
@@ -2031,9 +2192,9 @@ int repair_io_failure(struct btrfs_fs_info *fs_info, u64 ino, u64 start,
 	return 0;
 }
 
-int repair_eb_io_failure(struct btrfs_fs_info *fs_info,
-			 struct extent_buffer *eb, int mirror_num)
+int btrfs_repair_eb_io_failure(struct extent_buffer *eb, int mirror_num)
 {
+	struct btrfs_fs_info *fs_info = eb->fs_info;
 	u64 start = eb->start;
 	int i, num_pages = num_extent_pages(eb);
 	int ret = 0;
@@ -2350,7 +2511,7 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset,
 	int read_mode = 0;
 	blk_status_t status;
 	int ret;
-	unsigned failed_bio_pages = bio_pages_all(failed_bio);
+	unsigned failed_bio_pages = failed_bio->bi_iter.bi_size >> PAGE_SHIFT;
 
 	BUG_ON(bio_op(failed_bio) == REQ_OP_WRITE);
 
@@ -2379,7 +2540,7 @@ static int bio_readpage_error(struct bio *failed_bio, u64 phy_offset,
 		read_mode, failrec->this_mirror, failrec->in_validation);
 
 	status = tree->ops->submit_bio_hook(tree->private_data, bio, failrec->this_mirror,
-					 failrec->bio_flags, 0);
+					 failrec->bio_flags);
 	if (status) {
 		free_io_failure(failure_tree, tree, failrec);
 		bio_put(bio);
@@ -2421,10 +2582,10 @@ static void end_bio_extent_writepage(struct bio *bio)
 	struct bio_vec *bvec;
 	u64 start;
 	u64 end;
-	int i;
+	struct bvec_iter_all iter_all;
 
 	ASSERT(!bio_flagged(bio, BIO_CLONED));
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 		struct page *page = bvec->bv_page;
 		struct inode *inode = page->mapping->host;
 		struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
@@ -2492,10 +2653,10 @@ static void end_bio_extent_readpage(struct bio *bio)
 	u64 extent_len = 0;
 	int mirror;
 	int ret;
-	int i;
+	struct bvec_iter_all iter_all;
 
 	ASSERT(!bio_flagged(bio, BIO_CLONED));
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 		struct page *page = bvec->bv_page;
 		struct inode *inode = page->mapping->host;
 		struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
@@ -2575,8 +2736,6 @@ static void end_bio_extent_readpage(struct bio *bio)
 			if (test_and_clear_bit(EXTENT_BUFFER_READAHEAD,
 					       &eb->bflags))
 				btree_readahead_hook(eb, -EIO);
-
-			ret = -EIO;
 		}
 readpage_ok:
 		if (likely(uptodate)) {
@@ -2692,28 +2851,6 @@ struct bio *btrfs_bio_clone_partial(struct bio *orig, int offset, int size)
 	return bio;
 }
 
-static int __must_check submit_one_bio(struct bio *bio, int mirror_num,
-				       unsigned long bio_flags)
-{
-	blk_status_t ret = 0;
-	struct bio_vec *bvec = bio_last_bvec_all(bio);
-	struct page *page = bvec->bv_page;
-	struct extent_io_tree *tree = bio->bi_private;
-	u64 start;
-
-	start = page_offset(page) + bvec->bv_offset;
-
-	bio->bi_private = NULL;
-
-	if (tree->ops)
-		ret = tree->ops->submit_bio_hook(tree->private_data, bio,
-					   mirror_num, bio_flags, start);
-	else
-		btrfsic_submit_bio(bio);
-
-	return blk_status_to_errno(ret);
-}
-
 /*
  * @opf:	bio REQ_OP_* and REQ_* flags as one value
  * @tree:	tree so we can call our merge_bio hook
@@ -2985,11 +3122,11 @@ static int __do_readpage(struct extent_io_tree *tree,
 		 */
 		if (test_bit(EXTENT_FLAG_COMPRESSED, &em->flags) &&
 		    prev_em_start && *prev_em_start != (u64)-1 &&
-		    *prev_em_start != em->orig_start)
+		    *prev_em_start != em->start)
 			force_bio_submit = true;
 
 		if (prev_em_start)
-			*prev_em_start = em->orig_start;
+			*prev_em_start = em->start;
 
 		free_extent_map(em);
 		em = NULL;
@@ -3059,7 +3196,7 @@ out:
 	return ret;
 }
 
-static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
+static inline void contiguous_readpages(struct extent_io_tree *tree,
 					     struct page *pages[], int nr_pages,
 					     u64 start, u64 end,
 					     struct extent_map **em_cached,
@@ -3090,46 +3227,6 @@ static inline void __do_contiguous_readpages(struct extent_io_tree *tree,
 	}
 }
 
-static void __extent_readpages(struct extent_io_tree *tree,
-			       struct page *pages[],
-			       int nr_pages,
-			       struct extent_map **em_cached,
-			       struct bio **bio, unsigned long *bio_flags,
-			       u64 *prev_em_start)
-{
-	u64 start = 0;
-	u64 end = 0;
-	u64 page_start;
-	int index;
-	int first_index = 0;
-
-	for (index = 0; index < nr_pages; index++) {
-		page_start = page_offset(pages[index]);
-		if (!end) {
-			start = page_start;
-			end = start + PAGE_SIZE - 1;
-			first_index = index;
-		} else if (end + 1 == page_start) {
-			end += PAGE_SIZE;
-		} else {
-			__do_contiguous_readpages(tree, &pages[first_index],
-						  index - first_index, start,
-						  end, em_cached,
-						  bio, bio_flags,
-						  prev_em_start);
-			start = page_start;
-			end = start + PAGE_SIZE - 1;
-			first_index = index;
-		}
-	}
-
-	if (end)
-		__do_contiguous_readpages(tree, &pages[first_index],
-					  index - first_index, start,
-					  end, em_cached, bio,
-					  bio_flags, prev_em_start);
-}
-
 static int __extent_read_full_page(struct extent_io_tree *tree,
 				   struct page *page,
 				   get_extent_t *get_extent,
@@ -3409,6 +3506,9 @@ done:
  * records are inserted to lock ranges in the tree, and as dirty areas
  * are found, they are marked writeback.  Then the lock bits are removed
  * and the end_io handler clears the writeback ranges
+ *
+ * Return 0 if everything goes well.
+ * Return <0 for error.
  */
 static int __extent_writepage(struct page *page, struct writeback_control *wbc,
 			      struct extent_page_data *epd)
@@ -3478,6 +3578,7 @@ done:
 		end_extent_writepage(page, ret, start, page_end);
 	}
 	unlock_page(page);
+	ASSERT(ret <= 0);
 	return ret;
 
 done_unlocked:
@@ -3490,18 +3591,26 @@ void wait_on_extent_buffer_writeback(struct extent_buffer *eb)
 		       TASK_UNINTERRUPTIBLE);
 }
 
-static noinline_for_stack int
-lock_extent_buffer_for_io(struct extent_buffer *eb,
-			  struct btrfs_fs_info *fs_info,
+/*
+ * Lock eb pages and flush the bio if we can't the locks
+ *
+ * Return  0 if nothing went wrong
+ * Return >0 is same as 0, except bio is not submitted
+ * Return <0 if something went wrong, no page is locked
+ */
+static noinline_for_stack int lock_extent_buffer_for_io(struct extent_buffer *eb,
 			  struct extent_page_data *epd)
 {
-	int i, num_pages;
+	struct btrfs_fs_info *fs_info = eb->fs_info;
+	int i, num_pages, failed_page_nr;
 	int flush = 0;
 	int ret = 0;
 
 	if (!btrfs_try_tree_write_lock(eb)) {
+		ret = flush_write_bio(epd);
+		if (ret < 0)
+			return ret;
 		flush = 1;
-		flush_write_bio(epd);
 		btrfs_tree_lock(eb);
 	}
 
@@ -3510,7 +3619,9 @@ lock_extent_buffer_for_io(struct extent_buffer *eb,
 		if (!epd->sync_io)
 			return 0;
 		if (!flush) {
-			flush_write_bio(epd);
+			ret = flush_write_bio(epd);
+			if (ret < 0)
+				return ret;
 			flush = 1;
 		}
 		while (1) {
@@ -3551,7 +3662,11 @@ lock_extent_buffer_for_io(struct extent_buffer *eb,
 
 		if (!trylock_page(p)) {
 			if (!flush) {
-				flush_write_bio(epd);
+				ret = flush_write_bio(epd);
+				if (ret < 0) {
+					failed_page_nr = i;
+					goto err_unlock;
+				}
 				flush = 1;
 			}
 			lock_page(p);
@@ -3559,6 +3674,11 @@ lock_extent_buffer_for_io(struct extent_buffer *eb,
 	}
 
 	return ret;
+err_unlock:
+	/* Unlock already locked pages */
+	for (i = 0; i < failed_page_nr; i++)
+		unlock_page(eb->pages[i]);
+	return ret;
 }
 
 static void end_extent_buffer_writeback(struct extent_buffer *eb)
@@ -3633,10 +3753,11 @@ static void end_bio_extent_buffer_writepage(struct bio *bio)
 {
 	struct bio_vec *bvec;
 	struct extent_buffer *eb;
-	int i, done;
+	int done;
+	struct bvec_iter_all iter_all;
 
 	ASSERT(!bio_flagged(bio, BIO_CLONED));
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 		struct page *page = bvec->bv_page;
 
 		eb = (struct extent_buffer *)page->private;
@@ -3661,10 +3782,10 @@ static void end_bio_extent_buffer_writepage(struct bio *bio)
 }
 
 static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
-			struct btrfs_fs_info *fs_info,
 			struct writeback_control *wbc,
 			struct extent_page_data *epd)
 {
+	struct btrfs_fs_info *fs_info = eb->fs_info;
 	struct block_device *bdev = fs_info->fs_devices->latest_bdev;
 	struct extent_io_tree *tree = &BTRFS_I(fs_info->btree_inode)->io_tree;
 	u64 offset = eb->start;
@@ -3690,7 +3811,7 @@ static noinline_for_stack int write_one_eb(struct extent_buffer *eb,
 		 * header 0 1 2 .. N ... data_N .. data_2 data_1 data_0
 		 */
 		start = btrfs_item_nr_offset(nritems);
-		end = BTRFS_LEAF_DATA_OFFSET + leaf_data_end(fs_info, eb);
+		end = BTRFS_LEAF_DATA_OFFSET + leaf_data_end(eb);
 		memzero_extent_buffer(eb, start, end - start);
 	}
 
@@ -3733,7 +3854,6 @@ int btree_write_cache_pages(struct address_space *mapping,
 				   struct writeback_control *wbc)
 {
 	struct extent_io_tree *tree = &BTRFS_I(mapping->host)->io_tree;
-	struct btrfs_fs_info *fs_info = BTRFS_I(mapping->host)->root->fs_info;
 	struct extent_buffer *eb, *prev_eb = NULL;
 	struct extent_page_data epd = {
 		.bio = NULL,
@@ -3808,13 +3928,13 @@ retry:
 				continue;
 
 			prev_eb = eb;
-			ret = lock_extent_buffer_for_io(eb, fs_info, &epd);
+			ret = lock_extent_buffer_for_io(eb, &epd);
 			if (!ret) {
 				free_extent_buffer(eb);
 				continue;
 			}
 
-			ret = write_one_eb(eb, fs_info, wbc, &epd);
+			ret = write_one_eb(eb, wbc, &epd);
 			if (ret) {
 				done = 1;
 				free_extent_buffer(eb);
@@ -3841,7 +3961,12 @@ retry:
 		index = 0;
 		goto retry;
 	}
-	flush_write_bio(&epd);
+	ASSERT(ret <= 0);
+	if (ret < 0) {
+		end_write_bio(&epd, ret);
+		return ret;
+	}
+	ret = flush_write_bio(&epd);
 	return ret;
 }
 
@@ -3938,7 +4063,8 @@ retry:
 			 * tmpfs file mapping
 			 */
 			if (!trylock_page(page)) {
-				flush_write_bio(epd);
+				ret = flush_write_bio(epd);
+				BUG_ON(ret < 0);
 				lock_page(page);
 			}
 
@@ -3948,8 +4074,10 @@ retry:
 			}
 
 			if (wbc->sync_mode != WB_SYNC_NONE) {
-				if (PageWriteback(page))
-					flush_write_bio(epd);
+				if (PageWriteback(page)) {
+					ret = flush_write_bio(epd);
+					BUG_ON(ret < 0);
+				}
 				wait_on_page_writeback(page);
 			}
 
@@ -3960,11 +4088,6 @@ retry:
 			}
 
 			ret = __extent_writepage(page, wbc, epd);
-
-			if (unlikely(ret == AOP_WRITEPAGE_ACTIVATE)) {
-				unlock_page(page);
-				ret = 0;
-			}
 			if (ret < 0) {
 				/*
 				 * done_index is set past this page,
@@ -4007,17 +4130,6 @@ retry:
 	return ret;
 }
 
-static void flush_write_bio(struct extent_page_data *epd)
-{
-	if (epd->bio) {
-		int ret;
-
-		ret = submit_one_bio(epd->bio, 0, 0);
-		BUG_ON(ret < 0); /* -ENOMEM */
-		epd->bio = NULL;
-	}
-}
-
 int extent_write_full_page(struct page *page, struct writeback_control *wbc)
 {
 	int ret;
@@ -4029,8 +4141,14 @@ int extent_write_full_page(struct page *page, struct writeback_control *wbc)
 	};
 
 	ret = __extent_writepage(page, wbc, &epd);
+	ASSERT(ret <= 0);
+	if (ret < 0) {
+		end_write_bio(&epd, ret);
+		return ret;
+	}
 
-	flush_write_bio(&epd);
+	ret = flush_write_bio(&epd);
+	ASSERT(ret <= 0);
 	return ret;
 }
 
@@ -4070,7 +4188,12 @@ int extent_write_locked_range(struct inode *inode, u64 start, u64 end,
 		start += PAGE_SIZE;
 	}
 
-	flush_write_bio(&epd);
+	ASSERT(ret <= 0);
+	if (ret < 0) {
+		end_write_bio(&epd, ret);
+		return ret;
+	}
+	ret = flush_write_bio(&epd);
 	return ret;
 }
 
@@ -4086,7 +4209,12 @@ int extent_writepages(struct address_space *mapping,
 	};
 
 	ret = extent_write_cache_pages(mapping, wbc, &epd);
-	flush_write_bio(&epd);
+	ASSERT(ret <= 0);
+	if (ret < 0) {
+		end_write_bio(&epd, ret);
+		return ret;
+	}
+	ret = flush_write_bio(&epd);
 	return ret;
 }
 
@@ -4102,6 +4230,8 @@ int extent_readpages(struct address_space *mapping, struct list_head *pages,
 	u64 prev_em_start = (u64)-1;
 
 	while (!list_empty(pages)) {
+		u64 contig_end = 0;
+
 		for (nr = 0; nr < ARRAY_SIZE(pagepool) && !list_empty(pages);) {
 			struct page *page = lru_to_page(pages);
 
@@ -4110,14 +4240,22 @@ int extent_readpages(struct address_space *mapping, struct list_head *pages,
 			if (add_to_page_cache_lru(page, mapping, page->index,
 						readahead_gfp_mask(mapping))) {
 				put_page(page);
-				continue;
+				break;
 			}
 
 			pagepool[nr++] = page;
+			contig_end = page_offset(page) + PAGE_SIZE - 1;
 		}
 
-		__extent_readpages(tree, pagepool, nr, &em_cached, &bio,
-				   &bio_flags, &prev_em_start);
+		if (nr) {
+			u64 contig_start = page_offset(pagepool[0]);
+
+			ASSERT(contig_start + nr * PAGE_SIZE - 1 == contig_end);
+
+			contiguous_readpages(tree, pagepool, nr, contig_start,
+				     contig_end, &em_cached, &bio, &bio_flags,
+				     &prev_em_start);
+		}
 	}
 
 	if (em_cached)
@@ -4166,10 +4304,9 @@ static int try_release_extent_state(struct extent_io_tree *tree,
 	u64 end = start + PAGE_SIZE - 1;
 	int ret = 1;
 
-	if (test_range_bit(tree, start, end,
-			   EXTENT_IOBITS, 0, NULL))
+	if (test_range_bit(tree, start, end, EXTENT_LOCKED, 0, NULL)) {
 		ret = 0;
-	else {
+	} else {
 		/*
 		 * at this point we can safely clear everything except the
 		 * locked bit and the nodatasum bit
@@ -4222,8 +4359,7 @@ int try_release_extent_mapping(struct page *page, gfp_t mask)
 			}
 			if (!test_range_bit(tree, em->start,
 					    extent_map_end(em) - 1,
-					    EXTENT_LOCKED | EXTENT_WRITEBACK,
-					    0, NULL)) {
+					    EXTENT_LOCKED, 0, NULL)) {
 				set_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
 					&btrfs_inode->runtime_flags);
 				remove_extent_mapping(map, em);
@@ -4259,8 +4395,7 @@ static struct extent_map *get_extent_skip_holes(struct inode *inode,
 		if (len == 0)
 			break;
 		len = ALIGN(len, sectorsize);
-		em = btrfs_get_extent_fiemap(BTRFS_I(inode), NULL, 0, offset,
-				len, 0);
+		em = btrfs_get_extent_fiemap(BTRFS_I(inode), offset, len);
 		if (IS_ERR_OR_NULL(em))
 			return em;
 
@@ -4373,8 +4508,7 @@ try_submit_last:
  * In this case, the first extent range will be cached but not emitted.
  * So we must emit it before ending extent_fiemap().
  */
-static int emit_last_fiemap_cache(struct btrfs_fs_info *fs_info,
-				  struct fiemap_extent_info *fieinfo,
+static int emit_last_fiemap_cache(struct fiemap_extent_info *fieinfo,
 				  struct fiemap_cache *cache)
 {
 	int ret;
@@ -4581,7 +4715,7 @@ int extent_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 	}
 out_free:
 	if (!ret)
-		ret = emit_last_fiemap_cache(root->fs_info, fieinfo, &cache);
+		ret = emit_last_fiemap_cache(fieinfo, &cache);
 	free_extent_map(em);
 out:
 	btrfs_free_path(path);
@@ -4673,13 +4807,9 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start,
 	eb->fs_info = fs_info;
 	eb->bflags = 0;
 	rwlock_init(&eb->lock);
-	atomic_set(&eb->write_locks, 0);
-	atomic_set(&eb->read_locks, 0);
 	atomic_set(&eb->blocking_readers, 0);
 	atomic_set(&eb->blocking_writers, 0);
-	atomic_set(&eb->spinning_readers, 0);
-	atomic_set(&eb->spinning_writers, 0);
-	eb->lock_nested = 0;
+	eb->lock_nested = false;
 	init_waitqueue_head(&eb->write_lock_wq);
 	init_waitqueue_head(&eb->read_lock_wq);
 
@@ -4696,6 +4826,13 @@ __alloc_extent_buffer(struct btrfs_fs_info *fs_info, u64 start,
 		> MAX_INLINE_EXTENT_BUFFER_SIZE);
 	BUG_ON(len > MAX_INLINE_EXTENT_BUFFER_SIZE);
 
+#ifdef CONFIG_BTRFS_DEBUG
+	atomic_set(&eb->spinning_writers, 0);
+	atomic_set(&eb->spinning_readers, 0);
+	atomic_set(&eb->read_locks, 0);
+	atomic_set(&eb->write_locks, 0);
+#endif
+
 	return eb;
 }
 
@@ -5184,8 +5321,7 @@ void set_extent_buffer_uptodate(struct extent_buffer *eb)
 	}
 }
 
-int read_extent_buffer_pages(struct extent_io_tree *tree,
-			     struct extent_buffer *eb, int wait, int mirror_num)
+int read_extent_buffer_pages(struct extent_buffer *eb, int wait, int mirror_num)
 {
 	int i;
 	struct page *page;
@@ -5197,6 +5333,7 @@ int read_extent_buffer_pages(struct extent_io_tree *tree,
 	unsigned long num_reads = 0;
 	struct bio *bio = NULL;
 	unsigned long bio_flags = 0;
+	struct extent_io_tree *tree = &BTRFS_I(eb->fs_info->btree_inode)->io_tree;
 
 	if (test_bit(EXTENT_BUFFER_UPTODATE, &eb->bflags))
 		return 0;
@@ -5747,13 +5884,13 @@ void memcpy_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
 		btrfs_err(fs_info,
 			"memmove bogus src_offset %lu move len %lu dst len %lu",
 			 src_offset, len, dst->len);
-		BUG_ON(1);
+		BUG();
 	}
 	if (dst_offset + len > dst->len) {
 		btrfs_err(fs_info,
 			"memmove bogus dst_offset %lu move len %lu dst len %lu",
 			 dst_offset, len, dst->len);
-		BUG_ON(1);
+		BUG();
 	}
 
 	while (len > 0) {
@@ -5794,13 +5931,13 @@ void memmove_extent_buffer(struct extent_buffer *dst, unsigned long dst_offset,
 		btrfs_err(fs_info,
 			  "memmove bogus src_offset %lu move len %lu len %lu",
 			  src_offset, len, dst->len);
-		BUG_ON(1);
+		BUG();
 	}
 	if (dst_offset + len > dst->len) {
 		btrfs_err(fs_info,
 			  "memmove bogus dst_offset %lu move len %lu len %lu",
 			  dst_offset, len, dst->len);
-		BUG_ON(1);
+		BUG();
 	}
 	if (dst_offset < src_offset) {
 		memcpy_extent_buffer(dst, dst_offset, src_offset, len);
diff --git a/fs/btrfs/extent_io.h b/fs/btrfs/extent_io.h
index 9673be3f3d1f..aa18a16a6ed7 100644
--- a/fs/btrfs/extent_io.h
+++ b/fs/btrfs/extent_io.h
@@ -9,26 +9,32 @@
 
 /* bits for the extent state */
 #define EXTENT_DIRTY		(1U << 0)
-#define EXTENT_WRITEBACK	(1U << 1)
-#define EXTENT_UPTODATE		(1U << 2)
-#define EXTENT_LOCKED		(1U << 3)
-#define EXTENT_NEW		(1U << 4)
-#define EXTENT_DELALLOC		(1U << 5)
-#define EXTENT_DEFRAG		(1U << 6)
-#define EXTENT_BOUNDARY		(1U << 9)
-#define EXTENT_NODATASUM	(1U << 10)
-#define EXTENT_CLEAR_META_RESV	(1U << 11)
-#define EXTENT_FIRST_DELALLOC	(1U << 12)
-#define EXTENT_NEED_WAIT	(1U << 13)
-#define EXTENT_DAMAGED		(1U << 14)
-#define EXTENT_NORESERVE	(1U << 15)
-#define EXTENT_QGROUP_RESERVED	(1U << 16)
-#define EXTENT_CLEAR_DATA_RESV	(1U << 17)
-#define EXTENT_DELALLOC_NEW	(1U << 18)
-#define EXTENT_IOBITS		(EXTENT_LOCKED | EXTENT_WRITEBACK)
+#define EXTENT_UPTODATE		(1U << 1)
+#define EXTENT_LOCKED		(1U << 2)
+#define EXTENT_NEW		(1U << 3)
+#define EXTENT_DELALLOC		(1U << 4)
+#define EXTENT_DEFRAG		(1U << 5)
+#define EXTENT_BOUNDARY		(1U << 6)
+#define EXTENT_NODATASUM	(1U << 7)
+#define EXTENT_CLEAR_META_RESV	(1U << 8)
+#define EXTENT_NEED_WAIT	(1U << 9)
+#define EXTENT_DAMAGED		(1U << 10)
+#define EXTENT_NORESERVE	(1U << 11)
+#define EXTENT_QGROUP_RESERVED	(1U << 12)
+#define EXTENT_CLEAR_DATA_RESV	(1U << 13)
+#define EXTENT_DELALLOC_NEW	(1U << 14)
 #define EXTENT_DO_ACCOUNTING    (EXTENT_CLEAR_META_RESV | \
 				 EXTENT_CLEAR_DATA_RESV)
-#define EXTENT_CTLBITS		(EXTENT_DO_ACCOUNTING | EXTENT_FIRST_DELALLOC)
+#define EXTENT_CTLBITS		(EXTENT_DO_ACCOUNTING)
+
+/*
+ * Redefined bits above which are used only in the device allocation tree,
+ * shouldn't be using EXTENT_LOCKED / EXTENT_BOUNDARY / EXTENT_CLEAR_META_RESV
+ * / EXTENT_CLEAR_DATA_RESV because they have special meaning to the bit
+ * manipulation functions
+ */
+#define CHUNK_ALLOCATED EXTENT_DIRTY
+#define CHUNK_TRIMMED   EXTENT_DEFRAG
 
 /*
  * flags for bio submission. The high bits indicate the compression
@@ -89,9 +95,6 @@ struct btrfs_inode;
 struct btrfs_io_bio;
 struct io_failure_record;
 
-typedef	blk_status_t (extent_submit_bio_hook_t)(void *private_data, struct bio *bio,
-				       int mirror_num, unsigned long bio_flags,
-				       u64 bio_offset);
 
 typedef blk_status_t (extent_submit_bio_start_t)(void *private_data,
 		struct bio *bio, u64 bio_offset);
@@ -101,17 +104,34 @@ struct extent_io_ops {
 	 * The following callbacks must be always defined, the function
 	 * pointer will be called unconditionally.
 	 */
-	extent_submit_bio_hook_t *submit_bio_hook;
+	blk_status_t (*submit_bio_hook)(struct inode *inode, struct bio *bio,
+					int mirror_num, unsigned long bio_flags);
 	int (*readpage_end_io_hook)(struct btrfs_io_bio *io_bio, u64 phy_offset,
 				    struct page *page, u64 start, u64 end,
 				    int mirror);
 };
 
+enum {
+	IO_TREE_FS_INFO_FREED_EXTENTS0,
+	IO_TREE_FS_INFO_FREED_EXTENTS1,
+	IO_TREE_INODE_IO,
+	IO_TREE_INODE_IO_FAILURE,
+	IO_TREE_RELOC_BLOCKS,
+	IO_TREE_TRANS_DIRTY_PAGES,
+	IO_TREE_ROOT_DIRTY_LOG_PAGES,
+	IO_TREE_SELFTEST,
+};
+
 struct extent_io_tree {
 	struct rb_root state;
+	struct btrfs_fs_info *fs_info;
 	void *private_data;
 	u64 dirty_bytes;
-	int track_uptodate;
+	bool track_uptodate;
+
+	/* Who owns this io tree, should be one of IO_TREE_* */
+	u8 owner;
+
 	spinlock_t lock;
 	const struct extent_io_ops *ops;
 };
@@ -147,14 +167,9 @@ struct extent_buffer {
 	struct rcu_head rcu_head;
 	pid_t lock_owner;
 
-	/* count of read lock holders on the extent buffer */
-	atomic_t write_locks;
-	atomic_t read_locks;
 	atomic_t blocking_writers;
 	atomic_t blocking_readers;
-	atomic_t spinning_readers;
-	atomic_t spinning_writers;
-	short lock_nested;
+	bool lock_nested;
 	/* >= 0 if eb belongs to a log tree, -1 otherwise */
 	short log_index;
 
@@ -172,6 +187,10 @@ struct extent_buffer {
 	wait_queue_head_t read_lock_wq;
 	struct page *pages[INLINE_EXTENT_BUFFER_PAGES];
 #ifdef CONFIG_BTRFS_DEBUG
+	atomic_t spinning_writers;
+	atomic_t spinning_readers;
+	atomic_t read_locks;
+	atomic_t write_locks;
 	struct list_head leak_list;
 #endif
 };
@@ -240,7 +259,10 @@ typedef struct extent_map *(get_extent_t)(struct btrfs_inode *inode,
 					  u64 start, u64 len,
 					  int create);
 
-void extent_io_tree_init(struct extent_io_tree *tree, void *private_data);
+void extent_io_tree_init(struct btrfs_fs_info *fs_info,
+			 struct extent_io_tree *tree, unsigned int owner,
+			 void *private_data);
+void extent_io_tree_release(struct extent_io_tree *tree);
 int try_release_extent_mapping(struct page *page, gfp_t mask);
 int try_release_extent_buffer(struct page *page);
 int lock_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
@@ -310,6 +332,8 @@ int set_record_extent_bits(struct extent_io_tree *tree, u64 start, u64 end,
 int set_extent_bit(struct extent_io_tree *tree, u64 start, u64 end,
 		   unsigned bits, u64 *failed_start,
 		   struct extent_state **cached_state, gfp_t mask);
+int set_extent_bits_nowait(struct extent_io_tree *tree, u64 start, u64 end,
+			   unsigned bits);
 
 static inline int set_extent_bits(struct extent_io_tree *tree, u64 start,
 		u64 end, unsigned bits)
@@ -377,6 +401,8 @@ static inline int set_extent_uptodate(struct extent_io_tree *tree, u64 start,
 int find_first_extent_bit(struct extent_io_tree *tree, u64 start,
 			  u64 *start_ret, u64 *end_ret, unsigned bits,
 			  struct extent_state **cached_state);
+void find_first_clear_extent_bit(struct extent_io_tree *tree, u64 start,
+				 u64 *start_ret, u64 *end_ret, unsigned bits);
 int extent_invalidatepage(struct extent_io_tree *tree,
 			  struct page *page, unsigned long offset);
 int extent_write_full_page(struct page *page, struct writeback_control *wbc);
@@ -406,8 +432,7 @@ void free_extent_buffer_stale(struct extent_buffer *eb);
 #define WAIT_NONE	0
 #define WAIT_COMPLETE	1
 #define WAIT_PAGE_LOCK	2
-int read_extent_buffer_pages(struct extent_io_tree *tree,
-			     struct extent_buffer *eb, int wait,
+int read_extent_buffer_pages(struct extent_buffer *eb, int wait,
 			     int mirror_num);
 void wait_on_extent_buffer_writeback(struct extent_buffer *eb);
 
@@ -488,8 +513,7 @@ int clean_io_failure(struct btrfs_fs_info *fs_info,
 		     struct extent_io_tree *io_tree, u64 start,
 		     struct page *page, u64 ino, unsigned int pg_offset);
 void end_extent_writepage(struct page *page, int err, u64 start, u64 end);
-int repair_eb_io_failure(struct btrfs_fs_info *fs_info,
-			 struct extent_buffer *eb, int mirror_num);
+int btrfs_repair_eb_io_failure(struct extent_buffer *eb, int mirror_num);
 
 /*
  * When IO fails, either with EIO or csum verification fails, we
diff --git a/fs/btrfs/extent_map.c b/fs/btrfs/extent_map.c
index a042a193c120..9558d79faf1e 100644
--- a/fs/btrfs/extent_map.c
+++ b/fs/btrfs/extent_map.c
@@ -4,6 +4,7 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include "ctree.h"
+#include "volumes.h"
 #include "extent_map.h"
 #include "compression.h"
 
@@ -210,6 +211,9 @@ static int mergable_maps(struct extent_map *prev, struct extent_map *next)
 	if (!list_empty(&prev->list) || !list_empty(&next->list))
 		return 0;
 
+	ASSERT(next->block_start != EXTENT_MAP_DELALLOC &&
+	       prev->block_start != EXTENT_MAP_DELALLOC);
+
 	if (extent_map_end(prev) == next->start &&
 	    prev->flags == next->flags &&
 	    prev->bdev == next->bdev &&
@@ -217,8 +221,6 @@ static int mergable_maps(struct extent_map *prev, struct extent_map *next)
 	      prev->block_start == EXTENT_MAP_HOLE) ||
 	     (next->block_start == EXTENT_MAP_INLINE &&
 	      prev->block_start == EXTENT_MAP_INLINE) ||
-	     (next->block_start == EXTENT_MAP_DELALLOC &&
-	      prev->block_start == EXTENT_MAP_DELALLOC) ||
 	     (next->block_start < EXTENT_MAP_LAST_BYTE - 1 &&
 	      next->block_start == extent_map_block_end(prev)))) {
 		return 1;
@@ -336,6 +338,37 @@ static inline void setup_extent_mapping(struct extent_map_tree *tree,
 		try_merge_map(tree, em);
 }
 
+static void extent_map_device_set_bits(struct extent_map *em, unsigned bits)
+{
+	struct map_lookup *map = em->map_lookup;
+	u64 stripe_size = em->orig_block_len;
+	int i;
+
+	for (i = 0; i < map->num_stripes; i++) {
+		struct btrfs_bio_stripe *stripe = &map->stripes[i];
+		struct btrfs_device *device = stripe->dev;
+
+		set_extent_bits_nowait(&device->alloc_state, stripe->physical,
+				 stripe->physical + stripe_size - 1, bits);
+	}
+}
+
+static void extent_map_device_clear_bits(struct extent_map *em, unsigned bits)
+{
+	struct map_lookup *map = em->map_lookup;
+	u64 stripe_size = em->orig_block_len;
+	int i;
+
+	for (i = 0; i < map->num_stripes; i++) {
+		struct btrfs_bio_stripe *stripe = &map->stripes[i];
+		struct btrfs_device *device = stripe->dev;
+
+		__clear_extent_bit(&device->alloc_state, stripe->physical,
+				   stripe->physical + stripe_size - 1, bits,
+				   0, 0, NULL, GFP_NOWAIT, NULL);
+	}
+}
+
 /**
  * add_extent_mapping - add new extent map to the extent tree
  * @tree:	tree to insert new map in
@@ -356,6 +389,10 @@ int add_extent_mapping(struct extent_map_tree *tree,
 		goto out;
 
 	setup_extent_mapping(tree, em, modified);
+	if (test_bit(EXTENT_FLAG_FS_MAPPING, &em->flags)) {
+		extent_map_device_set_bits(em, CHUNK_ALLOCATED);
+		extent_map_device_clear_bits(em, CHUNK_TRIMMED);
+	}
 out:
 	return ret;
 }
@@ -437,6 +474,8 @@ void remove_extent_mapping(struct extent_map_tree *tree, struct extent_map *em)
 	rb_erase_cached(&em->rb_node, &tree->map);
 	if (!test_bit(EXTENT_FLAG_LOGGING, &em->flags))
 		list_del_init(&em->list);
+	if (test_bit(EXTENT_FLAG_FS_MAPPING, &em->flags))
+		extent_map_device_clear_bits(em, CHUNK_ALLOCATED);
 	RB_CLEAR_NODE(&em->rb_node);
 }
 
diff --git a/fs/btrfs/extent_map.h b/fs/btrfs/extent_map.h
index ef05a0121652..473f039fcd7c 100644
--- a/fs/btrfs/extent_map.h
+++ b/fs/btrfs/extent_map.h
@@ -9,6 +9,7 @@
 #define EXTENT_MAP_LAST_BYTE ((u64)-4)
 #define EXTENT_MAP_HOLE ((u64)-3)
 #define EXTENT_MAP_INLINE ((u64)-2)
+/* used only during fiemap calls */
 #define EXTENT_MAP_DELALLOC ((u64)-1)
 
 /* bits for the extent_map::flags field */
diff --git a/fs/btrfs/file-item.c b/fs/btrfs/file-item.c
index 920bf3b4b0ef..d431ea8198e4 100644
--- a/fs/btrfs/file-item.c
+++ b/fs/btrfs/file-item.c
@@ -7,6 +7,7 @@
 #include <linux/slab.h>
 #include <linux/pagemap.h>
 #include <linux/highmem.h>
+#include <linux/sched/mm.h>
 #include "ctree.h"
 #include "disk-io.h"
 #include "transaction.h"
@@ -412,6 +413,16 @@ fail:
 	return ret;
 }
 
+/*
+ * btrfs_csum_one_bio - Calculates checksums of the data contained inside a bio
+ * @inode:	 Owner of the data inside the bio
+ * @bio:	 Contains the data to be checksummed
+ * @file_start:  offset in file this bio begins to describe
+ * @contig:	 Boolean. If true/1 means all bio vecs in this bio are
+ *		 contiguous and they begin at @file_start in the file. False/0
+ *		 means this bio can contains potentially discontigous bio vecs
+ *		 so the logical offset of each should be calculated separately.
+ */
 blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
 		       u64 file_start, int contig)
 {
@@ -427,9 +438,13 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
 	unsigned long this_sum_bytes = 0;
 	int i;
 	u64 offset;
+	unsigned nofs_flag;
+
+	nofs_flag = memalloc_nofs_save();
+	sums = kvzalloc(btrfs_ordered_sum_size(fs_info, bio->bi_iter.bi_size),
+		       GFP_KERNEL);
+	memalloc_nofs_restore(nofs_flag);
 
-	sums = kzalloc(btrfs_ordered_sum_size(fs_info, bio->bi_iter.bi_size),
-		       GFP_NOFS);
 	if (!sums)
 		return BLK_STS_RESOURCE;
 
@@ -453,8 +468,6 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
 			BUG_ON(!ordered); /* Logic error */
 		}
 
-		data = kmap_atomic(bvec.bv_page);
-
 		nr_sectors = BTRFS_BYTES_TO_BLKS(fs_info,
 						 bvec.bv_len + fs_info->sectorsize
 						 - 1);
@@ -464,16 +477,17 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
 				offset < ordered->file_offset) {
 				unsigned long bytes_left;
 
-				kunmap_atomic(data);
 				sums->len = this_sum_bytes;
 				this_sum_bytes = 0;
-				btrfs_add_ordered_sum(inode, ordered, sums);
+				btrfs_add_ordered_sum(ordered, sums);
 				btrfs_put_ordered_extent(ordered);
 
 				bytes_left = bio->bi_iter.bi_size - total_bytes;
 
-				sums = kzalloc(btrfs_ordered_sum_size(fs_info, bytes_left),
-					       GFP_NOFS);
+				nofs_flag = memalloc_nofs_save();
+				sums = kvzalloc(btrfs_ordered_sum_size(fs_info,
+						      bytes_left), GFP_KERNEL);
+				memalloc_nofs_restore(nofs_flag);
 				BUG_ON(!sums); /* -ENOMEM */
 				sums->len = bytes_left;
 				ordered = btrfs_lookup_ordered_extent(inode,
@@ -482,16 +496,16 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
 				sums->bytenr = ((u64)bio->bi_iter.bi_sector << 9)
 					+ total_bytes;
 				index = 0;
-
-				data = kmap_atomic(bvec.bv_page);
 			}
 
 			sums->sums[index] = ~(u32)0;
+			data = kmap_atomic(bvec.bv_page);
 			sums->sums[index]
 				= btrfs_csum_data(data + bvec.bv_offset
 						+ (i * fs_info->sectorsize),
 						sums->sums[index],
 						fs_info->sectorsize);
+			kunmap_atomic(data);
 			btrfs_csum_final(sums->sums[index],
 					(char *)(sums->sums + index));
 			index++;
@@ -500,10 +514,9 @@ blk_status_t btrfs_csum_one_bio(struct inode *inode, struct bio *bio,
 			total_bytes += fs_info->sectorsize;
 		}
 
-		kunmap_atomic(data);
 	}
 	this_sum_bytes = 0;
-	btrfs_add_ordered_sum(inode, ordered, sums);
+	btrfs_add_ordered_sum(ordered, sums);
 	btrfs_put_ordered_extent(ordered);
 	return 0;
 }
@@ -544,7 +557,7 @@ static noinline void truncate_one_csum(struct btrfs_fs_info *fs_info,
 		 */
 		u32 new_size = (bytenr - key->offset) >> blocksize_bits;
 		new_size *= csum_size;
-		btrfs_truncate_item(fs_info, path, new_size, 1);
+		btrfs_truncate_item(path, new_size, 1);
 	} else if (key->offset >= bytenr && csum_end > end_byte &&
 		   end_byte > key->offset) {
 		/*
@@ -556,7 +569,7 @@ static noinline void truncate_one_csum(struct btrfs_fs_info *fs_info,
 		u32 new_size = (csum_end - end_byte) >> blocksize_bits;
 		new_size *= csum_size;
 
-		btrfs_truncate_item(fs_info, path, new_size, 0);
+		btrfs_truncate_item(path, new_size, 0);
 
 		key->offset = end_byte;
 		btrfs_set_item_key_safe(fs_info, path, key);
@@ -825,11 +838,11 @@ again:
 		u32 diff;
 		u32 free_space;
 
-		if (btrfs_leaf_free_space(fs_info, leaf) <
+		if (btrfs_leaf_free_space(leaf) <
 				 sizeof(struct btrfs_item) + csum_size * 2)
 			goto insert;
 
-		free_space = btrfs_leaf_free_space(fs_info, leaf) -
+		free_space = btrfs_leaf_free_space(leaf) -
 					 sizeof(struct btrfs_item) - csum_size;
 		tmp = sums->len - total_bytes;
 		tmp >>= fs_info->sb->s_blocksize_bits;
@@ -845,7 +858,7 @@ again:
 		diff /= csum_size;
 		diff *= csum_size;
 
-		btrfs_extend_item(fs_info, path, diff);
+		btrfs_extend_item(path, diff);
 		ret = 0;
 		goto csum;
 	}
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index d38dc8c31533..89f5be2bfb43 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -754,6 +754,7 @@ int __btrfs_drop_extents(struct btrfs_trans_handle *trans,
 	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct extent_buffer *leaf;
 	struct btrfs_file_extent_item *fi;
+	struct btrfs_ref ref = { 0 };
 	struct btrfs_key key;
 	struct btrfs_key new_key;
 	u64 ino = btrfs_ino(BTRFS_I(inode));
@@ -909,11 +910,14 @@ next_slot:
 			btrfs_mark_buffer_dirty(leaf);
 
 			if (update_refs && disk_bytenr > 0) {
-				ret = btrfs_inc_extent_ref(trans, root,
-						disk_bytenr, num_bytes, 0,
+				btrfs_init_generic_ref(&ref,
+						BTRFS_ADD_DELAYED_REF,
+						disk_bytenr, num_bytes, 0);
+				btrfs_init_data_ref(&ref,
 						root->root_key.objectid,
 						new_key.objectid,
 						start - extent_offset);
+				ret = btrfs_inc_extent_ref(trans, &ref);
 				BUG_ON(ret); /* -ENOMEM */
 			}
 			key.offset = start;
@@ -993,11 +997,14 @@ delete_extent_item:
 				extent_end = ALIGN(extent_end,
 						   fs_info->sectorsize);
 			} else if (update_refs && disk_bytenr > 0) {
-				ret = btrfs_free_extent(trans, root,
-						disk_bytenr, num_bytes, 0,
+				btrfs_init_generic_ref(&ref,
+						BTRFS_DROP_DELAYED_REF,
+						disk_bytenr, num_bytes, 0);
+				btrfs_init_data_ref(&ref,
 						root->root_key.objectid,
-						key.objectid, key.offset -
-						extent_offset);
+						key.objectid,
+						key.offset - extent_offset);
+				ret = btrfs_free_extent(trans, &ref);
 				BUG_ON(ret); /* -ENOMEM */
 				inode_sub_bytes(inode,
 						extent_end - key.offset);
@@ -1025,7 +1032,7 @@ delete_extent_item:
 			continue;
 		}
 
-		BUG_ON(1);
+		BUG();
 	}
 
 	if (!ret && del_nr > 0) {
@@ -1050,7 +1057,7 @@ delete_extent_item:
 	if (!ret && replace_extent && leafs_visited == 1 &&
 	    (path->locks[0] == BTRFS_WRITE_LOCK_BLOCKING ||
 	     path->locks[0] == BTRFS_WRITE_LOCK) &&
-	    btrfs_leaf_free_space(fs_info, leaf) >=
+	    btrfs_leaf_free_space(leaf) >=
 	    sizeof(struct btrfs_item) + extent_item_size) {
 
 		key.objectid = ino;
@@ -1142,6 +1149,7 @@ int btrfs_mark_extent_written(struct btrfs_trans_handle *trans,
 	struct extent_buffer *leaf;
 	struct btrfs_path *path;
 	struct btrfs_file_extent_item *fi;
+	struct btrfs_ref ref = { 0 };
 	struct btrfs_key key;
 	struct btrfs_key new_key;
 	u64 bytenr;
@@ -1287,9 +1295,11 @@ again:
 						extent_end - split);
 		btrfs_mark_buffer_dirty(leaf);
 
-		ret = btrfs_inc_extent_ref(trans, root, bytenr, num_bytes,
-					   0, root->root_key.objectid,
-					   ino, orig_offset);
+		btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, bytenr,
+				       num_bytes, 0);
+		btrfs_init_data_ref(&ref, root->root_key.objectid, ino,
+				    orig_offset);
+		ret = btrfs_inc_extent_ref(trans, &ref);
 		if (ret) {
 			btrfs_abort_transaction(trans, ret);
 			goto out;
@@ -1311,6 +1321,9 @@ again:
 
 	other_start = end;
 	other_end = 0;
+	btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF, bytenr,
+			       num_bytes, 0);
+	btrfs_init_data_ref(&ref, root->root_key.objectid, ino, orig_offset);
 	if (extent_mergeable(leaf, path->slots[0] + 1,
 			     ino, bytenr, orig_offset,
 			     &other_start, &other_end)) {
@@ -1321,9 +1334,7 @@ again:
 		extent_end = other_end;
 		del_slot = path->slots[0] + 1;
 		del_nr++;
-		ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
-					0, root->root_key.objectid,
-					ino, orig_offset);
+		ret = btrfs_free_extent(trans, &ref);
 		if (ret) {
 			btrfs_abort_transaction(trans, ret);
 			goto out;
@@ -1341,9 +1352,7 @@ again:
 		key.offset = other_start;
 		del_slot = path->slots[0];
 		del_nr++;
-		ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
-					0, root->root_key.objectid,
-					ino, orig_offset);
+		ret = btrfs_free_extent(trans, &ref);
 		if (ret) {
 			btrfs_abort_transaction(trans, ret);
 			goto out;
@@ -2059,6 +2068,18 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 	u64 len;
 
 	/*
+	 * If the inode needs a full sync, make sure we use a full range to
+	 * avoid log tree corruption, due to hole detection racing with ordered
+	 * extent completion for adjacent ranges, and assertion failures during
+	 * hole detection.
+	 */
+	if (test_bit(BTRFS_INODE_NEEDS_FULL_SYNC,
+		     &BTRFS_I(inode)->runtime_flags)) {
+		start = 0;
+		end = LLONG_MAX;
+	}
+
+	/*
 	 * The range length can be represented by u64, we have to do the typecasts
 	 * to avoid signed overflow if it's [0, LLONG_MAX] eg. from fsync()
 	 */
@@ -2165,7 +2186,6 @@ int btrfs_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
 		inode_unlock(inode);
 		goto out;
 	}
-	trans->sync = true;
 
 	ret = btrfs_log_dentry_safe(trans, dentry, start, end, &ctx);
 	if (ret < 0) {
@@ -2546,10 +2566,8 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
 
 	ret = btrfs_punch_hole_lock_range(inode, lockstart, lockend,
 					  &cached_state);
-	if (ret) {
-		inode_unlock(inode);
+	if (ret)
 		goto out_only_mutex;
-	}
 
 	path = btrfs_alloc_path();
 	if (!path) {
@@ -3132,6 +3150,7 @@ static long btrfs_fallocate(struct file *file, int mode,
 			ret = btrfs_qgroup_reserve_data(inode, &data_reserved,
 					cur_offset, last_byte - cur_offset);
 			if (ret < 0) {
+				cur_offset = last_byte;
 				free_extent_map(em);
 				break;
 			}
@@ -3181,7 +3200,7 @@ out:
 	/* Let go of our reservation. */
 	if (ret != 0 && !(mode & FALLOC_FL_ZERO_RANGE))
 		btrfs_free_reserved_data_space(inode, data_reserved,
-				alloc_start, alloc_end - cur_offset);
+				cur_offset, alloc_end - cur_offset);
 	extent_changeset_free(data_reserved);
 	return ret;
 }
@@ -3218,8 +3237,7 @@ static int find_desired_extent(struct inode *inode, loff_t *offset, int whence)
 			 &cached_state);
 
 	while (start < inode->i_size) {
-		em = btrfs_get_extent_fiemap(BTRFS_I(inode), NULL, 0,
-				start, len, 0);
+		em = btrfs_get_extent_fiemap(BTRFS_I(inode), start, len);
 		if (IS_ERR(em)) {
 			ret = PTR_ERR(em);
 			em = NULL;
diff --git a/fs/btrfs/free-space-cache.c b/fs/btrfs/free-space-cache.c
index 74aa552f4793..f74dc259307b 100644
--- a/fs/btrfs/free-space-cache.c
+++ b/fs/btrfs/free-space-cache.c
@@ -88,10 +88,11 @@ static struct inode *__lookup_free_space_inode(struct btrfs_root *root,
 	return inode;
 }
 
-struct inode *lookup_free_space_inode(struct btrfs_fs_info *fs_info,
-				      struct btrfs_block_group_cache
-				      *block_group, struct btrfs_path *path)
+struct inode *lookup_free_space_inode(
+		struct btrfs_block_group_cache *block_group,
+		struct btrfs_path *path)
 {
+	struct btrfs_fs_info *fs_info = block_group->fs_info;
 	struct inode *inode = NULL;
 	u32 flags = BTRFS_INODE_NODATASUM | BTRFS_INODE_NODATACOW;
 
@@ -185,20 +186,19 @@ static int __create_free_space_inode(struct btrfs_root *root,
 	return 0;
 }
 
-int create_free_space_inode(struct btrfs_fs_info *fs_info,
-			    struct btrfs_trans_handle *trans,
+int create_free_space_inode(struct btrfs_trans_handle *trans,
 			    struct btrfs_block_group_cache *block_group,
 			    struct btrfs_path *path)
 {
 	int ret;
 	u64 ino;
 
-	ret = btrfs_find_free_objectid(fs_info->tree_root, &ino);
+	ret = btrfs_find_free_objectid(trans->fs_info->tree_root, &ino);
 	if (ret < 0)
 		return ret;
 
-	return __create_free_space_inode(fs_info->tree_root, trans, path, ino,
-					 block_group->key.objectid);
+	return __create_free_space_inode(trans->fs_info->tree_root, trans, path,
+					 ino, block_group->key.objectid);
 }
 
 int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
@@ -812,9 +812,9 @@ free_cache:
 	goto out;
 }
 
-int load_free_space_cache(struct btrfs_fs_info *fs_info,
-			  struct btrfs_block_group_cache *block_group)
+int load_free_space_cache(struct btrfs_block_group_cache *block_group)
 {
+	struct btrfs_fs_info *fs_info = block_group->fs_info;
 	struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
 	struct inode *inode;
 	struct btrfs_path *path;
@@ -858,7 +858,7 @@ int load_free_space_cache(struct btrfs_fs_info *fs_info,
 	 * once created get their ->cached field set to BTRFS_CACHE_FINISHED so
 	 * we will never try to read their inode item while the fs is mounted.
 	 */
-	inode = lookup_free_space_inode(fs_info, block_group, path);
+	inode = lookup_free_space_inode(block_group, path);
 	if (IS_ERR(inode)) {
 		btrfs_free_path(path);
 		return 0;
@@ -1039,8 +1039,7 @@ fail:
 	return -1;
 }
 
-static noinline_for_stack int
-write_pinned_extent_entries(struct btrfs_fs_info *fs_info,
+static noinline_for_stack int write_pinned_extent_entries(
 			    struct btrfs_block_group_cache *block_group,
 			    struct btrfs_io_ctl *io_ctl,
 			    int *entries)
@@ -1059,7 +1058,7 @@ write_pinned_extent_entries(struct btrfs_fs_info *fs_info,
 	 * We shouldn't have switched the pinned extents yet so this is the
 	 * right one
 	 */
-	unpin = fs_info->pinned_extents;
+	unpin = block_group->fs_info->pinned_extents;
 
 	start = block_group->key.objectid;
 
@@ -1235,7 +1234,6 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
 				   struct btrfs_io_ctl *io_ctl,
 				   struct btrfs_trans_handle *trans)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct extent_state *cached_state = NULL;
 	LIST_HEAD(bitmap_list);
 	int entries = 0;
@@ -1293,8 +1291,7 @@ static int __btrfs_write_out_cache(struct btrfs_root *root, struct inode *inode,
 	 * If this changes while we are working we'll get added back to
 	 * the dirty list and redo it.  No locking needed
 	 */
-	ret = write_pinned_extent_entries(fs_info, block_group,
-					  io_ctl, &entries);
+	ret = write_pinned_extent_entries(block_group, io_ctl, &entries);
 	if (ret)
 		goto out_nospc_locked;
 
@@ -1370,11 +1367,11 @@ out_unlock:
 	goto out;
 }
 
-int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
-			  struct btrfs_trans_handle *trans,
+int btrfs_write_out_cache(struct btrfs_trans_handle *trans,
 			  struct btrfs_block_group_cache *block_group,
 			  struct btrfs_path *path)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
 	struct inode *inode;
 	int ret = 0;
@@ -1386,7 +1383,7 @@ int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
 	}
 	spin_unlock(&block_group->lock);
 
-	inode = lookup_free_space_inode(fs_info, block_group, path);
+	inode = lookup_free_space_inode(block_group, path);
 	if (IS_ERR(inode))
 		return 0;
 
@@ -3040,11 +3037,11 @@ setup_cluster_bitmap(struct btrfs_block_group_cache *block_group,
  * returns zero and sets up cluster if things worked out, otherwise
  * it returns -enospc
  */
-int btrfs_find_space_cluster(struct btrfs_fs_info *fs_info,
-			     struct btrfs_block_group_cache *block_group,
+int btrfs_find_space_cluster(struct btrfs_block_group_cache *block_group,
 			     struct btrfs_free_cluster *cluster,
 			     u64 offset, u64 bytes, u64 empty_size)
 {
+	struct btrfs_fs_info *fs_info = block_group->fs_info;
 	struct btrfs_free_space_ctl *ctl = block_group->free_space_ctl;
 	struct btrfs_free_space *entry, *tmp;
 	LIST_HEAD(bitmaps);
@@ -3366,10 +3363,6 @@ void btrfs_put_block_group_trimming(struct btrfs_block_group_cache *block_group)
 		em = lookup_extent_mapping(em_tree, block_group->key.objectid,
 					   1);
 		BUG_ON(!em); /* logic error, can't happen */
-		/*
-		 * remove_extent_mapping() will delete us from the pinned_chunks
-		 * list, which is protected by the chunk mutex.
-		 */
 		remove_extent_mapping(em_tree, em);
 		write_unlock(&em_tree->lock);
 		mutex_unlock(&fs_info->chunk_mutex);
diff --git a/fs/btrfs/free-space-cache.h b/fs/btrfs/free-space-cache.h
index 15e30b93db0d..8760acb55ffd 100644
--- a/fs/btrfs/free-space-cache.h
+++ b/fs/btrfs/free-space-cache.h
@@ -38,11 +38,10 @@ struct btrfs_free_space_op {
 
 struct btrfs_io_ctl;
 
-struct inode *lookup_free_space_inode(struct btrfs_fs_info *fs_info,
-				      struct btrfs_block_group_cache
-				      *block_group, struct btrfs_path *path);
-int create_free_space_inode(struct btrfs_fs_info *fs_info,
-			    struct btrfs_trans_handle *trans,
+struct inode *lookup_free_space_inode(
+		struct btrfs_block_group_cache *block_group,
+		struct btrfs_path *path);
+int create_free_space_inode(struct btrfs_trans_handle *trans,
 			    struct btrfs_block_group_cache *block_group,
 			    struct btrfs_path *path);
 
@@ -51,13 +50,11 @@ int btrfs_check_trunc_cache_free_space(struct btrfs_fs_info *fs_info,
 int btrfs_truncate_free_space_cache(struct btrfs_trans_handle *trans,
 				    struct btrfs_block_group_cache *block_group,
 				    struct inode *inode);
-int load_free_space_cache(struct btrfs_fs_info *fs_info,
-			  struct btrfs_block_group_cache *block_group);
+int load_free_space_cache(struct btrfs_block_group_cache *block_group);
 int btrfs_wait_cache_io(struct btrfs_trans_handle *trans,
 			struct btrfs_block_group_cache *block_group,
 			struct btrfs_path *path);
-int btrfs_write_out_cache(struct btrfs_fs_info *fs_info,
-			  struct btrfs_trans_handle *trans,
+int btrfs_write_out_cache(struct btrfs_trans_handle *trans,
 			  struct btrfs_block_group_cache *block_group,
 			  struct btrfs_path *path);
 struct inode *lookup_free_ino_inode(struct btrfs_root *root,
@@ -95,8 +92,7 @@ u64 btrfs_find_space_for_alloc(struct btrfs_block_group_cache *block_group,
 u64 btrfs_find_ino_for_alloc(struct btrfs_root *fs_root);
 void btrfs_dump_free_space(struct btrfs_block_group_cache *block_group,
 			   u64 bytes);
-int btrfs_find_space_cluster(struct btrfs_fs_info *fs_info,
-			     struct btrfs_block_group_cache *block_group,
+int btrfs_find_space_cluster(struct btrfs_block_group_cache *block_group,
 			     struct btrfs_free_cluster *cluster,
 			     u64 offset, u64 bytes, u64 empty_size);
 void btrfs_init_free_cluster(struct btrfs_free_cluster *cluster);
diff --git a/fs/btrfs/free-space-tree.c b/fs/btrfs/free-space-tree.c
index e5089087eaa6..f5dc115ebba0 100644
--- a/fs/btrfs/free-space-tree.c
+++ b/fs/btrfs/free-space-tree.c
@@ -76,10 +76,11 @@ out:
 
 EXPORT_FOR_TESTS
 struct btrfs_free_space_info *search_free_space_info(
-		struct btrfs_trans_handle *trans, struct btrfs_fs_info *fs_info,
+		struct btrfs_trans_handle *trans,
 		struct btrfs_block_group_cache *block_group,
 		struct btrfs_path *path, int cow)
 {
+	struct btrfs_fs_info *fs_info = block_group->fs_info;
 	struct btrfs_root *root = fs_info->free_space_root;
 	struct btrfs_key key;
 	int ret;
@@ -253,7 +254,7 @@ int convert_free_space_to_bitmaps(struct btrfs_trans_handle *trans,
 		btrfs_release_path(path);
 	}
 
-	info = search_free_space_info(trans, fs_info, block_group, path, 1);
+	info = search_free_space_info(trans, block_group, path, 1);
 	if (IS_ERR(info)) {
 		ret = PTR_ERR(info);
 		goto out;
@@ -398,7 +399,7 @@ int convert_free_space_to_extents(struct btrfs_trans_handle *trans,
 		btrfs_release_path(path);
 	}
 
-	info = search_free_space_info(trans, fs_info, block_group, path, 1);
+	info = search_free_space_info(trans, block_group, path, 1);
 	if (IS_ERR(info)) {
 		ret = PTR_ERR(info);
 		goto out;
@@ -463,8 +464,7 @@ static int update_free_space_extent_count(struct btrfs_trans_handle *trans,
 	if (new_extents == 0)
 		return 0;
 
-	info = search_free_space_info(trans, trans->fs_info, block_group, path,
-				      1);
+	info = search_free_space_info(trans, block_group, path, 1);
 	if (IS_ERR(info)) {
 		ret = PTR_ERR(info);
 		goto out;
@@ -793,8 +793,7 @@ int __remove_from_free_space_tree(struct btrfs_trans_handle *trans,
 			return ret;
 	}
 
-	info = search_free_space_info(NULL, trans->fs_info, block_group, path,
-				      0);
+	info = search_free_space_info(NULL, block_group, path, 0);
 	if (IS_ERR(info))
 		return PTR_ERR(info);
 	flags = btrfs_free_space_flags(path->nodes[0], info);
@@ -977,7 +976,6 @@ int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
 			     struct btrfs_block_group_cache *block_group,
 			     struct btrfs_path *path, u64 start, u64 size)
 {
-	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_free_space_info *info;
 	u32 flags;
 	int ret;
@@ -988,7 +986,7 @@ int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
 			return ret;
 	}
 
-	info = search_free_space_info(NULL, fs_info, block_group, path, 0);
+	info = search_free_space_info(NULL, block_group, path, 0);
 	if (IS_ERR(info))
 		return PTR_ERR(info);
 	flags = btrfs_free_space_flags(path->nodes[0], info);
@@ -1150,7 +1148,7 @@ int btrfs_create_free_space_tree(struct btrfs_fs_info *fs_info)
 		return PTR_ERR(trans);
 
 	set_bit(BTRFS_FS_CREATING_FREE_SPACE_TREE, &fs_info->flags);
-	free_space_root = btrfs_create_tree(trans, fs_info,
+	free_space_root = btrfs_create_tree(trans,
 					    BTRFS_FREE_SPACE_TREE_OBJECTID);
 	if (IS_ERR(free_space_root)) {
 		ret = PTR_ERR(free_space_root);
@@ -1248,7 +1246,7 @@ int btrfs_clear_free_space_tree(struct btrfs_fs_info *fs_info)
 	list_del(&free_space_root->dirty_list);
 
 	btrfs_tree_lock(free_space_root->node);
-	clean_tree_block(fs_info, free_space_root->node);
+	btrfs_clean_tree_block(free_space_root->node);
 	btrfs_tree_unlock(free_space_root->node);
 	btrfs_free_tree_block(trans, free_space_root, free_space_root->node,
 			      0, 1);
@@ -1534,14 +1532,12 @@ out:
 int load_free_space_tree(struct btrfs_caching_control *caching_ctl)
 {
 	struct btrfs_block_group_cache *block_group;
-	struct btrfs_fs_info *fs_info;
 	struct btrfs_free_space_info *info;
 	struct btrfs_path *path;
 	u32 extent_count, flags;
 	int ret;
 
 	block_group = caching_ctl->block_group;
-	fs_info = block_group->fs_info;
 
 	path = btrfs_alloc_path();
 	if (!path)
@@ -1555,7 +1551,7 @@ int load_free_space_tree(struct btrfs_caching_control *caching_ctl)
 	path->search_commit_root = 1;
 	path->reada = READA_FORWARD;
 
-	info = search_free_space_info(NULL, fs_info, block_group, path, 0);
+	info = search_free_space_info(NULL, block_group, path, 0);
 	if (IS_ERR(info)) {
 		ret = PTR_ERR(info);
 		goto out;
diff --git a/fs/btrfs/free-space-tree.h b/fs/btrfs/free-space-tree.h
index 3133651d7d70..22b7602bde25 100644
--- a/fs/btrfs/free-space-tree.h
+++ b/fs/btrfs/free-space-tree.h
@@ -30,7 +30,6 @@ int remove_from_free_space_tree(struct btrfs_trans_handle *trans,
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 struct btrfs_free_space_info *
 search_free_space_info(struct btrfs_trans_handle *trans,
-		       struct btrfs_fs_info *fs_info,
 		       struct btrfs_block_group_cache *block_group,
 		       struct btrfs_path *path, int cow);
 int __add_to_free_space_tree(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/inode-item.c b/fs/btrfs/inode-item.c
index a8956a3c9e05..30d62ef918b9 100644
--- a/fs/btrfs/inode-item.c
+++ b/fs/btrfs/inode-item.c
@@ -170,7 +170,7 @@ static int btrfs_del_inode_extref(struct btrfs_trans_handle *trans,
 	memmove_extent_buffer(leaf, ptr, ptr + del_len,
 			      item_size - (ptr + del_len - item_start));
 
-	btrfs_truncate_item(root->fs_info, path, item_size - del_len, 1);
+	btrfs_truncate_item(path, item_size - del_len, 1);
 
 out:
 	btrfs_free_path(path);
@@ -234,7 +234,7 @@ int btrfs_del_inode_ref(struct btrfs_trans_handle *trans,
 	item_start = btrfs_item_ptr_offset(leaf, path->slots[0]);
 	memmove_extent_buffer(leaf, ptr, ptr + sub_item_len,
 			      item_size - (ptr + sub_item_len - item_start));
-	btrfs_truncate_item(root->fs_info, path, item_size - sub_item_len, 1);
+	btrfs_truncate_item(path, item_size - sub_item_len, 1);
 out:
 	btrfs_free_path(path);
 
@@ -288,7 +288,7 @@ static int btrfs_insert_inode_extref(struct btrfs_trans_handle *trans,
 						   name, name_len, NULL))
 			goto out;
 
-		btrfs_extend_item(root->fs_info, path, ins_len);
+		btrfs_extend_item(path, ins_len);
 		ret = 0;
 	}
 	if (ret < 0)
@@ -347,7 +347,7 @@ int btrfs_insert_inode_ref(struct btrfs_trans_handle *trans,
 			goto out;
 
 		old_size = btrfs_item_size_nr(path->nodes[0], path->slots[0]);
-		btrfs_extend_item(fs_info, path, ins_len);
+		btrfs_extend_item(path, ins_len);
 		ref = btrfs_item_ptr(path->nodes[0], path->slots[0],
 				     struct btrfs_inode_ref);
 		ref = (struct btrfs_inode_ref *)((unsigned long)ref + old_size);
diff --git a/fs/btrfs/inode.c b/fs/btrfs/inode.c
index 5c349667c761..a2aabdb85226 100644
--- a/fs/btrfs/inode.c
+++ b/fs/btrfs/inode.c
@@ -28,6 +28,7 @@
 #include <linux/magic.h>
 #include <linux/iversion.h>
 #include <linux/swap.h>
+#include <linux/sched/mm.h>
 #include <asm/unaligned.h>
 #include "ctree.h"
 #include "disk-io.h"
@@ -73,17 +74,6 @@ struct kmem_cache *btrfs_trans_handle_cachep;
 struct kmem_cache *btrfs_path_cachep;
 struct kmem_cache *btrfs_free_space_cachep;
 
-#define S_SHIFT 12
-static const unsigned char btrfs_type_by_mode[S_IFMT >> S_SHIFT] = {
-	[S_IFREG >> S_SHIFT]	= BTRFS_FT_REG_FILE,
-	[S_IFDIR >> S_SHIFT]	= BTRFS_FT_DIR,
-	[S_IFCHR >> S_SHIFT]	= BTRFS_FT_CHRDEV,
-	[S_IFBLK >> S_SHIFT]	= BTRFS_FT_BLKDEV,
-	[S_IFIFO >> S_SHIFT]	= BTRFS_FT_FIFO,
-	[S_IFSOCK >> S_SHIFT]	= BTRFS_FT_SOCK,
-	[S_IFLNK >> S_SHIFT]	= BTRFS_FT_SYMLINK,
-};
-
 static int btrfs_setsize(struct inode *inode, struct iattr *attr);
 static int btrfs_truncate(struct inode *inode, bool skip_writeback);
 static int btrfs_finish_ordered_io(struct btrfs_ordered_extent *ordered_extent);
@@ -366,18 +356,24 @@ struct async_extent {
 	struct list_head list;
 };
 
-struct async_cow {
+struct async_chunk {
 	struct inode *inode;
-	struct btrfs_fs_info *fs_info;
 	struct page *locked_page;
 	u64 start;
 	u64 end;
 	unsigned int write_flags;
 	struct list_head extents;
 	struct btrfs_work work;
+	atomic_t *pending;
+};
+
+struct async_cow {
+	/* Number of chunks in flight; must be first in the structure */
+	atomic_t num_chunks;
+	struct async_chunk chunks[];
 };
 
-static noinline int add_async_extent(struct async_cow *cow,
+static noinline int add_async_extent(struct async_chunk *cow,
 				     u64 start, u64 ram_size,
 				     u64 compressed_size,
 				     struct page **pages,
@@ -444,16 +440,15 @@ static inline void inode_should_defrag(struct btrfs_inode *inode,
  * are written in the same order that the flusher thread sent them
  * down.
  */
-static noinline void compress_file_range(struct inode *inode,
-					struct page *locked_page,
-					u64 start, u64 end,
-					struct async_cow *async_cow,
-					int *num_added)
+static noinline void compress_file_range(struct async_chunk *async_chunk,
+					 int *num_added)
 {
+	struct inode *inode = async_chunk->inode;
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	u64 blocksize = fs_info->sectorsize;
+	u64 start = async_chunk->start;
+	u64 end = async_chunk->end;
 	u64 actual_end;
-	u64 isize = i_size_read(inode);
 	int ret = 0;
 	struct page **pages = NULL;
 	unsigned long nr_pages;
@@ -467,7 +462,7 @@ static noinline void compress_file_range(struct inode *inode,
 	inode_should_defrag(BTRFS_I(inode), start, end, end - start + 1,
 			SZ_16K);
 
-	actual_end = min_t(u64, isize, end + 1);
+	actual_end = min_t(u64, i_size_read(inode), end + 1);
 again:
 	will_compress = 0;
 	nr_pages = (end >> PAGE_SHIFT) - (start >> PAGE_SHIFT) + 1;
@@ -631,7 +626,7 @@ cont:
 			 * allocation on disk for these compressed pages, and
 			 * will submit them to the elevator.
 			 */
-			add_async_extent(async_cow, start, total_in,
+			add_async_extent(async_chunk, start, total_in,
 					total_compressed, pages, nr_pages,
 					compress_type);
 
@@ -671,14 +666,14 @@ cleanup_and_bail_uncompressed:
 	 * to our extent and set things up for the async work queue to run
 	 * cow_file_range to do the normal delalloc dance.
 	 */
-	if (page_offset(locked_page) >= start &&
-	    page_offset(locked_page) <= end)
-		__set_page_dirty_nobuffers(locked_page);
+	if (page_offset(async_chunk->locked_page) >= start &&
+	    page_offset(async_chunk->locked_page) <= end)
+		__set_page_dirty_nobuffers(async_chunk->locked_page);
 		/* unlocked later on in the async handlers */
 
 	if (redirty)
 		extent_range_redirty_for_io(inode, start, end);
-	add_async_extent(async_cow, start, end - start + 1, 0, NULL, 0,
+	add_async_extent(async_chunk, start, end - start + 1, 0, NULL, 0,
 			 BTRFS_COMPRESS_NONE);
 	*num_added += 1;
 
@@ -714,38 +709,34 @@ static void free_async_extent_pages(struct async_extent *async_extent)
  * queued.  We walk all the async extents created by compress_file_range
  * and send them down to the disk.
  */
-static noinline void submit_compressed_extents(struct inode *inode,
-					      struct async_cow *async_cow)
+static noinline void submit_compressed_extents(struct async_chunk *async_chunk)
 {
+	struct inode *inode = async_chunk->inode;
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	struct async_extent *async_extent;
 	u64 alloc_hint = 0;
 	struct btrfs_key ins;
 	struct extent_map *em;
 	struct btrfs_root *root = BTRFS_I(inode)->root;
-	struct extent_io_tree *io_tree;
+	struct extent_io_tree *io_tree = &BTRFS_I(inode)->io_tree;
 	int ret = 0;
 
 again:
-	while (!list_empty(&async_cow->extents)) {
-		async_extent = list_entry(async_cow->extents.next,
+	while (!list_empty(&async_chunk->extents)) {
+		async_extent = list_entry(async_chunk->extents.next,
 					  struct async_extent, list);
 		list_del(&async_extent->list);
 
-		io_tree = &BTRFS_I(inode)->io_tree;
-
 retry:
+		lock_extent(io_tree, async_extent->start,
+			    async_extent->start + async_extent->ram_size - 1);
 		/* did the compression code fall back to uncompressed IO? */
 		if (!async_extent->pages) {
 			int page_started = 0;
 			unsigned long nr_written = 0;
 
-			lock_extent(io_tree, async_extent->start,
-					 async_extent->start +
-					 async_extent->ram_size - 1);
-
 			/* allocate blocks */
-			ret = cow_file_range(inode, async_cow->locked_page,
+			ret = cow_file_range(inode, async_chunk->locked_page,
 					     async_extent->start,
 					     async_extent->start +
 					     async_extent->ram_size - 1,
@@ -769,15 +760,12 @@ retry:
 						  async_extent->ram_size - 1,
 						  WB_SYNC_ALL);
 			else if (ret)
-				unlock_page(async_cow->locked_page);
+				unlock_page(async_chunk->locked_page);
 			kfree(async_extent);
 			cond_resched();
 			continue;
 		}
 
-		lock_extent(io_tree, async_extent->start,
-			    async_extent->start + async_extent->ram_size - 1);
-
 		ret = btrfs_reserve_extent(root, async_extent->ram_size,
 					   async_extent->compressed_size,
 					   async_extent->compressed_size,
@@ -856,7 +844,7 @@ retry:
 				    ins.objectid,
 				    ins.offset, async_extent->pages,
 				    async_extent->nr_pages,
-				    async_cow->write_flags)) {
+				    async_chunk->write_flags)) {
 			struct page *p = async_extent->pages[0];
 			const u64 start = async_extent->start;
 			const u64 end = start + async_extent->ram_size - 1;
@@ -1133,16 +1121,15 @@ out_unlock:
  */
 static noinline void async_cow_start(struct btrfs_work *work)
 {
-	struct async_cow *async_cow;
+	struct async_chunk *async_chunk;
 	int num_added = 0;
-	async_cow = container_of(work, struct async_cow, work);
 
-	compress_file_range(async_cow->inode, async_cow->locked_page,
-			    async_cow->start, async_cow->end, async_cow,
-			    &num_added);
+	async_chunk = container_of(work, struct async_chunk, work);
+
+	compress_file_range(async_chunk, &num_added);
 	if (num_added == 0) {
-		btrfs_add_delayed_iput(async_cow->inode);
-		async_cow->inode = NULL;
+		btrfs_add_delayed_iput(async_chunk->inode);
+		async_chunk->inode = NULL;
 	}
 }
 
@@ -1151,14 +1138,12 @@ static noinline void async_cow_start(struct btrfs_work *work)
  */
 static noinline void async_cow_submit(struct btrfs_work *work)
 {
-	struct btrfs_fs_info *fs_info;
-	struct async_cow *async_cow;
+	struct async_chunk *async_chunk = container_of(work, struct async_chunk,
+						     work);
+	struct btrfs_fs_info *fs_info = btrfs_work_owner(work);
 	unsigned long nr_pages;
 
-	async_cow = container_of(work, struct async_cow, work);
-
-	fs_info = async_cow->fs_info;
-	nr_pages = (async_cow->end - async_cow->start + PAGE_SIZE) >>
+	nr_pages = (async_chunk->end - async_chunk->start + PAGE_SIZE) >>
 		PAGE_SHIFT;
 
 	/* atomic_sub_return implies a barrier */
@@ -1166,17 +1151,29 @@ static noinline void async_cow_submit(struct btrfs_work *work)
 	    5 * SZ_1M)
 		cond_wake_up_nomb(&fs_info->async_submit_wait);
 
-	if (async_cow->inode)
-		submit_compressed_extents(async_cow->inode, async_cow);
+	/*
+	 * ->inode could be NULL if async_chunk_start has failed to compress,
+	 * in which case we don't have anything to submit, yet we need to
+	 * always adjust ->async_delalloc_pages as its paired with the init
+	 * happening in cow_file_range_async
+	 */
+	if (async_chunk->inode)
+		submit_compressed_extents(async_chunk);
 }
 
 static noinline void async_cow_free(struct btrfs_work *work)
 {
-	struct async_cow *async_cow;
-	async_cow = container_of(work, struct async_cow, work);
-	if (async_cow->inode)
-		btrfs_add_delayed_iput(async_cow->inode);
-	kfree(async_cow);
+	struct async_chunk *async_chunk;
+
+	async_chunk = container_of(work, struct async_chunk, work);
+	if (async_chunk->inode)
+		btrfs_add_delayed_iput(async_chunk->inode);
+	/*
+	 * Since the pointer to 'pending' is at the beginning of the array of
+	 * async_chunk's, freeing it ensures the whole array has been freed.
+	 */
+	if (atomic_dec_and_test(async_chunk->pending))
+		kvfree(async_chunk->pending);
 }
 
 static int cow_file_range_async(struct inode *inode, struct page *locked_page,
@@ -1185,40 +1182,73 @@ static int cow_file_range_async(struct inode *inode, struct page *locked_page,
 				unsigned int write_flags)
 {
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
-	struct async_cow *async_cow;
+	struct async_cow *ctx;
+	struct async_chunk *async_chunk;
 	unsigned long nr_pages;
 	u64 cur_end;
+	u64 num_chunks = DIV_ROUND_UP(end - start, SZ_512K);
+	int i;
+	bool should_compress;
+	unsigned nofs_flag;
 
-	clear_extent_bit(&BTRFS_I(inode)->io_tree, start, end, EXTENT_LOCKED,
-			 1, 0, NULL);
-	while (start < end) {
-		async_cow = kmalloc(sizeof(*async_cow), GFP_NOFS);
-		BUG_ON(!async_cow); /* -ENOMEM */
-		async_cow->inode = igrab(inode);
-		async_cow->fs_info = fs_info;
-		async_cow->locked_page = locked_page;
-		async_cow->start = start;
-		async_cow->write_flags = write_flags;
-
-		if (BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS &&
-		    !btrfs_test_opt(fs_info, FORCE_COMPRESS))
-			cur_end = end;
-		else
-			cur_end = min(end, start + SZ_512K - 1);
+	unlock_extent(&BTRFS_I(inode)->io_tree, start, end);
 
-		async_cow->end = cur_end;
-		INIT_LIST_HEAD(&async_cow->extents);
+	if (BTRFS_I(inode)->flags & BTRFS_INODE_NOCOMPRESS &&
+	    !btrfs_test_opt(fs_info, FORCE_COMPRESS)) {
+		num_chunks = 1;
+		should_compress = false;
+	} else {
+		should_compress = true;
+	}
+
+	nofs_flag = memalloc_nofs_save();
+	ctx = kvmalloc(struct_size(ctx, chunks, num_chunks), GFP_KERNEL);
+	memalloc_nofs_restore(nofs_flag);
+
+	if (!ctx) {
+		unsigned clear_bits = EXTENT_LOCKED | EXTENT_DELALLOC |
+			EXTENT_DELALLOC_NEW | EXTENT_DEFRAG |
+			EXTENT_DO_ACCOUNTING;
+		unsigned long page_ops = PAGE_UNLOCK | PAGE_CLEAR_DIRTY |
+			PAGE_SET_WRITEBACK | PAGE_END_WRITEBACK |
+			PAGE_SET_ERROR;
+
+		extent_clear_unlock_delalloc(inode, start, end, 0, locked_page,
+					     clear_bits, page_ops);
+		return -ENOMEM;
+	}
 
-		btrfs_init_work(&async_cow->work,
+	async_chunk = ctx->chunks;
+	atomic_set(&ctx->num_chunks, num_chunks);
+
+	for (i = 0; i < num_chunks; i++) {
+		if (should_compress)
+			cur_end = min(end, start + SZ_512K - 1);
+		else
+			cur_end = end;
+
+		/*
+		 * igrab is called higher up in the call chain, take only the
+		 * lightweight reference for the callback lifetime
+		 */
+		ihold(inode);
+		async_chunk[i].pending = &ctx->num_chunks;
+		async_chunk[i].inode = inode;
+		async_chunk[i].start = start;
+		async_chunk[i].end = cur_end;
+		async_chunk[i].locked_page = locked_page;
+		async_chunk[i].write_flags = write_flags;
+		INIT_LIST_HEAD(&async_chunk[i].extents);
+
+		btrfs_init_work(&async_chunk[i].work,
 				btrfs_delalloc_helper,
 				async_cow_start, async_cow_submit,
 				async_cow_free);
 
-		nr_pages = (cur_end - start + PAGE_SIZE) >>
-			PAGE_SHIFT;
+		nr_pages = DIV_ROUND_UP(cur_end - start, PAGE_SIZE);
 		atomic_add(nr_pages, &fs_info->async_delalloc_pages);
 
-		btrfs_queue_work(fs_info->delalloc_workers, &async_cow->work);
+		btrfs_queue_work(fs_info->delalloc_workers, &async_chunk[i].work);
 
 		*nr_written += nr_pages;
 		start = cur_end + 1;
@@ -1441,7 +1471,7 @@ next_slot:
 			extent_end = ALIGN(extent_end,
 					   fs_info->sectorsize);
 		} else {
-			BUG_ON(1);
+			BUG();
 		}
 out_check:
 		if (extent_end <= start) {
@@ -1586,11 +1616,10 @@ static inline int need_force_cow(struct inode *inode, u64 start, u64 end)
  * Function to process delayed allocation (create CoW) for ranges which are
  * being touched for the first time.
  */
-int btrfs_run_delalloc_range(void *private_data, struct page *locked_page,
+int btrfs_run_delalloc_range(struct inode *inode, struct page *locked_page,
 		u64 start, u64 end, int *page_started, unsigned long *nr_written,
 		struct writeback_control *wbc)
 {
-	struct inode *inode = private_data;
 	int ret;
 	int force_cow = need_force_cow(inode, start, end);
 	unsigned int write_flags = wbc_to_write_flags(wbc);
@@ -1955,11 +1984,11 @@ static blk_status_t btrfs_submit_bio_start(void *private_data, struct bio *bio,
  *
  *    c-3) otherwise:			async submit
  */
-static blk_status_t btrfs_submit_bio_hook(void *private_data, struct bio *bio,
-				 int mirror_num, unsigned long bio_flags,
-				 u64 bio_offset)
+static blk_status_t btrfs_submit_bio_hook(struct inode *inode, struct bio *bio,
+					  int mirror_num,
+					  unsigned long bio_flags)
+
 {
-	struct inode *inode = private_data;
 	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
 	struct btrfs_root *root = BTRFS_I(inode)->root;
 	enum btrfs_wq_endio_type metadata = BTRFS_WQ_ENDIO_DATA;
@@ -1994,8 +2023,7 @@ static blk_status_t btrfs_submit_bio_hook(void *private_data, struct bio *bio,
 			goto mapit;
 		/* we're doing a write, do the async checksumming */
 		ret = btrfs_wq_submit_bio(fs_info, bio, mirror_num, bio_flags,
-					  bio_offset, inode,
-					  btrfs_submit_bio_start);
+					  0, inode, btrfs_submit_bio_start);
 		goto out;
 	} else if (!skip_sum) {
 		ret = btrfs_csum_one_bio(inode, bio, 0, 0);
@@ -2522,6 +2550,7 @@ static noinline int relink_extent_backref(struct btrfs_path *path,
 	struct btrfs_file_extent_item *item;
 	struct btrfs_ordered_extent *ordered;
 	struct btrfs_trans_handle *trans;
+	struct btrfs_ref ref = { 0 };
 	struct btrfs_root *root;
 	struct btrfs_key key;
 	struct extent_buffer *leaf;
@@ -2692,10 +2721,11 @@ again:
 	inode_add_bytes(inode, len);
 	btrfs_release_path(path);
 
-	ret = btrfs_inc_extent_ref(trans, root, new->bytenr,
-			new->disk_len, 0,
-			backref->root_id, backref->inum,
-			new->file_pos);	/* start - extent_offset */
+	btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, new->bytenr,
+			       new->disk_len, 0);
+	btrfs_init_data_ref(&ref, backref->root_id, backref->inum,
+			    new->file_pos);  /* start - extent_offset */
+	ret = btrfs_inc_extent_ref(trans, &ref);
 	if (ret) {
 		btrfs_abort_transaction(trans, ret);
 		goto out_free_path;
@@ -3247,6 +3277,7 @@ void btrfs_add_delayed_iput(struct inode *inode)
 	if (atomic_add_unless(&inode->i_count, -1, 1))
 		return;
 
+	atomic_inc(&fs_info->nr_delayed_iputs);
 	spin_lock(&fs_info->delayed_iput_lock);
 	ASSERT(list_empty(&binode->delayed_iput));
 	list_add_tail(&binode->delayed_iput, &fs_info->delayed_iputs);
@@ -3267,11 +3298,32 @@ void btrfs_run_delayed_iputs(struct btrfs_fs_info *fs_info)
 		list_del_init(&inode->delayed_iput);
 		spin_unlock(&fs_info->delayed_iput_lock);
 		iput(&inode->vfs_inode);
+		if (atomic_dec_and_test(&fs_info->nr_delayed_iputs))
+			wake_up(&fs_info->delayed_iputs_wait);
 		spin_lock(&fs_info->delayed_iput_lock);
 	}
 	spin_unlock(&fs_info->delayed_iput_lock);
 }
 
+/**
+ * btrfs_wait_on_delayed_iputs - wait on the delayed iputs to be done running
+ * @fs_info - the fs_info for this fs
+ * @return - EINTR if we were killed, 0 if nothing's pending
+ *
+ * This will wait on any delayed iputs that are currently running with KILLABLE
+ * set.  Once they are all done running we will return, unless we are killed in
+ * which case we return EINTR. This helps in user operations like fallocate etc
+ * that might get blocked on the iputs.
+ */
+int btrfs_wait_on_delayed_iputs(struct btrfs_fs_info *fs_info)
+{
+	int ret = wait_event_killable(fs_info->delayed_iputs_wait,
+			atomic_read(&fs_info->nr_delayed_iputs) == 0);
+	if (ret)
+		return -EINTR;
+	return 0;
+}
+
 /*
  * This creates an orphan entry for the given inode in case something goes wrong
  * in the middle of an unlink.
@@ -3668,21 +3720,6 @@ cache_index:
 	 * inode is not a directory, logging its parent unnecessarily.
 	 */
 	BTRFS_I(inode)->last_unlink_trans = BTRFS_I(inode)->last_trans;
-	/*
-	 * Similar reasoning for last_link_trans, needs to be set otherwise
-	 * for a case like the following:
-	 *
-	 * mkdir A
-	 * touch foo
-	 * ln foo A/bar
-	 * echo 2 > /proc/sys/vm/drop_caches
-	 * fsync foo
-	 * <power failure>
-	 *
-	 * Would result in link bar and directory A not existing after the power
-	 * failure.
-	 */
-	BTRFS_I(inode)->last_link_trans = BTRFS_I(inode)->last_trans;
 
 	path->slots[0]++;
 	if (inode->i_nlink != 1 ||
@@ -4648,7 +4685,7 @@ search_again:
 
 				btrfs_set_file_extent_ram_bytes(leaf, fi, size);
 				size = btrfs_file_extent_calc_inline_size(size);
-				btrfs_truncate_item(root->fs_info, path, size, 1);
+				btrfs_truncate_item(path, size, 1);
 			} else if (!del_item) {
 				/*
 				 * We have to bail so the last_size is set to
@@ -4687,12 +4724,17 @@ delete:
 		if (found_extent &&
 		    (test_bit(BTRFS_ROOT_REF_COWS, &root->state) ||
 		     root == fs_info->tree_root)) {
+			struct btrfs_ref ref = { 0 };
+
 			btrfs_set_path_blocking(path);
 			bytes_deleted += extent_num_bytes;
-			ret = btrfs_free_extent(trans, root, extent_start,
-						extent_num_bytes, 0,
-						btrfs_header_owner(leaf),
-						ino, extent_offset);
+
+			btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF,
+					extent_start, extent_num_bytes, 0);
+			ref.real_root = root->root_key.objectid;
+			btrfs_init_data_ref(&ref, btrfs_header_owner(leaf),
+					ino, extent_offset);
+			ret = btrfs_free_extent(trans, &ref);
 			if (ret) {
 				btrfs_abort_transaction(trans, ret);
 				break;
@@ -5262,13 +5304,15 @@ static struct btrfs_trans_handle *evict_refill_and_join(struct btrfs_root *root,
 {
 	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_block_rsv *global_rsv = &fs_info->global_block_rsv;
+	u64 delayed_refs_extra = btrfs_calc_trans_metadata_size(fs_info, 1);
 	int failures = 0;
 
 	for (;;) {
 		struct btrfs_trans_handle *trans;
 		int ret;
 
-		ret = btrfs_block_rsv_refill(root, rsv, rsv->size,
+		ret = btrfs_block_rsv_refill(root, rsv,
+					     rsv->size + delayed_refs_extra,
 					     BTRFS_RESERVE_FLUSH_LIMIT);
 
 		if (ret && ++failures > 2) {
@@ -5277,9 +5321,28 @@ static struct btrfs_trans_handle *evict_refill_and_join(struct btrfs_root *root,
 			return ERR_PTR(-ENOSPC);
 		}
 
+		/*
+		 * Evict can generate a large amount of delayed refs without
+		 * having a way to add space back since we exhaust our temporary
+		 * block rsv.  We aren't allowed to do FLUSH_ALL in this case
+		 * because we could deadlock with so many things in the flushing
+		 * code, so we have to try and hold some extra space to
+		 * compensate for our delayed ref generation.  If we can't get
+		 * that space then we need see if we can steal our minimum from
+		 * the global reserve.  We will be ratelimited by the amount of
+		 * space we have for the delayed refs rsv, so we'll end up
+		 * committing and trying again.
+		 */
 		trans = btrfs_join_transaction(root);
-		if (IS_ERR(trans) || !ret)
+		if (IS_ERR(trans) || !ret) {
+			if (!IS_ERR(trans)) {
+				trans->block_rsv = &fs_info->trans_block_rsv;
+				trans->bytes_reserved = delayed_refs_extra;
+				btrfs_block_rsv_migrate(rsv, trans->block_rsv,
+							delayed_refs_extra, 1);
+			}
 			return trans;
+		}
 
 		/*
 		 * Try to steal from the global reserve if there is space for
@@ -5396,12 +5459,14 @@ no_delete:
 }
 
 /*
- * this returns the key found in the dir entry in the location pointer.
+ * Return the key found in the dir entry in the location pointer, fill @type
+ * with BTRFS_FT_*, and return 0.
+ *
  * If no dir entries were found, returns -ENOENT.
  * If found a corrupted location in dir entry, returns -EUCLEAN.
  */
 static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
-			       struct btrfs_key *location)
+			       struct btrfs_key *location, u8 *type)
 {
 	const char *name = dentry->d_name.name;
 	int namelen = dentry->d_name.len;
@@ -5430,6 +5495,8 @@ static int btrfs_inode_by_name(struct inode *dir, struct dentry *dentry,
 			   __func__, name, btrfs_ino(BTRFS_I(dir)),
 			   location->objectid, location->type, location->offset);
 	}
+	if (!ret)
+		*type = btrfs_dir_type(path->nodes[0], di);
 out:
 	btrfs_free_path(path);
 	return ret;
@@ -5667,6 +5734,24 @@ static struct inode *new_simple_dir(struct super_block *s,
 	return inode;
 }
 
+static inline u8 btrfs_inode_type(struct inode *inode)
+{
+	/*
+	 * Compile-time asserts that generic FT_* types still match
+	 * BTRFS_FT_* types
+	 */
+	BUILD_BUG_ON(BTRFS_FT_UNKNOWN != FT_UNKNOWN);
+	BUILD_BUG_ON(BTRFS_FT_REG_FILE != FT_REG_FILE);
+	BUILD_BUG_ON(BTRFS_FT_DIR != FT_DIR);
+	BUILD_BUG_ON(BTRFS_FT_CHRDEV != FT_CHRDEV);
+	BUILD_BUG_ON(BTRFS_FT_BLKDEV != FT_BLKDEV);
+	BUILD_BUG_ON(BTRFS_FT_FIFO != FT_FIFO);
+	BUILD_BUG_ON(BTRFS_FT_SOCK != FT_SOCK);
+	BUILD_BUG_ON(BTRFS_FT_SYMLINK != FT_SYMLINK);
+
+	return fs_umode_to_ftype(inode->i_mode);
+}
+
 struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
 {
 	struct btrfs_fs_info *fs_info = btrfs_sb(dir->i_sb);
@@ -5674,18 +5759,31 @@ struct inode *btrfs_lookup_dentry(struct inode *dir, struct dentry *dentry)
 	struct btrfs_root *root = BTRFS_I(dir)->root;
 	struct btrfs_root *sub_root = root;
 	struct btrfs_key location;
+	u8 di_type = 0;
 	int index;
 	int ret = 0;
 
 	if (dentry->d_name.len > BTRFS_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	ret = btrfs_inode_by_name(dir, dentry, &location);
+	ret = btrfs_inode_by_name(dir, dentry, &location, &di_type);
 	if (ret < 0)
 		return ERR_PTR(ret);
 
 	if (location.type == BTRFS_INODE_ITEM_KEY) {
 		inode = btrfs_iget(dir->i_sb, &location, root, NULL);
+		if (IS_ERR(inode))
+			return inode;
+
+		/* Do extra check against inode mode with di_type */
+		if (btrfs_inode_type(inode) != di_type) {
+			btrfs_crit(fs_info,
+"inode mode mismatch with dir: inode mode=0%o btrfs type=%u dir type=%u",
+				  inode->i_mode, btrfs_inode_type(inode),
+				  di_type);
+			iput(inode);
+			return ERR_PTR(-EUCLEAN);
+		}
 		return inode;
 	}
 
@@ -5745,10 +5843,6 @@ static struct dentry *btrfs_lookup(struct inode *dir, struct dentry *dentry,
 	return d_splice_alias(inode, dentry);
 }
 
-unsigned char btrfs_filetype_table[] = {
-	DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
-};
-
 /*
  * All this infrastructure exists because dir_emit can fault, and we are holding
  * the tree lock when doing readdir.  For now just allocate a buffer and copy
@@ -5887,7 +5981,7 @@ again:
 		name_ptr = (char *)(entry + 1);
 		read_extent_buffer(leaf, name_ptr, (unsigned long)(di + 1),
 				   name_len);
-		put_unaligned(btrfs_filetype_table[btrfs_dir_type(leaf, di)],
+		put_unaligned(fs_ftype_to_dtype(btrfs_dir_type(leaf, di)),
 				&entry->type);
 		btrfs_dir_item_key_to_cpu(leaf, di, &location);
 		put_unaligned(location.objectid, &entry->ino);
@@ -6290,11 +6384,6 @@ fail:
 	return ERR_PTR(ret);
 }
 
-static inline u8 btrfs_inode_type(struct inode *inode)
-{
-	return btrfs_type_by_mode[(inode->i_mode & S_IFMT) >> S_SHIFT];
-}
-
 /*
  * utility function to add 'inode' into 'parent_inode' with
  * a give name and a given sequence number.
@@ -6344,8 +6433,18 @@ int btrfs_add_link(struct btrfs_trans_handle *trans,
 	btrfs_i_size_write(parent_inode, parent_inode->vfs_inode.i_size +
 			   name_len * 2);
 	inode_inc_iversion(&parent_inode->vfs_inode);
-	parent_inode->vfs_inode.i_mtime = parent_inode->vfs_inode.i_ctime =
-		current_time(&parent_inode->vfs_inode);
+	/*
+	 * If we are replaying a log tree, we do not want to update the mtime
+	 * and ctime of the parent directory with the current time, since the
+	 * log replay procedure is responsible for setting them to their correct
+	 * values (the ones it had when the fsync was done).
+	 */
+	if (!test_bit(BTRFS_FS_LOG_RECOVERING, &root->fs_info->flags)) {
+		struct timespec64 now = current_time(&parent_inode->vfs_inode);
+
+		parent_inode->vfs_inode.i_mtime = now;
+		parent_inode->vfs_inode.i_ctime = now;
+	}
 	ret = btrfs_update_inode(trans, root, &parent_inode->vfs_inode);
 	if (ret)
 		btrfs_abort_transaction(trans, ret);
@@ -6582,7 +6681,6 @@ static int btrfs_link(struct dentry *old_dentry, struct inode *dir,
 			if (err)
 				goto fail;
 		}
-		BTRFS_I(inode)->last_link_trans = trans->transid;
 		d_instantiate(dentry, inode);
 		ret = btrfs_log_new_name(trans, BTRFS_I(inode), NULL, parent,
 					 true, NULL);
@@ -6731,7 +6829,7 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
 	u64 extent_start = 0;
 	u64 extent_end = 0;
 	u64 objectid = btrfs_ino(inode);
-	u32 found_type;
+	int extent_type = -1;
 	struct btrfs_path *path = NULL;
 	struct btrfs_root *root = inode->root;
 	struct btrfs_file_extent_item *item;
@@ -6786,9 +6884,7 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
 	if (ret < 0) {
 		err = ret;
 		goto out;
-	}
-
-	if (ret != 0) {
+	} else if (ret > 0) {
 		if (path->slots[0] == 0)
 			goto not_found;
 		path->slots[0]--;
@@ -6797,11 +6893,9 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
 	leaf = path->nodes[0];
 	item = btrfs_item_ptr(leaf, path->slots[0],
 			      struct btrfs_file_extent_item);
-	/* are we inside the extent that was found? */
 	btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
-	found_type = found_key.type;
 	if (found_key.objectid != objectid ||
-	    found_type != BTRFS_EXTENT_DATA_KEY) {
+	    found_key.type != BTRFS_EXTENT_DATA_KEY) {
 		/*
 		 * If we backup past the first extent we want to move forward
 		 * and see if there is an extent in front of us, otherwise we'll
@@ -6812,16 +6906,24 @@ struct extent_map *btrfs_get_extent(struct btrfs_inode *inode,
 		goto next;
 	}
 
-	found_type = btrfs_file_extent_type(leaf, item);
+	extent_type = btrfs_file_extent_type(leaf, item);
 	extent_start = found_key.offset;
-	if (found_type == BTRFS_FILE_EXTENT_REG ||
-	    found_type == BTRFS_FILE_EXTENT_PREALLOC) {
+	if (extent_type == BTRFS_FILE_EXTENT_REG ||
+	    extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
+		/* Only regular file could have regular/prealloc extent */
+		if (!S_ISREG(inode->vfs_inode.i_mode)) {
+			ret = -EUCLEAN;
+			btrfs_crit(fs_info,
+		"regular/prealloc extent found for non-regular inode %llu",
+				   btrfs_ino(inode));
+			goto out;
+		}
 		extent_end = extent_start +
 		       btrfs_file_extent_num_bytes(leaf, item);
 
 		trace_btrfs_get_extent_show_fi_regular(inode, leaf, item,
 						       extent_start);
-	} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
+	} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 		size_t size;
 
 		size = btrfs_file_extent_ram_bytes(leaf, item);
@@ -6840,9 +6942,9 @@ next:
 			if (ret < 0) {
 				err = ret;
 				goto out;
-			}
-			if (ret > 0)
+			} else if (ret > 0) {
 				goto not_found;
+			}
 			leaf = path->nodes[0];
 		}
 		btrfs_item_key_to_cpu(leaf, &found_key, path->slots[0]);
@@ -6853,19 +6955,22 @@ next:
 			goto not_found;
 		if (start > found_key.offset)
 			goto next;
+
+		/* New extent overlaps with existing one */
 		em->start = start;
 		em->orig_start = start;
 		em->len = found_key.offset - start;
-		goto not_found_em;
+		em->block_start = EXTENT_MAP_HOLE;
+		goto insert;
 	}
 
 	btrfs_extent_item_to_extent_map(inode, path, item,
 			new_inline, em);
 
-	if (found_type == BTRFS_FILE_EXTENT_REG ||
-	    found_type == BTRFS_FILE_EXTENT_PREALLOC) {
+	if (extent_type == BTRFS_FILE_EXTENT_REG ||
+	    extent_type == BTRFS_FILE_EXTENT_PREALLOC) {
 		goto insert;
-	} else if (found_type == BTRFS_FILE_EXTENT_INLINE) {
+	} else if (extent_type == BTRFS_FILE_EXTENT_INLINE) {
 		unsigned long ptr;
 		char *map;
 		size_t size;
@@ -6916,7 +7021,6 @@ not_found:
 	em->start = start;
 	em->orig_start = start;
 	em->len = len;
-not_found_em:
 	em->block_start = EXTENT_MAP_HOLE;
 insert:
 	btrfs_release_path(path);
@@ -6946,19 +7050,17 @@ out:
 }
 
 struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
-		struct page *page,
-		size_t pg_offset, u64 start, u64 len,
-		int create)
+					   u64 start, u64 len)
 {
 	struct extent_map *em;
 	struct extent_map *hole_em = NULL;
-	u64 range_start = start;
+	u64 delalloc_start = start;
 	u64 end;
-	u64 found;
-	u64 found_end;
+	u64 delalloc_len;
+	u64 delalloc_end;
 	int err = 0;
 
-	em = btrfs_get_extent(inode, page, pg_offset, start, len, create);
+	em = btrfs_get_extent(inode, NULL, 0, start, len, 0);
 	if (IS_ERR(em))
 		return em;
 	/*
@@ -6983,80 +7085,84 @@ struct extent_map *btrfs_get_extent_fiemap(struct btrfs_inode *inode,
 	em = NULL;
 
 	/* ok, we didn't find anything, lets look for delalloc */
-	found = count_range_bits(&inode->io_tree, &range_start,
+	delalloc_len = count_range_bits(&inode->io_tree, &delalloc_start,
 				 end, len, EXTENT_DELALLOC, 1);
-	found_end = range_start + found;
-	if (found_end < range_start)
-		found_end = (u64)-1;
+	delalloc_end = delalloc_start + delalloc_len;
+	if (delalloc_end < delalloc_start)
+		delalloc_end = (u64)-1;
 
 	/*
-	 * we didn't find anything useful, return
-	 * the original results from get_extent()
+	 * We didn't find anything useful, return the original results from
+	 * get_extent()
 	 */
-	if (range_start > end || found_end <= start) {
+	if (delalloc_start > end || delalloc_end <= start) {
 		em = hole_em;
 		hole_em = NULL;
 		goto out;
 	}
 
-	/* adjust the range_start to make sure it doesn't
-	 * go backwards from the start they passed in
+	/*
+	 * Adjust the delalloc_start to make sure it doesn't go backwards from
+	 * the start they passed in
 	 */
-	range_start = max(start, range_start);
-	found = found_end - range_start;
+	delalloc_start = max(start, delalloc_start);
+	delalloc_len = delalloc_end - delalloc_start;
 
-	if (found > 0) {
-		u64 hole_start = start;
-		u64 hole_len = len;
+	if (delalloc_len > 0) {
+		u64 hole_start;
+		u64 hole_len;
+		const u64 hole_end = extent_map_end(hole_em);
 
 		em = alloc_extent_map();
 		if (!em) {
 			err = -ENOMEM;
 			goto out;
 		}
+		em->bdev = NULL;
+
+		ASSERT(hole_em);
 		/*
-		 * when btrfs_get_extent can't find anything it
-		 * returns one huge hole
+		 * When btrfs_get_extent can't find anything it returns one
+		 * huge hole
 		 *
-		 * make sure what it found really fits our range, and
-		 * adjust to make sure it is based on the start from
-		 * the caller
+		 * Make sure what it found really fits our range, and adjust to
+		 * make sure it is based on the start from the caller
 		 */
-		if (hole_em) {
-			u64 calc_end = extent_map_end(hole_em);
-
-			if (calc_end <= start || (hole_em->start > end)) {
-				free_extent_map(hole_em);
-				hole_em = NULL;
-			} else {
-				hole_start = max(hole_em->start, start);
-				hole_len = calc_end - hole_start;
-			}
+		if (hole_end <= start || hole_em->start > end) {
+		       free_extent_map(hole_em);
+		       hole_em = NULL;
+		} else {
+		       hole_start = max(hole_em->start, start);
+		       hole_len = hole_end - hole_start;
 		}
-		em->bdev = NULL;
-		if (hole_em && range_start > hole_start) {
-			/* our hole starts before our delalloc, so we
-			 * have to return just the parts of the hole
-			 * that go until  the delalloc starts
+
+		if (hole_em && delalloc_start > hole_start) {
+			/*
+			 * Our hole starts before our delalloc, so we have to
+			 * return just the parts of the hole that go until the
+			 * delalloc starts
 			 */
-			em->len = min(hole_len,
-				      range_start - hole_start);
+			em->len = min(hole_len, delalloc_start - hole_start);
 			em->start = hole_start;
 			em->orig_start = hole_start;
 			/*
-			 * don't adjust block start at all,
-			 * it is fixed at EXTENT_MAP_HOLE
+			 * Don't adjust block start at all, it is fixed at
+			 * EXTENT_MAP_HOLE
 			 */
 			em->block_start = hole_em->block_start;
 			em->block_len = hole_len;
 			if (test_bit(EXTENT_FLAG_PREALLOC, &hole_em->flags))
 				set_bit(EXTENT_FLAG_PREALLOC, &em->flags);
 		} else {
-			em->start = range_start;
-			em->len = found;
-			em->orig_start = range_start;
+			/*
+			 * Hole is out of passed range or it starts after
+			 * delalloc range
+			 */
+			em->start = delalloc_start;
+			em->len = delalloc_len;
+			em->orig_start = delalloc_start;
 			em->block_start = EXTENT_MAP_DELALLOC;
-			em->block_len = found;
+			em->block_len = delalloc_len;
 		}
 	} else {
 		return hole_em;
@@ -7776,7 +7882,7 @@ static void btrfs_retry_endio_nocsum(struct bio *bio)
 	struct inode *inode = done->inode;
 	struct bio_vec *bvec;
 	struct extent_io_tree *io_tree, *failure_tree;
-	int i;
+	struct bvec_iter_all iter_all;
 
 	if (bio->bi_status)
 		goto end;
@@ -7788,7 +7894,7 @@ static void btrfs_retry_endio_nocsum(struct bio *bio)
 
 	done->uptodate = 1;
 	ASSERT(!bio_flagged(bio, BIO_CLONED));
-	bio_for_each_segment_all(bvec, bio, i)
+	bio_for_each_segment_all(bvec, bio, iter_all)
 		clean_io_failure(BTRFS_I(inode)->root->fs_info, failure_tree,
 				 io_tree, done->start, bvec->bv_page,
 				 btrfs_ino(BTRFS_I(inode)), 0);
@@ -7866,7 +7972,8 @@ static void btrfs_retry_endio(struct bio *bio)
 	struct bio_vec *bvec;
 	int uptodate;
 	int ret;
-	int i;
+	int i = 0;
+	struct bvec_iter_all iter_all;
 
 	if (bio->bi_status)
 		goto end;
@@ -7880,7 +7987,7 @@ static void btrfs_retry_endio(struct bio *bio)
 	failure_tree = &BTRFS_I(inode)->io_failure_tree;
 
 	ASSERT(!bio_flagged(bio, BIO_CLONED));
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 		ret = __readpage_endio_check(inode, io_bio, i, bvec->bv_page,
 					     bvec->bv_offset, done->start,
 					     bvec->bv_len);
@@ -7892,6 +7999,7 @@ static void btrfs_retry_endio(struct bio *bio)
 					 bvec->bv_offset);
 		else
 			uptodate = 0;
+		i++;
 	}
 
 	done->uptodate = uptodate;
@@ -9109,7 +9217,6 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
 	ei->index_cnt = (u64)-1;
 	ei->dir_index = 0;
 	ei->last_unlink_trans = 0;
-	ei->last_link_trans = 0;
 	ei->last_log_commit = 0;
 
 	spin_lock_init(&ei->lock);
@@ -9128,10 +9235,11 @@ struct inode *btrfs_alloc_inode(struct super_block *sb)
 
 	inode = &ei->vfs_inode;
 	extent_map_tree_init(&ei->extent_tree);
-	extent_io_tree_init(&ei->io_tree, inode);
-	extent_io_tree_init(&ei->io_failure_tree, inode);
-	ei->io_tree.track_uptodate = 1;
-	ei->io_failure_tree.track_uptodate = 1;
+	extent_io_tree_init(fs_info, &ei->io_tree, IO_TREE_INODE_IO, inode);
+	extent_io_tree_init(fs_info, &ei->io_failure_tree,
+			    IO_TREE_INODE_IO_FAILURE, inode);
+	ei->io_tree.track_uptodate = true;
+	ei->io_failure_tree.track_uptodate = true;
 	atomic_set(&ei->sync_writers, 0);
 	mutex_init(&ei->log_mutex);
 	mutex_init(&ei->delalloc_mutex);
@@ -9152,9 +9260,8 @@ void btrfs_test_destroy_inode(struct inode *inode)
 }
 #endif
 
-static void btrfs_i_callback(struct rcu_head *head)
+void btrfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(btrfs_inode_cachep, BTRFS_I(inode));
 }
 
@@ -9180,7 +9287,7 @@ void btrfs_destroy_inode(struct inode *inode)
 	 * created.
 	 */
 	if (!root)
-		goto free;
+		return;
 
 	while (1) {
 		ordered = btrfs_lookup_first_ordered_extent(inode, (u64)-1);
@@ -9198,8 +9305,6 @@ void btrfs_destroy_inode(struct inode *inode)
 	btrfs_qgroup_check_reserved_leak(inode);
 	inode_tree_del(inode);
 	btrfs_drop_extent_cache(BTRFS_I(inode), 0, (u64)-1, 0);
-free:
-	call_rcu(&inode->i_rcu, btrfs_i_callback);
 }
 
 int btrfs_drop_inode(struct inode *inode)
@@ -9376,7 +9481,7 @@ static int btrfs_rename_exchange(struct inode *old_dir,
 	/* Reference for the source. */
 	if (old_ino == BTRFS_FIRST_FREE_OBJECTID) {
 		/* force full log commit if subvolume involved. */
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 	} else {
 		btrfs_pin_log_trans(root);
 		root_log_pinned = true;
@@ -9393,7 +9498,7 @@ static int btrfs_rename_exchange(struct inode *old_dir,
 	/* And now for the dest. */
 	if (new_ino == BTRFS_FIRST_FREE_OBJECTID) {
 		/* force full log commit if subvolume involved. */
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 	} else {
 		btrfs_pin_log_trans(dest);
 		dest_log_pinned = true;
@@ -9529,7 +9634,7 @@ out_fail:
 		    btrfs_inode_in_log(BTRFS_I(old_inode), fs_info->generation) ||
 		    (new_inode &&
 		     btrfs_inode_in_log(BTRFS_I(new_inode), fs_info->generation)))
-			btrfs_set_log_full_commit(fs_info, trans);
+			btrfs_set_log_full_commit(trans);
 
 		if (root_log_pinned) {
 			btrfs_end_log_trans(root);
@@ -9715,7 +9820,7 @@ static int btrfs_rename(struct inode *old_dir, struct dentry *old_dentry,
 	BTRFS_I(old_inode)->dir_index = 0ULL;
 	if (unlikely(old_ino == BTRFS_FIRST_FREE_OBJECTID)) {
 		/* force full log commit if subvolume involved. */
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 	} else {
 		btrfs_pin_log_trans(root);
 		log_pinned = true;
@@ -9836,7 +9941,7 @@ out_fail:
 		    btrfs_inode_in_log(BTRFS_I(old_inode), fs_info->generation) ||
 		    (new_inode &&
 		     btrfs_inode_in_log(BTRFS_I(new_inode), fs_info->generation)))
-			btrfs_set_log_full_commit(fs_info, trans);
+			btrfs_set_log_full_commit(trans);
 
 		btrfs_end_log_trans(root);
 		log_pinned = false;
@@ -9910,7 +10015,6 @@ static struct btrfs_delalloc_work *btrfs_alloc_delalloc_work(struct inode *inode
 	init_completion(&work->completion);
 	INIT_LIST_HEAD(&work->list);
 	work->inode = inode;
-	WARN_ON_ONCE(!inode);
 	btrfs_init_work(&work->work, btrfs_flush_delalloc_helper,
 			btrfs_run_delalloc_work, NULL, NULL);
 
@@ -10140,7 +10244,6 @@ static int btrfs_symlink(struct inode *dir, struct dentry *dentry,
 
 	inode->i_op = &btrfs_symlink_inode_operations;
 	inode_nohighmem(inode);
-	inode->i_mapping->a_ops = &btrfs_aops;
 	inode_set_bytes(inode, name_len);
 	btrfs_i_size_write(BTRFS_I(inode), name_len);
 	err = btrfs_update_inode(trans, root, inode);
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 9c8e1734429c..cfeff1b8dce0 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -189,9 +189,8 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
 	struct btrfs_trans_handle *trans;
 	unsigned int fsflags, old_fsflags;
 	int ret;
-	u64 old_flags;
-	unsigned int old_i_flags;
-	umode_t mode;
+	const char *comp = NULL;
+	u32 binode_flags = binode->flags;
 
 	if (!inode_owner_or_capable(inode))
 		return -EPERM;
@@ -212,66 +211,59 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
 
 	inode_lock(inode);
 
-	old_flags = binode->flags;
-	old_i_flags = inode->i_flags;
-	mode = inode->i_mode;
-
 	fsflags = btrfs_mask_fsflags_for_type(inode, fsflags);
 	old_fsflags = btrfs_inode_flags_to_fsflags(binode->flags);
-	if ((fsflags ^ old_fsflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
-		if (!capable(CAP_LINUX_IMMUTABLE)) {
-			ret = -EPERM;
-			goto out_unlock;
-		}
-	}
+	ret = vfs_ioc_setflags_prepare(inode, old_fsflags, fsflags);
+	if (ret)
+		goto out_unlock;
 
 	if (fsflags & FS_SYNC_FL)
-		binode->flags |= BTRFS_INODE_SYNC;
+		binode_flags |= BTRFS_INODE_SYNC;
 	else
-		binode->flags &= ~BTRFS_INODE_SYNC;
+		binode_flags &= ~BTRFS_INODE_SYNC;
 	if (fsflags & FS_IMMUTABLE_FL)
-		binode->flags |= BTRFS_INODE_IMMUTABLE;
+		binode_flags |= BTRFS_INODE_IMMUTABLE;
 	else
-		binode->flags &= ~BTRFS_INODE_IMMUTABLE;
+		binode_flags &= ~BTRFS_INODE_IMMUTABLE;
 	if (fsflags & FS_APPEND_FL)
-		binode->flags |= BTRFS_INODE_APPEND;
+		binode_flags |= BTRFS_INODE_APPEND;
 	else
-		binode->flags &= ~BTRFS_INODE_APPEND;
+		binode_flags &= ~BTRFS_INODE_APPEND;
 	if (fsflags & FS_NODUMP_FL)
-		binode->flags |= BTRFS_INODE_NODUMP;
+		binode_flags |= BTRFS_INODE_NODUMP;
 	else
-		binode->flags &= ~BTRFS_INODE_NODUMP;
+		binode_flags &= ~BTRFS_INODE_NODUMP;
 	if (fsflags & FS_NOATIME_FL)
-		binode->flags |= BTRFS_INODE_NOATIME;
+		binode_flags |= BTRFS_INODE_NOATIME;
 	else
-		binode->flags &= ~BTRFS_INODE_NOATIME;
+		binode_flags &= ~BTRFS_INODE_NOATIME;
 	if (fsflags & FS_DIRSYNC_FL)
-		binode->flags |= BTRFS_INODE_DIRSYNC;
+		binode_flags |= BTRFS_INODE_DIRSYNC;
 	else
-		binode->flags &= ~BTRFS_INODE_DIRSYNC;
+		binode_flags &= ~BTRFS_INODE_DIRSYNC;
 	if (fsflags & FS_NOCOW_FL) {
-		if (S_ISREG(mode)) {
+		if (S_ISREG(inode->i_mode)) {
 			/*
 			 * It's safe to turn csums off here, no extents exist.
 			 * Otherwise we want the flag to reflect the real COW
 			 * status of the file and will not set it.
 			 */
 			if (inode->i_size == 0)
-				binode->flags |= BTRFS_INODE_NODATACOW
-					      | BTRFS_INODE_NODATASUM;
+				binode_flags |= BTRFS_INODE_NODATACOW |
+						BTRFS_INODE_NODATASUM;
 		} else {
-			binode->flags |= BTRFS_INODE_NODATACOW;
+			binode_flags |= BTRFS_INODE_NODATACOW;
 		}
 	} else {
 		/*
 		 * Revert back under same assumptions as above
 		 */
-		if (S_ISREG(mode)) {
+		if (S_ISREG(inode->i_mode)) {
 			if (inode->i_size == 0)
-				binode->flags &= ~(BTRFS_INODE_NODATACOW
-				             | BTRFS_INODE_NODATASUM);
+				binode_flags &= ~(BTRFS_INODE_NODATACOW |
+						  BTRFS_INODE_NODATASUM);
 		} else {
-			binode->flags &= ~BTRFS_INODE_NODATACOW;
+			binode_flags &= ~BTRFS_INODE_NODATACOW;
 		}
 	}
 
@@ -281,57 +273,59 @@ static int btrfs_ioctl_setflags(struct file *file, void __user *arg)
 	 * things smaller.
 	 */
 	if (fsflags & FS_NOCOMP_FL) {
-		binode->flags &= ~BTRFS_INODE_COMPRESS;
-		binode->flags |= BTRFS_INODE_NOCOMPRESS;
-
-		ret = btrfs_set_prop(inode, "btrfs.compression", NULL, 0, 0);
-		if (ret && ret != -ENODATA)
-			goto out_drop;
+		binode_flags &= ~BTRFS_INODE_COMPRESS;
+		binode_flags |= BTRFS_INODE_NOCOMPRESS;
 	} else if (fsflags & FS_COMPR_FL) {
-		const char *comp;
 
 		if (IS_SWAPFILE(inode)) {
 			ret = -ETXTBSY;
 			goto out_unlock;
 		}
 
-		binode->flags |= BTRFS_INODE_COMPRESS;
-		binode->flags &= ~BTRFS_INODE_NOCOMPRESS;
+		binode_flags |= BTRFS_INODE_COMPRESS;
+		binode_flags &= ~BTRFS_INODE_NOCOMPRESS;
 
 		comp = btrfs_compress_type2str(fs_info->compress_type);
 		if (!comp || comp[0] == 0)
 			comp = btrfs_compress_type2str(BTRFS_COMPRESS_ZLIB);
-
-		ret = btrfs_set_prop(inode, "btrfs.compression",
-				     comp, strlen(comp), 0);
-		if (ret)
-			goto out_drop;
-
 	} else {
-		ret = btrfs_set_prop(inode, "btrfs.compression", NULL, 0, 0);
-		if (ret && ret != -ENODATA)
-			goto out_drop;
-		binode->flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS);
+		binode_flags &= ~(BTRFS_INODE_COMPRESS | BTRFS_INODE_NOCOMPRESS);
 	}
 
-	trans = btrfs_start_transaction(root, 1);
+	/*
+	 * 1 for inode item
+	 * 2 for properties
+	 */
+	trans = btrfs_start_transaction(root, 3);
 	if (IS_ERR(trans)) {
 		ret = PTR_ERR(trans);
-		goto out_drop;
+		goto out_unlock;
 	}
 
+	if (comp) {
+		ret = btrfs_set_prop(trans, inode, "btrfs.compression", comp,
+				     strlen(comp), 0);
+		if (ret) {
+			btrfs_abort_transaction(trans, ret);
+			goto out_end_trans;
+		}
+	} else {
+		ret = btrfs_set_prop(trans, inode, "btrfs.compression", NULL,
+				     0, 0);
+		if (ret && ret != -ENODATA) {
+			btrfs_abort_transaction(trans, ret);
+			goto out_end_trans;
+		}
+	}
+
+	binode->flags = binode_flags;
 	btrfs_sync_inode_flags_to_i_flags(inode);
 	inode_inc_iversion(inode);
 	inode->i_ctime = current_time(inode);
 	ret = btrfs_update_inode(trans, root, inode);
 
+ out_end_trans:
 	btrfs_end_transaction(trans);
- out_drop:
-	if (ret) {
-		binode->flags = old_flags;
-		inode->i_flags = old_i_flags;
-	}
-
  out_unlock:
 	inode_unlock(inode);
 	mnt_drop_write_file(file);
@@ -379,9 +373,7 @@ static int btrfs_ioctl_fsgetxattr(struct file *file, void __user *arg)
 	struct btrfs_inode *binode = BTRFS_I(file_inode(file));
 	struct fsxattr fa;
 
-	memset(&fa, 0, sizeof(fa));
-	fa.fsx_xflags = btrfs_inode_flags_to_xflags(binode->flags);
-
+	simple_fill_fsxattr(&fa, btrfs_inode_flags_to_xflags(binode->flags));
 	if (copy_to_user(arg, &fa, sizeof(fa)))
 		return -EFAULT;
 
@@ -394,7 +386,7 @@ static int btrfs_ioctl_fssetxattr(struct file *file, void __user *arg)
 	struct btrfs_inode *binode = BTRFS_I(inode);
 	struct btrfs_root *root = binode->root;
 	struct btrfs_trans_handle *trans;
-	struct fsxattr fa;
+	struct fsxattr fa, old_fa;
 	unsigned old_flags;
 	unsigned old_i_flags;
 	int ret = 0;
@@ -405,7 +397,6 @@ static int btrfs_ioctl_fssetxattr(struct file *file, void __user *arg)
 	if (btrfs_root_readonly(root))
 		return -EROFS;
 
-	memset(&fa, 0, sizeof(fa));
 	if (copy_from_user(&fa, arg, sizeof(fa)))
 		return -EFAULT;
 
@@ -425,13 +416,11 @@ static int btrfs_ioctl_fssetxattr(struct file *file, void __user *arg)
 	old_flags = binode->flags;
 	old_i_flags = inode->i_flags;
 
-	/* We need the capabilities to change append-only or immutable inode */
-	if (((old_flags & (BTRFS_INODE_APPEND | BTRFS_INODE_IMMUTABLE)) ||
-	     (fa.fsx_xflags & (FS_XFLAG_APPEND | FS_XFLAG_IMMUTABLE))) &&
-	    !capable(CAP_LINUX_IMMUTABLE)) {
-		ret = -EPERM;
+	simple_fill_fsxattr(&old_fa,
+			    btrfs_inode_flags_to_xflags(binode->flags));
+	ret = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
+	if (ret)
 		goto out_unlock;
-	}
 
 	if (fa.fsx_xflags & FS_XFLAG_SYNC)
 		binode->flags |= BTRFS_INODE_SYNC;
@@ -501,6 +490,16 @@ static noinline int btrfs_ioctl_fitrim(struct file *file, void __user *arg)
 	if (!capable(CAP_SYS_ADMIN))
 		return -EPERM;
 
+	/*
+	 * If the fs is mounted with nologreplay, which requires it to be
+	 * mounted in RO mode as well, we can not allow discard on free space
+	 * inside block groups, because log trees refer to extents that are not
+	 * pinned in a block group's free space cache (pinning the extents is
+	 * precisely the first phase of replaying a log tree).
+	 */
+	if (btrfs_test_opt(fs_info, NOLOGREPLAY))
+		return -EROFS;
+
 	rcu_read_lock();
 	list_for_each_entry_rcu(device, &fs_info->fs_devices->devices,
 				dev_list) {
@@ -1642,7 +1641,7 @@ static noinline int btrfs_ioctl_resize(struct file *file,
 		btrfs_info(fs_info, "resizing devid %llu", devid);
 	}
 
-	device = btrfs_find_device(fs_info, devid, NULL, NULL);
+	device = btrfs_find_device(fs_info->fs_devices, devid, NULL, NULL, true);
 	if (!device) {
 		btrfs_info(fs_info, "resizer unable to find device %llu",
 			   devid);
@@ -2921,8 +2920,10 @@ static noinline int btrfs_ioctl_snap_destroy(struct file *file,
 	inode_lock(inode);
 	err = btrfs_delete_subvolume(dir, dentry);
 	inode_unlock(inode);
-	if (!err)
+	if (!err) {
+		fsnotify_rmdir(dir, dentry);
 		d_delete(dentry);
+	}
 
 out_dput:
 	dput(dentry);
@@ -3178,7 +3179,8 @@ static long btrfs_ioctl_dev_info(struct btrfs_fs_info *fs_info,
 		s_uuid = di_args->uuid;
 
 	rcu_read_lock();
-	dev = btrfs_find_device(fs_info, di_args->devid, s_uuid, NULL);
+	dev = btrfs_find_device(fs_info->fs_devices, di_args->devid, s_uuid,
+				NULL, true);
 
 	if (!dev) {
 		ret = -ENODEV;
@@ -3206,21 +3208,6 @@ out:
 	return ret;
 }
 
-static void btrfs_double_inode_unlock(struct inode *inode1, struct inode *inode2)
-{
-	inode_unlock(inode1);
-	inode_unlock(inode2);
-}
-
-static void btrfs_double_inode_lock(struct inode *inode1, struct inode *inode2)
-{
-	if (inode1 < inode2)
-		swap(inode1, inode2);
-
-	inode_lock_nested(inode1, I_MUTEX_PARENT);
-	inode_lock_nested(inode2, I_MUTEX_CHILD);
-}
-
 static void btrfs_double_extent_unlock(struct inode *inode1, u64 loff1,
 				       struct inode *inode2, u64 loff2, u64 len)
 {
@@ -3241,32 +3228,17 @@ static void btrfs_double_extent_lock(struct inode *inode1, u64 loff1,
 	lock_extent(&BTRFS_I(inode2)->io_tree, loff2, loff2 + len - 1);
 }
 
-static int btrfs_extent_same_range(struct inode *src, u64 loff, u64 olen,
+static int btrfs_extent_same_range(struct inode *src, u64 loff, u64 len,
 				   struct inode *dst, u64 dst_loff)
 {
-	u64 bs = BTRFS_I(src)->root->fs_info->sb->s_blocksize;
 	int ret;
-	u64 len = olen;
-
-	if (loff + len == src->i_size)
-		len = ALIGN(src->i_size, bs) - loff;
-	/*
-	 * For same inode case we don't want our length pushed out past i_size
-	 * as comparing that data range makes no sense.
-	 *
-	 * This effectively means we require aligned extents for the single
-	 * inode case, whereas the other cases allow an unaligned length so long
-	 * as it ends at i_size.
-	 */
-	if (dst == src && len != olen)
-		return -EINVAL;
 
 	/*
 	 * Lock destination range to serialize with concurrent readpages() and
 	 * source range to serialize with relocation.
 	 */
 	btrfs_double_extent_lock(src, loff, dst, dst_loff, len);
-	ret = btrfs_clone(src, dst, loff, olen, len, dst_loff, 1);
+	ret = btrfs_clone(src, dst, loff, len, len, dst_loff, 1);
 	btrfs_double_extent_unlock(src, loff, dst, dst_loff, len);
 
 	return ret;
@@ -3278,27 +3250,29 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
 			     struct inode *dst, u64 dst_loff)
 {
 	int ret;
-	int num_pages = PAGE_ALIGN(BTRFS_MAX_DEDUPE_LEN) >> PAGE_SHIFT;
 	u64 i, tail_len, chunk_count;
+	struct btrfs_root *root_dst = BTRFS_I(dst)->root;
 
-	/* don't make the dst file partly checksummed */
-	if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) !=
-	    (BTRFS_I(dst)->flags & BTRFS_INODE_NODATASUM))
-		return -EINVAL;
-
-	if (IS_SWAPFILE(src) || IS_SWAPFILE(dst))
-		return -ETXTBSY;
+	spin_lock(&root_dst->root_item_lock);
+	if (root_dst->send_in_progress) {
+		btrfs_warn_rl(root_dst->fs_info,
+"cannot deduplicate to root %llu while send operations are using it (%d in progress)",
+			      root_dst->root_key.objectid,
+			      root_dst->send_in_progress);
+		spin_unlock(&root_dst->root_item_lock);
+		return -EAGAIN;
+	}
+	root_dst->dedupe_in_progress++;
+	spin_unlock(&root_dst->root_item_lock);
 
 	tail_len = olen % BTRFS_MAX_DEDUPE_LEN;
 	chunk_count = div_u64(olen, BTRFS_MAX_DEDUPE_LEN);
-	if (chunk_count == 0)
-		num_pages = PAGE_ALIGN(tail_len) >> PAGE_SHIFT;
 
 	for (i = 0; i < chunk_count; i++) {
 		ret = btrfs_extent_same_range(src, loff, BTRFS_MAX_DEDUPE_LEN,
 					      dst, dst_loff);
 		if (ret)
-			return ret;
+			goto out;
 
 		loff += BTRFS_MAX_DEDUPE_LEN;
 		dst_loff += BTRFS_MAX_DEDUPE_LEN;
@@ -3307,6 +3281,10 @@ static int btrfs_extent_same(struct inode *src, u64 loff, u64 olen,
 	if (tail_len > 0)
 		ret = btrfs_extent_same_range(src, loff, tail_len, dst,
 					      dst_loff);
+out:
+	spin_lock(&root_dst->root_item_lock);
+	root_dst->dedupe_in_progress--;
+	spin_unlock(&root_dst->root_item_lock);
 
 	return ret;
 }
@@ -3765,13 +3743,16 @@ process_slot:
 								datal);
 
 				if (disko) {
+					struct btrfs_ref ref = { 0 };
 					inode_add_bytes(inode, datal);
-					ret = btrfs_inc_extent_ref(trans,
-							root,
-							disko, diskl, 0,
-							root->root_key.objectid,
-							btrfs_ino(BTRFS_I(inode)),
-							new_key.offset - datao);
+					btrfs_init_generic_ref(&ref,
+						BTRFS_ADD_DELAYED_REF, disko,
+						diskl, 0);
+					btrfs_init_data_ref(&ref,
+						root->root_key.objectid,
+						btrfs_ino(BTRFS_I(inode)),
+						new_key.offset - datao);
+					ret = btrfs_inc_extent_ref(trans, &ref);
 					if (ret) {
 						btrfs_abort_transaction(trans,
 									ret);
@@ -3908,14 +3889,6 @@ static noinline int btrfs_clone_files(struct file *file, struct file *file_src,
 	 *   be either compressed or non-compressed.
 	 */
 
-	/* don't make the dst file partly checksummed */
-	if ((BTRFS_I(src)->flags & BTRFS_INODE_NODATASUM) !=
-	    (BTRFS_I(inode)->flags & BTRFS_INODE_NODATASUM))
-		return -EINVAL;
-
-	if (IS_SWAPFILE(src) || IS_SWAPFILE(inode))
-		return -ETXTBSY;
-
 	/*
 	 * VFS's generic_remap_file_range_prep() protects us from cloning the
 	 * eof block into the middle of a file, which would result in corruption
@@ -3986,10 +3959,11 @@ static int btrfs_remap_file_range_prep(struct file *file_in, loff_t pos_in,
 			return -EXDEV;
 	}
 
-	if (same_inode)
-		inode_lock(inode_in);
-	else
-		btrfs_double_inode_lock(inode_in, inode_out);
+	/* don't make the dst file partly checksummed */
+	if ((BTRFS_I(inode_in)->flags & BTRFS_INODE_NODATASUM) !=
+	    (BTRFS_I(inode_out)->flags & BTRFS_INODE_NODATASUM)) {
+		return -EINVAL;
+	}
 
 	/*
 	 * Now that the inodes are locked, we need to start writeback ourselves
@@ -4022,26 +3996,14 @@ static int btrfs_remap_file_range_prep(struct file *file_in, loff_t pos_in,
 	ret = btrfs_wait_ordered_range(inode_in, ALIGN_DOWN(pos_in, bs),
 				       wb_len);
 	if (ret < 0)
-		goto out_unlock;
+		return ret;
 	ret = btrfs_wait_ordered_range(inode_out, ALIGN_DOWN(pos_out, bs),
 				       wb_len);
 	if (ret < 0)
-		goto out_unlock;
+		return ret;
 
-	ret = generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
+	return generic_remap_file_range_prep(file_in, pos_in, file_out, pos_out,
 					    len, remap_flags);
-	if (ret < 0 || *len == 0)
-		goto out_unlock;
-
-	return 0;
-
- out_unlock:
-	if (same_inode)
-		inode_unlock(inode_in);
-	else
-		btrfs_double_inode_unlock(inode_in, inode_out);
-
-	return ret;
 }
 
 loff_t btrfs_remap_file_range(struct file *src_file, loff_t off,
@@ -4056,20 +4018,26 @@ loff_t btrfs_remap_file_range(struct file *src_file, loff_t off,
 	if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
 		return -EINVAL;
 
+	if (same_inode)
+		inode_lock(src_inode);
+	else
+		lock_two_nondirectories(src_inode, dst_inode);
+
 	ret = btrfs_remap_file_range_prep(src_file, off, dst_file, destoff,
 					  &len, remap_flags);
 	if (ret < 0 || len == 0)
-		return ret;
+		goto out_unlock;
 
 	if (remap_flags & REMAP_FILE_DEDUP)
 		ret = btrfs_extent_same(src_inode, off, len, dst_inode, destoff);
 	else
 		ret = btrfs_clone_files(dst_file, src_file, off, len, destoff);
 
+out_unlock:
 	if (same_inode)
 		inode_unlock(src_inode);
 	else
-		btrfs_double_inode_unlock(src_inode, dst_inode);
+		unlock_two_nondirectories(src_inode, dst_inode);
 
 	return ret < 0 ? ret : len;
 }
@@ -4381,7 +4349,7 @@ static long btrfs_ioctl_scrub(struct file *file, void __user *arg)
 			      &sa->progress, sa->flags & BTRFS_SCRUB_READONLY,
 			      0);
 
-	if (copy_to_user(arg, sa, sizeof(*sa)))
+	if (ret == 0 && copy_to_user(arg, sa, sizeof(*sa)))
 		ret = -EFAULT;
 
 	if (!(sa->flags & BTRFS_SCRUB_READONLY))
@@ -4414,7 +4382,7 @@ static long btrfs_ioctl_scrub_progress(struct btrfs_fs_info *fs_info,
 
 	ret = btrfs_scrub_progress(fs_info, sa->devid, &sa->progress);
 
-	if (copy_to_user(arg, sa, sizeof(*sa)))
+	if (ret == 0 && copy_to_user(arg, sa, sizeof(*sa)))
 		ret = -EFAULT;
 
 	kfree(sa);
@@ -4438,7 +4406,7 @@ static long btrfs_ioctl_get_dev_stats(struct btrfs_fs_info *fs_info,
 
 	ret = btrfs_get_dev_stats(fs_info, sa);
 
-	if (copy_to_user(arg, sa, sizeof(*sa)))
+	if (ret == 0 && copy_to_user(arg, sa, sizeof(*sa)))
 		ret = -EFAULT;
 
 	kfree(sa);
@@ -4484,7 +4452,7 @@ static long btrfs_ioctl_dev_replace(struct btrfs_fs_info *fs_info,
 		break;
 	}
 
-	if (copy_to_user(arg, p, sizeof(*p)))
+	if ((ret == 0 || ret == -ECANCELED) && copy_to_user(arg, p, sizeof(*p)))
 		ret = -EFAULT;
 out:
 	kfree(p);
@@ -4790,7 +4758,7 @@ do_balance:
 	ret = btrfs_balance(fs_info, bctl, bargs);
 	bctl = NULL;
 
-	if (arg) {
+	if ((ret == 0 || ret == -ECANCELED) && arg) {
 		if (copy_to_user(arg, bargs, sizeof(*bargs)))
 			ret = -EFAULT;
 	}
diff --git a/fs/btrfs/locking.c b/fs/btrfs/locking.c
index 1da768e5ef75..2f6c3c7851ed 100644
--- a/fs/btrfs/locking.c
+++ b/fs/btrfs/locking.c
@@ -12,46 +12,134 @@
 #include "extent_io.h"
 #include "locking.h"
 
-static void btrfs_assert_tree_read_locked(struct extent_buffer *eb);
+#ifdef CONFIG_BTRFS_DEBUG
+static void btrfs_assert_spinning_writers_get(struct extent_buffer *eb)
+{
+	WARN_ON(atomic_read(&eb->spinning_writers));
+	atomic_inc(&eb->spinning_writers);
+}
 
-/*
- * if we currently have a spinning reader or writer lock
- * (indicated by the rw flag) this will bump the count
- * of blocking holders and drop the spinlock.
- */
-void btrfs_set_lock_blocking_rw(struct extent_buffer *eb, int rw)
+static void btrfs_assert_spinning_writers_put(struct extent_buffer *eb)
+{
+	WARN_ON(atomic_read(&eb->spinning_writers) != 1);
+	atomic_dec(&eb->spinning_writers);
+}
+
+static void btrfs_assert_no_spinning_writers(struct extent_buffer *eb)
+{
+	WARN_ON(atomic_read(&eb->spinning_writers));
+}
+
+static void btrfs_assert_spinning_readers_get(struct extent_buffer *eb)
+{
+	atomic_inc(&eb->spinning_readers);
+}
+
+static void btrfs_assert_spinning_readers_put(struct extent_buffer *eb)
+{
+	WARN_ON(atomic_read(&eb->spinning_readers) == 0);
+	atomic_dec(&eb->spinning_readers);
+}
+
+static void btrfs_assert_tree_read_locks_get(struct extent_buffer *eb)
 {
+	atomic_inc(&eb->read_locks);
+}
+
+static void btrfs_assert_tree_read_locks_put(struct extent_buffer *eb)
+{
+	atomic_dec(&eb->read_locks);
+}
+
+static void btrfs_assert_tree_read_locked(struct extent_buffer *eb)
+{
+	BUG_ON(!atomic_read(&eb->read_locks));
+}
+
+static void btrfs_assert_tree_write_locks_get(struct extent_buffer *eb)
+{
+	atomic_inc(&eb->write_locks);
+}
+
+static void btrfs_assert_tree_write_locks_put(struct extent_buffer *eb)
+{
+	atomic_dec(&eb->write_locks);
+}
+
+void btrfs_assert_tree_locked(struct extent_buffer *eb)
+{
+	BUG_ON(!atomic_read(&eb->write_locks));
+}
+
+#else
+static void btrfs_assert_spinning_writers_get(struct extent_buffer *eb) { }
+static void btrfs_assert_spinning_writers_put(struct extent_buffer *eb) { }
+static void btrfs_assert_no_spinning_writers(struct extent_buffer *eb) { }
+static void btrfs_assert_spinning_readers_put(struct extent_buffer *eb) { }
+static void btrfs_assert_spinning_readers_get(struct extent_buffer *eb) { }
+static void btrfs_assert_tree_read_locked(struct extent_buffer *eb) { }
+static void btrfs_assert_tree_read_locks_get(struct extent_buffer *eb) { }
+static void btrfs_assert_tree_read_locks_put(struct extent_buffer *eb) { }
+void btrfs_assert_tree_locked(struct extent_buffer *eb) { }
+static void btrfs_assert_tree_write_locks_get(struct extent_buffer *eb) { }
+static void btrfs_assert_tree_write_locks_put(struct extent_buffer *eb) { }
+#endif
+
+void btrfs_set_lock_blocking_read(struct extent_buffer *eb)
+{
+	trace_btrfs_set_lock_blocking_read(eb);
 	/*
-	 * no lock is required.  The lock owner may change if
-	 * we have a read lock, but it won't change to or away
-	 * from us.  If we have the write lock, we are the owner
-	 * and it'll never change.
+	 * No lock is required.  The lock owner may change if we have a read
+	 * lock, but it won't change to or away from us.  If we have the write
+	 * lock, we are the owner and it'll never change.
 	 */
 	if (eb->lock_nested && current->pid == eb->lock_owner)
 		return;
-	if (rw == BTRFS_WRITE_LOCK) {
-		if (atomic_read(&eb->blocking_writers) == 0) {
-			WARN_ON(atomic_read(&eb->spinning_writers) != 1);
-			atomic_dec(&eb->spinning_writers);
-			btrfs_assert_tree_locked(eb);
-			atomic_inc(&eb->blocking_writers);
-			write_unlock(&eb->lock);
-		}
-	} else if (rw == BTRFS_READ_LOCK) {
-		btrfs_assert_tree_read_locked(eb);
-		atomic_inc(&eb->blocking_readers);
-		WARN_ON(atomic_read(&eb->spinning_readers) == 0);
-		atomic_dec(&eb->spinning_readers);
-		read_unlock(&eb->lock);
+	btrfs_assert_tree_read_locked(eb);
+	atomic_inc(&eb->blocking_readers);
+	btrfs_assert_spinning_readers_put(eb);
+	read_unlock(&eb->lock);
+}
+
+void btrfs_set_lock_blocking_write(struct extent_buffer *eb)
+{
+	trace_btrfs_set_lock_blocking_write(eb);
+	/*
+	 * No lock is required.  The lock owner may change if we have a read
+	 * lock, but it won't change to or away from us.  If we have the write
+	 * lock, we are the owner and it'll never change.
+	 */
+	if (eb->lock_nested && current->pid == eb->lock_owner)
+		return;
+	if (atomic_read(&eb->blocking_writers) == 0) {
+		btrfs_assert_spinning_writers_put(eb);
+		btrfs_assert_tree_locked(eb);
+		atomic_inc(&eb->blocking_writers);
+		write_unlock(&eb->lock);
 	}
 }
 
-/*
- * if we currently have a blocking lock, take the spinlock
- * and drop our blocking count
- */
-void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw)
+void btrfs_clear_lock_blocking_read(struct extent_buffer *eb)
 {
+	trace_btrfs_clear_lock_blocking_read(eb);
+	/*
+	 * No lock is required.  The lock owner may change if we have a read
+	 * lock, but it won't change to or away from us.  If we have the write
+	 * lock, we are the owner and it'll never change.
+	 */
+	if (eb->lock_nested && current->pid == eb->lock_owner)
+		return;
+	BUG_ON(atomic_read(&eb->blocking_readers) == 0);
+	read_lock(&eb->lock);
+	btrfs_assert_spinning_readers_get(eb);
+	/* atomic_dec_and_test implies a barrier */
+	if (atomic_dec_and_test(&eb->blocking_readers))
+		cond_wake_up_nomb(&eb->read_lock_wq);
+}
+
+void btrfs_clear_lock_blocking_write(struct extent_buffer *eb)
+{
+	trace_btrfs_clear_lock_blocking_write(eb);
 	/*
 	 * no lock is required.  The lock owner may change if
 	 * we have a read lock, but it won't change to or away
@@ -60,23 +148,12 @@ void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw)
 	 */
 	if (eb->lock_nested && current->pid == eb->lock_owner)
 		return;
-
-	if (rw == BTRFS_WRITE_LOCK_BLOCKING) {
-		BUG_ON(atomic_read(&eb->blocking_writers) != 1);
-		write_lock(&eb->lock);
-		WARN_ON(atomic_read(&eb->spinning_writers));
-		atomic_inc(&eb->spinning_writers);
-		/* atomic_dec_and_test implies a barrier */
-		if (atomic_dec_and_test(&eb->blocking_writers))
-			cond_wake_up_nomb(&eb->write_lock_wq);
-	} else if (rw == BTRFS_READ_LOCK_BLOCKING) {
-		BUG_ON(atomic_read(&eb->blocking_readers) == 0);
-		read_lock(&eb->lock);
-		atomic_inc(&eb->spinning_readers);
-		/* atomic_dec_and_test implies a barrier */
-		if (atomic_dec_and_test(&eb->blocking_readers))
-			cond_wake_up_nomb(&eb->read_lock_wq);
-	}
+	BUG_ON(atomic_read(&eb->blocking_writers) != 1);
+	write_lock(&eb->lock);
+	btrfs_assert_spinning_writers_get(eb);
+	/* atomic_dec_and_test implies a barrier */
+	if (atomic_dec_and_test(&eb->blocking_writers))
+		cond_wake_up_nomb(&eb->write_lock_wq);
 }
 
 /*
@@ -85,6 +162,10 @@ void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw)
  */
 void btrfs_tree_read_lock(struct extent_buffer *eb)
 {
+	u64 start_ns = 0;
+
+	if (trace_btrfs_tree_read_lock_enabled())
+		start_ns = ktime_get_ns();
 again:
 	BUG_ON(!atomic_read(&eb->blocking_writers) &&
 	       current->pid == eb->lock_owner);
@@ -99,8 +180,9 @@ again:
 		 * called on a partly (write-)locked tree.
 		 */
 		BUG_ON(eb->lock_nested);
-		eb->lock_nested = 1;
+		eb->lock_nested = true;
 		read_unlock(&eb->lock);
+		trace_btrfs_tree_read_lock(eb, start_ns);
 		return;
 	}
 	if (atomic_read(&eb->blocking_writers)) {
@@ -109,8 +191,9 @@ again:
 			   atomic_read(&eb->blocking_writers) == 0);
 		goto again;
 	}
-	atomic_inc(&eb->read_locks);
-	atomic_inc(&eb->spinning_readers);
+	btrfs_assert_tree_read_locks_get(eb);
+	btrfs_assert_spinning_readers_get(eb);
+	trace_btrfs_tree_read_lock(eb, start_ns);
 }
 
 /*
@@ -128,8 +211,9 @@ int btrfs_tree_read_lock_atomic(struct extent_buffer *eb)
 		read_unlock(&eb->lock);
 		return 0;
 	}
-	atomic_inc(&eb->read_locks);
-	atomic_inc(&eb->spinning_readers);
+	btrfs_assert_tree_read_locks_get(eb);
+	btrfs_assert_spinning_readers_get(eb);
+	trace_btrfs_tree_read_lock_atomic(eb);
 	return 1;
 }
 
@@ -149,8 +233,9 @@ int btrfs_try_tree_read_lock(struct extent_buffer *eb)
 		read_unlock(&eb->lock);
 		return 0;
 	}
-	atomic_inc(&eb->read_locks);
-	atomic_inc(&eb->spinning_readers);
+	btrfs_assert_tree_read_locks_get(eb);
+	btrfs_assert_spinning_readers_get(eb);
+	trace_btrfs_try_tree_read_lock(eb);
 	return 1;
 }
 
@@ -170,9 +255,10 @@ int btrfs_try_tree_write_lock(struct extent_buffer *eb)
 		write_unlock(&eb->lock);
 		return 0;
 	}
-	atomic_inc(&eb->write_locks);
-	atomic_inc(&eb->spinning_writers);
+	btrfs_assert_tree_write_locks_get(eb);
+	btrfs_assert_spinning_writers_get(eb);
 	eb->lock_owner = current->pid;
+	trace_btrfs_try_tree_write_lock(eb);
 	return 1;
 }
 
@@ -181,6 +267,7 @@ int btrfs_try_tree_write_lock(struct extent_buffer *eb)
  */
 void btrfs_tree_read_unlock(struct extent_buffer *eb)
 {
+	trace_btrfs_tree_read_unlock(eb);
 	/*
 	 * if we're nested, we have the write lock.  No new locking
 	 * is needed as long as we are the lock owner.
@@ -188,13 +275,12 @@ void btrfs_tree_read_unlock(struct extent_buffer *eb)
 	 * field only matters to the lock owner.
 	 */
 	if (eb->lock_nested && current->pid == eb->lock_owner) {
-		eb->lock_nested = 0;
+		eb->lock_nested = false;
 		return;
 	}
 	btrfs_assert_tree_read_locked(eb);
-	WARN_ON(atomic_read(&eb->spinning_readers) == 0);
-	atomic_dec(&eb->spinning_readers);
-	atomic_dec(&eb->read_locks);
+	btrfs_assert_spinning_readers_put(eb);
+	btrfs_assert_tree_read_locks_put(eb);
 	read_unlock(&eb->lock);
 }
 
@@ -203,6 +289,7 @@ void btrfs_tree_read_unlock(struct extent_buffer *eb)
  */
 void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
 {
+	trace_btrfs_tree_read_unlock_blocking(eb);
 	/*
 	 * if we're nested, we have the write lock.  No new locking
 	 * is needed as long as we are the lock owner.
@@ -210,7 +297,7 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
 	 * field only matters to the lock owner.
 	 */
 	if (eb->lock_nested && current->pid == eb->lock_owner) {
-		eb->lock_nested = 0;
+		eb->lock_nested = false;
 		return;
 	}
 	btrfs_assert_tree_read_locked(eb);
@@ -218,7 +305,7 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
 	/* atomic_dec_and_test implies a barrier */
 	if (atomic_dec_and_test(&eb->blocking_readers))
 		cond_wake_up_nomb(&eb->read_lock_wq);
-	atomic_dec(&eb->read_locks);
+	btrfs_assert_tree_read_locks_put(eb);
 }
 
 /*
@@ -227,27 +314,25 @@ void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb)
  */
 void btrfs_tree_lock(struct extent_buffer *eb)
 {
+	u64 start_ns = 0;
+
+	if (trace_btrfs_tree_lock_enabled())
+		start_ns = ktime_get_ns();
+
 	WARN_ON(eb->lock_owner == current->pid);
 again:
 	wait_event(eb->read_lock_wq, atomic_read(&eb->blocking_readers) == 0);
 	wait_event(eb->write_lock_wq, atomic_read(&eb->blocking_writers) == 0);
 	write_lock(&eb->lock);
-	if (atomic_read(&eb->blocking_readers)) {
+	if (atomic_read(&eb->blocking_readers) ||
+	    atomic_read(&eb->blocking_writers)) {
 		write_unlock(&eb->lock);
-		wait_event(eb->read_lock_wq,
-			   atomic_read(&eb->blocking_readers) == 0);
-		goto again;
-	}
-	if (atomic_read(&eb->blocking_writers)) {
-		write_unlock(&eb->lock);
-		wait_event(eb->write_lock_wq,
-			   atomic_read(&eb->blocking_writers) == 0);
 		goto again;
 	}
-	WARN_ON(atomic_read(&eb->spinning_writers));
-	atomic_inc(&eb->spinning_writers);
-	atomic_inc(&eb->write_locks);
+	btrfs_assert_spinning_writers_get(eb);
+	btrfs_assert_tree_write_locks_get(eb);
 	eb->lock_owner = current->pid;
+	trace_btrfs_tree_lock(eb, start_ns);
 }
 
 /*
@@ -260,28 +345,18 @@ void btrfs_tree_unlock(struct extent_buffer *eb)
 	BUG_ON(blockers > 1);
 
 	btrfs_assert_tree_locked(eb);
+	trace_btrfs_tree_unlock(eb);
 	eb->lock_owner = 0;
-	atomic_dec(&eb->write_locks);
+	btrfs_assert_tree_write_locks_put(eb);
 
 	if (blockers) {
-		WARN_ON(atomic_read(&eb->spinning_writers));
+		btrfs_assert_no_spinning_writers(eb);
 		atomic_dec(&eb->blocking_writers);
 		/* Use the lighter barrier after atomic */
 		smp_mb__after_atomic();
 		cond_wake_up_nomb(&eb->write_lock_wq);
 	} else {
-		WARN_ON(atomic_read(&eb->spinning_writers) != 1);
-		atomic_dec(&eb->spinning_writers);
+		btrfs_assert_spinning_writers_put(eb);
 		write_unlock(&eb->lock);
 	}
 }
-
-void btrfs_assert_tree_locked(struct extent_buffer *eb)
-{
-	BUG_ON(!atomic_read(&eb->write_locks));
-}
-
-static void btrfs_assert_tree_read_locked(struct extent_buffer *eb)
-{
-	BUG_ON(!atomic_read(&eb->read_locks));
-}
diff --git a/fs/btrfs/locking.h b/fs/btrfs/locking.h
index 29135def468e..595014f64830 100644
--- a/fs/btrfs/locking.h
+++ b/fs/btrfs/locking.h
@@ -17,8 +17,10 @@ void btrfs_tree_unlock(struct extent_buffer *eb);
 void btrfs_tree_read_lock(struct extent_buffer *eb);
 void btrfs_tree_read_unlock(struct extent_buffer *eb);
 void btrfs_tree_read_unlock_blocking(struct extent_buffer *eb);
-void btrfs_set_lock_blocking_rw(struct extent_buffer *eb, int rw);
-void btrfs_clear_lock_blocking_rw(struct extent_buffer *eb, int rw);
+void btrfs_set_lock_blocking_read(struct extent_buffer *eb);
+void btrfs_set_lock_blocking_write(struct extent_buffer *eb);
+void btrfs_clear_lock_blocking_read(struct extent_buffer *eb);
+void btrfs_clear_lock_blocking_write(struct extent_buffer *eb);
 void btrfs_assert_tree_locked(struct extent_buffer *eb);
 int btrfs_try_tree_read_lock(struct extent_buffer *eb);
 int btrfs_try_tree_write_lock(struct extent_buffer *eb);
@@ -37,13 +39,4 @@ static inline void btrfs_tree_unlock_rw(struct extent_buffer *eb, int rw)
 		BUG();
 }
 
-static inline void btrfs_set_lock_blocking(struct extent_buffer *eb)
-{
-	btrfs_set_lock_blocking_rw(eb, BTRFS_WRITE_LOCK);
-}
-
-static inline void btrfs_clear_lock_blocking(struct extent_buffer *eb)
-{
-	btrfs_clear_lock_blocking_rw(eb, BTRFS_WRITE_LOCK_BLOCKING);
-}
 #endif
diff --git a/fs/btrfs/lzo.c b/fs/btrfs/lzo.c
index 90639140439f..579d53ae256f 100644
--- a/fs/btrfs/lzo.c
+++ b/fs/btrfs/lzo.c
@@ -61,6 +61,28 @@ struct workspace {
 	struct list_head list;
 };
 
+static struct workspace_manager wsm;
+
+static void lzo_init_workspace_manager(void)
+{
+	btrfs_init_workspace_manager(&wsm, &btrfs_lzo_compress);
+}
+
+static void lzo_cleanup_workspace_manager(void)
+{
+	btrfs_cleanup_workspace_manager(&wsm);
+}
+
+static struct list_head *lzo_get_workspace(unsigned int level)
+{
+	return btrfs_get_workspace(&wsm, level);
+}
+
+static void lzo_put_workspace(struct list_head *ws)
+{
+	btrfs_put_workspace(&wsm, ws);
+}
+
 static void lzo_free_workspace(struct list_head *ws)
 {
 	struct workspace *workspace = list_entry(ws, struct workspace, list);
@@ -71,7 +93,7 @@ static void lzo_free_workspace(struct list_head *ws)
 	kfree(workspace);
 }
 
-static struct list_head *lzo_alloc_workspace(void)
+static struct list_head *lzo_alloc_workspace(unsigned int level)
 {
 	struct workspace *workspace;
 
@@ -485,11 +507,16 @@ out:
 	return ret;
 }
 
-static void lzo_set_level(struct list_head *ws, unsigned int type)
+static unsigned int lzo_set_level(unsigned int level)
 {
+	return 0;
 }
 
 const struct btrfs_compress_op btrfs_lzo_compress = {
+	.init_workspace_manager	= lzo_init_workspace_manager,
+	.cleanup_workspace_manager = lzo_cleanup_workspace_manager,
+	.get_workspace		= lzo_get_workspace,
+	.put_workspace		= lzo_put_workspace,
 	.alloc_workspace	= lzo_alloc_workspace,
 	.free_workspace		= lzo_free_workspace,
 	.compress_pages		= lzo_compress_pages,
diff --git a/fs/btrfs/ordered-data.c b/fs/btrfs/ordered-data.c
index 6fde2b2741ef..52889da69113 100644
--- a/fs/btrfs/ordered-data.c
+++ b/fs/btrfs/ordered-data.c
@@ -6,6 +6,7 @@
 #include <linux/slab.h>
 #include <linux/blkdev.h>
 #include <linux/writeback.h>
+#include <linux/sched/mm.h>
 #include "ctree.h"
 #include "transaction.h"
 #include "btrfs_inode.h"
@@ -194,8 +195,11 @@ static int __btrfs_add_ordered_extent(struct inode *inode, u64 file_offset,
 	if (type != BTRFS_ORDERED_IO_DONE && type != BTRFS_ORDERED_COMPLETE)
 		set_bit(type, &entry->flags);
 
-	if (dio)
+	if (dio) {
+		percpu_counter_add_batch(&fs_info->dio_bytes, len,
+					 fs_info->delalloc_batch);
 		set_bit(BTRFS_ORDERED_DIRECT, &entry->flags);
+	}
 
 	/* one ref for the tree */
 	refcount_set(&entry->refs, 1);
@@ -270,13 +274,12 @@ int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
  * when an ordered extent is finished.  If the list covers more than one
  * ordered extent, it is split across multiples.
  */
-void btrfs_add_ordered_sum(struct inode *inode,
-			   struct btrfs_ordered_extent *entry,
+void btrfs_add_ordered_sum(struct btrfs_ordered_extent *entry,
 			   struct btrfs_ordered_sum *sum)
 {
 	struct btrfs_ordered_inode_tree *tree;
 
-	tree = &BTRFS_I(inode)->ordered_tree;
+	tree = &BTRFS_I(entry->inode)->ordered_tree;
 	spin_lock_irq(&tree->lock);
 	list_add_tail(&sum->list, &entry->list);
 	spin_unlock_irq(&tree->lock);
@@ -442,7 +445,7 @@ void btrfs_put_ordered_extent(struct btrfs_ordered_extent *entry)
 			cur = entry->list.next;
 			sum = list_entry(cur, struct btrfs_ordered_sum, list);
 			list_del(&sum->list);
-			kfree(sum);
+			kvfree(sum);
 		}
 		kmem_cache_free(btrfs_ordered_extent_cache, entry);
 	}
@@ -468,6 +471,10 @@ void btrfs_remove_ordered_extent(struct inode *inode,
 	if (root != fs_info->tree_root)
 		btrfs_delalloc_release_metadata(btrfs_inode, entry->len, false);
 
+	if (test_bit(BTRFS_ORDERED_DIRECT, &entry->flags))
+		percpu_counter_add_batch(&fs_info->dio_bytes, -entry->len,
+					 fs_info->delalloc_batch);
+
 	tree = &btrfs_inode->ordered_tree;
 	spin_lock_irq(&tree->lock);
 	node = &entry->rb_node;
diff --git a/fs/btrfs/ordered-data.h b/fs/btrfs/ordered-data.h
index fb9a161f0215..4c5991c3de14 100644
--- a/fs/btrfs/ordered-data.h
+++ b/fs/btrfs/ordered-data.h
@@ -167,8 +167,7 @@ int btrfs_add_ordered_extent_dio(struct inode *inode, u64 file_offset,
 int btrfs_add_ordered_extent_compress(struct inode *inode, u64 file_offset,
 				      u64 start, u64 len, u64 disk_len,
 				      int type, int compress_type);
-void btrfs_add_ordered_sum(struct inode *inode,
-			   struct btrfs_ordered_extent *entry,
+void btrfs_add_ordered_sum(struct btrfs_ordered_extent *entry,
 			   struct btrfs_ordered_sum *sum);
 struct btrfs_ordered_extent *btrfs_lookup_ordered_extent(struct inode *inode,
 							 u64 file_offset);
diff --git a/fs/btrfs/print-tree.c b/fs/btrfs/print-tree.c
index df49931ffe92..1141ca5fae6a 100644
--- a/fs/btrfs/print-tree.c
+++ b/fs/btrfs/print-tree.c
@@ -189,7 +189,7 @@ void btrfs_print_leaf(struct extent_buffer *l)
 	btrfs_info(fs_info,
 		   "leaf %llu gen %llu total ptrs %d free space %d owner %llu",
 		   btrfs_header_bytenr(l), btrfs_header_generation(l), nr,
-		   btrfs_leaf_free_space(fs_info, l), btrfs_header_owner(l));
+		   btrfs_leaf_free_space(l), btrfs_header_owner(l));
 	print_eb_refs_lock(l);
 	for (i = 0 ; i < nr ; i++) {
 		item = btrfs_item_nr(i);
diff --git a/fs/btrfs/props.c b/fs/btrfs/props.c
index dc6140013ae8..a9e2e66152ee 100644
--- a/fs/btrfs/props.c
+++ b/fs/btrfs/props.c
@@ -23,36 +23,6 @@ struct prop_handler {
 	int inheritable;
 };
 
-static int prop_compression_validate(const char *value, size_t len);
-static int prop_compression_apply(struct inode *inode,
-				  const char *value,
-				  size_t len);
-static const char *prop_compression_extract(struct inode *inode);
-
-static struct prop_handler prop_handlers[] = {
-	{
-		.xattr_name = XATTR_BTRFS_PREFIX "compression",
-		.validate = prop_compression_validate,
-		.apply = prop_compression_apply,
-		.extract = prop_compression_extract,
-		.inheritable = 1
-	},
-};
-
-void __init btrfs_props_init(void)
-{
-	int i;
-
-	hash_init(prop_handlers_ht);
-
-	for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
-		struct prop_handler *p = &prop_handlers[i];
-		u64 h = btrfs_name_hash(p->xattr_name, strlen(p->xattr_name));
-
-		hash_add(prop_handlers_ht, &p->node, h);
-	}
-}
-
 static const struct hlist_head *find_prop_handlers_by_hash(const u64 hash)
 {
 	struct hlist_head *h;
@@ -85,15 +55,9 @@ find_prop_handler(const char *name,
 	return NULL;
 }
 
-static int __btrfs_set_prop(struct btrfs_trans_handle *trans,
-			    struct inode *inode,
-			    const char *name,
-			    const char *value,
-			    size_t value_len,
-			    int flags)
+int btrfs_validate_prop(const char *name, const char *value, size_t value_len)
 {
 	const struct prop_handler *handler;
-	int ret;
 
 	if (strlen(name) <= XATTR_BTRFS_PREFIX_LEN)
 		return -EINVAL;
@@ -102,9 +66,26 @@ static int __btrfs_set_prop(struct btrfs_trans_handle *trans,
 	if (!handler)
 		return -EINVAL;
 
+	if (value_len == 0)
+		return 0;
+
+	return handler->validate(value, value_len);
+}
+
+int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
+		   const char *name, const char *value, size_t value_len,
+		   int flags)
+{
+	const struct prop_handler *handler;
+	int ret;
+
+	handler = find_prop_handler(name, NULL);
+	if (!handler)
+		return -EINVAL;
+
 	if (value_len == 0) {
 		ret = btrfs_setxattr(trans, inode, handler->xattr_name,
-				       NULL, 0, flags);
+				     NULL, 0, flags);
 		if (ret)
 			return ret;
 
@@ -114,17 +95,14 @@ static int __btrfs_set_prop(struct btrfs_trans_handle *trans,
 		return ret;
 	}
 
-	ret = handler->validate(value, value_len);
-	if (ret)
-		return ret;
-	ret = btrfs_setxattr(trans, inode, handler->xattr_name,
-			       value, value_len, flags);
+	ret = btrfs_setxattr(trans, inode, handler->xattr_name, value,
+			     value_len, flags);
 	if (ret)
 		return ret;
 	ret = handler->apply(inode, value, value_len);
 	if (ret) {
-		btrfs_setxattr(trans, inode, handler->xattr_name,
-				 NULL, 0, flags);
+		btrfs_setxattr(trans, inode, handler->xattr_name, NULL,
+			       0, flags);
 		return ret;
 	}
 
@@ -133,15 +111,6 @@ static int __btrfs_set_prop(struct btrfs_trans_handle *trans,
 	return 0;
 }
 
-int btrfs_set_prop(struct inode *inode,
-		   const char *name,
-		   const char *value,
-		   size_t value_len,
-		   int flags)
-{
-	return __btrfs_set_prop(NULL, inode, name, value, value_len, flags);
-}
-
 static int iterate_object_props(struct btrfs_root *root,
 				struct btrfs_path *path,
 				u64 objectid,
@@ -283,6 +252,78 @@ int btrfs_load_inode_props(struct inode *inode, struct btrfs_path *path)
 	return ret;
 }
 
+static int prop_compression_validate(const char *value, size_t len)
+{
+	if (!value)
+		return 0;
+
+	if (!strncmp("lzo", value, 3))
+		return 0;
+	else if (!strncmp("zlib", value, 4))
+		return 0;
+	else if (!strncmp("zstd", value, 4))
+		return 0;
+
+	return -EINVAL;
+}
+
+static int prop_compression_apply(struct inode *inode, const char *value,
+				  size_t len)
+{
+	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
+	int type;
+
+	if (len == 0) {
+		BTRFS_I(inode)->flags |= BTRFS_INODE_NOCOMPRESS;
+		BTRFS_I(inode)->flags &= ~BTRFS_INODE_COMPRESS;
+		BTRFS_I(inode)->prop_compress = BTRFS_COMPRESS_NONE;
+
+		return 0;
+	}
+
+	if (!strncmp("lzo", value, 3)) {
+		type = BTRFS_COMPRESS_LZO;
+		btrfs_set_fs_incompat(fs_info, COMPRESS_LZO);
+	} else if (!strncmp("zlib", value, 4)) {
+		type = BTRFS_COMPRESS_ZLIB;
+	} else if (!strncmp("zstd", value, 4)) {
+		type = BTRFS_COMPRESS_ZSTD;
+		btrfs_set_fs_incompat(fs_info, COMPRESS_ZSTD);
+	} else {
+		return -EINVAL;
+	}
+
+	BTRFS_I(inode)->flags &= ~BTRFS_INODE_NOCOMPRESS;
+	BTRFS_I(inode)->flags |= BTRFS_INODE_COMPRESS;
+	BTRFS_I(inode)->prop_compress = type;
+
+	return 0;
+}
+
+static const char *prop_compression_extract(struct inode *inode)
+{
+	switch (BTRFS_I(inode)->prop_compress) {
+	case BTRFS_COMPRESS_ZLIB:
+	case BTRFS_COMPRESS_LZO:
+	case BTRFS_COMPRESS_ZSTD:
+		return btrfs_compress_type2str(BTRFS_I(inode)->prop_compress);
+	default:
+		break;
+	}
+
+	return NULL;
+}
+
+static struct prop_handler prop_handlers[] = {
+	{
+		.xattr_name = XATTR_BTRFS_PREFIX "compression",
+		.validate = prop_compression_validate,
+		.apply = prop_compression_apply,
+		.extract = prop_compression_extract,
+		.inheritable = 1
+	},
+};
+
 static int inherit_props(struct btrfs_trans_handle *trans,
 			 struct inode *inode,
 			 struct inode *parent)
@@ -291,6 +332,7 @@ static int inherit_props(struct btrfs_trans_handle *trans,
 	struct btrfs_fs_info *fs_info = root->fs_info;
 	int ret;
 	int i;
+	bool need_reserve = false;
 
 	if (!test_bit(BTRFS_INODE_HAS_PROPS,
 		      &BTRFS_I(parent)->runtime_flags))
@@ -308,20 +350,51 @@ static int inherit_props(struct btrfs_trans_handle *trans,
 		if (!value)
 			continue;
 
-		num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1);
-		ret = btrfs_block_rsv_add(root, trans->block_rsv,
-					  num_bytes, BTRFS_RESERVE_NO_FLUSH);
+		/*
+		 * This is not strictly necessary as the property should be
+		 * valid, but in case it isn't, don't propagate it futher.
+		 */
+		ret = h->validate(value, strlen(value));
 		if (ret)
-			goto out;
-		ret = __btrfs_set_prop(trans, inode, h->xattr_name,
-				       value, strlen(value), 0);
-		btrfs_block_rsv_release(fs_info, trans->block_rsv, num_bytes);
-		if (ret)
-			goto out;
+			continue;
+
+		/*
+		 * Currently callers should be reserving 1 item for properties,
+		 * since we only have 1 property that we currently support.  If
+		 * we add more in the future we need to try and reserve more
+		 * space for them.  But we should also revisit how we do space
+		 * reservations if we do add more properties in the future.
+		 */
+		if (need_reserve) {
+			num_bytes = btrfs_calc_trans_metadata_size(fs_info, 1);
+			ret = btrfs_block_rsv_add(root, trans->block_rsv,
+					num_bytes, BTRFS_RESERVE_NO_FLUSH);
+			if (ret)
+				return ret;
+		}
+
+		ret = btrfs_setxattr(trans, inode, h->xattr_name, value,
+				     strlen(value), 0);
+		if (!ret) {
+			ret = h->apply(inode, value, strlen(value));
+			if (ret)
+				btrfs_setxattr(trans, inode, h->xattr_name,
+					       NULL, 0, 0);
+			else
+				set_bit(BTRFS_INODE_HAS_PROPS,
+					&BTRFS_I(inode)->runtime_flags);
+		}
+
+		if (need_reserve) {
+			btrfs_block_rsv_release(fs_info, trans->block_rsv,
+					num_bytes);
+			if (ret)
+				return ret;
+		}
+		need_reserve = true;
 	}
-	ret = 0;
-out:
-	return ret;
+
+	return 0;
 }
 
 int btrfs_inode_inherit_props(struct btrfs_trans_handle *trans,
@@ -364,64 +437,17 @@ int btrfs_subvol_inherit_props(struct btrfs_trans_handle *trans,
 	return ret;
 }
 
-static int prop_compression_validate(const char *value, size_t len)
-{
-	if (!strncmp("lzo", value, len))
-		return 0;
-	else if (!strncmp("zlib", value, len))
-		return 0;
-	else if (!strncmp("zstd", value, len))
-		return 0;
-
-	return -EINVAL;
-}
-
-static int prop_compression_apply(struct inode *inode,
-				  const char *value,
-				  size_t len)
+void __init btrfs_props_init(void)
 {
-	struct btrfs_fs_info *fs_info = btrfs_sb(inode->i_sb);
-	int type;
-
-	if (len == 0) {
-		BTRFS_I(inode)->flags |= BTRFS_INODE_NOCOMPRESS;
-		BTRFS_I(inode)->flags &= ~BTRFS_INODE_COMPRESS;
-		BTRFS_I(inode)->prop_compress = BTRFS_COMPRESS_NONE;
-
-		return 0;
-	}
-
-	if (!strncmp("lzo", value, 3)) {
-		type = BTRFS_COMPRESS_LZO;
-		btrfs_set_fs_incompat(fs_info, COMPRESS_LZO);
-	} else if (!strncmp("zlib", value, 4)) {
-		type = BTRFS_COMPRESS_ZLIB;
-	} else if (!strncmp("zstd", value, len)) {
-		type = BTRFS_COMPRESS_ZSTD;
-		btrfs_set_fs_incompat(fs_info, COMPRESS_ZSTD);
-	} else {
-		return -EINVAL;
-	}
+	int i;
 
-	BTRFS_I(inode)->flags &= ~BTRFS_INODE_NOCOMPRESS;
-	BTRFS_I(inode)->flags |= BTRFS_INODE_COMPRESS;
-	BTRFS_I(inode)->prop_compress = type;
+	hash_init(prop_handlers_ht);
 
-	return 0;
-}
+	for (i = 0; i < ARRAY_SIZE(prop_handlers); i++) {
+		struct prop_handler *p = &prop_handlers[i];
+		u64 h = btrfs_name_hash(p->xattr_name, strlen(p->xattr_name));
 
-static const char *prop_compression_extract(struct inode *inode)
-{
-	switch (BTRFS_I(inode)->prop_compress) {
-	case BTRFS_COMPRESS_ZLIB:
-	case BTRFS_COMPRESS_LZO:
-	case BTRFS_COMPRESS_ZSTD:
-		return btrfs_compress_type2str(BTRFS_I(inode)->prop_compress);
-	default:
-		break;
+		hash_add(prop_handlers_ht, &p->node, h);
 	}
-
-	return NULL;
 }
 
-
diff --git a/fs/btrfs/props.h b/fs/btrfs/props.h
index 618815b4f9d5..40b2c65b518c 100644
--- a/fs/btrfs/props.h
+++ b/fs/btrfs/props.h
@@ -10,11 +10,10 @@
 
 void __init btrfs_props_init(void);
 
-int btrfs_set_prop(struct inode *inode,
-		   const char *name,
-		   const char *value,
-		   size_t value_len,
+int btrfs_set_prop(struct btrfs_trans_handle *trans, struct inode *inode,
+		   const char *name, const char *value, size_t value_len,
 		   int flags);
+int btrfs_validate_prop(const char *name, const char *value, size_t value_len);
 
 int btrfs_load_inode_props(struct inode *inode, struct btrfs_path *path);
 
diff --git a/fs/btrfs/qgroup.c b/fs/btrfs/qgroup.c
index 4e473a998219..3e6ffbbd8b0a 100644
--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -894,6 +894,12 @@ int btrfs_quota_enable(struct btrfs_fs_info *fs_info)
 	if (fs_info->quota_root)
 		goto out;
 
+	fs_info->qgroup_ulist = ulist_alloc(GFP_KERNEL);
+	if (!fs_info->qgroup_ulist) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
 	/*
 	 * 1 for quota root item
 	 * 1 for BTRFS_QGROUP_STATUS item
@@ -909,18 +915,10 @@ int btrfs_quota_enable(struct btrfs_fs_info *fs_info)
 		goto out;
 	}
 
-	fs_info->qgroup_ulist = ulist_alloc(GFP_KERNEL);
-	if (!fs_info->qgroup_ulist) {
-		ret = -ENOMEM;
-		btrfs_abort_transaction(trans, ret);
-		goto out;
-	}
-
 	/*
 	 * initially create the quota tree
 	 */
-	quota_root = btrfs_create_tree(trans, fs_info,
-				       BTRFS_QUOTA_TREE_OBJECTID);
+	quota_root = btrfs_create_tree(trans, BTRFS_QUOTA_TREE_OBJECTID);
 	if (IS_ERR(quota_root)) {
 		ret =  PTR_ERR(quota_root);
 		btrfs_abort_transaction(trans, ret);
@@ -1102,7 +1100,7 @@ int btrfs_quota_disable(struct btrfs_fs_info *fs_info)
 	list_del(&quota_root->dirty_list);
 
 	btrfs_tree_lock(quota_root->node);
-	clean_tree_block(fs_info, quota_root->node);
+	btrfs_clean_tree_block(quota_root->node);
 	btrfs_tree_unlock(quota_root->node);
 	btrfs_free_tree_block(trans, quota_root, quota_root->node, 0, 1);
 
@@ -1546,12 +1544,18 @@ int btrfs_qgroup_trace_extent_nolock(struct btrfs_fs_info *fs_info,
 		parent_node = *p;
 		entry = rb_entry(parent_node, struct btrfs_qgroup_extent_record,
 				 node);
-		if (bytenr < entry->bytenr)
+		if (bytenr < entry->bytenr) {
 			p = &(*p)->rb_left;
-		else if (bytenr > entry->bytenr)
+		} else if (bytenr > entry->bytenr) {
 			p = &(*p)->rb_right;
-		else
+		} else {
+			if (record->data_rsv && !entry->data_rsv) {
+				entry->data_rsv = record->data_rsv;
+				entry->data_rsv_refroot =
+					record->data_rsv_refroot;
+			}
 			return 1;
+		}
 	}
 
 	rb_link_node(&record->node, parent_node, p);
@@ -1597,7 +1601,7 @@ int btrfs_qgroup_trace_extent(struct btrfs_trans_handle *trans, u64 bytenr,
 	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags)
 	    || bytenr == 0 || num_bytes == 0)
 		return 0;
-	record = kmalloc(sizeof(*record), gfp_flag);
+	record = kzalloc(sizeof(*record), gfp_flag);
 	if (!record)
 		return -ENOMEM;
 
@@ -1832,7 +1836,7 @@ static int qgroup_trace_extent_swap(struct btrfs_trans_handle* trans,
 			src_path->nodes[cur_level] = eb;
 
 			btrfs_tree_read_lock(eb);
-			btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+			btrfs_set_lock_blocking_read(eb);
 			src_path->locks[cur_level] = BTRFS_READ_LOCK_BLOCKING;
 		}
 
@@ -1917,8 +1921,8 @@ static int qgroup_trace_new_subtree_blocks(struct btrfs_trans_handle* trans,
 	int i;
 
 	/* Level sanity check */
-	if (cur_level < 0 || cur_level >= BTRFS_MAX_LEVEL ||
-	    root_level < 0 || root_level >= BTRFS_MAX_LEVEL ||
+	if (cur_level < 0 || cur_level >= BTRFS_MAX_LEVEL - 1 ||
+	    root_level < 0 || root_level >= BTRFS_MAX_LEVEL - 1 ||
 	    root_level < cur_level) {
 		btrfs_err_rl(fs_info,
 			"%s: bad levels, cur_level=%d root_level=%d",
@@ -1973,7 +1977,7 @@ static int qgroup_trace_new_subtree_blocks(struct btrfs_trans_handle* trans,
 		dst_path->slots[cur_level] = 0;
 
 		btrfs_tree_read_lock(eb);
-		btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+		btrfs_set_lock_blocking_read(eb);
 		dst_path->locks[cur_level] = BTRFS_READ_LOCK_BLOCKING;
 		need_cleanup = true;
 	}
@@ -2017,86 +2021,30 @@ out:
 	return ret;
 }
 
-/*
- * Inform qgroup to trace subtree swap used in balance.
- *
- * Unlike btrfs_qgroup_trace_subtree(), this function will only trace
- * new tree blocks whose generation is equal to (or larger than) @last_snapshot.
- *
- * Will go down the tree block pointed by @dst_eb (pointed by @dst_parent and
- * @dst_slot), and find any tree blocks whose generation is at @last_snapshot,
- * and then go down @src_eb (pointed by @src_parent and @src_slot) to find
- * the counterpart of the tree block, then mark both tree blocks as qgroup dirty,
- * and skip all tree blocks whose generation is smaller than last_snapshot.
- *
- * This would skip tons of tree blocks of original btrfs_qgroup_trace_subtree(),
- * which could be the cause of very slow balance if the file tree is large.
- *
- * @src_parent, @src_slot: pointer to src (file tree) eb.
- * @dst_parent, @dst_slot: pointer to dst (reloc tree) eb.
- */
-int btrfs_qgroup_trace_subtree_swap(struct btrfs_trans_handle *trans,
-				struct btrfs_block_group_cache *bg_cache,
-				struct extent_buffer *src_parent, int src_slot,
-				struct extent_buffer *dst_parent, int dst_slot,
-				u64 last_snapshot)
+static int qgroup_trace_subtree_swap(struct btrfs_trans_handle *trans,
+				struct extent_buffer *src_eb,
+				struct extent_buffer *dst_eb,
+				u64 last_snapshot, bool trace_leaf)
 {
 	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_path *dst_path = NULL;
-	struct btrfs_key first_key;
-	struct extent_buffer *src_eb = NULL;
-	struct extent_buffer *dst_eb = NULL;
-	bool trace_leaf = false;
-	u64 child_gen;
-	u64 child_bytenr;
 	int level;
 	int ret;
 
 	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
 		return 0;
 
-	/* Check parameter order */
-	if (btrfs_node_ptr_generation(src_parent, src_slot) >
-	    btrfs_node_ptr_generation(dst_parent, dst_slot)) {
+	/* Wrong parameter order */
+	if (btrfs_header_generation(src_eb) > btrfs_header_generation(dst_eb)) {
 		btrfs_err_rl(fs_info,
 		"%s: bad parameter order, src_gen=%llu dst_gen=%llu", __func__,
-			btrfs_node_ptr_generation(src_parent, src_slot),
-			btrfs_node_ptr_generation(dst_parent, dst_slot));
+			     btrfs_header_generation(src_eb),
+			     btrfs_header_generation(dst_eb));
 		return -EUCLEAN;
 	}
 
-	/*
-	 * Only trace leaf if we're relocating data block groups, this could
-	 * reduce tons of data extents tracing for meta/sys bg relocation.
-	 */
-	if (bg_cache->flags & BTRFS_BLOCK_GROUP_DATA)
-		trace_leaf = true;
-	/* Read out real @src_eb, pointed by @src_parent and @src_slot */
-	child_bytenr = btrfs_node_blockptr(src_parent, src_slot);
-	child_gen = btrfs_node_ptr_generation(src_parent, src_slot);
-	btrfs_node_key_to_cpu(src_parent, &first_key, src_slot);
-
-	src_eb = read_tree_block(fs_info, child_bytenr, child_gen,
-			btrfs_header_level(src_parent) - 1, &first_key);
-	if (IS_ERR(src_eb)) {
-		ret = PTR_ERR(src_eb);
-		goto out;
-	}
-
-	/* Read out real @dst_eb, pointed by @src_parent and @src_slot */
-	child_bytenr = btrfs_node_blockptr(dst_parent, dst_slot);
-	child_gen = btrfs_node_ptr_generation(dst_parent, dst_slot);
-	btrfs_node_key_to_cpu(dst_parent, &first_key, dst_slot);
-
-	dst_eb = read_tree_block(fs_info, child_bytenr, child_gen,
-			btrfs_header_level(dst_parent) - 1, &first_key);
-	if (IS_ERR(dst_eb)) {
-		ret = PTR_ERR(dst_eb);
-		goto out;
-	}
-
 	if (!extent_buffer_uptodate(src_eb) || !extent_buffer_uptodate(dst_eb)) {
-		ret = -EINVAL;
+		ret = -EIO;
 		goto out;
 	}
 
@@ -2106,14 +2054,13 @@ int btrfs_qgroup_trace_subtree_swap(struct btrfs_trans_handle *trans,
 		ret = -ENOMEM;
 		goto out;
 	}
-
 	/* For dst_path */
 	extent_buffer_get(dst_eb);
 	dst_path->nodes[level] = dst_eb;
 	dst_path->slots[level] = 0;
 	dst_path->locks[level] = 0;
 
-	/* Do the generation-aware breadth-first search */
+	/* Do the generation aware breadth-first search */
 	ret = qgroup_trace_new_subtree_blocks(trans, src_eb, dst_path, level,
 					      level, last_snapshot, trace_leaf);
 	if (ret < 0)
@@ -2121,8 +2068,6 @@ int btrfs_qgroup_trace_subtree_swap(struct btrfs_trans_handle *trans,
 	ret = 0;
 
 out:
-	free_extent_buffer(src_eb);
-	free_extent_buffer(dst_eb);
 	btrfs_free_path(dst_path);
 	if (ret < 0)
 		fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
@@ -2207,7 +2152,7 @@ walk_down:
 			path->slots[level] = 0;
 
 			btrfs_tree_read_lock(eb);
-			btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+			btrfs_set_lock_blocking_read(eb);
 			path->locks[level] = BTRFS_READ_LOCK_BLOCKING;
 
 			ret = btrfs_qgroup_trace_extent(trans, child_bytenr,
@@ -2576,6 +2521,11 @@ int btrfs_qgroup_account_extents(struct btrfs_trans_handle *trans)
 					goto cleanup;
 			}
 
+			/* Free the reserved data space */
+			btrfs_qgroup_free_refroot(fs_info,
+					record->data_rsv_refroot,
+					record->data_rsv,
+					BTRFS_QGROUP_RSV_DATA);
 			/*
 			 * Use SEQ_LAST as time_seq to do special search, which
 			 * doesn't lock tree or delayed_refs and search current
@@ -2842,16 +2792,15 @@ out:
 /*
  * Two limits to commit transaction in advance.
  *
- * For RATIO, it will be 1/RATIO of the remaining limit
- * (excluding data and prealloc meta) as threshold.
+ * For RATIO, it will be 1/RATIO of the remaining limit as threshold.
  * For SIZE, it will be in byte unit as threshold.
  */
-#define QGROUP_PERTRANS_RATIO		32
-#define QGROUP_PERTRANS_SIZE		SZ_32M
+#define QGROUP_FREE_RATIO		32
+#define QGROUP_FREE_SIZE		SZ_32M
 static bool qgroup_check_limits(struct btrfs_fs_info *fs_info,
 				const struct btrfs_qgroup *qg, u64 num_bytes)
 {
-	u64 limit;
+	u64 free;
 	u64 threshold;
 
 	if ((qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_RFER) &&
@@ -2870,20 +2819,21 @@ static bool qgroup_check_limits(struct btrfs_fs_info *fs_info,
 	 */
 	if ((qg->lim_flags & (BTRFS_QGROUP_LIMIT_MAX_RFER |
 			      BTRFS_QGROUP_LIMIT_MAX_EXCL))) {
-		if (qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL)
-			limit = qg->max_excl;
-		else
-			limit = qg->max_rfer;
-		threshold = (limit - qg->rsv.values[BTRFS_QGROUP_RSV_DATA] -
-			    qg->rsv.values[BTRFS_QGROUP_RSV_META_PREALLOC]) /
-			    QGROUP_PERTRANS_RATIO;
-		threshold = min_t(u64, threshold, QGROUP_PERTRANS_SIZE);
+		if (qg->lim_flags & BTRFS_QGROUP_LIMIT_MAX_EXCL) {
+			free = qg->max_excl - qgroup_rsv_total(qg) - qg->excl;
+			threshold = min_t(u64, qg->max_excl / QGROUP_FREE_RATIO,
+					  QGROUP_FREE_SIZE);
+		} else {
+			free = qg->max_rfer - qgroup_rsv_total(qg) - qg->rfer;
+			threshold = min_t(u64, qg->max_rfer / QGROUP_FREE_RATIO,
+					  QGROUP_FREE_SIZE);
+		}
 
 		/*
 		 * Use transaction_kthread to commit transaction, so we no
 		 * longer need to bother nested transaction nor lock context.
 		 */
-		if (qg->rsv.values[BTRFS_QGROUP_RSV_META_PERTRANS] > threshold)
+		if (free < threshold)
 			btrfs_commit_transaction_locksafe(fs_info);
 	}
 
@@ -2959,7 +2909,6 @@ static int qgroup_reserve(struct btrfs_root *root, u64 num_bytes, bool enforce,
 
 		qg = unode_aux_to_qgroup(unode);
 
-		trace_qgroup_update_reserve(fs_info, qg, num_bytes, type);
 		qgroup_rsv_add(fs_info, qg, num_bytes, type);
 	}
 
@@ -3026,7 +2975,6 @@ void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
 
 		qg = unode_aux_to_qgroup(unode);
 
-		trace_qgroup_update_reserve(fs_info, qg, -(s64)num_bytes, type);
 		qgroup_rsv_release(fs_info, qg, num_bytes, type);
 
 		list_for_each_entry(glist, &qg->groups, next_group) {
@@ -3783,3 +3731,247 @@ void btrfs_qgroup_check_reserved_leak(struct inode *inode)
 	}
 	extent_changeset_release(&changeset);
 }
+
+void btrfs_qgroup_init_swapped_blocks(
+	struct btrfs_qgroup_swapped_blocks *swapped_blocks)
+{
+	int i;
+
+	spin_lock_init(&swapped_blocks->lock);
+	for (i = 0; i < BTRFS_MAX_LEVEL; i++)
+		swapped_blocks->blocks[i] = RB_ROOT;
+	swapped_blocks->swapped = false;
+}
+
+/*
+ * Delete all swapped blocks record of @root.
+ * Every record here means we skipped a full subtree scan for qgroup.
+ *
+ * Gets called when committing one transaction.
+ */
+void btrfs_qgroup_clean_swapped_blocks(struct btrfs_root *root)
+{
+	struct btrfs_qgroup_swapped_blocks *swapped_blocks;
+	int i;
+
+	swapped_blocks = &root->swapped_blocks;
+
+	spin_lock(&swapped_blocks->lock);
+	if (!swapped_blocks->swapped)
+		goto out;
+	for (i = 0; i < BTRFS_MAX_LEVEL; i++) {
+		struct rb_root *cur_root = &swapped_blocks->blocks[i];
+		struct btrfs_qgroup_swapped_block *entry;
+		struct btrfs_qgroup_swapped_block *next;
+
+		rbtree_postorder_for_each_entry_safe(entry, next, cur_root,
+						     node)
+			kfree(entry);
+		swapped_blocks->blocks[i] = RB_ROOT;
+	}
+	swapped_blocks->swapped = false;
+out:
+	spin_unlock(&swapped_blocks->lock);
+}
+
+/*
+ * Add subtree roots record into @subvol_root.
+ *
+ * @subvol_root:	tree root of the subvolume tree get swapped
+ * @bg:			block group under balance
+ * @subvol_parent/slot:	pointer to the subtree root in subvolume tree
+ * @reloc_parent/slot:	pointer to the subtree root in reloc tree
+ *			BOTH POINTERS ARE BEFORE TREE SWAP
+ * @last_snapshot:	last snapshot generation of the subvolume tree
+ */
+int btrfs_qgroup_add_swapped_blocks(struct btrfs_trans_handle *trans,
+		struct btrfs_root *subvol_root,
+		struct btrfs_block_group_cache *bg,
+		struct extent_buffer *subvol_parent, int subvol_slot,
+		struct extent_buffer *reloc_parent, int reloc_slot,
+		u64 last_snapshot)
+{
+	struct btrfs_fs_info *fs_info = subvol_root->fs_info;
+	struct btrfs_qgroup_swapped_blocks *blocks = &subvol_root->swapped_blocks;
+	struct btrfs_qgroup_swapped_block *block;
+	struct rb_node **cur;
+	struct rb_node *parent = NULL;
+	int level = btrfs_header_level(subvol_parent) - 1;
+	int ret = 0;
+
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
+		return 0;
+
+	if (btrfs_node_ptr_generation(subvol_parent, subvol_slot) >
+	    btrfs_node_ptr_generation(reloc_parent, reloc_slot)) {
+		btrfs_err_rl(fs_info,
+		"%s: bad parameter order, subvol_gen=%llu reloc_gen=%llu",
+			__func__,
+			btrfs_node_ptr_generation(subvol_parent, subvol_slot),
+			btrfs_node_ptr_generation(reloc_parent, reloc_slot));
+		return -EUCLEAN;
+	}
+
+	block = kmalloc(sizeof(*block), GFP_NOFS);
+	if (!block) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	/*
+	 * @reloc_parent/slot is still before swap, while @block is going to
+	 * record the bytenr after swap, so we do the swap here.
+	 */
+	block->subvol_bytenr = btrfs_node_blockptr(reloc_parent, reloc_slot);
+	block->subvol_generation = btrfs_node_ptr_generation(reloc_parent,
+							     reloc_slot);
+	block->reloc_bytenr = btrfs_node_blockptr(subvol_parent, subvol_slot);
+	block->reloc_generation = btrfs_node_ptr_generation(subvol_parent,
+							    subvol_slot);
+	block->last_snapshot = last_snapshot;
+	block->level = level;
+
+	/*
+	 * If we have bg == NULL, we're called from btrfs_recover_relocation(),
+	 * no one else can modify tree blocks thus we qgroup will not change
+	 * no matter the value of trace_leaf.
+	 */
+	if (bg && bg->flags & BTRFS_BLOCK_GROUP_DATA)
+		block->trace_leaf = true;
+	else
+		block->trace_leaf = false;
+	btrfs_node_key_to_cpu(reloc_parent, &block->first_key, reloc_slot);
+
+	/* Insert @block into @blocks */
+	spin_lock(&blocks->lock);
+	cur = &blocks->blocks[level].rb_node;
+	while (*cur) {
+		struct btrfs_qgroup_swapped_block *entry;
+
+		parent = *cur;
+		entry = rb_entry(parent, struct btrfs_qgroup_swapped_block,
+				 node);
+
+		if (entry->subvol_bytenr < block->subvol_bytenr) {
+			cur = &(*cur)->rb_left;
+		} else if (entry->subvol_bytenr > block->subvol_bytenr) {
+			cur = &(*cur)->rb_right;
+		} else {
+			if (entry->subvol_generation !=
+					block->subvol_generation ||
+			    entry->reloc_bytenr != block->reloc_bytenr ||
+			    entry->reloc_generation !=
+					block->reloc_generation) {
+				/*
+				 * Duplicated but mismatch entry found.
+				 * Shouldn't happen.
+				 *
+				 * Marking qgroup inconsistent should be enough
+				 * for end users.
+				 */
+				WARN_ON(IS_ENABLED(CONFIG_BTRFS_DEBUG));
+				ret = -EEXIST;
+			}
+			kfree(block);
+			goto out_unlock;
+		}
+	}
+	rb_link_node(&block->node, parent, cur);
+	rb_insert_color(&block->node, &blocks->blocks[level]);
+	blocks->swapped = true;
+out_unlock:
+	spin_unlock(&blocks->lock);
+out:
+	if (ret < 0)
+		fs_info->qgroup_flags |=
+			BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
+	return ret;
+}
+
+/*
+ * Check if the tree block is a subtree root, and if so do the needed
+ * delayed subtree trace for qgroup.
+ *
+ * This is called during btrfs_cow_block().
+ */
+int btrfs_qgroup_trace_subtree_after_cow(struct btrfs_trans_handle *trans,
+					 struct btrfs_root *root,
+					 struct extent_buffer *subvol_eb)
+{
+	struct btrfs_fs_info *fs_info = root->fs_info;
+	struct btrfs_qgroup_swapped_blocks *blocks = &root->swapped_blocks;
+	struct btrfs_qgroup_swapped_block *block;
+	struct extent_buffer *reloc_eb = NULL;
+	struct rb_node *node;
+	bool found = false;
+	bool swapped = false;
+	int level = btrfs_header_level(subvol_eb);
+	int ret = 0;
+	int i;
+
+	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
+		return 0;
+	if (!is_fstree(root->root_key.objectid) || !root->reloc_root)
+		return 0;
+
+	spin_lock(&blocks->lock);
+	if (!blocks->swapped) {
+		spin_unlock(&blocks->lock);
+		return 0;
+	}
+	node = blocks->blocks[level].rb_node;
+
+	while (node) {
+		block = rb_entry(node, struct btrfs_qgroup_swapped_block, node);
+		if (block->subvol_bytenr < subvol_eb->start) {
+			node = node->rb_left;
+		} else if (block->subvol_bytenr > subvol_eb->start) {
+			node = node->rb_right;
+		} else {
+			found = true;
+			break;
+		}
+	}
+	if (!found) {
+		spin_unlock(&blocks->lock);
+		goto out;
+	}
+	/* Found one, remove it from @blocks first and update blocks->swapped */
+	rb_erase(&block->node, &blocks->blocks[level]);
+	for (i = 0; i < BTRFS_MAX_LEVEL; i++) {
+		if (RB_EMPTY_ROOT(&blocks->blocks[i])) {
+			swapped = true;
+			break;
+		}
+	}
+	blocks->swapped = swapped;
+	spin_unlock(&blocks->lock);
+
+	/* Read out reloc subtree root */
+	reloc_eb = read_tree_block(fs_info, block->reloc_bytenr,
+				   block->reloc_generation, block->level,
+				   &block->first_key);
+	if (IS_ERR(reloc_eb)) {
+		ret = PTR_ERR(reloc_eb);
+		reloc_eb = NULL;
+		goto free_out;
+	}
+	if (!extent_buffer_uptodate(reloc_eb)) {
+		ret = -EIO;
+		goto free_out;
+	}
+
+	ret = qgroup_trace_subtree_swap(trans, reloc_eb, subvol_eb,
+			block->last_snapshot, block->trace_leaf);
+free_out:
+	kfree(block);
+	free_extent_buffer(reloc_eb);
+out:
+	if (ret < 0) {
+		btrfs_err_rl(fs_info,
+			     "failed to account subtree at bytenr %llu: %d",
+			     subvol_eb->start, ret);
+		fs_info->qgroup_flags |= BTRFS_QGROUP_STATUS_FLAG_INCONSISTENT;
+	}
+	return ret;
+}
diff --git a/fs/btrfs/qgroup.h b/fs/btrfs/qgroup.h
index 20c6bd5fa701..46ba7bd2961c 100644
--- a/fs/btrfs/qgroup.h
+++ b/fs/btrfs/qgroup.h
@@ -6,6 +6,8 @@
 #ifndef BTRFS_QGROUP_H
 #define BTRFS_QGROUP_H
 
+#include <linux/spinlock.h>
+#include <linux/rbtree.h>
 #include "ulist.h"
 #include "delayed-ref.h"
 
@@ -38,6 +40,66 @@
  */
 
 /*
+ * Special performance optimization for balance.
+ *
+ * For balance, we need to swap subtree of subvolume and reloc trees.
+ * In theory, we need to trace all subtree blocks of both subvolume and reloc
+ * trees, since their owner has changed during such swap.
+ *
+ * However since balance has ensured that both subtrees are containing the
+ * same contents and have the same tree structures, such swap won't cause
+ * qgroup number change.
+ *
+ * But there is a race window between subtree swap and transaction commit,
+ * during that window, if we increase/decrease tree level or merge/split tree
+ * blocks, we still need to trace the original subtrees.
+ *
+ * So for balance, we use a delayed subtree tracing, whose workflow is:
+ *
+ * 1) Record the subtree root block get swapped.
+ *
+ *    During subtree swap:
+ *    O = Old tree blocks
+ *    N = New tree blocks
+ *          reloc tree                     subvolume tree X
+ *             Root                               Root
+ *            /    \                             /    \
+ *          NA     OB                          OA      OB
+ *        /  |     |  \                      /  |      |  \
+ *      NC  ND     OE  OF                   OC  OD     OE  OF
+ *
+ *   In this case, NA and OA are going to be swapped, record (NA, OA) into
+ *   subvolume tree X.
+ *
+ * 2) After subtree swap.
+ *          reloc tree                     subvolume tree X
+ *             Root                               Root
+ *            /    \                             /    \
+ *          OA     OB                          NA      OB
+ *        /  |     |  \                      /  |      |  \
+ *      OC  OD     OE  OF                   NC  ND     OE  OF
+ *
+ * 3a) COW happens for OB
+ *     If we are going to COW tree block OB, we check OB's bytenr against
+ *     tree X's swapped_blocks structure.
+ *     If it doesn't fit any, nothing will happen.
+ *
+ * 3b) COW happens for NA
+ *     Check NA's bytenr against tree X's swapped_blocks, and get a hit.
+ *     Then we do subtree scan on both subtrees OA and NA.
+ *     Resulting 6 tree blocks to be scanned (OA, OC, OD, NA, NC, ND).
+ *
+ *     Then no matter what we do to subvolume tree X, qgroup numbers will
+ *     still be correct.
+ *     Then NA's record gets removed from X's swapped_blocks.
+ *
+ * 4)  Transaction commit
+ *     Any record in X's swapped_blocks gets removed, since there is no
+ *     modification to the swapped subtrees, no need to trigger heavy qgroup
+ *     subtree rescan for them.
+ */
+
+/*
  * Record a dirty extent, and info qgroup to update quota on it
  * TODO: Use kmem cache to alloc it.
  */
@@ -45,9 +107,38 @@ struct btrfs_qgroup_extent_record {
 	struct rb_node node;
 	u64 bytenr;
 	u64 num_bytes;
+
+	/*
+	 * For qgroup reserved data space freeing.
+	 *
+	 * @data_rsv_refroot and @data_rsv will be recorded after
+	 * BTRFS_ADD_DELAYED_EXTENT is called.
+	 * And will be used to free reserved qgroup space at
+	 * transaction commit time.
+	 */
+	u32 data_rsv;		/* reserved data space needs to be freed */
+	u64 data_rsv_refroot;	/* which root the reserved data belongs to */
 	struct ulist *old_roots;
 };
 
+struct btrfs_qgroup_swapped_block {
+	struct rb_node node;
+
+	int level;
+	bool trace_leaf;
+
+	/* bytenr/generation of the tree block in subvolume tree after swap */
+	u64 subvol_bytenr;
+	u64 subvol_generation;
+
+	/* bytenr/generation of the tree block in reloc tree after swap */
+	u64 reloc_bytenr;
+	u64 reloc_generation;
+
+	u64 last_snapshot;
+	struct btrfs_key first_key;
+};
+
 /*
  * Qgroup reservation types:
  *
@@ -236,12 +327,6 @@ int btrfs_qgroup_trace_leaf_items(struct btrfs_trans_handle *trans,
 int btrfs_qgroup_trace_subtree(struct btrfs_trans_handle *trans,
 			       struct extent_buffer *root_eb,
 			       u64 root_gen, int root_level);
-
-int btrfs_qgroup_trace_subtree_swap(struct btrfs_trans_handle *trans,
-				struct btrfs_block_group_cache *bg_cache,
-				struct extent_buffer *src_parent, int src_slot,
-				struct extent_buffer *dst_parent, int dst_slot,
-				u64 last_snapshot);
 int btrfs_qgroup_account_extent(struct btrfs_trans_handle *trans, u64 bytenr,
 				u64 num_bytes, struct ulist *old_roots,
 				struct ulist *new_roots);
@@ -252,15 +337,6 @@ int btrfs_qgroup_inherit(struct btrfs_trans_handle *trans, u64 srcid,
 void btrfs_qgroup_free_refroot(struct btrfs_fs_info *fs_info,
 			       u64 ref_root, u64 num_bytes,
 			       enum btrfs_qgroup_rsv_type type);
-static inline void btrfs_qgroup_free_delayed_ref(struct btrfs_fs_info *fs_info,
-						 u64 ref_root, u64 num_bytes)
-{
-	if (!test_bit(BTRFS_FS_QUOTA_ENABLED, &fs_info->flags))
-		return;
-	trace_btrfs_qgroup_free_delayed_ref(fs_info, ref_root, num_bytes);
-	btrfs_qgroup_free_refroot(fs_info, ref_root, num_bytes,
-				  BTRFS_QGROUP_RSV_DATA);
-}
 
 #ifdef CONFIG_BTRFS_FS_RUN_SANITY_TESTS
 int btrfs_verify_qgroup_counts(struct btrfs_fs_info *fs_info, u64 qgroupid,
@@ -325,4 +401,18 @@ void btrfs_qgroup_convert_reserved_meta(struct btrfs_root *root, int num_bytes);
 
 void btrfs_qgroup_check_reserved_leak(struct inode *inode);
 
+/* btrfs_qgroup_swapped_blocks related functions */
+void btrfs_qgroup_init_swapped_blocks(
+	struct btrfs_qgroup_swapped_blocks *swapped_blocks);
+
+void btrfs_qgroup_clean_swapped_blocks(struct btrfs_root *root);
+int btrfs_qgroup_add_swapped_blocks(struct btrfs_trans_handle *trans,
+		struct btrfs_root *subvol_root,
+		struct btrfs_block_group_cache *bg,
+		struct extent_buffer *subvol_parent, int subvol_slot,
+		struct extent_buffer *reloc_parent, int reloc_slot,
+		u64 last_snapshot);
+int btrfs_qgroup_trace_subtree_after_cow(struct btrfs_trans_handle *trans,
+		struct btrfs_root *root, struct extent_buffer *eb);
+
 #endif
diff --git a/fs/btrfs/raid56.c b/fs/btrfs/raid56.c
index e74455eb42f9..f3d0576dd327 100644
--- a/fs/btrfs/raid56.c
+++ b/fs/btrfs/raid56.c
@@ -1442,11 +1442,11 @@ static int fail_bio_stripe(struct btrfs_raid_bio *rbio,
 static void set_bio_pages_uptodate(struct bio *bio)
 {
 	struct bio_vec *bvec;
-	int i;
+	struct bvec_iter_all iter_all;
 
 	ASSERT(!bio_flagged(bio, BIO_CLONED));
 
-	bio_for_each_segment_all(bvec, bio, i)
+	bio_for_each_segment_all(bvec, bio, iter_all)
 		SetPageUptodate(bvec->bv_page);
 }
 
@@ -2429,8 +2429,9 @@ static noinline void finish_parity_scrub(struct btrfs_raid_bio *rbio,
 			bitmap_clear(rbio->dbitmap, pagenr, 1);
 		kunmap(p);
 
-		for (stripe = 0; stripe < rbio->real_stripes; stripe++)
+		for (stripe = 0; stripe < nr_data; stripe++)
 			kunmap(page_in_rbio(rbio, stripe, pagenr, 0));
+		kunmap(p_page);
 	}
 
 	__free_page(p_page);
diff --git a/fs/btrfs/reada.c b/fs/btrfs/reada.c
index 10d9589001a9..bb5bd49573b4 100644
--- a/fs/btrfs/reada.c
+++ b/fs/btrfs/reada.c
@@ -747,6 +747,7 @@ static void __reada_start_machine(struct btrfs_fs_info *fs_info)
 	u64 total = 0;
 	int i;
 
+again:
 	do {
 		enqueued = 0;
 		mutex_lock(&fs_devices->device_list_mutex);
@@ -758,6 +759,10 @@ static void __reada_start_machine(struct btrfs_fs_info *fs_info)
 		mutex_unlock(&fs_devices->device_list_mutex);
 		total += enqueued;
 	} while (enqueued && total < 10000);
+	if (fs_devices->seed) {
+		fs_devices = fs_devices->seed;
+		goto again;
+	}
 
 	if (enqueued == 0)
 		return;
diff --git a/fs/btrfs/ref-verify.c b/fs/btrfs/ref-verify.c
index c3557c12656b..e87cbdad02a3 100644
--- a/fs/btrfs/ref-verify.c
+++ b/fs/btrfs/ref-verify.c
@@ -205,28 +205,17 @@ static struct root_entry *lookup_root_entry(struct rb_root *root, u64 objectid)
 #ifdef CONFIG_STACKTRACE
 static void __save_stack_trace(struct ref_action *ra)
 {
-	struct stack_trace stack_trace;
-
-	stack_trace.max_entries = MAX_TRACE;
-	stack_trace.nr_entries = 0;
-	stack_trace.entries = ra->trace;
-	stack_trace.skip = 2;
-	save_stack_trace(&stack_trace);
-	ra->trace_len = stack_trace.nr_entries;
+	ra->trace_len = stack_trace_save(ra->trace, MAX_TRACE, 2);
 }
 
 static void __print_stack_trace(struct btrfs_fs_info *fs_info,
 				struct ref_action *ra)
 {
-	struct stack_trace trace;
-
 	if (ra->trace_len == 0) {
 		btrfs_err(fs_info, "  ref-verify: no stacktrace");
 		return;
 	}
-	trace.nr_entries = ra->trace_len;
-	trace.entries = ra->trace;
-	print_stack_trace(&trace, 2);
+	stack_trace_print(ra->trace, ra->trace_len, 2);
 }
 #else
 static void inline __save_stack_trace(struct ref_action *ra)
@@ -520,6 +509,7 @@ static int process_leaf(struct btrfs_root *root,
 		switch (key.type) {
 		case BTRFS_EXTENT_ITEM_KEY:
 			*num_bytes = key.offset;
+			/* fall through */
 		case BTRFS_METADATA_ITEM_KEY:
 			*bytenr = key.objectid;
 			ret = process_extent_item(fs_info, path, &key, i,
@@ -583,7 +573,7 @@ static int walk_down_tree(struct btrfs_root *root, struct btrfs_path *path,
 				return -EIO;
 			}
 			btrfs_tree_read_lock(eb);
-			btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+			btrfs_set_lock_blocking_read(eb);
 			path->nodes[level-1] = eb;
 			path->slots[level-1] = 0;
 			path->locks[level-1] = BTRFS_READ_LOCK_BLOCKING;
@@ -670,36 +660,43 @@ static void dump_block_entry(struct btrfs_fs_info *fs_info,
 
 /*
  * btrfs_ref_tree_mod: called when we modify a ref for a bytenr
- * @root: the root we are making this modification from.
- * @bytenr: the bytenr we are modifying.
- * @num_bytes: number of bytes.
- * @parent: the parent bytenr.
- * @ref_root: the original root owner of the bytenr.
- * @owner: level in the case of metadata, inode in the case of data.
- * @offset: 0 for metadata, file offset for data.
- * @action: the action that we are doing, this is the same as the delayed ref
- *	action.
  *
  * This will add an action item to the given bytenr and do sanity checks to make
  * sure we haven't messed something up.  If we are making a new allocation and
  * this block entry has history we will delete all previous actions as long as
  * our sanity checks pass as they are no longer needed.
  */
-int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
-		       u64 parent, u64 ref_root, u64 owner, u64 offset,
-		       int action)
+int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
+		       struct btrfs_ref *generic_ref)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct ref_entry *ref = NULL, *exist;
 	struct ref_action *ra = NULL;
 	struct block_entry *be = NULL;
 	struct root_entry *re = NULL;
+	int action = generic_ref->action;
 	int ret = 0;
-	bool metadata = owner < BTRFS_FIRST_FREE_OBJECTID;
+	bool metadata;
+	u64 bytenr = generic_ref->bytenr;
+	u64 num_bytes = generic_ref->len;
+	u64 parent = generic_ref->parent;
+	u64 ref_root;
+	u64 owner;
+	u64 offset;
 
-	if (!btrfs_test_opt(root->fs_info, REF_VERIFY))
+	if (!btrfs_test_opt(fs_info, REF_VERIFY))
 		return 0;
 
+	if (generic_ref->type == BTRFS_REF_METADATA) {
+		ref_root = generic_ref->tree_ref.root;
+		owner = generic_ref->tree_ref.level;
+		offset = 0;
+	} else {
+		ref_root = generic_ref->data_ref.ref_root;
+		owner = generic_ref->data_ref.ino;
+		offset = generic_ref->data_ref.offset;
+	}
+	metadata = owner < BTRFS_FIRST_FREE_OBJECTID;
+
 	ref = kzalloc(sizeof(struct ref_entry), GFP_NOFS);
 	ra = kmalloc(sizeof(struct ref_action), GFP_NOFS);
 	if (!ra || !ref) {
@@ -732,7 +729,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
 
 	INIT_LIST_HEAD(&ra->list);
 	ra->action = action;
-	ra->root = root->root_key.objectid;
+	ra->root = generic_ref->real_root;
 
 	/*
 	 * This is an allocation, preallocate the block_entry in case we haven't
@@ -745,7 +742,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
 		 * is and the new root objectid, so let's not treat the passed
 		 * in root as if it really has a ref for this bytenr.
 		 */
-		be = add_block_entry(root->fs_info, bytenr, num_bytes, ref_root);
+		be = add_block_entry(fs_info, bytenr, num_bytes, ref_root);
 		if (IS_ERR(be)) {
 			kfree(ra);
 			ret = PTR_ERR(be);
@@ -787,13 +784,13 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
 			 * one we want to lookup below when we modify the
 			 * re->num_refs.
 			 */
-			ref_root = root->root_key.objectid;
-			re->root_objectid = root->root_key.objectid;
+			ref_root = generic_ref->real_root;
+			re->root_objectid = generic_ref->real_root;
 			re->num_refs = 0;
 		}
 
-		spin_lock(&root->fs_info->ref_verify_lock);
-		be = lookup_block_entry(&root->fs_info->block_tree, bytenr);
+		spin_lock(&fs_info->ref_verify_lock);
+		be = lookup_block_entry(&fs_info->block_tree, bytenr);
 		if (!be) {
 			btrfs_err(fs_info,
 "trying to do action %d to bytenr %llu num_bytes %llu but there is no existing entry!",
@@ -862,7 +859,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
 			 * didn't think of some other corner case.
 			 */
 			btrfs_err(fs_info, "failed to find root %llu for %llu",
-				  root->root_key.objectid, be->bytenr);
+				  generic_ref->real_root, be->bytenr);
 			dump_block_entry(fs_info, be);
 			dump_ref_action(fs_info, ra);
 			kfree(ra);
@@ -881,7 +878,7 @@ int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
 	list_add_tail(&ra->list, &be->actions);
 	ret = 0;
 out_unlock:
-	spin_unlock(&root->fs_info->ref_verify_lock);
+	spin_unlock(&fs_info->ref_verify_lock);
 out:
 	if (ret)
 		btrfs_clear_opt(fs_info->mount_opt, REF_VERIFY);
@@ -987,7 +984,7 @@ int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info)
 		return -ENOMEM;
 
 	eb = btrfs_read_lock_root_node(fs_info->extent_root);
-	btrfs_set_lock_blocking_rw(eb, BTRFS_READ_LOCK);
+	btrfs_set_lock_blocking_read(eb);
 	level = btrfs_header_level(eb);
 	path->nodes[level] = eb;
 	path->slots[level] = 0;
diff --git a/fs/btrfs/ref-verify.h b/fs/btrfs/ref-verify.h
index b7d2a4edfdb7..855de37719b5 100644
--- a/fs/btrfs/ref-verify.h
+++ b/fs/btrfs/ref-verify.h
@@ -9,9 +9,8 @@
 #ifdef CONFIG_BTRFS_FS_REF_VERIFY
 int btrfs_build_ref_tree(struct btrfs_fs_info *fs_info);
 void btrfs_free_ref_cache(struct btrfs_fs_info *fs_info);
-int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
-		       u64 parent, u64 ref_root, u64 owner, u64 offset,
-		       int action);
+int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
+		       struct btrfs_ref *generic_ref);
 void btrfs_free_ref_tree_range(struct btrfs_fs_info *fs_info, u64 start,
 			       u64 len);
 
@@ -30,9 +29,8 @@ static inline void btrfs_free_ref_cache(struct btrfs_fs_info *fs_info)
 {
 }
 
-static inline int btrfs_ref_tree_mod(struct btrfs_root *root, u64 bytenr,
-				     u64 num_bytes, u64 parent, u64 ref_root,
-				     u64 owner, u64 offset, int action)
+static inline int btrfs_ref_tree_mod(struct btrfs_fs_info *fs_info,
+		       struct btrfs_ref *generic_ref)
 {
 	return 0;
 }
diff --git a/fs/btrfs/relocation.c b/fs/btrfs/relocation.c
index 272b287f8cf0..22a3c69864fa 100644
--- a/fs/btrfs/relocation.c
+++ b/fs/btrfs/relocation.c
@@ -162,6 +162,8 @@ struct reloc_control {
 	struct mapping_tree reloc_root_tree;
 	/* list of reloc trees */
 	struct list_head reloc_roots;
+	/* list of subvolume trees that get relocated */
+	struct list_head dirty_subvol_roots;
 	/* size of metadata reservation for merging reloc trees */
 	u64 merging_rsv_size;
 	/* size of relocated tree nodes */
@@ -1467,15 +1469,17 @@ int btrfs_update_reloc_root(struct btrfs_trans_handle *trans,
 	struct btrfs_root_item *root_item;
 	int ret;
 
-	if (!root->reloc_root)
+	if (test_bit(BTRFS_ROOT_DEAD_RELOC_TREE, &root->state) ||
+	    !root->reloc_root)
 		goto out;
 
 	reloc_root = root->reloc_root;
 	root_item = &reloc_root->root_item;
 
+	/* root->reloc_root will stay until current relocation finished */
 	if (fs_info->reloc_ctl->merge_reloc_tree &&
 	    btrfs_root_refs(root_item) == 0) {
-		root->reloc_root = NULL;
+		set_bit(BTRFS_ROOT_DEAD_RELOC_TREE, &root->state);
 		__del_reloc_root(reloc_root);
 	}
 
@@ -1639,6 +1643,8 @@ int replace_file_extents(struct btrfs_trans_handle *trans,
 
 	nritems = btrfs_header_nritems(leaf);
 	for (i = 0; i < nritems; i++) {
+		struct btrfs_ref ref = { 0 };
+
 		cond_resched();
 		btrfs_item_key_to_cpu(leaf, &key, i);
 		if (key.type != BTRFS_EXTENT_DATA_KEY)
@@ -1699,18 +1705,23 @@ int replace_file_extents(struct btrfs_trans_handle *trans,
 		dirty = 1;
 
 		key.offset -= btrfs_file_extent_offset(leaf, fi);
-		ret = btrfs_inc_extent_ref(trans, root, new_bytenr,
-					   num_bytes, parent,
-					   btrfs_header_owner(leaf),
-					   key.objectid, key.offset);
+		btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, new_bytenr,
+				       num_bytes, parent);
+		ref.real_root = root->root_key.objectid;
+		btrfs_init_data_ref(&ref, btrfs_header_owner(leaf),
+				    key.objectid, key.offset);
+		ret = btrfs_inc_extent_ref(trans, &ref);
 		if (ret) {
 			btrfs_abort_transaction(trans, ret);
 			break;
 		}
 
-		ret = btrfs_free_extent(trans, root, bytenr, num_bytes,
-					parent, btrfs_header_owner(leaf),
-					key.objectid, key.offset);
+		btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF, bytenr,
+				       num_bytes, parent);
+		ref.real_root = root->root_key.objectid;
+		btrfs_init_data_ref(&ref, btrfs_header_owner(leaf),
+				    key.objectid, key.offset);
+		ret = btrfs_free_extent(trans, &ref);
 		if (ret) {
 			btrfs_abort_transaction(trans, ret);
 			break;
@@ -1752,6 +1763,7 @@ int replace_path(struct btrfs_trans_handle *trans, struct reloc_control *rc,
 	struct btrfs_fs_info *fs_info = dest->fs_info;
 	struct extent_buffer *eb;
 	struct extent_buffer *parent;
+	struct btrfs_ref ref = { 0 };
 	struct btrfs_key key;
 	u64 old_bytenr;
 	u64 new_bytenr;
@@ -1773,7 +1785,7 @@ again:
 	btrfs_node_key_to_cpu(path->nodes[lowest_level], &key, slot);
 
 	eb = btrfs_lock_root_node(dest);
-	btrfs_set_lock_blocking(eb);
+	btrfs_set_lock_blocking_write(eb);
 	level = btrfs_header_level(eb);
 
 	if (level < lowest_level) {
@@ -1786,7 +1798,7 @@ again:
 		ret = btrfs_cow_block(trans, dest, eb, NULL, 0, &eb);
 		BUG_ON(ret);
 	}
-	btrfs_set_lock_blocking(eb);
+	btrfs_set_lock_blocking_write(eb);
 
 	if (next_key) {
 		next_key->objectid = (u64)-1;
@@ -1802,6 +1814,8 @@ again:
 		BUG_ON(level < lowest_level);
 
 		ret = btrfs_bin_search(parent, &key, level, &slot);
+		if (ret < 0)
+			break;
 		if (ret && slot > 0)
 			slot--;
 
@@ -1852,7 +1866,7 @@ again:
 						      slot, &eb);
 				BUG_ON(ret);
 			}
-			btrfs_set_lock_blocking(eb);
+			btrfs_set_lock_blocking_write(eb);
 
 			btrfs_tree_unlock(parent);
 			free_extent_buffer(parent);
@@ -1885,15 +1899,18 @@ again:
 		 *    If not traced, we will leak data numbers
 		 * 2) Fs subtree
 		 *    If not traced, we will double count old data
-		 *    and tree block numbers, if current trans doesn't free
-		 *    data reloc tree inode.
+		 *
+		 * We don't scan the subtree right now, but only record
+		 * the swapped tree blocks.
+		 * The real subtree rescan is delayed until we have new
+		 * CoW on the subtree root node before transaction commit.
 		 */
-		ret = btrfs_qgroup_trace_subtree_swap(trans, rc->block_group,
-				parent, slot, path->nodes[level],
-				path->slots[level], last_snapshot);
+		ret = btrfs_qgroup_add_swapped_blocks(trans, dest,
+				rc->block_group, parent, slot,
+				path->nodes[level], path->slots[level],
+				last_snapshot);
 		if (ret < 0)
 			break;
-
 		/*
 		 * swap blocks in fs tree and reloc tree.
 		 */
@@ -1907,23 +1924,31 @@ again:
 					      path->slots[level], old_ptr_gen);
 		btrfs_mark_buffer_dirty(path->nodes[level]);
 
-		ret = btrfs_inc_extent_ref(trans, src, old_bytenr,
-					blocksize, path->nodes[level]->start,
-					src->root_key.objectid, level - 1, 0);
+		btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, old_bytenr,
+				       blocksize, path->nodes[level]->start);
+		ref.skip_qgroup = true;
+		btrfs_init_tree_ref(&ref, level - 1, src->root_key.objectid);
+		ret = btrfs_inc_extent_ref(trans, &ref);
 		BUG_ON(ret);
-		ret = btrfs_inc_extent_ref(trans, dest, new_bytenr,
-					blocksize, 0, dest->root_key.objectid,
-					level - 1, 0);
+		btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF, new_bytenr,
+				       blocksize, 0);
+		ref.skip_qgroup = true;
+		btrfs_init_tree_ref(&ref, level - 1, dest->root_key.objectid);
+		ret = btrfs_inc_extent_ref(trans, &ref);
 		BUG_ON(ret);
 
-		ret = btrfs_free_extent(trans, src, new_bytenr, blocksize,
-					path->nodes[level]->start,
-					src->root_key.objectid, level - 1, 0);
+		btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF, new_bytenr,
+				       blocksize, path->nodes[level]->start);
+		btrfs_init_tree_ref(&ref, level - 1, src->root_key.objectid);
+		ref.skip_qgroup = true;
+		ret = btrfs_free_extent(trans, &ref);
 		BUG_ON(ret);
 
-		ret = btrfs_free_extent(trans, dest, old_bytenr, blocksize,
-					0, dest->root_key.objectid, level - 1,
-					0);
+		btrfs_init_generic_ref(&ref, BTRFS_DROP_DELAYED_REF, old_bytenr,
+				       blocksize, 0);
+		btrfs_init_tree_ref(&ref, level - 1, dest->root_key.objectid);
+		ref.skip_qgroup = true;
+		ret = btrfs_free_extent(trans, &ref);
 		BUG_ON(ret);
 
 		btrfs_unlock_up_safe(path, 0);
@@ -2121,6 +2146,66 @@ static int find_next_key(struct btrfs_path *path, int level,
 }
 
 /*
+ * Insert current subvolume into reloc_control::dirty_subvol_roots
+ */
+static void insert_dirty_subvol(struct btrfs_trans_handle *trans,
+				struct reloc_control *rc,
+				struct btrfs_root *root)
+{
+	struct btrfs_root *reloc_root = root->reloc_root;
+	struct btrfs_root_item *reloc_root_item;
+
+	/* @root must be a subvolume tree root with a valid reloc tree */
+	ASSERT(root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID);
+	ASSERT(reloc_root);
+
+	reloc_root_item = &reloc_root->root_item;
+	memset(&reloc_root_item->drop_progress, 0,
+		sizeof(reloc_root_item->drop_progress));
+	reloc_root_item->drop_level = 0;
+	btrfs_set_root_refs(reloc_root_item, 0);
+	btrfs_update_reloc_root(trans, root);
+
+	if (list_empty(&root->reloc_dirty_list)) {
+		btrfs_grab_fs_root(root);
+		list_add_tail(&root->reloc_dirty_list, &rc->dirty_subvol_roots);
+	}
+}
+
+static int clean_dirty_subvols(struct reloc_control *rc)
+{
+	struct btrfs_root *root;
+	struct btrfs_root *next;
+	int ret = 0;
+	int ret2;
+
+	list_for_each_entry_safe(root, next, &rc->dirty_subvol_roots,
+				 reloc_dirty_list) {
+		if (root->root_key.objectid != BTRFS_TREE_RELOC_OBJECTID) {
+			/* Merged subvolume, cleanup its reloc root */
+			struct btrfs_root *reloc_root = root->reloc_root;
+
+			clear_bit(BTRFS_ROOT_DEAD_RELOC_TREE, &root->state);
+			list_del_init(&root->reloc_dirty_list);
+			root->reloc_root = NULL;
+			if (reloc_root) {
+
+				ret2 = btrfs_drop_snapshot(reloc_root, NULL, 0, 1);
+				if (ret2 < 0 && !ret)
+					ret = ret2;
+			}
+			btrfs_put_fs_root(root);
+		} else {
+			/* Orphan reloc tree, just clean it up */
+			ret2 = btrfs_drop_snapshot(root, NULL, 0, 1);
+			if (ret2 < 0 && !ret)
+				ret = ret2;
+		}
+	}
+	return ret;
+}
+
+/*
  * merge the relocated tree blocks in reloc tree with corresponding
  * fs tree.
  */
@@ -2128,7 +2213,6 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
 					       struct btrfs_root *root)
 {
 	struct btrfs_fs_info *fs_info = rc->extent_root->fs_info;
-	LIST_HEAD(inode_list);
 	struct btrfs_key key;
 	struct btrfs_key next_key;
 	struct btrfs_trans_handle *trans = NULL;
@@ -2259,13 +2343,8 @@ static noinline_for_stack int merge_reloc_root(struct reloc_control *rc,
 out:
 	btrfs_free_path(path);
 
-	if (err == 0) {
-		memset(&root_item->drop_progress, 0,
-		       sizeof(root_item->drop_progress));
-		root_item->drop_level = 0;
-		btrfs_set_root_refs(root_item, 0);
-		btrfs_update_reloc_root(trans, root);
-	}
+	if (err == 0)
+		insert_dirty_subvol(trans, rc, root);
 
 	if (trans)
 		btrfs_end_transaction_throttle(trans);
@@ -2409,14 +2488,9 @@ again:
 			}
 		} else {
 			list_del_init(&reloc_root->root_list);
-		}
-
-		ret = btrfs_drop_snapshot(reloc_root, rc->block_rsv, 0, 1);
-		if (ret < 0) {
-			if (list_empty(&reloc_root->root_list))
-				list_add_tail(&reloc_root->root_list,
-					      &reloc_roots);
-			goto out;
+			/* Don't forget to queue this reloc root for cleanup */
+			list_add_tail(&reloc_root->reloc_dirty_list,
+				      &rc->dirty_subvol_roots);
 		}
 	}
 
@@ -2674,6 +2748,7 @@ static int do_relocation(struct btrfs_trans_handle *trans,
 	rc->backref_cache.path[node->level] = node;
 	list_for_each_entry(edge, &node->upper, list[LOWER]) {
 		struct btrfs_key first_key;
+		struct btrfs_ref ref = { 0 };
 
 		cond_resched();
 
@@ -2685,6 +2760,10 @@ static int do_relocation(struct btrfs_trans_handle *trans,
 			if (!lowest) {
 				ret = btrfs_bin_search(upper->eb, key,
 						       upper->level, &slot);
+				if (ret < 0) {
+					err = ret;
+					goto next;
+				}
 				BUG_ON(ret);
 				bytenr = btrfs_node_blockptr(upper->eb, slot);
 				if (node->eb->start == bytenr)
@@ -2720,6 +2799,10 @@ static int do_relocation(struct btrfs_trans_handle *trans,
 		} else {
 			ret = btrfs_bin_search(upper->eb, key, upper->level,
 					       &slot);
+			if (ret < 0) {
+				err = ret;
+				goto next;
+			}
 			BUG_ON(ret);
 		}
 
@@ -2752,7 +2835,7 @@ static int do_relocation(struct btrfs_trans_handle *trans,
 			goto next;
 		}
 		btrfs_tree_lock(eb);
-		btrfs_set_lock_blocking(eb);
+		btrfs_set_lock_blocking_write(eb);
 
 		if (!node->eb) {
 			ret = btrfs_cow_block(trans, root, eb, upper->eb,
@@ -2771,11 +2854,13 @@ static int do_relocation(struct btrfs_trans_handle *trans,
 						      trans->transid);
 			btrfs_mark_buffer_dirty(upper->eb);
 
-			ret = btrfs_inc_extent_ref(trans, root,
-						node->eb->start, blocksize,
-						upper->eb->start,
-						btrfs_header_owner(upper->eb),
-						node->level, 0);
+			btrfs_init_generic_ref(&ref, BTRFS_ADD_DELAYED_REF,
+					       node->eb->start, blocksize,
+					       upper->eb->start);
+			ref.real_root = root->root_key.objectid;
+			btrfs_init_tree_ref(&ref, node->level,
+					    btrfs_header_owner(upper->eb));
+			ret = btrfs_inc_extent_ref(trans, &ref);
 			BUG_ON(ret);
 
 			ret = btrfs_drop_subtree(trans, root, eb, upper->eb);
@@ -4079,6 +4164,9 @@ restart:
 		goto out_free;
 	}
 	btrfs_commit_transaction(trans);
+	ret = clean_dirty_subvols(rc);
+	if (ret < 0 && !err)
+		err = ret;
 out_free:
 	btrfs_free_block_rsv(fs_info, rc->block_rsv);
 	btrfs_free_path(path);
@@ -4164,7 +4252,7 @@ out:
 	return inode;
 }
 
-static struct reloc_control *alloc_reloc_control(void)
+static struct reloc_control *alloc_reloc_control(struct btrfs_fs_info *fs_info)
 {
 	struct reloc_control *rc;
 
@@ -4173,9 +4261,11 @@ static struct reloc_control *alloc_reloc_control(void)
 		return NULL;
 
 	INIT_LIST_HEAD(&rc->reloc_roots);
+	INIT_LIST_HEAD(&rc->dirty_subvol_roots);
 	backref_cache_init(&rc->backref_cache);
 	mapping_tree_init(&rc->reloc_root_tree);
-	extent_io_tree_init(&rc->processed_blocks, NULL);
+	extent_io_tree_init(fs_info, &rc->processed_blocks,
+			    IO_TREE_RELOC_BLOCKS, NULL);
 	return rc;
 }
 
@@ -4217,7 +4307,7 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
 		return -ETXTBSY;
 	}
 
-	rc = alloc_reloc_control();
+	rc = alloc_reloc_control(fs_info);
 	if (!rc) {
 		btrfs_put_block_group(bg);
 		return -ENOMEM;
@@ -4239,7 +4329,7 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
 		goto out;
 	}
 
-	inode = lookup_free_space_inode(fs_info, rc->block_group, path);
+	inode = lookup_free_space_inode(rc->block_group, path);
 	btrfs_free_path(path);
 
 	if (!IS_ERR(inode))
@@ -4271,27 +4361,36 @@ int btrfs_relocate_block_group(struct btrfs_fs_info *fs_info, u64 group_start)
 		mutex_lock(&fs_info->cleaner_mutex);
 		ret = relocate_block_group(rc);
 		mutex_unlock(&fs_info->cleaner_mutex);
-		if (ret < 0) {
+		if (ret < 0)
 			err = ret;
-			goto out;
-		}
-
-		if (rc->extents_found == 0)
-			break;
-
-		btrfs_info(fs_info, "found %llu extents", rc->extents_found);
 
+		/*
+		 * We may have gotten ENOSPC after we already dirtied some
+		 * extents.  If writeout happens while we're relocating a
+		 * different block group we could end up hitting the
+		 * BUG_ON(rc->stage == UPDATE_DATA_PTRS) in
+		 * btrfs_reloc_cow_block.  Make sure we write everything out
+		 * properly so we don't trip over this problem, and then break
+		 * out of the loop if we hit an error.
+		 */
 		if (rc->stage == MOVE_DATA_EXTENTS && rc->found_file_extent) {
 			ret = btrfs_wait_ordered_range(rc->data_inode, 0,
 						       (u64)-1);
-			if (ret) {
+			if (ret)
 				err = ret;
-				goto out;
-			}
 			invalidate_mapping_pages(rc->data_inode->i_mapping,
 						 0, -1);
 			rc->stage = UPDATE_DATA_PTRS;
 		}
+
+		if (err < 0)
+			goto out;
+
+		if (rc->extents_found == 0)
+			break;
+
+		btrfs_info(fs_info, "found %llu extents", rc->extents_found);
+
 	}
 
 	WARN_ON(rc->block_group->pinned > 0);
@@ -4413,7 +4512,7 @@ int btrfs_recover_relocation(struct btrfs_root *root)
 	if (list_empty(&reloc_roots))
 		goto out;
 
-	rc = alloc_reloc_control();
+	rc = alloc_reloc_control(fs_info);
 	if (!rc) {
 		err = -ENOMEM;
 		goto out;
@@ -4468,6 +4567,10 @@ int btrfs_recover_relocation(struct btrfs_root *root)
 		goto out_free;
 	}
 	err = btrfs_commit_transaction(trans);
+
+	ret = clean_dirty_subvols(rc);
+	if (ret < 0 && !err)
+		err = ret;
 out_free:
 	kfree(rc);
 out:
@@ -4531,7 +4634,7 @@ int btrfs_reloc_clone_csums(struct inode *inode, u64 file_pos, u64 len)
 		new_bytenr = ordered->start + (sums->bytenr - disk_bytenr);
 		sums->bytenr = new_bytenr;
 
-		btrfs_add_ordered_sum(inode, ordered, sums);
+		btrfs_add_ordered_sum(ordered, sums);
 	}
 out:
 	btrfs_put_ordered_extent(ordered);
@@ -4604,14 +4707,12 @@ int btrfs_reloc_cow_block(struct btrfs_trans_handle *trans,
 void btrfs_reloc_pre_snapshot(struct btrfs_pending_snapshot *pending,
 			      u64 *bytes_to_reserve)
 {
-	struct btrfs_root *root;
-	struct reloc_control *rc;
+	struct btrfs_root *root = pending->root;
+	struct reloc_control *rc = root->fs_info->reloc_ctl;
 
-	root = pending->root;
-	if (!root->reloc_root)
+	if (!root->reloc_root || !rc)
 		return;
 
-	rc = root->fs_info->reloc_ctl;
 	if (!rc->merge_reloc_tree)
 		return;
 
@@ -4640,10 +4741,10 @@ int btrfs_reloc_post_snapshot(struct btrfs_trans_handle *trans,
 	struct btrfs_root *root = pending->root;
 	struct btrfs_root *reloc_root;
 	struct btrfs_root *new_root;
-	struct reloc_control *rc;
+	struct reloc_control *rc = root->fs_info->reloc_ctl;
 	int ret;
 
-	if (!root->reloc_root)
+	if (!root->reloc_root || !rc)
 		return 0;
 
 	rc = root->fs_info->reloc_ctl;
diff --git a/fs/btrfs/root-tree.c b/fs/btrfs/root-tree.c
index 65bda0682928..22124122728c 100644
--- a/fs/btrfs/root-tree.c
+++ b/fs/btrfs/root-tree.c
@@ -21,12 +21,12 @@ static void btrfs_read_root_item(struct extent_buffer *eb, int slot,
 				struct btrfs_root_item *item)
 {
 	uuid_le uuid;
-	int len;
+	u32 len;
 	int need_reset = 0;
 
 	len = btrfs_item_size_nr(eb, slot);
 	read_extent_buffer(eb, item, btrfs_item_ptr_offset(eb, slot),
-			min_t(int, len, (int)sizeof(*item)));
+			   min_t(u32, len, sizeof(*item)));
 	if (len < sizeof(*item))
 		need_reset = 1;
 	if (!need_reset && btrfs_root_generation(item)
@@ -132,16 +132,17 @@ int btrfs_update_root(struct btrfs_trans_handle *trans, struct btrfs_root
 		return -ENOMEM;
 
 	ret = btrfs_search_slot(trans, root, key, path, 0, 1);
-	if (ret < 0) {
-		btrfs_abort_transaction(trans, ret);
+	if (ret < 0)
 		goto out;
-	}
 
-	if (ret != 0) {
-		btrfs_print_leaf(path->nodes[0]);
-		btrfs_crit(fs_info, "unable to update root key %llu %u %llu",
-			   key->objectid, key->type, key->offset);
-		BUG_ON(1);
+	if (ret > 0) {
+		btrfs_crit(fs_info,
+			"unable to find root key (%llu %u %llu) in tree %llu",
+			key->objectid, key->type, key->offset,
+			root->root_key.objectid);
+		ret = -EUCLEAN;
+		btrfs_abort_transaction(trans, ret);
+		goto out;
 	}
 
 	l = path->nodes[0];
@@ -263,8 +264,10 @@ int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info)
 		if (root) {
 			WARN_ON(!test_bit(BTRFS_ROOT_ORPHAN_ITEM_INSERTED,
 					  &root->state));
-			if (btrfs_root_refs(&root->root_item) == 0)
+			if (btrfs_root_refs(&root->root_item) == 0) {
+				set_bit(BTRFS_ROOT_DEAD_TREE, &root->state);
 				btrfs_add_dead_root(root);
+			}
 			continue;
 		}
 
@@ -310,8 +313,10 @@ int btrfs_find_orphan_roots(struct btrfs_fs_info *fs_info)
 			break;
 		}
 
-		if (btrfs_root_refs(&root->root_item) == 0)
+		if (btrfs_root_refs(&root->root_item) == 0) {
+			set_bit(BTRFS_ROOT_DEAD_TREE, &root->state);
 			btrfs_add_dead_root(root);
+		}
 	}
 
 	btrfs_free_path(path);
diff --git a/fs/btrfs/scrub.c b/fs/btrfs/scrub.c
index 6dcd36d7b849..f7b29f9db5e2 100644
--- a/fs/btrfs/scrub.c
+++ b/fs/btrfs/scrub.c
@@ -584,6 +584,7 @@ static noinline_for_stack struct scrub_ctx *scrub_setup_ctx(
 	sctx->pages_per_rd_bio = SCRUB_PAGES_PER_RD_BIO;
 	sctx->curr = -1;
 	sctx->fs_info = fs_info;
+	INIT_LIST_HEAD(&sctx->csum_list);
 	for (i = 0; i < SCRUB_BIOS_PER_SCTX; ++i) {
 		struct scrub_bio *sbio;
 
@@ -608,7 +609,6 @@ static noinline_for_stack struct scrub_ctx *scrub_setup_ctx(
 	atomic_set(&sctx->workers_pending, 0);
 	atomic_set(&sctx->cancel_req, 0);
 	sctx->csum_size = btrfs_super_csum_size(fs_info->super_copy);
-	INIT_LIST_HEAD(&sctx->csum_list);
 
 	spin_lock_init(&sctx->list_lock);
 	spin_lock_init(&sctx->stat_lock);
@@ -3741,25 +3741,33 @@ static noinline_for_stack int scrub_workers_get(struct btrfs_fs_info *fs_info,
 	unsigned int flags = WQ_FREEZABLE | WQ_UNBOUND;
 	int max_active = fs_info->thread_pool_size;
 
-	if (fs_info->scrub_workers_refcnt == 0) {
+	lockdep_assert_held(&fs_info->scrub_lock);
+
+	if (refcount_read(&fs_info->scrub_workers_refcnt) == 0) {
+		ASSERT(fs_info->scrub_workers == NULL);
 		fs_info->scrub_workers = btrfs_alloc_workqueue(fs_info, "scrub",
 				flags, is_dev_replace ? 1 : max_active, 4);
 		if (!fs_info->scrub_workers)
 			goto fail_scrub_workers;
 
+		ASSERT(fs_info->scrub_wr_completion_workers == NULL);
 		fs_info->scrub_wr_completion_workers =
 			btrfs_alloc_workqueue(fs_info, "scrubwrc", flags,
 					      max_active, 2);
 		if (!fs_info->scrub_wr_completion_workers)
 			goto fail_scrub_wr_completion_workers;
 
+		ASSERT(fs_info->scrub_parity_workers == NULL);
 		fs_info->scrub_parity_workers =
 			btrfs_alloc_workqueue(fs_info, "scrubparity", flags,
 					      max_active, 2);
 		if (!fs_info->scrub_parity_workers)
 			goto fail_scrub_parity_workers;
+
+		refcount_set(&fs_info->scrub_workers_refcnt, 1);
+	} else {
+		refcount_inc(&fs_info->scrub_workers_refcnt);
 	}
-	++fs_info->scrub_workers_refcnt;
 	return 0;
 
 fail_scrub_parity_workers:
@@ -3770,16 +3778,6 @@ fail_scrub_workers:
 	return -ENOMEM;
 }
 
-static noinline_for_stack void scrub_workers_put(struct btrfs_fs_info *fs_info)
-{
-	if (--fs_info->scrub_workers_refcnt == 0) {
-		btrfs_destroy_workqueue(fs_info->scrub_workers);
-		btrfs_destroy_workqueue(fs_info->scrub_wr_completion_workers);
-		btrfs_destroy_workqueue(fs_info->scrub_parity_workers);
-	}
-	WARN_ON(fs_info->scrub_workers_refcnt < 0);
-}
-
 int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 		    u64 end, struct btrfs_scrub_progress *progress,
 		    int readonly, int is_dev_replace)
@@ -3788,9 +3786,12 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 	int ret;
 	struct btrfs_device *dev;
 	unsigned int nofs_flag;
+	struct btrfs_workqueue *scrub_workers = NULL;
+	struct btrfs_workqueue *scrub_wr_comp = NULL;
+	struct btrfs_workqueue *scrub_parity = NULL;
 
 	if (btrfs_fs_closing(fs_info))
-		return -EINVAL;
+		return -EAGAIN;
 
 	if (fs_info->nodesize > BTRFS_STRIPE_LEN) {
 		/*
@@ -3835,7 +3836,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 		return PTR_ERR(sctx);
 
 	mutex_lock(&fs_info->fs_devices->device_list_mutex);
-	dev = btrfs_find_device(fs_info, devid, NULL, NULL);
+	dev = btrfs_find_device(fs_info->fs_devices, devid, NULL, NULL, true);
 	if (!dev || (test_bit(BTRFS_DEV_STATE_MISSING, &dev->dev_state) &&
 		     !is_dev_replace)) {
 		mutex_unlock(&fs_info->fs_devices->device_list_mutex);
@@ -3903,6 +3904,7 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 	 */
 	nofs_flag = memalloc_nofs_save();
 	if (!is_dev_replace) {
+		btrfs_info(fs_info, "scrub: started on devid %llu", devid);
 		/*
 		 * by holding device list mutex, we can
 		 * kick off writing super in log tree sync.
@@ -3925,11 +3927,26 @@ int btrfs_scrub_dev(struct btrfs_fs_info *fs_info, u64 devid, u64 start,
 	if (progress)
 		memcpy(progress, &sctx->stat, sizeof(*progress));
 
+	if (!is_dev_replace)
+		btrfs_info(fs_info, "scrub: %s on devid %llu with status: %d",
+			ret ? "not finished" : "finished", devid, ret);
+
 	mutex_lock(&fs_info->scrub_lock);
 	dev->scrub_ctx = NULL;
-	scrub_workers_put(fs_info);
+	if (refcount_dec_and_test(&fs_info->scrub_workers_refcnt)) {
+		scrub_workers = fs_info->scrub_workers;
+		scrub_wr_comp = fs_info->scrub_wr_completion_workers;
+		scrub_parity = fs_info->scrub_parity_workers;
+
+		fs_info->scrub_workers = NULL;
+		fs_info->scrub_wr_completion_workers = NULL;
+		fs_info->scrub_parity_workers = NULL;
+	}
 	mutex_unlock(&fs_info->scrub_lock);
 
+	btrfs_destroy_workqueue(scrub_workers);
+	btrfs_destroy_workqueue(scrub_wr_comp);
+	btrfs_destroy_workqueue(scrub_parity);
 	scrub_put_ctx(sctx);
 
 	return ret;
@@ -3982,9 +3999,9 @@ int btrfs_scrub_cancel(struct btrfs_fs_info *fs_info)
 	return 0;
 }
 
-int btrfs_scrub_cancel_dev(struct btrfs_fs_info *fs_info,
-			   struct btrfs_device *dev)
+int btrfs_scrub_cancel_dev(struct btrfs_device *dev)
 {
+	struct btrfs_fs_info *fs_info = dev->fs_info;
 	struct scrub_ctx *sctx;
 
 	mutex_lock(&fs_info->scrub_lock);
@@ -4012,7 +4029,7 @@ int btrfs_scrub_progress(struct btrfs_fs_info *fs_info, u64 devid,
 	struct scrub_ctx *sctx = NULL;
 
 	mutex_lock(&fs_info->fs_devices->device_list_mutex);
-	dev = btrfs_find_device(fs_info, devid, NULL, NULL);
+	dev = btrfs_find_device(fs_info->fs_devices, devid, NULL, NULL, true);
 	if (dev)
 		sctx = dev->scrub_ctx;
 	if (sctx)
diff --git a/fs/btrfs/send.c b/fs/btrfs/send.c
index 7ea2d6b1f170..f7fe4770f0e5 100644
--- a/fs/btrfs/send.c
+++ b/fs/btrfs/send.c
@@ -1160,7 +1160,6 @@ out:
 struct backref_ctx {
 	struct send_ctx *sctx;
 
-	struct btrfs_path *path;
 	/* number of total found references */
 	u64 found;
 
@@ -1213,8 +1212,6 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_)
 {
 	struct backref_ctx *bctx = ctx_;
 	struct clone_root *found;
-	int ret;
-	u64 i_size;
 
 	/* First check if the root is in the list of accepted clone sources */
 	found = bsearch((void *)(uintptr_t)root, bctx->sctx->clone_roots,
@@ -1231,19 +1228,6 @@ static int __iterate_backrefs(u64 ino, u64 offset, u64 root, void *ctx_)
 	}
 
 	/*
-	 * There are inodes that have extents that lie behind its i_size. Don't
-	 * accept clones from these extents.
-	 */
-	ret = __get_inode_info(found->root, bctx->path, ino, &i_size, NULL, NULL,
-			       NULL, NULL, NULL);
-	btrfs_release_path(bctx->path);
-	if (ret < 0)
-		return ret;
-
-	if (offset + bctx->data_offset + bctx->extent_len > i_size)
-		return 0;
-
-	/*
 	 * Make sure we don't consider clones from send_root that are
 	 * behind the current inode/offset.
 	 */
@@ -1319,8 +1303,6 @@ static int find_extent_clone(struct send_ctx *sctx,
 		goto out;
 	}
 
-	backref_ctx->path = tmp_path;
-
 	if (data_offset >= ino_size) {
 		/*
 		 * There may be extents that lie behind the file's size.
@@ -5017,6 +4999,12 @@ static int send_hole(struct send_ctx *sctx, u64 end)
 	if (offset >= sctx->cur_inode_size)
 		return 0;
 
+	/*
+	 * Don't go beyond the inode's i_size due to prealloc extents that start
+	 * after the i_size.
+	 */
+	end = min_t(u64, end, sctx->cur_inode_size);
+
 	if (sctx->flags & BTRFS_SEND_FLAG_NO_FILE_DATA)
 		return send_update_extent(sctx, offset, end - offset);
 
@@ -5082,6 +5070,7 @@ static int clone_range(struct send_ctx *sctx,
 	struct btrfs_path *path;
 	struct btrfs_key key;
 	int ret;
+	u64 clone_src_i_size;
 
 	/*
 	 * Prevent cloning from a zero offset with a length matching the sector
@@ -5107,6 +5096,16 @@ static int clone_range(struct send_ctx *sctx,
 		return -ENOMEM;
 
 	/*
+	 * There are inodes that have extents that lie behind its i_size. Don't
+	 * accept clones from these extents.
+	 */
+	ret = __get_inode_info(clone_root->root, path, clone_root->ino,
+			       &clone_src_i_size, NULL, NULL, NULL, NULL, NULL);
+	btrfs_release_path(path);
+	if (ret < 0)
+		goto out;
+
+	/*
 	 * We can't send a clone operation for the entire range if we find
 	 * extent items in the respective range in the source file that
 	 * refer to different extents or if we find holes.
@@ -5148,6 +5147,7 @@ static int clone_range(struct send_ctx *sctx,
 		u8 type;
 		u64 ext_len;
 		u64 clone_len;
+		u64 clone_data_offset;
 
 		if (slot >= btrfs_header_nritems(leaf)) {
 			ret = btrfs_next_leaf(clone_root->root, path);
@@ -5201,13 +5201,73 @@ static int clone_range(struct send_ctx *sctx,
 		if (key.offset >= clone_root->offset + len)
 			break;
 
+		if (key.offset >= clone_src_i_size)
+			break;
+
+		if (key.offset + ext_len > clone_src_i_size)
+			ext_len = clone_src_i_size - key.offset;
+
+		clone_data_offset = btrfs_file_extent_offset(leaf, ei);
+		if (btrfs_file_extent_disk_bytenr(leaf, ei) == disk_byte) {
+			clone_root->offset = key.offset;
+			if (clone_data_offset < data_offset &&
+				clone_data_offset + ext_len > data_offset) {
+				u64 extent_offset;
+
+				extent_offset = data_offset - clone_data_offset;
+				ext_len -= extent_offset;
+				clone_data_offset += extent_offset;
+				clone_root->offset += extent_offset;
+			}
+		}
+
 		clone_len = min_t(u64, ext_len, len);
 
 		if (btrfs_file_extent_disk_bytenr(leaf, ei) == disk_byte &&
-		    btrfs_file_extent_offset(leaf, ei) == data_offset)
-			ret = send_clone(sctx, offset, clone_len, clone_root);
-		else
+		    clone_data_offset == data_offset) {
+			const u64 src_end = clone_root->offset + clone_len;
+			const u64 sectorsize = SZ_64K;
+
+			/*
+			 * We can't clone the last block, when its size is not
+			 * sector size aligned, into the middle of a file. If we
+			 * do so, the receiver will get a failure (-EINVAL) when
+			 * trying to clone or will silently corrupt the data in
+			 * the destination file if it's on a kernel without the
+			 * fix introduced by commit ac765f83f1397646
+			 * ("Btrfs: fix data corruption due to cloning of eof
+			 * block).
+			 *
+			 * So issue a clone of the aligned down range plus a
+			 * regular write for the eof block, if we hit that case.
+			 *
+			 * Also, we use the maximum possible sector size, 64K,
+			 * because we don't know what's the sector size of the
+			 * filesystem that receives the stream, so we have to
+			 * assume the largest possible sector size.
+			 */
+			if (src_end == clone_src_i_size &&
+			    !IS_ALIGNED(src_end, sectorsize) &&
+			    offset + clone_len < sctx->cur_inode_size) {
+				u64 slen;
+
+				slen = ALIGN_DOWN(src_end - clone_root->offset,
+						  sectorsize);
+				if (slen > 0) {
+					ret = send_clone(sctx, offset, slen,
+							 clone_root);
+					if (ret < 0)
+						goto out;
+				}
+				ret = send_extent_data(sctx, offset + slen,
+						       clone_len - slen);
+			} else {
+				ret = send_clone(sctx, offset, clone_len,
+						 clone_root);
+			}
+		} else {
 			ret = send_extent_data(sctx, offset, clone_len);
+		}
 
 		if (ret < 0)
 			goto out;
@@ -6579,6 +6639,38 @@ commit_trans:
 	return btrfs_commit_transaction(trans);
 }
 
+/*
+ * Make sure any existing dellaloc is flushed for any root used by a send
+ * operation so that we do not miss any data and we do not race with writeback
+ * finishing and changing a tree while send is using the tree. This could
+ * happen if a subvolume is in RW mode, has delalloc, is turned to RO mode and
+ * a send operation then uses the subvolume.
+ * After flushing delalloc ensure_commit_roots_uptodate() must be called.
+ */
+static int flush_delalloc_roots(struct send_ctx *sctx)
+{
+	struct btrfs_root *root = sctx->parent_root;
+	int ret;
+	int i;
+
+	if (root) {
+		ret = btrfs_start_delalloc_snapshot(root);
+		if (ret)
+			return ret;
+		btrfs_wait_ordered_extents(root, U64_MAX, 0, U64_MAX);
+	}
+
+	for (i = 0; i < sctx->clone_roots_cnt; i++) {
+		root = sctx->clone_roots[i].root;
+		ret = btrfs_start_delalloc_snapshot(root);
+		if (ret)
+			return ret;
+		btrfs_wait_ordered_extents(root, U64_MAX, 0, U64_MAX);
+	}
+
+	return 0;
+}
+
 static void btrfs_root_dec_send_in_progress(struct btrfs_root* root)
 {
 	spin_lock(&root->root_item_lock);
@@ -6594,6 +6686,13 @@ static void btrfs_root_dec_send_in_progress(struct btrfs_root* root)
 	spin_unlock(&root->root_item_lock);
 }
 
+static void dedupe_in_progress_warn(const struct btrfs_root *root)
+{
+	btrfs_warn_rl(root->fs_info,
+"cannot use root %llu for send while deduplications on it are in progress (%d in progress)",
+		      root->root_key.objectid, root->dedupe_in_progress);
+}
+
 long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
 {
 	int ret = 0;
@@ -6617,6 +6716,11 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
 	 * making it RW. This also protects against deletion.
 	 */
 	spin_lock(&send_root->root_item_lock);
+	if (btrfs_root_readonly(send_root) && send_root->dedupe_in_progress) {
+		dedupe_in_progress_warn(send_root);
+		spin_unlock(&send_root->root_item_lock);
+		return -EAGAIN;
+	}
 	send_root->send_in_progress++;
 	spin_unlock(&send_root->root_item_lock);
 
@@ -6751,6 +6855,13 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
 				ret = -EPERM;
 				goto out;
 			}
+			if (clone_root->dedupe_in_progress) {
+				dedupe_in_progress_warn(clone_root);
+				spin_unlock(&clone_root->root_item_lock);
+				srcu_read_unlock(&fs_info->subvol_srcu, index);
+				ret = -EAGAIN;
+				goto out;
+			}
 			clone_root->send_in_progress++;
 			spin_unlock(&clone_root->root_item_lock);
 			srcu_read_unlock(&fs_info->subvol_srcu, index);
@@ -6785,6 +6896,13 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
 			ret = -EPERM;
 			goto out;
 		}
+		if (sctx->parent_root->dedupe_in_progress) {
+			dedupe_in_progress_warn(sctx->parent_root);
+			spin_unlock(&sctx->parent_root->root_item_lock);
+			srcu_read_unlock(&fs_info->subvol_srcu, index);
+			ret = -EAGAIN;
+			goto out;
+		}
 		spin_unlock(&sctx->parent_root->root_item_lock);
 
 		srcu_read_unlock(&fs_info->subvol_srcu, index);
@@ -6803,6 +6921,10 @@ long btrfs_ioctl_send(struct file *mnt_file, struct btrfs_ioctl_send_args *arg)
 			NULL);
 	sort_clone_roots = 1;
 
+	ret = flush_delalloc_roots(sctx);
+	if (ret)
+		goto out;
+
 	ret = ensure_commit_roots_uptodate(sctx);
 	if (ret)
 		goto out;
diff --git a/fs/btrfs/super.c b/fs/btrfs/super.c
index 0a3f122dd61f..0645ec428b4f 100644
--- a/fs/btrfs/super.c
+++ b/fs/btrfs/super.c
@@ -529,7 +529,9 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
 				if (token != Opt_compress &&
 				    token != Opt_compress_force)
 					info->compress_level =
-					  btrfs_compress_str2level(args[0].from);
+					  btrfs_compress_str2level(
+							BTRFS_COMPRESS_ZLIB,
+							args[0].from + 4);
 				btrfs_set_opt(info->mount_opt, COMPRESS);
 				btrfs_clear_opt(info->mount_opt, NODATACOW);
 				btrfs_clear_opt(info->mount_opt, NODATASUM);
@@ -542,9 +544,13 @@ int btrfs_parse_options(struct btrfs_fs_info *info, char *options,
 				btrfs_clear_opt(info->mount_opt, NODATASUM);
 				btrfs_set_fs_incompat(info, COMPRESS_LZO);
 				no_compress = 0;
-			} else if (strcmp(args[0].from, "zstd") == 0) {
+			} else if (strncmp(args[0].from, "zstd", 4) == 0) {
 				compress_type = "zstd";
 				info->compress_type = BTRFS_COMPRESS_ZSTD;
+				info->compress_level =
+					btrfs_compress_str2level(
+							 BTRFS_COMPRESS_ZSTD,
+							 args[0].from + 4);
 				btrfs_set_opt(info->mount_opt, COMPRESS);
 				btrfs_clear_opt(info->mount_opt, NODATACOW);
 				btrfs_clear_opt(info->mount_opt, NODATASUM);
@@ -1394,7 +1400,7 @@ static inline int is_subvolume_inode(struct inode *inode)
 }
 
 static struct dentry *mount_subvol(const char *subvol_name, u64 subvol_objectid,
-				   const char *device_name, struct vfsmount *mnt)
+				   struct vfsmount *mnt)
 {
 	struct dentry *root;
 	int ret;
@@ -1643,7 +1649,7 @@ static struct dentry *btrfs_mount(struct file_system_type *fs_type, int flags,
 	}
 
 	/* mount_subvol() will free subvol_name and mnt_root */
-	root = mount_subvol(subvol_name, subvol_objectid, device_name, mnt_root);
+	root = mount_subvol(subvol_name, subvol_objectid, mnt_root);
 
 out:
 	return root;
@@ -2190,6 +2196,9 @@ static long btrfs_control_ioctl(struct file *file, unsigned int cmd,
 		ret = PTR_ERR_OR_ZERO(device);
 		mutex_unlock(&uuid_mutex);
 		break;
+	case BTRFS_IOC_FORGET_DEV:
+		ret = btrfs_forget_devices(vol->name);
+		break;
 	case BTRFS_IOC_DEVICES_READY:
 		mutex_lock(&uuid_mutex);
 		device = btrfs_scan_one_device(vol->name, FMODE_READ,
@@ -2289,6 +2298,7 @@ static const struct super_operations btrfs_super_ops = {
 	.show_devname	= btrfs_show_devname,
 	.alloc_inode	= btrfs_alloc_inode,
 	.destroy_inode	= btrfs_destroy_inode,
+	.free_inode	= btrfs_free_inode,
 	.statfs		= btrfs_statfs,
 	.remount_fs	= btrfs_remount,
 	.freeze_fs	= btrfs_freeze,
diff --git a/fs/btrfs/sysfs.c b/fs/btrfs/sysfs.c
index 5a5930e3d32b..c1dfc97893ba 100644
--- a/fs/btrfs/sysfs.c
+++ b/fs/btrfs/sysfs.c
@@ -303,11 +303,12 @@ static ssize_t raid_bytes_show(struct kobject *kobj,
 	return snprintf(buf, PAGE_SIZE, "%llu\n", val);
 }
 
-static struct attribute *raid_attributes[] = {
+static struct attribute *raid_attrs[] = {
 	BTRFS_ATTR_PTR(raid, total_bytes),
 	BTRFS_ATTR_PTR(raid, used_bytes),
 	NULL
 };
+ATTRIBUTE_GROUPS(raid);
 
 static void release_raid_kobj(struct kobject *kobj)
 {
@@ -317,7 +318,7 @@ static void release_raid_kobj(struct kobject *kobj)
 struct kobj_type btrfs_raid_ktype = {
 	.sysfs_ops = &kobj_sysfs_ops,
 	.release = release_raid_kobj,
-	.default_attrs = raid_attributes,
+	.default_groups = raid_groups,
 };
 
 #define SPACE_INFO_ATTR(field)						\
@@ -364,6 +365,7 @@ static struct attribute *space_info_attrs[] = {
 	BTRFS_ATTR_PTR(space_info, total_bytes_pinned),
 	NULL,
 };
+ATTRIBUTE_GROUPS(space_info);
 
 static void space_info_release(struct kobject *kobj)
 {
@@ -375,7 +377,7 @@ static void space_info_release(struct kobject *kobj)
 struct kobj_type space_info_ktype = {
 	.sysfs_ops = &kobj_sysfs_ops,
 	.release = space_info_release,
-	.default_attrs = space_info_attrs,
+	.default_groups = space_info_groups,
 };
 
 static const struct attribute *allocation_attrs[] = {
@@ -825,7 +827,12 @@ int btrfs_sysfs_add_fsid(struct btrfs_fs_devices *fs_devs,
 	fs_devs->fsid_kobj.kset = btrfs_kset;
 	error = kobject_init_and_add(&fs_devs->fsid_kobj,
 				&btrfs_ktype, parent, "%pU", fs_devs->fsid);
-	return error;
+	if (error) {
+		kobject_put(&fs_devs->fsid_kobj);
+		return error;
+	}
+
+	return 0;
 }
 
 int btrfs_sysfs_add_mounted(struct btrfs_fs_info *fs_info)
@@ -905,12 +912,10 @@ void btrfs_sysfs_feature_update(struct btrfs_fs_info *fs_info,
 	ret = sysfs_create_group(fsid_kobj, &btrfs_feature_attr_group);
 }
 
-static int btrfs_init_debugfs(void)
+static void btrfs_init_debugfs(void)
 {
 #ifdef CONFIG_DEBUG_FS
 	btrfs_debugfs_root_dentry = debugfs_create_dir("btrfs", NULL);
-	if (!btrfs_debugfs_root_dentry)
-		return -ENOMEM;
 
 	/*
 	 * Example code, how to export data through debugfs.
@@ -924,7 +929,6 @@ static int btrfs_init_debugfs(void)
 #endif
 
 #endif
-	return 0;
 }
 
 int __init btrfs_init_sysfs(void)
@@ -935,9 +939,7 @@ int __init btrfs_init_sysfs(void)
 	if (!btrfs_kset)
 		return -ENOMEM;
 
-	ret = btrfs_init_debugfs();
-	if (ret)
-		goto out1;
+	btrfs_init_debugfs();
 
 	init_feature_attrs();
 	ret = sysfs_create_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
@@ -954,7 +956,6 @@ out_remove_group:
 	sysfs_remove_group(&btrfs_kset->kobj, &btrfs_feature_attr_group);
 out2:
 	debugfs_remove_recursive(btrfs_debugfs_root_dentry);
-out1:
 	kset_unregister(btrfs_kset);
 
 	return ret;
diff --git a/fs/btrfs/tests/btrfs-tests.c b/fs/btrfs/tests/btrfs-tests.c
index 8a59597f1883..9238fd4f1734 100644
--- a/fs/btrfs/tests/btrfs-tests.c
+++ b/fs/btrfs/tests/btrfs-tests.c
@@ -17,6 +17,16 @@
 
 static struct vfsmount *test_mnt = NULL;
 
+const char *test_error[] = {
+	[TEST_ALLOC_FS_INFO]	     = "cannot allocate fs_info",
+	[TEST_ALLOC_ROOT]	     = "cannot allocate root",
+	[TEST_ALLOC_EXTENT_BUFFER]   = "cannot extent buffer",
+	[TEST_ALLOC_PATH]	     = "cannot allocate path",
+	[TEST_ALLOC_INODE]	     = "cannot allocate inode",
+	[TEST_ALLOC_BLOCK_GROUP]     = "cannot allocate block group",
+	[TEST_ALLOC_EXTENT_MAP]      = "cannot allocate extent map",
+};
+
 static const struct super_operations btrfs_test_super_ops = {
 	.alloc_inode	= btrfs_alloc_inode,
 	.destroy_inode	= btrfs_test_destroy_inode,
@@ -99,7 +109,6 @@ struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
 
 	spin_lock_init(&fs_info->buffer_lock);
 	spin_lock_init(&fs_info->qgroup_lock);
-	spin_lock_init(&fs_info->qgroup_op_lock);
 	spin_lock_init(&fs_info->super_lock);
 	spin_lock_init(&fs_info->fs_roots_radix_lock);
 	spin_lock_init(&fs_info->tree_mod_seq_lock);
@@ -115,8 +124,10 @@ struct btrfs_fs_info *btrfs_alloc_dummy_fs_info(u32 nodesize, u32 sectorsize)
 	INIT_LIST_HEAD(&fs_info->tree_mod_seq_list);
 	INIT_RADIX_TREE(&fs_info->buffer_radix, GFP_ATOMIC);
 	INIT_RADIX_TREE(&fs_info->fs_roots_radix, GFP_ATOMIC);
-	extent_io_tree_init(&fs_info->freed_extents[0], NULL);
-	extent_io_tree_init(&fs_info->freed_extents[1], NULL);
+	extent_io_tree_init(fs_info, &fs_info->freed_extents[0],
+			    IO_TREE_FS_INFO_FREED_EXTENTS0, NULL);
+	extent_io_tree_init(fs_info, &fs_info->freed_extents[1],
+			    IO_TREE_FS_INFO_FREED_EXTENTS1, NULL);
 	fs_info->pinned_extents = &fs_info->freed_extents[0];
 	set_bit(BTRFS_FS_STATE_DUMMY_FS_INFO, &fs_info->fs_state);
 
diff --git a/fs/btrfs/tests/btrfs-tests.h b/fs/btrfs/tests/btrfs-tests.h
index 70ff9f9d86a1..ee277bbd939b 100644
--- a/fs/btrfs/tests/btrfs-tests.h
+++ b/fs/btrfs/tests/btrfs-tests.h
@@ -10,7 +10,22 @@
 int btrfs_run_sanity_tests(void);
 
 #define test_msg(fmt, ...) pr_info("BTRFS: selftest: " fmt "\n", ##__VA_ARGS__)
-#define test_err(fmt, ...) pr_err("BTRFS: selftest: " fmt "\n", ##__VA_ARGS__)
+#define test_err(fmt, ...) pr_err("BTRFS: selftest: %s:%d " fmt "\n",	\
+		__FILE__, __LINE__, ##__VA_ARGS__)
+
+#define test_std_err(index)	test_err("%s", test_error[index])
+
+enum {
+	TEST_ALLOC_FS_INFO,
+	TEST_ALLOC_ROOT,
+	TEST_ALLOC_EXTENT_BUFFER,
+	TEST_ALLOC_PATH,
+	TEST_ALLOC_INODE,
+	TEST_ALLOC_BLOCK_GROUP,
+	TEST_ALLOC_EXTENT_MAP,
+};
+
+extern const char *test_error[];
 
 struct btrfs_root;
 struct btrfs_trans_handle;
diff --git a/fs/btrfs/tests/extent-buffer-tests.c b/fs/btrfs/tests/extent-buffer-tests.c
index 7d72eab6d32c..a1b9f9b5978e 100644
--- a/fs/btrfs/tests/extent-buffer-tests.c
+++ b/fs/btrfs/tests/extent-buffer-tests.c
@@ -30,27 +30,27 @@ static int test_btrfs_split_item(u32 sectorsize, u32 nodesize)
 
 	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 	if (!fs_info) {
-		test_err("could not allocate fs_info");
+		test_std_err(TEST_ALLOC_FS_INFO);
 		return -ENOMEM;
 	}
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("could not allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(root);
 		goto out;
 	}
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("could not allocate path");
+		test_std_err(TEST_ALLOC_PATH);
 		ret = -ENOMEM;
 		goto out;
 	}
 
 	path->nodes[0] = eb = alloc_dummy_extent_buffer(fs_info, nodesize);
 	if (!eb) {
-		test_err("could not allocate dummy buffer");
+		test_std_err(TEST_ALLOC_EXTENT_BUFFER);
 		ret = -ENOMEM;
 		goto out;
 	}
diff --git a/fs/btrfs/tests/extent-io-tests.c b/fs/btrfs/tests/extent-io-tests.c
index 3c46d7f23456..7bf4d5734dbe 100644
--- a/fs/btrfs/tests/extent-io-tests.c
+++ b/fs/btrfs/tests/extent-io-tests.c
@@ -73,11 +73,15 @@ static int test_find_delalloc(u32 sectorsize)
 
 	inode = btrfs_new_test_inode();
 	if (!inode) {
-		test_err("failed to allocate test inode");
+		test_std_err(TEST_ALLOC_INODE);
 		return -ENOMEM;
 	}
 
-	extent_io_tree_init(&tmp, NULL);
+	/*
+	 * Passing NULL as we don't have fs_info but tracepoints are not used
+	 * at this point
+	 */
+	extent_io_tree_init(NULL, &tmp, IO_TREE_SELFTEST, NULL);
 
 	/*
 	 * First go through and create and mark all of our pages dirty, we pin
@@ -374,8 +378,8 @@ static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
 {
 	struct btrfs_fs_info *fs_info;
 	unsigned long len;
-	unsigned long *bitmap;
-	struct extent_buffer *eb;
+	unsigned long *bitmap = NULL;
+	struct extent_buffer *eb = NULL;
 	int ret;
 
 	test_msg("running extent buffer bitmap tests");
@@ -388,18 +392,23 @@ static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
 		? sectorsize * 4 : sectorsize;
 
 	fs_info = btrfs_alloc_dummy_fs_info(len, len);
+	if (!fs_info) {
+		test_std_err(TEST_ALLOC_FS_INFO);
+		return -ENOMEM;
+	}
 
 	bitmap = kmalloc(len, GFP_KERNEL);
 	if (!bitmap) {
 		test_err("couldn't allocate test bitmap");
-		return -ENOMEM;
+		ret = -ENOMEM;
+		goto out;
 	}
 
 	eb = __alloc_dummy_extent_buffer(fs_info, 0, len);
 	if (!eb) {
-		test_err("couldn't allocate test extent buffer");
-		kfree(bitmap);
-		return -ENOMEM;
+		test_std_err(TEST_ALLOC_ROOT);
+		ret = -ENOMEM;
+		goto out;
 	}
 
 	ret = __test_eb_bitmaps(bitmap, eb, len);
@@ -408,17 +417,18 @@ static int test_eb_bitmaps(u32 sectorsize, u32 nodesize)
 
 	/* Do it over again with an extent buffer which isn't page-aligned. */
 	free_extent_buffer(eb);
-	eb = __alloc_dummy_extent_buffer(NULL, nodesize / 2, len);
+	eb = __alloc_dummy_extent_buffer(fs_info, nodesize / 2, len);
 	if (!eb) {
-		test_err("couldn't allocate test extent buffer");
-		kfree(bitmap);
-		return -ENOMEM;
+		test_std_err(TEST_ALLOC_ROOT);
+		ret = -ENOMEM;
+		goto out;
 	}
 
 	ret = __test_eb_bitmaps(bitmap, eb, len);
 out:
 	free_extent_buffer(eb);
 	kfree(bitmap);
+	btrfs_free_dummy_fs_info(fs_info);
 	return ret;
 }
 
@@ -434,6 +444,5 @@ int btrfs_test_extent_io(u32 sectorsize, u32 nodesize)
 
 	ret = test_eb_bitmaps(sectorsize, nodesize);
 out:
-	test_msg("extent I/O tests finished");
 	return ret;
 }
diff --git a/fs/btrfs/tests/extent-map-tests.c b/fs/btrfs/tests/extent-map-tests.c
index bf15d3a7f20e..87aeabe9d610 100644
--- a/fs/btrfs/tests/extent-map-tests.c
+++ b/fs/btrfs/tests/extent-map-tests.c
@@ -47,7 +47,7 @@ static void free_extent_map_tree(struct extent_map_tree *em_tree)
  *                                    ->add_extent_mapping(0, 16K)
  *                                    -> #handle -EEXIST
  */
-static void test_case_1(struct btrfs_fs_info *fs_info,
+static int test_case_1(struct btrfs_fs_info *fs_info,
 		struct extent_map_tree *em_tree)
 {
 	struct extent_map *em;
@@ -56,9 +56,10 @@ static void test_case_1(struct btrfs_fs_info *fs_info,
 	int ret;
 
 	em = alloc_extent_map();
-	if (!em)
-		/* Skip the test on error. */
-		return;
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		return -ENOMEM;
+	}
 
 	/* Add [0, 16K) */
 	em->start = 0;
@@ -66,25 +67,37 @@ static void test_case_1(struct btrfs_fs_info *fs_info,
 	em->block_start = 0;
 	em->block_len = SZ_16K;
 	ret = add_extent_mapping(em_tree, em, 0);
-	ASSERT(ret == 0);
+	if (ret < 0) {
+		test_err("cannot add extent range [0, 16K)");
+		goto out;
+	}
 	free_extent_map(em);
 
 	/* Add [16K, 20K) following [0, 16K)  */
 	em = alloc_extent_map();
-	if (!em)
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		ret = -ENOMEM;
 		goto out;
+	}
 
 	em->start = SZ_16K;
 	em->len = SZ_4K;
 	em->block_start = SZ_32K; /* avoid merging */
 	em->block_len = SZ_4K;
 	ret = add_extent_mapping(em_tree, em, 0);
-	ASSERT(ret == 0);
+	if (ret < 0) {
+		test_err("cannot add extent range [16K, 20K)");
+		goto out;
+	}
 	free_extent_map(em);
 
 	em = alloc_extent_map();
-	if (!em)
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		ret = -ENOMEM;
 		goto out;
+	}
 
 	/* Add [0, 8K), should return [0, 16K) instead. */
 	em->start = start;
@@ -92,19 +105,24 @@ static void test_case_1(struct btrfs_fs_info *fs_info,
 	em->block_start = start;
 	em->block_len = len;
 	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
-	if (ret)
+	if (ret) {
 		test_err("case1 [%llu %llu]: ret %d", start, start + len, ret);
+		goto out;
+	}
 	if (em &&
 	    (em->start != 0 || extent_map_end(em) != SZ_16K ||
-	     em->block_start != 0 || em->block_len != SZ_16K))
+	     em->block_start != 0 || em->block_len != SZ_16K)) {
 		test_err(
 "case1 [%llu %llu]: ret %d return a wrong em (start %llu len %llu block_start %llu block_len %llu",
 			 start, start + len, ret, em->start, em->len,
 			 em->block_start, em->block_len);
+		ret = -EINVAL;
+	}
 	free_extent_map(em);
 out:
-	/* free memory */
 	free_extent_map_tree(em_tree);
+
+	return ret;
 }
 
 /*
@@ -113,16 +131,17 @@ out:
  * Reading the inline ending up with EEXIST, ie. read an inline
  * extent and discard page cache and read it again.
  */
-static void test_case_2(struct btrfs_fs_info *fs_info,
+static int test_case_2(struct btrfs_fs_info *fs_info,
 		struct extent_map_tree *em_tree)
 {
 	struct extent_map *em;
 	int ret;
 
 	em = alloc_extent_map();
-	if (!em)
-		/* Skip the test on error. */
-		return;
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		return -ENOMEM;
+	}
 
 	/* Add [0, 1K) */
 	em->start = 0;
@@ -130,25 +149,37 @@ static void test_case_2(struct btrfs_fs_info *fs_info,
 	em->block_start = EXTENT_MAP_INLINE;
 	em->block_len = (u64)-1;
 	ret = add_extent_mapping(em_tree, em, 0);
-	ASSERT(ret == 0);
+	if (ret < 0) {
+		test_err("cannot add extent range [0, 1K)");
+		goto out;
+	}
 	free_extent_map(em);
 
-	/* Add [4K, 4K) following [0, 1K)  */
+	/* Add [4K, 8K) following [0, 1K)  */
 	em = alloc_extent_map();
-	if (!em)
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		ret = -ENOMEM;
 		goto out;
+	}
 
 	em->start = SZ_4K;
 	em->len = SZ_4K;
 	em->block_start = SZ_4K;
 	em->block_len = SZ_4K;
 	ret = add_extent_mapping(em_tree, em, 0);
-	ASSERT(ret == 0);
+	if (ret < 0) {
+		test_err("cannot add extent range [4K, 8K)");
+		goto out;
+	}
 	free_extent_map(em);
 
 	em = alloc_extent_map();
-	if (!em)
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		ret = -ENOMEM;
 		goto out;
+	}
 
 	/* Add [0, 1K) */
 	em->start = 0;
@@ -156,22 +187,27 @@ static void test_case_2(struct btrfs_fs_info *fs_info,
 	em->block_start = EXTENT_MAP_INLINE;
 	em->block_len = (u64)-1;
 	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, em->start, em->len);
-	if (ret)
+	if (ret) {
 		test_err("case2 [0 1K]: ret %d", ret);
+		goto out;
+	}
 	if (em &&
 	    (em->start != 0 || extent_map_end(em) != SZ_1K ||
-	     em->block_start != EXTENT_MAP_INLINE || em->block_len != (u64)-1))
+	     em->block_start != EXTENT_MAP_INLINE || em->block_len != (u64)-1)) {
 		test_err(
 "case2 [0 1K]: ret %d return a wrong em (start %llu len %llu block_start %llu block_len %llu",
 			 ret, em->start, em->len, em->block_start,
 			 em->block_len);
+		ret = -EINVAL;
+	}
 	free_extent_map(em);
 out:
-	/* free memory */
 	free_extent_map_tree(em_tree);
+
+	return ret;
 }
 
-static void __test_case_3(struct btrfs_fs_info *fs_info,
+static int __test_case_3(struct btrfs_fs_info *fs_info,
 		struct extent_map_tree *em_tree, u64 start)
 {
 	struct extent_map *em;
@@ -179,9 +215,10 @@ static void __test_case_3(struct btrfs_fs_info *fs_info,
 	int ret;
 
 	em = alloc_extent_map();
-	if (!em)
-		/* Skip this test on error. */
-		return;
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		return -ENOMEM;
+	}
 
 	/* Add [4K, 8K) */
 	em->start = SZ_4K;
@@ -189,12 +226,18 @@ static void __test_case_3(struct btrfs_fs_info *fs_info,
 	em->block_start = SZ_4K;
 	em->block_len = SZ_4K;
 	ret = add_extent_mapping(em_tree, em, 0);
-	ASSERT(ret == 0);
+	if (ret < 0) {
+		test_err("cannot add extent range [4K, 8K)");
+		goto out;
+	}
 	free_extent_map(em);
 
 	em = alloc_extent_map();
-	if (!em)
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		ret = -ENOMEM;
 		goto out;
+	}
 
 	/* Add [0, 16K) */
 	em->start = 0;
@@ -202,24 +245,29 @@ static void __test_case_3(struct btrfs_fs_info *fs_info,
 	em->block_start = 0;
 	em->block_len = SZ_16K;
 	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);
-	if (ret)
+	if (ret) {
 		test_err("case3 [0x%llx 0x%llx): ret %d",
 			 start, start + len, ret);
+		goto out;
+	}
 	/*
 	 * Since bytes within em are contiguous, em->block_start is identical to
 	 * em->start.
 	 */
 	if (em &&
 	    (start < em->start || start + len > extent_map_end(em) ||
-	     em->start != em->block_start || em->len != em->block_len))
+	     em->start != em->block_start || em->len != em->block_len)) {
 		test_err(
 "case3 [0x%llx 0x%llx): ret %d em (start 0x%llx len 0x%llx block_start 0x%llx block_len 0x%llx)",
 			 start, start + len, ret, em->start, em->len,
 			 em->block_start, em->block_len);
+		ret = -EINVAL;
+	}
 	free_extent_map(em);
 out:
-	/* free memory */
 	free_extent_map_tree(em_tree);
+
+	return ret;
 }
 
 /*
@@ -238,15 +286,23 @@ out:
  *   -> add_extent_mapping()
  *                            -> add_extent_mapping()
  */
-static void test_case_3(struct btrfs_fs_info *fs_info,
+static int test_case_3(struct btrfs_fs_info *fs_info,
 		struct extent_map_tree *em_tree)
 {
-	__test_case_3(fs_info, em_tree, 0);
-	__test_case_3(fs_info, em_tree, SZ_8K);
-	__test_case_3(fs_info, em_tree, (12 * 1024ULL));
+	int ret;
+
+	ret = __test_case_3(fs_info, em_tree, 0);
+	if (ret)
+		return ret;
+	ret = __test_case_3(fs_info, em_tree, SZ_8K);
+	if (ret)
+		return ret;
+	ret = __test_case_3(fs_info, em_tree, (12 * SZ_1K));
+
+	return ret;
 }
 
-static void __test_case_4(struct btrfs_fs_info *fs_info,
+static int __test_case_4(struct btrfs_fs_info *fs_info,
 		struct extent_map_tree *em_tree, u64 start)
 {
 	struct extent_map *em;
@@ -254,9 +310,10 @@ static void __test_case_4(struct btrfs_fs_info *fs_info,
 	int ret;
 
 	em = alloc_extent_map();
-	if (!em)
-		/* Skip this test on error. */
-		return;
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		return -ENOMEM;
+	}
 
 	/* Add [0K, 8K) */
 	em->start = 0;
@@ -264,44 +321,60 @@ static void __test_case_4(struct btrfs_fs_info *fs_info,
 	em->block_start = 0;
 	em->block_len = SZ_8K;
 	ret = add_extent_mapping(em_tree, em, 0);
-	ASSERT(ret == 0);
+	if (ret < 0) {
+		test_err("cannot add extent range [0, 8K)");
+		goto out;
+	}
 	free_extent_map(em);
 
 	em = alloc_extent_map();
-	if (!em)
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		ret = -ENOMEM;
 		goto out;
+	}
 
-	/* Add [8K, 24K) */
+	/* Add [8K, 32K) */
 	em->start = SZ_8K;
-	em->len = 24 * 1024ULL;
+	em->len = 24 * SZ_1K;
 	em->block_start = SZ_16K; /* avoid merging */
-	em->block_len = 24 * 1024ULL;
+	em->block_len = 24 * SZ_1K;
 	ret = add_extent_mapping(em_tree, em, 0);
-	ASSERT(ret == 0);
+	if (ret < 0) {
+		test_err("cannot add extent range [8K, 32K)");
+		goto out;
+	}
 	free_extent_map(em);
 
 	em = alloc_extent_map();
-	if (!em)
+	if (!em) {
+		test_std_err(TEST_ALLOC_EXTENT_MAP);
+		ret = -ENOMEM;
 		goto out;
+	}
 	/* Add [0K, 32K) */
 	em->start = 0;
 	em->len = SZ_32K;
 	em->block_start = 0;
 	em->block_len = SZ_32K;
 	ret = btrfs_add_extent_mapping(fs_info, em_tree, &em, start, len);
-	if (ret)
+	if (ret) {
 		test_err("case4 [0x%llx 0x%llx): ret %d",
 			 start, len, ret);
-	if (em &&
-	    (start < em->start || start + len > extent_map_end(em)))
+		goto out;
+	}
+	if (em && (start < em->start || start + len > extent_map_end(em))) {
 		test_err(
 "case4 [0x%llx 0x%llx): ret %d, added wrong em (start 0x%llx len 0x%llx block_start 0x%llx block_len 0x%llx)",
 			 start, len, ret, em->start, em->len, em->block_start,
 			 em->block_len);
+		ret = -EINVAL;
+	}
 	free_extent_map(em);
 out:
-	/* free memory */
 	free_extent_map_tree(em_tree);
+
+	return ret;
 }
 
 /*
@@ -329,17 +402,24 @@ out:
  *                                             # handle -EEXIST when adding
  *                                             # [0, 32K)
  */
-static void test_case_4(struct btrfs_fs_info *fs_info,
+static int test_case_4(struct btrfs_fs_info *fs_info,
 		struct extent_map_tree *em_tree)
 {
-	__test_case_4(fs_info, em_tree, 0);
-	__test_case_4(fs_info, em_tree, SZ_4K);
+	int ret;
+
+	ret = __test_case_4(fs_info, em_tree, 0);
+	if (ret)
+		return ret;
+	ret = __test_case_4(fs_info, em_tree, SZ_4K);
+
+	return ret;
 }
 
 int btrfs_test_extent_map(void)
 {
 	struct btrfs_fs_info *fs_info = NULL;
 	struct extent_map_tree *em_tree;
+	int ret = 0;
 
 	test_msg("running extent_map tests");
 
@@ -349,25 +429,32 @@ int btrfs_test_extent_map(void)
 	 */
 	fs_info = btrfs_alloc_dummy_fs_info(PAGE_SIZE, PAGE_SIZE);
 	if (!fs_info) {
-		test_msg("Couldn't allocate dummy fs info");
+		test_std_err(TEST_ALLOC_FS_INFO);
 		return -ENOMEM;
 	}
 
 	em_tree = kzalloc(sizeof(*em_tree), GFP_KERNEL);
-	if (!em_tree)
-		/* Skip the test on error. */
+	if (!em_tree) {
+		ret = -ENOMEM;
 		goto out;
+	}
 
 	extent_map_tree_init(em_tree);
 
-	test_case_1(fs_info, em_tree);
-	test_case_2(fs_info, em_tree);
-	test_case_3(fs_info, em_tree);
-	test_case_4(fs_info, em_tree);
+	ret = test_case_1(fs_info, em_tree);
+	if (ret)
+		goto out;
+	ret = test_case_2(fs_info, em_tree);
+	if (ret)
+		goto out;
+	ret = test_case_3(fs_info, em_tree);
+	if (ret)
+		goto out;
+	ret = test_case_4(fs_info, em_tree);
 
-	kfree(em_tree);
 out:
+	kfree(em_tree);
 	btrfs_free_dummy_fs_info(fs_info);
 
-	return 0;
+	return ret;
 }
diff --git a/fs/btrfs/tests/free-space-tests.c b/fs/btrfs/tests/free-space-tests.c
index 5c2f77e9439b..af89f66f9e63 100644
--- a/fs/btrfs/tests/free-space-tests.c
+++ b/fs/btrfs/tests/free-space-tests.c
@@ -404,7 +404,7 @@ test_steal_space_from_bitmap_to_extent(struct btrfs_block_group_cache *cache,
 	};
 	const struct btrfs_free_space_op *orig_free_space_ops;
 
-	test_msg("running space stealing from bitmap to extent");
+	test_msg("running space stealing from bitmap to extent tests");
 
 	/*
 	 * For this test, we want to ensure we end up with an extent entry
@@ -834,9 +834,10 @@ int btrfs_test_free_space_cache(u32 sectorsize, u32 nodesize)
 
 	test_msg("running btrfs free space cache tests");
 	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
-	if (!fs_info)
+	if (!fs_info) {
+		test_std_err(TEST_ALLOC_FS_INFO);
 		return -ENOMEM;
-
+	}
 
 	/*
 	 * For ppc64 (with 64k page size), bytes per bitmap might be
@@ -846,13 +847,14 @@ int btrfs_test_free_space_cache(u32 sectorsize, u32 nodesize)
 	cache = btrfs_alloc_dummy_block_group(fs_info,
 				      BITS_PER_BITMAP * sectorsize + PAGE_SIZE);
 	if (!cache) {
-		test_err("couldn't run the tests");
+		test_std_err(TEST_ALLOC_BLOCK_GROUP);
 		btrfs_free_dummy_fs_info(fs_info);
 		return 0;
 	}
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(root);
 		goto out;
 	}
@@ -874,6 +876,5 @@ out:
 	btrfs_free_dummy_block_group(cache);
 	btrfs_free_dummy_root(root);
 	btrfs_free_dummy_fs_info(fs_info);
-	test_msg("free space cache tests finished");
 	return ret;
 }
diff --git a/fs/btrfs/tests/free-space-tree-tests.c b/fs/btrfs/tests/free-space-tree-tests.c
index 89346da890cf..a90dad166971 100644
--- a/fs/btrfs/tests/free-space-tree-tests.c
+++ b/fs/btrfs/tests/free-space-tree-tests.c
@@ -30,7 +30,7 @@ static int __check_free_space_extents(struct btrfs_trans_handle *trans,
 	unsigned int i;
 	int ret;
 
-	info = search_free_space_info(trans, fs_info, cache, path, 0);
+	info = search_free_space_info(trans, cache, path, 0);
 	if (IS_ERR(info)) {
 		test_err("could not find free space info");
 		ret = PTR_ERR(info);
@@ -115,7 +115,7 @@ static int check_free_space_extents(struct btrfs_trans_handle *trans,
 	u32 flags;
 	int ret;
 
-	info = search_free_space_info(trans, fs_info, cache, path, 0);
+	info = search_free_space_info(trans, cache, path, 0);
 	if (IS_ERR(info)) {
 		test_err("could not find free space info");
 		btrfs_release_path(path);
@@ -444,14 +444,14 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
 
 	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 	if (!fs_info) {
-		test_err("couldn't allocate dummy fs info");
+		test_std_err(TEST_ALLOC_FS_INFO);
 		ret = -ENOMEM;
 		goto out;
 	}
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate dummy root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(root);
 		goto out;
 	}
@@ -463,7 +463,7 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
 
 	root->node = alloc_test_extent_buffer(root->fs_info, nodesize);
 	if (!root->node) {
-		test_err("couldn't allocate dummy buffer");
+		test_std_err(TEST_ALLOC_EXTENT_BUFFER);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -473,7 +473,7 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
 
 	cache = btrfs_alloc_dummy_block_group(fs_info, 8 * alignment);
 	if (!cache) {
-		test_err("couldn't allocate dummy block group cache");
+		test_std_err(TEST_ALLOC_BLOCK_GROUP);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -486,7 +486,7 @@ static int run_test(test_func_t test_func, int bitmaps, u32 sectorsize,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = -ENOMEM;
 		goto out;
 	}
@@ -539,7 +539,7 @@ static int run_test_both_formats(test_func_t test_func, u32 sectorsize,
 	ret = run_test(test_func, 0, sectorsize, nodesize, alignment);
 	if (ret) {
 		test_err(
-	"%pf failed with extents, sectorsize=%u, nodesize=%u, alignment=%u",
+	"%ps failed with extents, sectorsize=%u, nodesize=%u, alignment=%u",
 			 test_func, sectorsize, nodesize, alignment);
 		test_ret = ret;
 	}
@@ -547,7 +547,7 @@ static int run_test_both_formats(test_func_t test_func, u32 sectorsize,
 	ret = run_test(test_func, 1, sectorsize, nodesize, alignment);
 	if (ret) {
 		test_err(
-	"%pf failed with bitmaps, sectorsize=%u, nodesize=%u, alignment=%u",
+	"%ps failed with bitmaps, sectorsize=%u, nodesize=%u, alignment=%u",
 			 test_func, sectorsize, nodesize, alignment);
 		test_ret = ret;
 	}
diff --git a/fs/btrfs/tests/inode-tests.c b/fs/btrfs/tests/inode-tests.c
index af0c8e30d9e2..bc6dbd1b42fd 100644
--- a/fs/btrfs/tests/inode-tests.c
+++ b/fs/btrfs/tests/inode-tests.c
@@ -226,31 +226,34 @@ static noinline int test_btrfs_get_extent(u32 sectorsize, u32 nodesize)
 	u64 offset;
 	int ret = -ENOMEM;
 
+	test_msg("running btrfs_get_extent tests");
+
 	inode = btrfs_new_test_inode();
 	if (!inode) {
-		test_err("couldn't allocate inode");
+		test_std_err(TEST_ALLOC_INODE);
 		return ret;
 	}
 
+	inode->i_mode = S_IFREG;
 	BTRFS_I(inode)->location.type = BTRFS_INODE_ITEM_KEY;
 	BTRFS_I(inode)->location.objectid = BTRFS_FIRST_FREE_OBJECTID;
 	BTRFS_I(inode)->location.offset = 0;
 
 	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 	if (!fs_info) {
-		test_err("couldn't allocate dummy fs info");
+		test_std_err(TEST_ALLOC_FS_INFO);
 		goto out;
 	}
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		goto out;
 	}
 
 	root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
 	if (!root->node) {
-		test_err("couldn't allocate dummy buffer");
+		test_std_err(TEST_ALLOC_ROOT);
 		goto out;
 	}
 
@@ -827,9 +830,11 @@ static int test_hole_first(u32 sectorsize, u32 nodesize)
 	struct extent_map *em = NULL;
 	int ret = -ENOMEM;
 
+	test_msg("running hole first btrfs_get_extent test");
+
 	inode = btrfs_new_test_inode();
 	if (!inode) {
-		test_err("couldn't allocate inode");
+		test_std_err(TEST_ALLOC_INODE);
 		return ret;
 	}
 
@@ -839,19 +844,19 @@ static int test_hole_first(u32 sectorsize, u32 nodesize)
 
 	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 	if (!fs_info) {
-		test_err("couldn't allocate dummy fs info");
+		test_std_err(TEST_ALLOC_FS_INFO);
 		goto out;
 	}
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		goto out;
 	}
 
 	root->node = alloc_dummy_extent_buffer(fs_info, nodesize);
 	if (!root->node) {
-		test_err("couldn't allocate dummy buffer");
+		test_std_err(TEST_ALLOC_ROOT);
 		goto out;
 	}
 
@@ -927,21 +932,23 @@ static int test_extent_accounting(u32 sectorsize, u32 nodesize)
 	struct btrfs_root *root = NULL;
 	int ret = -ENOMEM;
 
+	test_msg("running outstanding_extents tests");
+
 	inode = btrfs_new_test_inode();
 	if (!inode) {
-		test_err("couldn't allocate inode");
+		test_std_err(TEST_ALLOC_INODE);
 		return ret;
 	}
 
 	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 	if (!fs_info) {
-		test_err("couldn't allocate dummy fs info");
+		test_std_err(TEST_ALLOC_FS_INFO);
 		goto out;
 	}
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		goto out;
 	}
 
@@ -1110,17 +1117,16 @@ int btrfs_test_inodes(u32 sectorsize, u32 nodesize)
 {
 	int ret;
 
+	test_msg("running inode tests");
+
 	set_bit(EXTENT_FLAG_COMPRESSED, &compressed_only);
 	set_bit(EXTENT_FLAG_PREALLOC, &prealloc_only);
 
-	test_msg("running btrfs_get_extent tests");
 	ret = test_btrfs_get_extent(sectorsize, nodesize);
 	if (ret)
 		return ret;
-	test_msg("running hole first btrfs_get_extent test");
 	ret = test_hole_first(sectorsize, nodesize);
 	if (ret)
 		return ret;
-	test_msg("running outstanding_extents tests");
 	return test_extent_accounting(sectorsize, nodesize);
 }
diff --git a/fs/btrfs/tests/qgroup-tests.c b/fs/btrfs/tests/qgroup-tests.c
index 412b910b04cc..09aaca1efd62 100644
--- a/fs/btrfs/tests/qgroup-tests.c
+++ b/fs/btrfs/tests/qgroup-tests.c
@@ -32,7 +32,7 @@ static int insert_normal_tree_ref(struct btrfs_root *root, u64 bytenr,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		return -ENOMEM;
 	}
 
@@ -82,7 +82,7 @@ static int add_tree_ref(struct btrfs_root *root, u64 bytenr, u64 num_bytes,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		return -ENOMEM;
 	}
 
@@ -132,7 +132,7 @@ static int remove_extent_item(struct btrfs_root *root, u64 bytenr,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		return -ENOMEM;
 	}
 	path->leave_spinning = 1;
@@ -166,7 +166,7 @@ static int remove_extent_ref(struct btrfs_root *root, u64 bytenr,
 
 	path = btrfs_alloc_path();
 	if (!path) {
-		test_err("couldn't allocate path");
+		test_std_err(TEST_ALLOC_ROOT);
 		return -ENOMEM;
 	}
 
@@ -215,7 +215,7 @@ static int test_no_shared_qgroup(struct btrfs_root *root,
 
 	btrfs_init_dummy_trans(&trans, fs_info);
 
-	test_msg("qgroup basic add");
+	test_msg("running qgroup add/remove tests");
 	ret = btrfs_create_qgroup(&trans, BTRFS_FS_TREE_OBJECTID);
 	if (ret) {
 		test_err("couldn't create a qgroup %d", ret);
@@ -316,7 +316,7 @@ static int test_multiple_refs(struct btrfs_root *root,
 
 	btrfs_init_dummy_trans(&trans, fs_info);
 
-	test_msg("qgroup multiple refs test");
+	test_msg("running qgroup multiple refs test");
 
 	/*
 	 * We have BTRFS_FS_TREE_OBJECTID created already from the
@@ -457,13 +457,13 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 
 	fs_info = btrfs_alloc_dummy_fs_info(nodesize, sectorsize);
 	if (!fs_info) {
-		test_err("couldn't allocate dummy fs info");
+		test_std_err(TEST_ALLOC_FS_INFO);
 		return -ENOMEM;
 	}
 
 	root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(root)) {
-		test_err("couldn't allocate root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(root);
 		goto out;
 	}
@@ -495,7 +495,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 
 	tmp_root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(tmp_root)) {
-		test_err("couldn't allocate a fs root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(tmp_root);
 		goto out;
 	}
@@ -510,7 +510,7 @@ int btrfs_test_qgroups(u32 sectorsize, u32 nodesize)
 
 	tmp_root = btrfs_alloc_dummy_root(fs_info);
 	if (IS_ERR(tmp_root)) {
-		test_err("couldn't allocate a fs root");
+		test_std_err(TEST_ALLOC_ROOT);
 		ret = PTR_ERR(tmp_root);
 		goto out;
 	}
diff --git a/fs/btrfs/transaction.c b/fs/btrfs/transaction.c
index 4ec2b660d014..3f6811cdf803 100644
--- a/fs/btrfs/transaction.c
+++ b/fs/btrfs/transaction.c
@@ -50,14 +50,6 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
 			btrfs_err(transaction->fs_info,
 				  "pending csums is %llu",
 				  transaction->delayed_refs.pending_csums);
-		while (!list_empty(&transaction->pending_chunks)) {
-			struct extent_map *em;
-
-			em = list_first_entry(&transaction->pending_chunks,
-					      struct extent_map, list);
-			list_del_init(&em->list);
-			free_extent_map(em);
-		}
 		/*
 		 * If any block groups are found in ->deleted_bgs then it's
 		 * because the transaction was aborted and a commit did not
@@ -75,39 +67,11 @@ void btrfs_put_transaction(struct btrfs_transaction *transaction)
 			btrfs_put_block_group_trimming(cache);
 			btrfs_put_block_group(cache);
 		}
+		WARN_ON(!list_empty(&transaction->dev_update_list));
 		kfree(transaction);
 	}
 }
 
-static void clear_btree_io_tree(struct extent_io_tree *tree)
-{
-	spin_lock(&tree->lock);
-	/*
-	 * Do a single barrier for the waitqueue_active check here, the state
-	 * of the waitqueue should not change once clear_btree_io_tree is
-	 * called.
-	 */
-	smp_mb();
-	while (!RB_EMPTY_ROOT(&tree->state)) {
-		struct rb_node *node;
-		struct extent_state *state;
-
-		node = rb_first(&tree->state);
-		state = rb_entry(node, struct extent_state, rb_node);
-		rb_erase(&state->rb_node, &tree->state);
-		RB_CLEAR_NODE(&state->rb_node);
-		/*
-		 * btree io trees aren't supposed to have tasks waiting for
-		 * changes in the flags of extent states ever.
-		 */
-		ASSERT(!waitqueue_active(&state->wq));
-		free_extent_state(state);
-
-		cond_resched_lock(&tree->lock);
-	}
-	spin_unlock(&tree->lock);
-}
-
 static noinline void switch_commit_roots(struct btrfs_transaction *trans)
 {
 	struct btrfs_fs_info *fs_info = trans->fs_info;
@@ -121,7 +85,8 @@ static noinline void switch_commit_roots(struct btrfs_transaction *trans)
 		root->commit_root = btrfs_root_node(root);
 		if (is_fstree(root->root_key.objectid))
 			btrfs_unpin_free_ino(root);
-		clear_btree_io_tree(&root->dirty_log_pages);
+		extent_io_tree_release(&root->dirty_log_pages);
+		btrfs_qgroup_clean_swapped_blocks(root);
 	}
 
 	/* We can free old roots now. */
@@ -262,19 +227,18 @@ loop:
 	spin_lock_init(&cur_trans->delayed_refs.lock);
 
 	INIT_LIST_HEAD(&cur_trans->pending_snapshots);
-	INIT_LIST_HEAD(&cur_trans->pending_chunks);
+	INIT_LIST_HEAD(&cur_trans->dev_update_list);
 	INIT_LIST_HEAD(&cur_trans->switch_commits);
 	INIT_LIST_HEAD(&cur_trans->dirty_bgs);
 	INIT_LIST_HEAD(&cur_trans->io_bgs);
 	INIT_LIST_HEAD(&cur_trans->dropped_roots);
 	mutex_init(&cur_trans->cache_write_mutex);
-	cur_trans->num_dirty_bgs = 0;
 	spin_lock_init(&cur_trans->dirty_bgs_lock);
 	INIT_LIST_HEAD(&cur_trans->deleted_bgs);
 	spin_lock_init(&cur_trans->dropped_roots_lock);
 	list_add_tail(&cur_trans->list, &fs_info->trans_list);
-	extent_io_tree_init(&cur_trans->dirty_pages,
-			     fs_info->btree_inode);
+	extent_io_tree_init(fs_info, &cur_trans->dirty_pages,
+			IO_TREE_TRANS_DIRTY_PAGES, fs_info->btree_inode);
 	fs_info->generation++;
 	cur_trans->transid = fs_info->generation;
 	fs_info->running_transaction = cur_trans;
@@ -845,8 +809,7 @@ static int __btrfs_end_transaction(struct btrfs_trans_handle *trans,
 	btrfs_trans_release_metadata(trans);
 	trans->block_rsv = NULL;
 
-	if (!list_empty(&trans->new_bgs))
-		btrfs_create_pending_block_groups(trans);
+	btrfs_create_pending_block_groups(trans);
 
 	btrfs_trans_release_chunk_metadata(trans);
 
@@ -928,7 +891,7 @@ int btrfs_write_marked_extents(struct btrfs_fs_info *fs_info,
 		 * superblock that points to btree nodes/leafs for which
 		 * writeback hasn't finished yet (and without errors).
 		 * We cleanup any entries left in the io tree when committing
-		 * the transaction (through clear_btree_io_tree()).
+		 * the transaction (through extent_io_tree_release()).
 		 */
 		if (err == -ENOMEM) {
 			err = 0;
@@ -973,7 +936,7 @@ static int __btrfs_wait_marked_extents(struct btrfs_fs_info *fs_info,
 		 * left in the io tree. For a log commit, we don't remove them
 		 * after committing the log because the tree can be accessed
 		 * concurrently - we do it only at transaction commit time when
-		 * it's safe to do it (through clear_btree_io_tree()).
+		 * it's safe to do it (through extent_io_tree_release()).
 		 */
 		err = clear_extent_bit(dirty_pages, start, end,
 				       EXTENT_NEED_WAIT, 0, 0, &cached_state);
@@ -1051,7 +1014,7 @@ static int btrfs_write_and_wait_transaction(struct btrfs_trans_handle *trans)
 	blk_finish_plug(&plug);
 	ret2 = btrfs_wait_extents(fs_info, dirty_pages);
 
-	clear_btree_io_tree(&trans->transaction->dirty_pages);
+	extent_io_tree_release(&trans->transaction->dirty_pages);
 
 	if (ret)
 		return ret;
@@ -1130,17 +1093,17 @@ static noinline int commit_cowonly_roots(struct btrfs_trans_handle *trans)
 	if (ret)
 		return ret;
 
-	ret = btrfs_run_dev_stats(trans, fs_info);
+	ret = btrfs_run_dev_stats(trans);
 	if (ret)
 		return ret;
-	ret = btrfs_run_dev_replace(trans, fs_info);
+	ret = btrfs_run_dev_replace(trans);
 	if (ret)
 		return ret;
 	ret = btrfs_run_qgroups(trans);
 	if (ret)
 		return ret;
 
-	ret = btrfs_setup_space_cache(trans, fs_info);
+	ret = btrfs_setup_space_cache(trans);
 	if (ret)
 		return ret;
 
@@ -1168,7 +1131,7 @@ again:
 	}
 
 	while (!list_empty(dirty_bgs) || !list_empty(io_bgs)) {
-		ret = btrfs_write_dirty_block_groups(trans, fs_info);
+		ret = btrfs_write_dirty_block_groups(trans);
 		if (ret)
 			return ret;
 		ret = btrfs_run_delayed_refs(trans, (unsigned long)-1);
@@ -1532,7 +1495,7 @@ static noinline int create_pending_snapshot(struct btrfs_trans_handle *trans,
 		goto fail;
 	}
 
-	btrfs_set_lock_blocking(old);
+	btrfs_set_lock_blocking_write(old);
 
 	ret = btrfs_copy_root(trans, root, old, &tmp, objectid);
 	/* clean up in any case */
@@ -1886,8 +1849,10 @@ static void btrfs_cleanup_pending_block_groups(struct btrfs_trans_handle *trans)
        }
 }
 
-static inline int btrfs_start_delalloc_flush(struct btrfs_fs_info *fs_info)
+static inline int btrfs_start_delalloc_flush(struct btrfs_trans_handle *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
+
 	/*
 	 * We use writeback_inodes_sb here because if we used
 	 * btrfs_start_delalloc_roots we would deadlock with fs freeze.
@@ -1897,15 +1862,50 @@ static inline int btrfs_start_delalloc_flush(struct btrfs_fs_info *fs_info)
 	 * from already being in a transaction and our join_transaction doesn't
 	 * have to re-take the fs freeze lock.
 	 */
-	if (btrfs_test_opt(fs_info, FLUSHONCOMMIT))
+	if (btrfs_test_opt(fs_info, FLUSHONCOMMIT)) {
 		writeback_inodes_sb(fs_info->sb, WB_REASON_SYNC);
+	} else {
+		struct btrfs_pending_snapshot *pending;
+		struct list_head *head = &trans->transaction->pending_snapshots;
+
+		/*
+		 * Flush dellaloc for any root that is going to be snapshotted.
+		 * This is done to avoid a corrupted version of files, in the
+		 * snapshots, that had both buffered and direct IO writes (even
+		 * if they were done sequentially) due to an unordered update of
+		 * the inode's size on disk.
+		 */
+		list_for_each_entry(pending, head, list) {
+			int ret;
+
+			ret = btrfs_start_delalloc_snapshot(pending->root);
+			if (ret)
+				return ret;
+		}
+	}
 	return 0;
 }
 
-static inline void btrfs_wait_delalloc_flush(struct btrfs_fs_info *fs_info)
+static inline void btrfs_wait_delalloc_flush(struct btrfs_trans_handle *trans)
 {
-	if (btrfs_test_opt(fs_info, FLUSHONCOMMIT))
+	struct btrfs_fs_info *fs_info = trans->fs_info;
+
+	if (btrfs_test_opt(fs_info, FLUSHONCOMMIT)) {
 		btrfs_wait_ordered_roots(fs_info, U64_MAX, 0, (u64)-1);
+	} else {
+		struct btrfs_pending_snapshot *pending;
+		struct list_head *head = &trans->transaction->pending_snapshots;
+
+		/*
+		 * Wait for any dellaloc that we started previously for the roots
+		 * that are going to be snapshotted. This is to avoid a corrupted
+		 * version of files in the snapshots that had both buffered and
+		 * direct IO writes (even if they were done sequentially).
+		 */
+		list_for_each_entry(pending, head, list)
+			btrfs_wait_ordered_extents(pending->root,
+						   U64_MAX, 0, U64_MAX);
+	}
 }
 
 int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
@@ -1943,8 +1943,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
 	cur_trans->delayed_refs.flushing = 1;
 	smp_wmb();
 
-	if (!list_empty(&trans->new_bgs))
-		btrfs_create_pending_block_groups(trans);
+	btrfs_create_pending_block_groups(trans);
 
 	ret = btrfs_run_delayed_refs(trans, 0);
 	if (ret) {
@@ -2024,7 +2023,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
 
 	extwriter_counter_dec(cur_trans, trans->type);
 
-	ret = btrfs_start_delalloc_flush(fs_info);
+	ret = btrfs_start_delalloc_flush(trans);
 	if (ret)
 		goto cleanup_transaction;
 
@@ -2040,7 +2039,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
 	if (ret)
 		goto cleanup_transaction;
 
-	btrfs_wait_delalloc_flush(fs_info);
+	btrfs_wait_delalloc_flush(trans);
 
 	btrfs_scrub_pause(fs_info);
 	/*
@@ -2205,8 +2204,7 @@ int btrfs_commit_transaction(struct btrfs_trans_handle *trans)
 	memcpy(fs_info->super_for_commit, fs_info->super_copy,
 	       sizeof(*fs_info->super_copy));
 
-	btrfs_update_commit_device_size(fs_info);
-	btrfs_update_commit_device_bytes_used(cur_trans);
+	btrfs_commit_device_sizes(cur_trans);
 
 	clear_bit(BTRFS_FS_LOG1_ERR, &fs_info->flags);
 	clear_bit(BTRFS_FS_LOG2_ERR, &fs_info->flags);
diff --git a/fs/btrfs/transaction.h b/fs/btrfs/transaction.h
index f1ba78949d1b..78c446c222b7 100644
--- a/fs/btrfs/transaction.h
+++ b/fs/btrfs/transaction.h
@@ -51,7 +51,7 @@ struct btrfs_transaction {
 	wait_queue_head_t writer_wait;
 	wait_queue_head_t commit_wait;
 	struct list_head pending_snapshots;
-	struct list_head pending_chunks;
+	struct list_head dev_update_list;
 	struct list_head switch_commits;
 	struct list_head dirty_bgs;
 
@@ -80,7 +80,6 @@ struct btrfs_transaction {
 	 */
 	struct mutex cache_write_mutex;
 	spinlock_t dirty_bgs_lock;
-	unsigned int num_dirty_bgs;
 	/* Protected by spin lock fs_info->unused_bgs_lock. */
 	struct list_head deleted_bgs;
 	spinlock_t dropped_roots_lock;
@@ -120,7 +119,6 @@ struct btrfs_trans_handle {
 	bool allocating_chunk;
 	bool can_flush_pending_bgs;
 	bool reloc_reserved;
-	bool sync;
 	bool dirty;
 	struct btrfs_root *root;
 	struct btrfs_fs_info *fs_info;
diff --git a/fs/btrfs/tree-checker.c b/fs/btrfs/tree-checker.c
index a62e1e837a89..96fce4bef4e7 100644
--- a/fs/btrfs/tree-checker.c
+++ b/fs/btrfs/tree-checker.c
@@ -15,6 +15,9 @@
  * carefully reviewed otherwise so it does not prevent mount of valid images.
  */
 
+#include <linux/types.h>
+#include <linux/stddef.h>
+#include <linux/error-injection.h>
 #include "ctree.h"
 #include "tree-checker.h"
 #include "disk-io.h"
@@ -41,12 +44,12 @@
  * Append generic "corrupt leaf/node root=%llu block=%llu slot=%d: " to @fmt.
  * Allows callers to customize the output.
  */
-__printf(4, 5)
+__printf(3, 4)
 __cold
-static void generic_err(const struct btrfs_fs_info *fs_info,
-			const struct extent_buffer *eb, int slot,
+static void generic_err(const struct extent_buffer *eb, int slot,
 			const char *fmt, ...)
 {
+	const struct btrfs_fs_info *fs_info = eb->fs_info;
 	struct va_format vaf;
 	va_list args;
 
@@ -66,12 +69,12 @@ static void generic_err(const struct btrfs_fs_info *fs_info,
  * Customized reporter for extent data item, since its key objectid and
  * offset has its own meaning.
  */
-__printf(4, 5)
+__printf(3, 4)
 __cold
-static void file_extent_err(const struct btrfs_fs_info *fs_info,
-			    const struct extent_buffer *eb, int slot,
+static void file_extent_err(const struct extent_buffer *eb, int slot,
 			    const char *fmt, ...)
 {
+	const struct btrfs_fs_info *fs_info = eb->fs_info;
 	struct btrfs_key key;
 	struct va_format vaf;
 	va_list args;
@@ -94,26 +97,44 @@ static void file_extent_err(const struct btrfs_fs_info *fs_info,
  * Return 0 if the btrfs_file_extent_##name is aligned to @alignment
  * Else return 1
  */
-#define CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, name, alignment)	      \
+#define CHECK_FE_ALIGNED(leaf, slot, fi, name, alignment)		      \
 ({									      \
 	if (!IS_ALIGNED(btrfs_file_extent_##name((leaf), (fi)), (alignment))) \
-		file_extent_err((fs_info), (leaf), (slot),		      \
+		file_extent_err((leaf), (slot),				      \
 	"invalid %s for file extent, have %llu, should be aligned to %u",     \
 			(#name), btrfs_file_extent_##name((leaf), (fi)),      \
 			(alignment));					      \
 	(!IS_ALIGNED(btrfs_file_extent_##name((leaf), (fi)), (alignment)));   \
 })
 
-static int check_extent_data_item(struct btrfs_fs_info *fs_info,
-				  struct extent_buffer *leaf,
-				  struct btrfs_key *key, int slot)
+static u64 file_extent_end(struct extent_buffer *leaf,
+			   struct btrfs_key *key,
+			   struct btrfs_file_extent_item *extent)
+{
+	u64 end;
+	u64 len;
+
+	if (btrfs_file_extent_type(leaf, extent) == BTRFS_FILE_EXTENT_INLINE) {
+		len = btrfs_file_extent_ram_bytes(leaf, extent);
+		end = ALIGN(key->offset + len, leaf->fs_info->sectorsize);
+	} else {
+		len = btrfs_file_extent_num_bytes(leaf, extent);
+		end = key->offset + len;
+	}
+	return end;
+}
+
+static int check_extent_data_item(struct extent_buffer *leaf,
+				  struct btrfs_key *key, int slot,
+				  struct btrfs_key *prev_key)
 {
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
 	struct btrfs_file_extent_item *fi;
 	u32 sectorsize = fs_info->sectorsize;
 	u32 item_size = btrfs_item_size_nr(leaf, slot);
 
 	if (!IS_ALIGNED(key->offset, sectorsize)) {
-		file_extent_err(fs_info, leaf, slot,
+		file_extent_err(leaf, slot,
 "unaligned file_offset for file extent, have %llu should be aligned to %u",
 			key->offset, sectorsize);
 		return -EUCLEAN;
@@ -122,7 +143,7 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
 	fi = btrfs_item_ptr(leaf, slot, struct btrfs_file_extent_item);
 
 	if (btrfs_file_extent_type(leaf, fi) > BTRFS_FILE_EXTENT_TYPES) {
-		file_extent_err(fs_info, leaf, slot,
+		file_extent_err(leaf, slot,
 		"invalid type for file extent, have %u expect range [0, %u]",
 			btrfs_file_extent_type(leaf, fi),
 			BTRFS_FILE_EXTENT_TYPES);
@@ -134,14 +155,14 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
 	 * and must be caught in open_ctree().
 	 */
 	if (btrfs_file_extent_compression(leaf, fi) > BTRFS_COMPRESS_TYPES) {
-		file_extent_err(fs_info, leaf, slot,
+		file_extent_err(leaf, slot,
 	"invalid compression for file extent, have %u expect range [0, %u]",
 			btrfs_file_extent_compression(leaf, fi),
 			BTRFS_COMPRESS_TYPES);
 		return -EUCLEAN;
 	}
 	if (btrfs_file_extent_encryption(leaf, fi)) {
-		file_extent_err(fs_info, leaf, slot,
+		file_extent_err(leaf, slot,
 			"invalid encryption for file extent, have %u expect 0",
 			btrfs_file_extent_encryption(leaf, fi));
 		return -EUCLEAN;
@@ -149,7 +170,7 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
 	if (btrfs_file_extent_type(leaf, fi) == BTRFS_FILE_EXTENT_INLINE) {
 		/* Inline extent must have 0 as key offset */
 		if (key->offset) {
-			file_extent_err(fs_info, leaf, slot,
+			file_extent_err(leaf, slot,
 		"invalid file_offset for inline file extent, have %llu expect 0",
 				key->offset);
 			return -EUCLEAN;
@@ -163,7 +184,7 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
 		/* Uncompressed inline extent size must match item size */
 		if (item_size != BTRFS_FILE_EXTENT_INLINE_DATA_START +
 		    btrfs_file_extent_ram_bytes(leaf, fi)) {
-			file_extent_err(fs_info, leaf, slot,
+			file_extent_err(leaf, slot,
 	"invalid ram_bytes for uncompressed inline extent, have %u expect %llu",
 				item_size, BTRFS_FILE_EXTENT_INLINE_DATA_START +
 				btrfs_file_extent_ram_bytes(leaf, fi));
@@ -174,41 +195,63 @@ static int check_extent_data_item(struct btrfs_fs_info *fs_info,
 
 	/* Regular or preallocated extent has fixed item size */
 	if (item_size != sizeof(*fi)) {
-		file_extent_err(fs_info, leaf, slot,
+		file_extent_err(leaf, slot,
 	"invalid item size for reg/prealloc file extent, have %u expect %zu",
 			item_size, sizeof(*fi));
 		return -EUCLEAN;
 	}
-	if (CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, ram_bytes, sectorsize) ||
-	    CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, disk_bytenr, sectorsize) ||
-	    CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, disk_num_bytes, sectorsize) ||
-	    CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, offset, sectorsize) ||
-	    CHECK_FE_ALIGNED(fs_info, leaf, slot, fi, num_bytes, sectorsize))
+	if (CHECK_FE_ALIGNED(leaf, slot, fi, ram_bytes, sectorsize) ||
+	    CHECK_FE_ALIGNED(leaf, slot, fi, disk_bytenr, sectorsize) ||
+	    CHECK_FE_ALIGNED(leaf, slot, fi, disk_num_bytes, sectorsize) ||
+	    CHECK_FE_ALIGNED(leaf, slot, fi, offset, sectorsize) ||
+	    CHECK_FE_ALIGNED(leaf, slot, fi, num_bytes, sectorsize))
 		return -EUCLEAN;
+
+	/*
+	 * Check that no two consecutive file extent items, in the same leaf,
+	 * present ranges that overlap each other.
+	 */
+	if (slot > 0 &&
+	    prev_key->objectid == key->objectid &&
+	    prev_key->type == BTRFS_EXTENT_DATA_KEY) {
+		struct btrfs_file_extent_item *prev_fi;
+		u64 prev_end;
+
+		prev_fi = btrfs_item_ptr(leaf, slot - 1,
+					 struct btrfs_file_extent_item);
+		prev_end = file_extent_end(leaf, prev_key, prev_fi);
+		if (prev_end > key->offset) {
+			file_extent_err(leaf, slot - 1,
+"file extent end range (%llu) goes beyond start offset (%llu) of the next file extent",
+					prev_end, key->offset);
+			return -EUCLEAN;
+		}
+	}
+
 	return 0;
 }
 
-static int check_csum_item(struct btrfs_fs_info *fs_info,
-			   struct extent_buffer *leaf, struct btrfs_key *key,
+static int check_csum_item(struct extent_buffer *leaf, struct btrfs_key *key,
 			   int slot)
 {
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
 	u32 sectorsize = fs_info->sectorsize;
 	u32 csumsize = btrfs_super_csum_size(fs_info->super_copy);
 
 	if (key->objectid != BTRFS_EXTENT_CSUM_OBJECTID) {
-		generic_err(fs_info, leaf, slot,
+		generic_err(leaf, slot,
 		"invalid key objectid for csum item, have %llu expect %llu",
 			key->objectid, BTRFS_EXTENT_CSUM_OBJECTID);
 		return -EUCLEAN;
 	}
 	if (!IS_ALIGNED(key->offset, sectorsize)) {
-		generic_err(fs_info, leaf, slot,
+		generic_err(leaf, slot,
 	"unaligned key offset for csum item, have %llu should be aligned to %u",
 			key->offset, sectorsize);
 		return -EUCLEAN;
 	}
 	if (!IS_ALIGNED(btrfs_item_size_nr(leaf, slot), csumsize)) {
-		generic_err(fs_info, leaf, slot,
+		generic_err(leaf, slot,
 	"unaligned item size for csum item, have %u should be aligned to %u",
 			btrfs_item_size_nr(leaf, slot), csumsize);
 		return -EUCLEAN;
@@ -220,12 +263,12 @@ static int check_csum_item(struct btrfs_fs_info *fs_info,
  * Customized reported for dir_item, only important new info is key->objectid,
  * which represents inode number
  */
-__printf(4, 5)
+__printf(3, 4)
 __cold
-static void dir_item_err(const struct btrfs_fs_info *fs_info,
-			 const struct extent_buffer *eb, int slot,
+static void dir_item_err(const struct extent_buffer *eb, int slot,
 			 const char *fmt, ...)
 {
+	const struct btrfs_fs_info *fs_info = eb->fs_info;
 	struct btrfs_key key;
 	struct va_format vaf;
 	va_list args;
@@ -244,10 +287,10 @@ static void dir_item_err(const struct btrfs_fs_info *fs_info,
 	va_end(args);
 }
 
-static int check_dir_item(struct btrfs_fs_info *fs_info,
-			  struct extent_buffer *leaf,
+static int check_dir_item(struct extent_buffer *leaf,
 			  struct btrfs_key *key, int slot)
 {
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
 	struct btrfs_dir_item *di;
 	u32 item_size = btrfs_item_size_nr(leaf, slot);
 	u32 cur = 0;
@@ -263,7 +306,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
 
 		/* header itself should not cross item boundary */
 		if (cur + sizeof(*di) > item_size) {
-			dir_item_err(fs_info, leaf, slot,
+			dir_item_err(leaf, slot,
 		"dir item header crosses item boundary, have %zu boundary %u",
 				cur + sizeof(*di), item_size);
 			return -EUCLEAN;
@@ -272,7 +315,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
 		/* dir type check */
 		dir_type = btrfs_dir_type(leaf, di);
 		if (dir_type >= BTRFS_FT_MAX) {
-			dir_item_err(fs_info, leaf, slot,
+			dir_item_err(leaf, slot,
 			"invalid dir item type, have %u expect [0, %u)",
 				dir_type, BTRFS_FT_MAX);
 			return -EUCLEAN;
@@ -280,14 +323,14 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
 
 		if (key->type == BTRFS_XATTR_ITEM_KEY &&
 		    dir_type != BTRFS_FT_XATTR) {
-			dir_item_err(fs_info, leaf, slot,
+			dir_item_err(leaf, slot,
 		"invalid dir item type for XATTR key, have %u expect %u",
 				dir_type, BTRFS_FT_XATTR);
 			return -EUCLEAN;
 		}
 		if (dir_type == BTRFS_FT_XATTR &&
 		    key->type != BTRFS_XATTR_ITEM_KEY) {
-			dir_item_err(fs_info, leaf, slot,
+			dir_item_err(leaf, slot,
 			"xattr dir type found for non-XATTR key");
 			return -EUCLEAN;
 		}
@@ -300,13 +343,13 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
 		name_len = btrfs_dir_name_len(leaf, di);
 		data_len = btrfs_dir_data_len(leaf, di);
 		if (name_len > max_name_len) {
-			dir_item_err(fs_info, leaf, slot,
+			dir_item_err(leaf, slot,
 			"dir item name len too long, have %u max %u",
 				name_len, max_name_len);
 			return -EUCLEAN;
 		}
 		if (name_len + data_len > BTRFS_MAX_XATTR_SIZE(fs_info)) {
-			dir_item_err(fs_info, leaf, slot,
+			dir_item_err(leaf, slot,
 			"dir item name and data len too long, have %u max %u",
 				name_len + data_len,
 				BTRFS_MAX_XATTR_SIZE(fs_info));
@@ -314,7 +357,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
 		}
 
 		if (data_len && dir_type != BTRFS_FT_XATTR) {
-			dir_item_err(fs_info, leaf, slot,
+			dir_item_err(leaf, slot,
 			"dir item with invalid data len, have %u expect 0",
 				data_len);
 			return -EUCLEAN;
@@ -324,7 +367,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
 
 		/* header and name/data should not cross item boundary */
 		if (cur + total_size > item_size) {
-			dir_item_err(fs_info, leaf, slot,
+			dir_item_err(leaf, slot,
 		"dir item data crosses item boundary, have %u boundary %u",
 				cur + total_size, item_size);
 			return -EUCLEAN;
@@ -342,7 +385,7 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
 					(unsigned long)(di + 1), name_len);
 			name_hash = btrfs_name_hash(namebuf, name_len);
 			if (key->offset != name_hash) {
-				dir_item_err(fs_info, leaf, slot,
+				dir_item_err(leaf, slot,
 		"name hash mismatch with key, have 0x%016x expect 0x%016llx",
 					name_hash, key->offset);
 				return -EUCLEAN;
@@ -354,12 +397,12 @@ static int check_dir_item(struct btrfs_fs_info *fs_info,
 	return 0;
 }
 
-__printf(4, 5)
+__printf(3, 4)
 __cold
-static void block_group_err(const struct btrfs_fs_info *fs_info,
-			    const struct extent_buffer *eb, int slot,
+static void block_group_err(const struct extent_buffer *eb, int slot,
 			    const char *fmt, ...)
 {
+	const struct btrfs_fs_info *fs_info = eb->fs_info;
 	struct btrfs_key key;
 	struct va_format vaf;
 	va_list args;
@@ -378,8 +421,7 @@ static void block_group_err(const struct btrfs_fs_info *fs_info,
 	va_end(args);
 }
 
-static int check_block_group_item(struct btrfs_fs_info *fs_info,
-				  struct extent_buffer *leaf,
+static int check_block_group_item(struct extent_buffer *leaf,
 				  struct btrfs_key *key, int slot)
 {
 	struct btrfs_block_group_item bgi;
@@ -392,13 +434,13 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
 	 * handle it.  We care more about the size.
 	 */
 	if (key->offset == 0) {
-		block_group_err(fs_info, leaf, slot,
+		block_group_err(leaf, slot,
 				"invalid block group size 0");
 		return -EUCLEAN;
 	}
 
 	if (item_size != sizeof(bgi)) {
-		block_group_err(fs_info, leaf, slot,
+		block_group_err(leaf, slot,
 			"invalid item size, have %u expect %zu",
 				item_size, sizeof(bgi));
 		return -EUCLEAN;
@@ -408,7 +450,7 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
 			   sizeof(bgi));
 	if (btrfs_block_group_chunk_objectid(&bgi) !=
 	    BTRFS_FIRST_CHUNK_TREE_OBJECTID) {
-		block_group_err(fs_info, leaf, slot,
+		block_group_err(leaf, slot,
 		"invalid block group chunk objectid, have %llu expect %llu",
 				btrfs_block_group_chunk_objectid(&bgi),
 				BTRFS_FIRST_CHUNK_TREE_OBJECTID);
@@ -416,7 +458,7 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
 	}
 
 	if (btrfs_block_group_used(&bgi) > key->offset) {
-		block_group_err(fs_info, leaf, slot,
+		block_group_err(leaf, slot,
 			"invalid block group used, have %llu expect [0, %llu)",
 				btrfs_block_group_used(&bgi), key->offset);
 		return -EUCLEAN;
@@ -424,7 +466,7 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
 
 	flags = btrfs_block_group_flags(&bgi);
 	if (hweight64(flags & BTRFS_BLOCK_GROUP_PROFILE_MASK) > 1) {
-		block_group_err(fs_info, leaf, slot,
+		block_group_err(leaf, slot,
 "invalid profile flags, have 0x%llx (%lu bits set) expect no more than 1 bit set",
 			flags & BTRFS_BLOCK_GROUP_PROFILE_MASK,
 			hweight64(flags & BTRFS_BLOCK_GROUP_PROFILE_MASK));
@@ -437,7 +479,7 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
 	    type != BTRFS_BLOCK_GROUP_SYSTEM &&
 	    type != (BTRFS_BLOCK_GROUP_METADATA |
 			   BTRFS_BLOCK_GROUP_DATA)) {
-		block_group_err(fs_info, leaf, slot,
+		block_group_err(leaf, slot,
 "invalid type, have 0x%llx (%lu bits set) expect either 0x%llx, 0x%llx, 0x%llx or 0x%llx",
 			type, hweight64(type),
 			BTRFS_BLOCK_GROUP_DATA, BTRFS_BLOCK_GROUP_METADATA,
@@ -448,37 +490,368 @@ static int check_block_group_item(struct btrfs_fs_info *fs_info,
 	return 0;
 }
 
+__printf(4, 5)
+__cold
+static void chunk_err(const struct extent_buffer *leaf,
+		      const struct btrfs_chunk *chunk, u64 logical,
+		      const char *fmt, ...)
+{
+	const struct btrfs_fs_info *fs_info = leaf->fs_info;
+	bool is_sb;
+	struct va_format vaf;
+	va_list args;
+	int i;
+	int slot = -1;
+
+	/* Only superblock eb is able to have such small offset */
+	is_sb = (leaf->start == BTRFS_SUPER_INFO_OFFSET);
+
+	if (!is_sb) {
+		/*
+		 * Get the slot number by iterating through all slots, this
+		 * would provide better readability.
+		 */
+		for (i = 0; i < btrfs_header_nritems(leaf); i++) {
+			if (btrfs_item_ptr_offset(leaf, i) ==
+					(unsigned long)chunk) {
+				slot = i;
+				break;
+			}
+		}
+	}
+	va_start(args, fmt);
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	if (is_sb)
+		btrfs_crit(fs_info,
+		"corrupt superblock syschunk array: chunk_start=%llu, %pV",
+			   logical, &vaf);
+	else
+		btrfs_crit(fs_info,
+	"corrupt leaf: root=%llu block=%llu slot=%d chunk_start=%llu, %pV",
+			   BTRFS_CHUNK_TREE_OBJECTID, leaf->start, slot,
+			   logical, &vaf);
+	va_end(args);
+}
+
+/*
+ * The common chunk check which could also work on super block sys chunk array.
+ *
+ * Return -EUCLEAN if anything is corrupted.
+ * Return 0 if everything is OK.
+ */
+int btrfs_check_chunk_valid(struct extent_buffer *leaf,
+			    struct btrfs_chunk *chunk, u64 logical)
+{
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
+	u64 length;
+	u64 stripe_len;
+	u16 num_stripes;
+	u16 sub_stripes;
+	u64 type;
+	u64 features;
+	bool mixed = false;
+
+	length = btrfs_chunk_length(leaf, chunk);
+	stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
+	num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
+	sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
+	type = btrfs_chunk_type(leaf, chunk);
+
+	if (!num_stripes) {
+		chunk_err(leaf, chunk, logical,
+			  "invalid chunk num_stripes, have %u", num_stripes);
+		return -EUCLEAN;
+	}
+	if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
+		chunk_err(leaf, chunk, logical,
+		"invalid chunk logical, have %llu should aligned to %u",
+			  logical, fs_info->sectorsize);
+		return -EUCLEAN;
+	}
+	if (btrfs_chunk_sector_size(leaf, chunk) != fs_info->sectorsize) {
+		chunk_err(leaf, chunk, logical,
+			  "invalid chunk sectorsize, have %u expect %u",
+			  btrfs_chunk_sector_size(leaf, chunk),
+			  fs_info->sectorsize);
+		return -EUCLEAN;
+	}
+	if (!length || !IS_ALIGNED(length, fs_info->sectorsize)) {
+		chunk_err(leaf, chunk, logical,
+			  "invalid chunk length, have %llu", length);
+		return -EUCLEAN;
+	}
+	if (!is_power_of_2(stripe_len) || stripe_len != BTRFS_STRIPE_LEN) {
+		chunk_err(leaf, chunk, logical,
+			  "invalid chunk stripe length: %llu",
+			  stripe_len);
+		return -EUCLEAN;
+	}
+	if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
+	    type) {
+		chunk_err(leaf, chunk, logical,
+			  "unrecognized chunk type: 0x%llx",
+			  ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
+			    BTRFS_BLOCK_GROUP_PROFILE_MASK) &
+			  btrfs_chunk_type(leaf, chunk));
+		return -EUCLEAN;
+	}
+
+	if (!is_power_of_2(type & BTRFS_BLOCK_GROUP_PROFILE_MASK) &&
+	    (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) != 0) {
+		chunk_err(leaf, chunk, logical,
+		"invalid chunk profile flag: 0x%llx, expect 0 or 1 bit set",
+			  type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
+		return -EUCLEAN;
+	}
+	if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
+		chunk_err(leaf, chunk, logical,
+	"missing chunk type flag, have 0x%llx one bit must be set in 0x%llx",
+			  type, BTRFS_BLOCK_GROUP_TYPE_MASK);
+		return -EUCLEAN;
+	}
+
+	if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
+	    (type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
+		chunk_err(leaf, chunk, logical,
+			  "system chunk with data or metadata type: 0x%llx",
+			  type);
+		return -EUCLEAN;
+	}
+
+	features = btrfs_super_incompat_flags(fs_info->super_copy);
+	if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
+		mixed = true;
+
+	if (!mixed) {
+		if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
+		    (type & BTRFS_BLOCK_GROUP_DATA)) {
+			chunk_err(leaf, chunk, logical,
+			"mixed chunk type in non-mixed mode: 0x%llx", type);
+			return -EUCLEAN;
+		}
+	}
+
+	if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
+	    (type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes != 2) ||
+	    (type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
+	    (type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
+	    (type & BTRFS_BLOCK_GROUP_DUP && num_stripes != 2) ||
+	    ((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 && num_stripes != 1)) {
+		chunk_err(leaf, chunk, logical,
+			"invalid num_stripes:sub_stripes %u:%u for profile %llu",
+			num_stripes, sub_stripes,
+			type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
+		return -EUCLEAN;
+	}
+
+	return 0;
+}
+
+__printf(3, 4)
+__cold
+static void dev_item_err(const struct extent_buffer *eb, int slot,
+			 const char *fmt, ...)
+{
+	struct btrfs_key key;
+	struct va_format vaf;
+	va_list args;
+
+	btrfs_item_key_to_cpu(eb, &key, slot);
+	va_start(args, fmt);
+
+	vaf.fmt = fmt;
+	vaf.va = &args;
+
+	btrfs_crit(eb->fs_info,
+	"corrupt %s: root=%llu block=%llu slot=%d devid=%llu %pV",
+		btrfs_header_level(eb) == 0 ? "leaf" : "node",
+		btrfs_header_owner(eb), btrfs_header_bytenr(eb), slot,
+		key.objectid, &vaf);
+	va_end(args);
+}
+
+static int check_dev_item(struct extent_buffer *leaf,
+			  struct btrfs_key *key, int slot)
+{
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
+	struct btrfs_dev_item *ditem;
+	u64 max_devid = max(BTRFS_MAX_DEVS(fs_info), BTRFS_MAX_DEVS_SYS_CHUNK);
+
+	if (key->objectid != BTRFS_DEV_ITEMS_OBJECTID) {
+		dev_item_err(leaf, slot,
+			     "invalid objectid: has=%llu expect=%llu",
+			     key->objectid, BTRFS_DEV_ITEMS_OBJECTID);
+		return -EUCLEAN;
+	}
+	if (key->offset > max_devid) {
+		dev_item_err(leaf, slot,
+			     "invalid devid: has=%llu expect=[0, %llu]",
+			     key->offset, max_devid);
+		return -EUCLEAN;
+	}
+	ditem = btrfs_item_ptr(leaf, slot, struct btrfs_dev_item);
+	if (btrfs_device_id(leaf, ditem) != key->offset) {
+		dev_item_err(leaf, slot,
+			     "devid mismatch: key has=%llu item has=%llu",
+			     key->offset, btrfs_device_id(leaf, ditem));
+		return -EUCLEAN;
+	}
+
+	/*
+	 * For device total_bytes, we don't have reliable way to check it, as
+	 * it can be 0 for device removal. Device size check can only be done
+	 * by dev extents check.
+	 */
+	if (btrfs_device_bytes_used(leaf, ditem) >
+	    btrfs_device_total_bytes(leaf, ditem)) {
+		dev_item_err(leaf, slot,
+			     "invalid bytes used: have %llu expect [0, %llu]",
+			     btrfs_device_bytes_used(leaf, ditem),
+			     btrfs_device_total_bytes(leaf, ditem));
+		return -EUCLEAN;
+	}
+	/*
+	 * Remaining members like io_align/type/gen/dev_group aren't really
+	 * utilized.  Skip them to make later usage of them easier.
+	 */
+	return 0;
+}
+
+/* Inode item error output has the same format as dir_item_err() */
+#define inode_item_err(fs_info, eb, slot, fmt, ...)			\
+	dir_item_err(eb, slot, fmt, __VA_ARGS__)
+
+static int check_inode_item(struct extent_buffer *leaf,
+			    struct btrfs_key *key, int slot)
+{
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
+	struct btrfs_inode_item *iitem;
+	u64 super_gen = btrfs_super_generation(fs_info->super_copy);
+	u32 valid_mask = (S_IFMT | S_ISUID | S_ISGID | S_ISVTX | 0777);
+	u32 mode;
+
+	if ((key->objectid < BTRFS_FIRST_FREE_OBJECTID ||
+	     key->objectid > BTRFS_LAST_FREE_OBJECTID) &&
+	    key->objectid != BTRFS_ROOT_TREE_DIR_OBJECTID &&
+	    key->objectid != BTRFS_FREE_INO_OBJECTID) {
+		generic_err(leaf, slot,
+	"invalid key objectid: has %llu expect %llu or [%llu, %llu] or %llu",
+			    key->objectid, BTRFS_ROOT_TREE_DIR_OBJECTID,
+			    BTRFS_FIRST_FREE_OBJECTID,
+			    BTRFS_LAST_FREE_OBJECTID,
+			    BTRFS_FREE_INO_OBJECTID);
+		return -EUCLEAN;
+	}
+	if (key->offset != 0) {
+		inode_item_err(fs_info, leaf, slot,
+			"invalid key offset: has %llu expect 0",
+			key->offset);
+		return -EUCLEAN;
+	}
+	iitem = btrfs_item_ptr(leaf, slot, struct btrfs_inode_item);
+
+	/* Here we use super block generation + 1 to handle log tree */
+	if (btrfs_inode_generation(leaf, iitem) > super_gen + 1) {
+		inode_item_err(fs_info, leaf, slot,
+			"invalid inode generation: has %llu expect (0, %llu]",
+			       btrfs_inode_generation(leaf, iitem),
+			       super_gen + 1);
+		return -EUCLEAN;
+	}
+	/* Note for ROOT_TREE_DIR_ITEM, mkfs could set its transid 0 */
+	if (btrfs_inode_transid(leaf, iitem) > super_gen + 1) {
+		inode_item_err(fs_info, leaf, slot,
+			"invalid inode generation: has %llu expect [0, %llu]",
+			       btrfs_inode_transid(leaf, iitem), super_gen + 1);
+		return -EUCLEAN;
+	}
+
+	/*
+	 * For size and nbytes it's better not to be too strict, as for dir
+	 * item its size/nbytes can easily get wrong, but doesn't affect
+	 * anything in the fs. So here we skip the check.
+	 */
+	mode = btrfs_inode_mode(leaf, iitem);
+	if (mode & ~valid_mask) {
+		inode_item_err(fs_info, leaf, slot,
+			       "unknown mode bit detected: 0x%x",
+			       mode & ~valid_mask);
+		return -EUCLEAN;
+	}
+
+	/*
+	 * S_IFMT is not bit mapped so we can't completely rely on is_power_of_2,
+	 * but is_power_of_2() can save us from checking FIFO/CHR/DIR/REG.
+	 * Only needs to check BLK, LNK and SOCKS
+	 */
+	if (!is_power_of_2(mode & S_IFMT)) {
+		if (!S_ISLNK(mode) && !S_ISBLK(mode) && !S_ISSOCK(mode)) {
+			inode_item_err(fs_info, leaf, slot,
+			"invalid mode: has 0%o expect valid S_IF* bit(s)",
+				       mode & S_IFMT);
+			return -EUCLEAN;
+		}
+	}
+	if (S_ISDIR(mode) && btrfs_inode_nlink(leaf, iitem) > 1) {
+		inode_item_err(fs_info, leaf, slot,
+		       "invalid nlink: has %u expect no more than 1 for dir",
+			btrfs_inode_nlink(leaf, iitem));
+		return -EUCLEAN;
+	}
+	if (btrfs_inode_flags(leaf, iitem) & ~BTRFS_INODE_FLAG_MASK) {
+		inode_item_err(fs_info, leaf, slot,
+			       "unknown flags detected: 0x%llx",
+			       btrfs_inode_flags(leaf, iitem) &
+			       ~BTRFS_INODE_FLAG_MASK);
+		return -EUCLEAN;
+	}
+	return 0;
+}
+
 /*
  * Common point to switch the item-specific validation.
  */
-static int check_leaf_item(struct btrfs_fs_info *fs_info,
-			   struct extent_buffer *leaf,
-			   struct btrfs_key *key, int slot)
+static int check_leaf_item(struct extent_buffer *leaf,
+			   struct btrfs_key *key, int slot,
+			   struct btrfs_key *prev_key)
 {
 	int ret = 0;
+	struct btrfs_chunk *chunk;
 
 	switch (key->type) {
 	case BTRFS_EXTENT_DATA_KEY:
-		ret = check_extent_data_item(fs_info, leaf, key, slot);
+		ret = check_extent_data_item(leaf, key, slot, prev_key);
 		break;
 	case BTRFS_EXTENT_CSUM_KEY:
-		ret = check_csum_item(fs_info, leaf, key, slot);
+		ret = check_csum_item(leaf, key, slot);
 		break;
 	case BTRFS_DIR_ITEM_KEY:
 	case BTRFS_DIR_INDEX_KEY:
 	case BTRFS_XATTR_ITEM_KEY:
-		ret = check_dir_item(fs_info, leaf, key, slot);
+		ret = check_dir_item(leaf, key, slot);
 		break;
 	case BTRFS_BLOCK_GROUP_ITEM_KEY:
-		ret = check_block_group_item(fs_info, leaf, key, slot);
+		ret = check_block_group_item(leaf, key, slot);
+		break;
+	case BTRFS_CHUNK_ITEM_KEY:
+		chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
+		ret = btrfs_check_chunk_valid(leaf, chunk, key->offset);
+		break;
+	case BTRFS_DEV_ITEM_KEY:
+		ret = check_dev_item(leaf, key, slot);
+		break;
+	case BTRFS_INODE_ITEM_KEY:
+		ret = check_inode_item(leaf, key, slot);
 		break;
 	}
 	return ret;
 }
 
-static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
-		      bool check_item_data)
+static int check_leaf(struct extent_buffer *leaf, bool check_item_data)
 {
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
 	/* No valid key type is 0, so all key should be larger than this key */
 	struct btrfs_key prev_key = {0, 0, 0};
 	struct btrfs_key key;
@@ -486,7 +859,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
 	int slot;
 
 	if (btrfs_header_level(leaf) != 0) {
-		generic_err(fs_info, leaf, 0,
+		generic_err(leaf, 0,
 			"invalid level for leaf, have %d expect 0",
 			btrfs_header_level(leaf));
 		return -EUCLEAN;
@@ -502,7 +875,6 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
 	 */
 	if (nritems == 0 && !btrfs_header_flag(leaf, BTRFS_HEADER_FLAG_RELOC)) {
 		u64 owner = btrfs_header_owner(leaf);
-		struct btrfs_root *check_root;
 
 		/* These trees must never be empty */
 		if (owner == BTRFS_ROOT_TREE_OBJECTID ||
@@ -511,34 +883,11 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
 		    owner == BTRFS_DEV_TREE_OBJECTID ||
 		    owner == BTRFS_FS_TREE_OBJECTID ||
 		    owner == BTRFS_DATA_RELOC_TREE_OBJECTID) {
-			generic_err(fs_info, leaf, 0,
+			generic_err(leaf, 0,
 			"invalid root, root %llu must never be empty",
 				    owner);
 			return -EUCLEAN;
 		}
-		key.objectid = owner;
-		key.type = BTRFS_ROOT_ITEM_KEY;
-		key.offset = (u64)-1;
-
-		check_root = btrfs_get_fs_root(fs_info, &key, false);
-		/*
-		 * The only reason we also check NULL here is that during
-		 * open_ctree() some roots has not yet been set up.
-		 */
-		if (!IS_ERR_OR_NULL(check_root)) {
-			struct extent_buffer *eb;
-
-			eb = btrfs_root_node(check_root);
-			/* if leaf is the root, then it's fine */
-			if (leaf != eb) {
-				generic_err(fs_info, leaf, 0,
-		"invalid nritems, have %u should not be 0 for non-root leaf",
-					nritems);
-				free_extent_buffer(eb);
-				return -EUCLEAN;
-			}
-			free_extent_buffer(eb);
-		}
 		return 0;
 	}
 
@@ -564,7 +913,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
 
 		/* Make sure the keys are in the right order */
 		if (btrfs_comp_cpu_keys(&prev_key, &key) >= 0) {
-			generic_err(fs_info, leaf, slot,
+			generic_err(leaf, slot,
 	"bad key order, prev (%llu %u %llu) current (%llu %u %llu)",
 				prev_key.objectid, prev_key.type,
 				prev_key.offset, key.objectid, key.type,
@@ -583,7 +932,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
 			item_end_expected = btrfs_item_offset_nr(leaf,
 								 slot - 1);
 		if (btrfs_item_end_nr(leaf, slot) != item_end_expected) {
-			generic_err(fs_info, leaf, slot,
+			generic_err(leaf, slot,
 				"unexpected item end, have %u expect %u",
 				btrfs_item_end_nr(leaf, slot),
 				item_end_expected);
@@ -597,7 +946,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
 		 */
 		if (btrfs_item_end_nr(leaf, slot) >
 		    BTRFS_LEAF_DATA_SIZE(fs_info)) {
-			generic_err(fs_info, leaf, slot,
+			generic_err(leaf, slot,
 			"slot end outside of leaf, have %u expect range [0, %u]",
 				btrfs_item_end_nr(leaf, slot),
 				BTRFS_LEAF_DATA_SIZE(fs_info));
@@ -607,7 +956,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
 		/* Also check if the item pointer overlaps with btrfs item. */
 		if (btrfs_item_nr_offset(slot) + sizeof(struct btrfs_item) >
 		    btrfs_item_ptr_offset(leaf, slot)) {
-			generic_err(fs_info, leaf, slot,
+			generic_err(leaf, slot,
 		"slot overlaps with its data, item end %lu data start %lu",
 				btrfs_item_nr_offset(slot) +
 				sizeof(struct btrfs_item),
@@ -620,7 +969,7 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
 			 * Check if the item size and content meet other
 			 * criteria
 			 */
-			ret = check_leaf_item(fs_info, leaf, &key, slot);
+			ret = check_leaf_item(leaf, &key, slot, &prev_key);
 			if (ret < 0)
 				return ret;
 		}
@@ -633,20 +982,20 @@ static int check_leaf(struct btrfs_fs_info *fs_info, struct extent_buffer *leaf,
 	return 0;
 }
 
-int btrfs_check_leaf_full(struct btrfs_fs_info *fs_info,
-			  struct extent_buffer *leaf)
+int btrfs_check_leaf_full(struct extent_buffer *leaf)
 {
-	return check_leaf(fs_info, leaf, true);
+	return check_leaf(leaf, true);
 }
+ALLOW_ERROR_INJECTION(btrfs_check_leaf_full, ERRNO);
 
-int btrfs_check_leaf_relaxed(struct btrfs_fs_info *fs_info,
-			     struct extent_buffer *leaf)
+int btrfs_check_leaf_relaxed(struct extent_buffer *leaf)
 {
-	return check_leaf(fs_info, leaf, false);
+	return check_leaf(leaf, false);
 }
 
-int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
+int btrfs_check_node(struct extent_buffer *node)
 {
+	struct btrfs_fs_info *fs_info = node->fs_info;
 	unsigned long nr = btrfs_header_nritems(node);
 	struct btrfs_key key, next_key;
 	int slot;
@@ -655,7 +1004,7 @@ int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
 	int ret = 0;
 
 	if (level <= 0 || level >= BTRFS_MAX_LEVEL) {
-		generic_err(fs_info, node, 0,
+		generic_err(node, 0,
 			"invalid level for node, have %d expect [1, %d]",
 			level, BTRFS_MAX_LEVEL - 1);
 		return -EUCLEAN;
@@ -675,13 +1024,13 @@ int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
 		btrfs_node_key_to_cpu(node, &next_key, slot + 1);
 
 		if (!bytenr) {
-			generic_err(fs_info, node, slot,
+			generic_err(node, slot,
 				"invalid NULL node pointer");
 			ret = -EUCLEAN;
 			goto out;
 		}
 		if (!IS_ALIGNED(bytenr, fs_info->sectorsize)) {
-			generic_err(fs_info, node, slot,
+			generic_err(node, slot,
 			"unaligned pointer, have %llu should be aligned to %u",
 				bytenr, fs_info->sectorsize);
 			ret = -EUCLEAN;
@@ -689,7 +1038,7 @@ int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
 		}
 
 		if (btrfs_comp_cpu_keys(&key, &next_key) >= 0) {
-			generic_err(fs_info, node, slot,
+			generic_err(node, slot,
 	"bad key order, current (%llu %u %llu) next (%llu %u %llu)",
 				key.objectid, key.type, key.offset,
 				next_key.objectid, next_key.type,
@@ -701,3 +1050,4 @@ int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node)
 out:
 	return ret;
 }
+ALLOW_ERROR_INJECTION(btrfs_check_node, ERRNO);
diff --git a/fs/btrfs/tree-checker.h b/fs/btrfs/tree-checker.h
index ff043275b784..32fecc9dc1dd 100644
--- a/fs/btrfs/tree-checker.h
+++ b/fs/btrfs/tree-checker.h
@@ -14,15 +14,16 @@
  * Will check not only the item pointers, but also every possible member
  * in item data.
  */
-int btrfs_check_leaf_full(struct btrfs_fs_info *fs_info,
-			  struct extent_buffer *leaf);
+int btrfs_check_leaf_full(struct extent_buffer *leaf);
 
 /*
  * Less strict leaf checker.
  * Will only check item pointers, not reading item data.
  */
-int btrfs_check_leaf_relaxed(struct btrfs_fs_info *fs_info,
-			     struct extent_buffer *leaf);
-int btrfs_check_node(struct btrfs_fs_info *fs_info, struct extent_buffer *node);
+int btrfs_check_leaf_relaxed(struct extent_buffer *leaf);
+int btrfs_check_node(struct extent_buffer *node);
+
+int btrfs_check_chunk_valid(struct extent_buffer *leaf,
+			    struct btrfs_chunk *chunk, u64 logical);
 
 #endif
diff --git a/fs/btrfs/tree-defrag.c b/fs/btrfs/tree-defrag.c
index 3c0987ab587d..5f9e2dd413af 100644
--- a/fs/btrfs/tree-defrag.c
+++ b/fs/btrfs/tree-defrag.c
@@ -52,7 +52,7 @@ int btrfs_defrag_leaves(struct btrfs_trans_handle *trans,
 		u32 nritems;
 
 		root_node = btrfs_lock_root_node(root);
-		btrfs_set_lock_blocking(root_node);
+		btrfs_set_lock_blocking_write(root_node);
 		nritems = btrfs_header_nritems(root_node);
 		root->defrag_max.objectid = 0;
 		/* from above we know this is not a leaf */
diff --git a/fs/btrfs/tree-log.c b/fs/btrfs/tree-log.c
index ac232b3d6d7e..3fc8d854d7fb 100644
--- a/fs/btrfs/tree-log.c
+++ b/fs/btrfs/tree-log.c
@@ -27,6 +27,7 @@
 #define LOG_INODE_ALL 0
 #define LOG_INODE_EXISTS 1
 #define LOG_OTHER_INODE 2
+#define LOG_OTHER_INODE_ALL 3
 
 /*
  * directory trouble cases
@@ -138,7 +139,7 @@ static int start_log_trans(struct btrfs_trans_handle *trans,
 	mutex_lock(&root->log_mutex);
 
 	if (root->log_root) {
-		if (btrfs_need_log_full_commit(fs_info, trans)) {
+		if (btrfs_need_log_full_commit(trans)) {
 			ret = -EAGAIN;
 			goto out;
 		}
@@ -224,6 +225,17 @@ void btrfs_end_log_trans(struct btrfs_root *root)
 	}
 }
 
+static int btrfs_write_tree_block(struct extent_buffer *buf)
+{
+	return filemap_fdatawrite_range(buf->pages[0]->mapping, buf->start,
+					buf->start + buf->len - 1);
+}
+
+static void btrfs_wait_tree_block_writeback(struct extent_buffer *buf)
+{
+	filemap_fdatawait_range(buf->pages[0]->mapping,
+			        buf->start, buf->start + buf->len - 1);
+}
 
 /*
  * the walk control struct is used to pass state down the chain when
@@ -303,7 +315,7 @@ static int process_one_buffer(struct btrfs_root *log,
 
 	if (!ret && btrfs_buffer_uptodate(eb, gen, 0)) {
 		if (wc->pin && btrfs_header_level(eb) == 0)
-			ret = btrfs_exclude_logged_extents(fs_info, eb);
+			ret = btrfs_exclude_logged_extents(eb);
 		if (wc->write)
 			btrfs_write_tree_block(eb);
 		if (wc->wait)
@@ -332,7 +344,6 @@ static noinline int overwrite_item(struct btrfs_trans_handle *trans,
 				   struct extent_buffer *eb, int slot,
 				   struct btrfs_key *key)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	int ret;
 	u32 item_size;
 	u64 saved_i_size = 0;
@@ -453,10 +464,9 @@ insert:
 		found_size = btrfs_item_size_nr(path->nodes[0],
 						path->slots[0]);
 		if (found_size > item_size)
-			btrfs_truncate_item(fs_info, path, item_size, 1);
+			btrfs_truncate_item(path, item_size, 1);
 		else if (found_size < item_size)
-			btrfs_extend_item(fs_info, path,
-					  item_size - found_size);
+			btrfs_extend_item(path, item_size - found_size);
 	} else if (ret) {
 		return ret;
 	}
@@ -693,9 +703,11 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
 			goto out;
 
 		if (ins.objectid > 0) {
+			struct btrfs_ref ref = { 0 };
 			u64 csum_start;
 			u64 csum_end;
 			LIST_HEAD(ordered_sums);
+
 			/*
 			 * is this extent already allocated in the extent
 			 * allocation tree?  If so, just add a reference
@@ -703,10 +715,13 @@ static noinline int replay_one_extent(struct btrfs_trans_handle *trans,
 			ret = btrfs_lookup_data_extent(fs_info, ins.objectid,
 						ins.offset);
 			if (ret == 0) {
-				ret = btrfs_inc_extent_ref(trans, root,
-						ins.objectid, ins.offset,
-						0, root->root_key.objectid,
+				btrfs_init_generic_ref(&ref,
+						BTRFS_ADD_DELAYED_REF,
+						ins.objectid, ins.offset, 0);
+				btrfs_init_data_ref(&ref,
+						root->root_key.objectid,
 						key->objectid, offset);
+				ret = btrfs_inc_extent_ref(trans, &ref);
 				if (ret)
 					goto out;
 			} else {
@@ -1330,6 +1345,67 @@ out:
 	return ret;
 }
 
+static int add_link(struct btrfs_trans_handle *trans, struct btrfs_root *root,
+		    struct inode *dir, struct inode *inode, const char *name,
+		    int namelen, u64 ref_index)
+{
+	struct btrfs_dir_item *dir_item;
+	struct btrfs_key key;
+	struct btrfs_path *path;
+	struct inode *other_inode = NULL;
+	int ret;
+
+	path = btrfs_alloc_path();
+	if (!path)
+		return -ENOMEM;
+
+	dir_item = btrfs_lookup_dir_item(NULL, root, path,
+					 btrfs_ino(BTRFS_I(dir)),
+					 name, namelen, 0);
+	if (!dir_item) {
+		btrfs_release_path(path);
+		goto add_link;
+	} else if (IS_ERR(dir_item)) {
+		ret = PTR_ERR(dir_item);
+		goto out;
+	}
+
+	/*
+	 * Our inode's dentry collides with the dentry of another inode which is
+	 * in the log but not yet processed since it has a higher inode number.
+	 * So delete that other dentry.
+	 */
+	btrfs_dir_item_key_to_cpu(path->nodes[0], dir_item, &key);
+	btrfs_release_path(path);
+	other_inode = read_one_inode(root, key.objectid);
+	if (!other_inode) {
+		ret = -ENOENT;
+		goto out;
+	}
+	ret = btrfs_unlink_inode(trans, root, BTRFS_I(dir), BTRFS_I(other_inode),
+				 name, namelen);
+	if (ret)
+		goto out;
+	/*
+	 * If we dropped the link count to 0, bump it so that later the iput()
+	 * on the inode will not free it. We will fixup the link count later.
+	 */
+	if (other_inode->i_nlink == 0)
+		inc_nlink(other_inode);
+
+	ret = btrfs_run_delayed_items(trans);
+	if (ret)
+		goto out;
+add_link:
+	ret = btrfs_add_link(trans, BTRFS_I(dir), BTRFS_I(inode),
+			     name, namelen, 0, ref_index);
+out:
+	iput(other_inode);
+	btrfs_free_path(path);
+
+	return ret;
+}
+
 /*
  * replay one inode back reference item found in the log tree.
  * eb, slot and key refer to the buffer and key found in the log tree.
@@ -1466,9 +1542,8 @@ static noinline int add_inode_ref(struct btrfs_trans_handle *trans,
 				goto out;
 
 			/* insert our name */
-			ret = btrfs_add_link(trans, BTRFS_I(dir),
-					BTRFS_I(inode),
-					name, namelen, 0, ref_index);
+			ret = add_link(trans, root, dir, inode, name, namelen,
+				       ref_index);
 			if (ret)
 				goto out;
 
@@ -2663,8 +2738,8 @@ static noinline int walk_down_log_tree(struct btrfs_trans_handle *trans,
 
 				if (trans) {
 					btrfs_tree_lock(next);
-					btrfs_set_lock_blocking(next);
-					clean_tree_block(fs_info, next);
+					btrfs_set_lock_blocking_write(next);
+					btrfs_clean_tree_block(next);
 					btrfs_wait_tree_block_writeback(next);
 					btrfs_tree_unlock(next);
 				} else {
@@ -2747,8 +2822,8 @@ static noinline int walk_up_log_tree(struct btrfs_trans_handle *trans,
 
 				if (trans) {
 					btrfs_tree_lock(next);
-					btrfs_set_lock_blocking(next);
-					clean_tree_block(fs_info, next);
+					btrfs_set_lock_blocking_write(next);
+					btrfs_clean_tree_block(next);
 					btrfs_wait_tree_block_writeback(next);
 					btrfs_tree_unlock(next);
 				} else {
@@ -2829,8 +2904,8 @@ static int walk_log_tree(struct btrfs_trans_handle *trans,
 
 			if (trans) {
 				btrfs_tree_lock(next);
-				btrfs_set_lock_blocking(next);
-				clean_tree_block(fs_info, next);
+				btrfs_set_lock_blocking_write(next);
+				btrfs_clean_tree_block(next);
 				btrfs_wait_tree_block_writeback(next);
 				btrfs_tree_unlock(next);
 			} else {
@@ -3005,7 +3080,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 	}
 
 	/* bail out if we need to do a full commit */
-	if (btrfs_need_log_full_commit(fs_info, trans)) {
+	if (btrfs_need_log_full_commit(trans)) {
 		ret = -EAGAIN;
 		mutex_unlock(&root->log_mutex);
 		goto out;
@@ -3024,7 +3099,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 	if (ret) {
 		blk_finish_plug(&plug);
 		btrfs_abort_transaction(trans, ret);
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 		mutex_unlock(&root->log_mutex);
 		goto out;
 	}
@@ -3035,6 +3110,12 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 	log->log_transid = root->log_transid;
 	root->log_start_pid = 0;
 	/*
+	 * Update or create log root item under the root's log_mutex to prevent
+	 * races with concurrent log syncs that can lead to failure to update
+	 * log root item because it was not created yet.
+	 */
+	ret = update_log_root(trans, log);
+	/*
 	 * IO has been started, blocks of the log tree have WRITTEN flag set
 	 * in their headers. new modifications of the log will be written to
 	 * new positions. so it's safe to allow log writers to go in.
@@ -3053,8 +3134,6 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 
 	mutex_unlock(&log_root_tree->log_mutex);
 
-	ret = update_log_root(trans, log);
-
 	mutex_lock(&log_root_tree->log_mutex);
 	if (atomic_dec_and_test(&log_root_tree->log_writers)) {
 		/* atomic_dec_and_test implies a barrier */
@@ -3066,7 +3145,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 			list_del_init(&root_log_ctx.list);
 
 		blk_finish_plug(&plug);
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 
 		if (ret != -ENOSPC) {
 			btrfs_abort_transaction(trans, ret);
@@ -3112,7 +3191,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 	 * now that we've moved on to the tree of log tree roots,
 	 * check the full commit flag again
 	 */
-	if (btrfs_need_log_full_commit(fs_info, trans)) {
+	if (btrfs_need_log_full_commit(trans)) {
 		blk_finish_plug(&plug);
 		btrfs_wait_tree_log_extents(log, mark);
 		mutex_unlock(&log_root_tree->log_mutex);
@@ -3125,7 +3204,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 					 EXTENT_DIRTY | EXTENT_NEW);
 	blk_finish_plug(&plug);
 	if (ret) {
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 		btrfs_abort_transaction(trans, ret);
 		mutex_unlock(&log_root_tree->log_mutex);
 		goto out_wake_log_root;
@@ -3135,7 +3214,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 		ret = btrfs_wait_tree_log_extents(log_root_tree,
 						  EXTENT_NEW | EXTENT_DIRTY);
 	if (ret) {
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 		mutex_unlock(&log_root_tree->log_mutex);
 		goto out_wake_log_root;
 	}
@@ -3157,7 +3236,7 @@ int btrfs_sync_log(struct btrfs_trans_handle *trans,
 	 */
 	ret = write_all_supers(fs_info, 1);
 	if (ret) {
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 		btrfs_abort_transaction(trans, ret);
 		goto out_wake_log_root;
 	}
@@ -3361,7 +3440,7 @@ fail:
 out_unlock:
 	mutex_unlock(&dir->log_mutex);
 	if (ret == -ENOSPC) {
-		btrfs_set_log_full_commit(root->fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 		ret = 0;
 	} else if (ret < 0)
 		btrfs_abort_transaction(trans, ret);
@@ -3377,7 +3456,6 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
 			       const char *name, int name_len,
 			       struct btrfs_inode *inode, u64 dirid)
 {
-	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct btrfs_root *log;
 	u64 index;
 	int ret;
@@ -3395,7 +3473,7 @@ int btrfs_del_inode_ref_in_log(struct btrfs_trans_handle *trans,
 				  dirid, &index);
 	mutex_unlock(&inode->log_mutex);
 	if (ret == -ENOSPC) {
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 		ret = 0;
 	} else if (ret < 0 && ret != -ENOENT)
 		btrfs_abort_transaction(trans, ret);
@@ -3517,9 +3595,16 @@ static noinline int log_dir_items(struct btrfs_trans_handle *trans,
 	}
 	btrfs_release_path(path);
 
-	/* find the first key from this transaction again */
+	/*
+	 * Find the first key from this transaction again.  See the note for
+	 * log_new_dir_dentries, if we're logging a directory recursively we
+	 * won't be holding its i_mutex, which means we can modify the directory
+	 * while we're logging it.  If we remove an entry between our first
+	 * search and this search we'll not find the key again and can just
+	 * bail.
+	 */
 	ret = btrfs_search_slot(NULL, root, &min_key, path, 0, 0);
-	if (WARN_ON(ret != 0))
+	if (ret != 0)
 		goto done;
 
 	/*
@@ -3706,6 +3791,8 @@ static int drop_objectid_items(struct btrfs_trans_handle *trans,
 		found_key.type = 0;
 		ret = btrfs_bin_search(path->nodes[0], &found_key, 0,
 				       &start_slot);
+		if (ret < 0)
+			break;
 
 		ret = btrfs_del_items(trans, log, path, start_slot,
 				      path->slots[0] - start_slot + 1);
@@ -4099,6 +4186,7 @@ fill_holes:
 							       *last_extent, 0,
 							       0, len, 0, len,
 							       0, 0, 0);
+				*last_extent += len;
 			}
 		}
 	}
@@ -4481,6 +4569,19 @@ static int logged_inode_size(struct btrfs_root *log, struct btrfs_inode *inode,
 		item = btrfs_item_ptr(path->nodes[0], path->slots[0],
 				      struct btrfs_inode_item);
 		*size_ret = btrfs_inode_size(path->nodes[0], item);
+		/*
+		 * If the in-memory inode's i_size is smaller then the inode
+		 * size stored in the btree, return the inode's i_size, so
+		 * that we get a correct inode size after replaying the log
+		 * when before a power failure we had a shrinking truncate
+		 * followed by addition of a new name (rename / new hard link).
+		 * Otherwise return the inode size from the btree, to avoid
+		 * data loss when replaying a log due to previously doing a
+		 * write that expands the inode's size and logging a new name
+		 * immediately after.
+		 */
+		if (*size_ret > inode->vfs_inode.i_size)
+			*size_ret = inode->vfs_inode.i_size;
 	}
 
 	btrfs_release_path(path);
@@ -4642,15 +4743,8 @@ static int btrfs_log_trailing_hole(struct btrfs_trans_handle *trans,
 					struct btrfs_file_extent_item);
 
 		if (btrfs_file_extent_type(leaf, extent) ==
-		    BTRFS_FILE_EXTENT_INLINE) {
-			len = btrfs_file_extent_ram_bytes(leaf, extent);
-			ASSERT(len == i_size ||
-			       (len == fs_info->sectorsize &&
-				btrfs_file_extent_compression(leaf, extent) !=
-				BTRFS_COMPRESS_NONE) ||
-			       (len < i_size && i_size < fs_info->sectorsize));
+		    BTRFS_FILE_EXTENT_INLINE)
 			return 0;
-		}
 
 		len = btrfs_file_extent_num_bytes(leaf, extent);
 		/* Last extent goes beyond i_size, no need to log a hole. */
@@ -4717,7 +4811,7 @@ static int btrfs_check_ref_name_override(struct extent_buffer *eb,
 					 const int slot,
 					 const struct btrfs_key *key,
 					 struct btrfs_inode *inode,
-					 u64 *other_ino)
+					 u64 *other_ino, u64 *other_parent)
 {
 	int ret;
 	struct btrfs_path *search_path;
@@ -4780,8 +4874,13 @@ static int btrfs_check_ref_name_override(struct extent_buffer *eb,
 			btrfs_dir_item_key_to_cpu(search_path->nodes[0],
 						  di, &di_key);
 			if (di_key.type == BTRFS_INODE_ITEM_KEY) {
-				ret = 1;
-				*other_ino = di_key.objectid;
+				if (di_key.objectid != key->objectid) {
+					ret = 1;
+					*other_ino = di_key.objectid;
+					*other_parent = parent;
+				} else {
+					ret = 0;
+				}
 			} else {
 				ret = -EAGAIN;
 			}
@@ -4801,6 +4900,144 @@ out:
 	return ret;
 }
 
+struct btrfs_ino_list {
+	u64 ino;
+	u64 parent;
+	struct list_head list;
+};
+
+static int log_conflicting_inodes(struct btrfs_trans_handle *trans,
+				  struct btrfs_root *root,
+				  struct btrfs_path *path,
+				  struct btrfs_log_ctx *ctx,
+				  u64 ino, u64 parent)
+{
+	struct btrfs_ino_list *ino_elem;
+	LIST_HEAD(inode_list);
+	int ret = 0;
+
+	ino_elem = kmalloc(sizeof(*ino_elem), GFP_NOFS);
+	if (!ino_elem)
+		return -ENOMEM;
+	ino_elem->ino = ino;
+	ino_elem->parent = parent;
+	list_add_tail(&ino_elem->list, &inode_list);
+
+	while (!list_empty(&inode_list)) {
+		struct btrfs_fs_info *fs_info = root->fs_info;
+		struct btrfs_key key;
+		struct inode *inode;
+
+		ino_elem = list_first_entry(&inode_list, struct btrfs_ino_list,
+					    list);
+		ino = ino_elem->ino;
+		parent = ino_elem->parent;
+		list_del(&ino_elem->list);
+		kfree(ino_elem);
+		if (ret)
+			continue;
+
+		btrfs_release_path(path);
+
+		key.objectid = ino;
+		key.type = BTRFS_INODE_ITEM_KEY;
+		key.offset = 0;
+		inode = btrfs_iget(fs_info->sb, &key, root, NULL);
+		/*
+		 * If the other inode that had a conflicting dir entry was
+		 * deleted in the current transaction, we need to log its parent
+		 * directory.
+		 */
+		if (IS_ERR(inode)) {
+			ret = PTR_ERR(inode);
+			if (ret == -ENOENT) {
+				key.objectid = parent;
+				inode = btrfs_iget(fs_info->sb, &key, root,
+						   NULL);
+				if (IS_ERR(inode)) {
+					ret = PTR_ERR(inode);
+				} else {
+					ret = btrfs_log_inode(trans, root,
+						      BTRFS_I(inode),
+						      LOG_OTHER_INODE_ALL,
+						      0, LLONG_MAX, ctx);
+					iput(inode);
+				}
+			}
+			continue;
+		}
+		/*
+		 * We are safe logging the other inode without acquiring its
+		 * lock as long as we log with the LOG_INODE_EXISTS mode. We
+		 * are safe against concurrent renames of the other inode as
+		 * well because during a rename we pin the log and update the
+		 * log with the new name before we unpin it.
+		 */
+		ret = btrfs_log_inode(trans, root, BTRFS_I(inode),
+				      LOG_OTHER_INODE, 0, LLONG_MAX, ctx);
+		if (ret) {
+			iput(inode);
+			continue;
+		}
+
+		key.objectid = ino;
+		key.type = BTRFS_INODE_REF_KEY;
+		key.offset = 0;
+		ret = btrfs_search_slot(NULL, root, &key, path, 0, 0);
+		if (ret < 0) {
+			iput(inode);
+			continue;
+		}
+
+		while (true) {
+			struct extent_buffer *leaf = path->nodes[0];
+			int slot = path->slots[0];
+			u64 other_ino = 0;
+			u64 other_parent = 0;
+
+			if (slot >= btrfs_header_nritems(leaf)) {
+				ret = btrfs_next_leaf(root, path);
+				if (ret < 0) {
+					break;
+				} else if (ret > 0) {
+					ret = 0;
+					break;
+				}
+				continue;
+			}
+
+			btrfs_item_key_to_cpu(leaf, &key, slot);
+			if (key.objectid != ino ||
+			    (key.type != BTRFS_INODE_REF_KEY &&
+			     key.type != BTRFS_INODE_EXTREF_KEY)) {
+				ret = 0;
+				break;
+			}
+
+			ret = btrfs_check_ref_name_override(leaf, slot, &key,
+					BTRFS_I(inode), &other_ino,
+					&other_parent);
+			if (ret < 0)
+				break;
+			if (ret > 0) {
+				ino_elem = kmalloc(sizeof(*ino_elem), GFP_NOFS);
+				if (!ino_elem) {
+					ret = -ENOMEM;
+					break;
+				}
+				ino_elem->ino = other_ino;
+				ino_elem->parent = other_parent;
+				list_add_tail(&ino_elem->list, &inode_list);
+				ret = 0;
+			}
+			path->slots[0]++;
+		}
+		iput(inode);
+	}
+
+	return ret;
+}
+
 /* log a single inode in the tree log.
  * At least one parent directory for this inode must exist in the tree
  * or be logged already.
@@ -4840,6 +5077,7 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
 	u64 logged_isize = 0;
 	bool need_log_inode_item = true;
 	bool xattrs_logged = false;
+	bool recursive_logging = false;
 
 	path = btrfs_alloc_path();
 	if (!path)
@@ -4885,8 +5123,12 @@ static int btrfs_log_inode(struct btrfs_trans_handle *trans,
 		return ret;
 	}
 
-	if (inode_only == LOG_OTHER_INODE) {
-		inode_only = LOG_INODE_EXISTS;
+	if (inode_only == LOG_OTHER_INODE || inode_only == LOG_OTHER_INODE_ALL) {
+		recursive_logging = true;
+		if (inode_only == LOG_OTHER_INODE)
+			inode_only = LOG_INODE_EXISTS;
+		else
+			inode_only = LOG_INODE_ALL;
 		mutex_lock_nested(&inode->log_mutex, SINGLE_DEPTH_NESTING);
 	} else {
 		mutex_lock(&inode->log_mutex);
@@ -4981,20 +5223,19 @@ again:
 
 		if ((min_key.type == BTRFS_INODE_REF_KEY ||
 		     min_key.type == BTRFS_INODE_EXTREF_KEY) &&
-		    inode->generation == trans->transid) {
+		    inode->generation == trans->transid &&
+		    !recursive_logging) {
 			u64 other_ino = 0;
+			u64 other_parent = 0;
 
 			ret = btrfs_check_ref_name_override(path->nodes[0],
 					path->slots[0], &min_key, inode,
-					&other_ino);
+					&other_ino, &other_parent);
 			if (ret < 0) {
 				err = ret;
 				goto out_unlock;
 			} else if (ret > 0 && ctx &&
 				   other_ino != btrfs_ino(BTRFS_I(ctx->inode))) {
-				struct btrfs_key inode_key;
-				struct inode *other_inode;
-
 				if (ins_nr > 0) {
 					ins_nr++;
 				} else {
@@ -5010,43 +5251,13 @@ again:
 					goto out_unlock;
 				}
 				ins_nr = 0;
-				btrfs_release_path(path);
-				inode_key.objectid = other_ino;
-				inode_key.type = BTRFS_INODE_ITEM_KEY;
-				inode_key.offset = 0;
-				other_inode = btrfs_iget(fs_info->sb,
-							 &inode_key, root,
-							 NULL);
-				/*
-				 * If the other inode that had a conflicting dir
-				 * entry was deleted in the current transaction,
-				 * we don't need to do more work nor fallback to
-				 * a transaction commit.
-				 */
-				if (other_inode == ERR_PTR(-ENOENT)) {
-					goto next_key;
-				} else if (IS_ERR(other_inode)) {
-					err = PTR_ERR(other_inode);
-					goto out_unlock;
-				}
-				/*
-				 * We are safe logging the other inode without
-				 * acquiring its i_mutex as long as we log with
-				 * the LOG_INODE_EXISTS mode. We're safe against
-				 * concurrent renames of the other inode as well
-				 * because during a rename we pin the log and
-				 * update the log with the new name before we
-				 * unpin it.
-				 */
-				err = btrfs_log_inode(trans, root,
-						BTRFS_I(other_inode),
-						LOG_OTHER_INODE, 0, LLONG_MAX,
-						ctx);
-				iput(other_inode);
+
+				err = log_conflicting_inodes(trans, root, path,
+						ctx, other_ino, other_parent);
 				if (err)
 					goto out_unlock;
-				else
-					goto next_key;
+				btrfs_release_path(path);
+				goto next_key;
 			}
 		}
 
@@ -5249,7 +5460,7 @@ static bool btrfs_must_commit_transaction(struct btrfs_trans_handle *trans,
 		 * Make sure any commits to the log are forced to be full
 		 * commits.
 		 */
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 		ret = true;
 	}
 	mutex_unlock(&inode->log_mutex);
@@ -5271,7 +5482,6 @@ static noinline int check_parent_dirs_for_sync(struct btrfs_trans_handle *trans,
 {
 	int ret = 0;
 	struct dentry *old_parent = NULL;
-	struct btrfs_inode *orig_inode = inode;
 
 	/*
 	 * for regular files, if its inode is already on disk, we don't
@@ -5291,16 +5501,6 @@ static noinline int check_parent_dirs_for_sync(struct btrfs_trans_handle *trans,
 	}
 
 	while (1) {
-		/*
-		 * If we are logging a directory then we start with our inode,
-		 * not our parent's inode, so we need to skip setting the
-		 * logged_trans so that further down in the log code we don't
-		 * think this inode has already been logged.
-		 */
-		if (inode != orig_inode)
-			inode->logged_trans = trans->transid;
-		smp_mb();
-
 		if (btrfs_must_commit_transaction(trans, inode)) {
 			ret = 1;
 			break;
@@ -5626,6 +5826,190 @@ out:
 	return ret;
 }
 
+static int log_new_ancestors(struct btrfs_trans_handle *trans,
+			     struct btrfs_root *root,
+			     struct btrfs_path *path,
+			     struct btrfs_log_ctx *ctx)
+{
+	struct btrfs_key found_key;
+
+	btrfs_item_key_to_cpu(path->nodes[0], &found_key, path->slots[0]);
+
+	while (true) {
+		struct btrfs_fs_info *fs_info = root->fs_info;
+		const u64 last_committed = fs_info->last_trans_committed;
+		struct extent_buffer *leaf = path->nodes[0];
+		int slot = path->slots[0];
+		struct btrfs_key search_key;
+		struct inode *inode;
+		int ret = 0;
+
+		btrfs_release_path(path);
+
+		search_key.objectid = found_key.offset;
+		search_key.type = BTRFS_INODE_ITEM_KEY;
+		search_key.offset = 0;
+		inode = btrfs_iget(fs_info->sb, &search_key, root, NULL);
+		if (IS_ERR(inode))
+			return PTR_ERR(inode);
+
+		if (BTRFS_I(inode)->generation > last_committed)
+			ret = btrfs_log_inode(trans, root, BTRFS_I(inode),
+					      LOG_INODE_EXISTS,
+					      0, LLONG_MAX, ctx);
+		iput(inode);
+		if (ret)
+			return ret;
+
+		if (search_key.objectid == BTRFS_FIRST_FREE_OBJECTID)
+			break;
+
+		search_key.type = BTRFS_INODE_REF_KEY;
+		ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0);
+		if (ret < 0)
+			return ret;
+
+		leaf = path->nodes[0];
+		slot = path->slots[0];
+		if (slot >= btrfs_header_nritems(leaf)) {
+			ret = btrfs_next_leaf(root, path);
+			if (ret < 0)
+				return ret;
+			else if (ret > 0)
+				return -ENOENT;
+			leaf = path->nodes[0];
+			slot = path->slots[0];
+		}
+
+		btrfs_item_key_to_cpu(leaf, &found_key, slot);
+		if (found_key.objectid != search_key.objectid ||
+		    found_key.type != BTRFS_INODE_REF_KEY)
+			return -ENOENT;
+	}
+	return 0;
+}
+
+static int log_new_ancestors_fast(struct btrfs_trans_handle *trans,
+				  struct btrfs_inode *inode,
+				  struct dentry *parent,
+				  struct btrfs_log_ctx *ctx)
+{
+	struct btrfs_root *root = inode->root;
+	struct btrfs_fs_info *fs_info = root->fs_info;
+	struct dentry *old_parent = NULL;
+	struct super_block *sb = inode->vfs_inode.i_sb;
+	int ret = 0;
+
+	while (true) {
+		if (!parent || d_really_is_negative(parent) ||
+		    sb != parent->d_sb)
+			break;
+
+		inode = BTRFS_I(d_inode(parent));
+		if (root != inode->root)
+			break;
+
+		if (inode->generation > fs_info->last_trans_committed) {
+			ret = btrfs_log_inode(trans, root, inode,
+					LOG_INODE_EXISTS, 0, LLONG_MAX, ctx);
+			if (ret)
+				break;
+		}
+		if (IS_ROOT(parent))
+			break;
+
+		parent = dget_parent(parent);
+		dput(old_parent);
+		old_parent = parent;
+	}
+	dput(old_parent);
+
+	return ret;
+}
+
+static int log_all_new_ancestors(struct btrfs_trans_handle *trans,
+				 struct btrfs_inode *inode,
+				 struct dentry *parent,
+				 struct btrfs_log_ctx *ctx)
+{
+	struct btrfs_root *root = inode->root;
+	const u64 ino = btrfs_ino(inode);
+	struct btrfs_path *path;
+	struct btrfs_key search_key;
+	int ret;
+
+	/*
+	 * For a single hard link case, go through a fast path that does not
+	 * need to iterate the fs/subvolume tree.
+	 */
+	if (inode->vfs_inode.i_nlink < 2)
+		return log_new_ancestors_fast(trans, inode, parent, ctx);
+
+	path = btrfs_alloc_path();
+	if (!path)
+		return -ENOMEM;
+
+	search_key.objectid = ino;
+	search_key.type = BTRFS_INODE_REF_KEY;
+	search_key.offset = 0;
+again:
+	ret = btrfs_search_slot(NULL, root, &search_key, path, 0, 0);
+	if (ret < 0)
+		goto out;
+	if (ret == 0)
+		path->slots[0]++;
+
+	while (true) {
+		struct extent_buffer *leaf = path->nodes[0];
+		int slot = path->slots[0];
+		struct btrfs_key found_key;
+
+		if (slot >= btrfs_header_nritems(leaf)) {
+			ret = btrfs_next_leaf(root, path);
+			if (ret < 0)
+				goto out;
+			else if (ret > 0)
+				break;
+			continue;
+		}
+
+		btrfs_item_key_to_cpu(leaf, &found_key, slot);
+		if (found_key.objectid != ino ||
+		    found_key.type > BTRFS_INODE_EXTREF_KEY)
+			break;
+
+		/*
+		 * Don't deal with extended references because they are rare
+		 * cases and too complex to deal with (we would need to keep
+		 * track of which subitem we are processing for each item in
+		 * this loop, etc). So just return some error to fallback to
+		 * a transaction commit.
+		 */
+		if (found_key.type == BTRFS_INODE_EXTREF_KEY) {
+			ret = -EMLINK;
+			goto out;
+		}
+
+		/*
+		 * Logging ancestors needs to do more searches on the fs/subvol
+		 * tree, so it releases the path as needed to avoid deadlocks.
+		 * Keep track of the last inode ref key and resume from that key
+		 * after logging all new ancestors for the current hard link.
+		 */
+		memcpy(&search_key, &found_key, sizeof(search_key));
+
+		ret = log_new_ancestors(trans, root, path, ctx);
+		if (ret)
+			goto out;
+		btrfs_release_path(path);
+		goto again;
+	}
+	ret = 0;
+out:
+	btrfs_free_path(path);
+	return ret;
+}
+
 /*
  * helper function around btrfs_log_inode to make sure newly created
  * parent directories also end up in the log.  A minimal inode and backref
@@ -5643,11 +6027,9 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
 	struct btrfs_root *root = inode->root;
 	struct btrfs_fs_info *fs_info = root->fs_info;
 	struct super_block *sb;
-	struct dentry *old_parent = NULL;
 	int ret = 0;
 	u64 last_committed = fs_info->last_trans_committed;
 	bool log_dentries = false;
-	struct btrfs_inode *orig_inode = inode;
 
 	sb = inode->vfs_inode.i_sb;
 
@@ -5753,56 +6135,22 @@ static int btrfs_log_inode_parent(struct btrfs_trans_handle *trans,
 	 * and has a link count of 2.
 	 */
 	if (inode->last_unlink_trans > last_committed) {
-		ret = btrfs_log_all_parents(trans, orig_inode, ctx);
+		ret = btrfs_log_all_parents(trans, inode, ctx);
 		if (ret)
 			goto end_trans;
 	}
 
-	/*
-	 * If a new hard link was added to the inode in the current transaction
-	 * and its link count is now greater than 1, we need to fallback to a
-	 * transaction commit, otherwise we can end up not logging all its new
-	 * parents for all the hard links. Here just from the dentry used to
-	 * fsync, we can not visit the ancestor inodes for all the other hard
-	 * links to figure out if any is new, so we fallback to a transaction
-	 * commit (instead of adding a lot of complexity of scanning a btree,
-	 * since this scenario is not a common use case).
-	 */
-	if (inode->vfs_inode.i_nlink > 1 &&
-	    inode->last_link_trans > last_committed) {
-		ret = -EMLINK;
+	ret = log_all_new_ancestors(trans, inode, parent, ctx);
+	if (ret)
 		goto end_trans;
-	}
-
-	while (1) {
-		if (!parent || d_really_is_negative(parent) || sb != parent->d_sb)
-			break;
-
-		inode = BTRFS_I(d_inode(parent));
-		if (root != inode->root)
-			break;
-
-		if (inode->generation > last_committed) {
-			ret = btrfs_log_inode(trans, root, inode,
-					LOG_INODE_EXISTS, 0, LLONG_MAX, ctx);
-			if (ret)
-				goto end_trans;
-		}
-		if (IS_ROOT(parent))
-			break;
 
-		parent = dget_parent(parent);
-		dput(old_parent);
-		old_parent = parent;
-	}
 	if (log_dentries)
-		ret = log_new_dir_dentries(trans, root, orig_inode, ctx);
+		ret = log_new_dir_dentries(trans, root, inode, ctx);
 	else
 		ret = 0;
 end_trans:
-	dput(old_parent);
 	if (ret < 0) {
-		btrfs_set_log_full_commit(fs_info, trans);
+		btrfs_set_log_full_commit(trans);
 		ret = 1;
 	}
 
@@ -6029,7 +6377,6 @@ void btrfs_record_unlink_dir(struct btrfs_trans_handle *trans,
 	 * if this directory was already logged any new
 	 * names for this file/dir will get recorded
 	 */
-	smp_mb();
 	if (dir->logged_trans == trans->transid)
 		return;
 
diff --git a/fs/btrfs/tree-log.h b/fs/btrfs/tree-log.h
index 0fab84a8f670..132e43d29034 100644
--- a/fs/btrfs/tree-log.h
+++ b/fs/btrfs/tree-log.h
@@ -30,16 +30,14 @@ static inline void btrfs_init_log_ctx(struct btrfs_log_ctx *ctx,
 	INIT_LIST_HEAD(&ctx->list);
 }
 
-static inline void btrfs_set_log_full_commit(struct btrfs_fs_info *fs_info,
-					     struct btrfs_trans_handle *trans)
+static inline void btrfs_set_log_full_commit(struct btrfs_trans_handle *trans)
 {
-	WRITE_ONCE(fs_info->last_trans_log_full_commit, trans->transid);
+	WRITE_ONCE(trans->fs_info->last_trans_log_full_commit, trans->transid);
 }
 
-static inline int btrfs_need_log_full_commit(struct btrfs_fs_info *fs_info,
-					     struct btrfs_trans_handle *trans)
+static inline int btrfs_need_log_full_commit(struct btrfs_trans_handle *trans)
 {
-	return READ_ONCE(fs_info->last_trans_log_full_commit) ==
+	return READ_ONCE(trans->fs_info->last_trans_log_full_commit) ==
 		trans->transid;
 }
 
diff --git a/fs/btrfs/uuid-tree.c b/fs/btrfs/uuid-tree.c
index 3b2ae342e649..91caab63bdf5 100644
--- a/fs/btrfs/uuid-tree.c
+++ b/fs/btrfs/uuid-tree.c
@@ -121,12 +121,12 @@ int btrfs_uuid_tree_add(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
 		 * An item with that type already exists.
 		 * Extend the item and store the new subid at the end.
 		 */
-		btrfs_extend_item(fs_info, path, sizeof(subid_le));
+		btrfs_extend_item(path, sizeof(subid_le));
 		eb = path->nodes[0];
 		slot = path->slots[0];
 		offset = btrfs_item_ptr_offset(eb, slot);
 		offset += btrfs_item_size_nr(eb, slot) - sizeof(subid_le);
-	} else if (ret < 0) {
+	} else {
 		btrfs_warn(fs_info,
 			   "insert uuid item failed %d (0x%016llx, 0x%016llx) type %u!",
 			   ret, (unsigned long long)key.objectid,
@@ -219,7 +219,7 @@ int btrfs_uuid_tree_remove(struct btrfs_trans_handle *trans, u8 *uuid, u8 type,
 	move_src = offset + sizeof(subid);
 	move_len = item_size - (move_src - btrfs_item_ptr_offset(eb, slot));
 	memmove_extent_buffer(eb, move_dst, move_src, move_len);
-	btrfs_truncate_item(fs_info, path, item_size - sizeof(subid), 1);
+	btrfs_truncate_item(path, item_size - sizeof(subid), 1);
 
 out:
 	btrfs_free_path(path);
diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index 15561926ab32..1c2a6e4b39da 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -27,6 +27,7 @@
 #include "math.h"
 #include "dev-replace.h"
 #include "sysfs.h"
+#include "tree-checker.h"
 
 const struct btrfs_raid_attr btrfs_raid_array[BTRFS_NR_RAID_TYPES] = {
 	[BTRFS_RAID_RAID10] = {
@@ -184,8 +185,7 @@ void btrfs_describe_block_groups(u64 bg_flags, char *buf, u32 size_buf)
 out_overflow:;
 }
 
-static int init_first_rw_device(struct btrfs_trans_handle *trans,
-				struct btrfs_fs_info *fs_info);
+static int init_first_rw_device(struct btrfs_trans_handle *trans);
 static int btrfs_relocate_sys_chunks(struct btrfs_fs_info *fs_info);
 static void __btrfs_reset_dev_stats(struct btrfs_device *dev);
 static void btrfs_dev_stat_print_on_error(struct btrfs_device *dev);
@@ -318,7 +318,6 @@ static struct btrfs_fs_devices *alloc_fs_devices(const u8 *fsid,
 	mutex_init(&fs_devs->device_list_mutex);
 
 	INIT_LIST_HEAD(&fs_devs->devices);
-	INIT_LIST_HEAD(&fs_devs->resized_devices);
 	INIT_LIST_HEAD(&fs_devs->alloc_list);
 	INIT_LIST_HEAD(&fs_devs->fs_list);
 	if (fsid)
@@ -334,7 +333,9 @@ static struct btrfs_fs_devices *alloc_fs_devices(const u8 *fsid,
 
 void btrfs_free_device(struct btrfs_device *device)
 {
+	WARN_ON(!list_empty(&device->post_commit_list));
 	rcu_string_free(device->name);
+	extent_io_tree_release(&device->alloc_state);
 	bio_put(device->flush_bio);
 	kfree(device);
 }
@@ -402,7 +403,7 @@ static struct btrfs_device *__alloc_device(void)
 
 	INIT_LIST_HEAD(&dev->dev_list);
 	INIT_LIST_HEAD(&dev->dev_alloc_list);
-	INIT_LIST_HEAD(&dev->resized_list);
+	INIT_LIST_HEAD(&dev->post_commit_list);
 
 	spin_lock_init(&dev->io_lock);
 
@@ -411,31 +412,11 @@ static struct btrfs_device *__alloc_device(void)
 	btrfs_device_data_ordered_init(dev);
 	INIT_RADIX_TREE(&dev->reada_zones, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
 	INIT_RADIX_TREE(&dev->reada_extents, GFP_NOFS & ~__GFP_DIRECT_RECLAIM);
+	extent_io_tree_init(NULL, &dev->alloc_state, 0, NULL);
 
 	return dev;
 }
 
-/*
- * Find a device specified by @devid or @uuid in the list of @fs_devices, or
- * return NULL.
- *
- * If devid and uuid are both specified, the match must be exact, otherwise
- * only devid is used.
- */
-static struct btrfs_device *find_device(struct btrfs_fs_devices *fs_devices,
-		u64 devid, const u8 *uuid)
-{
-	struct btrfs_device *dev;
-
-	list_for_each_entry(dev, &fs_devices->devices, dev_list) {
-		if (dev->devid == devid &&
-		    (!uuid || !memcmp(dev->uuid, uuid, BTRFS_UUID_SIZE))) {
-			return dev;
-		}
-	}
-	return NULL;
-}
-
 static noinline struct btrfs_fs_devices *find_fsid(
 		const u8 *fsid, const u8 *metadata_fsid)
 {
@@ -734,6 +715,17 @@ static void pending_bios_fn(struct btrfs_work *work)
 	run_scheduled_bios(device);
 }
 
+static bool device_path_matched(const char *path, struct btrfs_device *device)
+{
+	int found;
+
+	rcu_read_lock();
+	found = strcmp(rcu_str_deref(device->name), path);
+	rcu_read_unlock();
+
+	return found == 0;
+}
+
 /*
  *  Search and remove all stale (devices which are not mounted) devices.
  *  When both inputs are NULL, it will search and release all stale devices.
@@ -741,52 +733,57 @@ static void pending_bios_fn(struct btrfs_work *work)
  *		matching this path only.
  *  skip_dev:	Optional. Will skip this device when searching for the stale
  *		devices.
+ *  Return:	0 for success or if @path is NULL.
+ * 		-EBUSY if @path is a mounted device.
+ * 		-ENOENT if @path does not match any device in the list.
  */
-static void btrfs_free_stale_devices(const char *path,
+static int btrfs_free_stale_devices(const char *path,
 				     struct btrfs_device *skip_device)
 {
 	struct btrfs_fs_devices *fs_devices, *tmp_fs_devices;
 	struct btrfs_device *device, *tmp_device;
+	int ret = 0;
+
+	if (path)
+		ret = -ENOENT;
 
 	list_for_each_entry_safe(fs_devices, tmp_fs_devices, &fs_uuids, fs_list) {
-		mutex_lock(&fs_devices->device_list_mutex);
-		if (fs_devices->opened) {
-			mutex_unlock(&fs_devices->device_list_mutex);
-			continue;
-		}
 
+		mutex_lock(&fs_devices->device_list_mutex);
 		list_for_each_entry_safe(device, tmp_device,
 					 &fs_devices->devices, dev_list) {
-			int not_found = 0;
-
 			if (skip_device && skip_device == device)
 				continue;
 			if (path && !device->name)
 				continue;
-
-			rcu_read_lock();
-			if (path)
-				not_found = strcmp(rcu_str_deref(device->name),
-						   path);
-			rcu_read_unlock();
-			if (not_found)
+			if (path && !device_path_matched(path, device))
 				continue;
+			if (fs_devices->opened) {
+				/* for an already deleted device return 0 */
+				if (path && ret != 0)
+					ret = -EBUSY;
+				break;
+			}
 
 			/* delete the stale device */
 			fs_devices->num_devices--;
 			list_del(&device->dev_list);
 			btrfs_free_device(device);
 
+			ret = 0;
 			if (fs_devices->num_devices == 0)
 				break;
 		}
 		mutex_unlock(&fs_devices->device_list_mutex);
+
 		if (fs_devices->num_devices == 0) {
 			btrfs_sysfs_remove_fsid(fs_devices);
 			list_del(&fs_devices->fs_list);
 			free_fs_devices(fs_devices);
 		}
 	}
+
+	return ret;
 }
 
 static int btrfs_open_one_device(struct btrfs_fs_devices *fs_devices,
@@ -968,8 +965,8 @@ static noinline struct btrfs_device *device_list_add(const char *path,
 		device = NULL;
 	} else {
 		mutex_lock(&fs_devices->device_list_mutex);
-		device = find_device(fs_devices, devid,
-				disk_super->dev_item.uuid);
+		device = btrfs_find_device(fs_devices, devid,
+				disk_super->dev_item.uuid, NULL, false);
 
 		/*
 		 * If this disk has been pulled into an fs devices created by
@@ -1134,7 +1131,6 @@ static struct btrfs_fs_devices *clone_fs_devices(struct btrfs_fs_devices *orig)
 	mutex_lock(&orig->device_list_mutex);
 	fs_devices->total_devices = orig->total_devices;
 
-	/* We have held the volume lock, it is safe to get the devices. */
 	list_for_each_entry(orig_dev, &orig->devices, dev_list) {
 		struct rcu_string *name;
 
@@ -1236,14 +1232,6 @@ again:
 	mutex_unlock(&uuid_mutex);
 }
 
-static void free_device_rcu(struct rcu_head *head)
-{
-	struct btrfs_device *device;
-
-	device = container_of(head, struct btrfs_device, rcu);
-	btrfs_free_device(device);
-}
-
 static void btrfs_close_bdev(struct btrfs_device *device)
 {
 	if (!device->bdev)
@@ -1291,7 +1279,8 @@ static void btrfs_close_one_device(struct btrfs_device *device)
 	list_replace_rcu(&device->dev_list, &new_device->dev_list);
 	new_device->fs_devices = device->fs_devices;
 
-	call_rcu(&device->rcu, free_device_rcu);
+	synchronize_rcu();
+	btrfs_free_device(device);
 }
 
 static int close_fs_devices(struct btrfs_fs_devices *fs_devices)
@@ -1451,6 +1440,17 @@ static int btrfs_read_disk_super(struct block_device *bdev, u64 bytenr,
 	return 0;
 }
 
+int btrfs_forget_devices(const char *path)
+{
+	int ret;
+
+	mutex_lock(&uuid_mutex);
+	ret = btrfs_free_stale_devices(strlen(path) ? path : NULL, NULL);
+	mutex_unlock(&uuid_mutex);
+
+	return ret;
+}
+
 /*
  * Look for a btrfs signature on a device. This may be called out of the mount path
  * and we are not allowed to call set_blocksize during the scan. The superblock
@@ -1500,58 +1500,29 @@ error_bdev_put:
 	return device;
 }
 
-static int contains_pending_extent(struct btrfs_transaction *transaction,
-				   struct btrfs_device *device,
-				   u64 *start, u64 len)
+/*
+ * Try to find a chunk that intersects [start, start + len] range and when one
+ * such is found, record the end of it in *start
+ */
+static bool contains_pending_extent(struct btrfs_device *device, u64 *start,
+				    u64 len)
 {
-	struct btrfs_fs_info *fs_info = device->fs_info;
-	struct extent_map *em;
-	struct list_head *search_list = &fs_info->pinned_chunks;
-	int ret = 0;
-	u64 physical_start = *start;
+	u64 physical_start, physical_end;
 
-	if (transaction)
-		search_list = &transaction->pending_chunks;
-again:
-	list_for_each_entry(em, search_list, list) {
-		struct map_lookup *map;
-		int i;
+	lockdep_assert_held(&device->fs_info->chunk_mutex);
 
-		map = em->map_lookup;
-		for (i = 0; i < map->num_stripes; i++) {
-			u64 end;
+	if (!find_first_extent_bit(&device->alloc_state, *start,
+				   &physical_start, &physical_end,
+				   CHUNK_ALLOCATED, NULL)) {
 
-			if (map->stripes[i].dev != device)
-				continue;
-			if (map->stripes[i].physical >= physical_start + len ||
-			    map->stripes[i].physical + em->orig_block_len <=
-			    physical_start)
-				continue;
-			/*
-			 * Make sure that while processing the pinned list we do
-			 * not override our *start with a lower value, because
-			 * we can have pinned chunks that fall within this
-			 * device hole and that have lower physical addresses
-			 * than the pending chunks we processed before. If we
-			 * do not take this special care we can end up getting
-			 * 2 pending chunks that start at the same physical
-			 * device offsets because the end offset of a pinned
-			 * chunk can be equal to the start offset of some
-			 * pending chunk.
-			 */
-			end = map->stripes[i].physical + em->orig_block_len;
-			if (end > *start) {
-				*start = end;
-				ret = 1;
-			}
+		if (in_range(physical_start, *start, len) ||
+		    in_range(*start, physical_start,
+			     physical_end - physical_start)) {
+			*start = physical_end + 1;
+			return true;
 		}
 	}
-	if (search_list != &fs_info->pinned_chunks) {
-		search_list = &fs_info->pinned_chunks;
-		goto again;
-	}
-
-	return ret;
+	return false;
 }
 
 
@@ -1576,8 +1547,7 @@ again:
  * But if we don't find suitable free space, it is used to store the size of
  * the max free space.
  */
-int find_free_dev_extent_start(struct btrfs_transaction *transaction,
-			       struct btrfs_device *device, u64 num_bytes,
+int find_free_dev_extent_start(struct btrfs_device *device, u64 num_bytes,
 			       u64 search_start, u64 *start, u64 *len)
 {
 	struct btrfs_fs_info *fs_info = device->fs_info;
@@ -1662,15 +1632,12 @@ again:
 			 * Have to check before we set max_hole_start, otherwise
 			 * we could end up sending back this offset anyway.
 			 */
-			if (contains_pending_extent(transaction, device,
-						    &search_start,
+			if (contains_pending_extent(device, &search_start,
 						    hole_size)) {
-				if (key.offset >= search_start) {
+				if (key.offset >= search_start)
 					hole_size = key.offset - search_start;
-				} else {
-					WARN_ON_ONCE(1);
+				else
 					hole_size = 0;
-				}
 			}
 
 			if (hole_size > max_hole_size) {
@@ -1711,8 +1678,7 @@ next:
 	if (search_end > search_start) {
 		hole_size = search_end - search_start;
 
-		if (contains_pending_extent(transaction, device, &search_start,
-					    hole_size)) {
+		if (contains_pending_extent(device, &search_start, hole_size)) {
 			btrfs_release_path(path);
 			goto again;
 		}
@@ -1737,13 +1703,11 @@ out:
 	return ret;
 }
 
-int find_free_dev_extent(struct btrfs_trans_handle *trans,
-			 struct btrfs_device *device, u64 num_bytes,
+int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
 			 u64 *start, u64 *len)
 {
 	/* FIXME use last free of some kind */
-	return find_free_dev_extent_start(trans->transaction, device,
-					  num_bytes, 0, start, len);
+	return find_free_dev_extent_start(device, num_bytes, 0, start, len);
 }
 
 static int btrfs_free_dev_extent(struct btrfs_trans_handle *trans,
@@ -1977,10 +1941,9 @@ static void update_dev_time(const char *path_name)
 	filp_close(filp, NULL);
 }
 
-static int btrfs_rm_dev_item(struct btrfs_fs_info *fs_info,
-			     struct btrfs_device *device)
+static int btrfs_rm_dev_item(struct btrfs_device *device)
 {
-	struct btrfs_root *root = fs_info->chunk_root;
+	struct btrfs_root *root = device->fs_info->chunk_root;
 	int ret;
 	struct btrfs_path *path;
 	struct btrfs_key key;
@@ -2181,12 +2144,12 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
 	 * counter although write_all_supers() is not locked out. This
 	 * could give a filesystem state which requires a degraded mount.
 	 */
-	ret = btrfs_rm_dev_item(fs_info, device);
+	ret = btrfs_rm_dev_item(device);
 	if (ret)
 		goto error_undo;
 
 	clear_bit(BTRFS_DEV_STATE_IN_FS_METADATA, &device->dev_state);
-	btrfs_scrub_cancel_dev(fs_info, device);
+	btrfs_scrub_cancel_dev(device);
 
 	/*
 	 * the device list mutex makes sure that we don't change
@@ -2237,7 +2200,8 @@ int btrfs_rm_device(struct btrfs_fs_info *fs_info, const char *device_path,
 		btrfs_scratch_superblocks(device->bdev, device->name->str);
 
 	btrfs_close_bdev(device);
-	call_rcu(&device->rcu, free_device_rcu);
+	synchronize_rcu();
+	btrfs_free_device(device);
 
 	if (cur_devices->open_devices == 0) {
 		while (fs_devices) {
@@ -2294,9 +2258,9 @@ void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev)
 		fs_devices->open_devices--;
 }
 
-void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
-				      struct btrfs_device *srcdev)
+void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev)
 {
+	struct btrfs_fs_info *fs_info = srcdev->fs_info;
 	struct btrfs_fs_devices *fs_devices = srcdev->fs_devices;
 
 	if (test_bit(BTRFS_DEV_STATE_WRITEABLE, &srcdev->dev_state)) {
@@ -2305,7 +2269,8 @@ void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
 	}
 
 	btrfs_close_bdev(srcdev);
-	call_rcu(&srcdev->rcu, free_device_rcu);
+	synchronize_rcu();
+	btrfs_free_device(srcdev);
 
 	/* if this is no devs we rather delete the fs_devices */
 	if (!fs_devices->num_devices) {
@@ -2363,7 +2328,8 @@ void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev)
 	btrfs_scratch_superblocks(tgtdev->bdev, tgtdev->name->str);
 
 	btrfs_close_bdev(tgtdev);
-	call_rcu(&tgtdev->rcu, free_device_rcu);
+	synchronize_rcu();
+	btrfs_free_device(tgtdev);
 }
 
 static struct btrfs_device *btrfs_find_device_by_path(
@@ -2385,11 +2351,11 @@ static struct btrfs_device *btrfs_find_device_by_path(
 	devid = btrfs_stack_device_id(&disk_super->dev_item);
 	dev_uuid = disk_super->dev_item.uuid;
 	if (btrfs_fs_incompat(fs_info, METADATA_UUID))
-		device = btrfs_find_device(fs_info, devid, dev_uuid,
-				disk_super->metadata_uuid);
+		device = btrfs_find_device(fs_info->fs_devices, devid, dev_uuid,
+					   disk_super->metadata_uuid, true);
 	else
-		device = btrfs_find_device(fs_info, devid,
-				dev_uuid, disk_super->fsid);
+		device = btrfs_find_device(fs_info->fs_devices, devid, dev_uuid,
+					   disk_super->fsid, true);
 
 	brelse(bh);
 	if (!device)
@@ -2398,50 +2364,38 @@ static struct btrfs_device *btrfs_find_device_by_path(
 	return device;
 }
 
-static struct btrfs_device *btrfs_find_device_missing_or_by_path(
-		struct btrfs_fs_info *fs_info, const char *device_path)
-{
-	struct btrfs_device *device = NULL;
-	if (strcmp(device_path, "missing") == 0) {
-		struct list_head *devices;
-		struct btrfs_device *tmp;
-
-		devices = &fs_info->fs_devices->devices;
-		list_for_each_entry(tmp, devices, dev_list) {
-			if (test_bit(BTRFS_DEV_STATE_IN_FS_METADATA,
-					&tmp->dev_state) && !tmp->bdev) {
-				device = tmp;
-				break;
-			}
-		}
-
-		if (!device)
-			return ERR_PTR(-ENOENT);
-	} else {
-		device = btrfs_find_device_by_path(fs_info, device_path);
-	}
-
-	return device;
-}
-
 /*
  * Lookup a device given by device id, or the path if the id is 0.
  */
 struct btrfs_device *btrfs_find_device_by_devspec(
-		struct btrfs_fs_info *fs_info, u64 devid, const char *devpath)
+		struct btrfs_fs_info *fs_info, u64 devid,
+		const char *device_path)
 {
 	struct btrfs_device *device;
 
 	if (devid) {
-		device = btrfs_find_device(fs_info, devid, NULL, NULL);
+		device = btrfs_find_device(fs_info->fs_devices, devid, NULL,
+					   NULL, true);
 		if (!device)
 			return ERR_PTR(-ENOENT);
-	} else {
-		if (!devpath || !devpath[0])
-			return ERR_PTR(-EINVAL);
-		device = btrfs_find_device_missing_or_by_path(fs_info, devpath);
+		return device;
 	}
-	return device;
+
+	if (!device_path || !device_path[0])
+		return ERR_PTR(-EINVAL);
+
+	if (strcmp(device_path, "missing") == 0) {
+		/* Find first missing device */
+		list_for_each_entry(device, &fs_info->fs_devices->devices,
+				    dev_list) {
+			if (test_bit(BTRFS_DEV_STATE_IN_FS_METADATA,
+				     &device->dev_state) && !device->bdev)
+				return device;
+		}
+		return ERR_PTR(-ENOENT);
+	}
+
+	return btrfs_find_device_by_path(fs_info, device_path);
 }
 
 /*
@@ -2510,9 +2464,9 @@ static int btrfs_prepare_sprout(struct btrfs_fs_info *fs_info)
 /*
  * Store the expected generation for seed devices in device items.
  */
-static int btrfs_finish_sprout(struct btrfs_trans_handle *trans,
-			       struct btrfs_fs_info *fs_info)
+static int btrfs_finish_sprout(struct btrfs_trans_handle *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_root *root = fs_info->chunk_root;
 	struct btrfs_path *path;
 	struct extent_buffer *leaf;
@@ -2563,7 +2517,8 @@ next_slot:
 				   BTRFS_UUID_SIZE);
 		read_extent_buffer(leaf, fs_uuid, btrfs_device_fsid(dev_item),
 				   BTRFS_FSID_SIZE);
-		device = btrfs_find_device(fs_info, devid, dev_uuid, fs_uuid);
+		device = btrfs_find_device(fs_info->fs_devices, devid, dev_uuid,
+					   fs_uuid, true);
 		BUG_ON(!device); /* Logic error */
 
 		if (device->fs_devices->seeding) {
@@ -2711,7 +2666,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 
 	if (seeding_dev) {
 		mutex_lock(&fs_info->chunk_mutex);
-		ret = init_first_rw_device(trans, fs_info);
+		ret = init_first_rw_device(trans);
 		mutex_unlock(&fs_info->chunk_mutex);
 		if (ret) {
 			btrfs_abort_transaction(trans, ret);
@@ -2728,7 +2683,7 @@ int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *device_path
 	if (seeding_dev) {
 		char fsid_buf[BTRFS_UUID_UNPARSED_SIZE];
 
-		ret = btrfs_finish_sprout(trans, fs_info);
+		ret = btrfs_finish_sprout(trans);
 		if (ret) {
 			btrfs_abort_transaction(trans, ret);
 			goto error_sysfs;
@@ -2858,7 +2813,6 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans,
 {
 	struct btrfs_fs_info *fs_info = device->fs_info;
 	struct btrfs_super_block *super_copy = fs_info->super_copy;
-	struct btrfs_fs_devices *fs_devices;
 	u64 old_total;
 	u64 diff;
 
@@ -2877,8 +2831,6 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans,
 		return -EINVAL;
 	}
 
-	fs_devices = fs_info->fs_devices;
-
 	btrfs_set_super_total_bytes(super_copy,
 			round_down(old_total + diff, fs_info->sectorsize));
 	device->fs_devices->total_rw_bytes += diff;
@@ -2886,9 +2838,9 @@ int btrfs_grow_device(struct btrfs_trans_handle *trans,
 	btrfs_device_set_total_bytes(device, new_size);
 	btrfs_device_set_disk_total_bytes(device, new_size);
 	btrfs_clear_space_info_full(device->fs_info);
-	if (list_empty(&device->resized_list))
-		list_add_tail(&device->resized_list,
-			      &fs_devices->resized_devices);
+	if (list_empty(&device->post_commit_list))
+		list_add_tail(&device->post_commit_list,
+			      &trans->transaction->dev_update_list);
 	mutex_unlock(&fs_info->chunk_mutex);
 
 	return btrfs_update_device(trans, device);
@@ -3607,10 +3559,10 @@ static int chunk_soft_convert_filter(u64 chunk_type,
 	return 0;
 }
 
-static int should_balance_chunk(struct btrfs_fs_info *fs_info,
-				struct extent_buffer *leaf,
+static int should_balance_chunk(struct extent_buffer *leaf,
 				struct btrfs_chunk *chunk, u64 chunk_offset)
 {
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
 	struct btrfs_balance_control *bctl = fs_info->balance_ctl;
 	struct btrfs_balance_args *bargs = NULL;
 	u64 chunk_type = btrfs_chunk_type(leaf, chunk);
@@ -3790,8 +3742,7 @@ again:
 			spin_unlock(&fs_info->balance_lock);
 		}
 
-		ret = should_balance_chunk(fs_info, leaf, chunk,
-					   found_key.offset);
+		ret = should_balance_chunk(leaf, chunk, found_key.offset);
 
 		btrfs_release_path(path);
 		if (!ret) {
@@ -4667,8 +4618,7 @@ int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info)
 	if (IS_ERR(trans))
 		return PTR_ERR(trans);
 
-	uuid_root = btrfs_create_tree(trans, fs_info,
-				      BTRFS_UUID_TREE_OBJECTID);
+	uuid_root = btrfs_create_tree(trans, BTRFS_UUID_TREE_OBJECTID);
 	if (IS_ERR(uuid_root)) {
 		ret = PTR_ERR(uuid_root);
 		btrfs_abort_transaction(trans, ret);
@@ -4728,15 +4678,16 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
 	int slot;
 	int failed = 0;
 	bool retried = false;
-	bool checked_pending_chunks = false;
 	struct extent_buffer *l;
 	struct btrfs_key key;
 	struct btrfs_super_block *super_copy = fs_info->super_copy;
 	u64 old_total = btrfs_super_total_bytes(super_copy);
 	u64 old_size = btrfs_device_get_total_bytes(device);
 	u64 diff;
+	u64 start;
 
 	new_size = round_down(new_size, fs_info->sectorsize);
+	start = new_size;
 	diff = round_down(old_size - new_size, fs_info->sectorsize);
 
 	if (test_bit(BTRFS_DEV_STATE_REPLACE_TGT, &device->dev_state))
@@ -4748,6 +4699,12 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
 
 	path->reada = READA_BACK;
 
+	trans = btrfs_start_transaction(root, 0);
+	if (IS_ERR(trans)) {
+		btrfs_free_path(path);
+		return PTR_ERR(trans);
+	}
+
 	mutex_lock(&fs_info->chunk_mutex);
 
 	btrfs_device_set_total_bytes(device, new_size);
@@ -4755,7 +4712,21 @@ int btrfs_shrink_device(struct btrfs_device *device, u64 new_size)
 		device->fs_devices->total_rw_bytes -= diff;
 		atomic64_sub(diff, &fs_info->free_chunk_space);
 	}
-	mutex_unlock(&fs_info->chunk_mutex);
+
+	/*
+	 * Once the device's size has been set to the new size, ensure all
+	 * in-memory chunks are synced to disk so that the loop below sees them
+	 * and relocates them accordingly.
+	 */
+	if (contains_pending_extent(device, &start, diff)) {
+		mutex_unlock(&fs_info->chunk_mutex);
+		ret = btrfs_commit_transaction(trans);
+		if (ret)
+			goto done;
+	} else {
+		mutex_unlock(&fs_info->chunk_mutex);
+		btrfs_end_transaction(trans);
+	}
 
 again:
 	key.objectid = device->devid;
@@ -4846,40 +4817,10 @@ again:
 	}
 
 	mutex_lock(&fs_info->chunk_mutex);
-
-	/*
-	 * We checked in the above loop all device extents that were already in
-	 * the device tree. However before we have updated the device's
-	 * total_bytes to the new size, we might have had chunk allocations that
-	 * have not complete yet (new block groups attached to transaction
-	 * handles), and therefore their device extents were not yet in the
-	 * device tree and we missed them in the loop above. So if we have any
-	 * pending chunk using a device extent that overlaps the device range
-	 * that we can not use anymore, commit the current transaction and
-	 * repeat the search on the device tree - this way we guarantee we will
-	 * not have chunks using device extents that end beyond 'new_size'.
-	 */
-	if (!checked_pending_chunks) {
-		u64 start = new_size;
-		u64 len = old_size - new_size;
-
-		if (contains_pending_extent(trans->transaction, device,
-					    &start, len)) {
-			mutex_unlock(&fs_info->chunk_mutex);
-			checked_pending_chunks = true;
-			failed = 0;
-			retried = false;
-			ret = btrfs_commit_transaction(trans);
-			if (ret)
-				goto done;
-			goto again;
-		}
-	}
-
 	btrfs_device_set_disk_total_bytes(device, new_size);
-	if (list_empty(&device->resized_list))
-		list_add_tail(&device->resized_list,
-			      &fs_info->fs_devices->resized_devices);
+	if (list_empty(&device->post_commit_list))
+		list_add_tail(&device->post_commit_list,
+			      &trans->transaction->dev_update_list);
 
 	WARN_ON(diff > old_total);
 	btrfs_set_super_total_bytes(super_copy,
@@ -4963,15 +4904,6 @@ static void check_raid56_incompat_flag(struct btrfs_fs_info *info, u64 type)
 	btrfs_set_fs_incompat(info, RAID56);
 }
 
-#define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info)	\
-			- sizeof(struct btrfs_chunk))		\
-			/ sizeof(struct btrfs_stripe) + 1)
-
-#define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE	\
-				- 2 * sizeof(struct btrfs_disk_key)	\
-				- 2 * sizeof(struct btrfs_chunk))	\
-				/ sizeof(struct btrfs_stripe) + 1)
-
 static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 			       u64 start, u64 type)
 {
@@ -5044,7 +4976,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 	} else {
 		btrfs_err(info, "invalid chunk type 0x%llx requested",
 		       type);
-		BUG_ON(1);
+		BUG();
 	}
 
 	/* We don't want a chunk larger than 10% of writable space */
@@ -5085,7 +5017,7 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 		if (total_avail == 0)
 			continue;
 
-		ret = find_free_dev_extent(trans, device,
+		ret = find_free_dev_extent(device,
 					   max_stripe_size * dev_stripes,
 					   &dev_offset, &max_avail);
 		if (ret && ret != -ENOSPC)
@@ -5219,18 +5151,20 @@ static int __btrfs_alloc_chunk(struct btrfs_trans_handle *trans,
 		free_extent_map(em);
 		goto error;
 	}
-
-	list_add_tail(&em->list, &trans->transaction->pending_chunks);
-	refcount_inc(&em->refs);
 	write_unlock(&em_tree->lock);
 
 	ret = btrfs_make_block_group(trans, 0, type, start, chunk_size);
 	if (ret)
 		goto error_del_extent;
 
-	for (i = 0; i < map->num_stripes; i++)
-		btrfs_device_set_bytes_used(map->stripes[i].dev,
-				map->stripes[i].dev->bytes_used + stripe_size);
+	for (i = 0; i < map->num_stripes; i++) {
+		struct btrfs_device *dev = map->stripes[i].dev;
+
+		btrfs_device_set_bytes_used(dev, dev->bytes_used + stripe_size);
+		if (list_empty(&dev->post_commit_list))
+			list_add_tail(&dev->post_commit_list,
+				      &trans->transaction->dev_update_list);
+	}
 
 	atomic64_sub(stripe_size * map->num_stripes, &info->free_chunk_space);
 
@@ -5249,8 +5183,6 @@ error_del_extent:
 	free_extent_map(em);
 	/* One for the tree reference */
 	free_extent_map(em);
-	/* One for the pending_chunks list reference */
-	free_extent_map(em);
 error:
 	kfree(devices_info);
 	return ret;
@@ -5370,9 +5302,9 @@ int btrfs_alloc_chunk(struct btrfs_trans_handle *trans, u64 type)
 	return __btrfs_alloc_chunk(trans, chunk_offset, type);
 }
 
-static noinline int init_first_rw_device(struct btrfs_trans_handle *trans,
-					 struct btrfs_fs_info *fs_info)
+static noinline int init_first_rw_device(struct btrfs_trans_handle *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	u64 chunk_offset;
 	u64 sys_chunk_offset;
 	u64 alloc_profile;
@@ -6413,7 +6345,7 @@ static void btrfs_end_bio(struct bio *bio)
 				if (bio_op(bio) == REQ_OP_WRITE)
 					btrfs_dev_stat_inc_and_print(dev,
 						BTRFS_DEV_STAT_WRITE_ERRS);
-				else
+				else if (!(bio->bi_opf & REQ_RAHEAD))
 					btrfs_dev_stat_inc_and_print(dev,
 						BTRFS_DEV_STAT_READ_ERRS);
 				if (bio->bi_opf & REQ_PREFLUSH)
@@ -6616,21 +6548,36 @@ blk_status_t btrfs_map_bio(struct btrfs_fs_info *fs_info, struct bio *bio,
 	return BLK_STS_OK;
 }
 
-struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
-				       u8 *uuid, u8 *fsid)
+/*
+ * Find a device specified by @devid or @uuid in the list of @fs_devices, or
+ * return NULL.
+ *
+ * If devid and uuid are both specified, the match must be exact, otherwise
+ * only devid is used.
+ *
+ * If @seed is true, traverse through the seed devices.
+ */
+struct btrfs_device *btrfs_find_device(struct btrfs_fs_devices *fs_devices,
+				       u64 devid, u8 *uuid, u8 *fsid,
+				       bool seed)
 {
 	struct btrfs_device *device;
-	struct btrfs_fs_devices *cur_devices;
 
-	cur_devices = fs_info->fs_devices;
-	while (cur_devices) {
+	while (fs_devices) {
 		if (!fsid ||
-		    !memcmp(cur_devices->metadata_uuid, fsid, BTRFS_FSID_SIZE)) {
-			device = find_device(cur_devices, devid, uuid);
-			if (device)
-				return device;
+		    !memcmp(fs_devices->metadata_uuid, fsid, BTRFS_FSID_SIZE)) {
+			list_for_each_entry(device, &fs_devices->devices,
+					    dev_list) {
+				if (device->devid == devid &&
+				    (!uuid || memcmp(device->uuid, uuid,
+						     BTRFS_UUID_SIZE) == 0))
+					return device;
+			}
 		}
-		cur_devices = cur_devices->seed;
+		if (seed)
+			fs_devices = fs_devices->seed;
+		else
+			return NULL;
 	}
 	return NULL;
 }
@@ -6705,99 +6652,6 @@ struct btrfs_device *btrfs_alloc_device(struct btrfs_fs_info *fs_info,
 	return dev;
 }
 
-/* Return -EIO if any error, otherwise return 0. */
-static int btrfs_check_chunk_valid(struct btrfs_fs_info *fs_info,
-				   struct extent_buffer *leaf,
-				   struct btrfs_chunk *chunk, u64 logical)
-{
-	u64 length;
-	u64 stripe_len;
-	u16 num_stripes;
-	u16 sub_stripes;
-	u64 type;
-	u64 features;
-	bool mixed = false;
-
-	length = btrfs_chunk_length(leaf, chunk);
-	stripe_len = btrfs_chunk_stripe_len(leaf, chunk);
-	num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
-	sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
-	type = btrfs_chunk_type(leaf, chunk);
-
-	if (!num_stripes) {
-		btrfs_err(fs_info, "invalid chunk num_stripes: %u",
-			  num_stripes);
-		return -EIO;
-	}
-	if (!IS_ALIGNED(logical, fs_info->sectorsize)) {
-		btrfs_err(fs_info, "invalid chunk logical %llu", logical);
-		return -EIO;
-	}
-	if (btrfs_chunk_sector_size(leaf, chunk) != fs_info->sectorsize) {
-		btrfs_err(fs_info, "invalid chunk sectorsize %u",
-			  btrfs_chunk_sector_size(leaf, chunk));
-		return -EIO;
-	}
-	if (!length || !IS_ALIGNED(length, fs_info->sectorsize)) {
-		btrfs_err(fs_info, "invalid chunk length %llu", length);
-		return -EIO;
-	}
-	if (!is_power_of_2(stripe_len) || stripe_len != BTRFS_STRIPE_LEN) {
-		btrfs_err(fs_info, "invalid chunk stripe length: %llu",
-			  stripe_len);
-		return -EIO;
-	}
-	if (~(BTRFS_BLOCK_GROUP_TYPE_MASK | BTRFS_BLOCK_GROUP_PROFILE_MASK) &
-	    type) {
-		btrfs_err(fs_info, "unrecognized chunk type: %llu",
-			  ~(BTRFS_BLOCK_GROUP_TYPE_MASK |
-			    BTRFS_BLOCK_GROUP_PROFILE_MASK) &
-			  btrfs_chunk_type(leaf, chunk));
-		return -EIO;
-	}
-
-	if ((type & BTRFS_BLOCK_GROUP_TYPE_MASK) == 0) {
-		btrfs_err(fs_info, "missing chunk type flag: 0x%llx", type);
-		return -EIO;
-	}
-
-	if ((type & BTRFS_BLOCK_GROUP_SYSTEM) &&
-	    (type & (BTRFS_BLOCK_GROUP_METADATA | BTRFS_BLOCK_GROUP_DATA))) {
-		btrfs_err(fs_info,
-			"system chunk with data or metadata type: 0x%llx", type);
-		return -EIO;
-	}
-
-	features = btrfs_super_incompat_flags(fs_info->super_copy);
-	if (features & BTRFS_FEATURE_INCOMPAT_MIXED_GROUPS)
-		mixed = true;
-
-	if (!mixed) {
-		if ((type & BTRFS_BLOCK_GROUP_METADATA) &&
-		    (type & BTRFS_BLOCK_GROUP_DATA)) {
-			btrfs_err(fs_info,
-			"mixed chunk type in non-mixed mode: 0x%llx", type);
-			return -EIO;
-		}
-	}
-
-	if ((type & BTRFS_BLOCK_GROUP_RAID10 && sub_stripes != 2) ||
-	    (type & BTRFS_BLOCK_GROUP_RAID1 && num_stripes < 1) ||
-	    (type & BTRFS_BLOCK_GROUP_RAID5 && num_stripes < 2) ||
-	    (type & BTRFS_BLOCK_GROUP_RAID6 && num_stripes < 3) ||
-	    (type & BTRFS_BLOCK_GROUP_DUP && num_stripes > 2) ||
-	    ((type & BTRFS_BLOCK_GROUP_PROFILE_MASK) == 0 &&
-	     num_stripes != 1)) {
-		btrfs_err(fs_info,
-			"invalid num_stripes:sub_stripes %u:%u for profile %llu",
-			num_stripes, sub_stripes,
-			type & BTRFS_BLOCK_GROUP_PROFILE_MASK);
-		return -EIO;
-	}
-
-	return 0;
-}
-
 static void btrfs_report_missing_device(struct btrfs_fs_info *fs_info,
 					u64 devid, u8 *uuid, bool error)
 {
@@ -6809,10 +6663,30 @@ static void btrfs_report_missing_device(struct btrfs_fs_info *fs_info,
 			      devid, uuid);
 }
 
-static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
-			  struct extent_buffer *leaf,
+static u64 calc_stripe_length(u64 type, u64 chunk_len, int num_stripes)
+{
+	int index = btrfs_bg_flags_to_raid_index(type);
+	int ncopies = btrfs_raid_array[index].ncopies;
+	int data_stripes;
+
+	switch (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
+	case BTRFS_BLOCK_GROUP_RAID5:
+		data_stripes = num_stripes - 1;
+		break;
+	case BTRFS_BLOCK_GROUP_RAID6:
+		data_stripes = num_stripes - 2;
+		break;
+	default:
+		data_stripes = num_stripes / ncopies;
+		break;
+	}
+	return div_u64(chunk_len, data_stripes);
+}
+
+static int read_one_chunk(struct btrfs_key *key, struct extent_buffer *leaf,
 			  struct btrfs_chunk *chunk)
 {
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
 	struct btrfs_mapping_tree *map_tree = &fs_info->mapping_tree;
 	struct map_lookup *map;
 	struct extent_map *em;
@@ -6828,9 +6702,15 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
 	length = btrfs_chunk_length(leaf, chunk);
 	num_stripes = btrfs_chunk_num_stripes(leaf, chunk);
 
-	ret = btrfs_check_chunk_valid(fs_info, leaf, chunk, logical);
-	if (ret)
-		return ret;
+	/*
+	 * Only need to verify chunk item if we're reading from sys chunk array,
+	 * as chunk item in tree block is already verified by tree-checker.
+	 */
+	if (leaf->start == BTRFS_SUPER_INFO_OFFSET) {
+		ret = btrfs_check_chunk_valid(leaf, chunk, logical);
+		if (ret)
+			return ret;
+	}
 
 	read_lock(&map_tree->map_tree.lock);
 	em = lookup_extent_mapping(&map_tree->map_tree, logical, 1);
@@ -6868,6 +6748,8 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
 	map->type = btrfs_chunk_type(leaf, chunk);
 	map->sub_stripes = btrfs_chunk_sub_stripes(leaf, chunk);
 	map->verified_stripes = 0;
+	em->orig_block_len = calc_stripe_length(map->type, em->len,
+						map->num_stripes);
 	for (i = 0; i < num_stripes; i++) {
 		map->stripes[i].physical =
 			btrfs_stripe_offset_nr(leaf, chunk, i);
@@ -6875,8 +6757,8 @@ static int read_one_chunk(struct btrfs_fs_info *fs_info, struct btrfs_key *key,
 		read_extent_buffer(leaf, uuid, (unsigned long)
 				   btrfs_stripe_dev_uuid_nr(chunk, i),
 				   BTRFS_UUID_SIZE);
-		map->stripes[i].dev = btrfs_find_device(fs_info, devid,
-							uuid, NULL);
+		map->stripes[i].dev = btrfs_find_device(fs_info->fs_devices,
+							devid, uuid, NULL, true);
 		if (!map->stripes[i].dev &&
 		    !btrfs_test_opt(fs_info, DEGRADED)) {
 			free_extent_map(em);
@@ -6992,10 +6874,10 @@ out:
 	return fs_devices;
 }
 
-static int read_one_dev(struct btrfs_fs_info *fs_info,
-			struct extent_buffer *leaf,
+static int read_one_dev(struct extent_buffer *leaf,
 			struct btrfs_dev_item *dev_item)
 {
+	struct btrfs_fs_info *fs_info = leaf->fs_info;
 	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
 	struct btrfs_device *device;
 	u64 devid;
@@ -7015,7 +6897,8 @@ static int read_one_dev(struct btrfs_fs_info *fs_info,
 			return PTR_ERR(fs_devices);
 	}
 
-	device = btrfs_find_device(fs_info, devid, dev_uuid, fs_uuid);
+	device = btrfs_find_device(fs_info->fs_devices, devid, dev_uuid,
+				   fs_uuid, true);
 	if (!device) {
 		if (!btrfs_test_opt(fs_info, DEGRADED)) {
 			btrfs_report_missing_device(fs_info, devid,
@@ -7183,7 +7066,7 @@ int btrfs_read_sys_array(struct btrfs_fs_info *fs_info)
 			if (cur_offset + len > array_size)
 				goto out_short_read;
 
-			ret = read_one_chunk(fs_info, &key, sb, chunk);
+			ret = read_one_chunk(&key, sb, chunk);
 			if (ret)
 				break;
 		} else {
@@ -7324,14 +7207,14 @@ int btrfs_read_chunk_tree(struct btrfs_fs_info *fs_info)
 			struct btrfs_dev_item *dev_item;
 			dev_item = btrfs_item_ptr(leaf, slot,
 						  struct btrfs_dev_item);
-			ret = read_one_dev(fs_info, leaf, dev_item);
+			ret = read_one_dev(leaf, dev_item);
 			if (ret)
 				goto error;
 			total_dev++;
 		} else if (found_key.type == BTRFS_CHUNK_ITEM_KEY) {
 			struct btrfs_chunk *chunk;
 			chunk = btrfs_item_ptr(leaf, slot, struct btrfs_chunk);
-			ret = read_one_chunk(fs_info, &found_key, leaf, chunk);
+			ret = read_one_chunk(&found_key, leaf, chunk);
 			if (ret)
 				goto error;
 		}
@@ -7520,9 +7403,9 @@ out:
 /*
  * called from commit_transaction. Writes all changed device stats to disk.
  */
-int btrfs_run_dev_stats(struct btrfs_trans_handle *trans,
-			struct btrfs_fs_info *fs_info)
+int btrfs_run_dev_stats(struct btrfs_trans_handle *trans)
 {
+	struct btrfs_fs_info *fs_info = trans->fs_info;
 	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
 	struct btrfs_device *device;
 	int stats_cnt;
@@ -7605,7 +7488,8 @@ int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info,
 	int i;
 
 	mutex_lock(&fs_devices->device_list_mutex);
-	dev = btrfs_find_device(fs_info, stats->devid, NULL, NULL);
+	dev = btrfs_find_device(fs_info->fs_devices, stats->devid, NULL, NULL,
+				true);
 	mutex_unlock(&fs_devices->device_list_mutex);
 
 	if (!dev) {
@@ -7663,51 +7547,34 @@ void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_pat
 }
 
 /*
- * Update the size of all devices, which is used for writing out the
- * super blocks.
+ * Update the size and bytes used for each device where it changed.  This is
+ * delayed since we would otherwise get errors while writing out the
+ * superblocks.
+ *
+ * Must be invoked during transaction commit.
  */
-void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info)
+void btrfs_commit_device_sizes(struct btrfs_transaction *trans)
 {
-	struct btrfs_fs_devices *fs_devices = fs_info->fs_devices;
 	struct btrfs_device *curr, *next;
 
-	if (list_empty(&fs_devices->resized_devices))
-		return;
+	ASSERT(trans->state == TRANS_STATE_COMMIT_DOING);
 
-	mutex_lock(&fs_devices->device_list_mutex);
-	mutex_lock(&fs_info->chunk_mutex);
-	list_for_each_entry_safe(curr, next, &fs_devices->resized_devices,
-				 resized_list) {
-		list_del_init(&curr->resized_list);
-		curr->commit_total_bytes = curr->disk_total_bytes;
-	}
-	mutex_unlock(&fs_info->chunk_mutex);
-	mutex_unlock(&fs_devices->device_list_mutex);
-}
-
-/* Must be invoked during the transaction commit */
-void btrfs_update_commit_device_bytes_used(struct btrfs_transaction *trans)
-{
-	struct btrfs_fs_info *fs_info = trans->fs_info;
-	struct extent_map *em;
-	struct map_lookup *map;
-	struct btrfs_device *dev;
-	int i;
-
-	if (list_empty(&trans->pending_chunks))
+	if (list_empty(&trans->dev_update_list))
 		return;
 
-	/* In order to kick the device replace finish process */
-	mutex_lock(&fs_info->chunk_mutex);
-	list_for_each_entry(em, &trans->pending_chunks, list) {
-		map = em->map_lookup;
-
-		for (i = 0; i < map->num_stripes; i++) {
-			dev = map->stripes[i].dev;
-			dev->commit_bytes_used = dev->bytes_used;
-		}
+	/*
+	 * We don't need the device_list_mutex here.  This list is owned by the
+	 * transaction and the transaction must complete before the device is
+	 * released.
+	 */
+	mutex_lock(&trans->fs_info->chunk_mutex);
+	list_for_each_entry_safe(curr, next, &trans->dev_update_list,
+				 post_commit_list) {
+		list_del_init(&curr->post_commit_list);
+		curr->commit_total_bytes = curr->disk_total_bytes;
+		curr->commit_bytes_used = curr->bytes_used;
 	}
-	mutex_unlock(&fs_info->chunk_mutex);
+	mutex_unlock(&trans->fs_info->chunk_mutex);
 }
 
 void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info)
@@ -7740,25 +7607,6 @@ int btrfs_bg_type_to_factor(u64 flags)
 }
 
 
-static u64 calc_stripe_length(u64 type, u64 chunk_len, int num_stripes)
-{
-	int index = btrfs_bg_flags_to_raid_index(type);
-	int ncopies = btrfs_raid_array[index].ncopies;
-	int data_stripes;
-
-	switch (type & BTRFS_BLOCK_GROUP_PROFILE_MASK) {
-	case BTRFS_BLOCK_GROUP_RAID5:
-		data_stripes = num_stripes - 1;
-		break;
-	case BTRFS_BLOCK_GROUP_RAID6:
-		data_stripes = num_stripes - 2;
-		break;
-	default:
-		data_stripes = num_stripes / ncopies;
-		break;
-	}
-	return div_u64(chunk_len, data_stripes);
-}
 
 static int verify_one_dev_extent(struct btrfs_fs_info *fs_info,
 				 u64 chunk_offset, u64 devid,
@@ -7819,7 +7667,7 @@ static int verify_one_dev_extent(struct btrfs_fs_info *fs_info,
 	}
 
 	/* Make sure no dev extent is beyond device bondary */
-	dev = btrfs_find_device(fs_info, devid, NULL, NULL);
+	dev = btrfs_find_device(fs_info->fs_devices, devid, NULL, NULL, true);
 	if (!dev) {
 		btrfs_err(fs_info, "failed to find devid %llu", devid);
 		ret = -EUCLEAN;
@@ -7828,7 +7676,8 @@ static int verify_one_dev_extent(struct btrfs_fs_info *fs_info,
 
 	/* It's possible this device is a dummy for seed device */
 	if (dev->disk_total_bytes == 0) {
-		dev = find_device(fs_info->fs_devices->seed, devid, NULL);
+		dev = btrfs_find_device(fs_info->fs_devices->seed, devid, NULL,
+					NULL, false);
 		if (!dev) {
 			btrfs_err(fs_info, "failed to find seed devid %llu",
 				  devid);
diff --git a/fs/btrfs/volumes.h b/fs/btrfs/volumes.h
index ed806649a473..136a3eb64604 100644
--- a/fs/btrfs/volumes.h
+++ b/fs/btrfs/volumes.h
@@ -45,6 +45,7 @@ struct btrfs_pending_bios {
 struct btrfs_device {
 	struct list_head dev_list;
 	struct list_head dev_alloc_list;
+	struct list_head post_commit_list; /* chunk mutex */
 	struct btrfs_fs_devices *fs_devices;
 	struct btrfs_fs_info *fs_info;
 
@@ -102,18 +103,12 @@ struct btrfs_device {
 	 * size of the device on the current transaction
 	 *
 	 * This variant is update when committing the transaction,
-	 * and protected by device_list_mutex
+	 * and protected by chunk mutex
 	 */
 	u64 commit_total_bytes;
 
 	/* bytes used on the current transaction */
 	u64 commit_bytes_used;
-	/*
-	 * used to manage the device which is resized
-	 *
-	 * It is protected by chunk_lock.
-	 */
-	struct list_head resized_list;
 
 	/* for sending down flush barriers */
 	struct bio *flush_bio;
@@ -123,7 +118,6 @@ struct btrfs_device {
 	struct scrub_ctx *scrub_ctx;
 
 	struct btrfs_work work;
-	struct rcu_head rcu;
 
 	/* readahead state */
 	atomic_t reada_in_flight;
@@ -139,6 +133,8 @@ struct btrfs_device {
 	/* Counter to record the change of device stats */
 	atomic_t dev_stats_ccnt;
 	atomic_t dev_stat_values[BTRFS_DEV_STAT_VALUES_MAX];
+
+	struct extent_io_tree alloc_state;
 };
 
 /*
@@ -235,7 +231,6 @@ struct btrfs_fs_devices {
 	struct mutex device_list_mutex;
 	struct list_head devices;
 
-	struct list_head resized_devices;
 	/* devices not currently being allocated */
 	struct list_head alloc_list;
 
@@ -258,6 +253,15 @@ struct btrfs_fs_devices {
 
 #define BTRFS_BIO_INLINE_CSUM_SIZE	64
 
+#define BTRFS_MAX_DEVS(info) ((BTRFS_MAX_ITEM_SIZE(info)	\
+			- sizeof(struct btrfs_chunk))		\
+			/ sizeof(struct btrfs_stripe) + 1)
+
+#define BTRFS_MAX_DEVS_SYS_CHUNK ((BTRFS_SYSTEM_CHUNK_ARRAY_SIZE	\
+				- 2 * sizeof(struct btrfs_disk_key)	\
+				- 2 * sizeof(struct btrfs_chunk))	\
+				/ sizeof(struct btrfs_stripe) + 1)
+
 /*
  * we need the mirror number and stripe index to be passed around
  * the call chain while we are processing end_io (especially errors).
@@ -390,6 +394,7 @@ static inline enum btrfs_map_op btrfs_op(struct bio *bio)
 		return BTRFS_MAP_WRITE;
 	default:
 		WARN_ON_ONCE(1);
+		/* fall through */
 	case REQ_OP_READ:
 		return BTRFS_MAP_READ;
 	}
@@ -416,6 +421,7 @@ int btrfs_open_devices(struct btrfs_fs_devices *fs_devices,
 		       fmode_t flags, void *holder);
 struct btrfs_device *btrfs_scan_one_device(const char *path,
 					   fmode_t flags, void *holder);
+int btrfs_forget_devices(const char *path);
 int btrfs_close_devices(struct btrfs_fs_devices *fs_devices);
 void btrfs_free_extra_devids(struct btrfs_fs_devices *fs_devices, int step);
 void btrfs_assign_next_active_device(struct btrfs_device *device,
@@ -433,8 +439,8 @@ void __exit btrfs_cleanup_fs_uuids(void);
 int btrfs_num_copies(struct btrfs_fs_info *fs_info, u64 logical, u64 len);
 int btrfs_grow_device(struct btrfs_trans_handle *trans,
 		      struct btrfs_device *device, u64 new_size);
-struct btrfs_device *btrfs_find_device(struct btrfs_fs_info *fs_info, u64 devid,
-				       u8 *uuid, u8 *fsid);
+struct btrfs_device *btrfs_find_device(struct btrfs_fs_devices *fs_devices,
+				       u64 devid, u8 *uuid, u8 *fsid, bool seed);
 int btrfs_shrink_device(struct btrfs_device *device, u64 new_size);
 int btrfs_init_new_device(struct btrfs_fs_info *fs_info, const char *path);
 int btrfs_balance(struct btrfs_fs_info *fs_info,
@@ -448,22 +454,18 @@ int btrfs_cancel_balance(struct btrfs_fs_info *fs_info);
 int btrfs_create_uuid_tree(struct btrfs_fs_info *fs_info);
 int btrfs_check_uuid_tree(struct btrfs_fs_info *fs_info);
 int btrfs_chunk_readonly(struct btrfs_fs_info *fs_info, u64 chunk_offset);
-int find_free_dev_extent_start(struct btrfs_transaction *transaction,
-			 struct btrfs_device *device, u64 num_bytes,
-			 u64 search_start, u64 *start, u64 *max_avail);
-int find_free_dev_extent(struct btrfs_trans_handle *trans,
-			 struct btrfs_device *device, u64 num_bytes,
+int find_free_dev_extent_start(struct btrfs_device *device, u64 num_bytes,
+			       u64 search_start, u64 *start, u64 *max_avail);
+int find_free_dev_extent(struct btrfs_device *device, u64 num_bytes,
 			 u64 *start, u64 *max_avail);
 void btrfs_dev_stat_inc_and_print(struct btrfs_device *dev, int index);
 int btrfs_get_dev_stats(struct btrfs_fs_info *fs_info,
 			struct btrfs_ioctl_get_dev_stats *stats);
 void btrfs_init_devices_late(struct btrfs_fs_info *fs_info);
 int btrfs_init_dev_stats(struct btrfs_fs_info *fs_info);
-int btrfs_run_dev_stats(struct btrfs_trans_handle *trans,
-			struct btrfs_fs_info *fs_info);
+int btrfs_run_dev_stats(struct btrfs_trans_handle *trans);
 void btrfs_rm_dev_replace_remove_srcdev(struct btrfs_device *srcdev);
-void btrfs_rm_dev_replace_free_srcdev(struct btrfs_fs_info *fs_info,
-				      struct btrfs_device *srcdev);
+void btrfs_rm_dev_replace_free_srcdev(struct btrfs_device *srcdev);
 void btrfs_destroy_dev_replace_tgtdev(struct btrfs_device *tgtdev);
 void btrfs_scratch_superblocks(struct block_device *bdev, const char *device_path);
 int btrfs_is_parity_mirror(struct btrfs_fs_info *fs_info,
@@ -557,8 +559,7 @@ static inline enum btrfs_raid_types btrfs_bg_flags_to_raid_index(u64 flags)
 
 const char *get_raid_name(enum btrfs_raid_types type);
 
-void btrfs_update_commit_device_size(struct btrfs_fs_info *fs_info);
-void btrfs_update_commit_device_bytes_used(struct btrfs_transaction *trans);
+void btrfs_commit_device_sizes(struct btrfs_transaction *trans);
 
 struct list_head *btrfs_get_fs_uuids(void);
 void btrfs_set_fs_info_ptr(struct btrfs_fs_info *fs_info);
diff --git a/fs/btrfs/xattr.c b/fs/btrfs/xattr.c
index f141b45ce349..95d9aebff2c4 100644
--- a/fs/btrfs/xattr.c
+++ b/fs/btrfs/xattr.c
@@ -76,9 +76,8 @@ out:
 	return ret;
 }
 
-static int do_setxattr(struct btrfs_trans_handle *trans,
-		       struct inode *inode, const char *name,
-		       const void *value, size_t size, int flags)
+int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode,
+		   const char *name, const void *value, size_t size, int flags)
 {
 	struct btrfs_dir_item *di = NULL;
 	struct btrfs_root *root = BTRFS_I(inode)->root;
@@ -87,6 +86,8 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
 	size_t name_len = strlen(name);
 	int ret = 0;
 
+	ASSERT(trans);
+
 	if (name_len + size > BTRFS_MAX_XATTR_SIZE(root->fs_info))
 		return -ENOSPC;
 
@@ -174,7 +175,7 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
 		char *ptr;
 
 		if (size > old_data_len) {
-			if (btrfs_leaf_free_space(fs_info, leaf) <
+			if (btrfs_leaf_free_space(leaf) <
 			    (size - old_data_len)) {
 				ret = -ENOSPC;
 				goto out;
@@ -184,17 +185,15 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
 		if (old_data_len + name_len + sizeof(*di) == item_size) {
 			/* No other xattrs packed in the same leaf item. */
 			if (size > old_data_len)
-				btrfs_extend_item(fs_info, path,
-						  size - old_data_len);
+				btrfs_extend_item(path, size - old_data_len);
 			else if (size < old_data_len)
-				btrfs_truncate_item(fs_info, path,
-						    data_size, 1);
+				btrfs_truncate_item(path, data_size, 1);
 		} else {
 			/* There are other xattrs packed in the same item. */
 			ret = btrfs_delete_one_dir_name(trans, root, path, di);
 			if (ret)
 				goto out;
-			btrfs_extend_item(fs_info, path, data_size);
+			btrfs_extend_item(path, data_size);
 		}
 
 		item = btrfs_item_nr(slot);
@@ -214,36 +213,32 @@ static int do_setxattr(struct btrfs_trans_handle *trans,
 	}
 out:
 	btrfs_free_path(path);
+	if (!ret)
+		set_bit(BTRFS_INODE_COPY_EVERYTHING,
+			&BTRFS_I(inode)->runtime_flags);
 	return ret;
 }
 
 /*
  * @value: "" makes the attribute to empty, NULL removes it
  */
-int btrfs_setxattr(struct btrfs_trans_handle *trans,
-		     struct inode *inode, const char *name,
-		     const void *value, size_t size, int flags)
+int btrfs_setxattr_trans(struct inode *inode, const char *name,
+			 const void *value, size_t size, int flags)
 {
 	struct btrfs_root *root = BTRFS_I(inode)->root;
+	struct btrfs_trans_handle *trans;
 	int ret;
 
-	if (btrfs_root_readonly(root))
-		return -EROFS;
-
-	if (trans)
-		return do_setxattr(trans, inode, name, value, size, flags);
-
 	trans = btrfs_start_transaction(root, 2);
 	if (IS_ERR(trans))
 		return PTR_ERR(trans);
 
-	ret = do_setxattr(trans, inode, name, value, size, flags);
+	ret = btrfs_setxattr(trans, inode, name, value, size, flags);
 	if (ret)
 		goto out;
 
 	inode_inc_iversion(inode);
 	inode->i_ctime = current_time(inode);
-	set_bit(BTRFS_INODE_COPY_EVERYTHING, &BTRFS_I(inode)->runtime_flags);
 	ret = btrfs_update_inode(trans, root, inode);
 	BUG_ON(ret);
 out:
@@ -370,7 +365,7 @@ static int btrfs_xattr_handler_set(const struct xattr_handler *handler,
 				   size_t size, int flags)
 {
 	name = xattr_full_name(handler, name);
-	return btrfs_setxattr(NULL, inode, name, buffer, size, flags);
+	return btrfs_setxattr_trans(inode, name, buffer, size, flags);
 }
 
 static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler,
@@ -378,8 +373,30 @@ static int btrfs_xattr_handler_set_prop(const struct xattr_handler *handler,
 					const char *name, const void *value,
 					size_t size, int flags)
 {
+	int ret;
+	struct btrfs_trans_handle *trans;
+	struct btrfs_root *root = BTRFS_I(inode)->root;
+
 	name = xattr_full_name(handler, name);
-	return btrfs_set_prop(inode, name, value, size, flags);
+	ret = btrfs_validate_prop(name, value, size);
+	if (ret)
+		return ret;
+
+	trans = btrfs_start_transaction(root, 2);
+	if (IS_ERR(trans))
+		return PTR_ERR(trans);
+
+	ret = btrfs_set_prop(trans, inode, name, value, size, flags);
+	if (!ret) {
+		inode_inc_iversion(inode);
+		inode->i_ctime = current_time(inode);
+		ret = btrfs_update_inode(trans, root, inode);
+		BUG_ON(ret);
+	}
+
+	btrfs_end_transaction(trans);
+
+	return ret;
 }
 
 static const struct xattr_handler btrfs_security_xattr_handler = {
@@ -419,10 +436,10 @@ const struct xattr_handler *btrfs_xattr_handlers[] = {
 };
 
 static int btrfs_initxattrs(struct inode *inode,
-			    const struct xattr *xattr_array, void *fs_info)
+			    const struct xattr *xattr_array, void *fs_private)
 {
+	struct btrfs_trans_handle *trans = fs_private;
 	const struct xattr *xattr;
-	struct btrfs_trans_handle *trans = fs_info;
 	unsigned int nofs_flag;
 	char *name;
 	int err = 0;
@@ -442,7 +459,7 @@ static int btrfs_initxattrs(struct inode *inode,
 		strcpy(name, XATTR_SECURITY_PREFIX);
 		strcpy(name + XATTR_SECURITY_PREFIX_LEN, xattr->name);
 		err = btrfs_setxattr(trans, inode, name, xattr->value,
-				xattr->value_len, 0);
+				     xattr->value_len, 0);
 		kfree(name);
 		if (err < 0)
 			break;
diff --git a/fs/btrfs/xattr.h b/fs/btrfs/xattr.h
index 471fcac6ff55..1cd3fc0a8f17 100644
--- a/fs/btrfs/xattr.h
+++ b/fs/btrfs/xattr.h
@@ -12,9 +12,10 @@ extern const struct xattr_handler *btrfs_xattr_handlers[];
 
 int btrfs_getxattr(struct inode *inode, const char *name,
 		void *buffer, size_t size);
-int btrfs_setxattr(struct btrfs_trans_handle *trans,
-			    struct inode *inode, const char *name,
-			    const void *value, size_t size, int flags);
+int btrfs_setxattr(struct btrfs_trans_handle *trans, struct inode *inode,
+		   const char *name, const void *value, size_t size, int flags);
+int btrfs_setxattr_trans(struct inode *inode, const char *name,
+			 const void *value, size_t size, int flags);
 ssize_t btrfs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 
 int btrfs_xattr_security_init(struct btrfs_trans_handle *trans,
diff --git a/fs/btrfs/zlib.c b/fs/btrfs/zlib.c
index 970ff3e35bb3..b86b7ad6b900 100644
--- a/fs/btrfs/zlib.c
+++ b/fs/btrfs/zlib.c
@@ -27,6 +27,33 @@ struct workspace {
 	int level;
 };
 
+static struct workspace_manager wsm;
+
+static void zlib_init_workspace_manager(void)
+{
+	btrfs_init_workspace_manager(&wsm, &btrfs_zlib_compress);
+}
+
+static void zlib_cleanup_workspace_manager(void)
+{
+	btrfs_cleanup_workspace_manager(&wsm);
+}
+
+static struct list_head *zlib_get_workspace(unsigned int level)
+{
+	struct list_head *ws = btrfs_get_workspace(&wsm, level);
+	struct workspace *workspace = list_entry(ws, struct workspace, list);
+
+	workspace->level = level;
+
+	return ws;
+}
+
+static void zlib_put_workspace(struct list_head *ws)
+{
+	btrfs_put_workspace(&wsm, ws);
+}
+
 static void zlib_free_workspace(struct list_head *ws)
 {
 	struct workspace *workspace = list_entry(ws, struct workspace, list);
@@ -36,7 +63,7 @@ static void zlib_free_workspace(struct list_head *ws)
 	kfree(workspace);
 }
 
-static struct list_head *zlib_alloc_workspace(void)
+static struct list_head *zlib_alloc_workspace(unsigned int level)
 {
 	struct workspace *workspace;
 	int workspacesize;
@@ -48,6 +75,7 @@ static struct list_head *zlib_alloc_workspace(void)
 	workspacesize = max(zlib_deflate_workspacesize(MAX_WBITS, MAX_MEM_LEVEL),
 			zlib_inflate_workspacesize());
 	workspace->strm.workspace = kvmalloc(workspacesize, GFP_KERNEL);
+	workspace->level = level;
 	workspace->buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 	if (!workspace->strm.workspace || !workspace->buf)
 		goto fail;
@@ -390,18 +418,19 @@ next:
 	return ret;
 }
 
-static void zlib_set_level(struct list_head *ws, unsigned int type)
+static unsigned int zlib_set_level(unsigned int level)
 {
-	struct workspace *workspace = list_entry(ws, struct workspace, list);
-	unsigned level = (type & 0xF0) >> 4;
-
-	if (level > 9)
-		level = 9;
+	if (!level)
+		return BTRFS_ZLIB_DEFAULT_LEVEL;
 
-	workspace->level = level > 0 ? level : 3;
+	return min_t(unsigned int, level, 9);
 }
 
 const struct btrfs_compress_op btrfs_zlib_compress = {
+	.init_workspace_manager	= zlib_init_workspace_manager,
+	.cleanup_workspace_manager = zlib_cleanup_workspace_manager,
+	.get_workspace		= zlib_get_workspace,
+	.put_workspace		= zlib_put_workspace,
 	.alloc_workspace	= zlib_alloc_workspace,
 	.free_workspace		= zlib_free_workspace,
 	.compress_pages		= zlib_compress_pages,
diff --git a/fs/btrfs/zstd.c b/fs/btrfs/zstd.c
index af6ec59972f5..3837ca180d52 100644
--- a/fs/btrfs/zstd.c
+++ b/fs/btrfs/zstd.c
@@ -6,25 +6,31 @@
  */
 
 #include <linux/bio.h>
+#include <linux/bitmap.h>
 #include <linux/err.h>
 #include <linux/init.h>
 #include <linux/kernel.h>
 #include <linux/mm.h>
+#include <linux/sched/mm.h>
 #include <linux/pagemap.h>
 #include <linux/refcount.h>
 #include <linux/sched.h>
 #include <linux/slab.h>
 #include <linux/zstd.h>
 #include "compression.h"
+#include "ctree.h"
 
 #define ZSTD_BTRFS_MAX_WINDOWLOG 17
 #define ZSTD_BTRFS_MAX_INPUT (1 << ZSTD_BTRFS_MAX_WINDOWLOG)
 #define ZSTD_BTRFS_DEFAULT_LEVEL 3
+#define ZSTD_BTRFS_MAX_LEVEL 15
+/* 307s to avoid pathologically clashing with transaction commit */
+#define ZSTD_BTRFS_RECLAIM_JIFFIES (307 * HZ)
 
-static ZSTD_parameters zstd_get_btrfs_parameters(size_t src_len)
+static ZSTD_parameters zstd_get_btrfs_parameters(unsigned int level,
+						 size_t src_len)
 {
-	ZSTD_parameters params = ZSTD_getParams(ZSTD_BTRFS_DEFAULT_LEVEL,
-						src_len, 0);
+	ZSTD_parameters params = ZSTD_getParams(level, src_len, 0);
 
 	if (params.cParams.windowLog > ZSTD_BTRFS_MAX_WINDOWLOG)
 		params.cParams.windowLog = ZSTD_BTRFS_MAX_WINDOWLOG;
@@ -36,11 +42,295 @@ struct workspace {
 	void *mem;
 	size_t size;
 	char *buf;
+	unsigned int level;
+	unsigned int req_level;
+	unsigned long last_used; /* jiffies */
 	struct list_head list;
+	struct list_head lru_list;
 	ZSTD_inBuffer in_buf;
 	ZSTD_outBuffer out_buf;
 };
 
+/*
+ * Zstd Workspace Management
+ *
+ * Zstd workspaces have different memory requirements depending on the level.
+ * The zstd workspaces are managed by having individual lists for each level
+ * and a global lru.  Forward progress is maintained by protecting a max level
+ * workspace.
+ *
+ * Getting a workspace is done by using the bitmap to identify the levels that
+ * have available workspaces and scans up.  This lets us recycle higher level
+ * workspaces because of the monotonic memory guarantee.  A workspace's
+ * last_used is only updated if it is being used by the corresponding memory
+ * level.  Putting a workspace involves adding it back to the appropriate places
+ * and adding it back to the lru if necessary.
+ *
+ * A timer is used to reclaim workspaces if they have not been used for
+ * ZSTD_BTRFS_RECLAIM_JIFFIES.  This helps keep only active workspaces around.
+ * The upper bound is provided by the workqueue limit which is 2 (percpu limit).
+ */
+
+struct zstd_workspace_manager {
+	const struct btrfs_compress_op *ops;
+	spinlock_t lock;
+	struct list_head lru_list;
+	struct list_head idle_ws[ZSTD_BTRFS_MAX_LEVEL];
+	unsigned long active_map;
+	wait_queue_head_t wait;
+	struct timer_list timer;
+};
+
+static struct zstd_workspace_manager wsm;
+
+static size_t zstd_ws_mem_sizes[ZSTD_BTRFS_MAX_LEVEL];
+
+static inline struct workspace *list_to_workspace(struct list_head *list)
+{
+	return container_of(list, struct workspace, list);
+}
+
+static void zstd_free_workspace(struct list_head *ws);
+static struct list_head *zstd_alloc_workspace(unsigned int level);
+
+/*
+ * zstd_reclaim_timer_fn - reclaim timer
+ * @t: timer
+ *
+ * This scans the lru_list and attempts to reclaim any workspace that hasn't
+ * been used for ZSTD_BTRFS_RECLAIM_JIFFIES.
+ */
+static void zstd_reclaim_timer_fn(struct timer_list *timer)
+{
+	unsigned long reclaim_threshold = jiffies - ZSTD_BTRFS_RECLAIM_JIFFIES;
+	struct list_head *pos, *next;
+
+	spin_lock_bh(&wsm.lock);
+
+	if (list_empty(&wsm.lru_list)) {
+		spin_unlock_bh(&wsm.lock);
+		return;
+	}
+
+	list_for_each_prev_safe(pos, next, &wsm.lru_list) {
+		struct workspace *victim = container_of(pos, struct workspace,
+							lru_list);
+		unsigned int level;
+
+		if (time_after(victim->last_used, reclaim_threshold))
+			break;
+
+		/* workspace is in use */
+		if (victim->req_level)
+			continue;
+
+		level = victim->level;
+		list_del(&victim->lru_list);
+		list_del(&victim->list);
+		zstd_free_workspace(&victim->list);
+
+		if (list_empty(&wsm.idle_ws[level - 1]))
+			clear_bit(level - 1, &wsm.active_map);
+
+	}
+
+	if (!list_empty(&wsm.lru_list))
+		mod_timer(&wsm.timer, jiffies + ZSTD_BTRFS_RECLAIM_JIFFIES);
+
+	spin_unlock_bh(&wsm.lock);
+}
+
+/*
+ * zstd_calc_ws_mem_sizes - calculate monotonic memory bounds
+ *
+ * It is possible based on the level configurations that a higher level
+ * workspace uses less memory than a lower level workspace.  In order to reuse
+ * workspaces, this must be made a monotonic relationship.  This precomputes
+ * the required memory for each level and enforces the monotonicity between
+ * level and memory required.
+ */
+static void zstd_calc_ws_mem_sizes(void)
+{
+	size_t max_size = 0;
+	unsigned int level;
+
+	for (level = 1; level <= ZSTD_BTRFS_MAX_LEVEL; level++) {
+		ZSTD_parameters params =
+			zstd_get_btrfs_parameters(level, ZSTD_BTRFS_MAX_INPUT);
+		size_t level_size =
+			max_t(size_t,
+			      ZSTD_CStreamWorkspaceBound(params.cParams),
+			      ZSTD_DStreamWorkspaceBound(ZSTD_BTRFS_MAX_INPUT));
+
+		max_size = max_t(size_t, max_size, level_size);
+		zstd_ws_mem_sizes[level - 1] = max_size;
+	}
+}
+
+static void zstd_init_workspace_manager(void)
+{
+	struct list_head *ws;
+	int i;
+
+	zstd_calc_ws_mem_sizes();
+
+	wsm.ops = &btrfs_zstd_compress;
+	spin_lock_init(&wsm.lock);
+	init_waitqueue_head(&wsm.wait);
+	timer_setup(&wsm.timer, zstd_reclaim_timer_fn, 0);
+
+	INIT_LIST_HEAD(&wsm.lru_list);
+	for (i = 0; i < ZSTD_BTRFS_MAX_LEVEL; i++)
+		INIT_LIST_HEAD(&wsm.idle_ws[i]);
+
+	ws = zstd_alloc_workspace(ZSTD_BTRFS_MAX_LEVEL);
+	if (IS_ERR(ws)) {
+		pr_warn(
+		"BTRFS: cannot preallocate zstd compression workspace\n");
+	} else {
+		set_bit(ZSTD_BTRFS_MAX_LEVEL - 1, &wsm.active_map);
+		list_add(ws, &wsm.idle_ws[ZSTD_BTRFS_MAX_LEVEL - 1]);
+	}
+}
+
+static void zstd_cleanup_workspace_manager(void)
+{
+	struct workspace *workspace;
+	int i;
+
+	spin_lock_bh(&wsm.lock);
+	for (i = 0; i < ZSTD_BTRFS_MAX_LEVEL; i++) {
+		while (!list_empty(&wsm.idle_ws[i])) {
+			workspace = container_of(wsm.idle_ws[i].next,
+						 struct workspace, list);
+			list_del(&workspace->list);
+			list_del(&workspace->lru_list);
+			zstd_free_workspace(&workspace->list);
+		}
+	}
+	spin_unlock_bh(&wsm.lock);
+
+	del_timer_sync(&wsm.timer);
+}
+
+/*
+ * zstd_find_workspace - find workspace
+ * @level: compression level
+ *
+ * This iterates over the set bits in the active_map beginning at the requested
+ * compression level.  This lets us utilize already allocated workspaces before
+ * allocating a new one.  If the workspace is of a larger size, it is used, but
+ * the place in the lru_list and last_used times are not updated.  This is to
+ * offer the opportunity to reclaim the workspace in favor of allocating an
+ * appropriately sized one in the future.
+ */
+static struct list_head *zstd_find_workspace(unsigned int level)
+{
+	struct list_head *ws;
+	struct workspace *workspace;
+	int i = level - 1;
+
+	spin_lock_bh(&wsm.lock);
+	for_each_set_bit_from(i, &wsm.active_map, ZSTD_BTRFS_MAX_LEVEL) {
+		if (!list_empty(&wsm.idle_ws[i])) {
+			ws = wsm.idle_ws[i].next;
+			workspace = list_to_workspace(ws);
+			list_del_init(ws);
+			/* keep its place if it's a lower level using this */
+			workspace->req_level = level;
+			if (level == workspace->level)
+				list_del(&workspace->lru_list);
+			if (list_empty(&wsm.idle_ws[i]))
+				clear_bit(i, &wsm.active_map);
+			spin_unlock_bh(&wsm.lock);
+			return ws;
+		}
+	}
+	spin_unlock_bh(&wsm.lock);
+
+	return NULL;
+}
+
+/*
+ * zstd_get_workspace - zstd's get_workspace
+ * @level: compression level
+ *
+ * If @level is 0, then any compression level can be used.  Therefore, we begin
+ * scanning from 1.  We first scan through possible workspaces and then after
+ * attempt to allocate a new workspace.  If we fail to allocate one due to
+ * memory pressure, go to sleep waiting for the max level workspace to free up.
+ */
+static struct list_head *zstd_get_workspace(unsigned int level)
+{
+	struct list_head *ws;
+	unsigned int nofs_flag;
+
+	/* level == 0 means we can use any workspace */
+	if (!level)
+		level = 1;
+
+again:
+	ws = zstd_find_workspace(level);
+	if (ws)
+		return ws;
+
+	nofs_flag = memalloc_nofs_save();
+	ws = zstd_alloc_workspace(level);
+	memalloc_nofs_restore(nofs_flag);
+
+	if (IS_ERR(ws)) {
+		DEFINE_WAIT(wait);
+
+		prepare_to_wait(&wsm.wait, &wait, TASK_UNINTERRUPTIBLE);
+		schedule();
+		finish_wait(&wsm.wait, &wait);
+
+		goto again;
+	}
+
+	return ws;
+}
+
+/*
+ * zstd_put_workspace - zstd put_workspace
+ * @ws: list_head for the workspace
+ *
+ * When putting back a workspace, we only need to update the LRU if we are of
+ * the requested compression level.  Here is where we continue to protect the
+ * max level workspace or update last_used accordingly.  If the reclaim timer
+ * isn't set, it is also set here.  Only the max level workspace tries and wakes
+ * up waiting workspaces.
+ */
+static void zstd_put_workspace(struct list_head *ws)
+{
+	struct workspace *workspace = list_to_workspace(ws);
+
+	spin_lock_bh(&wsm.lock);
+
+	/* A node is only taken off the lru if we are the corresponding level */
+	if (workspace->req_level == workspace->level) {
+		/* Hide a max level workspace from reclaim */
+		if (list_empty(&wsm.idle_ws[ZSTD_BTRFS_MAX_LEVEL - 1])) {
+			INIT_LIST_HEAD(&workspace->lru_list);
+		} else {
+			workspace->last_used = jiffies;
+			list_add(&workspace->lru_list, &wsm.lru_list);
+			if (!timer_pending(&wsm.timer))
+				mod_timer(&wsm.timer,
+					  jiffies + ZSTD_BTRFS_RECLAIM_JIFFIES);
+		}
+	}
+
+	set_bit(workspace->level - 1, &wsm.active_map);
+	list_add(&workspace->list, &wsm.idle_ws[workspace->level - 1]);
+	workspace->req_level = 0;
+
+	spin_unlock_bh(&wsm.lock);
+
+	if (workspace->level == ZSTD_BTRFS_MAX_LEVEL)
+		cond_wake_up(&wsm.wait);
+}
+
 static void zstd_free_workspace(struct list_head *ws)
 {
 	struct workspace *workspace = list_entry(ws, struct workspace, list);
@@ -50,25 +340,25 @@ static void zstd_free_workspace(struct list_head *ws)
 	kfree(workspace);
 }
 
-static struct list_head *zstd_alloc_workspace(void)
+static struct list_head *zstd_alloc_workspace(unsigned int level)
 {
-	ZSTD_parameters params =
-			zstd_get_btrfs_parameters(ZSTD_BTRFS_MAX_INPUT);
 	struct workspace *workspace;
 
 	workspace = kzalloc(sizeof(*workspace), GFP_KERNEL);
 	if (!workspace)
 		return ERR_PTR(-ENOMEM);
 
-	workspace->size = max_t(size_t,
-			ZSTD_CStreamWorkspaceBound(params.cParams),
-			ZSTD_DStreamWorkspaceBound(ZSTD_BTRFS_MAX_INPUT));
+	workspace->size = zstd_ws_mem_sizes[level - 1];
+	workspace->level = level;
+	workspace->req_level = level;
+	workspace->last_used = jiffies;
 	workspace->mem = kvmalloc(workspace->size, GFP_KERNEL);
 	workspace->buf = kmalloc(PAGE_SIZE, GFP_KERNEL);
 	if (!workspace->mem || !workspace->buf)
 		goto fail;
 
 	INIT_LIST_HEAD(&workspace->list);
+	INIT_LIST_HEAD(&workspace->lru_list);
 
 	return &workspace->list;
 fail:
@@ -95,7 +385,8 @@ static int zstd_compress_pages(struct list_head *ws,
 	unsigned long len = *total_out;
 	const unsigned long nr_dest_pages = *out_pages;
 	unsigned long max_out = nr_dest_pages * PAGE_SIZE;
-	ZSTD_parameters params = zstd_get_btrfs_parameters(len);
+	ZSTD_parameters params = zstd_get_btrfs_parameters(workspace->req_level,
+							   len);
 
 	*out_pages = 0;
 	*total_out = 0;
@@ -419,11 +710,19 @@ finish:
 	return ret;
 }
 
-static void zstd_set_level(struct list_head *ws, unsigned int type)
+static unsigned int zstd_set_level(unsigned int level)
 {
+	if (!level)
+		return ZSTD_BTRFS_DEFAULT_LEVEL;
+
+	return min_t(unsigned int, level, ZSTD_BTRFS_MAX_LEVEL);
 }
 
 const struct btrfs_compress_op btrfs_zstd_compress = {
+	.init_workspace_manager = zstd_init_workspace_manager,
+	.cleanup_workspace_manager = zstd_cleanup_workspace_manager,
+	.get_workspace = zstd_get_workspace,
+	.put_workspace = zstd_put_workspace,
 	.alloc_workspace = zstd_alloc_workspace,
 	.free_workspace = zstd_free_workspace,
 	.compress_pages = zstd_compress_pages,
diff --git a/fs/buffer.c b/fs/buffer.c
index 48318fb74938..49a871570092 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/buffer.c
  *
@@ -2085,40 +2086,6 @@ int block_write_begin(struct address_space *mapping, loff_t pos, unsigned len,
 }
 EXPORT_SYMBOL(block_write_begin);
 
-int __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
-		struct page *page)
-{
-	loff_t old_size = inode->i_size;
-	bool i_size_changed = false;
-
-	/*
-	 * No need to use i_size_read() here, the i_size cannot change under us
-	 * because we hold i_rwsem.
-	 *
-	 * But it's important to update i_size while still holding page lock:
-	 * page writeout could otherwise come in and zero beyond i_size.
-	 */
-	if (pos + copied > inode->i_size) {
-		i_size_write(inode, pos + copied);
-		i_size_changed = true;
-	}
-
-	unlock_page(page);
-	put_page(page);
-
-	if (old_size < pos)
-		pagecache_isize_extended(inode, old_size, pos);
-	/*
-	 * Don't mark the inode dirty under page lock. First, it unnecessarily
-	 * makes the holding time of page lock longer. Second, it forces lock
-	 * ordering of page lock and transaction start for journaling
-	 * filesystems.
-	 */
-	if (i_size_changed)
-		mark_inode_dirty(inode);
-	return copied;
-}
-
 int block_write_end(struct file *file, struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned copied,
 			struct page *page, void *fsdata)
@@ -2159,8 +2126,38 @@ int generic_write_end(struct file *file, struct address_space *mapping,
 			loff_t pos, unsigned len, unsigned copied,
 			struct page *page, void *fsdata)
 {
+	struct inode *inode = mapping->host;
+	loff_t old_size = inode->i_size;
+	bool i_size_changed = false;
+
 	copied = block_write_end(file, mapping, pos, len, copied, page, fsdata);
-	return __generic_write_end(mapping->host, pos, copied, page);
+
+	/*
+	 * No need to use i_size_read() here, the i_size cannot change under us
+	 * because we hold i_rwsem.
+	 *
+	 * But it's important to update i_size while still holding page lock:
+	 * page writeout could otherwise come in and zero beyond i_size.
+	 */
+	if (pos + copied > inode->i_size) {
+		i_size_write(inode, pos + copied);
+		i_size_changed = true;
+	}
+
+	unlock_page(page);
+	put_page(page);
+
+	if (old_size < pos)
+		pagecache_isize_extended(inode, old_size, pos);
+	/*
+	 * Don't mark the inode dirty under page lock. First, it unnecessarily
+	 * makes the holding time of page lock longer. Second, it forces lock
+	 * ordering of page lock and transaction start for journaling
+	 * filesystems.
+	 */
+	if (i_size_changed)
+		mark_inode_dirty(inode);
+	return copied;
 }
 EXPORT_SYMBOL(generic_write_end);
 
@@ -3027,13 +3024,23 @@ void guard_bio_eod(int op, struct bio *bio)
 	/* Uhhuh. We've got a bio that straddles the device size! */
 	truncated_bytes = bio->bi_iter.bi_size - (maxsector << 9);
 
+	/*
+	 * The bio contains more than one segment which spans EOD, just return
+	 * and let IO layer turn it into an EIO
+	 */
+	if (truncated_bytes > bvec->bv_len)
+		return;
+
 	/* Truncate the bio.. */
 	bio->bi_iter.bi_size -= truncated_bytes;
 	bvec->bv_len -= truncated_bytes;
 
 	/* ..and clear the end of the buffer for reads */
 	if (op == REQ_OP_READ) {
-		zero_user(bvec->bv_page, bvec->bv_offset + bvec->bv_len,
+		struct bio_vec bv;
+
+		mp_bvec_last_segment(bvec, &bv);
+		zero_user(bv.bv_page, bv.bv_offset + bv.bv_len,
 				truncated_bytes);
 	}
 }
diff --git a/fs/cachefiles/Kconfig b/fs/cachefiles/Kconfig
index 80e9c6167f0b..ae559ed5b3b3 100644
--- a/fs/cachefiles/Kconfig
+++ b/fs/cachefiles/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 
 config CACHEFILES
 	tristate "Filesystem caching on files"
diff --git a/fs/cachefiles/bind.c b/fs/cachefiles/bind.c
index 4a717d400807..dfb14dbddf51 100644
--- a/fs/cachefiles/bind.c
+++ b/fs/cachefiles/bind.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Bind and unbind a cache from the filesystem backing it
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/fs/cachefiles/daemon.c b/fs/cachefiles/daemon.c
index 3fdee214a5bb..752c1e43416f 100644
--- a/fs/cachefiles/daemon.c
+++ b/fs/cachefiles/daemon.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Daemon interface
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c
index 222bc5d8b62c..4cea5fbf695e 100644
--- a/fs/cachefiles/interface.c
+++ b/fs/cachefiles/interface.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* FS-Cache interface to CacheFiles
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/slab.h>
diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h
index d2f6f996e65a..cf9bd6401c2d 100644
--- a/fs/cachefiles/internal.h
+++ b/fs/cachefiles/internal.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* General netfs cache on cache files internal defs
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #ifdef pr_fmt
diff --git a/fs/cachefiles/key.c b/fs/cachefiles/key.c
index 33b58c60f2d1..be96f5fc5cac 100644
--- a/fs/cachefiles/key.c
+++ b/fs/cachefiles/key.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Key to pathname encoder
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/slab.h>
diff --git a/fs/cachefiles/main.c b/fs/cachefiles/main.c
index f54d3f5b2e40..ddf0cd58d60c 100644
--- a/fs/cachefiles/main.c
+++ b/fs/cachefiles/main.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Network filesystem caching backend to use cache files on a premounted
  * filesystem
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/fs/cachefiles/namei.c b/fs/cachefiles/namei.c
index 1645fcfd9691..ecc8ecbbfa5a 100644
--- a/fs/cachefiles/namei.c
+++ b/fs/cachefiles/namei.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* CacheFiles path walking and related routines
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/module.h>
@@ -20,7 +16,6 @@
 #include <linux/namei.h>
 #include <linux/security.h>
 #include <linux/slab.h>
-#include <linux/xattr.h>
 #include "internal.h"
 
 #define CACHEFILES_KEYBUF_SIZE 512
diff --git a/fs/cachefiles/proc.c b/fs/cachefiles/proc.c
index 0ce1aa56b67f..6e67aea0f24e 100644
--- a/fs/cachefiles/proc.c
+++ b/fs/cachefiles/proc.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* CacheFiles statistics
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 8a577409d030..44a3ce1e4ce4 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Storage object read/write
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/mount.h>
diff --git a/fs/cachefiles/security.c b/fs/cachefiles/security.c
index 31bbc0528b11..aec13fd94692 100644
--- a/fs/cachefiles/security.c
+++ b/fs/cachefiles/security.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* CacheFiles security management
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/fs.h>
diff --git a/fs/cachefiles/xattr.c b/fs/cachefiles/xattr.c
index 511e6c68156a..72e42438f3d7 100644
--- a/fs/cachefiles/xattr.c
+++ b/fs/cachefiles/xattr.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* CacheFiles extended attribute management
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/fs/ceph/Kconfig b/fs/ceph/Kconfig
index 52095f473464..7f7d92d6b024 100644
--- a/fs/ceph/Kconfig
+++ b/fs/ceph/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config CEPH_FS
 	tristate "Ceph distributed file system"
 	depends on INET
diff --git a/fs/ceph/acl.c b/fs/ceph/acl.c
index 5f0103f40079..8a19c249036c 100644
--- a/fs/ceph/acl.c
+++ b/fs/ceph/acl.c
@@ -1,21 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/ceph/acl.c
  *
  * Copyright (C) 2013 Guangliang Zhao, <lucienchao@gmail.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License v2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/ceph/ceph_debug.h>
diff --git a/fs/ceph/cache.c b/fs/ceph/cache.c
index 1bf3502bdd6f..bc90cf6ad7ed 100644
--- a/fs/ceph/cache.c
+++ b/fs/ceph/cache.c
@@ -1,24 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Ceph cache definitions.
  *
  *  Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
  *  Written by Milosz Tanski (milosz@adfin.com)
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #include "super.h"
diff --git a/fs/ceph/cache.h b/fs/ceph/cache.h
index 7e72c7594f0c..e486fac3434d 100644
--- a/fs/ceph/cache.h
+++ b/fs/ceph/cache.h
@@ -1,24 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Ceph cache definitions.
  *
  *  Copyright (C) 2013 by Adfin Solutions, Inc. All Rights Reserved.
  *  Written by Milosz Tanski (milosz@adfin.com)
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2
- *  as published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to:
- *  Free Software Foundation
- *  51 Franklin Street, Fifth Floor
- *  Boston, MA  02111-1301  USA
- *
  */
 
 #ifndef _CEPH_CACHE_H
diff --git a/fs/ceph/caps.c b/fs/ceph/caps.c
index bba28a5034ba..0176241eaea7 100644
--- a/fs/ceph/caps.c
+++ b/fs/ceph/caps.c
@@ -148,11 +148,17 @@ void ceph_caps_finalize(struct ceph_mds_client *mdsc)
 	spin_unlock(&mdsc->caps_list_lock);
 }
 
-void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta)
+void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc,
+			      struct ceph_mount_options *fsopt)
 {
 	spin_lock(&mdsc->caps_list_lock);
-	mdsc->caps_min_count += delta;
-	BUG_ON(mdsc->caps_min_count < 0);
+	mdsc->caps_min_count = fsopt->max_readdir;
+	if (mdsc->caps_min_count < 1024)
+		mdsc->caps_min_count = 1024;
+	mdsc->caps_use_max = fsopt->caps_max;
+	if (mdsc->caps_use_max > 0 &&
+	    mdsc->caps_use_max < mdsc->caps_min_count)
+		mdsc->caps_use_max = mdsc->caps_min_count;
 	spin_unlock(&mdsc->caps_list_lock);
 }
 
@@ -272,6 +278,7 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc,
 	if (!err) {
 		BUG_ON(have + alloc != need);
 		ctx->count = need;
+		ctx->used = 0;
 	}
 
 	spin_lock(&mdsc->caps_list_lock);
@@ -295,13 +302,24 @@ int ceph_reserve_caps(struct ceph_mds_client *mdsc,
 }
 
 void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
-			struct ceph_cap_reservation *ctx)
+			 struct ceph_cap_reservation *ctx)
 {
+	bool reclaim = false;
+	if (!ctx->count)
+		return;
+
 	dout("unreserve caps ctx=%p count=%d\n", ctx, ctx->count);
 	spin_lock(&mdsc->caps_list_lock);
 	__ceph_unreserve_caps(mdsc, ctx->count);
 	ctx->count = 0;
+
+	if (mdsc->caps_use_max > 0 &&
+	    mdsc->caps_use_count > mdsc->caps_use_max)
+		reclaim = true;
 	spin_unlock(&mdsc->caps_list_lock);
+
+	if (reclaim)
+		ceph_reclaim_caps_nr(mdsc, ctx->used);
 }
 
 struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
@@ -346,6 +364,7 @@ struct ceph_cap *ceph_get_cap(struct ceph_mds_client *mdsc,
 	BUG_ON(list_empty(&mdsc->caps_list));
 
 	ctx->count--;
+	ctx->used++;
 	mdsc->caps_reserve_count--;
 	mdsc->caps_use_count++;
 
@@ -500,12 +519,12 @@ static void __insert_cap_node(struct ceph_inode_info *ci,
 static void __cap_set_timeouts(struct ceph_mds_client *mdsc,
 			       struct ceph_inode_info *ci)
 {
-	struct ceph_mount_options *ma = mdsc->fsc->mount_options;
+	struct ceph_mount_options *opt = mdsc->fsc->mount_options;
 
 	ci->i_hold_caps_min = round_jiffies(jiffies +
-					    ma->caps_wanted_delay_min * HZ);
+					    opt->caps_wanted_delay_min * HZ);
 	ci->i_hold_caps_max = round_jiffies(jiffies +
-					    ma->caps_wanted_delay_max * HZ);
+					    opt->caps_wanted_delay_max * HZ);
 	dout("__cap_set_timeouts %p min %lu max %lu\n", &ci->vfs_inode,
 	     ci->i_hold_caps_min - jiffies, ci->i_hold_caps_max - jiffies);
 }
@@ -657,6 +676,10 @@ void ceph_add_cap(struct inode *inode,
 		session->s_nr_caps++;
 		spin_unlock(&session->s_cap_lock);
 	} else {
+		spin_lock(&session->s_cap_lock);
+		list_move_tail(&cap->session_caps, &session->s_caps);
+		spin_unlock(&session->s_cap_lock);
+
 		if (cap->cap_gen < session->s_cap_gen)
 			cap->issued = cap->implemented = CEPH_CAP_PIN;
 
@@ -869,8 +892,8 @@ int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch)
 	int have = ci->i_snap_caps;
 
 	if ((have & mask) == mask) {
-		dout("__ceph_caps_issued_mask %p snap issued %s"
-		     " (mask %s)\n", &ci->vfs_inode,
+		dout("__ceph_caps_issued_mask ino 0x%lx snap issued %s"
+		     " (mask %s)\n", ci->vfs_inode.i_ino,
 		     ceph_cap_string(have),
 		     ceph_cap_string(mask));
 		return 1;
@@ -881,8 +904,8 @@ int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch)
 		if (!__cap_is_valid(cap))
 			continue;
 		if ((cap->issued & mask) == mask) {
-			dout("__ceph_caps_issued_mask %p cap %p issued %s"
-			     " (mask %s)\n", &ci->vfs_inode, cap,
+			dout("__ceph_caps_issued_mask ino 0x%lx cap %p issued %s"
+			     " (mask %s)\n", ci->vfs_inode.i_ino, cap,
 			     ceph_cap_string(cap->issued),
 			     ceph_cap_string(mask));
 			if (touch)
@@ -893,8 +916,8 @@ int __ceph_caps_issued_mask(struct ceph_inode_info *ci, int mask, int touch)
 		/* does a combination of caps satisfy mask? */
 		have |= cap->issued;
 		if ((have & mask) == mask) {
-			dout("__ceph_caps_issued_mask %p combo issued %s"
-			     " (mask %s)\n", &ci->vfs_inode,
+			dout("__ceph_caps_issued_mask ino 0x%lx combo issued %s"
+			     " (mask %s)\n", ci->vfs_inode.i_ino,
 			     ceph_cap_string(cap->issued),
 			     ceph_cap_string(mask));
 			if (touch) {
@@ -1081,9 +1104,7 @@ void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release)
 	    (!session->s_cap_reconnect || cap->cap_gen == session->s_cap_gen)) {
 		cap->queue_release = 1;
 		if (removed) {
-			list_add_tail(&cap->session_caps,
-				      &session->s_cap_releases);
-			session->s_num_cap_releases++;
+			__ceph_queue_cap_release(session, cap);
 			removed = 0;
 		}
 	} else {
@@ -1245,7 +1266,7 @@ static int send_cap_msg(struct cap_msg_args *arg)
  * Queue cap releases when an inode is dropped from our cache.  Since
  * inode is about to be destroyed, there is no need for i_ceph_lock.
  */
-void ceph_queue_caps_release(struct inode *inode)
+void __ceph_remove_caps(struct inode *inode)
 {
 	struct ceph_inode_info *ci = ceph_inode(inode);
 	struct rb_node *p;
@@ -2236,8 +2257,6 @@ int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 	if (datasync)
 		goto out;
 
-	inode_lock(inode);
-
 	dirty = try_flush_caps(inode, &flush_tid);
 	dout("fsync dirty caps are %s\n", ceph_cap_string(dirty));
 
@@ -2252,7 +2271,6 @@ int ceph_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 		ret = wait_event_interruptible(ci->i_cap_wq,
 					caps_are_flushed(inode, flush_tid));
 	}
-	inode_unlock(inode);
 out:
 	dout("fsync %p%s result=%d\n", inode, datasync ? " datasync" : "", ret);
 	return ret;
@@ -2393,6 +2411,12 @@ void ceph_early_kick_flushing_caps(struct ceph_mds_client *mdsc,
 		if ((cap->issued & ci->i_flushing_caps) !=
 		    ci->i_flushing_caps) {
 			ci->i_ceph_flags &= ~CEPH_I_KICK_FLUSH;
+			/* encode_caps_cb() also will reset these sequence
+			 * numbers. make sure sequence numbers in cap flush
+			 * message match later reconnect message */
+			cap->seq = 0;
+			cap->issue_seq = 0;
+			cap->mseq = 0;
 			__kick_flushing_caps(mdsc, session, ci,
 					     oldest_flush_tid);
 		} else {
@@ -2501,9 +2525,14 @@ static void __take_cap_refs(struct ceph_inode_info *ci, int got,
  * to (when applicable), and check against max_size here as well.
  * Note that caller is responsible for ensuring max_size increases are
  * requested from the MDS.
+ *
+ * Returns 0 if caps were not able to be acquired (yet), a 1 if they were,
+ * or a negative error code.
+ *
+ * FIXME: how does a 0 return differ from -EAGAIN?
  */
 static int try_get_cap_refs(struct ceph_inode_info *ci, int need, int want,
-			    loff_t endoff, bool nonblock, int *got, int *err)
+			    loff_t endoff, bool nonblock, int *got)
 {
 	struct inode *inode = &ci->vfs_inode;
 	struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
@@ -2523,8 +2552,7 @@ again:
 	if ((file_wanted & need) != need) {
 		dout("try_get_cap_refs need %s file_wanted %s, EBADF\n",
 		     ceph_cap_string(need), ceph_cap_string(file_wanted));
-		*err = -EBADF;
-		ret = 1;
+		ret = -EBADF;
 		goto out_unlock;
 	}
 
@@ -2545,10 +2573,8 @@ again:
 		if (endoff >= 0 && endoff > (loff_t)ci->i_max_size) {
 			dout("get_cap_refs %p endoff %llu > maxsize %llu\n",
 			     inode, endoff, ci->i_max_size);
-			if (endoff > ci->i_requested_max_size) {
-				*err = -EAGAIN;
-				ret = 1;
-			}
+			if (endoff > ci->i_requested_max_size)
+				ret = -EAGAIN;
 			goto out_unlock;
 		}
 		/*
@@ -2583,8 +2609,7 @@ again:
 					 * task isn't in TASK_RUNNING state
 					 */
 					if (nonblock) {
-						*err = -EAGAIN;
-						ret = 1;
+						ret = -EAGAIN;
 						goto out_unlock;
 					}
 
@@ -2613,8 +2638,7 @@ again:
 		if (session_readonly) {
 			dout("get_cap_refs %p needed %s but mds%d readonly\n",
 			     inode, ceph_cap_string(need), ci->i_auth_cap->mds);
-			*err = -EROFS;
-			ret = 1;
+			ret = -EROFS;
 			goto out_unlock;
 		}
 
@@ -2623,16 +2647,14 @@ again:
 			if (READ_ONCE(mdsc->fsc->mount_state) ==
 			    CEPH_MOUNT_SHUTDOWN) {
 				dout("get_cap_refs %p forced umount\n", inode);
-				*err = -EIO;
-				ret = 1;
+				ret = -EIO;
 				goto out_unlock;
 			}
 			mds_wanted = __ceph_caps_mds_wanted(ci, false);
 			if (need & ~(mds_wanted & need)) {
 				dout("get_cap_refs %p caps were dropped"
 				     " (session killed?)\n", inode);
-				*err = -ESTALE;
-				ret = 1;
+				ret = -ESTALE;
 				goto out_unlock;
 			}
 			if (!(file_wanted & ~mds_wanted))
@@ -2683,7 +2705,7 @@ static void check_max_size(struct inode *inode, loff_t endoff)
 int ceph_try_get_caps(struct ceph_inode_info *ci, int need, int want,
 		      bool nonblock, int *got)
 {
-	int ret, err = 0;
+	int ret;
 
 	BUG_ON(need & ~CEPH_CAP_FILE_RD);
 	BUG_ON(want & ~(CEPH_CAP_FILE_CACHE|CEPH_CAP_FILE_LAZYIO|CEPH_CAP_FILE_SHARED));
@@ -2691,15 +2713,8 @@ int ceph_try_get_caps(struct ceph_inode_info *ci, int need, int want,
 	if (ret < 0)
 		return ret;
 
-	ret = try_get_cap_refs(ci, need, want, 0, nonblock, got, &err);
-	if (ret) {
-		if (err == -EAGAIN) {
-			ret = 0;
-		} else if (err < 0) {
-			ret = err;
-		}
-	}
-	return ret;
+	ret = try_get_cap_refs(ci, need, want, 0, nonblock, got);
+	return ret == -EAGAIN ? 0 : ret;
 }
 
 /*
@@ -2710,7 +2725,7 @@ int ceph_try_get_caps(struct ceph_inode_info *ci, int need, int want,
 int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
 		  loff_t endoff, int *got, struct page **pinned_page)
 {
-	int _got, ret, err = 0;
+	int _got, ret;
 
 	ret = ceph_pool_perm_check(ci, need);
 	if (ret < 0)
@@ -2720,21 +2735,17 @@ int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
 		if (endoff > 0)
 			check_max_size(&ci->vfs_inode, endoff);
 
-		err = 0;
 		_got = 0;
 		ret = try_get_cap_refs(ci, need, want, endoff,
-				       false, &_got, &err);
-		if (ret) {
-			if (err == -EAGAIN)
-				continue;
-			if (err < 0)
-				ret = err;
-		} else {
+				       false, &_got);
+		if (ret == -EAGAIN)
+			continue;
+		if (!ret) {
 			DEFINE_WAIT_FUNC(wait, woken_wake_function);
 			add_wait_queue(&ci->i_cap_wq, &wait);
 
-			while (!try_get_cap_refs(ci, need, want, endoff,
-						 true, &_got, &err)) {
+			while (!(ret = try_get_cap_refs(ci, need, want, endoff,
+							true, &_got))) {
 				if (signal_pending(current)) {
 					ret = -ERESTARTSYS;
 					break;
@@ -2743,14 +2754,11 @@ int ceph_get_caps(struct ceph_inode_info *ci, int need, int want,
 			}
 
 			remove_wait_queue(&ci->i_cap_wq, &wait);
-
-			if (err == -EAGAIN)
+			if (ret == -EAGAIN)
 				continue;
-			if (err < 0)
-				ret = err;
 		}
 		if (ret < 0) {
-			if (err == -ESTALE) {
+			if (ret == -ESTALE) {
 				/* session was killed, try renew caps */
 				ret = ceph_renew_caps(&ci->vfs_inode);
 				if (ret == 0)
@@ -2984,8 +2992,10 @@ void ceph_put_wrbuffer_cap_refs(struct ceph_inode_info *ci, int nr,
 	}
 	if (complete_capsnap)
 		wake_up_all(&ci->i_cap_wq);
-	while (put-- > 0)
-		iput(inode);
+	while (put-- > 0) {
+		/* avoid calling iput_final() in osd dispatch threads */
+		ceph_async_iput(inode);
+	}
 }
 
 /*
@@ -3880,12 +3890,10 @@ void ceph_handle_caps(struct ceph_mds_session *session,
 			cap->seq = seq;
 			cap->issue_seq = seq;
 			spin_lock(&session->s_cap_lock);
-			list_add_tail(&cap->session_caps,
-					&session->s_cap_releases);
-			session->s_num_cap_releases++;
+			__ceph_queue_cap_release(session, cap);
 			spin_unlock(&session->s_cap_lock);
 		}
-		goto flush_cap_releases;
+		goto done;
 	}
 
 	/* these will work even if we don't have a cap yet */
@@ -3955,7 +3963,13 @@ void ceph_handle_caps(struct ceph_mds_session *session,
 		       ceph_cap_op_name(op));
 	}
 
-	goto done;
+done:
+	mutex_unlock(&session->s_mutex);
+done_unlocked:
+	ceph_put_string(extra_info.pool_ns);
+	/* avoid calling iput_final() in mds dispatch threads */
+	ceph_async_iput(inode);
+	return;
 
 flush_cap_releases:
 	/*
@@ -3963,14 +3977,8 @@ flush_cap_releases:
 	 * along for the mds (who clearly thinks we still have this
 	 * cap).
 	 */
-	ceph_send_cap_releases(mdsc, session);
-
-done:
-	mutex_unlock(&session->s_mutex);
-done_unlocked:
-	iput(inode);
-	ceph_put_string(extra_info.pool_ns);
-	return;
+	ceph_flush_cap_releases(mdsc, session);
+	goto done;
 
 bad:
 	pr_err("ceph_handle_caps: corrupt message\n");
@@ -4006,7 +4014,8 @@ void ceph_check_delayed_caps(struct ceph_mds_client *mdsc)
 		if (inode) {
 			dout("check_delayed_caps on %p\n", inode);
 			ceph_check_caps(ci, flags, NULL);
-			iput(inode);
+			/* avoid calling iput_final() in tick thread */
+			ceph_async_iput(inode);
 		}
 	}
 	spin_unlock(&mdsc->cap_delay_lock);
@@ -4075,7 +4084,7 @@ void ceph_put_fmode(struct ceph_inode_info *ci, int fmode)
 }
 
 /*
- * For a soon-to-be unlinked file, drop the AUTH_RDCACHE caps. If it
+ * For a soon-to-be unlinked file, drop the LINK caps. If it
  * looks like the link count will hit 0, drop any other caps (other
  * than PIN) we don't specifically want (due to the file still being
  * open).
diff --git a/fs/ceph/debugfs.c b/fs/ceph/debugfs.c
index abdf98deeec4..83cd41fa2b01 100644
--- a/fs/ceph/debugfs.c
+++ b/fs/ceph/debugfs.c
@@ -37,7 +37,7 @@ static int mdsmap_show(struct seq_file *s, void *p)
 		struct ceph_entity_addr *addr = &mdsmap->m_info[i].addr;
 		int state = mdsmap->m_info[i].state;
 		seq_printf(s, "\tmds%d\t%s\t(%s)\n", i,
-			       ceph_pr_addr(&addr->in_addr),
+			       ceph_pr_addr(addr),
 			       ceph_mds_state_name(state));
 	}
 	return 0;
@@ -88,7 +88,7 @@ static int mdsc_show(struct seq_file *s, void *p)
 				   req->r_dentry,
 				   path ? path : "");
 			spin_unlock(&req->r_dentry->d_lock);
-			kfree(path);
+			ceph_mdsc_free_path(path, pathlen);
 		} else if (req->r_path1) {
 			seq_printf(s, " #%llx/%s", req->r_ino1.ino,
 				   req->r_path1);
@@ -108,7 +108,7 @@ static int mdsc_show(struct seq_file *s, void *p)
 				   req->r_old_dentry,
 				   path ? path : "");
 			spin_unlock(&req->r_old_dentry->d_lock);
-			kfree(path);
+			ceph_mdsc_free_path(path, pathlen);
 		} else if (req->r_path2 && req->r_op != CEPH_MDS_OP_SYMLINK) {
 			if (req->r_ino2.ino)
 				seq_printf(s, " #%llx/%s", req->r_ino2.ino,
@@ -124,34 +124,47 @@ static int mdsc_show(struct seq_file *s, void *p)
 	return 0;
 }
 
+static int caps_show_cb(struct inode *inode, struct ceph_cap *cap, void *p)
+{
+	struct seq_file *s = p;
+
+	seq_printf(s, "0x%-17lx%-17s%-17s\n", inode->i_ino,
+		   ceph_cap_string(cap->issued),
+		   ceph_cap_string(cap->implemented));
+	return 0;
+}
+
 static int caps_show(struct seq_file *s, void *p)
 {
 	struct ceph_fs_client *fsc = s->private;
-	int total, avail, used, reserved, min;
+	struct ceph_mds_client *mdsc = fsc->mdsc;
+	int total, avail, used, reserved, min, i;
 
 	ceph_reservation_status(fsc, &total, &avail, &used, &reserved, &min);
 	seq_printf(s, "total\t\t%d\n"
 		   "avail\t\t%d\n"
 		   "used\t\t%d\n"
 		   "reserved\t%d\n"
-		   "min\t%d\n",
+		   "min\t\t%d\n\n",
 		   total, avail, used, reserved, min);
-	return 0;
-}
+	seq_printf(s, "ino                issued           implemented\n");
+	seq_printf(s, "-----------------------------------------------\n");
 
-static int dentry_lru_show(struct seq_file *s, void *ptr)
-{
-	struct ceph_fs_client *fsc = s->private;
-	struct ceph_mds_client *mdsc = fsc->mdsc;
-	struct ceph_dentry_info *di;
+	mutex_lock(&mdsc->mutex);
+	for (i = 0; i < mdsc->max_sessions; i++) {
+		struct ceph_mds_session *session;
 
-	spin_lock(&mdsc->dentry_lru_lock);
-	list_for_each_entry(di, &mdsc->dentry_lru, lru) {
-		struct dentry *dentry = di->dentry;
-		seq_printf(s, "%p %p\t%pd\n",
-			   di, dentry, dentry);
+		session = __ceph_lookup_mds_session(mdsc, i);
+		if (!session)
+			continue;
+		mutex_unlock(&mdsc->mutex);
+		mutex_lock(&session->s_mutex);
+		ceph_iterate_session_caps(session, caps_show_cb, s);
+		mutex_unlock(&session->s_mutex);
+		ceph_put_mds_session(session);
+		mutex_lock(&mdsc->mutex);
 	}
-	spin_unlock(&mdsc->dentry_lru_lock);
+	mutex_unlock(&mdsc->mutex);
 
 	return 0;
 }
@@ -195,7 +208,6 @@ static int mds_sessions_show(struct seq_file *s, void *ptr)
 CEPH_DEFINE_SHOW_FUNC(mdsmap_show)
 CEPH_DEFINE_SHOW_FUNC(mdsc_show)
 CEPH_DEFINE_SHOW_FUNC(caps_show)
-CEPH_DEFINE_SHOW_FUNC(dentry_lru_show)
 CEPH_DEFINE_SHOW_FUNC(mds_sessions_show)
 
 
@@ -231,24 +243,19 @@ void ceph_fs_debugfs_cleanup(struct ceph_fs_client *fsc)
 	debugfs_remove(fsc->debugfs_mds_sessions);
 	debugfs_remove(fsc->debugfs_caps);
 	debugfs_remove(fsc->debugfs_mdsc);
-	debugfs_remove(fsc->debugfs_dentry_lru);
 }
 
-int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
+void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 {
 	char name[100];
-	int err = -ENOMEM;
 
 	dout("ceph_fs_debugfs_init\n");
-	BUG_ON(!fsc->client->debugfs_dir);
 	fsc->debugfs_congestion_kb =
 		debugfs_create_file("writeback_congestion_kb",
 				    0600,
 				    fsc->client->debugfs_dir,
 				    fsc,
 				    &congestion_kb_fops);
-	if (!fsc->debugfs_congestion_kb)
-		goto out;
 
 	snprintf(name, sizeof(name), "../../bdi/%s",
 		 dev_name(fsc->sb->s_bdi->dev));
@@ -256,60 +263,36 @@ int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 		debugfs_create_symlink("bdi",
 				       fsc->client->debugfs_dir,
 				       name);
-	if (!fsc->debugfs_bdi)
-		goto out;
 
 	fsc->debugfs_mdsmap = debugfs_create_file("mdsmap",
 					0400,
 					fsc->client->debugfs_dir,
 					fsc,
 					&mdsmap_show_fops);
-	if (!fsc->debugfs_mdsmap)
-		goto out;
 
 	fsc->debugfs_mds_sessions = debugfs_create_file("mds_sessions",
 					0400,
 					fsc->client->debugfs_dir,
 					fsc,
 					&mds_sessions_show_fops);
-	if (!fsc->debugfs_mds_sessions)
-		goto out;
 
 	fsc->debugfs_mdsc = debugfs_create_file("mdsc",
 						0400,
 						fsc->client->debugfs_dir,
 						fsc,
 						&mdsc_show_fops);
-	if (!fsc->debugfs_mdsc)
-		goto out;
 
 	fsc->debugfs_caps = debugfs_create_file("caps",
 						   0400,
 						   fsc->client->debugfs_dir,
 						   fsc,
 						   &caps_show_fops);
-	if (!fsc->debugfs_caps)
-		goto out;
-
-	fsc->debugfs_dentry_lru = debugfs_create_file("dentry_lru",
-					0400,
-					fsc->client->debugfs_dir,
-					fsc,
-					&dentry_lru_show_fops);
-	if (!fsc->debugfs_dentry_lru)
-		goto out;
-
-	return 0;
-
-out:
-	ceph_fs_debugfs_cleanup(fsc);
-	return err;
 }
 
 
 #else  /* CONFIG_DEBUG_FS */
 
-int ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
+void ceph_fs_debugfs_init(struct ceph_fs_client *fsc)
 {
 	return 0;
 }
diff --git a/fs/ceph/dir.c b/fs/ceph/dir.c
index 82928cea0209..0637149fb9f9 100644
--- a/fs/ceph/dir.c
+++ b/fs/ceph/dir.c
@@ -29,6 +29,9 @@
 
 const struct dentry_operations ceph_dentry_ops;
 
+static bool __dentry_lease_is_valid(struct ceph_dentry_info *di);
+static int __dir_lease_try_check(const struct dentry *dentry);
+
 /*
  * Initialize ceph dentry state.
  */
@@ -44,7 +47,7 @@ static int ceph_d_init(struct dentry *dentry)
 	di->lease_session = NULL;
 	di->time = jiffies;
 	dentry->d_fsdata = di;
-	ceph_dentry_lru_add(dentry);
+	INIT_LIST_HEAD(&di->lease_list);
 	return 0;
 }
 
@@ -241,6 +244,7 @@ static int __dcache_readdir(struct file *file,  struct dir_context *ctx,
 			goto out;
 		}
 		if (fpos_cmp(ctx->pos, di->offset) <= 0) {
+			__ceph_dentry_dir_lease_touch(di);
 			emit_dentry = true;
 		}
 		spin_unlock(&dentry->d_lock);
@@ -1125,13 +1129,277 @@ static int ceph_rename(struct inode *old_dir, struct dentry *old_dentry,
 }
 
 /*
+ * Move dentry to tail of mdsc->dentry_leases list when lease is updated.
+ * Leases at front of the list will expire first. (Assume all leases have
+ * similar duration)
+ *
+ * Called under dentry->d_lock.
+ */
+void __ceph_dentry_lease_touch(struct ceph_dentry_info *di)
+{
+	struct dentry *dn = di->dentry;
+	struct ceph_mds_client *mdsc;
+
+	dout("dentry_lease_touch %p %p '%pd'\n", di, dn, dn);
+
+	di->flags |= CEPH_DENTRY_LEASE_LIST;
+	if (di->flags & CEPH_DENTRY_SHRINK_LIST) {
+		di->flags |= CEPH_DENTRY_REFERENCED;
+		return;
+	}
+
+	mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
+	spin_lock(&mdsc->dentry_list_lock);
+	list_move_tail(&di->lease_list, &mdsc->dentry_leases);
+	spin_unlock(&mdsc->dentry_list_lock);
+}
+
+static void __dentry_dir_lease_touch(struct ceph_mds_client* mdsc,
+				     struct ceph_dentry_info *di)
+{
+	di->flags &= ~(CEPH_DENTRY_LEASE_LIST | CEPH_DENTRY_REFERENCED);
+	di->lease_gen = 0;
+	di->time = jiffies;
+	list_move_tail(&di->lease_list, &mdsc->dentry_dir_leases);
+}
+
+/*
+ * When dir lease is used, add dentry to tail of mdsc->dentry_dir_leases
+ * list if it's not in the list, otherwise set 'referenced' flag.
+ *
+ * Called under dentry->d_lock.
+ */
+void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di)
+{
+	struct dentry *dn = di->dentry;
+	struct ceph_mds_client *mdsc;
+
+	dout("dentry_dir_lease_touch %p %p '%pd' (offset %lld)\n",
+	     di, dn, dn, di->offset);
+
+	if (!list_empty(&di->lease_list)) {
+		if (di->flags & CEPH_DENTRY_LEASE_LIST) {
+			/* don't remove dentry from dentry lease list
+			 * if its lease is valid */
+			if (__dentry_lease_is_valid(di))
+				return;
+		} else {
+			di->flags |= CEPH_DENTRY_REFERENCED;
+			return;
+		}
+	}
+
+	if (di->flags & CEPH_DENTRY_SHRINK_LIST) {
+		di->flags |= CEPH_DENTRY_REFERENCED;
+		di->flags &= ~CEPH_DENTRY_LEASE_LIST;
+		return;
+	}
+
+	mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
+	spin_lock(&mdsc->dentry_list_lock);
+	__dentry_dir_lease_touch(mdsc, di),
+	spin_unlock(&mdsc->dentry_list_lock);
+}
+
+static void __dentry_lease_unlist(struct ceph_dentry_info *di)
+{
+	struct ceph_mds_client *mdsc;
+	if (di->flags & CEPH_DENTRY_SHRINK_LIST)
+		return;
+	if (list_empty(&di->lease_list))
+		return;
+
+	mdsc = ceph_sb_to_client(di->dentry->d_sb)->mdsc;
+	spin_lock(&mdsc->dentry_list_lock);
+	list_del_init(&di->lease_list);
+	spin_unlock(&mdsc->dentry_list_lock);
+}
+
+enum {
+	KEEP	= 0,
+	DELETE	= 1,
+	TOUCH	= 2,
+	STOP	= 4,
+};
+
+struct ceph_lease_walk_control {
+	bool dir_lease;
+	bool expire_dir_lease;
+	unsigned long nr_to_scan;
+	unsigned long dir_lease_ttl;
+};
+
+static unsigned long
+__dentry_leases_walk(struct ceph_mds_client *mdsc,
+		     struct ceph_lease_walk_control *lwc,
+		     int (*check)(struct dentry*, void*))
+{
+	struct ceph_dentry_info *di, *tmp;
+	struct dentry *dentry, *last = NULL;
+	struct list_head* list;
+        LIST_HEAD(dispose);
+	unsigned long freed = 0;
+	int ret = 0;
+
+	list = lwc->dir_lease ? &mdsc->dentry_dir_leases : &mdsc->dentry_leases;
+	spin_lock(&mdsc->dentry_list_lock);
+	list_for_each_entry_safe(di, tmp, list, lease_list) {
+		if (!lwc->nr_to_scan)
+			break;
+		--lwc->nr_to_scan;
+
+		dentry = di->dentry;
+		if (last == dentry)
+			break;
+
+		if (!spin_trylock(&dentry->d_lock))
+			continue;
+
+		if (dentry->d_lockref.count < 0) {
+			list_del_init(&di->lease_list);
+			goto next;
+		}
+
+		ret = check(dentry, lwc);
+		if (ret & TOUCH) {
+			/* move it into tail of dir lease list */
+			__dentry_dir_lease_touch(mdsc, di);
+			if (!last)
+				last = dentry;
+		}
+		if (ret & DELETE) {
+			/* stale lease */
+			di->flags &= ~CEPH_DENTRY_REFERENCED;
+			if (dentry->d_lockref.count > 0) {
+				/* update_dentry_lease() will re-add
+				 * it to lease list, or
+				 * ceph_d_delete() will return 1 when
+				 * last reference is dropped */
+				list_del_init(&di->lease_list);
+			} else {
+				di->flags |= CEPH_DENTRY_SHRINK_LIST;
+				list_move_tail(&di->lease_list, &dispose);
+				dget_dlock(dentry);
+			}
+		}
+next:
+		spin_unlock(&dentry->d_lock);
+		if (ret & STOP)
+			break;
+	}
+	spin_unlock(&mdsc->dentry_list_lock);
+
+	while (!list_empty(&dispose)) {
+		di = list_first_entry(&dispose, struct ceph_dentry_info,
+				      lease_list);
+		dentry = di->dentry;
+		spin_lock(&dentry->d_lock);
+
+		list_del_init(&di->lease_list);
+		di->flags &= ~CEPH_DENTRY_SHRINK_LIST;
+		if (di->flags & CEPH_DENTRY_REFERENCED) {
+			spin_lock(&mdsc->dentry_list_lock);
+			if (di->flags & CEPH_DENTRY_LEASE_LIST) {
+				list_add_tail(&di->lease_list,
+					      &mdsc->dentry_leases);
+			} else {
+				__dentry_dir_lease_touch(mdsc, di);
+			}
+			spin_unlock(&mdsc->dentry_list_lock);
+		} else {
+			freed++;
+		}
+
+		spin_unlock(&dentry->d_lock);
+		/* ceph_d_delete() does the trick */
+		dput(dentry);
+	}
+	return freed;
+}
+
+static int __dentry_lease_check(struct dentry *dentry, void *arg)
+{
+	struct ceph_dentry_info *di = ceph_dentry(dentry);
+	int ret;
+
+	if (__dentry_lease_is_valid(di))
+		return STOP;
+	ret = __dir_lease_try_check(dentry);
+	if (ret == -EBUSY)
+		return KEEP;
+	if (ret > 0)
+		return TOUCH;
+	return DELETE;
+}
+
+static int __dir_lease_check(struct dentry *dentry, void *arg)
+{
+	struct ceph_lease_walk_control *lwc = arg;
+	struct ceph_dentry_info *di = ceph_dentry(dentry);
+
+	int ret = __dir_lease_try_check(dentry);
+	if (ret == -EBUSY)
+		return KEEP;
+	if (ret > 0) {
+		if (time_before(jiffies, di->time + lwc->dir_lease_ttl))
+			return STOP;
+		/* Move dentry to tail of dir lease list if we don't want
+		 * to delete it. So dentries in the list are checked in a
+		 * round robin manner */
+		if (!lwc->expire_dir_lease)
+			return TOUCH;
+		if (dentry->d_lockref.count > 0 ||
+		    (di->flags & CEPH_DENTRY_REFERENCED))
+			return TOUCH;
+		/* invalidate dir lease */
+		di->lease_shared_gen = 0;
+	}
+	return DELETE;
+}
+
+int ceph_trim_dentries(struct ceph_mds_client *mdsc)
+{
+	struct ceph_lease_walk_control lwc;
+	unsigned long count;
+	unsigned long freed;
+
+	spin_lock(&mdsc->caps_list_lock);
+        if (mdsc->caps_use_max > 0 &&
+            mdsc->caps_use_count > mdsc->caps_use_max)
+		count = mdsc->caps_use_count - mdsc->caps_use_max;
+	else
+		count = 0;
+        spin_unlock(&mdsc->caps_list_lock);
+
+	lwc.dir_lease = false;
+	lwc.nr_to_scan  = CEPH_CAPS_PER_RELEASE * 2;
+	freed = __dentry_leases_walk(mdsc, &lwc, __dentry_lease_check);
+	if (!lwc.nr_to_scan) /* more invalid leases */
+		return -EAGAIN;
+
+	if (lwc.nr_to_scan < CEPH_CAPS_PER_RELEASE)
+		lwc.nr_to_scan = CEPH_CAPS_PER_RELEASE;
+
+	lwc.dir_lease = true;
+	lwc.expire_dir_lease = freed < count;
+	lwc.dir_lease_ttl = mdsc->fsc->mount_options->caps_wanted_delay_max * HZ;
+	freed +=__dentry_leases_walk(mdsc, &lwc, __dir_lease_check);
+	if (!lwc.nr_to_scan) /* more to check */
+		return -EAGAIN;
+
+	return freed > 0 ? 1 : 0;
+}
+
+/*
  * Ensure a dentry lease will no longer revalidate.
  */
 void ceph_invalidate_dentry_lease(struct dentry *dentry)
 {
+	struct ceph_dentry_info *di = ceph_dentry(dentry);
 	spin_lock(&dentry->d_lock);
-	ceph_dentry(dentry)->time = jiffies;
-	ceph_dentry(dentry)->lease_shared_gen = 0;
+	di->time = jiffies;
+	di->lease_shared_gen = 0;
+	__dentry_lease_unlist(di);
 	spin_unlock(&dentry->d_lock);
 }
 
@@ -1139,45 +1407,59 @@ void ceph_invalidate_dentry_lease(struct dentry *dentry)
  * Check if dentry lease is valid.  If not, delete the lease.  Try to
  * renew if the least is more than half up.
  */
+static bool __dentry_lease_is_valid(struct ceph_dentry_info *di)
+{
+	struct ceph_mds_session *session;
+
+	if (!di->lease_gen)
+		return false;
+
+	session = di->lease_session;
+	if (session) {
+		u32 gen;
+		unsigned long ttl;
+
+		spin_lock(&session->s_gen_ttl_lock);
+		gen = session->s_cap_gen;
+		ttl = session->s_cap_ttl;
+		spin_unlock(&session->s_gen_ttl_lock);
+
+		if (di->lease_gen == gen &&
+		    time_before(jiffies, ttl) &&
+		    time_before(jiffies, di->time))
+			return true;
+	}
+	di->lease_gen = 0;
+	return false;
+}
+
 static int dentry_lease_is_valid(struct dentry *dentry, unsigned int flags,
 				 struct inode *dir)
 {
 	struct ceph_dentry_info *di;
-	struct ceph_mds_session *s;
-	int valid = 0;
-	u32 gen;
-	unsigned long ttl;
 	struct ceph_mds_session *session = NULL;
 	u32 seq = 0;
+	int valid = 0;
 
 	spin_lock(&dentry->d_lock);
 	di = ceph_dentry(dentry);
-	if (di && di->lease_session) {
-		s = di->lease_session;
-		spin_lock(&s->s_gen_ttl_lock);
-		gen = s->s_cap_gen;
-		ttl = s->s_cap_ttl;
-		spin_unlock(&s->s_gen_ttl_lock);
+	if (di && __dentry_lease_is_valid(di)) {
+		valid = 1;
 
-		if (di->lease_gen == gen &&
-		    time_before(jiffies, di->time) &&
-		    time_before(jiffies, ttl)) {
-			valid = 1;
-			if (di->lease_renew_after &&
-			    time_after(jiffies, di->lease_renew_after)) {
-				/*
-				 * We should renew. If we're in RCU walk mode
-				 * though, we can't do that so just return
-				 * -ECHILD.
-				 */
-				if (flags & LOOKUP_RCU) {
-					valid = -ECHILD;
-				} else {
-					session = ceph_get_mds_session(s);
-					seq = di->lease_seq;
-					di->lease_renew_after = 0;
-					di->lease_renew_from = jiffies;
-				}
+		if (di->lease_renew_after &&
+		    time_after(jiffies, di->lease_renew_after)) {
+			/*
+			 * We should renew. If we're in RCU walk mode
+			 * though, we can't do that so just return
+			 * -ECHILD.
+			 */
+			if (flags & LOOKUP_RCU) {
+				valid = -ECHILD;
+			} else {
+				session = ceph_get_mds_session(di->lease_session);
+				seq = di->lease_seq;
+				di->lease_renew_after = 0;
+				di->lease_renew_from = jiffies;
 			}
 		}
 	}
@@ -1193,6 +1475,38 @@ static int dentry_lease_is_valid(struct dentry *dentry, unsigned int flags,
 }
 
 /*
+ * Called under dentry->d_lock.
+ */
+static int __dir_lease_try_check(const struct dentry *dentry)
+{
+	struct ceph_dentry_info *di = ceph_dentry(dentry);
+	struct inode *dir;
+	struct ceph_inode_info *ci;
+	int valid = 0;
+
+	if (!di->lease_shared_gen)
+		return 0;
+	if (IS_ROOT(dentry))
+		return 0;
+
+	dir = d_inode(dentry->d_parent);
+	ci = ceph_inode(dir);
+
+	if (spin_trylock(&ci->i_ceph_lock)) {
+		if (atomic_read(&ci->i_shared_gen) == di->lease_shared_gen &&
+		    __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 0))
+			valid = 1;
+		spin_unlock(&ci->i_ceph_lock);
+	} else {
+		valid = -EBUSY;
+	}
+
+	if (!valid)
+		di->lease_shared_gen = 0;
+	return valid;
+}
+
+/*
  * Check if directory-wide content lease/cap is valid.
  */
 static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)
@@ -1205,6 +1519,8 @@ static int dir_lease_is_valid(struct inode *dir, struct dentry *dentry)
 	if (atomic_read(&ci->i_shared_gen) == di->lease_shared_gen)
 		valid = __ceph_caps_issued_mask(ci, CEPH_CAP_FILE_SHARED, 1);
 	spin_unlock(&ci->i_ceph_lock);
+	if (valid)
+		__ceph_dentry_dir_lease_touch(di);
 	dout("dir_lease_is_valid dir %p v%u dentry %p v%u = %d\n",
 	     dir, (unsigned)atomic_read(&ci->i_shared_gen),
 	     dentry, (unsigned)di->lease_shared_gen, valid);
@@ -1297,11 +1613,8 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
 	}
 
 	dout("d_revalidate %p %s\n", dentry, valid ? "valid" : "invalid");
-	if (valid) {
-		ceph_dentry_lru_touch(dentry);
-	} else {
+	if (!valid)
 		ceph_dir_clear_complete(dir);
-	}
 
 	if (!(flags & LOOKUP_RCU))
 		dput(parent);
@@ -1309,6 +1622,31 @@ static int ceph_d_revalidate(struct dentry *dentry, unsigned int flags)
 }
 
 /*
+ * Delete unused dentry that doesn't have valid lease
+ *
+ * Called under dentry->d_lock.
+ */
+static int ceph_d_delete(const struct dentry *dentry)
+{
+	struct ceph_dentry_info *di;
+
+	/* won't release caps */
+	if (d_really_is_negative(dentry))
+		return 0;
+	if (ceph_snap(d_inode(dentry)) != CEPH_NOSNAP)
+		return 0;
+	/* vaild lease? */
+	di = ceph_dentry(dentry);
+	if (di) {
+		if (__dentry_lease_is_valid(di))
+			return 0;
+		if (__dir_lease_try_check(dentry))
+			return 0;
+	}
+	return 1;
+}
+
+/*
  * Release our ceph_dentry_info.
  */
 static void ceph_d_release(struct dentry *dentry)
@@ -1316,9 +1654,9 @@ static void ceph_d_release(struct dentry *dentry)
 	struct ceph_dentry_info *di = ceph_dentry(dentry);
 
 	dout("d_release %p\n", dentry);
-	ceph_dentry_lru_del(dentry);
 
 	spin_lock(&dentry->d_lock);
+	__dentry_lease_unlist(di);
 	dentry->d_fsdata = NULL;
 	spin_unlock(&dentry->d_lock);
 
@@ -1419,49 +1757,7 @@ static ssize_t ceph_read_dir(struct file *file, char __user *buf, size_t size,
 	return size - left;
 }
 
-/*
- * We maintain a private dentry LRU.
- *
- * FIXME: this needs to be changed to a per-mds lru to be useful.
- */
-void ceph_dentry_lru_add(struct dentry *dn)
-{
-	struct ceph_dentry_info *di = ceph_dentry(dn);
-	struct ceph_mds_client *mdsc;
-
-	dout("dentry_lru_add %p %p '%pd'\n", di, dn, dn);
-	mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
-	spin_lock(&mdsc->dentry_lru_lock);
-	list_add_tail(&di->lru, &mdsc->dentry_lru);
-	mdsc->num_dentry++;
-	spin_unlock(&mdsc->dentry_lru_lock);
-}
-
-void ceph_dentry_lru_touch(struct dentry *dn)
-{
-	struct ceph_dentry_info *di = ceph_dentry(dn);
-	struct ceph_mds_client *mdsc;
-
-	dout("dentry_lru_touch %p %p '%pd' (offset %lld)\n", di, dn, dn,
-	     di->offset);
-	mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
-	spin_lock(&mdsc->dentry_lru_lock);
-	list_move_tail(&di->lru, &mdsc->dentry_lru);
-	spin_unlock(&mdsc->dentry_lru_lock);
-}
 
-void ceph_dentry_lru_del(struct dentry *dn)
-{
-	struct ceph_dentry_info *di = ceph_dentry(dn);
-	struct ceph_mds_client *mdsc;
-
-	dout("dentry_lru_del %p %p '%pd'\n", di, dn, dn);
-	mdsc = ceph_sb_to_client(dn->d_sb)->mdsc;
-	spin_lock(&mdsc->dentry_lru_lock);
-	list_del_init(&di->lru);
-	mdsc->num_dentry--;
-	spin_unlock(&mdsc->dentry_lru_lock);
-}
 
 /*
  * Return name hash for a given dentry.  This is dependent on
@@ -1470,6 +1766,7 @@ void ceph_dentry_lru_del(struct dentry *dn)
 unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn)
 {
 	struct ceph_inode_info *dci = ceph_inode(dir);
+	unsigned hash;
 
 	switch (dci->i_dir_layout.dl_dir_hash) {
 	case 0:	/* for backward compat */
@@ -1477,8 +1774,11 @@ unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn)
 		return dn->d_name.hash;
 
 	default:
-		return ceph_str_hash(dci->i_dir_layout.dl_dir_hash,
+		spin_lock(&dn->d_lock);
+		hash = ceph_str_hash(dci->i_dir_layout.dl_dir_hash,
 				     dn->d_name.name, dn->d_name.len);
+		spin_unlock(&dn->d_lock);
+		return hash;
 	}
 }
 
@@ -1531,6 +1831,7 @@ const struct inode_operations ceph_snapdir_iops = {
 
 const struct dentry_operations ceph_dentry_ops = {
 	.d_revalidate = ceph_d_revalidate,
+	.d_delete = ceph_d_delete,
 	.d_release = ceph_d_release,
 	.d_prune = ceph_d_prune,
 	.d_init = ceph_d_init,
diff --git a/fs/ceph/export.c b/fs/ceph/export.c
index 3c59ad180ef0..d3ef7ee429ec 100644
--- a/fs/ceph/export.c
+++ b/fs/ceph/export.c
@@ -22,18 +22,77 @@ struct ceph_nfs_confh {
 	u64 ino, parent_ino;
 } __attribute__ ((packed));
 
+/*
+ * fh for snapped inode
+ */
+struct ceph_nfs_snapfh {
+	u64 ino;
+	u64 snapid;
+	u64 parent_ino;
+	u32 hash;
+} __attribute__ ((packed));
+
+static int ceph_encode_snapfh(struct inode *inode, u32 *rawfh, int *max_len,
+			      struct inode *parent_inode)
+{
+	const static int snap_handle_length =
+		sizeof(struct ceph_nfs_snapfh) >> 2;
+	struct ceph_nfs_snapfh *sfh = (void *)rawfh;
+	u64 snapid = ceph_snap(inode);
+	int ret;
+	bool no_parent = true;
+
+	if (*max_len < snap_handle_length) {
+		*max_len = snap_handle_length;
+		ret = FILEID_INVALID;
+		goto out;
+	}
+
+	ret =  -EINVAL;
+	if (snapid != CEPH_SNAPDIR) {
+		struct inode *dir;
+		struct dentry *dentry = d_find_alias(inode);
+		if (!dentry)
+			goto out;
+
+		rcu_read_lock();
+		dir = d_inode_rcu(dentry->d_parent);
+		if (ceph_snap(dir) != CEPH_SNAPDIR) {
+			sfh->parent_ino = ceph_ino(dir);
+			sfh->hash = ceph_dentry_hash(dir, dentry);
+			no_parent = false;
+		}
+		rcu_read_unlock();
+		dput(dentry);
+	}
+
+	if (no_parent) {
+		if (!S_ISDIR(inode->i_mode))
+			goto out;
+		sfh->parent_ino = sfh->ino;
+		sfh->hash = 0;
+	}
+	sfh->ino = ceph_ino(inode);
+	sfh->snapid = snapid;
+
+	*max_len = snap_handle_length;
+	ret = FILEID_BTRFS_WITH_PARENT;
+out:
+	dout("encode_snapfh %llx.%llx ret=%d\n", ceph_vinop(inode), ret);
+	return ret;
+}
+
 static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len,
 			  struct inode *parent_inode)
 {
+	const static int handle_length =
+		sizeof(struct ceph_nfs_fh) >> 2;
+	const static int connected_handle_length =
+		sizeof(struct ceph_nfs_confh) >> 2;
 	int type;
-	struct ceph_nfs_fh *fh = (void *)rawfh;
-	struct ceph_nfs_confh *cfh = (void *)rawfh;
-	int connected_handle_length = sizeof(*cfh)/4;
-	int handle_length = sizeof(*fh)/4;
 
-	/* don't re-export snaps */
 	if (ceph_snap(inode) != CEPH_NOSNAP)
-		return -EINVAL;
+		return ceph_encode_snapfh(inode, rawfh, max_len, parent_inode);
 
 	if (parent_inode && (*max_len < connected_handle_length)) {
 		*max_len = connected_handle_length;
@@ -44,6 +103,7 @@ static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len,
 	}
 
 	if (parent_inode) {
+		struct ceph_nfs_confh *cfh = (void *)rawfh;
 		dout("encode_fh %llx with parent %llx\n",
 		     ceph_ino(inode), ceph_ino(parent_inode));
 		cfh->ino = ceph_ino(inode);
@@ -51,6 +111,7 @@ static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len,
 		*max_len = connected_handle_length;
 		type = FILEID_INO32_GEN_PARENT;
 	} else {
+		struct ceph_nfs_fh *fh = (void *)rawfh;
 		dout("encode_fh %llx\n", ceph_ino(inode));
 		fh->ino = ceph_ino(inode);
 		*max_len = handle_length;
@@ -59,7 +120,7 @@ static int ceph_encode_fh(struct inode *inode, u32 *rawfh, int *max_len,
 	return type;
 }
 
-static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
+static struct inode *__lookup_inode(struct super_block *sb, u64 ino)
 {
 	struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
 	struct inode *inode;
@@ -81,7 +142,7 @@ static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
 		mask = CEPH_STAT_CAP_INODE;
 		if (ceph_security_xattr_wanted(d_inode(sb->s_root)))
 			mask |= CEPH_CAP_XATTR_SHARED;
-		req->r_args.getattr.mask = cpu_to_le32(mask);
+		req->r_args.lookupino.mask = cpu_to_le32(mask);
 
 		req->r_ino1 = vino;
 		req->r_num_caps = 1;
@@ -91,16 +152,114 @@ static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
 			ihold(inode);
 		ceph_mdsc_put_request(req);
 		if (!inode)
-			return ERR_PTR(-ESTALE);
-		if (inode->i_nlink == 0) {
-			iput(inode);
-			return ERR_PTR(-ESTALE);
-		}
+			return err < 0 ? ERR_PTR(err) : ERR_PTR(-ESTALE);
 	}
+	return inode;
+}
+
+struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino)
+{
+	struct inode *inode = __lookup_inode(sb, ino);
+	if (IS_ERR(inode))
+		return inode;
+	if (inode->i_nlink == 0) {
+		iput(inode);
+		return ERR_PTR(-ESTALE);
+	}
+	return inode;
+}
 
+static struct dentry *__fh_to_dentry(struct super_block *sb, u64 ino)
+{
+	struct inode *inode = __lookup_inode(sb, ino);
+	if (IS_ERR(inode))
+		return ERR_CAST(inode);
+	if (inode->i_nlink == 0) {
+		iput(inode);
+		return ERR_PTR(-ESTALE);
+	}
 	return d_obtain_alias(inode);
 }
 
+static struct dentry *__snapfh_to_dentry(struct super_block *sb,
+					  struct ceph_nfs_snapfh *sfh,
+					  bool want_parent)
+{
+	struct ceph_mds_client *mdsc = ceph_sb_to_client(sb)->mdsc;
+	struct ceph_mds_request *req;
+	struct inode *inode;
+	struct ceph_vino vino;
+	int mask;
+	int err;
+	bool unlinked = false;
+
+	if (want_parent) {
+		vino.ino = sfh->parent_ino;
+		if (sfh->snapid == CEPH_SNAPDIR)
+			vino.snap = CEPH_NOSNAP;
+		else if (sfh->ino == sfh->parent_ino)
+			vino.snap = CEPH_SNAPDIR;
+		else
+			vino.snap = sfh->snapid;
+	} else {
+		vino.ino = sfh->ino;
+		vino.snap = sfh->snapid;
+	}
+	inode = ceph_find_inode(sb, vino);
+	if (inode)
+		return d_obtain_alias(inode);
+
+	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LOOKUPINO,
+				       USE_ANY_MDS);
+	if (IS_ERR(req))
+		return ERR_CAST(req);
+
+	mask = CEPH_STAT_CAP_INODE;
+	if (ceph_security_xattr_wanted(d_inode(sb->s_root)))
+		mask |= CEPH_CAP_XATTR_SHARED;
+	req->r_args.lookupino.mask = cpu_to_le32(mask);
+	if (vino.snap < CEPH_NOSNAP) {
+		req->r_args.lookupino.snapid = cpu_to_le64(vino.snap);
+		if (!want_parent && sfh->ino != sfh->parent_ino) {
+			req->r_args.lookupino.parent =
+					cpu_to_le64(sfh->parent_ino);
+			req->r_args.lookupino.hash =
+					cpu_to_le32(sfh->hash);
+		}
+	}
+
+	req->r_ino1 = vino;
+	req->r_num_caps = 1;
+	err = ceph_mdsc_do_request(mdsc, NULL, req);
+	inode = req->r_target_inode;
+	if (inode) {
+		if (vino.snap == CEPH_SNAPDIR) {
+			if (inode->i_nlink == 0)
+				unlinked = true;
+			inode = ceph_get_snapdir(inode);
+		} else if (ceph_snap(inode) == vino.snap) {
+			ihold(inode);
+		} else {
+			/* mds does not support lookup snapped inode */
+			err = -EOPNOTSUPP;
+			inode = NULL;
+		}
+	}
+	ceph_mdsc_put_request(req);
+
+	if (want_parent) {
+		dout("snapfh_to_parent %llx.%llx\n err=%d\n",
+		     vino.ino, vino.snap, err);
+	} else {
+		dout("snapfh_to_dentry %llx.%llx parent %llx hash %x err=%d",
+		      vino.ino, vino.snap, sfh->parent_ino, sfh->hash, err);
+	}
+	if (!inode)
+		return ERR_PTR(-ESTALE);
+	/* see comments in ceph_get_parent() */
+	return unlinked ? d_obtain_root(inode) : d_obtain_alias(inode);
+}
+
 /*
  * convert regular fh to dentry
  */
@@ -110,6 +269,11 @@ static struct dentry *ceph_fh_to_dentry(struct super_block *sb,
 {
 	struct ceph_nfs_fh *fh = (void *)fid->raw;
 
+	if (fh_type == FILEID_BTRFS_WITH_PARENT) {
+		struct ceph_nfs_snapfh *sfh = (void *)fid->raw;
+		return __snapfh_to_dentry(sb, sfh, false);
+	}
+
 	if (fh_type != FILEID_INO32_GEN  &&
 	    fh_type != FILEID_INO32_GEN_PARENT)
 		return NULL;
@@ -163,13 +327,49 @@ static struct dentry *__get_parent(struct super_block *sb,
 
 static struct dentry *ceph_get_parent(struct dentry *child)
 {
-	/* don't re-export snaps */
-	if (ceph_snap(d_inode(child)) != CEPH_NOSNAP)
-		return ERR_PTR(-EINVAL);
-
-	dout("get_parent %p ino %llx.%llx\n",
-	     child, ceph_vinop(d_inode(child)));
-	return __get_parent(child->d_sb, child, 0);
+	struct inode *inode = d_inode(child);
+	struct dentry *dn;
+
+	if (ceph_snap(inode) != CEPH_NOSNAP) {
+		struct inode* dir;
+		bool unlinked = false;
+		/* do not support non-directory */
+		if (!d_is_dir(child)) {
+			dn = ERR_PTR(-EINVAL);
+			goto out;
+		}
+		dir = __lookup_inode(inode->i_sb, ceph_ino(inode));
+		if (IS_ERR(dir)) {
+			dn = ERR_CAST(dir);
+			goto out;
+		}
+		/* There can be multiple paths to access snapped inode.
+		 * For simplicity, treat snapdir of head inode as parent */
+		if (ceph_snap(inode) != CEPH_SNAPDIR) {
+			struct inode *snapdir = ceph_get_snapdir(dir);
+			if (dir->i_nlink == 0)
+				unlinked = true;
+			iput(dir);
+			if (IS_ERR(snapdir)) {
+				dn = ERR_CAST(snapdir);
+				goto out;
+			}
+			dir = snapdir;
+		}
+		/* If directory has already been deleted, futher get_parent
+		 * will fail. Do not mark snapdir dentry as disconnected,
+		 * this prevent exportfs from doing futher get_parent. */
+		if (unlinked)
+			dn = d_obtain_root(dir);
+		else
+			dn = d_obtain_alias(dir);
+	} else {
+		dn = __get_parent(child->d_sb, child, 0);
+	}
+out:
+	dout("get_parent %p ino %llx.%llx err=%ld\n",
+	     child, ceph_vinop(inode), (IS_ERR(dn) ? PTR_ERR(dn) : 0));
+	return dn;
 }
 
 /*
@@ -182,6 +382,11 @@ static struct dentry *ceph_fh_to_parent(struct super_block *sb,
 	struct ceph_nfs_confh *cfh = (void *)fid->raw;
 	struct dentry *dentry;
 
+	if (fh_type == FILEID_BTRFS_WITH_PARENT) {
+		struct ceph_nfs_snapfh *sfh = (void *)fid->raw;
+		return __snapfh_to_dentry(sb, sfh, true);
+	}
+
 	if (fh_type != FILEID_INO32_GEN_PARENT)
 		return NULL;
 	if (fh_len < sizeof(*cfh) / 4)
@@ -194,14 +399,115 @@ static struct dentry *ceph_fh_to_parent(struct super_block *sb,
 	return dentry;
 }
 
+static int __get_snap_name(struct dentry *parent, char *name,
+			   struct dentry *child)
+{
+	struct inode *inode = d_inode(child);
+	struct inode *dir = d_inode(parent);
+	struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
+	struct ceph_mds_request *req = NULL;
+	char *last_name = NULL;
+	unsigned next_offset = 2;
+	int err = -EINVAL;
+
+	if (ceph_ino(inode) != ceph_ino(dir))
+		goto out;
+	if (ceph_snap(inode) == CEPH_SNAPDIR) {
+		if (ceph_snap(dir) == CEPH_NOSNAP) {
+			strcpy(name, fsc->mount_options->snapdir_name);
+			err = 0;
+		}
+		goto out;
+	}
+	if (ceph_snap(dir) != CEPH_SNAPDIR)
+		goto out;
+
+	while (1) {
+		struct ceph_mds_reply_info_parsed *rinfo;
+		struct ceph_mds_reply_dir_entry *rde;
+		int i;
+
+		req = ceph_mdsc_create_request(fsc->mdsc, CEPH_MDS_OP_LSSNAP,
+					       USE_AUTH_MDS);
+		if (IS_ERR(req)) {
+			err = PTR_ERR(req);
+			req = NULL;
+			goto out;
+		}
+		err = ceph_alloc_readdir_reply_buffer(req, inode);
+		if (err)
+			goto out;
+
+		req->r_direct_mode = USE_AUTH_MDS;
+		req->r_readdir_offset = next_offset;
+		req->r_args.readdir.flags =
+				cpu_to_le16(CEPH_READDIR_REPLY_BITFLAGS);
+		if (last_name) {
+			req->r_path2 = last_name;
+			last_name = NULL;
+		}
+
+		req->r_inode = dir;
+		ihold(dir);
+		req->r_dentry = dget(parent);
+
+		inode_lock(dir);
+		err = ceph_mdsc_do_request(fsc->mdsc, NULL, req);
+		inode_unlock(dir);
+
+		if (err < 0)
+			goto out;
+
+		 rinfo = &req->r_reply_info;
+		 for (i = 0; i < rinfo->dir_nr; i++) {
+			 rde = rinfo->dir_entries + i;
+			 BUG_ON(!rde->inode.in);
+			 if (ceph_snap(inode) ==
+			     le64_to_cpu(rde->inode.in->snapid)) {
+				 memcpy(name, rde->name, rde->name_len);
+				 name[rde->name_len] = '\0';
+				 err = 0;
+				 goto out;
+			 }
+		 }
+
+		 if (rinfo->dir_end)
+			 break;
+
+		 BUG_ON(rinfo->dir_nr <= 0);
+		 rde = rinfo->dir_entries + (rinfo->dir_nr - 1);
+		 next_offset += rinfo->dir_nr;
+		 last_name = kstrndup(rde->name, rde->name_len, GFP_KERNEL);
+		 if (!last_name) {
+			 err = -ENOMEM;
+			 goto out;
+		 }
+
+		 ceph_mdsc_put_request(req);
+		 req = NULL;
+	}
+	err = -ENOENT;
+out:
+	if (req)
+		ceph_mdsc_put_request(req);
+	kfree(last_name);
+	dout("get_snap_name %p ino %llx.%llx err=%d\n",
+	     child, ceph_vinop(inode), err);
+	return err;
+}
+
 static int ceph_get_name(struct dentry *parent, char *name,
 			 struct dentry *child)
 {
 	struct ceph_mds_client *mdsc;
 	struct ceph_mds_request *req;
+	struct inode *inode = d_inode(child);
 	int err;
 
-	mdsc = ceph_inode_to_client(d_inode(child))->mdsc;
+	if (ceph_snap(inode) != CEPH_NOSNAP)
+		return __get_snap_name(parent, name, child);
+
+	mdsc = ceph_inode_to_client(inode)->mdsc;
 	req = ceph_mdsc_create_request(mdsc, CEPH_MDS_OP_LOOKUPNAME,
 				       USE_ANY_MDS);
 	if (IS_ERR(req))
@@ -209,8 +515,8 @@ static int ceph_get_name(struct dentry *parent, char *name,
 
 	inode_lock(d_inode(parent));
 
-	req->r_inode = d_inode(child);
-	ihold(d_inode(child));
+	req->r_inode = inode;
+	ihold(inode);
 	req->r_ino2 = ceph_vino(d_inode(parent));
 	req->r_parent = d_inode(parent);
 	set_bit(CEPH_MDS_R_PARENT_LOCKED, &req->r_req_flags);
@@ -224,10 +530,10 @@ static int ceph_get_name(struct dentry *parent, char *name,
 		memcpy(name, rinfo->dname, rinfo->dname_len);
 		name[rinfo->dname_len] = 0;
 		dout("get_name %p ino %llx.%llx name %s\n",
-		     child, ceph_vinop(d_inode(child)), name);
+		     child, ceph_vinop(inode), name);
 	} else {
 		dout("get_name %p ino %llx.%llx err %d\n",
-		     child, ceph_vinop(d_inode(child)), err);
+		     child, ceph_vinop(inode), err);
 	}
 
 	ceph_mdsc_put_request(req);
diff --git a/fs/ceph/file.c b/fs/ceph/file.c
index 189df668b6a0..c5517ffeb11c 100644
--- a/fs/ceph/file.c
+++ b/fs/ceph/file.c
@@ -247,6 +247,7 @@ static int ceph_init_file(struct inode *inode, struct file *file, int fmode)
 	case S_IFREG:
 		ceph_fscache_register_inode_cookie(inode);
 		ceph_fscache_file_set_cookie(inode, file);
+		/* fall through */
 	case S_IFDIR:
 		ret = ceph_init_file_info(inode, file, fmode,
 						S_ISDIR(inode->i_mode));
@@ -590,7 +591,8 @@ static ssize_t ceph_sync_read(struct kiocb *iocb, struct iov_iter *to,
 	 * but it will at least behave sensibly when they are
 	 * in sequence.
 	 */
-	ret = filemap_write_and_wait_range(inode->i_mapping, off, off + len);
+	ret = filemap_write_and_wait_range(inode->i_mapping,
+					   off, off + len - 1);
 	if (ret < 0)
 		return ret;
 
@@ -789,7 +791,7 @@ static void ceph_aio_complete_req(struct ceph_osd_request *req)
 		if (aio_work) {
 			INIT_WORK(&aio_work->work, ceph_aio_retry_work);
 			aio_work->req = req;
-			queue_work(ceph_inode_to_client(inode)->wb_wq,
+			queue_work(ceph_inode_to_client(inode)->inode_wq,
 				   &aio_work->work);
 			return;
 		}
@@ -927,16 +929,17 @@ ceph_direct_read_write(struct kiocb *iocb, struct iov_iter *iter,
 
 	dout("sync_direct_%s on file %p %lld~%u snapc %p seq %lld\n",
 	     (write ? "write" : "read"), file, pos, (unsigned)count,
-	     snapc, snapc->seq);
+	     snapc, snapc ? snapc->seq : 0);
 
-	ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count);
+	ret = filemap_write_and_wait_range(inode->i_mapping,
+					   pos, pos + count - 1);
 	if (ret < 0)
 		return ret;
 
 	if (write) {
 		int ret2 = invalidate_inode_pages2_range(inode->i_mapping,
 					pos >> PAGE_SHIFT,
-					(pos + count) >> PAGE_SHIFT);
+					(pos + count - 1) >> PAGE_SHIFT);
 		if (ret2 < 0)
 			dout("invalidate_inode_pages2_range returned %d\n", ret2);
 
@@ -1132,13 +1135,14 @@ ceph_sync_write(struct kiocb *iocb, struct iov_iter *from, loff_t pos,
 	dout("sync_write on file %p %lld~%u snapc %p seq %lld\n",
 	     file, pos, (unsigned)count, snapc, snapc->seq);
 
-	ret = filemap_write_and_wait_range(inode->i_mapping, pos, pos + count);
+	ret = filemap_write_and_wait_range(inode->i_mapping,
+					   pos, pos + count - 1);
 	if (ret < 0)
 		return ret;
 
 	ret = invalidate_inode_pages2_range(inode->i_mapping,
 					    pos >> PAGE_SHIFT,
-					    (pos + count) >> PAGE_SHIFT);
+					    (pos + count - 1) >> PAGE_SHIFT);
 	if (ret < 0)
 		dout("invalidate_inode_pages2_range returned %d\n", ret);
 
@@ -1885,9 +1889,9 @@ static int is_file_size_ok(struct inode *src_inode, struct inode *dst_inode,
 	return 0;
 }
 
-static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off,
-				    struct file *dst_file, loff_t dst_off,
-				    size_t len, unsigned int flags)
+static ssize_t __ceph_copy_file_range(struct file *src_file, loff_t src_off,
+				      struct file *dst_file, loff_t dst_off,
+				      size_t len, unsigned int flags)
 {
 	struct inode *src_inode = file_inode(src_file);
 	struct inode *dst_inode = file_inode(dst_file);
@@ -1905,6 +1909,8 @@ static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off,
 
 	if (src_inode == dst_inode)
 		return -EINVAL;
+	if (src_inode->i_sb != dst_inode->i_sb)
+		return -EXDEV;
 	if (ceph_snap(dst_inode) != CEPH_NOSNAP)
 		return -EROFS;
 
@@ -2096,6 +2102,21 @@ out:
 	return ret;
 }
 
+static ssize_t ceph_copy_file_range(struct file *src_file, loff_t src_off,
+				    struct file *dst_file, loff_t dst_off,
+				    size_t len, unsigned int flags)
+{
+	ssize_t ret;
+
+	ret = __ceph_copy_file_range(src_file, src_off, dst_file, dst_off,
+				     len, flags);
+
+	if (ret == -EOPNOTSUPP || ret == -EXDEV)
+		ret = generic_copy_file_range(src_file, src_off, dst_file,
+					      dst_off, len, flags);
+	return ret;
+}
+
 const struct file_operations ceph_file_fops = {
 	.open = ceph_open,
 	.release = ceph_release,
diff --git a/fs/ceph/inode.c b/fs/ceph/inode.c
index 9d1f34d46627..761451f36e2d 100644
--- a/fs/ceph/inode.c
+++ b/fs/ceph/inode.c
@@ -33,9 +33,7 @@
 
 static const struct inode_operations ceph_symlink_iops;
 
-static void ceph_invalidate_work(struct work_struct *work);
-static void ceph_writeback_work(struct work_struct *work);
-static void ceph_vmtruncate_work(struct work_struct *work);
+static void ceph_inode_work(struct work_struct *work);
 
 /*
  * find or create an inode, given the ceph ino number
@@ -497,7 +495,7 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
 	ci->i_wrbuffer_ref = 0;
 	ci->i_wrbuffer_ref_head = 0;
 	atomic_set(&ci->i_filelock_ref, 0);
-	atomic_set(&ci->i_shared_gen, 0);
+	atomic_set(&ci->i_shared_gen, 1);
 	ci->i_rdcache_gen = 0;
 	ci->i_rdcache_revoking = 0;
 
@@ -509,21 +507,19 @@ struct inode *ceph_alloc_inode(struct super_block *sb)
 	INIT_LIST_HEAD(&ci->i_snap_realm_item);
 	INIT_LIST_HEAD(&ci->i_snap_flush_item);
 
-	INIT_WORK(&ci->i_wb_work, ceph_writeback_work);
-	INIT_WORK(&ci->i_pg_inv_work, ceph_invalidate_work);
-
-	INIT_WORK(&ci->i_vmtruncate_work, ceph_vmtruncate_work);
+	INIT_WORK(&ci->i_work, ceph_inode_work);
+	ci->i_work_mask = 0;
 
 	ceph_fscache_inode_init(ci);
 
 	return &ci->vfs_inode;
 }
 
-static void ceph_i_callback(struct rcu_head *head)
+void ceph_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	struct ceph_inode_info *ci = ceph_inode(inode);
 
+	kfree(ci->i_symlink);
 	kmem_cache_free(ceph_inode_cachep, ci);
 }
 
@@ -537,7 +533,7 @@ void ceph_destroy_inode(struct inode *inode)
 
 	ceph_fscache_unregister_inode_cookie(ci);
 
-	ceph_queue_caps_release(inode);
+	__ceph_remove_caps(inode);
 
 	if (__ceph_has_any_quota(ci))
 		ceph_adjust_quota_realms_count(inode, false);
@@ -548,20 +544,24 @@ void ceph_destroy_inode(struct inode *inode)
 	 */
 	if (ci->i_snap_realm) {
 		struct ceph_mds_client *mdsc =
-			ceph_sb_to_client(ci->vfs_inode.i_sb)->mdsc;
-		struct ceph_snap_realm *realm = ci->i_snap_realm;
-
-		dout(" dropping residual ref to snap realm %p\n", realm);
-		spin_lock(&realm->inodes_with_caps_lock);
-		list_del_init(&ci->i_snap_realm_item);
-		ci->i_snap_realm = NULL;
-		if (realm->ino == ci->i_vino.ino)
-			realm->inode = NULL;
-		spin_unlock(&realm->inodes_with_caps_lock);
-		ceph_put_snap_realm(mdsc, realm);
+					ceph_inode_to_client(inode)->mdsc;
+		if (ceph_snap(inode) == CEPH_NOSNAP) {
+			struct ceph_snap_realm *realm = ci->i_snap_realm;
+			dout(" dropping residual ref to snap realm %p\n",
+			     realm);
+			spin_lock(&realm->inodes_with_caps_lock);
+			list_del_init(&ci->i_snap_realm_item);
+			ci->i_snap_realm = NULL;
+			if (realm->ino == ci->i_vino.ino)
+				realm->inode = NULL;
+			spin_unlock(&realm->inodes_with_caps_lock);
+			ceph_put_snap_realm(mdsc, realm);
+		} else {
+			ceph_put_snapid_map(mdsc, ci->i_snapid_map);
+			ci->i_snap_realm = NULL;
+		}
 	}
 
-	kfree(ci->i_symlink);
 	while ((n = rb_first(&ci->i_fragtree)) != NULL) {
 		frag = rb_entry(n, struct ceph_inode_frag, node);
 		rb_erase(n, &ci->i_fragtree);
@@ -576,8 +576,6 @@ void ceph_destroy_inode(struct inode *inode)
 		ceph_buffer_put(ci->i_xattrs.prealloc_blob);
 
 	ceph_put_string(rcu_dereference_raw(ci->i_layout.pool_ns));
-
-	call_rcu(&inode->i_rcu, ceph_i_callback);
 }
 
 int ceph_drop_inode(struct inode *inode)
@@ -776,6 +774,9 @@ static int fill_inode(struct inode *inode, struct page *locked_page,
 		pool_ns = ceph_find_or_create_string(iinfo->pool_ns_data,
 						     iinfo->pool_ns_len);
 
+	if (ceph_snap(inode) != CEPH_NOSNAP && !ci->i_snapid_map)
+		ci->i_snapid_map = ceph_get_snapid_map(mdsc, ceph_snap(inode));
+
 	spin_lock(&ci->i_ceph_lock);
 
 	/*
@@ -869,6 +870,7 @@ static int fill_inode(struct inode *inode, struct page *locked_page,
 			ci->i_rbytes = le64_to_cpu(info->rbytes);
 			ci->i_rfiles = le64_to_cpu(info->rfiles);
 			ci->i_rsubdirs = le64_to_cpu(info->rsubdirs);
+			ci->i_dir_pin = iinfo->dir_pin;
 			ceph_decode_timespec64(&ci->i_rctime, &info->rctime);
 		}
 	}
@@ -899,6 +901,7 @@ static int fill_inode(struct inode *inode, struct page *locked_page,
 	case S_IFBLK:
 	case S_IFCHR:
 	case S_IFSOCK:
+		inode->i_blkbits = PAGE_SHIFT;
 		init_special_inode(inode, inode->i_mode, inode->i_rdev);
 		inode->i_op = &ceph_file_iops;
 		break;
@@ -1066,9 +1069,10 @@ static void update_dentry_lease(struct dentry *dentry,
 		goto out_unlock;
 
 	di->lease_shared_gen = atomic_read(&ceph_inode(dir)->i_shared_gen);
-
-	if (duration == 0)
+	if (duration == 0) {
+		__ceph_dentry_dir_lease_touch(di);
 		goto out_unlock;
+	}
 
 	if (di->lease_gen == session->s_cap_gen &&
 	    time_before(ttl, di->time))
@@ -1079,8 +1083,6 @@ static void update_dentry_lease(struct dentry *dentry,
 		di->lease_session = NULL;
 	}
 
-	ceph_dentry_lru_touch(dentry);
-
 	if (!di->lease_session)
 		di->lease_session = ceph_get_mds_session(session);
 	di->lease_gen = session->s_cap_gen;
@@ -1088,6 +1090,8 @@ static void update_dentry_lease(struct dentry *dentry,
 	di->lease_renew_after = half_ttl;
 	di->lease_renew_from = 0;
 	di->time = ttl;
+
+	__ceph_dentry_lease_touch(di);
 out_unlock:
 	spin_unlock(&dentry->d_lock);
 	if (old_lease_session)
@@ -1152,6 +1156,19 @@ static int splice_dentry(struct dentry **pdn, struct inode *in)
 	return 0;
 }
 
+static int d_name_cmp(struct dentry *dentry, const char *name, size_t len)
+{
+	int ret;
+
+	/* take d_lock to ensure dentry->d_name stability */
+	spin_lock(&dentry->d_lock);
+	ret = dentry->d_name.len - len;
+	if (!ret)
+		ret = memcmp(dentry->d_name.name, name, len);
+	spin_unlock(&dentry->d_lock);
+	return ret;
+}
+
 /*
  * Incorporate results into the local cache.  This is either just
  * one inode, or a directory, dentry, and possibly linked-to inode (e.g.,
@@ -1401,7 +1418,8 @@ retry_lookup:
 		err = splice_dentry(&req->r_dentry, in);
 		if (err < 0)
 			goto done;
-	} else if (rinfo->head->is_dentry) {
+	} else if (rinfo->head->is_dentry &&
+		   !d_name_cmp(req->r_dentry, rinfo->dname, rinfo->dname_len)) {
 		struct ceph_vino *ptvino = NULL;
 
 		if ((le32_to_cpu(rinfo->diri.in->cap.caps) & CEPH_CAP_FILE_SHARED) ||
@@ -1458,7 +1476,8 @@ static int readdir_prepopulate_inodes_only(struct ceph_mds_request *req,
 			pr_err("fill_inode badness on %p got %d\n", in, rc);
 			err = rc;
 		}
-		iput(in);
+		/* avoid calling iput_final() in mds dispatch threads */
+		ceph_async_iput(in);
 	}
 
 	return err;
@@ -1656,8 +1675,11 @@ retry_lookup:
 				 &req->r_caps_reservation);
 		if (ret < 0) {
 			pr_err("fill_inode badness on %p\n", in);
-			if (d_really_is_negative(dn))
-				iput(in);
+			if (d_really_is_negative(dn)) {
+				/* avoid calling iput_final() in mds
+				 * dispatch threads */
+				ceph_async_iput(in);
+			}
 			d_drop(dn);
 			err = ret;
 			goto next_item;
@@ -1667,7 +1689,7 @@ retry_lookup:
 			if (ceph_security_xattr_deadlock(in)) {
 				dout(" skip splicing dn %p to inode %p"
 				     " (security xattr deadlock)\n", dn, in);
-				iput(in);
+				ceph_async_iput(in);
 				skipped++;
 				goto next_item;
 			}
@@ -1719,56 +1741,86 @@ bool ceph_inode_set_size(struct inode *inode, loff_t size)
 }
 
 /*
+ * Put reference to inode, but avoid calling iput_final() in current thread.
+ * iput_final() may wait for reahahead pages. The wait can cause deadlock in
+ * some contexts.
+ */
+void ceph_async_iput(struct inode *inode)
+{
+	if (!inode)
+		return;
+	for (;;) {
+		if (atomic_add_unless(&inode->i_count, -1, 1))
+			break;
+		if (queue_work(ceph_inode_to_client(inode)->inode_wq,
+			       &ceph_inode(inode)->i_work))
+			break;
+		/* queue work failed, i_count must be at least 2 */
+	}
+}
+
+/*
  * Write back inode data in a worker thread.  (This can't be done
  * in the message handler context.)
  */
 void ceph_queue_writeback(struct inode *inode)
 {
+	struct ceph_inode_info *ci = ceph_inode(inode);
+	set_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask);
+
 	ihold(inode);
-	if (queue_work(ceph_inode_to_client(inode)->wb_wq,
-		       &ceph_inode(inode)->i_wb_work)) {
+	if (queue_work(ceph_inode_to_client(inode)->inode_wq,
+		       &ci->i_work)) {
 		dout("ceph_queue_writeback %p\n", inode);
 	} else {
-		dout("ceph_queue_writeback %p failed\n", inode);
+		dout("ceph_queue_writeback %p already queued, mask=%lx\n",
+		     inode, ci->i_work_mask);
 		iput(inode);
 	}
 }
 
-static void ceph_writeback_work(struct work_struct *work)
-{
-	struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
-						  i_wb_work);
-	struct inode *inode = &ci->vfs_inode;
-
-	dout("writeback %p\n", inode);
-	filemap_fdatawrite(&inode->i_data);
-	iput(inode);
-}
-
 /*
  * queue an async invalidation
  */
 void ceph_queue_invalidate(struct inode *inode)
 {
+	struct ceph_inode_info *ci = ceph_inode(inode);
+	set_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask);
+
 	ihold(inode);
-	if (queue_work(ceph_inode_to_client(inode)->pg_inv_wq,
-		       &ceph_inode(inode)->i_pg_inv_work)) {
+	if (queue_work(ceph_inode_to_client(inode)->inode_wq,
+		       &ceph_inode(inode)->i_work)) {
 		dout("ceph_queue_invalidate %p\n", inode);
 	} else {
-		dout("ceph_queue_invalidate %p failed\n", inode);
+		dout("ceph_queue_invalidate %p already queued, mask=%lx\n",
+		     inode, ci->i_work_mask);
 		iput(inode);
 	}
 }
 
 /*
- * Invalidate inode pages in a worker thread.  (This can't be done
- * in the message handler context.)
+ * Queue an async vmtruncate.  If we fail to queue work, we will handle
+ * the truncation the next time we call __ceph_do_pending_vmtruncate.
  */
-static void ceph_invalidate_work(struct work_struct *work)
+void ceph_queue_vmtruncate(struct inode *inode)
 {
-	struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
-						  i_pg_inv_work);
-	struct inode *inode = &ci->vfs_inode;
+	struct ceph_inode_info *ci = ceph_inode(inode);
+	set_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask);
+
+	ihold(inode);
+	if (queue_work(ceph_inode_to_client(inode)->inode_wq,
+		       &ci->i_work)) {
+		dout("ceph_queue_vmtruncate %p\n", inode);
+	} else {
+		dout("ceph_queue_vmtruncate %p already queued, mask=%lx\n",
+		     inode, ci->i_work_mask);
+		iput(inode);
+	}
+}
+
+static void ceph_do_invalidate_pages(struct inode *inode)
+{
+	struct ceph_inode_info *ci = ceph_inode(inode);
 	struct ceph_fs_client *fsc = ceph_inode_to_client(inode);
 	u32 orig_gen;
 	int check = 0;
@@ -1820,44 +1872,6 @@ static void ceph_invalidate_work(struct work_struct *work)
 out:
 	if (check)
 		ceph_check_caps(ci, 0, NULL);
-	iput(inode);
-}
-
-
-/*
- * called by trunc_wq;
- *
- * We also truncate in a separate thread as well.
- */
-static void ceph_vmtruncate_work(struct work_struct *work)
-{
-	struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
-						  i_vmtruncate_work);
-	struct inode *inode = &ci->vfs_inode;
-
-	dout("vmtruncate_work %p\n", inode);
-	__ceph_do_pending_vmtruncate(inode);
-	iput(inode);
-}
-
-/*
- * Queue an async vmtruncate.  If we fail to queue work, we will handle
- * the truncation the next time we call __ceph_do_pending_vmtruncate.
- */
-void ceph_queue_vmtruncate(struct inode *inode)
-{
-	struct ceph_inode_info *ci = ceph_inode(inode);
-
-	ihold(inode);
-
-	if (queue_work(ceph_sb_to_client(inode->i_sb)->trunc_wq,
-		       &ci->i_vmtruncate_work)) {
-		dout("ceph_queue_vmtruncate %p\n", inode);
-	} else {
-		dout("ceph_queue_vmtruncate %p failed, pending=%d\n",
-		     inode, ci->i_truncate_pending);
-		iput(inode);
-	}
 }
 
 /*
@@ -1921,6 +1935,25 @@ retry:
 	wake_up_all(&ci->i_cap_wq);
 }
 
+static void ceph_inode_work(struct work_struct *work)
+{
+	struct ceph_inode_info *ci = container_of(work, struct ceph_inode_info,
+						 i_work);
+	struct inode *inode = &ci->vfs_inode;
+
+	if (test_and_clear_bit(CEPH_I_WORK_WRITEBACK, &ci->i_work_mask)) {
+		dout("writeback %p\n", inode);
+		filemap_fdatawrite(&inode->i_data);
+	}
+	if (test_and_clear_bit(CEPH_I_WORK_INVALIDATE_PAGES, &ci->i_work_mask))
+		ceph_do_invalidate_pages(inode);
+
+	if (test_and_clear_bit(CEPH_I_WORK_VMTRUNCATE, &ci->i_work_mask))
+		__ceph_do_pending_vmtruncate(inode);
+
+	iput(inode);
+}
+
 /*
  * symlinks
  */
@@ -2244,42 +2277,72 @@ int ceph_permission(struct inode *inode, int mask)
 	return err;
 }
 
+/* Craft a mask of needed caps given a set of requested statx attrs. */
+static int statx_to_caps(u32 want)
+{
+	int mask = 0;
+
+	if (want & (STATX_MODE|STATX_UID|STATX_GID|STATX_CTIME))
+		mask |= CEPH_CAP_AUTH_SHARED;
+
+	if (want & (STATX_NLINK|STATX_CTIME))
+		mask |= CEPH_CAP_LINK_SHARED;
+
+	if (want & (STATX_ATIME|STATX_MTIME|STATX_CTIME|STATX_SIZE|
+		    STATX_BLOCKS))
+		mask |= CEPH_CAP_FILE_SHARED;
+
+	if (want & (STATX_CTIME))
+		mask |= CEPH_CAP_XATTR_SHARED;
+
+	return mask;
+}
+
 /*
- * Get all attributes.  Hopefully somedata we'll have a statlite()
- * and can limit the fields we require to be accurate.
+ * Get all the attributes. If we have sufficient caps for the requested attrs,
+ * then we can avoid talking to the MDS at all.
  */
 int ceph_getattr(const struct path *path, struct kstat *stat,
 		 u32 request_mask, unsigned int flags)
 {
 	struct inode *inode = d_inode(path->dentry);
 	struct ceph_inode_info *ci = ceph_inode(inode);
-	int err;
+	int err = 0;
 
-	err = ceph_do_getattr(inode, CEPH_STAT_CAP_INODE_ALL, false);
-	if (!err) {
-		generic_fillattr(inode, stat);
-		stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
-		if (ceph_snap(inode) != CEPH_NOSNAP)
-			stat->dev = ceph_snap(inode);
+	/* Skip the getattr altogether if we're asked not to sync */
+	if (!(flags & AT_STATX_DONT_SYNC)) {
+		err = ceph_do_getattr(inode, statx_to_caps(request_mask),
+				      flags & AT_STATX_FORCE_SYNC);
+		if (err)
+			return err;
+	}
+
+	generic_fillattr(inode, stat);
+	stat->ino = ceph_translate_ino(inode->i_sb, inode->i_ino);
+	if (ceph_snap(inode) == CEPH_NOSNAP)
+		stat->dev = inode->i_sb->s_dev;
+	else
+		stat->dev = ci->i_snapid_map ? ci->i_snapid_map->dev : 0;
+
+	if (S_ISDIR(inode->i_mode)) {
+		if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
+					RBYTES))
+			stat->size = ci->i_rbytes;
 		else
-			stat->dev = 0;
-		if (S_ISDIR(inode->i_mode)) {
-			if (ceph_test_mount_opt(ceph_sb_to_client(inode->i_sb),
-						RBYTES))
-				stat->size = ci->i_rbytes;
-			else
-				stat->size = ci->i_files + ci->i_subdirs;
-			stat->blocks = 0;
-			stat->blksize = 65536;
-			/*
-			 * Some applications rely on the number of st_nlink
-			 * value on directories to be either 0 (if unlinked)
-			 * or 2 + number of subdirectories.
-			 */
-			if (stat->nlink == 1)
-				/* '.' + '..' + subdirs */
-				stat->nlink = 1 + 1 + ci->i_subdirs;
-		}
+			stat->size = ci->i_files + ci->i_subdirs;
+		stat->blocks = 0;
+		stat->blksize = 65536;
+		/*
+		 * Some applications rely on the number of st_nlink
+		 * value on directories to be either 0 (if unlinked)
+		 * or 2 + number of subdirectories.
+		 */
+		if (stat->nlink == 1)
+			/* '.' + '..' + subdirs */
+			stat->nlink = 1 + 1 + ci->i_subdirs;
 	}
+
+	/* Mask off any higher bits (e.g. btime) until we have support */
+	stat->result_mask = request_mask & STATX_BASIC_STATS;
 	return err;
 }
diff --git a/fs/ceph/locks.c b/fs/ceph/locks.c
index 9dae2ec7e1fa..ac9b53b89365 100644
--- a/fs/ceph/locks.c
+++ b/fs/ceph/locks.c
@@ -237,15 +237,6 @@ int ceph_lock(struct file *file, int cmd, struct file_lock *fl)
 	spin_lock(&ci->i_ceph_lock);
 	if (ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) {
 		err = -EIO;
-	} else if (op == CEPH_MDS_OP_SETFILELOCK) {
-		/*
-		 * increasing i_filelock_ref closes race window between
-		 * handling request reply and adding file_lock struct to
-		 * inode. Otherwise, i_auth_cap may get trimmed in the
-		 * window. Caller function will decrease the counter.
-		 */
-		fl->fl_ops = &ceph_fl_lock_ops;
-		atomic_inc(&ci->i_filelock_ref);
 	}
 	spin_unlock(&ci->i_ceph_lock);
 	if (err < 0) {
@@ -299,10 +290,6 @@ int ceph_flock(struct file *file, int cmd, struct file_lock *fl)
 	spin_lock(&ci->i_ceph_lock);
 	if (ci->i_ceph_flags & CEPH_I_ERROR_FILELOCK) {
 		err = -EIO;
-	} else {
-		/* see comment in ceph_lock */
-		fl->fl_ops = &ceph_fl_lock_ops;
-		atomic_inc(&ci->i_filelock_ref);
 	}
 	spin_unlock(&ci->i_ceph_lock);
 	if (err < 0) {
diff --git a/fs/ceph/mds_client.c b/fs/ceph/mds_client.c
index 163fc74bf221..c8a9b89b922d 100644
--- a/fs/ceph/mds_client.c
+++ b/fs/ceph/mds_client.c
@@ -20,6 +20,8 @@
 #include <linux/ceph/auth.h>
 #include <linux/ceph/debugfs.h>
 
+#define RECONNECT_MAX_SIZE (INT_MAX - PAGE_SIZE)
+
 /*
  * A cluster of MDS (metadata server) daemons is responsible for
  * managing the file system namespace (the directory hierarchy and
@@ -46,13 +48,17 @@
  */
 
 struct ceph_reconnect_state {
-	int nr_caps;
+	struct ceph_mds_session *session;
+	int nr_caps, nr_realms;
 	struct ceph_pagelist *pagelist;
 	unsigned msg_version;
+	bool allow_multi;
 };
 
 static void __wake_requests(struct ceph_mds_client *mdsc,
 			    struct list_head *head);
+static void ceph_cap_release_work(struct work_struct *work);
+static void ceph_cap_reclaim_work(struct work_struct *work);
 
 static const struct ceph_connection_operations mds_con_ops;
 
@@ -61,6 +67,29 @@ static const struct ceph_connection_operations mds_con_ops;
  * mds reply parsing
  */
 
+static int parse_reply_info_quota(void **p, void *end,
+				  struct ceph_mds_reply_info_in *info)
+{
+	u8 struct_v, struct_compat;
+	u32 struct_len;
+
+	ceph_decode_8_safe(p, end, struct_v, bad);
+	ceph_decode_8_safe(p, end, struct_compat, bad);
+	/* struct_v is expected to be >= 1. we only
+	 * understand encoding with struct_compat == 1. */
+	if (!struct_v || struct_compat != 1)
+		goto bad;
+	ceph_decode_32_safe(p, end, struct_len, bad);
+	ceph_decode_need(p, end, struct_len, bad);
+	end = *p + struct_len;
+	ceph_decode_64_safe(p, end, info->max_bytes, bad);
+	ceph_decode_64_safe(p, end, info->max_files, bad);
+	*p = end;
+	return 0;
+bad:
+	return -EIO;
+}
+
 /*
  * parse individual inode info
  */
@@ -68,8 +97,24 @@ static int parse_reply_info_in(void **p, void *end,
 			       struct ceph_mds_reply_info_in *info,
 			       u64 features)
 {
-	int err = -EIO;
+	int err = 0;
+	u8 struct_v = 0;
 
+	if (features == (u64)-1) {
+		u32 struct_len;
+		u8 struct_compat;
+		ceph_decode_8_safe(p, end, struct_v, bad);
+		ceph_decode_8_safe(p, end, struct_compat, bad);
+		/* struct_v is expected to be >= 1. we only understand
+		 * encoding with struct_compat == 1. */
+		if (!struct_v || struct_compat != 1)
+			goto bad;
+		ceph_decode_32_safe(p, end, struct_len, bad);
+		ceph_decode_need(p, end, struct_len, bad);
+		end = *p + struct_len;
+	}
+
+	ceph_decode_need(p, end, sizeof(struct ceph_mds_reply_inode), bad);
 	info->in = *p;
 	*p += sizeof(struct ceph_mds_reply_inode) +
 		sizeof(*info->in->fragtree.splits) *
@@ -87,49 +132,136 @@ static int parse_reply_info_in(void **p, void *end,
 	info->xattr_data = *p;
 	*p += info->xattr_len;
 
-	if (features & CEPH_FEATURE_MDS_INLINE_DATA) {
+	if (features == (u64)-1) {
+		/* inline data */
 		ceph_decode_64_safe(p, end, info->inline_version, bad);
 		ceph_decode_32_safe(p, end, info->inline_len, bad);
 		ceph_decode_need(p, end, info->inline_len, bad);
 		info->inline_data = *p;
 		*p += info->inline_len;
-	} else
-		info->inline_version = CEPH_INLINE_NONE;
+		/* quota */
+		err = parse_reply_info_quota(p, end, info);
+		if (err < 0)
+			goto out_bad;
+		/* pool namespace */
+		ceph_decode_32_safe(p, end, info->pool_ns_len, bad);
+		if (info->pool_ns_len > 0) {
+			ceph_decode_need(p, end, info->pool_ns_len, bad);
+			info->pool_ns_data = *p;
+			*p += info->pool_ns_len;
+		}
+		/* btime, change_attr */
+		{
+			struct ceph_timespec btime;
+			u64 change_attr;
+			ceph_decode_need(p, end, sizeof(btime), bad);
+			ceph_decode_copy(p, &btime, sizeof(btime));
+			ceph_decode_64_safe(p, end, change_attr, bad);
+		}
+
+		/* dir pin */
+		if (struct_v >= 2) {
+			ceph_decode_32_safe(p, end, info->dir_pin, bad);
+		} else {
+			info->dir_pin = -ENODATA;
+		}
+
+		*p = end;
+	} else {
+		if (features & CEPH_FEATURE_MDS_INLINE_DATA) {
+			ceph_decode_64_safe(p, end, info->inline_version, bad);
+			ceph_decode_32_safe(p, end, info->inline_len, bad);
+			ceph_decode_need(p, end, info->inline_len, bad);
+			info->inline_data = *p;
+			*p += info->inline_len;
+		} else
+			info->inline_version = CEPH_INLINE_NONE;
+
+		if (features & CEPH_FEATURE_MDS_QUOTA) {
+			err = parse_reply_info_quota(p, end, info);
+			if (err < 0)
+				goto out_bad;
+		} else {
+			info->max_bytes = 0;
+			info->max_files = 0;
+		}
+
+		info->pool_ns_len = 0;
+		info->pool_ns_data = NULL;
+		if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) {
+			ceph_decode_32_safe(p, end, info->pool_ns_len, bad);
+			if (info->pool_ns_len > 0) {
+				ceph_decode_need(p, end, info->pool_ns_len, bad);
+				info->pool_ns_data = *p;
+				*p += info->pool_ns_len;
+			}
+		}
+
+		info->dir_pin = -ENODATA;
+	}
+	return 0;
+bad:
+	err = -EIO;
+out_bad:
+	return err;
+}
 
-	if (features & CEPH_FEATURE_MDS_QUOTA) {
+static int parse_reply_info_dir(void **p, void *end,
+				struct ceph_mds_reply_dirfrag **dirfrag,
+				u64 features)
+{
+	if (features == (u64)-1) {
 		u8 struct_v, struct_compat;
 		u32 struct_len;
-
-		/*
-		 * both struct_v and struct_compat are expected to be >= 1
-		 */
 		ceph_decode_8_safe(p, end, struct_v, bad);
 		ceph_decode_8_safe(p, end, struct_compat, bad);
-		if (!struct_v || !struct_compat)
+		/* struct_v is expected to be >= 1. we only understand
+		 * encoding whose struct_compat == 1. */
+		if (!struct_v || struct_compat != 1)
 			goto bad;
 		ceph_decode_32_safe(p, end, struct_len, bad);
 		ceph_decode_need(p, end, struct_len, bad);
-		ceph_decode_64_safe(p, end, info->max_bytes, bad);
-		ceph_decode_64_safe(p, end, info->max_files, bad);
-	} else {
-		info->max_bytes = 0;
-		info->max_files = 0;
+		end = *p + struct_len;
 	}
 
-	info->pool_ns_len = 0;
-	info->pool_ns_data = NULL;
-	if (features & CEPH_FEATURE_FS_FILE_LAYOUT_V2) {
-		ceph_decode_32_safe(p, end, info->pool_ns_len, bad);
-		if (info->pool_ns_len > 0) {
-			ceph_decode_need(p, end, info->pool_ns_len, bad);
-			info->pool_ns_data = *p;
-			*p += info->pool_ns_len;
-		}
+	ceph_decode_need(p, end, sizeof(**dirfrag), bad);
+	*dirfrag = *p;
+	*p += sizeof(**dirfrag) + sizeof(u32) * le32_to_cpu((*dirfrag)->ndist);
+	if (unlikely(*p > end))
+		goto bad;
+	if (features == (u64)-1)
+		*p = end;
+	return 0;
+bad:
+	return -EIO;
+}
+
+static int parse_reply_info_lease(void **p, void *end,
+				  struct ceph_mds_reply_lease **lease,
+				  u64 features)
+{
+	if (features == (u64)-1) {
+		u8 struct_v, struct_compat;
+		u32 struct_len;
+		ceph_decode_8_safe(p, end, struct_v, bad);
+		ceph_decode_8_safe(p, end, struct_compat, bad);
+		/* struct_v is expected to be >= 1. we only understand
+		 * encoding whose struct_compat == 1. */
+		if (!struct_v || struct_compat != 1)
+			goto bad;
+		ceph_decode_32_safe(p, end, struct_len, bad);
+		ceph_decode_need(p, end, struct_len, bad);
+		end = *p + struct_len;
 	}
 
+	ceph_decode_need(p, end, sizeof(**lease), bad);
+	*lease = *p;
+	*p += sizeof(**lease);
+	if (features == (u64)-1)
+		*p = end;
 	return 0;
 bad:
-	return err;
+	return -EIO;
 }
 
 /*
@@ -147,20 +279,18 @@ static int parse_reply_info_trace(void **p, void *end,
 		if (err < 0)
 			goto out_bad;
 
-		if (unlikely(*p + sizeof(*info->dirfrag) > end))
-			goto bad;
-		info->dirfrag = *p;
-		*p += sizeof(*info->dirfrag) +
-			sizeof(u32)*le32_to_cpu(info->dirfrag->ndist);
-		if (unlikely(*p > end))
-			goto bad;
+		err = parse_reply_info_dir(p, end, &info->dirfrag, features);
+		if (err < 0)
+			goto out_bad;
 
 		ceph_decode_32_safe(p, end, info->dname_len, bad);
 		ceph_decode_need(p, end, info->dname_len, bad);
 		info->dname = *p;
 		*p += info->dname_len;
-		info->dlease = *p;
-		*p += sizeof(*info->dlease);
+
+		err = parse_reply_info_lease(p, end, &info->dlease, features);
+		if (err < 0)
+			goto out_bad;
 	}
 
 	if (info->head->is_target) {
@@ -183,20 +313,16 @@ out_bad:
 /*
  * parse readdir results
  */
-static int parse_reply_info_dir(void **p, void *end,
+static int parse_reply_info_readdir(void **p, void *end,
 				struct ceph_mds_reply_info_parsed *info,
 				u64 features)
 {
 	u32 num, i = 0;
 	int err;
 
-	info->dir_dir = *p;
-	if (*p + sizeof(*info->dir_dir) > end)
-		goto bad;
-	*p += sizeof(*info->dir_dir) +
-		sizeof(u32)*le32_to_cpu(info->dir_dir->ndist);
-	if (*p > end)
-		goto bad;
+	err = parse_reply_info_dir(p, end, &info->dir_dir, features);
+	if (err < 0)
+		goto out_bad;
 
 	ceph_decode_need(p, end, sizeof(num) + 2, bad);
 	num = ceph_decode_32(p);
@@ -222,15 +348,16 @@ static int parse_reply_info_dir(void **p, void *end,
 	while (num) {
 		struct ceph_mds_reply_dir_entry *rde = info->dir_entries + i;
 		/* dentry */
-		ceph_decode_need(p, end, sizeof(u32)*2, bad);
-		rde->name_len = ceph_decode_32(p);
+		ceph_decode_32_safe(p, end, rde->name_len, bad);
 		ceph_decode_need(p, end, rde->name_len, bad);
 		rde->name = *p;
 		*p += rde->name_len;
 		dout("parsed dir dname '%.*s'\n", rde->name_len, rde->name);
-		rde->lease = *p;
-		*p += sizeof(struct ceph_mds_reply_lease);
 
+		/* dentry lease */
+		err = parse_reply_info_lease(p, end, &rde->lease, features);
+		if (err)
+			goto out_bad;
 		/* inode */
 		err = parse_reply_info_in(p, end, &rde->inode, features);
 		if (err < 0)
@@ -281,7 +408,8 @@ static int parse_reply_info_create(void **p, void *end,
 				  struct ceph_mds_reply_info_parsed *info,
 				  u64 features)
 {
-	if (features & CEPH_FEATURE_REPLY_CREATE_INODE) {
+	if (features == (u64)-1 ||
+	    (features & CEPH_FEATURE_REPLY_CREATE_INODE)) {
 		if (*p == end) {
 			info->has_create_ino = false;
 		} else {
@@ -310,7 +438,7 @@ static int parse_reply_info_extra(void **p, void *end,
 	if (op == CEPH_MDS_OP_GETFILELOCK)
 		return parse_reply_info_filelock(p, end, info, features);
 	else if (op == CEPH_MDS_OP_READDIR || op == CEPH_MDS_OP_LSSNAP)
-		return parse_reply_info_dir(p, end, info, features);
+		return parse_reply_info_readdir(p, end, info, features);
 	else if (op == CEPH_MDS_OP_CREATE)
 		return parse_reply_info_create(p, end, info, features);
 	else
@@ -422,15 +550,9 @@ void ceph_put_mds_session(struct ceph_mds_session *s)
 struct ceph_mds_session *__ceph_lookup_mds_session(struct ceph_mds_client *mdsc,
 						   int mds)
 {
-	struct ceph_mds_session *session;
-
 	if (mds >= mdsc->max_sessions || !mdsc->sessions[mds])
 		return NULL;
-	session = mdsc->sessions[mds];
-	dout("lookup_mds_session %p %d\n", session,
-	     refcount_read(&session->s_ref));
-	get_session(session);
-	return session;
+	return get_session(mdsc->sessions[mds]);
 }
 
 static bool __have_session(struct ceph_mds_client *mdsc, int mds)
@@ -494,7 +616,7 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
 	ceph_con_init(&s->s_con, s, &mds_con_ops, &mdsc->fsc->client->msgr);
 
 	spin_lock_init(&s->s_gen_ttl_lock);
-	s->s_cap_gen = 0;
+	s->s_cap_gen = 1;
 	s->s_cap_ttl = jiffies - 1;
 
 	spin_lock_init(&s->s_cap_lock);
@@ -510,6 +632,8 @@ static struct ceph_mds_session *register_session(struct ceph_mds_client *mdsc,
 	s->s_cap_reconnect = 0;
 	s->s_cap_iterator = NULL;
 	INIT_LIST_HEAD(&s->s_cap_releases);
+	INIT_WORK(&s->s_cap_release_work, ceph_cap_release_work);
+
 	INIT_LIST_HEAD(&s->s_cap_flushing);
 
 	mdsc->sessions[mds] = s;
@@ -535,6 +659,7 @@ static void __unregister_session(struct ceph_mds_client *mdsc,
 	dout("__unregister_session mds%d %p\n", s->s_mds, s);
 	BUG_ON(mdsc->sessions[s->s_mds] != s);
 	mdsc->sessions[s->s_mds] = NULL;
+	s->s_state = 0;
 	ceph_con_close(&s->s_con);
 	ceph_put_mds_session(s);
 	atomic_dec(&mdsc->num_sessions);
@@ -565,11 +690,12 @@ void ceph_mdsc_release_request(struct kref *kref)
 		ceph_msg_put(req->r_reply);
 	if (req->r_inode) {
 		ceph_put_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN);
-		iput(req->r_inode);
+		/* avoid calling iput_final() in mds dispatch threads */
+		ceph_async_iput(req->r_inode);
 	}
 	if (req->r_parent)
 		ceph_put_cap_refs(ceph_inode(req->r_parent), CEPH_CAP_PIN);
-	iput(req->r_target_inode);
+	ceph_async_iput(req->r_target_inode);
 	if (req->r_dentry)
 		dput(req->r_dentry);
 	if (req->r_old_dentry)
@@ -583,7 +709,7 @@ void ceph_mdsc_release_request(struct kref *kref)
 		 */
 		ceph_put_cap_refs(ceph_inode(req->r_old_dentry_dir),
 				  CEPH_CAP_PIN);
-		iput(req->r_old_dentry_dir);
+		ceph_async_iput(req->r_old_dentry_dir);
 	}
 	kfree(req->r_path1);
 	kfree(req->r_path2);
@@ -693,7 +819,8 @@ static void __unregister_request(struct ceph_mds_client *mdsc,
 	}
 
 	if (req->r_unsafe_dir) {
-		iput(req->r_unsafe_dir);
+		/* avoid calling iput_final() in mds dispatch threads */
+		ceph_async_iput(req->r_unsafe_dir);
 		req->r_unsafe_dir = NULL;
 	}
 
@@ -858,7 +985,7 @@ static int __choose_mds(struct ceph_mds_client *mdsc,
 		cap = rb_entry(rb_first(&ci->i_caps), struct ceph_cap, ci_node);
 	if (!cap) {
 		spin_unlock(&ci->i_ceph_lock);
-		iput(inode);
+		ceph_async_iput(inode);
 		goto random;
 	}
 	mds = cap->session->s_mds;
@@ -867,7 +994,9 @@ static int __choose_mds(struct ceph_mds_client *mdsc,
 	     cap == ci->i_auth_cap ? "auth " : "", cap);
 	spin_unlock(&ci->i_ceph_lock);
 out:
-	iput(inode);
+	/* avoid calling iput_final() while holding mdsc->mutex or
+	 * in mds dispatch threads */
+	ceph_async_iput(inode);
 	return mds;
 
 random:
@@ -1153,9 +1282,9 @@ static void cleanup_session_requests(struct ceph_mds_client *mdsc,
  *
  * Caller must hold session s_mutex.
  */
-static int iterate_session_caps(struct ceph_mds_session *session,
-				 int (*cb)(struct inode *, struct ceph_cap *,
-					    void *), void *arg)
+int ceph_iterate_session_caps(struct ceph_mds_session *session,
+			      int (*cb)(struct inode *, struct ceph_cap *,
+					void *), void *arg)
 {
 	struct list_head *p;
 	struct ceph_cap *cap;
@@ -1177,7 +1306,9 @@ static int iterate_session_caps(struct ceph_mds_session *session,
 		spin_unlock(&session->s_cap_lock);
 
 		if (last_inode) {
-			iput(last_inode);
+			/* avoid calling iput_final() while holding
+			 * s_mutex or in mds dispatch threads */
+			ceph_async_iput(last_inode);
 			last_inode = NULL;
 		}
 		if (old_cap) {
@@ -1197,13 +1328,10 @@ static int iterate_session_caps(struct ceph_mds_session *session,
 			cap->session = NULL;
 			list_del_init(&cap->session_caps);
 			session->s_nr_caps--;
-			if (cap->queue_release) {
-				list_add_tail(&cap->session_caps,
-					      &session->s_cap_releases);
-				session->s_num_cap_releases++;
-			} else {
+			if (cap->queue_release)
+				__ceph_queue_cap_release(session, cap);
+			else
 				old_cap = cap;  /* put_cap it w/o locks held */
-			}
 		}
 		if (ret < 0)
 			goto out;
@@ -1213,7 +1341,7 @@ out:
 	session->s_cap_iterator = NULL;
 	spin_unlock(&session->s_cap_lock);
 
-	iput(last_inode);
+	ceph_async_iput(last_inode);
 	if (old_cap)
 		ceph_put_cap(session->s_mdsc, old_cap);
 
@@ -1286,6 +1414,15 @@ static int remove_session_caps_cb(struct inode *inode, struct ceph_cap *cap,
 			list_add(&ci->i_prealloc_cap_flush->i_list, &to_remove);
 			ci->i_prealloc_cap_flush = NULL;
 		}
+
+               if (drop &&
+                  ci->i_wrbuffer_ref_head == 0 &&
+                  ci->i_wr_ref == 0 &&
+                  ci->i_dirty_caps == 0 &&
+                  ci->i_flushing_caps == 0) {
+                      ceph_put_snap_context(ci->i_head_snapc);
+                      ci->i_head_snapc = NULL;
+               }
 	}
 	spin_unlock(&ci->i_ceph_lock);
 	while (!list_empty(&to_remove)) {
@@ -1314,7 +1451,7 @@ static void remove_session_caps(struct ceph_mds_session *session)
 	LIST_HEAD(dispose);
 
 	dout("remove_session_caps on %p\n", session);
-	iterate_session_caps(session, remove_session_caps_cb, fsc);
+	ceph_iterate_session_caps(session, remove_session_caps_cb, fsc);
 
 	wake_up_all(&fsc->mdsc->cap_flushing_wq);
 
@@ -1340,7 +1477,8 @@ static void remove_session_caps(struct ceph_mds_session *session)
 			spin_unlock(&session->s_cap_lock);
 
 			inode = ceph_find_inode(sb, vino);
-			iput(inode);
+			 /* avoid calling iput_final() while holding s_mutex */
+			ceph_async_iput(inode);
 
 			spin_lock(&session->s_cap_lock);
 		}
@@ -1397,8 +1535,8 @@ static int wake_up_session_cb(struct inode *inode, struct ceph_cap *cap,
 static void wake_up_session_caps(struct ceph_mds_session *session, int ev)
 {
 	dout("wake_up_session_caps %p mds%d\n", session, session->s_mds);
-	iterate_session_caps(session, wake_up_session_cb,
-			     (void *)(unsigned long)ev);
+	ceph_iterate_session_caps(session, wake_up_session_cb,
+				  (void *)(unsigned long)ev);
 }
 
 /*
@@ -1631,14 +1769,14 @@ int ceph_trim_caps(struct ceph_mds_client *mdsc,
 	     session->s_mds, session->s_nr_caps, max_caps, trim_caps);
 	if (trim_caps > 0) {
 		session->s_trim_caps = trim_caps;
-		iterate_session_caps(session, trim_caps_cb, session);
+		ceph_iterate_session_caps(session, trim_caps_cb, session);
 		dout("trim_caps mds%d done: %d / %d, trimmed %d\n",
 		     session->s_mds, session->s_nr_caps, max_caps,
 			trim_caps - session->s_trim_caps);
 		session->s_trim_caps = 0;
 	}
 
-	ceph_send_cap_releases(mdsc, session);
+	ceph_flush_cap_releases(mdsc, session);
 	return 0;
 }
 
@@ -1681,8 +1819,8 @@ static void wait_caps_flush(struct ceph_mds_client *mdsc,
 /*
  * called under s_mutex
  */
-void ceph_send_cap_releases(struct ceph_mds_client *mdsc,
-			    struct ceph_mds_session *session)
+static void ceph_send_cap_releases(struct ceph_mds_client *mdsc,
+				   struct ceph_mds_session *session)
 {
 	struct ceph_msg *msg = NULL;
 	struct ceph_mds_cap_release *head;
@@ -1724,7 +1862,8 @@ again:
 		num_cap_releases--;
 
 		head = msg->front.iov_base;
-		le32_add_cpu(&head->num, 1);
+		put_unaligned_le32(get_unaligned_le32(&head->num) + 1,
+				   &head->num);
 		item = msg->front.iov_base + msg->front.iov_len;
 		item->ino = cpu_to_le64(cap->cap_ino);
 		item->cap_id = cpu_to_le64(cap->cap_id);
@@ -1774,6 +1913,81 @@ out_err:
 	spin_unlock(&session->s_cap_lock);
 }
 
+static void ceph_cap_release_work(struct work_struct *work)
+{
+	struct ceph_mds_session *session =
+		container_of(work, struct ceph_mds_session, s_cap_release_work);
+
+	mutex_lock(&session->s_mutex);
+	if (session->s_state == CEPH_MDS_SESSION_OPEN ||
+	    session->s_state == CEPH_MDS_SESSION_HUNG)
+		ceph_send_cap_releases(session->s_mdsc, session);
+	mutex_unlock(&session->s_mutex);
+	ceph_put_mds_session(session);
+}
+
+void ceph_flush_cap_releases(struct ceph_mds_client *mdsc,
+		             struct ceph_mds_session *session)
+{
+	if (mdsc->stopping)
+		return;
+
+	get_session(session);
+	if (queue_work(mdsc->fsc->cap_wq,
+		       &session->s_cap_release_work)) {
+		dout("cap release work queued\n");
+	} else {
+		ceph_put_mds_session(session);
+		dout("failed to queue cap release work\n");
+	}
+}
+
+/*
+ * caller holds session->s_cap_lock
+ */
+void __ceph_queue_cap_release(struct ceph_mds_session *session,
+			      struct ceph_cap *cap)
+{
+	list_add_tail(&cap->session_caps, &session->s_cap_releases);
+	session->s_num_cap_releases++;
+
+	if (!(session->s_num_cap_releases % CEPH_CAPS_PER_RELEASE))
+		ceph_flush_cap_releases(session->s_mdsc, session);
+}
+
+static void ceph_cap_reclaim_work(struct work_struct *work)
+{
+	struct ceph_mds_client *mdsc =
+		container_of(work, struct ceph_mds_client, cap_reclaim_work);
+	int ret = ceph_trim_dentries(mdsc);
+	if (ret == -EAGAIN)
+		ceph_queue_cap_reclaim_work(mdsc);
+}
+
+void ceph_queue_cap_reclaim_work(struct ceph_mds_client *mdsc)
+{
+	if (mdsc->stopping)
+		return;
+
+        if (queue_work(mdsc->fsc->cap_wq, &mdsc->cap_reclaim_work)) {
+                dout("caps reclaim work queued\n");
+        } else {
+                dout("failed to queue caps release work\n");
+        }
+}
+
+void ceph_reclaim_caps_nr(struct ceph_mds_client *mdsc, int nr)
+{
+	int val;
+	if (!nr)
+		return;
+	val = atomic_add_return(nr, &mdsc->cap_reclaim_pending);
+	if (!(val % CEPH_CAPS_PER_RELEASE)) {
+		atomic_set(&mdsc->cap_reclaim_pending, 0);
+		ceph_queue_cap_reclaim_work(mdsc);
+	}
+}
+
 /*
  * requests
  */
@@ -1877,43 +2091,29 @@ static inline  u64 __get_oldest_tid(struct ceph_mds_client *mdsc)
  * Encode hidden .snap dirs as a double /, i.e.
  *   foo/.snap/bar -> foo//bar
  */
-char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *base,
+char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *pbase,
 			   int stop_on_nosnap)
 {
 	struct dentry *temp;
 	char *path;
-	int len, pos;
+	int pos;
 	unsigned seq;
+	u64 base;
 
 	if (!dentry)
 		return ERR_PTR(-EINVAL);
 
-retry:
-	len = 0;
-	seq = read_seqbegin(&rename_lock);
-	rcu_read_lock();
-	for (temp = dentry; !IS_ROOT(temp);) {
-		struct inode *inode = d_inode(temp);
-		if (inode && ceph_snap(inode) == CEPH_SNAPDIR)
-			len++;  /* slash only */
-		else if (stop_on_nosnap && inode &&
-			 ceph_snap(inode) == CEPH_NOSNAP)
-			break;
-		else
-			len += 1 + temp->d_name.len;
-		temp = temp->d_parent;
-	}
-	rcu_read_unlock();
-	if (len)
-		len--;  /* no leading '/' */
-
-	path = kmalloc(len+1, GFP_NOFS);
+	path = __getname();
 	if (!path)
 		return ERR_PTR(-ENOMEM);
-	pos = len;
-	path[pos] = 0;	/* trailing null */
+retry:
+	pos = PATH_MAX - 1;
+	path[pos] = '\0';
+
+	seq = read_seqbegin(&rename_lock);
 	rcu_read_lock();
-	for (temp = dentry; !IS_ROOT(temp) && pos != 0; ) {
+	temp = dentry;
+	for (;;) {
 		struct inode *inode;
 
 		spin_lock(&temp->d_lock);
@@ -1921,9 +2121,10 @@ retry:
 		if (inode && ceph_snap(inode) == CEPH_SNAPDIR) {
 			dout("build_path path+%d: %p SNAPDIR\n",
 			     pos, temp);
-		} else if (stop_on_nosnap && inode &&
+		} else if (stop_on_nosnap && inode && dentry != temp &&
 			   ceph_snap(inode) == CEPH_NOSNAP) {
 			spin_unlock(&temp->d_lock);
+			pos++; /* get rid of any prepended '/' */
 			break;
 		} else {
 			pos -= temp->d_name.len;
@@ -1931,43 +2132,50 @@ retry:
 				spin_unlock(&temp->d_lock);
 				break;
 			}
-			strncpy(path + pos, temp->d_name.name,
-				temp->d_name.len);
+			memcpy(path + pos, temp->d_name.name, temp->d_name.len);
 		}
 		spin_unlock(&temp->d_lock);
-		if (pos)
-			path[--pos] = '/';
 		temp = temp->d_parent;
+
+		/* Are we at the root? */
+		if (IS_ROOT(temp))
+			break;
+
+		/* Are we out of buffer? */
+		if (--pos < 0)
+			break;
+
+		path[pos] = '/';
 	}
+	base = ceph_ino(d_inode(temp));
 	rcu_read_unlock();
-	if (pos != 0 || read_seqretry(&rename_lock, seq)) {
+	if (pos < 0 || read_seqretry(&rename_lock, seq)) {
 		pr_err("build_path did not end path lookup where "
-		       "expected, namelen is %d, pos is %d\n", len, pos);
+		       "expected, pos is %d\n", pos);
 		/* presumably this is only possible if racing with a
 		   rename of one of the parent directories (we can not
 		   lock the dentries above us to prevent this, but
 		   retrying should be harmless) */
-		kfree(path);
 		goto retry;
 	}
 
-	*base = ceph_ino(d_inode(temp));
-	*plen = len;
+	*pbase = base;
+	*plen = PATH_MAX - 1 - pos;
 	dout("build_path on %p %d built %llx '%.*s'\n",
-	     dentry, d_count(dentry), *base, len, path);
-	return path;
+	     dentry, d_count(dentry), base, *plen, path + pos);
+	return path + pos;
 }
 
 static int build_dentry_path(struct dentry *dentry, struct inode *dir,
 			     const char **ppath, int *ppathlen, u64 *pino,
-			     int *pfreepath)
+			     bool *pfreepath, bool parent_locked)
 {
 	char *path;
 
 	rcu_read_lock();
 	if (!dir)
 		dir = d_inode_rcu(dentry->d_parent);
-	if (dir && ceph_snap(dir) == CEPH_NOSNAP) {
+	if (dir && parent_locked && ceph_snap(dir) == CEPH_NOSNAP) {
 		*pino = ceph_ino(dir);
 		rcu_read_unlock();
 		*ppath = dentry->d_name.name;
@@ -1979,13 +2187,13 @@ static int build_dentry_path(struct dentry *dentry, struct inode *dir,
 	if (IS_ERR(path))
 		return PTR_ERR(path);
 	*ppath = path;
-	*pfreepath = 1;
+	*pfreepath = true;
 	return 0;
 }
 
 static int build_inode_path(struct inode *inode,
 			    const char **ppath, int *ppathlen, u64 *pino,
-			    int *pfreepath)
+			    bool *pfreepath)
 {
 	struct dentry *dentry;
 	char *path;
@@ -2001,7 +2209,7 @@ static int build_inode_path(struct inode *inode,
 	if (IS_ERR(path))
 		return PTR_ERR(path);
 	*ppath = path;
-	*pfreepath = 1;
+	*pfreepath = true;
 	return 0;
 }
 
@@ -2012,7 +2220,7 @@ static int build_inode_path(struct inode *inode,
 static int set_request_path_attr(struct inode *rinode, struct dentry *rdentry,
 				  struct inode *rdiri, const char *rpath,
 				  u64 rino, const char **ppath, int *pathlen,
-				  u64 *ino, int *freepath)
+				  u64 *ino, bool *freepath, bool parent_locked)
 {
 	int r = 0;
 
@@ -2022,7 +2230,7 @@ static int set_request_path_attr(struct inode *rinode, struct dentry *rdentry,
 		     ceph_snap(rinode));
 	} else if (rdentry) {
 		r = build_dentry_path(rdentry, rdiri, ppath, pathlen, ino,
-					freepath);
+					freepath, parent_locked);
 		dout(" dentry %p %llx/%.*s\n", rdentry, *ino, *pathlen,
 		     *ppath);
 	} else if (rpath || rino) {
@@ -2048,7 +2256,7 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
 	const char *path2 = NULL;
 	u64 ino1 = 0, ino2 = 0;
 	int pathlen1 = 0, pathlen2 = 0;
-	int freepath1 = 0, freepath2 = 0;
+	bool freepath1 = false, freepath2 = false;
 	int len;
 	u16 releases;
 	void *p, *end;
@@ -2056,16 +2264,19 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
 
 	ret = set_request_path_attr(req->r_inode, req->r_dentry,
 			      req->r_parent, req->r_path1, req->r_ino1.ino,
-			      &path1, &pathlen1, &ino1, &freepath1);
+			      &path1, &pathlen1, &ino1, &freepath1,
+			      test_bit(CEPH_MDS_R_PARENT_LOCKED,
+					&req->r_req_flags));
 	if (ret < 0) {
 		msg = ERR_PTR(ret);
 		goto out;
 	}
 
+	/* If r_old_dentry is set, then assume that its parent is locked */
 	ret = set_request_path_attr(NULL, req->r_old_dentry,
 			      req->r_old_dentry_dir,
 			      req->r_path2, req->r_ino2.ino,
-			      &path2, &pathlen2, &ino2, &freepath2);
+			      &path2, &pathlen2, &ino2, &freepath2, true);
 	if (ret < 0) {
 		msg = ERR_PTR(ret);
 		goto out_free1;
@@ -2080,9 +2291,9 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
 		(!!req->r_inode_drop + !!req->r_dentry_drop +
 		 !!req->r_old_inode_drop + !!req->r_old_dentry_drop);
 	if (req->r_dentry_drop)
-		len += req->r_dentry->d_name.len;
+		len += pathlen1;
 	if (req->r_old_dentry_drop)
-		len += req->r_old_dentry->d_name.len;
+		len += pathlen2;
 
 	msg = ceph_msg_new2(CEPH_MSG_CLIENT_REQUEST, len, 1, GFP_NOFS, false);
 	if (!msg) {
@@ -2159,10 +2370,10 @@ static struct ceph_msg *create_request_message(struct ceph_mds_client *mdsc,
 
 out_free2:
 	if (freepath2)
-		kfree((char *)path2);
+		ceph_mdsc_free_path((char *)path2, pathlen2);
 out_free1:
 	if (freepath1)
-		kfree((char *)path1);
+		ceph_mdsc_free_path((char *)path1, pathlen1);
 out:
 	return msg;
 }
@@ -2176,8 +2387,7 @@ static void complete_request(struct ceph_mds_client *mdsc,
 {
 	if (req->r_callback)
 		req->r_callback(mdsc, req);
-	else
-		complete_all(&req->r_completion);
+	complete_all(&req->r_completion);
 }
 
 /*
@@ -2419,28 +2629,11 @@ static void kick_requests(struct ceph_mds_client *mdsc, int mds)
 	}
 }
 
-void ceph_mdsc_submit_request(struct ceph_mds_client *mdsc,
+int ceph_mdsc_submit_request(struct ceph_mds_client *mdsc, struct inode *dir,
 			      struct ceph_mds_request *req)
 {
-	dout("submit_request on %p\n", req);
-	mutex_lock(&mdsc->mutex);
-	__register_request(mdsc, req, NULL);
-	__do_request(mdsc, req);
-	mutex_unlock(&mdsc->mutex);
-}
-
-/*
- * Synchrously perform an mds request.  Take care of all of the
- * session setup, forwarding, retry details.
- */
-int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
-			 struct inode *dir,
-			 struct ceph_mds_request *req)
-{
 	int err;
 
-	dout("do_request on %p\n", req);
-
 	/* take CAP_PIN refs for r_inode, r_parent, r_old_dentry */
 	if (req->r_inode)
 		ceph_get_cap_refs(ceph_inode(req->r_inode), CEPH_CAP_PIN);
@@ -2450,18 +2643,21 @@ int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
 		ceph_get_cap_refs(ceph_inode(req->r_old_dentry_dir),
 				  CEPH_CAP_PIN);
 
-	/* issue */
+	dout("submit_request on %p for inode %p\n", req, dir);
 	mutex_lock(&mdsc->mutex);
 	__register_request(mdsc, req, dir);
 	__do_request(mdsc, req);
+	err = req->r_err;
+	mutex_unlock(&mdsc->mutex);
+	return err;
+}
 
-	if (req->r_err) {
-		err = req->r_err;
-		goto out;
-	}
+static int ceph_mdsc_wait_request(struct ceph_mds_client *mdsc,
+				  struct ceph_mds_request *req)
+{
+	int err;
 
 	/* wait */
-	mutex_unlock(&mdsc->mutex);
 	dout("do_request waiting\n");
 	if (!req->r_timeout && req->r_wait_for_completion) {
 		err = req->r_wait_for_completion(mdsc, req);
@@ -2502,8 +2698,26 @@ int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
 		err = req->r_err;
 	}
 
-out:
 	mutex_unlock(&mdsc->mutex);
+	return err;
+}
+
+/*
+ * Synchrously perform an mds request.  Take care of all of the
+ * session setup, forwarding, retry details.
+ */
+int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
+			 struct inode *dir,
+			 struct ceph_mds_request *req)
+{
+	int err;
+
+	dout("do_request on %p\n", req);
+
+	/* issue */
+	err = ceph_mdsc_submit_request(mdsc, dir, req);
+	if (!err)
+		err = ceph_mdsc_wait_request(mdsc, req);
 	dout("do_request %p done, result %d\n", req, err);
 	return err;
 }
@@ -2653,7 +2867,10 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
 
 	dout("handle_reply tid %lld result %d\n", tid, result);
 	rinfo = &req->r_reply_info;
-	err = parse_reply_info(msg, rinfo, session->s_con.peer_features);
+	if (test_bit(CEPHFS_FEATURE_REPLY_ENCODING, &session->s_features))
+		err = parse_reply_info(msg, rinfo, (u64)-1);
+	else
+		err = parse_reply_info(msg, rinfo, session->s_con.peer_features);
 	mutex_unlock(&mdsc->mutex);
 
 	mutex_lock(&session->s_mutex);
@@ -2684,7 +2901,6 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
 		if (result == 0 && (req->r_op == CEPH_MDS_OP_READDIR ||
 				    req->r_op == CEPH_MDS_OP_LSSNAP))
 			ceph_readdir_prepopulate(req, req->r_session);
-		ceph_unreserve_caps(mdsc, &req->r_caps_reservation);
 	}
 	current->journal_info = NULL;
 	mutex_unlock(&req->r_fill_mutex);
@@ -2693,12 +2909,18 @@ static void handle_reply(struct ceph_mds_session *session, struct ceph_msg *msg)
 	if (realm)
 		ceph_put_snap_realm(mdsc, realm);
 
-	if (err == 0 && req->r_target_inode &&
-	    test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) {
-		struct ceph_inode_info *ci = ceph_inode(req->r_target_inode);
-		spin_lock(&ci->i_unsafe_lock);
-		list_add_tail(&req->r_unsafe_target_item, &ci->i_unsafe_iops);
-		spin_unlock(&ci->i_unsafe_lock);
+	if (err == 0) {
+		if (req->r_target_inode &&
+		    test_bit(CEPH_MDS_R_GOT_UNSAFE, &req->r_req_flags)) {
+			struct ceph_inode_info *ci =
+				ceph_inode(req->r_target_inode);
+			spin_lock(&ci->i_unsafe_lock);
+			list_add_tail(&req->r_unsafe_target_item,
+				      &ci->i_unsafe_iops);
+			spin_unlock(&ci->i_unsafe_lock);
+		}
+
+		ceph_unreserve_caps(mdsc, &req->r_caps_reservation);
 	}
 out_err:
 	mutex_lock(&mdsc->mutex);
@@ -2777,6 +2999,25 @@ bad:
 	pr_err("mdsc_handle_forward decode error err=%d\n", err);
 }
 
+static int __decode_and_drop_session_metadata(void **p, void *end)
+{
+	/* map<string,string> */
+	u32 n;
+	ceph_decode_32_safe(p, end, n, bad);
+	while (n-- > 0) {
+		u32 len;
+		ceph_decode_32_safe(p, end, len, bad);
+		ceph_decode_need(p, end, len, bad);
+		*p += len;
+		ceph_decode_32_safe(p, end, len, bad);
+		ceph_decode_need(p, end, len, bad);
+		*p += len;
+	}
+	return 0;
+bad:
+	return -1;
+}
+
 /*
  * handle a mds session control message
  */
@@ -2784,18 +3025,36 @@ static void handle_session(struct ceph_mds_session *session,
 			   struct ceph_msg *msg)
 {
 	struct ceph_mds_client *mdsc = session->s_mdsc;
+	int mds = session->s_mds;
+	int msg_version = le16_to_cpu(msg->hdr.version);
+	void *p = msg->front.iov_base;
+	void *end = p + msg->front.iov_len;
+	struct ceph_mds_session_head *h;
 	u32 op;
 	u64 seq;
-	int mds = session->s_mds;
-	struct ceph_mds_session_head *h = msg->front.iov_base;
+	unsigned long features = 0;
 	int wake = 0;
 
 	/* decode */
-	if (msg->front.iov_len < sizeof(*h))
-		goto bad;
+	ceph_decode_need(&p, end, sizeof(*h), bad);
+	h = p;
+	p += sizeof(*h);
+
 	op = le32_to_cpu(h->op);
 	seq = le64_to_cpu(h->seq);
 
+	if (msg_version >= 3) {
+		u32 len;
+		/* version >= 2, metadata */
+		if (__decode_and_drop_session_metadata(&p, end) < 0)
+			goto bad;
+		/* version >= 3, feature bits */
+		ceph_decode_32_safe(&p, end, len, bad);
+		ceph_decode_need(&p, end, len, bad);
+		memcpy(&features, p, min_t(size_t, len, sizeof(features)));
+		p += len;
+	}
+
 	mutex_lock(&mdsc->mutex);
 	if (op == CEPH_SESSION_CLOSE) {
 		get_session(session);
@@ -2821,6 +3080,7 @@ static void handle_session(struct ceph_mds_session *session,
 		if (session->s_state == CEPH_MDS_SESSION_RECONNECTING)
 			pr_info("mds%d reconnect success\n", session->s_mds);
 		session->s_state = CEPH_MDS_SESSION_OPEN;
+		session->s_features = features;
 		renewed_caps(mdsc, session, 0);
 		wake = 1;
 		if (mdsc->stopping)
@@ -2947,6 +3207,82 @@ static void replay_unsafe_requests(struct ceph_mds_client *mdsc,
 	mutex_unlock(&mdsc->mutex);
 }
 
+static int send_reconnect_partial(struct ceph_reconnect_state *recon_state)
+{
+	struct ceph_msg *reply;
+	struct ceph_pagelist *_pagelist;
+	struct page *page;
+	__le32 *addr;
+	int err = -ENOMEM;
+
+	if (!recon_state->allow_multi)
+		return -ENOSPC;
+
+	/* can't handle message that contains both caps and realm */
+	BUG_ON(!recon_state->nr_caps == !recon_state->nr_realms);
+
+	/* pre-allocate new pagelist */
+	_pagelist = ceph_pagelist_alloc(GFP_NOFS);
+	if (!_pagelist)
+		return -ENOMEM;
+
+	reply = ceph_msg_new2(CEPH_MSG_CLIENT_RECONNECT, 0, 1, GFP_NOFS, false);
+	if (!reply)
+		goto fail_msg;
+
+	/* placeholder for nr_caps */
+	err = ceph_pagelist_encode_32(_pagelist, 0);
+	if (err < 0)
+		goto fail;
+
+	if (recon_state->nr_caps) {
+		/* currently encoding caps */
+		err = ceph_pagelist_encode_32(recon_state->pagelist, 0);
+		if (err)
+			goto fail;
+	} else {
+		/* placeholder for nr_realms (currently encoding relams) */
+		err = ceph_pagelist_encode_32(_pagelist, 0);
+		if (err < 0)
+			goto fail;
+	}
+
+	err = ceph_pagelist_encode_8(recon_state->pagelist, 1);
+	if (err)
+		goto fail;
+
+	page = list_first_entry(&recon_state->pagelist->head, struct page, lru);
+	addr = kmap_atomic(page);
+	if (recon_state->nr_caps) {
+		/* currently encoding caps */
+		*addr = cpu_to_le32(recon_state->nr_caps);
+	} else {
+		/* currently encoding relams */
+		*(addr + 1) = cpu_to_le32(recon_state->nr_realms);
+	}
+	kunmap_atomic(addr);
+
+	reply->hdr.version = cpu_to_le16(5);
+	reply->hdr.compat_version = cpu_to_le16(4);
+
+	reply->hdr.data_len = cpu_to_le32(recon_state->pagelist->length);
+	ceph_msg_data_add_pagelist(reply, recon_state->pagelist);
+
+	ceph_con_send(&recon_state->session->s_con, reply);
+	ceph_pagelist_release(recon_state->pagelist);
+
+	recon_state->pagelist = _pagelist;
+	recon_state->nr_caps = 0;
+	recon_state->nr_realms = 0;
+	recon_state->msg_version = 5;
+	return 0;
+fail:
+	ceph_msg_put(reply);
+fail_msg:
+	ceph_pagelist_release(_pagelist);
+	return err;
+}
+
 /*
  * Encode information about a cap for a reconnect with the MDS.
  */
@@ -2966,9 +3302,6 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
 	dout(" adding %p ino %llx.%llx cap %p %lld %s\n",
 	     inode, ceph_vinop(inode), cap, cap->cap_id,
 	     ceph_cap_string(cap->issued));
-	err = ceph_pagelist_encode_64(pagelist, ceph_ino(inode));
-	if (err)
-		return err;
 
 	spin_lock(&ci->i_ceph_lock);
 	cap->seq = 0;        /* reset cap seq */
@@ -3008,7 +3341,7 @@ static int encode_caps_cb(struct inode *inode, struct ceph_cap *cap,
 	if (recon_state->msg_version >= 2) {
 		int num_fcntl_locks, num_flock_locks;
 		struct ceph_filelock *flocks = NULL;
-		size_t struct_len, total_len = 0;
+		size_t struct_len, total_len = sizeof(u64);
 		u8 struct_v = 0;
 
 encode_again:
@@ -3043,7 +3376,7 @@ encode_again:
 
 		if (recon_state->msg_version >= 3) {
 			/* version, compat_version and struct_len */
-			total_len = 2 * sizeof(u8) + sizeof(u32);
+			total_len += 2 * sizeof(u8) + sizeof(u32);
 			struct_v = 2;
 		}
 		/*
@@ -3060,12 +3393,19 @@ encode_again:
 			struct_len += sizeof(u64); /* snap_follows */
 
 		total_len += struct_len;
-		err = ceph_pagelist_reserve(pagelist, total_len);
-		if (err) {
-			kfree(flocks);
-			goto out_err;
+
+		if (pagelist->length + total_len > RECONNECT_MAX_SIZE) {
+			err = send_reconnect_partial(recon_state);
+			if (err)
+				goto out_freeflocks;
+			pagelist = recon_state->pagelist;
 		}
 
+		err = ceph_pagelist_reserve(pagelist, total_len);
+		if (err)
+			goto out_freeflocks;
+
+		ceph_pagelist_encode_64(pagelist, ceph_ino(inode));
 		if (recon_state->msg_version >= 3) {
 			ceph_pagelist_encode_8(pagelist, struct_v);
 			ceph_pagelist_encode_8(pagelist, 1);
@@ -3077,7 +3417,7 @@ encode_again:
 				       num_fcntl_locks, num_flock_locks);
 		if (struct_v >= 2)
 			ceph_pagelist_encode_64(pagelist, snap_follows);
-
+out_freeflocks:
 		kfree(flocks);
 	} else {
 		u64 pathbase = 0;
@@ -3098,20 +3438,81 @@ encode_again:
 		}
 
 		err = ceph_pagelist_reserve(pagelist,
-				pathlen + sizeof(u32) + sizeof(rec.v1));
+					    sizeof(u64) + sizeof(u32) +
+					    pathlen + sizeof(rec.v1));
 		if (err) {
-			kfree(path);
-			goto out_err;
+			goto out_freepath;
 		}
 
+		ceph_pagelist_encode_64(pagelist, ceph_ino(inode));
 		ceph_pagelist_encode_string(pagelist, path, pathlen);
 		ceph_pagelist_append(pagelist, &rec, sizeof(rec.v1));
-
-		kfree(path);
+out_freepath:
+		ceph_mdsc_free_path(path, pathlen);
 	}
 
-	recon_state->nr_caps++;
 out_err:
+	if (err >= 0)
+		recon_state->nr_caps++;
+	return err;
+}
+
+static int encode_snap_realms(struct ceph_mds_client *mdsc,
+			      struct ceph_reconnect_state *recon_state)
+{
+	struct rb_node *p;
+	struct ceph_pagelist *pagelist = recon_state->pagelist;
+	int err = 0;
+
+	if (recon_state->msg_version >= 4) {
+		err = ceph_pagelist_encode_32(pagelist, mdsc->num_snap_realms);
+		if (err < 0)
+			goto fail;
+	}
+
+	/*
+	 * snaprealms.  we provide mds with the ino, seq (version), and
+	 * parent for all of our realms.  If the mds has any newer info,
+	 * it will tell us.
+	 */
+	for (p = rb_first(&mdsc->snap_realms); p; p = rb_next(p)) {
+		struct ceph_snap_realm *realm =
+		       rb_entry(p, struct ceph_snap_realm, node);
+		struct ceph_mds_snaprealm_reconnect sr_rec;
+
+		if (recon_state->msg_version >= 4) {
+			size_t need = sizeof(u8) * 2 + sizeof(u32) +
+				      sizeof(sr_rec);
+
+			if (pagelist->length + need > RECONNECT_MAX_SIZE) {
+				err = send_reconnect_partial(recon_state);
+				if (err)
+					goto fail;
+				pagelist = recon_state->pagelist;
+			}
+
+			err = ceph_pagelist_reserve(pagelist, need);
+			if (err)
+				goto fail;
+
+			ceph_pagelist_encode_8(pagelist, 1);
+			ceph_pagelist_encode_8(pagelist, 1);
+			ceph_pagelist_encode_32(pagelist, sizeof(sr_rec));
+		}
+
+		dout(" adding snap realm %llx seq %lld parent %llx\n",
+		     realm->ino, realm->seq, realm->parent_ino);
+		sr_rec.ino = cpu_to_le64(realm->ino);
+		sr_rec.seq = cpu_to_le64(realm->seq);
+		sr_rec.parent = cpu_to_le64(realm->parent_ino);
+
+		err = ceph_pagelist_append(pagelist, &sr_rec, sizeof(sr_rec));
+		if (err)
+			goto fail;
+
+		recon_state->nr_realms++;
+	}
+fail:
 	return err;
 }
 
@@ -3132,18 +3533,17 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
 			       struct ceph_mds_session *session)
 {
 	struct ceph_msg *reply;
-	struct rb_node *p;
 	int mds = session->s_mds;
 	int err = -ENOMEM;
-	int s_nr_caps;
-	struct ceph_pagelist *pagelist;
-	struct ceph_reconnect_state recon_state;
+	struct ceph_reconnect_state recon_state = {
+		.session = session,
+	};
 	LIST_HEAD(dispose);
 
 	pr_info("mds%d reconnect start\n", mds);
 
-	pagelist = ceph_pagelist_alloc(GFP_NOFS);
-	if (!pagelist)
+	recon_state.pagelist = ceph_pagelist_alloc(GFP_NOFS);
+	if (!recon_state.pagelist)
 		goto fail_nopagelist;
 
 	reply = ceph_msg_new2(CEPH_MSG_CLIENT_RECONNECT, 0, 1, GFP_NOFS, false);
@@ -3187,63 +3587,90 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
 	/* replay unsafe requests */
 	replay_unsafe_requests(mdsc, session);
 
+	ceph_early_kick_flushing_caps(mdsc, session);
+
 	down_read(&mdsc->snap_rwsem);
 
-	/* traverse this session's caps */
-	s_nr_caps = session->s_nr_caps;
-	err = ceph_pagelist_encode_32(pagelist, s_nr_caps);
+	/* placeholder for nr_caps */
+	err = ceph_pagelist_encode_32(recon_state.pagelist, 0);
 	if (err)
 		goto fail;
 
-	recon_state.nr_caps = 0;
-	recon_state.pagelist = pagelist;
-	if (session->s_con.peer_features & CEPH_FEATURE_MDSENC)
+	if (test_bit(CEPHFS_FEATURE_MULTI_RECONNECT, &session->s_features)) {
 		recon_state.msg_version = 3;
-	else
+		recon_state.allow_multi = true;
+	} else if (session->s_con.peer_features & CEPH_FEATURE_MDSENC) {
+		recon_state.msg_version = 3;
+	} else {
 		recon_state.msg_version = 2;
-	err = iterate_session_caps(session, encode_caps_cb, &recon_state);
-	if (err < 0)
-		goto fail;
+	}
+	/* trsaverse this session's caps */
+	err = ceph_iterate_session_caps(session, encode_caps_cb, &recon_state);
 
 	spin_lock(&session->s_cap_lock);
 	session->s_cap_reconnect = 0;
 	spin_unlock(&session->s_cap_lock);
 
-	/*
-	 * snaprealms.  we provide mds with the ino, seq (version), and
-	 * parent for all of our realms.  If the mds has any newer info,
-	 * it will tell us.
-	 */
-	for (p = rb_first(&mdsc->snap_realms); p; p = rb_next(p)) {
-		struct ceph_snap_realm *realm =
-			rb_entry(p, struct ceph_snap_realm, node);
-		struct ceph_mds_snaprealm_reconnect sr_rec;
+	if (err < 0)
+		goto fail;
 
-		dout(" adding snap realm %llx seq %lld parent %llx\n",
-		     realm->ino, realm->seq, realm->parent_ino);
-		sr_rec.ino = cpu_to_le64(realm->ino);
-		sr_rec.seq = cpu_to_le64(realm->seq);
-		sr_rec.parent = cpu_to_le64(realm->parent_ino);
-		err = ceph_pagelist_append(pagelist, &sr_rec, sizeof(sr_rec));
-		if (err)
-			goto fail;
+	/* check if all realms can be encoded into current message */
+	if (mdsc->num_snap_realms) {
+		size_t total_len =
+			recon_state.pagelist->length +
+			mdsc->num_snap_realms *
+			sizeof(struct ceph_mds_snaprealm_reconnect);
+		if (recon_state.msg_version >= 4) {
+			/* number of realms */
+			total_len += sizeof(u32);
+			/* version, compat_version and struct_len */
+			total_len += mdsc->num_snap_realms *
+				     (2 * sizeof(u8) + sizeof(u32));
+		}
+		if (total_len > RECONNECT_MAX_SIZE) {
+			if (!recon_state.allow_multi) {
+				err = -ENOSPC;
+				goto fail;
+			}
+			if (recon_state.nr_caps) {
+				err = send_reconnect_partial(&recon_state);
+				if (err)
+					goto fail;
+			}
+			recon_state.msg_version = 5;
+		}
 	}
 
-	reply->hdr.version = cpu_to_le16(recon_state.msg_version);
+	err = encode_snap_realms(mdsc, &recon_state);
+	if (err < 0)
+		goto fail;
+
+	if (recon_state.msg_version >= 5) {
+		err = ceph_pagelist_encode_8(recon_state.pagelist, 0);
+		if (err < 0)
+			goto fail;
+	}
 
-	/* raced with cap release? */
-	if (s_nr_caps != recon_state.nr_caps) {
-		struct page *page = list_first_entry(&pagelist->head,
-						     struct page, lru);
+	if (recon_state.nr_caps || recon_state.nr_realms) {
+		struct page *page =
+			list_first_entry(&recon_state.pagelist->head,
+					struct page, lru);
 		__le32 *addr = kmap_atomic(page);
-		*addr = cpu_to_le32(recon_state.nr_caps);
+		if (recon_state.nr_caps) {
+			WARN_ON(recon_state.nr_realms != mdsc->num_snap_realms);
+			*addr = cpu_to_le32(recon_state.nr_caps);
+		} else if (recon_state.msg_version >= 4) {
+			*(addr + 1) = cpu_to_le32(recon_state.nr_realms);
+		}
 		kunmap_atomic(addr);
 	}
 
-	reply->hdr.data_len = cpu_to_le32(pagelist->length);
-	ceph_msg_data_add_pagelist(reply, pagelist);
+	reply->hdr.version = cpu_to_le16(recon_state.msg_version);
+	if (recon_state.msg_version >= 4)
+		reply->hdr.compat_version = cpu_to_le16(4);
 
-	ceph_early_kick_flushing_caps(mdsc, session);
+	reply->hdr.data_len = cpu_to_le32(recon_state.pagelist->length);
+	ceph_msg_data_add_pagelist(reply, recon_state.pagelist);
 
 	ceph_con_send(&session->s_con, reply);
 
@@ -3254,7 +3681,7 @@ static void send_mds_reconnect(struct ceph_mds_client *mdsc,
 	mutex_unlock(&mdsc->mutex);
 
 	up_read(&mdsc->snap_rwsem);
-	ceph_pagelist_release(pagelist);
+	ceph_pagelist_release(recon_state.pagelist);
 	return;
 
 fail:
@@ -3262,7 +3689,7 @@ fail:
 	up_read(&mdsc->snap_rwsem);
 	mutex_unlock(&session->s_mutex);
 fail_nomsg:
-	ceph_pagelist_release(pagelist);
+	ceph_pagelist_release(recon_state.pagelist);
 fail_nopagelist:
 	pr_err("error %d preparing reconnect for mds%d\n", err, mds);
 	return;
@@ -3493,8 +3920,9 @@ release:
 	ceph_con_send(&session->s_con, msg);
 
 out:
-	iput(inode);
 	mutex_unlock(&session->s_mutex);
+	/* avoid calling iput_final() in mds dispatch threads */
+	ceph_async_iput(inode);
 	return;
 
 bad:
@@ -3580,7 +4008,6 @@ static void delayed_work(struct work_struct *work)
 	int renew_caps;
 
 	dout("mdsc delayed_work\n");
-	ceph_check_delayed_caps(mdsc);
 
 	mutex_lock(&mdsc->mutex);
 	renew_interval = mdsc->mdsmap->m_session_timeout >> 2;
@@ -3628,6 +4055,12 @@ static void delayed_work(struct work_struct *work)
 	}
 	mutex_unlock(&mdsc->mutex);
 
+	ceph_check_delayed_caps(mdsc);
+
+	ceph_queue_cap_reclaim_work(mdsc);
+
+	ceph_trim_snapid_map(mdsc);
+
 	schedule_delayed(mdsc);
 }
 
@@ -3656,10 +4089,13 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
 	mdsc->max_sessions = 0;
 	mdsc->stopping = 0;
 	atomic64_set(&mdsc->quotarealms_count, 0);
+	mdsc->quotarealms_inodes = RB_ROOT;
+	mutex_init(&mdsc->quotarealms_inodes_mutex);
 	mdsc->last_snap_seq = 0;
 	init_rwsem(&mdsc->snap_rwsem);
 	mdsc->snap_realms = RB_ROOT;
 	INIT_LIST_HEAD(&mdsc->snap_empty);
+	mdsc->num_snap_realms = 0;
 	spin_lock_init(&mdsc->snap_empty_lock);
 	mdsc->last_tid = 0;
 	mdsc->oldest_tid = 0;
@@ -3677,11 +4113,19 @@ int ceph_mdsc_init(struct ceph_fs_client *fsc)
 	mdsc->num_cap_flushing = 0;
 	spin_lock_init(&mdsc->cap_dirty_lock);
 	init_waitqueue_head(&mdsc->cap_flushing_wq);
-	spin_lock_init(&mdsc->dentry_lru_lock);
-	INIT_LIST_HEAD(&mdsc->dentry_lru);
+	INIT_WORK(&mdsc->cap_reclaim_work, ceph_cap_reclaim_work);
+	atomic_set(&mdsc->cap_reclaim_pending, 0);
+
+	spin_lock_init(&mdsc->dentry_list_lock);
+	INIT_LIST_HEAD(&mdsc->dentry_leases);
+	INIT_LIST_HEAD(&mdsc->dentry_dir_leases);
 
 	ceph_caps_init(mdsc);
-	ceph_adjust_min_caps(mdsc, fsc->min_caps);
+	ceph_adjust_caps_max_min(mdsc, fsc->mount_options);
+
+	spin_lock_init(&mdsc->snapid_map_lock);
+	mdsc->snapid_map_tree = RB_ROOT;
+	INIT_LIST_HEAD(&mdsc->snapid_map_lru);
 
 	init_rwsem(&mdsc->pool_perm_rwsem);
 	mdsc->pool_perm_tree = RB_ROOT;
@@ -3738,6 +4182,8 @@ void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc)
 	 * their inode/dcache refs
 	 */
 	ceph_msgr_flush();
+
+	ceph_cleanup_quotarealms_inodes(mdsc);
 }
 
 /*
@@ -3876,8 +4322,10 @@ void ceph_mdsc_close_sessions(struct ceph_mds_client *mdsc)
 	WARN_ON(!list_empty(&mdsc->cap_delay_list));
 	mutex_unlock(&mdsc->mutex);
 
+	ceph_cleanup_snapid_map(mdsc);
 	ceph_cleanup_empty_realms(mdsc);
 
+	cancel_work_sync(&mdsc->cap_reclaim_work);
 	cancel_delayed_work_sync(&mdsc->delayed_work); /* cancel timer */
 
 	dout("stopped\n");
diff --git a/fs/ceph/mds_client.h b/fs/ceph/mds_client.h
index 729da155ebf0..a83f28bc2387 100644
--- a/fs/ceph/mds_client.h
+++ b/fs/ceph/mds_client.h
@@ -21,11 +21,14 @@
 #define CEPHFS_FEATURE_REPLY_ENCODING	9
 #define CEPHFS_FEATURE_RECLAIM_CLIENT	10
 #define CEPHFS_FEATURE_LAZY_CAP_WANTED	11
+#define CEPHFS_FEATURE_MULTI_RECONNECT  12
 
 #define CEPHFS_FEATURES_CLIENT_SUPPORTED { 	\
 	0, 1, 2, 3, 4, 5, 6, 7,			\
 	CEPHFS_FEATURE_MIMIC,			\
+	CEPHFS_FEATURE_REPLY_ENCODING,		\
 	CEPHFS_FEATURE_LAZY_CAP_WANTED,		\
+	CEPHFS_FEATURE_MULTI_RECONNECT,		\
 }
 #define CEPHFS_FEATURES_CLIENT_REQUIRED {}
 
@@ -65,6 +68,7 @@ struct ceph_mds_reply_info_in {
 	char *pool_ns_data;
 	u64 max_bytes;
 	u64 max_files;
+	s32 dir_pin;
 };
 
 struct ceph_mds_reply_dir_entry {
@@ -152,6 +156,7 @@ struct ceph_mds_session {
 	int               s_mds;
 	int               s_state;
 	unsigned long     s_ttl;      /* time until mds kills us */
+	unsigned long	  s_features;
 	u64               s_seq;      /* incoming msg seq # */
 	struct mutex      s_mutex;    /* serialize session messages */
 
@@ -167,19 +172,20 @@ struct ceph_mds_session {
 	/* protected by s_cap_lock */
 	spinlock_t        s_cap_lock;
 	struct list_head  s_caps;     /* all caps issued by this session */
+	struct ceph_cap  *s_cap_iterator;
 	int               s_nr_caps, s_trim_caps;
 	int               s_num_cap_releases;
 	int		  s_cap_reconnect;
 	int		  s_readonly;
 	struct list_head  s_cap_releases; /* waiting cap_release messages */
-	struct ceph_cap  *s_cap_iterator;
+	struct work_struct s_cap_release_work;
 
 	/* protected by mutex */
 	struct list_head  s_cap_flushing;     /* inodes w/ flushing caps */
 	unsigned long     s_renew_requested; /* last time we sent a renew req */
 	u64               s_renew_seq;
 
-	refcount_t          s_ref;
+	refcount_t        s_ref;
 	struct list_head  s_waiting;  /* waiting requests */
 	struct list_head  s_unsafe;   /* unsafe requests */
 };
@@ -310,6 +316,27 @@ struct ceph_pool_perm {
 	char pool_ns[];
 };
 
+struct ceph_snapid_map {
+	struct rb_node node;
+	struct list_head lru;
+	atomic_t ref;
+	u64 snap;
+	dev_t dev;
+	unsigned long last_used;
+};
+
+/*
+ * node for list of quotarealm inodes that are not visible from the filesystem
+ * mountpoint, but required to handle, e.g. quotas.
+ */
+struct ceph_quotarealm_inode {
+	struct rb_node node;
+	u64 ino;
+	unsigned long timeout; /* last time a lookup failed for this inode */
+	struct mutex mutex;
+	struct inode *inode;
+};
+
 /*
  * mds client state
  */
@@ -329,6 +356,12 @@ struct ceph_mds_client {
 	int                     stopping;      /* true if shutting down */
 
 	atomic64_t		quotarealms_count; /* # realms with quota */
+	/*
+	 * We keep a list of inodes we don't see in the mountpoint but that we
+	 * need to track quota realms.
+	 */
+	struct rb_root		quotarealms_inodes;
+	struct mutex		quotarealms_inodes_mutex;
 
 	/*
 	 * snap_rwsem will cover cap linkage into snaprealms, and
@@ -341,6 +374,7 @@ struct ceph_mds_client {
 	struct rw_semaphore     snap_rwsem;
 	struct rb_root          snap_realms;
 	struct list_head        snap_empty;
+	int			num_snap_realms;
 	spinlock_t              snap_empty_lock;  /* protect snap_empty */
 
 	u64                    last_tid;      /* most recent mds request */
@@ -362,6 +396,9 @@ struct ceph_mds_client {
 	spinlock_t        cap_dirty_lock;   /* protects above items */
 	wait_queue_head_t cap_flushing_wq;
 
+	struct work_struct cap_reclaim_work;
+	atomic_t	   cap_reclaim_pending;
+
 	/*
 	 * Cap reservations
 	 *
@@ -378,13 +415,18 @@ struct ceph_mds_client {
 						unreserved) */
 	int		caps_total_count;    /* total caps allocated */
 	int		caps_use_count;      /* in use */
+	int		caps_use_max;	     /* max used caps */
 	int		caps_reserve_count;  /* unused, reserved */
 	int		caps_avail_count;    /* unused, unreserved */
 	int		caps_min_count;      /* keep at least this many
 						(unreserved) */
-	spinlock_t	  dentry_lru_lock;
-	struct list_head  dentry_lru;
-	int		  num_dentry;
+	spinlock_t	  dentry_list_lock;
+	struct list_head  dentry_leases;     /* fifo list */
+	struct list_head  dentry_dir_leases; /* lru list */
+
+	spinlock_t		snapid_map_lock;
+	struct rb_root		snapid_map_tree;
+	struct list_head	snapid_map_lru;
 
 	struct rw_semaphore     pool_perm_rwsem;
 	struct rb_root		pool_perm_tree;
@@ -423,8 +465,9 @@ extern int ceph_alloc_readdir_reply_buffer(struct ceph_mds_request *req,
 					   struct inode *dir);
 extern struct ceph_mds_request *
 ceph_mdsc_create_request(struct ceph_mds_client *mdsc, int op, int mode);
-extern void ceph_mdsc_submit_request(struct ceph_mds_client *mdsc,
-				     struct ceph_mds_request *req);
+extern int ceph_mdsc_submit_request(struct ceph_mds_client *mdsc,
+				    struct inode *dir,
+				    struct ceph_mds_request *req);
 extern int ceph_mdsc_do_request(struct ceph_mds_client *mdsc,
 				struct inode *dir,
 				struct ceph_mds_request *req);
@@ -438,11 +481,24 @@ static inline void ceph_mdsc_put_request(struct ceph_mds_request *req)
 	kref_put(&req->r_kref, ceph_mdsc_release_request);
 }
 
-extern void ceph_send_cap_releases(struct ceph_mds_client *mdsc,
-				   struct ceph_mds_session *session);
-
+extern void __ceph_queue_cap_release(struct ceph_mds_session *session,
+				    struct ceph_cap *cap);
+extern void ceph_flush_cap_releases(struct ceph_mds_client *mdsc,
+				    struct ceph_mds_session *session);
+extern void ceph_queue_cap_reclaim_work(struct ceph_mds_client *mdsc);
+extern void ceph_reclaim_caps_nr(struct ceph_mds_client *mdsc, int nr);
+extern int ceph_iterate_session_caps(struct ceph_mds_session *session,
+				     int (*cb)(struct inode *,
+					       struct ceph_cap *, void *),
+				     void *arg);
 extern void ceph_mdsc_pre_umount(struct ceph_mds_client *mdsc);
 
+static inline void ceph_mdsc_free_path(char *path, int len)
+{
+	if (path)
+		__putname(path - (PATH_MAX - 1 - len));
+}
+
 extern char *ceph_mdsc_build_path(struct dentry *dentry, int *plen, u64 *base,
 				  int stop_on_nosnap);
 
diff --git a/fs/ceph/mdsmap.c b/fs/ceph/mdsmap.c
index 1a2c5d390f7f..701b4fb0fb5a 100644
--- a/fs/ceph/mdsmap.c
+++ b/fs/ceph/mdsmap.c
@@ -205,7 +205,7 @@ struct ceph_mdsmap *ceph_mdsmap_decode(void **p, void *end)
 
 		dout("mdsmap_decode %d/%d %lld mds%d.%d %s %s\n",
 		     i+1, n, global_id, mds, inc,
-		     ceph_pr_addr(&addr.in_addr),
+		     ceph_pr_addr(&addr),
 		     ceph_mds_state_name(state));
 
 		if (mds < 0 || state <= 0)
diff --git a/fs/ceph/quota.c b/fs/ceph/quota.c
index 9455d3aef0c3..d629fc857450 100644
--- a/fs/ceph/quota.c
+++ b/fs/ceph/quota.c
@@ -22,7 +22,16 @@ void ceph_adjust_quota_realms_count(struct inode *inode, bool inc)
 static inline bool ceph_has_realms_with_quotas(struct inode *inode)
 {
 	struct ceph_mds_client *mdsc = ceph_inode_to_client(inode)->mdsc;
-	return atomic64_read(&mdsc->quotarealms_count) > 0;
+	struct super_block *sb = mdsc->fsc->sb;
+
+	if (atomic64_read(&mdsc->quotarealms_count) > 0)
+		return true;
+	/* if root is the real CephFS root, we don't have quota realms */
+	if (sb->s_root->d_inode &&
+	    (sb->s_root->d_inode->i_ino == CEPH_INO_ROOT))
+		return false;
+	/* otherwise, we can't know for sure */
+	return true;
 }
 
 void ceph_handle_quota(struct ceph_mds_client *mdsc,
@@ -65,7 +74,110 @@ void ceph_handle_quota(struct ceph_mds_client *mdsc,
 		            le64_to_cpu(h->max_files));
 	spin_unlock(&ci->i_ceph_lock);
 
-	iput(inode);
+	/* avoid calling iput_final() in dispatch thread */
+	ceph_async_iput(inode);
+}
+
+static struct ceph_quotarealm_inode *
+find_quotarealm_inode(struct ceph_mds_client *mdsc, u64 ino)
+{
+	struct ceph_quotarealm_inode *qri = NULL;
+	struct rb_node **node, *parent = NULL;
+
+	mutex_lock(&mdsc->quotarealms_inodes_mutex);
+	node = &(mdsc->quotarealms_inodes.rb_node);
+	while (*node) {
+		parent = *node;
+		qri = container_of(*node, struct ceph_quotarealm_inode, node);
+
+		if (ino < qri->ino)
+			node = &((*node)->rb_left);
+		else if (ino > qri->ino)
+			node = &((*node)->rb_right);
+		else
+			break;
+	}
+	if (!qri || (qri->ino != ino)) {
+		/* Not found, create a new one and insert it */
+		qri = kmalloc(sizeof(*qri), GFP_KERNEL);
+		if (qri) {
+			qri->ino = ino;
+			qri->inode = NULL;
+			qri->timeout = 0;
+			mutex_init(&qri->mutex);
+			rb_link_node(&qri->node, parent, node);
+			rb_insert_color(&qri->node, &mdsc->quotarealms_inodes);
+		} else
+			pr_warn("Failed to alloc quotarealms_inode\n");
+	}
+	mutex_unlock(&mdsc->quotarealms_inodes_mutex);
+
+	return qri;
+}
+
+/*
+ * This function will try to lookup a realm inode which isn't visible in the
+ * filesystem mountpoint.  A list of these kind of inodes (not visible) is
+ * maintained in the mdsc and freed only when the filesystem is umounted.
+ *
+ * Note that these inodes are kept in this list even if the lookup fails, which
+ * allows to prevent useless lookup requests.
+ */
+static struct inode *lookup_quotarealm_inode(struct ceph_mds_client *mdsc,
+					     struct super_block *sb,
+					     struct ceph_snap_realm *realm)
+{
+	struct ceph_quotarealm_inode *qri;
+	struct inode *in;
+
+	qri = find_quotarealm_inode(mdsc, realm->ino);
+	if (!qri)
+		return NULL;
+
+	mutex_lock(&qri->mutex);
+	if (qri->inode) {
+		/* A request has already returned the inode */
+		mutex_unlock(&qri->mutex);
+		return qri->inode;
+	}
+	/* Check if this inode lookup has failed recently */
+	if (qri->timeout &&
+	    time_before_eq(jiffies, qri->timeout)) {
+		mutex_unlock(&qri->mutex);
+		return NULL;
+	}
+	in = ceph_lookup_inode(sb, realm->ino);
+	if (IS_ERR(in)) {
+		pr_warn("Can't lookup inode %llx (err: %ld)\n",
+			realm->ino, PTR_ERR(in));
+		qri->timeout = jiffies + msecs_to_jiffies(60 * 1000); /* XXX */
+	} else {
+		qri->timeout = 0;
+		qri->inode = in;
+	}
+	mutex_unlock(&qri->mutex);
+
+	return in;
+}
+
+void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc)
+{
+	struct ceph_quotarealm_inode *qri;
+	struct rb_node *node;
+
+	/*
+	 * It should now be safe to clean quotarealms_inode tree without holding
+	 * mdsc->quotarealms_inodes_mutex...
+	 */
+	mutex_lock(&mdsc->quotarealms_inodes_mutex);
+	while (!RB_EMPTY_ROOT(&mdsc->quotarealms_inodes)) {
+		node = rb_first(&mdsc->quotarealms_inodes);
+		qri = rb_entry(node, struct ceph_quotarealm_inode, node);
+		rb_erase(node, &mdsc->quotarealms_inodes);
+		iput(qri->inode);
+		kfree(qri);
+	}
+	mutex_unlock(&mdsc->quotarealms_inodes_mutex);
 }
 
 /*
@@ -76,9 +188,15 @@ void ceph_handle_quota(struct ceph_mds_client *mdsc,
  *
  * Note that the caller is responsible for calling ceph_put_snap_realm() on the
  * returned realm.
+ *
+ * Callers of this function need to hold mdsc->snap_rwsem.  However, if there's
+ * a need to do an inode lookup, this rwsem will be temporarily dropped.  Hence
+ * the 'retry' argument: if rwsem needs to be dropped and 'retry' is 'false'
+ * this function will return -EAGAIN; otherwise, the snaprealms walk-through
+ * will be restarted.
  */
 static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc,
-					       struct inode *inode)
+					       struct inode *inode, bool retry)
 {
 	struct ceph_inode_info *ci = NULL;
 	struct ceph_snap_realm *realm, *next;
@@ -88,6 +206,7 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc,
 	if (ceph_snap(inode) != CEPH_NOSNAP)
 		return NULL;
 
+restart:
 	realm = ceph_inode(inode)->i_snap_realm;
 	if (realm)
 		ceph_get_snap_realm(mdsc, realm);
@@ -95,15 +214,30 @@ static struct ceph_snap_realm *get_quota_realm(struct ceph_mds_client *mdsc,
 		pr_err_ratelimited("get_quota_realm: ino (%llx.%llx) "
 				   "null i_snap_realm\n", ceph_vinop(inode));
 	while (realm) {
+		bool has_inode;
+
 		spin_lock(&realm->inodes_with_caps_lock);
-		in = realm->inode ? igrab(realm->inode) : NULL;
+		has_inode = realm->inode;
+		in = has_inode ? igrab(realm->inode) : NULL;
 		spin_unlock(&realm->inodes_with_caps_lock);
-		if (!in)
+		if (has_inode && !in)
 			break;
+		if (!in) {
+			up_read(&mdsc->snap_rwsem);
+			in = lookup_quotarealm_inode(mdsc, inode->i_sb, realm);
+			down_read(&mdsc->snap_rwsem);
+			if (IS_ERR_OR_NULL(in))
+				break;
+			ceph_put_snap_realm(mdsc, realm);
+			if (!retry)
+				return ERR_PTR(-EAGAIN);
+			goto restart;
+		}
 
 		ci = ceph_inode(in);
 		has_quota = __ceph_has_any_quota(ci);
-		iput(in);
+		/* avoid calling iput_final() while holding mdsc->snap_rwsem */
+		ceph_async_iput(in);
 
 		next = realm->parent;
 		if (has_quota || !next)
@@ -125,9 +259,22 @@ bool ceph_quota_is_same_realm(struct inode *old, struct inode *new)
 	struct ceph_snap_realm *old_realm, *new_realm;
 	bool is_same;
 
+restart:
+	/*
+	 * We need to lookup 2 quota realms atomically, i.e. with snap_rwsem.
+	 * However, get_quota_realm may drop it temporarily.  By setting the
+	 * 'retry' parameter to 'false', we'll get -EAGAIN if the rwsem was
+	 * dropped and we can then restart the whole operation.
+	 */
 	down_read(&mdsc->snap_rwsem);
-	old_realm = get_quota_realm(mdsc, old);
-	new_realm = get_quota_realm(mdsc, new);
+	old_realm = get_quota_realm(mdsc, old, true);
+	new_realm = get_quota_realm(mdsc, new, false);
+	if (PTR_ERR(new_realm) == -EAGAIN) {
+		up_read(&mdsc->snap_rwsem);
+		if (old_realm)
+			ceph_put_snap_realm(mdsc, old_realm);
+		goto restart;
+	}
 	is_same = (old_realm == new_realm);
 	up_read(&mdsc->snap_rwsem);
 
@@ -166,6 +313,7 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op,
 		return false;
 
 	down_read(&mdsc->snap_rwsem);
+restart:
 	realm = ceph_inode(inode)->i_snap_realm;
 	if (realm)
 		ceph_get_snap_realm(mdsc, realm);
@@ -173,12 +321,23 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op,
 		pr_err_ratelimited("check_quota_exceeded: ino (%llx.%llx) "
 				   "null i_snap_realm\n", ceph_vinop(inode));
 	while (realm) {
+		bool has_inode;
+
 		spin_lock(&realm->inodes_with_caps_lock);
-		in = realm->inode ? igrab(realm->inode) : NULL;
+		has_inode = realm->inode;
+		in = has_inode ? igrab(realm->inode) : NULL;
 		spin_unlock(&realm->inodes_with_caps_lock);
-		if (!in)
+		if (has_inode && !in)
 			break;
-
+		if (!in) {
+			up_read(&mdsc->snap_rwsem);
+			in = lookup_quotarealm_inode(mdsc, inode->i_sb, realm);
+			down_read(&mdsc->snap_rwsem);
+			if (IS_ERR_OR_NULL(in))
+				break;
+			ceph_put_snap_realm(mdsc, realm);
+			goto restart;
+		}
 		ci = ceph_inode(in);
 		spin_lock(&ci->i_ceph_lock);
 		if (op == QUOTA_CHECK_MAX_FILES_OP) {
@@ -215,7 +374,8 @@ static bool check_quota_exceeded(struct inode *inode, enum quota_check_op op,
 			pr_warn("Invalid quota check op (%d)\n", op);
 			exceeded = true; /* Just break the loop */
 		}
-		iput(in);
+		/* avoid calling iput_final() while holding mdsc->snap_rwsem */
+		ceph_async_iput(in);
 
 		next = realm->parent;
 		if (exceeded || !next)
@@ -314,7 +474,7 @@ bool ceph_quota_update_statfs(struct ceph_fs_client *fsc, struct kstatfs *buf)
 	bool is_updated = false;
 
 	down_read(&mdsc->snap_rwsem);
-	realm = get_quota_realm(mdsc, d_inode(fsc->sb->s_root));
+	realm = get_quota_realm(mdsc, d_inode(fsc->sb->s_root), true);
 	up_read(&mdsc->snap_rwsem);
 	if (!realm)
 		return false;
diff --git a/fs/ceph/snap.c b/fs/ceph/snap.c
index 041c27ea8de1..72c6c022f02b 100644
--- a/fs/ceph/snap.c
+++ b/fs/ceph/snap.c
@@ -3,12 +3,13 @@
 
 #include <linux/sort.h>
 #include <linux/slab.h>
-
 #include "super.h"
 #include "mds_client.h"
-
 #include <linux/ceph/decode.h>
 
+/* unused map expires after 5 minutes */
+#define CEPH_SNAPID_MAP_TIMEOUT	(5 * 60 * HZ)
+
 /*
  * Snapshots in ceph are driven in large part by cooperation from the
  * client.  In contrast to local file systems or file servers that
@@ -124,6 +125,8 @@ static struct ceph_snap_realm *ceph_create_snap_realm(
 	INIT_LIST_HEAD(&realm->inodes_with_caps);
 	spin_lock_init(&realm->inodes_with_caps_lock);
 	__insert_snap_realm(&mdsc->snap_realms, realm);
+	mdsc->num_snap_realms++;
+
 	dout("create_snap_realm %llx %p\n", realm->ino, realm);
 	return realm;
 }
@@ -175,6 +178,7 @@ static void __destroy_snap_realm(struct ceph_mds_client *mdsc,
 	dout("__destroy_snap_realm %p %llx\n", realm, realm->ino);
 
 	rb_erase(&realm->node, &mdsc->snap_realms);
+	mdsc->num_snap_realms--;
 
 	if (realm->parent) {
 		list_del_init(&realm->child_item);
@@ -568,7 +572,12 @@ void ceph_queue_cap_snap(struct ceph_inode_info *ci)
 	old_snapc = NULL;
 
 update_snapc:
-	if (ci->i_head_snapc) {
+       if (ci->i_wrbuffer_ref_head == 0 &&
+           ci->i_wr_ref == 0 &&
+           ci->i_dirty_caps == 0 &&
+           ci->i_flushing_caps == 0) {
+               ci->i_head_snapc = NULL;
+       } else {
 		ci->i_head_snapc = ceph_get_snap_context(new_snapc);
 		dout(" new snapc is %p\n", new_snapc);
 	}
@@ -616,7 +625,8 @@ int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
 	     capsnap->size);
 
 	spin_lock(&mdsc->snap_flush_lock);
-	list_add_tail(&ci->i_snap_flush_item, &mdsc->snap_flush_list);
+	if (list_empty(&ci->i_snap_flush_item))
+		list_add_tail(&ci->i_snap_flush_item, &mdsc->snap_flush_list);
 	spin_unlock(&mdsc->snap_flush_lock);
 	return 1;  /* caller may want to ceph_flush_snaps */
 }
@@ -638,13 +648,15 @@ static void queue_realm_cap_snaps(struct ceph_snap_realm *realm)
 		if (!inode)
 			continue;
 		spin_unlock(&realm->inodes_with_caps_lock);
-		iput(lastinode);
+		/* avoid calling iput_final() while holding
+		 * mdsc->snap_rwsem or in mds dispatch threads */
+		ceph_async_iput(lastinode);
 		lastinode = inode;
 		ceph_queue_cap_snap(ci);
 		spin_lock(&realm->inodes_with_caps_lock);
 	}
 	spin_unlock(&realm->inodes_with_caps_lock);
-	iput(lastinode);
+	ceph_async_iput(lastinode);
 
 	dout("queue_realm_cap_snaps %p %llx done\n", realm, realm->ino);
 }
@@ -796,7 +808,9 @@ static void flush_snaps(struct ceph_mds_client *mdsc)
 		ihold(inode);
 		spin_unlock(&mdsc->snap_flush_lock);
 		ceph_flush_snaps(ci, &session);
-		iput(inode);
+		/* avoid calling iput_final() while holding
+		 * session->s_mutex or in mds dispatch threads */
+		ceph_async_iput(inode);
 		spin_lock(&mdsc->snap_flush_lock);
 	}
 	spin_unlock(&mdsc->snap_flush_lock);
@@ -940,12 +954,14 @@ void ceph_handle_snap(struct ceph_mds_client *mdsc,
 			ceph_get_snap_realm(mdsc, realm);
 			ceph_put_snap_realm(mdsc, oldrealm);
 
-			iput(inode);
+			/* avoid calling iput_final() while holding
+			 * mdsc->snap_rwsem or mds in dispatch threads */
+			ceph_async_iput(inode);
 			continue;
 
 skip_inode:
 			spin_unlock(&ci->i_ceph_lock);
-			iput(inode);
+			ceph_async_iput(inode);
 		}
 
 		/* we may have taken some of the old realm's children. */
@@ -985,3 +1001,154 @@ out:
 		up_write(&mdsc->snap_rwsem);
 	return;
 }
+
+struct ceph_snapid_map* ceph_get_snapid_map(struct ceph_mds_client *mdsc,
+					    u64 snap)
+{
+	struct ceph_snapid_map *sm, *exist;
+	struct rb_node **p, *parent;
+	int ret;
+
+	exist = NULL;
+	spin_lock(&mdsc->snapid_map_lock);
+	p = &mdsc->snapid_map_tree.rb_node;
+	while (*p) {
+		exist = rb_entry(*p, struct ceph_snapid_map, node);
+		if (snap > exist->snap) {
+			p = &(*p)->rb_left;
+		} else if (snap < exist->snap) {
+			p = &(*p)->rb_right;
+		} else {
+			if (atomic_inc_return(&exist->ref) == 1)
+				list_del_init(&exist->lru);
+			break;
+		}
+		exist = NULL;
+	}
+	spin_unlock(&mdsc->snapid_map_lock);
+	if (exist) {
+		dout("found snapid map %llx -> %x\n", exist->snap, exist->dev);
+		return exist;
+	}
+
+	sm = kmalloc(sizeof(*sm), GFP_NOFS);
+	if (!sm)
+		return NULL;
+
+	ret = get_anon_bdev(&sm->dev);
+	if (ret < 0) {
+		kfree(sm);
+		return NULL;
+	}
+
+	INIT_LIST_HEAD(&sm->lru);
+	atomic_set(&sm->ref, 1);
+	sm->snap = snap;
+
+	exist = NULL;
+	parent = NULL;
+	p = &mdsc->snapid_map_tree.rb_node;
+	spin_lock(&mdsc->snapid_map_lock);
+	while (*p) {
+		parent = *p;
+		exist = rb_entry(*p, struct ceph_snapid_map, node);
+		if (snap > exist->snap)
+			p = &(*p)->rb_left;
+		else if (snap < exist->snap)
+			p = &(*p)->rb_right;
+		else
+			break;
+		exist = NULL;
+	}
+	if (exist) {
+		if (atomic_inc_return(&exist->ref) == 1)
+			list_del_init(&exist->lru);
+	} else {
+		rb_link_node(&sm->node, parent, p);
+		rb_insert_color(&sm->node, &mdsc->snapid_map_tree);
+	}
+	spin_unlock(&mdsc->snapid_map_lock);
+	if (exist) {
+		free_anon_bdev(sm->dev);
+		kfree(sm);
+		dout("found snapid map %llx -> %x\n", exist->snap, exist->dev);
+		return exist;
+	}
+
+	dout("create snapid map %llx -> %x\n", sm->snap, sm->dev);
+	return sm;
+}
+
+void ceph_put_snapid_map(struct ceph_mds_client* mdsc,
+			 struct ceph_snapid_map *sm)
+{
+	if (!sm)
+		return;
+	if (atomic_dec_and_lock(&sm->ref, &mdsc->snapid_map_lock)) {
+		if (!RB_EMPTY_NODE(&sm->node)) {
+			sm->last_used = jiffies;
+			list_add_tail(&sm->lru, &mdsc->snapid_map_lru);
+			spin_unlock(&mdsc->snapid_map_lock);
+		} else {
+			/* already cleaned up by
+			 * ceph_cleanup_snapid_map() */
+			spin_unlock(&mdsc->snapid_map_lock);
+			kfree(sm);
+		}
+	}
+}
+
+void ceph_trim_snapid_map(struct ceph_mds_client *mdsc)
+{
+	struct ceph_snapid_map *sm;
+	unsigned long now;
+	LIST_HEAD(to_free);
+
+	spin_lock(&mdsc->snapid_map_lock);
+	now = jiffies;
+
+	while (!list_empty(&mdsc->snapid_map_lru)) {
+		sm = list_first_entry(&mdsc->snapid_map_lru,
+				      struct ceph_snapid_map, lru);
+		if (time_after(sm->last_used + CEPH_SNAPID_MAP_TIMEOUT, now))
+			break;
+
+		rb_erase(&sm->node, &mdsc->snapid_map_tree);
+		list_move(&sm->lru, &to_free);
+	}
+	spin_unlock(&mdsc->snapid_map_lock);
+
+	while (!list_empty(&to_free)) {
+		sm = list_first_entry(&to_free, struct ceph_snapid_map, lru);
+		list_del(&sm->lru);
+		dout("trim snapid map %llx -> %x\n", sm->snap, sm->dev);
+		free_anon_bdev(sm->dev);
+		kfree(sm);
+	}
+}
+
+void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc)
+{
+	struct ceph_snapid_map *sm;
+	struct rb_node *p;
+	LIST_HEAD(to_free);
+
+	spin_lock(&mdsc->snapid_map_lock);
+	while ((p = rb_first(&mdsc->snapid_map_tree))) {
+		sm = rb_entry(p, struct ceph_snapid_map, node);
+		rb_erase(p, &mdsc->snapid_map_tree);
+		RB_CLEAR_NODE(p);
+		list_move(&sm->lru, &to_free);
+	}
+	spin_unlock(&mdsc->snapid_map_lock);
+
+	while (!list_empty(&to_free)) {
+		sm = list_first_entry(&to_free, struct ceph_snapid_map, lru);
+		list_del(&sm->lru);
+		free_anon_bdev(sm->dev);
+		if (WARN_ON_ONCE(atomic_read(&sm->ref))) {
+			pr_err("snapid map %llx -> %x still in use\n",
+			       sm->snap, sm->dev);
+		}
+	}
+}
diff --git a/fs/ceph/super.c b/fs/ceph/super.c
index da2cd8e89062..ed1b65a6c2c3 100644
--- a/fs/ceph/super.c
+++ b/fs/ceph/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 
 #include <linux/ceph/ceph_debug.h>
 
@@ -133,6 +134,7 @@ enum {
 	Opt_rasize,
 	Opt_caps_wanted_delay_min,
 	Opt_caps_wanted_delay_max,
+	Opt_caps_max,
 	Opt_readdir_max_entries,
 	Opt_readdir_max_bytes,
 	Opt_congestion_kb,
@@ -175,6 +177,7 @@ static match_table_t fsopt_tokens = {
 	{Opt_rasize, "rasize=%d"},
 	{Opt_caps_wanted_delay_min, "caps_wanted_delay_min=%d"},
 	{Opt_caps_wanted_delay_max, "caps_wanted_delay_max=%d"},
+	{Opt_caps_max, "caps_max=%d"},
 	{Opt_readdir_max_entries, "readdir_max_entries=%d"},
 	{Opt_readdir_max_bytes, "readdir_max_bytes=%d"},
 	{Opt_congestion_kb, "write_congestion_kb=%d"},
@@ -286,6 +289,11 @@ static int parse_fsopt_token(char *c, void *private)
 			return -EINVAL;
 		fsopt->caps_wanted_delay_max = intval;
 		break;
+	case Opt_caps_max:
+		if (intval < 0)
+			return -EINVAL;
+		fsopt->caps_max = intval;
+		break;
 	case Opt_readdir_max_entries:
 		if (intval < 1)
 			return -EINVAL;
@@ -576,6 +584,8 @@ static int ceph_show_options(struct seq_file *m, struct dentry *root)
 		seq_printf(m, ",rasize=%d", fsopt->rasize);
 	if (fsopt->congestion_kb != default_congestion_kb())
 		seq_printf(m, ",write_congestion_kb=%d", fsopt->congestion_kb);
+	if (fsopt->caps_max)
+		seq_printf(m, ",caps_max=%d", fsopt->caps_max);
 	if (fsopt->caps_wanted_delay_min != CEPH_CAPS_WANTED_DELAY_MIN_DEFAULT)
 		seq_printf(m, ",caps_wanted_delay_min=%d",
 			 fsopt->caps_wanted_delay_min);
@@ -662,15 +672,12 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
 	 * The number of concurrent works can be high but they don't need
 	 * to be processed in parallel, limit concurrency.
 	 */
-	fsc->wb_wq = alloc_workqueue("ceph-writeback", 0, 1);
-	if (!fsc->wb_wq)
+	fsc->inode_wq = alloc_workqueue("ceph-inode", WQ_UNBOUND, 0);
+	if (!fsc->inode_wq)
 		goto fail_client;
-	fsc->pg_inv_wq = alloc_workqueue("ceph-pg-invalid", 0, 1);
-	if (!fsc->pg_inv_wq)
-		goto fail_wb_wq;
-	fsc->trunc_wq = alloc_workqueue("ceph-trunc", 0, 1);
-	if (!fsc->trunc_wq)
-		goto fail_pg_inv_wq;
+	fsc->cap_wq = alloc_workqueue("ceph-cap", 0, 1);
+	if (!fsc->cap_wq)
+		goto fail_inode_wq;
 
 	/* set up mempools */
 	err = -ENOMEM;
@@ -678,19 +685,14 @@ static struct ceph_fs_client *create_fs_client(struct ceph_mount_options *fsopt,
 	size = sizeof (struct page *) * (page_count ? page_count : 1);
 	fsc->wb_pagevec_pool = mempool_create_kmalloc_pool(10, size);
 	if (!fsc->wb_pagevec_pool)
-		goto fail_trunc_wq;
-
-	/* caps */
-	fsc->min_caps = fsopt->max_readdir;
+		goto fail_cap_wq;
 
 	return fsc;
 
-fail_trunc_wq:
-	destroy_workqueue(fsc->trunc_wq);
-fail_pg_inv_wq:
-	destroy_workqueue(fsc->pg_inv_wq);
-fail_wb_wq:
-	destroy_workqueue(fsc->wb_wq);
+fail_cap_wq:
+	destroy_workqueue(fsc->cap_wq);
+fail_inode_wq:
+	destroy_workqueue(fsc->inode_wq);
 fail_client:
 	ceph_destroy_client(fsc->client);
 fail:
@@ -703,18 +705,16 @@ fail:
 
 static void flush_fs_workqueues(struct ceph_fs_client *fsc)
 {
-	flush_workqueue(fsc->wb_wq);
-	flush_workqueue(fsc->pg_inv_wq);
-	flush_workqueue(fsc->trunc_wq);
+	flush_workqueue(fsc->inode_wq);
+	flush_workqueue(fsc->cap_wq);
 }
 
 static void destroy_fs_client(struct ceph_fs_client *fsc)
 {
 	dout("destroy_fs_client %p\n", fsc);
 
-	destroy_workqueue(fsc->wb_wq);
-	destroy_workqueue(fsc->pg_inv_wq);
-	destroy_workqueue(fsc->trunc_wq);
+	destroy_workqueue(fsc->inode_wq);
+	destroy_workqueue(fsc->cap_wq);
 
 	mempool_destroy(fsc->wb_pagevec_pool);
 
@@ -832,13 +832,21 @@ static void ceph_umount_begin(struct super_block *sb)
 	return;
 }
 
+static int ceph_remount(struct super_block *sb, int *flags, char *data)
+{
+	sync_filesystem(sb);
+	return 0;
+}
+
 static const struct super_operations ceph_super_ops = {
 	.alloc_inode	= ceph_alloc_inode,
 	.destroy_inode	= ceph_destroy_inode,
+	.free_inode	= ceph_free_inode,
 	.write_inode    = ceph_write_inode,
 	.drop_inode	= ceph_drop_inode,
 	.sync_fs        = ceph_sync_fs,
 	.put_super	= ceph_put_super,
+	.remount_fs	= ceph_remount,
 	.show_options   = ceph_show_options,
 	.statfs		= ceph_statfs,
 	.umount_begin   = ceph_umount_begin,
@@ -929,9 +937,7 @@ static struct dentry *ceph_real_mount(struct ceph_fs_client *fsc)
 			dout("mount opening path %s\n", path);
 		}
 
-		err = ceph_fs_debugfs_init(fsc);
-		if (err < 0)
-			goto out;
+		ceph_fs_debugfs_init(fsc);
 
 		root = open_root_dentry(fsc, path, started);
 		if (IS_ERR(root)) {
diff --git a/fs/ceph/super.h b/fs/ceph/super.h
index dfb64a5211b6..fbe6869a3f95 100644
--- a/fs/ceph/super.h
+++ b/fs/ceph/super.h
@@ -79,6 +79,7 @@ struct ceph_mount_options {
 	int rasize;           /* max readahead */
 	int congestion_kb;    /* max writeback in flight */
 	int caps_wanted_delay_min, caps_wanted_delay_max;
+	int caps_max;
 	int max_readdir;       /* max readdir result (entires) */
 	int max_readdir_bytes; /* max readdir result (bytes) */
 
@@ -100,18 +101,17 @@ struct ceph_fs_client {
 	struct ceph_client *client;
 
 	unsigned long mount_state;
-	int min_caps;                  /* min caps i added */
 	loff_t max_file_size;
 
 	struct ceph_mds_client *mdsc;
 
 	/* writeback */
 	mempool_t *wb_pagevec_pool;
-	struct workqueue_struct *wb_wq;
-	struct workqueue_struct *pg_inv_wq;
-	struct workqueue_struct *trunc_wq;
 	atomic_long_t writeback_count;
 
+	struct workqueue_struct *inode_wq;
+	struct workqueue_struct *cap_wq;
+
 #ifdef CONFIG_DEBUG_FS
 	struct dentry *debugfs_dentry_lru, *debugfs_caps;
 	struct dentry *debugfs_congestion_kb;
@@ -260,17 +260,22 @@ struct ceph_inode_xattr {
  * Ceph dentry state
  */
 struct ceph_dentry_info {
+	struct dentry *dentry;
 	struct ceph_mds_session *lease_session;
+	struct list_head lease_list;
+	unsigned flags;
 	int lease_shared_gen;
 	u32 lease_gen;
 	u32 lease_seq;
 	unsigned long lease_renew_after, lease_renew_from;
-	struct list_head lru;
-	struct dentry *dentry;
 	unsigned long time;
 	u64 offset;
 };
 
+#define CEPH_DENTRY_REFERENCED		1
+#define CEPH_DENTRY_LEASE_LIST		2
+#define CEPH_DENTRY_SHRINK_LIST		4
+
 struct ceph_inode_xattrs_info {
 	/*
 	 * (still encoded) xattr blob. we avoid the overhead of parsing
@@ -318,6 +323,8 @@ struct ceph_inode_info {
 	/* quotas */
 	u64 i_max_bytes, i_max_files;
 
+	s32 i_dir_pin;
+
 	struct rb_root i_fragtree;
 	int i_fragtree_nsplits;
 	struct mutex i_fragtree_mutex;
@@ -370,15 +377,16 @@ struct ceph_inode_info {
 	struct list_head i_unsafe_iops;   /* uncommitted mds inode ops */
 	spinlock_t i_unsafe_lock;
 
-	struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
+	union {
+		struct ceph_snap_realm *i_snap_realm; /* snap realm (if caps) */
+		struct ceph_snapid_map *i_snapid_map; /* snapid -> dev_t */
+	};
 	int i_snap_realm_counter; /* snap realm (if caps) */
 	struct list_head i_snap_realm_item;
 	struct list_head i_snap_flush_item;
 
-	struct work_struct i_wb_work;  /* writeback work */
-	struct work_struct i_pg_inv_work;  /* page invalidation work */
-
-	struct work_struct i_vmtruncate_work;
+	struct work_struct i_work;
+	unsigned long  i_work_mask;
 
 #ifdef CONFIG_CEPH_FSCACHE
 	struct fscache_cookie *fscache;
@@ -501,6 +509,13 @@ static inline struct inode *ceph_find_inode(struct super_block *sb,
 
 
 /*
+ * Masks of ceph inode work.
+ */
+#define CEPH_I_WORK_WRITEBACK		0 /* writeback */
+#define CEPH_I_WORK_INVALIDATE_PAGES	1 /* invalidate pages */
+#define CEPH_I_WORK_VMTRUNCATE		2 /* vmtruncate */
+
+/*
  * We set the ERROR_WRITE bit when we start seeing write errors on an inode
  * and then clear it when they start succeeding. Note that we do a lockless
  * check first, and only take the lock if it looks like it needs to be changed.
@@ -587,7 +602,7 @@ extern u32 ceph_choose_frag(struct ceph_inode_info *ci, u32 v,
 			    struct ceph_inode_frag *pfrag,
 			    int *found);
 
-static inline struct ceph_dentry_info *ceph_dentry(struct dentry *dentry)
+static inline struct ceph_dentry_info *ceph_dentry(const struct dentry *dentry)
 {
 	return (struct ceph_dentry_info *)dentry->d_fsdata;
 }
@@ -656,7 +671,8 @@ extern int __ceph_caps_mds_wanted(struct ceph_inode_info *ci, bool check);
 
 extern void ceph_caps_init(struct ceph_mds_client *mdsc);
 extern void ceph_caps_finalize(struct ceph_mds_client *mdsc);
-extern void ceph_adjust_min_caps(struct ceph_mds_client *mdsc, int delta);
+extern void ceph_adjust_caps_max_min(struct ceph_mds_client *mdsc,
+				     struct ceph_mount_options *fsopt);
 extern int ceph_reserve_caps(struct ceph_mds_client *mdsc,
 			     struct ceph_cap_reservation *ctx, int need);
 extern void ceph_unreserve_caps(struct ceph_mds_client *mdsc,
@@ -837,6 +853,14 @@ extern int __ceph_finish_cap_snap(struct ceph_inode_info *ci,
 				  struct ceph_cap_snap *capsnap);
 extern void ceph_cleanup_empty_realms(struct ceph_mds_client *mdsc);
 
+extern struct ceph_snapid_map *ceph_get_snapid_map(struct ceph_mds_client *mdsc,
+						   u64 snap);
+extern void ceph_put_snapid_map(struct ceph_mds_client* mdsc,
+				struct ceph_snapid_map *sm);
+extern void ceph_trim_snapid_map(struct ceph_mds_client *mdsc);
+extern void ceph_cleanup_snapid_map(struct ceph_mds_client *mdsc);
+
+
 /*
  * a cap_snap is "pending" if it is still awaiting an in-progress
  * sync write (that may/may not still update size, mtime, etc.).
@@ -853,6 +877,7 @@ extern const struct inode_operations ceph_file_iops;
 
 extern struct inode *ceph_alloc_inode(struct super_block *sb);
 extern void ceph_destroy_inode(struct inode *inode);
+extern void ceph_free_inode(struct inode *inode);
 extern int ceph_drop_inode(struct inode *inode);
 
 extern struct inode *ceph_get_inode(struct super_block *sb,
@@ -874,9 +899,9 @@ extern int ceph_inode_holds_cap(struct inode *inode, int mask);
 extern bool ceph_inode_set_size(struct inode *inode, loff_t size);
 extern void __ceph_do_pending_vmtruncate(struct inode *inode);
 extern void ceph_queue_vmtruncate(struct inode *inode);
-
 extern void ceph_queue_invalidate(struct inode *inode);
 extern void ceph_queue_writeback(struct inode *inode);
+extern void ceph_async_iput(struct inode *inode);
 
 extern int __ceph_do_getattr(struct inode *inode, struct page *locked_page,
 			     int mask, bool force);
@@ -975,11 +1000,11 @@ extern void ceph_add_cap(struct inode *inode,
 			 unsigned cap, unsigned seq, u64 realmino, int flags,
 			 struct ceph_cap **new_cap);
 extern void __ceph_remove_cap(struct ceph_cap *cap, bool queue_release);
+extern void __ceph_remove_caps(struct inode* inode);
 extern void ceph_put_cap(struct ceph_mds_client *mdsc,
 			 struct ceph_cap *cap);
 extern int ceph_is_any_caps(struct inode *inode);
 
-extern void ceph_queue_caps_release(struct inode *inode);
 extern int ceph_write_inode(struct inode *inode, struct writeback_control *wbc);
 extern int ceph_fsync(struct file *file, loff_t start, loff_t end,
 		      int datasync);
@@ -1049,10 +1074,10 @@ extern int ceph_handle_snapdir(struct ceph_mds_request *req,
 extern struct dentry *ceph_finish_lookup(struct ceph_mds_request *req,
 					 struct dentry *dentry, int err);
 
-extern void ceph_dentry_lru_add(struct dentry *dn);
-extern void ceph_dentry_lru_touch(struct dentry *dn);
-extern void ceph_dentry_lru_del(struct dentry *dn);
+extern void __ceph_dentry_lease_touch(struct ceph_dentry_info *di);
+extern void __ceph_dentry_dir_lease_touch(struct ceph_dentry_info *di);
 extern void ceph_invalidate_dentry_lease(struct dentry *dentry);
+extern int ceph_trim_dentries(struct ceph_mds_client *mdsc);
 extern unsigned ceph_dentry_hash(struct inode *dir, struct dentry *dn);
 extern void ceph_readdir_cache_release(struct ceph_readdir_cache_control *ctl);
 
@@ -1061,6 +1086,7 @@ extern long ceph_ioctl(struct file *file, unsigned int cmd, unsigned long arg);
 
 /* export.c */
 extern const struct export_operations ceph_export_ops;
+struct inode *ceph_lookup_inode(struct super_block *sb, u64 ino);
 
 /* locks.c */
 extern __init void ceph_flock_init(void);
@@ -1076,7 +1102,7 @@ extern int ceph_locks_to_pagelist(struct ceph_filelock *flocks,
 				  int num_fcntl_locks, int num_flock_locks);
 
 /* debugfs.c */
-extern int ceph_fs_debugfs_init(struct ceph_fs_client *client);
+extern void ceph_fs_debugfs_init(struct ceph_fs_client *client);
 extern void ceph_fs_debugfs_cleanup(struct ceph_fs_client *client);
 
 /* quota.c */
@@ -1111,5 +1137,6 @@ extern bool ceph_quota_is_max_bytes_approaching(struct inode *inode,
 						loff_t newlen);
 extern bool ceph_quota_update_statfs(struct ceph_fs_client *fsc,
 				     struct kstatfs *buf);
+extern void ceph_cleanup_quotarealms_inodes(struct ceph_mds_client *mdsc);
 
 #endif /* _FS_CEPH_SUPER_H */
diff --git a/fs/ceph/xattr.c b/fs/ceph/xattr.c
index 316f6ad10644..0cc42c8879e9 100644
--- a/fs/ceph/xattr.c
+++ b/fs/ceph/xattr.c
@@ -228,8 +228,19 @@ static size_t ceph_vxattrcb_dir_rctime(struct ceph_inode_info *ci, char *val,
 			ci->i_rctime.tv_nsec);
 }
 
-/* quotas */
+/* dir pin */
+static bool ceph_vxattrcb_dir_pin_exists(struct ceph_inode_info *ci)
+{
+	return ci->i_dir_pin != -ENODATA;
+}
+
+static size_t ceph_vxattrcb_dir_pin(struct ceph_inode_info *ci, char *val,
+                                    size_t size)
+{
+	return snprintf(val, size, "%d", (int)ci->i_dir_pin);
+}
 
+/* quotas */
 static bool ceph_vxattrcb_quota_exists(struct ceph_inode_info *ci)
 {
 	bool ret = false;
@@ -315,6 +326,13 @@ static struct ceph_vxattr ceph_dir_vxattrs[] = {
 	XATTR_RSTAT_FIELD(dir, rbytes),
 	XATTR_RSTAT_FIELD(dir, rctime),
 	{
+		.name = "ceph.dir.pin",
+		.name_size = sizeof("ceph.dir_pin"),
+		.getxattr_cb = ceph_vxattrcb_dir_pin,
+		.exists_cb = ceph_vxattrcb_dir_pin_exists,
+		.flags = VXATTR_FLAG_HIDDEN,
+	},
+	{
 		.name = "ceph.quota",
 		.name_size = sizeof("ceph.quota"),
 		.getxattr_cb = ceph_vxattrcb_quota,
diff --git a/fs/char_dev.c b/fs/char_dev.c
index a279c58fe360..00dfe17871ac 100644
--- a/fs/char_dev.c
+++ b/fs/char_dev.c
@@ -88,22 +88,31 @@ static int find_dynamic_major(void)
 /*
  * Register a single major with a specified minor range.
  *
- * If major == 0 this functions will dynamically allocate a major and return
- * its number.
- *
- * If major > 0 this function will attempt to reserve the passed range of
- * minors and will return zero on success.
+ * If major == 0 this function will dynamically allocate an unused major.
+ * If major > 0 this function will attempt to reserve the range of minors
+ * with given major.
  *
- * Returns a -ve errno on failure.
  */
 static struct char_device_struct *
 __register_chrdev_region(unsigned int major, unsigned int baseminor,
 			   int minorct, const char *name)
 {
-	struct char_device_struct *cd, **cp;
-	int ret = 0;
+	struct char_device_struct *cd, *curr, *prev = NULL;
+	int ret;
 	int i;
 
+	if (major >= CHRDEV_MAJOR_MAX) {
+		pr_err("CHRDEV \"%s\" major requested (%u) is greater than the maximum (%u)\n",
+		       name, major, CHRDEV_MAJOR_MAX-1);
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (minorct > MINORMASK + 1 - baseminor) {
+		pr_err("CHRDEV \"%s\" minor range requested (%u-%u) is out of range of maximum range (%u-%u) for a single major\n",
+			name, baseminor, baseminor + minorct - 1, 0, MINORMASK);
+		return ERR_PTR(-EINVAL);
+	}
+
 	cd = kzalloc(sizeof(struct char_device_struct), GFP_KERNEL);
 	if (cd == NULL)
 		return ERR_PTR(-ENOMEM);
@@ -120,10 +129,21 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
 		major = ret;
 	}
 
-	if (major >= CHRDEV_MAJOR_MAX) {
-		pr_err("CHRDEV \"%s\" major requested (%u) is greater than the maximum (%u)\n",
-		       name, major, CHRDEV_MAJOR_MAX-1);
-		ret = -EINVAL;
+	ret = -EBUSY;
+	i = major_to_index(major);
+	for (curr = chrdevs[i]; curr; prev = curr, curr = curr->next) {
+		if (curr->major < major)
+			continue;
+
+		if (curr->major > major)
+			break;
+
+		if (curr->baseminor + curr->minorct <= baseminor)
+			continue;
+
+		if (curr->baseminor >= baseminor + minorct)
+			break;
+
 		goto out;
 	}
 
@@ -132,37 +152,14 @@ __register_chrdev_region(unsigned int major, unsigned int baseminor,
 	cd->minorct = minorct;
 	strlcpy(cd->name, name, sizeof(cd->name));
 
-	i = major_to_index(major);
-
-	for (cp = &chrdevs[i]; *cp; cp = &(*cp)->next)
-		if ((*cp)->major > major ||
-		    ((*cp)->major == major &&
-		     (((*cp)->baseminor >= baseminor) ||
-		      ((*cp)->baseminor + (*cp)->minorct > baseminor))))
-			break;
-
-	/* Check for overlapping minor ranges.  */
-	if (*cp && (*cp)->major == major) {
-		int old_min = (*cp)->baseminor;
-		int old_max = (*cp)->baseminor + (*cp)->minorct - 1;
-		int new_min = baseminor;
-		int new_max = baseminor + minorct - 1;
-
-		/* New driver overlaps from the left.  */
-		if (new_max >= old_min && new_max <= old_max) {
-			ret = -EBUSY;
-			goto out;
-		}
-
-		/* New driver overlaps from the right.  */
-		if (new_min <= old_max && new_min >= old_min) {
-			ret = -EBUSY;
-			goto out;
-		}
+	if (!prev) {
+		cd->next = curr;
+		chrdevs[i] = cd;
+	} else {
+		cd->next = prev->next;
+		prev->next = cd;
 	}
 
-	cd->next = *cp;
-	*cp = cd;
 	mutex_unlock(&chrdevs_lock);
 	return cd;
 out:
diff --git a/fs/cifs/Kconfig b/fs/cifs/Kconfig
index f1ddc9d03c10..523e9ea78a28 100644
--- a/fs/cifs/Kconfig
+++ b/fs/cifs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config CIFS
 	tristate "SMB3 and CIFS support (advanced network filesystem)"
 	depends on INET
@@ -9,7 +10,7 @@ config CIFS
 	select CRYPTO_SHA512
 	select CRYPTO_CMAC
 	select CRYPTO_HMAC
-	select CRYPTO_ARC4
+	select CRYPTO_LIB_ARC4
 	select CRYPTO_AEAD2
 	select CRYPTO_CCM
 	select CRYPTO_ECB
@@ -117,25 +118,25 @@ config CIFS_UPCALL
 	  secure Kerberos authentication is required). If unsure, say Y.
 
 config CIFS_XATTR
-        bool "CIFS extended attributes"
-        depends on CIFS
-        help
-          Extended attributes are name:value pairs associated with inodes by
-          the kernel or by users (see the attr(5) manual page for details).
-          CIFS maps the name of extended attributes beginning with the user
-          namespace prefix to SMB/CIFS EAs.  EAs are stored on Windows
-          servers without the user namespace prefix, but their names are
-          seen by Linux cifs clients prefaced by the user namespace prefix.
-          The system namespace (used by some filesystems to store ACLs) is
-          not supported at this time.
-
-          If unsure, say Y.
+	bool "CIFS extended attributes"
+	depends on CIFS
+	help
+	  Extended attributes are name:value pairs associated with inodes by
+	  the kernel or by users (see the attr(5) manual page for details).
+	  CIFS maps the name of extended attributes beginning with the user
+	  namespace prefix to SMB/CIFS EAs.  EAs are stored on Windows
+	  servers without the user namespace prefix, but their names are
+	  seen by Linux cifs clients prefaced by the user namespace prefix.
+	  The system namespace (used by some filesystems to store ACLs) is
+	  not supported at this time.
+
+	  If unsure, say Y.
 
 config CIFS_POSIX
-        bool "CIFS POSIX Extensions"
-        depends on CIFS && CIFS_ALLOW_INSECURE_LEGACY && CIFS_XATTR
-        help
-          Enabling this option will cause the cifs client to attempt to
+	bool "CIFS POSIX Extensions"
+	depends on CIFS && CIFS_ALLOW_INSECURE_LEGACY && CIFS_XATTR
+	help
+	  Enabling this option will cause the cifs client to attempt to
 	  negotiate a newer dialect with servers, such as Samba 3.0.5
 	  or later, that optionally can handle more POSIX like (rather
 	  than Windows like) file behavior.  It also enables
@@ -144,61 +145,62 @@ config CIFS_POSIX
 	  CIFS POSIX ACL support.  If unsure, say N.
 
 config CIFS_ACL
-	  bool "Provide CIFS ACL support"
-	  depends on CIFS_XATTR && KEYS
-	  help
-	    Allows fetching CIFS/NTFS ACL from the server.  The DACL blob
-	    is handed over to the application/caller.  See the man
-	    page for getcifsacl for more information.  If unsure, say Y.
+	bool "Provide CIFS ACL support"
+	depends on CIFS_XATTR && KEYS
+	help
+	  Allows fetching CIFS/NTFS ACL from the server.  The DACL blob
+	  is handed over to the application/caller.  See the man
+	  page for getcifsacl for more information.  If unsure, say Y.
 
 config CIFS_DEBUG
 	bool "Enable CIFS debugging routines"
 	default y
 	depends on CIFS
 	help
-	   Enabling this option adds helpful debugging messages to
-	   the cifs code which increases the size of the cifs module.
-	   If unsure, say Y.
+	  Enabling this option adds helpful debugging messages to
+	  the cifs code which increases the size of the cifs module.
+	  If unsure, say Y.
+
 config CIFS_DEBUG2
 	bool "Enable additional CIFS debugging routines"
 	depends on CIFS_DEBUG
 	help
-	   Enabling this option adds a few more debugging routines
-	   to the cifs code which slightly increases the size of
-	   the cifs module and can cause additional logging of debug
-	   messages in some error paths, slowing performance. This
-	   option can be turned off unless you are debugging
-	   cifs problems.  If unsure, say N.
+	  Enabling this option adds a few more debugging routines
+	  to the cifs code which slightly increases the size of
+	  the cifs module and can cause additional logging of debug
+	  messages in some error paths, slowing performance. This
+	  option can be turned off unless you are debugging
+	  cifs problems.  If unsure, say N.
 
 config CIFS_DEBUG_DUMP_KEYS
 	bool "Dump encryption keys for offline decryption (Unsafe)"
 	depends on CIFS_DEBUG
 	help
-	   Enabling this will dump the encryption and decryption keys
-	   used to communicate on an encrypted share connection on the
-	   console. This allows Wireshark to decrypt and dissect
-	   encrypted network captures. Enable this carefully.
-	   If unsure, say N.
+	  Enabling this will dump the encryption and decryption keys
+	  used to communicate on an encrypted share connection on the
+	  console. This allows Wireshark to decrypt and dissect
+	  encrypted network captures. Enable this carefully.
+	  If unsure, say N.
 
 config CIFS_DFS_UPCALL
-	  bool "DFS feature support"
-	  depends on CIFS && KEYS
-	  select DNS_RESOLVER
-	  help
-	    Distributed File System (DFS) support is used to access shares
-	    transparently in an enterprise name space, even if the share
-	    moves to a different server.  This feature also enables
-	    an upcall mechanism for CIFS which contacts userspace helper
-	    utilities to provide server name resolution (host names to
-	    IP addresses) which is needed in order to reconnect to
-	    servers if their addresses change or for implicit mounts of
-	    DFS junction points. If unsure, say Y.
+	bool "DFS feature support"
+	depends on CIFS && KEYS
+	select DNS_RESOLVER
+	help
+	  Distributed File System (DFS) support is used to access shares
+	  transparently in an enterprise name space, even if the share
+	  moves to a different server.  This feature also enables
+	  an upcall mechanism for CIFS which contacts userspace helper
+	  utilities to provide server name resolution (host names to
+	  IP addresses) which is needed in order to reconnect to
+	  servers if their addresses change or for implicit mounts of
+	  DFS junction points. If unsure, say Y.
 
 config CIFS_NFSD_EXPORT
-	  bool "Allow nfsd to export CIFS file system"
-	  depends on CIFS && BROKEN
-	  help
-	   Allows NFS server to export a CIFS mounted share (nfsd over cifs)
+	bool "Allow nfsd to export CIFS file system"
+	depends on CIFS && BROKEN
+	help
+	  Allows NFS server to export a CIFS mounted share (nfsd over cifs)
 
 config CIFS_SMB_DIRECT
 	bool "SMB Direct support (Experimental)"
@@ -209,10 +211,9 @@ config CIFS_SMB_DIRECT
 	  say N.
 
 config CIFS_FSCACHE
-	  bool "Provide CIFS client caching support"
-	  depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
-	  help
-	    Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
-	    to be cached locally on disk through the general filesystem cache
-	    manager. If unsure, say N.
-
+	bool "Provide CIFS client caching support"
+	depends on CIFS=m && FSCACHE || CIFS=y && FSCACHE=y
+	help
+	  Makes CIFS FS-Cache capable. Say Y here if you want your CIFS data
+	  to be cached locally on disk through the general filesystem cache
+	  manager. If unsure, say N.
diff --git a/fs/cifs/asn1.c b/fs/cifs/asn1.c
index 3d19595eb352..689162e2e175 100644
--- a/fs/cifs/asn1.c
+++ b/fs/cifs/asn1.c
@@ -1,20 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * The ASB.1/BER parsing code is derived from ip_nat_snmp_basic.c which was in
  * turn derived from the gxsnmp package by Gregory McLean & Jochen Friedrich
  *
  * Copyright (c) 2000 RP Internet (www.rpi.net.au).
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  */
 
 #include <linux/module.h>
diff --git a/fs/cifs/cifs_debug.c b/fs/cifs/cifs_debug.c
index e92a2fee3c57..ec933fb0b36e 100644
--- a/fs/cifs/cifs_debug.c
+++ b/fs/cifs/cifs_debug.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   fs/cifs_debug.c
  *
  *   Copyright (C) International Business Machines  Corp., 2000,2005
  *
  *   Modified by Steve French (sfrench@us.ibm.com)
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #include <linux/fs.h>
 #include <linux/string.h>
@@ -115,7 +102,12 @@ static void cifs_debug_tcon(struct seq_file *m, struct cifs_tcon *tcon)
 		seq_puts(m, " type: CDROM ");
 	else
 		seq_printf(m, " type: %d ", dev_type);
-	if (tcon->seal)
+
+	seq_printf(m, "Serial Number: 0x%x", tcon->vol_serial_number);
+
+	if ((tcon->seal) ||
+	    (tcon->ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA) ||
+	    (tcon->share_flags & SHI1005_FLAGS_ENCRYPT_DATA))
 		seq_printf(m, " Encrypted");
 	if (tcon->nocase)
 		seq_printf(m, " nocase");
@@ -307,12 +299,10 @@ static int cifs_debug_data_proc_show(struct seq_file *m, void *v)
 			atomic_read(&server->smbd_conn->send_credits),
 			atomic_read(&server->smbd_conn->receive_credits),
 			server->smbd_conn->receive_credit_target);
-		seq_printf(m, "\nPending send_pending: %x send_payload_pending:"
-			" %x smbd_send_pending: %x smbd_recv_pending: %x",
+		seq_printf(m, "\nPending send_pending: %x "
+			"send_payload_pending: %x",
 			atomic_read(&server->smbd_conn->send_pending),
-			atomic_read(&server->smbd_conn->send_payload_pending),
-			server->smbd_conn->smbd_send_pending,
-			server->smbd_conn->smbd_recv_pending);
+			atomic_read(&server->smbd_conn->send_payload_pending));
 		seq_printf(m, "\nReceive buffers count_receive_queue: %x "
 			"count_empty_packet_queue: %x",
 			server->smbd_conn->count_receive_queue,
@@ -329,6 +319,12 @@ skip_rdma:
 #endif
 		seq_printf(m, "\nNumber of credits: %d Dialect 0x%x",
 			server->credits,  server->dialect);
+		if (server->compress_algorithm == SMB3_COMPRESS_LZNT1)
+			seq_printf(m, " COMPRESS_LZNT1");
+		else if (server->compress_algorithm == SMB3_COMPRESS_LZ77)
+			seq_printf(m, " COMPRESS_LZ77");
+		else if (server->compress_algorithm == SMB3_COMPRESS_LZ77_HUFF)
+			seq_printf(m, " COMPRESS_LZ77_HUFF");
 		if (server->sign)
 			seq_printf(m, " signed");
 		if (server->posix_ext_supported)
@@ -371,6 +367,12 @@ skip_rdma:
 				atomic_read(&server->in_send),
 				atomic_read(&server->num_waiters));
 #endif
+			/* dump session id helpful for use with network trace */
+			seq_printf(m, " SessionId: 0x%llx", ses->Suid);
+			if (ses->session_flags & SMB2_SESSION_FLAG_ENCRYPT_DATA)
+				seq_puts(m, " encrypted");
+			if (ses->sign)
+				seq_puts(m, " signed");
 
 			seq_puts(m, "\n\tShares:");
 			j = 0;
@@ -453,8 +455,13 @@ static ssize_t cifs_stats_proc_write(struct file *file,
 			server = list_entry(tmp1, struct TCP_Server_Info,
 					    tcp_ses_list);
 #ifdef CONFIG_CIFS_STATS2
-			for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++)
+			for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
+				atomic_set(&server->num_cmds[i], 0);
 				atomic_set(&server->smb2slowcmd[i], 0);
+				server->time_per_cmd[i] = 0;
+				server->slowest_cmd[i] = 0;
+				server->fastest_cmd[0] = 0;
+			}
 #endif /* CONFIG_CIFS_STATS2 */
 			list_for_each(tmp2, &server->smb_ses_list) {
 				ses = list_entry(tmp2, struct cifs_ses,
@@ -522,9 +529,19 @@ static int cifs_stats_proc_show(struct seq_file *m, void *v)
 		server = list_entry(tmp1, struct TCP_Server_Info,
 				    tcp_ses_list);
 #ifdef CONFIG_CIFS_STATS2
+		seq_puts(m, "\nTotal time spent processing by command. Time ");
+		seq_printf(m, "units are jiffies (%d per second)\n", HZ);
+		seq_puts(m, "  SMB3 CMD\tNumber\tTotal Time\tFastest\tSlowest\n");
+		seq_puts(m, "  --------\t------\t----------\t-------\t-------\n");
+		for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
+			seq_printf(m, "  %d\t\t%d\t%llu\t\t%u\t%u\n", j,
+				atomic_read(&server->num_cmds[j]),
+				server->time_per_cmd[j],
+				server->fastest_cmd[j],
+				server->slowest_cmd[j]);
 		for (j = 0; j < NUMBER_OF_SMB2_COMMANDS; j++)
 			if (atomic_read(&server->smb2slowcmd[j]))
-				seq_printf(m, "%d slow responses from %s for command %d\n",
+				seq_printf(m, "  %d slow responses from %s for command %d\n",
 					atomic_read(&server->smb2slowcmd[j]),
 					server->hostname, j);
 #endif /* STATS2 */
diff --git a/fs/cifs/cifs_debug.h b/fs/cifs/cifs_debug.h
index 631dc1bb21c1..3d392620a2f4 100644
--- a/fs/cifs/cifs_debug.h
+++ b/fs/cifs/cifs_debug.h
@@ -1,22 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *
  *   Copyright (c) International Business Machines  Corp., 2000,2002
  *   Modified by Steve French (sfrench@us.ibm.com)
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
 */
 
 #ifndef _H_CIFS_DEBUG
diff --git a/fs/cifs/cifs_dfs_ref.c b/fs/cifs/cifs_dfs_ref.c
index d9b99abe1243..41957b82d796 100644
--- a/fs/cifs/cifs_dfs_ref.c
+++ b/fs/cifs/cifs_dfs_ref.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Contains the CIFS DFS referral mounting routines used for handling
  *   traversal via DFS junction point
@@ -6,10 +7,6 @@
  *   Copyright (C) International Business Machines  Corp., 2008
  *   Author(s): Igor Mammedov (niallain@gmail.com)
  *		Steve French (sfrench@us.ibm.com)
- *   This program is free software; you can redistribute it and/or
- *   modify it under the terms of the GNU General Public License
- *   as published by the Free Software Foundation; either version
- *   2 of the License, or (at your option) any later version.
  */
 
 #include <linux/dcache.h>
@@ -285,9 +282,9 @@ static void dump_referral(const struct dfs_info3_param *ref)
 {
 	cifs_dbg(FYI, "DFS: ref path: %s\n", ref->path_name);
 	cifs_dbg(FYI, "DFS: node path: %s\n", ref->node_name);
-	cifs_dbg(FYI, "DFS: fl: %hd, srv_type: %hd\n",
+	cifs_dbg(FYI, "DFS: fl: %d, srv_type: %d\n",
 		 ref->flags, ref->server_type);
-	cifs_dbg(FYI, "DFS: ref_flags: %hd, path_consumed: %hd\n",
+	cifs_dbg(FYI, "DFS: ref_flags: %d, path_consumed: %d\n",
 		 ref->ref_flag, ref->path_consumed);
 }
 
diff --git a/fs/cifs/cifs_fs_sb.h b/fs/cifs/cifs_fs_sb.h
index 42f0d67f1054..ed49222abecb 100644
--- a/fs/cifs/cifs_fs_sb.h
+++ b/fs/cifs/cifs_fs_sb.h
@@ -58,6 +58,7 @@ struct cifs_sb_info {
 	spinlock_t tlink_tree_lock;
 	struct tcon_link *master_tlink;
 	struct nls_table *local_nls;
+	unsigned int bsize;
 	unsigned int rsize;
 	unsigned int wsize;
 	unsigned long actimeo; /* attribute cache timeout (jiffies) */
diff --git a/fs/cifs/cifs_ioctl.h b/fs/cifs/cifs_ioctl.h
index d8bce2f862de..086ddc5108af 100644
--- a/fs/cifs/cifs_ioctl.h
+++ b/fs/cifs/cifs_ioctl.h
@@ -43,6 +43,9 @@ struct smb_snapshot_array {
 	/*	snapshots[]; */
 } __packed;
 
+/* query_info flags */
+#define PASSTHRU_QUERY_INFO	0x00000000
+#define PASSTHRU_FSCTL		0x00000001
 struct smb_query_info {
 	__u32   info_type;
 	__u32   file_info_class;
diff --git a/fs/cifs/cifs_unicode.c b/fs/cifs/cifs_unicode.c
index a2b2355e7f01..498777d859eb 100644
--- a/fs/cifs/cifs_unicode.c
+++ b/fs/cifs/cifs_unicode.c
@@ -1,22 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   fs/cifs/cifs_unicode.c
  *
  *   Copyright (c) International Business Machines  Corp., 2000,2009
  *   Modified by Steve French (sfrench@us.ibm.com)
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #include <linux/fs.h>
 #include <linux/slab.h>
diff --git a/fs/cifs/cifs_unicode.h b/fs/cifs/cifs_unicode.h
index 8360b74530a9..80b3d845419f 100644
--- a/fs/cifs/cifs_unicode.h
+++ b/fs/cifs/cifs_unicode.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * cifs_unicode:  Unicode kernel case support
  *
@@ -7,28 +8,12 @@
  *
  *   Copyright (c) International Business Machines  Corp., 2000,2009
  *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
- *
  * Notes:
  *     These APIs are based on the C library functions.  The semantics
  *     should match the C functions but with expanded size operands.
  *
  *     The upper/lower functions are based on a table created by mkupr.
  *     This is a compressed table of upper and lower case conversion.
- *
  */
 #ifndef _CIFS_UNICODE_H
 #define _CIFS_UNICODE_H
diff --git a/fs/cifs/cifs_uniupr.h b/fs/cifs/cifs_uniupr.h
index 0ac7c5a8633a..7b272fcdf0d3 100644
--- a/fs/cifs/cifs_uniupr.h
+++ b/fs/cifs/cifs_uniupr.h
@@ -1,22 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (c) International Business Machines  Corp., 2000,2002
  *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
  * uniupr.h - Unicode compressed case ranges
- *
 */
 
 #ifndef UNIUPR_NOUPPER
diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index d2a05e46d6f5..97b7497c13ef 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -33,7 +33,8 @@
 #include <linux/ctype.h>
 #include <linux/random.h>
 #include <linux/highmem.h>
-#include <crypto/skcipher.h>
+#include <linux/fips.h>
+#include <crypto/arc4.h>
 #include <crypto/aead.h>
 
 int __cifs_calc_signature(struct smb_rqst *rqst,
@@ -772,63 +773,32 @@ setup_ntlmv2_rsp_ret:
 int
 calc_seckey(struct cifs_ses *ses)
 {
-	int rc;
-	struct crypto_skcipher *tfm_arc4;
-	struct scatterlist sgin, sgout;
-	struct skcipher_request *req;
-	unsigned char *sec_key;
+	unsigned char sec_key[CIFS_SESS_KEY_SIZE]; /* a nonce */
+	struct arc4_ctx *ctx_arc4;
 
-	sec_key = kmalloc(CIFS_SESS_KEY_SIZE, GFP_KERNEL);
-	if (sec_key == NULL)
-		return -ENOMEM;
+	if (fips_enabled)
+		return -ENODEV;
 
 	get_random_bytes(sec_key, CIFS_SESS_KEY_SIZE);
 
-	tfm_arc4 = crypto_alloc_skcipher("ecb(arc4)", 0, CRYPTO_ALG_ASYNC);
-	if (IS_ERR(tfm_arc4)) {
-		rc = PTR_ERR(tfm_arc4);
-		cifs_dbg(VFS, "could not allocate crypto API arc4\n");
-		goto out;
-	}
-
-	rc = crypto_skcipher_setkey(tfm_arc4, ses->auth_key.response,
-					CIFS_SESS_KEY_SIZE);
-	if (rc) {
-		cifs_dbg(VFS, "%s: Could not set response as a key\n",
-			 __func__);
-		goto out_free_cipher;
-	}
-
-	req = skcipher_request_alloc(tfm_arc4, GFP_KERNEL);
-	if (!req) {
-		rc = -ENOMEM;
-		cifs_dbg(VFS, "could not allocate crypto API arc4 request\n");
-		goto out_free_cipher;
+	ctx_arc4 = kmalloc(sizeof(*ctx_arc4), GFP_KERNEL);
+	if (!ctx_arc4) {
+		cifs_dbg(VFS, "could not allocate arc4 context\n");
+		return -ENOMEM;
 	}
 
-	sg_init_one(&sgin, sec_key, CIFS_SESS_KEY_SIZE);
-	sg_init_one(&sgout, ses->ntlmssp->ciphertext, CIFS_CPHTXT_SIZE);
-
-	skcipher_request_set_callback(req, 0, NULL, NULL);
-	skcipher_request_set_crypt(req, &sgin, &sgout, CIFS_CPHTXT_SIZE, NULL);
-
-	rc = crypto_skcipher_encrypt(req);
-	skcipher_request_free(req);
-	if (rc) {
-		cifs_dbg(VFS, "could not encrypt session key rc: %d\n", rc);
-		goto out_free_cipher;
-	}
+	arc4_setkey(ctx_arc4, ses->auth_key.response, CIFS_SESS_KEY_SIZE);
+	arc4_crypt(ctx_arc4, ses->ntlmssp->ciphertext, sec_key,
+		   CIFS_CPHTXT_SIZE);
 
 	/* make secondary_key/nonce as session key */
 	memcpy(ses->auth_key.response, sec_key, CIFS_SESS_KEY_SIZE);
 	/* and make len as that of session key only */
 	ses->auth_key.len = CIFS_SESS_KEY_SIZE;
 
-out_free_cipher:
-	crypto_free_skcipher(tfm_arc4);
-out:
-	kfree(sec_key);
-	return rc;
+	memzero_explicit(sec_key, CIFS_SESS_KEY_SIZE);
+	kzfree(ctx_arc4);
+	return 0;
 }
 
 void
diff --git a/fs/cifs/cifsfs.c b/fs/cifs/cifsfs.c
index 62d48d486d8f..24635b65effa 100644
--- a/fs/cifs/cifsfs.c
+++ b/fs/cifs/cifsfs.c
@@ -303,6 +303,7 @@ cifs_alloc_inode(struct super_block *sb)
 	cifs_inode->uniqueid = 0;
 	cifs_inode->createtime = 0;
 	cifs_inode->epoch = 0;
+	spin_lock_init(&cifs_inode->open_file_lock);
 	generate_random_uuid(cifs_inode->lease_key);
 
 	/*
@@ -315,16 +316,10 @@ cifs_alloc_inode(struct super_block *sb)
 	return &cifs_inode->vfs_inode;
 }
 
-static void cifs_i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
-}
-
 static void
-cifs_destroy_inode(struct inode *inode)
+cifs_free_inode(struct inode *inode)
 {
-	call_rcu(&inode->i_rcu, cifs_i_callback);
+	kmem_cache_free(cifs_inode_cachep, CIFS_I(inode));
 }
 
 static void
@@ -381,7 +376,7 @@ cifs_show_security(struct seq_file *s, struct cifs_ses *ses)
 		seq_puts(s, "ntlm");
 		break;
 	case Kerberos:
-		seq_puts(s, "krb5");
+		seq_printf(s, "krb5,cruid=%u", from_kuid_munged(&init_user_ns,ses->cred_uid));
 		break;
 	case RawNTLMSSP:
 		seq_puts(s, "ntlmssp");
@@ -489,6 +484,8 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
 		seq_puts(s, ",seal");
 	if (tcon->nocase)
 		seq_puts(s, ",nocase");
+	if (tcon->local_lease)
+		seq_puts(s, ",locallease");
 	if (tcon->retry)
 		seq_puts(s, ",hard");
 	else
@@ -554,10 +551,13 @@ cifs_show_options(struct seq_file *s, struct dentry *root)
 
 	seq_printf(s, ",rsize=%u", cifs_sb->rsize);
 	seq_printf(s, ",wsize=%u", cifs_sb->wsize);
+	seq_printf(s, ",bsize=%u", cifs_sb->bsize);
 	seq_printf(s, ",echo_interval=%lu",
 			tcon->ses->server->echo_interval / HZ);
 	if (tcon->snapshot_time)
 		seq_printf(s, ",snapshot=%llu", tcon->snapshot_time);
+	if (tcon->handle_timeout)
+		seq_printf(s, ",handletimeout=%u", tcon->handle_timeout);
 	/* convert actimeo and display it in seconds */
 	seq_printf(s, ",actimeo=%lu", cifs_sb->actimeo / HZ);
 
@@ -627,7 +627,7 @@ static int cifs_drop_inode(struct inode *inode)
 static const struct super_operations cifs_super_ops = {
 	.statfs = cifs_statfs,
 	.alloc_inode = cifs_alloc_inode,
-	.destroy_inode = cifs_destroy_inode,
+	.free_inode = cifs_free_inode,
 	.drop_inode	= cifs_drop_inode,
 	.evict_inode	= cifs_evict_inode,
 /*	.delete_inode	= cifs_delete_inode,  */  /* Do not need above
@@ -879,6 +879,9 @@ out:
 
 static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
 {
+	struct cifsFileInfo *cfile = file->private_data;
+	struct cifs_tcon *tcon;
+
 	/*
 	 * whence == SEEK_END || SEEK_DATA || SEEK_HOLE => we must revalidate
 	 * the cached file length
@@ -910,6 +913,12 @@ static loff_t cifs_llseek(struct file *file, loff_t offset, int whence)
 		if (rc < 0)
 			return (loff_t)rc;
 	}
+	if (cfile && cfile->tlink) {
+		tcon = tlink_tcon(cfile->tlink);
+		if (tcon->ses->server->ops->llseek)
+			return tcon->ses->server->ops->llseek(file, tcon,
+							      offset, whence);
+	}
 	return generic_file_llseek(file, offset, whence);
 }
 
@@ -987,6 +996,7 @@ const struct inode_operations cifs_file_inode_ops = {
 	.getattr = cifs_getattr,
 	.permission = cifs_permission,
 	.listxattr = cifs_listxattr,
+	.fiemap = cifs_fiemap,
 };
 
 const struct inode_operations cifs_symlink_inode_ops = {
@@ -1007,7 +1017,7 @@ static loff_t cifs_remap_file_range(struct file *src_file, loff_t off,
 	unsigned int xid;
 	int rc;
 
-	if (remap_flags & ~REMAP_FILE_ADVISORY)
+	if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
 		return -EINVAL;
 
 	cifs_dbg(FYI, "clone range\n");
@@ -1070,11 +1080,6 @@ ssize_t cifs_file_copychunk_range(unsigned int xid,
 
 	cifs_dbg(FYI, "copychunk range\n");
 
-	if (src_inode == target_inode) {
-		rc = -EINVAL;
-		goto out;
-	}
-
 	if (!src_file->private_data || !dst_file->private_data) {
 		rc = -EBADF;
 		cifs_dbg(VFS, "missing cifsFileInfo on copy range src file\n");
@@ -1144,6 +1149,10 @@ static ssize_t cifs_copy_file_range(struct file *src_file, loff_t off,
 	rc = cifs_file_copychunk_range(xid, src_file, off, dst_file, destoff,
 					len, flags);
 	free_xid(xid);
+
+	if (rc == -EOPNOTSUPP || rc == -EXDEV)
+		rc = generic_copy_file_range(src_file, off, dst_file,
+					     destoff, len, flags);
 	return rc;
 }
 
@@ -1586,7 +1595,6 @@ MODULE_DESCRIPTION
 	("VFS to access SMB3 servers e.g. Samba, Macs, Azure and Windows (and "
 	"also older servers complying with the SNIA CIFS Specification)");
 MODULE_VERSION(CIFS_VERSION);
-MODULE_SOFTDEP("pre: arc4");
 MODULE_SOFTDEP("pre: des");
 MODULE_SOFTDEP("pre: ecb");
 MODULE_SOFTDEP("pre: hmac");
diff --git a/fs/cifs/cifsfs.h b/fs/cifs/cifsfs.h
index 7652551a1fc4..aea005703785 100644
--- a/fs/cifs/cifsfs.h
+++ b/fs/cifs/cifsfs.h
@@ -84,6 +84,8 @@ extern int cifs_revalidate_mapping(struct inode *inode);
 extern int cifs_zap_mapping(struct inode *inode);
 extern int cifs_getattr(const struct path *, struct kstat *, u32, unsigned int);
 extern int cifs_setattr(struct dentry *, struct iattr *);
+extern int cifs_fiemap(struct inode *, struct fiemap_extent_info *, u64 start,
+		       u64 len);
 
 extern const struct inode_operations cifs_file_inode_ops;
 extern const struct inode_operations cifs_symlink_inode_ops;
@@ -150,5 +152,5 @@ extern long cifs_ioctl(struct file *filep, unsigned int cmd, unsigned long arg);
 extern const struct export_operations cifs_export_ops;
 #endif /* CONFIG_CIFS_NFSD_EXPORT */
 
-#define CIFS_VERSION   "2.17"
+#define CIFS_VERSION   "2.20"
 #endif				/* _CIFSFS_H */
diff --git a/fs/cifs/cifsglob.h b/fs/cifs/cifsglob.h
index 94dbdbe5be34..4777b3c4a92c 100644
--- a/fs/cifs/cifsglob.h
+++ b/fs/cifs/cifsglob.h
@@ -60,6 +60,12 @@
 #define CIFS_MAX_ACTIMEO (1 << 30)
 
 /*
+ * Max persistent and resilient handle timeout (milliseconds).
+ * Windows durable max was 960000 (16 minutes)
+ */
+#define SMB3_MAX_HANDLE_TIMEOUT 960000
+
+/*
  * MAX_REQ is the maximum number of requests that WE will send
  * on one socket concurrently.
  */
@@ -216,6 +222,7 @@ struct cifs_io_parms;
 struct cifs_search_info;
 struct cifsInodeInfo;
 struct cifs_open_parms;
+struct cifs_credits;
 
 struct smb_version_operations {
 	int (*send_cancel)(struct TCP_Server_Info *, struct smb_rqst *,
@@ -230,12 +237,15 @@ struct smb_version_operations {
 	/* check response: verify signature, map error */
 	int (*check_receive)(struct mid_q_entry *, struct TCP_Server_Info *,
 			     bool);
-	void (*add_credits)(struct TCP_Server_Info *, const unsigned int,
-			    const int);
+	void (*add_credits)(struct TCP_Server_Info *server,
+			    const struct cifs_credits *credits,
+			    const int optype);
 	void (*set_credits)(struct TCP_Server_Info *, const int);
 	int * (*get_credits_field)(struct TCP_Server_Info *, const int);
 	unsigned int (*get_credits)(struct mid_q_entry *);
 	__u64 (*get_next_mid)(struct TCP_Server_Info *);
+	void (*revert_current_mid)(struct TCP_Server_Info *server,
+				   const unsigned int val);
 	/* data offset from read response message */
 	unsigned int (*read_data_offset)(char *);
 	/*
@@ -345,7 +355,8 @@ struct smb_version_operations {
 			       struct cifs_sb_info *);
 	/* query symlink target */
 	int (*query_symlink)(const unsigned int, struct cifs_tcon *,
-			     const char *, char **, struct cifs_sb_info *);
+			     struct cifs_sb_info *, const char *,
+			     char **, bool);
 	/* open a file for non-posix mounts */
 	int (*open)(const unsigned int, struct cifs_open_parms *,
 		    __u32 *, FILE_ALL_INFO *);
@@ -383,8 +394,8 @@ struct smb_version_operations {
 			 struct cifs_fid *);
 	/* calculate a size of SMB message */
 	unsigned int (*calc_smb_size)(void *buf, struct TCP_Server_Info *ptcpi);
-	/* check for STATUS_PENDING and process it in a positive case */
-	bool (*is_status_pending)(char *, struct TCP_Server_Info *, int);
+	/* check for STATUS_PENDING and process the response if yes */
+	bool (*is_status_pending)(char *buf, struct TCP_Server_Info *server);
 	/* check for STATUS_NETWORK_SESSION_EXPIRED */
 	bool (*is_session_expired)(char *);
 	/* send oplock break response */
@@ -452,7 +463,11 @@ struct smb_version_operations {
 	unsigned int (*wp_retry_size)(struct inode *);
 	/* get mtu credits */
 	int (*wait_mtu_credits)(struct TCP_Server_Info *, unsigned int,
-				unsigned int *, unsigned int *);
+				unsigned int *, struct cifs_credits *);
+	/* adjust previously taken mtu credits to request size */
+	int (*adjust_credits)(struct TCP_Server_Info *server,
+			      struct cifs_credits *credits,
+			      const unsigned int payload_size);
 	/* check if we need to issue closedir */
 	bool (*dir_needs_close)(struct cifsFileInfo *);
 	long (*fallocate)(struct file *, struct cifs_tcon *, int, loff_t,
@@ -471,6 +486,19 @@ struct smb_version_operations {
 				struct cifs_tcon *tcon,
 				__le16 *path, int is_dir,
 				unsigned long p);
+	/* make unix special files (block, char, fifo, socket) */
+	int (*make_node)(unsigned int xid,
+			 struct inode *inode,
+			 struct dentry *dentry,
+			 struct cifs_tcon *tcon,
+			 char *full_path,
+			 umode_t mode,
+			 dev_t device_number);
+	/* version specific fiemap implementation */
+	int (*fiemap)(struct cifs_tcon *tcon, struct cifsFileInfo *,
+		      struct fiemap_extent_info *, u64, u64);
+	/* version specific llseek implementation */
+	loff_t (*llseek)(struct file *, struct cifs_tcon *, loff_t, int);
 };
 
 struct smb_version_values {
@@ -557,6 +585,7 @@ struct smb_vol {
 	bool resilient:1; /* noresilient not required since not fored for CA */
 	bool domainauto:1;
 	bool rdma:1;
+	unsigned int bsize;
 	unsigned int rsize;
 	unsigned int wsize;
 	bool sockopt_tcp_nodelay:1;
@@ -569,9 +598,14 @@ struct smb_vol {
 	struct nls_table *local_nls;
 	unsigned int echo_interval; /* echo interval in secs */
 	__u64 snapshot_time; /* needed for timewarp tokens */
+	__u32 handle_timeout; /* persistent and durable handle timeout in ms */
 	unsigned int max_credits; /* smb3 max_credits 10 < credits < 60000 */
 };
 
+/**
+ * CIFS superblock mount flags (mnt_cifs_flags) to consider when
+ * trying to reuse existing superblock for a new mount
+ */
 #define CIFS_MOUNT_MASK (CIFS_MOUNT_NO_PERM | CIFS_MOUNT_SET_UID | \
 			 CIFS_MOUNT_SERVER_INUM | CIFS_MOUNT_DIRECT_IO | \
 			 CIFS_MOUNT_NO_XATTR | CIFS_MOUNT_MAP_SPECIAL_CHR | \
@@ -582,8 +616,13 @@ struct smb_vol {
 			 CIFS_MOUNT_NOPOSIXBRL | CIFS_MOUNT_NOSSYNC | \
 			 CIFS_MOUNT_FSCACHE | CIFS_MOUNT_MF_SYMLINKS | \
 			 CIFS_MOUNT_MULTIUSER | CIFS_MOUNT_STRICT_IO | \
-			 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID)
+			 CIFS_MOUNT_CIFS_BACKUPUID | CIFS_MOUNT_CIFS_BACKUPGID | \
+			 CIFS_MOUNT_NO_DFS)
 
+/**
+ * Generic VFS superblock mount flags (s_flags) to consider when
+ * trying to reuse existing superblock for a new mount
+ */
 #define CIFS_MS_MASK (SB_RDONLY | SB_MANDLOCK | SB_NOEXEC | SB_NOSUID | \
 		      SB_NODEV | SB_SYNCHRONOUS)
 
@@ -690,10 +729,15 @@ struct TCP_Server_Info {
 #ifdef CONFIG_CIFS_STATS2
 	atomic_t in_send; /* requests trying to send */
 	atomic_t num_waiters;   /* blocked waiting to get in sendrecv */
+	atomic_t num_cmds[NUMBER_OF_SMB2_COMMANDS]; /* total requests by cmd */
 	atomic_t smb2slowcmd[NUMBER_OF_SMB2_COMMANDS]; /* count resps > 1 sec */
+	__u64 time_per_cmd[NUMBER_OF_SMB2_COMMANDS]; /* total time per cmd */
+	__u32 slowest_cmd[NUMBER_OF_SMB2_COMMANDS];
+	__u32 fastest_cmd[NUMBER_OF_SMB2_COMMANDS];
 #endif /* STATS2 */
 	unsigned int	max_read;
 	unsigned int	max_write;
+	__le16	compress_algorithm;
 	__le16	cipher_type;
 	 /* save initital negprot hash */
 	__u8	preauth_sha_hash[SMB2_PREAUTH_HASH_SIZE];
@@ -710,6 +754,11 @@ struct TCP_Server_Info {
 	int nr_targets;
 };
 
+struct cifs_credits {
+	unsigned int value;
+	unsigned int instance;
+};
+
 static inline unsigned int
 in_flight(struct TCP_Server_Info *server)
 {
@@ -721,28 +770,28 @@ in_flight(struct TCP_Server_Info *server)
 }
 
 static inline bool
-has_credits(struct TCP_Server_Info *server, int *credits)
+has_credits(struct TCP_Server_Info *server, int *credits, int num_credits)
 {
 	int num;
 	spin_lock(&server->req_lock);
 	num = *credits;
 	spin_unlock(&server->req_lock);
-	return num > 0;
+	return num >= num_credits;
 }
 
 static inline void
-add_credits(struct TCP_Server_Info *server, const unsigned int add,
+add_credits(struct TCP_Server_Info *server, const struct cifs_credits *credits,
 	    const int optype)
 {
-	server->ops->add_credits(server, add, optype);
+	server->ops->add_credits(server, credits, optype);
 }
 
 static inline void
-add_credits_and_wake_if(struct TCP_Server_Info *server, const unsigned int add,
-			const int optype)
+add_credits_and_wake_if(struct TCP_Server_Info *server,
+			const struct cifs_credits *credits, const int optype)
 {
-	if (add) {
-		server->ops->add_credits(server, add, optype);
+	if (credits->value) {
+		server->ops->add_credits(server, credits, optype);
 		wake_up(&server->request_q);
 	}
 }
@@ -753,6 +802,14 @@ set_credits(struct TCP_Server_Info *server, const int val)
 	server->ops->set_credits(server, val);
 }
 
+static inline int
+adjust_credits(struct TCP_Server_Info *server, struct cifs_credits *credits,
+	       const unsigned int payload_size)
+{
+	return server->ops->adjust_credits ?
+		server->ops->adjust_credits(server, credits, payload_size) : 0;
+}
+
 static inline __le64
 get_next_mid64(struct TCP_Server_Info *server)
 {
@@ -770,6 +827,22 @@ get_next_mid(struct TCP_Server_Info *server)
 	return cpu_to_le16(mid);
 }
 
+static inline void
+revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
+{
+	if (server->ops->revert_current_mid)
+		server->ops->revert_current_mid(server, val);
+}
+
+static inline void
+revert_current_mid_from_hdr(struct TCP_Server_Info *server,
+			    const struct smb2_sync_hdr *shdr)
+{
+	unsigned int num = le16_to_cpu(shdr->CreditCharge);
+
+	return revert_current_mid(server, num > 0 ? num : 1);
+}
+
 static inline __u16
 get_mid(const struct smb_hdr *smb)
 {
@@ -924,11 +997,14 @@ cap_unix(struct cifs_ses *ses)
 
 struct cached_fid {
 	bool is_valid:1;	/* Do we have a useable root fid */
+	bool file_all_info_is_valid:1;
+
 	struct kref refcount;
 	struct cifs_fid *fid;
 	struct mutex fid_mutex;
 	struct cifs_tcon *tcon;
 	struct work_struct lease_break;
+	struct smb2_file_all_info file_all_info;
 };
 
 /*
@@ -1009,6 +1085,7 @@ struct cifs_tcon {
 	__u32 vol_serial_number;
 	__le64 vol_create_time;
 	__u64 snapshot_time; /* for timewarp tokens - timestamp of snapshot */
+	__u32 handle_timeout; /* persistent and durable handle timeout in ms */
 	__u32 ss_flags;		/* sector size flags */
 	__u32 perf_sector_size; /* best sector size for perf */
 	__u32 max_chunks;
@@ -1234,7 +1311,7 @@ struct cifs_readdata {
 	unsigned int			pagesz;
 	unsigned int			page_offset;
 	unsigned int			tailsz;
-	unsigned int			credits;
+	struct cifs_credits		credits;
 	unsigned int			nr_pages;
 	struct page			**pages;
 };
@@ -1260,7 +1337,7 @@ struct cifs_writedata {
 	unsigned int			pagesz;
 	unsigned int			page_offset;
 	unsigned int			tailsz;
-	unsigned int			credits;
+	struct cifs_credits		credits;
 	unsigned int			nr_pages;
 	struct page			**pages;
 };
@@ -1276,6 +1353,7 @@ cifsFileInfo_get_locked(struct cifsFileInfo *cifs_file)
 }
 
 struct cifsFileInfo *cifsFileInfo_get(struct cifsFileInfo *cifs_file);
+void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_hdlr);
 void cifsFileInfo_put(struct cifsFileInfo *cifs_file);
 
 #define CIFS_CACHE_READ_FLG	1
@@ -1299,6 +1377,7 @@ struct cifsInodeInfo {
 	struct rw_semaphore lock_sem;	/* protect the fields above */
 	/* BB add in lists for dirty pages i.e. write caching info for oplock */
 	struct list_head openFileList;
+	spinlock_t	open_file_lock;	/* protects openFileList */
 	__u32 cifsAttrs; /* e.g. DOS archive bit, sparse, compressed, system */
 	unsigned int oplock;		/* oplock/lease level we have */
 	unsigned int epoch;		/* used to track lease state changes */
@@ -1422,6 +1501,7 @@ struct mid_q_entry {
 	struct kref refcount;
 	struct TCP_Server_Info *server;	/* server corresponding to this mid */
 	__u64 mid;		/* multiplex id */
+	__u16 credits;		/* number of credits consumed by this mid */
 	__u32 pid;		/* process id */
 	__u32 sequence_number;  /* for CIFS signing */
 	unsigned long when_alloc;  /* when mid was created */
@@ -1614,11 +1694,11 @@ static inline bool is_retryable_error(int error)
 
 /* Type of Request to SendReceive2 */
 #define   CIFS_BLOCKING_OP      1    /* operation can block */
-#define   CIFS_ASYNC_OP         2    /* do not wait for response */
+#define   CIFS_NON_BLOCKING     2    /* do not block waiting for credits */
 #define   CIFS_TIMEOUT_MASK 0x003    /* only one of above set in req */
 #define   CIFS_LOG_ERROR    0x010    /* log NT STATUS if non-zero */
 #define   CIFS_LARGE_BUF_OP 0x020    /* large request buffer */
-#define   CIFS_NO_RESP      0x040    /* no response buffer required */
+#define   CIFS_NO_RSP_BUF   0x040    /* no response buffer required */
 
 /* Type of request operation */
 #define   CIFS_ECHO_OP      0x080    /* echo request */
@@ -1628,6 +1708,7 @@ static inline bool is_retryable_error(int error)
 
 #define   CIFS_HAS_CREDITS 0x0400    /* already has credits */
 #define   CIFS_TRANSFORM_REQ 0x0800    /* transform request before sending */
+#define   CIFS_NO_SRV_RSP    0x1000    /* there is no server response */
 
 /* Security Flags: indicate type of session setup needed */
 #define   CIFSSEC_MAY_SIGN	0x00001
@@ -1696,13 +1777,18 @@ require use of the stronger protocol */
  *  GlobalMid_Lock protects:
  *	list operations on pending_mid_q and oplockQ
  *      updates to XID counters, multiplex id  and SMB sequence numbers
+ *      list operations on global DnotifyReqList
  *  tcp_ses_lock protects:
  *	list operations on tcp and SMB session lists
  *  tcon->open_file_lock protects the list of open files hanging off the tcon
+ *  inode->open_file_lock protects the openFileList hanging off the inode
  *  cfile->file_info_lock protects counters and fields in cifs file struct
  *  f_owner.lock protects certain per file struct operations
  *  mapping->page_lock protects certain per page operations
  *
+ *  Note that the cifs_tcon.open_file_lock should be taken before
+ *  not after the cifsInodeInfo.open_file_lock
+ *
  *  Semaphores
  *  ----------
  *  sesSem     operations on smb session
@@ -1796,6 +1882,7 @@ GLOBAL_EXTERN spinlock_t gidsidlock;
 #endif /* CONFIG_CIFS_ACL */
 
 void cifs_oplock_break(struct work_struct *work);
+void cifs_queue_oplock_break(struct cifsFileInfo *cfile);
 
 extern const struct slow_work_ops cifs_oplock_break_ops;
 extern struct workqueue_struct *cifsiod_wq;
diff --git a/fs/cifs/cifsproto.h b/fs/cifs/cifsproto.h
index 336c116995d7..e23234207fc2 100644
--- a/fs/cifs/cifsproto.h
+++ b/fs/cifs/cifsproto.h
@@ -93,7 +93,8 @@ extern int cifs_discard_remaining_data(struct TCP_Server_Info *server);
 extern int cifs_call_async(struct TCP_Server_Info *server,
 			struct smb_rqst *rqst,
 			mid_receive_t *receive, mid_callback_t *callback,
-			mid_handle_t *handle, void *cbdata, const int flags);
+			mid_handle_t *handle, void *cbdata, const int flags,
+			const struct cifs_credits *exist_credits);
 extern int cifs_send_recv(const unsigned int xid, struct cifs_ses *ses,
 			  struct smb_rqst *rqst, int *resp_buf_type,
 			  const int flags, struct kvec *resp_iov);
@@ -115,7 +116,7 @@ extern int cifs_check_receive(struct mid_q_entry *mid,
 			struct TCP_Server_Info *server, bool log_error);
 extern int cifs_wait_mtu_credits(struct TCP_Server_Info *server,
 				 unsigned int size, unsigned int *num,
-				 unsigned int *credits);
+				 struct cifs_credits *credits);
 extern int SendReceive2(const unsigned int /* xid */ , struct cifs_ses *,
 			struct kvec *, int /* nvec to send */,
 			int * /* type of buf returned */, const int flags,
@@ -133,6 +134,9 @@ extern bool is_size_safe_to_change(struct cifsInodeInfo *, __u64 eof);
 extern void cifs_update_eof(struct cifsInodeInfo *cifsi, loff_t offset,
 			    unsigned int bytes_written);
 extern struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *, bool);
+extern int cifs_get_writable_file(struct cifsInodeInfo *cifs_inode,
+				  bool fsuid_only,
+				  struct cifsFileInfo **ret_file);
 extern struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *, bool);
 extern unsigned int smbCalcSize(void *buf, struct TCP_Server_Info *server);
 extern int decode_negTokenInit(unsigned char *security_blob, int length,
@@ -522,12 +526,21 @@ extern int E_md4hash(const unsigned char *passwd, unsigned char *p16,
 			const struct nls_table *codepage);
 extern int SMBencrypt(unsigned char *passwd, const unsigned char *c8,
 			unsigned char *p24);
+
+extern int
+cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
+		       const char *devname, bool is_smb3);
 extern void
 cifs_cleanup_volume_info_contents(struct smb_vol *volume_info);
 
 extern struct TCP_Server_Info *
 cifs_find_tcp_session(struct smb_vol *vol);
 
+extern void cifs_put_smb_ses(struct cifs_ses *ses);
+
+extern struct cifs_ses *
+cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info);
+
 void cifs_readdata_release(struct kref *refcount);
 int cifs_async_readv(struct cifs_readdata *rdata);
 int cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid);
diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c
index bb54ccf8481c..1fbd92843a73 100644
--- a/fs/cifs/cifssmb.c
+++ b/fs/cifs/cifssmb.c
@@ -139,8 +139,8 @@ static int __cifs_reconnect_tcon(const struct nls_table *nlsc,
 		return -ENOMEM;
 
 	if (tcon->ipc) {
-		snprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$",
-			 tcon->ses->server->hostname);
+		scnprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$",
+			  tcon->ses->server->hostname);
 		rc = CIFSTCon(0, tcon->ses, tree, tcon, nlsc);
 		goto out;
 	}
@@ -172,7 +172,7 @@ static int __cifs_reconnect_tcon(const struct nls_table *nlsc,
 			continue;
 		}
 
-		snprintf(tree, MAX_TREE_SIZE, "\\%s", tgt);
+		scnprintf(tree, MAX_TREE_SIZE, "\\%s", tgt);
 
 		rc = CIFSTCon(0, tcon->ses, tree, tcon, nlsc);
 		if (!rc)
@@ -822,9 +822,10 @@ static void
 cifs_echo_callback(struct mid_q_entry *mid)
 {
 	struct TCP_Server_Info *server = mid->callback_data;
+	struct cifs_credits credits = { .value = 1, .instance = 0 };
 
 	DeleteMidQEntry(mid);
-	add_credits(server, 1, CIFS_ECHO_OP);
+	add_credits(server, &credits, CIFS_ECHO_OP);
 }
 
 int
@@ -859,7 +860,7 @@ CIFSSMBEcho(struct TCP_Server_Info *server)
 	iov[1].iov_base = (char *)smb + 4;
 
 	rc = cifs_call_async(server, &rqst, NULL, cifs_echo_callback, NULL,
-			     server, CIFS_ASYNC_OP | CIFS_ECHO_OP);
+			     server, CIFS_NON_BLOCKING | CIFS_ECHO_OP, NULL);
 	if (rc)
 		cifs_dbg(FYI, "Echo request failed: %d\n", rc);
 
@@ -1605,16 +1606,17 @@ cifs_readv_receive(struct TCP_Server_Info *server, struct mid_q_entry *mid)
 	}
 
 	if (server->ops->is_status_pending &&
-	    server->ops->is_status_pending(buf, server, 0)) {
+	    server->ops->is_status_pending(buf, server)) {
 		cifs_discard_remaining_data(server);
 		return -1;
 	}
 
 	/* set up first two iov for signature check and to get credits */
 	rdata->iov[0].iov_base = buf;
-	rdata->iov[0].iov_len = 4;
-	rdata->iov[1].iov_base = buf + 4;
-	rdata->iov[1].iov_len = server->total_read - 4;
+	rdata->iov[0].iov_len = server->vals->header_preamble_size;
+	rdata->iov[1].iov_base = buf + server->vals->header_preamble_size;
+	rdata->iov[1].iov_len =
+		server->total_read - server->vals->header_preamble_size;
 	cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
 		 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
 	cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
@@ -1713,6 +1715,7 @@ cifs_readv_callback(struct mid_q_entry *mid)
 				 .rq_npages = rdata->nr_pages,
 				 .rq_pagesz = rdata->pagesz,
 				 .rq_tailsz = rdata->tailsz };
+	struct cifs_credits credits = { .value = 1, .instance = 0 };
 
 	cifs_dbg(FYI, "%s: mid=%llu state=%d result=%d bytes=%u\n",
 		 __func__, mid->mid, mid->mid_state, rdata->result,
@@ -1750,7 +1753,7 @@ cifs_readv_callback(struct mid_q_entry *mid)
 
 	queue_work(cifsiod_wq, &rdata->work);
 	DeleteMidQEntry(mid);
-	add_credits(server, 1, 0);
+	add_credits(server, &credits, 0);
 }
 
 /* cifs_async_readv - send an async write, and set up mid to handle result */
@@ -1809,7 +1812,7 @@ cifs_async_readv(struct cifs_readdata *rdata)
 
 	kref_get(&rdata->refcount);
 	rc = cifs_call_async(tcon->ses->server, &rqst, cifs_readv_receive,
-			     cifs_readv_callback, NULL, rdata, 0);
+			     cifs_readv_callback, NULL, rdata, 0, NULL);
 
 	if (rc == 0)
 		cifs_stats_inc(&tcon->stats.cifs_stats.num_reads);
@@ -2123,14 +2126,18 @@ cifs_writev_requeue(struct cifs_writedata *wdata)
 		wdata2->tailsz = tailsz;
 		wdata2->bytes = cur_len;
 
-		wdata2->cfile = find_writable_file(CIFS_I(inode), false);
+		rc = cifs_get_writable_file(CIFS_I(inode), false,
+					    &wdata2->cfile);
 		if (!wdata2->cfile) {
-			cifs_dbg(VFS, "No writable handles for inode\n");
-			rc = -EBADF;
-			break;
+			cifs_dbg(VFS, "No writable handle to retry writepages rc=%d\n",
+				 rc);
+			if (!is_retryable_error(rc))
+				rc = -EBADF;
+		} else {
+			wdata2->pid = wdata2->cfile->pid;
+			rc = server->ops->async_writev(wdata2,
+						       cifs_writedata_release);
 		}
-		wdata2->pid = wdata2->cfile->pid;
-		rc = server->ops->async_writev(wdata2, cifs_writedata_release);
 
 		for (j = 0; j < nr_pages; j++) {
 			unlock_page(wdata2->pages[j]);
@@ -2145,6 +2152,7 @@ cifs_writev_requeue(struct cifs_writedata *wdata)
 			kref_put(&wdata2->refcount, cifs_writedata_release);
 			if (is_retryable_error(rc))
 				continue;
+			i += nr_pages;
 			break;
 		}
 
@@ -2152,6 +2160,13 @@ cifs_writev_requeue(struct cifs_writedata *wdata)
 		i += nr_pages;
 	} while (i < wdata->nr_pages);
 
+	/* cleanup remaining pages from the original wdata */
+	for (; i < wdata->nr_pages; i++) {
+		SetPageError(wdata->pages[i]);
+		end_page_writeback(wdata->pages[i]);
+		put_page(wdata->pages[i]);
+	}
+
 	if (rc != 0 && !is_retryable_error(rc))
 		mapping_set_error(inode->i_mapping, rc);
 	kref_put(&wdata->refcount, cifs_writedata_release);
@@ -2226,6 +2241,7 @@ cifs_writev_callback(struct mid_q_entry *mid)
 	struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
 	unsigned int written;
 	WRITE_RSP *smb = (WRITE_RSP *)mid->resp_buf;
+	struct cifs_credits credits = { .value = 1, .instance = 0 };
 
 	switch (mid->mid_state) {
 	case MID_RESPONSE_RECEIVED:
@@ -2261,7 +2277,7 @@ cifs_writev_callback(struct mid_q_entry *mid)
 
 	queue_work(cifsiod_wq, &wdata->work);
 	DeleteMidQEntry(mid);
-	add_credits(tcon->ses->server, 1, 0);
+	add_credits(tcon->ses->server, &credits, 0);
 }
 
 /* cifs_async_writev - send an async write, and set up mid to handle result */
@@ -2339,7 +2355,7 @@ cifs_async_writev(struct cifs_writedata *wdata,
 
 	kref_get(&wdata->refcount);
 	rc = cifs_call_async(tcon->ses->server, &rqst, NULL,
-				cifs_writev_callback, NULL, wdata, 0);
+			     cifs_writev_callback, NULL, wdata, 0, NULL);
 
 	if (rc == 0)
 		cifs_stats_inc(&tcon->stats.cifs_stats.num_writes);
@@ -2492,8 +2508,8 @@ int cifs_lockv(const unsigned int xid, struct cifs_tcon *tcon,
 	iov[1].iov_len = (num_unlock + num_lock) * sizeof(LOCKING_ANDX_RANGE);
 
 	cifs_stats_inc(&tcon->stats.cifs_stats.num_locks);
-	rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type, CIFS_NO_RESP,
-			  &rsp_iov);
+	rc = SendReceive2(xid, tcon->ses, iov, 2, &resp_buf_type,
+			  CIFS_NO_RSP_BUF, &rsp_iov);
 	cifs_small_buf_release(pSMB);
 	if (rc)
 		cifs_dbg(FYI, "Send error in cifs_lockv = %d\n", rc);
@@ -2524,7 +2540,7 @@ CIFSSMBLock(const unsigned int xid, struct cifs_tcon *tcon,
 
 	if (lockType == LOCKING_ANDX_OPLOCK_RELEASE) {
 		/* no response expected */
-		flags = CIFS_ASYNC_OP | CIFS_OBREAK_OP;
+		flags = CIFS_NO_SRV_RSP | CIFS_NON_BLOCKING | CIFS_OBREAK_OP;
 		pSMB->Timeout = 0;
 	} else if (waitFlag) {
 		flags = CIFS_BLOCKING_OP; /* blocking operation, no timeout */
@@ -6551,93 +6567,3 @@ SetEARetry:
 	return rc;
 }
 #endif
-
-#ifdef CONFIG_CIFS_DNOTIFY_EXPERIMENTAL /* BB unused temporarily */
-/*
- *	Years ago the kernel added a "dnotify" function for Samba server,
- *	to allow network clients (such as Windows) to display updated
- *	lists of files in directory listings automatically when
- *	files are added by one user when another user has the
- *	same directory open on their desktop.  The Linux cifs kernel
- *	client hooked into the kernel side of this interface for
- *	the same reason, but ironically when the VFS moved from
- *	"dnotify" to "inotify" it became harder to plug in Linux
- *	network file system clients (the most obvious use case
- *	for notify interfaces is when multiple users can update
- *	the contents of the same directory - exactly what network
- *	file systems can do) although the server (Samba) could
- *	still use it.  For the short term we leave the worker
- *	function ifdeffed out (below) until inotify is fixed
- *	in the VFS to make it easier to plug in network file
- *	system clients.  If inotify turns out to be permanently
- *	incompatible for network fs clients, we could instead simply
- *	expose this config flag by adding a future cifs (and smb2) notify ioctl.
- */
-int CIFSSMBNotify(const unsigned int xid, struct cifs_tcon *tcon,
-		  const int notify_subdirs, const __u16 netfid,
-		  __u32 filter, struct file *pfile, int multishot,
-		  const struct nls_table *nls_codepage)
-{
-	int rc = 0;
-	struct smb_com_transaction_change_notify_req *pSMB = NULL;
-	struct smb_com_ntransaction_change_notify_rsp *pSMBr = NULL;
-	struct dir_notify_req *dnotify_req;
-	int bytes_returned;
-
-	cifs_dbg(FYI, "In CIFSSMBNotify for file handle %d\n", (int)netfid);
-	rc = smb_init(SMB_COM_NT_TRANSACT, 23, tcon, (void **) &pSMB,
-		      (void **) &pSMBr);
-	if (rc)
-		return rc;
-
-	pSMB->TotalParameterCount = 0 ;
-	pSMB->TotalDataCount = 0;
-	pSMB->MaxParameterCount = cpu_to_le32(2);
-	pSMB->MaxDataCount = cpu_to_le32(CIFSMaxBufSize & 0xFFFFFF00);
-	pSMB->MaxSetupCount = 4;
-	pSMB->Reserved = 0;
-	pSMB->ParameterOffset = 0;
-	pSMB->DataCount = 0;
-	pSMB->DataOffset = 0;
-	pSMB->SetupCount = 4; /* single byte does not need le conversion */
-	pSMB->SubCommand = cpu_to_le16(NT_TRANSACT_NOTIFY_CHANGE);
-	pSMB->ParameterCount = pSMB->TotalParameterCount;
-	if (notify_subdirs)
-		pSMB->WatchTree = 1; /* one byte - no le conversion needed */
-	pSMB->Reserved2 = 0;
-	pSMB->CompletionFilter = cpu_to_le32(filter);
-	pSMB->Fid = netfid; /* file handle always le */
-	pSMB->ByteCount = 0;
-
-	rc = SendReceive(xid, tcon->ses, (struct smb_hdr *) pSMB,
-			 (struct smb_hdr *)pSMBr, &bytes_returned,
-			 CIFS_ASYNC_OP);
-	if (rc) {
-		cifs_dbg(FYI, "Error in Notify = %d\n", rc);
-	} else {
-		/* Add file to outstanding requests */
-		/* BB change to kmem cache alloc */
-		dnotify_req = kmalloc(
-						sizeof(struct dir_notify_req),
-						 GFP_KERNEL);
-		if (dnotify_req) {
-			dnotify_req->Pid = pSMB->hdr.Pid;
-			dnotify_req->PidHigh = pSMB->hdr.PidHigh;
-			dnotify_req->Mid = pSMB->hdr.Mid;
-			dnotify_req->Tid = pSMB->hdr.Tid;
-			dnotify_req->Uid = pSMB->hdr.Uid;
-			dnotify_req->netfid = netfid;
-			dnotify_req->pfile = pfile;
-			dnotify_req->filter = filter;
-			dnotify_req->multishot = multishot;
-			spin_lock(&GlobalMid_Lock);
-			list_add_tail(&dnotify_req->lhead,
-					&GlobalDnotifyReqList);
-			spin_unlock(&GlobalMid_Lock);
-		} else
-			rc = -ENOMEM;
-	}
-	cifs_buf_release(pSMB);
-	return rc;
-}
-#endif /* was needed for dnotify, and will be needed for inotify when VFS fix */
diff --git a/fs/cifs/connect.c b/fs/cifs/connect.c
index 8463c940e0e5..714a359c7c8d 100644
--- a/fs/cifs/connect.c
+++ b/fs/cifs/connect.c
@@ -102,8 +102,8 @@ enum {
 	Opt_backupuid, Opt_backupgid, Opt_uid,
 	Opt_cruid, Opt_gid, Opt_file_mode,
 	Opt_dirmode, Opt_port,
-	Opt_rsize, Opt_wsize, Opt_actimeo,
-	Opt_echo_interval, Opt_max_credits,
+	Opt_blocksize, Opt_rsize, Opt_wsize, Opt_actimeo,
+	Opt_echo_interval, Opt_max_credits, Opt_handletimeout,
 	Opt_snapshot,
 
 	/* Mount options which take string value */
@@ -204,9 +204,11 @@ static const match_table_t cifs_mount_option_tokens = {
 	{ Opt_dirmode, "dirmode=%s" },
 	{ Opt_dirmode, "dir_mode=%s" },
 	{ Opt_port, "port=%s" },
+	{ Opt_blocksize, "bsize=%s" },
 	{ Opt_rsize, "rsize=%s" },
 	{ Opt_wsize, "wsize=%s" },
 	{ Opt_actimeo, "actimeo=%s" },
+	{ Opt_handletimeout, "handletimeout=%s" },
 	{ Opt_echo_interval, "echo_interval=%s" },
 	{ Opt_max_credits, "max_credits=%s" },
 	{ Opt_snapshot, "snapshot=%s" },
@@ -321,8 +323,6 @@ static int ip_connect(struct TCP_Server_Info *server);
 static int generic_ip_connect(struct TCP_Server_Info *server);
 static void tlink_rb_insert(struct rb_root *root, struct tcon_link *new_tlink);
 static void cifs_prune_tlinks(struct work_struct *work);
-static int cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
-					const char *devname, bool is_smb3);
 static char *extract_hostname(const char *unc);
 
 /*
@@ -348,7 +348,7 @@ static int reconn_set_ipaddr(struct TCP_Server_Info *server)
 		cifs_dbg(FYI, "%s: failed to create UNC path\n", __func__);
 		return -ENOMEM;
 	}
-	snprintf(unc, len, "\\\\%s", server->hostname);
+	scnprintf(unc, len, "\\\\%s", server->hostname);
 
 	rc = dns_resolve_server_name_to_ip(unc, &ipaddr);
 	kfree(unc);
@@ -476,6 +476,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 	spin_lock(&GlobalMid_Lock);
 	server->nr_targets = 1;
 #ifdef CONFIG_CIFS_DFS_UPCALL
+	spin_unlock(&GlobalMid_Lock);
 	cifs_sb = find_super_by_tcp(server);
 	if (IS_ERR(cifs_sb)) {
 		rc = PTR_ERR(cifs_sb);
@@ -493,6 +494,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 	}
 	cifs_dbg(FYI, "%s: will retry %d target(s)\n", __func__,
 		 server->nr_targets);
+	spin_lock(&GlobalMid_Lock);
 #endif
 	if (server->tcpStatus == CifsExiting) {
 		/* the demux thread will exit normally
@@ -564,6 +566,12 @@ cifs_reconnect(struct TCP_Server_Info *server)
 		mid_entry->callback(mid_entry);
 	}
 
+	if (cifs_rdma_enabled(server)) {
+		mutex_lock(&server->srv_mutex);
+		smbd_destroy(server);
+		mutex_unlock(&server->srv_mutex);
+	}
+
 	do {
 		try_to_freeze();
 
@@ -592,6 +600,7 @@ cifs_reconnect(struct TCP_Server_Info *server)
 			msleep(3000);
 		} else {
 			atomic_inc(&tcpSesReconnectCount);
+			set_credits(server, 1);
 			spin_lock(&GlobalMid_Lock);
 			if (server->tcpStatus != CifsExiting)
 				server->tcpStatus = CifsNeedNegotiate;
@@ -928,10 +937,8 @@ static void clean_demultiplex_info(struct TCP_Server_Info *server)
 	wake_up_all(&server->request_q);
 	/* give those requests time to exit */
 	msleep(125);
-	if (cifs_rdma_enabled(server) && server->smbd_conn) {
-		smbd_destroy(server->smbd_conn);
-		server->smbd_conn = NULL;
-	}
+	if (cifs_rdma_enabled(server))
+		smbd_destroy(server);
 	if (server->ssocket) {
 		sock_release(server->ssocket);
 		server->ssocket = NULL;
@@ -1053,7 +1060,7 @@ cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
 	}
 
 	if (server->ops->is_status_pending &&
-	    server->ops->is_status_pending(buf, server, length))
+	    server->ops->is_status_pending(buf, server))
 		return -1;
 
 	if (!mid)
@@ -1063,6 +1070,26 @@ cifs_handle_standard(struct TCP_Server_Info *server, struct mid_q_entry *mid)
 	return 0;
 }
 
+static void
+smb2_add_credits_from_hdr(char *buffer, struct TCP_Server_Info *server)
+{
+	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buffer;
+
+	/*
+	 * SMB1 does not use credits.
+	 */
+	if (server->vals->header_preamble_size)
+		return;
+
+	if (shdr->CreditRequest) {
+		spin_lock(&server->req_lock);
+		server->credits += le16_to_cpu(shdr->CreditRequest);
+		spin_unlock(&server->req_lock);
+		wake_up(&server->request_q);
+	}
+}
+
+
 static int
 cifs_demultiplex_thread(void *p)
 {
@@ -1169,10 +1196,6 @@ next_pdu:
 			continue;
 		}
 
-		if (server->large_buf)
-			buf = server->bigbuf;
-
-
 		server->lstrp = jiffies;
 
 		for (i = 0; i < num_mids; i++) {
@@ -1192,6 +1215,7 @@ next_pdu:
 			} else if (server->ops->is_oplock_break &&
 				   server->ops->is_oplock_break(bufs[i],
 								server)) {
+				smb2_add_credits_from_hdr(bufs[i], server);
 				cifs_dbg(FYI, "Received oplock break\n");
 			} else {
 				cifs_dbg(VFS, "No task to wake, unknown frame "
@@ -1203,6 +1227,7 @@ next_pdu:
 				if (server->ops->dump_detail)
 					server->ops->dump_detail(bufs[i],
 								 server);
+				smb2_add_credits_from_hdr(bufs[i], server);
 				cifs_dump_mids(server);
 #endif /* CIFS_DEBUG2 */
 			}
@@ -1486,6 +1511,11 @@ cifs_parse_devname(const char *devname, struct smb_vol *vol)
 	const char *delims = "/\\";
 	size_t len;
 
+	if (unlikely(!devname || !*devname)) {
+		cifs_dbg(VFS, "Device name not specified.\n");
+		return -EINVAL;
+	}
+
 	/* make sure we have a valid UNC double delimiter prefix */
 	len = strspn(devname, delims);
 	if (len != 2)
@@ -1571,7 +1601,7 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
 	vol->cred_uid = current_uid();
 	vol->linux_uid = current_uid();
 	vol->linux_gid = current_gid();
-
+	vol->bsize = 1024 * 1024; /* can improve cp performance significantly */
 	/*
 	 * default to SFM style remapping of seven reserved characters
 	 * unless user overrides it or we negotiate CIFS POSIX where
@@ -1594,6 +1624,9 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
 
 	vol->actimeo = CIFS_DEF_ACTIMEO;
 
+	/* Most clients set timeout to 0, allows server to use its default */
+	vol->handle_timeout = 0; /* See MS-SMB2 spec section 2.2.14.2.12 */
+
 	/* offer SMB2.1 and later (SMB3 etc). Secure and widely accepted */
 	vol->ops = &smb30_operations;
 	vol->vals = &smbdefault_values;
@@ -1944,6 +1977,26 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
 			}
 			port = (unsigned short)option;
 			break;
+		case Opt_blocksize:
+			if (get_option_ul(args, &option)) {
+				cifs_dbg(VFS, "%s: Invalid blocksize value\n",
+					__func__);
+				goto cifs_parse_mount_err;
+			}
+			/*
+			 * inode blocksize realistically should never need to be
+			 * less than 16K or greater than 16M and default is 1MB.
+			 * Note that small inode block sizes (e.g. 64K) can lead
+			 * to very poor performance of common tools like cp and scp
+			 */
+			if ((option < CIFS_MAX_MSGSIZE) ||
+			   (option > (4 * SMB3_DEFAULT_IOSIZE))) {
+				cifs_dbg(VFS, "%s: Invalid blocksize\n",
+					__func__);
+				goto cifs_parse_mount_err;
+			}
+			vol->bsize = option;
+			break;
 		case Opt_rsize:
 			if (get_option_ul(args, &option)) {
 				cifs_dbg(VFS, "%s: Invalid rsize value\n",
@@ -1972,6 +2025,18 @@ cifs_parse_mount_options(const char *mountdata, const char *devname,
 				goto cifs_parse_mount_err;
 			}
 			break;
+		case Opt_handletimeout:
+			if (get_option_ul(args, &option)) {
+				cifs_dbg(VFS, "%s: Invalid handletimeout value\n",
+					 __func__);
+				goto cifs_parse_mount_err;
+			}
+			vol->handle_timeout = option;
+			if (vol->handle_timeout > SMB3_MAX_HANDLE_TIMEOUT) {
+				cifs_dbg(VFS, "Invalid handle cache timeout, longer than 16 minutes\n");
+				goto cifs_parse_mount_err;
+			}
+			break;
 		case Opt_echo_interval:
 			if (get_option_ul(args, &option)) {
 				cifs_dbg(VFS, "%s: Invalid echo interval value\n",
@@ -2383,6 +2448,10 @@ match_port(struct TCP_Server_Info *server, struct sockaddr *addr)
 {
 	__be16 port, *sport;
 
+	/* SMBDirect manages its own ports, don't match it here */
+	if (server->rdma)
+		return true;
+
 	switch (addr->sa_family) {
 	case AF_INET:
 		sport = &((struct sockaddr_in *) &server->dstaddr)->sin_port;
@@ -2562,7 +2631,7 @@ cifs_put_tcp_session(struct TCP_Server_Info *server, int from_reconnect)
 
 	task = xchg(&server->tsk, NULL);
 	if (task)
-		force_sig(SIGKILL, task);
+		send_sig(SIGKILL, task, 1);
 }
 
 static struct TCP_Server_Info *
@@ -2609,7 +2678,7 @@ cifs_get_tcp_session(struct smb_vol *volume_info)
 		volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL);
 	tcp_ses->session_estab = false;
 	tcp_ses->sequence_number = 0;
-	tcp_ses->reconnect_instance = 0;
+	tcp_ses->reconnect_instance = 1;
 	tcp_ses->lstrp = jiffies;
 	spin_lock_init(&tcp_ses->req_lock);
 	INIT_LIST_HEAD(&tcp_ses->tcp_ses_list);
@@ -2770,7 +2839,7 @@ cifs_setup_ipc(struct cifs_ses *ses, struct smb_vol *volume_info)
 	if (tcon == NULL)
 		return -ENOMEM;
 
-	snprintf(unc, sizeof(unc), "\\\\%s\\IPC$", ses->server->hostname);
+	scnprintf(unc, sizeof(unc), "\\\\%s\\IPC$", ses->server->hostname);
 
 	/* cannot fail */
 	nls_codepage = load_nls_default();
@@ -2843,8 +2912,7 @@ cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol)
 	return NULL;
 }
 
-static void
-cifs_put_smb_ses(struct cifs_ses *ses)
+void cifs_put_smb_ses(struct cifs_ses *ses)
 {
 	unsigned int rc, xid;
 	struct TCP_Server_Info *server = ses->server;
@@ -3021,7 +3089,7 @@ cifs_set_cifscreds(struct smb_vol *vol __attribute__((unused)),
  * already got a server reference (server refcount +1). See
  * cifs_get_tcon() for refcount explanations.
  */
-static struct cifs_ses *
+struct cifs_ses *
 cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info)
 {
 	int rc = -ENOMEM;
@@ -3138,6 +3206,8 @@ static int match_tcon(struct cifs_tcon *tcon, struct smb_vol *volume_info)
 		return 0;
 	if (tcon->snapshot_time != volume_info->snapshot_time)
 		return 0;
+	if (tcon->handle_timeout != volume_info->handle_timeout)
+		return 0;
 	return 1;
 }
 
@@ -3252,6 +3322,16 @@ cifs_get_tcon(struct cifs_ses *ses, struct smb_vol *volume_info)
 			tcon->snapshot_time = volume_info->snapshot_time;
 	}
 
+	if (volume_info->handle_timeout) {
+		if (ses->server->vals->protocol_id == 0) {
+			cifs_dbg(VFS,
+			     "Use SMB2.1 or later for handle timeout option\n");
+			rc = -EOPNOTSUPP;
+			goto out_fail;
+		} else
+			tcon->handle_timeout = volume_info->handle_timeout;
+	}
+
 	tcon->ses = ses;
 	if (volume_info->password) {
 		tcon->password = kstrdup(volume_info->password, GFP_KERNEL);
@@ -3839,6 +3919,7 @@ int cifs_setup_cifs_sb(struct smb_vol *pvolume_info,
 	spin_lock_init(&cifs_sb->tlink_tree_lock);
 	cifs_sb->tlink_tree = RB_ROOT;
 
+	cifs_sb->bsize = pvolume_info->bsize;
 	/*
 	 * Temporarily set r/wsize for matching superblock. If we end up using
 	 * new sb then client will later negotiate it downward if needed.
@@ -4198,7 +4279,7 @@ static int update_vol_info(const struct dfs_cache_tgt_iterator *tgt_it,
 	new_unc = kmalloc(len, GFP_KERNEL);
 	if (!new_unc)
 		return -ENOMEM;
-	snprintf(new_unc, len, "\\%s", tgt);
+	scnprintf(new_unc, len, "\\%s", tgt);
 
 	kfree(vol->UNC);
 	vol->UNC = new_unc;
@@ -4315,7 +4396,7 @@ static int mount_do_dfs_failover(const char *path,
 }
 #endif
 
-static int
+int
 cifs_setup_volume_info(struct smb_vol *volume_info, char *mount_data,
 			const char *devname, bool is_smb3)
 {
@@ -4469,7 +4550,7 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol)
 	struct cifs_tcon *tcon = NULL;
 	struct TCP_Server_Info *server;
 	char *root_path = NULL, *full_path = NULL;
-	char *old_mountdata;
+	char *old_mountdata, *origin_mountdata = NULL;
 	int count;
 
 	rc = mount_get_conns(vol, cifs_sb, &xid, &server, &ses, &tcon);
@@ -4528,6 +4609,14 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol)
 		goto error;
 	}
 
+	/* Save DFS root volume information for DFS refresh worker */
+	origin_mountdata = kstrndup(cifs_sb->mountdata,
+				    strlen(cifs_sb->mountdata), GFP_KERNEL);
+	if (!origin_mountdata) {
+		rc = -ENOMEM;
+		goto error;
+	}
+
 	if (cifs_sb->mountdata != old_mountdata) {
 		/* If we were redirected, reconnect to new target server */
 		mount_put_conns(cifs_sb, xid, server, ses, tcon);
@@ -4636,7 +4725,7 @@ int cifs_mount(struct cifs_sb_info *cifs_sb, struct smb_vol *vol)
 	}
 	spin_unlock(&cifs_tcp_ses_lock);
 
-	rc = dfs_cache_add_vol(vol, cifs_sb->origin_fullpath);
+	rc = dfs_cache_add_vol(origin_mountdata, vol, cifs_sb->origin_fullpath);
 	if (rc) {
 		kfree(cifs_sb->origin_fullpath);
 		goto error;
@@ -4654,6 +4743,7 @@ out:
 error:
 	kfree(full_path);
 	kfree(root_path);
+	kfree(origin_mountdata);
 	mount_put_conns(cifs_sb, xid, server, ses, tcon);
 	return rc;
 }
@@ -4902,8 +4992,6 @@ cifs_negotiate_protocol(const unsigned int xid, struct cifs_ses *ses)
 	if (!server->ops->need_neg(server))
 		return 0;
 
-	set_credits(server, 1);
-
 	rc = server->ops->negotiate(xid, ses);
 	if (rc == 0) {
 		spin_lock(&GlobalMid_Lock);
diff --git a/fs/cifs/dfs_cache.c b/fs/cifs/dfs_cache.c
index 09b7d0d4f6e4..e3e1c13df439 100644
--- a/fs/cifs/dfs_cache.c
+++ b/fs/cifs/dfs_cache.c
@@ -2,7 +2,7 @@
 /*
  * DFS referral cache routines
  *
- * Copyright (c) 2018 Paulo Alcantara <palcantara@suse.de>
+ * Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de>
  */
 
 #include <linux/rcupdate.h>
@@ -52,6 +52,7 @@ static struct kmem_cache *dfs_cache_slab __read_mostly;
 struct dfs_cache_vol_info {
 	char *vi_fullpath;
 	struct smb_vol vi_vol;
+	char *vi_mntdata;
 	struct list_head vi_list;
 };
 
@@ -131,7 +132,7 @@ static inline void flush_cache_ent(struct dfs_cache_entry *ce)
 		return;
 
 	hlist_del_init_rcu(&ce->ce_hlist);
-	kfree(ce->ce_path);
+	kfree_const(ce->ce_path);
 	free_tgts(ce);
 	dfs_cache_count--;
 	call_rcu(&ce->ce_rcu, free_cache_entry);
@@ -421,7 +422,7 @@ alloc_cache_entry(const char *path, const struct dfs_info3_param *refs,
 
 	rc = copy_ref_data(refs, numrefs, ce, NULL);
 	if (rc) {
-		kfree(ce->ce_path);
+		kfree_const(ce->ce_path);
 		kmem_cache_free(dfs_cache_slab, ce);
 		ce = ERR_PTR(rc);
 	}
@@ -529,6 +530,7 @@ static inline void free_vol(struct dfs_cache_vol_info *vi)
 {
 	list_del(&vi->vi_list);
 	kfree(vi->vi_fullpath);
+	kfree(vi->vi_mntdata);
 	cifs_cleanup_volume_info_contents(&vi->vi_vol);
 	kfree(vi);
 }
@@ -1139,17 +1141,18 @@ err_free_username:
  * dfs_cache_add_vol - add a cifs volume during mount() that will be handled by
  * DFS cache refresh worker.
  *
+ * @mntdata: mount data.
  * @vol: cifs volume.
  * @fullpath: origin full path.
  *
  * Return zero if volume was set up correctly, otherwise non-zero.
  */
-int dfs_cache_add_vol(struct smb_vol *vol, const char *fullpath)
+int dfs_cache_add_vol(char *mntdata, struct smb_vol *vol, const char *fullpath)
 {
 	int rc;
 	struct dfs_cache_vol_info *vi;
 
-	if (!vol || !fullpath)
+	if (!vol || !fullpath || !mntdata)
 		return -EINVAL;
 
 	cifs_dbg(FYI, "%s: fullpath: %s\n", __func__, fullpath);
@@ -1168,6 +1171,8 @@ int dfs_cache_add_vol(struct smb_vol *vol, const char *fullpath)
 	if (rc)
 		goto err_free_fullpath;
 
+	vi->vi_mntdata = mntdata;
+
 	mutex_lock(&dfs_cache.dc_lock);
 	list_add_tail(&vi->vi_list, &dfs_cache.dc_vol_list);
 	mutex_unlock(&dfs_cache.dc_lock);
@@ -1275,8 +1280,102 @@ static void get_tcons(struct TCP_Server_Info *server, struct list_head *head)
 	spin_unlock(&cifs_tcp_ses_lock);
 }
 
+static inline bool is_dfs_link(const char *path)
+{
+	char *s;
+
+	s = strchr(path + 1, '\\');
+	if (!s)
+		return false;
+	return !!strchr(s + 1, '\\');
+}
+
+static inline char *get_dfs_root(const char *path)
+{
+	char *s, *npath;
+
+	s = strchr(path + 1, '\\');
+	if (!s)
+		return ERR_PTR(-EINVAL);
+
+	s = strchr(s + 1, '\\');
+	if (!s)
+		return ERR_PTR(-EINVAL);
+
+	npath = kstrndup(path, s - path, GFP_KERNEL);
+	if (!npath)
+		return ERR_PTR(-ENOMEM);
+
+	return npath;
+}
+
+/* Find root SMB session out of a DFS link path */
+static struct cifs_ses *find_root_ses(struct dfs_cache_vol_info *vi,
+				      struct cifs_tcon *tcon, const char *path)
+{
+	char *rpath;
+	int rc;
+	struct dfs_info3_param ref = {0};
+	char *mdata = NULL, *devname = NULL;
+	bool is_smb3 = tcon->ses->server->vals->header_preamble_size == 0;
+	struct TCP_Server_Info *server;
+	struct cifs_ses *ses;
+	struct smb_vol vol;
+
+	rpath = get_dfs_root(path);
+	if (IS_ERR(rpath))
+		return ERR_CAST(rpath);
+
+	memset(&vol, 0, sizeof(vol));
+
+	rc = dfs_cache_noreq_find(rpath, &ref, NULL);
+	if (rc) {
+		ses = ERR_PTR(rc);
+		goto out;
+	}
+
+	mdata = cifs_compose_mount_options(vi->vi_mntdata, rpath, &ref,
+					   &devname);
+	free_dfs_info_param(&ref);
+
+	if (IS_ERR(mdata)) {
+		ses = ERR_CAST(mdata);
+		mdata = NULL;
+		goto out;
+	}
+
+	rc = cifs_setup_volume_info(&vol, mdata, devname, is_smb3);
+	kfree(devname);
+
+	if (rc) {
+		ses = ERR_PTR(rc);
+		goto out;
+	}
+
+	server = cifs_find_tcp_session(&vol);
+	if (IS_ERR_OR_NULL(server)) {
+		ses = ERR_PTR(-EHOSTDOWN);
+		goto out;
+	}
+	if (server->tcpStatus != CifsGood) {
+		cifs_put_tcp_session(server, 0);
+		ses = ERR_PTR(-EHOSTDOWN);
+		goto out;
+	}
+
+	ses = cifs_get_smb_ses(server, &vol);
+
+out:
+	cifs_cleanup_volume_info_contents(&vol);
+	kfree(mdata);
+	kfree(rpath);
+
+	return ses;
+}
+
 /* Refresh DFS cache entry from a given tcon */
-static void do_refresh_tcon(struct dfs_cache *dc, struct cifs_tcon *tcon)
+static void do_refresh_tcon(struct dfs_cache *dc, struct dfs_cache_vol_info *vi,
+			    struct cifs_tcon *tcon)
 {
 	int rc = 0;
 	unsigned int xid;
@@ -1285,6 +1384,7 @@ static void do_refresh_tcon(struct dfs_cache *dc, struct cifs_tcon *tcon)
 	struct dfs_cache_entry *ce;
 	struct dfs_info3_param *refs = NULL;
 	int numrefs = 0;
+	struct cifs_ses *root_ses = NULL, *ses;
 
 	xid = get_xid();
 
@@ -1306,13 +1406,24 @@ static void do_refresh_tcon(struct dfs_cache *dc, struct cifs_tcon *tcon)
 	if (!cache_entry_expired(ce))
 		goto out;
 
-	if (unlikely(!tcon->ses->server->ops->get_dfs_refer)) {
+	/* If it's a DFS Link, then use root SMB session for refreshing it */
+	if (is_dfs_link(npath)) {
+		ses = root_ses = find_root_ses(vi, tcon, npath);
+		if (IS_ERR(ses)) {
+			rc = PTR_ERR(ses);
+			root_ses = NULL;
+			goto out;
+		}
+	} else {
+		ses = tcon->ses;
+	}
+
+	if (unlikely(!ses->server->ops->get_dfs_refer)) {
 		rc = -EOPNOTSUPP;
 	} else {
-		rc = tcon->ses->server->ops->get_dfs_refer(xid, tcon->ses, path,
-							   &refs, &numrefs,
-							   dc->dc_nlsc,
-							   tcon->remap);
+		rc = ses->server->ops->get_dfs_refer(xid, ses, path, &refs,
+						     &numrefs, dc->dc_nlsc,
+						     tcon->remap);
 		if (!rc) {
 			mutex_lock(&dfs_cache_list_lock);
 			ce = __update_cache_entry(npath, refs, numrefs);
@@ -1323,9 +1434,11 @@ static void do_refresh_tcon(struct dfs_cache *dc, struct cifs_tcon *tcon)
 				rc = PTR_ERR(ce);
 		}
 	}
-	if (rc)
-		cifs_dbg(FYI, "%s: failed to update expired entry\n", __func__);
+
 out:
+	if (root_ses)
+		cifs_put_smb_ses(root_ses);
+
 	free_xid(xid);
 	free_normalized_path(path, npath);
 }
@@ -1333,9 +1446,6 @@ out:
 /*
  * Worker that will refresh DFS cache based on lowest TTL value from a DFS
  * referral.
- *
- * FIXME: ensure that all requests are sent to DFS root for refreshing the
- * cache.
  */
 static void refresh_cache_worker(struct work_struct *work)
 {
@@ -1356,7 +1466,7 @@ static void refresh_cache_worker(struct work_struct *work)
 			goto next;
 		get_tcons(server, &list);
 		list_for_each_entry_safe(tcon, ntcon, &list, ulist) {
-			do_refresh_tcon(dc, tcon);
+			do_refresh_tcon(dc, vi, tcon);
 			list_del_init(&tcon->ulist);
 			cifs_put_tcon(tcon);
 		}
diff --git a/fs/cifs/dfs_cache.h b/fs/cifs/dfs_cache.h
index 22f366514f3a..76c732943f5f 100644
--- a/fs/cifs/dfs_cache.h
+++ b/fs/cifs/dfs_cache.h
@@ -2,7 +2,7 @@
 /*
  * DFS referral cache routines
  *
- * Copyright (c) 2018 Paulo Alcantara <palcantara@suse.de>
+ * Copyright (c) 2018-2019 Paulo Alcantara <palcantara@suse.de>
  */
 
 #ifndef _CIFS_DFS_CACHE_H
@@ -43,7 +43,8 @@ dfs_cache_noreq_update_tgthint(const char *path,
 extern int dfs_cache_get_tgt_referral(const char *path,
 				      const struct dfs_cache_tgt_iterator *it,
 				      struct dfs_info3_param *ref);
-extern int dfs_cache_add_vol(struct smb_vol *vol, const char *fullpath);
+extern int dfs_cache_add_vol(char *mntdata, struct smb_vol *vol,
+			const char *fullpath);
 extern int dfs_cache_update_vol(const char *fullpath,
 				struct TCP_Server_Info *server);
 extern void dfs_cache_del_vol(const char *fullpath);
diff --git a/fs/cifs/dir.c b/fs/cifs/dir.c
index 907e85d65bb4..f26a48dd2e39 100644
--- a/fs/cifs/dir.c
+++ b/fs/cifs/dir.c
@@ -621,20 +621,10 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode,
 {
 	int rc = -EPERM;
 	unsigned int xid;
-	int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
 	struct cifs_sb_info *cifs_sb;
 	struct tcon_link *tlink;
 	struct cifs_tcon *tcon;
-	struct cifs_io_parms io_parms;
 	char *full_path = NULL;
-	struct inode *newinode = NULL;
-	__u32 oplock = 0;
-	struct cifs_fid fid;
-	struct cifs_open_parms oparms;
-	FILE_ALL_INFO *buf = NULL;
-	unsigned int bytes_written;
-	struct win_dev *pdev;
-	struct kvec iov[2];
 
 	if (!old_valid_dev(device_number))
 		return -EINVAL;
@@ -654,103 +644,12 @@ int cifs_mknod(struct inode *inode, struct dentry *direntry, umode_t mode,
 		goto mknod_out;
 	}
 
-	if (tcon->unix_ext) {
-		struct cifs_unix_set_info_args args = {
-			.mode	= mode & ~current_umask(),
-			.ctime	= NO_CHANGE_64,
-			.atime	= NO_CHANGE_64,
-			.mtime	= NO_CHANGE_64,
-			.device	= device_number,
-		};
-		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
-			args.uid = current_fsuid();
-			args.gid = current_fsgid();
-		} else {
-			args.uid = INVALID_UID; /* no change */
-			args.gid = INVALID_GID; /* no change */
-		}
-		rc = CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
-					    cifs_sb->local_nls,
-					    cifs_remap(cifs_sb));
-		if (rc)
-			goto mknod_out;
-
-		rc = cifs_get_inode_info_unix(&newinode, full_path,
-						inode->i_sb, xid);
-
-		if (rc == 0)
-			d_instantiate(direntry, newinode);
-		goto mknod_out;
-	}
-
-	if (!S_ISCHR(mode) && !S_ISBLK(mode))
-		goto mknod_out;
-
-	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
-		goto mknod_out;
-
-
-	cifs_dbg(FYI, "sfu compat create special file\n");
-
-	buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
-	if (buf == NULL) {
-		rc = -ENOMEM;
-		goto mknod_out;
-	}
-
-	if (backup_cred(cifs_sb))
-		create_options |= CREATE_OPEN_BACKUP_INTENT;
-
-	oparms.tcon = tcon;
-	oparms.cifs_sb = cifs_sb;
-	oparms.desired_access = GENERIC_WRITE;
-	oparms.create_options = create_options;
-	oparms.disposition = FILE_CREATE;
-	oparms.path = full_path;
-	oparms.fid = &fid;
-	oparms.reconnect = false;
-
-	if (tcon->ses->server->oplocks)
-		oplock = REQ_OPLOCK;
-	else
-		oplock = 0;
-	rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
-	if (rc)
-		goto mknod_out;
-
-	/*
-	 * BB Do not bother to decode buf since no local inode yet to put
-	 * timestamps in, but we can reuse it safely.
-	 */
-
-	pdev = (struct win_dev *)buf;
-	io_parms.pid = current->tgid;
-	io_parms.tcon = tcon;
-	io_parms.offset = 0;
-	io_parms.length = sizeof(struct win_dev);
-	iov[1].iov_base = buf;
-	iov[1].iov_len = sizeof(struct win_dev);
-	if (S_ISCHR(mode)) {
-		memcpy(pdev->type, "IntxCHR", 8);
-		pdev->major = cpu_to_le64(MAJOR(device_number));
-		pdev->minor = cpu_to_le64(MINOR(device_number));
-		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
-							&bytes_written, iov, 1);
-	} else if (S_ISBLK(mode)) {
-		memcpy(pdev->type, "IntxBLK", 8);
-		pdev->major = cpu_to_le64(MAJOR(device_number));
-		pdev->minor = cpu_to_le64(MINOR(device_number));
-		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
-							&bytes_written, iov, 1);
-	}
-	tcon->ses->server->ops->close(xid, tcon, &fid);
-	d_drop(direntry);
-
-	/* FIXME: add code here to set EAs */
+	rc = tcon->ses->server->ops->make_node(xid, inode, direntry, tcon,
+					       full_path, mode,
+					       device_number);
 
 mknod_out:
 	kfree(full_path);
-	kfree(buf);
 	free_xid(xid);
 	cifs_put_tlink(tlink);
 	return rc;
diff --git a/fs/cifs/dns_resolve.c b/fs/cifs/dns_resolve.c
index 7ede7306599f..534cbba72789 100644
--- a/fs/cifs/dns_resolve.c
+++ b/fs/cifs/dns_resolve.c
@@ -77,7 +77,8 @@ dns_resolve_server_name_to_ip(const char *unc, char **ip_addr)
 		goto name_is_IP_address;
 
 	/* Perform the upcall */
-	rc = dns_query(NULL, hostname, len, NULL, ip_addr, NULL);
+	rc = dns_query(current->nsproxy->net_ns, NULL, hostname, len,
+		       NULL, ip_addr, NULL, false);
 	if (rc < 0)
 		cifs_dbg(FYI, "%s: unable to resolve: %*.*s\n",
 			 __func__, len, len, hostname);
diff --git a/fs/cifs/file.c b/fs/cifs/file.c
index 659ce1b92c44..97090693d182 100644
--- a/fs/cifs/file.c
+++ b/fs/cifs/file.c
@@ -338,10 +338,12 @@ cifs_new_fileinfo(struct cifs_fid *fid, struct file *file,
 	atomic_inc(&tcon->num_local_opens);
 
 	/* if readable file instance put first in list*/
+	spin_lock(&cinode->open_file_lock);
 	if (file->f_mode & FMODE_READ)
 		list_add(&cfile->flist, &cinode->openFileList);
 	else
 		list_add_tail(&cfile->flist, &cinode->openFileList);
+	spin_unlock(&cinode->open_file_lock);
 	spin_unlock(&tcon->open_file_lock);
 
 	if (fid->purge_cache)
@@ -360,13 +362,31 @@ cifsFileInfo_get(struct cifsFileInfo *cifs_file)
 	return cifs_file;
 }
 
-/*
- * Release a reference on the file private data. This may involve closing
- * the filehandle out on the server. Must be called without holding
- * tcon->open_file_lock and cifs_file->file_info_lock.
+/**
+ * cifsFileInfo_put - release a reference of file priv data
+ *
+ * Always potentially wait for oplock handler. See _cifsFileInfo_put().
  */
 void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
 {
+	_cifsFileInfo_put(cifs_file, true);
+}
+
+/**
+ * _cifsFileInfo_put - release a reference of file priv data
+ *
+ * This may involve closing the filehandle @cifs_file out on the
+ * server. Must be called without holding tcon->open_file_lock and
+ * cifs_file->file_info_lock.
+ *
+ * If @wait_for_oplock_handler is true and we are releasing the last
+ * reference, wait for any running oplock break handler of the file
+ * and cancel any pending one. If calling this function from the
+ * oplock break handler, you need to pass false.
+ *
+ */
+void _cifsFileInfo_put(struct cifsFileInfo *cifs_file, bool wait_oplock_handler)
+{
 	struct inode *inode = d_inode(cifs_file->dentry);
 	struct cifs_tcon *tcon = tlink_tcon(cifs_file->tlink);
 	struct TCP_Server_Info *server = tcon->ses->server;
@@ -395,7 +415,9 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
 	cifs_add_pending_open_locked(&fid, cifs_file->tlink, &open);
 
 	/* remove it from the lists */
+	spin_lock(&cifsi->open_file_lock);
 	list_del(&cifs_file->flist);
+	spin_unlock(&cifsi->open_file_lock);
 	list_del(&cifs_file->tlist);
 	atomic_dec(&tcon->num_local_opens);
 
@@ -414,7 +436,8 @@ void cifsFileInfo_put(struct cifsFileInfo *cifs_file)
 
 	spin_unlock(&tcon->open_file_lock);
 
-	oplock_break_cancelled = cancel_work_sync(&cifs_file->oplock_break);
+	oplock_break_cancelled = wait_oplock_handler ?
+		cancel_work_sync(&cifs_file->oplock_break) : false;
 
 	if (!tcon->need_reconnect && !cifs_file->invalidHandle) {
 		struct TCP_Server_Info *server = tcon->ses->server;
@@ -1645,8 +1668,20 @@ cifs_setlk(struct file *file, struct file_lock *flock, __u32 type,
 		rc = server->ops->mand_unlock_range(cfile, flock, xid);
 
 out:
-	if (flock->fl_flags & FL_POSIX && !rc)
+	if (flock->fl_flags & FL_POSIX) {
+		/*
+		 * If this is a request to remove all locks because we
+		 * are closing the file, it doesn't matter if the
+		 * unlocking failed as both cifs.ko and the SMB server
+		 * remove the lock on file close
+		 */
+		if (rc) {
+			cifs_dbg(VFS, "%s failed rc=%d\n", __func__, rc);
+			if (!(flock->fl_flags & FL_CLOSE))
+				return rc;
+		}
 		rc = locks_lock_file_wait(file, flock);
+	}
 	return rc;
 }
 
@@ -1842,24 +1877,30 @@ struct cifsFileInfo *find_readable_file(struct cifsInodeInfo *cifs_inode,
 	return NULL;
 }
 
-struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode,
-					bool fsuid_only)
+/* Return -EBADF if no handle is found and general rc otherwise */
+int
+cifs_get_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only,
+		       struct cifsFileInfo **ret_file)
 {
 	struct cifsFileInfo *open_file, *inv_file = NULL;
 	struct cifs_sb_info *cifs_sb;
 	struct cifs_tcon *tcon;
 	bool any_available = false;
-	int rc;
+	int rc = -EBADF;
 	unsigned int refind = 0;
 
-	/* Having a null inode here (because mapping->host was set to zero by
-	the VFS or MM) should not happen but we had reports of on oops (due to
-	it being zero) during stress testcases so we need to check for it */
+	*ret_file = NULL;
+
+	/*
+	 * Having a null inode here (because mapping->host was set to zero by
+	 * the VFS or MM) should not happen but we had reports of on oops (due
+	 * to it being zero) during stress testcases so we need to check for it
+	 */
 
 	if (cifs_inode == NULL) {
 		cifs_dbg(VFS, "Null inode passed to cifs_writeable_file\n");
 		dump_stack();
-		return NULL;
+		return rc;
 	}
 
 	cifs_sb = CIFS_SB(cifs_inode->vfs_inode.i_sb);
@@ -1873,7 +1914,7 @@ struct cifsFileInfo *find_writable_file(struct cifsInodeInfo *cifs_inode,
 refind_writable:
 	if (refind > MAX_REOPEN_ATT) {
 		spin_unlock(&tcon->open_file_lock);
-		return NULL;
+		return rc;
 	}
 	list_for_each_entry(open_file, &cifs_inode->openFileList, flist) {
 		if (!any_available && open_file->pid != current->tgid)
@@ -1885,7 +1926,8 @@ refind_writable:
 				/* found a good writable file */
 				cifsFileInfo_get(open_file);
 				spin_unlock(&tcon->open_file_lock);
-				return open_file;
+				*ret_file = open_file;
+				return 0;
 			} else {
 				if (!inv_file)
 					inv_file = open_file;
@@ -1907,22 +1949,35 @@ refind_writable:
 
 	if (inv_file) {
 		rc = cifs_reopen_file(inv_file, false);
-		if (!rc)
-			return inv_file;
-		else {
-			spin_lock(&tcon->open_file_lock);
-			list_move_tail(&inv_file->flist,
-					&cifs_inode->openFileList);
-			spin_unlock(&tcon->open_file_lock);
-			cifsFileInfo_put(inv_file);
-			++refind;
-			inv_file = NULL;
-			spin_lock(&tcon->open_file_lock);
-			goto refind_writable;
+		if (!rc) {
+			*ret_file = inv_file;
+			return 0;
 		}
+
+		spin_lock(&cifs_inode->open_file_lock);
+		list_move_tail(&inv_file->flist, &cifs_inode->openFileList);
+		spin_unlock(&cifs_inode->open_file_lock);
+		cifsFileInfo_put(inv_file);
+		++refind;
+		inv_file = NULL;
+		spin_lock(&tcon->open_file_lock);
+		goto refind_writable;
 	}
 
-	return NULL;
+	return rc;
+}
+
+struct cifsFileInfo *
+find_writable_file(struct cifsInodeInfo *cifs_inode, bool fsuid_only)
+{
+	struct cifsFileInfo *cfile;
+	int rc;
+
+	rc = cifs_get_writable_file(cifs_inode, fsuid_only, &cfile);
+	if (rc)
+		cifs_dbg(FYI, "couldn't find writable handle rc=%d", rc);
+
+	return cfile;
 }
 
 static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
@@ -1959,8 +2014,8 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
 	if (mapping->host->i_size - offset < (loff_t)to)
 		to = (unsigned)(mapping->host->i_size - offset);
 
-	open_file = find_writable_file(CIFS_I(mapping->host), false);
-	if (open_file) {
+	rc = cifs_get_writable_file(CIFS_I(mapping->host), false, &open_file);
+	if (!rc) {
 		bytes_written = cifs_write(open_file, open_file->pid,
 					   write_data, to - from, &offset);
 		cifsFileInfo_put(open_file);
@@ -1970,9 +2025,12 @@ static int cifs_partialpagewrite(struct page *page, unsigned from, unsigned to)
 			rc = 0;
 		else if (bytes_written < 0)
 			rc = bytes_written;
+		else
+			rc = -EFAULT;
 	} else {
-		cifs_dbg(FYI, "No writeable filehandles for inode\n");
-		rc = -EIO;
+		cifs_dbg(FYI, "No writable handle for write page rc=%d\n", rc);
+		if (!is_retryable_error(rc))
+			rc = -EIO;
 	}
 
 	kunmap(page);
@@ -2079,9 +2137,9 @@ static int
 wdata_send_pages(struct cifs_writedata *wdata, unsigned int nr_pages,
 		 struct address_space *mapping, struct writeback_control *wbc)
 {
-	int rc = 0;
-	struct TCP_Server_Info *server;
-	unsigned int i;
+	int rc;
+	struct TCP_Server_Info *server =
+				tlink_tcon(wdata->cfile->tlink)->ses->server;
 
 	wdata->sync_mode = wbc->sync_mode;
 	wdata->nr_pages = nr_pages;
@@ -2091,21 +2149,16 @@ wdata_send_pages(struct cifs_writedata *wdata, unsigned int nr_pages,
 			page_offset(wdata->pages[nr_pages - 1]),
 			(loff_t)PAGE_SIZE);
 	wdata->bytes = ((nr_pages - 1) * PAGE_SIZE) + wdata->tailsz;
+	wdata->pid = wdata->cfile->pid;
 
-	if (wdata->cfile != NULL)
-		cifsFileInfo_put(wdata->cfile);
-	wdata->cfile = find_writable_file(CIFS_I(mapping->host), false);
-	if (!wdata->cfile) {
-		cifs_dbg(VFS, "No writable handles for inode\n");
-		rc = -EBADF;
-	} else {
-		wdata->pid = wdata->cfile->pid;
-		server = tlink_tcon(wdata->cfile->tlink)->ses->server;
-		rc = server->ops->async_writev(wdata, cifs_writedata_release);
-	}
+	rc = adjust_credits(server, &wdata->credits, wdata->bytes);
+	if (rc)
+		return rc;
 
-	for (i = 0; i < nr_pages; ++i)
-		unlock_page(wdata->pages[i]);
+	if (wdata->cfile->invalidHandle)
+		rc = -EAGAIN;
+	else
+		rc = server->ops->async_writev(wdata, cifs_writedata_release);
 
 	return rc;
 }
@@ -2113,11 +2166,13 @@ wdata_send_pages(struct cifs_writedata *wdata, unsigned int nr_pages,
 static int cifs_writepages(struct address_space *mapping,
 			   struct writeback_control *wbc)
 {
-	struct cifs_sb_info *cifs_sb = CIFS_SB(mapping->host->i_sb);
+	struct inode *inode = mapping->host;
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
 	struct TCP_Server_Info *server;
 	bool done = false, scanned = false, range_whole = false;
 	pgoff_t end, index;
 	struct cifs_writedata *wdata;
+	struct cifsFileInfo *cfile = NULL;
 	int rc = 0;
 	int saved_rc = 0;
 	unsigned int xid;
@@ -2143,11 +2198,23 @@ static int cifs_writepages(struct address_space *mapping,
 	server = cifs_sb_master_tcon(cifs_sb)->ses->server;
 retry:
 	while (!done && index <= end) {
-		unsigned int i, nr_pages, found_pages, wsize, credits;
+		unsigned int i, nr_pages, found_pages, wsize;
 		pgoff_t next = 0, tofind, saved_index = index;
+		struct cifs_credits credits_on_stack;
+		struct cifs_credits *credits = &credits_on_stack;
+		int get_file_rc = 0;
+
+		if (cfile)
+			cifsFileInfo_put(cfile);
+
+		rc = cifs_get_writable_file(CIFS_I(inode), false, &cfile);
+
+		/* in case of an error store it to return later */
+		if (rc)
+			get_file_rc = rc;
 
 		rc = server->ops->wait_mtu_credits(server, cifs_sb->wsize,
-						   &wsize, &credits);
+						   &wsize, credits);
 		if (rc != 0) {
 			done = true;
 			break;
@@ -2180,13 +2247,26 @@ retry:
 			continue;
 		}
 
-		wdata->credits = credits;
+		wdata->credits = credits_on_stack;
+		wdata->cfile = cfile;
+		cfile = NULL;
 
-		rc = wdata_send_pages(wdata, nr_pages, mapping, wbc);
+		if (!wdata->cfile) {
+			cifs_dbg(VFS, "No writable handle in writepages rc=%d\n",
+				 get_file_rc);
+			if (is_retryable_error(get_file_rc))
+				rc = get_file_rc;
+			else
+				rc = -EBADF;
+		} else
+			rc = wdata_send_pages(wdata, nr_pages, mapping, wbc);
+
+		for (i = 0; i < nr_pages; ++i)
+			unlock_page(wdata->pages[i]);
 
 		/* send failure -- clean up the mess */
 		if (rc != 0) {
-			add_credits_and_wake_if(server, wdata->credits, 0);
+			add_credits_and_wake_if(server, &wdata->credits, 0);
 			for (i = 0; i < nr_pages; ++i) {
 				if (is_retryable_error(rc))
 					redirty_page_for_writepage(wbc,
@@ -2238,6 +2318,8 @@ retry:
 	if (wbc->range_cyclic || (range_whole && wbc->nr_to_write > 0))
 		mapping->writeback_index = index;
 
+	if (cfile)
+		cifsFileInfo_put(cfile);
 	free_xid(xid);
 	return rc;
 }
@@ -2365,7 +2447,6 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end,
 	rc = file_write_and_wait_range(file, start, end);
 	if (rc)
 		return rc;
-	inode_lock(inode);
 
 	xid = get_xid();
 
@@ -2390,7 +2471,6 @@ int cifs_strict_fsync(struct file *file, loff_t start, loff_t end,
 	}
 
 	free_xid(xid);
-	inode_unlock(inode);
 	return rc;
 }
 
@@ -2402,12 +2482,10 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 	struct TCP_Server_Info *server;
 	struct cifsFileInfo *smbfile = file->private_data;
 	struct cifs_sb_info *cifs_sb = CIFS_FILE_SB(file);
-	struct inode *inode = file->f_mapping->host;
 
 	rc = file_write_and_wait_range(file, start, end);
 	if (rc)
 		return rc;
-	inode_lock(inode);
 
 	xid = get_xid();
 
@@ -2424,7 +2502,6 @@ int cifs_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 	}
 
 	free_xid(xid);
-	inode_unlock(inode);
 	return rc;
 }
 
@@ -2567,47 +2644,62 @@ static int
 cifs_resend_wdata(struct cifs_writedata *wdata, struct list_head *wdata_list,
 	struct cifs_aio_ctx *ctx)
 {
-	unsigned int wsize, credits;
+	unsigned int wsize;
+	struct cifs_credits credits;
 	int rc;
 	struct TCP_Server_Info *server =
 		tlink_tcon(wdata->cfile->tlink)->ses->server;
 
-	/*
-	 * Wait for credits to resend this wdata.
-	 * Note: we are attempting to resend the whole wdata not in segments
-	 */
 	do {
-		rc = server->ops->wait_mtu_credits(
-			server, wdata->bytes, &wsize, &credits);
+		if (wdata->cfile->invalidHandle) {
+			rc = cifs_reopen_file(wdata->cfile, false);
+			if (rc == -EAGAIN)
+				continue;
+			else if (rc)
+				break;
+		}
 
-		if (rc)
-			goto out;
 
-		if (wsize < wdata->bytes) {
-			add_credits_and_wake_if(server, credits, 0);
-			msleep(1000);
-		}
-	} while (wsize < wdata->bytes);
+		/*
+		 * Wait for credits to resend this wdata.
+		 * Note: we are attempting to resend the whole wdata not in
+		 * segments
+		 */
+		do {
+			rc = server->ops->wait_mtu_credits(server, wdata->bytes,
+						&wsize, &credits);
+			if (rc)
+				goto fail;
+
+			if (wsize < wdata->bytes) {
+				add_credits_and_wake_if(server, &credits, 0);
+				msleep(1000);
+			}
+		} while (wsize < wdata->bytes);
+		wdata->credits = credits;
 
-	rc = -EAGAIN;
-	while (rc == -EAGAIN) {
-		rc = 0;
-		if (wdata->cfile->invalidHandle)
-			rc = cifs_reopen_file(wdata->cfile, false);
-		if (!rc)
-			rc = server->ops->async_writev(wdata,
+		rc = adjust_credits(server, &wdata->credits, wdata->bytes);
+
+		if (!rc) {
+			if (wdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else
+				rc = server->ops->async_writev(wdata,
 					cifs_uncached_writedata_release);
-	}
+		}
 
-	if (!rc) {
-		list_add_tail(&wdata->list, wdata_list);
-		return 0;
-	}
+		/* If the write was successfully sent, we are done */
+		if (!rc) {
+			list_add_tail(&wdata->list, wdata_list);
+			return 0;
+		}
 
-	add_credits_and_wake_if(server, wdata->credits, 0);
-out:
-	kref_put(&wdata->refcount, cifs_uncached_writedata_release);
+		/* Roll back credits and retry if needed */
+		add_credits_and_wake_if(server, &wdata->credits, 0);
+	} while (rc == -EAGAIN);
 
+fail:
+	kref_put(&wdata->refcount, cifs_uncached_writedata_release);
 	return rc;
 }
 
@@ -2627,6 +2719,7 @@ cifs_write_from_iter(loff_t offset, size_t len, struct iov_iter *from,
 	struct TCP_Server_Info *server;
 	struct page **pagevec;
 	size_t start;
+	unsigned int xid;
 
 	if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_RWPIDFORWARD)
 		pid = open_file->pid;
@@ -2634,12 +2727,23 @@ cifs_write_from_iter(loff_t offset, size_t len, struct iov_iter *from,
 		pid = current->tgid;
 
 	server = tlink_tcon(open_file->tlink)->ses->server;
+	xid = get_xid();
 
 	do {
-		unsigned int wsize, credits;
+		unsigned int wsize;
+		struct cifs_credits credits_on_stack;
+		struct cifs_credits *credits = &credits_on_stack;
+
+		if (open_file->invalidHandle) {
+			rc = cifs_reopen_file(open_file, false);
+			if (rc == -EAGAIN)
+				continue;
+			else if (rc)
+				break;
+		}
 
 		rc = server->ops->wait_mtu_credits(server, cifs_sb->wsize,
-						   &wsize, &credits);
+						   &wsize, credits);
 		if (rc)
 			break;
 
@@ -2731,16 +2835,22 @@ cifs_write_from_iter(loff_t offset, size_t len, struct iov_iter *from,
 		wdata->pid = pid;
 		wdata->bytes = cur_len;
 		wdata->pagesz = PAGE_SIZE;
-		wdata->credits = credits;
+		wdata->credits = credits_on_stack;
 		wdata->ctx = ctx;
 		kref_get(&ctx->refcount);
 
-		if (!wdata->cfile->invalidHandle ||
-		    !(rc = cifs_reopen_file(wdata->cfile, false)))
-			rc = server->ops->async_writev(wdata,
+		rc = adjust_credits(server, &wdata->credits, wdata->bytes);
+
+		if (!rc) {
+			if (wdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else
+				rc = server->ops->async_writev(wdata,
 					cifs_uncached_writedata_release);
+		}
+
 		if (rc) {
-			add_credits_and_wake_if(server, wdata->credits, 0);
+			add_credits_and_wake_if(server, &wdata->credits, 0);
 			kref_put(&wdata->refcount,
 				 cifs_uncached_writedata_release);
 			if (rc == -EAGAIN) {
@@ -2756,6 +2866,7 @@ cifs_write_from_iter(loff_t offset, size_t len, struct iov_iter *from,
 		len -= cur_len;
 	} while (len > 0);
 
+	free_xid(xid);
 	return rc;
 }
 
@@ -2765,7 +2876,6 @@ static void collect_uncached_write_data(struct cifs_aio_ctx *ctx)
 	struct cifs_tcon *tcon;
 	struct cifs_sb_info *cifs_sb;
 	struct dentry *dentry = ctx->cfile->dentry;
-	unsigned int i;
 	int rc;
 
 	tcon = tlink_tcon(ctx->cfile->tlink);
@@ -2816,12 +2926,12 @@ restart_loop:
 						wdata->bytes, &tmp_from,
 						ctx->cfile, cifs_sb, &tmp_list,
 						ctx);
+
+					kref_put(&wdata->refcount,
+						cifs_uncached_writedata_release);
 				}
 
 				list_splice(&tmp_list, &ctx->list);
-
-				kref_put(&wdata->refcount,
-					 cifs_uncached_writedata_release);
 				goto restart_loop;
 			}
 		}
@@ -2829,10 +2939,6 @@ restart_loop:
 		kref_put(&wdata->refcount, cifs_uncached_writedata_release);
 	}
 
-	if (!ctx->direct_io)
-		for (i = 0; i < ctx->npages; i++)
-			put_page(ctx->bv[i].bv_page);
-
 	cifs_stats_bytes_written(tcon, ctx->total_len);
 	set_bit(CIFS_INO_INVALID_MAPPING, &CIFS_I(dentry->d_inode)->flags);
 
@@ -3028,14 +3134,16 @@ cifs_strict_writev(struct kiocb *iocb, struct iov_iter *from)
 	 * these pages but not on the region from pos to ppos+len-1.
 	 */
 	written = cifs_user_writev(iocb, from);
-	if (written > 0 && CIFS_CACHE_READ(cinode)) {
+	if (CIFS_CACHE_READ(cinode)) {
 		/*
-		 * Windows 7 server can delay breaking level2 oplock if a write
-		 * request comes - break it on the client to prevent reading
-		 * an old data.
+		 * We have read level caching and we have just sent a write
+		 * request to the server thus making data in the cache stale.
+		 * Zap the cache and set oplock/lease level to NONE to avoid
+		 * reading stale data from the cache. All subsequent read
+		 * operations will read new data from the server.
 		 */
 		cifs_zap_mapping(inode);
-		cifs_dbg(FYI, "Set no oplock for inode=%p after a write operation\n",
+		cifs_dbg(FYI, "Set Oplock/Lease to NONE for inode=%p after write\n",
 			 inode);
 		cinode->oplock = 0;
 	}
@@ -3112,7 +3220,9 @@ cifs_read_allocate_pages(struct cifs_readdata *rdata, unsigned int nr_pages)
 	}
 
 	if (rc) {
-		for (i = 0; i < nr_pages; i++) {
+		unsigned int nr_page_failed = i;
+
+		for (i = 0; i < nr_page_failed; i++) {
 			put_page(rdata->pages[i]);
 			rdata->pages[i] = NULL;
 		}
@@ -3260,48 +3370,61 @@ static int cifs_resend_rdata(struct cifs_readdata *rdata,
 			struct list_head *rdata_list,
 			struct cifs_aio_ctx *ctx)
 {
-	unsigned int rsize, credits;
+	unsigned int rsize;
+	struct cifs_credits credits;
 	int rc;
 	struct TCP_Server_Info *server =
 		tlink_tcon(rdata->cfile->tlink)->ses->server;
 
-	/*
-	 * Wait for credits to resend this rdata.
-	 * Note: we are attempting to resend the whole rdata not in segments
-	 */
 	do {
-		rc = server->ops->wait_mtu_credits(server, rdata->bytes,
+		if (rdata->cfile->invalidHandle) {
+			rc = cifs_reopen_file(rdata->cfile, true);
+			if (rc == -EAGAIN)
+				continue;
+			else if (rc)
+				break;
+		}
+
+		/*
+		 * Wait for credits to resend this rdata.
+		 * Note: we are attempting to resend the whole rdata not in
+		 * segments
+		 */
+		do {
+			rc = server->ops->wait_mtu_credits(server, rdata->bytes,
 						&rsize, &credits);
 
-		if (rc)
-			goto out;
+			if (rc)
+				goto fail;
 
-		if (rsize < rdata->bytes) {
-			add_credits_and_wake_if(server, credits, 0);
-			msleep(1000);
-		}
-	} while (rsize < rdata->bytes);
+			if (rsize < rdata->bytes) {
+				add_credits_and_wake_if(server, &credits, 0);
+				msleep(1000);
+			}
+		} while (rsize < rdata->bytes);
+		rdata->credits = credits;
 
-	rc = -EAGAIN;
-	while (rc == -EAGAIN) {
-		rc = 0;
-		if (rdata->cfile->invalidHandle)
-			rc = cifs_reopen_file(rdata->cfile, true);
-		if (!rc)
-			rc = server->ops->async_readv(rdata);
-	}
+		rc = adjust_credits(server, &rdata->credits, rdata->bytes);
+		if (!rc) {
+			if (rdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else
+				rc = server->ops->async_readv(rdata);
+		}
 
-	if (!rc) {
-		/* Add to aio pending list */
-		list_add_tail(&rdata->list, rdata_list);
-		return 0;
-	}
+		/* If the read was successfully sent, we are done */
+		if (!rc) {
+			/* Add to aio pending list */
+			list_add_tail(&rdata->list, rdata_list);
+			return 0;
+		}
 
-	add_credits_and_wake_if(server, rdata->credits, 0);
-out:
-	kref_put(&rdata->refcount,
-		cifs_uncached_readdata_release);
+		/* Roll back credits and retry if needed */
+		add_credits_and_wake_if(server, &rdata->credits, 0);
+	} while (rc == -EAGAIN);
 
+fail:
+	kref_put(&rdata->refcount, cifs_uncached_readdata_release);
 	return rc;
 }
 
@@ -3311,7 +3434,9 @@ cifs_send_async_read(loff_t offset, size_t len, struct cifsFileInfo *open_file,
 		     struct cifs_aio_ctx *ctx)
 {
 	struct cifs_readdata *rdata;
-	unsigned int npages, rsize, credits;
+	unsigned int npages, rsize;
+	struct cifs_credits credits_on_stack;
+	struct cifs_credits *credits = &credits_on_stack;
 	size_t cur_len;
 	int rc;
 	pid_t pid;
@@ -3331,8 +3456,16 @@ cifs_send_async_read(loff_t offset, size_t len, struct cifsFileInfo *open_file,
 		iov_iter_advance(&direct_iov, offset - ctx->pos);
 
 	do {
+		if (open_file->invalidHandle) {
+			rc = cifs_reopen_file(open_file, true);
+			if (rc == -EAGAIN)
+				continue;
+			else if (rc)
+				break;
+		}
+
 		rc = server->ops->wait_mtu_credits(server, cifs_sb->rsize,
-						   &rsize, &credits);
+						   &rsize, credits);
 		if (rc)
 			break;
 
@@ -3406,15 +3539,21 @@ cifs_send_async_read(loff_t offset, size_t len, struct cifsFileInfo *open_file,
 		rdata->pagesz = PAGE_SIZE;
 		rdata->read_into_pages = cifs_uncached_read_into_pages;
 		rdata->copy_into_pages = cifs_uncached_copy_into_pages;
-		rdata->credits = credits;
+		rdata->credits = credits_on_stack;
 		rdata->ctx = ctx;
 		kref_get(&ctx->refcount);
 
-		if (!rdata->cfile->invalidHandle ||
-		    !(rc = cifs_reopen_file(rdata->cfile, true)))
-			rc = server->ops->async_readv(rdata);
+		rc = adjust_credits(server, &rdata->credits, rdata->bytes);
+
+		if (!rc) {
+			if (rdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else
+				rc = server->ops->async_readv(rdata);
+		}
+
 		if (rc) {
-			add_credits_and_wake_if(server, rdata->credits, 0);
+			add_credits_and_wake_if(server, &rdata->credits, 0);
 			kref_put(&rdata->refcount,
 				cifs_uncached_readdata_release);
 			if (rc == -EAGAIN) {
@@ -3439,7 +3578,6 @@ collect_uncached_read_data(struct cifs_aio_ctx *ctx)
 	struct iov_iter *to = &ctx->iter;
 	struct cifs_sb_info *cifs_sb;
 	struct cifs_tcon *tcon;
-	unsigned int i;
 	int rc;
 
 	tcon = tlink_tcon(ctx->cfile->tlink);
@@ -3523,17 +3661,8 @@ again:
 		kref_put(&rdata->refcount, cifs_uncached_readdata_release);
 	}
 
-	if (!ctx->direct_io) {
-		for (i = 0; i < ctx->npages; i++) {
-			if (ctx->should_dirty)
-				set_page_dirty(ctx->bv[i].bv_page);
-			put_page(ctx->bv[i].bv_page);
-		}
-
+	if (!ctx->direct_io)
 		ctx->total_len = ctx->len - iov_iter_count(to);
-	}
-
-	cifs_stats_bytes_read(tcon, ctx->total_len);
 
 	/* mask nodata case */
 	if (rc == -ENODATA)
@@ -4095,10 +4224,19 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
 		loff_t offset;
 		struct page *page, *tpage;
 		struct cifs_readdata *rdata;
-		unsigned credits;
+		struct cifs_credits credits_on_stack;
+		struct cifs_credits *credits = &credits_on_stack;
+
+		if (open_file->invalidHandle) {
+			rc = cifs_reopen_file(open_file, true);
+			if (rc == -EAGAIN)
+				continue;
+			else if (rc)
+				break;
+		}
 
 		rc = server->ops->wait_mtu_credits(server, cifs_sb->rsize,
-						   &rsize, &credits);
+						   &rsize, credits);
 		if (rc)
 			break;
 
@@ -4144,18 +4282,24 @@ static int cifs_readpages(struct file *file, struct address_space *mapping,
 		rdata->tailsz = PAGE_SIZE;
 		rdata->read_into_pages = cifs_readpages_read_into_pages;
 		rdata->copy_into_pages = cifs_readpages_copy_into_pages;
-		rdata->credits = credits;
+		rdata->credits = credits_on_stack;
 
 		list_for_each_entry_safe(page, tpage, &tmplist, lru) {
 			list_del(&page->lru);
 			rdata->pages[rdata->nr_pages++] = page;
 		}
 
-		if (!rdata->cfile->invalidHandle ||
-		    !(rc = cifs_reopen_file(rdata->cfile, true)))
-			rc = server->ops->async_readv(rdata);
+		rc = adjust_credits(server, &rdata->credits, rdata->bytes);
+
+		if (!rc) {
+			if (rdata->cfile->invalidHandle)
+				rc = -EAGAIN;
+			else
+				rc = server->ops->async_readv(rdata);
+		}
+
 		if (rc) {
-			add_credits_and_wake_if(server, rdata->credits, 0);
+			add_credits_and_wake_if(server, &rdata->credits, 0);
 			for (i = 0; i < rdata->nr_pages; i++) {
 				page = rdata->pages[i];
 				lru_cache_add_file(page);
@@ -4466,6 +4610,7 @@ void cifs_oplock_break(struct work_struct *work)
 							     cinode);
 		cifs_dbg(FYI, "Oplock release rc = %d\n", rc);
 	}
+	_cifsFileInfo_put(cfile, false /* do not wait for ourself */);
 	cifs_done_oplock_break(cinode);
 }
 
diff --git a/fs/cifs/inode.c b/fs/cifs/inode.c
index 478003644916..d7cc62252634 100644
--- a/fs/cifs/inode.c
+++ b/fs/cifs/inode.c
@@ -1735,6 +1735,10 @@ cifs_do_rename(const unsigned int xid, struct dentry *from_dentry,
 	if (rc == 0 || rc != -EBUSY)
 		goto do_rename_exit;
 
+	/* Don't fall back to using SMB on SMB 2+ mount */
+	if (server->vals->protocol_id != 0)
+		goto do_rename_exit;
+
 	/* open-file renames don't work across directories */
 	if (to_dentry->d_parent != from_dentry->d_parent)
 		goto do_rename_exit;
@@ -2080,7 +2084,7 @@ int cifs_getattr(const struct path *path, struct kstat *stat,
 		return rc;
 
 	generic_fillattr(inode, stat);
-	stat->blksize = CIFS_MAX_MSGSIZE;
+	stat->blksize = cifs_sb->bsize;
 	stat->ino = CIFS_I(inode)->uniqueid;
 
 	/* old CIFS Unix Extensions doesn't return create time */
@@ -2112,6 +2116,43 @@ int cifs_getattr(const struct path *path, struct kstat *stat,
 	return rc;
 }
 
+int cifs_fiemap(struct inode *inode, struct fiemap_extent_info *fei, u64 start,
+		u64 len)
+{
+	struct cifsInodeInfo *cifs_i = CIFS_I(inode);
+	struct cifs_sb_info *cifs_sb = CIFS_SB(cifs_i->vfs_inode.i_sb);
+	struct cifs_tcon *tcon = cifs_sb_master_tcon(cifs_sb);
+	struct TCP_Server_Info *server = tcon->ses->server;
+	struct cifsFileInfo *cfile;
+	int rc;
+
+	/*
+	 * We need to be sure that all dirty pages are written as they
+	 * might fill holes on the server.
+	 */
+	if (!CIFS_CACHE_READ(CIFS_I(inode)) && inode->i_mapping &&
+	    inode->i_mapping->nrpages != 0) {
+		rc = filemap_fdatawait(inode->i_mapping);
+		if (rc) {
+			mapping_set_error(inode->i_mapping, rc);
+			return rc;
+		}
+	}
+
+	cfile = find_readable_file(cifs_i, false);
+	if (cfile == NULL)
+		return -EINVAL;
+
+	if (server->ops->fiemap) {
+		rc = server->ops->fiemap(tcon, cfile, fei, start, len);
+		cifsFileInfo_put(cfile);
+		return rc;
+	}
+
+	cifsFileInfo_put(cfile);
+	return -ENOTSUPP;
+}
+
 static int cifs_truncate_page(struct address_space *mapping, loff_t from)
 {
 	pgoff_t index = from >> PAGE_SHIFT;
diff --git a/fs/cifs/link.c b/fs/cifs/link.c
index 2148b0f60e5e..b736acd3917b 100644
--- a/fs/cifs/link.c
+++ b/fs/cifs/link.c
@@ -103,9 +103,9 @@ parse_mf_symlink(const u8 *buf, unsigned int buf_len, unsigned int *_link_len,
 		return rc;
 	}
 
-	snprintf(md5_str2, sizeof(md5_str2),
-		 CIFS_MF_SYMLINK_MD5_FORMAT,
-		 CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
+	scnprintf(md5_str2, sizeof(md5_str2),
+		  CIFS_MF_SYMLINK_MD5_FORMAT,
+		  CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
 
 	if (strncmp(md5_str1, md5_str2, 17) != 0)
 		return -EINVAL;
@@ -142,10 +142,10 @@ format_mf_symlink(u8 *buf, unsigned int buf_len, const char *link_str)
 		return rc;
 	}
 
-	snprintf(buf, buf_len,
-		 CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT,
-		 link_len,
-		 CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
+	scnprintf(buf, buf_len,
+		  CIFS_MF_SYMLINK_LEN_FORMAT CIFS_MF_SYMLINK_MD5_FORMAT,
+		  link_len,
+		  CIFS_MF_SYMLINK_MD5_ARGS(md5_hash));
 
 	ofs = CIFS_MF_SYMLINK_LINK_OFFSET;
 	memcpy(buf + ofs, link_str, link_len);
@@ -648,9 +648,16 @@ cifs_get_link(struct dentry *direntry, struct inode *inode,
 		rc = query_mf_symlink(xid, tcon, cifs_sb, full_path,
 				      &target_path);
 
-	if (rc != 0 && server->ops->query_symlink)
-		rc = server->ops->query_symlink(xid, tcon, full_path,
-						&target_path, cifs_sb);
+	if (rc != 0 && server->ops->query_symlink) {
+		struct cifsInodeInfo *cifsi = CIFS_I(inode);
+		bool reparse_point = false;
+
+		if (cifsi->cifsAttrs & ATTR_REPARSE)
+			reparse_point = true;
+
+		rc = server->ops->query_symlink(xid, tcon, cifs_sb, full_path,
+						&target_path, reparse_point);
+	}
 
 	kfree(full_path);
 	free_xid(xid);
diff --git a/fs/cifs/misc.c b/fs/cifs/misc.c
index bee203055b30..b1a696a73f7c 100644
--- a/fs/cifs/misc.c
+++ b/fs/cifs/misc.c
@@ -501,8 +501,7 @@ is_valid_oplock_break(char *buffer, struct TCP_Server_Info *srv)
 					   CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2,
 					   &pCifsInode->flags);
 
-				queue_work(cifsoplockd_wq,
-					   &netfile->oplock_break);
+				cifs_queue_oplock_break(netfile);
 				netfile->oplock_break_cancelled = false;
 
 				spin_unlock(&tcon->open_file_lock);
@@ -607,6 +606,28 @@ void cifs_put_writer(struct cifsInodeInfo *cinode)
 	spin_unlock(&cinode->writers_lock);
 }
 
+/**
+ * cifs_queue_oplock_break - queue the oplock break handler for cfile
+ *
+ * This function is called from the demultiplex thread when it
+ * receives an oplock break for @cfile.
+ *
+ * Assumes the tcon->open_file_lock is held.
+ * Assumes cfile->file_info_lock is NOT held.
+ */
+void cifs_queue_oplock_break(struct cifsFileInfo *cfile)
+{
+	/*
+	 * Bump the handle refcount now while we hold the
+	 * open_file_lock to enforce the validity of it for the oplock
+	 * break handler. The matching put is done at the end of the
+	 * handler.
+	 */
+	cifsFileInfo_get(cfile);
+
+	queue_work(cifsoplockd_wq, &cfile->oplock_break);
+}
+
 void cifs_done_oplock_break(struct cifsInodeInfo *cinode)
 {
 	clear_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags);
@@ -768,6 +789,11 @@ cifs_aio_ctx_alloc(void)
 {
 	struct cifs_aio_ctx *ctx;
 
+	/*
+	 * Must use kzalloc to initialize ctx->bv to NULL and ctx->direct_io
+	 * to false so that we know when we have to unreference pages within
+	 * cifs_aio_ctx_release()
+	 */
 	ctx = kzalloc(sizeof(struct cifs_aio_ctx), GFP_KERNEL);
 	if (!ctx)
 		return NULL;
@@ -786,7 +812,23 @@ cifs_aio_ctx_release(struct kref *refcount)
 					struct cifs_aio_ctx, refcount);
 
 	cifsFileInfo_put(ctx->cfile);
-	kvfree(ctx->bv);
+
+	/*
+	 * ctx->bv is only set if setup_aio_ctx_iter() was call successfuly
+	 * which means that iov_iter_get_pages() was a success and thus that
+	 * we have taken reference on pages.
+	 */
+	if (ctx->bv) {
+		unsigned i;
+
+		for (i = 0; i < ctx->npages; i++) {
+			if (ctx->should_dirty)
+				set_page_dirty(ctx->bv[i].bv_page);
+			put_page(ctx->bv[i].bv_page);
+		}
+		kvfree(ctx->bv);
+	}
+
 	kfree(ctx);
 }
 
@@ -917,7 +959,6 @@ cifs_alloc_hash(const char *name,
 	}
 
 	(*sdesc)->shash.tfm = *shash;
-	(*sdesc)->shash.flags = 0x0;
 	return 0;
 }
 
diff --git a/fs/cifs/netmisc.c b/fs/cifs/netmisc.c
index fdd908e4a26b..ed92958e842d 100644
--- a/fs/cifs/netmisc.c
+++ b/fs/cifs/netmisc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   fs/cifs/netmisc.c
  *
@@ -6,20 +7,6 @@
  *
  *   Error mapping routines from Samba libsmb/errormap.c
  *   Copyright (C) Andrew Tridgell 2001
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/net.h>
diff --git a/fs/cifs/nterr.c b/fs/cifs/nterr.c
index b6023c646123..358a766375b4 100644
--- a/fs/cifs/nterr.c
+++ b/fs/cifs/nterr.c
@@ -1,22 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Unix SMB/Netbios implementation.
  *  Version 1.9.
  *  RPC Pipe client / server routines
  *  Copyright (C) Luke Kenneth Casson Leighton 1997-2001.
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /* NT error codes - see nterr.h */
diff --git a/fs/cifs/nterr.h b/fs/cifs/nterr.h
index 7a0eae5ae7c9..edd4741cab0a 100644
--- a/fs/cifs/nterr.h
+++ b/fs/cifs/nterr.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
    Unix SMB/Netbios implementation.
    Version 1.9.
@@ -7,19 +8,6 @@
    Copyright (C) Luke Kenneth Casson Leighton 1996-2000
    Copyright (C) Paul Ashton                  1998-2000
 
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
 
diff --git a/fs/cifs/smb1ops.c b/fs/cifs/smb1ops.c
index 32a6c020478f..9e430ae9314f 100644
--- a/fs/cifs/smb1ops.c
+++ b/fs/cifs/smb1ops.c
@@ -1,20 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  SMB1 (CIFS) version specific operations
  *
  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
- *
- *  This library is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License v2 as published
- *  by the Free Software Foundation.
- *
- *  This library is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *  the GNU Lesser General Public License for more details.
- *
- *  You should have received a copy of the GNU Lesser General Public License
- *  along with this library; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/pagemap.h>
@@ -117,11 +105,11 @@ cifs_find_mid(struct TCP_Server_Info *server, char *buffer)
 }
 
 static void
-cifs_add_credits(struct TCP_Server_Info *server, const unsigned int add,
-		 const int optype)
+cifs_add_credits(struct TCP_Server_Info *server,
+		 const struct cifs_credits *credits, const int optype)
 {
 	spin_lock(&server->req_lock);
-	server->credits += add;
+	server->credits += credits->value;
 	server->in_flight--;
 	spin_unlock(&server->req_lock);
 	wake_up(&server->request_q);
@@ -308,7 +296,7 @@ coalesce_t2(char *second_buf, struct smb_hdr *target_hdr)
 	remaining = tgt_total_cnt - total_in_tgt;
 
 	if (remaining < 0) {
-		cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%hu\n",
+		cifs_dbg(FYI, "Server sent too much data. tgt_total_cnt=%hu total_in_tgt=%u\n",
 			 tgt_total_cnt, total_in_tgt);
 		return -EPROTO;
 	}
@@ -950,8 +938,8 @@ cifs_unix_dfs_readlink(const unsigned int xid, struct cifs_tcon *tcon,
 
 static int
 cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
-		   const char *full_path, char **target_path,
-		   struct cifs_sb_info *cifs_sb)
+		   struct cifs_sb_info *cifs_sb, const char *full_path,
+		   char **target_path, bool is_reparse_point)
 {
 	int rc;
 	int oplock = 0;
@@ -960,6 +948,11 @@ cifs_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 
 	cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 
+	if (is_reparse_point) {
+		cifs_dbg(VFS, "reparse points not handled for SMB1 symlinks\n");
+		return -EOPNOTSUPP;
+	}
+
 	/* Check for unix extensions */
 	if (cap_unix(tcon->ses)) {
 		rc = CIFSSMBUnixQuerySymLink(xid, tcon, full_path, target_path,
@@ -1027,6 +1020,131 @@ cifs_can_echo(struct TCP_Server_Info *server)
 	return false;
 }
 
+static int
+cifs_make_node(unsigned int xid, struct inode *inode,
+	       struct dentry *dentry, struct cifs_tcon *tcon,
+	       char *full_path, umode_t mode, dev_t dev)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	struct inode *newinode = NULL;
+	int rc = -EPERM;
+	int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
+	FILE_ALL_INFO *buf = NULL;
+	struct cifs_io_parms io_parms;
+	__u32 oplock = 0;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	unsigned int bytes_written;
+	struct win_dev *pdev;
+	struct kvec iov[2];
+
+	if (tcon->unix_ext) {
+		/*
+		 * SMB1 Unix Extensions: requires server support but
+		 * works with all special files
+		 */
+		struct cifs_unix_set_info_args args = {
+			.mode	= mode & ~current_umask(),
+			.ctime	= NO_CHANGE_64,
+			.atime	= NO_CHANGE_64,
+			.mtime	= NO_CHANGE_64,
+			.device	= dev,
+		};
+		if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_SET_UID) {
+			args.uid = current_fsuid();
+			args.gid = current_fsgid();
+		} else {
+			args.uid = INVALID_UID; /* no change */
+			args.gid = INVALID_GID; /* no change */
+		}
+		rc = CIFSSMBUnixSetPathInfo(xid, tcon, full_path, &args,
+					    cifs_sb->local_nls,
+					    cifs_remap(cifs_sb));
+		if (rc)
+			goto out;
+
+		rc = cifs_get_inode_info_unix(&newinode, full_path,
+					      inode->i_sb, xid);
+
+		if (rc == 0)
+			d_instantiate(dentry, newinode);
+		goto out;
+	}
+
+	/*
+	 * SMB1 SFU emulation: should work with all servers, but only
+	 * support block and char device (no socket & fifo)
+	 */
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
+		goto out;
+
+	if (!S_ISCHR(mode) && !S_ISBLK(mode))
+		goto out;
+
+	cifs_dbg(FYI, "sfu compat create special file\n");
+
+	buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
+	if (buf == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	if (backup_cred(cifs_sb))
+		create_options |= CREATE_OPEN_BACKUP_INTENT;
+
+	oparms.tcon = tcon;
+	oparms.cifs_sb = cifs_sb;
+	oparms.desired_access = GENERIC_WRITE;
+	oparms.create_options = create_options;
+	oparms.disposition = FILE_CREATE;
+	oparms.path = full_path;
+	oparms.fid = &fid;
+	oparms.reconnect = false;
+
+	if (tcon->ses->server->oplocks)
+		oplock = REQ_OPLOCK;
+	else
+		oplock = 0;
+	rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
+	if (rc)
+		goto out;
+
+	/*
+	 * BB Do not bother to decode buf since no local inode yet to put
+	 * timestamps in, but we can reuse it safely.
+	 */
+
+	pdev = (struct win_dev *)buf;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.offset = 0;
+	io_parms.length = sizeof(struct win_dev);
+	iov[1].iov_base = buf;
+	iov[1].iov_len = sizeof(struct win_dev);
+	if (S_ISCHR(mode)) {
+		memcpy(pdev->type, "IntxCHR", 8);
+		pdev->major = cpu_to_le64(MAJOR(dev));
+		pdev->minor = cpu_to_le64(MINOR(dev));
+		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+							&bytes_written, iov, 1);
+	} else if (S_ISBLK(mode)) {
+		memcpy(pdev->type, "IntxBLK", 8);
+		pdev->major = cpu_to_le64(MAJOR(dev));
+		pdev->minor = cpu_to_le64(MINOR(dev));
+		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+							&bytes_written, iov, 1);
+	}
+	tcon->ses->server->ops->close(xid, tcon, &fid);
+	d_drop(dentry);
+
+	/* FIXME: add code here to set EAs */
+out:
+	kfree(buf);
+	return rc;
+}
+
+
+
 struct smb_version_operations smb1_operations = {
 	.send_cancel = send_nt_cancel,
 	.compare_fids = cifs_compare_fids,
@@ -1110,6 +1228,7 @@ struct smb_version_operations smb1_operations = {
 	.get_acl_by_fid = get_cifs_acl_by_fid,
 	.set_acl = set_cifs_acl,
 #endif /* CIFS_ACL */
+	.make_node = cifs_make_node,
 };
 
 struct smb_version_values smb1_values = {
diff --git a/fs/cifs/smb2file.c b/fs/cifs/smb2file.c
index b204e84b87fb..54bffb2a1786 100644
--- a/fs/cifs/smb2file.c
+++ b/fs/cifs/smb2file.c
@@ -68,13 +68,15 @@ smb2_open_file(const unsigned int xid, struct cifs_open_parms *oparms,
 
 
 	 if (oparms->tcon->use_resilient) {
-		nr_ioctl_req.Timeout = 0; /* use server default (120 seconds) */
+		/* default timeout is 0, servers pick default (120 seconds) */
+		nr_ioctl_req.Timeout =
+			cpu_to_le32(oparms->tcon->handle_timeout);
 		nr_ioctl_req.Reserved = 0;
 		rc = SMB2_ioctl(xid, oparms->tcon, fid->persistent_fid,
 			fid->volatile_fid, FSCTL_LMR_REQUEST_RESILIENCY,
 			true /* is_fsctl */,
 			(char *)&nr_ioctl_req, sizeof(nr_ioctl_req),
-			NULL, NULL /* no return info */);
+			CIFSMaxBufSize, NULL, NULL /* no return info */);
 		if (rc == -EOPNOTSUPP) {
 			cifs_dbg(VFS,
 			     "resiliency not supported by server, disabling\n");
diff --git a/fs/cifs/smb2inode.c b/fs/cifs/smb2inode.c
index 01a76bccdb8d..278405d26c47 100644
--- a/fs/cifs/smb2inode.c
+++ b/fs/cifs/smb2inode.c
@@ -37,6 +37,16 @@
 #include "smb2pdu.h"
 #include "smb2proto.h"
 
+static void
+free_set_inf_compound(struct smb_rqst *rqst)
+{
+	if (rqst[1].rq_iov)
+		SMB2_set_info_free(&rqst[1]);
+	if (rqst[2].rq_iov)
+		SMB2_close_free(&rqst[2]);
+}
+
+
 static int
 smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 		 struct cifs_sb_info *cifs_sb, const char *full_path,
@@ -112,14 +122,18 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 					  PATH_MAX * 2, 0, NULL);
 		smb2_set_next_command(tcon, &rqst[num_rqst]);
 		smb2_set_related(&rqst[num_rqst++]);
+		trace_smb3_query_info_compound_enter(xid, ses->Suid, tcon->tid,
+						     full_path);
 		break;
 	case SMB2_OP_DELETE:
+		trace_smb3_delete_enter(xid, ses->Suid, tcon->tid, full_path);
 		break;
 	case SMB2_OP_MKDIR:
 		/*
 		 * Directories are created through parameters in the
 		 * SMB2_open() call.
 		 */
+		trace_smb3_mkdir_enter(xid, ses->Suid, tcon->tid, full_path);
 		break;
 	case SMB2_OP_RMDIR:
 		memset(&si_iov, 0, sizeof(si_iov));
@@ -135,6 +149,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 					SMB2_O_INFO_FILE, 0, data, size);
 		smb2_set_next_command(tcon, &rqst[num_rqst]);
 		smb2_set_related(&rqst[num_rqst++]);
+		trace_smb3_rmdir_enter(xid, ses->Suid, tcon->tid, full_path);
 		break;
 	case SMB2_OP_SET_EOF:
 		memset(&si_iov, 0, sizeof(si_iov));
@@ -150,6 +165,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 					SMB2_O_INFO_FILE, 0, data, size);
 		smb2_set_next_command(tcon, &rqst[num_rqst]);
 		smb2_set_related(&rqst[num_rqst++]);
+		trace_smb3_set_eof_enter(xid, ses->Suid, tcon->tid, full_path);
 		break;
 	case SMB2_OP_SET_INFO:
 		memset(&si_iov, 0, sizeof(si_iov));
@@ -166,6 +182,8 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 					SMB2_O_INFO_FILE, 0, data, size);
 		smb2_set_next_command(tcon, &rqst[num_rqst]);
 		smb2_set_related(&rqst[num_rqst++]);
+		trace_smb3_set_info_compound_enter(xid, ses->Suid, tcon->tid,
+						   full_path);
 		break;
 	case SMB2_OP_RENAME:
 		memset(&si_iov, 0, sizeof(si_iov));
@@ -190,6 +208,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 					SMB2_O_INFO_FILE, 0, data, size);
 		smb2_set_next_command(tcon, &rqst[num_rqst]);
 		smb2_set_related(&rqst[num_rqst++]);
+		trace_smb3_rename_enter(xid, ses->Suid, tcon->tid, full_path);
 		break;
 	case SMB2_OP_HARDLINK:
 		memset(&si_iov, 0, sizeof(si_iov));
@@ -214,6 +233,7 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 					SMB2_O_INFO_FILE, 0, data, size);
 		smb2_set_next_command(tcon, &rqst[num_rqst]);
 		smb2_set_related(&rqst[num_rqst++]);
+		trace_smb3_hardlink_enter(xid, ses->Suid, tcon->tid, full_path);
 		break;
 	default:
 		cifs_dbg(VFS, "Invalid command\n");
@@ -252,21 +272,65 @@ smb2_compound_op(const unsigned int xid, struct cifs_tcon *tcon,
 			SMB2_query_info_free(&rqst[1]);
 		if (rqst[2].rq_iov)
 			SMB2_close_free(&rqst[2]);
+		if (rc)
+			trace_smb3_query_info_compound_err(xid,  ses->Suid,
+						tcon->tid, rc);
+		else
+			trace_smb3_query_info_compound_done(xid, ses->Suid,
+						tcon->tid);
 		break;
 	case SMB2_OP_DELETE:
+		if (rc)
+			trace_smb3_delete_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_delete_done(xid, ses->Suid, tcon->tid);
+		if (rqst[1].rq_iov)
+			SMB2_close_free(&rqst[1]);
+		break;
 	case SMB2_OP_MKDIR:
+		if (rc)
+			trace_smb3_mkdir_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_mkdir_done(xid, ses->Suid, tcon->tid);
 		if (rqst[1].rq_iov)
 			SMB2_close_free(&rqst[1]);
 		break;
 	case SMB2_OP_HARDLINK:
+		if (rc)
+			trace_smb3_hardlink_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_hardlink_done(xid, ses->Suid, tcon->tid);
+		free_set_inf_compound(rqst);
+		break;
 	case SMB2_OP_RENAME:
+		if (rc)
+			trace_smb3_rename_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_rename_done(xid, ses->Suid, tcon->tid);
+		free_set_inf_compound(rqst);
+		break;
 	case SMB2_OP_RMDIR:
+		if (rc)
+			trace_smb3_rmdir_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_rmdir_done(xid, ses->Suid, tcon->tid);
+		free_set_inf_compound(rqst);
+		break;
 	case SMB2_OP_SET_EOF:
+		if (rc)
+			trace_smb3_set_eof_err(xid,  ses->Suid, tcon->tid, rc);
+		else
+			trace_smb3_set_eof_done(xid, ses->Suid, tcon->tid);
+		free_set_inf_compound(rqst);
+		break;
 	case SMB2_OP_SET_INFO:
-		if (rqst[1].rq_iov)
-			SMB2_set_info_free(&rqst[1]);
-		if (rqst[2].rq_iov)
-			SMB2_close_free(&rqst[2]);
+		if (rc)
+			trace_smb3_set_info_compound_err(xid,  ses->Suid,
+						tcon->tid, rc);
+		else
+			trace_smb3_set_info_compound_done(xid, ses->Suid,
+						tcon->tid);
+		free_set_inf_compound(rqst);
 		break;
 	}
 	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
@@ -309,12 +373,17 @@ smb2_query_path_info(const unsigned int xid, struct cifs_tcon *tcon,
 		rc = open_shroot(xid, tcon, &fid);
 		if (rc)
 			goto out;
-		rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
-				     fid.volatile_fid, smb2_data);
+
+		if (tcon->crfid.file_all_info_is_valid) {
+			move_smb2_info_to_cifs(data,
+					       &tcon->crfid.file_all_info);
+		} else {
+			rc = SMB2_query_info(xid, tcon, fid.persistent_fid,
+					     fid.volatile_fid, smb2_data);
+			if (!rc)
+				move_smb2_info_to_cifs(data, smb2_data);
+		}
 		close_shroot(&tcon->crfid);
-		if (rc)
-			goto out;
-		move_smb2_info_to_cifs(data, smb2_data);
 		goto out;
 	}
 
diff --git a/fs/cifs/smb2maperror.c b/fs/cifs/smb2maperror.c
index 924269cec135..82ade16c9501 100644
--- a/fs/cifs/smb2maperror.c
+++ b/fs/cifs/smb2maperror.c
@@ -457,7 +457,7 @@ static const struct status_to_posix_error smb2_error_map_table[] = {
 	{STATUS_FILE_INVALID, -EIO, "STATUS_FILE_INVALID"},
 	{STATUS_ALLOTTED_SPACE_EXCEEDED, -EIO,
 	"STATUS_ALLOTTED_SPACE_EXCEEDED"},
-	{STATUS_INSUFFICIENT_RESOURCES, -EREMOTEIO,
+	{STATUS_INSUFFICIENT_RESOURCES, -EAGAIN,
 				"STATUS_INSUFFICIENT_RESOURCES"},
 	{STATUS_DFS_EXIT_PATH_FOUND, -EIO, "STATUS_DFS_EXIT_PATH_FOUND"},
 	{STATUS_DEVICE_DATA_ERROR, -EIO, "STATUS_DEVICE_DATA_ERROR"},
@@ -1036,7 +1036,8 @@ static const struct status_to_posix_error smb2_error_map_table[] = {
 	{STATUS_UNFINISHED_CONTEXT_DELETED, -EIO,
 	"STATUS_UNFINISHED_CONTEXT_DELETED"},
 	{STATUS_NO_TGT_REPLY, -EIO, "STATUS_NO_TGT_REPLY"},
-	{STATUS_OBJECTID_NOT_FOUND, -EIO, "STATUS_OBJECTID_NOT_FOUND"},
+	/* Note that ENOATTTR and ENODATA are the same errno */
+	{STATUS_OBJECTID_NOT_FOUND, -ENODATA, "STATUS_OBJECTID_NOT_FOUND"},
 	{STATUS_NO_IP_ADDRESSES, -EIO, "STATUS_NO_IP_ADDRESSES"},
 	{STATUS_WRONG_CREDENTIAL_HANDLE, -EIO,
 	"STATUS_WRONG_CREDENTIAL_HANDLE"},
diff --git a/fs/cifs/smb2misc.c b/fs/cifs/smb2misc.c
index 7b8b58fb4d3f..e311f58dc1c8 100644
--- a/fs/cifs/smb2misc.c
+++ b/fs/cifs/smb2misc.c
@@ -517,7 +517,6 @@ smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp,
 	__u8 lease_state;
 	struct list_head *tmp;
 	struct cifsFileInfo *cfile;
-	struct TCP_Server_Info *server = tcon->ses->server;
 	struct cifs_pending_open *open;
 	struct cifsInodeInfo *cinode;
 	int ack_req = le32_to_cpu(rsp->Flags &
@@ -537,14 +536,26 @@ smb2_tcon_has_lease(struct cifs_tcon *tcon, struct smb2_lease_break *rsp,
 		cifs_dbg(FYI, "lease key match, lease break 0x%x\n",
 			 le32_to_cpu(rsp->NewLeaseState));
 
-		server->ops->set_oplock_level(cinode, lease_state, 0, NULL);
-
 		if (ack_req)
 			cfile->oplock_break_cancelled = false;
 		else
 			cfile->oplock_break_cancelled = true;
 
-		queue_work(cifsoplockd_wq, &cfile->oplock_break);
+		set_bit(CIFS_INODE_PENDING_OPLOCK_BREAK, &cinode->flags);
+
+		/*
+		 * Set or clear flags depending on the lease state being READ.
+		 * HANDLE caching flag should be added when the client starts
+		 * to defer closing remote file handles with HANDLE leases.
+		 */
+		if (lease_state & SMB2_LEASE_READ_CACHING_HE)
+			set_bit(CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2,
+				&cinode->flags);
+		else
+			clear_bit(CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2,
+				  &cinode->flags);
+
+		cifs_queue_oplock_break(cfile);
 		kfree(lw);
 		return true;
 	}
@@ -648,13 +659,6 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
 	if (rsp->sync_hdr.Command != SMB2_OPLOCK_BREAK)
 		return false;
 
-	if (rsp->sync_hdr.CreditRequest) {
-		spin_lock(&server->req_lock);
-		server->credits += le16_to_cpu(rsp->sync_hdr.CreditRequest);
-		spin_unlock(&server->req_lock);
-		wake_up(&server->request_q);
-	}
-
 	if (rsp->StructureSize !=
 				smb2_rsp_struct_sizes[SMB2_OPLOCK_BREAK_HE]) {
 		if (le16_to_cpu(rsp->StructureSize) == 44)
@@ -708,8 +712,8 @@ smb2_is_valid_oplock_break(char *buffer, struct TCP_Server_Info *server)
 					   CIFS_INODE_DOWNGRADE_OPLOCK_TO_L2,
 					   &cinode->flags);
 				spin_unlock(&cfile->file_info_lock);
-				queue_work(cifsoplockd_wq,
-					   &cfile->oplock_break);
+
+				cifs_queue_oplock_break(cfile);
 
 				spin_unlock(&tcon->open_file_lock);
 				spin_unlock(&cifs_tcp_ses_lock);
diff --git a/fs/cifs/smb2ops.c b/fs/cifs/smb2ops.c
index 6f96e2292856..9fd56b0acd7e 100644
--- a/fs/cifs/smb2ops.c
+++ b/fs/cifs/smb2ops.c
@@ -1,20 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  *  SMB2 version specific operations
  *
  *  Copyright (c) 2012, Jeff Layton <jlayton@redhat.com>
- *
- *  This library is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License v2 as published
- *  by the Free Software Foundation.
- *
- *  This library is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *  the GNU Lesser General Public License for more details.
- *
- *  You should have received a copy of the GNU Lesser General Public License
- *  along with this library; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/pagemap.h>
@@ -67,10 +55,13 @@ change_conf(struct TCP_Server_Info *server)
 }
 
 static void
-smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
-		 const int optype)
+smb2_add_credits(struct TCP_Server_Info *server,
+		 const struct cifs_credits *credits, const int optype)
 {
 	int *val, rc = -1;
+	unsigned int add = credits->value;
+	unsigned int instance = credits->instance;
+	bool reconnect_detected = false;
 
 	spin_lock(&server->req_lock);
 	val = server->ops->get_credits_field(server, optype);
@@ -79,8 +70,11 @@ smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
 	if (((optype & CIFS_OP_MASK) == CIFS_NEG_OP) && (*val != 0))
 		trace_smb3_reconnect_with_invalid_credits(server->CurrentMid,
 			server->hostname, *val);
+	if ((instance == 0) || (instance == server->reconnect_instance))
+		*val += add;
+	else
+		reconnect_detected = true;
 
-	*val += add;
 	if (*val > 65000) {
 		*val = 65000; /* Don't get near 64K credits, avoid srv bugs */
 		printk_once(KERN_WARNING "server overflowed SMB3 credits\n");
@@ -102,7 +96,12 @@ smb2_add_credits(struct TCP_Server_Info *server, const unsigned int add,
 	spin_unlock(&server->req_lock);
 	wake_up(&server->request_q);
 
-	if (server->tcpStatus == CifsNeedReconnect)
+	if (reconnect_detected)
+		cifs_dbg(FYI, "trying to put %d credits from the old server instance %d\n",
+			 add, instance);
+
+	if (server->tcpStatus == CifsNeedReconnect
+	    || server->tcpStatus == CifsExiting)
 		return;
 
 	switch (rc) {
@@ -163,7 +162,7 @@ smb2_get_credits(struct mid_q_entry *mid)
 
 static int
 smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
-		      unsigned int *num, unsigned int *credits)
+		      unsigned int *num, struct cifs_credits *credits)
 {
 	int rc = 0;
 	unsigned int scredits;
@@ -174,7 +173,7 @@ smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 			spin_unlock(&server->req_lock);
 			cifs_num_waiters_inc(server);
 			rc = wait_event_killable(server->request_q,
-					has_credits(server, &server->credits));
+				has_credits(server, &server->credits, 1));
 			cifs_num_waiters_dec(server);
 			if (rc)
 				return rc;
@@ -189,7 +188,8 @@ smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 			/* can deadlock with reopen */
 			if (scredits <= 8) {
 				*num = SMB2_MAX_BUFFER_SIZE;
-				*credits = 0;
+				credits->value = 0;
+				credits->instance = 0;
 				break;
 			}
 
@@ -198,8 +198,10 @@ smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 			*num = min_t(unsigned int, size,
 				     scredits * SMB2_MAX_BUFFER_SIZE);
 
-			*credits = DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
-			server->credits -= *credits;
+			credits->value =
+				DIV_ROUND_UP(*num, SMB2_MAX_BUFFER_SIZE);
+			credits->instance = server->reconnect_instance;
+			server->credits -= credits->value;
 			server->in_flight++;
 			break;
 		}
@@ -208,6 +210,38 @@ smb2_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
 	return rc;
 }
 
+static int
+smb2_adjust_credits(struct TCP_Server_Info *server,
+		    struct cifs_credits *credits,
+		    const unsigned int payload_size)
+{
+	int new_val = DIV_ROUND_UP(payload_size, SMB2_MAX_BUFFER_SIZE);
+
+	if (!credits->value || credits->value == new_val)
+		return 0;
+
+	if (credits->value < new_val) {
+		WARN_ONCE(1, "request has less credits (%d) than required (%d)",
+			  credits->value, new_val);
+		return -ENOTSUPP;
+	}
+
+	spin_lock(&server->req_lock);
+
+	if (server->reconnect_instance != credits->instance) {
+		spin_unlock(&server->req_lock);
+		cifs_dbg(VFS, "trying to return %d credits to old session\n",
+			 credits->value - new_val);
+		return -EAGAIN;
+	}
+
+	server->credits += credits->value - new_val;
+	spin_unlock(&server->req_lock);
+	wake_up(&server->request_q);
+	credits->value = new_val;
+	return 0;
+}
+
 static __u64
 smb2_get_next_mid(struct TCP_Server_Info *server)
 {
@@ -219,6 +253,15 @@ smb2_get_next_mid(struct TCP_Server_Info *server)
 	return mid;
 }
 
+static void
+smb2_revert_current_mid(struct TCP_Server_Info *server, const unsigned int val)
+{
+	spin_lock(&GlobalMid_Lock);
+	if (server->CurrentMid >= val)
+		server->CurrentMid -= val;
+	spin_unlock(&GlobalMid_Lock);
+}
+
 static struct mid_q_entry *
 smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 {
@@ -227,7 +270,7 @@ smb2_find_mid(struct TCP_Server_Info *server, char *buf)
 	__u64 wire_mid = le64_to_cpu(shdr->MessageId);
 
 	if (shdr->ProtocolId == SMB2_TRANSFORM_PROTO_NUM) {
-		cifs_dbg(VFS, "encrypted frame parsing not supported yet");
+		cifs_dbg(VFS, "Encrypted frame parsing not supported yet\n");
 		return NULL;
 	}
 
@@ -269,6 +312,7 @@ static int
 smb2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 {
 	int rc;
+
 	ses->server->CurrentMid = 0;
 	rc = SMB2_negotiate(xid, ses);
 	/* BB we probably don't need to retry with modern servers */
@@ -526,7 +570,7 @@ SMB3_request_interfaces(const unsigned int xid, struct cifs_tcon *tcon)
 	rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 			FSCTL_QUERY_NETWORK_INTERFACE_INFO, true /* is_fsctl */,
 			NULL /* no data input */, 0 /* no data input */,
-			(char **)&out_buf, &ret_data_len);
+			CIFSMaxBufSize, (char **)&out_buf, &ret_data_len);
 	if (rc == -EOPNOTSUPP) {
 		cifs_dbg(FYI,
 			 "server does not support query network interfaces\n");
@@ -564,6 +608,7 @@ smb2_close_cached_fid(struct kref *ref)
 		SMB2_close(0, cfid->tcon, cfid->fid->persistent_fid,
 			   cfid->fid->volatile_fid);
 		cfid->is_valid = false;
+		cfid->file_all_info_is_valid = false;
 	}
 }
 
@@ -588,9 +633,18 @@ smb2_cached_lease_break(struct work_struct *work)
  */
 int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 {
-	struct cifs_open_parms oparams;
-	int rc;
-	__le16 srch_path = 0; /* Null - since an open of top of share */
+	struct cifs_ses *ses = tcon->ses;
+	struct TCP_Server_Info *server = ses->server;
+	struct cifs_open_parms oparms;
+	struct smb2_create_rsp *o_rsp = NULL;
+	struct smb2_query_info_rsp *qi_rsp = NULL;
+	int resp_buftype[2];
+	struct smb_rqst rqst[2];
+	struct kvec rsp_iov[2];
+	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
+	struct kvec qi_iov[1];
+	int rc, flags = 0;
+	__le16 utf16_path = 0; /* Null - since an open of top of share */
 	u8 oplock = SMB2_OPLOCK_LEVEL_II;
 
 	mutex_lock(&tcon->crfid.fid_mutex);
@@ -602,22 +656,85 @@ int open_shroot(unsigned int xid, struct cifs_tcon *tcon, struct cifs_fid *pfid)
 		return 0;
 	}
 
-	oparams.tcon = tcon;
-	oparams.create_options = 0;
-	oparams.desired_access = FILE_READ_ATTRIBUTES;
-	oparams.disposition = FILE_OPEN;
-	oparams.fid = pfid;
-	oparams.reconnect = false;
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(rqst, 0, sizeof(rqst));
+	resp_buftype[0] = resp_buftype[1] = CIFS_NO_BUFFER;
+	memset(rsp_iov, 0, sizeof(rsp_iov));
+
+	/* Open */
+	memset(&open_iov, 0, sizeof(open_iov));
+	rqst[0].rq_iov = open_iov;
+	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+	oparms.tcon = tcon;
+	oparms.create_options = 0;
+	oparms.desired_access = FILE_READ_ATTRIBUTES;
+	oparms.disposition = FILE_OPEN;
+	oparms.fid = pfid;
+	oparms.reconnect = false;
+
+	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, &utf16_path);
+	if (rc)
+		goto oshr_exit;
+	smb2_set_next_command(tcon, &rqst[0]);
+
+	memset(&qi_iov, 0, sizeof(qi_iov));
+	rqst[1].rq_iov = qi_iov;
+	rqst[1].rq_nvec = 1;
 
-	rc = SMB2_open(xid, &oparams, &srch_path, &oplock, NULL, NULL, NULL);
-	if (rc == 0) {
-		memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
-		tcon->crfid.tcon = tcon;
-		tcon->crfid.is_valid = true;
-		kref_init(&tcon->crfid.refcount);
+	rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
+				  COMPOUND_FID, FILE_ALL_INFORMATION,
+				  SMB2_O_INFO_FILE, 0,
+				  sizeof(struct smb2_file_all_info) +
+				  PATH_MAX * 2, 0, NULL);
+	if (rc)
+		goto oshr_exit;
+
+	smb2_set_related(&rqst[1]);
+
+	rc = compound_send_recv(xid, ses, flags, 2, rqst,
+				resp_buftype, rsp_iov);
+	if (rc)
+		goto oshr_exit;
+
+	o_rsp = (struct smb2_create_rsp *)rsp_iov[0].iov_base;
+	oparms.fid->persistent_fid = o_rsp->PersistentFileId;
+	oparms.fid->volatile_fid = o_rsp->VolatileFileId;
+#ifdef CONFIG_CIFS_DEBUG2
+	oparms.fid->mid = le64_to_cpu(o_rsp->sync_hdr.MessageId);
+#endif /* CIFS_DEBUG2 */
+
+	memcpy(tcon->crfid.fid, pfid, sizeof(struct cifs_fid));
+	tcon->crfid.tcon = tcon;
+	tcon->crfid.is_valid = true;
+	kref_init(&tcon->crfid.refcount);
+
+	if (o_rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE) {
 		kref_get(&tcon->crfid.refcount);
-	}
+		oplock = smb2_parse_lease_state(server, o_rsp,
+						&oparms.fid->epoch,
+						oparms.fid->lease_key);
+	} else
+		goto oshr_exit;
+
+	qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
+	if (le32_to_cpu(qi_rsp->OutputBufferLength) < sizeof(struct smb2_file_all_info))
+		goto oshr_exit;
+	if (!smb2_validate_and_copy_iov(
+				le16_to_cpu(qi_rsp->OutputBufferOffset),
+				sizeof(struct smb2_file_all_info),
+				&rsp_iov[1], sizeof(struct smb2_file_all_info),
+				(char *)&tcon->crfid.file_all_info))
+		tcon->crfid.file_all_info_is_valid = 1;
+
+ oshr_exit:
 	mutex_unlock(&tcon->crfid.fid_mutex);
+	SMB2_open_free(&rqst[0]);
+	SMB2_query_info_free(&rqst[1]);
+	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
 	return rc;
 }
 
@@ -661,8 +778,6 @@ smb3_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 		SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
 	else
 		close_shroot(&tcon->crfid);
-
-	return;
 }
 
 static void
@@ -690,7 +805,6 @@ smb2_qfs_tcon(const unsigned int xid, struct cifs_tcon *tcon)
 	SMB2_QFS_attr(xid, tcon, fid.persistent_fid, fid.volatile_fid,
 			FS_DEVICE_INFORMATION);
 	SMB2_close(xid, tcon, fid.persistent_fid, fid.volatile_fid);
-	return;
 }
 
 static int
@@ -778,9 +892,8 @@ move_smb2_ea_to_cifs(char *dst, size_t dst_size,
 		value = &src->ea_data[src->ea_name_length + 1];
 		value_len = (size_t)le16_to_cpu(src->ea_value_length);
 
-		if (name_len == 0) {
+		if (name_len == 0)
 			break;
-		}
 
 		if (src_size < 8 + name_len + 1 + value_len) {
 			cifs_dbg(FYI, "EA entry goes beyond length of list\n");
@@ -940,6 +1053,16 @@ smb2_set_ea(const unsigned int xid, struct cifs_tcon *tcon,
 	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
 	memset(rsp_iov, 0, sizeof(rsp_iov));
 
+	if (ses->server->ops->query_all_EAs) {
+		if (!ea_value) {
+			rc = ses->server->ops->query_all_EAs(xid, tcon, path,
+							     ea_name, NULL, 0,
+							     cifs_sb);
+			if (rc == -ENODATA)
+				goto sea_exit;
+		}
+	}
+
 	/* Open */
 	memset(&open_iov, 0, sizeof(open_iov));
 	rqst[0].rq_iov = open_iov;
@@ -1023,6 +1146,7 @@ static void
 smb2_clear_stats(struct cifs_tcon *tcon)
 {
 	int i;
+
 	for (i = 0; i < NUMBER_OF_SMB2_COMMANDS; i++) {
 		atomic_set(&tcon->stats.smb2_stats.smb2_com_sent[i], 0);
 		atomic_set(&tcon->stats.smb2_stats.smb2_com_failed[i], 0);
@@ -1157,7 +1281,7 @@ SMB2_request_res_key(const unsigned int xid, struct cifs_tcon *tcon,
 
 	rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 			FSCTL_SRV_REQUEST_RESUME_KEY, true /* is_fsctl */,
-			NULL, 0 /* no input */,
+			NULL, 0 /* no input */, CIFSMaxBufSize,
 			(char **)&res_key, &ret_data_len);
 
 	if (rc) {
@@ -1188,7 +1312,8 @@ smb2_ioctl_query_info(const unsigned int xid,
 	struct smb_query_info __user *pqi;
 	int rc = 0;
 	int flags = 0;
-	struct smb2_query_info_rsp *rsp = NULL;
+	struct smb2_query_info_rsp *qi_rsp = NULL;
+	struct smb2_ioctl_rsp *io_rsp = NULL;
 	void *buffer = NULL;
 	struct smb_rqst rqst[3];
 	int resp_buftype[3];
@@ -1198,6 +1323,7 @@ smb2_ioctl_query_info(const unsigned int xid,
 	u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 	struct cifs_fid fid;
 	struct kvec qi_iov[1];
+	struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
 	struct kvec close_iov[1];
 
 	memset(rqst, 0, sizeof(rqst));
@@ -1242,21 +1368,62 @@ smb2_ioctl_query_info(const unsigned int xid,
 	oparms.fid = &fid;
 	oparms.reconnect = false;
 
+	/*
+	 * FSCTL codes encode the special access they need in the fsctl code.
+	 */
+	if (qi.flags & PASSTHRU_FSCTL) {
+		switch (qi.info_type & FSCTL_DEVICE_ACCESS_MASK) {
+		case FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS:
+			oparms.desired_access = FILE_READ_DATA | FILE_WRITE_DATA | FILE_READ_ATTRIBUTES | SYNCHRONIZE;
+			break;
+		case FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS:
+			oparms.desired_access = GENERIC_ALL;
+			break;
+		case FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS:
+			oparms.desired_access = GENERIC_READ;
+			break;
+		case FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS:
+			oparms.desired_access = GENERIC_WRITE;
+			break;
+		}
+	}
+
 	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, path);
 	if (rc)
 		goto iqinf_exit;
 	smb2_set_next_command(tcon, &rqst[0]);
 
 	/* Query */
-	memset(&qi_iov, 0, sizeof(qi_iov));
-	rqst[1].rq_iov = qi_iov;
-	rqst[1].rq_nvec = 1;
-
-	rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID, COMPOUND_FID,
-				  qi.file_info_class, qi.info_type,
-				  qi.additional_information,
+	if (qi.flags & PASSTHRU_FSCTL) {
+		/* Can eventually relax perm check since server enforces too */
+		if (!capable(CAP_SYS_ADMIN))
+			rc = -EPERM;
+		else  {
+			memset(&io_iov, 0, sizeof(io_iov));
+			rqst[1].rq_iov = io_iov;
+			rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
+
+			rc = SMB2_ioctl_init(tcon, &rqst[1],
+					     COMPOUND_FID, COMPOUND_FID,
+					     qi.info_type, true, buffer,
+					     qi.output_buffer_length,
+					     CIFSMaxBufSize);
+		}
+	} else if (qi.flags == PASSTHRU_QUERY_INFO) {
+		memset(&qi_iov, 0, sizeof(qi_iov));
+		rqst[1].rq_iov = qi_iov;
+		rqst[1].rq_nvec = 1;
+
+		rc = SMB2_query_info_init(tcon, &rqst[1], COMPOUND_FID,
+				  COMPOUND_FID, qi.file_info_class,
+				  qi.info_type, qi.additional_information,
 				  qi.input_buffer_length,
 				  qi.output_buffer_length, buffer);
+	} else { /* unknown flags */
+		cifs_dbg(VFS, "invalid passthru query flags: 0x%x\n", qi.flags);
+		rc = -EINVAL;
+	}
+
 	if (rc)
 		goto iqinf_exit;
 	smb2_set_next_command(tcon, &rqst[1]);
@@ -1276,24 +1443,51 @@ smb2_ioctl_query_info(const unsigned int xid,
 				resp_buftype, rsp_iov);
 	if (rc)
 		goto iqinf_exit;
-	pqi = (struct smb_query_info __user *)arg;
-	rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
-	if (le32_to_cpu(rsp->OutputBufferLength) < qi.input_buffer_length)
-		qi.input_buffer_length = le32_to_cpu(rsp->OutputBufferLength);
-	if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
-			 sizeof(qi.input_buffer_length))) {
-		rc = -EFAULT;
-		goto iqinf_exit;
-	}
-	if (copy_to_user(pqi + 1, rsp->Buffer, qi.input_buffer_length)) {
-		rc = -EFAULT;
-		goto iqinf_exit;
+	if (qi.flags & PASSTHRU_FSCTL) {
+		pqi = (struct smb_query_info __user *)arg;
+		io_rsp = (struct smb2_ioctl_rsp *)rsp_iov[1].iov_base;
+		if (le32_to_cpu(io_rsp->OutputCount) < qi.input_buffer_length)
+			qi.input_buffer_length = le32_to_cpu(io_rsp->OutputCount);
+		if (qi.input_buffer_length > 0 &&
+		    le32_to_cpu(io_rsp->OutputOffset) + qi.input_buffer_length > rsp_iov[1].iov_len) {
+			rc = -EFAULT;
+			goto iqinf_exit;
+		}
+		if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
+				 sizeof(qi.input_buffer_length))) {
+			rc = -EFAULT;
+			goto iqinf_exit;
+		}
+		if (copy_to_user((void __user *)pqi + sizeof(struct smb_query_info),
+				 (const void *)io_rsp + le32_to_cpu(io_rsp->OutputOffset),
+				 qi.input_buffer_length)) {
+			rc = -EFAULT;
+			goto iqinf_exit;
+		}
+	} else {
+		pqi = (struct smb_query_info __user *)arg;
+		qi_rsp = (struct smb2_query_info_rsp *)rsp_iov[1].iov_base;
+		if (le32_to_cpu(qi_rsp->OutputBufferLength) < qi.input_buffer_length)
+			qi.input_buffer_length = le32_to_cpu(qi_rsp->OutputBufferLength);
+		if (copy_to_user(&pqi->input_buffer_length, &qi.input_buffer_length,
+				 sizeof(qi.input_buffer_length))) {
+			rc = -EFAULT;
+			goto iqinf_exit;
+		}
+		if (copy_to_user(pqi + 1, qi_rsp->Buffer, qi.input_buffer_length)) {
+			rc = -EFAULT;
+			goto iqinf_exit;
+		}
 	}
 
  iqinf_exit:
 	kfree(buffer);
 	SMB2_open_free(&rqst[0]);
-	SMB2_query_info_free(&rqst[1]);
+	if (qi.flags & PASSTHRU_FSCTL)
+		SMB2_ioctl_free(&rqst[1]);
+	else
+		SMB2_query_info_free(&rqst[1]);
+
 	SMB2_close_free(&rqst[2]);
 	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
 	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
@@ -1321,7 +1515,7 @@ smb2_copychunk_range(const unsigned int xid,
 	if (pcchunk == NULL)
 		return -ENOMEM;
 
-	cifs_dbg(FYI, "in smb2_copychunk_range - about to call request res key\n");
+	cifs_dbg(FYI, "%s: about to call request res key\n", __func__);
 	/* Request a key from the server to identify the source of the copy */
 	rc = SMB2_request_res_key(xid, tlink_tcon(srcfile->tlink),
 				srcfile->fid.persistent_fid,
@@ -1348,8 +1542,8 @@ smb2_copychunk_range(const unsigned int xid,
 		rc = SMB2_ioctl(xid, tcon, trgtfile->fid.persistent_fid,
 			trgtfile->fid.volatile_fid, FSCTL_SRV_COPYCHUNK_WRITE,
 			true /* is_fsctl */, (char *)pcchunk,
-			sizeof(struct copychunk_ioctl),	(char **)&retbuf,
-			&ret_data_len);
+			sizeof(struct copychunk_ioctl),	CIFSMaxBufSize,
+			(char **)&retbuf, &ret_data_len);
 		if (rc == 0) {
 			if (ret_data_len !=
 					sizeof(struct copychunk_ioctl_rsp)) {
@@ -1441,6 +1635,7 @@ static unsigned int
 smb2_read_data_offset(char *buf)
 {
 	struct smb2_read_rsp *rsp = (struct smb2_read_rsp *)buf;
+
 	return rsp->DataOffset;
 }
 
@@ -1509,7 +1704,7 @@ static bool smb2_set_sparse(const unsigned int xid, struct cifs_tcon *tcon,
 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 			cfile->fid.volatile_fid, FSCTL_SET_SPARSE,
 			true /* is_fctl */,
-			&setsparse, 1, NULL, NULL);
+			&setsparse, 1, CIFSMaxBufSize, NULL, NULL);
 	if (rc) {
 		tcon->broken_sparse_sup = true;
 		cifs_dbg(FYI, "set sparse rc = %d\n", rc);
@@ -1569,7 +1764,7 @@ smb2_duplicate_extents(const unsigned int xid,
 	dup_ext_buf.SourceFileOffset = cpu_to_le64(src_off);
 	dup_ext_buf.TargetFileOffset = cpu_to_le64(dest_off);
 	dup_ext_buf.ByteCount = cpu_to_le64(len);
-	cifs_dbg(FYI, "duplicate extents: src off %lld dst off %lld len %lld",
+	cifs_dbg(FYI, "Duplicate extents: src off %lld dst off %lld len %lld\n",
 		src_off, dest_off, len);
 
 	rc = smb2_set_file_size(xid, tcon, trgtfile, dest_off + len, false);
@@ -1582,11 +1777,11 @@ smb2_duplicate_extents(const unsigned int xid,
 			true /* is_fsctl */,
 			(char *)&dup_ext_buf,
 			sizeof(struct duplicate_extents_to_file),
-			NULL,
+			CIFSMaxBufSize, NULL,
 			&ret_data_len);
 
 	if (ret_data_len > 0)
-		cifs_dbg(FYI, "non-zero response length in duplicate extents");
+		cifs_dbg(FYI, "Non-zero response length in duplicate extents\n");
 
 duplicate_extents_out:
 	return rc;
@@ -1617,7 +1812,7 @@ smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 			true /* is_fsctl */,
 			(char *)&integr_info,
 			sizeof(struct fsctl_set_integrity_information_req),
-			NULL,
+			CIFSMaxBufSize, NULL,
 			&ret_data_len);
 
 }
@@ -1625,6 +1820,8 @@ smb3_set_integrity(const unsigned int xid, struct cifs_tcon *tcon,
 /* GMT Token is @GMT-YYYY.MM.DD-HH.MM.SS Unicode which is 48 bytes + null */
 #define GMT_TOKEN_SIZE 50
 
+#define MIN_SNAPSHOT_ARRAY_SIZE 16 /* See MS-SMB2 section 3.3.5.15.1 */
+
 /*
  * Input buffer contains (empty) struct smb_snapshot array with size filled in
  * For output see struct SRV_SNAPSHOT_ARRAY in MS-SMB2 section 2.2.32.2
@@ -1636,13 +1833,37 @@ smb3_enum_snapshots(const unsigned int xid, struct cifs_tcon *tcon,
 	char *retbuf = NULL;
 	unsigned int ret_data_len = 0;
 	int rc;
+	u32 max_response_size;
 	struct smb_snapshot_array snapshot_in;
 
+	/*
+	 * On the first query to enumerate the list of snapshots available
+	 * for this volume the buffer begins with 0 (number of snapshots
+	 * which can be returned is zero since at that point we do not know
+	 * how big the buffer needs to be). On the second query,
+	 * it (ret_data_len) is set to number of snapshots so we can
+	 * know to set the maximum response size larger (see below).
+	 */
+	if (get_user(ret_data_len, (unsigned int __user *)ioc_buf))
+		return -EFAULT;
+
+	/*
+	 * Note that for snapshot queries that servers like Azure expect that
+	 * the first query be minimal size (and just used to get the number/size
+	 * of previous versions) so response size must be specified as EXACTLY
+	 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
+	 * of eight bytes.
+	 */
+	if (ret_data_len == 0)
+		max_response_size = MIN_SNAPSHOT_ARRAY_SIZE;
+	else
+		max_response_size = CIFSMaxBufSize;
+
 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 			cfile->fid.volatile_fid,
 			FSCTL_SRV_ENUMERATE_SNAPSHOTS,
 			true /* is_fsctl */,
-			NULL, 0 /* no input data */,
+			NULL, 0 /* no input data */, max_response_size,
 			(char **)&retbuf,
 			&ret_data_len);
 	cifs_dbg(FYI, "enum snaphots ioctl returned %d and ret buflen is %d\n",
@@ -1749,18 +1970,18 @@ smb2_close_dir(const unsigned int xid, struct cifs_tcon *tcon,
 }
 
 /*
-* If we negotiate SMB2 protocol and get STATUS_PENDING - update
-* the number of credits and return true. Otherwise - return false.
-*/
+ * If we negotiate SMB2 protocol and get STATUS_PENDING - update
+ * the number of credits and return true. Otherwise - return false.
+ */
 static bool
-smb2_is_status_pending(char *buf, struct TCP_Server_Info *server, int length)
+smb2_is_status_pending(char *buf, struct TCP_Server_Info *server)
 {
 	struct smb2_sync_hdr *shdr = (struct smb2_sync_hdr *)buf;
 
 	if (shdr->Status != STATUS_PENDING)
 		return false;
 
-	if (!length) {
+	if (shdr->CreditRequest) {
 		spin_lock(&server->req_lock);
 		server->credits += le16_to_cpu(shdr->CreditRequest);
 		spin_unlock(&server->req_lock);
@@ -2072,7 +2293,7 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
 	struct get_dfs_referral_rsp *dfs_rsp = NULL;
 	u32 dfs_req_size = 0, dfs_rsp_size = 0;
 
-	cifs_dbg(FYI, "smb2_get_dfs_refer path <%s>\n", search_name);
+	cifs_dbg(FYI, "%s: path: %s\n", __func__, search_name);
 
 	/*
 	 * Try to use the IPC tcon, otherwise just use any
@@ -2120,13 +2341,13 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
 		rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 				FSCTL_DFS_GET_REFERRALS,
 				true /* is_fsctl */,
-				(char *)dfs_req, dfs_req_size,
+				(char *)dfs_req, dfs_req_size, CIFSMaxBufSize,
 				(char **)&dfs_rsp, &dfs_rsp_size);
 	} while (rc == -EAGAIN);
 
 	if (rc) {
 		if ((rc != -ENOENT) && (rc != -EOPNOTSUPP))
-			cifs_dbg(VFS, "ioctl error in smb2_get_dfs_refer rc=%d\n", rc);
+			cifs_dbg(VFS, "ioctl error in %s rc=%d\n", __func__, rc);
 		goto out;
 	}
 
@@ -2135,7 +2356,7 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
 				 nls_codepage, remap, search_name,
 				 true /* is_unicode */);
 	if (rc) {
-		cifs_dbg(VFS, "parse error in smb2_get_dfs_refer rc=%d\n", rc);
+		cifs_dbg(VFS, "parse error in %s rc=%d\n", __func__, rc);
 		goto out;
 	}
 
@@ -2151,49 +2372,190 @@ smb2_get_dfs_refer(const unsigned int xid, struct cifs_ses *ses,
 	kfree(dfs_rsp);
 	return rc;
 }
+
+static int
+parse_reparse_symlink(struct reparse_symlink_data_buffer *symlink_buf,
+		      u32 plen, char **target_path,
+		      struct cifs_sb_info *cifs_sb)
+{
+	unsigned int sub_len;
+	unsigned int sub_offset;
+
+	/* We only handle Symbolic Link : MS-FSCC 2.1.2.4 */
+	if (le32_to_cpu(symlink_buf->ReparseTag) != IO_REPARSE_TAG_SYMLINK) {
+		cifs_dbg(VFS, "srv returned invalid symlink buffer\n");
+		return -EIO;
+	}
+
+	sub_offset = le16_to_cpu(symlink_buf->SubstituteNameOffset);
+	sub_len = le16_to_cpu(symlink_buf->SubstituteNameLength);
+	if (sub_offset + 20 > plen ||
+	    sub_offset + sub_len + 20 > plen) {
+		cifs_dbg(VFS, "srv returned malformed symlink buffer\n");
+		return -EIO;
+	}
+
+	*target_path = cifs_strndup_from_utf16(
+				symlink_buf->PathBuffer + sub_offset,
+				sub_len, true, cifs_sb->local_nls);
+	if (!(*target_path))
+		return -ENOMEM;
+
+	convert_delimiter(*target_path, '/');
+	cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
+
+	return 0;
+}
+
 #define SMB2_SYMLINK_STRUCT_SIZE \
 	(sizeof(struct smb2_err_rsp) - 1 + sizeof(struct smb2_symlink_err_rsp))
 
 static int
 smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
-		   const char *full_path, char **target_path,
-		   struct cifs_sb_info *cifs_sb)
+		   struct cifs_sb_info *cifs_sb, const char *full_path,
+		   char **target_path, bool is_reparse_point)
 {
 	int rc;
-	__le16 *utf16_path;
+	__le16 *utf16_path = NULL;
 	__u8 oplock = SMB2_OPLOCK_LEVEL_NONE;
 	struct cifs_open_parms oparms;
 	struct cifs_fid fid;
 	struct kvec err_iov = {NULL, 0};
 	struct smb2_err_rsp *err_buf = NULL;
-	int resp_buftype;
 	struct smb2_symlink_err_rsp *symlink;
 	unsigned int sub_len;
 	unsigned int sub_offset;
 	unsigned int print_len;
 	unsigned int print_offset;
+	int flags = 0;
+	struct smb_rqst rqst[3];
+	int resp_buftype[3];
+	struct kvec rsp_iov[3];
+	struct kvec open_iov[SMB2_CREATE_IOV_SIZE];
+	struct kvec io_iov[SMB2_IOCTL_IOV_SIZE];
+	struct kvec close_iov[1];
+	struct smb2_create_rsp *create_rsp;
+	struct smb2_ioctl_rsp *ioctl_rsp;
+	struct reparse_data_buffer *reparse_buf;
+	u32 plen;
 
 	cifs_dbg(FYI, "%s: path: %s\n", __func__, full_path);
 
+	*target_path = NULL;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
+	memset(rqst, 0, sizeof(rqst));
+	resp_buftype[0] = resp_buftype[1] = resp_buftype[2] = CIFS_NO_BUFFER;
+	memset(rsp_iov, 0, sizeof(rsp_iov));
+
 	utf16_path = cifs_convert_path_to_utf16(full_path, cifs_sb);
 	if (!utf16_path)
 		return -ENOMEM;
 
+	/* Open */
+	memset(&open_iov, 0, sizeof(open_iov));
+	rqst[0].rq_iov = open_iov;
+	rqst[0].rq_nvec = SMB2_CREATE_IOV_SIZE;
+
+	memset(&oparms, 0, sizeof(oparms));
 	oparms.tcon = tcon;
 	oparms.desired_access = FILE_READ_ATTRIBUTES;
 	oparms.disposition = FILE_OPEN;
+
 	if (backup_cred(cifs_sb))
 		oparms.create_options = CREATE_OPEN_BACKUP_INTENT;
 	else
 		oparms.create_options = 0;
+	if (is_reparse_point)
+		oparms.create_options = OPEN_REPARSE_POINT;
+
 	oparms.fid = &fid;
 	oparms.reconnect = false;
 
-	rc = SMB2_open(xid, &oparms, utf16_path, &oplock, NULL, &err_iov,
-		       &resp_buftype);
+	rc = SMB2_open_init(tcon, &rqst[0], &oplock, &oparms, utf16_path);
+	if (rc)
+		goto querty_exit;
+	smb2_set_next_command(tcon, &rqst[0]);
+
+
+	/* IOCTL */
+	memset(&io_iov, 0, sizeof(io_iov));
+	rqst[1].rq_iov = io_iov;
+	rqst[1].rq_nvec = SMB2_IOCTL_IOV_SIZE;
+
+	rc = SMB2_ioctl_init(tcon, &rqst[1], fid.persistent_fid,
+			     fid.volatile_fid, FSCTL_GET_REPARSE_POINT,
+			     true /* is_fctl */, NULL, 0, CIFSMaxBufSize);
+	if (rc)
+		goto querty_exit;
+
+	smb2_set_next_command(tcon, &rqst[1]);
+	smb2_set_related(&rqst[1]);
+
+
+	/* Close */
+	memset(&close_iov, 0, sizeof(close_iov));
+	rqst[2].rq_iov = close_iov;
+	rqst[2].rq_nvec = 1;
+
+	rc = SMB2_close_init(tcon, &rqst[2], COMPOUND_FID, COMPOUND_FID);
+	if (rc)
+		goto querty_exit;
+
+	smb2_set_related(&rqst[2]);
+
+	rc = compound_send_recv(xid, tcon->ses, flags, 3, rqst,
+				resp_buftype, rsp_iov);
+
+	create_rsp = rsp_iov[0].iov_base;
+	if (create_rsp && create_rsp->sync_hdr.Status)
+		err_iov = rsp_iov[0];
+	ioctl_rsp = rsp_iov[1].iov_base;
+
+	/*
+	 * Open was successful and we got an ioctl response.
+	 */
+	if ((rc == 0) && (is_reparse_point)) {
+		/* See MS-FSCC 2.3.23 */
+
+		reparse_buf = (struct reparse_data_buffer *)
+			((char *)ioctl_rsp +
+			 le32_to_cpu(ioctl_rsp->OutputOffset));
+		plen = le32_to_cpu(ioctl_rsp->OutputCount);
+
+		if (plen + le32_to_cpu(ioctl_rsp->OutputOffset) >
+		    rsp_iov[1].iov_len) {
+			cifs_dbg(VFS, "srv returned invalid ioctl len: %d\n",
+				 plen);
+			rc = -EIO;
+			goto querty_exit;
+		}
+
+		if (plen < 8) {
+			cifs_dbg(VFS, "reparse buffer is too small. Must be "
+				 "at least 8 bytes but was %d\n", plen);
+			rc = -EIO;
+			goto querty_exit;
+		}
+
+		if (plen < le16_to_cpu(reparse_buf->ReparseDataLength) + 8) {
+			cifs_dbg(VFS, "srv returned invalid reparse buf "
+				 "length: %d\n", plen);
+			rc = -EIO;
+			goto querty_exit;
+		}
+
+		rc = parse_reparse_symlink(
+			(struct reparse_symlink_data_buffer *)reparse_buf,
+			plen, target_path, cifs_sb);
+		goto querty_exit;
+	}
+
 	if (!rc || !err_iov.iov_base) {
 		rc = -ENOENT;
-		goto free_path;
+		goto querty_exit;
 	}
 
 	err_buf = err_iov.iov_base;
@@ -2233,9 +2595,14 @@ smb2_query_symlink(const unsigned int xid, struct cifs_tcon *tcon,
 	cifs_dbg(FYI, "%s: target path: %s\n", __func__, *target_path);
 
  querty_exit:
-	free_rsp_buf(resp_buftype, err_buf);
- free_path:
+	cifs_dbg(FYI, "query symlink rc %d\n", rc);
 	kfree(utf16_path);
+	SMB2_open_free(&rqst[0]);
+	SMB2_ioctl_free(&rqst[1]);
+	SMB2_close_free(&rqst[2]);
+	free_rsp_buf(resp_buftype[0], rsp_iov[0].iov_base);
+	free_rsp_buf(resp_buftype[1], rsp_iov[1].iov_base);
+	free_rsp_buf(resp_buftype[2], rsp_iov[2].iov_base);
 	return rc;
 }
 
@@ -2407,59 +2774,64 @@ get_smb2_acl(struct cifs_sb_info *cifs_sb,
 static long smb3_zero_range(struct file *file, struct cifs_tcon *tcon,
 			    loff_t offset, loff_t len, bool keep_size)
 {
+	struct cifs_ses *ses = tcon->ses;
 	struct inode *inode;
 	struct cifsInodeInfo *cifsi;
 	struct cifsFileInfo *cfile = file->private_data;
 	struct file_zero_data_information fsctl_buf;
 	long rc;
 	unsigned int xid;
+	__le64 eof;
 
 	xid = get_xid();
 
 	inode = d_inode(cfile->dentry);
 	cifsi = CIFS_I(inode);
 
+	trace_smb3_zero_enter(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len);
+
+
 	/* if file not oplocked can't be sure whether asking to extend size */
 	if (!CIFS_CACHE_READ(cifsi))
 		if (keep_size == false) {
 			rc = -EOPNOTSUPP;
+			trace_smb3_zero_err(xid, cfile->fid.persistent_fid,
+				tcon->tid, ses->Suid, offset, len, rc);
 			free_xid(xid);
 			return rc;
 		}
 
-	/*
-	 * Must check if file sparse since fallocate -z (zero range) assumes
-	 * non-sparse allocation
-	 */
-	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
-		rc = -EOPNOTSUPP;
-		free_xid(xid);
-		return rc;
-	}
-
-	/*
-	 * need to make sure we are not asked to extend the file since the SMB3
-	 * fsctl does not change the file size. In the future we could change
-	 * this to zero the first part of the range then set the file size
-	 * which for a non sparse file would zero the newly extended range
-	 */
-	if (keep_size == false)
-		if (i_size_read(inode) < offset + len) {
-			rc = -EOPNOTSUPP;
-			free_xid(xid);
-			return rc;
-		}
-
-	cifs_dbg(FYI, "offset %lld len %lld", offset, len);
+	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
 
 	fsctl_buf.FileOffset = cpu_to_le64(offset);
 	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
 
 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
-			cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
-			true /* is_fctl */, (char *)&fsctl_buf,
-			sizeof(struct file_zero_data_information), NULL, NULL);
+			cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA, true,
+			(char *)&fsctl_buf,
+			sizeof(struct file_zero_data_information),
+			0, NULL, NULL);
+	if (rc)
+		goto zero_range_exit;
+
+	/*
+	 * do we also need to change the size of the file?
+	 */
+	if (keep_size == false && i_size_read(inode) < offset + len) {
+		eof = cpu_to_le64(offset + len);
+		rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
+				  cfile->fid.volatile_fid, cfile->pid, &eof);
+	}
+
+ zero_range_exit:
 	free_xid(xid);
+	if (rc)
+		trace_smb3_zero_err(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len, rc);
+	else
+		trace_smb3_zero_done(xid, cfile->fid.persistent_fid, tcon->tid,
+			      ses->Suid, offset, len);
 	return rc;
 }
 
@@ -2487,7 +2859,7 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
 		return rc;
 	}
 
-	cifs_dbg(FYI, "offset %lld len %lld", offset, len);
+	cifs_dbg(FYI, "Offset %lld len %lld\n", offset, len);
 
 	fsctl_buf.FileOffset = cpu_to_le64(offset);
 	fsctl_buf.BeyondFinalZero = cpu_to_le64(offset + len);
@@ -2495,7 +2867,8 @@ static long smb3_punch_hole(struct file *file, struct cifs_tcon *tcon,
 	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
 			cfile->fid.volatile_fid, FSCTL_SET_ZERO_DATA,
 			true /* is_fctl */, (char *)&fsctl_buf,
-			sizeof(struct file_zero_data_information), NULL, NULL);
+			sizeof(struct file_zero_data_information),
+			CIFSMaxBufSize, NULL, NULL);
 	free_xid(xid);
 	return rc;
 }
@@ -2508,15 +2881,20 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
 	struct cifsFileInfo *cfile = file->private_data;
 	long rc = -EOPNOTSUPP;
 	unsigned int xid;
+	__le64 eof;
 
 	xid = get_xid();
 
 	inode = d_inode(cfile->dentry);
 	cifsi = CIFS_I(inode);
 
+	trace_smb3_falloc_enter(xid, cfile->fid.persistent_fid, tcon->tid,
+				tcon->ses->Suid, off, len);
 	/* if file not oplocked can't be sure whether asking to extend size */
 	if (!CIFS_CACHE_READ(cifsi))
 		if (keep_size == false) {
+			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
+				tcon->tid, tcon->ses->Suid, off, len, rc);
 			free_xid(xid);
 			return rc;
 		}
@@ -2536,6 +2914,12 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
 		/* BB: in future add else clause to extend file */
 		else
 			rc = -EOPNOTSUPP;
+		if (rc)
+			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
+				tcon->tid, tcon->ses->Suid, off, len, rc);
+		else
+			trace_smb3_falloc_done(xid, cfile->fid.persistent_fid,
+				tcon->tid, tcon->ses->Suid, off, len);
 		free_xid(xid);
 		return rc;
 	}
@@ -2551,19 +2935,193 @@ static long smb3_simple_falloc(struct file *file, struct cifs_tcon *tcon,
 		 */
 		if ((off > 8192) || (off + len + 8192 < i_size_read(inode))) {
 			rc = -EOPNOTSUPP;
+			trace_smb3_falloc_err(xid, cfile->fid.persistent_fid,
+				tcon->tid, tcon->ses->Suid, off, len, rc);
 			free_xid(xid);
 			return rc;
 		}
 
-		rc = smb2_set_sparse(xid, tcon, cfile, inode, false);
+		smb2_set_sparse(xid, tcon, cfile, inode, false);
+		rc = 0;
+	} else {
+		smb2_set_sparse(xid, tcon, cfile, inode, false);
+		rc = 0;
+		if (i_size_read(inode) < off + len) {
+			eof = cpu_to_le64(off + len);
+			rc = SMB2_set_eof(xid, tcon, cfile->fid.persistent_fid,
+					  cfile->fid.volatile_fid, cfile->pid,
+					  &eof);
+		}
 	}
-	/* BB: else ... in future add code to extend file and set sparse */
 
+	if (rc)
+		trace_smb3_falloc_err(xid, cfile->fid.persistent_fid, tcon->tid,
+				tcon->ses->Suid, off, len, rc);
+	else
+		trace_smb3_falloc_done(xid, cfile->fid.persistent_fid, tcon->tid,
+				tcon->ses->Suid, off, len);
 
 	free_xid(xid);
 	return rc;
 }
 
+static loff_t smb3_llseek(struct file *file, struct cifs_tcon *tcon, loff_t offset, int whence)
+{
+	struct cifsFileInfo *wrcfile, *cfile = file->private_data;
+	struct cifsInodeInfo *cifsi;
+	struct inode *inode;
+	int rc = 0;
+	struct file_allocated_range_buffer in_data, *out_data = NULL;
+	u32 out_data_len;
+	unsigned int xid;
+
+	if (whence != SEEK_HOLE && whence != SEEK_DATA)
+		return generic_file_llseek(file, offset, whence);
+
+	inode = d_inode(cfile->dentry);
+	cifsi = CIFS_I(inode);
+
+	if (offset < 0 || offset >= i_size_read(inode))
+		return -ENXIO;
+
+	xid = get_xid();
+	/*
+	 * We need to be sure that all dirty pages are written as they
+	 * might fill holes on the server.
+	 * Note that we also MUST flush any written pages since at least
+	 * some servers (Windows2016) will not reflect recent writes in
+	 * QUERY_ALLOCATED_RANGES until SMB2_flush is called.
+	 */
+	wrcfile = find_writable_file(cifsi, false);
+	if (wrcfile) {
+		filemap_write_and_wait(inode->i_mapping);
+		smb2_flush_file(xid, tcon, &wrcfile->fid);
+		cifsFileInfo_put(wrcfile);
+	}
+
+	if (!(cifsi->cifsAttrs & FILE_ATTRIBUTE_SPARSE_FILE)) {
+		if (whence == SEEK_HOLE)
+			offset = i_size_read(inode);
+		goto lseek_exit;
+	}
+
+	in_data.file_offset = cpu_to_le64(offset);
+	in_data.length = cpu_to_le64(i_size_read(inode));
+
+	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			cfile->fid.volatile_fid,
+			FSCTL_QUERY_ALLOCATED_RANGES, true,
+			(char *)&in_data, sizeof(in_data),
+			sizeof(struct file_allocated_range_buffer),
+			(char **)&out_data, &out_data_len);
+	if (rc == -E2BIG)
+		rc = 0;
+	if (rc)
+		goto lseek_exit;
+
+	if (whence == SEEK_HOLE && out_data_len == 0)
+		goto lseek_exit;
+
+	if (whence == SEEK_DATA && out_data_len == 0) {
+		rc = -ENXIO;
+		goto lseek_exit;
+	}
+
+	if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
+		rc = -EINVAL;
+		goto lseek_exit;
+	}
+	if (whence == SEEK_DATA) {
+		offset = le64_to_cpu(out_data->file_offset);
+		goto lseek_exit;
+	}
+	if (offset < le64_to_cpu(out_data->file_offset))
+		goto lseek_exit;
+
+	offset = le64_to_cpu(out_data->file_offset) + le64_to_cpu(out_data->length);
+
+ lseek_exit:
+	free_xid(xid);
+	kfree(out_data);
+	if (!rc)
+		return vfs_setpos(file, offset, inode->i_sb->s_maxbytes);
+	else
+		return rc;
+}
+
+static int smb3_fiemap(struct cifs_tcon *tcon,
+		       struct cifsFileInfo *cfile,
+		       struct fiemap_extent_info *fei, u64 start, u64 len)
+{
+	unsigned int xid;
+	struct file_allocated_range_buffer in_data, *out_data;
+	u32 out_data_len;
+	int i, num, rc, flags, last_blob;
+	u64 next;
+
+	if (fiemap_check_flags(fei, FIEMAP_FLAG_SYNC))
+		return -EBADR;
+
+	xid = get_xid();
+ again:
+	in_data.file_offset = cpu_to_le64(start);
+	in_data.length = cpu_to_le64(len);
+
+	rc = SMB2_ioctl(xid, tcon, cfile->fid.persistent_fid,
+			cfile->fid.volatile_fid,
+			FSCTL_QUERY_ALLOCATED_RANGES, true,
+			(char *)&in_data, sizeof(in_data),
+			1024 * sizeof(struct file_allocated_range_buffer),
+			(char **)&out_data, &out_data_len);
+	if (rc == -E2BIG) {
+		last_blob = 0;
+		rc = 0;
+	} else
+		last_blob = 1;
+	if (rc)
+		goto out;
+
+	if (out_data_len < sizeof(struct file_allocated_range_buffer)) {
+		rc = -EINVAL;
+		goto out;
+	}
+	if (out_data_len % sizeof(struct file_allocated_range_buffer)) {
+		rc = -EINVAL;
+		goto out;
+	}
+
+	num = out_data_len / sizeof(struct file_allocated_range_buffer);
+	for (i = 0; i < num; i++) {
+		flags = 0;
+		if (i == num - 1 && last_blob)
+			flags |= FIEMAP_EXTENT_LAST;
+
+		rc = fiemap_fill_next_extent(fei,
+				le64_to_cpu(out_data[i].file_offset),
+				le64_to_cpu(out_data[i].file_offset),
+				le64_to_cpu(out_data[i].length),
+				flags);
+		if (rc < 0)
+			goto out;
+		if (rc == 1) {
+			rc = 0;
+			goto out;
+		}
+	}
+
+	if (!last_blob) {
+		next = le64_to_cpu(out_data[num - 1].file_offset) +
+		  le64_to_cpu(out_data[num - 1].length);
+		len = len - (next - start);
+		start = next;
+		goto again;
+	}
+
+ out:
+	free_xid(xid);
+	kfree(out_data);
+	return rc;
+}
 
 static long smb3_fallocate(struct file *file, struct cifs_tcon *tcon, int mode,
 			   loff_t off, loff_t len)
@@ -2595,6 +3153,15 @@ smb2_downgrade_oplock(struct TCP_Server_Info *server,
 }
 
 static void
+smb21_downgrade_oplock(struct TCP_Server_Info *server,
+		       struct cifsInodeInfo *cinode, bool set_level2)
+{
+	server->ops->set_oplock_level(cinode,
+				      set_level2 ? SMB2_LEASE_READ_CACHING_HE :
+				      0, 0, NULL);
+}
+
+static void
 smb2_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 		      unsigned int epoch, bool *purge_cache)
 {
@@ -2622,26 +3189,28 @@ smb21_set_oplock_level(struct cifsInodeInfo *cinode, __u32 oplock,
 		       unsigned int epoch, bool *purge_cache)
 {
 	char message[5] = {0};
+	unsigned int new_oplock = 0;
 
 	oplock &= 0xFF;
 	if (oplock == SMB2_OPLOCK_LEVEL_NOCHANGE)
 		return;
 
-	cinode->oplock = 0;
 	if (oplock & SMB2_LEASE_READ_CACHING_HE) {
-		cinode->oplock |= CIFS_CACHE_READ_FLG;
+		new_oplock |= CIFS_CACHE_READ_FLG;
 		strcat(message, "R");
 	}
 	if (oplock & SMB2_LEASE_HANDLE_CACHING_HE) {
-		cinode->oplock |= CIFS_CACHE_HANDLE_FLG;
+		new_oplock |= CIFS_CACHE_HANDLE_FLG;
 		strcat(message, "H");
 	}
 	if (oplock & SMB2_LEASE_WRITE_CACHING_HE) {
-		cinode->oplock |= CIFS_CACHE_WRITE_FLG;
+		new_oplock |= CIFS_CACHE_WRITE_FLG;
 		strcat(message, "W");
 	}
-	if (!cinode->oplock)
-		strcat(message, "None");
+	if (!new_oplock)
+		strncpy(message, "None", sizeof(message));
+
+	cinode->oplock = new_oplock;
 	cifs_dbg(FYI, "%s Lease granted on inode %p\n", message,
 		 &cinode->vfs_inode);
 }
@@ -2942,7 +3511,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
 
 	req = aead_request_alloc(tfm, GFP_KERNEL);
 	if (!req) {
-		cifs_dbg(VFS, "%s: Failed to alloc aead request", __func__);
+		cifs_dbg(VFS, "%s: Failed to alloc aead request\n", __func__);
 		return -ENOMEM;
 	}
 
@@ -2953,7 +3522,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
 
 	sg = init_sg(num_rqst, rqst, sign);
 	if (!sg) {
-		cifs_dbg(VFS, "%s: Failed to init sg", __func__);
+		cifs_dbg(VFS, "%s: Failed to init sg\n", __func__);
 		rc = -ENOMEM;
 		goto free_req;
 	}
@@ -2961,7 +3530,7 @@ crypt_message(struct TCP_Server_Info *server, int num_rqst,
 	iv_len = crypto_aead_ivsize(tfm);
 	iv = kzalloc(iv_len, GFP_KERNEL);
 	if (!iv) {
-		cifs_dbg(VFS, "%s: Failed to alloc IV", __func__);
+		cifs_dbg(VFS, "%s: Failed to alloc iv\n", __func__);
 		rc = -ENOMEM;
 		goto free_sg;
 	}
@@ -3069,7 +3638,7 @@ smb3_init_transform_rq(struct TCP_Server_Info *server, int num_rqst,
 	fill_transform_hdr(tr_hdr, orig_len, old_rq);
 
 	rc = crypt_message(server, num_rqst, new_rq, 1);
-	cifs_dbg(FYI, "encrypt message returned %d", rc);
+	cifs_dbg(FYI, "Encrypt message returned %d\n", rc);
 	if (rc)
 		goto err_free;
 
@@ -3110,7 +3679,7 @@ decrypt_raw_data(struct TCP_Server_Info *server, char *buf,
 	rqst.rq_tailsz = (page_data_size % PAGE_SIZE) ? : PAGE_SIZE;
 
 	rc = crypt_message(server, 1, &rqst, 0);
-	cifs_dbg(FYI, "decrypt message returned %d\n", rc);
+	cifs_dbg(FYI, "Decrypt message returned %d\n", rc);
 
 	if (rc)
 		return rc;
@@ -3210,15 +3779,15 @@ handle_read_data(struct TCP_Server_Info *server, struct mid_q_entry *mid,
 	}
 
 	if (server->ops->is_status_pending &&
-			server->ops->is_status_pending(buf, server, 0))
+			server->ops->is_status_pending(buf, server))
 		return -1;
 
 	/* set up first two iov to get credits */
 	rdata->iov[0].iov_base = buf;
-	rdata->iov[0].iov_len = 4;
-	rdata->iov[1].iov_base = buf + 4;
+	rdata->iov[0].iov_len = 0;
+	rdata->iov[1].iov_base = buf;
 	rdata->iov[1].iov_len =
-		min_t(unsigned int, buf_len, server->vals->read_rsp_size) - 4;
+		min_t(unsigned int, buf_len, server->vals->read_rsp_size);
 	cifs_dbg(FYI, "0: iov_base=%p iov_len=%zu\n",
 		 rdata->iov[0].iov_base, rdata->iov[0].iov_len);
 	cifs_dbg(FYI, "1: iov_base=%p iov_len=%zu\n",
@@ -3530,6 +4099,104 @@ smb2_next_header(char *buf)
 	return le32_to_cpu(hdr->NextCommand);
 }
 
+static int
+smb2_make_node(unsigned int xid, struct inode *inode,
+	       struct dentry *dentry, struct cifs_tcon *tcon,
+	       char *full_path, umode_t mode, dev_t dev)
+{
+	struct cifs_sb_info *cifs_sb = CIFS_SB(inode->i_sb);
+	int rc = -EPERM;
+	int create_options = CREATE_NOT_DIR | CREATE_OPTION_SPECIAL;
+	FILE_ALL_INFO *buf = NULL;
+	struct cifs_io_parms io_parms;
+	__u32 oplock = 0;
+	struct cifs_fid fid;
+	struct cifs_open_parms oparms;
+	unsigned int bytes_written;
+	struct win_dev *pdev;
+	struct kvec iov[2];
+
+	/*
+	 * Check if mounted with mount parm 'sfu' mount parm.
+	 * SFU emulation should work with all servers, but only
+	 * supports block and char device (no socket & fifo),
+	 * and was used by default in earlier versions of Windows
+	 */
+	if (!(cifs_sb->mnt_cifs_flags & CIFS_MOUNT_UNX_EMUL))
+		goto out;
+
+	/*
+	 * TODO: Add ability to create instead via reparse point. Windows (e.g.
+	 * their current NFS server) uses this approach to expose special files
+	 * over SMB2/SMB3 and Samba will do this with SMB3.1.1 POSIX Extensions
+	 */
+
+	if (!S_ISCHR(mode) && !S_ISBLK(mode))
+		goto out;
+
+	cifs_dbg(FYI, "sfu compat create special file\n");
+
+	buf = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL);
+	if (buf == NULL) {
+		rc = -ENOMEM;
+		goto out;
+	}
+
+	if (backup_cred(cifs_sb))
+		create_options |= CREATE_OPEN_BACKUP_INTENT;
+
+	oparms.tcon = tcon;
+	oparms.cifs_sb = cifs_sb;
+	oparms.desired_access = GENERIC_WRITE;
+	oparms.create_options = create_options;
+	oparms.disposition = FILE_CREATE;
+	oparms.path = full_path;
+	oparms.fid = &fid;
+	oparms.reconnect = false;
+
+	if (tcon->ses->server->oplocks)
+		oplock = REQ_OPLOCK;
+	else
+		oplock = 0;
+	rc = tcon->ses->server->ops->open(xid, &oparms, &oplock, buf);
+	if (rc)
+		goto out;
+
+	/*
+	 * BB Do not bother to decode buf since no local inode yet to put
+	 * timestamps in, but we can reuse it safely.
+	 */
+
+	pdev = (struct win_dev *)buf;
+	io_parms.pid = current->tgid;
+	io_parms.tcon = tcon;
+	io_parms.offset = 0;
+	io_parms.length = sizeof(struct win_dev);
+	iov[1].iov_base = buf;
+	iov[1].iov_len = sizeof(struct win_dev);
+	if (S_ISCHR(mode)) {
+		memcpy(pdev->type, "IntxCHR", 8);
+		pdev->major = cpu_to_le64(MAJOR(dev));
+		pdev->minor = cpu_to_le64(MINOR(dev));
+		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+							&bytes_written, iov, 1);
+	} else if (S_ISBLK(mode)) {
+		memcpy(pdev->type, "IntxBLK", 8);
+		pdev->major = cpu_to_le64(MAJOR(dev));
+		pdev->minor = cpu_to_le64(MINOR(dev));
+		rc = tcon->ses->server->ops->sync_write(xid, &fid, &io_parms,
+							&bytes_written, iov, 1);
+	}
+	tcon->ses->server->ops->close(xid, tcon, &fid);
+	d_drop(dentry);
+
+	/* FIXME: add code here to set EAs */
+out:
+	kfree(buf);
+	return rc;
+}
+
+
 struct smb_version_operations smb20_operations = {
 	.compare_fids = smb2_compare_fids,
 	.setup_request = smb2_setup_request,
@@ -3541,6 +4208,7 @@ struct smb_version_operations smb20_operations = {
 	.get_credits = smb2_get_credits,
 	.wait_mtu_credits = cifs_wait_mtu_credits,
 	.get_next_mid = smb2_get_next_mid,
+	.revert_current_mid = smb2_revert_current_mid,
 	.read_data_offset = smb2_read_data_offset,
 	.read_data_length = smb2_read_data_length,
 	.map_error = map_smb2_to_linux_error,
@@ -3623,6 +4291,9 @@ struct smb_version_operations smb20_operations = {
 #endif /* CIFS_ACL */
 	.next_header = smb2_next_header,
 	.ioctl_query_info = smb2_ioctl_query_info,
+	.make_node = smb2_make_node,
+	.fiemap = smb3_fiemap,
+	.llseek = smb3_llseek,
 };
 
 struct smb_version_operations smb21_operations = {
@@ -3635,7 +4306,9 @@ struct smb_version_operations smb21_operations = {
 	.get_credits_field = smb2_get_credits_field,
 	.get_credits = smb2_get_credits,
 	.wait_mtu_credits = smb2_wait_mtu_credits,
+	.adjust_credits = smb2_adjust_credits,
 	.get_next_mid = smb2_get_next_mid,
+	.revert_current_mid = smb2_revert_current_mid,
 	.read_data_offset = smb2_read_data_offset,
 	.read_data_length = smb2_read_data_length,
 	.map_error = map_smb2_to_linux_error,
@@ -3646,7 +4319,7 @@ struct smb_version_operations smb21_operations = {
 	.print_stats = smb2_print_stats,
 	.is_oplock_break = smb2_is_valid_oplock_break,
 	.handle_cancelled_mid = smb2_handle_cancelled_mid,
-	.downgrade_oplock = smb2_downgrade_oplock,
+	.downgrade_oplock = smb21_downgrade_oplock,
 	.need_neg = smb2_need_neg,
 	.negotiate = smb2_negotiate,
 	.negotiate_wsize = smb2_negotiate_wsize,
@@ -3719,6 +4392,9 @@ struct smb_version_operations smb21_operations = {
 #endif /* CIFS_ACL */
 	.next_header = smb2_next_header,
 	.ioctl_query_info = smb2_ioctl_query_info,
+	.make_node = smb2_make_node,
+	.fiemap = smb3_fiemap,
+	.llseek = smb3_llseek,
 };
 
 struct smb_version_operations smb30_operations = {
@@ -3731,7 +4407,9 @@ struct smb_version_operations smb30_operations = {
 	.get_credits_field = smb2_get_credits_field,
 	.get_credits = smb2_get_credits,
 	.wait_mtu_credits = smb2_wait_mtu_credits,
+	.adjust_credits = smb2_adjust_credits,
 	.get_next_mid = smb2_get_next_mid,
+	.revert_current_mid = smb2_revert_current_mid,
 	.read_data_offset = smb2_read_data_offset,
 	.read_data_length = smb2_read_data_length,
 	.map_error = map_smb2_to_linux_error,
@@ -3743,7 +4421,7 @@ struct smb_version_operations smb30_operations = {
 	.dump_share_caps = smb2_dump_share_caps,
 	.is_oplock_break = smb2_is_valid_oplock_break,
 	.handle_cancelled_mid = smb2_handle_cancelled_mid,
-	.downgrade_oplock = smb2_downgrade_oplock,
+	.downgrade_oplock = smb21_downgrade_oplock,
 	.need_neg = smb2_need_neg,
 	.negotiate = smb2_negotiate,
 	.negotiate_wsize = smb3_negotiate_wsize,
@@ -3824,6 +4502,9 @@ struct smb_version_operations smb30_operations = {
 #endif /* CIFS_ACL */
 	.next_header = smb2_next_header,
 	.ioctl_query_info = smb2_ioctl_query_info,
+	.make_node = smb2_make_node,
+	.fiemap = smb3_fiemap,
+	.llseek = smb3_llseek,
 };
 
 struct smb_version_operations smb311_operations = {
@@ -3836,7 +4517,9 @@ struct smb_version_operations smb311_operations = {
 	.get_credits_field = smb2_get_credits_field,
 	.get_credits = smb2_get_credits,
 	.wait_mtu_credits = smb2_wait_mtu_credits,
+	.adjust_credits = smb2_adjust_credits,
 	.get_next_mid = smb2_get_next_mid,
+	.revert_current_mid = smb2_revert_current_mid,
 	.read_data_offset = smb2_read_data_offset,
 	.read_data_length = smb2_read_data_length,
 	.map_error = map_smb2_to_linux_error,
@@ -3848,7 +4531,7 @@ struct smb_version_operations smb311_operations = {
 	.dump_share_caps = smb2_dump_share_caps,
 	.is_oplock_break = smb2_is_valid_oplock_break,
 	.handle_cancelled_mid = smb2_handle_cancelled_mid,
-	.downgrade_oplock = smb2_downgrade_oplock,
+	.downgrade_oplock = smb21_downgrade_oplock,
 	.need_neg = smb2_need_neg,
 	.negotiate = smb2_negotiate,
 	.negotiate_wsize = smb3_negotiate_wsize,
@@ -3930,6 +4613,9 @@ struct smb_version_operations smb311_operations = {
 #endif /* CIFS_ACL */
 	.next_header = smb2_next_header,
 	.ioctl_query_info = smb2_ioctl_query_info,
+	.make_node = smb2_make_node,
+	.fiemap = smb3_fiemap,
+	.llseek = smb3_llseek,
 };
 
 struct smb_version_values smb20_values = {
diff --git a/fs/cifs/smb2pdu.c b/fs/cifs/smb2pdu.c
index 77b3aaa39b35..75311a8a68bf 100644
--- a/fs/cifs/smb2pdu.c
+++ b/fs/cifs/smb2pdu.c
@@ -107,13 +107,13 @@ smb2_hdr_assemble(struct smb2_sync_hdr *shdr, __le16 smb2_cmd,
 		struct TCP_Server_Info *server = tcon->ses->server;
 
 		spin_lock(&server->req_lock);
-		/* Request up to 2 credits but don't go over the limit. */
+		/* Request up to 10 credits but don't go over the limit. */
 		if (server->credits >= server->max_credits)
 			shdr->CreditRequest = cpu_to_le16(0);
 		else
 			shdr->CreditRequest = cpu_to_le16(
 				min_t(int, server->max_credits -
-						server->credits, 2));
+						server->credits, 10));
 		spin_unlock(&server->req_lock);
 	} else {
 		shdr->CreditRequest = cpu_to_le16(2);
@@ -173,8 +173,8 @@ static int __smb2_reconnect(const struct nls_table *nlsc,
 		return -ENOMEM;
 
 	if (tcon->ipc) {
-		snprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$",
-			 tcon->ses->server->hostname);
+		scnprintf(tree, MAX_TREE_SIZE, "\\\\%s\\IPC$",
+			  tcon->ses->server->hostname);
 		rc = SMB2_tcon(0, tcon->ses, tree, tcon, nlsc);
 		goto out;
 	}
@@ -206,7 +206,7 @@ static int __smb2_reconnect(const struct nls_table *nlsc,
 			continue;
 		}
 
-		snprintf(tree, MAX_TREE_SIZE, "\\%s", tgt);
+		scnprintf(tree, MAX_TREE_SIZE, "\\%s", tgt);
 
 		rc = SMB2_tcon(0, tcon->ses, tree, tcon, nlsc);
 		if (!rc)
@@ -459,10 +459,7 @@ smb2_plain_req_init(__le16 smb2_command, struct cifs_tcon *tcon,
 	return rc;
 }
 
-
-#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES	cpu_to_le16(1)
-#define SMB2_ENCRYPTION_CAPABILITIES		cpu_to_le16(2)
-#define SMB2_POSIX_EXTENSIONS_AVAILABLE		cpu_to_le16(0x100)
+/* For explanation of negotiate contexts see MS-SMB2 section 2.2.3.1 */
 
 static void
 build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
@@ -476,6 +473,19 @@ build_preauth_ctxt(struct smb2_preauth_neg_context *pneg_ctxt)
 }
 
 static void
+build_compression_ctxt(struct smb2_compression_capabilities_context *pneg_ctxt)
+{
+	pneg_ctxt->ContextType = SMB2_COMPRESSION_CAPABILITIES;
+	pneg_ctxt->DataLength =
+		cpu_to_le16(sizeof(struct smb2_compression_capabilities_context)
+			  - sizeof(struct smb2_neg_context));
+	pneg_ctxt->CompressionAlgorithmCount = cpu_to_le16(3);
+	pneg_ctxt->CompressionAlgorithms[0] = SMB3_COMPRESS_LZ77;
+	pneg_ctxt->CompressionAlgorithms[1] = SMB3_COMPRESS_LZ77_HUFF;
+	pneg_ctxt->CompressionAlgorithms[2] = SMB3_COMPRESS_LZNT1;
+}
+
+static void
 build_encrypt_ctxt(struct smb2_encryption_neg_context *pneg_ctxt)
 {
 	pneg_ctxt->ContextType = SMB2_ENCRYPTION_CAPABILITIES;
@@ -490,6 +500,23 @@ build_posix_ctxt(struct smb2_posix_neg_context *pneg_ctxt)
 {
 	pneg_ctxt->ContextType = SMB2_POSIX_EXTENSIONS_AVAILABLE;
 	pneg_ctxt->DataLength = cpu_to_le16(POSIX_CTXT_DATA_LEN);
+	/* SMB2_CREATE_TAG_POSIX is "0x93AD25509CB411E7B42383DE968BCD7C" */
+	pneg_ctxt->Name[0] = 0x93;
+	pneg_ctxt->Name[1] = 0xAD;
+	pneg_ctxt->Name[2] = 0x25;
+	pneg_ctxt->Name[3] = 0x50;
+	pneg_ctxt->Name[4] = 0x9C;
+	pneg_ctxt->Name[5] = 0xB4;
+	pneg_ctxt->Name[6] = 0x11;
+	pneg_ctxt->Name[7] = 0xE7;
+	pneg_ctxt->Name[8] = 0xB4;
+	pneg_ctxt->Name[9] = 0x23;
+	pneg_ctxt->Name[10] = 0x83;
+	pneg_ctxt->Name[11] = 0xDE;
+	pneg_ctxt->Name[12] = 0x96;
+	pneg_ctxt->Name[13] = 0x8B;
+	pneg_ctxt->Name[14] = 0xCD;
+	pneg_ctxt->Name[15] = 0x7C;
 }
 
 static void
@@ -524,10 +551,17 @@ assemble_neg_contexts(struct smb2_negotiate_req *req,
 	*total_len += ctxt_len;
 	pneg_ctxt += ctxt_len;
 
+	build_compression_ctxt((struct smb2_compression_capabilities_context *)
+				pneg_ctxt);
+	ctxt_len = DIV_ROUND_UP(
+		sizeof(struct smb2_compression_capabilities_context), 8) * 8;
+	*total_len += ctxt_len;
+	pneg_ctxt += ctxt_len;
+
 	build_posix_ctxt((struct smb2_posix_neg_context *)pneg_ctxt);
 	*total_len += sizeof(struct smb2_posix_neg_context);
 
-	req->NegotiateContextCount = cpu_to_le16(3);
+	req->NegotiateContextCount = cpu_to_le16(4);
 }
 
 static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
@@ -545,6 +579,27 @@ static void decode_preauth_context(struct smb2_preauth_neg_context *ctxt)
 		printk_once(KERN_WARNING "unknown SMB3 hash algorithm\n");
 }
 
+static void decode_compress_ctx(struct TCP_Server_Info *server,
+			 struct smb2_compression_capabilities_context *ctxt)
+{
+	unsigned int len = le16_to_cpu(ctxt->DataLength);
+
+	/* sizeof compress context is a one element compression capbility struct */
+	if (len < 10) {
+		printk_once(KERN_WARNING "server sent bad compression cntxt\n");
+		return;
+	}
+	if (le16_to_cpu(ctxt->CompressionAlgorithmCount) != 1) {
+		printk_once(KERN_WARNING "illegal SMB3 compress algorithm count\n");
+		return;
+	}
+	if (le16_to_cpu(ctxt->CompressionAlgorithms[0]) > 3) {
+		printk_once(KERN_WARNING "unknown compression algorithm\n");
+		return;
+	}
+	server->compress_algorithm = ctxt->CompressionAlgorithms[0];
+}
+
 static int decode_encrypt_ctx(struct TCP_Server_Info *server,
 			      struct smb2_encryption_neg_context *ctxt)
 {
@@ -609,6 +664,9 @@ static int smb311_decode_neg_context(struct smb2_negotiate_rsp *rsp,
 		else if (pctx->ContextType == SMB2_ENCRYPTION_CAPABILITIES)
 			rc = decode_encrypt_ctx(server,
 				(struct smb2_encryption_neg_context *)pctx);
+		else if (pctx->ContextType == SMB2_COMPRESSION_CAPABILITIES)
+			decode_compress_ctx(server,
+				(struct smb2_compression_capabilities_context *)pctx);
 		else if (pctx->ContextType == SMB2_POSIX_EXTENSIONS_AVAILABLE)
 			server->posix_ext_supported = true;
 		else
@@ -815,8 +873,11 @@ SMB2_negotiate(const unsigned int xid, struct cifs_ses *ses)
 		} else if (rsp->DialectRevision == cpu_to_le16(SMB21_PROT_ID)) {
 			/* ops set to 3.0 by default for default so update */
 			ses->server->ops = &smb21_operations;
-		} else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID))
+			ses->server->vals = &smb21_values;
+		} else if (rsp->DialectRevision == cpu_to_le16(SMB311_PROT_ID)) {
 			ses->server->ops = &smb311_operations;
+			ses->server->vals = &smb311_values;
+		}
 	} else if (le16_to_cpu(rsp->DialectRevision) !=
 				ses->server->vals->protocol_id) {
 		/* if requested single dialect ensure returned dialect matched */
@@ -985,9 +1046,17 @@ int smb3_validate_negotiate(const unsigned int xid, struct cifs_tcon *tcon)
 
 	rc = SMB2_ioctl(xid, tcon, NO_FILE_ID, NO_FILE_ID,
 		FSCTL_VALIDATE_NEGOTIATE_INFO, true /* is_fsctl */,
-		(char *)pneg_inbuf, inbuflen, (char **)&pneg_rsp, &rsplen);
-
-	if (rc != 0) {
+		(char *)pneg_inbuf, inbuflen, CIFSMaxBufSize,
+		(char **)&pneg_rsp, &rsplen);
+	if (rc == -EOPNOTSUPP) {
+		/*
+		 * Old Windows versions or Netapp SMB server can return
+		 * not supported error. Client should accept it.
+		 */
+		cifs_dbg(VFS, "Server does not support validate negotiate\n");
+		rc = 0;
+		goto out_free_inbuf;
+	} else if (rc != 0) {
 		cifs_dbg(VFS, "validate protocol negotiate failed: %d\n", rc);
 		rc = -EIO;
 		goto out_free_inbuf;
@@ -1514,7 +1583,7 @@ SMB2_logoff(const unsigned int xid, struct cifs_ses *ses)
 	else if (server->sign)
 		req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
 
-	flags |= CIFS_NO_RESP;
+	flags |= CIFS_NO_RSP_BUF;
 
 	iov[0].iov_base = (char *)req;
 	iov[0].iov_len = total_len;
@@ -1605,15 +1674,25 @@ SMB2_tcon(const unsigned int xid, struct cifs_ses *ses, const char *tree,
 	iov[1].iov_base = unc_path;
 	iov[1].iov_len = unc_path_len;
 
-	/* 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1 */
+	/*
+	 * 3.11 tcon req must be signed if not encrypted. See MS-SMB2 3.2.4.1.1
+	 * unless it is guest or anonymous user. See MS-SMB2 3.2.5.3.1
+	 * (Samba servers don't always set the flag so also check if null user)
+	 */
 	if ((ses->server->dialect == SMB311_PROT_ID) &&
-	    !smb3_encryption_required(tcon))
+	    !smb3_encryption_required(tcon) &&
+	    !(ses->session_flags &
+		    (SMB2_SESSION_FLAG_IS_GUEST|SMB2_SESSION_FLAG_IS_NULL)) &&
+	    ((ses->user_name != NULL) || (ses->sectype == Kerberos)))
 		req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
 
 	memset(&rqst, 0, sizeof(struct smb_rqst));
 	rqst.rq_iov = iov;
 	rqst.rq_nvec = 2;
 
+	/* Need 64 for max size write so ask for more in case not there yet */
+	req->sync_hdr.CreditRequest = cpu_to_le16(64);
+
 	rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
 	cifs_small_buf_release(req);
 	rsp = (struct smb2_tree_connect_rsp *)rsp_iov.iov_base;
@@ -1705,7 +1784,7 @@ SMB2_tdis(const unsigned int xid, struct cifs_tcon *tcon)
 	if (smb3_encryption_required(tcon))
 		flags |= CIFS_TRANSFORM_REQ;
 
-	flags |= CIFS_NO_RESP;
+	flags |= CIFS_NO_RSP_BUF;
 
 	iov[0].iov_base = (char *)req;
 	iov[0].iov_len = total_len;
@@ -1771,9 +1850,10 @@ create_reconnect_durable_buf(struct cifs_fid *fid)
 	return buf;
 }
 
-static __u8
-parse_lease_state(struct TCP_Server_Info *server, struct smb2_create_rsp *rsp,
-		  unsigned int *epoch, char *lease_key)
+__u8
+smb2_parse_lease_state(struct TCP_Server_Info *server,
+		       struct smb2_create_rsp *rsp,
+		       unsigned int *epoch, char *lease_key)
 {
 	char *data_offset;
 	struct create_context *cc;
@@ -1824,8 +1904,9 @@ add_lease_context(struct TCP_Server_Info *server, struct kvec *iov,
 }
 
 static struct create_durable_v2 *
-create_durable_v2_buf(struct cifs_fid *pfid)
+create_durable_v2_buf(struct cifs_open_parms *oparms)
 {
+	struct cifs_fid *pfid = oparms->fid;
 	struct create_durable_v2 *buf;
 
 	buf = kzalloc(sizeof(struct create_durable_v2), GFP_KERNEL);
@@ -1839,7 +1920,14 @@ create_durable_v2_buf(struct cifs_fid *pfid)
 				(struct create_durable_v2, Name));
 	buf->ccontext.NameLength = cpu_to_le16(4);
 
-	buf->dcontext.Timeout = 0; /* Should this be configurable by workload */
+	/*
+	 * NB: Handle timeout defaults to 0, which allows server to choose
+	 * (most servers default to 120 seconds) and most clients default to 0.
+	 * This can be overridden at mount ("handletimeout=") if the user wants
+	 * a different persistent (or resilient) handle timeout for all opens
+	 * opens on a particular SMB3 mount.
+	 */
+	buf->dcontext.Timeout = cpu_to_le32(oparms->tcon->handle_timeout);
 	buf->dcontext.Flags = cpu_to_le32(SMB2_DHANDLE_FLAG_PERSISTENT);
 	generate_random_uuid(buf->dcontext.CreateGuid);
 	memcpy(pfid->create_guid, buf->dcontext.CreateGuid, 16);
@@ -1892,7 +1980,7 @@ add_durable_v2_context(struct kvec *iov, unsigned int *num_iovec,
 	struct smb2_create_req *req = iov[0].iov_base;
 	unsigned int num = *num_iovec;
 
-	iov[num].iov_base = create_durable_v2_buf(oparms->fid);
+	iov[num].iov_base = create_durable_v2_buf(oparms);
 	if (iov[num].iov_base == NULL)
 		return -ENOMEM;
 	iov[num].iov_len = sizeof(struct create_durable_v2);
@@ -2170,6 +2258,8 @@ int smb311_posix_mkdir(const unsigned int xid, struct inode *inode,
 	rqst.rq_iov = iov;
 	rqst.rq_nvec = n_iov;
 
+	trace_smb3_posix_mkdir_enter(xid, tcon->tid, ses->Suid, CREATE_NOT_FILE,
+				    FILE_WRITE_ATTRIBUTES);
 	/* resource #4: response buffer */
 	rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
 	if (rc) {
@@ -2388,6 +2478,9 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
 	if (rc)
 		goto creat_exit;
 
+	trace_smb3_open_enter(xid, tcon->tid, tcon->ses->Suid,
+		oparms->create_options, oparms->desired_access);
+
 	rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
 			    &rsp_iov);
 	rsp = (struct smb2_create_rsp *)rsp_iov.iov_base;
@@ -2425,8 +2518,9 @@ SMB2_open(const unsigned int xid, struct cifs_open_parms *oparms, __le16 *path,
 	}
 
 	if (rsp->OplockLevel == SMB2_OPLOCK_LEVEL_LEASE)
-		*oplock = parse_lease_state(server, rsp, &oparms->fid->epoch,
-					    oparms->fid->lease_key);
+		*oplock = smb2_parse_lease_state(server, rsp,
+						 &oparms->fid->epoch,
+						 oparms->fid->lease_key);
 	else
 		*oplock = rsp->OplockLevel;
 creat_exit:
@@ -2435,120 +2529,164 @@ creat_exit:
 	return rc;
 }
 
-/*
- *	SMB2 IOCTL is used for both IOCTLs and FSCTLs
- */
 int
-SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
-	   u64 volatile_fid, u32 opcode, bool is_fsctl,
-	   char *in_data, u32 indatalen,
-	   char **out_data, u32 *plen /* returned data len */)
+SMB2_ioctl_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
+		u64 persistent_fid, u64 volatile_fid, u32 opcode,
+		bool is_fsctl, char *in_data, u32 indatalen,
+		__u32 max_response_size)
 {
-	struct smb_rqst rqst;
 	struct smb2_ioctl_req *req;
-	struct smb2_ioctl_rsp *rsp;
-	struct cifs_ses *ses;
-	struct kvec iov[2];
-	struct kvec rsp_iov;
-	int resp_buftype;
-	int n_iov;
-	int rc = 0;
-	int flags = 0;
+	struct kvec *iov = rqst->rq_iov;
 	unsigned int total_len;
-
-	cifs_dbg(FYI, "SMB2 IOCTL\n");
-
-	if (out_data != NULL)
-		*out_data = NULL;
-
-	/* zero out returned data len, in case of error */
-	if (plen)
-		*plen = 0;
-
-	if (tcon)
-		ses = tcon->ses;
-	else
-		return -EIO;
-
-	if (!ses || !(ses->server))
-		return -EIO;
+	int rc;
+	char *in_data_buf;
 
 	rc = smb2_plain_req_init(SMB2_IOCTL, tcon, (void **) &req, &total_len);
 	if (rc)
 		return rc;
 
-	if (smb3_encryption_required(tcon))
-		flags |= CIFS_TRANSFORM_REQ;
+	if (indatalen) {
+		/*
+		 * indatalen is usually small at a couple of bytes max, so
+		 * just allocate through generic pool
+		 */
+		in_data_buf = kmalloc(indatalen, GFP_NOFS);
+		if (!in_data_buf) {
+			cifs_small_buf_release(req);
+			return -ENOMEM;
+		}
+		memcpy(in_data_buf, in_data, indatalen);
+	}
 
 	req->CtlCode = cpu_to_le32(opcode);
 	req->PersistentFileId = persistent_fid;
 	req->VolatileFileId = volatile_fid;
 
+	iov[0].iov_base = (char *)req;
+	/*
+	 * If no input data, the size of ioctl struct in
+	 * protocol spec still includes a 1 byte data buffer,
+	 * but if input data passed to ioctl, we do not
+	 * want to double count this, so we do not send
+	 * the dummy one byte of data in iovec[0] if sending
+	 * input data (in iovec[1]).
+	 */
 	if (indatalen) {
 		req->InputCount = cpu_to_le32(indatalen);
 		/* do not set InputOffset if no input data */
 		req->InputOffset =
 		       cpu_to_le32(offsetof(struct smb2_ioctl_req, Buffer));
-		iov[1].iov_base = in_data;
+		rqst->rq_nvec = 2;
+		iov[0].iov_len = total_len - 1;
+		iov[1].iov_base = in_data_buf;
 		iov[1].iov_len = indatalen;
-		n_iov = 2;
-	} else
-		n_iov = 1;
+	} else {
+		rqst->rq_nvec = 1;
+		iov[0].iov_len = total_len;
+	}
 
 	req->OutputOffset = 0;
 	req->OutputCount = 0; /* MBZ */
 
 	/*
-	 * Could increase MaxOutputResponse, but that would require more
-	 * than one credit. Windows typically sets this smaller, but for some
+	 * In most cases max_response_size is set to 16K (CIFSMaxBufSize)
+	 * We Could increase default MaxOutputResponse, but that could require
+	 * more credits. Windows typically sets this smaller, but for some
 	 * ioctls it may be useful to allow server to send more. No point
 	 * limiting what the server can send as long as fits in one credit
-	 * Unfortunately - we can not handle more than CIFS_MAX_MSG_SIZE
-	 * (by default, note that it can be overridden to make max larger)
-	 * in responses (except for read responses which can be bigger.
-	 * We may want to bump this limit up
+	 * We can not handle more than CIFS_MAX_BUF_SIZE yet but may want
+	 * to increase this limit up in the future.
+	 * Note that for snapshot queries that servers like Azure expect that
+	 * the first query be minimal size (and just used to get the number/size
+	 * of previous versions) so response size must be specified as EXACTLY
+	 * sizeof(struct snapshot_array) which is 16 when rounded up to multiple
+	 * of eight bytes.  Currently that is the only case where we set max
+	 * response size smaller.
 	 */
-	req->MaxOutputResponse = cpu_to_le32(CIFSMaxBufSize);
+	req->MaxOutputResponse = cpu_to_le32(max_response_size);
 
 	if (is_fsctl)
 		req->Flags = cpu_to_le32(SMB2_0_IOCTL_IS_FSCTL);
 	else
 		req->Flags = 0;
 
-	iov[0].iov_base = (char *)req;
-
-	/*
-	 * If no input data, the size of ioctl struct in
-	 * protocol spec still includes a 1 byte data buffer,
-	 * but if input data passed to ioctl, we do not
-	 * want to double count this, so we do not send
-	 * the dummy one byte of data in iovec[0] if sending
-	 * input data (in iovec[1]).
-	 */
-
-	if (indatalen) {
-		iov[0].iov_len = total_len - 1;
-	} else
-		iov[0].iov_len = total_len;
-
 	/* validate negotiate request must be signed - see MS-SMB2 3.2.5.5 */
 	if (opcode == FSCTL_VALIDATE_NEGOTIATE_INFO)
 		req->sync_hdr.Flags |= SMB2_FLAGS_SIGNED;
 
+	return 0;
+}
+
+void
+SMB2_ioctl_free(struct smb_rqst *rqst)
+{
+	int i;
+	if (rqst && rqst->rq_iov) {
+		cifs_small_buf_release(rqst->rq_iov[0].iov_base); /* request */
+		for (i = 1; i < rqst->rq_nvec; i++)
+			if (rqst->rq_iov[i].iov_base != smb2_padding)
+				kfree(rqst->rq_iov[i].iov_base);
+	}
+}
+
+
+/*
+ *	SMB2 IOCTL is used for both IOCTLs and FSCTLs
+ */
+int
+SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
+	   u64 volatile_fid, u32 opcode, bool is_fsctl,
+	   char *in_data, u32 indatalen, u32 max_out_data_len,
+	   char **out_data, u32 *plen /* returned data len */)
+{
+	struct smb_rqst rqst;
+	struct smb2_ioctl_rsp *rsp = NULL;
+	struct cifs_ses *ses;
+	struct kvec iov[SMB2_IOCTL_IOV_SIZE];
+	struct kvec rsp_iov = {NULL, 0};
+	int resp_buftype = CIFS_NO_BUFFER;
+	int rc = 0;
+	int flags = 0;
+
+	cifs_dbg(FYI, "SMB2 IOCTL\n");
+
+	if (out_data != NULL)
+		*out_data = NULL;
+
+	/* zero out returned data len, in case of error */
+	if (plen)
+		*plen = 0;
+
+	if (tcon)
+		ses = tcon->ses;
+	else
+		return -EIO;
+
+	if (!ses || !(ses->server))
+		return -EIO;
+
+	if (smb3_encryption_required(tcon))
+		flags |= CIFS_TRANSFORM_REQ;
+
 	memset(&rqst, 0, sizeof(struct smb_rqst));
+	memset(&iov, 0, sizeof(iov));
 	rqst.rq_iov = iov;
-	rqst.rq_nvec = n_iov;
+	rqst.rq_nvec = SMB2_IOCTL_IOV_SIZE;
+
+	rc = SMB2_ioctl_init(tcon, &rqst, persistent_fid, volatile_fid, opcode,
+			     is_fsctl, in_data, indatalen, max_out_data_len);
+	if (rc)
+		goto ioctl_exit;
 
 	rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags,
 			    &rsp_iov);
-	cifs_small_buf_release(req);
 	rsp = (struct smb2_ioctl_rsp *)rsp_iov.iov_base;
 
 	if (rc != 0)
 		trace_smb3_fsctl_err(xid, persistent_fid, tcon->tid,
 				ses->Suid, 0, opcode, rc);
 
-	if ((rc != 0) && (rc != -EINVAL)) {
+	if ((rc != 0) && (rc != -EINVAL) && (rc != -E2BIG)) {
 		cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
 		goto ioctl_exit;
 	} else if (rc == -EINVAL) {
@@ -2557,6 +2695,11 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
 			cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
 			goto ioctl_exit;
 		}
+	} else if (rc == -E2BIG) {
+		if (opcode != FSCTL_QUERY_ALLOCATED_RANGES) {
+			cifs_stats_fail_inc(tcon, SMB2_IOCTL_HE);
+			goto ioctl_exit;
+		}
 	}
 
 	/* check if caller wants to look at return data or just return rc */
@@ -2591,6 +2734,7 @@ SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon, u64 persistent_fid,
 	}
 
 ioctl_exit:
+	SMB2_ioctl_free(&rqst);
 	free_rsp_buf(resp_buftype, rsp);
 	return rc;
 }
@@ -2613,7 +2757,8 @@ SMB2_set_compression(const unsigned int xid, struct cifs_tcon *tcon,
 	rc = SMB2_ioctl(xid, tcon, persistent_fid, volatile_fid,
 			FSCTL_SET_COMPRESSION, true /* is_fsctl */,
 			(char *)&fsctl_input /* data input */,
-			2 /* in data len */, &ret_data /* out data */, NULL);
+			2 /* in data len */, CIFSMaxBufSize /* max out data */,
+			&ret_data /* out data */, NULL);
 
 	cifs_dbg(FYI, "set compression rc %d\n", rc);
 
@@ -2837,6 +2982,9 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon,
 	if (rc)
 		goto qinf_exit;
 
+	trace_smb3_query_info_enter(xid, persistent_fid, tcon->tid,
+				    ses->Suid, info_class, (__u32)info_type);
+
 	rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
 	rsp = (struct smb2_query_info_rsp *)rsp_iov.iov_base;
 
@@ -2847,6 +2995,9 @@ query_info(const unsigned int xid, struct cifs_tcon *tcon,
 		goto qinf_exit;
 	}
 
+	trace_smb3_query_info_done(xid, persistent_fid, tcon->tid,
+				ses->Suid, info_class, (__u32)info_type);
+
 	if (dlen) {
 		*dlen = le32_to_cpu(rsp->OutputBufferLength);
 		if (!*data) {
@@ -2924,14 +3075,16 @@ smb2_echo_callback(struct mid_q_entry *mid)
 {
 	struct TCP_Server_Info *server = mid->callback_data;
 	struct smb2_echo_rsp *rsp = (struct smb2_echo_rsp *)mid->resp_buf;
-	unsigned int credits_received = 0;
+	struct cifs_credits credits = { .value = 0, .instance = 0 };
 
 	if (mid->mid_state == MID_RESPONSE_RECEIVED
-	    || mid->mid_state == MID_RESPONSE_MALFORMED)
-		credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
+	    || mid->mid_state == MID_RESPONSE_MALFORMED) {
+		credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
+		credits.instance = server->reconnect_instance;
+	}
 
 	DeleteMidQEntry(mid);
-	add_credits(server, credits_received, CIFS_ECHO_OP);
+	add_credits(server, &credits, CIFS_ECHO_OP);
 }
 
 void smb2_reconnect_server(struct work_struct *work)
@@ -2961,9 +3114,14 @@ void smb2_reconnect_server(struct work_struct *work)
 				tcon_exist = true;
 			}
 		}
+		/*
+		 * IPC has the same lifetime as its session and uses its
+		 * refcount.
+		 */
 		if (ses->tcon_ipc && ses->tcon_ipc->need_reconnect) {
 			list_add_tail(&ses->tcon_ipc->rlist, &tmp_list);
 			tcon_exist = true;
+			ses->ses_count++;
 		}
 	}
 	/*
@@ -2982,7 +3140,10 @@ void smb2_reconnect_server(struct work_struct *work)
 		else
 			resched = true;
 		list_del_init(&tcon->rlist);
-		cifs_put_tcon(tcon);
+		if (tcon->ipc)
+			cifs_put_smb_ses(tcon->ses);
+		else
+			cifs_put_tcon(tcon);
 	}
 
 	cifs_dbg(FYI, "Reconnecting tcons finished\n");
@@ -3023,7 +3184,7 @@ SMB2_echo(struct TCP_Server_Info *server)
 	iov[0].iov_base = (char *)req;
 
 	rc = cifs_call_async(server, &rqst, NULL, smb2_echo_callback, NULL,
-			     server, CIFS_ECHO_OP);
+			     server, CIFS_ECHO_OP, NULL);
 	if (rc)
 		cifs_dbg(FYI, "Echo request failed: %d\n", rc);
 
@@ -3114,6 +3275,11 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
 	req->MinimumCount = 0;
 	req->Length = cpu_to_le32(io_parms->length);
 	req->Offset = cpu_to_le64(io_parms->offset);
+
+	trace_smb3_read_enter(0 /* xid */,
+			io_parms->persistent_fid,
+			io_parms->tcon->tid, io_parms->tcon->ses->Suid,
+			io_parms->offset, io_parms->length);
 #ifdef CONFIG_CIFS_SMB_DIRECT
 	/*
 	 * If we want to do a RDMA write, fill in and append
@@ -3131,7 +3297,7 @@ smb2_new_read_req(void **buf, unsigned int *total_len,
 				rdata->nr_pages, rdata->page_offset,
 				rdata->tailsz, true, need_invalidate);
 		if (!rdata->mr)
-			return -ENOBUFS;
+			return -EAGAIN;
 
 		req->Channel = SMB2_CHANNEL_RDMA_V1_INVALIDATE;
 		if (need_invalidate)
@@ -3184,7 +3350,7 @@ smb2_readv_callback(struct mid_q_entry *mid)
 	struct TCP_Server_Info *server = tcon->ses->server;
 	struct smb2_sync_hdr *shdr =
 				(struct smb2_sync_hdr *)rdata->iov[0].iov_base;
-	unsigned int credits_received = 0;
+	struct cifs_credits credits = { .value = 0, .instance = 0 };
 	struct smb_rqst rqst = { .rq_iov = rdata->iov,
 				 .rq_nvec = 2,
 				 .rq_pages = rdata->pages,
@@ -3199,7 +3365,8 @@ smb2_readv_callback(struct mid_q_entry *mid)
 
 	switch (mid->mid_state) {
 	case MID_RESPONSE_RECEIVED:
-		credits_received = le16_to_cpu(shdr->CreditRequest);
+		credits.value = le16_to_cpu(shdr->CreditRequest);
+		credits.instance = server->reconnect_instance;
 		/* result already set, check signature */
 		if (server->sign && !mid->decrypted) {
 			int rc;
@@ -3224,11 +3391,11 @@ smb2_readv_callback(struct mid_q_entry *mid)
 		cifs_stats_bytes_read(tcon, rdata->got_bytes);
 		break;
 	case MID_RESPONSE_MALFORMED:
-		credits_received = le16_to_cpu(shdr->CreditRequest);
+		credits.value = le16_to_cpu(shdr->CreditRequest);
+		credits.instance = server->reconnect_instance;
 		/* fall through */
 	default:
-		if (rdata->result != -ENODATA)
-			rdata->result = -EIO;
+		rdata->result = -EIO;
 	}
 #ifdef CONFIG_CIFS_SMB_DIRECT
 	/*
@@ -3255,7 +3422,7 @@ smb2_readv_callback(struct mid_q_entry *mid)
 
 	queue_work(cifsiod_wq, &rdata->work);
 	DeleteMidQEntry(mid);
-	add_credits(server, credits_received, 0);
+	add_credits(server, &credits, 0);
 }
 
 /* smb2_async_readv - send an async read, and set up mid to handle result */
@@ -3285,17 +3452,8 @@ smb2_async_readv(struct cifs_readdata *rdata)
 
 	rc = smb2_new_read_req(
 		(void **) &buf, &total_len, &io_parms, rdata, 0, 0);
-	if (rc) {
-		if (rc == -EAGAIN && rdata->credits) {
-			/* credits was reset by reconnect */
-			rdata->credits = 0;
-			/* reduce in_flight value since we won't send the req */
-			spin_lock(&server->req_lock);
-			server->in_flight--;
-			spin_unlock(&server->req_lock);
-		}
+	if (rc)
 		return rc;
-	}
 
 	if (smb3_encryption_required(io_parms.tcon))
 		flags |= CIFS_TRANSFORM_REQ;
@@ -3305,24 +3463,24 @@ smb2_async_readv(struct cifs_readdata *rdata)
 
 	shdr = (struct smb2_sync_hdr *)buf;
 
-	if (rdata->credits) {
+	if (rdata->credits.value > 0) {
 		shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(rdata->bytes,
 						SMB2_MAX_BUFFER_SIZE));
 		shdr->CreditRequest =
 			cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
-		spin_lock(&server->req_lock);
-		server->credits += rdata->credits -
-						le16_to_cpu(shdr->CreditCharge);
-		spin_unlock(&server->req_lock);
-		wake_up(&server->request_q);
-		rdata->credits = le16_to_cpu(shdr->CreditCharge);
+
+		rc = adjust_credits(server, &rdata->credits, rdata->bytes);
+		if (rc)
+			goto async_readv_out;
+
 		flags |= CIFS_HAS_CREDITS;
 	}
 
 	kref_get(&rdata->refcount);
 	rc = cifs_call_async(io_parms.tcon->ses->server, &rqst,
 			     cifs_readv_receive, smb2_readv_callback,
-			     smb3_handle_read_data, rdata, flags);
+			     smb3_handle_read_data, rdata, flags,
+			     &rdata->credits);
 	if (rc) {
 		kref_put(&rdata->refcount, cifs_readdata_release);
 		cifs_stats_fail_inc(io_parms.tcon, SMB2_READ_HE);
@@ -3332,6 +3490,7 @@ smb2_async_readv(struct cifs_readdata *rdata)
 				    io_parms.offset, io_parms.length, rc);
 	}
 
+async_readv_out:
 	cifs_small_buf_release(buf);
 	return rc;
 }
@@ -3366,8 +3525,6 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
 	rqst.rq_nvec = 1;
 
 	rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
-	cifs_small_buf_release(req);
-
 	rsp = (struct smb2_read_rsp *)rsp_iov.iov_base;
 
 	if (rc) {
@@ -3378,14 +3535,20 @@ SMB2_read(const unsigned int xid, struct cifs_io_parms *io_parms,
 					    io_parms->tcon->tid, ses->Suid,
 					    io_parms->offset, io_parms->length,
 					    rc);
-		}
+		} else
+			trace_smb3_read_done(xid, req->PersistentFileId,
+				    io_parms->tcon->tid, ses->Suid,
+				    io_parms->offset, 0);
 		free_rsp_buf(resp_buftype, rsp_iov.iov_base);
+		cifs_small_buf_release(req);
 		return rc == -ENODATA ? 0 : rc;
 	} else
 		trace_smb3_read_done(xid, req->PersistentFileId,
 				    io_parms->tcon->tid, ses->Suid,
 				    io_parms->offset, io_parms->length);
 
+	cifs_small_buf_release(req);
+
 	*nbytes = le32_to_cpu(rsp->DataLength);
 	if ((*nbytes > CIFS_MAX_MSGSIZE) ||
 	    (*nbytes > io_parms->length)) {
@@ -3417,14 +3580,16 @@ smb2_writev_callback(struct mid_q_entry *mid)
 {
 	struct cifs_writedata *wdata = mid->callback_data;
 	struct cifs_tcon *tcon = tlink_tcon(wdata->cfile->tlink);
+	struct TCP_Server_Info *server = tcon->ses->server;
 	unsigned int written;
 	struct smb2_write_rsp *rsp = (struct smb2_write_rsp *)mid->resp_buf;
-	unsigned int credits_received = 0;
+	struct cifs_credits credits = { .value = 0, .instance = 0 };
 
 	switch (mid->mid_state) {
 	case MID_RESPONSE_RECEIVED:
-		credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
-		wdata->result = smb2_check_receive(mid, tcon->ses->server, 0);
+		credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
+		credits.instance = server->reconnect_instance;
+		wdata->result = smb2_check_receive(mid, server, 0);
 		if (wdata->result != 0)
 			break;
 
@@ -3448,7 +3613,8 @@ smb2_writev_callback(struct mid_q_entry *mid)
 		wdata->result = -EAGAIN;
 		break;
 	case MID_RESPONSE_MALFORMED:
-		credits_received = le16_to_cpu(rsp->sync_hdr.CreditRequest);
+		credits.value = le16_to_cpu(rsp->sync_hdr.CreditRequest);
+		credits.instance = server->reconnect_instance;
 		/* fall through */
 	default:
 		wdata->result = -EIO;
@@ -3481,7 +3647,7 @@ smb2_writev_callback(struct mid_q_entry *mid)
 
 	queue_work(cifsiod_wq, &wdata->work);
 	DeleteMidQEntry(mid);
-	add_credits(tcon->ses->server, credits_received, 0);
+	add_credits(server, &credits, 0);
 }
 
 /* smb2_async_writev - send an async write, and set up mid to handle result */
@@ -3499,17 +3665,8 @@ smb2_async_writev(struct cifs_writedata *wdata,
 	unsigned int total_len;
 
 	rc = smb2_plain_req_init(SMB2_WRITE, tcon, (void **) &req, &total_len);
-	if (rc) {
-		if (rc == -EAGAIN && wdata->credits) {
-			/* credits was reset by reconnect */
-			wdata->credits = 0;
-			/* reduce in_flight value since we won't send the req */
-			spin_lock(&server->req_lock);
-			server->in_flight--;
-			spin_unlock(&server->req_lock);
-		}
-		goto async_writev_out;
-	}
+	if (rc)
+		return rc;
 
 	if (smb3_encryption_required(tcon))
 		flags |= CIFS_TRANSFORM_REQ;
@@ -3526,6 +3683,9 @@ smb2_async_writev(struct cifs_writedata *wdata,
 	req->DataOffset = cpu_to_le16(
 				offsetof(struct smb2_write_req, Buffer));
 	req->RemainingBytes = 0;
+
+	trace_smb3_write_enter(0 /* xid */, wdata->cfile->fid.persistent_fid,
+		tcon->tid, tcon->ses->Suid, wdata->offset, wdata->bytes);
 #ifdef CONFIG_CIFS_SMB_DIRECT
 	/*
 	 * If we want to do a server RDMA read, fill in and append
@@ -3542,7 +3702,7 @@ smb2_async_writev(struct cifs_writedata *wdata,
 				wdata->nr_pages, wdata->page_offset,
 				wdata->tailsz, false, need_invalidate);
 		if (!wdata->mr) {
-			rc = -ENOBUFS;
+			rc = -EAGAIN;
 			goto async_writev_out;
 		}
 		req->Length = 0;
@@ -3595,23 +3755,22 @@ smb2_async_writev(struct cifs_writedata *wdata,
 	req->Length = cpu_to_le32(wdata->bytes);
 #endif
 
-	if (wdata->credits) {
+	if (wdata->credits.value > 0) {
 		shdr->CreditCharge = cpu_to_le16(DIV_ROUND_UP(wdata->bytes,
 						    SMB2_MAX_BUFFER_SIZE));
 		shdr->CreditRequest =
 			cpu_to_le16(le16_to_cpu(shdr->CreditCharge) + 1);
-		spin_lock(&server->req_lock);
-		server->credits += wdata->credits -
-						le16_to_cpu(shdr->CreditCharge);
-		spin_unlock(&server->req_lock);
-		wake_up(&server->request_q);
-		wdata->credits = le16_to_cpu(shdr->CreditCharge);
+
+		rc = adjust_credits(server, &wdata->credits, wdata->bytes);
+		if (rc)
+			goto async_writev_out;
+
 		flags |= CIFS_HAS_CREDITS;
 	}
 
 	kref_get(&wdata->refcount);
 	rc = cifs_call_async(server, &rqst, NULL, smb2_writev_callback, NULL,
-			     wdata, flags);
+			     wdata, flags, &wdata->credits);
 
 	if (rc) {
 		trace_smb3_write_err(0 /* no xid */, req->PersistentFileId,
@@ -3674,6 +3833,10 @@ SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
 				offsetof(struct smb2_write_req, Buffer));
 	req->RemainingBytes = 0;
 
+	trace_smb3_write_enter(xid, io_parms->persistent_fid,
+		io_parms->tcon->tid, io_parms->tcon->ses->Suid,
+		io_parms->offset, io_parms->length);
+
 	iov[0].iov_base = (char *)req;
 	/* 1 for Buffer */
 	iov[0].iov_len = total_len - 1;
@@ -3684,7 +3847,6 @@ SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
 
 	rc = cifs_send_recv(xid, io_parms->tcon->ses, &rqst,
 			    &resp_buftype, flags, &rsp_iov);
-	cifs_small_buf_release(req);
 	rsp = (struct smb2_write_rsp *)rsp_iov.iov_base;
 
 	if (rc) {
@@ -3702,6 +3864,7 @@ SMB2_write(const unsigned int xid, struct cifs_io_parms *io_parms,
 				     io_parms->offset, *nbytes);
 	}
 
+	cifs_small_buf_release(req);
 	free_rsp_buf(resp_buftype, rsp);
 	return rc;
 }
@@ -3836,6 +3999,9 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
 	rqst.rq_iov = iov;
 	rqst.rq_nvec = 2;
 
+	trace_smb3_query_dir_enter(xid, persistent_fid, tcon->tid,
+			tcon->ses->Suid, index, output_size);
+
 	rc = cifs_send_recv(xid, ses, &rqst, &resp_buftype, flags, &rsp_iov);
 	cifs_small_buf_release(req);
 	rsp = (struct smb2_query_directory_rsp *)rsp_iov.iov_base;
@@ -3843,18 +4009,26 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
 	if (rc) {
 		if (rc == -ENODATA &&
 		    rsp->sync_hdr.Status == STATUS_NO_MORE_FILES) {
+			trace_smb3_query_dir_done(xid, persistent_fid,
+				tcon->tid, tcon->ses->Suid, index, 0);
 			srch_inf->endOfSearch = true;
 			rc = 0;
-		} else
+		} else {
+			trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
+				tcon->ses->Suid, index, 0, rc);
 			cifs_stats_fail_inc(tcon, SMB2_QUERY_DIRECTORY_HE);
+		}
 		goto qdir_exit;
 	}
 
 	rc = smb2_validate_iov(le16_to_cpu(rsp->OutputBufferOffset),
 			       le32_to_cpu(rsp->OutputBufferLength), &rsp_iov,
 			       info_buf_size);
-	if (rc)
+	if (rc) {
+		trace_smb3_query_dir_err(xid, persistent_fid, tcon->tid,
+			tcon->ses->Suid, index, 0, rc);
 		goto qdir_exit;
+	}
 
 	srch_inf->unicode = true;
 
@@ -3882,6 +4056,8 @@ SMB2_query_directory(const unsigned int xid, struct cifs_tcon *tcon,
 	else
 		cifs_dbg(VFS, "illegal search buffer type\n");
 
+	trace_smb3_query_dir_done(xid, persistent_fid, tcon->tid,
+			tcon->ses->Suid, index, srch_inf->entries_in_buffer);
 	return rc;
 
 qdir_exit:
@@ -4062,7 +4238,7 @@ SMB2_oplock_break(const unsigned int xid, struct cifs_tcon *tcon,
 	req->OplockLevel = oplock_level;
 	req->sync_hdr.CreditRequest = cpu_to_le16(1);
 
-	flags |= CIFS_NO_RESP;
+	flags |= CIFS_NO_RSP_BUF;
 
 	iov[0].iov_base = (char *)req;
 	iov[0].iov_len = total_len;
@@ -4336,7 +4512,7 @@ smb2_lockv(const unsigned int xid, struct cifs_tcon *tcon,
 	struct kvec rsp_iov;
 	int resp_buf_type;
 	unsigned int count;
-	int flags = CIFS_NO_RESP;
+	int flags = CIFS_NO_RSP_BUF;
 	unsigned int total_len;
 
 	cifs_dbg(FYI, "smb2_lockv num lock %d\n", num_lock);
@@ -4429,7 +4605,7 @@ SMB2_lease_break(const unsigned int xid, struct cifs_tcon *tcon,
 	memcpy(req->LeaseKey, lease_key, 16);
 	req->LeaseState = lease_state;
 
-	flags |= CIFS_NO_RESP;
+	flags |= CIFS_NO_RSP_BUF;
 
 	iov[0].iov_base = (char *)req;
 	iov[0].iov_len = total_len;
diff --git a/fs/cifs/smb2pdu.h b/fs/cifs/smb2pdu.h
index 538e2299805f..858353d20c39 100644
--- a/fs/cifs/smb2pdu.h
+++ b/fs/cifs/smb2pdu.h
@@ -251,6 +251,14 @@ struct smb2_negotiate_req {
 #define SMB2_NT_FIND			0x00100000
 #define SMB2_LARGE_FILES		0x00200000
 
+
+/* Negotiate Contexts - ContextTypes. See MS-SMB2 section 2.2.3.1 for details */
+#define SMB2_PREAUTH_INTEGRITY_CAPABILITIES	cpu_to_le16(1)
+#define SMB2_ENCRYPTION_CAPABILITIES		cpu_to_le16(2)
+#define SMB2_COMPRESSION_CAPABILITIES		cpu_to_le16(3)
+#define SMB2_NETNAME_NEGOTIATE_CONTEXT_ID	cpu_to_le16(5)
+#define SMB2_POSIX_EXTENSIONS_AVAILABLE		cpu_to_le16(0x100)
+
 struct smb2_neg_context {
 	__le16	ContextType;
 	__le16	DataLength;
@@ -288,12 +296,33 @@ struct smb2_encryption_neg_context {
 	__le16	Ciphers[1]; /* Ciphers[0] since only one used now */
 } __packed;
 
-#define POSIX_CTXT_DATA_LEN	8
+/* See MS-SMB2 2.2.3.1.3 */
+#define SMB3_COMPRESS_NONE	cpu_to_le16(0x0000)
+#define SMB3_COMPRESS_LZNT1	cpu_to_le16(0x0001)
+#define SMB3_COMPRESS_LZ77	cpu_to_le16(0x0002)
+#define SMB3_COMPRESS_LZ77_HUFF	cpu_to_le16(0x0003)
+
+struct smb2_compression_capabilities_context {
+	__le16	ContextType; /* 3 */
+	__le16  DataLength;
+	__u32	Reserved;
+	__le16	CompressionAlgorithmCount;
+	__u16	Padding;
+	__u32	Reserved1;
+	__le16	CompressionAlgorithms[3];
+} __packed;
+
+/*
+ * For smb2_netname_negotiate_context_id See MS-SMB2 2.2.3.1.4.
+ * Its struct simply contains NetName, an array of Unicode characters
+ */
+
+#define POSIX_CTXT_DATA_LEN	16
 struct smb2_posix_neg_context {
 	__le16	ContextType; /* 0x100 */
 	__le16	DataLength;
 	__le32	Reserved;
-	__le64	Reserved1; /* In case needed for future (eg version or caps) */
+	__u8	Name[16]; /* POSIX ctxt GUID 93AD25509CB411E7B42383DE968BCD7C */
 } __packed;
 
 struct smb2_negotiate_rsp {
@@ -842,6 +871,11 @@ struct fsctl_get_integrity_information_rsp {
 	__le32	ClusterSizeInBytes;
 } __packed;
 
+struct file_allocated_range_buffer {
+	__le64	file_offset;
+	__le64	length;
+} __packed;
+
 /* Integrity ChecksumAlgorithm choices for above */
 #define	CHECKSUM_TYPE_NONE	0x0000
 #define	CHECKSUM_TYPE_CRC64	0x0002
@@ -880,7 +914,19 @@ struct reparse_mount_point_data_buffer {
 	__u8	PathBuffer[0]; /* Variable Length */
 } __packed;
 
-/* See MS-FSCC 2.1.2.4 and cifspdu.h for struct reparse_symlink_data */
+#define SYMLINK_FLAG_RELATIVE 0x00000001
+
+struct reparse_symlink_data_buffer {
+	__le32	ReparseTag;
+	__le16	ReparseDataLength;
+	__u16	Reserved;
+	__le16	SubstituteNameOffset;
+	__le16	SubstituteNameLength;
+	__le16	PrintNameOffset;
+	__le16	PrintNameLength;
+	__le32	Flags;
+	__u8	PathBuffer[0]; /* Variable Length */
+} __packed;
 
 /* See MS-FSCC 2.1.2.6 and cifspdu.h for struct reparse_posix_data */
 
@@ -959,6 +1005,13 @@ struct duplicate_extents_to_file {
 	__le64 ByteCount;  /* Bytes to be copied */
 } __packed;
 
+/*
+ * Maximum number of iovs we need for an ioctl request.
+ * [0] : struct smb2_ioctl_req
+ * [1] : in_data
+ */
+#define SMB2_IOCTL_IOV_SIZE 2
+
 struct smb2_ioctl_req {
 	struct smb2_sync_hdr sync_hdr;
 	__le16 StructureSize;	/* Must be 57 */
@@ -1040,6 +1093,7 @@ struct smb2_flush_rsp {
 
 /* For read request Flags field below, following flag is defined for SMB3.02 */
 #define SMB2_READFLAG_READ_UNBUFFERED	0x01
+#define SMB2_READFLAG_REQUEST_COMPRESSED 0x02 /* See MS-SMB2 2.2.19 */
 
 /* Channel field for read and write: exactly one of following flags can be set*/
 #define SMB2_CHANNEL_NONE	cpu_to_le32(0x00000000)
@@ -1106,6 +1160,42 @@ struct smb2_write_rsp {
 	__u8   Buffer[1];
 } __packed;
 
+/* notify flags */
+#define SMB2_WATCH_TREE			0x0001
+
+/* notify completion filter flags. See MS-FSCC 2.6 and MS-SMB2 2.2.35 */
+#define FILE_NOTIFY_CHANGE_FILE_NAME		0x00000001
+#define FILE_NOTIFY_CHANGE_DIR_NAME		0x00000002
+#define FILE_NOTIFY_CHANGE_ATTRIBUTES		0x00000004
+#define FILE_NOTIFY_CHANGE_SIZE			0x00000008
+#define FILE_NOTIFY_CHANGE_LAST_WRITE		0x00000010
+#define FILE_NOTIFY_CHANGE_LAST_ACCESS		0x00000020
+#define FILE_NOTIFY_CHANGE_CREATION		0x00000040
+#define FILE_NOTIFY_CHANGE_EA			0x00000080
+#define FILE_NOTIFY_CHANGE_SECURITY		0x00000100
+#define FILE_NOTIFY_CHANGE_STREAM_NAME		0x00000200
+#define FILE_NOTIFY_CHANGE_STREAM_SIZE		0x00000400
+#define FILE_NOTIFY_CHANGE_STREAM_WRITE		0x00000800
+
+struct smb2_change_notify_req {
+	struct smb2_sync_hdr sync_hdr;
+	__le16	StructureSize;
+	__le16	Flags;
+	__le32	OutputBufferLength;
+	__u64	PersistentFileId; /* opaque endianness */
+	__u64	VolatileFileId; /* opaque endianness */
+	__le32	CompletionFilter;
+	__u32	Reserved;
+} __packed;
+
+struct smb2_change_notify_rsp {
+	struct smb2_sync_hdr sync_hdr;
+	__le16	StructureSize;  /* Must be 9 */
+	__le16	OutputBufferOffset;
+	__le32	OutputBufferLength;
+	__u8	Buffer[1]; /* array of file notify structs */
+} __packed;
+
 #define SMB2_LOCKFLAG_SHARED_LOCK	0x0001
 #define SMB2_LOCKFLAG_EXCLUSIVE_LOCK	0x0002
 #define SMB2_LOCKFLAG_UNLOCK		0x0004
diff --git a/fs/cifs/smb2proto.h b/fs/cifs/smb2proto.h
index 87733b27a65f..52df125e9189 100644
--- a/fs/cifs/smb2proto.h
+++ b/fs/cifs/smb2proto.h
@@ -142,8 +142,13 @@ extern int SMB2_open_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
 extern void SMB2_open_free(struct smb_rqst *rqst);
 extern int SMB2_ioctl(const unsigned int xid, struct cifs_tcon *tcon,
 		     u64 persistent_fid, u64 volatile_fid, u32 opcode,
-		     bool is_fsctl, char *in_data, u32 indatalen,
+		     bool is_fsctl, char *in_data, u32 indatalen, u32 maxoutlen,
 		     char **out_data, u32 *plen /* returned data len */);
+extern int SMB2_ioctl_init(struct cifs_tcon *tcon, struct smb_rqst *rqst,
+			   u64 persistent_fid, u64 volatile_fid, u32 opcode,
+			   bool is_fsctl, char *in_data, u32 indatalen,
+			   __u32 max_response_size);
+extern void SMB2_ioctl_free(struct smb_rqst *rqst);
 extern int SMB2_close(const unsigned int xid, struct cifs_tcon *tcon,
 		      u64 persistent_file_id, u64 volatile_file_id);
 extern int SMB2_close_flags(const unsigned int xid, struct cifs_tcon *tcon,
@@ -223,6 +228,9 @@ extern int smb3_validate_negotiate(const unsigned int, struct cifs_tcon *);
 
 extern enum securityEnum smb2_select_sectype(struct TCP_Server_Info *,
 					enum securityEnum);
+extern __u8 smb2_parse_lease_state(struct TCP_Server_Info *server,
+				   struct smb2_create_rsp *rsp,
+				   unsigned int *epoch, char *lease_key);
 extern int smb3_encryption_required(const struct cifs_tcon *tcon);
 extern int smb2_validate_iov(unsigned int offset, unsigned int buffer_length,
 			     struct kvec *iov, unsigned int min_buf_size);
diff --git a/fs/cifs/smb2status.h b/fs/cifs/smb2status.h
index 3d5f62150de4..7505056e9580 100644
--- a/fs/cifs/smb2status.h
+++ b/fs/cifs/smb2status.h
@@ -30,9 +30,9 @@
  */
 
 #define STATUS_SEVERITY_SUCCESS __constant_cpu_to_le32(0x0000)
-#define STATUS_SEVERITY_INFORMATIONAL __constanst_cpu_to_le32(0x0001)
-#define STATUS_SEVERITY_WARNING __constanst_cpu_to_le32(0x0002)
-#define STATUS_SEVERITY_ERROR __constanst_cpu_to_le32(0x0003)
+#define STATUS_SEVERITY_INFORMATIONAL cpu_to_le32(0x0001)
+#define STATUS_SEVERITY_WARNING cpu_to_le32(0x0002)
+#define STATUS_SEVERITY_ERROR cpu_to_le32(0x0003)
 
 struct ntstatus {
 	/* Facility is the high 12 bits of the following field */
@@ -40,1743 +40,1743 @@ struct ntstatus {
 	__le32 Code;
 };
 
-#define STATUS_SUCCESS __constant_cpu_to_le32(0x00000000)
-#define STATUS_WAIT_0 __constant_cpu_to_le32(0x00000000)
-#define STATUS_WAIT_1 __constant_cpu_to_le32(0x00000001)
-#define STATUS_WAIT_2 __constant_cpu_to_le32(0x00000002)
-#define STATUS_WAIT_3 __constant_cpu_to_le32(0x00000003)
-#define STATUS_WAIT_63 __constant_cpu_to_le32(0x0000003F)
-#define STATUS_ABANDONED __constant_cpu_to_le32(0x00000080)
-#define STATUS_ABANDONED_WAIT_0 __constant_cpu_to_le32(0x00000080)
-#define STATUS_ABANDONED_WAIT_63 __constant_cpu_to_le32(0x000000BF)
-#define STATUS_USER_APC __constant_cpu_to_le32(0x000000C0)
-#define STATUS_KERNEL_APC __constant_cpu_to_le32(0x00000100)
-#define STATUS_ALERTED __constant_cpu_to_le32(0x00000101)
-#define STATUS_TIMEOUT __constant_cpu_to_le32(0x00000102)
-#define STATUS_PENDING __constant_cpu_to_le32(0x00000103)
-#define STATUS_REPARSE __constant_cpu_to_le32(0x00000104)
-#define STATUS_MORE_ENTRIES __constant_cpu_to_le32(0x00000105)
-#define STATUS_NOT_ALL_ASSIGNED __constant_cpu_to_le32(0x00000106)
-#define STATUS_SOME_NOT_MAPPED __constant_cpu_to_le32(0x00000107)
-#define STATUS_OPLOCK_BREAK_IN_PROGRESS __constant_cpu_to_le32(0x00000108)
-#define STATUS_VOLUME_MOUNTED __constant_cpu_to_le32(0x00000109)
-#define STATUS_RXACT_COMMITTED __constant_cpu_to_le32(0x0000010A)
-#define STATUS_NOTIFY_CLEANUP __constant_cpu_to_le32(0x0000010B)
-#define STATUS_NOTIFY_ENUM_DIR __constant_cpu_to_le32(0x0000010C)
-#define STATUS_NO_QUOTAS_FOR_ACCOUNT __constant_cpu_to_le32(0x0000010D)
-#define STATUS_PRIMARY_TRANSPORT_CONNECT_FAILED __constant_cpu_to_le32(0x0000010E)
-#define STATUS_PAGE_FAULT_TRANSITION __constant_cpu_to_le32(0x00000110)
-#define STATUS_PAGE_FAULT_DEMAND_ZERO __constant_cpu_to_le32(0x00000111)
-#define STATUS_PAGE_FAULT_COPY_ON_WRITE __constant_cpu_to_le32(0x00000112)
-#define STATUS_PAGE_FAULT_GUARD_PAGE __constant_cpu_to_le32(0x00000113)
-#define STATUS_PAGE_FAULT_PAGING_FILE __constant_cpu_to_le32(0x00000114)
-#define STATUS_CACHE_PAGE_LOCKED __constant_cpu_to_le32(0x00000115)
-#define STATUS_CRASH_DUMP __constant_cpu_to_le32(0x00000116)
-#define STATUS_BUFFER_ALL_ZEROS __constant_cpu_to_le32(0x00000117)
-#define STATUS_REPARSE_OBJECT __constant_cpu_to_le32(0x00000118)
-#define STATUS_RESOURCE_REQUIREMENTS_CHANGED __constant_cpu_to_le32(0x00000119)
-#define STATUS_TRANSLATION_COMPLETE __constant_cpu_to_le32(0x00000120)
-#define STATUS_DS_MEMBERSHIP_EVALUATED_LOCALLY __constant_cpu_to_le32(0x00000121)
-#define STATUS_NOTHING_TO_TERMINATE __constant_cpu_to_le32(0x00000122)
-#define STATUS_PROCESS_NOT_IN_JOB __constant_cpu_to_le32(0x00000123)
-#define STATUS_PROCESS_IN_JOB __constant_cpu_to_le32(0x00000124)
-#define STATUS_VOLSNAP_HIBERNATE_READY __constant_cpu_to_le32(0x00000125)
-#define STATUS_FSFILTER_OP_COMPLETED_SUCCESSFULLY __constant_cpu_to_le32(0x00000126)
-#define STATUS_INTERRUPT_VECTOR_ALREADY_CONNECTED __constant_cpu_to_le32(0x00000127)
-#define STATUS_INTERRUPT_STILL_CONNECTED __constant_cpu_to_le32(0x00000128)
-#define STATUS_PROCESS_CLONED __constant_cpu_to_le32(0x00000129)
-#define STATUS_FILE_LOCKED_WITH_ONLY_READERS __constant_cpu_to_le32(0x0000012A)
-#define STATUS_FILE_LOCKED_WITH_WRITERS __constant_cpu_to_le32(0x0000012B)
-#define STATUS_RESOURCEMANAGER_READ_ONLY __constant_cpu_to_le32(0x00000202)
-#define STATUS_WAIT_FOR_OPLOCK __constant_cpu_to_le32(0x00000367)
-#define DBG_EXCEPTION_HANDLED __constant_cpu_to_le32(0x00010001)
-#define DBG_CONTINUE __constant_cpu_to_le32(0x00010002)
-#define STATUS_FLT_IO_COMPLETE __constant_cpu_to_le32(0x001C0001)
-#define STATUS_OBJECT_NAME_EXISTS __constant_cpu_to_le32(0x40000000)
-#define STATUS_THREAD_WAS_SUSPENDED __constant_cpu_to_le32(0x40000001)
-#define STATUS_WORKING_SET_LIMIT_RANGE __constant_cpu_to_le32(0x40000002)
-#define STATUS_IMAGE_NOT_AT_BASE __constant_cpu_to_le32(0x40000003)
-#define STATUS_RXACT_STATE_CREATED __constant_cpu_to_le32(0x40000004)
-#define STATUS_SEGMENT_NOTIFICATION __constant_cpu_to_le32(0x40000005)
-#define STATUS_LOCAL_USER_SESSION_KEY __constant_cpu_to_le32(0x40000006)
-#define STATUS_BAD_CURRENT_DIRECTORY __constant_cpu_to_le32(0x40000007)
-#define STATUS_SERIAL_MORE_WRITES __constant_cpu_to_le32(0x40000008)
-#define STATUS_REGISTRY_RECOVERED __constant_cpu_to_le32(0x40000009)
-#define STATUS_FT_READ_RECOVERY_FROM_BACKUP __constant_cpu_to_le32(0x4000000A)
-#define STATUS_FT_WRITE_RECOVERY __constant_cpu_to_le32(0x4000000B)
-#define STATUS_SERIAL_COUNTER_TIMEOUT __constant_cpu_to_le32(0x4000000C)
-#define STATUS_NULL_LM_PASSWORD __constant_cpu_to_le32(0x4000000D)
-#define STATUS_IMAGE_MACHINE_TYPE_MISMATCH __constant_cpu_to_le32(0x4000000E)
-#define STATUS_RECEIVE_PARTIAL __constant_cpu_to_le32(0x4000000F)
-#define STATUS_RECEIVE_EXPEDITED __constant_cpu_to_le32(0x40000010)
-#define STATUS_RECEIVE_PARTIAL_EXPEDITED __constant_cpu_to_le32(0x40000011)
-#define STATUS_EVENT_DONE __constant_cpu_to_le32(0x40000012)
-#define STATUS_EVENT_PENDING __constant_cpu_to_le32(0x40000013)
-#define STATUS_CHECKING_FILE_SYSTEM __constant_cpu_to_le32(0x40000014)
-#define STATUS_FATAL_APP_EXIT __constant_cpu_to_le32(0x40000015)
-#define STATUS_PREDEFINED_HANDLE __constant_cpu_to_le32(0x40000016)
-#define STATUS_WAS_UNLOCKED __constant_cpu_to_le32(0x40000017)
-#define STATUS_SERVICE_NOTIFICATION __constant_cpu_to_le32(0x40000018)
-#define STATUS_WAS_LOCKED __constant_cpu_to_le32(0x40000019)
-#define STATUS_LOG_HARD_ERROR __constant_cpu_to_le32(0x4000001A)
-#define STATUS_ALREADY_WIN32 __constant_cpu_to_le32(0x4000001B)
-#define STATUS_WX86_UNSIMULATE __constant_cpu_to_le32(0x4000001C)
-#define STATUS_WX86_CONTINUE __constant_cpu_to_le32(0x4000001D)
-#define STATUS_WX86_SINGLE_STEP __constant_cpu_to_le32(0x4000001E)
-#define STATUS_WX86_BREAKPOINT __constant_cpu_to_le32(0x4000001F)
-#define STATUS_WX86_EXCEPTION_CONTINUE __constant_cpu_to_le32(0x40000020)
-#define STATUS_WX86_EXCEPTION_LASTCHANCE __constant_cpu_to_le32(0x40000021)
-#define STATUS_WX86_EXCEPTION_CHAIN __constant_cpu_to_le32(0x40000022)
-#define STATUS_IMAGE_MACHINE_TYPE_MISMATCH_EXE __constant_cpu_to_le32(0x40000023)
-#define STATUS_NO_YIELD_PERFORMED __constant_cpu_to_le32(0x40000024)
-#define STATUS_TIMER_RESUME_IGNORED __constant_cpu_to_le32(0x40000025)
-#define STATUS_ARBITRATION_UNHANDLED __constant_cpu_to_le32(0x40000026)
-#define STATUS_CARDBUS_NOT_SUPPORTED __constant_cpu_to_le32(0x40000027)
-#define STATUS_WX86_CREATEWX86TIB __constant_cpu_to_le32(0x40000028)
-#define STATUS_MP_PROCESSOR_MISMATCH __constant_cpu_to_le32(0x40000029)
-#define STATUS_HIBERNATED __constant_cpu_to_le32(0x4000002A)
-#define STATUS_RESUME_HIBERNATION __constant_cpu_to_le32(0x4000002B)
-#define STATUS_FIRMWARE_UPDATED __constant_cpu_to_le32(0x4000002C)
-#define STATUS_DRIVERS_LEAKING_LOCKED_PAGES __constant_cpu_to_le32(0x4000002D)
-#define STATUS_MESSAGE_RETRIEVED __constant_cpu_to_le32(0x4000002E)
-#define STATUS_SYSTEM_POWERSTATE_TRANSITION __constant_cpu_to_le32(0x4000002F)
-#define STATUS_ALPC_CHECK_COMPLETION_LIST __constant_cpu_to_le32(0x40000030)
-#define STATUS_SYSTEM_POWERSTATE_COMPLEX_TRANSITION __constant_cpu_to_le32(0x40000031)
-#define STATUS_ACCESS_AUDIT_BY_POLICY __constant_cpu_to_le32(0x40000032)
-#define STATUS_ABANDON_HIBERFILE __constant_cpu_to_le32(0x40000033)
-#define STATUS_BIZRULES_NOT_ENABLED __constant_cpu_to_le32(0x40000034)
-#define STATUS_WAKE_SYSTEM __constant_cpu_to_le32(0x40000294)
-#define STATUS_DS_SHUTTING_DOWN __constant_cpu_to_le32(0x40000370)
-#define DBG_REPLY_LATER __constant_cpu_to_le32(0x40010001)
-#define DBG_UNABLE_TO_PROVIDE_HANDLE __constant_cpu_to_le32(0x40010002)
-#define DBG_TERMINATE_THREAD __constant_cpu_to_le32(0x40010003)
-#define DBG_TERMINATE_PROCESS __constant_cpu_to_le32(0x40010004)
-#define DBG_CONTROL_C __constant_cpu_to_le32(0x40010005)
-#define DBG_PRINTEXCEPTION_C __constant_cpu_to_le32(0x40010006)
-#define DBG_RIPEXCEPTION __constant_cpu_to_le32(0x40010007)
-#define DBG_CONTROL_BREAK __constant_cpu_to_le32(0x40010008)
-#define DBG_COMMAND_EXCEPTION __constant_cpu_to_le32(0x40010009)
-#define RPC_NT_UUID_LOCAL_ONLY __constant_cpu_to_le32(0x40020056)
-#define RPC_NT_SEND_INCOMPLETE __constant_cpu_to_le32(0x400200AF)
-#define STATUS_CTX_CDM_CONNECT __constant_cpu_to_le32(0x400A0004)
-#define STATUS_CTX_CDM_DISCONNECT __constant_cpu_to_le32(0x400A0005)
-#define STATUS_SXS_RELEASE_ACTIVATION_CONTEXT __constant_cpu_to_le32(0x4015000D)
-#define STATUS_RECOVERY_NOT_NEEDED __constant_cpu_to_le32(0x40190034)
-#define STATUS_RM_ALREADY_STARTED __constant_cpu_to_le32(0x40190035)
-#define STATUS_LOG_NO_RESTART __constant_cpu_to_le32(0x401A000C)
-#define STATUS_VIDEO_DRIVER_DEBUG_REPORT_REQUEST __constant_cpu_to_le32(0x401B00EC)
-#define STATUS_GRAPHICS_PARTIAL_DATA_POPULATED __constant_cpu_to_le32(0x401E000A)
-#define STATUS_GRAPHICS_DRIVER_MISMATCH __constant_cpu_to_le32(0x401E0117)
-#define STATUS_GRAPHICS_MODE_NOT_PINNED __constant_cpu_to_le32(0x401E0307)
-#define STATUS_GRAPHICS_NO_PREFERRED_MODE __constant_cpu_to_le32(0x401E031E)
-#define STATUS_GRAPHICS_DATASET_IS_EMPTY __constant_cpu_to_le32(0x401E034B)
-#define STATUS_GRAPHICS_NO_MORE_ELEMENTS_IN_DATASET __constant_cpu_to_le32(0x401E034C)
-#define STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_PINNED __constant_cpu_to_le32(0x401E0351)
-#define STATUS_GRAPHICS_UNKNOWN_CHILD_STATUS __constant_cpu_to_le32(0x401E042F)
-#define STATUS_GRAPHICS_LEADLINK_START_DEFERRED __constant_cpu_to_le32(0x401E0437)
-#define STATUS_GRAPHICS_POLLING_TOO_FREQUENTLY __constant_cpu_to_le32(0x401E0439)
-#define STATUS_GRAPHICS_START_DEFERRED __constant_cpu_to_le32(0x401E043A)
-#define STATUS_NDIS_INDICATION_REQUIRED __constant_cpu_to_le32(0x40230001)
-#define STATUS_GUARD_PAGE_VIOLATION __constant_cpu_to_le32(0x80000001)
-#define STATUS_DATATYPE_MISALIGNMENT __constant_cpu_to_le32(0x80000002)
-#define STATUS_BREAKPOINT __constant_cpu_to_le32(0x80000003)
-#define STATUS_SINGLE_STEP __constant_cpu_to_le32(0x80000004)
-#define STATUS_BUFFER_OVERFLOW __constant_cpu_to_le32(0x80000005)
-#define STATUS_NO_MORE_FILES __constant_cpu_to_le32(0x80000006)
-#define STATUS_WAKE_SYSTEM_DEBUGGER __constant_cpu_to_le32(0x80000007)
-#define STATUS_HANDLES_CLOSED __constant_cpu_to_le32(0x8000000A)
-#define STATUS_NO_INHERITANCE __constant_cpu_to_le32(0x8000000B)
-#define STATUS_GUID_SUBSTITUTION_MADE __constant_cpu_to_le32(0x8000000C)
-#define STATUS_PARTIAL_COPY __constant_cpu_to_le32(0x8000000D)
-#define STATUS_DEVICE_PAPER_EMPTY __constant_cpu_to_le32(0x8000000E)
-#define STATUS_DEVICE_POWERED_OFF __constant_cpu_to_le32(0x8000000F)
-#define STATUS_DEVICE_OFF_LINE __constant_cpu_to_le32(0x80000010)
-#define STATUS_DEVICE_BUSY __constant_cpu_to_le32(0x80000011)
-#define STATUS_NO_MORE_EAS __constant_cpu_to_le32(0x80000012)
-#define STATUS_INVALID_EA_NAME __constant_cpu_to_le32(0x80000013)
-#define STATUS_EA_LIST_INCONSISTENT __constant_cpu_to_le32(0x80000014)
-#define STATUS_INVALID_EA_FLAG __constant_cpu_to_le32(0x80000015)
-#define STATUS_VERIFY_REQUIRED __constant_cpu_to_le32(0x80000016)
-#define STATUS_EXTRANEOUS_INFORMATION __constant_cpu_to_le32(0x80000017)
-#define STATUS_RXACT_COMMIT_NECESSARY __constant_cpu_to_le32(0x80000018)
-#define STATUS_NO_MORE_ENTRIES __constant_cpu_to_le32(0x8000001A)
-#define STATUS_FILEMARK_DETECTED __constant_cpu_to_le32(0x8000001B)
-#define STATUS_MEDIA_CHANGED __constant_cpu_to_le32(0x8000001C)
-#define STATUS_BUS_RESET __constant_cpu_to_le32(0x8000001D)
-#define STATUS_END_OF_MEDIA __constant_cpu_to_le32(0x8000001E)
-#define STATUS_BEGINNING_OF_MEDIA __constant_cpu_to_le32(0x8000001F)
-#define STATUS_MEDIA_CHECK __constant_cpu_to_le32(0x80000020)
-#define STATUS_SETMARK_DETECTED __constant_cpu_to_le32(0x80000021)
-#define STATUS_NO_DATA_DETECTED __constant_cpu_to_le32(0x80000022)
-#define STATUS_REDIRECTOR_HAS_OPEN_HANDLES __constant_cpu_to_le32(0x80000023)
-#define STATUS_SERVER_HAS_OPEN_HANDLES __constant_cpu_to_le32(0x80000024)
-#define STATUS_ALREADY_DISCONNECTED __constant_cpu_to_le32(0x80000025)
-#define STATUS_LONGJUMP __constant_cpu_to_le32(0x80000026)
-#define STATUS_CLEANER_CARTRIDGE_INSTALLED __constant_cpu_to_le32(0x80000027)
-#define STATUS_PLUGPLAY_QUERY_VETOED __constant_cpu_to_le32(0x80000028)
-#define STATUS_UNWIND_CONSOLIDATE __constant_cpu_to_le32(0x80000029)
-#define STATUS_REGISTRY_HIVE_RECOVERED __constant_cpu_to_le32(0x8000002A)
-#define STATUS_DLL_MIGHT_BE_INSECURE __constant_cpu_to_le32(0x8000002B)
-#define STATUS_DLL_MIGHT_BE_INCOMPATIBLE __constant_cpu_to_le32(0x8000002C)
-#define STATUS_STOPPED_ON_SYMLINK __constant_cpu_to_le32(0x8000002D)
-#define STATUS_DEVICE_REQUIRES_CLEANING __constant_cpu_to_le32(0x80000288)
-#define STATUS_DEVICE_DOOR_OPEN __constant_cpu_to_le32(0x80000289)
-#define STATUS_DATA_LOST_REPAIR __constant_cpu_to_le32(0x80000803)
-#define DBG_EXCEPTION_NOT_HANDLED __constant_cpu_to_le32(0x80010001)
-#define STATUS_CLUSTER_NODE_ALREADY_UP __constant_cpu_to_le32(0x80130001)
-#define STATUS_CLUSTER_NODE_ALREADY_DOWN __constant_cpu_to_le32(0x80130002)
-#define STATUS_CLUSTER_NETWORK_ALREADY_ONLINE __constant_cpu_to_le32(0x80130003)
-#define STATUS_CLUSTER_NETWORK_ALREADY_OFFLINE __constant_cpu_to_le32(0x80130004)
-#define STATUS_CLUSTER_NODE_ALREADY_MEMBER __constant_cpu_to_le32(0x80130005)
-#define STATUS_COULD_NOT_RESIZE_LOG __constant_cpu_to_le32(0x80190009)
-#define STATUS_NO_TXF_METADATA __constant_cpu_to_le32(0x80190029)
-#define STATUS_CANT_RECOVER_WITH_HANDLE_OPEN __constant_cpu_to_le32(0x80190031)
-#define STATUS_TXF_METADATA_ALREADY_PRESENT __constant_cpu_to_le32(0x80190041)
-#define STATUS_TRANSACTION_SCOPE_CALLBACKS_NOT_SET __constant_cpu_to_le32(0x80190042)
-#define STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD_RECOVERED __constant_cpu_to_le32(0x801B00EB)
-#define STATUS_FLT_BUFFER_TOO_SMALL __constant_cpu_to_le32(0x801C0001)
-#define STATUS_FVE_PARTIAL_METADATA __constant_cpu_to_le32(0x80210001)
-#define STATUS_UNSUCCESSFUL __constant_cpu_to_le32(0xC0000001)
-#define STATUS_NOT_IMPLEMENTED __constant_cpu_to_le32(0xC0000002)
-#define STATUS_INVALID_INFO_CLASS __constant_cpu_to_le32(0xC0000003)
-#define STATUS_INFO_LENGTH_MISMATCH __constant_cpu_to_le32(0xC0000004)
-#define STATUS_ACCESS_VIOLATION __constant_cpu_to_le32(0xC0000005)
-#define STATUS_IN_PAGE_ERROR __constant_cpu_to_le32(0xC0000006)
-#define STATUS_PAGEFILE_QUOTA __constant_cpu_to_le32(0xC0000007)
-#define STATUS_INVALID_HANDLE __constant_cpu_to_le32(0xC0000008)
-#define STATUS_BAD_INITIAL_STACK __constant_cpu_to_le32(0xC0000009)
-#define STATUS_BAD_INITIAL_PC __constant_cpu_to_le32(0xC000000A)
-#define STATUS_INVALID_CID __constant_cpu_to_le32(0xC000000B)
-#define STATUS_TIMER_NOT_CANCELED __constant_cpu_to_le32(0xC000000C)
-#define STATUS_INVALID_PARAMETER __constant_cpu_to_le32(0xC000000D)
-#define STATUS_NO_SUCH_DEVICE __constant_cpu_to_le32(0xC000000E)
-#define STATUS_NO_SUCH_FILE __constant_cpu_to_le32(0xC000000F)
-#define STATUS_INVALID_DEVICE_REQUEST __constant_cpu_to_le32(0xC0000010)
-#define STATUS_END_OF_FILE __constant_cpu_to_le32(0xC0000011)
-#define STATUS_WRONG_VOLUME __constant_cpu_to_le32(0xC0000012)
-#define STATUS_NO_MEDIA_IN_DEVICE __constant_cpu_to_le32(0xC0000013)
-#define STATUS_UNRECOGNIZED_MEDIA __constant_cpu_to_le32(0xC0000014)
-#define STATUS_NONEXISTENT_SECTOR __constant_cpu_to_le32(0xC0000015)
-#define STATUS_MORE_PROCESSING_REQUIRED __constant_cpu_to_le32(0xC0000016)
-#define STATUS_NO_MEMORY __constant_cpu_to_le32(0xC0000017)
-#define STATUS_CONFLICTING_ADDRESSES __constant_cpu_to_le32(0xC0000018)
-#define STATUS_NOT_MAPPED_VIEW __constant_cpu_to_le32(0xC0000019)
-#define STATUS_UNABLE_TO_FREE_VM __constant_cpu_to_le32(0xC000001A)
-#define STATUS_UNABLE_TO_DELETE_SECTION __constant_cpu_to_le32(0xC000001B)
-#define STATUS_INVALID_SYSTEM_SERVICE __constant_cpu_to_le32(0xC000001C)
-#define STATUS_ILLEGAL_INSTRUCTION __constant_cpu_to_le32(0xC000001D)
-#define STATUS_INVALID_LOCK_SEQUENCE __constant_cpu_to_le32(0xC000001E)
-#define STATUS_INVALID_VIEW_SIZE __constant_cpu_to_le32(0xC000001F)
-#define STATUS_INVALID_FILE_FOR_SECTION __constant_cpu_to_le32(0xC0000020)
-#define STATUS_ALREADY_COMMITTED __constant_cpu_to_le32(0xC0000021)
-#define STATUS_ACCESS_DENIED __constant_cpu_to_le32(0xC0000022)
-#define STATUS_BUFFER_TOO_SMALL __constant_cpu_to_le32(0xC0000023)
-#define STATUS_OBJECT_TYPE_MISMATCH __constant_cpu_to_le32(0xC0000024)
-#define STATUS_NONCONTINUABLE_EXCEPTION __constant_cpu_to_le32(0xC0000025)
-#define STATUS_INVALID_DISPOSITION __constant_cpu_to_le32(0xC0000026)
-#define STATUS_UNWIND __constant_cpu_to_le32(0xC0000027)
-#define STATUS_BAD_STACK __constant_cpu_to_le32(0xC0000028)
-#define STATUS_INVALID_UNWIND_TARGET __constant_cpu_to_le32(0xC0000029)
-#define STATUS_NOT_LOCKED __constant_cpu_to_le32(0xC000002A)
-#define STATUS_PARITY_ERROR __constant_cpu_to_le32(0xC000002B)
-#define STATUS_UNABLE_TO_DECOMMIT_VM __constant_cpu_to_le32(0xC000002C)
-#define STATUS_NOT_COMMITTED __constant_cpu_to_le32(0xC000002D)
-#define STATUS_INVALID_PORT_ATTRIBUTES __constant_cpu_to_le32(0xC000002E)
-#define STATUS_PORT_MESSAGE_TOO_LONG __constant_cpu_to_le32(0xC000002F)
-#define STATUS_INVALID_PARAMETER_MIX __constant_cpu_to_le32(0xC0000030)
-#define STATUS_INVALID_QUOTA_LOWER __constant_cpu_to_le32(0xC0000031)
-#define STATUS_DISK_CORRUPT_ERROR __constant_cpu_to_le32(0xC0000032)
-#define STATUS_OBJECT_NAME_INVALID __constant_cpu_to_le32(0xC0000033)
-#define STATUS_OBJECT_NAME_NOT_FOUND __constant_cpu_to_le32(0xC0000034)
-#define STATUS_OBJECT_NAME_COLLISION __constant_cpu_to_le32(0xC0000035)
-#define STATUS_PORT_DISCONNECTED __constant_cpu_to_le32(0xC0000037)
-#define STATUS_DEVICE_ALREADY_ATTACHED __constant_cpu_to_le32(0xC0000038)
-#define STATUS_OBJECT_PATH_INVALID __constant_cpu_to_le32(0xC0000039)
-#define STATUS_OBJECT_PATH_NOT_FOUND __constant_cpu_to_le32(0xC000003A)
-#define STATUS_OBJECT_PATH_SYNTAX_BAD __constant_cpu_to_le32(0xC000003B)
-#define STATUS_DATA_OVERRUN __constant_cpu_to_le32(0xC000003C)
-#define STATUS_DATA_LATE_ERROR __constant_cpu_to_le32(0xC000003D)
-#define STATUS_DATA_ERROR __constant_cpu_to_le32(0xC000003E)
-#define STATUS_CRC_ERROR __constant_cpu_to_le32(0xC000003F)
-#define STATUS_SECTION_TOO_BIG __constant_cpu_to_le32(0xC0000040)
-#define STATUS_PORT_CONNECTION_REFUSED __constant_cpu_to_le32(0xC0000041)
-#define STATUS_INVALID_PORT_HANDLE __constant_cpu_to_le32(0xC0000042)
-#define STATUS_SHARING_VIOLATION __constant_cpu_to_le32(0xC0000043)
-#define STATUS_QUOTA_EXCEEDED __constant_cpu_to_le32(0xC0000044)
-#define STATUS_INVALID_PAGE_PROTECTION __constant_cpu_to_le32(0xC0000045)
-#define STATUS_MUTANT_NOT_OWNED __constant_cpu_to_le32(0xC0000046)
-#define STATUS_SEMAPHORE_LIMIT_EXCEEDED __constant_cpu_to_le32(0xC0000047)
-#define STATUS_PORT_ALREADY_SET __constant_cpu_to_le32(0xC0000048)
-#define STATUS_SECTION_NOT_IMAGE __constant_cpu_to_le32(0xC0000049)
-#define STATUS_SUSPEND_COUNT_EXCEEDED __constant_cpu_to_le32(0xC000004A)
-#define STATUS_THREAD_IS_TERMINATING __constant_cpu_to_le32(0xC000004B)
-#define STATUS_BAD_WORKING_SET_LIMIT __constant_cpu_to_le32(0xC000004C)
-#define STATUS_INCOMPATIBLE_FILE_MAP __constant_cpu_to_le32(0xC000004D)
-#define STATUS_SECTION_PROTECTION __constant_cpu_to_le32(0xC000004E)
-#define STATUS_EAS_NOT_SUPPORTED __constant_cpu_to_le32(0xC000004F)
-#define STATUS_EA_TOO_LARGE __constant_cpu_to_le32(0xC0000050)
-#define STATUS_NONEXISTENT_EA_ENTRY __constant_cpu_to_le32(0xC0000051)
-#define STATUS_NO_EAS_ON_FILE __constant_cpu_to_le32(0xC0000052)
-#define STATUS_EA_CORRUPT_ERROR __constant_cpu_to_le32(0xC0000053)
-#define STATUS_FILE_LOCK_CONFLICT __constant_cpu_to_le32(0xC0000054)
-#define STATUS_LOCK_NOT_GRANTED __constant_cpu_to_le32(0xC0000055)
-#define STATUS_DELETE_PENDING __constant_cpu_to_le32(0xC0000056)
-#define STATUS_CTL_FILE_NOT_SUPPORTED __constant_cpu_to_le32(0xC0000057)
-#define STATUS_UNKNOWN_REVISION __constant_cpu_to_le32(0xC0000058)
-#define STATUS_REVISION_MISMATCH __constant_cpu_to_le32(0xC0000059)
-#define STATUS_INVALID_OWNER __constant_cpu_to_le32(0xC000005A)
-#define STATUS_INVALID_PRIMARY_GROUP __constant_cpu_to_le32(0xC000005B)
-#define STATUS_NO_IMPERSONATION_TOKEN __constant_cpu_to_le32(0xC000005C)
-#define STATUS_CANT_DISABLE_MANDATORY __constant_cpu_to_le32(0xC000005D)
-#define STATUS_NO_LOGON_SERVERS __constant_cpu_to_le32(0xC000005E)
-#define STATUS_NO_SUCH_LOGON_SESSION __constant_cpu_to_le32(0xC000005F)
-#define STATUS_NO_SUCH_PRIVILEGE __constant_cpu_to_le32(0xC0000060)
-#define STATUS_PRIVILEGE_NOT_HELD __constant_cpu_to_le32(0xC0000061)
-#define STATUS_INVALID_ACCOUNT_NAME __constant_cpu_to_le32(0xC0000062)
-#define STATUS_USER_EXISTS __constant_cpu_to_le32(0xC0000063)
-#define STATUS_NO_SUCH_USER __constant_cpu_to_le32(0xC0000064)
-#define STATUS_GROUP_EXISTS __constant_cpu_to_le32(0xC0000065)
-#define STATUS_NO_SUCH_GROUP __constant_cpu_to_le32(0xC0000066)
-#define STATUS_MEMBER_IN_GROUP __constant_cpu_to_le32(0xC0000067)
-#define STATUS_MEMBER_NOT_IN_GROUP __constant_cpu_to_le32(0xC0000068)
-#define STATUS_LAST_ADMIN __constant_cpu_to_le32(0xC0000069)
-#define STATUS_WRONG_PASSWORD __constant_cpu_to_le32(0xC000006A)
-#define STATUS_ILL_FORMED_PASSWORD __constant_cpu_to_le32(0xC000006B)
-#define STATUS_PASSWORD_RESTRICTION __constant_cpu_to_le32(0xC000006C)
-#define STATUS_LOGON_FAILURE __constant_cpu_to_le32(0xC000006D)
-#define STATUS_ACCOUNT_RESTRICTION __constant_cpu_to_le32(0xC000006E)
-#define STATUS_INVALID_LOGON_HOURS __constant_cpu_to_le32(0xC000006F)
-#define STATUS_INVALID_WORKSTATION __constant_cpu_to_le32(0xC0000070)
-#define STATUS_PASSWORD_EXPIRED __constant_cpu_to_le32(0xC0000071)
-#define STATUS_ACCOUNT_DISABLED __constant_cpu_to_le32(0xC0000072)
-#define STATUS_NONE_MAPPED __constant_cpu_to_le32(0xC0000073)
-#define STATUS_TOO_MANY_LUIDS_REQUESTED __constant_cpu_to_le32(0xC0000074)
-#define STATUS_LUIDS_EXHAUSTED __constant_cpu_to_le32(0xC0000075)
-#define STATUS_INVALID_SUB_AUTHORITY __constant_cpu_to_le32(0xC0000076)
-#define STATUS_INVALID_ACL __constant_cpu_to_le32(0xC0000077)
-#define STATUS_INVALID_SID __constant_cpu_to_le32(0xC0000078)
-#define STATUS_INVALID_SECURITY_DESCR __constant_cpu_to_le32(0xC0000079)
-#define STATUS_PROCEDURE_NOT_FOUND __constant_cpu_to_le32(0xC000007A)
-#define STATUS_INVALID_IMAGE_FORMAT __constant_cpu_to_le32(0xC000007B)
-#define STATUS_NO_TOKEN __constant_cpu_to_le32(0xC000007C)
-#define STATUS_BAD_INHERITANCE_ACL __constant_cpu_to_le32(0xC000007D)
-#define STATUS_RANGE_NOT_LOCKED __constant_cpu_to_le32(0xC000007E)
-#define STATUS_DISK_FULL __constant_cpu_to_le32(0xC000007F)
-#define STATUS_SERVER_DISABLED __constant_cpu_to_le32(0xC0000080)
-#define STATUS_SERVER_NOT_DISABLED __constant_cpu_to_le32(0xC0000081)
-#define STATUS_TOO_MANY_GUIDS_REQUESTED __constant_cpu_to_le32(0xC0000082)
-#define STATUS_GUIDS_EXHAUSTED __constant_cpu_to_le32(0xC0000083)
-#define STATUS_INVALID_ID_AUTHORITY __constant_cpu_to_le32(0xC0000084)
-#define STATUS_AGENTS_EXHAUSTED __constant_cpu_to_le32(0xC0000085)
-#define STATUS_INVALID_VOLUME_LABEL __constant_cpu_to_le32(0xC0000086)
-#define STATUS_SECTION_NOT_EXTENDED __constant_cpu_to_le32(0xC0000087)
-#define STATUS_NOT_MAPPED_DATA __constant_cpu_to_le32(0xC0000088)
-#define STATUS_RESOURCE_DATA_NOT_FOUND __constant_cpu_to_le32(0xC0000089)
-#define STATUS_RESOURCE_TYPE_NOT_FOUND __constant_cpu_to_le32(0xC000008A)
-#define STATUS_RESOURCE_NAME_NOT_FOUND __constant_cpu_to_le32(0xC000008B)
-#define STATUS_ARRAY_BOUNDS_EXCEEDED __constant_cpu_to_le32(0xC000008C)
-#define STATUS_FLOAT_DENORMAL_OPERAND __constant_cpu_to_le32(0xC000008D)
-#define STATUS_FLOAT_DIVIDE_BY_ZERO __constant_cpu_to_le32(0xC000008E)
-#define STATUS_FLOAT_INEXACT_RESULT __constant_cpu_to_le32(0xC000008F)
-#define STATUS_FLOAT_INVALID_OPERATION __constant_cpu_to_le32(0xC0000090)
-#define STATUS_FLOAT_OVERFLOW __constant_cpu_to_le32(0xC0000091)
-#define STATUS_FLOAT_STACK_CHECK __constant_cpu_to_le32(0xC0000092)
-#define STATUS_FLOAT_UNDERFLOW __constant_cpu_to_le32(0xC0000093)
-#define STATUS_INTEGER_DIVIDE_BY_ZERO __constant_cpu_to_le32(0xC0000094)
-#define STATUS_INTEGER_OVERFLOW __constant_cpu_to_le32(0xC0000095)
-#define STATUS_PRIVILEGED_INSTRUCTION __constant_cpu_to_le32(0xC0000096)
-#define STATUS_TOO_MANY_PAGING_FILES __constant_cpu_to_le32(0xC0000097)
-#define STATUS_FILE_INVALID __constant_cpu_to_le32(0xC0000098)
-#define STATUS_ALLOTTED_SPACE_EXCEEDED __constant_cpu_to_le32(0xC0000099)
-#define STATUS_INSUFFICIENT_RESOURCES __constant_cpu_to_le32(0xC000009A)
-#define STATUS_DFS_EXIT_PATH_FOUND __constant_cpu_to_le32(0xC000009B)
-#define STATUS_DEVICE_DATA_ERROR __constant_cpu_to_le32(0xC000009C)
-#define STATUS_DEVICE_NOT_CONNECTED __constant_cpu_to_le32(0xC000009D)
-#define STATUS_DEVICE_POWER_FAILURE __constant_cpu_to_le32(0xC000009E)
-#define STATUS_FREE_VM_NOT_AT_BASE __constant_cpu_to_le32(0xC000009F)
-#define STATUS_MEMORY_NOT_ALLOCATED __constant_cpu_to_le32(0xC00000A0)
-#define STATUS_WORKING_SET_QUOTA __constant_cpu_to_le32(0xC00000A1)
-#define STATUS_MEDIA_WRITE_PROTECTED __constant_cpu_to_le32(0xC00000A2)
-#define STATUS_DEVICE_NOT_READY __constant_cpu_to_le32(0xC00000A3)
-#define STATUS_INVALID_GROUP_ATTRIBUTES __constant_cpu_to_le32(0xC00000A4)
-#define STATUS_BAD_IMPERSONATION_LEVEL __constant_cpu_to_le32(0xC00000A5)
-#define STATUS_CANT_OPEN_ANONYMOUS __constant_cpu_to_le32(0xC00000A6)
-#define STATUS_BAD_VALIDATION_CLASS __constant_cpu_to_le32(0xC00000A7)
-#define STATUS_BAD_TOKEN_TYPE __constant_cpu_to_le32(0xC00000A8)
-#define STATUS_BAD_MASTER_BOOT_RECORD __constant_cpu_to_le32(0xC00000A9)
-#define STATUS_INSTRUCTION_MISALIGNMENT __constant_cpu_to_le32(0xC00000AA)
-#define STATUS_INSTANCE_NOT_AVAILABLE __constant_cpu_to_le32(0xC00000AB)
-#define STATUS_PIPE_NOT_AVAILABLE __constant_cpu_to_le32(0xC00000AC)
-#define STATUS_INVALID_PIPE_STATE __constant_cpu_to_le32(0xC00000AD)
-#define STATUS_PIPE_BUSY __constant_cpu_to_le32(0xC00000AE)
-#define STATUS_ILLEGAL_FUNCTION __constant_cpu_to_le32(0xC00000AF)
-#define STATUS_PIPE_DISCONNECTED __constant_cpu_to_le32(0xC00000B0)
-#define STATUS_PIPE_CLOSING __constant_cpu_to_le32(0xC00000B1)
-#define STATUS_PIPE_CONNECTED __constant_cpu_to_le32(0xC00000B2)
-#define STATUS_PIPE_LISTENING __constant_cpu_to_le32(0xC00000B3)
-#define STATUS_INVALID_READ_MODE __constant_cpu_to_le32(0xC00000B4)
-#define STATUS_IO_TIMEOUT __constant_cpu_to_le32(0xC00000B5)
-#define STATUS_FILE_FORCED_CLOSED __constant_cpu_to_le32(0xC00000B6)
-#define STATUS_PROFILING_NOT_STARTED __constant_cpu_to_le32(0xC00000B7)
-#define STATUS_PROFILING_NOT_STOPPED __constant_cpu_to_le32(0xC00000B8)
-#define STATUS_COULD_NOT_INTERPRET __constant_cpu_to_le32(0xC00000B9)
-#define STATUS_FILE_IS_A_DIRECTORY __constant_cpu_to_le32(0xC00000BA)
-#define STATUS_NOT_SUPPORTED __constant_cpu_to_le32(0xC00000BB)
-#define STATUS_REMOTE_NOT_LISTENING __constant_cpu_to_le32(0xC00000BC)
-#define STATUS_DUPLICATE_NAME __constant_cpu_to_le32(0xC00000BD)
-#define STATUS_BAD_NETWORK_PATH __constant_cpu_to_le32(0xC00000BE)
-#define STATUS_NETWORK_BUSY __constant_cpu_to_le32(0xC00000BF)
-#define STATUS_DEVICE_DOES_NOT_EXIST __constant_cpu_to_le32(0xC00000C0)
-#define STATUS_TOO_MANY_COMMANDS __constant_cpu_to_le32(0xC00000C1)
-#define STATUS_ADAPTER_HARDWARE_ERROR __constant_cpu_to_le32(0xC00000C2)
-#define STATUS_INVALID_NETWORK_RESPONSE __constant_cpu_to_le32(0xC00000C3)
-#define STATUS_UNEXPECTED_NETWORK_ERROR __constant_cpu_to_le32(0xC00000C4)
-#define STATUS_BAD_REMOTE_ADAPTER __constant_cpu_to_le32(0xC00000C5)
-#define STATUS_PRINT_QUEUE_FULL __constant_cpu_to_le32(0xC00000C6)
-#define STATUS_NO_SPOOL_SPACE __constant_cpu_to_le32(0xC00000C7)
-#define STATUS_PRINT_CANCELLED __constant_cpu_to_le32(0xC00000C8)
-#define STATUS_NETWORK_NAME_DELETED __constant_cpu_to_le32(0xC00000C9)
-#define STATUS_NETWORK_ACCESS_DENIED __constant_cpu_to_le32(0xC00000CA)
-#define STATUS_BAD_DEVICE_TYPE __constant_cpu_to_le32(0xC00000CB)
-#define STATUS_BAD_NETWORK_NAME __constant_cpu_to_le32(0xC00000CC)
-#define STATUS_TOO_MANY_NAMES __constant_cpu_to_le32(0xC00000CD)
-#define STATUS_TOO_MANY_SESSIONS __constant_cpu_to_le32(0xC00000CE)
-#define STATUS_SHARING_PAUSED __constant_cpu_to_le32(0xC00000CF)
-#define STATUS_REQUEST_NOT_ACCEPTED __constant_cpu_to_le32(0xC00000D0)
-#define STATUS_REDIRECTOR_PAUSED __constant_cpu_to_le32(0xC00000D1)
-#define STATUS_NET_WRITE_FAULT __constant_cpu_to_le32(0xC00000D2)
-#define STATUS_PROFILING_AT_LIMIT __constant_cpu_to_le32(0xC00000D3)
-#define STATUS_NOT_SAME_DEVICE __constant_cpu_to_le32(0xC00000D4)
-#define STATUS_FILE_RENAMED __constant_cpu_to_le32(0xC00000D5)
-#define STATUS_VIRTUAL_CIRCUIT_CLOSED __constant_cpu_to_le32(0xC00000D6)
-#define STATUS_NO_SECURITY_ON_OBJECT __constant_cpu_to_le32(0xC00000D7)
-#define STATUS_CANT_WAIT __constant_cpu_to_le32(0xC00000D8)
-#define STATUS_PIPE_EMPTY __constant_cpu_to_le32(0xC00000D9)
-#define STATUS_CANT_ACCESS_DOMAIN_INFO __constant_cpu_to_le32(0xC00000DA)
-#define STATUS_CANT_TERMINATE_SELF __constant_cpu_to_le32(0xC00000DB)
-#define STATUS_INVALID_SERVER_STATE __constant_cpu_to_le32(0xC00000DC)
-#define STATUS_INVALID_DOMAIN_STATE __constant_cpu_to_le32(0xC00000DD)
-#define STATUS_INVALID_DOMAIN_ROLE __constant_cpu_to_le32(0xC00000DE)
-#define STATUS_NO_SUCH_DOMAIN __constant_cpu_to_le32(0xC00000DF)
-#define STATUS_DOMAIN_EXISTS __constant_cpu_to_le32(0xC00000E0)
-#define STATUS_DOMAIN_LIMIT_EXCEEDED __constant_cpu_to_le32(0xC00000E1)
-#define STATUS_OPLOCK_NOT_GRANTED __constant_cpu_to_le32(0xC00000E2)
-#define STATUS_INVALID_OPLOCK_PROTOCOL __constant_cpu_to_le32(0xC00000E3)
-#define STATUS_INTERNAL_DB_CORRUPTION __constant_cpu_to_le32(0xC00000E4)
-#define STATUS_INTERNAL_ERROR __constant_cpu_to_le32(0xC00000E5)
-#define STATUS_GENERIC_NOT_MAPPED __constant_cpu_to_le32(0xC00000E6)
-#define STATUS_BAD_DESCRIPTOR_FORMAT __constant_cpu_to_le32(0xC00000E7)
-#define STATUS_INVALID_USER_BUFFER __constant_cpu_to_le32(0xC00000E8)
-#define STATUS_UNEXPECTED_IO_ERROR __constant_cpu_to_le32(0xC00000E9)
-#define STATUS_UNEXPECTED_MM_CREATE_ERR __constant_cpu_to_le32(0xC00000EA)
-#define STATUS_UNEXPECTED_MM_MAP_ERROR __constant_cpu_to_le32(0xC00000EB)
-#define STATUS_UNEXPECTED_MM_EXTEND_ERR __constant_cpu_to_le32(0xC00000EC)
-#define STATUS_NOT_LOGON_PROCESS __constant_cpu_to_le32(0xC00000ED)
-#define STATUS_LOGON_SESSION_EXISTS __constant_cpu_to_le32(0xC00000EE)
-#define STATUS_INVALID_PARAMETER_1 __constant_cpu_to_le32(0xC00000EF)
-#define STATUS_INVALID_PARAMETER_2 __constant_cpu_to_le32(0xC00000F0)
-#define STATUS_INVALID_PARAMETER_3 __constant_cpu_to_le32(0xC00000F1)
-#define STATUS_INVALID_PARAMETER_4 __constant_cpu_to_le32(0xC00000F2)
-#define STATUS_INVALID_PARAMETER_5 __constant_cpu_to_le32(0xC00000F3)
-#define STATUS_INVALID_PARAMETER_6 __constant_cpu_to_le32(0xC00000F4)
-#define STATUS_INVALID_PARAMETER_7 __constant_cpu_to_le32(0xC00000F5)
-#define STATUS_INVALID_PARAMETER_8 __constant_cpu_to_le32(0xC00000F6)
-#define STATUS_INVALID_PARAMETER_9 __constant_cpu_to_le32(0xC00000F7)
-#define STATUS_INVALID_PARAMETER_10 __constant_cpu_to_le32(0xC00000F8)
-#define STATUS_INVALID_PARAMETER_11 __constant_cpu_to_le32(0xC00000F9)
-#define STATUS_INVALID_PARAMETER_12 __constant_cpu_to_le32(0xC00000FA)
-#define STATUS_REDIRECTOR_NOT_STARTED __constant_cpu_to_le32(0xC00000FB)
-#define STATUS_REDIRECTOR_STARTED __constant_cpu_to_le32(0xC00000FC)
-#define STATUS_STACK_OVERFLOW __constant_cpu_to_le32(0xC00000FD)
-#define STATUS_NO_SUCH_PACKAGE __constant_cpu_to_le32(0xC00000FE)
-#define STATUS_BAD_FUNCTION_TABLE __constant_cpu_to_le32(0xC00000FF)
-#define STATUS_VARIABLE_NOT_FOUND __constant_cpu_to_le32(0xC0000100)
-#define STATUS_DIRECTORY_NOT_EMPTY __constant_cpu_to_le32(0xC0000101)
-#define STATUS_FILE_CORRUPT_ERROR __constant_cpu_to_le32(0xC0000102)
-#define STATUS_NOT_A_DIRECTORY __constant_cpu_to_le32(0xC0000103)
-#define STATUS_BAD_LOGON_SESSION_STATE __constant_cpu_to_le32(0xC0000104)
-#define STATUS_LOGON_SESSION_COLLISION __constant_cpu_to_le32(0xC0000105)
-#define STATUS_NAME_TOO_LONG __constant_cpu_to_le32(0xC0000106)
-#define STATUS_FILES_OPEN __constant_cpu_to_le32(0xC0000107)
-#define STATUS_CONNECTION_IN_USE __constant_cpu_to_le32(0xC0000108)
-#define STATUS_MESSAGE_NOT_FOUND __constant_cpu_to_le32(0xC0000109)
-#define STATUS_PROCESS_IS_TERMINATING __constant_cpu_to_le32(0xC000010A)
-#define STATUS_INVALID_LOGON_TYPE __constant_cpu_to_le32(0xC000010B)
-#define STATUS_NO_GUID_TRANSLATION __constant_cpu_to_le32(0xC000010C)
-#define STATUS_CANNOT_IMPERSONATE __constant_cpu_to_le32(0xC000010D)
-#define STATUS_IMAGE_ALREADY_LOADED __constant_cpu_to_le32(0xC000010E)
-#define STATUS_ABIOS_NOT_PRESENT __constant_cpu_to_le32(0xC000010F)
-#define STATUS_ABIOS_LID_NOT_EXIST __constant_cpu_to_le32(0xC0000110)
-#define STATUS_ABIOS_LID_ALREADY_OWNED __constant_cpu_to_le32(0xC0000111)
-#define STATUS_ABIOS_NOT_LID_OWNER __constant_cpu_to_le32(0xC0000112)
-#define STATUS_ABIOS_INVALID_COMMAND __constant_cpu_to_le32(0xC0000113)
-#define STATUS_ABIOS_INVALID_LID __constant_cpu_to_le32(0xC0000114)
-#define STATUS_ABIOS_SELECTOR_NOT_AVAILABLE __constant_cpu_to_le32(0xC0000115)
-#define STATUS_ABIOS_INVALID_SELECTOR __constant_cpu_to_le32(0xC0000116)
-#define STATUS_NO_LDT __constant_cpu_to_le32(0xC0000117)
-#define STATUS_INVALID_LDT_SIZE __constant_cpu_to_le32(0xC0000118)
-#define STATUS_INVALID_LDT_OFFSET __constant_cpu_to_le32(0xC0000119)
-#define STATUS_INVALID_LDT_DESCRIPTOR __constant_cpu_to_le32(0xC000011A)
-#define STATUS_INVALID_IMAGE_NE_FORMAT __constant_cpu_to_le32(0xC000011B)
-#define STATUS_RXACT_INVALID_STATE __constant_cpu_to_le32(0xC000011C)
-#define STATUS_RXACT_COMMIT_FAILURE __constant_cpu_to_le32(0xC000011D)
-#define STATUS_MAPPED_FILE_SIZE_ZERO __constant_cpu_to_le32(0xC000011E)
-#define STATUS_TOO_MANY_OPENED_FILES __constant_cpu_to_le32(0xC000011F)
-#define STATUS_CANCELLED __constant_cpu_to_le32(0xC0000120)
-#define STATUS_CANNOT_DELETE __constant_cpu_to_le32(0xC0000121)
-#define STATUS_INVALID_COMPUTER_NAME __constant_cpu_to_le32(0xC0000122)
-#define STATUS_FILE_DELETED __constant_cpu_to_le32(0xC0000123)
-#define STATUS_SPECIAL_ACCOUNT __constant_cpu_to_le32(0xC0000124)
-#define STATUS_SPECIAL_GROUP __constant_cpu_to_le32(0xC0000125)
-#define STATUS_SPECIAL_USER __constant_cpu_to_le32(0xC0000126)
-#define STATUS_MEMBERS_PRIMARY_GROUP __constant_cpu_to_le32(0xC0000127)
-#define STATUS_FILE_CLOSED __constant_cpu_to_le32(0xC0000128)
-#define STATUS_TOO_MANY_THREADS __constant_cpu_to_le32(0xC0000129)
-#define STATUS_THREAD_NOT_IN_PROCESS __constant_cpu_to_le32(0xC000012A)
-#define STATUS_TOKEN_ALREADY_IN_USE __constant_cpu_to_le32(0xC000012B)
-#define STATUS_PAGEFILE_QUOTA_EXCEEDED __constant_cpu_to_le32(0xC000012C)
-#define STATUS_COMMITMENT_LIMIT __constant_cpu_to_le32(0xC000012D)
-#define STATUS_INVALID_IMAGE_LE_FORMAT __constant_cpu_to_le32(0xC000012E)
-#define STATUS_INVALID_IMAGE_NOT_MZ __constant_cpu_to_le32(0xC000012F)
-#define STATUS_INVALID_IMAGE_PROTECT __constant_cpu_to_le32(0xC0000130)
-#define STATUS_INVALID_IMAGE_WIN_16 __constant_cpu_to_le32(0xC0000131)
-#define STATUS_LOGON_SERVER_CONFLICT __constant_cpu_to_le32(0xC0000132)
-#define STATUS_TIME_DIFFERENCE_AT_DC __constant_cpu_to_le32(0xC0000133)
-#define STATUS_SYNCHRONIZATION_REQUIRED __constant_cpu_to_le32(0xC0000134)
-#define STATUS_DLL_NOT_FOUND __constant_cpu_to_le32(0xC0000135)
-#define STATUS_OPEN_FAILED __constant_cpu_to_le32(0xC0000136)
-#define STATUS_IO_PRIVILEGE_FAILED __constant_cpu_to_le32(0xC0000137)
-#define STATUS_ORDINAL_NOT_FOUND __constant_cpu_to_le32(0xC0000138)
-#define STATUS_ENTRYPOINT_NOT_FOUND __constant_cpu_to_le32(0xC0000139)
-#define STATUS_CONTROL_C_EXIT __constant_cpu_to_le32(0xC000013A)
-#define STATUS_LOCAL_DISCONNECT __constant_cpu_to_le32(0xC000013B)
-#define STATUS_REMOTE_DISCONNECT __constant_cpu_to_le32(0xC000013C)
-#define STATUS_REMOTE_RESOURCES __constant_cpu_to_le32(0xC000013D)
-#define STATUS_LINK_FAILED __constant_cpu_to_le32(0xC000013E)
-#define STATUS_LINK_TIMEOUT __constant_cpu_to_le32(0xC000013F)
-#define STATUS_INVALID_CONNECTION __constant_cpu_to_le32(0xC0000140)
-#define STATUS_INVALID_ADDRESS __constant_cpu_to_le32(0xC0000141)
-#define STATUS_DLL_INIT_FAILED __constant_cpu_to_le32(0xC0000142)
-#define STATUS_MISSING_SYSTEMFILE __constant_cpu_to_le32(0xC0000143)
-#define STATUS_UNHANDLED_EXCEPTION __constant_cpu_to_le32(0xC0000144)
-#define STATUS_APP_INIT_FAILURE __constant_cpu_to_le32(0xC0000145)
-#define STATUS_PAGEFILE_CREATE_FAILED __constant_cpu_to_le32(0xC0000146)
-#define STATUS_NO_PAGEFILE __constant_cpu_to_le32(0xC0000147)
-#define STATUS_INVALID_LEVEL __constant_cpu_to_le32(0xC0000148)
-#define STATUS_WRONG_PASSWORD_CORE __constant_cpu_to_le32(0xC0000149)
-#define STATUS_ILLEGAL_FLOAT_CONTEXT __constant_cpu_to_le32(0xC000014A)
-#define STATUS_PIPE_BROKEN __constant_cpu_to_le32(0xC000014B)
-#define STATUS_REGISTRY_CORRUPT __constant_cpu_to_le32(0xC000014C)
-#define STATUS_REGISTRY_IO_FAILED __constant_cpu_to_le32(0xC000014D)
-#define STATUS_NO_EVENT_PAIR __constant_cpu_to_le32(0xC000014E)
-#define STATUS_UNRECOGNIZED_VOLUME __constant_cpu_to_le32(0xC000014F)
-#define STATUS_SERIAL_NO_DEVICE_INITED __constant_cpu_to_le32(0xC0000150)
-#define STATUS_NO_SUCH_ALIAS __constant_cpu_to_le32(0xC0000151)
-#define STATUS_MEMBER_NOT_IN_ALIAS __constant_cpu_to_le32(0xC0000152)
-#define STATUS_MEMBER_IN_ALIAS __constant_cpu_to_le32(0xC0000153)
-#define STATUS_ALIAS_EXISTS __constant_cpu_to_le32(0xC0000154)
-#define STATUS_LOGON_NOT_GRANTED __constant_cpu_to_le32(0xC0000155)
-#define STATUS_TOO_MANY_SECRETS __constant_cpu_to_le32(0xC0000156)
-#define STATUS_SECRET_TOO_LONG __constant_cpu_to_le32(0xC0000157)
-#define STATUS_INTERNAL_DB_ERROR __constant_cpu_to_le32(0xC0000158)
-#define STATUS_FULLSCREEN_MODE __constant_cpu_to_le32(0xC0000159)
-#define STATUS_TOO_MANY_CONTEXT_IDS __constant_cpu_to_le32(0xC000015A)
-#define STATUS_LOGON_TYPE_NOT_GRANTED __constant_cpu_to_le32(0xC000015B)
-#define STATUS_NOT_REGISTRY_FILE __constant_cpu_to_le32(0xC000015C)
-#define STATUS_NT_CROSS_ENCRYPTION_REQUIRED __constant_cpu_to_le32(0xC000015D)
-#define STATUS_DOMAIN_CTRLR_CONFIG_ERROR __constant_cpu_to_le32(0xC000015E)
-#define STATUS_FT_MISSING_MEMBER __constant_cpu_to_le32(0xC000015F)
-#define STATUS_ILL_FORMED_SERVICE_ENTRY __constant_cpu_to_le32(0xC0000160)
-#define STATUS_ILLEGAL_CHARACTER __constant_cpu_to_le32(0xC0000161)
-#define STATUS_UNMAPPABLE_CHARACTER __constant_cpu_to_le32(0xC0000162)
-#define STATUS_UNDEFINED_CHARACTER __constant_cpu_to_le32(0xC0000163)
-#define STATUS_FLOPPY_VOLUME __constant_cpu_to_le32(0xC0000164)
-#define STATUS_FLOPPY_ID_MARK_NOT_FOUND __constant_cpu_to_le32(0xC0000165)
-#define STATUS_FLOPPY_WRONG_CYLINDER __constant_cpu_to_le32(0xC0000166)
-#define STATUS_FLOPPY_UNKNOWN_ERROR __constant_cpu_to_le32(0xC0000167)
-#define STATUS_FLOPPY_BAD_REGISTERS __constant_cpu_to_le32(0xC0000168)
-#define STATUS_DISK_RECALIBRATE_FAILED __constant_cpu_to_le32(0xC0000169)
-#define STATUS_DISK_OPERATION_FAILED __constant_cpu_to_le32(0xC000016A)
-#define STATUS_DISK_RESET_FAILED __constant_cpu_to_le32(0xC000016B)
-#define STATUS_SHARED_IRQ_BUSY __constant_cpu_to_le32(0xC000016C)
-#define STATUS_FT_ORPHANING __constant_cpu_to_le32(0xC000016D)
-#define STATUS_BIOS_FAILED_TO_CONNECT_INTERRUPT __constant_cpu_to_le32(0xC000016E)
-#define STATUS_PARTITION_FAILURE __constant_cpu_to_le32(0xC0000172)
-#define STATUS_INVALID_BLOCK_LENGTH __constant_cpu_to_le32(0xC0000173)
-#define STATUS_DEVICE_NOT_PARTITIONED __constant_cpu_to_le32(0xC0000174)
-#define STATUS_UNABLE_TO_LOCK_MEDIA __constant_cpu_to_le32(0xC0000175)
-#define STATUS_UNABLE_TO_UNLOAD_MEDIA __constant_cpu_to_le32(0xC0000176)
-#define STATUS_EOM_OVERFLOW __constant_cpu_to_le32(0xC0000177)
-#define STATUS_NO_MEDIA __constant_cpu_to_le32(0xC0000178)
-#define STATUS_NO_SUCH_MEMBER __constant_cpu_to_le32(0xC000017A)
-#define STATUS_INVALID_MEMBER __constant_cpu_to_le32(0xC000017B)
-#define STATUS_KEY_DELETED __constant_cpu_to_le32(0xC000017C)
-#define STATUS_NO_LOG_SPACE __constant_cpu_to_le32(0xC000017D)
-#define STATUS_TOO_MANY_SIDS __constant_cpu_to_le32(0xC000017E)
-#define STATUS_LM_CROSS_ENCRYPTION_REQUIRED __constant_cpu_to_le32(0xC000017F)
-#define STATUS_KEY_HAS_CHILDREN __constant_cpu_to_le32(0xC0000180)
-#define STATUS_CHILD_MUST_BE_VOLATILE __constant_cpu_to_le32(0xC0000181)
-#define STATUS_DEVICE_CONFIGURATION_ERROR __constant_cpu_to_le32(0xC0000182)
-#define STATUS_DRIVER_INTERNAL_ERROR __constant_cpu_to_le32(0xC0000183)
-#define STATUS_INVALID_DEVICE_STATE __constant_cpu_to_le32(0xC0000184)
-#define STATUS_IO_DEVICE_ERROR __constant_cpu_to_le32(0xC0000185)
-#define STATUS_DEVICE_PROTOCOL_ERROR __constant_cpu_to_le32(0xC0000186)
-#define STATUS_BACKUP_CONTROLLER __constant_cpu_to_le32(0xC0000187)
-#define STATUS_LOG_FILE_FULL __constant_cpu_to_le32(0xC0000188)
-#define STATUS_TOO_LATE __constant_cpu_to_le32(0xC0000189)
-#define STATUS_NO_TRUST_LSA_SECRET __constant_cpu_to_le32(0xC000018A)
-#define STATUS_NO_TRUST_SAM_ACCOUNT __constant_cpu_to_le32(0xC000018B)
-#define STATUS_TRUSTED_DOMAIN_FAILURE __constant_cpu_to_le32(0xC000018C)
-#define STATUS_TRUSTED_RELATIONSHIP_FAILURE __constant_cpu_to_le32(0xC000018D)
-#define STATUS_EVENTLOG_FILE_CORRUPT __constant_cpu_to_le32(0xC000018E)
-#define STATUS_EVENTLOG_CANT_START __constant_cpu_to_le32(0xC000018F)
-#define STATUS_TRUST_FAILURE __constant_cpu_to_le32(0xC0000190)
-#define STATUS_MUTANT_LIMIT_EXCEEDED __constant_cpu_to_le32(0xC0000191)
-#define STATUS_NETLOGON_NOT_STARTED __constant_cpu_to_le32(0xC0000192)
-#define STATUS_ACCOUNT_EXPIRED __constant_cpu_to_le32(0xC0000193)
-#define STATUS_POSSIBLE_DEADLOCK __constant_cpu_to_le32(0xC0000194)
-#define STATUS_NETWORK_CREDENTIAL_CONFLICT __constant_cpu_to_le32(0xC0000195)
-#define STATUS_REMOTE_SESSION_LIMIT __constant_cpu_to_le32(0xC0000196)
-#define STATUS_EVENTLOG_FILE_CHANGED __constant_cpu_to_le32(0xC0000197)
-#define STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT __constant_cpu_to_le32(0xC0000198)
-#define STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT __constant_cpu_to_le32(0xC0000199)
-#define STATUS_NOLOGON_SERVER_TRUST_ACCOUNT __constant_cpu_to_le32(0xC000019A)
-#define STATUS_DOMAIN_TRUST_INCONSISTENT __constant_cpu_to_le32(0xC000019B)
-#define STATUS_FS_DRIVER_REQUIRED __constant_cpu_to_le32(0xC000019C)
-#define STATUS_IMAGE_ALREADY_LOADED_AS_DLL __constant_cpu_to_le32(0xC000019D)
-#define STATUS_NETWORK_OPEN_RESTRICTION __constant_cpu_to_le32(0xC0000201)
-#define STATUS_NO_USER_SESSION_KEY __constant_cpu_to_le32(0xC0000202)
-#define STATUS_USER_SESSION_DELETED __constant_cpu_to_le32(0xC0000203)
-#define STATUS_RESOURCE_LANG_NOT_FOUND __constant_cpu_to_le32(0xC0000204)
-#define STATUS_INSUFF_SERVER_RESOURCES __constant_cpu_to_le32(0xC0000205)
-#define STATUS_INVALID_BUFFER_SIZE __constant_cpu_to_le32(0xC0000206)
-#define STATUS_INVALID_ADDRESS_COMPONENT __constant_cpu_to_le32(0xC0000207)
-#define STATUS_INVALID_ADDRESS_WILDCARD __constant_cpu_to_le32(0xC0000208)
-#define STATUS_TOO_MANY_ADDRESSES __constant_cpu_to_le32(0xC0000209)
-#define STATUS_ADDRESS_ALREADY_EXISTS __constant_cpu_to_le32(0xC000020A)
-#define STATUS_ADDRESS_CLOSED __constant_cpu_to_le32(0xC000020B)
-#define STATUS_CONNECTION_DISCONNECTED __constant_cpu_to_le32(0xC000020C)
-#define STATUS_CONNECTION_RESET __constant_cpu_to_le32(0xC000020D)
-#define STATUS_TOO_MANY_NODES __constant_cpu_to_le32(0xC000020E)
-#define STATUS_TRANSACTION_ABORTED __constant_cpu_to_le32(0xC000020F)
-#define STATUS_TRANSACTION_TIMED_OUT __constant_cpu_to_le32(0xC0000210)
-#define STATUS_TRANSACTION_NO_RELEASE __constant_cpu_to_le32(0xC0000211)
-#define STATUS_TRANSACTION_NO_MATCH __constant_cpu_to_le32(0xC0000212)
-#define STATUS_TRANSACTION_RESPONDED __constant_cpu_to_le32(0xC0000213)
-#define STATUS_TRANSACTION_INVALID_ID __constant_cpu_to_le32(0xC0000214)
-#define STATUS_TRANSACTION_INVALID_TYPE __constant_cpu_to_le32(0xC0000215)
-#define STATUS_NOT_SERVER_SESSION __constant_cpu_to_le32(0xC0000216)
-#define STATUS_NOT_CLIENT_SESSION __constant_cpu_to_le32(0xC0000217)
-#define STATUS_CANNOT_LOAD_REGISTRY_FILE __constant_cpu_to_le32(0xC0000218)
-#define STATUS_DEBUG_ATTACH_FAILED __constant_cpu_to_le32(0xC0000219)
-#define STATUS_SYSTEM_PROCESS_TERMINATED __constant_cpu_to_le32(0xC000021A)
-#define STATUS_DATA_NOT_ACCEPTED __constant_cpu_to_le32(0xC000021B)
-#define STATUS_NO_BROWSER_SERVERS_FOUND __constant_cpu_to_le32(0xC000021C)
-#define STATUS_VDM_HARD_ERROR __constant_cpu_to_le32(0xC000021D)
-#define STATUS_DRIVER_CANCEL_TIMEOUT __constant_cpu_to_le32(0xC000021E)
-#define STATUS_REPLY_MESSAGE_MISMATCH __constant_cpu_to_le32(0xC000021F)
-#define STATUS_MAPPED_ALIGNMENT __constant_cpu_to_le32(0xC0000220)
-#define STATUS_IMAGE_CHECKSUM_MISMATCH __constant_cpu_to_le32(0xC0000221)
-#define STATUS_LOST_WRITEBEHIND_DATA __constant_cpu_to_le32(0xC0000222)
-#define STATUS_CLIENT_SERVER_PARAMETERS_INVALID __constant_cpu_to_le32(0xC0000223)
-#define STATUS_PASSWORD_MUST_CHANGE __constant_cpu_to_le32(0xC0000224)
-#define STATUS_NOT_FOUND __constant_cpu_to_le32(0xC0000225)
-#define STATUS_NOT_TINY_STREAM __constant_cpu_to_le32(0xC0000226)
-#define STATUS_RECOVERY_FAILURE __constant_cpu_to_le32(0xC0000227)
-#define STATUS_STACK_OVERFLOW_READ __constant_cpu_to_le32(0xC0000228)
-#define STATUS_FAIL_CHECK __constant_cpu_to_le32(0xC0000229)
-#define STATUS_DUPLICATE_OBJECTID __constant_cpu_to_le32(0xC000022A)
-#define STATUS_OBJECTID_EXISTS __constant_cpu_to_le32(0xC000022B)
-#define STATUS_CONVERT_TO_LARGE __constant_cpu_to_le32(0xC000022C)
-#define STATUS_RETRY __constant_cpu_to_le32(0xC000022D)
-#define STATUS_FOUND_OUT_OF_SCOPE __constant_cpu_to_le32(0xC000022E)
-#define STATUS_ALLOCATE_BUCKET __constant_cpu_to_le32(0xC000022F)
-#define STATUS_PROPSET_NOT_FOUND __constant_cpu_to_le32(0xC0000230)
-#define STATUS_MARSHALL_OVERFLOW __constant_cpu_to_le32(0xC0000231)
-#define STATUS_INVALID_VARIANT __constant_cpu_to_le32(0xC0000232)
-#define STATUS_DOMAIN_CONTROLLER_NOT_FOUND __constant_cpu_to_le32(0xC0000233)
-#define STATUS_ACCOUNT_LOCKED_OUT __constant_cpu_to_le32(0xC0000234)
-#define STATUS_HANDLE_NOT_CLOSABLE __constant_cpu_to_le32(0xC0000235)
-#define STATUS_CONNECTION_REFUSED __constant_cpu_to_le32(0xC0000236)
-#define STATUS_GRACEFUL_DISCONNECT __constant_cpu_to_le32(0xC0000237)
-#define STATUS_ADDRESS_ALREADY_ASSOCIATED __constant_cpu_to_le32(0xC0000238)
-#define STATUS_ADDRESS_NOT_ASSOCIATED __constant_cpu_to_le32(0xC0000239)
-#define STATUS_CONNECTION_INVALID __constant_cpu_to_le32(0xC000023A)
-#define STATUS_CONNECTION_ACTIVE __constant_cpu_to_le32(0xC000023B)
-#define STATUS_NETWORK_UNREACHABLE __constant_cpu_to_le32(0xC000023C)
-#define STATUS_HOST_UNREACHABLE __constant_cpu_to_le32(0xC000023D)
-#define STATUS_PROTOCOL_UNREACHABLE __constant_cpu_to_le32(0xC000023E)
-#define STATUS_PORT_UNREACHABLE __constant_cpu_to_le32(0xC000023F)
-#define STATUS_REQUEST_ABORTED __constant_cpu_to_le32(0xC0000240)
-#define STATUS_CONNECTION_ABORTED __constant_cpu_to_le32(0xC0000241)
-#define STATUS_BAD_COMPRESSION_BUFFER __constant_cpu_to_le32(0xC0000242)
-#define STATUS_USER_MAPPED_FILE __constant_cpu_to_le32(0xC0000243)
-#define STATUS_AUDIT_FAILED __constant_cpu_to_le32(0xC0000244)
-#define STATUS_TIMER_RESOLUTION_NOT_SET __constant_cpu_to_le32(0xC0000245)
-#define STATUS_CONNECTION_COUNT_LIMIT __constant_cpu_to_le32(0xC0000246)
-#define STATUS_LOGIN_TIME_RESTRICTION __constant_cpu_to_le32(0xC0000247)
-#define STATUS_LOGIN_WKSTA_RESTRICTION __constant_cpu_to_le32(0xC0000248)
-#define STATUS_IMAGE_MP_UP_MISMATCH __constant_cpu_to_le32(0xC0000249)
-#define STATUS_INSUFFICIENT_LOGON_INFO __constant_cpu_to_le32(0xC0000250)
-#define STATUS_BAD_DLL_ENTRYPOINT __constant_cpu_to_le32(0xC0000251)
-#define STATUS_BAD_SERVICE_ENTRYPOINT __constant_cpu_to_le32(0xC0000252)
-#define STATUS_LPC_REPLY_LOST __constant_cpu_to_le32(0xC0000253)
-#define STATUS_IP_ADDRESS_CONFLICT1 __constant_cpu_to_le32(0xC0000254)
-#define STATUS_IP_ADDRESS_CONFLICT2 __constant_cpu_to_le32(0xC0000255)
-#define STATUS_REGISTRY_QUOTA_LIMIT __constant_cpu_to_le32(0xC0000256)
-#define STATUS_PATH_NOT_COVERED __constant_cpu_to_le32(0xC0000257)
-#define STATUS_NO_CALLBACK_ACTIVE __constant_cpu_to_le32(0xC0000258)
-#define STATUS_LICENSE_QUOTA_EXCEEDED __constant_cpu_to_le32(0xC0000259)
-#define STATUS_PWD_TOO_SHORT __constant_cpu_to_le32(0xC000025A)
-#define STATUS_PWD_TOO_RECENT __constant_cpu_to_le32(0xC000025B)
-#define STATUS_PWD_HISTORY_CONFLICT __constant_cpu_to_le32(0xC000025C)
-#define STATUS_PLUGPLAY_NO_DEVICE __constant_cpu_to_le32(0xC000025E)
-#define STATUS_UNSUPPORTED_COMPRESSION __constant_cpu_to_le32(0xC000025F)
-#define STATUS_INVALID_HW_PROFILE __constant_cpu_to_le32(0xC0000260)
-#define STATUS_INVALID_PLUGPLAY_DEVICE_PATH __constant_cpu_to_le32(0xC0000261)
-#define STATUS_DRIVER_ORDINAL_NOT_FOUND __constant_cpu_to_le32(0xC0000262)
-#define STATUS_DRIVER_ENTRYPOINT_NOT_FOUND __constant_cpu_to_le32(0xC0000263)
-#define STATUS_RESOURCE_NOT_OWNED __constant_cpu_to_le32(0xC0000264)
-#define STATUS_TOO_MANY_LINKS __constant_cpu_to_le32(0xC0000265)
-#define STATUS_QUOTA_LIST_INCONSISTENT __constant_cpu_to_le32(0xC0000266)
-#define STATUS_FILE_IS_OFFLINE __constant_cpu_to_le32(0xC0000267)
-#define STATUS_EVALUATION_EXPIRATION __constant_cpu_to_le32(0xC0000268)
-#define STATUS_ILLEGAL_DLL_RELOCATION __constant_cpu_to_le32(0xC0000269)
-#define STATUS_LICENSE_VIOLATION __constant_cpu_to_le32(0xC000026A)
-#define STATUS_DLL_INIT_FAILED_LOGOFF __constant_cpu_to_le32(0xC000026B)
-#define STATUS_DRIVER_UNABLE_TO_LOAD __constant_cpu_to_le32(0xC000026C)
-#define STATUS_DFS_UNAVAILABLE __constant_cpu_to_le32(0xC000026D)
-#define STATUS_VOLUME_DISMOUNTED __constant_cpu_to_le32(0xC000026E)
-#define STATUS_WX86_INTERNAL_ERROR __constant_cpu_to_le32(0xC000026F)
-#define STATUS_WX86_FLOAT_STACK_CHECK __constant_cpu_to_le32(0xC0000270)
-#define STATUS_VALIDATE_CONTINUE __constant_cpu_to_le32(0xC0000271)
-#define STATUS_NO_MATCH __constant_cpu_to_le32(0xC0000272)
-#define STATUS_NO_MORE_MATCHES __constant_cpu_to_le32(0xC0000273)
-#define STATUS_NOT_A_REPARSE_POINT __constant_cpu_to_le32(0xC0000275)
-#define STATUS_IO_REPARSE_TAG_INVALID __constant_cpu_to_le32(0xC0000276)
-#define STATUS_IO_REPARSE_TAG_MISMATCH __constant_cpu_to_le32(0xC0000277)
-#define STATUS_IO_REPARSE_DATA_INVALID __constant_cpu_to_le32(0xC0000278)
-#define STATUS_IO_REPARSE_TAG_NOT_HANDLED __constant_cpu_to_le32(0xC0000279)
-#define STATUS_REPARSE_POINT_NOT_RESOLVED __constant_cpu_to_le32(0xC0000280)
-#define STATUS_DIRECTORY_IS_A_REPARSE_POINT __constant_cpu_to_le32(0xC0000281)
-#define STATUS_RANGE_LIST_CONFLICT __constant_cpu_to_le32(0xC0000282)
-#define STATUS_SOURCE_ELEMENT_EMPTY __constant_cpu_to_le32(0xC0000283)
-#define STATUS_DESTINATION_ELEMENT_FULL __constant_cpu_to_le32(0xC0000284)
-#define STATUS_ILLEGAL_ELEMENT_ADDRESS __constant_cpu_to_le32(0xC0000285)
-#define STATUS_MAGAZINE_NOT_PRESENT __constant_cpu_to_le32(0xC0000286)
-#define STATUS_REINITIALIZATION_NEEDED __constant_cpu_to_le32(0xC0000287)
-#define STATUS_ENCRYPTION_FAILED __constant_cpu_to_le32(0xC000028A)
-#define STATUS_DECRYPTION_FAILED __constant_cpu_to_le32(0xC000028B)
-#define STATUS_RANGE_NOT_FOUND __constant_cpu_to_le32(0xC000028C)
-#define STATUS_NO_RECOVERY_POLICY __constant_cpu_to_le32(0xC000028D)
-#define STATUS_NO_EFS __constant_cpu_to_le32(0xC000028E)
-#define STATUS_WRONG_EFS __constant_cpu_to_le32(0xC000028F)
-#define STATUS_NO_USER_KEYS __constant_cpu_to_le32(0xC0000290)
-#define STATUS_FILE_NOT_ENCRYPTED __constant_cpu_to_le32(0xC0000291)
-#define STATUS_NOT_EXPORT_FORMAT __constant_cpu_to_le32(0xC0000292)
-#define STATUS_FILE_ENCRYPTED __constant_cpu_to_le32(0xC0000293)
-#define STATUS_WMI_GUID_NOT_FOUND __constant_cpu_to_le32(0xC0000295)
-#define STATUS_WMI_INSTANCE_NOT_FOUND __constant_cpu_to_le32(0xC0000296)
-#define STATUS_WMI_ITEMID_NOT_FOUND __constant_cpu_to_le32(0xC0000297)
-#define STATUS_WMI_TRY_AGAIN __constant_cpu_to_le32(0xC0000298)
-#define STATUS_SHARED_POLICY __constant_cpu_to_le32(0xC0000299)
-#define STATUS_POLICY_OBJECT_NOT_FOUND __constant_cpu_to_le32(0xC000029A)
-#define STATUS_POLICY_ONLY_IN_DS __constant_cpu_to_le32(0xC000029B)
-#define STATUS_VOLUME_NOT_UPGRADED __constant_cpu_to_le32(0xC000029C)
-#define STATUS_REMOTE_STORAGE_NOT_ACTIVE __constant_cpu_to_le32(0xC000029D)
-#define STATUS_REMOTE_STORAGE_MEDIA_ERROR __constant_cpu_to_le32(0xC000029E)
-#define STATUS_NO_TRACKING_SERVICE __constant_cpu_to_le32(0xC000029F)
-#define STATUS_SERVER_SID_MISMATCH __constant_cpu_to_le32(0xC00002A0)
-#define STATUS_DS_NO_ATTRIBUTE_OR_VALUE __constant_cpu_to_le32(0xC00002A1)
-#define STATUS_DS_INVALID_ATTRIBUTE_SYNTAX __constant_cpu_to_le32(0xC00002A2)
-#define STATUS_DS_ATTRIBUTE_TYPE_UNDEFINED __constant_cpu_to_le32(0xC00002A3)
-#define STATUS_DS_ATTRIBUTE_OR_VALUE_EXISTS __constant_cpu_to_le32(0xC00002A4)
-#define STATUS_DS_BUSY __constant_cpu_to_le32(0xC00002A5)
-#define STATUS_DS_UNAVAILABLE __constant_cpu_to_le32(0xC00002A6)
-#define STATUS_DS_NO_RIDS_ALLOCATED __constant_cpu_to_le32(0xC00002A7)
-#define STATUS_DS_NO_MORE_RIDS __constant_cpu_to_le32(0xC00002A8)
-#define STATUS_DS_INCORRECT_ROLE_OWNER __constant_cpu_to_le32(0xC00002A9)
-#define STATUS_DS_RIDMGR_INIT_ERROR __constant_cpu_to_le32(0xC00002AA)
-#define STATUS_DS_OBJ_CLASS_VIOLATION __constant_cpu_to_le32(0xC00002AB)
-#define STATUS_DS_CANT_ON_NON_LEAF __constant_cpu_to_le32(0xC00002AC)
-#define STATUS_DS_CANT_ON_RDN __constant_cpu_to_le32(0xC00002AD)
-#define STATUS_DS_CANT_MOD_OBJ_CLASS __constant_cpu_to_le32(0xC00002AE)
-#define STATUS_DS_CROSS_DOM_MOVE_FAILED __constant_cpu_to_le32(0xC00002AF)
-#define STATUS_DS_GC_NOT_AVAILABLE __constant_cpu_to_le32(0xC00002B0)
-#define STATUS_DIRECTORY_SERVICE_REQUIRED __constant_cpu_to_le32(0xC00002B1)
-#define STATUS_REPARSE_ATTRIBUTE_CONFLICT __constant_cpu_to_le32(0xC00002B2)
-#define STATUS_CANT_ENABLE_DENY_ONLY __constant_cpu_to_le32(0xC00002B3)
-#define STATUS_FLOAT_MULTIPLE_FAULTS __constant_cpu_to_le32(0xC00002B4)
-#define STATUS_FLOAT_MULTIPLE_TRAPS __constant_cpu_to_le32(0xC00002B5)
-#define STATUS_DEVICE_REMOVED __constant_cpu_to_le32(0xC00002B6)
-#define STATUS_JOURNAL_DELETE_IN_PROGRESS __constant_cpu_to_le32(0xC00002B7)
-#define STATUS_JOURNAL_NOT_ACTIVE __constant_cpu_to_le32(0xC00002B8)
-#define STATUS_NOINTERFACE __constant_cpu_to_le32(0xC00002B9)
-#define STATUS_DS_ADMIN_LIMIT_EXCEEDED __constant_cpu_to_le32(0xC00002C1)
-#define STATUS_DRIVER_FAILED_SLEEP __constant_cpu_to_le32(0xC00002C2)
-#define STATUS_MUTUAL_AUTHENTICATION_FAILED __constant_cpu_to_le32(0xC00002C3)
-#define STATUS_CORRUPT_SYSTEM_FILE __constant_cpu_to_le32(0xC00002C4)
-#define STATUS_DATATYPE_MISALIGNMENT_ERROR __constant_cpu_to_le32(0xC00002C5)
-#define STATUS_WMI_READ_ONLY __constant_cpu_to_le32(0xC00002C6)
-#define STATUS_WMI_SET_FAILURE __constant_cpu_to_le32(0xC00002C7)
-#define STATUS_COMMITMENT_MINIMUM __constant_cpu_to_le32(0xC00002C8)
-#define STATUS_REG_NAT_CONSUMPTION __constant_cpu_to_le32(0xC00002C9)
-#define STATUS_TRANSPORT_FULL __constant_cpu_to_le32(0xC00002CA)
-#define STATUS_DS_SAM_INIT_FAILURE __constant_cpu_to_le32(0xC00002CB)
-#define STATUS_ONLY_IF_CONNECTED __constant_cpu_to_le32(0xC00002CC)
-#define STATUS_DS_SENSITIVE_GROUP_VIOLATION __constant_cpu_to_le32(0xC00002CD)
-#define STATUS_PNP_RESTART_ENUMERATION __constant_cpu_to_le32(0xC00002CE)
-#define STATUS_JOURNAL_ENTRY_DELETED __constant_cpu_to_le32(0xC00002CF)
-#define STATUS_DS_CANT_MOD_PRIMARYGROUPID __constant_cpu_to_le32(0xC00002D0)
-#define STATUS_SYSTEM_IMAGE_BAD_SIGNATURE __constant_cpu_to_le32(0xC00002D1)
-#define STATUS_PNP_REBOOT_REQUIRED __constant_cpu_to_le32(0xC00002D2)
-#define STATUS_POWER_STATE_INVALID __constant_cpu_to_le32(0xC00002D3)
-#define STATUS_DS_INVALID_GROUP_TYPE __constant_cpu_to_le32(0xC00002D4)
-#define STATUS_DS_NO_NEST_GLOBALGROUP_IN_MIXEDDOMAIN __constant_cpu_to_le32(0xC00002D5)
-#define STATUS_DS_NO_NEST_LOCALGROUP_IN_MIXEDDOMAIN __constant_cpu_to_le32(0xC00002D6)
-#define STATUS_DS_GLOBAL_CANT_HAVE_LOCAL_MEMBER __constant_cpu_to_le32(0xC00002D7)
-#define STATUS_DS_GLOBAL_CANT_HAVE_UNIVERSAL_MEMBER __constant_cpu_to_le32(0xC00002D8)
-#define STATUS_DS_UNIVERSAL_CANT_HAVE_LOCAL_MEMBER __constant_cpu_to_le32(0xC00002D9)
-#define STATUS_DS_GLOBAL_CANT_HAVE_CROSSDOMAIN_MEMBER __constant_cpu_to_le32(0xC00002DA)
-#define STATUS_DS_LOCAL_CANT_HAVE_CROSSDOMAIN_LOCAL_MEMBER __constant_cpu_to_le32(0xC00002DB)
-#define STATUS_DS_HAVE_PRIMARY_MEMBERS __constant_cpu_to_le32(0xC00002DC)
-#define STATUS_WMI_NOT_SUPPORTED __constant_cpu_to_le32(0xC00002DD)
-#define STATUS_INSUFFICIENT_POWER __constant_cpu_to_le32(0xC00002DE)
-#define STATUS_SAM_NEED_BOOTKEY_PASSWORD __constant_cpu_to_le32(0xC00002DF)
-#define STATUS_SAM_NEED_BOOTKEY_FLOPPY __constant_cpu_to_le32(0xC00002E0)
-#define STATUS_DS_CANT_START __constant_cpu_to_le32(0xC00002E1)
-#define STATUS_DS_INIT_FAILURE __constant_cpu_to_le32(0xC00002E2)
-#define STATUS_SAM_INIT_FAILURE __constant_cpu_to_le32(0xC00002E3)
-#define STATUS_DS_GC_REQUIRED __constant_cpu_to_le32(0xC00002E4)
-#define STATUS_DS_LOCAL_MEMBER_OF_LOCAL_ONLY __constant_cpu_to_le32(0xC00002E5)
-#define STATUS_DS_NO_FPO_IN_UNIVERSAL_GROUPS __constant_cpu_to_le32(0xC00002E6)
-#define STATUS_DS_MACHINE_ACCOUNT_QUOTA_EXCEEDED __constant_cpu_to_le32(0xC00002E7)
-#define STATUS_MULTIPLE_FAULT_VIOLATION __constant_cpu_to_le32(0xC00002E8)
-#define STATUS_CURRENT_DOMAIN_NOT_ALLOWED __constant_cpu_to_le32(0xC00002E9)
-#define STATUS_CANNOT_MAKE __constant_cpu_to_le32(0xC00002EA)
-#define STATUS_SYSTEM_SHUTDOWN __constant_cpu_to_le32(0xC00002EB)
-#define STATUS_DS_INIT_FAILURE_CONSOLE __constant_cpu_to_le32(0xC00002EC)
-#define STATUS_DS_SAM_INIT_FAILURE_CONSOLE __constant_cpu_to_le32(0xC00002ED)
-#define STATUS_UNFINISHED_CONTEXT_DELETED __constant_cpu_to_le32(0xC00002EE)
-#define STATUS_NO_TGT_REPLY __constant_cpu_to_le32(0xC00002EF)
-#define STATUS_OBJECTID_NOT_FOUND __constant_cpu_to_le32(0xC00002F0)
-#define STATUS_NO_IP_ADDRESSES __constant_cpu_to_le32(0xC00002F1)
-#define STATUS_WRONG_CREDENTIAL_HANDLE __constant_cpu_to_le32(0xC00002F2)
-#define STATUS_CRYPTO_SYSTEM_INVALID __constant_cpu_to_le32(0xC00002F3)
-#define STATUS_MAX_REFERRALS_EXCEEDED __constant_cpu_to_le32(0xC00002F4)
-#define STATUS_MUST_BE_KDC __constant_cpu_to_le32(0xC00002F5)
-#define STATUS_STRONG_CRYPTO_NOT_SUPPORTED __constant_cpu_to_le32(0xC00002F6)
-#define STATUS_TOO_MANY_PRINCIPALS __constant_cpu_to_le32(0xC00002F7)
-#define STATUS_NO_PA_DATA __constant_cpu_to_le32(0xC00002F8)
-#define STATUS_PKINIT_NAME_MISMATCH __constant_cpu_to_le32(0xC00002F9)
-#define STATUS_SMARTCARD_LOGON_REQUIRED __constant_cpu_to_le32(0xC00002FA)
-#define STATUS_KDC_INVALID_REQUEST __constant_cpu_to_le32(0xC00002FB)
-#define STATUS_KDC_UNABLE_TO_REFER __constant_cpu_to_le32(0xC00002FC)
-#define STATUS_KDC_UNKNOWN_ETYPE __constant_cpu_to_le32(0xC00002FD)
-#define STATUS_SHUTDOWN_IN_PROGRESS __constant_cpu_to_le32(0xC00002FE)
-#define STATUS_SERVER_SHUTDOWN_IN_PROGRESS __constant_cpu_to_le32(0xC00002FF)
-#define STATUS_NOT_SUPPORTED_ON_SBS __constant_cpu_to_le32(0xC0000300)
-#define STATUS_WMI_GUID_DISCONNECTED __constant_cpu_to_le32(0xC0000301)
-#define STATUS_WMI_ALREADY_DISABLED __constant_cpu_to_le32(0xC0000302)
-#define STATUS_WMI_ALREADY_ENABLED __constant_cpu_to_le32(0xC0000303)
-#define STATUS_MFT_TOO_FRAGMENTED __constant_cpu_to_le32(0xC0000304)
-#define STATUS_COPY_PROTECTION_FAILURE __constant_cpu_to_le32(0xC0000305)
-#define STATUS_CSS_AUTHENTICATION_FAILURE __constant_cpu_to_le32(0xC0000306)
-#define STATUS_CSS_KEY_NOT_PRESENT __constant_cpu_to_le32(0xC0000307)
-#define STATUS_CSS_KEY_NOT_ESTABLISHED __constant_cpu_to_le32(0xC0000308)
-#define STATUS_CSS_SCRAMBLED_SECTOR __constant_cpu_to_le32(0xC0000309)
-#define STATUS_CSS_REGION_MISMATCH __constant_cpu_to_le32(0xC000030A)
-#define STATUS_CSS_RESETS_EXHAUSTED __constant_cpu_to_le32(0xC000030B)
-#define STATUS_PKINIT_FAILURE __constant_cpu_to_le32(0xC0000320)
-#define STATUS_SMARTCARD_SUBSYSTEM_FAILURE __constant_cpu_to_le32(0xC0000321)
-#define STATUS_NO_KERB_KEY __constant_cpu_to_le32(0xC0000322)
-#define STATUS_HOST_DOWN __constant_cpu_to_le32(0xC0000350)
-#define STATUS_UNSUPPORTED_PREAUTH __constant_cpu_to_le32(0xC0000351)
-#define STATUS_EFS_ALG_BLOB_TOO_BIG __constant_cpu_to_le32(0xC0000352)
-#define STATUS_PORT_NOT_SET __constant_cpu_to_le32(0xC0000353)
-#define STATUS_DEBUGGER_INACTIVE __constant_cpu_to_le32(0xC0000354)
-#define STATUS_DS_VERSION_CHECK_FAILURE __constant_cpu_to_le32(0xC0000355)
-#define STATUS_AUDITING_DISABLED __constant_cpu_to_le32(0xC0000356)
-#define STATUS_PRENT4_MACHINE_ACCOUNT __constant_cpu_to_le32(0xC0000357)
-#define STATUS_DS_AG_CANT_HAVE_UNIVERSAL_MEMBER __constant_cpu_to_le32(0xC0000358)
-#define STATUS_INVALID_IMAGE_WIN_32 __constant_cpu_to_le32(0xC0000359)
-#define STATUS_INVALID_IMAGE_WIN_64 __constant_cpu_to_le32(0xC000035A)
-#define STATUS_BAD_BINDINGS __constant_cpu_to_le32(0xC000035B)
-#define STATUS_NETWORK_SESSION_EXPIRED __constant_cpu_to_le32(0xC000035C)
-#define STATUS_APPHELP_BLOCK __constant_cpu_to_le32(0xC000035D)
-#define STATUS_ALL_SIDS_FILTERED __constant_cpu_to_le32(0xC000035E)
-#define STATUS_NOT_SAFE_MODE_DRIVER __constant_cpu_to_le32(0xC000035F)
-#define STATUS_ACCESS_DISABLED_BY_POLICY_DEFAULT __constant_cpu_to_le32(0xC0000361)
-#define STATUS_ACCESS_DISABLED_BY_POLICY_PATH __constant_cpu_to_le32(0xC0000362)
-#define STATUS_ACCESS_DISABLED_BY_POLICY_PUBLISHER __constant_cpu_to_le32(0xC0000363)
-#define STATUS_ACCESS_DISABLED_BY_POLICY_OTHER __constant_cpu_to_le32(0xC0000364)
-#define STATUS_FAILED_DRIVER_ENTRY __constant_cpu_to_le32(0xC0000365)
-#define STATUS_DEVICE_ENUMERATION_ERROR __constant_cpu_to_le32(0xC0000366)
-#define STATUS_MOUNT_POINT_NOT_RESOLVED __constant_cpu_to_le32(0xC0000368)
-#define STATUS_INVALID_DEVICE_OBJECT_PARAMETER __constant_cpu_to_le32(0xC0000369)
-#define STATUS_MCA_OCCURED __constant_cpu_to_le32(0xC000036A)
-#define STATUS_DRIVER_BLOCKED_CRITICAL __constant_cpu_to_le32(0xC000036B)
-#define STATUS_DRIVER_BLOCKED __constant_cpu_to_le32(0xC000036C)
-#define STATUS_DRIVER_DATABASE_ERROR __constant_cpu_to_le32(0xC000036D)
-#define STATUS_SYSTEM_HIVE_TOO_LARGE __constant_cpu_to_le32(0xC000036E)
-#define STATUS_INVALID_IMPORT_OF_NON_DLL __constant_cpu_to_le32(0xC000036F)
-#define STATUS_NO_SECRETS __constant_cpu_to_le32(0xC0000371)
-#define STATUS_ACCESS_DISABLED_NO_SAFER_UI_BY_POLICY __constant_cpu_to_le32(0xC0000372)
-#define STATUS_FAILED_STACK_SWITCH __constant_cpu_to_le32(0xC0000373)
-#define STATUS_HEAP_CORRUPTION __constant_cpu_to_le32(0xC0000374)
-#define STATUS_SMARTCARD_WRONG_PIN __constant_cpu_to_le32(0xC0000380)
-#define STATUS_SMARTCARD_CARD_BLOCKED __constant_cpu_to_le32(0xC0000381)
-#define STATUS_SMARTCARD_CARD_NOT_AUTHENTICATED __constant_cpu_to_le32(0xC0000382)
-#define STATUS_SMARTCARD_NO_CARD __constant_cpu_to_le32(0xC0000383)
-#define STATUS_SMARTCARD_NO_KEY_CONTAINER __constant_cpu_to_le32(0xC0000384)
-#define STATUS_SMARTCARD_NO_CERTIFICATE __constant_cpu_to_le32(0xC0000385)
-#define STATUS_SMARTCARD_NO_KEYSET __constant_cpu_to_le32(0xC0000386)
-#define STATUS_SMARTCARD_IO_ERROR __constant_cpu_to_le32(0xC0000387)
-#define STATUS_DOWNGRADE_DETECTED __constant_cpu_to_le32(0xC0000388)
-#define STATUS_SMARTCARD_CERT_REVOKED __constant_cpu_to_le32(0xC0000389)
-#define STATUS_ISSUING_CA_UNTRUSTED __constant_cpu_to_le32(0xC000038A)
-#define STATUS_REVOCATION_OFFLINE_C __constant_cpu_to_le32(0xC000038B)
-#define STATUS_PKINIT_CLIENT_FAILURE __constant_cpu_to_le32(0xC000038C)
-#define STATUS_SMARTCARD_CERT_EXPIRED __constant_cpu_to_le32(0xC000038D)
-#define STATUS_DRIVER_FAILED_PRIOR_UNLOAD __constant_cpu_to_le32(0xC000038E)
-#define STATUS_SMARTCARD_SILENT_CONTEXT __constant_cpu_to_le32(0xC000038F)
-#define STATUS_PER_USER_TRUST_QUOTA_EXCEEDED __constant_cpu_to_le32(0xC0000401)
-#define STATUS_ALL_USER_TRUST_QUOTA_EXCEEDED __constant_cpu_to_le32(0xC0000402)
-#define STATUS_USER_DELETE_TRUST_QUOTA_EXCEEDED __constant_cpu_to_le32(0xC0000403)
-#define STATUS_DS_NAME_NOT_UNIQUE __constant_cpu_to_le32(0xC0000404)
-#define STATUS_DS_DUPLICATE_ID_FOUND __constant_cpu_to_le32(0xC0000405)
-#define STATUS_DS_GROUP_CONVERSION_ERROR __constant_cpu_to_le32(0xC0000406)
-#define STATUS_VOLSNAP_PREPARE_HIBERNATE __constant_cpu_to_le32(0xC0000407)
-#define STATUS_USER2USER_REQUIRED __constant_cpu_to_le32(0xC0000408)
-#define STATUS_STACK_BUFFER_OVERRUN __constant_cpu_to_le32(0xC0000409)
-#define STATUS_NO_S4U_PROT_SUPPORT __constant_cpu_to_le32(0xC000040A)
-#define STATUS_CROSSREALM_DELEGATION_FAILURE __constant_cpu_to_le32(0xC000040B)
-#define STATUS_REVOCATION_OFFLINE_KDC __constant_cpu_to_le32(0xC000040C)
-#define STATUS_ISSUING_CA_UNTRUSTED_KDC __constant_cpu_to_le32(0xC000040D)
-#define STATUS_KDC_CERT_EXPIRED __constant_cpu_to_le32(0xC000040E)
-#define STATUS_KDC_CERT_REVOKED __constant_cpu_to_le32(0xC000040F)
-#define STATUS_PARAMETER_QUOTA_EXCEEDED __constant_cpu_to_le32(0xC0000410)
-#define STATUS_HIBERNATION_FAILURE __constant_cpu_to_le32(0xC0000411)
-#define STATUS_DELAY_LOAD_FAILED __constant_cpu_to_le32(0xC0000412)
-#define STATUS_AUTHENTICATION_FIREWALL_FAILED __constant_cpu_to_le32(0xC0000413)
-#define STATUS_VDM_DISALLOWED __constant_cpu_to_le32(0xC0000414)
-#define STATUS_HUNG_DISPLAY_DRIVER_THREAD __constant_cpu_to_le32(0xC0000415)
-#define STATUS_INSUFFICIENT_RESOURCE_FOR_SPECIFIED_SHARED_SECTION_SIZE __constant_cpu_to_le32(0xC0000416)
-#define STATUS_INVALID_CRUNTIME_PARAMETER __constant_cpu_to_le32(0xC0000417)
-#define STATUS_NTLM_BLOCKED __constant_cpu_to_le32(0xC0000418)
-#define STATUS_ASSERTION_FAILURE __constant_cpu_to_le32(0xC0000420)
-#define STATUS_VERIFIER_STOP __constant_cpu_to_le32(0xC0000421)
-#define STATUS_CALLBACK_POP_STACK __constant_cpu_to_le32(0xC0000423)
-#define STATUS_INCOMPATIBLE_DRIVER_BLOCKED __constant_cpu_to_le32(0xC0000424)
-#define STATUS_HIVE_UNLOADED __constant_cpu_to_le32(0xC0000425)
-#define STATUS_COMPRESSION_DISABLED __constant_cpu_to_le32(0xC0000426)
-#define STATUS_FILE_SYSTEM_LIMITATION __constant_cpu_to_le32(0xC0000427)
-#define STATUS_INVALID_IMAGE_HASH __constant_cpu_to_le32(0xC0000428)
-#define STATUS_NOT_CAPABLE __constant_cpu_to_le32(0xC0000429)
-#define STATUS_REQUEST_OUT_OF_SEQUENCE __constant_cpu_to_le32(0xC000042A)
-#define STATUS_IMPLEMENTATION_LIMIT __constant_cpu_to_le32(0xC000042B)
-#define STATUS_ELEVATION_REQUIRED __constant_cpu_to_le32(0xC000042C)
-#define STATUS_BEYOND_VDL __constant_cpu_to_le32(0xC0000432)
-#define STATUS_ENCOUNTERED_WRITE_IN_PROGRESS __constant_cpu_to_le32(0xC0000433)
-#define STATUS_PTE_CHANGED __constant_cpu_to_le32(0xC0000434)
-#define STATUS_PURGE_FAILED __constant_cpu_to_le32(0xC0000435)
-#define STATUS_CRED_REQUIRES_CONFIRMATION __constant_cpu_to_le32(0xC0000440)
-#define STATUS_CS_ENCRYPTION_INVALID_SERVER_RESPONSE __constant_cpu_to_le32(0xC0000441)
-#define STATUS_CS_ENCRYPTION_UNSUPPORTED_SERVER __constant_cpu_to_le32(0xC0000442)
-#define STATUS_CS_ENCRYPTION_EXISTING_ENCRYPTED_FILE __constant_cpu_to_le32(0xC0000443)
-#define STATUS_CS_ENCRYPTION_NEW_ENCRYPTED_FILE __constant_cpu_to_le32(0xC0000444)
-#define STATUS_CS_ENCRYPTION_FILE_NOT_CSE __constant_cpu_to_le32(0xC0000445)
-#define STATUS_INVALID_LABEL __constant_cpu_to_le32(0xC0000446)
-#define STATUS_DRIVER_PROCESS_TERMINATED __constant_cpu_to_le32(0xC0000450)
-#define STATUS_AMBIGUOUS_SYSTEM_DEVICE __constant_cpu_to_le32(0xC0000451)
-#define STATUS_SYSTEM_DEVICE_NOT_FOUND __constant_cpu_to_le32(0xC0000452)
-#define STATUS_RESTART_BOOT_APPLICATION __constant_cpu_to_le32(0xC0000453)
-#define STATUS_INVALID_TASK_NAME __constant_cpu_to_le32(0xC0000500)
-#define STATUS_INVALID_TASK_INDEX __constant_cpu_to_le32(0xC0000501)
-#define STATUS_THREAD_ALREADY_IN_TASK __constant_cpu_to_le32(0xC0000502)
-#define STATUS_CALLBACK_BYPASS __constant_cpu_to_le32(0xC0000503)
-#define STATUS_PORT_CLOSED __constant_cpu_to_le32(0xC0000700)
-#define STATUS_MESSAGE_LOST __constant_cpu_to_le32(0xC0000701)
-#define STATUS_INVALID_MESSAGE __constant_cpu_to_le32(0xC0000702)
-#define STATUS_REQUEST_CANCELED __constant_cpu_to_le32(0xC0000703)
-#define STATUS_RECURSIVE_DISPATCH __constant_cpu_to_le32(0xC0000704)
-#define STATUS_LPC_RECEIVE_BUFFER_EXPECTED __constant_cpu_to_le32(0xC0000705)
-#define STATUS_LPC_INVALID_CONNECTION_USAGE __constant_cpu_to_le32(0xC0000706)
-#define STATUS_LPC_REQUESTS_NOT_ALLOWED __constant_cpu_to_le32(0xC0000707)
-#define STATUS_RESOURCE_IN_USE __constant_cpu_to_le32(0xC0000708)
-#define STATUS_HARDWARE_MEMORY_ERROR __constant_cpu_to_le32(0xC0000709)
-#define STATUS_THREADPOOL_HANDLE_EXCEPTION __constant_cpu_to_le32(0xC000070A)
-#define STATUS_THREADPOOL_SET_EVENT_ON_COMPLETION_FAILED __constant_cpu_to_le32(0xC000070B)
-#define STATUS_THREADPOOL_RELEASE_SEMAPHORE_ON_COMPLETION_FAILED __constant_cpu_to_le32(0xC000070C)
-#define STATUS_THREADPOOL_RELEASE_MUTEX_ON_COMPLETION_FAILED __constant_cpu_to_le32(0xC000070D)
-#define STATUS_THREADPOOL_FREE_LIBRARY_ON_COMPLETION_FAILED __constant_cpu_to_le32(0xC000070E)
-#define STATUS_THREADPOOL_RELEASED_DURING_OPERATION __constant_cpu_to_le32(0xC000070F)
-#define STATUS_CALLBACK_RETURNED_WHILE_IMPERSONATING __constant_cpu_to_le32(0xC0000710)
-#define STATUS_APC_RETURNED_WHILE_IMPERSONATING __constant_cpu_to_le32(0xC0000711)
-#define STATUS_PROCESS_IS_PROTECTED __constant_cpu_to_le32(0xC0000712)
-#define STATUS_MCA_EXCEPTION __constant_cpu_to_le32(0xC0000713)
-#define STATUS_CERTIFICATE_MAPPING_NOT_UNIQUE __constant_cpu_to_le32(0xC0000714)
-#define STATUS_SYMLINK_CLASS_DISABLED __constant_cpu_to_le32(0xC0000715)
-#define STATUS_INVALID_IDN_NORMALIZATION __constant_cpu_to_le32(0xC0000716)
-#define STATUS_NO_UNICODE_TRANSLATION __constant_cpu_to_le32(0xC0000717)
-#define STATUS_ALREADY_REGISTERED __constant_cpu_to_le32(0xC0000718)
-#define STATUS_CONTEXT_MISMATCH __constant_cpu_to_le32(0xC0000719)
-#define STATUS_PORT_ALREADY_HAS_COMPLETION_LIST __constant_cpu_to_le32(0xC000071A)
-#define STATUS_CALLBACK_RETURNED_THREAD_PRIORITY __constant_cpu_to_le32(0xC000071B)
-#define STATUS_INVALID_THREAD __constant_cpu_to_le32(0xC000071C)
-#define STATUS_CALLBACK_RETURNED_TRANSACTION __constant_cpu_to_le32(0xC000071D)
-#define STATUS_CALLBACK_RETURNED_LDR_LOCK __constant_cpu_to_le32(0xC000071E)
-#define STATUS_CALLBACK_RETURNED_LANG __constant_cpu_to_le32(0xC000071F)
-#define STATUS_CALLBACK_RETURNED_PRI_BACK __constant_cpu_to_le32(0xC0000720)
-#define STATUS_CALLBACK_RETURNED_THREAD_AFFINITY __constant_cpu_to_le32(0xC0000721)
-#define STATUS_DISK_REPAIR_DISABLED __constant_cpu_to_le32(0xC0000800)
-#define STATUS_DS_DOMAIN_RENAME_IN_PROGRESS __constant_cpu_to_le32(0xC0000801)
-#define STATUS_DISK_QUOTA_EXCEEDED __constant_cpu_to_le32(0xC0000802)
-#define STATUS_CONTENT_BLOCKED __constant_cpu_to_le32(0xC0000804)
-#define STATUS_BAD_CLUSTERS __constant_cpu_to_le32(0xC0000805)
-#define STATUS_VOLUME_DIRTY __constant_cpu_to_le32(0xC0000806)
-#define STATUS_FILE_CHECKED_OUT __constant_cpu_to_le32(0xC0000901)
-#define STATUS_CHECKOUT_REQUIRED __constant_cpu_to_le32(0xC0000902)
-#define STATUS_BAD_FILE_TYPE __constant_cpu_to_le32(0xC0000903)
-#define STATUS_FILE_TOO_LARGE __constant_cpu_to_le32(0xC0000904)
-#define STATUS_FORMS_AUTH_REQUIRED __constant_cpu_to_le32(0xC0000905)
-#define STATUS_VIRUS_INFECTED __constant_cpu_to_le32(0xC0000906)
-#define STATUS_VIRUS_DELETED __constant_cpu_to_le32(0xC0000907)
-#define STATUS_BAD_MCFG_TABLE __constant_cpu_to_le32(0xC0000908)
-#define STATUS_WOW_ASSERTION __constant_cpu_to_le32(0xC0009898)
-#define STATUS_INVALID_SIGNATURE __constant_cpu_to_le32(0xC000A000)
-#define STATUS_HMAC_NOT_SUPPORTED __constant_cpu_to_le32(0xC000A001)
-#define STATUS_IPSEC_QUEUE_OVERFLOW __constant_cpu_to_le32(0xC000A010)
-#define STATUS_ND_QUEUE_OVERFLOW __constant_cpu_to_le32(0xC000A011)
-#define STATUS_HOPLIMIT_EXCEEDED __constant_cpu_to_le32(0xC000A012)
-#define STATUS_PROTOCOL_NOT_SUPPORTED __constant_cpu_to_le32(0xC000A013)
-#define STATUS_LOST_WRITEBEHIND_DATA_NETWORK_DISCONNECTED __constant_cpu_to_le32(0xC000A080)
-#define STATUS_LOST_WRITEBEHIND_DATA_NETWORK_SERVER_ERROR __constant_cpu_to_le32(0xC000A081)
-#define STATUS_LOST_WRITEBEHIND_DATA_LOCAL_DISK_ERROR __constant_cpu_to_le32(0xC000A082)
-#define STATUS_XML_PARSE_ERROR __constant_cpu_to_le32(0xC000A083)
-#define STATUS_XMLDSIG_ERROR __constant_cpu_to_le32(0xC000A084)
-#define STATUS_WRONG_COMPARTMENT __constant_cpu_to_le32(0xC000A085)
-#define STATUS_AUTHIP_FAILURE __constant_cpu_to_le32(0xC000A086)
-#define DBG_NO_STATE_CHANGE __constant_cpu_to_le32(0xC0010001)
-#define DBG_APP_NOT_IDLE __constant_cpu_to_le32(0xC0010002)
-#define RPC_NT_INVALID_STRING_BINDING __constant_cpu_to_le32(0xC0020001)
-#define RPC_NT_WRONG_KIND_OF_BINDING __constant_cpu_to_le32(0xC0020002)
-#define RPC_NT_INVALID_BINDING __constant_cpu_to_le32(0xC0020003)
-#define RPC_NT_PROTSEQ_NOT_SUPPORTED __constant_cpu_to_le32(0xC0020004)
-#define RPC_NT_INVALID_RPC_PROTSEQ __constant_cpu_to_le32(0xC0020005)
-#define RPC_NT_INVALID_STRING_UUID __constant_cpu_to_le32(0xC0020006)
-#define RPC_NT_INVALID_ENDPOINT_FORMAT __constant_cpu_to_le32(0xC0020007)
-#define RPC_NT_INVALID_NET_ADDR __constant_cpu_to_le32(0xC0020008)
-#define RPC_NT_NO_ENDPOINT_FOUND __constant_cpu_to_le32(0xC0020009)
-#define RPC_NT_INVALID_TIMEOUT __constant_cpu_to_le32(0xC002000A)
-#define RPC_NT_OBJECT_NOT_FOUND __constant_cpu_to_le32(0xC002000B)
-#define RPC_NT_ALREADY_REGISTERED __constant_cpu_to_le32(0xC002000C)
-#define RPC_NT_TYPE_ALREADY_REGISTERED __constant_cpu_to_le32(0xC002000D)
-#define RPC_NT_ALREADY_LISTENING __constant_cpu_to_le32(0xC002000E)
-#define RPC_NT_NO_PROTSEQS_REGISTERED __constant_cpu_to_le32(0xC002000F)
-#define RPC_NT_NOT_LISTENING __constant_cpu_to_le32(0xC0020010)
-#define RPC_NT_UNKNOWN_MGR_TYPE __constant_cpu_to_le32(0xC0020011)
-#define RPC_NT_UNKNOWN_IF __constant_cpu_to_le32(0xC0020012)
-#define RPC_NT_NO_BINDINGS __constant_cpu_to_le32(0xC0020013)
-#define RPC_NT_NO_PROTSEQS __constant_cpu_to_le32(0xC0020014)
-#define RPC_NT_CANT_CREATE_ENDPOINT __constant_cpu_to_le32(0xC0020015)
-#define RPC_NT_OUT_OF_RESOURCES __constant_cpu_to_le32(0xC0020016)
-#define RPC_NT_SERVER_UNAVAILABLE __constant_cpu_to_le32(0xC0020017)
-#define RPC_NT_SERVER_TOO_BUSY __constant_cpu_to_le32(0xC0020018)
-#define RPC_NT_INVALID_NETWORK_OPTIONS __constant_cpu_to_le32(0xC0020019)
-#define RPC_NT_NO_CALL_ACTIVE __constant_cpu_to_le32(0xC002001A)
-#define RPC_NT_CALL_FAILED __constant_cpu_to_le32(0xC002001B)
-#define RPC_NT_CALL_FAILED_DNE __constant_cpu_to_le32(0xC002001C)
-#define RPC_NT_PROTOCOL_ERROR __constant_cpu_to_le32(0xC002001D)
-#define RPC_NT_UNSUPPORTED_TRANS_SYN __constant_cpu_to_le32(0xC002001F)
-#define RPC_NT_UNSUPPORTED_TYPE __constant_cpu_to_le32(0xC0020021)
-#define RPC_NT_INVALID_TAG __constant_cpu_to_le32(0xC0020022)
-#define RPC_NT_INVALID_BOUND __constant_cpu_to_le32(0xC0020023)
-#define RPC_NT_NO_ENTRY_NAME __constant_cpu_to_le32(0xC0020024)
-#define RPC_NT_INVALID_NAME_SYNTAX __constant_cpu_to_le32(0xC0020025)
-#define RPC_NT_UNSUPPORTED_NAME_SYNTAX __constant_cpu_to_le32(0xC0020026)
-#define RPC_NT_UUID_NO_ADDRESS __constant_cpu_to_le32(0xC0020028)
-#define RPC_NT_DUPLICATE_ENDPOINT __constant_cpu_to_le32(0xC0020029)
-#define RPC_NT_UNKNOWN_AUTHN_TYPE __constant_cpu_to_le32(0xC002002A)
-#define RPC_NT_MAX_CALLS_TOO_SMALL __constant_cpu_to_le32(0xC002002B)
-#define RPC_NT_STRING_TOO_LONG __constant_cpu_to_le32(0xC002002C)
-#define RPC_NT_PROTSEQ_NOT_FOUND __constant_cpu_to_le32(0xC002002D)
-#define RPC_NT_PROCNUM_OUT_OF_RANGE __constant_cpu_to_le32(0xC002002E)
-#define RPC_NT_BINDING_HAS_NO_AUTH __constant_cpu_to_le32(0xC002002F)
-#define RPC_NT_UNKNOWN_AUTHN_SERVICE __constant_cpu_to_le32(0xC0020030)
-#define RPC_NT_UNKNOWN_AUTHN_LEVEL __constant_cpu_to_le32(0xC0020031)
-#define RPC_NT_INVALID_AUTH_IDENTITY __constant_cpu_to_le32(0xC0020032)
-#define RPC_NT_UNKNOWN_AUTHZ_SERVICE __constant_cpu_to_le32(0xC0020033)
-#define EPT_NT_INVALID_ENTRY __constant_cpu_to_le32(0xC0020034)
-#define EPT_NT_CANT_PERFORM_OP __constant_cpu_to_le32(0xC0020035)
-#define EPT_NT_NOT_REGISTERED __constant_cpu_to_le32(0xC0020036)
-#define RPC_NT_NOTHING_TO_EXPORT __constant_cpu_to_le32(0xC0020037)
-#define RPC_NT_INCOMPLETE_NAME __constant_cpu_to_le32(0xC0020038)
-#define RPC_NT_INVALID_VERS_OPTION __constant_cpu_to_le32(0xC0020039)
-#define RPC_NT_NO_MORE_MEMBERS __constant_cpu_to_le32(0xC002003A)
-#define RPC_NT_NOT_ALL_OBJS_UNEXPORTED __constant_cpu_to_le32(0xC002003B)
-#define RPC_NT_INTERFACE_NOT_FOUND __constant_cpu_to_le32(0xC002003C)
-#define RPC_NT_ENTRY_ALREADY_EXISTS __constant_cpu_to_le32(0xC002003D)
-#define RPC_NT_ENTRY_NOT_FOUND __constant_cpu_to_le32(0xC002003E)
-#define RPC_NT_NAME_SERVICE_UNAVAILABLE __constant_cpu_to_le32(0xC002003F)
-#define RPC_NT_INVALID_NAF_ID __constant_cpu_to_le32(0xC0020040)
-#define RPC_NT_CANNOT_SUPPORT __constant_cpu_to_le32(0xC0020041)
-#define RPC_NT_NO_CONTEXT_AVAILABLE __constant_cpu_to_le32(0xC0020042)
-#define RPC_NT_INTERNAL_ERROR __constant_cpu_to_le32(0xC0020043)
-#define RPC_NT_ZERO_DIVIDE __constant_cpu_to_le32(0xC0020044)
-#define RPC_NT_ADDRESS_ERROR __constant_cpu_to_le32(0xC0020045)
-#define RPC_NT_FP_DIV_ZERO __constant_cpu_to_le32(0xC0020046)
-#define RPC_NT_FP_UNDERFLOW __constant_cpu_to_le32(0xC0020047)
-#define RPC_NT_FP_OVERFLOW __constant_cpu_to_le32(0xC0020048)
-#define RPC_NT_CALL_IN_PROGRESS __constant_cpu_to_le32(0xC0020049)
-#define RPC_NT_NO_MORE_BINDINGS __constant_cpu_to_le32(0xC002004A)
-#define RPC_NT_GROUP_MEMBER_NOT_FOUND __constant_cpu_to_le32(0xC002004B)
-#define EPT_NT_CANT_CREATE __constant_cpu_to_le32(0xC002004C)
-#define RPC_NT_INVALID_OBJECT __constant_cpu_to_le32(0xC002004D)
-#define RPC_NT_NO_INTERFACES __constant_cpu_to_le32(0xC002004F)
-#define RPC_NT_CALL_CANCELLED __constant_cpu_to_le32(0xC0020050)
-#define RPC_NT_BINDING_INCOMPLETE __constant_cpu_to_le32(0xC0020051)
-#define RPC_NT_COMM_FAILURE __constant_cpu_to_le32(0xC0020052)
-#define RPC_NT_UNSUPPORTED_AUTHN_LEVEL __constant_cpu_to_le32(0xC0020053)
-#define RPC_NT_NO_PRINC_NAME __constant_cpu_to_le32(0xC0020054)
-#define RPC_NT_NOT_RPC_ERROR __constant_cpu_to_le32(0xC0020055)
-#define RPC_NT_SEC_PKG_ERROR __constant_cpu_to_le32(0xC0020057)
-#define RPC_NT_NOT_CANCELLED __constant_cpu_to_le32(0xC0020058)
-#define RPC_NT_INVALID_ASYNC_HANDLE __constant_cpu_to_le32(0xC0020062)
-#define RPC_NT_INVALID_ASYNC_CALL __constant_cpu_to_le32(0xC0020063)
-#define RPC_NT_PROXY_ACCESS_DENIED __constant_cpu_to_le32(0xC0020064)
-#define RPC_NT_NO_MORE_ENTRIES __constant_cpu_to_le32(0xC0030001)
-#define RPC_NT_SS_CHAR_TRANS_OPEN_FAIL __constant_cpu_to_le32(0xC0030002)
-#define RPC_NT_SS_CHAR_TRANS_SHORT_FILE __constant_cpu_to_le32(0xC0030003)
-#define RPC_NT_SS_IN_NULL_CONTEXT __constant_cpu_to_le32(0xC0030004)
-#define RPC_NT_SS_CONTEXT_MISMATCH __constant_cpu_to_le32(0xC0030005)
-#define RPC_NT_SS_CONTEXT_DAMAGED __constant_cpu_to_le32(0xC0030006)
-#define RPC_NT_SS_HANDLES_MISMATCH __constant_cpu_to_le32(0xC0030007)
-#define RPC_NT_SS_CANNOT_GET_CALL_HANDLE __constant_cpu_to_le32(0xC0030008)
-#define RPC_NT_NULL_REF_POINTER __constant_cpu_to_le32(0xC0030009)
-#define RPC_NT_ENUM_VALUE_OUT_OF_RANGE __constant_cpu_to_le32(0xC003000A)
-#define RPC_NT_BYTE_COUNT_TOO_SMALL __constant_cpu_to_le32(0xC003000B)
-#define RPC_NT_BAD_STUB_DATA __constant_cpu_to_le32(0xC003000C)
-#define RPC_NT_INVALID_ES_ACTION __constant_cpu_to_le32(0xC0030059)
-#define RPC_NT_WRONG_ES_VERSION __constant_cpu_to_le32(0xC003005A)
-#define RPC_NT_WRONG_STUB_VERSION __constant_cpu_to_le32(0xC003005B)
-#define RPC_NT_INVALID_PIPE_OBJECT __constant_cpu_to_le32(0xC003005C)
-#define RPC_NT_INVALID_PIPE_OPERATION __constant_cpu_to_le32(0xC003005D)
-#define RPC_NT_WRONG_PIPE_VERSION __constant_cpu_to_le32(0xC003005E)
-#define RPC_NT_PIPE_CLOSED __constant_cpu_to_le32(0xC003005F)
-#define RPC_NT_PIPE_DISCIPLINE_ERROR __constant_cpu_to_le32(0xC0030060)
-#define RPC_NT_PIPE_EMPTY __constant_cpu_to_le32(0xC0030061)
-#define STATUS_PNP_BAD_MPS_TABLE __constant_cpu_to_le32(0xC0040035)
-#define STATUS_PNP_TRANSLATION_FAILED __constant_cpu_to_le32(0xC0040036)
-#define STATUS_PNP_IRQ_TRANSLATION_FAILED __constant_cpu_to_le32(0xC0040037)
-#define STATUS_PNP_INVALID_ID __constant_cpu_to_le32(0xC0040038)
-#define STATUS_IO_REISSUE_AS_CACHED __constant_cpu_to_le32(0xC0040039)
-#define STATUS_CTX_WINSTATION_NAME_INVALID __constant_cpu_to_le32(0xC00A0001)
-#define STATUS_CTX_INVALID_PD __constant_cpu_to_le32(0xC00A0002)
-#define STATUS_CTX_PD_NOT_FOUND __constant_cpu_to_le32(0xC00A0003)
-#define STATUS_CTX_CLOSE_PENDING __constant_cpu_to_le32(0xC00A0006)
-#define STATUS_CTX_NO_OUTBUF __constant_cpu_to_le32(0xC00A0007)
-#define STATUS_CTX_MODEM_INF_NOT_FOUND __constant_cpu_to_le32(0xC00A0008)
-#define STATUS_CTX_INVALID_MODEMNAME __constant_cpu_to_le32(0xC00A0009)
-#define STATUS_CTX_RESPONSE_ERROR __constant_cpu_to_le32(0xC00A000A)
-#define STATUS_CTX_MODEM_RESPONSE_TIMEOUT __constant_cpu_to_le32(0xC00A000B)
-#define STATUS_CTX_MODEM_RESPONSE_NO_CARRIER __constant_cpu_to_le32(0xC00A000C)
-#define STATUS_CTX_MODEM_RESPONSE_NO_DIALTONE __constant_cpu_to_le32(0xC00A000D)
-#define STATUS_CTX_MODEM_RESPONSE_BUSY __constant_cpu_to_le32(0xC00A000E)
-#define STATUS_CTX_MODEM_RESPONSE_VOICE __constant_cpu_to_le32(0xC00A000F)
-#define STATUS_CTX_TD_ERROR __constant_cpu_to_le32(0xC00A0010)
-#define STATUS_CTX_LICENSE_CLIENT_INVALID __constant_cpu_to_le32(0xC00A0012)
-#define STATUS_CTX_LICENSE_NOT_AVAILABLE __constant_cpu_to_le32(0xC00A0013)
-#define STATUS_CTX_LICENSE_EXPIRED __constant_cpu_to_le32(0xC00A0014)
-#define STATUS_CTX_WINSTATION_NOT_FOUND __constant_cpu_to_le32(0xC00A0015)
-#define STATUS_CTX_WINSTATION_NAME_COLLISION __constant_cpu_to_le32(0xC00A0016)
-#define STATUS_CTX_WINSTATION_BUSY __constant_cpu_to_le32(0xC00A0017)
-#define STATUS_CTX_BAD_VIDEO_MODE __constant_cpu_to_le32(0xC00A0018)
-#define STATUS_CTX_GRAPHICS_INVALID __constant_cpu_to_le32(0xC00A0022)
-#define STATUS_CTX_NOT_CONSOLE __constant_cpu_to_le32(0xC00A0024)
-#define STATUS_CTX_CLIENT_QUERY_TIMEOUT __constant_cpu_to_le32(0xC00A0026)
-#define STATUS_CTX_CONSOLE_DISCONNECT __constant_cpu_to_le32(0xC00A0027)
-#define STATUS_CTX_CONSOLE_CONNECT __constant_cpu_to_le32(0xC00A0028)
-#define STATUS_CTX_SHADOW_DENIED __constant_cpu_to_le32(0xC00A002A)
-#define STATUS_CTX_WINSTATION_ACCESS_DENIED __constant_cpu_to_le32(0xC00A002B)
-#define STATUS_CTX_INVALID_WD __constant_cpu_to_le32(0xC00A002E)
-#define STATUS_CTX_WD_NOT_FOUND __constant_cpu_to_le32(0xC00A002F)
-#define STATUS_CTX_SHADOW_INVALID __constant_cpu_to_le32(0xC00A0030)
-#define STATUS_CTX_SHADOW_DISABLED __constant_cpu_to_le32(0xC00A0031)
-#define STATUS_RDP_PROTOCOL_ERROR __constant_cpu_to_le32(0xC00A0032)
-#define STATUS_CTX_CLIENT_LICENSE_NOT_SET __constant_cpu_to_le32(0xC00A0033)
-#define STATUS_CTX_CLIENT_LICENSE_IN_USE __constant_cpu_to_le32(0xC00A0034)
-#define STATUS_CTX_SHADOW_ENDED_BY_MODE_CHANGE __constant_cpu_to_le32(0xC00A0035)
-#define STATUS_CTX_SHADOW_NOT_RUNNING __constant_cpu_to_le32(0xC00A0036)
-#define STATUS_CTX_LOGON_DISABLED __constant_cpu_to_le32(0xC00A0037)
-#define STATUS_CTX_SECURITY_LAYER_ERROR __constant_cpu_to_le32(0xC00A0038)
-#define STATUS_TS_INCOMPATIBLE_SESSIONS __constant_cpu_to_le32(0xC00A0039)
-#define STATUS_MUI_FILE_NOT_FOUND __constant_cpu_to_le32(0xC00B0001)
-#define STATUS_MUI_INVALID_FILE __constant_cpu_to_le32(0xC00B0002)
-#define STATUS_MUI_INVALID_RC_CONFIG __constant_cpu_to_le32(0xC00B0003)
-#define STATUS_MUI_INVALID_LOCALE_NAME __constant_cpu_to_le32(0xC00B0004)
-#define STATUS_MUI_INVALID_ULTIMATEFALLBACK_NAME __constant_cpu_to_le32(0xC00B0005)
-#define STATUS_MUI_FILE_NOT_LOADED __constant_cpu_to_le32(0xC00B0006)
-#define STATUS_RESOURCE_ENUM_USER_STOP __constant_cpu_to_le32(0xC00B0007)
-#define STATUS_CLUSTER_INVALID_NODE __constant_cpu_to_le32(0xC0130001)
-#define STATUS_CLUSTER_NODE_EXISTS __constant_cpu_to_le32(0xC0130002)
-#define STATUS_CLUSTER_JOIN_IN_PROGRESS __constant_cpu_to_le32(0xC0130003)
-#define STATUS_CLUSTER_NODE_NOT_FOUND __constant_cpu_to_le32(0xC0130004)
-#define STATUS_CLUSTER_LOCAL_NODE_NOT_FOUND __constant_cpu_to_le32(0xC0130005)
-#define STATUS_CLUSTER_NETWORK_EXISTS __constant_cpu_to_le32(0xC0130006)
-#define STATUS_CLUSTER_NETWORK_NOT_FOUND __constant_cpu_to_le32(0xC0130007)
-#define STATUS_CLUSTER_NETINTERFACE_EXISTS __constant_cpu_to_le32(0xC0130008)
-#define STATUS_CLUSTER_NETINTERFACE_NOT_FOUND __constant_cpu_to_le32(0xC0130009)
-#define STATUS_CLUSTER_INVALID_REQUEST __constant_cpu_to_le32(0xC013000A)
-#define STATUS_CLUSTER_INVALID_NETWORK_PROVIDER __constant_cpu_to_le32(0xC013000B)
-#define STATUS_CLUSTER_NODE_DOWN __constant_cpu_to_le32(0xC013000C)
-#define STATUS_CLUSTER_NODE_UNREACHABLE __constant_cpu_to_le32(0xC013000D)
-#define STATUS_CLUSTER_NODE_NOT_MEMBER __constant_cpu_to_le32(0xC013000E)
-#define STATUS_CLUSTER_JOIN_NOT_IN_PROGRESS __constant_cpu_to_le32(0xC013000F)
-#define STATUS_CLUSTER_INVALID_NETWORK __constant_cpu_to_le32(0xC0130010)
-#define STATUS_CLUSTER_NO_NET_ADAPTERS __constant_cpu_to_le32(0xC0130011)
-#define STATUS_CLUSTER_NODE_UP __constant_cpu_to_le32(0xC0130012)
-#define STATUS_CLUSTER_NODE_PAUSED __constant_cpu_to_le32(0xC0130013)
-#define STATUS_CLUSTER_NODE_NOT_PAUSED __constant_cpu_to_le32(0xC0130014)
-#define STATUS_CLUSTER_NO_SECURITY_CONTEXT __constant_cpu_to_le32(0xC0130015)
-#define STATUS_CLUSTER_NETWORK_NOT_INTERNAL __constant_cpu_to_le32(0xC0130016)
-#define STATUS_CLUSTER_POISONED __constant_cpu_to_le32(0xC0130017)
-#define STATUS_ACPI_INVALID_OPCODE __constant_cpu_to_le32(0xC0140001)
-#define STATUS_ACPI_STACK_OVERFLOW __constant_cpu_to_le32(0xC0140002)
-#define STATUS_ACPI_ASSERT_FAILED __constant_cpu_to_le32(0xC0140003)
-#define STATUS_ACPI_INVALID_INDEX __constant_cpu_to_le32(0xC0140004)
-#define STATUS_ACPI_INVALID_ARGUMENT __constant_cpu_to_le32(0xC0140005)
-#define STATUS_ACPI_FATAL __constant_cpu_to_le32(0xC0140006)
-#define STATUS_ACPI_INVALID_SUPERNAME __constant_cpu_to_le32(0xC0140007)
-#define STATUS_ACPI_INVALID_ARGTYPE __constant_cpu_to_le32(0xC0140008)
-#define STATUS_ACPI_INVALID_OBJTYPE __constant_cpu_to_le32(0xC0140009)
-#define STATUS_ACPI_INVALID_TARGETTYPE __constant_cpu_to_le32(0xC014000A)
-#define STATUS_ACPI_INCORRECT_ARGUMENT_COUNT __constant_cpu_to_le32(0xC014000B)
-#define STATUS_ACPI_ADDRESS_NOT_MAPPED __constant_cpu_to_le32(0xC014000C)
-#define STATUS_ACPI_INVALID_EVENTTYPE __constant_cpu_to_le32(0xC014000D)
-#define STATUS_ACPI_HANDLER_COLLISION __constant_cpu_to_le32(0xC014000E)
-#define STATUS_ACPI_INVALID_DATA __constant_cpu_to_le32(0xC014000F)
-#define STATUS_ACPI_INVALID_REGION __constant_cpu_to_le32(0xC0140010)
-#define STATUS_ACPI_INVALID_ACCESS_SIZE __constant_cpu_to_le32(0xC0140011)
-#define STATUS_ACPI_ACQUIRE_GLOBAL_LOCK __constant_cpu_to_le32(0xC0140012)
-#define STATUS_ACPI_ALREADY_INITIALIZED __constant_cpu_to_le32(0xC0140013)
-#define STATUS_ACPI_NOT_INITIALIZED __constant_cpu_to_le32(0xC0140014)
-#define STATUS_ACPI_INVALID_MUTEX_LEVEL __constant_cpu_to_le32(0xC0140015)
-#define STATUS_ACPI_MUTEX_NOT_OWNED __constant_cpu_to_le32(0xC0140016)
-#define STATUS_ACPI_MUTEX_NOT_OWNER __constant_cpu_to_le32(0xC0140017)
-#define STATUS_ACPI_RS_ACCESS __constant_cpu_to_le32(0xC0140018)
-#define STATUS_ACPI_INVALID_TABLE __constant_cpu_to_le32(0xC0140019)
-#define STATUS_ACPI_REG_HANDLER_FAILED __constant_cpu_to_le32(0xC0140020)
-#define STATUS_ACPI_POWER_REQUEST_FAILED __constant_cpu_to_le32(0xC0140021)
-#define STATUS_SXS_SECTION_NOT_FOUND __constant_cpu_to_le32(0xC0150001)
-#define STATUS_SXS_CANT_GEN_ACTCTX __constant_cpu_to_le32(0xC0150002)
-#define STATUS_SXS_INVALID_ACTCTXDATA_FORMAT __constant_cpu_to_le32(0xC0150003)
-#define STATUS_SXS_ASSEMBLY_NOT_FOUND __constant_cpu_to_le32(0xC0150004)
-#define STATUS_SXS_MANIFEST_FORMAT_ERROR __constant_cpu_to_le32(0xC0150005)
-#define STATUS_SXS_MANIFEST_PARSE_ERROR __constant_cpu_to_le32(0xC0150006)
-#define STATUS_SXS_ACTIVATION_CONTEXT_DISABLED __constant_cpu_to_le32(0xC0150007)
-#define STATUS_SXS_KEY_NOT_FOUND __constant_cpu_to_le32(0xC0150008)
-#define STATUS_SXS_VERSION_CONFLICT __constant_cpu_to_le32(0xC0150009)
-#define STATUS_SXS_WRONG_SECTION_TYPE __constant_cpu_to_le32(0xC015000A)
-#define STATUS_SXS_THREAD_QUERIES_DISABLED __constant_cpu_to_le32(0xC015000B)
-#define STATUS_SXS_ASSEMBLY_MISSING __constant_cpu_to_le32(0xC015000C)
-#define STATUS_SXS_PROCESS_DEFAULT_ALREADY_SET __constant_cpu_to_le32(0xC015000E)
-#define STATUS_SXS_EARLY_DEACTIVATION __constant_cpu_to_le32(0xC015000F)
-#define STATUS_SXS_INVALID_DEACTIVATION __constant_cpu_to_le32(0xC0150010)
-#define STATUS_SXS_MULTIPLE_DEACTIVATION __constant_cpu_to_le32(0xC0150011)
-#define STATUS_SXS_SYSTEM_DEFAULT_ACTIVATION_CONTEXT_EMPTY __constant_cpu_to_le32(0xC0150012)
-#define STATUS_SXS_PROCESS_TERMINATION_REQUESTED __constant_cpu_to_le32(0xC0150013)
-#define STATUS_SXS_CORRUPT_ACTIVATION_STACK __constant_cpu_to_le32(0xC0150014)
-#define STATUS_SXS_CORRUPTION __constant_cpu_to_le32(0xC0150015)
-#define STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_VALUE __constant_cpu_to_le32(0xC0150016)
-#define STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_NAME __constant_cpu_to_le32(0xC0150017)
-#define STATUS_SXS_IDENTITY_DUPLICATE_ATTRIBUTE __constant_cpu_to_le32(0xC0150018)
-#define STATUS_SXS_IDENTITY_PARSE_ERROR __constant_cpu_to_le32(0xC0150019)
-#define STATUS_SXS_COMPONENT_STORE_CORRUPT __constant_cpu_to_le32(0xC015001A)
-#define STATUS_SXS_FILE_HASH_MISMATCH __constant_cpu_to_le32(0xC015001B)
-#define STATUS_SXS_MANIFEST_IDENTITY_SAME_BUT_CONTENTS_DIFFERENT __constant_cpu_to_le32(0xC015001C)
-#define STATUS_SXS_IDENTITIES_DIFFERENT __constant_cpu_to_le32(0xC015001D)
-#define STATUS_SXS_ASSEMBLY_IS_NOT_A_DEPLOYMENT __constant_cpu_to_le32(0xC015001E)
-#define STATUS_SXS_FILE_NOT_PART_OF_ASSEMBLY __constant_cpu_to_le32(0xC015001F)
-#define STATUS_ADVANCED_INSTALLER_FAILED __constant_cpu_to_le32(0xC0150020)
-#define STATUS_XML_ENCODING_MISMATCH __constant_cpu_to_le32(0xC0150021)
-#define STATUS_SXS_MANIFEST_TOO_BIG __constant_cpu_to_le32(0xC0150022)
-#define STATUS_SXS_SETTING_NOT_REGISTERED __constant_cpu_to_le32(0xC0150023)
-#define STATUS_SXS_TRANSACTION_CLOSURE_INCOMPLETE __constant_cpu_to_le32(0xC0150024)
-#define STATUS_SMI_PRIMITIVE_INSTALLER_FAILED __constant_cpu_to_le32(0xC0150025)
-#define STATUS_GENERIC_COMMAND_FAILED __constant_cpu_to_le32(0xC0150026)
-#define STATUS_SXS_FILE_HASH_MISSING __constant_cpu_to_le32(0xC0150027)
-#define STATUS_TRANSACTIONAL_CONFLICT __constant_cpu_to_le32(0xC0190001)
-#define STATUS_INVALID_TRANSACTION __constant_cpu_to_le32(0xC0190002)
-#define STATUS_TRANSACTION_NOT_ACTIVE __constant_cpu_to_le32(0xC0190003)
-#define STATUS_TM_INITIALIZATION_FAILED __constant_cpu_to_le32(0xC0190004)
-#define STATUS_RM_NOT_ACTIVE __constant_cpu_to_le32(0xC0190005)
-#define STATUS_RM_METADATA_CORRUPT __constant_cpu_to_le32(0xC0190006)
-#define STATUS_TRANSACTION_NOT_JOINED __constant_cpu_to_le32(0xC0190007)
-#define STATUS_DIRECTORY_NOT_RM __constant_cpu_to_le32(0xC0190008)
-#define STATUS_TRANSACTIONS_UNSUPPORTED_REMOTE __constant_cpu_to_le32(0xC019000A)
-#define STATUS_LOG_RESIZE_INVALID_SIZE __constant_cpu_to_le32(0xC019000B)
-#define STATUS_REMOTE_FILE_VERSION_MISMATCH __constant_cpu_to_le32(0xC019000C)
-#define STATUS_CRM_PROTOCOL_ALREADY_EXISTS __constant_cpu_to_le32(0xC019000F)
-#define STATUS_TRANSACTION_PROPAGATION_FAILED __constant_cpu_to_le32(0xC0190010)
-#define STATUS_CRM_PROTOCOL_NOT_FOUND __constant_cpu_to_le32(0xC0190011)
-#define STATUS_TRANSACTION_SUPERIOR_EXISTS __constant_cpu_to_le32(0xC0190012)
-#define STATUS_TRANSACTION_REQUEST_NOT_VALID __constant_cpu_to_le32(0xC0190013)
-#define STATUS_TRANSACTION_NOT_REQUESTED __constant_cpu_to_le32(0xC0190014)
-#define STATUS_TRANSACTION_ALREADY_ABORTED __constant_cpu_to_le32(0xC0190015)
-#define STATUS_TRANSACTION_ALREADY_COMMITTED __constant_cpu_to_le32(0xC0190016)
-#define STATUS_TRANSACTION_INVALID_MARSHALL_BUFFER __constant_cpu_to_le32(0xC0190017)
-#define STATUS_CURRENT_TRANSACTION_NOT_VALID __constant_cpu_to_le32(0xC0190018)
-#define STATUS_LOG_GROWTH_FAILED __constant_cpu_to_le32(0xC0190019)
-#define STATUS_OBJECT_NO_LONGER_EXISTS __constant_cpu_to_le32(0xC0190021)
-#define STATUS_STREAM_MINIVERSION_NOT_FOUND __constant_cpu_to_le32(0xC0190022)
-#define STATUS_STREAM_MINIVERSION_NOT_VALID __constant_cpu_to_le32(0xC0190023)
-#define STATUS_MINIVERSION_INACCESSIBLE_FROM_SPECIFIED_TRANSACTION __constant_cpu_to_le32(0xC0190024)
-#define STATUS_CANT_OPEN_MINIVERSION_WITH_MODIFY_INTENT __constant_cpu_to_le32(0xC0190025)
-#define STATUS_CANT_CREATE_MORE_STREAM_MINIVERSIONS __constant_cpu_to_le32(0xC0190026)
-#define STATUS_HANDLE_NO_LONGER_VALID __constant_cpu_to_le32(0xC0190028)
-#define STATUS_LOG_CORRUPTION_DETECTED __constant_cpu_to_le32(0xC0190030)
-#define STATUS_RM_DISCONNECTED __constant_cpu_to_le32(0xC0190032)
-#define STATUS_ENLISTMENT_NOT_SUPERIOR __constant_cpu_to_le32(0xC0190033)
-#define STATUS_FILE_IDENTITY_NOT_PERSISTENT __constant_cpu_to_le32(0xC0190036)
-#define STATUS_CANT_BREAK_TRANSACTIONAL_DEPENDENCY __constant_cpu_to_le32(0xC0190037)
-#define STATUS_CANT_CROSS_RM_BOUNDARY __constant_cpu_to_le32(0xC0190038)
-#define STATUS_TXF_DIR_NOT_EMPTY __constant_cpu_to_le32(0xC0190039)
-#define STATUS_INDOUBT_TRANSACTIONS_EXIST __constant_cpu_to_le32(0xC019003A)
-#define STATUS_TM_VOLATILE __constant_cpu_to_le32(0xC019003B)
-#define STATUS_ROLLBACK_TIMER_EXPIRED __constant_cpu_to_le32(0xC019003C)
-#define STATUS_TXF_ATTRIBUTE_CORRUPT __constant_cpu_to_le32(0xC019003D)
-#define STATUS_EFS_NOT_ALLOWED_IN_TRANSACTION __constant_cpu_to_le32(0xC019003E)
-#define STATUS_TRANSACTIONAL_OPEN_NOT_ALLOWED __constant_cpu_to_le32(0xC019003F)
-#define STATUS_TRANSACTED_MAPPING_UNSUPPORTED_REMOTE __constant_cpu_to_le32(0xC0190040)
-#define STATUS_TRANSACTION_REQUIRED_PROMOTION __constant_cpu_to_le32(0xC0190043)
-#define STATUS_CANNOT_EXECUTE_FILE_IN_TRANSACTION __constant_cpu_to_le32(0xC0190044)
-#define STATUS_TRANSACTIONS_NOT_FROZEN __constant_cpu_to_le32(0xC0190045)
-#define STATUS_TRANSACTION_FREEZE_IN_PROGRESS __constant_cpu_to_le32(0xC0190046)
-#define STATUS_NOT_SNAPSHOT_VOLUME __constant_cpu_to_le32(0xC0190047)
-#define STATUS_NO_SAVEPOINT_WITH_OPEN_FILES __constant_cpu_to_le32(0xC0190048)
-#define STATUS_SPARSE_NOT_ALLOWED_IN_TRANSACTION __constant_cpu_to_le32(0xC0190049)
-#define STATUS_TM_IDENTITY_MISMATCH __constant_cpu_to_le32(0xC019004A)
-#define STATUS_FLOATED_SECTION __constant_cpu_to_le32(0xC019004B)
-#define STATUS_CANNOT_ACCEPT_TRANSACTED_WORK __constant_cpu_to_le32(0xC019004C)
-#define STATUS_CANNOT_ABORT_TRANSACTIONS __constant_cpu_to_le32(0xC019004D)
-#define STATUS_TRANSACTION_NOT_FOUND __constant_cpu_to_le32(0xC019004E)
-#define STATUS_RESOURCEMANAGER_NOT_FOUND __constant_cpu_to_le32(0xC019004F)
-#define STATUS_ENLISTMENT_NOT_FOUND __constant_cpu_to_le32(0xC0190050)
-#define STATUS_TRANSACTIONMANAGER_NOT_FOUND __constant_cpu_to_le32(0xC0190051)
-#define STATUS_TRANSACTIONMANAGER_NOT_ONLINE __constant_cpu_to_le32(0xC0190052)
-#define STATUS_TRANSACTIONMANAGER_RECOVERY_NAME_COLLISION __constant_cpu_to_le32(0xC0190053)
-#define STATUS_TRANSACTION_NOT_ROOT __constant_cpu_to_le32(0xC0190054)
-#define STATUS_TRANSACTION_OBJECT_EXPIRED __constant_cpu_to_le32(0xC0190055)
-#define STATUS_COMPRESSION_NOT_ALLOWED_IN_TRANSACTION __constant_cpu_to_le32(0xC0190056)
-#define STATUS_TRANSACTION_RESPONSE_NOT_ENLISTED __constant_cpu_to_le32(0xC0190057)
-#define STATUS_TRANSACTION_RECORD_TOO_LONG __constant_cpu_to_le32(0xC0190058)
-#define STATUS_NO_LINK_TRACKING_IN_TRANSACTION __constant_cpu_to_le32(0xC0190059)
-#define STATUS_OPERATION_NOT_SUPPORTED_IN_TRANSACTION __constant_cpu_to_le32(0xC019005A)
-#define STATUS_TRANSACTION_INTEGRITY_VIOLATED __constant_cpu_to_le32(0xC019005B)
-#define STATUS_LOG_SECTOR_INVALID __constant_cpu_to_le32(0xC01A0001)
-#define STATUS_LOG_SECTOR_PARITY_INVALID __constant_cpu_to_le32(0xC01A0002)
-#define STATUS_LOG_SECTOR_REMAPPED __constant_cpu_to_le32(0xC01A0003)
-#define STATUS_LOG_BLOCK_INCOMPLETE __constant_cpu_to_le32(0xC01A0004)
-#define STATUS_LOG_INVALID_RANGE __constant_cpu_to_le32(0xC01A0005)
-#define STATUS_LOG_BLOCKS_EXHAUSTED __constant_cpu_to_le32(0xC01A0006)
-#define STATUS_LOG_READ_CONTEXT_INVALID __constant_cpu_to_le32(0xC01A0007)
-#define STATUS_LOG_RESTART_INVALID __constant_cpu_to_le32(0xC01A0008)
-#define STATUS_LOG_BLOCK_VERSION __constant_cpu_to_le32(0xC01A0009)
-#define STATUS_LOG_BLOCK_INVALID __constant_cpu_to_le32(0xC01A000A)
-#define STATUS_LOG_READ_MODE_INVALID __constant_cpu_to_le32(0xC01A000B)
-#define STATUS_LOG_METADATA_CORRUPT __constant_cpu_to_le32(0xC01A000D)
-#define STATUS_LOG_METADATA_INVALID __constant_cpu_to_le32(0xC01A000E)
-#define STATUS_LOG_METADATA_INCONSISTENT __constant_cpu_to_le32(0xC01A000F)
-#define STATUS_LOG_RESERVATION_INVALID __constant_cpu_to_le32(0xC01A0010)
-#define STATUS_LOG_CANT_DELETE __constant_cpu_to_le32(0xC01A0011)
-#define STATUS_LOG_CONTAINER_LIMIT_EXCEEDED __constant_cpu_to_le32(0xC01A0012)
-#define STATUS_LOG_START_OF_LOG __constant_cpu_to_le32(0xC01A0013)
-#define STATUS_LOG_POLICY_ALREADY_INSTALLED __constant_cpu_to_le32(0xC01A0014)
-#define STATUS_LOG_POLICY_NOT_INSTALLED __constant_cpu_to_le32(0xC01A0015)
-#define STATUS_LOG_POLICY_INVALID __constant_cpu_to_le32(0xC01A0016)
-#define STATUS_LOG_POLICY_CONFLICT __constant_cpu_to_le32(0xC01A0017)
-#define STATUS_LOG_PINNED_ARCHIVE_TAIL __constant_cpu_to_le32(0xC01A0018)
-#define STATUS_LOG_RECORD_NONEXISTENT __constant_cpu_to_le32(0xC01A0019)
-#define STATUS_LOG_RECORDS_RESERVED_INVALID __constant_cpu_to_le32(0xC01A001A)
-#define STATUS_LOG_SPACE_RESERVED_INVALID __constant_cpu_to_le32(0xC01A001B)
-#define STATUS_LOG_TAIL_INVALID __constant_cpu_to_le32(0xC01A001C)
-#define STATUS_LOG_FULL __constant_cpu_to_le32(0xC01A001D)
-#define STATUS_LOG_MULTIPLEXED __constant_cpu_to_le32(0xC01A001E)
-#define STATUS_LOG_DEDICATED __constant_cpu_to_le32(0xC01A001F)
-#define STATUS_LOG_ARCHIVE_NOT_IN_PROGRESS __constant_cpu_to_le32(0xC01A0020)
-#define STATUS_LOG_ARCHIVE_IN_PROGRESS __constant_cpu_to_le32(0xC01A0021)
-#define STATUS_LOG_EPHEMERAL __constant_cpu_to_le32(0xC01A0022)
-#define STATUS_LOG_NOT_ENOUGH_CONTAINERS __constant_cpu_to_le32(0xC01A0023)
-#define STATUS_LOG_CLIENT_ALREADY_REGISTERED __constant_cpu_to_le32(0xC01A0024)
-#define STATUS_LOG_CLIENT_NOT_REGISTERED __constant_cpu_to_le32(0xC01A0025)
-#define STATUS_LOG_FULL_HANDLER_IN_PROGRESS __constant_cpu_to_le32(0xC01A0026)
-#define STATUS_LOG_CONTAINER_READ_FAILED __constant_cpu_to_le32(0xC01A0027)
-#define STATUS_LOG_CONTAINER_WRITE_FAILED __constant_cpu_to_le32(0xC01A0028)
-#define STATUS_LOG_CONTAINER_OPEN_FAILED __constant_cpu_to_le32(0xC01A0029)
-#define STATUS_LOG_CONTAINER_STATE_INVALID __constant_cpu_to_le32(0xC01A002A)
-#define STATUS_LOG_STATE_INVALID __constant_cpu_to_le32(0xC01A002B)
-#define STATUS_LOG_PINNED __constant_cpu_to_le32(0xC01A002C)
-#define STATUS_LOG_METADATA_FLUSH_FAILED __constant_cpu_to_le32(0xC01A002D)
-#define STATUS_LOG_INCONSISTENT_SECURITY __constant_cpu_to_le32(0xC01A002E)
-#define STATUS_LOG_APPENDED_FLUSH_FAILED __constant_cpu_to_le32(0xC01A002F)
-#define STATUS_LOG_PINNED_RESERVATION __constant_cpu_to_le32(0xC01A0030)
-#define STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD __constant_cpu_to_le32(0xC01B00EA)
-#define STATUS_FLT_NO_HANDLER_DEFINED __constant_cpu_to_le32(0xC01C0001)
-#define STATUS_FLT_CONTEXT_ALREADY_DEFINED __constant_cpu_to_le32(0xC01C0002)
-#define STATUS_FLT_INVALID_ASYNCHRONOUS_REQUEST __constant_cpu_to_le32(0xC01C0003)
-#define STATUS_FLT_DISALLOW_FAST_IO __constant_cpu_to_le32(0xC01C0004)
-#define STATUS_FLT_INVALID_NAME_REQUEST __constant_cpu_to_le32(0xC01C0005)
-#define STATUS_FLT_NOT_SAFE_TO_POST_OPERATION __constant_cpu_to_le32(0xC01C0006)
-#define STATUS_FLT_NOT_INITIALIZED __constant_cpu_to_le32(0xC01C0007)
-#define STATUS_FLT_FILTER_NOT_READY __constant_cpu_to_le32(0xC01C0008)
-#define STATUS_FLT_POST_OPERATION_CLEANUP __constant_cpu_to_le32(0xC01C0009)
-#define STATUS_FLT_INTERNAL_ERROR __constant_cpu_to_le32(0xC01C000A)
-#define STATUS_FLT_DELETING_OBJECT __constant_cpu_to_le32(0xC01C000B)
-#define STATUS_FLT_MUST_BE_NONPAGED_POOL __constant_cpu_to_le32(0xC01C000C)
-#define STATUS_FLT_DUPLICATE_ENTRY __constant_cpu_to_le32(0xC01C000D)
-#define STATUS_FLT_CBDQ_DISABLED __constant_cpu_to_le32(0xC01C000E)
-#define STATUS_FLT_DO_NOT_ATTACH __constant_cpu_to_le32(0xC01C000F)
-#define STATUS_FLT_DO_NOT_DETACH __constant_cpu_to_le32(0xC01C0010)
-#define STATUS_FLT_INSTANCE_ALTITUDE_COLLISION __constant_cpu_to_le32(0xC01C0011)
-#define STATUS_FLT_INSTANCE_NAME_COLLISION __constant_cpu_to_le32(0xC01C0012)
-#define STATUS_FLT_FILTER_NOT_FOUND __constant_cpu_to_le32(0xC01C0013)
-#define STATUS_FLT_VOLUME_NOT_FOUND __constant_cpu_to_le32(0xC01C0014)
-#define STATUS_FLT_INSTANCE_NOT_FOUND __constant_cpu_to_le32(0xC01C0015)
-#define STATUS_FLT_CONTEXT_ALLOCATION_NOT_FOUND __constant_cpu_to_le32(0xC01C0016)
-#define STATUS_FLT_INVALID_CONTEXT_REGISTRATION __constant_cpu_to_le32(0xC01C0017)
-#define STATUS_FLT_NAME_CACHE_MISS __constant_cpu_to_le32(0xC01C0018)
-#define STATUS_FLT_NO_DEVICE_OBJECT __constant_cpu_to_le32(0xC01C0019)
-#define STATUS_FLT_VOLUME_ALREADY_MOUNTED __constant_cpu_to_le32(0xC01C001A)
-#define STATUS_FLT_ALREADY_ENLISTED __constant_cpu_to_le32(0xC01C001B)
-#define STATUS_FLT_CONTEXT_ALREADY_LINKED __constant_cpu_to_le32(0xC01C001C)
-#define STATUS_FLT_NO_WAITER_FOR_REPLY __constant_cpu_to_le32(0xC01C0020)
-#define STATUS_MONITOR_NO_DESCRIPTOR __constant_cpu_to_le32(0xC01D0001)
-#define STATUS_MONITOR_UNKNOWN_DESCRIPTOR_FORMAT __constant_cpu_to_le32(0xC01D0002)
-#define STATUS_MONITOR_INVALID_DESCRIPTOR_CHECKSUM __constant_cpu_to_le32(0xC01D0003)
-#define STATUS_MONITOR_INVALID_STANDARD_TIMING_BLOCK __constant_cpu_to_le32(0xC01D0004)
-#define STATUS_MONITOR_WMI_DATABLOCK_REGISTRATION_FAILED __constant_cpu_to_le32(0xC01D0005)
-#define STATUS_MONITOR_INVALID_SERIAL_NUMBER_MONDSC_BLOCK __constant_cpu_to_le32(0xC01D0006)
-#define STATUS_MONITOR_INVALID_USER_FRIENDLY_MONDSC_BLOCK __constant_cpu_to_le32(0xC01D0007)
-#define STATUS_MONITOR_NO_MORE_DESCRIPTOR_DATA __constant_cpu_to_le32(0xC01D0008)
-#define STATUS_MONITOR_INVALID_DETAILED_TIMING_BLOCK __constant_cpu_to_le32(0xC01D0009)
-#define STATUS_GRAPHICS_NOT_EXCLUSIVE_MODE_OWNER __constant_cpu_to_le32(0xC01E0000)
-#define STATUS_GRAPHICS_INSUFFICIENT_DMA_BUFFER __constant_cpu_to_le32(0xC01E0001)
-#define STATUS_GRAPHICS_INVALID_DISPLAY_ADAPTER __constant_cpu_to_le32(0xC01E0002)
-#define STATUS_GRAPHICS_ADAPTER_WAS_RESET __constant_cpu_to_le32(0xC01E0003)
-#define STATUS_GRAPHICS_INVALID_DRIVER_MODEL __constant_cpu_to_le32(0xC01E0004)
-#define STATUS_GRAPHICS_PRESENT_MODE_CHANGED __constant_cpu_to_le32(0xC01E0005)
-#define STATUS_GRAPHICS_PRESENT_OCCLUDED __constant_cpu_to_le32(0xC01E0006)
-#define STATUS_GRAPHICS_PRESENT_DENIED __constant_cpu_to_le32(0xC01E0007)
-#define STATUS_GRAPHICS_CANNOTCOLORCONVERT __constant_cpu_to_le32(0xC01E0008)
-#define STATUS_GRAPHICS_NO_VIDEO_MEMORY __constant_cpu_to_le32(0xC01E0100)
-#define STATUS_GRAPHICS_CANT_LOCK_MEMORY __constant_cpu_to_le32(0xC01E0101)
-#define STATUS_GRAPHICS_ALLOCATION_BUSY __constant_cpu_to_le32(0xC01E0102)
-#define STATUS_GRAPHICS_TOO_MANY_REFERENCES __constant_cpu_to_le32(0xC01E0103)
-#define STATUS_GRAPHICS_TRY_AGAIN_LATER __constant_cpu_to_le32(0xC01E0104)
-#define STATUS_GRAPHICS_TRY_AGAIN_NOW __constant_cpu_to_le32(0xC01E0105)
-#define STATUS_GRAPHICS_ALLOCATION_INVALID __constant_cpu_to_le32(0xC01E0106)
-#define STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNAVAILABLE __constant_cpu_to_le32(0xC01E0107)
-#define STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNSUPPORTED __constant_cpu_to_le32(0xC01E0108)
-#define STATUS_GRAPHICS_CANT_EVICT_PINNED_ALLOCATION __constant_cpu_to_le32(0xC01E0109)
-#define STATUS_GRAPHICS_INVALID_ALLOCATION_USAGE __constant_cpu_to_le32(0xC01E0110)
-#define STATUS_GRAPHICS_CANT_RENDER_LOCKED_ALLOCATION __constant_cpu_to_le32(0xC01E0111)
-#define STATUS_GRAPHICS_ALLOCATION_CLOSED __constant_cpu_to_le32(0xC01E0112)
-#define STATUS_GRAPHICS_INVALID_ALLOCATION_INSTANCE __constant_cpu_to_le32(0xC01E0113)
-#define STATUS_GRAPHICS_INVALID_ALLOCATION_HANDLE __constant_cpu_to_le32(0xC01E0114)
-#define STATUS_GRAPHICS_WRONG_ALLOCATION_DEVICE __constant_cpu_to_le32(0xC01E0115)
-#define STATUS_GRAPHICS_ALLOCATION_CONTENT_LOST __constant_cpu_to_le32(0xC01E0116)
-#define STATUS_GRAPHICS_GPU_EXCEPTION_ON_DEVICE __constant_cpu_to_le32(0xC01E0200)
-#define STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY __constant_cpu_to_le32(0xC01E0300)
-#define STATUS_GRAPHICS_VIDPN_TOPOLOGY_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0301)
-#define STATUS_GRAPHICS_VIDPN_TOPOLOGY_CURRENTLY_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0302)
-#define STATUS_GRAPHICS_INVALID_VIDPN __constant_cpu_to_le32(0xC01E0303)
-#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE __constant_cpu_to_le32(0xC01E0304)
-#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET __constant_cpu_to_le32(0xC01E0305)
-#define STATUS_GRAPHICS_VIDPN_MODALITY_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0306)
-#define STATUS_GRAPHICS_INVALID_VIDPN_SOURCEMODESET __constant_cpu_to_le32(0xC01E0308)
-#define STATUS_GRAPHICS_INVALID_VIDPN_TARGETMODESET __constant_cpu_to_le32(0xC01E0309)
-#define STATUS_GRAPHICS_INVALID_FREQUENCY __constant_cpu_to_le32(0xC01E030A)
-#define STATUS_GRAPHICS_INVALID_ACTIVE_REGION __constant_cpu_to_le32(0xC01E030B)
-#define STATUS_GRAPHICS_INVALID_TOTAL_REGION __constant_cpu_to_le32(0xC01E030C)
-#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE_MODE __constant_cpu_to_le32(0xC01E0310)
-#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET_MODE __constant_cpu_to_le32(0xC01E0311)
-#define STATUS_GRAPHICS_PINNED_MODE_MUST_REMAIN_IN_SET __constant_cpu_to_le32(0xC01E0312)
-#define STATUS_GRAPHICS_PATH_ALREADY_IN_TOPOLOGY __constant_cpu_to_le32(0xC01E0313)
-#define STATUS_GRAPHICS_MODE_ALREADY_IN_MODESET __constant_cpu_to_le32(0xC01E0314)
-#define STATUS_GRAPHICS_INVALID_VIDEOPRESENTSOURCESET __constant_cpu_to_le32(0xC01E0315)
-#define STATUS_GRAPHICS_INVALID_VIDEOPRESENTTARGETSET __constant_cpu_to_le32(0xC01E0316)
-#define STATUS_GRAPHICS_SOURCE_ALREADY_IN_SET __constant_cpu_to_le32(0xC01E0317)
-#define STATUS_GRAPHICS_TARGET_ALREADY_IN_SET __constant_cpu_to_le32(0xC01E0318)
-#define STATUS_GRAPHICS_INVALID_VIDPN_PRESENT_PATH __constant_cpu_to_le32(0xC01E0319)
-#define STATUS_GRAPHICS_NO_RECOMMENDED_VIDPN_TOPOLOGY __constant_cpu_to_le32(0xC01E031A)
-#define STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGESET __constant_cpu_to_le32(0xC01E031B)
-#define STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE __constant_cpu_to_le32(0xC01E031C)
-#define STATUS_GRAPHICS_FREQUENCYRANGE_NOT_IN_SET __constant_cpu_to_le32(0xC01E031D)
-#define STATUS_GRAPHICS_FREQUENCYRANGE_ALREADY_IN_SET __constant_cpu_to_le32(0xC01E031F)
-#define STATUS_GRAPHICS_STALE_MODESET __constant_cpu_to_le32(0xC01E0320)
-#define STATUS_GRAPHICS_INVALID_MONITOR_SOURCEMODESET __constant_cpu_to_le32(0xC01E0321)
-#define STATUS_GRAPHICS_INVALID_MONITOR_SOURCE_MODE __constant_cpu_to_le32(0xC01E0322)
-#define STATUS_GRAPHICS_NO_RECOMMENDED_FUNCTIONAL_VIDPN __constant_cpu_to_le32(0xC01E0323)
-#define STATUS_GRAPHICS_MODE_ID_MUST_BE_UNIQUE __constant_cpu_to_le32(0xC01E0324)
-#define STATUS_GRAPHICS_EMPTY_ADAPTER_MONITOR_MODE_SUPPORT_INTERSECTION __constant_cpu_to_le32(0xC01E0325)
-#define STATUS_GRAPHICS_VIDEO_PRESENT_TARGETS_LESS_THAN_SOURCES __constant_cpu_to_le32(0xC01E0326)
-#define STATUS_GRAPHICS_PATH_NOT_IN_TOPOLOGY __constant_cpu_to_le32(0xC01E0327)
-#define STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_SOURCE __constant_cpu_to_le32(0xC01E0328)
-#define STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_TARGET __constant_cpu_to_le32(0xC01E0329)
-#define STATUS_GRAPHICS_INVALID_MONITORDESCRIPTORSET __constant_cpu_to_le32(0xC01E032A)
-#define STATUS_GRAPHICS_INVALID_MONITORDESCRIPTOR __constant_cpu_to_le32(0xC01E032B)
-#define STATUS_GRAPHICS_MONITORDESCRIPTOR_NOT_IN_SET __constant_cpu_to_le32(0xC01E032C)
-#define STATUS_GRAPHICS_MONITORDESCRIPTOR_ALREADY_IN_SET __constant_cpu_to_le32(0xC01E032D)
-#define STATUS_GRAPHICS_MONITORDESCRIPTOR_ID_MUST_BE_UNIQUE __constant_cpu_to_le32(0xC01E032E)
-#define STATUS_GRAPHICS_INVALID_VIDPN_TARGET_SUBSET_TYPE __constant_cpu_to_le32(0xC01E032F)
-#define STATUS_GRAPHICS_RESOURCES_NOT_RELATED __constant_cpu_to_le32(0xC01E0330)
-#define STATUS_GRAPHICS_SOURCE_ID_MUST_BE_UNIQUE __constant_cpu_to_le32(0xC01E0331)
-#define STATUS_GRAPHICS_TARGET_ID_MUST_BE_UNIQUE __constant_cpu_to_le32(0xC01E0332)
-#define STATUS_GRAPHICS_NO_AVAILABLE_VIDPN_TARGET __constant_cpu_to_le32(0xC01E0333)
-#define STATUS_GRAPHICS_MONITOR_COULD_NOT_BE_ASSOCIATED_WITH_ADAPTER __constant_cpu_to_le32(0xC01E0334)
-#define STATUS_GRAPHICS_NO_VIDPNMGR __constant_cpu_to_le32(0xC01E0335)
-#define STATUS_GRAPHICS_NO_ACTIVE_VIDPN __constant_cpu_to_le32(0xC01E0336)
-#define STATUS_GRAPHICS_STALE_VIDPN_TOPOLOGY __constant_cpu_to_le32(0xC01E0337)
-#define STATUS_GRAPHICS_MONITOR_NOT_CONNECTED __constant_cpu_to_le32(0xC01E0338)
-#define STATUS_GRAPHICS_SOURCE_NOT_IN_TOPOLOGY __constant_cpu_to_le32(0xC01E0339)
-#define STATUS_GRAPHICS_INVALID_PRIMARYSURFACE_SIZE __constant_cpu_to_le32(0xC01E033A)
-#define STATUS_GRAPHICS_INVALID_VISIBLEREGION_SIZE __constant_cpu_to_le32(0xC01E033B)
-#define STATUS_GRAPHICS_INVALID_STRIDE __constant_cpu_to_le32(0xC01E033C)
-#define STATUS_GRAPHICS_INVALID_PIXELFORMAT __constant_cpu_to_le32(0xC01E033D)
-#define STATUS_GRAPHICS_INVALID_COLORBASIS __constant_cpu_to_le32(0xC01E033E)
-#define STATUS_GRAPHICS_INVALID_PIXELVALUEACCESSMODE __constant_cpu_to_le32(0xC01E033F)
-#define STATUS_GRAPHICS_TARGET_NOT_IN_TOPOLOGY __constant_cpu_to_le32(0xC01E0340)
-#define STATUS_GRAPHICS_NO_DISPLAY_MODE_MANAGEMENT_SUPPORT __constant_cpu_to_le32(0xC01E0341)
-#define STATUS_GRAPHICS_VIDPN_SOURCE_IN_USE __constant_cpu_to_le32(0xC01E0342)
-#define STATUS_GRAPHICS_CANT_ACCESS_ACTIVE_VIDPN __constant_cpu_to_le32(0xC01E0343)
-#define STATUS_GRAPHICS_INVALID_PATH_IMPORTANCE_ORDINAL __constant_cpu_to_le32(0xC01E0344)
-#define STATUS_GRAPHICS_INVALID_PATH_CONTENT_GEOMETRY_TRANSFORMATION __constant_cpu_to_le32(0xC01E0345)
-#define STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0346)
-#define STATUS_GRAPHICS_INVALID_GAMMA_RAMP __constant_cpu_to_le32(0xC01E0347)
-#define STATUS_GRAPHICS_GAMMA_RAMP_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0348)
-#define STATUS_GRAPHICS_MULTISAMPLING_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0349)
-#define STATUS_GRAPHICS_MODE_NOT_IN_MODESET __constant_cpu_to_le32(0xC01E034A)
-#define STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY_RECOMMENDATION_REASON __constant_cpu_to_le32(0xC01E034D)
-#define STATUS_GRAPHICS_INVALID_PATH_CONTENT_TYPE __constant_cpu_to_le32(0xC01E034E)
-#define STATUS_GRAPHICS_INVALID_COPYPROTECTION_TYPE __constant_cpu_to_le32(0xC01E034F)
-#define STATUS_GRAPHICS_UNASSIGNED_MODESET_ALREADY_EXISTS __constant_cpu_to_le32(0xC01E0350)
-#define STATUS_GRAPHICS_INVALID_SCANLINE_ORDERING __constant_cpu_to_le32(0xC01E0352)
-#define STATUS_GRAPHICS_TOPOLOGY_CHANGES_NOT_ALLOWED __constant_cpu_to_le32(0xC01E0353)
-#define STATUS_GRAPHICS_NO_AVAILABLE_IMPORTANCE_ORDINALS __constant_cpu_to_le32(0xC01E0354)
-#define STATUS_GRAPHICS_INCOMPATIBLE_PRIVATE_FORMAT __constant_cpu_to_le32(0xC01E0355)
-#define STATUS_GRAPHICS_INVALID_MODE_PRUNING_ALGORITHM __constant_cpu_to_le32(0xC01E0356)
-#define STATUS_GRAPHICS_INVALID_MONITOR_CAPABILITY_ORIGIN __constant_cpu_to_le32(0xC01E0357)
-#define STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE_CONSTRAINT __constant_cpu_to_le32(0xC01E0358)
-#define STATUS_GRAPHICS_MAX_NUM_PATHS_REACHED __constant_cpu_to_le32(0xC01E0359)
-#define STATUS_GRAPHICS_CANCEL_VIDPN_TOPOLOGY_AUGMENTATION __constant_cpu_to_le32(0xC01E035A)
-#define STATUS_GRAPHICS_INVALID_CLIENT_TYPE __constant_cpu_to_le32(0xC01E035B)
-#define STATUS_GRAPHICS_CLIENTVIDPN_NOT_SET __constant_cpu_to_le32(0xC01E035C)
-#define STATUS_GRAPHICS_SPECIFIED_CHILD_ALREADY_CONNECTED __constant_cpu_to_le32(0xC01E0400)
-#define STATUS_GRAPHICS_CHILD_DESCRIPTOR_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0401)
-#define STATUS_GRAPHICS_NOT_A_LINKED_ADAPTER __constant_cpu_to_le32(0xC01E0430)
-#define STATUS_GRAPHICS_LEADLINK_NOT_ENUMERATED __constant_cpu_to_le32(0xC01E0431)
-#define STATUS_GRAPHICS_CHAINLINKS_NOT_ENUMERATED __constant_cpu_to_le32(0xC01E0432)
-#define STATUS_GRAPHICS_ADAPTER_CHAIN_NOT_READY __constant_cpu_to_le32(0xC01E0433)
-#define STATUS_GRAPHICS_CHAINLINKS_NOT_STARTED __constant_cpu_to_le32(0xC01E0434)
-#define STATUS_GRAPHICS_CHAINLINKS_NOT_POWERED_ON __constant_cpu_to_le32(0xC01E0435)
-#define STATUS_GRAPHICS_INCONSISTENT_DEVICE_LINK_STATE __constant_cpu_to_le32(0xC01E0436)
-#define STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER __constant_cpu_to_le32(0xC01E0438)
-#define STATUS_GRAPHICS_ADAPTER_ACCESS_NOT_EXCLUDED __constant_cpu_to_le32(0xC01E043B)
-#define STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_COPP_SEMANTICS __constant_cpu_to_le32(0xC01E051C)
-#define STATUS_GRAPHICS_OPM_INVALID_INFORMATION_REQUEST __constant_cpu_to_le32(0xC01E051D)
-#define STATUS_GRAPHICS_OPM_DRIVER_INTERNAL_ERROR __constant_cpu_to_le32(0xC01E051E)
-#define STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_OPM_SEMANTICS __constant_cpu_to_le32(0xC01E051F)
-#define STATUS_GRAPHICS_OPM_SIGNALING_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0520)
-#define STATUS_GRAPHICS_OPM_INVALID_CONFIGURATION_REQUEST __constant_cpu_to_le32(0xC01E0521)
-#define STATUS_GRAPHICS_OPM_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0500)
-#define STATUS_GRAPHICS_COPP_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0501)
-#define STATUS_GRAPHICS_UAB_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0502)
-#define STATUS_GRAPHICS_OPM_INVALID_ENCRYPTED_PARAMETERS __constant_cpu_to_le32(0xC01E0503)
-#define STATUS_GRAPHICS_OPM_PARAMETER_ARRAY_TOO_SMALL __constant_cpu_to_le32(0xC01E0504)
-#define STATUS_GRAPHICS_OPM_NO_PROTECTED_OUTPUTS_EXIST __constant_cpu_to_le32(0xC01E0505)
-#define STATUS_GRAPHICS_PVP_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME __constant_cpu_to_le32(0xC01E0506)
-#define STATUS_GRAPHICS_PVP_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP __constant_cpu_to_le32(0xC01E0507)
-#define STATUS_GRAPHICS_PVP_MIRRORING_DEVICES_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0508)
-#define STATUS_GRAPHICS_OPM_INVALID_POINTER __constant_cpu_to_le32(0xC01E050A)
-#define STATUS_GRAPHICS_OPM_INTERNAL_ERROR __constant_cpu_to_le32(0xC01E050B)
-#define STATUS_GRAPHICS_OPM_INVALID_HANDLE __constant_cpu_to_le32(0xC01E050C)
-#define STATUS_GRAPHICS_PVP_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE __constant_cpu_to_le32(0xC01E050D)
-#define STATUS_GRAPHICS_PVP_INVALID_CERTIFICATE_LENGTH __constant_cpu_to_le32(0xC01E050E)
-#define STATUS_GRAPHICS_OPM_SPANNING_MODE_ENABLED __constant_cpu_to_le32(0xC01E050F)
-#define STATUS_GRAPHICS_OPM_THEATER_MODE_ENABLED __constant_cpu_to_le32(0xC01E0510)
-#define STATUS_GRAPHICS_PVP_HFS_FAILED __constant_cpu_to_le32(0xC01E0511)
-#define STATUS_GRAPHICS_OPM_INVALID_SRM __constant_cpu_to_le32(0xC01E0512)
-#define STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_HDCP __constant_cpu_to_le32(0xC01E0513)
-#define STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_ACP __constant_cpu_to_le32(0xC01E0514)
-#define STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_CGMSA __constant_cpu_to_le32(0xC01E0515)
-#define STATUS_GRAPHICS_OPM_HDCP_SRM_NEVER_SET __constant_cpu_to_le32(0xC01E0516)
-#define STATUS_GRAPHICS_OPM_RESOLUTION_TOO_HIGH __constant_cpu_to_le32(0xC01E0517)
-#define STATUS_GRAPHICS_OPM_ALL_HDCP_HARDWARE_ALREADY_IN_USE __constant_cpu_to_le32(0xC01E0518)
-#define STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_NO_LONGER_EXISTS __constant_cpu_to_le32(0xC01E051A)
-#define STATUS_GRAPHICS_OPM_SESSION_TYPE_CHANGE_IN_PROGRESS __constant_cpu_to_le32(0xC01E051B)
-#define STATUS_GRAPHICS_I2C_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0580)
-#define STATUS_GRAPHICS_I2C_DEVICE_DOES_NOT_EXIST __constant_cpu_to_le32(0xC01E0581)
-#define STATUS_GRAPHICS_I2C_ERROR_TRANSMITTING_DATA __constant_cpu_to_le32(0xC01E0582)
-#define STATUS_GRAPHICS_I2C_ERROR_RECEIVING_DATA __constant_cpu_to_le32(0xC01E0583)
-#define STATUS_GRAPHICS_DDCCI_VCP_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E0584)
-#define STATUS_GRAPHICS_DDCCI_INVALID_DATA __constant_cpu_to_le32(0xC01E0585)
-#define STATUS_GRAPHICS_DDCCI_MONITOR_RETURNED_INVALID_TIMING_STATUS_BYTE __constant_cpu_to_le32(0xC01E0586)
-#define STATUS_GRAPHICS_DDCCI_INVALID_CAPABILITIES_STRING __constant_cpu_to_le32(0xC01E0587)
-#define STATUS_GRAPHICS_MCA_INTERNAL_ERROR __constant_cpu_to_le32(0xC01E0588)
-#define STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_COMMAND __constant_cpu_to_le32(0xC01E0589)
-#define STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_LENGTH __constant_cpu_to_le32(0xC01E058A)
-#define STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_CHECKSUM __constant_cpu_to_le32(0xC01E058B)
-#define STATUS_GRAPHICS_INVALID_PHYSICAL_MONITOR_HANDLE __constant_cpu_to_le32(0xC01E058C)
-#define STATUS_GRAPHICS_MONITOR_NO_LONGER_EXISTS __constant_cpu_to_le32(0xC01E058D)
-#define STATUS_GRAPHICS_ONLY_CONSOLE_SESSION_SUPPORTED __constant_cpu_to_le32(0xC01E05E0)
-#define STATUS_GRAPHICS_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME __constant_cpu_to_le32(0xC01E05E1)
-#define STATUS_GRAPHICS_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP __constant_cpu_to_le32(0xC01E05E2)
-#define STATUS_GRAPHICS_MIRRORING_DEVICES_NOT_SUPPORTED __constant_cpu_to_le32(0xC01E05E3)
-#define STATUS_GRAPHICS_INVALID_POINTER __constant_cpu_to_le32(0xC01E05E4)
-#define STATUS_GRAPHICS_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE __constant_cpu_to_le32(0xC01E05E5)
-#define STATUS_GRAPHICS_PARAMETER_ARRAY_TOO_SMALL __constant_cpu_to_le32(0xC01E05E6)
-#define STATUS_GRAPHICS_INTERNAL_ERROR __constant_cpu_to_le32(0xC01E05E7)
-#define STATUS_GRAPHICS_SESSION_TYPE_CHANGE_IN_PROGRESS __constant_cpu_to_le32(0xC01E05E8)
-#define STATUS_FVE_LOCKED_VOLUME __constant_cpu_to_le32(0xC0210000)
-#define STATUS_FVE_NOT_ENCRYPTED __constant_cpu_to_le32(0xC0210001)
-#define STATUS_FVE_BAD_INFORMATION __constant_cpu_to_le32(0xC0210002)
-#define STATUS_FVE_TOO_SMALL __constant_cpu_to_le32(0xC0210003)
-#define STATUS_FVE_FAILED_WRONG_FS __constant_cpu_to_le32(0xC0210004)
-#define STATUS_FVE_FAILED_BAD_FS __constant_cpu_to_le32(0xC0210005)
-#define STATUS_FVE_FS_NOT_EXTENDED __constant_cpu_to_le32(0xC0210006)
-#define STATUS_FVE_FS_MOUNTED __constant_cpu_to_le32(0xC0210007)
-#define STATUS_FVE_NO_LICENSE __constant_cpu_to_le32(0xC0210008)
-#define STATUS_FVE_ACTION_NOT_ALLOWED __constant_cpu_to_le32(0xC0210009)
-#define STATUS_FVE_BAD_DATA __constant_cpu_to_le32(0xC021000A)
-#define STATUS_FVE_VOLUME_NOT_BOUND __constant_cpu_to_le32(0xC021000B)
-#define STATUS_FVE_NOT_DATA_VOLUME __constant_cpu_to_le32(0xC021000C)
-#define STATUS_FVE_CONV_READ_ERROR __constant_cpu_to_le32(0xC021000D)
-#define STATUS_FVE_CONV_WRITE_ERROR __constant_cpu_to_le32(0xC021000E)
-#define STATUS_FVE_OVERLAPPED_UPDATE __constant_cpu_to_le32(0xC021000F)
-#define STATUS_FVE_FAILED_SECTOR_SIZE __constant_cpu_to_le32(0xC0210010)
-#define STATUS_FVE_FAILED_AUTHENTICATION __constant_cpu_to_le32(0xC0210011)
-#define STATUS_FVE_NOT_OS_VOLUME __constant_cpu_to_le32(0xC0210012)
-#define STATUS_FVE_KEYFILE_NOT_FOUND __constant_cpu_to_le32(0xC0210013)
-#define STATUS_FVE_KEYFILE_INVALID __constant_cpu_to_le32(0xC0210014)
-#define STATUS_FVE_KEYFILE_NO_VMK __constant_cpu_to_le32(0xC0210015)
-#define STATUS_FVE_TPM_DISABLED __constant_cpu_to_le32(0xC0210016)
-#define STATUS_FVE_TPM_SRK_AUTH_NOT_ZERO __constant_cpu_to_le32(0xC0210017)
-#define STATUS_FVE_TPM_INVALID_PCR __constant_cpu_to_le32(0xC0210018)
-#define STATUS_FVE_TPM_NO_VMK __constant_cpu_to_le32(0xC0210019)
-#define STATUS_FVE_PIN_INVALID __constant_cpu_to_le32(0xC021001A)
-#define STATUS_FVE_AUTH_INVALID_APPLICATION __constant_cpu_to_le32(0xC021001B)
-#define STATUS_FVE_AUTH_INVALID_CONFIG __constant_cpu_to_le32(0xC021001C)
-#define STATUS_FVE_DEBUGGER_ENABLED __constant_cpu_to_le32(0xC021001D)
-#define STATUS_FVE_DRY_RUN_FAILED __constant_cpu_to_le32(0xC021001E)
-#define STATUS_FVE_BAD_METADATA_POINTER __constant_cpu_to_le32(0xC021001F)
-#define STATUS_FVE_OLD_METADATA_COPY __constant_cpu_to_le32(0xC0210020)
-#define STATUS_FVE_REBOOT_REQUIRED __constant_cpu_to_le32(0xC0210021)
-#define STATUS_FVE_RAW_ACCESS __constant_cpu_to_le32(0xC0210022)
-#define STATUS_FVE_RAW_BLOCKED __constant_cpu_to_le32(0xC0210023)
-#define STATUS_FWP_CALLOUT_NOT_FOUND __constant_cpu_to_le32(0xC0220001)
-#define STATUS_FWP_CONDITION_NOT_FOUND __constant_cpu_to_le32(0xC0220002)
-#define STATUS_FWP_FILTER_NOT_FOUND __constant_cpu_to_le32(0xC0220003)
-#define STATUS_FWP_LAYER_NOT_FOUND __constant_cpu_to_le32(0xC0220004)
-#define STATUS_FWP_PROVIDER_NOT_FOUND __constant_cpu_to_le32(0xC0220005)
-#define STATUS_FWP_PROVIDER_CONTEXT_NOT_FOUND __constant_cpu_to_le32(0xC0220006)
-#define STATUS_FWP_SUBLAYER_NOT_FOUND __constant_cpu_to_le32(0xC0220007)
-#define STATUS_FWP_NOT_FOUND __constant_cpu_to_le32(0xC0220008)
-#define STATUS_FWP_ALREADY_EXISTS __constant_cpu_to_le32(0xC0220009)
-#define STATUS_FWP_IN_USE __constant_cpu_to_le32(0xC022000A)
-#define STATUS_FWP_DYNAMIC_SESSION_IN_PROGRESS __constant_cpu_to_le32(0xC022000B)
-#define STATUS_FWP_WRONG_SESSION __constant_cpu_to_le32(0xC022000C)
-#define STATUS_FWP_NO_TXN_IN_PROGRESS __constant_cpu_to_le32(0xC022000D)
-#define STATUS_FWP_TXN_IN_PROGRESS __constant_cpu_to_le32(0xC022000E)
-#define STATUS_FWP_TXN_ABORTED __constant_cpu_to_le32(0xC022000F)
-#define STATUS_FWP_SESSION_ABORTED __constant_cpu_to_le32(0xC0220010)
-#define STATUS_FWP_INCOMPATIBLE_TXN __constant_cpu_to_le32(0xC0220011)
-#define STATUS_FWP_TIMEOUT __constant_cpu_to_le32(0xC0220012)
-#define STATUS_FWP_NET_EVENTS_DISABLED __constant_cpu_to_le32(0xC0220013)
-#define STATUS_FWP_INCOMPATIBLE_LAYER __constant_cpu_to_le32(0xC0220014)
-#define STATUS_FWP_KM_CLIENTS_ONLY __constant_cpu_to_le32(0xC0220015)
-#define STATUS_FWP_LIFETIME_MISMATCH __constant_cpu_to_le32(0xC0220016)
-#define STATUS_FWP_BUILTIN_OBJECT __constant_cpu_to_le32(0xC0220017)
-#define STATUS_FWP_TOO_MANY_BOOTTIME_FILTERS __constant_cpu_to_le32(0xC0220018)
-#define STATUS_FWP_TOO_MANY_CALLOUTS __constant_cpu_to_le32(0xC0220018)
-#define STATUS_FWP_NOTIFICATION_DROPPED __constant_cpu_to_le32(0xC0220019)
-#define STATUS_FWP_TRAFFIC_MISMATCH __constant_cpu_to_le32(0xC022001A)
-#define STATUS_FWP_INCOMPATIBLE_SA_STATE __constant_cpu_to_le32(0xC022001B)
-#define STATUS_FWP_NULL_POINTER __constant_cpu_to_le32(0xC022001C)
-#define STATUS_FWP_INVALID_ENUMERATOR __constant_cpu_to_le32(0xC022001D)
-#define STATUS_FWP_INVALID_FLAGS __constant_cpu_to_le32(0xC022001E)
-#define STATUS_FWP_INVALID_NET_MASK __constant_cpu_to_le32(0xC022001F)
-#define STATUS_FWP_INVALID_RANGE __constant_cpu_to_le32(0xC0220020)
-#define STATUS_FWP_INVALID_INTERVAL __constant_cpu_to_le32(0xC0220021)
-#define STATUS_FWP_ZERO_LENGTH_ARRAY __constant_cpu_to_le32(0xC0220022)
-#define STATUS_FWP_NULL_DISPLAY_NAME __constant_cpu_to_le32(0xC0220023)
-#define STATUS_FWP_INVALID_ACTION_TYPE __constant_cpu_to_le32(0xC0220024)
-#define STATUS_FWP_INVALID_WEIGHT __constant_cpu_to_le32(0xC0220025)
-#define STATUS_FWP_MATCH_TYPE_MISMATCH __constant_cpu_to_le32(0xC0220026)
-#define STATUS_FWP_TYPE_MISMATCH __constant_cpu_to_le32(0xC0220027)
-#define STATUS_FWP_OUT_OF_BOUNDS __constant_cpu_to_le32(0xC0220028)
-#define STATUS_FWP_RESERVED __constant_cpu_to_le32(0xC0220029)
-#define STATUS_FWP_DUPLICATE_CONDITION __constant_cpu_to_le32(0xC022002A)
-#define STATUS_FWP_DUPLICATE_KEYMOD __constant_cpu_to_le32(0xC022002B)
-#define STATUS_FWP_ACTION_INCOMPATIBLE_WITH_LAYER __constant_cpu_to_le32(0xC022002C)
-#define STATUS_FWP_ACTION_INCOMPATIBLE_WITH_SUBLAYER __constant_cpu_to_le32(0xC022002D)
-#define STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_LAYER __constant_cpu_to_le32(0xC022002E)
-#define STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_CALLOUT __constant_cpu_to_le32(0xC022002F)
-#define STATUS_FWP_INCOMPATIBLE_AUTH_METHOD __constant_cpu_to_le32(0xC0220030)
-#define STATUS_FWP_INCOMPATIBLE_DH_GROUP __constant_cpu_to_le32(0xC0220031)
-#define STATUS_FWP_EM_NOT_SUPPORTED __constant_cpu_to_le32(0xC0220032)
-#define STATUS_FWP_NEVER_MATCH __constant_cpu_to_le32(0xC0220033)
-#define STATUS_FWP_PROVIDER_CONTEXT_MISMATCH __constant_cpu_to_le32(0xC0220034)
-#define STATUS_FWP_INVALID_PARAMETER __constant_cpu_to_le32(0xC0220035)
-#define STATUS_FWP_TOO_MANY_SUBLAYERS __constant_cpu_to_le32(0xC0220036)
-#define STATUS_FWP_CALLOUT_NOTIFICATION_FAILED __constant_cpu_to_le32(0xC0220037)
-#define STATUS_FWP_INCOMPATIBLE_AUTH_CONFIG __constant_cpu_to_le32(0xC0220038)
-#define STATUS_FWP_INCOMPATIBLE_CIPHER_CONFIG __constant_cpu_to_le32(0xC0220039)
-#define STATUS_FWP_TCPIP_NOT_READY __constant_cpu_to_le32(0xC0220100)
-#define STATUS_FWP_INJECT_HANDLE_CLOSING __constant_cpu_to_le32(0xC0220101)
-#define STATUS_FWP_INJECT_HANDLE_STALE __constant_cpu_to_le32(0xC0220102)
-#define STATUS_FWP_CANNOT_PEND __constant_cpu_to_le32(0xC0220103)
-#define STATUS_NDIS_CLOSING __constant_cpu_to_le32(0xC0230002)
-#define STATUS_NDIS_BAD_VERSION __constant_cpu_to_le32(0xC0230004)
-#define STATUS_NDIS_BAD_CHARACTERISTICS __constant_cpu_to_le32(0xC0230005)
-#define STATUS_NDIS_ADAPTER_NOT_FOUND __constant_cpu_to_le32(0xC0230006)
-#define STATUS_NDIS_OPEN_FAILED __constant_cpu_to_le32(0xC0230007)
-#define STATUS_NDIS_DEVICE_FAILED __constant_cpu_to_le32(0xC0230008)
-#define STATUS_NDIS_MULTICAST_FULL __constant_cpu_to_le32(0xC0230009)
-#define STATUS_NDIS_MULTICAST_EXISTS __constant_cpu_to_le32(0xC023000A)
-#define STATUS_NDIS_MULTICAST_NOT_FOUND __constant_cpu_to_le32(0xC023000B)
-#define STATUS_NDIS_REQUEST_ABORTED __constant_cpu_to_le32(0xC023000C)
-#define STATUS_NDIS_RESET_IN_PROGRESS __constant_cpu_to_le32(0xC023000D)
-#define STATUS_NDIS_INVALID_PACKET __constant_cpu_to_le32(0xC023000F)
-#define STATUS_NDIS_INVALID_DEVICE_REQUEST __constant_cpu_to_le32(0xC0230010)
-#define STATUS_NDIS_ADAPTER_NOT_READY __constant_cpu_to_le32(0xC0230011)
-#define STATUS_NDIS_INVALID_LENGTH __constant_cpu_to_le32(0xC0230014)
-#define STATUS_NDIS_INVALID_DATA __constant_cpu_to_le32(0xC0230015)
-#define STATUS_NDIS_BUFFER_TOO_SHORT __constant_cpu_to_le32(0xC0230016)
-#define STATUS_NDIS_INVALID_OID __constant_cpu_to_le32(0xC0230017)
-#define STATUS_NDIS_ADAPTER_REMOVED __constant_cpu_to_le32(0xC0230018)
-#define STATUS_NDIS_UNSUPPORTED_MEDIA __constant_cpu_to_le32(0xC0230019)
-#define STATUS_NDIS_GROUP_ADDRESS_IN_USE __constant_cpu_to_le32(0xC023001A)
-#define STATUS_NDIS_FILE_NOT_FOUND __constant_cpu_to_le32(0xC023001B)
-#define STATUS_NDIS_ERROR_READING_FILE __constant_cpu_to_le32(0xC023001C)
-#define STATUS_NDIS_ALREADY_MAPPED __constant_cpu_to_le32(0xC023001D)
-#define STATUS_NDIS_RESOURCE_CONFLICT __constant_cpu_to_le32(0xC023001E)
-#define STATUS_NDIS_MEDIA_DISCONNECTED __constant_cpu_to_le32(0xC023001F)
-#define STATUS_NDIS_INVALID_ADDRESS __constant_cpu_to_le32(0xC0230022)
-#define STATUS_NDIS_PAUSED __constant_cpu_to_le32(0xC023002A)
-#define STATUS_NDIS_INTERFACE_NOT_FOUND __constant_cpu_to_le32(0xC023002B)
-#define STATUS_NDIS_UNSUPPORTED_REVISION __constant_cpu_to_le32(0xC023002C)
-#define STATUS_NDIS_INVALID_PORT __constant_cpu_to_le32(0xC023002D)
-#define STATUS_NDIS_INVALID_PORT_STATE __constant_cpu_to_le32(0xC023002E)
-#define STATUS_NDIS_LOW_POWER_STATE __constant_cpu_to_le32(0xC023002F)
-#define STATUS_NDIS_NOT_SUPPORTED __constant_cpu_to_le32(0xC02300BB)
-#define STATUS_NDIS_DOT11_AUTO_CONFIG_ENABLED __constant_cpu_to_le32(0xC0232000)
-#define STATUS_NDIS_DOT11_MEDIA_IN_USE __constant_cpu_to_le32(0xC0232001)
-#define STATUS_NDIS_DOT11_POWER_STATE_INVALID __constant_cpu_to_le32(0xC0232002)
-#define STATUS_IPSEC_BAD_SPI __constant_cpu_to_le32(0xC0360001)
-#define STATUS_IPSEC_SA_LIFETIME_EXPIRED __constant_cpu_to_le32(0xC0360002)
-#define STATUS_IPSEC_WRONG_SA __constant_cpu_to_le32(0xC0360003)
-#define STATUS_IPSEC_REPLAY_CHECK_FAILED __constant_cpu_to_le32(0xC0360004)
-#define STATUS_IPSEC_INVALID_PACKET __constant_cpu_to_le32(0xC0360005)
-#define STATUS_IPSEC_INTEGRITY_CHECK_FAILED __constant_cpu_to_le32(0xC0360006)
-#define STATUS_IPSEC_CLEAR_TEXT_DROP __constant_cpu_to_le32(0xC0360007)
+#define STATUS_SUCCESS cpu_to_le32(0x00000000)
+#define STATUS_WAIT_0 cpu_to_le32(0x00000000)
+#define STATUS_WAIT_1 cpu_to_le32(0x00000001)
+#define STATUS_WAIT_2 cpu_to_le32(0x00000002)
+#define STATUS_WAIT_3 cpu_to_le32(0x00000003)
+#define STATUS_WAIT_63 cpu_to_le32(0x0000003F)
+#define STATUS_ABANDONED cpu_to_le32(0x00000080)
+#define STATUS_ABANDONED_WAIT_0 cpu_to_le32(0x00000080)
+#define STATUS_ABANDONED_WAIT_63 cpu_to_le32(0x000000BF)
+#define STATUS_USER_APC cpu_to_le32(0x000000C0)
+#define STATUS_KERNEL_APC cpu_to_le32(0x00000100)
+#define STATUS_ALERTED cpu_to_le32(0x00000101)
+#define STATUS_TIMEOUT cpu_to_le32(0x00000102)
+#define STATUS_PENDING cpu_to_le32(0x00000103)
+#define STATUS_REPARSE cpu_to_le32(0x00000104)
+#define STATUS_MORE_ENTRIES cpu_to_le32(0x00000105)
+#define STATUS_NOT_ALL_ASSIGNED cpu_to_le32(0x00000106)
+#define STATUS_SOME_NOT_MAPPED cpu_to_le32(0x00000107)
+#define STATUS_OPLOCK_BREAK_IN_PROGRESS cpu_to_le32(0x00000108)
+#define STATUS_VOLUME_MOUNTED cpu_to_le32(0x00000109)
+#define STATUS_RXACT_COMMITTED cpu_to_le32(0x0000010A)
+#define STATUS_NOTIFY_CLEANUP cpu_to_le32(0x0000010B)
+#define STATUS_NOTIFY_ENUM_DIR cpu_to_le32(0x0000010C)
+#define STATUS_NO_QUOTAS_FOR_ACCOUNT cpu_to_le32(0x0000010D)
+#define STATUS_PRIMARY_TRANSPORT_CONNECT_FAILED cpu_to_le32(0x0000010E)
+#define STATUS_PAGE_FAULT_TRANSITION cpu_to_le32(0x00000110)
+#define STATUS_PAGE_FAULT_DEMAND_ZERO cpu_to_le32(0x00000111)
+#define STATUS_PAGE_FAULT_COPY_ON_WRITE cpu_to_le32(0x00000112)
+#define STATUS_PAGE_FAULT_GUARD_PAGE cpu_to_le32(0x00000113)
+#define STATUS_PAGE_FAULT_PAGING_FILE cpu_to_le32(0x00000114)
+#define STATUS_CACHE_PAGE_LOCKED cpu_to_le32(0x00000115)
+#define STATUS_CRASH_DUMP cpu_to_le32(0x00000116)
+#define STATUS_BUFFER_ALL_ZEROS cpu_to_le32(0x00000117)
+#define STATUS_REPARSE_OBJECT cpu_to_le32(0x00000118)
+#define STATUS_RESOURCE_REQUIREMENTS_CHANGED cpu_to_le32(0x00000119)
+#define STATUS_TRANSLATION_COMPLETE cpu_to_le32(0x00000120)
+#define STATUS_DS_MEMBERSHIP_EVALUATED_LOCALLY cpu_to_le32(0x00000121)
+#define STATUS_NOTHING_TO_TERMINATE cpu_to_le32(0x00000122)
+#define STATUS_PROCESS_NOT_IN_JOB cpu_to_le32(0x00000123)
+#define STATUS_PROCESS_IN_JOB cpu_to_le32(0x00000124)
+#define STATUS_VOLSNAP_HIBERNATE_READY cpu_to_le32(0x00000125)
+#define STATUS_FSFILTER_OP_COMPLETED_SUCCESSFULLY cpu_to_le32(0x00000126)
+#define STATUS_INTERRUPT_VECTOR_ALREADY_CONNECTED cpu_to_le32(0x00000127)
+#define STATUS_INTERRUPT_STILL_CONNECTED cpu_to_le32(0x00000128)
+#define STATUS_PROCESS_CLONED cpu_to_le32(0x00000129)
+#define STATUS_FILE_LOCKED_WITH_ONLY_READERS cpu_to_le32(0x0000012A)
+#define STATUS_FILE_LOCKED_WITH_WRITERS cpu_to_le32(0x0000012B)
+#define STATUS_RESOURCEMANAGER_READ_ONLY cpu_to_le32(0x00000202)
+#define STATUS_WAIT_FOR_OPLOCK cpu_to_le32(0x00000367)
+#define DBG_EXCEPTION_HANDLED cpu_to_le32(0x00010001)
+#define DBG_CONTINUE cpu_to_le32(0x00010002)
+#define STATUS_FLT_IO_COMPLETE cpu_to_le32(0x001C0001)
+#define STATUS_OBJECT_NAME_EXISTS cpu_to_le32(0x40000000)
+#define STATUS_THREAD_WAS_SUSPENDED cpu_to_le32(0x40000001)
+#define STATUS_WORKING_SET_LIMIT_RANGE cpu_to_le32(0x40000002)
+#define STATUS_IMAGE_NOT_AT_BASE cpu_to_le32(0x40000003)
+#define STATUS_RXACT_STATE_CREATED cpu_to_le32(0x40000004)
+#define STATUS_SEGMENT_NOTIFICATION cpu_to_le32(0x40000005)
+#define STATUS_LOCAL_USER_SESSION_KEY cpu_to_le32(0x40000006)
+#define STATUS_BAD_CURRENT_DIRECTORY cpu_to_le32(0x40000007)
+#define STATUS_SERIAL_MORE_WRITES cpu_to_le32(0x40000008)
+#define STATUS_REGISTRY_RECOVERED cpu_to_le32(0x40000009)
+#define STATUS_FT_READ_RECOVERY_FROM_BACKUP cpu_to_le32(0x4000000A)
+#define STATUS_FT_WRITE_RECOVERY cpu_to_le32(0x4000000B)
+#define STATUS_SERIAL_COUNTER_TIMEOUT cpu_to_le32(0x4000000C)
+#define STATUS_NULL_LM_PASSWORD cpu_to_le32(0x4000000D)
+#define STATUS_IMAGE_MACHINE_TYPE_MISMATCH cpu_to_le32(0x4000000E)
+#define STATUS_RECEIVE_PARTIAL cpu_to_le32(0x4000000F)
+#define STATUS_RECEIVE_EXPEDITED cpu_to_le32(0x40000010)
+#define STATUS_RECEIVE_PARTIAL_EXPEDITED cpu_to_le32(0x40000011)
+#define STATUS_EVENT_DONE cpu_to_le32(0x40000012)
+#define STATUS_EVENT_PENDING cpu_to_le32(0x40000013)
+#define STATUS_CHECKING_FILE_SYSTEM cpu_to_le32(0x40000014)
+#define STATUS_FATAL_APP_EXIT cpu_to_le32(0x40000015)
+#define STATUS_PREDEFINED_HANDLE cpu_to_le32(0x40000016)
+#define STATUS_WAS_UNLOCKED cpu_to_le32(0x40000017)
+#define STATUS_SERVICE_NOTIFICATION cpu_to_le32(0x40000018)
+#define STATUS_WAS_LOCKED cpu_to_le32(0x40000019)
+#define STATUS_LOG_HARD_ERROR cpu_to_le32(0x4000001A)
+#define STATUS_ALREADY_WIN32 cpu_to_le32(0x4000001B)
+#define STATUS_WX86_UNSIMULATE cpu_to_le32(0x4000001C)
+#define STATUS_WX86_CONTINUE cpu_to_le32(0x4000001D)
+#define STATUS_WX86_SINGLE_STEP cpu_to_le32(0x4000001E)
+#define STATUS_WX86_BREAKPOINT cpu_to_le32(0x4000001F)
+#define STATUS_WX86_EXCEPTION_CONTINUE cpu_to_le32(0x40000020)
+#define STATUS_WX86_EXCEPTION_LASTCHANCE cpu_to_le32(0x40000021)
+#define STATUS_WX86_EXCEPTION_CHAIN cpu_to_le32(0x40000022)
+#define STATUS_IMAGE_MACHINE_TYPE_MISMATCH_EXE cpu_to_le32(0x40000023)
+#define STATUS_NO_YIELD_PERFORMED cpu_to_le32(0x40000024)
+#define STATUS_TIMER_RESUME_IGNORED cpu_to_le32(0x40000025)
+#define STATUS_ARBITRATION_UNHANDLED cpu_to_le32(0x40000026)
+#define STATUS_CARDBUS_NOT_SUPPORTED cpu_to_le32(0x40000027)
+#define STATUS_WX86_CREATEWX86TIB cpu_to_le32(0x40000028)
+#define STATUS_MP_PROCESSOR_MISMATCH cpu_to_le32(0x40000029)
+#define STATUS_HIBERNATED cpu_to_le32(0x4000002A)
+#define STATUS_RESUME_HIBERNATION cpu_to_le32(0x4000002B)
+#define STATUS_FIRMWARE_UPDATED cpu_to_le32(0x4000002C)
+#define STATUS_DRIVERS_LEAKING_LOCKED_PAGES cpu_to_le32(0x4000002D)
+#define STATUS_MESSAGE_RETRIEVED cpu_to_le32(0x4000002E)
+#define STATUS_SYSTEM_POWERSTATE_TRANSITION cpu_to_le32(0x4000002F)
+#define STATUS_ALPC_CHECK_COMPLETION_LIST cpu_to_le32(0x40000030)
+#define STATUS_SYSTEM_POWERSTATE_COMPLEX_TRANSITION cpu_to_le32(0x40000031)
+#define STATUS_ACCESS_AUDIT_BY_POLICY cpu_to_le32(0x40000032)
+#define STATUS_ABANDON_HIBERFILE cpu_to_le32(0x40000033)
+#define STATUS_BIZRULES_NOT_ENABLED cpu_to_le32(0x40000034)
+#define STATUS_WAKE_SYSTEM cpu_to_le32(0x40000294)
+#define STATUS_DS_SHUTTING_DOWN cpu_to_le32(0x40000370)
+#define DBG_REPLY_LATER cpu_to_le32(0x40010001)
+#define DBG_UNABLE_TO_PROVIDE_HANDLE cpu_to_le32(0x40010002)
+#define DBG_TERMINATE_THREAD cpu_to_le32(0x40010003)
+#define DBG_TERMINATE_PROCESS cpu_to_le32(0x40010004)
+#define DBG_CONTROL_C cpu_to_le32(0x40010005)
+#define DBG_PRINTEXCEPTION_C cpu_to_le32(0x40010006)
+#define DBG_RIPEXCEPTION cpu_to_le32(0x40010007)
+#define DBG_CONTROL_BREAK cpu_to_le32(0x40010008)
+#define DBG_COMMAND_EXCEPTION cpu_to_le32(0x40010009)
+#define RPC_NT_UUID_LOCAL_ONLY cpu_to_le32(0x40020056)
+#define RPC_NT_SEND_INCOMPLETE cpu_to_le32(0x400200AF)
+#define STATUS_CTX_CDM_CONNECT cpu_to_le32(0x400A0004)
+#define STATUS_CTX_CDM_DISCONNECT cpu_to_le32(0x400A0005)
+#define STATUS_SXS_RELEASE_ACTIVATION_CONTEXT cpu_to_le32(0x4015000D)
+#define STATUS_RECOVERY_NOT_NEEDED cpu_to_le32(0x40190034)
+#define STATUS_RM_ALREADY_STARTED cpu_to_le32(0x40190035)
+#define STATUS_LOG_NO_RESTART cpu_to_le32(0x401A000C)
+#define STATUS_VIDEO_DRIVER_DEBUG_REPORT_REQUEST cpu_to_le32(0x401B00EC)
+#define STATUS_GRAPHICS_PARTIAL_DATA_POPULATED cpu_to_le32(0x401E000A)
+#define STATUS_GRAPHICS_DRIVER_MISMATCH cpu_to_le32(0x401E0117)
+#define STATUS_GRAPHICS_MODE_NOT_PINNED cpu_to_le32(0x401E0307)
+#define STATUS_GRAPHICS_NO_PREFERRED_MODE cpu_to_le32(0x401E031E)
+#define STATUS_GRAPHICS_DATASET_IS_EMPTY cpu_to_le32(0x401E034B)
+#define STATUS_GRAPHICS_NO_MORE_ELEMENTS_IN_DATASET cpu_to_le32(0x401E034C)
+#define STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_PINNED cpu_to_le32(0x401E0351)
+#define STATUS_GRAPHICS_UNKNOWN_CHILD_STATUS cpu_to_le32(0x401E042F)
+#define STATUS_GRAPHICS_LEADLINK_START_DEFERRED cpu_to_le32(0x401E0437)
+#define STATUS_GRAPHICS_POLLING_TOO_FREQUENTLY cpu_to_le32(0x401E0439)
+#define STATUS_GRAPHICS_START_DEFERRED cpu_to_le32(0x401E043A)
+#define STATUS_NDIS_INDICATION_REQUIRED cpu_to_le32(0x40230001)
+#define STATUS_GUARD_PAGE_VIOLATION cpu_to_le32(0x80000001)
+#define STATUS_DATATYPE_MISALIGNMENT cpu_to_le32(0x80000002)
+#define STATUS_BREAKPOINT cpu_to_le32(0x80000003)
+#define STATUS_SINGLE_STEP cpu_to_le32(0x80000004)
+#define STATUS_BUFFER_OVERFLOW cpu_to_le32(0x80000005)
+#define STATUS_NO_MORE_FILES cpu_to_le32(0x80000006)
+#define STATUS_WAKE_SYSTEM_DEBUGGER cpu_to_le32(0x80000007)
+#define STATUS_HANDLES_CLOSED cpu_to_le32(0x8000000A)
+#define STATUS_NO_INHERITANCE cpu_to_le32(0x8000000B)
+#define STATUS_GUID_SUBSTITUTION_MADE cpu_to_le32(0x8000000C)
+#define STATUS_PARTIAL_COPY cpu_to_le32(0x8000000D)
+#define STATUS_DEVICE_PAPER_EMPTY cpu_to_le32(0x8000000E)
+#define STATUS_DEVICE_POWERED_OFF cpu_to_le32(0x8000000F)
+#define STATUS_DEVICE_OFF_LINE cpu_to_le32(0x80000010)
+#define STATUS_DEVICE_BUSY cpu_to_le32(0x80000011)
+#define STATUS_NO_MORE_EAS cpu_to_le32(0x80000012)
+#define STATUS_INVALID_EA_NAME cpu_to_le32(0x80000013)
+#define STATUS_EA_LIST_INCONSISTENT cpu_to_le32(0x80000014)
+#define STATUS_INVALID_EA_FLAG cpu_to_le32(0x80000015)
+#define STATUS_VERIFY_REQUIRED cpu_to_le32(0x80000016)
+#define STATUS_EXTRANEOUS_INFORMATION cpu_to_le32(0x80000017)
+#define STATUS_RXACT_COMMIT_NECESSARY cpu_to_le32(0x80000018)
+#define STATUS_NO_MORE_ENTRIES cpu_to_le32(0x8000001A)
+#define STATUS_FILEMARK_DETECTED cpu_to_le32(0x8000001B)
+#define STATUS_MEDIA_CHANGED cpu_to_le32(0x8000001C)
+#define STATUS_BUS_RESET cpu_to_le32(0x8000001D)
+#define STATUS_END_OF_MEDIA cpu_to_le32(0x8000001E)
+#define STATUS_BEGINNING_OF_MEDIA cpu_to_le32(0x8000001F)
+#define STATUS_MEDIA_CHECK cpu_to_le32(0x80000020)
+#define STATUS_SETMARK_DETECTED cpu_to_le32(0x80000021)
+#define STATUS_NO_DATA_DETECTED cpu_to_le32(0x80000022)
+#define STATUS_REDIRECTOR_HAS_OPEN_HANDLES cpu_to_le32(0x80000023)
+#define STATUS_SERVER_HAS_OPEN_HANDLES cpu_to_le32(0x80000024)
+#define STATUS_ALREADY_DISCONNECTED cpu_to_le32(0x80000025)
+#define STATUS_LONGJUMP cpu_to_le32(0x80000026)
+#define STATUS_CLEANER_CARTRIDGE_INSTALLED cpu_to_le32(0x80000027)
+#define STATUS_PLUGPLAY_QUERY_VETOED cpu_to_le32(0x80000028)
+#define STATUS_UNWIND_CONSOLIDATE cpu_to_le32(0x80000029)
+#define STATUS_REGISTRY_HIVE_RECOVERED cpu_to_le32(0x8000002A)
+#define STATUS_DLL_MIGHT_BE_INSECURE cpu_to_le32(0x8000002B)
+#define STATUS_DLL_MIGHT_BE_INCOMPATIBLE cpu_to_le32(0x8000002C)
+#define STATUS_STOPPED_ON_SYMLINK cpu_to_le32(0x8000002D)
+#define STATUS_DEVICE_REQUIRES_CLEANING cpu_to_le32(0x80000288)
+#define STATUS_DEVICE_DOOR_OPEN cpu_to_le32(0x80000289)
+#define STATUS_DATA_LOST_REPAIR cpu_to_le32(0x80000803)
+#define DBG_EXCEPTION_NOT_HANDLED cpu_to_le32(0x80010001)
+#define STATUS_CLUSTER_NODE_ALREADY_UP cpu_to_le32(0x80130001)
+#define STATUS_CLUSTER_NODE_ALREADY_DOWN cpu_to_le32(0x80130002)
+#define STATUS_CLUSTER_NETWORK_ALREADY_ONLINE cpu_to_le32(0x80130003)
+#define STATUS_CLUSTER_NETWORK_ALREADY_OFFLINE cpu_to_le32(0x80130004)
+#define STATUS_CLUSTER_NODE_ALREADY_MEMBER cpu_to_le32(0x80130005)
+#define STATUS_COULD_NOT_RESIZE_LOG cpu_to_le32(0x80190009)
+#define STATUS_NO_TXF_METADATA cpu_to_le32(0x80190029)
+#define STATUS_CANT_RECOVER_WITH_HANDLE_OPEN cpu_to_le32(0x80190031)
+#define STATUS_TXF_METADATA_ALREADY_PRESENT cpu_to_le32(0x80190041)
+#define STATUS_TRANSACTION_SCOPE_CALLBACKS_NOT_SET cpu_to_le32(0x80190042)
+#define STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD_RECOVERED cpu_to_le32(0x801B00EB)
+#define STATUS_FLT_BUFFER_TOO_SMALL cpu_to_le32(0x801C0001)
+#define STATUS_FVE_PARTIAL_METADATA cpu_to_le32(0x80210001)
+#define STATUS_UNSUCCESSFUL cpu_to_le32(0xC0000001)
+#define STATUS_NOT_IMPLEMENTED cpu_to_le32(0xC0000002)
+#define STATUS_INVALID_INFO_CLASS cpu_to_le32(0xC0000003)
+#define STATUS_INFO_LENGTH_MISMATCH cpu_to_le32(0xC0000004)
+#define STATUS_ACCESS_VIOLATION cpu_to_le32(0xC0000005)
+#define STATUS_IN_PAGE_ERROR cpu_to_le32(0xC0000006)
+#define STATUS_PAGEFILE_QUOTA cpu_to_le32(0xC0000007)
+#define STATUS_INVALID_HANDLE cpu_to_le32(0xC0000008)
+#define STATUS_BAD_INITIAL_STACK cpu_to_le32(0xC0000009)
+#define STATUS_BAD_INITIAL_PC cpu_to_le32(0xC000000A)
+#define STATUS_INVALID_CID cpu_to_le32(0xC000000B)
+#define STATUS_TIMER_NOT_CANCELED cpu_to_le32(0xC000000C)
+#define STATUS_INVALID_PARAMETER cpu_to_le32(0xC000000D)
+#define STATUS_NO_SUCH_DEVICE cpu_to_le32(0xC000000E)
+#define STATUS_NO_SUCH_FILE cpu_to_le32(0xC000000F)
+#define STATUS_INVALID_DEVICE_REQUEST cpu_to_le32(0xC0000010)
+#define STATUS_END_OF_FILE cpu_to_le32(0xC0000011)
+#define STATUS_WRONG_VOLUME cpu_to_le32(0xC0000012)
+#define STATUS_NO_MEDIA_IN_DEVICE cpu_to_le32(0xC0000013)
+#define STATUS_UNRECOGNIZED_MEDIA cpu_to_le32(0xC0000014)
+#define STATUS_NONEXISTENT_SECTOR cpu_to_le32(0xC0000015)
+#define STATUS_MORE_PROCESSING_REQUIRED cpu_to_le32(0xC0000016)
+#define STATUS_NO_MEMORY cpu_to_le32(0xC0000017)
+#define STATUS_CONFLICTING_ADDRESSES cpu_to_le32(0xC0000018)
+#define STATUS_NOT_MAPPED_VIEW cpu_to_le32(0xC0000019)
+#define STATUS_UNABLE_TO_FREE_VM cpu_to_le32(0xC000001A)
+#define STATUS_UNABLE_TO_DELETE_SECTION cpu_to_le32(0xC000001B)
+#define STATUS_INVALID_SYSTEM_SERVICE cpu_to_le32(0xC000001C)
+#define STATUS_ILLEGAL_INSTRUCTION cpu_to_le32(0xC000001D)
+#define STATUS_INVALID_LOCK_SEQUENCE cpu_to_le32(0xC000001E)
+#define STATUS_INVALID_VIEW_SIZE cpu_to_le32(0xC000001F)
+#define STATUS_INVALID_FILE_FOR_SECTION cpu_to_le32(0xC0000020)
+#define STATUS_ALREADY_COMMITTED cpu_to_le32(0xC0000021)
+#define STATUS_ACCESS_DENIED cpu_to_le32(0xC0000022)
+#define STATUS_BUFFER_TOO_SMALL cpu_to_le32(0xC0000023)
+#define STATUS_OBJECT_TYPE_MISMATCH cpu_to_le32(0xC0000024)
+#define STATUS_NONCONTINUABLE_EXCEPTION cpu_to_le32(0xC0000025)
+#define STATUS_INVALID_DISPOSITION cpu_to_le32(0xC0000026)
+#define STATUS_UNWIND cpu_to_le32(0xC0000027)
+#define STATUS_BAD_STACK cpu_to_le32(0xC0000028)
+#define STATUS_INVALID_UNWIND_TARGET cpu_to_le32(0xC0000029)
+#define STATUS_NOT_LOCKED cpu_to_le32(0xC000002A)
+#define STATUS_PARITY_ERROR cpu_to_le32(0xC000002B)
+#define STATUS_UNABLE_TO_DECOMMIT_VM cpu_to_le32(0xC000002C)
+#define STATUS_NOT_COMMITTED cpu_to_le32(0xC000002D)
+#define STATUS_INVALID_PORT_ATTRIBUTES cpu_to_le32(0xC000002E)
+#define STATUS_PORT_MESSAGE_TOO_LONG cpu_to_le32(0xC000002F)
+#define STATUS_INVALID_PARAMETER_MIX cpu_to_le32(0xC0000030)
+#define STATUS_INVALID_QUOTA_LOWER cpu_to_le32(0xC0000031)
+#define STATUS_DISK_CORRUPT_ERROR cpu_to_le32(0xC0000032)
+#define STATUS_OBJECT_NAME_INVALID cpu_to_le32(0xC0000033)
+#define STATUS_OBJECT_NAME_NOT_FOUND cpu_to_le32(0xC0000034)
+#define STATUS_OBJECT_NAME_COLLISION cpu_to_le32(0xC0000035)
+#define STATUS_PORT_DISCONNECTED cpu_to_le32(0xC0000037)
+#define STATUS_DEVICE_ALREADY_ATTACHED cpu_to_le32(0xC0000038)
+#define STATUS_OBJECT_PATH_INVALID cpu_to_le32(0xC0000039)
+#define STATUS_OBJECT_PATH_NOT_FOUND cpu_to_le32(0xC000003A)
+#define STATUS_OBJECT_PATH_SYNTAX_BAD cpu_to_le32(0xC000003B)
+#define STATUS_DATA_OVERRUN cpu_to_le32(0xC000003C)
+#define STATUS_DATA_LATE_ERROR cpu_to_le32(0xC000003D)
+#define STATUS_DATA_ERROR cpu_to_le32(0xC000003E)
+#define STATUS_CRC_ERROR cpu_to_le32(0xC000003F)
+#define STATUS_SECTION_TOO_BIG cpu_to_le32(0xC0000040)
+#define STATUS_PORT_CONNECTION_REFUSED cpu_to_le32(0xC0000041)
+#define STATUS_INVALID_PORT_HANDLE cpu_to_le32(0xC0000042)
+#define STATUS_SHARING_VIOLATION cpu_to_le32(0xC0000043)
+#define STATUS_QUOTA_EXCEEDED cpu_to_le32(0xC0000044)
+#define STATUS_INVALID_PAGE_PROTECTION cpu_to_le32(0xC0000045)
+#define STATUS_MUTANT_NOT_OWNED cpu_to_le32(0xC0000046)
+#define STATUS_SEMAPHORE_LIMIT_EXCEEDED cpu_to_le32(0xC0000047)
+#define STATUS_PORT_ALREADY_SET cpu_to_le32(0xC0000048)
+#define STATUS_SECTION_NOT_IMAGE cpu_to_le32(0xC0000049)
+#define STATUS_SUSPEND_COUNT_EXCEEDED cpu_to_le32(0xC000004A)
+#define STATUS_THREAD_IS_TERMINATING cpu_to_le32(0xC000004B)
+#define STATUS_BAD_WORKING_SET_LIMIT cpu_to_le32(0xC000004C)
+#define STATUS_INCOMPATIBLE_FILE_MAP cpu_to_le32(0xC000004D)
+#define STATUS_SECTION_PROTECTION cpu_to_le32(0xC000004E)
+#define STATUS_EAS_NOT_SUPPORTED cpu_to_le32(0xC000004F)
+#define STATUS_EA_TOO_LARGE cpu_to_le32(0xC0000050)
+#define STATUS_NONEXISTENT_EA_ENTRY cpu_to_le32(0xC0000051)
+#define STATUS_NO_EAS_ON_FILE cpu_to_le32(0xC0000052)
+#define STATUS_EA_CORRUPT_ERROR cpu_to_le32(0xC0000053)
+#define STATUS_FILE_LOCK_CONFLICT cpu_to_le32(0xC0000054)
+#define STATUS_LOCK_NOT_GRANTED cpu_to_le32(0xC0000055)
+#define STATUS_DELETE_PENDING cpu_to_le32(0xC0000056)
+#define STATUS_CTL_FILE_NOT_SUPPORTED cpu_to_le32(0xC0000057)
+#define STATUS_UNKNOWN_REVISION cpu_to_le32(0xC0000058)
+#define STATUS_REVISION_MISMATCH cpu_to_le32(0xC0000059)
+#define STATUS_INVALID_OWNER cpu_to_le32(0xC000005A)
+#define STATUS_INVALID_PRIMARY_GROUP cpu_to_le32(0xC000005B)
+#define STATUS_NO_IMPERSONATION_TOKEN cpu_to_le32(0xC000005C)
+#define STATUS_CANT_DISABLE_MANDATORY cpu_to_le32(0xC000005D)
+#define STATUS_NO_LOGON_SERVERS cpu_to_le32(0xC000005E)
+#define STATUS_NO_SUCH_LOGON_SESSION cpu_to_le32(0xC000005F)
+#define STATUS_NO_SUCH_PRIVILEGE cpu_to_le32(0xC0000060)
+#define STATUS_PRIVILEGE_NOT_HELD cpu_to_le32(0xC0000061)
+#define STATUS_INVALID_ACCOUNT_NAME cpu_to_le32(0xC0000062)
+#define STATUS_USER_EXISTS cpu_to_le32(0xC0000063)
+#define STATUS_NO_SUCH_USER cpu_to_le32(0xC0000064)
+#define STATUS_GROUP_EXISTS cpu_to_le32(0xC0000065)
+#define STATUS_NO_SUCH_GROUP cpu_to_le32(0xC0000066)
+#define STATUS_MEMBER_IN_GROUP cpu_to_le32(0xC0000067)
+#define STATUS_MEMBER_NOT_IN_GROUP cpu_to_le32(0xC0000068)
+#define STATUS_LAST_ADMIN cpu_to_le32(0xC0000069)
+#define STATUS_WRONG_PASSWORD cpu_to_le32(0xC000006A)
+#define STATUS_ILL_FORMED_PASSWORD cpu_to_le32(0xC000006B)
+#define STATUS_PASSWORD_RESTRICTION cpu_to_le32(0xC000006C)
+#define STATUS_LOGON_FAILURE cpu_to_le32(0xC000006D)
+#define STATUS_ACCOUNT_RESTRICTION cpu_to_le32(0xC000006E)
+#define STATUS_INVALID_LOGON_HOURS cpu_to_le32(0xC000006F)
+#define STATUS_INVALID_WORKSTATION cpu_to_le32(0xC0000070)
+#define STATUS_PASSWORD_EXPIRED cpu_to_le32(0xC0000071)
+#define STATUS_ACCOUNT_DISABLED cpu_to_le32(0xC0000072)
+#define STATUS_NONE_MAPPED cpu_to_le32(0xC0000073)
+#define STATUS_TOO_MANY_LUIDS_REQUESTED cpu_to_le32(0xC0000074)
+#define STATUS_LUIDS_EXHAUSTED cpu_to_le32(0xC0000075)
+#define STATUS_INVALID_SUB_AUTHORITY cpu_to_le32(0xC0000076)
+#define STATUS_INVALID_ACL cpu_to_le32(0xC0000077)
+#define STATUS_INVALID_SID cpu_to_le32(0xC0000078)
+#define STATUS_INVALID_SECURITY_DESCR cpu_to_le32(0xC0000079)
+#define STATUS_PROCEDURE_NOT_FOUND cpu_to_le32(0xC000007A)
+#define STATUS_INVALID_IMAGE_FORMAT cpu_to_le32(0xC000007B)
+#define STATUS_NO_TOKEN cpu_to_le32(0xC000007C)
+#define STATUS_BAD_INHERITANCE_ACL cpu_to_le32(0xC000007D)
+#define STATUS_RANGE_NOT_LOCKED cpu_to_le32(0xC000007E)
+#define STATUS_DISK_FULL cpu_to_le32(0xC000007F)
+#define STATUS_SERVER_DISABLED cpu_to_le32(0xC0000080)
+#define STATUS_SERVER_NOT_DISABLED cpu_to_le32(0xC0000081)
+#define STATUS_TOO_MANY_GUIDS_REQUESTED cpu_to_le32(0xC0000082)
+#define STATUS_GUIDS_EXHAUSTED cpu_to_le32(0xC0000083)
+#define STATUS_INVALID_ID_AUTHORITY cpu_to_le32(0xC0000084)
+#define STATUS_AGENTS_EXHAUSTED cpu_to_le32(0xC0000085)
+#define STATUS_INVALID_VOLUME_LABEL cpu_to_le32(0xC0000086)
+#define STATUS_SECTION_NOT_EXTENDED cpu_to_le32(0xC0000087)
+#define STATUS_NOT_MAPPED_DATA cpu_to_le32(0xC0000088)
+#define STATUS_RESOURCE_DATA_NOT_FOUND cpu_to_le32(0xC0000089)
+#define STATUS_RESOURCE_TYPE_NOT_FOUND cpu_to_le32(0xC000008A)
+#define STATUS_RESOURCE_NAME_NOT_FOUND cpu_to_le32(0xC000008B)
+#define STATUS_ARRAY_BOUNDS_EXCEEDED cpu_to_le32(0xC000008C)
+#define STATUS_FLOAT_DENORMAL_OPERAND cpu_to_le32(0xC000008D)
+#define STATUS_FLOAT_DIVIDE_BY_ZERO cpu_to_le32(0xC000008E)
+#define STATUS_FLOAT_INEXACT_RESULT cpu_to_le32(0xC000008F)
+#define STATUS_FLOAT_INVALID_OPERATION cpu_to_le32(0xC0000090)
+#define STATUS_FLOAT_OVERFLOW cpu_to_le32(0xC0000091)
+#define STATUS_FLOAT_STACK_CHECK cpu_to_le32(0xC0000092)
+#define STATUS_FLOAT_UNDERFLOW cpu_to_le32(0xC0000093)
+#define STATUS_INTEGER_DIVIDE_BY_ZERO cpu_to_le32(0xC0000094)
+#define STATUS_INTEGER_OVERFLOW cpu_to_le32(0xC0000095)
+#define STATUS_PRIVILEGED_INSTRUCTION cpu_to_le32(0xC0000096)
+#define STATUS_TOO_MANY_PAGING_FILES cpu_to_le32(0xC0000097)
+#define STATUS_FILE_INVALID cpu_to_le32(0xC0000098)
+#define STATUS_ALLOTTED_SPACE_EXCEEDED cpu_to_le32(0xC0000099)
+#define STATUS_INSUFFICIENT_RESOURCES cpu_to_le32(0xC000009A)
+#define STATUS_DFS_EXIT_PATH_FOUND cpu_to_le32(0xC000009B)
+#define STATUS_DEVICE_DATA_ERROR cpu_to_le32(0xC000009C)
+#define STATUS_DEVICE_NOT_CONNECTED cpu_to_le32(0xC000009D)
+#define STATUS_DEVICE_POWER_FAILURE cpu_to_le32(0xC000009E)
+#define STATUS_FREE_VM_NOT_AT_BASE cpu_to_le32(0xC000009F)
+#define STATUS_MEMORY_NOT_ALLOCATED cpu_to_le32(0xC00000A0)
+#define STATUS_WORKING_SET_QUOTA cpu_to_le32(0xC00000A1)
+#define STATUS_MEDIA_WRITE_PROTECTED cpu_to_le32(0xC00000A2)
+#define STATUS_DEVICE_NOT_READY cpu_to_le32(0xC00000A3)
+#define STATUS_INVALID_GROUP_ATTRIBUTES cpu_to_le32(0xC00000A4)
+#define STATUS_BAD_IMPERSONATION_LEVEL cpu_to_le32(0xC00000A5)
+#define STATUS_CANT_OPEN_ANONYMOUS cpu_to_le32(0xC00000A6)
+#define STATUS_BAD_VALIDATION_CLASS cpu_to_le32(0xC00000A7)
+#define STATUS_BAD_TOKEN_TYPE cpu_to_le32(0xC00000A8)
+#define STATUS_BAD_MASTER_BOOT_RECORD cpu_to_le32(0xC00000A9)
+#define STATUS_INSTRUCTION_MISALIGNMENT cpu_to_le32(0xC00000AA)
+#define STATUS_INSTANCE_NOT_AVAILABLE cpu_to_le32(0xC00000AB)
+#define STATUS_PIPE_NOT_AVAILABLE cpu_to_le32(0xC00000AC)
+#define STATUS_INVALID_PIPE_STATE cpu_to_le32(0xC00000AD)
+#define STATUS_PIPE_BUSY cpu_to_le32(0xC00000AE)
+#define STATUS_ILLEGAL_FUNCTION cpu_to_le32(0xC00000AF)
+#define STATUS_PIPE_DISCONNECTED cpu_to_le32(0xC00000B0)
+#define STATUS_PIPE_CLOSING cpu_to_le32(0xC00000B1)
+#define STATUS_PIPE_CONNECTED cpu_to_le32(0xC00000B2)
+#define STATUS_PIPE_LISTENING cpu_to_le32(0xC00000B3)
+#define STATUS_INVALID_READ_MODE cpu_to_le32(0xC00000B4)
+#define STATUS_IO_TIMEOUT cpu_to_le32(0xC00000B5)
+#define STATUS_FILE_FORCED_CLOSED cpu_to_le32(0xC00000B6)
+#define STATUS_PROFILING_NOT_STARTED cpu_to_le32(0xC00000B7)
+#define STATUS_PROFILING_NOT_STOPPED cpu_to_le32(0xC00000B8)
+#define STATUS_COULD_NOT_INTERPRET cpu_to_le32(0xC00000B9)
+#define STATUS_FILE_IS_A_DIRECTORY cpu_to_le32(0xC00000BA)
+#define STATUS_NOT_SUPPORTED cpu_to_le32(0xC00000BB)
+#define STATUS_REMOTE_NOT_LISTENING cpu_to_le32(0xC00000BC)
+#define STATUS_DUPLICATE_NAME cpu_to_le32(0xC00000BD)
+#define STATUS_BAD_NETWORK_PATH cpu_to_le32(0xC00000BE)
+#define STATUS_NETWORK_BUSY cpu_to_le32(0xC00000BF)
+#define STATUS_DEVICE_DOES_NOT_EXIST cpu_to_le32(0xC00000C0)
+#define STATUS_TOO_MANY_COMMANDS cpu_to_le32(0xC00000C1)
+#define STATUS_ADAPTER_HARDWARE_ERROR cpu_to_le32(0xC00000C2)
+#define STATUS_INVALID_NETWORK_RESPONSE cpu_to_le32(0xC00000C3)
+#define STATUS_UNEXPECTED_NETWORK_ERROR cpu_to_le32(0xC00000C4)
+#define STATUS_BAD_REMOTE_ADAPTER cpu_to_le32(0xC00000C5)
+#define STATUS_PRINT_QUEUE_FULL cpu_to_le32(0xC00000C6)
+#define STATUS_NO_SPOOL_SPACE cpu_to_le32(0xC00000C7)
+#define STATUS_PRINT_CANCELLED cpu_to_le32(0xC00000C8)
+#define STATUS_NETWORK_NAME_DELETED cpu_to_le32(0xC00000C9)
+#define STATUS_NETWORK_ACCESS_DENIED cpu_to_le32(0xC00000CA)
+#define STATUS_BAD_DEVICE_TYPE cpu_to_le32(0xC00000CB)
+#define STATUS_BAD_NETWORK_NAME cpu_to_le32(0xC00000CC)
+#define STATUS_TOO_MANY_NAMES cpu_to_le32(0xC00000CD)
+#define STATUS_TOO_MANY_SESSIONS cpu_to_le32(0xC00000CE)
+#define STATUS_SHARING_PAUSED cpu_to_le32(0xC00000CF)
+#define STATUS_REQUEST_NOT_ACCEPTED cpu_to_le32(0xC00000D0)
+#define STATUS_REDIRECTOR_PAUSED cpu_to_le32(0xC00000D1)
+#define STATUS_NET_WRITE_FAULT cpu_to_le32(0xC00000D2)
+#define STATUS_PROFILING_AT_LIMIT cpu_to_le32(0xC00000D3)
+#define STATUS_NOT_SAME_DEVICE cpu_to_le32(0xC00000D4)
+#define STATUS_FILE_RENAMED cpu_to_le32(0xC00000D5)
+#define STATUS_VIRTUAL_CIRCUIT_CLOSED cpu_to_le32(0xC00000D6)
+#define STATUS_NO_SECURITY_ON_OBJECT cpu_to_le32(0xC00000D7)
+#define STATUS_CANT_WAIT cpu_to_le32(0xC00000D8)
+#define STATUS_PIPE_EMPTY cpu_to_le32(0xC00000D9)
+#define STATUS_CANT_ACCESS_DOMAIN_INFO cpu_to_le32(0xC00000DA)
+#define STATUS_CANT_TERMINATE_SELF cpu_to_le32(0xC00000DB)
+#define STATUS_INVALID_SERVER_STATE cpu_to_le32(0xC00000DC)
+#define STATUS_INVALID_DOMAIN_STATE cpu_to_le32(0xC00000DD)
+#define STATUS_INVALID_DOMAIN_ROLE cpu_to_le32(0xC00000DE)
+#define STATUS_NO_SUCH_DOMAIN cpu_to_le32(0xC00000DF)
+#define STATUS_DOMAIN_EXISTS cpu_to_le32(0xC00000E0)
+#define STATUS_DOMAIN_LIMIT_EXCEEDED cpu_to_le32(0xC00000E1)
+#define STATUS_OPLOCK_NOT_GRANTED cpu_to_le32(0xC00000E2)
+#define STATUS_INVALID_OPLOCK_PROTOCOL cpu_to_le32(0xC00000E3)
+#define STATUS_INTERNAL_DB_CORRUPTION cpu_to_le32(0xC00000E4)
+#define STATUS_INTERNAL_ERROR cpu_to_le32(0xC00000E5)
+#define STATUS_GENERIC_NOT_MAPPED cpu_to_le32(0xC00000E6)
+#define STATUS_BAD_DESCRIPTOR_FORMAT cpu_to_le32(0xC00000E7)
+#define STATUS_INVALID_USER_BUFFER cpu_to_le32(0xC00000E8)
+#define STATUS_UNEXPECTED_IO_ERROR cpu_to_le32(0xC00000E9)
+#define STATUS_UNEXPECTED_MM_CREATE_ERR cpu_to_le32(0xC00000EA)
+#define STATUS_UNEXPECTED_MM_MAP_ERROR cpu_to_le32(0xC00000EB)
+#define STATUS_UNEXPECTED_MM_EXTEND_ERR cpu_to_le32(0xC00000EC)
+#define STATUS_NOT_LOGON_PROCESS cpu_to_le32(0xC00000ED)
+#define STATUS_LOGON_SESSION_EXISTS cpu_to_le32(0xC00000EE)
+#define STATUS_INVALID_PARAMETER_1 cpu_to_le32(0xC00000EF)
+#define STATUS_INVALID_PARAMETER_2 cpu_to_le32(0xC00000F0)
+#define STATUS_INVALID_PARAMETER_3 cpu_to_le32(0xC00000F1)
+#define STATUS_INVALID_PARAMETER_4 cpu_to_le32(0xC00000F2)
+#define STATUS_INVALID_PARAMETER_5 cpu_to_le32(0xC00000F3)
+#define STATUS_INVALID_PARAMETER_6 cpu_to_le32(0xC00000F4)
+#define STATUS_INVALID_PARAMETER_7 cpu_to_le32(0xC00000F5)
+#define STATUS_INVALID_PARAMETER_8 cpu_to_le32(0xC00000F6)
+#define STATUS_INVALID_PARAMETER_9 cpu_to_le32(0xC00000F7)
+#define STATUS_INVALID_PARAMETER_10 cpu_to_le32(0xC00000F8)
+#define STATUS_INVALID_PARAMETER_11 cpu_to_le32(0xC00000F9)
+#define STATUS_INVALID_PARAMETER_12 cpu_to_le32(0xC00000FA)
+#define STATUS_REDIRECTOR_NOT_STARTED cpu_to_le32(0xC00000FB)
+#define STATUS_REDIRECTOR_STARTED cpu_to_le32(0xC00000FC)
+#define STATUS_STACK_OVERFLOW cpu_to_le32(0xC00000FD)
+#define STATUS_NO_SUCH_PACKAGE cpu_to_le32(0xC00000FE)
+#define STATUS_BAD_FUNCTION_TABLE cpu_to_le32(0xC00000FF)
+#define STATUS_VARIABLE_NOT_FOUND cpu_to_le32(0xC0000100)
+#define STATUS_DIRECTORY_NOT_EMPTY cpu_to_le32(0xC0000101)
+#define STATUS_FILE_CORRUPT_ERROR cpu_to_le32(0xC0000102)
+#define STATUS_NOT_A_DIRECTORY cpu_to_le32(0xC0000103)
+#define STATUS_BAD_LOGON_SESSION_STATE cpu_to_le32(0xC0000104)
+#define STATUS_LOGON_SESSION_COLLISION cpu_to_le32(0xC0000105)
+#define STATUS_NAME_TOO_LONG cpu_to_le32(0xC0000106)
+#define STATUS_FILES_OPEN cpu_to_le32(0xC0000107)
+#define STATUS_CONNECTION_IN_USE cpu_to_le32(0xC0000108)
+#define STATUS_MESSAGE_NOT_FOUND cpu_to_le32(0xC0000109)
+#define STATUS_PROCESS_IS_TERMINATING cpu_to_le32(0xC000010A)
+#define STATUS_INVALID_LOGON_TYPE cpu_to_le32(0xC000010B)
+#define STATUS_NO_GUID_TRANSLATION cpu_to_le32(0xC000010C)
+#define STATUS_CANNOT_IMPERSONATE cpu_to_le32(0xC000010D)
+#define STATUS_IMAGE_ALREADY_LOADED cpu_to_le32(0xC000010E)
+#define STATUS_ABIOS_NOT_PRESENT cpu_to_le32(0xC000010F)
+#define STATUS_ABIOS_LID_NOT_EXIST cpu_to_le32(0xC0000110)
+#define STATUS_ABIOS_LID_ALREADY_OWNED cpu_to_le32(0xC0000111)
+#define STATUS_ABIOS_NOT_LID_OWNER cpu_to_le32(0xC0000112)
+#define STATUS_ABIOS_INVALID_COMMAND cpu_to_le32(0xC0000113)
+#define STATUS_ABIOS_INVALID_LID cpu_to_le32(0xC0000114)
+#define STATUS_ABIOS_SELECTOR_NOT_AVAILABLE cpu_to_le32(0xC0000115)
+#define STATUS_ABIOS_INVALID_SELECTOR cpu_to_le32(0xC0000116)
+#define STATUS_NO_LDT cpu_to_le32(0xC0000117)
+#define STATUS_INVALID_LDT_SIZE cpu_to_le32(0xC0000118)
+#define STATUS_INVALID_LDT_OFFSET cpu_to_le32(0xC0000119)
+#define STATUS_INVALID_LDT_DESCRIPTOR cpu_to_le32(0xC000011A)
+#define STATUS_INVALID_IMAGE_NE_FORMAT cpu_to_le32(0xC000011B)
+#define STATUS_RXACT_INVALID_STATE cpu_to_le32(0xC000011C)
+#define STATUS_RXACT_COMMIT_FAILURE cpu_to_le32(0xC000011D)
+#define STATUS_MAPPED_FILE_SIZE_ZERO cpu_to_le32(0xC000011E)
+#define STATUS_TOO_MANY_OPENED_FILES cpu_to_le32(0xC000011F)
+#define STATUS_CANCELLED cpu_to_le32(0xC0000120)
+#define STATUS_CANNOT_DELETE cpu_to_le32(0xC0000121)
+#define STATUS_INVALID_COMPUTER_NAME cpu_to_le32(0xC0000122)
+#define STATUS_FILE_DELETED cpu_to_le32(0xC0000123)
+#define STATUS_SPECIAL_ACCOUNT cpu_to_le32(0xC0000124)
+#define STATUS_SPECIAL_GROUP cpu_to_le32(0xC0000125)
+#define STATUS_SPECIAL_USER cpu_to_le32(0xC0000126)
+#define STATUS_MEMBERS_PRIMARY_GROUP cpu_to_le32(0xC0000127)
+#define STATUS_FILE_CLOSED cpu_to_le32(0xC0000128)
+#define STATUS_TOO_MANY_THREADS cpu_to_le32(0xC0000129)
+#define STATUS_THREAD_NOT_IN_PROCESS cpu_to_le32(0xC000012A)
+#define STATUS_TOKEN_ALREADY_IN_USE cpu_to_le32(0xC000012B)
+#define STATUS_PAGEFILE_QUOTA_EXCEEDED cpu_to_le32(0xC000012C)
+#define STATUS_COMMITMENT_LIMIT cpu_to_le32(0xC000012D)
+#define STATUS_INVALID_IMAGE_LE_FORMAT cpu_to_le32(0xC000012E)
+#define STATUS_INVALID_IMAGE_NOT_MZ cpu_to_le32(0xC000012F)
+#define STATUS_INVALID_IMAGE_PROTECT cpu_to_le32(0xC0000130)
+#define STATUS_INVALID_IMAGE_WIN_16 cpu_to_le32(0xC0000131)
+#define STATUS_LOGON_SERVER_CONFLICT cpu_to_le32(0xC0000132)
+#define STATUS_TIME_DIFFERENCE_AT_DC cpu_to_le32(0xC0000133)
+#define STATUS_SYNCHRONIZATION_REQUIRED cpu_to_le32(0xC0000134)
+#define STATUS_DLL_NOT_FOUND cpu_to_le32(0xC0000135)
+#define STATUS_OPEN_FAILED cpu_to_le32(0xC0000136)
+#define STATUS_IO_PRIVILEGE_FAILED cpu_to_le32(0xC0000137)
+#define STATUS_ORDINAL_NOT_FOUND cpu_to_le32(0xC0000138)
+#define STATUS_ENTRYPOINT_NOT_FOUND cpu_to_le32(0xC0000139)
+#define STATUS_CONTROL_C_EXIT cpu_to_le32(0xC000013A)
+#define STATUS_LOCAL_DISCONNECT cpu_to_le32(0xC000013B)
+#define STATUS_REMOTE_DISCONNECT cpu_to_le32(0xC000013C)
+#define STATUS_REMOTE_RESOURCES cpu_to_le32(0xC000013D)
+#define STATUS_LINK_FAILED cpu_to_le32(0xC000013E)
+#define STATUS_LINK_TIMEOUT cpu_to_le32(0xC000013F)
+#define STATUS_INVALID_CONNECTION cpu_to_le32(0xC0000140)
+#define STATUS_INVALID_ADDRESS cpu_to_le32(0xC0000141)
+#define STATUS_DLL_INIT_FAILED cpu_to_le32(0xC0000142)
+#define STATUS_MISSING_SYSTEMFILE cpu_to_le32(0xC0000143)
+#define STATUS_UNHANDLED_EXCEPTION cpu_to_le32(0xC0000144)
+#define STATUS_APP_INIT_FAILURE cpu_to_le32(0xC0000145)
+#define STATUS_PAGEFILE_CREATE_FAILED cpu_to_le32(0xC0000146)
+#define STATUS_NO_PAGEFILE cpu_to_le32(0xC0000147)
+#define STATUS_INVALID_LEVEL cpu_to_le32(0xC0000148)
+#define STATUS_WRONG_PASSWORD_CORE cpu_to_le32(0xC0000149)
+#define STATUS_ILLEGAL_FLOAT_CONTEXT cpu_to_le32(0xC000014A)
+#define STATUS_PIPE_BROKEN cpu_to_le32(0xC000014B)
+#define STATUS_REGISTRY_CORRUPT cpu_to_le32(0xC000014C)
+#define STATUS_REGISTRY_IO_FAILED cpu_to_le32(0xC000014D)
+#define STATUS_NO_EVENT_PAIR cpu_to_le32(0xC000014E)
+#define STATUS_UNRECOGNIZED_VOLUME cpu_to_le32(0xC000014F)
+#define STATUS_SERIAL_NO_DEVICE_INITED cpu_to_le32(0xC0000150)
+#define STATUS_NO_SUCH_ALIAS cpu_to_le32(0xC0000151)
+#define STATUS_MEMBER_NOT_IN_ALIAS cpu_to_le32(0xC0000152)
+#define STATUS_MEMBER_IN_ALIAS cpu_to_le32(0xC0000153)
+#define STATUS_ALIAS_EXISTS cpu_to_le32(0xC0000154)
+#define STATUS_LOGON_NOT_GRANTED cpu_to_le32(0xC0000155)
+#define STATUS_TOO_MANY_SECRETS cpu_to_le32(0xC0000156)
+#define STATUS_SECRET_TOO_LONG cpu_to_le32(0xC0000157)
+#define STATUS_INTERNAL_DB_ERROR cpu_to_le32(0xC0000158)
+#define STATUS_FULLSCREEN_MODE cpu_to_le32(0xC0000159)
+#define STATUS_TOO_MANY_CONTEXT_IDS cpu_to_le32(0xC000015A)
+#define STATUS_LOGON_TYPE_NOT_GRANTED cpu_to_le32(0xC000015B)
+#define STATUS_NOT_REGISTRY_FILE cpu_to_le32(0xC000015C)
+#define STATUS_NT_CROSS_ENCRYPTION_REQUIRED cpu_to_le32(0xC000015D)
+#define STATUS_DOMAIN_CTRLR_CONFIG_ERROR cpu_to_le32(0xC000015E)
+#define STATUS_FT_MISSING_MEMBER cpu_to_le32(0xC000015F)
+#define STATUS_ILL_FORMED_SERVICE_ENTRY cpu_to_le32(0xC0000160)
+#define STATUS_ILLEGAL_CHARACTER cpu_to_le32(0xC0000161)
+#define STATUS_UNMAPPABLE_CHARACTER cpu_to_le32(0xC0000162)
+#define STATUS_UNDEFINED_CHARACTER cpu_to_le32(0xC0000163)
+#define STATUS_FLOPPY_VOLUME cpu_to_le32(0xC0000164)
+#define STATUS_FLOPPY_ID_MARK_NOT_FOUND cpu_to_le32(0xC0000165)
+#define STATUS_FLOPPY_WRONG_CYLINDER cpu_to_le32(0xC0000166)
+#define STATUS_FLOPPY_UNKNOWN_ERROR cpu_to_le32(0xC0000167)
+#define STATUS_FLOPPY_BAD_REGISTERS cpu_to_le32(0xC0000168)
+#define STATUS_DISK_RECALIBRATE_FAILED cpu_to_le32(0xC0000169)
+#define STATUS_DISK_OPERATION_FAILED cpu_to_le32(0xC000016A)
+#define STATUS_DISK_RESET_FAILED cpu_to_le32(0xC000016B)
+#define STATUS_SHARED_IRQ_BUSY cpu_to_le32(0xC000016C)
+#define STATUS_FT_ORPHANING cpu_to_le32(0xC000016D)
+#define STATUS_BIOS_FAILED_TO_CONNECT_INTERRUPT cpu_to_le32(0xC000016E)
+#define STATUS_PARTITION_FAILURE cpu_to_le32(0xC0000172)
+#define STATUS_INVALID_BLOCK_LENGTH cpu_to_le32(0xC0000173)
+#define STATUS_DEVICE_NOT_PARTITIONED cpu_to_le32(0xC0000174)
+#define STATUS_UNABLE_TO_LOCK_MEDIA cpu_to_le32(0xC0000175)
+#define STATUS_UNABLE_TO_UNLOAD_MEDIA cpu_to_le32(0xC0000176)
+#define STATUS_EOM_OVERFLOW cpu_to_le32(0xC0000177)
+#define STATUS_NO_MEDIA cpu_to_le32(0xC0000178)
+#define STATUS_NO_SUCH_MEMBER cpu_to_le32(0xC000017A)
+#define STATUS_INVALID_MEMBER cpu_to_le32(0xC000017B)
+#define STATUS_KEY_DELETED cpu_to_le32(0xC000017C)
+#define STATUS_NO_LOG_SPACE cpu_to_le32(0xC000017D)
+#define STATUS_TOO_MANY_SIDS cpu_to_le32(0xC000017E)
+#define STATUS_LM_CROSS_ENCRYPTION_REQUIRED cpu_to_le32(0xC000017F)
+#define STATUS_KEY_HAS_CHILDREN cpu_to_le32(0xC0000180)
+#define STATUS_CHILD_MUST_BE_VOLATILE cpu_to_le32(0xC0000181)
+#define STATUS_DEVICE_CONFIGURATION_ERROR cpu_to_le32(0xC0000182)
+#define STATUS_DRIVER_INTERNAL_ERROR cpu_to_le32(0xC0000183)
+#define STATUS_INVALID_DEVICE_STATE cpu_to_le32(0xC0000184)
+#define STATUS_IO_DEVICE_ERROR cpu_to_le32(0xC0000185)
+#define STATUS_DEVICE_PROTOCOL_ERROR cpu_to_le32(0xC0000186)
+#define STATUS_BACKUP_CONTROLLER cpu_to_le32(0xC0000187)
+#define STATUS_LOG_FILE_FULL cpu_to_le32(0xC0000188)
+#define STATUS_TOO_LATE cpu_to_le32(0xC0000189)
+#define STATUS_NO_TRUST_LSA_SECRET cpu_to_le32(0xC000018A)
+#define STATUS_NO_TRUST_SAM_ACCOUNT cpu_to_le32(0xC000018B)
+#define STATUS_TRUSTED_DOMAIN_FAILURE cpu_to_le32(0xC000018C)
+#define STATUS_TRUSTED_RELATIONSHIP_FAILURE cpu_to_le32(0xC000018D)
+#define STATUS_EVENTLOG_FILE_CORRUPT cpu_to_le32(0xC000018E)
+#define STATUS_EVENTLOG_CANT_START cpu_to_le32(0xC000018F)
+#define STATUS_TRUST_FAILURE cpu_to_le32(0xC0000190)
+#define STATUS_MUTANT_LIMIT_EXCEEDED cpu_to_le32(0xC0000191)
+#define STATUS_NETLOGON_NOT_STARTED cpu_to_le32(0xC0000192)
+#define STATUS_ACCOUNT_EXPIRED cpu_to_le32(0xC0000193)
+#define STATUS_POSSIBLE_DEADLOCK cpu_to_le32(0xC0000194)
+#define STATUS_NETWORK_CREDENTIAL_CONFLICT cpu_to_le32(0xC0000195)
+#define STATUS_REMOTE_SESSION_LIMIT cpu_to_le32(0xC0000196)
+#define STATUS_EVENTLOG_FILE_CHANGED cpu_to_le32(0xC0000197)
+#define STATUS_NOLOGON_INTERDOMAIN_TRUST_ACCOUNT cpu_to_le32(0xC0000198)
+#define STATUS_NOLOGON_WORKSTATION_TRUST_ACCOUNT cpu_to_le32(0xC0000199)
+#define STATUS_NOLOGON_SERVER_TRUST_ACCOUNT cpu_to_le32(0xC000019A)
+#define STATUS_DOMAIN_TRUST_INCONSISTENT cpu_to_le32(0xC000019B)
+#define STATUS_FS_DRIVER_REQUIRED cpu_to_le32(0xC000019C)
+#define STATUS_IMAGE_ALREADY_LOADED_AS_DLL cpu_to_le32(0xC000019D)
+#define STATUS_NETWORK_OPEN_RESTRICTION cpu_to_le32(0xC0000201)
+#define STATUS_NO_USER_SESSION_KEY cpu_to_le32(0xC0000202)
+#define STATUS_USER_SESSION_DELETED cpu_to_le32(0xC0000203)
+#define STATUS_RESOURCE_LANG_NOT_FOUND cpu_to_le32(0xC0000204)
+#define STATUS_INSUFF_SERVER_RESOURCES cpu_to_le32(0xC0000205)
+#define STATUS_INVALID_BUFFER_SIZE cpu_to_le32(0xC0000206)
+#define STATUS_INVALID_ADDRESS_COMPONENT cpu_to_le32(0xC0000207)
+#define STATUS_INVALID_ADDRESS_WILDCARD cpu_to_le32(0xC0000208)
+#define STATUS_TOO_MANY_ADDRESSES cpu_to_le32(0xC0000209)
+#define STATUS_ADDRESS_ALREADY_EXISTS cpu_to_le32(0xC000020A)
+#define STATUS_ADDRESS_CLOSED cpu_to_le32(0xC000020B)
+#define STATUS_CONNECTION_DISCONNECTED cpu_to_le32(0xC000020C)
+#define STATUS_CONNECTION_RESET cpu_to_le32(0xC000020D)
+#define STATUS_TOO_MANY_NODES cpu_to_le32(0xC000020E)
+#define STATUS_TRANSACTION_ABORTED cpu_to_le32(0xC000020F)
+#define STATUS_TRANSACTION_TIMED_OUT cpu_to_le32(0xC0000210)
+#define STATUS_TRANSACTION_NO_RELEASE cpu_to_le32(0xC0000211)
+#define STATUS_TRANSACTION_NO_MATCH cpu_to_le32(0xC0000212)
+#define STATUS_TRANSACTION_RESPONDED cpu_to_le32(0xC0000213)
+#define STATUS_TRANSACTION_INVALID_ID cpu_to_le32(0xC0000214)
+#define STATUS_TRANSACTION_INVALID_TYPE cpu_to_le32(0xC0000215)
+#define STATUS_NOT_SERVER_SESSION cpu_to_le32(0xC0000216)
+#define STATUS_NOT_CLIENT_SESSION cpu_to_le32(0xC0000217)
+#define STATUS_CANNOT_LOAD_REGISTRY_FILE cpu_to_le32(0xC0000218)
+#define STATUS_DEBUG_ATTACH_FAILED cpu_to_le32(0xC0000219)
+#define STATUS_SYSTEM_PROCESS_TERMINATED cpu_to_le32(0xC000021A)
+#define STATUS_DATA_NOT_ACCEPTED cpu_to_le32(0xC000021B)
+#define STATUS_NO_BROWSER_SERVERS_FOUND cpu_to_le32(0xC000021C)
+#define STATUS_VDM_HARD_ERROR cpu_to_le32(0xC000021D)
+#define STATUS_DRIVER_CANCEL_TIMEOUT cpu_to_le32(0xC000021E)
+#define STATUS_REPLY_MESSAGE_MISMATCH cpu_to_le32(0xC000021F)
+#define STATUS_MAPPED_ALIGNMENT cpu_to_le32(0xC0000220)
+#define STATUS_IMAGE_CHECKSUM_MISMATCH cpu_to_le32(0xC0000221)
+#define STATUS_LOST_WRITEBEHIND_DATA cpu_to_le32(0xC0000222)
+#define STATUS_CLIENT_SERVER_PARAMETERS_INVALID cpu_to_le32(0xC0000223)
+#define STATUS_PASSWORD_MUST_CHANGE cpu_to_le32(0xC0000224)
+#define STATUS_NOT_FOUND cpu_to_le32(0xC0000225)
+#define STATUS_NOT_TINY_STREAM cpu_to_le32(0xC0000226)
+#define STATUS_RECOVERY_FAILURE cpu_to_le32(0xC0000227)
+#define STATUS_STACK_OVERFLOW_READ cpu_to_le32(0xC0000228)
+#define STATUS_FAIL_CHECK cpu_to_le32(0xC0000229)
+#define STATUS_DUPLICATE_OBJECTID cpu_to_le32(0xC000022A)
+#define STATUS_OBJECTID_EXISTS cpu_to_le32(0xC000022B)
+#define STATUS_CONVERT_TO_LARGE cpu_to_le32(0xC000022C)
+#define STATUS_RETRY cpu_to_le32(0xC000022D)
+#define STATUS_FOUND_OUT_OF_SCOPE cpu_to_le32(0xC000022E)
+#define STATUS_ALLOCATE_BUCKET cpu_to_le32(0xC000022F)
+#define STATUS_PROPSET_NOT_FOUND cpu_to_le32(0xC0000230)
+#define STATUS_MARSHALL_OVERFLOW cpu_to_le32(0xC0000231)
+#define STATUS_INVALID_VARIANT cpu_to_le32(0xC0000232)
+#define STATUS_DOMAIN_CONTROLLER_NOT_FOUND cpu_to_le32(0xC0000233)
+#define STATUS_ACCOUNT_LOCKED_OUT cpu_to_le32(0xC0000234)
+#define STATUS_HANDLE_NOT_CLOSABLE cpu_to_le32(0xC0000235)
+#define STATUS_CONNECTION_REFUSED cpu_to_le32(0xC0000236)
+#define STATUS_GRACEFUL_DISCONNECT cpu_to_le32(0xC0000237)
+#define STATUS_ADDRESS_ALREADY_ASSOCIATED cpu_to_le32(0xC0000238)
+#define STATUS_ADDRESS_NOT_ASSOCIATED cpu_to_le32(0xC0000239)
+#define STATUS_CONNECTION_INVALID cpu_to_le32(0xC000023A)
+#define STATUS_CONNECTION_ACTIVE cpu_to_le32(0xC000023B)
+#define STATUS_NETWORK_UNREACHABLE cpu_to_le32(0xC000023C)
+#define STATUS_HOST_UNREACHABLE cpu_to_le32(0xC000023D)
+#define STATUS_PROTOCOL_UNREACHABLE cpu_to_le32(0xC000023E)
+#define STATUS_PORT_UNREACHABLE cpu_to_le32(0xC000023F)
+#define STATUS_REQUEST_ABORTED cpu_to_le32(0xC0000240)
+#define STATUS_CONNECTION_ABORTED cpu_to_le32(0xC0000241)
+#define STATUS_BAD_COMPRESSION_BUFFER cpu_to_le32(0xC0000242)
+#define STATUS_USER_MAPPED_FILE cpu_to_le32(0xC0000243)
+#define STATUS_AUDIT_FAILED cpu_to_le32(0xC0000244)
+#define STATUS_TIMER_RESOLUTION_NOT_SET cpu_to_le32(0xC0000245)
+#define STATUS_CONNECTION_COUNT_LIMIT cpu_to_le32(0xC0000246)
+#define STATUS_LOGIN_TIME_RESTRICTION cpu_to_le32(0xC0000247)
+#define STATUS_LOGIN_WKSTA_RESTRICTION cpu_to_le32(0xC0000248)
+#define STATUS_IMAGE_MP_UP_MISMATCH cpu_to_le32(0xC0000249)
+#define STATUS_INSUFFICIENT_LOGON_INFO cpu_to_le32(0xC0000250)
+#define STATUS_BAD_DLL_ENTRYPOINT cpu_to_le32(0xC0000251)
+#define STATUS_BAD_SERVICE_ENTRYPOINT cpu_to_le32(0xC0000252)
+#define STATUS_LPC_REPLY_LOST cpu_to_le32(0xC0000253)
+#define STATUS_IP_ADDRESS_CONFLICT1 cpu_to_le32(0xC0000254)
+#define STATUS_IP_ADDRESS_CONFLICT2 cpu_to_le32(0xC0000255)
+#define STATUS_REGISTRY_QUOTA_LIMIT cpu_to_le32(0xC0000256)
+#define STATUS_PATH_NOT_COVERED cpu_to_le32(0xC0000257)
+#define STATUS_NO_CALLBACK_ACTIVE cpu_to_le32(0xC0000258)
+#define STATUS_LICENSE_QUOTA_EXCEEDED cpu_to_le32(0xC0000259)
+#define STATUS_PWD_TOO_SHORT cpu_to_le32(0xC000025A)
+#define STATUS_PWD_TOO_RECENT cpu_to_le32(0xC000025B)
+#define STATUS_PWD_HISTORY_CONFLICT cpu_to_le32(0xC000025C)
+#define STATUS_PLUGPLAY_NO_DEVICE cpu_to_le32(0xC000025E)
+#define STATUS_UNSUPPORTED_COMPRESSION cpu_to_le32(0xC000025F)
+#define STATUS_INVALID_HW_PROFILE cpu_to_le32(0xC0000260)
+#define STATUS_INVALID_PLUGPLAY_DEVICE_PATH cpu_to_le32(0xC0000261)
+#define STATUS_DRIVER_ORDINAL_NOT_FOUND cpu_to_le32(0xC0000262)
+#define STATUS_DRIVER_ENTRYPOINT_NOT_FOUND cpu_to_le32(0xC0000263)
+#define STATUS_RESOURCE_NOT_OWNED cpu_to_le32(0xC0000264)
+#define STATUS_TOO_MANY_LINKS cpu_to_le32(0xC0000265)
+#define STATUS_QUOTA_LIST_INCONSISTENT cpu_to_le32(0xC0000266)
+#define STATUS_FILE_IS_OFFLINE cpu_to_le32(0xC0000267)
+#define STATUS_EVALUATION_EXPIRATION cpu_to_le32(0xC0000268)
+#define STATUS_ILLEGAL_DLL_RELOCATION cpu_to_le32(0xC0000269)
+#define STATUS_LICENSE_VIOLATION cpu_to_le32(0xC000026A)
+#define STATUS_DLL_INIT_FAILED_LOGOFF cpu_to_le32(0xC000026B)
+#define STATUS_DRIVER_UNABLE_TO_LOAD cpu_to_le32(0xC000026C)
+#define STATUS_DFS_UNAVAILABLE cpu_to_le32(0xC000026D)
+#define STATUS_VOLUME_DISMOUNTED cpu_to_le32(0xC000026E)
+#define STATUS_WX86_INTERNAL_ERROR cpu_to_le32(0xC000026F)
+#define STATUS_WX86_FLOAT_STACK_CHECK cpu_to_le32(0xC0000270)
+#define STATUS_VALIDATE_CONTINUE cpu_to_le32(0xC0000271)
+#define STATUS_NO_MATCH cpu_to_le32(0xC0000272)
+#define STATUS_NO_MORE_MATCHES cpu_to_le32(0xC0000273)
+#define STATUS_NOT_A_REPARSE_POINT cpu_to_le32(0xC0000275)
+#define STATUS_IO_REPARSE_TAG_INVALID cpu_to_le32(0xC0000276)
+#define STATUS_IO_REPARSE_TAG_MISMATCH cpu_to_le32(0xC0000277)
+#define STATUS_IO_REPARSE_DATA_INVALID cpu_to_le32(0xC0000278)
+#define STATUS_IO_REPARSE_TAG_NOT_HANDLED cpu_to_le32(0xC0000279)
+#define STATUS_REPARSE_POINT_NOT_RESOLVED cpu_to_le32(0xC0000280)
+#define STATUS_DIRECTORY_IS_A_REPARSE_POINT cpu_to_le32(0xC0000281)
+#define STATUS_RANGE_LIST_CONFLICT cpu_to_le32(0xC0000282)
+#define STATUS_SOURCE_ELEMENT_EMPTY cpu_to_le32(0xC0000283)
+#define STATUS_DESTINATION_ELEMENT_FULL cpu_to_le32(0xC0000284)
+#define STATUS_ILLEGAL_ELEMENT_ADDRESS cpu_to_le32(0xC0000285)
+#define STATUS_MAGAZINE_NOT_PRESENT cpu_to_le32(0xC0000286)
+#define STATUS_REINITIALIZATION_NEEDED cpu_to_le32(0xC0000287)
+#define STATUS_ENCRYPTION_FAILED cpu_to_le32(0xC000028A)
+#define STATUS_DECRYPTION_FAILED cpu_to_le32(0xC000028B)
+#define STATUS_RANGE_NOT_FOUND cpu_to_le32(0xC000028C)
+#define STATUS_NO_RECOVERY_POLICY cpu_to_le32(0xC000028D)
+#define STATUS_NO_EFS cpu_to_le32(0xC000028E)
+#define STATUS_WRONG_EFS cpu_to_le32(0xC000028F)
+#define STATUS_NO_USER_KEYS cpu_to_le32(0xC0000290)
+#define STATUS_FILE_NOT_ENCRYPTED cpu_to_le32(0xC0000291)
+#define STATUS_NOT_EXPORT_FORMAT cpu_to_le32(0xC0000292)
+#define STATUS_FILE_ENCRYPTED cpu_to_le32(0xC0000293)
+#define STATUS_WMI_GUID_NOT_FOUND cpu_to_le32(0xC0000295)
+#define STATUS_WMI_INSTANCE_NOT_FOUND cpu_to_le32(0xC0000296)
+#define STATUS_WMI_ITEMID_NOT_FOUND cpu_to_le32(0xC0000297)
+#define STATUS_WMI_TRY_AGAIN cpu_to_le32(0xC0000298)
+#define STATUS_SHARED_POLICY cpu_to_le32(0xC0000299)
+#define STATUS_POLICY_OBJECT_NOT_FOUND cpu_to_le32(0xC000029A)
+#define STATUS_POLICY_ONLY_IN_DS cpu_to_le32(0xC000029B)
+#define STATUS_VOLUME_NOT_UPGRADED cpu_to_le32(0xC000029C)
+#define STATUS_REMOTE_STORAGE_NOT_ACTIVE cpu_to_le32(0xC000029D)
+#define STATUS_REMOTE_STORAGE_MEDIA_ERROR cpu_to_le32(0xC000029E)
+#define STATUS_NO_TRACKING_SERVICE cpu_to_le32(0xC000029F)
+#define STATUS_SERVER_SID_MISMATCH cpu_to_le32(0xC00002A0)
+#define STATUS_DS_NO_ATTRIBUTE_OR_VALUE cpu_to_le32(0xC00002A1)
+#define STATUS_DS_INVALID_ATTRIBUTE_SYNTAX cpu_to_le32(0xC00002A2)
+#define STATUS_DS_ATTRIBUTE_TYPE_UNDEFINED cpu_to_le32(0xC00002A3)
+#define STATUS_DS_ATTRIBUTE_OR_VALUE_EXISTS cpu_to_le32(0xC00002A4)
+#define STATUS_DS_BUSY cpu_to_le32(0xC00002A5)
+#define STATUS_DS_UNAVAILABLE cpu_to_le32(0xC00002A6)
+#define STATUS_DS_NO_RIDS_ALLOCATED cpu_to_le32(0xC00002A7)
+#define STATUS_DS_NO_MORE_RIDS cpu_to_le32(0xC00002A8)
+#define STATUS_DS_INCORRECT_ROLE_OWNER cpu_to_le32(0xC00002A9)
+#define STATUS_DS_RIDMGR_INIT_ERROR cpu_to_le32(0xC00002AA)
+#define STATUS_DS_OBJ_CLASS_VIOLATION cpu_to_le32(0xC00002AB)
+#define STATUS_DS_CANT_ON_NON_LEAF cpu_to_le32(0xC00002AC)
+#define STATUS_DS_CANT_ON_RDN cpu_to_le32(0xC00002AD)
+#define STATUS_DS_CANT_MOD_OBJ_CLASS cpu_to_le32(0xC00002AE)
+#define STATUS_DS_CROSS_DOM_MOVE_FAILED cpu_to_le32(0xC00002AF)
+#define STATUS_DS_GC_NOT_AVAILABLE cpu_to_le32(0xC00002B0)
+#define STATUS_DIRECTORY_SERVICE_REQUIRED cpu_to_le32(0xC00002B1)
+#define STATUS_REPARSE_ATTRIBUTE_CONFLICT cpu_to_le32(0xC00002B2)
+#define STATUS_CANT_ENABLE_DENY_ONLY cpu_to_le32(0xC00002B3)
+#define STATUS_FLOAT_MULTIPLE_FAULTS cpu_to_le32(0xC00002B4)
+#define STATUS_FLOAT_MULTIPLE_TRAPS cpu_to_le32(0xC00002B5)
+#define STATUS_DEVICE_REMOVED cpu_to_le32(0xC00002B6)
+#define STATUS_JOURNAL_DELETE_IN_PROGRESS cpu_to_le32(0xC00002B7)
+#define STATUS_JOURNAL_NOT_ACTIVE cpu_to_le32(0xC00002B8)
+#define STATUS_NOINTERFACE cpu_to_le32(0xC00002B9)
+#define STATUS_DS_ADMIN_LIMIT_EXCEEDED cpu_to_le32(0xC00002C1)
+#define STATUS_DRIVER_FAILED_SLEEP cpu_to_le32(0xC00002C2)
+#define STATUS_MUTUAL_AUTHENTICATION_FAILED cpu_to_le32(0xC00002C3)
+#define STATUS_CORRUPT_SYSTEM_FILE cpu_to_le32(0xC00002C4)
+#define STATUS_DATATYPE_MISALIGNMENT_ERROR cpu_to_le32(0xC00002C5)
+#define STATUS_WMI_READ_ONLY cpu_to_le32(0xC00002C6)
+#define STATUS_WMI_SET_FAILURE cpu_to_le32(0xC00002C7)
+#define STATUS_COMMITMENT_MINIMUM cpu_to_le32(0xC00002C8)
+#define STATUS_REG_NAT_CONSUMPTION cpu_to_le32(0xC00002C9)
+#define STATUS_TRANSPORT_FULL cpu_to_le32(0xC00002CA)
+#define STATUS_DS_SAM_INIT_FAILURE cpu_to_le32(0xC00002CB)
+#define STATUS_ONLY_IF_CONNECTED cpu_to_le32(0xC00002CC)
+#define STATUS_DS_SENSITIVE_GROUP_VIOLATION cpu_to_le32(0xC00002CD)
+#define STATUS_PNP_RESTART_ENUMERATION cpu_to_le32(0xC00002CE)
+#define STATUS_JOURNAL_ENTRY_DELETED cpu_to_le32(0xC00002CF)
+#define STATUS_DS_CANT_MOD_PRIMARYGROUPID cpu_to_le32(0xC00002D0)
+#define STATUS_SYSTEM_IMAGE_BAD_SIGNATURE cpu_to_le32(0xC00002D1)
+#define STATUS_PNP_REBOOT_REQUIRED cpu_to_le32(0xC00002D2)
+#define STATUS_POWER_STATE_INVALID cpu_to_le32(0xC00002D3)
+#define STATUS_DS_INVALID_GROUP_TYPE cpu_to_le32(0xC00002D4)
+#define STATUS_DS_NO_NEST_GLOBALGROUP_IN_MIXEDDOMAIN cpu_to_le32(0xC00002D5)
+#define STATUS_DS_NO_NEST_LOCALGROUP_IN_MIXEDDOMAIN cpu_to_le32(0xC00002D6)
+#define STATUS_DS_GLOBAL_CANT_HAVE_LOCAL_MEMBER cpu_to_le32(0xC00002D7)
+#define STATUS_DS_GLOBAL_CANT_HAVE_UNIVERSAL_MEMBER cpu_to_le32(0xC00002D8)
+#define STATUS_DS_UNIVERSAL_CANT_HAVE_LOCAL_MEMBER cpu_to_le32(0xC00002D9)
+#define STATUS_DS_GLOBAL_CANT_HAVE_CROSSDOMAIN_MEMBER cpu_to_le32(0xC00002DA)
+#define STATUS_DS_LOCAL_CANT_HAVE_CROSSDOMAIN_LOCAL_MEMBER cpu_to_le32(0xC00002DB)
+#define STATUS_DS_HAVE_PRIMARY_MEMBERS cpu_to_le32(0xC00002DC)
+#define STATUS_WMI_NOT_SUPPORTED cpu_to_le32(0xC00002DD)
+#define STATUS_INSUFFICIENT_POWER cpu_to_le32(0xC00002DE)
+#define STATUS_SAM_NEED_BOOTKEY_PASSWORD cpu_to_le32(0xC00002DF)
+#define STATUS_SAM_NEED_BOOTKEY_FLOPPY cpu_to_le32(0xC00002E0)
+#define STATUS_DS_CANT_START cpu_to_le32(0xC00002E1)
+#define STATUS_DS_INIT_FAILURE cpu_to_le32(0xC00002E2)
+#define STATUS_SAM_INIT_FAILURE cpu_to_le32(0xC00002E3)
+#define STATUS_DS_GC_REQUIRED cpu_to_le32(0xC00002E4)
+#define STATUS_DS_LOCAL_MEMBER_OF_LOCAL_ONLY cpu_to_le32(0xC00002E5)
+#define STATUS_DS_NO_FPO_IN_UNIVERSAL_GROUPS cpu_to_le32(0xC00002E6)
+#define STATUS_DS_MACHINE_ACCOUNT_QUOTA_EXCEEDED cpu_to_le32(0xC00002E7)
+#define STATUS_MULTIPLE_FAULT_VIOLATION cpu_to_le32(0xC00002E8)
+#define STATUS_CURRENT_DOMAIN_NOT_ALLOWED cpu_to_le32(0xC00002E9)
+#define STATUS_CANNOT_MAKE cpu_to_le32(0xC00002EA)
+#define STATUS_SYSTEM_SHUTDOWN cpu_to_le32(0xC00002EB)
+#define STATUS_DS_INIT_FAILURE_CONSOLE cpu_to_le32(0xC00002EC)
+#define STATUS_DS_SAM_INIT_FAILURE_CONSOLE cpu_to_le32(0xC00002ED)
+#define STATUS_UNFINISHED_CONTEXT_DELETED cpu_to_le32(0xC00002EE)
+#define STATUS_NO_TGT_REPLY cpu_to_le32(0xC00002EF)
+#define STATUS_OBJECTID_NOT_FOUND cpu_to_le32(0xC00002F0)
+#define STATUS_NO_IP_ADDRESSES cpu_to_le32(0xC00002F1)
+#define STATUS_WRONG_CREDENTIAL_HANDLE cpu_to_le32(0xC00002F2)
+#define STATUS_CRYPTO_SYSTEM_INVALID cpu_to_le32(0xC00002F3)
+#define STATUS_MAX_REFERRALS_EXCEEDED cpu_to_le32(0xC00002F4)
+#define STATUS_MUST_BE_KDC cpu_to_le32(0xC00002F5)
+#define STATUS_STRONG_CRYPTO_NOT_SUPPORTED cpu_to_le32(0xC00002F6)
+#define STATUS_TOO_MANY_PRINCIPALS cpu_to_le32(0xC00002F7)
+#define STATUS_NO_PA_DATA cpu_to_le32(0xC00002F8)
+#define STATUS_PKINIT_NAME_MISMATCH cpu_to_le32(0xC00002F9)
+#define STATUS_SMARTCARD_LOGON_REQUIRED cpu_to_le32(0xC00002FA)
+#define STATUS_KDC_INVALID_REQUEST cpu_to_le32(0xC00002FB)
+#define STATUS_KDC_UNABLE_TO_REFER cpu_to_le32(0xC00002FC)
+#define STATUS_KDC_UNKNOWN_ETYPE cpu_to_le32(0xC00002FD)
+#define STATUS_SHUTDOWN_IN_PROGRESS cpu_to_le32(0xC00002FE)
+#define STATUS_SERVER_SHUTDOWN_IN_PROGRESS cpu_to_le32(0xC00002FF)
+#define STATUS_NOT_SUPPORTED_ON_SBS cpu_to_le32(0xC0000300)
+#define STATUS_WMI_GUID_DISCONNECTED cpu_to_le32(0xC0000301)
+#define STATUS_WMI_ALREADY_DISABLED cpu_to_le32(0xC0000302)
+#define STATUS_WMI_ALREADY_ENABLED cpu_to_le32(0xC0000303)
+#define STATUS_MFT_TOO_FRAGMENTED cpu_to_le32(0xC0000304)
+#define STATUS_COPY_PROTECTION_FAILURE cpu_to_le32(0xC0000305)
+#define STATUS_CSS_AUTHENTICATION_FAILURE cpu_to_le32(0xC0000306)
+#define STATUS_CSS_KEY_NOT_PRESENT cpu_to_le32(0xC0000307)
+#define STATUS_CSS_KEY_NOT_ESTABLISHED cpu_to_le32(0xC0000308)
+#define STATUS_CSS_SCRAMBLED_SECTOR cpu_to_le32(0xC0000309)
+#define STATUS_CSS_REGION_MISMATCH cpu_to_le32(0xC000030A)
+#define STATUS_CSS_RESETS_EXHAUSTED cpu_to_le32(0xC000030B)
+#define STATUS_PKINIT_FAILURE cpu_to_le32(0xC0000320)
+#define STATUS_SMARTCARD_SUBSYSTEM_FAILURE cpu_to_le32(0xC0000321)
+#define STATUS_NO_KERB_KEY cpu_to_le32(0xC0000322)
+#define STATUS_HOST_DOWN cpu_to_le32(0xC0000350)
+#define STATUS_UNSUPPORTED_PREAUTH cpu_to_le32(0xC0000351)
+#define STATUS_EFS_ALG_BLOB_TOO_BIG cpu_to_le32(0xC0000352)
+#define STATUS_PORT_NOT_SET cpu_to_le32(0xC0000353)
+#define STATUS_DEBUGGER_INACTIVE cpu_to_le32(0xC0000354)
+#define STATUS_DS_VERSION_CHECK_FAILURE cpu_to_le32(0xC0000355)
+#define STATUS_AUDITING_DISABLED cpu_to_le32(0xC0000356)
+#define STATUS_PRENT4_MACHINE_ACCOUNT cpu_to_le32(0xC0000357)
+#define STATUS_DS_AG_CANT_HAVE_UNIVERSAL_MEMBER cpu_to_le32(0xC0000358)
+#define STATUS_INVALID_IMAGE_WIN_32 cpu_to_le32(0xC0000359)
+#define STATUS_INVALID_IMAGE_WIN_64 cpu_to_le32(0xC000035A)
+#define STATUS_BAD_BINDINGS cpu_to_le32(0xC000035B)
+#define STATUS_NETWORK_SESSION_EXPIRED cpu_to_le32(0xC000035C)
+#define STATUS_APPHELP_BLOCK cpu_to_le32(0xC000035D)
+#define STATUS_ALL_SIDS_FILTERED cpu_to_le32(0xC000035E)
+#define STATUS_NOT_SAFE_MODE_DRIVER cpu_to_le32(0xC000035F)
+#define STATUS_ACCESS_DISABLED_BY_POLICY_DEFAULT cpu_to_le32(0xC0000361)
+#define STATUS_ACCESS_DISABLED_BY_POLICY_PATH cpu_to_le32(0xC0000362)
+#define STATUS_ACCESS_DISABLED_BY_POLICY_PUBLISHER cpu_to_le32(0xC0000363)
+#define STATUS_ACCESS_DISABLED_BY_POLICY_OTHER cpu_to_le32(0xC0000364)
+#define STATUS_FAILED_DRIVER_ENTRY cpu_to_le32(0xC0000365)
+#define STATUS_DEVICE_ENUMERATION_ERROR cpu_to_le32(0xC0000366)
+#define STATUS_MOUNT_POINT_NOT_RESOLVED cpu_to_le32(0xC0000368)
+#define STATUS_INVALID_DEVICE_OBJECT_PARAMETER cpu_to_le32(0xC0000369)
+#define STATUS_MCA_OCCURED cpu_to_le32(0xC000036A)
+#define STATUS_DRIVER_BLOCKED_CRITICAL cpu_to_le32(0xC000036B)
+#define STATUS_DRIVER_BLOCKED cpu_to_le32(0xC000036C)
+#define STATUS_DRIVER_DATABASE_ERROR cpu_to_le32(0xC000036D)
+#define STATUS_SYSTEM_HIVE_TOO_LARGE cpu_to_le32(0xC000036E)
+#define STATUS_INVALID_IMPORT_OF_NON_DLL cpu_to_le32(0xC000036F)
+#define STATUS_NO_SECRETS cpu_to_le32(0xC0000371)
+#define STATUS_ACCESS_DISABLED_NO_SAFER_UI_BY_POLICY cpu_to_le32(0xC0000372)
+#define STATUS_FAILED_STACK_SWITCH cpu_to_le32(0xC0000373)
+#define STATUS_HEAP_CORRUPTION cpu_to_le32(0xC0000374)
+#define STATUS_SMARTCARD_WRONG_PIN cpu_to_le32(0xC0000380)
+#define STATUS_SMARTCARD_CARD_BLOCKED cpu_to_le32(0xC0000381)
+#define STATUS_SMARTCARD_CARD_NOT_AUTHENTICATED cpu_to_le32(0xC0000382)
+#define STATUS_SMARTCARD_NO_CARD cpu_to_le32(0xC0000383)
+#define STATUS_SMARTCARD_NO_KEY_CONTAINER cpu_to_le32(0xC0000384)
+#define STATUS_SMARTCARD_NO_CERTIFICATE cpu_to_le32(0xC0000385)
+#define STATUS_SMARTCARD_NO_KEYSET cpu_to_le32(0xC0000386)
+#define STATUS_SMARTCARD_IO_ERROR cpu_to_le32(0xC0000387)
+#define STATUS_DOWNGRADE_DETECTED cpu_to_le32(0xC0000388)
+#define STATUS_SMARTCARD_CERT_REVOKED cpu_to_le32(0xC0000389)
+#define STATUS_ISSUING_CA_UNTRUSTED cpu_to_le32(0xC000038A)
+#define STATUS_REVOCATION_OFFLINE_C cpu_to_le32(0xC000038B)
+#define STATUS_PKINIT_CLIENT_FAILURE cpu_to_le32(0xC000038C)
+#define STATUS_SMARTCARD_CERT_EXPIRED cpu_to_le32(0xC000038D)
+#define STATUS_DRIVER_FAILED_PRIOR_UNLOAD cpu_to_le32(0xC000038E)
+#define STATUS_SMARTCARD_SILENT_CONTEXT cpu_to_le32(0xC000038F)
+#define STATUS_PER_USER_TRUST_QUOTA_EXCEEDED cpu_to_le32(0xC0000401)
+#define STATUS_ALL_USER_TRUST_QUOTA_EXCEEDED cpu_to_le32(0xC0000402)
+#define STATUS_USER_DELETE_TRUST_QUOTA_EXCEEDED cpu_to_le32(0xC0000403)
+#define STATUS_DS_NAME_NOT_UNIQUE cpu_to_le32(0xC0000404)
+#define STATUS_DS_DUPLICATE_ID_FOUND cpu_to_le32(0xC0000405)
+#define STATUS_DS_GROUP_CONVERSION_ERROR cpu_to_le32(0xC0000406)
+#define STATUS_VOLSNAP_PREPARE_HIBERNATE cpu_to_le32(0xC0000407)
+#define STATUS_USER2USER_REQUIRED cpu_to_le32(0xC0000408)
+#define STATUS_STACK_BUFFER_OVERRUN cpu_to_le32(0xC0000409)
+#define STATUS_NO_S4U_PROT_SUPPORT cpu_to_le32(0xC000040A)
+#define STATUS_CROSSREALM_DELEGATION_FAILURE cpu_to_le32(0xC000040B)
+#define STATUS_REVOCATION_OFFLINE_KDC cpu_to_le32(0xC000040C)
+#define STATUS_ISSUING_CA_UNTRUSTED_KDC cpu_to_le32(0xC000040D)
+#define STATUS_KDC_CERT_EXPIRED cpu_to_le32(0xC000040E)
+#define STATUS_KDC_CERT_REVOKED cpu_to_le32(0xC000040F)
+#define STATUS_PARAMETER_QUOTA_EXCEEDED cpu_to_le32(0xC0000410)
+#define STATUS_HIBERNATION_FAILURE cpu_to_le32(0xC0000411)
+#define STATUS_DELAY_LOAD_FAILED cpu_to_le32(0xC0000412)
+#define STATUS_AUTHENTICATION_FIREWALL_FAILED cpu_to_le32(0xC0000413)
+#define STATUS_VDM_DISALLOWED cpu_to_le32(0xC0000414)
+#define STATUS_HUNG_DISPLAY_DRIVER_THREAD cpu_to_le32(0xC0000415)
+#define STATUS_INSUFFICIENT_RESOURCE_FOR_SPECIFIED_SHARED_SECTION_SIZE cpu_to_le32(0xC0000416)
+#define STATUS_INVALID_CRUNTIME_PARAMETER cpu_to_le32(0xC0000417)
+#define STATUS_NTLM_BLOCKED cpu_to_le32(0xC0000418)
+#define STATUS_ASSERTION_FAILURE cpu_to_le32(0xC0000420)
+#define STATUS_VERIFIER_STOP cpu_to_le32(0xC0000421)
+#define STATUS_CALLBACK_POP_STACK cpu_to_le32(0xC0000423)
+#define STATUS_INCOMPATIBLE_DRIVER_BLOCKED cpu_to_le32(0xC0000424)
+#define STATUS_HIVE_UNLOADED cpu_to_le32(0xC0000425)
+#define STATUS_COMPRESSION_DISABLED cpu_to_le32(0xC0000426)
+#define STATUS_FILE_SYSTEM_LIMITATION cpu_to_le32(0xC0000427)
+#define STATUS_INVALID_IMAGE_HASH cpu_to_le32(0xC0000428)
+#define STATUS_NOT_CAPABLE cpu_to_le32(0xC0000429)
+#define STATUS_REQUEST_OUT_OF_SEQUENCE cpu_to_le32(0xC000042A)
+#define STATUS_IMPLEMENTATION_LIMIT cpu_to_le32(0xC000042B)
+#define STATUS_ELEVATION_REQUIRED cpu_to_le32(0xC000042C)
+#define STATUS_BEYOND_VDL cpu_to_le32(0xC0000432)
+#define STATUS_ENCOUNTERED_WRITE_IN_PROGRESS cpu_to_le32(0xC0000433)
+#define STATUS_PTE_CHANGED cpu_to_le32(0xC0000434)
+#define STATUS_PURGE_FAILED cpu_to_le32(0xC0000435)
+#define STATUS_CRED_REQUIRES_CONFIRMATION cpu_to_le32(0xC0000440)
+#define STATUS_CS_ENCRYPTION_INVALID_SERVER_RESPONSE cpu_to_le32(0xC0000441)
+#define STATUS_CS_ENCRYPTION_UNSUPPORTED_SERVER cpu_to_le32(0xC0000442)
+#define STATUS_CS_ENCRYPTION_EXISTING_ENCRYPTED_FILE cpu_to_le32(0xC0000443)
+#define STATUS_CS_ENCRYPTION_NEW_ENCRYPTED_FILE cpu_to_le32(0xC0000444)
+#define STATUS_CS_ENCRYPTION_FILE_NOT_CSE cpu_to_le32(0xC0000445)
+#define STATUS_INVALID_LABEL cpu_to_le32(0xC0000446)
+#define STATUS_DRIVER_PROCESS_TERMINATED cpu_to_le32(0xC0000450)
+#define STATUS_AMBIGUOUS_SYSTEM_DEVICE cpu_to_le32(0xC0000451)
+#define STATUS_SYSTEM_DEVICE_NOT_FOUND cpu_to_le32(0xC0000452)
+#define STATUS_RESTART_BOOT_APPLICATION cpu_to_le32(0xC0000453)
+#define STATUS_INVALID_TASK_NAME cpu_to_le32(0xC0000500)
+#define STATUS_INVALID_TASK_INDEX cpu_to_le32(0xC0000501)
+#define STATUS_THREAD_ALREADY_IN_TASK cpu_to_le32(0xC0000502)
+#define STATUS_CALLBACK_BYPASS cpu_to_le32(0xC0000503)
+#define STATUS_PORT_CLOSED cpu_to_le32(0xC0000700)
+#define STATUS_MESSAGE_LOST cpu_to_le32(0xC0000701)
+#define STATUS_INVALID_MESSAGE cpu_to_le32(0xC0000702)
+#define STATUS_REQUEST_CANCELED cpu_to_le32(0xC0000703)
+#define STATUS_RECURSIVE_DISPATCH cpu_to_le32(0xC0000704)
+#define STATUS_LPC_RECEIVE_BUFFER_EXPECTED cpu_to_le32(0xC0000705)
+#define STATUS_LPC_INVALID_CONNECTION_USAGE cpu_to_le32(0xC0000706)
+#define STATUS_LPC_REQUESTS_NOT_ALLOWED cpu_to_le32(0xC0000707)
+#define STATUS_RESOURCE_IN_USE cpu_to_le32(0xC0000708)
+#define STATUS_HARDWARE_MEMORY_ERROR cpu_to_le32(0xC0000709)
+#define STATUS_THREADPOOL_HANDLE_EXCEPTION cpu_to_le32(0xC000070A)
+#define STATUS_THREADPOOL_SET_EVENT_ON_COMPLETION_FAILED cpu_to_le32(0xC000070B)
+#define STATUS_THREADPOOL_RELEASE_SEMAPHORE_ON_COMPLETION_FAILED cpu_to_le32(0xC000070C)
+#define STATUS_THREADPOOL_RELEASE_MUTEX_ON_COMPLETION_FAILED cpu_to_le32(0xC000070D)
+#define STATUS_THREADPOOL_FREE_LIBRARY_ON_COMPLETION_FAILED cpu_to_le32(0xC000070E)
+#define STATUS_THREADPOOL_RELEASED_DURING_OPERATION cpu_to_le32(0xC000070F)
+#define STATUS_CALLBACK_RETURNED_WHILE_IMPERSONATING cpu_to_le32(0xC0000710)
+#define STATUS_APC_RETURNED_WHILE_IMPERSONATING cpu_to_le32(0xC0000711)
+#define STATUS_PROCESS_IS_PROTECTED cpu_to_le32(0xC0000712)
+#define STATUS_MCA_EXCEPTION cpu_to_le32(0xC0000713)
+#define STATUS_CERTIFICATE_MAPPING_NOT_UNIQUE cpu_to_le32(0xC0000714)
+#define STATUS_SYMLINK_CLASS_DISABLED cpu_to_le32(0xC0000715)
+#define STATUS_INVALID_IDN_NORMALIZATION cpu_to_le32(0xC0000716)
+#define STATUS_NO_UNICODE_TRANSLATION cpu_to_le32(0xC0000717)
+#define STATUS_ALREADY_REGISTERED cpu_to_le32(0xC0000718)
+#define STATUS_CONTEXT_MISMATCH cpu_to_le32(0xC0000719)
+#define STATUS_PORT_ALREADY_HAS_COMPLETION_LIST cpu_to_le32(0xC000071A)
+#define STATUS_CALLBACK_RETURNED_THREAD_PRIORITY cpu_to_le32(0xC000071B)
+#define STATUS_INVALID_THREAD cpu_to_le32(0xC000071C)
+#define STATUS_CALLBACK_RETURNED_TRANSACTION cpu_to_le32(0xC000071D)
+#define STATUS_CALLBACK_RETURNED_LDR_LOCK cpu_to_le32(0xC000071E)
+#define STATUS_CALLBACK_RETURNED_LANG cpu_to_le32(0xC000071F)
+#define STATUS_CALLBACK_RETURNED_PRI_BACK cpu_to_le32(0xC0000720)
+#define STATUS_CALLBACK_RETURNED_THREAD_AFFINITY cpu_to_le32(0xC0000721)
+#define STATUS_DISK_REPAIR_DISABLED cpu_to_le32(0xC0000800)
+#define STATUS_DS_DOMAIN_RENAME_IN_PROGRESS cpu_to_le32(0xC0000801)
+#define STATUS_DISK_QUOTA_EXCEEDED cpu_to_le32(0xC0000802)
+#define STATUS_CONTENT_BLOCKED cpu_to_le32(0xC0000804)
+#define STATUS_BAD_CLUSTERS cpu_to_le32(0xC0000805)
+#define STATUS_VOLUME_DIRTY cpu_to_le32(0xC0000806)
+#define STATUS_FILE_CHECKED_OUT cpu_to_le32(0xC0000901)
+#define STATUS_CHECKOUT_REQUIRED cpu_to_le32(0xC0000902)
+#define STATUS_BAD_FILE_TYPE cpu_to_le32(0xC0000903)
+#define STATUS_FILE_TOO_LARGE cpu_to_le32(0xC0000904)
+#define STATUS_FORMS_AUTH_REQUIRED cpu_to_le32(0xC0000905)
+#define STATUS_VIRUS_INFECTED cpu_to_le32(0xC0000906)
+#define STATUS_VIRUS_DELETED cpu_to_le32(0xC0000907)
+#define STATUS_BAD_MCFG_TABLE cpu_to_le32(0xC0000908)
+#define STATUS_WOW_ASSERTION cpu_to_le32(0xC0009898)
+#define STATUS_INVALID_SIGNATURE cpu_to_le32(0xC000A000)
+#define STATUS_HMAC_NOT_SUPPORTED cpu_to_le32(0xC000A001)
+#define STATUS_IPSEC_QUEUE_OVERFLOW cpu_to_le32(0xC000A010)
+#define STATUS_ND_QUEUE_OVERFLOW cpu_to_le32(0xC000A011)
+#define STATUS_HOPLIMIT_EXCEEDED cpu_to_le32(0xC000A012)
+#define STATUS_PROTOCOL_NOT_SUPPORTED cpu_to_le32(0xC000A013)
+#define STATUS_LOST_WRITEBEHIND_DATA_NETWORK_DISCONNECTED cpu_to_le32(0xC000A080)
+#define STATUS_LOST_WRITEBEHIND_DATA_NETWORK_SERVER_ERROR cpu_to_le32(0xC000A081)
+#define STATUS_LOST_WRITEBEHIND_DATA_LOCAL_DISK_ERROR cpu_to_le32(0xC000A082)
+#define STATUS_XML_PARSE_ERROR cpu_to_le32(0xC000A083)
+#define STATUS_XMLDSIG_ERROR cpu_to_le32(0xC000A084)
+#define STATUS_WRONG_COMPARTMENT cpu_to_le32(0xC000A085)
+#define STATUS_AUTHIP_FAILURE cpu_to_le32(0xC000A086)
+#define DBG_NO_STATE_CHANGE cpu_to_le32(0xC0010001)
+#define DBG_APP_NOT_IDLE cpu_to_le32(0xC0010002)
+#define RPC_NT_INVALID_STRING_BINDING cpu_to_le32(0xC0020001)
+#define RPC_NT_WRONG_KIND_OF_BINDING cpu_to_le32(0xC0020002)
+#define RPC_NT_INVALID_BINDING cpu_to_le32(0xC0020003)
+#define RPC_NT_PROTSEQ_NOT_SUPPORTED cpu_to_le32(0xC0020004)
+#define RPC_NT_INVALID_RPC_PROTSEQ cpu_to_le32(0xC0020005)
+#define RPC_NT_INVALID_STRING_UUID cpu_to_le32(0xC0020006)
+#define RPC_NT_INVALID_ENDPOINT_FORMAT cpu_to_le32(0xC0020007)
+#define RPC_NT_INVALID_NET_ADDR cpu_to_le32(0xC0020008)
+#define RPC_NT_NO_ENDPOINT_FOUND cpu_to_le32(0xC0020009)
+#define RPC_NT_INVALID_TIMEOUT cpu_to_le32(0xC002000A)
+#define RPC_NT_OBJECT_NOT_FOUND cpu_to_le32(0xC002000B)
+#define RPC_NT_ALREADY_REGISTERED cpu_to_le32(0xC002000C)
+#define RPC_NT_TYPE_ALREADY_REGISTERED cpu_to_le32(0xC002000D)
+#define RPC_NT_ALREADY_LISTENING cpu_to_le32(0xC002000E)
+#define RPC_NT_NO_PROTSEQS_REGISTERED cpu_to_le32(0xC002000F)
+#define RPC_NT_NOT_LISTENING cpu_to_le32(0xC0020010)
+#define RPC_NT_UNKNOWN_MGR_TYPE cpu_to_le32(0xC0020011)
+#define RPC_NT_UNKNOWN_IF cpu_to_le32(0xC0020012)
+#define RPC_NT_NO_BINDINGS cpu_to_le32(0xC0020013)
+#define RPC_NT_NO_PROTSEQS cpu_to_le32(0xC0020014)
+#define RPC_NT_CANT_CREATE_ENDPOINT cpu_to_le32(0xC0020015)
+#define RPC_NT_OUT_OF_RESOURCES cpu_to_le32(0xC0020016)
+#define RPC_NT_SERVER_UNAVAILABLE cpu_to_le32(0xC0020017)
+#define RPC_NT_SERVER_TOO_BUSY cpu_to_le32(0xC0020018)
+#define RPC_NT_INVALID_NETWORK_OPTIONS cpu_to_le32(0xC0020019)
+#define RPC_NT_NO_CALL_ACTIVE cpu_to_le32(0xC002001A)
+#define RPC_NT_CALL_FAILED cpu_to_le32(0xC002001B)
+#define RPC_NT_CALL_FAILED_DNE cpu_to_le32(0xC002001C)
+#define RPC_NT_PROTOCOL_ERROR cpu_to_le32(0xC002001D)
+#define RPC_NT_UNSUPPORTED_TRANS_SYN cpu_to_le32(0xC002001F)
+#define RPC_NT_UNSUPPORTED_TYPE cpu_to_le32(0xC0020021)
+#define RPC_NT_INVALID_TAG cpu_to_le32(0xC0020022)
+#define RPC_NT_INVALID_BOUND cpu_to_le32(0xC0020023)
+#define RPC_NT_NO_ENTRY_NAME cpu_to_le32(0xC0020024)
+#define RPC_NT_INVALID_NAME_SYNTAX cpu_to_le32(0xC0020025)
+#define RPC_NT_UNSUPPORTED_NAME_SYNTAX cpu_to_le32(0xC0020026)
+#define RPC_NT_UUID_NO_ADDRESS cpu_to_le32(0xC0020028)
+#define RPC_NT_DUPLICATE_ENDPOINT cpu_to_le32(0xC0020029)
+#define RPC_NT_UNKNOWN_AUTHN_TYPE cpu_to_le32(0xC002002A)
+#define RPC_NT_MAX_CALLS_TOO_SMALL cpu_to_le32(0xC002002B)
+#define RPC_NT_STRING_TOO_LONG cpu_to_le32(0xC002002C)
+#define RPC_NT_PROTSEQ_NOT_FOUND cpu_to_le32(0xC002002D)
+#define RPC_NT_PROCNUM_OUT_OF_RANGE cpu_to_le32(0xC002002E)
+#define RPC_NT_BINDING_HAS_NO_AUTH cpu_to_le32(0xC002002F)
+#define RPC_NT_UNKNOWN_AUTHN_SERVICE cpu_to_le32(0xC0020030)
+#define RPC_NT_UNKNOWN_AUTHN_LEVEL cpu_to_le32(0xC0020031)
+#define RPC_NT_INVALID_AUTH_IDENTITY cpu_to_le32(0xC0020032)
+#define RPC_NT_UNKNOWN_AUTHZ_SERVICE cpu_to_le32(0xC0020033)
+#define EPT_NT_INVALID_ENTRY cpu_to_le32(0xC0020034)
+#define EPT_NT_CANT_PERFORM_OP cpu_to_le32(0xC0020035)
+#define EPT_NT_NOT_REGISTERED cpu_to_le32(0xC0020036)
+#define RPC_NT_NOTHING_TO_EXPORT cpu_to_le32(0xC0020037)
+#define RPC_NT_INCOMPLETE_NAME cpu_to_le32(0xC0020038)
+#define RPC_NT_INVALID_VERS_OPTION cpu_to_le32(0xC0020039)
+#define RPC_NT_NO_MORE_MEMBERS cpu_to_le32(0xC002003A)
+#define RPC_NT_NOT_ALL_OBJS_UNEXPORTED cpu_to_le32(0xC002003B)
+#define RPC_NT_INTERFACE_NOT_FOUND cpu_to_le32(0xC002003C)
+#define RPC_NT_ENTRY_ALREADY_EXISTS cpu_to_le32(0xC002003D)
+#define RPC_NT_ENTRY_NOT_FOUND cpu_to_le32(0xC002003E)
+#define RPC_NT_NAME_SERVICE_UNAVAILABLE cpu_to_le32(0xC002003F)
+#define RPC_NT_INVALID_NAF_ID cpu_to_le32(0xC0020040)
+#define RPC_NT_CANNOT_SUPPORT cpu_to_le32(0xC0020041)
+#define RPC_NT_NO_CONTEXT_AVAILABLE cpu_to_le32(0xC0020042)
+#define RPC_NT_INTERNAL_ERROR cpu_to_le32(0xC0020043)
+#define RPC_NT_ZERO_DIVIDE cpu_to_le32(0xC0020044)
+#define RPC_NT_ADDRESS_ERROR cpu_to_le32(0xC0020045)
+#define RPC_NT_FP_DIV_ZERO cpu_to_le32(0xC0020046)
+#define RPC_NT_FP_UNDERFLOW cpu_to_le32(0xC0020047)
+#define RPC_NT_FP_OVERFLOW cpu_to_le32(0xC0020048)
+#define RPC_NT_CALL_IN_PROGRESS cpu_to_le32(0xC0020049)
+#define RPC_NT_NO_MORE_BINDINGS cpu_to_le32(0xC002004A)
+#define RPC_NT_GROUP_MEMBER_NOT_FOUND cpu_to_le32(0xC002004B)
+#define EPT_NT_CANT_CREATE cpu_to_le32(0xC002004C)
+#define RPC_NT_INVALID_OBJECT cpu_to_le32(0xC002004D)
+#define RPC_NT_NO_INTERFACES cpu_to_le32(0xC002004F)
+#define RPC_NT_CALL_CANCELLED cpu_to_le32(0xC0020050)
+#define RPC_NT_BINDING_INCOMPLETE cpu_to_le32(0xC0020051)
+#define RPC_NT_COMM_FAILURE cpu_to_le32(0xC0020052)
+#define RPC_NT_UNSUPPORTED_AUTHN_LEVEL cpu_to_le32(0xC0020053)
+#define RPC_NT_NO_PRINC_NAME cpu_to_le32(0xC0020054)
+#define RPC_NT_NOT_RPC_ERROR cpu_to_le32(0xC0020055)
+#define RPC_NT_SEC_PKG_ERROR cpu_to_le32(0xC0020057)
+#define RPC_NT_NOT_CANCELLED cpu_to_le32(0xC0020058)
+#define RPC_NT_INVALID_ASYNC_HANDLE cpu_to_le32(0xC0020062)
+#define RPC_NT_INVALID_ASYNC_CALL cpu_to_le32(0xC0020063)
+#define RPC_NT_PROXY_ACCESS_DENIED cpu_to_le32(0xC0020064)
+#define RPC_NT_NO_MORE_ENTRIES cpu_to_le32(0xC0030001)
+#define RPC_NT_SS_CHAR_TRANS_OPEN_FAIL cpu_to_le32(0xC0030002)
+#define RPC_NT_SS_CHAR_TRANS_SHORT_FILE cpu_to_le32(0xC0030003)
+#define RPC_NT_SS_IN_NULL_CONTEXT cpu_to_le32(0xC0030004)
+#define RPC_NT_SS_CONTEXT_MISMATCH cpu_to_le32(0xC0030005)
+#define RPC_NT_SS_CONTEXT_DAMAGED cpu_to_le32(0xC0030006)
+#define RPC_NT_SS_HANDLES_MISMATCH cpu_to_le32(0xC0030007)
+#define RPC_NT_SS_CANNOT_GET_CALL_HANDLE cpu_to_le32(0xC0030008)
+#define RPC_NT_NULL_REF_POINTER cpu_to_le32(0xC0030009)
+#define RPC_NT_ENUM_VALUE_OUT_OF_RANGE cpu_to_le32(0xC003000A)
+#define RPC_NT_BYTE_COUNT_TOO_SMALL cpu_to_le32(0xC003000B)
+#define RPC_NT_BAD_STUB_DATA cpu_to_le32(0xC003000C)
+#define RPC_NT_INVALID_ES_ACTION cpu_to_le32(0xC0030059)
+#define RPC_NT_WRONG_ES_VERSION cpu_to_le32(0xC003005A)
+#define RPC_NT_WRONG_STUB_VERSION cpu_to_le32(0xC003005B)
+#define RPC_NT_INVALID_PIPE_OBJECT cpu_to_le32(0xC003005C)
+#define RPC_NT_INVALID_PIPE_OPERATION cpu_to_le32(0xC003005D)
+#define RPC_NT_WRONG_PIPE_VERSION cpu_to_le32(0xC003005E)
+#define RPC_NT_PIPE_CLOSED cpu_to_le32(0xC003005F)
+#define RPC_NT_PIPE_DISCIPLINE_ERROR cpu_to_le32(0xC0030060)
+#define RPC_NT_PIPE_EMPTY cpu_to_le32(0xC0030061)
+#define STATUS_PNP_BAD_MPS_TABLE cpu_to_le32(0xC0040035)
+#define STATUS_PNP_TRANSLATION_FAILED cpu_to_le32(0xC0040036)
+#define STATUS_PNP_IRQ_TRANSLATION_FAILED cpu_to_le32(0xC0040037)
+#define STATUS_PNP_INVALID_ID cpu_to_le32(0xC0040038)
+#define STATUS_IO_REISSUE_AS_CACHED cpu_to_le32(0xC0040039)
+#define STATUS_CTX_WINSTATION_NAME_INVALID cpu_to_le32(0xC00A0001)
+#define STATUS_CTX_INVALID_PD cpu_to_le32(0xC00A0002)
+#define STATUS_CTX_PD_NOT_FOUND cpu_to_le32(0xC00A0003)
+#define STATUS_CTX_CLOSE_PENDING cpu_to_le32(0xC00A0006)
+#define STATUS_CTX_NO_OUTBUF cpu_to_le32(0xC00A0007)
+#define STATUS_CTX_MODEM_INF_NOT_FOUND cpu_to_le32(0xC00A0008)
+#define STATUS_CTX_INVALID_MODEMNAME cpu_to_le32(0xC00A0009)
+#define STATUS_CTX_RESPONSE_ERROR cpu_to_le32(0xC00A000A)
+#define STATUS_CTX_MODEM_RESPONSE_TIMEOUT cpu_to_le32(0xC00A000B)
+#define STATUS_CTX_MODEM_RESPONSE_NO_CARRIER cpu_to_le32(0xC00A000C)
+#define STATUS_CTX_MODEM_RESPONSE_NO_DIALTONE cpu_to_le32(0xC00A000D)
+#define STATUS_CTX_MODEM_RESPONSE_BUSY cpu_to_le32(0xC00A000E)
+#define STATUS_CTX_MODEM_RESPONSE_VOICE cpu_to_le32(0xC00A000F)
+#define STATUS_CTX_TD_ERROR cpu_to_le32(0xC00A0010)
+#define STATUS_CTX_LICENSE_CLIENT_INVALID cpu_to_le32(0xC00A0012)
+#define STATUS_CTX_LICENSE_NOT_AVAILABLE cpu_to_le32(0xC00A0013)
+#define STATUS_CTX_LICENSE_EXPIRED cpu_to_le32(0xC00A0014)
+#define STATUS_CTX_WINSTATION_NOT_FOUND cpu_to_le32(0xC00A0015)
+#define STATUS_CTX_WINSTATION_NAME_COLLISION cpu_to_le32(0xC00A0016)
+#define STATUS_CTX_WINSTATION_BUSY cpu_to_le32(0xC00A0017)
+#define STATUS_CTX_BAD_VIDEO_MODE cpu_to_le32(0xC00A0018)
+#define STATUS_CTX_GRAPHICS_INVALID cpu_to_le32(0xC00A0022)
+#define STATUS_CTX_NOT_CONSOLE cpu_to_le32(0xC00A0024)
+#define STATUS_CTX_CLIENT_QUERY_TIMEOUT cpu_to_le32(0xC00A0026)
+#define STATUS_CTX_CONSOLE_DISCONNECT cpu_to_le32(0xC00A0027)
+#define STATUS_CTX_CONSOLE_CONNECT cpu_to_le32(0xC00A0028)
+#define STATUS_CTX_SHADOW_DENIED cpu_to_le32(0xC00A002A)
+#define STATUS_CTX_WINSTATION_ACCESS_DENIED cpu_to_le32(0xC00A002B)
+#define STATUS_CTX_INVALID_WD cpu_to_le32(0xC00A002E)
+#define STATUS_CTX_WD_NOT_FOUND cpu_to_le32(0xC00A002F)
+#define STATUS_CTX_SHADOW_INVALID cpu_to_le32(0xC00A0030)
+#define STATUS_CTX_SHADOW_DISABLED cpu_to_le32(0xC00A0031)
+#define STATUS_RDP_PROTOCOL_ERROR cpu_to_le32(0xC00A0032)
+#define STATUS_CTX_CLIENT_LICENSE_NOT_SET cpu_to_le32(0xC00A0033)
+#define STATUS_CTX_CLIENT_LICENSE_IN_USE cpu_to_le32(0xC00A0034)
+#define STATUS_CTX_SHADOW_ENDED_BY_MODE_CHANGE cpu_to_le32(0xC00A0035)
+#define STATUS_CTX_SHADOW_NOT_RUNNING cpu_to_le32(0xC00A0036)
+#define STATUS_CTX_LOGON_DISABLED cpu_to_le32(0xC00A0037)
+#define STATUS_CTX_SECURITY_LAYER_ERROR cpu_to_le32(0xC00A0038)
+#define STATUS_TS_INCOMPATIBLE_SESSIONS cpu_to_le32(0xC00A0039)
+#define STATUS_MUI_FILE_NOT_FOUND cpu_to_le32(0xC00B0001)
+#define STATUS_MUI_INVALID_FILE cpu_to_le32(0xC00B0002)
+#define STATUS_MUI_INVALID_RC_CONFIG cpu_to_le32(0xC00B0003)
+#define STATUS_MUI_INVALID_LOCALE_NAME cpu_to_le32(0xC00B0004)
+#define STATUS_MUI_INVALID_ULTIMATEFALLBACK_NAME cpu_to_le32(0xC00B0005)
+#define STATUS_MUI_FILE_NOT_LOADED cpu_to_le32(0xC00B0006)
+#define STATUS_RESOURCE_ENUM_USER_STOP cpu_to_le32(0xC00B0007)
+#define STATUS_CLUSTER_INVALID_NODE cpu_to_le32(0xC0130001)
+#define STATUS_CLUSTER_NODE_EXISTS cpu_to_le32(0xC0130002)
+#define STATUS_CLUSTER_JOIN_IN_PROGRESS cpu_to_le32(0xC0130003)
+#define STATUS_CLUSTER_NODE_NOT_FOUND cpu_to_le32(0xC0130004)
+#define STATUS_CLUSTER_LOCAL_NODE_NOT_FOUND cpu_to_le32(0xC0130005)
+#define STATUS_CLUSTER_NETWORK_EXISTS cpu_to_le32(0xC0130006)
+#define STATUS_CLUSTER_NETWORK_NOT_FOUND cpu_to_le32(0xC0130007)
+#define STATUS_CLUSTER_NETINTERFACE_EXISTS cpu_to_le32(0xC0130008)
+#define STATUS_CLUSTER_NETINTERFACE_NOT_FOUND cpu_to_le32(0xC0130009)
+#define STATUS_CLUSTER_INVALID_REQUEST cpu_to_le32(0xC013000A)
+#define STATUS_CLUSTER_INVALID_NETWORK_PROVIDER cpu_to_le32(0xC013000B)
+#define STATUS_CLUSTER_NODE_DOWN cpu_to_le32(0xC013000C)
+#define STATUS_CLUSTER_NODE_UNREACHABLE cpu_to_le32(0xC013000D)
+#define STATUS_CLUSTER_NODE_NOT_MEMBER cpu_to_le32(0xC013000E)
+#define STATUS_CLUSTER_JOIN_NOT_IN_PROGRESS cpu_to_le32(0xC013000F)
+#define STATUS_CLUSTER_INVALID_NETWORK cpu_to_le32(0xC0130010)
+#define STATUS_CLUSTER_NO_NET_ADAPTERS cpu_to_le32(0xC0130011)
+#define STATUS_CLUSTER_NODE_UP cpu_to_le32(0xC0130012)
+#define STATUS_CLUSTER_NODE_PAUSED cpu_to_le32(0xC0130013)
+#define STATUS_CLUSTER_NODE_NOT_PAUSED cpu_to_le32(0xC0130014)
+#define STATUS_CLUSTER_NO_SECURITY_CONTEXT cpu_to_le32(0xC0130015)
+#define STATUS_CLUSTER_NETWORK_NOT_INTERNAL cpu_to_le32(0xC0130016)
+#define STATUS_CLUSTER_POISONED cpu_to_le32(0xC0130017)
+#define STATUS_ACPI_INVALID_OPCODE cpu_to_le32(0xC0140001)
+#define STATUS_ACPI_STACK_OVERFLOW cpu_to_le32(0xC0140002)
+#define STATUS_ACPI_ASSERT_FAILED cpu_to_le32(0xC0140003)
+#define STATUS_ACPI_INVALID_INDEX cpu_to_le32(0xC0140004)
+#define STATUS_ACPI_INVALID_ARGUMENT cpu_to_le32(0xC0140005)
+#define STATUS_ACPI_FATAL cpu_to_le32(0xC0140006)
+#define STATUS_ACPI_INVALID_SUPERNAME cpu_to_le32(0xC0140007)
+#define STATUS_ACPI_INVALID_ARGTYPE cpu_to_le32(0xC0140008)
+#define STATUS_ACPI_INVALID_OBJTYPE cpu_to_le32(0xC0140009)
+#define STATUS_ACPI_INVALID_TARGETTYPE cpu_to_le32(0xC014000A)
+#define STATUS_ACPI_INCORRECT_ARGUMENT_COUNT cpu_to_le32(0xC014000B)
+#define STATUS_ACPI_ADDRESS_NOT_MAPPED cpu_to_le32(0xC014000C)
+#define STATUS_ACPI_INVALID_EVENTTYPE cpu_to_le32(0xC014000D)
+#define STATUS_ACPI_HANDLER_COLLISION cpu_to_le32(0xC014000E)
+#define STATUS_ACPI_INVALID_DATA cpu_to_le32(0xC014000F)
+#define STATUS_ACPI_INVALID_REGION cpu_to_le32(0xC0140010)
+#define STATUS_ACPI_INVALID_ACCESS_SIZE cpu_to_le32(0xC0140011)
+#define STATUS_ACPI_ACQUIRE_GLOBAL_LOCK cpu_to_le32(0xC0140012)
+#define STATUS_ACPI_ALREADY_INITIALIZED cpu_to_le32(0xC0140013)
+#define STATUS_ACPI_NOT_INITIALIZED cpu_to_le32(0xC0140014)
+#define STATUS_ACPI_INVALID_MUTEX_LEVEL cpu_to_le32(0xC0140015)
+#define STATUS_ACPI_MUTEX_NOT_OWNED cpu_to_le32(0xC0140016)
+#define STATUS_ACPI_MUTEX_NOT_OWNER cpu_to_le32(0xC0140017)
+#define STATUS_ACPI_RS_ACCESS cpu_to_le32(0xC0140018)
+#define STATUS_ACPI_INVALID_TABLE cpu_to_le32(0xC0140019)
+#define STATUS_ACPI_REG_HANDLER_FAILED cpu_to_le32(0xC0140020)
+#define STATUS_ACPI_POWER_REQUEST_FAILED cpu_to_le32(0xC0140021)
+#define STATUS_SXS_SECTION_NOT_FOUND cpu_to_le32(0xC0150001)
+#define STATUS_SXS_CANT_GEN_ACTCTX cpu_to_le32(0xC0150002)
+#define STATUS_SXS_INVALID_ACTCTXDATA_FORMAT cpu_to_le32(0xC0150003)
+#define STATUS_SXS_ASSEMBLY_NOT_FOUND cpu_to_le32(0xC0150004)
+#define STATUS_SXS_MANIFEST_FORMAT_ERROR cpu_to_le32(0xC0150005)
+#define STATUS_SXS_MANIFEST_PARSE_ERROR cpu_to_le32(0xC0150006)
+#define STATUS_SXS_ACTIVATION_CONTEXT_DISABLED cpu_to_le32(0xC0150007)
+#define STATUS_SXS_KEY_NOT_FOUND cpu_to_le32(0xC0150008)
+#define STATUS_SXS_VERSION_CONFLICT cpu_to_le32(0xC0150009)
+#define STATUS_SXS_WRONG_SECTION_TYPE cpu_to_le32(0xC015000A)
+#define STATUS_SXS_THREAD_QUERIES_DISABLED cpu_to_le32(0xC015000B)
+#define STATUS_SXS_ASSEMBLY_MISSING cpu_to_le32(0xC015000C)
+#define STATUS_SXS_PROCESS_DEFAULT_ALREADY_SET cpu_to_le32(0xC015000E)
+#define STATUS_SXS_EARLY_DEACTIVATION cpu_to_le32(0xC015000F)
+#define STATUS_SXS_INVALID_DEACTIVATION cpu_to_le32(0xC0150010)
+#define STATUS_SXS_MULTIPLE_DEACTIVATION cpu_to_le32(0xC0150011)
+#define STATUS_SXS_SYSTEM_DEFAULT_ACTIVATION_CONTEXT_EMPTY cpu_to_le32(0xC0150012)
+#define STATUS_SXS_PROCESS_TERMINATION_REQUESTED cpu_to_le32(0xC0150013)
+#define STATUS_SXS_CORRUPT_ACTIVATION_STACK cpu_to_le32(0xC0150014)
+#define STATUS_SXS_CORRUPTION cpu_to_le32(0xC0150015)
+#define STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_VALUE cpu_to_le32(0xC0150016)
+#define STATUS_SXS_INVALID_IDENTITY_ATTRIBUTE_NAME cpu_to_le32(0xC0150017)
+#define STATUS_SXS_IDENTITY_DUPLICATE_ATTRIBUTE cpu_to_le32(0xC0150018)
+#define STATUS_SXS_IDENTITY_PARSE_ERROR cpu_to_le32(0xC0150019)
+#define STATUS_SXS_COMPONENT_STORE_CORRUPT cpu_to_le32(0xC015001A)
+#define STATUS_SXS_FILE_HASH_MISMATCH cpu_to_le32(0xC015001B)
+#define STATUS_SXS_MANIFEST_IDENTITY_SAME_BUT_CONTENTS_DIFFERENT cpu_to_le32(0xC015001C)
+#define STATUS_SXS_IDENTITIES_DIFFERENT cpu_to_le32(0xC015001D)
+#define STATUS_SXS_ASSEMBLY_IS_NOT_A_DEPLOYMENT cpu_to_le32(0xC015001E)
+#define STATUS_SXS_FILE_NOT_PART_OF_ASSEMBLY cpu_to_le32(0xC015001F)
+#define STATUS_ADVANCED_INSTALLER_FAILED cpu_to_le32(0xC0150020)
+#define STATUS_XML_ENCODING_MISMATCH cpu_to_le32(0xC0150021)
+#define STATUS_SXS_MANIFEST_TOO_BIG cpu_to_le32(0xC0150022)
+#define STATUS_SXS_SETTING_NOT_REGISTERED cpu_to_le32(0xC0150023)
+#define STATUS_SXS_TRANSACTION_CLOSURE_INCOMPLETE cpu_to_le32(0xC0150024)
+#define STATUS_SMI_PRIMITIVE_INSTALLER_FAILED cpu_to_le32(0xC0150025)
+#define STATUS_GENERIC_COMMAND_FAILED cpu_to_le32(0xC0150026)
+#define STATUS_SXS_FILE_HASH_MISSING cpu_to_le32(0xC0150027)
+#define STATUS_TRANSACTIONAL_CONFLICT cpu_to_le32(0xC0190001)
+#define STATUS_INVALID_TRANSACTION cpu_to_le32(0xC0190002)
+#define STATUS_TRANSACTION_NOT_ACTIVE cpu_to_le32(0xC0190003)
+#define STATUS_TM_INITIALIZATION_FAILED cpu_to_le32(0xC0190004)
+#define STATUS_RM_NOT_ACTIVE cpu_to_le32(0xC0190005)
+#define STATUS_RM_METADATA_CORRUPT cpu_to_le32(0xC0190006)
+#define STATUS_TRANSACTION_NOT_JOINED cpu_to_le32(0xC0190007)
+#define STATUS_DIRECTORY_NOT_RM cpu_to_le32(0xC0190008)
+#define STATUS_TRANSACTIONS_UNSUPPORTED_REMOTE cpu_to_le32(0xC019000A)
+#define STATUS_LOG_RESIZE_INVALID_SIZE cpu_to_le32(0xC019000B)
+#define STATUS_REMOTE_FILE_VERSION_MISMATCH cpu_to_le32(0xC019000C)
+#define STATUS_CRM_PROTOCOL_ALREADY_EXISTS cpu_to_le32(0xC019000F)
+#define STATUS_TRANSACTION_PROPAGATION_FAILED cpu_to_le32(0xC0190010)
+#define STATUS_CRM_PROTOCOL_NOT_FOUND cpu_to_le32(0xC0190011)
+#define STATUS_TRANSACTION_SUPERIOR_EXISTS cpu_to_le32(0xC0190012)
+#define STATUS_TRANSACTION_REQUEST_NOT_VALID cpu_to_le32(0xC0190013)
+#define STATUS_TRANSACTION_NOT_REQUESTED cpu_to_le32(0xC0190014)
+#define STATUS_TRANSACTION_ALREADY_ABORTED cpu_to_le32(0xC0190015)
+#define STATUS_TRANSACTION_ALREADY_COMMITTED cpu_to_le32(0xC0190016)
+#define STATUS_TRANSACTION_INVALID_MARSHALL_BUFFER cpu_to_le32(0xC0190017)
+#define STATUS_CURRENT_TRANSACTION_NOT_VALID cpu_to_le32(0xC0190018)
+#define STATUS_LOG_GROWTH_FAILED cpu_to_le32(0xC0190019)
+#define STATUS_OBJECT_NO_LONGER_EXISTS cpu_to_le32(0xC0190021)
+#define STATUS_STREAM_MINIVERSION_NOT_FOUND cpu_to_le32(0xC0190022)
+#define STATUS_STREAM_MINIVERSION_NOT_VALID cpu_to_le32(0xC0190023)
+#define STATUS_MINIVERSION_INACCESSIBLE_FROM_SPECIFIED_TRANSACTION cpu_to_le32(0xC0190024)
+#define STATUS_CANT_OPEN_MINIVERSION_WITH_MODIFY_INTENT cpu_to_le32(0xC0190025)
+#define STATUS_CANT_CREATE_MORE_STREAM_MINIVERSIONS cpu_to_le32(0xC0190026)
+#define STATUS_HANDLE_NO_LONGER_VALID cpu_to_le32(0xC0190028)
+#define STATUS_LOG_CORRUPTION_DETECTED cpu_to_le32(0xC0190030)
+#define STATUS_RM_DISCONNECTED cpu_to_le32(0xC0190032)
+#define STATUS_ENLISTMENT_NOT_SUPERIOR cpu_to_le32(0xC0190033)
+#define STATUS_FILE_IDENTITY_NOT_PERSISTENT cpu_to_le32(0xC0190036)
+#define STATUS_CANT_BREAK_TRANSACTIONAL_DEPENDENCY cpu_to_le32(0xC0190037)
+#define STATUS_CANT_CROSS_RM_BOUNDARY cpu_to_le32(0xC0190038)
+#define STATUS_TXF_DIR_NOT_EMPTY cpu_to_le32(0xC0190039)
+#define STATUS_INDOUBT_TRANSACTIONS_EXIST cpu_to_le32(0xC019003A)
+#define STATUS_TM_VOLATILE cpu_to_le32(0xC019003B)
+#define STATUS_ROLLBACK_TIMER_EXPIRED cpu_to_le32(0xC019003C)
+#define STATUS_TXF_ATTRIBUTE_CORRUPT cpu_to_le32(0xC019003D)
+#define STATUS_EFS_NOT_ALLOWED_IN_TRANSACTION cpu_to_le32(0xC019003E)
+#define STATUS_TRANSACTIONAL_OPEN_NOT_ALLOWED cpu_to_le32(0xC019003F)
+#define STATUS_TRANSACTED_MAPPING_UNSUPPORTED_REMOTE cpu_to_le32(0xC0190040)
+#define STATUS_TRANSACTION_REQUIRED_PROMOTION cpu_to_le32(0xC0190043)
+#define STATUS_CANNOT_EXECUTE_FILE_IN_TRANSACTION cpu_to_le32(0xC0190044)
+#define STATUS_TRANSACTIONS_NOT_FROZEN cpu_to_le32(0xC0190045)
+#define STATUS_TRANSACTION_FREEZE_IN_PROGRESS cpu_to_le32(0xC0190046)
+#define STATUS_NOT_SNAPSHOT_VOLUME cpu_to_le32(0xC0190047)
+#define STATUS_NO_SAVEPOINT_WITH_OPEN_FILES cpu_to_le32(0xC0190048)
+#define STATUS_SPARSE_NOT_ALLOWED_IN_TRANSACTION cpu_to_le32(0xC0190049)
+#define STATUS_TM_IDENTITY_MISMATCH cpu_to_le32(0xC019004A)
+#define STATUS_FLOATED_SECTION cpu_to_le32(0xC019004B)
+#define STATUS_CANNOT_ACCEPT_TRANSACTED_WORK cpu_to_le32(0xC019004C)
+#define STATUS_CANNOT_ABORT_TRANSACTIONS cpu_to_le32(0xC019004D)
+#define STATUS_TRANSACTION_NOT_FOUND cpu_to_le32(0xC019004E)
+#define STATUS_RESOURCEMANAGER_NOT_FOUND cpu_to_le32(0xC019004F)
+#define STATUS_ENLISTMENT_NOT_FOUND cpu_to_le32(0xC0190050)
+#define STATUS_TRANSACTIONMANAGER_NOT_FOUND cpu_to_le32(0xC0190051)
+#define STATUS_TRANSACTIONMANAGER_NOT_ONLINE cpu_to_le32(0xC0190052)
+#define STATUS_TRANSACTIONMANAGER_RECOVERY_NAME_COLLISION cpu_to_le32(0xC0190053)
+#define STATUS_TRANSACTION_NOT_ROOT cpu_to_le32(0xC0190054)
+#define STATUS_TRANSACTION_OBJECT_EXPIRED cpu_to_le32(0xC0190055)
+#define STATUS_COMPRESSION_NOT_ALLOWED_IN_TRANSACTION cpu_to_le32(0xC0190056)
+#define STATUS_TRANSACTION_RESPONSE_NOT_ENLISTED cpu_to_le32(0xC0190057)
+#define STATUS_TRANSACTION_RECORD_TOO_LONG cpu_to_le32(0xC0190058)
+#define STATUS_NO_LINK_TRACKING_IN_TRANSACTION cpu_to_le32(0xC0190059)
+#define STATUS_OPERATION_NOT_SUPPORTED_IN_TRANSACTION cpu_to_le32(0xC019005A)
+#define STATUS_TRANSACTION_INTEGRITY_VIOLATED cpu_to_le32(0xC019005B)
+#define STATUS_LOG_SECTOR_INVALID cpu_to_le32(0xC01A0001)
+#define STATUS_LOG_SECTOR_PARITY_INVALID cpu_to_le32(0xC01A0002)
+#define STATUS_LOG_SECTOR_REMAPPED cpu_to_le32(0xC01A0003)
+#define STATUS_LOG_BLOCK_INCOMPLETE cpu_to_le32(0xC01A0004)
+#define STATUS_LOG_INVALID_RANGE cpu_to_le32(0xC01A0005)
+#define STATUS_LOG_BLOCKS_EXHAUSTED cpu_to_le32(0xC01A0006)
+#define STATUS_LOG_READ_CONTEXT_INVALID cpu_to_le32(0xC01A0007)
+#define STATUS_LOG_RESTART_INVALID cpu_to_le32(0xC01A0008)
+#define STATUS_LOG_BLOCK_VERSION cpu_to_le32(0xC01A0009)
+#define STATUS_LOG_BLOCK_INVALID cpu_to_le32(0xC01A000A)
+#define STATUS_LOG_READ_MODE_INVALID cpu_to_le32(0xC01A000B)
+#define STATUS_LOG_METADATA_CORRUPT cpu_to_le32(0xC01A000D)
+#define STATUS_LOG_METADATA_INVALID cpu_to_le32(0xC01A000E)
+#define STATUS_LOG_METADATA_INCONSISTENT cpu_to_le32(0xC01A000F)
+#define STATUS_LOG_RESERVATION_INVALID cpu_to_le32(0xC01A0010)
+#define STATUS_LOG_CANT_DELETE cpu_to_le32(0xC01A0011)
+#define STATUS_LOG_CONTAINER_LIMIT_EXCEEDED cpu_to_le32(0xC01A0012)
+#define STATUS_LOG_START_OF_LOG cpu_to_le32(0xC01A0013)
+#define STATUS_LOG_POLICY_ALREADY_INSTALLED cpu_to_le32(0xC01A0014)
+#define STATUS_LOG_POLICY_NOT_INSTALLED cpu_to_le32(0xC01A0015)
+#define STATUS_LOG_POLICY_INVALID cpu_to_le32(0xC01A0016)
+#define STATUS_LOG_POLICY_CONFLICT cpu_to_le32(0xC01A0017)
+#define STATUS_LOG_PINNED_ARCHIVE_TAIL cpu_to_le32(0xC01A0018)
+#define STATUS_LOG_RECORD_NONEXISTENT cpu_to_le32(0xC01A0019)
+#define STATUS_LOG_RECORDS_RESERVED_INVALID cpu_to_le32(0xC01A001A)
+#define STATUS_LOG_SPACE_RESERVED_INVALID cpu_to_le32(0xC01A001B)
+#define STATUS_LOG_TAIL_INVALID cpu_to_le32(0xC01A001C)
+#define STATUS_LOG_FULL cpu_to_le32(0xC01A001D)
+#define STATUS_LOG_MULTIPLEXED cpu_to_le32(0xC01A001E)
+#define STATUS_LOG_DEDICATED cpu_to_le32(0xC01A001F)
+#define STATUS_LOG_ARCHIVE_NOT_IN_PROGRESS cpu_to_le32(0xC01A0020)
+#define STATUS_LOG_ARCHIVE_IN_PROGRESS cpu_to_le32(0xC01A0021)
+#define STATUS_LOG_EPHEMERAL cpu_to_le32(0xC01A0022)
+#define STATUS_LOG_NOT_ENOUGH_CONTAINERS cpu_to_le32(0xC01A0023)
+#define STATUS_LOG_CLIENT_ALREADY_REGISTERED cpu_to_le32(0xC01A0024)
+#define STATUS_LOG_CLIENT_NOT_REGISTERED cpu_to_le32(0xC01A0025)
+#define STATUS_LOG_FULL_HANDLER_IN_PROGRESS cpu_to_le32(0xC01A0026)
+#define STATUS_LOG_CONTAINER_READ_FAILED cpu_to_le32(0xC01A0027)
+#define STATUS_LOG_CONTAINER_WRITE_FAILED cpu_to_le32(0xC01A0028)
+#define STATUS_LOG_CONTAINER_OPEN_FAILED cpu_to_le32(0xC01A0029)
+#define STATUS_LOG_CONTAINER_STATE_INVALID cpu_to_le32(0xC01A002A)
+#define STATUS_LOG_STATE_INVALID cpu_to_le32(0xC01A002B)
+#define STATUS_LOG_PINNED cpu_to_le32(0xC01A002C)
+#define STATUS_LOG_METADATA_FLUSH_FAILED cpu_to_le32(0xC01A002D)
+#define STATUS_LOG_INCONSISTENT_SECURITY cpu_to_le32(0xC01A002E)
+#define STATUS_LOG_APPENDED_FLUSH_FAILED cpu_to_le32(0xC01A002F)
+#define STATUS_LOG_PINNED_RESERVATION cpu_to_le32(0xC01A0030)
+#define STATUS_VIDEO_HUNG_DISPLAY_DRIVER_THREAD cpu_to_le32(0xC01B00EA)
+#define STATUS_FLT_NO_HANDLER_DEFINED cpu_to_le32(0xC01C0001)
+#define STATUS_FLT_CONTEXT_ALREADY_DEFINED cpu_to_le32(0xC01C0002)
+#define STATUS_FLT_INVALID_ASYNCHRONOUS_REQUEST cpu_to_le32(0xC01C0003)
+#define STATUS_FLT_DISALLOW_FAST_IO cpu_to_le32(0xC01C0004)
+#define STATUS_FLT_INVALID_NAME_REQUEST cpu_to_le32(0xC01C0005)
+#define STATUS_FLT_NOT_SAFE_TO_POST_OPERATION cpu_to_le32(0xC01C0006)
+#define STATUS_FLT_NOT_INITIALIZED cpu_to_le32(0xC01C0007)
+#define STATUS_FLT_FILTER_NOT_READY cpu_to_le32(0xC01C0008)
+#define STATUS_FLT_POST_OPERATION_CLEANUP cpu_to_le32(0xC01C0009)
+#define STATUS_FLT_INTERNAL_ERROR cpu_to_le32(0xC01C000A)
+#define STATUS_FLT_DELETING_OBJECT cpu_to_le32(0xC01C000B)
+#define STATUS_FLT_MUST_BE_NONPAGED_POOL cpu_to_le32(0xC01C000C)
+#define STATUS_FLT_DUPLICATE_ENTRY cpu_to_le32(0xC01C000D)
+#define STATUS_FLT_CBDQ_DISABLED cpu_to_le32(0xC01C000E)
+#define STATUS_FLT_DO_NOT_ATTACH cpu_to_le32(0xC01C000F)
+#define STATUS_FLT_DO_NOT_DETACH cpu_to_le32(0xC01C0010)
+#define STATUS_FLT_INSTANCE_ALTITUDE_COLLISION cpu_to_le32(0xC01C0011)
+#define STATUS_FLT_INSTANCE_NAME_COLLISION cpu_to_le32(0xC01C0012)
+#define STATUS_FLT_FILTER_NOT_FOUND cpu_to_le32(0xC01C0013)
+#define STATUS_FLT_VOLUME_NOT_FOUND cpu_to_le32(0xC01C0014)
+#define STATUS_FLT_INSTANCE_NOT_FOUND cpu_to_le32(0xC01C0015)
+#define STATUS_FLT_CONTEXT_ALLOCATION_NOT_FOUND cpu_to_le32(0xC01C0016)
+#define STATUS_FLT_INVALID_CONTEXT_REGISTRATION cpu_to_le32(0xC01C0017)
+#define STATUS_FLT_NAME_CACHE_MISS cpu_to_le32(0xC01C0018)
+#define STATUS_FLT_NO_DEVICE_OBJECT cpu_to_le32(0xC01C0019)
+#define STATUS_FLT_VOLUME_ALREADY_MOUNTED cpu_to_le32(0xC01C001A)
+#define STATUS_FLT_ALREADY_ENLISTED cpu_to_le32(0xC01C001B)
+#define STATUS_FLT_CONTEXT_ALREADY_LINKED cpu_to_le32(0xC01C001C)
+#define STATUS_FLT_NO_WAITER_FOR_REPLY cpu_to_le32(0xC01C0020)
+#define STATUS_MONITOR_NO_DESCRIPTOR cpu_to_le32(0xC01D0001)
+#define STATUS_MONITOR_UNKNOWN_DESCRIPTOR_FORMAT cpu_to_le32(0xC01D0002)
+#define STATUS_MONITOR_INVALID_DESCRIPTOR_CHECKSUM cpu_to_le32(0xC01D0003)
+#define STATUS_MONITOR_INVALID_STANDARD_TIMING_BLOCK cpu_to_le32(0xC01D0004)
+#define STATUS_MONITOR_WMI_DATABLOCK_REGISTRATION_FAILED cpu_to_le32(0xC01D0005)
+#define STATUS_MONITOR_INVALID_SERIAL_NUMBER_MONDSC_BLOCK cpu_to_le32(0xC01D0006)
+#define STATUS_MONITOR_INVALID_USER_FRIENDLY_MONDSC_BLOCK cpu_to_le32(0xC01D0007)
+#define STATUS_MONITOR_NO_MORE_DESCRIPTOR_DATA cpu_to_le32(0xC01D0008)
+#define STATUS_MONITOR_INVALID_DETAILED_TIMING_BLOCK cpu_to_le32(0xC01D0009)
+#define STATUS_GRAPHICS_NOT_EXCLUSIVE_MODE_OWNER cpu_to_le32(0xC01E0000)
+#define STATUS_GRAPHICS_INSUFFICIENT_DMA_BUFFER cpu_to_le32(0xC01E0001)
+#define STATUS_GRAPHICS_INVALID_DISPLAY_ADAPTER cpu_to_le32(0xC01E0002)
+#define STATUS_GRAPHICS_ADAPTER_WAS_RESET cpu_to_le32(0xC01E0003)
+#define STATUS_GRAPHICS_INVALID_DRIVER_MODEL cpu_to_le32(0xC01E0004)
+#define STATUS_GRAPHICS_PRESENT_MODE_CHANGED cpu_to_le32(0xC01E0005)
+#define STATUS_GRAPHICS_PRESENT_OCCLUDED cpu_to_le32(0xC01E0006)
+#define STATUS_GRAPHICS_PRESENT_DENIED cpu_to_le32(0xC01E0007)
+#define STATUS_GRAPHICS_CANNOTCOLORCONVERT cpu_to_le32(0xC01E0008)
+#define STATUS_GRAPHICS_NO_VIDEO_MEMORY cpu_to_le32(0xC01E0100)
+#define STATUS_GRAPHICS_CANT_LOCK_MEMORY cpu_to_le32(0xC01E0101)
+#define STATUS_GRAPHICS_ALLOCATION_BUSY cpu_to_le32(0xC01E0102)
+#define STATUS_GRAPHICS_TOO_MANY_REFERENCES cpu_to_le32(0xC01E0103)
+#define STATUS_GRAPHICS_TRY_AGAIN_LATER cpu_to_le32(0xC01E0104)
+#define STATUS_GRAPHICS_TRY_AGAIN_NOW cpu_to_le32(0xC01E0105)
+#define STATUS_GRAPHICS_ALLOCATION_INVALID cpu_to_le32(0xC01E0106)
+#define STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNAVAILABLE cpu_to_le32(0xC01E0107)
+#define STATUS_GRAPHICS_UNSWIZZLING_APERTURE_UNSUPPORTED cpu_to_le32(0xC01E0108)
+#define STATUS_GRAPHICS_CANT_EVICT_PINNED_ALLOCATION cpu_to_le32(0xC01E0109)
+#define STATUS_GRAPHICS_INVALID_ALLOCATION_USAGE cpu_to_le32(0xC01E0110)
+#define STATUS_GRAPHICS_CANT_RENDER_LOCKED_ALLOCATION cpu_to_le32(0xC01E0111)
+#define STATUS_GRAPHICS_ALLOCATION_CLOSED cpu_to_le32(0xC01E0112)
+#define STATUS_GRAPHICS_INVALID_ALLOCATION_INSTANCE cpu_to_le32(0xC01E0113)
+#define STATUS_GRAPHICS_INVALID_ALLOCATION_HANDLE cpu_to_le32(0xC01E0114)
+#define STATUS_GRAPHICS_WRONG_ALLOCATION_DEVICE cpu_to_le32(0xC01E0115)
+#define STATUS_GRAPHICS_ALLOCATION_CONTENT_LOST cpu_to_le32(0xC01E0116)
+#define STATUS_GRAPHICS_GPU_EXCEPTION_ON_DEVICE cpu_to_le32(0xC01E0200)
+#define STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY cpu_to_le32(0xC01E0300)
+#define STATUS_GRAPHICS_VIDPN_TOPOLOGY_NOT_SUPPORTED cpu_to_le32(0xC01E0301)
+#define STATUS_GRAPHICS_VIDPN_TOPOLOGY_CURRENTLY_NOT_SUPPORTED cpu_to_le32(0xC01E0302)
+#define STATUS_GRAPHICS_INVALID_VIDPN cpu_to_le32(0xC01E0303)
+#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE cpu_to_le32(0xC01E0304)
+#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET cpu_to_le32(0xC01E0305)
+#define STATUS_GRAPHICS_VIDPN_MODALITY_NOT_SUPPORTED cpu_to_le32(0xC01E0306)
+#define STATUS_GRAPHICS_INVALID_VIDPN_SOURCEMODESET cpu_to_le32(0xC01E0308)
+#define STATUS_GRAPHICS_INVALID_VIDPN_TARGETMODESET cpu_to_le32(0xC01E0309)
+#define STATUS_GRAPHICS_INVALID_FREQUENCY cpu_to_le32(0xC01E030A)
+#define STATUS_GRAPHICS_INVALID_ACTIVE_REGION cpu_to_le32(0xC01E030B)
+#define STATUS_GRAPHICS_INVALID_TOTAL_REGION cpu_to_le32(0xC01E030C)
+#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_SOURCE_MODE cpu_to_le32(0xC01E0310)
+#define STATUS_GRAPHICS_INVALID_VIDEO_PRESENT_TARGET_MODE cpu_to_le32(0xC01E0311)
+#define STATUS_GRAPHICS_PINNED_MODE_MUST_REMAIN_IN_SET cpu_to_le32(0xC01E0312)
+#define STATUS_GRAPHICS_PATH_ALREADY_IN_TOPOLOGY cpu_to_le32(0xC01E0313)
+#define STATUS_GRAPHICS_MODE_ALREADY_IN_MODESET cpu_to_le32(0xC01E0314)
+#define STATUS_GRAPHICS_INVALID_VIDEOPRESENTSOURCESET cpu_to_le32(0xC01E0315)
+#define STATUS_GRAPHICS_INVALID_VIDEOPRESENTTARGETSET cpu_to_le32(0xC01E0316)
+#define STATUS_GRAPHICS_SOURCE_ALREADY_IN_SET cpu_to_le32(0xC01E0317)
+#define STATUS_GRAPHICS_TARGET_ALREADY_IN_SET cpu_to_le32(0xC01E0318)
+#define STATUS_GRAPHICS_INVALID_VIDPN_PRESENT_PATH cpu_to_le32(0xC01E0319)
+#define STATUS_GRAPHICS_NO_RECOMMENDED_VIDPN_TOPOLOGY cpu_to_le32(0xC01E031A)
+#define STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGESET cpu_to_le32(0xC01E031B)
+#define STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE cpu_to_le32(0xC01E031C)
+#define STATUS_GRAPHICS_FREQUENCYRANGE_NOT_IN_SET cpu_to_le32(0xC01E031D)
+#define STATUS_GRAPHICS_FREQUENCYRANGE_ALREADY_IN_SET cpu_to_le32(0xC01E031F)
+#define STATUS_GRAPHICS_STALE_MODESET cpu_to_le32(0xC01E0320)
+#define STATUS_GRAPHICS_INVALID_MONITOR_SOURCEMODESET cpu_to_le32(0xC01E0321)
+#define STATUS_GRAPHICS_INVALID_MONITOR_SOURCE_MODE cpu_to_le32(0xC01E0322)
+#define STATUS_GRAPHICS_NO_RECOMMENDED_FUNCTIONAL_VIDPN cpu_to_le32(0xC01E0323)
+#define STATUS_GRAPHICS_MODE_ID_MUST_BE_UNIQUE cpu_to_le32(0xC01E0324)
+#define STATUS_GRAPHICS_EMPTY_ADAPTER_MONITOR_MODE_SUPPORT_INTERSECTION cpu_to_le32(0xC01E0325)
+#define STATUS_GRAPHICS_VIDEO_PRESENT_TARGETS_LESS_THAN_SOURCES cpu_to_le32(0xC01E0326)
+#define STATUS_GRAPHICS_PATH_NOT_IN_TOPOLOGY cpu_to_le32(0xC01E0327)
+#define STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_SOURCE cpu_to_le32(0xC01E0328)
+#define STATUS_GRAPHICS_ADAPTER_MUST_HAVE_AT_LEAST_ONE_TARGET cpu_to_le32(0xC01E0329)
+#define STATUS_GRAPHICS_INVALID_MONITORDESCRIPTORSET cpu_to_le32(0xC01E032A)
+#define STATUS_GRAPHICS_INVALID_MONITORDESCRIPTOR cpu_to_le32(0xC01E032B)
+#define STATUS_GRAPHICS_MONITORDESCRIPTOR_NOT_IN_SET cpu_to_le32(0xC01E032C)
+#define STATUS_GRAPHICS_MONITORDESCRIPTOR_ALREADY_IN_SET cpu_to_le32(0xC01E032D)
+#define STATUS_GRAPHICS_MONITORDESCRIPTOR_ID_MUST_BE_UNIQUE cpu_to_le32(0xC01E032E)
+#define STATUS_GRAPHICS_INVALID_VIDPN_TARGET_SUBSET_TYPE cpu_to_le32(0xC01E032F)
+#define STATUS_GRAPHICS_RESOURCES_NOT_RELATED cpu_to_le32(0xC01E0330)
+#define STATUS_GRAPHICS_SOURCE_ID_MUST_BE_UNIQUE cpu_to_le32(0xC01E0331)
+#define STATUS_GRAPHICS_TARGET_ID_MUST_BE_UNIQUE cpu_to_le32(0xC01E0332)
+#define STATUS_GRAPHICS_NO_AVAILABLE_VIDPN_TARGET cpu_to_le32(0xC01E0333)
+#define STATUS_GRAPHICS_MONITOR_COULD_NOT_BE_ASSOCIATED_WITH_ADAPTER cpu_to_le32(0xC01E0334)
+#define STATUS_GRAPHICS_NO_VIDPNMGR cpu_to_le32(0xC01E0335)
+#define STATUS_GRAPHICS_NO_ACTIVE_VIDPN cpu_to_le32(0xC01E0336)
+#define STATUS_GRAPHICS_STALE_VIDPN_TOPOLOGY cpu_to_le32(0xC01E0337)
+#define STATUS_GRAPHICS_MONITOR_NOT_CONNECTED cpu_to_le32(0xC01E0338)
+#define STATUS_GRAPHICS_SOURCE_NOT_IN_TOPOLOGY cpu_to_le32(0xC01E0339)
+#define STATUS_GRAPHICS_INVALID_PRIMARYSURFACE_SIZE cpu_to_le32(0xC01E033A)
+#define STATUS_GRAPHICS_INVALID_VISIBLEREGION_SIZE cpu_to_le32(0xC01E033B)
+#define STATUS_GRAPHICS_INVALID_STRIDE cpu_to_le32(0xC01E033C)
+#define STATUS_GRAPHICS_INVALID_PIXELFORMAT cpu_to_le32(0xC01E033D)
+#define STATUS_GRAPHICS_INVALID_COLORBASIS cpu_to_le32(0xC01E033E)
+#define STATUS_GRAPHICS_INVALID_PIXELVALUEACCESSMODE cpu_to_le32(0xC01E033F)
+#define STATUS_GRAPHICS_TARGET_NOT_IN_TOPOLOGY cpu_to_le32(0xC01E0340)
+#define STATUS_GRAPHICS_NO_DISPLAY_MODE_MANAGEMENT_SUPPORT cpu_to_le32(0xC01E0341)
+#define STATUS_GRAPHICS_VIDPN_SOURCE_IN_USE cpu_to_le32(0xC01E0342)
+#define STATUS_GRAPHICS_CANT_ACCESS_ACTIVE_VIDPN cpu_to_le32(0xC01E0343)
+#define STATUS_GRAPHICS_INVALID_PATH_IMPORTANCE_ORDINAL cpu_to_le32(0xC01E0344)
+#define STATUS_GRAPHICS_INVALID_PATH_CONTENT_GEOMETRY_TRANSFORMATION cpu_to_le32(0xC01E0345)
+#define STATUS_GRAPHICS_PATH_CONTENT_GEOMETRY_TRANSFORMATION_NOT_SUPPORTED cpu_to_le32(0xC01E0346)
+#define STATUS_GRAPHICS_INVALID_GAMMA_RAMP cpu_to_le32(0xC01E0347)
+#define STATUS_GRAPHICS_GAMMA_RAMP_NOT_SUPPORTED cpu_to_le32(0xC01E0348)
+#define STATUS_GRAPHICS_MULTISAMPLING_NOT_SUPPORTED cpu_to_le32(0xC01E0349)
+#define STATUS_GRAPHICS_MODE_NOT_IN_MODESET cpu_to_le32(0xC01E034A)
+#define STATUS_GRAPHICS_INVALID_VIDPN_TOPOLOGY_RECOMMENDATION_REASON cpu_to_le32(0xC01E034D)
+#define STATUS_GRAPHICS_INVALID_PATH_CONTENT_TYPE cpu_to_le32(0xC01E034E)
+#define STATUS_GRAPHICS_INVALID_COPYPROTECTION_TYPE cpu_to_le32(0xC01E034F)
+#define STATUS_GRAPHICS_UNASSIGNED_MODESET_ALREADY_EXISTS cpu_to_le32(0xC01E0350)
+#define STATUS_GRAPHICS_INVALID_SCANLINE_ORDERING cpu_to_le32(0xC01E0352)
+#define STATUS_GRAPHICS_TOPOLOGY_CHANGES_NOT_ALLOWED cpu_to_le32(0xC01E0353)
+#define STATUS_GRAPHICS_NO_AVAILABLE_IMPORTANCE_ORDINALS cpu_to_le32(0xC01E0354)
+#define STATUS_GRAPHICS_INCOMPATIBLE_PRIVATE_FORMAT cpu_to_le32(0xC01E0355)
+#define STATUS_GRAPHICS_INVALID_MODE_PRUNING_ALGORITHM cpu_to_le32(0xC01E0356)
+#define STATUS_GRAPHICS_INVALID_MONITOR_CAPABILITY_ORIGIN cpu_to_le32(0xC01E0357)
+#define STATUS_GRAPHICS_INVALID_MONITOR_FREQUENCYRANGE_CONSTRAINT cpu_to_le32(0xC01E0358)
+#define STATUS_GRAPHICS_MAX_NUM_PATHS_REACHED cpu_to_le32(0xC01E0359)
+#define STATUS_GRAPHICS_CANCEL_VIDPN_TOPOLOGY_AUGMENTATION cpu_to_le32(0xC01E035A)
+#define STATUS_GRAPHICS_INVALID_CLIENT_TYPE cpu_to_le32(0xC01E035B)
+#define STATUS_GRAPHICS_CLIENTVIDPN_NOT_SET cpu_to_le32(0xC01E035C)
+#define STATUS_GRAPHICS_SPECIFIED_CHILD_ALREADY_CONNECTED cpu_to_le32(0xC01E0400)
+#define STATUS_GRAPHICS_CHILD_DESCRIPTOR_NOT_SUPPORTED cpu_to_le32(0xC01E0401)
+#define STATUS_GRAPHICS_NOT_A_LINKED_ADAPTER cpu_to_le32(0xC01E0430)
+#define STATUS_GRAPHICS_LEADLINK_NOT_ENUMERATED cpu_to_le32(0xC01E0431)
+#define STATUS_GRAPHICS_CHAINLINKS_NOT_ENUMERATED cpu_to_le32(0xC01E0432)
+#define STATUS_GRAPHICS_ADAPTER_CHAIN_NOT_READY cpu_to_le32(0xC01E0433)
+#define STATUS_GRAPHICS_CHAINLINKS_NOT_STARTED cpu_to_le32(0xC01E0434)
+#define STATUS_GRAPHICS_CHAINLINKS_NOT_POWERED_ON cpu_to_le32(0xC01E0435)
+#define STATUS_GRAPHICS_INCONSISTENT_DEVICE_LINK_STATE cpu_to_le32(0xC01E0436)
+#define STATUS_GRAPHICS_NOT_POST_DEVICE_DRIVER cpu_to_le32(0xC01E0438)
+#define STATUS_GRAPHICS_ADAPTER_ACCESS_NOT_EXCLUDED cpu_to_le32(0xC01E043B)
+#define STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_COPP_SEMANTICS cpu_to_le32(0xC01E051C)
+#define STATUS_GRAPHICS_OPM_INVALID_INFORMATION_REQUEST cpu_to_le32(0xC01E051D)
+#define STATUS_GRAPHICS_OPM_DRIVER_INTERNAL_ERROR cpu_to_le32(0xC01E051E)
+#define STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_DOES_NOT_HAVE_OPM_SEMANTICS cpu_to_le32(0xC01E051F)
+#define STATUS_GRAPHICS_OPM_SIGNALING_NOT_SUPPORTED cpu_to_le32(0xC01E0520)
+#define STATUS_GRAPHICS_OPM_INVALID_CONFIGURATION_REQUEST cpu_to_le32(0xC01E0521)
+#define STATUS_GRAPHICS_OPM_NOT_SUPPORTED cpu_to_le32(0xC01E0500)
+#define STATUS_GRAPHICS_COPP_NOT_SUPPORTED cpu_to_le32(0xC01E0501)
+#define STATUS_GRAPHICS_UAB_NOT_SUPPORTED cpu_to_le32(0xC01E0502)
+#define STATUS_GRAPHICS_OPM_INVALID_ENCRYPTED_PARAMETERS cpu_to_le32(0xC01E0503)
+#define STATUS_GRAPHICS_OPM_PARAMETER_ARRAY_TOO_SMALL cpu_to_le32(0xC01E0504)
+#define STATUS_GRAPHICS_OPM_NO_PROTECTED_OUTPUTS_EXIST cpu_to_le32(0xC01E0505)
+#define STATUS_GRAPHICS_PVP_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME cpu_to_le32(0xC01E0506)
+#define STATUS_GRAPHICS_PVP_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP cpu_to_le32(0xC01E0507)
+#define STATUS_GRAPHICS_PVP_MIRRORING_DEVICES_NOT_SUPPORTED cpu_to_le32(0xC01E0508)
+#define STATUS_GRAPHICS_OPM_INVALID_POINTER cpu_to_le32(0xC01E050A)
+#define STATUS_GRAPHICS_OPM_INTERNAL_ERROR cpu_to_le32(0xC01E050B)
+#define STATUS_GRAPHICS_OPM_INVALID_HANDLE cpu_to_le32(0xC01E050C)
+#define STATUS_GRAPHICS_PVP_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE cpu_to_le32(0xC01E050D)
+#define STATUS_GRAPHICS_PVP_INVALID_CERTIFICATE_LENGTH cpu_to_le32(0xC01E050E)
+#define STATUS_GRAPHICS_OPM_SPANNING_MODE_ENABLED cpu_to_le32(0xC01E050F)
+#define STATUS_GRAPHICS_OPM_THEATER_MODE_ENABLED cpu_to_le32(0xC01E0510)
+#define STATUS_GRAPHICS_PVP_HFS_FAILED cpu_to_le32(0xC01E0511)
+#define STATUS_GRAPHICS_OPM_INVALID_SRM cpu_to_le32(0xC01E0512)
+#define STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_HDCP cpu_to_le32(0xC01E0513)
+#define STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_ACP cpu_to_le32(0xC01E0514)
+#define STATUS_GRAPHICS_OPM_OUTPUT_DOES_NOT_SUPPORT_CGMSA cpu_to_le32(0xC01E0515)
+#define STATUS_GRAPHICS_OPM_HDCP_SRM_NEVER_SET cpu_to_le32(0xC01E0516)
+#define STATUS_GRAPHICS_OPM_RESOLUTION_TOO_HIGH cpu_to_le32(0xC01E0517)
+#define STATUS_GRAPHICS_OPM_ALL_HDCP_HARDWARE_ALREADY_IN_USE cpu_to_le32(0xC01E0518)
+#define STATUS_GRAPHICS_OPM_PROTECTED_OUTPUT_NO_LONGER_EXISTS cpu_to_le32(0xC01E051A)
+#define STATUS_GRAPHICS_OPM_SESSION_TYPE_CHANGE_IN_PROGRESS cpu_to_le32(0xC01E051B)
+#define STATUS_GRAPHICS_I2C_NOT_SUPPORTED cpu_to_le32(0xC01E0580)
+#define STATUS_GRAPHICS_I2C_DEVICE_DOES_NOT_EXIST cpu_to_le32(0xC01E0581)
+#define STATUS_GRAPHICS_I2C_ERROR_TRANSMITTING_DATA cpu_to_le32(0xC01E0582)
+#define STATUS_GRAPHICS_I2C_ERROR_RECEIVING_DATA cpu_to_le32(0xC01E0583)
+#define STATUS_GRAPHICS_DDCCI_VCP_NOT_SUPPORTED cpu_to_le32(0xC01E0584)
+#define STATUS_GRAPHICS_DDCCI_INVALID_DATA cpu_to_le32(0xC01E0585)
+#define STATUS_GRAPHICS_DDCCI_MONITOR_RETURNED_INVALID_TIMING_STATUS_BYTE cpu_to_le32(0xC01E0586)
+#define STATUS_GRAPHICS_DDCCI_INVALID_CAPABILITIES_STRING cpu_to_le32(0xC01E0587)
+#define STATUS_GRAPHICS_MCA_INTERNAL_ERROR cpu_to_le32(0xC01E0588)
+#define STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_COMMAND cpu_to_le32(0xC01E0589)
+#define STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_LENGTH cpu_to_le32(0xC01E058A)
+#define STATUS_GRAPHICS_DDCCI_INVALID_MESSAGE_CHECKSUM cpu_to_le32(0xC01E058B)
+#define STATUS_GRAPHICS_INVALID_PHYSICAL_MONITOR_HANDLE cpu_to_le32(0xC01E058C)
+#define STATUS_GRAPHICS_MONITOR_NO_LONGER_EXISTS cpu_to_le32(0xC01E058D)
+#define STATUS_GRAPHICS_ONLY_CONSOLE_SESSION_SUPPORTED cpu_to_le32(0xC01E05E0)
+#define STATUS_GRAPHICS_NO_DISPLAY_DEVICE_CORRESPONDS_TO_NAME cpu_to_le32(0xC01E05E1)
+#define STATUS_GRAPHICS_DISPLAY_DEVICE_NOT_ATTACHED_TO_DESKTOP cpu_to_le32(0xC01E05E2)
+#define STATUS_GRAPHICS_MIRRORING_DEVICES_NOT_SUPPORTED cpu_to_le32(0xC01E05E3)
+#define STATUS_GRAPHICS_INVALID_POINTER cpu_to_le32(0xC01E05E4)
+#define STATUS_GRAPHICS_NO_MONITORS_CORRESPOND_TO_DISPLAY_DEVICE cpu_to_le32(0xC01E05E5)
+#define STATUS_GRAPHICS_PARAMETER_ARRAY_TOO_SMALL cpu_to_le32(0xC01E05E6)
+#define STATUS_GRAPHICS_INTERNAL_ERROR cpu_to_le32(0xC01E05E7)
+#define STATUS_GRAPHICS_SESSION_TYPE_CHANGE_IN_PROGRESS cpu_to_le32(0xC01E05E8)
+#define STATUS_FVE_LOCKED_VOLUME cpu_to_le32(0xC0210000)
+#define STATUS_FVE_NOT_ENCRYPTED cpu_to_le32(0xC0210001)
+#define STATUS_FVE_BAD_INFORMATION cpu_to_le32(0xC0210002)
+#define STATUS_FVE_TOO_SMALL cpu_to_le32(0xC0210003)
+#define STATUS_FVE_FAILED_WRONG_FS cpu_to_le32(0xC0210004)
+#define STATUS_FVE_FAILED_BAD_FS cpu_to_le32(0xC0210005)
+#define STATUS_FVE_FS_NOT_EXTENDED cpu_to_le32(0xC0210006)
+#define STATUS_FVE_FS_MOUNTED cpu_to_le32(0xC0210007)
+#define STATUS_FVE_NO_LICENSE cpu_to_le32(0xC0210008)
+#define STATUS_FVE_ACTION_NOT_ALLOWED cpu_to_le32(0xC0210009)
+#define STATUS_FVE_BAD_DATA cpu_to_le32(0xC021000A)
+#define STATUS_FVE_VOLUME_NOT_BOUND cpu_to_le32(0xC021000B)
+#define STATUS_FVE_NOT_DATA_VOLUME cpu_to_le32(0xC021000C)
+#define STATUS_FVE_CONV_READ_ERROR cpu_to_le32(0xC021000D)
+#define STATUS_FVE_CONV_WRITE_ERROR cpu_to_le32(0xC021000E)
+#define STATUS_FVE_OVERLAPPED_UPDATE cpu_to_le32(0xC021000F)
+#define STATUS_FVE_FAILED_SECTOR_SIZE cpu_to_le32(0xC0210010)
+#define STATUS_FVE_FAILED_AUTHENTICATION cpu_to_le32(0xC0210011)
+#define STATUS_FVE_NOT_OS_VOLUME cpu_to_le32(0xC0210012)
+#define STATUS_FVE_KEYFILE_NOT_FOUND cpu_to_le32(0xC0210013)
+#define STATUS_FVE_KEYFILE_INVALID cpu_to_le32(0xC0210014)
+#define STATUS_FVE_KEYFILE_NO_VMK cpu_to_le32(0xC0210015)
+#define STATUS_FVE_TPM_DISABLED cpu_to_le32(0xC0210016)
+#define STATUS_FVE_TPM_SRK_AUTH_NOT_ZERO cpu_to_le32(0xC0210017)
+#define STATUS_FVE_TPM_INVALID_PCR cpu_to_le32(0xC0210018)
+#define STATUS_FVE_TPM_NO_VMK cpu_to_le32(0xC0210019)
+#define STATUS_FVE_PIN_INVALID cpu_to_le32(0xC021001A)
+#define STATUS_FVE_AUTH_INVALID_APPLICATION cpu_to_le32(0xC021001B)
+#define STATUS_FVE_AUTH_INVALID_CONFIG cpu_to_le32(0xC021001C)
+#define STATUS_FVE_DEBUGGER_ENABLED cpu_to_le32(0xC021001D)
+#define STATUS_FVE_DRY_RUN_FAILED cpu_to_le32(0xC021001E)
+#define STATUS_FVE_BAD_METADATA_POINTER cpu_to_le32(0xC021001F)
+#define STATUS_FVE_OLD_METADATA_COPY cpu_to_le32(0xC0210020)
+#define STATUS_FVE_REBOOT_REQUIRED cpu_to_le32(0xC0210021)
+#define STATUS_FVE_RAW_ACCESS cpu_to_le32(0xC0210022)
+#define STATUS_FVE_RAW_BLOCKED cpu_to_le32(0xC0210023)
+#define STATUS_FWP_CALLOUT_NOT_FOUND cpu_to_le32(0xC0220001)
+#define STATUS_FWP_CONDITION_NOT_FOUND cpu_to_le32(0xC0220002)
+#define STATUS_FWP_FILTER_NOT_FOUND cpu_to_le32(0xC0220003)
+#define STATUS_FWP_LAYER_NOT_FOUND cpu_to_le32(0xC0220004)
+#define STATUS_FWP_PROVIDER_NOT_FOUND cpu_to_le32(0xC0220005)
+#define STATUS_FWP_PROVIDER_CONTEXT_NOT_FOUND cpu_to_le32(0xC0220006)
+#define STATUS_FWP_SUBLAYER_NOT_FOUND cpu_to_le32(0xC0220007)
+#define STATUS_FWP_NOT_FOUND cpu_to_le32(0xC0220008)
+#define STATUS_FWP_ALREADY_EXISTS cpu_to_le32(0xC0220009)
+#define STATUS_FWP_IN_USE cpu_to_le32(0xC022000A)
+#define STATUS_FWP_DYNAMIC_SESSION_IN_PROGRESS cpu_to_le32(0xC022000B)
+#define STATUS_FWP_WRONG_SESSION cpu_to_le32(0xC022000C)
+#define STATUS_FWP_NO_TXN_IN_PROGRESS cpu_to_le32(0xC022000D)
+#define STATUS_FWP_TXN_IN_PROGRESS cpu_to_le32(0xC022000E)
+#define STATUS_FWP_TXN_ABORTED cpu_to_le32(0xC022000F)
+#define STATUS_FWP_SESSION_ABORTED cpu_to_le32(0xC0220010)
+#define STATUS_FWP_INCOMPATIBLE_TXN cpu_to_le32(0xC0220011)
+#define STATUS_FWP_TIMEOUT cpu_to_le32(0xC0220012)
+#define STATUS_FWP_NET_EVENTS_DISABLED cpu_to_le32(0xC0220013)
+#define STATUS_FWP_INCOMPATIBLE_LAYER cpu_to_le32(0xC0220014)
+#define STATUS_FWP_KM_CLIENTS_ONLY cpu_to_le32(0xC0220015)
+#define STATUS_FWP_LIFETIME_MISMATCH cpu_to_le32(0xC0220016)
+#define STATUS_FWP_BUILTIN_OBJECT cpu_to_le32(0xC0220017)
+#define STATUS_FWP_TOO_MANY_BOOTTIME_FILTERS cpu_to_le32(0xC0220018)
+#define STATUS_FWP_TOO_MANY_CALLOUTS cpu_to_le32(0xC0220018)
+#define STATUS_FWP_NOTIFICATION_DROPPED cpu_to_le32(0xC0220019)
+#define STATUS_FWP_TRAFFIC_MISMATCH cpu_to_le32(0xC022001A)
+#define STATUS_FWP_INCOMPATIBLE_SA_STATE cpu_to_le32(0xC022001B)
+#define STATUS_FWP_NULL_POINTER cpu_to_le32(0xC022001C)
+#define STATUS_FWP_INVALID_ENUMERATOR cpu_to_le32(0xC022001D)
+#define STATUS_FWP_INVALID_FLAGS cpu_to_le32(0xC022001E)
+#define STATUS_FWP_INVALID_NET_MASK cpu_to_le32(0xC022001F)
+#define STATUS_FWP_INVALID_RANGE cpu_to_le32(0xC0220020)
+#define STATUS_FWP_INVALID_INTERVAL cpu_to_le32(0xC0220021)
+#define STATUS_FWP_ZERO_LENGTH_ARRAY cpu_to_le32(0xC0220022)
+#define STATUS_FWP_NULL_DISPLAY_NAME cpu_to_le32(0xC0220023)
+#define STATUS_FWP_INVALID_ACTION_TYPE cpu_to_le32(0xC0220024)
+#define STATUS_FWP_INVALID_WEIGHT cpu_to_le32(0xC0220025)
+#define STATUS_FWP_MATCH_TYPE_MISMATCH cpu_to_le32(0xC0220026)
+#define STATUS_FWP_TYPE_MISMATCH cpu_to_le32(0xC0220027)
+#define STATUS_FWP_OUT_OF_BOUNDS cpu_to_le32(0xC0220028)
+#define STATUS_FWP_RESERVED cpu_to_le32(0xC0220029)
+#define STATUS_FWP_DUPLICATE_CONDITION cpu_to_le32(0xC022002A)
+#define STATUS_FWP_DUPLICATE_KEYMOD cpu_to_le32(0xC022002B)
+#define STATUS_FWP_ACTION_INCOMPATIBLE_WITH_LAYER cpu_to_le32(0xC022002C)
+#define STATUS_FWP_ACTION_INCOMPATIBLE_WITH_SUBLAYER cpu_to_le32(0xC022002D)
+#define STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_LAYER cpu_to_le32(0xC022002E)
+#define STATUS_FWP_CONTEXT_INCOMPATIBLE_WITH_CALLOUT cpu_to_le32(0xC022002F)
+#define STATUS_FWP_INCOMPATIBLE_AUTH_METHOD cpu_to_le32(0xC0220030)
+#define STATUS_FWP_INCOMPATIBLE_DH_GROUP cpu_to_le32(0xC0220031)
+#define STATUS_FWP_EM_NOT_SUPPORTED cpu_to_le32(0xC0220032)
+#define STATUS_FWP_NEVER_MATCH cpu_to_le32(0xC0220033)
+#define STATUS_FWP_PROVIDER_CONTEXT_MISMATCH cpu_to_le32(0xC0220034)
+#define STATUS_FWP_INVALID_PARAMETER cpu_to_le32(0xC0220035)
+#define STATUS_FWP_TOO_MANY_SUBLAYERS cpu_to_le32(0xC0220036)
+#define STATUS_FWP_CALLOUT_NOTIFICATION_FAILED cpu_to_le32(0xC0220037)
+#define STATUS_FWP_INCOMPATIBLE_AUTH_CONFIG cpu_to_le32(0xC0220038)
+#define STATUS_FWP_INCOMPATIBLE_CIPHER_CONFIG cpu_to_le32(0xC0220039)
+#define STATUS_FWP_TCPIP_NOT_READY cpu_to_le32(0xC0220100)
+#define STATUS_FWP_INJECT_HANDLE_CLOSING cpu_to_le32(0xC0220101)
+#define STATUS_FWP_INJECT_HANDLE_STALE cpu_to_le32(0xC0220102)
+#define STATUS_FWP_CANNOT_PEND cpu_to_le32(0xC0220103)
+#define STATUS_NDIS_CLOSING cpu_to_le32(0xC0230002)
+#define STATUS_NDIS_BAD_VERSION cpu_to_le32(0xC0230004)
+#define STATUS_NDIS_BAD_CHARACTERISTICS cpu_to_le32(0xC0230005)
+#define STATUS_NDIS_ADAPTER_NOT_FOUND cpu_to_le32(0xC0230006)
+#define STATUS_NDIS_OPEN_FAILED cpu_to_le32(0xC0230007)
+#define STATUS_NDIS_DEVICE_FAILED cpu_to_le32(0xC0230008)
+#define STATUS_NDIS_MULTICAST_FULL cpu_to_le32(0xC0230009)
+#define STATUS_NDIS_MULTICAST_EXISTS cpu_to_le32(0xC023000A)
+#define STATUS_NDIS_MULTICAST_NOT_FOUND cpu_to_le32(0xC023000B)
+#define STATUS_NDIS_REQUEST_ABORTED cpu_to_le32(0xC023000C)
+#define STATUS_NDIS_RESET_IN_PROGRESS cpu_to_le32(0xC023000D)
+#define STATUS_NDIS_INVALID_PACKET cpu_to_le32(0xC023000F)
+#define STATUS_NDIS_INVALID_DEVICE_REQUEST cpu_to_le32(0xC0230010)
+#define STATUS_NDIS_ADAPTER_NOT_READY cpu_to_le32(0xC0230011)
+#define STATUS_NDIS_INVALID_LENGTH cpu_to_le32(0xC0230014)
+#define STATUS_NDIS_INVALID_DATA cpu_to_le32(0xC0230015)
+#define STATUS_NDIS_BUFFER_TOO_SHORT cpu_to_le32(0xC0230016)
+#define STATUS_NDIS_INVALID_OID cpu_to_le32(0xC0230017)
+#define STATUS_NDIS_ADAPTER_REMOVED cpu_to_le32(0xC0230018)
+#define STATUS_NDIS_UNSUPPORTED_MEDIA cpu_to_le32(0xC0230019)
+#define STATUS_NDIS_GROUP_ADDRESS_IN_USE cpu_to_le32(0xC023001A)
+#define STATUS_NDIS_FILE_NOT_FOUND cpu_to_le32(0xC023001B)
+#define STATUS_NDIS_ERROR_READING_FILE cpu_to_le32(0xC023001C)
+#define STATUS_NDIS_ALREADY_MAPPED cpu_to_le32(0xC023001D)
+#define STATUS_NDIS_RESOURCE_CONFLICT cpu_to_le32(0xC023001E)
+#define STATUS_NDIS_MEDIA_DISCONNECTED cpu_to_le32(0xC023001F)
+#define STATUS_NDIS_INVALID_ADDRESS cpu_to_le32(0xC0230022)
+#define STATUS_NDIS_PAUSED cpu_to_le32(0xC023002A)
+#define STATUS_NDIS_INTERFACE_NOT_FOUND cpu_to_le32(0xC023002B)
+#define STATUS_NDIS_UNSUPPORTED_REVISION cpu_to_le32(0xC023002C)
+#define STATUS_NDIS_INVALID_PORT cpu_to_le32(0xC023002D)
+#define STATUS_NDIS_INVALID_PORT_STATE cpu_to_le32(0xC023002E)
+#define STATUS_NDIS_LOW_POWER_STATE cpu_to_le32(0xC023002F)
+#define STATUS_NDIS_NOT_SUPPORTED cpu_to_le32(0xC02300BB)
+#define STATUS_NDIS_DOT11_AUTO_CONFIG_ENABLED cpu_to_le32(0xC0232000)
+#define STATUS_NDIS_DOT11_MEDIA_IN_USE cpu_to_le32(0xC0232001)
+#define STATUS_NDIS_DOT11_POWER_STATE_INVALID cpu_to_le32(0xC0232002)
+#define STATUS_IPSEC_BAD_SPI cpu_to_le32(0xC0360001)
+#define STATUS_IPSEC_SA_LIFETIME_EXPIRED cpu_to_le32(0xC0360002)
+#define STATUS_IPSEC_WRONG_SA cpu_to_le32(0xC0360003)
+#define STATUS_IPSEC_REPLAY_CHECK_FAILED cpu_to_le32(0xC0360004)
+#define STATUS_IPSEC_INVALID_PACKET cpu_to_le32(0xC0360005)
+#define STATUS_IPSEC_INTEGRITY_CHECK_FAILED cpu_to_le32(0xC0360006)
+#define STATUS_IPSEC_CLEAR_TEXT_DROP cpu_to_le32(0xC0360007)
diff --git a/fs/cifs/smb2transport.c b/fs/cifs/smb2transport.c
index 7b351c65ee46..d1181572758b 100644
--- a/fs/cifs/smb2transport.c
+++ b/fs/cifs/smb2transport.c
@@ -576,6 +576,7 @@ smb2_mid_entry_alloc(const struct smb2_sync_hdr *shdr,
 		     struct TCP_Server_Info *server)
 {
 	struct mid_q_entry *temp;
+	unsigned int credits = le16_to_cpu(shdr->CreditCharge);
 
 	if (server == NULL) {
 		cifs_dbg(VFS, "Null TCP session in smb2_mid_entry_alloc\n");
@@ -586,6 +587,7 @@ smb2_mid_entry_alloc(const struct smb2_sync_hdr *shdr,
 	memset(temp, 0, sizeof(struct mid_q_entry));
 	kref_init(&temp->refcount);
 	temp->mid = le64_to_cpu(shdr->MessageId);
+	temp->credits = credits > 0 ? credits : 1;
 	temp->pid = current->pid;
 	temp->command = shdr->Command; /* Always LE */
 	temp->when_alloc = jiffies;
@@ -600,6 +602,8 @@ smb2_mid_entry_alloc(const struct smb2_sync_hdr *shdr,
 
 	atomic_inc(&midCount);
 	temp->mid_state = MID_REQUEST_ALLOCATED;
+	trace_smb3_cmd_enter(shdr->TreeId, shdr->SessionId,
+		le16_to_cpu(shdr->Command), temp->mid);
 	return temp;
 }
 
@@ -615,6 +619,10 @@ smb2_get_mid_entry(struct cifs_ses *ses, struct smb2_sync_hdr *shdr,
 		return -EAGAIN;
 	}
 
+	if (ses->server->tcpStatus == CifsNeedNegotiate &&
+	   shdr->Command != SMB2_NEGOTIATE)
+		return -EAGAIN;
+
 	if (ses->status == CifsNew) {
 		if ((shdr->Command != SMB2_SESSION_SETUP) &&
 		    (shdr->Command != SMB2_NEGOTIATE))
@@ -634,6 +642,7 @@ smb2_get_mid_entry(struct cifs_ses *ses, struct smb2_sync_hdr *shdr,
 	spin_lock(&GlobalMid_Lock);
 	list_add_tail(&(*mid)->qhead, &ses->server->pending_mid_q);
 	spin_unlock(&GlobalMid_Lock);
+
 	return 0;
 }
 
@@ -674,13 +683,18 @@ smb2_setup_request(struct cifs_ses *ses, struct smb_rqst *rqst)
 	smb2_seq_num_into_buf(ses->server, shdr);
 
 	rc = smb2_get_mid_entry(ses, shdr, &mid);
-	if (rc)
+	if (rc) {
+		revert_current_mid_from_hdr(ses->server, shdr);
 		return ERR_PTR(rc);
+	}
+
 	rc = smb2_sign_rqst(rqst, ses->server);
 	if (rc) {
+		revert_current_mid_from_hdr(ses->server, shdr);
 		cifs_delete_mid(mid);
 		return ERR_PTR(rc);
 	}
+
 	return mid;
 }
 
@@ -692,14 +706,21 @@ smb2_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst)
 			(struct smb2_sync_hdr *)rqst->rq_iov[0].iov_base;
 	struct mid_q_entry *mid;
 
+	if (server->tcpStatus == CifsNeedNegotiate &&
+	   shdr->Command != SMB2_NEGOTIATE)
+		return ERR_PTR(-EAGAIN);
+
 	smb2_seq_num_into_buf(server, shdr);
 
 	mid = smb2_mid_entry_alloc(shdr, server);
-	if (mid == NULL)
+	if (mid == NULL) {
+		revert_current_mid_from_hdr(server, shdr);
 		return ERR_PTR(-ENOMEM);
+	}
 
 	rc = smb2_sign_rqst(rqst, server);
 	if (rc) {
+		revert_current_mid_from_hdr(server, shdr);
 		DeleteMidQEntry(mid);
 		return ERR_PTR(rc);
 	}
diff --git a/fs/cifs/smbdirect.c b/fs/cifs/smbdirect.c
index a568dac7b3a1..cd07e5301d42 100644
--- a/fs/cifs/smbdirect.c
+++ b/fs/cifs/smbdirect.c
@@ -1,17 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) 2017, Microsoft Corporation.
  *
  *   Author(s): Long Li <longli@microsoft.com>
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
  */
 #include <linux/module.h>
 #include <linux/highmem.h>
@@ -164,95 +155,6 @@ do {									\
 #define log_rdma_mr(level, fmt, args...) \
 		log_rdma(level, LOG_RDMA_MR, fmt, ##args)
 
-/*
- * Destroy the transport and related RDMA and memory resources
- * Need to go through all the pending counters and make sure on one is using
- * the transport while it is destroyed
- */
-static void smbd_destroy_rdma_work(struct work_struct *work)
-{
-	struct smbd_response *response;
-	struct smbd_connection *info =
-		container_of(work, struct smbd_connection, destroy_work);
-	unsigned long flags;
-
-	log_rdma_event(INFO, "destroying qp\n");
-	ib_drain_qp(info->id->qp);
-	rdma_destroy_qp(info->id);
-
-	/* Unblock all I/O waiting on the send queue */
-	wake_up_interruptible_all(&info->wait_send_queue);
-
-	log_rdma_event(INFO, "cancelling idle timer\n");
-	cancel_delayed_work_sync(&info->idle_timer_work);
-	log_rdma_event(INFO, "cancelling send immediate work\n");
-	cancel_delayed_work_sync(&info->send_immediate_work);
-
-	log_rdma_event(INFO, "wait for all send to finish\n");
-	wait_event(info->wait_smbd_send_pending,
-		info->smbd_send_pending == 0);
-
-	log_rdma_event(INFO, "wait for all recv to finish\n");
-	wake_up_interruptible(&info->wait_reassembly_queue);
-	wait_event(info->wait_smbd_recv_pending,
-		info->smbd_recv_pending == 0);
-
-	log_rdma_event(INFO, "wait for all send posted to IB to finish\n");
-	wait_event(info->wait_send_pending,
-		atomic_read(&info->send_pending) == 0);
-	wait_event(info->wait_send_payload_pending,
-		atomic_read(&info->send_payload_pending) == 0);
-
-	log_rdma_event(INFO, "freeing mr list\n");
-	wake_up_interruptible_all(&info->wait_mr);
-	wait_event(info->wait_for_mr_cleanup,
-		atomic_read(&info->mr_used_count) == 0);
-	destroy_mr_list(info);
-
-	/* It's not posssible for upper layer to get to reassembly */
-	log_rdma_event(INFO, "drain the reassembly queue\n");
-	do {
-		spin_lock_irqsave(&info->reassembly_queue_lock, flags);
-		response = _get_first_reassembly(info);
-		if (response) {
-			list_del(&response->list);
-			spin_unlock_irqrestore(
-				&info->reassembly_queue_lock, flags);
-			put_receive_buffer(info, response);
-		} else
-			spin_unlock_irqrestore(&info->reassembly_queue_lock, flags);
-	} while (response);
-
-	info->reassembly_data_length = 0;
-
-	log_rdma_event(INFO, "free receive buffers\n");
-	wait_event(info->wait_receive_queues,
-		info->count_receive_queue + info->count_empty_packet_queue
-			== info->receive_credit_max);
-	destroy_receive_buffers(info);
-
-	ib_free_cq(info->send_cq);
-	ib_free_cq(info->recv_cq);
-	ib_dealloc_pd(info->pd);
-	rdma_destroy_id(info->id);
-
-	/* free mempools */
-	mempool_destroy(info->request_mempool);
-	kmem_cache_destroy(info->request_cache);
-
-	mempool_destroy(info->response_mempool);
-	kmem_cache_destroy(info->response_cache);
-
-	info->transport_status = SMBD_DESTROYED;
-	wake_up_all(&info->wait_destroy);
-}
-
-static int smbd_process_disconnected(struct smbd_connection *info)
-{
-	schedule_work(&info->destroy_work);
-	return 0;
-}
-
 static void smbd_disconnect_rdma_work(struct work_struct *work)
 {
 	struct smbd_connection *info =
@@ -319,7 +221,9 @@ static int smbd_conn_upcall(
 		}
 
 		info->transport_status = SMBD_DISCONNECTED;
-		smbd_process_disconnected(info);
+		wake_up_interruptible(&info->disconn_wait);
+		wake_up_interruptible(&info->wait_reassembly_queue);
+		wake_up_interruptible_all(&info->wait_send_queue);
 		break;
 
 	default:
@@ -940,7 +844,7 @@ static int smbd_create_header(struct smbd_connection *info,
 
 	if (info->transport_status != SMBD_CONNECTED) {
 		log_outgoing(ERR, "disconnected not sending\n");
-		return -ENOENT;
+		return -EAGAIN;
 	}
 	atomic_dec(&info->send_credits);
 
@@ -990,7 +894,7 @@ static int smbd_create_header(struct smbd_connection *info,
 	request->sge[0].addr = ib_dma_map_single(info->id->device,
 						 (void *)packet,
 						 header_length,
-						 DMA_BIDIRECTIONAL);
+						 DMA_TO_DEVICE);
 	if (ib_dma_mapping_error(info->id->device, request->sge[0].addr)) {
 		mempool_free(request, info->request_mempool);
 		rc = -EIO;
@@ -1066,6 +970,7 @@ static int smbd_post_send(struct smbd_connection *info,
 				wake_up(&info->wait_send_pending);
 		}
 		smbd_disconnect_rdma_connection(info);
+		rc = -EAGAIN;
 	} else
 		/* Reset timer for idle connection after packet is sent */
 		mod_delayed_work(info->workqueue, &info->idle_timer_work,
@@ -1091,7 +996,7 @@ static int smbd_post_send_sgl(struct smbd_connection *info,
 	for_each_sg(sgl, sg, num_sgs, i) {
 		request->sge[i+1].addr =
 			ib_dma_map_page(info->id->device, sg_page(sg),
-			       sg->offset, sg->length, DMA_BIDIRECTIONAL);
+			       sg->offset, sg->length, DMA_TO_DEVICE);
 		if (ib_dma_mapping_error(
 				info->id->device, request->sge[i+1].addr)) {
 			rc = -EIO;
@@ -1478,17 +1383,97 @@ static void idle_connection_timer(struct work_struct *work)
 			info->keep_alive_interval*HZ);
 }
 
-/* Destroy this SMBD connection, called from upper layer */
-void smbd_destroy(struct smbd_connection *info)
+/*
+ * Destroy the transport and related RDMA and memory resources
+ * Need to go through all the pending counters and make sure on one is using
+ * the transport while it is destroyed
+ */
+void smbd_destroy(struct TCP_Server_Info *server)
 {
+	struct smbd_connection *info = server->smbd_conn;
+	struct smbd_response *response;
+	unsigned long flags;
+
+	if (!info) {
+		log_rdma_event(INFO, "rdma session already destroyed\n");
+		return;
+	}
+
 	log_rdma_event(INFO, "destroying rdma session\n");
+	if (info->transport_status != SMBD_DISCONNECTED) {
+		rdma_disconnect(server->smbd_conn->id);
+		log_rdma_event(INFO, "wait for transport being disconnected\n");
+		wait_event_interruptible(
+			info->disconn_wait,
+			info->transport_status == SMBD_DISCONNECTED);
+	}
 
-	/* Kick off the disconnection process */
-	smbd_disconnect_rdma_connection(info);
+	log_rdma_event(INFO, "destroying qp\n");
+	ib_drain_qp(info->id->qp);
+	rdma_destroy_qp(info->id);
+
+	log_rdma_event(INFO, "cancelling idle timer\n");
+	cancel_delayed_work_sync(&info->idle_timer_work);
+	log_rdma_event(INFO, "cancelling send immediate work\n");
+	cancel_delayed_work_sync(&info->send_immediate_work);
+
+	log_rdma_event(INFO, "wait for all send posted to IB to finish\n");
+	wait_event(info->wait_send_pending,
+		atomic_read(&info->send_pending) == 0);
+	wait_event(info->wait_send_payload_pending,
+		atomic_read(&info->send_payload_pending) == 0);
+
+	/* It's not posssible for upper layer to get to reassembly */
+	log_rdma_event(INFO, "drain the reassembly queue\n");
+	do {
+		spin_lock_irqsave(&info->reassembly_queue_lock, flags);
+		response = _get_first_reassembly(info);
+		if (response) {
+			list_del(&response->list);
+			spin_unlock_irqrestore(
+				&info->reassembly_queue_lock, flags);
+			put_receive_buffer(info, response);
+		} else
+			spin_unlock_irqrestore(
+				&info->reassembly_queue_lock, flags);
+	} while (response);
+	info->reassembly_data_length = 0;
 
-	log_rdma_event(INFO, "wait for transport being destroyed\n");
-	wait_event(info->wait_destroy,
-		info->transport_status == SMBD_DESTROYED);
+	log_rdma_event(INFO, "free receive buffers\n");
+	wait_event(info->wait_receive_queues,
+		info->count_receive_queue + info->count_empty_packet_queue
+			== info->receive_credit_max);
+	destroy_receive_buffers(info);
+
+	/*
+	 * For performance reasons, memory registration and deregistration
+	 * are not locked by srv_mutex. It is possible some processes are
+	 * blocked on transport srv_mutex while holding memory registration.
+	 * Release the transport srv_mutex to allow them to hit the failure
+	 * path when sending data, and then release memory registartions.
+	 */
+	log_rdma_event(INFO, "freeing mr list\n");
+	wake_up_interruptible_all(&info->wait_mr);
+	while (atomic_read(&info->mr_used_count)) {
+		mutex_unlock(&server->srv_mutex);
+		msleep(1000);
+		mutex_lock(&server->srv_mutex);
+	}
+	destroy_mr_list(info);
+
+	ib_free_cq(info->send_cq);
+	ib_free_cq(info->recv_cq);
+	ib_dealloc_pd(info->pd);
+	rdma_destroy_id(info->id);
+
+	/* free mempools */
+	mempool_destroy(info->request_mempool);
+	kmem_cache_destroy(info->request_cache);
+
+	mempool_destroy(info->response_mempool);
+	kmem_cache_destroy(info->response_cache);
+
+	info->transport_status = SMBD_DESTROYED;
 
 	destroy_workqueue(info->workqueue);
 	kfree(info);
@@ -1513,17 +1498,9 @@ int smbd_reconnect(struct TCP_Server_Info *server)
 	 */
 	if (server->smbd_conn->transport_status == SMBD_CONNECTED) {
 		log_rdma_event(INFO, "disconnecting transport\n");
-		smbd_disconnect_rdma_connection(server->smbd_conn);
+		smbd_destroy(server);
 	}
 
-	/* wait until the transport is destroyed */
-	if (!wait_event_timeout(server->smbd_conn->wait_destroy,
-		server->smbd_conn->transport_status == SMBD_DESTROYED, 5*HZ))
-		return -EAGAIN;
-
-	destroy_workqueue(server->smbd_conn->workqueue);
-	kfree(server->smbd_conn);
-
 create_conn:
 	log_rdma_event(INFO, "creating rdma session\n");
 	server->smbd_conn = smbd_get_connection(
@@ -1550,7 +1527,7 @@ static int allocate_caches_and_workqueue(struct smbd_connection *info)
 	char name[MAX_NAME_LEN];
 	int rc;
 
-	snprintf(name, MAX_NAME_LEN, "smbd_request_%p", info);
+	scnprintf(name, MAX_NAME_LEN, "smbd_request_%p", info);
 	info->request_cache =
 		kmem_cache_create(
 			name,
@@ -1566,7 +1543,7 @@ static int allocate_caches_and_workqueue(struct smbd_connection *info)
 	if (!info->request_mempool)
 		goto out1;
 
-	snprintf(name, MAX_NAME_LEN, "smbd_response_%p", info);
+	scnprintf(name, MAX_NAME_LEN, "smbd_response_%p", info);
 	info->response_cache =
 		kmem_cache_create(
 			name,
@@ -1582,7 +1559,7 @@ static int allocate_caches_and_workqueue(struct smbd_connection *info)
 	if (!info->response_mempool)
 		goto out3;
 
-	snprintf(name, MAX_NAME_LEN, "smbd_%p", info);
+	scnprintf(name, MAX_NAME_LEN, "smbd_%p", info);
 	info->workqueue = create_workqueue(name);
 	if (!info->workqueue)
 		goto out4;
@@ -1739,12 +1716,13 @@ static struct smbd_connection *_smbd_get_connection(
 	conn_param.retry_count = SMBD_CM_RETRY;
 	conn_param.rnr_retry_count = SMBD_CM_RNR_RETRY;
 	conn_param.flow_control = 0;
-	init_waitqueue_head(&info->wait_destroy);
 
 	log_rdma_event(INFO, "connecting to IP %pI4 port %d\n",
 		&addr_in->sin_addr, port);
 
 	init_waitqueue_head(&info->conn_wait);
+	init_waitqueue_head(&info->disconn_wait);
+	init_waitqueue_head(&info->wait_reassembly_queue);
 	rc = rdma_connect(info->id, &conn_param);
 	if (rc) {
 		log_rdma_event(ERR, "rdma_connect() failed with %i\n", rc);
@@ -1768,19 +1746,11 @@ static struct smbd_connection *_smbd_get_connection(
 	}
 
 	init_waitqueue_head(&info->wait_send_queue);
-	init_waitqueue_head(&info->wait_reassembly_queue);
-
 	INIT_DELAYED_WORK(&info->idle_timer_work, idle_connection_timer);
 	INIT_DELAYED_WORK(&info->send_immediate_work, send_immediate_work);
 	queue_delayed_work(info->workqueue, &info->idle_timer_work,
 		info->keep_alive_interval*HZ);
 
-	init_waitqueue_head(&info->wait_smbd_send_pending);
-	info->smbd_send_pending = 0;
-
-	init_waitqueue_head(&info->wait_smbd_recv_pending);
-	info->smbd_recv_pending = 0;
-
 	init_waitqueue_head(&info->wait_send_pending);
 	atomic_set(&info->send_pending, 0);
 
@@ -1788,7 +1758,6 @@ static struct smbd_connection *_smbd_get_connection(
 	atomic_set(&info->send_payload_pending, 0);
 
 	INIT_WORK(&info->disconnect_work, smbd_disconnect_rdma_work);
-	INIT_WORK(&info->destroy_work, smbd_destroy_rdma_work);
 	INIT_WORK(&info->recv_done_work, smbd_recv_done_work);
 	INIT_WORK(&info->post_send_credits_work, smbd_post_send_credits);
 	info->new_credits_offered = 0;
@@ -1810,7 +1779,7 @@ static struct smbd_connection *_smbd_get_connection(
 
 allocate_mr_failed:
 	/* At this point, need to a full transport shutdown */
-	smbd_destroy(info);
+	smbd_destroy(server);
 	return NULL;
 
 negotiation_failed:
@@ -1882,11 +1851,6 @@ static int smbd_recv_buf(struct smbd_connection *info, char *buf,
 	int rc;
 
 again:
-	if (info->transport_status != SMBD_CONNECTED) {
-		log_read(ERR, "disconnected\n");
-		return -ENODEV;
-	}
-
 	/*
 	 * No need to hold the reassembly queue lock all the time as we are
 	 * the only one reading from the front of the queue. The transport
@@ -2000,7 +1964,12 @@ read_rfc1002_done:
 			info->transport_status != SMBD_CONNECTED);
 	/* Don't return any data if interrupted */
 	if (rc)
-		return -ENODEV;
+		return rc;
+
+	if (info->transport_status != SMBD_CONNECTED) {
+		log_read(ERR, "disconnected\n");
+		return 0;
+	}
 
 	goto again;
 }
@@ -2052,8 +2021,6 @@ int smbd_recv(struct smbd_connection *info, struct msghdr *msg)
 	unsigned int to_read, page_offset;
 	int rc;
 
-	info->smbd_recv_pending++;
-
 	if (iov_iter_rw(&msg->msg_iter) == WRITE) {
 		/* It's a bug in upper layer to get there */
 		cifs_dbg(VFS, "CIFS: invalid msg iter dir %u\n",
@@ -2084,9 +2051,6 @@ int smbd_recv(struct smbd_connection *info, struct msghdr *msg)
 	}
 
 out:
-	info->smbd_recv_pending--;
-	wake_up(&info->wait_smbd_recv_pending);
-
 	/* SMBDirect will read it all or nothing */
 	if (rc > 0)
 		msg->msg_iter.count = 0;
@@ -2099,7 +2063,8 @@ out:
  * rqst: the data to write
  * return value: 0 if successfully write, otherwise error code
  */
-int smbd_send(struct TCP_Server_Info *server, struct smb_rqst *rqst)
+int smbd_send(struct TCP_Server_Info *server,
+	int num_rqst, struct smb_rqst *rqst_array)
 {
 	struct smbd_connection *info = server->smbd_conn;
 	struct kvec vec;
@@ -2111,54 +2076,51 @@ int smbd_send(struct TCP_Server_Info *server, struct smb_rqst *rqst)
 		info->max_send_size - sizeof(struct smbd_data_transfer);
 	struct kvec *iov;
 	int rc;
+	struct smb_rqst *rqst;
+	int rqst_idx;
 
-	info->smbd_send_pending++;
 	if (info->transport_status != SMBD_CONNECTED) {
-		rc = -ENODEV;
+		rc = -EAGAIN;
 		goto done;
 	}
 
 	/*
-	 * Skip the RFC1002 length defined in MS-SMB2 section 2.1
-	 * It is used only for TCP transport in the iov[0]
-	 * In future we may want to add a transport layer under protocol
-	 * layer so this will only be issued to TCP transport
-	 */
-
-	if (rqst->rq_iov[0].iov_len != 4) {
-		log_write(ERR, "expected the pdu length in 1st iov, but got %zu\n", rqst->rq_iov[0].iov_len);
-		return -EINVAL;
-	}
-
-	/*
 	 * Add in the page array if there is one. The caller needs to set
 	 * rq_tailsz to PAGE_SIZE when the buffer has multiple pages and
 	 * ends at page boundary
 	 */
-	buflen = smb_rqst_len(server, rqst);
+	remaining_data_length = 0;
+	for (i = 0; i < num_rqst; i++)
+		remaining_data_length += smb_rqst_len(server, &rqst_array[i]);
 
-	if (buflen + sizeof(struct smbd_data_transfer) >
+	if (remaining_data_length + sizeof(struct smbd_data_transfer) >
 		info->max_fragmented_send_size) {
 		log_write(ERR, "payload size %d > max size %d\n",
-			buflen, info->max_fragmented_send_size);
+			remaining_data_length, info->max_fragmented_send_size);
 		rc = -EINVAL;
 		goto done;
 	}
 
-	iov = &rqst->rq_iov[1];
+	log_write(INFO, "num_rqst=%d total length=%u\n",
+			num_rqst, remaining_data_length);
+
+	rqst_idx = 0;
+next_rqst:
+	rqst = &rqst_array[rqst_idx];
+	iov = rqst->rq_iov;
 
-	cifs_dbg(FYI, "Sending smb (RDMA): smb_len=%u\n", buflen);
-	for (i = 0; i < rqst->rq_nvec-1; i++)
+	cifs_dbg(FYI, "Sending smb (RDMA): idx=%d smb_len=%lu\n",
+		rqst_idx, smb_rqst_len(server, rqst));
+	for (i = 0; i < rqst->rq_nvec; i++)
 		dump_smb(iov[i].iov_base, iov[i].iov_len);
 
-	remaining_data_length = buflen;
 
-	log_write(INFO, "rqst->rq_nvec=%d rqst->rq_npages=%d rq_pagesz=%d "
-		"rq_tailsz=%d buflen=%d\n",
-		rqst->rq_nvec, rqst->rq_npages, rqst->rq_pagesz,
-		rqst->rq_tailsz, buflen);
+	log_write(INFO, "rqst_idx=%d nvec=%d rqst->rq_npages=%d rq_pagesz=%d "
+		"rq_tailsz=%d buflen=%lu\n",
+		rqst_idx, rqst->rq_nvec, rqst->rq_npages, rqst->rq_pagesz,
+		rqst->rq_tailsz, smb_rqst_len(server, rqst));
 
-	start = i = iov[0].iov_len ? 0 : 1;
+	start = i = 0;
 	buflen = 0;
 	while (true) {
 		buflen += iov[i].iov_len;
@@ -2206,14 +2168,14 @@ int smbd_send(struct TCP_Server_Info *server, struct smb_rqst *rqst)
 						goto done;
 				}
 				i++;
-				if (i == rqst->rq_nvec-1)
+				if (i == rqst->rq_nvec)
 					break;
 			}
 			start = i;
 			buflen = 0;
 		} else {
 			i++;
-			if (i == rqst->rq_nvec-1) {
+			if (i == rqst->rq_nvec) {
 				/* send out all remaining vecs */
 				remaining_data_length -= buflen;
 				log_write(INFO,
@@ -2257,6 +2219,10 @@ int smbd_send(struct TCP_Server_Info *server, struct smb_rqst *rqst)
 		}
 	}
 
+	rqst_idx++;
+	if (rqst_idx < num_rqst)
+		goto next_rqst;
+
 done:
 	/*
 	 * As an optimization, we don't wait for individual I/O to finish
@@ -2268,9 +2234,6 @@ done:
 	wait_event(info->wait_send_payload_pending,
 		atomic_read(&info->send_payload_pending) == 0);
 
-	info->smbd_send_pending--;
-	wake_up(&info->wait_smbd_send_pending);
-
 	return rc;
 }
 
diff --git a/fs/cifs/smbdirect.h b/fs/cifs/smbdirect.h
index a11096254f29..6ff880a1e186 100644
--- a/fs/cifs/smbdirect.h
+++ b/fs/cifs/smbdirect.h
@@ -1,17 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) 2017, Microsoft Corporation.
  *
  *   Author(s): Long Li <longli@microsoft.com>
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
  */
 #ifndef _SMBDIRECT_H
 #define _SMBDIRECT_H
@@ -70,12 +61,11 @@ struct smbd_connection {
 	int ri_rc;
 	struct completion ri_done;
 	wait_queue_head_t conn_wait;
-	wait_queue_head_t wait_destroy;
+	wait_queue_head_t disconn_wait;
 
 	struct completion negotiate_completion;
 	bool negotiate_done;
 
-	struct work_struct destroy_work;
 	struct work_struct disconnect_work;
 	struct work_struct recv_done_work;
 	struct work_struct post_send_credits_work;
@@ -123,13 +113,6 @@ struct smbd_connection {
 	wait_queue_head_t wait_for_mr_cleanup;
 
 	/* Activity accoutning */
-	/* Pending reqeusts issued from upper layer */
-	int smbd_send_pending;
-	wait_queue_head_t wait_smbd_send_pending;
-
-	int smbd_recv_pending;
-	wait_queue_head_t wait_smbd_recv_pending;
-
 	atomic_t send_pending;
 	wait_queue_head_t wait_send_pending;
 	atomic_t send_payload_pending;
@@ -288,11 +271,12 @@ struct smbd_connection *smbd_get_connection(
 /* Reconnect SMBDirect session */
 int smbd_reconnect(struct TCP_Server_Info *server);
 /* Destroy SMBDirect session */
-void smbd_destroy(struct smbd_connection *info);
+void smbd_destroy(struct TCP_Server_Info *server);
 
 /* Interface for carrying upper layer I/O through send/recv */
 int smbd_recv(struct smbd_connection *info, struct msghdr *msg);
-int smbd_send(struct TCP_Server_Info *server, struct smb_rqst *rqst);
+int smbd_send(struct TCP_Server_Info *server,
+	int num_rqst, struct smb_rqst *rqst);
 
 enum mr_state {
 	MR_READY,
@@ -330,9 +314,9 @@ struct smbd_connection {};
 static inline void *smbd_get_connection(
 	struct TCP_Server_Info *server, struct sockaddr *dstaddr) {return NULL;}
 static inline int smbd_reconnect(struct TCP_Server_Info *server) {return -1; }
-static inline void smbd_destroy(struct smbd_connection *info) {}
+static inline void smbd_destroy(struct TCP_Server_Info *server) {}
 static inline int smbd_recv(struct smbd_connection *info, struct msghdr *msg) {return -1; }
-static inline int smbd_send(struct TCP_Server_Info *server, struct smb_rqst *rqst) {return -1; }
+static inline int smbd_send(struct TCP_Server_Info *server, int num_rqst, struct smb_rqst *rqst) {return -1; }
 #endif
 
 #endif
diff --git a/fs/cifs/smbencrypt.c b/fs/cifs/smbencrypt.c
index a0b80ac651a6..2b6d87bfdf8e 100644
--- a/fs/cifs/smbencrypt.c
+++ b/fs/cifs/smbencrypt.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
    Unix SMB/Netbios implementation.
    Version 1.9.
@@ -8,19 +9,6 @@
    Copyright (C) Andrew Bartlett <abartlet@samba.org> 2002-2003
    Modified by Steve French (sfrench@us.ibm.com) 2002-2003
 
-   This program is free software; you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program; if not, write to the Free Software
-   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
 
 #include <linux/crypto.h>
diff --git a/fs/cifs/smbfsctl.h b/fs/cifs/smbfsctl.h
index f996daeea271..08628e6a42ac 100644
--- a/fs/cifs/smbfsctl.h
+++ b/fs/cifs/smbfsctl.h
@@ -35,6 +35,33 @@
  * below). Additional detail on less common ones can be found in MS-FSCC
  * section 2.3.
  */
+
+/*
+ * FSCTL values are 32 bits and are constructed as
+ * <device 16bits> <access 2bits> <function 12bits> <method 2bits>
+ */
+/* Device */
+#define FSCTL_DEVICE_DFS                 (0x0006 << 16)
+#define FSCTL_DEVICE_FILE_SYSTEM         (0x0009 << 16)
+#define FSCTL_DEVICE_NAMED_PIPE          (0x0011 << 16)
+#define FSCTL_DEVICE_NETWORK_FILE_SYSTEM (0x0014 << 16)
+#define FSCTL_DEVICE_MASK                0xffff0000
+/* Access */
+#define FSCTL_DEVICE_ACCESS_FILE_ANY_ACCESS        (0x00 << 14)
+#define FSCTL_DEVICE_ACCESS_FILE_READ_ACCESS       (0x01 << 14)
+#define FSCTL_DEVICE_ACCESS_FILE_WRITE_ACCESS      (0x02 << 14)
+#define FSCTL_DEVICE_ACCESS_FILE_READ_WRITE_ACCESS (0x03 << 14)
+#define FSCTL_DEVICE_ACCESS_MASK                   0x0000c000
+/* Function */
+#define FSCTL_DEVICE_FUNCTION_MASK       0x00003ffc
+/* Method */
+#define FSCTL_DEVICE_METHOD_BUFFERED   0x00
+#define FSCTL_DEVICE_METHOD_IN_DIRECT  0x01
+#define FSCTL_DEVICE_METHOD_OUT_DIRECT 0x02
+#define FSCTL_DEVICE_METHOD_NEITHER    0x03
+#define FSCTL_DEVICE_METHOD_MASK       0x00000003
+
+
 #define FSCTL_DFS_GET_REFERRALS      0x00060194
 #define FSCTL_DFS_GET_REFERRALS_EX   0x000601B0
 #define FSCTL_REQUEST_OPLOCK_LEVEL_1 0x00090000
@@ -76,7 +103,7 @@
 #define FSCTL_SET_ZERO_ON_DEALLOC    0x00090194 /* BB add struct */
 #define FSCTL_SET_SHORT_NAME_BEHAVIOR 0x000901B4 /* BB add struct */
 #define FSCTL_GET_INTEGRITY_INFORMATION 0x0009027C
-#define FSCTL_QUERY_ALLOCATED_RANGES 0x000940CF /* BB add struct */
+#define FSCTL_QUERY_ALLOCATED_RANGES 0x000940CF
 #define FSCTL_SET_DEFECT_MANAGEMENT  0x00098134 /* BB add struct */
 #define FSCTL_FILE_LEVEL_TRIM        0x00098208 /* BB add struct */
 #define FSCTL_DUPLICATE_EXTENTS_TO_FILE 0x00098344
diff --git a/fs/cifs/trace.h b/fs/cifs/trace.h
index 59be48206932..99c4d799c24b 100644
--- a/fs/cifs/trace.h
+++ b/fs/cifs/trace.h
@@ -58,6 +58,9 @@ DEFINE_EVENT(smb3_rw_err_class, smb3_##name,    \
 
 DEFINE_SMB3_RW_ERR_EVENT(write_err);
 DEFINE_SMB3_RW_ERR_EVENT(read_err);
+DEFINE_SMB3_RW_ERR_EVENT(query_dir_err);
+DEFINE_SMB3_RW_ERR_EVENT(zero_err);
+DEFINE_SMB3_RW_ERR_EVENT(falloc_err);
 
 
 /* For logging successful read or write */
@@ -100,8 +103,16 @@ DEFINE_EVENT(smb3_rw_done_class, smb3_##name,   \
 		__u32	len),			\
 	TP_ARGS(xid, fid, tid, sesid, offset, len))
 
+DEFINE_SMB3_RW_DONE_EVENT(write_enter);
+DEFINE_SMB3_RW_DONE_EVENT(read_enter);
+DEFINE_SMB3_RW_DONE_EVENT(query_dir_enter);
+DEFINE_SMB3_RW_DONE_EVENT(zero_enter);
+DEFINE_SMB3_RW_DONE_EVENT(falloc_enter);
 DEFINE_SMB3_RW_DONE_EVENT(write_done);
 DEFINE_SMB3_RW_DONE_EVENT(read_done);
+DEFINE_SMB3_RW_DONE_EVENT(query_dir_done);
+DEFINE_SMB3_RW_DONE_EVENT(zero_done);
+DEFINE_SMB3_RW_DONE_EVENT(falloc_done);
 
 /*
  * For handle based calls other than read and write, and get/set info
@@ -148,6 +159,48 @@ DEFINE_SMB3_FD_ERR_EVENT(close_err);
 /*
  * For handle based query/set info calls
  */
+DECLARE_EVENT_CLASS(smb3_inf_enter_class,
+	TP_PROTO(unsigned int xid,
+		__u64	fid,
+		__u32	tid,
+		__u64	sesid,
+		__u8	infclass,
+		__u32	type),
+	TP_ARGS(xid, fid, tid, sesid, infclass, type),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u64, fid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(__u8, infclass)
+		__field(__u32, type)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->fid = fid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->infclass = infclass;
+		__entry->type = type;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x fid=0x%llx class=%u type=0x%x",
+		__entry->xid, __entry->sesid, __entry->tid, __entry->fid,
+		__entry->infclass, __entry->type)
+)
+
+#define DEFINE_SMB3_INF_ENTER_EVENT(name)          \
+DEFINE_EVENT(smb3_inf_enter_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u64	fid,			\
+		__u32	tid,			\
+		__u64	sesid,			\
+		__u8	infclass,		\
+		__u32	type),			\
+	TP_ARGS(xid, fid, tid, sesid, infclass, type))
+
+DEFINE_SMB3_INF_ENTER_EVENT(query_info_enter);
+DEFINE_SMB3_INF_ENTER_EVENT(query_info_done);
+
 DECLARE_EVENT_CLASS(smb3_inf_err_class,
 	TP_PROTO(unsigned int xid,
 		__u64	fid,
@@ -195,6 +248,123 @@ DEFINE_SMB3_INF_ERR_EVENT(query_info_err);
 DEFINE_SMB3_INF_ERR_EVENT(set_info_err);
 DEFINE_SMB3_INF_ERR_EVENT(fsctl_err);
 
+DECLARE_EVENT_CLASS(smb3_inf_compound_enter_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid,
+		const char *full_path),
+	TP_ARGS(xid, tid, sesid, full_path),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__string(path, full_path)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__assign_str(path, full_path);
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x path=%s",
+		__entry->xid, __entry->sesid, __entry->tid,
+		__get_str(path))
+)
+
+#define DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(name)     \
+DEFINE_EVENT(smb3_inf_compound_enter_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		const char *full_path),		\
+	TP_ARGS(xid, tid, sesid, full_path))
+
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(query_info_compound_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(hardlink_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(rename_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(rmdir_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(set_eof_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(set_info_compound_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(delete_enter);
+DEFINE_SMB3_INF_COMPOUND_ENTER_EVENT(mkdir_enter);
+
+
+DECLARE_EVENT_CLASS(smb3_inf_compound_done_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid),
+	TP_ARGS(xid, tid, sesid),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x",
+		__entry->xid, __entry->sesid, __entry->tid)
+)
+
+#define DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(name)     \
+DEFINE_EVENT(smb3_inf_compound_done_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid),			\
+	TP_ARGS(xid, tid, sesid))
+
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(query_info_compound_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(hardlink_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(rename_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(rmdir_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(set_eof_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(set_info_compound_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(delete_done);
+DEFINE_SMB3_INF_COMPOUND_DONE_EVENT(mkdir_done);
+
+
+DECLARE_EVENT_CLASS(smb3_inf_compound_err_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid,
+		int	rc),
+	TP_ARGS(xid, tid, sesid, rc),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(int, rc)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->rc = rc;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x rc=%d",
+		__entry->xid, __entry->sesid, __entry->tid,
+		__entry->rc)
+)
+
+#define DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(name)     \
+DEFINE_EVENT(smb3_inf_compound_err_class, smb3_##name,    \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		int rc),			\
+	TP_ARGS(xid, tid, sesid, rc))
+
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(query_info_compound_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(hardlink_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(rename_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(rmdir_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(set_eof_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(set_info_compound_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(mkdir_err);
+DEFINE_SMB3_INF_COMPOUND_ERR_EVENT(delete_err);
+
 /*
  * For logging SMB3 Status code and Command for responses which return errors
  */
@@ -270,6 +440,7 @@ DEFINE_EVENT(smb3_cmd_done_class, smb3_##name,    \
 		__u64	mid),			\
 	TP_ARGS(tid, sesid, cmd, mid))
 
+DEFINE_SMB3_CMD_DONE_EVENT(cmd_enter);
 DEFINE_SMB3_CMD_DONE_EVENT(cmd_done);
 DEFINE_SMB3_CMD_DONE_EVENT(ses_expired);
 
@@ -378,19 +549,19 @@ DECLARE_EVENT_CLASS(smb3_tcon_class,
 		__field(unsigned int, xid)
 		__field(__u32, tid)
 		__field(__u64, sesid)
-		__field(const char *,  unc_name)
+		__string(name, unc_name)
 		__field(int, rc)
 	),
 	TP_fast_assign(
 		__entry->xid = xid;
 		__entry->tid = tid;
 		__entry->sesid = sesid;
-		__entry->unc_name = unc_name;
+		__assign_str(name, unc_name);
 		__entry->rc = rc;
 	),
 	TP_printk("xid=%u sid=0x%llx tid=0x%x unc_name=%s rc=%d",
 		__entry->xid, __entry->sesid, __entry->tid,
-		__entry->unc_name, __entry->rc)
+		__get_str(name), __entry->rc)
 )
 
 #define DEFINE_SMB3_TCON_EVENT(name)          \
@@ -406,8 +577,47 @@ DEFINE_SMB3_TCON_EVENT(tcon);
 
 
 /*
- * For smb2/smb3 open call
+ * For smb2/smb3 open (including create and mkdir) calls
  */
+
+DECLARE_EVENT_CLASS(smb3_open_enter_class,
+	TP_PROTO(unsigned int xid,
+		__u32	tid,
+		__u64	sesid,
+		int	create_options,
+		int	desired_access),
+	TP_ARGS(xid, tid, sesid, create_options, desired_access),
+	TP_STRUCT__entry(
+		__field(unsigned int, xid)
+		__field(__u32, tid)
+		__field(__u64, sesid)
+		__field(int, create_options)
+		__field(int, desired_access)
+	),
+	TP_fast_assign(
+		__entry->xid = xid;
+		__entry->tid = tid;
+		__entry->sesid = sesid;
+		__entry->create_options = create_options;
+		__entry->desired_access = desired_access;
+	),
+	TP_printk("xid=%u sid=0x%llx tid=0x%x cr_opts=0x%x des_access=0x%x",
+		__entry->xid, __entry->sesid, __entry->tid,
+		__entry->create_options, __entry->desired_access)
+)
+
+#define DEFINE_SMB3_OPEN_ENTER_EVENT(name)        \
+DEFINE_EVENT(smb3_open_enter_class, smb3_##name,  \
+	TP_PROTO(unsigned int xid,		\
+		__u32	tid,			\
+		__u64	sesid,			\
+		int	create_options,		\
+		int	desired_access),	\
+	TP_ARGS(xid, tid, sesid, create_options, desired_access))
+
+DEFINE_SMB3_OPEN_ENTER_EVENT(open_enter);
+DEFINE_SMB3_OPEN_ENTER_EVENT(posix_mkdir_enter);
+
 DECLARE_EVENT_CLASS(smb3_open_err_class,
 	TP_PROTO(unsigned int xid,
 		__u32	tid,
@@ -626,6 +836,7 @@ DEFINE_EVENT(smb3_credit_class, smb3_##name,  \
 	TP_ARGS(currmid, hostname, credits))
 
 DEFINE_SMB3_CREDIT_EVENT(reconnect_with_invalid_credits);
+DEFINE_SMB3_CREDIT_EVENT(credit_timeout);
 
 #endif /* _CIFS_TRACE_H */
 
diff --git a/fs/cifs/transport.c b/fs/cifs/transport.c
index 53532bd3f50d..60661b3f983a 100644
--- a/fs/cifs/transport.c
+++ b/fs/cifs/transport.c
@@ -33,6 +33,7 @@
 #include <linux/uaccess.h>
 #include <asm/processor.h>
 #include <linux/mempool.h>
+#include <linux/sched/signal.h>
 #include "cifspdu.h"
 #include "cifsglob.h"
 #include "cifsproto.h"
@@ -103,7 +104,10 @@ DeleteMidQEntry(struct mid_q_entry *midEntry)
 {
 #ifdef CONFIG_CIFS_STATS2
 	__le16 command = midEntry->server->vals->lock_cmd;
+	__u16 smb_cmd = le16_to_cpu(midEntry->command);
 	unsigned long now;
+	unsigned long roundtrip_time;
+	struct TCP_Server_Info *server = midEntry->server;
 #endif
 	midEntry->mid_state = MID_FREE;
 	atomic_dec(&midCount);
@@ -113,6 +117,23 @@ DeleteMidQEntry(struct mid_q_entry *midEntry)
 		cifs_small_buf_release(midEntry->resp_buf);
 #ifdef CONFIG_CIFS_STATS2
 	now = jiffies;
+	if (now < midEntry->when_alloc)
+		cifs_dbg(VFS, "invalid mid allocation time\n");
+	roundtrip_time = now - midEntry->when_alloc;
+
+	if (smb_cmd < NUMBER_OF_SMB2_COMMANDS) {
+		if (atomic_read(&server->num_cmds[smb_cmd]) == 0) {
+			server->slowest_cmd[smb_cmd] = roundtrip_time;
+			server->fastest_cmd[smb_cmd] = roundtrip_time;
+		} else {
+			if (server->slowest_cmd[smb_cmd] < roundtrip_time)
+				server->slowest_cmd[smb_cmd] = roundtrip_time;
+			else if (server->fastest_cmd[smb_cmd] > roundtrip_time)
+				server->fastest_cmd[smb_cmd] = roundtrip_time;
+		}
+		cifs_stats_inc(&server->num_cmds[smb_cmd]);
+		server->time_per_cmd[smb_cmd] += roundtrip_time;
+	}
 	/*
 	 * commands taking longer than one second (default) can be indications
 	 * that something is wrong, unless it is quite a slow link or a very
@@ -130,11 +151,10 @@ DeleteMidQEntry(struct mid_q_entry *midEntry)
 		 * smb2slowcmd[NUMBER_OF_SMB2_COMMANDS] counts by command
 		 * NB: le16_to_cpu returns unsigned so can not be negative below
 		 */
-		if (le16_to_cpu(midEntry->command) < NUMBER_OF_SMB2_COMMANDS)
-			cifs_stats_inc(&midEntry->server->smb2slowcmd[le16_to_cpu(midEntry->command)]);
+		if (smb_cmd < NUMBER_OF_SMB2_COMMANDS)
+			cifs_stats_inc(&server->smb2slowcmd[smb_cmd]);
 
-		trace_smb3_slow_rsp(le16_to_cpu(midEntry->command),
-			       midEntry->mid, midEntry->pid,
+		trace_smb3_slow_rsp(smb_cmd, midEntry->mid, midEntry->pid,
 			       midEntry->when_sent, midEntry->when_received);
 		if (cifsFYI & CIFS_TIMER) {
 			pr_debug(" CIFS slow rsp: cmd %d mid %llu",
@@ -291,6 +311,7 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
 	int n_vec;
 	unsigned int send_length = 0;
 	unsigned int i, j;
+	sigset_t mask, oldmask;
 	size_t total_len = 0, sent, size;
 	struct socket *ssocket = server->ssocket;
 	struct msghdr smb_msg;
@@ -298,11 +319,17 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
 	__be32 rfc1002_marker;
 
 	if (cifs_rdma_enabled(server) && server->smbd_conn) {
-		rc = smbd_send(server, rqst);
+		rc = smbd_send(server, num_rqst, rqst);
 		goto smbd_done;
 	}
+
 	if (ssocket == NULL)
-		return -ENOTSOCK;
+		return -EAGAIN;
+
+	if (signal_pending(current)) {
+		cifs_dbg(FYI, "signal is pending before sending any data\n");
+		return -EINTR;
+	}
 
 	/* cork the socket */
 	kernel_setsockopt(ssocket, SOL_TCP, TCP_CORK,
@@ -312,6 +339,16 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
 		send_length += smb_rqst_len(server, &rqst[j]);
 	rfc1002_marker = cpu_to_be32(send_length);
 
+	/*
+	 * We should not allow signals to interrupt the network send because
+	 * any partial send will cause session reconnects thus increasing
+	 * latency of system calls and overload a server with unnecessary
+	 * requests.
+	 */
+
+	sigfillset(&mask);
+	sigprocmask(SIG_BLOCK, &mask, &oldmask);
+
 	/* Generate a rfc1002 marker for SMB2+ */
 	if (server->vals->header_preamble_size == 0) {
 		struct kvec hiov = {
@@ -321,7 +358,7 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
 		iov_iter_kvec(&smb_msg.msg_iter, WRITE, &hiov, 1, 4);
 		rc = smb_send_kvec(server, &smb_msg, &sent);
 		if (rc < 0)
-			goto uncork;
+			goto unmask;
 
 		total_len += sent;
 		send_length += 4;
@@ -343,7 +380,7 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
 
 		rc = smb_send_kvec(server, &smb_msg, &sent);
 		if (rc < 0)
-			goto uncork;
+			goto unmask;
 
 		total_len += sent;
 
@@ -365,7 +402,25 @@ __smb_send_rqst(struct TCP_Server_Info *server, int num_rqst,
 		}
 	}
 
-uncork:
+unmask:
+	sigprocmask(SIG_SETMASK, &oldmask, NULL);
+
+	/*
+	 * If signal is pending but we have already sent the whole packet to
+	 * the server we need to return success status to allow a corresponding
+	 * mid entry to be kept in the pending requests queue thus allowing
+	 * to handle responses from the server by the client.
+	 *
+	 * If only part of the packet has been sent there is no need to hide
+	 * interrupt because the session will be reconnected anyway, so there
+	 * won't be any response from the server to handle.
+	 */
+
+	if (signal_pending(current) && (total_len != send_length)) {
+		cifs_dbg(FYI, "signal is pending after attempt to send\n");
+		rc = -EINTR;
+	}
+
 	/* uncork it */
 	val = 0;
 	kernel_setsockopt(ssocket, SOL_TCP, TCP_CORK,
@@ -450,29 +505,55 @@ smb_send(struct TCP_Server_Info *server, struct smb_hdr *smb_buffer,
 }
 
 static int
-wait_for_free_credits(struct TCP_Server_Info *server, const int timeout,
-		      int *credits)
+wait_for_free_credits(struct TCP_Server_Info *server, const int num_credits,
+		      const int timeout, const int flags,
+		      unsigned int *instance)
 {
 	int rc;
+	int *credits;
+	int optype;
+	long int t;
+
+	if (timeout < 0)
+		t = MAX_JIFFY_OFFSET;
+	else
+		t = msecs_to_jiffies(timeout);
+
+	optype = flags & CIFS_OP_MASK;
+
+	*instance = 0;
+
+	credits = server->ops->get_credits_field(server, optype);
+	/* Since an echo is already inflight, no need to wait to send another */
+	if (*credits <= 0 && optype == CIFS_ECHO_OP)
+		return -EAGAIN;
 
 	spin_lock(&server->req_lock);
-	if (timeout == CIFS_ASYNC_OP) {
+	if ((flags & CIFS_TIMEOUT_MASK) == CIFS_NON_BLOCKING) {
 		/* oplock breaks must not be held up */
 		server->in_flight++;
 		*credits -= 1;
+		*instance = server->reconnect_instance;
 		spin_unlock(&server->req_lock);
 		return 0;
 	}
 
 	while (1) {
-		if (*credits <= 0) {
+		if (*credits < num_credits) {
 			spin_unlock(&server->req_lock);
 			cifs_num_waiters_inc(server);
-			rc = wait_event_killable(server->request_q,
-						 has_credits(server, credits));
+			rc = wait_event_killable_timeout(server->request_q,
+				has_credits(server, credits, num_credits), t);
 			cifs_num_waiters_dec(server);
-			if (rc)
-				return rc;
+			if (!rc) {
+				trace_smb3_credit_timeout(server->CurrentMid,
+					server->hostname, num_credits);
+				cifs_dbg(VFS, "wait timed out after %d ms\n",
+					 timeout);
+				return -ENOTSUPP;
+			}
+			if (rc == -ERESTARTSYS)
+				return -ERESTARTSYS;
 			spin_lock(&server->req_lock);
 		} else {
 			if (server->tcpStatus == CifsExiting) {
@@ -481,14 +562,53 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int timeout,
 			}
 
 			/*
+			 * For normal commands, reserve the last MAX_COMPOUND
+			 * credits to compound requests.
+			 * Otherwise these compounds could be permanently
+			 * starved for credits by single-credit requests.
+			 *
+			 * To prevent spinning CPU, block this thread until
+			 * there are >MAX_COMPOUND credits available.
+			 * But only do this is we already have a lot of
+			 * credits in flight to avoid triggering this check
+			 * for servers that are slow to hand out credits on
+			 * new sessions.
+			 */
+			if (!optype && num_credits == 1 &&
+			    server->in_flight > 2 * MAX_COMPOUND &&
+			    *credits <= MAX_COMPOUND) {
+				spin_unlock(&server->req_lock);
+				cifs_num_waiters_inc(server);
+				rc = wait_event_killable_timeout(
+					server->request_q,
+					has_credits(server, credits,
+						    MAX_COMPOUND + 1),
+					t);
+				cifs_num_waiters_dec(server);
+				if (!rc) {
+					trace_smb3_credit_timeout(
+						server->CurrentMid,
+						server->hostname, num_credits);
+					cifs_dbg(VFS, "wait timed out after %d ms\n",
+						 timeout);
+					return -ENOTSUPP;
+				}
+				if (rc == -ERESTARTSYS)
+					return -ERESTARTSYS;
+				spin_lock(&server->req_lock);
+				continue;
+			}
+
+			/*
 			 * Can not count locking commands against total
 			 * as they are allowed to block on server.
 			 */
 
 			/* update # of requests on the wire to server */
-			if (timeout != CIFS_BLOCKING_OP) {
-				*credits -= 1;
-				server->in_flight++;
+			if ((flags & CIFS_TIMEOUT_MASK) != CIFS_BLOCKING_OP) {
+				*credits -= num_credits;
+				server->in_flight += num_credits;
+				*instance = server->reconnect_instance;
 			}
 			spin_unlock(&server->req_lock);
 			break;
@@ -498,24 +618,45 @@ wait_for_free_credits(struct TCP_Server_Info *server, const int timeout,
 }
 
 static int
-wait_for_free_request(struct TCP_Server_Info *server, const int timeout,
-		      const int optype)
+wait_for_free_request(struct TCP_Server_Info *server, const int flags,
+		      unsigned int *instance)
 {
-	int *val;
+	return wait_for_free_credits(server, 1, -1, flags,
+				     instance);
+}
 
-	val = server->ops->get_credits_field(server, optype);
-	/* Since an echo is already inflight, no need to wait to send another */
-	if (*val <= 0 && optype == CIFS_ECHO_OP)
-		return -EAGAIN;
-	return wait_for_free_credits(server, timeout, val);
+static int
+wait_for_compound_request(struct TCP_Server_Info *server, int num,
+			  const int flags, unsigned int *instance)
+{
+	int *credits;
+
+	credits = server->ops->get_credits_field(server, flags & CIFS_OP_MASK);
+
+	spin_lock(&server->req_lock);
+	if (*credits < num) {
+		/*
+		 * Return immediately if not too many requests in flight since
+		 * we will likely be stuck on waiting for credits.
+		 */
+		if (server->in_flight < num - *credits) {
+			spin_unlock(&server->req_lock);
+			return -ENOTSUPP;
+		}
+	}
+	spin_unlock(&server->req_lock);
+
+	return wait_for_free_credits(server, num, 60000, flags,
+				     instance);
 }
 
 int
 cifs_wait_mtu_credits(struct TCP_Server_Info *server, unsigned int size,
-		      unsigned int *num, unsigned int *credits)
+		      unsigned int *num, struct cifs_credits *credits)
 {
 	*num = size;
-	*credits = 0;
+	credits->value = 0;
+	credits->instance = server->reconnect_instance;
 	return 0;
 }
 
@@ -602,27 +743,43 @@ cifs_setup_async_request(struct TCP_Server_Info *server, struct smb_rqst *rqst)
 int
 cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst,
 		mid_receive_t *receive, mid_callback_t *callback,
-		mid_handle_t *handle, void *cbdata, const int flags)
+		mid_handle_t *handle, void *cbdata, const int flags,
+		const struct cifs_credits *exist_credits)
 {
-	int rc, timeout, optype;
+	int rc;
 	struct mid_q_entry *mid;
-	unsigned int credits = 0;
+	struct cifs_credits credits = { .value = 0, .instance = 0 };
+	unsigned int instance;
+	int optype;
 
-	timeout = flags & CIFS_TIMEOUT_MASK;
 	optype = flags & CIFS_OP_MASK;
 
 	if ((flags & CIFS_HAS_CREDITS) == 0) {
-		rc = wait_for_free_request(server, timeout, optype);
+		rc = wait_for_free_request(server, flags, &instance);
 		if (rc)
 			return rc;
-		credits = 1;
-	}
+		credits.value = 1;
+		credits.instance = instance;
+	} else
+		instance = exist_credits->instance;
 
 	mutex_lock(&server->srv_mutex);
+
+	/*
+	 * We can't use credits obtained from the previous session to send this
+	 * request. Check if there were reconnects after we obtained credits and
+	 * return -EAGAIN in such cases to let callers handle it.
+	 */
+	if (instance != server->reconnect_instance) {
+		mutex_unlock(&server->srv_mutex);
+		add_credits_and_wake_if(server, &credits, optype);
+		return -EAGAIN;
+	}
+
 	mid = server->ops->setup_async_request(server, rqst);
 	if (IS_ERR(mid)) {
 		mutex_unlock(&server->srv_mutex);
-		add_credits_and_wake_if(server, credits, optype);
+		add_credits_and_wake_if(server, &credits, optype);
 		return PTR_ERR(mid);
 	}
 
@@ -647,6 +804,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst,
 	cifs_in_send_dec(server);
 
 	if (rc < 0) {
+		revert_current_mid(server, mid->credits);
 		server->sequence_number -= 2;
 		cifs_delete_mid(mid);
 	}
@@ -656,7 +814,7 @@ cifs_call_async(struct TCP_Server_Info *server, struct smb_rqst *rqst,
 	if (rc == 0)
 		return 0;
 
-	add_credits_and_wake_if(server, credits, optype);
+	add_credits_and_wake_if(server, &credits, optype);
 	return rc;
 }
 
@@ -680,7 +838,7 @@ SendReceiveNoRsp(const unsigned int xid, struct cifs_ses *ses,
 
 	iov[0].iov_base = in_buf;
 	iov[0].iov_len = get_rfc1002_length(in_buf) + 4;
-	flags |= CIFS_NO_RESP;
+	flags |= CIFS_NO_RSP_BUF;
 	rc = SendReceive2(xid, ses, iov, 1, &resp_buf_type, flags, &rsp_iov);
 	cifs_dbg(NOISY, "SendRcvNoRsp flags %d rc %d\n", flags, rc);
 
@@ -786,8 +944,12 @@ static void
 cifs_compound_callback(struct mid_q_entry *mid)
 {
 	struct TCP_Server_Info *server = mid->server;
+	struct cifs_credits credits;
+
+	credits.value = server->ops->get_credits(mid);
+	credits.instance = server->reconnect_instance;
 
-	add_credits(server, server->ops->get_credits(mid), mid->optype);
+	add_credits(server, &credits, mid->optype);
 }
 
 static void
@@ -809,14 +971,15 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
 		   const int flags, const int num_rqst, struct smb_rqst *rqst,
 		   int *resp_buf_type, struct kvec *resp_iov)
 {
-	int i, j, rc = 0;
-	int timeout, optype;
+	int i, j, optype, rc = 0;
 	struct mid_q_entry *midQ[MAX_COMPOUND];
 	bool cancelled_mid[MAX_COMPOUND] = {false};
-	unsigned int credits[MAX_COMPOUND] = {0};
+	struct cifs_credits credits[MAX_COMPOUND] = {
+		{ .value = 0, .instance = 0 }
+	};
+	unsigned int instance;
 	char *buf;
 
-	timeout = flags & CIFS_TIMEOUT_MASK;
 	optype = flags & CIFS_OP_MASK;
 
 	for (i = 0; i < num_rqst; i++)
@@ -831,30 +994,21 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
 		return -ENOENT;
 
 	/*
-	 * Ensure we obtain 1 credit per request in the compound chain.
-	 * It can be optimized further by waiting for all the credits
-	 * at once but this can wait long enough if we don't have enough
-	 * credits due to some heavy operations in progress or the server
-	 * not granting us much, so a fallback to the current approach is
-	 * needed anyway.
+	 * Wait for all the requests to become available.
+	 * This approach still leaves the possibility to be stuck waiting for
+	 * credits if the server doesn't grant credits to the outstanding
+	 * requests and if the client is completely idle, not generating any
+	 * other requests.
+	 * This can be handled by the eventual session reconnect.
 	 */
+	rc = wait_for_compound_request(ses->server, num_rqst, flags,
+				       &instance);
+	if (rc)
+		return rc;
+
 	for (i = 0; i < num_rqst; i++) {
-		rc = wait_for_free_request(ses->server, timeout, optype);
-		if (rc) {
-			/*
-			 * We haven't sent an SMB packet to the server yet but
-			 * we already obtained credits for i requests in the
-			 * compound chain - need to return those credits back
-			 * for future use. Note that we need to call add_credits
-			 * multiple times to match the way we obtained credits
-			 * in the first place and to account for in flight
-			 * requests correctly.
-			 */
-			for (j = 0; j < i; j++)
-				add_credits(ses->server, 1, optype);
-			return rc;
-		}
-		credits[i] = 1;
+		credits[i].value = 1;
+		credits[i].instance = instance;
 	}
 
 	/*
@@ -865,16 +1019,31 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
 
 	mutex_lock(&ses->server->srv_mutex);
 
+	/*
+	 * All the parts of the compound chain belong obtained credits from the
+	 * same session. We can not use credits obtained from the previous
+	 * session to send this request. Check if there were reconnects after
+	 * we obtained credits and return -EAGAIN in such cases to let callers
+	 * handle it.
+	 */
+	if (instance != ses->server->reconnect_instance) {
+		mutex_unlock(&ses->server->srv_mutex);
+		for (j = 0; j < num_rqst; j++)
+			add_credits(ses->server, &credits[j], optype);
+		return -EAGAIN;
+	}
+
 	for (i = 0; i < num_rqst; i++) {
 		midQ[i] = ses->server->ops->setup_request(ses, &rqst[i]);
 		if (IS_ERR(midQ[i])) {
+			revert_current_mid(ses->server, i);
 			for (j = 0; j < i; j++)
 				cifs_delete_mid(midQ[j]);
 			mutex_unlock(&ses->server->srv_mutex);
 
 			/* Update # of requests on wire to server */
 			for (j = 0; j < num_rqst; j++)
-				add_credits(ses->server, credits[j], optype);
+				add_credits(ses->server, &credits[j], optype);
 			return PTR_ERR(midQ[i]);
 		}
 
@@ -897,15 +1066,20 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
 	for (i = 0; i < num_rqst; i++)
 		cifs_save_when_sent(midQ[i]);
 
-	if (rc < 0)
+	if (rc < 0) {
+		revert_current_mid(ses->server, num_rqst);
 		ses->server->sequence_number -= 2;
+	}
 
 	mutex_unlock(&ses->server->srv_mutex);
 
-	if (rc < 0) {
-		/* Sending failed for some reason - return credits back */
+	/*
+	 * If sending failed for some reason or it is an oplock break that we
+	 * will not receive a response to - return credits back
+	 */
+	if (rc < 0 || (flags & CIFS_NO_SRV_RSP)) {
 		for (i = 0; i < num_rqst; i++)
-			add_credits(ses->server, credits[i], optype);
+			add_credits(ses->server, &credits[i], optype);
 		goto out;
 	}
 
@@ -924,9 +1098,6 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
 		smb311_update_preauth_hash(ses, rqst[0].rq_iov,
 					   rqst[0].rq_nvec);
 
-	if (timeout == CIFS_ASYNC_OP)
-		goto out;
-
 	for (i = 0; i < num_rqst; i++) {
 		rc = wait_for_response(ses->server, midQ[i]);
 		if (rc != 0)
@@ -942,7 +1113,7 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
 				midQ[i]->mid_flags |= MID_WAIT_CANCELLED;
 				midQ[i]->callback = cifs_cancelled_callback;
 				cancelled_mid[i] = true;
-				credits[i] = 0;
+				credits[i].value = 0;
 			}
 			spin_unlock(&GlobalMid_Lock);
 		}
@@ -980,7 +1151,7 @@ compound_send_recv(const unsigned int xid, struct cifs_ses *ses,
 						     flags & CIFS_LOG_ERROR);
 
 		/* mark it so buf will not be freed by cifs_delete_mid */
-		if ((flags & CIFS_NO_RESP) == 0)
+		if ((flags & CIFS_NO_RSP_BUF) == 0)
 			midQ[i]->resp_buf = NULL;
 
 	}
@@ -1061,13 +1232,14 @@ SendReceive2(const unsigned int xid, struct cifs_ses *ses,
 int
 SendReceive(const unsigned int xid, struct cifs_ses *ses,
 	    struct smb_hdr *in_buf, struct smb_hdr *out_buf,
-	    int *pbytes_returned, const int timeout)
+	    int *pbytes_returned, const int flags)
 {
 	int rc = 0;
 	struct mid_q_entry *midQ;
 	unsigned int len = be32_to_cpu(in_buf->smb_buf_length);
 	struct kvec iov = { .iov_base = in_buf, .iov_len = len };
 	struct smb_rqst rqst = { .rq_iov = &iov, .rq_nvec = 1 };
+	struct cifs_credits credits = { .value = 1, .instance = 0 };
 
 	if (ses == NULL) {
 		cifs_dbg(VFS, "Null smb session\n");
@@ -1091,7 +1263,7 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses,
 		return -EIO;
 	}
 
-	rc = wait_for_free_request(ses->server, timeout, 0);
+	rc = wait_for_free_request(ses->server, flags, &credits.instance);
 	if (rc)
 		return rc;
 
@@ -1105,7 +1277,7 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses,
 	if (rc) {
 		mutex_unlock(&ses->server->srv_mutex);
 		/* Update # of requests on wire to server */
-		add_credits(ses->server, 1, 0);
+		add_credits(ses->server, &credits, 0);
 		return rc;
 	}
 
@@ -1130,9 +1302,6 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses,
 	if (rc < 0)
 		goto out;
 
-	if (timeout == CIFS_ASYNC_OP)
-		goto out;
-
 	rc = wait_for_response(ses->server, midQ);
 	if (rc != 0) {
 		send_cancel(ses->server, &rqst, midQ);
@@ -1141,7 +1310,7 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses,
 			/* no longer considered to be "in-flight" */
 			midQ->callback = DeleteMidQEntry;
 			spin_unlock(&GlobalMid_Lock);
-			add_credits(ses->server, 1, 0);
+			add_credits(ses->server, &credits, 0);
 			return rc;
 		}
 		spin_unlock(&GlobalMid_Lock);
@@ -1149,7 +1318,7 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses,
 
 	rc = cifs_sync_mid_result(midQ, ses->server);
 	if (rc != 0) {
-		add_credits(ses->server, 1, 0);
+		add_credits(ses->server, &credits, 0);
 		return rc;
 	}
 
@@ -1165,7 +1334,7 @@ SendReceive(const unsigned int xid, struct cifs_ses *ses,
 	rc = cifs_check_receive(midQ, ses->server, 0);
 out:
 	cifs_delete_mid(midQ);
-	add_credits(ses->server, 1, 0);
+	add_credits(ses->server, &credits, 0);
 
 	return rc;
 }
@@ -1207,6 +1376,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon,
 	unsigned int len = be32_to_cpu(in_buf->smb_buf_length);
 	struct kvec iov = { .iov_base = in_buf, .iov_len = len };
 	struct smb_rqst rqst = { .rq_iov = &iov, .rq_nvec = 1 };
+	unsigned int instance;
 
 	if (tcon == NULL || tcon->ses == NULL) {
 		cifs_dbg(VFS, "Null smb session\n");
@@ -1232,7 +1402,7 @@ SendReceiveBlockingLock(const unsigned int xid, struct cifs_tcon *tcon,
 		return -EIO;
 	}
 
-	rc = wait_for_free_request(ses->server, CIFS_BLOCKING_OP, 0);
+	rc = wait_for_free_request(ses->server, CIFS_BLOCKING_OP, &instance);
 	if (rc)
 		return rc;
 
diff --git a/fs/cifs/winucase.c b/fs/cifs/winucase.c
index 1506d4fddb2c..1a23a1d2ebf9 100644
--- a/fs/cifs/winucase.c
+++ b/fs/cifs/winucase.c
@@ -1,22 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * fs/cifs/winucase.c
  *
  * Copyright (c) Jeffrey Layton <jlayton@redhat.com>, 2013
  *
- * This program is free software;  you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY;  without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- * the GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program;  if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- *
  * The const tables in this file were converted from the following info
  * provided by Microsoft:
  *
diff --git a/fs/coda/Kconfig b/fs/coda/Kconfig
index c0e5a7fad06d..ae6759f9594a 100644
--- a/fs/coda/Kconfig
+++ b/fs/coda/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config CODA_FS
 	tristate "Coda file system support (advanced network fs)"
 	depends on INET
diff --git a/fs/coda/Makefile b/fs/coda/Makefile
index 1bab69a0d347..1ce66819da2a 100644
--- a/fs/coda/Makefile
+++ b/fs/coda/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux Coda filesystem routines.
 #
diff --git a/fs/coda/inode.c b/fs/coda/inode.c
index 97424cf206c0..23f6ebd08e80 100644
--- a/fs/coda/inode.c
+++ b/fs/coda/inode.c
@@ -54,17 +54,11 @@ static struct inode *coda_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void coda_i_callback(struct rcu_head *head)
+static void coda_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(coda_inode_cachep, ITOC(inode));
 }
 
-static void coda_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, coda_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct coda_inode_info *ei = (struct coda_inode_info *) foo;
@@ -104,7 +98,7 @@ static int coda_remount(struct super_block *sb, int *flags, char *data)
 static const struct super_operations coda_super_operations =
 {
 	.alloc_inode	= coda_alloc_inode,
-	.destroy_inode	= coda_destroy_inode,
+	.free_inode	= coda_free_inode,
 	.evict_inode	= coda_evict_inode,
 	.put_super	= coda_put_super,
 	.statfs		= coda_statfs,
diff --git a/fs/coda/psdev.c b/fs/coda/psdev.c
index c5234c21b539..0ceef32e6fae 100644
--- a/fs/coda/psdev.c
+++ b/fs/coda/psdev.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *      	An implementation of a loadable kernel mode driver providing
  *		multiple kernel/user space bidirectional communications links.
  *
  * 		Author: 	Alan Cox <alan@lxorguk.ukuu.org.uk>
- *
- *		This program is free software; you can redistribute it and/or
- *		modify it under the terms of the GNU General Public License
- *		as published by the Free Software Foundation; either version
- *		2 of the License, or (at your option) any later version.
  * 
  *              Adapted to become the Linux 2.0 Coda pseudo device
  *              Peter  Braam  <braam@maths.ox.ac.uk> 
@@ -39,7 +35,6 @@
 #include <linux/device.h>
 #include <linux/pid_namespace.h>
 #include <asm/io.h>
-#include <linux/poll.h>
 #include <linux/uaccess.h>
 
 #include <linux/coda.h>
diff --git a/fs/compat.c b/fs/compat.c
index 4a0aaaf53217..436d228cf71c 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/compat.c
  *
@@ -9,10 +10,6 @@
  *  Copyright (C) 1998       Eddie C. Dost  (ecd@skynet.be)
  *  Copyright (C) 2001,2002  Andi Kleen, SuSE Labs 
  *  Copyright (C) 2003       Pavel Machek (pavel@ucw.cz)
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 as
- *  published by the Free Software Foundation.
  */
 
 #include <linux/compat.h>
diff --git a/fs/compat_binfmt_elf.c b/fs/compat_binfmt_elf.c
index 15f6e96b3bd9..b7f9ffa1d5f1 100644
--- a/fs/compat_binfmt_elf.c
+++ b/fs/compat_binfmt_elf.c
@@ -1,12 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * 32-bit compatibility support for ELF format executables and core dumps.
  *
  * Copyright (C) 2007 Red Hat, Inc.  All rights reserved.
  *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
- *
  * Red Hat Author: Roland McGrath.
  *
  * This file is used in a 64-bit kernel that wants to support 32-bit ELF.
diff --git a/fs/configfs/Kconfig b/fs/configfs/Kconfig
index 9febcdefdfdc..272b64456999 100644
--- a/fs/configfs/Kconfig
+++ b/fs/configfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config CONFIGFS_FS
 	tristate "Userspace-driven configuration filesystem"
 	select SYSFS
diff --git a/fs/configfs/Makefile b/fs/configfs/Makefile
index 00ffb278e98c..0200498ede27 100644
--- a/fs/configfs/Makefile
+++ b/fs/configfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the configfs virtual filesystem
 #
diff --git a/fs/configfs/configfs_internal.h b/fs/configfs/configfs_internal.h
index ccc31fa6f1a7..f752d83a9c44 100644
--- a/fs/configfs/configfs_internal.h
+++ b/fs/configfs/configfs_internal.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset:8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * configfs_internal.h - Internal stuff for configfs
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  * Based on sysfs:
  * 	sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
  *
diff --git a/fs/configfs/dir.c b/fs/configfs/dir.c
index 39843fa7e11b..92112915de8e 100644
--- a/fs/configfs/dir.c
+++ b/fs/configfs/dir.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * dir.c - Operations for configfs directories.
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  * Based on sysfs:
  * 	sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
  *
@@ -27,6 +13,7 @@
 #undef DEBUG
 
 #include <linux/fs.h>
+#include <linux/fsnotify.h>
 #include <linux/mount.h>
 #include <linux/module.h>
 #include <linux/slab.h>
@@ -58,15 +45,13 @@ static void configfs_d_iput(struct dentry * dentry,
 	if (sd) {
 		/* Coordinate with configfs_readdir */
 		spin_lock(&configfs_dirent_lock);
-		/* Coordinate with configfs_attach_attr where will increase
-		 * sd->s_count and update sd->s_dentry to new allocated one.
-		 * Only set sd->dentry to null when this dentry is the only
-		 * sd owner.
-		 * If not do so, configfs_d_iput may run just after
-		 * configfs_attach_attr and set sd->s_dentry to null
-		 * even it's still in use.
+		/*
+		 * Set sd->s_dentry to null only when this dentry is the one
+		 * that is going to be killed.  Otherwise configfs_d_iput may
+		 * run just after configfs_attach_attr and set sd->s_dentry to
+		 * NULL even it's still in use.
 		 */
-		if (atomic_read(&sd->s_count) <= 2)
+		if (sd->s_dentry == dentry)
 			sd->s_dentry = NULL;
 
 		spin_unlock(&configfs_dirent_lock);
@@ -1690,9 +1675,11 @@ static loff_t configfs_dir_lseek(struct file *file, loff_t offset, int whence)
 	switch (whence) {
 		case 1:
 			offset += file->f_pos;
+			/* fall through */
 		case 0:
 			if (offset >= 0)
 				break;
+			/* fall through */
 		default:
 			return -EINVAL;
 	}
@@ -1755,12 +1742,19 @@ int configfs_register_group(struct config_group *parent_group,
 
 	inode_lock_nested(d_inode(parent), I_MUTEX_PARENT);
 	ret = create_default_group(parent_group, group);
-	if (!ret) {
-		spin_lock(&configfs_dirent_lock);
-		configfs_dir_set_ready(group->cg_item.ci_dentry->d_fsdata);
-		spin_unlock(&configfs_dirent_lock);
-	}
+	if (ret)
+		goto err_out;
+
+	spin_lock(&configfs_dirent_lock);
+	configfs_dir_set_ready(group->cg_item.ci_dentry->d_fsdata);
+	spin_unlock(&configfs_dirent_lock);
+	inode_unlock(d_inode(parent));
+	return 0;
+err_out:
 	inode_unlock(d_inode(parent));
+	mutex_lock(&subsys->su_mutex);
+	unlink_group(group);
+	mutex_unlock(&subsys->su_mutex);
 	return ret;
 }
 EXPORT_SYMBOL(configfs_register_group);
@@ -1795,6 +1789,7 @@ void configfs_unregister_group(struct config_group *group)
 	configfs_detach_group(&group->cg_item);
 	d_inode(dentry)->i_flags |= S_DEAD;
 	dont_mount(dentry);
+	fsnotify_rmdir(d_inode(parent), dentry);
 	d_delete(dentry);
 	inode_unlock(d_inode(parent));
 
@@ -1923,6 +1918,7 @@ void configfs_unregister_subsystem(struct configfs_subsystem *subsys)
 	configfs_detach_group(&group->cg_item);
 	d_inode(dentry)->i_flags |= S_DEAD;
 	dont_mount(dentry);
+	fsnotify_rmdir(d_inode(root), dentry);
 	inode_unlock(d_inode(dentry));
 
 	d_delete(dentry);
diff --git a/fs/configfs/file.c b/fs/configfs/file.c
index 62580dba3552..61e4db4390a1 100644
--- a/fs/configfs/file.c
+++ b/fs/configfs/file.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * file.c - operations for regular (text) files.
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  * Based on sysfs:
  * 	sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
  *
diff --git a/fs/configfs/inode.c b/fs/configfs/inode.c
index 28ef9e528853..ab0284321912 100644
--- a/fs/configfs/inode.c
+++ b/fs/configfs/inode.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * inode.c - basic inode and dentry operations.
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  * Based on sysfs:
  * 	sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
  *
diff --git a/fs/configfs/item.c b/fs/configfs/item.c
index 99d491cd01f9..6e0f1fcb8a5b 100644
--- a/fs/configfs/item.c
+++ b/fs/configfs/item.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * item.c - library routines for handling generic config items
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  * Based on kobject:
  *	kobject is Copyright (c) 2002-2003 Patrick Mochel
  *
diff --git a/fs/configfs/mount.c b/fs/configfs/mount.c
index cfd91320e869..791304fdde9d 100644
--- a/fs/configfs/mount.c
+++ b/fs/configfs/mount.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * mount.c - operations for initializing and mounting configfs.
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  * Based on sysfs:
  * 	sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
  *
diff --git a/fs/configfs/symlink.c b/fs/configfs/symlink.c
index a5c54af861f7..91eac6c55e07 100644
--- a/fs/configfs/symlink.c
+++ b/fs/configfs/symlink.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * symlink.c - operations for configfs symlinks.
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  * Based on sysfs:
  * 	sysfs is Copyright (C) 2001, 2002, 2003 Patrick Mochel
  *
diff --git a/fs/cramfs/Kconfig b/fs/cramfs/Kconfig
index 5933f995309a..c8bebb70a971 100644
--- a/fs/cramfs/Kconfig
+++ b/fs/cramfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config CRAMFS
 	tristate "Compressed ROM file system support (cramfs)"
 	select ZLIB_INFLATE
diff --git a/fs/cramfs/Makefile b/fs/cramfs/Makefile
index 92ebb464a725..8c3ed2982419 100644
--- a/fs/cramfs/Makefile
+++ b/fs/cramfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux cramfs routines.
 #
diff --git a/fs/crypto/Kconfig b/fs/crypto/Kconfig
index 02b7d91c9231..5fdf24877c17 100644
--- a/fs/crypto/Kconfig
+++ b/fs/crypto/Kconfig
@@ -1,16 +1,16 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config FS_ENCRYPTION
-	tristate "FS Encryption (Per-file encryption)"
+	bool "FS Encryption (Per-file encryption)"
 	select CRYPTO
 	select CRYPTO_AES
 	select CRYPTO_CBC
 	select CRYPTO_ECB
 	select CRYPTO_XTS
 	select CRYPTO_CTS
-	select CRYPTO_CTR
-	select CRYPTO_SHA256
 	select KEYS
 	help
 	  Enable encryption of files and directories.  This
 	  feature is similar to ecryptfs, but it is more memory
 	  efficient since it avoids caching the encrypted and
-	  decrypted pages in the page cache.
+	  decrypted pages in the page cache.  Currently Ext4,
+	  F2FS and UBIFS make use of this feature.
diff --git a/fs/crypto/Makefile b/fs/crypto/Makefile
index cb496989a6b6..4f0df5e682e4 100644
--- a/fs/crypto/Makefile
+++ b/fs/crypto/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_FS_ENCRYPTION)	+= fscrypto.o
 
 fscrypto-y := crypto.o fname.o hooks.o keyinfo.o policy.o
diff --git a/fs/crypto/bio.c b/fs/crypto/bio.c
index 0959044c5cee..82da2510721f 100644
--- a/fs/crypto/bio.c
+++ b/fs/crypto/bio.c
@@ -29,19 +29,16 @@
 static void __fscrypt_decrypt_bio(struct bio *bio, bool done)
 {
 	struct bio_vec *bv;
-	int i;
+	struct bvec_iter_all iter_all;
 
-	bio_for_each_segment_all(bv, bio, i) {
+	bio_for_each_segment_all(bv, bio, iter_all) {
 		struct page *page = bv->bv_page;
-		int ret = fscrypt_decrypt_page(page->mapping->host, page,
-				PAGE_SIZE, 0, page->index);
-
-		if (ret) {
-			WARN_ON_ONCE(1);
+		int ret = fscrypt_decrypt_pagecache_blocks(page, bv->bv_len,
+							   bv->bv_offset);
+		if (ret)
 			SetPageError(page);
-		} else if (done) {
+		else if (done)
 			SetPageUptodate(page);
-		}
 		if (done)
 			unlock_page(page);
 	}
@@ -55,9 +52,8 @@ EXPORT_SYMBOL(fscrypt_decrypt_bio);
 
 static void completion_pages(struct work_struct *work)
 {
-	struct fscrypt_ctx *ctx =
-		container_of(work, struct fscrypt_ctx, r.work);
-	struct bio *bio = ctx->r.bio;
+	struct fscrypt_ctx *ctx = container_of(work, struct fscrypt_ctx, work);
+	struct bio *bio = ctx->bio;
 
 	__fscrypt_decrypt_bio(bio, true);
 	fscrypt_release_ctx(ctx);
@@ -66,57 +62,29 @@ static void completion_pages(struct work_struct *work)
 
 void fscrypt_enqueue_decrypt_bio(struct fscrypt_ctx *ctx, struct bio *bio)
 {
-	INIT_WORK(&ctx->r.work, completion_pages);
-	ctx->r.bio = bio;
-	fscrypt_enqueue_decrypt_work(&ctx->r.work);
+	INIT_WORK(&ctx->work, completion_pages);
+	ctx->bio = bio;
+	fscrypt_enqueue_decrypt_work(&ctx->work);
 }
 EXPORT_SYMBOL(fscrypt_enqueue_decrypt_bio);
 
-void fscrypt_pullback_bio_page(struct page **page, bool restore)
-{
-	struct fscrypt_ctx *ctx;
-	struct page *bounce_page;
-
-	/* The bounce data pages are unmapped. */
-	if ((*page)->mapping)
-		return;
-
-	/* The bounce data page is unmapped. */
-	bounce_page = *page;
-	ctx = (struct fscrypt_ctx *)page_private(bounce_page);
-
-	/* restore control page */
-	*page = ctx->w.control_page;
-
-	if (restore)
-		fscrypt_restore_control_page(bounce_page);
-}
-EXPORT_SYMBOL(fscrypt_pullback_bio_page);
-
 int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
 				sector_t pblk, unsigned int len)
 {
-	struct fscrypt_ctx *ctx;
-	struct page *ciphertext_page = NULL;
+	const unsigned int blockbits = inode->i_blkbits;
+	const unsigned int blocksize = 1 << blockbits;
+	struct page *ciphertext_page;
 	struct bio *bio;
 	int ret, err = 0;
 
-	BUG_ON(inode->i_sb->s_blocksize != PAGE_SIZE);
-
-	ctx = fscrypt_get_ctx(inode, GFP_NOFS);
-	if (IS_ERR(ctx))
-		return PTR_ERR(ctx);
-
-	ciphertext_page = fscrypt_alloc_bounce_page(ctx, GFP_NOWAIT);
-	if (IS_ERR(ciphertext_page)) {
-		err = PTR_ERR(ciphertext_page);
-		goto errout;
-	}
+	ciphertext_page = fscrypt_alloc_bounce_page(GFP_NOWAIT);
+	if (!ciphertext_page)
+		return -ENOMEM;
 
 	while (len--) {
-		err = fscrypt_do_page_crypto(inode, FS_ENCRYPT, lblk,
-					     ZERO_PAGE(0), ciphertext_page,
-					     PAGE_SIZE, 0, GFP_NOFS);
+		err = fscrypt_crypt_block(inode, FS_ENCRYPT, lblk,
+					  ZERO_PAGE(0), ciphertext_page,
+					  blocksize, 0, GFP_NOFS);
 		if (err)
 			goto errout;
 
@@ -126,14 +94,11 @@ int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
 			goto errout;
 		}
 		bio_set_dev(bio, inode->i_sb->s_bdev);
-		bio->bi_iter.bi_sector =
-			pblk << (inode->i_sb->s_blocksize_bits - 9);
+		bio->bi_iter.bi_sector = pblk << (blockbits - 9);
 		bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
-		ret = bio_add_page(bio, ciphertext_page,
-					inode->i_sb->s_blocksize, 0);
-		if (ret != inode->i_sb->s_blocksize) {
+		ret = bio_add_page(bio, ciphertext_page, blocksize, 0);
+		if (WARN_ON(ret != blocksize)) {
 			/* should never happen! */
-			WARN_ON(1);
 			bio_put(bio);
 			err = -EIO;
 			goto errout;
@@ -149,7 +114,7 @@ int fscrypt_zeroout_range(const struct inode *inode, pgoff_t lblk,
 	}
 	err = 0;
 errout:
-	fscrypt_release_ctx(ctx);
+	fscrypt_free_bounce_page(ciphertext_page);
 	return err;
 }
 EXPORT_SYMBOL(fscrypt_zeroout_range);
diff --git a/fs/crypto/crypto.c b/fs/crypto/crypto.c
index 4dc788e3bc96..45c3d0427fb2 100644
--- a/fs/crypto/crypto.c
+++ b/fs/crypto/crypto.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This contains encryption functions for per-file encryption.
  *
@@ -58,23 +59,16 @@ void fscrypt_enqueue_decrypt_work(struct work_struct *work)
 EXPORT_SYMBOL(fscrypt_enqueue_decrypt_work);
 
 /**
- * fscrypt_release_ctx() - Releases an encryption context
- * @ctx: The encryption context to release.
+ * fscrypt_release_ctx() - Release a decryption context
+ * @ctx: The decryption context to release.
  *
- * If the encryption context was allocated from the pre-allocated pool, returns
- * it to that pool. Else, frees it.
- *
- * If there's a bounce page in the context, this frees that.
+ * If the decryption context was allocated from the pre-allocated pool, return
+ * it to that pool.  Else, free it.
  */
 void fscrypt_release_ctx(struct fscrypt_ctx *ctx)
 {
 	unsigned long flags;
 
-	if (ctx->flags & FS_CTX_HAS_BOUNCE_BUFFER_FL && ctx->w.bounce_page) {
-		mempool_free(ctx->w.bounce_page, fscrypt_bounce_page_pool);
-		ctx->w.bounce_page = NULL;
-	}
-	ctx->w.control_page = NULL;
 	if (ctx->flags & FS_CTX_REQUIRES_FREE_ENCRYPT_FL) {
 		kmem_cache_free(fscrypt_ctx_cachep, ctx);
 	} else {
@@ -86,33 +80,21 @@ void fscrypt_release_ctx(struct fscrypt_ctx *ctx)
 EXPORT_SYMBOL(fscrypt_release_ctx);
 
 /**
- * fscrypt_get_ctx() - Gets an encryption context
- * @inode:       The inode for which we are doing the crypto
+ * fscrypt_get_ctx() - Get a decryption context
  * @gfp_flags:   The gfp flag for memory allocation
  *
- * Allocates and initializes an encryption context.
+ * Allocate and initialize a decryption context.
  *
- * Return: An allocated and initialized encryption context on success; error
- * value or NULL otherwise.
+ * Return: A new decryption context on success; an ERR_PTR() otherwise.
  */
-struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *inode, gfp_t gfp_flags)
+struct fscrypt_ctx *fscrypt_get_ctx(gfp_t gfp_flags)
 {
-	struct fscrypt_ctx *ctx = NULL;
-	struct fscrypt_info *ci = inode->i_crypt_info;
+	struct fscrypt_ctx *ctx;
 	unsigned long flags;
 
-	if (ci == NULL)
-		return ERR_PTR(-ENOKEY);
-
 	/*
-	 * We first try getting the ctx from a free list because in
-	 * the common case the ctx will have an allocated and
-	 * initialized crypto tfm, so it's probably a worthwhile
-	 * optimization. For the bounce page, we first try getting it
-	 * from the kernel allocator because that's just about as fast
-	 * as getting it from a list and because a cache of free pages
-	 * should generally be a "last resort" option for a filesystem
-	 * to be able to do its job.
+	 * First try getting a ctx from the free list so that we don't have to
+	 * call into the slab allocator.
 	 */
 	spin_lock_irqsave(&fscrypt_ctx_lock, flags);
 	ctx = list_first_entry_or_null(&fscrypt_free_ctxs,
@@ -128,11 +110,31 @@ struct fscrypt_ctx *fscrypt_get_ctx(const struct inode *inode, gfp_t gfp_flags)
 	} else {
 		ctx->flags &= ~FS_CTX_REQUIRES_FREE_ENCRYPT_FL;
 	}
-	ctx->flags &= ~FS_CTX_HAS_BOUNCE_BUFFER_FL;
 	return ctx;
 }
 EXPORT_SYMBOL(fscrypt_get_ctx);
 
+struct page *fscrypt_alloc_bounce_page(gfp_t gfp_flags)
+{
+	return mempool_alloc(fscrypt_bounce_page_pool, gfp_flags);
+}
+
+/**
+ * fscrypt_free_bounce_page() - free a ciphertext bounce page
+ *
+ * Free a bounce page that was allocated by fscrypt_encrypt_pagecache_blocks(),
+ * or by fscrypt_alloc_bounce_page() directly.
+ */
+void fscrypt_free_bounce_page(struct page *bounce_page)
+{
+	if (!bounce_page)
+		return;
+	set_page_private(bounce_page, (unsigned long)NULL);
+	ClearPagePrivate(bounce_page);
+	mempool_free(bounce_page, fscrypt_bounce_page_pool);
+}
+EXPORT_SYMBOL(fscrypt_free_bounce_page);
+
 void fscrypt_generate_iv(union fscrypt_iv *iv, u64 lblk_num,
 			 const struct fscrypt_info *ci)
 {
@@ -146,10 +148,11 @@ void fscrypt_generate_iv(union fscrypt_iv *iv, u64 lblk_num,
 		crypto_cipher_encrypt_one(ci->ci_essiv_tfm, iv->raw, iv->raw);
 }
 
-int fscrypt_do_page_crypto(const struct inode *inode, fscrypt_direction_t rw,
-			   u64 lblk_num, struct page *src_page,
-			   struct page *dest_page, unsigned int len,
-			   unsigned int offs, gfp_t gfp_flags)
+/* Encrypt or decrypt a single filesystem block of file contents */
+int fscrypt_crypt_block(const struct inode *inode, fscrypt_direction_t rw,
+			u64 lblk_num, struct page *src_page,
+			struct page *dest_page, unsigned int len,
+			unsigned int offs, gfp_t gfp_flags)
 {
 	union fscrypt_iv iv;
 	struct skcipher_request *req = NULL;
@@ -159,7 +162,10 @@ int fscrypt_do_page_crypto(const struct inode *inode, fscrypt_direction_t rw,
 	struct crypto_skcipher *tfm = ci->ci_ctfm;
 	int res = 0;
 
-	BUG_ON(len == 0);
+	if (WARN_ON_ONCE(len <= 0))
+		return -EINVAL;
+	if (WARN_ON_ONCE(len % FS_CRYPTO_BLOCK_SIZE != 0))
+		return -EINVAL;
 
 	fscrypt_generate_iv(&iv, lblk_num, ci);
 
@@ -191,185 +197,207 @@ int fscrypt_do_page_crypto(const struct inode *inode, fscrypt_direction_t rw,
 	return 0;
 }
 
-struct page *fscrypt_alloc_bounce_page(struct fscrypt_ctx *ctx,
-				       gfp_t gfp_flags)
-{
-	ctx->w.bounce_page = mempool_alloc(fscrypt_bounce_page_pool, gfp_flags);
-	if (ctx->w.bounce_page == NULL)
-		return ERR_PTR(-ENOMEM);
-	ctx->flags |= FS_CTX_HAS_BOUNCE_BUFFER_FL;
-	return ctx->w.bounce_page;
-}
-
 /**
- * fscypt_encrypt_page() - Encrypts a page
- * @inode:     The inode for which the encryption should take place
- * @page:      The page to encrypt. Must be locked for bounce-page
- *             encryption.
- * @len:       Length of data to encrypt in @page and encrypted
- *             data in returned page.
- * @offs:      Offset of data within @page and returned
- *             page holding encrypted data.
- * @lblk_num:  Logical block number. This must be unique for multiple
- *             calls with same inode, except when overwriting
- *             previously written data.
- * @gfp_flags: The gfp flag for memory allocation
- *
- * Encrypts @page using the ctx encryption context. Performs encryption
- * either in-place or into a newly allocated bounce page.
- * Called on the page write path.
+ * fscrypt_encrypt_pagecache_blocks() - Encrypt filesystem blocks from a pagecache page
+ * @page:      The locked pagecache page containing the block(s) to encrypt
+ * @len:       Total size of the block(s) to encrypt.  Must be a nonzero
+ *		multiple of the filesystem's block size.
+ * @offs:      Byte offset within @page of the first block to encrypt.  Must be
+ *		a multiple of the filesystem's block size.
+ * @gfp_flags: Memory allocation flags
  *
- * Bounce page allocation is the default.
- * In this case, the contents of @page are encrypted and stored in an
- * allocated bounce page. @page has to be locked and the caller must call
- * fscrypt_restore_control_page() on the returned ciphertext page to
- * release the bounce buffer and the encryption context.
+ * A new bounce page is allocated, and the specified block(s) are encrypted into
+ * it.  In the bounce page, the ciphertext block(s) will be located at the same
+ * offsets at which the plaintext block(s) were located in the source page; any
+ * other parts of the bounce page will be left uninitialized.  However, normally
+ * blocksize == PAGE_SIZE and the whole page is encrypted at once.
  *
- * In-place encryption is used by setting the FS_CFLG_OWN_PAGES flag in
- * fscrypt_operations. Here, the input-page is returned with its content
- * encrypted.
+ * This is for use by the filesystem's ->writepages() method.
  *
- * Return: A page with the encrypted content on success. Else, an
- * error value or NULL.
+ * Return: the new encrypted bounce page on success; an ERR_PTR() on failure
  */
-struct page *fscrypt_encrypt_page(const struct inode *inode,
-				struct page *page,
-				unsigned int len,
-				unsigned int offs,
-				u64 lblk_num, gfp_t gfp_flags)
+struct page *fscrypt_encrypt_pagecache_blocks(struct page *page,
+					      unsigned int len,
+					      unsigned int offs,
+					      gfp_t gfp_flags)
 
 {
-	struct fscrypt_ctx *ctx;
-	struct page *ciphertext_page = page;
+	const struct inode *inode = page->mapping->host;
+	const unsigned int blockbits = inode->i_blkbits;
+	const unsigned int blocksize = 1 << blockbits;
+	struct page *ciphertext_page;
+	u64 lblk_num = ((u64)page->index << (PAGE_SHIFT - blockbits)) +
+		       (offs >> blockbits);
+	unsigned int i;
 	int err;
 
-	BUG_ON(len % FS_CRYPTO_BLOCK_SIZE != 0);
-
-	if (inode->i_sb->s_cop->flags & FS_CFLG_OWN_PAGES) {
-		/* with inplace-encryption we just encrypt the page */
-		err = fscrypt_do_page_crypto(inode, FS_ENCRYPT, lblk_num, page,
-					     ciphertext_page, len, offs,
-					     gfp_flags);
-		if (err)
-			return ERR_PTR(err);
-
-		return ciphertext_page;
-	}
-
-	BUG_ON(!PageLocked(page));
+	if (WARN_ON_ONCE(!PageLocked(page)))
+		return ERR_PTR(-EINVAL);
 
-	ctx = fscrypt_get_ctx(inode, gfp_flags);
-	if (IS_ERR(ctx))
-		return (struct page *)ctx;
+	if (WARN_ON_ONCE(len <= 0 || !IS_ALIGNED(len | offs, blocksize)))
+		return ERR_PTR(-EINVAL);
 
-	/* The encryption operation will require a bounce page. */
-	ciphertext_page = fscrypt_alloc_bounce_page(ctx, gfp_flags);
-	if (IS_ERR(ciphertext_page))
-		goto errout;
+	ciphertext_page = fscrypt_alloc_bounce_page(gfp_flags);
+	if (!ciphertext_page)
+		return ERR_PTR(-ENOMEM);
 
-	ctx->w.control_page = page;
-	err = fscrypt_do_page_crypto(inode, FS_ENCRYPT, lblk_num,
-				     page, ciphertext_page, len, offs,
-				     gfp_flags);
-	if (err) {
-		ciphertext_page = ERR_PTR(err);
-		goto errout;
+	for (i = offs; i < offs + len; i += blocksize, lblk_num++) {
+		err = fscrypt_crypt_block(inode, FS_ENCRYPT, lblk_num,
+					  page, ciphertext_page,
+					  blocksize, i, gfp_flags);
+		if (err) {
+			fscrypt_free_bounce_page(ciphertext_page);
+			return ERR_PTR(err);
+		}
 	}
 	SetPagePrivate(ciphertext_page);
-	set_page_private(ciphertext_page, (unsigned long)ctx);
-	lock_page(ciphertext_page);
+	set_page_private(ciphertext_page, (unsigned long)page);
 	return ciphertext_page;
+}
+EXPORT_SYMBOL(fscrypt_encrypt_pagecache_blocks);
 
-errout:
-	fscrypt_release_ctx(ctx);
-	return ciphertext_page;
+/**
+ * fscrypt_encrypt_block_inplace() - Encrypt a filesystem block in-place
+ * @inode:     The inode to which this block belongs
+ * @page:      The page containing the block to encrypt
+ * @len:       Size of block to encrypt.  Doesn't need to be a multiple of the
+ *		fs block size, but must be a multiple of FS_CRYPTO_BLOCK_SIZE.
+ * @offs:      Byte offset within @page at which the block to encrypt begins
+ * @lblk_num:  Filesystem logical block number of the block, i.e. the 0-based
+ *		number of the block within the file
+ * @gfp_flags: Memory allocation flags
+ *
+ * Encrypt a possibly-compressed filesystem block that is located in an
+ * arbitrary page, not necessarily in the original pagecache page.  The @inode
+ * and @lblk_num must be specified, as they can't be determined from @page.
+ *
+ * Return: 0 on success; -errno on failure
+ */
+int fscrypt_encrypt_block_inplace(const struct inode *inode, struct page *page,
+				  unsigned int len, unsigned int offs,
+				  u64 lblk_num, gfp_t gfp_flags)
+{
+	return fscrypt_crypt_block(inode, FS_ENCRYPT, lblk_num, page, page,
+				   len, offs, gfp_flags);
 }
-EXPORT_SYMBOL(fscrypt_encrypt_page);
+EXPORT_SYMBOL(fscrypt_encrypt_block_inplace);
 
 /**
- * fscrypt_decrypt_page() - Decrypts a page in-place
- * @inode:     The corresponding inode for the page to decrypt.
- * @page:      The page to decrypt. Must be locked in case
- *             it is a writeback page (FS_CFLG_OWN_PAGES unset).
- * @len:       Number of bytes in @page to be decrypted.
- * @offs:      Start of data in @page.
- * @lblk_num:  Logical block number.
+ * fscrypt_decrypt_pagecache_blocks() - Decrypt filesystem blocks in a pagecache page
+ * @page:      The locked pagecache page containing the block(s) to decrypt
+ * @len:       Total size of the block(s) to decrypt.  Must be a nonzero
+ *		multiple of the filesystem's block size.
+ * @offs:      Byte offset within @page of the first block to decrypt.  Must be
+ *		a multiple of the filesystem's block size.
  *
- * Decrypts page in-place using the ctx encryption context.
+ * The specified block(s) are decrypted in-place within the pagecache page,
+ * which must still be locked and not uptodate.  Normally, blocksize ==
+ * PAGE_SIZE and the whole page is decrypted at once.
  *
- * Called from the read completion callback.
+ * This is for use by the filesystem's ->readpages() method.
  *
- * Return: Zero on success, non-zero otherwise.
+ * Return: 0 on success; -errno on failure
  */
-int fscrypt_decrypt_page(const struct inode *inode, struct page *page,
-			unsigned int len, unsigned int offs, u64 lblk_num)
+int fscrypt_decrypt_pagecache_blocks(struct page *page, unsigned int len,
+				     unsigned int offs)
 {
-	if (!(inode->i_sb->s_cop->flags & FS_CFLG_OWN_PAGES))
-		BUG_ON(!PageLocked(page));
+	const struct inode *inode = page->mapping->host;
+	const unsigned int blockbits = inode->i_blkbits;
+	const unsigned int blocksize = 1 << blockbits;
+	u64 lblk_num = ((u64)page->index << (PAGE_SHIFT - blockbits)) +
+		       (offs >> blockbits);
+	unsigned int i;
+	int err;
+
+	if (WARN_ON_ONCE(!PageLocked(page)))
+		return -EINVAL;
+
+	if (WARN_ON_ONCE(len <= 0 || !IS_ALIGNED(len | offs, blocksize)))
+		return -EINVAL;
+
+	for (i = offs; i < offs + len; i += blocksize, lblk_num++) {
+		err = fscrypt_crypt_block(inode, FS_DECRYPT, lblk_num, page,
+					  page, blocksize, i, GFP_NOFS);
+		if (err)
+			return err;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(fscrypt_decrypt_pagecache_blocks);
 
-	return fscrypt_do_page_crypto(inode, FS_DECRYPT, lblk_num, page, page,
-				      len, offs, GFP_NOFS);
+/**
+ * fscrypt_decrypt_block_inplace() - Decrypt a filesystem block in-place
+ * @inode:     The inode to which this block belongs
+ * @page:      The page containing the block to decrypt
+ * @len:       Size of block to decrypt.  Doesn't need to be a multiple of the
+ *		fs block size, but must be a multiple of FS_CRYPTO_BLOCK_SIZE.
+ * @offs:      Byte offset within @page at which the block to decrypt begins
+ * @lblk_num:  Filesystem logical block number of the block, i.e. the 0-based
+ *		number of the block within the file
+ *
+ * Decrypt a possibly-compressed filesystem block that is located in an
+ * arbitrary page, not necessarily in the original pagecache page.  The @inode
+ * and @lblk_num must be specified, as they can't be determined from @page.
+ *
+ * Return: 0 on success; -errno on failure
+ */
+int fscrypt_decrypt_block_inplace(const struct inode *inode, struct page *page,
+				  unsigned int len, unsigned int offs,
+				  u64 lblk_num)
+{
+	return fscrypt_crypt_block(inode, FS_DECRYPT, lblk_num, page, page,
+				   len, offs, GFP_NOFS);
 }
-EXPORT_SYMBOL(fscrypt_decrypt_page);
+EXPORT_SYMBOL(fscrypt_decrypt_block_inplace);
 
 /*
- * Validate dentries for encrypted directories to make sure we aren't
- * potentially caching stale data after a key has been added or
- * removed.
+ * Validate dentries in encrypted directories to make sure we aren't potentially
+ * caching stale dentries after a key has been added.
  */
 static int fscrypt_d_revalidate(struct dentry *dentry, unsigned int flags)
 {
 	struct dentry *dir;
-	int dir_has_key, cached_with_key;
+	int err;
+	int valid;
+
+	/*
+	 * Plaintext names are always valid, since fscrypt doesn't support
+	 * reverting to ciphertext names without evicting the directory's inode
+	 * -- which implies eviction of the dentries in the directory.
+	 */
+	if (!(dentry->d_flags & DCACHE_ENCRYPTED_NAME))
+		return 1;
+
+	/*
+	 * Ciphertext name; valid if the directory's key is still unavailable.
+	 *
+	 * Although fscrypt forbids rename() on ciphertext names, we still must
+	 * use dget_parent() here rather than use ->d_parent directly.  That's
+	 * because a corrupted fs image may contain directory hard links, which
+	 * the VFS handles by moving the directory's dentry tree in the dcache
+	 * each time ->lookup() finds the directory and it already has a dentry
+	 * elsewhere.  Thus ->d_parent can be changing, and we must safely grab
+	 * a reference to some ->d_parent to prevent it from being freed.
+	 */
 
 	if (flags & LOOKUP_RCU)
 		return -ECHILD;
 
 	dir = dget_parent(dentry);
-	if (!IS_ENCRYPTED(d_inode(dir))) {
-		dput(dir);
-		return 0;
-	}
-
-	spin_lock(&dentry->d_lock);
-	cached_with_key = dentry->d_flags & DCACHE_ENCRYPTED_WITH_KEY;
-	spin_unlock(&dentry->d_lock);
-	dir_has_key = (d_inode(dir)->i_crypt_info != NULL);
+	err = fscrypt_get_encryption_info(d_inode(dir));
+	valid = !fscrypt_has_encryption_key(d_inode(dir));
 	dput(dir);
 
-	/*
-	 * If the dentry was cached without the key, and it is a
-	 * negative dentry, it might be a valid name.  We can't check
-	 * if the key has since been made available due to locking
-	 * reasons, so we fail the validation so ext4_lookup() can do
-	 * this check.
-	 *
-	 * We also fail the validation if the dentry was created with
-	 * the key present, but we no longer have the key, or vice versa.
-	 */
-	if ((!cached_with_key && d_is_negative(dentry)) ||
-			(!cached_with_key && dir_has_key) ||
-			(cached_with_key && !dir_has_key))
-		return 0;
-	return 1;
+	if (err < 0)
+		return err;
+
+	return valid;
 }
 
 const struct dentry_operations fscrypt_d_ops = {
 	.d_revalidate = fscrypt_d_revalidate,
 };
 
-void fscrypt_restore_control_page(struct page *page)
-{
-	struct fscrypt_ctx *ctx;
-
-	ctx = (struct fscrypt_ctx *)page_private(page);
-	set_page_private(page, (unsigned long)NULL);
-	ClearPagePrivate(page);
-	unlock_page(page);
-	fscrypt_release_ctx(ctx);
-}
-EXPORT_SYMBOL(fscrypt_restore_control_page);
-
 static void fscrypt_destroy(void)
 {
 	struct fscrypt_ctx *pos, *n;
diff --git a/fs/crypto/fname.c b/fs/crypto/fname.c
index 7ff40a73dbec..00d150ff3033 100644
--- a/fs/crypto/fname.c
+++ b/fs/crypto/fname.c
@@ -12,7 +12,6 @@
  */
 
 #include <linux/scatterlist.h>
-#include <linux/ratelimit.h>
 #include <crypto/skcipher.h>
 #include "fscrypt_private.h"
 
@@ -269,7 +268,7 @@ int fscrypt_fname_disk_to_usr(struct inode *inode,
 	if (iname->len < FS_CRYPTO_BLOCK_SIZE)
 		return -EUCLEAN;
 
-	if (inode->i_crypt_info)
+	if (fscrypt_has_encryption_key(inode))
 		return fname_decrypt(inode, iname, oname);
 
 	if (iname->len <= FSCRYPT_FNAME_MAX_UNDIGESTED_SIZE) {
@@ -336,7 +335,7 @@ int fscrypt_setup_filename(struct inode *dir, const struct qstr *iname,
 	if (ret)
 		return ret;
 
-	if (dir->i_crypt_info) {
+	if (fscrypt_has_encryption_key(dir)) {
 		if (!fscrypt_fname_encrypted_size(dir, iname->len,
 						  dir->i_sb->s_cop->max_namelen,
 						  &fname->crypto_buf.len))
@@ -356,6 +355,7 @@ int fscrypt_setup_filename(struct inode *dir, const struct qstr *iname,
 	}
 	if (!lookup)
 		return -ENOKEY;
+	fname->is_ciphertext_name = true;
 
 	/*
 	 * We don't have the key and we are doing a lookup; decode the
diff --git a/fs/crypto/fscrypt_private.h b/fs/crypto/fscrypt_private.h
index 7424f851eb5c..8978eec9d766 100644
--- a/fs/crypto/fscrypt_private.h
+++ b/fs/crypto/fscrypt_private.h
@@ -12,7 +12,6 @@
 #ifndef _FSCRYPT_PRIVATE_H
 #define _FSCRYPT_PRIVATE_H
 
-#define __FS_HAS_ENCRYPTION 1
 #include <linux/fscrypt.h>
 #include <crypto/hash.h>
 
@@ -95,7 +94,6 @@ typedef enum {
 } fscrypt_direction_t;
 
 #define FS_CTX_REQUIRES_FREE_ENCRYPT_FL		0x00000001
-#define FS_CTX_HAS_BOUNCE_BUFFER_FL		0x00000002
 
 static inline bool fscrypt_valid_enc_modes(u32 contents_mode,
 					   u32 filenames_mode)
@@ -118,14 +116,12 @@ static inline bool fscrypt_valid_enc_modes(u32 contents_mode,
 /* crypto.c */
 extern struct kmem_cache *fscrypt_info_cachep;
 extern int fscrypt_initialize(unsigned int cop_flags);
-extern int fscrypt_do_page_crypto(const struct inode *inode,
-				  fscrypt_direction_t rw, u64 lblk_num,
-				  struct page *src_page,
-				  struct page *dest_page,
-				  unsigned int len, unsigned int offs,
-				  gfp_t gfp_flags);
-extern struct page *fscrypt_alloc_bounce_page(struct fscrypt_ctx *ctx,
-					      gfp_t gfp_flags);
+extern int fscrypt_crypt_block(const struct inode *inode,
+			       fscrypt_direction_t rw, u64 lblk_num,
+			       struct page *src_page, struct page *dest_page,
+			       unsigned int len, unsigned int offs,
+			       gfp_t gfp_flags);
+extern struct page *fscrypt_alloc_bounce_page(gfp_t gfp_flags);
 extern const struct dentry_operations fscrypt_d_ops;
 
 extern void __printf(3, 4) __cold
diff --git a/fs/crypto/hooks.c b/fs/crypto/hooks.c
index 926e5df20ec3..c1d6715d88e9 100644
--- a/fs/crypto/hooks.c
+++ b/fs/crypto/hooks.c
@@ -1,10 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/crypto/hooks.c
  *
  * Encryption hooks for higher-level filesystem operations.
  */
 
-#include <linux/ratelimit.h>
 #include "fscrypt_private.h"
 
 /**
@@ -49,7 +49,8 @@ int fscrypt_file_open(struct inode *inode, struct file *filp)
 }
 EXPORT_SYMBOL_GPL(fscrypt_file_open);
 
-int __fscrypt_prepare_link(struct inode *inode, struct inode *dir)
+int __fscrypt_prepare_link(struct inode *inode, struct inode *dir,
+			   struct dentry *dentry)
 {
 	int err;
 
@@ -57,8 +58,12 @@ int __fscrypt_prepare_link(struct inode *inode, struct inode *dir)
 	if (err)
 		return err;
 
+	/* ... in case we looked up ciphertext name before key was added */
+	if (dentry->d_flags & DCACHE_ENCRYPTED_NAME)
+		return -ENOKEY;
+
 	if (!fscrypt_has_permitted_context(dir, inode))
-		return -EPERM;
+		return -EXDEV;
 
 	return 0;
 }
@@ -78,37 +83,42 @@ int __fscrypt_prepare_rename(struct inode *old_dir, struct dentry *old_dentry,
 	if (err)
 		return err;
 
+	/* ... in case we looked up ciphertext name(s) before key was added */
+	if ((old_dentry->d_flags | new_dentry->d_flags) &
+	    DCACHE_ENCRYPTED_NAME)
+		return -ENOKEY;
+
 	if (old_dir != new_dir) {
 		if (IS_ENCRYPTED(new_dir) &&
 		    !fscrypt_has_permitted_context(new_dir,
 						   d_inode(old_dentry)))
-			return -EPERM;
+			return -EXDEV;
 
 		if ((flags & RENAME_EXCHANGE) &&
 		    IS_ENCRYPTED(old_dir) &&
 		    !fscrypt_has_permitted_context(old_dir,
 						   d_inode(new_dentry)))
-			return -EPERM;
+			return -EXDEV;
 	}
 	return 0;
 }
 EXPORT_SYMBOL_GPL(__fscrypt_prepare_rename);
 
-int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry)
+int __fscrypt_prepare_lookup(struct inode *dir, struct dentry *dentry,
+			     struct fscrypt_name *fname)
 {
-	int err = fscrypt_get_encryption_info(dir);
+	int err = fscrypt_setup_filename(dir, &dentry->d_name, 1, fname);
 
-	if (err)
+	if (err && err != -ENOENT)
 		return err;
 
-	if (fscrypt_has_encryption_key(dir)) {
+	if (fname->is_ciphertext_name) {
 		spin_lock(&dentry->d_lock);
-		dentry->d_flags |= DCACHE_ENCRYPTED_WITH_KEY;
+		dentry->d_flags |= DCACHE_ENCRYPTED_NAME;
 		spin_unlock(&dentry->d_lock);
+		d_set_d_op(dentry, &fscrypt_d_ops);
 	}
-
-	d_set_d_op(dentry, &fscrypt_d_ops);
-	return 0;
+	return err;
 }
 EXPORT_SYMBOL_GPL(__fscrypt_prepare_lookup);
 
@@ -179,11 +189,9 @@ int __fscrypt_encrypt_symlink(struct inode *inode, const char *target,
 	sd->len = cpu_to_le16(ciphertext_len);
 
 	err = fname_encrypt(inode, &iname, sd->encrypted_path, ciphertext_len);
-	if (err) {
-		if (!disk_link->name)
-			kfree(sd);
-		return err;
-	}
+	if (err)
+		goto err_free_sd;
+
 	/*
 	 * Null-terminating the ciphertext doesn't make sense, but we still
 	 * count the null terminator in the length, so we might as well
@@ -191,9 +199,20 @@ int __fscrypt_encrypt_symlink(struct inode *inode, const char *target,
 	 */
 	sd->encrypted_path[ciphertext_len] = '\0';
 
+	/* Cache the plaintext symlink target for later use by get_link() */
+	err = -ENOMEM;
+	inode->i_link = kmemdup(target, len + 1, GFP_NOFS);
+	if (!inode->i_link)
+		goto err_free_sd;
+
 	if (!disk_link->name)
 		disk_link->name = (unsigned char *)sd;
 	return 0;
+
+err_free_sd:
+	if (!disk_link->name)
+		kfree(sd);
+	return err;
 }
 EXPORT_SYMBOL_GPL(__fscrypt_encrypt_symlink);
 
@@ -202,7 +221,7 @@ EXPORT_SYMBOL_GPL(__fscrypt_encrypt_symlink);
  * @inode: the symlink inode
  * @caddr: the on-disk contents of the symlink
  * @max_size: size of @caddr buffer
- * @done: if successful, will be set up to free the returned target
+ * @done: if successful, will be set up to free the returned target if needed
  *
  * If the symlink's encryption key is available, we decrypt its target.
  * Otherwise, we encode its target for presentation.
@@ -217,12 +236,18 @@ const char *fscrypt_get_symlink(struct inode *inode, const void *caddr,
 {
 	const struct fscrypt_symlink_data *sd;
 	struct fscrypt_str cstr, pstr;
+	bool has_key;
 	int err;
 
 	/* This is for encrypted symlinks only */
 	if (WARN_ON(!IS_ENCRYPTED(inode)))
 		return ERR_PTR(-EINVAL);
 
+	/* If the decrypted target is already cached, just return it. */
+	pstr.name = READ_ONCE(inode->i_link);
+	if (pstr.name)
+		return pstr.name;
+
 	/*
 	 * Try to set up the symlink's encryption key, but we can continue
 	 * regardless of whether the key is available or not.
@@ -230,6 +255,7 @@ const char *fscrypt_get_symlink(struct inode *inode, const void *caddr,
 	err = fscrypt_get_encryption_info(inode);
 	if (err)
 		return ERR_PTR(err);
+	has_key = fscrypt_has_encryption_key(inode);
 
 	/*
 	 * For historical reasons, encrypted symlink targets are prefixed with
@@ -261,7 +287,17 @@ const char *fscrypt_get_symlink(struct inode *inode, const void *caddr,
 		goto err_kfree;
 
 	pstr.name[pstr.len] = '\0';
-	set_delayed_call(done, kfree_link, pstr.name);
+
+	/*
+	 * Cache decrypted symlink targets in i_link for later use.  Don't cache
+	 * symlink targets encoded without the key, since those become outdated
+	 * once the key is added.  This pairs with the READ_ONCE() above and in
+	 * the VFS path lookup code.
+	 */
+	if (!has_key ||
+	    cmpxchg_release(&inode->i_link, NULL, pstr.name) != NULL)
+		set_delayed_call(done, kfree_link, pstr.name);
+
 	return pstr.name;
 
 err_kfree:
diff --git a/fs/crypto/keyinfo.c b/fs/crypto/keyinfo.c
index 1e11a683f63d..207ebed918c1 100644
--- a/fs/crypto/keyinfo.c
+++ b/fs/crypto/keyinfo.c
@@ -12,7 +12,6 @@
 #include <keys/user-type.h>
 #include <linux/hashtable.h>
 #include <linux/scatterlist.h>
-#include <linux/ratelimit.h>
 #include <crypto/aes.h>
 #include <crypto/algapi.h>
 #include <crypto/sha.h>
@@ -47,7 +46,7 @@ static int derive_key_aes(const u8 *master_key,
 		tfm = NULL;
 		goto out;
 	}
-	crypto_skcipher_set_flags(tfm, CRYPTO_TFM_REQ_WEAK_KEY);
+	crypto_skcipher_set_flags(tfm, CRYPTO_TFM_REQ_FORBID_WEAK_KEYS);
 	req = skcipher_request_alloc(tfm, GFP_NOFS);
 	if (!req) {
 		res = -ENOMEM;
@@ -257,7 +256,7 @@ allocate_skcipher_for_mode(struct fscrypt_mode *mode, const u8 *raw_key,
 			mode->friendly_name,
 			crypto_skcipher_alg(tfm)->base.cra_driver_name);
 	}
-	crypto_skcipher_set_flags(tfm, CRYPTO_TFM_REQ_WEAK_KEY);
+	crypto_skcipher_set_flags(tfm, CRYPTO_TFM_REQ_FORBID_WEAK_KEYS);
 	err = crypto_skcipher_setkey(tfm, raw_key, mode->keysize);
 	if (err)
 		goto err_free_tfm;
@@ -402,7 +401,6 @@ static int derive_essiv_salt(const u8 *key, int keysize, u8 *salt)
 	{
 		SHASH_DESC_ON_STACK(desc, tfm);
 		desc->tfm = tfm;
-		desc->flags = 0;
 
 		return crypto_shash_digest(desc, key, keysize, salt);
 	}
@@ -509,7 +507,7 @@ int fscrypt_get_encryption_info(struct inode *inode)
 	u8 *raw_key = NULL;
 	int res;
 
-	if (inode->i_crypt_info)
+	if (fscrypt_has_encryption_key(inode))
 		return 0;
 
 	res = fscrypt_initialize(inode->i_sb->s_cop->flags);
@@ -573,7 +571,7 @@ int fscrypt_get_encryption_info(struct inode *inode)
 	if (res)
 		goto out;
 
-	if (cmpxchg(&inode->i_crypt_info, NULL, crypt_info) == NULL)
+	if (cmpxchg_release(&inode->i_crypt_info, NULL, crypt_info) == NULL)
 		crypt_info = NULL;
 out:
 	if (res == -ENOKEY)
@@ -584,9 +582,30 @@ out:
 }
 EXPORT_SYMBOL(fscrypt_get_encryption_info);
 
+/**
+ * fscrypt_put_encryption_info - free most of an inode's fscrypt data
+ *
+ * Free the inode's fscrypt_info.  Filesystems must call this when the inode is
+ * being evicted.  An RCU grace period need not have elapsed yet.
+ */
 void fscrypt_put_encryption_info(struct inode *inode)
 {
 	put_crypt_info(inode->i_crypt_info);
 	inode->i_crypt_info = NULL;
 }
 EXPORT_SYMBOL(fscrypt_put_encryption_info);
+
+/**
+ * fscrypt_free_inode - free an inode's fscrypt data requiring RCU delay
+ *
+ * Free the inode's cached decrypted symlink target, if any.  Filesystems must
+ * call this after an RCU grace period, just before they free the inode.
+ */
+void fscrypt_free_inode(struct inode *inode)
+{
+	if (IS_ENCRYPTED(inode) && S_ISLNK(inode->i_mode)) {
+		kfree(inode->i_link);
+		inode->i_link = NULL;
+	}
+}
+EXPORT_SYMBOL(fscrypt_free_inode);
diff --git a/fs/crypto/policy.c b/fs/crypto/policy.c
index f490de921ce8..4941fe8471ce 100644
--- a/fs/crypto/policy.c
+++ b/fs/crypto/policy.c
@@ -81,6 +81,8 @@ int fscrypt_ioctl_set_policy(struct file *filp, const void __user *arg)
 	if (ret == -ENODATA) {
 		if (!S_ISDIR(inode->i_mode))
 			ret = -ENOTDIR;
+		else if (IS_DEADDIR(inode))
+			ret = -ENOENT;
 		else if (!inode->i_sb->s_cop->empty_dir(inode))
 			ret = -ENOTEMPTY;
 		else
@@ -151,8 +153,7 @@ EXPORT_SYMBOL(fscrypt_ioctl_get_policy);
  * malicious offline violations of this constraint, while the link and rename
  * checks are needed to prevent online violations of this constraint.
  *
- * Return: 1 if permitted, 0 if forbidden.  If forbidden, the caller must fail
- * the filesystem operation with EPERM.
+ * Return: 1 if permitted, 0 if forbidden.
  */
 int fscrypt_has_permitted_context(struct inode *parent, struct inode *child)
 {
@@ -195,8 +196,8 @@ int fscrypt_has_permitted_context(struct inode *parent, struct inode *child)
 	res = fscrypt_get_encryption_info(child);
 	if (res)
 		return 0;
-	parent_ci = parent->i_crypt_info;
-	child_ci = child->i_crypt_info;
+	parent_ci = READ_ONCE(parent->i_crypt_info);
+	child_ci = READ_ONCE(child->i_crypt_info);
 
 	if (parent_ci && child_ci) {
 		return memcmp(parent_ci->ci_master_key_descriptor,
@@ -247,7 +248,7 @@ int fscrypt_inherit_context(struct inode *parent, struct inode *child,
 	if (res < 0)
 		return res;
 
-	ci = parent->i_crypt_info;
+	ci = READ_ONCE(parent->i_crypt_info);
 	if (ci == NULL)
 		return -ENOKEY;
 
diff --git a/fs/dax.c b/fs/dax.c
index 6959837cc465..fe5e33810cd4 100644
--- a/fs/dax.c
+++ b/fs/dax.c
@@ -1,17 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/dax.c - Direct Access filesystem code
  * Copyright (c) 2013-2014 Intel Corporation
  * Author: Matthew Wilcox <matthew.r.wilcox@intel.com>
  * Author: Ross Zwisler <ross.zwisler@linux.intel.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
  */
 
 #include <linux/atomic.h>
@@ -33,6 +25,7 @@
 #include <linux/sizes.h>
 #include <linux/mmu_notifier.h>
 #include <linux/iomap.h>
+#include <asm/pgalloc.h>
 #include "internal.h"
 
 #define CREATE_TRACE_POINTS
@@ -727,12 +720,11 @@ static void *dax_insert_entry(struct xa_state *xas,
 
 	xas_reset(xas);
 	xas_lock_irq(xas);
-	if (dax_entry_size(entry) != dax_entry_size(new_entry)) {
+	if (dax_is_zero_entry(entry) || dax_is_empty_entry(entry)) {
+		void *old;
+
 		dax_disassociate_entry(entry, mapping, false);
 		dax_associate_entry(new_entry, mapping, vmf->vma, vmf->address);
-	}
-
-	if (dax_is_zero_entry(entry) || dax_is_empty_entry(entry)) {
 		/*
 		 * Only swap our new entry into the page cache if the current
 		 * entry is a zero page or an empty entry.  If a normal PTE or
@@ -741,7 +733,7 @@ static void *dax_insert_entry(struct xa_state *xas,
 		 * existing entry is a PMD, we will just leave the PMD in the
 		 * tree and dirty it if necessary.
 		 */
-		void *old = dax_lock_entry(xas, new_entry);
+		old = dax_lock_entry(xas, new_entry);
 		WARN_ON_ONCE(old != xa_mk_value(xa_to_value(entry) |
 					DAX_LOCKED));
 		entry = new_entry;
@@ -788,7 +780,7 @@ static void dax_entry_mkclean(struct address_space *mapping, pgoff_t index,
 		address = pgoff_address(index, vma);
 
 		/*
-		 * Note because we provide start/end to follow_pte_pmd it will
+		 * Note because we provide range to follow_pte_pmd it will
 		 * call mmu_notifier_invalidate_range_start() on our behalf
 		 * before taking any lock.
 		 */
@@ -813,7 +805,7 @@ static void dax_entry_mkclean(struct address_space *mapping, pgoff_t index,
 				goto unlock_pmd;
 
 			flush_cache_page(vma, address, pfn);
-			pmd = pmdp_huge_clear_flush(vma, address, pmdp);
+			pmd = pmdp_invalidate(vma, address, pmdp);
 			pmd = pmd_wrprotect(pmd);
 			pmd = pmd_mkclean(pmd);
 			set_pmd_at(vma->vm_mm, address, pmdp, pmd);
@@ -843,9 +835,8 @@ unlock_pte:
 static int dax_writeback_one(struct xa_state *xas, struct dax_device *dax_dev,
 		struct address_space *mapping, void *entry)
 {
-	unsigned long pfn;
+	unsigned long pfn, index, count;
 	long ret = 0;
-	size_t size;
 
 	/*
 	 * A page got tagged dirty in DAX mapping? Something is seriously
@@ -894,17 +885,18 @@ static int dax_writeback_one(struct xa_state *xas, struct dax_device *dax_dev,
 	xas_unlock_irq(xas);
 
 	/*
-	 * Even if dax_writeback_mapping_range() was given a wbc->range_start
-	 * in the middle of a PMD, the 'index' we are given will be aligned to
-	 * the start index of the PMD, as will the pfn we pull from 'entry'.
+	 * If dax_writeback_mapping_range() was given a wbc->range_start
+	 * in the middle of a PMD, the 'index' we use needs to be
+	 * aligned to the start of the PMD.
 	 * This allows us to flush for PMD_SIZE and not have to worry about
 	 * partial PMD writebacks.
 	 */
 	pfn = dax_to_pfn(entry);
-	size = PAGE_SIZE << dax_entry_order(entry);
+	count = 1UL << dax_entry_order(entry);
+	index = xas->xa_index & ~(count - 1);
 
-	dax_entry_mkclean(mapping, xas->xa_index, pfn);
-	dax_flush(dax_dev, page_address(pfn_to_page(pfn)), size);
+	dax_entry_mkclean(mapping, index, pfn);
+	dax_flush(dax_dev, page_address(pfn_to_page(pfn)), count * PAGE_SIZE);
 	/*
 	 * After we have flushed the cache, we can clear the dirty tag. There
 	 * cannot be new dirty data in the pfn after the flush has completed as
@@ -917,8 +909,7 @@ static int dax_writeback_one(struct xa_state *xas, struct dax_device *dax_dev,
 	xas_clear_mark(xas, PAGECACHE_TAG_DIRTY);
 	dax_wake_entry(xas, entry, false);
 
-	trace_dax_writeback_one(mapping->host, xas->xa_index,
-			size >> PAGE_SHIFT);
+	trace_dax_writeback_one(mapping->host, index, count);
 	return ret;
 
  put_unlocked:
@@ -1196,7 +1187,7 @@ dax_iomap_rw(struct kiocb *iocb, struct iov_iter *iter,
 	unsigned flags = 0;
 
 	if (iov_iter_rw(iter) == WRITE) {
-		lockdep_assert_held_exclusive(&inode->i_rwsem);
+		lockdep_assert_held_write(&inode->i_rwsem);
 		flags |= IOMAP_WRITE;
 	} else {
 		lockdep_assert_held(&inode->i_rwsem);
@@ -1220,9 +1211,7 @@ static vm_fault_t dax_fault_return(int error)
 {
 	if (error == 0)
 		return VM_FAULT_NOPAGE;
-	if (error == -ENOMEM)
-		return VM_FAULT_OOM;
-	return VM_FAULT_SIGBUS;
+	return vmf_error(error);
 }
 
 /*
@@ -1410,7 +1399,9 @@ static vm_fault_t dax_pmd_load_hole(struct xa_state *xas, struct vm_fault *vmf,
 {
 	struct address_space *mapping = vmf->vma->vm_file->f_mapping;
 	unsigned long pmd_addr = vmf->address & PMD_MASK;
+	struct vm_area_struct *vma = vmf->vma;
 	struct inode *inode = mapping->host;
+	pgtable_t pgtable = NULL;
 	struct page *zero_page;
 	spinlock_t *ptl;
 	pmd_t pmd_entry;
@@ -1425,12 +1416,22 @@ static vm_fault_t dax_pmd_load_hole(struct xa_state *xas, struct vm_fault *vmf,
 	*entry = dax_insert_entry(xas, mapping, vmf, *entry, pfn,
 			DAX_PMD | DAX_ZERO_PAGE, false);
 
+	if (arch_needs_pgtable_deposit()) {
+		pgtable = pte_alloc_one(vma->vm_mm);
+		if (!pgtable)
+			return VM_FAULT_OOM;
+	}
+
 	ptl = pmd_lock(vmf->vma->vm_mm, vmf->pmd);
 	if (!pmd_none(*(vmf->pmd))) {
 		spin_unlock(ptl);
 		goto fallback;
 	}
 
+	if (pgtable) {
+		pgtable_trans_huge_deposit(vma->vm_mm, vmf->pmd, pgtable);
+		mm_inc_nr_ptes(vma->vm_mm);
+	}
 	pmd_entry = mk_pmd(zero_page, vmf->vma->vm_page_prot);
 	pmd_entry = pmd_mkhuge(pmd_entry);
 	set_pmd_at(vmf->vma->vm_mm, pmd_addr, vmf->pmd, pmd_entry);
@@ -1439,6 +1440,8 @@ static vm_fault_t dax_pmd_load_hole(struct xa_state *xas, struct vm_fault *vmf,
 	return VM_FAULT_NOPAGE;
 
 fallback:
+	if (pgtable)
+		pte_free(vma->vm_mm, pgtable);
 	trace_dax_pmd_load_hole_fallback(inode, vmf, zero_page, *entry);
 	return VM_FAULT_FALLBACK;
 }
@@ -1563,8 +1566,7 @@ static vm_fault_t dax_iomap_pmd_fault(struct vm_fault *vmf, pfn_t *pfnp,
 		}
 
 		trace_dax_pmd_insert_mapping(inode, vmf, PMD_SIZE, pfn, entry);
-		result = vmf_insert_pfn_pmd(vma, vmf->address, vmf->pmd, pfn,
-					    write);
+		result = vmf_insert_pfn_pmd(vmf, pfn, write);
 		break;
 	case IOMAP_UNWRITTEN:
 	case IOMAP_HOLE:
@@ -1674,8 +1676,7 @@ dax_insert_pfn_mkwrite(struct vm_fault *vmf, pfn_t pfn, unsigned int order)
 		ret = vmf_insert_mixed_mkwrite(vmf->vma, vmf->address, pfn);
 #ifdef CONFIG_FS_DAX_PMD
 	else if (order == PMD_ORDER)
-		ret = vmf_insert_pfn_pmd(vmf->vma, vmf->address, vmf->pmd,
-			pfn, true);
+		ret = vmf_insert_pfn_pmd(vmf, pfn, FAULT_FLAG_WRITE);
 #endif
 	else
 		ret = VM_FAULT_FALLBACK;
diff --git a/fs/dcache.c b/fs/dcache.c
index aac41adf4743..f41121e5d1ec 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/dcache.c
  *
@@ -18,6 +19,7 @@
 #include <linux/string.h>
 #include <linux/mm.h>
 #include <linux/fs.h>
+#include <linux/fscrypt.h>
 #include <linux/fsnotify.h>
 #include <linux/slab.h>
 #include <linux/init.h>
@@ -284,25 +286,23 @@ static inline int dname_external(const struct dentry *dentry)
 void take_dentry_name_snapshot(struct name_snapshot *name, struct dentry *dentry)
 {
 	spin_lock(&dentry->d_lock);
+	name->name = dentry->d_name;
 	if (unlikely(dname_external(dentry))) {
-		struct external_name *p = external_name(dentry);
-		atomic_inc(&p->u.count);
-		spin_unlock(&dentry->d_lock);
-		name->name = p->name;
+		atomic_inc(&external_name(dentry)->u.count);
 	} else {
 		memcpy(name->inline_name, dentry->d_iname,
 		       dentry->d_name.len + 1);
-		spin_unlock(&dentry->d_lock);
-		name->name = name->inline_name;
+		name->name.name = name->inline_name;
 	}
+	spin_unlock(&dentry->d_lock);
 }
 EXPORT_SYMBOL(take_dentry_name_snapshot);
 
 void release_dentry_name_snapshot(struct name_snapshot *name)
 {
-	if (unlikely(name->name != name->inline_name)) {
+	if (unlikely(name->name.name != name->inline_name)) {
 		struct external_name *p;
-		p = container_of(name->name, struct external_name, name[0]);
+		p = container_of(name->name.name, struct external_name, name[0]);
 		if (unlikely(atomic_dec_and_test(&p->u.count)))
 			kfree_rcu(p, u.head);
 	}
@@ -344,7 +344,7 @@ static void dentry_free(struct dentry *dentry)
 		}
 	}
 	/* if dentry was never visible to RCU, immediate free is OK */
-	if (!(dentry->d_flags & DCACHE_RCUACCESS))
+	if (dentry->d_flags & DCACHE_NORCU)
 		__d_free(&dentry->d_u.d_rcu);
 	else
 		call_rcu(&dentry->d_u.d_rcu, __d_free);
@@ -1701,7 +1701,6 @@ struct dentry *d_alloc(struct dentry * parent, const struct qstr *name)
 	struct dentry *dentry = __d_alloc(parent->d_sb, name);
 	if (!dentry)
 		return NULL;
-	dentry->d_flags |= DCACHE_RCUACCESS;
 	spin_lock(&parent->d_lock);
 	/*
 	 * don't need child lock because it is not subject
@@ -1726,7 +1725,7 @@ struct dentry *d_alloc_cursor(struct dentry * parent)
 {
 	struct dentry *dentry = d_alloc_anon(parent->d_sb);
 	if (dentry) {
-		dentry->d_flags |= DCACHE_RCUACCESS | DCACHE_DENTRY_CURSOR;
+		dentry->d_flags |= DCACHE_DENTRY_CURSOR;
 		dentry->d_parent = dget(parent);
 	}
 	return dentry;
@@ -1739,12 +1738,21 @@ struct dentry *d_alloc_cursor(struct dentry * parent)
  *
  * For a filesystem that just pins its dentries in memory and never
  * performs lookups at all, return an unhashed IS_ROOT dentry.
+ * This is used for pipes, sockets et.al. - the stuff that should
+ * never be anyone's children or parents.  Unlike all other
+ * dentries, these will not have RCU delay between dropping the
+ * last reference and freeing them.
+ *
+ * The only user is alloc_file_pseudo() and that's what should
+ * be considered a public interface.  Don't use directly.
  */
 struct dentry *d_alloc_pseudo(struct super_block *sb, const struct qstr *name)
 {
-	return __d_alloc(sb, name);
+	struct dentry *dentry = __d_alloc(sb, name);
+	if (likely(dentry))
+		dentry->d_flags |= DCACHE_NORCU;
+	return dentry;
 }
-EXPORT_SYMBOL(d_alloc_pseudo);
 
 struct dentry *d_alloc_name(struct dentry *parent, const char *name)
 {
@@ -1911,12 +1919,10 @@ struct dentry *d_make_root(struct inode *root_inode)
 
 	if (root_inode) {
 		res = d_alloc_anon(root_inode->i_sb);
-		if (res) {
-			res->d_flags |= DCACHE_RCUACCESS;
+		if (res)
 			d_instantiate(res, root_inode);
-		} else {
+		else
 			iput(root_inode);
-		}
 	}
 	return res;
 }
@@ -2366,7 +2372,6 @@ EXPORT_SYMBOL(d_hash_and_lookup);
 void d_delete(struct dentry * dentry)
 {
 	struct inode *inode = dentry->d_inode;
-	int isdir = d_is_dir(dentry);
 
 	spin_lock(&inode->i_lock);
 	spin_lock(&dentry->d_lock);
@@ -2381,7 +2386,6 @@ void d_delete(struct dentry * dentry)
 		spin_unlock(&dentry->d_lock);
 		spin_unlock(&inode->i_lock);
 	}
-	fsnotify_nameremove(dentry, isdir);
 }
 EXPORT_SYMBOL(d_delete);
 
@@ -2781,9 +2785,7 @@ static void __d_move(struct dentry *dentry, struct dentry *target,
 		copy_name(dentry, target);
 		target->d_hash.pprev = NULL;
 		dentry->d_parent->d_lockref.count++;
-		if (dentry == old_parent)
-			dentry->d_flags |= DCACHE_RCUACCESS;
-		else
+		if (dentry != old_parent) /* wasn't IS_ROOT */
 			WARN_ON(!--old_parent->d_lockref.count);
 	} else {
 		target->d_parent = old_parent;
@@ -2795,6 +2797,7 @@ static void __d_move(struct dentry *dentry, struct dentry *target,
 	list_move(&dentry->d_child, &dentry->d_parent->d_subdirs);
 	__d_rehash(dentry);
 	fsnotify_update_flags(dentry);
+	fscrypt_handle_d_move(dentry);
 
 	write_seqcount_end(&target->d_seq);
 	write_seqcount_end(&dentry->d_seq);
diff --git a/fs/dcookies.c b/fs/dcookies.c
index 57bc96435feb..6eeb61100a09 100644
--- a/fs/dcookies.c
+++ b/fs/dcookies.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * dcookies.c
  *
diff --git a/fs/debugfs/Makefile b/fs/debugfs/Makefile
index 840c45696668..9c0fe38cfb5e 100644
--- a/fs/debugfs/Makefile
+++ b/fs/debugfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 debugfs-objs	:= inode.o file.o
 
 obj-$(CONFIG_DEBUG_FS)	+= debugfs.o
diff --git a/fs/debugfs/file.c b/fs/debugfs/file.c
index 4fce1da7db23..93e4ca6b2ad7 100644
--- a/fs/debugfs/file.c
+++ b/fs/debugfs/file.c
@@ -394,12 +394,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u8_wo, NULL, debugfs_u8_set, "%llu\n");
  * This function will return a pointer to a dentry if it succeeds.  This
  * pointer must be passed to the debugfs_remove() function when the file is
  * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.)  If an error occurs, %NULL will be returned.
+ * you are responsible here.)  If an error occurs, %ERR_PTR(-ERROR) will be
+ * returned.
  *
- * If debugfs is not enabled in the kernel, the value -%ENODEV will be
- * returned.  It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * be returned.
  */
 struct dentry *debugfs_create_u8(const char *name, umode_t mode,
 				 struct dentry *parent, u8 *value)
@@ -440,12 +439,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u16_wo, NULL, debugfs_u16_set, "%llu\n");
  * This function will return a pointer to a dentry if it succeeds.  This
  * pointer must be passed to the debugfs_remove() function when the file is
  * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.)  If an error occurs, %NULL will be returned.
+ * you are responsible here.)  If an error occurs, %ERR_PTR(-ERROR) will be
+ * returned.
  *
- * If debugfs is not enabled in the kernel, the value -%ENODEV will be
- * returned.  It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * be returned.
  */
 struct dentry *debugfs_create_u16(const char *name, umode_t mode,
 				  struct dentry *parent, u16 *value)
@@ -486,12 +484,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u32_wo, NULL, debugfs_u32_set, "%llu\n");
  * This function will return a pointer to a dentry if it succeeds.  This
  * pointer must be passed to the debugfs_remove() function when the file is
  * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.)  If an error occurs, %NULL will be returned.
+ * you are responsible here.)  If an error occurs, %ERR_PTR(-ERROR) will be
+ * returned.
  *
- * If debugfs is not enabled in the kernel, the value -%ENODEV will be
- * returned.  It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * be returned.
  */
 struct dentry *debugfs_create_u32(const char *name, umode_t mode,
 				 struct dentry *parent, u32 *value)
@@ -533,12 +530,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_u64_wo, NULL, debugfs_u64_set, "%llu\n");
  * This function will return a pointer to a dentry if it succeeds.  This
  * pointer must be passed to the debugfs_remove() function when the file is
  * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.)  If an error occurs, %NULL will be returned.
+ * you are responsible here.)  If an error occurs, %ERR_PTR(-ERROR) will be
+ * returned.
  *
- * If debugfs is not enabled in the kernel, the value -%ENODEV will be
- * returned.  It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * be returned.
  */
 struct dentry *debugfs_create_u64(const char *name, umode_t mode,
 				 struct dentry *parent, u64 *value)
@@ -582,12 +578,11 @@ DEFINE_DEBUGFS_ATTRIBUTE(fops_ulong_wo, NULL, debugfs_ulong_set, "%llu\n");
  * This function will return a pointer to a dentry if it succeeds.  This
  * pointer must be passed to the debugfs_remove() function when the file is
  * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.)  If an error occurs, %NULL will be returned.
+ * you are responsible here.)  If an error occurs, %ERR_PTR(-ERROR) will be
+ * returned.
  *
- * If debugfs is not enabled in the kernel, the value -%ENODEV will be
- * returned.  It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * be returned.
  */
 struct dentry *debugfs_create_ulong(const char *name, umode_t mode,
 				    struct dentry *parent, unsigned long *value)
@@ -850,12 +845,11 @@ static const struct file_operations fops_bool_wo = {
  * This function will return a pointer to a dentry if it succeeds.  This
  * pointer must be passed to the debugfs_remove() function when the file is
  * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.)  If an error occurs, %NULL will be returned.
+ * you are responsible here.)  If an error occurs, %ERR_PTR(-ERROR) will be
+ * returned.
  *
- * If debugfs is not enabled in the kernel, the value -%ENODEV will be
- * returned.  It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * be returned.
  */
 struct dentry *debugfs_create_bool(const char *name, umode_t mode,
 				   struct dentry *parent, bool *value)
@@ -904,12 +898,11 @@ static const struct file_operations fops_blob = {
  * This function will return a pointer to a dentry if it succeeds.  This
  * pointer must be passed to the debugfs_remove() function when the file is
  * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.)  If an error occurs, %NULL will be returned.
+ * you are responsible here.)  If an error occurs, %ERR_PTR(-ERROR) will be
+ * returned.
  *
- * If debugfs is not enabled in the kernel, the value -%ENODEV will be
- * returned.  It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * be returned.
  */
 struct dentry *debugfs_create_blob(const char *name, umode_t mode,
 				   struct dentry *parent,
@@ -1004,24 +997,19 @@ static const struct file_operations u32_array_fops = {
  * @array as data. If the @mode variable is so set it can be read from.
  * Writing is not supported. Seek within the file is also not supported.
  * Once array is created its size can not be changed.
- *
- * The function returns a pointer to dentry on success. If debugfs is not
- * enabled in the kernel, the value -%ENODEV will be returned.
  */
-struct dentry *debugfs_create_u32_array(const char *name, umode_t mode,
-					    struct dentry *parent,
-					    u32 *array, u32 elements)
+void debugfs_create_u32_array(const char *name, umode_t mode,
+			      struct dentry *parent, u32 *array, u32 elements)
 {
 	struct array_data *data = kmalloc(sizeof(*data), GFP_KERNEL);
 
 	if (data == NULL)
-		return NULL;
+		return;
 
 	data->array = array;
 	data->elements = elements;
 
-	return debugfs_create_file_unsafe(name, mode, parent, data,
-					&u32_array_fops);
+	debugfs_create_file_unsafe(name, mode, parent, data, &u32_array_fops);
 }
 EXPORT_SYMBOL_GPL(debugfs_create_u32_array);
 
@@ -1102,12 +1090,11 @@ static const struct file_operations fops_regset32 = {
  * This function will return a pointer to a dentry if it succeeds.  This
  * pointer must be passed to the debugfs_remove() function when the file is
  * to be removed (no automatic cleanup happens if your module is unloaded,
- * you are responsible here.)  If an error occurs, %NULL will be returned.
+ * you are responsible here.)  If an error occurs, %ERR_PTR(-ERROR) will be
+ * returned.
  *
- * If debugfs is not enabled in the kernel, the value -%ENODEV will be
- * returned.  It is not wise to check for this value, but rather, check for
- * %NULL or !%NULL instead as to eliminate the need for #ifdef in the calling
- * code.
+ * If debugfs is not enabled in the kernel, the value %ERR_PTR(-ENODEV) will
+ * be returned.
  */
 struct dentry *debugfs_create_regset32(const char *name, umode_t mode,
 				       struct dentry *parent,
diff --git a/fs/debugfs/inode.c b/fs/debugfs/inode.c
index 29c68c5d44d5..042b688ed124 100644
--- a/fs/debugfs/inode.c
+++ b/fs/debugfs/inode.c
@@ -2,13 +2,16 @@
 /*
  *  inode.c - part of debugfs, a tiny little debug file system
  *
- *  Copyright (C) 2004 Greg Kroah-Hartman <greg@kroah.com>
+ *  Copyright (C) 2004,2019 Greg Kroah-Hartman <greg@kroah.com>
  *  Copyright (C) 2004 IBM Inc.
+ *  Copyright (C) 2019 Linux Foundation <gregkh@linuxfoundation.org>
  *
  *  debugfs is for people to use instead of /proc or /sys.
  *  See ./Documentation/core-api/kernel-api.rst for more details.
  */
 
+#define pr_fmt(fmt)	"debugfs: " fmt
+
 #include <linux/module.h>
 #include <linux/fs.h>
 #include <linux/mount.h>
@@ -163,19 +166,18 @@ static int debugfs_show_options(struct seq_file *m, struct dentry *root)
 	return 0;
 }
 
-static void debugfs_evict_inode(struct inode *inode)
+static void debugfs_free_inode(struct inode *inode)
 {
-	truncate_inode_pages_final(&inode->i_data);
-	clear_inode(inode);
 	if (S_ISLNK(inode->i_mode))
 		kfree(inode->i_link);
+	free_inode_nonrcu(inode);
 }
 
 static const struct super_operations debugfs_super_operations = {
 	.statfs		= simple_statfs,
 	.remount_fs	= debugfs_remount,
 	.show_options	= debugfs_show_options,
-	.evict_inode	= debugfs_evict_inode,
+	.free_inode	= debugfs_free_inode,
 };
 
 static void debugfs_release_dentry(struct dentry *dentry)
@@ -286,15 +288,17 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
 	struct dentry *dentry;
 	int error;
 
-	pr_debug("debugfs: creating file '%s'\n",name);
+	pr_debug("creating file '%s'\n", name);
 
 	if (IS_ERR(parent))
 		return parent;
 
 	error = simple_pin_fs(&debug_fs_type, &debugfs_mount,
 			      &debugfs_mount_count);
-	if (error)
+	if (error) {
+		pr_err("Unable to pin filesystem for file '%s'\n", name);
 		return ERR_PTR(error);
+	}
 
 	/* If the parent is not specified, we create it in the root.
 	 * We need the root dentry to do this, which is in the super
@@ -307,6 +311,12 @@ static struct dentry *start_creating(const char *name, struct dentry *parent)
 	inode_lock(d_inode(parent));
 	dentry = lookup_one_len(name, parent, strlen(name));
 	if (!IS_ERR(dentry) && d_really_is_positive(dentry)) {
+		if (d_is_dir(dentry))
+			pr_err("Directory '%s' with parent '%s' already present!\n",
+			       name, parent->d_name.name);
+		else
+			pr_err("File '%s' in directory '%s' already present!\n",
+			       name, parent->d_name.name);
 		dput(dentry);
 		dentry = ERR_PTR(-EEXIST);
 	}
@@ -350,8 +360,11 @@ static struct dentry *__debugfs_create_file(const char *name, umode_t mode,
 		return dentry;
 
 	inode = debugfs_get_inode(dentry->d_sb);
-	if (unlikely(!inode))
+	if (unlikely(!inode)) {
+		pr_err("out of free dentries, can not create file '%s'\n",
+		       name);
 		return failed_creating(dentry);
+	}
 
 	inode->i_mode = mode;
 	inode->i_private = data;
@@ -423,8 +436,8 @@ EXPORT_SYMBOL_GPL(debugfs_create_file);
  * debugfs core.
  *
  * It is your responsibility to protect your struct file_operation
- * methods against file removals by means of debugfs_use_file_start()
- * and debugfs_use_file_finish(). ->open() is still protected by
+ * methods against file removals by means of debugfs_file_get()
+ * and debugfs_file_put(). ->open() is still protected by
  * debugfs though.
  *
  * Any struct file_operations defined by means of
@@ -512,8 +525,11 @@ struct dentry *debugfs_create_dir(const char *name, struct dentry *parent)
 		return dentry;
 
 	inode = debugfs_get_inode(dentry->d_sb);
-	if (unlikely(!inode))
+	if (unlikely(!inode)) {
+		pr_err("out of free dentries, can not create directory '%s'\n",
+		       name);
 		return failed_creating(dentry);
+	}
 
 	inode->i_mode = S_IFDIR | S_IRWXU | S_IRUGO | S_IXUGO;
 	inode->i_op = &simple_dir_inode_operations;
@@ -551,8 +567,11 @@ struct dentry *debugfs_create_automount(const char *name,
 		return dentry;
 
 	inode = debugfs_get_inode(dentry->d_sb);
-	if (unlikely(!inode))
+	if (unlikely(!inode)) {
+		pr_err("out of free dentries, can not create automount '%s'\n",
+		       name);
 		return failed_creating(dentry);
+	}
 
 	make_empty_dir_inode(inode);
 	inode->i_flags |= S_AUTOMOUNT;
@@ -607,6 +626,8 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
 
 	inode = debugfs_get_inode(dentry->d_sb);
 	if (unlikely(!inode)) {
+		pr_err("out of free dentries, can not create symlink '%s'\n",
+		       name);
 		kfree(link);
 		return failed_creating(dentry);
 	}
@@ -618,13 +639,10 @@ struct dentry *debugfs_create_symlink(const char *name, struct dentry *parent,
 }
 EXPORT_SYMBOL_GPL(debugfs_create_symlink);
 
-static void __debugfs_remove_file(struct dentry *dentry, struct dentry *parent)
+static void __debugfs_file_removed(struct dentry *dentry)
 {
 	struct debugfs_fsdata *fsd;
 
-	simple_unlink(d_inode(parent), dentry);
-	d_delete(dentry);
-
 	/*
 	 * Paired with the closing smp_mb() implied by a successful
 	 * cmpxchg() in debugfs_file_get(): either
@@ -645,16 +663,18 @@ static int __debugfs_remove(struct dentry *dentry, struct dentry *parent)
 
 	if (simple_positive(dentry)) {
 		dget(dentry);
-		if (!d_is_reg(dentry)) {
-			if (d_is_dir(dentry))
-				ret = simple_rmdir(d_inode(parent), dentry);
-			else
-				simple_unlink(d_inode(parent), dentry);
+		if (d_is_dir(dentry)) {
+			ret = simple_rmdir(d_inode(parent), dentry);
 			if (!ret)
-				d_delete(dentry);
+				fsnotify_rmdir(d_inode(parent), dentry);
 		} else {
-			__debugfs_remove_file(dentry, parent);
+			simple_unlink(d_inode(parent), dentry);
+			fsnotify_unlink(d_inode(parent), dentry);
 		}
+		if (!ret)
+			d_delete(dentry);
+		if (d_is_reg(dentry))
+			__debugfs_file_removed(dentry);
 		dput(dentry);
 	}
 	return ret;
@@ -819,7 +839,7 @@ struct dentry *debugfs_rename(struct dentry *old_dir, struct dentry *old_dentry,
 		goto exit;
 	}
 	d_move(old_dentry, dentry);
-	fsnotify_move(d_inode(old_dir), d_inode(new_dir), old_name.name,
+	fsnotify_move(d_inode(old_dir), d_inode(new_dir), &old_name.name,
 		d_is_dir(old_dentry),
 		NULL, old_dentry);
 	release_dentry_name_snapshot(&old_name);
diff --git a/fs/devpts/Makefile b/fs/devpts/Makefile
index 236696efcbac..66064c8fcb3e 100644
--- a/fs/devpts/Makefile
+++ b/fs/devpts/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux /dev/pts virtual filesystem.
 #
diff --git a/fs/devpts/inode.c b/fs/devpts/inode.c
index c53814539070..beeadca23b05 100644
--- a/fs/devpts/inode.c
+++ b/fs/devpts/inode.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- linux-c -*- --------------------------------------------------------- *
  *
  * linux/fs/devpts/inode.c
  *
  *  Copyright 1998-2004 H. Peter Anvin -- All Rights Reserved
  *
- * This file is part of the Linux kernel and is made available under
- * the terms of the GNU General Public License, version 2, or at your
- * option, any later version, incorporated herein by reference.
- *
  * ------------------------------------------------------------------------- */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -455,6 +452,7 @@ devpts_fill_super(struct super_block *s, void *data, int silent)
 	s->s_blocksize_bits = 10;
 	s->s_magic = DEVPTS_SUPER_MAGIC;
 	s->s_op = &devpts_sops;
+	s->s_d_op = &simple_dentry_operations;
 	s->s_time_gran = 1;
 
 	error = -ENOMEM;
@@ -623,6 +621,7 @@ void devpts_pty_kill(struct dentry *dentry)
 
 	dentry->d_fsdata = NULL;
 	drop_nlink(dentry->d_inode);
+	fsnotify_unlink(d_inode(dentry->d_parent), dentry);
 	d_delete(dentry);
 	dput(dentry);	/* d_alloc_name() in devpts_pty_new() */
 }
diff --git a/fs/direct-io.c b/fs/direct-io.c
index ec2fb6fe6d37..ae196784f487 100644
--- a/fs/direct-io.c
+++ b/fs/direct-io.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/direct-io.c
  *
@@ -537,9 +538,8 @@ static struct bio *dio_await_one(struct dio *dio)
  */
 static blk_status_t dio_bio_complete(struct dio *dio, struct bio *bio)
 {
-	struct bio_vec *bvec;
-	unsigned i;
 	blk_status_t err = bio->bi_status;
+	bool should_dirty = dio->op == REQ_OP_READ && dio->should_dirty;
 
 	if (err) {
 		if (err == BLK_STS_AGAIN && (bio->bi_opf & REQ_NOWAIT))
@@ -548,17 +548,10 @@ static blk_status_t dio_bio_complete(struct dio *dio, struct bio *bio)
 			dio->io_error = -EIO;
 	}
 
-	if (dio->is_async && dio->op == REQ_OP_READ && dio->should_dirty) {
+	if (dio->is_async && should_dirty) {
 		bio_check_pages_dirty(bio);	/* transfers ownership */
 	} else {
-		bio_for_each_segment_all(bvec, bio, i) {
-			struct page *page = bvec->bv_page;
-
-			if (dio->op == REQ_OP_READ && !PageCompound(page) &&
-					dio->should_dirty)
-				set_page_dirty_lock(page);
-			put_page(page);
-		}
+		bio_release_pages(bio, should_dirty);
 		bio_put(bio);
 	}
 	return err;
diff --git a/fs/dlm/Kconfig b/fs/dlm/Kconfig
index e4242c3f8486..f82a4952769d 100644
--- a/fs/dlm/Kconfig
+++ b/fs/dlm/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 menuconfig DLM
 	tristate "Distributed Lock Manager (DLM)"
 	depends on INET
diff --git a/fs/dlm/ast.c b/fs/dlm/ast.c
index 47ee66d70109..283c7b94edda 100644
--- a/fs/dlm/ast.c
+++ b/fs/dlm/ast.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2010 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/ast.h b/fs/dlm/ast.h
index 757b551c6820..181ad7d20c4d 100644
--- a/fs/dlm/ast.h
+++ b/fs/dlm/ast.h
@@ -1,11 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005-2010 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index 1270551d24e3..3b21082e1b55 100644
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/config.h b/fs/dlm/config.h
index 6041eec886ab..2b471aae4e61 100644
--- a/fs/dlm/config.h
+++ b/fs/dlm/config.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index fa08448e35dd..d6bbccb0ed15 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -1,11 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005-2009 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
@@ -739,7 +737,7 @@ void dlm_delete_debug_file(struct dlm_ls *ls)
 	debugfs_remove(ls->ls_debug_toss_dentry);
 }
 
-int dlm_create_debug_file(struct dlm_ls *ls)
+void dlm_create_debug_file(struct dlm_ls *ls)
 {
 	char name[DLM_LOCKSPACE_LEN + 8];
 
@@ -750,8 +748,6 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 						      dlm_root,
 						      ls,
 						      &format1_fops);
-	if (!ls->ls_debug_rsb_dentry)
-		goto fail;
 
 	/* format 2 */
 
@@ -763,8 +759,6 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 							dlm_root,
 							ls,
 							&format2_fops);
-	if (!ls->ls_debug_locks_dentry)
-		goto fail;
 
 	/* format 3 */
 
@@ -776,8 +770,6 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 						      dlm_root,
 						      ls,
 						      &format3_fops);
-	if (!ls->ls_debug_all_dentry)
-		goto fail;
 
 	/* format 4 */
 
@@ -789,8 +781,6 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 						       dlm_root,
 						       ls,
 						       &format4_fops);
-	if (!ls->ls_debug_toss_dentry)
-		goto fail;
 
 	memset(name, 0, sizeof(name));
 	snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_waiters", ls->ls_name);
@@ -800,21 +790,12 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 							  dlm_root,
 							  ls,
 							  &waiters_fops);
-	if (!ls->ls_debug_waiters_dentry)
-		goto fail;
-
-	return 0;
-
- fail:
-	dlm_delete_debug_file(ls);
-	return -ENOMEM;
 }
 
-int __init dlm_register_debugfs(void)
+void __init dlm_register_debugfs(void)
 {
 	mutex_init(&debug_buf_lock);
 	dlm_root = debugfs_create_dir("dlm", NULL);
-	return dlm_root ? 0 : -ENOMEM;
 }
 
 void dlm_unregister_debugfs(void)
diff --git a/fs/dlm/dir.c b/fs/dlm/dir.c
index d975851a7e1e..10c36ae1a8f9 100644
--- a/fs/dlm/dir.c
+++ b/fs/dlm/dir.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/dir.h b/fs/dlm/dir.h
index 417506344456..03844d086be2 100644
--- a/fs/dlm/dir.h
+++ b/fs/dlm/dir.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/dlm_internal.h b/fs/dlm/dlm_internal.h
index 748e8d59e611..416d9de35679 100644
--- a/fs/dlm/dlm_internal.h
+++ b/fs/dlm/dlm_internal.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
@@ -721,14 +719,14 @@ int dlm_plock_init(void);
 void dlm_plock_exit(void);
 
 #ifdef CONFIG_DLM_DEBUG
-int dlm_register_debugfs(void);
+void dlm_register_debugfs(void);
 void dlm_unregister_debugfs(void);
-int dlm_create_debug_file(struct dlm_ls *ls);
+void dlm_create_debug_file(struct dlm_ls *ls);
 void dlm_delete_debug_file(struct dlm_ls *ls);
 #else
-static inline int dlm_register_debugfs(void) { return 0; }
+static inline void dlm_register_debugfs(void) { }
 static inline void dlm_unregister_debugfs(void) { }
-static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; }
+static inline void dlm_create_debug_file(struct dlm_ls *ls) { }
 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
 #endif
 
diff --git a/fs/dlm/lock.c b/fs/dlm/lock.c
index a928ba008d7d..18d81599522f 100644
--- a/fs/dlm/lock.c
+++ b/fs/dlm/lock.c
@@ -1,11 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005-2010 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/lock.h b/fs/dlm/lock.h
index ed8ebd3a8593..456c6ec3ef6f 100644
--- a/fs/dlm/lock.h
+++ b/fs/dlm/lock.h
@@ -1,11 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/lockspace.c b/fs/dlm/lockspace.c
index db43b98c4d64..afb8340918b8 100644
--- a/fs/dlm/lockspace.c
+++ b/fs/dlm/lockspace.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
@@ -160,6 +158,7 @@ static struct attribute *dlm_attrs[] = {
 	&dlm_attr_recover_nodeid.attr,
 	NULL,
 };
+ATTRIBUTE_GROUPS(dlm);
 
 static ssize_t dlm_attr_show(struct kobject *kobj, struct attribute *attr,
 			     char *buf)
@@ -189,7 +188,7 @@ static const struct sysfs_ops dlm_attr_ops = {
 };
 
 static struct kobj_type dlm_ktype = {
-	.default_attrs = dlm_attrs,
+	.default_groups = dlm_groups,
 	.sysfs_ops     = &dlm_attr_ops,
 	.release       = lockspace_kobj_release,
 };
diff --git a/fs/dlm/lockspace.h b/fs/dlm/lockspace.h
index f879f87901f8..a78d853b9342 100644
--- a/fs/dlm/lockspace.h
+++ b/fs/dlm/lockspace.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index 76976d6e50f9..3951d39b9b75 100644
--- a/fs/dlm/lowcomms.c
+++ b/fs/dlm/lowcomms.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2009 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
@@ -1089,12 +1087,12 @@ static void sctp_connect_to_sock(struct connection *con)
 	 * since O_NONBLOCK argument in connect() function does not work here,
 	 * then, we should restore the default value of this attribute.
 	 */
-	kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv,
+	kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_OLD, (char *)&tv,
 			  sizeof(tv));
 	result = sock->ops->connect(sock, (struct sockaddr *)&daddr, addr_len,
 				   0);
 	memset(&tv, 0, sizeof(tv));
-	kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO, (char *)&tv,
+	kernel_setsockopt(sock, SOL_SOCKET, SO_SNDTIMEO_OLD, (char *)&tv,
 			  sizeof(tv));
 
 	if (result == -EINPROGRESS)
@@ -1630,8 +1628,10 @@ static void clean_writequeues(void)
 
 static void work_stop(void)
 {
-	destroy_workqueue(recv_workqueue);
-	destroy_workqueue(send_workqueue);
+	if (recv_workqueue)
+		destroy_workqueue(recv_workqueue);
+	if (send_workqueue)
+		destroy_workqueue(send_workqueue);
 }
 
 static int work_start(void)
@@ -1691,13 +1691,17 @@ static void work_flush(void)
 	struct hlist_node *n;
 	struct connection *con;
 
-	flush_workqueue(recv_workqueue);
-	flush_workqueue(send_workqueue);
+	if (recv_workqueue)
+		flush_workqueue(recv_workqueue);
+	if (send_workqueue)
+		flush_workqueue(send_workqueue);
 	do {
 		ok = 1;
 		foreach_conn(stop_conn);
-		flush_workqueue(recv_workqueue);
-		flush_workqueue(send_workqueue);
+		if (recv_workqueue)
+			flush_workqueue(recv_workqueue);
+		if (send_workqueue)
+			flush_workqueue(send_workqueue);
 		for (i = 0; i < CONN_HASH_SIZE && ok; i++) {
 			hlist_for_each_entry_safe(con, n,
 						  &connection_hash[i], list) {
diff --git a/fs/dlm/lowcomms.h b/fs/dlm/lowcomms.h
index 67462e54fc2f..687b2894e469 100644
--- a/fs/dlm/lowcomms.h
+++ b/fs/dlm/lowcomms.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2009 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/lvb_table.h b/fs/dlm/lvb_table.h
index cc3e92f3feef..09052d967174 100644
--- a/fs/dlm/lvb_table.h
+++ b/fs/dlm/lvb_table.h
@@ -1,11 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/main.c b/fs/dlm/main.c
index 8e1b618891be..afc66a1346d3 100644
--- a/fs/dlm/main.c
+++ b/fs/dlm/main.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
@@ -37,9 +35,7 @@ static int __init init_dlm(void)
 	if (error)
 		goto out_lockspace;
 
-	error = dlm_register_debugfs();
-	if (error)
-		goto out_config;
+	dlm_register_debugfs();
 
 	error = dlm_user_init();
 	if (error)
@@ -63,7 +59,6 @@ static int __init init_dlm(void)
 	dlm_user_exit();
  out_debug:
 	dlm_unregister_debugfs();
- out_config:
 	dlm_config_exit();
  out_lockspace:
 	dlm_lockspace_exit();
diff --git a/fs/dlm/member.c b/fs/dlm/member.c
index 0bc43b35d2c5..7ad83deb4505 100644
--- a/fs/dlm/member.c
+++ b/fs/dlm/member.c
@@ -1,11 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005-2011 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/member.h b/fs/dlm/member.h
index 3deb70661c69..433b2fac9f4a 100644
--- a/fs/dlm/member.h
+++ b/fs/dlm/member.h
@@ -1,11 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005-2011 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/memory.c b/fs/dlm/memory.c
index 37be29f21d04..5918f4d39586 100644
--- a/fs/dlm/memory.c
+++ b/fs/dlm/memory.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/memory.h b/fs/dlm/memory.h
index 177c11cbb0a6..4f218ea4b187 100644
--- a/fs/dlm/memory.h
+++ b/fs/dlm/memory.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/midcomms.c b/fs/dlm/midcomms.c
index f3396c622aec..921322d133e3 100644
--- a/fs/dlm/midcomms.c
+++ b/fs/dlm/midcomms.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/midcomms.h b/fs/dlm/midcomms.h
index 95852a5f111d..2e122e81c8d0 100644
--- a/fs/dlm/midcomms.h
+++ b/fs/dlm/midcomms.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/netlink.c b/fs/dlm/netlink.c
index 43a96c330570..e7f550327d5d 100644
--- a/fs/dlm/netlink.c
+++ b/fs/dlm/netlink.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2007 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
  */
 
 #include <net/genetlink.h>
@@ -68,6 +65,7 @@ static int user_cmd(struct sk_buff *skb, struct genl_info *info)
 static const struct genl_ops dlm_nl_ops[] = {
 	{
 		.cmd	= DLM_CMD_HELLO,
+		.validate = GENL_DONT_VALIDATE_STRICT | GENL_DONT_VALIDATE_DUMP,
 		.doit	= user_cmd,
 	},
 };
diff --git a/fs/dlm/plock.c b/fs/dlm/plock.c
index c7d5a2ea3d03..c38b2b8ffd1d 100644
--- a/fs/dlm/plock.c
+++ b/fs/dlm/plock.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/fs.h>
diff --git a/fs/dlm/rcom.c b/fs/dlm/rcom.c
index 70c625999d36..e3d9f72c640d 100644
--- a/fs/dlm/rcom.c
+++ b/fs/dlm/rcom.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/rcom.h b/fs/dlm/rcom.h
index 206723ab744d..454d3c4814ab 100644
--- a/fs/dlm/rcom.h
+++ b/fs/dlm/rcom.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/recover.c b/fs/dlm/recover.c
index ce2aa54ca2e2..8928e99dfd47 100644
--- a/fs/dlm/recover.c
+++ b/fs/dlm/recover.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/recover.h b/fs/dlm/recover.h
index d8c8738c70eb..235e0d25cd48 100644
--- a/fs/dlm/recover.h
+++ b/fs/dlm/recover.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/recoverd.c b/fs/dlm/recoverd.c
index 6f4e1d42d733..85e245392715 100644
--- a/fs/dlm/recoverd.c
+++ b/fs/dlm/recoverd.c
@@ -1,12 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/recoverd.h b/fs/dlm/recoverd.h
index 8856079733fa..d1944dc5f9e6 100644
--- a/fs/dlm/recoverd.h
+++ b/fs/dlm/recoverd.h
@@ -1,12 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) Sistina Software, Inc.  1997-2003  All rights reserved.
 **  Copyright (C) 2004-2005 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/requestqueue.c b/fs/dlm/requestqueue.c
index 1695f1b0dd45..e89e0ff8bfa3 100644
--- a/fs/dlm/requestqueue.c
+++ b/fs/dlm/requestqueue.c
@@ -1,11 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/requestqueue.h b/fs/dlm/requestqueue.h
index 10ce449b77da..4e403469a845 100644
--- a/fs/dlm/requestqueue.h
+++ b/fs/dlm/requestqueue.h
@@ -1,11 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005-2007 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/user.c b/fs/dlm/user.c
index 3c84c62dadb7..5264bac75115 100644
--- a/fs/dlm/user.c
+++ b/fs/dlm/user.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2006-2010 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
  */
 
 #include <linux/miscdevice.h>
diff --git a/fs/dlm/user.h b/fs/dlm/user.h
index 00499ab8835f..6b9bce6b96e0 100644
--- a/fs/dlm/user.h
+++ b/fs/dlm/user.h
@@ -1,9 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2006-2010 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License v.2.
  */
 
 #ifndef __USER_DOT_H__
diff --git a/fs/dlm/util.c b/fs/dlm/util.c
index e36520af7cc0..cfd0d00b19ae 100644
--- a/fs/dlm/util.c
+++ b/fs/dlm/util.c
@@ -1,11 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005-2008 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/dlm/util.h b/fs/dlm/util.h
index 2b25915161c0..cc719ca9397e 100644
--- a/fs/dlm/util.h
+++ b/fs/dlm/util.h
@@ -1,11 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /******************************************************************************
 *******************************************************************************
 **
 **  Copyright (C) 2005 Red Hat, Inc.  All rights reserved.
 **
-**  This copyrighted material is made available to anyone wishing to use,
-**  modify, copy, or redistribute it subject to the terms and conditions
-**  of the GNU General Public License v.2.
 **
 *******************************************************************************
 ******************************************************************************/
diff --git a/fs/ecryptfs/Kconfig b/fs/ecryptfs/Kconfig
index 434aa313f077..522c35d5292b 100644
--- a/fs/ecryptfs/Kconfig
+++ b/fs/ecryptfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config ECRYPT_FS
 	tristate "eCrypt filesystem layer support"
 	depends on KEYS && CRYPTO && (ENCRYPTED_KEYS || ENCRYPTED_KEYS=n)
diff --git a/fs/ecryptfs/Makefile b/fs/ecryptfs/Makefile
index 49678a69947d..4f2cc5b2542d 100644
--- a/fs/ecryptfs/Makefile
+++ b/fs/ecryptfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux eCryptfs
 #
diff --git a/fs/ecryptfs/crypto.c b/fs/ecryptfs/crypto.c
index d8e47b75bc57..f91db24bbf3b 100644
--- a/fs/ecryptfs/crypto.c
+++ b/fs/ecryptfs/crypto.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
@@ -6,21 +7,6 @@
  * Copyright (C) 2004-2007 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
  *   		Michael C. Thompson <mcthomps@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <crypto/hash.h>
@@ -69,7 +55,6 @@ static int ecryptfs_hash_digest(struct crypto_shash *tfm,
 	int err;
 
 	desc->tfm = tfm;
-	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 	err = crypto_shash_digest(desc, src, len, dst);
 	shash_desc_zero(desc);
 	return err;
@@ -611,7 +596,8 @@ int ecryptfs_init_crypt_ctx(struct ecryptfs_crypt_stat *crypt_stat)
 				full_alg_name);
 		goto out_free;
 	}
-	crypto_skcipher_set_flags(crypt_stat->tfm, CRYPTO_TFM_REQ_WEAK_KEY);
+	crypto_skcipher_set_flags(crypt_stat->tfm,
+				  CRYPTO_TFM_REQ_FORBID_WEAK_KEYS);
 	rc = 0;
 out_free:
 	kfree(full_alg_name);
@@ -1598,7 +1584,7 @@ ecryptfs_process_key_cipher(struct crypto_skcipher **key_tfm,
 		       "[%s]; rc = [%d]\n", full_alg_name, rc);
 		goto out;
 	}
-	crypto_skcipher_set_flags(*key_tfm, CRYPTO_TFM_REQ_WEAK_KEY);
+	crypto_skcipher_set_flags(*key_tfm, CRYPTO_TFM_REQ_FORBID_WEAK_KEYS);
 	if (*key_size == 0)
 		*key_size = crypto_skcipher_default_keysize(*key_tfm);
 	get_random_bytes(dummy_key, *key_size);
diff --git a/fs/ecryptfs/debug.c b/fs/ecryptfs/debug.c
index ee9d8ac4a809..1f65e99f9a41 100644
--- a/fs/ecryptfs/debug.c
+++ b/fs/ecryptfs/debug.c
@@ -1,24 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  * Functions only useful for debugging.
  *
  * Copyright (C) 2006 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include "ecryptfs_kernel.h"
diff --git a/fs/ecryptfs/dentry.c b/fs/ecryptfs/dentry.c
index 63cd2c147221..44606f079efb 100644
--- a/fs/ecryptfs/dentry.c
+++ b/fs/ecryptfs/dentry.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
@@ -5,21 +6,6 @@
  * Copyright (C) 2001-2003 Stony Brook University
  * Copyright (C) 2004-2006 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <linux/dcache.h>
diff --git a/fs/ecryptfs/ecryptfs_kernel.h b/fs/ecryptfs/ecryptfs_kernel.h
index e74cb2a0b299..1c1a56be7ea2 100644
--- a/fs/ecryptfs/ecryptfs_kernel.h
+++ b/fs/ecryptfs/ecryptfs_kernel.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /**
  * eCryptfs: Linux filesystem encryption layer
  * Kernel declarations.
@@ -8,21 +9,6 @@
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
  *              Trevor S. Highland <trevor.highland@gmail.com>
  *              Tyler Hicks <tyhicks@ou.edu>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #ifndef ECRYPTFS_KERNEL_H
diff --git a/fs/ecryptfs/file.c b/fs/ecryptfs/file.c
index b76a9853325e..feecb57defa7 100644
--- a/fs/ecryptfs/file.c
+++ b/fs/ecryptfs/file.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
@@ -6,21 +7,6 @@
  * Copyright (C) 2004-2007 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mhalcrow@us.ibm.com>
  *   		Michael C. Thompson <mcthomps@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <linux/file.h>
diff --git a/fs/ecryptfs/inode.c b/fs/ecryptfs/inode.c
index c9b5b59cbd48..18426f4855f1 100644
--- a/fs/ecryptfs/inode.c
+++ b/fs/ecryptfs/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
@@ -6,21 +7,6 @@
  * Copyright (C) 2004-2007 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
  *              Michael C. Thompsion <mcthomps@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <linux/file.h>
diff --git a/fs/ecryptfs/keystore.c b/fs/ecryptfs/keystore.c
index 770cb8f6f697..216fbe6a4837 100644
--- a/fs/ecryptfs/keystore.c
+++ b/fs/ecryptfs/keystore.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  * In-kernel key management code.  Includes functions to parse and
@@ -8,21 +9,6 @@
  *   Author(s): Michael A. Halcrow <mhalcrow@us.ibm.com>
  *              Michael C. Thompson <mcthomps@us.ibm.com>
  *              Trevor S. Highland <trevor.highland@gmail.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <crypto/hash.h>
@@ -769,7 +755,6 @@ ecryptfs_write_tag_70_packet(char *dest, size_t *remaining_bytes,
 	}
 
 	s->hash_desc->tfm = s->hash_tfm;
-	s->hash_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
 	rc = crypto_shash_digest(s->hash_desc,
 				 (u8 *)s->auth_tok->token.password.session_key_encryption_key,
diff --git a/fs/ecryptfs/kthread.c b/fs/ecryptfs/kthread.c
index e00d45af84ea..a7c903cb01a0 100644
--- a/fs/ecryptfs/kthread.c
+++ b/fs/ecryptfs/kthread.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
  * Copyright (C) 2008 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <linux/kthread.h>
diff --git a/fs/ecryptfs/main.c b/fs/ecryptfs/main.c
index 025d66a705db..b8a7ce379ffe 100644
--- a/fs/ecryptfs/main.c
+++ b/fs/ecryptfs/main.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
@@ -7,21 +8,6 @@
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
  *              Michael C. Thompson <mcthomps@us.ibm.com>
  *              Tyler Hicks <tyhicks@ou.edu>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <linux/dcache.h>
diff --git a/fs/ecryptfs/messaging.c b/fs/ecryptfs/messaging.c
index 9fdd5bcf4564..d668e60b85b5 100644
--- a/fs/ecryptfs/messaging.c
+++ b/fs/ecryptfs/messaging.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
  * Copyright (C) 2004-2008 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mhalcrow@us.ibm.com>
  *		Tyler Hicks <tyhicks@ou.edu>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 #include <linux/sched.h>
 #include <linux/slab.h>
diff --git a/fs/ecryptfs/miscdev.c b/fs/ecryptfs/miscdev.c
index 2d1158e5f950..742ece22c1d4 100644
--- a/fs/ecryptfs/miscdev.c
+++ b/fs/ecryptfs/miscdev.c
@@ -1,22 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
  * Copyright (C) 2008 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mhalcrow@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License version
- * 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ecryptfs/mmap.c b/fs/ecryptfs/mmap.c
index cdf358b209d9..cffa0c1ec829 100644
--- a/fs/ecryptfs/mmap.c
+++ b/fs/ecryptfs/mmap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  * This is where eCryptfs coordinates the symmetric encryption and
@@ -8,21 +9,6 @@
  * Copyright (C) 2001-2003 Stony Brook University
  * Copyright (C) 2004-2007 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <linux/pagemap.h>
diff --git a/fs/ecryptfs/read_write.c b/fs/ecryptfs/read_write.c
index c596e7c03424..0438997ac9d8 100644
--- a/fs/ecryptfs/read_write.c
+++ b/fs/ecryptfs/read_write.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
  * Copyright (C) 2007 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ecryptfs/super.c b/fs/ecryptfs/super.c
index 85411ceb0508..6b1853f1c06a 100644
--- a/fs/ecryptfs/super.c
+++ b/fs/ecryptfs/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * eCryptfs: Linux filesystem encryption layer
  *
@@ -6,21 +7,6 @@
  * Copyright (C) 2004-2006 International Business Machines Corp.
  *   Author(s): Michael A. Halcrow <mahalcro@us.ibm.com>
  *              Michael C. Thompson <mcthomps@us.ibm.com>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as
- * published by the Free Software Foundation; either version 2 of the
- * License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
- * 02111-1307, USA.
  */
 
 #include <linux/fs.h>
@@ -67,9 +53,8 @@ out:
 	return inode;
 }
 
-static void ecryptfs_i_callback(struct rcu_head *head)
+static void ecryptfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	struct ecryptfs_inode_info *inode_info;
 	inode_info = ecryptfs_inode_to_private(inode);
 
@@ -92,7 +77,6 @@ static void ecryptfs_destroy_inode(struct inode *inode)
 	inode_info = ecryptfs_inode_to_private(inode);
 	BUG_ON(inode_info->lower_file);
 	ecryptfs_destroy_crypt_stat(&inode_info->crypt_stat);
-	call_rcu(&inode->i_rcu, ecryptfs_i_callback);
 }
 
 /**
@@ -186,6 +170,7 @@ static int ecryptfs_show_options(struct seq_file *m, struct dentry *root)
 const struct super_operations ecryptfs_sops = {
 	.alloc_inode = ecryptfs_alloc_inode,
 	.destroy_inode = ecryptfs_destroy_inode,
+	.free_inode = ecryptfs_free_inode,
 	.statfs = ecryptfs_statfs,
 	.remount_fs = NULL,
 	.evict_inode = ecryptfs_evict_inode,
diff --git a/fs/efivarfs/Kconfig b/fs/efivarfs/Kconfig
index c2499ef174a2..edec8a19c894 100644
--- a/fs/efivarfs/Kconfig
+++ b/fs/efivarfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config EFIVAR_FS
 	tristate "EFI Variable filesystem"
 	depends on EFI
diff --git a/fs/efivarfs/Makefile b/fs/efivarfs/Makefile
index 955d478177d5..0b1c5e63eb71 100644
--- a/fs/efivarfs/Makefile
+++ b/fs/efivarfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the efivarfs filesystem
 #
diff --git a/fs/efivarfs/file.c b/fs/efivarfs/file.c
index 8e568428c88b..e9e27a271af0 100644
--- a/fs/efivarfs/file.c
+++ b/fs/efivarfs/file.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2012 Red Hat, Inc.
  * Copyright (C) 2012 Jeremy Kerr <jeremy.kerr@canonical.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/efi.h>
@@ -110,16 +107,22 @@ out_free:
 	return size;
 }
 
-static int
-efivarfs_ioc_getxflags(struct file *file, void __user *arg)
+static inline unsigned int efivarfs_getflags(struct inode *inode)
 {
-	struct inode *inode = file->f_mapping->host;
 	unsigned int i_flags;
 	unsigned int flags = 0;
 
 	i_flags = inode->i_flags;
 	if (i_flags & S_IMMUTABLE)
 		flags |= FS_IMMUTABLE_FL;
+	return flags;
+}
+
+static int
+efivarfs_ioc_getxflags(struct file *file, void __user *arg)
+{
+	struct inode *inode = file->f_mapping->host;
+	unsigned int flags = efivarfs_getflags(inode);
 
 	if (copy_to_user(arg, &flags, sizeof(flags)))
 		return -EFAULT;
@@ -132,6 +135,7 @@ efivarfs_ioc_setxflags(struct file *file, void __user *arg)
 	struct inode *inode = file->f_mapping->host;
 	unsigned int flags;
 	unsigned int i_flags = 0;
+	unsigned int oldflags = efivarfs_getflags(inode);
 	int error;
 
 	if (!inode_owner_or_capable(inode))
@@ -143,9 +147,6 @@ efivarfs_ioc_setxflags(struct file *file, void __user *arg)
 	if (flags & ~FS_IMMUTABLE_FL)
 		return -EOPNOTSUPP;
 
-	if (!capable(CAP_LINUX_IMMUTABLE))
-		return -EPERM;
-
 	if (flags & FS_IMMUTABLE_FL)
 		i_flags |= S_IMMUTABLE;
 
@@ -155,12 +156,16 @@ efivarfs_ioc_setxflags(struct file *file, void __user *arg)
 		return error;
 
 	inode_lock(inode);
+
+	error = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+	if (error)
+		goto out;
+
 	inode_set_flags(inode, i_flags, S_IMMUTABLE);
+out:
 	inode_unlock(inode);
-
 	mnt_drop_write_file(file);
-
-	return 0;
+	return error;
 }
 
 static long
diff --git a/fs/efivarfs/inode.c b/fs/efivarfs/inode.c
index 8c6ab6c95727..96c0c86f3fff 100644
--- a/fs/efivarfs/inode.c
+++ b/fs/efivarfs/inode.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2012 Red Hat, Inc.
  * Copyright (C) 2012 Jeremy Kerr <jeremy.kerr@canonical.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/efi.h>
diff --git a/fs/efivarfs/internal.h b/fs/efivarfs/internal.h
index b4505188e799..30ae44cb7453 100644
--- a/fs/efivarfs/internal.h
+++ b/fs/efivarfs/internal.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) 2012 Red Hat, Inc.
  * Copyright (C) 2012 Jeremy Kerr <jeremy.kerr@canonical.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 #ifndef EFIVAR_FS_INTERNAL_H
 #define EFIVAR_FS_INTERNAL_H
diff --git a/fs/efivarfs/super.c b/fs/efivarfs/super.c
index 5b68e4294faa..5bc3c4a4c563 100644
--- a/fs/efivarfs/super.c
+++ b/fs/efivarfs/super.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2012 Red Hat, Inc.
  * Copyright (C) 2012 Jeremy Kerr <jeremy.kerr@canonical.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as
- * published by the Free Software Foundation.
  */
 
 #include <linux/ctype.h>
diff --git a/fs/efs/Kconfig b/fs/efs/Kconfig
index d020e3c30fea..2df1bac8b375 100644
--- a/fs/efs/Kconfig
+++ b/fs/efs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config EFS_FS
 	tristate "EFS file system support (read only)"
 	depends on BLOCK
diff --git a/fs/efs/Makefile b/fs/efs/Makefile
index 963543d46f0d..85e5b88f9471 100644
--- a/fs/efs/Makefile
+++ b/fs/efs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux efs-filesystem routines.
 #
diff --git a/fs/efs/inode.c b/fs/efs/inode.c
index cdf0872382af..89e73a6f0d36 100644
--- a/fs/efs/inode.c
+++ b/fs/efs/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * inode.c
  *
diff --git a/fs/efs/super.c b/fs/efs/super.c
index 6ffb7ba1547a..867fc24dee20 100644
--- a/fs/efs/super.c
+++ b/fs/efs/super.c
@@ -74,17 +74,11 @@ static struct inode *efs_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void efs_i_callback(struct rcu_head *head)
+static void efs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(efs_inode_cachep, INODE_INFO(inode));
 }
 
-static void efs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, efs_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct efs_inode_info *ei = (struct efs_inode_info *) foo;
@@ -122,7 +116,7 @@ static int efs_remount(struct super_block *sb, int *flags, char *data)
 
 static const struct super_operations efs_superblock_operations = {
 	.alloc_inode	= efs_alloc_inode,
-	.destroy_inode	= efs_destroy_inode,
+	.free_inode	= efs_free_inode,
 	.statfs		= efs_statfs,
 	.remount_fs	= efs_remount,
 };
diff --git a/fs/eventfd.c b/fs/eventfd.c
index 08d3bd602f73..8aa0ea8c55e8 100644
--- a/fs/eventfd.c
+++ b/fs/eventfd.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  fs/eventfd.c
  *
@@ -21,6 +22,9 @@
 #include <linux/eventfd.h>
 #include <linux/proc_fs.h>
 #include <linux/seq_file.h>
+#include <linux/idr.h>
+
+static DEFINE_IDA(eventfd_ida);
 
 struct eventfd_ctx {
 	struct kref kref;
@@ -35,6 +39,7 @@ struct eventfd_ctx {
 	 */
 	__u64 count;
 	unsigned int flags;
+	int id;
 };
 
 /**
@@ -69,6 +74,8 @@ EXPORT_SYMBOL_GPL(eventfd_signal);
 
 static void eventfd_free_ctx(struct eventfd_ctx *ctx)
 {
+	if (ctx->id >= 0)
+		ida_simple_remove(&eventfd_ida, ctx->id);
 	kfree(ctx);
 }
 
@@ -297,6 +304,7 @@ static void eventfd_show_fdinfo(struct seq_file *m, struct file *f)
 	seq_printf(m, "eventfd-count: %16llx\n",
 		   (unsigned long long)ctx->count);
 	spin_unlock_irq(&ctx->wqh.lock);
+	seq_printf(m, "eventfd-id: %d\n", ctx->id);
 }
 #endif
 
@@ -400,6 +408,7 @@ static int do_eventfd(unsigned int count, int flags)
 	init_waitqueue_head(&ctx->wqh);
 	ctx->count = count;
 	ctx->flags = flags;
+	ctx->id = ida_simple_get(&eventfd_ida, 0, 0, GFP_KERNEL);
 
 	fd = anon_inode_getfd("[eventfd]", &eventfd_fops, ctx,
 			      O_RDWR | (flags & EFD_SHARED_FCNTL_FLAGS));
diff --git a/fs/eventpoll.c b/fs/eventpoll.c
index a5d219d920e7..4c74c768ae43 100644
--- a/fs/eventpoll.c
+++ b/fs/eventpoll.c
@@ -1,14 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  fs/eventpoll.c (Efficient event retrieval implementation)
  *  Copyright (C) 2001,...,2009	 Davide Libenzi
  *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2 of the License, or
- *  (at your option) any later version.
- *
  *  Davide Libenzi <davidel@xmailserver.org>
- *
  */
 
 #include <linux/init.h>
@@ -50,10 +45,10 @@
  *
  * 1) epmutex (mutex)
  * 2) ep->mtx (mutex)
- * 3) ep->wq.lock (spinlock)
+ * 3) ep->lock (rwlock)
  *
  * The acquire order is the one listed above, from 1 to 3.
- * We need a spinlock (ep->wq.lock) because we manipulate objects
+ * We need a rwlock (ep->lock) because we manipulate objects
  * from inside the poll callback, that might be triggered from
  * a wake_up() that in turn might be called from IRQ context.
  * So we can't sleep inside the poll callback and hence we need
@@ -85,7 +80,7 @@
  * of epoll file descriptors, we use the current recursion depth as
  * the lockdep subkey.
  * It is possible to drop the "ep->mtx" and to use the global
- * mutex "epmutex" (together with "ep->wq.lock") to have it working,
+ * mutex "epmutex" (together with "ep->lock") to have it working,
  * but having "ep->mtx" will make the interface more scalable.
  * Events that require holding "epmutex" are very rare, while for
  * normal operations the epoll private "ep->mtx" will guarantee
@@ -182,8 +177,6 @@ struct epitem {
  * This structure is stored inside the "private_data" member of the file
  * structure and represents the main data structure for the eventpoll
  * interface.
- *
- * Access to it is protected by the lock inside wq.
  */
 struct eventpoll {
 	/*
@@ -203,13 +196,16 @@ struct eventpoll {
 	/* List of ready file descriptors */
 	struct list_head rdllist;
 
+	/* Lock which protects rdllist and ovflist */
+	rwlock_t lock;
+
 	/* RB tree root used to store monitored fd structs */
 	struct rb_root_cached rbr;
 
 	/*
 	 * This is a single linked list that chains all the "struct epitem" that
 	 * happened while transferring ready events to userspace w/out
-	 * holding ->wq.lock.
+	 * holding ->lock.
 	 */
 	struct epitem *ovflist;
 
@@ -697,17 +693,17 @@ static __poll_t ep_scan_ready_list(struct eventpoll *ep,
 	 * because we want the "sproc" callback to be able to do it
 	 * in a lockless way.
 	 */
-	spin_lock_irq(&ep->wq.lock);
+	write_lock_irq(&ep->lock);
 	list_splice_init(&ep->rdllist, &txlist);
 	WRITE_ONCE(ep->ovflist, NULL);
-	spin_unlock_irq(&ep->wq.lock);
+	write_unlock_irq(&ep->lock);
 
 	/*
 	 * Now call the callback function.
 	 */
 	res = (*sproc)(ep, &txlist, priv);
 
-	spin_lock_irq(&ep->wq.lock);
+	write_lock_irq(&ep->lock);
 	/*
 	 * During the time we spent inside the "sproc" callback, some
 	 * other events might have been queued by the poll callback.
@@ -722,7 +718,11 @@ static __poll_t ep_scan_ready_list(struct eventpoll *ep,
 		 * contain them, and the list_splice() below takes care of them.
 		 */
 		if (!ep_is_linked(epi)) {
-			list_add_tail(&epi->rdllink, &ep->rdllist);
+			/*
+			 * ->ovflist is LIFO, so we have to reverse it in order
+			 * to keep in FIFO.
+			 */
+			list_add(&epi->rdllink, &ep->rdllist);
 			ep_pm_stay_awake(epi);
 		}
 	}
@@ -745,11 +745,11 @@ static __poll_t ep_scan_ready_list(struct eventpoll *ep,
 		 * the ->poll() wait list (delayed after we release the lock).
 		 */
 		if (waitqueue_active(&ep->wq))
-			wake_up_locked(&ep->wq);
+			wake_up(&ep->wq);
 		if (waitqueue_active(&ep->poll_wait))
 			pwake++;
 	}
-	spin_unlock_irq(&ep->wq.lock);
+	write_unlock_irq(&ep->lock);
 
 	if (!ep_locked)
 		mutex_unlock(&ep->mtx);
@@ -789,10 +789,10 @@ static int ep_remove(struct eventpoll *ep, struct epitem *epi)
 
 	rb_erase_cached(&epi->rbn, &ep->rbr);
 
-	spin_lock_irq(&ep->wq.lock);
+	write_lock_irq(&ep->lock);
 	if (ep_is_linked(epi))
 		list_del_init(&epi->rdllink);
-	spin_unlock_irq(&ep->wq.lock);
+	write_unlock_irq(&ep->lock);
 
 	wakeup_source_unregister(ep_wakeup_source(epi));
 	/*
@@ -842,7 +842,7 @@ static void ep_free(struct eventpoll *ep)
 	 * Walks through the whole tree by freeing each "struct epitem". At this
 	 * point we are sure no poll callbacks will be lingering around, and also by
 	 * holding "epmutex" we can be sure that no file cleanup code will hit
-	 * us during this operation. So we can avoid the lock on "ep->wq.lock".
+	 * us during this operation. So we can avoid the lock on "ep->lock".
 	 * We do not need to lock ep->mtx, either, we only do it to prevent
 	 * a lockdep warning.
 	 */
@@ -1023,6 +1023,7 @@ static int ep_alloc(struct eventpoll **pep)
 		goto free_uid;
 
 	mutex_init(&ep->mtx);
+	rwlock_init(&ep->lock);
 	init_waitqueue_head(&ep->wq);
 	init_waitqueue_head(&ep->poll_wait);
 	INIT_LIST_HEAD(&ep->rdllist);
@@ -1112,21 +1113,107 @@ struct file *get_epoll_tfile_raw_ptr(struct file *file, int tfd,
 }
 #endif /* CONFIG_CHECKPOINT_RESTORE */
 
+/**
+ * Adds a new entry to the tail of the list in a lockless way, i.e.
+ * multiple CPUs are allowed to call this function concurrently.
+ *
+ * Beware: it is necessary to prevent any other modifications of the
+ *         existing list until all changes are completed, in other words
+ *         concurrent list_add_tail_lockless() calls should be protected
+ *         with a read lock, where write lock acts as a barrier which
+ *         makes sure all list_add_tail_lockless() calls are fully
+ *         completed.
+ *
+ *        Also an element can be locklessly added to the list only in one
+ *        direction i.e. either to the tail either to the head, otherwise
+ *        concurrent access will corrupt the list.
+ *
+ * Returns %false if element has been already added to the list, %true
+ * otherwise.
+ */
+static inline bool list_add_tail_lockless(struct list_head *new,
+					  struct list_head *head)
+{
+	struct list_head *prev;
+
+	/*
+	 * This is simple 'new->next = head' operation, but cmpxchg()
+	 * is used in order to detect that same element has been just
+	 * added to the list from another CPU: the winner observes
+	 * new->next == new.
+	 */
+	if (cmpxchg(&new->next, new, head) != new)
+		return false;
+
+	/*
+	 * Initially ->next of a new element must be updated with the head
+	 * (we are inserting to the tail) and only then pointers are atomically
+	 * exchanged.  XCHG guarantees memory ordering, thus ->next should be
+	 * updated before pointers are actually swapped and pointers are
+	 * swapped before prev->next is updated.
+	 */
+
+	prev = xchg(&head->prev, new);
+
+	/*
+	 * It is safe to modify prev->next and new->prev, because a new element
+	 * is added only to the tail and new->next is updated before XCHG.
+	 */
+
+	prev->next = new;
+	new->prev = prev;
+
+	return true;
+}
+
+/**
+ * Chains a new epi entry to the tail of the ep->ovflist in a lockless way,
+ * i.e. multiple CPUs are allowed to call this function concurrently.
+ *
+ * Returns %false if epi element has been already chained, %true otherwise.
+ */
+static inline bool chain_epi_lockless(struct epitem *epi)
+{
+	struct eventpoll *ep = epi->ep;
+
+	/* Check that the same epi has not been just chained from another CPU */
+	if (cmpxchg(&epi->next, EP_UNACTIVE_PTR, NULL) != EP_UNACTIVE_PTR)
+		return false;
+
+	/* Atomically exchange tail */
+	epi->next = xchg(&ep->ovflist, epi);
+
+	return true;
+}
+
 /*
  * This is the callback that is passed to the wait queue wakeup
  * mechanism. It is called by the stored file descriptors when they
  * have events to report.
+ *
+ * This callback takes a read lock in order not to content with concurrent
+ * events from another file descriptors, thus all modifications to ->rdllist
+ * or ->ovflist are lockless.  Read lock is paired with the write lock from
+ * ep_scan_ready_list(), which stops all list modifications and guarantees
+ * that lists state is seen correctly.
+ *
+ * Another thing worth to mention is that ep_poll_callback() can be called
+ * concurrently for the same @epi from different CPUs if poll table was inited
+ * with several wait queues entries.  Plural wakeup from different CPUs of a
+ * single wait queue is serialized by wq.lock, but the case when multiple wait
+ * queues are used should be detected accordingly.  This is detected using
+ * cmpxchg() operation.
  */
 static int ep_poll_callback(wait_queue_entry_t *wait, unsigned mode, int sync, void *key)
 {
 	int pwake = 0;
-	unsigned long flags;
 	struct epitem *epi = ep_item_from_wait(wait);
 	struct eventpoll *ep = epi->ep;
 	__poll_t pollflags = key_to_poll(key);
+	unsigned long flags;
 	int ewake = 0;
 
-	spin_lock_irqsave(&ep->wq.lock, flags);
+	read_lock_irqsave(&ep->lock, flags);
 
 	ep_set_busy_poll_napi_id(epi);
 
@@ -1155,24 +1242,15 @@ static int ep_poll_callback(wait_queue_entry_t *wait, unsigned mode, int sync, v
 	 * chained in ep->ovflist and requeued later on.
 	 */
 	if (READ_ONCE(ep->ovflist) != EP_UNACTIVE_PTR) {
-		if (epi->next == EP_UNACTIVE_PTR) {
-			epi->next = READ_ONCE(ep->ovflist);
-			WRITE_ONCE(ep->ovflist, epi);
-			if (epi->ws) {
-				/*
-				 * Activate ep->ws since epi->ws may get
-				 * deactivated at any time.
-				 */
-				__pm_stay_awake(ep->ws);
-			}
-
-		}
+		if (epi->next == EP_UNACTIVE_PTR &&
+		    chain_epi_lockless(epi))
+			ep_pm_stay_awake_rcu(epi);
 		goto out_unlock;
 	}
 
 	/* If this file is already in the ready list we exit soon */
-	if (!ep_is_linked(epi)) {
-		list_add_tail(&epi->rdllink, &ep->rdllist);
+	if (!ep_is_linked(epi) &&
+	    list_add_tail_lockless(&epi->rdllink, &ep->rdllist)) {
 		ep_pm_stay_awake_rcu(epi);
 	}
 
@@ -1197,13 +1275,13 @@ static int ep_poll_callback(wait_queue_entry_t *wait, unsigned mode, int sync, v
 				break;
 			}
 		}
-		wake_up_locked(&ep->wq);
+		wake_up(&ep->wq);
 	}
 	if (waitqueue_active(&ep->poll_wait))
 		pwake++;
 
 out_unlock:
-	spin_unlock_irqrestore(&ep->wq.lock, flags);
+	read_unlock_irqrestore(&ep->lock, flags);
 
 	/* We have to call this outside the lock */
 	if (pwake)
@@ -1488,7 +1566,7 @@ static int ep_insert(struct eventpoll *ep, const struct epoll_event *event,
 		goto error_remove_epi;
 
 	/* We have to drop the new item inside our item list to keep track of it */
-	spin_lock_irq(&ep->wq.lock);
+	write_lock_irq(&ep->lock);
 
 	/* record NAPI ID of new item if present */
 	ep_set_busy_poll_napi_id(epi);
@@ -1500,12 +1578,12 @@ static int ep_insert(struct eventpoll *ep, const struct epoll_event *event,
 
 		/* Notify waiting tasks that events are available */
 		if (waitqueue_active(&ep->wq))
-			wake_up_locked(&ep->wq);
+			wake_up(&ep->wq);
 		if (waitqueue_active(&ep->poll_wait))
 			pwake++;
 	}
 
-	spin_unlock_irq(&ep->wq.lock);
+	write_unlock_irq(&ep->lock);
 
 	atomic_long_inc(&ep->user->epoll_watches);
 
@@ -1531,10 +1609,10 @@ error_unregister:
 	 * list, since that is used/cleaned only inside a section bound by "mtx".
 	 * And ep_insert() is called with "mtx" held.
 	 */
-	spin_lock_irq(&ep->wq.lock);
+	write_lock_irq(&ep->lock);
 	if (ep_is_linked(epi))
 		list_del_init(&epi->rdllink);
-	spin_unlock_irq(&ep->wq.lock);
+	write_unlock_irq(&ep->lock);
 
 	wakeup_source_unregister(ep_wakeup_source(epi));
 
@@ -1578,9 +1656,9 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi,
 	 * 1) Flush epi changes above to other CPUs.  This ensures
 	 *    we do not miss events from ep_poll_callback if an
 	 *    event occurs immediately after we call f_op->poll().
-	 *    We need this because we did not take ep->wq.lock while
+	 *    We need this because we did not take ep->lock while
 	 *    changing epi above (but ep_poll_callback does take
-	 *    ep->wq.lock).
+	 *    ep->lock).
 	 *
 	 * 2) We also need to ensure we do not miss _past_ events
 	 *    when calling f_op->poll().  This barrier also
@@ -1599,18 +1677,18 @@ static int ep_modify(struct eventpoll *ep, struct epitem *epi,
 	 * list, push it inside.
 	 */
 	if (ep_item_poll(epi, &pt, 1)) {
-		spin_lock_irq(&ep->wq.lock);
+		write_lock_irq(&ep->lock);
 		if (!ep_is_linked(epi)) {
 			list_add_tail(&epi->rdllink, &ep->rdllist);
 			ep_pm_stay_awake(epi);
 
 			/* Notify waiting tasks that events are available */
 			if (waitqueue_active(&ep->wq))
-				wake_up_locked(&ep->wq);
+				wake_up(&ep->wq);
 			if (waitqueue_active(&ep->poll_wait))
 				pwake++;
 		}
-		spin_unlock_irq(&ep->wq.lock);
+		write_unlock_irq(&ep->lock);
 	}
 
 	/* We have to call this outside the lock */
@@ -1771,9 +1849,9 @@ static int ep_poll(struct eventpoll *ep, struct epoll_event __user *events,
 		 */
 		timed_out = 1;
 
-		spin_lock_irq(&ep->wq.lock);
+		write_lock_irq(&ep->lock);
 		eavail = ep_events_available(ep);
-		spin_unlock_irq(&ep->wq.lock);
+		write_unlock_irq(&ep->lock);
 
 		goto send_events;
 	}
@@ -2247,7 +2325,7 @@ SYSCALL_DEFINE6(epoll_pwait, int, epfd, struct epoll_event __user *, events,
 
 	error = do_epoll_wait(epfd, events, maxevents, timeout);
 
-	restore_user_sigmask(sigmask, &sigsaved);
+	restore_user_sigmask(sigmask, &sigsaved, error == -EINTR);
 
 	return error;
 }
@@ -2272,7 +2350,7 @@ COMPAT_SYSCALL_DEFINE6(epoll_pwait, int, epfd,
 
 	err = do_epoll_wait(epfd, events, maxevents, timeout);
 
-	restore_user_sigmask(sigmask, &sigsaved);
+	restore_user_sigmask(sigmask, &sigsaved, err == -EINTR);
 
 	return err;
 }
diff --git a/fs/exec.c b/fs/exec.c
index fb72d36f7823..c71cbfe6826a 100644
--- a/fs/exec.c
+++ b/fs/exec.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/exec.c
  *
@@ -932,7 +933,7 @@ int kernel_read_file(struct file *file, void **buf, loff_t *size,
 		bytes = kernel_read(file, *buf + pos, i_size - pos, &pos);
 		if (bytes < 0) {
 			ret = bytes;
-			goto out;
+			goto out_free;
 		}
 
 		if (bytes == 0)
@@ -1189,7 +1190,7 @@ no_thread_group:
 	flush_itimer_signals();
 #endif
 
-	if (atomic_read(&oldsighand->count) != 1) {
+	if (refcount_read(&oldsighand->count) != 1) {
 		struct sighand_struct *newsighand;
 		/*
 		 * This ->sighand is shared with the CLONE_SIGHAND
@@ -1199,7 +1200,7 @@ no_thread_group:
 		if (!newsighand)
 			return -ENOMEM;
 
-		atomic_set(&newsighand->count, 1);
+		refcount_set(&newsighand->count, 1);
 		memcpy(newsighand->action, oldsighand->action,
 		       sizeof(newsighand->action));
 
@@ -1563,7 +1564,7 @@ static void bprm_fill_uid(struct linux_binprm *bprm)
 
 /*
  * Fill the binprm structure from the inode.
- * Check permissions, then read the first 128 (BINPRM_BUF_SIZE) bytes
+ * Check permissions, then read the first BINPRM_BUF_SIZE bytes
  *
  * This may be called multiple times for binary chains (scripts for example).
  */
@@ -1652,15 +1653,17 @@ int search_binary_handler(struct linux_binprm *bprm)
 		if (!try_module_get(fmt->module))
 			continue;
 		read_unlock(&binfmt_lock);
+
 		bprm->recursion_depth++;
 		retval = fmt->load_binary(bprm);
+		bprm->recursion_depth--;
+
 		read_lock(&binfmt_lock);
 		put_binfmt(fmt);
-		bprm->recursion_depth--;
 		if (retval < 0 && !bprm->mm) {
 			/* we got to flush_old_exec() and failed after it */
 			read_unlock(&binfmt_lock);
-			force_sigsegv(SIGSEGV, current);
+			force_sigsegv(SIGSEGV);
 			return retval;
 		}
 		if (retval != -ENOEXEC || !bprm->file) {
@@ -1944,15 +1947,10 @@ EXPORT_SYMBOL(set_binfmt);
  */
 void set_dumpable(struct mm_struct *mm, int value)
 {
-	unsigned long old, new;
-
 	if (WARN_ON((unsigned)value > SUID_DUMP_ROOT))
 		return;
 
-	do {
-		old = READ_ONCE(mm->flags);
-		new = (old & ~MMF_DUMPABLE_MASK) | value;
-	} while (cmpxchg(&mm->flags, old, new) != old);
+	set_mask_bits(&mm->flags, MMF_DUMPABLE_MASK, value);
 }
 
 SYSCALL_DEFINE3(execve,
diff --git a/fs/exofs/BUGS b/fs/exofs/BUGS
deleted file mode 100644
index 1b2d4c63a579..000000000000
--- a/fs/exofs/BUGS
+++ /dev/null
@@ -1,3 +0,0 @@
-- Out-of-space may cause a severe problem if the object (and directory entry)
-  were written, but the inode attributes failed. Then if the filesystem was
-  unmounted and mounted the kernel can get into an endless loop doing a readdir.
diff --git a/fs/exofs/Kbuild b/fs/exofs/Kbuild
deleted file mode 100644
index a364fd0965ec..000000000000
--- a/fs/exofs/Kbuild
+++ /dev/null
@@ -1,20 +0,0 @@
-#
-# Kbuild for the EXOFS module
-#
-# Copyright (C) 2008 Panasas Inc.  All rights reserved.
-#
-# Authors:
-#   Boaz Harrosh <ooo@electrozaur.com>
-#
-# This program is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License version 2
-#
-# Kbuild - Gets included from the Kernels Makefile and build system
-#
-
-# ore module library
-libore-y := ore.o ore_raid.o
-obj-$(CONFIG_ORE) += libore.o
-
-exofs-y := inode.o file.o namei.o dir.o super.o sys.o
-obj-$(CONFIG_EXOFS_FS) += exofs.o
diff --git a/fs/exofs/Kconfig b/fs/exofs/Kconfig
deleted file mode 100644
index 86194b2f799d..000000000000
--- a/fs/exofs/Kconfig
+++ /dev/null
@@ -1,13 +0,0 @@
-config EXOFS_FS
-	tristate "exofs: OSD based file system support"
-	depends on SCSI_OSD_ULD
-	help
-	  EXOFS is a file system that uses an OSD storage device,
-	  as its backing storage.
-
-# Debugging-related stuff
-config EXOFS_DEBUG
-	bool "Enable debugging"
-	depends on EXOFS_FS
-	help
-	  This option enables EXOFS debug prints.
diff --git a/fs/exofs/Kconfig.ore b/fs/exofs/Kconfig.ore
deleted file mode 100644
index 2daf2329c28d..000000000000
--- a/fs/exofs/Kconfig.ore
+++ /dev/null
@@ -1,14 +0,0 @@
-# ORE - Objects Raid Engine (libore.ko)
-#
-# Note ORE needs to "select ASYNC_XOR". So Not to force multiple selects
-# for every ORE user we do it like this. Any user should add itself here
-# at the "depends on EXOFS_FS || ..." with an ||. The dependencies are
-# selected here, and we default to "ON". So in effect it is like been
-# selected by any of the users.
-config ORE
-	tristate
-	depends on EXOFS_FS || PNFS_OBJLAYOUT
-	select ASYNC_XOR
-	select RAID6_PQ
-	select ASYNC_PQ
-	default SCSI_OSD_ULD
diff --git a/fs/exofs/common.h b/fs/exofs/common.h
deleted file mode 100644
index 7d88ef566213..000000000000
--- a/fs/exofs/common.h
+++ /dev/null
@@ -1,262 +0,0 @@
-/*
- * common.h - Common definitions for both Kernel and user-mode utilities
- *
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- *     Copyright (C) 1992, 1993, 1994, 1995
- *     Remy Card (card@masi.ibp.fr)
- *     Laboratoire MASI - Institut Blaise Pascal
- *     Universite Pierre et Marie Curie (Paris VI)
- *     from
- *     linux/fs/minix/inode.c
- *     Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#ifndef __EXOFS_COM_H__
-#define __EXOFS_COM_H__
-
-#include <linux/types.h>
-
-#include <scsi/osd_attributes.h>
-#include <scsi/osd_initiator.h>
-#include <scsi/osd_sec.h>
-
-/****************************************************************************
- * Object ID related defines
- * NOTE: inode# = object ID - EXOFS_OBJ_OFF
- ****************************************************************************/
-#define EXOFS_MIN_PID   0x10000	/* Smallest partition ID */
-#define EXOFS_OBJ_OFF	0x10000	/* offset for objects */
-#define EXOFS_SUPER_ID	0x10000	/* object ID for on-disk superblock */
-#define EXOFS_DEVTABLE_ID 0x10001 /* object ID for on-disk device table */
-#define EXOFS_ROOT_ID	0x10002	/* object ID for root directory */
-
-/* exofs Application specific page/attribute */
-/* Inode attrs */
-# define EXOFS_APAGE_FS_DATA	(OSD_APAGE_APP_DEFINED_FIRST + 3)
-# define EXOFS_ATTR_INODE_DATA	1
-# define EXOFS_ATTR_INODE_FILE_LAYOUT	2
-# define EXOFS_ATTR_INODE_DIR_LAYOUT	3
-/* Partition attrs */
-# define EXOFS_APAGE_SB_DATA	(0xF0000000U + 3)
-# define EXOFS_ATTR_SB_STATS	1
-
-/*
- * The maximum number of files we can have is limited by the size of the
- * inode number.  This is the largest object ID that the file system supports.
- * Object IDs 0, 1, and 2 are always in use (see above defines).
- */
-enum {
-	EXOFS_MAX_INO_ID = (sizeof(ino_t) * 8 == 64) ? ULLONG_MAX :
-					(1ULL << (sizeof(ino_t) * 8ULL - 1ULL)),
-	EXOFS_MAX_ID	 = (EXOFS_MAX_INO_ID - 1 - EXOFS_OBJ_OFF),
-};
-
-/****************************************************************************
- * Misc.
- ****************************************************************************/
-#define EXOFS_BLKSHIFT	12
-#define EXOFS_BLKSIZE	(1UL << EXOFS_BLKSHIFT)
-
-/****************************************************************************
- * superblock-related things
- ****************************************************************************/
-#define EXOFS_SUPER_MAGIC	0x5DF5
-
-/*
- * The file system control block - stored in object EXOFS_SUPER_ID's data.
- * This is where the in-memory superblock is stored on disk.
- */
-enum {EXOFS_FSCB_VER = 1, EXOFS_DT_VER = 1};
-struct exofs_fscb {
-	__le64  s_nextid;	/* Only used after mkfs */
-	__le64  s_numfiles;	/* Only used after mkfs */
-	__le32	s_version;	/* == EXOFS_FSCB_VER */
-	__le16  s_magic;	/* Magic signature */
-	__le16  s_newfs;	/* Non-zero if this is a new fs */
-
-	/* From here on it's a static part, only written by mkexofs */
-	__le64	s_dev_table_oid;   /* Resurved, not used */
-	__le64	s_dev_table_count; /* == 0 means no dev_table */
-} __packed;
-
-/*
- * This struct is set on the FS partition's attributes.
- * [EXOFS_APAGE_SB_DATA, EXOFS_ATTR_SB_STATS] and is written together
- * with the create command, to atomically persist the sb writeable information.
- */
-struct exofs_sb_stats {
-	__le64  s_nextid;	/* Highest object ID used */
-	__le64  s_numfiles;	/* Number of files on fs */
-} __packed;
-
-/*
- * Describes the raid used in the FS. It is part of the device table.
- * This here is taken from the pNFS-objects definition. In exofs we
- * use one raid policy through-out the filesystem. (NOTE: the funny
- * alignment at beginning. We take care of it at exofs_device_table.
- */
-struct exofs_dt_data_map {
-	__le32	cb_num_comps;
-	__le64	cb_stripe_unit;
-	__le32	cb_group_width;
-	__le32	cb_group_depth;
-	__le32	cb_mirror_cnt;
-	__le32	cb_raid_algorithm;
-} __packed;
-
-/*
- * This is an osd device information descriptor. It is a single entry in
- * the exofs device table. It describes an osd target lun which
- * contains data belonging to this FS. (Same partition_id on all devices)
- */
-struct exofs_dt_device_info {
-	__le32	systemid_len;
-	u8	systemid[OSD_SYSTEMID_LEN];
-	__le64	long_name_offset;	/* If !0 then offset-in-file */
-	__le32	osdname_len;		/* */
-	u8	osdname[44];		/* Embbeded, Usually an asci uuid */
-} __packed;
-
-/*
- * The EXOFS device table - stored in object EXOFS_DEVTABLE_ID's data.
- * It contains the raid used for this multy-device FS and an array of
- * participating devices.
- */
-struct exofs_device_table {
-	__le32				dt_version;	/* == EXOFS_DT_VER */
-	struct exofs_dt_data_map	dt_data_map;	/* Raid policy to use */
-
-	/* Resurved space For future use. Total includeing this:
-	 * (8 * sizeof(le64))
-	 */
-	__le64				__Resurved[4];
-
-	__le64				dt_num_devices;	/* Array size */
-	struct exofs_dt_device_info	dt_dev_table[];	/* Array of devices */
-} __packed;
-
-/****************************************************************************
- * inode-related things
- ****************************************************************************/
-#define EXOFS_IDATA		5
-
-/*
- * The file control block - stored in an object's attributes.  This is where
- * the in-memory inode is stored on disk.
- */
-struct exofs_fcb {
-	__le64  i_size;			/* Size of the file */
-	__le16  i_mode;         	/* File mode */
-	__le16  i_links_count;  	/* Links count */
-	__le32  i_uid;          	/* Owner Uid */
-	__le32  i_gid;          	/* Group Id */
-	__le32  i_atime;        	/* Access time */
-	__le32  i_ctime;        	/* Creation time */
-	__le32  i_mtime;        	/* Modification time */
-	__le32  i_flags;        	/* File flags (unused for now)*/
-	__le32  i_generation;   	/* File version (for NFS) */
-	__le32  i_data[EXOFS_IDATA];	/* Short symlink names and device #s */
-};
-
-#define EXOFS_INO_ATTR_SIZE	sizeof(struct exofs_fcb)
-
-/* This is the Attribute the fcb is stored in */
-static const struct __weak osd_attr g_attr_inode_data = ATTR_DEF(
-	EXOFS_APAGE_FS_DATA,
-	EXOFS_ATTR_INODE_DATA,
-	EXOFS_INO_ATTR_SIZE);
-
-/****************************************************************************
- * dentry-related things
- ****************************************************************************/
-#define EXOFS_NAME_LEN	255
-
-/*
- * The on-disk directory entry
- */
-struct exofs_dir_entry {
-	__le64		inode_no;		/* inode number           */
-	__le16		rec_len;		/* directory entry length */
-	u8		name_len;		/* name length            */
-	u8		file_type;		/* umm...file type        */
-	char		name[EXOFS_NAME_LEN];	/* file name              */
-};
-
-enum {
-	EXOFS_FT_UNKNOWN,
-	EXOFS_FT_REG_FILE,
-	EXOFS_FT_DIR,
-	EXOFS_FT_CHRDEV,
-	EXOFS_FT_BLKDEV,
-	EXOFS_FT_FIFO,
-	EXOFS_FT_SOCK,
-	EXOFS_FT_SYMLINK,
-	EXOFS_FT_MAX
-};
-
-#define EXOFS_DIR_PAD			4
-#define EXOFS_DIR_ROUND			(EXOFS_DIR_PAD - 1)
-#define EXOFS_DIR_REC_LEN(name_len) \
-	(((name_len) + offsetof(struct exofs_dir_entry, name)  + \
-	  EXOFS_DIR_ROUND) & ~EXOFS_DIR_ROUND)
-
-/*
- * The on-disk (optional) layout structure.
- * sits in an EXOFS_ATTR_INODE_FILE_LAYOUT or EXOFS_ATTR_INODE_DIR_LAYOUT
- * attribute, attached to any inode, usually to a directory.
- */
-
-enum exofs_inode_layout_gen_functions {
-	LAYOUT_MOVING_WINDOW = 0,
-	LAYOUT_IMPLICT = 1,
-};
-
-struct exofs_on_disk_inode_layout {
-	__le16 gen_func; /* One of enum exofs_inode_layout_gen_functions */
-	__le16 pad;
-	union {
-		/* gen_func == LAYOUT_MOVING_WINDOW (default) */
-		struct exofs_layout_sliding_window {
-			__le32 num_devices; /* first n devices in global-table*/
-		} sliding_window __packed;
-
-		/* gen_func == LAYOUT_IMPLICT */
-		struct exofs_layout_implict_list {
-			struct exofs_dt_data_map data_map;
-			/* Variable array of size data_map.cb_num_comps. These
-			 * are device indexes of the devices in the global table
-			 */
-			__le32 dev_indexes[];
-		} implict __packed;
-	};
-} __packed;
-
-static inline size_t exofs_on_disk_inode_layout_size(unsigned max_devs)
-{
-	return sizeof(struct exofs_on_disk_inode_layout) +
-		max_devs * sizeof(__le32);
-}
-
-#endif /*ifndef __EXOFS_COM_H__*/
diff --git a/fs/exofs/dir.c b/fs/exofs/dir.c
deleted file mode 100644
index f0138674c1ed..000000000000
--- a/fs/exofs/dir.c
+++ /dev/null
@@ -1,661 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- *     Copyright (C) 1992, 1993, 1994, 1995
- *     Remy Card (card@masi.ibp.fr)
- *     Laboratoire MASI - Institut Blaise Pascal
- *     Universite Pierre et Marie Curie (Paris VI)
- *     from
- *     linux/fs/minix/inode.c
- *     Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/iversion.h>
-#include "exofs.h"
-
-static inline unsigned exofs_chunk_size(struct inode *inode)
-{
-	return inode->i_sb->s_blocksize;
-}
-
-static inline void exofs_put_page(struct page *page)
-{
-	kunmap(page);
-	put_page(page);
-}
-
-static unsigned exofs_last_byte(struct inode *inode, unsigned long page_nr)
-{
-	loff_t last_byte = inode->i_size;
-
-	last_byte -= page_nr << PAGE_SHIFT;
-	if (last_byte > PAGE_SIZE)
-		last_byte = PAGE_SIZE;
-	return last_byte;
-}
-
-static int exofs_commit_chunk(struct page *page, loff_t pos, unsigned len)
-{
-	struct address_space *mapping = page->mapping;
-	struct inode *dir = mapping->host;
-	int err = 0;
-
-	inode_inc_iversion(dir);
-
-	if (!PageUptodate(page))
-		SetPageUptodate(page);
-
-	if (pos+len > dir->i_size) {
-		i_size_write(dir, pos+len);
-		mark_inode_dirty(dir);
-	}
-	set_page_dirty(page);
-
-	if (IS_DIRSYNC(dir))
-		err = write_one_page(page);
-	else
-		unlock_page(page);
-
-	return err;
-}
-
-static bool exofs_check_page(struct page *page)
-{
-	struct inode *dir = page->mapping->host;
-	unsigned chunk_size = exofs_chunk_size(dir);
-	char *kaddr = page_address(page);
-	unsigned offs, rec_len;
-	unsigned limit = PAGE_SIZE;
-	struct exofs_dir_entry *p;
-	char *error;
-
-	/* if the page is the last one in the directory */
-	if ((dir->i_size >> PAGE_SHIFT) == page->index) {
-		limit = dir->i_size & ~PAGE_MASK;
-		if (limit & (chunk_size - 1))
-			goto Ebadsize;
-		if (!limit)
-			goto out;
-	}
-	for (offs = 0; offs <= limit - EXOFS_DIR_REC_LEN(1); offs += rec_len) {
-		p = (struct exofs_dir_entry *)(kaddr + offs);
-		rec_len = le16_to_cpu(p->rec_len);
-
-		if (rec_len < EXOFS_DIR_REC_LEN(1))
-			goto Eshort;
-		if (rec_len & 3)
-			goto Ealign;
-		if (rec_len < EXOFS_DIR_REC_LEN(p->name_len))
-			goto Enamelen;
-		if (((offs + rec_len - 1) ^ offs) & ~(chunk_size-1))
-			goto Espan;
-	}
-	if (offs != limit)
-		goto Eend;
-out:
-	SetPageChecked(page);
-	return true;
-
-Ebadsize:
-	EXOFS_ERR("ERROR [exofs_check_page]: "
-		"size of directory(0x%lx) is not a multiple of chunk size\n",
-		dir->i_ino
-	);
-	goto fail;
-Eshort:
-	error = "rec_len is smaller than minimal";
-	goto bad_entry;
-Ealign:
-	error = "unaligned directory entry";
-	goto bad_entry;
-Enamelen:
-	error = "rec_len is too small for name_len";
-	goto bad_entry;
-Espan:
-	error = "directory entry across blocks";
-	goto bad_entry;
-bad_entry:
-	EXOFS_ERR(
-		"ERROR [exofs_check_page]: bad entry in directory(0x%lx): %s - "
-		"offset=%lu, inode=0x%llx, rec_len=%d, name_len=%d\n",
-		dir->i_ino, error, (page->index<<PAGE_SHIFT)+offs,
-		_LLU(le64_to_cpu(p->inode_no)),
-		rec_len, p->name_len);
-	goto fail;
-Eend:
-	p = (struct exofs_dir_entry *)(kaddr + offs);
-	EXOFS_ERR("ERROR [exofs_check_page]: "
-		"entry in directory(0x%lx) spans the page boundary"
-		"offset=%lu, inode=0x%llx\n",
-		dir->i_ino, (page->index<<PAGE_SHIFT)+offs,
-		_LLU(le64_to_cpu(p->inode_no)));
-fail:
-	SetPageError(page);
-	return false;
-}
-
-static struct page *exofs_get_page(struct inode *dir, unsigned long n)
-{
-	struct address_space *mapping = dir->i_mapping;
-	struct page *page = read_mapping_page(mapping, n, NULL);
-
-	if (!IS_ERR(page)) {
-		kmap(page);
-		if (unlikely(!PageChecked(page))) {
-			if (PageError(page) || !exofs_check_page(page))
-				goto fail;
-		}
-	}
-	return page;
-
-fail:
-	exofs_put_page(page);
-	return ERR_PTR(-EIO);
-}
-
-static inline int exofs_match(int len, const unsigned char *name,
-					struct exofs_dir_entry *de)
-{
-	if (len != de->name_len)
-		return 0;
-	if (!de->inode_no)
-		return 0;
-	return !memcmp(name, de->name, len);
-}
-
-static inline
-struct exofs_dir_entry *exofs_next_entry(struct exofs_dir_entry *p)
-{
-	return (struct exofs_dir_entry *)((char *)p + le16_to_cpu(p->rec_len));
-}
-
-static inline unsigned
-exofs_validate_entry(char *base, unsigned offset, unsigned mask)
-{
-	struct exofs_dir_entry *de = (struct exofs_dir_entry *)(base + offset);
-	struct exofs_dir_entry *p =
-			(struct exofs_dir_entry *)(base + (offset&mask));
-	while ((char *)p < (char *)de) {
-		if (p->rec_len == 0)
-			break;
-		p = exofs_next_entry(p);
-	}
-	return (char *)p - base;
-}
-
-static unsigned char exofs_filetype_table[EXOFS_FT_MAX] = {
-	[EXOFS_FT_UNKNOWN]	= DT_UNKNOWN,
-	[EXOFS_FT_REG_FILE]	= DT_REG,
-	[EXOFS_FT_DIR]		= DT_DIR,
-	[EXOFS_FT_CHRDEV]	= DT_CHR,
-	[EXOFS_FT_BLKDEV]	= DT_BLK,
-	[EXOFS_FT_FIFO]		= DT_FIFO,
-	[EXOFS_FT_SOCK]		= DT_SOCK,
-	[EXOFS_FT_SYMLINK]	= DT_LNK,
-};
-
-#define S_SHIFT 12
-static unsigned char exofs_type_by_mode[S_IFMT >> S_SHIFT] = {
-	[S_IFREG >> S_SHIFT]	= EXOFS_FT_REG_FILE,
-	[S_IFDIR >> S_SHIFT]	= EXOFS_FT_DIR,
-	[S_IFCHR >> S_SHIFT]	= EXOFS_FT_CHRDEV,
-	[S_IFBLK >> S_SHIFT]	= EXOFS_FT_BLKDEV,
-	[S_IFIFO >> S_SHIFT]	= EXOFS_FT_FIFO,
-	[S_IFSOCK >> S_SHIFT]	= EXOFS_FT_SOCK,
-	[S_IFLNK >> S_SHIFT]	= EXOFS_FT_SYMLINK,
-};
-
-static inline
-void exofs_set_de_type(struct exofs_dir_entry *de, struct inode *inode)
-{
-	umode_t mode = inode->i_mode;
-	de->file_type = exofs_type_by_mode[(mode & S_IFMT) >> S_SHIFT];
-}
-
-static int
-exofs_readdir(struct file *file, struct dir_context *ctx)
-{
-	loff_t pos = ctx->pos;
-	struct inode *inode = file_inode(file);
-	unsigned int offset = pos & ~PAGE_MASK;
-	unsigned long n = pos >> PAGE_SHIFT;
-	unsigned long npages = dir_pages(inode);
-	unsigned chunk_mask = ~(exofs_chunk_size(inode)-1);
-	bool need_revalidate = !inode_eq_iversion(inode, file->f_version);
-
-	if (pos > inode->i_size - EXOFS_DIR_REC_LEN(1))
-		return 0;
-
-	for ( ; n < npages; n++, offset = 0) {
-		char *kaddr, *limit;
-		struct exofs_dir_entry *de;
-		struct page *page = exofs_get_page(inode, n);
-
-		if (IS_ERR(page)) {
-			EXOFS_ERR("ERROR: bad page in directory(0x%lx)\n",
-				  inode->i_ino);
-			ctx->pos += PAGE_SIZE - offset;
-			return PTR_ERR(page);
-		}
-		kaddr = page_address(page);
-		if (unlikely(need_revalidate)) {
-			if (offset) {
-				offset = exofs_validate_entry(kaddr, offset,
-								chunk_mask);
-				ctx->pos = (n<<PAGE_SHIFT) + offset;
-			}
-			file->f_version = inode_query_iversion(inode);
-			need_revalidate = false;
-		}
-		de = (struct exofs_dir_entry *)(kaddr + offset);
-		limit = kaddr + exofs_last_byte(inode, n) -
-							EXOFS_DIR_REC_LEN(1);
-		for (; (char *)de <= limit; de = exofs_next_entry(de)) {
-			if (de->rec_len == 0) {
-				EXOFS_ERR("ERROR: "
-				     "zero-length entry in directory(0x%lx)\n",
-				     inode->i_ino);
-				exofs_put_page(page);
-				return -EIO;
-			}
-			if (de->inode_no) {
-				unsigned char t;
-
-				if (de->file_type < EXOFS_FT_MAX)
-					t = exofs_filetype_table[de->file_type];
-				else
-					t = DT_UNKNOWN;
-
-				if (!dir_emit(ctx, de->name, de->name_len,
-						le64_to_cpu(de->inode_no),
-						t)) {
-					exofs_put_page(page);
-					return 0;
-				}
-			}
-			ctx->pos += le16_to_cpu(de->rec_len);
-		}
-		exofs_put_page(page);
-	}
-	return 0;
-}
-
-struct exofs_dir_entry *exofs_find_entry(struct inode *dir,
-			struct dentry *dentry, struct page **res_page)
-{
-	const unsigned char *name = dentry->d_name.name;
-	int namelen = dentry->d_name.len;
-	unsigned reclen = EXOFS_DIR_REC_LEN(namelen);
-	unsigned long start, n;
-	unsigned long npages = dir_pages(dir);
-	struct page *page = NULL;
-	struct exofs_i_info *oi = exofs_i(dir);
-	struct exofs_dir_entry *de;
-
-	if (npages == 0)
-		goto out;
-
-	*res_page = NULL;
-
-	start = oi->i_dir_start_lookup;
-	if (start >= npages)
-		start = 0;
-	n = start;
-	do {
-		char *kaddr;
-		page = exofs_get_page(dir, n);
-		if (!IS_ERR(page)) {
-			kaddr = page_address(page);
-			de = (struct exofs_dir_entry *) kaddr;
-			kaddr += exofs_last_byte(dir, n) - reclen;
-			while ((char *) de <= kaddr) {
-				if (de->rec_len == 0) {
-					EXOFS_ERR("ERROR: zero-length entry in "
-						  "directory(0x%lx)\n",
-						  dir->i_ino);
-					exofs_put_page(page);
-					goto out;
-				}
-				if (exofs_match(namelen, name, de))
-					goto found;
-				de = exofs_next_entry(de);
-			}
-			exofs_put_page(page);
-		}
-		if (++n >= npages)
-			n = 0;
-	} while (n != start);
-out:
-	return NULL;
-
-found:
-	*res_page = page;
-	oi->i_dir_start_lookup = n;
-	return de;
-}
-
-struct exofs_dir_entry *exofs_dotdot(struct inode *dir, struct page **p)
-{
-	struct page *page = exofs_get_page(dir, 0);
-	struct exofs_dir_entry *de = NULL;
-
-	if (!IS_ERR(page)) {
-		de = exofs_next_entry(
-				(struct exofs_dir_entry *)page_address(page));
-		*p = page;
-	}
-	return de;
-}
-
-ino_t exofs_parent_ino(struct dentry *child)
-{
-	struct page *page;
-	struct exofs_dir_entry *de;
-	ino_t ino;
-
-	de = exofs_dotdot(d_inode(child), &page);
-	if (!de)
-		return 0;
-
-	ino = le64_to_cpu(de->inode_no);
-	exofs_put_page(page);
-	return ino;
-}
-
-ino_t exofs_inode_by_name(struct inode *dir, struct dentry *dentry)
-{
-	ino_t res = 0;
-	struct exofs_dir_entry *de;
-	struct page *page;
-
-	de = exofs_find_entry(dir, dentry, &page);
-	if (de) {
-		res = le64_to_cpu(de->inode_no);
-		exofs_put_page(page);
-	}
-	return res;
-}
-
-int exofs_set_link(struct inode *dir, struct exofs_dir_entry *de,
-			struct page *page, struct inode *inode)
-{
-	loff_t pos = page_offset(page) +
-			(char *) de - (char *) page_address(page);
-	unsigned len = le16_to_cpu(de->rec_len);
-	int err;
-
-	lock_page(page);
-	err = exofs_write_begin(NULL, page->mapping, pos, len, 0, &page, NULL);
-	if (err)
-		EXOFS_ERR("exofs_set_link: exofs_write_begin FAILED => %d\n",
-			  err);
-
-	de->inode_no = cpu_to_le64(inode->i_ino);
-	exofs_set_de_type(de, inode);
-	if (likely(!err))
-		err = exofs_commit_chunk(page, pos, len);
-	exofs_put_page(page);
-	dir->i_mtime = dir->i_ctime = current_time(dir);
-	mark_inode_dirty(dir);
-	return err;
-}
-
-int exofs_add_link(struct dentry *dentry, struct inode *inode)
-{
-	struct inode *dir = d_inode(dentry->d_parent);
-	const unsigned char *name = dentry->d_name.name;
-	int namelen = dentry->d_name.len;
-	unsigned chunk_size = exofs_chunk_size(dir);
-	unsigned reclen = EXOFS_DIR_REC_LEN(namelen);
-	unsigned short rec_len, name_len;
-	struct page *page = NULL;
-	struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
-	struct exofs_dir_entry *de;
-	unsigned long npages = dir_pages(dir);
-	unsigned long n;
-	char *kaddr;
-	loff_t pos;
-	int err;
-
-	for (n = 0; n <= npages; n++) {
-		char *dir_end;
-
-		page = exofs_get_page(dir, n);
-		err = PTR_ERR(page);
-		if (IS_ERR(page))
-			goto out;
-		lock_page(page);
-		kaddr = page_address(page);
-		dir_end = kaddr + exofs_last_byte(dir, n);
-		de = (struct exofs_dir_entry *)kaddr;
-		kaddr += PAGE_SIZE - reclen;
-		while ((char *)de <= kaddr) {
-			if ((char *)de == dir_end) {
-				name_len = 0;
-				rec_len = chunk_size;
-				de->rec_len = cpu_to_le16(chunk_size);
-				de->inode_no = 0;
-				goto got_it;
-			}
-			if (de->rec_len == 0) {
-				EXOFS_ERR("ERROR: exofs_add_link: "
-				      "zero-length entry in directory(0x%lx)\n",
-				      inode->i_ino);
-				err = -EIO;
-				goto out_unlock;
-			}
-			err = -EEXIST;
-			if (exofs_match(namelen, name, de))
-				goto out_unlock;
-			name_len = EXOFS_DIR_REC_LEN(de->name_len);
-			rec_len = le16_to_cpu(de->rec_len);
-			if (!de->inode_no && rec_len >= reclen)
-				goto got_it;
-			if (rec_len >= name_len + reclen)
-				goto got_it;
-			de = (struct exofs_dir_entry *) ((char *) de + rec_len);
-		}
-		unlock_page(page);
-		exofs_put_page(page);
-	}
-
-	EXOFS_ERR("exofs_add_link: BAD dentry=%p or inode=0x%lx\n",
-		  dentry, inode->i_ino);
-	return -EINVAL;
-
-got_it:
-	pos = page_offset(page) +
-		(char *)de - (char *)page_address(page);
-	err = exofs_write_begin(NULL, page->mapping, pos, rec_len, 0,
-							&page, NULL);
-	if (err)
-		goto out_unlock;
-	if (de->inode_no) {
-		struct exofs_dir_entry *de1 =
-			(struct exofs_dir_entry *)((char *)de + name_len);
-		de1->rec_len = cpu_to_le16(rec_len - name_len);
-		de->rec_len = cpu_to_le16(name_len);
-		de = de1;
-	}
-	de->name_len = namelen;
-	memcpy(de->name, name, namelen);
-	de->inode_no = cpu_to_le64(inode->i_ino);
-	exofs_set_de_type(de, inode);
-	err = exofs_commit_chunk(page, pos, rec_len);
-	dir->i_mtime = dir->i_ctime = current_time(dir);
-	mark_inode_dirty(dir);
-	sbi->s_numfiles++;
-
-out_put:
-	exofs_put_page(page);
-out:
-	return err;
-out_unlock:
-	unlock_page(page);
-	goto out_put;
-}
-
-int exofs_delete_entry(struct exofs_dir_entry *dir, struct page *page)
-{
-	struct address_space *mapping = page->mapping;
-	struct inode *inode = mapping->host;
-	struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
-	char *kaddr = page_address(page);
-	unsigned from = ((char *)dir - kaddr) & ~(exofs_chunk_size(inode)-1);
-	unsigned to = ((char *)dir - kaddr) + le16_to_cpu(dir->rec_len);
-	loff_t pos;
-	struct exofs_dir_entry *pde = NULL;
-	struct exofs_dir_entry *de = (struct exofs_dir_entry *) (kaddr + from);
-	int err;
-
-	while (de < dir) {
-		if (de->rec_len == 0) {
-			EXOFS_ERR("ERROR: exofs_delete_entry:"
-				  "zero-length entry in directory(0x%lx)\n",
-				  inode->i_ino);
-			err = -EIO;
-			goto out;
-		}
-		pde = de;
-		de = exofs_next_entry(de);
-	}
-	if (pde)
-		from = (char *)pde - (char *)page_address(page);
-	pos = page_offset(page) + from;
-	lock_page(page);
-	err = exofs_write_begin(NULL, page->mapping, pos, to - from, 0,
-							&page, NULL);
-	if (err)
-		EXOFS_ERR("exofs_delete_entry: exofs_write_begin FAILED => %d\n",
-			  err);
-	if (pde)
-		pde->rec_len = cpu_to_le16(to - from);
-	dir->inode_no = 0;
-	if (likely(!err))
-		err = exofs_commit_chunk(page, pos, to - from);
-	inode->i_ctime = inode->i_mtime = current_time(inode);
-	mark_inode_dirty(inode);
-	sbi->s_numfiles--;
-out:
-	exofs_put_page(page);
-	return err;
-}
-
-/* kept aligned on 4 bytes */
-#define THIS_DIR ".\0\0"
-#define PARENT_DIR "..\0"
-
-int exofs_make_empty(struct inode *inode, struct inode *parent)
-{
-	struct address_space *mapping = inode->i_mapping;
-	struct page *page = grab_cache_page(mapping, 0);
-	unsigned chunk_size = exofs_chunk_size(inode);
-	struct exofs_dir_entry *de;
-	int err;
-	void *kaddr;
-
-	if (!page)
-		return -ENOMEM;
-
-	err = exofs_write_begin(NULL, page->mapping, 0, chunk_size, 0,
-							&page, NULL);
-	if (err) {
-		unlock_page(page);
-		goto fail;
-	}
-
-	kaddr = kmap_atomic(page);
-	de = (struct exofs_dir_entry *)kaddr;
-	de->name_len = 1;
-	de->rec_len = cpu_to_le16(EXOFS_DIR_REC_LEN(1));
-	memcpy(de->name, THIS_DIR, sizeof(THIS_DIR));
-	de->inode_no = cpu_to_le64(inode->i_ino);
-	exofs_set_de_type(de, inode);
-
-	de = (struct exofs_dir_entry *)(kaddr + EXOFS_DIR_REC_LEN(1));
-	de->name_len = 2;
-	de->rec_len = cpu_to_le16(chunk_size - EXOFS_DIR_REC_LEN(1));
-	de->inode_no = cpu_to_le64(parent->i_ino);
-	memcpy(de->name, PARENT_DIR, sizeof(PARENT_DIR));
-	exofs_set_de_type(de, inode);
-	kunmap_atomic(kaddr);
-	err = exofs_commit_chunk(page, 0, chunk_size);
-fail:
-	put_page(page);
-	return err;
-}
-
-int exofs_empty_dir(struct inode *inode)
-{
-	struct page *page = NULL;
-	unsigned long i, npages = dir_pages(inode);
-
-	for (i = 0; i < npages; i++) {
-		char *kaddr;
-		struct exofs_dir_entry *de;
-		page = exofs_get_page(inode, i);
-
-		if (IS_ERR(page))
-			continue;
-
-		kaddr = page_address(page);
-		de = (struct exofs_dir_entry *)kaddr;
-		kaddr += exofs_last_byte(inode, i) - EXOFS_DIR_REC_LEN(1);
-
-		while ((char *)de <= kaddr) {
-			if (de->rec_len == 0) {
-				EXOFS_ERR("ERROR: exofs_empty_dir: "
-					  "zero-length directory entry"
-					  "kaddr=%p, de=%p\n", kaddr, de);
-				goto not_empty;
-			}
-			if (de->inode_no != 0) {
-				/* check for . and .. */
-				if (de->name[0] != '.')
-					goto not_empty;
-				if (de->name_len > 2)
-					goto not_empty;
-				if (de->name_len < 2) {
-					if (le64_to_cpu(de->inode_no) !=
-					    inode->i_ino)
-						goto not_empty;
-				} else if (de->name[1] != '.')
-					goto not_empty;
-			}
-			de = exofs_next_entry(de);
-		}
-		exofs_put_page(page);
-	}
-	return 1;
-
-not_empty:
-	exofs_put_page(page);
-	return 0;
-}
-
-const struct file_operations exofs_dir_operations = {
-	.llseek		= generic_file_llseek,
-	.read		= generic_read_dir,
-	.iterate_shared	= exofs_readdir,
-};
diff --git a/fs/exofs/exofs.h b/fs/exofs/exofs.h
deleted file mode 100644
index 5dc392404559..000000000000
--- a/fs/exofs/exofs.h
+++ /dev/null
@@ -1,240 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- *     Copyright (C) 1992, 1993, 1994, 1995
- *     Remy Card (card@masi.ibp.fr)
- *     Laboratoire MASI - Institut Blaise Pascal
- *     Universite Pierre et Marie Curie (Paris VI)
- *     from
- *     linux/fs/minix/inode.c
- *     Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-#ifndef __EXOFS_H__
-#define __EXOFS_H__
-
-#include <linux/fs.h>
-#include <linux/time.h>
-#include <linux/backing-dev.h>
-#include <scsi/osd_ore.h>
-
-#include "common.h"
-
-#define EXOFS_ERR(fmt, a...) printk(KERN_ERR "exofs: " fmt, ##a)
-
-#ifdef CONFIG_EXOFS_DEBUG
-#define EXOFS_DBGMSG(fmt, a...) \
-	printk(KERN_NOTICE "exofs @%s:%d: " fmt, __func__, __LINE__, ##a)
-#else
-#define EXOFS_DBGMSG(fmt, a...) \
-	do { if (0) printk(fmt, ##a); } while (0)
-#endif
-
-/* u64 has problems with printk this will cast it to unsigned long long */
-#define _LLU(x) (unsigned long long)(x)
-
-struct exofs_dev {
-	struct ore_dev ored;
-	unsigned did;
-	unsigned urilen;
-	uint8_t *uri;
-	struct kobject ed_kobj;
-};
-/*
- * our extension to the in-memory superblock
- */
-struct exofs_sb_info {
-	struct exofs_sb_stats s_ess;		/* Written often, pre-allocate*/
-	int		s_timeout;		/* timeout for OSD operations */
-	uint64_t	s_nextid;		/* highest object ID used     */
-	uint32_t	s_numfiles;		/* number of files on fs      */
-	spinlock_t	s_next_gen_lock;	/* spinlock for gen # update  */
-	u32		s_next_generation;	/* next gen # to use          */
-	atomic_t	s_curr_pending;		/* number of pending commands */
-
-	struct ore_layout	layout;		/* Default files layout       */
-	struct ore_comp one_comp;		/* id & cred of partition id=0*/
-	struct ore_components oc;		/* comps for the partition    */
-	struct kobject	s_kobj;			/* holds per-sbi kobject      */
-};
-
-/*
- * our extension to the in-memory inode
- */
-struct exofs_i_info {
-	struct inode   vfs_inode;          /* normal in-memory inode          */
-	wait_queue_head_t i_wq;            /* wait queue for inode            */
-	unsigned long  i_flags;            /* various atomic flags            */
-	uint32_t       i_data[EXOFS_IDATA];/*short symlink names and device #s*/
-	uint32_t       i_dir_start_lookup; /* which page to start lookup      */
-	uint64_t       i_commit_size;      /* the object's written length     */
-	struct ore_comp one_comp;	   /* same component for all devices  */
-	struct ore_components oc;	   /* inode view of the device table  */
-};
-
-static inline osd_id exofs_oi_objno(struct exofs_i_info *oi)
-{
-	return oi->vfs_inode.i_ino + EXOFS_OBJ_OFF;
-}
-
-/*
- * our inode flags
- */
-#define OBJ_2BCREATED	0	/* object will be created soon*/
-#define OBJ_CREATED	1	/* object has been created on the osd*/
-
-static inline int obj_2bcreated(struct exofs_i_info *oi)
-{
-	return test_bit(OBJ_2BCREATED, &oi->i_flags);
-}
-
-static inline void set_obj_2bcreated(struct exofs_i_info *oi)
-{
-	set_bit(OBJ_2BCREATED, &oi->i_flags);
-}
-
-static inline int obj_created(struct exofs_i_info *oi)
-{
-	return test_bit(OBJ_CREATED, &oi->i_flags);
-}
-
-static inline void set_obj_created(struct exofs_i_info *oi)
-{
-	set_bit(OBJ_CREATED, &oi->i_flags);
-}
-
-int __exofs_wait_obj_created(struct exofs_i_info *oi);
-static inline int wait_obj_created(struct exofs_i_info *oi)
-{
-	if (likely(obj_created(oi)))
-		return 0;
-
-	return __exofs_wait_obj_created(oi);
-}
-
-/*
- * get to our inode from the vfs inode
- */
-static inline struct exofs_i_info *exofs_i(struct inode *inode)
-{
-	return container_of(inode, struct exofs_i_info, vfs_inode);
-}
-
-/*
- * Maximum count of links to a file
- */
-#define EXOFS_LINK_MAX           32000
-
-/*************************
- * function declarations *
- *************************/
-
-/* inode.c               */
-unsigned exofs_max_io_pages(struct ore_layout *layout,
-			    unsigned expected_pages);
-int exofs_setattr(struct dentry *, struct iattr *);
-int exofs_write_begin(struct file *file, struct address_space *mapping,
-		loff_t pos, unsigned len, unsigned flags,
-		struct page **pagep, void **fsdata);
-extern struct inode *exofs_iget(struct super_block *, unsigned long);
-struct inode *exofs_new_inode(struct inode *, umode_t);
-extern int exofs_write_inode(struct inode *, struct writeback_control *wbc);
-extern void exofs_evict_inode(struct inode *);
-
-/* dir.c:                */
-int exofs_add_link(struct dentry *, struct inode *);
-ino_t exofs_inode_by_name(struct inode *, struct dentry *);
-int exofs_delete_entry(struct exofs_dir_entry *, struct page *);
-int exofs_make_empty(struct inode *, struct inode *);
-struct exofs_dir_entry *exofs_find_entry(struct inode *, struct dentry *,
-					 struct page **);
-int exofs_empty_dir(struct inode *);
-struct exofs_dir_entry *exofs_dotdot(struct inode *, struct page **);
-ino_t exofs_parent_ino(struct dentry *child);
-int exofs_set_link(struct inode *, struct exofs_dir_entry *, struct page *,
-		    struct inode *);
-
-/* super.c               */
-void exofs_make_credential(u8 cred_a[OSD_CAP_LEN],
-			   const struct osd_obj_id *obj);
-int exofs_sbi_write_stats(struct exofs_sb_info *sbi);
-
-/* sys.c                 */
-int exofs_sysfs_init(void);
-void exofs_sysfs_uninit(void);
-int exofs_sysfs_sb_add(struct exofs_sb_info *sbi,
-		       struct exofs_dt_device_info *dt_dev);
-void exofs_sysfs_sb_del(struct exofs_sb_info *sbi);
-int exofs_sysfs_odev_add(struct exofs_dev *edev,
-			 struct exofs_sb_info *sbi);
-void exofs_sysfs_dbg_print(void);
-
-/*********************
- * operation vectors *
- *********************/
-/* dir.c:            */
-extern const struct file_operations exofs_dir_operations;
-
-/* file.c            */
-extern const struct inode_operations exofs_file_inode_operations;
-extern const struct file_operations exofs_file_operations;
-
-/* inode.c           */
-extern const struct address_space_operations exofs_aops;
-
-/* namei.c           */
-extern const struct inode_operations exofs_dir_inode_operations;
-extern const struct inode_operations exofs_special_inode_operations;
-
-/* exofs_init_comps will initialize an ore_components device array
- * pointing to a single ore_comp struct, and a round-robin view
- * of the device table.
- * The first device of each inode is the [inode->ino % num_devices]
- * and the rest of the devices sequentially following where the
- * first device is after the last device.
- * It is assumed that the global device array at @sbi is twice
- * bigger and that the device table repeats twice.
- * See: exofs_read_lookup_dev_table()
- */
-static inline void exofs_init_comps(struct ore_components *oc,
-				    struct ore_comp *one_comp,
-				    struct exofs_sb_info *sbi, osd_id oid)
-{
-	unsigned dev_mod = (unsigned)oid, first_dev;
-
-	one_comp->obj.partition = sbi->one_comp.obj.partition;
-	one_comp->obj.id = oid;
-	exofs_make_credential(one_comp->cred, &one_comp->obj);
-
-	oc->first_dev = 0;
-	oc->numdevs = sbi->layout.group_width * sbi->layout.mirrors_p1 *
-							sbi->layout.group_count;
-	oc->single_comp = EC_SINGLE_COMP;
-	oc->comps = one_comp;
-
-	/* Round robin device view of the table */
-	first_dev = (dev_mod * sbi->layout.mirrors_p1) % sbi->oc.numdevs;
-	oc->ods = &sbi->oc.ods[first_dev];
-}
-
-#endif
diff --git a/fs/exofs/file.c b/fs/exofs/file.c
deleted file mode 100644
index a94594ea2aa3..000000000000
--- a/fs/exofs/file.c
+++ /dev/null
@@ -1,83 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- *     Copyright (C) 1992, 1993, 1994, 1995
- *     Remy Card (card@masi.ibp.fr)
- *     Laboratoire MASI - Institut Blaise Pascal
- *     Universite Pierre et Marie Curie (Paris VI)
- *     from
- *     linux/fs/minix/inode.c
- *     Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-#include "exofs.h"
-
-static int exofs_release_file(struct inode *inode, struct file *filp)
-{
-	return 0;
-}
-
-/* exofs_file_fsync - flush the inode to disk
- *
- *   Note, in exofs all metadata is written as part of inode, regardless.
- *   The writeout is synchronous
- */
-static int exofs_file_fsync(struct file *filp, loff_t start, loff_t end,
-			    int datasync)
-{
-	struct inode *inode = filp->f_mapping->host;
-	int ret;
-
-	ret = file_write_and_wait_range(filp, start, end);
-	if (ret)
-		return ret;
-
-	inode_lock(inode);
-	ret = sync_inode_metadata(filp->f_mapping->host, 1);
-	inode_unlock(inode);
-	return ret;
-}
-
-static int exofs_flush(struct file *file, fl_owner_t id)
-{
-	int ret = vfs_fsync(file, 0);
-	/* TODO: Flush the OSD target */
-	return ret;
-}
-
-const struct file_operations exofs_file_operations = {
-	.llseek		= generic_file_llseek,
-	.read_iter	= generic_file_read_iter,
-	.write_iter	= generic_file_write_iter,
-	.mmap		= generic_file_mmap,
-	.open		= generic_file_open,
-	.release	= exofs_release_file,
-	.fsync		= exofs_file_fsync,
-	.flush		= exofs_flush,
-	.splice_read	= generic_file_splice_read,
-	.splice_write	= iter_file_splice_write,
-};
-
-const struct inode_operations exofs_file_inode_operations = {
-	.setattr	= exofs_setattr,
-};
diff --git a/fs/exofs/inode.c b/fs/exofs/inode.c
deleted file mode 100644
index 5f81fcd383a4..000000000000
--- a/fs/exofs/inode.c
+++ /dev/null
@@ -1,1514 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- *     Copyright (C) 1992, 1993, 1994, 1995
- *     Remy Card (card@masi.ibp.fr)
- *     Laboratoire MASI - Institut Blaise Pascal
- *     Universite Pierre et Marie Curie (Paris VI)
- *     from
- *     linux/fs/minix/inode.c
- *     Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/slab.h>
-
-#include "exofs.h"
-
-#define EXOFS_DBGMSG2(M...) do {} while (0)
-
-unsigned exofs_max_io_pages(struct ore_layout *layout,
-			    unsigned expected_pages)
-{
-	unsigned pages = min_t(unsigned, expected_pages,
-			       layout->max_io_length / PAGE_SIZE);
-
-	return pages;
-}
-
-struct page_collect {
-	struct exofs_sb_info *sbi;
-	struct inode *inode;
-	unsigned expected_pages;
-	struct ore_io_state *ios;
-
-	struct page **pages;
-	unsigned alloc_pages;
-	unsigned nr_pages;
-	unsigned long length;
-	loff_t pg_first; /* keep 64bit also in 32-arches */
-	bool read_4_write; /* This means two things: that the read is sync
-			    * And the pages should not be unlocked.
-			    */
-	struct page *that_locked_page;
-};
-
-static void _pcol_init(struct page_collect *pcol, unsigned expected_pages,
-		       struct inode *inode)
-{
-	struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
-
-	pcol->sbi = sbi;
-	pcol->inode = inode;
-	pcol->expected_pages = expected_pages;
-
-	pcol->ios = NULL;
-	pcol->pages = NULL;
-	pcol->alloc_pages = 0;
-	pcol->nr_pages = 0;
-	pcol->length = 0;
-	pcol->pg_first = -1;
-	pcol->read_4_write = false;
-	pcol->that_locked_page = NULL;
-}
-
-static void _pcol_reset(struct page_collect *pcol)
-{
-	pcol->expected_pages -= min(pcol->nr_pages, pcol->expected_pages);
-
-	pcol->pages = NULL;
-	pcol->alloc_pages = 0;
-	pcol->nr_pages = 0;
-	pcol->length = 0;
-	pcol->pg_first = -1;
-	pcol->ios = NULL;
-	pcol->that_locked_page = NULL;
-
-	/* this is probably the end of the loop but in writes
-	 * it might not end here. don't be left with nothing
-	 */
-	if (!pcol->expected_pages)
-		pcol->expected_pages =
-				exofs_max_io_pages(&pcol->sbi->layout, ~0);
-}
-
-static int pcol_try_alloc(struct page_collect *pcol)
-{
-	unsigned pages;
-
-	/* TODO: easily support bio chaining */
-	pages =  exofs_max_io_pages(&pcol->sbi->layout, pcol->expected_pages);
-
-	for (; pages; pages >>= 1) {
-		pcol->pages = kmalloc_array(pages, sizeof(struct page *),
-					    GFP_KERNEL);
-		if (likely(pcol->pages)) {
-			pcol->alloc_pages = pages;
-			return 0;
-		}
-	}
-
-	EXOFS_ERR("Failed to kmalloc expected_pages=%u\n",
-		  pcol->expected_pages);
-	return -ENOMEM;
-}
-
-static void pcol_free(struct page_collect *pcol)
-{
-	kfree(pcol->pages);
-	pcol->pages = NULL;
-
-	if (pcol->ios) {
-		ore_put_io_state(pcol->ios);
-		pcol->ios = NULL;
-	}
-}
-
-static int pcol_add_page(struct page_collect *pcol, struct page *page,
-			 unsigned len)
-{
-	if (unlikely(pcol->nr_pages >= pcol->alloc_pages))
-		return -ENOMEM;
-
-	pcol->pages[pcol->nr_pages++] = page;
-	pcol->length += len;
-	return 0;
-}
-
-enum {PAGE_WAS_NOT_IN_IO = 17};
-static int update_read_page(struct page *page, int ret)
-{
-	switch (ret) {
-	case 0:
-		/* Everything is OK */
-		SetPageUptodate(page);
-		if (PageError(page))
-			ClearPageError(page);
-		break;
-	case -EFAULT:
-		/* In this case we were trying to read something that wasn't on
-		 * disk yet - return a page full of zeroes.  This should be OK,
-		 * because the object should be empty (if there was a write
-		 * before this read, the read would be waiting with the page
-		 * locked */
-		clear_highpage(page);
-
-		SetPageUptodate(page);
-		if (PageError(page))
-			ClearPageError(page);
-		EXOFS_DBGMSG("recovered read error\n");
-		/* fall through */
-	case PAGE_WAS_NOT_IN_IO:
-		ret = 0; /* recovered error */
-		break;
-	default:
-		SetPageError(page);
-	}
-	return ret;
-}
-
-static void update_write_page(struct page *page, int ret)
-{
-	if (unlikely(ret == PAGE_WAS_NOT_IN_IO))
-		return; /* don't pass start don't collect $200 */
-
-	if (ret) {
-		mapping_set_error(page->mapping, ret);
-		SetPageError(page);
-	}
-	end_page_writeback(page);
-}
-
-/* Called at the end of reads, to optionally unlock pages and update their
- * status.
- */
-static int __readpages_done(struct page_collect *pcol)
-{
-	int i;
-	u64 good_bytes;
-	u64 length = 0;
-	int ret = ore_check_io(pcol->ios, NULL);
-
-	if (likely(!ret)) {
-		good_bytes = pcol->length;
-		ret = PAGE_WAS_NOT_IN_IO;
-	} else {
-		good_bytes = 0;
-	}
-
-	EXOFS_DBGMSG2("readpages_done(0x%lx) good_bytes=0x%llx"
-		     " length=0x%lx nr_pages=%u\n",
-		     pcol->inode->i_ino, _LLU(good_bytes), pcol->length,
-		     pcol->nr_pages);
-
-	for (i = 0; i < pcol->nr_pages; i++) {
-		struct page *page = pcol->pages[i];
-		struct inode *inode = page->mapping->host;
-		int page_stat;
-
-		if (inode != pcol->inode)
-			continue; /* osd might add more pages at end */
-
-		if (likely(length < good_bytes))
-			page_stat = 0;
-		else
-			page_stat = ret;
-
-		EXOFS_DBGMSG2("    readpages_done(0x%lx, 0x%lx) %s\n",
-			  inode->i_ino, page->index,
-			  page_stat ? "bad_bytes" : "good_bytes");
-
-		ret = update_read_page(page, page_stat);
-		if (!pcol->read_4_write)
-			unlock_page(page);
-		length += PAGE_SIZE;
-	}
-
-	pcol_free(pcol);
-	EXOFS_DBGMSG2("readpages_done END\n");
-	return ret;
-}
-
-/* callback of async reads */
-static void readpages_done(struct ore_io_state *ios, void *p)
-{
-	struct page_collect *pcol = p;
-
-	__readpages_done(pcol);
-	atomic_dec(&pcol->sbi->s_curr_pending);
-	kfree(pcol);
-}
-
-static void _unlock_pcol_pages(struct page_collect *pcol, int ret, int rw)
-{
-	int i;
-
-	for (i = 0; i < pcol->nr_pages; i++) {
-		struct page *page = pcol->pages[i];
-
-		if (rw == READ)
-			update_read_page(page, ret);
-		else
-			update_write_page(page, ret);
-
-		unlock_page(page);
-	}
-}
-
-static int _maybe_not_all_in_one_io(struct ore_io_state *ios,
-	struct page_collect *pcol_src, struct page_collect *pcol)
-{
-	/* length was wrong or offset was not page aligned */
-	BUG_ON(pcol_src->nr_pages < ios->nr_pages);
-
-	if (pcol_src->nr_pages > ios->nr_pages) {
-		struct page **src_page;
-		unsigned pages_less = pcol_src->nr_pages - ios->nr_pages;
-		unsigned long len_less = pcol_src->length - ios->length;
-		unsigned i;
-		int ret;
-
-		/* This IO was trimmed */
-		pcol_src->nr_pages = ios->nr_pages;
-		pcol_src->length = ios->length;
-
-		/* Left over pages are passed to the next io */
-		pcol->expected_pages += pages_less;
-		pcol->nr_pages = pages_less;
-		pcol->length = len_less;
-		src_page = pcol_src->pages + pcol_src->nr_pages;
-		pcol->pg_first = (*src_page)->index;
-
-		ret = pcol_try_alloc(pcol);
-		if (unlikely(ret))
-			return ret;
-
-		for (i = 0; i < pages_less; ++i)
-			pcol->pages[i] = *src_page++;
-
-		EXOFS_DBGMSG("Length was adjusted nr_pages=0x%x "
-			"pages_less=0x%x expected_pages=0x%x "
-			"next_offset=0x%llx next_len=0x%lx\n",
-			pcol_src->nr_pages, pages_less, pcol->expected_pages,
-			pcol->pg_first * PAGE_SIZE, pcol->length);
-	}
-	return 0;
-}
-
-static int read_exec(struct page_collect *pcol)
-{
-	struct exofs_i_info *oi = exofs_i(pcol->inode);
-	struct ore_io_state *ios;
-	struct page_collect *pcol_copy = NULL;
-	int ret;
-
-	if (!pcol->pages)
-		return 0;
-
-	if (!pcol->ios) {
-		int ret = ore_get_rw_state(&pcol->sbi->layout, &oi->oc, true,
-					     pcol->pg_first << PAGE_SHIFT,
-					     pcol->length, &pcol->ios);
-
-		if (ret)
-			return ret;
-	}
-
-	ios = pcol->ios;
-	ios->pages = pcol->pages;
-
-	if (pcol->read_4_write) {
-		ore_read(pcol->ios);
-		return __readpages_done(pcol);
-	}
-
-	pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL);
-	if (!pcol_copy) {
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	*pcol_copy = *pcol;
-	ios->done = readpages_done;
-	ios->private = pcol_copy;
-
-	/* pages ownership was passed to pcol_copy */
-	_pcol_reset(pcol);
-
-	ret = _maybe_not_all_in_one_io(ios, pcol_copy, pcol);
-	if (unlikely(ret))
-		goto err;
-
-	EXOFS_DBGMSG2("read_exec(0x%lx) offset=0x%llx length=0x%llx\n",
-		pcol->inode->i_ino, _LLU(ios->offset), _LLU(ios->length));
-
-	ret = ore_read(ios);
-	if (unlikely(ret))
-		goto err;
-
-	atomic_inc(&pcol->sbi->s_curr_pending);
-
-	return 0;
-
-err:
-	if (!pcol_copy) /* Failed before ownership transfer */
-		pcol_copy = pcol;
-	_unlock_pcol_pages(pcol_copy, ret, READ);
-	pcol_free(pcol_copy);
-	kfree(pcol_copy);
-
-	return ret;
-}
-
-/* readpage_strip is called either directly from readpage() or by the VFS from
- * within read_cache_pages(), to add one more page to be read. It will try to
- * collect as many contiguous pages as posible. If a discontinuity is
- * encountered, or it runs out of resources, it will submit the previous segment
- * and will start a new collection. Eventually caller must submit the last
- * segment if present.
- */
-static int readpage_strip(void *data, struct page *page)
-{
-	struct page_collect *pcol = data;
-	struct inode *inode = pcol->inode;
-	struct exofs_i_info *oi = exofs_i(inode);
-	loff_t i_size = i_size_read(inode);
-	pgoff_t end_index = i_size >> PAGE_SHIFT;
-	size_t len;
-	int ret;
-
-	BUG_ON(!PageLocked(page));
-
-	/* FIXME: Just for debugging, will be removed */
-	if (PageUptodate(page))
-		EXOFS_ERR("PageUptodate(0x%lx, 0x%lx)\n", pcol->inode->i_ino,
-			  page->index);
-
-	pcol->that_locked_page = page;
-
-	if (page->index < end_index)
-		len = PAGE_SIZE;
-	else if (page->index == end_index)
-		len = i_size & ~PAGE_MASK;
-	else
-		len = 0;
-
-	if (!len || !obj_created(oi)) {
-		/* this will be out of bounds, or doesn't exist yet.
-		 * Current page is cleared and the request is split
-		 */
-		clear_highpage(page);
-
-		SetPageUptodate(page);
-		if (PageError(page))
-			ClearPageError(page);
-
-		if (!pcol->read_4_write)
-			unlock_page(page);
-		EXOFS_DBGMSG("readpage_strip(0x%lx) empty page len=%zx "
-			     "read_4_write=%d index=0x%lx end_index=0x%lx "
-			     "splitting\n", inode->i_ino, len,
-			     pcol->read_4_write, page->index, end_index);
-
-		return read_exec(pcol);
-	}
-
-try_again:
-
-	if (unlikely(pcol->pg_first == -1)) {
-		pcol->pg_first = page->index;
-	} else if (unlikely((pcol->pg_first + pcol->nr_pages) !=
-		   page->index)) {
-		/* Discontinuity detected, split the request */
-		ret = read_exec(pcol);
-		if (unlikely(ret))
-			goto fail;
-		goto try_again;
-	}
-
-	if (!pcol->pages) {
-		ret = pcol_try_alloc(pcol);
-		if (unlikely(ret))
-			goto fail;
-	}
-
-	if (len != PAGE_SIZE)
-		zero_user(page, len, PAGE_SIZE - len);
-
-	EXOFS_DBGMSG2("    readpage_strip(0x%lx, 0x%lx) len=0x%zx\n",
-		     inode->i_ino, page->index, len);
-
-	ret = pcol_add_page(pcol, page, len);
-	if (ret) {
-		EXOFS_DBGMSG2("Failed pcol_add_page pages[i]=%p "
-			  "this_len=0x%zx nr_pages=%u length=0x%lx\n",
-			  page, len, pcol->nr_pages, pcol->length);
-
-		/* split the request, and start again with current page */
-		ret = read_exec(pcol);
-		if (unlikely(ret))
-			goto fail;
-
-		goto try_again;
-	}
-
-	return 0;
-
-fail:
-	/* SetPageError(page); ??? */
-	unlock_page(page);
-	return ret;
-}
-
-static int exofs_readpages(struct file *file, struct address_space *mapping,
-			   struct list_head *pages, unsigned nr_pages)
-{
-	struct page_collect pcol;
-	int ret;
-
-	_pcol_init(&pcol, nr_pages, mapping->host);
-
-	ret = read_cache_pages(mapping, pages, readpage_strip, &pcol);
-	if (ret) {
-		EXOFS_ERR("read_cache_pages => %d\n", ret);
-		return ret;
-	}
-
-	ret = read_exec(&pcol);
-	if (unlikely(ret))
-		return ret;
-
-	return read_exec(&pcol);
-}
-
-static int _readpage(struct page *page, bool read_4_write)
-{
-	struct page_collect pcol;
-	int ret;
-
-	_pcol_init(&pcol, 1, page->mapping->host);
-
-	pcol.read_4_write = read_4_write;
-	ret = readpage_strip(&pcol, page);
-	if (ret) {
-		EXOFS_ERR("_readpage => %d\n", ret);
-		return ret;
-	}
-
-	return read_exec(&pcol);
-}
-
-/*
- * We don't need the file
- */
-static int exofs_readpage(struct file *file, struct page *page)
-{
-	return _readpage(page, false);
-}
-
-/* Callback for osd_write. All writes are asynchronous */
-static void writepages_done(struct ore_io_state *ios, void *p)
-{
-	struct page_collect *pcol = p;
-	int i;
-	u64  good_bytes;
-	u64  length = 0;
-	int ret = ore_check_io(ios, NULL);
-
-	atomic_dec(&pcol->sbi->s_curr_pending);
-
-	if (likely(!ret)) {
-		good_bytes = pcol->length;
-		ret = PAGE_WAS_NOT_IN_IO;
-	} else {
-		good_bytes = 0;
-	}
-
-	EXOFS_DBGMSG2("writepages_done(0x%lx) good_bytes=0x%llx"
-		     " length=0x%lx nr_pages=%u\n",
-		     pcol->inode->i_ino, _LLU(good_bytes), pcol->length,
-		     pcol->nr_pages);
-
-	for (i = 0; i < pcol->nr_pages; i++) {
-		struct page *page = pcol->pages[i];
-		struct inode *inode = page->mapping->host;
-		int page_stat;
-
-		if (inode != pcol->inode)
-			continue; /* osd might add more pages to a bio */
-
-		if (likely(length < good_bytes))
-			page_stat = 0;
-		else
-			page_stat = ret;
-
-		update_write_page(page, page_stat);
-		unlock_page(page);
-		EXOFS_DBGMSG2("    writepages_done(0x%lx, 0x%lx) status=%d\n",
-			     inode->i_ino, page->index, page_stat);
-
-		length += PAGE_SIZE;
-	}
-
-	pcol_free(pcol);
-	kfree(pcol);
-	EXOFS_DBGMSG2("writepages_done END\n");
-}
-
-static struct page *__r4w_get_page(void *priv, u64 offset, bool *uptodate)
-{
-	struct page_collect *pcol = priv;
-	pgoff_t index = offset / PAGE_SIZE;
-
-	if (!pcol->that_locked_page ||
-	    (pcol->that_locked_page->index != index)) {
-		struct page *page;
-		loff_t i_size = i_size_read(pcol->inode);
-
-		if (offset >= i_size) {
-			*uptodate = true;
-			EXOFS_DBGMSG2("offset >= i_size index=0x%lx\n", index);
-			return ZERO_PAGE(0);
-		}
-
-		page =  find_get_page(pcol->inode->i_mapping, index);
-		if (!page) {
-			page = find_or_create_page(pcol->inode->i_mapping,
-						   index, GFP_NOFS);
-			if (unlikely(!page)) {
-				EXOFS_DBGMSG("grab_cache_page Failed "
-					"index=0x%llx\n", _LLU(index));
-				return NULL;
-			}
-			unlock_page(page);
-		}
-		*uptodate = PageUptodate(page);
-		EXOFS_DBGMSG2("index=0x%lx uptodate=%d\n", index, *uptodate);
-		return page;
-	} else {
-		EXOFS_DBGMSG2("YES that_locked_page index=0x%lx\n",
-			     pcol->that_locked_page->index);
-		*uptodate = true;
-		return pcol->that_locked_page;
-	}
-}
-
-static void __r4w_put_page(void *priv, struct page *page)
-{
-	struct page_collect *pcol = priv;
-
-	if ((pcol->that_locked_page != page) && (ZERO_PAGE(0) != page)) {
-		EXOFS_DBGMSG2("index=0x%lx\n", page->index);
-		put_page(page);
-		return;
-	}
-	EXOFS_DBGMSG2("that_locked_page index=0x%lx\n",
-		     ZERO_PAGE(0) == page ? -1 : page->index);
-}
-
-static const struct _ore_r4w_op _r4w_op = {
-	.get_page = &__r4w_get_page,
-	.put_page = &__r4w_put_page,
-};
-
-static int write_exec(struct page_collect *pcol)
-{
-	struct exofs_i_info *oi = exofs_i(pcol->inode);
-	struct ore_io_state *ios;
-	struct page_collect *pcol_copy = NULL;
-	int ret;
-
-	if (!pcol->pages)
-		return 0;
-
-	BUG_ON(pcol->ios);
-	ret = ore_get_rw_state(&pcol->sbi->layout, &oi->oc, false,
-				 pcol->pg_first << PAGE_SHIFT,
-				 pcol->length, &pcol->ios);
-	if (unlikely(ret))
-		goto err;
-
-	pcol_copy = kmalloc(sizeof(*pcol_copy), GFP_KERNEL);
-	if (!pcol_copy) {
-		EXOFS_ERR("write_exec: Failed to kmalloc(pcol)\n");
-		ret = -ENOMEM;
-		goto err;
-	}
-
-	*pcol_copy = *pcol;
-
-	ios = pcol->ios;
-	ios->pages = pcol_copy->pages;
-	ios->done = writepages_done;
-	ios->r4w = &_r4w_op;
-	ios->private = pcol_copy;
-
-	/* pages ownership was passed to pcol_copy */
-	_pcol_reset(pcol);
-
-	ret = _maybe_not_all_in_one_io(ios, pcol_copy, pcol);
-	if (unlikely(ret))
-		goto err;
-
-	EXOFS_DBGMSG2("write_exec(0x%lx) offset=0x%llx length=0x%llx\n",
-		pcol->inode->i_ino, _LLU(ios->offset), _LLU(ios->length));
-
-	ret = ore_write(ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("write_exec: ore_write() Failed\n");
-		goto err;
-	}
-
-	atomic_inc(&pcol->sbi->s_curr_pending);
-	return 0;
-
-err:
-	if (!pcol_copy) /* Failed before ownership transfer */
-		pcol_copy = pcol;
-	_unlock_pcol_pages(pcol_copy, ret, WRITE);
-	pcol_free(pcol_copy);
-	kfree(pcol_copy);
-
-	return ret;
-}
-
-/* writepage_strip is called either directly from writepage() or by the VFS from
- * within write_cache_pages(), to add one more page to be written to storage.
- * It will try to collect as many contiguous pages as possible. If a
- * discontinuity is encountered or it runs out of resources it will submit the
- * previous segment and will start a new collection.
- * Eventually caller must submit the last segment if present.
- */
-static int writepage_strip(struct page *page,
-			   struct writeback_control *wbc_unused, void *data)
-{
-	struct page_collect *pcol = data;
-	struct inode *inode = pcol->inode;
-	struct exofs_i_info *oi = exofs_i(inode);
-	loff_t i_size = i_size_read(inode);
-	pgoff_t end_index = i_size >> PAGE_SHIFT;
-	size_t len;
-	int ret;
-
-	BUG_ON(!PageLocked(page));
-
-	ret = wait_obj_created(oi);
-	if (unlikely(ret))
-		goto fail;
-
-	if (page->index < end_index)
-		/* in this case, the page is within the limits of the file */
-		len = PAGE_SIZE;
-	else {
-		len = i_size & ~PAGE_MASK;
-
-		if (page->index > end_index || !len) {
-			/* in this case, the page is outside the limits
-			 * (truncate in progress)
-			 */
-			ret = write_exec(pcol);
-			if (unlikely(ret))
-				goto fail;
-			if (PageError(page))
-				ClearPageError(page);
-			unlock_page(page);
-			EXOFS_DBGMSG("writepage_strip(0x%lx, 0x%lx) "
-				     "outside the limits\n",
-				     inode->i_ino, page->index);
-			return 0;
-		}
-	}
-
-try_again:
-
-	if (unlikely(pcol->pg_first == -1)) {
-		pcol->pg_first = page->index;
-	} else if (unlikely((pcol->pg_first + pcol->nr_pages) !=
-		   page->index)) {
-		/* Discontinuity detected, split the request */
-		ret = write_exec(pcol);
-		if (unlikely(ret))
-			goto fail;
-
-		EXOFS_DBGMSG("writepage_strip(0x%lx, 0x%lx) Discontinuity\n",
-			     inode->i_ino, page->index);
-		goto try_again;
-	}
-
-	if (!pcol->pages) {
-		ret = pcol_try_alloc(pcol);
-		if (unlikely(ret))
-			goto fail;
-	}
-
-	EXOFS_DBGMSG2("    writepage_strip(0x%lx, 0x%lx) len=0x%zx\n",
-		     inode->i_ino, page->index, len);
-
-	ret = pcol_add_page(pcol, page, len);
-	if (unlikely(ret)) {
-		EXOFS_DBGMSG2("Failed pcol_add_page "
-			     "nr_pages=%u total_length=0x%lx\n",
-			     pcol->nr_pages, pcol->length);
-
-		/* split the request, next loop will start again */
-		ret = write_exec(pcol);
-		if (unlikely(ret)) {
-			EXOFS_DBGMSG("write_exec failed => %d", ret);
-			goto fail;
-		}
-
-		goto try_again;
-	}
-
-	BUG_ON(PageWriteback(page));
-	set_page_writeback(page);
-
-	return 0;
-
-fail:
-	EXOFS_DBGMSG("Error: writepage_strip(0x%lx, 0x%lx)=>%d\n",
-		     inode->i_ino, page->index, ret);
-	mapping_set_error(page->mapping, -EIO);
-	unlock_page(page);
-	return ret;
-}
-
-static int exofs_writepages(struct address_space *mapping,
-		       struct writeback_control *wbc)
-{
-	struct page_collect pcol;
-	long start, end, expected_pages;
-	int ret;
-
-	start = wbc->range_start >> PAGE_SHIFT;
-	end = (wbc->range_end == LLONG_MAX) ?
-			start + mapping->nrpages :
-			wbc->range_end >> PAGE_SHIFT;
-
-	if (start || end)
-		expected_pages = end - start + 1;
-	else
-		expected_pages = mapping->nrpages;
-
-	if (expected_pages < 32L)
-		expected_pages = 32L;
-
-	EXOFS_DBGMSG2("inode(0x%lx) wbc->start=0x%llx wbc->end=0x%llx "
-		     "nrpages=%lu start=0x%lx end=0x%lx expected_pages=%ld\n",
-		     mapping->host->i_ino, wbc->range_start, wbc->range_end,
-		     mapping->nrpages, start, end, expected_pages);
-
-	_pcol_init(&pcol, expected_pages, mapping->host);
-
-	ret = write_cache_pages(mapping, wbc, writepage_strip, &pcol);
-	if (unlikely(ret)) {
-		EXOFS_ERR("write_cache_pages => %d\n", ret);
-		return ret;
-	}
-
-	ret = write_exec(&pcol);
-	if (unlikely(ret))
-		return ret;
-
-	if (wbc->sync_mode == WB_SYNC_ALL) {
-		return write_exec(&pcol); /* pump the last reminder */
-	} else if (pcol.nr_pages) {
-		/* not SYNC let the reminder join the next writeout */
-		unsigned i;
-
-		for (i = 0; i < pcol.nr_pages; i++) {
-			struct page *page = pcol.pages[i];
-
-			end_page_writeback(page);
-			set_page_dirty(page);
-			unlock_page(page);
-		}
-	}
-	return 0;
-}
-
-/*
-static int exofs_writepage(struct page *page, struct writeback_control *wbc)
-{
-	struct page_collect pcol;
-	int ret;
-
-	_pcol_init(&pcol, 1, page->mapping->host);
-
-	ret = writepage_strip(page, NULL, &pcol);
-	if (ret) {
-		EXOFS_ERR("exofs_writepage => %d\n", ret);
-		return ret;
-	}
-
-	return write_exec(&pcol);
-}
-*/
-/* i_mutex held using inode->i_size directly */
-static void _write_failed(struct inode *inode, loff_t to)
-{
-	if (to > inode->i_size)
-		truncate_pagecache(inode, inode->i_size);
-}
-
-int exofs_write_begin(struct file *file, struct address_space *mapping,
-		loff_t pos, unsigned len, unsigned flags,
-		struct page **pagep, void **fsdata)
-{
-	int ret = 0;
-	struct page *page;
-
-	page = *pagep;
-	if (page == NULL) {
-		page = grab_cache_page_write_begin(mapping, pos >> PAGE_SHIFT,
-						   flags);
-		if (!page) {
-			EXOFS_DBGMSG("grab_cache_page_write_begin failed\n");
-			return -ENOMEM;
-		}
-		*pagep = page;
-	}
-
-	 /* read modify write */
-	if (!PageUptodate(page) && (len != PAGE_SIZE)) {
-		loff_t i_size = i_size_read(mapping->host);
-		pgoff_t end_index = i_size >> PAGE_SHIFT;
-
-		if (page->index > end_index) {
-			clear_highpage(page);
-			SetPageUptodate(page);
-		} else {
-			ret = _readpage(page, true);
-			if (ret) {
-				unlock_page(page);
-				EXOFS_DBGMSG("__readpage failed\n");
-			}
-		}
-	}
-	return ret;
-}
-
-static int exofs_write_begin_export(struct file *file,
-		struct address_space *mapping,
-		loff_t pos, unsigned len, unsigned flags,
-		struct page **pagep, void **fsdata)
-{
-	*pagep = NULL;
-
-	return exofs_write_begin(file, mapping, pos, len, flags, pagep,
-					fsdata);
-}
-
-static int exofs_write_end(struct file *file, struct address_space *mapping,
-			loff_t pos, unsigned len, unsigned copied,
-			struct page *page, void *fsdata)
-{
-	struct inode *inode = mapping->host;
-	loff_t last_pos = pos + copied;
-
-	if (!PageUptodate(page)) {
-		if (copied < len) {
-			_write_failed(inode, pos + len);
-			copied = 0;
-			goto out;
-		}
-		SetPageUptodate(page);
-	}
-	if (last_pos > inode->i_size) {
-		i_size_write(inode, last_pos);
-		mark_inode_dirty(inode);
-	}
-	set_page_dirty(page);
-out:
-	unlock_page(page);
-	put_page(page);
-	return copied;
-}
-
-static int exofs_releasepage(struct page *page, gfp_t gfp)
-{
-	EXOFS_DBGMSG("page 0x%lx\n", page->index);
-	WARN_ON(1);
-	return 0;
-}
-
-static void exofs_invalidatepage(struct page *page, unsigned int offset,
-				 unsigned int length)
-{
-	EXOFS_DBGMSG("page 0x%lx offset 0x%x length 0x%x\n",
-		     page->index, offset, length);
-	WARN_ON(1);
-}
-
-
- /* TODO: Should be easy enough to do proprly */
-static ssize_t exofs_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
-{
-	return 0;
-}
-
-const struct address_space_operations exofs_aops = {
-	.readpage	= exofs_readpage,
-	.readpages	= exofs_readpages,
-	.writepage	= NULL,
-	.writepages	= exofs_writepages,
-	.write_begin	= exofs_write_begin_export,
-	.write_end	= exofs_write_end,
-	.releasepage	= exofs_releasepage,
-	.set_page_dirty	= __set_page_dirty_nobuffers,
-	.invalidatepage = exofs_invalidatepage,
-
-	/* Not implemented Yet */
-	.bmap		= NULL, /* TODO: use osd's OSD_ACT_READ_MAP */
-	.direct_IO	= exofs_direct_IO,
-
-	/* With these NULL has special meaning or default is not exported */
-	.migratepage	= NULL,
-	.launder_page	= NULL,
-	.is_partially_uptodate = NULL,
-	.error_remove_page = NULL,
-};
-
-/******************************************************************************
- * INODE OPERATIONS
- *****************************************************************************/
-
-/*
- * Test whether an inode is a fast symlink.
- */
-static inline int exofs_inode_is_fast_symlink(struct inode *inode)
-{
-	struct exofs_i_info *oi = exofs_i(inode);
-
-	return S_ISLNK(inode->i_mode) && (oi->i_data[0] != 0);
-}
-
-static int _do_truncate(struct inode *inode, loff_t newsize)
-{
-	struct exofs_i_info *oi = exofs_i(inode);
-	struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
-	int ret;
-
-	inode->i_mtime = inode->i_ctime = current_time(inode);
-
-	ret = ore_truncate(&sbi->layout, &oi->oc, (u64)newsize);
-	if (likely(!ret))
-		truncate_setsize(inode, newsize);
-
-	EXOFS_DBGMSG2("(0x%lx) size=0x%llx ret=>%d\n",
-		     inode->i_ino, newsize, ret);
-	return ret;
-}
-
-/*
- * Set inode attributes - update size attribute on OSD if needed,
- *                        otherwise just call generic functions.
- */
-int exofs_setattr(struct dentry *dentry, struct iattr *iattr)
-{
-	struct inode *inode = d_inode(dentry);
-	int error;
-
-	/* if we are about to modify an object, and it hasn't been
-	 * created yet, wait
-	 */
-	error = wait_obj_created(exofs_i(inode));
-	if (unlikely(error))
-		return error;
-
-	error = setattr_prepare(dentry, iattr);
-	if (unlikely(error))
-		return error;
-
-	if ((iattr->ia_valid & ATTR_SIZE) &&
-	    iattr->ia_size != i_size_read(inode)) {
-		error = _do_truncate(inode, iattr->ia_size);
-		if (unlikely(error))
-			return error;
-	}
-
-	setattr_copy(inode, iattr);
-	mark_inode_dirty(inode);
-	return 0;
-}
-
-static const struct osd_attr g_attr_inode_file_layout = ATTR_DEF(
-	EXOFS_APAGE_FS_DATA,
-	EXOFS_ATTR_INODE_FILE_LAYOUT,
-	0);
-static const struct osd_attr g_attr_inode_dir_layout = ATTR_DEF(
-	EXOFS_APAGE_FS_DATA,
-	EXOFS_ATTR_INODE_DIR_LAYOUT,
-	0);
-
-/*
- * Read the Linux inode info from the OSD, and return it as is. In exofs the
- * inode info is in an application specific page/attribute of the osd-object.
- */
-static int exofs_get_inode(struct super_block *sb, struct exofs_i_info *oi,
-		    struct exofs_fcb *inode)
-{
-	struct exofs_sb_info *sbi = sb->s_fs_info;
-	struct osd_attr attrs[] = {
-		[0] = g_attr_inode_data,
-		[1] = g_attr_inode_file_layout,
-		[2] = g_attr_inode_dir_layout,
-	};
-	struct ore_io_state *ios;
-	struct exofs_on_disk_inode_layout *layout;
-	int ret;
-
-	ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__);
-		return ret;
-	}
-
-	attrs[1].len = exofs_on_disk_inode_layout_size(sbi->oc.numdevs);
-	attrs[2].len = exofs_on_disk_inode_layout_size(sbi->oc.numdevs);
-
-	ios->in_attr = attrs;
-	ios->in_attr_len = ARRAY_SIZE(attrs);
-
-	ret = ore_read(ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("object(0x%llx) corrupted, return empty file=>%d\n",
-			  _LLU(oi->one_comp.obj.id), ret);
-		memset(inode, 0, sizeof(*inode));
-		inode->i_mode = 0040000 | (0777 & ~022);
-		/* If object is lost on target we might as well enable it's
-		 * delete.
-		 */
-		ret = 0;
-		goto out;
-	}
-
-	ret = extract_attr_from_ios(ios, &attrs[0]);
-	if (ret) {
-		EXOFS_ERR("%s: extract_attr 0 of inode failed\n", __func__);
-		goto out;
-	}
-	WARN_ON(attrs[0].len != EXOFS_INO_ATTR_SIZE);
-	memcpy(inode, attrs[0].val_ptr, EXOFS_INO_ATTR_SIZE);
-
-	ret = extract_attr_from_ios(ios, &attrs[1]);
-	if (ret) {
-		EXOFS_ERR("%s: extract_attr 1 of inode failed\n", __func__);
-		goto out;
-	}
-	if (attrs[1].len) {
-		layout = attrs[1].val_ptr;
-		if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) {
-			EXOFS_ERR("%s: unsupported files layout %d\n",
-				__func__, layout->gen_func);
-			ret = -ENOTSUPP;
-			goto out;
-		}
-	}
-
-	ret = extract_attr_from_ios(ios, &attrs[2]);
-	if (ret) {
-		EXOFS_ERR("%s: extract_attr 2 of inode failed\n", __func__);
-		goto out;
-	}
-	if (attrs[2].len) {
-		layout = attrs[2].val_ptr;
-		if (layout->gen_func != cpu_to_le16(LAYOUT_MOVING_WINDOW)) {
-			EXOFS_ERR("%s: unsupported meta-data layout %d\n",
-				__func__, layout->gen_func);
-			ret = -ENOTSUPP;
-			goto out;
-		}
-	}
-
-out:
-	ore_put_io_state(ios);
-	return ret;
-}
-
-static void __oi_init(struct exofs_i_info *oi)
-{
-	init_waitqueue_head(&oi->i_wq);
-	oi->i_flags = 0;
-}
-/*
- * Fill in an inode read from the OSD and set it up for use
- */
-struct inode *exofs_iget(struct super_block *sb, unsigned long ino)
-{
-	struct exofs_i_info *oi;
-	struct exofs_fcb fcb;
-	struct inode *inode;
-	int ret;
-
-	inode = iget_locked(sb, ino);
-	if (!inode)
-		return ERR_PTR(-ENOMEM);
-	if (!(inode->i_state & I_NEW))
-		return inode;
-	oi = exofs_i(inode);
-	__oi_init(oi);
-	exofs_init_comps(&oi->oc, &oi->one_comp, sb->s_fs_info,
-			 exofs_oi_objno(oi));
-
-	/* read the inode from the osd */
-	ret = exofs_get_inode(sb, oi, &fcb);
-	if (ret)
-		goto bad_inode;
-
-	set_obj_created(oi);
-
-	/* copy stuff from on-disk struct to in-memory struct */
-	inode->i_mode = le16_to_cpu(fcb.i_mode);
-	i_uid_write(inode, le32_to_cpu(fcb.i_uid));
-	i_gid_write(inode, le32_to_cpu(fcb.i_gid));
-	set_nlink(inode, le16_to_cpu(fcb.i_links_count));
-	inode->i_ctime.tv_sec = (signed)le32_to_cpu(fcb.i_ctime);
-	inode->i_atime.tv_sec = (signed)le32_to_cpu(fcb.i_atime);
-	inode->i_mtime.tv_sec = (signed)le32_to_cpu(fcb.i_mtime);
-	inode->i_ctime.tv_nsec =
-		inode->i_atime.tv_nsec = inode->i_mtime.tv_nsec = 0;
-	oi->i_commit_size = le64_to_cpu(fcb.i_size);
-	i_size_write(inode, oi->i_commit_size);
-	inode->i_blkbits = EXOFS_BLKSHIFT;
-	inode->i_generation = le32_to_cpu(fcb.i_generation);
-
-	oi->i_dir_start_lookup = 0;
-
-	if ((inode->i_nlink == 0) && (inode->i_mode == 0)) {
-		ret = -ESTALE;
-		goto bad_inode;
-	}
-
-	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
-		if (fcb.i_data[0])
-			inode->i_rdev =
-				old_decode_dev(le32_to_cpu(fcb.i_data[0]));
-		else
-			inode->i_rdev =
-				new_decode_dev(le32_to_cpu(fcb.i_data[1]));
-	} else {
-		memcpy(oi->i_data, fcb.i_data, sizeof(fcb.i_data));
-	}
-
-	if (S_ISREG(inode->i_mode)) {
-		inode->i_op = &exofs_file_inode_operations;
-		inode->i_fop = &exofs_file_operations;
-		inode->i_mapping->a_ops = &exofs_aops;
-	} else if (S_ISDIR(inode->i_mode)) {
-		inode->i_op = &exofs_dir_inode_operations;
-		inode->i_fop = &exofs_dir_operations;
-		inode->i_mapping->a_ops = &exofs_aops;
-	} else if (S_ISLNK(inode->i_mode)) {
-		if (exofs_inode_is_fast_symlink(inode)) {
-			inode->i_op = &simple_symlink_inode_operations;
-			inode->i_link = (char *)oi->i_data;
-		} else {
-			inode->i_op = &page_symlink_inode_operations;
-			inode_nohighmem(inode);
-			inode->i_mapping->a_ops = &exofs_aops;
-		}
-	} else {
-		inode->i_op = &exofs_special_inode_operations;
-		if (fcb.i_data[0])
-			init_special_inode(inode, inode->i_mode,
-			   old_decode_dev(le32_to_cpu(fcb.i_data[0])));
-		else
-			init_special_inode(inode, inode->i_mode,
-			   new_decode_dev(le32_to_cpu(fcb.i_data[1])));
-	}
-
-	unlock_new_inode(inode);
-	return inode;
-
-bad_inode:
-	iget_failed(inode);
-	return ERR_PTR(ret);
-}
-
-int __exofs_wait_obj_created(struct exofs_i_info *oi)
-{
-	if (!obj_created(oi)) {
-		EXOFS_DBGMSG("!obj_created\n");
-		BUG_ON(!obj_2bcreated(oi));
-		wait_event(oi->i_wq, obj_created(oi));
-		EXOFS_DBGMSG("wait_event done\n");
-	}
-	return unlikely(is_bad_inode(&oi->vfs_inode)) ? -EIO : 0;
-}
-
-/*
- * Callback function from exofs_new_inode().  The important thing is that we
- * set the obj_created flag so that other methods know that the object exists on
- * the OSD.
- */
-static void create_done(struct ore_io_state *ios, void *p)
-{
-	struct inode *inode = p;
-	struct exofs_i_info *oi = exofs_i(inode);
-	struct exofs_sb_info *sbi = inode->i_sb->s_fs_info;
-	int ret;
-
-	ret = ore_check_io(ios, NULL);
-	ore_put_io_state(ios);
-
-	atomic_dec(&sbi->s_curr_pending);
-
-	if (unlikely(ret)) {
-		EXOFS_ERR("object=0x%llx creation failed in pid=0x%llx",
-			  _LLU(exofs_oi_objno(oi)),
-			  _LLU(oi->one_comp.obj.partition));
-		/*TODO: When FS is corrupted creation can fail, object already
-		 * exist. Get rid of this asynchronous creation, if exist
-		 * increment the obj counter and try the next object. Until we
-		 * succeed. All these dangling objects will be made into lost
-		 * files by chkfs.exofs
-		 */
-	}
-
-	set_obj_created(oi);
-
-	wake_up(&oi->i_wq);
-}
-
-/*
- * Set up a new inode and create an object for it on the OSD
- */
-struct inode *exofs_new_inode(struct inode *dir, umode_t mode)
-{
-	struct super_block *sb = dir->i_sb;
-	struct exofs_sb_info *sbi = sb->s_fs_info;
-	struct inode *inode;
-	struct exofs_i_info *oi;
-	struct ore_io_state *ios;
-	int ret;
-
-	inode = new_inode(sb);
-	if (!inode)
-		return ERR_PTR(-ENOMEM);
-
-	oi = exofs_i(inode);
-	__oi_init(oi);
-
-	set_obj_2bcreated(oi);
-
-	inode_init_owner(inode, dir, mode);
-	inode->i_ino = sbi->s_nextid++;
-	inode->i_blkbits = EXOFS_BLKSHIFT;
-	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
-	oi->i_commit_size = inode->i_size = 0;
-	spin_lock(&sbi->s_next_gen_lock);
-	inode->i_generation = sbi->s_next_generation++;
-	spin_unlock(&sbi->s_next_gen_lock);
-	insert_inode_hash(inode);
-
-	exofs_init_comps(&oi->oc, &oi->one_comp, sb->s_fs_info,
-			 exofs_oi_objno(oi));
-	exofs_sbi_write_stats(sbi); /* Make sure new sbi->s_nextid is on disk */
-
-	mark_inode_dirty(inode);
-
-	ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("exofs_new_inode: ore_get_io_state failed\n");
-		return ERR_PTR(ret);
-	}
-
-	ios->done = create_done;
-	ios->private = inode;
-
-	ret = ore_create(ios);
-	if (ret) {
-		ore_put_io_state(ios);
-		return ERR_PTR(ret);
-	}
-	atomic_inc(&sbi->s_curr_pending);
-
-	return inode;
-}
-
-/*
- * struct to pass two arguments to update_inode's callback
- */
-struct updatei_args {
-	struct exofs_sb_info	*sbi;
-	struct exofs_fcb	fcb;
-};
-
-/*
- * Callback function from exofs_update_inode().
- */
-static void updatei_done(struct ore_io_state *ios, void *p)
-{
-	struct updatei_args *args = p;
-
-	ore_put_io_state(ios);
-
-	atomic_dec(&args->sbi->s_curr_pending);
-
-	kfree(args);
-}
-
-/*
- * Write the inode to the OSD.  Just fill up the struct, and set the attribute
- * synchronously or asynchronously depending on the do_sync flag.
- */
-static int exofs_update_inode(struct inode *inode, int do_sync)
-{
-	struct exofs_i_info *oi = exofs_i(inode);
-	struct super_block *sb = inode->i_sb;
-	struct exofs_sb_info *sbi = sb->s_fs_info;
-	struct ore_io_state *ios;
-	struct osd_attr attr;
-	struct exofs_fcb *fcb;
-	struct updatei_args *args;
-	int ret;
-
-	args = kzalloc(sizeof(*args), GFP_KERNEL);
-	if (!args) {
-		EXOFS_DBGMSG("Failed kzalloc of args\n");
-		return -ENOMEM;
-	}
-
-	fcb = &args->fcb;
-
-	fcb->i_mode = cpu_to_le16(inode->i_mode);
-	fcb->i_uid = cpu_to_le32(i_uid_read(inode));
-	fcb->i_gid = cpu_to_le32(i_gid_read(inode));
-	fcb->i_links_count = cpu_to_le16(inode->i_nlink);
-	fcb->i_ctime = cpu_to_le32(inode->i_ctime.tv_sec);
-	fcb->i_atime = cpu_to_le32(inode->i_atime.tv_sec);
-	fcb->i_mtime = cpu_to_le32(inode->i_mtime.tv_sec);
-	oi->i_commit_size = i_size_read(inode);
-	fcb->i_size = cpu_to_le64(oi->i_commit_size);
-	fcb->i_generation = cpu_to_le32(inode->i_generation);
-
-	if (S_ISCHR(inode->i_mode) || S_ISBLK(inode->i_mode)) {
-		if (old_valid_dev(inode->i_rdev)) {
-			fcb->i_data[0] =
-				cpu_to_le32(old_encode_dev(inode->i_rdev));
-			fcb->i_data[1] = 0;
-		} else {
-			fcb->i_data[0] = 0;
-			fcb->i_data[1] =
-				cpu_to_le32(new_encode_dev(inode->i_rdev));
-			fcb->i_data[2] = 0;
-		}
-	} else
-		memcpy(fcb->i_data, oi->i_data, sizeof(fcb->i_data));
-
-	ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__);
-		goto free_args;
-	}
-
-	attr = g_attr_inode_data;
-	attr.val_ptr = fcb;
-	ios->out_attr_len = 1;
-	ios->out_attr = &attr;
-
-	wait_obj_created(oi);
-
-	if (!do_sync) {
-		args->sbi = sbi;
-		ios->done = updatei_done;
-		ios->private = args;
-	}
-
-	ret = ore_write(ios);
-	if (!do_sync && !ret) {
-		atomic_inc(&sbi->s_curr_pending);
-		goto out; /* deallocation in updatei_done */
-	}
-
-	ore_put_io_state(ios);
-free_args:
-	kfree(args);
-out:
-	EXOFS_DBGMSG("(0x%lx) do_sync=%d ret=>%d\n",
-		     inode->i_ino, do_sync, ret);
-	return ret;
-}
-
-int exofs_write_inode(struct inode *inode, struct writeback_control *wbc)
-{
-	/* FIXME: fix fsync and use wbc->sync_mode == WB_SYNC_ALL */
-	return exofs_update_inode(inode, 1);
-}
-
-/*
- * Callback function from exofs_delete_inode() - don't have much cleaning up to
- * do.
- */
-static void delete_done(struct ore_io_state *ios, void *p)
-{
-	struct exofs_sb_info *sbi = p;
-
-	ore_put_io_state(ios);
-
-	atomic_dec(&sbi->s_curr_pending);
-}
-
-/*
- * Called when the refcount of an inode reaches zero.  We remove the object
- * from the OSD here.  We make sure the object was created before we try and
- * delete it.
- */
-void exofs_evict_inode(struct inode *inode)
-{
-	struct exofs_i_info *oi = exofs_i(inode);
-	struct super_block *sb = inode->i_sb;
-	struct exofs_sb_info *sbi = sb->s_fs_info;
-	struct ore_io_state *ios;
-	int ret;
-
-	truncate_inode_pages_final(&inode->i_data);
-
-	/* TODO: should do better here */
-	if (inode->i_nlink || is_bad_inode(inode))
-		goto no_delete;
-
-	inode->i_size = 0;
-	clear_inode(inode);
-
-	/* if we are deleting an obj that hasn't been created yet, wait.
-	 * This also makes sure that create_done cannot be called with an
-	 * already evicted inode.
-	 */
-	wait_obj_created(oi);
-	/* ignore the error, attempt a remove anyway */
-
-	/* Now Remove the OSD objects */
-	ret = ore_get_io_state(&sbi->layout, &oi->oc, &ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("%s: ore_get_io_state failed\n", __func__);
-		return;
-	}
-
-	ios->done = delete_done;
-	ios->private = sbi;
-
-	ret = ore_remove(ios);
-	if (ret) {
-		EXOFS_ERR("%s: ore_remove failed\n", __func__);
-		ore_put_io_state(ios);
-		return;
-	}
-	atomic_inc(&sbi->s_curr_pending);
-
-	return;
-
-no_delete:
-	clear_inode(inode);
-}
diff --git a/fs/exofs/namei.c b/fs/exofs/namei.c
deleted file mode 100644
index 7295cd722770..000000000000
--- a/fs/exofs/namei.c
+++ /dev/null
@@ -1,323 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- *     Copyright (C) 1992, 1993, 1994, 1995
- *     Remy Card (card@masi.ibp.fr)
- *     Laboratoire MASI - Institut Blaise Pascal
- *     Universite Pierre et Marie Curie (Paris VI)
- *     from
- *     linux/fs/minix/inode.c
- *     Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include "exofs.h"
-
-static inline int exofs_add_nondir(struct dentry *dentry, struct inode *inode)
-{
-	int err = exofs_add_link(dentry, inode);
-	if (!err) {
-		d_instantiate(dentry, inode);
-		return 0;
-	}
-	inode_dec_link_count(inode);
-	iput(inode);
-	return err;
-}
-
-static struct dentry *exofs_lookup(struct inode *dir, struct dentry *dentry,
-				   unsigned int flags)
-{
-	struct inode *inode;
-	ino_t ino;
-
-	if (dentry->d_name.len > EXOFS_NAME_LEN)
-		return ERR_PTR(-ENAMETOOLONG);
-
-	ino = exofs_inode_by_name(dir, dentry);
-	inode = ino ? exofs_iget(dir->i_sb, ino) : NULL;
-	return d_splice_alias(inode, dentry);
-}
-
-static int exofs_create(struct inode *dir, struct dentry *dentry, umode_t mode,
-			 bool excl)
-{
-	struct inode *inode = exofs_new_inode(dir, mode);
-	int err = PTR_ERR(inode);
-	if (!IS_ERR(inode)) {
-		inode->i_op = &exofs_file_inode_operations;
-		inode->i_fop = &exofs_file_operations;
-		inode->i_mapping->a_ops = &exofs_aops;
-		mark_inode_dirty(inode);
-		err = exofs_add_nondir(dentry, inode);
-	}
-	return err;
-}
-
-static int exofs_mknod(struct inode *dir, struct dentry *dentry, umode_t mode,
-		       dev_t rdev)
-{
-	struct inode *inode;
-	int err;
-
-	inode = exofs_new_inode(dir, mode);
-	err = PTR_ERR(inode);
-	if (!IS_ERR(inode)) {
-		init_special_inode(inode, inode->i_mode, rdev);
-		mark_inode_dirty(inode);
-		err = exofs_add_nondir(dentry, inode);
-	}
-	return err;
-}
-
-static int exofs_symlink(struct inode *dir, struct dentry *dentry,
-			  const char *symname)
-{
-	struct super_block *sb = dir->i_sb;
-	int err = -ENAMETOOLONG;
-	unsigned l = strlen(symname)+1;
-	struct inode *inode;
-	struct exofs_i_info *oi;
-
-	if (l > sb->s_blocksize)
-		goto out;
-
-	inode = exofs_new_inode(dir, S_IFLNK | S_IRWXUGO);
-	err = PTR_ERR(inode);
-	if (IS_ERR(inode))
-		goto out;
-
-	oi = exofs_i(inode);
-	if (l > sizeof(oi->i_data)) {
-		/* slow symlink */
-		inode->i_op = &page_symlink_inode_operations;
-		inode_nohighmem(inode);
-		inode->i_mapping->a_ops = &exofs_aops;
-		memset(oi->i_data, 0, sizeof(oi->i_data));
-
-		err = page_symlink(inode, symname, l);
-		if (err)
-			goto out_fail;
-	} else {
-		/* fast symlink */
-		inode->i_op = &simple_symlink_inode_operations;
-		inode->i_link = (char *)oi->i_data;
-		memcpy(oi->i_data, symname, l);
-		inode->i_size = l-1;
-	}
-	mark_inode_dirty(inode);
-
-	err = exofs_add_nondir(dentry, inode);
-out:
-	return err;
-
-out_fail:
-	inode_dec_link_count(inode);
-	iput(inode);
-	goto out;
-}
-
-static int exofs_link(struct dentry *old_dentry, struct inode *dir,
-		struct dentry *dentry)
-{
-	struct inode *inode = d_inode(old_dentry);
-
-	inode->i_ctime = current_time(inode);
-	inode_inc_link_count(inode);
-	ihold(inode);
-
-	return exofs_add_nondir(dentry, inode);
-}
-
-static int exofs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
-{
-	struct inode *inode;
-	int err;
-
-	inode_inc_link_count(dir);
-
-	inode = exofs_new_inode(dir, S_IFDIR | mode);
-	err = PTR_ERR(inode);
-	if (IS_ERR(inode))
-		goto out_dir;
-
-	inode->i_op = &exofs_dir_inode_operations;
-	inode->i_fop = &exofs_dir_operations;
-	inode->i_mapping->a_ops = &exofs_aops;
-
-	inode_inc_link_count(inode);
-
-	err = exofs_make_empty(inode, dir);
-	if (err)
-		goto out_fail;
-
-	err = exofs_add_link(dentry, inode);
-	if (err)
-		goto out_fail;
-
-	d_instantiate(dentry, inode);
-out:
-	return err;
-
-out_fail:
-	inode_dec_link_count(inode);
-	inode_dec_link_count(inode);
-	iput(inode);
-out_dir:
-	inode_dec_link_count(dir);
-	goto out;
-}
-
-static int exofs_unlink(struct inode *dir, struct dentry *dentry)
-{
-	struct inode *inode = d_inode(dentry);
-	struct exofs_dir_entry *de;
-	struct page *page;
-	int err = -ENOENT;
-
-	de = exofs_find_entry(dir, dentry, &page);
-	if (!de)
-		goto out;
-
-	err = exofs_delete_entry(de, page);
-	if (err)
-		goto out;
-
-	inode->i_ctime = dir->i_ctime;
-	inode_dec_link_count(inode);
-	err = 0;
-out:
-	return err;
-}
-
-static int exofs_rmdir(struct inode *dir, struct dentry *dentry)
-{
-	struct inode *inode = d_inode(dentry);
-	int err = -ENOTEMPTY;
-
-	if (exofs_empty_dir(inode)) {
-		err = exofs_unlink(dir, dentry);
-		if (!err) {
-			inode->i_size = 0;
-			inode_dec_link_count(inode);
-			inode_dec_link_count(dir);
-		}
-	}
-	return err;
-}
-
-static int exofs_rename(struct inode *old_dir, struct dentry *old_dentry,
-			struct inode *new_dir, struct dentry *new_dentry,
-			unsigned int flags)
-{
-	struct inode *old_inode = d_inode(old_dentry);
-	struct inode *new_inode = d_inode(new_dentry);
-	struct page *dir_page = NULL;
-	struct exofs_dir_entry *dir_de = NULL;
-	struct page *old_page;
-	struct exofs_dir_entry *old_de;
-	int err = -ENOENT;
-
-	if (flags & ~RENAME_NOREPLACE)
-		return -EINVAL;
-
-	old_de = exofs_find_entry(old_dir, old_dentry, &old_page);
-	if (!old_de)
-		goto out;
-
-	if (S_ISDIR(old_inode->i_mode)) {
-		err = -EIO;
-		dir_de = exofs_dotdot(old_inode, &dir_page);
-		if (!dir_de)
-			goto out_old;
-	}
-
-	if (new_inode) {
-		struct page *new_page;
-		struct exofs_dir_entry *new_de;
-
-		err = -ENOTEMPTY;
-		if (dir_de && !exofs_empty_dir(new_inode))
-			goto out_dir;
-
-		err = -ENOENT;
-		new_de = exofs_find_entry(new_dir, new_dentry, &new_page);
-		if (!new_de)
-			goto out_dir;
-		err = exofs_set_link(new_dir, new_de, new_page, old_inode);
-		new_inode->i_ctime = current_time(new_inode);
-		if (dir_de)
-			drop_nlink(new_inode);
-		inode_dec_link_count(new_inode);
-		if (err)
-			goto out_dir;
-	} else {
-		err = exofs_add_link(new_dentry, old_inode);
-		if (err)
-			goto out_dir;
-		if (dir_de)
-			inode_inc_link_count(new_dir);
-	}
-
-	old_inode->i_ctime = current_time(old_inode);
-
-	exofs_delete_entry(old_de, old_page);
-	mark_inode_dirty(old_inode);
-
-	if (dir_de) {
-		err = exofs_set_link(old_inode, dir_de, dir_page, new_dir);
-		inode_dec_link_count(old_dir);
-		if (err)
-			goto out_dir;
-	}
-	return 0;
-
-
-out_dir:
-	if (dir_de) {
-		kunmap(dir_page);
-		put_page(dir_page);
-	}
-out_old:
-	kunmap(old_page);
-	put_page(old_page);
-out:
-	return err;
-}
-
-const struct inode_operations exofs_dir_inode_operations = {
-	.create 	= exofs_create,
-	.lookup 	= exofs_lookup,
-	.link   	= exofs_link,
-	.unlink 	= exofs_unlink,
-	.symlink	= exofs_symlink,
-	.mkdir  	= exofs_mkdir,
-	.rmdir  	= exofs_rmdir,
-	.mknod  	= exofs_mknod,
-	.rename		= exofs_rename,
-	.setattr	= exofs_setattr,
-};
-
-const struct inode_operations exofs_special_inode_operations = {
-	.setattr	= exofs_setattr,
-};
diff --git a/fs/exofs/ore.c b/fs/exofs/ore.c
deleted file mode 100644
index 5331a15a61f1..000000000000
--- a/fs/exofs/ore.c
+++ /dev/null
@@ -1,1178 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/slab.h>
-#include <linux/module.h>
-#include <asm/div64.h>
-#include <linux/lcm.h>
-
-#include "ore_raid.h"
-
-MODULE_AUTHOR("Boaz Harrosh <ooo@electrozaur.com>");
-MODULE_DESCRIPTION("Objects Raid Engine ore.ko");
-MODULE_LICENSE("GPL");
-
-/* ore_verify_layout does a couple of things:
- * 1. Given a minimum number of needed parameters fixes up the rest of the
- *    members to be operatonals for the ore. The needed parameters are those
- *    that are defined by the pnfs-objects layout STD.
- * 2. Check to see if the current ore code actually supports these parameters
- *    for example stripe_unit must be a multple of the system PAGE_SIZE,
- *    and etc...
- * 3. Cache some havily used calculations that will be needed by users.
- */
-
-enum { BIO_MAX_PAGES_KMALLOC =
-		(PAGE_SIZE - sizeof(struct bio)) / sizeof(struct bio_vec),};
-
-int ore_verify_layout(unsigned total_comps, struct ore_layout *layout)
-{
-	u64 stripe_length;
-
-	switch (layout->raid_algorithm) {
-	case PNFS_OSD_RAID_0:
-		layout->parity = 0;
-		break;
-	case PNFS_OSD_RAID_5:
-		layout->parity = 1;
-		break;
-	case PNFS_OSD_RAID_PQ:
-		layout->parity = 2;
-		break;
-	case PNFS_OSD_RAID_4:
-	default:
-		ORE_ERR("Only RAID_0/5/6 for now received-enum=%d\n",
-			layout->raid_algorithm);
-		return -EINVAL;
-	}
-	if (0 != (layout->stripe_unit & ~PAGE_MASK)) {
-		ORE_ERR("Stripe Unit(0x%llx)"
-			  " must be Multples of PAGE_SIZE(0x%lx)\n",
-			  _LLU(layout->stripe_unit), PAGE_SIZE);
-		return -EINVAL;
-	}
-	if (layout->group_width) {
-		if (!layout->group_depth) {
-			ORE_ERR("group_depth == 0 && group_width != 0\n");
-			return -EINVAL;
-		}
-		if (total_comps < (layout->group_width * layout->mirrors_p1)) {
-			ORE_ERR("Data Map wrong, "
-				"numdevs=%d < group_width=%d * mirrors=%d\n",
-				total_comps, layout->group_width,
-				layout->mirrors_p1);
-			return -EINVAL;
-		}
-		layout->group_count = total_comps / layout->mirrors_p1 /
-						layout->group_width;
-	} else {
-		if (layout->group_depth) {
-			printk(KERN_NOTICE "Warning: group_depth ignored "
-				"group_width == 0 && group_depth == %lld\n",
-				_LLU(layout->group_depth));
-		}
-		layout->group_width = total_comps / layout->mirrors_p1;
-		layout->group_depth = -1;
-		layout->group_count = 1;
-	}
-
-	stripe_length = (u64)layout->group_width * layout->stripe_unit;
-	if (stripe_length >= (1ULL << 32)) {
-		ORE_ERR("Stripe_length(0x%llx) >= 32bit is not supported\n",
-			_LLU(stripe_length));
-		return -EINVAL;
-	}
-
-	layout->max_io_length =
-		(BIO_MAX_PAGES_KMALLOC * PAGE_SIZE - layout->stripe_unit) *
-					(layout->group_width - layout->parity);
-	if (layout->parity) {
-		unsigned stripe_length =
-				(layout->group_width - layout->parity) *
-				layout->stripe_unit;
-
-		layout->max_io_length /= stripe_length;
-		layout->max_io_length *= stripe_length;
-	}
-	ORE_DBGMSG("max_io_length=0x%lx\n", layout->max_io_length);
-
-	return 0;
-}
-EXPORT_SYMBOL(ore_verify_layout);
-
-static u8 *_ios_cred(struct ore_io_state *ios, unsigned index)
-{
-	return ios->oc->comps[index & ios->oc->single_comp].cred;
-}
-
-static struct osd_obj_id *_ios_obj(struct ore_io_state *ios, unsigned index)
-{
-	return &ios->oc->comps[index & ios->oc->single_comp].obj;
-}
-
-static struct osd_dev *_ios_od(struct ore_io_state *ios, unsigned index)
-{
-	ORE_DBGMSG2("oc->first_dev=%d oc->numdevs=%d i=%d oc->ods=%p\n",
-		    ios->oc->first_dev, ios->oc->numdevs, index,
-		    ios->oc->ods);
-
-	return ore_comp_dev(ios->oc, index);
-}
-
-int  _ore_get_io_state(struct ore_layout *layout,
-			struct ore_components *oc, unsigned numdevs,
-			unsigned sgs_per_dev, unsigned num_par_pages,
-			struct ore_io_state **pios)
-{
-	struct ore_io_state *ios;
-	size_t size_ios, size_extra, size_total;
-	void *ios_extra;
-
-	/*
-	 * The desired layout looks like this, with the extra_allocation
-	 * items pointed at from fields within ios or per_dev:
-
-	struct __alloc_all_io_state {
-		struct ore_io_state ios;
-		struct ore_per_dev_state per_dev[numdevs];
-		union {
-			struct osd_sg_entry sglist[sgs_per_dev * numdevs];
-			struct page *pages[num_par_pages];
-		} extra_allocation;
-	} whole_allocation;
-
-	*/
-
-	/* This should never happen, so abort early if it ever does. */
-	if (sgs_per_dev && num_par_pages) {
-		ORE_DBGMSG("Tried to use both pages and sglist\n");
-		*pios = NULL;
-		return -EINVAL;
-	}
-
-	if (numdevs > (INT_MAX - sizeof(*ios)) /
-		       sizeof(struct ore_per_dev_state))
-		return -ENOMEM;
-	size_ios = sizeof(*ios) + sizeof(struct ore_per_dev_state) * numdevs;
-
-	if (sgs_per_dev * numdevs > INT_MAX / sizeof(struct osd_sg_entry))
-		return -ENOMEM;
-	if (num_par_pages > INT_MAX / sizeof(struct page *))
-		return -ENOMEM;
-	size_extra = max(sizeof(struct osd_sg_entry) * (sgs_per_dev * numdevs),
-			 sizeof(struct page *) * num_par_pages);
-
-	size_total = size_ios + size_extra;
-
-	if (likely(size_total <= PAGE_SIZE)) {
-		ios = kzalloc(size_total, GFP_KERNEL);
-		if (unlikely(!ios)) {
-			ORE_DBGMSG("Failed kzalloc bytes=%zd\n", size_total);
-			*pios = NULL;
-			return -ENOMEM;
-		}
-		ios_extra = (char *)ios + size_ios;
-	} else {
-		ios = kzalloc(size_ios, GFP_KERNEL);
-		if (unlikely(!ios)) {
-			ORE_DBGMSG("Failed alloc first part bytes=%zd\n",
-				   size_ios);
-			*pios = NULL;
-			return -ENOMEM;
-		}
-		ios_extra = kzalloc(size_extra, GFP_KERNEL);
-		if (unlikely(!ios_extra)) {
-			ORE_DBGMSG("Failed alloc second part bytes=%zd\n",
-				   size_extra);
-			kfree(ios);
-			*pios = NULL;
-			return -ENOMEM;
-		}
-
-		/* In this case the per_dev[0].sgilist holds the pointer to
-		 * be freed
-		 */
-		ios->extra_part_alloc = true;
-	}
-
-	if (num_par_pages) {
-		ios->parity_pages = ios_extra;
-		ios->max_par_pages = num_par_pages;
-	}
-	if (sgs_per_dev) {
-		struct osd_sg_entry *sgilist = ios_extra;
-		unsigned d;
-
-		for (d = 0; d < numdevs; ++d) {
-			ios->per_dev[d].sglist = sgilist;
-			sgilist += sgs_per_dev;
-		}
-		ios->sgs_per_dev = sgs_per_dev;
-	}
-
-	ios->layout = layout;
-	ios->oc = oc;
-	*pios = ios;
-	return 0;
-}
-
-/* Allocate an io_state for only a single group of devices
- *
- * If a user needs to call ore_read/write() this version must be used becase it
- * allocates extra stuff for striping and raid.
- * The ore might decide to only IO less then @length bytes do to alignmets
- * and constrains as follows:
- * - The IO cannot cross group boundary.
- * - In raid5/6 The end of the IO must align at end of a stripe eg.
- *   (@offset + @length) % strip_size == 0. Or the complete range is within a
- *   single stripe.
- * - Memory condition only permitted a shorter IO. (A user can use @length=~0
- *   And check the returned ios->length for max_io_size.)
- *
- * The caller must check returned ios->length (and/or ios->nr_pages) and
- * re-issue these pages that fall outside of ios->length
- */
-int  ore_get_rw_state(struct ore_layout *layout, struct ore_components *oc,
-		      bool is_reading, u64 offset, u64 length,
-		      struct ore_io_state **pios)
-{
-	struct ore_io_state *ios;
-	unsigned numdevs = layout->group_width * layout->mirrors_p1;
-	unsigned sgs_per_dev = 0, max_par_pages = 0;
-	int ret;
-
-	if (layout->parity && length) {
-		unsigned data_devs = layout->group_width - layout->parity;
-		unsigned stripe_size = layout->stripe_unit * data_devs;
-		unsigned pages_in_unit = layout->stripe_unit / PAGE_SIZE;
-		u32 remainder;
-		u64 num_stripes;
-		u64 num_raid_units;
-
-		num_stripes = div_u64_rem(length, stripe_size, &remainder);
-		if (remainder)
-			++num_stripes;
-
-		num_raid_units =  num_stripes * layout->parity;
-
-		if (is_reading) {
-			/* For reads add per_dev sglist array */
-			/* TODO: Raid 6 we need twice more. Actually:
-			*         num_stripes / LCMdP(W,P);
-			*         if (W%P != 0) num_stripes *= parity;
-			*/
-
-			/* first/last seg is split */
-			num_raid_units += layout->group_width;
-			sgs_per_dev = div_u64(num_raid_units, data_devs) + 2;
-		} else {
-			/* For Writes add parity pages array. */
-			max_par_pages = num_raid_units * pages_in_unit *
-						sizeof(struct page *);
-		}
-	}
-
-	ret = _ore_get_io_state(layout, oc, numdevs, sgs_per_dev, max_par_pages,
-				pios);
-	if (unlikely(ret))
-		return ret;
-
-	ios = *pios;
-	ios->reading = is_reading;
-	ios->offset = offset;
-
-	if (length) {
-		ore_calc_stripe_info(layout, offset, length, &ios->si);
-		ios->length = ios->si.length;
-		ios->nr_pages = ((ios->offset & (PAGE_SIZE - 1)) +
-				 ios->length + PAGE_SIZE - 1) / PAGE_SIZE;
-		if (layout->parity)
-			_ore_post_alloc_raid_stuff(ios);
-	}
-
-	return 0;
-}
-EXPORT_SYMBOL(ore_get_rw_state);
-
-/* Allocate an io_state for all the devices in the comps array
- *
- * This version of io_state allocation is used mostly by create/remove
- * and trunc where we currently need all the devices. The only wastful
- * bit is the read/write_attributes with no IO. Those sites should
- * be converted to use ore_get_rw_state() with length=0
- */
-int  ore_get_io_state(struct ore_layout *layout, struct ore_components *oc,
-		      struct ore_io_state **pios)
-{
-	return _ore_get_io_state(layout, oc, oc->numdevs, 0, 0, pios);
-}
-EXPORT_SYMBOL(ore_get_io_state);
-
-void ore_put_io_state(struct ore_io_state *ios)
-{
-	if (ios) {
-		unsigned i;
-
-		for (i = 0; i < ios->numdevs; i++) {
-			struct ore_per_dev_state *per_dev = &ios->per_dev[i];
-
-			if (per_dev->or)
-				osd_end_request(per_dev->or);
-			if (per_dev->bio)
-				bio_put(per_dev->bio);
-		}
-
-		_ore_free_raid_stuff(ios);
-		kfree(ios);
-	}
-}
-EXPORT_SYMBOL(ore_put_io_state);
-
-static void _sync_done(struct ore_io_state *ios, void *p)
-{
-	struct completion *waiting = p;
-
-	complete(waiting);
-}
-
-static void _last_io(struct kref *kref)
-{
-	struct ore_io_state *ios = container_of(
-					kref, struct ore_io_state, kref);
-
-	ios->done(ios, ios->private);
-}
-
-static void _done_io(struct osd_request *or, void *p)
-{
-	struct ore_io_state *ios = p;
-
-	kref_put(&ios->kref, _last_io);
-}
-
-int ore_io_execute(struct ore_io_state *ios)
-{
-	DECLARE_COMPLETION_ONSTACK(wait);
-	bool sync = (ios->done == NULL);
-	int i, ret;
-
-	if (sync) {
-		ios->done = _sync_done;
-		ios->private = &wait;
-	}
-
-	for (i = 0; i < ios->numdevs; i++) {
-		struct osd_request *or = ios->per_dev[i].or;
-		if (unlikely(!or))
-			continue;
-
-		ret = osd_finalize_request(or, 0, _ios_cred(ios, i), NULL);
-		if (unlikely(ret)) {
-			ORE_DBGMSG("Failed to osd_finalize_request() => %d\n",
-				     ret);
-			return ret;
-		}
-	}
-
-	kref_init(&ios->kref);
-
-	for (i = 0; i < ios->numdevs; i++) {
-		struct osd_request *or = ios->per_dev[i].or;
-		if (unlikely(!or))
-			continue;
-
-		kref_get(&ios->kref);
-		osd_execute_request_async(or, _done_io, ios);
-	}
-
-	kref_put(&ios->kref, _last_io);
-	ret = 0;
-
-	if (sync) {
-		wait_for_completion(&wait);
-		ret = ore_check_io(ios, NULL);
-	}
-	return ret;
-}
-
-static void _clear_bio(struct bio *bio)
-{
-	struct bio_vec *bv;
-	unsigned i;
-
-	bio_for_each_segment_all(bv, bio, i) {
-		unsigned this_count = bv->bv_len;
-
-		if (likely(PAGE_SIZE == this_count))
-			clear_highpage(bv->bv_page);
-		else
-			zero_user(bv->bv_page, bv->bv_offset, this_count);
-	}
-}
-
-int ore_check_io(struct ore_io_state *ios, ore_on_dev_error on_dev_error)
-{
-	enum osd_err_priority acumulated_osd_err = 0;
-	int acumulated_lin_err = 0;
-	int i;
-
-	for (i = 0; i < ios->numdevs; i++) {
-		struct osd_sense_info osi;
-		struct ore_per_dev_state *per_dev = &ios->per_dev[i];
-		struct osd_request *or = per_dev->or;
-		int ret;
-
-		if (unlikely(!or))
-			continue;
-
-		ret = osd_req_decode_sense(or, &osi);
-		if (likely(!ret))
-			continue;
-
-		if ((OSD_ERR_PRI_CLEAR_PAGES == osi.osd_err_pri) &&
-		    per_dev->bio) {
-			/* start read offset passed endof file.
-			 * Note: if we do not have bio it means read-attributes
-			 * In this case we should return error to caller.
-			 */
-			_clear_bio(per_dev->bio);
-			ORE_DBGMSG("start read offset passed end of file "
-				"offset=0x%llx, length=0x%llx\n",
-				_LLU(per_dev->offset),
-				_LLU(per_dev->length));
-
-			continue; /* we recovered */
-		}
-
-		if (on_dev_error) {
-			u64 residual = ios->reading ?
-					or->in.residual : or->out.residual;
-			u64 offset = (ios->offset + ios->length) - residual;
-			unsigned dev = per_dev->dev - ios->oc->first_dev;
-			struct ore_dev *od = ios->oc->ods[dev];
-
-			on_dev_error(ios, od, dev, osi.osd_err_pri,
-				     offset, residual);
-		}
-		if (osi.osd_err_pri >= acumulated_osd_err) {
-			acumulated_osd_err = osi.osd_err_pri;
-			acumulated_lin_err = ret;
-		}
-	}
-
-	return acumulated_lin_err;
-}
-EXPORT_SYMBOL(ore_check_io);
-
-/*
- * L - logical offset into the file
- *
- * D - number of Data devices
- *	D = group_width - parity
- *
- * U - The number of bytes in a stripe within a group
- *	U =  stripe_unit * D
- *
- * T - The number of bytes striped within a group of component objects
- *     (before advancing to the next group)
- *	T = U * group_depth
- *
- * S - The number of bytes striped across all component objects
- *     before the pattern repeats
- *	S = T * group_count
- *
- * M - The "major" (i.e., across all components) cycle number
- *	M = L / S
- *
- * G - Counts the groups from the beginning of the major cycle
- *	G = (L - (M * S)) / T	[or (L % S) / T]
- *
- * H - The byte offset within the group
- *	H = (L - (M * S)) % T	[or (L % S) % T]
- *
- * N - The "minor" (i.e., across the group) stripe number
- *	N = H / U
- *
- * C - The component index coresponding to L
- *
- *	C = (H - (N * U)) / stripe_unit + G * D
- *	[or (L % U) / stripe_unit + G * D]
- *
- * O - The component offset coresponding to L
- *	O = L % stripe_unit + N * stripe_unit + M * group_depth * stripe_unit
- *
- * LCMdP – Parity cycle: Lowest Common Multiple of group_width, parity
- *          divide by parity
- *	LCMdP = lcm(group_width, parity) / parity
- *
- * R - The parity Rotation stripe
- *     (Note parity cycle always starts at a group's boundary)
- *	R = N % LCMdP
- *
- * I = the first parity device index
- *	I = (group_width + group_width - R*parity - parity) % group_width
- *
- * Craid - The component index Rotated
- *	Craid = (group_width + C - R*parity) % group_width
- *      (We add the group_width to avoid negative numbers modulo math)
- */
-void ore_calc_stripe_info(struct ore_layout *layout, u64 file_offset,
-			  u64 length, struct ore_striping_info *si)
-{
-	u32	stripe_unit = layout->stripe_unit;
-	u32	group_width = layout->group_width;
-	u64	group_depth = layout->group_depth;
-	u32	parity      = layout->parity;
-
-	u32	D = group_width - parity;
-	u32	U = D * stripe_unit;
-	u64	T = U * group_depth;
-	u64	S = T * layout->group_count;
-	u64	M = div64_u64(file_offset, S);
-
-	/*
-	G = (L - (M * S)) / T
-	H = (L - (M * S)) % T
-	*/
-	u64	LmodS = file_offset - M * S;
-	u32	G = div64_u64(LmodS, T);
-	u64	H = LmodS - G * T;
-
-	u32	N = div_u64(H, U);
-	u32	Nlast;
-
-	/* "H - (N * U)" is just "H % U" so it's bound to u32 */
-	u32	C = (u32)(H - (N * U)) / stripe_unit + G * group_width;
-	u32 first_dev = C - C % group_width;
-
-	div_u64_rem(file_offset, stripe_unit, &si->unit_off);
-
-	si->obj_offset = si->unit_off + (N * stripe_unit) +
-				  (M * group_depth * stripe_unit);
-	si->cur_comp = C - first_dev;
-	si->cur_pg = si->unit_off / PAGE_SIZE;
-
-	if (parity) {
-		u32 LCMdP = lcm(group_width, parity) / parity;
-		/* R     = N % LCMdP; */
-		u32 RxP   = (N % LCMdP) * parity;
-
-		si->par_dev = (group_width + group_width - parity - RxP) %
-			      group_width + first_dev;
-		si->dev = (group_width + group_width + C - RxP) %
-			  group_width + first_dev;
-		si->bytes_in_stripe = U;
-		si->first_stripe_start = M * S + G * T + N * U;
-	} else {
-		/* Make the math correct see _prepare_one_group */
-		si->par_dev = group_width;
-		si->dev = C;
-	}
-
-	si->dev *= layout->mirrors_p1;
-	si->par_dev *= layout->mirrors_p1;
-	si->offset = file_offset;
-	si->length = T - H;
-	if (si->length > length)
-		si->length = length;
-
-	Nlast = div_u64(H + si->length + U - 1, U);
-	si->maxdevUnits = Nlast - N;
-
-	si->M = M;
-}
-EXPORT_SYMBOL(ore_calc_stripe_info);
-
-int _ore_add_stripe_unit(struct ore_io_state *ios,  unsigned *cur_pg,
-			 unsigned pgbase, struct page **pages,
-			 struct ore_per_dev_state *per_dev, int cur_len)
-{
-	unsigned pg = *cur_pg;
-	struct request_queue *q =
-			osd_request_queue(_ios_od(ios, per_dev->dev));
-	unsigned len = cur_len;
-	int ret;
-
-	if (per_dev->bio == NULL) {
-		unsigned bio_size;
-
-		if (!ios->reading) {
-			bio_size = ios->si.maxdevUnits;
-		} else {
-			bio_size = (ios->si.maxdevUnits + 1) *
-			     (ios->layout->group_width - ios->layout->parity) /
-			     ios->layout->group_width;
-		}
-		bio_size *= (ios->layout->stripe_unit / PAGE_SIZE);
-
-		per_dev->bio = bio_kmalloc(GFP_KERNEL, bio_size);
-		if (unlikely(!per_dev->bio)) {
-			ORE_DBGMSG("Failed to allocate BIO size=%u\n",
-				     bio_size);
-			ret = -ENOMEM;
-			goto out;
-		}
-	}
-
-	while (cur_len > 0) {
-		unsigned pglen = min_t(unsigned, PAGE_SIZE - pgbase, cur_len);
-		unsigned added_len;
-
-		cur_len -= pglen;
-
-		added_len = bio_add_pc_page(q, per_dev->bio, pages[pg],
-					    pglen, pgbase);
-		if (unlikely(pglen != added_len)) {
-			/* If bi_vcnt == bi_max then this is a SW BUG */
-			ORE_DBGMSG("Failed bio_add_pc_page bi_vcnt=0x%x "
-				   "bi_max=0x%x BIO_MAX=0x%x cur_len=0x%x\n",
-				   per_dev->bio->bi_vcnt,
-				   per_dev->bio->bi_max_vecs,
-				   BIO_MAX_PAGES_KMALLOC, cur_len);
-			ret = -ENOMEM;
-			goto out;
-		}
-		_add_stripe_page(ios->sp2d, &ios->si, pages[pg]);
-
-		pgbase = 0;
-		++pg;
-	}
-	BUG_ON(cur_len);
-
-	per_dev->length += len;
-	*cur_pg = pg;
-	ret = 0;
-out:	/* we fail the complete unit on an error eg don't advance
-	 * per_dev->length and cur_pg. This means that we might have a bigger
-	 * bio than the CDB requested length (per_dev->length). That's fine
-	 * only the oposite is fatal.
-	 */
-	return ret;
-}
-
-static int _add_parity_units(struct ore_io_state *ios,
-			     struct ore_striping_info *si,
-			     unsigned dev, unsigned first_dev,
-			     unsigned mirrors_p1, unsigned devs_in_group,
-			     unsigned cur_len)
-{
-	unsigned do_parity;
-	int ret = 0;
-
-	for (do_parity = ios->layout->parity; do_parity; --do_parity) {
-		struct ore_per_dev_state *per_dev;
-
-		per_dev = &ios->per_dev[dev - first_dev];
-		if (!per_dev->length && !per_dev->offset) {
-			/* Only/always the parity unit of the first
-			 * stripe will be empty. So this is a chance to
-			 * initialize the per_dev info.
-			 */
-			per_dev->dev = dev;
-			per_dev->offset = si->obj_offset - si->unit_off;
-		}
-
-		ret = _ore_add_parity_unit(ios, si, per_dev, cur_len,
-					   do_parity == 1);
-		if (unlikely(ret))
-				break;
-
-		if (do_parity != 1) {
-			dev = ((dev + mirrors_p1) % devs_in_group) + first_dev;
-			si->cur_comp = (si->cur_comp + 1) %
-						       ios->layout->group_width;
-		}
-	}
-
-	return ret;
-}
-
-static int _prepare_for_striping(struct ore_io_state *ios)
-{
-	struct ore_striping_info *si = &ios->si;
-	unsigned stripe_unit = ios->layout->stripe_unit;
-	unsigned mirrors_p1 = ios->layout->mirrors_p1;
-	unsigned group_width = ios->layout->group_width;
-	unsigned devs_in_group = group_width * mirrors_p1;
-	unsigned dev = si->dev;
-	unsigned first_dev = dev - (dev % devs_in_group);
-	unsigned cur_pg = ios->pages_consumed;
-	u64 length = ios->length;
-	int ret = 0;
-
-	if (!ios->pages) {
-		ios->numdevs = ios->layout->mirrors_p1;
-		return 0;
-	}
-
-	BUG_ON(length > si->length);
-
-	while (length) {
-		struct ore_per_dev_state *per_dev =
-						&ios->per_dev[dev - first_dev];
-		unsigned cur_len, page_off = 0;
-
-		if (!per_dev->length && !per_dev->offset) {
-			/* First time initialize the per_dev info. */
-			per_dev->dev = dev;
-			if (dev == si->dev) {
-				WARN_ON(dev == si->par_dev);
-				per_dev->offset = si->obj_offset;
-				cur_len = stripe_unit - si->unit_off;
-				page_off = si->unit_off & ~PAGE_MASK;
-				BUG_ON(page_off && (page_off != ios->pgbase));
-			} else {
-				per_dev->offset = si->obj_offset - si->unit_off;
-				cur_len = stripe_unit;
-			}
-		} else {
-			cur_len = stripe_unit;
-		}
-		if (cur_len >= length)
-			cur_len = length;
-
-		ret = _ore_add_stripe_unit(ios, &cur_pg, page_off, ios->pages,
-					   per_dev, cur_len);
-		if (unlikely(ret))
-			goto out;
-
-		length -= cur_len;
-
-		dev = ((dev + mirrors_p1) % devs_in_group) + first_dev;
-		si->cur_comp = (si->cur_comp + 1) % group_width;
-		if (unlikely((dev == si->par_dev) || (!length && ios->sp2d))) {
-			if (!length && ios->sp2d) {
-				/* If we are writing and this is the very last
-				 * stripe. then operate on parity dev.
-				 */
-				dev = si->par_dev;
-				/* If last stripe operate on parity comp */
-				si->cur_comp = group_width - ios->layout->parity;
-			}
-
-			/* In writes cur_len just means if it's the
-			 * last one. See _ore_add_parity_unit.
-			 */
-			ret = _add_parity_units(ios, si, dev, first_dev,
-						mirrors_p1, devs_in_group,
-						ios->sp2d ? length : cur_len);
-			if (unlikely(ret))
-					goto out;
-
-			/* Rotate next par_dev backwards with wraping */
-			si->par_dev = (devs_in_group + si->par_dev -
-				       ios->layout->parity * mirrors_p1) %
-				      devs_in_group + first_dev;
-			/* Next stripe, start fresh */
-			si->cur_comp = 0;
-			si->cur_pg = 0;
-			si->obj_offset += cur_len;
-			si->unit_off = 0;
-		}
-	}
-out:
-	ios->numdevs = devs_in_group;
-	ios->pages_consumed = cur_pg;
-	return ret;
-}
-
-int ore_create(struct ore_io_state *ios)
-{
-	int i, ret;
-
-	for (i = 0; i < ios->oc->numdevs; i++) {
-		struct osd_request *or;
-
-		or = osd_start_request(_ios_od(ios, i));
-		if (unlikely(!or)) {
-			ORE_ERR("%s: osd_start_request failed\n", __func__);
-			ret = -ENOMEM;
-			goto out;
-		}
-		ios->per_dev[i].or = or;
-		ios->numdevs++;
-
-		osd_req_create_object(or, _ios_obj(ios, i));
-	}
-	ret = ore_io_execute(ios);
-
-out:
-	return ret;
-}
-EXPORT_SYMBOL(ore_create);
-
-int ore_remove(struct ore_io_state *ios)
-{
-	int i, ret;
-
-	for (i = 0; i < ios->oc->numdevs; i++) {
-		struct osd_request *or;
-
-		or = osd_start_request(_ios_od(ios, i));
-		if (unlikely(!or)) {
-			ORE_ERR("%s: osd_start_request failed\n", __func__);
-			ret = -ENOMEM;
-			goto out;
-		}
-		ios->per_dev[i].or = or;
-		ios->numdevs++;
-
-		osd_req_remove_object(or, _ios_obj(ios, i));
-	}
-	ret = ore_io_execute(ios);
-
-out:
-	return ret;
-}
-EXPORT_SYMBOL(ore_remove);
-
-static int _write_mirror(struct ore_io_state *ios, int cur_comp)
-{
-	struct ore_per_dev_state *master_dev = &ios->per_dev[cur_comp];
-	unsigned dev = ios->per_dev[cur_comp].dev;
-	unsigned last_comp = cur_comp + ios->layout->mirrors_p1;
-	int ret = 0;
-
-	if (ios->pages && !master_dev->length)
-		return 0; /* Just an empty slot */
-
-	for (; cur_comp < last_comp; ++cur_comp, ++dev) {
-		struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp];
-		struct osd_request *or;
-
-		or = osd_start_request(_ios_od(ios, dev));
-		if (unlikely(!or)) {
-			ORE_ERR("%s: osd_start_request failed\n", __func__);
-			ret = -ENOMEM;
-			goto out;
-		}
-		per_dev->or = or;
-
-		if (ios->pages) {
-			struct bio *bio;
-
-			if (per_dev != master_dev) {
-				bio = bio_clone_fast(master_dev->bio,
-						     GFP_KERNEL, NULL);
-				if (unlikely(!bio)) {
-					ORE_DBGMSG(
-					      "Failed to allocate BIO size=%u\n",
-					      master_dev->bio->bi_max_vecs);
-					ret = -ENOMEM;
-					goto out;
-				}
-
-				bio->bi_disk = NULL;
-				bio->bi_next = NULL;
-				per_dev->offset = master_dev->offset;
-				per_dev->length = master_dev->length;
-				per_dev->bio =  bio;
-				per_dev->dev = dev;
-			} else {
-				bio = master_dev->bio;
-				/* FIXME: bio_set_dir() */
-				bio_set_op_attrs(bio, REQ_OP_WRITE, 0);
-			}
-
-			osd_req_write(or, _ios_obj(ios, cur_comp),
-				      per_dev->offset, bio, per_dev->length);
-			ORE_DBGMSG("write(0x%llx) offset=0x%llx "
-				      "length=0x%llx dev=%d\n",
-				     _LLU(_ios_obj(ios, cur_comp)->id),
-				     _LLU(per_dev->offset),
-				     _LLU(per_dev->length), dev);
-		} else if (ios->kern_buff) {
-			per_dev->offset = ios->si.obj_offset;
-			per_dev->dev = ios->si.dev + dev;
-
-			/* no cross device without page array */
-			BUG_ON((ios->layout->group_width > 1) &&
-			       (ios->si.unit_off + ios->length >
-				ios->layout->stripe_unit));
-
-			ret = osd_req_write_kern(or, _ios_obj(ios, cur_comp),
-						 per_dev->offset,
-						 ios->kern_buff, ios->length);
-			if (unlikely(ret))
-				goto out;
-			ORE_DBGMSG2("write_kern(0x%llx) offset=0x%llx "
-				      "length=0x%llx dev=%d\n",
-				     _LLU(_ios_obj(ios, cur_comp)->id),
-				     _LLU(per_dev->offset),
-				     _LLU(ios->length), per_dev->dev);
-		} else {
-			osd_req_set_attributes(or, _ios_obj(ios, cur_comp));
-			ORE_DBGMSG2("obj(0x%llx) set_attributes=%d dev=%d\n",
-				     _LLU(_ios_obj(ios, cur_comp)->id),
-				     ios->out_attr_len, dev);
-		}
-
-		if (ios->out_attr)
-			osd_req_add_set_attr_list(or, ios->out_attr,
-						  ios->out_attr_len);
-
-		if (ios->in_attr)
-			osd_req_add_get_attr_list(or, ios->in_attr,
-						  ios->in_attr_len);
-	}
-
-out:
-	return ret;
-}
-
-int ore_write(struct ore_io_state *ios)
-{
-	int i;
-	int ret;
-
-	if (unlikely(ios->sp2d && !ios->r4w)) {
-		/* A library is attempting a RAID-write without providing
-		 * a pages lock interface.
-		 */
-		WARN_ON_ONCE(1);
-		return -ENOTSUPP;
-	}
-
-	ret = _prepare_for_striping(ios);
-	if (unlikely(ret))
-		return ret;
-
-	for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
-		ret = _write_mirror(ios, i);
-		if (unlikely(ret))
-			return ret;
-	}
-
-	ret = ore_io_execute(ios);
-	return ret;
-}
-EXPORT_SYMBOL(ore_write);
-
-int _ore_read_mirror(struct ore_io_state *ios, unsigned cur_comp)
-{
-	struct osd_request *or;
-	struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp];
-	struct osd_obj_id *obj = _ios_obj(ios, cur_comp);
-	unsigned first_dev = (unsigned)obj->id;
-
-	if (ios->pages && !per_dev->length)
-		return 0; /* Just an empty slot */
-
-	first_dev = per_dev->dev + first_dev % ios->layout->mirrors_p1;
-	or = osd_start_request(_ios_od(ios, first_dev));
-	if (unlikely(!or)) {
-		ORE_ERR("%s: osd_start_request failed\n", __func__);
-		return -ENOMEM;
-	}
-	per_dev->or = or;
-
-	if (ios->pages) {
-		if (per_dev->cur_sg) {
-			/* finalize the last sg_entry */
-			_ore_add_sg_seg(per_dev, 0, false);
-			if (unlikely(!per_dev->cur_sg))
-				return 0; /* Skip parity only device */
-
-			osd_req_read_sg(or, obj, per_dev->bio,
-					per_dev->sglist, per_dev->cur_sg);
-		} else {
-			/* The no raid case */
-			osd_req_read(or, obj, per_dev->offset,
-				     per_dev->bio, per_dev->length);
-		}
-
-		ORE_DBGMSG("read(0x%llx) offset=0x%llx length=0x%llx"
-			     " dev=%d sg_len=%d\n", _LLU(obj->id),
-			     _LLU(per_dev->offset), _LLU(per_dev->length),
-			     first_dev, per_dev->cur_sg);
-	} else {
-		BUG_ON(ios->kern_buff);
-
-		osd_req_get_attributes(or, obj);
-		ORE_DBGMSG2("obj(0x%llx) get_attributes=%d dev=%d\n",
-			      _LLU(obj->id),
-			      ios->in_attr_len, first_dev);
-	}
-	if (ios->out_attr)
-		osd_req_add_set_attr_list(or, ios->out_attr, ios->out_attr_len);
-
-	if (ios->in_attr)
-		osd_req_add_get_attr_list(or, ios->in_attr, ios->in_attr_len);
-
-	return 0;
-}
-
-int ore_read(struct ore_io_state *ios)
-{
-	int i;
-	int ret;
-
-	ret = _prepare_for_striping(ios);
-	if (unlikely(ret))
-		return ret;
-
-	for (i = 0; i < ios->numdevs; i += ios->layout->mirrors_p1) {
-		ret = _ore_read_mirror(ios, i);
-		if (unlikely(ret))
-			return ret;
-	}
-
-	ret = ore_io_execute(ios);
-	return ret;
-}
-EXPORT_SYMBOL(ore_read);
-
-int extract_attr_from_ios(struct ore_io_state *ios, struct osd_attr *attr)
-{
-	struct osd_attr cur_attr = {.attr_page = 0}; /* start with zeros */
-	void *iter = NULL;
-	int nelem;
-
-	do {
-		nelem = 1;
-		osd_req_decode_get_attr_list(ios->per_dev[0].or,
-					     &cur_attr, &nelem, &iter);
-		if ((cur_attr.attr_page == attr->attr_page) &&
-		    (cur_attr.attr_id == attr->attr_id)) {
-			attr->len = cur_attr.len;
-			attr->val_ptr = cur_attr.val_ptr;
-			return 0;
-		}
-	} while (iter);
-
-	return -EIO;
-}
-EXPORT_SYMBOL(extract_attr_from_ios);
-
-static int _truncate_mirrors(struct ore_io_state *ios, unsigned cur_comp,
-			     struct osd_attr *attr)
-{
-	int last_comp = cur_comp + ios->layout->mirrors_p1;
-
-	for (; cur_comp < last_comp; ++cur_comp) {
-		struct ore_per_dev_state *per_dev = &ios->per_dev[cur_comp];
-		struct osd_request *or;
-
-		or = osd_start_request(_ios_od(ios, cur_comp));
-		if (unlikely(!or)) {
-			ORE_ERR("%s: osd_start_request failed\n", __func__);
-			return -ENOMEM;
-		}
-		per_dev->or = or;
-
-		osd_req_set_attributes(or, _ios_obj(ios, cur_comp));
-		osd_req_add_set_attr_list(or, attr, 1);
-	}
-
-	return 0;
-}
-
-struct _trunc_info {
-	struct ore_striping_info si;
-	u64 prev_group_obj_off;
-	u64 next_group_obj_off;
-
-	unsigned first_group_dev;
-	unsigned nex_group_dev;
-};
-
-static void _calc_trunk_info(struct ore_layout *layout, u64 file_offset,
-			     struct _trunc_info *ti)
-{
-	unsigned stripe_unit = layout->stripe_unit;
-
-	ore_calc_stripe_info(layout, file_offset, 0, &ti->si);
-
-	ti->prev_group_obj_off = ti->si.M * stripe_unit;
-	ti->next_group_obj_off = ti->si.M ? (ti->si.M - 1) * stripe_unit : 0;
-
-	ti->first_group_dev = ti->si.dev - (ti->si.dev % layout->group_width);
-	ti->nex_group_dev = ti->first_group_dev + layout->group_width;
-}
-
-int ore_truncate(struct ore_layout *layout, struct ore_components *oc,
-		   u64 size)
-{
-	struct ore_io_state *ios;
-	struct exofs_trunc_attr {
-		struct osd_attr attr;
-		__be64 newsize;
-	} *size_attrs;
-	struct _trunc_info ti;
-	int i, ret;
-
-	ret = ore_get_io_state(layout, oc, &ios);
-	if (unlikely(ret))
-		return ret;
-
-	_calc_trunk_info(ios->layout, size, &ti);
-
-	size_attrs = kcalloc(ios->oc->numdevs, sizeof(*size_attrs),
-			     GFP_KERNEL);
-	if (unlikely(!size_attrs)) {
-		ret = -ENOMEM;
-		goto out;
-	}
-
-	ios->numdevs = ios->oc->numdevs;
-
-	for (i = 0; i < ios->numdevs; ++i) {
-		struct exofs_trunc_attr *size_attr = &size_attrs[i];
-		u64 obj_size;
-
-		if (i < ti.first_group_dev)
-			obj_size = ti.prev_group_obj_off;
-		else if (i >= ti.nex_group_dev)
-			obj_size = ti.next_group_obj_off;
-		else if (i < ti.si.dev) /* dev within this group */
-			obj_size = ti.si.obj_offset +
-				      ios->layout->stripe_unit - ti.si.unit_off;
-		else if (i == ti.si.dev)
-			obj_size = ti.si.obj_offset;
-		else /* i > ti.dev */
-			obj_size = ti.si.obj_offset - ti.si.unit_off;
-
-		size_attr->newsize = cpu_to_be64(obj_size);
-		size_attr->attr = g_attr_logical_length;
-		size_attr->attr.val_ptr = &size_attr->newsize;
-
-		ORE_DBGMSG2("trunc(0x%llx) obj_offset=0x%llx dev=%d\n",
-			     _LLU(oc->comps->obj.id), _LLU(obj_size), i);
-		ret = _truncate_mirrors(ios, i * ios->layout->mirrors_p1,
-					&size_attr->attr);
-		if (unlikely(ret))
-			goto out;
-	}
-	ret = ore_io_execute(ios);
-
-out:
-	kfree(size_attrs);
-	ore_put_io_state(ios);
-	return ret;
-}
-EXPORT_SYMBOL(ore_truncate);
-
-const struct osd_attr g_attr_logical_length = ATTR_DEF(
-	OSD_APAGE_OBJECT_INFORMATION, OSD_ATTR_OI_LOGICAL_LENGTH, 8);
-EXPORT_SYMBOL(g_attr_logical_length);
diff --git a/fs/exofs/ore_raid.c b/fs/exofs/ore_raid.c
deleted file mode 100644
index 199590f36203..000000000000
--- a/fs/exofs/ore_raid.c
+++ /dev/null
@@ -1,756 +0,0 @@
-/*
- * Copyright (C) 2011
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * This file is part of the objects raid engine (ore).
- *
- * It is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- * You should have received a copy of the GNU General Public License
- * along with "ore". If not, write to the Free Software Foundation, Inc:
- *	"Free Software Foundation <info@fsf.org>"
- */
-
-#include <linux/gfp.h>
-#include <linux/async_tx.h>
-
-#include "ore_raid.h"
-
-#undef ORE_DBGMSG2
-#define ORE_DBGMSG2 ORE_DBGMSG
-
-static struct page *_raid_page_alloc(void)
-{
-	return alloc_page(GFP_KERNEL);
-}
-
-static void _raid_page_free(struct page *p)
-{
-	__free_page(p);
-}
-
-/* This struct is forward declare in ore_io_state, but is private to here.
- * It is put on ios->sp2d for RAID5/6 writes only. See _gen_xor_unit.
- *
- * __stripe_pages_2d is a 2d array of pages, and it is also a corner turn.
- * Ascending page index access is sp2d(p-minor, c-major). But storage is
- * sp2d[p-minor][c-major], so it can be properlly presented to the async-xor
- * API.
- */
-struct __stripe_pages_2d {
-	/* Cache some hot path repeated calculations */
-	unsigned parity;
-	unsigned data_devs;
-	unsigned pages_in_unit;
-
-	bool needed ;
-
-	/* Array size is pages_in_unit (layout->stripe_unit / PAGE_SIZE) */
-	struct __1_page_stripe {
-		bool alloc;
-		unsigned write_count;
-		struct async_submit_ctl submit;
-		struct dma_async_tx_descriptor *tx;
-
-		/* The size of this array is data_devs + parity */
-		struct page **pages;
-		struct page **scribble;
-		/* bool array, size of this array is data_devs */
-		char *page_is_read;
-	} _1p_stripes[];
-};
-
-/* This can get bigger then a page. So support multiple page allocations
- * _sp2d_free should be called even if _sp2d_alloc fails (by returning
- * none-zero).
- */
-static int _sp2d_alloc(unsigned pages_in_unit, unsigned group_width,
-		       unsigned parity, struct __stripe_pages_2d **psp2d)
-{
-	struct __stripe_pages_2d *sp2d;
-	unsigned data_devs = group_width - parity;
-
-	/*
-	 * Desired allocation layout is, though when larger than PAGE_SIZE,
-	 * each struct __alloc_1p_arrays is separately allocated:
-
-	struct _alloc_all_bytes {
-		struct __alloc_stripe_pages_2d {
-			struct __stripe_pages_2d sp2d;
-			struct __1_page_stripe _1p_stripes[pages_in_unit];
-		} __asp2d;
-		struct __alloc_1p_arrays {
-			struct page *pages[group_width];
-			struct page *scribble[group_width];
-			char page_is_read[data_devs];
-		} __a1pa[pages_in_unit];
-	} *_aab;
-
-	struct __alloc_1p_arrays *__a1pa;
-	struct __alloc_1p_arrays *__a1pa_end;
-
-	*/
-
-	char *__a1pa;
-	char *__a1pa_end;
-
-	const size_t sizeof_stripe_pages_2d =
-		sizeof(struct __stripe_pages_2d) +
-		sizeof(struct __1_page_stripe) * pages_in_unit;
-	const size_t sizeof__a1pa =
-		ALIGN(sizeof(struct page *) * (2 * group_width) + data_devs,
-		      sizeof(void *));
-	const size_t sizeof__a1pa_arrays = sizeof__a1pa * pages_in_unit;
-	const size_t alloc_total = sizeof_stripe_pages_2d +
-				   sizeof__a1pa_arrays;
-
-	unsigned num_a1pa, alloc_size, i;
-
-	/* FIXME: check these numbers in ore_verify_layout */
-	BUG_ON(sizeof_stripe_pages_2d > PAGE_SIZE);
-	BUG_ON(sizeof__a1pa > PAGE_SIZE);
-
-	/*
-	 * If alloc_total would be larger than PAGE_SIZE, only allocate
-	 * as many a1pa items as would fill the rest of the page, instead
-	 * of the full pages_in_unit count.
-	 */
-	if (alloc_total > PAGE_SIZE) {
-		num_a1pa = (PAGE_SIZE - sizeof_stripe_pages_2d) / sizeof__a1pa;
-		alloc_size = sizeof_stripe_pages_2d + sizeof__a1pa * num_a1pa;
-	} else {
-		num_a1pa = pages_in_unit;
-		alloc_size = alloc_total;
-	}
-
-	*psp2d = sp2d = kzalloc(alloc_size, GFP_KERNEL);
-	if (unlikely(!sp2d)) {
-		ORE_DBGMSG("!! Failed to alloc sp2d size=%d\n", alloc_size);
-		return -ENOMEM;
-	}
-	/* From here Just call _sp2d_free */
-
-	/* Find start of a1pa area. */
-	__a1pa = (char *)sp2d + sizeof_stripe_pages_2d;
-	/* Find end of the _allocated_ a1pa area. */
-	__a1pa_end = __a1pa + alloc_size;
-
-	/* Allocate additionally needed a1pa items in PAGE_SIZE chunks. */
-	for (i = 0; i < pages_in_unit; ++i) {
-		struct __1_page_stripe *stripe = &sp2d->_1p_stripes[i];
-
-		if (unlikely(__a1pa >= __a1pa_end)) {
-			num_a1pa = min_t(unsigned, PAGE_SIZE / sizeof__a1pa,
-							pages_in_unit - i);
-			alloc_size = sizeof__a1pa * num_a1pa;
-
-			__a1pa = kzalloc(alloc_size, GFP_KERNEL);
-			if (unlikely(!__a1pa)) {
-				ORE_DBGMSG("!! Failed to _alloc_1p_arrays=%d\n",
-					   num_a1pa);
-				return -ENOMEM;
-			}
-			__a1pa_end = __a1pa + alloc_size;
-			/* First *pages is marked for kfree of the buffer */
-			stripe->alloc = true;
-		}
-
-		/*
-		 * Attach all _lp_stripes pointers to the allocation for
-		 * it which was either part of the original PAGE_SIZE
-		 * allocation or the subsequent allocation in this loop.
-		 */
-		stripe->pages = (void *)__a1pa;
-		stripe->scribble = stripe->pages + group_width;
-		stripe->page_is_read = (char *)stripe->scribble + group_width;
-		__a1pa += sizeof__a1pa;
-	}
-
-	sp2d->parity = parity;
-	sp2d->data_devs = data_devs;
-	sp2d->pages_in_unit = pages_in_unit;
-	return 0;
-}
-
-static void _sp2d_reset(struct __stripe_pages_2d *sp2d,
-			const struct _ore_r4w_op *r4w, void *priv)
-{
-	unsigned data_devs = sp2d->data_devs;
-	unsigned group_width = data_devs + sp2d->parity;
-	int p, c;
-
-	if (!sp2d->needed)
-		return;
-
-	for (c = data_devs - 1; c >= 0; --c)
-		for (p = sp2d->pages_in_unit - 1; p >= 0; --p) {
-			struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p];
-
-			if (_1ps->page_is_read[c]) {
-				struct page *page = _1ps->pages[c];
-
-				r4w->put_page(priv, page);
-				_1ps->page_is_read[c] = false;
-			}
-		}
-
-	for (p = 0; p < sp2d->pages_in_unit; p++) {
-		struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p];
-
-		memset(_1ps->pages, 0, group_width * sizeof(*_1ps->pages));
-		_1ps->write_count = 0;
-		_1ps->tx = NULL;
-	}
-
-	sp2d->needed = false;
-}
-
-static void _sp2d_free(struct __stripe_pages_2d *sp2d)
-{
-	unsigned i;
-
-	if (!sp2d)
-		return;
-
-	for (i = 0; i < sp2d->pages_in_unit; ++i) {
-		if (sp2d->_1p_stripes[i].alloc)
-			kfree(sp2d->_1p_stripes[i].pages);
-	}
-
-	kfree(sp2d);
-}
-
-static unsigned _sp2d_min_pg(struct __stripe_pages_2d *sp2d)
-{
-	unsigned p;
-
-	for (p = 0; p < sp2d->pages_in_unit; p++) {
-		struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p];
-
-		if (_1ps->write_count)
-			return p;
-	}
-
-	return ~0;
-}
-
-static unsigned _sp2d_max_pg(struct __stripe_pages_2d *sp2d)
-{
-	int p;
-
-	for (p = sp2d->pages_in_unit - 1; p >= 0; --p) {
-		struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p];
-
-		if (_1ps->write_count)
-			return p;
-	}
-
-	return ~0;
-}
-
-static void _gen_xor_unit(struct __stripe_pages_2d *sp2d)
-{
-	unsigned p;
-	unsigned tx_flags = ASYNC_TX_ACK;
-
-	if (sp2d->parity == 1)
-		tx_flags |= ASYNC_TX_XOR_ZERO_DST;
-
-	for (p = 0; p < sp2d->pages_in_unit; p++) {
-		struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p];
-
-		if (!_1ps->write_count)
-			continue;
-
-		init_async_submit(&_1ps->submit, tx_flags,
-			NULL, NULL, NULL, (addr_conv_t *)_1ps->scribble);
-
-		if (sp2d->parity == 1)
-			_1ps->tx = async_xor(_1ps->pages[sp2d->data_devs],
-						_1ps->pages, 0, sp2d->data_devs,
-						PAGE_SIZE, &_1ps->submit);
-		else /* parity == 2 */
-			_1ps->tx = async_gen_syndrome(_1ps->pages, 0,
-						sp2d->data_devs + sp2d->parity,
-						PAGE_SIZE, &_1ps->submit);
-	}
-
-	for (p = 0; p < sp2d->pages_in_unit; p++) {
-		struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p];
-		/* NOTE: We wait for HW synchronously (I don't have such HW
-		 * to test with.) Is parallelism needed with today's multi
-		 * cores?
-		 */
-		async_tx_issue_pending(_1ps->tx);
-	}
-}
-
-void _ore_add_stripe_page(struct __stripe_pages_2d *sp2d,
-		       struct ore_striping_info *si, struct page *page)
-{
-	struct __1_page_stripe *_1ps;
-
-	sp2d->needed = true;
-
-	_1ps = &sp2d->_1p_stripes[si->cur_pg];
-	_1ps->pages[si->cur_comp] = page;
-	++_1ps->write_count;
-
-	si->cur_pg = (si->cur_pg + 1) % sp2d->pages_in_unit;
-	/* si->cur_comp is advanced outside at main loop */
-}
-
-void _ore_add_sg_seg(struct ore_per_dev_state *per_dev, unsigned cur_len,
-		     bool not_last)
-{
-	struct osd_sg_entry *sge;
-
-	ORE_DBGMSG("dev=%d cur_len=0x%x not_last=%d cur_sg=%d "
-		     "offset=0x%llx length=0x%x last_sgs_total=0x%x\n",
-		     per_dev->dev, cur_len, not_last, per_dev->cur_sg,
-		     _LLU(per_dev->offset), per_dev->length,
-		     per_dev->last_sgs_total);
-
-	if (!per_dev->cur_sg) {
-		sge = per_dev->sglist;
-
-		/* First time we prepare two entries */
-		if (per_dev->length) {
-			++per_dev->cur_sg;
-			sge->offset = per_dev->offset;
-			sge->len = per_dev->length;
-		} else {
-			/* Here the parity is the first unit of this object.
-			 * This happens every time we reach a parity device on
-			 * the same stripe as the per_dev->offset. We need to
-			 * just skip this unit.
-			 */
-			per_dev->offset += cur_len;
-			return;
-		}
-	} else {
-		/* finalize the last one */
-		sge = &per_dev->sglist[per_dev->cur_sg - 1];
-		sge->len = per_dev->length - per_dev->last_sgs_total;
-	}
-
-	if (not_last) {
-		/* Partly prepare the next one */
-		struct osd_sg_entry *next_sge = sge + 1;
-
-		++per_dev->cur_sg;
-		next_sge->offset = sge->offset + sge->len + cur_len;
-		/* Save cur len so we know how mutch was added next time */
-		per_dev->last_sgs_total = per_dev->length;
-		next_sge->len = 0;
-	} else if (!sge->len) {
-		/* Optimize for when the last unit is a parity */
-		--per_dev->cur_sg;
-	}
-}
-
-static int _alloc_read_4_write(struct ore_io_state *ios)
-{
-	struct ore_layout *layout = ios->layout;
-	int ret;
-	/* We want to only read those pages not in cache so worst case
-	 * is a stripe populated with every other page
-	 */
-	unsigned sgs_per_dev = ios->sp2d->pages_in_unit + 2;
-
-	ret = _ore_get_io_state(layout, ios->oc,
-				layout->group_width * layout->mirrors_p1,
-				sgs_per_dev, 0, &ios->ios_read_4_write);
-	return ret;
-}
-
-/* @si contains info of the to-be-inserted page. Update of @si should be
- * maintained by caller. Specificaly si->dev, si->obj_offset, ...
- */
-static int _add_to_r4w(struct ore_io_state *ios, struct ore_striping_info *si,
-		       struct page *page, unsigned pg_len)
-{
-	struct request_queue *q;
-	struct ore_per_dev_state *per_dev;
-	struct ore_io_state *read_ios;
-	unsigned first_dev = si->dev - (si->dev %
-			  (ios->layout->group_width * ios->layout->mirrors_p1));
-	unsigned comp = si->dev - first_dev;
-	unsigned added_len;
-
-	if (!ios->ios_read_4_write) {
-		int ret = _alloc_read_4_write(ios);
-
-		if (unlikely(ret))
-			return ret;
-	}
-
-	read_ios = ios->ios_read_4_write;
-	read_ios->numdevs = ios->layout->group_width * ios->layout->mirrors_p1;
-
-	per_dev = &read_ios->per_dev[comp];
-	if (!per_dev->length) {
-		per_dev->bio = bio_kmalloc(GFP_KERNEL,
-					   ios->sp2d->pages_in_unit);
-		if (unlikely(!per_dev->bio)) {
-			ORE_DBGMSG("Failed to allocate BIO size=%u\n",
-				     ios->sp2d->pages_in_unit);
-			return -ENOMEM;
-		}
-		per_dev->offset = si->obj_offset;
-		per_dev->dev = si->dev;
-	} else if (si->obj_offset != (per_dev->offset + per_dev->length)) {
-		u64 gap = si->obj_offset - (per_dev->offset + per_dev->length);
-
-		_ore_add_sg_seg(per_dev, gap, true);
-	}
-	q = osd_request_queue(ore_comp_dev(read_ios->oc, per_dev->dev));
-	added_len = bio_add_pc_page(q, per_dev->bio, page, pg_len,
-				    si->obj_offset % PAGE_SIZE);
-	if (unlikely(added_len != pg_len)) {
-		ORE_DBGMSG("Failed to bio_add_pc_page bi_vcnt=%d\n",
-			      per_dev->bio->bi_vcnt);
-		return -ENOMEM;
-	}
-
-	per_dev->length += pg_len;
-	return 0;
-}
-
-/* read the beginning of an unaligned first page */
-static int _add_to_r4w_first_page(struct ore_io_state *ios, struct page *page)
-{
-	struct ore_striping_info si;
-	unsigned pg_len;
-
-	ore_calc_stripe_info(ios->layout, ios->offset, 0, &si);
-
-	pg_len = si.obj_offset % PAGE_SIZE;
-	si.obj_offset -= pg_len;
-
-	ORE_DBGMSG("offset=0x%llx len=0x%x index=0x%lx dev=%x\n",
-		   _LLU(si.obj_offset), pg_len, page->index, si.dev);
-
-	return _add_to_r4w(ios, &si, page, pg_len);
-}
-
-/* read the end of an incomplete last page */
-static int _add_to_r4w_last_page(struct ore_io_state *ios, u64 *offset)
-{
-	struct ore_striping_info si;
-	struct page *page;
-	unsigned pg_len, p, c;
-
-	ore_calc_stripe_info(ios->layout, *offset, 0, &si);
-
-	p = si.cur_pg;
-	c = si.cur_comp;
-	page = ios->sp2d->_1p_stripes[p].pages[c];
-
-	pg_len = PAGE_SIZE - (si.unit_off % PAGE_SIZE);
-	*offset += pg_len;
-
-	ORE_DBGMSG("p=%d, c=%d next-offset=0x%llx len=0x%x dev=%x par_dev=%d\n",
-		   p, c, _LLU(*offset), pg_len, si.dev, si.par_dev);
-
-	BUG_ON(!page);
-
-	return _add_to_r4w(ios, &si, page, pg_len);
-}
-
-static void _mark_read4write_pages_uptodate(struct ore_io_state *ios, int ret)
-{
-	struct bio_vec *bv;
-	unsigned i, d;
-
-	/* loop on all devices all pages */
-	for (d = 0; d < ios->numdevs; d++) {
-		struct bio *bio = ios->per_dev[d].bio;
-
-		if (!bio)
-			continue;
-
-		bio_for_each_segment_all(bv, bio, i) {
-			struct page *page = bv->bv_page;
-
-			SetPageUptodate(page);
-			if (PageError(page))
-				ClearPageError(page);
-		}
-	}
-}
-
-/* read_4_write is hacked to read the start of the first stripe and/or
- * the end of the last stripe. If needed, with an sg-gap at each device/page.
- * It is assumed to be called after the to_be_written pages of the first stripe
- * are populating ios->sp2d[][]
- *
- * NOTE: We call ios->r4w->lock_fn for all pages needed for parity calculations
- * These pages are held at sp2d[p].pages[c] but with
- * sp2d[p].page_is_read[c] = true. At _sp2d_reset these pages are
- * ios->r4w->lock_fn(). The ios->r4w->lock_fn might signal that the page is
- * @uptodate=true, so we don't need to read it, only unlock, after IO.
- *
- * TODO: The read_4_write should calc a need_to_read_pages_count, if bigger then
- * to-be-written count, we should consider the xor-in-place mode.
- * need_to_read_pages_count is the actual number of pages not present in cache.
- * maybe "devs_in_group - ios->sp2d[p].write_count" is a good enough
- * approximation? In this mode the read pages are put in the empty places of
- * ios->sp2d[p][*], xor is calculated the same way. These pages are
- * allocated/freed and don't go through cache
- */
-static int _read_4_write_first_stripe(struct ore_io_state *ios)
-{
-	struct ore_striping_info read_si;
-	struct __stripe_pages_2d *sp2d = ios->sp2d;
-	u64 offset = ios->si.first_stripe_start;
-	unsigned c, p, min_p = sp2d->pages_in_unit, max_p = -1;
-
-	if (offset == ios->offset) /* Go to start collect $200 */
-		goto read_last_stripe;
-
-	min_p = _sp2d_min_pg(sp2d);
-	max_p = _sp2d_max_pg(sp2d);
-
-	ORE_DBGMSG("stripe_start=0x%llx ios->offset=0x%llx min_p=%d max_p=%d\n",
-		   offset, ios->offset, min_p, max_p);
-
-	for (c = 0; ; c++) {
-		ore_calc_stripe_info(ios->layout, offset, 0, &read_si);
-		read_si.obj_offset += min_p * PAGE_SIZE;
-		offset += min_p * PAGE_SIZE;
-		for (p = min_p; p <= max_p; p++) {
-			struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p];
-			struct page **pp = &_1ps->pages[c];
-			bool uptodate;
-
-			if (*pp) {
-				if (ios->offset % PAGE_SIZE)
-					/* Read the remainder of the page */
-					_add_to_r4w_first_page(ios, *pp);
-				/* to-be-written pages start here */
-				goto read_last_stripe;
-			}
-
-			*pp = ios->r4w->get_page(ios->private, offset,
-						 &uptodate);
-			if (unlikely(!*pp))
-				return -ENOMEM;
-
-			if (!uptodate)
-				_add_to_r4w(ios, &read_si, *pp, PAGE_SIZE);
-
-			/* Mark read-pages to be cache_released */
-			_1ps->page_is_read[c] = true;
-			read_si.obj_offset += PAGE_SIZE;
-			offset += PAGE_SIZE;
-		}
-		offset += (sp2d->pages_in_unit - p) * PAGE_SIZE;
-	}
-
-read_last_stripe:
-	return 0;
-}
-
-static int _read_4_write_last_stripe(struct ore_io_state *ios)
-{
-	struct ore_striping_info read_si;
-	struct __stripe_pages_2d *sp2d = ios->sp2d;
-	u64 offset;
-	u64 last_stripe_end;
-	unsigned bytes_in_stripe = ios->si.bytes_in_stripe;
-	unsigned c, p, min_p = sp2d->pages_in_unit, max_p = -1;
-
-	offset = ios->offset + ios->length;
-	if (offset % PAGE_SIZE)
-		_add_to_r4w_last_page(ios, &offset);
-		/* offset will be aligned to next page */
-
-	last_stripe_end = div_u64(offset + bytes_in_stripe - 1, bytes_in_stripe)
-				 * bytes_in_stripe;
-	if (offset == last_stripe_end) /* Optimize for the aligned case */
-		goto read_it;
-
-	ore_calc_stripe_info(ios->layout, offset, 0, &read_si);
-	p = read_si.cur_pg;
-	c = read_si.cur_comp;
-
-	if (min_p == sp2d->pages_in_unit) {
-		/* Didn't do it yet */
-		min_p = _sp2d_min_pg(sp2d);
-		max_p = _sp2d_max_pg(sp2d);
-	}
-
-	ORE_DBGMSG("offset=0x%llx stripe_end=0x%llx min_p=%d max_p=%d\n",
-		   offset, last_stripe_end, min_p, max_p);
-
-	while (offset < last_stripe_end) {
-		struct __1_page_stripe *_1ps = &sp2d->_1p_stripes[p];
-
-		if ((min_p <= p) && (p <= max_p)) {
-			struct page *page;
-			bool uptodate;
-
-			BUG_ON(_1ps->pages[c]);
-			page = ios->r4w->get_page(ios->private, offset,
-						  &uptodate);
-			if (unlikely(!page))
-				return -ENOMEM;
-
-			_1ps->pages[c] = page;
-			/* Mark read-pages to be cache_released */
-			_1ps->page_is_read[c] = true;
-			if (!uptodate)
-				_add_to_r4w(ios, &read_si, page, PAGE_SIZE);
-		}
-
-		offset += PAGE_SIZE;
-		if (p == (sp2d->pages_in_unit - 1)) {
-			++c;
-			p = 0;
-			ore_calc_stripe_info(ios->layout, offset, 0, &read_si);
-		} else {
-			read_si.obj_offset += PAGE_SIZE;
-			++p;
-		}
-	}
-
-read_it:
-	return 0;
-}
-
-static int _read_4_write_execute(struct ore_io_state *ios)
-{
-	struct ore_io_state *ios_read;
-	unsigned i;
-	int ret;
-
-	ios_read = ios->ios_read_4_write;
-	if (!ios_read)
-		return 0;
-
-	/* FIXME: Ugly to signal _sbi_read_mirror that we have bio(s). Change
-	 * to check for per_dev->bio
-	 */
-	ios_read->pages = ios->pages;
-
-	/* Now read these devices */
-	for (i = 0; i < ios_read->numdevs; i += ios_read->layout->mirrors_p1) {
-		ret = _ore_read_mirror(ios_read, i);
-		if (unlikely(ret))
-			return ret;
-	}
-
-	ret = ore_io_execute(ios_read); /* Synchronus execution */
-	if (unlikely(ret)) {
-		ORE_DBGMSG("!! ore_io_execute => %d\n", ret);
-		return ret;
-	}
-
-	_mark_read4write_pages_uptodate(ios_read, ret);
-	ore_put_io_state(ios_read);
-	ios->ios_read_4_write = NULL; /* Might need a reuse at last stripe */
-	return 0;
-}
-
-/* In writes @cur_len means length left. .i.e cur_len==0 is the last parity U */
-int _ore_add_parity_unit(struct ore_io_state *ios,
-			    struct ore_striping_info *si,
-			    struct ore_per_dev_state *per_dev,
-			    unsigned cur_len, bool do_xor)
-{
-	if (ios->reading) {
-		if (per_dev->cur_sg >= ios->sgs_per_dev) {
-			ORE_DBGMSG("cur_sg(%d) >= sgs_per_dev(%d)\n" ,
-				per_dev->cur_sg, ios->sgs_per_dev);
-			return -ENOMEM;
-		}
-		_ore_add_sg_seg(per_dev, cur_len, true);
-	} else {
-		struct __stripe_pages_2d *sp2d = ios->sp2d;
-		struct page **pages = ios->parity_pages + ios->cur_par_page;
-		unsigned num_pages;
-		unsigned array_start = 0;
-		unsigned i;
-		int ret;
-
-		si->cur_pg = _sp2d_min_pg(sp2d);
-		num_pages  = _sp2d_max_pg(sp2d) + 1 - si->cur_pg;
-
-		if (!per_dev->length) {
-			per_dev->offset += si->cur_pg * PAGE_SIZE;
-			/* If first stripe, Read in all read4write pages
-			 * (if needed) before we calculate the first parity.
-			 */
-			if (do_xor)
-				_read_4_write_first_stripe(ios);
-		}
-		if (!cur_len && do_xor)
-			/* If last stripe r4w pages of last stripe */
-			_read_4_write_last_stripe(ios);
-		_read_4_write_execute(ios);
-
-		for (i = 0; i < num_pages; i++) {
-			pages[i] = _raid_page_alloc();
-			if (unlikely(!pages[i]))
-				return -ENOMEM;
-
-			++(ios->cur_par_page);
-		}
-
-		BUG_ON(si->cur_comp < sp2d->data_devs);
-		BUG_ON(si->cur_pg + num_pages > sp2d->pages_in_unit);
-
-		ret = _ore_add_stripe_unit(ios,  &array_start, 0, pages,
-					   per_dev, num_pages * PAGE_SIZE);
-		if (unlikely(ret))
-			return ret;
-
-		if (do_xor) {
-			_gen_xor_unit(sp2d);
-			_sp2d_reset(sp2d, ios->r4w, ios->private);
-		}
-	}
-	return 0;
-}
-
-int _ore_post_alloc_raid_stuff(struct ore_io_state *ios)
-{
-	if (ios->parity_pages) {
-		struct ore_layout *layout = ios->layout;
-		unsigned pages_in_unit = layout->stripe_unit / PAGE_SIZE;
-
-		if (_sp2d_alloc(pages_in_unit, layout->group_width,
-				layout->parity, &ios->sp2d)) {
-			return -ENOMEM;
-		}
-	}
-	return 0;
-}
-
-void _ore_free_raid_stuff(struct ore_io_state *ios)
-{
-	if (ios->sp2d) { /* writing and raid */
-		unsigned i;
-
-		for (i = 0; i < ios->cur_par_page; i++) {
-			struct page *page = ios->parity_pages[i];
-
-			if (page)
-				_raid_page_free(page);
-		}
-		if (ios->extra_part_alloc)
-			kfree(ios->parity_pages);
-		/* If IO returned an error pages might need unlocking */
-		_sp2d_reset(ios->sp2d, ios->r4w, ios->private);
-		_sp2d_free(ios->sp2d);
-	} else {
-		/* Will only be set if raid reading && sglist is big */
-		if (ios->extra_part_alloc)
-			kfree(ios->per_dev[0].sglist);
-	}
-	if (ios->ios_read_4_write)
-		ore_put_io_state(ios->ios_read_4_write);
-}
diff --git a/fs/exofs/ore_raid.h b/fs/exofs/ore_raid.h
deleted file mode 100644
index a6e746775570..000000000000
--- a/fs/exofs/ore_raid.h
+++ /dev/null
@@ -1,62 +0,0 @@
-/*
- * Copyright (C) from 2011
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * This file is part of the objects raid engine (ore).
- *
- * It is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License version 2 as published
- * by the Free Software Foundation.
- *
- * You should have received a copy of the GNU General Public License
- * along with "ore". If not, write to the Free Software Foundation, Inc:
- *	"Free Software Foundation <info@fsf.org>"
- */
-
-#include <scsi/osd_ore.h>
-
-#define ORE_ERR(fmt, a...) printk(KERN_ERR "ore: " fmt, ##a)
-
-#ifdef CONFIG_EXOFS_DEBUG
-#define ORE_DBGMSG(fmt, a...) \
-	printk(KERN_NOTICE "ore @%s:%d: " fmt, __func__, __LINE__, ##a)
-#else
-#define ORE_DBGMSG(fmt, a...) \
-	do { if (0) printk(fmt, ##a); } while (0)
-#endif
-
-/* u64 has problems with printk this will cast it to unsigned long long */
-#define _LLU(x) (unsigned long long)(x)
-
-#define ORE_DBGMSG2(M...) do {} while (0)
-/* #define ORE_DBGMSG2 ORE_DBGMSG */
-
-/* ios_raid.c stuff needed by ios.c */
-int _ore_post_alloc_raid_stuff(struct ore_io_state *ios);
-void _ore_free_raid_stuff(struct ore_io_state *ios);
-
-void _ore_add_sg_seg(struct ore_per_dev_state *per_dev, unsigned cur_len,
-		 bool not_last);
-int _ore_add_parity_unit(struct ore_io_state *ios, struct ore_striping_info *si,
-		     struct ore_per_dev_state *per_dev, unsigned cur_len,
-		     bool do_xor);
-void _ore_add_stripe_page(struct __stripe_pages_2d *sp2d,
-		       struct ore_striping_info *si, struct page *page);
-static inline void _add_stripe_page(struct __stripe_pages_2d *sp2d,
-				struct ore_striping_info *si, struct page *page)
-{
-	if (!sp2d) /* Inline the fast path */
-		return; /* Hay no raid stuff */
-	_ore_add_stripe_page(sp2d, si, page);
-}
-
-/* ios.c stuff needed by ios_raid.c */
-int  _ore_get_io_state(struct ore_layout *layout,
-			struct ore_components *oc, unsigned numdevs,
-			unsigned sgs_per_dev, unsigned num_par_pages,
-			struct ore_io_state **pios);
-int _ore_add_stripe_unit(struct ore_io_state *ios,  unsigned *cur_pg,
-		unsigned pgbase, struct page **pages,
-		struct ore_per_dev_state *per_dev, int cur_len);
-int _ore_read_mirror(struct ore_io_state *ios, unsigned cur_comp);
-int ore_io_execute(struct ore_io_state *ios);
diff --git a/fs/exofs/super.c b/fs/exofs/super.c
deleted file mode 100644
index fc80c7233fa5..000000000000
--- a/fs/exofs/super.c
+++ /dev/null
@@ -1,1071 +0,0 @@
-/*
- * Copyright (C) 2005, 2006
- * Avishay Traeger (avishay@gmail.com)
- * Copyright (C) 2008, 2009
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * Copyrights for code taken from ext2:
- *     Copyright (C) 1992, 1993, 1994, 1995
- *     Remy Card (card@masi.ibp.fr)
- *     Laboratoire MASI - Institut Blaise Pascal
- *     Universite Pierre et Marie Curie (Paris VI)
- *     from
- *     linux/fs/minix/inode.c
- *     Copyright (C) 1991, 1992  Linus Torvalds
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation.  Since it is based on ext2, and the only
- * valid version of GPL for the Linux kernel is version 2, the only valid
- * version of GPL for exofs is version 2.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/string.h>
-#include <linux/parser.h>
-#include <linux/vfs.h>
-#include <linux/random.h>
-#include <linux/module.h>
-#include <linux/exportfs.h>
-#include <linux/slab.h>
-#include <linux/iversion.h>
-
-#include "exofs.h"
-
-#define EXOFS_DBGMSG2(M...) do {} while (0)
-
-/******************************************************************************
- * MOUNT OPTIONS
- *****************************************************************************/
-
-/*
- * struct to hold what we get from mount options
- */
-struct exofs_mountopt {
-	bool is_osdname;
-	const char *dev_name;
-	uint64_t pid;
-	int timeout;
-};
-
-/*
- * exofs-specific mount-time options.
- */
-enum { Opt_name, Opt_pid, Opt_to, Opt_err };
-
-/*
- * Our mount-time options.  These should ideally be 64-bit unsigned, but the
- * kernel's parsing functions do not currently support that.  32-bit should be
- * sufficient for most applications now.
- */
-static match_table_t tokens = {
-	{Opt_name, "osdname=%s"},
-	{Opt_pid, "pid=%u"},
-	{Opt_to, "to=%u"},
-	{Opt_err, NULL}
-};
-
-/*
- * The main option parsing method.  Also makes sure that all of the mandatory
- * mount options were set.
- */
-static int parse_options(char *options, struct exofs_mountopt *opts)
-{
-	char *p;
-	substring_t args[MAX_OPT_ARGS];
-	int option;
-	bool s_pid = false;
-
-	EXOFS_DBGMSG("parse_options %s\n", options);
-	/* defaults */
-	memset(opts, 0, sizeof(*opts));
-	opts->timeout = BLK_DEFAULT_SG_TIMEOUT;
-
-	while ((p = strsep(&options, ",")) != NULL) {
-		int token;
-		char str[32];
-
-		if (!*p)
-			continue;
-
-		token = match_token(p, tokens, args);
-		switch (token) {
-		case Opt_name:
-			kfree(opts->dev_name);
-			opts->dev_name = match_strdup(&args[0]);
-			if (unlikely(!opts->dev_name)) {
-				EXOFS_ERR("Error allocating dev_name");
-				return -ENOMEM;
-			}
-			opts->is_osdname = true;
-			break;
-		case Opt_pid:
-			if (0 == match_strlcpy(str, &args[0], sizeof(str)))
-				return -EINVAL;
-			opts->pid = simple_strtoull(str, NULL, 0);
-			if (opts->pid < EXOFS_MIN_PID) {
-				EXOFS_ERR("Partition ID must be >= %u",
-					  EXOFS_MIN_PID);
-				return -EINVAL;
-			}
-			s_pid = true;
-			break;
-		case Opt_to:
-			if (match_int(&args[0], &option))
-				return -EINVAL;
-			if (option <= 0) {
-				EXOFS_ERR("Timeout must be > 0");
-				return -EINVAL;
-			}
-			opts->timeout = option * HZ;
-			break;
-		}
-	}
-
-	if (!s_pid) {
-		EXOFS_ERR("Need to specify the following options:\n");
-		EXOFS_ERR("    -o pid=pid_no_to_use\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-/******************************************************************************
- * INODE CACHE
- *****************************************************************************/
-
-/*
- * Our inode cache.  Isn't it pretty?
- */
-static struct kmem_cache *exofs_inode_cachep;
-
-/*
- * Allocate an inode in the cache
- */
-static struct inode *exofs_alloc_inode(struct super_block *sb)
-{
-	struct exofs_i_info *oi;
-
-	oi = kmem_cache_alloc(exofs_inode_cachep, GFP_KERNEL);
-	if (!oi)
-		return NULL;
-
-	inode_set_iversion(&oi->vfs_inode, 1);
-	return &oi->vfs_inode;
-}
-
-static void exofs_i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kmem_cache_free(exofs_inode_cachep, exofs_i(inode));
-}
-
-/*
- * Remove an inode from the cache
- */
-static void exofs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, exofs_i_callback);
-}
-
-/*
- * Initialize the inode
- */
-static void exofs_init_once(void *foo)
-{
-	struct exofs_i_info *oi = foo;
-
-	inode_init_once(&oi->vfs_inode);
-}
-
-/*
- * Create and initialize the inode cache
- */
-static int init_inodecache(void)
-{
-	exofs_inode_cachep = kmem_cache_create_usercopy("exofs_inode_cache",
-				sizeof(struct exofs_i_info), 0,
-				SLAB_RECLAIM_ACCOUNT | SLAB_MEM_SPREAD |
-				SLAB_ACCOUNT,
-				offsetof(struct exofs_i_info, i_data),
-				sizeof_field(struct exofs_i_info, i_data),
-				exofs_init_once);
-	if (exofs_inode_cachep == NULL)
-		return -ENOMEM;
-	return 0;
-}
-
-/*
- * Destroy the inode cache
- */
-static void destroy_inodecache(void)
-{
-	/*
-	 * Make sure all delayed rcu free inodes are flushed before we
-	 * destroy cache.
-	 */
-	rcu_barrier();
-	kmem_cache_destroy(exofs_inode_cachep);
-}
-
-/******************************************************************************
- * Some osd helpers
- *****************************************************************************/
-void exofs_make_credential(u8 cred_a[OSD_CAP_LEN], const struct osd_obj_id *obj)
-{
-	osd_sec_init_nosec_doall_caps(cred_a, obj, false, true);
-}
-
-static int exofs_read_kern(struct osd_dev *od, u8 *cred, struct osd_obj_id *obj,
-		    u64 offset, void *p, unsigned length)
-{
-	struct osd_request *or = osd_start_request(od);
-/*	struct osd_sense_info osi = {.key = 0};*/
-	int ret;
-
-	if (unlikely(!or)) {
-		EXOFS_DBGMSG("%s: osd_start_request failed.\n", __func__);
-		return -ENOMEM;
-	}
-	ret = osd_req_read_kern(or, obj, offset, p, length);
-	if (unlikely(ret)) {
-		EXOFS_DBGMSG("%s: osd_req_read_kern failed.\n", __func__);
-		goto out;
-	}
-
-	ret = osd_finalize_request(or, 0, cred, NULL);
-	if (unlikely(ret)) {
-		EXOFS_DBGMSG("Failed to osd_finalize_request() => %d\n", ret);
-		goto out;
-	}
-
-	ret = osd_execute_request(or);
-	if (unlikely(ret))
-		EXOFS_DBGMSG("osd_execute_request() => %d\n", ret);
-	/* osd_req_decode_sense(or, ret); */
-
-out:
-	osd_end_request(or);
-	EXOFS_DBGMSG2("read_kern(0x%llx) offset=0x%llx "
-		      "length=0x%llx dev=%p ret=>%d\n",
-		      _LLU(obj->id), _LLU(offset), _LLU(length), od, ret);
-	return ret;
-}
-
-static const struct osd_attr g_attr_sb_stats = ATTR_DEF(
-	EXOFS_APAGE_SB_DATA,
-	EXOFS_ATTR_SB_STATS,
-	sizeof(struct exofs_sb_stats));
-
-static int __sbi_read_stats(struct exofs_sb_info *sbi)
-{
-	struct osd_attr attrs[] = {
-		[0] = g_attr_sb_stats,
-	};
-	struct ore_io_state *ios;
-	int ret;
-
-	ret = ore_get_io_state(&sbi->layout, &sbi->oc, &ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__);
-		return ret;
-	}
-
-	ios->in_attr = attrs;
-	ios->in_attr_len = ARRAY_SIZE(attrs);
-
-	ret = ore_read(ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("Error reading super_block stats => %d\n", ret);
-		goto out;
-	}
-
-	ret = extract_attr_from_ios(ios, &attrs[0]);
-	if (ret) {
-		EXOFS_ERR("%s: extract_attr of sb_stats failed\n", __func__);
-		goto out;
-	}
-	if (attrs[0].len) {
-		struct exofs_sb_stats *ess;
-
-		if (unlikely(attrs[0].len != sizeof(*ess))) {
-			EXOFS_ERR("%s: Wrong version of exofs_sb_stats "
-				  "size(%d) != expected(%zd)\n",
-				  __func__, attrs[0].len, sizeof(*ess));
-			goto out;
-		}
-
-		ess = attrs[0].val_ptr;
-		sbi->s_nextid = le64_to_cpu(ess->s_nextid);
-		sbi->s_numfiles = le32_to_cpu(ess->s_numfiles);
-	}
-
-out:
-	ore_put_io_state(ios);
-	return ret;
-}
-
-static void stats_done(struct ore_io_state *ios, void *p)
-{
-	ore_put_io_state(ios);
-	/* Good thanks nothing to do anymore */
-}
-
-/* Asynchronously write the stats attribute */
-int exofs_sbi_write_stats(struct exofs_sb_info *sbi)
-{
-	struct osd_attr attrs[] = {
-		[0] = g_attr_sb_stats,
-	};
-	struct ore_io_state *ios;
-	int ret;
-
-	ret = ore_get_io_state(&sbi->layout, &sbi->oc, &ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("%s: ore_get_io_state failed.\n", __func__);
-		return ret;
-	}
-
-	sbi->s_ess.s_nextid   = cpu_to_le64(sbi->s_nextid);
-	sbi->s_ess.s_numfiles = cpu_to_le64(sbi->s_numfiles);
-	attrs[0].val_ptr = &sbi->s_ess;
-
-
-	ios->done = stats_done;
-	ios->private = sbi;
-	ios->out_attr = attrs;
-	ios->out_attr_len = ARRAY_SIZE(attrs);
-
-	ret = ore_write(ios);
-	if (unlikely(ret)) {
-		EXOFS_ERR("%s: ore_write failed.\n", __func__);
-		ore_put_io_state(ios);
-	}
-
-	return ret;
-}
-
-/******************************************************************************
- * SUPERBLOCK FUNCTIONS
- *****************************************************************************/
-static const struct super_operations exofs_sops;
-static const struct export_operations exofs_export_ops;
-
-/*
- * Write the superblock to the OSD
- */
-static int exofs_sync_fs(struct super_block *sb, int wait)
-{
-	struct exofs_sb_info *sbi;
-	struct exofs_fscb *fscb;
-	struct ore_comp one_comp;
-	struct ore_components oc;
-	struct ore_io_state *ios;
-	int ret = -ENOMEM;
-
-	fscb = kmalloc(sizeof(*fscb), GFP_KERNEL);
-	if (unlikely(!fscb))
-		return -ENOMEM;
-
-	sbi = sb->s_fs_info;
-
-	/* NOTE: We no longer dirty the super_block anywhere in exofs. The
-	 * reason we write the fscb here on unmount is so we can stay backwards
-	 * compatible with fscb->s_version == 1. (What we are not compatible
-	 * with is if a new version FS crashed and then we try to mount an old
-	 * version). Otherwise the exofs_fscb is read-only from mkfs time. All
-	 * the writeable info is set in exofs_sbi_write_stats() above.
-	 */
-
-	exofs_init_comps(&oc, &one_comp, sbi, EXOFS_SUPER_ID);
-
-	ret = ore_get_io_state(&sbi->layout, &oc, &ios);
-	if (unlikely(ret))
-		goto out;
-
-	ios->length = offsetof(struct exofs_fscb, s_dev_table_oid);
-	memset(fscb, 0, ios->length);
-	fscb->s_nextid = cpu_to_le64(sbi->s_nextid);
-	fscb->s_numfiles = cpu_to_le64(sbi->s_numfiles);
-	fscb->s_magic = cpu_to_le16(sb->s_magic);
-	fscb->s_newfs = 0;
-	fscb->s_version = EXOFS_FSCB_VER;
-
-	ios->offset = 0;
-	ios->kern_buff = fscb;
-
-	ret = ore_write(ios);
-	if (unlikely(ret))
-		EXOFS_ERR("%s: ore_write failed.\n", __func__);
-
-out:
-	EXOFS_DBGMSG("s_nextid=0x%llx ret=%d\n", _LLU(sbi->s_nextid), ret);
-	ore_put_io_state(ios);
-	kfree(fscb);
-	return ret;
-}
-
-static void _exofs_print_device(const char *msg, const char *dev_path,
-				struct osd_dev *od, u64 pid)
-{
-	const struct osd_dev_info *odi = osduld_device_info(od);
-
-	printk(KERN_NOTICE "exofs: %s %s osd_name-%s pid-0x%llx\n",
-		msg, dev_path ?: "", odi->osdname, _LLU(pid));
-}
-
-static void exofs_free_sbi(struct exofs_sb_info *sbi)
-{
-	unsigned numdevs = sbi->oc.numdevs;
-
-	while (numdevs) {
-		unsigned i = --numdevs;
-		struct osd_dev *od = ore_comp_dev(&sbi->oc, i);
-
-		if (od) {
-			ore_comp_set_dev(&sbi->oc, i, NULL);
-			osduld_put_device(od);
-		}
-	}
-	kfree(sbi->oc.ods);
-	kfree(sbi);
-}
-
-/*
- * This function is called when the vfs is freeing the superblock.  We just
- * need to free our own part.
- */
-static void exofs_put_super(struct super_block *sb)
-{
-	int num_pend;
-	struct exofs_sb_info *sbi = sb->s_fs_info;
-
-	/* make sure there are no pending commands */
-	for (num_pend = atomic_read(&sbi->s_curr_pending); num_pend > 0;
-	     num_pend = atomic_read(&sbi->s_curr_pending)) {
-		wait_queue_head_t wq;
-
-		printk(KERN_NOTICE "%s: !!Pending operations in flight. "
-		       "This is a BUG. please report to osd-dev@open-osd.org\n",
-		       __func__);
-		init_waitqueue_head(&wq);
-		wait_event_timeout(wq,
-				  (atomic_read(&sbi->s_curr_pending) == 0),
-				  msecs_to_jiffies(100));
-	}
-
-	_exofs_print_device("Unmounting", NULL, ore_comp_dev(&sbi->oc, 0),
-			    sbi->one_comp.obj.partition);
-
-	exofs_sysfs_sb_del(sbi);
-	exofs_free_sbi(sbi);
-	sb->s_fs_info = NULL;
-}
-
-static int _read_and_match_data_map(struct exofs_sb_info *sbi, unsigned numdevs,
-				    struct exofs_device_table *dt)
-{
-	int ret;
-
-	sbi->layout.stripe_unit =
-				le64_to_cpu(dt->dt_data_map.cb_stripe_unit);
-	sbi->layout.group_width =
-				le32_to_cpu(dt->dt_data_map.cb_group_width);
-	sbi->layout.group_depth =
-				le32_to_cpu(dt->dt_data_map.cb_group_depth);
-	sbi->layout.mirrors_p1  =
-				le32_to_cpu(dt->dt_data_map.cb_mirror_cnt) + 1;
-	sbi->layout.raid_algorithm  =
-				le32_to_cpu(dt->dt_data_map.cb_raid_algorithm);
-
-	ret = ore_verify_layout(numdevs, &sbi->layout);
-
-	EXOFS_DBGMSG("exofs: layout: "
-		"num_comps=%u stripe_unit=0x%x group_width=%u "
-		"group_depth=0x%llx mirrors_p1=%u raid_algorithm=%u\n",
-		numdevs,
-		sbi->layout.stripe_unit,
-		sbi->layout.group_width,
-		_LLU(sbi->layout.group_depth),
-		sbi->layout.mirrors_p1,
-		sbi->layout.raid_algorithm);
-	return ret;
-}
-
-static unsigned __ra_pages(struct ore_layout *layout)
-{
-	const unsigned _MIN_RA = 32; /* min 128K read-ahead */
-	unsigned ra_pages = layout->group_width * layout->stripe_unit /
-				PAGE_SIZE;
-	unsigned max_io_pages = exofs_max_io_pages(layout, ~0);
-
-	ra_pages *= 2; /* two stripes */
-	if (ra_pages < _MIN_RA)
-		ra_pages = roundup(_MIN_RA, ra_pages / 2);
-
-	if (ra_pages > max_io_pages)
-		ra_pages = max_io_pages;
-
-	return ra_pages;
-}
-
-/* @odi is valid only as long as @fscb_dev is valid */
-static int exofs_devs_2_odi(struct exofs_dt_device_info *dt_dev,
-			     struct osd_dev_info *odi)
-{
-	odi->systemid_len = le32_to_cpu(dt_dev->systemid_len);
-	if (likely(odi->systemid_len))
-		memcpy(odi->systemid, dt_dev->systemid, OSD_SYSTEMID_LEN);
-
-	odi->osdname_len = le32_to_cpu(dt_dev->osdname_len);
-	odi->osdname = dt_dev->osdname;
-
-	/* FIXME support long names. Will need a _put function */
-	if (dt_dev->long_name_offset)
-		return -EINVAL;
-
-	/* Make sure osdname is printable!
-	 * mkexofs should give us space for a null-terminator else the
-	 * device-table is invalid.
-	 */
-	if (unlikely(odi->osdname_len >= sizeof(dt_dev->osdname)))
-		odi->osdname_len = sizeof(dt_dev->osdname) - 1;
-	dt_dev->osdname[odi->osdname_len] = 0;
-
-	/* If it's all zeros something is bad we read past end-of-obj */
-	return !(odi->systemid_len || odi->osdname_len);
-}
-
-static int __alloc_dev_table(struct exofs_sb_info *sbi, unsigned numdevs,
-		      struct exofs_dev **peds)
-{
-	/* Twice bigger table: See exofs_init_comps() and comment at
-	 * exofs_read_lookup_dev_table()
-	 */
-	const size_t numores = numdevs * 2 - 1;
-	struct exofs_dev *eds;
-	unsigned i;
-
-	sbi->oc.ods = kzalloc(numores * sizeof(struct ore_dev *) +
-			      numdevs * sizeof(struct exofs_dev), GFP_KERNEL);
-	if (unlikely(!sbi->oc.ods)) {
-		EXOFS_ERR("ERROR: failed allocating Device array[%d]\n",
-			  numdevs);
-		return -ENOMEM;
-	}
-
-	/* Start of allocated struct exofs_dev entries */
-	*peds = eds = (void *)sbi->oc.ods[numores];
-	/* Initialize pointers into struct exofs_dev */
-	for (i = 0; i < numdevs; ++i)
-		sbi->oc.ods[i] = &eds[i].ored;
-	return 0;
-}
-
-static int exofs_read_lookup_dev_table(struct exofs_sb_info *sbi,
-				       struct osd_dev *fscb_od,
-				       unsigned table_count)
-{
-	struct ore_comp comp;
-	struct exofs_device_table *dt;
-	struct exofs_dev *eds;
-	unsigned table_bytes = table_count * sizeof(dt->dt_dev_table[0]) +
-					     sizeof(*dt);
-	unsigned numdevs, i;
-	int ret;
-
-	dt = kmalloc(table_bytes, GFP_KERNEL);
-	if (unlikely(!dt)) {
-		EXOFS_ERR("ERROR: allocating %x bytes for device table\n",
-			  table_bytes);
-		return -ENOMEM;
-	}
-
-	sbi->oc.numdevs = 0;
-
-	comp.obj.partition = sbi->one_comp.obj.partition;
-	comp.obj.id = EXOFS_DEVTABLE_ID;
-	exofs_make_credential(comp.cred, &comp.obj);
-
-	ret = exofs_read_kern(fscb_od, comp.cred, &comp.obj, 0, dt,
-			      table_bytes);
-	if (unlikely(ret)) {
-		EXOFS_ERR("ERROR: reading device table\n");
-		goto out;
-	}
-
-	numdevs = le64_to_cpu(dt->dt_num_devices);
-	if (unlikely(!numdevs)) {
-		ret = -EINVAL;
-		goto out;
-	}
-	WARN_ON(table_count != numdevs);
-
-	ret = _read_and_match_data_map(sbi, numdevs, dt);
-	if (unlikely(ret))
-		goto out;
-
-	ret = __alloc_dev_table(sbi, numdevs, &eds);
-	if (unlikely(ret))
-		goto out;
-	/* exofs round-robins the device table view according to inode
-	 * number. We hold a: twice bigger table hence inodes can point
-	 * to any device and have a sequential view of the table
-	 * starting at this device. See exofs_init_comps()
-	 */
-	memcpy(&sbi->oc.ods[numdevs], &sbi->oc.ods[0],
-		(numdevs - 1) * sizeof(sbi->oc.ods[0]));
-
-	/* create sysfs subdir under which we put the device table
-	 * And cluster layout. A Superblock is identified by the string:
-	 *	"dev[0].osdname"_"pid"
-	 */
-	exofs_sysfs_sb_add(sbi, &dt->dt_dev_table[0]);
-
-	for (i = 0; i < numdevs; i++) {
-		struct exofs_fscb fscb;
-		struct osd_dev_info odi;
-		struct osd_dev *od;
-
-		if (exofs_devs_2_odi(&dt->dt_dev_table[i], &odi)) {
-			EXOFS_ERR("ERROR: Read all-zeros device entry\n");
-			ret = -EINVAL;
-			goto out;
-		}
-
-		printk(KERN_NOTICE "Add device[%d]: osd_name-%s\n",
-		       i, odi.osdname);
-
-		/* the exofs id is currently the table index */
-		eds[i].did = i;
-
-		/* On all devices the device table is identical. The user can
-		 * specify any one of the participating devices on the command
-		 * line. We always keep them in device-table order.
-		 */
-		if (fscb_od && osduld_device_same(fscb_od, &odi)) {
-			eds[i].ored.od = fscb_od;
-			++sbi->oc.numdevs;
-			fscb_od = NULL;
-			exofs_sysfs_odev_add(&eds[i], sbi);
-			continue;
-		}
-
-		od = osduld_info_lookup(&odi);
-		if (IS_ERR(od)) {
-			ret = PTR_ERR(od);
-			EXOFS_ERR("ERROR: device requested is not found "
-				  "osd_name-%s =>%d\n", odi.osdname, ret);
-			goto out;
-		}
-
-		eds[i].ored.od = od;
-		++sbi->oc.numdevs;
-
-		/* Read the fscb of the other devices to make sure the FS
-		 * partition is there.
-		 */
-		ret = exofs_read_kern(od, comp.cred, &comp.obj, 0, &fscb,
-				      sizeof(fscb));
-		if (unlikely(ret)) {
-			EXOFS_ERR("ERROR: Malformed participating device "
-				  "error reading fscb osd_name-%s\n",
-				  odi.osdname);
-			goto out;
-		}
-		exofs_sysfs_odev_add(&eds[i], sbi);
-
-		/* TODO: verify other information is correct and FS-uuid
-		 *	 matches. Benny what did you say about device table
-		 *	 generation and old devices?
-		 */
-	}
-
-out:
-	kfree(dt);
-	if (unlikely(fscb_od && !ret)) {
-			EXOFS_ERR("ERROR: Bad device-table container device not present\n");
-			osduld_put_device(fscb_od);
-			return -EINVAL;
-	}
-	return ret;
-}
-
-/*
- * Read the superblock from the OSD and fill in the fields
- */
-static int exofs_fill_super(struct super_block *sb,
-				struct exofs_mountopt *opts,
-				struct exofs_sb_info *sbi,
-				int silent)
-{
-	struct inode *root;
-	struct osd_dev *od;		/* Master device                 */
-	struct exofs_fscb fscb;		/*on-disk superblock info        */
-	struct ore_comp comp;
-	unsigned table_count;
-	int ret;
-
-	/* use mount options to fill superblock */
-	if (opts->is_osdname) {
-		struct osd_dev_info odi = {.systemid_len = 0};
-
-		odi.osdname_len = strlen(opts->dev_name);
-		odi.osdname = (u8 *)opts->dev_name;
-		od = osduld_info_lookup(&odi);
-		kfree(opts->dev_name);
-		opts->dev_name = NULL;
-	} else {
-		od = osduld_path_lookup(opts->dev_name);
-	}
-	if (IS_ERR(od)) {
-		ret = -EINVAL;
-		goto free_sbi;
-	}
-
-	/* Default layout in case we do not have a device-table */
-	sbi->layout.stripe_unit = PAGE_SIZE;
-	sbi->layout.mirrors_p1 = 1;
-	sbi->layout.group_width = 1;
-	sbi->layout.group_depth = -1;
-	sbi->layout.group_count = 1;
-	sbi->s_timeout = opts->timeout;
-
-	sbi->one_comp.obj.partition = opts->pid;
-	sbi->one_comp.obj.id = 0;
-	exofs_make_credential(sbi->one_comp.cred, &sbi->one_comp.obj);
-	sbi->oc.single_comp = EC_SINGLE_COMP;
-	sbi->oc.comps = &sbi->one_comp;
-
-	/* fill in some other data by hand */
-	memset(sb->s_id, 0, sizeof(sb->s_id));
-	strcpy(sb->s_id, "exofs");
-	sb->s_blocksize = EXOFS_BLKSIZE;
-	sb->s_blocksize_bits = EXOFS_BLKSHIFT;
-	sb->s_maxbytes = MAX_LFS_FILESIZE;
-	sb->s_max_links = EXOFS_LINK_MAX;
-	atomic_set(&sbi->s_curr_pending, 0);
-	sb->s_bdev = NULL;
-	sb->s_dev = 0;
-
-	comp.obj.partition = sbi->one_comp.obj.partition;
-	comp.obj.id = EXOFS_SUPER_ID;
-	exofs_make_credential(comp.cred, &comp.obj);
-
-	ret = exofs_read_kern(od, comp.cred, &comp.obj, 0, &fscb, sizeof(fscb));
-	if (unlikely(ret))
-		goto free_sbi;
-
-	sb->s_magic = le16_to_cpu(fscb.s_magic);
-	/* NOTE: we read below to be backward compatible with old versions */
-	sbi->s_nextid = le64_to_cpu(fscb.s_nextid);
-	sbi->s_numfiles = le32_to_cpu(fscb.s_numfiles);
-
-	/* make sure what we read from the object store is correct */
-	if (sb->s_magic != EXOFS_SUPER_MAGIC) {
-		if (!silent)
-			EXOFS_ERR("ERROR: Bad magic value\n");
-		ret = -EINVAL;
-		goto free_sbi;
-	}
-	if (le32_to_cpu(fscb.s_version) > EXOFS_FSCB_VER) {
-		EXOFS_ERR("ERROR: Bad FSCB version expected-%d got-%d\n",
-			  EXOFS_FSCB_VER, le32_to_cpu(fscb.s_version));
-		ret = -EINVAL;
-		goto free_sbi;
-	}
-
-	/* start generation numbers from a random point */
-	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
-	spin_lock_init(&sbi->s_next_gen_lock);
-
-	table_count = le64_to_cpu(fscb.s_dev_table_count);
-	if (table_count) {
-		ret = exofs_read_lookup_dev_table(sbi, od, table_count);
-		if (unlikely(ret))
-			goto free_sbi;
-	} else {
-		struct exofs_dev *eds;
-
-		ret = __alloc_dev_table(sbi, 1, &eds);
-		if (unlikely(ret))
-			goto free_sbi;
-
-		ore_comp_set_dev(&sbi->oc, 0, od);
-		sbi->oc.numdevs = 1;
-	}
-
-	__sbi_read_stats(sbi);
-
-	/* set up operation vectors */
-	ret = super_setup_bdi(sb);
-	if (ret) {
-		EXOFS_DBGMSG("Failed to super_setup_bdi\n");
-		goto free_sbi;
-	}
-	sb->s_bdi->ra_pages = __ra_pages(&sbi->layout);
-	sb->s_fs_info = sbi;
-	sb->s_op = &exofs_sops;
-	sb->s_export_op = &exofs_export_ops;
-	root = exofs_iget(sb, EXOFS_ROOT_ID - EXOFS_OBJ_OFF);
-	if (IS_ERR(root)) {
-		EXOFS_ERR("ERROR: exofs_iget failed\n");
-		ret = PTR_ERR(root);
-		goto free_sbi;
-	}
-	sb->s_root = d_make_root(root);
-	if (!sb->s_root) {
-		EXOFS_ERR("ERROR: get root inode failed\n");
-		ret = -ENOMEM;
-		goto free_sbi;
-	}
-
-	if (!S_ISDIR(root->i_mode)) {
-		dput(sb->s_root);
-		sb->s_root = NULL;
-		EXOFS_ERR("ERROR: corrupt root inode (mode = %hd)\n",
-		       root->i_mode);
-		ret = -EINVAL;
-		goto free_sbi;
-	}
-
-	exofs_sysfs_dbg_print();
-	_exofs_print_device("Mounting", opts->dev_name,
-			    ore_comp_dev(&sbi->oc, 0),
-			    sbi->one_comp.obj.partition);
-	return 0;
-
-free_sbi:
-	EXOFS_ERR("Unable to mount exofs on %s pid=0x%llx err=%d\n",
-		  opts->dev_name, sbi->one_comp.obj.partition, ret);
-	exofs_free_sbi(sbi);
-	return ret;
-}
-
-/*
- * Set up the superblock (calls exofs_fill_super eventually)
- */
-static struct dentry *exofs_mount(struct file_system_type *type,
-			  int flags, const char *dev_name,
-			  void *data)
-{
-	struct super_block *s;
-	struct exofs_mountopt opts;
-	struct exofs_sb_info *sbi;
-	int ret;
-
-	ret = parse_options(data, &opts);
-	if (ret) {
-		kfree(opts.dev_name);
-		return ERR_PTR(ret);
-	}
-
-	sbi = kzalloc(sizeof(*sbi), GFP_KERNEL);
-	if (!sbi) {
-		kfree(opts.dev_name);
-		return ERR_PTR(-ENOMEM);
-	}
-
-	s = sget(type, NULL, set_anon_super, flags, NULL);
-
-	if (IS_ERR(s)) {
-		kfree(opts.dev_name);
-		kfree(sbi);
-		return ERR_CAST(s);
-	}
-
-	if (!opts.dev_name)
-		opts.dev_name = dev_name;
-
-
-	ret = exofs_fill_super(s, &opts, sbi, flags & SB_SILENT ? 1 : 0);
-	if (ret) {
-		deactivate_locked_super(s);
-		return ERR_PTR(ret);
-	}
-	s->s_flags |= SB_ACTIVE;
-	return dget(s->s_root);
-}
-
-/*
- * Return information about the file system state in the buffer.  This is used
- * by the 'df' command, for example.
- */
-static int exofs_statfs(struct dentry *dentry, struct kstatfs *buf)
-{
-	struct super_block *sb = dentry->d_sb;
-	struct exofs_sb_info *sbi = sb->s_fs_info;
-	struct ore_io_state *ios;
-	struct osd_attr attrs[] = {
-		ATTR_DEF(OSD_APAGE_PARTITION_QUOTAS,
-			OSD_ATTR_PQ_CAPACITY_QUOTA, sizeof(__be64)),
-		ATTR_DEF(OSD_APAGE_PARTITION_INFORMATION,
-			OSD_ATTR_PI_USED_CAPACITY, sizeof(__be64)),
-	};
-	uint64_t capacity = ULLONG_MAX;
-	uint64_t used = ULLONG_MAX;
-	int ret;
-
-	ret = ore_get_io_state(&sbi->layout, &sbi->oc, &ios);
-	if (ret) {
-		EXOFS_DBGMSG("ore_get_io_state failed.\n");
-		return ret;
-	}
-
-	ios->in_attr = attrs;
-	ios->in_attr_len = ARRAY_SIZE(attrs);
-
-	ret = ore_read(ios);
-	if (unlikely(ret))
-		goto out;
-
-	ret = extract_attr_from_ios(ios, &attrs[0]);
-	if (likely(!ret)) {
-		capacity = get_unaligned_be64(attrs[0].val_ptr);
-		if (unlikely(!capacity))
-			capacity = ULLONG_MAX;
-	} else
-		EXOFS_DBGMSG("exofs_statfs: get capacity failed.\n");
-
-	ret = extract_attr_from_ios(ios, &attrs[1]);
-	if (likely(!ret))
-		used = get_unaligned_be64(attrs[1].val_ptr);
-	else
-		EXOFS_DBGMSG("exofs_statfs: get used-space failed.\n");
-
-	/* fill in the stats buffer */
-	buf->f_type = EXOFS_SUPER_MAGIC;
-	buf->f_bsize = EXOFS_BLKSIZE;
-	buf->f_blocks = capacity >> 9;
-	buf->f_bfree = (capacity - used) >> 9;
-	buf->f_bavail = buf->f_bfree;
-	buf->f_files = sbi->s_numfiles;
-	buf->f_ffree = EXOFS_MAX_ID - sbi->s_numfiles;
-	buf->f_namelen = EXOFS_NAME_LEN;
-
-out:
-	ore_put_io_state(ios);
-	return ret;
-}
-
-static const struct super_operations exofs_sops = {
-	.alloc_inode    = exofs_alloc_inode,
-	.destroy_inode  = exofs_destroy_inode,
-	.write_inode    = exofs_write_inode,
-	.evict_inode    = exofs_evict_inode,
-	.put_super      = exofs_put_super,
-	.sync_fs	= exofs_sync_fs,
-	.statfs         = exofs_statfs,
-};
-
-/******************************************************************************
- * EXPORT OPERATIONS
- *****************************************************************************/
-
-static struct dentry *exofs_get_parent(struct dentry *child)
-{
-	unsigned long ino = exofs_parent_ino(child);
-
-	if (!ino)
-		return ERR_PTR(-ESTALE);
-
-	return d_obtain_alias(exofs_iget(child->d_sb, ino));
-}
-
-static struct inode *exofs_nfs_get_inode(struct super_block *sb,
-		u64 ino, u32 generation)
-{
-	struct inode *inode;
-
-	inode = exofs_iget(sb, ino);
-	if (IS_ERR(inode))
-		return ERR_CAST(inode);
-	if (generation && inode->i_generation != generation) {
-		/* we didn't find the right inode.. */
-		iput(inode);
-		return ERR_PTR(-ESTALE);
-	}
-	return inode;
-}
-
-static struct dentry *exofs_fh_to_dentry(struct super_block *sb,
-				struct fid *fid, int fh_len, int fh_type)
-{
-	return generic_fh_to_dentry(sb, fid, fh_len, fh_type,
-				    exofs_nfs_get_inode);
-}
-
-static struct dentry *exofs_fh_to_parent(struct super_block *sb,
-				struct fid *fid, int fh_len, int fh_type)
-{
-	return generic_fh_to_parent(sb, fid, fh_len, fh_type,
-				    exofs_nfs_get_inode);
-}
-
-static const struct export_operations exofs_export_ops = {
-	.fh_to_dentry = exofs_fh_to_dentry,
-	.fh_to_parent = exofs_fh_to_parent,
-	.get_parent = exofs_get_parent,
-};
-
-/******************************************************************************
- * INSMOD/RMMOD
- *****************************************************************************/
-
-/*
- * struct that describes this file system
- */
-static struct file_system_type exofs_type = {
-	.owner          = THIS_MODULE,
-	.name           = "exofs",
-	.mount          = exofs_mount,
-	.kill_sb        = generic_shutdown_super,
-};
-MODULE_ALIAS_FS("exofs");
-
-static int __init init_exofs(void)
-{
-	int err;
-
-	err = init_inodecache();
-	if (err)
-		goto out;
-
-	err = register_filesystem(&exofs_type);
-	if (err)
-		goto out_d;
-
-	/* We don't fail if sysfs creation failed */
-	exofs_sysfs_init();
-
-	return 0;
-out_d:
-	destroy_inodecache();
-out:
-	return err;
-}
-
-static void __exit exit_exofs(void)
-{
-	exofs_sysfs_uninit();
-	unregister_filesystem(&exofs_type);
-	destroy_inodecache();
-}
-
-MODULE_AUTHOR("Avishay Traeger <avishay@gmail.com>");
-MODULE_DESCRIPTION("exofs");
-MODULE_LICENSE("GPL");
-
-module_init(init_exofs)
-module_exit(exit_exofs)
diff --git a/fs/exofs/sys.c b/fs/exofs/sys.c
deleted file mode 100644
index 1f7d5e46cdda..000000000000
--- a/fs/exofs/sys.c
+++ /dev/null
@@ -1,205 +0,0 @@
-/*
- * Copyright (C) 2012
- * Sachin Bhamare <sbhamare@panasas.com>
- * Boaz Harrosh <ooo@electrozaur.com>
- *
- * This file is part of exofs.
- *
- * exofs is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License 2 as published by
- * the Free Software Foundation.
- *
- * exofs is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with exofs; if not, write to the:
- *	Free Software Foundation <licensing@fsf.org>
- */
-
-#include <linux/kobject.h>
-#include <linux/device.h>
-
-#include "exofs.h"
-
-struct odev_attr {
-	struct attribute attr;
-	ssize_t (*show)(struct exofs_dev *, char *);
-	ssize_t (*store)(struct exofs_dev *, const char *, size_t);
-};
-
-static ssize_t odev_attr_show(struct kobject *kobj, struct attribute *attr,
-		char *buf)
-{
-	struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj);
-	struct odev_attr *a = container_of(attr, struct odev_attr, attr);
-
-	return a->show ? a->show(edp, buf) : 0;
-}
-
-static ssize_t odev_attr_store(struct kobject *kobj, struct attribute *attr,
-		const char *buf, size_t len)
-{
-	struct exofs_dev *edp = container_of(kobj, struct exofs_dev, ed_kobj);
-	struct odev_attr *a = container_of(attr, struct odev_attr, attr);
-
-	return a->store ? a->store(edp, buf, len) : len;
-}
-
-static const struct sysfs_ops odev_attr_ops = {
-	.show  = odev_attr_show,
-	.store = odev_attr_store,
-};
-
-
-static struct kset *exofs_kset;
-
-static ssize_t osdname_show(struct exofs_dev *edp, char *buf)
-{
-	struct osd_dev *odev = edp->ored.od;
-	const struct osd_dev_info *odi = osduld_device_info(odev);
-
-	return snprintf(buf, odi->osdname_len + 1, "%s", odi->osdname);
-}
-
-static ssize_t systemid_show(struct exofs_dev *edp, char *buf)
-{
-	struct osd_dev *odev = edp->ored.od;
-	const struct osd_dev_info *odi = osduld_device_info(odev);
-
-	memcpy(buf, odi->systemid, odi->systemid_len);
-	return odi->systemid_len;
-}
-
-static ssize_t uri_show(struct exofs_dev *edp, char *buf)
-{
-	return snprintf(buf, edp->urilen, "%s", edp->uri);
-}
-
-static ssize_t uri_store(struct exofs_dev *edp, const char *buf, size_t len)
-{
-	uint8_t *new_uri;
-
-	edp->urilen = strlen(buf) + 1;
-	new_uri = krealloc(edp->uri, edp->urilen, GFP_KERNEL);
-	if (new_uri == NULL)
-		return -ENOMEM;
-	edp->uri = new_uri;
-	strncpy(edp->uri, buf, edp->urilen);
-	return edp->urilen;
-}
-
-#define OSD_ATTR(name, mode, show, store) \
-	static struct odev_attr odev_attr_##name = \
-					__ATTR(name, mode, show, store)
-
-OSD_ATTR(osdname, S_IRUGO, osdname_show, NULL);
-OSD_ATTR(systemid, S_IRUGO, systemid_show, NULL);
-OSD_ATTR(uri, S_IRWXU, uri_show, uri_store);
-
-static struct attribute *odev_attrs[] = {
-	&odev_attr_osdname.attr,
-	&odev_attr_systemid.attr,
-	&odev_attr_uri.attr,
-	NULL,
-};
-
-static struct kobj_type odev_ktype = {
-	.default_attrs	= odev_attrs,
-	.sysfs_ops	= &odev_attr_ops,
-};
-
-static struct kobj_type uuid_ktype = {
-};
-
-void exofs_sysfs_dbg_print(void)
-{
-#ifdef CONFIG_EXOFS_DEBUG
-	struct kobject *k_name, *k_tmp;
-
-	list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) {
-		printk(KERN_INFO "%s: name %s ref %d\n",
-			__func__, kobject_name(k_name),
-			(int)kref_read(&k_name->kref));
-	}
-#endif
-}
-/*
- * This function removes all kobjects under exofs_kset
- * At the end of it, exofs_kset kobject will have a refcount
- * of 1 which gets decremented only on exofs module unload
- */
-void exofs_sysfs_sb_del(struct exofs_sb_info *sbi)
-{
-	struct kobject *k_name, *k_tmp;
-	struct kobject *s_kobj = &sbi->s_kobj;
-
-	list_for_each_entry_safe(k_name, k_tmp, &exofs_kset->list, entry) {
-		/* Remove all that are children of this SBI */
-		if (k_name->parent == s_kobj)
-			kobject_put(k_name);
-	}
-	kobject_put(s_kobj);
-}
-
-/*
- * This function creates sysfs entries to hold the current exofs cluster
- * instance (uniquely identified by osdname,pid tuple).
- * This function gets called once per exofs mount instance.
- */
-int exofs_sysfs_sb_add(struct exofs_sb_info *sbi,
-		       struct exofs_dt_device_info *dt_dev)
-{
-	struct kobject *s_kobj;
-	int retval = 0;
-	uint64_t pid = sbi->one_comp.obj.partition;
-
-	/* allocate new uuid dirent */
-	s_kobj = &sbi->s_kobj;
-	s_kobj->kset = exofs_kset;
-	retval = kobject_init_and_add(s_kobj, &uuid_ktype,
-			&exofs_kset->kobj,  "%s_%llx", dt_dev->osdname, pid);
-	if (retval) {
-		EXOFS_ERR("ERROR: Failed to create sysfs entry for "
-			  "uuid-%s_%llx => %d\n", dt_dev->osdname, pid, retval);
-		return -ENOMEM;
-	}
-	return 0;
-}
-
-int exofs_sysfs_odev_add(struct exofs_dev *edev, struct exofs_sb_info *sbi)
-{
-	struct kobject *d_kobj;
-	int retval = 0;
-
-	/* create osd device group which contains following attributes
-	 * osdname, systemid & uri
-	 */
-	d_kobj = &edev->ed_kobj;
-	d_kobj->kset = exofs_kset;
-	retval = kobject_init_and_add(d_kobj, &odev_ktype,
-			&sbi->s_kobj, "dev%u", edev->did);
-	if (retval) {
-		EXOFS_ERR("ERROR: Failed to create sysfs entry for "
-				"device dev%u\n", edev->did);
-		return retval;
-	}
-	return 0;
-}
-
-int exofs_sysfs_init(void)
-{
-	exofs_kset = kset_create_and_add("exofs", NULL, fs_kobj);
-	if (!exofs_kset) {
-		EXOFS_ERR("ERROR: kset_create_and_add exofs failed\n");
-		return -ENOMEM;
-	}
-	return 0;
-}
-
-void exofs_sysfs_uninit(void)
-{
-	kset_unregister(exofs_kset);
-}
diff --git a/fs/exportfs/Makefile b/fs/exportfs/Makefile
index d7c5d4ddb34b..a04a8af83efd 100644
--- a/fs/exportfs/Makefile
+++ b/fs/exportfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the filesystem export support routines.
 
diff --git a/fs/exportfs/expfs.c b/fs/exportfs/expfs.c
index c69927bed4ef..f0e549783caf 100644
--- a/fs/exportfs/expfs.c
+++ b/fs/exportfs/expfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Neil Brown 2002
  * Copyright (C) Christoph Hellwig 2007
diff --git a/fs/ext2/Kconfig b/fs/ext2/Kconfig
index 894e4c53d1d2..54eec9185627 100644
--- a/fs/ext2/Kconfig
+++ b/fs/ext2/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config EXT2_FS
 	tristate "Second extended fs support"
 	help
diff --git a/fs/ext2/balloc.c b/fs/ext2/balloc.c
index 33db13365c5e..547c165299c0 100644
--- a/fs/ext2/balloc.c
+++ b/fs/ext2/balloc.c
@@ -1197,7 +1197,7 @@ static int ext2_has_free_blocks(struct ext2_sb_info *sbi)
 
 /*
  * Returns 1 if the passed-in block region is valid; 0 if some part overlaps
- * with filesystem metadata blocksi.
+ * with filesystem metadata blocks.
  */
 int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
 			  unsigned int count)
@@ -1212,7 +1212,6 @@ int ext2_data_block_valid(struct ext2_sb_info *sbi, ext2_fsblk_t start_blk,
 	    (start_blk + count >= sbi->s_sb_block))
 		return 0;
 
-
 	return 1;
 }
 
diff --git a/fs/ext2/dir.c b/fs/ext2/dir.c
index 3b8114def693..13318e255ebf 100644
--- a/fs/ext2/dir.c
+++ b/fs/ext2/dir.c
@@ -252,33 +252,10 @@ ext2_validate_entry(char *base, unsigned offset, unsigned mask)
 	return (char *)p - base;
 }
 
-static unsigned char ext2_filetype_table[EXT2_FT_MAX] = {
-	[EXT2_FT_UNKNOWN]	= DT_UNKNOWN,
-	[EXT2_FT_REG_FILE]	= DT_REG,
-	[EXT2_FT_DIR]		= DT_DIR,
-	[EXT2_FT_CHRDEV]	= DT_CHR,
-	[EXT2_FT_BLKDEV]	= DT_BLK,
-	[EXT2_FT_FIFO]		= DT_FIFO,
-	[EXT2_FT_SOCK]		= DT_SOCK,
-	[EXT2_FT_SYMLINK]	= DT_LNK,
-};
-
-#define S_SHIFT 12
-static unsigned char ext2_type_by_mode[S_IFMT >> S_SHIFT] = {
-	[S_IFREG >> S_SHIFT]	= EXT2_FT_REG_FILE,
-	[S_IFDIR >> S_SHIFT]	= EXT2_FT_DIR,
-	[S_IFCHR >> S_SHIFT]	= EXT2_FT_CHRDEV,
-	[S_IFBLK >> S_SHIFT]	= EXT2_FT_BLKDEV,
-	[S_IFIFO >> S_SHIFT]	= EXT2_FT_FIFO,
-	[S_IFSOCK >> S_SHIFT]	= EXT2_FT_SOCK,
-	[S_IFLNK >> S_SHIFT]	= EXT2_FT_SYMLINK,
-};
-
 static inline void ext2_set_de_type(ext2_dirent *de, struct inode *inode)
 {
-	umode_t mode = inode->i_mode;
 	if (EXT2_HAS_INCOMPAT_FEATURE(inode->i_sb, EXT2_FEATURE_INCOMPAT_FILETYPE))
-		de->file_type = ext2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
+		de->file_type = fs_umode_to_ftype(inode->i_mode);
 	else
 		de->file_type = 0;
 }
@@ -293,14 +270,14 @@ ext2_readdir(struct file *file, struct dir_context *ctx)
 	unsigned long n = pos >> PAGE_SHIFT;
 	unsigned long npages = dir_pages(inode);
 	unsigned chunk_mask = ~(ext2_chunk_size(inode)-1);
-	unsigned char *types = NULL;
 	bool need_revalidate = !inode_eq_iversion(inode, file->f_version);
+	bool has_filetype;
 
 	if (pos > inode->i_size - EXT2_DIR_REC_LEN(1))
 		return 0;
 
-	if (EXT2_HAS_INCOMPAT_FEATURE(sb, EXT2_FEATURE_INCOMPAT_FILETYPE))
-		types = ext2_filetype_table;
+	has_filetype =
+		EXT2_HAS_INCOMPAT_FEATURE(sb, EXT2_FEATURE_INCOMPAT_FILETYPE);
 
 	for ( ; n < npages; n++, offset = 0) {
 		char *kaddr, *limit;
@@ -335,8 +312,8 @@ ext2_readdir(struct file *file, struct dir_context *ctx)
 			if (de->inode) {
 				unsigned char d_type = DT_UNKNOWN;
 
-				if (types && de->file_type < EXT2_FT_MAX)
-					d_type = types[de->file_type];
+				if (has_filetype)
+					d_type = fs_ftype_to_dtype(de->file_type);
 
 				if (!dir_emit(ctx, de->name, de->name_len,
 						le32_to_cpu(de->inode),
diff --git a/fs/ext2/ext2.h b/fs/ext2/ext2.h
index e770cd100a6a..10ab238de9a6 100644
--- a/fs/ext2/ext2.h
+++ b/fs/ext2/ext2.h
@@ -604,22 +604,6 @@ struct ext2_dir_entry_2 {
 };
 
 /*
- * Ext2 directory file types.  Only the low 3 bits are used.  The
- * other bits are reserved for now.
- */
-enum {
-	EXT2_FT_UNKNOWN		= 0,
-	EXT2_FT_REG_FILE	= 1,
-	EXT2_FT_DIR		= 2,
-	EXT2_FT_CHRDEV		= 3,
-	EXT2_FT_BLKDEV		= 4,
-	EXT2_FT_FIFO		= 5,
-	EXT2_FT_SOCK		= 6,
-	EXT2_FT_SYMLINK		= 7,
-	EXT2_FT_MAX
-};
-
-/*
  * EXT2_DIR_PAD defines the directory entries boundaries
  *
  * NOTE: It must be a multiple of 4
@@ -774,6 +758,7 @@ extern int ext2_write_inode (struct inode *, struct writeback_control *);
 extern void ext2_evict_inode(struct inode *);
 extern int ext2_get_block(struct inode *, sector_t, struct buffer_head *, int);
 extern int ext2_setattr (struct dentry *, struct iattr *);
+extern int ext2_getattr (const struct path *, struct kstat *, u32, unsigned int);
 extern void ext2_set_inode_flags(struct inode *inode);
 extern int ext2_fiemap(struct inode *inode, struct fiemap_extent_info *fieinfo,
 		       u64 start, u64 len);
diff --git a/fs/ext2/file.c b/fs/ext2/file.c
index 28b2609f25c1..39c4772e96c9 100644
--- a/fs/ext2/file.c
+++ b/fs/ext2/file.c
@@ -199,6 +199,7 @@ const struct inode_operations ext2_file_inode_operations = {
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
 #endif
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 	.get_acl	= ext2_get_acl,
 	.set_acl	= ext2_set_acl,
diff --git a/fs/ext2/ialloc.c b/fs/ext2/ialloc.c
index 5c3d7b7e4975..fda7d3f5b4be 100644
--- a/fs/ext2/ialloc.c
+++ b/fs/ext2/ialloc.c
@@ -172,9 +172,7 @@ static void ext2_preread_inode(struct inode *inode)
 	struct backing_dev_info *bdi;
 
 	bdi = inode_to_bdi(inode);
-	if (bdi_read_congested(bdi))
-		return;
-	if (bdi_write_congested(bdi))
+	if (bdi_rw_congested(bdi))
 		return;
 
 	block_group = (inode->i_ino - 1) / EXT2_INODES_PER_GROUP(inode->i_sb);
@@ -222,8 +220,6 @@ static int find_group_dir(struct super_block *sb, struct inode *parent)
 			best_desc = desc;
 		}
 	}
-	if (!best_desc)
-		return -1;
 
 	return best_group;
 }
@@ -513,6 +509,7 @@ repeat_in_this_group:
 	/*
 	 * Scanned all blockgroups.
 	 */
+	brelse(bitmap_bh);
 	err = -ENOSPC;
 	goto fail;
 got:
diff --git a/fs/ext2/inode.c b/fs/ext2/inode.c
index e4bb9386c045..7004ce581a32 100644
--- a/fs/ext2/inode.c
+++ b/fs/ext2/inode.c
@@ -451,7 +451,9 @@ failed_out:
 /**
  *	ext2_alloc_branch - allocate and set up a chain of blocks.
  *	@inode: owner
- *	@num: depth of the chain (number of blocks to allocate)
+ *	@indirect_blks: depth of the chain (number of blocks to allocate)
+ *	@blks: number of allocated direct blocks
+ *	@goal: preferred place for allocation
  *	@offsets: offsets (in the blocks) to store the pointers to next.
  *	@branch: place to store the chain in.
  *
@@ -717,7 +719,7 @@ static int ext2_get_blocks(struct inode *inode,
 	/* the number of blocks need to allocate for [d,t]indirect blocks */
 	indirect_blks = (chain + depth) - partial - 1;
 	/*
-	 * Next look up the indirect map to count the totoal number of
+	 * Next look up the indirect map to count the total number of
 	 * direct blocks to allocate for this branch.
 	 */
 	count = ext2_blks_to_allocate(partial, indirect_blks,
@@ -1239,6 +1241,7 @@ do_indirects:
 				mark_inode_dirty(inode);
 				ext2_free_branches(inode, &nr, &nr+1, 1);
 			}
+			/* fall through */
 		case EXT2_IND_BLOCK:
 			nr = i_data[EXT2_DIND_BLOCK];
 			if (nr) {
@@ -1246,6 +1249,7 @@ do_indirects:
 				mark_inode_dirty(inode);
 				ext2_free_branches(inode, &nr, &nr+1, 2);
 			}
+			/* fall through */
 		case EXT2_DIND_BLOCK:
 			nr = i_data[EXT2_TIND_BLOCK];
 			if (nr) {
@@ -1396,7 +1400,7 @@ void ext2_set_file_ops(struct inode *inode)
 struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
 {
 	struct ext2_inode_info *ei;
-	struct buffer_head * bh;
+	struct buffer_head * bh = NULL;
 	struct ext2_inode *raw_inode;
 	struct inode *inode;
 	long ret = -EIO;
@@ -1442,7 +1446,6 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
 	 */
 	if (inode->i_nlink == 0 && (inode->i_mode == 0 || ei->i_dtime)) {
 		/* this inode is deleted */
-		brelse (bh);
 		ret = -ESTALE;
 		goto bad_inode;
 	}
@@ -1459,7 +1462,6 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
 	    !ext2_data_block_valid(EXT2_SB(sb), ei->i_file_acl, 1)) {
 		ext2_error(sb, "ext2_iget", "bad extended attribute block %u",
 			   ei->i_file_acl);
-		brelse(bh);
 		ret = -EFSCORRUPTED;
 		goto bad_inode;
 	}
@@ -1522,6 +1524,7 @@ struct inode *ext2_iget (struct super_block *sb, unsigned long ino)
 	return inode;
 	
 bad_inode:
+	brelse(bh);
 	iget_failed(inode);
 	return ERR_PTR(ret);
 }
@@ -1635,6 +1638,32 @@ int ext2_write_inode(struct inode *inode, struct writeback_control *wbc)
 	return __ext2_write_inode(inode, wbc->sync_mode == WB_SYNC_ALL);
 }
 
+int ext2_getattr(const struct path *path, struct kstat *stat,
+		u32 request_mask, unsigned int query_flags)
+{
+	struct inode *inode = d_inode(path->dentry);
+	struct ext2_inode_info *ei = EXT2_I(inode);
+	unsigned int flags;
+
+	flags = ei->i_flags & EXT2_FL_USER_VISIBLE;
+	if (flags & EXT2_APPEND_FL)
+		stat->attributes |= STATX_ATTR_APPEND;
+	if (flags & EXT2_COMPR_FL)
+		stat->attributes |= STATX_ATTR_COMPRESSED;
+	if (flags & EXT2_IMMUTABLE_FL)
+		stat->attributes |= STATX_ATTR_IMMUTABLE;
+	if (flags & EXT2_NODUMP_FL)
+		stat->attributes |= STATX_ATTR_NODUMP;
+	stat->attributes_mask |= (STATX_ATTR_APPEND |
+			STATX_ATTR_COMPRESSED |
+			STATX_ATTR_ENCRYPTED |
+			STATX_ATTR_IMMUTABLE |
+			STATX_ATTR_NODUMP);
+
+	generic_fillattr(inode, stat);
+	return 0;
+}
+
 int ext2_setattr(struct dentry *dentry, struct iattr *iattr)
 {
 	struct inode *inode = d_inode(dentry);
diff --git a/fs/ext2/ioctl.c b/fs/ext2/ioctl.c
index 0367c0039e68..1b853fb0b163 100644
--- a/fs/ext2/ioctl.c
+++ b/fs/ext2/ioctl.c
@@ -60,18 +60,10 @@ long ext2_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		}
 		oldflags = ei->i_flags;
 
-		/*
-		 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
-		 * the relevant capability.
-		 *
-		 * This test looks nicer. Thanks to Pauline Middelink
-		 */
-		if ((flags ^ oldflags) & (EXT2_APPEND_FL | EXT2_IMMUTABLE_FL)) {
-			if (!capable(CAP_LINUX_IMMUTABLE)) {
-				inode_unlock(inode);
-				ret = -EPERM;
-				goto setflags_out;
-			}
+		ret = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+		if (ret) {
+			inode_unlock(inode);
+			goto setflags_out;
 		}
 
 		flags = flags & EXT2_FL_USER_MODIFIABLE;
diff --git a/fs/ext2/namei.c b/fs/ext2/namei.c
index 0c26dcc5d850..ccfbbf59e2fc 100644
--- a/fs/ext2/namei.c
+++ b/fs/ext2/namei.c
@@ -416,6 +416,7 @@ const struct inode_operations ext2_dir_inode_operations = {
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
 #endif
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 	.get_acl	= ext2_get_acl,
 	.set_acl	= ext2_set_acl,
@@ -426,6 +427,7 @@ const struct inode_operations ext2_special_inode_operations = {
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
 #endif
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 	.get_acl	= ext2_get_acl,
 	.set_acl	= ext2_set_acl,
diff --git a/fs/ext2/super.c b/fs/ext2/super.c
index 73b2d528237f..44eb6e7eb492 100644
--- a/fs/ext2/super.c
+++ b/fs/ext2/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/ext2/super.c
  *
@@ -192,17 +193,11 @@ static struct inode *ext2_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void ext2_i_callback(struct rcu_head *head)
+static void ext2_free_in_core_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(ext2_inode_cachep, EXT2_I(inode));
 }
 
-static void ext2_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, ext2_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct ext2_inode_info *ei = (struct ext2_inode_info *) foo;
@@ -308,16 +303,16 @@ static int ext2_show_options(struct seq_file *seq, struct dentry *root)
 	if (test_opt(sb, NOBH))
 		seq_puts(seq, ",nobh");
 
-	if (sbi->s_mount_opt & EXT2_MOUNT_USRQUOTA)
+	if (test_opt(sb, USRQUOTA))
 		seq_puts(seq, ",usrquota");
 
-	if (sbi->s_mount_opt & EXT2_MOUNT_GRPQUOTA)
+	if (test_opt(sb, GRPQUOTA))
 		seq_puts(seq, ",grpquota");
 
-	if (sbi->s_mount_opt & EXT2_MOUNT_XIP)
+	if (test_opt(sb, XIP))
 		seq_puts(seq, ",xip");
 
-	if (sbi->s_mount_opt & EXT2_MOUNT_DAX)
+	if (test_opt(sb, DAX))
 		seq_puts(seq, ",dax");
 
 	if (!test_opt(sb, RESERVATION))
@@ -351,7 +346,7 @@ static const struct quotactl_ops ext2_quotactl_ops = {
 
 static const struct super_operations ext2_sops = {
 	.alloc_inode	= ext2_alloc_inode,
-	.destroy_inode	= ext2_destroy_inode,
+	.free_inode	= ext2_free_in_core_inode,
 	.write_inode	= ext2_write_inode,
 	.evict_inode	= ext2_evict_inode,
 	.put_super	= ext2_put_super,
@@ -757,7 +752,8 @@ static loff_t ext2_max_size(int bits)
 {
 	loff_t res = EXT2_NDIR_BLOCKS;
 	int meta_blocks;
-	loff_t upper_limit;
+	unsigned int upper_limit;
+	unsigned int ppb = 1 << (bits-2);
 
 	/* This is calculated to be the largest file size for a
 	 * dense, file such that the total number of
@@ -771,24 +767,34 @@ static loff_t ext2_max_size(int bits)
 	/* total blocks in file system block size */
 	upper_limit >>= (bits - 9);
 
+	/* Compute how many blocks we can address by block tree */
+	res += 1LL << (bits-2);
+	res += 1LL << (2*(bits-2));
+	res += 1LL << (3*(bits-2));
+	/* Does block tree limit file size? */
+	if (res < upper_limit)
+		goto check_lfs;
 
+	res = upper_limit;
+	/* How many metadata blocks are needed for addressing upper_limit? */
+	upper_limit -= EXT2_NDIR_BLOCKS;
 	/* indirect blocks */
 	meta_blocks = 1;
+	upper_limit -= ppb;
 	/* double indirect blocks */
-	meta_blocks += 1 + (1LL << (bits-2));
-	/* tripple indirect blocks */
-	meta_blocks += 1 + (1LL << (bits-2)) + (1LL << (2*(bits-2)));
-
-	upper_limit -= meta_blocks;
-	upper_limit <<= bits;
-
-	res += 1LL << (bits-2);
-	res += 1LL << (2*(bits-2));
-	res += 1LL << (3*(bits-2));
+	if (upper_limit < ppb * ppb) {
+		meta_blocks += 1 + DIV_ROUND_UP(upper_limit, ppb);
+		res -= meta_blocks;
+		goto check_lfs;
+	}
+	meta_blocks += 1 + ppb;
+	upper_limit -= ppb * ppb;
+	/* tripple indirect blocks for the rest */
+	meta_blocks += 1 + DIV_ROUND_UP(upper_limit, ppb) +
+		DIV_ROUND_UP(upper_limit, ppb*ppb);
+	res -= meta_blocks;
+check_lfs:
 	res <<= bits;
-	if (res > upper_limit)
-		res = upper_limit;
-
 	if (res > MAX_LFS_FILESIZE)
 		res = MAX_LFS_FILESIZE;
 
@@ -929,8 +935,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 	sbi->s_resgid = opts.s_resgid;
 
 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
-		((EXT2_SB(sb)->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ?
-		 SB_POSIXACL : 0);
+		(test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
 	sb->s_iflags |= SB_I_CGROUPWB;
 
 	if (le32_to_cpu(es->s_rev_level) == EXT2_GOOD_OLD_REV &&
@@ -961,11 +966,11 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 
 	blocksize = BLOCK_SIZE << le32_to_cpu(sbi->s_es->s_log_block_size);
 
-	if (sbi->s_mount_opt & EXT2_MOUNT_DAX) {
+	if (test_opt(sb, DAX)) {
 		if (!bdev_dax_supported(sb->s_bdev, blocksize)) {
 			ext2_msg(sb, KERN_ERR,
 				"DAX unsupported by block device. Turning off DAX.");
-			sbi->s_mount_opt &= ~EXT2_MOUNT_DAX;
+			clear_opt(sbi->s_mount_opt, DAX);
 		}
 	}
 
@@ -1024,8 +1029,6 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 	sbi->s_frags_per_group = le32_to_cpu(es->s_frags_per_group);
 	sbi->s_inodes_per_group = le32_to_cpu(es->s_inodes_per_group);
 
-	if (EXT2_INODE_SIZE(sb) == 0)
-		goto cantfind_ext2;
 	sbi->s_inodes_per_block = sb->s_blocksize / EXT2_INODE_SIZE(sb);
 	if (sbi->s_inodes_per_block == 0 || sbi->s_inodes_per_group == 0)
 		goto cantfind_ext2;
@@ -1087,12 +1090,14 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 					   sizeof(struct buffer_head *),
 					   GFP_KERNEL);
 	if (sbi->s_group_desc == NULL) {
+		ret = -ENOMEM;
 		ext2_msg(sb, KERN_ERR, "error: not enough memory");
 		goto failed_mount;
 	}
 	bgl_lock_init(sbi->s_blockgroup_lock);
 	sbi->s_debts = kcalloc(sbi->s_groups_count, sizeof(*sbi->s_debts), GFP_KERNEL);
 	if (!sbi->s_debts) {
+		ret = -ENOMEM;
 		ext2_msg(sb, KERN_ERR, "error: not enough memory");
 		goto failed_mount_group_desc;
 	}
@@ -1148,6 +1153,7 @@ static int ext2_fill_super(struct super_block *sb, void *data, int silent)
 #ifdef CONFIG_EXT2_FS_XATTR
 	sbi->s_ea_block_cache = ext2_xattr_create_cache();
 	if (!sbi->s_ea_block_cache) {
+		ret = -ENOMEM;
 		ext2_msg(sb, KERN_ERR, "Failed to create ea_block_cache");
 		goto failed_mount3;
 	}
@@ -1397,7 +1403,7 @@ out_set:
 	sbi->s_resuid = new_opts.s_resuid;
 	sbi->s_resgid = new_opts.s_resgid;
 	sb->s_flags = (sb->s_flags & ~SB_POSIXACL) |
-		((sbi->s_mount_opt & EXT2_MOUNT_POSIX_ACL) ? SB_POSIXACL : 0);
+		(test_opt(sb, POSIX_ACL) ? SB_POSIXACL : 0);
 	spin_unlock(&sbi->s_lock);
 
 	return 0;
diff --git a/fs/ext2/symlink.c b/fs/ext2/symlink.c
index d5589ddcc281..00cdb8679486 100644
--- a/fs/ext2/symlink.c
+++ b/fs/ext2/symlink.c
@@ -23,6 +23,7 @@
 
 const struct inode_operations ext2_symlink_inode_operations = {
 	.get_link	= page_get_link,
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
@@ -31,6 +32,7 @@ const struct inode_operations ext2_symlink_inode_operations = {
  
 const struct inode_operations ext2_fast_symlink_inode_operations = {
 	.get_link	= simple_get_link,
+	.getattr	= ext2_getattr,
 	.setattr	= ext2_setattr,
 #ifdef CONFIG_EXT2_FS_XATTR
 	.listxattr	= ext2_listxattr,
diff --git a/fs/ext2/xattr.c b/fs/ext2/xattr.c
index 4f30876ee325..79369c13cc55 100644
--- a/fs/ext2/xattr.c
+++ b/fs/ext2/xattr.c
@@ -134,6 +134,53 @@ ext2_xattr_handler(int name_index)
 	return handler;
 }
 
+static bool
+ext2_xattr_header_valid(struct ext2_xattr_header *header)
+{
+	if (header->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
+	    header->h_blocks != cpu_to_le32(1))
+		return false;
+
+	return true;
+}
+
+static bool
+ext2_xattr_entry_valid(struct ext2_xattr_entry *entry,
+		       char *end, size_t end_offs)
+{
+	struct ext2_xattr_entry *next;
+	size_t size;
+
+	next = EXT2_XATTR_NEXT(entry);
+	if ((char *)next >= end)
+		return false;
+
+	if (entry->e_value_block != 0)
+		return false;
+
+	size = le32_to_cpu(entry->e_value_size);
+	if (size > end_offs ||
+	    le16_to_cpu(entry->e_value_offs) + size > end_offs)
+		return false;
+
+	return true;
+}
+
+static int
+ext2_xattr_cmp_entry(int name_index, size_t name_len, const char *name,
+		     struct ext2_xattr_entry *entry)
+{
+	int cmp;
+
+	cmp = name_index - entry->e_name_index;
+	if (!cmp)
+		cmp = name_len - entry->e_name_len;
+	if (!cmp)
+		cmp = memcmp(name, entry->e_name, name_len);
+
+	return cmp;
+}
+
 /*
  * ext2_xattr_get()
  *
@@ -152,7 +199,7 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name,
 	struct ext2_xattr_entry *entry;
 	size_t name_len, size;
 	char *end;
-	int error;
+	int error, not_found;
 	struct mb_cache *ea_block_cache = EA_BLOCK_CACHE(inode);
 
 	ea_idebug(inode, "name=%d.%s, buffer=%p, buffer_size=%ld",
@@ -176,9 +223,9 @@ ext2_xattr_get(struct inode *inode, int name_index, const char *name,
 	ea_bdebug(bh, "b_count=%d, refcount=%d",
 		atomic_read(&(bh->b_count)), le32_to_cpu(HDR(bh)->h_refcount));
 	end = bh->b_data + bh->b_size;
-	if (HDR(bh)->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
-	    HDR(bh)->h_blocks != cpu_to_le32(1)) {
-bad_block:	ext2_error(inode->i_sb, "ext2_xattr_get",
+	if (!ext2_xattr_header_valid(HDR(bh))) {
+bad_block:
+		ext2_error(inode->i_sb, "ext2_xattr_get",
 			"inode %ld: bad block %d", inode->i_ino,
 			EXT2_I(inode)->i_file_acl);
 		error = -EIO;
@@ -188,29 +235,25 @@ bad_block:	ext2_error(inode->i_sb, "ext2_xattr_get",
 	/* find named attribute */
 	entry = FIRST_ENTRY(bh);
 	while (!IS_LAST_ENTRY(entry)) {
-		struct ext2_xattr_entry *next =
-			EXT2_XATTR_NEXT(entry);
-		if ((char *)next >= end)
+		if (!ext2_xattr_entry_valid(entry, end,
+		    inode->i_sb->s_blocksize))
 			goto bad_block;
-		if (name_index == entry->e_name_index &&
-		    name_len == entry->e_name_len &&
-		    memcmp(name, entry->e_name, name_len) == 0)
+
+		not_found = ext2_xattr_cmp_entry(name_index, name_len, name,
+						 entry);
+		if (!not_found)
 			goto found;
-		entry = next;
+		if (not_found < 0)
+			break;
+
+		entry = EXT2_XATTR_NEXT(entry);
 	}
 	if (ext2_xattr_cache_insert(ea_block_cache, bh))
 		ea_idebug(inode, "cache insert failed");
 	error = -ENODATA;
 	goto cleanup;
 found:
-	/* check the buffer size */
-	if (entry->e_value_block != 0)
-		goto bad_block;
 	size = le32_to_cpu(entry->e_value_size);
-	if (size > inode->i_sb->s_blocksize ||
-	    le16_to_cpu(entry->e_value_offs) + size > inode->i_sb->s_blocksize)
-		goto bad_block;
-
 	if (ext2_xattr_cache_insert(ea_block_cache, bh))
 		ea_idebug(inode, "cache insert failed");
 	if (buffer) {
@@ -266,9 +309,9 @@ ext2_xattr_list(struct dentry *dentry, char *buffer, size_t buffer_size)
 	ea_bdebug(bh, "b_count=%d, refcount=%d",
 		atomic_read(&(bh->b_count)), le32_to_cpu(HDR(bh)->h_refcount));
 	end = bh->b_data + bh->b_size;
-	if (HDR(bh)->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
-	    HDR(bh)->h_blocks != cpu_to_le32(1)) {
-bad_block:	ext2_error(inode->i_sb, "ext2_xattr_list",
+	if (!ext2_xattr_header_valid(HDR(bh))) {
+bad_block:
+		ext2_error(inode->i_sb, "ext2_xattr_list",
 			"inode %ld: bad block %d", inode->i_ino,
 			EXT2_I(inode)->i_file_acl);
 		error = -EIO;
@@ -278,11 +321,10 @@ bad_block:	ext2_error(inode->i_sb, "ext2_xattr_list",
 	/* check the on-disk data structure */
 	entry = FIRST_ENTRY(bh);
 	while (!IS_LAST_ENTRY(entry)) {
-		struct ext2_xattr_entry *next = EXT2_XATTR_NEXT(entry);
-
-		if ((char *)next >= end)
+		if (!ext2_xattr_entry_valid(entry, end,
+		    inode->i_sb->s_blocksize))
 			goto bad_block;
-		entry = next;
+		entry = EXT2_XATTR_NEXT(entry);
 	}
 	if (ext2_xattr_cache_insert(ea_block_cache, bh))
 		ea_idebug(inode, "cache insert failed");
@@ -342,6 +384,7 @@ static void ext2_xattr_update_super_block(struct super_block *sb)
 		return;
 
 	spin_lock(&EXT2_SB(sb)->s_lock);
+	ext2_update_dynamic_rev(sb);
 	EXT2_SET_COMPAT_FEATURE(sb, EXT2_FEATURE_COMPAT_EXT_ATTR);
 	spin_unlock(&EXT2_SB(sb)->s_lock);
 	mark_buffer_dirty(EXT2_SB(sb)->s_sbh);
@@ -366,7 +409,7 @@ ext2_xattr_set(struct inode *inode, int name_index, const char *name,
 	struct super_block *sb = inode->i_sb;
 	struct buffer_head *bh = NULL;
 	struct ext2_xattr_header *header = NULL;
-	struct ext2_xattr_entry *here, *last;
+	struct ext2_xattr_entry *here = NULL, *last = NULL;
 	size_t name_len, free, min_offs = sb->s_blocksize;
 	int not_found = 1, error;
 	char *end;
@@ -405,47 +448,39 @@ ext2_xattr_set(struct inode *inode, int name_index, const char *name,
 			le32_to_cpu(HDR(bh)->h_refcount));
 		header = HDR(bh);
 		end = bh->b_data + bh->b_size;
-		if (header->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
-		    header->h_blocks != cpu_to_le32(1)) {
-bad_block:		ext2_error(sb, "ext2_xattr_set",
+		if (!ext2_xattr_header_valid(header)) {
+bad_block:
+			ext2_error(sb, "ext2_xattr_set",
 				"inode %ld: bad block %d", inode->i_ino, 
 				   EXT2_I(inode)->i_file_acl);
 			error = -EIO;
 			goto cleanup;
 		}
-		/* Find the named attribute. */
-		here = FIRST_ENTRY(bh);
-		while (!IS_LAST_ENTRY(here)) {
-			struct ext2_xattr_entry *next = EXT2_XATTR_NEXT(here);
-			if ((char *)next >= end)
-				goto bad_block;
-			if (!here->e_value_block && here->e_value_size) {
-				size_t offs = le16_to_cpu(here->e_value_offs);
-				if (offs < min_offs)
-					min_offs = offs;
-			}
-			not_found = name_index - here->e_name_index;
-			if (!not_found)
-				not_found = name_len - here->e_name_len;
-			if (!not_found)
-				not_found = memcmp(name, here->e_name,name_len);
-			if (not_found <= 0)
-				break;
-			here = next;
-		}
-		last = here;
-		/* We still need to compute min_offs and last. */
+		/*
+		 * Find the named attribute. If not found, 'here' will point
+		 * to entry where the new attribute should be inserted to
+		 * maintain sorting.
+		 */
+		last = FIRST_ENTRY(bh);
 		while (!IS_LAST_ENTRY(last)) {
-			struct ext2_xattr_entry *next = EXT2_XATTR_NEXT(last);
-			if ((char *)next >= end)
+			if (!ext2_xattr_entry_valid(last, end, sb->s_blocksize))
 				goto bad_block;
-			if (!last->e_value_block && last->e_value_size) {
+			if (last->e_value_size) {
 				size_t offs = le16_to_cpu(last->e_value_offs);
 				if (offs < min_offs)
 					min_offs = offs;
 			}
-			last = next;
+			if (not_found > 0) {
+				not_found = ext2_xattr_cmp_entry(name_index,
+								 name_len,
+								 name, last);
+				if (not_found <= 0)
+					here = last;
+			}
+			last = EXT2_XATTR_NEXT(last);
 		}
+		if (not_found > 0)
+			here = last;
 
 		/* Check whether we have enough space left. */
 		free = min_offs - ((char*)last - (char*)header) - sizeof(__u32);
@@ -453,7 +488,6 @@ bad_block:		ext2_error(sb, "ext2_xattr_set",
 		/* We will use a new extended attribute block. */
 		free = sb->s_blocksize -
 			sizeof(struct ext2_xattr_header) - sizeof(__u32);
-		here = last = NULL;  /* avoid gcc uninitialized warning. */
 	}
 
 	if (not_found) {
@@ -469,14 +503,7 @@ bad_block:		ext2_error(sb, "ext2_xattr_set",
 		error = -EEXIST;
 		if (flags & XATTR_CREATE)
 			goto cleanup;
-		if (!here->e_value_block && here->e_value_size) {
-			size_t size = le32_to_cpu(here->e_value_size);
-
-			if (le16_to_cpu(here->e_value_offs) + size > 
-			    sb->s_blocksize || size > sb->s_blocksize)
-				goto bad_block;
-			free += EXT2_XATTR_SIZE(size);
-		}
+		free += EXT2_XATTR_SIZE(le32_to_cpu(here->e_value_size));
 		free += EXT2_XATTR_LEN(name_len);
 	}
 	error = -ENOSPC;
@@ -505,11 +532,10 @@ bad_block:		ext2_error(sb, "ext2_xattr_set",
 
 			unlock_buffer(bh);
 			ea_bdebug(bh, "cloning");
-			header = kmalloc(bh->b_size, GFP_KERNEL);
+			header = kmemdup(HDR(bh), bh->b_size, GFP_KERNEL);
 			error = -ENOMEM;
 			if (header == NULL)
 				goto cleanup;
-			memcpy(header, HDR(bh), bh->b_size);
 			header->h_refcount = cpu_to_le32(1);
 
 			offset = (char *)here - bh->b_data;
@@ -541,7 +567,7 @@ bad_block:		ext2_error(sb, "ext2_xattr_set",
 		here->e_name_len = name_len;
 		memcpy(here->e_name, name, name_len);
 	} else {
-		if (!here->e_value_block && here->e_value_size) {
+		if (here->e_value_size) {
 			char *first_val = (char *)header + min_offs;
 			size_t offs = le16_to_cpu(here->e_value_offs);
 			char *val = (char *)header + offs;
@@ -568,7 +594,7 @@ bad_block:		ext2_error(sb, "ext2_xattr_set",
 			last = ENTRY(header+1);
 			while (!IS_LAST_ENTRY(last)) {
 				size_t o = le16_to_cpu(last->e_value_offs);
-				if (!last->e_value_block && o < offs)
+				if (o < offs)
 					last->e_value_offs =
 						cpu_to_le16(o + size);
 				last = EXT2_XATTR_NEXT(last);
@@ -783,8 +809,7 @@ ext2_xattr_delete_inode(struct inode *inode)
 		goto cleanup;
 	}
 	ea_bdebug(bh, "b_count=%d", atomic_read(&(bh->b_count)));
-	if (HDR(bh)->h_magic != cpu_to_le32(EXT2_XATTR_MAGIC) ||
-	    HDR(bh)->h_blocks != cpu_to_le32(1)) {
+	if (!ext2_xattr_header_valid(HDR(bh))) {
 		ext2_error(inode->i_sb, "ext2_xattr_delete_inode",
 			"inode %ld: bad block %d", inode->i_ino,
 			EXT2_I(inode)->i_file_acl);
diff --git a/fs/ext4/Kconfig b/fs/ext4/Kconfig
index a453cc87082b..cbb5ca830e57 100644
--- a/fs/ext4/Kconfig
+++ b/fs/ext4/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 # Ext3 configs are here for backward compatibility with old configs which may
 # have EXT3_FS set but not EXT4_FS set and thus would result in non-bootable
 # kernels after the removal of ext3 driver.
@@ -96,23 +97,8 @@ config EXT4_FS_SECURITY
 	  If you are not using a security module that requires using
 	  extended attributes for file security labels, say N.
 
-config EXT4_ENCRYPTION
-	bool "Ext4 Encryption"
-	depends on EXT4_FS
-	select FS_ENCRYPTION
-	help
-	  Enable encryption of ext4 files and directories.  This
-	  feature is similar to ecryptfs, but it is more memory
-	  efficient since it avoids caching the encrypted and
-	  decrypted pages in the page cache.
-
-config EXT4_FS_ENCRYPTION
-	bool
-	default y
-	depends on EXT4_ENCRYPTION
-
 config EXT4_DEBUG
-	bool "EXT4 debugging support"
+	bool "Ext4 debugging support"
 	depends on EXT4_FS
 	help
 	  Enables run-time debugging support for the ext4 filesystem.
diff --git a/fs/ext4/balloc.c b/fs/ext4/balloc.c
index e5d6ee61ff48..0b202e00d93f 100644
--- a/fs/ext4/balloc.c
+++ b/fs/ext4/balloc.c
@@ -603,9 +603,9 @@ int ext4_claim_free_clusters(struct ext4_sb_info *sbi,
 }
 
 /**
- * ext4_should_retry_alloc()
+ * ext4_should_retry_alloc() - check if a block allocation should be retried
  * @sb:			super block
- * @retries		number of attemps has been made
+ * @retries:		number of attemps has been made
  *
  * ext4_should_retry_alloc() is called when ENOSPC is returned, and if
  * it is profitable to retry the operation, this function will wait
diff --git a/fs/ext4/block_validity.c b/fs/ext4/block_validity.c
index 913061c0de1b..8e83741b02e0 100644
--- a/fs/ext4/block_validity.c
+++ b/fs/ext4/block_validity.c
@@ -137,6 +137,49 @@ static void debug_print_tree(struct ext4_sb_info *sbi)
 	printk(KERN_CONT "\n");
 }
 
+static int ext4_protect_reserved_inode(struct super_block *sb, u32 ino)
+{
+	struct inode *inode;
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct ext4_map_blocks map;
+	u32 i = 0, num;
+	int err = 0, n;
+
+	if ((ino < EXT4_ROOT_INO) ||
+	    (ino > le32_to_cpu(sbi->s_es->s_inodes_count)))
+		return -EINVAL;
+	inode = ext4_iget(sb, ino, EXT4_IGET_SPECIAL);
+	if (IS_ERR(inode))
+		return PTR_ERR(inode);
+	num = (inode->i_size + sb->s_blocksize - 1) >> sb->s_blocksize_bits;
+	while (i < num) {
+		map.m_lblk = i;
+		map.m_len = num - i;
+		n = ext4_map_blocks(NULL, inode, &map, 0);
+		if (n < 0) {
+			err = n;
+			break;
+		}
+		if (n == 0) {
+			i++;
+		} else {
+			if (!ext4_data_block_valid(sbi, map.m_pblk, n)) {
+				ext4_error(sb, "blocks %llu-%llu from inode %u "
+					   "overlap system zone", map.m_pblk,
+					   map.m_pblk + map.m_len - 1, ino);
+				err = -EFSCORRUPTED;
+				break;
+			}
+			err = add_system_zone(sbi, map.m_pblk, n);
+			if (err < 0)
+				break;
+			i += n;
+		}
+	}
+	iput(inode);
+	return err;
+}
+
 int ext4_setup_system_zone(struct super_block *sb)
 {
 	ext4_group_t ngroups = ext4_get_groups_count(sb);
@@ -155,6 +198,7 @@ int ext4_setup_system_zone(struct super_block *sb)
 		return 0;
 
 	for (i=0; i < ngroups; i++) {
+		cond_resched();
 		if (ext4_bg_has_super(sb, i) &&
 		    ((i < 5) || ((i % flex_size) == 0)))
 			add_system_zone(sbi, ext4_group_first_block_no(sb, i),
@@ -171,6 +215,12 @@ int ext4_setup_system_zone(struct super_block *sb)
 		if (ret)
 			return ret;
 	}
+	if (ext4_has_feature_journal(sb) && sbi->s_es->s_journal_inum) {
+		ret = ext4_protect_reserved_inode(sb,
+				le32_to_cpu(sbi->s_es->s_journal_inum));
+		if (ret)
+			return ret;
+	}
 
 	if (test_opt(sb, DEBUG))
 		debug_print_tree(sbi);
@@ -227,6 +277,11 @@ int ext4_check_blockref(const char *function, unsigned int line,
 	__le32 *bref = p;
 	unsigned int blk;
 
+	if (ext4_has_feature_journal(inode->i_sb) &&
+	    (inode->i_ino ==
+	     le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum)))
+		return 0;
+
 	while (bref < p+max) {
 		blk = le32_to_cpu(*bref++);
 		if (blk &&
diff --git a/fs/ext4/dir.c b/fs/ext4/dir.c
index f93f9881ec18..86054f31fe4d 100644
--- a/fs/ext4/dir.c
+++ b/fs/ext4/dir.c
@@ -26,12 +26,16 @@
 #include <linux/buffer_head.h>
 #include <linux/slab.h>
 #include <linux/iversion.h>
+#include <linux/unicode.h>
 #include "ext4.h"
 #include "xattr.h"
 
 static int ext4_dx_readdir(struct file *, struct dir_context *);
 
 /**
+ * is_dx_dir() - check if a directory is using htree indexing
+ * @inode: directory inode
+ *
  * Check if the given dir-inode refers to an htree-indexed directory
  * (or a directory which could potentially get converted to use htree
  * indexing).
@@ -108,10 +112,9 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
 	struct inode *inode = file_inode(file);
 	struct super_block *sb = inode->i_sb;
 	struct buffer_head *bh = NULL;
-	int dir_has_error = 0;
 	struct fscrypt_str fstr = FSTR_INIT(NULL, 0);
 
-	if (ext4_encrypted_inode(inode)) {
+	if (IS_ENCRYPTED(inode)) {
 		err = fscrypt_get_encryption_info(inode);
 		if (err && err != -ENOKEY)
 			return err;
@@ -138,14 +141,12 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
 			return err;
 	}
 
-	if (ext4_encrypted_inode(inode)) {
+	if (IS_ENCRYPTED(inode)) {
 		err = fscrypt_fname_alloc_buffer(inode, EXT4_NAME_LEN, &fstr);
 		if (err < 0)
 			return err;
 	}
 
-	offset = ctx->pos & (sb->s_blocksize - 1);
-
 	while (ctx->pos < inode->i_size) {
 		struct ext4_map_blocks map;
 
@@ -154,9 +155,18 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
 			goto errout;
 		}
 		cond_resched();
+		offset = ctx->pos & (sb->s_blocksize - 1);
 		map.m_lblk = ctx->pos >> EXT4_BLOCK_SIZE_BITS(sb);
 		map.m_len = 1;
 		err = ext4_map_blocks(NULL, inode, &map, 0);
+		if (err == 0) {
+			/* m_len should never be zero but let's avoid
+			 * an infinite loop if it somehow is */
+			if (map.m_len == 0)
+				map.m_len = 1;
+			ctx->pos += map.m_len * sb->s_blocksize;
+			continue;
+		}
 		if (err > 0) {
 			pgoff_t index = map.m_pblk >>
 					(PAGE_SHIFT - inode->i_blkbits);
@@ -175,13 +185,6 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
 		}
 
 		if (!bh) {
-			if (!dir_has_error) {
-				EXT4_ERROR_FILE(file, 0,
-						"directory contains a "
-						"hole at offset %llu",
-					   (unsigned long long) ctx->pos);
-				dir_has_error = 1;
-			}
 			/* corrupt size?  Maybe no more blocks to read */
 			if (ctx->pos > inode->i_blocks << 9)
 				break;
@@ -191,8 +194,7 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
 
 		/* Check the checksum */
 		if (!buffer_verified(bh) &&
-		    !ext4_dirent_csum_verify(inode,
-				(struct ext4_dir_entry *)bh->b_data)) {
+		    !ext4_dirblock_csum_verify(inode, bh)) {
 			EXT4_ERROR_FILE(file, 0, "directory fails checksum "
 					"at offset %llu",
 					(unsigned long long)ctx->pos);
@@ -245,7 +247,7 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
 			offset += ext4_rec_len_from_disk(de->rec_len,
 					sb->s_blocksize);
 			if (le32_to_cpu(de->inode)) {
-				if (!ext4_encrypted_inode(inode)) {
+				if (!IS_ENCRYPTED(inode)) {
 					if (!dir_emit(ctx, de->name,
 					    de->name_len,
 					    le32_to_cpu(de->inode),
@@ -283,9 +285,7 @@ static int ext4_readdir(struct file *file, struct dir_context *ctx)
 done:
 	err = 0;
 errout:
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
 	fscrypt_fname_free_buffer(&fstr);
-#endif
 	brelse(bh);
 	return err;
 }
@@ -613,7 +613,7 @@ finished:
 
 static int ext4_dir_open(struct inode * inode, struct file * filp)
 {
-	if (ext4_encrypted_inode(inode))
+	if (IS_ENCRYPTED(inode))
 		return fscrypt_get_encryption_info(inode) ? -EACCES : 0;
 	return 0;
 }
@@ -662,3 +662,50 @@ const struct file_operations ext4_dir_operations = {
 	.open		= ext4_dir_open,
 	.release	= ext4_release_dir,
 };
+
+#ifdef CONFIG_UNICODE
+static int ext4_d_compare(const struct dentry *dentry, unsigned int len,
+			  const char *str, const struct qstr *name)
+{
+	struct qstr qstr = {.name = str, .len = len };
+
+	if (!IS_CASEFOLDED(dentry->d_parent->d_inode)) {
+		if (len != name->len)
+			return -1;
+		return memcmp(str, name->name, len);
+	}
+
+	return ext4_ci_compare(dentry->d_parent->d_inode, name, &qstr, false);
+}
+
+static int ext4_d_hash(const struct dentry *dentry, struct qstr *str)
+{
+	const struct ext4_sb_info *sbi = EXT4_SB(dentry->d_sb);
+	const struct unicode_map *um = sbi->s_encoding;
+	unsigned char *norm;
+	int len, ret = 0;
+
+	if (!IS_CASEFOLDED(dentry->d_inode))
+		return 0;
+
+	norm = kmalloc(PATH_MAX, GFP_ATOMIC);
+	if (!norm)
+		return -ENOMEM;
+
+	len = utf8_casefold(um, str, norm, PATH_MAX);
+	if (len < 0) {
+		if (ext4_has_strict_mode(sbi))
+			ret = -EINVAL;
+		goto out;
+	}
+	str->hash = full_name_hash(dentry, norm, len);
+out:
+	kfree(norm);
+	return ret;
+}
+
+const struct dentry_operations ext4_dentry_ops = {
+	.d_hash = ext4_d_hash,
+	.d_compare = ext4_d_compare,
+};
+#endif
diff --git a/fs/ext4/ext4.h b/fs/ext4/ext4.h
index 185a05d3257e..bf660aa7a9e0 100644
--- a/fs/ext4/ext4.h
+++ b/fs/ext4/ext4.h
@@ -40,7 +40,6 @@
 #include <linux/compat.h>
 #endif
 
-#define __FS_HAS_ENCRYPTION IS_ENABLED(CONFIG_EXT4_FS_ENCRYPTION)
 #include <linux/fscrypt.h>
 
 #include <linux/compiler.h>
@@ -400,10 +399,11 @@ struct flex_groups {
 #define EXT4_EOFBLOCKS_FL		0x00400000 /* Blocks allocated beyond EOF */
 #define EXT4_INLINE_DATA_FL		0x10000000 /* Inode has inline data. */
 #define EXT4_PROJINHERIT_FL		0x20000000 /* Create with parents projid */
+#define EXT4_CASEFOLD_FL		0x40000000 /* Casefolded file */
 #define EXT4_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
 
-#define EXT4_FL_USER_VISIBLE		0x304BDFFF /* User visible flags */
-#define EXT4_FL_USER_MODIFIABLE		0x204BC0FF /* User modifiable flags */
+#define EXT4_FL_USER_VISIBLE		0x704BDFFF /* User visible flags */
+#define EXT4_FL_USER_MODIFIABLE		0x604BC0FF /* User modifiable flags */
 
 /* Flags we can manipulate with through EXT4_IOC_FSSETXATTR */
 #define EXT4_FL_XFLAG_VISIBLE		(EXT4_SYNC_FL | \
@@ -418,14 +418,18 @@ struct flex_groups {
 			   EXT4_SYNC_FL | EXT4_NODUMP_FL | EXT4_NOATIME_FL |\
 			   EXT4_NOCOMPR_FL | EXT4_JOURNAL_DATA_FL |\
 			   EXT4_NOTAIL_FL | EXT4_DIRSYNC_FL |\
-			   EXT4_PROJINHERIT_FL)
+			   EXT4_PROJINHERIT_FL | EXT4_CASEFOLD_FL)
 
 /* Flags that are appropriate for regular files (all but dir-specific ones). */
-#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL))
+#define EXT4_REG_FLMASK (~(EXT4_DIRSYNC_FL | EXT4_TOPDIR_FL | EXT4_CASEFOLD_FL |\
+			   EXT4_PROJINHERIT_FL))
 
 /* Flags that are appropriate for non-directories/regular files. */
 #define EXT4_OTHER_FLMASK (EXT4_NODUMP_FL | EXT4_NOATIME_FL)
 
+/* The only flags that should be swapped */
+#define EXT4_FL_SHOULD_SWAP (EXT4_HUGE_FILE_FL | EXT4_EXTENTS_FL)
+
 /* Mask out flags that are inappropriate for the given type of inode. */
 static inline __u32 ext4_mask_flags(umode_t mode, __u32 flags)
 {
@@ -1311,7 +1315,9 @@ struct ext4_super_block {
 	__u8	s_first_error_time_hi;
 	__u8	s_last_error_time_hi;
 	__u8	s_pad[2];
-	__le32	s_reserved[96];		/* Padding to the end of the block */
+	__le16  s_encoding;		/* Filename charset encoding */
+	__le16  s_encoding_flags;	/* Filename charset encoding flags */
+	__le32	s_reserved[95];		/* Padding to the end of the block */
 	__le32	s_checksum;		/* crc32c(superblock) */
 };
 
@@ -1326,7 +1332,7 @@ struct ext4_super_block {
 #define EXT4_MF_FS_ABORTED		0x0002	/* Fatal error detected */
 #define EXT4_MF_TEST_DUMMY_ENCRYPTION	0x0004
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 #define DUMMY_ENCRYPTION_ENABLED(sbi) (unlikely((sbi)->s_mount_flags & \
 						EXT4_MF_TEST_DUMMY_ENCRYPTION))
 #else
@@ -1336,6 +1342,16 @@ struct ext4_super_block {
 /* Number of quota types we support */
 #define EXT4_MAXQUOTAS 3
 
+#define EXT4_ENC_UTF8_12_1	1
+
+/*
+ * Flags for ext4_sb_info.s_encoding_flags.
+ */
+#define EXT4_ENC_STRICT_MODE_FL	(1 << 0)
+
+#define ext4_has_strict_mode(sbi) \
+	(sbi->s_encoding_flags & EXT4_ENC_STRICT_MODE_FL)
+
 /*
  * fourth extended-fs super-block data in memory
  */
@@ -1385,6 +1401,10 @@ struct ext4_sb_info {
 	struct kobject s_kobj;
 	struct completion s_kobj_unregister;
 	struct super_block *s_sb;
+#ifdef CONFIG_UNICODE
+	struct unicode_map *s_encoding;
+	__u16 s_encoding_flags;
+#endif
 
 	/* Journaling */
 	struct journal_s *s_journal;
@@ -1590,9 +1610,6 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
 #define EXT4_SB(sb)	(sb)
 #endif
 
-/*
- * Returns true if the inode is inode is encrypted
- */
 #define NEXT_ORPHAN(inode) EXT4_I(inode)->i_dtime
 
 /*
@@ -1661,6 +1678,9 @@ static inline void ext4_clear_state_flags(struct ext4_inode_info *ei)
 #define EXT4_FEATURE_INCOMPAT_LARGEDIR		0x4000 /* >2GB or 3-lvl htree */
 #define EXT4_FEATURE_INCOMPAT_INLINE_DATA	0x8000 /* data in inode */
 #define EXT4_FEATURE_INCOMPAT_ENCRYPT		0x10000
+#define EXT4_FEATURE_INCOMPAT_CASEFOLD		0x20000
+
+extern void ext4_update_dynamic_rev(struct super_block *sb);
 
 #define EXT4_FEATURE_COMPAT_FUNCS(name, flagname) \
 static inline bool ext4_has_feature_##name(struct super_block *sb) \
@@ -1670,6 +1690,7 @@ static inline bool ext4_has_feature_##name(struct super_block *sb) \
 } \
 static inline void ext4_set_feature_##name(struct super_block *sb) \
 { \
+	ext4_update_dynamic_rev(sb); \
 	EXT4_SB(sb)->s_es->s_feature_compat |= \
 		cpu_to_le32(EXT4_FEATURE_COMPAT_##flagname); \
 } \
@@ -1687,6 +1708,7 @@ static inline bool ext4_has_feature_##name(struct super_block *sb) \
 } \
 static inline void ext4_set_feature_##name(struct super_block *sb) \
 { \
+	ext4_update_dynamic_rev(sb); \
 	EXT4_SB(sb)->s_es->s_feature_ro_compat |= \
 		cpu_to_le32(EXT4_FEATURE_RO_COMPAT_##flagname); \
 } \
@@ -1704,6 +1726,7 @@ static inline bool ext4_has_feature_##name(struct super_block *sb) \
 } \
 static inline void ext4_set_feature_##name(struct super_block *sb) \
 { \
+	ext4_update_dynamic_rev(sb); \
 	EXT4_SB(sb)->s_es->s_feature_incompat |= \
 		cpu_to_le32(EXT4_FEATURE_INCOMPAT_##flagname); \
 } \
@@ -1749,6 +1772,7 @@ EXT4_FEATURE_INCOMPAT_FUNCS(csum_seed,		CSUM_SEED)
 EXT4_FEATURE_INCOMPAT_FUNCS(largedir,		LARGEDIR)
 EXT4_FEATURE_INCOMPAT_FUNCS(inline_data,	INLINE_DATA)
 EXT4_FEATURE_INCOMPAT_FUNCS(encrypt,		ENCRYPT)
+EXT4_FEATURE_INCOMPAT_FUNCS(casefold,		CASEFOLD)
 
 #define EXT2_FEATURE_COMPAT_SUPP	EXT4_FEATURE_COMPAT_EXT_ATTR
 #define EXT2_FEATURE_INCOMPAT_SUPP	(EXT4_FEATURE_INCOMPAT_FILETYPE| \
@@ -1776,6 +1800,7 @@ EXT4_FEATURE_INCOMPAT_FUNCS(encrypt,		ENCRYPT)
 					 EXT4_FEATURE_INCOMPAT_MMP | \
 					 EXT4_FEATURE_INCOMPAT_INLINE_DATA | \
 					 EXT4_FEATURE_INCOMPAT_ENCRYPT | \
+					 EXT4_FEATURE_INCOMPAT_CASEFOLD | \
 					 EXT4_FEATURE_INCOMPAT_CSUM_SEED | \
 					 EXT4_FEATURE_INCOMPAT_LARGEDIR)
 #define EXT4_FEATURE_RO_COMPAT_SUPP	(EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \
@@ -2017,7 +2042,6 @@ static inline u32 ext4_chksum(struct ext4_sb_info *sbi, u32 crc,
 	BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver)!=sizeof(desc.ctx));
 
 	desc.shash.tfm = sbi->s_chksum_driver;
-	desc.shash.flags = 0;
 	*(u32 *)desc.ctx = crc;
 
 	BUG_ON(crypto_shash_update(&desc.shash, address, length));
@@ -2051,9 +2075,12 @@ struct ext4_filename {
 	const struct qstr *usr_fname;
 	struct fscrypt_str disk_name;
 	struct dx_hash_info hinfo;
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	struct fscrypt_str crypto_buf;
 #endif
+#ifdef CONFIG_UNICODE
+	struct fscrypt_str cf_name;
+#endif
 };
 
 #define fname_name(p) ((p)->disk_name.name)
@@ -2279,29 +2306,62 @@ extern unsigned ext4_free_clusters_after_init(struct super_block *sb,
 					      struct ext4_group_desc *gdp);
 ext4_fsblk_t ext4_inode_to_goal_block(struct inode *);
 
-static inline bool ext4_encrypted_inode(struct inode *inode)
+#ifdef CONFIG_UNICODE
+extern void ext4_fname_setup_ci_filename(struct inode *dir,
+					 const struct qstr *iname,
+					 struct fscrypt_str *fname);
+#endif
+
+#ifdef CONFIG_FS_ENCRYPTION
+static inline void ext4_fname_from_fscrypt_name(struct ext4_filename *dst,
+						const struct fscrypt_name *src)
 {
-	return ext4_test_inode_flag(inode, EXT4_INODE_ENCRYPT);
+	memset(dst, 0, sizeof(*dst));
+
+	dst->usr_fname = src->usr_fname;
+	dst->disk_name = src->disk_name;
+	dst->hinfo.hash = src->hash;
+	dst->hinfo.minor_hash = src->minor_hash;
+	dst->crypto_buf = src->crypto_buf;
 }
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
 static inline int ext4_fname_setup_filename(struct inode *dir,
-			const struct qstr *iname,
-			int lookup, struct ext4_filename *fname)
+					    const struct qstr *iname,
+					    int lookup,
+					    struct ext4_filename *fname)
 {
 	struct fscrypt_name name;
 	int err;
 
-	memset(fname, 0, sizeof(struct ext4_filename));
-
 	err = fscrypt_setup_filename(dir, iname, lookup, &name);
+	if (err)
+		return err;
+
+	ext4_fname_from_fscrypt_name(fname, &name);
+
+#ifdef CONFIG_UNICODE
+	ext4_fname_setup_ci_filename(dir, iname, &fname->cf_name);
+#endif
+	return 0;
+}
+
+static inline int ext4_fname_prepare_lookup(struct inode *dir,
+					    struct dentry *dentry,
+					    struct ext4_filename *fname)
+{
+	struct fscrypt_name name;
+	int err;
+
+	err = fscrypt_prepare_lookup(dir, dentry, &name);
+	if (err)
+		return err;
 
-	fname->usr_fname = name.usr_fname;
-	fname->disk_name = name.disk_name;
-	fname->hinfo.hash = name.hash;
-	fname->hinfo.minor_hash = name.minor_hash;
-	fname->crypto_buf = name.crypto_buf;
-	return err;
+	ext4_fname_from_fscrypt_name(fname, &name);
+
+#ifdef CONFIG_UNICODE
+	ext4_fname_setup_ci_filename(dir, &dentry->d_name, &fname->cf_name);
+#endif
+	return 0;
 }
 
 static inline void ext4_fname_free_filename(struct ext4_filename *fname)
@@ -2314,20 +2374,44 @@ static inline void ext4_fname_free_filename(struct ext4_filename *fname)
 	fname->crypto_buf.name = NULL;
 	fname->usr_fname = NULL;
 	fname->disk_name.name = NULL;
+
+#ifdef CONFIG_UNICODE
+	kfree(fname->cf_name.name);
+	fname->cf_name.name = NULL;
+#endif
 }
-#else
+#else /* !CONFIG_FS_ENCRYPTION */
 static inline int ext4_fname_setup_filename(struct inode *dir,
-		const struct qstr *iname,
-		int lookup, struct ext4_filename *fname)
+					    const struct qstr *iname,
+					    int lookup,
+					    struct ext4_filename *fname)
 {
 	fname->usr_fname = iname;
 	fname->disk_name.name = (unsigned char *) iname->name;
 	fname->disk_name.len = iname->len;
+
+#ifdef CONFIG_UNICODE
+	ext4_fname_setup_ci_filename(dir, iname, &fname->cf_name);
+#endif
+
 	return 0;
 }
-static inline void ext4_fname_free_filename(struct ext4_filename *fname) { }
 
+static inline int ext4_fname_prepare_lookup(struct inode *dir,
+					    struct dentry *dentry,
+					    struct ext4_filename *fname)
+{
+	return ext4_fname_setup_filename(dir, &dentry->d_name, 1, fname);
+}
+
+static inline void ext4_fname_free_filename(struct ext4_filename *fname)
+{
+#ifdef CONFIG_UNICODE
+	kfree(fname->cf_name.name);
+	fname->cf_name.name = NULL;
 #endif
+}
+#endif /* !CONFIG_FS_ENCRYPTION */
 
 /* dir.c */
 extern int __ext4_check_dir_entry(const char *, unsigned int, struct inode *,
@@ -2375,8 +2459,8 @@ extern int ext4_check_all_de(struct inode *dir, struct buffer_head *bh,
 extern int ext4_sync_file(struct file *, loff_t, loff_t, int);
 
 /* hash.c */
-extern int ext4fs_dirhash(const char *name, int len, struct
-			  dx_hash_info *hinfo);
+extern int ext4fs_dirhash(const struct inode *dir, const char *name, int len,
+			  struct dx_hash_info *hinfo);
 
 /* ialloc.c */
 extern struct inode *__ext4_new_inode(handle_t *, struct inode *, umode_t,
@@ -2518,8 +2602,8 @@ extern int ext4_ext_migrate(struct inode *);
 extern int ext4_ind_migrate(struct inode *inode);
 
 /* namei.c */
-extern int ext4_dirent_csum_verify(struct inode *inode,
-				   struct ext4_dir_entry *dirent);
+extern int ext4_dirblock_csum_verify(struct inode *inode,
+				     struct buffer_head *bh);
 extern int ext4_orphan_add(handle_t *, struct inode *);
 extern int ext4_orphan_del(handle_t *, struct inode *);
 extern int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
@@ -2672,7 +2756,6 @@ do {									\
 
 #endif
 
-extern void ext4_update_dynamic_rev(struct super_block *sb);
 extern int ext4_update_compat_feature(handle_t *handle, struct super_block *sb,
 					__u32 compat);
 extern int ext4_update_rocompat_feature(handle_t *handle,
@@ -2973,6 +3056,10 @@ static inline void ext4_unlock_group(struct super_block *sb,
 /* dir.c */
 extern const struct file_operations ext4_dir_operations;
 
+#ifdef CONFIG_UNICODE
+extern const struct dentry_operations ext4_dentry_ops;
+#endif
+
 /* file.c */
 extern const struct inode_operations ext4_file_inode_operations;
 extern const struct file_operations ext4_file_operations;
@@ -3017,11 +3104,11 @@ extern int ext4_try_create_inline_dir(handle_t *handle,
 extern int ext4_read_inline_dir(struct file *filp,
 				struct dir_context *ctx,
 				int *has_inline_data);
-extern int htree_inlinedir_to_tree(struct file *dir_file,
-				   struct inode *dir, ext4_lblk_t block,
-				   struct dx_hash_info *hinfo,
-				   __u32 start_hash, __u32 start_minor_hash,
-				   int *has_inline_data);
+extern int ext4_inlinedir_to_tree(struct file *dir_file,
+				  struct inode *dir, ext4_lblk_t block,
+				  struct dx_hash_info *hinfo,
+				  __u32 start_hash, __u32 start_minor_hash,
+				  int *has_inline_data);
 extern struct buffer_head *ext4_find_inline_entry(struct inode *dir,
 					struct ext4_filename *fname,
 					struct ext4_dir_entry_2 **res_dir,
@@ -3060,11 +3147,14 @@ extern struct ext4_dir_entry_2 *ext4_init_dot_dotdot(struct inode *inode,
 				 struct ext4_dir_entry_2 *de,
 				 int blocksize, int csum_size,
 				 unsigned int parent_ino, int dotdot_real_len);
-extern void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
-				   unsigned int blocksize);
-extern int ext4_handle_dirty_dirent_node(handle_t *handle,
-					 struct inode *inode,
-					 struct buffer_head *bh);
+extern void ext4_initialize_dirent_tail(struct buffer_head *bh,
+					unsigned int blocksize);
+extern int ext4_handle_dirty_dirblock(handle_t *handle, struct inode *inode,
+				      struct buffer_head *bh);
+extern int ext4_ci_compare(const struct inode *parent,
+			   const struct qstr *fname,
+			   const struct qstr *entry, bool quick);
+
 #define S_SHIFT 12
 static const unsigned char ext4_type_by_mode[(S_IFMT >> S_SHIFT) + 1] = {
 	[S_IFREG >> S_SHIFT]	= EXT4_FT_REG_FILE,
diff --git a/fs/ext4/ext4_jbd2.h b/fs/ext4/ext4_jbd2.h
index 15b6dd733780..ef8fcf7d0d3b 100644
--- a/fs/ext4/ext4_jbd2.h
+++ b/fs/ext4/ext4_jbd2.h
@@ -361,20 +361,20 @@ static inline int ext4_journal_force_commit(journal_t *journal)
 }
 
 static inline int ext4_jbd2_inode_add_write(handle_t *handle,
-					    struct inode *inode)
+		struct inode *inode, loff_t start_byte, loff_t length)
 {
 	if (ext4_handle_valid(handle))
-		return jbd2_journal_inode_add_write(handle,
-						    EXT4_I(inode)->jinode);
+		return jbd2_journal_inode_ranged_write(handle,
+				EXT4_I(inode)->jinode, start_byte, length);
 	return 0;
 }
 
 static inline int ext4_jbd2_inode_add_wait(handle_t *handle,
-					   struct inode *inode)
+		struct inode *inode, loff_t start_byte, loff_t length)
 {
 	if (ext4_handle_valid(handle))
-		return jbd2_journal_inode_add_wait(handle,
-						   EXT4_I(inode)->jinode);
+		return jbd2_journal_inode_ranged_wait(handle,
+				EXT4_I(inode)->jinode, start_byte, length);
 	return 0;
 }
 
@@ -384,7 +384,7 @@ static inline void ext4_update_inode_fsync_trans(handle_t *handle,
 {
 	struct ext4_inode_info *ei = EXT4_I(inode);
 
-	if (ext4_handle_valid(handle)) {
+	if (ext4_handle_valid(handle) && !is_handle_aborted(handle)) {
 		ei->i_sync_tid = handle->h_transaction->t_tid;
 		if (datasync)
 			ei->i_datasync_tid = handle->h_transaction->t_tid;
@@ -411,7 +411,7 @@ static inline int ext4_inode_journal_mode(struct inode *inode)
 	    (ext4_test_inode_flag(inode, EXT4_INODE_JOURNAL_DATA) &&
 	    !test_opt(inode->i_sb, DELALLOC))) {
 		/* We do not support data journalling for encrypted data */
-		if (S_ISREG(inode->i_mode) && ext4_encrypted_inode(inode))
+		if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode))
 			return EXT4_INODE_ORDERED_DATA_MODE;  /* ordered */
 		return EXT4_INODE_JOURNAL_DATA_MODE;	/* journal data */
 	}
diff --git a/fs/ext4/extents.c b/fs/ext4/extents.c
index 240b6dea5441..92266a2da7d6 100644
--- a/fs/ext4/extents.c
+++ b/fs/ext4/extents.c
@@ -518,10 +518,14 @@ __read_extent_tree_block(const char *function, unsigned int line,
 	}
 	if (buffer_verified(bh) && !(flags & EXT4_EX_FORCE_CACHE))
 		return bh;
-	err = __ext4_ext_check(function, line, inode,
-			       ext_block_hdr(bh), depth, pblk);
-	if (err)
-		goto errout;
+	if (!ext4_has_feature_journal(inode->i_sb) ||
+	    (inode->i_ino !=
+	     le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum))) {
+		err = __ext4_ext_check(function, line, inode,
+				       ext_block_hdr(bh), depth, pblk);
+		if (err)
+			goto errout;
+	}
 	set_buffer_verified(bh);
 	/*
 	 * If this is a leaf block, cache all of its entries
@@ -1035,6 +1039,7 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
 	__le32 border;
 	ext4_fsblk_t *ablocks = NULL; /* array of allocated blocks */
 	int err = 0;
+	size_t ext_size = 0;
 
 	/* make decision: where to split? */
 	/* FIXME: now decision is simplest: at current extent */
@@ -1126,6 +1131,10 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
 		le16_add_cpu(&neh->eh_entries, m);
 	}
 
+	/* zero out unused area in the extent block */
+	ext_size = sizeof(struct ext4_extent_header) +
+		sizeof(struct ext4_extent) * le16_to_cpu(neh->eh_entries);
+	memset(bh->b_data + ext_size, 0, inode->i_sb->s_blocksize - ext_size);
 	ext4_extent_block_csum_set(inode, neh);
 	set_buffer_uptodate(bh);
 	unlock_buffer(bh);
@@ -1205,6 +1214,11 @@ static int ext4_ext_split(handle_t *handle, struct inode *inode,
 				sizeof(struct ext4_extent_idx) * m);
 			le16_add_cpu(&neh->eh_entries, m);
 		}
+		/* zero out unused area in the extent block */
+		ext_size = sizeof(struct ext4_extent_header) +
+		   (sizeof(struct ext4_extent) * le16_to_cpu(neh->eh_entries));
+		memset(bh->b_data + ext_size, 0,
+			inode->i_sb->s_blocksize - ext_size);
 		ext4_extent_block_csum_set(inode, neh);
 		set_buffer_uptodate(bh);
 		unlock_buffer(bh);
@@ -1270,6 +1284,7 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
 	ext4_fsblk_t newblock, goal = 0;
 	struct ext4_super_block *es = EXT4_SB(inode->i_sb)->s_es;
 	int err = 0;
+	size_t ext_size = 0;
 
 	/* Try to prepend new index to old one */
 	if (ext_depth(inode))
@@ -1295,9 +1310,11 @@ static int ext4_ext_grow_indepth(handle_t *handle, struct inode *inode,
 		goto out;
 	}
 
+	ext_size = sizeof(EXT4_I(inode)->i_data);
 	/* move top-level index/leaf into new block */
-	memmove(bh->b_data, EXT4_I(inode)->i_data,
-		sizeof(EXT4_I(inode)->i_data));
+	memmove(bh->b_data, EXT4_I(inode)->i_data, ext_size);
+	/* zero out unused area in the extent block */
+	memset(bh->b_data + ext_size, 0, inode->i_sb->s_blocksize - ext_size);
 
 	/* set size of new block */
 	neh = ext_block_hdr(bh);
@@ -2956,14 +2973,17 @@ again:
 			if (err < 0)
 				goto out;
 
-		} else if (sbi->s_cluster_ratio > 1 && end >= ex_end) {
+		} else if (sbi->s_cluster_ratio > 1 && end >= ex_end &&
+			   partial.state == initial) {
 			/*
-			 * If there's an extent to the right its first cluster
-			 * contains the immediate right boundary of the
-			 * truncated/punched region.  Set partial_cluster to
-			 * its negative value so it won't be freed if shared
-			 * with the current extent.  The end < ee_block case
-			 * is handled in ext4_ext_rm_leaf().
+			 * If we're punching, there's an extent to the right.
+			 * If the partial cluster hasn't been set, set it to
+			 * that extent's first cluster and its state to nofree
+			 * so it won't be freed should it contain blocks to be
+			 * removed. If it's already set (tofree/nofree), we're
+			 * retrying and keep the original partial cluster info
+			 * so a cluster marked tofree as a result of earlier
+			 * extent removal is not lost.
 			 */
 			lblk = ex_end + 1;
 			err = ext4_ext_search_right(inode, path, &lblk, &pblk,
@@ -3631,7 +3651,7 @@ static int ext4_ext_convert_to_initialized(handle_t *handle,
 		max_zeroout = sbi->s_extent_max_zeroout_kb >>
 			(inode->i_sb->s_blocksize_bits - 10);
 
-	if (ext4_encrypted_inode(inode))
+	if (IS_ENCRYPTED(inode))
 		max_zeroout = 0;
 
 	/*
@@ -4048,18 +4068,8 @@ out:
 	} else
 		allocated = ret;
 	map->m_flags |= EXT4_MAP_NEW;
-	/*
-	 * if we allocated more blocks than requested
-	 * we need to make sure we unmap the extra block
-	 * allocated. The actual needed block will get
-	 * unmapped later when we find the buffer_head marked
-	 * new.
-	 */
-	if (allocated > map->m_len) {
-		clean_bdev_aliases(inode->i_sb->s_bdev, newblock + map->m_len,
-				   allocated - map->m_len);
+	if (allocated > map->m_len)
 		allocated = map->m_len;
-	}
 	map->m_len = allocated;
 
 map_out:
@@ -4818,7 +4828,7 @@ long ext4_fallocate(struct file *file, int mode, loff_t offset, loff_t len)
 	 * leave it disabled for encrypted inodes for now.  This is a
 	 * bug we should fix....
 	 */
-	if (ext4_encrypted_inode(inode) &&
+	if (IS_ENCRYPTED(inode) &&
 	    (mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE |
 		     FALLOC_FL_ZERO_RANGE)))
 		return -EOPNOTSUPP;
@@ -5666,8 +5676,8 @@ out_mutex:
 }
 
 /**
- * ext4_swap_extents - Swap extents between two inodes
- *
+ * ext4_swap_extents() - Swap extents between two inodes
+ * @handle: handle for this transaction
  * @inode1:	First inode
  * @inode2:	Second inode
  * @lblk1:	Start block for first inode
diff --git a/fs/ext4/extents_status.c b/fs/ext4/extents_status.c
index 2b439afafe13..7521de2dcf3a 100644
--- a/fs/ext4/extents_status.c
+++ b/fs/ext4/extents_status.c
@@ -711,7 +711,7 @@ static void ext4_es_insert_extent_ind_check(struct inode *inode,
 			 * We don't need to check unwritten extent because
 			 * indirect-based file doesn't have it.
 			 */
-			BUG_ON(1);
+			BUG();
 		}
 	} else if (retval == 0) {
 		if (ext4_es_is_written(es)) {
@@ -780,7 +780,7 @@ static int __es_insert_extent(struct inode *inode, struct extent_status *newes)
 			}
 			p = &(*p)->rb_right;
 		} else {
-			BUG_ON(1);
+			BUG();
 			return -EINVAL;
 		}
 	}
@@ -1317,7 +1317,6 @@ static int es_do_reclaim_extents(struct ext4_inode_info *ei, ext4_lblk_t end,
 	es = __es_tree_search(&tree->root, ei->i_es_shrink_lblk);
 	if (!es)
 		goto out_wrap;
-	node = &es->rb_node;
 	while (*nr_to_scan > 0) {
 		if (es->es_lblk > end) {
 			ei->i_es_shrink_lblk = end + 1;
diff --git a/fs/ext4/file.c b/fs/ext4/file.c
index 69d65d49837b..f4a24a46245e 100644
--- a/fs/ext4/file.c
+++ b/fs/ext4/file.c
@@ -125,7 +125,7 @@ ext4_unaligned_aio(struct inode *inode, struct iov_iter *from, loff_t pos)
 	struct super_block *sb = inode->i_sb;
 	int blockmask = sb->s_blocksize - 1;
 
-	if (pos >= i_size_read(inode))
+	if (pos >= ALIGN(i_size_read(inode), sb->s_blocksize))
 		return 0;
 
 	if ((pos | iov_iter_alignment(from)) & blockmask)
@@ -165,6 +165,10 @@ static ssize_t ext4_write_checks(struct kiocb *iocb, struct iov_iter *from)
 	ret = generic_write_checks(iocb, from);
 	if (ret <= 0)
 		return ret;
+
+	if (unlikely(IS_IMMUTABLE(inode)))
+		return -EPERM;
+
 	/*
 	 * If we have encountered a bitmap-format file, the size limit
 	 * is smaller than s_maxbytes, which is for extent-mapped files.
@@ -264,6 +268,13 @@ ext4_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	}
 
 	ret = __generic_file_write_iter(iocb, from);
+	/*
+	 * Unaligned direct AIO must be the only IO in flight. Otherwise
+	 * overlapping aligned IO after unaligned might result in data
+	 * corruption.
+	 */
+	if (ret == -EIOCBQUEUED && unaligned_aio)
+		ext4_unwritten_wait(inode);
 	inode_unlock(inode);
 
 	if (ret > 0)
diff --git a/fs/ext4/fsmap.c b/fs/ext4/fsmap.c
index 4b99e2db95b8..dbccf46f1770 100644
--- a/fs/ext4/fsmap.c
+++ b/fs/ext4/fsmap.c
@@ -626,7 +626,7 @@ int ext4_getfsmap(struct super_block *sb, struct ext4_fsmap_head *head,
 {
 	struct ext4_fsmap dkeys[2];	/* per-dev keys */
 	struct ext4_getfsmap_dev handlers[EXT4_GETFSMAP_DEVS];
-	struct ext4_getfsmap_info info = {0};
+	struct ext4_getfsmap_info info = { NULL };
 	int i;
 	int error = 0;
 
diff --git a/fs/ext4/hash.c b/fs/ext4/hash.c
index e22dcfab308b..d358bfcb6b3f 100644
--- a/fs/ext4/hash.c
+++ b/fs/ext4/hash.c
@@ -6,6 +6,7 @@
  */
 
 #include <linux/fs.h>
+#include <linux/unicode.h>
 #include <linux/compiler.h>
 #include <linux/bitops.h>
 #include "ext4.h"
@@ -196,7 +197,8 @@ static void str2hashbuf_unsigned(const char *msg, int len, __u32 *buf, int num)
  * represented, and whether or not the returned hash is 32 bits or 64
  * bits.  32 bit hashes will return 0 for the minor hash.
  */
-int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
+static int __ext4fs_dirhash(const char *name, int len,
+			    struct dx_hash_info *hinfo)
 {
 	__u32	hash;
 	__u32	minor_hash = 0;
@@ -231,6 +233,7 @@ int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
 		break;
 	case DX_HASH_HALF_MD4_UNSIGNED:
 		str2hashbuf = str2hashbuf_unsigned;
+		/* fall through */
 	case DX_HASH_HALF_MD4:
 		p = name;
 		while (len > 0) {
@@ -244,6 +247,7 @@ int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
 		break;
 	case DX_HASH_TEA_UNSIGNED:
 		str2hashbuf = str2hashbuf_unsigned;
+		/* fall through */
 	case DX_HASH_TEA:
 		p = name;
 		while (len > 0) {
@@ -266,3 +270,33 @@ int ext4fs_dirhash(const char *name, int len, struct dx_hash_info *hinfo)
 	hinfo->minor_hash = minor_hash;
 	return 0;
 }
+
+int ext4fs_dirhash(const struct inode *dir, const char *name, int len,
+		   struct dx_hash_info *hinfo)
+{
+#ifdef CONFIG_UNICODE
+	const struct unicode_map *um = EXT4_SB(dir->i_sb)->s_encoding;
+	int r, dlen;
+	unsigned char *buff;
+	struct qstr qstr = {.name = name, .len = len };
+
+	if (len && IS_CASEFOLDED(dir)) {
+		buff = kzalloc(sizeof(char) * PATH_MAX, GFP_KERNEL);
+		if (!buff)
+			return -ENOMEM;
+
+		dlen = utf8_casefold(um, &qstr, buff, PATH_MAX);
+		if (dlen < 0) {
+			kfree(buff);
+			goto opaque_seq;
+		}
+
+		r = __ext4fs_dirhash(buff, dlen, hinfo);
+
+		kfree(buff);
+		return r;
+	}
+opaque_seq:
+#endif
+	return __ext4fs_dirhash(name, len, hinfo);
+}
diff --git a/fs/ext4/ialloc.c b/fs/ext4/ialloc.c
index 7ff14a1adba3..764ff4c56233 100644
--- a/fs/ext4/ialloc.c
+++ b/fs/ext4/ialloc.c
@@ -455,7 +455,7 @@ static int find_group_orlov(struct super_block *sb, struct inode *parent,
 		if (qstr) {
 			hinfo.hash_version = DX_HASH_HALF_MD4;
 			hinfo.seed = sbi->s_hash_seed;
-			ext4fs_dirhash(qstr->name, qstr->len, &hinfo);
+			ext4fs_dirhash(parent, qstr->name, qstr->len, &hinfo);
 			grp = hinfo.hash;
 		} else
 			grp = prandom_u32();
@@ -771,7 +771,7 @@ struct inode *__ext4_new_inode(handle_t *handle, struct inode *dir,
 	if (unlikely(ext4_forced_shutdown(sbi)))
 		return ERR_PTR(-EIO);
 
-	if ((ext4_encrypted_inode(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) &&
+	if ((IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) &&
 	    (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode)) &&
 	    !(i_flags & EXT4_EA_INODE_FL)) {
 		err = fscrypt_get_encryption_info(dir);
diff --git a/fs/ext4/indirect.c b/fs/ext4/indirect.c
index bf7fa1507e81..36699a131168 100644
--- a/fs/ext4/indirect.c
+++ b/fs/ext4/indirect.c
@@ -294,14 +294,12 @@ static int ext4_blks_to_allocate(Indirect *branch, int k, unsigned int blks,
 }
 
 /**
- *	ext4_alloc_branch - allocate and set up a chain of blocks.
- *	@handle: handle for this transaction
- *	@inode: owner
- *	@indirect_blks: number of allocated indirect blocks
- *	@blks: number of allocated direct blocks
- *	@goal: preferred place for allocation
- *	@offsets: offsets (in the blocks) to store the pointers to next.
- *	@branch: place to store the chain in.
+ * ext4_alloc_branch() - allocate and set up a chain of blocks
+ * @handle: handle for this transaction
+ * @ar: structure describing the allocation request
+ * @indirect_blks: number of allocated indirect blocks
+ * @offsets: offsets (in the blocks) to store the pointers to next.
+ * @branch: place to store the chain in.
  *
  *	This function allocates blocks, zeroes out all but the last one,
  *	links them into chain and (if we are synchronous) writes them to disk.
@@ -396,15 +394,11 @@ failed:
 }
 
 /**
- * ext4_splice_branch - splice the allocated branch onto inode.
+ * ext4_splice_branch() - splice the allocated branch onto inode.
  * @handle: handle for this transaction
- * @inode: owner
- * @block: (logical) number of block we are adding
- * @chain: chain of indirect blocks (with a missing link - see
- *	ext4_alloc_branch)
+ * @ar: structure describing the allocation request
  * @where: location of missing link
  * @num:   number of indirect blocks we are adding
- * @blks:  number of direct blocks we are adding
  *
  * This function fills the missing link and does all housekeeping needed in
  * inode (->i_blocks, etc.). In case of success we end up with the full
@@ -1183,18 +1177,21 @@ do_indirects:
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
 			i_data[EXT4_IND_BLOCK] = 0;
 		}
+		/* fall through */
 	case EXT4_IND_BLOCK:
 		nr = i_data[EXT4_DIND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
 			i_data[EXT4_DIND_BLOCK] = 0;
 		}
+		/* fall through */
 	case EXT4_DIND_BLOCK:
 		nr = i_data[EXT4_TIND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
 			i_data[EXT4_TIND_BLOCK] = 0;
 		}
+		/* fall through */
 	case EXT4_TIND_BLOCK:
 		;
 	}
@@ -1219,6 +1216,7 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 	ext4_lblk_t offsets[4], offsets2[4];
 	Indirect chain[4], chain2[4];
 	Indirect *partial, *partial2;
+	Indirect *p = NULL, *p2 = NULL;
 	ext4_lblk_t max_block;
 	__le32 nr = 0, nr2 = 0;
 	int n = 0, n2 = 0;
@@ -1260,7 +1258,7 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 		}
 
 
-		partial = ext4_find_shared(inode, n, offsets, chain, &nr);
+		partial = p = ext4_find_shared(inode, n, offsets, chain, &nr);
 		if (nr) {
 			if (partial == chain) {
 				/* Shared branch grows from the inode */
@@ -1285,13 +1283,11 @@ int ext4_ind_remove_space(handle_t *handle, struct inode *inode,
 				partial->p + 1,
 				(__le32 *)partial->bh->b_data+addr_per_block,
 				(chain+n-1) - partial);
-			BUFFER_TRACE(partial->bh, "call brelse");
-			brelse(partial->bh);
 			partial--;
 		}
 
 end_range:
-		partial2 = ext4_find_shared(inode, n2, offsets2, chain2, &nr2);
+		partial2 = p2 = ext4_find_shared(inode, n2, offsets2, chain2, &nr2);
 		if (nr2) {
 			if (partial2 == chain2) {
 				/*
@@ -1321,16 +1317,14 @@ end_range:
 					   (__le32 *)partial2->bh->b_data,
 					   partial2->p,
 					   (chain2+n2-1) - partial2);
-			BUFFER_TRACE(partial2->bh, "call brelse");
-			brelse(partial2->bh);
 			partial2--;
 		}
 		goto do_indirects;
 	}
 
 	/* Punch happened within the same level (n == n2) */
-	partial = ext4_find_shared(inode, n, offsets, chain, &nr);
-	partial2 = ext4_find_shared(inode, n2, offsets2, chain2, &nr2);
+	partial = p = ext4_find_shared(inode, n, offsets, chain, &nr);
+	partial2 = p2 = ext4_find_shared(inode, n2, offsets2, chain2, &nr2);
 
 	/* Free top, but only if partial2 isn't its subtree. */
 	if (nr) {
@@ -1387,11 +1381,7 @@ end_range:
 					   partial->p + 1,
 					   partial2->p,
 					   (chain+n-1) - partial);
-			BUFFER_TRACE(partial->bh, "call brelse");
-			brelse(partial->bh);
-			BUFFER_TRACE(partial2->bh, "call brelse");
-			brelse(partial2->bh);
-			return 0;
+			goto cleanup;
 		}
 
 		/*
@@ -1406,8 +1396,6 @@ end_range:
 					   partial->p + 1,
 					   (__le32 *)partial->bh->b_data+addr_per_block,
 					   (chain+n-1) - partial);
-			BUFFER_TRACE(partial->bh, "call brelse");
-			brelse(partial->bh);
 			partial--;
 		}
 		if (partial2 > chain2 && depth2 <= depth) {
@@ -1415,11 +1403,21 @@ end_range:
 					   (__le32 *)partial2->bh->b_data,
 					   partial2->p,
 					   (chain2+n2-1) - partial2);
-			BUFFER_TRACE(partial2->bh, "call brelse");
-			brelse(partial2->bh);
 			partial2--;
 		}
 	}
+
+cleanup:
+	while (p && p > chain) {
+		BUFFER_TRACE(p->bh, "call brelse");
+		brelse(p->bh);
+		p--;
+	}
+	while (p2 && p2 > chain2) {
+		BUFFER_TRACE(p2->bh, "call brelse");
+		brelse(p2->bh);
+		p2--;
+	}
 	return 0;
 
 do_indirects:
@@ -1427,30 +1425,33 @@ do_indirects:
 	switch (offsets[0]) {
 	default:
 		if (++n >= n2)
-			return 0;
+			break;
 		nr = i_data[EXT4_IND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 1);
 			i_data[EXT4_IND_BLOCK] = 0;
 		}
+		/* fall through */
 	case EXT4_IND_BLOCK:
 		if (++n >= n2)
-			return 0;
+			break;
 		nr = i_data[EXT4_DIND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 2);
 			i_data[EXT4_DIND_BLOCK] = 0;
 		}
+		/* fall through */
 	case EXT4_DIND_BLOCK:
 		if (++n >= n2)
-			return 0;
+			break;
 		nr = i_data[EXT4_TIND_BLOCK];
 		if (nr) {
 			ext4_free_branches(handle, inode, NULL, &nr, &nr+1, 3);
 			i_data[EXT4_TIND_BLOCK] = 0;
 		}
+		/* fall through */
 	case EXT4_TIND_BLOCK:
 		;
 	}
-	return 0;
+	goto cleanup;
 }
diff --git a/fs/ext4/inline.c b/fs/ext4/inline.c
index 56f6e1782d5f..88cdf3c90bd1 100644
--- a/fs/ext4/inline.c
+++ b/fs/ext4/inline.c
@@ -1132,7 +1132,6 @@ static int ext4_finish_convert_inline_dir(handle_t *handle,
 {
 	int err, csum_size = 0, header_size = 0;
 	struct ext4_dir_entry_2 *de;
-	struct ext4_dir_entry_tail *t;
 	void *target = dir_block->b_data;
 
 	/*
@@ -1158,13 +1157,11 @@ static int ext4_finish_convert_inline_dir(handle_t *handle,
 			inline_size - EXT4_INLINE_DOTDOT_SIZE + header_size,
 			inode->i_sb->s_blocksize - csum_size);
 
-	if (csum_size) {
-		t = EXT4_DIRENT_TAIL(dir_block->b_data,
-				     inode->i_sb->s_blocksize);
-		initialize_dirent_tail(t, inode->i_sb->s_blocksize);
-	}
+	if (csum_size)
+		ext4_initialize_dirent_tail(dir_block,
+					    inode->i_sb->s_blocksize);
 	set_buffer_uptodate(dir_block);
-	err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
+	err = ext4_handle_dirty_dirblock(handle, inode, dir_block);
 	if (err)
 		return err;
 	set_buffer_verified(dir_block);
@@ -1327,11 +1324,11 @@ out:
  * inlined dir.  It returns the number directory entries loaded
  * into the tree.  If there is an error it is returned in err.
  */
-int htree_inlinedir_to_tree(struct file *dir_file,
-			    struct inode *dir, ext4_lblk_t block,
-			    struct dx_hash_info *hinfo,
-			    __u32 start_hash, __u32 start_minor_hash,
-			    int *has_inline_data)
+int ext4_inlinedir_to_tree(struct file *dir_file,
+			   struct inode *dir, ext4_lblk_t block,
+			   struct dx_hash_info *hinfo,
+			   __u32 start_hash, __u32 start_minor_hash,
+			   int *has_inline_data)
 {
 	int err = 0, count = 0;
 	unsigned int parent_ino;
@@ -1407,7 +1404,7 @@ int htree_inlinedir_to_tree(struct file *dir_file,
 			}
 		}
 
-		ext4fs_dirhash(de->name, de->name_len, hinfo);
+		ext4fs_dirhash(dir, de->name, de->name_len, hinfo);
 		if ((hinfo->hash < start_hash) ||
 		    ((hinfo->hash == start_hash) &&
 		     (hinfo->minor_hash < start_minor_hash)))
diff --git a/fs/ext4/inode.c b/fs/ext4/inode.c
index 34d7e0703cc6..420fe3deed39 100644
--- a/fs/ext4/inode.c
+++ b/fs/ext4/inode.c
@@ -391,7 +391,7 @@ void ext4_da_update_reserve_space(struct inode *inode,
 	 * inode's preallocations.
 	 */
 	if ((ei->i_reserved_data_blocks == 0) &&
-	    (atomic_read(&inode->i_writecount) == 0))
+	    !inode_is_open_for_write(inode))
 		ext4_discard_preallocations(inode);
 }
 
@@ -399,6 +399,10 @@ static int __check_block_validity(struct inode *inode, const char *func,
 				unsigned int line,
 				struct ext4_map_blocks *map)
 {
+	if (ext4_has_feature_journal(inode->i_sb) &&
+	    (inode->i_ino ==
+	     le32_to_cpu(EXT4_SB(inode->i_sb)->s_es->s_journal_inum)))
+		return 0;
 	if (!ext4_data_block_valid(EXT4_SB(inode->i_sb), map->m_pblk,
 				   map->m_len)) {
 		ext4_error_inode(inode, func, line, map->m_pblk,
@@ -415,7 +419,7 @@ int ext4_issue_zeroout(struct inode *inode, ext4_lblk_t lblk, ext4_fsblk_t pblk,
 {
 	int ret;
 
-	if (ext4_encrypted_inode(inode))
+	if (IS_ENCRYPTED(inode))
 		return fscrypt_zeroout_range(inode, lblk, pblk, len);
 
 	ret = sb_issue_zeroout(inode->i_sb, pblk, len, GFP_NOFS);
@@ -541,7 +545,7 @@ int ext4_map_blocks(handle_t *handle, struct inode *inode,
 			map->m_len = retval;
 			retval = 0;
 		} else {
-			BUG_ON(1);
+			BUG();
 		}
 #ifdef ES_AGGRESSIVE_TEST
 		ext4_map_blocks_es_recheck(handle, inode, map,
@@ -678,8 +682,6 @@ found:
 		if (flags & EXT4_GET_BLOCKS_ZERO &&
 		    map->m_flags & EXT4_MAP_MAPPED &&
 		    map->m_flags & EXT4_MAP_NEW) {
-			clean_bdev_aliases(inode->i_sb->s_bdev, map->m_pblk,
-					   map->m_len);
 			ret = ext4_issue_zeroout(inode, map->m_lblk,
 						 map->m_pblk, map->m_len);
 			if (ret) {
@@ -729,10 +731,16 @@ out_sem:
 		    !(flags & EXT4_GET_BLOCKS_ZERO) &&
 		    !ext4_is_quota_file(inode) &&
 		    ext4_should_order_data(inode)) {
+			loff_t start_byte =
+				(loff_t)map->m_lblk << inode->i_blkbits;
+			loff_t length = (loff_t)map->m_len << inode->i_blkbits;
+
 			if (flags & EXT4_GET_BLOCKS_IO_SUBMIT)
-				ret = ext4_jbd2_inode_add_wait(handle, inode);
+				ret = ext4_jbd2_inode_add_wait(handle, inode,
+						start_byte, length);
 			else
-				ret = ext4_jbd2_inode_add_write(handle, inode);
+				ret = ext4_jbd2_inode_add_write(handle, inode,
+						start_byte, length);
 			if (ret)
 				return ret;
 		}
@@ -1150,7 +1158,7 @@ int do_journal_get_write_access(handle_t *handle,
 	return ret;
 }
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
 				  get_block_t *get_block)
 {
@@ -1162,8 +1170,9 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
 	int err = 0;
 	unsigned blocksize = inode->i_sb->s_blocksize;
 	unsigned bbits;
-	struct buffer_head *bh, *head, *wait[2], **wait_bh = wait;
-	bool decrypt = false;
+	struct buffer_head *bh, *head, *wait[2];
+	int nr_wait = 0;
+	int i;
 
 	BUG_ON(!PageLocked(page));
 	BUG_ON(from > PAGE_SIZE);
@@ -1194,7 +1203,6 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
 			if (err)
 				break;
 			if (buffer_new(bh)) {
-				clean_bdev_bh_alias(bh);
 				if (PageUptodate(page)) {
 					clear_buffer_new(bh);
 					set_buffer_uptodate(bh);
@@ -1216,24 +1224,32 @@ static int ext4_block_write_begin(struct page *page, loff_t pos, unsigned len,
 		    !buffer_unwritten(bh) &&
 		    (block_start < from || block_end > to)) {
 			ll_rw_block(REQ_OP_READ, 0, 1, &bh);
-			*wait_bh++ = bh;
-			decrypt = ext4_encrypted_inode(inode) &&
-				S_ISREG(inode->i_mode);
+			wait[nr_wait++] = bh;
 		}
 	}
 	/*
 	 * If we issued read requests, let them complete.
 	 */
-	while (wait_bh > wait) {
-		wait_on_buffer(*--wait_bh);
-		if (!buffer_uptodate(*wait_bh))
+	for (i = 0; i < nr_wait; i++) {
+		wait_on_buffer(wait[i]);
+		if (!buffer_uptodate(wait[i]))
 			err = -EIO;
 	}
-	if (unlikely(err))
+	if (unlikely(err)) {
 		page_zero_new_buffers(page, from, to);
-	else if (decrypt)
-		err = fscrypt_decrypt_page(page->mapping->host, page,
-				PAGE_SIZE, 0, page->index);
+	} else if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode)) {
+		for (i = 0; i < nr_wait; i++) {
+			int err2;
+
+			err2 = fscrypt_decrypt_pagecache_blocks(page, blocksize,
+								bh_offset(wait[i]));
+			if (err2) {
+				clear_buffer_uptodate(wait[i]);
+				err = err2;
+			}
+		}
+	}
+
 	return err;
 }
 #endif
@@ -1303,7 +1319,7 @@ retry_journal:
 	/* In case writeback began while the page was unlocked */
 	wait_for_stable_page(page);
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	if (ext4_should_dioread_nolock(inode))
 		ret = ext4_block_write_begin(page, pos, len,
 					     ext4_get_block_unwritten);
@@ -1880,7 +1896,7 @@ static int ext4_da_map_blocks(struct inode *inode, sector_t iblock,
 		else if (ext4_es_is_unwritten(&es))
 			map->m_flags |= EXT4_MAP_UNWRITTEN;
 		else
-			BUG_ON(1);
+			BUG();
 
 #ifdef ES_AGGRESSIVE_TEST
 		ext4_map_blocks_es_recheck(NULL, inode, map, &orig_map, 0);
@@ -2490,10 +2506,6 @@ static int mpage_map_one_extent(handle_t *handle, struct mpage_da_data *mpd)
 	}
 
 	BUG_ON(map->m_len == 0);
-	if (map->m_flags & EXT4_MAP_NEW) {
-		clean_bdev_aliases(inode->i_sb->s_bdev, map->m_pblk,
-				   map->m_len);
-	}
 	return 0;
 }
 
@@ -2836,12 +2848,12 @@ retry:
 		goto unplug;
 	}
 	ret = mpage_prepare_extent_to_map(&mpd);
+	/* Unlock pages we didn't use */
+	mpage_release_unused_pages(&mpd, false);
 	/* Submit prepared bio */
 	ext4_io_submit(&mpd.io_submit);
 	ext4_put_io_end_defer(mpd.io_submit.io_end);
 	mpd.io_submit.io_end = NULL;
-	/* Unlock pages we didn't use */
-	mpage_release_unused_pages(&mpd, false);
 	if (ret < 0)
 		goto unplug;
 
@@ -2909,10 +2921,11 @@ retry:
 			handle = NULL;
 			mpd.do_map = 0;
 		}
-		/* Submit prepared bio */
-		ext4_io_submit(&mpd.io_submit);
 		/* Unlock pages we didn't use */
 		mpage_release_unused_pages(&mpd, give_up_on_write);
+		/* Submit prepared bio */
+		ext4_io_submit(&mpd.io_submit);
+
 		/*
 		 * Drop our io_end reference we got from init. We have
 		 * to be careful and use deferred io_end finishing if
@@ -3105,7 +3118,7 @@ retry_journal:
 	/* In case writeback began while the page was unlocked */
 	wait_for_stable_page(page);
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	ret = ext4_block_write_begin(page, pos, len,
 				     ext4_da_get_block_prep);
 #else
@@ -3880,8 +3893,8 @@ static ssize_t ext4_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 	loff_t offset = iocb->ki_pos;
 	ssize_t ret;
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
-	if (ext4_encrypted_inode(inode) && S_ISREG(inode->i_mode))
+#ifdef CONFIG_FS_ENCRYPTION
+	if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode))
 		return 0;
 #endif
 
@@ -4065,13 +4078,11 @@ static int __ext4_block_zero_page_range(handle_t *handle,
 		/* Uhhuh. Read error. Complain and punt. */
 		if (!buffer_uptodate(bh))
 			goto unlock;
-		if (S_ISREG(inode->i_mode) &&
-		    ext4_encrypted_inode(inode)) {
+		if (S_ISREG(inode->i_mode) && IS_ENCRYPTED(inode)) {
 			/* We expect the key to be set. */
 			BUG_ON(!fscrypt_has_encryption_key(inode));
-			BUG_ON(blocksize != PAGE_SIZE);
-			WARN_ON_ONCE(fscrypt_decrypt_page(page->mapping->host,
-						page, PAGE_SIZE, 0, page->index));
+			WARN_ON_ONCE(fscrypt_decrypt_pagecache_blocks(
+					page, blocksize, bh_offset(bh)));
 		}
 	}
 	if (ext4_should_journal_data(inode)) {
@@ -4089,7 +4100,8 @@ static int __ext4_block_zero_page_range(handle_t *handle,
 		err = 0;
 		mark_buffer_dirty(bh);
 		if (ext4_should_order_data(inode))
-			err = ext4_jbd2_inode_add_write(handle, inode);
+			err = ext4_jbd2_inode_add_write(handle, inode, from,
+					length);
 	}
 
 unlock:
@@ -4142,7 +4154,7 @@ static int ext4_block_truncate_page(handle_t *handle,
 	struct inode *inode = mapping->host;
 
 	/* If we are processing an encrypted inode during orphan list handling */
-	if (ext4_encrypted_inode(inode) && !fscrypt_has_encryption_key(inode))
+	if (IS_ENCRYPTED(inode) && !fscrypt_has_encryption_key(inode))
 		return 0;
 
 	blocksize = inode->i_sb->s_blocksize;
@@ -4574,6 +4586,7 @@ static int __ext4_get_inode_loc(struct inode *inode,
 	struct buffer_head	*bh;
 	struct super_block	*sb = inode->i_sb;
 	ext4_fsblk_t		block;
+	struct blk_plug		plug;
 	int			inodes_per_block, inode_offset;
 
 	iloc->bh = NULL;
@@ -4662,6 +4675,7 @@ make_io:
 		 * If we need to do any I/O, try to pre-readahead extra
 		 * blocks from the inode table.
 		 */
+		blk_start_plug(&plug);
 		if (EXT4_SB(sb)->s_inode_readahead_blks) {
 			ext4_fsblk_t b, end, table;
 			unsigned num;
@@ -4692,6 +4706,7 @@ make_io:
 		get_bh(bh);
 		bh->b_end_io = end_buffer_read_sync;
 		submit_bh(REQ_OP_READ, REQ_META | REQ_PRIO, bh);
+		blk_finish_plug(&plug);
 		wait_on_buffer(bh);
 		if (!buffer_uptodate(bh)) {
 			EXT4_ERROR_INODE_BLOCK(inode, block,
@@ -4722,7 +4737,7 @@ static bool ext4_should_use_dax(struct inode *inode)
 		return false;
 	if (ext4_has_inline_data(inode))
 		return false;
-	if (ext4_encrypted_inode(inode))
+	if (ext4_test_inode_flag(inode, EXT4_INODE_ENCRYPT))
 		return false;
 	return true;
 }
@@ -4746,9 +4761,11 @@ void ext4_set_inode_flags(struct inode *inode)
 		new_fl |= S_DAX;
 	if (flags & EXT4_ENCRYPT_FL)
 		new_fl |= S_ENCRYPTED;
+	if (flags & EXT4_CASEFOLD_FL)
+		new_fl |= S_CASEFOLD;
 	inode_set_flags(inode, new_fl,
 			S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|S_DAX|
-			S_ENCRYPTED);
+			S_ENCRYPTED|S_CASEFOLD);
 }
 
 static blkcnt_t ext4_inode_blocks(struct ext4_inode *raw_inode,
@@ -5072,7 +5089,7 @@ struct inode *__ext4_iget(struct super_block *sb, unsigned long ino,
 			ret = -EFSCORRUPTED;
 			goto bad_inode;
 		}
-		if (ext4_encrypted_inode(inode)) {
+		if (IS_ENCRYPTED(inode)) {
 			inode->i_op = &ext4_encrypted_symlink_inode_operations;
 			ext4_set_aops(inode);
 		} else if (ext4_inode_is_fast_symlink(inode)) {
@@ -5351,7 +5368,6 @@ static int ext4_do_update_inode(handle_t *handle,
 		err = ext4_journal_get_write_access(handle, EXT4_SB(sb)->s_sbh);
 		if (err)
 			goto out_brelse;
-		ext4_update_dynamic_rev(sb);
 		ext4_set_feature_large_file(sb);
 		ext4_handle_sync(handle);
 		err = ext4_handle_dirty_super(handle, sb);
@@ -5523,6 +5539,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
 	if (unlikely(ext4_forced_shutdown(EXT4_SB(inode->i_sb))))
 		return -EIO;
 
+	if (unlikely(IS_IMMUTABLE(inode)))
+		return -EPERM;
+
+	if (unlikely(IS_APPEND(inode) &&
+		     (ia_valid & (ATTR_MODE | ATTR_UID |
+				  ATTR_GID | ATTR_TIMES_SET))))
+		return -EPERM;
+
 	error = setattr_prepare(dentry, attr);
 	if (error)
 		return error;
@@ -5574,7 +5598,7 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
 	if (attr->ia_valid & ATTR_SIZE) {
 		handle_t *handle;
 		loff_t oldsize = inode->i_size;
-		int shrink = (attr->ia_size <= inode->i_size);
+		int shrink = (attr->ia_size < inode->i_size);
 
 		if (!(ext4_test_inode_flag(inode, EXT4_INODE_EXTENTS))) {
 			struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
@@ -5588,18 +5612,33 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
 		if (IS_I_VERSION(inode) && attr->ia_size != inode->i_size)
 			inode_inc_iversion(inode);
 
-		if (ext4_should_order_data(inode) &&
-		    (attr->ia_size < inode->i_size)) {
-			error = ext4_begin_ordered_truncate(inode,
+		if (shrink) {
+			if (ext4_should_order_data(inode)) {
+				error = ext4_begin_ordered_truncate(inode,
 							    attr->ia_size);
-			if (error)
-				goto err_out;
+				if (error)
+					goto err_out;
+			}
+			/*
+			 * Blocks are going to be removed from the inode. Wait
+			 * for dio in flight.
+			 */
+			inode_dio_wait(inode);
+		}
+
+		down_write(&EXT4_I(inode)->i_mmap_sem);
+
+		rc = ext4_break_layouts(inode);
+		if (rc) {
+			up_write(&EXT4_I(inode)->i_mmap_sem);
+			return rc;
 		}
+
 		if (attr->ia_size != inode->i_size) {
 			handle = ext4_journal_start(inode, EXT4_HT_INODE, 3);
 			if (IS_ERR(handle)) {
 				error = PTR_ERR(handle);
-				goto err_out;
+				goto out_mmap_sem;
 			}
 			if (ext4_handle_valid(handle) && shrink) {
 				error = ext4_orphan_add(handle, inode);
@@ -5627,33 +5666,14 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
 				i_size_write(inode, attr->ia_size);
 			up_write(&EXT4_I(inode)->i_data_sem);
 			ext4_journal_stop(handle);
-			if (error) {
-				if (orphan)
-					ext4_orphan_del(NULL, inode);
-				goto err_out;
-			}
-		}
-		if (!shrink)
-			pagecache_isize_extended(inode, oldsize, inode->i_size);
-
-		/*
-		 * Blocks are going to be removed from the inode. Wait
-		 * for dio in flight.  Temporarily disable
-		 * dioread_nolock to prevent livelock.
-		 */
-		if (orphan) {
-			if (!ext4_should_journal_data(inode)) {
-				inode_dio_wait(inode);
-			} else
+			if (error)
+				goto out_mmap_sem;
+			if (!shrink) {
+				pagecache_isize_extended(inode, oldsize,
+							 inode->i_size);
+			} else if (ext4_should_journal_data(inode)) {
 				ext4_wait_for_tail_page_commit(inode);
-		}
-		down_write(&EXT4_I(inode)->i_mmap_sem);
-
-		rc = ext4_break_layouts(inode);
-		if (rc) {
-			up_write(&EXT4_I(inode)->i_mmap_sem);
-			error = rc;
-			goto err_out;
+			}
 		}
 
 		/*
@@ -5661,11 +5681,16 @@ int ext4_setattr(struct dentry *dentry, struct iattr *attr)
 		 * in data=journal mode to make pages freeable.
 		 */
 		truncate_pagecache(inode, inode->i_size);
-		if (shrink) {
+		/*
+		 * Call ext4_truncate() even if i_size didn't change to
+		 * truncate possible preallocated blocks.
+		 */
+		if (attr->ia_size <= oldsize) {
 			rc = ext4_truncate(inode);
 			if (rc)
 				error = rc;
 		}
+out_mmap_sem:
 		up_write(&EXT4_I(inode)->i_mmap_sem);
 	}
 
@@ -6002,7 +6027,7 @@ int ext4_expand_extra_isize(struct inode *inode,
 
 	ext4_write_lock_xattr(inode, &no_expand);
 
-	BUFFER_TRACE(iloc.bh, "get_write_access");
+	BUFFER_TRACE(iloc->bh, "get_write_access");
 	error = ext4_journal_get_write_access(handle, iloc->bh);
 	if (error) {
 		brelse(iloc->bh);
@@ -6089,36 +6114,6 @@ out:
 	return;
 }
 
-#if 0
-/*
- * Bind an inode's backing buffer_head into this transaction, to prevent
- * it from being flushed to disk early.  Unlike
- * ext4_reserve_inode_write, this leaves behind no bh reference and
- * returns no iloc structure, so the caller needs to repeat the iloc
- * lookup to mark the inode dirty later.
- */
-static int ext4_pin_inode(handle_t *handle, struct inode *inode)
-{
-	struct ext4_iloc iloc;
-
-	int err = 0;
-	if (handle) {
-		err = ext4_get_inode_loc(inode, &iloc);
-		if (!err) {
-			BUFFER_TRACE(iloc.bh, "get_write_access");
-			err = jbd2_journal_get_write_access(handle, iloc.bh);
-			if (!err)
-				err = ext4_handle_dirty_metadata(handle,
-								 NULL,
-								 iloc.bh);
-			brelse(iloc.bh);
-		}
-	}
-	ext4_std_error(inode->i_sb, err);
-	return err;
-}
-#endif
-
 int ext4_change_inode_journal_flag(struct inode *inode, int val)
 {
 	journal_t *journal;
@@ -6226,6 +6221,9 @@ vm_fault_t ext4_page_mkwrite(struct vm_fault *vmf)
 	get_block_t *get_block;
 	int retries = 0;
 
+	if (unlikely(IS_IMMUTABLE(inode)))
+		return VM_FAULT_SIGBUS;
+
 	sb_start_pagefault(inode->i_sb);
 	file_update_time(vma->vm_file);
 
diff --git a/fs/ext4/ioctl.c b/fs/ext4/ioctl.c
index d37dafa1d133..442f7ef873fc 100644
--- a/fs/ext4/ioctl.c
+++ b/fs/ext4/ioctl.c
@@ -63,18 +63,20 @@ static void swap_inode_data(struct inode *inode1, struct inode *inode2)
 	loff_t isize;
 	struct ext4_inode_info *ei1;
 	struct ext4_inode_info *ei2;
+	unsigned long tmp;
 
 	ei1 = EXT4_I(inode1);
 	ei2 = EXT4_I(inode2);
 
 	swap(inode1->i_version, inode2->i_version);
-	swap(inode1->i_blocks, inode2->i_blocks);
-	swap(inode1->i_bytes, inode2->i_bytes);
 	swap(inode1->i_atime, inode2->i_atime);
 	swap(inode1->i_mtime, inode2->i_mtime);
 
 	memswap(ei1->i_data, ei2->i_data, sizeof(ei1->i_data));
-	swap(ei1->i_flags, ei2->i_flags);
+	tmp = ei1->i_flags & EXT4_FL_SHOULD_SWAP;
+	ei1->i_flags = (ei2->i_flags & EXT4_FL_SHOULD_SWAP) |
+		(ei1->i_flags & ~EXT4_FL_SHOULD_SWAP);
+	ei2->i_flags = tmp | (ei2->i_flags & ~EXT4_FL_SHOULD_SWAP);
 	swap(ei1->i_disksize, ei2->i_disksize);
 	ext4_es_remove_extent(inode1, 0, EXT_MAX_BLOCKS);
 	ext4_es_remove_extent(inode2, 0, EXT_MAX_BLOCKS);
@@ -115,28 +117,42 @@ static long swap_inode_boot_loader(struct super_block *sb,
 	int err;
 	struct inode *inode_bl;
 	struct ext4_inode_info *ei_bl;
-
-	if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
-	    IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
-	    ext4_has_inline_data(inode))
-		return -EINVAL;
-
-	if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
-	    !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN))
-		return -EPERM;
+	qsize_t size, size_bl, diff;
+	blkcnt_t blocks;
+	unsigned short bytes;
 
 	inode_bl = ext4_iget(sb, EXT4_BOOT_LOADER_INO, EXT4_IGET_SPECIAL);
 	if (IS_ERR(inode_bl))
 		return PTR_ERR(inode_bl);
 	ei_bl = EXT4_I(inode_bl);
 
-	filemap_flush(inode->i_mapping);
-	filemap_flush(inode_bl->i_mapping);
-
 	/* Protect orig inodes against a truncate and make sure,
 	 * that only 1 swap_inode_boot_loader is running. */
 	lock_two_nondirectories(inode, inode_bl);
 
+	if (inode->i_nlink != 1 || !S_ISREG(inode->i_mode) ||
+	    IS_SWAPFILE(inode) || IS_ENCRYPTED(inode) ||
+	    (EXT4_I(inode)->i_flags & EXT4_JOURNAL_DATA_FL) ||
+	    ext4_has_inline_data(inode)) {
+		err = -EINVAL;
+		goto journal_err_out;
+	}
+
+	if (IS_RDONLY(inode) || IS_APPEND(inode) || IS_IMMUTABLE(inode) ||
+	    !inode_owner_or_capable(inode) || !capable(CAP_SYS_ADMIN)) {
+		err = -EPERM;
+		goto journal_err_out;
+	}
+
+	down_write(&EXT4_I(inode)->i_mmap_sem);
+	err = filemap_write_and_wait(inode->i_mapping);
+	if (err)
+		goto err_out;
+
+	err = filemap_write_and_wait(inode_bl->i_mapping);
+	if (err)
+		goto err_out;
+
 	/* Wait for all existing dio workers */
 	inode_dio_wait(inode);
 	inode_dio_wait(inode_bl);
@@ -147,7 +163,7 @@ static long swap_inode_boot_loader(struct super_block *sb,
 	handle = ext4_journal_start(inode_bl, EXT4_HT_MOVE_EXTENTS, 2);
 	if (IS_ERR(handle)) {
 		err = -EINVAL;
-		goto journal_err_out;
+		goto err_out;
 	}
 
 	/* Protect extent tree against block allocations via delalloc */
@@ -170,6 +186,13 @@ static long swap_inode_boot_loader(struct super_block *sb,
 			memset(ei_bl->i_data, 0, sizeof(ei_bl->i_data));
 	}
 
+	err = dquot_initialize(inode);
+	if (err)
+		goto err_out1;
+
+	size = (qsize_t)(inode->i_blocks) * (1 << 9) + inode->i_bytes;
+	size_bl = (qsize_t)(inode_bl->i_blocks) * (1 << 9) + inode_bl->i_bytes;
+	diff = size - size_bl;
 	swap_inode_data(inode, inode_bl);
 
 	inode->i_ctime = inode_bl->i_ctime = current_time(inode);
@@ -183,34 +206,58 @@ static long swap_inode_boot_loader(struct super_block *sb,
 
 	err = ext4_mark_inode_dirty(handle, inode);
 	if (err < 0) {
+		/* No need to update quota information. */
 		ext4_warning(inode->i_sb,
 			"couldn't mark inode #%lu dirty (err %d)",
 			inode->i_ino, err);
 		/* Revert all changes: */
 		swap_inode_data(inode, inode_bl);
 		ext4_mark_inode_dirty(handle, inode);
-	} else {
-		err = ext4_mark_inode_dirty(handle, inode_bl);
-		if (err < 0) {
-			ext4_warning(inode_bl->i_sb,
-				"couldn't mark inode #%lu dirty (err %d)",
-				inode_bl->i_ino, err);
-			/* Revert all changes: */
-			swap_inode_data(inode, inode_bl);
-			ext4_mark_inode_dirty(handle, inode);
-			ext4_mark_inode_dirty(handle, inode_bl);
-		}
+		goto err_out1;
+	}
+
+	blocks = inode_bl->i_blocks;
+	bytes = inode_bl->i_bytes;
+	inode_bl->i_blocks = inode->i_blocks;
+	inode_bl->i_bytes = inode->i_bytes;
+	err = ext4_mark_inode_dirty(handle, inode_bl);
+	if (err < 0) {
+		/* No need to update quota information. */
+		ext4_warning(inode_bl->i_sb,
+			"couldn't mark inode #%lu dirty (err %d)",
+			inode_bl->i_ino, err);
+		goto revert;
+	}
+
+	/* Bootloader inode should not be counted into quota information. */
+	if (diff > 0)
+		dquot_free_space(inode, diff);
+	else
+		err = dquot_alloc_space(inode, -1 * diff);
+
+	if (err < 0) {
+revert:
+		/* Revert all changes: */
+		inode_bl->i_blocks = blocks;
+		inode_bl->i_bytes = bytes;
+		swap_inode_data(inode, inode_bl);
+		ext4_mark_inode_dirty(handle, inode);
+		ext4_mark_inode_dirty(handle, inode_bl);
 	}
+
+err_out1:
 	ext4_journal_stop(handle);
 	ext4_double_up_write_data_sem(inode, inode_bl);
 
+err_out:
+	up_write(&EXT4_I(inode)->i_mmap_sem);
 journal_err_out:
 	unlock_two_nondirectories(inode, inode_bl);
 	iput(inode_bl);
 	return err;
 }
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 static int uuid_is_zero(__u8 u[16])
 {
 	int	i;
@@ -222,6 +269,29 @@ static int uuid_is_zero(__u8 u[16])
 }
 #endif
 
+/*
+ * If immutable is set and we are not clearing it, we're not allowed to change
+ * anything else in the inode.  Don't error out if we're only trying to set
+ * immutable on an immutable file.
+ */
+static int ext4_ioctl_check_immutable(struct inode *inode, __u32 new_projid,
+				      unsigned int flags)
+{
+	struct ext4_inode_info *ei = EXT4_I(inode);
+	unsigned int oldflags = ei->i_flags;
+
+	if (!(oldflags & EXT4_IMMUTABLE_FL) || !(flags & EXT4_IMMUTABLE_FL))
+		return 0;
+
+	if ((oldflags & ~EXT4_IMMUTABLE_FL) != (flags & ~EXT4_IMMUTABLE_FL))
+		return -EPERM;
+	if (ext4_has_feature_project(inode->i_sb) &&
+	    __kprojid_val(ei->i_projid) != new_projid)
+		return -EPERM;
+
+	return 0;
+}
+
 static int ext4_ioctl_setflags(struct inode *inode,
 			       unsigned int flags)
 {
@@ -231,6 +301,7 @@ static int ext4_ioctl_setflags(struct inode *inode,
 	struct ext4_iloc iloc;
 	unsigned int oldflags, mask, i;
 	unsigned int jflag;
+	struct super_block *sb = inode->i_sb;
 
 	/* Is it quota file? Do not allow user to mess with it */
 	if (ext4_is_quota_file(inode))
@@ -241,16 +312,9 @@ static int ext4_ioctl_setflags(struct inode *inode,
 	/* The JOURNAL_DATA flag is modifiable only by root */
 	jflag = flags & EXT4_JOURNAL_DATA_FL;
 
-	/*
-	 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
-	 * the relevant capability.
-	 *
-	 * This test looks nicer. Thanks to Pauline Middelink
-	 */
-	if ((flags ^ oldflags) & (EXT4_APPEND_FL | EXT4_IMMUTABLE_FL)) {
-		if (!capable(CAP_LINUX_IMMUTABLE))
-			goto flags_out;
-	}
+	err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+	if (err)
+		goto flags_out;
 
 	/*
 	 * The JOURNAL_DATA flag can only be changed by
@@ -275,6 +339,37 @@ static int ext4_ioctl_setflags(struct inode *inode,
 			goto flags_out;
 	}
 
+	if ((flags ^ oldflags) & EXT4_CASEFOLD_FL) {
+		if (!ext4_has_feature_casefold(sb)) {
+			err = -EOPNOTSUPP;
+			goto flags_out;
+		}
+
+		if (!S_ISDIR(inode->i_mode)) {
+			err = -ENOTDIR;
+			goto flags_out;
+		}
+
+		if (!ext4_empty_dir(inode)) {
+			err = -ENOTEMPTY;
+			goto flags_out;
+		}
+	}
+
+	/*
+	 * Wait for all pending directio and then flush all the dirty pages
+	 * for this file.  The flush marks all the pages readonly, so any
+	 * subsequent attempt to write to the file (particularly mmap pages)
+	 * will come through the filesystem and fail.
+	 */
+	if (S_ISREG(inode->i_mode) && !IS_IMMUTABLE(inode) &&
+	    (flags & EXT4_IMMUTABLE_FL)) {
+		inode_dio_wait(inode);
+		err = filemap_write_and_wait(inode->i_mapping);
+		if (err)
+			goto flags_out;
+	}
+
 	handle = ext4_journal_start(inode, EXT4_HT_INODE, 1);
 	if (IS_ERR(handle)) {
 		err = PTR_ERR(handle);
@@ -543,7 +638,7 @@ static int ext4_getfsmap_format(struct ext4_fsmap *xfm, void *priv)
 static int ext4_ioc_getfsmap(struct super_block *sb,
 			     struct fsmap_head __user *arg)
 {
-	struct getfsmap_info info = {0};
+	struct getfsmap_info info = { NULL };
 	struct ext4_fsmap_head xhead = {0};
 	struct fsmap_head head;
 	bool aborted = false;
@@ -639,28 +734,15 @@ group_add_out:
 	return err;
 }
 
-static int ext4_ioctl_check_project(struct inode *inode, struct fsxattr *fa)
+static void ext4_fill_fsxattr(struct inode *inode, struct fsxattr *fa)
 {
-	/*
-	 * Project Quota ID state is only allowed to change from within the init
-	 * namespace. Enforce that restriction only if we are trying to change
-	 * the quota ID state. Everything else is allowed in user namespaces.
-	 */
-	if (current_user_ns() == &init_user_ns)
-		return 0;
-
-	if (__kprojid_val(EXT4_I(inode)->i_projid) != fa->fsx_projid)
-		return -EINVAL;
+	struct ext4_inode_info *ei = EXT4_I(inode);
 
-	if (ext4_test_inode_flag(inode, EXT4_INODE_PROJINHERIT)) {
-		if (!(fa->fsx_xflags & FS_XFLAG_PROJINHERIT))
-			return -EINVAL;
-	} else {
-		if (fa->fsx_xflags & FS_XFLAG_PROJINHERIT)
-			return -EINVAL;
-	}
+	simple_fill_fsxattr(fa, ext4_iflags_to_xflags(ei->i_flags &
+						      EXT4_FL_USER_VISIBLE));
 
-	return 0;
+	if (ext4_has_feature_project(inode->i_sb))
+		fa->fsx_projid = from_kprojid(&init_user_ns, ei->i_projid);
 }
 
 long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
@@ -677,6 +759,8 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		return ext4_ioc_getfsmap(sb, (void __user *)arg);
 	case EXT4_IOC_GETFLAGS:
 		flags = ei->i_flags & EXT4_FL_USER_VISIBLE;
+		if (S_ISREG(inode->i_mode))
+			flags &= ~EXT4_PROJINHERIT_FL;
 		return put_user(flags, (int __user *) arg);
 	case EXT4_IOC_SETFLAGS: {
 		int err;
@@ -704,7 +788,11 @@ long ext4_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 			return err;
 
 		inode_lock(inode);
-		err = ext4_ioctl_setflags(inode, flags);
+		err = ext4_ioctl_check_immutable(inode,
+				from_kprojid(&init_user_ns, ei->i_projid),
+				flags);
+		if (!err)
+			err = ext4_ioctl_setflags(inode, flags);
 		inode_unlock(inode);
 		mnt_drop_write_file(filp);
 		return err;
@@ -931,7 +1019,7 @@ mext_out:
 		if (err == 0)
 			err = err2;
 		mnt_drop_write_file(filp);
-		if (!err && (o_group > EXT4_SB(sb)->s_groups_count) &&
+		if (!err && (o_group < EXT4_SB(sb)->s_groups_count) &&
 		    ext4_has_group_desc_csum(sb) &&
 		    test_opt(sb, INIT_INODE_TABLE))
 			err = ext4_register_li_request(sb, o_group);
@@ -953,6 +1041,13 @@ resizefs_out:
 		if (!blk_queue_discard(q))
 			return -EOPNOTSUPP;
 
+		/*
+		 * We haven't replayed the journal, so we cannot use our
+		 * block-bitmap-guided storage zapping commands.
+		 */
+		if (test_opt(sb, NOLOAD) && ext4_has_feature_journal(sb))
+			return -EROFS;
+
 		if (copy_from_user(&range, (struct fstrim_range __user *)arg,
 		    sizeof(range)))
 			return -EFAULT;
@@ -978,7 +1073,7 @@ resizefs_out:
 		return fscrypt_ioctl_set_policy(filp, (const void __user *)arg);
 
 	case EXT4_IOC_GET_ENCRYPTION_PWSALT: {
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 		int err, err2;
 		struct ext4_sb_info *sbi = EXT4_SB(sb);
 		handle_t *handle;
@@ -1024,13 +1119,7 @@ resizefs_out:
 	{
 		struct fsxattr fa;
 
-		memset(&fa, 0, sizeof(struct fsxattr));
-		fa.fsx_xflags = ext4_iflags_to_xflags(ei->i_flags & EXT4_FL_USER_VISIBLE);
-
-		if (ext4_has_feature_project(inode->i_sb)) {
-			fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
-				EXT4_I(inode)->i_projid);
-		}
+		ext4_fill_fsxattr(inode, &fa);
 
 		if (copy_to_user((struct fsxattr __user *)arg,
 				 &fa, sizeof(fa)))
@@ -1039,7 +1128,7 @@ resizefs_out:
 	}
 	case EXT4_IOC_FSSETXATTR:
 	{
-		struct fsxattr fa;
+		struct fsxattr fa, old_fa;
 		int err;
 
 		if (copy_from_user(&fa, (struct fsxattr __user *)arg,
@@ -1062,11 +1151,15 @@ resizefs_out:
 			return err;
 
 		inode_lock(inode);
-		err = ext4_ioctl_check_project(inode, &fa);
+		ext4_fill_fsxattr(inode, &old_fa);
+		err = vfs_ioc_fssetxattr_check(inode, &old_fa, &fa);
 		if (err)
 			goto out;
 		flags = (ei->i_flags & ~EXT4_FL_XFLAG_VISIBLE) |
 			 (flags & EXT4_FL_XFLAG_VISIBLE);
+		err = ext4_ioctl_check_immutable(inode, fa.fsx_projid, flags);
+		if (err)
+			goto out;
 		err = ext4_ioctl_setflags(inode, flags);
 		if (err)
 			goto out;
diff --git a/fs/ext4/mballoc.c b/fs/ext4/mballoc.c
index e2248083cdca..a3e2767bdf2f 100644
--- a/fs/ext4/mballoc.c
+++ b/fs/ext4/mballoc.c
@@ -1539,7 +1539,7 @@ static int mb_find_extent(struct ext4_buddy *e4b, int block,
 		ex->fe_len += 1 << order;
 	}
 
-	if (ex->fe_start + ex->fe_len > (1 << (e4b->bd_blkbits + 3))) {
+	if (ex->fe_start + ex->fe_len > EXT4_CLUSTERS_PER_GROUP(e4b->bd_sb)) {
 		/* Should never happen! (but apparently sometimes does?!?) */
 		WARN_ON(1);
 		ext4_error(e4b->bd_sb, "corruption or bug in mb_find_extent "
@@ -2490,6 +2490,7 @@ static int ext4_mb_init_backend(struct super_block *sb)
 	sbi->s_buddy_cache->i_ino = EXT4_BAD_INO;
 	EXT4_I(sbi->s_buddy_cache)->i_disksize = 0;
 	for (i = 0; i < ngroups; i++) {
+		cond_resched();
 		desc = ext4_get_group_desc(sb, i, NULL);
 		if (desc == NULL) {
 			ext4_msg(sb, KERN_ERR, "can't read descriptor %u", i);
@@ -2705,6 +2706,7 @@ int ext4_mb_release(struct super_block *sb)
 
 	if (sbi->s_group_info) {
 		for (i = 0; i < ngroups; i++) {
+			cond_resched();
 			grinfo = ext4_get_group_info(sb, i);
 #ifdef DOUBLE_CHECK
 			kfree(grinfo->bb_bitmap);
@@ -4176,9 +4178,8 @@ static void ext4_mb_group_or_file(struct ext4_allocation_context *ac)
 	isize = (i_size_read(ac->ac_inode) + ac->ac_sb->s_blocksize - 1)
 		>> bsbits;
 
-	if ((size == isize) &&
-	    !ext4_fs_is_busy(sbi) &&
-	    (atomic_read(&ac->ac_inode->i_writecount) == 0)) {
+	if ((size == isize) && !ext4_fs_is_busy(sbi) &&
+	    !inode_is_open_for_write(ac->ac_inode)) {
 		ac->ac_flags |= EXT4_MB_HINT_NOPREALLOC;
 		return;
 	}
@@ -4258,7 +4259,7 @@ ext4_mb_initialize_context(struct ext4_allocation_context *ac,
 			(unsigned) ar->goal, ac->ac_flags, ac->ac_2order,
 			(unsigned) ar->lleft, (unsigned) ar->pleft,
 			(unsigned) ar->lright, (unsigned) ar->pright,
-			atomic_read(&ar->inode->i_writecount) ? "" : "non-");
+			inode_is_open_for_write(ar->inode) ? "" : "non-");
 	return 0;
 
 }
@@ -4695,8 +4696,9 @@ ext4_mb_free_metadata(handle_t *handle, struct ext4_buddy *e4b,
  * ext4_free_blocks() -- Free given blocks and update quota
  * @handle:		handle for this transaction
  * @inode:		inode
- * @block:		start physical block to free
- * @count:		number of blocks to count
+ * @bh:			optional buffer of the block to be freed
+ * @block:		starting physical block to be freed
+ * @count:		number of blocks to be freed
  * @flags:		flags used by ext4_free_blocks
  */
 void ext4_free_blocks(handle_t *handle, struct inode *inode,
diff --git a/fs/ext4/move_extent.c b/fs/ext4/move_extent.c
index 2f5be02fc6f6..30ce3dc69378 100644
--- a/fs/ext4/move_extent.c
+++ b/fs/ext4/move_extent.c
@@ -13,11 +13,10 @@
 #include "ext4_extents.h"
 
 /**
- * get_ext_path - Find an extent path for designated logical block number.
- *
- * @inode:	an inode which is searched
+ * get_ext_path() - Find an extent path for designated logical block number.
+ * @inode:	inode to be searched
  * @lblock:	logical block number to find an extent path
- * @path:	pointer to an extent path pointer (for output)
+ * @ppath:	pointer to an extent path pointer (for output)
  *
  * ext4_find_extent wrapper. Return 0 on success, or a negative error value
  * on failure.
@@ -42,8 +41,9 @@ get_ext_path(struct inode *inode, ext4_lblk_t lblock,
 }
 
 /**
- * ext4_double_down_write_data_sem - Acquire two inodes' write lock
- *                                   of i_data_sem
+ * ext4_double_down_write_data_sem() - write lock two inodes's i_data_sem
+ * @first: inode to be locked
+ * @second: inode to be locked
  *
  * Acquire write lock of i_data_sem of the two inodes
  */
@@ -390,7 +390,8 @@ data_copy:
 
 	/* Even in case of data=writeback it is reasonable to pin
 	 * inode to transaction, to prevent unexpected data loss */
-	*err = ext4_jbd2_inode_add_write(handle, orig_inode);
+	*err = ext4_jbd2_inode_add_write(handle, orig_inode,
+			(loff_t)orig_page_offset << PAGE_SHIFT, replaced_size);
 
 unlock_pages:
 	unlock_page(pagep[0]);
@@ -592,8 +593,7 @@ ext4_move_extents(struct file *o_filp, struct file *d_filp, __u64 orig_blk,
 		return -EOPNOTSUPP;
 	}
 
-	if (ext4_encrypted_inode(orig_inode) ||
-	    ext4_encrypted_inode(donor_inode)) {
+	if (IS_ENCRYPTED(orig_inode) || IS_ENCRYPTED(donor_inode)) {
 		ext4_msg(orig_inode->i_sb, KERN_ERR,
 			 "Online defrag not supported for encrypted files");
 		return -EOPNOTSUPP;
diff --git a/fs/ext4/namei.c b/fs/ext4/namei.c
index 2b928eb07fa2..129029534075 100644
--- a/fs/ext4/namei.c
+++ b/fs/ext4/namei.c
@@ -35,6 +35,7 @@
 #include <linux/buffer_head.h>
 #include <linux/bio.h>
 #include <linux/iversion.h>
+#include <linux/unicode.h>
 #include "ext4.h"
 #include "ext4_jbd2.h"
 
@@ -81,8 +82,18 @@ static struct buffer_head *ext4_append(handle_t *handle,
 static int ext4_dx_csum_verify(struct inode *inode,
 			       struct ext4_dir_entry *dirent);
 
+/*
+ * Hints to ext4_read_dirblock regarding whether we expect a directory
+ * block being read to be an index block, or a block containing
+ * directory entries (and if the latter, whether it was found via a
+ * logical block in an htree index block).  This is used to control
+ * what sort of sanity checkinig ext4_read_dirblock() will do on the
+ * directory block read from the storage device.  EITHER will means
+ * the caller doesn't know what kind of directory block will be read,
+ * so no specific verification will be done.
+ */
 typedef enum {
-	EITHER, INDEX, DIRENT
+	EITHER, INDEX, DIRENT, DIRENT_HTREE
 } dirblock_type_t;
 
 #define ext4_read_dirblock(inode, block, type) \
@@ -108,11 +119,14 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
 
 		return bh;
 	}
-	if (!bh) {
+	if (!bh && (type == INDEX || type == DIRENT_HTREE)) {
 		ext4_error_inode(inode, func, line, block,
-				 "Directory hole found");
+				 "Directory hole found for htree %s block",
+				 (type == INDEX) ? "index" : "leaf");
 		return ERR_PTR(-EFSCORRUPTED);
 	}
+	if (!bh)
+		return NULL;
 	dirent = (struct ext4_dir_entry *) bh->b_data;
 	/* Determine whether or not we have an index block */
 	if (is_dx(inode)) {
@@ -149,7 +163,7 @@ static struct buffer_head *__ext4_read_dirblock(struct inode *inode,
 		}
 	}
 	if (!is_dx_block) {
-		if (ext4_dirent_csum_verify(inode, dirent))
+		if (ext4_dirblock_csum_verify(inode, bh))
 			set_buffer_verified(bh);
 		else {
 			ext4_error_inode(inode, func, line, block,
@@ -279,9 +293,11 @@ static int ext4_dx_add_entry(handle_t *handle, struct ext4_filename *fname,
 			     struct inode *dir, struct inode *inode);
 
 /* checksumming functions */
-void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
-			    unsigned int blocksize)
+void ext4_initialize_dirent_tail(struct buffer_head *bh,
+				 unsigned int blocksize)
 {
+	struct ext4_dir_entry_tail *t = EXT4_DIRENT_TAIL(bh->b_data, blocksize);
+
 	memset(t, 0, sizeof(struct ext4_dir_entry_tail));
 	t->det_rec_len = ext4_rec_len_to_disk(
 			sizeof(struct ext4_dir_entry_tail), blocksize);
@@ -290,17 +306,17 @@ void initialize_dirent_tail(struct ext4_dir_entry_tail *t,
 
 /* Walk through a dirent block to find a checksum "dirent" at the tail */
 static struct ext4_dir_entry_tail *get_dirent_tail(struct inode *inode,
-						   struct ext4_dir_entry *de)
+						   struct buffer_head *bh)
 {
 	struct ext4_dir_entry_tail *t;
 
 #ifdef PARANOID
 	struct ext4_dir_entry *d, *top;
 
-	d = de;
-	top = (struct ext4_dir_entry *)(((void *)de) +
+	d = (struct ext4_dir_entry *)bh->b_data;
+	top = (struct ext4_dir_entry *)(bh->b_data +
 		(EXT4_BLOCK_SIZE(inode->i_sb) -
-		sizeof(struct ext4_dir_entry_tail)));
+		 sizeof(struct ext4_dir_entry_tail)));
 	while (d < top && d->rec_len)
 		d = (struct ext4_dir_entry *)(((void *)d) +
 		    le16_to_cpu(d->rec_len));
@@ -310,7 +326,7 @@ static struct ext4_dir_entry_tail *get_dirent_tail(struct inode *inode,
 
 	t = (struct ext4_dir_entry_tail *)d;
 #else
-	t = EXT4_DIRENT_TAIL(de, EXT4_BLOCK_SIZE(inode->i_sb));
+	t = EXT4_DIRENT_TAIL(bh->b_data, EXT4_BLOCK_SIZE(inode->i_sb));
 #endif
 
 	if (t->det_reserved_zero1 ||
@@ -322,8 +338,7 @@ static struct ext4_dir_entry_tail *get_dirent_tail(struct inode *inode,
 	return t;
 }
 
-static __le32 ext4_dirent_csum(struct inode *inode,
-			       struct ext4_dir_entry *dirent, int size)
+static __le32 ext4_dirblock_csum(struct inode *inode, void *dirent, int size)
 {
 	struct ext4_sb_info *sbi = EXT4_SB(inode->i_sb);
 	struct ext4_inode_info *ei = EXT4_I(inode);
@@ -343,49 +358,49 @@ static void __warn_no_space_for_csum(struct inode *inode, const char *func,
 		"No space for directory leaf checksum. Please run e2fsck -D.");
 }
 
-int ext4_dirent_csum_verify(struct inode *inode, struct ext4_dir_entry *dirent)
+int ext4_dirblock_csum_verify(struct inode *inode, struct buffer_head *bh)
 {
 	struct ext4_dir_entry_tail *t;
 
 	if (!ext4_has_metadata_csum(inode->i_sb))
 		return 1;
 
-	t = get_dirent_tail(inode, dirent);
+	t = get_dirent_tail(inode, bh);
 	if (!t) {
 		warn_no_space_for_csum(inode);
 		return 0;
 	}
 
-	if (t->det_checksum != ext4_dirent_csum(inode, dirent,
-						(void *)t - (void *)dirent))
+	if (t->det_checksum != ext4_dirblock_csum(inode, bh->b_data,
+						  (char *)t - bh->b_data))
 		return 0;
 
 	return 1;
 }
 
-static void ext4_dirent_csum_set(struct inode *inode,
-				 struct ext4_dir_entry *dirent)
+static void ext4_dirblock_csum_set(struct inode *inode,
+				 struct buffer_head *bh)
 {
 	struct ext4_dir_entry_tail *t;
 
 	if (!ext4_has_metadata_csum(inode->i_sb))
 		return;
 
-	t = get_dirent_tail(inode, dirent);
+	t = get_dirent_tail(inode, bh);
 	if (!t) {
 		warn_no_space_for_csum(inode);
 		return;
 	}
 
-	t->det_checksum = ext4_dirent_csum(inode, dirent,
-					   (void *)t - (void *)dirent);
+	t->det_checksum = ext4_dirblock_csum(inode, bh->b_data,
+					     (char *)t - bh->b_data);
 }
 
-int ext4_handle_dirty_dirent_node(handle_t *handle,
-				  struct inode *inode,
-				  struct buffer_head *bh)
+int ext4_handle_dirty_dirblock(handle_t *handle,
+			       struct inode *inode,
+			       struct buffer_head *bh)
 {
-	ext4_dirent_csum_set(inode, (struct ext4_dir_entry *)bh->b_data);
+	ext4_dirblock_csum_set(inode, bh);
 	return ext4_handle_dirty_metadata(handle, inode, bh);
 }
 
@@ -612,7 +627,7 @@ static struct stats dx_show_leaf(struct inode *dir,
 		{
 			if (show_names)
 			{
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 				int len;
 				char *name;
 				struct fscrypt_str fname_crypto_str =
@@ -621,7 +636,7 @@ static struct stats dx_show_leaf(struct inode *dir,
 
 				name  = de->name;
 				len = de->name_len;
-				if (ext4_encrypted_inode(dir))
+				if (IS_ENCRYPTED(dir))
 					res = fscrypt_get_encryption_info(dir);
 				if (res) {
 					printk(KERN_WARNING "Error setting up"
@@ -629,7 +644,7 @@ static struct stats dx_show_leaf(struct inode *dir,
 				}
 				if (!fscrypt_has_encryption_key(dir)) {
 					/* Directory is not encrypted */
-					ext4fs_dirhash(de->name,
+					ext4fs_dirhash(dir, de->name,
 						de->name_len, &h);
 					printk("%*.s:(U)%x.%u ", len,
 					       name, h.hash,
@@ -662,8 +677,8 @@ static struct stats dx_show_leaf(struct inode *dir,
 						name = fname_crypto_str.name;
 						len = fname_crypto_str.len;
 					}
-					ext4fs_dirhash(de->name, de->name_len,
-						       &h);
+					ext4fs_dirhash(dir, de->name,
+						       de->name_len, &h);
 					printk("%*.s:(E)%x.%u ", len, name,
 					       h.hash, (unsigned) ((char *) de
 								   - base));
@@ -673,7 +688,7 @@ static struct stats dx_show_leaf(struct inode *dir,
 #else
 				int len = de->name_len;
 				char *name = de->name;
-				ext4fs_dirhash(de->name, de->name_len, &h);
+				ext4fs_dirhash(dir, de->name, de->name_len, &h);
 				printk("%*.s:%x.%u ", len, name, h.hash,
 				       (unsigned) ((char *) de - base));
 #endif
@@ -762,7 +777,7 @@ dx_probe(struct ext4_filename *fname, struct inode *dir,
 		hinfo->hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
 	hinfo->seed = EXT4_SB(dir->i_sb)->s_hash_seed;
 	if (fname && fname_name(fname))
-		ext4fs_dirhash(fname_name(fname), fname_len(fname), hinfo);
+		ext4fs_dirhash(dir, fname_name(fname), fname_len(fname), hinfo);
 	hash = hinfo->hash;
 
 	if (root->info.unused_flags & 1) {
@@ -871,12 +886,15 @@ static void dx_release(struct dx_frame *frames)
 {
 	struct dx_root_info *info;
 	int i;
+	unsigned int indirect_levels;
 
 	if (frames[0].bh == NULL)
 		return;
 
 	info = &((struct dx_root *)frames[0].bh->b_data)->info;
-	for (i = 0; i <= info->indirect_levels; i++) {
+	/* save local copy, "info" may be freed after brelse() */
+	indirect_levels = info->indirect_levels;
+	for (i = 0; i <= indirect_levels; i++) {
 		if (frames[i].bh == NULL)
 			break;
 		brelse(frames[i].bh);
@@ -976,7 +994,7 @@ static int htree_dirblock_to_tree(struct file *dir_file,
 
 	dxtrace(printk(KERN_INFO "In htree dirblock_to_tree: block %lu\n",
 							(unsigned long)block));
-	bh = ext4_read_dirblock(dir, block, DIRENT);
+	bh = ext4_read_dirblock(dir, block, DIRENT_HTREE);
 	if (IS_ERR(bh))
 		return PTR_ERR(bh);
 
@@ -984,9 +1002,9 @@ static int htree_dirblock_to_tree(struct file *dir_file,
 	top = (struct ext4_dir_entry_2 *) ((char *) de +
 					   dir->i_sb->s_blocksize -
 					   EXT4_DIR_REC_LEN(0));
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	/* Check if the directory is encrypted */
-	if (ext4_encrypted_inode(dir)) {
+	if (IS_ENCRYPTED(dir)) {
 		err = fscrypt_get_encryption_info(dir);
 		if (err < 0) {
 			brelse(bh);
@@ -1008,14 +1026,14 @@ static int htree_dirblock_to_tree(struct file *dir_file,
 			/* silently ignore the rest of the block */
 			break;
 		}
-		ext4fs_dirhash(de->name, de->name_len, hinfo);
+		ext4fs_dirhash(dir, de->name, de->name_len, hinfo);
 		if ((hinfo->hash < start_hash) ||
 		    ((hinfo->hash == start_hash) &&
 		     (hinfo->minor_hash < start_minor_hash)))
 			continue;
 		if (de->inode == 0)
 			continue;
-		if (!ext4_encrypted_inode(dir)) {
+		if (!IS_ENCRYPTED(dir)) {
 			tmp_str.name = de->name;
 			tmp_str.len = de->name_len;
 			err = ext4_htree_store_dirent(dir_file,
@@ -1047,7 +1065,7 @@ static int htree_dirblock_to_tree(struct file *dir_file,
 	}
 errout:
 	brelse(bh);
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	fscrypt_fname_free_buffer(&fname_crypto_str);
 #endif
 	return count;
@@ -1086,10 +1104,10 @@ int ext4_htree_fill_tree(struct file *dir_file, __u32 start_hash,
 		hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
 		if (ext4_has_inline_data(dir)) {
 			int has_inline_data = 1;
-			count = htree_inlinedir_to_tree(dir_file, dir, 0,
-							&hinfo, start_hash,
-							start_minor_hash,
-							&has_inline_data);
+			count = ext4_inlinedir_to_tree(dir_file, dir, 0,
+						       &hinfo, start_hash,
+						       start_minor_hash,
+						       &has_inline_data);
 			if (has_inline_data) {
 				*next_hash = ~0;
 				return count;
@@ -1197,7 +1215,7 @@ static int dx_make_map(struct inode *dir, struct ext4_dir_entry_2 *de,
 
 	while ((char *) de < base + blocksize) {
 		if (de->name_len && de->inode) {
-			ext4fs_dirhash(de->name, de->name_len, &h);
+			ext4fs_dirhash(dir, de->name, de->name_len, &h);
 			map_tail--;
 			map_tail->hash = h.hash;
 			map_tail->offs = ((char *) de - base)>>2;
@@ -1252,24 +1270,105 @@ static void dx_insert_block(struct dx_frame *frame, u32 hash, ext4_lblk_t block)
 	dx_set_count(entries, count + 1);
 }
 
+#ifdef CONFIG_UNICODE
+/*
+ * Test whether a case-insensitive directory entry matches the filename
+ * being searched for.  If quick is set, assume the name being looked up
+ * is already in the casefolded form.
+ *
+ * Returns: 0 if the directory entry matches, more than 0 if it
+ * doesn't match or less than zero on error.
+ */
+int ext4_ci_compare(const struct inode *parent, const struct qstr *name,
+		    const struct qstr *entry, bool quick)
+{
+	const struct ext4_sb_info *sbi = EXT4_SB(parent->i_sb);
+	const struct unicode_map *um = sbi->s_encoding;
+	int ret;
+
+	if (quick)
+		ret = utf8_strncasecmp_folded(um, name, entry);
+	else
+		ret = utf8_strncasecmp(um, name, entry);
+
+	if (ret < 0) {
+		/* Handle invalid character sequence as either an error
+		 * or as an opaque byte sequence.
+		 */
+		if (ext4_has_strict_mode(sbi))
+			return -EINVAL;
+
+		if (name->len != entry->len)
+			return 1;
+
+		return !!memcmp(name->name, entry->name, name->len);
+	}
+
+	return ret;
+}
+
+void ext4_fname_setup_ci_filename(struct inode *dir, const struct qstr *iname,
+				  struct fscrypt_str *cf_name)
+{
+	int len;
+
+	if (!IS_CASEFOLDED(dir)) {
+		cf_name->name = NULL;
+		return;
+	}
+
+	cf_name->name = kmalloc(EXT4_NAME_LEN, GFP_NOFS);
+	if (!cf_name->name)
+		return;
+
+	len = utf8_casefold(EXT4_SB(dir->i_sb)->s_encoding,
+			    iname, cf_name->name,
+			    EXT4_NAME_LEN);
+	if (len <= 0) {
+		kfree(cf_name->name);
+		cf_name->name = NULL;
+		return;
+	}
+	cf_name->len = (unsigned) len;
+
+}
+#endif
+
 /*
  * Test whether a directory entry matches the filename being searched for.
  *
  * Return: %true if the directory entry matches, otherwise %false.
  */
-static inline bool ext4_match(const struct ext4_filename *fname,
+static inline bool ext4_match(const struct inode *parent,
+			      const struct ext4_filename *fname,
 			      const struct ext4_dir_entry_2 *de)
 {
 	struct fscrypt_name f;
+#ifdef CONFIG_UNICODE
+	const struct qstr entry = {.name = de->name, .len = de->name_len};
+#endif
 
 	if (!de->inode)
 		return false;
 
 	f.usr_fname = fname->usr_fname;
 	f.disk_name = fname->disk_name;
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	f.crypto_buf = fname->crypto_buf;
 #endif
+
+#ifdef CONFIG_UNICODE
+	if (EXT4_SB(parent->i_sb)->s_encoding && IS_CASEFOLDED(parent)) {
+		if (fname->cf_name.name) {
+			struct qstr cf = {.name = fname->cf_name.name,
+					  .len = fname->cf_name.len};
+			return !ext4_ci_compare(parent, &cf, &entry, true);
+		}
+		return !ext4_ci_compare(parent, fname->usr_fname, &entry,
+					false);
+	}
+#endif
+
 	return fscrypt_match_name(&f, de->name, de->name_len);
 }
 
@@ -1290,7 +1389,7 @@ int ext4_search_dir(struct buffer_head *bh, char *search_buf, int buf_size,
 		/* this code is executed quadratically often */
 		/* do minimal checking `by hand' */
 		if ((char *) de + de->name_len <= dlimit &&
-		    ext4_match(fname, de)) {
+		    ext4_match(dir, fname, de)) {
 			/* found a match - just to be sure, do
 			 * a full check */
 			if (ext4_check_dir_entry(dir, NULL, de, bh, bh->b_data,
@@ -1327,7 +1426,7 @@ static int is_dx_internal_node(struct inode *dir, ext4_lblk_t block,
 }
 
 /*
- *	ext4_find_entry()
+ *	__ext4_find_entry()
  *
  * finds an entry in the specified directory with the wanted name. It
  * returns the cache buffer in which the entry was found, and the entry
@@ -1337,39 +1436,32 @@ static int is_dx_internal_node(struct inode *dir, ext4_lblk_t block,
  * The returned buffer_head has ->b_count elevated.  The caller is expected
  * to brelse() it when appropriate.
  */
-static struct buffer_head * ext4_find_entry (struct inode *dir,
-					const struct qstr *d_name,
-					struct ext4_dir_entry_2 **res_dir,
-					int *inlined)
+static struct buffer_head *__ext4_find_entry(struct inode *dir,
+					     struct ext4_filename *fname,
+					     struct ext4_dir_entry_2 **res_dir,
+					     int *inlined)
 {
 	struct super_block *sb;
 	struct buffer_head *bh_use[NAMEI_RA_SIZE];
 	struct buffer_head *bh, *ret = NULL;
 	ext4_lblk_t start, block;
-	const u8 *name = d_name->name;
+	const u8 *name = fname->usr_fname->name;
 	size_t ra_max = 0;	/* Number of bh's in the readahead
 				   buffer, bh_use[] */
 	size_t ra_ptr = 0;	/* Current index into readahead
 				   buffer */
 	ext4_lblk_t  nblocks;
 	int i, namelen, retval;
-	struct ext4_filename fname;
 
 	*res_dir = NULL;
 	sb = dir->i_sb;
-	namelen = d_name->len;
+	namelen = fname->usr_fname->len;
 	if (namelen > EXT4_NAME_LEN)
 		return NULL;
 
-	retval = ext4_fname_setup_filename(dir, d_name, 1, &fname);
-	if (retval == -ENOENT)
-		return NULL;
-	if (retval)
-		return ERR_PTR(retval);
-
 	if (ext4_has_inline_data(dir)) {
 		int has_inline_data = 1;
-		ret = ext4_find_inline_entry(dir, &fname, res_dir,
+		ret = ext4_find_inline_entry(dir, fname, res_dir,
 					     &has_inline_data);
 		if (has_inline_data) {
 			if (inlined)
@@ -1389,7 +1481,7 @@ static struct buffer_head * ext4_find_entry (struct inode *dir,
 		goto restart;
 	}
 	if (is_dx(dir)) {
-		ret = ext4_dx_find_entry(dir, &fname, res_dir);
+		ret = ext4_dx_find_entry(dir, fname, res_dir);
 		/*
 		 * On success, or if the error was file not found,
 		 * return.  Otherwise, fall back to doing a search the
@@ -1444,8 +1536,7 @@ restart:
 		if (!buffer_verified(bh) &&
 		    !is_dx_internal_node(dir, block,
 					 (struct ext4_dir_entry *)bh->b_data) &&
-		    !ext4_dirent_csum_verify(dir,
-				(struct ext4_dir_entry *)bh->b_data)) {
+		    !ext4_dirblock_csum_verify(dir, bh)) {
 			EXT4_ERROR_INODE(dir, "checksumming directory "
 					 "block %lu", (unsigned long)block);
 			brelse(bh);
@@ -1453,7 +1544,7 @@ restart:
 			goto cleanup_and_exit;
 		}
 		set_buffer_verified(bh);
-		i = search_dirblock(bh, dir, &fname,
+		i = search_dirblock(bh, dir, fname,
 			    block << EXT4_BLOCK_SIZE_BITS(sb), res_dir);
 		if (i == 1) {
 			EXT4_I(dir)->i_dir_start_lookup = block;
@@ -1484,10 +1575,50 @@ cleanup_and_exit:
 	/* Clean up the read-ahead blocks */
 	for (; ra_ptr < ra_max; ra_ptr++)
 		brelse(bh_use[ra_ptr]);
-	ext4_fname_free_filename(&fname);
 	return ret;
 }
 
+static struct buffer_head *ext4_find_entry(struct inode *dir,
+					   const struct qstr *d_name,
+					   struct ext4_dir_entry_2 **res_dir,
+					   int *inlined)
+{
+	int err;
+	struct ext4_filename fname;
+	struct buffer_head *bh;
+
+	err = ext4_fname_setup_filename(dir, d_name, 1, &fname);
+	if (err == -ENOENT)
+		return NULL;
+	if (err)
+		return ERR_PTR(err);
+
+	bh = __ext4_find_entry(dir, &fname, res_dir, inlined);
+
+	ext4_fname_free_filename(&fname);
+	return bh;
+}
+
+static struct buffer_head *ext4_lookup_entry(struct inode *dir,
+					     struct dentry *dentry,
+					     struct ext4_dir_entry_2 **res_dir)
+{
+	int err;
+	struct ext4_filename fname;
+	struct buffer_head *bh;
+
+	err = ext4_fname_prepare_lookup(dir, dentry, &fname);
+	if (err == -ENOENT)
+		return NULL;
+	if (err)
+		return ERR_PTR(err);
+
+	bh = __ext4_find_entry(dir, &fname, res_dir, NULL);
+
+	ext4_fname_free_filename(&fname);
+	return bh;
+}
+
 static struct buffer_head * ext4_dx_find_entry(struct inode *dir,
 			struct ext4_filename *fname,
 			struct ext4_dir_entry_2 **res_dir)
@@ -1498,7 +1629,7 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir,
 	ext4_lblk_t block;
 	int retval;
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	*res_dir = NULL;
 #endif
 	frame = dx_probe(fname, dir, NULL, frames);
@@ -1506,7 +1637,7 @@ static struct buffer_head * ext4_dx_find_entry(struct inode *dir,
 		return (struct buffer_head *) frame;
 	do {
 		block = dx_get_block(frame->at);
-		bh = ext4_read_dirblock(dir, block, DIRENT);
+		bh = ext4_read_dirblock(dir, block, DIRENT_HTREE);
 		if (IS_ERR(bh))
 			goto errout;
 
@@ -1546,16 +1677,11 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
 	struct inode *inode;
 	struct ext4_dir_entry_2 *de;
 	struct buffer_head *bh;
-	int err;
-
-	err = fscrypt_prepare_lookup(dir, dentry, flags);
-	if (err)
-		return ERR_PTR(err);
 
 	if (dentry->d_name.len > EXT4_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-	bh = ext4_find_entry(dir, &dentry->d_name, &de, NULL);
+	bh = ext4_lookup_entry(dir, dentry, &de);
 	if (IS_ERR(bh))
 		return ERR_CAST(bh);
 	inode = NULL;
@@ -1578,7 +1704,7 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
 					 ino);
 			return ERR_PTR(-EFSCORRUPTED);
 		}
-		if (!IS_ERR(inode) && ext4_encrypted_inode(dir) &&
+		if (!IS_ERR(inode) && IS_ENCRYPTED(dir) &&
 		    (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 		    !fscrypt_has_permitted_context(dir, inode)) {
 			ext4_warning(inode->i_sb,
@@ -1588,6 +1714,17 @@ static struct dentry *ext4_lookup(struct inode *dir, struct dentry *dentry, unsi
 			return ERR_PTR(-EPERM);
 		}
 	}
+
+#ifdef CONFIG_UNICODE
+	if (!inode && IS_CASEFOLDED(dir)) {
+		/* Eventually we want to call d_add_ci(dentry, NULL)
+		 * for negative dentries in the encoding case as
+		 * well.  For now, prevent the negative dentry
+		 * from being cached.
+		 */
+		return NULL;
+	}
+#endif
 	return d_splice_alias(inode, dentry);
 }
 
@@ -1683,7 +1820,6 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 	char *data1 = (*bh)->b_data, *data2;
 	unsigned split, move, size;
 	struct ext4_dir_entry_2 *de = NULL, *de2;
-	struct ext4_dir_entry_tail *t;
 	int	csum_size = 0;
 	int	err = 0, i;
 
@@ -1744,11 +1880,8 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 					    (char *) de2,
 					    blocksize);
 	if (csum_size) {
-		t = EXT4_DIRENT_TAIL(data2, blocksize);
-		initialize_dirent_tail(t, blocksize);
-
-		t = EXT4_DIRENT_TAIL(data1, blocksize);
-		initialize_dirent_tail(t, blocksize);
+		ext4_initialize_dirent_tail(*bh, blocksize);
+		ext4_initialize_dirent_tail(bh2, blocksize);
 	}
 
 	dxtrace(dx_show_leaf(dir, hinfo, (struct ext4_dir_entry_2 *) data1,
@@ -1762,7 +1895,7 @@ static struct ext4_dir_entry_2 *do_split(handle_t *handle, struct inode *dir,
 		de = de2;
 	}
 	dx_insert_block(frame, hash2 + continued, newblock);
-	err = ext4_handle_dirty_dirent_node(handle, dir, bh2);
+	err = ext4_handle_dirty_dirblock(handle, dir, bh2);
 	if (err)
 		goto journal_error;
 	err = ext4_handle_dirty_dx_node(handle, dir, frame->bh);
@@ -1798,7 +1931,7 @@ int ext4_find_dest_de(struct inode *dir, struct inode *inode,
 		if (ext4_check_dir_entry(dir, NULL, de, bh,
 					 buf, buf_size, offset))
 			return -EFSCORRUPTED;
-		if (ext4_match(fname, de))
+		if (ext4_match(dir, fname, de))
 			return -EEXIST;
 		nlen = EXT4_DIR_REC_LEN(de->name_len);
 		rlen = ext4_rec_len_from_disk(de->rec_len, buf_size);
@@ -1890,7 +2023,7 @@ static int add_dirent_to_buf(handle_t *handle, struct ext4_filename *fname,
 	inode_inc_iversion(dir);
 	ext4_mark_inode_dirty(handle, dir);
 	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
-	err = ext4_handle_dirty_dirent_node(handle, dir, bh);
+	err = ext4_handle_dirty_dirblock(handle, dir, bh);
 	if (err)
 		ext4_std_error(dir->i_sb, err);
 	return 0;
@@ -1909,8 +2042,7 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
 	struct dx_frame	frames[EXT4_HTREE_LEVEL], *frame;
 	struct dx_entry *entries;
 	struct ext4_dir_entry_2	*de, *de2;
-	struct ext4_dir_entry_tail *t;
-	char		*data1, *top;
+	char		*data2, *top;
 	unsigned	len;
 	int		retval;
 	unsigned	blocksize;
@@ -1950,21 +2082,18 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
 		return PTR_ERR(bh2);
 	}
 	ext4_set_inode_flag(dir, EXT4_INODE_INDEX);
-	data1 = bh2->b_data;
+	data2 = bh2->b_data;
 
-	memcpy (data1, de, len);
-	de = (struct ext4_dir_entry_2 *) data1;
-	top = data1 + len;
+	memcpy(data2, de, len);
+	de = (struct ext4_dir_entry_2 *) data2;
+	top = data2 + len;
 	while ((char *)(de2 = ext4_next_entry(de, blocksize)) < top)
 		de = de2;
-	de->rec_len = ext4_rec_len_to_disk(data1 + (blocksize - csum_size) -
-					   (char *) de,
-					   blocksize);
+	de->rec_len = ext4_rec_len_to_disk(data2 + (blocksize - csum_size) -
+					   (char *) de, blocksize);
 
-	if (csum_size) {
-		t = EXT4_DIRENT_TAIL(data1, blocksize);
-		initialize_dirent_tail(t, blocksize);
-	}
+	if (csum_size)
+		ext4_initialize_dirent_tail(bh2, blocksize);
 
 	/* Initialize the root; the dot dirents already exist */
 	de = (struct ext4_dir_entry_2 *) (&root->dotdot);
@@ -1983,7 +2112,7 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
 	if (fname->hinfo.hash_version <= DX_HASH_TEA)
 		fname->hinfo.hash_version += EXT4_SB(dir->i_sb)->s_hash_unsigned;
 	fname->hinfo.seed = EXT4_SB(dir->i_sb)->s_hash_seed;
-	ext4fs_dirhash(fname_name(fname), fname_len(fname), &fname->hinfo);
+	ext4fs_dirhash(dir, fname_name(fname), fname_len(fname), &fname->hinfo);
 
 	memset(frames, 0, sizeof(frames));
 	frame = frames;
@@ -1994,7 +2123,7 @@ static int make_indexed_dir(handle_t *handle, struct ext4_filename *fname,
 	retval = ext4_handle_dirty_dx_node(handle, dir, frame->bh);
 	if (retval)
 		goto out_frames;	
-	retval = ext4_handle_dirty_dirent_node(handle, dir, bh2);
+	retval = ext4_handle_dirty_dirblock(handle, dir, bh2);
 	if (retval)
 		goto out_frames;	
 
@@ -2034,8 +2163,8 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 	struct inode *dir = d_inode(dentry->d_parent);
 	struct buffer_head *bh = NULL;
 	struct ext4_dir_entry_2 *de;
-	struct ext4_dir_entry_tail *t;
 	struct super_block *sb;
+	struct ext4_sb_info *sbi;
 	struct ext4_filename fname;
 	int	retval;
 	int	dx_fallback=0;
@@ -2047,10 +2176,17 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 		csum_size = sizeof(struct ext4_dir_entry_tail);
 
 	sb = dir->i_sb;
+	sbi = EXT4_SB(sb);
 	blocksize = sb->s_blocksize;
 	if (!dentry->d_name.len)
 		return -EINVAL;
 
+#ifdef CONFIG_UNICODE
+	if (ext4_has_strict_mode(sbi) && IS_CASEFOLDED(dir) &&
+	    utf8_validate(sbi->s_encoding, &dentry->d_name))
+		return -EINVAL;
+#endif
+
 	retval = ext4_fname_setup_filename(dir, &dentry->d_name, 0, &fname);
 	if (retval)
 		return retval;
@@ -2076,6 +2212,11 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 	blocks = dir->i_size >> sb->s_blocksize_bits;
 	for (block = 0; block < blocks; block++) {
 		bh = ext4_read_dirblock(dir, block, DIRENT);
+		if (bh == NULL) {
+			bh = ext4_bread(handle, dir, block,
+					EXT4_GET_BLOCKS_CREATE);
+			goto add_to_new_block;
+		}
 		if (IS_ERR(bh)) {
 			retval = PTR_ERR(bh);
 			bh = NULL;
@@ -2096,6 +2237,7 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 		brelse(bh);
 	}
 	bh = ext4_append(handle, dir, &block);
+add_to_new_block:
 	if (IS_ERR(bh)) {
 		retval = PTR_ERR(bh);
 		bh = NULL;
@@ -2105,10 +2247,8 @@ static int ext4_add_entry(handle_t *handle, struct dentry *dentry,
 	de->inode = 0;
 	de->rec_len = ext4_rec_len_to_disk(blocksize - csum_size, blocksize);
 
-	if (csum_size) {
-		t = EXT4_DIRENT_TAIL(bh->b_data, blocksize);
-		initialize_dirent_tail(t, blocksize);
-	}
+	if (csum_size)
+		ext4_initialize_dirent_tail(bh, blocksize);
 
 	retval = add_dirent_to_buf(handle, &fname, dir, inode, de, bh);
 out:
@@ -2140,7 +2280,7 @@ again:
 		return PTR_ERR(frame);
 	entries = frame->entries;
 	at = frame->at;
-	bh = ext4_read_dirblock(dir, dx_get_block(frame->at), DIRENT);
+	bh = ext4_read_dirblock(dir, dx_get_block(frame->at), DIRENT_HTREE);
 	if (IS_ERR(bh)) {
 		err = PTR_ERR(bh);
 		bh = NULL;
@@ -2366,7 +2506,7 @@ static int ext4_delete_entry(handle_t *handle,
 		goto out;
 
 	BUFFER_TRACE(bh, "call ext4_handle_dirty_metadata");
-	err = ext4_handle_dirty_dirent_node(handle, dir, bh);
+	err = ext4_handle_dirty_dirblock(handle, dir, bh);
 	if (unlikely(err))
 		goto out;
 
@@ -2568,7 +2708,6 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
 {
 	struct buffer_head *dir_block = NULL;
 	struct ext4_dir_entry_2 *de;
-	struct ext4_dir_entry_tail *t;
 	ext4_lblk_t block = 0;
 	unsigned int blocksize = dir->i_sb->s_blocksize;
 	int csum_size = 0;
@@ -2592,13 +2731,11 @@ static int ext4_init_new_dir(handle_t *handle, struct inode *dir,
 	de = (struct ext4_dir_entry_2 *)dir_block->b_data;
 	ext4_init_dot_dotdot(inode, de, blocksize, csum_size, dir->i_ino, 0);
 	set_nlink(inode, 2);
-	if (csum_size) {
-		t = EXT4_DIRENT_TAIL(dir_block->b_data, blocksize);
-		initialize_dirent_tail(t, blocksize);
-	}
+	if (csum_size)
+		ext4_initialize_dirent_tail(dir_block, blocksize);
 
 	BUFFER_TRACE(dir_block, "call ext4_handle_dirty_metadata");
-	err = ext4_handle_dirty_dirent_node(handle, inode, dir_block);
+	err = ext4_handle_dirty_dirblock(handle, inode, dir_block);
 	if (err)
 		goto out;
 	set_buffer_verified(dir_block);
@@ -2688,7 +2825,10 @@ bool ext4_empty_dir(struct inode *inode)
 		EXT4_ERROR_INODE(inode, "invalid size");
 		return true;
 	}
-	bh = ext4_read_dirblock(inode, 0, EITHER);
+	/* The first directory block must not be a hole,
+	 * so treat it as DIRENT_HTREE
+	 */
+	bh = ext4_read_dirblock(inode, 0, DIRENT_HTREE);
 	if (IS_ERR(bh))
 		return true;
 
@@ -2710,6 +2850,10 @@ bool ext4_empty_dir(struct inode *inode)
 			brelse(bh);
 			lblock = offset >> EXT4_BLOCK_SIZE_BITS(sb);
 			bh = ext4_read_dirblock(inode, lblock, EITHER);
+			if (bh == NULL) {
+				offset += sb->s_blocksize;
+				continue;
+			}
 			if (IS_ERR(bh))
 				return true;
 			de = (struct ext4_dir_entry_2 *) bh->b_data;
@@ -2975,6 +3119,17 @@ static int ext4_rmdir(struct inode *dir, struct dentry *dentry)
 	ext4_update_dx_flag(dir);
 	ext4_mark_inode_dirty(handle, dir);
 
+#ifdef CONFIG_UNICODE
+	/* VFS negative dentries are incompatible with Encoding and
+	 * Case-insensitiveness. Eventually we'll want avoid
+	 * invalidating the dentries here, alongside with returning the
+	 * negative dentries at ext4_lookup(), when it is better
+	 * supported by the VFS for the CI case.
+	 */
+	if (IS_CASEFOLDED(dir))
+		d_invalidate(dentry);
+#endif
+
 end_rmdir:
 	brelse(bh);
 	if (handle)
@@ -3044,6 +3199,17 @@ static int ext4_unlink(struct inode *dir, struct dentry *dentry)
 	inode->i_ctime = current_time(inode);
 	ext4_mark_inode_dirty(handle, inode);
 
+#ifdef CONFIG_UNICODE
+	/* VFS negative dentries are incompatible with Encoding and
+	 * Case-insensitiveness. Eventually we'll want avoid
+	 * invalidating the dentries here, alongside with returning the
+	 * negative dentries at ext4_lookup(), when it is  better
+	 * supported by the VFS for the CI case.
+	 */
+	if (IS_CASEFOLDED(dir))
+		d_invalidate(dentry);
+#endif
+
 end_unlink:
 	brelse(bh);
 	if (handle)
@@ -3253,7 +3419,10 @@ static struct buffer_head *ext4_get_first_dir_block(handle_t *handle,
 	struct buffer_head *bh;
 
 	if (!ext4_has_inline_data(inode)) {
-		bh = ext4_read_dirblock(inode, 0, EITHER);
+		/* The first directory block must not be a hole, so
+		 * treat it as DIRENT_HTREE
+		 */
+		bh = ext4_read_dirblock(inode, 0, DIRENT_HTREE);
 		if (IS_ERR(bh)) {
 			*retval = PTR_ERR(bh);
 			return NULL;
@@ -3314,9 +3483,8 @@ static int ext4_rename_dir_finish(handle_t *handle, struct ext4_renament *ent,
 							   ent->inode,
 							   ent->dir_bh);
 		} else {
-			retval = ext4_handle_dirty_dirent_node(handle,
-							       ent->inode,
-							       ent->dir_bh);
+			retval = ext4_handle_dirty_dirblock(handle, ent->inode,
+							    ent->dir_bh);
 		}
 	} else {
 		retval = ext4_mark_inode_dirty(handle, ent->inode);
@@ -3346,8 +3514,7 @@ static int ext4_setent(handle_t *handle, struct ext4_renament *ent,
 	ext4_mark_inode_dirty(handle, ent->dir);
 	BUFFER_TRACE(ent->bh, "call ext4_handle_dirty_metadata");
 	if (!ent->inlined) {
-		retval = ext4_handle_dirty_dirent_node(handle,
-						       ent->dir, ent->bh);
+		retval = ext4_handle_dirty_dirblock(handle, ent->dir, ent->bh);
 		if (unlikely(retval)) {
 			ext4_std_error(ent->dir->i_sb, retval);
 			return retval;
diff --git a/fs/ext4/page-io.c b/fs/ext4/page-io.c
index 2aa62d58d8dd..a18a47a2a1d1 100644
--- a/fs/ext4/page-io.c
+++ b/fs/ext4/page-io.c
@@ -61,14 +61,12 @@ static void buffer_io_error(struct buffer_head *bh)
 
 static void ext4_finish_bio(struct bio *bio)
 {
-	int i;
 	struct bio_vec *bvec;
+	struct bvec_iter_all iter_all;
 
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 		struct page *page = bvec->bv_page;
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
-		struct page *data_page = NULL;
-#endif
+		struct page *bounce_page = NULL;
 		struct buffer_head *bh, *head;
 		unsigned bio_start = bvec->bv_offset;
 		unsigned bio_end = bio_start + bvec->bv_len;
@@ -78,13 +76,10 @@ static void ext4_finish_bio(struct bio *bio)
 		if (!page)
 			continue;
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
-		if (!page->mapping) {
-			/* The bounce data pages are unmapped. */
-			data_page = page;
-			fscrypt_pullback_bio_page(&page, false);
+		if (fscrypt_is_bounce_page(page)) {
+			bounce_page = page;
+			page = fscrypt_pagecache_page(bounce_page);
 		}
-#endif
 
 		if (bio->bi_status) {
 			SetPageError(page);
@@ -111,10 +106,7 @@ static void ext4_finish_bio(struct bio *bio)
 		bit_spin_unlock(BH_Uptodate_Lock, &head->b_state);
 		local_irq_restore(flags);
 		if (!under_io) {
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
-			if (data_page)
-				fscrypt_restore_control_page(data_page);
-#endif
+			fscrypt_free_bounce_page(bounce_page);
 			end_page_writeback(page);
 		}
 	}
@@ -415,7 +407,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
 			struct writeback_control *wbc,
 			bool keep_towrite)
 {
-	struct page *data_page = NULL;
+	struct page *bounce_page = NULL;
 	struct inode *inode = page->mapping->host;
 	unsigned block_start;
 	struct buffer_head *bh, *head;
@@ -467,25 +459,30 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
 				ext4_io_submit(io);
 			continue;
 		}
-		if (buffer_new(bh)) {
+		if (buffer_new(bh))
 			clear_buffer_new(bh);
-			clean_bdev_bh_alias(bh);
-		}
 		set_buffer_async_write(bh);
 		nr_to_submit++;
 	} while ((bh = bh->b_this_page) != head);
 
 	bh = head = page_buffers(page);
 
-	if (ext4_encrypted_inode(inode) && S_ISREG(inode->i_mode) &&
-	    nr_to_submit) {
+	/*
+	 * If any blocks are being written to an encrypted file, encrypt them
+	 * into a bounce page.  For simplicity, just encrypt until the last
+	 * block which might be needed.  This may cause some unneeded blocks
+	 * (e.g. holes) to be unnecessarily encrypted, but this is rare and
+	 * can't happen in the common case of blocksize == PAGE_SIZE.
+	 */
+	if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode) && nr_to_submit) {
 		gfp_t gfp_flags = GFP_NOFS;
+		unsigned int enc_bytes = round_up(len, i_blocksize(inode));
 
 	retry_encrypt:
-		data_page = fscrypt_encrypt_page(inode, page, PAGE_SIZE, 0,
-						page->index, gfp_flags);
-		if (IS_ERR(data_page)) {
-			ret = PTR_ERR(data_page);
+		bounce_page = fscrypt_encrypt_pagecache_blocks(page, enc_bytes,
+							       0, gfp_flags);
+		if (IS_ERR(bounce_page)) {
+			ret = PTR_ERR(bounce_page);
 			if (ret == -ENOMEM && wbc->sync_mode == WB_SYNC_ALL) {
 				if (io->io_bio) {
 					ext4_io_submit(io);
@@ -494,7 +491,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
 				gfp_flags |= __GFP_NOFAIL;
 				goto retry_encrypt;
 			}
-			data_page = NULL;
+			bounce_page = NULL;
 			goto out;
 		}
 	}
@@ -503,8 +500,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
 	do {
 		if (!buffer_async_write(bh))
 			continue;
-		ret = io_submit_add_bh(io, inode,
-				       data_page ? data_page : page, bh);
+		ret = io_submit_add_bh(io, inode, bounce_page ?: page, bh);
 		if (ret) {
 			/*
 			 * We only get here on ENOMEM.  Not much else
@@ -520,8 +516,7 @@ int ext4_bio_write_page(struct ext4_io_submit *io,
 	/* Error stopped previous loop? Clean up buffers... */
 	if (ret) {
 	out:
-		if (data_page)
-			fscrypt_restore_control_page(data_page);
+		fscrypt_free_bounce_page(bounce_page);
 		printk_ratelimited(KERN_ERR "%s: ret = %d\n", __func__, ret);
 		redirty_page_for_writepage(wbc, page);
 		do {
diff --git a/fs/ext4/readpage.c b/fs/ext4/readpage.c
index 6aa282ee455a..c916017db334 100644
--- a/fs/ext4/readpage.c
+++ b/fs/ext4/readpage.c
@@ -49,7 +49,7 @@
 
 static inline bool ext4_bio_encrypted(struct bio *bio)
 {
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	return unlikely(bio->bi_private != NULL);
 #else
 	return false;
@@ -71,7 +71,7 @@ static inline bool ext4_bio_encrypted(struct bio *bio)
 static void mpage_end_io(struct bio *bio)
 {
 	struct bio_vec *bv;
-	int i;
+	struct bvec_iter_all iter_all;
 
 	if (ext4_bio_encrypted(bio)) {
 		if (bio->bi_status) {
@@ -81,7 +81,7 @@ static void mpage_end_io(struct bio *bio)
 			return;
 		}
 	}
-	bio_for_each_segment_all(bv, bio, i) {
+	bio_for_each_segment_all(bv, bio, iter_all) {
 		struct page *page = bv->bv_page;
 
 		if (!bio->bi_status) {
@@ -126,9 +126,10 @@ int ext4_mpage_readpages(struct address_space *mapping,
 		int fully_mapped = 1;
 		unsigned first_hole = blocks_per_page;
 
-		prefetchw(&page->flags);
 		if (pages) {
 			page = lru_to_page(pages);
+
+			prefetchw(&page->flags);
 			list_del(&page->lru);
 			if (add_to_page_cache_lru(page, mapping, page->index,
 				  readahead_gfp_mask(mapping)))
@@ -242,9 +243,8 @@ int ext4_mpage_readpages(struct address_space *mapping,
 		if (bio == NULL) {
 			struct fscrypt_ctx *ctx = NULL;
 
-			if (ext4_encrypted_inode(inode) &&
-			    S_ISREG(inode->i_mode)) {
-				ctx = fscrypt_get_ctx(inode, GFP_NOFS);
+			if (IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode)) {
+				ctx = fscrypt_get_ctx(GFP_NOFS);
 				if (IS_ERR(ctx))
 					goto set_error_page;
 			}
diff --git a/fs/ext4/resize.c b/fs/ext4/resize.c
index 48421de803b7..c0e9aef376a7 100644
--- a/fs/ext4/resize.c
+++ b/fs/ext4/resize.c
@@ -874,6 +874,7 @@ static int add_new_gdb(handle_t *handle, struct inode *inode,
 	err = ext4_handle_dirty_metadata(handle, NULL, gdb_bh);
 	if (unlikely(err)) {
 		ext4_std_error(sb, err);
+		iloc.bh = NULL;
 		goto errout;
 	}
 	brelse(dind);
@@ -932,11 +933,18 @@ static int add_new_gdb_meta_bg(struct super_block *sb,
 	memcpy(n_group_desc, o_group_desc,
 	       EXT4_SB(sb)->s_gdb_count * sizeof(struct buffer_head *));
 	n_group_desc[gdb_num] = gdb_bh;
+
+	BUFFER_TRACE(gdb_bh, "get_write_access");
+	err = ext4_journal_get_write_access(handle, gdb_bh);
+	if (err) {
+		kvfree(n_group_desc);
+		brelse(gdb_bh);
+		return err;
+	}
+
 	EXT4_SB(sb)->s_group_desc = n_group_desc;
 	EXT4_SB(sb)->s_gdb_count++;
 	kvfree(o_group_desc);
-	BUFFER_TRACE(gdb_bh, "get_write_access");
-	err = ext4_journal_get_write_access(handle, gdb_bh);
 	return err;
 }
 
@@ -1753,8 +1761,6 @@ int ext4_group_extend(struct super_block *sb, struct ext4_super_block *es,
 		ext4_msg(sb, KERN_ERR,
 			 "filesystem too large to resize to %llu blocks safely",
 			 n_blocks_count);
-		if (sizeof(sector_t) < 8)
-			ext4_warning(sb, "CONFIG_LBDAF not enabled");
 		return -EINVAL;
 	}
 
@@ -1960,7 +1966,8 @@ retry:
 				le16_to_cpu(es->s_reserved_gdt_blocks);
 			n_group = n_desc_blocks * EXT4_DESC_PER_BLOCK(sb);
 			n_blocks_count = (ext4_fsblk_t)n_group *
-				EXT4_BLOCKS_PER_GROUP(sb);
+				EXT4_BLOCKS_PER_GROUP(sb) +
+				le32_to_cpu(es->s_first_data_block);
 			n_group--; /* set to last group number */
 		}
 
@@ -2072,6 +2079,10 @@ out:
 		free_flex_gd(flex_gd);
 	if (resize_inode != NULL)
 		iput(resize_inode);
-	ext4_msg(sb, KERN_INFO, "resized filesystem to %llu", n_blocks_count);
+	if (err)
+		ext4_warning(sb, "error (%d) occurred during "
+			     "file system resize", err);
+	ext4_msg(sb, KERN_INFO, "resized filesystem to %llu",
+		 ext4_blocks_count(es));
 	return err;
 }
diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index fb12d3c17c1b..4079605d437a 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -42,6 +42,7 @@
 #include <linux/cleancache.h>
 #include <linux/uaccess.h>
 #include <linux/iversion.h>
+#include <linux/unicode.h>
 
 #include <linux/kthread.h>
 #include <linux/freezer.h>
@@ -430,6 +431,12 @@ static void ext4_journal_commit_callback(journal_t *journal, transaction_t *txn)
 	spin_unlock(&sbi->s_md_lock);
 }
 
+static bool system_going_down(void)
+{
+	return system_state == SYSTEM_HALT || system_state == SYSTEM_POWER_OFF
+		|| system_state == SYSTEM_RESTART;
+}
+
 /* Deal with the reporting of failure conditions on a filesystem such as
  * inconsistencies detected or read IO failures.
  *
@@ -460,7 +467,12 @@ static void ext4_handle_error(struct super_block *sb)
 		if (journal)
 			jbd2_journal_abort(journal, -EIO);
 	}
-	if (test_opt(sb, ERRORS_RO)) {
+	/*
+	 * We force ERRORS_RO behavior when system is rebooting. Otherwise we
+	 * could panic during 'reboot -f' as the underlying device got already
+	 * disabled.
+	 */
+	if (test_opt(sb, ERRORS_RO) || system_going_down()) {
 		ext4_msg(sb, KERN_CRIT, "Remounting filesystem read-only");
 		/*
 		 * Make sure updated value of ->s_mount_flags will be visible
@@ -468,8 +480,7 @@ static void ext4_handle_error(struct super_block *sb)
 		 */
 		smp_wmb();
 		sb->s_flags |= SB_RDONLY;
-	}
-	if (test_opt(sb, ERRORS_PANIC)) {
+	} else if (test_opt(sb, ERRORS_PANIC)) {
 		if (EXT4_SB(sb)->s_journal &&
 		  !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR))
 			return;
@@ -688,7 +699,7 @@ void __ext4_abort(struct super_block *sb, const char *function,
 			jbd2_journal_abort(EXT4_SB(sb)->s_journal, -EIO);
 		save_error_info(sb, function, line);
 	}
-	if (test_opt(sb, ERRORS_PANIC)) {
+	if (test_opt(sb, ERRORS_PANIC) && !system_going_down()) {
 		if (EXT4_SB(sb)->s_journal &&
 		  !(EXT4_SB(sb)->s_journal->j_flags & JBD2_REC_ERR))
 			return;
@@ -1044,6 +1055,9 @@ static void ext4_put_super(struct super_block *sb)
 		crypto_free_shash(sbi->s_chksum_driver);
 	kfree(sbi->s_blockgroup_lock);
 	fs_put_dax(sbi->s_daxdev);
+#ifdef CONFIG_UNICODE
+	utf8_unload(sbi->s_encoding);
+#endif
 	kfree(sbi);
 }
 
@@ -1097,9 +1111,9 @@ static int ext4_drop_inode(struct inode *inode)
 	return drop;
 }
 
-static void ext4_i_callback(struct rcu_head *head)
+static void ext4_free_in_core_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
+	fscrypt_free_inode(inode);
 	kmem_cache_free(ext4_inode_cachep, EXT4_I(inode));
 }
 
@@ -1114,7 +1128,6 @@ static void ext4_destroy_inode(struct inode *inode)
 				true);
 		dump_stack();
 	}
-	call_rcu(&inode->i_rcu, ext4_i_callback);
 }
 
 static void init_once(void *foo)
@@ -1232,7 +1245,7 @@ static int bdev_try_to_free_page(struct super_block *sb, struct page *page,
 	return try_to_free_buffers(page);
 }
 
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 static int ext4_get_context(struct inode *inode, void *ctx, size_t len)
 {
 	return ext4_xattr_get(inode, EXT4_XATTR_INDEX_ENCRYPTION,
@@ -1392,6 +1405,7 @@ static const struct quotactl_ops ext4_qctl_operations = {
 
 static const struct super_operations ext4_sops = {
 	.alloc_inode	= ext4_alloc_inode,
+	.free_inode	= ext4_free_in_core_inode,
 	.destroy_inode	= ext4_destroy_inode,
 	.write_inode	= ext4_write_inode,
 	.dirty_inode	= ext4_dirty_inode,
@@ -1740,6 +1754,36 @@ static const struct mount_opts {
 	{Opt_err, 0, 0}
 };
 
+#ifdef CONFIG_UNICODE
+static const struct ext4_sb_encodings {
+	__u16 magic;
+	char *name;
+	char *version;
+} ext4_sb_encoding_map[] = {
+	{EXT4_ENC_UTF8_12_1, "utf8", "12.1.0"},
+};
+
+static int ext4_sb_read_encoding(const struct ext4_super_block *es,
+				 const struct ext4_sb_encodings **encoding,
+				 __u16 *flags)
+{
+	__u16 magic = le16_to_cpu(es->s_encoding);
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(ext4_sb_encoding_map); i++)
+		if (magic == ext4_sb_encoding_map[i].magic)
+			break;
+
+	if (i >= ARRAY_SIZE(ext4_sb_encoding_map))
+		return -EINVAL;
+
+	*encoding = &ext4_sb_encoding_map[i];
+	*flags = le16_to_cpu(es->s_encoding_flags);
+
+	return 0;
+}
+#endif
+
 static int handle_mount_opt(struct super_block *sb, char *opt, int token,
 			    substring_t *args, unsigned long *journal_devnum,
 			    unsigned int *journal_ioprio, int is_remount)
@@ -1922,7 +1966,7 @@ static int handle_mount_opt(struct super_block *sb, char *opt, int token,
 		*journal_ioprio =
 			IOPRIO_PRIO_VALUE(IOPRIO_CLASS_BE, arg);
 	} else if (token == Opt_test_dummy_encryption) {
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 		sbi->s_mount_flags |= EXT4_MF_TEST_DUMMY_ENCRYPTION;
 		ext4_msg(sb, KERN_WARNING,
 			 "Test dummy encryption mode enabled");
@@ -2249,7 +2293,6 @@ static int ext4_setup_super(struct super_block *sb, struct ext4_super_block *es,
 		es->s_max_mnt_count = cpu_to_le16(EXT4_DFL_MAX_MNT_COUNT);
 	le16_add_cpu(&es->s_mnt_count, 1);
 	ext4_update_tstamp(es, s_mtime);
-	ext4_update_dynamic_rev(sb);
 	if (sbi->s_journal)
 		ext4_set_feature_journal_needs_recovery(sb);
 
@@ -2697,13 +2740,9 @@ static loff_t ext4_max_size(int blkbits, int has_huge_files)
 	loff_t res;
 	loff_t upper_limit = MAX_LFS_FILESIZE;
 
-	/* small i_blocks in vfs inode? */
-	if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) {
-		/*
-		 * CONFIG_LBDAF is not enabled implies the inode
-		 * i_block represent total blocks in 512 bytes
-		 * 32 == size of vfs inode i_blocks * 8
-		 */
+	BUILD_BUG_ON(sizeof(blkcnt_t) < sizeof(u64));
+
+	if (!has_huge_files) {
 		upper_limit = (1LL << 32) - 1;
 
 		/* total blocks in file system block size */
@@ -2744,11 +2783,11 @@ static loff_t ext4_max_bitmap_size(int bits, int has_huge_files)
 	 * number of 512-byte sectors of the file.
 	 */
 
-	if (!has_huge_files || sizeof(blkcnt_t) < sizeof(u64)) {
+	if (!has_huge_files) {
 		/*
-		 * !has_huge_files or CONFIG_LBDAF not enabled implies that
-		 * the inode i_block field represents total file blocks in
-		 * 2^32 512-byte sectors == size of vfs inode i_blocks * 8
+		 * !has_huge_files or implies that the inode i_block field
+		 * represents total file blocks in 2^32 512-byte sectors ==
+		 * size of vfs inode i_blocks * 8
 		 */
 		upper_limit = (1LL << 32) - 1;
 
@@ -2871,6 +2910,15 @@ static int ext4_feature_set_ok(struct super_block *sb, int readonly)
 		return 0;
 	}
 
+#ifndef CONFIG_UNICODE
+	if (ext4_has_feature_casefold(sb)) {
+		ext4_msg(sb, KERN_ERR,
+			 "Filesystem with casefold feature cannot be "
+			 "mounted without CONFIG_UNICODE");
+		return 0;
+	}
+#endif
+
 	if (readonly)
 		return 1;
 
@@ -2888,18 +2936,6 @@ static int ext4_feature_set_ok(struct super_block *sb, int readonly)
 				~EXT4_FEATURE_RO_COMPAT_SUPP));
 		return 0;
 	}
-	/*
-	 * Large file size enabled file system can only be mounted
-	 * read-write on 32-bit systems if kernel is built with CONFIG_LBDAF
-	 */
-	if (ext4_has_feature_huge_file(sb)) {
-		if (sizeof(blkcnt_t) < sizeof(u64)) {
-			ext4_msg(sb, KERN_ERR, "Filesystem with huge files "
-				 "cannot be mounted RDWR without "
-				 "CONFIG_LBDAF");
-			return 0;
-		}
-	}
 	if (ext4_has_feature_bigalloc(sb) && !ext4_has_feature_extents(sb)) {
 		ext4_msg(sb, KERN_ERR,
 			 "Can't support bigalloc feature without "
@@ -3504,6 +3540,37 @@ int ext4_calculate_overhead(struct super_block *sb)
 	return 0;
 }
 
+static void ext4_clamp_want_extra_isize(struct super_block *sb)
+{
+	struct ext4_sb_info *sbi = EXT4_SB(sb);
+	struct ext4_super_block *es = sbi->s_es;
+
+	/* determine the minimum size of new large inodes, if present */
+	if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE &&
+	    sbi->s_want_extra_isize == 0) {
+		sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
+						     EXT4_GOOD_OLD_INODE_SIZE;
+		if (ext4_has_feature_extra_isize(sb)) {
+			if (sbi->s_want_extra_isize <
+			    le16_to_cpu(es->s_want_extra_isize))
+				sbi->s_want_extra_isize =
+					le16_to_cpu(es->s_want_extra_isize);
+			if (sbi->s_want_extra_isize <
+			    le16_to_cpu(es->s_min_extra_isize))
+				sbi->s_want_extra_isize =
+					le16_to_cpu(es->s_min_extra_isize);
+		}
+	}
+	/* Check if enough inode space is available */
+	if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize >
+							sbi->s_inode_size) {
+		sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
+						       EXT4_GOOD_OLD_INODE_SIZE;
+		ext4_msg(sb, KERN_INFO,
+			 "required extra inode space not available");
+	}
+}
+
 static void ext4_set_resv_clusters(struct super_block *sb)
 {
 	ext4_fsblk_t resv_clusters;
@@ -3730,6 +3797,43 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 			   &journal_ioprio, 0))
 		goto failed_mount;
 
+#ifdef CONFIG_UNICODE
+	if (ext4_has_feature_casefold(sb) && !sbi->s_encoding) {
+		const struct ext4_sb_encodings *encoding_info;
+		struct unicode_map *encoding;
+		__u16 encoding_flags;
+
+		if (ext4_has_feature_encrypt(sb)) {
+			ext4_msg(sb, KERN_ERR,
+				 "Can't mount with encoding and encryption");
+			goto failed_mount;
+		}
+
+		if (ext4_sb_read_encoding(es, &encoding_info,
+					  &encoding_flags)) {
+			ext4_msg(sb, KERN_ERR,
+				 "Encoding requested by superblock is unknown");
+			goto failed_mount;
+		}
+
+		encoding = utf8_load(encoding_info->version);
+		if (IS_ERR(encoding)) {
+			ext4_msg(sb, KERN_ERR,
+				 "can't mount with superblock charset: %s-%s "
+				 "not supported by the kernel. flags: 0x%x.",
+				 encoding_info->name, encoding_info->version,
+				 encoding_flags);
+			goto failed_mount;
+		}
+		ext4_msg(sb, KERN_INFO,"Using encoding defined by superblock: "
+			 "%s-%s with flags 0x%hx", encoding_info->name,
+			 encoding_info->version?:"\b", encoding_flags);
+
+		sbi->s_encoding = encoding;
+		sbi->s_encoding_flags = encoding_flags;
+	}
+#endif
+
 	if (test_opt(sb, DATA_FLAGS) == EXT4_MOUNT_JOURNAL_DATA) {
 		printk_once(KERN_WARNING "EXT4-fs: Warning: mounting "
 			    "with data=journal disables delayed "
@@ -4048,8 +4152,6 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	if (err) {
 		ext4_msg(sb, KERN_ERR, "filesystem"
 			 " too large to mount safely on this system");
-		if (sizeof(sector_t) < 8)
-			ext4_msg(sb, KERN_WARNING, "CONFIG_LBDAF not enabled");
 		goto failed_mount;
 	}
 
@@ -4167,7 +4269,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 	sb->s_op = &ext4_sops;
 	sb->s_export_op = &ext4_export_ops;
 	sb->s_xattr = ext4_xattr_handlers;
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	sb->s_cop = &ext4_cryptops;
 #endif
 #ifdef CONFIG_QUOTA
@@ -4229,7 +4331,7 @@ static int ext4_fill_super(struct super_block *sb, void *data, int silent)
 				 "data=, fs mounted w/o journal");
 			goto failed_mount_wq;
 		}
-		sbi->s_def_mount_opt &= EXT4_MOUNT_JOURNAL_CHECKSUM;
+		sbi->s_def_mount_opt &= ~EXT4_MOUNT_JOURNAL_CHECKSUM;
 		clear_opt(sb, JOURNAL_CHECKSUM);
 		clear_opt(sb, DATA_FLAGS);
 		sbi->s_journal = NULL;
@@ -4364,6 +4466,12 @@ no_journal:
 		iput(root);
 		goto failed_mount4;
 	}
+
+#ifdef CONFIG_UNICODE
+	if (sbi->s_encoding)
+		sb->s_d_op = &ext4_dentry_ops;
+#endif
+
 	sb->s_root = d_make_root(root);
 	if (!sb->s_root) {
 		ext4_msg(sb, KERN_ERR, "get root dentry failed");
@@ -4378,30 +4486,7 @@ no_journal:
 	} else if (ret)
 		goto failed_mount4a;
 
-	/* determine the minimum size of new large inodes, if present */
-	if (sbi->s_inode_size > EXT4_GOOD_OLD_INODE_SIZE &&
-	    sbi->s_want_extra_isize == 0) {
-		sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
-						     EXT4_GOOD_OLD_INODE_SIZE;
-		if (ext4_has_feature_extra_isize(sb)) {
-			if (sbi->s_want_extra_isize <
-			    le16_to_cpu(es->s_want_extra_isize))
-				sbi->s_want_extra_isize =
-					le16_to_cpu(es->s_want_extra_isize);
-			if (sbi->s_want_extra_isize <
-			    le16_to_cpu(es->s_min_extra_isize))
-				sbi->s_want_extra_isize =
-					le16_to_cpu(es->s_min_extra_isize);
-		}
-	}
-	/* Check if enough inode space is available */
-	if (EXT4_GOOD_OLD_INODE_SIZE + sbi->s_want_extra_isize >
-							sbi->s_inode_size) {
-		sbi->s_want_extra_isize = sizeof(struct ext4_inode) -
-						       EXT4_GOOD_OLD_INODE_SIZE;
-		ext4_msg(sb, KERN_INFO, "required extra inode space not"
-			 "available");
-	}
+	ext4_clamp_want_extra_isize(sb);
 
 	ext4_set_resv_clusters(sb);
 
@@ -4569,9 +4654,14 @@ failed_mount2:
 failed_mount:
 	if (sbi->s_chksum_driver)
 		crypto_free_shash(sbi->s_chksum_driver);
+
+#ifdef CONFIG_UNICODE
+	utf8_unload(sbi->s_encoding);
+#endif
+
 #ifdef CONFIG_QUOTA
 	for (i = 0; i < EXT4_MAXQUOTAS; i++)
-		kfree(sbi->s_qf_names[i]);
+		kfree(get_qf_name(sb, sbi, i));
 #endif
 	ext4_blkdev_remove(sbi);
 	brelse(bh);
@@ -5185,6 +5275,8 @@ static int ext4_remount(struct super_block *sb, int *flags, char *data)
 		goto restore_opts;
 	}
 
+	ext4_clamp_want_extra_isize(sb);
+
 	if ((old_opts.s_mount_opt & EXT4_MOUNT_JOURNAL_CHECKSUM) ^
 	    test_opt(sb, JOURNAL_CHECKSUM)) {
 		ext4_msg(sb, KERN_ERR, "changing journal_checksum "
diff --git a/fs/ext4/sysfs.c b/fs/ext4/sysfs.c
index 9212a026a1f1..b3cd7655a6ff 100644
--- a/fs/ext4/sysfs.c
+++ b/fs/ext4/sysfs.c
@@ -30,6 +30,7 @@ typedef enum {
 	attr_feature,
 	attr_pointer_ui,
 	attr_pointer_atomic,
+	attr_journal_task,
 } attr_id_t;
 
 typedef enum {
@@ -125,6 +126,14 @@ static ssize_t trigger_test_error(struct ext4_sb_info *sbi,
 	return count;
 }
 
+static ssize_t journal_task_show(struct ext4_sb_info *sbi, char *buf)
+{
+	if (!sbi->s_journal)
+		return snprintf(buf, PAGE_SIZE, "<none>\n");
+	return snprintf(buf, PAGE_SIZE, "%d\n",
+			task_pid_vnr(sbi->s_journal->j_task));
+}
+
 #define EXT4_ATTR(_name,_mode,_id)					\
 static struct ext4_attr ext4_attr_##_name = {				\
 	.attr = {.name = __stringify(_name), .mode = _mode },		\
@@ -188,6 +197,7 @@ EXT4_RW_ATTR_SBI_UI(msg_ratelimit_burst, s_msg_ratelimit_state.burst);
 EXT4_RO_ATTR_ES_UI(errors_count, s_error_count);
 EXT4_ATTR(first_error_time, 0444, first_error_time);
 EXT4_ATTR(last_error_time, 0444, last_error_time);
+EXT4_ATTR(journal_task, 0444, journal_task);
 
 static unsigned int old_bump_val = 128;
 EXT4_ATTR_PTR(max_writeback_mb_bump, 0444, pointer_ui, &old_bump_val);
@@ -217,28 +227,37 @@ static struct attribute *ext4_attrs[] = {
 	ATTR_LIST(errors_count),
 	ATTR_LIST(first_error_time),
 	ATTR_LIST(last_error_time),
+	ATTR_LIST(journal_task),
 	NULL,
 };
+ATTRIBUTE_GROUPS(ext4);
 
 /* Features this copy of ext4 supports */
 EXT4_ATTR_FEATURE(lazy_itable_init);
 EXT4_ATTR_FEATURE(batched_discard);
 EXT4_ATTR_FEATURE(meta_bg_resize);
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 EXT4_ATTR_FEATURE(encryption);
 #endif
+#ifdef CONFIG_UNICODE
+EXT4_ATTR_FEATURE(casefold);
+#endif
 EXT4_ATTR_FEATURE(metadata_csum_seed);
 
 static struct attribute *ext4_feat_attrs[] = {
 	ATTR_LIST(lazy_itable_init),
 	ATTR_LIST(batched_discard),
 	ATTR_LIST(meta_bg_resize),
-#ifdef CONFIG_EXT4_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	ATTR_LIST(encryption),
 #endif
+#ifdef CONFIG_UNICODE
+	ATTR_LIST(casefold),
+#endif
 	ATTR_LIST(metadata_csum_seed),
 	NULL,
 };
+ATTRIBUTE_GROUPS(ext4_feat);
 
 static void *calc_ptr(struct ext4_attr *a, struct ext4_sb_info *sbi)
 {
@@ -304,6 +323,8 @@ static ssize_t ext4_attr_show(struct kobject *kobj,
 		return print_tstamp(buf, sbi->s_es, s_first_error_time);
 	case attr_last_error_time:
 		return print_tstamp(buf, sbi->s_es, s_last_error_time);
+	case attr_journal_task:
+		return journal_task_show(sbi, buf);
 	}
 
 	return 0;
@@ -355,13 +376,13 @@ static const struct sysfs_ops ext4_attr_ops = {
 };
 
 static struct kobj_type ext4_sb_ktype = {
-	.default_attrs	= ext4_attrs,
+	.default_groups = ext4_groups,
 	.sysfs_ops	= &ext4_attr_ops,
 	.release	= ext4_sb_release,
 };
 
 static struct kobj_type ext4_feat_ktype = {
-	.default_attrs	= ext4_feat_attrs,
+	.default_groups = ext4_feat_groups,
 	.sysfs_ops	= &ext4_attr_ops,
 	.release	= (void (*)(struct kobject *))kfree,
 };
diff --git a/fs/ext4/xattr.c b/fs/ext4/xattr.c
index 86ed9c686249..491f9ee4040e 100644
--- a/fs/ext4/xattr.c
+++ b/fs/ext4/xattr.c
@@ -829,6 +829,7 @@ int ext4_get_inode_usage(struct inode *inode, qsize_t *usage)
 		bh = ext4_sb_bread(inode->i_sb, EXT4_I(inode)->i_file_acl, REQ_PRIO);
 		if (IS_ERR(bh)) {
 			ret = PTR_ERR(bh);
+			bh = NULL;
 			goto out;
 		}
 
@@ -1695,7 +1696,7 @@ static int ext4_xattr_set_entry(struct ext4_xattr_info *i,
 
 	/* No failures allowed past this point. */
 
-	if (!s->not_found && here->e_value_size && here->e_value_offs) {
+	if (!s->not_found && here->e_value_size && !here->e_value_inum) {
 		/* Remove the old value. */
 		void *first_val = s->base + min_offs;
 		size_t offs = le16_to_cpu(here->e_value_offs);
@@ -2903,6 +2904,7 @@ int ext4_xattr_delete_inode(handle_t *handle, struct inode *inode,
 			if (error == -EIO)
 				EXT4_ERROR_INODE(inode, "block %llu read error",
 						 EXT4_I(inode)->i_file_acl);
+			bh = NULL;
 			goto cleanup;
 		}
 		error = ext4_xattr_check_block(inode, bh);
@@ -3059,6 +3061,7 @@ ext4_xattr_block_cache_find(struct inode *inode,
 		if (IS_ERR(bh)) {
 			if (PTR_ERR(bh) == -ENOMEM)
 				return NULL;
+			bh = NULL;
 			EXT4_ERROR_INODE(inode, "block %lu read error",
 					 (unsigned long)ce->e_value);
 		} else if (ext4_xattr_cmp(header, BHDR(bh)) == 0) {
diff --git a/fs/f2fs/Kconfig b/fs/f2fs/Kconfig
index 9a20ef42fadd..110a38ca5d53 100644
--- a/fs/f2fs/Kconfig
+++ b/fs/f2fs/Kconfig
@@ -1,8 +1,10 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config F2FS_FS
 	tristate "F2FS filesystem support"
 	depends on BLOCK
 	select CRYPTO
 	select CRYPTO_CRC32
+	select F2FS_FS_XATTR if FS_ENCRYPTION
 	help
 	  F2FS is based on Log-structured File System (LFS), which supports
 	  versatile "flash-friendly" features. The design has been focused on
@@ -70,17 +72,6 @@ config F2FS_CHECK_FS
 
 	  If you want to improve the performance, say N.
 
-config F2FS_FS_ENCRYPTION
-	bool "F2FS Encryption"
-	depends on F2FS_FS
-	depends on F2FS_FS_XATTR
-	select FS_ENCRYPTION
-	help
-	  Enable encryption of f2fs files and directories.  This
-	  feature is similar to ecryptfs, but it is more memory
-	  efficient since it avoids caching the encrypted and
-	  decrypted pages in the page cache.
-
 config F2FS_IO_TRACE
 	bool "F2FS IO tracer"
 	depends on F2FS_FS
diff --git a/fs/f2fs/acl.c b/fs/f2fs/acl.c
index 63e599524085..217b290ae3a5 100644
--- a/fs/f2fs/acl.c
+++ b/fs/f2fs/acl.c
@@ -285,7 +285,7 @@ static int f2fs_acl_create_masq(struct posix_acl *acl, umode_t *mode_p)
 	/* assert(atomic_read(acl->a_refcount) == 1); */
 
 	FOREACH_ACL_ENTRY(pa, acl, pe) {
-		switch(pa->e_tag) {
+		switch (pa->e_tag) {
 		case ACL_USER_OBJ:
 			pa->e_perm &= (mode >> 6) | ~S_IRWXO;
 			mode &= (pa->e_perm << 6) | ~S_IRWXU;
@@ -326,7 +326,7 @@ static int f2fs_acl_create_masq(struct posix_acl *acl, umode_t *mode_p)
 	}
 
 	*mode_p = (*mode_p & ~S_IRWXUGO) | mode;
-        return not_equiv;
+	return not_equiv;
 }
 
 static int f2fs_acl_create(struct inode *dir, umode_t *mode,
diff --git a/fs/f2fs/checkpoint.c b/fs/f2fs/checkpoint.c
index f955cd3e0677..a0eef95b9e0e 100644
--- a/fs/f2fs/checkpoint.c
+++ b/fs/f2fs/checkpoint.c
@@ -66,7 +66,7 @@ static struct page *__get_meta_page(struct f2fs_sb_info *sbi, pgoff_t index,
 		.old_blkaddr = index,
 		.new_blkaddr = index,
 		.encrypted_page = NULL,
-		.is_meta = is_meta,
+		.is_por = !is_meta,
 	};
 	int err;
 
@@ -130,6 +130,30 @@ struct page *f2fs_get_tmp_page(struct f2fs_sb_info *sbi, pgoff_t index)
 	return __get_meta_page(sbi, index, false);
 }
 
+static bool __is_bitmap_valid(struct f2fs_sb_info *sbi, block_t blkaddr,
+							int type)
+{
+	struct seg_entry *se;
+	unsigned int segno, offset;
+	bool exist;
+
+	if (type != DATA_GENERIC_ENHANCE && type != DATA_GENERIC_ENHANCE_READ)
+		return true;
+
+	segno = GET_SEGNO(sbi, blkaddr);
+	offset = GET_BLKOFF_FROM_SEG0(sbi, blkaddr);
+	se = get_seg_entry(sbi, segno);
+
+	exist = f2fs_test_bit(offset, se->cur_valid_map);
+	if (!exist && type == DATA_GENERIC_ENHANCE) {
+		f2fs_err(sbi, "Inconsistent error blkaddr:%u, sit bitmap:%d",
+			 blkaddr, exist);
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		WARN_ON(1);
+	}
+	return exist;
+}
+
 bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
 					block_t blkaddr, int type)
 {
@@ -151,15 +175,22 @@ bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
 			return false;
 		break;
 	case META_POR:
+		if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
+			blkaddr < MAIN_BLKADDR(sbi)))
+			return false;
+		break;
 	case DATA_GENERIC:
+	case DATA_GENERIC_ENHANCE:
+	case DATA_GENERIC_ENHANCE_READ:
 		if (unlikely(blkaddr >= MAX_BLKADDR(sbi) ||
-			blkaddr < MAIN_BLKADDR(sbi))) {
-			if (type == DATA_GENERIC) {
-				f2fs_msg(sbi->sb, KERN_WARNING,
-					"access invalid blkaddr:%u", blkaddr);
-				WARN_ON(1);
-			}
+				blkaddr < MAIN_BLKADDR(sbi))) {
+			f2fs_warn(sbi, "access invalid blkaddr:%u",
+				  blkaddr);
+			set_sbi_flag(sbi, SBI_NEED_FSCK);
+			WARN_ON(1);
 			return false;
+		} else {
+			return __is_bitmap_valid(sbi, blkaddr, type);
 		}
 		break;
 	case META_GENERIC:
@@ -189,7 +220,7 @@ int f2fs_ra_meta_pages(struct f2fs_sb_info *sbi, block_t start, int nrpages,
 		.op_flags = sync ? (REQ_META | REQ_PRIO) : REQ_RAHEAD,
 		.encrypted_page = NULL,
 		.in_list = false,
-		.is_meta = (type != META_POR),
+		.is_por = (type == META_POR),
 	};
 	struct blk_plug plug;
 
@@ -306,8 +337,9 @@ static int f2fs_write_meta_pages(struct address_space *mapping,
 		goto skip_write;
 
 	/* collect a number of dirty meta pages and write together */
-	if (wbc->for_kupdate ||
-		get_pages(sbi, F2FS_DIRTY_META) < nr_pages_to_skip(sbi, META))
+	if (wbc->sync_mode != WB_SYNC_ALL &&
+			get_pages(sbi, F2FS_DIRTY_META) <
+					nr_pages_to_skip(sbi, META))
 		goto skip_write;
 
 	/* if locked failed, cp will flush dirty pages instead */
@@ -405,7 +437,7 @@ static int f2fs_set_meta_page_dirty(struct page *page)
 	if (!PageDirty(page)) {
 		__set_page_dirty_nobuffers(page);
 		inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_META);
-		SetPagePrivate(page);
+		f2fs_set_page_private(page, 0);
 		f2fs_trace_pid(page);
 		return 1;
 	}
@@ -625,9 +657,8 @@ static int recover_orphan_inode(struct f2fs_sb_info *sbi, nid_t ino)
 
 err_out:
 	set_sbi_flag(sbi, SBI_NEED_FSCK);
-	f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: orphan failed (ino=%x), run fsck to fix.",
-			__func__, ino);
+	f2fs_warn(sbi, "%s: orphan failed (ino=%x), run fsck to fix.",
+		  __func__, ino);
 	return err;
 }
 
@@ -643,8 +674,13 @@ int f2fs_recover_orphan_inodes(struct f2fs_sb_info *sbi)
 	if (!is_set_ckpt_flags(sbi, CP_ORPHAN_PRESENT_FLAG))
 		return 0;
 
+	if (bdev_read_only(sbi->sb->s_bdev)) {
+		f2fs_info(sbi, "write access unavailable, skipping orphan cleanup");
+		return 0;
+	}
+
 	if (s_flags & SB_RDONLY) {
-		f2fs_msg(sbi->sb, KERN_INFO, "orphan cleanup on readonly fs");
+		f2fs_info(sbi, "orphan cleanup on readonly fs");
 		sbi->sb->s_flags &= ~SB_RDONLY;
 	}
 
@@ -757,13 +793,27 @@ static void write_orphan_inodes(struct f2fs_sb_info *sbi, block_t start_blk)
 	}
 }
 
+static __u32 f2fs_checkpoint_chksum(struct f2fs_sb_info *sbi,
+						struct f2fs_checkpoint *ckpt)
+{
+	unsigned int chksum_ofs = le32_to_cpu(ckpt->checksum_offset);
+	__u32 chksum;
+
+	chksum = f2fs_crc32(sbi, ckpt, chksum_ofs);
+	if (chksum_ofs < CP_CHKSUM_OFFSET) {
+		chksum_ofs += sizeof(chksum);
+		chksum = f2fs_chksum(sbi, chksum, (__u8 *)ckpt + chksum_ofs,
+						F2FS_BLKSIZE - chksum_ofs);
+	}
+	return chksum;
+}
+
 static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
 		struct f2fs_checkpoint **cp_block, struct page **cp_page,
 		unsigned long long *version)
 {
-	unsigned long blk_size = sbi->blocksize;
 	size_t crc_offset = 0;
-	__u32 crc = 0;
+	__u32 crc;
 
 	*cp_page = f2fs_get_meta_page(sbi, cp_addr);
 	if (IS_ERR(*cp_page))
@@ -772,17 +822,17 @@ static int get_checkpoint_version(struct f2fs_sb_info *sbi, block_t cp_addr,
 	*cp_block = (struct f2fs_checkpoint *)page_address(*cp_page);
 
 	crc_offset = le32_to_cpu((*cp_block)->checksum_offset);
-	if (crc_offset > (blk_size - sizeof(__le32))) {
+	if (crc_offset < CP_MIN_CHKSUM_OFFSET ||
+			crc_offset > CP_CHKSUM_OFFSET) {
 		f2fs_put_page(*cp_page, 1);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"invalid crc_offset: %zu", crc_offset);
+		f2fs_warn(sbi, "invalid crc_offset: %zu", crc_offset);
 		return -EINVAL;
 	}
 
-	crc = cur_cp_crc(*cp_block);
-	if (!f2fs_crc_valid(sbi, crc, *cp_block, crc_offset)) {
+	crc = f2fs_checkpoint_chksum(sbi, *cp_block);
+	if (crc != cur_cp_crc(*cp_block)) {
 		f2fs_put_page(*cp_page, 1);
-		f2fs_msg(sbi->sb, KERN_WARNING, "invalid crc value");
+		f2fs_warn(sbi, "invalid crc value");
 		return -EINVAL;
 	}
 
@@ -805,9 +855,8 @@ static struct page *validate_checkpoint(struct f2fs_sb_info *sbi,
 
 	if (le32_to_cpu(cp_block->cp_pack_total_block_count) >
 					sbi->blocks_per_seg) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"invalid cp_pack_total_block_count:%u",
-			le32_to_cpu(cp_block->cp_pack_total_block_count));
+		f2fs_warn(sbi, "invalid cp_pack_total_block_count:%u",
+			  le32_to_cpu(cp_block->cp_pack_total_block_count));
 		goto invalid_cp;
 	}
 	pre_version = *version;
@@ -841,6 +890,7 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
 	unsigned int cp_blks = 1 + __cp_payload(sbi);
 	block_t cp_blk_no;
 	int i;
+	int err;
 
 	sbi->ckpt = f2fs_kzalloc(sbi, array_size(blk_size, cp_blks),
 				 GFP_KERNEL);
@@ -868,6 +918,7 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
 	} else if (cp2) {
 		cur_page = cp2;
 	} else {
+		err = -EFSCORRUPTED;
 		goto fail_no_cp;
 	}
 
@@ -880,8 +931,10 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
 		sbi->cur_cp_pack = 2;
 
 	/* Sanity checking of checkpoint */
-	if (f2fs_sanity_check_ckpt(sbi))
+	if (f2fs_sanity_check_ckpt(sbi)) {
+		err = -EFSCORRUPTED;
 		goto free_fail_no_cp;
+	}
 
 	if (cp_blks <= 1)
 		goto done;
@@ -895,8 +948,10 @@ int f2fs_get_valid_checkpoint(struct f2fs_sb_info *sbi)
 		unsigned char *ckpt = (unsigned char *)sbi->ckpt;
 
 		cur_page = f2fs_get_meta_page(sbi, cp_blk_no + i);
-		if (IS_ERR(cur_page))
+		if (IS_ERR(cur_page)) {
+			err = PTR_ERR(cur_page);
 			goto free_fail_no_cp;
+		}
 		sit_bitmap_ptr = page_address(cur_page);
 		memcpy(ckpt + i * blk_size, sit_bitmap_ptr, blk_size);
 		f2fs_put_page(cur_page, 1);
@@ -911,7 +966,7 @@ free_fail_no_cp:
 	f2fs_put_page(cp2, 1);
 fail_no_cp:
 	kvfree(sbi->ckpt);
-	return -EINVAL;
+	return err;
 }
 
 static void __add_dirty_inode(struct inode *inode, enum inode_type type)
@@ -956,7 +1011,7 @@ void f2fs_update_dirty_page(struct inode *inode, struct page *page)
 	inode_inc_dirty_pages(inode);
 	spin_unlock(&sbi->inode_lock[type]);
 
-	SetPagePrivate(page);
+	f2fs_set_page_private(page, 0);
 	f2fs_trace_pid(page);
 }
 
@@ -1008,13 +1063,11 @@ retry:
 	if (inode) {
 		unsigned long cur_ino = inode->i_ino;
 
-		if (is_dir)
-			F2FS_I(inode)->cp_task = current;
+		F2FS_I(inode)->cp_task = current;
 
 		filemap_fdatawrite(inode->i_mapping);
 
-		if (is_dir)
-			F2FS_I(inode)->cp_task = NULL;
+		F2FS_I(inode)->cp_task = NULL;
 
 		iput(inode);
 		/* We need to give cpu to another writers. */
@@ -1080,17 +1133,24 @@ static void __prepare_cp_block(struct f2fs_sb_info *sbi)
 
 static bool __need_flush_quota(struct f2fs_sb_info *sbi)
 {
+	bool ret = false;
+
 	if (!is_journalled_quota(sbi))
 		return false;
-	if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
-		return false;
-	if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR))
-		return false;
-	if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH))
-		return true;
-	if (get_pages(sbi, F2FS_DIRTY_QDATA))
-		return true;
-	return false;
+
+	down_write(&sbi->quota_sem);
+	if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH)) {
+		ret = false;
+	} else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_REPAIR)) {
+		ret = false;
+	} else if (is_sbi_flag_set(sbi, SBI_QUOTA_NEED_FLUSH)) {
+		clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
+		ret = true;
+	} else if (get_pages(sbi, F2FS_DIRTY_QDATA)) {
+		ret = true;
+	}
+	up_write(&sbi->quota_sem);
+	return ret;
 }
 
 /*
@@ -1109,26 +1169,22 @@ static int block_operations(struct f2fs_sb_info *sbi)
 	blk_start_plug(&plug);
 
 retry_flush_quotas:
+	f2fs_lock_all(sbi);
 	if (__need_flush_quota(sbi)) {
 		int locked;
 
 		if (++cnt > DEFAULT_RETRY_QUOTA_FLUSH_COUNT) {
 			set_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
-			f2fs_lock_all(sbi);
+			set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
 			goto retry_flush_dents;
 		}
-		clear_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
+		f2fs_unlock_all(sbi);
 
 		/* only failed during mount/umount/freeze/quotactl */
 		locked = down_read_trylock(&sbi->sb->s_umount);
 		f2fs_quota_sync(sbi->sb, -1);
 		if (locked)
 			up_read(&sbi->sb->s_umount);
-	}
-
-	f2fs_lock_all(sbi);
-	if (__need_flush_quota(sbi)) {
-		f2fs_unlock_all(sbi);
 		cond_resched();
 		goto retry_flush_quotas;
 	}
@@ -1150,12 +1206,6 @@ retry_flush_dents:
 	 */
 	down_write(&sbi->node_change);
 
-	if (__need_flush_quota(sbi)) {
-		up_write(&sbi->node_change);
-		f2fs_unlock_all(sbi);
-		goto retry_flush_quotas;
-	}
-
 	if (get_pages(sbi, F2FS_DIRTY_IMETA)) {
 		up_write(&sbi->node_change);
 		f2fs_unlock_all(sbi);
@@ -1251,7 +1301,8 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	else
 		__clear_ckpt_flags(ckpt, CP_ORPHAN_PRESENT_FLAG);
 
-	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK))
+	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK) ||
+		is_sbi_flag_set(sbi, SBI_IS_RESIZEFS))
 		__set_ckpt_flags(ckpt, CP_FSCK_FLAG);
 
 	if (is_sbi_flag_set(sbi, SBI_CP_DISABLED))
@@ -1259,6 +1310,11 @@ static void update_ckpt_flags(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	else
 		__clear_ckpt_flags(ckpt, CP_DISABLED_FLAG);
 
+	if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK))
+		__set_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
+	else
+		__clear_ckpt_flags(ckpt, CP_DISABLED_QUICK_FLAG);
+
 	if (is_sbi_flag_set(sbi, SBI_QUOTA_SKIP_FLUSH))
 		__set_ckpt_flags(ckpt, CP_QUOTA_NEED_FSCK_FLAG);
 	else
@@ -1383,7 +1439,7 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	get_sit_bitmap(sbi, __bitmap_ptr(sbi, SIT_BITMAP));
 	get_nat_bitmap(sbi, __bitmap_ptr(sbi, NAT_BITMAP));
 
-	crc32 = f2fs_crc32(sbi, ckpt, le32_to_cpu(ckpt->checksum_offset));
+	crc32 = f2fs_checkpoint_chksum(sbi, ckpt);
 	*((__le32 *)((unsigned char *)ckpt +
 				le32_to_cpu(ckpt->checksum_offset)))
 				= cpu_to_le32(crc32);
@@ -1467,7 +1523,11 @@ static int do_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	clear_sbi_flag(sbi, SBI_IS_DIRTY);
 	clear_sbi_flag(sbi, SBI_NEED_CP);
 	clear_sbi_flag(sbi, SBI_QUOTA_SKIP_FLUSH);
+
+	spin_lock(&sbi->stat_lock);
 	sbi->unusable_block_count = 0;
+	spin_unlock(&sbi->stat_lock);
+
 	__set_cp_next_pack(sbi);
 
 	/*
@@ -1492,11 +1552,13 @@ int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	unsigned long long ckpt_ver;
 	int err = 0;
 
+	if (f2fs_readonly(sbi->sb) || f2fs_hw_is_readonly(sbi))
+		return -EROFS;
+
 	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
 		if (cpc->reason != CP_PAUSE)
 			return 0;
-		f2fs_msg(sbi->sb, KERN_WARNING,
-				"Start checkpoint disabled!");
+		f2fs_warn(sbi, "Start checkpoint disabled!");
 	}
 	mutex_lock(&sbi->cp_mutex);
 
@@ -1508,10 +1570,6 @@ int f2fs_write_checkpoint(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 		err = -EIO;
 		goto out;
 	}
-	if (f2fs_readonly(sbi->sb)) {
-		err = -EROFS;
-		goto out;
-	}
 
 	trace_f2fs_write_checkpoint(sbi->sb, cpc->reason, "start block_ops");
 
@@ -1566,8 +1624,7 @@ stop:
 	stat_inc_cp_count(sbi->stat_info);
 
 	if (cpc->reason & CP_RECOVERY)
-		f2fs_msg(sbi->sb, KERN_NOTICE,
-			"checkpoint: version = %llx", ckpt_ver);
+		f2fs_notice(sbi, "checkpoint: version = %llx", ckpt_ver);
 
 	/* do checkpoint periodically */
 	f2fs_update_time(sbi, CP_TIME);
diff --git a/fs/f2fs/data.c b/fs/f2fs/data.c
index f91d8630c9a2..0ca530afc684 100644
--- a/fs/f2fs/data.c
+++ b/fs/f2fs/data.c
@@ -14,6 +14,7 @@
 #include <linux/pagevec.h>
 #include <linux/blkdev.h>
 #include <linux/bio.h>
+#include <linux/swap.h>
 #include <linux/prefetch.h>
 #include <linux/uio.h>
 #include <linux/cleancache.h>
@@ -54,7 +55,7 @@ static bool __is_cp_guaranteed(struct page *page)
 
 static enum count_type __read_io_type(struct page *page)
 {
-	struct address_space *mapping = page->mapping;
+	struct address_space *mapping = page_file_mapping(page);
 
 	if (mapping) {
 		struct inode *inode = mapping->host;
@@ -86,9 +87,9 @@ static void __read_end_io(struct bio *bio)
 {
 	struct page *page;
 	struct bio_vec *bv;
-	int i;
+	struct bvec_iter_all iter_all;
 
-	bio_for_each_segment_all(bv, bio, i) {
+	bio_for_each_segment_all(bv, bio, iter_all) {
 		page = bv->bv_page;
 
 		/* PG_error was set if any post_read step failed */
@@ -163,14 +164,14 @@ static void f2fs_write_end_io(struct bio *bio)
 {
 	struct f2fs_sb_info *sbi = bio->bi_private;
 	struct bio_vec *bvec;
-	int i;
+	struct bvec_iter_all iter_all;
 
 	if (time_to_inject(sbi, FAULT_WRITE_IO)) {
 		f2fs_show_injection_info(FAULT_WRITE_IO);
 		bio->bi_status = BLK_STS_IOERR;
 	}
 
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 		struct page *page = bvec->bv_page;
 		enum count_type type = WB_DATA_TYPE(page);
 
@@ -185,7 +186,7 @@ static void f2fs_write_end_io(struct bio *bio)
 			continue;
 		}
 
-		fscrypt_pullback_bio_page(&page, true);
+		fscrypt_finalize_bounce_page(&page);
 
 		if (unlikely(bio->bi_status)) {
 			mapping_set_error(page->mapping, -EIO);
@@ -218,12 +219,14 @@ struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
 	struct block_device *bdev = sbi->sb->s_bdev;
 	int i;
 
-	for (i = 0; i < sbi->s_ndevs; i++) {
-		if (FDEV(i).start_blk <= blk_addr &&
-					FDEV(i).end_blk >= blk_addr) {
-			blk_addr -= FDEV(i).start_blk;
-			bdev = FDEV(i).bdev;
-			break;
+	if (f2fs_is_multi_device(sbi)) {
+		for (i = 0; i < sbi->s_ndevs; i++) {
+			if (FDEV(i).start_blk <= blk_addr &&
+			    FDEV(i).end_blk >= blk_addr) {
+				blk_addr -= FDEV(i).start_blk;
+				bdev = FDEV(i).bdev;
+				break;
+			}
 		}
 	}
 	if (bio) {
@@ -237,6 +240,9 @@ int f2fs_target_device_index(struct f2fs_sb_info *sbi, block_t blkaddr)
 {
 	int i;
 
+	if (!f2fs_is_multi_device(sbi))
+		return 0;
+
 	for (i = 0; i < sbi->s_ndevs; i++)
 		if (FDEV(i).start_blk <= blkaddr && FDEV(i).end_blk >= blkaddr)
 			return i;
@@ -299,9 +305,10 @@ static inline void __submit_bio(struct f2fs_sb_info *sbi,
 		for (; start < F2FS_IO_SIZE(sbi); start++) {
 			struct page *page =
 				mempool_alloc(sbi->write_io_dummy,
-					GFP_NOIO | __GFP_ZERO | __GFP_NOFAIL);
+					      GFP_NOIO | __GFP_NOFAIL);
 			f2fs_bug_on(sbi, !page);
 
+			zero_user_segment(page, 0, PAGE_SIZE);
 			SetPagePrivate(page);
 			set_page_private(page, (unsigned long)DUMMY_WRITTEN_PAGE);
 			lock_page(page);
@@ -341,25 +348,24 @@ static void __submit_merged_bio(struct f2fs_bio_info *io)
 	io->bio = NULL;
 }
 
-static bool __has_merged_page(struct f2fs_bio_info *io, struct inode *inode,
+static bool __has_merged_page(struct bio *bio, struct inode *inode,
 						struct page *page, nid_t ino)
 {
 	struct bio_vec *bvec;
 	struct page *target;
-	int i;
+	struct bvec_iter_all iter_all;
 
-	if (!io->bio)
+	if (!bio)
 		return false;
 
 	if (!inode && !page && !ino)
 		return true;
 
-	bio_for_each_segment_all(bvec, io->bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 
-		if (bvec->bv_page->mapping)
-			target = bvec->bv_page;
-		else
-			target = fscrypt_control_page(bvec->bv_page);
+		target = bvec->bv_page;
+		if (fscrypt_is_bounce_page(target))
+			target = fscrypt_pagecache_page(target);
 
 		if (inode && inode == target->mapping->host)
 			return true;
@@ -405,7 +411,7 @@ static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
 			struct f2fs_bio_info *io = sbi->write_io[btype] + temp;
 
 			down_read(&io->io_rwsem);
-			ret = __has_merged_page(io, inode, page, ino);
+			ret = __has_merged_page(io->bio, inode, page, ino);
 			up_read(&io->io_rwsem);
 		}
 		if (ret)
@@ -419,7 +425,7 @@ static void __submit_merged_write_cond(struct f2fs_sb_info *sbi,
 
 void f2fs_submit_merged_write(struct f2fs_sb_info *sbi, enum page_type type)
 {
-	__submit_merged_write_cond(sbi, NULL, 0, 0, type, true);
+	__submit_merged_write_cond(sbi, NULL, NULL, 0, type, true);
 }
 
 void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
@@ -447,8 +453,9 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
 			fio->encrypted_page : fio->page;
 
 	if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
-			__is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
-		return -EFAULT;
+			fio->is_por ? META_POR : (__is_meta_io(fio) ?
+			META_GENERIC : DATA_GENERIC_ENHANCE)))
+		return -EFSCORRUPTED;
 
 	trace_f2fs_submit_page_bio(page, fio);
 	f2fs_trace_ios(fio, 0);
@@ -474,6 +481,61 @@ int f2fs_submit_page_bio(struct f2fs_io_info *fio)
 	return 0;
 }
 
+int f2fs_merge_page_bio(struct f2fs_io_info *fio)
+{
+	struct bio *bio = *fio->bio;
+	struct page *page = fio->encrypted_page ?
+			fio->encrypted_page : fio->page;
+
+	if (!f2fs_is_valid_blkaddr(fio->sbi, fio->new_blkaddr,
+			__is_meta_io(fio) ? META_GENERIC : DATA_GENERIC))
+		return -EFSCORRUPTED;
+
+	trace_f2fs_submit_page_bio(page, fio);
+	f2fs_trace_ios(fio, 0);
+
+	if (bio && (*fio->last_block + 1 != fio->new_blkaddr ||
+			!__same_bdev(fio->sbi, fio->new_blkaddr, bio))) {
+		__submit_bio(fio->sbi, bio, fio->type);
+		bio = NULL;
+	}
+alloc_new:
+	if (!bio) {
+		bio = __bio_alloc(fio->sbi, fio->new_blkaddr, fio->io_wbc,
+				BIO_MAX_PAGES, false, fio->type, fio->temp);
+		bio_set_op_attrs(bio, fio->op, fio->op_flags);
+	}
+
+	if (bio_add_page(bio, page, PAGE_SIZE, 0) < PAGE_SIZE) {
+		__submit_bio(fio->sbi, bio, fio->type);
+		bio = NULL;
+		goto alloc_new;
+	}
+
+	if (fio->io_wbc)
+		wbc_account_io(fio->io_wbc, page, PAGE_SIZE);
+
+	inc_page_count(fio->sbi, WB_DATA_TYPE(page));
+
+	*fio->last_block = fio->new_blkaddr;
+	*fio->bio = bio;
+
+	return 0;
+}
+
+static void f2fs_submit_ipu_bio(struct f2fs_sb_info *sbi, struct bio **bio,
+							struct page *page)
+{
+	if (!bio)
+		return;
+
+	if (!__has_merged_page(*bio, NULL, page, 0))
+		return;
+
+	__submit_bio(sbi, *bio, DATA);
+	*bio = NULL;
+}
+
 void f2fs_submit_page_write(struct f2fs_io_info *fio)
 {
 	struct f2fs_sb_info *sbi = fio->sbi;
@@ -497,9 +559,7 @@ next:
 		spin_unlock(&io->io_lock);
 	}
 
-	if (__is_valid_data_blkaddr(fio->old_blkaddr))
-		verify_block_addr(fio, fio->old_blkaddr);
-	verify_block_addr(fio, fio->new_blkaddr);
+	verify_fio_blkaddr(fio);
 
 	bio_page = fio->encrypted_page ? fio->encrypted_page : fio->page;
 
@@ -556,9 +616,6 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
 	struct bio_post_read_ctx *ctx;
 	unsigned int post_read_steps = 0;
 
-	if (!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC))
-		return ERR_PTR(-EFAULT);
-
 	bio = f2fs_bio_alloc(sbi, min_t(int, nr_pages, BIO_MAX_PAGES), false);
 	if (!bio)
 		return ERR_PTR(-ENOMEM);
@@ -586,8 +643,10 @@ static struct bio *f2fs_grab_read_bio(struct inode *inode, block_t blkaddr,
 static int f2fs_submit_page_read(struct inode *inode, struct page *page,
 							block_t blkaddr)
 {
-	struct bio *bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0);
+	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
+	struct bio *bio;
 
+	bio = f2fs_grab_read_bio(inode, blkaddr, 1, 0);
 	if (IS_ERR(bio))
 		return PTR_ERR(bio);
 
@@ -599,8 +658,8 @@ static int f2fs_submit_page_read(struct inode *inode, struct page *page,
 		return -EFAULT;
 	}
 	ClearPageError(page);
-	inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
-	__submit_bio(F2FS_I_SB(inode), bio, DATA);
+	inc_page_count(sbi, F2FS_RD_DATA);
+	__submit_bio(sbi, bio, DATA);
 	return 0;
 }
 
@@ -728,6 +787,11 @@ struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
 
 	if (f2fs_lookup_extent_cache(inode, index, &ei)) {
 		dn.data_blkaddr = ei.blk + index - ei.fofs;
+		if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), dn.data_blkaddr,
+						DATA_GENERIC_ENHANCE_READ)) {
+			err = -EFSCORRUPTED;
+			goto put_err;
+		}
 		goto got_it;
 	}
 
@@ -741,6 +805,13 @@ struct page *f2fs_get_read_data_page(struct inode *inode, pgoff_t index,
 		err = -ENOENT;
 		goto put_err;
 	}
+	if (dn.data_blkaddr != NEW_ADDR &&
+			!f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
+						dn.data_blkaddr,
+						DATA_GENERIC_ENHANCE)) {
+		err = -EFSCORRUPTED;
+		goto put_err;
+	}
 got_it:
 	if (PageUptodate(page)) {
 		unlock_page(page);
@@ -1083,12 +1154,12 @@ next_block:
 	blkaddr = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
 
 	if (__is_valid_data_blkaddr(blkaddr) &&
-		!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC)) {
-		err = -EFAULT;
+		!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE)) {
+		err = -EFSCORRUPTED;
 		goto sync_out;
 	}
 
-	if (is_valid_data_blkaddr(sbi, blkaddr)) {
+	if (__is_valid_data_blkaddr(blkaddr)) {
 		/* use out-place-update for driect IO under LFS mode */
 		if (test_opt(sbi, LFS) && flag == F2FS_GET_BLOCK_DIO &&
 							map->m_may_create) {
@@ -1465,7 +1536,7 @@ next:
 	}
 
 	if (size) {
-		if (f2fs_encrypted_inode(inode))
+		if (IS_ENCRYPTED(inode))
 			flags |= FIEMAP_EXTENT_DATA_ENCRYPTED;
 
 		ret = fiemap_fill_next_extent(fieinfo, logical,
@@ -1498,6 +1569,119 @@ out:
 	return ret;
 }
 
+static int f2fs_read_single_page(struct inode *inode, struct page *page,
+					unsigned nr_pages,
+					struct f2fs_map_blocks *map,
+					struct bio **bio_ret,
+					sector_t *last_block_in_bio,
+					bool is_readahead)
+{
+	struct bio *bio = *bio_ret;
+	const unsigned blkbits = inode->i_blkbits;
+	const unsigned blocksize = 1 << blkbits;
+	sector_t block_in_file;
+	sector_t last_block;
+	sector_t last_block_in_file;
+	sector_t block_nr;
+	int ret = 0;
+
+	block_in_file = (sector_t)page_index(page);
+	last_block = block_in_file + nr_pages;
+	last_block_in_file = (i_size_read(inode) + blocksize - 1) >>
+							blkbits;
+	if (last_block > last_block_in_file)
+		last_block = last_block_in_file;
+
+	/* just zeroing out page which is beyond EOF */
+	if (block_in_file >= last_block)
+		goto zero_out;
+	/*
+	 * Map blocks using the previous result first.
+	 */
+	if ((map->m_flags & F2FS_MAP_MAPPED) &&
+			block_in_file > map->m_lblk &&
+			block_in_file < (map->m_lblk + map->m_len))
+		goto got_it;
+
+	/*
+	 * Then do more f2fs_map_blocks() calls until we are
+	 * done with this page.
+	 */
+	map->m_lblk = block_in_file;
+	map->m_len = last_block - block_in_file;
+
+	ret = f2fs_map_blocks(inode, map, 0, F2FS_GET_BLOCK_DEFAULT);
+	if (ret)
+		goto out;
+got_it:
+	if ((map->m_flags & F2FS_MAP_MAPPED)) {
+		block_nr = map->m_pblk + block_in_file - map->m_lblk;
+		SetPageMappedToDisk(page);
+
+		if (!PageUptodate(page) && (!PageSwapCache(page) &&
+					!cleancache_get_page(page))) {
+			SetPageUptodate(page);
+			goto confused;
+		}
+
+		if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
+						DATA_GENERIC_ENHANCE_READ)) {
+			ret = -EFSCORRUPTED;
+			goto out;
+		}
+	} else {
+zero_out:
+		zero_user_segment(page, 0, PAGE_SIZE);
+		if (!PageUptodate(page))
+			SetPageUptodate(page);
+		unlock_page(page);
+		goto out;
+	}
+
+	/*
+	 * This page will go to BIO.  Do we need to send this
+	 * BIO off first?
+	 */
+	if (bio && (*last_block_in_bio != block_nr - 1 ||
+		!__same_bdev(F2FS_I_SB(inode), block_nr, bio))) {
+submit_and_realloc:
+		__submit_bio(F2FS_I_SB(inode), bio, DATA);
+		bio = NULL;
+	}
+	if (bio == NULL) {
+		bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
+				is_readahead ? REQ_RAHEAD : 0);
+		if (IS_ERR(bio)) {
+			ret = PTR_ERR(bio);
+			bio = NULL;
+			goto out;
+		}
+	}
+
+	/*
+	 * If the page is under writeback, we need to wait for
+	 * its completion to see the correct decrypted data.
+	 */
+	f2fs_wait_on_block_writeback(inode, block_nr);
+
+	if (bio_add_page(bio, page, blocksize, 0) < blocksize)
+		goto submit_and_realloc;
+
+	inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
+	ClearPageError(page);
+	*last_block_in_bio = block_nr;
+	goto out;
+confused:
+	if (bio) {
+		__submit_bio(F2FS_I_SB(inode), bio, DATA);
+		bio = NULL;
+	}
+	unlock_page(page);
+out:
+	*bio_ret = bio;
+	return ret;
+}
+
 /*
  * This function was originally taken from fs/mpage.c, and customized for f2fs.
  * Major change was from block_size == page_size in f2fs by default.
@@ -1514,13 +1698,8 @@ static int f2fs_mpage_readpages(struct address_space *mapping,
 	struct bio *bio = NULL;
 	sector_t last_block_in_bio = 0;
 	struct inode *inode = mapping->host;
-	const unsigned blkbits = inode->i_blkbits;
-	const unsigned blocksize = 1 << blkbits;
-	sector_t block_in_file;
-	sector_t last_block;
-	sector_t last_block_in_file;
-	sector_t block_nr;
 	struct f2fs_map_blocks map;
+	int ret = 0;
 
 	map.m_pblk = 0;
 	map.m_lblk = 0;
@@ -1538,104 +1717,18 @@ static int f2fs_mpage_readpages(struct address_space *mapping,
 			prefetchw(&page->flags);
 			list_del(&page->lru);
 			if (add_to_page_cache_lru(page, mapping,
-						  page->index,
+						  page_index(page),
 						  readahead_gfp_mask(mapping)))
 				goto next_page;
 		}
 
-		block_in_file = (sector_t)page->index;
-		last_block = block_in_file + nr_pages;
-		last_block_in_file = (i_size_read(inode) + blocksize - 1) >>
-								blkbits;
-		if (last_block > last_block_in_file)
-			last_block = last_block_in_file;
-
-		/*
-		 * Map blocks using the previous result first.
-		 */
-		if ((map.m_flags & F2FS_MAP_MAPPED) &&
-				block_in_file > map.m_lblk &&
-				block_in_file < (map.m_lblk + map.m_len))
-			goto got_it;
-
-		/*
-		 * Then do more f2fs_map_blocks() calls until we are
-		 * done with this page.
-		 */
-		map.m_flags = 0;
-
-		if (block_in_file < last_block) {
-			map.m_lblk = block_in_file;
-			map.m_len = last_block - block_in_file;
-
-			if (f2fs_map_blocks(inode, &map, 0,
-						F2FS_GET_BLOCK_DEFAULT))
-				goto set_error_page;
-		}
-got_it:
-		if ((map.m_flags & F2FS_MAP_MAPPED)) {
-			block_nr = map.m_pblk + block_in_file - map.m_lblk;
-			SetPageMappedToDisk(page);
-
-			if (!PageUptodate(page) && !cleancache_get_page(page)) {
-				SetPageUptodate(page);
-				goto confused;
-			}
-
-			if (!f2fs_is_valid_blkaddr(F2FS_I_SB(inode), block_nr,
-								DATA_GENERIC))
-				goto set_error_page;
-		} else {
+		ret = f2fs_read_single_page(inode, page, nr_pages, &map, &bio,
+					&last_block_in_bio, is_readahead);
+		if (ret) {
+			SetPageError(page);
 			zero_user_segment(page, 0, PAGE_SIZE);
-			if (!PageUptodate(page))
-				SetPageUptodate(page);
 			unlock_page(page);
-			goto next_page;
-		}
-
-		/*
-		 * This page will go to BIO.  Do we need to send this
-		 * BIO off first?
-		 */
-		if (bio && (last_block_in_bio != block_nr - 1 ||
-			!__same_bdev(F2FS_I_SB(inode), block_nr, bio))) {
-submit_and_realloc:
-			__submit_bio(F2FS_I_SB(inode), bio, DATA);
-			bio = NULL;
-		}
-		if (bio == NULL) {
-			bio = f2fs_grab_read_bio(inode, block_nr, nr_pages,
-					is_readahead ? REQ_RAHEAD : 0);
-			if (IS_ERR(bio)) {
-				bio = NULL;
-				goto set_error_page;
-			}
 		}
-
-		/*
-		 * If the page is under writeback, we need to wait for
-		 * its completion to see the correct decrypted data.
-		 */
-		f2fs_wait_on_block_writeback(inode, block_nr);
-
-		if (bio_add_page(bio, page, blocksize, 0) < blocksize)
-			goto submit_and_realloc;
-
-		inc_page_count(F2FS_I_SB(inode), F2FS_RD_DATA);
-		ClearPageError(page);
-		last_block_in_bio = block_nr;
-		goto next_page;
-set_error_page:
-		SetPageError(page);
-		zero_user_segment(page, 0, PAGE_SIZE);
-		unlock_page(page);
-		goto next_page;
-confused:
-		if (bio) {
-			__submit_bio(F2FS_I_SB(inode), bio, DATA);
-			bio = NULL;
-		}
-		unlock_page(page);
 next_page:
 		if (pages)
 			put_page(page);
@@ -1643,12 +1736,12 @@ next_page:
 	BUG_ON(pages && !list_empty(pages));
 	if (bio)
 		__submit_bio(F2FS_I_SB(inode), bio, DATA);
-	return 0;
+	return pages ? 0 : ret;
 }
 
 static int f2fs_read_data_page(struct file *file, struct page *page)
 {
-	struct inode *inode = page->mapping->host;
+	struct inode *inode = page_file_mapping(page)->host;
 	int ret = -EAGAIN;
 
 	trace_f2fs_readpage(page, DATA);
@@ -1657,7 +1750,8 @@ static int f2fs_read_data_page(struct file *file, struct page *page)
 	if (f2fs_has_inline_data(inode))
 		ret = f2fs_read_inline_data(inode, page);
 	if (ret == -EAGAIN)
-		ret = f2fs_mpage_readpages(page->mapping, NULL, page, 1, false);
+		ret = f2fs_mpage_readpages(page_file_mapping(page),
+						NULL, page, 1, false);
 	return ret;
 }
 
@@ -1690,8 +1784,9 @@ static int encrypt_one_page(struct f2fs_io_info *fio)
 	f2fs_wait_on_block_writeback(inode, fio->old_blkaddr);
 
 retry_encrypt:
-	fio->encrypted_page = fscrypt_encrypt_page(inode, fio->page,
-			PAGE_SIZE, 0, fio->page->index, gfp_flags);
+	fio->encrypted_page = fscrypt_encrypt_pagecache_blocks(fio->page,
+							       PAGE_SIZE, 0,
+							       gfp_flags);
 	if (IS_ERR(fio->encrypted_page)) {
 		/* flush pending IOs and wait for a while in the ENOMEM case */
 		if (PTR_ERR(fio->encrypted_page) == -ENOMEM) {
@@ -1736,7 +1831,7 @@ static inline bool check_inplace_update_policy(struct inode *inode,
 	if (policy & (0x1 << F2FS_IPU_ASYNC) &&
 			fio && fio->op == REQ_OP_WRITE &&
 			!(fio->op_flags & REQ_SYNC) &&
-			!f2fs_encrypted_inode(inode))
+			!IS_ENCRYPTED(inode))
 		return true;
 
 	/* this is only set during fdatasync */
@@ -1813,8 +1908,8 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio)
 		fio->old_blkaddr = ei.blk + page->index - ei.fofs;
 
 		if (!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
-							DATA_GENERIC))
-			return -EFAULT;
+						DATA_GENERIC_ENHANCE))
+			return -EFSCORRUPTED;
 
 		ipu_force = true;
 		fio->need_lock = LOCK_DONE;
@@ -1840,15 +1935,16 @@ int f2fs_do_write_data_page(struct f2fs_io_info *fio)
 got_it:
 	if (__is_valid_data_blkaddr(fio->old_blkaddr) &&
 		!f2fs_is_valid_blkaddr(fio->sbi, fio->old_blkaddr,
-							DATA_GENERIC)) {
-		err = -EFAULT;
+						DATA_GENERIC_ENHANCE)) {
+		err = -EFSCORRUPTED;
 		goto out_writepage;
 	}
 	/*
 	 * If current allocation needs SSR,
 	 * it had better in-place writes for updated data.
 	 */
-	if (ipu_force || (is_valid_data_blkaddr(fio->sbi, fio->old_blkaddr) &&
+	if (ipu_force ||
+		(__is_valid_data_blkaddr(fio->old_blkaddr) &&
 					need_inplace_update(fio))) {
 		err = encrypt_one_page(fio);
 		if (err)
@@ -1860,10 +1956,15 @@ got_it:
 		if (fio->need_lock == LOCK_REQ)
 			f2fs_unlock_op(fio->sbi);
 		err = f2fs_inplace_write_data(fio);
-		if (err && PageWriteback(page))
-			end_page_writeback(page);
+		if (err) {
+			if (f2fs_encrypted_file(inode))
+				fscrypt_finalize_bounce_page(&fio->encrypted_page);
+			if (PageWriteback(page))
+				end_page_writeback(page);
+		} else {
+			set_inode_flag(inode, FI_UPDATE_WRITE);
+		}
 		trace_f2fs_do_write_data_page(fio->page, IPU);
-		set_inode_flag(inode, FI_UPDATE_WRITE);
 		return err;
 	}
 
@@ -1903,6 +2004,8 @@ out:
 }
 
 static int __write_data_page(struct page *page, bool *submitted,
+				struct bio **bio,
+				sector_t *last_block,
 				struct writeback_control *wbc,
 				enum iostat_type io_type)
 {
@@ -1928,6 +2031,8 @@ static int __write_data_page(struct page *page, bool *submitted,
 		.need_lock = LOCK_RETRY,
 		.io_type = io_type,
 		.io_wbc = wbc,
+		.bio = bio,
+		.last_block = last_block,
 	};
 
 	trace_f2fs_writepage(page, DATA);
@@ -2025,10 +2130,14 @@ out:
 	}
 
 	unlock_page(page);
-	if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode))
+	if (!S_ISDIR(inode->i_mode) && !IS_NOQUOTA(inode) &&
+					!F2FS_I(inode)->cp_task) {
+		f2fs_submit_ipu_bio(sbi, bio, page);
 		f2fs_balance_fs(sbi, need_balance_fs);
+	}
 
 	if (unlikely(f2fs_cp_error(sbi))) {
+		f2fs_submit_ipu_bio(sbi, bio, page);
 		f2fs_submit_merged_write(sbi, DATA);
 		submitted = NULL;
 	}
@@ -2055,7 +2164,7 @@ redirty_out:
 static int f2fs_write_data_page(struct page *page,
 					struct writeback_control *wbc)
 {
-	return __write_data_page(page, NULL, wbc, FS_DATA_IO);
+	return __write_data_page(page, NULL, NULL, NULL, wbc, FS_DATA_IO);
 }
 
 /*
@@ -2071,6 +2180,8 @@ static int f2fs_write_cache_pages(struct address_space *mapping,
 	int done = 0;
 	struct pagevec pvec;
 	struct f2fs_sb_info *sbi = F2FS_M_SB(mapping);
+	struct bio *bio = NULL;
+	sector_t last_block;
 	int nr_pages;
 	pgoff_t uninitialized_var(writeback_index);
 	pgoff_t index;
@@ -2147,17 +2258,20 @@ continue_unlock:
 			}
 
 			if (PageWriteback(page)) {
-				if (wbc->sync_mode != WB_SYNC_NONE)
+				if (wbc->sync_mode != WB_SYNC_NONE) {
 					f2fs_wait_on_page_writeback(page,
 							DATA, true, true);
-				else
+					f2fs_submit_ipu_bio(sbi, &bio, page);
+				} else {
 					goto continue_unlock;
+				}
 			}
 
 			if (!clear_page_dirty_for_io(page))
 				goto continue_unlock;
 
-			ret = __write_data_page(page, &submitted, wbc, io_type);
+			ret = __write_data_page(page, &submitted, &bio,
+					&last_block, wbc, io_type);
 			if (unlikely(ret)) {
 				/*
 				 * keep nr_to_write, since vfs uses this to
@@ -2206,6 +2320,9 @@ continue_unlock:
 	if (nwritten)
 		f2fs_submit_merged_write_cond(F2FS_M_SB(mapping), mapping->host,
 								NULL, 0, DATA);
+	/* submit cached bio of IPU write */
+	if (bio)
+		__submit_bio(sbi, bio, DATA);
 
 	return ret;
 }
@@ -2217,6 +2334,9 @@ static inline bool __should_serialize_io(struct inode *inode,
 		return false;
 	if (IS_NOQUOTA(inode))
 		return false;
+	/* to avoid deadlock in path of data flush */
+	if (F2FS_I(inode)->cp_task)
+		return false;
 	if (wbc->sync_mode != WB_SYNC_ALL)
 		return true;
 	if (get_dirty_pages(inode) >= SM_I(F2FS_I_SB(inode))->min_seq_blocks)
@@ -2312,7 +2432,8 @@ static void f2fs_write_failed(struct address_space *mapping, loff_t to)
 		down_write(&F2FS_I(inode)->i_mmap_sem);
 
 		truncate_pagecache(inode, i_size);
-		f2fs_truncate_blocks(inode, i_size, true, true);
+		if (!IS_NOQUOTA(inode))
+			f2fs_truncate_blocks(inode, i_size, true);
 
 		up_write(&F2FS_I(inode)->i_mmap_sem);
 		up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
@@ -2485,6 +2606,11 @@ repeat:
 		zero_user_segment(page, 0, PAGE_SIZE);
 		SetPageUptodate(page);
 	} else {
+		if (!f2fs_is_valid_blkaddr(sbi, blkaddr,
+				DATA_GENERIC_ENHANCE_READ)) {
+			err = -EFSCORRUPTED;
+			goto fail;
+		}
 		err = f2fs_submit_page_read(inode, page, blkaddr);
 		if (err)
 			goto fail;
@@ -2582,14 +2708,11 @@ static void f2fs_dio_submit_bio(struct bio *bio, struct inode *inode,
 {
 	struct f2fs_private_dio *dio;
 	bool write = (bio_op(bio) == REQ_OP_WRITE);
-	int err;
 
 	dio = f2fs_kzalloc(F2FS_I_SB(inode),
 			sizeof(struct f2fs_private_dio), GFP_NOFS);
-	if (!dio) {
-		err = -ENOMEM;
+	if (!dio)
 		goto out;
-	}
 
 	dio->inode = inode;
 	dio->orig_end_io = bio->bi_end_io;
@@ -2707,12 +2830,10 @@ void f2fs_invalidate_page(struct page *page, unsigned int offset,
 
 	clear_cold_data(page);
 
-	/* This is atomic written page, keep Private */
 	if (IS_ATOMIC_WRITTEN_PAGE(page))
 		return f2fs_drop_inmem_page(inode, page);
 
-	set_page_private(page, 0);
-	ClearPagePrivate(page);
+	f2fs_clear_page_private(page);
 }
 
 int f2fs_release_page(struct page *page, gfp_t wait)
@@ -2726,20 +2847,20 @@ int f2fs_release_page(struct page *page, gfp_t wait)
 		return 0;
 
 	clear_cold_data(page);
-	set_page_private(page, 0);
-	ClearPagePrivate(page);
+	f2fs_clear_page_private(page);
 	return 1;
 }
 
 static int f2fs_set_data_page_dirty(struct page *page)
 {
-	struct address_space *mapping = page->mapping;
-	struct inode *inode = mapping->host;
+	struct inode *inode = page_file_mapping(page)->host;
 
 	trace_f2fs_set_page_dirty(page, DATA);
 
 	if (!PageUptodate(page))
 		SetPageUptodate(page);
+	if (PageSwapCache(page))
+		return __set_page_dirty_nobuffers(page);
 
 	if (f2fs_is_atomic_file(inode) && !f2fs_is_commit_atomic_write(inode)) {
 		if (!IS_ATOMIC_WRITTEN_PAGE(page)) {
@@ -2795,12 +2916,8 @@ int f2fs_migrate_page(struct address_space *mapping,
 			return -EAGAIN;
 	}
 
-	/*
-	 * A reference is expected if PagePrivate set when move mapping,
-	 * however F2FS breaks this for maintaining dirty page counts when
-	 * truncating pages. So here adjusting the 'extra_count' make it work.
-	 */
-	extra_count = (atomic_written ? 1 : 0) - page_has_private(page);
+	/* one extra reference was held for atomic_write page */
+	extra_count = atomic_written ? 1 : 0;
 	rc = migrate_page_move_mapping(mapping, newpage,
 				page, mode, extra_count);
 	if (rc != MIGRATEPAGE_SUCCESS) {
@@ -2821,9 +2938,10 @@ int f2fs_migrate_page(struct address_space *mapping,
 		get_page(newpage);
 	}
 
-	if (PagePrivate(page))
-		SetPagePrivate(newpage);
-	set_page_private(newpage, page_private(page));
+	if (PagePrivate(page)) {
+		f2fs_set_page_private(newpage, page_private(page));
+		f2fs_clear_page_private(page);
+	}
 
 	if (mode != MIGRATE_SYNC_NO_COPY)
 		migrate_page_copy(newpage, page);
@@ -2834,6 +2952,126 @@ int f2fs_migrate_page(struct address_space *mapping,
 }
 #endif
 
+#ifdef CONFIG_SWAP
+/* Copied from generic_swapfile_activate() to check any holes */
+static int check_swap_activate(struct file *swap_file, unsigned int max)
+{
+	struct address_space *mapping = swap_file->f_mapping;
+	struct inode *inode = mapping->host;
+	unsigned blocks_per_page;
+	unsigned long page_no;
+	unsigned blkbits;
+	sector_t probe_block;
+	sector_t last_block;
+	sector_t lowest_block = -1;
+	sector_t highest_block = 0;
+
+	blkbits = inode->i_blkbits;
+	blocks_per_page = PAGE_SIZE >> blkbits;
+
+	/*
+	 * Map all the blocks into the extent list.  This code doesn't try
+	 * to be very smart.
+	 */
+	probe_block = 0;
+	page_no = 0;
+	last_block = i_size_read(inode) >> blkbits;
+	while ((probe_block + blocks_per_page) <= last_block && page_no < max) {
+		unsigned block_in_page;
+		sector_t first_block;
+
+		cond_resched();
+
+		first_block = bmap(inode, probe_block);
+		if (first_block == 0)
+			goto bad_bmap;
+
+		/*
+		 * It must be PAGE_SIZE aligned on-disk
+		 */
+		if (first_block & (blocks_per_page - 1)) {
+			probe_block++;
+			goto reprobe;
+		}
+
+		for (block_in_page = 1; block_in_page < blocks_per_page;
+					block_in_page++) {
+			sector_t block;
+
+			block = bmap(inode, probe_block + block_in_page);
+			if (block == 0)
+				goto bad_bmap;
+			if (block != first_block + block_in_page) {
+				/* Discontiguity */
+				probe_block++;
+				goto reprobe;
+			}
+		}
+
+		first_block >>= (PAGE_SHIFT - blkbits);
+		if (page_no) {	/* exclude the header page */
+			if (first_block < lowest_block)
+				lowest_block = first_block;
+			if (first_block > highest_block)
+				highest_block = first_block;
+		}
+
+		page_no++;
+		probe_block += blocks_per_page;
+reprobe:
+		continue;
+	}
+	return 0;
+
+bad_bmap:
+	pr_err("swapon: swapfile has holes\n");
+	return -EINVAL;
+}
+
+static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
+				sector_t *span)
+{
+	struct inode *inode = file_inode(file);
+	int ret;
+
+	if (!S_ISREG(inode->i_mode))
+		return -EINVAL;
+
+	if (f2fs_readonly(F2FS_I_SB(inode)->sb))
+		return -EROFS;
+
+	ret = f2fs_convert_inline_inode(inode);
+	if (ret)
+		return ret;
+
+	ret = check_swap_activate(file, sis->max);
+	if (ret)
+		return ret;
+
+	set_inode_flag(inode, FI_PIN_FILE);
+	f2fs_precache_extents(inode);
+	f2fs_update_time(F2FS_I_SB(inode), REQ_TIME);
+	return 0;
+}
+
+static void f2fs_swap_deactivate(struct file *file)
+{
+	struct inode *inode = file_inode(file);
+
+	clear_inode_flag(inode, FI_PIN_FILE);
+}
+#else
+static int f2fs_swap_activate(struct swap_info_struct *sis, struct file *file,
+				sector_t *span)
+{
+	return -EOPNOTSUPP;
+}
+
+static void f2fs_swap_deactivate(struct file *file)
+{
+}
+#endif
+
 const struct address_space_operations f2fs_dblock_aops = {
 	.readpage	= f2fs_read_data_page,
 	.readpages	= f2fs_read_data_pages,
@@ -2846,6 +3084,8 @@ const struct address_space_operations f2fs_dblock_aops = {
 	.releasepage	= f2fs_release_page,
 	.direct_IO	= f2fs_direct_IO,
 	.bmap		= f2fs_bmap,
+	.swap_activate  = f2fs_swap_activate,
+	.swap_deactivate = f2fs_swap_deactivate,
 #ifdef CONFIG_MIGRATION
 	.migratepage    = f2fs_migrate_page,
 #endif
diff --git a/fs/f2fs/debug.c b/fs/f2fs/debug.c
index ebcc121920ba..7706049d23bf 100644
--- a/fs/f2fs/debug.c
+++ b/fs/f2fs/debug.c
@@ -27,8 +27,15 @@ static DEFINE_MUTEX(f2fs_stat_mutex);
 static void update_general_status(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_stat_info *si = F2FS_STAT(sbi);
+	struct f2fs_super_block *raw_super = F2FS_RAW_SUPER(sbi);
 	int i;
 
+	/* these will be changed if online resize is done */
+	si->main_area_segs = le32_to_cpu(raw_super->segment_count_main);
+	si->main_area_sections = le32_to_cpu(raw_super->section_count);
+	si->main_area_zones = si->main_area_sections /
+				le32_to_cpu(raw_super->secs_per_zone);
+
 	/* validation check of the segment numbers */
 	si->hit_largest = atomic64_read(&sbi->read_hit_largest);
 	si->hit_cached = atomic64_read(&sbi->read_hit_cached);
@@ -96,8 +103,10 @@ static void update_general_status(struct f2fs_sb_info *sbi)
 	si->free_secs = free_sections(sbi);
 	si->prefree_count = prefree_segments(sbi);
 	si->dirty_count = dirty_segments(sbi);
-	si->node_pages = NODE_MAPPING(sbi)->nrpages;
-	si->meta_pages = META_MAPPING(sbi)->nrpages;
+	if (sbi->node_inode)
+		si->node_pages = NODE_MAPPING(sbi)->nrpages;
+	if (sbi->meta_inode)
+		si->meta_pages = META_MAPPING(sbi)->nrpages;
 	si->nats = NM_I(sbi)->nat_cnt;
 	si->dirty_nats = NM_I(sbi)->dirty_nat_cnt;
 	si->sits = MAIN_SEGS(sbi);
@@ -175,7 +184,6 @@ static void update_sit_info(struct f2fs_sb_info *sbi)
 static void update_mem_info(struct f2fs_sb_info *sbi)
 {
 	struct f2fs_stat_info *si = F2FS_STAT(sbi);
-	unsigned npages;
 	int i;
 
 	if (si->base_mem)
@@ -258,10 +266,14 @@ get_cache:
 						sizeof(struct extent_node);
 
 	si->page_mem = 0;
-	npages = NODE_MAPPING(sbi)->nrpages;
-	si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
-	npages = META_MAPPING(sbi)->nrpages;
-	si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
+	if (sbi->node_inode) {
+		unsigned npages = NODE_MAPPING(sbi)->nrpages;
+		si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
+	}
+	if (sbi->meta_inode) {
+		unsigned npages = META_MAPPING(sbi)->nrpages;
+		si->page_mem += (unsigned long long)npages << PAGE_SHIFT;
+	}
 }
 
 static int stat_show(struct seq_file *s, void *v)
@@ -506,30 +518,16 @@ void f2fs_destroy_stats(struct f2fs_sb_info *sbi)
 	kvfree(si);
 }
 
-int __init f2fs_create_root_stats(void)
+void __init f2fs_create_root_stats(void)
 {
-	struct dentry *file;
-
 	f2fs_debugfs_root = debugfs_create_dir("f2fs", NULL);
-	if (!f2fs_debugfs_root)
-		return -ENOMEM;
 
-	file = debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root,
-			NULL, &stat_fops);
-	if (!file) {
-		debugfs_remove(f2fs_debugfs_root);
-		f2fs_debugfs_root = NULL;
-		return -ENOMEM;
-	}
-
-	return 0;
+	debugfs_create_file("status", S_IRUGO, f2fs_debugfs_root, NULL,
+			    &stat_fops);
 }
 
 void f2fs_destroy_root_stats(void)
 {
-	if (!f2fs_debugfs_root)
-		return;
-
 	debugfs_remove_recursive(f2fs_debugfs_root);
 	f2fs_debugfs_root = NULL;
 }
diff --git a/fs/f2fs/dir.c b/fs/f2fs/dir.c
index 50d0d36280fa..85a1528f319f 100644
--- a/fs/f2fs/dir.c
+++ b/fs/f2fs/dir.c
@@ -218,9 +218,8 @@ struct f2fs_dir_entry *__f2fs_find_entry(struct inode *dir,
 
 	max_depth = F2FS_I(dir)->i_current_depth;
 	if (unlikely(max_depth > MAX_DIR_HASH_DEPTH)) {
-		f2fs_msg(F2FS_I_SB(dir)->sb, KERN_WARNING,
-				"Corrupted max_depth of %lu: %u",
-				dir->i_ino, max_depth);
+		f2fs_warn(F2FS_I_SB(dir), "Corrupted max_depth of %lu: %u",
+			  dir->i_ino, max_depth);
 		max_depth = MAX_DIR_HASH_DEPTH;
 		f2fs_i_depth_write(dir, max_depth);
 	}
@@ -385,7 +384,7 @@ struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir,
 		if (err)
 			goto put_error;
 
-		if ((f2fs_encrypted_inode(dir) || dummy_encrypt) &&
+		if ((IS_ENCRYPTED(dir) || dummy_encrypt) &&
 					f2fs_may_encrypt(inode)) {
 			err = fscrypt_inherit_context(dir, inode, page, false);
 			if (err)
@@ -399,7 +398,7 @@ struct page *f2fs_init_inode_metadata(struct inode *inode, struct inode *dir,
 
 	if (new_name) {
 		init_dent_inode(new_name, page);
-		if (f2fs_encrypted_inode(dir))
+		if (IS_ENCRYPTED(dir))
 			file_set_enc_name(inode);
 	}
 
@@ -728,7 +727,7 @@ void f2fs_delete_entry(struct f2fs_dir_entry *dentry, struct page *page,
 		!f2fs_truncate_hole(dir, page->index, page->index + 1)) {
 		f2fs_clear_page_cache_dirty_tag(page);
 		clear_page_dirty_for_io(page);
-		ClearPagePrivate(page);
+		f2fs_clear_page_private(page);
 		ClearPageUptodate(page);
 		clear_cold_data(page);
 		inode_dec_dirty_pages(dir);
@@ -800,6 +799,10 @@ int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
 		if (de->name_len == 0) {
 			bit_pos++;
 			ctx->pos = start_pos + bit_pos;
+			printk_ratelimited(
+				"%s, invalid namelen(0), ino:%u, run fsck to fix.",
+				KERN_WARNING, le32_to_cpu(de->ino));
+			set_sbi_flag(sbi, SBI_NEED_FSCK);
 			continue;
 		}
 
@@ -810,21 +813,21 @@ int f2fs_fill_dentries(struct dir_context *ctx, struct f2fs_dentry_ptr *d,
 
 		/* check memory boundary before moving forward */
 		bit_pos += GET_DENTRY_SLOTS(le16_to_cpu(de->name_len));
-		if (unlikely(bit_pos > d->max)) {
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"%s: corrupted namelen=%d, run fsck to fix.",
-				__func__, le16_to_cpu(de->name_len));
+		if (unlikely(bit_pos > d->max ||
+				le16_to_cpu(de->name_len) > F2FS_NAME_LEN)) {
+			f2fs_warn(sbi, "%s: corrupted namelen=%d, run fsck to fix.",
+				  __func__, le16_to_cpu(de->name_len));
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
-			err = -EINVAL;
+			err = -EFSCORRUPTED;
 			goto out;
 		}
 
-		if (f2fs_encrypted_inode(d->inode)) {
+		if (IS_ENCRYPTED(d->inode)) {
 			int save_len = fstr->len;
 
 			err = fscrypt_fname_disk_to_usr(d->inode,
-						(u32)de->hash_code, 0,
-						&de_name, fstr);
+						(u32)le32_to_cpu(de->hash_code),
+						0, &de_name, fstr);
 			if (err)
 				goto out;
 
@@ -862,7 +865,7 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx)
 	struct fscrypt_str fstr = FSTR_INIT(NULL, 0);
 	int err = 0;
 
-	if (f2fs_encrypted_inode(inode)) {
+	if (IS_ENCRYPTED(inode)) {
 		err = fscrypt_get_encryption_info(inode);
 		if (err && err != -ENOKEY)
 			goto out;
@@ -891,7 +894,7 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx)
 			page_cache_sync_readahead(inode->i_mapping, ra, file, n,
 				min(npages - n, (pgoff_t)MAX_DIR_RA_PAGES));
 
-		dentry_page = f2fs_get_lock_data_page(inode, n, false);
+		dentry_page = f2fs_find_data_page(inode, n);
 		if (IS_ERR(dentry_page)) {
 			err = PTR_ERR(dentry_page);
 			if (err == -ENOENT) {
@@ -909,11 +912,11 @@ static int f2fs_readdir(struct file *file, struct dir_context *ctx)
 		err = f2fs_fill_dentries(ctx, &d,
 				n * NR_DENTRY_IN_BLOCK, &fstr);
 		if (err) {
-			f2fs_put_page(dentry_page, 1);
+			f2fs_put_page(dentry_page, 0);
 			break;
 		}
 
-		f2fs_put_page(dentry_page, 1);
+		f2fs_put_page(dentry_page, 0);
 	}
 out_free:
 	fscrypt_fname_free_buffer(&fstr);
@@ -924,7 +927,7 @@ out:
 
 static int f2fs_dir_open(struct inode *inode, struct file *filp)
 {
-	if (f2fs_encrypted_inode(inode))
+	if (IS_ENCRYPTED(inode))
 		return fscrypt_get_encryption_info(inode) ? -EACCES : 0;
 	return 0;
 }
diff --git a/fs/f2fs/extent_cache.c b/fs/f2fs/extent_cache.c
index 1cb0fcc67d2d..e60078460ad1 100644
--- a/fs/f2fs/extent_cache.c
+++ b/fs/f2fs/extent_cache.c
@@ -184,10 +184,9 @@ bool f2fs_check_rb_tree_consistence(struct f2fs_sb_info *sbi,
 		next_re = rb_entry(next, struct rb_entry, rb_node);
 
 		if (cur_re->ofs + cur_re->len > next_re->ofs) {
-			f2fs_msg(sbi->sb, KERN_INFO, "inconsistent rbtree, "
-				"cur(%u, %u) next(%u, %u)",
-				cur_re->ofs, cur_re->len,
-				next_re->ofs, next_re->len);
+			f2fs_info(sbi, "inconsistent rbtree, cur(%u, %u) next(%u, %u)",
+				  cur_re->ofs, cur_re->len,
+				  next_re->ofs, next_re->len);
 			return false;
 		}
 
@@ -506,7 +505,7 @@ static void f2fs_update_extent_tree_range(struct inode *inode,
 	unsigned int end = fofs + len;
 	unsigned int pos = (unsigned int)fofs;
 	bool updated = false;
-	bool leftmost;
+	bool leftmost = false;
 
 	if (!et)
 		return;
diff --git a/fs/f2fs/f2fs.h b/fs/f2fs/f2fs.h
index 12fabd6735dd..17382da7f0bd 100644
--- a/fs/f2fs/f2fs.h
+++ b/fs/f2fs/f2fs.h
@@ -24,7 +24,6 @@
 #include <linux/quotaops.h>
 #include <crypto/hash.h>
 
-#define __FS_HAS_ENCRYPTION IS_ENABLED(CONFIG_F2FS_FS_ENCRYPTION)
 #include <linux/fscrypt.h>
 
 #ifdef CONFIG_F2FS_CHECK_FS
@@ -137,6 +136,9 @@ struct f2fs_mount_info {
 	int alloc_mode;			/* segment allocation policy */
 	int fsync_mode;			/* fsync policy */
 	bool test_dummy_encryption;	/* test dummy encryption */
+	block_t unusable_cap;		/* Amount of space allowed to be
+					 * unusable when disabling checkpoint
+					 */
 };
 
 #define F2FS_FEATURE_ENCRYPT		0x0001
@@ -191,6 +193,8 @@ enum {
 #define DEF_CP_INTERVAL			60	/* 60 secs */
 #define DEF_IDLE_INTERVAL		5	/* 5 secs */
 #define DEF_DISABLE_INTERVAL		5	/* 5 secs */
+#define DEF_DISABLE_QUICK_INTERVAL	1	/* 1 secs */
+#define DEF_UMOUNT_DISCARD_TIMEOUT	5	/* 5 secs */
 
 struct cp_control {
 	int reason;
@@ -209,7 +213,14 @@ enum {
 	META_SSA,
 	META_MAX,
 	META_POR,
-	DATA_GENERIC,
+	DATA_GENERIC,		/* check range only */
+	DATA_GENERIC_ENHANCE,	/* strong check on range and segment bitmap */
+	DATA_GENERIC_ENHANCE_READ,	/*
+					 * strong check on range and segment
+					 * bitmap but no warning due to race
+					 * condition of read on truncated area
+					 * by extent_cache
+					 */
 	META_GENERIC,
 };
 
@@ -254,7 +265,7 @@ struct discard_entry {
 /* max discard pend list number */
 #define MAX_PLIST_NUM		512
 #define plist_idx(blk_num)	((blk_num) >= MAX_PLIST_NUM ?		\
-					(MAX_PLIST_NUM - 1) : (blk_num - 1))
+					(MAX_PLIST_NUM - 1) : ((blk_num) - 1))
 
 enum {
 	D_PREP,			/* initial */
@@ -310,6 +321,7 @@ struct discard_policy {
 	bool sync;			/* submit discard with REQ_SYNC flag */
 	bool ordered;			/* issue discard by lba order */
 	unsigned int granularity;	/* discard granularity */
+	int timeout;			/* discard timeout for put_super */
 };
 
 struct discard_cmd_control {
@@ -403,6 +415,7 @@ static inline bool __has_cursum_space(struct f2fs_journal *journal,
 #define F2FS_IOC_SET_PIN_FILE		_IOW(F2FS_IOCTL_MAGIC, 13, __u32)
 #define F2FS_IOC_GET_PIN_FILE		_IOR(F2FS_IOCTL_MAGIC, 14, __u32)
 #define F2FS_IOC_PRECACHE_EXTENTS	_IO(F2FS_IOCTL_MAGIC, 15)
+#define F2FS_IOC_RESIZE_FS		_IOW(F2FS_IOCTL_MAGIC, 16, __u64)
 
 #define F2FS_IOC_SET_ENCRYPTION_POLICY	FS_IOC_SET_ENCRYPTION_POLICY
 #define F2FS_IOC_GET_ENCRYPTION_POLICY	FS_IOC_GET_ENCRYPTION_POLICY
@@ -456,7 +469,6 @@ struct f2fs_flush_device {
 
 /* for inline stuff */
 #define DEF_INLINE_RESERVED_SIZE	1
-#define DEF_MIN_INLINE_SIZE		1
 static inline int get_extra_isize(struct inode *inode);
 static inline int get_inline_xattr_addrs(struct inode *inode);
 #define MAX_INLINE_DATA(inode)	(sizeof(__le32) *			\
@@ -468,8 +480,8 @@ static inline int get_inline_xattr_addrs(struct inode *inode);
 #define NR_INLINE_DENTRY(inode)	(MAX_INLINE_DATA(inode) * BITS_PER_BYTE / \
 				((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
 				BITS_PER_BYTE + 1))
-#define INLINE_DENTRY_BITMAP_SIZE(inode)	((NR_INLINE_DENTRY(inode) + \
-					BITS_PER_BYTE - 1) / BITS_PER_BYTE)
+#define INLINE_DENTRY_BITMAP_SIZE(inode) \
+	DIV_ROUND_UP(NR_INLINE_DENTRY(inode), BITS_PER_BYTE)
 #define INLINE_RESERVED_SIZE(inode)	(MAX_INLINE_DATA(inode) - \
 				((SIZE_OF_DIR_ENTRY + F2FS_SLOT_LEN) * \
 				NR_INLINE_DENTRY(inode) + \
@@ -1040,10 +1052,12 @@ struct f2fs_io_info {
 	bool submitted;		/* indicate IO submission */
 	int need_lock;		/* indicate we need to lock cp_rwsem */
 	bool in_list;		/* indicate fio is in io_list */
-	bool is_meta;		/* indicate borrow meta inode mapping or not */
+	bool is_por;		/* indicate IO is from recovery or not */
 	bool retry;		/* need to reallocate block address */
 	enum iostat_type io_type;	/* io type */
 	struct writeback_control *io_wbc; /* writeback control */
+	struct bio **bio;		/* bio for ipu */
+	sector_t *last_block;		/* last block number in bio */
 	unsigned char version;		/* version of the node */
 };
 
@@ -1067,8 +1081,8 @@ struct f2fs_dev_info {
 	block_t start_blk;
 	block_t end_blk;
 #ifdef CONFIG_BLK_DEV_ZONED
-	unsigned int nr_blkz;			/* Total number of zones */
-	u8 *blkz_type;				/* Array of zones type */
+	unsigned int nr_blkz;		/* Total number of zones */
+	unsigned long *blkz_seq;	/* Bitmap indicating sequential zones */
 #endif
 };
 
@@ -1099,9 +1113,11 @@ enum {
 	SBI_IS_SHUTDOWN,			/* shutdown by ioctl */
 	SBI_IS_RECOVERED,			/* recovered orphan/data */
 	SBI_CP_DISABLED,			/* CP was disabled last mount */
+	SBI_CP_DISABLED_QUICK,			/* CP was disabled quickly */
 	SBI_QUOTA_NEED_FLUSH,			/* need to flush quota info in CP */
 	SBI_QUOTA_SKIP_FLUSH,			/* skip flushing quota in current CP */
 	SBI_QUOTA_NEED_REPAIR,			/* quota file may be corrupted */
+	SBI_IS_RESIZEFS,			/* resizefs is in process */
 };
 
 enum {
@@ -1110,6 +1126,7 @@ enum {
 	DISCARD_TIME,
 	GC_TIME,
 	DISABLE_TIME,
+	UMOUNT_DISCARD_TIMEOUT,
 	MAX_TIME,
 };
 
@@ -1137,7 +1154,7 @@ enum fsync_mode {
 	FSYNC_MODE_NOBARRIER,	/* fsync behaves nobarrier based on posix */
 };
 
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 #define DUMMY_ENCRYPTION_ENABLED(sbi) \
 			(unlikely(F2FS_OPTION(sbi).test_dummy_encryption))
 #else
@@ -1197,6 +1214,7 @@ struct f2fs_sb_info {
 	/* for inode management */
 	struct list_head inode_list[NR_INODE_TYPE];	/* dirty inode list */
 	spinlock_t inode_lock[NR_INODE_TYPE];	/* for dirty inode list lock */
+	struct mutex flush_lock;		/* for flush exclusion */
 
 	/* for extent tree cache */
 	struct radix_tree_root extent_tree_root;/* cache extent cache entries */
@@ -1220,6 +1238,7 @@ struct f2fs_sb_info {
 	unsigned int segs_per_sec;		/* segments per section */
 	unsigned int secs_per_zone;		/* sections per zone */
 	unsigned int total_sections;		/* total section count */
+	struct mutex resize_mutex;		/* for resize exclusion */
 	unsigned int total_node_count;		/* total node block count */
 	unsigned int total_valid_node_count;	/* valid node block count */
 	loff_t max_file_blocks;			/* max block index of file */
@@ -1237,8 +1256,7 @@ struct f2fs_sb_info {
 	block_t unusable_block_count;		/* # of blocks saved by last cp */
 
 	unsigned int nquota_files;		/* # of quota sysfile */
-
-	u32 s_next_generation;			/* for NFS support */
+	struct rw_semaphore quota_sem;		/* blocking cp for flags */
 
 	/* # of pages, see count_type */
 	atomic_t nr_pages[NR_COUNT_TYPE];
@@ -1337,7 +1355,7 @@ struct f2fs_private_dio {
 
 #ifdef CONFIG_F2FS_FAULT_INJECTION
 #define f2fs_show_injection_info(type)					\
-	printk_ratelimited("%sF2FS-fs : inject %s in %s of %pF\n",	\
+	printk_ratelimited("%sF2FS-fs : inject %s in %s of %pS\n",	\
 		KERN_INFO, f2fs_fault_name[type],			\
 		__func__, __builtin_return_address(0))
 static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
@@ -1365,6 +1383,17 @@ static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
 }
 #endif
 
+/*
+ * Test if the mounted volume is a multi-device volume.
+ *   - For a single regular disk volume, sbi->s_ndevs is 0.
+ *   - For a single zoned disk volume, sbi->s_ndevs is 1.
+ *   - For a multi-device volume, sbi->s_ndevs is always 2 or more.
+ */
+static inline bool f2fs_is_multi_device(struct f2fs_sb_info *sbi)
+{
+	return sbi->s_ndevs > 1;
+}
+
 /* For write statistics. Suppose sector size is 512 bytes,
  * and the return value is in kbytes. s is of struct f2fs_sb_info.
  */
@@ -1421,7 +1450,6 @@ static inline u32 __f2fs_crc32(struct f2fs_sb_info *sbi, u32 crc,
 	BUG_ON(crypto_shash_descsize(sbi->s_chksum_driver) != sizeof(desc.ctx));
 
 	desc.shash.tfm = sbi->s_chksum_driver;
-	desc.shash.flags = 0;
 	*(u32 *)desc.ctx = crc;
 
 	err = crypto_shash_update(&desc.shash, address, length);
@@ -1470,7 +1498,7 @@ static inline struct f2fs_sb_info *F2FS_M_SB(struct address_space *mapping)
 
 static inline struct f2fs_sb_info *F2FS_P_SB(struct page *page)
 {
-	return F2FS_M_SB(page->mapping);
+	return F2FS_M_SB(page_file_mapping(page));
 }
 
 static inline struct f2fs_super_block *F2FS_RAW_SUPER(struct f2fs_sb_info *sbi)
@@ -1748,8 +1776,12 @@ static inline int inc_valid_block_count(struct f2fs_sb_info *sbi,
 
 	if (!__allow_reserved_blocks(sbi, inode, true))
 		avail_user_block_count -= F2FS_OPTION(sbi).root_reserved_blocks;
-	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
-		avail_user_block_count -= sbi->unusable_block_count;
+	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
+		if (avail_user_block_count > sbi->unusable_block_count)
+			avail_user_block_count -= sbi->unusable_block_count;
+		else
+			avail_user_block_count = 0;
+	}
 	if (unlikely(sbi->total_valid_block_count > avail_user_block_count)) {
 		diff = sbi->total_valid_block_count - avail_user_block_count;
 		if (diff > *count)
@@ -1777,6 +1809,20 @@ enospc:
 	return -ENOSPC;
 }
 
+__printf(2, 3)
+void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...);
+
+#define f2fs_err(sbi, fmt, ...)						\
+	f2fs_printk(sbi, KERN_ERR fmt, ##__VA_ARGS__)
+#define f2fs_warn(sbi, fmt, ...)					\
+	f2fs_printk(sbi, KERN_WARNING fmt, ##__VA_ARGS__)
+#define f2fs_notice(sbi, fmt, ...)					\
+	f2fs_printk(sbi, KERN_NOTICE fmt, ##__VA_ARGS__)
+#define f2fs_info(sbi, fmt, ...)					\
+	f2fs_printk(sbi, KERN_INFO fmt, ##__VA_ARGS__)
+#define f2fs_debug(sbi, fmt, ...)					\
+	f2fs_printk(sbi, KERN_DEBUG fmt, ##__VA_ARGS__)
+
 static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
 						struct inode *inode,
 						block_t count)
@@ -1785,13 +1831,20 @@ static inline void dec_valid_block_count(struct f2fs_sb_info *sbi,
 
 	spin_lock(&sbi->stat_lock);
 	f2fs_bug_on(sbi, sbi->total_valid_block_count < (block_t) count);
-	f2fs_bug_on(sbi, inode->i_blocks < sectors);
 	sbi->total_valid_block_count -= (block_t)count;
 	if (sbi->reserved_blocks &&
 		sbi->current_reserved_blocks < sbi->reserved_blocks)
 		sbi->current_reserved_blocks = min(sbi->reserved_blocks,
 					sbi->current_reserved_blocks + count);
 	spin_unlock(&sbi->stat_lock);
+	if (unlikely(inode->i_blocks < sectors)) {
+		f2fs_warn(sbi, "Inconsistent i_blocks, ino:%lu, iblocks:%llu, sectors:%llu",
+			  inode->i_ino,
+			  (unsigned long long)inode->i_blocks,
+			  (unsigned long long)sectors);
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		return;
+	}
 	f2fs_i_blocks_write(inode, count, false, true);
 }
 
@@ -1799,13 +1852,12 @@ static inline void inc_page_count(struct f2fs_sb_info *sbi, int count_type)
 {
 	atomic_inc(&sbi->nr_pages[count_type]);
 
-	if (count_type == F2FS_DIRTY_DATA || count_type == F2FS_INMEM_PAGES ||
-		count_type == F2FS_WB_CP_DATA || count_type == F2FS_WB_DATA ||
-		count_type == F2FS_RD_DATA || count_type == F2FS_RD_NODE ||
-		count_type == F2FS_RD_META)
-		return;
-
-	set_sbi_flag(sbi, SBI_IS_DIRTY);
+	if (count_type == F2FS_DIRTY_DENTS ||
+			count_type == F2FS_DIRTY_NODES ||
+			count_type == F2FS_DIRTY_META ||
+			count_type == F2FS_DIRTY_QDATA ||
+			count_type == F2FS_DIRTY_IMETA)
+		set_sbi_flag(sbi, SBI_IS_DIRTY);
 }
 
 static inline void inode_inc_dirty_pages(struct inode *inode)
@@ -1890,7 +1942,11 @@ static inline void *__bitmap_ptr(struct f2fs_sb_info *sbi, int flag)
 	if (is_set_ckpt_flags(sbi, CP_LARGE_NAT_BITMAP_FLAG)) {
 		offset = (flag == SIT_BITMAP) ?
 			le32_to_cpu(ckpt->nat_ver_bitmap_bytesize) : 0;
-		return &ckpt->sit_nat_version_bitmap + offset;
+		/*
+		 * if large_nat_bitmap feature is enabled, leave checksum
+		 * protection for all nat/sit bitmaps.
+		 */
+		return &ckpt->sit_nat_version_bitmap + offset + sizeof(__le32);
 	}
 
 	if (__cp_payload(sbi) > 0) {
@@ -1937,7 +1993,7 @@ static inline int inc_valid_node_count(struct f2fs_sb_info *sbi,
 					struct inode *inode, bool is_inode)
 {
 	block_t	valid_block_count;
-	unsigned int valid_node_count;
+	unsigned int valid_node_count, user_block_count;
 	int err;
 
 	if (is_inode) {
@@ -1964,10 +2020,11 @@ static inline int inc_valid_node_count(struct f2fs_sb_info *sbi,
 
 	if (!__allow_reserved_blocks(sbi, inode, false))
 		valid_block_count += F2FS_OPTION(sbi).root_reserved_blocks;
+	user_block_count = sbi->user_block_count;
 	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED)))
-		valid_block_count += sbi->unusable_block_count;
+		user_block_count -= sbi->unusable_block_count;
 
-	if (unlikely(valid_block_count > sbi->user_block_count)) {
+	if (unlikely(valid_block_count > user_block_count)) {
 		spin_unlock(&sbi->stat_lock);
 		goto enospc;
 	}
@@ -2009,7 +2066,6 @@ static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
 
 	f2fs_bug_on(sbi, !sbi->total_valid_block_count);
 	f2fs_bug_on(sbi, !sbi->total_valid_node_count);
-	f2fs_bug_on(sbi, !is_inode && !inode->i_blocks);
 
 	sbi->total_valid_node_count--;
 	sbi->total_valid_block_count--;
@@ -2019,10 +2075,18 @@ static inline void dec_valid_node_count(struct f2fs_sb_info *sbi,
 
 	spin_unlock(&sbi->stat_lock);
 
-	if (is_inode)
+	if (is_inode) {
 		dquot_free_inode(inode);
-	else
+	} else {
+		if (unlikely(inode->i_blocks == 0)) {
+			f2fs_warn(sbi, "Inconsistent i_blocks, ino:%lu, iblocks:%llu",
+				  inode->i_ino,
+				  (unsigned long long)inode->i_blocks);
+			set_sbi_flag(sbi, SBI_NEED_FSCK);
+			return;
+		}
 		f2fs_i_blocks_write(inode, 1, false, true);
+	}
 }
 
 static inline unsigned int valid_node_count(struct f2fs_sb_info *sbi)
@@ -2153,14 +2217,24 @@ static inline struct bio *f2fs_bio_alloc(struct f2fs_sb_info *sbi,
 
 static inline bool is_idle(struct f2fs_sb_info *sbi, int type)
 {
+	if (sbi->gc_mode == GC_URGENT)
+		return true;
+
 	if (get_pages(sbi, F2FS_RD_DATA) || get_pages(sbi, F2FS_RD_NODE) ||
 		get_pages(sbi, F2FS_RD_META) || get_pages(sbi, F2FS_WB_DATA) ||
 		get_pages(sbi, F2FS_WB_CP_DATA) ||
 		get_pages(sbi, F2FS_DIO_READ) ||
-		get_pages(sbi, F2FS_DIO_WRITE) ||
-		atomic_read(&SM_I(sbi)->dcc_info->queued_discard) ||
-		atomic_read(&SM_I(sbi)->fcc_info->queued_flush))
+		get_pages(sbi, F2FS_DIO_WRITE))
+		return false;
+
+	if (type != DISCARD_TIME && SM_I(sbi) && SM_I(sbi)->dcc_info &&
+			atomic_read(&SM_I(sbi)->dcc_info->queued_discard))
+		return false;
+
+	if (SM_I(sbi) && SM_I(sbi)->fcc_info &&
+			atomic_read(&SM_I(sbi)->fcc_info->queued_flush))
 		return false;
+
 	return f2fs_time_over(sbi, type);
 }
 
@@ -2275,56 +2349,23 @@ static inline void f2fs_change_bit(unsigned int nr, char *addr)
 }
 
 /*
- * Inode flags
+ * On-disk inode flags (f2fs_inode::i_flags)
  */
-#define F2FS_SECRM_FL			0x00000001 /* Secure deletion */
-#define F2FS_UNRM_FL			0x00000002 /* Undelete */
-#define F2FS_COMPR_FL			0x00000004 /* Compress file */
 #define F2FS_SYNC_FL			0x00000008 /* Synchronous updates */
 #define F2FS_IMMUTABLE_FL		0x00000010 /* Immutable file */
 #define F2FS_APPEND_FL			0x00000020 /* writes to file may only append */
 #define F2FS_NODUMP_FL			0x00000040 /* do not dump file */
 #define F2FS_NOATIME_FL			0x00000080 /* do not update atime */
-/* Reserved for compression usage... */
-#define F2FS_DIRTY_FL			0x00000100
-#define F2FS_COMPRBLK_FL		0x00000200 /* One or more compressed clusters */
-#define F2FS_NOCOMPR_FL			0x00000400 /* Don't compress */
-#define F2FS_ENCRYPT_FL			0x00000800 /* encrypted file */
-/* End compression flags --- maybe not all used */
 #define F2FS_INDEX_FL			0x00001000 /* hash-indexed directory */
-#define F2FS_IMAGIC_FL			0x00002000 /* AFS directory */
-#define F2FS_JOURNAL_DATA_FL		0x00004000 /* file data should be journaled */
-#define F2FS_NOTAIL_FL			0x00008000 /* file tail should not be merged */
 #define F2FS_DIRSYNC_FL			0x00010000 /* dirsync behaviour (directories only) */
-#define F2FS_TOPDIR_FL			0x00020000 /* Top of directory hierarchies*/
-#define F2FS_HUGE_FILE_FL               0x00040000 /* Set to each huge file */
-#define F2FS_EXTENTS_FL			0x00080000 /* Inode uses extents */
-#define F2FS_EA_INODE_FL	        0x00200000 /* Inode used for large EA */
-#define F2FS_EOFBLOCKS_FL		0x00400000 /* Blocks allocated beyond EOF */
-#define F2FS_INLINE_DATA_FL		0x10000000 /* Inode has inline data. */
 #define F2FS_PROJINHERIT_FL		0x20000000 /* Create with parents projid */
-#define F2FS_RESERVED_FL		0x80000000 /* reserved for ext4 lib */
-
-#define F2FS_FL_USER_VISIBLE		0x304BDFFF /* User visible flags */
-#define F2FS_FL_USER_MODIFIABLE		0x204BC0FF /* User modifiable flags */
-
-/* Flags we can manipulate with through F2FS_IOC_FSSETXATTR */
-#define F2FS_FL_XFLAG_VISIBLE		(F2FS_SYNC_FL | \
-					 F2FS_IMMUTABLE_FL | \
-					 F2FS_APPEND_FL | \
-					 F2FS_NODUMP_FL | \
-					 F2FS_NOATIME_FL | \
-					 F2FS_PROJINHERIT_FL)
 
 /* Flags that should be inherited by new inodes from their parent. */
-#define F2FS_FL_INHERITED (F2FS_SECRM_FL | F2FS_UNRM_FL | F2FS_COMPR_FL |\
-			   F2FS_SYNC_FL | F2FS_NODUMP_FL | F2FS_NOATIME_FL |\
-			   F2FS_NOCOMPR_FL | F2FS_JOURNAL_DATA_FL |\
-			   F2FS_NOTAIL_FL | F2FS_DIRSYNC_FL |\
-			   F2FS_PROJINHERIT_FL)
+#define F2FS_FL_INHERITED (F2FS_SYNC_FL | F2FS_NODUMP_FL | F2FS_NOATIME_FL | \
+			   F2FS_DIRSYNC_FL | F2FS_PROJINHERIT_FL)
 
 /* Flags that are appropriate for regular files (all but dir-specific ones). */
-#define F2FS_REG_FLMASK		(~(F2FS_DIRSYNC_FL | F2FS_TOPDIR_FL))
+#define F2FS_REG_FLMASK		(~(F2FS_DIRSYNC_FL | F2FS_PROJINHERIT_FL))
 
 /* Flags that are appropriate for non-directories/regular files. */
 #define F2FS_OTHER_FLMASK	(F2FS_NODUMP_FL | F2FS_NOATIME_FL)
@@ -2538,7 +2579,14 @@ static inline int f2fs_has_inline_xattr(struct inode *inode)
 
 static inline unsigned int addrs_per_inode(struct inode *inode)
 {
-	return CUR_ADDRS_PER_INODE(inode) - get_inline_xattr_addrs(inode);
+	unsigned int addrs = CUR_ADDRS_PER_INODE(inode) -
+				get_inline_xattr_addrs(inode);
+	return ALIGN_DOWN(addrs, 1);
+}
+
+static inline unsigned int addrs_per_block(struct inode *inode)
+{
+	return ALIGN_DOWN(DEF_ADDRS_PER_BLOCK, 1);
 }
 
 static inline void *inline_xattr_addr(struct inode *inode, struct page *page)
@@ -2551,7 +2599,9 @@ static inline void *inline_xattr_addr(struct inode *inode, struct page *page)
 
 static inline int inline_xattr_size(struct inode *inode)
 {
-	return get_inline_xattr_addrs(inode) * sizeof(__le32);
+	if (f2fs_has_inline_xattr(inode))
+		return get_inline_xattr_addrs(inode) * sizeof(__le32);
+	return 0;
 }
 
 static inline int f2fs_has_inline_data(struct inode *inode)
@@ -2762,9 +2812,9 @@ static inline int get_inline_xattr_addrs(struct inode *inode)
 
 #define F2FS_OLD_ATTRIBUTE_SIZE	(offsetof(struct f2fs_inode, i_addr))
 #define F2FS_FITS_IN_INODE(f2fs_inode, extra_isize, field)		\
-		((offsetof(typeof(*f2fs_inode), field) +	\
+		((offsetof(typeof(*(f2fs_inode)), field) +	\
 		sizeof((f2fs_inode)->field))			\
-		<= (F2FS_OLD_ATTRIBUTE_SIZE + extra_isize))	\
+		<= (F2FS_OLD_ATTRIBUTE_SIZE + (extra_isize)))	\
 
 static inline void f2fs_reset_iostat(struct f2fs_sb_info *sbi)
 {
@@ -2793,19 +2843,16 @@ static inline void f2fs_update_iostat(struct f2fs_sb_info *sbi,
 
 #define __is_large_section(sbi)		((sbi)->segs_per_sec > 1)
 
-#define __is_meta_io(fio) (PAGE_TYPE_OF_BIO(fio->type) == META &&	\
-				(!is_read_io(fio->op) || fio->is_meta))
+#define __is_meta_io(fio) (PAGE_TYPE_OF_BIO((fio)->type) == META)
 
 bool f2fs_is_valid_blkaddr(struct f2fs_sb_info *sbi,
 					block_t blkaddr, int type);
-void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...);
 static inline void verify_blkaddr(struct f2fs_sb_info *sbi,
 					block_t blkaddr, int type)
 {
 	if (!f2fs_is_valid_blkaddr(sbi, blkaddr, type)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"invalid blkaddr: %u, type: %d, run fsck to fix.",
-			blkaddr, type);
+		f2fs_err(sbi, "invalid blkaddr: %u, type: %d, run fsck to fix.",
+			 blkaddr, type);
 		f2fs_bug_on(sbi, 1);
 	}
 }
@@ -2817,13 +2864,25 @@ static inline bool __is_valid_data_blkaddr(block_t blkaddr)
 	return true;
 }
 
-static inline bool is_valid_data_blkaddr(struct f2fs_sb_info *sbi,
-						block_t blkaddr)
+static inline void f2fs_set_page_private(struct page *page,
+						unsigned long data)
 {
-	if (!__is_valid_data_blkaddr(blkaddr))
-		return false;
-	verify_blkaddr(sbi, blkaddr, DATA_GENERIC);
-	return true;
+	if (PagePrivate(page))
+		return;
+
+	get_page(page);
+	SetPagePrivate(page);
+	set_page_private(page, data);
+}
+
+static inline void f2fs_clear_page_private(struct page *page)
+{
+	if (!PagePrivate(page))
+		return;
+
+	set_page_private(page, 0);
+	ClearPagePrivate(page);
+	f2fs_put_page(page, 0);
 }
 
 /*
@@ -2831,8 +2890,7 @@ static inline bool is_valid_data_blkaddr(struct f2fs_sb_info *sbi,
  */
 int f2fs_sync_file(struct file *file, loff_t start, loff_t end, int datasync);
 void f2fs_truncate_data_blocks(struct dnode_of_data *dn);
-int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock,
-							bool buf_write);
+int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock);
 int f2fs_truncate(struct inode *inode);
 int f2fs_getattr(const struct path *path, struct kstat *stat,
 			u32 request_mask, unsigned int flags);
@@ -2925,8 +2983,6 @@ int f2fs_quota_sync(struct super_block *sb, int type);
 void f2fs_quota_off_umount(struct super_block *sb);
 int f2fs_commit_super(struct f2fs_sb_info *sbi, bool recover);
 int f2fs_sync_fs(struct super_block *sb, int sync);
-extern __printf(3, 4)
-void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...);
 int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi);
 
 /*
@@ -3006,13 +3062,16 @@ void f2fs_invalidate_blocks(struct f2fs_sb_info *sbi, block_t addr);
 bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr);
 void f2fs_drop_discard_cmd(struct f2fs_sb_info *sbi);
 void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi);
-bool f2fs_wait_discard_bios(struct f2fs_sb_info *sbi);
+bool f2fs_issue_discard_timeout(struct f2fs_sb_info *sbi);
 void f2fs_clear_prefree_segments(struct f2fs_sb_info *sbi,
 					struct cp_control *cpc);
 void f2fs_dirty_to_prefree(struct f2fs_sb_info *sbi);
-int f2fs_disable_cp_again(struct f2fs_sb_info *sbi);
+block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi);
+int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable);
 void f2fs_release_discard_addrs(struct f2fs_sb_info *sbi);
 int f2fs_npages_for_summary_flush(struct f2fs_sb_info *sbi, bool for_ra);
+void allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
+					unsigned int start, unsigned int end);
 void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi);
 int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range);
 bool f2fs_exist_trim_candidates(struct f2fs_sb_info *sbi,
@@ -3105,6 +3164,7 @@ void f2fs_submit_merged_write_cond(struct f2fs_sb_info *sbi,
 				nid_t ino, enum page_type type);
 void f2fs_flush_merged_writes(struct f2fs_sb_info *sbi);
 int f2fs_submit_page_bio(struct f2fs_io_info *fio);
+int f2fs_merge_page_bio(struct f2fs_io_info *fio);
 void f2fs_submit_page_write(struct f2fs_io_info *fio);
 struct block_device *f2fs_target_device(struct f2fs_sb_info *sbi,
 			block_t blk_addr, struct bio *bio);
@@ -3150,6 +3210,7 @@ block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode);
 int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool background,
 			unsigned int segno);
 void f2fs_build_gc_manager(struct f2fs_sb_info *sbi);
+int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count);
 
 /*
  * recovery.c
@@ -3328,7 +3389,7 @@ static inline struct f2fs_stat_info *F2FS_STAT(struct f2fs_sb_info *sbi)
 
 int f2fs_build_stats(struct f2fs_sb_info *sbi);
 void f2fs_destroy_stats(struct f2fs_sb_info *sbi);
-int __init f2fs_create_root_stats(void);
+void __init f2fs_create_root_stats(void);
 void f2fs_destroy_root_stats(void);
 #else
 #define stat_inc_cp_count(si)				do { } while (0)
@@ -3366,7 +3427,7 @@ void f2fs_destroy_root_stats(void);
 
 static inline int f2fs_build_stats(struct f2fs_sb_info *sbi) { return 0; }
 static inline void f2fs_destroy_stats(struct f2fs_sb_info *sbi) { }
-static inline int __init f2fs_create_root_stats(void) { return 0; }
+static inline void __init f2fs_create_root_stats(void) { }
 static inline void f2fs_destroy_root_stats(void) { }
 #endif
 
@@ -3463,19 +3524,14 @@ void f2fs_unregister_sysfs(struct f2fs_sb_info *sbi);
 /*
  * crypto support
  */
-static inline bool f2fs_encrypted_inode(struct inode *inode)
-{
-	return file_is_encrypt(inode);
-}
-
 static inline bool f2fs_encrypted_file(struct inode *inode)
 {
-	return f2fs_encrypted_inode(inode) && S_ISREG(inode->i_mode);
+	return IS_ENCRYPTED(inode) && S_ISREG(inode->i_mode);
 }
 
 static inline void f2fs_set_encrypted_inode(struct inode *inode)
 {
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	file_set_encrypt(inode);
 	f2fs_set_inode_flags(inode);
 #endif
@@ -3508,16 +3564,12 @@ F2FS_FEATURE_FUNCS(lost_found, LOST_FOUND);
 F2FS_FEATURE_FUNCS(sb_chksum, SB_CHKSUM);
 
 #ifdef CONFIG_BLK_DEV_ZONED
-static inline int get_blkz_type(struct f2fs_sb_info *sbi,
-			struct block_device *bdev, block_t blkaddr)
+static inline bool f2fs_blkz_is_seq(struct f2fs_sb_info *sbi, int devi,
+				    block_t blkaddr)
 {
 	unsigned int zno = blkaddr >> sbi->log_blocks_per_blkz;
-	int i;
 
-	for (i = 0; i < sbi->s_ndevs; i++)
-		if (FDEV(i).bdev == bdev)
-			return FDEV(i).blkz_type[zno];
-	return -EINVAL;
+	return test_bit(zno, FDEV(devi).blkz_seq);
 }
 #endif
 
@@ -3526,9 +3578,23 @@ static inline bool f2fs_hw_should_discard(struct f2fs_sb_info *sbi)
 	return f2fs_sb_has_blkzoned(sbi);
 }
 
+static inline bool f2fs_bdev_support_discard(struct block_device *bdev)
+{
+	return blk_queue_discard(bdev_get_queue(bdev)) ||
+	       bdev_is_zoned(bdev);
+}
+
 static inline bool f2fs_hw_support_discard(struct f2fs_sb_info *sbi)
 {
-	return blk_queue_discard(bdev_get_queue(sbi->sb->s_bdev));
+	int i;
+
+	if (!f2fs_is_multi_device(sbi))
+		return f2fs_bdev_support_discard(sbi->sb->s_bdev);
+
+	for (i = 0; i < sbi->s_ndevs; i++)
+		if (f2fs_bdev_support_discard(FDEV(i).bdev))
+			return true;
+	return false;
 }
 
 static inline bool f2fs_realtime_discard_enable(struct f2fs_sb_info *sbi)
@@ -3537,6 +3603,20 @@ static inline bool f2fs_realtime_discard_enable(struct f2fs_sb_info *sbi)
 					f2fs_hw_should_discard(sbi);
 }
 
+static inline bool f2fs_hw_is_readonly(struct f2fs_sb_info *sbi)
+{
+	int i;
+
+	if (!f2fs_is_multi_device(sbi))
+		return bdev_read_only(sbi->sb->s_bdev);
+
+	for (i = 0; i < sbi->s_ndevs; i++)
+		if (bdev_read_only(FDEV(i).bdev))
+			return true;
+	return false;
+}
+
+
 static inline void set_opt_mode(struct f2fs_sb_info *sbi, unsigned int mt)
 {
 	clear_opt(sbi, ADAPTIVE);
@@ -3554,7 +3634,7 @@ static inline void set_opt_mode(struct f2fs_sb_info *sbi, unsigned int mt)
 
 static inline bool f2fs_may_encrypt(struct inode *inode)
 {
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	umode_t mode = inode->i_mode;
 
 	return (S_ISREG(mode) || S_ISDIR(mode) || S_ISLNK(mode));
@@ -3592,7 +3672,7 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
 
 	if (f2fs_post_read_required(inode))
 		return true;
-	if (sbi->s_ndevs)
+	if (f2fs_is_multi_device(sbi))
 		return true;
 	/*
 	 * for blkzoned device, fallback direct IO to buffered IO, so
@@ -3603,7 +3683,8 @@ static inline bool f2fs_force_buffered_io(struct inode *inode,
 	if (test_opt(sbi, LFS) && (rw == WRITE) &&
 				block_unaligned_IO(inode, iocb, iter))
 		return true;
-	if (is_sbi_flag_set(F2FS_I_SB(inode), SBI_CP_DISABLED))
+	if (is_sbi_flag_set(F2FS_I_SB(inode), SBI_CP_DISABLED) &&
+					!(inode->i_flags & S_SWAPFILE))
 		return true;
 
 	return false;
@@ -3616,8 +3697,6 @@ extern void f2fs_build_fault_attr(struct f2fs_sb_info *sbi, unsigned int rate,
 #define f2fs_build_fault_attr(sbi, rate, type)		do { } while (0)
 #endif
 
-#endif
-
 static inline bool is_journalled_quota(struct f2fs_sb_info *sbi)
 {
 #ifdef CONFIG_QUOTA
@@ -3630,3 +3709,8 @@ static inline bool is_journalled_quota(struct f2fs_sb_info *sbi)
 #endif
 	return false;
 }
+
+#define EFSBADCRC	EBADMSG		/* Bad CRC detected */
+#define EFSCORRUPTED	EUCLEAN		/* Filesystem is corrupted */
+
+#endif /* _LINUX_F2FS_H */
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index bba56b39dcc5..f8d46df8fa9e 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -39,6 +39,8 @@ static vm_fault_t f2fs_filemap_fault(struct vm_fault *vmf)
 	ret = filemap_fault(vmf);
 	up_read(&F2FS_I(inode)->i_mmap_sem);
 
+	trace_f2fs_filemap_fault(inode, vmf->pgoff, (unsigned long)ret);
+
 	return ret;
 }
 
@@ -356,7 +358,7 @@ static bool __found_offset(struct f2fs_sb_info *sbi, block_t blkaddr,
 	switch (whence) {
 	case SEEK_DATA:
 		if ((blkaddr == NEW_ADDR && dirty == pgofs) ||
-			is_valid_data_blkaddr(sbi, blkaddr))
+			__is_valid_data_blkaddr(blkaddr))
 			return true;
 		break;
 	case SEEK_HOLE:
@@ -422,7 +424,7 @@ static loff_t f2fs_seek_block(struct file *file, loff_t offset, int whence)
 
 			if (__is_valid_data_blkaddr(blkaddr) &&
 				!f2fs_is_valid_blkaddr(F2FS_I_SB(inode),
-						blkaddr, DATA_GENERIC)) {
+					blkaddr, DATA_GENERIC_ENHANCE)) {
 				f2fs_put_dnode(&dn);
 				goto fail;
 			}
@@ -523,7 +525,8 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
 		f2fs_set_data_blkaddr(dn);
 
 		if (__is_valid_data_blkaddr(blkaddr) &&
-			!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC))
+			!f2fs_is_valid_blkaddr(sbi, blkaddr,
+					DATA_GENERIC_ENHANCE))
 			continue;
 
 		f2fs_invalidate_blocks(sbi, blkaddr);
@@ -552,7 +555,7 @@ void f2fs_truncate_data_blocks_range(struct dnode_of_data *dn, int count)
 
 void f2fs_truncate_data_blocks(struct dnode_of_data *dn)
 {
-	f2fs_truncate_data_blocks_range(dn, ADDRS_PER_BLOCK);
+	f2fs_truncate_data_blocks_range(dn, ADDRS_PER_BLOCK(dn->inode));
 }
 
 static int truncate_partial_data_page(struct inode *inode, u64 from,
@@ -582,15 +585,14 @@ truncate_out:
 	zero_user(page, offset, PAGE_SIZE - offset);
 
 	/* An encrypted inode should have a key and truncate the last page. */
-	f2fs_bug_on(F2FS_I_SB(inode), cache_only && f2fs_encrypted_inode(inode));
+	f2fs_bug_on(F2FS_I_SB(inode), cache_only && IS_ENCRYPTED(inode));
 	if (!cache_only)
 		set_page_dirty(page);
 	f2fs_put_page(page, 1);
 	return 0;
 }
 
-int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock,
-							bool buf_write)
+int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct dnode_of_data dn;
@@ -598,7 +600,6 @@ int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock,
 	int count = 0, err = 0;
 	struct page *ipage;
 	bool truncate_page = false;
-	int flag = buf_write ? F2FS_GET_BLOCK_PRE_AIO : F2FS_GET_BLOCK_PRE_DIO;
 
 	trace_f2fs_truncate_blocks_enter(inode, from);
 
@@ -608,7 +609,7 @@ int f2fs_truncate_blocks(struct inode *inode, u64 from, bool lock,
 		goto free_partial;
 
 	if (lock)
-		__do_map_lock(sbi, flag, true);
+		f2fs_lock_op(sbi);
 
 	ipage = f2fs_get_node_page(sbi, inode->i_ino);
 	if (IS_ERR(ipage)) {
@@ -646,7 +647,7 @@ free_next:
 	err = f2fs_truncate_inode_blocks(inode, free_from);
 out:
 	if (lock)
-		__do_map_lock(sbi, flag, false);
+		f2fs_unlock_op(sbi);
 free_partial:
 	/* lastly zero out the first data page */
 	if (!err)
@@ -681,7 +682,7 @@ int f2fs_truncate(struct inode *inode)
 			return err;
 	}
 
-	err = f2fs_truncate_blocks(inode, i_size_read(inode), true, false);
+	err = f2fs_truncate_blocks(inode, i_size_read(inode), true);
 	if (err)
 		return err;
 
@@ -706,12 +707,10 @@ int f2fs_getattr(const struct path *path, struct kstat *stat,
 		stat->btime.tv_nsec = fi->i_crtime.tv_nsec;
 	}
 
-	flags = fi->i_flags & F2FS_FL_USER_VISIBLE;
+	flags = fi->i_flags;
 	if (flags & F2FS_APPEND_FL)
 		stat->attributes |= STATX_ATTR_APPEND;
-	if (flags & F2FS_COMPR_FL)
-		stat->attributes |= STATX_ATTR_COMPRESSED;
-	if (f2fs_encrypted_inode(inode))
+	if (IS_ENCRYPTED(inode))
 		stat->attributes |= STATX_ATTR_ENCRYPTED;
 	if (flags & F2FS_IMMUTABLE_FL)
 		stat->attributes |= STATX_ATTR_IMMUTABLE;
@@ -719,7 +718,6 @@ int f2fs_getattr(const struct path *path, struct kstat *stat,
 		stat->attributes |= STATX_ATTR_NODUMP;
 
 	stat->attributes_mask |= (STATX_ATTR_APPEND |
-				  STATX_ATTR_COMPRESSED |
 				  STATX_ATTR_ENCRYPTED |
 				  STATX_ATTR_IMMUTABLE |
 				  STATX_ATTR_NODUMP);
@@ -768,7 +766,6 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 {
 	struct inode *inode = d_inode(dentry);
 	int err;
-	bool size_changed = false;
 
 	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
 		return -EIO;
@@ -843,8 +840,6 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 		down_write(&F2FS_I(inode)->i_sem);
 		F2FS_I(inode)->last_disk_size = i_size_read(inode);
 		up_write(&F2FS_I(inode)->i_sem);
-
-		size_changed = true;
 	}
 
 	__setattr_copy(inode, attr);
@@ -858,7 +853,7 @@ int f2fs_setattr(struct dentry *dentry, struct iattr *attr)
 	}
 
 	/* file size may changed here */
-	f2fs_mark_inode_dirty_sync(inode, size_changed);
+	f2fs_mark_inode_dirty_sync(inode, true);
 
 	/* inode change will produce dirty node pages flushed by checkpoint */
 	f2fs_balance_fs(F2FS_I_SB(inode), true);
@@ -1011,7 +1006,8 @@ next_dnode:
 	} else if (ret == -ENOENT) {
 		if (dn.max_level == 0)
 			return -ENOENT;
-		done = min((pgoff_t)ADDRS_PER_BLOCK - dn.ofs_in_node, len);
+		done = min((pgoff_t)ADDRS_PER_BLOCK(inode) - dn.ofs_in_node,
+									len);
 		blkaddr += done;
 		do_replace += done;
 		goto next;
@@ -1022,6 +1018,14 @@ next_dnode:
 	for (i = 0; i < done; i++, blkaddr++, do_replace++, dn.ofs_in_node++) {
 		*blkaddr = datablock_addr(dn.inode,
 					dn.node_page, dn.ofs_in_node);
+
+		if (__is_valid_data_blkaddr(*blkaddr) &&
+			!f2fs_is_valid_blkaddr(sbi, *blkaddr,
+					DATA_GENERIC_ENHANCE)) {
+			f2fs_put_dnode(&dn);
+			return -EFSCORRUPTED;
+		}
+
 		if (!f2fs_is_checkpointed_data(sbi, *blkaddr)) {
 
 			if (test_opt(sbi, LFS)) {
@@ -1162,7 +1166,7 @@ static int __exchange_data_block(struct inode *src_inode,
 	int ret;
 
 	while (len) {
-		olen = min((pgoff_t)4 * ADDRS_PER_BLOCK, len);
+		olen = min((pgoff_t)4 * ADDRS_PER_BLOCK(src_inode), len);
 
 		src_blkaddr = f2fs_kvzalloc(F2FS_I_SB(src_inode),
 					array_size(olen, sizeof(block_t)),
@@ -1207,7 +1211,7 @@ roll_back:
 static int f2fs_do_collapse(struct inode *inode, loff_t offset, loff_t len)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
-	pgoff_t nrpages = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
+	pgoff_t nrpages = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 	pgoff_t start = offset >> PAGE_SHIFT;
 	pgoff_t end = (offset + len) >> PAGE_SHIFT;
 	int ret;
@@ -1262,7 +1266,7 @@ static int f2fs_collapse_range(struct inode *inode, loff_t offset, loff_t len)
 	new_size = i_size_read(inode) - len;
 	truncate_pagecache(inode, new_size);
 
-	ret = f2fs_truncate_blocks(inode, new_size, true, false);
+	ret = f2fs_truncate_blocks(inode, new_size, true);
 	up_write(&F2FS_I(inode)->i_mmap_sem);
 	if (!ret)
 		f2fs_i_size_write(inode, new_size);
@@ -1447,7 +1451,7 @@ static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
 	f2fs_balance_fs(sbi, true);
 
 	down_write(&F2FS_I(inode)->i_mmap_sem);
-	ret = f2fs_truncate_blocks(inode, i_size_read(inode), true, false);
+	ret = f2fs_truncate_blocks(inode, i_size_read(inode), true);
 	up_write(&F2FS_I(inode)->i_mmap_sem);
 	if (ret)
 		return ret;
@@ -1460,7 +1464,7 @@ static int f2fs_insert_range(struct inode *inode, loff_t offset, loff_t len)
 	pg_start = offset >> PAGE_SHIFT;
 	pg_end = (offset + len) >> PAGE_SHIFT;
 	delta = pg_end - pg_start;
-	idx = (i_size_read(inode) + PAGE_SIZE - 1) / PAGE_SIZE;
+	idx = DIV_ROUND_UP(i_size_read(inode), PAGE_SIZE);
 
 	/* avoid gc operation during block exchange */
 	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
@@ -1524,7 +1528,12 @@ static int expand_inode_data(struct inode *inode, loff_t offset,
 	if (off_end)
 		map.m_len++;
 
-	err = f2fs_map_blocks(inode, &map, 1, F2FS_GET_BLOCK_PRE_AIO);
+	if (f2fs_is_pinned_file(inode))
+		map.m_seg_type = CURSEG_COLD_DATA;
+
+	err = f2fs_map_blocks(inode, &map, 1, (f2fs_is_pinned_file(inode) ?
+						F2FS_GET_BLOCK_PRE_DIO :
+						F2FS_GET_BLOCK_PRE_AIO));
 	if (err) {
 		pgoff_t last_off;
 
@@ -1563,7 +1572,7 @@ static long f2fs_fallocate(struct file *file, int mode,
 	if (!S_ISREG(inode->i_mode))
 		return -EINVAL;
 
-	if (f2fs_encrypted_inode(inode) &&
+	if (IS_ENCRYPTED(inode) &&
 		(mode & (FALLOC_FL_COLLAPSE_RANGE | FALLOC_FL_INSERT_RANGE)))
 		return -EOPNOTSUPP;
 
@@ -1641,42 +1650,22 @@ static int f2fs_file_flush(struct file *file, fl_owner_t id)
 	return 0;
 }
 
-static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
-{
-	struct inode *inode = file_inode(filp);
-	struct f2fs_inode_info *fi = F2FS_I(inode);
-	unsigned int flags = fi->i_flags;
-
-	if (f2fs_encrypted_inode(inode))
-		flags |= F2FS_ENCRYPT_FL;
-	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
-		flags |= F2FS_INLINE_DATA_FL;
-
-	flags &= F2FS_FL_USER_VISIBLE;
-
-	return put_user(flags, (int __user *)arg);
-}
-
-static int __f2fs_ioc_setflags(struct inode *inode, unsigned int flags)
+static int f2fs_setflags_common(struct inode *inode, u32 iflags, u32 mask)
 {
 	struct f2fs_inode_info *fi = F2FS_I(inode);
-	unsigned int oldflags;
+	u32 oldflags;
 
 	/* Is it quota file? Do not allow user to mess with it */
 	if (IS_NOQUOTA(inode))
 		return -EPERM;
 
-	flags = f2fs_mask_flags(inode->i_mode, flags);
-
 	oldflags = fi->i_flags;
 
-	if ((flags ^ oldflags) & (F2FS_APPEND_FL | F2FS_IMMUTABLE_FL))
+	if ((iflags ^ oldflags) & (F2FS_APPEND_FL | F2FS_IMMUTABLE_FL))
 		if (!capable(CAP_LINUX_IMMUTABLE))
 			return -EPERM;
 
-	flags = flags & F2FS_FL_USER_MODIFIABLE;
-	flags |= oldflags & ~F2FS_FL_USER_MODIFIABLE;
-	fi->i_flags = flags;
+	fi->i_flags = iflags | (oldflags & ~mask);
 
 	if (fi->i_flags & F2FS_PROJINHERIT_FL)
 		set_inode_flag(inode, FI_PROJ_INHERIT);
@@ -1689,26 +1678,124 @@ static int __f2fs_ioc_setflags(struct inode *inode, unsigned int flags)
 	return 0;
 }
 
+/* FS_IOC_GETFLAGS and FS_IOC_SETFLAGS support */
+
+/*
+ * To make a new on-disk f2fs i_flag gettable via FS_IOC_GETFLAGS, add an entry
+ * for it to f2fs_fsflags_map[], and add its FS_*_FL equivalent to
+ * F2FS_GETTABLE_FS_FL.  To also make it settable via FS_IOC_SETFLAGS, also add
+ * its FS_*_FL equivalent to F2FS_SETTABLE_FS_FL.
+ */
+
+static const struct {
+	u32 iflag;
+	u32 fsflag;
+} f2fs_fsflags_map[] = {
+	{ F2FS_SYNC_FL,		FS_SYNC_FL },
+	{ F2FS_IMMUTABLE_FL,	FS_IMMUTABLE_FL },
+	{ F2FS_APPEND_FL,	FS_APPEND_FL },
+	{ F2FS_NODUMP_FL,	FS_NODUMP_FL },
+	{ F2FS_NOATIME_FL,	FS_NOATIME_FL },
+	{ F2FS_INDEX_FL,	FS_INDEX_FL },
+	{ F2FS_DIRSYNC_FL,	FS_DIRSYNC_FL },
+	{ F2FS_PROJINHERIT_FL,	FS_PROJINHERIT_FL },
+};
+
+#define F2FS_GETTABLE_FS_FL (		\
+		FS_SYNC_FL |		\
+		FS_IMMUTABLE_FL |	\
+		FS_APPEND_FL |		\
+		FS_NODUMP_FL |		\
+		FS_NOATIME_FL |		\
+		FS_INDEX_FL |		\
+		FS_DIRSYNC_FL |		\
+		FS_PROJINHERIT_FL |	\
+		FS_ENCRYPT_FL |		\
+		FS_INLINE_DATA_FL |	\
+		FS_NOCOW_FL)
+
+#define F2FS_SETTABLE_FS_FL (		\
+		FS_SYNC_FL |		\
+		FS_IMMUTABLE_FL |	\
+		FS_APPEND_FL |		\
+		FS_NODUMP_FL |		\
+		FS_NOATIME_FL |		\
+		FS_DIRSYNC_FL |		\
+		FS_PROJINHERIT_FL)
+
+/* Convert f2fs on-disk i_flags to FS_IOC_{GET,SET}FLAGS flags */
+static inline u32 f2fs_iflags_to_fsflags(u32 iflags)
+{
+	u32 fsflags = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
+		if (iflags & f2fs_fsflags_map[i].iflag)
+			fsflags |= f2fs_fsflags_map[i].fsflag;
+
+	return fsflags;
+}
+
+/* Convert FS_IOC_{GET,SET}FLAGS flags to f2fs on-disk i_flags */
+static inline u32 f2fs_fsflags_to_iflags(u32 fsflags)
+{
+	u32 iflags = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(f2fs_fsflags_map); i++)
+		if (fsflags & f2fs_fsflags_map[i].fsflag)
+			iflags |= f2fs_fsflags_map[i].iflag;
+
+	return iflags;
+}
+
+static int f2fs_ioc_getflags(struct file *filp, unsigned long arg)
+{
+	struct inode *inode = file_inode(filp);
+	struct f2fs_inode_info *fi = F2FS_I(inode);
+	u32 fsflags = f2fs_iflags_to_fsflags(fi->i_flags);
+
+	if (IS_ENCRYPTED(inode))
+		fsflags |= FS_ENCRYPT_FL;
+	if (f2fs_has_inline_data(inode) || f2fs_has_inline_dentry(inode))
+		fsflags |= FS_INLINE_DATA_FL;
+	if (is_inode_flag_set(inode, FI_PIN_FILE))
+		fsflags |= FS_NOCOW_FL;
+
+	fsflags &= F2FS_GETTABLE_FS_FL;
+
+	return put_user(fsflags, (int __user *)arg);
+}
+
 static int f2fs_ioc_setflags(struct file *filp, unsigned long arg)
 {
 	struct inode *inode = file_inode(filp);
-	unsigned int flags;
+	u32 fsflags;
+	u32 iflags;
 	int ret;
 
 	if (!inode_owner_or_capable(inode))
 		return -EACCES;
 
-	if (get_user(flags, (int __user *)arg))
+	if (get_user(fsflags, (int __user *)arg))
 		return -EFAULT;
 
+	if (fsflags & ~F2FS_GETTABLE_FS_FL)
+		return -EOPNOTSUPP;
+	fsflags &= F2FS_SETTABLE_FS_FL;
+
+	iflags = f2fs_fsflags_to_iflags(fsflags);
+	if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
+		return -EOPNOTSUPP;
+
 	ret = mnt_want_write_file(filp);
 	if (ret)
 		return ret;
 
 	inode_lock(inode);
 
-	ret = __f2fs_ioc_setflags(inode, flags);
-
+	ret = f2fs_setflags_common(inode, iflags,
+			f2fs_fsflags_to_iflags(F2FS_SETTABLE_FS_FL));
 	inode_unlock(inode);
 	mnt_drop_write_file(filp);
 	return ret;
@@ -1750,18 +1837,19 @@ static int f2fs_ioc_start_atomic_write(struct file *filp)
 
 	down_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 
-	if (!get_dirty_pages(inode))
-		goto skip_flush;
-
-	f2fs_msg(F2FS_I_SB(inode)->sb, KERN_WARNING,
-		"Unexpected flush for atomic writes: ino=%lu, npages=%u",
-					inode->i_ino, get_dirty_pages(inode));
+	/*
+	 * Should wait end_io to count F2FS_WB_CP_DATA correctly by
+	 * f2fs_is_atomic_file.
+	 */
+	if (get_dirty_pages(inode))
+		f2fs_warn(F2FS_I_SB(inode), "Unexpected flush for atomic writes: ino=%lu, npages=%u",
+			  inode->i_ino, get_dirty_pages(inode));
 	ret = filemap_write_and_wait_range(inode->i_mapping, 0, LLONG_MAX);
 	if (ret) {
 		up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
 		goto out;
 	}
-skip_flush:
+
 	set_inode_flag(inode, FI_ATOMIC_FILE);
 	clear_inode_flag(inode, FI_ATOMIC_REVOKE_REQUEST);
 	up_write(&F2FS_I(inode)->i_gc_rwsem[WRITE]);
@@ -1968,11 +2056,11 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
 		break;
 	case F2FS_GOING_DOWN_NEED_FSCK:
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
+		set_sbi_flag(sbi, SBI_IS_DIRTY);
 		/* do checkpoint only */
 		ret = f2fs_sync_fs(sb, 1);
-		if (ret)
-			goto out;
-		break;
+		goto out;
 	default:
 		ret = -EINVAL;
 		goto out;
@@ -1988,6 +2076,9 @@ static int f2fs_ioc_shutdown(struct file *filp, unsigned long arg)
 out:
 	if (in != F2FS_GOING_DOWN_FULLSYNC)
 		mnt_drop_write_file(filp);
+
+	trace_f2fs_shutdown(sbi, in, ret);
+
 	return ret;
 }
 
@@ -2187,8 +2278,7 @@ static int f2fs_ioc_write_checkpoint(struct file *filp, unsigned long arg)
 		return -EROFS;
 
 	if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED))) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"Skipping Checkpoint. Checkpoints currently disabled.");
+		f2fs_info(sbi, "Skipping Checkpoint. Checkpoints currently disabled.");
 		return -EINVAL;
 	}
 
@@ -2277,7 +2367,7 @@ static int f2fs_defragment_range(struct f2fs_sb_info *sbi,
 	if (!fragmented)
 		goto out;
 
-	sec_num = (total + BLKS_PER_SEC(sbi) - 1) / BLKS_PER_SEC(sbi);
+	sec_num = DIV_ROUND_UP(total, BLKS_PER_SEC(sbi));
 
 	/*
 	 * make sure there are enough free section for LFS allocation, this can
@@ -2414,7 +2504,7 @@ static int f2fs_move_file_range(struct file *file_in, loff_t pos_in,
 	if (!S_ISREG(src->i_mode) || !S_ISREG(dst->i_mode))
 		return -EINVAL;
 
-	if (f2fs_encrypted_inode(src) || f2fs_encrypted_inode(dst))
+	if (IS_ENCRYPTED(src) || IS_ENCRYPTED(dst))
 		return -EOPNOTSUPP;
 
 	if (src == dst) {
@@ -2571,12 +2661,10 @@ static int f2fs_ioc_flush_device(struct file *filp, unsigned long arg)
 							sizeof(range)))
 		return -EFAULT;
 
-	if (sbi->s_ndevs <= 1 || sbi->s_ndevs - 1 <= range.dev_num ||
+	if (!f2fs_is_multi_device(sbi) || sbi->s_ndevs - 1 <= range.dev_num ||
 			__is_large_section(sbi)) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"Can't flush %u in %d for segs_per_sec %u != 1\n",
-				range.dev_num, sbi->s_ndevs,
-				sbi->segs_per_sec);
+		f2fs_warn(sbi, "Can't flush %u in %d for segs_per_sec %u != 1",
+			  range.dev_num, sbi->s_ndevs, sbi->segs_per_sec);
 		return -EINVAL;
 	}
 
@@ -2713,47 +2801,56 @@ static int f2fs_ioc_setproject(struct file *filp, __u32 projid)
 }
 #endif
 
-/* Transfer internal flags to xflags */
-static inline __u32 f2fs_iflags_to_xflags(unsigned long iflags)
-{
-	__u32 xflags = 0;
-
-	if (iflags & F2FS_SYNC_FL)
-		xflags |= FS_XFLAG_SYNC;
-	if (iflags & F2FS_IMMUTABLE_FL)
-		xflags |= FS_XFLAG_IMMUTABLE;
-	if (iflags & F2FS_APPEND_FL)
-		xflags |= FS_XFLAG_APPEND;
-	if (iflags & F2FS_NODUMP_FL)
-		xflags |= FS_XFLAG_NODUMP;
-	if (iflags & F2FS_NOATIME_FL)
-		xflags |= FS_XFLAG_NOATIME;
-	if (iflags & F2FS_PROJINHERIT_FL)
-		xflags |= FS_XFLAG_PROJINHERIT;
+/* FS_IOC_FSGETXATTR and FS_IOC_FSSETXATTR support */
+
+/*
+ * To make a new on-disk f2fs i_flag gettable via FS_IOC_FSGETXATTR and settable
+ * via FS_IOC_FSSETXATTR, add an entry for it to f2fs_xflags_map[], and add its
+ * FS_XFLAG_* equivalent to F2FS_SUPPORTED_XFLAGS.
+ */
+
+static const struct {
+	u32 iflag;
+	u32 xflag;
+} f2fs_xflags_map[] = {
+	{ F2FS_SYNC_FL,		FS_XFLAG_SYNC },
+	{ F2FS_IMMUTABLE_FL,	FS_XFLAG_IMMUTABLE },
+	{ F2FS_APPEND_FL,	FS_XFLAG_APPEND },
+	{ F2FS_NODUMP_FL,	FS_XFLAG_NODUMP },
+	{ F2FS_NOATIME_FL,	FS_XFLAG_NOATIME },
+	{ F2FS_PROJINHERIT_FL,	FS_XFLAG_PROJINHERIT },
+};
+
+#define F2FS_SUPPORTED_XFLAGS (		\
+		FS_XFLAG_SYNC |		\
+		FS_XFLAG_IMMUTABLE |	\
+		FS_XFLAG_APPEND |	\
+		FS_XFLAG_NODUMP |	\
+		FS_XFLAG_NOATIME |	\
+		FS_XFLAG_PROJINHERIT)
+
+/* Convert f2fs on-disk i_flags to FS_IOC_FS{GET,SET}XATTR flags */
+static inline u32 f2fs_iflags_to_xflags(u32 iflags)
+{
+	u32 xflags = 0;
+	int i;
+
+	for (i = 0; i < ARRAY_SIZE(f2fs_xflags_map); i++)
+		if (iflags & f2fs_xflags_map[i].iflag)
+			xflags |= f2fs_xflags_map[i].xflag;
+
 	return xflags;
 }
 
-#define F2FS_SUPPORTED_FS_XFLAGS (FS_XFLAG_SYNC | FS_XFLAG_IMMUTABLE | \
-				  FS_XFLAG_APPEND | FS_XFLAG_NODUMP | \
-				  FS_XFLAG_NOATIME | FS_XFLAG_PROJINHERIT)
-
-/* Transfer xflags flags to internal */
-static inline unsigned long f2fs_xflags_to_iflags(__u32 xflags)
+/* Convert FS_IOC_FS{GET,SET}XATTR flags to f2fs on-disk i_flags */
+static inline u32 f2fs_xflags_to_iflags(u32 xflags)
 {
-	unsigned long iflags = 0;
+	u32 iflags = 0;
+	int i;
 
-	if (xflags & FS_XFLAG_SYNC)
-		iflags |= F2FS_SYNC_FL;
-	if (xflags & FS_XFLAG_IMMUTABLE)
-		iflags |= F2FS_IMMUTABLE_FL;
-	if (xflags & FS_XFLAG_APPEND)
-		iflags |= F2FS_APPEND_FL;
-	if (xflags & FS_XFLAG_NODUMP)
-		iflags |= F2FS_NODUMP_FL;
-	if (xflags & FS_XFLAG_NOATIME)
-		iflags |= F2FS_NOATIME_FL;
-	if (xflags & FS_XFLAG_PROJINHERIT)
-		iflags |= F2FS_PROJINHERIT_FL;
+	for (i = 0; i < ARRAY_SIZE(f2fs_xflags_map); i++)
+		if (xflags & f2fs_xflags_map[i].xflag)
+			iflags |= f2fs_xflags_map[i].iflag;
 
 	return iflags;
 }
@@ -2765,8 +2862,7 @@ static int f2fs_ioc_fsgetxattr(struct file *filp, unsigned long arg)
 	struct fsxattr fa;
 
 	memset(&fa, 0, sizeof(struct fsxattr));
-	fa.fsx_xflags = f2fs_iflags_to_xflags(fi->i_flags &
-				F2FS_FL_USER_VISIBLE);
+	fa.fsx_xflags = f2fs_iflags_to_xflags(fi->i_flags);
 
 	if (f2fs_sb_has_project_quota(F2FS_I_SB(inode)))
 		fa.fsx_projid = (__u32)from_kprojid(&init_user_ns,
@@ -2804,9 +2900,8 @@ static int f2fs_ioctl_check_project(struct inode *inode, struct fsxattr *fa)
 static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
 {
 	struct inode *inode = file_inode(filp);
-	struct f2fs_inode_info *fi = F2FS_I(inode);
 	struct fsxattr fa;
-	unsigned int flags;
+	u32 iflags;
 	int err;
 
 	if (copy_from_user(&fa, (struct fsxattr __user *)arg, sizeof(fa)))
@@ -2816,11 +2911,11 @@ static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
 	if (!inode_owner_or_capable(inode))
 		return -EACCES;
 
-	if (fa.fsx_xflags & ~F2FS_SUPPORTED_FS_XFLAGS)
+	if (fa.fsx_xflags & ~F2FS_SUPPORTED_XFLAGS)
 		return -EOPNOTSUPP;
 
-	flags = f2fs_xflags_to_iflags(fa.fsx_xflags);
-	if (f2fs_mask_flags(inode->i_mode, flags) != flags)
+	iflags = f2fs_xflags_to_iflags(fa.fsx_xflags);
+	if (f2fs_mask_flags(inode->i_mode, iflags) != iflags)
 		return -EOPNOTSUPP;
 
 	err = mnt_want_write_file(filp);
@@ -2831,9 +2926,8 @@ static int f2fs_ioc_fssetxattr(struct file *filp, unsigned long arg)
 	err = f2fs_ioctl_check_project(inode, &fa);
 	if (err)
 		goto out;
-	flags = (fi->i_flags & ~F2FS_FL_XFLAG_VISIBLE) |
-				(flags & F2FS_FL_XFLAG_VISIBLE);
-	err = __f2fs_ioc_setflags(inode, flags);
+	err = f2fs_setflags_common(inode, iflags,
+			f2fs_xflags_to_iflags(F2FS_SUPPORTED_XFLAGS));
 	if (err)
 		goto out;
 
@@ -2855,10 +2949,9 @@ int f2fs_pin_file_control(struct inode *inode, bool inc)
 				fi->i_gc_failures[GC_FAILURE_PIN] + 1);
 
 	if (fi->i_gc_failures[GC_FAILURE_PIN] > sbi->gc_pin_file_threshold) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: Enable GC = ino %lx after %x GC trials\n",
-			__func__, inode->i_ino,
-			fi->i_gc_failures[GC_FAILURE_PIN]);
+		f2fs_warn(sbi, "%s: Enable GC = ino %lx after %x GC trials",
+			  __func__, inode->i_ino,
+			  fi->i_gc_failures[GC_FAILURE_PIN]);
 		clear_inode_flag(inode, FI_PIN_FILE);
 		return -EAGAIN;
 	}
@@ -2871,9 +2964,6 @@ static int f2fs_ioc_set_pin_file(struct file *filp, unsigned long arg)
 	__u32 pin;
 	int ret = 0;
 
-	if (!inode_owner_or_capable(inode))
-		return -EACCES;
-
 	if (get_user(pin, (__u32 __user *)arg))
 		return -EFAULT;
 
@@ -2966,6 +3056,27 @@ static int f2fs_ioc_precache_extents(struct file *filp, unsigned long arg)
 	return f2fs_precache_extents(file_inode(filp));
 }
 
+static int f2fs_ioc_resize_fs(struct file *filp, unsigned long arg)
+{
+	struct f2fs_sb_info *sbi = F2FS_I_SB(file_inode(filp));
+	__u64 block_count;
+	int ret;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (f2fs_readonly(sbi->sb))
+		return -EROFS;
+
+	if (copy_from_user(&block_count, (void __user *)arg,
+			   sizeof(block_count)))
+		return -EFAULT;
+
+	ret = f2fs_resize_fs(sbi, block_count);
+
+	return ret;
+}
+
 long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 {
 	if (unlikely(f2fs_cp_error(F2FS_I_SB(file_inode(filp)))))
@@ -3022,6 +3133,8 @@ long f2fs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		return f2fs_ioc_set_pin_file(filp, arg);
 	case F2FS_IOC_PRECACHE_EXTENTS:
 		return f2fs_ioc_precache_extents(filp, arg);
+	case F2FS_IOC_RESIZE_FS:
+		return f2fs_ioc_resize_fs(filp, arg);
 	default:
 		return -ENOTTY;
 	}
@@ -3033,15 +3146,21 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	struct inode *inode = file_inode(file);
 	ssize_t ret;
 
-	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode))))
-		return -EIO;
+	if (unlikely(f2fs_cp_error(F2FS_I_SB(inode)))) {
+		ret = -EIO;
+		goto out;
+	}
 
-	if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT))
-		return -EINVAL;
+	if ((iocb->ki_flags & IOCB_NOWAIT) && !(iocb->ki_flags & IOCB_DIRECT)) {
+		ret = -EINVAL;
+		goto out;
+	}
 
 	if (!inode_trylock(inode)) {
-		if (iocb->ki_flags & IOCB_NOWAIT)
-			return -EAGAIN;
+		if (iocb->ki_flags & IOCB_NOWAIT) {
+			ret = -EAGAIN;
+			goto out;
+		}
 		inode_lock(inode);
 	}
 
@@ -3054,19 +3173,16 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 		if (iov_iter_fault_in_readable(from, iov_iter_count(from)))
 			set_inode_flag(inode, FI_NO_PREALLOC);
 
-		if ((iocb->ki_flags & IOCB_NOWAIT) &&
-			(iocb->ki_flags & IOCB_DIRECT)) {
-				if (!f2fs_overwrite_io(inode, iocb->ki_pos,
+		if ((iocb->ki_flags & IOCB_NOWAIT)) {
+			if (!f2fs_overwrite_io(inode, iocb->ki_pos,
 						iov_iter_count(from)) ||
-					f2fs_has_inline_data(inode) ||
-					f2fs_force_buffered_io(inode,
-							iocb, from)) {
-						clear_inode_flag(inode,
-								FI_NO_PREALLOC);
-						inode_unlock(inode);
-						return -EAGAIN;
-				}
-
+				f2fs_has_inline_data(inode) ||
+				f2fs_force_buffered_io(inode, iocb, from)) {
+				clear_inode_flag(inode, FI_NO_PREALLOC);
+				inode_unlock(inode);
+				ret = -EAGAIN;
+				goto out;
+			}
 		} else {
 			preallocated = true;
 			target_size = iocb->ki_pos + iov_iter_count(from);
@@ -3075,7 +3191,8 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 			if (err) {
 				clear_inode_flag(inode, FI_NO_PREALLOC);
 				inode_unlock(inode);
-				return err;
+				ret = err;
+				goto out;
 			}
 		}
 		ret = __generic_file_write_iter(iocb, from);
@@ -3089,7 +3206,9 @@ static ssize_t f2fs_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
 			f2fs_update_iostat(F2FS_I_SB(inode), APP_WRITE_IO, ret);
 	}
 	inode_unlock(inode);
-
+out:
+	trace_f2fs_file_write_iter(inode, iocb->ki_pos,
+					iov_iter_count(from), ret);
 	if (ret > 0)
 		ret = generic_write_sync(iocb, ret);
 	return ret;
@@ -3129,6 +3248,7 @@ long f2fs_compat_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 	case F2FS_IOC_GET_PIN_FILE:
 	case F2FS_IOC_SET_PIN_FILE:
 	case F2FS_IOC_PRECACHE_EXTENTS:
+	case F2FS_IOC_RESIZE_FS:
 		break;
 	default:
 		return -ENOIOCTLCMD;
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 195cf0f9d9ef..6691f526fa40 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -311,10 +311,11 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
 	struct sit_info *sm = SIT_I(sbi);
 	struct victim_sel_policy p;
 	unsigned int secno, last_victim;
-	unsigned int last_segment = MAIN_SEGS(sbi);
+	unsigned int last_segment;
 	unsigned int nsearched = 0;
 
 	mutex_lock(&dirty_i->seglist_lock);
+	last_segment = MAIN_SECS(sbi) * sbi->segs_per_sec;
 
 	p.alloc_mode = alloc_mode;
 	select_policy(sbi, gc_type, type, &p);
@@ -387,7 +388,8 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
 			goto next;
 		/* Don't touch checkpointed data */
 		if (unlikely(is_sbi_flag_set(sbi, SBI_CP_DISABLED) &&
-					get_ckpt_valid_blocks(sbi, segno)))
+					get_ckpt_valid_blocks(sbi, segno) &&
+					p.alloc_mode != SSR))
 			goto next;
 		if (gc_type == BG_GC && test_bit(secno, dirty_i->victim_secmap))
 			goto next;
@@ -404,7 +406,8 @@ next:
 				sm->last_victim[p.gc_mode] = last_victim + 1;
 			else
 				sm->last_victim[p.gc_mode] = segno + 1;
-			sm->last_victim[p.gc_mode] %= MAIN_SEGS(sbi);
+			sm->last_victim[p.gc_mode] %=
+				(MAIN_SECS(sbi) * sbi->segs_per_sec);
 			break;
 		}
 	}
@@ -591,7 +594,7 @@ block_t f2fs_start_bidx_of_node(unsigned int node_ofs, struct inode *inode)
 		int dec = (node_ofs - indirect_blks - 3) / (NIDS_PER_BLOCK + 1);
 		bidx = node_ofs - 5 - dec;
 	}
-	return bidx * ADDRS_PER_BLOCK + ADDRS_PER_INODE(inode);
+	return bidx * ADDRS_PER_BLOCK(inode) + ADDRS_PER_INODE(inode);
 }
 
 static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
@@ -615,9 +618,8 @@ static bool is_alive(struct f2fs_sb_info *sbi, struct f2fs_summary *sum,
 	}
 
 	if (sum->version != dni->version) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-				"%s: valid data with mismatched node version.",
-				__func__);
+		f2fs_warn(sbi, "%s: valid data with mismatched node version.",
+			  __func__);
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
 	}
 
@@ -656,6 +658,11 @@ static int ra_data_block(struct inode *inode, pgoff_t index)
 
 	if (f2fs_lookup_extent_cache(inode, index, &ei)) {
 		dn.data_blkaddr = ei.blk + index - ei.fofs;
+		if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
+						DATA_GENERIC_ENHANCE_READ))) {
+			err = -EFSCORRUPTED;
+			goto put_page;
+		}
 		goto got_it;
 	}
 
@@ -665,9 +672,13 @@ static int ra_data_block(struct inode *inode, pgoff_t index)
 		goto put_page;
 	f2fs_put_dnode(&dn);
 
+	if (!__is_valid_data_blkaddr(dn.data_blkaddr)) {
+		err = -ENOENT;
+		goto put_page;
+	}
 	if (unlikely(!f2fs_is_valid_blkaddr(sbi, dn.data_blkaddr,
-						DATA_GENERIC))) {
-		err = -EFAULT;
+						DATA_GENERIC_ENHANCE))) {
+		err = -EFSCORRUPTED;
 		goto put_page;
 	}
 got_it:
@@ -1171,10 +1182,10 @@ static int do_garbage_collect(struct f2fs_sb_info *sbi,
 
 		sum = page_address(sum_page);
 		if (type != GET_SUM_TYPE((&sum->footer))) {
-			f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent segment (%u) "
-				"type [%d, %d] in SSA and SIT",
-				segno, type, GET_SUM_TYPE((&sum->footer)));
+			f2fs_err(sbi, "Inconsistent segment (%u) type [%d, %d] in SSA and SIT",
+				 segno, type, GET_SUM_TYPE((&sum->footer)));
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
+			f2fs_stop_checkpoint(sbi, false);
 			goto skip;
 		}
 
@@ -1346,7 +1357,180 @@ void f2fs_build_gc_manager(struct f2fs_sb_info *sbi)
 	sbi->gc_pin_file_threshold = DEF_GC_FAILED_PINNED_FILES;
 
 	/* give warm/cold data area from slower device */
-	if (sbi->s_ndevs && !__is_large_section(sbi))
+	if (f2fs_is_multi_device(sbi) && !__is_large_section(sbi))
 		SIT_I(sbi)->last_victim[ALLOC_NEXT] =
 				GET_SEGNO(sbi, FDEV(0).end_blk) + 1;
 }
+
+static int free_segment_range(struct f2fs_sb_info *sbi, unsigned int start,
+							unsigned int end)
+{
+	int type;
+	unsigned int segno, next_inuse;
+	int err = 0;
+
+	/* Move out cursegs from the target range */
+	for (type = CURSEG_HOT_DATA; type < NR_CURSEG_TYPE; type++)
+		allocate_segment_for_resize(sbi, type, start, end);
+
+	/* do GC to move out valid blocks in the range */
+	for (segno = start; segno <= end; segno += sbi->segs_per_sec) {
+		struct gc_inode_list gc_list = {
+			.ilist = LIST_HEAD_INIT(gc_list.ilist),
+			.iroot = RADIX_TREE_INIT(gc_list.iroot, GFP_NOFS),
+		};
+
+		mutex_lock(&sbi->gc_mutex);
+		do_garbage_collect(sbi, segno, &gc_list, FG_GC);
+		mutex_unlock(&sbi->gc_mutex);
+		put_gc_inode(&gc_list);
+
+		if (get_valid_blocks(sbi, segno, true))
+			return -EAGAIN;
+	}
+
+	err = f2fs_sync_fs(sbi->sb, 1);
+	if (err)
+		return err;
+
+	next_inuse = find_next_inuse(FREE_I(sbi), end + 1, start);
+	if (next_inuse <= end) {
+		f2fs_err(sbi, "segno %u should be free but still inuse!",
+			 next_inuse);
+		f2fs_bug_on(sbi, 1);
+	}
+	return err;
+}
+
+static void update_sb_metadata(struct f2fs_sb_info *sbi, int secs)
+{
+	struct f2fs_super_block *raw_sb = F2FS_RAW_SUPER(sbi);
+	int section_count = le32_to_cpu(raw_sb->section_count);
+	int segment_count = le32_to_cpu(raw_sb->segment_count);
+	int segment_count_main = le32_to_cpu(raw_sb->segment_count_main);
+	long long block_count = le64_to_cpu(raw_sb->block_count);
+	int segs = secs * sbi->segs_per_sec;
+
+	raw_sb->section_count = cpu_to_le32(section_count + secs);
+	raw_sb->segment_count = cpu_to_le32(segment_count + segs);
+	raw_sb->segment_count_main = cpu_to_le32(segment_count_main + segs);
+	raw_sb->block_count = cpu_to_le64(block_count +
+					(long long)segs * sbi->blocks_per_seg);
+}
+
+static void update_fs_metadata(struct f2fs_sb_info *sbi, int secs)
+{
+	int segs = secs * sbi->segs_per_sec;
+	long long user_block_count =
+				le64_to_cpu(F2FS_CKPT(sbi)->user_block_count);
+
+	SM_I(sbi)->segment_count = (int)SM_I(sbi)->segment_count + segs;
+	MAIN_SEGS(sbi) = (int)MAIN_SEGS(sbi) + segs;
+	FREE_I(sbi)->free_sections = (int)FREE_I(sbi)->free_sections + secs;
+	FREE_I(sbi)->free_segments = (int)FREE_I(sbi)->free_segments + segs;
+	F2FS_CKPT(sbi)->user_block_count = cpu_to_le64(user_block_count +
+					(long long)segs * sbi->blocks_per_seg);
+}
+
+int f2fs_resize_fs(struct f2fs_sb_info *sbi, __u64 block_count)
+{
+	__u64 old_block_count, shrunk_blocks;
+	unsigned int secs;
+	int gc_mode, gc_type;
+	int err = 0;
+	__u32 rem;
+
+	old_block_count = le64_to_cpu(F2FS_RAW_SUPER(sbi)->block_count);
+	if (block_count > old_block_count)
+		return -EINVAL;
+
+	/* new fs size should align to section size */
+	div_u64_rem(block_count, BLKS_PER_SEC(sbi), &rem);
+	if (rem)
+		return -EINVAL;
+
+	if (block_count == old_block_count)
+		return 0;
+
+	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
+		f2fs_err(sbi, "Should run fsck to repair first.");
+		return -EFSCORRUPTED;
+	}
+
+	if (test_opt(sbi, DISABLE_CHECKPOINT)) {
+		f2fs_err(sbi, "Checkpoint should be enabled.");
+		return -EINVAL;
+	}
+
+	freeze_bdev(sbi->sb->s_bdev);
+
+	shrunk_blocks = old_block_count - block_count;
+	secs = div_u64(shrunk_blocks, BLKS_PER_SEC(sbi));
+	spin_lock(&sbi->stat_lock);
+	if (shrunk_blocks + valid_user_blocks(sbi) +
+		sbi->current_reserved_blocks + sbi->unusable_block_count +
+		F2FS_OPTION(sbi).root_reserved_blocks > sbi->user_block_count)
+		err = -ENOSPC;
+	else
+		sbi->user_block_count -= shrunk_blocks;
+	spin_unlock(&sbi->stat_lock);
+	if (err) {
+		thaw_bdev(sbi->sb->s_bdev, sbi->sb);
+		return err;
+	}
+
+	mutex_lock(&sbi->resize_mutex);
+	set_sbi_flag(sbi, SBI_IS_RESIZEFS);
+
+	mutex_lock(&DIRTY_I(sbi)->seglist_lock);
+
+	MAIN_SECS(sbi) -= secs;
+
+	for (gc_mode = 0; gc_mode < MAX_GC_POLICY; gc_mode++)
+		if (SIT_I(sbi)->last_victim[gc_mode] >=
+					MAIN_SECS(sbi) * sbi->segs_per_sec)
+			SIT_I(sbi)->last_victim[gc_mode] = 0;
+
+	for (gc_type = BG_GC; gc_type <= FG_GC; gc_type++)
+		if (sbi->next_victim_seg[gc_type] >=
+					MAIN_SECS(sbi) * sbi->segs_per_sec)
+			sbi->next_victim_seg[gc_type] = NULL_SEGNO;
+
+	mutex_unlock(&DIRTY_I(sbi)->seglist_lock);
+
+	err = free_segment_range(sbi, MAIN_SECS(sbi) * sbi->segs_per_sec,
+			MAIN_SEGS(sbi) - 1);
+	if (err)
+		goto out;
+
+	update_sb_metadata(sbi, -secs);
+
+	err = f2fs_commit_super(sbi, false);
+	if (err) {
+		update_sb_metadata(sbi, secs);
+		goto out;
+	}
+
+	update_fs_metadata(sbi, -secs);
+	clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
+	err = f2fs_sync_fs(sbi->sb, 1);
+	if (err) {
+		update_fs_metadata(sbi, secs);
+		update_sb_metadata(sbi, secs);
+		f2fs_commit_super(sbi, false);
+	}
+out:
+	if (err) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_err(sbi, "resize_fs failed, should run fsck to repair!");
+
+		MAIN_SECS(sbi) += secs;
+		spin_lock(&sbi->stat_lock);
+		sbi->user_block_count += shrunk_blocks;
+		spin_unlock(&sbi->stat_lock);
+	}
+	clear_sbi_flag(sbi, SBI_IS_RESIZEFS);
+	mutex_unlock(&sbi->resize_mutex);
+	thaw_bdev(sbi->sb->s_bdev, sbi->sb);
+	return err;
+}
diff --git a/fs/f2fs/inline.c b/fs/f2fs/inline.c
index d636cbcf68f2..3613efca8c00 100644
--- a/fs/f2fs/inline.c
+++ b/fs/f2fs/inline.c
@@ -140,11 +140,9 @@ int f2fs_convert_inline_page(struct dnode_of_data *dn, struct page *page)
 	if (unlikely(dn->data_blkaddr != NEW_ADDR)) {
 		f2fs_put_dnode(dn);
 		set_sbi_flag(fio.sbi, SBI_NEED_FSCK);
-		f2fs_msg(fio.sbi->sb, KERN_WARNING,
-			"%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
-			"run fsck to fix.",
-			__func__, dn->inode->i_ino, dn->data_blkaddr);
-		return -EINVAL;
+		f2fs_warn(fio.sbi, "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
+			  __func__, dn->inode->i_ino, dn->data_blkaddr);
+		return -EFSCORRUPTED;
 	}
 
 	f2fs_bug_on(F2FS_P_SB(page), PageWriteback(page));
@@ -298,7 +296,7 @@ process_inline:
 		clear_inode_flag(inode, FI_INLINE_DATA);
 		f2fs_put_page(ipage, 1);
 	} else if (ri && (ri->i_inline & F2FS_INLINE_DATA)) {
-		if (f2fs_truncate_blocks(inode, 0, false, false))
+		if (f2fs_truncate_blocks(inode, 0, false))
 			return false;
 		goto process_inline;
 	}
@@ -383,11 +381,9 @@ static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
 	if (unlikely(dn.data_blkaddr != NEW_ADDR)) {
 		f2fs_put_dnode(&dn);
 		set_sbi_flag(F2FS_P_SB(page), SBI_NEED_FSCK);
-		f2fs_msg(F2FS_P_SB(page)->sb, KERN_WARNING,
-			"%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, "
-			"run fsck to fix.",
-			__func__, dir->i_ino, dn.data_blkaddr);
-		err = -EINVAL;
+		f2fs_warn(F2FS_P_SB(page), "%s: corrupted inline inode ino=%lx, i_addr[0]:0x%x, run fsck to fix.",
+			  __func__, dir->i_ino, dn.data_blkaddr);
+		err = -EFSCORRUPTED;
 		goto out;
 	}
 
@@ -420,6 +416,14 @@ static int f2fs_move_inline_dirents(struct inode *dir, struct page *ipage,
 	stat_dec_inline_dir(dir);
 	clear_inode_flag(dir, FI_INLINE_DENTRY);
 
+	/*
+	 * should retrieve reserved space which was used to keep
+	 * inline_dentry's structure for backward compatibility.
+	 */
+	if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
+			!f2fs_has_inline_xattr(dir))
+		F2FS_I(dir)->i_inline_xattr_size = 0;
+
 	f2fs_i_depth_write(dir, 1);
 	if (i_size_read(dir) < PAGE_SIZE)
 		f2fs_i_size_write(dir, PAGE_SIZE);
@@ -470,7 +474,7 @@ static int f2fs_add_inline_entries(struct inode *dir, void *inline_dentry)
 	return 0;
 punch_dentry_pages:
 	truncate_inode_pages(&dir->i_data, 0);
-	f2fs_truncate_blocks(dir, 0, false, false);
+	f2fs_truncate_blocks(dir, 0, false);
 	f2fs_remove_dirty_inode(dir);
 	return err;
 }
@@ -501,6 +505,15 @@ static int f2fs_move_rehashed_dirents(struct inode *dir, struct page *ipage,
 
 	stat_dec_inline_dir(dir);
 	clear_inode_flag(dir, FI_INLINE_DENTRY);
+
+	/*
+	 * should retrieve reserved space which was used to keep
+	 * inline_dentry's structure for backward compatibility.
+	 */
+	if (!f2fs_sb_has_flexible_inline_xattr(F2FS_I_SB(dir)) &&
+			!f2fs_has_inline_xattr(dir))
+		F2FS_I(dir)->i_inline_xattr_size = 0;
+
 	kvfree(backup_dentry);
 	return 0;
 recover:
@@ -659,6 +672,12 @@ int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
 	if (IS_ERR(ipage))
 		return PTR_ERR(ipage);
 
+	/*
+	 * f2fs_readdir was protected by inode.i_rwsem, it is safe to access
+	 * ipage without page's lock held.
+	 */
+	unlock_page(ipage);
+
 	inline_dentry = inline_data_addr(inode, ipage);
 
 	make_dentry_ptr_inline(inode, &d, inline_dentry);
@@ -667,7 +686,7 @@ int f2fs_read_inline_dir(struct file *file, struct dir_context *ctx,
 	if (!err)
 		ctx->pos = d.max;
 
-	f2fs_put_page(ipage, 1);
+	f2fs_put_page(ipage, 0);
 	return err < 0 ? err : 0;
 }
 
diff --git a/fs/f2fs/inode.c b/fs/f2fs/inode.c
index bec52961630b..a33d7a849b2d 100644
--- a/fs/f2fs/inode.c
+++ b/fs/f2fs/inode.c
@@ -14,6 +14,7 @@
 #include "f2fs.h"
 #include "node.h"
 #include "segment.h"
+#include "xattr.h"
 
 #include <trace/events/f2fs.h>
 
@@ -43,7 +44,7 @@ void f2fs_set_inode_flags(struct inode *inode)
 		new_fl |= S_NOATIME;
 	if (flags & F2FS_DIRSYNC_FL)
 		new_fl |= S_DIRSYNC;
-	if (f2fs_encrypted_inode(inode))
+	if (file_is_encrypt(inode))
 		new_fl |= S_ENCRYPTED;
 	inode_set_flags(inode, new_fl,
 			S_SYNC|S_APPEND|S_IMMUTABLE|S_NOATIME|S_DIRSYNC|
@@ -72,8 +73,8 @@ static int __written_first_block(struct f2fs_sb_info *sbi,
 
 	if (!__is_valid_data_blkaddr(addr))
 		return 1;
-	if (!f2fs_is_valid_blkaddr(sbi, addr, DATA_GENERIC))
-		return -EFAULT;
+	if (!f2fs_is_valid_blkaddr(sbi, addr, DATA_GENERIC_ENHANCE))
+		return -EFSCORRUPTED;
 	return 0;
 }
 
@@ -175,9 +176,8 @@ bool f2fs_inode_chksum_verify(struct f2fs_sb_info *sbi, struct page *page)
 	calculated = f2fs_inode_chksum(sbi, page);
 
 	if (provided != calculated)
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"checksum invalid, ino = %x, %x vs. %x",
-			ino_of_node(page), provided, calculated);
+		f2fs_warn(sbi, "checksum invalid, nid = %lu, ino_of_node = %x, %x vs. %x",
+			  page->index, ino_of_node(page), provided, calculated);
 
 	return provided == calculated;
 }
@@ -201,50 +201,53 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page)
 	iblocks = le64_to_cpu(F2FS_INODE(node_page)->i_blocks);
 	if (!iblocks) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: corrupted inode i_blocks i_ino=%lx iblocks=%llu, "
-			"run fsck to fix.",
-			__func__, inode->i_ino, iblocks);
+		f2fs_warn(sbi, "%s: corrupted inode i_blocks i_ino=%lx iblocks=%llu, run fsck to fix.",
+			  __func__, inode->i_ino, iblocks);
 		return false;
 	}
 
 	if (ino_of_node(node_page) != nid_of_node(node_page)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: corrupted inode footer i_ino=%lx, ino,nid: "
-			"[%u, %u] run fsck to fix.",
-			__func__, inode->i_ino,
-			ino_of_node(node_page), nid_of_node(node_page));
+		f2fs_warn(sbi, "%s: corrupted inode footer i_ino=%lx, ino,nid: [%u, %u] run fsck to fix.",
+			  __func__, inode->i_ino,
+			  ino_of_node(node_page), nid_of_node(node_page));
 		return false;
 	}
 
 	if (f2fs_sb_has_flexible_inline_xattr(sbi)
 			&& !f2fs_has_extra_attr(inode)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: corrupted inode ino=%lx, run fsck to fix.",
-			__func__, inode->i_ino);
+		f2fs_warn(sbi, "%s: corrupted inode ino=%lx, run fsck to fix.",
+			  __func__, inode->i_ino);
 		return false;
 	}
 
 	if (f2fs_has_extra_attr(inode) &&
 			!f2fs_sb_has_extra_attr(sbi)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: inode (ino=%lx) is with extra_attr, "
-			"but extra_attr feature is off",
-			__func__, inode->i_ino);
+		f2fs_warn(sbi, "%s: inode (ino=%lx) is with extra_attr, but extra_attr feature is off",
+			  __func__, inode->i_ino);
 		return false;
 	}
 
 	if (fi->i_extra_isize > F2FS_TOTAL_EXTRA_ATTR_SIZE ||
 			fi->i_extra_isize % sizeof(__le32)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: inode (ino=%lx) has corrupted i_extra_isize: %d, "
-			"max: %zu",
-			__func__, inode->i_ino, fi->i_extra_isize,
-			F2FS_TOTAL_EXTRA_ATTR_SIZE);
+		f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_extra_isize: %d, max: %zu",
+			  __func__, inode->i_ino, fi->i_extra_isize,
+			  F2FS_TOTAL_EXTRA_ATTR_SIZE);
+		return false;
+	}
+
+	if (f2fs_has_extra_attr(inode) &&
+		f2fs_sb_has_flexible_inline_xattr(sbi) &&
+		f2fs_has_inline_xattr(inode) &&
+		(!fi->i_inline_xattr_size ||
+		fi->i_inline_xattr_size > MAX_INLINE_XATTR_SIZE)) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_warn(sbi, "%s: inode (ino=%lx) has corrupted i_inline_xattr_size: %d, max: %zu",
+			  __func__, inode->i_ino, fi->i_inline_xattr_size,
+			  MAX_INLINE_XATTR_SIZE);
 		return false;
 	}
 
@@ -252,15 +255,14 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page)
 		struct extent_info *ei = &F2FS_I(inode)->extent_tree->largest;
 
 		if (ei->len &&
-			(!f2fs_is_valid_blkaddr(sbi, ei->blk, DATA_GENERIC) ||
+			(!f2fs_is_valid_blkaddr(sbi, ei->blk,
+						DATA_GENERIC_ENHANCE) ||
 			!f2fs_is_valid_blkaddr(sbi, ei->blk + ei->len - 1,
-							DATA_GENERIC))) {
+						DATA_GENERIC_ENHANCE))) {
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"%s: inode (ino=%lx) extent info [%u, %u, %u] "
-				"is incorrect, run fsck to fix",
-				__func__, inode->i_ino,
-				ei->blk, ei->fofs, ei->len);
+			f2fs_warn(sbi, "%s: inode (ino=%lx) extent info [%u, %u, %u] is incorrect, run fsck to fix",
+				  __func__, inode->i_ino,
+				  ei->blk, ei->fofs, ei->len);
 			return false;
 		}
 	}
@@ -268,19 +270,15 @@ static bool sanity_check_inode(struct inode *inode, struct page *node_page)
 	if (f2fs_has_inline_data(inode) &&
 			(!S_ISREG(inode->i_mode) && !S_ISLNK(inode->i_mode))) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: inode (ino=%lx, mode=%u) should not have "
-			"inline_data, run fsck to fix",
-			__func__, inode->i_ino, inode->i_mode);
+		f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_data, run fsck to fix",
+			  __func__, inode->i_ino, inode->i_mode);
 		return false;
 	}
 
 	if (f2fs_has_inline_dentry(inode) && !S_ISDIR(inode->i_mode)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"%s: inode (ino=%lx, mode=%u) should not have "
-			"inline_dentry, run fsck to fix",
-			__func__, inode->i_ino, inode->i_mode);
+		f2fs_warn(sbi, "%s: inode (ino=%lx, mode=%u) should not have inline_dentry, run fsck to fix",
+			  __func__, inode->i_ino, inode->i_mode);
 		return false;
 	}
 
@@ -327,6 +325,8 @@ static int do_read_inode(struct inode *inode)
 					le16_to_cpu(ri->i_gc_failures);
 	fi->i_xattr_nid = le32_to_cpu(ri->i_xattr_nid);
 	fi->i_flags = le32_to_cpu(ri->i_flags);
+	if (S_ISREG(inode->i_mode))
+		fi->i_flags &= ~F2FS_PROJINHERIT_FL;
 	fi->flags = 0;
 	fi->i_advise = ri->i_advise;
 	fi->i_pino = le32_to_cpu(ri->i_pino);
@@ -358,7 +358,7 @@ static int do_read_inode(struct inode *inode)
 
 	if (!sanity_check_inode(inode, node_page)) {
 		f2fs_put_page(node_page, 1);
-		return -EINVAL;
+		return -EFSCORRUPTED;
 	}
 
 	/* check data exist */
@@ -453,7 +453,7 @@ make_now:
 		inode->i_mapping->a_ops = &f2fs_dblock_aops;
 		inode_nohighmem(inode);
 	} else if (S_ISLNK(inode->i_mode)) {
-		if (f2fs_encrypted_inode(inode))
+		if (file_is_encrypt(inode))
 			inode->i_op = &f2fs_encrypted_symlink_inode_operations;
 		else
 			inode->i_op = &f2fs_symlink_inode_operations;
@@ -473,6 +473,7 @@ make_now:
 	return inode;
 
 bad_inode:
+	f2fs_inode_synced(inode);
 	iget_failed(inode);
 	trace_f2fs_iget_exit(inode, ret);
 	return ERR_PTR(ret);
@@ -766,8 +767,7 @@ void f2fs_handle_failed_inode(struct inode *inode)
 	err = f2fs_get_node_info(sbi, inode->i_ino, &ni);
 	if (err) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"May loss orphan inode, run fsck to fix.");
+		f2fs_warn(sbi, "May loss orphan inode, run fsck to fix.");
 		goto out;
 	}
 
@@ -775,8 +775,7 @@ void f2fs_handle_failed_inode(struct inode *inode)
 		err = f2fs_acquire_orphan_inode(sbi);
 		if (err) {
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"Too many orphan inodes, run fsck to fix.");
+			f2fs_warn(sbi, "Too many orphan inodes, run fsck to fix.");
 		} else {
 			f2fs_add_orphan_inode(inode);
 		}
diff --git a/fs/f2fs/namei.c b/fs/f2fs/namei.c
index 62d9829f3a6a..c5b99042e6f2 100644
--- a/fs/f2fs/namei.c
+++ b/fs/f2fs/namei.c
@@ -10,6 +10,7 @@
 #include <linux/pagemap.h>
 #include <linux/sched.h>
 #include <linux/ctype.h>
+#include <linux/random.h>
 #include <linux/dcache.h>
 #include <linux/namei.h>
 #include <linux/quotaops.h>
@@ -50,7 +51,7 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
 	inode->i_blocks = 0;
 	inode->i_mtime = inode->i_atime = inode->i_ctime = current_time(inode);
 	F2FS_I(inode)->i_crtime = inode->i_mtime;
-	inode->i_generation = sbi->s_next_generation++;
+	inode->i_generation = prandom_u32();
 
 	if (S_ISDIR(inode->i_mode))
 		F2FS_I(inode)->i_current_depth = 1;
@@ -75,7 +76,7 @@ static struct inode *f2fs_new_inode(struct inode *dir, umode_t mode)
 	set_inode_flag(inode, FI_NEW_INODE);
 
 	/* If the directory encrypted, then we should encrypt the inode. */
-	if ((f2fs_encrypted_inode(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) &&
+	if ((IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) &&
 				f2fs_may_encrypt(inode))
 		f2fs_set_encrypted_inode(inode);
 
@@ -142,7 +143,7 @@ fail_drop:
 	return ERR_PTR(err);
 }
 
-static int is_extension_exist(const unsigned char *s, const char *sub)
+static inline int is_extension_exist(const unsigned char *s, const char *sub)
 {
 	size_t slen = strlen(s);
 	size_t sublen = strlen(sub);
@@ -384,9 +385,8 @@ static int __recover_dot_dentries(struct inode *dir, nid_t pino)
 	int err = 0;
 
 	if (f2fs_readonly(sbi->sb)) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"skip recovering inline_dots inode (ino:%lu, pino:%u) "
-			"in readonly mountpoint", dir->i_ino, pino);
+		f2fs_info(sbi, "skip recovering inline_dots inode (ino:%lu, pino:%u) in readonly mountpoint",
+			  dir->i_ino, pino);
 		return 0;
 	}
 
@@ -435,19 +435,23 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 	nid_t ino = -1;
 	int err = 0;
 	unsigned int root_ino = F2FS_ROOT_INO(F2FS_I_SB(dir));
+	struct fscrypt_name fname;
 
 	trace_f2fs_lookup_start(dir, dentry, flags);
 
-	err = fscrypt_prepare_lookup(dir, dentry, flags);
-	if (err)
-		goto out;
-
 	if (dentry->d_name.len > F2FS_NAME_LEN) {
 		err = -ENAMETOOLONG;
 		goto out;
 	}
 
-	de = f2fs_find_entry(dir, &dentry->d_name, &page);
+	err = fscrypt_prepare_lookup(dir, dentry, &fname);
+	if (err == -ENOENT)
+		goto out_splice;
+	if (err)
+		goto out;
+	de = __f2fs_find_entry(dir, &fname, &page);
+	fscrypt_free_filename(&fname);
+
 	if (!de) {
 		if (IS_ERR(page)) {
 			err = PTR_ERR(page);
@@ -476,19 +480,17 @@ static struct dentry *f2fs_lookup(struct inode *dir, struct dentry *dentry,
 		if (err)
 			goto out_iput;
 	}
-	if (f2fs_encrypted_inode(dir) &&
+	if (IS_ENCRYPTED(dir) &&
 	    (S_ISDIR(inode->i_mode) || S_ISLNK(inode->i_mode)) &&
 	    !fscrypt_has_permitted_context(dir, inode)) {
-		f2fs_msg(inode->i_sb, KERN_WARNING,
-			 "Inconsistent encryption contexts: %lu/%lu",
-			 dir->i_ino, inode->i_ino);
+		f2fs_warn(F2FS_I_SB(inode), "Inconsistent encryption contexts: %lu/%lu",
+			  dir->i_ino, inode->i_ino);
 		err = -EPERM;
 		goto out_iput;
 	}
 out_splice:
 	new = d_splice_alias(inode, dentry);
-	if (IS_ERR(new))
-		err = PTR_ERR(new);
+	err = PTR_ERR_OR_ZERO(new);
 	trace_f2fs_lookup_end(dir, dentry, ino, err);
 	return new;
 out_iput:
@@ -803,7 +805,7 @@ static int f2fs_tmpfile(struct inode *dir, struct dentry *dentry, umode_t mode)
 	if (unlikely(f2fs_cp_error(sbi)))
 		return -EIO;
 
-	if (f2fs_encrypted_inode(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) {
+	if (IS_ENCRYPTED(dir) || DUMMY_ENCRYPTION_ENABLED(sbi)) {
 		int err = fscrypt_get_encryption_info(dir);
 		if (err)
 			return err;
diff --git a/fs/f2fs/node.c b/fs/f2fs/node.c
index 4f450e573312..a18b2a895771 100644
--- a/fs/f2fs/node.c
+++ b/fs/f2fs/node.c
@@ -34,10 +34,9 @@ int f2fs_check_nid_range(struct f2fs_sb_info *sbi, nid_t nid)
 {
 	if (unlikely(nid < F2FS_ROOT_INO(sbi) || nid >= NM_I(sbi)->max_nid)) {
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		f2fs_msg(sbi->sb, KERN_WARNING,
-				"%s: out-of-range nid=%x, run fsck to fix.",
-				__func__, nid);
-		return -EINVAL;
+		f2fs_warn(sbi, "%s: out-of-range nid=%x, run fsck to fix.",
+			  __func__, nid);
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -454,7 +453,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
 			new_blkaddr == NULL_ADDR);
 	f2fs_bug_on(sbi, nat_get_blkaddr(e) == NEW_ADDR &&
 			new_blkaddr == NEW_ADDR);
-	f2fs_bug_on(sbi, is_valid_data_blkaddr(sbi, nat_get_blkaddr(e)) &&
+	f2fs_bug_on(sbi, __is_valid_data_blkaddr(nat_get_blkaddr(e)) &&
 			new_blkaddr == NEW_ADDR);
 
 	/* increment version no as node is removed */
@@ -465,7 +464,7 @@ static void set_node_addr(struct f2fs_sb_info *sbi, struct node_info *ni,
 
 	/* change address */
 	nat_set_blkaddr(e, new_blkaddr);
-	if (!is_valid_data_blkaddr(sbi, new_blkaddr))
+	if (!__is_valid_data_blkaddr(new_blkaddr))
 		set_nat_flag(e, IS_CHECKPOINTED, false);
 	__set_nat_cache_dirty(nm_i, e);
 
@@ -526,6 +525,7 @@ int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid,
 	struct f2fs_nat_entry ne;
 	struct nat_entry *e;
 	pgoff_t index;
+	block_t blkaddr;
 	int i;
 
 	ni->nid = nid;
@@ -569,6 +569,11 @@ int f2fs_get_node_info(struct f2fs_sb_info *sbi, nid_t nid,
 	node_info_from_raw_nat(ni, &ne);
 	f2fs_put_page(page, 1);
 cache:
+	blkaddr = le32_to_cpu(ne.block_addr);
+	if (__is_valid_data_blkaddr(blkaddr) &&
+		!f2fs_is_valid_blkaddr(sbi, blkaddr, DATA_GENERIC_ENHANCE))
+		return -EFAULT;
+
 	/* cache nat entry */
 	cache_nat_entry(sbi, nid, &ne);
 	return 0;
@@ -600,9 +605,9 @@ static void f2fs_ra_node_pages(struct page *parent, int start, int n)
 pgoff_t f2fs_get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs)
 {
 	const long direct_index = ADDRS_PER_INODE(dn->inode);
-	const long direct_blks = ADDRS_PER_BLOCK;
-	const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK;
-	unsigned int skipped_unit = ADDRS_PER_BLOCK;
+	const long direct_blks = ADDRS_PER_BLOCK(dn->inode);
+	const long indirect_blks = ADDRS_PER_BLOCK(dn->inode) * NIDS_PER_BLOCK;
+	unsigned int skipped_unit = ADDRS_PER_BLOCK(dn->inode);
 	int cur_level = dn->cur_level;
 	int max_level = dn->max_level;
 	pgoff_t base = 0;
@@ -616,8 +621,10 @@ pgoff_t f2fs_get_next_page_offset(struct dnode_of_data *dn, pgoff_t pgofs)
 	switch (dn->max_level) {
 	case 3:
 		base += 2 * indirect_blks;
+		/* fall through */
 	case 2:
 		base += 2 * direct_blks;
+		/* fall through */
 	case 1:
 		base += direct_index;
 		break;
@@ -636,9 +643,9 @@ static int get_node_path(struct inode *inode, long block,
 				int offset[4], unsigned int noffset[4])
 {
 	const long direct_index = ADDRS_PER_INODE(inode);
-	const long direct_blks = ADDRS_PER_BLOCK;
+	const long direct_blks = ADDRS_PER_BLOCK(inode);
 	const long dptrs_per_blk = NIDS_PER_BLOCK;
-	const long indirect_blks = ADDRS_PER_BLOCK * NIDS_PER_BLOCK;
+	const long indirect_blks = ADDRS_PER_BLOCK(inode) * NIDS_PER_BLOCK;
 	const long dindirect_blks = indirect_blks * NIDS_PER_BLOCK;
 	int n = 0;
 	int level = 0;
@@ -1179,8 +1186,12 @@ int f2fs_remove_inode_page(struct inode *inode)
 		f2fs_put_dnode(&dn);
 		return -EIO;
 	}
-	f2fs_bug_on(F2FS_I_SB(inode),
-			inode->i_blocks != 0 && inode->i_blocks != 8);
+
+	if (unlikely(inode->i_blocks != 0 && inode->i_blocks != 8)) {
+		f2fs_warn(F2FS_I_SB(inode), "Inconsistent i_blocks, ino:%lu, iblocks:%llu",
+			  inode->i_ino, (unsigned long long)inode->i_blocks);
+		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
+	}
 
 	/* will put inode & node pages */
 	err = truncate_node(&dn);
@@ -1275,9 +1286,10 @@ static int read_node_page(struct page *page, int op_flags)
 	int err;
 
 	if (PageUptodate(page)) {
-#ifdef CONFIG_F2FS_CHECK_FS
-		f2fs_bug_on(sbi, !f2fs_inode_chksum_verify(sbi, page));
-#endif
+		if (!f2fs_inode_chksum_verify(sbi, page)) {
+			ClearPageUptodate(page);
+			return -EFSBADCRC;
+		}
 		return LOCKED_PAGE;
 	}
 
@@ -1360,16 +1372,15 @@ repeat:
 	}
 
 	if (!f2fs_inode_chksum_verify(sbi, page)) {
-		err = -EBADMSG;
+		err = -EFSBADCRC;
 		goto out_err;
 	}
 page_hit:
 	if(unlikely(nid != nid_of_node(page))) {
-		f2fs_msg(sbi->sb, KERN_WARNING, "inconsistent node block, "
-			"nid:%lu, node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]",
-			nid, nid_of_node(page), ino_of_node(page),
-			ofs_of_node(page), cpver_of_node(page),
-			next_blkaddr_of_node(page));
+		f2fs_warn(sbi, "inconsistent node block, nid:%lu, node_footer[nid:%u,ino:%u,ofs:%u,cpver:%llu,blkaddr:%u]",
+			  nid, nid_of_node(page), ino_of_node(page),
+			  ofs_of_node(page), cpver_of_node(page),
+			  next_blkaddr_of_node(page));
 		err = -EINVAL;
 out_err:
 		ClearPageUptodate(page);
@@ -1541,7 +1552,8 @@ static int __write_node_page(struct page *page, bool atomic, bool *submitted,
 	}
 
 	if (__is_valid_data_blkaddr(ni.blk_addr) &&
-		!f2fs_is_valid_blkaddr(sbi, ni.blk_addr, DATA_GENERIC)) {
+		!f2fs_is_valid_blkaddr(sbi, ni.blk_addr,
+					DATA_GENERIC_ENHANCE)) {
 		up_read(&sbi->node_write);
 		goto redirty_out;
 	}
@@ -1736,9 +1748,8 @@ continue_unlock:
 			break;
 	}
 	if (!ret && atomic && !marked) {
-		f2fs_msg(sbi->sb, KERN_DEBUG,
-			"Retry to write fsync mark: ino=%u, idx=%lx",
-					ino, last_page->index);
+		f2fs_debug(sbi, "Retry to write fsync mark: ino=%u, idx=%lx",
+			   ino, last_page->index);
 		lock_page(last_page);
 		f2fs_wait_on_page_writeback(last_page, NODE, true, true);
 		set_page_dirty(last_page);
@@ -1920,7 +1931,9 @@ static int f2fs_write_node_pages(struct address_space *mapping,
 	f2fs_balance_fs_bg(sbi);
 
 	/* collect a number of dirty node pages and write together */
-	if (get_pages(sbi, F2FS_DIRTY_NODES) < nr_pages_to_skip(sbi, NODE))
+	if (wbc->sync_mode != WB_SYNC_ALL &&
+			get_pages(sbi, F2FS_DIRTY_NODES) <
+					nr_pages_to_skip(sbi, NODE))
 		goto skip_write;
 
 	if (wbc->sync_mode == WB_SYNC_ALL)
@@ -1959,7 +1972,7 @@ static int f2fs_set_node_page_dirty(struct page *page)
 	if (!PageDirty(page)) {
 		__set_page_dirty_nobuffers(page);
 		inc_page_count(F2FS_P_SB(page), F2FS_DIRTY_NODES);
-		SetPagePrivate(page);
+		f2fs_set_page_private(page, 0);
 		f2fs_trace_pid(page);
 		return 1;
 	}
@@ -2074,6 +2087,9 @@ static bool add_free_nid(struct f2fs_sb_info *sbi,
 	if (unlikely(nid == 0))
 		return false;
 
+	if (unlikely(f2fs_check_nid_range(sbi, nid)))
+		return false;
+
 	i = f2fs_kmem_cache_alloc(free_nid_slab, GFP_NOFS);
 	i->nid = nid;
 	i->state = FREE_NID;
@@ -2283,8 +2299,7 @@ static int __f2fs_build_free_nids(struct f2fs_sb_info *sbi,
 			if (ret) {
 				up_read(&nm_i->nat_tree_lock);
 				f2fs_bug_on(sbi, !mount);
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"NAT is corrupt, run fsck to fix it");
+				f2fs_err(sbi, "NAT is corrupt, run fsck to fix it");
 				return ret;
 			}
 		}
@@ -2704,7 +2719,7 @@ static void __update_nat_bits(struct f2fs_sb_info *sbi, nid_t start_nid,
 		i = 1;
 	}
 	for (; i < NAT_ENTRY_PER_BLOCK; i++) {
-		if (nat_blk->entries[i].block_addr != NULL_ADDR)
+		if (le32_to_cpu(nat_blk->entries[i].block_addr) != NULL_ADDR)
 			valid++;
 	}
 	if (valid == 0) {
@@ -2894,7 +2909,7 @@ static int __get_nat_bitmaps(struct f2fs_sb_info *sbi)
 	nm_i->full_nat_bits = nm_i->nat_bits + 8;
 	nm_i->empty_nat_bits = nm_i->full_nat_bits + nat_bits_bytes;
 
-	f2fs_msg(sbi->sb, KERN_NOTICE, "Found nat_bits in checkpoint");
+	f2fs_notice(sbi, "Found nat_bits in checkpoint");
 	return 0;
 }
 
diff --git a/fs/f2fs/recovery.c b/fs/f2fs/recovery.c
index e3883db868d8..783773e4560d 100644
--- a/fs/f2fs/recovery.c
+++ b/fs/f2fs/recovery.c
@@ -188,10 +188,9 @@ out:
 		name = "<encrypted>";
 	else
 		name = raw_inode->i_name;
-	f2fs_msg(inode->i_sb, KERN_NOTICE,
-			"%s: ino = %x, name = %s, dir = %lx, err = %d",
-			__func__, ino_of_node(ipage), name,
-			IS_ERR(dir) ? 0 : dir->i_ino, err);
+	f2fs_notice(F2FS_I_SB(inode), "%s: ino = %x, name = %s, dir = %lx, err = %d",
+		    __func__, ino_of_node(ipage), name,
+		    IS_ERR(dir) ? 0 : dir->i_ino, err);
 	return err;
 }
 
@@ -292,9 +291,8 @@ static int recover_inode(struct inode *inode, struct page *page)
 	else
 		name = F2FS_INODE(page)->i_name;
 
-	f2fs_msg(inode->i_sb, KERN_NOTICE,
-		"recover_inode: ino = %x, name = %s, inline = %x",
-			ino_of_node(page), name, raw->i_inline);
+	f2fs_notice(F2FS_I_SB(inode), "recover_inode: ino = %x, name = %s, inline = %x",
+		    ino_of_node(page), name, raw->i_inline);
 	return 0;
 }
 
@@ -325,8 +323,10 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
 			break;
 		}
 
-		if (!is_recoverable_dnode(page))
+		if (!is_recoverable_dnode(page)) {
+			f2fs_put_page(page, 1);
 			break;
+		}
 
 		if (!is_fsync_dnode(page))
 			goto next;
@@ -338,8 +338,10 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
 			if (!check_only &&
 					IS_INODE(page) && is_dent_dnode(page)) {
 				err = f2fs_recover_inode_page(sbi, page);
-				if (err)
+				if (err) {
+					f2fs_put_page(page, 1);
 					break;
+				}
 				quota_inode = true;
 			}
 
@@ -355,6 +357,7 @@ static int find_fsync_dnodes(struct f2fs_sb_info *sbi, struct list_head *head,
 					err = 0;
 					goto next;
 				}
+				f2fs_put_page(page, 1);
 				break;
 			}
 		}
@@ -366,10 +369,10 @@ next:
 		/* sanity check in order to detect looped node chain */
 		if (++loop_cnt >= free_blocks ||
 			blkaddr == next_blkaddr_of_node(page)) {
-			f2fs_msg(sbi->sb, KERN_NOTICE,
-				"%s: detect looped node chain, "
-				"blkaddr:%u, next:%u",
-				__func__, blkaddr, next_blkaddr_of_node(page));
+			f2fs_notice(sbi, "%s: detect looped node chain, blkaddr:%u, next:%u",
+				    __func__, blkaddr,
+				    next_blkaddr_of_node(page));
+			f2fs_put_page(page, 1);
 			err = -EINVAL;
 			break;
 		}
@@ -380,7 +383,6 @@ next:
 
 		f2fs_ra_meta_pages_cond(sbi, blkaddr);
 	}
-	f2fs_put_page(page, 1);
 	return err;
 }
 
@@ -546,7 +548,14 @@ retry_dn:
 		goto err;
 
 	f2fs_bug_on(sbi, ni.ino != ino_of_node(page));
-	f2fs_bug_on(sbi, ofs_of_node(dn.node_page) != ofs_of_node(page));
+
+	if (ofs_of_node(dn.node_page) != ofs_of_node(page)) {
+		f2fs_warn(sbi, "Inconsistent ofs_of_node, ino:%lu, ofs:%u, %u",
+			  inode->i_ino, ofs_of_node(dn.node_page),
+			  ofs_of_node(page));
+		err = -EFSCORRUPTED;
+		goto err;
+	}
 
 	for (; start < end; start++, dn.ofs_in_node++) {
 		block_t src, dest;
@@ -554,6 +563,18 @@ retry_dn:
 		src = datablock_addr(dn.inode, dn.node_page, dn.ofs_in_node);
 		dest = datablock_addr(dn.inode, page, dn.ofs_in_node);
 
+		if (__is_valid_data_blkaddr(src) &&
+			!f2fs_is_valid_blkaddr(sbi, src, META_POR)) {
+			err = -EFSCORRUPTED;
+			goto err;
+		}
+
+		if (__is_valid_data_blkaddr(dest) &&
+			!f2fs_is_valid_blkaddr(sbi, dest, META_POR)) {
+			err = -EFSCORRUPTED;
+			goto err;
+		}
+
 		/* skip recovering if dest is the same as src */
 		if (src == dest)
 			continue;
@@ -617,11 +638,9 @@ retry_prev:
 err:
 	f2fs_put_dnode(&dn);
 out:
-	f2fs_msg(sbi->sb, KERN_NOTICE,
-		"recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d",
-		inode->i_ino,
-		file_keep_isize(inode) ? "keep" : "recover",
-		recovered, err);
+	f2fs_notice(sbi, "recover_data: ino = %lx (i_size: %s) recovered = %d, err = %d",
+		    inode->i_ino, file_keep_isize(inode) ? "keep" : "recover",
+		    recovered, err);
 	return err;
 }
 
@@ -666,8 +685,10 @@ static int recover_data(struct f2fs_sb_info *sbi, struct list_head *inode_list,
 		 */
 		if (IS_INODE(page)) {
 			err = recover_inode(entry->inode, page);
-			if (err)
+			if (err) {
+				f2fs_put_page(page, 1);
 				break;
+			}
 		}
 		if (entry->last_dentry == blkaddr) {
 			err = recover_dentry(entry->inode, page, dir_list);
@@ -707,8 +728,7 @@ int f2fs_recover_fsync_data(struct f2fs_sb_info *sbi, bool check_only)
 #endif
 
 	if (s_flags & SB_RDONLY) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-				"recover fsync data on readonly fs");
+		f2fs_info(sbi, "recover fsync data on readonly fs");
 		sbi->sb->s_flags &= ~SB_RDONLY;
 	}
 
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 9b79056d705d..a661ac32e829 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -191,8 +191,7 @@ void f2fs_register_inmem_page(struct inode *inode, struct page *page)
 
 	f2fs_trace_pid(page);
 
-	set_page_private(page, (unsigned long)ATOMIC_WRITTEN_PAGE);
-	SetPagePrivate(page);
+	f2fs_set_page_private(page, (unsigned long)ATOMIC_WRITTEN_PAGE);
 
 	new = f2fs_kmem_cache_alloc(inmem_entry_slab, GFP_NOFS);
 
@@ -215,7 +214,8 @@ void f2fs_register_inmem_page(struct inode *inode, struct page *page)
 }
 
 static int __revoke_inmem_pages(struct inode *inode,
-				struct list_head *head, bool drop, bool recover)
+				struct list_head *head, bool drop, bool recover,
+				bool trylock)
 {
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct inmem_pages *cur, *tmp;
@@ -227,7 +227,16 @@ static int __revoke_inmem_pages(struct inode *inode,
 		if (drop)
 			trace_f2fs_commit_inmem_page(page, INMEM_DROP);
 
-		lock_page(page);
+		if (trylock) {
+			/*
+			 * to avoid deadlock in between page lock and
+			 * inmem_lock.
+			 */
+			if (!trylock_page(page))
+				continue;
+		} else {
+			lock_page(page);
+		}
 
 		f2fs_wait_on_page_writeback(page, DATA, true, true);
 
@@ -270,8 +279,7 @@ next:
 			ClearPageUptodate(page);
 			clear_cold_data(page);
 		}
-		set_page_private(page, 0);
-		ClearPagePrivate(page);
+		f2fs_clear_page_private(page);
 		f2fs_put_page(page, 1);
 
 		list_del(&cur->list);
@@ -318,13 +326,19 @@ void f2fs_drop_inmem_pages(struct inode *inode)
 	struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
 	struct f2fs_inode_info *fi = F2FS_I(inode);
 
-	mutex_lock(&fi->inmem_lock);
-	__revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
-	spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
-	if (!list_empty(&fi->inmem_ilist))
-		list_del_init(&fi->inmem_ilist);
-	spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
-	mutex_unlock(&fi->inmem_lock);
+	while (!list_empty(&fi->inmem_pages)) {
+		mutex_lock(&fi->inmem_lock);
+		__revoke_inmem_pages(inode, &fi->inmem_pages,
+						true, false, true);
+
+		if (list_empty(&fi->inmem_pages)) {
+			spin_lock(&sbi->inode_lock[ATOMIC_FILE]);
+			if (!list_empty(&fi->inmem_ilist))
+				list_del_init(&fi->inmem_ilist);
+			spin_unlock(&sbi->inode_lock[ATOMIC_FILE]);
+		}
+		mutex_unlock(&fi->inmem_lock);
+	}
 
 	clear_inode_flag(inode, FI_ATOMIC_FILE);
 	fi->i_gc_failures[GC_FAILURE_ATOMIC] = 0;
@@ -354,8 +368,7 @@ void f2fs_drop_inmem_page(struct inode *inode, struct page *page)
 	kmem_cache_free(inmem_entry_slab, cur);
 
 	ClearPageUptodate(page);
-	set_page_private(page, 0);
-	ClearPagePrivate(page);
+	f2fs_clear_page_private(page);
 	f2fs_put_page(page, 0);
 
 	trace_f2fs_commit_inmem_page(page, INMEM_INVALIDATE);
@@ -429,12 +442,15 @@ retry:
 		 * recovery or rewrite & commit last transaction. For other
 		 * error number, revoking was done by filesystem itself.
 		 */
-		err = __revoke_inmem_pages(inode, &revoke_list, false, true);
+		err = __revoke_inmem_pages(inode, &revoke_list,
+						false, true, false);
 
 		/* drop all uncommitted pages */
-		__revoke_inmem_pages(inode, &fi->inmem_pages, true, false);
+		__revoke_inmem_pages(inode, &fi->inmem_pages,
+						true, false, false);
 	} else {
-		__revoke_inmem_pages(inode, &revoke_list, false, false);
+		__revoke_inmem_pages(inode, &revoke_list,
+						false, false, false);
 	}
 
 	return err;
@@ -530,9 +546,13 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
 		if (test_opt(sbi, DATA_FLUSH)) {
 			struct blk_plug plug;
 
+			mutex_lock(&sbi->flush_lock);
+
 			blk_start_plug(&plug);
 			f2fs_sync_dirty_inodes(sbi, FILE_INODE);
 			blk_finish_plug(&plug);
+
+			mutex_unlock(&sbi->flush_lock);
 		}
 		f2fs_sync_fs(sbi->sb, true);
 		stat_inc_bg_cp_count(sbi->stat_info);
@@ -542,9 +562,13 @@ void f2fs_balance_fs_bg(struct f2fs_sb_info *sbi)
 static int __submit_flush_wait(struct f2fs_sb_info *sbi,
 				struct block_device *bdev)
 {
-	struct bio *bio = f2fs_bio_alloc(sbi, 0, true);
+	struct bio *bio;
 	int ret;
 
+	bio = f2fs_bio_alloc(sbi, 0, false);
+	if (!bio)
+		return -ENOMEM;
+
 	bio->bi_opf = REQ_OP_WRITE | REQ_SYNC | REQ_PREFLUSH;
 	bio_set_dev(bio, bdev);
 	ret = submit_bio_wait(bio);
@@ -560,7 +584,7 @@ static int submit_flush_wait(struct f2fs_sb_info *sbi, nid_t ino)
 	int ret = 0;
 	int i;
 
-	if (!sbi->s_ndevs)
+	if (!f2fs_is_multi_device(sbi))
 		return __submit_flush_wait(sbi, sbi->sb->s_bdev);
 
 	for (i = 0; i < sbi->s_ndevs; i++) {
@@ -628,7 +652,8 @@ int f2fs_issue_flush(struct f2fs_sb_info *sbi, nid_t ino)
 		return ret;
 	}
 
-	if (atomic_inc_return(&fcc->queued_flush) == 1 || sbi->s_ndevs > 1) {
+	if (atomic_inc_return(&fcc->queued_flush) == 1 ||
+	    f2fs_is_multi_device(sbi)) {
 		ret = submit_flush_wait(sbi, ino);
 		atomic_dec(&fcc->queued_flush);
 
@@ -734,7 +759,7 @@ int f2fs_flush_device_cache(struct f2fs_sb_info *sbi)
 {
 	int ret = 0, i;
 
-	if (!sbi->s_ndevs)
+	if (!f2fs_is_multi_device(sbi))
 		return 0;
 
 	for (i = 1; i < sbi->s_ndevs; i++) {
@@ -848,11 +873,14 @@ void f2fs_dirty_to_prefree(struct f2fs_sb_info *sbi)
 	mutex_unlock(&dirty_i->seglist_lock);
 }
 
-int f2fs_disable_cp_again(struct f2fs_sb_info *sbi)
+block_t f2fs_get_unusable_blocks(struct f2fs_sb_info *sbi)
 {
+	int ovp_hole_segs =
+		(overprovision_segments(sbi) - reserved_segments(sbi));
+	block_t ovp_holes = ovp_hole_segs << sbi->log_blocks_per_seg;
 	struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
-	block_t ovp = overprovision_segments(sbi) << sbi->log_blocks_per_seg;
 	block_t holes[2] = {0, 0};	/* DATA and NODE */
+	block_t unusable;
 	struct seg_entry *se;
 	unsigned int segno;
 
@@ -866,7 +894,20 @@ int f2fs_disable_cp_again(struct f2fs_sb_info *sbi)
 	}
 	mutex_unlock(&dirty_i->seglist_lock);
 
-	if (holes[DATA] > ovp || holes[NODE] > ovp)
+	unusable = holes[DATA] > holes[NODE] ? holes[DATA] : holes[NODE];
+	if (unusable > ovp_holes)
+		return unusable - ovp_holes;
+	return 0;
+}
+
+int f2fs_disable_cp_again(struct f2fs_sb_info *sbi, block_t unusable)
+{
+	int ovp_hole_segs =
+		(overprovision_segments(sbi) - reserved_segments(sbi));
+	if (unusable > F2FS_OPTION(sbi).unusable_cap)
+		return -EAGAIN;
+	if (is_sbi_flag_set(sbi, SBI_CP_DISABLED_QUICK) &&
+		dirty_segments(sbi) > ovp_hole_segs)
 		return -EAGAIN;
 	return 0;
 }
@@ -1037,6 +1078,7 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
 
 	dpolicy->max_requests = DEF_MAX_DISCARD_REQUEST;
 	dpolicy->io_aware_gran = MAX_PLIST_NUM;
+	dpolicy->timeout = 0;
 
 	if (discard_type == DPOLICY_BG) {
 		dpolicy->min_interval = DEF_MIN_DISCARD_ISSUE_TIME;
@@ -1059,6 +1101,8 @@ static void __init_discard_policy(struct f2fs_sb_info *sbi,
 	} else if (discard_type == DPOLICY_UMOUNT) {
 		dpolicy->max_requests = UINT_MAX;
 		dpolicy->io_aware = false;
+		/* we need to issue all to keep CP_TRIMMED_FLAG */
+		dpolicy->granularity = 1;
 	}
 }
 
@@ -1341,9 +1385,12 @@ static int __queue_discard_cmd(struct f2fs_sb_info *sbi,
 {
 	block_t lblkstart = blkstart;
 
+	if (!f2fs_bdev_support_discard(bdev))
+		return 0;
+
 	trace_f2fs_queue_discard(bdev, blkstart, blklen);
 
-	if (sbi->s_ndevs) {
+	if (f2fs_is_multi_device(sbi)) {
 		int devi = f2fs_target_device_index(sbi, blkstart);
 
 		blkstart -= FDEV(devi).start_blk;
@@ -1424,7 +1471,14 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
 	int i, issued = 0;
 	bool io_interrupted = false;
 
+	if (dpolicy->timeout != 0)
+		f2fs_update_time(sbi, dpolicy->timeout);
+
 	for (i = MAX_PLIST_NUM - 1; i >= 0; i--) {
+		if (dpolicy->timeout != 0 &&
+				f2fs_time_over(sbi, dpolicy->timeout))
+			break;
+
 		if (i + 1 < dpolicy->granularity)
 			break;
 
@@ -1443,6 +1497,10 @@ static int __issue_discard_cmd(struct f2fs_sb_info *sbi,
 		list_for_each_entry_safe(dc, tmp, pend_list, list) {
 			f2fs_bug_on(sbi, dc->state != D_PREP);
 
+			if (dpolicy->timeout != 0 &&
+				f2fs_time_over(sbi, dpolicy->timeout))
+				break;
+
 			if (dpolicy->io_aware && i < dpolicy->io_aware_gran &&
 						!is_idle(sbi, DISCARD_TIME)) {
 				io_interrupted = true;
@@ -1611,7 +1669,7 @@ void f2fs_stop_discard_thread(struct f2fs_sb_info *sbi)
 }
 
 /* This comes from f2fs_put_super */
-bool f2fs_wait_discard_bios(struct f2fs_sb_info *sbi)
+bool f2fs_issue_discard_timeout(struct f2fs_sb_info *sbi)
 {
 	struct discard_cmd_control *dcc = SM_I(sbi)->dcc_info;
 	struct discard_policy dpolicy;
@@ -1619,6 +1677,7 @@ bool f2fs_wait_discard_bios(struct f2fs_sb_info *sbi)
 
 	__init_discard_policy(sbi, &dpolicy, DPOLICY_UMOUNT,
 					dcc->discard_granularity);
+	dpolicy.timeout = UMOUNT_DISCARD_TIMEOUT;
 	__issue_discard_cmd(sbi, &dpolicy);
 	dropped = __drop_discard_cmd(sbi);
 
@@ -1698,42 +1757,34 @@ static int __f2fs_issue_discard_zone(struct f2fs_sb_info *sbi,
 	block_t lblkstart = blkstart;
 	int devi = 0;
 
-	if (sbi->s_ndevs) {
+	if (f2fs_is_multi_device(sbi)) {
 		devi = f2fs_target_device_index(sbi, blkstart);
+		if (blkstart < FDEV(devi).start_blk ||
+		    blkstart > FDEV(devi).end_blk) {
+			f2fs_err(sbi, "Invalid block %x", blkstart);
+			return -EIO;
+		}
 		blkstart -= FDEV(devi).start_blk;
 	}
 
-	/*
-	 * We need to know the type of the zone: for conventional zones,
-	 * use regular discard if the drive supports it. For sequential
-	 * zones, reset the zone write pointer.
-	 */
-	switch (get_blkz_type(sbi, bdev, blkstart)) {
-
-	case BLK_ZONE_TYPE_CONVENTIONAL:
-		if (!blk_queue_discard(bdev_get_queue(bdev)))
-			return 0;
-		return __queue_discard_cmd(sbi, bdev, lblkstart, blklen);
-	case BLK_ZONE_TYPE_SEQWRITE_REQ:
-	case BLK_ZONE_TYPE_SEQWRITE_PREF:
+	/* For sequential zones, reset the zone write pointer */
+	if (f2fs_blkz_is_seq(sbi, devi, blkstart)) {
 		sector = SECTOR_FROM_BLOCK(blkstart);
 		nr_sects = SECTOR_FROM_BLOCK(blklen);
 
 		if (sector & (bdev_zone_sectors(bdev) - 1) ||
 				nr_sects != bdev_zone_sectors(bdev)) {
-			f2fs_msg(sbi->sb, KERN_INFO,
-				"(%d) %s: Unaligned discard attempted (block %x + %x)",
-				devi, sbi->s_ndevs ? FDEV(devi).path: "",
-				blkstart, blklen);
+			f2fs_err(sbi, "(%d) %s: Unaligned zone reset attempted (block %x + %x)",
+				 devi, sbi->s_ndevs ? FDEV(devi).path : "",
+				 blkstart, blklen);
 			return -EIO;
 		}
 		trace_f2fs_issue_reset_zone(bdev, blkstart);
-		return blkdev_reset_zones(bdev, sector,
-					  nr_sects, GFP_NOFS);
-	default:
-		/* Unknown zone type: broken device ? */
-		return -EIO;
+		return blkdev_reset_zones(bdev, sector, nr_sects, GFP_NOFS);
 	}
+
+	/* For conventional zones, use regular discard if supported */
+	return __queue_discard_cmd(sbi, bdev, lblkstart, blklen);
 }
 #endif
 
@@ -1741,8 +1792,7 @@ static int __issue_discard_async(struct f2fs_sb_info *sbi,
 		struct block_device *bdev, block_t blkstart, block_t blklen)
 {
 #ifdef CONFIG_BLK_DEV_ZONED
-	if (f2fs_sb_has_blkzoned(sbi) &&
-				bdev_zoned_model(bdev) != BLK_ZONED_NONE)
+	if (f2fs_sb_has_blkzoned(sbi) && bdev_is_zoned(bdev))
 		return __f2fs_issue_discard_zone(sbi, bdev, blkstart, blklen);
 #endif
 	return __queue_discard_cmd(sbi, bdev, blkstart, blklen);
@@ -2090,15 +2140,14 @@ static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
 		mir_exist = f2fs_test_and_set_bit(offset,
 						se->cur_valid_map_mir);
 		if (unlikely(exist != mir_exist)) {
-			f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
-				"when setting bitmap, blk:%u, old bit:%d",
-				blkaddr, exist);
+			f2fs_err(sbi, "Inconsistent error when setting bitmap, blk:%u, old bit:%d",
+				 blkaddr, exist);
 			f2fs_bug_on(sbi, 1);
 		}
 #endif
 		if (unlikely(exist)) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-				"Bitmap was wrongly set, blk:%u", blkaddr);
+			f2fs_err(sbi, "Bitmap was wrongly set, blk:%u",
+				 blkaddr);
 			f2fs_bug_on(sbi, 1);
 			se->valid_blocks--;
 			del = 0;
@@ -2119,15 +2168,14 @@ static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
 		mir_exist = f2fs_test_and_clear_bit(offset,
 						se->cur_valid_map_mir);
 		if (unlikely(exist != mir_exist)) {
-			f2fs_msg(sbi->sb, KERN_ERR, "Inconsistent error "
-				"when clearing bitmap, blk:%u, old bit:%d",
-				blkaddr, exist);
+			f2fs_err(sbi, "Inconsistent error when clearing bitmap, blk:%u, old bit:%d",
+				 blkaddr, exist);
 			f2fs_bug_on(sbi, 1);
 		}
 #endif
 		if (unlikely(!exist)) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-				"Bitmap was wrongly cleared, blk:%u", blkaddr);
+			f2fs_err(sbi, "Bitmap was wrongly cleared, blk:%u",
+				 blkaddr);
 			f2fs_bug_on(sbi, 1);
 			se->valid_blocks++;
 			del = 0;
@@ -2138,8 +2186,11 @@ static void update_sit_entry(struct f2fs_sb_info *sbi, block_t blkaddr, int del)
 			 * before, we must track that to know how much space we
 			 * really have.
 			 */
-			if (f2fs_test_bit(offset, se->ckpt_valid_map))
+			if (f2fs_test_bit(offset, se->ckpt_valid_map)) {
+				spin_lock(&sbi->stat_lock);
 				sbi->unusable_block_count++;
+				spin_unlock(&sbi->stat_lock);
+			}
 		}
 
 		if (f2fs_test_and_clear_bit(offset, se->discard_map))
@@ -2186,7 +2237,7 @@ bool f2fs_is_checkpointed_data(struct f2fs_sb_info *sbi, block_t blkaddr)
 	struct seg_entry *se;
 	bool is_cp = false;
 
-	if (!is_valid_data_blkaddr(sbi, blkaddr))
+	if (!__is_valid_data_blkaddr(blkaddr))
 		return true;
 
 	down_read(&sit_i->sentry_lock);
@@ -2606,6 +2657,39 @@ static void allocate_segment_by_default(struct f2fs_sb_info *sbi,
 	stat_inc_seg_type(sbi, curseg);
 }
 
+void allocate_segment_for_resize(struct f2fs_sb_info *sbi, int type,
+					unsigned int start, unsigned int end)
+{
+	struct curseg_info *curseg = CURSEG_I(sbi, type);
+	unsigned int segno;
+
+	down_read(&SM_I(sbi)->curseg_lock);
+	mutex_lock(&curseg->curseg_mutex);
+	down_write(&SIT_I(sbi)->sentry_lock);
+
+	segno = CURSEG_I(sbi, type)->segno;
+	if (segno < start || segno > end)
+		goto unlock;
+
+	if (f2fs_need_SSR(sbi) && get_ssr_segment(sbi, type))
+		change_curseg(sbi, type);
+	else
+		new_curseg(sbi, type, true);
+
+	stat_inc_seg_type(sbi, curseg);
+
+	locate_dirty_segment(sbi, segno);
+unlock:
+	up_write(&SIT_I(sbi)->sentry_lock);
+
+	if (segno != curseg->segno)
+		f2fs_notice(sbi, "For resize: curseg of type %d: %u ==> %u",
+			    type, segno, curseg->segno);
+
+	mutex_unlock(&curseg->curseg_mutex);
+	up_read(&SM_I(sbi)->curseg_lock);
+}
+
 void f2fs_allocate_new_segments(struct f2fs_sb_info *sbi)
 {
 	struct curseg_info *curseg;
@@ -2738,9 +2822,8 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
 		goto out;
 
 	if (is_sbi_flag_set(sbi, SBI_NEED_FSCK)) {
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"Found FS corruption, run fsck to fix.");
-		return -EIO;
+		f2fs_warn(sbi, "Found FS corruption, run fsck to fix.");
+		return -EFSCORRUPTED;
 	}
 
 	/* start/end segment number in main_area */
@@ -3055,7 +3138,7 @@ static void update_device_state(struct f2fs_io_info *fio)
 	struct f2fs_sb_info *sbi = fio->sbi;
 	unsigned int devidx;
 
-	if (!sbi->s_ndevs)
+	if (!f2fs_is_multi_device(sbi))
 		return;
 
 	devidx = f2fs_target_device_index(sbi, fio->new_blkaddr);
@@ -3153,21 +3236,31 @@ int f2fs_inplace_write_data(struct f2fs_io_info *fio)
 {
 	int err;
 	struct f2fs_sb_info *sbi = fio->sbi;
+	unsigned int segno;
 
 	fio->new_blkaddr = fio->old_blkaddr;
 	/* i/o temperature is needed for passing down write hints */
 	__get_segment_type(fio);
 
-	f2fs_bug_on(sbi, !IS_DATASEG(get_seg_entry(sbi,
-			GET_SEGNO(sbi, fio->new_blkaddr))->type));
+	segno = GET_SEGNO(sbi, fio->new_blkaddr);
+
+	if (!IS_DATASEG(get_seg_entry(sbi, segno)->type)) {
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
+		f2fs_warn(sbi, "%s: incorrect segment(%u) type, run fsck to fix.",
+			  __func__, segno);
+		return -EFSCORRUPTED;
+	}
 
 	stat_inc_inplace_blocks(fio->sbi);
 
-	err = f2fs_submit_page_bio(fio);
-	if (!err)
+	if (fio->bio)
+		err = f2fs_merge_page_bio(fio);
+	else
+		err = f2fs_submit_page_bio(fio);
+	if (!err) {
 		update_device_state(fio);
-
-	f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
+		f2fs_update_iostat(fio->sbi, fio->io_type, F2FS_BLKSIZE);
+	}
 
 	return err;
 }
@@ -3302,7 +3395,7 @@ void f2fs_wait_on_block_writeback(struct inode *inode, block_t blkaddr)
 	if (!f2fs_post_read_required(inode))
 		return;
 
-	if (!is_valid_data_blkaddr(sbi, blkaddr))
+	if (!__is_valid_data_blkaddr(blkaddr))
 		return;
 
 	cpage = find_lock_page(META_MAPPING(sbi), blkaddr);
@@ -3354,6 +3447,11 @@ static int read_compacted_summaries(struct f2fs_sb_info *sbi)
 		seg_i = CURSEG_I(sbi, i);
 		segno = le32_to_cpu(ckpt->cur_data_segno[i]);
 		blk_off = le16_to_cpu(ckpt->cur_data_blkoff[i]);
+		if (blk_off > ENTRIES_IN_SUM) {
+			f2fs_bug_on(sbi, 1);
+			f2fs_put_page(page, 1);
+			return -EFAULT;
+		}
 		seg_i->next_segno = segno;
 		reset_curseg(sbi, i, 0);
 		seg_i->alloc_type = ckpt->alloc_type[i];
@@ -3491,8 +3589,11 @@ static int restore_curseg_summaries(struct f2fs_sb_info *sbi)
 
 	/* sanity check for summary blocks */
 	if (nats_in_cursum(nat_j) > NAT_JOURNAL_ENTRIES ||
-			sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES)
+			sits_in_cursum(sit_j) > SIT_JOURNAL_ENTRIES) {
+		f2fs_err(sbi, "invalid journal entries nats %u sits %u\n",
+			 nats_in_cursum(nat_j), sits_in_cursum(sit_j));
 		return -EINVAL;
+	}
 
 	return 0;
 }
@@ -3723,7 +3824,7 @@ void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	struct f2fs_journal *journal = curseg->journal;
 	struct sit_entry_set *ses, *tmp;
 	struct list_head *head = &SM_I(sbi)->sit_entry_set;
-	bool to_journal = true;
+	bool to_journal = !is_sbi_flag_set(sbi, SBI_IS_RESIZEFS);
 	struct seg_entry *se;
 
 	down_write(&sit_i->sentry_lock);
@@ -3742,7 +3843,8 @@ void f2fs_flush_sit_entries(struct f2fs_sb_info *sbi, struct cp_control *cpc)
 	 * entries, remove all entries from journal and add and account
 	 * them in sit entry set.
 	 */
-	if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL))
+	if (!__has_cursum_space(journal, sit_i->dirty_sentries, SIT_JOURNAL) ||
+								!to_journal)
 		remove_sits_in_journal(sbi);
 
 	/*
@@ -4057,11 +4159,10 @@ static int build_sit_entries(struct f2fs_sb_info *sbi)
 
 		start = le32_to_cpu(segno_in_journal(journal, i));
 		if (start >= MAIN_SEGS(sbi)) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-					"Wrong journal entry on segno %u",
-					start);
+			f2fs_err(sbi, "Wrong journal entry on segno %u",
+				 start);
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
-			err = -EINVAL;
+			err = -EFSCORRUPTED;
 			break;
 		}
 
@@ -4098,11 +4199,10 @@ static int build_sit_entries(struct f2fs_sb_info *sbi)
 	up_read(&curseg->journal_rwsem);
 
 	if (!err && total_node_blocks != valid_node_count(sbi)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"SIT is corrupted node# %u vs %u",
-			total_node_blocks, valid_node_count(sbi));
+		f2fs_err(sbi, "SIT is corrupted node# %u vs %u",
+			 total_node_blocks, valid_node_count(sbi));
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		err = -EINVAL;
+		err = -EFSCORRUPTED;
 	}
 
 	return err;
@@ -4193,6 +4293,39 @@ static int build_dirty_segmap(struct f2fs_sb_info *sbi)
 	return init_victim_secmap(sbi);
 }
 
+static int sanity_check_curseg(struct f2fs_sb_info *sbi)
+{
+	int i;
+
+	/*
+	 * In LFS/SSR curseg, .next_blkoff should point to an unused blkaddr;
+	 * In LFS curseg, all blkaddr after .next_blkoff should be unused.
+	 */
+	for (i = 0; i < NO_CHECK_TYPE; i++) {
+		struct curseg_info *curseg = CURSEG_I(sbi, i);
+		struct seg_entry *se = get_seg_entry(sbi, curseg->segno);
+		unsigned int blkofs = curseg->next_blkoff;
+
+		if (f2fs_test_bit(blkofs, se->cur_valid_map))
+			goto out;
+
+		if (curseg->alloc_type == SSR)
+			continue;
+
+		for (blkofs += 1; blkofs < sbi->blocks_per_seg; blkofs++) {
+			if (!f2fs_test_bit(blkofs, se->cur_valid_map))
+				continue;
+out:
+			f2fs_err(sbi,
+				 "Current segment's next free block offset is inconsistent with bitmap, logtype:%u, segno:%u, type:%u, next_blkoff:%u, blkofs:%u",
+				 i, curseg->segno, curseg->alloc_type,
+				 curseg->next_blkoff, blkofs);
+			return -EFSCORRUPTED;
+		}
+	}
+	return 0;
+}
+
 /*
  * Update min, max modified time for cost-benefit GC algorithm
  */
@@ -4288,6 +4421,10 @@ int f2fs_build_segment_manager(struct f2fs_sb_info *sbi)
 	if (err)
 		return err;
 
+	err = sanity_check_curseg(sbi);
+	if (err)
+		return err;
+
 	init_min_max_mtime(sbi);
 	return 0;
 }
diff --git a/fs/f2fs/segment.h b/fs/f2fs/segment.h
index a77f76f528b6..b74602813a05 100644
--- a/fs/f2fs/segment.h
+++ b/fs/f2fs/segment.h
@@ -82,7 +82,7 @@
 	(GET_SEGOFF_FROM_SEG0(sbi, blk_addr) & ((sbi)->blocks_per_seg - 1))
 
 #define GET_SEGNO(sbi, blk_addr)					\
-	((!is_valid_data_blkaddr(sbi, blk_addr)) ?			\
+	((!__is_valid_data_blkaddr(blk_addr)) ?			\
 	NULL_SEGNO : GET_L2R_SEGNO(FREE_I(sbi),			\
 		GET_SEGNO_FROM_SEG0(sbi, blk_addr)))
 #define BLKS_PER_SEC(sbi)					\
@@ -109,7 +109,7 @@
 #define	START_SEGNO(segno)		\
 	(SIT_BLOCK_OFFSET(segno) * SIT_ENTRY_PER_BLOCK)
 #define SIT_BLK_CNT(sbi)			\
-	((MAIN_SEGS(sbi) + SIT_ENTRY_PER_BLOCK - 1) / SIT_ENTRY_PER_BLOCK)
+	DIV_ROUND_UP(MAIN_SEGS(sbi), SIT_ENTRY_PER_BLOCK)
 #define f2fs_bitmap_size(nr)			\
 	(BITS_TO_LONGS(nr) * sizeof(unsigned long))
 
@@ -656,14 +656,15 @@ static inline void check_seg_range(struct f2fs_sb_info *sbi, unsigned int segno)
 	f2fs_bug_on(sbi, segno > TOTAL_SEGS(sbi) - 1);
 }
 
-static inline void verify_block_addr(struct f2fs_io_info *fio, block_t blk_addr)
+static inline void verify_fio_blkaddr(struct f2fs_io_info *fio)
 {
 	struct f2fs_sb_info *sbi = fio->sbi;
 
-	if (__is_meta_io(fio))
-		verify_blkaddr(sbi, blk_addr, META_GENERIC);
-	else
-		verify_blkaddr(sbi, blk_addr, DATA_GENERIC);
+	if (__is_valid_data_blkaddr(fio->old_blkaddr))
+		verify_blkaddr(sbi, fio->old_blkaddr, __is_meta_io(fio) ?
+					META_GENERIC : DATA_GENERIC);
+	verify_blkaddr(sbi, fio->new_blkaddr, __is_meta_io(fio) ?
+					META_GENERIC : DATA_GENERIC_ENHANCE);
 }
 
 /*
@@ -672,7 +673,6 @@ static inline void verify_block_addr(struct f2fs_io_info *fio, block_t blk_addr)
 static inline int check_block_count(struct f2fs_sb_info *sbi,
 		int segno, struct f2fs_sit_entry *raw_sit)
 {
-#ifdef CONFIG_F2FS_CHECK_FS
 	bool is_valid  = test_bit_le(0, raw_sit->valid_map) ? true : false;
 	int valid_blocks = 0;
 	int cur_pos = 0, next_pos;
@@ -693,21 +693,19 @@ static inline int check_block_count(struct f2fs_sb_info *sbi,
 	} while (cur_pos < sbi->blocks_per_seg);
 
 	if (unlikely(GET_SIT_VBLOCKS(raw_sit) != valid_blocks)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-				"Mismatch valid blocks %d vs. %d",
-					GET_SIT_VBLOCKS(raw_sit), valid_blocks);
+		f2fs_err(sbi, "Mismatch valid blocks %d vs. %d",
+			 GET_SIT_VBLOCKS(raw_sit), valid_blocks);
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		return -EINVAL;
+		return -EFSCORRUPTED;
 	}
-#endif
+
 	/* check segment usage, and check boundary of a given segment number */
 	if (unlikely(GET_SIT_VBLOCKS(raw_sit) > sbi->blocks_per_seg
 					|| segno > TOTAL_SEGS(sbi) - 1)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-				"Wrong valid blocks %d or segno %u",
-					GET_SIT_VBLOCKS(raw_sit), segno);
+		f2fs_err(sbi, "Wrong valid blocks %d or segno %u",
+			 GET_SIT_VBLOCKS(raw_sit), segno);
 		set_sbi_flag(sbi, SBI_NEED_FSCK);
-		return -EINVAL;
+		return -EFSCORRUPTED;
 	}
 	return 0;
 }
@@ -865,7 +863,7 @@ static inline void wake_up_discard_thread(struct f2fs_sb_info *sbi, bool force)
 		}
 	}
 	mutex_unlock(&dcc->cmd_lock);
-	if (!wakeup)
+	if (!wakeup || !is_idle(sbi, DISCARD_TIME))
 		return;
 wake_up:
 	dcc->discard_wake = 1;
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c
index c46a1d4318d4..d95a681ef7c9 100644
--- a/fs/f2fs/super.c
+++ b/fs/f2fs/super.c
@@ -136,7 +136,10 @@ enum {
 	Opt_alloc,
 	Opt_fsync,
 	Opt_test_dummy_encryption,
-	Opt_checkpoint,
+	Opt_checkpoint_disable,
+	Opt_checkpoint_disable_cap,
+	Opt_checkpoint_disable_cap_perc,
+	Opt_checkpoint_enable,
 	Opt_err,
 };
 
@@ -195,45 +198,52 @@ static match_table_t f2fs_tokens = {
 	{Opt_alloc, "alloc_mode=%s"},
 	{Opt_fsync, "fsync_mode=%s"},
 	{Opt_test_dummy_encryption, "test_dummy_encryption"},
-	{Opt_checkpoint, "checkpoint=%s"},
+	{Opt_checkpoint_disable, "checkpoint=disable"},
+	{Opt_checkpoint_disable_cap, "checkpoint=disable:%u"},
+	{Opt_checkpoint_disable_cap_perc, "checkpoint=disable:%u%%"},
+	{Opt_checkpoint_enable, "checkpoint=enable"},
 	{Opt_err, NULL},
 };
 
-void f2fs_msg(struct super_block *sb, const char *level, const char *fmt, ...)
+void f2fs_printk(struct f2fs_sb_info *sbi, const char *fmt, ...)
 {
 	struct va_format vaf;
 	va_list args;
+	int level;
 
 	va_start(args, fmt);
-	vaf.fmt = fmt;
+
+	level = printk_get_level(fmt);
+	vaf.fmt = printk_skip_level(fmt);
 	vaf.va = &args;
-	printk("%sF2FS-fs (%s): %pV\n", level, sb->s_id, &vaf);
+	printk("%c%cF2FS-fs (%s): %pV\n",
+	       KERN_SOH_ASCII, level, sbi->sb->s_id, &vaf);
+
 	va_end(args);
 }
 
 static inline void limit_reserve_root(struct f2fs_sb_info *sbi)
 {
-	block_t limit = (sbi->user_block_count << 1) / 1000;
+	block_t limit = min((sbi->user_block_count << 1) / 1000,
+			sbi->user_block_count - sbi->reserved_blocks);
 
 	/* limit is 0.2% */
 	if (test_opt(sbi, RESERVE_ROOT) &&
 			F2FS_OPTION(sbi).root_reserved_blocks > limit) {
 		F2FS_OPTION(sbi).root_reserved_blocks = limit;
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"Reduce reserved blocks for root = %u",
-			F2FS_OPTION(sbi).root_reserved_blocks);
+		f2fs_info(sbi, "Reduce reserved blocks for root = %u",
+			  F2FS_OPTION(sbi).root_reserved_blocks);
 	}
 	if (!test_opt(sbi, RESERVE_ROOT) &&
 		(!uid_eq(F2FS_OPTION(sbi).s_resuid,
 				make_kuid(&init_user_ns, F2FS_DEF_RESUID)) ||
 		!gid_eq(F2FS_OPTION(sbi).s_resgid,
 				make_kgid(&init_user_ns, F2FS_DEF_RESGID))))
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
-				from_kuid_munged(&init_user_ns,
-					F2FS_OPTION(sbi).s_resuid),
-				from_kgid_munged(&init_user_ns,
-					F2FS_OPTION(sbi).s_resgid));
+		f2fs_info(sbi, "Ignore s_resuid=%u, s_resgid=%u w/o reserve_root",
+			  from_kuid_munged(&init_user_ns,
+					   F2FS_OPTION(sbi).s_resuid),
+			  from_kgid_munged(&init_user_ns,
+					   F2FS_OPTION(sbi).s_resgid));
 }
 
 static void init_once(void *foo)
@@ -254,35 +264,29 @@ static int f2fs_set_qf_name(struct super_block *sb, int qtype,
 	int ret = -EINVAL;
 
 	if (sb_any_quota_loaded(sb) && !F2FS_OPTION(sbi).s_qf_names[qtype]) {
-		f2fs_msg(sb, KERN_ERR,
-			"Cannot change journaled "
-			"quota options when quota turned on");
+		f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 		return -EINVAL;
 	}
 	if (f2fs_sb_has_quota_ino(sbi)) {
-		f2fs_msg(sb, KERN_INFO,
-			"QUOTA feature is enabled, so ignore qf_name");
+		f2fs_info(sbi, "QUOTA feature is enabled, so ignore qf_name");
 		return 0;
 	}
 
 	qname = match_strdup(args);
 	if (!qname) {
-		f2fs_msg(sb, KERN_ERR,
-			"Not enough memory for storing quotafile name");
-		return -EINVAL;
+		f2fs_err(sbi, "Not enough memory for storing quotafile name");
+		return -ENOMEM;
 	}
 	if (F2FS_OPTION(sbi).s_qf_names[qtype]) {
 		if (strcmp(F2FS_OPTION(sbi).s_qf_names[qtype], qname) == 0)
 			ret = 0;
 		else
-			f2fs_msg(sb, KERN_ERR,
-				 "%s quota file already specified",
+			f2fs_err(sbi, "%s quota file already specified",
 				 QTYPE2NAME(qtype));
 		goto errout;
 	}
 	if (strchr(qname, '/')) {
-		f2fs_msg(sb, KERN_ERR,
-			"quotafile must be on filesystem root");
+		f2fs_err(sbi, "quotafile must be on filesystem root");
 		goto errout;
 	}
 	F2FS_OPTION(sbi).s_qf_names[qtype] = qname;
@@ -298,8 +302,7 @@ static int f2fs_clear_qf_name(struct super_block *sb, int qtype)
 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 
 	if (sb_any_quota_loaded(sb) && F2FS_OPTION(sbi).s_qf_names[qtype]) {
-		f2fs_msg(sb, KERN_ERR, "Cannot change journaled quota options"
-			" when quota turned on");
+		f2fs_err(sbi, "Cannot change journaled quota options when quota turned on");
 		return -EINVAL;
 	}
 	kvfree(F2FS_OPTION(sbi).s_qf_names[qtype]);
@@ -315,8 +318,7 @@ static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 	 * to support legacy quotas in quota files.
 	 */
 	if (test_opt(sbi, PRJQUOTA) && !f2fs_sb_has_project_quota(sbi)) {
-		f2fs_msg(sbi->sb, KERN_ERR, "Project quota feature not enabled. "
-			 "Cannot enable project quota enforcement.");
+		f2fs_err(sbi, "Project quota feature not enabled. Cannot enable project quota enforcement.");
 		return -1;
 	}
 	if (F2FS_OPTION(sbi).s_qf_names[USRQUOTA] ||
@@ -336,21 +338,18 @@ static int f2fs_check_quota_options(struct f2fs_sb_info *sbi)
 
 		if (test_opt(sbi, GRPQUOTA) || test_opt(sbi, USRQUOTA) ||
 				test_opt(sbi, PRJQUOTA)) {
-			f2fs_msg(sbi->sb, KERN_ERR, "old and new quota "
-					"format mixing");
+			f2fs_err(sbi, "old and new quota format mixing");
 			return -1;
 		}
 
 		if (!F2FS_OPTION(sbi).s_jquota_fmt) {
-			f2fs_msg(sbi->sb, KERN_ERR, "journaled quota format "
-					"not specified");
+			f2fs_err(sbi, "journaled quota format not specified");
 			return -1;
 		}
 	}
 
 	if (f2fs_sb_has_quota_ino(sbi) && F2FS_OPTION(sbi).s_jquota_fmt) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"QUOTA feature is enabled, so ignore jquota_fmt");
+		f2fs_info(sbi, "QUOTA feature is enabled, so ignore jquota_fmt");
 		F2FS_OPTION(sbi).s_jquota_fmt = 0;
 	}
 	return 0;
@@ -418,8 +417,7 @@ static int parse_options(struct super_block *sb, char *options)
 			break;
 		case Opt_nodiscard:
 			if (f2fs_sb_has_blkzoned(sbi)) {
-				f2fs_msg(sb, KERN_WARNING,
-					"discard is required for zoned block devices");
+				f2fs_warn(sbi, "discard is required for zoned block devices");
 				return -EINVAL;
 			}
 			clear_opt(sbi, DISCARD);
@@ -451,20 +449,16 @@ static int parse_options(struct super_block *sb, char *options)
 			break;
 #else
 		case Opt_user_xattr:
-			f2fs_msg(sb, KERN_INFO,
-				"user_xattr options not supported");
+			f2fs_info(sbi, "user_xattr options not supported");
 			break;
 		case Opt_nouser_xattr:
-			f2fs_msg(sb, KERN_INFO,
-				"nouser_xattr options not supported");
+			f2fs_info(sbi, "nouser_xattr options not supported");
 			break;
 		case Opt_inline_xattr:
-			f2fs_msg(sb, KERN_INFO,
-				"inline_xattr options not supported");
+			f2fs_info(sbi, "inline_xattr options not supported");
 			break;
 		case Opt_noinline_xattr:
-			f2fs_msg(sb, KERN_INFO,
-				"noinline_xattr options not supported");
+			f2fs_info(sbi, "noinline_xattr options not supported");
 			break;
 #endif
 #ifdef CONFIG_F2FS_FS_POSIX_ACL
@@ -476,10 +470,10 @@ static int parse_options(struct super_block *sb, char *options)
 			break;
 #else
 		case Opt_acl:
-			f2fs_msg(sb, KERN_INFO, "acl options not supported");
+			f2fs_info(sbi, "acl options not supported");
 			break;
 		case Opt_noacl:
-			f2fs_msg(sb, KERN_INFO, "noacl options not supported");
+			f2fs_info(sbi, "noacl options not supported");
 			break;
 #endif
 		case Opt_active_logs:
@@ -529,9 +523,8 @@ static int parse_options(struct super_block *sb, char *options)
 			if (args->from && match_int(args, &arg))
 				return -EINVAL;
 			if (test_opt(sbi, RESERVE_ROOT)) {
-				f2fs_msg(sb, KERN_INFO,
-					"Preserve previous reserve_root=%u",
-					F2FS_OPTION(sbi).root_reserved_blocks);
+				f2fs_info(sbi, "Preserve previous reserve_root=%u",
+					  F2FS_OPTION(sbi).root_reserved_blocks);
 			} else {
 				F2FS_OPTION(sbi).root_reserved_blocks = arg;
 				set_opt(sbi, RESERVE_ROOT);
@@ -542,8 +535,7 @@ static int parse_options(struct super_block *sb, char *options)
 				return -EINVAL;
 			uid = make_kuid(current_user_ns(), arg);
 			if (!uid_valid(uid)) {
-				f2fs_msg(sb, KERN_ERR,
-					"Invalid uid value %d", arg);
+				f2fs_err(sbi, "Invalid uid value %d", arg);
 				return -EINVAL;
 			}
 			F2FS_OPTION(sbi).s_resuid = uid;
@@ -553,8 +545,7 @@ static int parse_options(struct super_block *sb, char *options)
 				return -EINVAL;
 			gid = make_kgid(current_user_ns(), arg);
 			if (!gid_valid(gid)) {
-				f2fs_msg(sb, KERN_ERR,
-					"Invalid gid value %d", arg);
+				f2fs_err(sbi, "Invalid gid value %d", arg);
 				return -EINVAL;
 			}
 			F2FS_OPTION(sbi).s_resgid = gid;
@@ -567,9 +558,7 @@ static int parse_options(struct super_block *sb, char *options)
 			if (strlen(name) == 8 &&
 					!strncmp(name, "adaptive", 8)) {
 				if (f2fs_sb_has_blkzoned(sbi)) {
-					f2fs_msg(sb, KERN_WARNING,
-						 "adaptive mode is not allowed with "
-						 "zoned block device feature");
+					f2fs_warn(sbi, "adaptive mode is not allowed with zoned block device feature");
 					kvfree(name);
 					return -EINVAL;
 				}
@@ -586,10 +575,9 @@ static int parse_options(struct super_block *sb, char *options)
 		case Opt_io_size_bits:
 			if (args->from && match_int(args, &arg))
 				return -EINVAL;
-			if (arg > __ilog2_u32(BIO_MAX_PAGES)) {
-				f2fs_msg(sb, KERN_WARNING,
-					"Not support %d, larger than %d",
-					1 << arg, BIO_MAX_PAGES);
+			if (arg <= 0 || arg > __ilog2_u32(BIO_MAX_PAGES)) {
+				f2fs_warn(sbi, "Not support %d, larger than %d",
+					  1 << arg, BIO_MAX_PAGES);
 				return -EINVAL;
 			}
 			F2FS_OPTION(sbi).write_io_size_bits = arg;
@@ -610,13 +598,11 @@ static int parse_options(struct super_block *sb, char *options)
 			break;
 #else
 		case Opt_fault_injection:
-			f2fs_msg(sb, KERN_INFO,
-				"fault_injection options not supported");
+			f2fs_info(sbi, "fault_injection options not supported");
 			break;
 
 		case Opt_fault_type:
-			f2fs_msg(sb, KERN_INFO,
-				"fault_type options not supported");
+			f2fs_info(sbi, "fault_type options not supported");
 			break;
 #endif
 		case Opt_lazytime:
@@ -696,8 +682,7 @@ static int parse_options(struct super_block *sb, char *options)
 		case Opt_jqfmt_vfsv0:
 		case Opt_jqfmt_vfsv1:
 		case Opt_noquota:
-			f2fs_msg(sb, KERN_INFO,
-					"quota operations not supported");
+			f2fs_info(sbi, "quota operations not supported");
 			break;
 #endif
 		case Opt_whint:
@@ -757,41 +742,46 @@ static int parse_options(struct super_block *sb, char *options)
 			kvfree(name);
 			break;
 		case Opt_test_dummy_encryption:
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 			if (!f2fs_sb_has_encrypt(sbi)) {
-				f2fs_msg(sb, KERN_ERR, "Encrypt feature is off");
+				f2fs_err(sbi, "Encrypt feature is off");
 				return -EINVAL;
 			}
 
 			F2FS_OPTION(sbi).test_dummy_encryption = true;
-			f2fs_msg(sb, KERN_INFO,
-					"Test dummy encryption mode enabled");
+			f2fs_info(sbi, "Test dummy encryption mode enabled");
 #else
-			f2fs_msg(sb, KERN_INFO,
-					"Test dummy encryption mount option ignored");
+			f2fs_info(sbi, "Test dummy encryption mount option ignored");
 #endif
 			break;
-		case Opt_checkpoint:
-			name = match_strdup(&args[0]);
-			if (!name)
-				return -ENOMEM;
-
-			if (strlen(name) == 6 &&
-					!strncmp(name, "enable", 6)) {
-				clear_opt(sbi, DISABLE_CHECKPOINT);
-			} else if (strlen(name) == 7 &&
-					!strncmp(name, "disable", 7)) {
-				set_opt(sbi, DISABLE_CHECKPOINT);
-			} else {
-				kvfree(name);
+		case Opt_checkpoint_disable_cap_perc:
+			if (args->from && match_int(args, &arg))
 				return -EINVAL;
-			}
-			kvfree(name);
+			if (arg < 0 || arg > 100)
+				return -EINVAL;
+			if (arg == 100)
+				F2FS_OPTION(sbi).unusable_cap =
+					sbi->user_block_count;
+			else
+				F2FS_OPTION(sbi).unusable_cap =
+					(sbi->user_block_count / 100) *	arg;
+			set_opt(sbi, DISABLE_CHECKPOINT);
+			break;
+		case Opt_checkpoint_disable_cap:
+			if (args->from && match_int(args, &arg))
+				return -EINVAL;
+			F2FS_OPTION(sbi).unusable_cap = arg;
+			set_opt(sbi, DISABLE_CHECKPOINT);
+			break;
+		case Opt_checkpoint_disable:
+			set_opt(sbi, DISABLE_CHECKPOINT);
+			break;
+		case Opt_checkpoint_enable:
+			clear_opt(sbi, DISABLE_CHECKPOINT);
 			break;
 		default:
-			f2fs_msg(sb, KERN_ERR,
-				"Unrecognized mount option \"%s\" or missing value",
-				p);
+			f2fs_err(sbi, "Unrecognized mount option \"%s\" or missing value",
+				 p);
 			return -EINVAL;
 		}
 	}
@@ -800,55 +790,47 @@ static int parse_options(struct super_block *sb, char *options)
 		return -EINVAL;
 #else
 	if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sbi->sb)) {
-		f2fs_msg(sbi->sb, KERN_INFO,
-			 "Filesystem with quota feature cannot be mounted RDWR "
-			 "without CONFIG_QUOTA");
+		f2fs_info(sbi, "Filesystem with quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 		return -EINVAL;
 	}
 	if (f2fs_sb_has_project_quota(sbi) && !f2fs_readonly(sbi->sb)) {
-		f2fs_msg(sb, KERN_ERR,
-			"Filesystem with project quota feature cannot be "
-			"mounted RDWR without CONFIG_QUOTA");
+		f2fs_err(sbi, "Filesystem with project quota feature cannot be mounted RDWR without CONFIG_QUOTA");
 		return -EINVAL;
 	}
 #endif
 
 	if (F2FS_IO_SIZE_BITS(sbi) && !test_opt(sbi, LFS)) {
-		f2fs_msg(sb, KERN_ERR,
-				"Should set mode=lfs with %uKB-sized IO",
-				F2FS_IO_SIZE_KB(sbi));
+		f2fs_err(sbi, "Should set mode=lfs with %uKB-sized IO",
+			 F2FS_IO_SIZE_KB(sbi));
 		return -EINVAL;
 	}
 
 	if (test_opt(sbi, INLINE_XATTR_SIZE)) {
+		int min_size, max_size;
+
 		if (!f2fs_sb_has_extra_attr(sbi) ||
 			!f2fs_sb_has_flexible_inline_xattr(sbi)) {
-			f2fs_msg(sb, KERN_ERR,
-					"extra_attr or flexible_inline_xattr "
-					"feature is off");
+			f2fs_err(sbi, "extra_attr or flexible_inline_xattr feature is off");
 			return -EINVAL;
 		}
 		if (!test_opt(sbi, INLINE_XATTR)) {
-			f2fs_msg(sb, KERN_ERR,
-					"inline_xattr_size option should be "
-					"set with inline_xattr option");
+			f2fs_err(sbi, "inline_xattr_size option should be set with inline_xattr option");
 			return -EINVAL;
 		}
-		if (!F2FS_OPTION(sbi).inline_xattr_size ||
-			F2FS_OPTION(sbi).inline_xattr_size >=
-					DEF_ADDRS_PER_INODE -
-					F2FS_TOTAL_EXTRA_ATTR_SIZE -
-					DEF_INLINE_RESERVED_SIZE -
-					DEF_MIN_INLINE_SIZE) {
-			f2fs_msg(sb, KERN_ERR,
-					"inline xattr size is out of range");
+
+		min_size = sizeof(struct f2fs_xattr_header) / sizeof(__le32);
+		max_size = MAX_INLINE_XATTR_SIZE;
+
+		if (F2FS_OPTION(sbi).inline_xattr_size < min_size ||
+				F2FS_OPTION(sbi).inline_xattr_size > max_size) {
+			f2fs_err(sbi, "inline xattr size is out of range: %d ~ %d",
+				 min_size, max_size);
 			return -EINVAL;
 		}
 	}
 
 	if (test_opt(sbi, DISABLE_CHECKPOINT) && test_opt(sbi, LFS)) {
-		f2fs_msg(sb, KERN_ERR,
-				"LFS not compatible with checkpoint=disable\n");
+		f2fs_err(sbi, "LFS not compatible with checkpoint=disable\n");
 		return -EINVAL;
 	}
 
@@ -915,6 +897,10 @@ static int f2fs_drop_inode(struct inode *inode)
 			sb_start_intwrite(inode->i_sb);
 			f2fs_i_size_write(inode, 0);
 
+			f2fs_submit_merged_write_cond(F2FS_I_SB(inode),
+					inode, NULL, 0, DATA);
+			truncate_inode_pages_final(inode->i_mapping);
+
 			if (F2FS_HAS_BLOCKS(inode))
 				f2fs_truncate(inode);
 
@@ -993,17 +979,12 @@ static void f2fs_dirty_inode(struct inode *inode, int flags)
 	f2fs_inode_dirtied(inode, false);
 }
 
-static void f2fs_i_callback(struct rcu_head *head)
+static void f2fs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
+	fscrypt_free_inode(inode);
 	kmem_cache_free(f2fs_inode_cachep, F2FS_I(inode));
 }
 
-static void f2fs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, f2fs_i_callback);
-}
-
 static void destroy_percpu_info(struct f2fs_sb_info *sbi)
 {
 	percpu_counter_destroy(&sbi->alloc_valid_block_count);
@@ -1017,7 +998,7 @@ static void destroy_device_list(struct f2fs_sb_info *sbi)
 	for (i = 0; i < sbi->s_ndevs; i++) {
 		blkdev_put(FDEV(i).bdev, FMODE_EXCL);
 #ifdef CONFIG_BLK_DEV_ZONED
-		kvfree(FDEV(i).blkz_type);
+		kvfree(FDEV(i).blkz_seq);
 #endif
 	}
 	kvfree(sbi->devs);
@@ -1048,7 +1029,7 @@ static void f2fs_put_super(struct super_block *sb)
 	}
 
 	/* be sure to wait for any on-going discard commands */
-	dropped = f2fs_wait_discard_bios(sbi);
+	dropped = f2fs_issue_discard_timeout(sbi);
 
 	if ((f2fs_hw_support_discard(sbi) || f2fs_hw_should_discard(sbi)) &&
 					!sbi->discard_blks && !dropped) {
@@ -1075,7 +1056,10 @@ static void f2fs_put_super(struct super_block *sb)
 	f2fs_bug_on(sbi, sbi->fsync_node_num);
 
 	iput(sbi->node_inode);
+	sbi->node_inode = NULL;
+
 	iput(sbi->meta_inode);
+	sbi->meta_inode = NULL;
 
 	/*
 	 * iput() can update stat information, if f2fs_write_checkpoint()
@@ -1216,10 +1200,13 @@ static int f2fs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_blocks = total_count - start_count;
 	buf->f_bfree = user_block_count - valid_user_blocks(sbi) -
 						sbi->current_reserved_blocks;
+
+	spin_lock(&sbi->stat_lock);
 	if (unlikely(buf->f_bfree <= sbi->unusable_block_count))
 		buf->f_bfree = 0;
 	else
 		buf->f_bfree -= sbi->unusable_block_count;
+	spin_unlock(&sbi->stat_lock);
 
 	if (buf->f_bfree > F2FS_OPTION(sbi).root_reserved_blocks)
 		buf->f_bavail = buf->f_bfree -
@@ -1305,6 +1292,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 		seq_puts(seq, ",disable_roll_forward");
 	if (test_opt(sbi, DISCARD))
 		seq_puts(seq, ",discard");
+	else
+		seq_puts(seq, ",nodiscard");
 	if (test_opt(sbi, NOHEAP))
 		seq_puts(seq, ",no_heap");
 	else
@@ -1390,7 +1379,7 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 		seq_printf(seq, ",whint_mode=%s", "user-based");
 	else if (F2FS_OPTION(sbi).whint_mode == WHINT_MODE_FS)
 		seq_printf(seq, ",whint_mode=%s", "fs-based");
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	if (F2FS_OPTION(sbi).test_dummy_encryption)
 		seq_puts(seq, ",test_dummy_encryption");
 #endif
@@ -1401,8 +1390,8 @@ static int f2fs_show_options(struct seq_file *seq, struct dentry *root)
 		seq_printf(seq, ",alloc_mode=%s", "reuse");
 
 	if (test_opt(sbi, DISABLE_CHECKPOINT))
-		seq_puts(seq, ",checkpoint=disable");
-
+		seq_printf(seq, ",checkpoint=disable:%u",
+				F2FS_OPTION(sbi).unusable_cap);
 	if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_POSIX)
 		seq_printf(seq, ",fsync_mode=%s", "posix");
 	else if (F2FS_OPTION(sbi).fsync_mode == FSYNC_MODE_STRICT)
@@ -1431,6 +1420,7 @@ static void default_options(struct f2fs_sb_info *sbi)
 	set_opt(sbi, EXTENT_CACHE);
 	set_opt(sbi, NOHEAP);
 	clear_opt(sbi, DISABLE_CHECKPOINT);
+	F2FS_OPTION(sbi).unusable_cap = 0;
 	sbi->sb->s_flags |= SB_LAZYTIME;
 	set_opt(sbi, FLUSH_MERGE);
 	set_opt(sbi, DISCARD);
@@ -1455,9 +1445,16 @@ static int f2fs_enable_quotas(struct super_block *sb);
 
 static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
 {
+	unsigned int s_flags = sbi->sb->s_flags;
 	struct cp_control cpc;
-	int err;
+	int err = 0;
+	int ret;
+	block_t unusable;
 
+	if (s_flags & SB_RDONLY) {
+		f2fs_err(sbi, "checkpoint=disable on readonly fs");
+		return -EINVAL;
+	}
 	sbi->sb->s_flags |= SB_ACTIVE;
 
 	f2fs_update_time(sbi, DISABLE_TIME);
@@ -1465,27 +1462,42 @@ static int f2fs_disable_checkpoint(struct f2fs_sb_info *sbi)
 	while (!f2fs_time_over(sbi, DISABLE_TIME)) {
 		mutex_lock(&sbi->gc_mutex);
 		err = f2fs_gc(sbi, true, false, NULL_SEGNO);
-		if (err == -ENODATA)
+		if (err == -ENODATA) {
+			err = 0;
 			break;
+		}
 		if (err && err != -EAGAIN)
-			return err;
+			break;
 	}
 
-	err = sync_filesystem(sbi->sb);
-	if (err)
-		return err;
+	ret = sync_filesystem(sbi->sb);
+	if (ret || err) {
+		err = ret ? ret: err;
+		goto restore_flag;
+	}
 
-	if (f2fs_disable_cp_again(sbi))
-		return -EAGAIN;
+	unusable = f2fs_get_unusable_blocks(sbi);
+	if (f2fs_disable_cp_again(sbi, unusable)) {
+		err = -EAGAIN;
+		goto restore_flag;
+	}
 
 	mutex_lock(&sbi->gc_mutex);
 	cpc.reason = CP_PAUSE;
 	set_sbi_flag(sbi, SBI_CP_DISABLED);
-	f2fs_write_checkpoint(sbi, &cpc);
+	err = f2fs_write_checkpoint(sbi, &cpc);
+	if (err)
+		goto out_unlock;
+
+	spin_lock(&sbi->stat_lock);
+	sbi->unusable_block_count = unusable;
+	spin_unlock(&sbi->stat_lock);
 
-	sbi->unusable_block_count = 0;
+out_unlock:
 	mutex_unlock(&sbi->gc_mutex);
-	return 0;
+restore_flag:
+	sbi->sb->s_flags = s_flags;	/* Restore MS_RDONLY status */
+	return err;
 }
 
 static void f2fs_enable_checkpoint(struct f2fs_sb_info *sbi)
@@ -1543,8 +1555,8 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
 	/* recover superblocks we couldn't write due to previous RO mount */
 	if (!(*flags & SB_RDONLY) && is_sbi_flag_set(sbi, SBI_NEED_SB_WRITE)) {
 		err = f2fs_commit_super(sbi, false);
-		f2fs_msg(sb, KERN_INFO,
-			"Try to recover all the superblocks, ret: %d", err);
+		f2fs_info(sbi, "Try to recover all the superblocks, ret: %d",
+			  err);
 		if (!err)
 			clear_sbi_flag(sbi, SBI_NEED_SB_WRITE);
 	}
@@ -1585,15 +1597,13 @@ static int f2fs_remount(struct super_block *sb, int *flags, char *data)
 	/* disallow enable/disable extent_cache dynamically */
 	if (no_extent_cache == !!test_opt(sbi, EXTENT_CACHE)) {
 		err = -EINVAL;
-		f2fs_msg(sbi->sb, KERN_WARNING,
-				"switch extent_cache option is not allowed");
+		f2fs_warn(sbi, "switch extent_cache option is not allowed");
 		goto restore_opts;
 	}
 
 	if ((*flags & SB_RDONLY) && test_opt(sbi, DISABLE_CHECKPOINT)) {
 		err = -EINVAL;
-		f2fs_msg(sbi->sb, KERN_WARNING,
-			"disabling checkpoint not compatible with read-only");
+		f2fs_warn(sbi, "disabling checkpoint not compatible with read-only");
 		goto restore_opts;
 	}
 
@@ -1663,8 +1673,7 @@ skip:
 restore_gc:
 	if (need_restart_gc) {
 		if (f2fs_start_gc_thread(sbi))
-			f2fs_msg(sbi->sb, KERN_WARNING,
-				"background gc thread has stopped");
+			f2fs_warn(sbi, "background gc thread has stopped");
 	} else if (need_stop_gc) {
 		f2fs_stop_gc_thread(sbi);
 	}
@@ -1803,8 +1812,7 @@ static qsize_t *f2fs_get_reserved_space(struct inode *inode)
 static int f2fs_quota_on_mount(struct f2fs_sb_info *sbi, int type)
 {
 	if (is_set_ckpt_flags(sbi, CP_QUOTA_NEED_FSCK_FLAG)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"quota sysfile may be corrupted, skip loading it");
+		f2fs_err(sbi, "quota sysfile may be corrupted, skip loading it");
 		return 0;
 	}
 
@@ -1820,8 +1828,7 @@ int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
 	if (f2fs_sb_has_quota_ino(sbi) && rdonly) {
 		err = f2fs_enable_quotas(sbi->sb);
 		if (err) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-					"Cannot turn on quota_ino: %d", err);
+			f2fs_err(sbi, "Cannot turn on quota_ino: %d", err);
 			return 0;
 		}
 		return 1;
@@ -1834,8 +1841,8 @@ int f2fs_enable_quota_files(struct f2fs_sb_info *sbi, bool rdonly)
 				enabled = 1;
 				continue;
 			}
-			f2fs_msg(sbi->sb, KERN_ERR,
-				"Cannot turn on quotas: %d on %d", err, i);
+			f2fs_err(sbi, "Cannot turn on quotas: %d on %d",
+				 err, i);
 		}
 	}
 	return enabled;
@@ -1856,8 +1863,7 @@ static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
 
 	qf_inode = f2fs_iget(sb, qf_inum);
 	if (IS_ERR(qf_inode)) {
-		f2fs_msg(sb, KERN_ERR,
-			"Bad quota inode %u:%lu", type, qf_inum);
+		f2fs_err(F2FS_SB(sb), "Bad quota inode %u:%lu", type, qf_inum);
 		return PTR_ERR(qf_inode);
 	}
 
@@ -1870,17 +1876,17 @@ static int f2fs_quota_enable(struct super_block *sb, int type, int format_id,
 
 static int f2fs_enable_quotas(struct super_block *sb)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 	int type, err = 0;
 	unsigned long qf_inum;
 	bool quota_mopt[MAXQUOTAS] = {
-		test_opt(F2FS_SB(sb), USRQUOTA),
-		test_opt(F2FS_SB(sb), GRPQUOTA),
-		test_opt(F2FS_SB(sb), PRJQUOTA),
+		test_opt(sbi, USRQUOTA),
+		test_opt(sbi, GRPQUOTA),
+		test_opt(sbi, PRJQUOTA),
 	};
 
 	if (is_set_ckpt_flags(F2FS_SB(sb), CP_QUOTA_NEED_FSCK_FLAG)) {
-		f2fs_msg(sb, KERN_ERR,
-			"quota file may be corrupted, skip loading it");
+		f2fs_err(sbi, "quota file may be corrupted, skip loading it");
 		return 0;
 	}
 
@@ -1893,10 +1899,8 @@ static int f2fs_enable_quotas(struct super_block *sb)
 				DQUOT_USAGE_ENABLED |
 				(quota_mopt[type] ? DQUOT_LIMITS_ENABLED : 0));
 			if (err) {
-				f2fs_msg(sb, KERN_ERR,
-					"Failed to enable quota tracking "
-					"(type=%d, err=%d). Please run "
-					"fsck to fix.", type, err);
+				f2fs_err(sbi, "Failed to enable quota tracking (type=%d, err=%d). Please run fsck to fix.",
+					 type, err);
 				for (type--; type >= 0; type--)
 					dquot_quota_off(sb, type);
 				set_sbi_flag(F2FS_SB(sb),
@@ -1915,6 +1919,18 @@ int f2fs_quota_sync(struct super_block *sb, int type)
 	int cnt;
 	int ret;
 
+	/*
+	 * do_quotactl
+	 *  f2fs_quota_sync
+	 *  down_read(quota_sem)
+	 *  dquot_writeback_dquots()
+	 *  f2fs_dquot_commit
+	 *                            block_operation
+	 *                            down_read(quota_sem)
+	 */
+	f2fs_lock_op(sbi);
+
+	down_read(&sbi->quota_sem);
 	ret = dquot_writeback_dquots(sb, type);
 	if (ret)
 		goto out;
@@ -1952,6 +1968,8 @@ int f2fs_quota_sync(struct super_block *sb, int type)
 out:
 	if (ret)
 		set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
+	f2fs_unlock_op(sbi);
 	return ret;
 }
 
@@ -2016,13 +2034,17 @@ void f2fs_quota_off_umount(struct super_block *sb)
 		if (err) {
 			int ret = dquot_quota_off(sb, type);
 
-			f2fs_msg(sb, KERN_ERR,
-				"Fail to turn off disk quota "
-				"(type: %d, err: %d, ret:%d), Please "
-				"run fsck to fix it.", type, err, ret);
+			f2fs_err(F2FS_SB(sb), "Fail to turn off disk quota (type: %d, err: %d, ret:%d), Please run fsck to fix it.",
+				 type, err, ret);
 			set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
 		}
 	}
+	/*
+	 * In case of checkpoint=disable, we must flush quota blocks.
+	 * This can cause NULL exception for node_inode in end_io, since
+	 * put_super already dropped it.
+	 */
+	sync_filesystem(sb);
 }
 
 static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
@@ -2039,32 +2061,40 @@ static void f2fs_truncate_quota_inode_pages(struct super_block *sb)
 
 static int f2fs_dquot_commit(struct dquot *dquot)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_commit(dquot);
 	if (ret < 0)
-		set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
+		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
 static int f2fs_dquot_acquire(struct dquot *dquot)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_acquire(dquot);
 	if (ret < 0)
-		set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
-
+		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
 static int f2fs_dquot_release(struct dquot *dquot)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(dquot->dq_sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_release(dquot);
 	if (ret < 0)
-		set_sbi_flag(F2FS_SB(dquot->dq_sb), SBI_QUOTA_NEED_REPAIR);
+		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
@@ -2074,22 +2104,27 @@ static int f2fs_dquot_mark_dquot_dirty(struct dquot *dquot)
 	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_mark_dquot_dirty(dquot);
 
 	/* if we are using journalled quota */
 	if (is_journalled_quota(sbi))
 		set_sbi_flag(sbi, SBI_QUOTA_NEED_FLUSH);
 
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
 static int f2fs_dquot_commit_info(struct super_block *sb, int type)
 {
+	struct f2fs_sb_info *sbi = F2FS_SB(sb);
 	int ret;
 
+	down_read(&sbi->quota_sem);
 	ret = dquot_commit_info(sb, type);
 	if (ret < 0)
-		set_sbi_flag(F2FS_SB(sb), SBI_QUOTA_NEED_REPAIR);
+		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	up_read(&sbi->quota_sem);
 	return ret;
 }
 
@@ -2135,8 +2170,8 @@ void f2fs_quota_off_umount(struct super_block *sb)
 
 static const struct super_operations f2fs_sops = {
 	.alloc_inode	= f2fs_alloc_inode,
+	.free_inode	= f2fs_free_inode,
 	.drop_inode	= f2fs_drop_inode,
-	.destroy_inode	= f2fs_destroy_inode,
 	.write_inode	= f2fs_write_inode,
 	.dirty_inode	= f2fs_dirty_inode,
 	.show_options	= f2fs_show_options,
@@ -2154,7 +2189,7 @@ static const struct super_operations f2fs_sops = {
 	.remount_fs	= f2fs_remount,
 };
 
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 static int f2fs_get_context(struct inode *inode, void *ctx, size_t len)
 {
 	return f2fs_getxattr(inode, F2FS_XATTR_INDEX_ENCRYPTION,
@@ -2245,7 +2280,7 @@ static const struct export_operations f2fs_export_ops = {
 static loff_t max_file_blocks(void)
 {
 	loff_t result = 0;
-	loff_t leaf_count = ADDRS_PER_BLOCK;
+	loff_t leaf_count = DEF_ADDRS_PER_BLOCK;
 
 	/*
 	 * note: previously, result is equal to (DEF_ADDRS_PER_INODE -
@@ -2306,55 +2341,49 @@ static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
 				(segment_count << log_blocks_per_seg);
 
 	if (segment0_blkaddr != cp_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Mismatch start address, segment0(%u) cp_blkaddr(%u)",
-			segment0_blkaddr, cp_blkaddr);
+		f2fs_info(sbi, "Mismatch start address, segment0(%u) cp_blkaddr(%u)",
+			  segment0_blkaddr, cp_blkaddr);
 		return true;
 	}
 
 	if (cp_blkaddr + (segment_count_ckpt << log_blocks_per_seg) !=
 							sit_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong CP boundary, start(%u) end(%u) blocks(%u)",
-			cp_blkaddr, sit_blkaddr,
-			segment_count_ckpt << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong CP boundary, start(%u) end(%u) blocks(%u)",
+			  cp_blkaddr, sit_blkaddr,
+			  segment_count_ckpt << log_blocks_per_seg);
 		return true;
 	}
 
 	if (sit_blkaddr + (segment_count_sit << log_blocks_per_seg) !=
 							nat_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
-			sit_blkaddr, nat_blkaddr,
-			segment_count_sit << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong SIT boundary, start(%u) end(%u) blocks(%u)",
+			  sit_blkaddr, nat_blkaddr,
+			  segment_count_sit << log_blocks_per_seg);
 		return true;
 	}
 
 	if (nat_blkaddr + (segment_count_nat << log_blocks_per_seg) !=
 							ssa_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
-			nat_blkaddr, ssa_blkaddr,
-			segment_count_nat << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong NAT boundary, start(%u) end(%u) blocks(%u)",
+			  nat_blkaddr, ssa_blkaddr,
+			  segment_count_nat << log_blocks_per_seg);
 		return true;
 	}
 
 	if (ssa_blkaddr + (segment_count_ssa << log_blocks_per_seg) !=
 							main_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
-			ssa_blkaddr, main_blkaddr,
-			segment_count_ssa << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong SSA boundary, start(%u) end(%u) blocks(%u)",
+			  ssa_blkaddr, main_blkaddr,
+			  segment_count_ssa << log_blocks_per_seg);
 		return true;
 	}
 
 	if (main_end_blkaddr > seg_end_blkaddr) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
-			main_blkaddr,
-			segment0_blkaddr +
-				(segment_count << log_blocks_per_seg),
-			segment_count_main << log_blocks_per_seg);
+		f2fs_info(sbi, "Wrong MAIN_AREA boundary, start(%u) end(%u) block(%u)",
+			  main_blkaddr,
+			  segment0_blkaddr +
+			  (segment_count << log_blocks_per_seg),
+			  segment_count_main << log_blocks_per_seg);
 		return true;
 	} else if (main_end_blkaddr < seg_end_blkaddr) {
 		int err = 0;
@@ -2371,12 +2400,11 @@ static inline bool sanity_check_area_boundary(struct f2fs_sb_info *sbi,
 			err = __f2fs_commit_super(bh, NULL);
 			res = err ? "failed" : "done";
 		}
-		f2fs_msg(sb, KERN_INFO,
-			"Fix alignment : %s, start(%u) end(%u) block(%u)",
-			res, main_blkaddr,
-			segment0_blkaddr +
-				(segment_count << log_blocks_per_seg),
-			segment_count_main << log_blocks_per_seg);
+		f2fs_info(sbi, "Fix alignment : %s, start(%u) end(%u) block(%u)",
+			  res, main_blkaddr,
+			  segment0_blkaddr +
+			  (segment_count << log_blocks_per_seg),
+			  segment_count_main << log_blocks_per_seg);
 		if (err)
 			return true;
 	}
@@ -2390,7 +2418,6 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
 	block_t total_sections, blocks_per_seg;
 	struct f2fs_super_block *raw_super = (struct f2fs_super_block *)
 					(bh->b_data + F2FS_SUPER_OFFSET);
-	struct super_block *sb = sbi->sb;
 	unsigned int blocksize;
 	size_t crc_offset = 0;
 	__u32 crc = 0;
@@ -2400,48 +2427,42 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
 		crc_offset = le32_to_cpu(raw_super->checksum_offset);
 		if (crc_offset !=
 			offsetof(struct f2fs_super_block, crc)) {
-			f2fs_msg(sb, KERN_INFO,
-				"Invalid SB checksum offset: %zu",
-				crc_offset);
+			f2fs_info(sbi, "Invalid SB checksum offset: %zu",
+				  crc_offset);
 			return 1;
 		}
 		crc = le32_to_cpu(raw_super->crc);
 		if (!f2fs_crc_valid(sbi, crc, raw_super, crc_offset)) {
-			f2fs_msg(sb, KERN_INFO,
-				"Invalid SB checksum value: %u", crc);
+			f2fs_info(sbi, "Invalid SB checksum value: %u", crc);
 			return 1;
 		}
 	}
 
 	if (F2FS_SUPER_MAGIC != le32_to_cpu(raw_super->magic)) {
-		f2fs_msg(sb, KERN_INFO,
-			"Magic Mismatch, valid(0x%x) - read(0x%x)",
-			F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
+		f2fs_info(sbi, "Magic Mismatch, valid(0x%x) - read(0x%x)",
+			  F2FS_SUPER_MAGIC, le32_to_cpu(raw_super->magic));
 		return 1;
 	}
 
 	/* Currently, support only 4KB page cache size */
 	if (F2FS_BLKSIZE != PAGE_SIZE) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid page_cache_size (%lu), supports only 4KB\n",
-			PAGE_SIZE);
+		f2fs_info(sbi, "Invalid page_cache_size (%lu), supports only 4KB",
+			  PAGE_SIZE);
 		return 1;
 	}
 
 	/* Currently, support only 4KB block size */
 	blocksize = 1 << le32_to_cpu(raw_super->log_blocksize);
 	if (blocksize != F2FS_BLKSIZE) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid blocksize (%u), supports only 4KB\n",
-			blocksize);
+		f2fs_info(sbi, "Invalid blocksize (%u), supports only 4KB",
+			  blocksize);
 		return 1;
 	}
 
 	/* check log blocks per segment */
 	if (le32_to_cpu(raw_super->log_blocks_per_seg) != 9) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid log blocks per segment (%u)\n",
-			le32_to_cpu(raw_super->log_blocks_per_seg));
+		f2fs_info(sbi, "Invalid log blocks per segment (%u)",
+			  le32_to_cpu(raw_super->log_blocks_per_seg));
 		return 1;
 	}
 
@@ -2450,17 +2471,16 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
 				F2FS_MAX_LOG_SECTOR_SIZE ||
 		le32_to_cpu(raw_super->log_sectorsize) <
 				F2FS_MIN_LOG_SECTOR_SIZE) {
-		f2fs_msg(sb, KERN_INFO, "Invalid log sectorsize (%u)",
-			le32_to_cpu(raw_super->log_sectorsize));
+		f2fs_info(sbi, "Invalid log sectorsize (%u)",
+			  le32_to_cpu(raw_super->log_sectorsize));
 		return 1;
 	}
 	if (le32_to_cpu(raw_super->log_sectors_per_block) +
 		le32_to_cpu(raw_super->log_sectorsize) !=
 			F2FS_MAX_LOG_SECTOR_SIZE) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid log sectors per block(%u) log sectorsize(%u)",
-			le32_to_cpu(raw_super->log_sectors_per_block),
-			le32_to_cpu(raw_super->log_sectorsize));
+		f2fs_info(sbi, "Invalid log sectors per block(%u) log sectorsize(%u)",
+			  le32_to_cpu(raw_super->log_sectors_per_block),
+			  le32_to_cpu(raw_super->log_sectorsize));
 		return 1;
 	}
 
@@ -2474,59 +2494,51 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
 
 	if (segment_count > F2FS_MAX_SEGMENT ||
 				segment_count < F2FS_MIN_SEGMENTS) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid segment count (%u)",
-			segment_count);
+		f2fs_info(sbi, "Invalid segment count (%u)", segment_count);
 		return 1;
 	}
 
 	if (total_sections > segment_count ||
 			total_sections < F2FS_MIN_SEGMENTS ||
 			segs_per_sec > segment_count || !segs_per_sec) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid segment/section count (%u, %u x %u)",
-			segment_count, total_sections, segs_per_sec);
+		f2fs_info(sbi, "Invalid segment/section count (%u, %u x %u)",
+			  segment_count, total_sections, segs_per_sec);
 		return 1;
 	}
 
 	if ((segment_count / segs_per_sec) < total_sections) {
-		f2fs_msg(sb, KERN_INFO,
-			"Small segment_count (%u < %u * %u)",
-			segment_count, segs_per_sec, total_sections);
+		f2fs_info(sbi, "Small segment_count (%u < %u * %u)",
+			  segment_count, segs_per_sec, total_sections);
 		return 1;
 	}
 
 	if (segment_count > (le64_to_cpu(raw_super->block_count) >> 9)) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong segment_count / block_count (%u > %llu)",
-			segment_count, le64_to_cpu(raw_super->block_count));
+		f2fs_info(sbi, "Wrong segment_count / block_count (%u > %llu)",
+			  segment_count, le64_to_cpu(raw_super->block_count));
 		return 1;
 	}
 
 	if (secs_per_zone > total_sections || !secs_per_zone) {
-		f2fs_msg(sb, KERN_INFO,
-			"Wrong secs_per_zone / total_sections (%u, %u)",
-			secs_per_zone, total_sections);
+		f2fs_info(sbi, "Wrong secs_per_zone / total_sections (%u, %u)",
+			  secs_per_zone, total_sections);
 		return 1;
 	}
 	if (le32_to_cpu(raw_super->extension_count) > F2FS_MAX_EXTENSION ||
 			raw_super->hot_ext_count > F2FS_MAX_EXTENSION ||
 			(le32_to_cpu(raw_super->extension_count) +
 			raw_super->hot_ext_count) > F2FS_MAX_EXTENSION) {
-		f2fs_msg(sb, KERN_INFO,
-			"Corrupted extension count (%u + %u > %u)",
-			le32_to_cpu(raw_super->extension_count),
-			raw_super->hot_ext_count,
-			F2FS_MAX_EXTENSION);
+		f2fs_info(sbi, "Corrupted extension count (%u + %u > %u)",
+			  le32_to_cpu(raw_super->extension_count),
+			  raw_super->hot_ext_count,
+			  F2FS_MAX_EXTENSION);
 		return 1;
 	}
 
 	if (le32_to_cpu(raw_super->cp_payload) >
 				(blocks_per_seg - F2FS_CP_PACKS)) {
-		f2fs_msg(sb, KERN_INFO,
-			"Insane cp_payload (%u > %u)",
-			le32_to_cpu(raw_super->cp_payload),
-			blocks_per_seg - F2FS_CP_PACKS);
+		f2fs_info(sbi, "Insane cp_payload (%u > %u)",
+			  le32_to_cpu(raw_super->cp_payload),
+			  blocks_per_seg - F2FS_CP_PACKS);
 		return 1;
 	}
 
@@ -2534,11 +2546,10 @@ static int sanity_check_raw_super(struct f2fs_sb_info *sbi,
 	if (le32_to_cpu(raw_super->node_ino) != 1 ||
 		le32_to_cpu(raw_super->meta_ino) != 2 ||
 		le32_to_cpu(raw_super->root_ino) != 3) {
-		f2fs_msg(sb, KERN_INFO,
-			"Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
-			le32_to_cpu(raw_super->node_ino),
-			le32_to_cpu(raw_super->meta_ino),
-			le32_to_cpu(raw_super->root_ino));
+		f2fs_info(sbi, "Invalid Fs Meta Ino: node(%u) meta(%u) root(%u)",
+			  le32_to_cpu(raw_super->node_ino),
+			  le32_to_cpu(raw_super->meta_ino),
+			  le32_to_cpu(raw_super->root_ino));
 		return 1;
 	}
 
@@ -2561,7 +2572,8 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
 	unsigned int log_blocks_per_seg;
 	unsigned int segment_count_main;
 	unsigned int cp_pack_start_sum, cp_payload;
-	block_t user_block_count;
+	block_t user_block_count, valid_user_blocks;
+	block_t avail_node_count, valid_node_count;
 	int i, j;
 
 	total = le32_to_cpu(raw_super->segment_count);
@@ -2581,8 +2593,7 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
 
 	if (unlikely(fsmeta < F2FS_MIN_SEGMENTS ||
 			ovp_segments == 0 || reserved_segments == 0)) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong layout: check mkfs.f2fs version");
+		f2fs_err(sbi, "Wrong layout: check mkfs.f2fs version");
 		return 1;
 	}
 
@@ -2591,8 +2602,24 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
 	log_blocks_per_seg = le32_to_cpu(raw_super->log_blocks_per_seg);
 	if (!user_block_count || user_block_count >=
 			segment_count_main << log_blocks_per_seg) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong user_block_count: %u", user_block_count);
+		f2fs_err(sbi, "Wrong user_block_count: %u",
+			 user_block_count);
+		return 1;
+	}
+
+	valid_user_blocks = le64_to_cpu(ckpt->valid_block_count);
+	if (valid_user_blocks > user_block_count) {
+		f2fs_err(sbi, "Wrong valid_user_blocks: %u, user_block_count: %u",
+			 valid_user_blocks, user_block_count);
+		return 1;
+	}
+
+	valid_node_count = le32_to_cpu(ckpt->valid_node_count);
+	avail_node_count = sbi->total_node_count - sbi->nquota_files -
+						F2FS_RESERVED_NODE_NUM;
+	if (valid_node_count > avail_node_count) {
+		f2fs_err(sbi, "Wrong valid_node_count: %u, avail_node_count: %u",
+			 valid_node_count, avail_node_count);
 		return 1;
 	}
 
@@ -2606,10 +2633,9 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
 		for (j = i + 1; j < NR_CURSEG_NODE_TYPE; j++) {
 			if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
 				le32_to_cpu(ckpt->cur_node_segno[j])) {
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"Node segment (%u, %u) has the same "
-					"segno: %u", i, j,
-					le32_to_cpu(ckpt->cur_node_segno[i]));
+				f2fs_err(sbi, "Node segment (%u, %u) has the same segno: %u",
+					 i, j,
+					 le32_to_cpu(ckpt->cur_node_segno[i]));
 				return 1;
 			}
 		}
@@ -2621,10 +2647,9 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
 		for (j = i + 1; j < NR_CURSEG_DATA_TYPE; j++) {
 			if (le32_to_cpu(ckpt->cur_data_segno[i]) ==
 				le32_to_cpu(ckpt->cur_data_segno[j])) {
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"Data segment (%u, %u) has the same "
-					"segno: %u", i, j,
-					le32_to_cpu(ckpt->cur_data_segno[i]));
+				f2fs_err(sbi, "Data segment (%u, %u) has the same segno: %u",
+					 i, j,
+					 le32_to_cpu(ckpt->cur_data_segno[i]));
 				return 1;
 			}
 		}
@@ -2633,10 +2658,9 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
 		for (j = i; j < NR_CURSEG_DATA_TYPE; j++) {
 			if (le32_to_cpu(ckpt->cur_node_segno[i]) ==
 				le32_to_cpu(ckpt->cur_data_segno[j])) {
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"Data segment (%u) and Data segment (%u)"
-					" has the same segno: %u", i, j,
-					le32_to_cpu(ckpt->cur_node_segno[i]));
+				f2fs_err(sbi, "Data segment (%u) and Data segment (%u) has the same segno: %u",
+					 i, j,
+					 le32_to_cpu(ckpt->cur_node_segno[i]));
 				return 1;
 			}
 		}
@@ -2647,9 +2671,8 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
 
 	if (sit_bitmap_size != ((sit_segs / 2) << log_blocks_per_seg) / 8 ||
 		nat_bitmap_size != ((nat_segs / 2) << log_blocks_per_seg) / 8) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong bitmap size: sit: %u, nat:%u",
-			sit_bitmap_size, nat_bitmap_size);
+		f2fs_err(sbi, "Wrong bitmap size: sit: %u, nat:%u",
+			 sit_bitmap_size, nat_bitmap_size);
 		return 1;
 	}
 
@@ -2658,14 +2681,22 @@ int f2fs_sanity_check_ckpt(struct f2fs_sb_info *sbi)
 	if (cp_pack_start_sum < cp_payload + 1 ||
 		cp_pack_start_sum > blocks_per_seg - 1 -
 			NR_CURSEG_TYPE) {
-		f2fs_msg(sbi->sb, KERN_ERR,
-			"Wrong cp_pack_start_sum: %u",
-			cp_pack_start_sum);
+		f2fs_err(sbi, "Wrong cp_pack_start_sum: %u",
+			 cp_pack_start_sum);
+		return 1;
+	}
+
+	if (__is_set_ckpt_flags(ckpt, CP_LARGE_NAT_BITMAP_FLAG) &&
+		le32_to_cpu(ckpt->checksum_offset) != CP_MIN_CHKSUM_OFFSET) {
+		f2fs_warn(sbi, "using deprecated layout of large_nat_bitmap, "
+			  "please run fsck v1.13.0 or higher to repair, chksum_offset: %u, "
+			  "fixed with patch: \"f2fs-tools: relocate chksum_offset for large_nat_bitmap feature\"",
+			  le32_to_cpu(ckpt->checksum_offset));
 		return 1;
 	}
 
 	if (unlikely(f2fs_cp_error(sbi))) {
-		f2fs_msg(sbi->sb, KERN_ERR, "A bug case: need to run fsck");
+		f2fs_err(sbi, "A bug case: need to run fsck");
 		return 1;
 	}
 	return 0;
@@ -2703,6 +2734,8 @@ static void init_sb_info(struct f2fs_sb_info *sbi)
 	sbi->interval_time[DISCARD_TIME] = DEF_IDLE_INTERVAL;
 	sbi->interval_time[GC_TIME] = DEF_IDLE_INTERVAL;
 	sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_INTERVAL;
+	sbi->interval_time[UMOUNT_DISCARD_TIMEOUT] =
+				DEF_UMOUNT_DISCARD_TIMEOUT;
 	clear_sbi_flag(sbi, SBI_NEED_FSCK);
 
 	for (i = 0; i < NR_COUNT_TYPE; i++)
@@ -2765,9 +2798,11 @@ static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
 	if (nr_sectors & (bdev_zone_sectors(bdev) - 1))
 		FDEV(devi).nr_blkz++;
 
-	FDEV(devi).blkz_type = f2fs_kmalloc(sbi, FDEV(devi).nr_blkz,
-								GFP_KERNEL);
-	if (!FDEV(devi).blkz_type)
+	FDEV(devi).blkz_seq = f2fs_kzalloc(sbi,
+					BITS_TO_LONGS(FDEV(devi).nr_blkz)
+					* sizeof(unsigned long),
+					GFP_KERNEL);
+	if (!FDEV(devi).blkz_seq)
 		return -ENOMEM;
 
 #define F2FS_REPORT_NR_ZONES   4096
@@ -2794,7 +2829,8 @@ static int init_blkz_info(struct f2fs_sb_info *sbi, int devi)
 		}
 
 		for (i = 0; i < nr_zones; i++) {
-			FDEV(devi).blkz_type[n] = zones[i].type;
+			if (zones[i].type != BLK_ZONE_TYPE_CONVENTIONAL)
+				set_bit(n, FDEV(devi).blkz_seq);
 			sector += zones[i].len;
 			n++;
 		}
@@ -2829,18 +2865,17 @@ static int read_raw_super_block(struct f2fs_sb_info *sbi,
 	for (block = 0; block < 2; block++) {
 		bh = sb_bread(sb, block);
 		if (!bh) {
-			f2fs_msg(sb, KERN_ERR, "Unable to read %dth superblock",
-				block + 1);
+			f2fs_err(sbi, "Unable to read %dth superblock",
+				 block + 1);
 			err = -EIO;
 			continue;
 		}
 
 		/* sanity checking of raw super */
 		if (sanity_check_raw_super(sbi, bh)) {
-			f2fs_msg(sb, KERN_ERR,
-				"Can't find valid F2FS filesystem in %dth superblock",
-				block + 1);
-			err = -EINVAL;
+			f2fs_err(sbi, "Can't find valid F2FS filesystem in %dth superblock",
+				 block + 1);
+			err = -EFSCORRUPTED;
 			brelse(bh);
 			continue;
 		}
@@ -2969,36 +3004,32 @@ static int f2fs_scan_devices(struct f2fs_sb_info *sbi)
 #ifdef CONFIG_BLK_DEV_ZONED
 		if (bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HM &&
 				!f2fs_sb_has_blkzoned(sbi)) {
-			f2fs_msg(sbi->sb, KERN_ERR,
-				"Zoned block device feature not enabled\n");
+			f2fs_err(sbi, "Zoned block device feature not enabled\n");
 			return -EINVAL;
 		}
 		if (bdev_zoned_model(FDEV(i).bdev) != BLK_ZONED_NONE) {
 			if (init_blkz_info(sbi, i)) {
-				f2fs_msg(sbi->sb, KERN_ERR,
-					"Failed to initialize F2FS blkzone information");
+				f2fs_err(sbi, "Failed to initialize F2FS blkzone information");
 				return -EINVAL;
 			}
 			if (max_devices == 1)
 				break;
-			f2fs_msg(sbi->sb, KERN_INFO,
-				"Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
-				i, FDEV(i).path,
-				FDEV(i).total_segments,
-				FDEV(i).start_blk, FDEV(i).end_blk,
-				bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
-				"Host-aware" : "Host-managed");
+			f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x (zone: %s)",
+				  i, FDEV(i).path,
+				  FDEV(i).total_segments,
+				  FDEV(i).start_blk, FDEV(i).end_blk,
+				  bdev_zoned_model(FDEV(i).bdev) == BLK_ZONED_HA ?
+				  "Host-aware" : "Host-managed");
 			continue;
 		}
 #endif
-		f2fs_msg(sbi->sb, KERN_INFO,
-			"Mount Device [%2d]: %20s, %8u, %8x - %8x",
-				i, FDEV(i).path,
-				FDEV(i).total_segments,
-				FDEV(i).start_blk, FDEV(i).end_blk);
-	}
-	f2fs_msg(sbi->sb, KERN_INFO,
-			"IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
+		f2fs_info(sbi, "Mount Device [%2d]: %20s, %8u, %8x - %8x",
+			  i, FDEV(i).path,
+			  FDEV(i).total_segments,
+			  FDEV(i).start_blk, FDEV(i).end_blk);
+	}
+	f2fs_info(sbi,
+		  "IO Block Size: %8d KB", F2FS_IO_SIZE_KB(sbi));
 	return 0;
 }
 
@@ -3022,10 +3053,11 @@ static int f2fs_fill_super(struct super_block *sb, void *data, int silent)
 	struct f2fs_super_block *raw_super;
 	struct inode *root;
 	int err;
-	bool retry = true, need_fsck = false;
+	bool skip_recovery = false, need_fsck = false;
 	char *options = NULL;
 	int recovery, i, valid_super_block;
 	struct curseg_info *seg_i;
+	int retry_cnt = 1;
 
 try_onemore:
 	err = -EINVAL;
@@ -3043,7 +3075,7 @@ try_onemore:
 	/* Load the checksum driver */
 	sbi->s_chksum_driver = crypto_alloc_shash("crc32", 0, 0);
 	if (IS_ERR(sbi->s_chksum_driver)) {
-		f2fs_msg(sb, KERN_ERR, "Cannot load crc32 driver.");
+		f2fs_err(sbi, "Cannot load crc32 driver.");
 		err = PTR_ERR(sbi->s_chksum_driver);
 		sbi->s_chksum_driver = NULL;
 		goto free_sbi;
@@ -3051,7 +3083,7 @@ try_onemore:
 
 	/* set a block size */
 	if (unlikely(!sb_set_blocksize(sb, F2FS_BLKSIZE))) {
-		f2fs_msg(sb, KERN_ERR, "unable to set blocksize");
+		f2fs_err(sbi, "unable to set blocksize");
 		goto free_sbi;
 	}
 
@@ -3075,8 +3107,7 @@ try_onemore:
 	 */
 #ifndef CONFIG_BLK_DEV_ZONED
 	if (f2fs_sb_has_blkzoned(sbi)) {
-		f2fs_msg(sb, KERN_ERR,
-			 "Zoned block device support is not enabled\n");
+		f2fs_err(sbi, "Zoned block device support is not enabled");
 		err = -EOPNOTSUPP;
 		goto free_sb_buf;
 	}
@@ -3097,14 +3128,10 @@ try_onemore:
 	sb->s_maxbytes = sbi->max_file_blocks <<
 				le32_to_cpu(raw_super->log_blocksize);
 	sb->s_max_links = F2FS_LINK_MAX;
-	get_random_bytes(&sbi->s_next_generation, sizeof(u32));
 
 #ifdef CONFIG_QUOTA
 	sb->dq_op = &f2fs_quota_operations;
-	if (f2fs_sb_has_quota_ino(sbi))
-		sb->s_qcop = &dquot_quotactl_sysfile_ops;
-	else
-		sb->s_qcop = &f2fs_quotactl_ops;
+	sb->s_qcop = &f2fs_quotactl_ops;
 	sb->s_quota_types = QTYPE_MASK_USR | QTYPE_MASK_GRP | QTYPE_MASK_PRJ;
 
 	if (f2fs_sb_has_quota_ino(sbi)) {
@@ -3116,7 +3143,7 @@ try_onemore:
 #endif
 
 	sb->s_op = &f2fs_sops;
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	sb->s_cop = &f2fs_cryptops;
 #endif
 	sb->s_xattr = f2fs_xattr_handlers;
@@ -3133,6 +3160,7 @@ try_onemore:
 	mutex_init(&sbi->gc_mutex);
 	mutex_init(&sbi->writepages);
 	mutex_init(&sbi->cp_mutex);
+	mutex_init(&sbi->resize_mutex);
 	init_rwsem(&sbi->node_write);
 	init_rwsem(&sbi->node_change);
 
@@ -3168,6 +3196,7 @@ try_onemore:
 	}
 
 	init_rwsem(&sbi->cp_rwsem);
+	init_rwsem(&sbi->quota_sem);
 	init_waitqueue_head(&sbi->cp_wait);
 	init_sb_info(sbi);
 
@@ -3187,24 +3216,31 @@ try_onemore:
 	/* get an inode for meta space */
 	sbi->meta_inode = f2fs_iget(sb, F2FS_META_INO(sbi));
 	if (IS_ERR(sbi->meta_inode)) {
-		f2fs_msg(sb, KERN_ERR, "Failed to read F2FS meta data inode");
+		f2fs_err(sbi, "Failed to read F2FS meta data inode");
 		err = PTR_ERR(sbi->meta_inode);
 		goto free_io_dummy;
 	}
 
 	err = f2fs_get_valid_checkpoint(sbi);
 	if (err) {
-		f2fs_msg(sb, KERN_ERR, "Failed to get valid F2FS checkpoint");
+		f2fs_err(sbi, "Failed to get valid F2FS checkpoint");
 		goto free_meta_inode;
 	}
 
 	if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_QUOTA_NEED_FSCK_FLAG))
 		set_sbi_flag(sbi, SBI_QUOTA_NEED_REPAIR);
+	if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_DISABLED_QUICK_FLAG)) {
+		set_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
+		sbi->interval_time[DISABLE_TIME] = DEF_DISABLE_QUICK_INTERVAL;
+	}
+
+	if (__is_set_ckpt_flags(F2FS_CKPT(sbi), CP_FSCK_FLAG))
+		set_sbi_flag(sbi, SBI_NEED_FSCK);
 
 	/* Initialize device list */
 	err = f2fs_scan_devices(sbi);
 	if (err) {
-		f2fs_msg(sb, KERN_ERR, "Failed to find devices");
+		f2fs_err(sbi, "Failed to find devices");
 		goto free_devices;
 	}
 
@@ -3224,6 +3260,7 @@ try_onemore:
 		INIT_LIST_HEAD(&sbi->inode_list[i]);
 		spin_lock_init(&sbi->inode_lock[i]);
 	}
+	mutex_init(&sbi->flush_lock);
 
 	f2fs_init_extent_cache_info(sbi);
 
@@ -3234,14 +3271,14 @@ try_onemore:
 	/* setup f2fs internal modules */
 	err = f2fs_build_segment_manager(sbi);
 	if (err) {
-		f2fs_msg(sb, KERN_ERR,
-			"Failed to initialize F2FS segment manager");
+		f2fs_err(sbi, "Failed to initialize F2FS segment manager (%d)",
+			 err);
 		goto free_sm;
 	}
 	err = f2fs_build_node_manager(sbi);
 	if (err) {
-		f2fs_msg(sb, KERN_ERR,
-			"Failed to initialize F2FS node manager");
+		f2fs_err(sbi, "Failed to initialize F2FS node manager (%d)",
+			 err);
 		goto free_nm;
 	}
 
@@ -3266,7 +3303,7 @@ try_onemore:
 	/* get an inode for node space */
 	sbi->node_inode = f2fs_iget(sb, F2FS_NODE_INO(sbi));
 	if (IS_ERR(sbi->node_inode)) {
-		f2fs_msg(sb, KERN_ERR, "Failed to read node inode");
+		f2fs_err(sbi, "Failed to read node inode");
 		err = PTR_ERR(sbi->node_inode);
 		goto free_stats;
 	}
@@ -3274,7 +3311,7 @@ try_onemore:
 	/* read root inode and dentry */
 	root = f2fs_iget(sb, F2FS_ROOT_INO(sbi));
 	if (IS_ERR(root)) {
-		f2fs_msg(sb, KERN_ERR, "Failed to read root inode");
+		f2fs_err(sbi, "Failed to read root inode");
 		err = PTR_ERR(root);
 		goto free_node_inode;
 	}
@@ -3288,7 +3325,7 @@ try_onemore:
 	sb->s_root = d_make_root(root); /* allocate root dentry */
 	if (!sb->s_root) {
 		err = -ENOMEM;
-		goto free_root_inode;
+		goto free_node_inode;
 	}
 
 	err = f2fs_register_sysfs(sbi);
@@ -3300,8 +3337,7 @@ try_onemore:
 	if (f2fs_sb_has_quota_ino(sbi) && !f2fs_readonly(sb)) {
 		err = f2fs_enable_quotas(sb);
 		if (err)
-			f2fs_msg(sb, KERN_ERR,
-				"Cannot turn on quotas: error %d", err);
+			f2fs_err(sbi, "Cannot turn on quotas: error %d", err);
 	}
 #endif
 	/* if there are nt orphan nodes free them */
@@ -3310,7 +3346,7 @@ try_onemore:
 		goto free_meta;
 
 	if (unlikely(is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)))
-		goto skip_recovery;
+		goto reset_checkpoint;
 
 	/* recover fsynced data */
 	if (!test_opt(sbi, DISABLE_ROLL_FORWARD)) {
@@ -3318,23 +3354,29 @@ try_onemore:
 		 * mount should be failed, when device has readonly mode, and
 		 * previous checkpoint was not done by clean system shutdown.
 		 */
-		if (bdev_read_only(sb->s_bdev) &&
-				!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
-			err = -EROFS;
-			goto free_meta;
+		if (f2fs_hw_is_readonly(sbi)) {
+			if (!is_set_ckpt_flags(sbi, CP_UMOUNT_FLAG)) {
+				err = -EROFS;
+				f2fs_err(sbi, "Need to recover fsync data, but write access unavailable");
+				goto free_meta;
+			}
+			f2fs_info(sbi, "write access unavailable, skipping recovery");
+			goto reset_checkpoint;
 		}
 
 		if (need_fsck)
 			set_sbi_flag(sbi, SBI_NEED_FSCK);
 
-		if (!retry)
-			goto skip_recovery;
+		if (skip_recovery)
+			goto reset_checkpoint;
 
 		err = f2fs_recover_fsync_data(sbi, false);
 		if (err < 0) {
+			if (err != -ENOMEM)
+				skip_recovery = true;
 			need_fsck = true;
-			f2fs_msg(sb, KERN_ERR,
-				"Cannot recover all fsync data errno=%d", err);
+			f2fs_err(sbi, "Cannot recover all fsync data errno=%d",
+				 err);
 			goto free_meta;
 		}
 	} else {
@@ -3342,19 +3384,18 @@ try_onemore:
 
 		if (!f2fs_readonly(sb) && err > 0) {
 			err = -EINVAL;
-			f2fs_msg(sb, KERN_ERR,
-				"Need to recover fsync data");
+			f2fs_err(sbi, "Need to recover fsync data");
 			goto free_meta;
 		}
 	}
-skip_recovery:
+reset_checkpoint:
 	/* f2fs_recover_fsync_data() cleared this already */
 	clear_sbi_flag(sbi, SBI_POR_DOING);
 
 	if (test_opt(sbi, DISABLE_CHECKPOINT)) {
 		err = f2fs_disable_checkpoint(sbi);
 		if (err)
-			goto free_meta;
+			goto sync_free_meta;
 	} else if (is_set_ckpt_flags(sbi, CP_DISABLED_FLAG)) {
 		f2fs_enable_checkpoint(sbi);
 	}
@@ -3367,28 +3408,33 @@ skip_recovery:
 		/* After POR, we can run background GC thread.*/
 		err = f2fs_start_gc_thread(sbi);
 		if (err)
-			goto free_meta;
+			goto sync_free_meta;
 	}
 	kvfree(options);
 
 	/* recover broken superblock */
 	if (recovery) {
 		err = f2fs_commit_super(sbi, true);
-		f2fs_msg(sb, KERN_INFO,
-			"Try to recover %dth superblock, ret: %d",
-			sbi->valid_super_block ? 1 : 2, err);
+		f2fs_info(sbi, "Try to recover %dth superblock, ret: %d",
+			  sbi->valid_super_block ? 1 : 2, err);
 	}
 
 	f2fs_join_shrinker(sbi);
 
 	f2fs_tuning_parameters(sbi);
 
-	f2fs_msg(sbi->sb, KERN_NOTICE, "Mounted with checkpoint version = %llx",
-				cur_cp_version(F2FS_CKPT(sbi)));
+	f2fs_notice(sbi, "Mounted with checkpoint version = %llx",
+		    cur_cp_version(F2FS_CKPT(sbi)));
 	f2fs_update_time(sbi, CP_TIME);
 	f2fs_update_time(sbi, REQ_TIME);
+	clear_sbi_flag(sbi, SBI_CP_DISABLED_QUICK);
 	return 0;
 
+sync_free_meta:
+	/* safe to flush all the data */
+	sync_filesystem(sbi->sb);
+	retry_cnt = 0;
+
 free_meta:
 #ifdef CONFIG_QUOTA
 	f2fs_truncate_quota_inode_pages(sb);
@@ -3402,6 +3448,8 @@ free_meta:
 	 * falls into an infinite loop in f2fs_sync_meta_pages().
 	 */
 	truncate_inode_pages_final(META_MAPPING(sbi));
+	/* evict some inodes being cached by GC */
+	evict_inodes(sb);
 	f2fs_unregister_sysfs(sbi);
 free_root_inode:
 	dput(sb->s_root);
@@ -3410,6 +3458,7 @@ free_node_inode:
 	f2fs_release_ino_entry(sbi, true);
 	truncate_inode_pages_final(NODE_MAPPING(sbi));
 	iput(sbi->node_inode);
+	sbi->node_inode = NULL;
 free_stats:
 	f2fs_destroy_stats(sbi);
 free_nm:
@@ -3422,6 +3471,7 @@ free_devices:
 free_meta_inode:
 	make_bad_inode(sbi->meta_inode);
 	iput(sbi->meta_inode);
+	sbi->meta_inode = NULL;
 free_io_dummy:
 	mempool_destroy(sbi->write_io_dummy);
 free_percpu:
@@ -3443,8 +3493,8 @@ free_sbi:
 	kvfree(sbi);
 
 	/* give only one another chance */
-	if (retry) {
-		retry = false;
+	if (retry_cnt > 0 && skip_recovery) {
+		retry_cnt--;
 		shrink_dcache_sb(sb);
 		goto try_onemore;
 	}
@@ -3545,9 +3595,7 @@ static int __init init_f2fs_fs(void)
 	err = register_filesystem(&f2fs_fs_type);
 	if (err)
 		goto free_shrinker;
-	err = f2fs_create_root_stats();
-	if (err)
-		goto free_filesystem;
+	f2fs_create_root_stats();
 	err = f2fs_init_post_read_processing();
 	if (err)
 		goto free_root_stats;
@@ -3555,7 +3603,6 @@ static int __init init_f2fs_fs(void)
 
 free_root_stats:
 	f2fs_destroy_root_stats();
-free_filesystem:
 	unregister_filesystem(&f2fs_fs_type);
 free_shrinker:
 	unregister_shrinker(&f2fs_shrinker_info);
diff --git a/fs/f2fs/sysfs.c b/fs/f2fs/sysfs.c
index 0575edbe3ed6..3aeacd0aacfd 100644
--- a/fs/f2fs/sysfs.c
+++ b/fs/f2fs/sysfs.c
@@ -68,6 +68,20 @@ static ssize_t dirty_segments_show(struct f2fs_attr *a,
 		(unsigned long long)(dirty_segments(sbi)));
 }
 
+static ssize_t unusable_show(struct f2fs_attr *a,
+		struct f2fs_sb_info *sbi, char *buf)
+{
+	block_t unusable;
+
+	if (test_opt(sbi, DISABLE_CHECKPOINT))
+		unusable = sbi->unusable_block_count;
+	else
+		unusable = f2fs_get_unusable_blocks(sbi);
+	return snprintf(buf, PAGE_SIZE, "%llu\n",
+		(unsigned long long)unusable);
+}
+
+
 static ssize_t lifetime_write_kbytes_show(struct f2fs_attr *a,
 		struct f2fs_sb_info *sbi, char *buf)
 {
@@ -222,6 +236,8 @@ out:
 #ifdef CONFIG_F2FS_FAULT_INJECTION
 	if (a->struct_type == FAULT_INFO_TYPE && t >= (1 << FAULT_MAX))
 		return -EINVAL;
+	if (a->struct_type == FAULT_INFO_RATE && t >= UINT_MAX)
+		return -EINVAL;
 #endif
 	if (a->struct_type == RESERVED_BLOCKS) {
 		spin_lock(&sbi->stat_lock);
@@ -278,10 +294,16 @@ out:
 		return count;
 	}
 
-	*ui = t;
 
-	if (!strcmp(a->attr.name, "iostat_enable") && *ui == 0)
-		f2fs_reset_iostat(sbi);
+	if (!strcmp(a->attr.name, "iostat_enable")) {
+		sbi->iostat_enable = !!t;
+		if (!sbi->iostat_enable)
+			f2fs_reset_iostat(sbi);
+		return count;
+	}
+
+	*ui = (unsigned int)t;
+
 	return count;
 }
 
@@ -418,6 +440,8 @@ F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, idle_interval, interval_time[REQ_TIME]);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, discard_idle_interval,
 					interval_time[DISCARD_TIME]);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_idle_interval, interval_time[GC_TIME]);
+F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info,
+		umount_discard_timeout, interval_time[UMOUNT_DISCARD_TIMEOUT]);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, iostat_enable, iostat_enable);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, readdir_ra, readdir_ra);
 F2FS_RW_ATTR(F2FS_SBI, f2fs_sb_info, gc_pin_file_thresh, gc_pin_file_threshold);
@@ -430,8 +454,9 @@ F2FS_GENERAL_RO_ATTR(dirty_segments);
 F2FS_GENERAL_RO_ATTR(lifetime_write_kbytes);
 F2FS_GENERAL_RO_ATTR(features);
 F2FS_GENERAL_RO_ATTR(current_reserved_blocks);
+F2FS_GENERAL_RO_ATTR(unusable);
 
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 F2FS_FEATURE_RO_ATTR(encryption, FEAT_CRYPTO);
 #endif
 #ifdef CONFIG_BLK_DEV_ZONED
@@ -475,6 +500,7 @@ static struct attribute *f2fs_attrs[] = {
 	ATTR_LIST(idle_interval),
 	ATTR_LIST(discard_idle_interval),
 	ATTR_LIST(gc_idle_interval),
+	ATTR_LIST(umount_discard_timeout),
 	ATTR_LIST(iostat_enable),
 	ATTR_LIST(readdir_ra),
 	ATTR_LIST(gc_pin_file_thresh),
@@ -484,15 +510,17 @@ static struct attribute *f2fs_attrs[] = {
 	ATTR_LIST(inject_type),
 #endif
 	ATTR_LIST(dirty_segments),
+	ATTR_LIST(unusable),
 	ATTR_LIST(lifetime_write_kbytes),
 	ATTR_LIST(features),
 	ATTR_LIST(reserved_blocks),
 	ATTR_LIST(current_reserved_blocks),
 	NULL,
 };
+ATTRIBUTE_GROUPS(f2fs);
 
 static struct attribute *f2fs_feat_attrs[] = {
-#ifdef CONFIG_F2FS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 	ATTR_LIST(encryption),
 #endif
 #ifdef CONFIG_BLK_DEV_ZONED
@@ -509,6 +537,7 @@ static struct attribute *f2fs_feat_attrs[] = {
 	ATTR_LIST(sb_checksum),
 	NULL,
 };
+ATTRIBUTE_GROUPS(f2fs_feat);
 
 static const struct sysfs_ops f2fs_attr_ops = {
 	.show	= f2fs_attr_show,
@@ -516,7 +545,7 @@ static const struct sysfs_ops f2fs_attr_ops = {
 };
 
 static struct kobj_type f2fs_sb_ktype = {
-	.default_attrs	= f2fs_attrs,
+	.default_groups = f2fs_groups,
 	.sysfs_ops	= &f2fs_attr_ops,
 	.release	= f2fs_sb_release,
 };
@@ -530,7 +559,7 @@ static struct kset f2fs_kset = {
 };
 
 static struct kobj_type f2fs_feat_ktype = {
-	.default_attrs	= f2fs_feat_attrs,
+	.default_groups = f2fs_feat_groups,
 	.sysfs_ops	= &f2fs_attr_ops,
 };
 
@@ -555,8 +584,7 @@ static int __maybe_unused segment_info_seq_show(struct seq_file *seq,
 
 		if ((i % 10) == 0)
 			seq_printf(seq, "%-10d", i);
-		seq_printf(seq, "%d|%-3u", se->type,
-					get_valid_blocks(sbi, i, false));
+		seq_printf(seq, "%d|%-3u", se->type, se->valid_blocks);
 		if ((i % 10) == 9 || i == (total_segs - 1))
 			seq_putc(seq, '\n');
 		else
@@ -582,8 +610,7 @@ static int __maybe_unused segment_bits_seq_show(struct seq_file *seq,
 		struct seg_entry *se = get_seg_entry(sbi, i);
 
 		seq_printf(seq, "%-10d", i);
-		seq_printf(seq, "%d|%-3u|", se->type,
-					get_valid_blocks(sbi, i, false));
+		seq_printf(seq, "%d|%-3u|", se->type, se->valid_blocks);
 		for (j = 0; j < SIT_VBLOCK_MAP_SIZE; j++)
 			seq_printf(seq, " %.2x", se->cur_valid_map[j]);
 		seq_putc(seq, '\n');
diff --git a/fs/f2fs/trace.c b/fs/f2fs/trace.c
index ce2a5eb210b6..d0ab533a9ce8 100644
--- a/fs/f2fs/trace.c
+++ b/fs/f2fs/trace.c
@@ -14,7 +14,7 @@
 #include "trace.h"
 
 static RADIX_TREE(pids, GFP_ATOMIC);
-static struct mutex pids_lock;
+static spinlock_t pids_lock;
 static struct last_io_info last_io;
 
 static inline void __print_last_io(void)
@@ -58,23 +58,29 @@ void f2fs_trace_pid(struct page *page)
 
 	set_page_private(page, (unsigned long)pid);
 
+retry:
 	if (radix_tree_preload(GFP_NOFS))
 		return;
 
-	mutex_lock(&pids_lock);
+	spin_lock(&pids_lock);
 	p = radix_tree_lookup(&pids, pid);
 	if (p == current)
 		goto out;
 	if (p)
 		radix_tree_delete(&pids, pid);
 
-	f2fs_radix_tree_insert(&pids, pid, current);
+	if (radix_tree_insert(&pids, pid, current)) {
+		spin_unlock(&pids_lock);
+		radix_tree_preload_end();
+		cond_resched();
+		goto retry;
+	}
 
 	trace_printk("%3x:%3x %4x %-16s\n",
 			MAJOR(inode->i_sb->s_dev), MINOR(inode->i_sb->s_dev),
 			pid, current->comm);
 out:
-	mutex_unlock(&pids_lock);
+	spin_unlock(&pids_lock);
 	radix_tree_preload_end();
 }
 
@@ -119,7 +125,7 @@ void f2fs_trace_ios(struct f2fs_io_info *fio, int flush)
 
 void f2fs_build_trace_ios(void)
 {
-	mutex_init(&pids_lock);
+	spin_lock_init(&pids_lock);
 }
 
 #define PIDVEC_SIZE	128
@@ -147,7 +153,7 @@ void f2fs_destroy_trace_ios(void)
 	pid_t next_pid = 0;
 	unsigned int found;
 
-	mutex_lock(&pids_lock);
+	spin_lock(&pids_lock);
 	while ((found = gang_lookup_pids(pid, next_pid, PIDVEC_SIZE))) {
 		unsigned idx;
 
@@ -155,5 +161,5 @@ void f2fs_destroy_trace_ios(void)
 		for (idx = 0; idx < found; idx++)
 			radix_tree_delete(&pids, pid[idx]);
 	}
-	mutex_unlock(&pids_lock);
+	spin_unlock(&pids_lock);
 }
diff --git a/fs/f2fs/xattr.c b/fs/f2fs/xattr.c
index 18d5ffbc5e8c..b32c45621679 100644
--- a/fs/f2fs/xattr.c
+++ b/fs/f2fs/xattr.c
@@ -202,12 +202,17 @@ static inline const struct xattr_handler *f2fs_xattr_handler(int index)
 	return handler;
 }
 
-static struct f2fs_xattr_entry *__find_xattr(void *base_addr, int index,
-					size_t len, const char *name)
+static struct f2fs_xattr_entry *__find_xattr(void *base_addr,
+				void *last_base_addr, int index,
+				size_t len, const char *name)
 {
 	struct f2fs_xattr_entry *entry;
 
 	list_for_each_xattr(entry, base_addr) {
+		if ((void *)(entry) + sizeof(__u32) > last_base_addr ||
+			(void *)XATTR_NEXT_ENTRY(entry) > last_base_addr)
+			return NULL;
+
 		if (entry->e_name_index != index)
 			continue;
 		if (entry->e_name_len != len)
@@ -224,11 +229,11 @@ static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode,
 {
 	struct f2fs_xattr_entry *entry;
 	unsigned int inline_size = inline_xattr_size(inode);
+	void *max_addr = base_addr + inline_size;
 
 	list_for_each_xattr(entry, base_addr) {
-		if ((void *)entry + sizeof(__u32) > base_addr + inline_size ||
-			(void *)XATTR_NEXT_ENTRY(entry) + sizeof(__u32) >
-			base_addr + inline_size) {
+		if ((void *)entry + sizeof(__u32) > max_addr ||
+			(void *)XATTR_NEXT_ENTRY(entry) > max_addr) {
 			*last_addr = entry;
 			return NULL;
 		}
@@ -239,6 +244,13 @@ static struct f2fs_xattr_entry *__find_inline_xattr(struct inode *inode,
 		if (!memcmp(entry->e_name, name, len))
 			break;
 	}
+
+	/* inline xattr header or entry across max inline xattr size */
+	if (IS_XATTR_LAST_ENTRY(entry) &&
+		(void *)entry + sizeof(__u32) > max_addr) {
+		*last_addr = entry;
+		return NULL;
+	}
 	return entry;
 }
 
@@ -290,20 +302,22 @@ static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
 				const char *name, struct f2fs_xattr_entry **xe,
 				void **base_addr, int *base_size)
 {
-	void *cur_addr, *txattr_addr, *last_addr = NULL;
+	void *cur_addr, *txattr_addr, *last_txattr_addr;
+	void *last_addr = NULL;
 	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
-	unsigned int size = xnid ? VALID_XATTR_BLOCK_SIZE : 0;
 	unsigned int inline_size = inline_xattr_size(inode);
 	int err = 0;
 
-	if (!size && !inline_size)
+	if (!xnid && !inline_size)
 		return -ENODATA;
 
-	*base_size = inline_size + size + XATTR_PADDING_SIZE;
+	*base_size = XATTR_SIZE(xnid, inode) + XATTR_PADDING_SIZE;
 	txattr_addr = f2fs_kzalloc(F2FS_I_SB(inode), *base_size, GFP_NOFS);
 	if (!txattr_addr)
 		return -ENOMEM;
 
+	last_txattr_addr = (void *)txattr_addr + XATTR_SIZE(xnid, inode);
+
 	/* read from inline xattr */
 	if (inline_size) {
 		err = read_inline_xattr(inode, ipage, txattr_addr);
@@ -330,7 +344,14 @@ static int lookup_all_xattrs(struct inode *inode, struct page *ipage,
 	else
 		cur_addr = txattr_addr;
 
-	*xe = __find_xattr(cur_addr, index, len, name);
+	*xe = __find_xattr(cur_addr, last_txattr_addr, index, len, name);
+	if (!*xe) {
+		f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
+								inode->i_ino);
+		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
+		err = -EFSCORRUPTED;
+		goto out;
+	}
 check:
 	if (IS_XATTR_LAST_ENTRY(*xe)) {
 		err = -ENODATA;
@@ -340,7 +361,7 @@ check:
 	*base_addr = txattr_addr;
 	return 0;
 out:
-	kzfree(txattr_addr);
+	kvfree(txattr_addr);
 	return err;
 }
 
@@ -383,7 +404,7 @@ static int read_all_xattrs(struct inode *inode, struct page *ipage,
 	*base_addr = txattr_addr;
 	return 0;
 fail:
-	kzfree(txattr_addr);
+	kvfree(txattr_addr);
 	return err;
 }
 
@@ -510,7 +531,7 @@ int f2fs_getxattr(struct inode *inode, int index, const char *name,
 	}
 	error = size;
 out:
-	kzfree(base_addr);
+	kvfree(base_addr);
 	return error;
 }
 
@@ -538,7 +559,7 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
 		if (!handler || (handler->list && !handler->list(dentry)))
 			continue;
 
-		prefix = handler->prefix ?: handler->name;
+		prefix = xattr_prefix(handler);
 		prefix_len = strlen(prefix);
 		size = prefix_len + entry->e_name_len + 1;
 		if (buffer) {
@@ -556,7 +577,7 @@ ssize_t f2fs_listxattr(struct dentry *dentry, char *buffer, size_t buffer_size)
 	}
 	error = buffer_size - rest;
 cleanup:
-	kzfree(base_addr);
+	kvfree(base_addr);
 	return error;
 }
 
@@ -574,7 +595,8 @@ static int __f2fs_setxattr(struct inode *inode, int index,
 			struct page *ipage, int flags)
 {
 	struct f2fs_xattr_entry *here, *last;
-	void *base_addr;
+	void *base_addr, *last_base_addr;
+	nid_t xnid = F2FS_I(inode)->i_xattr_nid;
 	int found, newsize;
 	size_t len;
 	__u32 new_hsize;
@@ -598,8 +620,17 @@ static int __f2fs_setxattr(struct inode *inode, int index,
 	if (error)
 		return error;
 
+	last_base_addr = (void *)base_addr + XATTR_SIZE(xnid, inode);
+
 	/* find entry with wanted name. */
-	here = __find_xattr(base_addr, index, len, name);
+	here = __find_xattr(base_addr, last_base_addr, index, len, name);
+	if (!here) {
+		f2fs_err(F2FS_I_SB(inode), "inode (%lu) has corrupted xattr",
+								inode->i_ino);
+		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_FSCK);
+		error = -EFSCORRUPTED;
+		goto exit;
+	}
 
 	found = IS_XATTR_LAST_ENTRY(here) ? 0 : 1;
 
@@ -687,7 +718,7 @@ static int __f2fs_setxattr(struct inode *inode, int index,
 	if (!error && S_ISDIR(inode->i_mode))
 		set_sbi_flag(F2FS_I_SB(inode), SBI_NEED_CP);
 exit:
-	kzfree(base_addr);
+	kvfree(base_addr);
 	return error;
 }
 
diff --git a/fs/f2fs/xattr.h b/fs/f2fs/xattr.h
index 67db134da0f5..a90920e2f949 100644
--- a/fs/f2fs/xattr.h
+++ b/fs/f2fs/xattr.h
@@ -71,6 +71,8 @@ struct f2fs_xattr_entry {
 				entry = XATTR_NEXT_ENTRY(entry))
 #define VALID_XATTR_BLOCK_SIZE	(PAGE_SIZE - sizeof(struct node_footer))
 #define XATTR_PADDING_SIZE	(sizeof(__u32))
+#define XATTR_SIZE(x,i)		(((x) ? VALID_XATTR_BLOCK_SIZE : 0) +	\
+						(inline_xattr_size(i)))
 #define MIN_OFFSET(i)		XATTR_ALIGN(inline_xattr_size(i) +	\
 						VALID_XATTR_BLOCK_SIZE)
 
@@ -78,6 +80,12 @@ struct f2fs_xattr_entry {
 				sizeof(struct f2fs_xattr_header) -	\
 				sizeof(struct f2fs_xattr_entry))
 
+#define MAX_INLINE_XATTR_SIZE						\
+			(DEF_ADDRS_PER_INODE -				\
+			F2FS_TOTAL_EXTRA_ATTR_SIZE / sizeof(__le32) -	\
+			DEF_INLINE_RESERVED_SIZE -			\
+			MIN_INLINE_DENTRY_SIZE / sizeof(__le32))
+
 /*
  * On-disk structure of f2fs_xattr
  * We use inline xattrs space + 1 block for xattr.
diff --git a/fs/fat/Kconfig b/fs/fat/Kconfig
index 3ff1772f612e..718163d0c621 100644
--- a/fs/fat/Kconfig
+++ b/fs/fat/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config FAT_FS
 	tristate
 	select NLS
diff --git a/fs/fat/dir.c b/fs/fat/dir.c
index 9d01db37183f..1bda2ab6745b 100644
--- a/fs/fat/dir.c
+++ b/fs/fat/dir.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/fat/dir.c
  *
diff --git a/fs/fat/fatent.c b/fs/fat/fatent.c
index 495edeafd60a..265983635f2b 100644
--- a/fs/fat/fatent.c
+++ b/fs/fat/fatent.c
@@ -1,6 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2004, OGAWA Hirofumi
- * Released under GPL v2.
  */
 
 #include <linux/blkdev.h>
diff --git a/fs/fat/file.c b/fs/fat/file.c
index 13935ee99e1e..4614c0ba5f1c 100644
--- a/fs/fat/file.c
+++ b/fs/fat/file.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/fat/file.c
  *
@@ -193,12 +194,17 @@ static int fat_file_release(struct inode *inode, struct file *filp)
 int fat_file_fsync(struct file *filp, loff_t start, loff_t end, int datasync)
 {
 	struct inode *inode = filp->f_mapping->host;
-	int res, err;
+	int err;
+
+	err = __generic_file_fsync(filp, start, end, datasync);
+	if (err)
+		return err;
 
-	res = generic_file_fsync(filp, start, end, datasync);
 	err = sync_mapping_buffers(MSDOS_SB(inode->i_sb)->fat_inode->i_mapping);
+	if (err)
+		return err;
 
-	return res ? res : err;
+	return blkdev_issue_flush(inode->i_sb->s_bdev, GFP_KERNEL, NULL);
 }
 
 
@@ -214,6 +220,7 @@ const struct file_operations fat_file_operations = {
 #endif
 	.fsync		= fat_file_fsync,
 	.splice_read	= generic_file_splice_read,
+	.splice_write	= iter_file_splice_write,
 	.fallocate	= fat_fallocate,
 };
 
diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index 79bb0e73a65f..05689198f5af 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/fat/inode.c
  *
@@ -746,17 +747,11 @@ static struct inode *fat_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void fat_i_callback(struct rcu_head *head)
+static void fat_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(fat_inode_cachep, MSDOS_I(inode));
 }
 
-static void fat_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, fat_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct msdos_inode_info *ei = (struct msdos_inode_info *)foo;
@@ -920,7 +915,7 @@ EXPORT_SYMBOL_GPL(fat_sync_inode);
 static int fat_show_options(struct seq_file *m, struct dentry *root);
 static const struct super_operations fat_sops = {
 	.alloc_inode	= fat_alloc_inode,
-	.destroy_inode	= fat_destroy_inode,
+	.free_inode	= fat_free_inode,
 	.write_inode	= fat_write_inode,
 	.evict_inode	= fat_evict_inode,
 	.put_super	= fat_put_super,
diff --git a/fs/fat/misc.c b/fs/fat/misc.c
index 4fc950bb6433..1e08bd54c5fb 100644
--- a/fs/fat/misc.c
+++ b/fs/fat/misc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/fat/misc.c
  *
diff --git a/fs/fat/namei_msdos.c b/fs/fat/namei_msdos.c
index f2cd365a4e86..9d062886fbc1 100644
--- a/fs/fat/namei_msdos.c
+++ b/fs/fat/namei_msdos.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/msdos/namei.c
  *
diff --git a/fs/fat/namei_vfat.c b/fs/fat/namei_vfat.c
index 996c8c25e9c6..0cdd0fb9f742 100644
--- a/fs/fat/namei_vfat.c
+++ b/fs/fat/namei_vfat.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/vfat/namei.c
  *
diff --git a/fs/fat/nfs.c b/fs/fat/nfs.c
index eb192656fba2..af191371c352 100644
--- a/fs/fat/nfs.c
+++ b/fs/fat/nfs.c
@@ -1,14 +1,5 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* fs/fat/nfs.c
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  */
 
 #include <linux/exportfs.h>
diff --git a/fs/fcntl.c b/fs/fcntl.c
index 083185174c6d..3d40771e8e7c 100644
--- a/fs/fcntl.c
+++ b/fs/fcntl.c
@@ -769,7 +769,7 @@ static void send_sigio_to_task(struct task_struct *p,
 			si.si_fd    = fd;
 			if (!do_send_sig_info(signum, &si, p, type))
 				break;
-		/* fall-through: fall back on the old plain SIGIO signal */
+		/* fall-through - fall back on the old plain SIGIO signal */
 		case 0:
 			do_send_sig_info(SIGIO, SEND_SIG_PRIV, p, type);
 	}
diff --git a/fs/file.c b/fs/file.c
index 3209ee271c41..3da91a112bab 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -457,6 +457,7 @@ struct files_struct init_files = {
 		.full_fds_bits	= init_files.full_fds_bits_init,
 	},
 	.file_lock	= __SPIN_LOCK_UNLOCKED(init_files.file_lock),
+	.resize_wait	= __WAIT_QUEUE_HEAD_INITIALIZER(init_files.resize_wait),
 };
 
 static unsigned int find_next_fd(struct fdtable *fdt, unsigned int start)
@@ -705,7 +706,7 @@ void do_close_on_exec(struct files_struct *files)
 	spin_unlock(&files->file_lock);
 }
 
-static struct file *__fget(unsigned int fd, fmode_t mask)
+static struct file *__fget(unsigned int fd, fmode_t mask, unsigned int refs)
 {
 	struct files_struct *files = current->files;
 	struct file *file;
@@ -720,7 +721,7 @@ loop:
 		 */
 		if (file->f_mode & mask)
 			file = NULL;
-		else if (!get_file_rcu(file))
+		else if (!get_file_rcu_many(file, refs))
 			goto loop;
 	}
 	rcu_read_unlock();
@@ -728,15 +729,20 @@ loop:
 	return file;
 }
 
+struct file *fget_many(unsigned int fd, unsigned int refs)
+{
+	return __fget(fd, FMODE_PATH, refs);
+}
+
 struct file *fget(unsigned int fd)
 {
-	return __fget(fd, FMODE_PATH);
+	return __fget(fd, FMODE_PATH, 1);
 }
 EXPORT_SYMBOL(fget);
 
 struct file *fget_raw(unsigned int fd)
 {
-	return __fget(fd, 0);
+	return __fget(fd, 0, 1);
 }
 EXPORT_SYMBOL(fget_raw);
 
@@ -767,7 +773,7 @@ static unsigned long __fget_light(unsigned int fd, fmode_t mask)
 			return 0;
 		return (unsigned long)file;
 	} else {
-		file = __fget(fd, mask);
+		file = __fget(fd, mask, 1);
 		if (!file)
 			return 0;
 		return FDPUT_FPUT | (unsigned long)file;
diff --git a/fs/file_table.c b/fs/file_table.c
index 5679e7fcb6b0..b07b53f24ff5 100644
--- a/fs/file_table.c
+++ b/fs/file_table.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/file_table.c
  *
@@ -255,6 +256,7 @@ static void __fput(struct file *file)
 	struct dentry *dentry = file->f_path.dentry;
 	struct vfsmount *mnt = file->f_path.mnt;
 	struct inode *inode = file->f_inode;
+	fmode_t mode = file->f_mode;
 
 	if (unlikely(!(file->f_mode & FMODE_OPENED)))
 		goto out;
@@ -277,18 +279,20 @@ static void __fput(struct file *file)
 	if (file->f_op->release)
 		file->f_op->release(inode, file);
 	if (unlikely(S_ISCHR(inode->i_mode) && inode->i_cdev != NULL &&
-		     !(file->f_mode & FMODE_PATH))) {
+		     !(mode & FMODE_PATH))) {
 		cdev_put(inode->i_cdev);
 	}
 	fops_put(file->f_op);
 	put_pid(file->f_owner.pid);
-	if ((file->f_mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
+	if ((mode & (FMODE_READ | FMODE_WRITE)) == FMODE_READ)
 		i_readcount_dec(inode);
-	if (file->f_mode & FMODE_WRITER) {
+	if (mode & FMODE_WRITER) {
 		put_write_access(inode);
 		__mnt_drop_write(mnt);
 	}
 	dput(dentry);
+	if (unlikely(mode & FMODE_NEED_UNMOUNT))
+		dissolve_on_fput(mnt);
 	mntput(mnt);
 out:
 	file_free(file);
@@ -326,9 +330,9 @@ void flush_delayed_fput(void)
 
 static DECLARE_DELAYED_WORK(delayed_fput_work, delayed_fput);
 
-void fput(struct file *file)
+void fput_many(struct file *file, unsigned int refs)
 {
-	if (atomic_long_dec_and_test(&file->f_count)) {
+	if (atomic_long_sub_and_test(refs, &file->f_count)) {
 		struct task_struct *task = current;
 
 		if (likely(!in_interrupt() && !(task->flags & PF_KTHREAD))) {
@@ -347,6 +351,11 @@ void fput(struct file *file)
 	}
 }
 
+void fput(struct file *file)
+{
+	fput_many(file, 1);
+}
+
 /*
  * synchronous analog of fput(); for kernel threads that might be needed
  * in some umount() (and thus can't use flush_delayed_fput() without
diff --git a/fs/filesystems.c b/fs/filesystems.c
index b03f57b1105b..9135646e41ac 100644
--- a/fs/filesystems.c
+++ b/fs/filesystems.c
@@ -16,6 +16,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/uaccess.h>
+#include <linux/fs_parser.h>
 
 /*
  * Handling of filesystem drivers list.
@@ -73,6 +74,9 @@ int register_filesystem(struct file_system_type * fs)
 	int res = 0;
 	struct file_system_type ** p;
 
+	if (fs->parameters && !fs_validate_description(fs->parameters))
+		return -EINVAL;
+
 	BUG_ON(strchr(fs->name, '.'));
 	if (fs->next)
 		return -EBUSY;
diff --git a/fs/freevxfs/Kconfig b/fs/freevxfs/Kconfig
index ce49df1020dd..c05c71d57291 100644
--- a/fs/freevxfs/Kconfig
+++ b/fs/freevxfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config VXFS_FS
 	tristate "FreeVxFS file system support (VERITAS VxFS(TM) compatible)"
 	depends on BLOCK
diff --git a/fs/freevxfs/Makefile b/fs/freevxfs/Makefile
index 87ad097440d6..e6ee59291521 100644
--- a/fs/freevxfs/Makefile
+++ b/fs/freevxfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # VxFS Makefile
 #
diff --git a/fs/freevxfs/vxfs_super.c b/fs/freevxfs/vxfs_super.c
index 48b24bb50d02..a89f68c3cbed 100644
--- a/fs/freevxfs/vxfs_super.c
+++ b/fs/freevxfs/vxfs_super.c
@@ -131,21 +131,14 @@ static struct inode *vxfs_alloc_inode(struct super_block *sb)
 	return &vi->vfs_inode;
 }
 
-static void vxfs_i_callback(struct rcu_head *head)
+static void vxfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-
 	kmem_cache_free(vxfs_inode_cachep, VXFS_INO(inode));
 }
 
-static void vxfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, vxfs_i_callback);
-}
-
 static const struct super_operations vxfs_super_ops = {
 	.alloc_inode		= vxfs_alloc_inode,
-	.destroy_inode		= vxfs_destroy_inode,
+	.free_inode		= vxfs_free_inode,
 	.evict_inode		= vxfs_evict_inode,
 	.put_super		= vxfs_put_super,
 	.statfs			= vxfs_statfs,
diff --git a/fs/fs-writeback.c b/fs/fs-writeback.c
index 36855c1f8daf..9ebfb1b28430 100644
--- a/fs/fs-writeback.c
+++ b/fs/fs-writeback.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/fs-writeback.c
  *
@@ -523,8 +524,6 @@ static void inode_switch_wbs(struct inode *inode, int new_wb_id)
 
 	isw->inode = inode;
 
-	atomic_inc(&isw_nr_in_flight);
-
 	/*
 	 * In addition to synchronizing among switchers, I_WB_SWITCH tells
 	 * the RCU protected stat update paths to grab the i_page
@@ -532,6 +531,9 @@ static void inode_switch_wbs(struct inode *inode, int new_wb_id)
 	 * Let's continue after I_WB_SWITCH is guaranteed to be visible.
 	 */
 	call_rcu(&isw->rcu_head, inode_switch_wbs_rcu_fn);
+
+	atomic_inc(&isw_nr_in_flight);
+
 	goto out_unlock;
 
 out_free:
@@ -713,6 +715,7 @@ void wbc_detach_inode(struct writeback_control *wbc)
 void wbc_account_io(struct writeback_control *wbc, struct page *page,
 		    size_t bytes)
 {
+	struct cgroup_subsys_state *css;
 	int id;
 
 	/*
@@ -724,7 +727,12 @@ void wbc_account_io(struct writeback_control *wbc, struct page *page,
 	if (!wbc->wb)
 		return;
 
-	id = mem_cgroup_css_from_page(page)->id;
+	css = mem_cgroup_css_from_page(page);
+	/* dead cgroups shouldn't contribute to inode ownership arbitration */
+	if (!(css->flags & CSS_ONLINE))
+		return;
+
+	id = css->id;
 
 	if (id == wbc->wb_id) {
 		wbc->wb_bytes += bytes;
@@ -901,7 +909,11 @@ restart:
 void cgroup_writeback_umount(void)
 {
 	if (atomic_read(&isw_nr_in_flight)) {
-		synchronize_rcu();
+		/*
+		 * Use rcu_barrier() to wait for all pending callbacks to
+		 * ensure that all in-flight wb switches are in the workqueue.
+		 */
+		rcu_barrier();
 		flush_workqueue(isw_wq);
 	}
 }
diff --git a/fs/fs_context.c b/fs/fs_context.c
new file mode 100644
index 000000000000..103643c68e3f
--- /dev/null
+++ b/fs/fs_context.c
@@ -0,0 +1,770 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Provide a way to create a superblock configuration context within the kernel
+ * that allows a superblock to be set up prior to mounting.
+ *
+ * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+#include <linux/module.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
+#include <linux/fs.h>
+#include <linux/mount.h>
+#include <linux/nsproxy.h>
+#include <linux/slab.h>
+#include <linux/magic.h>
+#include <linux/security.h>
+#include <linux/mnt_namespace.h>
+#include <linux/pid_namespace.h>
+#include <linux/user_namespace.h>
+#include <net/net_namespace.h>
+#include <asm/sections.h>
+#include "mount.h"
+#include "internal.h"
+
+enum legacy_fs_param {
+	LEGACY_FS_UNSET_PARAMS,
+	LEGACY_FS_MONOLITHIC_PARAMS,
+	LEGACY_FS_INDIVIDUAL_PARAMS,
+};
+
+struct legacy_fs_context {
+	char			*legacy_data;	/* Data page for legacy filesystems */
+	size_t			data_size;
+	enum legacy_fs_param	param_type;
+};
+
+static int legacy_init_fs_context(struct fs_context *fc);
+
+static const struct constant_table common_set_sb_flag[] = {
+	{ "dirsync",	SB_DIRSYNC },
+	{ "lazytime",	SB_LAZYTIME },
+	{ "mand",	SB_MANDLOCK },
+	{ "posixacl",	SB_POSIXACL },
+	{ "ro",		SB_RDONLY },
+	{ "sync",	SB_SYNCHRONOUS },
+};
+
+static const struct constant_table common_clear_sb_flag[] = {
+	{ "async",	SB_SYNCHRONOUS },
+	{ "nolazytime",	SB_LAZYTIME },
+	{ "nomand",	SB_MANDLOCK },
+	{ "rw",		SB_RDONLY },
+	{ "silent",	SB_SILENT },
+};
+
+static const char *const forbidden_sb_flag[] = {
+	"bind",
+	"dev",
+	"exec",
+	"move",
+	"noatime",
+	"nodev",
+	"nodiratime",
+	"noexec",
+	"norelatime",
+	"nostrictatime",
+	"nosuid",
+	"private",
+	"rec",
+	"relatime",
+	"remount",
+	"shared",
+	"slave",
+	"strictatime",
+	"suid",
+	"unbindable",
+};
+
+/*
+ * Check for a common mount option that manipulates s_flags.
+ */
+static int vfs_parse_sb_flag(struct fs_context *fc, const char *key)
+{
+	unsigned int token;
+	unsigned int i;
+
+	for (i = 0; i < ARRAY_SIZE(forbidden_sb_flag); i++)
+		if (strcmp(key, forbidden_sb_flag[i]) == 0)
+			return -EINVAL;
+
+	token = lookup_constant(common_set_sb_flag, key, 0);
+	if (token) {
+		fc->sb_flags |= token;
+		fc->sb_flags_mask |= token;
+		return 0;
+	}
+
+	token = lookup_constant(common_clear_sb_flag, key, 0);
+	if (token) {
+		fc->sb_flags &= ~token;
+		fc->sb_flags_mask |= token;
+		return 0;
+	}
+
+	return -ENOPARAM;
+}
+
+/**
+ * vfs_parse_fs_param - Add a single parameter to a superblock config
+ * @fc: The filesystem context to modify
+ * @param: The parameter
+ *
+ * A single mount option in string form is applied to the filesystem context
+ * being set up.  Certain standard options (for example "ro") are translated
+ * into flag bits without going to the filesystem.  The active security module
+ * is allowed to observe and poach options.  Any other options are passed over
+ * to the filesystem to parse.
+ *
+ * This may be called multiple times for a context.
+ *
+ * Returns 0 on success and a negative error code on failure.  In the event of
+ * failure, supplementary error information may have been set.
+ */
+int vfs_parse_fs_param(struct fs_context *fc, struct fs_parameter *param)
+{
+	int ret;
+
+	if (!param->key)
+		return invalf(fc, "Unnamed parameter\n");
+
+	ret = vfs_parse_sb_flag(fc, param->key);
+	if (ret != -ENOPARAM)
+		return ret;
+
+	ret = security_fs_context_parse_param(fc, param);
+	if (ret != -ENOPARAM)
+		/* Param belongs to the LSM or is disallowed by the LSM; so
+		 * don't pass to the FS.
+		 */
+		return ret;
+
+	if (fc->ops->parse_param) {
+		ret = fc->ops->parse_param(fc, param);
+		if (ret != -ENOPARAM)
+			return ret;
+	}
+
+	/* If the filesystem doesn't take any arguments, give it the
+	 * default handling of source.
+	 */
+	if (strcmp(param->key, "source") == 0) {
+		if (param->type != fs_value_is_string)
+			return invalf(fc, "VFS: Non-string source");
+		if (fc->source)
+			return invalf(fc, "VFS: Multiple sources");
+		fc->source = param->string;
+		param->string = NULL;
+		return 0;
+	}
+
+	return invalf(fc, "%s: Unknown parameter '%s'",
+		      fc->fs_type->name, param->key);
+}
+EXPORT_SYMBOL(vfs_parse_fs_param);
+
+/**
+ * vfs_parse_fs_string - Convenience function to just parse a string.
+ */
+int vfs_parse_fs_string(struct fs_context *fc, const char *key,
+			const char *value, size_t v_size)
+{
+	int ret;
+
+	struct fs_parameter param = {
+		.key	= key,
+		.type	= fs_value_is_string,
+		.size	= v_size,
+	};
+
+	if (v_size > 0) {
+		param.string = kmemdup_nul(value, v_size, GFP_KERNEL);
+		if (!param.string)
+			return -ENOMEM;
+	}
+
+	ret = vfs_parse_fs_param(fc, &param);
+	kfree(param.string);
+	return ret;
+}
+EXPORT_SYMBOL(vfs_parse_fs_string);
+
+/**
+ * generic_parse_monolithic - Parse key[=val][,key[=val]]* mount data
+ * @ctx: The superblock configuration to fill in.
+ * @data: The data to parse
+ *
+ * Parse a blob of data that's in key[=val][,key[=val]]* form.  This can be
+ * called from the ->monolithic_mount_data() fs_context operation.
+ *
+ * Returns 0 on success or the error returned by the ->parse_option() fs_context
+ * operation on failure.
+ */
+int generic_parse_monolithic(struct fs_context *fc, void *data)
+{
+	char *options = data, *key;
+	int ret = 0;
+
+	if (!options)
+		return 0;
+
+	ret = security_sb_eat_lsm_opts(options, &fc->security);
+	if (ret)
+		return ret;
+
+	while ((key = strsep(&options, ",")) != NULL) {
+		if (*key) {
+			size_t v_len = 0;
+			char *value = strchr(key, '=');
+
+			if (value) {
+				if (value == key)
+					continue;
+				*value++ = 0;
+				v_len = strlen(value);
+			}
+			ret = vfs_parse_fs_string(fc, key, value, v_len);
+			if (ret < 0)
+				break;
+		}
+	}
+
+	return ret;
+}
+EXPORT_SYMBOL(generic_parse_monolithic);
+
+/**
+ * alloc_fs_context - Create a filesystem context.
+ * @fs_type: The filesystem type.
+ * @reference: The dentry from which this one derives (or NULL)
+ * @sb_flags: Filesystem/superblock flags (SB_*)
+ * @sb_flags_mask: Applicable members of @sb_flags
+ * @purpose: The purpose that this configuration shall be used for.
+ *
+ * Open a filesystem and create a mount context.  The mount context is
+ * initialised with the supplied flags and, if a submount/automount from
+ * another superblock (referred to by @reference) is supplied, may have
+ * parameters such as namespaces copied across from that superblock.
+ */
+static struct fs_context *alloc_fs_context(struct file_system_type *fs_type,
+				      struct dentry *reference,
+				      unsigned int sb_flags,
+				      unsigned int sb_flags_mask,
+				      enum fs_context_purpose purpose)
+{
+	int (*init_fs_context)(struct fs_context *);
+	struct fs_context *fc;
+	int ret = -ENOMEM;
+
+	fc = kzalloc(sizeof(struct fs_context), GFP_KERNEL);
+	if (!fc)
+		return ERR_PTR(-ENOMEM);
+
+	fc->purpose	= purpose;
+	fc->sb_flags	= sb_flags;
+	fc->sb_flags_mask = sb_flags_mask;
+	fc->fs_type	= get_filesystem(fs_type);
+	fc->cred	= get_current_cred();
+	fc->net_ns	= get_net(current->nsproxy->net_ns);
+
+	mutex_init(&fc->uapi_mutex);
+
+	switch (purpose) {
+	case FS_CONTEXT_FOR_MOUNT:
+		fc->user_ns = get_user_ns(fc->cred->user_ns);
+		break;
+	case FS_CONTEXT_FOR_SUBMOUNT:
+		fc->user_ns = get_user_ns(reference->d_sb->s_user_ns);
+		break;
+	case FS_CONTEXT_FOR_RECONFIGURE:
+		/* We don't pin any namespaces as the superblock's
+		 * subscriptions cannot be changed at this point.
+		 */
+		atomic_inc(&reference->d_sb->s_active);
+		fc->root = dget(reference);
+		break;
+	}
+
+	/* TODO: Make all filesystems support this unconditionally */
+	init_fs_context = fc->fs_type->init_fs_context;
+	if (!init_fs_context)
+		init_fs_context = legacy_init_fs_context;
+
+	ret = init_fs_context(fc);
+	if (ret < 0)
+		goto err_fc;
+	fc->need_free = true;
+	return fc;
+
+err_fc:
+	put_fs_context(fc);
+	return ERR_PTR(ret);
+}
+
+struct fs_context *fs_context_for_mount(struct file_system_type *fs_type,
+					unsigned int sb_flags)
+{
+	return alloc_fs_context(fs_type, NULL, sb_flags, 0,
+					FS_CONTEXT_FOR_MOUNT);
+}
+EXPORT_SYMBOL(fs_context_for_mount);
+
+struct fs_context *fs_context_for_reconfigure(struct dentry *dentry,
+					unsigned int sb_flags,
+					unsigned int sb_flags_mask)
+{
+	return alloc_fs_context(dentry->d_sb->s_type, dentry, sb_flags,
+				sb_flags_mask, FS_CONTEXT_FOR_RECONFIGURE);
+}
+EXPORT_SYMBOL(fs_context_for_reconfigure);
+
+struct fs_context *fs_context_for_submount(struct file_system_type *type,
+					   struct dentry *reference)
+{
+	return alloc_fs_context(type, reference, 0, 0, FS_CONTEXT_FOR_SUBMOUNT);
+}
+EXPORT_SYMBOL(fs_context_for_submount);
+
+void fc_drop_locked(struct fs_context *fc)
+{
+	struct super_block *sb = fc->root->d_sb;
+	dput(fc->root);
+	fc->root = NULL;
+	deactivate_locked_super(sb);
+}
+
+static void legacy_fs_context_free(struct fs_context *fc);
+
+/**
+ * vfs_dup_fc_config: Duplicate a filesystem context.
+ * @src_fc: The context to copy.
+ */
+struct fs_context *vfs_dup_fs_context(struct fs_context *src_fc)
+{
+	struct fs_context *fc;
+	int ret;
+
+	if (!src_fc->ops->dup)
+		return ERR_PTR(-EOPNOTSUPP);
+
+	fc = kmemdup(src_fc, sizeof(struct fs_context), GFP_KERNEL);
+	if (!fc)
+		return ERR_PTR(-ENOMEM);
+
+	mutex_init(&fc->uapi_mutex);
+
+	fc->fs_private	= NULL;
+	fc->s_fs_info	= NULL;
+	fc->source	= NULL;
+	fc->security	= NULL;
+	get_filesystem(fc->fs_type);
+	get_net(fc->net_ns);
+	get_user_ns(fc->user_ns);
+	get_cred(fc->cred);
+	if (fc->log)
+		refcount_inc(&fc->log->usage);
+
+	/* Can't call put until we've called ->dup */
+	ret = fc->ops->dup(fc, src_fc);
+	if (ret < 0)
+		goto err_fc;
+
+	ret = security_fs_context_dup(fc, src_fc);
+	if (ret < 0)
+		goto err_fc;
+	return fc;
+
+err_fc:
+	put_fs_context(fc);
+	return ERR_PTR(ret);
+}
+EXPORT_SYMBOL(vfs_dup_fs_context);
+
+/**
+ * logfc - Log a message to a filesystem context
+ * @fc: The filesystem context to log to.
+ * @fmt: The format of the buffer.
+ */
+void logfc(struct fs_context *fc, const char *fmt, ...)
+{
+	static const char store_failure[] = "OOM: Can't store error string";
+	struct fc_log *log = fc ? fc->log : NULL;
+	const char *p;
+	va_list va;
+	char *q;
+	u8 freeable;
+
+	va_start(va, fmt);
+	if (!strchr(fmt, '%')) {
+		p = fmt;
+		goto unformatted_string;
+	}
+	if (strcmp(fmt, "%s") == 0) {
+		p = va_arg(va, const char *);
+		goto unformatted_string;
+	}
+
+	q = kvasprintf(GFP_KERNEL, fmt, va);
+copied_string:
+	if (!q)
+		goto store_failure;
+	freeable = 1;
+	goto store_string;
+
+unformatted_string:
+	if ((unsigned long)p >= (unsigned long)__start_rodata &&
+	    (unsigned long)p <  (unsigned long)__end_rodata)
+		goto const_string;
+	if (log && within_module_core((unsigned long)p, log->owner))
+		goto const_string;
+	q = kstrdup(p, GFP_KERNEL);
+	goto copied_string;
+
+store_failure:
+	p = store_failure;
+const_string:
+	q = (char *)p;
+	freeable = 0;
+store_string:
+	if (!log) {
+		switch (fmt[0]) {
+		case 'w':
+			printk(KERN_WARNING "%s\n", q + 2);
+			break;
+		case 'e':
+			printk(KERN_ERR "%s\n", q + 2);
+			break;
+		default:
+			printk(KERN_NOTICE "%s\n", q + 2);
+			break;
+		}
+		if (freeable)
+			kfree(q);
+	} else {
+		unsigned int logsize = ARRAY_SIZE(log->buffer);
+		u8 index;
+
+		index = log->head & (logsize - 1);
+		BUILD_BUG_ON(sizeof(log->head) != sizeof(u8) ||
+			     sizeof(log->tail) != sizeof(u8));
+		if ((u8)(log->head - log->tail) == logsize) {
+			/* The buffer is full, discard the oldest message */
+			if (log->need_free & (1 << index))
+				kfree(log->buffer[index]);
+			log->tail++;
+		}
+
+		log->buffer[index] = q;
+		log->need_free &= ~(1 << index);
+		log->need_free |= freeable << index;
+		log->head++;
+	}
+	va_end(va);
+}
+EXPORT_SYMBOL(logfc);
+
+/*
+ * Free a logging structure.
+ */
+static void put_fc_log(struct fs_context *fc)
+{
+	struct fc_log *log = fc->log;
+	int i;
+
+	if (log) {
+		if (refcount_dec_and_test(&log->usage)) {
+			fc->log = NULL;
+			for (i = 0; i <= 7; i++)
+				if (log->need_free & (1 << i))
+					kfree(log->buffer[i]);
+			kfree(log);
+		}
+	}
+}
+
+/**
+ * put_fs_context - Dispose of a superblock configuration context.
+ * @fc: The context to dispose of.
+ */
+void put_fs_context(struct fs_context *fc)
+{
+	struct super_block *sb;
+
+	if (fc->root) {
+		sb = fc->root->d_sb;
+		dput(fc->root);
+		fc->root = NULL;
+		deactivate_super(sb);
+	}
+
+	if (fc->need_free && fc->ops && fc->ops->free)
+		fc->ops->free(fc);
+
+	security_free_mnt_opts(&fc->security);
+	put_net(fc->net_ns);
+	put_user_ns(fc->user_ns);
+	put_cred(fc->cred);
+	kfree(fc->subtype);
+	put_fc_log(fc);
+	put_filesystem(fc->fs_type);
+	kfree(fc->source);
+	kfree(fc);
+}
+EXPORT_SYMBOL(put_fs_context);
+
+/*
+ * Free the config for a filesystem that doesn't support fs_context.
+ */
+static void legacy_fs_context_free(struct fs_context *fc)
+{
+	struct legacy_fs_context *ctx = fc->fs_private;
+
+	if (ctx) {
+		if (ctx->param_type == LEGACY_FS_INDIVIDUAL_PARAMS)
+			kfree(ctx->legacy_data);
+		kfree(ctx);
+	}
+}
+
+/*
+ * Duplicate a legacy config.
+ */
+static int legacy_fs_context_dup(struct fs_context *fc, struct fs_context *src_fc)
+{
+	struct legacy_fs_context *ctx;
+	struct legacy_fs_context *src_ctx = src_fc->fs_private;
+
+	ctx = kmemdup(src_ctx, sizeof(*src_ctx), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	if (ctx->param_type == LEGACY_FS_INDIVIDUAL_PARAMS) {
+		ctx->legacy_data = kmemdup(src_ctx->legacy_data,
+					   src_ctx->data_size, GFP_KERNEL);
+		if (!ctx->legacy_data) {
+			kfree(ctx);
+			return -ENOMEM;
+		}
+	}
+
+	fc->fs_private = ctx;
+	return 0;
+}
+
+/*
+ * Add a parameter to a legacy config.  We build up a comma-separated list of
+ * options.
+ */
+static int legacy_parse_param(struct fs_context *fc, struct fs_parameter *param)
+{
+	struct legacy_fs_context *ctx = fc->fs_private;
+	unsigned int size = ctx->data_size;
+	size_t len = 0;
+
+	if (strcmp(param->key, "source") == 0) {
+		if (param->type != fs_value_is_string)
+			return invalf(fc, "VFS: Legacy: Non-string source");
+		if (fc->source)
+			return invalf(fc, "VFS: Legacy: Multiple sources");
+		fc->source = param->string;
+		param->string = NULL;
+		return 0;
+	}
+
+	if ((fc->fs_type->fs_flags & FS_HAS_SUBTYPE) &&
+	    strcmp(param->key, "subtype") == 0) {
+		if (param->type != fs_value_is_string)
+			return invalf(fc, "VFS: Legacy: Non-string subtype");
+		if (fc->subtype)
+			return invalf(fc, "VFS: Legacy: Multiple subtype");
+		fc->subtype = param->string;
+		param->string = NULL;
+		return 0;
+	}
+
+	if (ctx->param_type == LEGACY_FS_MONOLITHIC_PARAMS)
+		return invalf(fc, "VFS: Legacy: Can't mix monolithic and individual options");
+
+	switch (param->type) {
+	case fs_value_is_string:
+		len = 1 + param->size;
+		/* Fall through */
+	case fs_value_is_flag:
+		len += strlen(param->key);
+		break;
+	default:
+		return invalf(fc, "VFS: Legacy: Parameter type for '%s' not supported",
+			      param->key);
+	}
+
+	if (len > PAGE_SIZE - 2 - size)
+		return invalf(fc, "VFS: Legacy: Cumulative options too large");
+	if (strchr(param->key, ',') ||
+	    (param->type == fs_value_is_string &&
+	     memchr(param->string, ',', param->size)))
+		return invalf(fc, "VFS: Legacy: Option '%s' contained comma",
+			      param->key);
+	if (!ctx->legacy_data) {
+		ctx->legacy_data = kmalloc(PAGE_SIZE, GFP_KERNEL);
+		if (!ctx->legacy_data)
+			return -ENOMEM;
+	}
+
+	ctx->legacy_data[size++] = ',';
+	len = strlen(param->key);
+	memcpy(ctx->legacy_data + size, param->key, len);
+	size += len;
+	if (param->type == fs_value_is_string) {
+		ctx->legacy_data[size++] = '=';
+		memcpy(ctx->legacy_data + size, param->string, param->size);
+		size += param->size;
+	}
+	ctx->legacy_data[size] = '\0';
+	ctx->data_size = size;
+	ctx->param_type = LEGACY_FS_INDIVIDUAL_PARAMS;
+	return 0;
+}
+
+/*
+ * Add monolithic mount data.
+ */
+static int legacy_parse_monolithic(struct fs_context *fc, void *data)
+{
+	struct legacy_fs_context *ctx = fc->fs_private;
+
+	if (ctx->param_type != LEGACY_FS_UNSET_PARAMS) {
+		pr_warn("VFS: Can't mix monolithic and individual options\n");
+		return -EINVAL;
+	}
+
+	ctx->legacy_data = data;
+	ctx->param_type = LEGACY_FS_MONOLITHIC_PARAMS;
+	if (!ctx->legacy_data)
+		return 0;
+
+	if (fc->fs_type->fs_flags & FS_BINARY_MOUNTDATA)
+		return 0;
+	return security_sb_eat_lsm_opts(ctx->legacy_data, &fc->security);
+}
+
+/*
+ * Get a mountable root with the legacy mount command.
+ */
+static int legacy_get_tree(struct fs_context *fc)
+{
+	struct legacy_fs_context *ctx = fc->fs_private;
+	struct super_block *sb;
+	struct dentry *root;
+
+	root = fc->fs_type->mount(fc->fs_type, fc->sb_flags,
+				      fc->source, ctx->legacy_data);
+	if (IS_ERR(root))
+		return PTR_ERR(root);
+
+	sb = root->d_sb;
+	BUG_ON(!sb);
+
+	fc->root = root;
+	return 0;
+}
+
+/*
+ * Handle remount.
+ */
+static int legacy_reconfigure(struct fs_context *fc)
+{
+	struct legacy_fs_context *ctx = fc->fs_private;
+	struct super_block *sb = fc->root->d_sb;
+
+	if (!sb->s_op->remount_fs)
+		return 0;
+
+	return sb->s_op->remount_fs(sb, &fc->sb_flags,
+				    ctx ? ctx->legacy_data : NULL);
+}
+
+const struct fs_context_operations legacy_fs_context_ops = {
+	.free			= legacy_fs_context_free,
+	.dup			= legacy_fs_context_dup,
+	.parse_param		= legacy_parse_param,
+	.parse_monolithic	= legacy_parse_monolithic,
+	.get_tree		= legacy_get_tree,
+	.reconfigure		= legacy_reconfigure,
+};
+
+/*
+ * Initialise a legacy context for a filesystem that doesn't support
+ * fs_context.
+ */
+static int legacy_init_fs_context(struct fs_context *fc)
+{
+	fc->fs_private = kzalloc(sizeof(struct legacy_fs_context), GFP_KERNEL);
+	if (!fc->fs_private)
+		return -ENOMEM;
+	fc->ops = &legacy_fs_context_ops;
+	return 0;
+}
+
+int parse_monolithic_mount_data(struct fs_context *fc, void *data)
+{
+	int (*monolithic_mount_data)(struct fs_context *, void *);
+
+	monolithic_mount_data = fc->ops->parse_monolithic;
+	if (!monolithic_mount_data)
+		monolithic_mount_data = generic_parse_monolithic;
+
+	return monolithic_mount_data(fc, data);
+}
+
+/*
+ * Clean up a context after performing an action on it and put it into a state
+ * from where it can be used to reconfigure a superblock.
+ *
+ * Note that here we do only the parts that can't fail; the rest is in
+ * finish_clean_context() below and in between those fs_context is marked
+ * FS_CONTEXT_AWAITING_RECONF.  The reason for splitup is that after
+ * successful mount or remount we need to report success to userland.
+ * Trying to do full reinit (for the sake of possible subsequent remount)
+ * and failing to allocate memory would've put us into a nasty situation.
+ * So here we only discard the old state and reinitialization is left
+ * until we actually try to reconfigure.
+ */
+void vfs_clean_context(struct fs_context *fc)
+{
+	if (fc->need_free && fc->ops && fc->ops->free)
+		fc->ops->free(fc);
+	fc->need_free = false;
+	fc->fs_private = NULL;
+	fc->s_fs_info = NULL;
+	fc->sb_flags = 0;
+	security_free_mnt_opts(&fc->security);
+	kfree(fc->subtype);
+	fc->subtype = NULL;
+	kfree(fc->source);
+	fc->source = NULL;
+
+	fc->purpose = FS_CONTEXT_FOR_RECONFIGURE;
+	fc->phase = FS_CONTEXT_AWAITING_RECONF;
+}
+
+int finish_clean_context(struct fs_context *fc)
+{
+	int error;
+
+	if (fc->phase != FS_CONTEXT_AWAITING_RECONF)
+		return 0;
+
+	if (fc->fs_type->init_fs_context)
+		error = fc->fs_type->init_fs_context(fc);
+	else
+		error = legacy_init_fs_context(fc);
+	if (unlikely(error)) {
+		fc->phase = FS_CONTEXT_FAILED;
+		return error;
+	}
+	fc->need_free = true;
+	fc->phase = FS_CONTEXT_RECONF_PARAMS;
+	return 0;
+}
diff --git a/fs/fs_parser.c b/fs/fs_parser.c
new file mode 100644
index 000000000000..0d388faa25d1
--- /dev/null
+++ b/fs/fs_parser.c
@@ -0,0 +1,443 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Filesystem parameter parser.
+ *
+ * Copyright (C) 2018 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ */
+
+#include <linux/export.h>
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
+#include <linux/slab.h>
+#include <linux/security.h>
+#include <linux/namei.h>
+#include "internal.h"
+
+static const struct constant_table bool_names[] = {
+	{ "0",		false },
+	{ "1",		true },
+	{ "false",	false },
+	{ "no",		false },
+	{ "true",	true },
+	{ "yes",	true },
+};
+
+/**
+ * lookup_constant - Look up a constant by name in an ordered table
+ * @tbl: The table of constants to search.
+ * @tbl_size: The size of the table.
+ * @name: The name to look up.
+ * @not_found: The value to return if the name is not found.
+ */
+int __lookup_constant(const struct constant_table *tbl, size_t tbl_size,
+		      const char *name, int not_found)
+{
+	unsigned int i;
+
+	for (i = 0; i < tbl_size; i++)
+		if (strcmp(name, tbl[i].name) == 0)
+			return tbl[i].value;
+
+	return not_found;
+}
+EXPORT_SYMBOL(__lookup_constant);
+
+static const struct fs_parameter_spec *fs_lookup_key(
+	const struct fs_parameter_description *desc,
+	const char *name)
+{
+	const struct fs_parameter_spec *p;
+
+	if (!desc->specs)
+		return NULL;
+
+	for (p = desc->specs; p->name; p++)
+		if (strcmp(p->name, name) == 0)
+			return p;
+
+	return NULL;
+}
+
+/*
+ * fs_parse - Parse a filesystem configuration parameter
+ * @fc: The filesystem context to log errors through.
+ * @desc: The parameter description to use.
+ * @param: The parameter.
+ * @result: Where to place the result of the parse
+ *
+ * Parse a filesystem configuration parameter and attempt a conversion for a
+ * simple parameter for which this is requested.  If successful, the determined
+ * parameter ID is placed into @result->key, the desired type is indicated in
+ * @result->t and any converted value is placed into an appropriate member of
+ * the union in @result.
+ *
+ * The function returns the parameter number if the parameter was matched,
+ * -ENOPARAM if it wasn't matched and @desc->ignore_unknown indicated that
+ * unknown parameters are okay and -EINVAL if there was a conversion issue or
+ * the parameter wasn't recognised and unknowns aren't okay.
+ */
+int fs_parse(struct fs_context *fc,
+	     const struct fs_parameter_description *desc,
+	     struct fs_parameter *param,
+	     struct fs_parse_result *result)
+{
+	const struct fs_parameter_spec *p;
+	const struct fs_parameter_enum *e;
+	int ret = -ENOPARAM, b;
+
+	result->has_value = !!param->string;
+	result->negated = false;
+	result->uint_64 = 0;
+
+	p = fs_lookup_key(desc, param->key);
+	if (!p) {
+		/* If we didn't find something that looks like "noxxx", see if
+		 * "xxx" takes the "no"-form negative - but only if there
+		 * wasn't an value.
+		 */
+		if (result->has_value)
+			goto unknown_parameter;
+		if (param->key[0] != 'n' || param->key[1] != 'o' || !param->key[2])
+			goto unknown_parameter;
+
+		p = fs_lookup_key(desc, param->key + 2);
+		if (!p)
+			goto unknown_parameter;
+		if (!(p->flags & fs_param_neg_with_no))
+			goto unknown_parameter;
+		result->boolean = false;
+		result->negated = true;
+	}
+
+	if (p->flags & fs_param_deprecated)
+		warnf(fc, "%s: Deprecated parameter '%s'",
+		      desc->name, param->key);
+
+	if (result->negated)
+		goto okay;
+
+	/* Certain parameter types only take a string and convert it. */
+	switch (p->type) {
+	case __fs_param_wasnt_defined:
+		return -EINVAL;
+	case fs_param_is_u32:
+	case fs_param_is_u32_octal:
+	case fs_param_is_u32_hex:
+	case fs_param_is_s32:
+	case fs_param_is_u64:
+	case fs_param_is_enum:
+	case fs_param_is_string:
+		if (param->type != fs_value_is_string)
+			goto bad_value;
+		if (!result->has_value) {
+			if (p->flags & fs_param_v_optional)
+				goto okay;
+			goto bad_value;
+		}
+		/* Fall through */
+	default:
+		break;
+	}
+
+	/* Try to turn the type we were given into the type desired by the
+	 * parameter and give an error if we can't.
+	 */
+	switch (p->type) {
+	case fs_param_is_flag:
+		if (param->type != fs_value_is_flag &&
+		    (param->type != fs_value_is_string || result->has_value))
+			return invalf(fc, "%s: Unexpected value for '%s'",
+				      desc->name, param->key);
+		result->boolean = true;
+		goto okay;
+
+	case fs_param_is_bool:
+		switch (param->type) {
+		case fs_value_is_flag:
+			result->boolean = true;
+			goto okay;
+		case fs_value_is_string:
+			if (param->size == 0) {
+				result->boolean = true;
+				goto okay;
+			}
+			b = lookup_constant(bool_names, param->string, -1);
+			if (b == -1)
+				goto bad_value;
+			result->boolean = b;
+			goto okay;
+		default:
+			goto bad_value;
+		}
+
+	case fs_param_is_u32:
+		ret = kstrtouint(param->string, 0, &result->uint_32);
+		goto maybe_okay;
+	case fs_param_is_u32_octal:
+		ret = kstrtouint(param->string, 8, &result->uint_32);
+		goto maybe_okay;
+	case fs_param_is_u32_hex:
+		ret = kstrtouint(param->string, 16, &result->uint_32);
+		goto maybe_okay;
+	case fs_param_is_s32:
+		ret = kstrtoint(param->string, 0, &result->int_32);
+		goto maybe_okay;
+	case fs_param_is_u64:
+		ret = kstrtoull(param->string, 0, &result->uint_64);
+		goto maybe_okay;
+
+	case fs_param_is_enum:
+		for (e = desc->enums; e->name[0]; e++) {
+			if (e->opt == p->opt &&
+			    strcmp(e->name, param->string) == 0) {
+				result->uint_32 = e->value;
+				goto okay;
+			}
+		}
+		goto bad_value;
+
+	case fs_param_is_string:
+		goto okay;
+	case fs_param_is_blob:
+		if (param->type != fs_value_is_blob)
+			goto bad_value;
+		goto okay;
+
+	case fs_param_is_fd: {
+		if (param->type != fs_value_is_file)
+			goto bad_value;
+		goto okay;
+	}
+
+	case fs_param_is_blockdev:
+	case fs_param_is_path:
+		goto okay;
+	default:
+		BUG();
+	}
+
+maybe_okay:
+	if (ret < 0)
+		goto bad_value;
+okay:
+	return p->opt;
+
+bad_value:
+	return invalf(fc, "%s: Bad value for '%s'", desc->name, param->key);
+unknown_parameter:
+	return -ENOPARAM;
+}
+EXPORT_SYMBOL(fs_parse);
+
+/**
+ * fs_lookup_param - Look up a path referred to by a parameter
+ * @fc: The filesystem context to log errors through.
+ * @param: The parameter.
+ * @want_bdev: T if want a blockdev
+ * @_path: The result of the lookup
+ */
+int fs_lookup_param(struct fs_context *fc,
+		    struct fs_parameter *param,
+		    bool want_bdev,
+		    struct path *_path)
+{
+	struct filename *f;
+	unsigned int flags = 0;
+	bool put_f;
+	int ret;
+
+	switch (param->type) {
+	case fs_value_is_string:
+		f = getname_kernel(param->string);
+		if (IS_ERR(f))
+			return PTR_ERR(f);
+		put_f = true;
+		break;
+	case fs_value_is_filename_empty:
+		flags = LOOKUP_EMPTY;
+		/* Fall through */
+	case fs_value_is_filename:
+		f = param->name;
+		put_f = false;
+		break;
+	default:
+		return invalf(fc, "%s: not usable as path", param->key);
+	}
+
+	ret = filename_lookup(param->dirfd, f, flags, _path, NULL);
+	if (ret < 0) {
+		errorf(fc, "%s: Lookup failure for '%s'", param->key, f->name);
+		goto out;
+	}
+
+	if (want_bdev &&
+	    !S_ISBLK(d_backing_inode(_path->dentry)->i_mode)) {
+		path_put(_path);
+		_path->dentry = NULL;
+		_path->mnt = NULL;
+		errorf(fc, "%s: Non-blockdev passed as '%s'",
+		       param->key, f->name);
+		ret = -ENOTBLK;
+	}
+
+out:
+	if (put_f)
+		putname(f);
+	return ret;
+}
+EXPORT_SYMBOL(fs_lookup_param);
+
+#ifdef CONFIG_VALIDATE_FS_PARSER
+/**
+ * validate_constant_table - Validate a constant table
+ * @name: Name to use in reporting
+ * @tbl: The constant table to validate.
+ * @tbl_size: The size of the table.
+ * @low: The lowest permissible value.
+ * @high: The highest permissible value.
+ * @special: One special permissible value outside of the range.
+ */
+bool validate_constant_table(const struct constant_table *tbl, size_t tbl_size,
+			     int low, int high, int special)
+{
+	size_t i;
+	bool good = true;
+
+	if (tbl_size == 0) {
+		pr_warn("VALIDATE C-TBL: Empty\n");
+		return true;
+	}
+
+	for (i = 0; i < tbl_size; i++) {
+		if (!tbl[i].name) {
+			pr_err("VALIDATE C-TBL[%zu]: Null\n", i);
+			good = false;
+		} else if (i > 0 && tbl[i - 1].name) {
+			int c = strcmp(tbl[i-1].name, tbl[i].name);
+
+			if (c == 0) {
+				pr_err("VALIDATE C-TBL[%zu]: Duplicate %s\n",
+				       i, tbl[i].name);
+				good = false;
+			}
+			if (c > 0) {
+				pr_err("VALIDATE C-TBL[%zu]: Missorted %s>=%s\n",
+				       i, tbl[i-1].name, tbl[i].name);
+				good = false;
+			}
+		}
+
+		if (tbl[i].value != special &&
+		    (tbl[i].value < low || tbl[i].value > high)) {
+			pr_err("VALIDATE C-TBL[%zu]: %s->%d const out of range (%d-%d)\n",
+			       i, tbl[i].name, tbl[i].value, low, high);
+			good = false;
+		}
+	}
+
+	return good;
+}
+
+/**
+ * fs_validate_description - Validate a parameter description
+ * @desc: The parameter description to validate.
+ */
+bool fs_validate_description(const struct fs_parameter_description *desc)
+{
+	const struct fs_parameter_spec *param, *p2;
+	const struct fs_parameter_enum *e;
+	const char *name = desc->name;
+	unsigned int nr_params = 0;
+	bool good = true, enums = false;
+
+	pr_notice("*** VALIDATE %s ***\n", name);
+
+	if (!name[0]) {
+		pr_err("VALIDATE Parser: No name\n");
+		name = "Unknown";
+		good = false;
+	}
+
+	if (desc->specs) {
+		for (param = desc->specs; param->name; param++) {
+			enum fs_parameter_type t = param->type;
+
+			/* Check that the type is in range */
+			if (t == __fs_param_wasnt_defined ||
+			    t >= nr__fs_parameter_type) {
+				pr_err("VALIDATE %s: PARAM[%s] Bad type %u\n",
+				       name, param->name, t);
+				good = false;
+			} else if (t == fs_param_is_enum) {
+				enums = true;
+			}
+
+			/* Check for duplicate parameter names */
+			for (p2 = desc->specs; p2 < param; p2++) {
+				if (strcmp(param->name, p2->name) == 0) {
+					pr_err("VALIDATE %s: PARAM[%s]: Duplicate\n",
+					       name, param->name);
+					good = false;
+				}
+			}
+		}
+
+		nr_params = param - desc->specs;
+	}
+
+	if (desc->enums) {
+		if (!nr_params) {
+			pr_err("VALIDATE %s: Enum table but no parameters\n",
+			       name);
+			good = false;
+			goto no_enums;
+		}
+		if (!enums) {
+			pr_err("VALIDATE %s: Enum table but no enum-type values\n",
+			       name);
+			good = false;
+			goto no_enums;
+		}
+
+		for (e = desc->enums; e->name[0]; e++) {
+			/* Check that all entries in the enum table have at
+			 * least one parameter that uses them.
+			 */
+			for (param = desc->specs; param->name; param++) {
+				if (param->opt == e->opt &&
+				    param->type != fs_param_is_enum) {
+					pr_err("VALIDATE %s: e[%tu] enum val for %s\n",
+					       name, e - desc->enums, param->name);
+					good = false;
+				}
+			}
+		}
+
+		/* Check that all enum-type parameters have at least one enum
+		 * value in the enum table.
+		 */
+		for (param = desc->specs; param->name; param++) {
+			if (param->type != fs_param_is_enum)
+				continue;
+			for (e = desc->enums; e->name[0]; e++)
+				if (e->opt == param->opt)
+					break;
+			if (!e->name[0]) {
+				pr_err("VALIDATE %s: PARAM[%s] enum with no values\n",
+				       name, param->name);
+				good = false;
+			}
+		}
+	} else {
+		if (enums) {
+			pr_err("VALIDATE %s: enum-type values, but no enum table\n",
+			       name);
+			good = false;
+			goto no_enums;
+		}
+	}
+
+no_enums:
+	return good;
+}
+#endif /* CONFIG_VALIDATE_FS_PARSER */
diff --git a/fs/fs_struct.c b/fs/fs_struct.c
index be0250788b73..ca639ed967b7 100644
--- a/fs/fs_struct.c
+++ b/fs/fs_struct.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <linux/export.h>
 #include <linux/sched/signal.h>
 #include <linux/sched/task.h>
diff --git a/fs/fs_types.c b/fs/fs_types.c
new file mode 100644
index 000000000000..78365e5dc08c
--- /dev/null
+++ b/fs/fs_types.c
@@ -0,0 +1,105 @@
+// SPDX-License-Identifier: GPL-2.0
+#include <linux/fs.h>
+#include <linux/export.h>
+
+/*
+ * fs on-disk file type to dirent file type conversion
+ */
+static const unsigned char fs_dtype_by_ftype[FT_MAX] = {
+	[FT_UNKNOWN]	= DT_UNKNOWN,
+	[FT_REG_FILE]	= DT_REG,
+	[FT_DIR]	= DT_DIR,
+	[FT_CHRDEV]	= DT_CHR,
+	[FT_BLKDEV]	= DT_BLK,
+	[FT_FIFO]	= DT_FIFO,
+	[FT_SOCK]	= DT_SOCK,
+	[FT_SYMLINK]	= DT_LNK
+};
+
+/**
+ * fs_ftype_to_dtype() - fs on-disk file type to dirent type.
+ * @filetype: The on-disk file type to convert.
+ *
+ * This function converts the on-disk file type value (FT_*) to the directory
+ * entry type (DT_*).
+ *
+ * Context: Any context.
+ * Return:
+ * * DT_UNKNOWN		- Unknown type
+ * * DT_FIFO		- FIFO
+ * * DT_CHR		- Character device
+ * * DT_DIR		- Directory
+ * * DT_BLK		- Block device
+ * * DT_REG		- Regular file
+ * * DT_LNK		- Symbolic link
+ * * DT_SOCK		- Local-domain socket
+ */
+unsigned char fs_ftype_to_dtype(unsigned int filetype)
+{
+	if (filetype >= FT_MAX)
+		return DT_UNKNOWN;
+
+	return fs_dtype_by_ftype[filetype];
+}
+EXPORT_SYMBOL_GPL(fs_ftype_to_dtype);
+
+/*
+ * dirent file type to fs on-disk file type conversion
+ * Values not initialized explicitly are FT_UNKNOWN (0).
+ */
+static const unsigned char fs_ftype_by_dtype[DT_MAX] = {
+	[DT_REG]	= FT_REG_FILE,
+	[DT_DIR]	= FT_DIR,
+	[DT_LNK]	= FT_SYMLINK,
+	[DT_CHR]	= FT_CHRDEV,
+	[DT_BLK]	= FT_BLKDEV,
+	[DT_FIFO]	= FT_FIFO,
+	[DT_SOCK]	= FT_SOCK,
+};
+
+/**
+ * fs_umode_to_ftype() - file mode to on-disk file type.
+ * @mode: The file mode to convert.
+ *
+ * This function converts the file mode value to the on-disk file type (FT_*).
+ *
+ * Context: Any context.
+ * Return:
+ * * FT_UNKNOWN		- Unknown type
+ * * FT_REG_FILE	- Regular file
+ * * FT_DIR		- Directory
+ * * FT_CHRDEV		- Character device
+ * * FT_BLKDEV		- Block device
+ * * FT_FIFO		- FIFO
+ * * FT_SOCK		- Local-domain socket
+ * * FT_SYMLINK		- Symbolic link
+ */
+unsigned char fs_umode_to_ftype(umode_t mode)
+{
+	return fs_ftype_by_dtype[S_DT(mode)];
+}
+EXPORT_SYMBOL_GPL(fs_umode_to_ftype);
+
+/**
+ * fs_umode_to_dtype() - file mode to dirent file type.
+ * @mode: The file mode to convert.
+ *
+ * This function converts the file mode value to the directory
+ * entry type (DT_*).
+ *
+ * Context: Any context.
+ * Return:
+ * * DT_UNKNOWN		- Unknown type
+ * * DT_FIFO		- FIFO
+ * * DT_CHR		- Character device
+ * * DT_DIR		- Directory
+ * * DT_BLK		- Block device
+ * * DT_REG		- Regular file
+ * * DT_LNK		- Symbolic link
+ * * DT_SOCK		- Local-domain socket
+ */
+unsigned char fs_umode_to_dtype(umode_t mode)
+{
+	return fs_ftype_to_dtype(fs_umode_to_ftype(mode));
+}
+EXPORT_SYMBOL_GPL(fs_umode_to_dtype);
diff --git a/fs/fscache/Kconfig b/fs/fscache/Kconfig
index 3f6dfa989881..506c5e643f0d 100644
--- a/fs/fscache/Kconfig
+++ b/fs/fscache/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 
 config FSCACHE
 	tristate "General filesystem local caching manager"
diff --git a/fs/fscache/cache.c b/fs/fscache/cache.c
index cdcb376ef8df..f78793f3d21e 100644
--- a/fs/fscache/cache.c
+++ b/fs/fscache/cache.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* FS-Cache cache handling
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #define FSCACHE_DEBUG_LEVEL CACHE
diff --git a/fs/fscache/cookie.c b/fs/fscache/cookie.c
index c550512ce335..0ce39658a620 100644
--- a/fs/fscache/cookie.c
+++ b/fs/fscache/cookie.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* netfs cookie management
  *
  * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
  * See Documentation/filesystems/caching/netfs-api.txt for more information on
  * the netfs API.
  */
diff --git a/fs/fscache/fsdef.c b/fs/fscache/fsdef.c
index aa46e48d8c75..09ed8795ad86 100644
--- a/fs/fscache/fsdef.c
+++ b/fs/fscache/fsdef.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Filesystem index definition
  *
  * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #define FSCACHE_DEBUG_LEVEL CACHE
diff --git a/fs/fscache/histogram.c b/fs/fscache/histogram.c
index 9a13e9e15b69..4e5beeaaf454 100644
--- a/fs/fscache/histogram.c
+++ b/fs/fscache/histogram.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* FS-Cache latency histogram
  *
  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #define FSCACHE_DEBUG_LEVEL THREAD
diff --git a/fs/fscache/internal.h b/fs/fscache/internal.h
index d6209022e965..9616af3768e1 100644
--- a/fs/fscache/internal.h
+++ b/fs/fscache/internal.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* Internal definitions for FS-Cache
  *
  * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 /*
diff --git a/fs/fscache/main.c b/fs/fscache/main.c
index 30ad89db1efc..59c2494efda3 100644
--- a/fs/fscache/main.c
+++ b/fs/fscache/main.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* General filesystem local caching manager
  *
  * Copyright (C) 2004-2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #define FSCACHE_DEBUG_LEVEL CACHE
diff --git a/fs/fscache/netfs.c b/fs/fscache/netfs.c
index c2f605483cc5..cce92216fa28 100644
--- a/fs/fscache/netfs.c
+++ b/fs/fscache/netfs.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* FS-Cache netfs (client) registration
  *
  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #define FSCACHE_DEBUG_LEVEL COOKIE
diff --git a/fs/fscache/object-list.c b/fs/fscache/object-list.c
index 43e6e28c164f..72ebfe578f40 100644
--- a/fs/fscache/object-list.c
+++ b/fs/fscache/object-list.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Global fscache object list maintainer and viewer
  *
  * Copyright (C) 2009 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #define FSCACHE_DEBUG_LEVEL COOKIE
diff --git a/fs/fscache/object.c b/fs/fscache/object.c
index 6d9cb1719de5..cfeba839a0f2 100644
--- a/fs/fscache/object.c
+++ b/fs/fscache/object.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* FS-Cache object state machine handler
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
  * See Documentation/filesystems/caching/object.txt for a description of the
  * object state machine and the in-kernel representations.
  */
diff --git a/fs/fscache/operation.c b/fs/fscache/operation.c
index 8d265790374c..1a22a55f75a0 100644
--- a/fs/fscache/operation.c
+++ b/fs/fscache/operation.c
@@ -1,13 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* FS-Cache worker operation management routines
  *
  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
- *
  * See Documentation/filesystems/caching/operations.txt
  */
 
diff --git a/fs/fscache/page.c b/fs/fscache/page.c
index 111349f67d98..26af6fdf1538 100644
--- a/fs/fscache/page.c
+++ b/fs/fscache/page.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* Cache page management and data I/O routines
  *
  * Copyright (C) 2004-2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #define FSCACHE_DEBUG_LEVEL PAGE
diff --git a/fs/fscache/proc.c b/fs/fscache/proc.c
index 49a8c90414bc..5523446e2952 100644
--- a/fs/fscache/proc.c
+++ b/fs/fscache/proc.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* FS-Cache statistics viewing interface
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #define FSCACHE_DEBUG_LEVEL OPERATION
diff --git a/fs/fscache/stats.c b/fs/fscache/stats.c
index 00564a1dfd76..a5aa93ece8c5 100644
--- a/fs/fscache/stats.c
+++ b/fs/fscache/stats.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* FS-Cache statistics
  *
  * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #define FSCACHE_DEBUG_LEVEL THREAD
diff --git a/fs/fsopen.c b/fs/fsopen.c
new file mode 100644
index 000000000000..a8bf83ce8d4e
--- /dev/null
+++ b/fs/fsopen.c
@@ -0,0 +1,473 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/* Filesystem access-by-fd.
+ *
+ * Copyright (C) 2017 Red Hat, Inc. All Rights Reserved.
+ * Written by David Howells (dhowells@redhat.com)
+ */
+
+#include <linux/fs_context.h>
+#include <linux/fs_parser.h>
+#include <linux/slab.h>
+#include <linux/uaccess.h>
+#include <linux/syscalls.h>
+#include <linux/security.h>
+#include <linux/anon_inodes.h>
+#include <linux/namei.h>
+#include <linux/file.h>
+#include <uapi/linux/mount.h>
+#include "internal.h"
+#include "mount.h"
+
+/*
+ * Allow the user to read back any error, warning or informational messages.
+ */
+static ssize_t fscontext_read(struct file *file,
+			      char __user *_buf, size_t len, loff_t *pos)
+{
+	struct fs_context *fc = file->private_data;
+	struct fc_log *log = fc->log;
+	unsigned int logsize = ARRAY_SIZE(log->buffer);
+	ssize_t ret;
+	char *p;
+	bool need_free;
+	int index, n;
+
+	ret = mutex_lock_interruptible(&fc->uapi_mutex);
+	if (ret < 0)
+		return ret;
+
+	if (log->head == log->tail) {
+		mutex_unlock(&fc->uapi_mutex);
+		return -ENODATA;
+	}
+
+	index = log->tail & (logsize - 1);
+	p = log->buffer[index];
+	need_free = log->need_free & (1 << index);
+	log->buffer[index] = NULL;
+	log->need_free &= ~(1 << index);
+	log->tail++;
+	mutex_unlock(&fc->uapi_mutex);
+
+	ret = -EMSGSIZE;
+	n = strlen(p);
+	if (n > len)
+		goto err_free;
+	ret = -EFAULT;
+	if (copy_to_user(_buf, p, n) != 0)
+		goto err_free;
+	ret = n;
+
+err_free:
+	if (need_free)
+		kfree(p);
+	return ret;
+}
+
+static int fscontext_release(struct inode *inode, struct file *file)
+{
+	struct fs_context *fc = file->private_data;
+
+	if (fc) {
+		file->private_data = NULL;
+		put_fs_context(fc);
+	}
+	return 0;
+}
+
+const struct file_operations fscontext_fops = {
+	.read		= fscontext_read,
+	.release	= fscontext_release,
+	.llseek		= no_llseek,
+};
+
+/*
+ * Attach a filesystem context to a file and an fd.
+ */
+static int fscontext_create_fd(struct fs_context *fc, unsigned int o_flags)
+{
+	int fd;
+
+	fd = anon_inode_getfd("[fscontext]", &fscontext_fops, fc,
+			      O_RDWR | o_flags);
+	if (fd < 0)
+		put_fs_context(fc);
+	return fd;
+}
+
+static int fscontext_alloc_log(struct fs_context *fc)
+{
+	fc->log = kzalloc(sizeof(*fc->log), GFP_KERNEL);
+	if (!fc->log)
+		return -ENOMEM;
+	refcount_set(&fc->log->usage, 1);
+	fc->log->owner = fc->fs_type->owner;
+	return 0;
+}
+
+/*
+ * Open a filesystem by name so that it can be configured for mounting.
+ *
+ * We are allowed to specify a container in which the filesystem will be
+ * opened, thereby indicating which namespaces will be used (notably, which
+ * network namespace will be used for network filesystems).
+ */
+SYSCALL_DEFINE2(fsopen, const char __user *, _fs_name, unsigned int, flags)
+{
+	struct file_system_type *fs_type;
+	struct fs_context *fc;
+	const char *fs_name;
+	int ret;
+
+	if (!ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (flags & ~FSOPEN_CLOEXEC)
+		return -EINVAL;
+
+	fs_name = strndup_user(_fs_name, PAGE_SIZE);
+	if (IS_ERR(fs_name))
+		return PTR_ERR(fs_name);
+
+	fs_type = get_fs_type(fs_name);
+	kfree(fs_name);
+	if (!fs_type)
+		return -ENODEV;
+
+	fc = fs_context_for_mount(fs_type, 0);
+	put_filesystem(fs_type);
+	if (IS_ERR(fc))
+		return PTR_ERR(fc);
+
+	fc->phase = FS_CONTEXT_CREATE_PARAMS;
+
+	ret = fscontext_alloc_log(fc);
+	if (ret < 0)
+		goto err_fc;
+
+	return fscontext_create_fd(fc, flags & FSOPEN_CLOEXEC ? O_CLOEXEC : 0);
+
+err_fc:
+	put_fs_context(fc);
+	return ret;
+}
+
+/*
+ * Pick a superblock into a context for reconfiguration.
+ */
+SYSCALL_DEFINE3(fspick, int, dfd, const char __user *, path, unsigned int, flags)
+{
+	struct fs_context *fc;
+	struct path target;
+	unsigned int lookup_flags;
+	int ret;
+
+	if (!ns_capable(current->nsproxy->mnt_ns->user_ns, CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if ((flags & ~(FSPICK_CLOEXEC |
+		       FSPICK_SYMLINK_NOFOLLOW |
+		       FSPICK_NO_AUTOMOUNT |
+		       FSPICK_EMPTY_PATH)) != 0)
+		return -EINVAL;
+
+	lookup_flags = LOOKUP_FOLLOW | LOOKUP_AUTOMOUNT;
+	if (flags & FSPICK_SYMLINK_NOFOLLOW)
+		lookup_flags &= ~LOOKUP_FOLLOW;
+	if (flags & FSPICK_NO_AUTOMOUNT)
+		lookup_flags &= ~LOOKUP_AUTOMOUNT;
+	if (flags & FSPICK_EMPTY_PATH)
+		lookup_flags |= LOOKUP_EMPTY;
+	ret = user_path_at(dfd, path, lookup_flags, &target);
+	if (ret < 0)
+		goto err;
+
+	ret = -EINVAL;
+	if (target.mnt->mnt_root != target.dentry)
+		goto err_path;
+
+	fc = fs_context_for_reconfigure(target.dentry, 0, 0);
+	if (IS_ERR(fc)) {
+		ret = PTR_ERR(fc);
+		goto err_path;
+	}
+
+	fc->phase = FS_CONTEXT_RECONF_PARAMS;
+
+	ret = fscontext_alloc_log(fc);
+	if (ret < 0)
+		goto err_fc;
+
+	path_put(&target);
+	return fscontext_create_fd(fc, flags & FSPICK_CLOEXEC ? O_CLOEXEC : 0);
+
+err_fc:
+	put_fs_context(fc);
+err_path:
+	path_put(&target);
+err:
+	return ret;
+}
+
+/*
+ * Check the state and apply the configuration.  Note that this function is
+ * allowed to 'steal' the value by setting param->xxx to NULL before returning.
+ */
+static int vfs_fsconfig_locked(struct fs_context *fc, int cmd,
+			       struct fs_parameter *param)
+{
+	struct super_block *sb;
+	int ret;
+
+	ret = finish_clean_context(fc);
+	if (ret)
+		return ret;
+	switch (cmd) {
+	case FSCONFIG_CMD_CREATE:
+		if (fc->phase != FS_CONTEXT_CREATE_PARAMS)
+			return -EBUSY;
+		fc->phase = FS_CONTEXT_CREATING;
+		ret = vfs_get_tree(fc);
+		if (ret)
+			break;
+		sb = fc->root->d_sb;
+		ret = security_sb_kern_mount(sb);
+		if (unlikely(ret)) {
+			fc_drop_locked(fc);
+			break;
+		}
+		up_write(&sb->s_umount);
+		fc->phase = FS_CONTEXT_AWAITING_MOUNT;
+		return 0;
+	case FSCONFIG_CMD_RECONFIGURE:
+		if (fc->phase != FS_CONTEXT_RECONF_PARAMS)
+			return -EBUSY;
+		fc->phase = FS_CONTEXT_RECONFIGURING;
+		sb = fc->root->d_sb;
+		if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN)) {
+			ret = -EPERM;
+			break;
+		}
+		down_write(&sb->s_umount);
+		ret = reconfigure_super(fc);
+		up_write(&sb->s_umount);
+		if (ret)
+			break;
+		vfs_clean_context(fc);
+		return 0;
+	default:
+		if (fc->phase != FS_CONTEXT_CREATE_PARAMS &&
+		    fc->phase != FS_CONTEXT_RECONF_PARAMS)
+			return -EBUSY;
+
+		return vfs_parse_fs_param(fc, param);
+	}
+	fc->phase = FS_CONTEXT_FAILED;
+	return ret;
+}
+
+/**
+ * sys_fsconfig - Set parameters and trigger actions on a context
+ * @fd: The filesystem context to act upon
+ * @cmd: The action to take
+ * @_key: Where appropriate, the parameter key to set
+ * @_value: Where appropriate, the parameter value to set
+ * @aux: Additional information for the value
+ *
+ * This system call is used to set parameters on a context, including
+ * superblock settings, data source and security labelling.
+ *
+ * Actions include triggering the creation of a superblock and the
+ * reconfiguration of the superblock attached to the specified context.
+ *
+ * When setting a parameter, @cmd indicates the type of value being proposed
+ * and @_key indicates the parameter to be altered.
+ *
+ * @_value and @aux are used to specify the value, should a value be required:
+ *
+ * (*) fsconfig_set_flag: No value is specified.  The parameter must be boolean
+ *     in nature.  The key may be prefixed with "no" to invert the
+ *     setting. @_value must be NULL and @aux must be 0.
+ *
+ * (*) fsconfig_set_string: A string value is specified.  The parameter can be
+ *     expecting boolean, integer, string or take a path.  A conversion to an
+ *     appropriate type will be attempted (which may include looking up as a
+ *     path).  @_value points to a NUL-terminated string and @aux must be 0.
+ *
+ * (*) fsconfig_set_binary: A binary blob is specified.  @_value points to the
+ *     blob and @aux indicates its size.  The parameter must be expecting a
+ *     blob.
+ *
+ * (*) fsconfig_set_path: A non-empty path is specified.  The parameter must be
+ *     expecting a path object.  @_value points to a NUL-terminated string that
+ *     is the path and @aux is a file descriptor at which to start a relative
+ *     lookup or AT_FDCWD.
+ *
+ * (*) fsconfig_set_path_empty: As fsconfig_set_path, but with AT_EMPTY_PATH
+ *     implied.
+ *
+ * (*) fsconfig_set_fd: An open file descriptor is specified.  @_value must be
+ *     NULL and @aux indicates the file descriptor.
+ */
+SYSCALL_DEFINE5(fsconfig,
+		int, fd,
+		unsigned int, cmd,
+		const char __user *, _key,
+		const void __user *, _value,
+		int, aux)
+{
+	struct fs_context *fc;
+	struct fd f;
+	int ret;
+
+	struct fs_parameter param = {
+		.type	= fs_value_is_undefined,
+	};
+
+	if (fd < 0)
+		return -EINVAL;
+
+	switch (cmd) {
+	case FSCONFIG_SET_FLAG:
+		if (!_key || _value || aux)
+			return -EINVAL;
+		break;
+	case FSCONFIG_SET_STRING:
+		if (!_key || !_value || aux)
+			return -EINVAL;
+		break;
+	case FSCONFIG_SET_BINARY:
+		if (!_key || !_value || aux <= 0 || aux > 1024 * 1024)
+			return -EINVAL;
+		break;
+	case FSCONFIG_SET_PATH:
+	case FSCONFIG_SET_PATH_EMPTY:
+		if (!_key || !_value || (aux != AT_FDCWD && aux < 0))
+			return -EINVAL;
+		break;
+	case FSCONFIG_SET_FD:
+		if (!_key || _value || aux < 0)
+			return -EINVAL;
+		break;
+	case FSCONFIG_CMD_CREATE:
+	case FSCONFIG_CMD_RECONFIGURE:
+		if (_key || _value || aux)
+			return -EINVAL;
+		break;
+	default:
+		return -EOPNOTSUPP;
+	}
+
+	f = fdget(fd);
+	if (!f.file)
+		return -EBADF;
+	ret = -EINVAL;
+	if (f.file->f_op != &fscontext_fops)
+		goto out_f;
+
+	fc = f.file->private_data;
+	if (fc->ops == &legacy_fs_context_ops) {
+		switch (cmd) {
+		case FSCONFIG_SET_BINARY:
+		case FSCONFIG_SET_PATH:
+		case FSCONFIG_SET_PATH_EMPTY:
+		case FSCONFIG_SET_FD:
+			ret = -EOPNOTSUPP;
+			goto out_f;
+		}
+	}
+
+	if (_key) {
+		param.key = strndup_user(_key, 256);
+		if (IS_ERR(param.key)) {
+			ret = PTR_ERR(param.key);
+			goto out_f;
+		}
+	}
+
+	switch (cmd) {
+	case FSCONFIG_SET_FLAG:
+		param.type = fs_value_is_flag;
+		break;
+	case FSCONFIG_SET_STRING:
+		param.type = fs_value_is_string;
+		param.string = strndup_user(_value, 256);
+		if (IS_ERR(param.string)) {
+			ret = PTR_ERR(param.string);
+			goto out_key;
+		}
+		param.size = strlen(param.string);
+		break;
+	case FSCONFIG_SET_BINARY:
+		param.type = fs_value_is_blob;
+		param.size = aux;
+		param.blob = memdup_user_nul(_value, aux);
+		if (IS_ERR(param.blob)) {
+			ret = PTR_ERR(param.blob);
+			goto out_key;
+		}
+		break;
+	case FSCONFIG_SET_PATH:
+		param.type = fs_value_is_filename;
+		param.name = getname_flags(_value, 0, NULL);
+		if (IS_ERR(param.name)) {
+			ret = PTR_ERR(param.name);
+			goto out_key;
+		}
+		param.dirfd = aux;
+		param.size = strlen(param.name->name);
+		break;
+	case FSCONFIG_SET_PATH_EMPTY:
+		param.type = fs_value_is_filename_empty;
+		param.name = getname_flags(_value, LOOKUP_EMPTY, NULL);
+		if (IS_ERR(param.name)) {
+			ret = PTR_ERR(param.name);
+			goto out_key;
+		}
+		param.dirfd = aux;
+		param.size = strlen(param.name->name);
+		break;
+	case FSCONFIG_SET_FD:
+		param.type = fs_value_is_file;
+		ret = -EBADF;
+		param.file = fget(aux);
+		if (!param.file)
+			goto out_key;
+		break;
+	default:
+		break;
+	}
+
+	ret = mutex_lock_interruptible(&fc->uapi_mutex);
+	if (ret == 0) {
+		ret = vfs_fsconfig_locked(fc, cmd, &param);
+		mutex_unlock(&fc->uapi_mutex);
+	}
+
+	/* Clean up the our record of any value that we obtained from
+	 * userspace.  Note that the value may have been stolen by the LSM or
+	 * filesystem, in which case the value pointer will have been cleared.
+	 */
+	switch (cmd) {
+	case FSCONFIG_SET_STRING:
+	case FSCONFIG_SET_BINARY:
+		kfree(param.string);
+		break;
+	case FSCONFIG_SET_PATH:
+	case FSCONFIG_SET_PATH_EMPTY:
+		if (param.name)
+			putname(param.name);
+		break;
+	case FSCONFIG_SET_FD:
+		if (param.file)
+			fput(param.file);
+		break;
+	default:
+		break;
+	}
+out_key:
+	kfree(param.key);
+out_f:
+	fdput(f);
+	return ret;
+}
diff --git a/fs/fuse/Kconfig b/fs/fuse/Kconfig
index 76f09ce7e5b2..24fc5a5c1b97 100644
--- a/fs/fuse/Kconfig
+++ b/fs/fuse/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config FUSE_FS
 	tristate "FUSE (Filesystem in Userspace) support"
 	select FS_POSIX_ACL
diff --git a/fs/fuse/Makefile b/fs/fuse/Makefile
index f7b807bc1027..9485019c2a14 100644
--- a/fs/fuse/Makefile
+++ b/fs/fuse/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the FUSE filesystem.
 #
diff --git a/fs/fuse/control.c b/fs/fuse/control.c
index 989df5accaee..14ce1e47f980 100644
--- a/fs/fuse/control.c
+++ b/fs/fuse/control.c
@@ -10,6 +10,7 @@
 
 #include <linux/init.h>
 #include <linux/module.h>
+#include <linux/fs_context.h>
 
 #define FUSE_CTL_SUPER_MAGIC 0x65735543
 
@@ -35,7 +36,9 @@ static ssize_t fuse_conn_abort_write(struct file *file, const char __user *buf,
 {
 	struct fuse_conn *fc = fuse_ctl_file_conn_get(file);
 	if (fc) {
-		fuse_abort_conn(fc, true);
+		if (fc->abort_err)
+			fc->aborted = true;
+		fuse_abort_conn(fc);
 		fuse_conn_put(fc);
 	}
 	return count;
@@ -315,7 +318,7 @@ void fuse_ctl_remove_conn(struct fuse_conn *fc)
 	drop_nlink(d_inode(fuse_control_sb->s_root));
 }
 
-static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
+static int fuse_ctl_fill_super(struct super_block *sb, struct fs_context *fctx)
 {
 	static const struct tree_descr empty_descr = {""};
 	struct fuse_conn *fc;
@@ -341,10 +344,19 @@ static int fuse_ctl_fill_super(struct super_block *sb, void *data, int silent)
 	return 0;
 }
 
-static struct dentry *fuse_ctl_mount(struct file_system_type *fs_type,
-			int flags, const char *dev_name, void *raw_data)
+static int fuse_ctl_get_tree(struct fs_context *fc)
 {
-	return mount_single(fs_type, flags, raw_data, fuse_ctl_fill_super);
+	return vfs_get_super(fc, vfs_get_single_super, fuse_ctl_fill_super);
+}
+
+static const struct fs_context_operations fuse_ctl_context_ops = {
+	.get_tree	= fuse_ctl_get_tree,
+};
+
+static int fuse_ctl_init_fs_context(struct fs_context *fc)
+{
+	fc->ops = &fuse_ctl_context_ops;
+	return 0;
 }
 
 static void fuse_ctl_kill_sb(struct super_block *sb)
@@ -363,7 +375,7 @@ static void fuse_ctl_kill_sb(struct super_block *sb)
 static struct file_system_type fuse_ctl_fs_type = {
 	.owner		= THIS_MODULE,
 	.name		= "fusectl",
-	.mount		= fuse_ctl_mount,
+	.init_fs_context = fuse_ctl_init_fs_context,
 	.kill_sb	= fuse_ctl_kill_sb,
 };
 MODULE_ALIAS_FS("fusectl");
diff --git a/fs/fuse/cuse.c b/fs/fuse/cuse.c
index 8f68181256c0..bab7a0db81dd 100644
--- a/fs/fuse/cuse.c
+++ b/fs/fuse/cuse.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * CUSE: Character device in Userspace
  *
  * Copyright (C) 2008-2009  SUSE Linux Products GmbH
  * Copyright (C) 2008-2009  Tejun Heo <tj@kernel.org>
  *
- * This file is released under the GPLv2.
- *
  * CUSE enables character devices to be implemented from userland much
  * like FUSE allows filesystems.  On initialization /dev/cuse is
  * created.  By opening the file and replying to the CUSE_INIT request
@@ -33,6 +32,8 @@
  * closed.
  */
 
+#define pr_fmt(fmt) "CUSE: " fmt
+
 #include <linux/fuse.h>
 #include <linux/cdev.h>
 #include <linux/device.h>
@@ -141,10 +142,11 @@ static int cuse_open(struct inode *inode, struct file *file)
 
 static int cuse_release(struct inode *inode, struct file *file)
 {
+	struct fuse_inode *fi = get_fuse_inode(inode);
 	struct fuse_file *ff = file->private_data;
 	struct fuse_conn *fc = ff->fc;
 
-	fuse_sync_release(ff, file->f_flags);
+	fuse_sync_release(fi, ff, file->f_flags);
 	fuse_conn_put(fc);
 
 	return 0;
@@ -224,7 +226,7 @@ static int cuse_parse_one(char **pp, char *end, char **keyp, char **valp)
 		return 0;
 
 	if (end[-1] != '\0') {
-		printk(KERN_ERR "CUSE: info not properly terminated\n");
+		pr_err("info not properly terminated\n");
 		return -EINVAL;
 	}
 
@@ -241,7 +243,7 @@ static int cuse_parse_one(char **pp, char *end, char **keyp, char **valp)
 		key = strstrip(key);
 
 	if (!strlen(key)) {
-		printk(KERN_ERR "CUSE: zero length info key specified\n");
+		pr_err("zero length info key specified\n");
 		return -EINVAL;
 	}
 
@@ -281,12 +283,11 @@ static int cuse_parse_devinfo(char *p, size_t len, struct cuse_devinfo *devinfo)
 		if (strcmp(key, "DEVNAME") == 0)
 			devinfo->name = val;
 		else
-			printk(KERN_WARNING "CUSE: unknown device info \"%s\"\n",
-			       key);
+			pr_warn("unknown device info \"%s\"\n", key);
 	}
 
 	if (!devinfo->name || !strlen(devinfo->name)) {
-		printk(KERN_ERR "CUSE: DEVNAME unspecified\n");
+		pr_err("DEVNAME unspecified\n");
 		return -EINVAL;
 	}
 
@@ -340,7 +341,7 @@ static void cuse_process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
 	else
 		rc = register_chrdev_region(devt, 1, devinfo.name);
 	if (rc) {
-		printk(KERN_ERR "CUSE: failed to register chrdev region\n");
+		pr_err("failed to register chrdev region\n");
 		goto err;
 	}
 
@@ -407,7 +408,7 @@ err_unlock:
 err_region:
 	unregister_chrdev_region(devt, 1);
 err:
-	fuse_abort_conn(fc, false);
+	fuse_abort_conn(fc);
 	goto out;
 }
 
@@ -586,7 +587,7 @@ static ssize_t cuse_class_abort_store(struct device *dev,
 {
 	struct cuse_conn *cc = dev_get_drvdata(dev);
 
-	fuse_abort_conn(&cc->fc, false);
+	fuse_abort_conn(&cc->fc);
 	return count;
 }
 static DEVICE_ATTR(abort, 0200, NULL, cuse_class_abort_store);
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c
index 809c0f2f9942..ea8237513dfa 100644
--- a/fs/fuse/dev.c
+++ b/fs/fuse/dev.c
@@ -251,17 +251,18 @@ static struct fuse_req *get_reserved_req(struct fuse_conn *fc,
 					 struct file *file)
 {
 	struct fuse_req *req = NULL;
+	struct fuse_inode *fi = get_fuse_inode(file_inode(file));
 	struct fuse_file *ff = file->private_data;
 
 	do {
 		wait_event(fc->reserved_req_waitq, ff->reserved_req);
-		spin_lock(&fc->lock);
+		spin_lock(&fi->lock);
 		if (ff->reserved_req) {
 			req = ff->reserved_req;
 			ff->reserved_req = NULL;
 			req->stolen_file = get_file(file);
 		}
-		spin_unlock(&fc->lock);
+		spin_unlock(&fi->lock);
 	} while (!req);
 
 	return req;
@@ -273,16 +274,17 @@ static struct fuse_req *get_reserved_req(struct fuse_conn *fc,
 static void put_reserved_req(struct fuse_conn *fc, struct fuse_req *req)
 {
 	struct file *file = req->stolen_file;
+	struct fuse_inode *fi = get_fuse_inode(file_inode(file));
 	struct fuse_file *ff = file->private_data;
 
 	WARN_ON(req->max_pages);
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	memset(req, 0, sizeof(*req));
 	fuse_request_init(req, NULL, NULL, 0);
 	BUG_ON(ff->reserved_req);
 	ff->reserved_req = req;
 	wake_up_all(&fc->reserved_req_waitq);
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 	fput(file);
 }
 
@@ -431,10 +433,16 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
 
 	if (test_and_set_bit(FR_FINISHED, &req->flags))
 		goto put_request;
-
-	spin_lock(&fiq->waitq.lock);
-	list_del_init(&req->intr_entry);
-	spin_unlock(&fiq->waitq.lock);
+	/*
+	 * test_and_set_bit() implies smp_mb() between bit
+	 * changing and below intr_entry check. Pairs with
+	 * smp_mb() from queue_interrupt().
+	 */
+	if (!list_empty(&req->intr_entry)) {
+		spin_lock(&fiq->waitq.lock);
+		list_del_init(&req->intr_entry);
+		spin_unlock(&fiq->waitq.lock);
+	}
 	WARN_ON(test_bit(FR_PENDING, &req->flags));
 	WARN_ON(test_bit(FR_SENT, &req->flags));
 	if (test_bit(FR_BACKGROUND, &req->flags)) {
@@ -462,27 +470,43 @@ static void request_end(struct fuse_conn *fc, struct fuse_req *req)
 		fc->active_background--;
 		flush_bg_queue(fc);
 		spin_unlock(&fc->bg_lock);
+	} else {
+		/* Wake up waiter sleeping in request_wait_answer() */
+		wake_up(&req->waitq);
 	}
-	wake_up(&req->waitq);
+
 	if (req->end)
 		req->end(fc, req);
 put_request:
 	fuse_put_request(fc, req);
 }
 
-static void queue_interrupt(struct fuse_iqueue *fiq, struct fuse_req *req)
+static int queue_interrupt(struct fuse_iqueue *fiq, struct fuse_req *req)
 {
 	spin_lock(&fiq->waitq.lock);
-	if (test_bit(FR_FINISHED, &req->flags)) {
+	/* Check for we've sent request to interrupt this req */
+	if (unlikely(!test_bit(FR_INTERRUPTED, &req->flags))) {
 		spin_unlock(&fiq->waitq.lock);
-		return;
+		return -EINVAL;
 	}
+
 	if (list_empty(&req->intr_entry)) {
 		list_add_tail(&req->intr_entry, &fiq->interrupts);
+		/*
+		 * Pairs with smp_mb() implied by test_and_set_bit()
+		 * from request_end().
+		 */
+		smp_mb();
+		if (test_bit(FR_FINISHED, &req->flags)) {
+			list_del_init(&req->intr_entry);
+			spin_unlock(&fiq->waitq.lock);
+			return 0;
+		}
 		wake_up_locked(&fiq->waitq);
+		kill_fasync(&fiq->fasync, SIGIO, POLL_IN);
 	}
 	spin_unlock(&fiq->waitq.lock);
-	kill_fasync(&fiq->fasync, SIGIO, POLL_IN);
+	return 0;
 }
 
 static void request_wait_answer(struct fuse_conn *fc, struct fuse_req *req)
@@ -882,8 +906,8 @@ static int fuse_check_page(struct page *page)
 	       1 << PG_lru |
 	       1 << PG_active |
 	       1 << PG_reclaim))) {
-		printk(KERN_WARNING "fuse: trying to steal weird page\n");
-		printk(KERN_WARNING "  page=%p index=%li flags=%08lx, count=%i, mapcount=%i, mapping=%p\n", page, page->index, page->flags, page_count(page), page_mapcount(page), page->mapping);
+		pr_warn("trying to steal weird page\n");
+		pr_warn("  page=%p index=%li flags=%08lx, count=%i, mapcount=%i, mapping=%p\n", page, page->index, page->flags, page_count(page), page_mapcount(page), page->mapping);
 		return 1;
 	}
 	return 0;
@@ -1306,7 +1330,7 @@ static ssize_t fuse_dev_do_read(struct fuse_dev *fud, struct file *file,
 		goto err_unlock;
 
 	if (!fiq->connected) {
-		err = (fc->aborted && fc->abort_err) ? -ECONNABORTED : -ENODEV;
+		err = fc->aborted ? -ECONNABORTED : -ENODEV;
 		goto err_unlock;
 	}
 
@@ -1353,7 +1377,7 @@ static ssize_t fuse_dev_do_read(struct fuse_dev *fud, struct file *file,
 	spin_lock(&fpq->lock);
 	clear_bit(FR_LOCKED, &req->flags);
 	if (!fpq->connected) {
-		err = (fc->aborted && fc->abort_err) ? -ECONNABORTED : -ENODEV;
+		err = fc->aborted ? -ECONNABORTED : -ENODEV;
 		goto out_end;
 	}
 	if (err) {
@@ -1725,7 +1749,7 @@ static int fuse_retrieve(struct fuse_conn *fc, struct inode *inode,
 	offset = outarg->offset & ~PAGE_MASK;
 	file_size = i_size_read(inode);
 
-	num = outarg->size;
+	num = min(outarg->size, fc->max_write);
 	if (outarg->offset > file_size)
 		num = 0;
 	else if (outarg->offset + num > file_size)
@@ -1900,16 +1924,17 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud,
 	struct fuse_req *req;
 	struct fuse_out_header oh;
 
+	err = -EINVAL;
 	if (nbytes < sizeof(struct fuse_out_header))
-		return -EINVAL;
+		goto out;
 
 	err = fuse_copy_one(cs, &oh, sizeof(oh));
 	if (err)
-		goto err_finish;
+		goto copy_finish;
 
 	err = -EINVAL;
 	if (oh.len != nbytes)
-		goto err_finish;
+		goto copy_finish;
 
 	/*
 	 * Zero oh.unique indicates unsolicited notification message
@@ -1917,41 +1942,40 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud,
 	 */
 	if (!oh.unique) {
 		err = fuse_notify(fc, oh.error, nbytes - sizeof(oh), cs);
-		return err ? err : nbytes;
+		goto out;
 	}
 
 	err = -EINVAL;
 	if (oh.error <= -1000 || oh.error > 0)
-		goto err_finish;
+		goto copy_finish;
 
 	spin_lock(&fpq->lock);
-	err = -ENOENT;
-	if (!fpq->connected)
-		goto err_unlock_pq;
+	req = NULL;
+	if (fpq->connected)
+		req = request_find(fpq, oh.unique & ~FUSE_INT_REQ_BIT);
 
-	req = request_find(fpq, oh.unique & ~FUSE_INT_REQ_BIT);
-	if (!req)
-		goto err_unlock_pq;
+	err = -ENOENT;
+	if (!req) {
+		spin_unlock(&fpq->lock);
+		goto copy_finish;
+	}
 
 	/* Is it an interrupt reply ID? */
 	if (oh.unique & FUSE_INT_REQ_BIT) {
 		__fuse_get_request(req);
 		spin_unlock(&fpq->lock);
 
-		err = -EINVAL;
-		if (nbytes != sizeof(struct fuse_out_header)) {
-			fuse_put_request(fc, req);
-			goto err_finish;
-		}
-
-		if (oh.error == -ENOSYS)
+		err = 0;
+		if (nbytes != sizeof(struct fuse_out_header))
+			err = -EINVAL;
+		else if (oh.error == -ENOSYS)
 			fc->no_interrupt = 1;
 		else if (oh.error == -EAGAIN)
-			queue_interrupt(&fc->iq, req);
+			err = queue_interrupt(&fc->iq, req);
+
 		fuse_put_request(fc, req);
 
-		fuse_copy_finish(cs);
-		return nbytes;
+		goto copy_finish;
 	}
 
 	clear_bit(FR_SENT, &req->flags);
@@ -1977,14 +2001,12 @@ static ssize_t fuse_dev_do_write(struct fuse_dev *fud,
 	spin_unlock(&fpq->lock);
 
 	request_end(fc, req);
-
+out:
 	return err ? err : nbytes;
 
- err_unlock_pq:
-	spin_unlock(&fpq->lock);
- err_finish:
+copy_finish:
 	fuse_copy_finish(cs);
-	return err;
+	goto out;
 }
 
 static ssize_t fuse_dev_write(struct kiocb *iocb, struct iov_iter *from)
@@ -2034,10 +2056,8 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe,
 		rem += pipe->bufs[(pipe->curbuf + idx) & (pipe->buffers - 1)].len;
 
 	ret = -EINVAL;
-	if (rem < len) {
-		pipe_unlock(pipe);
-		goto out;
-	}
+	if (rem < len)
+		goto out_free;
 
 	rem = len;
 	while (rem) {
@@ -2055,7 +2075,9 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe,
 			pipe->curbuf = (pipe->curbuf + 1) & (pipe->buffers - 1);
 			pipe->nrbufs--;
 		} else {
-			pipe_buf_get(pipe, ibuf);
+			if (!pipe_buf_get(pipe, ibuf))
+				goto out_free;
+
 			*obuf = *ibuf;
 			obuf->flags &= ~PIPE_BUF_FLAG_GIFT;
 			obuf->len = rem;
@@ -2078,11 +2100,11 @@ static ssize_t fuse_dev_splice_write(struct pipe_inode_info *pipe,
 	ret = fuse_dev_do_write(fud, &cs, len);
 
 	pipe_lock(pipe);
+out_free:
 	for (idx = 0; idx < nbuf; idx++)
 		pipe_buf_release(pipe, &bufs[idx]);
 	pipe_unlock(pipe);
 
-out:
 	kvfree(bufs);
 	return ret;
 }
@@ -2109,11 +2131,7 @@ static __poll_t fuse_dev_poll(struct file *file, poll_table *wait)
 	return mask;
 }
 
-/*
- * Abort all requests on the given list (pending or processing)
- *
- * This function releases and reacquires fc->lock
- */
+/* Abort all requests on the given list (pending or processing) */
 static void end_requests(struct fuse_conn *fc, struct list_head *head)
 {
 	while (!list_empty(head)) {
@@ -2159,7 +2177,7 @@ static void end_polls(struct fuse_conn *fc)
  * is OK, the request will in that case be removed from the list before we touch
  * it.
  */
-void fuse_abort_conn(struct fuse_conn *fc, bool is_abort)
+void fuse_abort_conn(struct fuse_conn *fc)
 {
 	struct fuse_iqueue *fiq = &fc->iq;
 
@@ -2175,7 +2193,6 @@ void fuse_abort_conn(struct fuse_conn *fc, bool is_abort)
 		fc->connected = 0;
 		spin_unlock(&fc->bg_lock);
 
-		fc->aborted = is_abort;
 		fuse_set_initialized(fc);
 		list_for_each_entry(fud, &fc->devices, entry) {
 			struct fuse_pqueue *fpq = &fud->pq;
@@ -2253,7 +2270,7 @@ int fuse_dev_release(struct inode *inode, struct file *file)
 		/* Are we the last open device? */
 		if (atomic_dec_and_test(&fc->dev_count)) {
 			WARN_ON(fc->iq.fasync != NULL);
-			fuse_abort_conn(fc, false);
+			fuse_abort_conn(fc);
 		}
 		fuse_dev_free(fud);
 	}
diff --git a/fs/fuse/dir.c b/fs/fuse/dir.c
index e909678afa2d..dd0f64f7bc06 100644
--- a/fs/fuse/dir.c
+++ b/fs/fuse/dir.c
@@ -149,21 +149,6 @@ static void fuse_lookup_init(struct fuse_conn *fc, struct fuse_args *args,
 	args->out.args[0].value = outarg;
 }
 
-u64 fuse_get_attr_version(struct fuse_conn *fc)
-{
-	u64 curr_version;
-
-	/*
-	 * The spin lock isn't actually needed on 64bit archs, but we
-	 * don't yet care too much about such optimizations.
-	 */
-	spin_lock(&fc->lock);
-	curr_version = fc->attr_version;
-	spin_unlock(&fc->lock);
-
-	return curr_version;
-}
-
 /*
  * Check whether the dentry is still valid
  *
@@ -222,9 +207,9 @@ static int fuse_dentry_revalidate(struct dentry *entry, unsigned int flags)
 				fuse_queue_forget(fc, forget, outarg.nodeid, 1);
 				goto invalid;
 			}
-			spin_lock(&fc->lock);
+			spin_lock(&fi->lock);
 			fi->nlookup++;
-			spin_unlock(&fc->lock);
+			spin_unlock(&fi->lock);
 		}
 		kfree(forget);
 		if (ret == -ENOMEM)
@@ -400,6 +385,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
 	struct fuse_create_in inarg;
 	struct fuse_open_out outopen;
 	struct fuse_entry_out outentry;
+	struct fuse_inode *fi;
 	struct fuse_file *ff;
 
 	/* Userspace expects S_IFREG in create mode */
@@ -451,7 +437,7 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
 			  &outentry.attr, entry_attr_timeout(&outentry), 0);
 	if (!inode) {
 		flags &= ~(O_CREAT | O_EXCL | O_TRUNC);
-		fuse_sync_release(ff, flags);
+		fuse_sync_release(NULL, ff, flags);
 		fuse_queue_forget(fc, forget, outentry.nodeid, 1);
 		err = -ENOMEM;
 		goto out_err;
@@ -462,7 +448,8 @@ static int fuse_create_open(struct inode *dir, struct dentry *entry,
 	fuse_dir_changed(dir);
 	err = finish_open(file, entry, generic_file_open);
 	if (err) {
-		fuse_sync_release(ff, flags);
+		fi = get_fuse_inode(inode);
+		fuse_sync_release(fi, ff, flags);
 	} else {
 		file->private_data = ff;
 		fuse_finish_open(inode, file);
@@ -671,8 +658,8 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry)
 		struct inode *inode = d_inode(entry);
 		struct fuse_inode *fi = get_fuse_inode(inode);
 
-		spin_lock(&fc->lock);
-		fi->attr_version = ++fc->attr_version;
+		spin_lock(&fi->lock);
+		fi->attr_version = atomic64_inc_return(&fc->attr_version);
 		/*
 		 * If i_nlink == 0 then unlink doesn't make sense, yet this can
 		 * happen if userspace filesystem is careless.  It would be
@@ -681,7 +668,7 @@ static int fuse_unlink(struct inode *dir, struct dentry *entry)
 		 */
 		if (inode->i_nlink > 0)
 			drop_nlink(inode);
-		spin_unlock(&fc->lock);
+		spin_unlock(&fi->lock);
 		fuse_invalidate_attr(inode);
 		fuse_dir_changed(dir);
 		fuse_invalidate_entry_cache(entry);
@@ -825,10 +812,10 @@ static int fuse_link(struct dentry *entry, struct inode *newdir,
 	if (!err) {
 		struct fuse_inode *fi = get_fuse_inode(inode);
 
-		spin_lock(&fc->lock);
-		fi->attr_version = ++fc->attr_version;
+		spin_lock(&fi->lock);
+		fi->attr_version = atomic64_inc_return(&fc->attr_version);
 		inc_nlink(inode);
-		spin_unlock(&fc->lock);
+		spin_unlock(&fi->lock);
 		fuse_invalidate_attr(inode);
 		fuse_update_ctime(inode);
 	} else if (err == -EINTR) {
@@ -1356,15 +1343,14 @@ static void iattr_to_fattr(struct fuse_conn *fc, struct iattr *iattr,
  */
 void fuse_set_nowrite(struct inode *inode)
 {
-	struct fuse_conn *fc = get_fuse_conn(inode);
 	struct fuse_inode *fi = get_fuse_inode(inode);
 
 	BUG_ON(!inode_is_locked(inode));
 
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	BUG_ON(fi->writectr < 0);
 	fi->writectr += FUSE_NOWRITE;
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 	wait_event(fi->page_waitq, fi->writectr == FUSE_NOWRITE);
 }
 
@@ -1385,11 +1371,11 @@ static void __fuse_release_nowrite(struct inode *inode)
 
 void fuse_release_nowrite(struct inode *inode)
 {
-	struct fuse_conn *fc = get_fuse_conn(inode);
+	struct fuse_inode *fi = get_fuse_inode(inode);
 
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	__fuse_release_nowrite(inode);
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 }
 
 static void fuse_setattr_fill(struct fuse_conn *fc, struct fuse_args *args,
@@ -1524,7 +1510,7 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr,
 		goto error;
 	}
 
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	/* the kernel maintains i_mtime locally */
 	if (trust_local_cmtime) {
 		if (attr->ia_valid & ATTR_MTIME)
@@ -1542,10 +1528,10 @@ int fuse_do_setattr(struct dentry *dentry, struct iattr *attr,
 		i_size_write(inode, outarg.attr.size);
 
 	if (is_truncate) {
-		/* NOTE: this may release/reacquire fc->lock */
+		/* NOTE: this may release/reacquire fi->lock */
 		__fuse_release_nowrite(inode);
 	}
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 
 	/*
 	 * Only call invalidate_inode_pages2() after removing
diff --git a/fs/fuse/file.c b/fs/fuse/file.c
index a59c16bd90ac..5ae2828beb00 100644
--- a/fs/fuse/file.c
+++ b/fs/fuse/file.c
@@ -19,8 +19,6 @@
 #include <linux/falloc.h>
 #include <linux/uio.h>
 
-static const struct file_operations fuse_direct_io_file_operations;
-
 static int fuse_send_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
 			  int opcode, struct fuse_open_out *outargp)
 {
@@ -64,9 +62,7 @@ struct fuse_file *fuse_file_alloc(struct fuse_conn *fc)
 	RB_CLEAR_NODE(&ff->polled_node);
 	init_waitqueue_head(&ff->poll_wait);
 
-	spin_lock(&fc->lock);
-	ff->kh = ++fc->khctr;
-	spin_unlock(&fc->lock);
+	ff->kh = atomic64_inc_return(&fc->khctr);
 
 	return ff;
 }
@@ -94,7 +90,7 @@ static void fuse_file_put(struct fuse_file *ff, bool sync, bool isdir)
 	if (refcount_dec_and_test(&ff->count)) {
 		struct fuse_req *req = ff->reserved_req;
 
-		if (ff->fc->no_open && !isdir) {
+		if (isdir ? ff->fc->no_opendir : ff->fc->no_open) {
 			/*
 			 * Drop the release request when client does not
 			 * implement 'open'
@@ -128,8 +124,9 @@ int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
 		return -ENOMEM;
 
 	ff->fh = 0;
-	ff->open_flags = FOPEN_KEEP_CACHE; /* Default for no-open */
-	if (!fc->no_open || isdir) {
+	/* Default for no-open */
+	ff->open_flags = FOPEN_KEEP_CACHE | (isdir ? FOPEN_CACHE_DIR : 0);
+	if (isdir ? !fc->no_opendir : !fc->no_open) {
 		struct fuse_open_out outarg;
 		int err;
 
@@ -138,11 +135,14 @@ int fuse_do_open(struct fuse_conn *fc, u64 nodeid, struct file *file,
 			ff->fh = outarg.fh;
 			ff->open_flags = outarg.open_flags;
 
-		} else if (err != -ENOSYS || isdir) {
+		} else if (err != -ENOSYS) {
 			fuse_file_free(ff);
 			return err;
 		} else {
-			fc->no_open = 1;
+			if (isdir)
+				fc->no_opendir = 1;
+			else
+				fc->no_open = 1;
 		}
 	}
 
@@ -159,17 +159,16 @@ EXPORT_SYMBOL_GPL(fuse_do_open);
 static void fuse_link_write_file(struct file *file)
 {
 	struct inode *inode = file_inode(file);
-	struct fuse_conn *fc = get_fuse_conn(inode);
 	struct fuse_inode *fi = get_fuse_inode(inode);
 	struct fuse_file *ff = file->private_data;
 	/*
 	 * file may be written through mmap, so chain it onto the
 	 * inodes's write_file list
 	 */
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	if (list_empty(&ff->write_entry))
 		list_add(&ff->write_entry, &fi->write_files);
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 }
 
 void fuse_finish_open(struct inode *inode, struct file *file)
@@ -177,19 +176,19 @@ void fuse_finish_open(struct inode *inode, struct file *file)
 	struct fuse_file *ff = file->private_data;
 	struct fuse_conn *fc = get_fuse_conn(inode);
 
-	if (ff->open_flags & FOPEN_DIRECT_IO)
-		file->f_op = &fuse_direct_io_file_operations;
 	if (!(ff->open_flags & FOPEN_KEEP_CACHE))
 		invalidate_inode_pages2(inode->i_mapping);
-	if (ff->open_flags & FOPEN_NONSEEKABLE)
+	if (ff->open_flags & FOPEN_STREAM)
+		stream_open(inode, file);
+	else if (ff->open_flags & FOPEN_NONSEEKABLE)
 		nonseekable_open(inode, file);
 	if (fc->atomic_o_trunc && (file->f_flags & O_TRUNC)) {
 		struct fuse_inode *fi = get_fuse_inode(inode);
 
-		spin_lock(&fc->lock);
-		fi->attr_version = ++fc->attr_version;
+		spin_lock(&fi->lock);
+		fi->attr_version = atomic64_inc_return(&fc->attr_version);
 		i_size_write(inode, 0);
-		spin_unlock(&fc->lock);
+		spin_unlock(&fi->lock);
 		fuse_invalidate_attr(inode);
 		if (fc->writeback_cache)
 			file_update_time(file);
@@ -224,14 +223,20 @@ int fuse_open_common(struct inode *inode, struct file *file, bool isdir)
 	return err;
 }
 
-static void fuse_prepare_release(struct fuse_file *ff, int flags, int opcode)
+static void fuse_prepare_release(struct fuse_inode *fi, struct fuse_file *ff,
+				 int flags, int opcode)
 {
 	struct fuse_conn *fc = ff->fc;
 	struct fuse_req *req = ff->reserved_req;
 	struct fuse_release_in *inarg = &req->misc.release.in;
 
+	/* Inode is NULL on error path of fuse_create_open() */
+	if (likely(fi)) {
+		spin_lock(&fi->lock);
+		list_del(&ff->write_entry);
+		spin_unlock(&fi->lock);
+	}
 	spin_lock(&fc->lock);
-	list_del(&ff->write_entry);
 	if (!RB_EMPTY_NODE(&ff->polled_node))
 		rb_erase(&ff->polled_node, &fc->polled_files);
 	spin_unlock(&fc->lock);
@@ -249,11 +254,12 @@ static void fuse_prepare_release(struct fuse_file *ff, int flags, int opcode)
 
 void fuse_release_common(struct file *file, bool isdir)
 {
+	struct fuse_inode *fi = get_fuse_inode(file_inode(file));
 	struct fuse_file *ff = file->private_data;
 	struct fuse_req *req = ff->reserved_req;
 	int opcode = isdir ? FUSE_RELEASEDIR : FUSE_RELEASE;
 
-	fuse_prepare_release(ff, file->f_flags, opcode);
+	fuse_prepare_release(fi, ff, file->f_flags, opcode);
 
 	if (ff->flock) {
 		struct fuse_release_in *inarg = &req->misc.release.in;
@@ -295,10 +301,10 @@ static int fuse_release(struct inode *inode, struct file *file)
 	return 0;
 }
 
-void fuse_sync_release(struct fuse_file *ff, int flags)
+void fuse_sync_release(struct fuse_inode *fi, struct fuse_file *ff, int flags)
 {
 	WARN_ON(refcount_read(&ff->count) > 1);
-	fuse_prepare_release(ff, flags, FUSE_RELEASE);
+	fuse_prepare_release(fi, ff, flags, FUSE_RELEASE);
 	/*
 	 * iput(NULL) is a no-op and since the refcount is 1 and everything's
 	 * synchronous, we are fine with not doing igrab() here"
@@ -329,33 +335,39 @@ u64 fuse_lock_owner_id(struct fuse_conn *fc, fl_owner_t id)
 	return (u64) v0 + ((u64) v1 << 32);
 }
 
-/*
- * Check if any page in a range is under writeback
- *
- * This is currently done by walking the list of writepage requests
- * for the inode, which can be pretty inefficient.
- */
-static bool fuse_range_is_writeback(struct inode *inode, pgoff_t idx_from,
-				   pgoff_t idx_to)
+static struct fuse_req *fuse_find_writeback(struct fuse_inode *fi,
+					    pgoff_t idx_from, pgoff_t idx_to)
 {
-	struct fuse_conn *fc = get_fuse_conn(inode);
-	struct fuse_inode *fi = get_fuse_inode(inode);
 	struct fuse_req *req;
-	bool found = false;
 
-	spin_lock(&fc->lock);
 	list_for_each_entry(req, &fi->writepages, writepages_entry) {
 		pgoff_t curr_index;
 
-		BUG_ON(req->inode != inode);
+		WARN_ON(get_fuse_inode(req->inode) != fi);
 		curr_index = req->misc.write.in.offset >> PAGE_SHIFT;
 		if (idx_from < curr_index + req->num_pages &&
 		    curr_index <= idx_to) {
-			found = true;
-			break;
+			return req;
 		}
 	}
-	spin_unlock(&fc->lock);
+	return NULL;
+}
+
+/*
+ * Check if any page in a range is under writeback
+ *
+ * This is currently done by walking the list of writepage requests
+ * for the inode, which can be pretty inefficient.
+ */
+static bool fuse_range_is_writeback(struct inode *inode, pgoff_t idx_from,
+				   pgoff_t idx_to)
+{
+	struct fuse_inode *fi = get_fuse_inode(inode);
+	bool found;
+
+	spin_lock(&fi->lock);
+	found = fuse_find_writeback(fi, idx_from, idx_to);
+	spin_unlock(&fi->lock);
 
 	return found;
 }
@@ -452,7 +464,7 @@ int fuse_fsync_common(struct file *file, loff_t start, loff_t end,
 
 	memset(&inarg, 0, sizeof(inarg));
 	inarg.fh = ff->fh;
-	inarg.fsync_flags = datasync ? 1 : 0;
+	inarg.fsync_flags = datasync ? FUSE_FSYNC_FDATASYNC : 0;
 	args.in.h.opcode = opcode;
 	args.in.h.nodeid = get_node_id(inode);
 	args.in.numargs = 1;
@@ -598,9 +610,9 @@ static void fuse_aio_complete(struct fuse_io_priv *io, int err, ssize_t pos)
 			struct fuse_conn *fc = get_fuse_conn(inode);
 			struct fuse_inode *fi = get_fuse_inode(inode);
 
-			spin_lock(&fc->lock);
-			fi->attr_version = ++fc->attr_version;
-			spin_unlock(&fc->lock);
+			spin_lock(&fi->lock);
+			fi->attr_version = atomic64_inc_return(&fc->attr_version);
+			spin_unlock(&fi->lock);
 		}
 
 		io->iocb->ki_complete(io->iocb, res, 0);
@@ -675,13 +687,13 @@ static void fuse_read_update_size(struct inode *inode, loff_t size,
 	struct fuse_conn *fc = get_fuse_conn(inode);
 	struct fuse_inode *fi = get_fuse_inode(inode);
 
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	if (attr_ver == fi->attr_version && size < inode->i_size &&
 	    !test_bit(FUSE_I_SIZE_UNSTABLE, &fi->state)) {
-		fi->attr_version = ++fc->attr_version;
+		fi->attr_version = atomic64_inc_return(&fc->attr_version);
 		i_size_write(inode, size);
 	}
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 }
 
 static void fuse_short_read(struct fuse_req *req, struct inode *inode,
@@ -919,7 +931,7 @@ out:
 	return err;
 }
 
-static ssize_t fuse_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
+static ssize_t fuse_cache_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
 	struct inode *inode = iocb->ki_filp->f_mapping->host;
 	struct fuse_conn *fc = get_fuse_conn(inode);
@@ -996,13 +1008,13 @@ bool fuse_write_update_size(struct inode *inode, loff_t pos)
 	struct fuse_inode *fi = get_fuse_inode(inode);
 	bool ret = false;
 
-	spin_lock(&fc->lock);
-	fi->attr_version = ++fc->attr_version;
+	spin_lock(&fi->lock);
+	fi->attr_version = atomic64_inc_return(&fc->attr_version);
 	if (pos > inode->i_size) {
 		i_size_write(inode, pos);
 		ret = true;
 	}
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 
 	return ret;
 }
@@ -1125,9 +1137,6 @@ static ssize_t fuse_perform_write(struct kiocb *iocb,
 	int err = 0;
 	ssize_t res = 0;
 
-	if (is_bad_inode(inode))
-		return -EIO;
-
 	if (inode->i_size < pos + iov_iter_count(ii))
 		set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
 
@@ -1173,7 +1182,7 @@ static ssize_t fuse_perform_write(struct kiocb *iocb,
 	return res > 0 ? res : err;
 }
 
-static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
+static ssize_t fuse_cache_write_iter(struct kiocb *iocb, struct iov_iter *from)
 {
 	struct file *file = iocb->ki_filp;
 	struct address_space *mapping = file->f_mapping;
@@ -1368,10 +1377,17 @@ ssize_t fuse_direct_io(struct fuse_io_priv *io, struct iov_iter *iter,
 		if (err && !nbytes)
 			break;
 
-		if (write)
+		if (write) {
+			if (!capable(CAP_FSETID)) {
+				struct fuse_write_in *inarg;
+
+				inarg = &req->misc.write.in;
+				inarg->write_flags |= FUSE_WRITE_KILL_PRIV;
+			}
 			nres = fuse_send_write(req, io, pos, nbytes, owner);
-		else
+		} else {
 			nres = fuse_send_read(req, io, pos, nbytes, owner);
+		}
 
 		if (!io->async)
 			fuse_release_user_pages(req, io->should_dirty);
@@ -1416,9 +1432,6 @@ static ssize_t __fuse_direct_read(struct fuse_io_priv *io,
 	ssize_t res;
 	struct inode *inode = file_inode(io->iocb->ki_filp);
 
-	if (is_bad_inode(inode))
-		return -EIO;
-
 	res = fuse_direct_io(io, iter, ppos, 0);
 
 	fuse_invalidate_atime(inode);
@@ -1426,10 +1439,21 @@ static ssize_t __fuse_direct_read(struct fuse_io_priv *io,
 	return res;
 }
 
+static ssize_t fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter);
+
 static ssize_t fuse_direct_read_iter(struct kiocb *iocb, struct iov_iter *to)
 {
-	struct fuse_io_priv io = FUSE_IO_PRIV_SYNC(iocb);
-	return __fuse_direct_read(&io, to, &iocb->ki_pos);
+	ssize_t res;
+
+	if (!is_sync_kiocb(iocb) && iocb->ki_flags & IOCB_DIRECT) {
+		res = fuse_direct_IO(iocb, to);
+	} else {
+		struct fuse_io_priv io = FUSE_IO_PRIV_SYNC(iocb);
+
+		res = __fuse_direct_read(&io, to, &iocb->ki_pos);
+	}
+
+	return res;
 }
 
 static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from)
@@ -1438,14 +1462,17 @@ static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	struct fuse_io_priv io = FUSE_IO_PRIV_SYNC(iocb);
 	ssize_t res;
 
-	if (is_bad_inode(inode))
-		return -EIO;
-
 	/* Don't allow parallel writes to the same file */
 	inode_lock(inode);
 	res = generic_write_checks(iocb, from);
-	if (res > 0)
-		res = fuse_direct_io(&io, from, &iocb->ki_pos, FUSE_DIO_WRITE);
+	if (res > 0) {
+		if (!is_sync_kiocb(iocb) && iocb->ki_flags & IOCB_DIRECT) {
+			res = fuse_direct_IO(iocb, from);
+		} else {
+			res = fuse_direct_io(&io, from, &iocb->ki_pos,
+					     FUSE_DIO_WRITE);
+		}
+	}
 	fuse_invalidate_attr(inode);
 	if (res > 0)
 		fuse_write_update_size(inode, iocb->ki_pos);
@@ -1454,6 +1481,34 @@ static ssize_t fuse_direct_write_iter(struct kiocb *iocb, struct iov_iter *from)
 	return res;
 }
 
+static ssize_t fuse_file_read_iter(struct kiocb *iocb, struct iov_iter *to)
+{
+	struct file *file = iocb->ki_filp;
+	struct fuse_file *ff = file->private_data;
+
+	if (is_bad_inode(file_inode(file)))
+		return -EIO;
+
+	if (!(ff->open_flags & FOPEN_DIRECT_IO))
+		return fuse_cache_read_iter(iocb, to);
+	else
+		return fuse_direct_read_iter(iocb, to);
+}
+
+static ssize_t fuse_file_write_iter(struct kiocb *iocb, struct iov_iter *from)
+{
+	struct file *file = iocb->ki_filp;
+	struct fuse_file *ff = file->private_data;
+
+	if (is_bad_inode(file_inode(file)))
+		return -EIO;
+
+	if (!(ff->open_flags & FOPEN_DIRECT_IO))
+		return fuse_cache_write_iter(iocb, from);
+	else
+		return fuse_direct_write_iter(iocb, from);
+}
+
 static void fuse_writepage_free(struct fuse_conn *fc, struct fuse_req *req)
 {
 	int i;
@@ -1481,20 +1536,18 @@ static void fuse_writepage_finish(struct fuse_conn *fc, struct fuse_req *req)
 	wake_up(&fi->page_waitq);
 }
 
-/* Called under fc->lock, may release and reacquire it */
+/* Called under fi->lock, may release and reacquire it */
 static void fuse_send_writepage(struct fuse_conn *fc, struct fuse_req *req,
 				loff_t size)
-__releases(fc->lock)
-__acquires(fc->lock)
+__releases(fi->lock)
+__acquires(fi->lock)
 {
+	struct fuse_req *aux, *next;
 	struct fuse_inode *fi = get_fuse_inode(req->inode);
 	struct fuse_write_in *inarg = &req->misc.write.in;
 	__u64 data_size = req->num_pages * PAGE_SIZE;
 	bool queued;
 
-	if (!fc->connected)
-		goto out_free;
-
 	if (inarg->offset + data_size <= size) {
 		inarg->size = data_size;
 	} else if (inarg->offset < size) {
@@ -1505,32 +1558,44 @@ __acquires(fc->lock)
 	}
 
 	req->in.args[1].size = inarg->size;
-	fi->writectr++;
 	queued = fuse_request_queue_background(fc, req);
-	WARN_ON(!queued);
+	/* Fails on broken connection only */
+	if (unlikely(!queued))
+		goto out_free;
+
+	fi->writectr++;
 	return;
 
  out_free:
 	fuse_writepage_finish(fc, req);
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
+
+	/* After fuse_writepage_finish() aux request list is private */
+	for (aux = req->misc.write.next; aux; aux = next) {
+		next = aux->misc.write.next;
+		aux->misc.write.next = NULL;
+		fuse_writepage_free(fc, aux);
+		fuse_put_request(fc, aux);
+	}
+
 	fuse_writepage_free(fc, req);
 	fuse_put_request(fc, req);
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 }
 
 /*
  * If fi->writectr is positive (no truncate or fsync going on) send
  * all queued writepage requests.
  *
- * Called with fc->lock
+ * Called with fi->lock
  */
 void fuse_flush_writepages(struct inode *inode)
-__releases(fc->lock)
-__acquires(fc->lock)
+__releases(fi->lock)
+__acquires(fi->lock)
 {
 	struct fuse_conn *fc = get_fuse_conn(inode);
 	struct fuse_inode *fi = get_fuse_inode(inode);
-	size_t crop = i_size_read(inode);
+	loff_t crop = i_size_read(inode);
 	struct fuse_req *req;
 
 	while (fi->writectr >= 0 && !list_empty(&fi->queued_writes)) {
@@ -1546,7 +1611,7 @@ static void fuse_writepage_end(struct fuse_conn *fc, struct fuse_req *req)
 	struct fuse_inode *fi = get_fuse_inode(inode);
 
 	mapping_set_error(inode->i_mapping, req->out.h.error);
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	while (req->misc.write.next) {
 		struct fuse_conn *fc = get_fuse_conn(inode);
 		struct fuse_write_in *inarg = &req->misc.write.in;
@@ -1583,7 +1648,7 @@ static void fuse_writepage_end(struct fuse_conn *fc, struct fuse_req *req)
 	}
 	fi->writectr--;
 	fuse_writepage_finish(fc, req);
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 	fuse_writepage_free(fc, req);
 }
 
@@ -1592,13 +1657,13 @@ static struct fuse_file *__fuse_write_file_get(struct fuse_conn *fc,
 {
 	struct fuse_file *ff = NULL;
 
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	if (!list_empty(&fi->write_files)) {
 		ff = list_entry(fi->write_files.next, struct fuse_file,
 				write_entry);
 		fuse_file_get(ff);
 	}
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 
 	return ff;
 }
@@ -1669,11 +1734,11 @@ static int fuse_writepage_locked(struct page *page)
 	inc_wb_stat(&inode_to_bdi(inode)->wb, WB_WRITEBACK);
 	inc_node_page_state(tmp_page, NR_WRITEBACK_TEMP);
 
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	list_add(&req->writepages_entry, &fi->writepages);
 	list_add_tail(&req->list, &fi->queued_writes);
 	fuse_flush_writepages(inode);
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 
 	end_page_writeback(page);
 
@@ -1722,21 +1787,27 @@ static void fuse_writepages_send(struct fuse_fill_wb_data *data)
 {
 	struct fuse_req *req = data->req;
 	struct inode *inode = data->inode;
-	struct fuse_conn *fc = get_fuse_conn(inode);
 	struct fuse_inode *fi = get_fuse_inode(inode);
 	int num_pages = req->num_pages;
 	int i;
 
 	req->ff = fuse_file_get(data->ff);
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	list_add_tail(&req->list, &fi->queued_writes);
 	fuse_flush_writepages(inode);
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 
 	for (i = 0; i < num_pages; i++)
 		end_page_writeback(data->orig_pages[i]);
 }
 
+/*
+ * First recheck under fi->lock if the offending offset is still under
+ * writeback.  If yes, then iterate auxiliary write requests, to see if there's
+ * one already added for a page at this offset.  If there's none, then insert
+ * this new request onto the auxiliary list, otherwise reuse the existing one by
+ * copying the new page contents over to the old temporary page.
+ */
 static bool fuse_writepage_in_flight(struct fuse_req *new_req,
 				     struct page *page)
 {
@@ -1744,57 +1815,50 @@ static bool fuse_writepage_in_flight(struct fuse_req *new_req,
 	struct fuse_inode *fi = get_fuse_inode(new_req->inode);
 	struct fuse_req *tmp;
 	struct fuse_req *old_req;
-	bool found = false;
-	pgoff_t curr_index;
 
-	BUG_ON(new_req->num_pages != 0);
+	WARN_ON(new_req->num_pages != 0);
 
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	list_del(&new_req->writepages_entry);
-	list_for_each_entry(old_req, &fi->writepages, writepages_entry) {
-		BUG_ON(old_req->inode != new_req->inode);
-		curr_index = old_req->misc.write.in.offset >> PAGE_SHIFT;
-		if (curr_index <= page->index &&
-		    page->index < curr_index + old_req->num_pages) {
-			found = true;
-			break;
-		}
-	}
-	if (!found) {
+	old_req = fuse_find_writeback(fi, page->index, page->index);
+	if (!old_req) {
 		list_add(&new_req->writepages_entry, &fi->writepages);
-		goto out_unlock;
+		spin_unlock(&fi->lock);
+		return false;
 	}
 
 	new_req->num_pages = 1;
-	for (tmp = old_req; tmp != NULL; tmp = tmp->misc.write.next) {
-		BUG_ON(tmp->inode != new_req->inode);
+	for (tmp = old_req->misc.write.next; tmp; tmp = tmp->misc.write.next) {
+		pgoff_t curr_index;
+
+		WARN_ON(tmp->inode != new_req->inode);
 		curr_index = tmp->misc.write.in.offset >> PAGE_SHIFT;
-		if (tmp->num_pages == 1 &&
-		    curr_index == page->index) {
-			old_req = tmp;
+		if (curr_index == page->index) {
+			WARN_ON(tmp->num_pages != 1);
+			WARN_ON(!test_bit(FR_PENDING, &tmp->flags));
+			swap(tmp->pages[0], new_req->pages[0]);
+			break;
 		}
 	}
 
-	if (old_req->num_pages == 1 && test_bit(FR_PENDING, &old_req->flags)) {
-		struct backing_dev_info *bdi = inode_to_bdi(page->mapping->host);
+	if (!tmp) {
+		new_req->misc.write.next = old_req->misc.write.next;
+		old_req->misc.write.next = new_req;
+	}
+
+	spin_unlock(&fi->lock);
 
-		copy_highpage(old_req->pages[0], page);
-		spin_unlock(&fc->lock);
+	if (tmp) {
+		struct backing_dev_info *bdi = inode_to_bdi(new_req->inode);
 
 		dec_wb_stat(&bdi->wb, WB_WRITEBACK);
 		dec_node_page_state(new_req->pages[0], NR_WRITEBACK_TEMP);
 		wb_writeout_inc(&bdi->wb);
 		fuse_writepage_free(fc, new_req);
 		fuse_request_free(new_req);
-		goto out;
-	} else {
-		new_req->misc.write.next = old_req->misc.write.next;
-		old_req->misc.write.next = new_req;
 	}
-out_unlock:
-	spin_unlock(&fc->lock);
-out:
-	return found;
+
+	return true;
 }
 
 static int fuse_writepages_fill(struct page *page,
@@ -1803,6 +1867,7 @@ static int fuse_writepages_fill(struct page *page,
 	struct fuse_fill_wb_data *data = _data;
 	struct fuse_req *req = data->req;
 	struct inode *inode = data->inode;
+	struct fuse_inode *fi = get_fuse_inode(inode);
 	struct fuse_conn *fc = get_fuse_conn(inode);
 	struct page *tmp_page;
 	bool is_writeback;
@@ -1873,9 +1938,9 @@ static int fuse_writepages_fill(struct page *page,
 		req->end = fuse_writepage_end;
 		req->inode = inode;
 
-		spin_lock(&fc->lock);
+		spin_lock(&fi->lock);
 		list_add(&req->writepages_entry, &fi->writepages);
-		spin_unlock(&fc->lock);
+		spin_unlock(&fi->lock);
 
 		data->req = req;
 	}
@@ -1898,12 +1963,12 @@ static int fuse_writepages_fill(struct page *page,
 	data->orig_pages[req->num_pages] = page;
 
 	/*
-	 * Protected by fc->lock against concurrent access by
+	 * Protected by fi->lock against concurrent access by
 	 * fuse_page_is_writeback().
 	 */
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	req->num_pages++;
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 
 out_unlock:
 	unlock_page(page);
@@ -2087,6 +2152,18 @@ static const struct vm_operations_struct fuse_file_vm_ops = {
 
 static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
+	struct fuse_file *ff = file->private_data;
+
+	if (ff->open_flags & FOPEN_DIRECT_IO) {
+		/* Can't provide the coherency needed for MAP_SHARED */
+		if (vma->vm_flags & VM_MAYSHARE)
+			return -ENODEV;
+
+		invalidate_inode_pages2(file->f_mapping);
+
+		return generic_file_mmap(file, vma);
+	}
+
 	if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE))
 		fuse_link_write_file(file);
 
@@ -2095,17 +2172,6 @@ static int fuse_file_mmap(struct file *file, struct vm_area_struct *vma)
 	return 0;
 }
 
-static int fuse_direct_mmap(struct file *file, struct vm_area_struct *vma)
-{
-	/* Can't provide the coherency needed for MAP_SHARED */
-	if (vma->vm_flags & VM_MAYSHARE)
-		return -ENODEV;
-
-	invalidate_inode_pages2(file->f_mapping);
-
-	return generic_file_mmap(file, vma);
-}
-
 static int convert_fuse_file_lock(struct fuse_conn *fc,
 				  const struct fuse_file_lock *ffl,
 				  struct file_lock *fl)
@@ -2519,8 +2585,13 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg,
 #if BITS_PER_LONG == 32
 	inarg.flags |= FUSE_IOCTL_32BIT;
 #else
-	if (flags & FUSE_IOCTL_COMPAT)
+	if (flags & FUSE_IOCTL_COMPAT) {
 		inarg.flags |= FUSE_IOCTL_32BIT;
+#ifdef CONFIG_X86_X32
+		if (in_x32_syscall())
+			inarg.flags |= FUSE_IOCTL_COMPAT_X32;
+#endif
+	}
 #endif
 
 	/* assume all the iovs returned by client always fits in a page */
@@ -2950,6 +3021,16 @@ fuse_direct_IO(struct kiocb *iocb, struct iov_iter *iter)
 	return ret;
 }
 
+static int fuse_writeback_range(struct inode *inode, loff_t start, loff_t end)
+{
+	int err = filemap_write_and_wait_range(inode->i_mapping, start, end);
+
+	if (!err)
+		fuse_sync_writes(inode);
+
+	return err;
+}
+
 static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
 				loff_t length)
 {
@@ -2978,15 +3059,20 @@ static long fuse_file_fallocate(struct file *file, int mode, loff_t offset,
 		inode_lock(inode);
 		if (mode & FALLOC_FL_PUNCH_HOLE) {
 			loff_t endbyte = offset + length - 1;
-			err = filemap_write_and_wait_range(inode->i_mapping,
-							   offset, endbyte);
+
+			err = fuse_writeback_range(inode, offset, endbyte);
 			if (err)
 				goto out;
-
-			fuse_sync_writes(inode);
 		}
 	}
 
+	if (!(mode & FALLOC_FL_KEEP_SIZE) &&
+	    offset + length > i_size_read(inode)) {
+		err = inode_newsize_ok(inode, offset + length);
+		if (err)
+			goto out;
+	}
+
 	if (!(mode & FALLOC_FL_KEEP_SIZE))
 		set_bit(FUSE_I_SIZE_UNSTABLE, &fi->state);
 
@@ -3026,12 +3112,13 @@ out:
 	return err;
 }
 
-static ssize_t fuse_copy_file_range(struct file *file_in, loff_t pos_in,
-				    struct file *file_out, loff_t pos_out,
-				    size_t len, unsigned int flags)
+static ssize_t __fuse_copy_file_range(struct file *file_in, loff_t pos_in,
+				      struct file *file_out, loff_t pos_out,
+				      size_t len, unsigned int flags)
 {
 	struct fuse_file *ff_in = file_in->private_data;
 	struct fuse_file *ff_out = file_out->private_data;
+	struct inode *inode_in = file_inode(file_in);
 	struct inode *inode_out = file_inode(file_out);
 	struct fuse_inode *fi_out = get_fuse_inode(inode_out);
 	struct fuse_conn *fc = ff_in->fc;
@@ -3055,15 +3142,27 @@ static ssize_t fuse_copy_file_range(struct file *file_in, loff_t pos_in,
 	if (fc->no_copy_file_range)
 		return -EOPNOTSUPP;
 
+	if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb)
+		return -EXDEV;
+
+	if (fc->writeback_cache) {
+		inode_lock(inode_in);
+		err = fuse_writeback_range(inode_in, pos_in, pos_in + len);
+		inode_unlock(inode_in);
+		if (err)
+			return err;
+	}
+
 	inode_lock(inode_out);
 
+	err = file_modified(file_out);
+	if (err)
+		goto out;
+
 	if (fc->writeback_cache) {
-		err = filemap_write_and_wait_range(inode_out->i_mapping,
-						   pos_out, pos_out + len);
+		err = fuse_writeback_range(inode_out, pos_out, pos_out + len);
 		if (err)
 			goto out;
-
-		fuse_sync_writes(inode_out);
 	}
 
 	if (is_unstable)
@@ -3098,10 +3197,26 @@ out:
 		clear_bit(FUSE_I_SIZE_UNSTABLE, &fi_out->state);
 
 	inode_unlock(inode_out);
+	file_accessed(file_in);
 
 	return err;
 }
 
+static ssize_t fuse_copy_file_range(struct file *src_file, loff_t src_off,
+				    struct file *dst_file, loff_t dst_off,
+				    size_t len, unsigned int flags)
+{
+	ssize_t ret;
+
+	ret = __fuse_copy_file_range(src_file, src_off, dst_file, dst_off,
+				     len, flags);
+
+	if (ret == -EOPNOTSUPP || ret == -EXDEV)
+		ret = generic_copy_file_range(src_file, src_off, dst_file,
+					      dst_off, len, flags);
+	return ret;
+}
+
 static const struct file_operations fuse_file_operations = {
 	.llseek		= fuse_file_llseek,
 	.read_iter	= fuse_file_read_iter,
@@ -3114,6 +3229,7 @@ static const struct file_operations fuse_file_operations = {
 	.lock		= fuse_file_lock,
 	.flock		= fuse_file_flock,
 	.splice_read	= generic_file_splice_read,
+	.splice_write	= iter_file_splice_write,
 	.unlocked_ioctl	= fuse_file_ioctl,
 	.compat_ioctl	= fuse_file_compat_ioctl,
 	.poll		= fuse_file_poll,
@@ -3121,24 +3237,6 @@ static const struct file_operations fuse_file_operations = {
 	.copy_file_range = fuse_copy_file_range,
 };
 
-static const struct file_operations fuse_direct_io_file_operations = {
-	.llseek		= fuse_file_llseek,
-	.read_iter	= fuse_direct_read_iter,
-	.write_iter	= fuse_direct_write_iter,
-	.mmap		= fuse_direct_mmap,
-	.open		= fuse_open,
-	.flush		= fuse_flush,
-	.release	= fuse_release,
-	.fsync		= fuse_fsync,
-	.lock		= fuse_file_lock,
-	.flock		= fuse_file_flock,
-	.unlocked_ioctl	= fuse_file_ioctl,
-	.compat_ioctl	= fuse_file_compat_ioctl,
-	.poll		= fuse_file_poll,
-	.fallocate	= fuse_file_fallocate,
-	/* no splice_read */
-};
-
 static const struct address_space_operations fuse_file_aops  = {
 	.readpage	= fuse_readpage,
 	.writepage	= fuse_writepage,
diff --git a/fs/fuse/fuse_i.h b/fs/fuse/fuse_i.h
index 2f2c92e6f8cb..24dbca777775 100644
--- a/fs/fuse/fuse_i.h
+++ b/fs/fuse/fuse_i.h
@@ -9,6 +9,10 @@
 #ifndef _FS_FUSE_I_H
 #define _FS_FUSE_I_H
 
+#ifndef pr_fmt
+# define pr_fmt(fmt) "fuse: " fmt
+#endif
+
 #include <linux/fuse.h>
 #include <linux/fs.h>
 #include <linux/mount.h>
@@ -96,7 +100,7 @@ struct fuse_inode {
 	union {
 		/* Write related fields (regular file only) */
 		struct {
-			/* Files usable in writepage.  Protected by fc->lock */
+			/* Files usable in writepage.  Protected by fi->lock */
 			struct list_head write_files;
 
 			/* Writepages pending on truncate or fsync */
@@ -144,6 +148,9 @@ struct fuse_inode {
 
 	/** Lock for serializing lookup and readdir for back compatibility*/
 	struct mutex mutex;
+
+	/** Lock to protect write related fields */
+	spinlock_t lock;
 };
 
 /** FUSE inode state bits */
@@ -163,7 +170,10 @@ struct fuse_file {
 	/** Fuse connection for this file */
 	struct fuse_conn *fc;
 
-	/** Request reserved for flush and release */
+	/*
+	 * Request reserved for flush and release.
+	 * Modified under relative fuse_inode::lock.
+	 */
 	struct fuse_req *reserved_req;
 
 	/** Kernel file handle guaranteed to be unique */
@@ -538,7 +548,7 @@ struct fuse_conn {
 	struct fuse_iqueue iq;
 
 	/** The next unique kernel file handle */
-	u64 khctr;
+	atomic64_t khctr;
 
 	/** rbtree of fuse_files waiting for poll events indexed by ph */
 	struct rb_root polled_files;
@@ -624,6 +634,9 @@ struct fuse_conn {
 	/** Is open/release not implemented by fs? */
 	unsigned no_open:1;
 
+	/** Is opendir/releasedir not implemented by fs? */
+	unsigned no_opendir:1;
+
 	/** Is fsync not implemented by fs? */
 	unsigned no_fsync:1;
 
@@ -681,6 +694,9 @@ struct fuse_conn {
 	/** Use enhanced/automatic page cache invalidation. */
 	unsigned auto_inval_data:1;
 
+	/** Filesystem is fully reponsible for page cache invalidation. */
+	unsigned explicit_inval_data:1;
+
 	/** Does the filesystem support readdirplus? */
 	unsigned do_readdirplus:1;
 
@@ -730,7 +746,7 @@ struct fuse_conn {
 	struct fuse_req *destroy_req;
 
 	/** Version counter for attribute changes */
-	u64 attr_version;
+	atomic64_t attr_version;
 
 	/** Called on final put */
 	void (*release)(struct fuse_conn *);
@@ -770,6 +786,11 @@ static inline int invalid_nodeid(u64 nodeid)
 	return !nodeid || nodeid == FUSE_ROOT_ID;
 }
 
+static inline u64 fuse_get_attr_version(struct fuse_conn *fc)
+{
+	return atomic64_read(&fc->attr_version);
+}
+
 /** Device operations */
 extern const struct file_operations fuse_dev_operations;
 
@@ -817,7 +838,7 @@ struct fuse_file *fuse_file_alloc(struct fuse_conn *fc);
 void fuse_file_free(struct fuse_file *ff);
 void fuse_finish_open(struct inode *inode, struct file *file);
 
-void fuse_sync_release(struct fuse_file *ff, int flags);
+void fuse_sync_release(struct fuse_inode *fi, struct fuse_file *ff, int flags);
 
 /**
  * Send RELEASE or RELEASEDIR request
@@ -936,7 +957,7 @@ void fuse_request_send_background(struct fuse_conn *fc, struct fuse_req *req);
 bool fuse_request_queue_background(struct fuse_conn *fc, struct fuse_req *req);
 
 /* Abort all requests */
-void fuse_abort_conn(struct fuse_conn *fc, bool is_abort);
+void fuse_abort_conn(struct fuse_conn *fc);
 void fuse_wait_aborted(struct fuse_conn *fc);
 
 /**
@@ -1000,8 +1021,6 @@ void fuse_flush_writepages(struct inode *inode);
 void fuse_set_nowrite(struct inode *inode);
 void fuse_release_nowrite(struct inode *inode);
 
-u64 fuse_get_attr_version(struct fuse_conn *fc);
-
 /**
  * File-system tells the kernel to invalidate cache for the given node id.
  */
diff --git a/fs/fuse/inode.c b/fs/fuse/inode.c
index c2d4099429be..4bb885b0f032 100644
--- a/fs/fuse/inode.c
+++ b/fs/fuse/inode.c
@@ -81,14 +81,12 @@ struct fuse_forget_link *fuse_alloc_forget(void)
 
 static struct inode *fuse_alloc_inode(struct super_block *sb)
 {
-	struct inode *inode;
 	struct fuse_inode *fi;
 
-	inode = kmem_cache_alloc(fuse_inode_cachep, GFP_KERNEL);
-	if (!inode)
+	fi = kmem_cache_alloc(fuse_inode_cachep, GFP_KERNEL);
+	if (!fi)
 		return NULL;
 
-	fi = get_fuse_inode(inode);
 	fi->i_time = 0;
 	fi->inval_mask = 0;
 	fi->nodeid = 0;
@@ -97,43 +95,40 @@ static struct inode *fuse_alloc_inode(struct super_block *sb)
 	fi->orig_ino = 0;
 	fi->state = 0;
 	mutex_init(&fi->mutex);
+	spin_lock_init(&fi->lock);
 	fi->forget = fuse_alloc_forget();
 	if (!fi->forget) {
-		kmem_cache_free(fuse_inode_cachep, inode);
+		kmem_cache_free(fuse_inode_cachep, fi);
 		return NULL;
 	}
 
-	return inode;
-}
-
-static void fuse_i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kmem_cache_free(fuse_inode_cachep, inode);
+	return &fi->inode;
 }
 
-static void fuse_destroy_inode(struct inode *inode)
+static void fuse_free_inode(struct inode *inode)
 {
 	struct fuse_inode *fi = get_fuse_inode(inode);
-	if (S_ISREG(inode->i_mode) && !is_bad_inode(inode)) {
-		WARN_ON(!list_empty(&fi->write_files));
-		WARN_ON(!list_empty(&fi->queued_writes));
-	}
+
 	mutex_destroy(&fi->mutex);
 	kfree(fi->forget);
-	call_rcu(&inode->i_rcu, fuse_i_callback);
+	kmem_cache_free(fuse_inode_cachep, fi);
 }
 
 static void fuse_evict_inode(struct inode *inode)
 {
+	struct fuse_inode *fi = get_fuse_inode(inode);
+
 	truncate_inode_pages_final(&inode->i_data);
 	clear_inode(inode);
 	if (inode->i_sb->s_flags & SB_ACTIVE) {
 		struct fuse_conn *fc = get_fuse_conn(inode);
-		struct fuse_inode *fi = get_fuse_inode(inode);
 		fuse_queue_forget(fc, fi->forget, fi->nodeid, fi->nlookup);
 		fi->forget = NULL;
 	}
+	if (S_ISREG(inode->i_mode) && !is_bad_inode(inode)) {
+		WARN_ON(!list_empty(&fi->write_files));
+		WARN_ON(!list_empty(&fi->queued_writes));
+	}
 }
 
 static int fuse_remount_fs(struct super_block *sb, int *flags, char *data)
@@ -163,7 +158,9 @@ void fuse_change_attributes_common(struct inode *inode, struct fuse_attr *attr,
 	struct fuse_conn *fc = get_fuse_conn(inode);
 	struct fuse_inode *fi = get_fuse_inode(inode);
 
-	fi->attr_version = ++fc->attr_version;
+	lockdep_assert_held(&fi->lock);
+
+	fi->attr_version = atomic64_inc_return(&fc->attr_version);
 	fi->i_time = attr_valid;
 	WRITE_ONCE(fi->inval_mask, 0);
 
@@ -209,10 +206,10 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
 	loff_t oldsize;
 	struct timespec64 old_mtime;
 
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	if ((attr_version != 0 && fi->attr_version > attr_version) ||
 	    test_bit(FUSE_I_SIZE_UNSTABLE, &fi->state)) {
-		spin_unlock(&fc->lock);
+		spin_unlock(&fi->lock);
 		return;
 	}
 
@@ -227,14 +224,15 @@ void fuse_change_attributes(struct inode *inode, struct fuse_attr *attr,
 	 */
 	if (!is_wb || !S_ISREG(inode->i_mode))
 		i_size_write(inode, attr->size);
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 
 	if (!is_wb && S_ISREG(inode->i_mode)) {
 		bool inval = false;
 
 		if (oldsize != attr->size) {
 			truncate_pagecache(inode, attr->size);
-			inval = true;
+			if (!fc->explicit_inval_data)
+				inval = true;
 		} else if (fc->auto_inval_data) {
 			struct timespec64 new_mtime = {
 				.tv_sec = attr->mtime,
@@ -322,9 +320,9 @@ struct inode *fuse_iget(struct super_block *sb, u64 nodeid,
 	}
 
 	fi = get_fuse_inode(inode);
-	spin_lock(&fc->lock);
+	spin_lock(&fi->lock);
 	fi->nlookup++;
-	spin_unlock(&fc->lock);
+	spin_unlock(&fi->lock);
 	fuse_change_attributes(inode, attr, attr_valid, attr_version);
 
 	return inode;
@@ -376,7 +374,7 @@ void fuse_unlock_inode(struct inode *inode, bool locked)
 
 static void fuse_umount_begin(struct super_block *sb)
 {
-	fuse_abort_conn(get_fuse_conn_super(sb), false);
+	fuse_abort_conn(get_fuse_conn_super(sb));
 }
 
 static void fuse_send_destroy(struct fuse_conn *fc)
@@ -619,12 +617,12 @@ void fuse_conn_init(struct fuse_conn *fc, struct user_namespace *user_ns)
 	atomic_set(&fc->num_waiting, 0);
 	fc->max_background = FUSE_DEFAULT_MAX_BACKGROUND;
 	fc->congestion_threshold = FUSE_DEFAULT_CONGESTION_THRESHOLD;
-	fc->khctr = 0;
+	atomic64_set(&fc->khctr, 0);
 	fc->polled_files = RB_ROOT;
 	fc->blocked = 0;
 	fc->initialized = 0;
 	fc->connected = 1;
-	fc->attr_version = 1;
+	atomic64_set(&fc->attr_version, 1);
 	get_random_bytes(&fc->scramble_key, sizeof(fc->scramble_key));
 	fc->pid_ns = get_pid_ns(task_active_pid_ns(current));
 	fc->user_ns = get_user_ns(user_ns);
@@ -811,7 +809,7 @@ static const struct export_operations fuse_export_operations = {
 
 static const struct super_operations fuse_super_operations = {
 	.alloc_inode    = fuse_alloc_inode,
-	.destroy_inode  = fuse_destroy_inode,
+	.free_inode     = fuse_free_inode,
 	.evict_inode	= fuse_evict_inode,
 	.write_inode	= fuse_write_inode,
 	.drop_inode	= generic_delete_inode,
@@ -909,6 +907,8 @@ static void process_init_reply(struct fuse_conn *fc, struct fuse_req *req)
 				fc->dont_mask = 1;
 			if (arg->flags & FUSE_AUTO_INVAL_DATA)
 				fc->auto_inval_data = 1;
+			else if (arg->flags & FUSE_EXPLICIT_INVAL_DATA)
+				fc->explicit_inval_data = 1;
 			if (arg->flags & FUSE_DO_READDIRPLUS) {
 				fc->do_readdirplus = 1;
 				if (arg->flags & FUSE_READDIRPLUS_AUTO)
@@ -969,7 +969,8 @@ static void fuse_send_init(struct fuse_conn *fc, struct fuse_req *req)
 		FUSE_DO_READDIRPLUS | FUSE_READDIRPLUS_AUTO | FUSE_ASYNC_DIO |
 		FUSE_WRITEBACK_CACHE | FUSE_NO_OPEN_SUPPORT |
 		FUSE_PARALLEL_DIROPS | FUSE_HANDLE_KILLPRIV | FUSE_POSIX_ACL |
-		FUSE_ABORT_ERROR | FUSE_MAX_PAGES | FUSE_CACHE_SYMLINKS;
+		FUSE_ABORT_ERROR | FUSE_MAX_PAGES | FUSE_CACHE_SYMLINKS |
+		FUSE_NO_OPENDIR_SUPPORT | FUSE_EXPLICIT_INVAL_DATA;
 	req->in.h.opcode = FUSE_INIT;
 	req->in.numargs = 1;
 	req->in.args[0].size = sizeof(*arg);
@@ -1010,7 +1011,7 @@ static int fuse_bdi_init(struct fuse_conn *fc, struct super_block *sb)
 	if (err)
 		return err;
 
-	sb->s_bdi->ra_pages = (VM_MAX_READAHEAD * 1024) / PAGE_SIZE;
+	sb->s_bdi->ra_pages = VM_READAHEAD_PAGES;
 	/* fuse does it's own writeback accounting */
 	sb->s_bdi->capabilities = BDI_CAP_NO_ACCT_WB | BDI_CAP_STRICTLIMIT;
 
@@ -1242,7 +1243,7 @@ static void fuse_sb_destroy(struct super_block *sb)
 	if (fc) {
 		fuse_send_destroy(fc);
 
-		fuse_abort_conn(fc, false);
+		fuse_abort_conn(fc);
 		fuse_wait_aborted(fc);
 
 		down_write(&fc->killsb);
@@ -1393,8 +1394,8 @@ static int __init fuse_init(void)
 {
 	int res;
 
-	printk(KERN_INFO "fuse init (API version %i.%i)\n",
-	       FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
+	pr_info("init (API version %i.%i)\n",
+		FUSE_KERNEL_VERSION, FUSE_KERNEL_MINOR_VERSION);
 
 	INIT_LIST_HEAD(&fuse_conn_list);
 	res = fuse_fs_init();
@@ -1430,7 +1431,7 @@ static int __init fuse_init(void)
 
 static void __exit fuse_exit(void)
 {
-	printk(KERN_DEBUG "fuse exit\n");
+	pr_debug("exit\n");
 
 	fuse_ctl_cleanup();
 	fuse_sysfs_cleanup();
diff --git a/fs/fuse/readdir.c b/fs/fuse/readdir.c
index ab18b78f4755..574d03f8a573 100644
--- a/fs/fuse/readdir.c
+++ b/fs/fuse/readdir.c
@@ -213,9 +213,9 @@ retry:
 		}
 
 		fi = get_fuse_inode(inode);
-		spin_lock(&fc->lock);
+		spin_lock(&fi->lock);
 		fi->nlookup++;
-		spin_unlock(&fc->lock);
+		spin_unlock(&fi->lock);
 
 		forget_all_cached_acls(inode);
 		fuse_change_attributes(inode, &o->attr,
diff --git a/fs/gfs2/Kconfig b/fs/gfs2/Kconfig
index 3ed2b088dcfd..03c966840422 100644
--- a/fs/gfs2/Kconfig
+++ b/fs/gfs2/Kconfig
@@ -1,6 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config GFS2_FS
 	tristate "GFS2 file system support"
-	depends on (64BIT || LBDAF)
 	select FS_POSIX_ACL
 	select CRC32
 	select LIBCRC32C
diff --git a/fs/gfs2/acl.c b/fs/gfs2/acl.c
index af5f87a493d9..09e6be8aa036 100644
--- a/fs/gfs2/acl.c
+++ b/fs/gfs2/acl.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/sched.h>
diff --git a/fs/gfs2/acl.h b/fs/gfs2/acl.h
index f674fdd22337..61353a1501c5 100644
--- a/fs/gfs2/acl.h
+++ b/fs/gfs2/acl.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __ACL_DOT_H__
diff --git a/fs/gfs2/aops.c b/fs/gfs2/aops.c
index 05dd78f4b2b3..f42048cc5454 100644
--- a/fs/gfs2/aops.c
+++ b/fs/gfs2/aops.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/sched.h>
@@ -85,15 +82,11 @@ static int gfs2_get_block_noalloc(struct inode *inode, sector_t lblock,
 }
 
 /**
- * gfs2_writepage_common - Common bits of writepage
- * @page: The page to be written
+ * gfs2_writepage - Write page for writeback mappings
+ * @page: The page
  * @wbc: The writeback control
- *
- * Returns: 1 if writepage is ok, otherwise an error code or zero if no error.
  */
-
-static int gfs2_writepage_common(struct page *page,
-				 struct writeback_control *wbc)
+static int gfs2_writepage(struct page *page, struct writeback_control *wbc)
 {
 	struct inode *inode = page->mapping->host;
 	struct gfs2_inode *ip = GFS2_I(inode);
@@ -112,7 +105,9 @@ static int gfs2_writepage_common(struct page *page,
 		page->mapping->a_ops->invalidatepage(page, 0, PAGE_SIZE);
 		goto out;
 	}
-	return 1;
+
+	return nobh_writepage(page, gfs2_get_block_noalloc, wbc);
+
 redirty:
 	redirty_page_for_writepage(wbc, page);
 out:
@@ -120,24 +115,6 @@ out:
 	return 0;
 }
 
-/**
- * gfs2_writepage - Write page for writeback mappings
- * @page: The page
- * @wbc: The writeback control
- *
- */
-
-static int gfs2_writepage(struct page *page, struct writeback_control *wbc)
-{
-	int ret;
-
-	ret = gfs2_writepage_common(page, wbc);
-	if (ret <= 0)
-		return ret;
-
-	return nobh_writepage(page, gfs2_get_block_noalloc, wbc);
-}
-
 /* This is the same as calling block_write_full_page, but it also
  * writes pages outside of i_size
  */
@@ -457,8 +434,7 @@ static int gfs2_jdata_writepages(struct address_space *mapping,
  *
  * Returns: errno
  */
-
-int stuffed_readpage(struct gfs2_inode *ip, struct page *page)
+static int stuffed_readpage(struct gfs2_inode *ip, struct page *page)
 {
 	struct buffer_head *dibh;
 	u64 dsize = i_size_read(&ip->i_inode);
@@ -521,7 +497,7 @@ static int __gfs2_readpage(void *file, struct page *page)
 		error = mpage_readpage(page, gfs2_block_map);
 	}
 
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+	if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags)))
 		return -EIO;
 
 	return error;
@@ -638,7 +614,7 @@ static int gfs2_readpages(struct file *file, struct address_space *mapping,
 	gfs2_glock_dq(&gh);
 out_uninit:
 	gfs2_holder_uninit(&gh);
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+	if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags)))
 		ret = -EIO;
 	return ret;
 }
@@ -649,7 +625,7 @@ out_uninit:
  */
 void adjust_fs_space(struct inode *inode)
 {
-	struct gfs2_sbd *sdp = inode->i_sb->s_fs_info;
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
 	struct gfs2_inode *m_ip = GFS2_I(sdp->sd_statfs_inode);
 	struct gfs2_inode *l_ip = GFS2_I(sdp->sd_sc_inode);
 	struct gfs2_statfs_change_host *m_sc = &sdp->sd_statfs_master;
@@ -657,10 +633,13 @@ void adjust_fs_space(struct inode *inode)
 	struct buffer_head *m_bh, *l_bh;
 	u64 fs_total, new_free;
 
+	if (gfs2_trans_begin(sdp, 2 * RES_STATFS, 0) != 0)
+		return;
+
 	/* Total up the file system space, according to the latest rindex. */
 	fs_total = gfs2_ri_total(sdp);
 	if (gfs2_meta_inode_buffer(m_ip, &m_bh) != 0)
-		return;
+		goto out;
 
 	spin_lock(&sdp->sd_statfs_spin);
 	gfs2_statfs_change_in(m_sc, m_bh->b_data +
@@ -675,52 +654,14 @@ void adjust_fs_space(struct inode *inode)
 	gfs2_statfs_change(sdp, new_free, new_free, 0);
 
 	if (gfs2_meta_inode_buffer(l_ip, &l_bh) != 0)
-		goto out;
+		goto out2;
 	update_statfs(sdp, m_bh, l_bh);
 	brelse(l_bh);
-out:
+out2:
 	brelse(m_bh);
-}
-
-/**
- * gfs2_stuffed_write_end - Write end for stuffed files
- * @inode: The inode
- * @dibh: The buffer_head containing the on-disk inode
- * @pos: The file position
- * @copied: How much was actually copied by the VFS
- * @page: The page
- *
- * This copies the data from the page into the inode block after
- * the inode data structure itself.
- *
- * Returns: copied bytes or errno
- */
-int gfs2_stuffed_write_end(struct inode *inode, struct buffer_head *dibh,
-			   loff_t pos, unsigned copied,
-			   struct page *page)
-{
-	struct gfs2_inode *ip = GFS2_I(inode);
-	u64 to = pos + copied;
-	void *kaddr;
-	unsigned char *buf = dibh->b_data + sizeof(struct gfs2_dinode);
-
-	BUG_ON(pos + copied > gfs2_max_stuffed_size(ip));
-
-	kaddr = kmap_atomic(page);
-	memcpy(buf + pos, kaddr + pos, copied);
-	flush_dcache_page(page);
-	kunmap_atomic(kaddr);
-
-	WARN_ON(!PageUptodate(page));
-	unlock_page(page);
-	put_page(page);
-
-	if (copied) {
-		if (inode->i_size < to)
-			i_size_write(inode, to);
-		mark_inode_dirty(inode);
-	}
-	return copied;
+out:
+	sdp->sd_rindex_uptodate = 0;
+	gfs2_trans_end(sdp);
 }
 
 /**
@@ -756,7 +697,7 @@ static sector_t gfs2_bmap(struct address_space *mapping, sector_t lblock)
 		return 0;
 
 	if (!gfs2_is_stuffed(ip))
-		dblock = generic_block_bmap(mapping, lblock, gfs2_block_map);
+		dblock = iomap_bmap(mapping, lblock, &gfs2_iomap_ops);
 
 	gfs2_glock_dq_uninit(&i_gh);
 
@@ -885,26 +826,11 @@ cannot_release:
 	return 0;
 }
 
-static const struct address_space_operations gfs2_writeback_aops = {
-	.writepage = gfs2_writepage,
-	.writepages = gfs2_writepages,
-	.readpage = gfs2_readpage,
-	.readpages = gfs2_readpages,
-	.bmap = gfs2_bmap,
-	.invalidatepage = gfs2_invalidatepage,
-	.releasepage = gfs2_releasepage,
-	.direct_IO = noop_direct_IO,
-	.migratepage = buffer_migrate_page,
-	.is_partially_uptodate = block_is_partially_uptodate,
-	.error_remove_page = generic_error_remove_page,
-};
-
-static const struct address_space_operations gfs2_ordered_aops = {
+static const struct address_space_operations gfs2_aops = {
 	.writepage = gfs2_writepage,
 	.writepages = gfs2_writepages,
 	.readpage = gfs2_readpage,
 	.readpages = gfs2_readpages,
-	.set_page_dirty = __set_page_dirty_buffers,
 	.bmap = gfs2_bmap,
 	.invalidatepage = gfs2_invalidatepage,
 	.releasepage = gfs2_releasepage,
@@ -929,15 +855,8 @@ static const struct address_space_operations gfs2_jdata_aops = {
 
 void gfs2_set_aops(struct inode *inode)
 {
-	struct gfs2_inode *ip = GFS2_I(inode);
-	struct gfs2_sbd *sdp = GFS2_SB(inode);
-
-	if (gfs2_is_jdata(ip))
+	if (gfs2_is_jdata(GFS2_I(inode)))
 		inode->i_mapping->a_ops = &gfs2_jdata_aops;
-	else if (gfs2_is_writeback(sdp))
-		inode->i_mapping->a_ops = &gfs2_writeback_aops;
-	else if (gfs2_is_ordered(sdp))
-		inode->i_mapping->a_ops = &gfs2_ordered_aops;
 	else
-		BUG();
+		inode->i_mapping->a_ops = &gfs2_aops;
 }
diff --git a/fs/gfs2/aops.h b/fs/gfs2/aops.h
index fa8e5d0144dd..ff9877a68780 100644
--- a/fs/gfs2/aops.h
+++ b/fs/gfs2/aops.h
@@ -8,10 +8,6 @@
 
 #include "incore.h"
 
-extern int stuffed_readpage(struct gfs2_inode *ip, struct page *page);
-extern int gfs2_stuffed_write_end(struct inode *inode, struct buffer_head *dibh,
-				  loff_t pos, unsigned copied,
-				  struct page *page);
 extern void adjust_fs_space(struct inode *inode);
 extern void gfs2_page_add_databufs(struct gfs2_inode *ip, struct page *page,
 				   unsigned int from, unsigned int len);
diff --git a/fs/gfs2/bmap.c b/fs/gfs2/bmap.c
index 02b2646d84b3..79581b9bdebb 100644
--- a/fs/gfs2/bmap.c
+++ b/fs/gfs2/bmap.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/spinlock.h>
@@ -142,7 +139,7 @@ int gfs2_unstuff_dinode(struct gfs2_inode *ip, struct page *page)
 		if (error)
 			goto out_brelse;
 		if (isdir) {
-			gfs2_trans_add_unrevoke(GFS2_SB(&ip->i_inode), block, 1);
+			gfs2_trans_remove_revoke(GFS2_SB(&ip->i_inode), block, 1);
 			error = gfs2_dir_get_new_buffer(ip, block, &bh);
 			if (error)
 				goto out_brelse;
@@ -598,7 +595,6 @@ enum alloc_state {
  * gfs2_iomap_alloc - Build a metadata tree of the requested height
  * @inode: The GFS2 inode
  * @iomap: The iomap structure
- * @flags: iomap flags
  * @mp: The metapath, with proper height information calculated
  *
  * In this routine we may have to alloc:
@@ -625,7 +621,7 @@ enum alloc_state {
  */
 
 static int gfs2_iomap_alloc(struct inode *inode, struct iomap *iomap,
-			    unsigned flags, struct metapath *mp)
+			    struct metapath *mp)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
@@ -676,7 +672,7 @@ static int gfs2_iomap_alloc(struct inode *inode, struct iomap *iomap,
 			goto out;
 		alloced += n;
 		if (state != ALLOC_DATA || gfs2_is_jdata(ip))
-			gfs2_trans_add_unrevoke(sdp, bn, n);
+			gfs2_trans_remove_revoke(sdp, bn, n);
 		switch (state) {
 		/* Growing height of tree */
 		case ALLOC_GROW_HEIGHT:
@@ -710,7 +706,7 @@ static int gfs2_iomap_alloc(struct inode *inode, struct iomap *iomap,
 			}
 			if (n == 0)
 				break;
-		/* Branching from existing tree */
+		/* fall through - To branching from existing tree */
 		case ALLOC_GROW_DEPTH:
 			if (i > 1 && i < mp->mp_fheight)
 				gfs2_trans_add_meta(ip->i_gl, mp->mp_bh[i-1]);
@@ -721,7 +717,7 @@ static int gfs2_iomap_alloc(struct inode *inode, struct iomap *iomap,
 				state = ALLOC_DATA;
 			if (n == 0)
 				break;
-		/* Tree complete, adding data blocks */
+		/* fall through - To tree complete, adding data blocks */
 		case ALLOC_DATA:
 			BUG_ON(n > dblks);
 			BUG_ON(mp->mp_bh[end_of_metadata] == NULL);
@@ -925,6 +921,32 @@ do_alloc:
 	goto out;
 }
 
+/**
+ * gfs2_lblk_to_dblk - convert logical block to disk block
+ * @inode: the inode of the file we're mapping
+ * @lblock: the block relative to the start of the file
+ * @dblock: the returned dblock, if no error
+ *
+ * This function maps a single block from a file logical block (relative to
+ * the start of the file) to a file system absolute block using iomap.
+ *
+ * Returns: the absolute file system block, or an error
+ */
+int gfs2_lblk_to_dblk(struct inode *inode, u32 lblock, u64 *dblock)
+{
+	struct iomap iomap = { };
+	struct metapath mp = { .mp_aheight = 1, };
+	loff_t pos = (loff_t)lblock << inode->i_blkbits;
+	int ret;
+
+	ret = gfs2_iomap_get(inode, pos, i_blocksize(inode), 0, &iomap, &mp);
+	release_metapath(&mp);
+	if (ret == 0)
+		*dblock = iomap.addr >> inode->i_blkbits;
+
+	return ret;
+}
+
 static int gfs2_write_lock(struct inode *inode)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
@@ -965,15 +987,34 @@ static void gfs2_write_unlock(struct inode *inode)
 	gfs2_glock_dq_uninit(&ip->i_gh);
 }
 
-static void gfs2_iomap_journaled_page_done(struct inode *inode, loff_t pos,
-				unsigned copied, struct page *page,
-				struct iomap *iomap)
+static int gfs2_iomap_page_prepare(struct inode *inode, loff_t pos,
+				   unsigned len, struct iomap *iomap)
+{
+	unsigned int blockmask = i_blocksize(inode) - 1;
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
+	unsigned int blocks;
+
+	blocks = ((pos & blockmask) + len + blockmask) >> inode->i_blkbits;
+	return gfs2_trans_begin(sdp, RES_DINODE + blocks, 0);
+}
+
+static void gfs2_iomap_page_done(struct inode *inode, loff_t pos,
+				 unsigned copied, struct page *page,
+				 struct iomap *iomap)
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
+	struct gfs2_sbd *sdp = GFS2_SB(inode);
 
-	gfs2_page_add_databufs(ip, page, offset_in_page(pos), copied);
+	if (page && !gfs2_is_stuffed(ip))
+		gfs2_page_add_databufs(ip, page, offset_in_page(pos), copied);
+	gfs2_trans_end(sdp);
 }
 
+static const struct iomap_page_ops gfs2_iomap_page_ops = {
+	.page_prepare = gfs2_iomap_page_prepare,
+	.page_done = gfs2_iomap_page_done,
+};
+
 static int gfs2_iomap_begin_write(struct inode *inode, loff_t pos,
 				  loff_t length, unsigned flags,
 				  struct iomap *iomap,
@@ -1026,32 +1067,46 @@ static int gfs2_iomap_begin_write(struct inode *inode, loff_t pos,
 	if (alloc_required)
 		rblocks += gfs2_rg_blocks(ip, data_blocks + ind_blocks);
 
-	ret = gfs2_trans_begin(sdp, rblocks, iomap->length >> inode->i_blkbits);
-	if (ret)
-		goto out_trans_fail;
+	if (unstuff || iomap->type == IOMAP_HOLE) {
+		struct gfs2_trans *tr;
 
-	if (unstuff) {
-		ret = gfs2_unstuff_dinode(ip, NULL);
+		ret = gfs2_trans_begin(sdp, rblocks,
+				       iomap->length >> inode->i_blkbits);
 		if (ret)
-			goto out_trans_end;
-		release_metapath(mp);
-		ret = gfs2_iomap_get(inode, iomap->offset, iomap->length,
-				     flags, iomap, mp);
-		if (ret)
-			goto out_trans_end;
-	}
+			goto out_trans_fail;
 
-	if (iomap->type == IOMAP_HOLE) {
-		ret = gfs2_iomap_alloc(inode, iomap, flags, mp);
-		if (ret) {
-			gfs2_trans_end(sdp);
-			gfs2_inplace_release(ip);
-			punch_hole(ip, iomap->offset, iomap->length);
-			goto out_qunlock;
+		if (unstuff) {
+			ret = gfs2_unstuff_dinode(ip, NULL);
+			if (ret)
+				goto out_trans_end;
+			release_metapath(mp);
+			ret = gfs2_iomap_get(inode, iomap->offset,
+					     iomap->length, flags, iomap, mp);
+			if (ret)
+				goto out_trans_end;
 		}
+
+		if (iomap->type == IOMAP_HOLE) {
+			ret = gfs2_iomap_alloc(inode, iomap, mp);
+			if (ret) {
+				gfs2_trans_end(sdp);
+				gfs2_inplace_release(ip);
+				punch_hole(ip, iomap->offset, iomap->length);
+				goto out_qunlock;
+			}
+		}
+
+		tr = current->journal_info;
+		if (tr->tr_num_buf_new)
+			__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
+		else
+			gfs2_trans_add_meta(ip->i_gl, mp->mp_bh[0]);
+
+		gfs2_trans_end(sdp);
 	}
-	if (!gfs2_is_stuffed(ip) && gfs2_is_jdata(ip))
-		iomap->page_done = gfs2_iomap_journaled_page_done;
+
+	if (gfs2_is_stuffed(ip) || gfs2_is_jdata(ip))
+		iomap->page_ops = &gfs2_iomap_page_ops;
 	return 0;
 
 out_trans_end:
@@ -1090,10 +1145,6 @@ static int gfs2_iomap_begin(struct inode *inode, loff_t pos, loff_t length,
 		    iomap->type != IOMAP_MAPPED)
 			ret = -ENOTBLK;
 	}
-	if (!ret) {
-		get_bh(mp.mp_bh[0]);
-		iomap->private = mp.mp_bh[0];
-	}
 	release_metapath(&mp);
 	trace_gfs2_iomap_end(ip, iomap, ret);
 	return ret;
@@ -1104,27 +1155,16 @@ static int gfs2_iomap_end(struct inode *inode, loff_t pos, loff_t length,
 {
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
-	struct gfs2_trans *tr = current->journal_info;
-	struct buffer_head *dibh = iomap->private;
 
 	if ((flags & (IOMAP_WRITE | IOMAP_DIRECT)) != IOMAP_WRITE)
 		goto out;
 
-	if (iomap->type != IOMAP_INLINE) {
+	if (!gfs2_is_stuffed(ip))
 		gfs2_ordered_add_inode(ip);
 
-		if (tr->tr_num_buf_new)
-			__mark_inode_dirty(inode, I_DIRTY_DATASYNC);
-		else
-			gfs2_trans_add_meta(ip->i_gl, dibh);
-	}
-
-	if (inode == sdp->sd_rindex) {
+	if (inode == sdp->sd_rindex)
 		adjust_fs_space(inode);
-		sdp->sd_rindex_uptodate = 0;
-	}
 
-	gfs2_trans_end(sdp);
 	gfs2_inplace_release(ip);
 
 	if (length != written && (iomap->flags & IOMAP_F_NEW)) {
@@ -1141,11 +1181,11 @@ static int gfs2_iomap_end(struct inode *inode, loff_t pos, loff_t length,
 
 	if (ip->i_qadata && ip->i_qadata->qa_qd_num)
 		gfs2_quota_unlock(ip);
+	if (iomap->flags & IOMAP_F_SIZE_CHANGED)
+		mark_inode_dirty(inode);
 	gfs2_write_unlock(inode);
 
 out:
-	if (dibh)
-		brelse(dibh);
 	return 0;
 }
 
@@ -1193,7 +1233,7 @@ int gfs2_block_map(struct inode *inode, sector_t lblock,
 	if (create) {
 		ret = gfs2_iomap_get(inode, pos, length, IOMAP_WRITE, &iomap, &mp);
 		if (!ret && iomap.type == IOMAP_HOLE)
-			ret = gfs2_iomap_alloc(inode, &iomap, IOMAP_WRITE, &mp);
+			ret = gfs2_iomap_alloc(inode, &iomap, &mp);
 		release_metapath(&mp);
 	} else {
 		ret = gfs2_iomap_get(inode, pos, length, 0, &iomap, &mp);
@@ -1423,7 +1463,7 @@ int gfs2_iomap_get_alloc(struct inode *inode, loff_t pos, loff_t length,
 
 	ret = gfs2_iomap_get(inode, pos, length, IOMAP_WRITE, iomap, &mp);
 	if (!ret && iomap->type == IOMAP_HOLE)
-		ret = gfs2_iomap_alloc(inode, iomap, IOMAP_WRITE, &mp);
+		ret = gfs2_iomap_alloc(inode, iomap, &mp);
 	release_metapath(&mp);
 	return ret;
 }
@@ -1823,9 +1863,8 @@ static int punch_hole(struct gfs2_inode *ip, u64 offset, u64 length)
 			gfs2_assert_withdraw(sdp, bh);
 			if (gfs2_assert_withdraw(sdp,
 						 prev_bnr != bh->b_blocknr)) {
-				printk(KERN_EMERG "GFS2: fsid=%s:inode %llu, "
-				       "block:%llu, i_h:%u, s_h:%u, mp_h:%u\n",
-				       sdp->sd_fsname,
+				fs_emerg(sdp, "inode %llu, block:%llu, i_h:%u,"
+					 "s_h:%u, mp_h:%u\n",
 				       (unsigned long long)ip->i_no_addr,
 				       prev_bnr, ip->i_height, strip_h, mp_h);
 			}
diff --git a/fs/gfs2/bmap.h b/fs/gfs2/bmap.h
index 6b18fb323f0a..b88fd45ab79f 100644
--- a/fs/gfs2/bmap.h
+++ b/fs/gfs2/bmap.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __BMAP_DOT_H__
@@ -64,5 +61,6 @@ extern int gfs2_write_alloc_required(struct gfs2_inode *ip, u64 offset,
 extern int gfs2_map_journal_extents(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd);
 extern void gfs2_free_journal_extents(struct gfs2_jdesc *jd);
 extern int __gfs2_punch_hole(struct file *file, loff_t offset, loff_t length);
+extern int gfs2_lblk_to_dblk(struct inode *inode, u32 lblock, u64 *dblock);
 
 #endif /* __BMAP_DOT_H__ */
diff --git a/fs/gfs2/dentry.c b/fs/gfs2/dentry.c
index 5173b98ca036..a7bb76e9a82b 100644
--- a/fs/gfs2/dentry.c
+++ b/fs/gfs2/dentry.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/spinlock.h>
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index daa14ab4e31b..6f35d19eec25 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 /*
@@ -753,7 +750,7 @@ static struct gfs2_dirent *gfs2_dirent_split_alloc(struct inode *inode,
 	struct gfs2_dirent *dent;
 	dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size,
 				gfs2_dirent_find_offset, name, ptr);
-	if (!dent || IS_ERR(dent))
+	if (IS_ERR_OR_NULL(dent))
 		return dent;
 	return do_init_dirent(inode, dent, name, bh,
 			      (unsigned)(ptr - (void *)dent));
@@ -857,7 +854,7 @@ static struct gfs2_dirent *gfs2_dirent_search(struct inode *inode,
 		return ERR_PTR(error);
 	dent = gfs2_dirent_scan(inode, bh->b_data, bh->b_size, scan, name, NULL);
 got_dent:
-	if (unlikely(dent == NULL || IS_ERR(dent))) {
+	if (IS_ERR_OR_NULL(dent)) {
 		brelse(bh);
 		bh = NULL;
 	}
@@ -883,7 +880,7 @@ static struct gfs2_leaf *new_leaf(struct inode *inode, struct buffer_head **pbh,
 	if (!bh)
 		return NULL;
 
-	gfs2_trans_add_unrevoke(GFS2_SB(inode), bn, 1);
+	gfs2_trans_remove_revoke(GFS2_SB(inode), bn, 1);
 	gfs2_trans_add_meta(ip->i_gl, bh);
 	gfs2_metatype_set(bh, GFS2_METATYPE_LF, GFS2_FORMAT_LF);
 	leaf = (struct gfs2_leaf *)bh->b_data;
diff --git a/fs/gfs2/dir.h b/fs/gfs2/dir.h
index e1b309c24dab..0ac2dc8564df 100644
--- a/fs/gfs2/dir.h
+++ b/fs/gfs2/dir.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __DIR_DOT_H__
diff --git a/fs/gfs2/export.c b/fs/gfs2/export.c
index a332f3cd925e..3f717285ee48 100644
--- a/fs/gfs2/export.c
+++ b/fs/gfs2/export.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/spinlock.h>
diff --git a/fs/gfs2/file.c b/fs/gfs2/file.c
index a2dea5bc0427..52fa1ef8400b 100644
--- a/fs/gfs2/file.c
+++ b/fs/gfs2/file.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/slab.h>
@@ -139,27 +136,36 @@ static struct {
 	{FS_JOURNAL_DATA_FL, GFS2_DIF_JDATA | GFS2_DIF_INHERIT_JDATA},
 };
 
+static inline u32 gfs2_gfsflags_to_fsflags(struct inode *inode, u32 gfsflags)
+{
+	int i;
+	u32 fsflags = 0;
+
+	if (S_ISDIR(inode->i_mode))
+		gfsflags &= ~GFS2_DIF_JDATA;
+	else
+		gfsflags &= ~GFS2_DIF_INHERIT_JDATA;
+
+	for (i = 0; i < ARRAY_SIZE(fsflag_gfs2flag); i++)
+		if (gfsflags & fsflag_gfs2flag[i].gfsflag)
+			fsflags |= fsflag_gfs2flag[i].fsflag;
+	return fsflags;
+}
+
 static int gfs2_get_flags(struct file *filp, u32 __user *ptr)
 {
 	struct inode *inode = file_inode(filp);
 	struct gfs2_inode *ip = GFS2_I(inode);
 	struct gfs2_holder gh;
-	int i, error;
-	u32 gfsflags, fsflags = 0;
+	int error;
+	u32 fsflags;
 
 	gfs2_holder_init(ip->i_gl, LM_ST_SHARED, 0, &gh);
 	error = gfs2_glock_nq(&gh);
 	if (error)
 		goto out_uninit;
 
-	gfsflags = ip->i_diskflags;
-	if (S_ISDIR(inode->i_mode))
-		gfsflags &= ~GFS2_DIF_JDATA;
-	else
-		gfsflags &= ~GFS2_DIF_INHERIT_JDATA;
-	for (i = 0; i < ARRAY_SIZE(fsflag_gfs2flag); i++)
-		if (gfsflags & fsflag_gfs2flag[i].gfsflag)
-			fsflags |= fsflag_gfs2flag[i].fsflag;
+	fsflags = gfs2_gfsflags_to_fsflags(inode, ip->i_diskflags);
 
 	if (put_user(fsflags, ptr))
 		error = -EFAULT;
@@ -203,9 +209,11 @@ void gfs2_set_inode_flags(struct inode *inode)
  * @filp: file pointer
  * @reqflags: The flags to set
  * @mask: Indicates which flags are valid
+ * @fsflags: The FS_* inode flags passed in
  *
  */
-static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
+static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask,
+			     const u32 fsflags)
 {
 	struct inode *inode = file_inode(filp);
 	struct gfs2_inode *ip = GFS2_I(inode);
@@ -213,7 +221,7 @@ static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
 	struct buffer_head *bh;
 	struct gfs2_holder gh;
 	int error;
-	u32 new_flags, flags;
+	u32 new_flags, flags, oldflags;
 
 	error = mnt_want_write_file(filp);
 	if (error)
@@ -223,6 +231,11 @@ static int do_gfs2_set_flags(struct file *filp, u32 reqflags, u32 mask)
 	if (error)
 		goto out_drop_write;
 
+	oldflags = gfs2_gfsflags_to_fsflags(inode, ip->i_diskflags);
+	error = vfs_ioc_setflags_prepare(inode, oldflags, fsflags);
+	if (error)
+		goto out;
+
 	error = -EACCES;
 	if (!inode_owner_or_capable(inode))
 		goto out;
@@ -311,7 +324,7 @@ static int gfs2_set_flags(struct file *filp, u32 __user *ptr)
 		mask &= ~(GFS2_DIF_TOPDIR | GFS2_DIF_INHERIT_JDATA);
 	}
 
-	return do_gfs2_set_flags(filp, gfsflags, mask);
+	return do_gfs2_set_flags(filp, gfsflags, mask, fsflags);
 }
 
 static int gfs2_getlabel(struct file *filp, char __user *label)
@@ -366,31 +379,30 @@ static void gfs2_size_hint(struct file *filep, loff_t offset, size_t size)
 }
 
 /**
- * gfs2_allocate_page_backing - Use bmap to allocate blocks
+ * gfs2_allocate_page_backing - Allocate blocks for a write fault
  * @page: The (locked) page to allocate backing for
  *
- * We try to allocate all the blocks required for the page in
- * one go. This might fail for various reasons, so we keep
- * trying until all the blocks to back this page are allocated.
- * If some of the blocks are already allocated, thats ok too.
+ * We try to allocate all the blocks required for the page in one go.  This
+ * might fail for various reasons, so we keep trying until all the blocks to
+ * back this page are allocated.  If some of the blocks are already allocated,
+ * that is ok too.
  */
-
 static int gfs2_allocate_page_backing(struct page *page)
 {
-	struct inode *inode = page->mapping->host;
-	struct buffer_head bh;
-	unsigned long size = PAGE_SIZE;
-	u64 lblock = page->index << (PAGE_SHIFT - inode->i_blkbits);
+	u64 pos = page_offset(page);
+	u64 size = PAGE_SIZE;
 
 	do {
-		bh.b_state = 0;
-		bh.b_size = size;
-		gfs2_block_map(inode, lblock, &bh, 1);
-		if (!buffer_mapped(&bh))
+		struct iomap iomap = { };
+
+		if (gfs2_iomap_get_alloc(page->mapping->host, pos, 1, &iomap))
 			return -EIO;
-		size -= bh.b_size;
-		lblock += (bh.b_size >> inode->i_blkbits);
-	} while(size > 0);
+
+		iomap.length = min(iomap.length, size);
+		size -= iomap.length;
+		pos += iomap.length;
+	} while (size > 0);
+
 	return 0;
 }
 
@@ -411,7 +423,7 @@ static vm_fault_t gfs2_page_mkwrite(struct vm_fault *vmf)
 	struct gfs2_sbd *sdp = GFS2_SB(inode);
 	struct gfs2_alloc_parms ap = { .aflags = 0, };
 	unsigned long last_index;
-	u64 pos = page->index << PAGE_SHIFT;
+	u64 pos = page_offset(page);
 	unsigned int data_blocks, ind_blocks, rblocks;
 	struct gfs2_holder gh;
 	loff_t size;
@@ -1169,7 +1181,7 @@ static int gfs2_lock(struct file *file, int cmd, struct file_lock *fl)
 		cmd = F_SETLK;
 		fl->fl_type = F_UNLCK;
 	}
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) {
+	if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags))) {
 		if (fl->fl_type == F_UNLCK)
 			locks_lock_file_wait(file, fl);
 		return -EIO;
@@ -1280,6 +1292,7 @@ const struct file_operations gfs2_file_fops = {
 	.llseek		= gfs2_llseek,
 	.read_iter	= gfs2_file_read_iter,
 	.write_iter	= gfs2_file_write_iter,
+	.iopoll		= iomap_dio_iopoll,
 	.unlocked_ioctl	= gfs2_ioctl,
 	.mmap		= gfs2_mmap,
 	.open		= gfs2_open,
@@ -1310,6 +1323,7 @@ const struct file_operations gfs2_file_fops_nolock = {
 	.llseek		= gfs2_llseek,
 	.read_iter	= gfs2_file_read_iter,
 	.write_iter	= gfs2_file_write_iter,
+	.iopoll		= iomap_dio_iopoll,
 	.unlocked_ioctl	= gfs2_ioctl,
 	.mmap		= gfs2_mmap,
 	.open		= gfs2_open,
diff --git a/fs/gfs2/gfs2.h b/fs/gfs2/gfs2.h
index ef606e3a5cf4..ed78e5f20f41 100644
--- a/fs/gfs2/gfs2.h
+++ b/fs/gfs2/gfs2.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __GFS2_DOT_H__
diff --git a/fs/gfs2/glock.c b/fs/gfs2/glock.c
index b92740edc416..e23fb8b7b020 100644
--- a/fs/gfs2/glock.c
+++ b/fs/gfs2/glock.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -107,7 +104,7 @@ static int glock_wake_function(wait_queue_entry_t *wait, unsigned int mode,
 
 static wait_queue_head_t *glock_waitqueue(struct lm_lockname *name)
 {
-	u32 hash = jhash2((u32 *)name, sizeof(*name) / 4, 0);
+	u32 hash = jhash2((u32 *)name, ht_parms.key_len / 4, 0);
 
 	return glock_wait_table + hash_32(hash, GLOCK_WAIT_TABLE_BITS);
 }
@@ -140,6 +137,7 @@ void gfs2_glock_free(struct gfs2_glock *gl)
 {
 	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 
+	BUG_ON(atomic_read(&gl->gl_revokes));
 	rhashtable_remove_fast(&gl_hash_table, &gl->gl_node, ht_parms);
 	smp_mb();
 	wake_up_glock(gl);
@@ -183,15 +181,19 @@ static int demote_ok(const struct gfs2_glock *gl)
 
 void gfs2_glock_add_to_lru(struct gfs2_glock *gl)
 {
+	if (!(gl->gl_ops->go_flags & GLOF_LRU))
+		return;
+
 	spin_lock(&lru_lock);
 
-	if (!list_empty(&gl->gl_lru))
-		list_del_init(&gl->gl_lru);
-	else
+	list_del(&gl->gl_lru);
+	list_add_tail(&gl->gl_lru, &lru_list);
+
+	if (!test_bit(GLF_LRU, &gl->gl_flags)) {
+		set_bit(GLF_LRU, &gl->gl_flags);
 		atomic_inc(&lru_count);
+	}
 
-	list_add_tail(&gl->gl_lru, &lru_list);
-	set_bit(GLF_LRU, &gl->gl_flags);
 	spin_unlock(&lru_lock);
 }
 
@@ -201,7 +203,7 @@ static void gfs2_glock_remove_from_lru(struct gfs2_glock *gl)
 		return;
 
 	spin_lock(&lru_lock);
-	if (!list_empty(&gl->gl_lru)) {
+	if (test_bit(GLF_LRU, &gl->gl_flags)) {
 		list_del_init(&gl->gl_lru);
 		atomic_dec(&lru_count);
 		clear_bit(GLF_LRU, &gl->gl_flags);
@@ -542,7 +544,7 @@ __acquires(&gl->gl_lockref.lock)
 	unsigned int lck_flags = (unsigned int)(gh ? gh->gh_flags : 0);
 	int ret;
 
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) &&
+	if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) &&
 	    target != LM_ST_UNLOCKED)
 		return;
 	lck_flags &= (LM_FLAG_TRY | LM_FLAG_TRY_1CB | LM_FLAG_NOEXP |
@@ -579,7 +581,7 @@ __acquires(&gl->gl_lockref.lock)
 		}
 		else if (ret) {
 			fs_err(sdp, "lm_lock ret %d\n", ret);
-			GLOCK_BUG_ON(gl, !test_bit(SDF_SHUTDOWN,
+			GLOCK_BUG_ON(gl, !test_bit(SDF_WITHDRAWN,
 						   &sdp->sd_flags));
 		}
 	} else { /* lock_nolock */
@@ -679,7 +681,7 @@ static void delete_work_func(struct work_struct *work)
 		goto out;
 
 	inode = gfs2_lookup_by_inum(sdp, no_addr, NULL, GFS2_BLKST_UNLINKED);
-	if (inode && !IS_ERR(inode)) {
+	if (!IS_ERR_OR_NULL(inode)) {
 		d_prune_aliases(inode);
 		iput(inode);
 	}
@@ -1073,7 +1075,7 @@ trap_recursive:
 	fs_err(sdp, "pid: %d\n", pid_nr(gh->gh_owner_pid));
 	fs_err(sdp, "lock type: %d req lock state : %d\n",
 	       gh->gh_gl->gl_name.ln_type, gh->gh_state);
-	gfs2_dump_glock(NULL, gl);
+	gfs2_dump_glock(NULL, gl, true);
 	BUG();
 }
 
@@ -1092,7 +1094,7 @@ int gfs2_glock_nq(struct gfs2_holder *gh)
 	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 	int error = 0;
 
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+	if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags)))
 		return -EIO;
 
 	if (test_bit(GLF_LRU, &gl->gl_flags))
@@ -1159,8 +1161,7 @@ void gfs2_glock_dq(struct gfs2_holder *gh)
 		    !test_bit(GLF_DEMOTE, &gl->gl_flags))
 			fast_path = 1;
 	}
-	if (!test_bit(GLF_LFLUSH, &gl->gl_flags) && demote_ok(gl) &&
-	    (glops->go_flags & GLOF_LRU))
+	if (!test_bit(GLF_LFLUSH, &gl->gl_flags) && demote_ok(gl))
 		gfs2_glock_add_to_lru(gl);
 
 	trace_gfs2_glock_queue(gh, 0);
@@ -1456,6 +1457,7 @@ __acquires(&lru_lock)
 		if (!spin_trylock(&gl->gl_lockref.lock)) {
 add_back_to_lru:
 			list_add(&gl->gl_lru, &lru_list);
+			set_bit(GLF_LRU, &gl->gl_flags);
 			atomic_inc(&lru_count);
 			continue;
 		}
@@ -1463,7 +1465,6 @@ add_back_to_lru:
 			spin_unlock(&gl->gl_lockref.lock);
 			goto add_back_to_lru;
 		}
-		clear_bit(GLF_LRU, &gl->gl_flags);
 		gl->gl_lockref.count++;
 		if (demote_ok(gl))
 			handle_callback(gl, LM_ST_UNLOCKED, 0, false);
@@ -1498,6 +1499,7 @@ static long gfs2_scan_glock_lru(int nr)
 		if (!test_bit(GLF_LOCK, &gl->gl_flags)) {
 			list_move(&gl->gl_lru, &dispose);
 			atomic_dec(&lru_count);
+			clear_bit(GLF_LRU, &gl->gl_flags);
 			freed++;
 			continue;
 		}
@@ -1608,16 +1610,16 @@ void gfs2_glock_thaw(struct gfs2_sbd *sdp)
 	glock_hash_walk(thaw_glock, sdp);
 }
 
-static void dump_glock(struct seq_file *seq, struct gfs2_glock *gl)
+static void dump_glock(struct seq_file *seq, struct gfs2_glock *gl, bool fsid)
 {
 	spin_lock(&gl->gl_lockref.lock);
-	gfs2_dump_glock(seq, gl);
+	gfs2_dump_glock(seq, gl, fsid);
 	spin_unlock(&gl->gl_lockref.lock);
 }
 
 static void dump_glock_func(struct gfs2_glock *gl)
 {
-	dump_glock(NULL, gl);
+	dump_glock(NULL, gl, true);
 }
 
 /**
@@ -1702,10 +1704,12 @@ static const char *hflags2str(char *buf, u16 flags, unsigned long iflags)
  * dump_holder - print information about a glock holder
  * @seq: the seq_file struct
  * @gh: the glock holder
+ * @fs_id_buf: pointer to file system id (if requested)
  *
  */
 
-static void dump_holder(struct seq_file *seq, const struct gfs2_holder *gh)
+static void dump_holder(struct seq_file *seq, const struct gfs2_holder *gh,
+			const char *fs_id_buf)
 {
 	struct task_struct *gh_owner = NULL;
 	char flags_buf[32];
@@ -1713,8 +1717,8 @@ static void dump_holder(struct seq_file *seq, const struct gfs2_holder *gh)
 	rcu_read_lock();
 	if (gh->gh_owner_pid)
 		gh_owner = pid_task(gh->gh_owner_pid, PIDTYPE_PID);
-	gfs2_print_dbg(seq, " H: s:%s f:%s e:%d p:%ld [%s] %pS\n",
-		       state2str(gh->gh_state),
+	gfs2_print_dbg(seq, "%s H: s:%s f:%s e:%d p:%ld [%s] %pS\n",
+		       fs_id_buf, state2str(gh->gh_state),
 		       hflags2str(flags_buf, gh->gh_flags, gh->gh_iflags),
 		       gh->gh_error,
 		       gh->gh_owner_pid ? (long)pid_nr(gh->gh_owner_pid) : -1,
@@ -1764,6 +1768,7 @@ static const char *gflags2str(char *buf, const struct gfs2_glock *gl)
  * gfs2_dump_glock - print information about a glock
  * @seq: The seq_file struct
  * @gl: the glock
+ * @fsid: If true, also dump the file system id
  *
  * The file format is as follows:
  * One line per object, capital letters are used to indicate objects
@@ -1777,19 +1782,24 @@ static const char *gflags2str(char *buf, const struct gfs2_glock *gl)
  *
  */
 
-void gfs2_dump_glock(struct seq_file *seq, struct gfs2_glock *gl)
+void gfs2_dump_glock(struct seq_file *seq, struct gfs2_glock *gl, bool fsid)
 {
 	const struct gfs2_glock_operations *glops = gl->gl_ops;
 	unsigned long long dtime;
 	const struct gfs2_holder *gh;
 	char gflags_buf[32];
+	char fs_id_buf[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
+	struct gfs2_sbd *sdp = gl->gl_name.ln_sbd;
 
+	memset(fs_id_buf, 0, sizeof(fs_id_buf));
+	if (fsid && sdp) /* safety precaution */
+		sprintf(fs_id_buf, "fsid=%s: ", sdp->sd_fsname);
 	dtime = jiffies - gl->gl_demote_time;
 	dtime *= 1000000/HZ; /* demote time in uSec */
 	if (!test_bit(GLF_DEMOTE, &gl->gl_flags))
 		dtime = 0;
-	gfs2_print_dbg(seq, "G:  s:%s n:%u/%llx f:%s t:%s d:%s/%llu a:%d v:%d r:%d m:%ld\n",
-		  state2str(gl->gl_state),
+	gfs2_print_dbg(seq, "%sG:  s:%s n:%u/%llx f:%s t:%s d:%s/%llu a:%d "
+		       "v:%d r:%d m:%ld\n", fs_id_buf, state2str(gl->gl_state),
 		  gl->gl_name.ln_type,
 		  (unsigned long long)gl->gl_name.ln_number,
 		  gflags2str(gflags_buf, gl),
@@ -1800,10 +1810,10 @@ void gfs2_dump_glock(struct seq_file *seq, struct gfs2_glock *gl)
 		  (int)gl->gl_lockref.count, gl->gl_hold_time);
 
 	list_for_each_entry(gh, &gl->gl_holders, gh_list)
-		dump_holder(seq, gh);
+		dump_holder(seq, gh, fs_id_buf);
 
 	if (gl->gl_state != LM_ST_UNLOCKED && glops->go_dump)
-		glops->go_dump(seq, gl);
+		glops->go_dump(seq, gl, fs_id_buf);
 }
 
 static int gfs2_glstats_seq_show(struct seq_file *seq, void *iter_ptr)
@@ -2004,7 +2014,7 @@ static void gfs2_glock_seq_stop(struct seq_file *seq, void *iter_ptr)
 
 static int gfs2_glock_seq_show(struct seq_file *seq, void *iter_ptr)
 {
-	dump_glock(seq, iter_ptr);
+	dump_glock(seq, iter_ptr, false);
 	return 0;
 }
 
@@ -2131,71 +2141,29 @@ static const struct file_operations gfs2_sbstats_fops = {
 	.release = seq_release,
 };
 
-int gfs2_create_debugfs_file(struct gfs2_sbd *sdp)
-{
-	struct dentry *dent;
-
-	dent = debugfs_create_dir(sdp->sd_table_name, gfs2_root);
-	if (IS_ERR_OR_NULL(dent))
-		goto fail;
-	sdp->debugfs_dir = dent;
-
-	dent = debugfs_create_file("glocks",
-				   S_IFREG | S_IRUGO,
-				   sdp->debugfs_dir, sdp,
-				   &gfs2_glocks_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto fail;
-	sdp->debugfs_dentry_glocks = dent;
-
-	dent = debugfs_create_file("glstats",
-				   S_IFREG | S_IRUGO,
-				   sdp->debugfs_dir, sdp,
-				   &gfs2_glstats_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto fail;
-	sdp->debugfs_dentry_glstats = dent;
-
-	dent = debugfs_create_file("sbstats",
-				   S_IFREG | S_IRUGO,
-				   sdp->debugfs_dir, sdp,
-				   &gfs2_sbstats_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto fail;
-	sdp->debugfs_dentry_sbstats = dent;
+void gfs2_create_debugfs_file(struct gfs2_sbd *sdp)
+{
+	sdp->debugfs_dir = debugfs_create_dir(sdp->sd_table_name, gfs2_root);
 
-	return 0;
-fail:
-	gfs2_delete_debugfs_file(sdp);
-	return dent ? PTR_ERR(dent) : -ENOMEM;
+	debugfs_create_file("glocks", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp,
+			    &gfs2_glocks_fops);
+
+	debugfs_create_file("glstats", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp,
+			    &gfs2_glstats_fops);
+
+	debugfs_create_file("sbstats", S_IFREG | S_IRUGO, sdp->debugfs_dir, sdp,
+			    &gfs2_sbstats_fops);
 }
 
 void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp)
 {
-	if (sdp->debugfs_dir) {
-		if (sdp->debugfs_dentry_glocks) {
-			debugfs_remove(sdp->debugfs_dentry_glocks);
-			sdp->debugfs_dentry_glocks = NULL;
-		}
-		if (sdp->debugfs_dentry_glstats) {
-			debugfs_remove(sdp->debugfs_dentry_glstats);
-			sdp->debugfs_dentry_glstats = NULL;
-		}
-		if (sdp->debugfs_dentry_sbstats) {
-			debugfs_remove(sdp->debugfs_dentry_sbstats);
-			sdp->debugfs_dentry_sbstats = NULL;
-		}
-		debugfs_remove(sdp->debugfs_dir);
-		sdp->debugfs_dir = NULL;
-	}
+	debugfs_remove_recursive(sdp->debugfs_dir);
+	sdp->debugfs_dir = NULL;
 }
 
-int gfs2_register_debugfs(void)
+void gfs2_register_debugfs(void)
 {
 	gfs2_root = debugfs_create_dir("gfs2", NULL);
-	if (IS_ERR(gfs2_root))
-		return PTR_ERR(gfs2_root);
-	return gfs2_root ? 0 : -ENOMEM;
 }
 
 void gfs2_unregister_debugfs(void)
diff --git a/fs/gfs2/glock.h b/fs/gfs2/glock.h
index 8949bf28b249..e4e0bed5257c 100644
--- a/fs/gfs2/glock.h
+++ b/fs/gfs2/glock.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __GLOCK_DOT_H__
@@ -202,8 +199,11 @@ extern int gfs2_glock_nq_num(struct gfs2_sbd *sdp, u64 number,
 			     struct gfs2_holder *gh);
 extern int gfs2_glock_nq_m(unsigned int num_gh, struct gfs2_holder *ghs);
 extern void gfs2_glock_dq_m(unsigned int num_gh, struct gfs2_holder *ghs);
-extern void gfs2_dump_glock(struct seq_file *seq, struct gfs2_glock *gl);
-#define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) { gfs2_dump_glock(NULL, gl); BUG(); } } while(0)
+extern void gfs2_dump_glock(struct seq_file *seq, struct gfs2_glock *gl,
+			    bool fsid);
+#define GLOCK_BUG_ON(gl,x) do { if (unlikely(x)) {		\
+			gfs2_dump_glock(NULL, gl, true);	\
+			BUG(); } } while(0)
 extern __printf(2, 3)
 void gfs2_print_dbg(struct seq_file *seq, const char *fmt, ...);
 
@@ -243,9 +243,9 @@ extern void gfs2_glock_free(struct gfs2_glock *gl);
 extern int __init gfs2_glock_init(void);
 extern void gfs2_glock_exit(void);
 
-extern int gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
+extern void gfs2_create_debugfs_file(struct gfs2_sbd *sdp);
 extern void gfs2_delete_debugfs_file(struct gfs2_sbd *sdp);
-extern int gfs2_register_debugfs(void);
+extern void gfs2_register_debugfs(void);
 extern void gfs2_unregister_debugfs(void);
 
 extern const struct lm_lockops gfs2_dlm_ops;
@@ -269,7 +269,7 @@ static inline void glock_set_object(struct gfs2_glock *gl, void *object)
 {
 	spin_lock(&gl->gl_lockref.lock);
 	if (gfs2_assert_warn(gl->gl_name.ln_sbd, gl->gl_object == NULL))
-		gfs2_dump_glock(NULL, gl);
+		gfs2_dump_glock(NULL, gl, true);
 	gl->gl_object = object;
 	spin_unlock(&gl->gl_lockref.lock);
 }
@@ -281,7 +281,7 @@ static inline void glock_set_object(struct gfs2_glock *gl, void *object)
  *
  * I'd love to similarly add this:
  *	else if (gfs2_assert_warn(gl->gl_sbd, gl->gl_object == object))
- *		gfs2_dump_glock(NULL, gl);
+ *		gfs2_dump_glock(NULL, gl, true);
  * Unfortunately, that's not possible because as soon as gfs2_delete_inode
  * frees the block in the rgrp, another process can reassign it for an I_NEW
  * inode in gfs2_create_inode because that calls new_inode, not gfs2_iget.
diff --git a/fs/gfs2/glops.c b/fs/gfs2/glops.c
index 78510ab91835..ff213690e364 100644
--- a/fs/gfs2/glops.c
+++ b/fs/gfs2/glops.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/spinlock.h>
@@ -28,6 +25,7 @@
 #include "util.h"
 #include "trans.h"
 #include "dir.h"
+#include "lops.h"
 
 struct workqueue_struct *gfs2_freeze_wq;
 
@@ -463,10 +461,12 @@ static int inode_go_lock(struct gfs2_holder *gh)
  * inode_go_dump - print information about an inode
  * @seq: The iterator
  * @ip: the inode
+ * @fs_id_buf: file system id (may be empty)
  *
  */
 
-static void inode_go_dump(struct seq_file *seq, struct gfs2_glock *gl)
+static void inode_go_dump(struct seq_file *seq, struct gfs2_glock *gl,
+			  const char *fs_id_buf)
 {
 	struct gfs2_inode *ip = gl->gl_object;
 	struct inode *inode = &ip->i_inode;
@@ -479,7 +479,8 @@ static void inode_go_dump(struct seq_file *seq, struct gfs2_glock *gl)
 	nrpages = inode->i_data.nrpages;
 	xa_unlock_irq(&inode->i_data.i_pages);
 
-	gfs2_print_dbg(seq, " I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu p:%lu\n",
+	gfs2_print_dbg(seq, "%s I: n:%llu/%llu t:%u f:0x%02lx d:0x%08x s:%llu "
+		       "p:%lu\n", fs_id_buf,
 		  (unsigned long long)ip->i_no_formal_ino,
 		  (unsigned long long)ip->i_no_addr,
 		  IF2DT(ip->i_inode.i_mode), ip->i_flags,
@@ -505,7 +506,8 @@ static void freeze_go_sync(struct gfs2_glock *gl)
 		atomic_set(&sdp->sd_freeze_state, SFS_STARTING_FREEZE);
 		error = freeze_super(sdp->sd_vfs);
 		if (error) {
-			printk(KERN_INFO "GFS2: couldn't freeze filesystem: %d\n", error);
+			fs_info(sdp, "GFS2: couldn't freeze filesystem: %d\n",
+				error);
 			gfs2_assert_withdraw(sdp, 0);
 		}
 		queue_work(gfs2_freeze_wq, &sdp->sd_freeze_work);
@@ -531,14 +533,14 @@ static int freeze_go_xmote_bh(struct gfs2_glock *gl, struct gfs2_holder *gh)
 	if (test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags)) {
 		j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 
-		error = gfs2_find_jhead(sdp->sd_jdesc, &head);
+		error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
 		if (error)
 			gfs2_consist(sdp);
 		if (!(head.lh_flags & GFS2_LOG_HEAD_UNMOUNT))
 			gfs2_consist(sdp);
 
 		/*  Initialize some head of the log stuff  */
-		if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
+		if (!test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) {
 			sdp->sd_log_sequence = head.lh_sequence + 1;
 			gfs2_log_pointers_init(sdp, head.lh_blkno);
 		}
diff --git a/fs/gfs2/glops.h b/fs/gfs2/glops.h
index 8ed1857c1a8d..2dd192e85618 100644
--- a/fs/gfs2/glops.h
+++ b/fs/gfs2/glops.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __GLOPS_DOT_H__
diff --git a/fs/gfs2/incore.h b/fs/gfs2/incore.h
index e10e0b0a7cd5..7a993d7c022e 100644
--- a/fs/gfs2/incore.h
+++ b/fs/gfs2/incore.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __INCORE_DOT_H__
@@ -243,7 +240,8 @@ struct gfs2_glock_operations {
 	int (*go_demote_ok) (const struct gfs2_glock *gl);
 	int (*go_lock) (struct gfs2_holder *gh);
 	void (*go_unlock) (struct gfs2_holder *gh);
-	void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl);
+	void (*go_dump)(struct seq_file *seq, struct gfs2_glock *gl,
+			const char *fs_id_buf);
 	void (*go_callback)(struct gfs2_glock *gl, bool remote);
 	const int go_type;
 	const unsigned long go_flags;
@@ -507,7 +505,6 @@ struct gfs2_trans {
 	unsigned int tr_num_buf_rm;
 	unsigned int tr_num_databuf_rm;
 	unsigned int tr_num_revoke;
-	unsigned int tr_num_revoke_rm;
 
 	struct list_head tr_list;
 	struct list_head tr_databuf;
@@ -535,7 +532,7 @@ struct gfs2_jdesc {
 	unsigned long jd_flags;
 #define JDF_RECOVERY 1
 	unsigned int jd_jid;
-	unsigned int jd_blocks;
+	u32 jd_blocks;
 	int jd_recover_error;
 	/* Replay stuff */
 
@@ -612,7 +609,7 @@ struct gfs2_tune {
 enum {
 	SDF_JOURNAL_CHECKED	= 0,
 	SDF_JOURNAL_LIVE	= 1,
-	SDF_SHUTDOWN		= 2,
+	SDF_WITHDRAWN		= 2,
 	SDF_NOBARRIERS		= 3,
 	SDF_NORECOVERY		= 4,
 	SDF_DEMOTE		= 5,
@@ -621,6 +618,7 @@ enum {
 	SDF_SKIP_DLM_UNLOCK	= 8,
 	SDF_FORCE_AIL_FLUSH     = 9,
 	SDF_AIL1_IO_ERROR	= 10,
+	SDF_FS_FROZEN           = 11,
 };
 
 enum gfs2_freeze_state {
@@ -809,8 +807,8 @@ struct gfs2_sbd {
 	atomic_t sd_log_pinned;
 	unsigned int sd_log_num_revoke;
 
-	struct list_head sd_log_le_revoke;
-	struct list_head sd_log_le_ordered;
+	struct list_head sd_log_revokes;
+	struct list_head sd_log_ordered;
 	spinlock_t sd_ordered_lock;
 
 	atomic_t sd_log_thresh1;
@@ -853,9 +851,6 @@ struct gfs2_sbd {
 
 	unsigned long sd_last_warning;
 	struct dentry *debugfs_dir;    /* debugfs directory */
-	struct dentry *debugfs_dentry_glocks;
-	struct dentry *debugfs_dentry_glstats;
-	struct dentry *debugfs_dentry_sbstats;
 };
 
 static inline void gfs2_glstats_inc(struct gfs2_glock *gl, int which)
diff --git a/fs/gfs2/inode.c b/fs/gfs2/inode.c
index 998051c4aea7..2e2a8a2fb51d 100644
--- a/fs/gfs2/inode.c
+++ b/fs/gfs2/inode.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2011 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/slab.h>
@@ -796,7 +793,7 @@ fail_free_acls:
 fail_gunlock:
 	gfs2_dir_no_add(&da);
 	gfs2_glock_dq_uninit(ghs);
-	if (inode && !IS_ERR(inode)) {
+	if (!IS_ERR_OR_NULL(inode)) {
 		clear_nlink(inode);
 		if (!free_vfs_inode)
 			mark_inode_dirty(inode);
diff --git a/fs/gfs2/inode.h b/fs/gfs2/inode.h
index 793808263c6d..580adbf0b5e1 100644
--- a/fs/gfs2/inode.h
+++ b/fs/gfs2/inode.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __INODE_DOT_H__
@@ -59,8 +56,8 @@ static inline u64 gfs2_get_inode_blocks(const struct inode *inode)
 
 static inline void gfs2_add_inode_blocks(struct inode *inode, s64 change)
 {
-	gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks > -change));
-	change *= (GFS2_SB(inode)->sd_sb.sb_bsize/GFS2_BASIC_BLOCK);
+	change <<= inode->i_blkbits - GFS2_BASIC_BLOCK_SHIFT;
+	gfs2_assert(GFS2_SB(inode), (change >= 0 || inode->i_blocks >= -change));
 	inode->i_blocks += change;
 }
 
diff --git a/fs/gfs2/lock_dlm.c b/fs/gfs2/lock_dlm.c
index 31df26ed7854..4361804646d8 100644
--- a/fs/gfs2/lock_dlm.c
+++ b/fs/gfs2/lock_dlm.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright 2004-2011 Red Hat, Inc.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -31,9 +28,10 @@
  * @delta is the difference between the current rtt sample and the
  * running average srtt. We add 1/8 of that to the srtt in order to
  * update the current srtt estimate. The variance estimate is a bit
- * more complicated. We subtract the abs value of the @delta from
- * the current variance estimate and add 1/4 of that to the running
- * total.
+ * more complicated. We subtract the current variance estimate from
+ * the abs value of the @delta and add 1/4 of that to the running
+ * total.  That's equivalent to 3/4 of the current variance
+ * estimate plus 1/4 of the abs of @delta.
  *
  * Note that the index points at the array entry containing the smoothed
  * mean value, and the variance is always in the following entry
@@ -49,7 +47,7 @@ static inline void gfs2_update_stats(struct gfs2_lkstats *s, unsigned index,
 	s64 delta = sample - s->stats[index];
 	s->stats[index] += (delta >> 3);
 	index++;
-	s->stats[index] += ((abs(delta) - s->stats[index]) >> 2);
+	s->stats[index] += (s64)(abs(delta) - s->stats[index]) >> 2;
 }
 
 /**
diff --git a/fs/gfs2/log.c b/fs/gfs2/log.c
index b8830fda51e8..58e237fba565 100644
--- a/fs/gfs2/log.c
+++ b/fs/gfs2/log.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/sched.h>
@@ -551,9 +548,9 @@ static void gfs2_ordered_write(struct gfs2_sbd *sdp)
 	LIST_HEAD(written);
 
 	spin_lock(&sdp->sd_ordered_lock);
-	list_sort(NULL, &sdp->sd_log_le_ordered, &ip_cmp);
-	while (!list_empty(&sdp->sd_log_le_ordered)) {
-		ip = list_entry(sdp->sd_log_le_ordered.next, struct gfs2_inode, i_ordered);
+	list_sort(NULL, &sdp->sd_log_ordered, &ip_cmp);
+	while (!list_empty(&sdp->sd_log_ordered)) {
+		ip = list_entry(sdp->sd_log_ordered.next, struct gfs2_inode, i_ordered);
 		if (ip->i_inode.i_mapping->nrpages == 0) {
 			test_and_clear_bit(GIF_ORDERED, &ip->i_flags);
 			list_del(&ip->i_ordered);
@@ -564,7 +561,7 @@ static void gfs2_ordered_write(struct gfs2_sbd *sdp)
 		filemap_fdatawrite(ip->i_inode.i_mapping);
 		spin_lock(&sdp->sd_ordered_lock);
 	}
-	list_splice(&written, &sdp->sd_log_le_ordered);
+	list_splice(&written, &sdp->sd_log_ordered);
 	spin_unlock(&sdp->sd_ordered_lock);
 }
 
@@ -573,8 +570,8 @@ static void gfs2_ordered_wait(struct gfs2_sbd *sdp)
 	struct gfs2_inode *ip;
 
 	spin_lock(&sdp->sd_ordered_lock);
-	while (!list_empty(&sdp->sd_log_le_ordered)) {
-		ip = list_entry(sdp->sd_log_le_ordered.next, struct gfs2_inode, i_ordered);
+	while (!list_empty(&sdp->sd_log_ordered)) {
+		ip = list_entry(sdp->sd_log_ordered.next, struct gfs2_inode, i_ordered);
 		list_del(&ip->i_ordered);
 		WARN_ON(!test_and_clear_bit(GIF_ORDERED, &ip->i_flags));
 		if (ip->i_inode.i_mapping->nrpages == 0)
@@ -606,9 +603,10 @@ void gfs2_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
 	gfs2_remove_from_ail(bd); /* drops ref on bh */
 	bd->bd_bh = NULL;
 	sdp->sd_log_num_revoke++;
-	atomic_inc(&gl->gl_revokes);
+	if (atomic_inc_return(&gl->gl_revokes) == 1)
+		gfs2_glock_hold(gl);
 	set_bit(GLF_LFLUSH, &gl->gl_flags);
-	list_add(&bd->bd_list, &sdp->sd_log_le_revoke);
+	list_add(&bd->bd_list, &sdp->sd_log_revokes);
 }
 
 void gfs2_write_revokes(struct gfs2_sbd *sdp)
@@ -666,11 +664,12 @@ out_of_blocks:
 }
 
 /**
- * write_log_header - Write a journal log header buffer at sd_log_flush_head
+ * gfs2_write_log_header - Write a journal log header buffer at lblock
  * @sdp: The GFS2 superblock
  * @jd: journal descriptor of the journal to which we are writing
  * @seq: sequence number
  * @tail: tail of the log
+ * @lblock: value for lh_blkno (block number relative to start of journal)
  * @flags: log header flags GFS2_LOG_HEAD_*
  * @op_flags: flags to pass to the bio
  *
@@ -678,7 +677,8 @@ out_of_blocks:
  */
 
 void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
-			   u64 seq, u32 tail, u32 flags, int op_flags)
+			   u64 seq, u32 tail, u32 lblock, u32 flags,
+			   int op_flags)
 {
 	struct gfs2_log_header *lh;
 	u32 hash, crc;
@@ -686,7 +686,7 @@ void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
 	struct gfs2_statfs_change_host *l_sc = &sdp->sd_statfs_local;
 	struct timespec64 tv;
 	struct super_block *sb = sdp->sd_vfs;
-	u64 addr;
+	u64 dblock;
 
 	lh = page_address(page);
 	clear_page(lh);
@@ -699,15 +699,21 @@ void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
 	lh->lh_sequence = cpu_to_be64(seq);
 	lh->lh_flags = cpu_to_be32(flags);
 	lh->lh_tail = cpu_to_be32(tail);
-	lh->lh_blkno = cpu_to_be32(sdp->sd_log_flush_head);
+	lh->lh_blkno = cpu_to_be32(lblock);
 	hash = ~crc32(~0, lh, LH_V1_SIZE);
 	lh->lh_hash = cpu_to_be32(hash);
 
 	ktime_get_coarse_real_ts64(&tv);
 	lh->lh_nsec = cpu_to_be32(tv.tv_nsec);
 	lh->lh_sec = cpu_to_be64(tv.tv_sec);
-	addr = gfs2_log_bmap(sdp);
-	lh->lh_addr = cpu_to_be64(addr);
+	if (!list_empty(&jd->extent_list))
+		dblock = gfs2_log_bmap(sdp);
+	else {
+		int ret = gfs2_lblk_to_dblk(jd->jd_inode, lblock, &dblock);
+		if (gfs2_assert_withdraw(sdp, ret == 0))
+			return;
+	}
+	lh->lh_addr = cpu_to_be64(dblock);
 	lh->lh_jinode = cpu_to_be64(GFS2_I(jd->jd_inode)->i_no_addr);
 
 	/* We may only write local statfs, quota, etc., when writing to our
@@ -732,8 +738,8 @@ void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
 		     sb->s_blocksize - LH_V1_SIZE - 4);
 	lh->lh_crc = cpu_to_be32(crc);
 
-	gfs2_log_write(sdp, page, sb->s_blocksize, 0, addr);
-	gfs2_log_submit_bio(&sdp->sd_log_bio, REQ_OP_WRITE, op_flags);
+	gfs2_log_write(sdp, page, sb->s_blocksize, 0, dblock);
+	gfs2_log_submit_bio(&sdp->sd_log_bio, REQ_OP_WRITE | op_flags);
 	log_flush_wait(sdp);
 }
 
@@ -761,7 +767,7 @@ static void log_write_header(struct gfs2_sbd *sdp, u32 flags)
 	}
 	sdp->sd_log_idle = (tail == sdp->sd_log_flush_head);
 	gfs2_write_log_header(sdp, sdp->sd_jdesc, sdp->sd_log_sequence++, tail,
-			      flags, op_flags);
+			      sdp->sd_log_flush_head, flags, op_flags);
 
 	if (sdp->sd_log_tail != tail)
 		log_pull_tail(sdp, tail);
@@ -810,7 +816,7 @@ void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl, u32 flags)
 
 	gfs2_ordered_write(sdp);
 	lops_before_commit(sdp, tr);
-	gfs2_log_submit_bio(&sdp->sd_log_bio, REQ_OP_WRITE, 0);
+	gfs2_log_submit_bio(&sdp->sd_log_bio, REQ_OP_WRITE);
 
 	if (sdp->sd_log_head != sdp->sd_log_flush_head) {
 		log_flush_wait(sdp);
@@ -876,7 +882,6 @@ static void gfs2_merge_trans(struct gfs2_trans *old, struct gfs2_trans *new)
 	old->tr_num_buf_rm	+= new->tr_num_buf_rm;
 	old->tr_num_databuf_rm	+= new->tr_num_databuf_rm;
 	old->tr_num_revoke	+= new->tr_num_revoke;
-	old->tr_num_revoke_rm	+= new->tr_num_revoke_rm;
 
 	list_splice_tail_init(&new->tr_databuf, &old->tr_databuf);
 	list_splice_tail_init(&new->tr_buf, &old->tr_buf);
@@ -898,7 +903,7 @@ static void log_refund(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 		set_bit(TR_ATTACHED, &tr->tr_flags);
 	}
 
-	sdp->sd_log_commited_revoke += tr->tr_num_revoke - tr->tr_num_revoke_rm;
+	sdp->sd_log_commited_revoke += tr->tr_num_revoke;
 	reserved = calc_reserved(sdp);
 	maxres = sdp->sd_log_blks_reserved + tr->tr_reserved;
 	gfs2_assert_withdraw(sdp, maxres >= reserved);
diff --git a/fs/gfs2/log.h b/fs/gfs2/log.h
index 1bc9bd444b28..2315fca47a2b 100644
--- a/fs/gfs2/log.h
+++ b/fs/gfs2/log.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __LOG_DOT_H__
@@ -59,7 +56,7 @@ static inline void gfs2_ordered_add_inode(struct gfs2_inode *ip)
 	if (!test_bit(GIF_ORDERED, &ip->i_flags)) {
 		spin_lock(&sdp->sd_ordered_lock);
 		if (!test_and_set_bit(GIF_ORDERED, &ip->i_flags))
-			list_add(&ip->i_ordered, &sdp->sd_log_le_ordered);
+			list_add(&ip->i_ordered, &sdp->sd_log_ordered);
 		spin_unlock(&sdp->sd_ordered_lock);
 	}
 }
@@ -70,7 +67,8 @@ extern unsigned int gfs2_struct2blk(struct gfs2_sbd *sdp, unsigned int nstruct,
 extern void gfs2_log_release(struct gfs2_sbd *sdp, unsigned int blks);
 extern int gfs2_log_reserve(struct gfs2_sbd *sdp, unsigned int blks);
 extern void gfs2_write_log_header(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd,
-				  u64 seq, u32 tail, u32 flags, int op_flags);
+				  u64 seq, u32 tail, u32 lblock, u32 flags,
+				  int op_flags);
 extern void gfs2_log_flush(struct gfs2_sbd *sdp, struct gfs2_glock *gl,
 			   u32 type);
 extern void gfs2_log_commit(struct gfs2_sbd *sdp, struct gfs2_trans *trans);
diff --git a/fs/gfs2/lops.c b/fs/gfs2/lops.c
index 2295042bc625..5b17979af539 100644
--- a/fs/gfs2/lops.c
+++ b/fs/gfs2/lops.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/sched.h>
@@ -17,7 +14,9 @@
 #include <linux/bio.h>
 #include <linux/fs.h>
 #include <linux/list_sort.h>
+#include <linux/blkdev.h>
 
+#include "bmap.h"
 #include "dir.h"
 #include "gfs2.h"
 #include "incore.h"
@@ -168,7 +167,8 @@ u64 gfs2_log_bmap(struct gfs2_sbd *sdp)
  * that is pinned in the pagecache.
  */
 
-static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, struct bio_vec *bvec,
+static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp,
+				  struct bio_vec *bvec,
 				  blk_status_t error)
 {
 	struct buffer_head *bh, *next;
@@ -193,7 +193,6 @@ static void gfs2_end_log_write_bh(struct gfs2_sbd *sdp, struct bio_vec *bvec,
 /**
  * gfs2_end_log_write - end of i/o to the log
  * @bio: The bio
- * @error: Status of i/o request
  *
  * Each bio_vec contains either data from the pagecache or data
  * relating to the log itself. Here we iterate over the bio_vec
@@ -206,7 +205,7 @@ static void gfs2_end_log_write(struct bio *bio)
 	struct gfs2_sbd *sdp = bio->bi_private;
 	struct bio_vec *bvec;
 	struct page *page;
-	int i;
+	struct bvec_iter_all iter_all;
 
 	if (bio->bi_status) {
 		fs_err(sdp, "Error %d writing to journal, jid=%u\n",
@@ -214,7 +213,7 @@ static void gfs2_end_log_write(struct bio *bio)
 		wake_up(&sdp->sd_logd_waitq);
 	}
 
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 		page = bvec->bv_page;
 		if (page_has_buffers(page))
 			gfs2_end_log_write_bh(sdp, bvec, bio->bi_status);
@@ -230,20 +229,19 @@ static void gfs2_end_log_write(struct bio *bio)
 /**
  * gfs2_log_submit_bio - Submit any pending log bio
  * @biop: Address of the bio pointer
- * @op: REQ_OP
- * @op_flags: req_flag_bits
+ * @opf: REQ_OP | op_flags
  *
  * Submit any pending part-built or full bio to the block device. If
  * there is no pending bio, then this is a no-op.
  */
 
-void gfs2_log_submit_bio(struct bio **biop, int op, int op_flags)
+void gfs2_log_submit_bio(struct bio **biop, int opf)
 {
 	struct bio *bio = *biop;
 	if (bio) {
 		struct gfs2_sbd *sdp = bio->bi_private;
 		atomic_inc(&sdp->sd_log_in_flight);
-		bio_set_op_attrs(bio, op, op_flags);
+		bio->bi_opf = opf;
 		submit_bio(bio);
 		*biop = NULL;
 	}
@@ -304,7 +302,7 @@ static struct bio *gfs2_log_get_bio(struct gfs2_sbd *sdp, u64 blkno,
 		nblk >>= sdp->sd_fsb2bb_shift;
 		if (blkno == nblk && !flush)
 			return bio;
-		gfs2_log_submit_bio(biop, op, 0);
+		gfs2_log_submit_bio(biop, op);
 	}
 
 	*biop = gfs2_log_alloc_bio(sdp, blkno, end_io);
@@ -375,6 +373,205 @@ void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page)
 		       gfs2_log_bmap(sdp));
 }
 
+/**
+ * gfs2_end_log_read - end I/O callback for reads from the log
+ * @bio: The bio
+ *
+ * Simply unlock the pages in the bio. The main thread will wait on them and
+ * process them in order as necessary.
+ */
+
+static void gfs2_end_log_read(struct bio *bio)
+{
+	struct page *page;
+	struct bio_vec *bvec;
+	struct bvec_iter_all iter_all;
+
+	bio_for_each_segment_all(bvec, bio, iter_all) {
+		page = bvec->bv_page;
+		if (bio->bi_status) {
+			int err = blk_status_to_errno(bio->bi_status);
+
+			SetPageError(page);
+			mapping_set_error(page->mapping, err);
+		}
+		unlock_page(page);
+	}
+
+	bio_put(bio);
+}
+
+/**
+ * gfs2_jhead_pg_srch - Look for the journal head in a given page.
+ * @jd: The journal descriptor
+ * @page: The page to look in
+ *
+ * Returns: 1 if found, 0 otherwise.
+ */
+
+static bool gfs2_jhead_pg_srch(struct gfs2_jdesc *jd,
+			      struct gfs2_log_header_host *head,
+			      struct page *page)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
+	struct gfs2_log_header_host uninitialized_var(lh);
+	void *kaddr = kmap_atomic(page);
+	unsigned int offset;
+	bool ret = false;
+
+	for (offset = 0; offset < PAGE_SIZE; offset += sdp->sd_sb.sb_bsize) {
+		if (!__get_log_header(sdp, kaddr + offset, 0, &lh)) {
+			if (lh.lh_sequence > head->lh_sequence)
+				*head = lh;
+			else {
+				ret = true;
+				break;
+			}
+		}
+	}
+	kunmap_atomic(kaddr);
+	return ret;
+}
+
+/**
+ * gfs2_jhead_process_page - Search/cleanup a page
+ * @jd: The journal descriptor
+ * @index: Index of the page to look into
+ * @done: If set, perform only cleanup, else search and set if found.
+ *
+ * Find the page with 'index' in the journal's mapping. Search the page for
+ * the journal head if requested (cleanup == false). Release refs on the
+ * page so the page cache can reclaim it (put_page() twice). We grabbed a
+ * reference on this page two times, first when we did a find_or_create_page()
+ * to obtain the page to add it to the bio and second when we do a
+ * find_get_page() here to get the page to wait on while I/O on it is being
+ * completed.
+ * This function is also used to free up a page we might've grabbed but not
+ * used. Maybe we added it to a bio, but not submitted it for I/O. Or we
+ * submitted the I/O, but we already found the jhead so we only need to drop
+ * our references to the page.
+ */
+
+static void gfs2_jhead_process_page(struct gfs2_jdesc *jd, unsigned long index,
+				    struct gfs2_log_header_host *head,
+				    bool *done)
+{
+	struct page *page;
+
+	page = find_get_page(jd->jd_inode->i_mapping, index);
+	wait_on_page_locked(page);
+
+	if (PageError(page))
+		*done = true;
+
+	if (!*done)
+		*done = gfs2_jhead_pg_srch(jd, head, page);
+
+	put_page(page); /* Once for find_get_page */
+	put_page(page); /* Once more for find_or_create_page */
+}
+
+/**
+ * gfs2_find_jhead - find the head of a log
+ * @jd: The journal descriptor
+ * @head: The log descriptor for the head of the log is returned here
+ *
+ * Do a search of a journal by reading it in large chunks using bios and find
+ * the valid log entry with the highest sequence number.  (i.e. the log head)
+ *
+ * Returns: 0 on success, errno otherwise
+ */
+int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head,
+		    bool keep_cache)
+{
+	struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
+	struct address_space *mapping = jd->jd_inode->i_mapping;
+	unsigned int block = 0, blocks_submitted = 0, blocks_read = 0;
+	unsigned int bsize = sdp->sd_sb.sb_bsize;
+	unsigned int bsize_shift = sdp->sd_sb.sb_bsize_shift;
+	unsigned int shift = PAGE_SHIFT - bsize_shift;
+	unsigned int readhead_blocks = BIO_MAX_PAGES << shift;
+	struct gfs2_journal_extent *je;
+	int sz, ret = 0;
+	struct bio *bio = NULL;
+	struct page *page = NULL;
+	bool done = false;
+	errseq_t since;
+
+	memset(head, 0, sizeof(*head));
+	if (list_empty(&jd->extent_list))
+		gfs2_map_journal_extents(sdp, jd);
+
+	since = filemap_sample_wb_err(mapping);
+	list_for_each_entry(je, &jd->extent_list, list) {
+		for (; block < je->lblock + je->blocks; block++) {
+			u64 dblock;
+
+			if (!page) {
+				page = find_or_create_page(mapping,
+						block >> shift, GFP_NOFS);
+				if (!page) {
+					ret = -ENOMEM;
+					done = true;
+					goto out;
+				}
+			}
+
+			if (bio) {
+				unsigned int off;
+
+				off = (block << bsize_shift) & ~PAGE_MASK;
+				sz = bio_add_page(bio, page, bsize, off);
+				if (sz == bsize) { /* block added */
+					if (off + bsize == PAGE_SIZE) {
+						page = NULL;
+						goto page_added;
+					}
+					continue;
+				}
+				blocks_submitted = block + 1;
+				submit_bio(bio);
+				bio = NULL;
+			}
+
+			dblock = je->dblock + (block - je->lblock);
+			bio = gfs2_log_alloc_bio(sdp, dblock, gfs2_end_log_read);
+			bio->bi_opf = REQ_OP_READ;
+			sz = bio_add_page(bio, page, bsize, 0);
+			gfs2_assert_warn(sdp, sz == bsize);
+			if (bsize == PAGE_SIZE)
+				page = NULL;
+
+page_added:
+			if (blocks_submitted < blocks_read + readhead_blocks) {
+				/* Keep at least one bio in flight */
+				continue;
+			}
+
+			gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done);
+			blocks_read += PAGE_SIZE >> bsize_shift;
+			if (done)
+				goto out;  /* found */
+		}
+	}
+
+out:
+	if (bio)
+		submit_bio(bio);
+	while (blocks_read < block) {
+		gfs2_jhead_process_page(jd, blocks_read >> shift, head, &done);
+		blocks_read += PAGE_SIZE >> bsize_shift;
+	}
+
+	if (!ret)
+		ret = filemap_check_wb_err(mapping, since);
+
+	if (!keep_cache)
+		truncate_inode_pages(mapping, 0);
+
+	return ret;
+}
+
 static struct page *gfs2_get_log_desc(struct gfs2_sbd *sdp, u32 ld_type,
 				      u32 ld_length, u32 ld_data1)
 {
@@ -528,7 +725,7 @@ static void buf_lo_before_scan(struct gfs2_jdesc *jd,
 	jd->jd_replayed_blocks = 0;
 }
 
-static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
+static int buf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start,
 				struct gfs2_log_descriptor *ld, __be64 *ptr,
 				int pass)
 {
@@ -562,9 +759,27 @@ static int buf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
 
 		if (gfs2_meta_check(sdp, bh_ip))
 			error = -EIO;
-		else
+		else {
+			struct gfs2_meta_header *mh =
+				(struct gfs2_meta_header *)bh_ip->b_data;
+
+			if (mh->mh_type == cpu_to_be32(GFS2_METATYPE_RG)) {
+				struct gfs2_rgrpd *rgd;
+
+				rgd = gfs2_blk2rgrpd(sdp, blkno, false);
+				if (rgd && rgd->rd_addr == blkno &&
+				    rgd->rd_bits && rgd->rd_bits->bi_bh) {
+					fs_info(sdp, "Replaying 0x%llx but we "
+						"already have a bh!\n",
+						(unsigned long long)blkno);
+					fs_info(sdp, "busy:%d, pinned:%d\n",
+						buffer_busy(rgd->rd_bits->bi_bh) ? 1 : 0,
+						buffer_pinned(rgd->rd_bits->bi_bh));
+					gfs2_dump_glock(NULL, rgd->rd_gl, true);
+				}
+			}
 			mark_buffer_dirty(bh_ip);
-
+		}
 		brelse(bh_log);
 		brelse(bh_ip);
 
@@ -621,7 +836,7 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 {
 	struct gfs2_meta_header *mh;
 	unsigned int offset;
-	struct list_head *head = &sdp->sd_log_le_revoke;
+	struct list_head *head = &sdp->sd_log_revokes;
 	struct gfs2_bufdata *bd;
 	struct page *page;
 	unsigned int length;
@@ -659,7 +874,7 @@ static void revoke_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 
 static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 {
-	struct list_head *head = &sdp->sd_log_le_revoke;
+	struct list_head *head = &sdp->sd_log_revokes;
 	struct gfs2_bufdata *bd;
 	struct gfs2_glock *gl;
 
@@ -667,8 +882,10 @@ static void revoke_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 		bd = list_entry(head->next, struct gfs2_bufdata, bd_list);
 		list_del_init(&bd->bd_list);
 		gl = bd->bd_gl;
-		atomic_dec(&gl->gl_revokes);
-		clear_bit(GLF_LFLUSH, &gl->gl_flags);
+		if (atomic_dec_return(&gl->gl_revokes) == 0) {
+			clear_bit(GLF_LFLUSH, &gl->gl_flags);
+			gfs2_glock_queue_put(gl);
+		}
 		kmem_cache_free(gfs2_bufdata_cachep, bd);
 	}
 }
@@ -683,7 +900,7 @@ static void revoke_lo_before_scan(struct gfs2_jdesc *jd,
 	jd->jd_replay_tail = head->lh_tail;
 }
 
-static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
+static int revoke_lo_scan_elements(struct gfs2_jdesc *jd, u32 start,
 				   struct gfs2_log_descriptor *ld, __be64 *ptr,
 				   int pass)
 {
@@ -765,7 +982,7 @@ static void databuf_lo_before_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr
 	gfs2_before_commit(sdp, limit, nbuf, &tr->tr_databuf, 1);
 }
 
-static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
+static int databuf_lo_scan_elements(struct gfs2_jdesc *jd, u32 start,
 				    struct gfs2_log_descriptor *ld,
 				    __be64 *ptr, int pass)
 {
@@ -851,7 +1068,7 @@ static void databuf_lo_after_commit(struct gfs2_sbd *sdp, struct gfs2_trans *tr)
 }
 
 
-const struct gfs2_log_operations gfs2_buf_lops = {
+static const struct gfs2_log_operations gfs2_buf_lops = {
 	.lo_before_commit = buf_lo_before_commit,
 	.lo_after_commit = buf_lo_after_commit,
 	.lo_before_scan = buf_lo_before_scan,
@@ -860,7 +1077,7 @@ const struct gfs2_log_operations gfs2_buf_lops = {
 	.lo_name = "buf",
 };
 
-const struct gfs2_log_operations gfs2_revoke_lops = {
+static const struct gfs2_log_operations gfs2_revoke_lops = {
 	.lo_before_commit = revoke_lo_before_commit,
 	.lo_after_commit = revoke_lo_after_commit,
 	.lo_before_scan = revoke_lo_before_scan,
@@ -869,7 +1086,7 @@ const struct gfs2_log_operations gfs2_revoke_lops = {
 	.lo_name = "revoke",
 };
 
-const struct gfs2_log_operations gfs2_databuf_lops = {
+static const struct gfs2_log_operations gfs2_databuf_lops = {
 	.lo_before_commit = databuf_lo_before_commit,
 	.lo_after_commit = databuf_lo_after_commit,
 	.lo_scan_elements = databuf_lo_scan_elements,
diff --git a/fs/gfs2/lops.h b/fs/gfs2/lops.h
index 711c4d89c063..9c059957a733 100644
--- a/fs/gfs2/lops.h
+++ b/fs/gfs2/lops.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __LOPS_DOT_H__
@@ -20,18 +17,15 @@
 	((sizeof(struct gfs2_log_descriptor) + (2 * sizeof(__be64) - 1)) & \
 	 ~(2 * sizeof(__be64) - 1))
 
-extern const struct gfs2_log_operations gfs2_glock_lops;
-extern const struct gfs2_log_operations gfs2_buf_lops;
-extern const struct gfs2_log_operations gfs2_revoke_lops;
-extern const struct gfs2_log_operations gfs2_databuf_lops;
-
 extern const struct gfs2_log_operations *gfs2_log_ops[];
 extern u64 gfs2_log_bmap(struct gfs2_sbd *sdp);
 extern void gfs2_log_write(struct gfs2_sbd *sdp, struct page *page,
 			   unsigned size, unsigned offset, u64 blkno);
 extern void gfs2_log_write_page(struct gfs2_sbd *sdp, struct page *page);
-extern void gfs2_log_submit_bio(struct bio **biop, int op, int op_flags);
+extern void gfs2_log_submit_bio(struct bio **biop, int opf);
 extern void gfs2_pin(struct gfs2_sbd *sdp, struct buffer_head *bh);
+extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
+			   struct gfs2_log_header_host *head, bool keep_cache);
 
 static inline unsigned int buf_limit(struct gfs2_sbd *sdp)
 {
@@ -77,7 +71,7 @@ static inline void lops_before_scan(struct gfs2_jdesc *jd,
 			gfs2_log_ops[x]->lo_before_scan(jd, head, pass);
 }
 
-static inline int lops_scan_elements(struct gfs2_jdesc *jd, unsigned int start,
+static inline int lops_scan_elements(struct gfs2_jdesc *jd, u32 start,
 				     struct gfs2_log_descriptor *ld,
 				     __be64 *ptr,
 				     unsigned int pass)
diff --git a/fs/gfs2/main.c b/fs/gfs2/main.c
index c7603063f861..a1a295b739fb 100644
--- a/fs/gfs2/main.c
+++ b/fs/gfs2/main.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -178,16 +175,12 @@ static int __init init_gfs2_fs(void)
 	if (!gfs2_page_pool)
 		goto fail_mempool;
 
-	error = gfs2_register_debugfs();
-	if (error)
-		goto fail_debugfs;
+	gfs2_register_debugfs();
 
 	pr_info("GFS2 installed\n");
 
 	return 0;
 
-fail_debugfs:
-	mempool_destroy(gfs2_page_pool);
 fail_mempool:
 	destroy_workqueue(gfs2_freeze_wq);
 fail_wq3:
diff --git a/fs/gfs2/meta_io.c b/fs/gfs2/meta_io.c
index be9c0bf697fe..662ef36c1874 100644
--- a/fs/gfs2/meta_io.c
+++ b/fs/gfs2/meta_io.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/sched.h>
@@ -189,9 +186,9 @@ struct buffer_head *gfs2_meta_new(struct gfs2_glock *gl, u64 blkno)
 static void gfs2_meta_read_endio(struct bio *bio)
 {
 	struct bio_vec *bvec;
-	int i;
+	struct bvec_iter_all iter_all;
 
-	bio_for_each_segment_all(bvec, bio, i) {
+	bio_for_each_segment_all(bvec, bio, iter_all) {
 		struct page *page = bvec->bv_page;
 		struct buffer_head *bh = page_buffers(page);
 		unsigned int len = bvec->bv_len;
@@ -254,7 +251,7 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
 	struct buffer_head *bh, *bhs[2];
 	int num = 0;
 
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags))) {
+	if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags))) {
 		*bhp = NULL;
 		return -EIO;
 	}
@@ -312,7 +309,7 @@ int gfs2_meta_read(struct gfs2_glock *gl, u64 blkno, int flags,
 
 int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh)
 {
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+	if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags)))
 		return -EIO;
 
 	wait_on_buffer(bh);
@@ -323,7 +320,7 @@ int gfs2_meta_wait(struct gfs2_sbd *sdp, struct buffer_head *bh)
 			gfs2_io_error_bh_wd(sdp, bh);
 		return -EIO;
 	}
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+	if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags)))
 		return -EIO;
 
 	return 0;
diff --git a/fs/gfs2/meta_io.h b/fs/gfs2/meta_io.h
index ffdf6aa3509d..eafb74e861c6 100644
--- a/fs/gfs2/meta_io.h
+++ b/fs/gfs2/meta_io.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __DIO_DOT_H__
diff --git a/fs/gfs2/ops_fstype.c b/fs/gfs2/ops_fstype.c
index b041cb8ae383..4a8e5a7310f0 100644
--- a/fs/gfs2/ops_fstype.c
+++ b/fs/gfs2/ops_fstype.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -41,6 +38,7 @@
 #include "dir.h"
 #include "meta_io.h"
 #include "trace_gfs2.h"
+#include "lops.h"
 
 #define DO 0
 #define UNDO 1
@@ -63,6 +61,13 @@ static void gfs2_tune_init(struct gfs2_tune *gt)
 	gt->gt_complain_secs = 10;
 }
 
+void free_sbd(struct gfs2_sbd *sdp)
+{
+	if (sdp->sd_lkstats)
+		free_percpu(sdp->sd_lkstats);
+	kfree(sdp);
+}
+
 static struct gfs2_sbd *init_sbd(struct super_block *sb)
 {
 	struct gfs2_sbd *sdp;
@@ -74,10 +79,8 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
 
 	sdp->sd_vfs = sb;
 	sdp->sd_lkstats = alloc_percpu(struct gfs2_pcpu_lkstats);
-	if (!sdp->sd_lkstats) {
-		kfree(sdp);
-		return NULL;
-	}
+	if (!sdp->sd_lkstats)
+		goto fail;
 	sb->s_fs_info = sdp;
 
 	set_bit(SDF_NOJOURNALID, &sdp->sd_flags);
@@ -117,8 +120,8 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
 
 	spin_lock_init(&sdp->sd_log_lock);
 	atomic_set(&sdp->sd_log_pinned, 0);
-	INIT_LIST_HEAD(&sdp->sd_log_le_revoke);
-	INIT_LIST_HEAD(&sdp->sd_log_le_ordered);
+	INIT_LIST_HEAD(&sdp->sd_log_revokes);
+	INIT_LIST_HEAD(&sdp->sd_log_ordered);
 	spin_lock_init(&sdp->sd_ordered_lock);
 
 	init_waitqueue_head(&sdp->sd_log_waitq);
@@ -136,8 +139,11 @@ static struct gfs2_sbd *init_sbd(struct super_block *sb)
 	mutex_init(&sdp->sd_freeze_mutex);
 
 	return sdp;
-}
 
+fail:
+	free_sbd(sdp);
+	return NULL;
+}
 
 /**
  * gfs2_check_sb - Check superblock
@@ -570,7 +576,7 @@ static int gfs2_jindex_hold(struct gfs2_sbd *sdp, struct gfs2_holder *ji_gh)
 
 		INIT_WORK(&jd->jd_work, gfs2_recover_func);
 		jd->jd_inode = gfs2_lookupi(sdp->sd_jindex, &name, 1);
-		if (!jd->jd_inode || IS_ERR(jd->jd_inode)) {
+		if (IS_ERR_OR_NULL(jd->jd_inode)) {
 			if (!jd->jd_inode)
 				error = -ENOENT;
 			else
@@ -616,7 +622,7 @@ static int check_journal_clean(struct gfs2_sbd *sdp, struct gfs2_jdesc *jd)
 		fs_err(sdp, "Error checking journal for spectator mount.\n");
 		goto out_unlock;
 	}
-	error = gfs2_find_jhead(jd, &head);
+	error = gfs2_find_jhead(jd, &head, false);
 	if (error) {
 		fs_err(sdp, "Error parsing journal for spectator mount.\n");
 		goto out_unlock;
@@ -998,7 +1004,7 @@ hostdata_error:
 void gfs2_lm_unmount(struct gfs2_sbd *sdp)
 {
 	const struct lm_lockops *lm = sdp->sd_lockstruct.ls_ops;
-	if (likely(!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) &&
+	if (likely(!test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) &&
 	    lm->lm_unmount)
 		lm->lm_unmount(sdp);
 }
@@ -1088,8 +1094,7 @@ static int fill_super(struct super_block *sb, struct gfs2_args *args, int silent
 	if (error) {
 		/* In this case, we haven't initialized sysfs, so we have to
 		   manually free the sdp. */
-		free_percpu(sdp->sd_lkstats);
-		kfree(sdp);
+		free_sbd(sdp);
 		sb->s_fs_info = NULL;
 		return error;
 	}
@@ -1192,7 +1197,6 @@ fail_lm:
 	gfs2_lm_unmount(sdp);
 fail_debug:
 	gfs2_delete_debugfs_file(sdp);
-	free_percpu(sdp->sd_lkstats);
 	/* gfs2_sys_fs_del must be the last thing we do, since it causes
 	 * sysfs to call function gfs2_sbd_release, which frees sdp. */
 	gfs2_sys_fs_del(sdp);
@@ -1372,7 +1376,6 @@ static void gfs2_kill_sb(struct super_block *sb)
 	sdp->sd_root_dir = NULL;
 	sdp->sd_master_dir = NULL;
 	shrink_dcache_sb(sb);
-	free_percpu(sdp->sd_lkstats);
 	kill_block_super(sb);
 }
 
diff --git a/fs/gfs2/quota.c b/fs/gfs2/quota.c
index 2ae5a109eea7..69c4b77f127b 100644
--- a/fs/gfs2/quota.c
+++ b/fs/gfs2/quota.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 /*
@@ -1478,7 +1475,7 @@ static void quotad_error(struct gfs2_sbd *sdp, const char *msg, int error)
 {
 	if (error == 0 || error == -EROFS)
 		return;
-	if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
+	if (!test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) {
 		fs_err(sdp, "gfs2_quotad: %s error %d\n", msg, error);
 		sdp->sd_log_error = error;
 		wake_up(&sdp->sd_logd_waitq);
diff --git a/fs/gfs2/quota.h b/fs/gfs2/quota.h
index 836f29480be6..765627d9a91e 100644
--- a/fs/gfs2/quota.h
+++ b/fs/gfs2/quota.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __QUOTA_DOT_H__
diff --git a/fs/gfs2/recovery.c b/fs/gfs2/recovery.c
index 2dac43065382..c529f8749a89 100644
--- a/fs/gfs2/recovery.c
+++ b/fs/gfs2/recovery.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/module.h>
@@ -182,129 +179,6 @@ static int get_log_header(struct gfs2_jdesc *jd, unsigned int blk,
 }
 
 /**
- * find_good_lh - find a good log header
- * @jd: the journal
- * @blk: the segment to start searching from
- * @lh: the log header to fill in
- * @forward: if true search forward in the log, else search backward
- *
- * Call get_log_header() to get a log header for a segment, but if the
- * segment is bad, either scan forward or backward until we find a good one.
- *
- * Returns: errno
- */
-
-static int find_good_lh(struct gfs2_jdesc *jd, unsigned int *blk,
-			struct gfs2_log_header_host *head)
-{
-	unsigned int orig_blk = *blk;
-	int error;
-
-	for (;;) {
-		error = get_log_header(jd, *blk, head);
-		if (error <= 0)
-			return error;
-
-		if (++*blk == jd->jd_blocks)
-			*blk = 0;
-
-		if (*blk == orig_blk) {
-			gfs2_consist_inode(GFS2_I(jd->jd_inode));
-			return -EIO;
-		}
-	}
-}
-
-/**
- * jhead_scan - make sure we've found the head of the log
- * @jd: the journal
- * @head: this is filled in with the log descriptor of the head
- *
- * At this point, seg and lh should be either the head of the log or just
- * before.  Scan forward until we find the head.
- *
- * Returns: errno
- */
-
-static int jhead_scan(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head)
-{
-	unsigned int blk = head->lh_blkno;
-	struct gfs2_log_header_host lh;
-	int error;
-
-	for (;;) {
-		if (++blk == jd->jd_blocks)
-			blk = 0;
-
-		error = get_log_header(jd, blk, &lh);
-		if (error < 0)
-			return error;
-		if (error == 1)
-			continue;
-
-		if (lh.lh_sequence == head->lh_sequence) {
-			gfs2_consist_inode(GFS2_I(jd->jd_inode));
-			return -EIO;
-		}
-		if (lh.lh_sequence < head->lh_sequence)
-			break;
-
-		*head = lh;
-	}
-
-	return 0;
-}
-
-/**
- * gfs2_find_jhead - find the head of a log
- * @jd: the journal
- * @head: the log descriptor for the head of the log is returned here
- *
- * Do a binary search of a journal and find the valid log entry with the
- * highest sequence number.  (i.e. the log head)
- *
- * Returns: errno
- */
-
-int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head)
-{
-	struct gfs2_log_header_host lh_1, lh_m;
-	u32 blk_1, blk_2, blk_m;
-	int error;
-
-	blk_1 = 0;
-	blk_2 = jd->jd_blocks - 1;
-
-	for (;;) {
-		blk_m = (blk_1 + blk_2) / 2;
-
-		error = find_good_lh(jd, &blk_1, &lh_1);
-		if (error)
-			return error;
-
-		error = find_good_lh(jd, &blk_m, &lh_m);
-		if (error)
-			return error;
-
-		if (blk_1 == blk_m || blk_m == blk_2)
-			break;
-
-		if (lh_1.lh_sequence <= lh_m.lh_sequence)
-			blk_1 = blk_m;
-		else
-			blk_2 = blk_m;
-	}
-
-	error = jhead_scan(jd, &lh_1);
-	if (error)
-		return error;
-
-	*head = lh_1;
-
-	return error;
-}
-
-/**
  * foreach_descriptor - go through the active part of the log
  * @jd: the journal
  * @start: the first log header in the active region
@@ -316,7 +190,7 @@ int gfs2_find_jhead(struct gfs2_jdesc *jd, struct gfs2_log_header_host *head)
  * Returns: errno
  */
 
-static int foreach_descriptor(struct gfs2_jdesc *jd, unsigned int start,
+static int foreach_descriptor(struct gfs2_jdesc *jd, u32 start,
 			      unsigned int end, int pass)
 {
 	struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
@@ -386,10 +260,12 @@ static void clean_journal(struct gfs2_jdesc *jd,
 			  struct gfs2_log_header_host *head)
 {
 	struct gfs2_sbd *sdp = GFS2_SB(jd->jd_inode);
+	u32 lblock = head->lh_blkno;
 
-	sdp->sd_log_flush_head = head->lh_blkno;
-	gfs2_replay_incr_blk(jd, &sdp->sd_log_flush_head);
-	gfs2_write_log_header(sdp, jd, head->lh_sequence + 1, 0,
+	gfs2_replay_incr_blk(jd, &lblock);
+	if (jd->jd_jid == sdp->sd_lockstruct.ls_jid)
+		sdp->sd_log_flush_head = lblock;
+	gfs2_write_log_header(sdp, jd, head->lh_sequence + 1, 0, lblock,
 			      GFS2_LOG_HEAD_UNMOUNT | GFS2_LOG_HEAD_RECOVERY,
 			      REQ_PREFLUSH | REQ_FUA | REQ_META | REQ_SYNC);
 }
@@ -467,7 +343,7 @@ void gfs2_recover_func(struct work_struct *work)
 	if (error)
 		goto fail_gunlock_ji;
 
-	error = gfs2_find_jhead(jd, &head);
+	error = gfs2_find_jhead(jd, &head, true);
 	if (error)
 		goto fail_gunlock_ji;
 	t_jhd = ktime_get();
@@ -512,7 +388,8 @@ void gfs2_recover_func(struct work_struct *work)
 		}
 
 		t_tlck = ktime_get();
-		fs_info(sdp, "jid=%u: Replaying journal...\n", jd->jd_jid);
+		fs_info(sdp, "jid=%u: Replaying journal...0x%x to 0x%x\n",
+			jd->jd_jid, head.lh_tail, head.lh_blkno);
 
 		for (pass = 0; pass < 2; pass++) {
 			lops_before_scan(jd, &head, pass);
diff --git a/fs/gfs2/recovery.h b/fs/gfs2/recovery.h
index 11d81248be85..0d30f8e804f4 100644
--- a/fs/gfs2/recovery.h
+++ b/fs/gfs2/recovery.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __RECOVERY_DOT_H__
@@ -14,7 +11,7 @@
 
 extern struct workqueue_struct *gfs_recovery_wq;
 
-static inline void gfs2_replay_incr_blk(struct gfs2_jdesc *jd, unsigned int *blk)
+static inline void gfs2_replay_incr_blk(struct gfs2_jdesc *jd, u32 *blk)
 {
 	if (++*blk == jd->jd_blocks)
 	        *blk = 0;
@@ -27,8 +24,6 @@ extern int gfs2_revoke_add(struct gfs2_jdesc *jd, u64 blkno, unsigned int where)
 extern int gfs2_revoke_check(struct gfs2_jdesc *jd, u64 blkno, unsigned int where);
 extern void gfs2_revoke_clean(struct gfs2_jdesc *jd);
 
-extern int gfs2_find_jhead(struct gfs2_jdesc *jd,
-		    struct gfs2_log_header_host *head);
 extern int gfs2_recover_journal(struct gfs2_jdesc *gfs2_jd, bool wait);
 extern void gfs2_recover_func(struct work_struct *work);
 extern int __get_log_header(struct gfs2_sbd *sdp,
diff --git a/fs/gfs2/rgrp.c b/fs/gfs2/rgrp.c
index 17a8d3b43990..49ac0a5e74ea 100644
--- a/fs/gfs2/rgrp.c
+++ b/fs/gfs2/rgrp.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -613,11 +610,12 @@ int gfs2_rsqa_alloc(struct gfs2_inode *ip)
 	return gfs2_qa_alloc(ip);
 }
 
-static void dump_rs(struct seq_file *seq, const struct gfs2_blkreserv *rs)
+static void dump_rs(struct seq_file *seq, const struct gfs2_blkreserv *rs,
+		    const char *fs_id_buf)
 {
 	struct gfs2_inode *ip = container_of(rs, struct gfs2_inode, i_res);
 
-	gfs2_print_dbg(seq, "  B: n:%llu s:%llu b:%u f:%u\n",
+	gfs2_print_dbg(seq, "%s  B: n:%llu s:%llu b:%u f:%u\n", fs_id_buf,
 		       (unsigned long long)ip->i_no_addr,
 		       (unsigned long long)gfs2_rbm_to_block(&rs->rs_rbm),
 		       rs->rs_rbm.offset, rs->rs_free);
@@ -1114,32 +1112,33 @@ static int gfs2_rgrp_lvb_valid(struct gfs2_rgrpd *rgd)
 {
 	struct gfs2_rgrp_lvb *rgl = rgd->rd_rgl;
 	struct gfs2_rgrp *str = (struct gfs2_rgrp *)rgd->rd_bits[0].bi_bh->b_data;
+	struct gfs2_sbd *sdp = rgd->rd_sbd;
 	int valid = 1;
 
 	if (rgl->rl_flags != str->rg_flags) {
-		printk(KERN_WARNING "GFS2: rgd: %llu lvb flag mismatch %u/%u",
-		       (unsigned long long)rgd->rd_addr,
+		fs_warn(sdp, "GFS2: rgd: %llu lvb flag mismatch %u/%u",
+			(unsigned long long)rgd->rd_addr,
 		       be32_to_cpu(rgl->rl_flags), be32_to_cpu(str->rg_flags));
 		valid = 0;
 	}
 	if (rgl->rl_free != str->rg_free) {
-		printk(KERN_WARNING "GFS2: rgd: %llu lvb free mismatch %u/%u",
-		       (unsigned long long)rgd->rd_addr,
-		       be32_to_cpu(rgl->rl_free), be32_to_cpu(str->rg_free));
+		fs_warn(sdp, "GFS2: rgd: %llu lvb free mismatch %u/%u",
+			(unsigned long long)rgd->rd_addr,
+			be32_to_cpu(rgl->rl_free), be32_to_cpu(str->rg_free));
 		valid = 0;
 	}
 	if (rgl->rl_dinodes != str->rg_dinodes) {
-		printk(KERN_WARNING "GFS2: rgd: %llu lvb dinode mismatch %u/%u",
-		       (unsigned long long)rgd->rd_addr,
-		       be32_to_cpu(rgl->rl_dinodes),
-		       be32_to_cpu(str->rg_dinodes));
+		fs_warn(sdp, "GFS2: rgd: %llu lvb dinode mismatch %u/%u",
+			(unsigned long long)rgd->rd_addr,
+			be32_to_cpu(rgl->rl_dinodes),
+			be32_to_cpu(str->rg_dinodes));
 		valid = 0;
 	}
 	if (rgl->rl_igeneration != str->rg_igeneration) {
-		printk(KERN_WARNING "GFS2: rgd: %llu lvb igen mismatch "
-		       "%llu/%llu", (unsigned long long)rgd->rd_addr,
-		       (unsigned long long)be64_to_cpu(rgl->rl_igeneration),
-		       (unsigned long long)be64_to_cpu(str->rg_igeneration));
+		fs_warn(sdp, "GFS2: rgd: %llu lvb igen mismatch %llu/%llu",
+			(unsigned long long)rgd->rd_addr,
+			(unsigned long long)be64_to_cpu(rgl->rl_igeneration),
+			(unsigned long long)be64_to_cpu(str->rg_igeneration));
 		valid = 0;
 	}
 	return valid;
@@ -1729,25 +1728,22 @@ fail:
 static int gfs2_rbm_find(struct gfs2_rbm *rbm, u8 state, u32 *minext,
 			 const struct gfs2_inode *ip, bool nowrap)
 {
+	bool scan_from_start = rbm->bii == 0 && rbm->offset == 0;
 	struct buffer_head *bh;
-	int initial_bii;
-	u32 initial_offset;
-	int first_bii = rbm->bii;
-	u32 first_offset = rbm->offset;
+	int last_bii;
 	u32 offset;
 	u8 *buffer;
-	int n = 0;
-	int iters = rbm->rgd->rd_length;
+	bool wrapped = false;
 	int ret;
 	struct gfs2_bitmap *bi;
 	struct gfs2_extent maxext = { .rbm.rgd = rbm->rgd, };
 
-	/* If we are not starting at the beginning of a bitmap, then we
-	 * need to add one to the bitmap count to ensure that we search
-	 * the starting bitmap twice.
+	/*
+	 * Determine the last bitmap to search.  If we're not starting at the
+	 * beginning of a bitmap, we need to search that bitmap twice to scan
+	 * the entire resource group.
 	 */
-	if (rbm->offset != 0)
-		iters++;
+	last_bii = rbm->bii - (rbm->offset == 0);
 
 	while(1) {
 		bi = rbm_bi(rbm);
@@ -1761,47 +1757,46 @@ static int gfs2_rbm_find(struct gfs2_rbm *rbm, u8 state, u32 *minext,
 		WARN_ON(!buffer_uptodate(bh));
 		if (state != GFS2_BLKST_UNLINKED && bi->bi_clone)
 			buffer = bi->bi_clone + bi->bi_offset;
-		initial_offset = rbm->offset;
 		offset = gfs2_bitfit(buffer, bi->bi_bytes, rbm->offset, state);
-		if (offset == BFITNOENT)
-			goto bitmap_full;
+		if (offset == BFITNOENT) {
+			if (state == GFS2_BLKST_FREE && rbm->offset == 0)
+				set_bit(GBF_FULL, &bi->bi_flags);
+			goto next_bitmap;
+		}
 		rbm->offset = offset;
 		if (ip == NULL)
 			return 0;
 
-		initial_bii = rbm->bii;
 		ret = gfs2_reservation_check_and_update(rbm, ip,
 							minext ? *minext : 0,
 							&maxext);
 		if (ret == 0)
 			return 0;
-		if (ret > 0) {
-			n += (rbm->bii - initial_bii);
+		if (ret > 0)
 			goto next_iter;
-		}
 		if (ret == -E2BIG) {
 			rbm->bii = 0;
 			rbm->offset = 0;
-			n += (rbm->bii - initial_bii);
 			goto res_covered_end_of_rgrp;
 		}
 		return ret;
 
-bitmap_full:	/* Mark bitmap as full and fall through */
-		if ((state == GFS2_BLKST_FREE) && initial_offset == 0)
-			set_bit(GBF_FULL, &bi->bi_flags);
-
 next_bitmap:	/* Find next bitmap in the rgrp */
 		rbm->offset = 0;
 		rbm->bii++;
 		if (rbm->bii == rbm->rgd->rd_length)
 			rbm->bii = 0;
 res_covered_end_of_rgrp:
-		if ((rbm->bii == 0) && nowrap)
-			break;
-		n++;
+		if (rbm->bii == 0) {
+			if (wrapped)
+				break;
+			wrapped = true;
+			if (nowrap)
+				break;
+		}
 next_iter:
-		if (n >= iters)
+		/* Have we scanned the entire resource group? */
+		if (wrapped && rbm->bii > last_bii)
 			break;
 	}
 
@@ -1811,8 +1806,8 @@ next_iter:
 	/* If the extent was too small, and it's smaller than the smallest
 	   to have failed before, remember for future reference that it's
 	   useless to search this rgrp again for this amount or more. */
-	if ((first_offset == 0) && (first_bii == 0) &&
-	    (*minext < rbm->rgd->rd_extfail_pt))
+	if (wrapped && (scan_from_start || rbm->bii > last_bii) &&
+	    *minext < rbm->rgd->rd_extfail_pt)
 		rbm->rgd->rd_extfail_pt = *minext;
 
 	/* If the maximum extent we found is big enough to fulfill the
@@ -2253,10 +2248,12 @@ static void rgblk_free(struct gfs2_sbd *sdp, struct gfs2_rgrpd *rgd,
  * gfs2_rgrp_dump - print out an rgrp
  * @seq: The iterator
  * @gl: The glock in question
+ * @fs_id_buf: pointer to file system id (if requested)
  *
  */
 
-void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_glock *gl)
+void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_glock *gl,
+		    const char *fs_id_buf)
 {
 	struct gfs2_rgrpd *rgd = gl->gl_object;
 	struct gfs2_blkreserv *trs;
@@ -2264,14 +2261,15 @@ void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_glock *gl)
 
 	if (rgd == NULL)
 		return;
-	gfs2_print_dbg(seq, " R: n:%llu f:%02x b:%u/%u i:%u r:%u e:%u\n",
+	gfs2_print_dbg(seq, "%s R: n:%llu f:%02x b:%u/%u i:%u r:%u e:%u\n",
+		       fs_id_buf,
 		       (unsigned long long)rgd->rd_addr, rgd->rd_flags,
 		       rgd->rd_free, rgd->rd_free_clone, rgd->rd_dinodes,
 		       rgd->rd_reserved, rgd->rd_extfail_pt);
 	if (rgd->rd_sbd->sd_args.ar_rgrplvb) {
 		struct gfs2_rgrp_lvb *rgl = rgd->rd_rgl;
 
-		gfs2_print_dbg(seq, "  L: f:%02x b:%u i:%u\n",
+		gfs2_print_dbg(seq, "%s  L: f:%02x b:%u i:%u\n", fs_id_buf,
 			       be32_to_cpu(rgl->rl_flags),
 			       be32_to_cpu(rgl->rl_free),
 			       be32_to_cpu(rgl->rl_dinodes));
@@ -2279,7 +2277,7 @@ void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_glock *gl)
 	spin_lock(&rgd->rd_rsspin);
 	for (n = rb_first(&rgd->rd_rstree); n; n = rb_next(&trs->rs_node)) {
 		trs = rb_entry(n, struct gfs2_blkreserv, rs_node);
-		dump_rs(seq, trs);
+		dump_rs(seq, trs, fs_id_buf);
 	}
 	spin_unlock(&rgd->rd_rsspin);
 }
@@ -2287,10 +2285,13 @@ void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_glock *gl)
 static void gfs2_rgrp_error(struct gfs2_rgrpd *rgd)
 {
 	struct gfs2_sbd *sdp = rgd->rd_sbd;
+	char fs_id_buf[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
+
 	fs_warn(sdp, "rgrp %llu has an error, marking it readonly until umount\n",
 		(unsigned long long)rgd->rd_addr);
 	fs_warn(sdp, "umount on all nodes and run fsck.gfs2 to fix the error\n");
-	gfs2_rgrp_dump(NULL, rgd->rd_gl);
+	sprintf(fs_id_buf, "fsid=%s: ", sdp->sd_fsname);
+	gfs2_rgrp_dump(NULL, rgd->rd_gl, fs_id_buf);
 	rgd->rd_flags |= GFS2_RDF_ERROR;
 }
 
@@ -2444,7 +2445,7 @@ int gfs2_alloc_blocks(struct gfs2_inode *ip, u64 *bn, unsigned int *nblocks,
 
 	gfs2_statfs_change(sdp, 0, -(s64)*nblocks, dinode ? 1 : 0);
 	if (dinode)
-		gfs2_trans_add_unrevoke(sdp, block, *nblocks);
+		gfs2_trans_remove_revoke(sdp, block, *nblocks);
 
 	gfs2_quota_change(ip, *nblocks, ip->i_inode.i_uid, ip->i_inode.i_gid);
 
diff --git a/fs/gfs2/rgrp.h b/fs/gfs2/rgrp.h
index 499079a9dbbe..c14a673ae36f 100644
--- a/fs/gfs2/rgrp.h
+++ b/fs/gfs2/rgrp.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2008 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __RGRP_DOT_H__
@@ -72,7 +69,8 @@ extern void gfs2_rlist_add(struct gfs2_inode *ip, struct gfs2_rgrp_list *rlist,
 extern void gfs2_rlist_alloc(struct gfs2_rgrp_list *rlist);
 extern void gfs2_rlist_free(struct gfs2_rgrp_list *rlist);
 extern u64 gfs2_ri_total(struct gfs2_sbd *sdp);
-extern void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_glock *gl);
+extern void gfs2_rgrp_dump(struct seq_file *seq, struct gfs2_glock *gl,
+			   const char *fs_id_buf);
 extern int gfs2_rgrp_send_discards(struct gfs2_sbd *sdp, u64 offset,
 				   struct buffer_head *bh,
 				   const struct gfs2_bitmap *bi, unsigned minlen, u64 *ptrimmed);
diff --git a/fs/gfs2/super.c b/fs/gfs2/super.c
index ca71163ff7cf..0acc5834f653 100644
--- a/fs/gfs2/super.c
+++ b/fs/gfs2/super.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2007 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -45,6 +42,7 @@
 #include "util.h"
 #include "sys.h"
 #include "xattr.h"
+#include "lops.h"
 
 #define args_neq(a1, a2, x) ((a1)->ar_##x != (a2)->ar_##x)
 
@@ -396,6 +394,7 @@ static int init_threads(struct gfs2_sbd *sdp)
 
 fail:
 	kthread_stop(sdp->sd_logd_process);
+	sdp->sd_logd_process = NULL;
 	return error;
 }
 
@@ -425,7 +424,7 @@ int gfs2_make_fs_rw(struct gfs2_sbd *sdp)
 
 	j_gl->gl_ops->go_inval(j_gl, DIO_METADATA);
 
-	error = gfs2_find_jhead(sdp->sd_jdesc, &head);
+	error = gfs2_find_jhead(sdp->sd_jdesc, &head, false);
 	if (error)
 		goto fail;
 
@@ -453,8 +452,12 @@ fail:
 	freeze_gh.gh_flags |= GL_NOCACHE;
 	gfs2_glock_dq_uninit(&freeze_gh);
 fail_threads:
-	kthread_stop(sdp->sd_quotad_process);
-	kthread_stop(sdp->sd_logd_process);
+	if (sdp->sd_quotad_process)
+		kthread_stop(sdp->sd_quotad_process);
+	sdp->sd_quotad_process = NULL;
+	if (sdp->sd_logd_process)
+		kthread_stop(sdp->sd_logd_process);
+	sdp->sd_logd_process = NULL;
 	return error;
 }
 
@@ -680,7 +683,7 @@ static int gfs2_lock_fs_check_clean(struct gfs2_sbd *sdp,
 		error = gfs2_jdesc_check(jd);
 		if (error)
 			break;
-		error = gfs2_find_jhead(jd, &lh);
+		error = gfs2_find_jhead(jd, &lh, false);
 		if (error)
 			break;
 		if (!(lh.lh_flags & GFS2_LOG_HEAD_UNMOUNT)) {
@@ -802,7 +805,7 @@ static void gfs2_dirty_inode(struct inode *inode, int flags)
 
 	if (!(flags & I_DIRTY_INODE))
 		return;
-	if (unlikely(test_bit(SDF_SHUTDOWN, &sdp->sd_flags)))
+	if (unlikely(test_bit(SDF_WITHDRAWN, &sdp->sd_flags)))
 		return;
 	if (!gfs2_glock_is_locked_by_me(ip->i_gl)) {
 		ret = gfs2_glock_nq_init(ip->i_gl, LM_ST_EXCLUSIVE, 0, &gh);
@@ -851,12 +854,16 @@ static int gfs2_make_fs_ro(struct gfs2_sbd *sdp)
 
 	error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, GL_NOCACHE,
 				   &freeze_gh);
-	if (error && !test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
+	if (error && !test_bit(SDF_WITHDRAWN, &sdp->sd_flags))
 		return error;
 
 	flush_workqueue(gfs2_delete_workqueue);
-	kthread_stop(sdp->sd_quotad_process);
-	kthread_stop(sdp->sd_logd_process);
+	if (sdp->sd_quotad_process)
+		kthread_stop(sdp->sd_quotad_process);
+	sdp->sd_quotad_process = NULL;
+	if (sdp->sd_logd_process)
+		kthread_stop(sdp->sd_logd_process);
+	sdp->sd_logd_process = NULL;
 
 	gfs2_quota_sync(sdp->sd_vfs, 0);
 	gfs2_statfs_sync(sdp->sd_vfs, 0);
@@ -971,15 +978,14 @@ void gfs2_freeze_func(struct work_struct *work)
 	error = gfs2_glock_nq_init(sdp->sd_freeze_gl, LM_ST_SHARED, 0,
 				   &freeze_gh);
 	if (error) {
-		printk(KERN_INFO "GFS2: couldn't get freeze lock : %d\n", error);
+		fs_info(sdp, "GFS2: couldn't get freeze lock : %d\n", error);
 		gfs2_assert_withdraw(sdp, 0);
-	}
-	else {
+	} else {
 		atomic_set(&sdp->sd_freeze_state, SFS_UNFROZEN);
 		error = thaw_super(sb);
 		if (error) {
-			printk(KERN_INFO "GFS2: couldn't thaw filesystem: %d\n",
-			       error);
+			fs_info(sdp, "GFS2: couldn't thaw filesystem: %d\n",
+				error);
 			gfs2_assert_withdraw(sdp, 0);
 		}
 		if (!test_bit(SDF_JOURNAL_LIVE, &sdp->sd_flags))
@@ -987,6 +993,8 @@ void gfs2_freeze_func(struct work_struct *work)
 		gfs2_glock_dq_uninit(&freeze_gh);
 	}
 	deactivate_super(sb);
+	clear_bit_unlock(SDF_FS_FROZEN, &sdp->sd_flags);
+	wake_up_bit(&sdp->sd_flags, SDF_FS_FROZEN);
 	return;
 }
 
@@ -1005,7 +1013,7 @@ static int gfs2_freeze(struct super_block *sb)
 	if (atomic_read(&sdp->sd_freeze_state) != SFS_UNFROZEN)
 		goto out;
 
-	if (test_bit(SDF_SHUTDOWN, &sdp->sd_flags)) {
+	if (test_bit(SDF_WITHDRAWN, &sdp->sd_flags)) {
 		error = -EINVAL;
 		goto out;
 	}
@@ -1015,20 +1023,15 @@ static int gfs2_freeze(struct super_block *sb)
 		if (!error)
 			break;
 
-		switch (error) {
-		case -EBUSY:
+		if (error == -EBUSY)
 			fs_err(sdp, "waiting for recovery before freeze\n");
-			break;
-
-		default:
+		else
 			fs_err(sdp, "error freezing FS: %d\n", error);
-			break;
-		}
 
 		fs_err(sdp, "retrying...\n");
 		msleep(1000);
 	}
-	error = 0;
+	set_bit(SDF_FS_FROZEN, &sdp->sd_flags);
 out:
 	mutex_unlock(&sdp->sd_freeze_mutex);
 	return error;
@@ -1053,7 +1056,7 @@ static int gfs2_unfreeze(struct super_block *sb)
 
 	gfs2_glock_dq_uninit(&sdp->sd_freeze_gh);
 	mutex_unlock(&sdp->sd_freeze_mutex);
-	return 0;
+	return wait_on_bit(&sdp->sd_flags, SDF_FS_FROZEN, TASK_INTERRUPTIBLE);
 }
 
 /**
@@ -1273,8 +1276,6 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
 			error = gfs2_make_fs_ro(sdp);
 		else
 			error = gfs2_make_fs_rw(sdp);
-		if (error)
-			return error;
 	}
 
 	sdp->sd_args = args;
@@ -1300,7 +1301,7 @@ static int gfs2_remount_fs(struct super_block *sb, int *flags, char *data)
 	spin_unlock(&gt->gt_spin);
 
 	gfs2_online_uevent(sdp);
-	return 0;
+	return error;
 }
 
 /**
@@ -1630,8 +1631,6 @@ alloc_failed:
 			goto out_truncate;
 	}
 
-	/* Case 1 starts here */
-
 	if (S_ISDIR(inode->i_mode) &&
 	    (ip->i_diskflags & GFS2_DIF_EXHASH)) {
 		error = gfs2_dir_exhash_dealloc(ip);
@@ -1670,7 +1669,6 @@ out_truncate:
 	write_inode_now(inode, 1);
 	gfs2_ail_flush(ip->i_gl, 0);
 
-	/* Case 2 starts here */
 	error = gfs2_trans_begin(sdp, 0, sdp->sd_jdesc->jd_blocks);
 	if (error)
 		goto out_unlock;
@@ -1680,7 +1678,6 @@ out_truncate:
 	gfs2_trans_end(sdp);
 
 out_unlock:
-	/* Error path for case 1 */
 	if (gfs2_rs_active(&ip->i_res))
 		gfs2_rs_deltree(&ip->i_res);
 
@@ -1699,7 +1696,6 @@ out_unlock:
 	if (error && error != GLR_TRYFAILED && error != -EROFS)
 		fs_warn(sdp, "gfs2_evict_inode: %d\n", error);
 out:
-	/* Case 3 starts here */
 	truncate_inode_pages_final(&inode->i_data);
 	gfs2_rsqa_delete(ip, NULL);
 	gfs2_ordered_del_inode(ip);
@@ -1736,20 +1732,14 @@ static struct inode *gfs2_alloc_inode(struct super_block *sb)
 	return &ip->i_inode;
 }
 
-static void gfs2_i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kmem_cache_free(gfs2_inode_cachep, inode);
-}
-
-static void gfs2_destroy_inode(struct inode *inode)
+static void gfs2_free_inode(struct inode *inode)
 {
-	call_rcu(&inode->i_rcu, gfs2_i_callback);
+	kmem_cache_free(gfs2_inode_cachep, GFS2_I(inode));
 }
 
 const struct super_operations gfs2_super_ops = {
 	.alloc_inode		= gfs2_alloc_inode,
-	.destroy_inode		= gfs2_destroy_inode,
+	.free_inode		= gfs2_free_inode,
 	.write_inode		= gfs2_write_inode,
 	.dirty_inode		= gfs2_dirty_inode,
 	.evict_inode		= gfs2_evict_inode,
diff --git a/fs/gfs2/super.h b/fs/gfs2/super.h
index 73c97dccae21..9d49eaadb9d9 100644
--- a/fs/gfs2/super.h
+++ b/fs/gfs2/super.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __SUPER_DOT_H__
@@ -47,6 +44,8 @@ extern void update_statfs(struct gfs2_sbd *sdp, struct buffer_head *m_bh,
 extern int gfs2_statfs_sync(struct super_block *sb, int type);
 extern void gfs2_freeze_func(struct work_struct *work);
 
+extern void free_sbd(struct gfs2_sbd *sdp);
+
 extern struct file_system_type gfs2_fs_type;
 extern struct file_system_type gfs2meta_fs_type;
 extern const struct export_operations gfs2_export_ops;
diff --git a/fs/gfs2/sys.c b/fs/gfs2/sys.c
index 1787d295834e..dd15b8e4af2c 100644
--- a/fs/gfs2/sys.c
+++ b/fs/gfs2/sys.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -121,7 +118,7 @@ static ssize_t freeze_store(struct gfs2_sbd *sdp, const char *buf, size_t len)
 
 static ssize_t withdraw_show(struct gfs2_sbd *sdp, char *buf)
 {
-	unsigned int b = test_bit(SDF_SHUTDOWN, &sdp->sd_flags);
+	unsigned int b = test_bit(SDF_WITHDRAWN, &sdp->sd_flags);
 	return snprintf(buf, PAGE_SIZE, "%u\n", b);
 }
 
@@ -299,17 +296,18 @@ static struct attribute *gfs2_attrs[] = {
 	&gfs2_attr_demote_rq.attr,
 	NULL,
 };
+ATTRIBUTE_GROUPS(gfs2);
 
 static void gfs2_sbd_release(struct kobject *kobj)
 {
 	struct gfs2_sbd *sdp = container_of(kobj, struct gfs2_sbd, sd_kobj);
 
-	kfree(sdp);
+	free_sbd(sdp);
 }
 
 static struct kobj_type gfs2_ktype = {
 	.release = gfs2_sbd_release,
-	.default_attrs = gfs2_attrs,
+	.default_groups = gfs2_groups,
 	.sysfs_ops     = &gfs2_attr_ops,
 };
 
@@ -650,7 +648,6 @@ int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 	char ro[20];
 	char spectator[20];
 	char *envp[] = { ro, spectator, NULL };
-	int sysfs_frees_sdp = 0;
 
 	sprintf(ro, "RDONLY=%d", sb_rdonly(sb));
 	sprintf(spectator, "SPECTATOR=%d", sdp->sd_args.ar_spectator ? 1 : 0);
@@ -661,8 +658,6 @@ int gfs2_sys_fs_add(struct gfs2_sbd *sdp)
 	if (error)
 		goto fail_reg;
 
-	sysfs_frees_sdp = 1; /* Freeing sdp is now done by sysfs calling
-				function gfs2_sbd_release. */
 	error = sysfs_create_group(&sdp->sd_kobj, &tune_group);
 	if (error)
 		goto fail_reg;
@@ -685,12 +680,8 @@ fail_lock_module:
 fail_tune:
 	sysfs_remove_group(&sdp->sd_kobj, &tune_group);
 fail_reg:
-	free_percpu(sdp->sd_lkstats);
 	fs_err(sdp, "error %d adding sysfs files\n", error);
-	if (sysfs_frees_sdp)
-		kobject_put(&sdp->sd_kobj);
-	else
-		kfree(sdp);
+	kobject_put(&sdp->sd_kobj);
 	sb->s_fs_info = NULL;
 	return error;
 }
diff --git a/fs/gfs2/sys.h b/fs/gfs2/sys.h
index 79182d6ad6ac..f8dacf20e1a4 100644
--- a/fs/gfs2/sys.h
+++ b/fs/gfs2/sys.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __SYS_DOT_H__
diff --git a/fs/gfs2/trans.c b/fs/gfs2/trans.c
index cd9a94a6b5bb..35e3059255fe 100644
--- a/fs/gfs2/trans.c
+++ b/fs/gfs2/trans.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -80,10 +77,10 @@ static void gfs2_print_trans(struct gfs2_sbd *sdp, const struct gfs2_trans *tr)
 	fs_warn(sdp, "blocks=%u revokes=%u reserved=%u touched=%u\n",
 		tr->tr_blocks, tr->tr_revokes, tr->tr_reserved,
 		test_bit(TR_TOUCHED, &tr->tr_flags));
-	fs_warn(sdp, "Buf %u/%u Databuf %u/%u Revoke %u/%u\n",
+	fs_warn(sdp, "Buf %u/%u Databuf %u/%u Revoke %u\n",
 		tr->tr_num_buf_new, tr->tr_num_buf_rm,
 		tr->tr_num_databuf_new, tr->tr_num_databuf_rm,
-		tr->tr_num_revoke, tr->tr_num_revoke_rm);
+		tr->tr_num_revoke);
 }
 
 void gfs2_trans_end(struct gfs2_sbd *sdp)
@@ -253,20 +250,20 @@ void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd)
 	tr->tr_num_revoke++;
 }
 
-void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
+void gfs2_trans_remove_revoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len)
 {
 	struct gfs2_bufdata *bd, *tmp;
 	struct gfs2_trans *tr = current->journal_info;
 	unsigned int n = len;
 
 	gfs2_log_lock(sdp);
-	list_for_each_entry_safe(bd, tmp, &sdp->sd_log_le_revoke, bd_list) {
+	list_for_each_entry_safe(bd, tmp, &sdp->sd_log_revokes, bd_list) {
 		if ((bd->bd_blkno >= blkno) && (bd->bd_blkno < (blkno + len))) {
 			list_del_init(&bd->bd_list);
 			gfs2_assert_withdraw(sdp, sdp->sd_log_num_revoke);
 			sdp->sd_log_num_revoke--;
 			kmem_cache_free(gfs2_bufdata_cachep, bd);
-			tr->tr_num_revoke_rm++;
+			tr->tr_num_revoke--;
 			if (--n == 0)
 				break;
 		}
diff --git a/fs/gfs2/trans.h b/fs/gfs2/trans.h
index ad70087d0597..6071334de035 100644
--- a/fs/gfs2/trans.h
+++ b/fs/gfs2/trans.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __TRANS_DOT_H__
@@ -44,6 +41,6 @@ extern void gfs2_trans_end(struct gfs2_sbd *sdp);
 extern void gfs2_trans_add_data(struct gfs2_glock *gl, struct buffer_head *bh);
 extern void gfs2_trans_add_meta(struct gfs2_glock *gl, struct buffer_head *bh);
 extern void gfs2_trans_add_revoke(struct gfs2_sbd *sdp, struct gfs2_bufdata *bd);
-extern void gfs2_trans_add_unrevoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len);
+extern void gfs2_trans_remove_revoke(struct gfs2_sbd *sdp, u64 blkno, unsigned int len);
 
 #endif /* __TRANS_DOT_H__ */
diff --git a/fs/gfs2/util.c b/fs/gfs2/util.c
index 0a814ccac41d..83f6c582773a 100644
--- a/fs/gfs2/util.c
+++ b/fs/gfs2/util.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -44,7 +41,7 @@ int gfs2_lm_withdraw(struct gfs2_sbd *sdp, const char *fmt, ...)
 	struct va_format vaf;
 
 	if (sdp->sd_args.ar_errors == GFS2_ERRORS_WITHDRAW &&
-	    test_and_set_bit(SDF_SHUTDOWN, &sdp->sd_flags))
+	    test_and_set_bit(SDF_WITHDRAWN, &sdp->sd_flags))
 		return 0;
 
 	if (fmt) {
@@ -181,9 +178,11 @@ int gfs2_consist_rgrpd_i(struct gfs2_rgrpd *rgd, int cluster_wide,
 			 const char *function, char *file, unsigned int line)
 {
 	struct gfs2_sbd *sdp = rgd->rd_sbd;
+	char fs_id_buf[GFS2_FSNAME_LEN + 3 * sizeof(int) + 2];
 	int rv;
 
-	gfs2_rgrp_dump(NULL, rgd->rd_gl);
+	sprintf(fs_id_buf, "fsid=%s: ", sdp->sd_fsname);
+	gfs2_rgrp_dump(NULL, rgd->rd_gl, fs_id_buf);
 	rv = gfs2_lm_withdraw(sdp,
 			      "fatal: filesystem consistency error\n"
 			      "  RG = %llu\n"
@@ -259,7 +258,7 @@ void gfs2_io_error_bh_i(struct gfs2_sbd *sdp, struct buffer_head *bh,
 			const char *function, char *file, unsigned int line,
 			bool withdraw)
 {
-	if (!test_bit(SDF_SHUTDOWN, &sdp->sd_flags))
+	if (!test_bit(SDF_WITHDRAWN, &sdp->sd_flags))
 		fs_err(sdp,
 		       "fatal: I/O error\n"
 		       "  block = %llu\n"
diff --git a/fs/gfs2/util.h b/fs/gfs2/util.h
index 9278fecba632..4b68b2c1fe56 100644
--- a/fs/gfs2/util.h
+++ b/fs/gfs2/util.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __UTIL_DOT_H__
diff --git a/fs/gfs2/xattr.c b/fs/gfs2/xattr.c
index 996c915a9c97..bbe593d16bea 100644
--- a/fs/gfs2/xattr.c
+++ b/fs/gfs2/xattr.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #include <linux/slab.h>
@@ -631,7 +628,7 @@ static int ea_alloc_blk(struct gfs2_inode *ip, struct buffer_head **bhp)
 	error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
 	if (error)
 		return error;
-	gfs2_trans_add_unrevoke(sdp, block, 1);
+	gfs2_trans_remove_revoke(sdp, block, 1);
 	*bhp = gfs2_meta_new(ip->i_gl, block);
 	gfs2_trans_add_meta(ip->i_gl, *bhp);
 	gfs2_metatype_set(*bhp, GFS2_METATYPE_EA, GFS2_FORMAT_EA);
@@ -693,7 +690,7 @@ static int ea_write(struct gfs2_inode *ip, struct gfs2_ea_header *ea,
 			error = gfs2_alloc_blocks(ip, &block, &n, 0, NULL);
 			if (error)
 				return error;
-			gfs2_trans_add_unrevoke(sdp, block, 1);
+			gfs2_trans_remove_revoke(sdp, block, 1);
 			bh = gfs2_meta_new(ip->i_gl, block);
 			gfs2_trans_add_meta(ip->i_gl, bh);
 			gfs2_metatype_set(bh, GFS2_METATYPE_ED, GFS2_FORMAT_ED);
@@ -997,7 +994,7 @@ static int ea_set_block(struct gfs2_inode *ip, struct gfs2_ea_request *er,
 		error = gfs2_alloc_blocks(ip, &blk, &n, 0, NULL);
 		if (error)
 			return error;
-		gfs2_trans_add_unrevoke(sdp, blk, 1);
+		gfs2_trans_remove_revoke(sdp, blk, 1);
 		indbh = gfs2_meta_new(ip->i_gl, blk);
 		gfs2_trans_add_meta(ip->i_gl, indbh);
 		gfs2_metatype_set(indbh, GFS2_METATYPE_IN, GFS2_FORMAT_IN);
diff --git a/fs/gfs2/xattr.h b/fs/gfs2/xattr.h
index 2d887c88eb49..2aed9d7d483d 100644
--- a/fs/gfs2/xattr.h
+++ b/fs/gfs2/xattr.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * Copyright (C) Sistina Software, Inc.  1997-2003 All rights reserved.
  * Copyright (C) 2004-2006 Red Hat, Inc.  All rights reserved.
- *
- * This copyrighted material is made available to anyone wishing to use,
- * modify, copy, or redistribute it subject to the terms and conditions
- * of the GNU General Public License version 2.
  */
 
 #ifndef __EATTR_DOT_H__
diff --git a/fs/hfs/Kconfig b/fs/hfs/Kconfig
index 998e3a6decf3..44f6e89bcb75 100644
--- a/fs/hfs/Kconfig
+++ b/fs/hfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config HFS_FS
 	tristate "Apple Macintosh file system support"
 	depends on BLOCK
diff --git a/fs/hfs/Makefile b/fs/hfs/Makefile
index c41f5a85f42d..b65459bf3dc4 100644
--- a/fs/hfs/Makefile
+++ b/fs/hfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux hfs filesystem routines.
 #
diff --git a/fs/hfs/super.c b/fs/hfs/super.c
index 173876782f73..c33324686d89 100644
--- a/fs/hfs/super.c
+++ b/fs/hfs/super.c
@@ -167,20 +167,14 @@ static struct inode *hfs_alloc_inode(struct super_block *sb)
 	return i ? &i->vfs_inode : NULL;
 }
 
-static void hfs_i_callback(struct rcu_head *head)
+static void hfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(hfs_inode_cachep, HFS_I(inode));
 }
 
-static void hfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, hfs_i_callback);
-}
-
 static const struct super_operations hfs_super_operations = {
 	.alloc_inode	= hfs_alloc_inode,
-	.destroy_inode	= hfs_destroy_inode,
+	.free_inode	= hfs_free_inode,
 	.write_inode	= hfs_write_inode,
 	.evict_inode	= hfs_evict_inode,
 	.put_super	= hfs_put_super,
diff --git a/fs/hfsplus/Kconfig b/fs/hfsplus/Kconfig
index a63371815aab..7d4229aecec0 100644
--- a/fs/hfsplus/Kconfig
+++ b/fs/hfsplus/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config HFSPLUS_FS
 	tristate "Apple Extended HFS file system support"
 	depends on BLOCK
diff --git a/fs/hfsplus/ioctl.c b/fs/hfsplus/ioctl.c
index 5e6502ef7415..ce15b9496b77 100644
--- a/fs/hfsplus/ioctl.c
+++ b/fs/hfsplus/ioctl.c
@@ -57,9 +57,8 @@ static int hfsplus_ioctl_bless(struct file *file, int __user *user_flags)
 	return 0;
 }
 
-static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags)
+static inline unsigned int hfsplus_getflags(struct inode *inode)
 {
-	struct inode *inode = file_inode(file);
 	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 	unsigned int flags = 0;
 
@@ -69,6 +68,13 @@ static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags)
 		flags |= FS_APPEND_FL;
 	if (hip->userflags & HFSPLUS_FLG_NODUMP)
 		flags |= FS_NODUMP_FL;
+	return flags;
+}
+
+static int hfsplus_ioctl_getflags(struct file *file, int __user *user_flags)
+{
+	struct inode *inode = file_inode(file);
+	unsigned int flags = hfsplus_getflags(inode);
 
 	return put_user(flags, user_flags);
 }
@@ -78,6 +84,7 @@ static int hfsplus_ioctl_setflags(struct file *file, int __user *user_flags)
 	struct inode *inode = file_inode(file);
 	struct hfsplus_inode_info *hip = HFSPLUS_I(inode);
 	unsigned int flags, new_fl = 0;
+	unsigned int oldflags = hfsplus_getflags(inode);
 	int err = 0;
 
 	err = mnt_want_write_file(file);
@@ -96,13 +103,9 @@ static int hfsplus_ioctl_setflags(struct file *file, int __user *user_flags)
 
 	inode_lock(inode);
 
-	if ((flags & (FS_IMMUTABLE_FL|FS_APPEND_FL)) ||
-	    inode->i_flags & (S_IMMUTABLE|S_APPEND)) {
-		if (!capable(CAP_LINUX_IMMUTABLE)) {
-			err = -EPERM;
-			goto out_unlock_inode;
-		}
-	}
+	err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+	if (err)
+		goto out_unlock_inode;
 
 	/* don't silently ignore unsupported ext2 flags */
 	if (flags & ~(FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NODUMP_FL)) {
diff --git a/fs/hfsplus/super.c b/fs/hfsplus/super.c
index eb4535eba95d..2b9e5743105e 100644
--- a/fs/hfsplus/super.c
+++ b/fs/hfsplus/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/hfsplus/super.c
  *
@@ -18,7 +19,7 @@
 #include <linux/nls.h>
 
 static struct inode *hfsplus_alloc_inode(struct super_block *sb);
-static void hfsplus_destroy_inode(struct inode *inode);
+static void hfsplus_free_inode(struct inode *inode);
 
 #include "hfsplus_fs.h"
 #include "xattr.h"
@@ -361,7 +362,7 @@ static int hfsplus_remount(struct super_block *sb, int *flags, char *data)
 
 static const struct super_operations hfsplus_sops = {
 	.alloc_inode	= hfsplus_alloc_inode,
-	.destroy_inode	= hfsplus_destroy_inode,
+	.free_inode	= hfsplus_free_inode,
 	.write_inode	= hfsplus_write_inode,
 	.evict_inode	= hfsplus_evict_inode,
 	.put_super	= hfsplus_put_super,
@@ -628,18 +629,11 @@ static struct inode *hfsplus_alloc_inode(struct super_block *sb)
 	return i ? &i->vfs_inode : NULL;
 }
 
-static void hfsplus_i_callback(struct rcu_head *head)
+static void hfsplus_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-
 	kmem_cache_free(hfsplus_inode_cachep, HFSPLUS_I(inode));
 }
 
-static void hfsplus_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, hfsplus_i_callback);
-}
-
 #define HFSPLUS_INODE_SIZE	sizeof(struct hfsplus_inode_info)
 
 static struct dentry *hfsplus_mount(struct file_system_type *fs_type,
diff --git a/fs/hostfs/hostfs.h b/fs/hostfs/hostfs.h
index 33b8423ef0c9..f4295aa19350 100644
--- a/fs/hostfs/hostfs.h
+++ b/fs/hostfs/hostfs.h
@@ -87,7 +87,7 @@ extern int do_mkdir(const char *file, int mode);
 extern int hostfs_do_rmdir(const char *file);
 extern int do_mknod(const char *file, int mode, unsigned int major,
 		    unsigned int minor);
-extern int link_file(const char *from, const char *to);
+extern int link_file(const char *to, const char *from);
 extern int hostfs_do_readlink(char *file, char *buf, int size);
 extern int rename_file(char *from, char *to);
 extern int rename2_file(char *from, char *to, unsigned int flags);
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 444c7b170359..5a7eb0c79839 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -243,17 +243,11 @@ static void hostfs_evict_inode(struct inode *inode)
 	}
 }
 
-static void hostfs_i_callback(struct rcu_head *head)
+static void hostfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kfree(HOSTFS_I(inode));
 }
 
-static void hostfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, hostfs_i_callback);
-}
-
 static int hostfs_show_options(struct seq_file *seq, struct dentry *root)
 {
 	const char *root_path = root->d_sb->s_fs_info;
@@ -270,7 +264,7 @@ static int hostfs_show_options(struct seq_file *seq, struct dentry *root)
 
 static const struct super_operations hostfs_sbops = {
 	.alloc_inode	= hostfs_alloc_inode,
-	.destroy_inode	= hostfs_destroy_inode,
+	.free_inode	= hostfs_free_inode,
 	.evict_inode	= hostfs_evict_inode,
 	.statfs		= hostfs_statfs,
 	.show_options	= hostfs_show_options,
diff --git a/fs/hpfs/Kconfig b/fs/hpfs/Kconfig
index 56bd15c5bf6c..56aa0336254a 100644
--- a/fs/hpfs/Kconfig
+++ b/fs/hpfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config HPFS_FS
 	tristate "OS/2 HPFS file system support"
 	depends on BLOCK
diff --git a/fs/hpfs/Makefile b/fs/hpfs/Makefile
index 57b786fb9827..153c17382c19 100644
--- a/fs/hpfs/Makefile
+++ b/fs/hpfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux hpfs filesystem routines.
 #
diff --git a/fs/hpfs/hpfs.h b/fs/hpfs/hpfs.h
index 823a328791c0..302f45101a96 100644
--- a/fs/hpfs/hpfs.h
+++ b/fs/hpfs/hpfs.h
@@ -120,11 +120,11 @@ struct hpfs_spare_block
   u8 bad_sector: 1;			/* bad sector, corrupted disk (???) */
   u8 bad_bitmap: 1;			/* bad bitmap */
   u8 fast: 1;				/* partition was fast formatted */
-  u8 old_wrote: 1;			/* old version wrote to partion */
-  u8 old_wrote_1: 1;			/* old version wrote to partion (?) */
+  u8 old_wrote: 1;			/* old version wrote to partition */
+  u8 old_wrote_1: 1;			/* old version wrote to partition (?) */
 #else
-  u8 old_wrote_1: 1;			/* old version wrote to partion (?) */
-  u8 old_wrote: 1;			/* old version wrote to partion */
+  u8 old_wrote_1: 1;			/* old version wrote to partition (?) */
+  u8 old_wrote: 1;			/* old version wrote to partition */
   u8 fast: 1;				/* partition was fast formatted */
   u8 bad_bitmap: 1;			/* bad bitmap */
   u8 bad_sector: 1;			/* bad sector, corrupted disk (???) */
diff --git a/fs/hpfs/super.c b/fs/hpfs/super.c
index f2c3ebcd309c..9db6d84f0d62 100644
--- a/fs/hpfs/super.c
+++ b/fs/hpfs/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/hpfs/super.c
  *
@@ -238,17 +239,11 @@ static struct inode *hpfs_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void hpfs_i_callback(struct rcu_head *head)
+static void hpfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(hpfs_inode_cachep, hpfs_i(inode));
 }
 
-static void hpfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, hpfs_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct hpfs_inode_info *ei = (struct hpfs_inode_info *) foo;
@@ -532,7 +527,7 @@ static int hpfs_show_options(struct seq_file *seq, struct dentry *root)
 static const struct super_operations hpfs_sops =
 {
 	.alloc_inode	= hpfs_alloc_inode,
-	.destroy_inode	= hpfs_destroy_inode,
+	.free_inode	= hpfs_free_inode,
 	.evict_inode	= hpfs_evict_inode,
 	.put_super	= hpfs_put_super,
 	.statfs		= hpfs_statfs,
diff --git a/fs/hugetlbfs/Makefile b/fs/hugetlbfs/Makefile
index 6adf870c63c6..d876ecfbe6bb 100644
--- a/fs/hugetlbfs/Makefile
+++ b/fs/hugetlbfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux ramfs routines.
 #
diff --git a/fs/hugetlbfs/inode.c b/fs/hugetlbfs/inode.c
index 32920a10100e..1dcc57189382 100644
--- a/fs/hugetlbfs/inode.c
+++ b/fs/hugetlbfs/inode.c
@@ -27,7 +27,7 @@
 #include <linux/backing-dev.h>
 #include <linux/hugetlb.h>
 #include <linux/pagevec.h>
-#include <linux/parser.h>
+#include <linux/fs_parser.h>
 #include <linux/mman.h>
 #include <linux/slab.h>
 #include <linux/dnotify.h>
@@ -45,11 +45,17 @@ const struct file_operations hugetlbfs_file_operations;
 static const struct inode_operations hugetlbfs_dir_inode_operations;
 static const struct inode_operations hugetlbfs_inode_operations;
 
-struct hugetlbfs_config {
+enum hugetlbfs_size_type { NO_SIZE, SIZE_STD, SIZE_PERCENT };
+
+struct hugetlbfs_fs_context {
 	struct hstate		*hstate;
+	unsigned long long	max_size_opt;
+	unsigned long long	min_size_opt;
 	long			max_hpages;
 	long			nr_inodes;
 	long			min_hpages;
+	enum hugetlbfs_size_type max_val_type;
+	enum hugetlbfs_size_type min_val_type;
 	kuid_t			uid;
 	kgid_t			gid;
 	umode_t			mode;
@@ -57,22 +63,30 @@ struct hugetlbfs_config {
 
 int sysctl_hugetlb_shm_group;
 
-enum {
-	Opt_size, Opt_nr_inodes,
-	Opt_mode, Opt_uid, Opt_gid,
-	Opt_pagesize, Opt_min_size,
-	Opt_err,
+enum hugetlb_param {
+	Opt_gid,
+	Opt_min_size,
+	Opt_mode,
+	Opt_nr_inodes,
+	Opt_pagesize,
+	Opt_size,
+	Opt_uid,
+};
+
+static const struct fs_parameter_spec hugetlb_param_specs[] = {
+	fsparam_u32   ("gid",		Opt_gid),
+	fsparam_string("min_size",	Opt_min_size),
+	fsparam_u32   ("mode",		Opt_mode),
+	fsparam_string("nr_inodes",	Opt_nr_inodes),
+	fsparam_string("pagesize",	Opt_pagesize),
+	fsparam_string("size",		Opt_size),
+	fsparam_u32   ("uid",		Opt_uid),
+	{}
 };
 
-static const match_table_t tokens = {
-	{Opt_size,	"size=%s"},
-	{Opt_nr_inodes,	"nr_inodes=%s"},
-	{Opt_mode,	"mode=%o"},
-	{Opt_uid,	"uid=%u"},
-	{Opt_gid,	"gid=%u"},
-	{Opt_pagesize,	"pagesize=%s"},
-	{Opt_min_size,	"min_size=%s"},
-	{Opt_err,	NULL},
+static const struct fs_parameter_description hugetlb_fs_parameters = {
+	.name		= "hugetlbfs",
+	.specs		= hugetlb_param_specs,
 };
 
 #ifdef CONFIG_NUMA
@@ -426,9 +440,7 @@ static void remove_inode_hugepages(struct inode *inode, loff_t lstart,
 			u32 hash;
 
 			index = page->index;
-			hash = hugetlb_fault_mutex_hash(h, current->mm,
-							&pseudo_vma,
-							mapping, index, 0);
+			hash = hugetlb_fault_mutex_hash(h, mapping, index, 0);
 			mutex_lock(&hugetlb_fault_mutex_table[hash]);
 
 			/*
@@ -485,8 +497,15 @@ static void hugetlbfs_evict_inode(struct inode *inode)
 	struct resv_map *resv_map;
 
 	remove_inode_hugepages(inode, 0, LLONG_MAX);
-	resv_map = (struct resv_map *)inode->i_mapping->private_data;
-	/* root inode doesn't have the resv_map, so we should check it */
+
+	/*
+	 * Get the resv_map from the address space embedded in the inode.
+	 * This is the address space which points to any resv_map allocated
+	 * at inode creation time.  If this is a device special inode,
+	 * i_mapping may not point to the original address space.
+	 */
+	resv_map = (struct resv_map *)(&inode->i_data)->private_data;
+	/* Only regular and link inodes have associated reserve maps */
 	if (resv_map)
 		resv_map_release(&resv_map->refs);
 	clear_inode(inode);
@@ -530,7 +549,7 @@ static long hugetlbfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
 		inode_lock(inode);
 
 		/* protected by i_mutex */
-		if (info->seals & F_SEAL_WRITE) {
+		if (info->seals & (F_SEAL_WRITE | F_SEAL_FUTURE_WRITE)) {
 			inode_unlock(inode);
 			return -EPERM;
 		}
@@ -625,8 +644,7 @@ static long hugetlbfs_fallocate(struct file *file, int mode, loff_t offset,
 		addr = index * hpage_size;
 
 		/* mutex taken here, fault path and hole punch */
-		hash = hugetlb_fault_mutex_hash(h, mm, &pseudo_vma, mapping,
-						index, addr);
+		hash = hugetlb_fault_mutex_hash(h, mapping, index, addr);
 		mutex_lock(&hugetlb_fault_mutex_table[hash]);
 
 		/* See if already present in mapping to avoid alloc/free */
@@ -708,16 +726,16 @@ static int hugetlbfs_setattr(struct dentry *dentry, struct iattr *attr)
 }
 
 static struct inode *hugetlbfs_get_root(struct super_block *sb,
-					struct hugetlbfs_config *config)
+					struct hugetlbfs_fs_context *ctx)
 {
 	struct inode *inode;
 
 	inode = new_inode(sb);
 	if (inode) {
 		inode->i_ino = get_next_ino();
-		inode->i_mode = S_IFDIR | config->mode;
-		inode->i_uid = config->uid;
-		inode->i_gid = config->gid;
+		inode->i_mode = S_IFDIR | ctx->mode;
+		inode->i_uid = ctx->uid;
+		inode->i_gid = ctx->gid;
 		inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
 		inode->i_op = &hugetlbfs_dir_inode_operations;
 		inode->i_fop = &simple_dir_operations;
@@ -741,11 +759,17 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb,
 					umode_t mode, dev_t dev)
 {
 	struct inode *inode;
-	struct resv_map *resv_map;
+	struct resv_map *resv_map = NULL;
 
-	resv_map = resv_map_alloc();
-	if (!resv_map)
-		return NULL;
+	/*
+	 * Reserve maps are only needed for inodes that can have associated
+	 * page allocations.
+	 */
+	if (S_ISREG(mode) || S_ISLNK(mode)) {
+		resv_map = resv_map_alloc();
+		if (!resv_map)
+			return NULL;
+	}
 
 	inode = new_inode(sb);
 	if (inode) {
@@ -780,8 +804,10 @@ static struct inode *hugetlbfs_get_inode(struct super_block *sb,
 			break;
 		}
 		lockdep_annotate_inode_mutex_key(inode);
-	} else
-		kref_put(&resv_map->refs, resv_map_release);
+	} else {
+		if (resv_map)
+			kref_put(&resv_map->refs, resv_map_release);
+	}
 
 	return inode;
 }
@@ -859,6 +885,18 @@ static int hugetlbfs_migrate_page(struct address_space *mapping,
 	rc = migrate_huge_page_move_mapping(mapping, newpage, page);
 	if (rc != MIGRATEPAGE_SUCCESS)
 		return rc;
+
+	/*
+	 * page_private is subpool pointer in hugetlb pages.  Transfer to
+	 * new page.  PagePrivate is not associated with page_private for
+	 * hugetlb pages and can not be set here as only page_huge_active
+	 * pages can be migrated.
+	 */
+	if (page_private(page)) {
+		set_page_private(newpage, page_private(page));
+		set_page_private(page, 0);
+	}
+
 	if (mode != MIGRATE_SYNC_NO_COPY)
 		migrate_page_copy(newpage, page);
 	else
@@ -1017,9 +1055,8 @@ static struct inode *hugetlbfs_alloc_inode(struct super_block *sb)
 	return &p->vfs_inode;
 }
 
-static void hugetlbfs_i_callback(struct rcu_head *head)
+static void hugetlbfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(hugetlbfs_inode_cachep, HUGETLBFS_I(inode));
 }
 
@@ -1027,7 +1064,6 @@ static void hugetlbfs_destroy_inode(struct inode *inode)
 {
 	hugetlbfs_inc_free_inodes(HUGETLBFS_SB(inode->i_sb));
 	mpol_free_shared_policy(&HUGETLBFS_I(inode)->policy);
-	call_rcu(&inode->i_rcu, hugetlbfs_i_callback);
 }
 
 static const struct address_space_operations hugetlbfs_aops = {
@@ -1074,6 +1110,7 @@ static const struct inode_operations hugetlbfs_inode_operations = {
 
 static const struct super_operations hugetlbfs_ops = {
 	.alloc_inode    = hugetlbfs_alloc_inode,
+	.free_inode     = hugetlbfs_free_inode,
 	.destroy_inode  = hugetlbfs_destroy_inode,
 	.evict_inode	= hugetlbfs_evict_inode,
 	.statfs		= hugetlbfs_statfs,
@@ -1081,8 +1118,6 @@ static const struct super_operations hugetlbfs_ops = {
 	.show_options	= hugetlbfs_show_options,
 };
 
-enum hugetlbfs_size_type { NO_SIZE, SIZE_STD, SIZE_PERCENT };
-
 /*
  * Convert size option passed from command line to number of huge pages
  * in the pool specified by hstate.  Size option could be in bytes
@@ -1105,170 +1140,151 @@ hugetlbfs_size_to_hpages(struct hstate *h, unsigned long long size_opt,
 	return size_opt;
 }
 
-static int
-hugetlbfs_parse_options(char *options, struct hugetlbfs_config *pconfig)
+/*
+ * Parse one mount parameter.
+ */
+static int hugetlbfs_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
-	char *p, *rest;
-	substring_t args[MAX_OPT_ARGS];
-	int option;
-	unsigned long long max_size_opt = 0, min_size_opt = 0;
-	enum hugetlbfs_size_type max_val_type = NO_SIZE, min_val_type = NO_SIZE;
-
-	if (!options)
+	struct hugetlbfs_fs_context *ctx = fc->fs_private;
+	struct fs_parse_result result;
+	char *rest;
+	unsigned long ps;
+	int opt;
+
+	opt = fs_parse(fc, &hugetlb_fs_parameters, param, &result);
+	if (opt < 0)
+		return opt;
+
+	switch (opt) {
+	case Opt_uid:
+		ctx->uid = make_kuid(current_user_ns(), result.uint_32);
+		if (!uid_valid(ctx->uid))
+			goto bad_val;
 		return 0;
 
-	while ((p = strsep(&options, ",")) != NULL) {
-		int token;
-		if (!*p)
-			continue;
+	case Opt_gid:
+		ctx->gid = make_kgid(current_user_ns(), result.uint_32);
+		if (!gid_valid(ctx->gid))
+			goto bad_val;
+		return 0;
 
-		token = match_token(p, tokens, args);
-		switch (token) {
-		case Opt_uid:
-			if (match_int(&args[0], &option))
- 				goto bad_val;
-			pconfig->uid = make_kuid(current_user_ns(), option);
-			if (!uid_valid(pconfig->uid))
-				goto bad_val;
-			break;
+	case Opt_mode:
+		ctx->mode = result.uint_32 & 01777U;
+		return 0;
 
-		case Opt_gid:
-			if (match_int(&args[0], &option))
- 				goto bad_val;
-			pconfig->gid = make_kgid(current_user_ns(), option);
-			if (!gid_valid(pconfig->gid))
-				goto bad_val;
-			break;
+	case Opt_size:
+		/* memparse() will accept a K/M/G without a digit */
+		if (!isdigit(param->string[0]))
+			goto bad_val;
+		ctx->max_size_opt = memparse(param->string, &rest);
+		ctx->max_val_type = SIZE_STD;
+		if (*rest == '%')
+			ctx->max_val_type = SIZE_PERCENT;
+		return 0;
 
-		case Opt_mode:
-			if (match_octal(&args[0], &option))
- 				goto bad_val;
-			pconfig->mode = option & 01777U;
-			break;
+	case Opt_nr_inodes:
+		/* memparse() will accept a K/M/G without a digit */
+		if (!isdigit(param->string[0]))
+			goto bad_val;
+		ctx->nr_inodes = memparse(param->string, &rest);
+		return 0;
 
-		case Opt_size: {
-			/* memparse() will accept a K/M/G without a digit */
-			if (!isdigit(*args[0].from))
-				goto bad_val;
-			max_size_opt = memparse(args[0].from, &rest);
-			max_val_type = SIZE_STD;
-			if (*rest == '%')
-				max_val_type = SIZE_PERCENT;
-			break;
+	case Opt_pagesize:
+		ps = memparse(param->string, &rest);
+		ctx->hstate = size_to_hstate(ps);
+		if (!ctx->hstate) {
+			pr_err("Unsupported page size %lu MB\n", ps >> 20);
+			return -EINVAL;
 		}
+		return 0;
 
-		case Opt_nr_inodes:
-			/* memparse() will accept a K/M/G without a digit */
-			if (!isdigit(*args[0].from))
-				goto bad_val;
-			pconfig->nr_inodes = memparse(args[0].from, &rest);
-			break;
+	case Opt_min_size:
+		/* memparse() will accept a K/M/G without a digit */
+		if (!isdigit(param->string[0]))
+			goto bad_val;
+		ctx->min_size_opt = memparse(param->string, &rest);
+		ctx->min_val_type = SIZE_STD;
+		if (*rest == '%')
+			ctx->min_val_type = SIZE_PERCENT;
+		return 0;
 
-		case Opt_pagesize: {
-			unsigned long ps;
-			ps = memparse(args[0].from, &rest);
-			pconfig->hstate = size_to_hstate(ps);
-			if (!pconfig->hstate) {
-				pr_err("Unsupported page size %lu MB\n",
-					ps >> 20);
-				return -EINVAL;
-			}
-			break;
-		}
+	default:
+		return -EINVAL;
+	}
 
-		case Opt_min_size: {
-			/* memparse() will accept a K/M/G without a digit */
-			if (!isdigit(*args[0].from))
-				goto bad_val;
-			min_size_opt = memparse(args[0].from, &rest);
-			min_val_type = SIZE_STD;
-			if (*rest == '%')
-				min_val_type = SIZE_PERCENT;
-			break;
-		}
+bad_val:
+	return invalf(fc, "hugetlbfs: Bad value '%s' for mount option '%s'\n",
+		      param->string, param->key);
+}
 
-		default:
-			pr_err("Bad mount option: \"%s\"\n", p);
-			return -EINVAL;
-			break;
-		}
-	}
+/*
+ * Validate the parsed options.
+ */
+static int hugetlbfs_validate(struct fs_context *fc)
+{
+	struct hugetlbfs_fs_context *ctx = fc->fs_private;
 
 	/*
 	 * Use huge page pool size (in hstate) to convert the size
 	 * options to number of huge pages.  If NO_SIZE, -1 is returned.
 	 */
-	pconfig->max_hpages = hugetlbfs_size_to_hpages(pconfig->hstate,
-						max_size_opt, max_val_type);
-	pconfig->min_hpages = hugetlbfs_size_to_hpages(pconfig->hstate,
-						min_size_opt, min_val_type);
+	ctx->max_hpages = hugetlbfs_size_to_hpages(ctx->hstate,
+						   ctx->max_size_opt,
+						   ctx->max_val_type);
+	ctx->min_hpages = hugetlbfs_size_to_hpages(ctx->hstate,
+						   ctx->min_size_opt,
+						   ctx->min_val_type);
 
 	/*
 	 * If max_size was specified, then min_size must be smaller
 	 */
-	if (max_val_type > NO_SIZE &&
-	    pconfig->min_hpages > pconfig->max_hpages) {
-		pr_err("minimum size can not be greater than maximum size\n");
+	if (ctx->max_val_type > NO_SIZE &&
+	    ctx->min_hpages > ctx->max_hpages) {
+		pr_err("Minimum size can not be greater than maximum size\n");
 		return -EINVAL;
 	}
 
 	return 0;
-
-bad_val:
-	pr_err("Bad value '%s' for mount option '%s'\n", args[0].from, p);
- 	return -EINVAL;
 }
 
 static int
-hugetlbfs_fill_super(struct super_block *sb, void *data, int silent)
+hugetlbfs_fill_super(struct super_block *sb, struct fs_context *fc)
 {
-	int ret;
-	struct hugetlbfs_config config;
+	struct hugetlbfs_fs_context *ctx = fc->fs_private;
 	struct hugetlbfs_sb_info *sbinfo;
 
-	config.max_hpages = -1; /* No limit on size by default */
-	config.nr_inodes = -1; /* No limit on number of inodes by default */
-	config.uid = current_fsuid();
-	config.gid = current_fsgid();
-	config.mode = 0755;
-	config.hstate = &default_hstate;
-	config.min_hpages = -1; /* No default minimum size */
-	ret = hugetlbfs_parse_options(data, &config);
-	if (ret)
-		return ret;
-
 	sbinfo = kmalloc(sizeof(struct hugetlbfs_sb_info), GFP_KERNEL);
 	if (!sbinfo)
 		return -ENOMEM;
 	sb->s_fs_info = sbinfo;
-	sbinfo->hstate = config.hstate;
 	spin_lock_init(&sbinfo->stat_lock);
-	sbinfo->max_inodes = config.nr_inodes;
-	sbinfo->free_inodes = config.nr_inodes;
-	sbinfo->spool = NULL;
-	sbinfo->uid = config.uid;
-	sbinfo->gid = config.gid;
-	sbinfo->mode = config.mode;
+	sbinfo->hstate		= ctx->hstate;
+	sbinfo->max_inodes	= ctx->nr_inodes;
+	sbinfo->free_inodes	= ctx->nr_inodes;
+	sbinfo->spool		= NULL;
+	sbinfo->uid		= ctx->uid;
+	sbinfo->gid		= ctx->gid;
+	sbinfo->mode		= ctx->mode;
 
 	/*
 	 * Allocate and initialize subpool if maximum or minimum size is
 	 * specified.  Any needed reservations (for minimim size) are taken
 	 * taken when the subpool is created.
 	 */
-	if (config.max_hpages != -1 || config.min_hpages != -1) {
-		sbinfo->spool = hugepage_new_subpool(config.hstate,
-							config.max_hpages,
-							config.min_hpages);
+	if (ctx->max_hpages != -1 || ctx->min_hpages != -1) {
+		sbinfo->spool = hugepage_new_subpool(ctx->hstate,
+						     ctx->max_hpages,
+						     ctx->min_hpages);
 		if (!sbinfo->spool)
 			goto out_free;
 	}
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
-	sb->s_blocksize = huge_page_size(config.hstate);
-	sb->s_blocksize_bits = huge_page_shift(config.hstate);
+	sb->s_blocksize = huge_page_size(ctx->hstate);
+	sb->s_blocksize_bits = huge_page_shift(ctx->hstate);
 	sb->s_magic = HUGETLBFS_MAGIC;
 	sb->s_op = &hugetlbfs_ops;
 	sb->s_time_gran = 1;
-	sb->s_root = d_make_root(hugetlbfs_get_root(sb, &config));
+	sb->s_root = d_make_root(hugetlbfs_get_root(sb, ctx));
 	if (!sb->s_root)
 		goto out_free;
 	return 0;
@@ -1278,16 +1294,52 @@ out_free:
 	return -ENOMEM;
 }
 
-static struct dentry *hugetlbfs_mount(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data)
+static int hugetlbfs_get_tree(struct fs_context *fc)
 {
-	return mount_nodev(fs_type, flags, data, hugetlbfs_fill_super);
+	int err = hugetlbfs_validate(fc);
+	if (err)
+		return err;
+	return vfs_get_super(fc, vfs_get_independent_super, hugetlbfs_fill_super);
+}
+
+static void hugetlbfs_fs_context_free(struct fs_context *fc)
+{
+	kfree(fc->fs_private);
+}
+
+static const struct fs_context_operations hugetlbfs_fs_context_ops = {
+	.free		= hugetlbfs_fs_context_free,
+	.parse_param	= hugetlbfs_parse_param,
+	.get_tree	= hugetlbfs_get_tree,
+};
+
+static int hugetlbfs_init_fs_context(struct fs_context *fc)
+{
+	struct hugetlbfs_fs_context *ctx;
+
+	ctx = kzalloc(sizeof(struct hugetlbfs_fs_context), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->max_hpages	= -1; /* No limit on size by default */
+	ctx->nr_inodes	= -1; /* No limit on number of inodes by default */
+	ctx->uid	= current_fsuid();
+	ctx->gid	= current_fsgid();
+	ctx->mode	= 0755;
+	ctx->hstate	= &default_hstate;
+	ctx->min_hpages	= -1; /* No default minimum size */
+	ctx->max_val_type = NO_SIZE;
+	ctx->min_val_type = NO_SIZE;
+	fc->fs_private = ctx;
+	fc->ops	= &hugetlbfs_fs_context_ops;
+	return 0;
 }
 
 static struct file_system_type hugetlbfs_fs_type = {
-	.name		= "hugetlbfs",
-	.mount		= hugetlbfs_mount,
-	.kill_sb	= kill_litter_super,
+	.name			= "hugetlbfs",
+	.init_fs_context	= hugetlbfs_init_fs_context,
+	.parameters		= &hugetlb_fs_parameters,
+	.kill_sb		= kill_litter_super,
 };
 
 static struct vfsmount *hugetlbfs_vfsmount[HUGE_MAX_HSTATE];
@@ -1372,8 +1424,29 @@ out:
 	return file;
 }
 
+static struct vfsmount *__init mount_one_hugetlbfs(struct hstate *h)
+{
+	struct fs_context *fc;
+	struct vfsmount *mnt;
+
+	fc = fs_context_for_mount(&hugetlbfs_fs_type, SB_KERNMOUNT);
+	if (IS_ERR(fc)) {
+		mnt = ERR_CAST(fc);
+	} else {
+		struct hugetlbfs_fs_context *ctx = fc->fs_private;
+		ctx->hstate = h;
+		mnt = fc_mount(fc);
+		put_fs_context(fc);
+	}
+	if (IS_ERR(mnt))
+		pr_err("Cannot mount internal hugetlbfs for page size %uK",
+		       1U << (h->order + PAGE_SHIFT - 10));
+	return mnt;
+}
+
 static int __init init_hugetlbfs_fs(void)
 {
+	struct vfsmount *mnt;
 	struct hstate *h;
 	int error;
 	int i;
@@ -1396,24 +1469,16 @@ static int __init init_hugetlbfs_fs(void)
 
 	i = 0;
 	for_each_hstate(h) {
-		char buf[50];
-		unsigned ps_kb = 1U << (h->order + PAGE_SHIFT - 10);
-
-		snprintf(buf, sizeof(buf), "pagesize=%uK", ps_kb);
-		hugetlbfs_vfsmount[i] = kern_mount_data(&hugetlbfs_fs_type,
-							buf);
-
-		if (IS_ERR(hugetlbfs_vfsmount[i])) {
-			pr_err("Cannot mount internal hugetlbfs for "
-				"page size %uK", ps_kb);
-			error = PTR_ERR(hugetlbfs_vfsmount[i]);
-			hugetlbfs_vfsmount[i] = NULL;
+		mnt = mount_one_hugetlbfs(h);
+		if (IS_ERR(mnt) && i == 0) {
+			error = PTR_ERR(mnt);
+			goto out;
 		}
+		hugetlbfs_vfsmount[i] = mnt;
 		i++;
 	}
-	/* Non default hstates are optional */
-	if (!IS_ERR_OR_NULL(hugetlbfs_vfsmount[default_hstate_idx]))
-		return 0;
+
+	return 0;
 
  out:
 	kmem_cache_destroy(hugetlbfs_inode_cachep);
diff --git a/fs/inode.c b/fs/inode.c
index 73432e64f874..0f1e3b563c47 100644
--- a/fs/inode.c
+++ b/fs/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * (C) 1997 Linus Torvalds
  * (C) 1999 Andrea Arcangeli <andrea@suse.de> (dynamic inode allocation)
@@ -202,12 +203,28 @@ out:
 }
 EXPORT_SYMBOL(inode_init_always);
 
+void free_inode_nonrcu(struct inode *inode)
+{
+	kmem_cache_free(inode_cachep, inode);
+}
+EXPORT_SYMBOL(free_inode_nonrcu);
+
+static void i_callback(struct rcu_head *head)
+{
+	struct inode *inode = container_of(head, struct inode, i_rcu);
+	if (inode->free_inode)
+		inode->free_inode(inode);
+	else
+		free_inode_nonrcu(inode);
+}
+
 static struct inode *alloc_inode(struct super_block *sb)
 {
+	const struct super_operations *ops = sb->s_op;
 	struct inode *inode;
 
-	if (sb->s_op->alloc_inode)
-		inode = sb->s_op->alloc_inode(sb);
+	if (ops->alloc_inode)
+		inode = ops->alloc_inode(sb);
 	else
 		inode = kmem_cache_alloc(inode_cachep, GFP_KERNEL);
 
@@ -215,22 +232,19 @@ static struct inode *alloc_inode(struct super_block *sb)
 		return NULL;
 
 	if (unlikely(inode_init_always(sb, inode))) {
-		if (inode->i_sb->s_op->destroy_inode)
-			inode->i_sb->s_op->destroy_inode(inode);
-		else
-			kmem_cache_free(inode_cachep, inode);
+		if (ops->destroy_inode) {
+			ops->destroy_inode(inode);
+			if (!ops->free_inode)
+				return NULL;
+		}
+		inode->free_inode = ops->free_inode;
+		i_callback(&inode->i_rcu);
 		return NULL;
 	}
 
 	return inode;
 }
 
-void free_inode_nonrcu(struct inode *inode)
-{
-	kmem_cache_free(inode_cachep, inode);
-}
-EXPORT_SYMBOL(free_inode_nonrcu);
-
 void __destroy_inode(struct inode *inode)
 {
 	BUG_ON(inode_has_buffers(inode));
@@ -253,20 +267,19 @@ void __destroy_inode(struct inode *inode)
 }
 EXPORT_SYMBOL(__destroy_inode);
 
-static void i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kmem_cache_free(inode_cachep, inode);
-}
-
 static void destroy_inode(struct inode *inode)
 {
+	const struct super_operations *ops = inode->i_sb->s_op;
+
 	BUG_ON(!list_empty(&inode->i_lru));
 	__destroy_inode(inode);
-	if (inode->i_sb->s_op->destroy_inode)
-		inode->i_sb->s_op->destroy_inode(inode);
-	else
-		call_rcu(&inode->i_rcu, i_callback);
+	if (ops->destroy_inode) {
+		ops->destroy_inode(inode);
+		if (!ops->free_inode)
+			return;
+	}
+	inode->free_inode = ops->free_inode;
+	call_rcu(&inode->i_rcu, i_callback);
 }
 
 /**
@@ -349,7 +362,7 @@ EXPORT_SYMBOL(inc_nlink);
 
 static void __address_space_init_once(struct address_space *mapping)
 {
-	xa_init_flags(&mapping->i_pages, XA_FLAGS_LOCK_IRQ);
+	xa_init_flags(&mapping->i_pages, XA_FLAGS_LOCK_IRQ | XA_FLAGS_ACCOUNT);
 	init_rwsem(&mapping->i_mmap_rwsem);
 	INIT_LIST_HEAD(&mapping->private_list);
 	spin_lock_init(&mapping->private_lock);
@@ -1601,7 +1614,7 @@ EXPORT_SYMBOL(bmap);
  * passed since the last atime update.
  */
 static int relatime_need_update(struct vfsmount *mnt, struct inode *inode,
-			     struct timespec now)
+			     struct timespec64 now)
 {
 
 	if (!(mnt->mnt_flags & MNT_RELATIME))
@@ -1702,7 +1715,7 @@ bool atime_needs_update(const struct path *path, struct inode *inode)
 
 	now = current_time(inode);
 
-	if (!relatime_need_update(mnt, inode, timespec64_to_timespec(now)))
+	if (!relatime_need_update(mnt, inode, now))
 		return false;
 
 	if (timespec64_equal(&inode->i_atime, &now))
@@ -1817,8 +1830,13 @@ int file_remove_privs(struct file *file)
 	int kill;
 	int error = 0;
 
-	/* Fast path for nothing security related */
-	if (IS_NOSEC(inode))
+	/*
+	 * Fast path for nothing security related.
+	 * As well for non-regular files, e.g. blkdev inodes.
+	 * For example, blkdev_write_iter() might get here
+	 * trying to remove privs which it is not allowed to.
+	 */
+	if (IS_NOSEC(inode) || !S_ISREG(inode->i_mode))
 		return 0;
 
 	kill = dentry_needs_remove_privs(dentry);
@@ -1881,6 +1899,26 @@ int file_update_time(struct file *file)
 }
 EXPORT_SYMBOL(file_update_time);
 
+/* Caller must hold the file's inode lock */
+int file_modified(struct file *file)
+{
+	int err;
+
+	/*
+	 * Clear the security bits if the process is not being run by root.
+	 * This keeps people from modifying setuid and setgid binaries.
+	 */
+	err = file_remove_privs(file);
+	if (err)
+		return err;
+
+	if (unlikely(file->f_mode & FMODE_NOCMTIME))
+		return 0;
+
+	return file_update_time(file);
+}
+EXPORT_SYMBOL(file_modified);
+
 int inode_needs_sync(struct inode *inode)
 {
 	if (IS_SYNC(inode))
@@ -2093,14 +2131,8 @@ EXPORT_SYMBOL(inode_dio_wait);
 void inode_set_flags(struct inode *inode, unsigned int flags,
 		     unsigned int mask)
 {
-	unsigned int old_flags, new_flags;
-
 	WARN_ON_ONCE(flags & ~mask);
-	do {
-		old_flags = READ_ONCE(inode->i_flags);
-		new_flags = (old_flags & ~mask) | flags;
-	} while (unlikely(cmpxchg(&inode->i_flags, old_flags,
-				  new_flags) != old_flags));
+	set_mask_bits(&inode->i_flags, mask, flags);
 }
 EXPORT_SYMBOL(inode_set_flags);
 
@@ -2158,3 +2190,89 @@ struct timespec64 current_time(struct inode *inode)
 	return timespec64_trunc(now, inode->i_sb->s_time_gran);
 }
 EXPORT_SYMBOL(current_time);
+
+/*
+ * Generic function to check FS_IOC_SETFLAGS values and reject any invalid
+ * configurations.
+ *
+ * Note: the caller should be holding i_mutex, or else be sure that they have
+ * exclusive access to the inode structure.
+ */
+int vfs_ioc_setflags_prepare(struct inode *inode, unsigned int oldflags,
+			     unsigned int flags)
+{
+	/*
+	 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
+	 * the relevant capability.
+	 *
+	 * This test looks nicer. Thanks to Pauline Middelink
+	 */
+	if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL) &&
+	    !capable(CAP_LINUX_IMMUTABLE))
+		return -EPERM;
+
+	return 0;
+}
+EXPORT_SYMBOL(vfs_ioc_setflags_prepare);
+
+/*
+ * Generic function to check FS_IOC_FSSETXATTR values and reject any invalid
+ * configurations.
+ *
+ * Note: the caller should be holding i_mutex, or else be sure that they have
+ * exclusive access to the inode structure.
+ */
+int vfs_ioc_fssetxattr_check(struct inode *inode, const struct fsxattr *old_fa,
+			     struct fsxattr *fa)
+{
+	/*
+	 * Can't modify an immutable/append-only file unless we have
+	 * appropriate permission.
+	 */
+	if ((old_fa->fsx_xflags ^ fa->fsx_xflags) &
+			(FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND) &&
+	    !capable(CAP_LINUX_IMMUTABLE))
+		return -EPERM;
+
+	/*
+	 * Project Quota ID state is only allowed to change from within the init
+	 * namespace. Enforce that restriction only if we are trying to change
+	 * the quota ID state. Everything else is allowed in user namespaces.
+	 */
+	if (current_user_ns() != &init_user_ns) {
+		if (old_fa->fsx_projid != fa->fsx_projid)
+			return -EINVAL;
+		if ((old_fa->fsx_xflags ^ fa->fsx_xflags) &
+				FS_XFLAG_PROJINHERIT)
+			return -EINVAL;
+	}
+
+	/* Check extent size hints. */
+	if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(inode->i_mode))
+		return -EINVAL;
+
+	if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
+			!S_ISDIR(inode->i_mode))
+		return -EINVAL;
+
+	if ((fa->fsx_xflags & FS_XFLAG_COWEXTSIZE) &&
+	    !S_ISREG(inode->i_mode) && !S_ISDIR(inode->i_mode))
+		return -EINVAL;
+
+	/*
+	 * It is only valid to set the DAX flag on regular files and
+	 * directories on filesystems.
+	 */
+	if ((fa->fsx_xflags & FS_XFLAG_DAX) &&
+	    !(S_ISREG(inode->i_mode) || S_ISDIR(inode->i_mode)))
+		return -EINVAL;
+
+	/* Extent size hints of zero turn off the flags. */
+	if (fa->fsx_extsize == 0)
+		fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
+	if (fa->fsx_cowextsize == 0)
+		fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
+
+	return 0;
+}
+EXPORT_SYMBOL(vfs_ioc_fssetxattr_check);
diff --git a/fs/internal.h b/fs/internal.h
index d410186bc369..2f3c3de51fad 100644
--- a/fs/internal.h
+++ b/fs/internal.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* fs/ internal definitions
  *
  * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 struct super_block;
@@ -17,6 +13,7 @@ struct linux_binprm;
 struct path;
 struct mount;
 struct shrink_control;
+struct fs_context;
 
 /*
  * block_dev.c
@@ -43,8 +40,6 @@ static inline int __sync_blockdev(struct block_device *bdev, int wait)
 extern void guard_bio_eod(int rw, struct bio *bio);
 extern int __block_write_begin_int(struct page *page, loff_t pos, unsigned len,
 		get_block_t *get_block, struct iomap *iomap);
-int __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
-		struct page *page);
 
 /*
  * char_dev.c
@@ -52,8 +47,19 @@ int __generic_write_end(struct inode *inode, loff_t pos, unsigned copied,
 extern void __init chrdev_init(void);
 
 /*
+ * fs_context.c
+ */
+extern const struct fs_context_operations legacy_fs_context_ops;
+extern int parse_monolithic_mount_data(struct fs_context *, void *);
+extern void fc_drop_locked(struct fs_context *);
+extern void vfs_clean_context(struct fs_context *fc);
+extern int finish_clean_context(struct fs_context *fc);
+
+/*
  * namei.c
  */
+extern int filename_lookup(int dfd, struct filename *name, unsigned flags,
+			   struct path *path, struct path *root);
 extern int user_path_mountpoint_at(int, const char __user *, unsigned int, struct path *);
 extern int vfs_path_lookup(struct dentry *, struct vfsmount *,
 			   const char *, unsigned int, struct path *);
@@ -80,11 +86,10 @@ extern int sb_prepare_remount_readonly(struct super_block *);
 
 extern void __init mnt_init(void);
 
-extern int __mnt_want_write(struct vfsmount *);
 extern int __mnt_want_write_file(struct file *);
-extern void __mnt_drop_write(struct vfsmount *);
 extern void __mnt_drop_write_file(struct file *);
 
+extern void dissolve_on_fput(struct vfsmount *);
 /*
  * fs_struct.c
  */
@@ -99,10 +104,8 @@ extern struct file *alloc_empty_file_noaccount(int, const struct cred *);
 /*
  * super.c
  */
-extern int do_remount_sb(struct super_block *, int, void *, int);
+extern int reconfigure_super(struct fs_context *);
 extern bool trylock_super(struct super_block *sb);
-extern struct dentry *mount_fs(struct file_system_type *,
-			       int, const char *, void *);
 extern struct super_block *user_get_super(dev_t);
 
 /*
@@ -150,6 +153,7 @@ extern struct dentry *__d_alloc(struct super_block *, const struct qstr *);
 extern int d_set_mounted(struct dentry *dentry);
 extern long prune_dcache_sb(struct super_block *sb, struct shrink_control *sc);
 extern struct dentry *d_alloc_cursor(struct dentry *);
+extern struct dentry * d_alloc_pseudo(struct super_block *, const struct qstr *);
 
 /*
  * read_write.c
diff --git a/fs/io_uring.c b/fs/io_uring.c
new file mode 100644
index 000000000000..d682049c07b2
--- /dev/null
+++ b/fs/io_uring.c
@@ -0,0 +1,3468 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Shared application/kernel submission and completion ring pairs, for
+ * supporting fast/efficient IO.
+ *
+ * A note on the read/write ordering memory barriers that are matched between
+ * the application and kernel side.
+ *
+ * After the application reads the CQ ring tail, it must use an
+ * appropriate smp_rmb() to pair with the smp_wmb() the kernel uses
+ * before writing the tail (using smp_load_acquire to read the tail will
+ * do). It also needs a smp_mb() before updating CQ head (ordering the
+ * entry load(s) with the head store), pairing with an implicit barrier
+ * through a control-dependency in io_get_cqring (smp_store_release to
+ * store head will do). Failure to do so could lead to reading invalid
+ * CQ entries.
+ *
+ * Likewise, the application must use an appropriate smp_wmb() before
+ * writing the SQ tail (ordering SQ entry stores with the tail store),
+ * which pairs with smp_load_acquire in io_get_sqring (smp_store_release
+ * to store the tail will do). And it needs a barrier ordering the SQ
+ * head load before writing new SQ entries (smp_load_acquire to read
+ * head will do).
+ *
+ * When using the SQ poll thread (IORING_SETUP_SQPOLL), the application
+ * needs to check the SQ flags for IORING_SQ_NEED_WAKEUP *after*
+ * updating the SQ tail; a full memory barrier smp_mb() is needed
+ * between.
+ *
+ * Also see the examples in the liburing library:
+ *
+ *	git://git.kernel.dk/liburing
+ *
+ * io_uring also uses READ/WRITE_ONCE() for _any_ store or load that happens
+ * from data shared between the kernel and application. This is done both
+ * for ordering purposes, but also to ensure that once a value is loaded from
+ * data that the application could potentially modify, it remains stable.
+ *
+ * Copyright (C) 2018-2019 Jens Axboe
+ * Copyright (c) 2018-2019 Christoph Hellwig
+ */
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/errno.h>
+#include <linux/syscalls.h>
+#include <linux/compat.h>
+#include <linux/refcount.h>
+#include <linux/uio.h>
+
+#include <linux/sched/signal.h>
+#include <linux/fs.h>
+#include <linux/file.h>
+#include <linux/fdtable.h>
+#include <linux/mm.h>
+#include <linux/mman.h>
+#include <linux/mmu_context.h>
+#include <linux/percpu.h>
+#include <linux/slab.h>
+#include <linux/workqueue.h>
+#include <linux/kthread.h>
+#include <linux/blkdev.h>
+#include <linux/bvec.h>
+#include <linux/net.h>
+#include <net/sock.h>
+#include <net/af_unix.h>
+#include <net/scm.h>
+#include <linux/anon_inodes.h>
+#include <linux/sched/mm.h>
+#include <linux/uaccess.h>
+#include <linux/nospec.h>
+#include <linux/sizes.h>
+#include <linux/hugetlb.h>
+
+#include <uapi/linux/io_uring.h>
+
+#include "internal.h"
+
+#define IORING_MAX_ENTRIES	4096
+#define IORING_MAX_FIXED_FILES	1024
+
+struct io_uring {
+	u32 head ____cacheline_aligned_in_smp;
+	u32 tail ____cacheline_aligned_in_smp;
+};
+
+/*
+ * This data is shared with the application through the mmap at offset
+ * IORING_OFF_SQ_RING.
+ *
+ * The offsets to the member fields are published through struct
+ * io_sqring_offsets when calling io_uring_setup.
+ */
+struct io_sq_ring {
+	/*
+	 * Head and tail offsets into the ring; the offsets need to be
+	 * masked to get valid indices.
+	 *
+	 * The kernel controls head and the application controls tail.
+	 */
+	struct io_uring		r;
+	/*
+	 * Bitmask to apply to head and tail offsets (constant, equals
+	 * ring_entries - 1)
+	 */
+	u32			ring_mask;
+	/* Ring size (constant, power of 2) */
+	u32			ring_entries;
+	/*
+	 * Number of invalid entries dropped by the kernel due to
+	 * invalid index stored in array
+	 *
+	 * Written by the kernel, shouldn't be modified by the
+	 * application (i.e. get number of "new events" by comparing to
+	 * cached value).
+	 *
+	 * After a new SQ head value was read by the application this
+	 * counter includes all submissions that were dropped reaching
+	 * the new SQ head (and possibly more).
+	 */
+	u32			dropped;
+	/*
+	 * Runtime flags
+	 *
+	 * Written by the kernel, shouldn't be modified by the
+	 * application.
+	 *
+	 * The application needs a full memory barrier before checking
+	 * for IORING_SQ_NEED_WAKEUP after updating the sq tail.
+	 */
+	u32			flags;
+	/*
+	 * Ring buffer of indices into array of io_uring_sqe, which is
+	 * mmapped by the application using the IORING_OFF_SQES offset.
+	 *
+	 * This indirection could e.g. be used to assign fixed
+	 * io_uring_sqe entries to operations and only submit them to
+	 * the queue when needed.
+	 *
+	 * The kernel modifies neither the indices array nor the entries
+	 * array.
+	 */
+	u32			array[];
+};
+
+/*
+ * This data is shared with the application through the mmap at offset
+ * IORING_OFF_CQ_RING.
+ *
+ * The offsets to the member fields are published through struct
+ * io_cqring_offsets when calling io_uring_setup.
+ */
+struct io_cq_ring {
+	/*
+	 * Head and tail offsets into the ring; the offsets need to be
+	 * masked to get valid indices.
+	 *
+	 * The application controls head and the kernel tail.
+	 */
+	struct io_uring		r;
+	/*
+	 * Bitmask to apply to head and tail offsets (constant, equals
+	 * ring_entries - 1)
+	 */
+	u32			ring_mask;
+	/* Ring size (constant, power of 2) */
+	u32			ring_entries;
+	/*
+	 * Number of completion events lost because the queue was full;
+	 * this should be avoided by the application by making sure
+	 * there are not more requests pending thatn there is space in
+	 * the completion queue.
+	 *
+	 * Written by the kernel, shouldn't be modified by the
+	 * application (i.e. get number of "new events" by comparing to
+	 * cached value).
+	 *
+	 * As completion events come in out of order this counter is not
+	 * ordered with any other data.
+	 */
+	u32			overflow;
+	/*
+	 * Ring buffer of completion events.
+	 *
+	 * The kernel writes completion events fresh every time they are
+	 * produced, so the application is allowed to modify pending
+	 * entries.
+	 */
+	struct io_uring_cqe	cqes[];
+};
+
+struct io_mapped_ubuf {
+	u64		ubuf;
+	size_t		len;
+	struct		bio_vec *bvec;
+	unsigned int	nr_bvecs;
+};
+
+struct async_list {
+	spinlock_t		lock;
+	atomic_t		cnt;
+	struct list_head	list;
+
+	struct file		*file;
+	off_t			io_end;
+	size_t			io_pages;
+};
+
+struct io_ring_ctx {
+	struct {
+		struct percpu_ref	refs;
+	} ____cacheline_aligned_in_smp;
+
+	struct {
+		unsigned int		flags;
+		bool			compat;
+		bool			account_mem;
+
+		/* SQ ring */
+		struct io_sq_ring	*sq_ring;
+		unsigned		cached_sq_head;
+		unsigned		sq_entries;
+		unsigned		sq_mask;
+		unsigned		sq_thread_idle;
+		struct io_uring_sqe	*sq_sqes;
+
+		struct list_head	defer_list;
+	} ____cacheline_aligned_in_smp;
+
+	/* IO offload */
+	struct workqueue_struct	*sqo_wq;
+	struct task_struct	*sqo_thread;	/* if using sq thread polling */
+	struct mm_struct	*sqo_mm;
+	wait_queue_head_t	sqo_wait;
+	struct completion	sqo_thread_started;
+
+	struct {
+		/* CQ ring */
+		struct io_cq_ring	*cq_ring;
+		unsigned		cached_cq_tail;
+		unsigned		cq_entries;
+		unsigned		cq_mask;
+		struct wait_queue_head	cq_wait;
+		struct fasync_struct	*cq_fasync;
+		struct eventfd_ctx	*cq_ev_fd;
+	} ____cacheline_aligned_in_smp;
+
+	/*
+	 * If used, fixed file set. Writers must ensure that ->refs is dead,
+	 * readers must ensure that ->refs is alive as long as the file* is
+	 * used. Only updated through io_uring_register(2).
+	 */
+	struct file		**user_files;
+	unsigned		nr_user_files;
+
+	/* if used, fixed mapped user buffers */
+	unsigned		nr_user_bufs;
+	struct io_mapped_ubuf	*user_bufs;
+
+	struct user_struct	*user;
+
+	struct completion	ctx_done;
+
+	struct {
+		struct mutex		uring_lock;
+		wait_queue_head_t	wait;
+	} ____cacheline_aligned_in_smp;
+
+	struct {
+		spinlock_t		completion_lock;
+		bool			poll_multi_file;
+		/*
+		 * ->poll_list is protected by the ctx->uring_lock for
+		 * io_uring instances that don't use IORING_SETUP_SQPOLL.
+		 * For SQPOLL, only the single threaded io_sq_thread() will
+		 * manipulate the list, hence no extra locking is needed there.
+		 */
+		struct list_head	poll_list;
+		struct list_head	cancel_list;
+	} ____cacheline_aligned_in_smp;
+
+	struct async_list	pending_async[2];
+
+#if defined(CONFIG_UNIX)
+	struct socket		*ring_sock;
+#endif
+};
+
+struct sqe_submit {
+	const struct io_uring_sqe	*sqe;
+	unsigned short			index;
+	bool				has_user;
+	bool				needs_lock;
+	bool				needs_fixed_file;
+};
+
+/*
+ * First field must be the file pointer in all the
+ * iocb unions! See also 'struct kiocb' in <linux/fs.h>
+ */
+struct io_poll_iocb {
+	struct file			*file;
+	struct wait_queue_head		*head;
+	__poll_t			events;
+	bool				done;
+	bool				canceled;
+	struct wait_queue_entry		wait;
+};
+
+/*
+ * NOTE! Each of the iocb union members has the file pointer
+ * as the first entry in their struct definition. So you can
+ * access the file pointer through any of the sub-structs,
+ * or directly as just 'ki_filp' in this struct.
+ */
+struct io_kiocb {
+	union {
+		struct file		*file;
+		struct kiocb		rw;
+		struct io_poll_iocb	poll;
+	};
+
+	struct sqe_submit	submit;
+
+	struct io_ring_ctx	*ctx;
+	struct list_head	list;
+	struct list_head	link_list;
+	unsigned int		flags;
+	refcount_t		refs;
+#define REQ_F_NOWAIT		1	/* must not punt to workers */
+#define REQ_F_IOPOLL_COMPLETED	2	/* polled IO has completed */
+#define REQ_F_FIXED_FILE	4	/* ctx owns file */
+#define REQ_F_SEQ_PREV		8	/* sequential with previous */
+#define REQ_F_IO_DRAIN		16	/* drain existing IO first */
+#define REQ_F_IO_DRAINED	32	/* drain done */
+#define REQ_F_LINK		64	/* linked sqes */
+#define REQ_F_FAIL_LINK		128	/* fail rest of links */
+	u64			user_data;
+	u32			result;
+	u32			sequence;
+
+	struct work_struct	work;
+};
+
+#define IO_PLUG_THRESHOLD		2
+#define IO_IOPOLL_BATCH			8
+
+struct io_submit_state {
+	struct blk_plug		plug;
+
+	/*
+	 * io_kiocb alloc cache
+	 */
+	void			*reqs[IO_IOPOLL_BATCH];
+	unsigned		int free_reqs;
+	unsigned		int cur_req;
+
+	/*
+	 * File reference cache
+	 */
+	struct file		*file;
+	unsigned int		fd;
+	unsigned int		has_refs;
+	unsigned int		used_refs;
+	unsigned int		ios_left;
+};
+
+static void io_sq_wq_submit_work(struct work_struct *work);
+
+static struct kmem_cache *req_cachep;
+
+static const struct file_operations io_uring_fops;
+
+struct sock *io_uring_get_socket(struct file *file)
+{
+#if defined(CONFIG_UNIX)
+	if (file->f_op == &io_uring_fops) {
+		struct io_ring_ctx *ctx = file->private_data;
+
+		return ctx->ring_sock->sk;
+	}
+#endif
+	return NULL;
+}
+EXPORT_SYMBOL(io_uring_get_socket);
+
+static void io_ring_ctx_ref_free(struct percpu_ref *ref)
+{
+	struct io_ring_ctx *ctx = container_of(ref, struct io_ring_ctx, refs);
+
+	complete(&ctx->ctx_done);
+}
+
+static struct io_ring_ctx *io_ring_ctx_alloc(struct io_uring_params *p)
+{
+	struct io_ring_ctx *ctx;
+	int i;
+
+	ctx = kzalloc(sizeof(*ctx), GFP_KERNEL);
+	if (!ctx)
+		return NULL;
+
+	if (percpu_ref_init(&ctx->refs, io_ring_ctx_ref_free,
+			    PERCPU_REF_ALLOW_REINIT, GFP_KERNEL)) {
+		kfree(ctx);
+		return NULL;
+	}
+
+	ctx->flags = p->flags;
+	init_waitqueue_head(&ctx->cq_wait);
+	init_completion(&ctx->ctx_done);
+	init_completion(&ctx->sqo_thread_started);
+	mutex_init(&ctx->uring_lock);
+	init_waitqueue_head(&ctx->wait);
+	for (i = 0; i < ARRAY_SIZE(ctx->pending_async); i++) {
+		spin_lock_init(&ctx->pending_async[i].lock);
+		INIT_LIST_HEAD(&ctx->pending_async[i].list);
+		atomic_set(&ctx->pending_async[i].cnt, 0);
+	}
+	spin_lock_init(&ctx->completion_lock);
+	INIT_LIST_HEAD(&ctx->poll_list);
+	INIT_LIST_HEAD(&ctx->cancel_list);
+	INIT_LIST_HEAD(&ctx->defer_list);
+	return ctx;
+}
+
+static inline bool io_sequence_defer(struct io_ring_ctx *ctx,
+				     struct io_kiocb *req)
+{
+	if ((req->flags & (REQ_F_IO_DRAIN|REQ_F_IO_DRAINED)) != REQ_F_IO_DRAIN)
+		return false;
+
+	return req->sequence > ctx->cached_cq_tail + ctx->sq_ring->dropped;
+}
+
+static struct io_kiocb *io_get_deferred_req(struct io_ring_ctx *ctx)
+{
+	struct io_kiocb *req;
+
+	if (list_empty(&ctx->defer_list))
+		return NULL;
+
+	req = list_first_entry(&ctx->defer_list, struct io_kiocb, list);
+	if (!io_sequence_defer(ctx, req)) {
+		list_del_init(&req->list);
+		return req;
+	}
+
+	return NULL;
+}
+
+static void __io_commit_cqring(struct io_ring_ctx *ctx)
+{
+	struct io_cq_ring *ring = ctx->cq_ring;
+
+	if (ctx->cached_cq_tail != READ_ONCE(ring->r.tail)) {
+		/* order cqe stores with ring update */
+		smp_store_release(&ring->r.tail, ctx->cached_cq_tail);
+
+		if (wq_has_sleeper(&ctx->cq_wait)) {
+			wake_up_interruptible(&ctx->cq_wait);
+			kill_fasync(&ctx->cq_fasync, SIGIO, POLL_IN);
+		}
+	}
+}
+
+static void io_commit_cqring(struct io_ring_ctx *ctx)
+{
+	struct io_kiocb *req;
+
+	__io_commit_cqring(ctx);
+
+	while ((req = io_get_deferred_req(ctx)) != NULL) {
+		req->flags |= REQ_F_IO_DRAINED;
+		queue_work(ctx->sqo_wq, &req->work);
+	}
+}
+
+static struct io_uring_cqe *io_get_cqring(struct io_ring_ctx *ctx)
+{
+	struct io_cq_ring *ring = ctx->cq_ring;
+	unsigned tail;
+
+	tail = ctx->cached_cq_tail;
+	/*
+	 * writes to the cq entry need to come after reading head; the
+	 * control dependency is enough as we're using WRITE_ONCE to
+	 * fill the cq entry
+	 */
+	if (tail - READ_ONCE(ring->r.head) == ring->ring_entries)
+		return NULL;
+
+	ctx->cached_cq_tail++;
+	return &ring->cqes[tail & ctx->cq_mask];
+}
+
+static void io_cqring_fill_event(struct io_ring_ctx *ctx, u64 ki_user_data,
+				 long res)
+{
+	struct io_uring_cqe *cqe;
+
+	/*
+	 * If we can't get a cq entry, userspace overflowed the
+	 * submission (by quite a lot). Increment the overflow count in
+	 * the ring.
+	 */
+	cqe = io_get_cqring(ctx);
+	if (cqe) {
+		WRITE_ONCE(cqe->user_data, ki_user_data);
+		WRITE_ONCE(cqe->res, res);
+		WRITE_ONCE(cqe->flags, 0);
+	} else {
+		unsigned overflow = READ_ONCE(ctx->cq_ring->overflow);
+
+		WRITE_ONCE(ctx->cq_ring->overflow, overflow + 1);
+	}
+}
+
+static void io_cqring_ev_posted(struct io_ring_ctx *ctx)
+{
+	if (waitqueue_active(&ctx->wait))
+		wake_up(&ctx->wait);
+	if (waitqueue_active(&ctx->sqo_wait))
+		wake_up(&ctx->sqo_wait);
+	if (ctx->cq_ev_fd)
+		eventfd_signal(ctx->cq_ev_fd, 1);
+}
+
+static void io_cqring_add_event(struct io_ring_ctx *ctx, u64 user_data,
+				long res)
+{
+	unsigned long flags;
+
+	spin_lock_irqsave(&ctx->completion_lock, flags);
+	io_cqring_fill_event(ctx, user_data, res);
+	io_commit_cqring(ctx);
+	spin_unlock_irqrestore(&ctx->completion_lock, flags);
+
+	io_cqring_ev_posted(ctx);
+}
+
+static void io_ring_drop_ctx_refs(struct io_ring_ctx *ctx, unsigned refs)
+{
+	percpu_ref_put_many(&ctx->refs, refs);
+
+	if (waitqueue_active(&ctx->wait))
+		wake_up(&ctx->wait);
+}
+
+static struct io_kiocb *io_get_req(struct io_ring_ctx *ctx,
+				   struct io_submit_state *state)
+{
+	gfp_t gfp = GFP_KERNEL | __GFP_NOWARN;
+	struct io_kiocb *req;
+
+	if (!percpu_ref_tryget(&ctx->refs))
+		return NULL;
+
+	if (!state) {
+		req = kmem_cache_alloc(req_cachep, gfp);
+		if (unlikely(!req))
+			goto out;
+	} else if (!state->free_reqs) {
+		size_t sz;
+		int ret;
+
+		sz = min_t(size_t, state->ios_left, ARRAY_SIZE(state->reqs));
+		ret = kmem_cache_alloc_bulk(req_cachep, gfp, sz, state->reqs);
+
+		/*
+		 * Bulk alloc is all-or-nothing. If we fail to get a batch,
+		 * retry single alloc to be on the safe side.
+		 */
+		if (unlikely(ret <= 0)) {
+			state->reqs[0] = kmem_cache_alloc(req_cachep, gfp);
+			if (!state->reqs[0])
+				goto out;
+			ret = 1;
+		}
+		state->free_reqs = ret - 1;
+		state->cur_req = 1;
+		req = state->reqs[0];
+	} else {
+		req = state->reqs[state->cur_req];
+		state->free_reqs--;
+		state->cur_req++;
+	}
+
+	req->file = NULL;
+	req->ctx = ctx;
+	req->flags = 0;
+	/* one is dropped after submission, the other at completion */
+	refcount_set(&req->refs, 2);
+	req->result = 0;
+	return req;
+out:
+	io_ring_drop_ctx_refs(ctx, 1);
+	return NULL;
+}
+
+static void io_free_req_many(struct io_ring_ctx *ctx, void **reqs, int *nr)
+{
+	if (*nr) {
+		kmem_cache_free_bulk(req_cachep, *nr, reqs);
+		io_ring_drop_ctx_refs(ctx, *nr);
+		*nr = 0;
+	}
+}
+
+static void __io_free_req(struct io_kiocb *req)
+{
+	if (req->file && !(req->flags & REQ_F_FIXED_FILE))
+		fput(req->file);
+	io_ring_drop_ctx_refs(req->ctx, 1);
+	kmem_cache_free(req_cachep, req);
+}
+
+static void io_req_link_next(struct io_kiocb *req)
+{
+	struct io_kiocb *nxt;
+
+	/*
+	 * The list should never be empty when we are called here. But could
+	 * potentially happen if the chain is messed up, check to be on the
+	 * safe side.
+	 */
+	nxt = list_first_entry_or_null(&req->link_list, struct io_kiocb, list);
+	if (nxt) {
+		list_del(&nxt->list);
+		if (!list_empty(&req->link_list)) {
+			INIT_LIST_HEAD(&nxt->link_list);
+			list_splice(&req->link_list, &nxt->link_list);
+			nxt->flags |= REQ_F_LINK;
+		}
+
+		INIT_WORK(&nxt->work, io_sq_wq_submit_work);
+		queue_work(req->ctx->sqo_wq, &nxt->work);
+	}
+}
+
+/*
+ * Called if REQ_F_LINK is set, and we fail the head request
+ */
+static void io_fail_links(struct io_kiocb *req)
+{
+	struct io_kiocb *link;
+
+	while (!list_empty(&req->link_list)) {
+		link = list_first_entry(&req->link_list, struct io_kiocb, list);
+		list_del(&link->list);
+
+		io_cqring_add_event(req->ctx, link->user_data, -ECANCELED);
+		__io_free_req(link);
+	}
+}
+
+static void io_free_req(struct io_kiocb *req)
+{
+	/*
+	 * If LINK is set, we have dependent requests in this chain. If we
+	 * didn't fail this request, queue the first one up, moving any other
+	 * dependencies to the next request. In case of failure, fail the rest
+	 * of the chain.
+	 */
+	if (req->flags & REQ_F_LINK) {
+		if (req->flags & REQ_F_FAIL_LINK)
+			io_fail_links(req);
+		else
+			io_req_link_next(req);
+	}
+
+	__io_free_req(req);
+}
+
+static void io_put_req(struct io_kiocb *req)
+{
+	if (refcount_dec_and_test(&req->refs))
+		io_free_req(req);
+}
+
+/*
+ * Find and free completed poll iocbs
+ */
+static void io_iopoll_complete(struct io_ring_ctx *ctx, unsigned int *nr_events,
+			       struct list_head *done)
+{
+	void *reqs[IO_IOPOLL_BATCH];
+	struct io_kiocb *req;
+	int to_free;
+
+	to_free = 0;
+	while (!list_empty(done)) {
+		req = list_first_entry(done, struct io_kiocb, list);
+		list_del(&req->list);
+
+		io_cqring_fill_event(ctx, req->user_data, req->result);
+		(*nr_events)++;
+
+		if (refcount_dec_and_test(&req->refs)) {
+			/* If we're not using fixed files, we have to pair the
+			 * completion part with the file put. Use regular
+			 * completions for those, only batch free for fixed
+			 * file and non-linked commands.
+			 */
+			if ((req->flags & (REQ_F_FIXED_FILE|REQ_F_LINK)) ==
+			    REQ_F_FIXED_FILE) {
+				reqs[to_free++] = req;
+				if (to_free == ARRAY_SIZE(reqs))
+					io_free_req_many(ctx, reqs, &to_free);
+			} else {
+				io_free_req(req);
+			}
+		}
+	}
+
+	io_commit_cqring(ctx);
+	io_free_req_many(ctx, reqs, &to_free);
+}
+
+static int io_do_iopoll(struct io_ring_ctx *ctx, unsigned int *nr_events,
+			long min)
+{
+	struct io_kiocb *req, *tmp;
+	LIST_HEAD(done);
+	bool spin;
+	int ret;
+
+	/*
+	 * Only spin for completions if we don't have multiple devices hanging
+	 * off our complete list, and we're under the requested amount.
+	 */
+	spin = !ctx->poll_multi_file && *nr_events < min;
+
+	ret = 0;
+	list_for_each_entry_safe(req, tmp, &ctx->poll_list, list) {
+		struct kiocb *kiocb = &req->rw;
+
+		/*
+		 * Move completed entries to our local list. If we find a
+		 * request that requires polling, break out and complete
+		 * the done list first, if we have entries there.
+		 */
+		if (req->flags & REQ_F_IOPOLL_COMPLETED) {
+			list_move_tail(&req->list, &done);
+			continue;
+		}
+		if (!list_empty(&done))
+			break;
+
+		ret = kiocb->ki_filp->f_op->iopoll(kiocb, spin);
+		if (ret < 0)
+			break;
+
+		if (ret && spin)
+			spin = false;
+		ret = 0;
+	}
+
+	if (!list_empty(&done))
+		io_iopoll_complete(ctx, nr_events, &done);
+
+	return ret;
+}
+
+/*
+ * Poll for a mininum of 'min' events. Note that if min == 0 we consider that a
+ * non-spinning poll check - we'll still enter the driver poll loop, but only
+ * as a non-spinning completion check.
+ */
+static int io_iopoll_getevents(struct io_ring_ctx *ctx, unsigned int *nr_events,
+				long min)
+{
+	while (!list_empty(&ctx->poll_list)) {
+		int ret;
+
+		ret = io_do_iopoll(ctx, nr_events, min);
+		if (ret < 0)
+			return ret;
+		if (!min || *nr_events >= min)
+			return 0;
+	}
+
+	return 1;
+}
+
+/*
+ * We can't just wait for polled events to come to us, we have to actively
+ * find and complete them.
+ */
+static void io_iopoll_reap_events(struct io_ring_ctx *ctx)
+{
+	if (!(ctx->flags & IORING_SETUP_IOPOLL))
+		return;
+
+	mutex_lock(&ctx->uring_lock);
+	while (!list_empty(&ctx->poll_list)) {
+		unsigned int nr_events = 0;
+
+		io_iopoll_getevents(ctx, &nr_events, 1);
+	}
+	mutex_unlock(&ctx->uring_lock);
+}
+
+static int io_iopoll_check(struct io_ring_ctx *ctx, unsigned *nr_events,
+			   long min)
+{
+	int ret = 0;
+
+	do {
+		int tmin = 0;
+
+		if (*nr_events < min)
+			tmin = min - *nr_events;
+
+		ret = io_iopoll_getevents(ctx, nr_events, tmin);
+		if (ret <= 0)
+			break;
+		ret = 0;
+	} while (min && !*nr_events && !need_resched());
+
+	return ret;
+}
+
+static void kiocb_end_write(struct kiocb *kiocb)
+{
+	if (kiocb->ki_flags & IOCB_WRITE) {
+		struct inode *inode = file_inode(kiocb->ki_filp);
+
+		/*
+		 * Tell lockdep we inherited freeze protection from submission
+		 * thread.
+		 */
+		if (S_ISREG(inode->i_mode))
+			__sb_writers_acquired(inode->i_sb, SB_FREEZE_WRITE);
+		file_end_write(kiocb->ki_filp);
+	}
+}
+
+static void io_complete_rw(struct kiocb *kiocb, long res, long res2)
+{
+	struct io_kiocb *req = container_of(kiocb, struct io_kiocb, rw);
+
+	kiocb_end_write(kiocb);
+
+	if ((req->flags & REQ_F_LINK) && res != req->result)
+		req->flags |= REQ_F_FAIL_LINK;
+	io_cqring_add_event(req->ctx, req->user_data, res);
+	io_put_req(req);
+}
+
+static void io_complete_rw_iopoll(struct kiocb *kiocb, long res, long res2)
+{
+	struct io_kiocb *req = container_of(kiocb, struct io_kiocb, rw);
+
+	kiocb_end_write(kiocb);
+
+	if ((req->flags & REQ_F_LINK) && res != req->result)
+		req->flags |= REQ_F_FAIL_LINK;
+	req->result = res;
+	if (res != -EAGAIN)
+		req->flags |= REQ_F_IOPOLL_COMPLETED;
+}
+
+/*
+ * After the iocb has been issued, it's safe to be found on the poll list.
+ * Adding the kiocb to the list AFTER submission ensures that we don't
+ * find it from a io_iopoll_getevents() thread before the issuer is done
+ * accessing the kiocb cookie.
+ */
+static void io_iopoll_req_issued(struct io_kiocb *req)
+{
+	struct io_ring_ctx *ctx = req->ctx;
+
+	/*
+	 * Track whether we have multiple files in our lists. This will impact
+	 * how we do polling eventually, not spinning if we're on potentially
+	 * different devices.
+	 */
+	if (list_empty(&ctx->poll_list)) {
+		ctx->poll_multi_file = false;
+	} else if (!ctx->poll_multi_file) {
+		struct io_kiocb *list_req;
+
+		list_req = list_first_entry(&ctx->poll_list, struct io_kiocb,
+						list);
+		if (list_req->rw.ki_filp != req->rw.ki_filp)
+			ctx->poll_multi_file = true;
+	}
+
+	/*
+	 * For fast devices, IO may have already completed. If it has, add
+	 * it to the front so we find it first.
+	 */
+	if (req->flags & REQ_F_IOPOLL_COMPLETED)
+		list_add(&req->list, &ctx->poll_list);
+	else
+		list_add_tail(&req->list, &ctx->poll_list);
+}
+
+static void io_file_put(struct io_submit_state *state)
+{
+	if (state->file) {
+		int diff = state->has_refs - state->used_refs;
+
+		if (diff)
+			fput_many(state->file, diff);
+		state->file = NULL;
+	}
+}
+
+/*
+ * Get as many references to a file as we have IOs left in this submission,
+ * assuming most submissions are for one file, or at least that each file
+ * has more than one submission.
+ */
+static struct file *io_file_get(struct io_submit_state *state, int fd)
+{
+	if (!state)
+		return fget(fd);
+
+	if (state->file) {
+		if (state->fd == fd) {
+			state->used_refs++;
+			state->ios_left--;
+			return state->file;
+		}
+		io_file_put(state);
+	}
+	state->file = fget_many(fd, state->ios_left);
+	if (!state->file)
+		return NULL;
+
+	state->fd = fd;
+	state->has_refs = state->ios_left;
+	state->used_refs = 1;
+	state->ios_left--;
+	return state->file;
+}
+
+/*
+ * If we tracked the file through the SCM inflight mechanism, we could support
+ * any file. For now, just ensure that anything potentially problematic is done
+ * inline.
+ */
+static bool io_file_supports_async(struct file *file)
+{
+	umode_t mode = file_inode(file)->i_mode;
+
+	if (S_ISBLK(mode) || S_ISCHR(mode))
+		return true;
+	if (S_ISREG(mode) && file->f_op != &io_uring_fops)
+		return true;
+
+	return false;
+}
+
+static int io_prep_rw(struct io_kiocb *req, const struct sqe_submit *s,
+		      bool force_nonblock)
+{
+	const struct io_uring_sqe *sqe = s->sqe;
+	struct io_ring_ctx *ctx = req->ctx;
+	struct kiocb *kiocb = &req->rw;
+	unsigned ioprio;
+	int ret;
+
+	if (!req->file)
+		return -EBADF;
+
+	if (force_nonblock && !io_file_supports_async(req->file))
+		force_nonblock = false;
+
+	kiocb->ki_pos = READ_ONCE(sqe->off);
+	kiocb->ki_flags = iocb_flags(kiocb->ki_filp);
+	kiocb->ki_hint = ki_hint_validate(file_write_hint(kiocb->ki_filp));
+
+	ioprio = READ_ONCE(sqe->ioprio);
+	if (ioprio) {
+		ret = ioprio_check_cap(ioprio);
+		if (ret)
+			return ret;
+
+		kiocb->ki_ioprio = ioprio;
+	} else
+		kiocb->ki_ioprio = get_current_ioprio();
+
+	ret = kiocb_set_rw_flags(kiocb, READ_ONCE(sqe->rw_flags));
+	if (unlikely(ret))
+		return ret;
+
+	/* don't allow async punt if RWF_NOWAIT was requested */
+	if (kiocb->ki_flags & IOCB_NOWAIT)
+		req->flags |= REQ_F_NOWAIT;
+
+	if (force_nonblock)
+		kiocb->ki_flags |= IOCB_NOWAIT;
+
+	if (ctx->flags & IORING_SETUP_IOPOLL) {
+		if (!(kiocb->ki_flags & IOCB_DIRECT) ||
+		    !kiocb->ki_filp->f_op->iopoll)
+			return -EOPNOTSUPP;
+
+		kiocb->ki_flags |= IOCB_HIPRI;
+		kiocb->ki_complete = io_complete_rw_iopoll;
+	} else {
+		if (kiocb->ki_flags & IOCB_HIPRI)
+			return -EINVAL;
+		kiocb->ki_complete = io_complete_rw;
+	}
+	return 0;
+}
+
+static inline void io_rw_done(struct kiocb *kiocb, ssize_t ret)
+{
+	switch (ret) {
+	case -EIOCBQUEUED:
+		break;
+	case -ERESTARTSYS:
+	case -ERESTARTNOINTR:
+	case -ERESTARTNOHAND:
+	case -ERESTART_RESTARTBLOCK:
+		/*
+		 * We can't just restart the syscall, since previously
+		 * submitted sqes may already be in progress. Just fail this
+		 * IO with EINTR.
+		 */
+		ret = -EINTR;
+		/* fall through */
+	default:
+		kiocb->ki_complete(kiocb, ret, 0);
+	}
+}
+
+static int io_import_fixed(struct io_ring_ctx *ctx, int rw,
+			   const struct io_uring_sqe *sqe,
+			   struct iov_iter *iter)
+{
+	size_t len = READ_ONCE(sqe->len);
+	struct io_mapped_ubuf *imu;
+	unsigned index, buf_index;
+	size_t offset;
+	u64 buf_addr;
+
+	/* attempt to use fixed buffers without having provided iovecs */
+	if (unlikely(!ctx->user_bufs))
+		return -EFAULT;
+
+	buf_index = READ_ONCE(sqe->buf_index);
+	if (unlikely(buf_index >= ctx->nr_user_bufs))
+		return -EFAULT;
+
+	index = array_index_nospec(buf_index, ctx->nr_user_bufs);
+	imu = &ctx->user_bufs[index];
+	buf_addr = READ_ONCE(sqe->addr);
+
+	/* overflow */
+	if (buf_addr + len < buf_addr)
+		return -EFAULT;
+	/* not inside the mapped region */
+	if (buf_addr < imu->ubuf || buf_addr + len > imu->ubuf + imu->len)
+		return -EFAULT;
+
+	/*
+	 * May not be a start of buffer, set size appropriately
+	 * and advance us to the beginning.
+	 */
+	offset = buf_addr - imu->ubuf;
+	iov_iter_bvec(iter, rw, imu->bvec, imu->nr_bvecs, offset + len);
+	if (offset)
+		iov_iter_advance(iter, offset);
+	return 0;
+}
+
+static ssize_t io_import_iovec(struct io_ring_ctx *ctx, int rw,
+			       const struct sqe_submit *s, struct iovec **iovec,
+			       struct iov_iter *iter)
+{
+	const struct io_uring_sqe *sqe = s->sqe;
+	void __user *buf = u64_to_user_ptr(READ_ONCE(sqe->addr));
+	size_t sqe_len = READ_ONCE(sqe->len);
+	u8 opcode;
+
+	/*
+	 * We're reading ->opcode for the second time, but the first read
+	 * doesn't care whether it's _FIXED or not, so it doesn't matter
+	 * whether ->opcode changes concurrently. The first read does care
+	 * about whether it is a READ or a WRITE, so we don't trust this read
+	 * for that purpose and instead let the caller pass in the read/write
+	 * flag.
+	 */
+	opcode = READ_ONCE(sqe->opcode);
+	if (opcode == IORING_OP_READ_FIXED ||
+	    opcode == IORING_OP_WRITE_FIXED) {
+		ssize_t ret = io_import_fixed(ctx, rw, sqe, iter);
+		*iovec = NULL;
+		return ret;
+	}
+
+	if (!s->has_user)
+		return -EFAULT;
+
+#ifdef CONFIG_COMPAT
+	if (ctx->compat)
+		return compat_import_iovec(rw, buf, sqe_len, UIO_FASTIOV,
+						iovec, iter);
+#endif
+
+	return import_iovec(rw, buf, sqe_len, UIO_FASTIOV, iovec, iter);
+}
+
+/*
+ * Make a note of the last file/offset/direction we punted to async
+ * context. We'll use this information to see if we can piggy back a
+ * sequential request onto the previous one, if it's still hasn't been
+ * completed by the async worker.
+ */
+static void io_async_list_note(int rw, struct io_kiocb *req, size_t len)
+{
+	struct async_list *async_list = &req->ctx->pending_async[rw];
+	struct kiocb *kiocb = &req->rw;
+	struct file *filp = kiocb->ki_filp;
+	off_t io_end = kiocb->ki_pos + len;
+
+	if (filp == async_list->file && kiocb->ki_pos == async_list->io_end) {
+		unsigned long max_pages;
+
+		/* Use 8x RA size as a decent limiter for both reads/writes */
+		max_pages = filp->f_ra.ra_pages;
+		if (!max_pages)
+			max_pages = VM_READAHEAD_PAGES;
+		max_pages *= 8;
+
+		/* If max pages are exceeded, reset the state */
+		len >>= PAGE_SHIFT;
+		if (async_list->io_pages + len <= max_pages) {
+			req->flags |= REQ_F_SEQ_PREV;
+			async_list->io_pages += len;
+		} else {
+			io_end = 0;
+			async_list->io_pages = 0;
+		}
+	}
+
+	/* New file? Reset state. */
+	if (async_list->file != filp) {
+		async_list->io_pages = 0;
+		async_list->file = filp;
+	}
+	async_list->io_end = io_end;
+}
+
+static int io_read(struct io_kiocb *req, const struct sqe_submit *s,
+		   bool force_nonblock)
+{
+	struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
+	struct kiocb *kiocb = &req->rw;
+	struct iov_iter iter;
+	struct file *file;
+	size_t iov_count;
+	ssize_t read_size, ret;
+
+	ret = io_prep_rw(req, s, force_nonblock);
+	if (ret)
+		return ret;
+	file = kiocb->ki_filp;
+
+	if (unlikely(!(file->f_mode & FMODE_READ)))
+		return -EBADF;
+	if (unlikely(!file->f_op->read_iter))
+		return -EINVAL;
+
+	ret = io_import_iovec(req->ctx, READ, s, &iovec, &iter);
+	if (ret < 0)
+		return ret;
+
+	read_size = ret;
+	if (req->flags & REQ_F_LINK)
+		req->result = read_size;
+
+	iov_count = iov_iter_count(&iter);
+	ret = rw_verify_area(READ, file, &kiocb->ki_pos, iov_count);
+	if (!ret) {
+		ssize_t ret2;
+
+		ret2 = call_read_iter(file, kiocb, &iter);
+		/*
+		 * In case of a short read, punt to async. This can happen
+		 * if we have data partially cached. Alternatively we can
+		 * return the short read, in which case the application will
+		 * need to issue another SQE and wait for it. That SQE will
+		 * need async punt anyway, so it's more efficient to do it
+		 * here.
+		 */
+		if (force_nonblock && ret2 > 0 && ret2 < read_size)
+			ret2 = -EAGAIN;
+		/* Catch -EAGAIN return for forced non-blocking submission */
+		if (!force_nonblock || ret2 != -EAGAIN) {
+			io_rw_done(kiocb, ret2);
+		} else {
+			/*
+			 * If ->needs_lock is true, we're already in async
+			 * context.
+			 */
+			if (!s->needs_lock)
+				io_async_list_note(READ, req, iov_count);
+			ret = -EAGAIN;
+		}
+	}
+	kfree(iovec);
+	return ret;
+}
+
+static int io_write(struct io_kiocb *req, const struct sqe_submit *s,
+		    bool force_nonblock)
+{
+	struct iovec inline_vecs[UIO_FASTIOV], *iovec = inline_vecs;
+	struct kiocb *kiocb = &req->rw;
+	struct iov_iter iter;
+	struct file *file;
+	size_t iov_count;
+	ssize_t ret;
+
+	ret = io_prep_rw(req, s, force_nonblock);
+	if (ret)
+		return ret;
+
+	file = kiocb->ki_filp;
+	if (unlikely(!(file->f_mode & FMODE_WRITE)))
+		return -EBADF;
+	if (unlikely(!file->f_op->write_iter))
+		return -EINVAL;
+
+	ret = io_import_iovec(req->ctx, WRITE, s, &iovec, &iter);
+	if (ret < 0)
+		return ret;
+
+	if (req->flags & REQ_F_LINK)
+		req->result = ret;
+
+	iov_count = iov_iter_count(&iter);
+
+	ret = -EAGAIN;
+	if (force_nonblock && !(kiocb->ki_flags & IOCB_DIRECT)) {
+		/* If ->needs_lock is true, we're already in async context. */
+		if (!s->needs_lock)
+			io_async_list_note(WRITE, req, iov_count);
+		goto out_free;
+	}
+
+	ret = rw_verify_area(WRITE, file, &kiocb->ki_pos, iov_count);
+	if (!ret) {
+		ssize_t ret2;
+
+		/*
+		 * Open-code file_start_write here to grab freeze protection,
+		 * which will be released by another thread in
+		 * io_complete_rw().  Fool lockdep by telling it the lock got
+		 * released so that it doesn't complain about the held lock when
+		 * we return to userspace.
+		 */
+		if (S_ISREG(file_inode(file)->i_mode)) {
+			__sb_start_write(file_inode(file)->i_sb,
+						SB_FREEZE_WRITE, true);
+			__sb_writers_release(file_inode(file)->i_sb,
+						SB_FREEZE_WRITE);
+		}
+		kiocb->ki_flags |= IOCB_WRITE;
+
+		ret2 = call_write_iter(file, kiocb, &iter);
+		if (!force_nonblock || ret2 != -EAGAIN) {
+			io_rw_done(kiocb, ret2);
+		} else {
+			/*
+			 * If ->needs_lock is true, we're already in async
+			 * context.
+			 */
+			if (!s->needs_lock)
+				io_async_list_note(WRITE, req, iov_count);
+			ret = -EAGAIN;
+		}
+	}
+out_free:
+	kfree(iovec);
+	return ret;
+}
+
+/*
+ * IORING_OP_NOP just posts a completion event, nothing else.
+ */
+static int io_nop(struct io_kiocb *req, u64 user_data)
+{
+	struct io_ring_ctx *ctx = req->ctx;
+	long err = 0;
+
+	if (unlikely(ctx->flags & IORING_SETUP_IOPOLL))
+		return -EINVAL;
+
+	io_cqring_add_event(ctx, user_data, err);
+	io_put_req(req);
+	return 0;
+}
+
+static int io_prep_fsync(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+	struct io_ring_ctx *ctx = req->ctx;
+
+	if (!req->file)
+		return -EBADF;
+
+	if (unlikely(ctx->flags & IORING_SETUP_IOPOLL))
+		return -EINVAL;
+	if (unlikely(sqe->addr || sqe->ioprio || sqe->buf_index))
+		return -EINVAL;
+
+	return 0;
+}
+
+static int io_fsync(struct io_kiocb *req, const struct io_uring_sqe *sqe,
+		    bool force_nonblock)
+{
+	loff_t sqe_off = READ_ONCE(sqe->off);
+	loff_t sqe_len = READ_ONCE(sqe->len);
+	loff_t end = sqe_off + sqe_len;
+	unsigned fsync_flags;
+	int ret;
+
+	fsync_flags = READ_ONCE(sqe->fsync_flags);
+	if (unlikely(fsync_flags & ~IORING_FSYNC_DATASYNC))
+		return -EINVAL;
+
+	ret = io_prep_fsync(req, sqe);
+	if (ret)
+		return ret;
+
+	/* fsync always requires a blocking context */
+	if (force_nonblock)
+		return -EAGAIN;
+
+	ret = vfs_fsync_range(req->rw.ki_filp, sqe_off,
+				end > 0 ? end : LLONG_MAX,
+				fsync_flags & IORING_FSYNC_DATASYNC);
+
+	if (ret < 0 && (req->flags & REQ_F_LINK))
+		req->flags |= REQ_F_FAIL_LINK;
+	io_cqring_add_event(req->ctx, sqe->user_data, ret);
+	io_put_req(req);
+	return 0;
+}
+
+static int io_prep_sfr(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+	struct io_ring_ctx *ctx = req->ctx;
+	int ret = 0;
+
+	if (!req->file)
+		return -EBADF;
+
+	if (unlikely(ctx->flags & IORING_SETUP_IOPOLL))
+		return -EINVAL;
+	if (unlikely(sqe->addr || sqe->ioprio || sqe->buf_index))
+		return -EINVAL;
+
+	return ret;
+}
+
+static int io_sync_file_range(struct io_kiocb *req,
+			      const struct io_uring_sqe *sqe,
+			      bool force_nonblock)
+{
+	loff_t sqe_off;
+	loff_t sqe_len;
+	unsigned flags;
+	int ret;
+
+	ret = io_prep_sfr(req, sqe);
+	if (ret)
+		return ret;
+
+	/* sync_file_range always requires a blocking context */
+	if (force_nonblock)
+		return -EAGAIN;
+
+	sqe_off = READ_ONCE(sqe->off);
+	sqe_len = READ_ONCE(sqe->len);
+	flags = READ_ONCE(sqe->sync_range_flags);
+
+	ret = sync_file_range(req->rw.ki_filp, sqe_off, sqe_len, flags);
+
+	if (ret < 0 && (req->flags & REQ_F_LINK))
+		req->flags |= REQ_F_FAIL_LINK;
+	io_cqring_add_event(req->ctx, sqe->user_data, ret);
+	io_put_req(req);
+	return 0;
+}
+
+#if defined(CONFIG_NET)
+static int io_send_recvmsg(struct io_kiocb *req, const struct io_uring_sqe *sqe,
+			   bool force_nonblock,
+		   long (*fn)(struct socket *, struct user_msghdr __user *,
+				unsigned int))
+{
+	struct socket *sock;
+	int ret;
+
+	if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+		return -EINVAL;
+
+	sock = sock_from_file(req->file, &ret);
+	if (sock) {
+		struct user_msghdr __user *msg;
+		unsigned flags;
+
+		flags = READ_ONCE(sqe->msg_flags);
+		if (flags & MSG_DONTWAIT)
+			req->flags |= REQ_F_NOWAIT;
+		else if (force_nonblock)
+			flags |= MSG_DONTWAIT;
+
+		msg = (struct user_msghdr __user *) (unsigned long)
+			READ_ONCE(sqe->addr);
+
+		ret = fn(sock, msg, flags);
+		if (force_nonblock && ret == -EAGAIN)
+			return ret;
+	}
+
+	io_cqring_add_event(req->ctx, sqe->user_data, ret);
+	io_put_req(req);
+	return 0;
+}
+#endif
+
+static int io_sendmsg(struct io_kiocb *req, const struct io_uring_sqe *sqe,
+		      bool force_nonblock)
+{
+#if defined(CONFIG_NET)
+	return io_send_recvmsg(req, sqe, force_nonblock, __sys_sendmsg_sock);
+#else
+	return -EOPNOTSUPP;
+#endif
+}
+
+static int io_recvmsg(struct io_kiocb *req, const struct io_uring_sqe *sqe,
+		      bool force_nonblock)
+{
+#if defined(CONFIG_NET)
+	return io_send_recvmsg(req, sqe, force_nonblock, __sys_recvmsg_sock);
+#else
+	return -EOPNOTSUPP;
+#endif
+}
+
+static void io_poll_remove_one(struct io_kiocb *req)
+{
+	struct io_poll_iocb *poll = &req->poll;
+
+	spin_lock(&poll->head->lock);
+	WRITE_ONCE(poll->canceled, true);
+	if (!list_empty(&poll->wait.entry)) {
+		list_del_init(&poll->wait.entry);
+		queue_work(req->ctx->sqo_wq, &req->work);
+	}
+	spin_unlock(&poll->head->lock);
+
+	list_del_init(&req->list);
+}
+
+static void io_poll_remove_all(struct io_ring_ctx *ctx)
+{
+	struct io_kiocb *req;
+
+	spin_lock_irq(&ctx->completion_lock);
+	while (!list_empty(&ctx->cancel_list)) {
+		req = list_first_entry(&ctx->cancel_list, struct io_kiocb,list);
+		io_poll_remove_one(req);
+	}
+	spin_unlock_irq(&ctx->completion_lock);
+}
+
+/*
+ * Find a running poll command that matches one specified in sqe->addr,
+ * and remove it if found.
+ */
+static int io_poll_remove(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+	struct io_ring_ctx *ctx = req->ctx;
+	struct io_kiocb *poll_req, *next;
+	int ret = -ENOENT;
+
+	if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+		return -EINVAL;
+	if (sqe->ioprio || sqe->off || sqe->len || sqe->buf_index ||
+	    sqe->poll_events)
+		return -EINVAL;
+
+	spin_lock_irq(&ctx->completion_lock);
+	list_for_each_entry_safe(poll_req, next, &ctx->cancel_list, list) {
+		if (READ_ONCE(sqe->addr) == poll_req->user_data) {
+			io_poll_remove_one(poll_req);
+			ret = 0;
+			break;
+		}
+	}
+	spin_unlock_irq(&ctx->completion_lock);
+
+	io_cqring_add_event(req->ctx, sqe->user_data, ret);
+	io_put_req(req);
+	return 0;
+}
+
+static void io_poll_complete(struct io_ring_ctx *ctx, struct io_kiocb *req,
+			     __poll_t mask)
+{
+	req->poll.done = true;
+	io_cqring_fill_event(ctx, req->user_data, mangle_poll(mask));
+	io_commit_cqring(ctx);
+}
+
+static void io_poll_complete_work(struct work_struct *work)
+{
+	struct io_kiocb *req = container_of(work, struct io_kiocb, work);
+	struct io_poll_iocb *poll = &req->poll;
+	struct poll_table_struct pt = { ._key = poll->events };
+	struct io_ring_ctx *ctx = req->ctx;
+	__poll_t mask = 0;
+
+	if (!READ_ONCE(poll->canceled))
+		mask = vfs_poll(poll->file, &pt) & poll->events;
+
+	/*
+	 * Note that ->ki_cancel callers also delete iocb from active_reqs after
+	 * calling ->ki_cancel.  We need the ctx_lock roundtrip here to
+	 * synchronize with them.  In the cancellation case the list_del_init
+	 * itself is not actually needed, but harmless so we keep it in to
+	 * avoid further branches in the fast path.
+	 */
+	spin_lock_irq(&ctx->completion_lock);
+	if (!mask && !READ_ONCE(poll->canceled)) {
+		add_wait_queue(poll->head, &poll->wait);
+		spin_unlock_irq(&ctx->completion_lock);
+		return;
+	}
+	list_del_init(&req->list);
+	io_poll_complete(ctx, req, mask);
+	spin_unlock_irq(&ctx->completion_lock);
+
+	io_cqring_ev_posted(ctx);
+	io_put_req(req);
+}
+
+static int io_poll_wake(struct wait_queue_entry *wait, unsigned mode, int sync,
+			void *key)
+{
+	struct io_poll_iocb *poll = container_of(wait, struct io_poll_iocb,
+							wait);
+	struct io_kiocb *req = container_of(poll, struct io_kiocb, poll);
+	struct io_ring_ctx *ctx = req->ctx;
+	__poll_t mask = key_to_poll(key);
+	unsigned long flags;
+
+	/* for instances that support it check for an event match first: */
+	if (mask && !(mask & poll->events))
+		return 0;
+
+	list_del_init(&poll->wait.entry);
+
+	if (mask && spin_trylock_irqsave(&ctx->completion_lock, flags)) {
+		list_del(&req->list);
+		io_poll_complete(ctx, req, mask);
+		spin_unlock_irqrestore(&ctx->completion_lock, flags);
+
+		io_cqring_ev_posted(ctx);
+		io_put_req(req);
+	} else {
+		queue_work(ctx->sqo_wq, &req->work);
+	}
+
+	return 1;
+}
+
+struct io_poll_table {
+	struct poll_table_struct pt;
+	struct io_kiocb *req;
+	int error;
+};
+
+static void io_poll_queue_proc(struct file *file, struct wait_queue_head *head,
+			       struct poll_table_struct *p)
+{
+	struct io_poll_table *pt = container_of(p, struct io_poll_table, pt);
+
+	if (unlikely(pt->req->poll.head)) {
+		pt->error = -EINVAL;
+		return;
+	}
+
+	pt->error = 0;
+	pt->req->poll.head = head;
+	add_wait_queue(head, &pt->req->poll.wait);
+}
+
+static int io_poll_add(struct io_kiocb *req, const struct io_uring_sqe *sqe)
+{
+	struct io_poll_iocb *poll = &req->poll;
+	struct io_ring_ctx *ctx = req->ctx;
+	struct io_poll_table ipt;
+	bool cancel = false;
+	__poll_t mask;
+	u16 events;
+
+	if (unlikely(req->ctx->flags & IORING_SETUP_IOPOLL))
+		return -EINVAL;
+	if (sqe->addr || sqe->ioprio || sqe->off || sqe->len || sqe->buf_index)
+		return -EINVAL;
+	if (!poll->file)
+		return -EBADF;
+
+	INIT_WORK(&req->work, io_poll_complete_work);
+	events = READ_ONCE(sqe->poll_events);
+	poll->events = demangle_poll(events) | EPOLLERR | EPOLLHUP;
+
+	poll->head = NULL;
+	poll->done = false;
+	poll->canceled = false;
+
+	ipt.pt._qproc = io_poll_queue_proc;
+	ipt.pt._key = poll->events;
+	ipt.req = req;
+	ipt.error = -EINVAL; /* same as no support for IOCB_CMD_POLL */
+
+	/* initialized the list so that we can do list_empty checks */
+	INIT_LIST_HEAD(&poll->wait.entry);
+	init_waitqueue_func_entry(&poll->wait, io_poll_wake);
+
+	mask = vfs_poll(poll->file, &ipt.pt) & poll->events;
+
+	spin_lock_irq(&ctx->completion_lock);
+	if (likely(poll->head)) {
+		spin_lock(&poll->head->lock);
+		if (unlikely(list_empty(&poll->wait.entry))) {
+			if (ipt.error)
+				cancel = true;
+			ipt.error = 0;
+			mask = 0;
+		}
+		if (mask || ipt.error)
+			list_del_init(&poll->wait.entry);
+		else if (cancel)
+			WRITE_ONCE(poll->canceled, true);
+		else if (!poll->done) /* actually waiting for an event */
+			list_add_tail(&req->list, &ctx->cancel_list);
+		spin_unlock(&poll->head->lock);
+	}
+	if (mask) { /* no async, we'd stolen it */
+		ipt.error = 0;
+		io_poll_complete(ctx, req, mask);
+	}
+	spin_unlock_irq(&ctx->completion_lock);
+
+	if (mask) {
+		io_cqring_ev_posted(ctx);
+		io_put_req(req);
+	}
+	return ipt.error;
+}
+
+static int io_req_defer(struct io_ring_ctx *ctx, struct io_kiocb *req,
+			const struct io_uring_sqe *sqe)
+{
+	struct io_uring_sqe *sqe_copy;
+
+	if (!io_sequence_defer(ctx, req) && list_empty(&ctx->defer_list))
+		return 0;
+
+	sqe_copy = kmalloc(sizeof(*sqe_copy), GFP_KERNEL);
+	if (!sqe_copy)
+		return -EAGAIN;
+
+	spin_lock_irq(&ctx->completion_lock);
+	if (!io_sequence_defer(ctx, req) && list_empty(&ctx->defer_list)) {
+		spin_unlock_irq(&ctx->completion_lock);
+		kfree(sqe_copy);
+		return 0;
+	}
+
+	memcpy(sqe_copy, sqe, sizeof(*sqe_copy));
+	req->submit.sqe = sqe_copy;
+
+	INIT_WORK(&req->work, io_sq_wq_submit_work);
+	list_add_tail(&req->list, &ctx->defer_list);
+	spin_unlock_irq(&ctx->completion_lock);
+	return -EIOCBQUEUED;
+}
+
+static int __io_submit_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
+			   const struct sqe_submit *s, bool force_nonblock)
+{
+	int ret, opcode;
+
+	req->user_data = READ_ONCE(s->sqe->user_data);
+
+	if (unlikely(s->index >= ctx->sq_entries))
+		return -EINVAL;
+
+	opcode = READ_ONCE(s->sqe->opcode);
+	switch (opcode) {
+	case IORING_OP_NOP:
+		ret = io_nop(req, req->user_data);
+		break;
+	case IORING_OP_READV:
+		if (unlikely(s->sqe->buf_index))
+			return -EINVAL;
+		ret = io_read(req, s, force_nonblock);
+		break;
+	case IORING_OP_WRITEV:
+		if (unlikely(s->sqe->buf_index))
+			return -EINVAL;
+		ret = io_write(req, s, force_nonblock);
+		break;
+	case IORING_OP_READ_FIXED:
+		ret = io_read(req, s, force_nonblock);
+		break;
+	case IORING_OP_WRITE_FIXED:
+		ret = io_write(req, s, force_nonblock);
+		break;
+	case IORING_OP_FSYNC:
+		ret = io_fsync(req, s->sqe, force_nonblock);
+		break;
+	case IORING_OP_POLL_ADD:
+		ret = io_poll_add(req, s->sqe);
+		break;
+	case IORING_OP_POLL_REMOVE:
+		ret = io_poll_remove(req, s->sqe);
+		break;
+	case IORING_OP_SYNC_FILE_RANGE:
+		ret = io_sync_file_range(req, s->sqe, force_nonblock);
+		break;
+	case IORING_OP_SENDMSG:
+		ret = io_sendmsg(req, s->sqe, force_nonblock);
+		break;
+	case IORING_OP_RECVMSG:
+		ret = io_recvmsg(req, s->sqe, force_nonblock);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	if (ret)
+		return ret;
+
+	if (ctx->flags & IORING_SETUP_IOPOLL) {
+		if (req->result == -EAGAIN)
+			return -EAGAIN;
+
+		/* workqueue context doesn't hold uring_lock, grab it now */
+		if (s->needs_lock)
+			mutex_lock(&ctx->uring_lock);
+		io_iopoll_req_issued(req);
+		if (s->needs_lock)
+			mutex_unlock(&ctx->uring_lock);
+	}
+
+	return 0;
+}
+
+static struct async_list *io_async_list_from_sqe(struct io_ring_ctx *ctx,
+						 const struct io_uring_sqe *sqe)
+{
+	switch (sqe->opcode) {
+	case IORING_OP_READV:
+	case IORING_OP_READ_FIXED:
+		return &ctx->pending_async[READ];
+	case IORING_OP_WRITEV:
+	case IORING_OP_WRITE_FIXED:
+		return &ctx->pending_async[WRITE];
+	default:
+		return NULL;
+	}
+}
+
+static inline bool io_sqe_needs_user(const struct io_uring_sqe *sqe)
+{
+	u8 opcode = READ_ONCE(sqe->opcode);
+
+	return !(opcode == IORING_OP_READ_FIXED ||
+		 opcode == IORING_OP_WRITE_FIXED);
+}
+
+static void io_sq_wq_submit_work(struct work_struct *work)
+{
+	struct io_kiocb *req = container_of(work, struct io_kiocb, work);
+	struct io_ring_ctx *ctx = req->ctx;
+	struct mm_struct *cur_mm = NULL;
+	struct async_list *async_list;
+	LIST_HEAD(req_list);
+	mm_segment_t old_fs;
+	int ret;
+
+	async_list = io_async_list_from_sqe(ctx, req->submit.sqe);
+restart:
+	do {
+		struct sqe_submit *s = &req->submit;
+		const struct io_uring_sqe *sqe = s->sqe;
+
+		/* Ensure we clear previously set non-block flag */
+		req->rw.ki_flags &= ~IOCB_NOWAIT;
+
+		ret = 0;
+		if (io_sqe_needs_user(sqe) && !cur_mm) {
+			if (!mmget_not_zero(ctx->sqo_mm)) {
+				ret = -EFAULT;
+			} else {
+				cur_mm = ctx->sqo_mm;
+				use_mm(cur_mm);
+				old_fs = get_fs();
+				set_fs(USER_DS);
+			}
+		}
+
+		if (!ret) {
+			s->has_user = cur_mm != NULL;
+			s->needs_lock = true;
+			do {
+				ret = __io_submit_sqe(ctx, req, s, false);
+				/*
+				 * We can get EAGAIN for polled IO even though
+				 * we're forcing a sync submission from here,
+				 * since we can't wait for request slots on the
+				 * block side.
+				 */
+				if (ret != -EAGAIN)
+					break;
+				cond_resched();
+			} while (1);
+		}
+
+		/* drop submission reference */
+		io_put_req(req);
+
+		if (ret) {
+			io_cqring_add_event(ctx, sqe->user_data, ret);
+			io_put_req(req);
+		}
+
+		/* async context always use a copy of the sqe */
+		kfree(sqe);
+
+		if (!async_list)
+			break;
+		if (!list_empty(&req_list)) {
+			req = list_first_entry(&req_list, struct io_kiocb,
+						list);
+			list_del(&req->list);
+			continue;
+		}
+		if (list_empty(&async_list->list))
+			break;
+
+		req = NULL;
+		spin_lock(&async_list->lock);
+		if (list_empty(&async_list->list)) {
+			spin_unlock(&async_list->lock);
+			break;
+		}
+		list_splice_init(&async_list->list, &req_list);
+		spin_unlock(&async_list->lock);
+
+		req = list_first_entry(&req_list, struct io_kiocb, list);
+		list_del(&req->list);
+	} while (req);
+
+	/*
+	 * Rare case of racing with a submitter. If we find the count has
+	 * dropped to zero AND we have pending work items, then restart
+	 * the processing. This is a tiny race window.
+	 */
+	if (async_list) {
+		ret = atomic_dec_return(&async_list->cnt);
+		while (!ret && !list_empty(&async_list->list)) {
+			spin_lock(&async_list->lock);
+			atomic_inc(&async_list->cnt);
+			list_splice_init(&async_list->list, &req_list);
+			spin_unlock(&async_list->lock);
+
+			if (!list_empty(&req_list)) {
+				req = list_first_entry(&req_list,
+							struct io_kiocb, list);
+				list_del(&req->list);
+				goto restart;
+			}
+			ret = atomic_dec_return(&async_list->cnt);
+		}
+	}
+
+	if (cur_mm) {
+		set_fs(old_fs);
+		unuse_mm(cur_mm);
+		mmput(cur_mm);
+	}
+}
+
+/*
+ * See if we can piggy back onto previously submitted work, that is still
+ * running. We currently only allow this if the new request is sequential
+ * to the previous one we punted.
+ */
+static bool io_add_to_prev_work(struct async_list *list, struct io_kiocb *req)
+{
+	bool ret = false;
+
+	if (!list)
+		return false;
+	if (!(req->flags & REQ_F_SEQ_PREV))
+		return false;
+	if (!atomic_read(&list->cnt))
+		return false;
+
+	ret = true;
+	spin_lock(&list->lock);
+	list_add_tail(&req->list, &list->list);
+	if (!atomic_read(&list->cnt)) {
+		list_del_init(&req->list);
+		ret = false;
+	}
+	spin_unlock(&list->lock);
+	return ret;
+}
+
+static bool io_op_needs_file(const struct io_uring_sqe *sqe)
+{
+	int op = READ_ONCE(sqe->opcode);
+
+	switch (op) {
+	case IORING_OP_NOP:
+	case IORING_OP_POLL_REMOVE:
+		return false;
+	default:
+		return true;
+	}
+}
+
+static int io_req_set_file(struct io_ring_ctx *ctx, const struct sqe_submit *s,
+			   struct io_submit_state *state, struct io_kiocb *req)
+{
+	unsigned flags;
+	int fd;
+
+	flags = READ_ONCE(s->sqe->flags);
+	fd = READ_ONCE(s->sqe->fd);
+
+	if (flags & IOSQE_IO_DRAIN) {
+		req->flags |= REQ_F_IO_DRAIN;
+		req->sequence = ctx->cached_sq_head - 1;
+	}
+
+	if (!io_op_needs_file(s->sqe))
+		return 0;
+
+	if (flags & IOSQE_FIXED_FILE) {
+		if (unlikely(!ctx->user_files ||
+		    (unsigned) fd >= ctx->nr_user_files))
+			return -EBADF;
+		req->file = ctx->user_files[fd];
+		req->flags |= REQ_F_FIXED_FILE;
+	} else {
+		if (s->needs_fixed_file)
+			return -EBADF;
+		req->file = io_file_get(state, fd);
+		if (unlikely(!req->file))
+			return -EBADF;
+	}
+
+	return 0;
+}
+
+static int io_queue_sqe(struct io_ring_ctx *ctx, struct io_kiocb *req,
+			struct sqe_submit *s)
+{
+	int ret;
+
+	ret = __io_submit_sqe(ctx, req, s, true);
+	if (ret == -EAGAIN && !(req->flags & REQ_F_NOWAIT)) {
+		struct io_uring_sqe *sqe_copy;
+
+		sqe_copy = kmalloc(sizeof(*sqe_copy), GFP_KERNEL);
+		if (sqe_copy) {
+			struct async_list *list;
+
+			memcpy(sqe_copy, s->sqe, sizeof(*sqe_copy));
+			s->sqe = sqe_copy;
+
+			memcpy(&req->submit, s, sizeof(*s));
+			list = io_async_list_from_sqe(ctx, s->sqe);
+			if (!io_add_to_prev_work(list, req)) {
+				if (list)
+					atomic_inc(&list->cnt);
+				INIT_WORK(&req->work, io_sq_wq_submit_work);
+				queue_work(ctx->sqo_wq, &req->work);
+			}
+
+			/*
+			 * Queued up for async execution, worker will release
+			 * submit reference when the iocb is actually submitted.
+			 */
+			return 0;
+		}
+	}
+
+	/* drop submission reference */
+	io_put_req(req);
+
+	/* and drop final reference, if we failed */
+	if (ret) {
+		io_cqring_add_event(ctx, req->user_data, ret);
+		if (req->flags & REQ_F_LINK)
+			req->flags |= REQ_F_FAIL_LINK;
+		io_put_req(req);
+	}
+
+	return ret;
+}
+
+#define SQE_VALID_FLAGS	(IOSQE_FIXED_FILE|IOSQE_IO_DRAIN|IOSQE_IO_LINK)
+
+static void io_submit_sqe(struct io_ring_ctx *ctx, struct sqe_submit *s,
+			  struct io_submit_state *state, struct io_kiocb **link)
+{
+	struct io_uring_sqe *sqe_copy;
+	struct io_kiocb *req;
+	int ret;
+
+	/* enforce forwards compatibility on users */
+	if (unlikely(s->sqe->flags & ~SQE_VALID_FLAGS)) {
+		ret = -EINVAL;
+		goto err;
+	}
+
+	req = io_get_req(ctx, state);
+	if (unlikely(!req)) {
+		ret = -EAGAIN;
+		goto err;
+	}
+
+	ret = io_req_set_file(ctx, s, state, req);
+	if (unlikely(ret)) {
+err_req:
+		io_free_req(req);
+err:
+		io_cqring_add_event(ctx, s->sqe->user_data, ret);
+		return;
+	}
+
+	ret = io_req_defer(ctx, req, s->sqe);
+	if (ret) {
+		if (ret != -EIOCBQUEUED)
+			goto err_req;
+		return;
+	}
+
+	/*
+	 * If we already have a head request, queue this one for async
+	 * submittal once the head completes. If we don't have a head but
+	 * IOSQE_IO_LINK is set in the sqe, start a new head. This one will be
+	 * submitted sync once the chain is complete. If none of those
+	 * conditions are true (normal request), then just queue it.
+	 */
+	if (*link) {
+		struct io_kiocb *prev = *link;
+
+		sqe_copy = kmemdup(s->sqe, sizeof(*sqe_copy), GFP_KERNEL);
+		if (!sqe_copy) {
+			ret = -EAGAIN;
+			goto err_req;
+		}
+
+		s->sqe = sqe_copy;
+		memcpy(&req->submit, s, sizeof(*s));
+		list_add_tail(&req->list, &prev->link_list);
+	} else if (s->sqe->flags & IOSQE_IO_LINK) {
+		req->flags |= REQ_F_LINK;
+
+		memcpy(&req->submit, s, sizeof(*s));
+		INIT_LIST_HEAD(&req->link_list);
+		*link = req;
+	} else {
+		io_queue_sqe(ctx, req, s);
+	}
+}
+
+/*
+ * Batched submission is done, ensure local IO is flushed out.
+ */
+static void io_submit_state_end(struct io_submit_state *state)
+{
+	blk_finish_plug(&state->plug);
+	io_file_put(state);
+	if (state->free_reqs)
+		kmem_cache_free_bulk(req_cachep, state->free_reqs,
+					&state->reqs[state->cur_req]);
+}
+
+/*
+ * Start submission side cache.
+ */
+static void io_submit_state_start(struct io_submit_state *state,
+				  struct io_ring_ctx *ctx, unsigned max_ios)
+{
+	blk_start_plug(&state->plug);
+	state->free_reqs = 0;
+	state->file = NULL;
+	state->ios_left = max_ios;
+}
+
+static void io_commit_sqring(struct io_ring_ctx *ctx)
+{
+	struct io_sq_ring *ring = ctx->sq_ring;
+
+	if (ctx->cached_sq_head != READ_ONCE(ring->r.head)) {
+		/*
+		 * Ensure any loads from the SQEs are done at this point,
+		 * since once we write the new head, the application could
+		 * write new data to them.
+		 */
+		smp_store_release(&ring->r.head, ctx->cached_sq_head);
+	}
+}
+
+/*
+ * Fetch an sqe, if one is available. Note that s->sqe will point to memory
+ * that is mapped by userspace. This means that care needs to be taken to
+ * ensure that reads are stable, as we cannot rely on userspace always
+ * being a good citizen. If members of the sqe are validated and then later
+ * used, it's important that those reads are done through READ_ONCE() to
+ * prevent a re-load down the line.
+ */
+static bool io_get_sqring(struct io_ring_ctx *ctx, struct sqe_submit *s)
+{
+	struct io_sq_ring *ring = ctx->sq_ring;
+	unsigned head;
+
+	/*
+	 * The cached sq head (or cq tail) serves two purposes:
+	 *
+	 * 1) allows us to batch the cost of updating the user visible
+	 *    head updates.
+	 * 2) allows the kernel side to track the head on its own, even
+	 *    though the application is the one updating it.
+	 */
+	head = ctx->cached_sq_head;
+	/* make sure SQ entry isn't read before tail */
+	if (head == smp_load_acquire(&ring->r.tail))
+		return false;
+
+	head = READ_ONCE(ring->array[head & ctx->sq_mask]);
+	if (head < ctx->sq_entries) {
+		s->index = head;
+		s->sqe = &ctx->sq_sqes[head];
+		ctx->cached_sq_head++;
+		return true;
+	}
+
+	/* drop invalid entries */
+	ctx->cached_sq_head++;
+	ring->dropped++;
+	return false;
+}
+
+static int io_submit_sqes(struct io_ring_ctx *ctx, struct sqe_submit *sqes,
+			  unsigned int nr, bool has_user, bool mm_fault)
+{
+	struct io_submit_state state, *statep = NULL;
+	struct io_kiocb *link = NULL;
+	bool prev_was_link = false;
+	int i, submitted = 0;
+
+	if (nr > IO_PLUG_THRESHOLD) {
+		io_submit_state_start(&state, ctx, nr);
+		statep = &state;
+	}
+
+	for (i = 0; i < nr; i++) {
+		/*
+		 * If previous wasn't linked and we have a linked command,
+		 * that's the end of the chain. Submit the previous link.
+		 */
+		if (!prev_was_link && link) {
+			io_queue_sqe(ctx, link, &link->submit);
+			link = NULL;
+		}
+		prev_was_link = (sqes[i].sqe->flags & IOSQE_IO_LINK) != 0;
+
+		if (unlikely(mm_fault)) {
+			io_cqring_add_event(ctx, sqes[i].sqe->user_data,
+						-EFAULT);
+		} else {
+			sqes[i].has_user = has_user;
+			sqes[i].needs_lock = true;
+			sqes[i].needs_fixed_file = true;
+			io_submit_sqe(ctx, &sqes[i], statep, &link);
+			submitted++;
+		}
+	}
+
+	if (link)
+		io_queue_sqe(ctx, link, &link->submit);
+	if (statep)
+		io_submit_state_end(&state);
+
+	return submitted;
+}
+
+static int io_sq_thread(void *data)
+{
+	struct sqe_submit sqes[IO_IOPOLL_BATCH];
+	struct io_ring_ctx *ctx = data;
+	struct mm_struct *cur_mm = NULL;
+	mm_segment_t old_fs;
+	DEFINE_WAIT(wait);
+	unsigned inflight;
+	unsigned long timeout;
+
+	complete(&ctx->sqo_thread_started);
+
+	old_fs = get_fs();
+	set_fs(USER_DS);
+
+	timeout = inflight = 0;
+	while (!kthread_should_park()) {
+		bool all_fixed, mm_fault = false;
+		int i;
+
+		if (inflight) {
+			unsigned nr_events = 0;
+
+			if (ctx->flags & IORING_SETUP_IOPOLL) {
+				/*
+				 * We disallow the app entering submit/complete
+				 * with polling, but we still need to lock the
+				 * ring to prevent racing with polled issue
+				 * that got punted to a workqueue.
+				 */
+				mutex_lock(&ctx->uring_lock);
+				io_iopoll_check(ctx, &nr_events, 0);
+				mutex_unlock(&ctx->uring_lock);
+			} else {
+				/*
+				 * Normal IO, just pretend everything completed.
+				 * We don't have to poll completions for that.
+				 */
+				nr_events = inflight;
+			}
+
+			inflight -= nr_events;
+			if (!inflight)
+				timeout = jiffies + ctx->sq_thread_idle;
+		}
+
+		if (!io_get_sqring(ctx, &sqes[0])) {
+			/*
+			 * We're polling. If we're within the defined idle
+			 * period, then let us spin without work before going
+			 * to sleep.
+			 */
+			if (inflight || !time_after(jiffies, timeout)) {
+				cpu_relax();
+				continue;
+			}
+
+			/*
+			 * Drop cur_mm before scheduling, we can't hold it for
+			 * long periods (or over schedule()). Do this before
+			 * adding ourselves to the waitqueue, as the unuse/drop
+			 * may sleep.
+			 */
+			if (cur_mm) {
+				unuse_mm(cur_mm);
+				mmput(cur_mm);
+				cur_mm = NULL;
+			}
+
+			prepare_to_wait(&ctx->sqo_wait, &wait,
+						TASK_INTERRUPTIBLE);
+
+			/* Tell userspace we may need a wakeup call */
+			ctx->sq_ring->flags |= IORING_SQ_NEED_WAKEUP;
+			/* make sure to read SQ tail after writing flags */
+			smp_mb();
+
+			if (!io_get_sqring(ctx, &sqes[0])) {
+				if (kthread_should_park()) {
+					finish_wait(&ctx->sqo_wait, &wait);
+					break;
+				}
+				if (signal_pending(current))
+					flush_signals(current);
+				schedule();
+				finish_wait(&ctx->sqo_wait, &wait);
+
+				ctx->sq_ring->flags &= ~IORING_SQ_NEED_WAKEUP;
+				continue;
+			}
+			finish_wait(&ctx->sqo_wait, &wait);
+
+			ctx->sq_ring->flags &= ~IORING_SQ_NEED_WAKEUP;
+		}
+
+		i = 0;
+		all_fixed = true;
+		do {
+			if (all_fixed && io_sqe_needs_user(sqes[i].sqe))
+				all_fixed = false;
+
+			i++;
+			if (i == ARRAY_SIZE(sqes))
+				break;
+		} while (io_get_sqring(ctx, &sqes[i]));
+
+		/* Unless all new commands are FIXED regions, grab mm */
+		if (!all_fixed && !cur_mm) {
+			mm_fault = !mmget_not_zero(ctx->sqo_mm);
+			if (!mm_fault) {
+				use_mm(ctx->sqo_mm);
+				cur_mm = ctx->sqo_mm;
+			}
+		}
+
+		inflight += io_submit_sqes(ctx, sqes, i, cur_mm != NULL,
+						mm_fault);
+
+		/* Commit SQ ring head once we've consumed all SQEs */
+		io_commit_sqring(ctx);
+	}
+
+	set_fs(old_fs);
+	if (cur_mm) {
+		unuse_mm(cur_mm);
+		mmput(cur_mm);
+	}
+
+	kthread_parkme();
+
+	return 0;
+}
+
+static int io_ring_submit(struct io_ring_ctx *ctx, unsigned int to_submit)
+{
+	struct io_submit_state state, *statep = NULL;
+	struct io_kiocb *link = NULL;
+	bool prev_was_link = false;
+	int i, submit = 0;
+
+	if (to_submit > IO_PLUG_THRESHOLD) {
+		io_submit_state_start(&state, ctx, to_submit);
+		statep = &state;
+	}
+
+	for (i = 0; i < to_submit; i++) {
+		struct sqe_submit s;
+
+		if (!io_get_sqring(ctx, &s))
+			break;
+
+		/*
+		 * If previous wasn't linked and we have a linked command,
+		 * that's the end of the chain. Submit the previous link.
+		 */
+		if (!prev_was_link && link) {
+			io_queue_sqe(ctx, link, &link->submit);
+			link = NULL;
+		}
+		prev_was_link = (s.sqe->flags & IOSQE_IO_LINK) != 0;
+
+		s.has_user = true;
+		s.needs_lock = false;
+		s.needs_fixed_file = false;
+		submit++;
+		io_submit_sqe(ctx, &s, statep, &link);
+	}
+	io_commit_sqring(ctx);
+
+	if (link)
+		io_queue_sqe(ctx, link, &link->submit);
+	if (statep)
+		io_submit_state_end(statep);
+
+	return submit;
+}
+
+static unsigned io_cqring_events(struct io_cq_ring *ring)
+{
+	/* See comment at the top of this file */
+	smp_rmb();
+	return READ_ONCE(ring->r.tail) - READ_ONCE(ring->r.head);
+}
+
+/*
+ * Wait until events become available, if we don't already have some. The
+ * application must reap them itself, as they reside on the shared cq ring.
+ */
+static int io_cqring_wait(struct io_ring_ctx *ctx, int min_events,
+			  const sigset_t __user *sig, size_t sigsz)
+{
+	struct io_cq_ring *ring = ctx->cq_ring;
+	sigset_t ksigmask, sigsaved;
+	int ret;
+
+	if (io_cqring_events(ring) >= min_events)
+		return 0;
+
+	if (sig) {
+#ifdef CONFIG_COMPAT
+		if (in_compat_syscall())
+			ret = set_compat_user_sigmask((const compat_sigset_t __user *)sig,
+						      &ksigmask, &sigsaved, sigsz);
+		else
+#endif
+			ret = set_user_sigmask(sig, &ksigmask,
+					       &sigsaved, sigsz);
+
+		if (ret)
+			return ret;
+	}
+
+	ret = wait_event_interruptible(ctx->wait, io_cqring_events(ring) >= min_events);
+
+	if (sig)
+		restore_user_sigmask(sig, &sigsaved, ret == -ERESTARTSYS);
+
+	if (ret == -ERESTARTSYS)
+		ret = -EINTR;
+
+	return READ_ONCE(ring->r.head) == READ_ONCE(ring->r.tail) ? ret : 0;
+}
+
+static void __io_sqe_files_unregister(struct io_ring_ctx *ctx)
+{
+#if defined(CONFIG_UNIX)
+	if (ctx->ring_sock) {
+		struct sock *sock = ctx->ring_sock->sk;
+		struct sk_buff *skb;
+
+		while ((skb = skb_dequeue(&sock->sk_receive_queue)) != NULL)
+			kfree_skb(skb);
+	}
+#else
+	int i;
+
+	for (i = 0; i < ctx->nr_user_files; i++)
+		fput(ctx->user_files[i]);
+#endif
+}
+
+static int io_sqe_files_unregister(struct io_ring_ctx *ctx)
+{
+	if (!ctx->user_files)
+		return -ENXIO;
+
+	__io_sqe_files_unregister(ctx);
+	kfree(ctx->user_files);
+	ctx->user_files = NULL;
+	ctx->nr_user_files = 0;
+	return 0;
+}
+
+static void io_sq_thread_stop(struct io_ring_ctx *ctx)
+{
+	if (ctx->sqo_thread) {
+		wait_for_completion(&ctx->sqo_thread_started);
+		/*
+		 * The park is a bit of a work-around, without it we get
+		 * warning spews on shutdown with SQPOLL set and affinity
+		 * set to a single CPU.
+		 */
+		kthread_park(ctx->sqo_thread);
+		kthread_stop(ctx->sqo_thread);
+		ctx->sqo_thread = NULL;
+	}
+}
+
+static void io_finish_async(struct io_ring_ctx *ctx)
+{
+	io_sq_thread_stop(ctx);
+
+	if (ctx->sqo_wq) {
+		destroy_workqueue(ctx->sqo_wq);
+		ctx->sqo_wq = NULL;
+	}
+}
+
+#if defined(CONFIG_UNIX)
+static void io_destruct_skb(struct sk_buff *skb)
+{
+	struct io_ring_ctx *ctx = skb->sk->sk_user_data;
+
+	io_finish_async(ctx);
+	unix_destruct_scm(skb);
+}
+
+/*
+ * Ensure the UNIX gc is aware of our file set, so we are certain that
+ * the io_uring can be safely unregistered on process exit, even if we have
+ * loops in the file referencing.
+ */
+static int __io_sqe_files_scm(struct io_ring_ctx *ctx, int nr, int offset)
+{
+	struct sock *sk = ctx->ring_sock->sk;
+	struct scm_fp_list *fpl;
+	struct sk_buff *skb;
+	int i;
+
+	if (!capable(CAP_SYS_RESOURCE) && !capable(CAP_SYS_ADMIN)) {
+		unsigned long inflight = ctx->user->unix_inflight + nr;
+
+		if (inflight > task_rlimit(current, RLIMIT_NOFILE))
+			return -EMFILE;
+	}
+
+	fpl = kzalloc(sizeof(*fpl), GFP_KERNEL);
+	if (!fpl)
+		return -ENOMEM;
+
+	skb = alloc_skb(0, GFP_KERNEL);
+	if (!skb) {
+		kfree(fpl);
+		return -ENOMEM;
+	}
+
+	skb->sk = sk;
+	skb->destructor = io_destruct_skb;
+
+	fpl->user = get_uid(ctx->user);
+	for (i = 0; i < nr; i++) {
+		fpl->fp[i] = get_file(ctx->user_files[i + offset]);
+		unix_inflight(fpl->user, fpl->fp[i]);
+	}
+
+	fpl->max = fpl->count = nr;
+	UNIXCB(skb).fp = fpl;
+	refcount_add(skb->truesize, &sk->sk_wmem_alloc);
+	skb_queue_head(&sk->sk_receive_queue, skb);
+
+	for (i = 0; i < nr; i++)
+		fput(fpl->fp[i]);
+
+	return 0;
+}
+
+/*
+ * If UNIX sockets are enabled, fd passing can cause a reference cycle which
+ * causes regular reference counting to break down. We rely on the UNIX
+ * garbage collection to take care of this problem for us.
+ */
+static int io_sqe_files_scm(struct io_ring_ctx *ctx)
+{
+	unsigned left, total;
+	int ret = 0;
+
+	total = 0;
+	left = ctx->nr_user_files;
+	while (left) {
+		unsigned this_files = min_t(unsigned, left, SCM_MAX_FD);
+
+		ret = __io_sqe_files_scm(ctx, this_files, total);
+		if (ret)
+			break;
+		left -= this_files;
+		total += this_files;
+	}
+
+	if (!ret)
+		return 0;
+
+	while (total < ctx->nr_user_files) {
+		fput(ctx->user_files[total]);
+		total++;
+	}
+
+	return ret;
+}
+#else
+static int io_sqe_files_scm(struct io_ring_ctx *ctx)
+{
+	return 0;
+}
+#endif
+
+static int io_sqe_files_register(struct io_ring_ctx *ctx, void __user *arg,
+				 unsigned nr_args)
+{
+	__s32 __user *fds = (__s32 __user *) arg;
+	int fd, ret = 0;
+	unsigned i;
+
+	if (ctx->user_files)
+		return -EBUSY;
+	if (!nr_args)
+		return -EINVAL;
+	if (nr_args > IORING_MAX_FIXED_FILES)
+		return -EMFILE;
+
+	ctx->user_files = kcalloc(nr_args, sizeof(struct file *), GFP_KERNEL);
+	if (!ctx->user_files)
+		return -ENOMEM;
+
+	for (i = 0; i < nr_args; i++) {
+		ret = -EFAULT;
+		if (copy_from_user(&fd, &fds[i], sizeof(fd)))
+			break;
+
+		ctx->user_files[i] = fget(fd);
+
+		ret = -EBADF;
+		if (!ctx->user_files[i])
+			break;
+		/*
+		 * Don't allow io_uring instances to be registered. If UNIX
+		 * isn't enabled, then this causes a reference cycle and this
+		 * instance can never get freed. If UNIX is enabled we'll
+		 * handle it just fine, but there's still no point in allowing
+		 * a ring fd as it doesn't support regular read/write anyway.
+		 */
+		if (ctx->user_files[i]->f_op == &io_uring_fops) {
+			fput(ctx->user_files[i]);
+			break;
+		}
+		ctx->nr_user_files++;
+		ret = 0;
+	}
+
+	if (ret) {
+		for (i = 0; i < ctx->nr_user_files; i++)
+			fput(ctx->user_files[i]);
+
+		kfree(ctx->user_files);
+		ctx->user_files = NULL;
+		ctx->nr_user_files = 0;
+		return ret;
+	}
+
+	ret = io_sqe_files_scm(ctx);
+	if (ret)
+		io_sqe_files_unregister(ctx);
+
+	return ret;
+}
+
+static int io_sq_offload_start(struct io_ring_ctx *ctx,
+			       struct io_uring_params *p)
+{
+	int ret;
+
+	init_waitqueue_head(&ctx->sqo_wait);
+	mmgrab(current->mm);
+	ctx->sqo_mm = current->mm;
+
+	if (ctx->flags & IORING_SETUP_SQPOLL) {
+		ret = -EPERM;
+		if (!capable(CAP_SYS_ADMIN))
+			goto err;
+
+		ctx->sq_thread_idle = msecs_to_jiffies(p->sq_thread_idle);
+		if (!ctx->sq_thread_idle)
+			ctx->sq_thread_idle = HZ;
+
+		if (p->flags & IORING_SETUP_SQ_AFF) {
+			int cpu = p->sq_thread_cpu;
+
+			ret = -EINVAL;
+			if (cpu >= nr_cpu_ids)
+				goto err;
+			if (!cpu_online(cpu))
+				goto err;
+
+			ctx->sqo_thread = kthread_create_on_cpu(io_sq_thread,
+							ctx, cpu,
+							"io_uring-sq");
+		} else {
+			ctx->sqo_thread = kthread_create(io_sq_thread, ctx,
+							"io_uring-sq");
+		}
+		if (IS_ERR(ctx->sqo_thread)) {
+			ret = PTR_ERR(ctx->sqo_thread);
+			ctx->sqo_thread = NULL;
+			goto err;
+		}
+		wake_up_process(ctx->sqo_thread);
+	} else if (p->flags & IORING_SETUP_SQ_AFF) {
+		/* Can't have SQ_AFF without SQPOLL */
+		ret = -EINVAL;
+		goto err;
+	}
+
+	/* Do QD, or 2 * CPUS, whatever is smallest */
+	ctx->sqo_wq = alloc_workqueue("io_ring-wq", WQ_UNBOUND | WQ_FREEZABLE,
+			min(ctx->sq_entries - 1, 2 * num_online_cpus()));
+	if (!ctx->sqo_wq) {
+		ret = -ENOMEM;
+		goto err;
+	}
+
+	return 0;
+err:
+	io_sq_thread_stop(ctx);
+	mmdrop(ctx->sqo_mm);
+	ctx->sqo_mm = NULL;
+	return ret;
+}
+
+static void io_unaccount_mem(struct user_struct *user, unsigned long nr_pages)
+{
+	atomic_long_sub(nr_pages, &user->locked_vm);
+}
+
+static int io_account_mem(struct user_struct *user, unsigned long nr_pages)
+{
+	unsigned long page_limit, cur_pages, new_pages;
+
+	/* Don't allow more pages than we can safely lock */
+	page_limit = rlimit(RLIMIT_MEMLOCK) >> PAGE_SHIFT;
+
+	do {
+		cur_pages = atomic_long_read(&user->locked_vm);
+		new_pages = cur_pages + nr_pages;
+		if (new_pages > page_limit)
+			return -ENOMEM;
+	} while (atomic_long_cmpxchg(&user->locked_vm, cur_pages,
+					new_pages) != cur_pages);
+
+	return 0;
+}
+
+static void io_mem_free(void *ptr)
+{
+	struct page *page;
+
+	if (!ptr)
+		return;
+
+	page = virt_to_head_page(ptr);
+	if (put_page_testzero(page))
+		free_compound_page(page);
+}
+
+static void *io_mem_alloc(size_t size)
+{
+	gfp_t gfp_flags = GFP_KERNEL | __GFP_ZERO | __GFP_NOWARN | __GFP_COMP |
+				__GFP_NORETRY;
+
+	return (void *) __get_free_pages(gfp_flags, get_order(size));
+}
+
+static unsigned long ring_pages(unsigned sq_entries, unsigned cq_entries)
+{
+	struct io_sq_ring *sq_ring;
+	struct io_cq_ring *cq_ring;
+	size_t bytes;
+
+	bytes = struct_size(sq_ring, array, sq_entries);
+	bytes += array_size(sizeof(struct io_uring_sqe), sq_entries);
+	bytes += struct_size(cq_ring, cqes, cq_entries);
+
+	return (bytes + PAGE_SIZE - 1) / PAGE_SIZE;
+}
+
+static int io_sqe_buffer_unregister(struct io_ring_ctx *ctx)
+{
+	int i, j;
+
+	if (!ctx->user_bufs)
+		return -ENXIO;
+
+	for (i = 0; i < ctx->nr_user_bufs; i++) {
+		struct io_mapped_ubuf *imu = &ctx->user_bufs[i];
+
+		for (j = 0; j < imu->nr_bvecs; j++)
+			put_page(imu->bvec[j].bv_page);
+
+		if (ctx->account_mem)
+			io_unaccount_mem(ctx->user, imu->nr_bvecs);
+		kvfree(imu->bvec);
+		imu->nr_bvecs = 0;
+	}
+
+	kfree(ctx->user_bufs);
+	ctx->user_bufs = NULL;
+	ctx->nr_user_bufs = 0;
+	return 0;
+}
+
+static int io_copy_iov(struct io_ring_ctx *ctx, struct iovec *dst,
+		       void __user *arg, unsigned index)
+{
+	struct iovec __user *src;
+
+#ifdef CONFIG_COMPAT
+	if (ctx->compat) {
+		struct compat_iovec __user *ciovs;
+		struct compat_iovec ciov;
+
+		ciovs = (struct compat_iovec __user *) arg;
+		if (copy_from_user(&ciov, &ciovs[index], sizeof(ciov)))
+			return -EFAULT;
+
+		dst->iov_base = (void __user *) (unsigned long) ciov.iov_base;
+		dst->iov_len = ciov.iov_len;
+		return 0;
+	}
+#endif
+	src = (struct iovec __user *) arg;
+	if (copy_from_user(dst, &src[index], sizeof(*dst)))
+		return -EFAULT;
+	return 0;
+}
+
+static int io_sqe_buffer_register(struct io_ring_ctx *ctx, void __user *arg,
+				  unsigned nr_args)
+{
+	struct vm_area_struct **vmas = NULL;
+	struct page **pages = NULL;
+	int i, j, got_pages = 0;
+	int ret = -EINVAL;
+
+	if (ctx->user_bufs)
+		return -EBUSY;
+	if (!nr_args || nr_args > UIO_MAXIOV)
+		return -EINVAL;
+
+	ctx->user_bufs = kcalloc(nr_args, sizeof(struct io_mapped_ubuf),
+					GFP_KERNEL);
+	if (!ctx->user_bufs)
+		return -ENOMEM;
+
+	for (i = 0; i < nr_args; i++) {
+		struct io_mapped_ubuf *imu = &ctx->user_bufs[i];
+		unsigned long off, start, end, ubuf;
+		int pret, nr_pages;
+		struct iovec iov;
+		size_t size;
+
+		ret = io_copy_iov(ctx, &iov, arg, i);
+		if (ret)
+			goto err;
+
+		/*
+		 * Don't impose further limits on the size and buffer
+		 * constraints here, we'll -EINVAL later when IO is
+		 * submitted if they are wrong.
+		 */
+		ret = -EFAULT;
+		if (!iov.iov_base || !iov.iov_len)
+			goto err;
+
+		/* arbitrary limit, but we need something */
+		if (iov.iov_len > SZ_1G)
+			goto err;
+
+		ubuf = (unsigned long) iov.iov_base;
+		end = (ubuf + iov.iov_len + PAGE_SIZE - 1) >> PAGE_SHIFT;
+		start = ubuf >> PAGE_SHIFT;
+		nr_pages = end - start;
+
+		if (ctx->account_mem) {
+			ret = io_account_mem(ctx->user, nr_pages);
+			if (ret)
+				goto err;
+		}
+
+		ret = 0;
+		if (!pages || nr_pages > got_pages) {
+			kfree(vmas);
+			kfree(pages);
+			pages = kvmalloc_array(nr_pages, sizeof(struct page *),
+						GFP_KERNEL);
+			vmas = kvmalloc_array(nr_pages,
+					sizeof(struct vm_area_struct *),
+					GFP_KERNEL);
+			if (!pages || !vmas) {
+				ret = -ENOMEM;
+				if (ctx->account_mem)
+					io_unaccount_mem(ctx->user, nr_pages);
+				goto err;
+			}
+			got_pages = nr_pages;
+		}
+
+		imu->bvec = kvmalloc_array(nr_pages, sizeof(struct bio_vec),
+						GFP_KERNEL);
+		ret = -ENOMEM;
+		if (!imu->bvec) {
+			if (ctx->account_mem)
+				io_unaccount_mem(ctx->user, nr_pages);
+			goto err;
+		}
+
+		ret = 0;
+		down_read(&current->mm->mmap_sem);
+		pret = get_user_pages(ubuf, nr_pages,
+				      FOLL_WRITE | FOLL_LONGTERM,
+				      pages, vmas);
+		if (pret == nr_pages) {
+			/* don't support file backed memory */
+			for (j = 0; j < nr_pages; j++) {
+				struct vm_area_struct *vma = vmas[j];
+
+				if (vma->vm_file &&
+				    !is_file_hugepages(vma->vm_file)) {
+					ret = -EOPNOTSUPP;
+					break;
+				}
+			}
+		} else {
+			ret = pret < 0 ? pret : -EFAULT;
+		}
+		up_read(&current->mm->mmap_sem);
+		if (ret) {
+			/*
+			 * if we did partial map, or found file backed vmas,
+			 * release any pages we did get
+			 */
+			if (pret > 0) {
+				for (j = 0; j < pret; j++)
+					put_page(pages[j]);
+			}
+			if (ctx->account_mem)
+				io_unaccount_mem(ctx->user, nr_pages);
+			kvfree(imu->bvec);
+			goto err;
+		}
+
+		off = ubuf & ~PAGE_MASK;
+		size = iov.iov_len;
+		for (j = 0; j < nr_pages; j++) {
+			size_t vec_len;
+
+			vec_len = min_t(size_t, size, PAGE_SIZE - off);
+			imu->bvec[j].bv_page = pages[j];
+			imu->bvec[j].bv_len = vec_len;
+			imu->bvec[j].bv_offset = off;
+			off = 0;
+			size -= vec_len;
+		}
+		/* store original address for later verification */
+		imu->ubuf = ubuf;
+		imu->len = iov.iov_len;
+		imu->nr_bvecs = nr_pages;
+
+		ctx->nr_user_bufs++;
+	}
+	kvfree(pages);
+	kvfree(vmas);
+	return 0;
+err:
+	kvfree(pages);
+	kvfree(vmas);
+	io_sqe_buffer_unregister(ctx);
+	return ret;
+}
+
+static int io_eventfd_register(struct io_ring_ctx *ctx, void __user *arg)
+{
+	__s32 __user *fds = arg;
+	int fd;
+
+	if (ctx->cq_ev_fd)
+		return -EBUSY;
+
+	if (copy_from_user(&fd, fds, sizeof(*fds)))
+		return -EFAULT;
+
+	ctx->cq_ev_fd = eventfd_ctx_fdget(fd);
+	if (IS_ERR(ctx->cq_ev_fd)) {
+		int ret = PTR_ERR(ctx->cq_ev_fd);
+		ctx->cq_ev_fd = NULL;
+		return ret;
+	}
+
+	return 0;
+}
+
+static int io_eventfd_unregister(struct io_ring_ctx *ctx)
+{
+	if (ctx->cq_ev_fd) {
+		eventfd_ctx_put(ctx->cq_ev_fd);
+		ctx->cq_ev_fd = NULL;
+		return 0;
+	}
+
+	return -ENXIO;
+}
+
+static void io_ring_ctx_free(struct io_ring_ctx *ctx)
+{
+	io_finish_async(ctx);
+	if (ctx->sqo_mm)
+		mmdrop(ctx->sqo_mm);
+
+	io_iopoll_reap_events(ctx);
+	io_sqe_buffer_unregister(ctx);
+	io_sqe_files_unregister(ctx);
+	io_eventfd_unregister(ctx);
+
+#if defined(CONFIG_UNIX)
+	if (ctx->ring_sock) {
+		ctx->ring_sock->file = NULL; /* so that iput() is called */
+		sock_release(ctx->ring_sock);
+	}
+#endif
+
+	io_mem_free(ctx->sq_ring);
+	io_mem_free(ctx->sq_sqes);
+	io_mem_free(ctx->cq_ring);
+
+	percpu_ref_exit(&ctx->refs);
+	if (ctx->account_mem)
+		io_unaccount_mem(ctx->user,
+				ring_pages(ctx->sq_entries, ctx->cq_entries));
+	free_uid(ctx->user);
+	kfree(ctx);
+}
+
+static __poll_t io_uring_poll(struct file *file, poll_table *wait)
+{
+	struct io_ring_ctx *ctx = file->private_data;
+	__poll_t mask = 0;
+
+	poll_wait(file, &ctx->cq_wait, wait);
+	/*
+	 * synchronizes with barrier from wq_has_sleeper call in
+	 * io_commit_cqring
+	 */
+	smp_rmb();
+	if (READ_ONCE(ctx->sq_ring->r.tail) - ctx->cached_sq_head !=
+	    ctx->sq_ring->ring_entries)
+		mask |= EPOLLOUT | EPOLLWRNORM;
+	if (READ_ONCE(ctx->cq_ring->r.head) != ctx->cached_cq_tail)
+		mask |= EPOLLIN | EPOLLRDNORM;
+
+	return mask;
+}
+
+static int io_uring_fasync(int fd, struct file *file, int on)
+{
+	struct io_ring_ctx *ctx = file->private_data;
+
+	return fasync_helper(fd, file, on, &ctx->cq_fasync);
+}
+
+static void io_ring_ctx_wait_and_kill(struct io_ring_ctx *ctx)
+{
+	mutex_lock(&ctx->uring_lock);
+	percpu_ref_kill(&ctx->refs);
+	mutex_unlock(&ctx->uring_lock);
+
+	io_poll_remove_all(ctx);
+	io_iopoll_reap_events(ctx);
+	wait_for_completion(&ctx->ctx_done);
+	io_ring_ctx_free(ctx);
+}
+
+static int io_uring_release(struct inode *inode, struct file *file)
+{
+	struct io_ring_ctx *ctx = file->private_data;
+
+	file->private_data = NULL;
+	io_ring_ctx_wait_and_kill(ctx);
+	return 0;
+}
+
+static int io_uring_mmap(struct file *file, struct vm_area_struct *vma)
+{
+	loff_t offset = (loff_t) vma->vm_pgoff << PAGE_SHIFT;
+	unsigned long sz = vma->vm_end - vma->vm_start;
+	struct io_ring_ctx *ctx = file->private_data;
+	unsigned long pfn;
+	struct page *page;
+	void *ptr;
+
+	switch (offset) {
+	case IORING_OFF_SQ_RING:
+		ptr = ctx->sq_ring;
+		break;
+	case IORING_OFF_SQES:
+		ptr = ctx->sq_sqes;
+		break;
+	case IORING_OFF_CQ_RING:
+		ptr = ctx->cq_ring;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	page = virt_to_head_page(ptr);
+	if (sz > (PAGE_SIZE << compound_order(page)))
+		return -EINVAL;
+
+	pfn = virt_to_phys(ptr) >> PAGE_SHIFT;
+	return remap_pfn_range(vma, vma->vm_start, pfn, sz, vma->vm_page_prot);
+}
+
+SYSCALL_DEFINE6(io_uring_enter, unsigned int, fd, u32, to_submit,
+		u32, min_complete, u32, flags, const sigset_t __user *, sig,
+		size_t, sigsz)
+{
+	struct io_ring_ctx *ctx;
+	long ret = -EBADF;
+	int submitted = 0;
+	struct fd f;
+
+	if (flags & ~(IORING_ENTER_GETEVENTS | IORING_ENTER_SQ_WAKEUP))
+		return -EINVAL;
+
+	f = fdget(fd);
+	if (!f.file)
+		return -EBADF;
+
+	ret = -EOPNOTSUPP;
+	if (f.file->f_op != &io_uring_fops)
+		goto out_fput;
+
+	ret = -ENXIO;
+	ctx = f.file->private_data;
+	if (!percpu_ref_tryget(&ctx->refs))
+		goto out_fput;
+
+	/*
+	 * For SQ polling, the thread will do all submissions and completions.
+	 * Just return the requested submit count, and wake the thread if
+	 * we were asked to.
+	 */
+	if (ctx->flags & IORING_SETUP_SQPOLL) {
+		if (flags & IORING_ENTER_SQ_WAKEUP)
+			wake_up(&ctx->sqo_wait);
+		submitted = to_submit;
+		goto out_ctx;
+	}
+
+	ret = 0;
+	if (to_submit) {
+		to_submit = min(to_submit, ctx->sq_entries);
+
+		mutex_lock(&ctx->uring_lock);
+		submitted = io_ring_submit(ctx, to_submit);
+		mutex_unlock(&ctx->uring_lock);
+	}
+	if (flags & IORING_ENTER_GETEVENTS) {
+		unsigned nr_events = 0;
+
+		min_complete = min(min_complete, ctx->cq_entries);
+
+		if (ctx->flags & IORING_SETUP_IOPOLL) {
+			mutex_lock(&ctx->uring_lock);
+			ret = io_iopoll_check(ctx, &nr_events, min_complete);
+			mutex_unlock(&ctx->uring_lock);
+		} else {
+			ret = io_cqring_wait(ctx, min_complete, sig, sigsz);
+		}
+	}
+
+out_ctx:
+	io_ring_drop_ctx_refs(ctx, 1);
+out_fput:
+	fdput(f);
+	return submitted ? submitted : ret;
+}
+
+static const struct file_operations io_uring_fops = {
+	.release	= io_uring_release,
+	.mmap		= io_uring_mmap,
+	.poll		= io_uring_poll,
+	.fasync		= io_uring_fasync,
+};
+
+static int io_allocate_scq_urings(struct io_ring_ctx *ctx,
+				  struct io_uring_params *p)
+{
+	struct io_sq_ring *sq_ring;
+	struct io_cq_ring *cq_ring;
+	size_t size;
+
+	sq_ring = io_mem_alloc(struct_size(sq_ring, array, p->sq_entries));
+	if (!sq_ring)
+		return -ENOMEM;
+
+	ctx->sq_ring = sq_ring;
+	sq_ring->ring_mask = p->sq_entries - 1;
+	sq_ring->ring_entries = p->sq_entries;
+	ctx->sq_mask = sq_ring->ring_mask;
+	ctx->sq_entries = sq_ring->ring_entries;
+
+	size = array_size(sizeof(struct io_uring_sqe), p->sq_entries);
+	if (size == SIZE_MAX)
+		return -EOVERFLOW;
+
+	ctx->sq_sqes = io_mem_alloc(size);
+	if (!ctx->sq_sqes)
+		return -ENOMEM;
+
+	cq_ring = io_mem_alloc(struct_size(cq_ring, cqes, p->cq_entries));
+	if (!cq_ring)
+		return -ENOMEM;
+
+	ctx->cq_ring = cq_ring;
+	cq_ring->ring_mask = p->cq_entries - 1;
+	cq_ring->ring_entries = p->cq_entries;
+	ctx->cq_mask = cq_ring->ring_mask;
+	ctx->cq_entries = cq_ring->ring_entries;
+	return 0;
+}
+
+/*
+ * Allocate an anonymous fd, this is what constitutes the application
+ * visible backing of an io_uring instance. The application mmaps this
+ * fd to gain access to the SQ/CQ ring details. If UNIX sockets are enabled,
+ * we have to tie this fd to a socket for file garbage collection purposes.
+ */
+static int io_uring_get_fd(struct io_ring_ctx *ctx)
+{
+	struct file *file;
+	int ret;
+
+#if defined(CONFIG_UNIX)
+	ret = sock_create_kern(&init_net, PF_UNIX, SOCK_RAW, IPPROTO_IP,
+				&ctx->ring_sock);
+	if (ret)
+		return ret;
+#endif
+
+	ret = get_unused_fd_flags(O_RDWR | O_CLOEXEC);
+	if (ret < 0)
+		goto err;
+
+	file = anon_inode_getfile("[io_uring]", &io_uring_fops, ctx,
+					O_RDWR | O_CLOEXEC);
+	if (IS_ERR(file)) {
+		put_unused_fd(ret);
+		ret = PTR_ERR(file);
+		goto err;
+	}
+
+#if defined(CONFIG_UNIX)
+	ctx->ring_sock->file = file;
+	ctx->ring_sock->sk->sk_user_data = ctx;
+#endif
+	fd_install(ret, file);
+	return ret;
+err:
+#if defined(CONFIG_UNIX)
+	sock_release(ctx->ring_sock);
+	ctx->ring_sock = NULL;
+#endif
+	return ret;
+}
+
+static int io_uring_create(unsigned entries, struct io_uring_params *p)
+{
+	struct user_struct *user = NULL;
+	struct io_ring_ctx *ctx;
+	bool account_mem;
+	int ret;
+
+	if (!entries || entries > IORING_MAX_ENTRIES)
+		return -EINVAL;
+
+	/*
+	 * Use twice as many entries for the CQ ring. It's possible for the
+	 * application to drive a higher depth than the size of the SQ ring,
+	 * since the sqes are only used at submission time. This allows for
+	 * some flexibility in overcommitting a bit.
+	 */
+	p->sq_entries = roundup_pow_of_two(entries);
+	p->cq_entries = 2 * p->sq_entries;
+
+	user = get_uid(current_user());
+	account_mem = !capable(CAP_IPC_LOCK);
+
+	if (account_mem) {
+		ret = io_account_mem(user,
+				ring_pages(p->sq_entries, p->cq_entries));
+		if (ret) {
+			free_uid(user);
+			return ret;
+		}
+	}
+
+	ctx = io_ring_ctx_alloc(p);
+	if (!ctx) {
+		if (account_mem)
+			io_unaccount_mem(user, ring_pages(p->sq_entries,
+								p->cq_entries));
+		free_uid(user);
+		return -ENOMEM;
+	}
+	ctx->compat = in_compat_syscall();
+	ctx->account_mem = account_mem;
+	ctx->user = user;
+
+	ret = io_allocate_scq_urings(ctx, p);
+	if (ret)
+		goto err;
+
+	ret = io_sq_offload_start(ctx, p);
+	if (ret)
+		goto err;
+
+	ret = io_uring_get_fd(ctx);
+	if (ret < 0)
+		goto err;
+
+	memset(&p->sq_off, 0, sizeof(p->sq_off));
+	p->sq_off.head = offsetof(struct io_sq_ring, r.head);
+	p->sq_off.tail = offsetof(struct io_sq_ring, r.tail);
+	p->sq_off.ring_mask = offsetof(struct io_sq_ring, ring_mask);
+	p->sq_off.ring_entries = offsetof(struct io_sq_ring, ring_entries);
+	p->sq_off.flags = offsetof(struct io_sq_ring, flags);
+	p->sq_off.dropped = offsetof(struct io_sq_ring, dropped);
+	p->sq_off.array = offsetof(struct io_sq_ring, array);
+
+	memset(&p->cq_off, 0, sizeof(p->cq_off));
+	p->cq_off.head = offsetof(struct io_cq_ring, r.head);
+	p->cq_off.tail = offsetof(struct io_cq_ring, r.tail);
+	p->cq_off.ring_mask = offsetof(struct io_cq_ring, ring_mask);
+	p->cq_off.ring_entries = offsetof(struct io_cq_ring, ring_entries);
+	p->cq_off.overflow = offsetof(struct io_cq_ring, overflow);
+	p->cq_off.cqes = offsetof(struct io_cq_ring, cqes);
+	return ret;
+err:
+	io_ring_ctx_wait_and_kill(ctx);
+	return ret;
+}
+
+/*
+ * Sets up an aio uring context, and returns the fd. Applications asks for a
+ * ring size, we return the actual sq/cq ring sizes (among other things) in the
+ * params structure passed in.
+ */
+static long io_uring_setup(u32 entries, struct io_uring_params __user *params)
+{
+	struct io_uring_params p;
+	long ret;
+	int i;
+
+	if (copy_from_user(&p, params, sizeof(p)))
+		return -EFAULT;
+	for (i = 0; i < ARRAY_SIZE(p.resv); i++) {
+		if (p.resv[i])
+			return -EINVAL;
+	}
+
+	if (p.flags & ~(IORING_SETUP_IOPOLL | IORING_SETUP_SQPOLL |
+			IORING_SETUP_SQ_AFF))
+		return -EINVAL;
+
+	ret = io_uring_create(entries, &p);
+	if (ret < 0)
+		return ret;
+
+	if (copy_to_user(params, &p, sizeof(p)))
+		return -EFAULT;
+
+	return ret;
+}
+
+SYSCALL_DEFINE2(io_uring_setup, u32, entries,
+		struct io_uring_params __user *, params)
+{
+	return io_uring_setup(entries, params);
+}
+
+static int __io_uring_register(struct io_ring_ctx *ctx, unsigned opcode,
+			       void __user *arg, unsigned nr_args)
+	__releases(ctx->uring_lock)
+	__acquires(ctx->uring_lock)
+{
+	int ret;
+
+	/*
+	 * We're inside the ring mutex, if the ref is already dying, then
+	 * someone else killed the ctx or is already going through
+	 * io_uring_register().
+	 */
+	if (percpu_ref_is_dying(&ctx->refs))
+		return -ENXIO;
+
+	percpu_ref_kill(&ctx->refs);
+
+	/*
+	 * Drop uring mutex before waiting for references to exit. If another
+	 * thread is currently inside io_uring_enter() it might need to grab
+	 * the uring_lock to make progress. If we hold it here across the drain
+	 * wait, then we can deadlock. It's safe to drop the mutex here, since
+	 * no new references will come in after we've killed the percpu ref.
+	 */
+	mutex_unlock(&ctx->uring_lock);
+	wait_for_completion(&ctx->ctx_done);
+	mutex_lock(&ctx->uring_lock);
+
+	switch (opcode) {
+	case IORING_REGISTER_BUFFERS:
+		ret = io_sqe_buffer_register(ctx, arg, nr_args);
+		break;
+	case IORING_UNREGISTER_BUFFERS:
+		ret = -EINVAL;
+		if (arg || nr_args)
+			break;
+		ret = io_sqe_buffer_unregister(ctx);
+		break;
+	case IORING_REGISTER_FILES:
+		ret = io_sqe_files_register(ctx, arg, nr_args);
+		break;
+	case IORING_UNREGISTER_FILES:
+		ret = -EINVAL;
+		if (arg || nr_args)
+			break;
+		ret = io_sqe_files_unregister(ctx);
+		break;
+	case IORING_REGISTER_EVENTFD:
+		ret = -EINVAL;
+		if (nr_args != 1)
+			break;
+		ret = io_eventfd_register(ctx, arg);
+		break;
+	case IORING_UNREGISTER_EVENTFD:
+		ret = -EINVAL;
+		if (arg || nr_args)
+			break;
+		ret = io_eventfd_unregister(ctx);
+		break;
+	default:
+		ret = -EINVAL;
+		break;
+	}
+
+	/* bring the ctx back to life */
+	reinit_completion(&ctx->ctx_done);
+	percpu_ref_reinit(&ctx->refs);
+	return ret;
+}
+
+SYSCALL_DEFINE4(io_uring_register, unsigned int, fd, unsigned int, opcode,
+		void __user *, arg, unsigned int, nr_args)
+{
+	struct io_ring_ctx *ctx;
+	long ret = -EBADF;
+	struct fd f;
+
+	f = fdget(fd);
+	if (!f.file)
+		return -EBADF;
+
+	ret = -EOPNOTSUPP;
+	if (f.file->f_op != &io_uring_fops)
+		goto out_fput;
+
+	ctx = f.file->private_data;
+
+	mutex_lock(&ctx->uring_lock);
+	ret = __io_uring_register(ctx, opcode, arg, nr_args);
+	mutex_unlock(&ctx->uring_lock);
+out_fput:
+	fdput(f);
+	return ret;
+}
+
+static int __init io_uring_init(void)
+{
+	req_cachep = KMEM_CACHE(io_kiocb, SLAB_HWCACHE_ALIGN | SLAB_PANIC);
+	return 0;
+};
+__initcall(io_uring_init);
diff --git a/fs/iomap.c b/fs/iomap.c
index 897c60215dd1..217c3e5a13d6 100644
--- a/fs/iomap.c
+++ b/fs/iomap.c
@@ -1,15 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0
 /*
  * Copyright (C) 2010 Red Hat, Inc.
  * Copyright (c) 2016-2018 Christoph Hellwig.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms and conditions of the GNU General Public License,
- * version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
  */
 #include <linux/module.h>
 #include <linux/compiler.h>
@@ -249,6 +241,26 @@ iomap_read_page_end_io(struct bio_vec *bvec, int error)
 }
 
 static void
+iomap_read_end_io(struct bio *bio)
+{
+	int error = blk_status_to_errno(bio->bi_status);
+	struct bio_vec *bvec;
+	struct bvec_iter_all iter_all;
+
+	bio_for_each_segment_all(bvec, bio, iter_all)
+		iomap_read_page_end_io(bvec, error);
+	bio_put(bio);
+}
+
+struct iomap_readpage_ctx {
+	struct page		*cur_page;
+	bool			cur_page_in_bio;
+	bool			is_readahead;
+	struct bio		*bio;
+	struct list_head	*pages;
+};
+
+static void
 iomap_read_inline_data(struct inode *inode, struct page *page,
 		struct iomap *iomap)
 {
@@ -268,26 +280,6 @@ iomap_read_inline_data(struct inode *inode, struct page *page,
 	SetPageUptodate(page);
 }
 
-static void
-iomap_read_end_io(struct bio *bio)
-{
-	int error = blk_status_to_errno(bio->bi_status);
-	struct bio_vec *bvec;
-	int i;
-
-	bio_for_each_segment_all(bvec, bio, i)
-		iomap_read_page_end_io(bvec, error);
-	bio_put(bio);
-}
-
-struct iomap_readpage_ctx {
-	struct page		*cur_page;
-	bool			cur_page_in_bio;
-	bool			is_readahead;
-	struct bio		*bio;
-	struct list_head	*pages;
-};
-
 static loff_t
 iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
 		struct iomap *iomap)
@@ -295,7 +287,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
 	struct iomap_readpage_ctx *ctx = data;
 	struct page *page = ctx->cur_page;
 	struct iomap_page *iop = iomap_page_create(inode, page);
-	bool is_contig = false;
+	bool same_page = false, is_contig = false;
 	loff_t orig_pos = pos;
 	unsigned poff, plen;
 	sector_t sector;
@@ -323,10 +315,14 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
 	 * Try to merge into a previous segment if we can.
 	 */
 	sector = iomap_sector(iomap, pos);
-	if (ctx->bio && bio_end_sector(ctx->bio) == sector) {
-		if (__bio_try_merge_page(ctx->bio, page, plen, poff))
-			goto done;
+	if (ctx->bio && bio_end_sector(ctx->bio) == sector)
 		is_contig = true;
+
+	if (is_contig &&
+	    __bio_try_merge_page(ctx->bio, page, plen, poff, &same_page)) {
+		if (!same_page && iop)
+			atomic_inc(&iop->read_count);
+		goto done;
 	}
 
 	/*
@@ -337,7 +333,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
 	if (iop)
 		atomic_inc(&iop->read_count);
 
-	if (!ctx->bio || !is_contig || bio_full(ctx->bio)) {
+	if (!ctx->bio || !is_contig || bio_full(ctx->bio, plen)) {
 		gfp_t gfp = mapping_gfp_constraint(page->mapping, GFP_KERNEL);
 		int nr_vecs = (length + PAGE_SIZE - 1) >> PAGE_SHIFT;
 
@@ -355,7 +351,7 @@ iomap_readpage_actor(struct inode *inode, loff_t pos, loff_t length, void *data,
 		ctx->bio->bi_end_io = iomap_read_end_io;
 	}
 
-	__bio_add_page(ctx->bio, page, plen, poff);
+	bio_add_page(ctx->bio, page, plen, poff);
 done:
 	/*
 	 * Move the caller beyond our range so that it keeps making progress.
@@ -664,6 +660,7 @@ static int
 iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, unsigned flags,
 		struct page **pagep, struct iomap *iomap)
 {
+	const struct iomap_page_ops *page_ops = iomap->page_ops;
 	pgoff_t index = pos >> PAGE_SHIFT;
 	struct page *page;
 	int status = 0;
@@ -673,9 +670,17 @@ iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, unsigned flags,
 	if (fatal_signal_pending(current))
 		return -EINTR;
 
+	if (page_ops && page_ops->page_prepare) {
+		status = page_ops->page_prepare(inode, pos, len, iomap);
+		if (status)
+			return status;
+	}
+
 	page = grab_cache_page_write_begin(inode->i_mapping, index, flags);
-	if (!page)
-		return -ENOMEM;
+	if (!page) {
+		status = -ENOMEM;
+		goto out_no_page;
+	}
 
 	if (iomap->type == IOMAP_INLINE)
 		iomap_read_inline_data(inode, page, iomap);
@@ -683,15 +688,21 @@ iomap_write_begin(struct inode *inode, loff_t pos, unsigned len, unsigned flags,
 		status = __block_write_begin_int(page, pos, len, NULL, iomap);
 	else
 		status = __iomap_write_begin(inode, pos, len, page, iomap);
-	if (unlikely(status)) {
-		unlock_page(page);
-		put_page(page);
-		page = NULL;
 
-		iomap_write_failed(inode, pos, len);
-	}
+	if (unlikely(status))
+		goto out_unlock;
 
 	*pagep = page;
+	return 0;
+
+out_unlock:
+	unlock_page(page);
+	put_page(page);
+	iomap_write_failed(inode, pos, len);
+
+out_no_page:
+	if (page_ops && page_ops->page_done)
+		page_ops->page_done(inode, pos, 0, NULL, iomap);
 	return status;
 }
 
@@ -737,13 +748,11 @@ __iomap_write_end(struct inode *inode, loff_t pos, unsigned len,
 	 * uptodate page as a zero-length write, and force the caller to redo
 	 * the whole thing.
 	 */
-	if (unlikely(copied < len && !PageUptodate(page))) {
-		copied = 0;
-	} else {
-		iomap_set_range_uptodate(page, offset_in_page(pos), len);
-		iomap_set_page_dirty(page);
-	}
-	return __generic_write_end(inode, pos, copied, page);
+	if (unlikely(copied < len && !PageUptodate(page)))
+		return 0;
+	iomap_set_range_uptodate(page, offset_in_page(pos), len);
+	iomap_set_page_dirty(page);
+	return copied;
 }
 
 static int
@@ -760,7 +769,6 @@ iomap_write_end_inline(struct inode *inode, struct page *page,
 	kunmap_atomic(addr);
 
 	mark_inode_dirty(inode);
-	__generic_write_end(inode, pos, copied, page);
 	return copied;
 }
 
@@ -768,19 +776,35 @@ static int
 iomap_write_end(struct inode *inode, loff_t pos, unsigned len,
 		unsigned copied, struct page *page, struct iomap *iomap)
 {
+	const struct iomap_page_ops *page_ops = iomap->page_ops;
+	loff_t old_size = inode->i_size;
 	int ret;
 
 	if (iomap->type == IOMAP_INLINE) {
 		ret = iomap_write_end_inline(inode, page, iomap, pos, copied);
 	} else if (iomap->flags & IOMAP_F_BUFFER_HEAD) {
-		ret = generic_write_end(NULL, inode->i_mapping, pos, len,
-				copied, page, NULL);
+		ret = block_write_end(NULL, inode->i_mapping, pos, len, copied,
+				page, NULL);
 	} else {
 		ret = __iomap_write_end(inode, pos, len, copied, page, iomap);
 	}
 
-	if (iomap->page_done)
-		iomap->page_done(inode, pos, copied, page, iomap);
+	/*
+	 * Update the in-memory inode size after copying the data into the page
+	 * cache.  It's up to the file system to write the updated size to disk,
+	 * preferably after I/O completion so that no stale data is exposed.
+	 */
+	if (pos + ret > old_size) {
+		i_size_write(inode, pos + ret);
+		iomap->flags |= IOMAP_F_SIZE_CHANGED;
+	}
+	unlock_page(page);
+
+	if (old_size < pos)
+		pagecache_isize_extended(inode, old_size, pos);
+	if (page_ops && page_ops->page_done)
+		page_ops->page_done(inode, pos, ret, page, iomap);
+	put_page(page);
 
 	if (ret < len)
 		iomap_write_failed(inode, pos, len);
@@ -1463,6 +1487,28 @@ struct iomap_dio {
 	};
 };
 
+int iomap_dio_iopoll(struct kiocb *kiocb, bool spin)
+{
+	struct request_queue *q = READ_ONCE(kiocb->private);
+
+	if (!q)
+		return 0;
+	return blk_poll(q, READ_ONCE(kiocb->ki_cookie), spin);
+}
+EXPORT_SYMBOL_GPL(iomap_dio_iopoll);
+
+static void iomap_dio_submit_bio(struct iomap_dio *dio, struct iomap *iomap,
+		struct bio *bio)
+{
+	atomic_inc(&dio->ref);
+
+	if (dio->iocb->ki_flags & IOCB_HIPRI)
+		bio_set_polled(bio, dio->iocb);
+
+	dio->submit.last_queue = bdev_get_queue(iomap->bdev);
+	dio->submit.cookie = submit_bio(bio);
+}
+
 static ssize_t iomap_dio_complete(struct iomap_dio *dio)
 {
 	struct kiocb *iocb = dio->iocb;
@@ -1566,16 +1612,12 @@ static void iomap_dio_bio_end_io(struct bio *bio)
 	if (should_dirty) {
 		bio_check_pages_dirty(bio);
 	} else {
-		struct bio_vec *bvec;
-		int i;
-
-		bio_for_each_segment_all(bvec, bio, i)
-			put_page(bvec->bv_page);
+		bio_release_pages(bio, false);
 		bio_put(bio);
 	}
 }
 
-static blk_qc_t
+static void
 iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos,
 		unsigned len)
 {
@@ -1589,15 +1631,10 @@ iomap_dio_zero(struct iomap_dio *dio, struct iomap *iomap, loff_t pos,
 	bio->bi_private = dio;
 	bio->bi_end_io = iomap_dio_bio_end_io;
 
-	if (dio->iocb->ki_flags & IOCB_HIPRI)
-		flags |= REQ_HIPRI;
-
 	get_page(page);
 	__bio_add_page(bio, page, len, 0);
 	bio_set_op_attrs(bio, REQ_OP_WRITE, flags);
-
-	atomic_inc(&dio->ref);
-	return submit_bio(bio);
+	iomap_dio_submit_bio(dio, iomap, bio);
 }
 
 static loff_t
@@ -1700,9 +1737,6 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length,
 				bio_set_pages_dirty(bio);
 		}
 
-		if (dio->iocb->ki_flags & IOCB_HIPRI)
-			bio->bi_opf |= REQ_HIPRI;
-
 		iov_iter_advance(dio->submit.iter, n);
 
 		dio->size += n;
@@ -1710,11 +1744,7 @@ iomap_dio_bio_actor(struct inode *inode, loff_t pos, loff_t length,
 		copied += n;
 
 		nr_pages = iov_iter_npages(&iter, BIO_MAX_PAGES);
-
-		atomic_inc(&dio->ref);
-
-		dio->submit.last_queue = bdev_get_queue(iomap->bdev);
-		dio->submit.cookie = submit_bio(bio);
+		iomap_dio_submit_bio(dio, iomap, bio);
 	} while (nr_pages);
 
 	/*
@@ -1925,6 +1955,9 @@ iomap_dio_rw(struct kiocb *iocb, struct iov_iter *iter,
 	if (dio->flags & IOMAP_DIO_WRITE_FUA)
 		dio->flags &= ~IOMAP_DIO_NEED_SYNC;
 
+	WRITE_ONCE(iocb->ki_cookie, dio->submit.cookie);
+	WRITE_ONCE(iocb->private, dio->submit.last_queue);
+
 	/*
 	 * We are about to drop our additional submission reference, which
 	 * might be the last reference to the dio.  There are three three
diff --git a/fs/isofs/Kconfig b/fs/isofs/Kconfig
index 8ab9878e3671..5e7419599f50 100644
--- a/fs/isofs/Kconfig
+++ b/fs/isofs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config ISO9660_FS
 	tristate "ISO 9660 CDROM file system support"
 	help
diff --git a/fs/isofs/compress.c b/fs/isofs/compress.c
index 10205ececc27..bc12ac7e2312 100644
--- a/fs/isofs/compress.c
+++ b/fs/isofs/compress.c
@@ -1,13 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- linux-c -*- ------------------------------------------------------- *
  *   
  *   Copyright 2001 H. Peter Anvin - All Rights Reserved
  *
- *   This program is free software; you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
- *   USA; either version 2 of the License, or (at your option) any later
- *   version; incorporated herein by reference.
- *
  * ----------------------------------------------------------------------- */
 
 /*
diff --git a/fs/isofs/inode.c b/fs/isofs/inode.c
index 488a9e7f8f66..9e30d8703735 100644
--- a/fs/isofs/inode.c
+++ b/fs/isofs/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/isofs/inode.c
  *
@@ -72,17 +73,11 @@ static struct inode *isofs_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void isofs_i_callback(struct rcu_head *head)
+static void isofs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(isofs_inode_cachep, ISOFS_I(inode));
 }
 
-static void isofs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, isofs_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct iso_inode_info *ei = foo;
@@ -122,7 +117,7 @@ static int isofs_remount(struct super_block *sb, int *flags, char *data)
 
 static const struct super_operations isofs_sops = {
 	.alloc_inode	= isofs_alloc_inode,
-	.destroy_inode	= isofs_destroy_inode,
+	.free_inode	= isofs_free_inode,
 	.put_super	= isofs_put_super,
 	.statfs		= isofs_statfs,
 	.remount_fs	= isofs_remount,
diff --git a/fs/isofs/zisofs.h b/fs/isofs/zisofs.h
index 273795709155..70f1a218fc92 100644
--- a/fs/isofs/zisofs.h
+++ b/fs/isofs/zisofs.h
@@ -1,13 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* ----------------------------------------------------------------------- *
  *   
  *   Copyright 2001 H. Peter Anvin - All Rights Reserved
  *
- *   This program is free software; you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139,
- *   USA; either version 2 of the License, or (at your option) any later
- *   version; incorporated herein by reference.
- *
  * ----------------------------------------------------------------------- */
 
 /*
diff --git a/fs/jbd2/Kconfig b/fs/jbd2/Kconfig
index 5a9f5534d57b..4ad2c67f93f1 100644
--- a/fs/jbd2/Kconfig
+++ b/fs/jbd2/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config JBD2
 	tristate
 	select CRC32
diff --git a/fs/jbd2/Makefile b/fs/jbd2/Makefile
index 802a3413872a..126b4da6c7de 100644
--- a/fs/jbd2/Makefile
+++ b/fs/jbd2/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux journaling routines.
 #
diff --git a/fs/jbd2/checkpoint.c b/fs/jbd2/checkpoint.c
index 26f8d7e46462..a1909066bde6 100644
--- a/fs/jbd2/checkpoint.c
+++ b/fs/jbd2/checkpoint.c
@@ -113,7 +113,7 @@ void __jbd2_log_wait_for_space(journal_t *journal)
 	nblocks = jbd2_space_needed(journal);
 	while (jbd2_log_space_left(journal) < nblocks) {
 		write_unlock(&journal->j_state_lock);
-		mutex_lock(&journal->j_checkpoint_mutex);
+		mutex_lock_io(&journal->j_checkpoint_mutex);
 
 		/*
 		 * Test again, another process may have checkpointed while we
@@ -132,7 +132,6 @@ void __jbd2_log_wait_for_space(journal_t *journal)
 			return;
 		}
 		spin_lock(&journal->j_list_lock);
-		nblocks = jbd2_space_needed(journal);
 		space_left = jbd2_log_space_left(journal);
 		if (space_left < nblocks) {
 			int chkpt = journal->j_checkpoint_transactions != NULL;
@@ -276,9 +275,22 @@ restart:
 		"JBD2: %s: Waiting for Godot: block %llu\n",
 		journal->j_devname, (unsigned long long) bh->b_blocknr);
 
+			if (batch_count)
+				__flush_batch(journal, &batch_count);
 			jbd2_log_start_commit(journal, tid);
+			/*
+			 * jbd2_journal_commit_transaction() may want
+			 * to take the checkpoint_mutex if JBD2_FLUSHED
+			 * is set, jbd2_update_log_tail() called by
+			 * jbd2_journal_commit_transaction() may also take
+			 * checkpoint_mutex.  So we need to temporarily
+			 * drop it.
+			 */
+			mutex_unlock(&journal->j_checkpoint_mutex);
 			jbd2_log_wait_commit(journal, tid);
-			goto retry;
+			mutex_lock_io(&journal->j_checkpoint_mutex);
+			spin_lock(&journal->j_list_lock);
+			goto restart;
 		}
 		if (!buffer_dirty(bh)) {
 			if (unlikely(buffer_write_io_error(bh)) && !result)
diff --git a/fs/jbd2/commit.c b/fs/jbd2/commit.c
index 2eb55c3361a8..132fb92098c7 100644
--- a/fs/jbd2/commit.c
+++ b/fs/jbd2/commit.c
@@ -184,17 +184,18 @@ static int journal_wait_on_commit_record(journal_t *journal,
 /*
  * write the filemap data using writepage() address_space_operations.
  * We don't do block allocation here even for delalloc. We don't
- * use writepages() because with dealyed allocation we may be doing
+ * use writepages() because with delayed allocation we may be doing
  * block allocation in writepages().
  */
-static int journal_submit_inode_data_buffers(struct address_space *mapping)
+static int journal_submit_inode_data_buffers(struct address_space *mapping,
+		loff_t dirty_start, loff_t dirty_end)
 {
 	int ret;
 	struct writeback_control wbc = {
 		.sync_mode =  WB_SYNC_ALL,
 		.nr_to_write = mapping->nrpages * 2,
-		.range_start = 0,
-		.range_end = i_size_read(mapping->host),
+		.range_start = dirty_start,
+		.range_end = dirty_end,
 	};
 
 	ret = generic_writepages(mapping, &wbc);
@@ -218,6 +219,9 @@ static int journal_submit_data_buffers(journal_t *journal,
 
 	spin_lock(&journal->j_list_lock);
 	list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) {
+		loff_t dirty_start = jinode->i_dirty_start;
+		loff_t dirty_end = jinode->i_dirty_end;
+
 		if (!(jinode->i_flags & JI_WRITE_DATA))
 			continue;
 		mapping = jinode->i_vfs_inode->i_mapping;
@@ -230,7 +234,8 @@ static int journal_submit_data_buffers(journal_t *journal,
 		 * only allocated blocks here.
 		 */
 		trace_jbd2_submit_inode_data(jinode->i_vfs_inode);
-		err = journal_submit_inode_data_buffers(mapping);
+		err = journal_submit_inode_data_buffers(mapping, dirty_start,
+				dirty_end);
 		if (!ret)
 			ret = err;
 		spin_lock(&journal->j_list_lock);
@@ -257,12 +262,16 @@ static int journal_finish_inode_data_buffers(journal_t *journal,
 	/* For locking, see the comment in journal_submit_data_buffers() */
 	spin_lock(&journal->j_list_lock);
 	list_for_each_entry(jinode, &commit_transaction->t_inode_list, i_list) {
+		loff_t dirty_start = jinode->i_dirty_start;
+		loff_t dirty_end = jinode->i_dirty_end;
+
 		if (!(jinode->i_flags & JI_WAIT_DATA))
 			continue;
 		jinode->i_flags |= JI_COMMIT_RUNNING;
 		spin_unlock(&journal->j_list_lock);
-		err = filemap_fdatawait_keep_errors(
-				jinode->i_vfs_inode->i_mapping);
+		err = filemap_fdatawait_range_keep_errors(
+				jinode->i_vfs_inode->i_mapping, dirty_start,
+				dirty_end);
 		if (!ret)
 			ret = err;
 		spin_lock(&journal->j_list_lock);
@@ -282,6 +291,8 @@ static int journal_finish_inode_data_buffers(journal_t *journal,
 				&jinode->i_transaction->t_inode_list);
 		} else {
 			jinode->i_transaction = NULL;
+			jinode->i_dirty_start = 0;
+			jinode->i_dirty_end = 0;
 		}
 	}
 	spin_unlock(&journal->j_list_lock);
@@ -694,9 +705,11 @@ void jbd2_journal_commit_transaction(journal_t *journal)
                            the last tag we set up. */
 
 			tag->t_flags |= cpu_to_be16(JBD2_FLAG_LAST_TAG);
-
-			jbd2_descriptor_block_csum_set(journal, descriptor);
 start_journal_io:
+			if (descriptor)
+				jbd2_descriptor_block_csum_set(journal,
+							descriptor);
+
 			for (i = 0; i < bufs; i++) {
 				struct buffer_head *bh = wbuf[i];
 				/*
diff --git a/fs/jbd2/journal.c b/fs/jbd2/journal.c
index 8ef6b6daaa7a..953990eb70a9 100644
--- a/fs/jbd2/journal.c
+++ b/fs/jbd2/journal.c
@@ -66,9 +66,6 @@ EXPORT_SYMBOL(jbd2_journal_get_undo_access);
 EXPORT_SYMBOL(jbd2_journal_set_triggers);
 EXPORT_SYMBOL(jbd2_journal_dirty_metadata);
 EXPORT_SYMBOL(jbd2_journal_forget);
-#if 0
-EXPORT_SYMBOL(journal_sync_buffer);
-#endif
 EXPORT_SYMBOL(jbd2_journal_flush);
 EXPORT_SYMBOL(jbd2_journal_revoke);
 
@@ -94,6 +91,8 @@ EXPORT_SYMBOL(jbd2_journal_try_to_free_buffers);
 EXPORT_SYMBOL(jbd2_journal_force_commit);
 EXPORT_SYMBOL(jbd2_journal_inode_add_write);
 EXPORT_SYMBOL(jbd2_journal_inode_add_wait);
+EXPORT_SYMBOL(jbd2_journal_inode_ranged_write);
+EXPORT_SYMBOL(jbd2_journal_inode_ranged_wait);
 EXPORT_SYMBOL(jbd2_journal_init_jbd_inode);
 EXPORT_SYMBOL(jbd2_journal_release_jbd_inode);
 EXPORT_SYMBOL(jbd2_journal_begin_ordered_truncate);
@@ -142,22 +141,6 @@ static __be32 jbd2_superblock_csum(journal_t *j, journal_superblock_t *sb)
 	return cpu_to_be32(csum);
 }
 
-static int jbd2_superblock_csum_verify(journal_t *j, journal_superblock_t *sb)
-{
-	if (!jbd2_journal_has_csum_v2or3(j))
-		return 1;
-
-	return sb->s_checksum == jbd2_superblock_csum(j, sb);
-}
-
-static void jbd2_superblock_csum_set(journal_t *j, journal_superblock_t *sb)
-{
-	if (!jbd2_journal_has_csum_v2or3(j))
-		return;
-
-	sb->s_checksum = jbd2_superblock_csum(j, sb);
-}
-
 /*
  * Helper function used to manage commit timeouts
  */
@@ -219,7 +202,7 @@ loop:
 	if (journal->j_flags & JBD2_UNMOUNT)
 		goto end_loop;
 
-	jbd_debug(1, "commit_sequence=%d, commit_request=%d\n",
+	jbd_debug(1, "commit_sequence=%u, commit_request=%u\n",
 		journal->j_commit_sequence, journal->j_commit_request);
 
 	if (journal->j_commit_sequence != journal->j_commit_request) {
@@ -340,7 +323,7 @@ static void journal_kill_thread(journal_t *journal)
  * IO is in progress. do_get_write_access() handles this.
  *
  * The function returns a pointer to the buffer_head to be used for IO.
- * 
+ *
  *
  * Return value:
  *  <0: Error
@@ -516,7 +499,7 @@ int __jbd2_log_start_commit(journal_t *journal, tid_t target)
 		 */
 
 		journal->j_commit_request = target;
-		jbd_debug(1, "JBD2: requesting commit %d/%d\n",
+		jbd_debug(1, "JBD2: requesting commit %u/%u\n",
 			  journal->j_commit_request,
 			  journal->j_commit_sequence);
 		journal->j_running_transaction->t_requested = jiffies;
@@ -529,7 +512,7 @@ int __jbd2_log_start_commit(journal_t *journal, tid_t target)
 		WARN_ONCE(1, "JBD2: bad log_start_commit: %u %u %u %u\n",
 			  journal->j_commit_request,
 			  journal->j_commit_sequence,
-			  target, journal->j_running_transaction ? 
+			  target, journal->j_running_transaction ?
 			  journal->j_running_transaction->t_tid : 0);
 	return 0;
 }
@@ -714,12 +697,12 @@ int jbd2_log_wait_commit(journal_t *journal, tid_t tid)
 #ifdef CONFIG_JBD2_DEBUG
 	if (!tid_geq(journal->j_commit_request, tid)) {
 		printk(KERN_ERR
-		       "%s: error: j_commit_request=%d, tid=%d\n",
+		       "%s: error: j_commit_request=%u, tid=%u\n",
 		       __func__, journal->j_commit_request, tid);
 	}
 #endif
 	while (tid_gt(tid, journal->j_commit_sequence)) {
-		jbd_debug(1, "JBD2: want %d, j_commit_sequence=%d\n",
+		jbd_debug(1, "JBD2: want %u, j_commit_sequence=%u\n",
 				  tid, journal->j_commit_sequence);
 		read_unlock(&journal->j_state_lock);
 		wake_up(&journal->j_wait_commit);
@@ -960,7 +943,7 @@ int __jbd2_update_log_tail(journal_t *journal, tid_t tid, unsigned long block)
 
 	trace_jbd2_update_log_tail(journal, tid, block, freed);
 	jbd_debug(1,
-		  "Cleaning journal tail from %d to %d (offset %lu), "
+		  "Cleaning journal tail from %u to %u (offset %lu), "
 		  "freeing %lu\n",
 		  journal->j_tail_sequence, tid, block, freed);
 
@@ -1334,7 +1317,7 @@ static int journal_reset(journal_t *journal)
 	 */
 	if (sb->s_start == 0) {
 		jbd_debug(1, "JBD2: Skipping superblock update on recovered sb "
-			"(start %ld, seq %d, errno %d)\n",
+			"(start %ld, seq %u, errno %d)\n",
 			journal->j_tail, journal->j_tail_sequence,
 			journal->j_errno);
 		journal->j_flags |= JBD2_FLUSHED;
@@ -1356,16 +1339,23 @@ static int journal_reset(journal_t *journal)
 	return jbd2_journal_start_thread(journal);
 }
 
+/*
+ * This function expects that the caller will have locked the journal
+ * buffer head, and will return with it unlocked
+ */
 static int jbd2_write_superblock(journal_t *journal, int write_flags)
 {
 	struct buffer_head *bh = journal->j_sb_buffer;
 	journal_superblock_t *sb = journal->j_superblock;
 	int ret;
 
+	/* Buffer got discarded which means block device got invalidated */
+	if (!buffer_mapped(bh))
+		return -EIO;
+
 	trace_jbd2_write_superblock(journal, write_flags);
 	if (!(journal->j_flags & JBD2_BARRIER))
 		write_flags &= ~(REQ_FUA | REQ_PREFLUSH);
-	lock_buffer(bh);
 	if (buffer_write_io_error(bh)) {
 		/*
 		 * Oh, dear.  A previous attempt to write the journal
@@ -1381,7 +1371,8 @@ static int jbd2_write_superblock(journal_t *journal, int write_flags)
 		clear_buffer_write_io_error(bh);
 		set_buffer_uptodate(bh);
 	}
-	jbd2_superblock_csum_set(journal, sb);
+	if (jbd2_journal_has_csum_v2or3(journal))
+		sb->s_checksum = jbd2_superblock_csum(journal, sb);
 	get_bh(bh);
 	bh->b_end_io = end_buffer_write_sync;
 	ret = submit_bh(REQ_OP_WRITE, write_flags, bh);
@@ -1424,6 +1415,7 @@ int jbd2_journal_update_sb_log_tail(journal_t *journal, tid_t tail_tid,
 	jbd_debug(1, "JBD2: updating superblock (start %lu, seq %u)\n",
 		  tail_block, tail_tid);
 
+	lock_buffer(journal->j_sb_buffer);
 	sb->s_sequence = cpu_to_be32(tail_tid);
 	sb->s_start    = cpu_to_be32(tail_block);
 
@@ -1454,18 +1446,17 @@ static void jbd2_mark_journal_empty(journal_t *journal, int write_op)
 	journal_superblock_t *sb = journal->j_superblock;
 
 	BUG_ON(!mutex_is_locked(&journal->j_checkpoint_mutex));
-	read_lock(&journal->j_state_lock);
-	/* Is it already empty? */
-	if (sb->s_start == 0) {
-		read_unlock(&journal->j_state_lock);
+	lock_buffer(journal->j_sb_buffer);
+	if (sb->s_start == 0) {		/* Is it already empty? */
+		unlock_buffer(journal->j_sb_buffer);
 		return;
 	}
-	jbd_debug(1, "JBD2: Marking journal as empty (seq %d)\n",
+
+	jbd_debug(1, "JBD2: Marking journal as empty (seq %u)\n",
 		  journal->j_tail_sequence);
 
 	sb->s_sequence = cpu_to_be32(journal->j_tail_sequence);
 	sb->s_start    = cpu_to_be32(0);
-	read_unlock(&journal->j_state_lock);
 
 	jbd2_write_superblock(journal, write_op);
 
@@ -1488,9 +1479,8 @@ void jbd2_journal_update_sb_errno(journal_t *journal)
 	journal_superblock_t *sb = journal->j_superblock;
 	int errcode;
 
-	read_lock(&journal->j_state_lock);
+	lock_buffer(journal->j_sb_buffer);
 	errcode = journal->j_errno;
-	read_unlock(&journal->j_state_lock);
 	if (errcode == -ESHUTDOWN)
 		errcode = 0;
 	jbd_debug(1, "JBD2: updating superblock error (errno %d)\n", errcode);
@@ -1595,17 +1585,18 @@ static int journal_get_superblock(journal_t *journal)
 		}
 	}
 
-	/* Check superblock checksum */
-	if (!jbd2_superblock_csum_verify(journal, sb)) {
-		printk(KERN_ERR "JBD2: journal checksum error\n");
-		err = -EFSBADCRC;
-		goto out;
-	}
+	if (jbd2_journal_has_csum_v2or3(journal)) {
+		/* Check superblock checksum */
+		if (sb->s_checksum != jbd2_superblock_csum(journal, sb)) {
+			printk(KERN_ERR "JBD2: journal checksum error\n");
+			err = -EFSBADCRC;
+			goto out;
+		}
 
-	/* Precompute checksum seed for all metadata */
-	if (jbd2_journal_has_csum_v2or3(journal))
+		/* Precompute checksum seed for all metadata */
 		journal->j_csum_seed = jbd2_chksum(journal, ~0, sb->s_uuid,
 						   sizeof(sb->s_uuid));
+	}
 
 	set_buffer_verified(bh);
 
@@ -1894,28 +1885,27 @@ int jbd2_journal_set_features (journal_t *journal, unsigned long compat,
 
 	sb = journal->j_superblock;
 
+	/* Load the checksum driver if necessary */
+	if ((journal->j_chksum_driver == NULL) &&
+	    INCOMPAT_FEATURE_ON(JBD2_FEATURE_INCOMPAT_CSUM_V3)) {
+		journal->j_chksum_driver = crypto_alloc_shash("crc32c", 0, 0);
+		if (IS_ERR(journal->j_chksum_driver)) {
+			printk(KERN_ERR "JBD2: Cannot load crc32c driver.\n");
+			journal->j_chksum_driver = NULL;
+			return 0;
+		}
+		/* Precompute checksum seed for all metadata */
+		journal->j_csum_seed = jbd2_chksum(journal, ~0, sb->s_uuid,
+						   sizeof(sb->s_uuid));
+	}
+
+	lock_buffer(journal->j_sb_buffer);
+
 	/* If enabling v3 checksums, update superblock */
 	if (INCOMPAT_FEATURE_ON(JBD2_FEATURE_INCOMPAT_CSUM_V3)) {
 		sb->s_checksum_type = JBD2_CRC32C_CHKSUM;
 		sb->s_feature_compat &=
 			~cpu_to_be32(JBD2_FEATURE_COMPAT_CHECKSUM);
-
-		/* Load the checksum driver */
-		if (journal->j_chksum_driver == NULL) {
-			journal->j_chksum_driver = crypto_alloc_shash("crc32c",
-								      0, 0);
-			if (IS_ERR(journal->j_chksum_driver)) {
-				printk(KERN_ERR "JBD2: Cannot load crc32c "
-				       "driver.\n");
-				journal->j_chksum_driver = NULL;
-				return 0;
-			}
-
-			/* Precompute checksum seed for all metadata */
-			journal->j_csum_seed = jbd2_chksum(journal, ~0,
-							   sb->s_uuid,
-							   sizeof(sb->s_uuid));
-		}
 	}
 
 	/* If enabling v1 checksums, downgrade superblock */
@@ -1927,6 +1917,7 @@ int jbd2_journal_set_features (journal_t *journal, unsigned long compat,
 	sb->s_feature_compat    |= cpu_to_be32(compat);
 	sb->s_feature_ro_compat |= cpu_to_be32(ro);
 	sb->s_feature_incompat  |= cpu_to_be32(incompat);
+	unlock_buffer(journal->j_sb_buffer);
 
 	return 1;
 #undef COMPAT_FEATURE_ON
@@ -2067,7 +2058,7 @@ int jbd2_journal_wipe(journal_t *journal, int write)
 	err = jbd2_journal_skip_recovery(journal);
 	if (write) {
 		/* Lock to make assertions happy... */
-		mutex_lock(&journal->j_checkpoint_mutex);
+		mutex_lock_io(&journal->j_checkpoint_mutex);
 		jbd2_mark_journal_empty(journal, REQ_SYNC | REQ_FUA);
 		mutex_unlock(&journal->j_checkpoint_mutex);
 	}
@@ -2383,22 +2374,19 @@ static struct kmem_cache *jbd2_journal_head_cache;
 static atomic_t nr_journal_heads = ATOMIC_INIT(0);
 #endif
 
-static int jbd2_journal_init_journal_head_cache(void)
+static int __init jbd2_journal_init_journal_head_cache(void)
 {
-	int retval;
-
-	J_ASSERT(jbd2_journal_head_cache == NULL);
+	J_ASSERT(!jbd2_journal_head_cache);
 	jbd2_journal_head_cache = kmem_cache_create("jbd2_journal_head",
 				sizeof(struct journal_head),
 				0,		/* offset */
 				SLAB_TEMPORARY | SLAB_TYPESAFE_BY_RCU,
 				NULL);		/* ctor */
-	retval = 0;
 	if (!jbd2_journal_head_cache) {
-		retval = -ENOMEM;
 		printk(KERN_EMERG "JBD2: no memory for journal_head cache\n");
+		return -ENOMEM;
 	}
-	return retval;
+	return 0;
 }
 
 static void jbd2_journal_destroy_journal_head_cache(void)
@@ -2585,6 +2573,8 @@ void jbd2_journal_init_jbd_inode(struct jbd2_inode *jinode, struct inode *inode)
 	jinode->i_next_transaction = NULL;
 	jinode->i_vfs_inode = inode;
 	jinode->i_flags = 0;
+	jinode->i_dirty_start = 0;
+	jinode->i_dirty_end = 0;
 	INIT_LIST_HEAD(&jinode->i_list);
 }
 
@@ -2644,28 +2634,38 @@ static void __exit jbd2_remove_jbd_stats_proc_entry(void)
 
 struct kmem_cache *jbd2_handle_cache, *jbd2_inode_cache;
 
+static int __init jbd2_journal_init_inode_cache(void)
+{
+	J_ASSERT(!jbd2_inode_cache);
+	jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0);
+	if (!jbd2_inode_cache) {
+		pr_emerg("JBD2: failed to create inode cache\n");
+		return -ENOMEM;
+	}
+	return 0;
+}
+
 static int __init jbd2_journal_init_handle_cache(void)
 {
+	J_ASSERT(!jbd2_handle_cache);
 	jbd2_handle_cache = KMEM_CACHE(jbd2_journal_handle, SLAB_TEMPORARY);
-	if (jbd2_handle_cache == NULL) {
+	if (!jbd2_handle_cache) {
 		printk(KERN_EMERG "JBD2: failed to create handle cache\n");
 		return -ENOMEM;
 	}
-	jbd2_inode_cache = KMEM_CACHE(jbd2_inode, 0);
-	if (jbd2_inode_cache == NULL) {
-		printk(KERN_EMERG "JBD2: failed to create inode cache\n");
-		kmem_cache_destroy(jbd2_handle_cache);
-		return -ENOMEM;
-	}
 	return 0;
 }
 
+static void jbd2_journal_destroy_inode_cache(void)
+{
+	kmem_cache_destroy(jbd2_inode_cache);
+	jbd2_inode_cache = NULL;
+}
+
 static void jbd2_journal_destroy_handle_cache(void)
 {
 	kmem_cache_destroy(jbd2_handle_cache);
 	jbd2_handle_cache = NULL;
-	kmem_cache_destroy(jbd2_inode_cache);
-	jbd2_inode_cache = NULL;
 }
 
 /*
@@ -2676,21 +2676,27 @@ static int __init journal_init_caches(void)
 {
 	int ret;
 
-	ret = jbd2_journal_init_revoke_caches();
+	ret = jbd2_journal_init_revoke_record_cache();
+	if (ret == 0)
+		ret = jbd2_journal_init_revoke_table_cache();
 	if (ret == 0)
 		ret = jbd2_journal_init_journal_head_cache();
 	if (ret == 0)
 		ret = jbd2_journal_init_handle_cache();
 	if (ret == 0)
+		ret = jbd2_journal_init_inode_cache();
+	if (ret == 0)
 		ret = jbd2_journal_init_transaction_cache();
 	return ret;
 }
 
 static void jbd2_journal_destroy_caches(void)
 {
-	jbd2_journal_destroy_revoke_caches();
+	jbd2_journal_destroy_revoke_record_cache();
+	jbd2_journal_destroy_revoke_table_cache();
 	jbd2_journal_destroy_journal_head_cache();
 	jbd2_journal_destroy_handle_cache();
+	jbd2_journal_destroy_inode_cache();
 	jbd2_journal_destroy_transaction_cache();
 	jbd2_journal_destroy_slabs();
 }
diff --git a/fs/jbd2/revoke.c b/fs/jbd2/revoke.c
index a1143e57a718..69b9bc329964 100644
--- a/fs/jbd2/revoke.c
+++ b/fs/jbd2/revoke.c
@@ -178,33 +178,41 @@ static struct jbd2_revoke_record_s *find_revoke_record(journal_t *journal,
 	return NULL;
 }
 
-void jbd2_journal_destroy_revoke_caches(void)
+void jbd2_journal_destroy_revoke_record_cache(void)
 {
 	kmem_cache_destroy(jbd2_revoke_record_cache);
 	jbd2_revoke_record_cache = NULL;
+}
+
+void jbd2_journal_destroy_revoke_table_cache(void)
+{
 	kmem_cache_destroy(jbd2_revoke_table_cache);
 	jbd2_revoke_table_cache = NULL;
 }
 
-int __init jbd2_journal_init_revoke_caches(void)
+int __init jbd2_journal_init_revoke_record_cache(void)
 {
 	J_ASSERT(!jbd2_revoke_record_cache);
-	J_ASSERT(!jbd2_revoke_table_cache);
-
 	jbd2_revoke_record_cache = KMEM_CACHE(jbd2_revoke_record_s,
 					SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY);
-	if (!jbd2_revoke_record_cache)
-		goto record_cache_failure;
 
+	if (!jbd2_revoke_record_cache) {
+		pr_emerg("JBD2: failed to create revoke_record cache\n");
+		return -ENOMEM;
+	}
+	return 0;
+}
+
+int __init jbd2_journal_init_revoke_table_cache(void)
+{
+	J_ASSERT(!jbd2_revoke_table_cache);
 	jbd2_revoke_table_cache = KMEM_CACHE(jbd2_revoke_table_s,
 					     SLAB_TEMPORARY);
-	if (!jbd2_revoke_table_cache)
-		goto table_cache_failure;
-	return 0;
-table_cache_failure:
-	jbd2_journal_destroy_revoke_caches();
-record_cache_failure:
+	if (!jbd2_revoke_table_cache) {
+		pr_emerg("JBD2: failed to create revoke_table cache\n");
 		return -ENOMEM;
+	}
+	return 0;
 }
 
 static struct jbd2_revoke_table_s *jbd2_journal_init_revoke_table(int hash_size)
diff --git a/fs/jbd2/transaction.c b/fs/jbd2/transaction.c
index cc35537232f2..990e7b5062e7 100644
--- a/fs/jbd2/transaction.c
+++ b/fs/jbd2/transaction.c
@@ -42,9 +42,11 @@ int __init jbd2_journal_init_transaction_cache(void)
 					0,
 					SLAB_HWCACHE_ALIGN|SLAB_TEMPORARY,
 					NULL);
-	if (transaction_cache)
-		return 0;
-	return -ENOMEM;
+	if (!transaction_cache) {
+		pr_emerg("JBD2: failed to create transaction cache\n");
+		return -ENOMEM;
+	}
+	return 0;
 }
 
 void jbd2_journal_destroy_transaction_cache(void)
@@ -63,7 +65,7 @@ void jbd2_journal_free_transaction(transaction_t *transaction)
 /*
  * jbd2_get_transaction: obtain a new transaction_t object.
  *
- * Simply allocate and initialise a new transaction.  Create it in
+ * Simply initialise a new transaction. Initialize it in
  * RUNNING state and add it to the current journal (which should not
  * have an existing running transaction: we only make a new transaction
  * once we have started to commit the old one).
@@ -75,8 +77,8 @@ void jbd2_journal_free_transaction(transaction_t *transaction)
  *
  */
 
-static transaction_t *
-jbd2_get_transaction(journal_t *journal, transaction_t *transaction)
+static void jbd2_get_transaction(journal_t *journal,
+				transaction_t *transaction)
 {
 	transaction->t_journal = journal;
 	transaction->t_state = T_RUNNING;
@@ -100,8 +102,6 @@ jbd2_get_transaction(journal_t *journal, transaction_t *transaction)
 	transaction->t_max_wait = 0;
 	transaction->t_start = jiffies;
 	transaction->t_requested = 0;
-
-	return transaction;
 }
 
 /*
@@ -1252,11 +1252,12 @@ int jbd2_journal_get_undo_access(handle_t *handle, struct buffer_head *bh)
 	struct journal_head *jh;
 	char *committed_data = NULL;
 
-	JBUFFER_TRACE(jh, "entry");
 	if (jbd2_write_access_granted(handle, bh, true))
 		return 0;
 
 	jh = jbd2_journal_add_journal_head(bh);
+	JBUFFER_TRACE(jh, "entry");
+
 	/*
 	 * Do this first --- it can drop the journal lock, so we want to
 	 * make sure that obtaining the committed_data is done
@@ -1367,15 +1368,17 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
 
 	if (is_handle_aborted(handle))
 		return -EROFS;
-	if (!buffer_jbd(bh)) {
-		ret = -EUCLEAN;
-		goto out;
-	}
+	if (!buffer_jbd(bh))
+		return -EUCLEAN;
+
 	/*
 	 * We don't grab jh reference here since the buffer must be part
 	 * of the running transaction.
 	 */
 	jh = bh2jh(bh);
+	jbd_debug(5, "journal_head %p\n", jh);
+	JBUFFER_TRACE(jh, "entry");
+
 	/*
 	 * This and the following assertions are unreliable since we may see jh
 	 * in inconsistent state unless we grab bh_state lock. But this is
@@ -1409,9 +1412,6 @@ int jbd2_journal_dirty_metadata(handle_t *handle, struct buffer_head *bh)
 	}
 
 	journal = transaction->t_journal;
-	jbd_debug(5, "journal_head %p\n", jh);
-	JBUFFER_TRACE(jh, "entry");
-
 	jbd_lock_bh_state(bh);
 
 	if (jh->b_modified == 0) {
@@ -1597,9 +1597,7 @@ int jbd2_journal_forget (handle_t *handle, struct buffer_head *bh)
 			__jbd2_journal_unfile_buffer(jh);
 			if (!buffer_jbd(bh)) {
 				spin_unlock(&journal->j_list_lock);
-				jbd_unlock_bh_state(bh);
-				__bforget(bh);
-				goto drop;
+				goto not_jbd;
 			}
 		}
 		spin_unlock(&journal->j_list_lock);
@@ -1609,14 +1607,21 @@ int jbd2_journal_forget (handle_t *handle, struct buffer_head *bh)
 		/* However, if the buffer is still owned by a prior
 		 * (committing) transaction, we can't drop it yet... */
 		JBUFFER_TRACE(jh, "belongs to older transaction");
-		/* ... but we CAN drop it from the new transaction if we
-		 * have also modified it since the original commit. */
+		/* ... but we CAN drop it from the new transaction through
+		 * marking the buffer as freed and set j_next_transaction to
+		 * the new transaction, so that not only the commit code
+		 * knows it should clear dirty bits when it is done with the
+		 * buffer, but also the buffer can be checkpointed only
+		 * after the new transaction commits. */
 
-		if (jh->b_next_transaction) {
-			J_ASSERT(jh->b_next_transaction == transaction);
+		set_buffer_freed(bh);
+
+		if (!jh->b_next_transaction) {
 			spin_lock(&journal->j_list_lock);
-			jh->b_next_transaction = NULL;
+			jh->b_next_transaction = transaction;
 			spin_unlock(&journal->j_list_lock);
+		} else {
+			J_ASSERT(jh->b_next_transaction == transaction);
 
 			/*
 			 * only drop a reference if this transaction modified
@@ -1625,9 +1630,40 @@ int jbd2_journal_forget (handle_t *handle, struct buffer_head *bh)
 			if (was_modified)
 				drop_reserve = 1;
 		}
+	} else {
+		/*
+		 * Finally, if the buffer is not belongs to any
+		 * transaction, we can just drop it now if it has no
+		 * checkpoint.
+		 */
+		spin_lock(&journal->j_list_lock);
+		if (!jh->b_cp_transaction) {
+			JBUFFER_TRACE(jh, "belongs to none transaction");
+			spin_unlock(&journal->j_list_lock);
+			goto not_jbd;
+		}
+
+		/*
+		 * Otherwise, if the buffer has been written to disk,
+		 * it is safe to remove the checkpoint and drop it.
+		 */
+		if (!buffer_dirty(bh)) {
+			__jbd2_journal_remove_checkpoint(jh);
+			spin_unlock(&journal->j_list_lock);
+			goto not_jbd;
+		}
+
+		/*
+		 * The buffer is still not written to disk, we should
+		 * attach this buffer to current transaction so that the
+		 * buffer can be checkpointed only after the current
+		 * transaction commits.
+		 */
+		clear_buffer_dirty(bh);
+		__jbd2_journal_file_buffer(jh, transaction, BJ_Forget);
+		spin_unlock(&journal->j_list_lock);
 	}
 
-not_jbd:
 	jbd_unlock_bh_state(bh);
 	__brelse(bh);
 drop:
@@ -1636,6 +1672,11 @@ drop:
 		handle->h_buffer_credits++;
 	}
 	return err;
+
+not_jbd:
+	jbd_unlock_bh_state(bh);
+	__bforget(bh);
+	goto drop;
 }
 
 /**
@@ -2524,7 +2565,7 @@ void jbd2_journal_refile_buffer(journal_t *journal, struct journal_head *jh)
  * File inode in the inode list of the handle's transaction
  */
 static int jbd2_journal_file_inode(handle_t *handle, struct jbd2_inode *jinode,
-				   unsigned long flags)
+		unsigned long flags, loff_t start_byte, loff_t end_byte)
 {
 	transaction_t *transaction = handle->h_transaction;
 	journal_t *journal;
@@ -2536,26 +2577,17 @@ static int jbd2_journal_file_inode(handle_t *handle, struct jbd2_inode *jinode,
 	jbd_debug(4, "Adding inode %lu, tid:%d\n", jinode->i_vfs_inode->i_ino,
 			transaction->t_tid);
 
-	/*
-	 * First check whether inode isn't already on the transaction's
-	 * lists without taking the lock. Note that this check is safe
-	 * without the lock as we cannot race with somebody removing inode
-	 * from the transaction. The reason is that we remove inode from the
-	 * transaction only in journal_release_jbd_inode() and when we commit
-	 * the transaction. We are guarded from the first case by holding
-	 * a reference to the inode. We are safe against the second case
-	 * because if jinode->i_transaction == transaction, commit code
-	 * cannot touch the transaction because we hold reference to it,
-	 * and if jinode->i_next_transaction == transaction, commit code
-	 * will only file the inode where we want it.
-	 */
-	if ((jinode->i_transaction == transaction ||
-	    jinode->i_next_transaction == transaction) &&
-	    (jinode->i_flags & flags) == flags)
-		return 0;
-
 	spin_lock(&journal->j_list_lock);
 	jinode->i_flags |= flags;
+
+	if (jinode->i_dirty_end) {
+		jinode->i_dirty_start = min(jinode->i_dirty_start, start_byte);
+		jinode->i_dirty_end = max(jinode->i_dirty_end, end_byte);
+	} else {
+		jinode->i_dirty_start = start_byte;
+		jinode->i_dirty_end = end_byte;
+	}
+
 	/* Is inode already attached where we need it? */
 	if (jinode->i_transaction == transaction ||
 	    jinode->i_next_transaction == transaction)
@@ -2590,12 +2622,28 @@ done:
 int jbd2_journal_inode_add_write(handle_t *handle, struct jbd2_inode *jinode)
 {
 	return jbd2_journal_file_inode(handle, jinode,
-				       JI_WRITE_DATA | JI_WAIT_DATA);
+			JI_WRITE_DATA | JI_WAIT_DATA, 0, LLONG_MAX);
 }
 
 int jbd2_journal_inode_add_wait(handle_t *handle, struct jbd2_inode *jinode)
 {
-	return jbd2_journal_file_inode(handle, jinode, JI_WAIT_DATA);
+	return jbd2_journal_file_inode(handle, jinode, JI_WAIT_DATA, 0,
+			LLONG_MAX);
+}
+
+int jbd2_journal_inode_ranged_write(handle_t *handle,
+		struct jbd2_inode *jinode, loff_t start_byte, loff_t length)
+{
+	return jbd2_journal_file_inode(handle, jinode,
+			JI_WRITE_DATA | JI_WAIT_DATA, start_byte,
+			start_byte + length - 1);
+}
+
+int jbd2_journal_inode_ranged_wait(handle_t *handle, struct jbd2_inode *jinode,
+		loff_t start_byte, loff_t length)
+{
+	return jbd2_journal_file_inode(handle, jinode, JI_WAIT_DATA,
+			start_byte, start_byte + length - 1);
 }
 
 /*
diff --git a/fs/jffs2/Kconfig b/fs/jffs2/Kconfig
index ad850c5bf2ca..7c96bc107218 100644
--- a/fs/jffs2/Kconfig
+++ b/fs/jffs2/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config JFFS2_FS
 	tristate "Journalling Flash File System v2 (JFFS2) support"
 	select CRC32
diff --git a/fs/jffs2/file.c b/fs/jffs2/file.c
index 7d8654a1472e..f8fb89b10227 100644
--- a/fs/jffs2/file.c
+++ b/fs/jffs2/file.c
@@ -109,9 +109,9 @@ static int jffs2_do_readpage_nolock (struct inode *inode, struct page *pg)
 	return ret;
 }
 
-int jffs2_do_readpage_unlock(struct inode *inode, struct page *pg)
+int jffs2_do_readpage_unlock(void *data, struct page *pg)
 {
-	int ret = jffs2_do_readpage_nolock(inode, pg);
+	int ret = jffs2_do_readpage_nolock(data, pg);
 	unlock_page(pg);
 	return ret;
 }
diff --git a/fs/jffs2/fs.c b/fs/jffs2/fs.c
index eab04eca95a3..8a20ddd25f2d 100644
--- a/fs/jffs2/fs.c
+++ b/fs/jffs2/fs.c
@@ -340,6 +340,7 @@ struct inode *jffs2_iget(struct super_block *sb, unsigned long ino)
 			rdev = old_decode_dev(je16_to_cpu(jdev.old_id));
 		else
 			rdev = new_decode_dev(je32_to_cpu(jdev.new_id));
+		/* fall through */
 
 	case S_IFSOCK:
 	case S_IFIFO:
@@ -686,7 +687,7 @@ unsigned char *jffs2_gc_fetch_page(struct jffs2_sb_info *c,
 	struct page *pg;
 
 	pg = read_cache_page(inode->i_mapping, offset >> PAGE_SHIFT,
-			     (void *)jffs2_do_readpage_unlock, inode);
+			     jffs2_do_readpage_unlock, inode);
 	if (IS_ERR(pg))
 		return (void *)pg;
 
diff --git a/fs/jffs2/os-linux.h b/fs/jffs2/os-linux.h
index a2dbbb3f4c74..bd3d5f0ddc34 100644
--- a/fs/jffs2/os-linux.h
+++ b/fs/jffs2/os-linux.h
@@ -155,7 +155,7 @@ extern const struct file_operations jffs2_file_operations;
 extern const struct inode_operations jffs2_file_inode_operations;
 extern const struct address_space_operations jffs2_file_address_operations;
 int jffs2_fsync(struct file *, loff_t, loff_t, int);
-int jffs2_do_readpage_unlock (struct inode *inode, struct page *pg);
+int jffs2_do_readpage_unlock(void *data, struct page *pg);
 
 /* ioctl.c */
 long jffs2_ioctl(struct file *, unsigned int, unsigned long);
diff --git a/fs/jffs2/readinode.c b/fs/jffs2/readinode.c
index 389ea53ea487..bccfc40b3a74 100644
--- a/fs/jffs2/readinode.c
+++ b/fs/jffs2/readinode.c
@@ -1414,11 +1414,6 @@ void jffs2_do_clear_inode(struct jffs2_sb_info *c, struct jffs2_inode_info *f)
 
 	jffs2_kill_fragtree(&f->fragtree, deleted?c:NULL);
 
-	if (f->target) {
-		kfree(f->target);
-		f->target = NULL;
-	}
-
 	fds = f->dents;
 	while(fds) {
 		fd = fds;
diff --git a/fs/jffs2/super.c b/fs/jffs2/super.c
index bb6ae387469f..af4aa6599473 100644
--- a/fs/jffs2/super.c
+++ b/fs/jffs2/super.c
@@ -44,15 +44,12 @@ static struct inode *jffs2_alloc_inode(struct super_block *sb)
 	return &f->vfs_inode;
 }
 
-static void jffs2_i_callback(struct rcu_head *head)
+static void jffs2_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	kmem_cache_free(jffs2_inode_cachep, JFFS2_INODE_INFO(inode));
-}
+	struct jffs2_inode_info *f = JFFS2_INODE_INFO(inode);
 
-static void jffs2_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, jffs2_i_callback);
+	kfree(f->target);
+	kmem_cache_free(jffs2_inode_cachep, f);
 }
 
 static void jffs2_i_init_once(void *foo)
@@ -255,7 +252,7 @@ static int jffs2_remount_fs(struct super_block *sb, int *flags, char *data)
 static const struct super_operations jffs2_super_operations =
 {
 	.alloc_inode =	jffs2_alloc_inode,
-	.destroy_inode =jffs2_destroy_inode,
+	.free_inode =	jffs2_free_inode,
 	.put_super =	jffs2_put_super,
 	.statfs =	jffs2_statfs,
 	.remount_fs =	jffs2_remount_fs,
diff --git a/fs/jfs/Kconfig b/fs/jfs/Kconfig
index 851de78fdabb..22a273bd4648 100644
--- a/fs/jfs/Kconfig
+++ b/fs/jfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config JFS_FS
 	tristate "JFS filesystem support"
 	select NLS
diff --git a/fs/jfs/acl.c b/fs/jfs/acl.c
index 8c06a6ea862d..92cc0ac2d1fc 100644
--- a/fs/jfs/acl.c
+++ b/fs/jfs/acl.c
@@ -1,21 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines  Corp., 2002-2004
  *   Copyright (C) Andreas Gruenbacher, 2001
  *   Copyright (C) Linus Torvalds, 1991, 1992
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/sched.h>
@@ -117,7 +104,8 @@ int jfs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 		rc = posix_acl_update_mode(inode, &mode, &acl);
 		if (rc)
 			goto end_tx;
-		update_mode = 1;
+		if (mode != inode->i_mode)
+			update_mode = 1;
 	}
 	rc = __jfs_set_acl(tid, inode, type, acl);
 	if (!rc) {
diff --git a/fs/jfs/file.c b/fs/jfs/file.c
index 36665fd37095..930d2701f206 100644
--- a/fs/jfs/file.c
+++ b/fs/jfs/file.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/mm.h>
diff --git a/fs/jfs/inode.c b/fs/jfs/inode.c
index 805ae9e8944a..9486afcdac76 100644
--- a/fs/jfs/inode.c
+++ b/fs/jfs/inode.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
@@ -31,6 +18,7 @@
 #include "jfs_extent.h"
 #include "jfs_unicode.h"
 #include "jfs_debug.h"
+#include "jfs_dmap.h"
 
 
 struct inode *jfs_iget(struct super_block *sb, unsigned long ino)
@@ -150,6 +138,8 @@ int jfs_write_inode(struct inode *inode, struct writeback_control *wbc)
 
 void jfs_evict_inode(struct inode *inode)
 {
+	struct jfs_inode_info *ji = JFS_IP(inode);
+
 	jfs_info("In jfs_evict_inode, inode = 0x%p", inode);
 
 	if (!inode->i_nlink && !is_bad_inode(inode)) {
@@ -173,6 +163,16 @@ void jfs_evict_inode(struct inode *inode)
 	}
 	clear_inode(inode);
 	dquot_drop(inode);
+
+	BUG_ON(!list_empty(&ji->anon_inode_list));
+
+	spin_lock_irq(&ji->ag_lock);
+	if (ji->active_ag != -1) {
+		struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
+		atomic_dec(&bmap->db_active[ji->active_ag]);
+		ji->active_ag = -1;
+	}
+	spin_unlock_irq(&ji->ag_lock);
 }
 
 void jfs_dirty_inode(struct inode *inode, int flags)
diff --git a/fs/jfs/ioctl.c b/fs/jfs/ioctl.c
index ba34dae8bd9f..10ee0ecca1a8 100644
--- a/fs/jfs/ioctl.c
+++ b/fs/jfs/ioctl.c
@@ -98,24 +98,16 @@ long jfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 		/* Lock against other parallel changes of flags */
 		inode_lock(inode);
 
-		oldflags = jfs_inode->mode2;
-
-		/*
-		 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
-		 * the relevant capability.
-		 */
-		if ((oldflags & JFS_IMMUTABLE_FL) ||
-			((flags ^ oldflags) &
-			(JFS_APPEND_FL | JFS_IMMUTABLE_FL))) {
-			if (!capable(CAP_LINUX_IMMUTABLE)) {
-				inode_unlock(inode);
-				err = -EPERM;
-				goto setflags_out;
-			}
+		oldflags = jfs_map_ext2(jfs_inode->mode2 & JFS_FL_USER_VISIBLE,
+					0);
+		err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+		if (err) {
+			inode_unlock(inode);
+			goto setflags_out;
 		}
 
 		flags = flags & JFS_FL_USER_MODIFIABLE;
-		flags |= oldflags & ~JFS_FL_USER_MODIFIABLE;
+		flags |= jfs_inode->mode2 & ~JFS_FL_USER_MODIFIABLE;
 		jfs_inode->mode2 = flags;
 
 		jfs_set_inode_flags(inode);
diff --git a/fs/jfs/jfs_acl.h b/fs/jfs/jfs_acl.h
index 489f993b7b13..9f8f92dd6f84 100644
--- a/fs/jfs/jfs_acl.h
+++ b/fs/jfs/jfs_acl.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines  Corp., 2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_ACL
 #define _H_JFS_ACL
diff --git a/fs/jfs/jfs_btree.h b/fs/jfs/jfs_btree.h
index 79c61805bd33..ce055ef50cd3 100644
--- a/fs/jfs/jfs_btree.h
+++ b/fs/jfs/jfs_btree.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef	_H_JFS_BTREE
 #define _H_JFS_BTREE
diff --git a/fs/jfs/jfs_debug.c b/fs/jfs/jfs_debug.c
index 35a5b2a81ae0..888cdd685a1e 100644
--- a/fs/jfs/jfs_debug.c
+++ b/fs/jfs/jfs_debug.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/jfs_debug.h b/fs/jfs/jfs_debug.h
index 0d9e35da8462..48e2150c092e 100644
--- a/fs/jfs/jfs_debug.h
+++ b/fs/jfs/jfs_debug.h
@@ -1,20 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_DEBUG
 #define _H_JFS_DEBUG
diff --git a/fs/jfs/jfs_dinode.h b/fs/jfs/jfs_dinode.h
index 1682a87c00b2..5fa9fd594115 100644
--- a/fs/jfs/jfs_dinode.h
+++ b/fs/jfs/jfs_dinode.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2001
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_DINODE
 #define _H_JFS_DINODE
diff --git a/fs/jfs/jfs_discard.c b/fs/jfs/jfs_discard.c
index f76ff0a46444..575cb2ba74fc 100644
--- a/fs/jfs/jfs_discard.c
+++ b/fs/jfs/jfs_discard.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) Tino Reichardt, 2012
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/jfs_discard.h b/fs/jfs/jfs_discard.h
index 40d1ee6081a0..05215fa27ebb 100644
--- a/fs/jfs/jfs_discard.h
+++ b/fs/jfs/jfs_discard.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) Tino Reichardt, 2012
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_DISCARD
 #define _H_JFS_DISCARD
diff --git a/fs/jfs/jfs_dmap.c b/fs/jfs/jfs_dmap.c
index 49263e220dbc..caade185e568 100644
--- a/fs/jfs/jfs_dmap.c
+++ b/fs/jfs/jfs_dmap.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
  *   Portions Copyright (C) Tino Reichardt, 2012
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/jfs_dmap.h b/fs/jfs/jfs_dmap.h
index 562b9a7e4311..29891fad3f09 100644
--- a/fs/jfs/jfs_dmap.h
+++ b/fs/jfs/jfs_dmap.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef	_H_JFS_DMAP
 #define _H_JFS_DMAP
diff --git a/fs/jfs/jfs_dtree.c b/fs/jfs/jfs_dtree.c
index 52bae3f5c914..3acc954f7c04 100644
--- a/fs/jfs/jfs_dtree.c
+++ b/fs/jfs/jfs_dtree.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 /*
diff --git a/fs/jfs/jfs_dtree.h b/fs/jfs/jfs_dtree.h
index fd4169e6e698..1758289647a0 100644
--- a/fs/jfs/jfs_dtree.h
+++ b/fs/jfs/jfs_dtree.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_DTREE
 #define	_H_JFS_DTREE
diff --git a/fs/jfs/jfs_extent.c b/fs/jfs/jfs_extent.c
index 2ae7d59ab10a..f65bd6b35412 100644
--- a/fs/jfs/jfs_extent.c
+++ b/fs/jfs/jfs_extent.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/jfs_extent.h b/fs/jfs/jfs_extent.h
index b567e12c52d3..dd635a8a0f8c 100644
--- a/fs/jfs/jfs_extent.h
+++ b/fs/jfs/jfs_extent.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2001
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef	_H_JFS_EXTENT
 #define _H_JFS_EXTENT
diff --git a/fs/jfs/jfs_filsys.h b/fs/jfs/jfs_filsys.h
index b67d64671bb4..1e899298f7f0 100644
--- a/fs/jfs/jfs_filsys.h
+++ b/fs/jfs/jfs_filsys.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2003
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_FILSYS
 #define _H_JFS_FILSYS
diff --git a/fs/jfs/jfs_imap.c b/fs/jfs/jfs_imap.c
index 93e8c590ff5c..937ca07b58b1 100644
--- a/fs/jfs/jfs_imap.c
+++ b/fs/jfs/jfs_imap.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 /*
diff --git a/fs/jfs/jfs_imap.h b/fs/jfs/jfs_imap.h
index 610a0e9d8941..dd7409febe28 100644
--- a/fs/jfs/jfs_imap.h
+++ b/fs/jfs/jfs_imap.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef	_H_JFS_IMAP
 #define _H_JFS_IMAP
diff --git a/fs/jfs/jfs_incore.h b/fs/jfs/jfs_incore.h
index 912a3af2393e..a466ec41cfbb 100644
--- a/fs/jfs/jfs_incore.h
+++ b/fs/jfs/jfs_incore.h
@@ -1,20 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_INCORE
 #define _H_JFS_INCORE
@@ -23,6 +10,8 @@
 #include <linux/rwsem.h>
 #include <linux/slab.h>
 #include <linux/bitops.h>
+#include <linux/uuid.h>
+
 #include "jfs_types.h"
 #include "jfs_xtree.h"
 #include "jfs_dtree.h"
@@ -178,8 +167,8 @@ struct jfs_sb_info {
 	pxd_t		logpxd;		/* pxd describing log	*/
 	pxd_t		fsckpxd;	/* pxd describing fsck wkspc */
 	pxd_t		ait2;		/* pxd describing AIT copy	*/
-	char		uuid[16];	/* 128-bit uuid for volume	*/
-	char		loguuid[16];	/* 128-bit uuid for log	*/
+	uuid_t		uuid;		/* 128-bit uuid for volume	*/
+	uuid_t		loguuid;	/* 128-bit uuid for log	*/
 	/*
 	 * commit_state is used for synchronization of the jfs_commit
 	 * threads.  It is protected by LAZY_LOCK().
diff --git a/fs/jfs/jfs_inode.c b/fs/jfs/jfs_inode.c
index 4572b7cf183d..4cef170630db 100644
--- a/fs/jfs/jfs_inode.c
+++ b/fs/jfs/jfs_inode.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/jfs_inode.h b/fs/jfs/jfs_inode.h
index 7b0b3a40788f..70a0d12e427e 100644
--- a/fs/jfs/jfs_inode.h
+++ b/fs/jfs/jfs_inode.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2001
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef	_H_JFS_INODE
 #define _H_JFS_INODE
diff --git a/fs/jfs/jfs_lock.h b/fs/jfs/jfs_lock.h
index ecf04882265e..feb37dd9debf 100644
--- a/fs/jfs/jfs_lock.h
+++ b/fs/jfs/jfs_lock.h
@@ -1,20 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2001
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_LOCK
 #define _H_JFS_LOCK
diff --git a/fs/jfs/jfs_logmgr.c b/fs/jfs/jfs_logmgr.c
index 6b68df395892..9330eff210e0 100644
--- a/fs/jfs/jfs_logmgr.c
+++ b/fs/jfs/jfs_logmgr.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 /*
@@ -1092,8 +1079,7 @@ int lmLogOpen(struct super_block *sb)
 	mutex_lock(&jfs_log_mutex);
 	list_for_each_entry(log, &jfs_external_logs, journal_list) {
 		if (log->bdev->bd_dev == sbi->logdev) {
-			if (memcmp(log->uuid, sbi->loguuid,
-				   sizeof(log->uuid))) {
+			if (!uuid_equal(&log->uuid, &sbi->loguuid)) {
 				jfs_warn("wrong uuid on JFS journal");
 				mutex_unlock(&jfs_log_mutex);
 				return -EINVAL;
@@ -1130,7 +1116,7 @@ int lmLogOpen(struct super_block *sb)
 	}
 
 	log->bdev = bdev;
-	memcpy(log->uuid, sbi->loguuid, sizeof(log->uuid));
+	uuid_copy(&log->uuid, &sbi->loguuid);
 
 	/*
 	 * initialize log:
@@ -1336,7 +1322,7 @@ int lmLogInit(struct jfs_log * log)
 			jfs_info("lmLogInit: inline log:0x%p base:0x%Lx size:0x%x",
 				 log, (unsigned long long)log->base, log->size);
 		} else {
-			if (memcmp(logsuper->uuid, log->uuid, 16)) {
+			if (!uuid_equal(&logsuper->uuid, &log->uuid)) {
 				jfs_warn("wrong uuid on JFS log device");
 				goto errout20;
 			}
@@ -1732,7 +1718,7 @@ static int lmLogFileSystem(struct jfs_log * log, struct jfs_sb_info *sbi,
 	int i;
 	struct logsuper *logsuper;
 	struct lbuf *bpsuper;
-	char *uuid = sbi->uuid;
+	uuid_t *uuid = &sbi->uuid;
 
 	/*
 	 * insert/remove file system device to log active file system list.
@@ -1743,8 +1729,8 @@ static int lmLogFileSystem(struct jfs_log * log, struct jfs_sb_info *sbi,
 	logsuper = (struct logsuper *) bpsuper->l_ldata;
 	if (activate) {
 		for (i = 0; i < MAX_ACTIVE; i++)
-			if (!memcmp(logsuper->active[i].uuid, NULL_UUID, 16)) {
-				memcpy(logsuper->active[i].uuid, uuid, 16);
+			if (uuid_is_null(&logsuper->active[i].uuid)) {
+				uuid_copy(&logsuper->active[i].uuid, uuid);
 				sbi->aggregate = i;
 				break;
 			}
@@ -1755,8 +1741,9 @@ static int lmLogFileSystem(struct jfs_log * log, struct jfs_sb_info *sbi,
 		}
 	} else {
 		for (i = 0; i < MAX_ACTIVE; i++)
-			if (!memcmp(logsuper->active[i].uuid, uuid, 16)) {
-				memcpy(logsuper->active[i].uuid, NULL_UUID, 16);
+			if (uuid_equal(&logsuper->active[i].uuid, uuid)) {
+				uuid_copy(&logsuper->active[i].uuid,
+					  &uuid_null);
 				break;
 			}
 		if (i == MAX_ACTIVE) {
diff --git a/fs/jfs/jfs_logmgr.h b/fs/jfs/jfs_logmgr.h
index e38c21598850..7fd125c8dd19 100644
--- a/fs/jfs/jfs_logmgr.h
+++ b/fs/jfs/jfs_logmgr.h
@@ -1,24 +1,13 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef	_H_JFS_LOGMGR
 #define _H_JFS_LOGMGR
 
+#include <linux/uuid.h>
+
 #include "jfs_filsys.h"
 #include "jfs_lock.h"
 
@@ -73,15 +62,13 @@ struct logsuper {
 	__le32 state;		/* 4: state - see below */
 
 	__le32 end;		/* 4: addr of last log record set by logredo */
-	char uuid[16];		/* 16: 128-bit journal uuid */
+	uuid_t uuid;		/* 16: 128-bit journal uuid */
 	char label[16];		/* 16: journal label */
 	struct {
-		char uuid[16];
+		uuid_t uuid;
 	} active[MAX_ACTIVE];	/* 2048: active file systems list */
 };
 
-#define NULL_UUID "\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0\0"
-
 /* log flag: commit option (see jfs_filsys.h) */
 
 /* log state */
@@ -410,7 +397,7 @@ struct jfs_log {
 	spinlock_t synclock;	/* 4: synclist lock */
 	struct lbuf *wqueue;	/* 4: log pageout queue */
 	int count;		/* 4: count */
-	char uuid[16];		/* 16: 128-bit uuid of log device */
+	uuid_t uuid;		/* 16: 128-bit uuid of log device */
 
 	int no_integrity;	/* 3: flag to disable journaling to disk */
 };
diff --git a/fs/jfs/jfs_metapage.c b/fs/jfs/jfs_metapage.c
index fa2c6824c7f2..a2f5338a5ea1 100644
--- a/fs/jfs/jfs_metapage.c
+++ b/fs/jfs/jfs_metapage.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2005
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/jfs_metapage.h b/fs/jfs/jfs_metapage.h
index 8b0ee514eb84..4179f9df4deb 100644
--- a/fs/jfs/jfs_metapage.h
+++ b/fs/jfs/jfs_metapage.h
@@ -1,20 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef	_H_JFS_METAPAGE
 #define _H_JFS_METAPAGE
diff --git a/fs/jfs/jfs_mount.c b/fs/jfs/jfs_mount.c
index d8658607bf46..eb8b9e233d73 100644
--- a/fs/jfs/jfs_mount.c
+++ b/fs/jfs/jfs_mount.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 /*
@@ -389,8 +376,8 @@ static int chkSuper(struct super_block *sb)
 		sbi->logpxd = j_sb->s_logpxd;
 	else {
 		sbi->logdev = new_decode_dev(le32_to_cpu(j_sb->s_logdev));
-		memcpy(sbi->uuid, j_sb->s_uuid, sizeof(sbi->uuid));
-		memcpy(sbi->loguuid, j_sb->s_loguuid, sizeof(sbi->uuid));
+		uuid_copy(&sbi->uuid, &j_sb->s_uuid);
+		uuid_copy(&sbi->loguuid, &j_sb->s_loguuid);
 	}
 	sbi->fsckpxd = j_sb->s_fsckpxd;
 	sbi->ait2 = j_sb->s_ait2;
diff --git a/fs/jfs/jfs_superblock.h b/fs/jfs/jfs_superblock.h
index 04847b8d3070..93402c42070f 100644
--- a/fs/jfs/jfs_superblock.h
+++ b/fs/jfs/jfs_superblock.h
@@ -1,23 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2003
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef	_H_JFS_SUPERBLOCK
 #define _H_JFS_SUPERBLOCK
 
+#include <linux/uuid.h>
+
 /*
  * make the magic number something a human could read
  */
@@ -98,11 +87,9 @@ struct jfs_superblock {
 	__le64 s_xsize;		/* 8: extendfs s_size */
 	pxd_t s_xfsckpxd;	/* 8: extendfs fsckpxd */
 	pxd_t s_xlogpxd;	/* 8: extendfs logpxd */
-	/* - 128 byte boundary - */
-
-	char s_uuid[16];	/* 16: 128-bit uuid for volume */
+	uuid_t s_uuid;		/* 16: 128-bit uuid for volume */
 	char s_label[16];	/* 16: volume label */
-	char s_loguuid[16];	/* 16: 128-bit uuid for log device */
+	uuid_t s_loguuid;	/* 16: 128-bit uuid for log device */
 
 };
 
diff --git a/fs/jfs/jfs_txnmgr.c b/fs/jfs/jfs_txnmgr.c
index a5663cb621d8..c8ce7f1bc594 100644
--- a/fs/jfs/jfs_txnmgr.c
+++ b/fs/jfs/jfs_txnmgr.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2005
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 /*
@@ -1928,8 +1915,7 @@ static void xtLog(struct jfs_log * log, struct tblock * tblk, struct lrd * lrd,
 	 * header ?
 	 */
 	if (tlck->type & tlckTRUNCATE) {
-		/* This odd declaration suppresses a bogus gcc warning */
-		pxd_t pxd = pxd;	/* truncated extent of xad */
+		pxd_t pxd;	/* truncated extent of xad */
 		int twm;
 
 		/*
diff --git a/fs/jfs/jfs_txnmgr.h b/fs/jfs/jfs_txnmgr.h
index ab7288937019..ba71eb5ced56 100644
--- a/fs/jfs/jfs_txnmgr.h
+++ b/fs/jfs/jfs_txnmgr.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_TXNMGR
 #define _H_JFS_TXNMGR
diff --git a/fs/jfs/jfs_types.h b/fs/jfs/jfs_types.h
index 8f602dcb51fa..3ff9f26bc3e6 100644
--- a/fs/jfs/jfs_types.h
+++ b/fs/jfs/jfs_types.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_TYPES
 #define	_H_JFS_TYPES
diff --git a/fs/jfs/jfs_umount.c b/fs/jfs/jfs_umount.c
index 7971f37534a3..3e8b13e6aa01 100644
--- a/fs/jfs/jfs_umount.c
+++ b/fs/jfs/jfs_umount.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 /*
diff --git a/fs/jfs/jfs_unicode.c b/fs/jfs/jfs_unicode.c
index 0148e2e4d97a..0c1e9027245a 100644
--- a/fs/jfs/jfs_unicode.c
+++ b/fs/jfs/jfs_unicode.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/jfs_unicode.h b/fs/jfs/jfs_unicode.h
index 8f0f02cb6ca6..9db62d047daa 100644
--- a/fs/jfs/jfs_unicode.h
+++ b/fs/jfs/jfs_unicode.h
@@ -1,20 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_UNICODE
 #define _H_JFS_UNICODE
diff --git a/fs/jfs/jfs_uniupr.c b/fs/jfs/jfs_uniupr.c
index cfe50666d312..d0b18c7befb8 100644
--- a/fs/jfs/jfs_uniupr.c
+++ b/fs/jfs/jfs_uniupr.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/jfs_xattr.h b/fs/jfs/jfs_xattr.h
index 561f6af46288..f0558b3348da 100644
--- a/fs/jfs/jfs_xattr.h
+++ b/fs/jfs/jfs_xattr.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #ifndef H_JFS_XATTR
diff --git a/fs/jfs/jfs_xtree.c b/fs/jfs/jfs_xtree.c
index 2c200b5256a6..16ad920f6fb1 100644
--- a/fs/jfs/jfs_xtree.c
+++ b/fs/jfs/jfs_xtree.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2005
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 /*
  *	jfs_xtree.c: extent allocation descriptor B+-tree manager
diff --git a/fs/jfs/jfs_xtree.h b/fs/jfs/jfs_xtree.h
index 1e0987986d5f..5f51be8596b3 100644
--- a/fs/jfs/jfs_xtree.h
+++ b/fs/jfs/jfs_xtree.h
@@ -1,19 +1,6 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 #ifndef _H_JFS_XTREE
 #define _H_JFS_XTREE
diff --git a/fs/jfs/namei.c b/fs/jfs/namei.c
index 14528c0ffe63..7a55d14cc1af 100644
--- a/fs/jfs/namei.c
+++ b/fs/jfs/namei.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
@@ -203,7 +190,7 @@ static int jfs_create(struct inode *dip, struct dentry *dentry, umode_t mode,
  * RETURN:	Errors from subroutines
  *
  * note:
- * EACCESS: user needs search+write permission on the parent directory
+ * EACCES: user needs search+write permission on the parent directory
  */
 static int jfs_mkdir(struct inode *dip, struct dentry *dentry, umode_t mode)
 {
diff --git a/fs/jfs/resize.c b/fs/jfs/resize.c
index 7ddcb445a3d9..66acea9d878b 100644
--- a/fs/jfs/resize.c
+++ b/fs/jfs/resize.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines  Corp., 2000-2004
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
 */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/super.c b/fs/jfs/super.c
index 65d8fc87ab11..f4e10cb9f734 100644
--- a/fs/jfs/super.c
+++ b/fs/jfs/super.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines Corp., 2000-2004
  *   Portions Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
@@ -124,27 +111,9 @@ static struct inode *jfs_alloc_inode(struct super_block *sb)
 	return &jfs_inode->vfs_inode;
 }
 
-static void jfs_i_callback(struct rcu_head *head)
+static void jfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	struct jfs_inode_info *ji = JFS_IP(inode);
-	kmem_cache_free(jfs_inode_cachep, ji);
-}
-
-static void jfs_destroy_inode(struct inode *inode)
-{
-	struct jfs_inode_info *ji = JFS_IP(inode);
-
-	BUG_ON(!list_empty(&ji->anon_inode_list));
-
-	spin_lock_irq(&ji->ag_lock);
-	if (ji->active_ag != -1) {
-		struct bmap *bmap = JFS_SBI(inode->i_sb)->bmap;
-		atomic_dec(&bmap->db_active[ji->active_ag]);
-		ji->active_ag = -1;
-	}
-	spin_unlock_irq(&ji->ag_lock);
-	call_rcu(&inode->i_rcu, jfs_i_callback);
+	kmem_cache_free(jfs_inode_cachep, JFS_IP(inode));
 }
 
 static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
@@ -174,9 +143,11 @@ static int jfs_statfs(struct dentry *dentry, struct kstatfs *buf)
 	buf->f_files = maxinodes;
 	buf->f_ffree = maxinodes - (atomic_read(&imap->im_numinos) -
 				    atomic_read(&imap->im_numfree));
-	buf->f_fsid.val[0] = (u32)crc32_le(0, sbi->uuid, sizeof(sbi->uuid)/2);
-	buf->f_fsid.val[1] = (u32)crc32_le(0, sbi->uuid + sizeof(sbi->uuid)/2,
-					sizeof(sbi->uuid)/2);
+	buf->f_fsid.val[0] = crc32_le(0, (char *)&sbi->uuid,
+				      sizeof(sbi->uuid)/2);
+	buf->f_fsid.val[1] = crc32_le(0,
+				      (char *)&sbi->uuid + sizeof(sbi->uuid)/2,
+				      sizeof(sbi->uuid)/2);
 
 	buf->f_namelen = JFS_NAME_MAX;
 	return 0;
@@ -912,7 +883,7 @@ out:
 
 static const struct super_operations jfs_super_operations = {
 	.alloc_inode	= jfs_alloc_inode,
-	.destroy_inode	= jfs_destroy_inode,
+	.free_inode	= jfs_free_inode,
 	.dirty_inode	= jfs_dirty_inode,
 	.write_inode	= jfs_write_inode,
 	.evict_inode	= jfs_evict_inode,
diff --git a/fs/jfs/symlink.c b/fs/jfs/symlink.c
index 38320607993e..a040719aafc4 100644
--- a/fs/jfs/symlink.c
+++ b/fs/jfs/symlink.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) Christoph Hellwig, 2001-2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/jfs/xattr.c b/fs/jfs/xattr.c
index a6797986b625..db41e7803163 100644
--- a/fs/jfs/xattr.c
+++ b/fs/jfs/xattr.c
@@ -1,20 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *   Copyright (C) International Business Machines  Corp., 2000-2004
  *   Copyright (C) Christoph Hellwig, 2002
- *
- *   This program is free software;  you can redistribute it and/or modify
- *   it under the terms of the GNU General Public License as published by
- *   the Free Software Foundation; either version 2 of the License, or
- *   (at your option) any later version.
- *
- *   This program is distributed in the hope that it will be useful,
- *   but WITHOUT ANY WARRANTY;  without even the implied warranty of
- *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See
- *   the GNU General Public License for more details.
- *
- *   You should have received a copy of the GNU General Public License
- *   along with this program;  if not, write to the Free Software
- *   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  */
 
 #include <linux/capability.h>
diff --git a/fs/kernfs/Kconfig b/fs/kernfs/Kconfig
index 397b5f7a7a16..e7f09105f6e9 100644
--- a/fs/kernfs/Kconfig
+++ b/fs/kernfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # KERNFS should be selected by its users
 #
diff --git a/fs/kernfs/Makefile b/fs/kernfs/Makefile
index 674337c76673..4ca54ff54c98 100644
--- a/fs/kernfs/Makefile
+++ b/fs/kernfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the kernfs pseudo filesystem
 #
diff --git a/fs/kernfs/dir.c b/fs/kernfs/dir.c
index 4ca0b5c18192..a387534c9577 100644
--- a/fs/kernfs/dir.c
+++ b/fs/kernfs/dir.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/kernfs/dir.c - kernfs directory implementation
  *
  * Copyright (c) 2001-3 Patrick Mochel
  * Copyright (c) 2007 SUSE Linux Products GmbH
  * Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
- *
- * This file is released under the GPLv2.
  */
 
 #include <linux/sched.h>
@@ -532,12 +531,9 @@ void kernfs_put(struct kernfs_node *kn)
 	kfree_const(kn->name);
 
 	if (kn->iattr) {
-		if (kn->iattr->ia_secdata)
-			security_release_secctx(kn->iattr->ia_secdata,
-						kn->iattr->ia_secdata_len);
 		simple_xattrs_free(&kn->iattr->xattrs);
+		kmem_cache_free(kernfs_iattrs_cache, kn->iattr);
 	}
-	kfree(kn->iattr);
 	spin_lock(&kernfs_idr_lock);
 	idr_remove(&root->ino_idr, kn->id.ino);
 	spin_unlock(&kernfs_idr_lock);
@@ -618,6 +614,7 @@ struct kernfs_node *kernfs_node_from_dentry(struct dentry *dentry)
 }
 
 static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root,
+					     struct kernfs_node *parent,
 					     const char *name, umode_t mode,
 					     kuid_t uid, kgid_t gid,
 					     unsigned flags)
@@ -650,11 +647,10 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root,
 	kn->id.generation = gen;
 
 	/*
-	 * set ino first. This barrier is paired with atomic_inc_not_zero in
+	 * set ino first. This RELEASE is paired with atomic_inc_not_zero in
 	 * kernfs_find_and_get_node_by_ino
 	 */
-	smp_mb__before_atomic();
-	atomic_set(&kn->count, 1);
+	atomic_set_release(&kn->count, 1);
 	atomic_set(&kn->active, KN_DEACTIVATED_BIAS);
 	RB_CLEAR_NODE(&kn->rb);
 
@@ -674,6 +670,12 @@ static struct kernfs_node *__kernfs_new_node(struct kernfs_root *root,
 			goto err_out3;
 	}
 
+	if (parent) {
+		ret = security_kernfs_init_security(parent, kn);
+		if (ret)
+			goto err_out3;
+	}
+
 	return kn;
 
  err_out3:
@@ -692,7 +694,7 @@ struct kernfs_node *kernfs_new_node(struct kernfs_node *parent,
 {
 	struct kernfs_node *kn;
 
-	kn = __kernfs_new_node(kernfs_root(parent),
+	kn = __kernfs_new_node(kernfs_root(parent), parent,
 			       name, mode, uid, gid, flags);
 	if (kn) {
 		kernfs_get(parent);
@@ -795,9 +797,8 @@ int kernfs_add_one(struct kernfs_node *kn)
 	/* Update timestamps on the parent */
 	ps_iattr = parent->iattr;
 	if (ps_iattr) {
-		struct iattr *ps_iattrs = &ps_iattr->ia_iattr;
-		ktime_get_real_ts64(&ps_iattrs->ia_ctime);
-		ps_iattrs->ia_mtime = ps_iattrs->ia_ctime;
+		ktime_get_real_ts64(&ps_iattr->ia_ctime);
+		ps_iattr->ia_mtime = ps_iattr->ia_ctime;
 	}
 
 	mutex_unlock(&kernfs_mutex);
@@ -962,7 +963,7 @@ struct kernfs_root *kernfs_create_root(struct kernfs_syscall_ops *scops,
 	INIT_LIST_HEAD(&root->supers);
 	root->next_generation = 1;
 
-	kn = __kernfs_new_node(root, "", S_IFDIR | S_IRUGO | S_IXUGO,
+	kn = __kernfs_new_node(root, NULL, "", S_IFDIR | S_IRUGO | S_IXUGO,
 			       GLOBAL_ROOT_UID, GLOBAL_ROOT_GID,
 			       KERNFS_DIR);
 	if (!kn) {
@@ -1329,9 +1330,8 @@ static void __kernfs_remove(struct kernfs_node *kn)
 
 			/* update timestamps on the parent */
 			if (ps_iattr) {
-				ktime_get_real_ts64(&ps_iattr->ia_iattr.ia_ctime);
-				ps_iattr->ia_iattr.ia_mtime =
-					ps_iattr->ia_iattr.ia_ctime;
+				ktime_get_real_ts64(&ps_iattr->ia_ctime);
+				ps_iattr->ia_mtime = ps_iattr->ia_ctime;
 			}
 
 			kernfs_put(pos);
diff --git a/fs/kernfs/file.c b/fs/kernfs/file.c
index f8d5021a652e..e8c792b49616 100644
--- a/fs/kernfs/file.c
+++ b/fs/kernfs/file.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/kernfs/file.c - kernfs file implementation
  *
  * Copyright (c) 2001-3 Patrick Mochel
  * Copyright (c) 2007 SUSE Linux Products GmbH
  * Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
- *
- * This file is released under the GPLv2.
  */
 
 #include <linux/fs.h>
@@ -832,26 +831,35 @@ void kernfs_drain_open_files(struct kernfs_node *kn)
  * to see if it supports poll (Neither 'poll' nor 'select' return
  * an appropriate error code).  When in doubt, set a suitable timeout value.
  */
+__poll_t kernfs_generic_poll(struct kernfs_open_file *of, poll_table *wait)
+{
+	struct kernfs_node *kn = kernfs_dentry_node(of->file->f_path.dentry);
+	struct kernfs_open_node *on = kn->attr.open;
+
+	poll_wait(of->file, &on->poll, wait);
+
+	if (of->event != atomic_read(&on->event))
+		return DEFAULT_POLLMASK|EPOLLERR|EPOLLPRI;
+
+	return DEFAULT_POLLMASK;
+}
+
 static __poll_t kernfs_fop_poll(struct file *filp, poll_table *wait)
 {
 	struct kernfs_open_file *of = kernfs_of(filp);
 	struct kernfs_node *kn = kernfs_dentry_node(filp->f_path.dentry);
-	struct kernfs_open_node *on = kn->attr.open;
+	__poll_t ret;
 
 	if (!kernfs_get_active(kn))
-		goto trigger;
+		return DEFAULT_POLLMASK|EPOLLERR|EPOLLPRI;
 
-	poll_wait(filp, &on->poll, wait);
+	if (kn->attr.ops->poll)
+		ret = kn->attr.ops->poll(of, wait);
+	else
+		ret = kernfs_generic_poll(of, wait);
 
 	kernfs_put_active(kn);
-
-	if (of->event != atomic_read(&on->event))
-		goto trigger;
-
-	return DEFAULT_POLLMASK;
-
- trigger:
-	return DEFAULT_POLLMASK|EPOLLERR|EPOLLPRI;
+	return ret;
 }
 
 static void kernfs_notify_workfn(struct work_struct *work)
@@ -876,6 +884,7 @@ repeat:
 	list_for_each_entry(info, &kernfs_root(kn)->supers, node) {
 		struct kernfs_node *parent;
 		struct inode *inode;
+		struct qstr name;
 
 		/*
 		 * We want fsnotify_modify() on @kn but as the
@@ -887,6 +896,7 @@ repeat:
 		if (!inode)
 			continue;
 
+		name = (struct qstr)QSTR_INIT(kn->name, strlen(kn->name));
 		parent = kernfs_get_parent(kn);
 		if (parent) {
 			struct inode *p_inode;
@@ -894,7 +904,7 @@ repeat:
 			p_inode = ilookup(info->sb, parent->id.ino);
 			if (p_inode) {
 				fsnotify(p_inode, FS_MODIFY | FS_EVENT_ON_CHILD,
-					 inode, FSNOTIFY_EVENT_INODE, kn->name, 0);
+					 inode, FSNOTIFY_EVENT_INODE, &name, 0);
 				iput(p_inode);
 			}
 
@@ -902,7 +912,7 @@ repeat:
 		}
 
 		fsnotify(inode, FS_MODIFY, inode, FSNOTIFY_EVENT_INODE,
-			 kn->name, 0);
+			 &name, 0);
 		iput(inode);
 	}
 
diff --git a/fs/kernfs/inode.c b/fs/kernfs/inode.c
index 80cebcd94c90..f3f3984cce80 100644
--- a/fs/kernfs/inode.c
+++ b/fs/kernfs/inode.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/kernfs/inode.c - kernfs inode implementation
  *
  * Copyright (c) 2001-3 Patrick Mochel
  * Copyright (c) 2007 SUSE Linux Products GmbH
  * Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
- *
- * This file is released under the GPLv2.
  */
 
 #include <linux/pagemap.h>
@@ -31,30 +30,27 @@ static const struct inode_operations kernfs_iops = {
 	.listxattr	= kernfs_iop_listxattr,
 };
 
-static struct kernfs_iattrs *kernfs_iattrs(struct kernfs_node *kn)
+static struct kernfs_iattrs *__kernfs_iattrs(struct kernfs_node *kn, int alloc)
 {
 	static DEFINE_MUTEX(iattr_mutex);
 	struct kernfs_iattrs *ret;
-	struct iattr *iattrs;
 
 	mutex_lock(&iattr_mutex);
 
-	if (kn->iattr)
+	if (kn->iattr || !alloc)
 		goto out_unlock;
 
-	kn->iattr = kzalloc(sizeof(struct kernfs_iattrs), GFP_KERNEL);
+	kn->iattr = kmem_cache_zalloc(kernfs_iattrs_cache, GFP_KERNEL);
 	if (!kn->iattr)
 		goto out_unlock;
-	iattrs = &kn->iattr->ia_iattr;
 
 	/* assign default attributes */
-	iattrs->ia_mode = kn->mode;
-	iattrs->ia_uid = GLOBAL_ROOT_UID;
-	iattrs->ia_gid = GLOBAL_ROOT_GID;
+	kn->iattr->ia_uid = GLOBAL_ROOT_UID;
+	kn->iattr->ia_gid = GLOBAL_ROOT_GID;
 
-	ktime_get_real_ts64(&iattrs->ia_atime);
-	iattrs->ia_mtime = iattrs->ia_atime;
-	iattrs->ia_ctime = iattrs->ia_atime;
+	ktime_get_real_ts64(&kn->iattr->ia_atime);
+	kn->iattr->ia_mtime = kn->iattr->ia_atime;
+	kn->iattr->ia_ctime = kn->iattr->ia_atime;
 
 	simple_xattrs_init(&kn->iattr->xattrs);
 out_unlock:
@@ -63,32 +59,37 @@ out_unlock:
 	return ret;
 }
 
+static struct kernfs_iattrs *kernfs_iattrs(struct kernfs_node *kn)
+{
+	return __kernfs_iattrs(kn, 1);
+}
+
+static struct kernfs_iattrs *kernfs_iattrs_noalloc(struct kernfs_node *kn)
+{
+	return __kernfs_iattrs(kn, 0);
+}
+
 int __kernfs_setattr(struct kernfs_node *kn, const struct iattr *iattr)
 {
 	struct kernfs_iattrs *attrs;
-	struct iattr *iattrs;
 	unsigned int ia_valid = iattr->ia_valid;
 
 	attrs = kernfs_iattrs(kn);
 	if (!attrs)
 		return -ENOMEM;
 
-	iattrs = &attrs->ia_iattr;
-
 	if (ia_valid & ATTR_UID)
-		iattrs->ia_uid = iattr->ia_uid;
+		attrs->ia_uid = iattr->ia_uid;
 	if (ia_valid & ATTR_GID)
-		iattrs->ia_gid = iattr->ia_gid;
+		attrs->ia_gid = iattr->ia_gid;
 	if (ia_valid & ATTR_ATIME)
-		iattrs->ia_atime = iattr->ia_atime;
+		attrs->ia_atime = iattr->ia_atime;
 	if (ia_valid & ATTR_MTIME)
-		iattrs->ia_mtime = iattr->ia_mtime;
+		attrs->ia_mtime = iattr->ia_mtime;
 	if (ia_valid & ATTR_CTIME)
-		iattrs->ia_ctime = iattr->ia_ctime;
-	if (ia_valid & ATTR_MODE) {
-		umode_t mode = iattr->ia_mode;
-		iattrs->ia_mode = kn->mode = mode;
-	}
+		attrs->ia_ctime = iattr->ia_ctime;
+	if (ia_valid & ATTR_MODE)
+		kn->mode = iattr->ia_mode;
 	return 0;
 }
 
@@ -135,23 +136,6 @@ out:
 	return error;
 }
 
-static int kernfs_node_setsecdata(struct kernfs_iattrs *attrs, void **secdata,
-				  u32 *secdata_len)
-{
-	void *old_secdata;
-	size_t old_secdata_len;
-
-	old_secdata = attrs->ia_secdata;
-	old_secdata_len = attrs->ia_secdata_len;
-
-	attrs->ia_secdata = *secdata;
-	attrs->ia_secdata_len = *secdata_len;
-
-	*secdata = old_secdata;
-	*secdata_len = old_secdata_len;
-	return 0;
-}
-
 ssize_t kernfs_iop_listxattr(struct dentry *dentry, char *buf, size_t size)
 {
 	struct kernfs_node *kn = kernfs_dentry_node(dentry);
@@ -171,14 +155,15 @@ static inline void set_default_inode_attr(struct inode *inode, umode_t mode)
 		inode->i_ctime = current_time(inode);
 }
 
-static inline void set_inode_attr(struct inode *inode, struct iattr *iattr)
+static inline void set_inode_attr(struct inode *inode,
+				  struct kernfs_iattrs *attrs)
 {
 	struct super_block *sb = inode->i_sb;
-	inode->i_uid = iattr->ia_uid;
-	inode->i_gid = iattr->ia_gid;
-	inode->i_atime = timespec64_trunc(iattr->ia_atime, sb->s_time_gran);
-	inode->i_mtime = timespec64_trunc(iattr->ia_mtime, sb->s_time_gran);
-	inode->i_ctime = timespec64_trunc(iattr->ia_ctime, sb->s_time_gran);
+	inode->i_uid = attrs->ia_uid;
+	inode->i_gid = attrs->ia_gid;
+	inode->i_atime = timespec64_trunc(attrs->ia_atime, sb->s_time_gran);
+	inode->i_mtime = timespec64_trunc(attrs->ia_mtime, sb->s_time_gran);
+	inode->i_ctime = timespec64_trunc(attrs->ia_ctime, sb->s_time_gran);
 }
 
 static void kernfs_refresh_inode(struct kernfs_node *kn, struct inode *inode)
@@ -186,15 +171,12 @@ static void kernfs_refresh_inode(struct kernfs_node *kn, struct inode *inode)
 	struct kernfs_iattrs *attrs = kn->iattr;
 
 	inode->i_mode = kn->mode;
-	if (attrs) {
+	if (attrs)
 		/*
 		 * kernfs_node has non-default attributes get them from
 		 * persistent copy in kernfs_node.
 		 */
-		set_inode_attr(inode, &attrs->ia_iattr);
-		security_inode_notifysecctx(inode, attrs->ia_secdata,
-					    attrs->ia_secdata_len);
-	}
+		set_inode_attr(inode, attrs);
 
 	if (kernfs_type(kn) == KERNFS_DIR)
 		set_nlink(inode, kn->dir.subdirs + 2);
@@ -305,78 +287,57 @@ int kernfs_iop_permission(struct inode *inode, int mask)
 	return generic_permission(inode, mask);
 }
 
-static int kernfs_xattr_get(const struct xattr_handler *handler,
-			    struct dentry *unused, struct inode *inode,
-			    const char *suffix, void *value, size_t size)
+int kernfs_xattr_get(struct kernfs_node *kn, const char *name,
+		     void *value, size_t size)
 {
-	const char *name = xattr_full_name(handler, suffix);
-	struct kernfs_node *kn = inode->i_private;
-	struct kernfs_iattrs *attrs;
-
-	attrs = kernfs_iattrs(kn);
+	struct kernfs_iattrs *attrs = kernfs_iattrs_noalloc(kn);
 	if (!attrs)
-		return -ENOMEM;
+		return -ENODATA;
 
 	return simple_xattr_get(&attrs->xattrs, name, value, size);
 }
 
-static int kernfs_xattr_set(const struct xattr_handler *handler,
-			    struct dentry *unused, struct inode *inode,
-			    const char *suffix, const void *value,
-			    size_t size, int flags)
+int kernfs_xattr_set(struct kernfs_node *kn, const char *name,
+		     const void *value, size_t size, int flags)
 {
-	const char *name = xattr_full_name(handler, suffix);
-	struct kernfs_node *kn = inode->i_private;
-	struct kernfs_iattrs *attrs;
-
-	attrs = kernfs_iattrs(kn);
+	struct kernfs_iattrs *attrs = kernfs_iattrs(kn);
 	if (!attrs)
 		return -ENOMEM;
 
 	return simple_xattr_set(&attrs->xattrs, name, value, size, flags);
 }
 
-static const struct xattr_handler kernfs_trusted_xattr_handler = {
-	.prefix = XATTR_TRUSTED_PREFIX,
-	.get = kernfs_xattr_get,
-	.set = kernfs_xattr_set,
-};
-
-static int kernfs_security_xattr_set(const struct xattr_handler *handler,
-				     struct dentry *unused, struct inode *inode,
-				     const char *suffix, const void *value,
-				     size_t size, int flags)
+static int kernfs_vfs_xattr_get(const struct xattr_handler *handler,
+				struct dentry *unused, struct inode *inode,
+				const char *suffix, void *value, size_t size)
 {
+	const char *name = xattr_full_name(handler, suffix);
 	struct kernfs_node *kn = inode->i_private;
-	struct kernfs_iattrs *attrs;
-	void *secdata;
-	u32 secdata_len = 0;
-	int error;
-
-	attrs = kernfs_iattrs(kn);
-	if (!attrs)
-		return -ENOMEM;
 
-	error = security_inode_setsecurity(inode, suffix, value, size, flags);
-	if (error)
-		return error;
-	error = security_inode_getsecctx(inode, &secdata, &secdata_len);
-	if (error)
-		return error;
+	return kernfs_xattr_get(kn, name, value, size);
+}
 
-	mutex_lock(&kernfs_mutex);
-	error = kernfs_node_setsecdata(attrs, &secdata, &secdata_len);
-	mutex_unlock(&kernfs_mutex);
+static int kernfs_vfs_xattr_set(const struct xattr_handler *handler,
+				struct dentry *unused, struct inode *inode,
+				const char *suffix, const void *value,
+				size_t size, int flags)
+{
+	const char *name = xattr_full_name(handler, suffix);
+	struct kernfs_node *kn = inode->i_private;
 
-	if (secdata)
-		security_release_secctx(secdata, secdata_len);
-	return error;
+	return kernfs_xattr_set(kn, name, value, size, flags);
 }
 
+static const struct xattr_handler kernfs_trusted_xattr_handler = {
+	.prefix = XATTR_TRUSTED_PREFIX,
+	.get = kernfs_vfs_xattr_get,
+	.set = kernfs_vfs_xattr_set,
+};
+
 static const struct xattr_handler kernfs_security_xattr_handler = {
 	.prefix = XATTR_SECURITY_PREFIX,
-	.get = kernfs_xattr_get,
-	.set = kernfs_security_xattr_set,
+	.get = kernfs_vfs_xattr_get,
+	.set = kernfs_vfs_xattr_set,
 };
 
 const struct xattr_handler *kernfs_xattr_handlers[] = {
diff --git a/fs/kernfs/kernfs-internal.h b/fs/kernfs/kernfs-internal.h
index 3d83b114bb08..02ce570a9a3c 100644
--- a/fs/kernfs/kernfs-internal.h
+++ b/fs/kernfs/kernfs-internal.h
@@ -1,11 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * fs/kernfs/kernfs-internal.h - kernfs internal header file
  *
  * Copyright (c) 2001-3 Patrick Mochel
  * Copyright (c) 2007 SUSE Linux Products GmbH
  * Copyright (c) 2007, 2013 Tejun Heo <teheo@suse.de>
- *
- * This file is released under the GPLv2.
  */
 
 #ifndef __KERNFS_INTERNAL_H
@@ -17,11 +16,14 @@
 #include <linux/xattr.h>
 
 #include <linux/kernfs.h>
+#include <linux/fs_context.h>
 
 struct kernfs_iattrs {
-	struct iattr		ia_iattr;
-	void			*ia_secdata;
-	u32			ia_secdata_len;
+	kuid_t			ia_uid;
+	kgid_t			ia_gid;
+	struct timespec64	ia_atime;
+	struct timespec64	ia_mtime;
+	struct timespec64	ia_ctime;
 
 	struct simple_xattrs	xattrs;
 };
@@ -78,7 +80,7 @@ static inline struct kernfs_node *kernfs_dentry_node(struct dentry *dentry)
 }
 
 extern const struct super_operations kernfs_sops;
-extern struct kmem_cache *kernfs_node_cache;
+extern struct kmem_cache *kernfs_node_cache, *kernfs_iattrs_cache;
 
 /*
  * inode.c
diff --git a/fs/kernfs/mount.c b/fs/kernfs/mount.c
index fdf527b6d79c..6c12fac2c287 100644
--- a/fs/kernfs/mount.c
+++ b/fs/kernfs/mount.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/kernfs/mount.c - kernfs mount implementation
  *
  * Copyright (c) 2001-3 Patrick Mochel
  * Copyright (c) 2007 SUSE Linux Products GmbH
  * Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
- *
- * This file is released under the GPLv2.
  */
 
 #include <linux/fs.h>
@@ -20,17 +19,7 @@
 
 #include "kernfs-internal.h"
 
-struct kmem_cache *kernfs_node_cache;
-
-static int kernfs_sop_remount_fs(struct super_block *sb, int *flags, char *data)
-{
-	struct kernfs_root *root = kernfs_info(sb)->root;
-	struct kernfs_syscall_ops *scops = root->syscall_ops;
-
-	if (scops && scops->remount_fs)
-		return scops->remount_fs(root, flags, data);
-	return 0;
-}
+struct kmem_cache *kernfs_node_cache, *kernfs_iattrs_cache;
 
 static int kernfs_sop_show_options(struct seq_file *sf, struct dentry *dentry)
 {
@@ -60,7 +49,6 @@ const struct super_operations kernfs_sops = {
 	.drop_inode	= generic_delete_inode,
 	.evict_inode	= kernfs_evict_inode,
 
-	.remount_fs	= kernfs_sop_remount_fs,
 	.show_options	= kernfs_sop_show_options,
 	.show_path	= kernfs_sop_show_path,
 };
@@ -196,8 +184,10 @@ struct dentry *kernfs_node_dentry(struct kernfs_node *kn,
 		return dentry;
 
 	knparent = find_next_ancestor(kn, NULL);
-	if (WARN_ON(!knparent))
+	if (WARN_ON(!knparent)) {
+		dput(dentry);
 		return ERR_PTR(-EINVAL);
+	}
 
 	do {
 		struct dentry *dtmp;
@@ -206,8 +196,10 @@ struct dentry *kernfs_node_dentry(struct kernfs_node *kn,
 		if (kn == knparent)
 			return dentry;
 		kntmp = find_next_ancestor(kn, knparent);
-		if (WARN_ON(!kntmp))
+		if (WARN_ON(!kntmp)) {
+			dput(dentry);
 			return ERR_PTR(-EINVAL);
+		}
 		dtmp = lookup_one_len_unlocked(kntmp->name, dentry,
 					       strlen(kntmp->name));
 		dput(dentry);
@@ -218,7 +210,7 @@ struct dentry *kernfs_node_dentry(struct kernfs_node *kn,
 	} while (true);
 }
 
-static int kernfs_fill_super(struct super_block *sb, unsigned long magic)
+static int kernfs_fill_super(struct super_block *sb, struct kernfs_fs_context *kfc)
 {
 	struct kernfs_super_info *info = kernfs_info(sb);
 	struct inode *inode;
@@ -229,7 +221,7 @@ static int kernfs_fill_super(struct super_block *sb, unsigned long magic)
 	sb->s_iflags |= SB_I_NOEXEC | SB_I_NODEV;
 	sb->s_blocksize = PAGE_SIZE;
 	sb->s_blocksize_bits = PAGE_SHIFT;
-	sb->s_magic = magic;
+	sb->s_magic = kfc->magic;
 	sb->s_op = &kernfs_sops;
 	sb->s_xattr = kernfs_xattr_handlers;
 	if (info->root->flags & KERNFS_ROOT_SUPPORT_EXPORTOP)
@@ -259,21 +251,20 @@ static int kernfs_fill_super(struct super_block *sb, unsigned long magic)
 	return 0;
 }
 
-static int kernfs_test_super(struct super_block *sb, void *data)
+static int kernfs_test_super(struct super_block *sb, struct fs_context *fc)
 {
 	struct kernfs_super_info *sb_info = kernfs_info(sb);
-	struct kernfs_super_info *info = data;
+	struct kernfs_super_info *info = fc->s_fs_info;
 
 	return sb_info->root == info->root && sb_info->ns == info->ns;
 }
 
-static int kernfs_set_super(struct super_block *sb, void *data)
+static int kernfs_set_super(struct super_block *sb, struct fs_context *fc)
 {
-	int error;
-	error = set_anon_super(sb, data);
-	if (!error)
-		sb->s_fs_info = data;
-	return error;
+	struct kernfs_fs_context *kfc = fc->fs_private;
+
+	kfc->ns_tag = NULL;
+	return set_anon_super_fc(sb, fc);
 }
 
 /**
@@ -290,63 +281,60 @@ const void *kernfs_super_ns(struct super_block *sb)
 }
 
 /**
- * kernfs_mount_ns - kernfs mount helper
- * @fs_type: file_system_type of the fs being mounted
- * @flags: mount flags specified for the mount
- * @root: kernfs_root of the hierarchy being mounted
- * @magic: file system specific magic number
- * @new_sb_created: tell the caller if we allocated a new superblock
- * @ns: optional namespace tag of the mount
- *
- * This is to be called from each kernfs user's file_system_type->mount()
- * implementation, which should pass through the specified @fs_type and
- * @flags, and specify the hierarchy and namespace tag to mount via @root
- * and @ns, respectively.
+ * kernfs_get_tree - kernfs filesystem access/retrieval helper
+ * @fc: The filesystem context.
  *
- * The return value can be passed to the vfs layer verbatim.
+ * This is to be called from each kernfs user's fs_context->ops->get_tree()
+ * implementation, which should set the specified ->@fs_type and ->@flags, and
+ * specify the hierarchy and namespace tag to mount via ->@root and ->@ns,
+ * respectively.
  */
-struct dentry *kernfs_mount_ns(struct file_system_type *fs_type, int flags,
-				struct kernfs_root *root, unsigned long magic,
-				bool *new_sb_created, const void *ns)
+int kernfs_get_tree(struct fs_context *fc)
 {
+	struct kernfs_fs_context *kfc = fc->fs_private;
 	struct super_block *sb;
 	struct kernfs_super_info *info;
 	int error;
 
 	info = kzalloc(sizeof(*info), GFP_KERNEL);
 	if (!info)
-		return ERR_PTR(-ENOMEM);
+		return -ENOMEM;
 
-	info->root = root;
-	info->ns = ns;
+	info->root = kfc->root;
+	info->ns = kfc->ns_tag;
 	INIT_LIST_HEAD(&info->node);
 
-	sb = sget_userns(fs_type, kernfs_test_super, kernfs_set_super, flags,
-			 &init_user_ns, info);
-	if (IS_ERR(sb) || sb->s_fs_info != info)
-		kfree(info);
+	fc->s_fs_info = info;
+	sb = sget_fc(fc, kernfs_test_super, kernfs_set_super);
 	if (IS_ERR(sb))
-		return ERR_CAST(sb);
-
-	if (new_sb_created)
-		*new_sb_created = !sb->s_root;
+		return PTR_ERR(sb);
 
 	if (!sb->s_root) {
 		struct kernfs_super_info *info = kernfs_info(sb);
 
-		error = kernfs_fill_super(sb, magic);
+		kfc->new_sb_created = true;
+
+		error = kernfs_fill_super(sb, kfc);
 		if (error) {
 			deactivate_locked_super(sb);
-			return ERR_PTR(error);
+			return error;
 		}
 		sb->s_flags |= SB_ACTIVE;
 
 		mutex_lock(&kernfs_mutex);
-		list_add(&info->node, &root->supers);
+		list_add(&info->node, &info->root->supers);
 		mutex_unlock(&kernfs_mutex);
 	}
 
-	return dget(sb->s_root);
+	fc->root = dget(sb->s_root);
+	return 0;
+}
+
+void kernfs_free_fs_context(struct fs_context *fc)
+{
+	/* Note that we don't deal with kfc->ns_tag here. */
+	kfree(fc->s_fs_info);
+	fc->s_fs_info = NULL;
 }
 
 /**
@@ -373,36 +361,6 @@ void kernfs_kill_sb(struct super_block *sb)
 	kfree(info);
 }
 
-/**
- * kernfs_pin_sb: try to pin the superblock associated with a kernfs_root
- * @kernfs_root: the kernfs_root in question
- * @ns: the namespace tag
- *
- * Pin the superblock so the superblock won't be destroyed in subsequent
- * operations.  This can be used to block ->kill_sb() which may be useful
- * for kernfs users which dynamically manage superblocks.
- *
- * Returns NULL if there's no superblock associated to this kernfs_root, or
- * -EINVAL if the superblock is being freed.
- */
-struct super_block *kernfs_pin_sb(struct kernfs_root *root, const void *ns)
-{
-	struct kernfs_super_info *info;
-	struct super_block *sb = NULL;
-
-	mutex_lock(&kernfs_mutex);
-	list_for_each_entry(info, &root->supers, node) {
-		if (info->ns == ns) {
-			sb = info->sb;
-			if (!atomic_inc_not_zero(&info->sb->s_active))
-				sb = ERR_PTR(-EINVAL);
-			break;
-		}
-	}
-	mutex_unlock(&kernfs_mutex);
-	return sb;
-}
-
 void __init kernfs_init(void)
 {
 
@@ -417,4 +375,9 @@ void __init kernfs_init(void)
 					      0,
 					      SLAB_PANIC | SLAB_TYPESAFE_BY_RCU,
 					      NULL);
+
+	/* Creates slab cache for kernfs inode attributes */
+	kernfs_iattrs_cache  = kmem_cache_create("kernfs_iattrs_cache",
+					      sizeof(struct kernfs_iattrs),
+					      0, SLAB_PANIC, NULL);
 }
diff --git a/fs/kernfs/symlink.c b/fs/kernfs/symlink.c
index 162f43b80c84..5432883d819f 100644
--- a/fs/kernfs/symlink.c
+++ b/fs/kernfs/symlink.c
@@ -1,11 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/kernfs/symlink.c - kernfs symlink implementation
  *
  * Copyright (c) 2001-3 Patrick Mochel
  * Copyright (c) 2007 SUSE Linux Products GmbH
  * Copyright (c) 2007, 2013 Tejun Heo <tj@kernel.org>
- *
- * This file is released under the GPLv2.
  */
 
 #include <linux/fs.h>
@@ -33,8 +32,8 @@ struct kernfs_node *kernfs_create_link(struct kernfs_node *parent,
 	kgid_t gid = GLOBAL_ROOT_GID;
 
 	if (target->iattr) {
-		uid = target->iattr->ia_iattr.ia_uid;
-		gid = target->iattr->ia_iattr.ia_gid;
+		uid = target->iattr->ia_uid;
+		gid = target->iattr->ia_gid;
 	}
 
 	kn = kernfs_new_node(parent, name, S_IFLNK|S_IRWXUGO, uid, gid,
diff --git a/fs/libfs.c b/fs/libfs.c
index 0fb590d79f30..7e52e77692ec 100644
--- a/fs/libfs.c
+++ b/fs/libfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *	fs/libfs.c
  *	Library for filesystems writers.
@@ -146,9 +147,11 @@ loff_t dcache_dir_lseek(struct file *file, loff_t offset, int whence)
 	switch (whence) {
 		case 1:
 			offset += file->f_pos;
+			/* fall through */
 		case 0:
 			if (offset >= 0)
 				break;
+			/* fall through */
 		default:
 			return -EINVAL;
 	}
@@ -1167,6 +1170,20 @@ simple_nosetlease(struct file *filp, long arg, struct file_lock **flp,
 }
 EXPORT_SYMBOL(simple_nosetlease);
 
+/**
+ * simple_get_link - generic helper to get the target of "fast" symlinks
+ * @dentry: not used here
+ * @inode: the symlink inode
+ * @done: not used here
+ *
+ * Generic helper for filesystems to use for symlink inodes where a pointer to
+ * the symlink target is stored in ->i_link.  NOTE: this isn't normally called,
+ * since as an optimization the path lookup code uses any non-NULL ->i_link
+ * directly, without calling ->get_link().  But ->get_link() still must be set,
+ * to mark the inode_operations as being for a symlink.
+ *
+ * Return: the symlink target
+ */
 const char *simple_get_link(struct dentry *dentry, struct inode *inode,
 			    struct delayed_call *done)
 {
diff --git a/fs/lockd/clnt4xdr.c b/fs/lockd/clnt4xdr.c
index 214a2fa1f1e3..7df6324ccb8a 100644
--- a/fs/lockd/clnt4xdr.c
+++ b/fs/lockd/clnt4xdr.c
@@ -75,17 +75,6 @@ static void nlm4_compute_offsets(const struct nlm_lock *lock,
 }
 
 /*
- * Handle decode buffer overflows out-of-line.
- */
-static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
-{
-	dprintk("lockd: %s prematurely hit the end of our receive buffer. "
-		"Remaining buffer length is %tu words.\n",
-		func, xdr->end - xdr->p);
-}
-
-
-/*
  * Encode/decode NLMv4 basic data types
  *
  * Basic NLMv4 data types are defined in Appendix II, section 6.1.4
@@ -176,7 +165,6 @@ out_size:
 	dprintk("NFS: returned cookie was too long: %u\n", length);
 	return -EIO;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 }
 
@@ -236,7 +224,6 @@ out_bad_xdr:
 			__func__, be32_to_cpup(p));
 	return -EIO;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 }
 
@@ -309,7 +296,6 @@ static int decode_nlm4_holder(struct xdr_stream *xdr, struct nlm_res *result)
 out:
 	return error;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 }
 
diff --git a/fs/lockd/clntlock.c b/fs/lockd/clntlock.c
index c2a128678e6e..a5bb3f721a9d 100644
--- a/fs/lockd/clntlock.c
+++ b/fs/lockd/clntlock.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/lockd/clntlock.c
  *
@@ -56,14 +57,14 @@ struct nlm_host *nlmclnt_init(const struct nlmclnt_initdata *nlm_init)
 	u32 nlm_version = (nlm_init->nfs_version == 2) ? 1 : 4;
 	int status;
 
-	status = lockd_up(nlm_init->net);
+	status = lockd_up(nlm_init->net, nlm_init->cred);
 	if (status < 0)
 		return ERR_PTR(status);
 
 	host = nlmclnt_lookup_host(nlm_init->address, nlm_init->addrlen,
 				   nlm_init->protocol, nlm_version,
 				   nlm_init->hostname, nlm_init->noresvport,
-				   nlm_init->net);
+				   nlm_init->net, nlm_init->cred);
 	if (host == NULL)
 		goto out_nohost;
 	if (host->h_rpcclnt == NULL && nlm_bind_host(host) == NULL)
@@ -241,7 +242,7 @@ reclaimer(void *ptr)
 	allow_signal(SIGKILL);
 
 	down_write(&host->h_rwsem);
-	lockd_up(net);	/* note: this cannot fail as lockd is already running */
+	lockd_up(net, NULL);	/* note: this cannot fail as lockd is already running */
 
 	dprintk("lockd: reclaiming locks for host %s\n", host->h_name);
 
diff --git a/fs/lockd/clntproc.c b/fs/lockd/clntproc.c
index e8a004097d18..b11f2afa84f1 100644
--- a/fs/lockd/clntproc.c
+++ b/fs/lockd/clntproc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/lockd/clntproc.c
  *
@@ -46,13 +47,14 @@ void nlmclnt_next_cookie(struct nlm_cookie *c)
 	c->len=4;
 }
 
-static struct nlm_lockowner *nlm_get_lockowner(struct nlm_lockowner *lockowner)
+static struct nlm_lockowner *
+nlmclnt_get_lockowner(struct nlm_lockowner *lockowner)
 {
 	refcount_inc(&lockowner->count);
 	return lockowner;
 }
 
-static void nlm_put_lockowner(struct nlm_lockowner *lockowner)
+static void nlmclnt_put_lockowner(struct nlm_lockowner *lockowner)
 {
 	if (!refcount_dec_and_lock(&lockowner->count, &lockowner->host->h_lock))
 		return;
@@ -81,28 +83,28 @@ static inline uint32_t __nlm_alloc_pid(struct nlm_host *host)
 	return res;
 }
 
-static struct nlm_lockowner *__nlm_find_lockowner(struct nlm_host *host, fl_owner_t owner)
+static struct nlm_lockowner *__nlmclnt_find_lockowner(struct nlm_host *host, fl_owner_t owner)
 {
 	struct nlm_lockowner *lockowner;
 	list_for_each_entry(lockowner, &host->h_lockowners, list) {
 		if (lockowner->owner != owner)
 			continue;
-		return nlm_get_lockowner(lockowner);
+		return nlmclnt_get_lockowner(lockowner);
 	}
 	return NULL;
 }
 
-static struct nlm_lockowner *nlm_find_lockowner(struct nlm_host *host, fl_owner_t owner)
+static struct nlm_lockowner *nlmclnt_find_lockowner(struct nlm_host *host, fl_owner_t owner)
 {
 	struct nlm_lockowner *res, *new = NULL;
 
 	spin_lock(&host->h_lock);
-	res = __nlm_find_lockowner(host, owner);
+	res = __nlmclnt_find_lockowner(host, owner);
 	if (res == NULL) {
 		spin_unlock(&host->h_lock);
 		new = kmalloc(sizeof(*new), GFP_KERNEL);
 		spin_lock(&host->h_lock);
-		res = __nlm_find_lockowner(host, owner);
+		res = __nlmclnt_find_lockowner(host, owner);
 		if (res == NULL && new != NULL) {
 			res = new;
 			refcount_set(&new->count, 1);
@@ -456,7 +458,7 @@ static void nlmclnt_locks_copy_lock(struct file_lock *new, struct file_lock *fl)
 {
 	spin_lock(&fl->fl_u.nfs_fl.owner->host->h_lock);
 	new->fl_u.nfs_fl.state = fl->fl_u.nfs_fl.state;
-	new->fl_u.nfs_fl.owner = nlm_get_lockowner(fl->fl_u.nfs_fl.owner);
+	new->fl_u.nfs_fl.owner = nlmclnt_get_lockowner(fl->fl_u.nfs_fl.owner);
 	list_add_tail(&new->fl_u.nfs_fl.list, &fl->fl_u.nfs_fl.owner->host->h_granted);
 	spin_unlock(&fl->fl_u.nfs_fl.owner->host->h_lock);
 }
@@ -466,7 +468,7 @@ static void nlmclnt_locks_release_private(struct file_lock *fl)
 	spin_lock(&fl->fl_u.nfs_fl.owner->host->h_lock);
 	list_del(&fl->fl_u.nfs_fl.list);
 	spin_unlock(&fl->fl_u.nfs_fl.owner->host->h_lock);
-	nlm_put_lockowner(fl->fl_u.nfs_fl.owner);
+	nlmclnt_put_lockowner(fl->fl_u.nfs_fl.owner);
 }
 
 static const struct file_lock_operations nlmclnt_lock_ops = {
@@ -477,7 +479,7 @@ static const struct file_lock_operations nlmclnt_lock_ops = {
 static void nlmclnt_locks_init_private(struct file_lock *fl, struct nlm_host *host)
 {
 	fl->fl_u.nfs_fl.state = 0;
-	fl->fl_u.nfs_fl.owner = nlm_find_lockowner(host, fl->fl_owner);
+	fl->fl_u.nfs_fl.owner = nlmclnt_find_lockowner(host, fl->fl_owner);
 	INIT_LIST_HEAD(&fl->fl_u.nfs_fl.list);
 	fl->fl_ops = &nlmclnt_lock_ops;
 }
@@ -715,7 +717,7 @@ static void nlmclnt_unlock_callback(struct rpc_task *task, void *data)
 	struct nlm_rqst	*req = data;
 	u32 status = ntohl(req->a_res.status);
 
-	if (RPC_ASSASSINATED(task))
+	if (RPC_SIGNALLED(task))
 		goto die;
 
 	if (task->tk_status < 0) {
@@ -783,7 +785,7 @@ static void nlmclnt_cancel_callback(struct rpc_task *task, void *data)
 	struct nlm_rqst	*req = data;
 	u32 status = ntohl(req->a_res.status);
 
-	if (RPC_ASSASSINATED(task))
+	if (RPC_SIGNALLED(task))
 		goto die;
 
 	if (task->tk_status < 0) {
diff --git a/fs/lockd/clntxdr.c b/fs/lockd/clntxdr.c
index 747b9c8c940a..4df62f635529 100644
--- a/fs/lockd/clntxdr.c
+++ b/fs/lockd/clntxdr.c
@@ -71,17 +71,6 @@ static void nlm_compute_offsets(const struct nlm_lock *lock,
 }
 
 /*
- * Handle decode buffer overflows out-of-line.
- */
-static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
-{
-	dprintk("lockd: %s prematurely hit the end of our receive buffer. "
-		"Remaining buffer length is %tu words.\n",
-		func, xdr->end - xdr->p);
-}
-
-
-/*
  * Encode/decode NLMv3 basic data types
  *
  * Basic NLMv3 data types are not defined in an IETF standards
@@ -173,7 +162,6 @@ out_size:
 	dprintk("NFS: returned cookie was too long: %u\n", length);
 	return -EIO;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 }
 
@@ -231,7 +219,6 @@ out_enum:
 		__func__, be32_to_cpup(p));
 	return -EIO;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 }
 
@@ -303,7 +290,6 @@ static int decode_nlm_holder(struct xdr_stream *xdr, struct nlm_res *result)
 out:
 	return error;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 }
 
diff --git a/fs/lockd/host.c b/fs/lockd/host.c
index 93fb7cf0b92b..7d46fafdbbe5 100644
--- a/fs/lockd/host.c
+++ b/fs/lockd/host.c
@@ -60,6 +60,7 @@ struct nlm_lookup_host_info {
 	const size_t		hostname_len;	/* it's length */
 	const int		noresvport;	/* use non-priv port */
 	struct net		*net;		/* network namespace to bind */
+	const struct cred	*cred;
 };
 
 /*
@@ -162,6 +163,7 @@ static struct nlm_host *nlm_alloc_host(struct nlm_lookup_host_info *ni,
 	host->h_nsmhandle  = nsm;
 	host->h_addrbuf    = nsm->sm_addrbuf;
 	host->net	   = ni->net;
+	host->h_cred	   = get_cred(ni->cred),
 	strlcpy(host->nodename, utsname()->nodename, sizeof(host->nodename));
 
 out:
@@ -188,6 +190,7 @@ static void nlm_destroy_host_locked(struct nlm_host *host)
 	clnt = host->h_rpcclnt;
 	if (clnt != NULL)
 		rpc_shutdown_client(clnt);
+	put_cred(host->h_cred);
 	kfree(host);
 
 	ln->nrhosts--;
@@ -202,6 +205,8 @@ static void nlm_destroy_host_locked(struct nlm_host *host)
  * @version: NLM protocol version
  * @hostname: '\0'-terminated hostname of server
  * @noresvport: 1 if non-privileged port should be used
+ * @net: pointer to net namespace
+ * @cred: pointer to cred
  *
  * Returns an nlm_host structure that matches the passed-in
  * [server address, transport protocol, NLM version, server hostname].
@@ -214,7 +219,8 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap,
 				     const u32 version,
 				     const char *hostname,
 				     int noresvport,
-				     struct net *net)
+				     struct net *net,
+				     const struct cred *cred)
 {
 	struct nlm_lookup_host_info ni = {
 		.server		= 0,
@@ -226,6 +232,7 @@ struct nlm_host *nlmclnt_lookup_host(const struct sockaddr *sap,
 		.hostname_len	= strlen(hostname),
 		.noresvport	= noresvport,
 		.net		= net,
+		.cred		= cred,
 	};
 	struct hlist_head *chain;
 	struct nlm_host	*host;
@@ -290,12 +297,11 @@ void nlmclnt_release_host(struct nlm_host *host)
 
 	WARN_ON_ONCE(host->h_server);
 
-	if (refcount_dec_and_test(&host->h_count)) {
+	if (refcount_dec_and_mutex_lock(&host->h_count, &nlm_host_mutex)) {
 		WARN_ON_ONCE(!list_empty(&host->h_lockowners));
 		WARN_ON_ONCE(!list_empty(&host->h_granted));
 		WARN_ON_ONCE(!list_empty(&host->h_reclaim));
 
-		mutex_lock(&nlm_host_mutex);
 		nlm_destroy_host_locked(host);
 		mutex_unlock(&nlm_host_mutex);
 	}
@@ -459,6 +465,7 @@ nlm_bind_host(struct nlm_host *host)
 			.authflavor	= RPC_AUTH_UNIX,
 			.flags		= (RPC_CLNT_CREATE_NOPING |
 					   RPC_CLNT_CREATE_AUTOBIND),
+			.cred		= host->h_cred,
 		};
 
 		/*
diff --git a/fs/lockd/mon.c b/fs/lockd/mon.c
index 654594ef4f94..1eabd91870e6 100644
--- a/fs/lockd/mon.c
+++ b/fs/lockd/mon.c
@@ -82,6 +82,7 @@ static struct rpc_clnt *nsm_create(struct net *net, const char *nodename)
 		.version		= NSM_VERSION,
 		.authflavor		= RPC_AUTH_NULL,
 		.flags			= RPC_CLNT_CREATE_NOPING,
+		.cred			= current_cred(),
 	};
 
 	return rpc_create(&args);
diff --git a/fs/lockd/svc.c b/fs/lockd/svc.c
index 346ed161756d..1a639e34847d 100644
--- a/fs/lockd/svc.c
+++ b/fs/lockd/svc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/lockd/svc.c
  *
@@ -188,28 +189,31 @@ lockd(void *vrqstp)
 
 static int create_lockd_listener(struct svc_serv *serv, const char *name,
 				 struct net *net, const int family,
-				 const unsigned short port)
+				 const unsigned short port,
+				 const struct cred *cred)
 {
 	struct svc_xprt *xprt;
 
 	xprt = svc_find_xprt(serv, name, net, family, 0);
 	if (xprt == NULL)
 		return svc_create_xprt(serv, name, net, family, port,
-						SVC_SOCK_DEFAULTS);
+						SVC_SOCK_DEFAULTS, cred);
 	svc_xprt_put(xprt);
 	return 0;
 }
 
 static int create_lockd_family(struct svc_serv *serv, struct net *net,
-			       const int family)
+			       const int family, const struct cred *cred)
 {
 	int err;
 
-	err = create_lockd_listener(serv, "udp", net, family, nlm_udpport);
+	err = create_lockd_listener(serv, "udp", net, family, nlm_udpport,
+			cred);
 	if (err < 0)
 		return err;
 
-	return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport);
+	return create_lockd_listener(serv, "tcp", net, family, nlm_tcpport,
+			cred);
 }
 
 /*
@@ -222,16 +226,17 @@ static int create_lockd_family(struct svc_serv *serv, struct net *net,
  * Returns zero if all listeners are available; otherwise a
  * negative errno value is returned.
  */
-static int make_socks(struct svc_serv *serv, struct net *net)
+static int make_socks(struct svc_serv *serv, struct net *net,
+		const struct cred *cred)
 {
 	static int warned;
 	int err;
 
-	err = create_lockd_family(serv, net, PF_INET);
+	err = create_lockd_family(serv, net, PF_INET, cred);
 	if (err < 0)
 		goto out_err;
 
-	err = create_lockd_family(serv, net, PF_INET6);
+	err = create_lockd_family(serv, net, PF_INET6, cred);
 	if (err < 0 && err != -EAFNOSUPPORT)
 		goto out_err;
 
@@ -246,7 +251,8 @@ out_err:
 	return err;
 }
 
-static int lockd_up_net(struct svc_serv *serv, struct net *net)
+static int lockd_up_net(struct svc_serv *serv, struct net *net,
+		const struct cred *cred)
 {
 	struct lockd_net *ln = net_generic(net, lockd_net_id);
 	int error;
@@ -258,7 +264,7 @@ static int lockd_up_net(struct svc_serv *serv, struct net *net)
 	if (error)
 		goto err_bind;
 
-	error = make_socks(serv, net);
+	error = make_socks(serv, net, cred);
 	if (error < 0)
 		goto err_bind;
 	set_grace_period(net);
@@ -461,7 +467,7 @@ static struct svc_serv *lockd_create_svc(void)
 /*
  * Bring up the lockd process if it's not already up.
  */
-int lockd_up(struct net *net)
+int lockd_up(struct net *net, const struct cred *cred)
 {
 	struct svc_serv *serv;
 	int error;
@@ -474,7 +480,7 @@ int lockd_up(struct net *net)
 		goto err_create;
 	}
 
-	error = lockd_up_net(serv, net);
+	error = lockd_up_net(serv, net, cred);
 	if (error < 0) {
 		lockd_unregister_notifiers();
 		goto err_put;
@@ -807,5 +813,7 @@ static struct svc_program	nlmsvc_program = {
 	.pg_name		= "lockd",		/* service name */
 	.pg_class		= "nfsd",		/* share authentication with nfsd */
 	.pg_stats		= &nlmsvc_stats,	/* stats table */
-	.pg_authenticate = &lockd_authenticate	/* export authentication */
+	.pg_authenticate	= &lockd_authenticate,	/* export authentication */
+	.pg_init_request	= svc_generic_init_request,
+	.pg_rpcbind_set		= svc_generic_rpcbind_set,
 };
diff --git a/fs/lockd/svc4proc.c b/fs/lockd/svc4proc.c
index 1bddf70d9656..e4d3f783e06a 100644
--- a/fs/lockd/svc4proc.c
+++ b/fs/lockd/svc4proc.c
@@ -46,8 +46,14 @@ nlm4svc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
 
 		/* Set up the missing parts of the file_lock structure */
 		lock->fl.fl_file  = file->f_file;
-		lock->fl.fl_owner = (fl_owner_t) host;
+		lock->fl.fl_pid = current->tgid;
 		lock->fl.fl_lmops = &nlmsvc_lock_operations;
+		nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
+		if (!lock->fl.fl_owner) {
+			/* lockowner allocation has failed */
+			nlmsvc_release_host(host);
+			return nlm_lck_denied_nolocks;
+		}
 	}
 
 	return 0;
@@ -94,6 +100,7 @@ __nlm4svc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
 	else
 		dprintk("lockd: TEST4        status %d\n", ntohl(resp->status));
 
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rc;
@@ -142,6 +149,7 @@ __nlm4svc_proc_lock(struct svc_rqst *rqstp, struct nlm_res *resp)
 	else
 		dprintk("lockd: LOCK         status %d\n", ntohl(resp->status));
 
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rc;
@@ -178,6 +186,7 @@ __nlm4svc_proc_cancel(struct svc_rqst *rqstp, struct nlm_res *resp)
 	resp->status = nlmsvc_cancel_blocked(SVC_NET(rqstp), file, &argp->lock);
 
 	dprintk("lockd: CANCEL        status %d\n", ntohl(resp->status));
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rpc_success;
@@ -217,6 +226,7 @@ __nlm4svc_proc_unlock(struct svc_rqst *rqstp, struct nlm_res *resp)
 	resp->status = nlmsvc_unlock(SVC_NET(rqstp), file, &argp->lock);
 
 	dprintk("lockd: UNLOCK        status %d\n", ntohl(resp->status));
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rpc_success;
@@ -365,6 +375,7 @@ nlm4svc_proc_share(struct svc_rqst *rqstp)
 	resp->status = nlmsvc_share_file(host, file, argp);
 
 	dprintk("lockd: SHARE         status %d\n", ntohl(resp->status));
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rpc_success;
@@ -399,6 +410,7 @@ nlm4svc_proc_unshare(struct svc_rqst *rqstp)
 	resp->status = nlmsvc_unshare_file(host, file, argp);
 
 	dprintk("lockd: UNSHARE       status %d\n", ntohl(resp->status));
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rpc_success;
diff --git a/fs/lockd/svclock.c b/fs/lockd/svclock.c
index ea719cdd6a36..61d3cc2283dc 100644
--- a/fs/lockd/svclock.c
+++ b/fs/lockd/svclock.c
@@ -332,6 +332,93 @@ restart:
 	mutex_unlock(&file->f_mutex);
 }
 
+static struct nlm_lockowner *
+nlmsvc_get_lockowner(struct nlm_lockowner *lockowner)
+{
+	refcount_inc(&lockowner->count);
+	return lockowner;
+}
+
+static void nlmsvc_put_lockowner(struct nlm_lockowner *lockowner)
+{
+	if (!refcount_dec_and_lock(&lockowner->count, &lockowner->host->h_lock))
+		return;
+	list_del(&lockowner->list);
+	spin_unlock(&lockowner->host->h_lock);
+	nlmsvc_release_host(lockowner->host);
+	kfree(lockowner);
+}
+
+static struct nlm_lockowner *__nlmsvc_find_lockowner(struct nlm_host *host, pid_t pid)
+{
+	struct nlm_lockowner *lockowner;
+	list_for_each_entry(lockowner, &host->h_lockowners, list) {
+		if (lockowner->pid != pid)
+			continue;
+		return nlmsvc_get_lockowner(lockowner);
+	}
+	return NULL;
+}
+
+static struct nlm_lockowner *nlmsvc_find_lockowner(struct nlm_host *host, pid_t pid)
+{
+	struct nlm_lockowner *res, *new = NULL;
+
+	spin_lock(&host->h_lock);
+	res = __nlmsvc_find_lockowner(host, pid);
+
+	if (res == NULL) {
+		spin_unlock(&host->h_lock);
+		new = kmalloc(sizeof(*res), GFP_KERNEL);
+		spin_lock(&host->h_lock);
+		res = __nlmsvc_find_lockowner(host, pid);
+		if (res == NULL && new != NULL) {
+			res = new;
+			/* fs/locks.c will manage the refcount through lock_ops */
+			refcount_set(&new->count, 1);
+			new->pid = pid;
+			new->host = nlm_get_host(host);
+			list_add(&new->list, &host->h_lockowners);
+			new = NULL;
+		}
+	}
+
+	spin_unlock(&host->h_lock);
+	kfree(new);
+	return res;
+}
+
+void
+nlmsvc_release_lockowner(struct nlm_lock *lock)
+{
+	if (lock->fl.fl_owner)
+		nlmsvc_put_lockowner(lock->fl.fl_owner);
+}
+
+static void nlmsvc_locks_copy_lock(struct file_lock *new, struct file_lock *fl)
+{
+	struct nlm_lockowner *nlm_lo = (struct nlm_lockowner *)fl->fl_owner;
+	new->fl_owner = nlmsvc_get_lockowner(nlm_lo);
+}
+
+static void nlmsvc_locks_release_private(struct file_lock *fl)
+{
+	nlmsvc_put_lockowner((struct nlm_lockowner *)fl->fl_owner);
+}
+
+static const struct file_lock_operations nlmsvc_lock_ops = {
+	.fl_copy_lock = nlmsvc_locks_copy_lock,
+	.fl_release_private = nlmsvc_locks_release_private,
+};
+
+void nlmsvc_locks_init_private(struct file_lock *fl, struct nlm_host *host,
+						pid_t pid)
+{
+	fl->fl_owner = nlmsvc_find_lockowner(host, pid);
+	if (fl->fl_owner != NULL)
+		fl->fl_ops = &nlmsvc_lock_ops;
+}
+
 /*
  * Initialize arguments for GRANTED call. The nlm_rqst structure
  * has been cleared already.
@@ -345,7 +432,7 @@ static int nlmsvc_setgrantargs(struct nlm_rqst *call, struct nlm_lock *lock)
 
 	/* set default data area */
 	call->a_args.lock.oh.data = call->a_owner;
-	call->a_args.lock.svid = lock->fl.fl_pid;
+	call->a_args.lock.svid = ((struct nlm_lockowner *)lock->fl.fl_owner)->pid;
 
 	if (lock->oh.len > NLMCLNT_OHSIZE) {
 		void *data = kmalloc(lock->oh.len, GFP_KERNEL);
@@ -509,6 +596,7 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file,
 {
 	int			error;
 	__be32			ret;
+	struct nlm_lockowner	*test_owner;
 
 	dprintk("lockd: nlmsvc_testlock(%s/%ld, ty=%d, %Ld-%Ld)\n",
 				locks_inode(file->f_file)->i_sb->s_id,
@@ -522,6 +610,9 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file,
 		goto out;
 	}
 
+	/* If there's a conflicting lock, remember to clean up the test lock */
+	test_owner = (struct nlm_lockowner *)lock->fl.fl_owner;
+
 	error = vfs_test_lock(file->f_file, &lock->fl);
 	if (error) {
 		/* We can't currently deal with deferred test requests */
@@ -543,11 +634,16 @@ nlmsvc_testlock(struct svc_rqst *rqstp, struct nlm_file *file,
 	conflock->caller = "somehost";	/* FIXME */
 	conflock->len = strlen(conflock->caller);
 	conflock->oh.len = 0;		/* don't return OH info */
-	conflock->svid = lock->fl.fl_pid;
+	conflock->svid = ((struct nlm_lockowner *)lock->fl.fl_owner)->pid;
 	conflock->fl.fl_type = lock->fl.fl_type;
 	conflock->fl.fl_start = lock->fl.fl_start;
 	conflock->fl.fl_end = lock->fl.fl_end;
 	locks_release_private(&lock->fl);
+
+	/* Clean up the test lock */
+	lock->fl.fl_owner = NULL;
+	nlmsvc_put_lockowner(test_owner);
+
 	ret = nlm_lck_denied;
 out:
 	return ret;
@@ -692,25 +788,7 @@ nlmsvc_notify_blocked(struct file_lock *fl)
 	printk(KERN_WARNING "lockd: notification for unknown block!\n");
 }
 
-static int nlmsvc_same_owner(struct file_lock *fl1, struct file_lock *fl2)
-{
-	return fl1->fl_owner == fl2->fl_owner && fl1->fl_pid == fl2->fl_pid;
-}
-
-/*
- * Since NLM uses two "keys" for tracking locks, we need to hash them down
- * to one for the blocked_hash. Here, we're just xor'ing the host address
- * with the pid in order to create a key value for picking a hash bucket.
- */
-static unsigned long
-nlmsvc_owner_key(struct file_lock *fl)
-{
-	return (unsigned long)fl->fl_owner ^ (unsigned long)fl->fl_pid;
-}
-
 const struct lock_manager_operations nlmsvc_lock_operations = {
-	.lm_compare_owner = nlmsvc_same_owner,
-	.lm_owner_key = nlmsvc_owner_key,
 	.lm_notify = nlmsvc_notify_blocked,
 	.lm_grant = nlmsvc_grant_deferred,
 };
diff --git a/fs/lockd/svcproc.c b/fs/lockd/svcproc.c
index ea77c66d3cc3..d0bb7a6bf005 100644
--- a/fs/lockd/svcproc.c
+++ b/fs/lockd/svcproc.c
@@ -76,8 +76,14 @@ nlmsvc_retrieve_args(struct svc_rqst *rqstp, struct nlm_args *argp,
 
 		/* Set up the missing parts of the file_lock structure */
 		lock->fl.fl_file  = file->f_file;
-		lock->fl.fl_owner = (fl_owner_t) host;
+		lock->fl.fl_pid = current->tgid;
 		lock->fl.fl_lmops = &nlmsvc_lock_operations;
+		nlmsvc_locks_init_private(&lock->fl, host, (pid_t)lock->svid);
+		if (!lock->fl.fl_owner) {
+			/* lockowner allocation has failed */
+			nlmsvc_release_host(host);
+			return nlm_lck_denied_nolocks;
+		}
 	}
 
 	return 0;
@@ -125,6 +131,7 @@ __nlmsvc_proc_test(struct svc_rqst *rqstp, struct nlm_res *resp)
 		dprintk("lockd: TEST          status %d vers %d\n",
 			ntohl(resp->status), rqstp->rq_vers);
 
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rc;
@@ -173,6 +180,7 @@ __nlmsvc_proc_lock(struct svc_rqst *rqstp, struct nlm_res *resp)
 	else
 		dprintk("lockd: LOCK         status %d\n", ntohl(resp->status));
 
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rc;
@@ -210,6 +218,7 @@ __nlmsvc_proc_cancel(struct svc_rqst *rqstp, struct nlm_res *resp)
 	resp->status = cast_status(nlmsvc_cancel_blocked(net, file, &argp->lock));
 
 	dprintk("lockd: CANCEL        status %d\n", ntohl(resp->status));
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rpc_success;
@@ -250,6 +259,7 @@ __nlmsvc_proc_unlock(struct svc_rqst *rqstp, struct nlm_res *resp)
 	resp->status = cast_status(nlmsvc_unlock(net, file, &argp->lock));
 
 	dprintk("lockd: UNLOCK        status %d\n", ntohl(resp->status));
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rpc_success;
@@ -408,6 +418,7 @@ nlmsvc_proc_share(struct svc_rqst *rqstp)
 	resp->status = cast_status(nlmsvc_share_file(host, file, argp));
 
 	dprintk("lockd: SHARE         status %d\n", ntohl(resp->status));
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rpc_success;
@@ -442,6 +453,7 @@ nlmsvc_proc_unshare(struct svc_rqst *rqstp)
 	resp->status = cast_status(nlmsvc_unshare_file(host, file, argp));
 
 	dprintk("lockd: UNSHARE       status %d\n", ntohl(resp->status));
+	nlmsvc_release_lockowner(&argp->lock);
 	nlmsvc_release_host(host);
 	nlm_release_file(file);
 	return rpc_success;
diff --git a/fs/lockd/svcsubs.c b/fs/lockd/svcsubs.c
index 899360ba3b84..028fc152da22 100644
--- a/fs/lockd/svcsubs.c
+++ b/fs/lockd/svcsubs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/lockd/svcsubs.c
  *
@@ -179,7 +180,7 @@ again:
 		/* update current lock count */
 		file->f_locks++;
 
-		lockhost = (struct nlm_host *) fl->fl_owner;
+		lockhost = ((struct nlm_lockowner *)fl->fl_owner)->host;
 		if (match(lockhost, host)) {
 			struct file_lock lock = *fl;
 
diff --git a/fs/lockd/xdr.c b/fs/lockd/xdr.c
index 9846f7e95282..982629f7b120 100644
--- a/fs/lockd/xdr.c
+++ b/fs/lockd/xdr.c
@@ -126,8 +126,6 @@ nlm_decode_lock(__be32 *p, struct nlm_lock *lock)
 	lock->svid  = ntohl(*p++);
 
 	locks_init_lock(fl);
-	fl->fl_owner = current->files;
-	fl->fl_pid   = current->tgid;
 	fl->fl_flags = FL_POSIX;
 	fl->fl_type  = F_RDLCK;		/* as good as anything else */
 	start = ntohl(*p++);
@@ -269,7 +267,6 @@ nlmsvc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p)
 	memset(lock, 0, sizeof(*lock));
 	locks_init_lock(&lock->fl);
 	lock->svid = ~(u32) 0;
-	lock->fl.fl_pid = current->tgid;
 
 	if (!(p = nlm_decode_cookie(p, &argp->cookie))
 	 || !(p = xdr_decode_string_inplace(p, &lock->caller,
diff --git a/fs/lockd/xdr4.c b/fs/lockd/xdr4.c
index 70154f376695..5fa9f48a9dba 100644
--- a/fs/lockd/xdr4.c
+++ b/fs/lockd/xdr4.c
@@ -118,8 +118,6 @@ nlm4_decode_lock(__be32 *p, struct nlm_lock *lock)
 	lock->svid  = ntohl(*p++);
 
 	locks_init_lock(fl);
-	fl->fl_owner = current->files;
-	fl->fl_pid   = current->tgid;
 	fl->fl_flags = FL_POSIX;
 	fl->fl_type  = F_RDLCK;		/* as good as anything else */
 	p = xdr_decode_hyper(p, &start);
@@ -266,7 +264,6 @@ nlm4svc_decode_shareargs(struct svc_rqst *rqstp, __be32 *p)
 	memset(lock, 0, sizeof(*lock));
 	locks_init_lock(&lock->fl);
 	lock->svid = ~(u32) 0;
-	lock->fl.fl_pid = current->tgid;
 
 	if (!(p = nlm4_decode_cookie(p, &argp->cookie))
 	 || !(p = xdr_decode_string_inplace(p, &lock->caller,
diff --git a/fs/locks.c b/fs/locks.c
index ff6af2c32601..686eae21daf6 100644
--- a/fs/locks.c
+++ b/fs/locks.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/locks.c
  *
@@ -352,6 +353,12 @@ EXPORT_SYMBOL_GPL(locks_alloc_lock);
 
 void locks_release_private(struct file_lock *fl)
 {
+	BUG_ON(waitqueue_active(&fl->fl_wait));
+	BUG_ON(!list_empty(&fl->fl_list));
+	BUG_ON(!list_empty(&fl->fl_blocked_requests));
+	BUG_ON(!list_empty(&fl->fl_blocked_member));
+	BUG_ON(!hlist_unhashed(&fl->fl_link));
+
 	if (fl->fl_ops) {
 		if (fl->fl_ops->fl_release_private)
 			fl->fl_ops->fl_release_private(fl);
@@ -371,12 +378,6 @@ EXPORT_SYMBOL_GPL(locks_release_private);
 /* Free a lock which is not in use. */
 void locks_free_lock(struct file_lock *fl)
 {
-	BUG_ON(waitqueue_active(&fl->fl_wait));
-	BUG_ON(!list_empty(&fl->fl_list));
-	BUG_ON(!list_empty(&fl->fl_blocked_requests));
-	BUG_ON(!list_empty(&fl->fl_blocked_member));
-	BUG_ON(!hlist_unhashed(&fl->fl_link));
-
 	locks_release_private(fl);
 	kmem_cache_free(filelock_cache, fl);
 }
@@ -657,9 +658,6 @@ static inline int locks_overlap(struct file_lock *fl1, struct file_lock *fl2)
  */
 static int posix_same_owner(struct file_lock *fl1, struct file_lock *fl2)
 {
-	if (fl1->fl_lmops && fl1->fl_lmops->lm_compare_owner)
-		return fl2->fl_lmops == fl1->fl_lmops &&
-			fl1->fl_lmops->lm_compare_owner(fl1, fl2);
 	return fl1->fl_owner == fl2->fl_owner;
 }
 
@@ -700,8 +698,6 @@ static void locks_delete_global_locks(struct file_lock *fl)
 static unsigned long
 posix_owner_key(struct file_lock *fl)
 {
-	if (fl->fl_lmops && fl->fl_lmops->lm_owner_key)
-		return fl->fl_lmops->lm_owner_key(fl);
 	return (unsigned long)fl->fl_owner;
 }
 
@@ -1058,7 +1054,7 @@ static int flock_lock_inode(struct inode *inode, struct file_lock *request)
 			return -ENOMEM;
 	}
 
-	percpu_down_read_preempt_disable(&file_rwsem);
+	percpu_down_read(&file_rwsem);
 	spin_lock(&ctx->flc_lock);
 	if (request->fl_flags & FL_ACCESS)
 		goto find_conflict;
@@ -1100,7 +1096,7 @@ find_conflict:
 
 out:
 	spin_unlock(&ctx->flc_lock);
-	percpu_up_read_preempt_enable(&file_rwsem);
+	percpu_up_read(&file_rwsem);
 	if (new_fl)
 		locks_free_lock(new_fl);
 	locks_dispose_list(&dispose);
@@ -1138,7 +1134,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request,
 		new_fl2 = locks_alloc_lock();
 	}
 
-	percpu_down_read_preempt_disable(&file_rwsem);
+	percpu_down_read(&file_rwsem);
 	spin_lock(&ctx->flc_lock);
 	/*
 	 * New lock request. Walk all POSIX locks and look for conflicts. If
@@ -1160,6 +1156,11 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request,
 			 */
 			error = -EDEADLK;
 			spin_lock(&blocked_lock_lock);
+			/*
+			 * Ensure that we don't find any locks blocked on this
+			 * request during deadlock detection.
+			 */
+			__locks_wake_up_blocks(request);
 			if (likely(!posix_locks_deadlock(request, fl))) {
 				error = FILE_LOCK_DEFERRED;
 				__locks_insert_block(fl, request,
@@ -1312,7 +1313,7 @@ static int posix_lock_inode(struct inode *inode, struct file_lock *request,
 	}
  out:
 	spin_unlock(&ctx->flc_lock);
-	percpu_up_read_preempt_enable(&file_rwsem);
+	percpu_up_read(&file_rwsem);
 	/*
 	 * Free any unused locks.
 	 */
@@ -1471,7 +1472,7 @@ static void lease_clear_pending(struct file_lock *fl, int arg)
 	switch (arg) {
 	case F_UNLCK:
 		fl->fl_flags &= ~FL_UNLOCK_PENDING;
-		/* fall through: */
+		/* fall through */
 	case F_RDLCK:
 		fl->fl_flags &= ~FL_DOWNGRADE_PENDING;
 	}
@@ -1528,11 +1529,21 @@ static void time_out_leases(struct inode *inode, struct list_head *dispose)
 
 static bool leases_conflict(struct file_lock *lease, struct file_lock *breaker)
 {
-	if ((breaker->fl_flags & FL_LAYOUT) != (lease->fl_flags & FL_LAYOUT))
-		return false;
-	if ((breaker->fl_flags & FL_DELEG) && (lease->fl_flags & FL_LEASE))
-		return false;
-	return locks_conflict(breaker, lease);
+	bool rc;
+
+	if ((breaker->fl_flags & FL_LAYOUT) != (lease->fl_flags & FL_LAYOUT)) {
+		rc = false;
+		goto trace;
+	}
+	if ((breaker->fl_flags & FL_DELEG) && (lease->fl_flags & FL_LEASE)) {
+		rc = false;
+		goto trace;
+	}
+
+	rc = locks_conflict(breaker, lease);
+trace:
+	trace_leases_conflict(rc, lease, breaker);
+	return rc;
 }
 
 static bool
@@ -1584,7 +1595,7 @@ int __break_lease(struct inode *inode, unsigned int mode, unsigned int type)
 		return error;
 	}
 
-	percpu_down_read_preempt_disable(&file_rwsem);
+	percpu_down_read(&file_rwsem);
 	spin_lock(&ctx->flc_lock);
 
 	time_out_leases(inode, &dispose);
@@ -1636,13 +1647,13 @@ restart:
 	locks_insert_block(fl, new_fl, leases_conflict);
 	trace_break_lease_block(inode, new_fl);
 	spin_unlock(&ctx->flc_lock);
-	percpu_up_read_preempt_enable(&file_rwsem);
+	percpu_up_read(&file_rwsem);
 
 	locks_dispose_list(&dispose);
 	error = wait_event_interruptible_timeout(new_fl->fl_wait,
 						!new_fl->fl_blocker, break_time);
 
-	percpu_down_read_preempt_disable(&file_rwsem);
+	percpu_down_read(&file_rwsem);
 	spin_lock(&ctx->flc_lock);
 	trace_break_lease_unblock(inode, new_fl);
 	locks_delete_block(new_fl);
@@ -1659,7 +1670,7 @@ restart:
 	}
 out:
 	spin_unlock(&ctx->flc_lock);
-	percpu_up_read_preempt_enable(&file_rwsem);
+	percpu_up_read(&file_rwsem);
 	locks_dispose_list(&dispose);
 	locks_free_lock(new_fl);
 	return error;
@@ -1729,7 +1740,7 @@ int fcntl_getlease(struct file *filp)
 
 	ctx = smp_load_acquire(&inode->i_flctx);
 	if (ctx && !list_empty_careful(&ctx->flc_lease)) {
-		percpu_down_read_preempt_disable(&file_rwsem);
+		percpu_down_read(&file_rwsem);
 		spin_lock(&ctx->flc_lock);
 		time_out_leases(inode, &dispose);
 		list_for_each_entry(fl, &ctx->flc_lease, fl_list) {
@@ -1739,7 +1750,7 @@ int fcntl_getlease(struct file *filp)
 			break;
 		}
 		spin_unlock(&ctx->flc_lock);
-		percpu_up_read_preempt_enable(&file_rwsem);
+		percpu_up_read(&file_rwsem);
 
 		locks_dispose_list(&dispose);
 	}
@@ -1747,10 +1758,10 @@ int fcntl_getlease(struct file *filp)
 }
 
 /**
- * check_conflicting_open - see if the given dentry points to a file that has
+ * check_conflicting_open - see if the given file points to an inode that has
  *			    an existing open that would conflict with the
  *			    desired lease.
- * @dentry:	dentry to check
+ * @filp:	file to check
  * @arg:	type of lease that we're trying to acquire
  * @flags:	current lock flags
  *
@@ -1758,30 +1769,42 @@ int fcntl_getlease(struct file *filp)
  * conflict with the lease we're trying to set.
  */
 static int
-check_conflicting_open(const struct dentry *dentry, const long arg, int flags)
+check_conflicting_open(struct file *filp, const long arg, int flags)
 {
-	int ret = 0;
-	struct inode *inode = dentry->d_inode;
+	struct inode *inode = locks_inode(filp);
+	int self_wcount = 0, self_rcount = 0;
 
 	if (flags & FL_LAYOUT)
 		return 0;
 
-	if ((arg == F_RDLCK) && inode_is_open_for_write(inode))
-		return -EAGAIN;
+	if (arg == F_RDLCK)
+		return inode_is_open_for_write(inode) ? -EAGAIN : 0;
+	else if (arg != F_WRLCK)
+		return 0;
 
-	if ((arg == F_WRLCK) && ((d_count(dentry) > 1) ||
-	    (atomic_read(&inode->i_count) > 1)))
-		ret = -EAGAIN;
+	/*
+	 * Make sure that only read/write count is from lease requestor.
+	 * Note that this will result in denying write leases when i_writecount
+	 * is negative, which is what we want.  (We shouldn't grant write leases
+	 * on files open for execution.)
+	 */
+	if (filp->f_mode & FMODE_WRITE)
+		self_wcount = 1;
+	else if (filp->f_mode & FMODE_READ)
+		self_rcount = 1;
 
-	return ret;
+	if (atomic_read(&inode->i_writecount) != self_wcount ||
+	    atomic_read(&inode->i_readcount) != self_rcount)
+		return -EAGAIN;
+
+	return 0;
 }
 
 static int
 generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **priv)
 {
 	struct file_lock *fl, *my_fl = NULL, *lease;
-	struct dentry *dentry = filp->f_path.dentry;
-	struct inode *inode = dentry->d_inode;
+	struct inode *inode = locks_inode(filp);
 	struct file_lock_context *ctx;
 	bool is_deleg = (*flp)->fl_flags & FL_DELEG;
 	int error;
@@ -1813,10 +1836,10 @@ generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **pr
 		return -EINVAL;
 	}
 
-	percpu_down_read_preempt_disable(&file_rwsem);
+	percpu_down_read(&file_rwsem);
 	spin_lock(&ctx->flc_lock);
 	time_out_leases(inode, &dispose);
-	error = check_conflicting_open(dentry, arg, lease->fl_flags);
+	error = check_conflicting_open(filp, arg, lease->fl_flags);
 	if (error)
 		goto out;
 
@@ -1873,7 +1896,7 @@ generic_add_lease(struct file *filp, long arg, struct file_lock **flp, void **pr
 	 * precedes these checks.
 	 */
 	smp_mb();
-	error = check_conflicting_open(dentry, arg, lease->fl_flags);
+	error = check_conflicting_open(filp, arg, lease->fl_flags);
 	if (error) {
 		locks_unlink_lock_ctx(lease);
 		goto out;
@@ -1884,7 +1907,7 @@ out_setup:
 		lease->fl_lmops->lm_setup(lease, priv);
 out:
 	spin_unlock(&ctx->flc_lock);
-	percpu_up_read_preempt_enable(&file_rwsem);
+	percpu_up_read(&file_rwsem);
 	locks_dispose_list(&dispose);
 	if (is_deleg)
 		inode_unlock(inode);
@@ -1907,7 +1930,7 @@ static int generic_delete_lease(struct file *filp, void *owner)
 		return error;
 	}
 
-	percpu_down_read_preempt_disable(&file_rwsem);
+	percpu_down_read(&file_rwsem);
 	spin_lock(&ctx->flc_lock);
 	list_for_each_entry(fl, &ctx->flc_lease, fl_list) {
 		if (fl->fl_file == filp &&
@@ -1920,7 +1943,7 @@ static int generic_delete_lease(struct file *filp, void *owner)
 	if (victim)
 		error = fl->fl_lmops->lm_change(victim, F_UNLCK, &dispose);
 	spin_unlock(&ctx->flc_lock);
-	percpu_up_read_preempt_enable(&file_rwsem);
+	percpu_up_read(&file_rwsem);
 	locks_dispose_list(&dispose);
 	return error;
 }
@@ -2643,13 +2666,13 @@ locks_remove_lease(struct file *filp, struct file_lock_context *ctx)
 	if (list_empty(&ctx->flc_lease))
 		return;
 
-	percpu_down_read_preempt_disable(&file_rwsem);
+	percpu_down_read(&file_rwsem);
 	spin_lock(&ctx->flc_lock);
 	list_for_each_entry_safe(fl, tmp, &ctx->flc_lease, fl_list)
 		if (filp == fl->fl_file)
 			lease_modify(fl, F_UNLCK, &dispose);
 	spin_unlock(&ctx->flc_lock);
-	percpu_up_read_preempt_enable(&file_rwsem);
+	percpu_up_read(&file_rwsem);
 
 	locks_dispose_list(&dispose);
 }
diff --git a/fs/mbcache.c b/fs/mbcache.c
index 081ccf0caee3..97c54d3a2227 100644
--- a/fs/mbcache.c
+++ b/fs/mbcache.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <linux/spinlock.h>
 #include <linux/slab.h>
 #include <linux/list.h>
diff --git a/fs/minix/Kconfig b/fs/minix/Kconfig
index bcd53a79156f..de2003974ff0 100644
--- a/fs/minix/Kconfig
+++ b/fs/minix/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config MINIX_FS
 	tristate "Minix file system support"
 	depends on BLOCK
diff --git a/fs/minix/Makefile b/fs/minix/Makefile
index 3063015abfd0..a2d3ab58d187 100644
--- a/fs/minix/Makefile
+++ b/fs/minix/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux minix filesystem routines.
 #
diff --git a/fs/minix/inode.c b/fs/minix/inode.c
index 72e308c3e66b..f96073f25432 100644
--- a/fs/minix/inode.c
+++ b/fs/minix/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/minix/inode.c
  *
@@ -68,17 +69,11 @@ static struct inode *minix_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void minix_i_callback(struct rcu_head *head)
+static void minix_free_in_core_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(minix_inode_cachep, minix_i(inode));
 }
 
-static void minix_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, minix_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct minix_inode_info *ei = (struct minix_inode_info *) foo;
@@ -110,7 +105,7 @@ static void destroy_inodecache(void)
 
 static const struct super_operations minix_sops = {
 	.alloc_inode	= minix_alloc_inode,
-	.destroy_inode	= minix_destroy_inode,
+	.free_inode	= minix_free_in_core_inode,
 	.write_inode	= minix_write_inode,
 	.evict_inode	= minix_evict_inode,
 	.put_super	= minix_put_super,
diff --git a/fs/mount.h b/fs/mount.h
index f39bc9da4d73..6250de544760 100644
--- a/fs/mount.h
+++ b/fs/mount.h
@@ -146,3 +146,8 @@ static inline bool is_local_mountpoint(struct dentry *dentry)
 
 	return __is_local_mountpoint(dentry);
 }
+
+static inline bool is_anon_ns(struct mnt_namespace *ns)
+{
+	return ns->seq == 0;
+}
diff --git a/fs/mpage.c b/fs/mpage.c
index c820dc9bebab..436a85260394 100644
--- a/fs/mpage.c
+++ b/fs/mpage.c
@@ -47,9 +47,9 @@
 static void mpage_end_io(struct bio *bio)
 {
 	struct bio_vec *bv;
-	int i;
+	struct bvec_iter_all iter_all;
 
-	bio_for_each_segment_all(bv, bio, i) {
+	bio_for_each_segment_all(bv, bio, iter_all) {
 		struct page *page = bv->bv_page;
 		page_endio(page, bio_op(bio),
 			   blk_status_to_errno(bio->bi_status));
diff --git a/fs/namei.c b/fs/namei.c
index 914178cdbe94..209c51a5226c 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -39,7 +39,6 @@
 #include <linux/bitops.h>
 #include <linux/init_task.h>
 #include <linux/uaccess.h>
-#include <linux/build_bug.h>
 
 #include "internal.h"
 #include "mount.h"
@@ -131,7 +130,6 @@ getname_flags(const char __user *filename, int flags, int *empty)
 	struct filename *result;
 	char *kname;
 	int len;
-	BUILD_BUG_ON(offsetof(struct filename, iname) % sizeof(long) != 0);
 
 	result = audit_reusename(filename);
 	if (result)
@@ -1068,7 +1066,7 @@ const char *get_link(struct nameidata *nd)
 		return ERR_PTR(error);
 
 	nd->last_type = LAST_BIND;
-	res = inode->i_link;
+	res = READ_ONCE(inode->i_link);
 	if (!res) {
 		const char * (*get)(struct dentry *, struct inode *,
 				struct delayed_call *);
@@ -2333,8 +2331,8 @@ static int path_lookupat(struct nameidata *nd, unsigned flags, struct path *path
 	return err;
 }
 
-static int filename_lookup(int dfd, struct filename *name, unsigned flags,
-			   struct path *path, struct path *root)
+int filename_lookup(int dfd, struct filename *name, unsigned flags,
+		    struct path *path, struct path *root)
 {
 	int retval;
 	struct nameidata nd;
@@ -2720,7 +2718,7 @@ filename_mountpoint(int dfd, struct filename *name, struct path *path,
 	if (unlikely(error == -ESTALE))
 		error = path_mountpoint(&nd, flags | LOOKUP_REVAL, path);
 	if (likely(!error))
-		audit_inode(name, path->dentry, 0);
+		audit_inode(name, path->dentry, flags & LOOKUP_NO_EVAL);
 	restore_nameidata();
 	putname(name);
 	return error;
@@ -3462,6 +3460,7 @@ struct dentry *vfs_tmpfile(struct dentry *dentry, umode_t mode, int open_flag)
 		inode->i_state |= I_LINKABLE;
 		spin_unlock(&inode->i_lock);
 	}
+	ima_post_create_tmpfile(inode);
 	return child;
 
 out_err:
@@ -3884,6 +3883,7 @@ int vfs_rmdir(struct inode *dir, struct dentry *dentry)
 	dentry->d_inode->i_flags |= S_DEAD;
 	dont_mount(dentry);
 	detach_mounts(dentry);
+	fsnotify_rmdir(dir, dentry);
 
 out:
 	inode_unlock(dentry->d_inode);
@@ -4000,6 +4000,7 @@ int vfs_unlink(struct inode *dir, struct dentry *dentry, struct inode **delegate
 			if (!error) {
 				dont_mount(dentry);
 				detach_mounts(dentry);
+				fsnotify_unlink(dir, dentry);
 			}
 		}
 	}
@@ -4499,10 +4500,10 @@ out:
 		inode_unlock(target);
 	dput(new_dentry);
 	if (!error) {
-		fsnotify_move(old_dir, new_dir, old_name.name, is_dir,
+		fsnotify_move(old_dir, new_dir, &old_name.name, is_dir,
 			      !(flags & RENAME_EXCHANGE) ? target : NULL, old_dentry);
 		if (flags & RENAME_EXCHANGE) {
-			fsnotify_move(new_dir, old_dir, old_dentry->d_name.name,
+			fsnotify_move(new_dir, old_dir, &old_dentry->d_name,
 				      new_is_dir, NULL, new_dentry);
 		}
 	}
@@ -4730,7 +4731,7 @@ int vfs_readlink(struct dentry *dentry, char __user *buffer, int buflen)
 		spin_unlock(&inode->i_lock);
 	}
 
-	link = inode->i_link;
+	link = READ_ONCE(inode->i_link);
 	if (!link) {
 		link = inode->i_op->get_link(dentry, inode, &done);
 		if (IS_ERR(link))
diff --git a/fs/namespace.c b/fs/namespace.c
index a677b59efd74..6fbc9126367a 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -1,8 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/namespace.c
  *
  * (C) Copyright Al Viro 2000, 2001
- *	Released under GPL v2.
  *
  * Based on code from fs/super.c, copyright Linus Torvalds and others.
  * Heavily rewritten.
@@ -20,6 +20,7 @@
 #include <linux/init.h>		/* init_rootfs */
 #include <linux/fs_struct.h>	/* get_fs_root et.al. */
 #include <linux/fsnotify.h>	/* fsnotify_vfsmount_delete */
+#include <linux/file.h>
 #include <linux/uaccess.h>
 #include <linux/proc_ns.h>
 #include <linux/magic.h>
@@ -27,6 +28,7 @@
 #include <linux/task_work.h>
 #include <linux/sched/task.h>
 #include <uapi/linux/mount.h>
+#include <linux/fs_context.h>
 
 #include "pnode.h"
 #include "internal.h"
@@ -940,38 +942,81 @@ static struct mount *skip_mnt_tree(struct mount *p)
 	return p;
 }
 
-struct vfsmount *
-vfs_kern_mount(struct file_system_type *type, int flags, const char *name, void *data)
+/**
+ * vfs_create_mount - Create a mount for a configured superblock
+ * @fc: The configuration context with the superblock attached
+ *
+ * Create a mount to an already configured superblock.  If necessary, the
+ * caller should invoke vfs_get_tree() before calling this.
+ *
+ * Note that this does not attach the mount to anything.
+ */
+struct vfsmount *vfs_create_mount(struct fs_context *fc)
 {
 	struct mount *mnt;
-	struct dentry *root;
 
-	if (!type)
-		return ERR_PTR(-ENODEV);
+	if (!fc->root)
+		return ERR_PTR(-EINVAL);
 
-	mnt = alloc_vfsmnt(name);
+	mnt = alloc_vfsmnt(fc->source ?: "none");
 	if (!mnt)
 		return ERR_PTR(-ENOMEM);
 
-	if (flags & SB_KERNMOUNT)
+	if (fc->sb_flags & SB_KERNMOUNT)
 		mnt->mnt.mnt_flags = MNT_INTERNAL;
 
-	root = mount_fs(type, flags, name, data);
-	if (IS_ERR(root)) {
-		mnt_free_id(mnt);
-		free_vfsmnt(mnt);
-		return ERR_CAST(root);
-	}
+	atomic_inc(&fc->root->d_sb->s_active);
+	mnt->mnt.mnt_sb		= fc->root->d_sb;
+	mnt->mnt.mnt_root	= dget(fc->root);
+	mnt->mnt_mountpoint	= mnt->mnt.mnt_root;
+	mnt->mnt_parent		= mnt;
 
-	mnt->mnt.mnt_root = root;
-	mnt->mnt.mnt_sb = root->d_sb;
-	mnt->mnt_mountpoint = mnt->mnt.mnt_root;
-	mnt->mnt_parent = mnt;
 	lock_mount_hash();
-	list_add_tail(&mnt->mnt_instance, &root->d_sb->s_mounts);
+	list_add_tail(&mnt->mnt_instance, &mnt->mnt.mnt_sb->s_mounts);
 	unlock_mount_hash();
 	return &mnt->mnt;
 }
+EXPORT_SYMBOL(vfs_create_mount);
+
+struct vfsmount *fc_mount(struct fs_context *fc)
+{
+	int err = vfs_get_tree(fc);
+	if (!err) {
+		up_write(&fc->root->d_sb->s_umount);
+		return vfs_create_mount(fc);
+	}
+	return ERR_PTR(err);
+}
+EXPORT_SYMBOL(fc_mount);
+
+struct vfsmount *vfs_kern_mount(struct file_system_type *type,
+				int flags, const char *name,
+				void *data)
+{
+	struct fs_context *fc;
+	struct vfsmount *mnt;
+	int ret = 0;
+
+	if (!type)
+		return ERR_PTR(-EINVAL);
+
+	fc = fs_context_for_mount(type, flags);
+	if (IS_ERR(fc))
+		return ERR_CAST(fc);
+
+	if (name)
+		ret = vfs_parse_fs_string(fc, "source",
+					  name, strlen(name));
+	if (!ret)
+		ret = parse_monolithic_mount_data(fc, data);
+	if (!ret)
+		mnt = fc_mount(fc);
+	else
+		mnt = ERR_PTR(ret);
+
+	put_fs_context(fc);
+	return mnt;
+}
 EXPORT_SYMBOL_GPL(vfs_kern_mount);
 
 struct vfsmount *
@@ -1013,27 +1058,6 @@ static struct mount *clone_mnt(struct mount *old, struct dentry *root,
 
 	mnt->mnt.mnt_flags = old->mnt.mnt_flags;
 	mnt->mnt.mnt_flags &= ~(MNT_WRITE_HOLD|MNT_MARKED|MNT_INTERNAL);
-	/* Don't allow unprivileged users to change mount flags */
-	if (flag & CL_UNPRIVILEGED) {
-		mnt->mnt.mnt_flags |= MNT_LOCK_ATIME;
-
-		if (mnt->mnt.mnt_flags & MNT_READONLY)
-			mnt->mnt.mnt_flags |= MNT_LOCK_READONLY;
-
-		if (mnt->mnt.mnt_flags & MNT_NODEV)
-			mnt->mnt.mnt_flags |= MNT_LOCK_NODEV;
-
-		if (mnt->mnt.mnt_flags & MNT_NOSUID)
-			mnt->mnt.mnt_flags |= MNT_LOCK_NOSUID;
-
-		if (mnt->mnt.mnt_flags & MNT_NOEXEC)
-			mnt->mnt.mnt_flags |= MNT_LOCK_NOEXEC;
-	}
-
-	/* Don't allow unprivileged users to reveal what is under a mount */
-	if ((flag & CL_UNPRIVILEGED) &&
-	    (!(flag & CL_EXPIRE) || list_empty(&old->mnt_expire)))
-		mnt->mnt.mnt_flags |= MNT_LOCKED;
 
 	atomic_inc(&sb->s_active);
 	mnt->mnt.mnt_sb = sb;
@@ -1464,6 +1488,29 @@ static void umount_tree(struct mount *mnt, enum umount_tree_flags how)
 
 static void shrink_submounts(struct mount *mnt);
 
+static int do_umount_root(struct super_block *sb)
+{
+	int ret = 0;
+
+	down_write(&sb->s_umount);
+	if (!sb_rdonly(sb)) {
+		struct fs_context *fc;
+
+		fc = fs_context_for_reconfigure(sb->s_root, SB_RDONLY,
+						SB_RDONLY);
+		if (IS_ERR(fc)) {
+			ret = PTR_ERR(fc);
+		} else {
+			ret = parse_monolithic_mount_data(fc, NULL);
+			if (!ret)
+				ret = reconfigure_super(fc);
+			put_fs_context(fc);
+		}
+	}
+	up_write(&sb->s_umount);
+	return ret;
+}
+
 static int do_umount(struct mount *mnt, int flags)
 {
 	struct super_block *sb = mnt->mnt.mnt_sb;
@@ -1529,11 +1576,7 @@ static int do_umount(struct mount *mnt, int flags)
 		 */
 		if (!ns_capable(sb->s_user_ns, CAP_SYS_ADMIN))
 			return -EPERM;
-		down_write(&sb->s_umount);
-		if (!sb_rdonly(sb))
-			retval = do_remount_sb(sb, SB_RDONLY, NULL, 0);
-		up_write(&sb->s_umount);
-		return retval;
+		return do_umount_root(sb);
 	}
 
 	namespace_lock();
@@ -1640,6 +1683,8 @@ int ksys_umount(char __user *name, int flags)
 	if (!(flags & UMOUNT_NOFOLLOW))
 		lookup_flags |= LOOKUP_FOLLOW;
 
+	lookup_flags |= LOOKUP_NO_EVAL;
+
 	retval = user_path_mountpoint_at(AT_FDCWD, name, lookup_flags, &path);
 	if (retval)
 		goto out;
@@ -1788,6 +1833,27 @@ struct vfsmount *collect_mounts(const struct path *path)
 	return &tree->mnt;
 }
 
+static void free_mnt_ns(struct mnt_namespace *);
+static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *, bool);
+
+void dissolve_on_fput(struct vfsmount *mnt)
+{
+	struct mnt_namespace *ns;
+	namespace_lock();
+	lock_mount_hash();
+	ns = real_mount(mnt)->mnt_ns;
+	if (ns) {
+		if (is_anon_ns(ns))
+			umount_tree(real_mount(mnt), UMOUNT_CONNECTED);
+		else
+			ns = NULL;
+	}
+	unlock_mount_hash();
+	namespace_unlock();
+	if (ns)
+		free_mnt_ns(ns);
+}
+
 void drop_collected_mounts(struct vfsmount *mnt)
 {
 	namespace_lock();
@@ -1837,6 +1903,33 @@ int iterate_mounts(int (*f)(struct vfsmount *, void *), void *arg,
 	return 0;
 }
 
+static void lock_mnt_tree(struct mount *mnt)
+{
+	struct mount *p;
+
+	for (p = mnt; p; p = next_mnt(p, mnt)) {
+		int flags = p->mnt.mnt_flags;
+		/* Don't allow unprivileged users to change mount flags */
+		flags |= MNT_LOCK_ATIME;
+
+		if (flags & MNT_READONLY)
+			flags |= MNT_LOCK_READONLY;
+
+		if (flags & MNT_NODEV)
+			flags |= MNT_LOCK_NODEV;
+
+		if (flags & MNT_NOSUID)
+			flags |= MNT_LOCK_NOSUID;
+
+		if (flags & MNT_NOEXEC)
+			flags |= MNT_LOCK_NOEXEC;
+		/* Don't allow unprivileged users to reveal what is under a mount */
+		if (list_empty(&p->mnt_expire))
+			flags |= MNT_LOCKED;
+		p->mnt.mnt_flags = flags;
+	}
+}
+
 static void cleanup_group_ids(struct mount *mnt, struct mount *end)
 {
 	struct mount *p;
@@ -1954,6 +2047,7 @@ static int attach_recursive_mnt(struct mount *source_mnt,
 			struct mountpoint *dest_mp,
 			struct path *parent_path)
 {
+	struct user_namespace *user_ns = current->nsproxy->mnt_ns->user_ns;
 	HLIST_HEAD(tree_list);
 	struct mnt_namespace *ns = dest_mnt->mnt_ns;
 	struct mountpoint *smp;
@@ -1993,6 +2087,10 @@ static int attach_recursive_mnt(struct mount *source_mnt,
 		attach_mnt(source_mnt, dest_mnt, dest_mp);
 		touch_mnt_namespace(source_mnt->mnt_ns);
 	} else {
+		if (source_mnt->mnt_ns) {
+			/* move from anon - the caller will destroy */
+			list_del_init(&source_mnt->mnt_ns->list);
+		}
 		mnt_set_mountpoint(dest_mnt, dest_mp, source_mnt);
 		commit_tree(source_mnt);
 	}
@@ -2004,6 +2102,10 @@ static int attach_recursive_mnt(struct mount *source_mnt,
 				 child->mnt_mountpoint);
 		if (q)
 			mnt_change_mountpoint(child, smp, q);
+		/* Notice when we are propagating across user namespaces */
+		if (child->mnt_parent->mnt_ns->user_ns != user_ns)
+			lock_mnt_tree(child);
+		child->mnt.mnt_flags &= ~MNT_LOCKED;
 		commit_tree(child);
 	}
 	put_mountpoint(smp);
@@ -2147,6 +2249,30 @@ static bool has_locked_children(struct mount *mnt, struct dentry *dentry)
 	return false;
 }
 
+static struct mount *__do_loopback(struct path *old_path, int recurse)
+{
+	struct mount *mnt = ERR_PTR(-EINVAL), *old = real_mount(old_path->mnt);
+
+	if (IS_MNT_UNBINDABLE(old))
+		return mnt;
+
+	if (!check_mnt(old) && old_path->dentry->d_op != &ns_dentry_operations)
+		return mnt;
+
+	if (!recurse && has_locked_children(old, old_path->dentry))
+		return mnt;
+
+	if (recurse)
+		mnt = copy_tree(old, old_path->dentry, CL_COPY_MNT_NS_FILE);
+	else
+		mnt = clone_mnt(old, old_path->dentry, 0);
+
+	if (!IS_ERR(mnt))
+		mnt->mnt.mnt_flags &= ~MNT_LOCKED;
+
+	return mnt;
+}
+
 /*
  * do loopback mount.
  */
@@ -2154,7 +2280,7 @@ static int do_loopback(struct path *path, const char *old_name,
 				int recurse)
 {
 	struct path old_path;
-	struct mount *mnt = NULL, *old, *parent;
+	struct mount *mnt = NULL, *parent;
 	struct mountpoint *mp;
 	int err;
 	if (!old_name || !*old_name)
@@ -2168,38 +2294,21 @@ static int do_loopback(struct path *path, const char *old_name,
 		goto out;
 
 	mp = lock_mount(path);
-	err = PTR_ERR(mp);
-	if (IS_ERR(mp))
+	if (IS_ERR(mp)) {
+		err = PTR_ERR(mp);
 		goto out;
+	}
 
-	old = real_mount(old_path.mnt);
 	parent = real_mount(path->mnt);
-
-	err = -EINVAL;
-	if (IS_MNT_UNBINDABLE(old))
-		goto out2;
-
 	if (!check_mnt(parent))
 		goto out2;
 
-	if (!check_mnt(old) && old_path.dentry->d_op != &ns_dentry_operations)
-		goto out2;
-
-	if (!recurse && has_locked_children(old, old_path.dentry))
-		goto out2;
-
-	if (recurse)
-		mnt = copy_tree(old, old_path.dentry, CL_COPY_MNT_NS_FILE);
-	else
-		mnt = clone_mnt(old, old_path.dentry, 0);
-
+	mnt = __do_loopback(&old_path, recurse);
 	if (IS_ERR(mnt)) {
 		err = PTR_ERR(mnt);
 		goto out2;
 	}
 
-	mnt->mnt.mnt_flags &= ~MNT_LOCKED;
-
 	err = graft_tree(mnt, parent, mp);
 	if (err) {
 		lock_mount_hash();
@@ -2213,6 +2322,96 @@ out:
 	return err;
 }
 
+static struct file *open_detached_copy(struct path *path, bool recursive)
+{
+	struct user_namespace *user_ns = current->nsproxy->mnt_ns->user_ns;
+	struct mnt_namespace *ns = alloc_mnt_ns(user_ns, true);
+	struct mount *mnt, *p;
+	struct file *file;
+
+	if (IS_ERR(ns))
+		return ERR_CAST(ns);
+
+	namespace_lock();
+	mnt = __do_loopback(path, recursive);
+	if (IS_ERR(mnt)) {
+		namespace_unlock();
+		free_mnt_ns(ns);
+		return ERR_CAST(mnt);
+	}
+
+	lock_mount_hash();
+	for (p = mnt; p; p = next_mnt(p, mnt)) {
+		p->mnt_ns = ns;
+		ns->mounts++;
+	}
+	ns->root = mnt;
+	list_add_tail(&ns->list, &mnt->mnt_list);
+	mntget(&mnt->mnt);
+	unlock_mount_hash();
+	namespace_unlock();
+
+	mntput(path->mnt);
+	path->mnt = &mnt->mnt;
+	file = dentry_open(path, O_PATH, current_cred());
+	if (IS_ERR(file))
+		dissolve_on_fput(path->mnt);
+	else
+		file->f_mode |= FMODE_NEED_UNMOUNT;
+	return file;
+}
+
+SYSCALL_DEFINE3(open_tree, int, dfd, const char *, filename, unsigned, flags)
+{
+	struct file *file;
+	struct path path;
+	int lookup_flags = LOOKUP_AUTOMOUNT | LOOKUP_FOLLOW;
+	bool detached = flags & OPEN_TREE_CLONE;
+	int error;
+	int fd;
+
+	BUILD_BUG_ON(OPEN_TREE_CLOEXEC != O_CLOEXEC);
+
+	if (flags & ~(AT_EMPTY_PATH | AT_NO_AUTOMOUNT | AT_RECURSIVE |
+		      AT_SYMLINK_NOFOLLOW | OPEN_TREE_CLONE |
+		      OPEN_TREE_CLOEXEC))
+		return -EINVAL;
+
+	if ((flags & (AT_RECURSIVE | OPEN_TREE_CLONE)) == AT_RECURSIVE)
+		return -EINVAL;
+
+	if (flags & AT_NO_AUTOMOUNT)
+		lookup_flags &= ~LOOKUP_AUTOMOUNT;
+	if (flags & AT_SYMLINK_NOFOLLOW)
+		lookup_flags &= ~LOOKUP_FOLLOW;
+	if (flags & AT_EMPTY_PATH)
+		lookup_flags |= LOOKUP_EMPTY;
+
+	if (detached && !may_mount())
+		return -EPERM;
+
+	fd = get_unused_fd_flags(flags & O_CLOEXEC);
+	if (fd < 0)
+		return fd;
+
+	error = user_path_at(dfd, filename, lookup_flags, &path);
+	if (unlikely(error)) {
+		file = ERR_PTR(error);
+	} else {
+		if (detached)
+			file = open_detached_copy(&path, flags & AT_RECURSIVE);
+		else
+			file = dentry_open(&path, O_PATH, current_cred());
+		path_put(&path);
+	}
+	if (IS_ERR(file)) {
+		put_unused_fd(fd);
+		return PTR_ERR(file);
+	}
+	fd_install(fd, file);
+	return fd;
+}
+
 /*
  * Don't allow locked mount flags to be cleared.
  *
@@ -2311,7 +2510,7 @@ static int do_remount(struct path *path, int ms_flags, int sb_flags,
 	int err;
 	struct super_block *sb = path->mnt->mnt_sb;
 	struct mount *mnt = real_mount(path->mnt);
-	void *sec_opts = NULL;
+	struct fs_context *fc;
 
 	if (!check_mnt(mnt))
 		return -EINVAL;
@@ -2322,24 +2521,22 @@ static int do_remount(struct path *path, int ms_flags, int sb_flags,
 	if (!can_change_locked_flags(mnt, mnt_flags))
 		return -EPERM;
 
-	if (data && !(sb->s_type->fs_flags & FS_BINARY_MOUNTDATA)) {
-		err = security_sb_eat_lsm_opts(data, &sec_opts);
-		if (err)
-			return err;
-	}
-	err = security_sb_remount(sb, sec_opts);
-	security_free_mnt_opts(&sec_opts);
-	if (err)
-		return err;
+	fc = fs_context_for_reconfigure(path->dentry, sb_flags, MS_RMT_MASK);
+	if (IS_ERR(fc))
+		return PTR_ERR(fc);
 
-	down_write(&sb->s_umount);
-	err = -EPERM;
-	if (ns_capable(sb->s_user_ns, CAP_SYS_ADMIN)) {
-		err = do_remount_sb(sb, sb_flags, data, 0);
-		if (!err)
-			set_mount_attributes(mnt, mnt_flags);
+	err = parse_monolithic_mount_data(fc, data);
+	if (!err) {
+		down_write(&sb->s_umount);
+		err = -EPERM;
+		if (ns_capable(sb->s_user_ns, CAP_SYS_ADMIN)) {
+			err = reconfigure_super(fc);
+			if (!err)
+				set_mount_attributes(mnt, mnt_flags);
+		}
+		up_write(&sb->s_umount);
 	}
-	up_write(&sb->s_umount);
+	put_fs_context(fc);
 	return err;
 }
 
@@ -2353,97 +2550,120 @@ static inline int tree_contains_unbindable(struct mount *mnt)
 	return 0;
 }
 
-static int do_move_mount(struct path *path, const char *old_name)
+/*
+ * Check that there aren't references to earlier/same mount namespaces in the
+ * specified subtree.  Such references can act as pins for mount namespaces
+ * that aren't checked by the mount-cycle checking code, thereby allowing
+ * cycles to be made.
+ */
+static bool check_for_nsfs_mounts(struct mount *subtree)
+{
+	struct mount *p;
+	bool ret = false;
+
+	lock_mount_hash();
+	for (p = subtree; p; p = next_mnt(p, subtree))
+		if (mnt_ns_loop(p->mnt.mnt_root))
+			goto out;
+
+	ret = true;
+out:
+	unlock_mount_hash();
+	return ret;
+}
+
+static int do_move_mount(struct path *old_path, struct path *new_path)
 {
-	struct path old_path, parent_path;
+	struct path parent_path = {.mnt = NULL, .dentry = NULL};
+	struct mnt_namespace *ns;
 	struct mount *p;
 	struct mount *old;
 	struct mountpoint *mp;
 	int err;
-	if (!old_name || !*old_name)
-		return -EINVAL;
-	err = kern_path(old_name, LOOKUP_FOLLOW, &old_path);
-	if (err)
-		return err;
+	bool attached;
 
-	mp = lock_mount(path);
-	err = PTR_ERR(mp);
+	mp = lock_mount(new_path);
 	if (IS_ERR(mp))
-		goto out;
+		return PTR_ERR(mp);
 
-	old = real_mount(old_path.mnt);
-	p = real_mount(path->mnt);
+	old = real_mount(old_path->mnt);
+	p = real_mount(new_path->mnt);
+	attached = mnt_has_parent(old);
+	ns = old->mnt_ns;
 
 	err = -EINVAL;
-	if (!check_mnt(p) || !check_mnt(old))
-		goto out1;
+	/* The mountpoint must be in our namespace. */
+	if (!check_mnt(p))
+		goto out;
 
-	if (old->mnt.mnt_flags & MNT_LOCKED)
-		goto out1;
+	/* The thing moved must be mounted... */
+	if (!is_mounted(&old->mnt))
+		goto out;
 
-	err = -EINVAL;
-	if (old_path.dentry != old_path.mnt->mnt_root)
-		goto out1;
+	/* ... and either ours or the root of anon namespace */
+	if (!(attached ? check_mnt(old) : is_anon_ns(ns)))
+		goto out;
 
-	if (!mnt_has_parent(old))
-		goto out1;
+	if (old->mnt.mnt_flags & MNT_LOCKED)
+		goto out;
 
-	if (d_is_dir(path->dentry) !=
-	      d_is_dir(old_path.dentry))
-		goto out1;
+	if (old_path->dentry != old_path->mnt->mnt_root)
+		goto out;
+
+	if (d_is_dir(new_path->dentry) !=
+	    d_is_dir(old_path->dentry))
+		goto out;
 	/*
 	 * Don't move a mount residing in a shared parent.
 	 */
-	if (IS_MNT_SHARED(old->mnt_parent))
-		goto out1;
+	if (attached && IS_MNT_SHARED(old->mnt_parent))
+		goto out;
 	/*
 	 * Don't move a mount tree containing unbindable mounts to a destination
 	 * mount which is shared.
 	 */
 	if (IS_MNT_SHARED(p) && tree_contains_unbindable(old))
-		goto out1;
+		goto out;
 	err = -ELOOP;
+	if (!check_for_nsfs_mounts(old))
+		goto out;
 	for (; mnt_has_parent(p); p = p->mnt_parent)
 		if (p == old)
-			goto out1;
+			goto out;
 
-	err = attach_recursive_mnt(old, real_mount(path->mnt), mp, &parent_path);
+	err = attach_recursive_mnt(old, real_mount(new_path->mnt), mp,
+				   attached ? &parent_path : NULL);
 	if (err)
-		goto out1;
+		goto out;
 
 	/* if the mount is moved, it should no longer be expire
 	 * automatically */
 	list_del_init(&old->mnt_expire);
-out1:
-	unlock_mount(mp);
 out:
-	if (!err)
+	unlock_mount(mp);
+	if (!err) {
 		path_put(&parent_path);
-	path_put(&old_path);
+		if (!attached)
+			free_mnt_ns(ns);
+	}
 	return err;
 }
 
-static struct vfsmount *fs_set_subtype(struct vfsmount *mnt, const char *fstype)
+static int do_move_mount_old(struct path *path, const char *old_name)
 {
+	struct path old_path;
 	int err;
-	const char *subtype = strchr(fstype, '.');
-	if (subtype) {
-		subtype++;
-		err = -EINVAL;
-		if (!subtype[0])
-			goto err;
-	} else
-		subtype = "";
-
-	mnt->mnt_sb->s_subtype = kstrdup(subtype, GFP_KERNEL);
-	err = -ENOMEM;
-	if (!mnt->mnt_sb->s_subtype)
-		goto err;
-	return mnt;
 
- err:
-	mntput(mnt);
-	return ERR_PTR(err);
+	if (!old_name || !*old_name)
+		return -EINVAL;
+
+	err = kern_path(old_name, LOOKUP_FOLLOW, &old_path);
+	if (err)
+		return err;
+
+	err = do_move_mount(&old_path, path);
+	path_put(&old_path);
+	return err;
 }
 
 /*
@@ -2490,7 +2710,39 @@ unlock:
 	return err;
 }
 
-static bool mount_too_revealing(struct vfsmount *mnt, int *new_mnt_flags);
+static bool mount_too_revealing(const struct super_block *sb, int *new_mnt_flags);
+
+/*
+ * Create a new mount using a superblock configuration and request it
+ * be added to the namespace tree.
+ */
+static int do_new_mount_fc(struct fs_context *fc, struct path *mountpoint,
+			   unsigned int mnt_flags)
+{
+	struct vfsmount *mnt;
+	struct super_block *sb = fc->root->d_sb;
+	int error;
+
+	error = security_sb_kern_mount(sb);
+	if (!error && mount_too_revealing(sb, &mnt_flags))
+		error = -EPERM;
+
+	if (unlikely(error)) {
+		fc_drop_locked(fc);
+		return error;
+	}
+
+	up_write(&sb->s_umount);
+
+	mnt = vfs_create_mount(fc);
+	if (IS_ERR(mnt))
+		return PTR_ERR(mnt);
+
+	error = do_add_mount(real_mount(mnt), mountpoint, mnt_flags);
+	if (error < 0)
+		mntput(mnt);
+	return error;
+}
 
 /*
  * create a new mount for userspace and request it to be added into the
@@ -2500,8 +2752,9 @@ static int do_new_mount(struct path *path, const char *fstype, int sb_flags,
 			int mnt_flags, const char *name, void *data)
 {
 	struct file_system_type *type;
-	struct vfsmount *mnt;
-	int err;
+	struct fs_context *fc;
+	const char *subtype = NULL;
+	int err = 0;
 
 	if (!fstype)
 		return -EINVAL;
@@ -2510,23 +2763,37 @@ static int do_new_mount(struct path *path, const char *fstype, int sb_flags,
 	if (!type)
 		return -ENODEV;
 
-	mnt = vfs_kern_mount(type, sb_flags, name, data);
-	if (!IS_ERR(mnt) && (type->fs_flags & FS_HAS_SUBTYPE) &&
-	    !mnt->mnt_sb->s_subtype)
-		mnt = fs_set_subtype(mnt, fstype);
+	if (type->fs_flags & FS_HAS_SUBTYPE) {
+		subtype = strchr(fstype, '.');
+		if (subtype) {
+			subtype++;
+			if (!*subtype) {
+				put_filesystem(type);
+				return -EINVAL;
+			}
+		} else {
+			subtype = "";
+		}
+	}
 
+	fc = fs_context_for_mount(type, sb_flags);
 	put_filesystem(type);
-	if (IS_ERR(mnt))
-		return PTR_ERR(mnt);
-
-	if (mount_too_revealing(mnt, &mnt_flags)) {
-		mntput(mnt);
-		return -EPERM;
-	}
+	if (IS_ERR(fc))
+		return PTR_ERR(fc);
+
+	if (subtype)
+		err = vfs_parse_fs_string(fc, "subtype",
+					  subtype, strlen(subtype));
+	if (!err && name)
+		err = vfs_parse_fs_string(fc, "source", name, strlen(name));
+	if (!err)
+		err = parse_monolithic_mount_data(fc, data);
+	if (!err)
+		err = vfs_get_tree(fc);
+	if (!err)
+		err = do_new_mount_fc(fc, path, mnt_flags);
 
-	err = do_add_mount(real_mount(mnt), path, mnt_flags);
-	if (err)
-		mntput(mnt);
+	put_fs_context(fc);
 	return err;
 }
 
@@ -2698,7 +2965,6 @@ static long exact_copy_from_user(void *to, const void __user * from,
 	if (!access_ok(from, n))
 		return n;
 
-	current->kernel_uaccess_faults_ok++;
 	while (n) {
 		if (__get_user(c, f)) {
 			memset(t, 0, n);
@@ -2708,7 +2974,6 @@ static long exact_copy_from_user(void *to, const void __user * from,
 		f++;
 		n--;
 	}
-	current->kernel_uaccess_faults_ok--;
 	return n;
 }
 
@@ -2746,7 +3011,7 @@ void *copy_mount_options(const void __user * data)
 
 char *copy_mount_string(const void __user *data)
 {
-	return data ? strndup_user(data, PAGE_SIZE) : NULL;
+	return data ? strndup_user(data, PATH_MAX) : NULL;
 }
 
 /*
@@ -2842,7 +3107,7 @@ long do_mount(const char *dev_name, const char __user *dir_name,
 	else if (flags & (MS_SHARED | MS_PRIVATE | MS_SLAVE | MS_UNBINDABLE))
 		retval = do_change_type(&path, flags);
 	else if (flags & MS_MOVE)
-		retval = do_move_mount(&path, dev_name);
+		retval = do_move_mount_old(&path, dev_name);
 	else
 		retval = do_new_mount(&path, type_page, sb_flags, mnt_flags,
 				      dev_name, data_page);
@@ -2863,7 +3128,8 @@ static void dec_mnt_namespaces(struct ucounts *ucounts)
 
 static void free_mnt_ns(struct mnt_namespace *ns)
 {
-	ns_free_inum(&ns->ns);
+	if (!is_anon_ns(ns))
+		ns_free_inum(&ns->ns);
 	dec_mnt_namespaces(ns->ucounts);
 	put_user_ns(ns->user_ns);
 	kfree(ns);
@@ -2878,7 +3144,7 @@ static void free_mnt_ns(struct mnt_namespace *ns)
  */
 static atomic64_t mnt_ns_seq = ATOMIC64_INIT(1);
 
-static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *user_ns)
+static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *user_ns, bool anon)
 {
 	struct mnt_namespace *new_ns;
 	struct ucounts *ucounts;
@@ -2888,28 +3154,27 @@ static struct mnt_namespace *alloc_mnt_ns(struct user_namespace *user_ns)
 	if (!ucounts)
 		return ERR_PTR(-ENOSPC);
 
-	new_ns = kmalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
+	new_ns = kzalloc(sizeof(struct mnt_namespace), GFP_KERNEL);
 	if (!new_ns) {
 		dec_mnt_namespaces(ucounts);
 		return ERR_PTR(-ENOMEM);
 	}
-	ret = ns_alloc_inum(&new_ns->ns);
-	if (ret) {
-		kfree(new_ns);
-		dec_mnt_namespaces(ucounts);
-		return ERR_PTR(ret);
+	if (!anon) {
+		ret = ns_alloc_inum(&new_ns->ns);
+		if (ret) {
+			kfree(new_ns);
+			dec_mnt_namespaces(ucounts);
+			return ERR_PTR(ret);
+		}
 	}
 	new_ns->ns.ops = &mntns_operations;
-	new_ns->seq = atomic64_add_return(1, &mnt_ns_seq);
+	if (!anon)
+		new_ns->seq = atomic64_add_return(1, &mnt_ns_seq);
 	atomic_set(&new_ns->count, 1);
-	new_ns->root = NULL;
 	INIT_LIST_HEAD(&new_ns->list);
 	init_waitqueue_head(&new_ns->poll);
-	new_ns->event = 0;
 	new_ns->user_ns = get_user_ns(user_ns);
 	new_ns->ucounts = ucounts;
-	new_ns->mounts = 0;
-	new_ns->pending_mounts = 0;
 	return new_ns;
 }
 
@@ -2933,7 +3198,7 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
 
 	old = ns->root;
 
-	new_ns = alloc_mnt_ns(user_ns);
+	new_ns = alloc_mnt_ns(user_ns, false);
 	if (IS_ERR(new_ns))
 		return new_ns;
 
@@ -2941,13 +3206,18 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
 	/* First pass: copy the tree topology */
 	copy_flags = CL_COPY_UNBINDABLE | CL_EXPIRE;
 	if (user_ns != ns->user_ns)
-		copy_flags |= CL_SHARED_TO_SLAVE | CL_UNPRIVILEGED;
+		copy_flags |= CL_SHARED_TO_SLAVE;
 	new = copy_tree(old, old->mnt.mnt_root, copy_flags);
 	if (IS_ERR(new)) {
 		namespace_unlock();
 		free_mnt_ns(new_ns);
 		return ERR_CAST(new);
 	}
+	if (user_ns != ns->user_ns) {
+		lock_mount_hash();
+		lock_mnt_tree(new);
+		unlock_mount_hash();
+	}
 	new_ns->root = new;
 	list_add_tail(&new_ns->list, &new->mnt_list);
 
@@ -2988,37 +3258,25 @@ struct mnt_namespace *copy_mnt_ns(unsigned long flags, struct mnt_namespace *ns,
 	return new_ns;
 }
 
-/**
- * create_mnt_ns - creates a private namespace and adds a root filesystem
- * @mnt: pointer to the new root filesystem mountpoint
- */
-static struct mnt_namespace *create_mnt_ns(struct vfsmount *m)
-{
-	struct mnt_namespace *new_ns = alloc_mnt_ns(&init_user_ns);
-	if (!IS_ERR(new_ns)) {
-		struct mount *mnt = real_mount(m);
-		mnt->mnt_ns = new_ns;
-		new_ns->root = mnt;
-		new_ns->mounts++;
-		list_add(&mnt->mnt_list, &new_ns->list);
-	} else {
-		mntput(m);
-	}
-	return new_ns;
-}
-
-struct dentry *mount_subtree(struct vfsmount *mnt, const char *name)
+struct dentry *mount_subtree(struct vfsmount *m, const char *name)
 {
+	struct mount *mnt = real_mount(m);
 	struct mnt_namespace *ns;
 	struct super_block *s;
 	struct path path;
 	int err;
 
-	ns = create_mnt_ns(mnt);
-	if (IS_ERR(ns))
+	ns = alloc_mnt_ns(&init_user_ns, true);
+	if (IS_ERR(ns)) {
+		mntput(m);
 		return ERR_CAST(ns);
+	}
+	mnt->mnt_ns = ns;
+	ns->root = mnt;
+	ns->mounts++;
+	list_add(&mnt->mnt_list, &ns->list);
 
-	err = vfs_path_lookup(mnt->mnt_root, mnt,
+	err = vfs_path_lookup(m->mnt_root, m,
 			name, LOOKUP_FOLLOW|LOOKUP_AUTOMOUNT, &path);
 
 	put_mnt_ns(ns);
@@ -3078,6 +3336,204 @@ SYSCALL_DEFINE5(mount, char __user *, dev_name, char __user *, dir_name,
 }
 
 /*
+ * Create a kernel mount representation for a new, prepared superblock
+ * (specified by fs_fd) and attach to an open_tree-like file descriptor.
+ */
+SYSCALL_DEFINE3(fsmount, int, fs_fd, unsigned int, flags,
+		unsigned int, attr_flags)
+{
+	struct mnt_namespace *ns;
+	struct fs_context *fc;
+	struct file *file;
+	struct path newmount;
+	struct mount *mnt;
+	struct fd f;
+	unsigned int mnt_flags = 0;
+	long ret;
+
+	if (!may_mount())
+		return -EPERM;
+
+	if ((flags & ~(FSMOUNT_CLOEXEC)) != 0)
+		return -EINVAL;
+
+	if (attr_flags & ~(MOUNT_ATTR_RDONLY |
+			   MOUNT_ATTR_NOSUID |
+			   MOUNT_ATTR_NODEV |
+			   MOUNT_ATTR_NOEXEC |
+			   MOUNT_ATTR__ATIME |
+			   MOUNT_ATTR_NODIRATIME))
+		return -EINVAL;
+
+	if (attr_flags & MOUNT_ATTR_RDONLY)
+		mnt_flags |= MNT_READONLY;
+	if (attr_flags & MOUNT_ATTR_NOSUID)
+		mnt_flags |= MNT_NOSUID;
+	if (attr_flags & MOUNT_ATTR_NODEV)
+		mnt_flags |= MNT_NODEV;
+	if (attr_flags & MOUNT_ATTR_NOEXEC)
+		mnt_flags |= MNT_NOEXEC;
+	if (attr_flags & MOUNT_ATTR_NODIRATIME)
+		mnt_flags |= MNT_NODIRATIME;
+
+	switch (attr_flags & MOUNT_ATTR__ATIME) {
+	case MOUNT_ATTR_STRICTATIME:
+		break;
+	case MOUNT_ATTR_NOATIME:
+		mnt_flags |= MNT_NOATIME;
+		break;
+	case MOUNT_ATTR_RELATIME:
+		mnt_flags |= MNT_RELATIME;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	f = fdget(fs_fd);
+	if (!f.file)
+		return -EBADF;
+
+	ret = -EINVAL;
+	if (f.file->f_op != &fscontext_fops)
+		goto err_fsfd;
+
+	fc = f.file->private_data;
+
+	ret = mutex_lock_interruptible(&fc->uapi_mutex);
+	if (ret < 0)
+		goto err_fsfd;
+
+	/* There must be a valid superblock or we can't mount it */
+	ret = -EINVAL;
+	if (!fc->root)
+		goto err_unlock;
+
+	ret = -EPERM;
+	if (mount_too_revealing(fc->root->d_sb, &mnt_flags)) {
+		pr_warn("VFS: Mount too revealing\n");
+		goto err_unlock;
+	}
+
+	ret = -EBUSY;
+	if (fc->phase != FS_CONTEXT_AWAITING_MOUNT)
+		goto err_unlock;
+
+	ret = -EPERM;
+	if ((fc->sb_flags & SB_MANDLOCK) && !may_mandlock())
+		goto err_unlock;
+
+	newmount.mnt = vfs_create_mount(fc);
+	if (IS_ERR(newmount.mnt)) {
+		ret = PTR_ERR(newmount.mnt);
+		goto err_unlock;
+	}
+	newmount.dentry = dget(fc->root);
+	newmount.mnt->mnt_flags = mnt_flags;
+
+	/* We've done the mount bit - now move the file context into more or
+	 * less the same state as if we'd done an fspick().  We don't want to
+	 * do any memory allocation or anything like that at this point as we
+	 * don't want to have to handle any errors incurred.
+	 */
+	vfs_clean_context(fc);
+
+	ns = alloc_mnt_ns(current->nsproxy->mnt_ns->user_ns, true);
+	if (IS_ERR(ns)) {
+		ret = PTR_ERR(ns);
+		goto err_path;
+	}
+	mnt = real_mount(newmount.mnt);
+	mnt->mnt_ns = ns;
+	ns->root = mnt;
+	ns->mounts = 1;
+	list_add(&mnt->mnt_list, &ns->list);
+	mntget(newmount.mnt);
+
+	/* Attach to an apparent O_PATH fd with a note that we need to unmount
+	 * it, not just simply put it.
+	 */
+	file = dentry_open(&newmount, O_PATH, fc->cred);
+	if (IS_ERR(file)) {
+		dissolve_on_fput(newmount.mnt);
+		ret = PTR_ERR(file);
+		goto err_path;
+	}
+	file->f_mode |= FMODE_NEED_UNMOUNT;
+
+	ret = get_unused_fd_flags((flags & FSMOUNT_CLOEXEC) ? O_CLOEXEC : 0);
+	if (ret >= 0)
+		fd_install(ret, file);
+	else
+		fput(file);
+
+err_path:
+	path_put(&newmount);
+err_unlock:
+	mutex_unlock(&fc->uapi_mutex);
+err_fsfd:
+	fdput(f);
+	return ret;
+}
+
+/*
+ * Move a mount from one place to another.  In combination with
+ * fsopen()/fsmount() this is used to install a new mount and in combination
+ * with open_tree(OPEN_TREE_CLONE [| AT_RECURSIVE]) it can be used to copy
+ * a mount subtree.
+ *
+ * Note the flags value is a combination of MOVE_MOUNT_* flags.
+ */
+SYSCALL_DEFINE5(move_mount,
+		int, from_dfd, const char *, from_pathname,
+		int, to_dfd, const char *, to_pathname,
+		unsigned int, flags)
+{
+	struct path from_path, to_path;
+	unsigned int lflags;
+	int ret = 0;
+
+	if (!may_mount())
+		return -EPERM;
+
+	if (flags & ~MOVE_MOUNT__MASK)
+		return -EINVAL;
+
+	/* If someone gives a pathname, they aren't permitted to move
+	 * from an fd that requires unmount as we can't get at the flag
+	 * to clear it afterwards.
+	 */
+	lflags = 0;
+	if (flags & MOVE_MOUNT_F_SYMLINKS)	lflags |= LOOKUP_FOLLOW;
+	if (flags & MOVE_MOUNT_F_AUTOMOUNTS)	lflags |= LOOKUP_AUTOMOUNT;
+	if (flags & MOVE_MOUNT_F_EMPTY_PATH)	lflags |= LOOKUP_EMPTY;
+
+	ret = user_path_at(from_dfd, from_pathname, lflags, &from_path);
+	if (ret < 0)
+		return ret;
+
+	lflags = 0;
+	if (flags & MOVE_MOUNT_T_SYMLINKS)	lflags |= LOOKUP_FOLLOW;
+	if (flags & MOVE_MOUNT_T_AUTOMOUNTS)	lflags |= LOOKUP_AUTOMOUNT;
+	if (flags & MOVE_MOUNT_T_EMPTY_PATH)	lflags |= LOOKUP_EMPTY;
+
+	ret = user_path_at(to_dfd, to_pathname, lflags, &to_path);
+	if (ret < 0)
+		goto out_from;
+
+	ret = security_move_mount(&from_path, &to_path);
+	if (ret < 0)
+		goto out_to;
+
+	ret = do_move_mount(&from_path, &to_path);
+
+out_to:
+	path_put(&to_path);
+out_from:
+	path_put(&from_path);
+	return ret;
+}
+
+/*
  * Return true if path is reachable from root
  *
  * namespace_sem or mount_lock is held
@@ -3228,6 +3684,7 @@ out0:
 static void __init init_mount_tree(void)
 {
 	struct vfsmount *mnt;
+	struct mount *m;
 	struct mnt_namespace *ns;
 	struct path root;
 	struct file_system_type *type;
@@ -3240,10 +3697,14 @@ static void __init init_mount_tree(void)
 	if (IS_ERR(mnt))
 		panic("Can't create rootfs");
 
-	ns = create_mnt_ns(mnt);
+	ns = alloc_mnt_ns(&init_user_ns, false);
 	if (IS_ERR(ns))
 		panic("Can't allocate initial namespace");
-
+	m = real_mount(mnt);
+	m->mnt_ns = ns;
+	ns->root = m;
+	ns->mounts = 1;
+	list_add(&m->mnt_list, &ns->list);
 	init_task.nsproxy->mnt_ns = ns;
 	get_mnt_ns(ns);
 
@@ -3297,10 +3758,10 @@ void put_mnt_ns(struct mnt_namespace *ns)
 	free_mnt_ns(ns);
 }
 
-struct vfsmount *kern_mount_data(struct file_system_type *type, void *data)
+struct vfsmount *kern_mount(struct file_system_type *type)
 {
 	struct vfsmount *mnt;
-	mnt = vfs_kern_mount(type, SB_KERNMOUNT, type->name, data);
+	mnt = vfs_kern_mount(type, SB_KERNMOUNT, type->name, NULL);
 	if (!IS_ERR(mnt)) {
 		/*
 		 * it is a longterm mount, don't release mnt until
@@ -3310,7 +3771,7 @@ struct vfsmount *kern_mount_data(struct file_system_type *type, void *data)
 	}
 	return mnt;
 }
-EXPORT_SYMBOL_GPL(kern_mount_data);
+EXPORT_SYMBOL_GPL(kern_mount);
 
 void kern_unmount(struct vfsmount *mnt)
 {
@@ -3352,7 +3813,8 @@ bool current_chrooted(void)
 	return chrooted;
 }
 
-static bool mnt_already_visible(struct mnt_namespace *ns, struct vfsmount *new,
+static bool mnt_already_visible(struct mnt_namespace *ns,
+				const struct super_block *sb,
 				int *new_mnt_flags)
 {
 	int new_flags = *new_mnt_flags;
@@ -3364,7 +3826,7 @@ static bool mnt_already_visible(struct mnt_namespace *ns, struct vfsmount *new,
 		struct mount *child;
 		int mnt_flags;
 
-		if (mnt->mnt.mnt_sb->s_type != new->mnt_sb->s_type)
+		if (mnt->mnt.mnt_sb->s_type != sb->s_type)
 			continue;
 
 		/* This mount is not fully visible if it's root directory
@@ -3415,7 +3877,7 @@ found:
 	return visible;
 }
 
-static bool mount_too_revealing(struct vfsmount *mnt, int *new_mnt_flags)
+static bool mount_too_revealing(const struct super_block *sb, int *new_mnt_flags)
 {
 	const unsigned long required_iflags = SB_I_NOEXEC | SB_I_NODEV;
 	struct mnt_namespace *ns = current->nsproxy->mnt_ns;
@@ -3425,7 +3887,7 @@ static bool mount_too_revealing(struct vfsmount *mnt, int *new_mnt_flags)
 		return false;
 
 	/* Can this filesystem be too revealing? */
-	s_iflags = mnt->mnt_sb->s_iflags;
+	s_iflags = sb->s_iflags;
 	if (!(s_iflags & SB_I_USERNS_VISIBLE))
 		return false;
 
@@ -3435,7 +3897,7 @@ static bool mount_too_revealing(struct vfsmount *mnt, int *new_mnt_flags)
 		return true;
 	}
 
-	return !mnt_already_visible(ns, mnt, new_mnt_flags);
+	return !mnt_already_visible(ns, sb, new_mnt_flags);
 }
 
 bool mnt_may_suid(struct vfsmount *mnt)
@@ -3484,6 +3946,9 @@ static int mntns_install(struct nsproxy *nsproxy, struct ns_common *ns)
 	    !ns_capable(current_user_ns(), CAP_SYS_ADMIN))
 		return -EPERM;
 
+	if (is_anon_ns(mnt_ns))
+		return -EINVAL;
+
 	if (fs->users != 1)
 		return -EINVAL;
 
diff --git a/fs/nfs/Kconfig b/fs/nfs/Kconfig
index 5f93cfacb3d1..295a7a21b774 100644
--- a/fs/nfs/Kconfig
+++ b/fs/nfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config NFS_FS
 	tristate "NFS client support"
 	depends on INET && FILE_LOCKING && MULTIUSER
@@ -121,7 +122,6 @@ config PNFS_FILE_LAYOUT
 config PNFS_BLOCK
 	tristate
 	depends on NFS_V4_1 && BLK_DEV_DM
-	depends on 64BIT || LBDAF
 	default NFS_V4
 
 config PNFS_FLEXFILE_LAYOUT
diff --git a/fs/nfs/blocklayout/Makefile b/fs/nfs/blocklayout/Makefile
index 3ca14c36d08b..7668a1bfb5fa 100644
--- a/fs/nfs/blocklayout/Makefile
+++ b/fs/nfs/blocklayout/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the pNFS block layout driver kernel module
 #
diff --git a/fs/nfs/callback.c b/fs/nfs/callback.c
index 0b602a39dd71..7817ad94a6ba 100644
--- a/fs/nfs/callback.c
+++ b/fs/nfs/callback.c
@@ -41,11 +41,13 @@ static struct svc_program nfs4_callback_program;
 
 static int nfs4_callback_up_net(struct svc_serv *serv, struct net *net)
 {
+	const struct cred *cred = current_cred();
 	int ret;
 	struct nfs_net *nn = net_generic(net, nfs_net_id);
 
 	ret = svc_create_xprt(serv, "tcp", net, PF_INET,
-				nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS);
+				nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS,
+				cred);
 	if (ret <= 0)
 		goto out_err;
 	nn->nfs_callback_tcpport = ret;
@@ -53,7 +55,8 @@ static int nfs4_callback_up_net(struct svc_serv *serv, struct net *net)
 		nn->nfs_callback_tcpport, PF_INET, net->ns.inum);
 
 	ret = svc_create_xprt(serv, "tcp", net, PF_INET6,
-				nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS);
+				nfs_callback_set_tcpport, SVC_SOCK_ANONYMOUS,
+				cred);
 	if (ret > 0) {
 		nn->nfs_callback_tcpport6 = ret;
 		dprintk("NFS: Callback listener port = %u (af %u, net %x)\n",
@@ -457,4 +460,6 @@ static struct svc_program nfs4_callback_program = {
 	.pg_class = "nfs",				/* authentication class */
 	.pg_stats = &nfs4_callback_stats,
 	.pg_authenticate = nfs_callback_authenticate,
+	.pg_init_request = svc_generic_init_request,
+	.pg_rpcbind_set	= svc_generic_rpcbind_set,
 };
diff --git a/fs/nfs/callback_xdr.c b/fs/nfs/callback_xdr.c
index a87a56273407..73a5a5ea2976 100644
--- a/fs/nfs/callback_xdr.c
+++ b/fs/nfs/callback_xdr.c
@@ -72,16 +72,6 @@ static int nfs4_encode_void(struct svc_rqst *rqstp, __be32 *p)
 	return xdr_ressize_check(rqstp, p);
 }
 
-static __be32 *read_buf(struct xdr_stream *xdr, size_t nbytes)
-{
-	__be32 *p;
-
-	p = xdr_inline_decode(xdr, nbytes);
-	if (unlikely(p == NULL))
-		printk(KERN_WARNING "NFS: NFSv4 callback reply buffer overflowed!\n");
-	return p;
-}
-
 static __be32 decode_string(struct xdr_stream *xdr, unsigned int *len,
 		const char **str, size_t maxlen)
 {
@@ -98,13 +88,13 @@ static __be32 decode_fh(struct xdr_stream *xdr, struct nfs_fh *fh)
 {
 	__be32 *p;
 
-	p = read_buf(xdr, 4);
+	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 	fh->size = ntohl(*p);
 	if (fh->size > NFS4_FHSIZE)
 		return htonl(NFS4ERR_BADHANDLE);
-	p = read_buf(xdr, fh->size);
+	p = xdr_inline_decode(xdr, fh->size);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 	memcpy(&fh->data[0], p, fh->size);
@@ -117,11 +107,11 @@ static __be32 decode_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
 	__be32 *p;
 	unsigned int attrlen;
 
-	p = read_buf(xdr, 4);
+	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 	attrlen = ntohl(*p);
-	p = read_buf(xdr, attrlen << 2);
+	p = xdr_inline_decode(xdr, attrlen << 2);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 	if (likely(attrlen > 0))
@@ -135,7 +125,7 @@ static __be32 decode_stateid(struct xdr_stream *xdr, nfs4_stateid *stateid)
 {
 	__be32 *p;
 
-	p = read_buf(xdr, NFS4_STATEID_SIZE);
+	p = xdr_inline_decode(xdr, NFS4_STATEID_SIZE);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 	memcpy(stateid->data, p, NFS4_STATEID_SIZE);
@@ -156,7 +146,7 @@ static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound
 	status = decode_string(xdr, &hdr->taglen, &hdr->tag, CB_OP_TAGLEN_MAXSZ);
 	if (unlikely(status != 0))
 		return status;
-	p = read_buf(xdr, 12);
+	p = xdr_inline_decode(xdr, 12);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 	hdr->minorversion = ntohl(*p++);
@@ -176,7 +166,7 @@ static __be32 decode_compound_hdr_arg(struct xdr_stream *xdr, struct cb_compound
 static __be32 decode_op_hdr(struct xdr_stream *xdr, unsigned int *op)
 {
 	__be32 *p;
-	p = read_buf(xdr, 4);
+	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE_HDR);
 	*op = ntohl(*p);
@@ -205,7 +195,7 @@ static __be32 decode_recall_args(struct svc_rqst *rqstp,
 	status = decode_delegation_stateid(xdr, &args->stateid);
 	if (unlikely(status != 0))
 		return status;
-	p = read_buf(xdr, 4);
+	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 	args->truncate = ntohl(*p);
@@ -227,7 +217,7 @@ static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp,
 	__be32 status = 0;
 	uint32_t iomode;
 
-	p = read_buf(xdr, 4 * sizeof(uint32_t));
+	p = xdr_inline_decode(xdr, 4 * sizeof(uint32_t));
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_BADXDR);
 
@@ -245,14 +235,14 @@ static __be32 decode_layoutrecall_args(struct svc_rqst *rqstp,
 		if (unlikely(status != 0))
 			return status;
 
-		p = read_buf(xdr, 2 * sizeof(uint64_t));
+		p = xdr_inline_decode(xdr, 2 * sizeof(uint64_t));
 		if (unlikely(p == NULL))
 			return htonl(NFS4ERR_BADXDR);
 		p = xdr_decode_hyper(p, &args->cbl_range.offset);
 		p = xdr_decode_hyper(p, &args->cbl_range.length);
 		return decode_layout_stateid(xdr, &args->cbl_stateid);
 	} else if (args->cbl_recall_type == RETURN_FSID) {
-		p = read_buf(xdr, 2 * sizeof(uint64_t));
+		p = xdr_inline_decode(xdr, 2 * sizeof(uint64_t));
 		if (unlikely(p == NULL))
 			return htonl(NFS4ERR_BADXDR);
 		p = xdr_decode_hyper(p, &args->cbl_fsid.major);
@@ -275,7 +265,7 @@ __be32 decode_devicenotify_args(struct svc_rqst *rqstp,
 	args->ndevs = 0;
 
 	/* Num of device notifications */
-	p = read_buf(xdr, sizeof(uint32_t));
+	p = xdr_inline_decode(xdr, sizeof(uint32_t));
 	if (unlikely(p == NULL)) {
 		status = htonl(NFS4ERR_BADXDR);
 		goto out;
@@ -298,7 +288,8 @@ __be32 decode_devicenotify_args(struct svc_rqst *rqstp,
 	for (i = 0; i < n; i++) {
 		struct cb_devicenotifyitem *dev = &args->devs[i];
 
-		p = read_buf(xdr, (4 * sizeof(uint32_t)) + NFS4_DEVICEID4_SIZE);
+		p = xdr_inline_decode(xdr, (4 * sizeof(uint32_t)) +
+				      NFS4_DEVICEID4_SIZE);
 		if (unlikely(p == NULL)) {
 			status = htonl(NFS4ERR_BADXDR);
 			goto err;
@@ -329,7 +320,7 @@ __be32 decode_devicenotify_args(struct svc_rqst *rqstp,
 		p += XDR_QUADLEN(NFS4_DEVICEID4_SIZE);
 
 		if (dev->cbd_layout_type == NOTIFY_DEVICEID4_CHANGE) {
-			p = read_buf(xdr, sizeof(uint32_t));
+			p = xdr_inline_decode(xdr, sizeof(uint32_t));
 			if (unlikely(p == NULL)) {
 				status = htonl(NFS4ERR_BADXDR);
 				goto err;
@@ -359,7 +350,7 @@ static __be32 decode_sessionid(struct xdr_stream *xdr,
 {
 	__be32 *p;
 
-	p = read_buf(xdr, NFS4_MAX_SESSIONID_LEN);
+	p = xdr_inline_decode(xdr, NFS4_MAX_SESSIONID_LEN);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 
@@ -379,13 +370,13 @@ static __be32 decode_rc_list(struct xdr_stream *xdr,
 		goto out;
 
 	status = htonl(NFS4ERR_RESOURCE);
-	p = read_buf(xdr, sizeof(uint32_t));
+	p = xdr_inline_decode(xdr, sizeof(uint32_t));
 	if (unlikely(p == NULL))
 		goto out;
 
 	rc_list->rcl_nrefcalls = ntohl(*p++);
 	if (rc_list->rcl_nrefcalls) {
-		p = read_buf(xdr,
+		p = xdr_inline_decode(xdr,
 			     rc_list->rcl_nrefcalls * 2 * sizeof(uint32_t));
 		if (unlikely(p == NULL))
 			goto out;
@@ -418,7 +409,7 @@ static __be32 decode_cb_sequence_args(struct svc_rqst *rqstp,
 	if (status)
 		return status;
 
-	p = read_buf(xdr, 5 * sizeof(uint32_t));
+	p = xdr_inline_decode(xdr, 5 * sizeof(uint32_t));
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_RESOURCE);
 
@@ -461,7 +452,7 @@ static __be32 decode_recallany_args(struct svc_rqst *rqstp,
 	uint32_t bitmap[2];
 	__be32 *p, status;
 
-	p = read_buf(xdr, 4);
+	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_BADXDR);
 	args->craa_objs_to_keep = ntohl(*p++);
@@ -480,7 +471,7 @@ static __be32 decode_recallslot_args(struct svc_rqst *rqstp,
 	struct cb_recallslotargs *args = argp;
 	__be32 *p;
 
-	p = read_buf(xdr, 4);
+	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_BADXDR);
 	args->crsa_target_highest_slotid = ntohl(*p++);
@@ -492,14 +483,14 @@ static __be32 decode_lockowner(struct xdr_stream *xdr, struct cb_notify_lock_arg
 	__be32		*p;
 	unsigned int	len;
 
-	p = read_buf(xdr, 12);
+	p = xdr_inline_decode(xdr, 12);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_BADXDR);
 
 	p = xdr_decode_hyper(p, &args->cbnl_owner.clientid);
 	len = be32_to_cpu(*p);
 
-	p = read_buf(xdr, len);
+	p = xdr_inline_decode(xdr, len);
 	if (unlikely(p == NULL))
 		return htonl(NFS4ERR_BADXDR);
 
@@ -537,7 +528,7 @@ static __be32 decode_write_response(struct xdr_stream *xdr,
 	__be32 *p;
 
 	/* skip the always zero field */
-	p = read_buf(xdr, 4);
+	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
 		goto out;
 	p++;
@@ -577,7 +568,7 @@ static __be32 decode_offload_args(struct svc_rqst *rqstp,
 		return status;
 
 	/* decode status */
-	p = read_buf(xdr, 4);
+	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
 		goto out;
 	args->error = ntohl(*p++);
@@ -943,10 +934,11 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp)
 	};
 	unsigned int nops = 0;
 
-	xdr_init_decode(&xdr_in, &rqstp->rq_arg, rqstp->rq_arg.head[0].iov_base);
+	xdr_init_decode(&xdr_in, &rqstp->rq_arg,
+			rqstp->rq_arg.head[0].iov_base, NULL);
 
 	p = (__be32*)((char *)rqstp->rq_res.head[0].iov_base + rqstp->rq_res.head[0].iov_len);
-	xdr_init_encode(&xdr_out, &rqstp->rq_res, p);
+	xdr_init_encode(&xdr_out, &rqstp->rq_res, p, NULL);
 
 	status = decode_compound_hdr_arg(&xdr_in, &hdr_arg);
 	if (status == htonl(NFS4ERR_RESOURCE))
@@ -991,7 +983,7 @@ static __be32 nfs4_callback_compound(struct svc_rqst *rqstp)
 
 out_invalidcred:
 	pr_warn_ratelimited("NFS: NFSv4 callback contains invalid cred\n");
-	return rpc_autherr_badcred;
+	return svc_return_autherr(rqstp, rpc_autherr_badcred);
 }
 
 /*
diff --git a/fs/nfs/client.c b/fs/nfs/client.c
index fb1cf1a4bda2..d7e4f0848e28 100644
--- a/fs/nfs/client.c
+++ b/fs/nfs/client.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* client.c: NFS client sharing and management code
  *
  * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 
@@ -284,6 +280,7 @@ static struct nfs_client *nfs_match_client(const struct nfs_client_initdata *dat
 	struct nfs_client *clp;
 	const struct sockaddr *sap = data->addr;
 	struct nfs_net *nn = net_generic(data->net, nfs_net_id);
+	int error;
 
 again:
 	list_for_each_entry(clp, &nn->nfs_client_list, cl_share_link) {
@@ -296,9 +293,11 @@ again:
 		if (clp->cl_cons_state > NFS_CS_READY) {
 			refcount_inc(&clp->cl_count);
 			spin_unlock(&nn->nfs_client_lock);
-			nfs_wait_client_init_complete(clp);
+			error = nfs_wait_client_init_complete(clp);
 			nfs_put_client(clp);
 			spin_lock(&nn->nfs_client_lock);
+			if (error < 0)
+				return ERR_PTR(error);
 			goto again;
 		}
 
@@ -407,6 +406,8 @@ struct nfs_client *nfs_get_client(const struct nfs_client_initdata *cl_init)
 		clp = nfs_match_client(cl_init);
 		if (clp) {
 			spin_unlock(&nn->nfs_client_lock);
+			if (IS_ERR(clp))
+				return clp;
 			if (new)
 				new->rpc_ops->free_client(new);
 			return nfs_found_client(cl_init, clp);
@@ -453,7 +454,7 @@ void nfs_init_timeout_values(struct rpc_timeout *to, int proto,
 	case XPRT_TRANSPORT_RDMA:
 		if (retrans == NFS_UNSPEC_RETRANS)
 			to->to_retries = NFS_DEF_TCP_RETRANS;
-		if (timeo == NFS_UNSPEC_TIMEO || to->to_retries == 0)
+		if (timeo == NFS_UNSPEC_TIMEO || to->to_initval == 0)
 			to->to_initval = NFS_DEF_TCP_TIMEO * HZ / 10;
 		if (to->to_initval > NFS_MAX_TCP_TIMEOUT)
 			to->to_initval = NFS_MAX_TCP_TIMEOUT;
@@ -500,6 +501,7 @@ int nfs_create_rpc_client(struct nfs_client *clp,
 		.program	= &nfs_program,
 		.version	= clp->rpc_ops->version,
 		.authflavor	= flavor,
+		.cred		= cl_init->cred,
 	};
 
 	if (test_bit(NFS_CS_DISCRTRY, &clp->cl_flags))
@@ -552,6 +554,7 @@ static int nfs_start_lockd(struct nfs_server *server)
 					1 : 0,
 		.net		= clp->cl_net,
 		.nlmclnt_ops 	= clp->cl_nfs_mod->rpc_ops->nlmclnt_ops,
+		.cred		= current_cred(),
 	};
 
 	if (nlm_init.nfs_version > 3)
@@ -598,6 +601,8 @@ int nfs_init_server_rpcclient(struct nfs_server *server,
 			sizeof(server->client->cl_timeout_default));
 	server->client->cl_timeout = &server->client->cl_timeout_default;
 	server->client->cl_softrtry = 0;
+	if (server->flags & NFS_MOUNT_SOFTERR)
+		server->client->cl_softerr = 1;
 	if (server->flags & NFS_MOUNT_SOFT)
 		server->client->cl_softrtry = 1;
 
@@ -652,6 +657,7 @@ static int nfs_init_server(struct nfs_server *server,
 		.proto = data->nfs_server.protocol,
 		.net = data->net,
 		.timeparms = &timeparms,
+		.cred = server->cred,
 	};
 	struct nfs_client *clp;
 	int error;
@@ -920,6 +926,7 @@ void nfs_free_server(struct nfs_server *server)
 	ida_destroy(&server->lockowner_id);
 	ida_destroy(&server->openowner_id);
 	nfs_free_iostats(server->io_stats);
+	put_cred(server->cred);
 	kfree(server);
 	nfs_release_automount_timer();
 }
@@ -940,6 +947,8 @@ struct nfs_server *nfs_create_server(struct nfs_mount_info *mount_info,
 	if (!server)
 		return ERR_PTR(-ENOMEM);
 
+	server->cred = get_cred(current_cred());
+
 	error = -ENOMEM;
 	fattr = nfs_alloc_fattr();
 	if (fattr == NULL)
@@ -1006,6 +1015,8 @@ struct nfs_server *nfs_clone_server(struct nfs_server *source,
 	if (!server)
 		return ERR_PTR(-ENOMEM);
 
+	server->cred = get_cred(source->cred);
+
 	error = -ENOMEM;
 	fattr_fsinfo = nfs_alloc_fattr();
 	if (fattr_fsinfo == NULL)
diff --git a/fs/nfs/delegation.c b/fs/nfs/delegation.c
index 885363ca8569..0ff3facf81da 100644
--- a/fs/nfs/delegation.c
+++ b/fs/nfs/delegation.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/nfs/delegation.c
  *
@@ -229,6 +230,8 @@ static struct inode *nfs_delegation_grab_inode(struct nfs_delegation *delegation
 	spin_lock(&delegation->lock);
 	if (delegation->inode != NULL)
 		inode = igrab(delegation->inode);
+	if (!inode)
+		set_bit(NFS_DELEGATION_INODE_FREEING, &delegation->flags);
 	spin_unlock(&delegation->lock);
 	return inode;
 }
@@ -681,7 +684,7 @@ void nfs_expire_all_delegations(struct nfs_client *clp)
 
 /**
  * nfs_super_return_all_delegations - return delegations for one superblock
- * @sb: sb to process
+ * @server: pointer to nfs_server to process
  *
  */
 void nfs_server_return_all_delegations(struct nfs_server *server)
@@ -944,10 +947,11 @@ restart:
 	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
 		list_for_each_entry_rcu(delegation, &server->delegations,
 								super_list) {
-			if (test_bit(NFS_DELEGATION_RETURNING,
-						&delegation->flags))
-				continue;
-			if (test_bit(NFS_DELEGATION_NEED_RECLAIM,
+			if (test_bit(NFS_DELEGATION_INODE_FREEING,
+						&delegation->flags) ||
+			    test_bit(NFS_DELEGATION_RETURNING,
+						&delegation->flags) ||
+			    test_bit(NFS_DELEGATION_NEED_RECLAIM,
 						&delegation->flags) == 0)
 				continue;
 			if (!nfs_sb_active(server->super))
@@ -1031,6 +1035,18 @@ void nfs_mark_test_expired_all_delegations(struct nfs_client *clp)
 }
 
 /**
+ * nfs_test_expired_all_delegations - test all delegations for a client
+ * @clp: nfs_client to process
+ *
+ * Helper for handling "recallable state revoked" status from server.
+ */
+void nfs_test_expired_all_delegations(struct nfs_client *clp)
+{
+	nfs_mark_test_expired_all_delegations(clp);
+	nfs4_schedule_state_manager(clp);
+}
+
+/**
  * nfs_reap_expired_delegations - reap expired delegations
  * @clp: nfs_client to process
  *
@@ -1053,10 +1069,11 @@ restart:
 	list_for_each_entry_rcu(server, &clp->cl_superblocks, client_link) {
 		list_for_each_entry_rcu(delegation, &server->delegations,
 								super_list) {
-			if (test_bit(NFS_DELEGATION_RETURNING,
-						&delegation->flags))
-				continue;
-			if (test_bit(NFS_DELEGATION_TEST_EXPIRED,
+			if (test_bit(NFS_DELEGATION_INODE_FREEING,
+						&delegation->flags) ||
+			    test_bit(NFS_DELEGATION_RETURNING,
+						&delegation->flags) ||
+			    test_bit(NFS_DELEGATION_TEST_EXPIRED,
 						&delegation->flags) == 0)
 				continue;
 			if (!nfs_sb_active(server->super))
diff --git a/fs/nfs/delegation.h b/fs/nfs/delegation.h
index dcbf3394ba0e..5799777df5ec 100644
--- a/fs/nfs/delegation.h
+++ b/fs/nfs/delegation.h
@@ -34,6 +34,7 @@ enum {
 	NFS_DELEGATION_RETURNING,
 	NFS_DELEGATION_REVOKED,
 	NFS_DELEGATION_TEST_EXPIRED,
+	NFS_DELEGATION_INODE_FREEING,
 };
 
 int nfs_inode_set_delegation(struct inode *inode, const struct cred *cred,
@@ -57,6 +58,7 @@ void nfs_delegation_mark_reclaim(struct nfs_client *clp);
 void nfs_delegation_reap_unclaimed(struct nfs_client *clp);
 
 void nfs_mark_test_expired_all_delegations(struct nfs_client *clp);
+void nfs_test_expired_all_delegations(struct nfs_client *clp);
 void nfs_reap_expired_delegations(struct nfs_client *clp);
 
 /* NFSv4 delegation-related procedures */
diff --git a/fs/nfs/dir.c b/fs/nfs/dir.c
index 6bf4471850c8..57b6a45576ad 100644
--- a/fs/nfs/dir.c
+++ b/fs/nfs/dir.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/nfs/dir.c
  *
@@ -139,12 +140,19 @@ struct nfs_cache_array {
 	struct nfs_cache_array_entry array[0];
 };
 
+struct readdirvec {
+	unsigned long nr;
+	unsigned long index;
+	struct page *pages[NFS_MAX_READDIR_RAPAGES];
+};
+
 typedef int (*decode_dirent_t)(struct xdr_stream *, struct nfs_entry *, bool);
 typedef struct {
 	struct file	*file;
 	struct page	*page;
 	struct dir_context *ctx;
 	unsigned long	page_index;
+	struct readdirvec pvec;
 	u64		*dir_cookie;
 	u64		last_cookie;
 	loff_t		current_index;
@@ -524,6 +532,10 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en
 	struct nfs_cache_array *array;
 	unsigned int count = 0;
 	int status;
+	int max_rapages = NFS_MAX_READDIR_RAPAGES;
+
+	desc->pvec.index = desc->page_index;
+	desc->pvec.nr = 0;
 
 	scratch = alloc_page(GFP_KERNEL);
 	if (scratch == NULL)
@@ -548,20 +560,40 @@ int nfs_readdir_page_filler(nfs_readdir_descriptor_t *desc, struct nfs_entry *en
 		if (desc->plus)
 			nfs_prime_dcache(file_dentry(desc->file), entry);
 
-		status = nfs_readdir_add_to_array(entry, page);
+		status = nfs_readdir_add_to_array(entry, desc->pvec.pages[desc->pvec.nr]);
+		if (status == -ENOSPC) {
+			desc->pvec.nr++;
+			if (desc->pvec.nr == max_rapages)
+				break;
+			status = nfs_readdir_add_to_array(entry, desc->pvec.pages[desc->pvec.nr]);
+		}
 		if (status != 0)
 			break;
 	} while (!entry->eof);
 
+	/*
+	 * page and desc->pvec.pages[0] are valid, don't need to check
+	 * whether or not to be NULL.
+	 */
+	copy_highpage(page, desc->pvec.pages[0]);
+
 out_nopages:
 	if (count == 0 || (status == -EBADCOOKIE && entry->eof != 0)) {
-		array = kmap(page);
+		array = kmap_atomic(desc->pvec.pages[desc->pvec.nr]);
 		array->eof_index = array->size;
 		status = 0;
-		kunmap(page);
+		kunmap_atomic(array);
 	}
 
 	put_page(scratch);
+
+	/*
+	 * desc->pvec.nr > 0 means at least one page was completely filled,
+	 * we should return -ENOSPC. Otherwise function
+	 * nfs_readdir_xdr_to_array will enter infinite loop.
+	 */
+	if (desc->pvec.nr > 0)
+		return -ENOSPC;
 	return status;
 }
 
@@ -574,8 +606,8 @@ void nfs_readdir_free_pages(struct page **pages, unsigned int npages)
 }
 
 /*
- * nfs_readdir_large_page will allocate pages that must be freed with a call
- * to nfs_readdir_free_pagearray
+ * nfs_readdir_alloc_pages() will allocate pages that must be freed with a call
+ * to nfs_readdir_free_pages()
  */
 static
 int nfs_readdir_alloc_pages(struct page **pages, unsigned int npages)
@@ -595,6 +627,24 @@ out_freepages:
 	return -ENOMEM;
 }
 
+/*
+ * nfs_readdir_rapages_init initialize rapages by nfs_cache_array structure.
+ */
+static
+void nfs_readdir_rapages_init(nfs_readdir_descriptor_t *desc)
+{
+	struct nfs_cache_array *array;
+	int max_rapages = NFS_MAX_READDIR_RAPAGES;
+	int index;
+
+	for (index = 0; index < max_rapages; index++) {
+		array = kmap_atomic(desc->pvec.pages[index]);
+		memset(array, 0, sizeof(struct nfs_cache_array));
+		array->eof_index = -1;
+		kunmap_atomic(array);
+	}
+}
+
 static
 int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page, struct inode *inode)
 {
@@ -605,6 +655,12 @@ int nfs_readdir_xdr_to_array(nfs_readdir_descriptor_t *desc, struct page *page,
 	int status = -ENOMEM;
 	unsigned int array_size = ARRAY_SIZE(pages);
 
+	/*
+	 * This means we hit readdir rdpages miss, the preallocated rdpages
+	 * are useless, the preallocate rdpages should be reinitialized.
+	 */
+	nfs_readdir_rapages_init(desc);
+
 	entry.prev_cookie = 0;
 	entry.cookie = desc->last_cookie;
 	entry.eof = 0;
@@ -659,14 +715,30 @@ out:
  * We only need to convert from xdr once so future lookups are much simpler
  */
 static
-int nfs_readdir_filler(nfs_readdir_descriptor_t *desc, struct page* page)
+int nfs_readdir_filler(void *data, struct page* page)
 {
+	nfs_readdir_descriptor_t *desc = data;
 	struct inode	*inode = file_inode(desc->file);
 	int ret;
 
-	ret = nfs_readdir_xdr_to_array(desc, page, inode);
-	if (ret < 0)
-		goto error;
+	/*
+	 * If desc->page_index in range desc->pvec.index and
+	 * desc->pvec.index + desc->pvec.nr, we get readdir cache hit.
+	 */
+	if (desc->page_index >= desc->pvec.index &&
+		desc->page_index < (desc->pvec.index + desc->pvec.nr)) {
+		/*
+		 * page and desc->pvec.pages[x] are valid, don't need to check
+		 * whether or not to be NULL.
+		 */
+		copy_highpage(page, desc->pvec.pages[desc->page_index - desc->pvec.index]);
+		ret = 0;
+	} else {
+		ret = nfs_readdir_xdr_to_array(desc, page, inode);
+		if (ret < 0)
+			goto error;
+	}
+
 	SetPageUptodate(page);
 
 	if (invalidate_inode_pages2_range(inode->i_mapping, page->index + 1, -1) < 0) {
@@ -692,8 +764,8 @@ void cache_page_release(nfs_readdir_descriptor_t *desc)
 static
 struct page *get_cache_page(nfs_readdir_descriptor_t *desc)
 {
-	return read_cache_page(desc->file->f_mapping,
-			desc->page_index, (filler_t *)nfs_readdir_filler, desc);
+	return read_cache_page(desc->file->f_mapping, desc->page_index,
+			nfs_readdir_filler, desc);
 }
 
 /*
@@ -831,6 +903,7 @@ static int nfs_readdir(struct file *file, struct dir_context *ctx)
 			*desc = &my_desc;
 	struct nfs_open_dir_context *dir_ctx = file->private_data;
 	int res = 0;
+	int max_rapages = NFS_MAX_READDIR_RAPAGES;
 
 	dfprintk(FILE, "NFS: readdir(%pD2) starting at cookie %llu\n",
 			file, (long long)ctx->pos);
@@ -850,6 +923,12 @@ static int nfs_readdir(struct file *file, struct dir_context *ctx)
 	desc->decode = NFS_PROTO(inode)->decode_dirent;
 	desc->plus = nfs_use_readdirplus(inode, ctx);
 
+	res = nfs_readdir_alloc_pages(desc->pvec.pages, max_rapages);
+	if (res < 0)
+		return -ENOMEM;
+
+	nfs_readdir_rapages_init(desc);
+
 	if (ctx->pos == 0 || nfs_attribute_cache_expired(inode))
 		res = nfs_revalidate_mapping(inode, file->f_mapping);
 	if (res < 0)
@@ -885,6 +964,7 @@ static int nfs_readdir(struct file *file, struct dir_context *ctx)
 			break;
 	} while (!desc->eof);
 out:
+	nfs_readdir_free_pages(desc->pvec.pages, max_rapages);
 	if (res > 0)
 		res = 0;
 	dfprintk(FILE, "NFS: readdir(%pD2) returns %d\n", file, res);
@@ -945,7 +1025,7 @@ static int nfs_fsync_dir(struct file *filp, loff_t start, loff_t end,
 
 /**
  * nfs_force_lookup_revalidate - Mark the directory as having changed
- * @dir - pointer to directory inode
+ * @dir: pointer to directory inode
  *
  * This forces the revalidation code in nfs_lookup_revalidate() to do a
  * full lookup on all child dentries of 'dir' whenever a change occurs
@@ -1649,7 +1729,7 @@ nfs4_do_lookup_revalidate(struct inode *dir, struct dentry *dentry,
 reval_dentry:
 	if (flags & LOOKUP_RCU)
 		return -ECHILD;
-	return nfs_lookup_revalidate_dentry(dir, dentry, inode);;
+	return nfs_lookup_revalidate_dentry(dir, dentry, inode);
 
 full_reval:
 	return nfs_do_lookup_revalidate(dir, dentry, flags);
diff --git a/fs/nfs/direct.c b/fs/nfs/direct.c
index 33824a0a57bf..0cb442406168 100644
--- a/fs/nfs/direct.c
+++ b/fs/nfs/direct.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/nfs/direct.c
  *
@@ -428,7 +429,7 @@ out_put:
 	hdr->release(hdr);
 }
 
-static void nfs_read_sync_pgio_error(struct list_head *head)
+static void nfs_read_sync_pgio_error(struct list_head *head, int error)
 {
 	struct nfs_page *req;
 
@@ -492,7 +493,7 @@ static ssize_t nfs_direct_read_schedule_iovec(struct nfs_direct_req *dreq,
 			struct nfs_page *req;
 			unsigned int req_len = min_t(size_t, bytes, PAGE_SIZE - pgbase);
 			/* XXX do we need to do the eof zeroing found in async_filler? */
-			req = nfs_create_request(dreq->ctx, pagevec[i], NULL,
+			req = nfs_create_request(dreq->ctx, pagevec[i],
 						 pgbase, req_len);
 			if (IS_ERR(req)) {
 				result = PTR_ERR(req);
@@ -663,9 +664,10 @@ static void nfs_direct_write_reschedule(struct nfs_direct_req *dreq)
 	}
 
 	list_for_each_entry_safe(req, tmp, &reqs, wb_list) {
+		/* Bump the transmission count */
+		req->wb_nio++;
 		if (!nfs_pageio_add_request(&desc, req)) {
-			nfs_list_remove_request(req);
-			nfs_list_add_request(req, &failed);
+			nfs_list_move_request(req, &failed);
 			spin_lock(&cinfo.inode->i_lock);
 			dreq->flags = 0;
 			if (desc.pg_error < 0)
@@ -704,6 +706,11 @@ static void nfs_direct_commit_complete(struct nfs_commit_data *data)
 		req = nfs_list_entry(data->pages.next);
 		nfs_list_remove_request(req);
 		if (dreq->flags == NFS_ODIRECT_RESCHED_WRITES) {
+			/*
+			 * Despite the reboot, the write was successful,
+			 * so reset wb_nio.
+			 */
+			req->wb_nio = 0;
 			/* Note the rewrite will go through mds */
 			nfs_mark_request_commit(req, NULL, &cinfo, 0);
 		} else
@@ -821,7 +828,7 @@ out_put:
 	hdr->release(hdr);
 }
 
-static void nfs_write_sync_pgio_error(struct list_head *head)
+static void nfs_write_sync_pgio_error(struct list_head *head, int error)
 {
 	struct nfs_page *req;
 
@@ -900,7 +907,7 @@ static ssize_t nfs_direct_write_schedule_iovec(struct nfs_direct_req *dreq,
 			struct nfs_page *req;
 			unsigned int req_len = min_t(size_t, bytes, PAGE_SIZE - pgbase);
 
-			req = nfs_create_request(dreq->ctx, pagevec[i], NULL,
+			req = nfs_create_request(dreq->ctx, pagevec[i],
 						 pgbase, req_len);
 			if (IS_ERR(req)) {
 				result = PTR_ERR(req);
diff --git a/fs/nfs/dns_resolve.c b/fs/nfs/dns_resolve.c
index a7d3df85736d..aec769a500a1 100644
--- a/fs/nfs/dns_resolve.c
+++ b/fs/nfs/dns_resolve.c
@@ -22,7 +22,8 @@ ssize_t nfs_dns_resolve_name(struct net *net, char *name, size_t namelen,
 	char *ip_addr = NULL;
 	int ip_len;
 
-	ip_len = dns_query(NULL, name, namelen, NULL, &ip_addr, NULL);
+	ip_len = dns_query(net, NULL, name, namelen, NULL, &ip_addr, NULL,
+			   false);
 	if (ip_len > 0)
 		ret = rpc_pton(net, ip_addr, ip_len, sa, salen);
 	else
diff --git a/fs/nfs/file.c b/fs/nfs/file.c
index 29553fdba8af..95dc90570786 100644
--- a/fs/nfs/file.c
+++ b/fs/nfs/file.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/nfs/file.c
  *
@@ -89,8 +90,8 @@ EXPORT_SYMBOL_GPL(nfs_file_release);
 
 /**
  * nfs_revalidate_size - Revalidate the file size
- * @inode - pointer to inode struct
- * @file - pointer to struct file
+ * @inode: pointer to inode struct
+ * @filp: pointer to struct file
  *
  * Revalidates the file length. This is basically a wrapper around
  * nfs_revalidate_inode() that takes into account the fact that we may
@@ -147,7 +148,7 @@ nfs_file_flush(struct file *file, fl_owner_t id)
 		return 0;
 
 	/* Flush writes to the server and return any errors */
-	return vfs_fsync(file, 0);
+	return nfs_wb_all(inode);
 }
 
 ssize_t
@@ -199,13 +200,6 @@ EXPORT_SYMBOL_GPL(nfs_file_mmap);
  * Flush any dirty pages for this process, and check for write errors.
  * The return status from this call provides a reliable indication of
  * whether any write errors occurred for this process.
- *
- * Notice that it clears the NFS_CONTEXT_ERROR_WRITE before synching to
- * disk, but it retrieves and clears ctx->error after synching, despite
- * the two being set at the same time in nfs_context_set_write_error().
- * This is because the former is used to notify the _next_ call to
- * nfs_file_write() that a write error occurred, and hence cause it to
- * fall back to doing a synchronous write.
  */
 static int
 nfs_file_fsync_commit(struct file *file, int datasync)
@@ -220,11 +214,8 @@ nfs_file_fsync_commit(struct file *file, int datasync)
 	nfs_inc_stats(inode, NFSIOS_VFSFSYNC);
 	do_resend = test_and_clear_bit(NFS_CONTEXT_RESEND_WRITES, &ctx->flags);
 	status = nfs_commit_inode(inode, FLUSH_SYNC);
-	if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags)) {
-		ret = xchg(&ctx->error, 0);
-		if (ret)
-			goto out;
-	}
+	if (status == 0)
+		status = file_check_and_advance_wb_err(file);
 	if (status < 0) {
 		ret = status;
 		goto out;
@@ -245,13 +236,7 @@ nfs_file_fsync(struct file *file, loff_t start, loff_t end, int datasync)
 	trace_nfs_fsync_enter(inode);
 
 	do {
-		struct nfs_open_context *ctx = nfs_file_open_context(file);
-		ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
-		if (test_and_clear_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags)) {
-			int ret2 = xchg(&ctx->error, 0);
-			if (ret2)
-				ret = ret2;
-		}
+		ret = file_write_and_wait_range(file, start, end);
 		if (ret != 0)
 			break;
 		ret = nfs_file_fsync_commit(file, datasync);
@@ -276,6 +261,12 @@ EXPORT_SYMBOL_GPL(nfs_file_fsync);
  * then a modify/write/read cycle when writing to a page in the
  * page cache.
  *
+ * Some pNFS layout drivers can only read/write at a certain block
+ * granularity like all block devices and therefore we must perform
+ * read/modify/write whenever a page hasn't read yet and the data
+ * to be written there is not aligned to a block boundary and/or
+ * smaller than the block size.
+ *
  * The modify/write/read cycle may occur if a page is read before
  * being completely filled by the writer.  In this situation, the
  * page must be completely written to stable storage on the server
@@ -291,26 +282,32 @@ EXPORT_SYMBOL_GPL(nfs_file_fsync);
  * and that the new data won't completely replace the old data in
  * that range of the file.
  */
-static int nfs_want_read_modify_write(struct file *file, struct page *page,
-			loff_t pos, unsigned len)
+static bool nfs_full_page_write(struct page *page, loff_t pos, unsigned int len)
 {
 	unsigned int pglen = nfs_page_length(page);
 	unsigned int offset = pos & (PAGE_SIZE - 1);
 	unsigned int end = offset + len;
 
-	if (pnfs_ld_read_whole_page(file->f_mapping->host)) {
-		if (!PageUptodate(page))
-			return 1;
-		return 0;
-	}
+	return !pglen || (end >= pglen && !offset);
+}
 
-	if ((file->f_mode & FMODE_READ) &&	/* open for read? */
-	    !PageUptodate(page) &&		/* Uptodate? */
-	    !PagePrivate(page) &&		/* i/o request already? */
-	    pglen &&				/* valid bytes of file? */
-	    (end < pglen || offset))		/* replace all valid bytes? */
-		return 1;
-	return 0;
+static bool nfs_want_read_modify_write(struct file *file, struct page *page,
+			loff_t pos, unsigned int len)
+{
+	/*
+	 * Up-to-date pages, those with ongoing or full-page write
+	 * don't need read/modify/write
+	 */
+	if (PageUptodate(page) || PagePrivate(page) ||
+	    nfs_full_page_write(page, pos, len))
+		return false;
+
+	if (pnfs_ld_read_whole_page(file->f_mapping->host))
+		return true;
+	/* Open for reading too? */
+	if (file->f_mode & FMODE_READ)
+		return true;
+	return false;
 }
 
 /*
@@ -588,8 +585,7 @@ static int nfs_need_check_write(struct file *filp, struct inode *inode)
 	struct nfs_open_context *ctx;
 
 	ctx = nfs_file_open_context(filp);
-	if (test_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags) ||
-	    nfs_ctx_key_to_expire(ctx, inode))
+	if (nfs_ctx_key_to_expire(ctx, inode))
 		return 1;
 	return 0;
 }
@@ -643,7 +639,7 @@ ssize_t nfs_file_write(struct kiocb *iocb, struct iov_iter *from)
 
 	/* Return error values */
 	if (nfs_need_check_write(file, inode)) {
-		int err = vfs_fsync(file, 0);
+		int err = nfs_wb_all(inode);
 		if (err < 0)
 			result = err;
 	}
@@ -697,7 +693,7 @@ do_unlk(struct file *filp, int cmd, struct file_lock *fl, int is_local)
 	 * Flush all pending writes before doing anything
 	 * with locks..
 	 */
-	vfs_fsync(filp, 0);
+	nfs_wb_all(inode);
 
 	l_ctx = nfs_get_lock_context(nfs_file_open_context(filp));
 	if (!IS_ERR(l_ctx)) {
diff --git a/fs/nfs/filelayout/Makefile b/fs/nfs/filelayout/Makefile
index 8516cdffb9e9..de056312d374 100644
--- a/fs/nfs/filelayout/Makefile
+++ b/fs/nfs/filelayout/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the pNFS Files Layout Driver kernel module
 #
diff --git a/fs/nfs/filelayout/filelayout.c b/fs/nfs/filelayout/filelayout.c
index 61f46facb39c..3cb073c50fa6 100644
--- a/fs/nfs/filelayout/filelayout.c
+++ b/fs/nfs/filelayout/filelayout.c
@@ -904,7 +904,7 @@ fl_pnfs_update_layout(struct inode *ino,
 	status = filelayout_check_deviceid(lo, fl, gfp_flags);
 	if (status) {
 		pnfs_put_lseg(lseg);
-		lseg = ERR_PTR(status);
+		lseg = NULL;
 	}
 out:
 	return lseg;
@@ -917,7 +917,7 @@ filelayout_pg_init_read(struct nfs_pageio_descriptor *pgio,
 	pnfs_generic_pg_check_layout(pgio);
 	if (!pgio->pg_lseg) {
 		pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode,
-						      req->wb_context,
+						      nfs_req_openctx(req),
 						      0,
 						      NFS4_MAX_UINT64,
 						      IOMODE_READ,
@@ -944,7 +944,7 @@ filelayout_pg_init_write(struct nfs_pageio_descriptor *pgio,
 	pnfs_generic_pg_check_layout(pgio);
 	if (!pgio->pg_lseg) {
 		pgio->pg_lseg = fl_pnfs_update_layout(pgio->pg_inode,
-						      req->wb_context,
+						      nfs_req_openctx(req),
 						      0,
 						      NFS4_MAX_UINT64,
 						      IOMODE_RW,
diff --git a/fs/nfs/flexfilelayout/Makefile b/fs/nfs/flexfilelayout/Makefile
index 1d2c9f6bbcd4..49f03422b6ad 100644
--- a/fs/nfs/flexfilelayout/Makefile
+++ b/fs/nfs/flexfilelayout/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the pNFS Flexfile Layout Driver kernel module
 #
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.c b/fs/nfs/flexfilelayout/flexfilelayout.c
index 63abe705f4ca..bcff3bf5ae09 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.c
+++ b/fs/nfs/flexfilelayout/flexfilelayout.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Module for pnfs flexfile layout driver.
  *
@@ -28,6 +29,8 @@
 #define FF_LAYOUT_POLL_RETRY_MAX     (15*HZ)
 #define FF_LAYOUTRETURN_MAXERR 20
 
+static unsigned short io_maxretrans;
+
 static void ff_layout_read_record_layoutstats_done(struct rpc_task *task,
 		struct nfs_pgio_header *hdr);
 static int ff_layout_mirror_prepare_stats(struct pnfs_layout_hdr *lo,
@@ -410,7 +413,7 @@ ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
 	for (i = 0; i < fls->mirror_array_cnt; i++) {
 		struct nfs4_ff_layout_mirror *mirror;
 		struct cred *kcred;
-		const struct cred *cred;
+		const struct cred __rcu *cred;
 		kuid_t uid;
 		kgid_t gid;
 		u32 ds_count, fh_count, id;
@@ -501,7 +504,7 @@ ff_layout_alloc_lseg(struct pnfs_layout_hdr *lh,
 			goto out_err_free;
 		kcred->fsuid = uid;
 		kcred->fsgid = gid;
-		cred = kcred;
+		cred = RCU_INITIALIZER(kcred);
 
 		if (lgr->range.iomode == IOMODE_READ)
 			rcu_assign_pointer(fls->mirror_array[i]->ro_cred, cred);
@@ -788,30 +791,82 @@ ff_layout_alloc_commit_info(struct pnfs_layout_segment *lseg,
 	}
 }
 
+static void
+ff_layout_mark_ds_unreachable(struct pnfs_layout_segment *lseg, int idx)
+{
+	struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
+
+	if (devid)
+		nfs4_mark_deviceid_unavailable(devid);
+}
+
+static void
+ff_layout_mark_ds_reachable(struct pnfs_layout_segment *lseg, int idx)
+{
+	struct nfs4_deviceid_node *devid = FF_LAYOUT_DEVID_NODE(lseg, idx);
+
+	if (devid)
+		nfs4_mark_deviceid_available(devid);
+}
+
 static struct nfs4_pnfs_ds *
-ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg,
-				  int start_idx,
-				  int *best_idx)
+ff_layout_choose_ds_for_read(struct pnfs_layout_segment *lseg,
+			     int start_idx, int *best_idx,
+			     bool check_device)
 {
 	struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
+	struct nfs4_ff_layout_mirror *mirror;
 	struct nfs4_pnfs_ds *ds;
 	bool fail_return = false;
 	int idx;
 
-	/* mirrors are sorted by efficiency */
+	/* mirrors are initially sorted by efficiency */
 	for (idx = start_idx; idx < fls->mirror_array_cnt; idx++) {
 		if (idx+1 == fls->mirror_array_cnt)
-			fail_return = true;
-		ds = nfs4_ff_layout_prepare_ds(lseg, idx, fail_return);
-		if (ds) {
-			*best_idx = idx;
-			return ds;
-		}
+			fail_return = !check_device;
+
+		mirror = FF_LAYOUT_COMP(lseg, idx);
+		ds = nfs4_ff_layout_prepare_ds(lseg, mirror, fail_return);
+		if (!ds)
+			continue;
+
+		if (check_device &&
+		    nfs4_test_deviceid_unavailable(&mirror->mirror_ds->id_node))
+			continue;
+
+		*best_idx = idx;
+		return ds;
 	}
 
 	return NULL;
 }
 
+static struct nfs4_pnfs_ds *
+ff_layout_choose_any_ds_for_read(struct pnfs_layout_segment *lseg,
+				 int start_idx, int *best_idx)
+{
+	return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, false);
+}
+
+static struct nfs4_pnfs_ds *
+ff_layout_choose_valid_ds_for_read(struct pnfs_layout_segment *lseg,
+				   int start_idx, int *best_idx)
+{
+	return ff_layout_choose_ds_for_read(lseg, start_idx, best_idx, true);
+}
+
+static struct nfs4_pnfs_ds *
+ff_layout_choose_best_ds_for_read(struct pnfs_layout_segment *lseg,
+				  int start_idx, int *best_idx)
+{
+	struct nfs4_pnfs_ds *ds;
+
+	ds = ff_layout_choose_valid_ds_for_read(lseg, start_idx, best_idx);
+	if (ds)
+		return ds;
+	return ff_layout_choose_any_ds_for_read(lseg, start_idx, best_idx);
+}
+
 static void
 ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio,
 		      struct nfs_page *req,
@@ -819,7 +874,7 @@ ff_layout_pg_get_read(struct nfs_pageio_descriptor *pgio,
 {
 	pnfs_put_lseg(pgio->pg_lseg);
 	pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
-					   req->wb_context,
+					   nfs_req_openctx(req),
 					   0,
 					   NFS4_MAX_UINT64,
 					   IOMODE_READ,
@@ -873,6 +928,7 @@ retry:
 	pgm = &pgio->pg_mirrors[0];
 	pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].rsize;
 
+	pgio->pg_maxretrans = io_maxretrans;
 	return;
 out_nolseg:
 	if (pgio->pg_error < 0)
@@ -898,7 +954,7 @@ retry:
 	pnfs_generic_pg_check_layout(pgio);
 	if (!pgio->pg_lseg) {
 		pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
-						   req->wb_context,
+						   nfs_req_openctx(req),
 						   0,
 						   NFS4_MAX_UINT64,
 						   IOMODE_RW,
@@ -925,7 +981,8 @@ retry:
 		goto out_mds;
 
 	for (i = 0; i < pgio->pg_mirror_count; i++) {
-		ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, i, true);
+		mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
+		ds = nfs4_ff_layout_prepare_ds(pgio->pg_lseg, mirror, true);
 		if (!ds) {
 			if (!ff_layout_no_fallback_to_mds(pgio->pg_lseg))
 				goto out_mds;
@@ -936,10 +993,10 @@ retry:
 			goto retry;
 		}
 		pgm = &pgio->pg_mirrors[i];
-		mirror = FF_LAYOUT_COMP(pgio->pg_lseg, i);
 		pgm->pg_bsize = mirror->mirror_ds->ds_versions[0].wsize;
 	}
 
+	pgio->pg_maxretrans = io_maxretrans;
 	return;
 
 out_mds:
@@ -954,7 +1011,7 @@ ff_layout_pg_get_mirror_count_write(struct nfs_pageio_descriptor *pgio,
 {
 	if (!pgio->pg_lseg) {
 		pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
-						   req->wb_context,
+						   nfs_req_openctx(req),
 						   0,
 						   NFS4_MAX_UINT64,
 						   IOMODE_RW,
@@ -1071,6 +1128,8 @@ static int ff_layout_async_handle_error_v4(struct rpc_task *task,
 		break;
 	case -NFS4ERR_RETRY_UNCACHED_REP:
 		break;
+	case -EAGAIN:
+		return -NFS4ERR_RESET_TO_PNFS;
 	/* Invalidate Layout errors */
 	case -NFS4ERR_PNFS_NO_LAYOUT:
 	case -ESTALE:           /* mapped NFS4ERR_STALE */
@@ -1131,6 +1190,7 @@ static int ff_layout_async_handle_error_v3(struct rpc_task *task,
 	case -EBADHANDLE:
 	case -ELOOP:
 	case -ENOSPC:
+	case -EAGAIN:
 		break;
 	case -EJUKEBOX:
 		nfs_inc_stats(lseg->pls_layout->plh_inode, NFSIOS_DELAY);
@@ -1158,8 +1218,10 @@ static int ff_layout_async_handle_error(struct rpc_task *task,
 {
 	int vers = clp->cl_nfs_mod->rpc_vers->number;
 
-	if (task->tk_status >= 0)
+	if (task->tk_status >= 0) {
+		ff_layout_mark_ds_reachable(lseg, idx);
 		return 0;
+	}
 
 	/* Handle the case of an invalid layout segment */
 	if (!pnfs_is_valid_lseg(lseg))
@@ -1222,6 +1284,8 @@ static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
 	err = ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
 				       mirror, offset, length, status, opnum,
 				       GFP_NOIO);
+	if (status == NFS4ERR_NXIO)
+		ff_layout_mark_ds_unreachable(lseg, idx);
 	pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode, lseg);
 	dprintk("%s: err %d op %d status %u\n", __func__, err, opnum, status);
 }
@@ -1230,6 +1294,7 @@ static void ff_layout_io_track_ds_error(struct pnfs_layout_segment *lseg,
 static int ff_layout_read_done_cb(struct rpc_task *task,
 				struct nfs_pgio_header *hdr)
 {
+	int new_idx = hdr->pgio_mirror_idx;
 	int err;
 
 	trace_nfs4_pnfs_read(hdr, task->tk_status);
@@ -1248,8 +1313,8 @@ static int ff_layout_read_done_cb(struct rpc_task *task,
 	case -NFS4ERR_RESET_TO_PNFS:
 		if (ff_layout_choose_best_ds_for_read(hdr->lseg,
 					hdr->pgio_mirror_idx + 1,
-					&hdr->pgio_mirror_idx))
-			goto out_eagain;
+					&new_idx))
+			goto out_layouterror;
 		set_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags);
 		return task->tk_status;
 	case -NFS4ERR_RESET_TO_MDS:
@@ -1260,6 +1325,10 @@ static int ff_layout_read_done_cb(struct rpc_task *task,
 	}
 
 	return 0;
+out_layouterror:
+	ff_layout_read_record_layoutstats_done(task, hdr);
+	ff_layout_send_layouterror(hdr->lseg);
+	hdr->pgio_mirror_idx = new_idx;
 out_eagain:
 	rpc_restart_call_prepare(task);
 	return -EAGAIN;
@@ -1293,15 +1362,6 @@ ff_layout_set_layoutcommit(struct inode *inode,
 		(unsigned long long) NFS_I(inode)->layout->plh_lwb);
 }
 
-static bool
-ff_layout_device_unavailable(struct pnfs_layout_segment *lseg, int idx)
-{
-	/* No mirroring for now */
-	struct nfs4_deviceid_node *node = FF_LAYOUT_DEVID_NODE(lseg, idx);
-
-	return ff_layout_test_devid_unavailable(node);
-}
-
 static void ff_layout_read_record_layoutstats_start(struct rpc_task *task,
 		struct nfs_pgio_header *hdr)
 {
@@ -1332,10 +1392,6 @@ static int ff_layout_read_prepare_common(struct rpc_task *task,
 		rpc_exit(task, -EIO);
 		return -EIO;
 	}
-	if (ff_layout_device_unavailable(hdr->lseg, hdr->pgio_mirror_idx)) {
-		rpc_exit(task, -EHOSTDOWN);
-		return -EAGAIN;
-	}
 
 	ff_layout_read_record_layoutstats_start(task, hdr);
 	return 0;
@@ -1369,6 +1425,16 @@ static void ff_layout_read_prepare_v4(struct rpc_task *task, void *data)
 	ff_layout_read_prepare_common(task, hdr);
 }
 
+static void
+ff_layout_io_prepare_transmit(struct rpc_task *task,
+		void *data)
+{
+	struct nfs_pgio_header *hdr = data;
+
+	if (!pnfs_is_valid_lseg(hdr->lseg))
+		rpc_exit(task, -EAGAIN);
+}
+
 static void ff_layout_read_call_done(struct rpc_task *task, void *data)
 {
 	struct nfs_pgio_header *hdr = data;
@@ -1399,9 +1465,10 @@ static void ff_layout_read_release(void *data)
 	struct nfs_pgio_header *hdr = data;
 
 	ff_layout_read_record_layoutstats_done(&hdr->task, hdr);
-	if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags))
+	if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) {
+		ff_layout_send_layouterror(hdr->lseg);
 		pnfs_read_resend_pnfs(hdr);
-	else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
+	} else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
 		ff_layout_reset_read(hdr);
 	pnfs_generic_rw_release(data);
 }
@@ -1513,11 +1580,6 @@ static int ff_layout_write_prepare_common(struct rpc_task *task,
 		return -EIO;
 	}
 
-	if (ff_layout_device_unavailable(hdr->lseg, hdr->pgio_mirror_idx)) {
-		rpc_exit(task, -EHOSTDOWN);
-		return -EAGAIN;
-	}
-
 	ff_layout_write_record_layoutstats_start(task, hdr);
 	return 0;
 }
@@ -1573,9 +1635,10 @@ static void ff_layout_write_release(void *data)
 	struct nfs_pgio_header *hdr = data;
 
 	ff_layout_write_record_layoutstats_done(&hdr->task, hdr);
-	if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags))
+	if (test_bit(NFS_IOHDR_RESEND_PNFS, &hdr->flags)) {
+		ff_layout_send_layouterror(hdr->lseg);
 		ff_layout_reset_write(hdr, true);
-	else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
+	} else if (test_bit(NFS_IOHDR_RESEND_MDS, &hdr->flags))
 		ff_layout_reset_write(hdr, false);
 	pnfs_generic_rw_release(data);
 }
@@ -1657,6 +1720,7 @@ static void ff_layout_commit_release(void *data)
 
 static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
 	.rpc_call_prepare = ff_layout_read_prepare_v3,
+	.rpc_call_prepare_transmit = ff_layout_io_prepare_transmit,
 	.rpc_call_done = ff_layout_read_call_done,
 	.rpc_count_stats = ff_layout_read_count_stats,
 	.rpc_release = ff_layout_read_release,
@@ -1664,6 +1728,7 @@ static const struct rpc_call_ops ff_layout_read_call_ops_v3 = {
 
 static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
 	.rpc_call_prepare = ff_layout_read_prepare_v4,
+	.rpc_call_prepare_transmit = ff_layout_io_prepare_transmit,
 	.rpc_call_done = ff_layout_read_call_done,
 	.rpc_count_stats = ff_layout_read_count_stats,
 	.rpc_release = ff_layout_read_release,
@@ -1671,6 +1736,7 @@ static const struct rpc_call_ops ff_layout_read_call_ops_v4 = {
 
 static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
 	.rpc_call_prepare = ff_layout_write_prepare_v3,
+	.rpc_call_prepare_transmit = ff_layout_io_prepare_transmit,
 	.rpc_call_done = ff_layout_write_call_done,
 	.rpc_count_stats = ff_layout_write_count_stats,
 	.rpc_release = ff_layout_write_release,
@@ -1678,6 +1744,7 @@ static const struct rpc_call_ops ff_layout_write_call_ops_v3 = {
 
 static const struct rpc_call_ops ff_layout_write_call_ops_v4 = {
 	.rpc_call_prepare = ff_layout_write_prepare_v4,
+	.rpc_call_prepare_transmit = ff_layout_io_prepare_transmit,
 	.rpc_call_done = ff_layout_write_call_done,
 	.rpc_count_stats = ff_layout_write_count_stats,
 	.rpc_release = ff_layout_write_release,
@@ -1703,6 +1770,7 @@ ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
 	struct pnfs_layout_segment *lseg = hdr->lseg;
 	struct nfs4_pnfs_ds *ds;
 	struct rpc_clnt *ds_clnt;
+	struct nfs4_ff_layout_mirror *mirror;
 	const struct cred *ds_cred;
 	loff_t offset = hdr->args.offset;
 	u32 idx = hdr->pgio_mirror_idx;
@@ -1713,20 +1781,21 @@ ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
 		__func__, hdr->inode->i_ino,
 		hdr->args.pgbase, (size_t)hdr->args.count, offset);
 
-	ds = nfs4_ff_layout_prepare_ds(lseg, idx, false);
+	mirror = FF_LAYOUT_COMP(lseg, idx);
+	ds = nfs4_ff_layout_prepare_ds(lseg, mirror, false);
 	if (!ds)
 		goto out_failed;
 
-	ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
+	ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
 						   hdr->inode);
 	if (IS_ERR(ds_clnt))
 		goto out_failed;
 
-	ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred);
+	ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
 	if (!ds_cred)
 		goto out_failed;
 
-	vers = nfs4_ff_layout_ds_version(lseg, idx);
+	vers = nfs4_ff_layout_ds_version(mirror);
 
 	dprintk("%s USE DS: %s cl_count %d vers %d\n", __func__,
 		ds->ds_remotestr, refcount_read(&ds->ds_clp->cl_count), vers);
@@ -1734,13 +1803,11 @@ ff_layout_read_pagelist(struct nfs_pgio_header *hdr)
 	hdr->pgio_done_cb = ff_layout_read_done_cb;
 	refcount_inc(&ds->ds_clp->cl_count);
 	hdr->ds_clp = ds->ds_clp;
-	fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
+	fh = nfs4_ff_layout_select_ds_fh(mirror);
 	if (fh)
 		hdr->args.fh = fh;
 
-	if (vers == 4 &&
-		!nfs4_ff_layout_select_ds_stateid(lseg, idx, &hdr->args.stateid))
-		goto out_failed;
+	nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
 
 	/*
 	 * Note that if we ever decide to split across DSes,
@@ -1770,26 +1837,28 @@ ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
 	struct pnfs_layout_segment *lseg = hdr->lseg;
 	struct nfs4_pnfs_ds *ds;
 	struct rpc_clnt *ds_clnt;
+	struct nfs4_ff_layout_mirror *mirror;
 	const struct cred *ds_cred;
 	loff_t offset = hdr->args.offset;
 	int vers;
 	struct nfs_fh *fh;
 	int idx = hdr->pgio_mirror_idx;
 
-	ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);
+	mirror = FF_LAYOUT_COMP(lseg, idx);
+	ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
 	if (!ds)
 		goto out_failed;
 
-	ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
+	ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
 						   hdr->inode);
 	if (IS_ERR(ds_clnt))
 		goto out_failed;
 
-	ds_cred = ff_layout_get_ds_cred(lseg, idx, hdr->cred);
+	ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, hdr->cred);
 	if (!ds_cred)
 		goto out_failed;
 
-	vers = nfs4_ff_layout_ds_version(lseg, idx);
+	vers = nfs4_ff_layout_ds_version(mirror);
 
 	dprintk("%s ino %lu sync %d req %zu@%llu DS: %s cl_count %d vers %d\n",
 		__func__, hdr->inode->i_ino, sync, (size_t) hdr->args.count,
@@ -1800,13 +1869,11 @@ ff_layout_write_pagelist(struct nfs_pgio_header *hdr, int sync)
 	refcount_inc(&ds->ds_clp->cl_count);
 	hdr->ds_clp = ds->ds_clp;
 	hdr->ds_commit_idx = idx;
-	fh = nfs4_ff_layout_select_ds_fh(lseg, idx);
+	fh = nfs4_ff_layout_select_ds_fh(mirror);
 	if (fh)
 		hdr->args.fh = fh;
 
-	if (vers == 4 &&
-		!nfs4_ff_layout_select_ds_stateid(lseg, idx, &hdr->args.stateid))
-		goto out_failed;
+	nfs4_ff_layout_select_ds_stateid(mirror, &hdr->args.stateid);
 
 	/*
 	 * Note that if we ever decide to split across DSes,
@@ -1849,6 +1916,7 @@ static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
 	struct pnfs_layout_segment *lseg = data->lseg;
 	struct nfs4_pnfs_ds *ds;
 	struct rpc_clnt *ds_clnt;
+	struct nfs4_ff_layout_mirror *mirror;
 	const struct cred *ds_cred;
 	u32 idx;
 	int vers, ret;
@@ -1859,20 +1927,21 @@ static int ff_layout_initiate_commit(struct nfs_commit_data *data, int how)
 		goto out_err;
 
 	idx = calc_ds_index_from_commit(lseg, data->ds_commit_index);
-	ds = nfs4_ff_layout_prepare_ds(lseg, idx, true);
+	mirror = FF_LAYOUT_COMP(lseg, idx);
+	ds = nfs4_ff_layout_prepare_ds(lseg, mirror, true);
 	if (!ds)
 		goto out_err;
 
-	ds_clnt = nfs4_ff_find_or_create_ds_client(lseg, idx, ds->ds_clp,
+	ds_clnt = nfs4_ff_find_or_create_ds_client(mirror, ds->ds_clp,
 						   data->inode);
 	if (IS_ERR(ds_clnt))
 		goto out_err;
 
-	ds_cred = ff_layout_get_ds_cred(lseg, idx, data->cred);
+	ds_cred = ff_layout_get_ds_cred(mirror, &lseg->pls_range, data->cred);
 	if (!ds_cred)
 		goto out_err;
 
-	vers = nfs4_ff_layout_ds_version(lseg, idx);
+	vers = nfs4_ff_layout_ds_version(mirror);
 
 	dprintk("%s ino %lu, how %d cl_count %d vers %d\n", __func__,
 		data->inode->i_ino, how, refcount_read(&ds->ds_clp->cl_count),
@@ -2036,7 +2105,7 @@ ff_layout_encode_layoutreturn(struct xdr_stream *xdr,
 
 	dprintk("%s: Begin\n", __func__);
 
-	xdr_init_encode(&tmp_xdr, &tmp_buf, NULL);
+	xdr_init_encode(&tmp_xdr, &tmp_buf, NULL, NULL);
 
 	ff_layout_encode_ioerr(&tmp_xdr, args, ff_args);
 	ff_layout_encode_iostats_array(&tmp_xdr, args, ff_args);
@@ -2102,6 +2171,52 @@ out_nomem:
 	return -ENOMEM;
 }
 
+#ifdef CONFIG_NFS_V4_2
+void
+ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
+{
+	struct pnfs_layout_hdr *lo = lseg->pls_layout;
+	struct nfs42_layout_error *errors;
+	LIST_HEAD(head);
+
+	if (!nfs_server_capable(lo->plh_inode, NFS_CAP_LAYOUTERROR))
+		return;
+	ff_layout_fetch_ds_ioerr(lo, &lseg->pls_range, &head, -1);
+	if (list_empty(&head))
+		return;
+
+	errors = kmalloc_array(NFS42_LAYOUTERROR_MAX,
+			sizeof(*errors), GFP_NOFS);
+	if (errors != NULL) {
+		const struct nfs4_ff_layout_ds_err *pos;
+		size_t n = 0;
+
+		list_for_each_entry(pos, &head, list) {
+			errors[n].offset = pos->offset;
+			errors[n].length = pos->length;
+			nfs4_stateid_copy(&errors[n].stateid, &pos->stateid);
+			errors[n].errors[0].dev_id = pos->deviceid;
+			errors[n].errors[0].status = pos->status;
+			errors[n].errors[0].opnum = pos->opnum;
+			n++;
+			if (!list_is_last(&pos->list, &head) &&
+			    n < NFS42_LAYOUTERROR_MAX)
+				continue;
+			if (nfs42_proc_layouterror(lseg, errors, n) < 0)
+				break;
+			n = 0;
+		}
+		kfree(errors);
+	}
+	ff_layout_free_ds_ioerr(&head);
+}
+#else
+void
+ff_layout_send_layouterror(struct pnfs_layout_segment *lseg)
+{
+}
+#endif
+
 static int
 ff_layout_ntop4(const struct sockaddr *sap, char *buf, const size_t buflen)
 {
@@ -2405,3 +2520,7 @@ MODULE_DESCRIPTION("The NFSv4 flexfile layout driver");
 
 module_init(nfs4flexfilelayout_init);
 module_exit(nfs4flexfilelayout_exit);
+
+module_param(io_maxretrans, ushort, 0644);
+MODULE_PARM_DESC(io_maxretrans, "The  number of times the NFSv4.1 client "
+			"retries an I/O request before returning an error. ");
diff --git a/fs/nfs/flexfilelayout/flexfilelayout.h b/fs/nfs/flexfilelayout/flexfilelayout.h
index c2626bad466b..2f369966abf7 100644
--- a/fs/nfs/flexfilelayout/flexfilelayout.h
+++ b/fs/nfs/flexfilelayout/flexfilelayout.h
@@ -132,16 +132,6 @@ FF_LAYOUT_LSEG(struct pnfs_layout_segment *lseg)
 			    generic_hdr);
 }
 
-static inline struct nfs4_deviceid_node *
-FF_LAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg, u32 idx)
-{
-	if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt ||
-	    FF_LAYOUT_LSEG(lseg)->mirror_array[idx] == NULL ||
-	    FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds == NULL)
-		return NULL;
-	return &FF_LAYOUT_LSEG(lseg)->mirror_array[idx]->mirror_ds->id_node;
-}
-
 static inline struct nfs4_ff_layout_ds *
 FF_LAYOUT_MIRROR_DS(struct nfs4_deviceid_node *node)
 {
@@ -151,9 +141,25 @@ FF_LAYOUT_MIRROR_DS(struct nfs4_deviceid_node *node)
 static inline struct nfs4_ff_layout_mirror *
 FF_LAYOUT_COMP(struct pnfs_layout_segment *lseg, u32 idx)
 {
-	if (idx >= FF_LAYOUT_LSEG(lseg)->mirror_array_cnt)
-		return NULL;
-	return FF_LAYOUT_LSEG(lseg)->mirror_array[idx];
+	struct nfs4_ff_layout_segment *fls = FF_LAYOUT_LSEG(lseg);
+
+	if (idx < fls->mirror_array_cnt)
+		return fls->mirror_array[idx];
+	return NULL;
+}
+
+static inline struct nfs4_deviceid_node *
+FF_LAYOUT_DEVID_NODE(struct pnfs_layout_segment *lseg, u32 idx)
+{
+	struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, idx);
+
+	if (mirror != NULL) {
+		struct nfs4_ff_layout_ds *mirror_ds = mirror->mirror_ds;
+
+		if (!IS_ERR_OR_NULL(mirror_ds))
+			return &mirror_ds->id_node;
+	}
+	return NULL;
 }
 
 static inline u32
@@ -174,28 +180,10 @@ ff_layout_no_read_on_rw(struct pnfs_layout_segment *lseg)
 	return FF_LAYOUT_LSEG(lseg)->flags & FF_FLAGS_NO_READ_IO;
 }
 
-static inline bool
-ff_layout_test_devid_unavailable(struct nfs4_deviceid_node *node)
-{
-	/*
-	 * Flexfiles should never mark a DS unavailable, but if it does
-	 * print a (ratelimited) warning as this can affect performance.
-	 */
-	if (nfs4_test_deviceid_unavailable(node)) {
-		u32 *p = (u32 *)node->deviceid.data;
-
-		pr_warn_ratelimited("NFS: flexfiles layout referencing an "
-				"unavailable device [%x%x%x%x]\n",
-				p[0], p[1], p[2], p[3]);
-		return true;
-	}
-	return false;
-}
-
 static inline int
-nfs4_ff_layout_ds_version(struct pnfs_layout_segment *lseg, u32 ds_idx)
+nfs4_ff_layout_ds_version(const struct nfs4_ff_layout_mirror *mirror)
 {
-	return FF_LAYOUT_COMP(lseg, ds_idx)->mirror_ds->ds_versions[0].version;
+	return mirror->mirror_ds->ds_versions[0].version;
 }
 
 struct nfs4_ff_layout_ds *
@@ -207,6 +195,7 @@ int ff_layout_track_ds_error(struct nfs4_flexfile_layout *flo,
 			     struct nfs4_ff_layout_mirror *mirror, u64 offset,
 			     u64 length, int status, enum nfs_opnum4 opnum,
 			     gfp_t gfp_flags);
+void ff_layout_send_layouterror(struct pnfs_layout_segment *lseg);
 int ff_layout_encode_ds_ioerr(struct xdr_stream *xdr, const struct list_head *head);
 void ff_layout_free_ds_ioerr(struct list_head *head);
 unsigned int ff_layout_fetch_ds_ioerr(struct pnfs_layout_hdr *lo,
@@ -214,23 +203,23 @@ unsigned int ff_layout_fetch_ds_ioerr(struct pnfs_layout_hdr *lo,
 		struct list_head *head,
 		unsigned int maxnum);
 struct nfs_fh *
-nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx);
-int
-nfs4_ff_layout_select_ds_stateid(struct pnfs_layout_segment *lseg,
-				u32 mirror_idx,
-				nfs4_stateid *stateid);
+nfs4_ff_layout_select_ds_fh(struct nfs4_ff_layout_mirror *mirror);
+void
+nfs4_ff_layout_select_ds_stateid(const struct nfs4_ff_layout_mirror *mirror,
+		nfs4_stateid *stateid);
 
 struct nfs4_pnfs_ds *
-nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,
+nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg,
+			  struct nfs4_ff_layout_mirror *mirror,
 			  bool fail_return);
 
 struct rpc_clnt *
-nfs4_ff_find_or_create_ds_client(struct pnfs_layout_segment *lseg,
-				 u32 ds_idx,
+nfs4_ff_find_or_create_ds_client(struct nfs4_ff_layout_mirror *mirror,
 				 struct nfs_client *ds_clp,
 				 struct inode *inode);
-const struct cred *ff_layout_get_ds_cred(struct pnfs_layout_segment *lseg,
-				       u32 ds_idx, const struct cred *mdscred);
+const struct cred *ff_layout_get_ds_cred(struct nfs4_ff_layout_mirror *mirror,
+					 const struct pnfs_layout_range *range,
+					 const struct cred *mdscred);
 bool ff_layout_avoid_mds_available_ds(struct pnfs_layout_segment *lseg);
 bool ff_layout_avoid_read_on_rw(struct pnfs_layout_segment *lseg);
 
diff --git a/fs/nfs/flexfilelayout/flexfilelayoutdev.c b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
index 11766a74216d..19f856f45689 100644
--- a/fs/nfs/flexfilelayout/flexfilelayoutdev.c
+++ b/fs/nfs/flexfilelayout/flexfilelayoutdev.c
@@ -18,7 +18,7 @@
 
 #define NFSDBG_FACILITY		NFSDBG_PNFS_LD
 
-static unsigned int dataserver_timeo = NFS_DEF_TCP_RETRANS;
+static unsigned int dataserver_timeo = NFS_DEF_TCP_TIMEO;
 static unsigned int dataserver_retrans;
 
 static bool ff_layout_has_available_ds(struct pnfs_layout_segment *lseg);
@@ -183,56 +183,6 @@ out_err:
 	return NULL;
 }
 
-static void ff_layout_mark_devid_invalid(struct pnfs_layout_segment *lseg,
-		struct nfs4_deviceid_node *devid)
-{
-	nfs4_delete_deviceid(devid->ld, devid->nfs_client, &devid->deviceid);
-	if (!ff_layout_has_available_ds(lseg))
-		pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode,
-				lseg);
-}
-
-static bool ff_layout_mirror_valid(struct pnfs_layout_segment *lseg,
-				   struct nfs4_ff_layout_mirror *mirror,
-				   bool create)
-{
-	if (mirror == NULL || IS_ERR(mirror->mirror_ds))
-		goto outerr;
-	if (mirror->mirror_ds == NULL) {
-		if (create) {
-			struct nfs4_deviceid_node *node;
-			struct pnfs_layout_hdr *lh = lseg->pls_layout;
-			struct nfs4_ff_layout_ds *mirror_ds = ERR_PTR(-ENODEV);
-
-			node = nfs4_find_get_deviceid(NFS_SERVER(lh->plh_inode),
-					&mirror->devid, lh->plh_lc_cred,
-					GFP_KERNEL);
-			if (node)
-				mirror_ds = FF_LAYOUT_MIRROR_DS(node);
-
-			/* check for race with another call to this function */
-			if (cmpxchg(&mirror->mirror_ds, NULL, mirror_ds) &&
-			    mirror_ds != ERR_PTR(-ENODEV))
-				nfs4_put_deviceid_node(node);
-		} else
-			goto outerr;
-	}
-
-	if (IS_ERR(mirror->mirror_ds))
-		goto outerr;
-
-	if (mirror->mirror_ds->ds == NULL) {
-		struct nfs4_deviceid_node *devid;
-		devid = &mirror->mirror_ds->id_node;
-		ff_layout_mark_devid_invalid(lseg, devid);
-		return false;
-	}
-	return true;
-outerr:
-	pnfs_error_mark_layout_for_return(lseg->pls_layout->plh_inode, lseg);
-	return false;
-}
-
 static void extend_ds_error(struct nfs4_ff_layout_ds_err *err,
 			    u64 offset, u64 length)
 {
@@ -326,7 +276,6 @@ int ff_layout_track_ds_error(struct nfs4_flexfile_layout *flo,
 	spin_lock(&flo->generic_hdr.plh_inode->i_lock);
 	ff_layout_add_ds_error_locked(flo, dserr);
 	spin_unlock(&flo->generic_hdr.plh_inode->i_lock);
-
 	return 0;
 }
 
@@ -353,46 +302,54 @@ ff_layout_get_mirror_cred(struct nfs4_ff_layout_mirror *mirror, u32 iomode)
 }
 
 struct nfs_fh *
-nfs4_ff_layout_select_ds_fh(struct pnfs_layout_segment *lseg, u32 mirror_idx)
+nfs4_ff_layout_select_ds_fh(struct nfs4_ff_layout_mirror *mirror)
 {
-	struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, mirror_idx);
-	struct nfs_fh *fh = NULL;
-
-	if (!ff_layout_mirror_valid(lseg, mirror, false)) {
-		pr_err_ratelimited("NFS: %s: No data server for mirror offset index %d\n",
-			__func__, mirror_idx);
-		goto out;
-	}
-
 	/* FIXME: For now assume there is only 1 version available for the DS */
-	fh = &mirror->fh_versions[0];
-out:
-	return fh;
+	return &mirror->fh_versions[0];
 }
 
-int
-nfs4_ff_layout_select_ds_stateid(struct pnfs_layout_segment *lseg,
-				u32 mirror_idx,
-				nfs4_stateid *stateid)
+void
+nfs4_ff_layout_select_ds_stateid(const struct nfs4_ff_layout_mirror *mirror,
+		nfs4_stateid *stateid)
 {
-	struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, mirror_idx);
+	if (nfs4_ff_layout_ds_version(mirror) == 4)
+		nfs4_stateid_copy(stateid, &mirror->stateid);
+}
 
-	if (!ff_layout_mirror_valid(lseg, mirror, false)) {
-		pr_err_ratelimited("NFS: %s: No data server for mirror offset index %d\n",
-			__func__, mirror_idx);
-		goto out;
+static bool
+ff_layout_init_mirror_ds(struct pnfs_layout_hdr *lo,
+			 struct nfs4_ff_layout_mirror *mirror)
+{
+	if (mirror == NULL)
+		goto outerr;
+	if (mirror->mirror_ds == NULL) {
+		struct nfs4_deviceid_node *node;
+		struct nfs4_ff_layout_ds *mirror_ds = ERR_PTR(-ENODEV);
+
+		node = nfs4_find_get_deviceid(NFS_SERVER(lo->plh_inode),
+				&mirror->devid, lo->plh_lc_cred,
+				GFP_KERNEL);
+		if (node)
+			mirror_ds = FF_LAYOUT_MIRROR_DS(node);
+
+		/* check for race with another call to this function */
+		if (cmpxchg(&mirror->mirror_ds, NULL, mirror_ds) &&
+		    mirror_ds != ERR_PTR(-ENODEV))
+			nfs4_put_deviceid_node(node);
 	}
 
-	nfs4_stateid_copy(stateid, &mirror->stateid);
-	return 1;
-out:
-	return 0;
+	if (IS_ERR(mirror->mirror_ds))
+		goto outerr;
+
+	return true;
+outerr:
+	return false;
 }
 
 /**
  * nfs4_ff_layout_prepare_ds - prepare a DS connection for an RPC call
  * @lseg: the layout segment we're operating on
- * @ds_idx: index of the DS to use
+ * @mirror: layout mirror describing the DS to use
  * @fail_return: return layout on connect failure?
  *
  * Try to prepare a DS connection to accept an RPC call. This involves
@@ -407,26 +364,18 @@ out:
  * Returns a pointer to a connected DS object on success or NULL on failure.
  */
 struct nfs4_pnfs_ds *
-nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,
+nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg,
+			  struct nfs4_ff_layout_mirror *mirror,
 			  bool fail_return)
 {
-	struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, ds_idx);
 	struct nfs4_pnfs_ds *ds = NULL;
-	struct nfs4_deviceid_node *devid;
 	struct inode *ino = lseg->pls_layout->plh_inode;
 	struct nfs_server *s = NFS_SERVER(ino);
 	unsigned int max_payload;
 	int status;
 
-	if (!ff_layout_mirror_valid(lseg, mirror, true)) {
-		pr_err_ratelimited("NFS: %s: No data server for offset index %d\n",
-			__func__, ds_idx);
-		goto out;
-	}
-
-	devid = &mirror->mirror_ds->id_node;
-	if (ff_layout_test_devid_unavailable(devid))
-		goto out_fail;
+	if (!ff_layout_init_mirror_ds(lseg->pls_layout, mirror))
+		goto noconnect;
 
 	ds = mirror->mirror_ds->ds;
 	/* matching smp_wmb() in _nfs4_pnfs_v3/4_ds_connect */
@@ -437,8 +386,8 @@ nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,
 	/* FIXME: For now we assume the server sent only one version of NFS
 	 * to use for the DS.
 	 */
-	status = nfs4_pnfs_ds_connect(s, ds, devid, dataserver_timeo,
-			     dataserver_retrans,
+	status = nfs4_pnfs_ds_connect(s, ds, &mirror->mirror_ds->id_node,
+			     dataserver_timeo, dataserver_retrans,
 			     mirror->mirror_ds->ds_versions[0].version,
 			     mirror->mirror_ds->ds_versions[0].minor_version);
 
@@ -453,11 +402,12 @@ nfs4_ff_layout_prepare_ds(struct pnfs_layout_segment *lseg, u32 ds_idx,
 			mirror->mirror_ds->ds_versions[0].wsize = max_payload;
 		goto out;
 	}
-out_fail:
+noconnect:
 	ff_layout_track_ds_error(FF_LAYOUT_FROM_HDR(lseg->pls_layout),
 				 mirror, lseg->pls_range.offset,
 				 lseg->pls_range.length, NFS4ERR_NXIO,
 				 OP_ILLEGAL, GFP_NOIO);
+	ff_layout_send_layouterror(lseg);
 	if (fail_return || !ff_layout_has_available_ds(lseg))
 		pnfs_error_mark_layout_for_return(ino, lseg);
 	ds = NULL;
@@ -466,14 +416,14 @@ out:
 }
 
 const struct cred *
-ff_layout_get_ds_cred(struct pnfs_layout_segment *lseg, u32 ds_idx,
+ff_layout_get_ds_cred(struct nfs4_ff_layout_mirror *mirror,
+		      const struct pnfs_layout_range *range,
 		      const struct cred *mdscred)
 {
-	struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, ds_idx);
 	const struct cred *cred;
 
 	if (mirror && !mirror->mirror_ds->ds_versions[0].tightly_coupled) {
-		cred = ff_layout_get_mirror_cred(mirror, lseg->pls_range.iomode);
+		cred = ff_layout_get_mirror_cred(mirror, range->iomode);
 		if (!cred)
 			cred = get_cred(mdscred);
 	} else {
@@ -483,15 +433,18 @@ ff_layout_get_ds_cred(struct pnfs_layout_segment *lseg, u32 ds_idx,
 }
 
 /**
-* Find or create a DS rpc client with th MDS server rpc client auth flavor
-* in the nfs_client cl_ds_clients list.
-*/
+ * nfs4_ff_find_or_create_ds_client - Find or create a DS rpc client
+ * @mirror: pointer to the mirror
+ * @ds_clp: nfs_client for the DS
+ * @inode: pointer to inode
+ *
+ * Find or create a DS rpc client with th MDS server rpc client auth flavor
+ * in the nfs_client cl_ds_clients list.
+ */
 struct rpc_clnt *
-nfs4_ff_find_or_create_ds_client(struct pnfs_layout_segment *lseg, u32 ds_idx,
+nfs4_ff_find_or_create_ds_client(struct nfs4_ff_layout_mirror *mirror,
 				 struct nfs_client *ds_clp, struct inode *inode)
 {
-	struct nfs4_ff_layout_mirror *mirror = FF_LAYOUT_COMP(lseg, ds_idx);
-
 	switch (mirror->mirror_ds->ds_versions[0].version) {
 	case 3:
 		/* For NFSv3 DS, flavor is set when creating DS connections */
@@ -608,7 +561,7 @@ static bool ff_read_layout_has_available_ds(struct pnfs_layout_segment *lseg)
 			if (IS_ERR(mirror->mirror_ds))
 				continue;
 			devid = &mirror->mirror_ds->id_node;
-			if (!ff_layout_test_devid_unavailable(devid))
+			if (!nfs4_test_deviceid_unavailable(devid))
 				return true;
 		}
 	}
@@ -629,7 +582,7 @@ static bool ff_rw_layout_has_available_ds(struct pnfs_layout_segment *lseg)
 		if (!mirror->mirror_ds)
 			continue;
 		devid = &mirror->mirror_ds->id_node;
-		if (ff_layout_test_devid_unavailable(devid))
+		if (nfs4_test_deviceid_unavailable(devid))
 			return false;
 	}
 
diff --git a/fs/nfs/fscache-index.c b/fs/nfs/fscache-index.c
index 666415d13d52..15f271401dcc 100644
--- a/fs/nfs/fscache-index.c
+++ b/fs/nfs/fscache-index.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* NFS FS-Cache index structure definition
  *
  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/init.h>
diff --git a/fs/nfs/fscache.c b/fs/nfs/fscache.c
index 4dc887813c71..53507aa96b0b 100644
--- a/fs/nfs/fscache.c
+++ b/fs/nfs/fscache.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* NFS filesystem cache interface
  *
  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #include <linux/init.h>
diff --git a/fs/nfs/fscache.h b/fs/nfs/fscache.h
index 161ba2edb9d0..25a75e40d91d 100644
--- a/fs/nfs/fscache.h
+++ b/fs/nfs/fscache.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* NFS filesystem cache interface definitions
  *
  * Copyright (C) 2008 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public Licence
- * as published by the Free Software Foundation; either version
- * 2 of the Licence, or (at your option) any later version.
  */
 
 #ifndef _NFS_FSCACHE_H
diff --git a/fs/nfs/getroot.c b/fs/nfs/getroot.c
index 391dafaf9182..878c4c5982d9 100644
--- a/fs/nfs/getroot.c
+++ b/fs/nfs/getroot.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* getroot.c: get the root dentry for an NFS mount
  *
  * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/fs/nfs/inode.c b/fs/nfs/inode.c
index 094775ea0781..0b4a1a974411 100644
--- a/fs/nfs/inode.c
+++ b/fs/nfs/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/nfs/inode.c
  *
@@ -143,6 +144,7 @@ EXPORT_SYMBOL_GPL(nfs_sync_inode);
 
 /**
  * nfs_sync_mapping - helper to flush all mmapped dirty data to disk
+ * @mapping: pointer to struct address_space
  */
 int nfs_sync_mapping(struct address_space *mapping)
 {
@@ -884,10 +886,14 @@ struct nfs_lock_context *nfs_get_lock_context(struct nfs_open_context *ctx)
 		spin_lock(&inode->i_lock);
 		res = __nfs_find_lock_context(ctx);
 		if (res == NULL) {
-			list_add_tail_rcu(&new->list, &ctx->lock_context.list);
-			new->open_context = ctx;
-			res = new;
-			new = NULL;
+			new->open_context = get_nfs_open_context(ctx);
+			if (new->open_context) {
+				list_add_tail_rcu(&new->list,
+						&ctx->lock_context.list);
+				res = new;
+				new = NULL;
+			} else
+				res = ERR_PTR(-EBADF);
 		}
 		spin_unlock(&inode->i_lock);
 		kfree(new);
@@ -905,6 +911,7 @@ void nfs_put_lock_context(struct nfs_lock_context *l_ctx)
 		return;
 	list_del_rcu(&l_ctx->list);
 	spin_unlock(&inode->i_lock);
+	put_nfs_open_context(ctx);
 	kfree_rcu(l_ctx, rcu_head);
 }
 EXPORT_SYMBOL_GPL(nfs_put_lock_context);
@@ -1184,8 +1191,8 @@ int nfs_attribute_cache_expired(struct inode *inode)
 
 /**
  * nfs_revalidate_inode - Revalidate the inode attributes
- * @server - pointer to nfs_server struct
- * @inode - pointer to inode struct
+ * @server: pointer to nfs_server struct
+ * @inode: pointer to inode struct
  *
  * Updates inode attribute information by retrieving the data from the server.
  */
@@ -1255,8 +1262,8 @@ out:
 
 /**
  * nfs_revalidate_mapping - Revalidate the pagecache
- * @inode - pointer to host inode
- * @mapping - pointer to mapping
+ * @inode: pointer to host inode
+ * @mapping: pointer to mapping
  */
 int nfs_revalidate_mapping(struct inode *inode,
 		struct address_space *mapping)
@@ -1371,8 +1378,8 @@ static void nfs_wcc_update_inode(struct inode *inode, struct nfs_fattr *fattr)
 
 /**
  * nfs_check_inode_attributes - verify consistency of the inode attribute cache
- * @inode - pointer to inode
- * @fattr - updated attributes
+ * @inode: pointer to inode
+ * @fattr: updated attributes
  *
  * Verifies the attribute cache. If we have just changed the attributes,
  * so that fattr carries weak cache consistency data, then it may
@@ -1572,8 +1579,8 @@ EXPORT_SYMBOL_GPL(_nfs_display_fhandle);
 
 /**
  * nfs_inode_attrs_need_update - check if the inode attributes need updating
- * @inode - pointer to inode
- * @fattr - attributes
+ * @inode: pointer to inode
+ * @fattr: attributes
  *
  * Attempt to divine whether or not an RPC call reply carrying stale
  * attributes got scheduled after another call carrying updated ones.
@@ -1614,8 +1621,8 @@ static int nfs_refresh_inode_locked(struct inode *inode, struct nfs_fattr *fattr
 
 /**
  * nfs_refresh_inode - try to update the inode attribute cache
- * @inode - pointer to inode
- * @fattr - updated attributes
+ * @inode: pointer to inode
+ * @fattr: updated attributes
  *
  * Check that an RPC call that returned attributes has not overlapped with
  * other recent updates of the inode metadata, then decide whether it is
@@ -1649,8 +1656,8 @@ static int nfs_post_op_update_inode_locked(struct inode *inode,
 
 /**
  * nfs_post_op_update_inode - try to update the inode attribute cache
- * @inode - pointer to inode
- * @fattr - updated attributes
+ * @inode: pointer to inode
+ * @fattr: updated attributes
  *
  * After an operation that has changed the inode metadata, mark the
  * attribute cache as being invalid, then try to update it.
@@ -1679,8 +1686,8 @@ EXPORT_SYMBOL_GPL(nfs_post_op_update_inode);
 
 /**
  * nfs_post_op_update_inode_force_wcc_locked - update the inode attribute cache
- * @inode - pointer to inode
- * @fattr - updated attributes
+ * @inode: pointer to inode
+ * @fattr: updated attributes
  *
  * After an operation that has changed the inode metadata, mark the
  * attribute cache as being invalid, then try to update it. Fake up
@@ -1731,8 +1738,8 @@ out_noforce:
 
 /**
  * nfs_post_op_update_inode_force_wcc - try to update the inode attribute cache
- * @inode - pointer to inode
- * @fattr - updated attributes
+ * @inode: pointer to inode
+ * @fattr: updated attributes
  *
  * After an operation that has changed the inode metadata, mark the
  * attribute cache as being invalid, then try to update it. Fake up
@@ -2054,17 +2061,11 @@ struct inode *nfs_alloc_inode(struct super_block *sb)
 }
 EXPORT_SYMBOL_GPL(nfs_alloc_inode);
 
-static void nfs_i_callback(struct rcu_head *head)
+void nfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(nfs_inode_cachep, NFS_I(inode));
 }
-
-void nfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, nfs_i_callback);
-}
-EXPORT_SYMBOL_GPL(nfs_destroy_inode);
+EXPORT_SYMBOL_GPL(nfs_free_inode);
 
 static inline void nfs4_init_once(struct nfs_inode *nfsi)
 {
diff --git a/fs/nfs/internal.h b/fs/nfs/internal.h
index b1e577302518..498fab72f70b 100644
--- a/fs/nfs/internal.h
+++ b/fs/nfs/internal.h
@@ -69,7 +69,8 @@ struct nfs_clone_mount {
  * Maximum number of pages that readdir can use for creating
  * a vmapped array of pages.
  */
-#define NFS_MAX_READDIR_PAGES 8
+#define NFS_MAX_READDIR_PAGES 64
+#define NFS_MAX_READDIR_RAPAGES 8
 
 struct nfs_client_initdata {
 	unsigned long init_flags;
@@ -83,6 +84,7 @@ struct nfs_client_initdata {
 	u32 minorversion;
 	struct net *net;
 	const struct rpc_timeout *timeparms;
+	const struct cred *cred;
 };
 
 /*
@@ -380,7 +382,7 @@ int nfs_check_flags(int);
 /* inode.c */
 extern struct workqueue_struct *nfsiod_workqueue;
 extern struct inode *nfs_alloc_inode(struct super_block *sb);
-extern void nfs_destroy_inode(struct inode *);
+extern void nfs_free_inode(struct inode *);
 extern int nfs_write_inode(struct inode *, struct writeback_control *);
 extern int nfs_drop_inode(struct inode *);
 extern void nfs_clear_inode(struct inode *);
@@ -755,6 +757,7 @@ static inline bool nfs_error_is_fatal(int err)
 {
 	switch (err) {
 	case -ERESTARTSYS:
+	case -EINTR:
 	case -EACCES:
 	case -EDQUOT:
 	case -EFBIG:
@@ -763,15 +766,11 @@ static inline bool nfs_error_is_fatal(int err)
 	case -EROFS:
 	case -ESTALE:
 	case -E2BIG:
+	case -ENOMEM:
+	case -ETIMEDOUT:
 		return true;
 	default:
 		return false;
 	}
 }
 
-static inline void nfs_context_set_write_error(struct nfs_open_context *ctx, int error)
-{
-	ctx->error = error;
-	smp_wmb();
-	set_bit(NFS_CONTEXT_ERROR_WRITE, &ctx->flags);
-}
diff --git a/fs/nfs/io.c b/fs/nfs/io.c
index 9034b4926909..5088fda9b453 100644
--- a/fs/nfs/io.c
+++ b/fs/nfs/io.c
@@ -25,7 +25,7 @@ static void nfs_block_o_direct(struct nfs_inode *nfsi, struct inode *inode)
 
 /**
  * nfs_start_io_read - declare the file is being used for buffered reads
- * @inode - file inode
+ * @inode: file inode
  *
  * Declare that a buffered read operation is about to start, and ensure
  * that we block all direct I/O.
@@ -56,7 +56,7 @@ nfs_start_io_read(struct inode *inode)
 
 /**
  * nfs_end_io_read - declare that the buffered read operation is done
- * @inode - file inode
+ * @inode: file inode
  *
  * Declare that a buffered read operation is done, and release the shared
  * lock on inode->i_rwsem.
@@ -69,7 +69,7 @@ nfs_end_io_read(struct inode *inode)
 
 /**
  * nfs_start_io_write - declare the file is being used for buffered writes
- * @inode - file inode
+ * @inode: file inode
  *
  * Declare that a buffered read operation is about to start, and ensure
  * that we block all direct I/O.
@@ -83,7 +83,7 @@ nfs_start_io_write(struct inode *inode)
 
 /**
  * nfs_end_io_write - declare that the buffered write operation is done
- * @inode - file inode
+ * @inode: file inode
  *
  * Declare that a buffered write operation is done, and release the
  * lock on inode->i_rwsem.
@@ -105,7 +105,7 @@ static void nfs_block_buffered(struct nfs_inode *nfsi, struct inode *inode)
 
 /**
  * nfs_end_io_direct - declare the file is being used for direct i/o
- * @inode - file inode
+ * @inode: file inode
  *
  * Declare that a direct I/O operation is about to start, and ensure
  * that we block all buffered I/O.
@@ -136,7 +136,7 @@ nfs_start_io_direct(struct inode *inode)
 
 /**
  * nfs_end_io_direct - declare that the direct i/o operation is done
- * @inode - file inode
+ * @inode: file inode
  *
  * Declare that a direct I/O operation is done, and release the shared
  * lock on inode->i_rwsem.
diff --git a/fs/nfs/mount_clnt.c b/fs/nfs/mount_clnt.c
index d979ff4fee7e..cb7c10e9721e 100644
--- a/fs/nfs/mount_clnt.c
+++ b/fs/nfs/mount_clnt.c
@@ -163,6 +163,7 @@ int nfs_mount(struct nfs_mount_request *info)
 		.program	= &mnt_program,
 		.version	= info->version,
 		.authflavor	= RPC_AUTH_UNIX,
+		.cred		= current_cred(),
 	};
 	struct rpc_clnt		*mnt_clnt;
 	int			status;
@@ -249,6 +250,7 @@ void nfs_umount(const struct nfs_mount_request *info)
 		.version	= info->version,
 		.authflavor	= RPC_AUTH_UNIX,
 		.flags		= RPC_CLNT_CREATE_NOPING,
+		.cred		= current_cred(),
 	};
 	struct rpc_message msg	= {
 		.rpc_argp	= info->dirpath,
diff --git a/fs/nfs/namespace.c b/fs/nfs/namespace.c
index e5686be67be8..9287eb666322 100644
--- a/fs/nfs/namespace.c
+++ b/fs/nfs/namespace.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/nfs/namespace.c
  *
@@ -221,10 +222,10 @@ static struct vfsmount *nfs_do_clone_mount(struct nfs_server *server,
 
 /**
  * nfs_do_submount - set up mountpoint when crossing a filesystem boundary
- * @dentry - parent directory
- * @fh - filehandle for new root dentry
- * @fattr - attributes for new root inode
- * @authflavor - security flavor to use when performing the mount
+ * @dentry: parent directory
+ * @fh: filehandle for new root dentry
+ * @fattr: attributes for new root inode
+ * @authflavor: security flavor to use when performing the mount
  *
  */
 struct vfsmount *nfs_do_submount(struct dentry *dentry, struct nfs_fh *fh,
diff --git a/fs/nfs/nfs2super.c b/fs/nfs/nfs2super.c
index 0a9782c9171a..467f21ee6a35 100644
--- a/fs/nfs/nfs2super.c
+++ b/fs/nfs/nfs2super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2012 Netapp, Inc. All rights reserved.
  */
diff --git a/fs/nfs/nfs2xdr.c b/fs/nfs/nfs2xdr.c
index 350675e3ed47..572794dab4b1 100644
--- a/fs/nfs/nfs2xdr.c
+++ b/fs/nfs/nfs2xdr.c
@@ -22,6 +22,7 @@
 #include <linux/nfs.h>
 #include <linux/nfs2.h>
 #include <linux/nfs_fs.h>
+#include "nfstrace.h"
 #include "internal.h"
 
 #define NFSDBG_FACILITY		NFSDBG_XDR
@@ -55,42 +56,16 @@
 
 #define NFS_attrstat_sz		(1+NFS_fattr_sz)
 #define NFS_diropres_sz		(1+NFS_fhandle_sz+NFS_fattr_sz)
-#define NFS_readlinkres_sz	(2)
-#define NFS_readres_sz		(1+NFS_fattr_sz+1)
+#define NFS_readlinkres_sz	(2+1)
+#define NFS_readres_sz		(1+NFS_fattr_sz+1+1)
 #define NFS_writeres_sz         (NFS_attrstat_sz)
 #define NFS_stat_sz		(1)
-#define NFS_readdirres_sz	(1)
+#define NFS_readdirres_sz	(1+1)
 #define NFS_statfsres_sz	(1+NFS_info_sz)
 
 static int nfs_stat_to_errno(enum nfs_stat);
 
 /*
- * While encoding arguments, set up the reply buffer in advance to
- * receive reply data directly into the page cache.
- */
-static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages,
-				 unsigned int base, unsigned int len,
-				 unsigned int bufsize)
-{
-	struct rpc_auth	*auth = req->rq_cred->cr_auth;
-	unsigned int replen;
-
-	replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize;
-	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len);
-}
-
-/*
- * Handle decode buffer overflows out-of-line.
- */
-static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
-{
-	dprintk("NFS: %s prematurely hit the end of our receive buffer. "
-		"Remaining buffer length is %tu words.\n",
-		func, xdr->end - xdr->p);
-}
-
-
-/*
  * Encode/decode NFSv2 basic data types
  *
  * Basic NFSv2 data types are defined in section 2.3 of RFC 1094:
@@ -101,6 +76,20 @@ static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
  * or decoded inline.
  */
 
+static struct user_namespace *rpc_userns(const struct rpc_clnt *clnt)
+{
+	if (clnt && clnt->cl_cred)
+		return clnt->cl_cred->user_ns;
+	return &init_user_ns;
+}
+
+static struct user_namespace *rpc_rqst_userns(const struct rpc_rqst *rqstp)
+{
+	if (rqstp->rq_task)
+		return rpc_userns(rqstp->rq_task->tk_client);
+	return &init_user_ns;
+}
+
 /*
  *	typedef opaque	nfsdata<>;
  */
@@ -110,8 +99,8 @@ static int decode_nfsdata(struct xdr_stream *xdr, struct nfs_pgio_res *result)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	count = be32_to_cpup(p);
 	recvd = xdr_read_pages(xdr, count);
 	if (unlikely(count > recvd))
@@ -125,9 +114,6 @@ out_cheating:
 		"count %u > recvd %u\n", count, recvd);
 	count = recvd;
 	goto out;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -157,13 +143,16 @@ static int decode_stat(struct xdr_stream *xdr, enum nfs_stat *status)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
+	if (unlikely(*p != cpu_to_be32(NFS_OK)))
+		goto out_status;
+	*status = 0;
+	return 0;
+out_status:
 	*status = be32_to_cpup(p);
+	trace_nfs_xdr_status((int)*status);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -205,14 +194,11 @@ static int decode_fhandle(struct xdr_stream *xdr, struct nfs_fh *fh)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, NFS2_FHSIZE);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	fh->size = NFS2_FHSIZE;
 	memcpy(fh->data, p, NFS2_FHSIZE);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -276,14 +262,15 @@ static __be32 *xdr_decode_time(__be32 *p, struct timespec *timep)
  *	};
  *
  */
-static int decode_fattr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
+static int decode_fattr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+		struct user_namespace *userns)
 {
 	u32 rdev, type;
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, NFS_fattr_sz << 2);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 
 	fattr->valid |= NFS_ATTR_FATTR_V2;
 
@@ -291,10 +278,10 @@ static int decode_fattr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
 
 	fattr->mode = be32_to_cpup(p++);
 	fattr->nlink = be32_to_cpup(p++);
-	fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++));
+	fattr->uid = make_kuid(userns, be32_to_cpup(p++));
 	if (!uid_valid(fattr->uid))
 		goto out_uid;
-	fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++));
+	fattr->gid = make_kgid(userns, be32_to_cpup(p++));
 	if (!gid_valid(fattr->gid))
 		goto out_gid;
 		
@@ -325,9 +312,6 @@ out_uid:
 out_gid:
 	dprintk("NFS: returned invalid gid\n");
 	return -EINVAL;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -352,7 +336,8 @@ static __be32 *xdr_time_not_set(__be32 *p)
 	return p;
 }
 
-static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr)
+static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr,
+		struct user_namespace *userns)
 {
 	struct timespec ts;
 	__be32 *p;
@@ -364,11 +349,11 @@ static void encode_sattr(struct xdr_stream *xdr, const struct iattr *attr)
 	else
 		*p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
 	if (attr->ia_valid & ATTR_UID)
-		*p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid));
+		*p++ = cpu_to_be32(from_kuid_munged(userns, attr->ia_uid));
 	else
 		*p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
 	if (attr->ia_valid & ATTR_GID)
-		*p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid));
+		*p++ = cpu_to_be32(from_kgid_munged(userns, attr->ia_gid));
 	else
 		*p++ = cpu_to_be32(NFS2_SATTR_NOT_SET);
 	if (attr->ia_valid & ATTR_SIZE)
@@ -416,23 +401,20 @@ static int decode_filename_inline(struct xdr_stream *xdr,
 	u32 count;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	count = be32_to_cpup(p);
 	if (count > NFS3_MAXNAMLEN)
 		goto out_nametoolong;
 	p = xdr_inline_decode(xdr, count);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	*name = (const char *)p;
 	*length = count;
 	return 0;
 out_nametoolong:
 	dprintk("NFS: returned filename too long: %u\n", count);
 	return -ENAMETOOLONG;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -455,8 +437,8 @@ static int decode_path(struct xdr_stream *xdr)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	length = be32_to_cpup(p);
 	if (unlikely(length >= xdr->buf->page_len || length > NFS_MAXPATHLEN))
 		goto out_size;
@@ -472,9 +454,6 @@ out_cheating:
 	dprintk("NFS: server cheating in pathname result: "
 		"length %u > received %u\n", length, recvd);
 	return -EIO;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -488,7 +467,8 @@ out_overflow:
  *	};
  */
 static int decode_attrstat(struct xdr_stream *xdr, struct nfs_fattr *result,
-			   __u32 *op_status)
+			   __u32 *op_status,
+			   struct user_namespace *userns)
 {
 	enum nfs_stat status;
 	int error;
@@ -500,7 +480,7 @@ static int decode_attrstat(struct xdr_stream *xdr, struct nfs_fattr *result,
 		*op_status = status;
 	if (status != NFS_OK)
 		goto out_default;
-	error = decode_fattr(xdr, result);
+	error = decode_fattr(xdr, result, userns);
 out:
 	return error;
 out_default:
@@ -535,19 +515,21 @@ static void encode_diropargs(struct xdr_stream *xdr, const struct nfs_fh *fh,
  *		void;
  *	};
  */
-static int decode_diropok(struct xdr_stream *xdr, struct nfs_diropok *result)
+static int decode_diropok(struct xdr_stream *xdr, struct nfs_diropok *result,
+		struct user_namespace *userns)
 {
 	int error;
 
 	error = decode_fhandle(xdr, result->fh);
 	if (unlikely(error))
 		goto out;
-	error = decode_fattr(xdr, result->fattr);
+	error = decode_fattr(xdr, result->fattr, userns);
 out:
 	return error;
 }
 
-static int decode_diropres(struct xdr_stream *xdr, struct nfs_diropok *result)
+static int decode_diropres(struct xdr_stream *xdr, struct nfs_diropok *result,
+		struct user_namespace *userns)
 {
 	enum nfs_stat status;
 	int error;
@@ -557,7 +539,7 @@ static int decode_diropres(struct xdr_stream *xdr, struct nfs_diropok *result)
 		goto out;
 	if (status != NFS_OK)
 		goto out_default;
-	error = decode_diropok(xdr, result);
+	error = decode_diropok(xdr, result, userns);
 out:
 	return error;
 out_default:
@@ -596,7 +578,7 @@ static void nfs2_xdr_enc_sattrargs(struct rpc_rqst *req,
 	const struct nfs_sattrargs *args = data;
 
 	encode_fhandle(xdr, args->fh);
-	encode_sattr(xdr, args->sattr);
+	encode_sattr(xdr, args->sattr, rpc_rqst_userns(req));
 }
 
 static void nfs2_xdr_enc_diropargs(struct rpc_rqst *req,
@@ -615,8 +597,8 @@ static void nfs2_xdr_enc_readlinkargs(struct rpc_rqst *req,
 	const struct nfs_readlinkargs *args = data;
 
 	encode_fhandle(xdr, args->fh);
-	prepare_reply_buffer(req, args->pages, args->pgbase,
-					args->pglen, NFS_readlinkres_sz);
+	rpc_prepare_reply_pages(req, args->pages, args->pgbase,
+				args->pglen, NFS_readlinkres_sz);
 }
 
 /*
@@ -651,8 +633,8 @@ static void nfs2_xdr_enc_readargs(struct rpc_rqst *req,
 	const struct nfs_pgio_args *args = data;
 
 	encode_readargs(xdr, args);
-	prepare_reply_buffer(req, args->pages, args->pgbase,
-					args->count, NFS_readres_sz);
+	rpc_prepare_reply_pages(req, args->pages, args->pgbase,
+				args->count, NFS_readres_sz);
 	req->rq_rcv_buf.flags |= XDRBUF_READ;
 }
 
@@ -711,7 +693,7 @@ static void nfs2_xdr_enc_createargs(struct rpc_rqst *req,
 	const struct nfs_createargs *args = data;
 
 	encode_diropargs(xdr, args->fh, args->name, args->len);
-	encode_sattr(xdr, args->sattr);
+	encode_sattr(xdr, args->sattr, rpc_rqst_userns(req));
 }
 
 static void nfs2_xdr_enc_removeargs(struct rpc_rqst *req,
@@ -778,7 +760,7 @@ static void nfs2_xdr_enc_symlinkargs(struct rpc_rqst *req,
 
 	encode_diropargs(xdr, args->fromfh, args->fromname, args->fromlen);
 	encode_path(xdr, args->pages, args->pathlen);
-	encode_sattr(xdr, args->sattr);
+	encode_sattr(xdr, args->sattr, rpc_rqst_userns(req));
 }
 
 /*
@@ -809,8 +791,8 @@ static void nfs2_xdr_enc_readdirargs(struct rpc_rqst *req,
 	const struct nfs_readdirargs *args = data;
 
 	encode_readdirargs(xdr, args);
-	prepare_reply_buffer(req, args->pages, 0,
-					args->count, NFS_readdirres_sz);
+	rpc_prepare_reply_pages(req, args->pages, 0,
+				args->count, NFS_readdirres_sz);
 }
 
 /*
@@ -840,13 +822,13 @@ out_default:
 static int nfs2_xdr_dec_attrstat(struct rpc_rqst *req, struct xdr_stream *xdr,
 				 void *result)
 {
-	return decode_attrstat(xdr, result, NULL);
+	return decode_attrstat(xdr, result, NULL, rpc_rqst_userns(req));
 }
 
 static int nfs2_xdr_dec_diropres(struct rpc_rqst *req, struct xdr_stream *xdr,
 				 void *result)
 {
-	return decode_diropres(xdr, result);
+	return decode_diropres(xdr, result, rpc_rqst_userns(req));
 }
 
 /*
@@ -901,7 +883,7 @@ static int nfs2_xdr_dec_readres(struct rpc_rqst *req, struct xdr_stream *xdr,
 	result->op_status = status;
 	if (status != NFS_OK)
 		goto out_default;
-	error = decode_fattr(xdr, result->fattr);
+	error = decode_fattr(xdr, result->fattr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	error = decode_nfsdata(xdr, result);
@@ -918,7 +900,8 @@ static int nfs2_xdr_dec_writeres(struct rpc_rqst *req, struct xdr_stream *xdr,
 
 	/* All NFSv2 writes are "file sync" writes */
 	result->verf->committed = NFS_FILE_SYNC;
-	return decode_attrstat(xdr, result->fattr, &result->op_status);
+	return decode_attrstat(xdr, result->fattr, &result->op_status,
+			rpc_rqst_userns(req));
 }
 
 /**
@@ -951,12 +934,12 @@ int nfs2_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 	int error;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EAGAIN;
 	if (*p++ == xdr_zero) {
 		p = xdr_inline_decode(xdr, 4);
-		if (unlikely(p == NULL))
-			goto out_overflow;
+		if (unlikely(!p))
+			return -EAGAIN;
 		if (*p++ == xdr_zero)
 			return -EAGAIN;
 		entry->eof = 1;
@@ -964,8 +947,8 @@ int nfs2_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 	}
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EAGAIN;
 	entry->ino = be32_to_cpup(p);
 
 	error = decode_filename_inline(xdr, &entry->name, &entry->len);
@@ -978,17 +961,13 @@ int nfs2_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 	 */
 	entry->prev_cookie = entry->cookie;
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EAGAIN;
 	entry->cookie = be32_to_cpup(p);
 
 	entry->d_type = DT_UNKNOWN;
 
 	return 0;
-
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EAGAIN;
 }
 
 /*
@@ -1052,17 +1031,14 @@ static int decode_info(struct xdr_stream *xdr, struct nfs2_fsstat *result)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, NFS_info_sz << 2);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	result->tsize  = be32_to_cpup(p++);
 	result->bsize  = be32_to_cpup(p++);
 	result->blocks = be32_to_cpup(p++);
 	result->bfree  = be32_to_cpup(p++);
 	result->bavail = be32_to_cpup(p);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int nfs2_xdr_dec_statfsres(struct rpc_rqst *req, struct xdr_stream *xdr,
diff --git a/fs/nfs/nfs3acl.c b/fs/nfs/nfs3acl.c
index 9fce18548f7e..c5c3fc6e6c60 100644
--- a/fs/nfs/nfs3acl.c
+++ b/fs/nfs/nfs3acl.c
@@ -222,8 +222,6 @@ static int __nfs3_proc_setacls(struct inode *inode, struct posix_acl *acl,
 	switch (status) {
 		case 0:
 			status = nfs_refresh_inode(inode, fattr);
-			set_cached_acl(inode, ACL_TYPE_ACCESS, acl);
-			set_cached_acl(inode, ACL_TYPE_DEFAULT, dfacl);
 			break;
 		case -EPFNOSUPPORT:
 		case -EPROTONOSUPPORT:
diff --git a/fs/nfs/nfs3client.c b/fs/nfs/nfs3client.c
index 7879f2a0fcfd..fb0c425b5d45 100644
--- a/fs/nfs/nfs3client.c
+++ b/fs/nfs/nfs3client.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <linux/nfs_fs.h>
 #include <linux/nfs_mount.h>
 #include <linux/sunrpc/addr.h>
@@ -91,6 +92,7 @@ struct nfs_client *nfs3_set_ds_client(struct nfs_server *mds_srv,
 		.proto = ds_proto,
 		.net = mds_clp->cl_net,
 		.timeparms = &ds_timeout,
+		.cred = mds_srv->cred,
 	};
 	struct nfs_client *clp;
 	char buf[INET6_ADDRSTRLEN + 1];
diff --git a/fs/nfs/nfs3super.c b/fs/nfs/nfs3super.c
index 5c4394e4656b..7c5809431e61 100644
--- a/fs/nfs/nfs3super.c
+++ b/fs/nfs/nfs3super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2012 Netapp, Inc. All rights reserved.
  */
diff --git a/fs/nfs/nfs3xdr.c b/fs/nfs/nfs3xdr.c
index 78df4eb60f85..abbbdde97e31 100644
--- a/fs/nfs/nfs3xdr.c
+++ b/fs/nfs/nfs3xdr.c
@@ -21,6 +21,7 @@
 #include <linux/nfs3.h>
 #include <linux/nfs_fs.h>
 #include <linux/nfsacl.h>
+#include "nfstrace.h"
 #include "internal.h"
 
 #define NFSDBG_FACILITY		NFSDBG_XDR
@@ -68,13 +69,13 @@
 #define NFS3_removeres_sz	(NFS3_setattrres_sz)
 #define NFS3_lookupres_sz	(1+NFS3_fh_sz+(2 * NFS3_post_op_attr_sz))
 #define NFS3_accessres_sz	(1+NFS3_post_op_attr_sz+1)
-#define NFS3_readlinkres_sz	(1+NFS3_post_op_attr_sz+1)
-#define NFS3_readres_sz		(1+NFS3_post_op_attr_sz+3)
+#define NFS3_readlinkres_sz	(1+NFS3_post_op_attr_sz+1+1)
+#define NFS3_readres_sz		(1+NFS3_post_op_attr_sz+3+1)
 #define NFS3_writeres_sz	(1+NFS3_wcc_data_sz+4)
 #define NFS3_createres_sz	(1+NFS3_fh_sz+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
 #define NFS3_renameres_sz	(1+(2 * NFS3_wcc_data_sz))
 #define NFS3_linkres_sz		(1+NFS3_post_op_attr_sz+NFS3_wcc_data_sz)
-#define NFS3_readdirres_sz	(1+NFS3_post_op_attr_sz+2)
+#define NFS3_readdirres_sz	(1+NFS3_post_op_attr_sz+2+1)
 #define NFS3_fsstatres_sz	(1+NFS3_post_op_attr_sz+13)
 #define NFS3_fsinfores_sz	(1+NFS3_post_op_attr_sz+12)
 #define NFS3_pathconfres_sz	(1+NFS3_post_op_attr_sz+6)
@@ -84,7 +85,7 @@
 #define ACL3_setaclargs_sz	(NFS3_fh_sz+1+ \
 				XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
 #define ACL3_getaclres_sz	(1+NFS3_post_op_attr_sz+1+ \
-				XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE))
+				XDR_QUADLEN(NFS_ACL_INLINE_BUFSIZE)+1)
 #define ACL3_setaclres_sz	(1+NFS3_post_op_attr_sz)
 
 static int nfs3_stat_to_errno(enum nfs_stat);
@@ -103,32 +104,20 @@ static const umode_t nfs_type2fmt[] = {
 	[NF3FIFO] = S_IFIFO,
 };
 
-/*
- * While encoding arguments, set up the reply buffer in advance to
- * receive reply data directly into the page cache.
- */
-static void prepare_reply_buffer(struct rpc_rqst *req, struct page **pages,
-				 unsigned int base, unsigned int len,
-				 unsigned int bufsize)
+static struct user_namespace *rpc_userns(const struct rpc_clnt *clnt)
 {
-	struct rpc_auth	*auth = req->rq_cred->cr_auth;
-	unsigned int replen;
-
-	replen = RPC_REPHDRSIZE + auth->au_rslack + bufsize;
-	xdr_inline_pages(&req->rq_rcv_buf, replen << 2, pages, base, len);
+	if (clnt && clnt->cl_cred)
+		return clnt->cl_cred->user_ns;
+	return &init_user_ns;
 }
 
-/*
- * Handle decode buffer overflows out-of-line.
- */
-static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
+static struct user_namespace *rpc_rqst_userns(const struct rpc_rqst *rqstp)
 {
-	dprintk("NFS: %s prematurely hit the end of our receive buffer. "
-		"Remaining buffer length is %tu words.\n",
-		func, xdr->end - xdr->p);
+	if (rqstp->rq_task)
+		return rpc_userns(rqstp->rq_task->tk_client);
+	return &init_user_ns;
 }
 
-
 /*
  * Encode/decode NFSv3 basic data types
  *
@@ -151,13 +140,10 @@ static int decode_uint32(struct xdr_stream *xdr, u32 *value)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	*value = be32_to_cpup(p);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_uint64(struct xdr_stream *xdr, u64 *value)
@@ -165,13 +151,10 @@ static int decode_uint64(struct xdr_stream *xdr, u64 *value)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 8);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	xdr_decode_hyper(p, value);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -211,14 +194,14 @@ static int decode_inline_filename3(struct xdr_stream *xdr,
 	u32 count;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	count = be32_to_cpup(p);
 	if (count > NFS3_MAXNAMLEN)
 		goto out_nametoolong;
 	p = xdr_inline_decode(xdr, count);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	*name = (const char *)p;
 	*length = count;
 	return 0;
@@ -226,9 +209,6 @@ static int decode_inline_filename3(struct xdr_stream *xdr,
 out_nametoolong:
 	dprintk("NFS: returned filename too long: %u\n", count);
 	return -ENAMETOOLONG;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -249,8 +229,8 @@ static int decode_nfspath3(struct xdr_stream *xdr)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	count = be32_to_cpup(p);
 	if (unlikely(count >= xdr->buf->page_len || count > NFS3_MAXPATHLEN))
 		goto out_nametoolong;
@@ -267,9 +247,6 @@ out_cheating:
 	dprintk("NFS: server cheating in pathname result: "
 		"count %u > recvd %u\n", count, recvd);
 	return -EIO;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -303,13 +280,10 @@ static int decode_cookieverf3(struct xdr_stream *xdr, __be32 *verifier)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, NFS3_COOKIEVERFSIZE);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	memcpy(verifier, p, NFS3_COOKIEVERFSIZE);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -330,13 +304,10 @@ static int decode_writeverf3(struct xdr_stream *xdr, struct nfs_write_verifier *
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, NFS3_WRITEVERFSIZE);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	memcpy(verifier->data, p, NFS3_WRITEVERFSIZE);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -364,13 +335,16 @@ static int decode_nfsstat3(struct xdr_stream *xdr, enum nfs_stat *status)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
+	if (unlikely(*p != cpu_to_be32(NFS3_OK)))
+		goto out_status;
+	*status = 0;
+	return 0;
+out_status:
 	*status = be32_to_cpup(p);
+	trace_nfs_xdr_status((int)*status);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -453,23 +427,20 @@ static int decode_nfs_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	length = be32_to_cpup(p++);
 	if (unlikely(length > NFS3_FHSIZE))
 		goto out_toobig;
 	p = xdr_inline_decode(xdr, length);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	fh->size = length;
 	memcpy(fh->data, p, length);
 	return 0;
 out_toobig:
 	dprintk("NFS: file handle size (%u) too big\n", length);
 	return -E2BIG;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static void zero_nfs_fh3(struct nfs_fh *fh)
@@ -559,7 +530,8 @@ static __be32 *xdr_decode_nfstime3(__be32 *p, struct timespec *timep)
  *		set_mtime	mtime;
  *	};
  */
-static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
+static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr,
+		struct user_namespace *userns)
 {
 	struct timespec ts;
 	u32 nbytes;
@@ -594,13 +566,13 @@ static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
 
 	if (attr->ia_valid & ATTR_UID) {
 		*p++ = xdr_one;
-		*p++ = cpu_to_be32(from_kuid(&init_user_ns, attr->ia_uid));
+		*p++ = cpu_to_be32(from_kuid_munged(userns, attr->ia_uid));
 	} else
 		*p++ = xdr_zero;
 
 	if (attr->ia_valid & ATTR_GID) {
 		*p++ = xdr_one;
-		*p++ = cpu_to_be32(from_kgid(&init_user_ns, attr->ia_gid));
+		*p++ = cpu_to_be32(from_kgid_munged(userns, attr->ia_gid));
 	} else
 		*p++ = xdr_zero;
 
@@ -649,23 +621,24 @@ static void encode_sattr3(struct xdr_stream *xdr, const struct iattr *attr)
  *		nfstime3	ctime;
  *	};
  */
-static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr)
+static int decode_fattr3(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+		struct user_namespace *userns)
 {
 	umode_t fmode;
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, NFS3_fattr_sz << 2);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 
 	p = xdr_decode_ftype3(p, &fmode);
 
 	fattr->mode = (be32_to_cpup(p++) & ~S_IFMT) | fmode;
 	fattr->nlink = be32_to_cpup(p++);
-	fattr->uid = make_kuid(&init_user_ns, be32_to_cpup(p++));
+	fattr->uid = make_kuid(userns, be32_to_cpup(p++));
 	if (!uid_valid(fattr->uid))
 		goto out_uid;
-	fattr->gid = make_kgid(&init_user_ns, be32_to_cpup(p++));
+	fattr->gid = make_kgid(userns, be32_to_cpup(p++));
 	if (!gid_valid(fattr->gid))
 		goto out_gid;
 
@@ -690,9 +663,6 @@ out_uid:
 out_gid:
 	dprintk("NFS: returned invalid gid\n");
 	return -EINVAL;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -705,19 +675,17 @@ out_overflow:
  *		void;
  *	};
  */
-static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
+static int decode_post_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+		struct user_namespace *userns)
 {
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	if (*p != xdr_zero)
-		return decode_fattr3(xdr, fattr);
+		return decode_fattr3(xdr, fattr, userns);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -733,8 +701,8 @@ static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, NFS3_wcc_attr_sz << 2);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 
 	fattr->valid |= NFS_ATTR_FATTR_PRESIZE
 		| NFS_ATTR_FATTR_PRECHANGE
@@ -747,9 +715,6 @@ static int decode_wcc_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
 	fattr->pre_change_attr = nfs_timespec_to_change_attr(&fattr->pre_ctime);
 
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -773,24 +738,22 @@ static int decode_pre_op_attr(struct xdr_stream *xdr, struct nfs_fattr *fattr)
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	if (*p != xdr_zero)
 		return decode_wcc_attr(xdr, fattr);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
-static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr)
+static int decode_wcc_data(struct xdr_stream *xdr, struct nfs_fattr *fattr,
+		struct user_namespace *userns)
 {
 	int error;
 
 	error = decode_pre_op_attr(xdr, fattr);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, fattr);
+	error = decode_post_op_attr(xdr, fattr, userns);
 out:
 	return error;
 }
@@ -808,15 +771,12 @@ out:
 static int decode_post_op_fh3(struct xdr_stream *xdr, struct nfs_fh *fh)
 {
 	__be32 *p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	if (*p != xdr_zero)
 		return decode_nfs_fh3(xdr, fh);
 	zero_nfs_fh3(fh);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -895,7 +855,7 @@ static void nfs3_xdr_enc_setattr3args(struct rpc_rqst *req,
 {
 	const struct nfs3_sattrargs *args = data;
 	encode_nfs_fh3(xdr, args->fh);
-	encode_sattr3(xdr, args->sattr);
+	encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req));
 	encode_sattrguard3(xdr, args);
 }
 
@@ -953,8 +913,8 @@ static void nfs3_xdr_enc_readlink3args(struct rpc_rqst *req,
 	const struct nfs3_readlinkargs *args = data;
 
 	encode_nfs_fh3(xdr, args->fh);
-	prepare_reply_buffer(req, args->pages, args->pgbase,
-					args->pglen, NFS3_readlinkres_sz);
+	rpc_prepare_reply_pages(req, args->pages, args->pgbase,
+				args->pglen, NFS3_readlinkres_sz);
 }
 
 /*
@@ -986,8 +946,8 @@ static void nfs3_xdr_enc_read3args(struct rpc_rqst *req,
 	unsigned int replen = args->replen ? args->replen : NFS3_readres_sz;
 
 	encode_read3args(xdr, args);
-	prepare_reply_buffer(req, args->pages, args->pgbase,
-					args->count, replen);
+	rpc_prepare_reply_pages(req, args->pages, args->pgbase,
+				args->count, replen);
 	req->rq_rcv_buf.flags |= XDRBUF_READ;
 }
 
@@ -1056,13 +1016,14 @@ static void nfs3_xdr_enc_write3args(struct rpc_rqst *req,
  *	};
  */
 static void encode_createhow3(struct xdr_stream *xdr,
-			      const struct nfs3_createargs *args)
+			      const struct nfs3_createargs *args,
+			      struct user_namespace *userns)
 {
 	encode_uint32(xdr, args->createmode);
 	switch (args->createmode) {
 	case NFS3_CREATE_UNCHECKED:
 	case NFS3_CREATE_GUARDED:
-		encode_sattr3(xdr, args->sattr);
+		encode_sattr3(xdr, args->sattr, userns);
 		break;
 	case NFS3_CREATE_EXCLUSIVE:
 		encode_createverf3(xdr, args->verifier);
@@ -1079,7 +1040,7 @@ static void nfs3_xdr_enc_create3args(struct rpc_rqst *req,
 	const struct nfs3_createargs *args = data;
 
 	encode_diropargs3(xdr, args->fh, args->name, args->len);
-	encode_createhow3(xdr, args);
+	encode_createhow3(xdr, args, rpc_rqst_userns(req));
 }
 
 /*
@@ -1097,7 +1058,7 @@ static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
 	const struct nfs3_mkdirargs *args = data;
 
 	encode_diropargs3(xdr, args->fh, args->name, args->len);
-	encode_sattr3(xdr, args->sattr);
+	encode_sattr3(xdr, args->sattr, rpc_rqst_userns(req));
 }
 
 /*
@@ -1114,11 +1075,12 @@ static void nfs3_xdr_enc_mkdir3args(struct rpc_rqst *req,
  *	};
  */
 static void encode_symlinkdata3(struct xdr_stream *xdr,
-				const void *data)
+				const void *data,
+				struct user_namespace *userns)
 {
 	const struct nfs3_symlinkargs *args = data;
 
-	encode_sattr3(xdr, args->sattr);
+	encode_sattr3(xdr, args->sattr, userns);
 	encode_nfspath3(xdr, args->pages, args->pathlen);
 }
 
@@ -1129,7 +1091,7 @@ static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
 	const struct nfs3_symlinkargs *args = data;
 
 	encode_diropargs3(xdr, args->fromfh, args->fromname, args->fromlen);
-	encode_symlinkdata3(xdr, args);
+	encode_symlinkdata3(xdr, args, rpc_rqst_userns(req));
 	xdr->buf->flags |= XDRBUF_WRITE;
 }
 
@@ -1158,24 +1120,26 @@ static void nfs3_xdr_enc_symlink3args(struct rpc_rqst *req,
  *	};
  */
 static void encode_devicedata3(struct xdr_stream *xdr,
-			       const struct nfs3_mknodargs *args)
+			       const struct nfs3_mknodargs *args,
+			       struct user_namespace *userns)
 {
-	encode_sattr3(xdr, args->sattr);
+	encode_sattr3(xdr, args->sattr, userns);
 	encode_specdata3(xdr, args->rdev);
 }
 
 static void encode_mknoddata3(struct xdr_stream *xdr,
-			      const struct nfs3_mknodargs *args)
+			      const struct nfs3_mknodargs *args,
+			      struct user_namespace *userns)
 {
 	encode_ftype3(xdr, args->type);
 	switch (args->type) {
 	case NF3CHR:
 	case NF3BLK:
-		encode_devicedata3(xdr, args);
+		encode_devicedata3(xdr, args, userns);
 		break;
 	case NF3SOCK:
 	case NF3FIFO:
-		encode_sattr3(xdr, args->sattr);
+		encode_sattr3(xdr, args->sattr, userns);
 		break;
 	case NF3REG:
 	case NF3DIR:
@@ -1192,7 +1156,7 @@ static void nfs3_xdr_enc_mknod3args(struct rpc_rqst *req,
 	const struct nfs3_mknodargs *args = data;
 
 	encode_diropargs3(xdr, args->fh, args->name, args->len);
-	encode_mknoddata3(xdr, args);
+	encode_mknoddata3(xdr, args, rpc_rqst_userns(req));
 }
 
 /*
@@ -1279,7 +1243,7 @@ static void nfs3_xdr_enc_readdir3args(struct rpc_rqst *req,
 	const struct nfs3_readdirargs *args = data;
 
 	encode_readdir3args(xdr, args);
-	prepare_reply_buffer(req, args->pages, 0,
+	rpc_prepare_reply_pages(req, args->pages, 0,
 				args->count, NFS3_readdirres_sz);
 }
 
@@ -1321,7 +1285,7 @@ static void nfs3_xdr_enc_readdirplus3args(struct rpc_rqst *req,
 	const struct nfs3_readdirargs *args = data;
 
 	encode_readdirplus3args(xdr, args);
-	prepare_reply_buffer(req, args->pages, 0,
+	rpc_prepare_reply_pages(req, args->pages, 0,
 				args->count, NFS3_readdirres_sz);
 }
 
@@ -1366,7 +1330,7 @@ static void nfs3_xdr_enc_getacl3args(struct rpc_rqst *req,
 	encode_nfs_fh3(xdr, args->fh);
 	encode_uint32(xdr, args->mask);
 	if (args->mask & (NFS_ACL | NFS_DFACL)) {
-		prepare_reply_buffer(req, args->pages, 0,
+		rpc_prepare_reply_pages(req, args->pages, 0,
 					NFSACL_MAXPAGES << PAGE_SHIFT,
 					ACL3_getaclres_sz);
 		req->rq_rcv_buf.flags |= XDRBUF_SPARSE_PAGES;
@@ -1437,7 +1401,7 @@ static int nfs3_xdr_dec_getattr3res(struct rpc_rqst *req,
 		goto out;
 	if (status != NFS3_OK)
 		goto out_default;
-	error = decode_fattr3(xdr, result);
+	error = decode_fattr3(xdr, result, rpc_rqst_userns(req));
 out:
 	return error;
 out_default:
@@ -1472,7 +1436,7 @@ static int nfs3_xdr_dec_setattr3res(struct rpc_rqst *req,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_wcc_data(xdr, result);
+	error = decode_wcc_data(xdr, result, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	if (status != NFS3_OK)
@@ -1507,6 +1471,7 @@ static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
 				   struct xdr_stream *xdr,
 				   void *data)
 {
+	struct user_namespace *userns = rpc_rqst_userns(req);
 	struct nfs3_diropres *result = data;
 	enum nfs_stat status;
 	int error;
@@ -1519,14 +1484,14 @@ static int nfs3_xdr_dec_lookup3res(struct rpc_rqst *req,
 	error = decode_nfs_fh3(xdr, result->fh);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result->fattr);
+	error = decode_post_op_attr(xdr, result->fattr, userns);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result->dir_attr);
+	error = decode_post_op_attr(xdr, result->dir_attr, userns);
 out:
 	return error;
 out_default:
-	error = decode_post_op_attr(xdr, result->dir_attr);
+	error = decode_post_op_attr(xdr, result->dir_attr, userns);
 	if (unlikely(error))
 		goto out;
 	return nfs3_stat_to_errno(status);
@@ -1562,7 +1527,7 @@ static int nfs3_xdr_dec_access3res(struct rpc_rqst *req,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result->fattr);
+	error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	if (status != NFS3_OK)
@@ -1603,7 +1568,7 @@ static int nfs3_xdr_dec_readlink3res(struct rpc_rqst *req,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result);
+	error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	if (status != NFS3_OK)
@@ -1643,8 +1608,8 @@ static int decode_read3resok(struct xdr_stream *xdr,
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4 + 4 + 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	count = be32_to_cpup(p++);
 	eof = be32_to_cpup(p++);
 	ocount = be32_to_cpup(p++);
@@ -1667,9 +1632,6 @@ out_cheating:
 	count = recvd;
 	eof = 0;
 	goto out;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr,
@@ -1684,13 +1646,13 @@ static int nfs3_xdr_dec_read3res(struct rpc_rqst *req, struct xdr_stream *xdr,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result->fattr);
+	error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	result->op_status = status;
 	if (status != NFS3_OK)
 		goto out_status;
-	result->replen = 3 + ((xdr_stream_pos(xdr) - pos) >> 2);
+	result->replen = 4 + ((xdr_stream_pos(xdr) - pos) >> 2);
 	error = decode_read3resok(xdr, result);
 out:
 	return error;
@@ -1731,22 +1693,18 @@ static int decode_write3resok(struct xdr_stream *xdr,
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4 + 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	result->count = be32_to_cpup(p++);
 	result->verf->committed = be32_to_cpup(p++);
 	if (unlikely(result->verf->committed > NFS_FILE_SYNC))
 		goto out_badvalue;
 	if (decode_writeverf3(xdr, &result->verf->verifier))
-		goto out_eio;
+		return -EIO;
 	return result->count;
 out_badvalue:
 	dprintk("NFS: bad stable_how value: %u\n", result->verf->committed);
 	return -EIO;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-out_eio:
-	return -EIO;
 }
 
 static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
@@ -1759,7 +1717,7 @@ static int nfs3_xdr_dec_write3res(struct rpc_rqst *req, struct xdr_stream *xdr,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_wcc_data(xdr, result->fattr);
+	error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	result->op_status = status;
@@ -1793,14 +1751,15 @@ out_status:
  *	};
  */
 static int decode_create3resok(struct xdr_stream *xdr,
-			       struct nfs3_diropres *result)
+			       struct nfs3_diropres *result,
+			       struct user_namespace *userns)
 {
 	int error;
 
 	error = decode_post_op_fh3(xdr, result->fh);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result->fattr);
+	error = decode_post_op_attr(xdr, result->fattr, userns);
 	if (unlikely(error))
 		goto out;
 	/* The server isn't required to return a file handle.
@@ -1809,7 +1768,7 @@ static int decode_create3resok(struct xdr_stream *xdr,
 	 * values for the new object. */
 	if (result->fh->size == 0)
 		result->fattr->valid = 0;
-	error = decode_wcc_data(xdr, result->dir_attr);
+	error = decode_wcc_data(xdr, result->dir_attr, userns);
 out:
 	return error;
 }
@@ -1818,6 +1777,7 @@ static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
 				   struct xdr_stream *xdr,
 				   void *data)
 {
+	struct user_namespace *userns = rpc_rqst_userns(req);
 	struct nfs3_diropres *result = data;
 	enum nfs_stat status;
 	int error;
@@ -1827,11 +1787,11 @@ static int nfs3_xdr_dec_create3res(struct rpc_rqst *req,
 		goto out;
 	if (status != NFS3_OK)
 		goto out_default;
-	error = decode_create3resok(xdr, result);
+	error = decode_create3resok(xdr, result, userns);
 out:
 	return error;
 out_default:
-	error = decode_wcc_data(xdr, result->dir_attr);
+	error = decode_wcc_data(xdr, result->dir_attr, userns);
 	if (unlikely(error))
 		goto out;
 	return nfs3_stat_to_errno(status);
@@ -1866,7 +1826,7 @@ static int nfs3_xdr_dec_remove3res(struct rpc_rqst *req,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_wcc_data(xdr, result->dir_attr);
+	error = decode_wcc_data(xdr, result->dir_attr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	if (status != NFS3_OK)
@@ -1901,6 +1861,7 @@ static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
 				   struct xdr_stream *xdr,
 				   void *data)
 {
+	struct user_namespace *userns = rpc_rqst_userns(req);
 	struct nfs_renameres *result = data;
 	enum nfs_stat status;
 	int error;
@@ -1908,10 +1869,10 @@ static int nfs3_xdr_dec_rename3res(struct rpc_rqst *req,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_wcc_data(xdr, result->old_fattr);
+	error = decode_wcc_data(xdr, result->old_fattr, userns);
 	if (unlikely(error))
 		goto out;
-	error = decode_wcc_data(xdr, result->new_fattr);
+	error = decode_wcc_data(xdr, result->new_fattr, userns);
 	if (unlikely(error))
 		goto out;
 	if (status != NFS3_OK)
@@ -1945,6 +1906,7 @@ out_status:
 static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
 				 void *data)
 {
+	struct user_namespace *userns = rpc_rqst_userns(req);
 	struct nfs3_linkres *result = data;
 	enum nfs_stat status;
 	int error;
@@ -1952,10 +1914,10 @@ static int nfs3_xdr_dec_link3res(struct rpc_rqst *req, struct xdr_stream *xdr,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result->fattr);
+	error = decode_post_op_attr(xdr, result->fattr, userns);
 	if (unlikely(error))
 		goto out;
-	error = decode_wcc_data(xdr, result->dir_attr);
+	error = decode_wcc_data(xdr, result->dir_attr, userns);
 	if (unlikely(error))
 		goto out;
 	if (status != NFS3_OK)
@@ -2004,18 +1966,19 @@ out_status:
 int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 		       bool plus)
 {
+	struct user_namespace *userns = rpc_userns(entry->server->client);
 	struct nfs_entry old = *entry;
 	__be32 *p;
 	int error;
 	u64 new_cookie;
 
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EAGAIN;
 	if (*p == xdr_zero) {
 		p = xdr_inline_decode(xdr, 4);
-		if (unlikely(p == NULL))
-			goto out_overflow;
+		if (unlikely(!p))
+			return -EAGAIN;
 		if (*p == xdr_zero)
 			return -EAGAIN;
 		entry->eof = 1;
@@ -2038,7 +2001,7 @@ int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 
 	if (plus) {
 		entry->fattr->valid = 0;
-		error = decode_post_op_attr(xdr, entry->fattr);
+		error = decode_post_op_attr(xdr, entry->fattr, userns);
 		if (unlikely(error))
 			return error;
 		if (entry->fattr->valid & NFS_ATTR_FATTR_V3)
@@ -2051,8 +2014,8 @@ int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 
 		/* In fact, a post_op_fh3: */
 		p = xdr_inline_decode(xdr, 4);
-		if (unlikely(p == NULL))
-			goto out_overflow;
+		if (unlikely(!p))
+			return -EAGAIN;
 		if (*p != xdr_zero) {
 			error = decode_nfs_fh3(xdr, entry->fh);
 			if (unlikely(error)) {
@@ -2069,9 +2032,6 @@ int nfs3_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 
 	return 0;
 
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EAGAIN;
 out_truncated:
 	dprintk("NFS: directory entry contains invalid file handle\n");
 	*entry = old;
@@ -2113,11 +2073,12 @@ static int decode_dirlist3(struct xdr_stream *xdr)
 }
 
 static int decode_readdir3resok(struct xdr_stream *xdr,
-				struct nfs3_readdirres *result)
+				struct nfs3_readdirres *result,
+				struct user_namespace *userns)
 {
 	int error;
 
-	error = decode_post_op_attr(xdr, result->dir_attr);
+	error = decode_post_op_attr(xdr, result->dir_attr, userns);
 	if (unlikely(error))
 		goto out;
 	/* XXX: do we need to check if result->verf != NULL ? */
@@ -2142,11 +2103,11 @@ static int nfs3_xdr_dec_readdir3res(struct rpc_rqst *req,
 		goto out;
 	if (status != NFS3_OK)
 		goto out_default;
-	error = decode_readdir3resok(xdr, result);
+	error = decode_readdir3resok(xdr, result, rpc_rqst_userns(req));
 out:
 	return error;
 out_default:
-	error = decode_post_op_attr(xdr, result->dir_attr);
+	error = decode_post_op_attr(xdr, result->dir_attr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	return nfs3_stat_to_errno(status);
@@ -2183,8 +2144,8 @@ static int decode_fsstat3resok(struct xdr_stream *xdr,
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 8 * 6 + 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	p = xdr_decode_size3(p, &result->tbytes);
 	p = xdr_decode_size3(p, &result->fbytes);
 	p = xdr_decode_size3(p, &result->abytes);
@@ -2193,9 +2154,6 @@ static int decode_fsstat3resok(struct xdr_stream *xdr,
 	xdr_decode_size3(p, &result->afiles);
 	/* ignore invarsec */
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req,
@@ -2209,7 +2167,7 @@ static int nfs3_xdr_dec_fsstat3res(struct rpc_rqst *req,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result->fattr);
+	error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	if (status != NFS3_OK)
@@ -2255,8 +2213,8 @@ static int decode_fsinfo3resok(struct xdr_stream *xdr,
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4 * 7 + 8 + 8 + 4);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	result->rtmax  = be32_to_cpup(p++);
 	result->rtpref = be32_to_cpup(p++);
 	result->rtmult = be32_to_cpup(p++);
@@ -2270,9 +2228,6 @@ static int decode_fsinfo3resok(struct xdr_stream *xdr,
 	/* ignore properties */
 	result->lease_time = 0;
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req,
@@ -2286,7 +2241,7 @@ static int nfs3_xdr_dec_fsinfo3res(struct rpc_rqst *req,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result->fattr);
+	error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	if (status != NFS3_OK)
@@ -2328,15 +2283,12 @@ static int decode_pathconf3resok(struct xdr_stream *xdr,
 	__be32 *p;
 
 	p = xdr_inline_decode(xdr, 4 * 6);
-	if (unlikely(p == NULL))
-		goto out_overflow;
+	if (unlikely(!p))
+		return -EIO;
 	result->max_link = be32_to_cpup(p++);
 	result->max_namelen = be32_to_cpup(p);
 	/* ignore remaining fields */
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req,
@@ -2350,7 +2302,7 @@ static int nfs3_xdr_dec_pathconf3res(struct rpc_rqst *req,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_post_op_attr(xdr, result->fattr);
+	error = decode_post_op_attr(xdr, result->fattr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	if (status != NFS3_OK)
@@ -2392,7 +2344,7 @@ static int nfs3_xdr_dec_commit3res(struct rpc_rqst *req,
 	error = decode_nfsstat3(xdr, &status);
 	if (unlikely(error))
 		goto out;
-	error = decode_wcc_data(xdr, result->fattr);
+	error = decode_wcc_data(xdr, result->fattr, rpc_rqst_userns(req));
 	if (unlikely(error))
 		goto out;
 	result->op_status = status;
@@ -2408,14 +2360,15 @@ out_status:
 #ifdef CONFIG_NFS_V3_ACL
 
 static inline int decode_getacl3resok(struct xdr_stream *xdr,
-				      struct nfs3_getaclres *result)
+				      struct nfs3_getaclres *result,
+				      struct user_namespace *userns)
 {
 	struct posix_acl **acl;
 	unsigned int *aclcnt;
 	size_t hdrlen;
 	int error;
 
-	error = decode_post_op_attr(xdr, result->fattr);
+	error = decode_post_op_attr(xdr, result->fattr, userns);
 	if (unlikely(error))
 		goto out;
 	error = decode_uint32(xdr, &result->mask);
@@ -2463,7 +2416,7 @@ static int nfs3_xdr_dec_getacl3res(struct rpc_rqst *req,
 		goto out;
 	if (status != NFS3_OK)
 		goto out_default;
-	error = decode_getacl3resok(xdr, result);
+	error = decode_getacl3resok(xdr, result, rpc_rqst_userns(req));
 out:
 	return error;
 out_default:
@@ -2482,7 +2435,7 @@ static int nfs3_xdr_dec_setacl3res(struct rpc_rqst *req,
 		goto out;
 	if (status != NFS3_OK)
 		goto out_default;
-	error = decode_post_op_attr(xdr, result);
+	error = decode_post_op_attr(xdr, result, rpc_rqst_userns(req));
 out:
 	return error;
 out_default:
diff --git a/fs/nfs/nfs42.h b/fs/nfs/nfs42.h
index 19ec38f85ce0..901cca7542f9 100644
--- a/fs/nfs/nfs42.h
+++ b/fs/nfs/nfs42.h
@@ -20,5 +20,8 @@ loff_t nfs42_proc_llseek(struct file *, loff_t, int);
 int nfs42_proc_layoutstats_generic(struct nfs_server *,
 				   struct nfs42_layoutstat_data *);
 int nfs42_proc_clone(struct file *, struct file *, loff_t, loff_t, loff_t);
+int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
+			   const struct nfs42_layout_error *errors,
+			   size_t n);
 
 #endif /* __LINUX_FS_NFS_NFS4_2_H */
diff --git a/fs/nfs/nfs42proc.c b/fs/nfs/nfs42proc.c
index fed06fd9998d..5196bfa7894d 100644
--- a/fs/nfs/nfs42proc.c
+++ b/fs/nfs/nfs42proc.c
@@ -329,9 +329,6 @@ ssize_t nfs42_proc_copy(struct file *src, loff_t pos_src,
 	};
 	ssize_t err, err2;
 
-	if (!nfs_server_capable(file_inode(dst), NFS_CAP_COPY))
-		return -EOPNOTSUPP;
-
 	src_lock = nfs_get_lock_context(nfs_file_open_context(src));
 	if (IS_ERR(src_lock))
 		return PTR_ERR(src_lock);
@@ -672,6 +669,170 @@ int nfs42_proc_layoutstats_generic(struct nfs_server *server,
 	return 0;
 }
 
+static struct nfs42_layouterror_data *
+nfs42_alloc_layouterror_data(struct pnfs_layout_segment *lseg, gfp_t gfp_flags)
+{
+	struct nfs42_layouterror_data *data;
+	struct inode *inode = lseg->pls_layout->plh_inode;
+
+	data = kzalloc(sizeof(*data), gfp_flags);
+	if (data) {
+		data->args.inode = data->inode = nfs_igrab_and_active(inode);
+		if (data->inode) {
+			data->lseg = pnfs_get_lseg(lseg);
+			if (data->lseg)
+				return data;
+			nfs_iput_and_deactive(data->inode);
+		}
+		kfree(data);
+	}
+	return NULL;
+}
+
+static void
+nfs42_free_layouterror_data(struct nfs42_layouterror_data *data)
+{
+	pnfs_put_lseg(data->lseg);
+	nfs_iput_and_deactive(data->inode);
+	kfree(data);
+}
+
+static void
+nfs42_layouterror_prepare(struct rpc_task *task, void *calldata)
+{
+	struct nfs42_layouterror_data *data = calldata;
+	struct inode *inode = data->inode;
+	struct nfs_server *server = NFS_SERVER(inode);
+	struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
+	unsigned i;
+
+	spin_lock(&inode->i_lock);
+	if (!pnfs_layout_is_valid(lo)) {
+		spin_unlock(&inode->i_lock);
+		rpc_exit(task, 0);
+		return;
+	}
+	for (i = 0; i < data->args.num_errors; i++)
+		nfs4_stateid_copy(&data->args.errors[i].stateid,
+				&lo->plh_stateid);
+	spin_unlock(&inode->i_lock);
+	nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
+			    &data->res.seq_res, task);
+}
+
+static void
+nfs42_layouterror_done(struct rpc_task *task, void *calldata)
+{
+	struct nfs42_layouterror_data *data = calldata;
+	struct inode *inode = data->inode;
+	struct pnfs_layout_hdr *lo = data->lseg->pls_layout;
+
+	if (!nfs4_sequence_done(task, &data->res.seq_res))
+		return;
+
+	switch (task->tk_status) {
+	case 0:
+		break;
+	case -NFS4ERR_BADHANDLE:
+	case -ESTALE:
+		pnfs_destroy_layout(NFS_I(inode));
+		break;
+	case -NFS4ERR_EXPIRED:
+	case -NFS4ERR_ADMIN_REVOKED:
+	case -NFS4ERR_DELEG_REVOKED:
+	case -NFS4ERR_STALE_STATEID:
+	case -NFS4ERR_BAD_STATEID:
+		spin_lock(&inode->i_lock);
+		if (pnfs_layout_is_valid(lo) &&
+		    nfs4_stateid_match(&data->args.errors[0].stateid,
+					     &lo->plh_stateid)) {
+			LIST_HEAD(head);
+
+			/*
+			 * Mark the bad layout state as invalid, then retry
+			 * with the current stateid.
+			 */
+			pnfs_mark_layout_stateid_invalid(lo, &head);
+			spin_unlock(&inode->i_lock);
+			pnfs_free_lseg_list(&head);
+			nfs_commit_inode(inode, 0);
+		} else
+			spin_unlock(&inode->i_lock);
+		break;
+	case -NFS4ERR_OLD_STATEID:
+		spin_lock(&inode->i_lock);
+		if (pnfs_layout_is_valid(lo) &&
+		    nfs4_stateid_match_other(&data->args.errors[0].stateid,
+					&lo->plh_stateid)) {
+			/* Do we need to delay before resending? */
+			if (!nfs4_stateid_is_newer(&lo->plh_stateid,
+						&data->args.errors[0].stateid))
+				rpc_delay(task, HZ);
+			rpc_restart_call_prepare(task);
+		}
+		spin_unlock(&inode->i_lock);
+		break;
+	case -ENOTSUPP:
+	case -EOPNOTSUPP:
+		NFS_SERVER(inode)->caps &= ~NFS_CAP_LAYOUTERROR;
+	}
+}
+
+static void
+nfs42_layouterror_release(void *calldata)
+{
+	struct nfs42_layouterror_data *data = calldata;
+
+	nfs42_free_layouterror_data(data);
+}
+
+static const struct rpc_call_ops nfs42_layouterror_ops = {
+	.rpc_call_prepare = nfs42_layouterror_prepare,
+	.rpc_call_done = nfs42_layouterror_done,
+	.rpc_release = nfs42_layouterror_release,
+};
+
+int nfs42_proc_layouterror(struct pnfs_layout_segment *lseg,
+		const struct nfs42_layout_error *errors, size_t n)
+{
+	struct inode *inode = lseg->pls_layout->plh_inode;
+	struct nfs42_layouterror_data *data;
+	struct rpc_task *task;
+	struct rpc_message msg = {
+		.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTERROR],
+	};
+	struct rpc_task_setup task_setup = {
+		.rpc_message = &msg,
+		.callback_ops = &nfs42_layouterror_ops,
+		.flags = RPC_TASK_ASYNC,
+	};
+	unsigned int i;
+
+	if (!nfs_server_capable(inode, NFS_CAP_LAYOUTERROR))
+		return -EOPNOTSUPP;
+	if (n > NFS42_LAYOUTERROR_MAX)
+		return -EINVAL;
+	data = nfs42_alloc_layouterror_data(lseg, GFP_NOFS);
+	if (!data)
+		return -ENOMEM;
+	for (i = 0; i < n; i++) {
+		data->args.errors[i] = errors[i];
+		data->args.num_errors++;
+		data->res.num_errors++;
+	}
+	msg.rpc_argp = &data->args;
+	msg.rpc_resp = &data->res;
+	task_setup.callback_data = data;
+	task_setup.rpc_client = NFS_SERVER(inode)->client;
+	nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0, 0);
+	task = rpc_run_task(&task_setup);
+	if (IS_ERR(task))
+		return PTR_ERR(task);
+	rpc_put_task(task);
+	return 0;
+}
+EXPORT_SYMBOL_GPL(nfs42_proc_layouterror);
+
 static int _nfs42_proc_clone(struct rpc_message *msg, struct file *src_f,
 		struct file *dst_f, struct nfs_lock_context *src_lock,
 		struct nfs_lock_context *dst_lock, loff_t src_offset,
diff --git a/fs/nfs/nfs42xdr.c b/fs/nfs/nfs42xdr.c
index 69f72ed2bf87..aed865a84629 100644
--- a/fs/nfs/nfs42xdr.c
+++ b/fs/nfs/nfs42xdr.c
@@ -51,6 +51,15 @@
 					1 /* opaque devaddr4 length */ + \
 					XDR_QUADLEN(PNFS_LAYOUTSTATS_MAXSIZE))
 #define decode_layoutstats_maxsz	(op_decode_hdr_maxsz)
+#define encode_device_error_maxsz	(XDR_QUADLEN(NFS4_DEVICEID4_SIZE) + \
+					1 /* status */ + 1 /* opnum */)
+#define encode_layouterror_maxsz	(op_decode_hdr_maxsz + \
+					2 /* offset */ + \
+					2 /* length */ + \
+					encode_stateid_maxsz + \
+					1 /* Array size */ + \
+					encode_device_error_maxsz)
+#define decode_layouterror_maxsz	(op_decode_hdr_maxsz)
 #define encode_clone_maxsz		(encode_stateid_maxsz + \
 					encode_stateid_maxsz + \
 					2 /* src offset */ + \
@@ -59,43 +68,53 @@
 #define decode_clone_maxsz		(op_decode_hdr_maxsz)
 
 #define NFS4_enc_allocate_sz		(compound_encode_hdr_maxsz + \
+					 encode_sequence_maxsz + \
 					 encode_putfh_maxsz + \
 					 encode_allocate_maxsz + \
 					 encode_getattr_maxsz)
 #define NFS4_dec_allocate_sz		(compound_decode_hdr_maxsz + \
+					 decode_sequence_maxsz + \
 					 decode_putfh_maxsz + \
 					 decode_allocate_maxsz + \
 					 decode_getattr_maxsz)
 #define NFS4_enc_copy_sz		(compound_encode_hdr_maxsz + \
+					 encode_sequence_maxsz + \
 					 encode_putfh_maxsz + \
 					 encode_savefh_maxsz + \
 					 encode_putfh_maxsz + \
 					 encode_copy_maxsz + \
 					 encode_commit_maxsz)
 #define NFS4_dec_copy_sz		(compound_decode_hdr_maxsz + \
+					 decode_sequence_maxsz + \
 					 decode_putfh_maxsz + \
 					 decode_savefh_maxsz + \
 					 decode_putfh_maxsz + \
 					 decode_copy_maxsz + \
 					 decode_commit_maxsz)
 #define NFS4_enc_offload_cancel_sz	(compound_encode_hdr_maxsz + \
+					 encode_sequence_maxsz + \
 					 encode_putfh_maxsz + \
 					 encode_offload_cancel_maxsz)
 #define NFS4_dec_offload_cancel_sz	(compound_decode_hdr_maxsz + \
+					 decode_sequence_maxsz + \
 					 decode_putfh_maxsz + \
 					 decode_offload_cancel_maxsz)
 #define NFS4_enc_deallocate_sz		(compound_encode_hdr_maxsz + \
+					 encode_sequence_maxsz + \
 					 encode_putfh_maxsz + \
 					 encode_deallocate_maxsz + \
 					 encode_getattr_maxsz)
 #define NFS4_dec_deallocate_sz		(compound_decode_hdr_maxsz + \
+					 decode_sequence_maxsz + \
 					 decode_putfh_maxsz + \
 					 decode_deallocate_maxsz + \
 					 decode_getattr_maxsz)
 #define NFS4_enc_seek_sz		(compound_encode_hdr_maxsz + \
+					 encode_sequence_maxsz + \
 					 encode_putfh_maxsz + \
 					 encode_seek_maxsz)
 #define NFS4_dec_seek_sz		(compound_decode_hdr_maxsz + \
+					 decode_sequence_maxsz + \
 					 decode_putfh_maxsz + \
 					 decode_seek_maxsz)
 #define NFS4_enc_layoutstats_sz		(compound_encode_hdr_maxsz + \
@@ -106,6 +125,16 @@
 					 decode_sequence_maxsz + \
 					 decode_putfh_maxsz + \
 					 PNFS_LAYOUTSTATS_MAXDEV * decode_layoutstats_maxsz)
+#define NFS4_enc_layouterror_sz		(compound_encode_hdr_maxsz + \
+					 encode_sequence_maxsz + \
+					 encode_putfh_maxsz + \
+					 NFS42_LAYOUTERROR_MAX * \
+					 encode_layouterror_maxsz)
+#define NFS4_dec_layouterror_sz		(compound_decode_hdr_maxsz + \
+					 decode_sequence_maxsz + \
+					 decode_putfh_maxsz + \
+					 NFS42_LAYOUTERROR_MAX * \
+					 decode_layouterror_maxsz)
 #define NFS4_enc_clone_sz		(compound_encode_hdr_maxsz + \
 					 encode_sequence_maxsz + \
 					 encode_putfh_maxsz + \
@@ -223,6 +252,34 @@ static void encode_clone(struct xdr_stream *xdr,
 	xdr_encode_hyper(p, args->count);
 }
 
+static void encode_device_error(struct xdr_stream *xdr,
+				const struct nfs42_device_error *error)
+{
+	__be32 *p;
+
+	p = reserve_space(xdr, NFS4_DEVICEID4_SIZE + 2*4);
+	p = xdr_encode_opaque_fixed(p, error->dev_id.data,
+			NFS4_DEVICEID4_SIZE);
+	*p++ = cpu_to_be32(error->status);
+	*p = cpu_to_be32(error->opnum);
+}
+
+static void encode_layouterror(struct xdr_stream *xdr,
+			       const struct nfs42_layout_error *args,
+			       struct compound_hdr *hdr)
+{
+	__be32 *p;
+
+	encode_op_hdr(xdr, OP_LAYOUTERROR, decode_layouterror_maxsz, hdr);
+	p = reserve_space(xdr, 8 + 8);
+	p = xdr_encode_hyper(p, args->offset);
+	p = xdr_encode_hyper(p, args->length);
+	encode_nfs4_stateid(xdr, &args->stateid);
+	p = reserve_space(xdr, 4);
+	*p = cpu_to_be32(1);
+	encode_device_error(xdr, &args->errors[0]);
+}
+
 /*
  * Encode ALLOCATE request
  */
@@ -381,6 +438,27 @@ static void nfs4_xdr_enc_clone(struct rpc_rqst *req,
 	encode_nops(&hdr);
 }
 
+/*
+ * Encode LAYOUTERROR request
+ */
+static void nfs4_xdr_enc_layouterror(struct rpc_rqst *req,
+				     struct xdr_stream *xdr,
+				     const void *data)
+{
+	const struct nfs42_layouterror_args *args = data;
+	struct compound_hdr hdr = {
+		.minorversion = nfs4_xdr_minorversion(&args->seq_args),
+	};
+	int i;
+
+	encode_compound_hdr(xdr, req, &hdr);
+	encode_sequence(xdr, &args->seq_args, &hdr);
+	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
+	for (i = 0; i < args->num_errors; i++)
+		encode_layouterror(xdr, &args->errors[i], &hdr);
+	encode_nops(&hdr);
+}
+
 static int decode_allocate(struct xdr_stream *xdr, struct nfs42_falloc_res *res)
 {
 	return decode_op_hdr(xdr, OP_ALLOCATE);
@@ -394,7 +472,7 @@ static int decode_write_response(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	count = be32_to_cpup(p);
 	if (count > 1)
 		return -EREMOTEIO;
@@ -402,18 +480,14 @@ static int decode_write_response(struct xdr_stream *xdr,
 		status = decode_opaque_fixed(xdr, &res->stateid,
 				NFS4_STATEID_SIZE);
 		if (unlikely(status))
-			goto out_overflow;
+			return -EIO;
 	}
 	p = xdr_inline_decode(xdr, 8 + 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	p = xdr_decode_hyper(p, &res->count);
 	res->verifier.committed = be32_to_cpup(p);
 	return decode_verifier(xdr, &res->verifier.verifier);
-
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_copy_requirements(struct xdr_stream *xdr,
@@ -422,14 +496,11 @@ static int decode_copy_requirements(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 4 + 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 
 	res->consecutive = be32_to_cpup(p++);
 	res->synchronous = be32_to_cpup(p++);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_copy(struct xdr_stream *xdr, struct nfs42_copy_res *res)
@@ -474,15 +545,11 @@ static int decode_seek(struct xdr_stream *xdr, struct nfs42_seek_res *res)
 
 	p = xdr_inline_decode(xdr, 4 + 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 
 	res->sr_eof = be32_to_cpup(p++);
 	p = xdr_decode_hyper(p, &res->sr_offset);
 	return 0;
-
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_layoutstats(struct xdr_stream *xdr)
@@ -495,6 +562,11 @@ static int decode_clone(struct xdr_stream *xdr)
 	return decode_op_hdr(xdr, OP_CLONE);
 }
 
+static int decode_layouterror(struct xdr_stream *xdr)
+{
+	return decode_op_hdr(xdr, OP_LAYOUTERROR);
+}
+
 /*
  * Decode ALLOCATE request
  */
@@ -704,4 +776,30 @@ out:
 	return status;
 }
 
+/*
+ * Decode LAYOUTERROR request
+ */
+static int nfs4_xdr_dec_layouterror(struct rpc_rqst *rqstp,
+				    struct xdr_stream *xdr,
+				    void *data)
+{
+	struct nfs42_layouterror_res *res = data;
+	struct compound_hdr hdr;
+	int status, i;
+
+	status = decode_compound_hdr(xdr, &hdr);
+	if (status)
+		goto out;
+	status = decode_sequence(xdr, &res->seq_res, rqstp);
+	if (status)
+		goto out;
+	status = decode_putfh(xdr);
+
+	for (i = 0; i < res->num_errors && status == 0; i++)
+		status = decode_layouterror(xdr);
+out:
+	res->rpc_status = status;
+	return status;
+}
+
 #endif /* __LINUX_FS_NFS_NFS4_2XDR_H */
diff --git a/fs/nfs/nfs4_fs.h b/fs/nfs/nfs4_fs.h
index 06ac3d9ac7c6..8a38a254f516 100644
--- a/fs/nfs/nfs4_fs.h
+++ b/fs/nfs/nfs4_fs.h
@@ -206,6 +206,7 @@ struct nfs4_exception {
 	unsigned char delay : 1,
 		      recovering : 1,
 		      retry : 1;
+	bool interruptible;
 };
 
 struct nfs4_state_recovery_ops {
diff --git a/fs/nfs/nfs4client.c b/fs/nfs/nfs4client.c
index 2548405da1f7..81b9b6d7927a 100644
--- a/fs/nfs/nfs4client.c
+++ b/fs/nfs/nfs4client.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
@@ -42,7 +43,7 @@ static int nfs_get_cb_ident_idr(struct nfs_client *clp, int minorversion)
 }
 
 #ifdef CONFIG_NFS_V4_1
-/**
+/*
  * Per auth flavor data server rpc clients
  */
 struct nfs4_ds_server {
@@ -51,7 +52,9 @@ struct nfs4_ds_server {
 };
 
 /**
- * Common lookup case for DS I/O
+ * nfs4_find_ds_client - Common lookup case for DS I/O
+ * @ds_clp: pointer to the DS's nfs_client
+ * @flavor: rpc auth flavour to match
  */
 static struct nfs4_ds_server *
 nfs4_find_ds_client(struct nfs_client *ds_clp, rpc_authflavor_t flavor)
@@ -118,9 +121,13 @@ nfs4_free_ds_server(struct nfs4_ds_server *dss)
 }
 
 /**
-* Find or create a DS rpc client with th MDS server rpc client auth flavor
-* in the nfs_client cl_ds_clients list.
-*/
+ * nfs4_find_or_create_ds_client - Find or create a DS rpc client
+ * @ds_clp: pointer to the DS's nfs_client
+ * @inode: pointer to the inode
+ *
+ * Find or create a DS rpc client with th MDS server rpc client auth flavor
+ * in the nfs_client cl_ds_clients list.
+ */
 struct rpc_clnt *
 nfs4_find_or_create_ds_client(struct nfs_client *ds_clp, struct inode *inode)
 {
@@ -145,7 +152,6 @@ static void
 nfs4_shutdown_ds_clients(struct nfs_client *clp)
 {
 	struct nfs4_ds_server *dss;
-	LIST_HEAD(shutdown_list);
 
 	while (!list_empty(&clp->cl_ds_clients)) {
 		dss = list_entry(clp->cl_ds_clients.next,
@@ -284,7 +290,7 @@ static int nfs4_init_callback(struct nfs_client *clp)
 
 /**
  * nfs40_init_client - nfs_client initialization tasks for NFSv4.0
- * @clp - nfs_client to initialize
+ * @clp: nfs_client to initialize
  *
  * Returns zero on success, or a negative errno if some error occurred.
  */
@@ -312,7 +318,7 @@ int nfs40_init_client(struct nfs_client *clp)
 
 /**
  * nfs41_init_client - nfs_client initialization tasks for NFSv4.1+
- * @clp - nfs_client to initialize
+ * @clp: nfs_client to initialize
  *
  * Returns zero on success, or a negative errno if some error occurred.
  */
@@ -360,9 +366,7 @@ static int nfs4_init_client_minor_version(struct nfs_client *clp)
  * nfs4_init_client - Initialise an NFS4 client record
  *
  * @clp: nfs_client to initialise
- * @timeparms: timeout parameters for underlying RPC transport
- * @ip_addr: callback IP address in presentation format
- * @authflavor: authentication flavor for underlying RPC transport
+ * @cl_init: pointer to nfs_client_initdata
  *
  * Returns pointer to an NFS client, or an ERR_PTR value.
  */
@@ -649,13 +653,13 @@ nfs4_check_server_scope(struct nfs41_server_scope *s1,
 
 /**
  * nfs4_detect_session_trunking - Checks for session trunking.
- *
- * Called after a successful EXCHANGE_ID on a multi-addr connection.
- * Upon success, add the transport.
- *
  * @clp:    original mount nfs_client
  * @res:    result structure from an exchange_id using the original mount
  *          nfs_client with a new multi_addr transport
+ * @xprt:   pointer to the transport to add.
+ *
+ * Called after a successful EXCHANGE_ID on a multi-addr connection.
+ * Upon success, add the transport.
  *
  * Returns zero on success, otherwise -EINVAL
  *
@@ -867,6 +871,7 @@ static int nfs4_set_client(struct nfs_server *server,
 		.minorversion = minorversion,
 		.net = net,
 		.timeparms = timeparms,
+		.cred = server->cred,
 	};
 	struct nfs_client *clp;
 
@@ -928,6 +933,7 @@ struct nfs_client *nfs4_set_ds_client(struct nfs_server *mds_srv,
 		.minorversion = minor_version,
 		.net = mds_clp->cl_net,
 		.timeparms = &ds_timeout,
+		.cred = mds_srv->cred,
 	};
 	char buf[INET6_ADDRSTRLEN + 1];
 
@@ -1104,6 +1110,8 @@ struct nfs_server *nfs4_create_server(struct nfs_mount_info *mount_info,
 	if (!server)
 		return ERR_PTR(-ENOMEM);
 
+	server->cred = get_cred(current_cred());
+
 	auth_probe = mount_info->parsed->auth_info.flavor_len < 1;
 
 	/* set up the general RPC client */
@@ -1140,6 +1148,8 @@ struct nfs_server *nfs4_create_referral_server(struct nfs_clone_mount *data,
 	parent_server = NFS_SB(data->sb);
 	parent_client = parent_server->nfs_client;
 
+	server->cred = get_cred(parent_server->cred);
+
 	/* Initialise the client representation from the parent server */
 	nfs_server_copy_userdata(server, parent_server);
 
diff --git a/fs/nfs/nfs4file.c b/fs/nfs/nfs4file.c
index 45b2322e092d..f4157eb1f69d 100644
--- a/fs/nfs/nfs4file.c
+++ b/fs/nfs/nfs4file.c
@@ -125,17 +125,36 @@ nfs4_file_flush(struct file *file, fl_owner_t id)
 		return filemap_fdatawrite(file->f_mapping);
 
 	/* Flush writes to the server and return any errors */
-	return vfs_fsync(file, 0);
+	return nfs_wb_all(inode);
 }
 
 #ifdef CONFIG_NFS_V4_2
+static ssize_t __nfs4_copy_file_range(struct file *file_in, loff_t pos_in,
+				      struct file *file_out, loff_t pos_out,
+				      size_t count, unsigned int flags)
+{
+	/* Only offload copy if superblock is the same */
+	if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb)
+		return -EXDEV;
+	if (!nfs_server_capable(file_inode(file_out), NFS_CAP_COPY))
+		return -EOPNOTSUPP;
+	if (file_inode(file_in) == file_inode(file_out))
+		return -EOPNOTSUPP;
+	return nfs42_proc_copy(file_in, pos_in, file_out, pos_out, count);
+}
+
 static ssize_t nfs4_copy_file_range(struct file *file_in, loff_t pos_in,
 				    struct file *file_out, loff_t pos_out,
 				    size_t count, unsigned int flags)
 {
-	if (file_inode(file_in) == file_inode(file_out))
-		return -EINVAL;
-	return nfs42_proc_copy(file_in, pos_in, file_out, pos_out, count);
+	ssize_t ret;
+
+	ret = __nfs4_copy_file_range(file_in, pos_in, file_out, pos_out, count,
+				     flags);
+	if (ret == -EOPNOTSUPP || ret == -EXDEV)
+		ret = generic_copy_file_range(file_in, pos_in, file_out,
+					      pos_out, count, flags);
+	return ret;
 }
 
 static loff_t nfs4_file_llseek(struct file *filep, loff_t offset, int whence)
@@ -185,7 +204,7 @@ static loff_t nfs42_remap_file_range(struct file *src_file, loff_t src_off,
 	bool same_inode = false;
 	int ret;
 
-	if (remap_flags & ~REMAP_FILE_ADVISORY)
+	if (remap_flags & ~(REMAP_FILE_DEDUP | REMAP_FILE_ADVISORY))
 		return -EINVAL;
 
 	/* check alignment w.r.t. clone_blksize */
diff --git a/fs/nfs/nfs4idmap.c b/fs/nfs/nfs4idmap.c
index 3f23b6840547..1e7296395d71 100644
--- a/fs/nfs/nfs4idmap.c
+++ b/fs/nfs/nfs4idmap.c
@@ -44,6 +44,7 @@
 #include <linux/keyctl.h>
 #include <linux/key-type.h>
 #include <keys/user-type.h>
+#include <keys/request_key_auth-type.h>
 #include <linux/module.h>
 
 #include "internal.h"
@@ -59,7 +60,7 @@ static struct key_type key_type_id_resolver_legacy;
 struct idmap_legacy_upcalldata {
 	struct rpc_pipe_msg pipe_msg;
 	struct idmap_msg idmap_msg;
-	struct key_construction	*key_cons;
+	struct key	*authkey;
 	struct idmap *idmap;
 };
 
@@ -68,8 +69,16 @@ struct idmap {
 	struct rpc_pipe		*idmap_pipe;
 	struct idmap_legacy_upcalldata *idmap_upcall_data;
 	struct mutex		idmap_mutex;
+	const struct cred	*cred;
 };
 
+static struct user_namespace *idmap_userns(const struct idmap *idmap)
+{
+	if (idmap && idmap->cred)
+		return idmap->cred->user_ns;
+	return &init_user_ns;
+}
+
 /**
  * nfs_fattr_init_names - initialise the nfs_fattr owner_name/group_name fields
  * @fattr: fully initialised struct nfs_fattr
@@ -270,18 +279,19 @@ static struct key *nfs_idmap_request_key(const char *name, size_t namelen,
 					 const char *type, struct idmap *idmap)
 {
 	char *desc;
-	struct key *rkey;
+	struct key *rkey = ERR_PTR(-EAGAIN);
 	ssize_t ret;
 
 	ret = nfs_idmap_get_desc(name, namelen, type, strlen(type), &desc);
 	if (ret < 0)
 		return ERR_PTR(ret);
 
-	rkey = request_key(&key_type_id_resolver, desc, "");
+	if (!idmap->cred || idmap->cred->user_ns == &init_user_ns)
+		rkey = request_key(&key_type_id_resolver, desc, "");
 	if (IS_ERR(rkey)) {
 		mutex_lock(&idmap->idmap_mutex);
 		rkey = request_key_with_auxdata(&key_type_id_resolver_legacy,
-						desc, "", 0, idmap);
+						desc, NULL, "", 0, idmap);
 		mutex_unlock(&idmap->idmap_mutex);
 	}
 	if (!IS_ERR(rkey))
@@ -384,7 +394,7 @@ static const match_table_t nfs_idmap_tokens = {
 	{ Opt_find_err, NULL }
 };
 
-static int nfs_idmap_legacy_upcall(struct key_construction *, const char *, void *);
+static int nfs_idmap_legacy_upcall(struct key *, void *);
 static ssize_t idmap_pipe_downcall(struct file *, const char __user *,
 				   size_t);
 static void idmap_release_pipe(struct inode *);
@@ -451,6 +461,9 @@ nfs_idmap_new(struct nfs_client *clp)
 	if (idmap == NULL)
 		return -ENOMEM;
 
+	mutex_init(&idmap->idmap_mutex);
+	idmap->cred = get_cred(clp->cl_rpcclient->cl_cred);
+
 	rpc_init_pipe_dir_object(&idmap->idmap_pdo,
 			&nfs_idmap_pipe_dir_object_ops,
 			idmap);
@@ -461,7 +474,6 @@ nfs_idmap_new(struct nfs_client *clp)
 		goto err;
 	}
 	idmap->idmap_pipe = pipe;
-	mutex_init(&idmap->idmap_mutex);
 
 	error = rpc_add_pipe_dir_object(clp->cl_net,
 			&clp->cl_rpcclient->cl_pipedir_objects,
@@ -474,6 +486,7 @@ nfs_idmap_new(struct nfs_client *clp)
 err_destroy_pipe:
 	rpc_destroy_pipe_data(idmap->idmap_pipe);
 err:
+	put_cred(idmap->cred);
 	kfree(idmap);
 	return error;
 }
@@ -490,6 +503,7 @@ nfs_idmap_delete(struct nfs_client *clp)
 			&clp->cl_rpcclient->cl_pipedir_objects,
 			&idmap->idmap_pdo);
 	rpc_destroy_pipe_data(idmap->idmap_pipe);
+	put_cred(idmap->cred);
 	kfree(idmap);
 }
 
@@ -549,11 +563,12 @@ nfs_idmap_prepare_pipe_upcall(struct idmap *idmap,
 static void
 nfs_idmap_complete_pipe_upcall_locked(struct idmap *idmap, int ret)
 {
-	struct key_construction *cons = idmap->idmap_upcall_data->key_cons;
+	struct key *authkey = idmap->idmap_upcall_data->authkey;
 
 	kfree(idmap->idmap_upcall_data);
 	idmap->idmap_upcall_data = NULL;
-	complete_request_key(cons, ret);
+	complete_request_key(authkey, ret);
+	key_put(authkey);
 }
 
 static void
@@ -563,15 +578,14 @@ nfs_idmap_abort_pipe_upcall(struct idmap *idmap, int ret)
 		nfs_idmap_complete_pipe_upcall_locked(idmap, ret);
 }
 
-static int nfs_idmap_legacy_upcall(struct key_construction *cons,
-				   const char *op,
-				   void *aux)
+static int nfs_idmap_legacy_upcall(struct key *authkey, void *aux)
 {
 	struct idmap_legacy_upcalldata *data;
+	struct request_key_auth *rka = get_request_key_auth(authkey);
 	struct rpc_pipe_msg *msg;
 	struct idmap_msg *im;
 	struct idmap *idmap = (struct idmap *)aux;
-	struct key *key = cons->key;
+	struct key *key = rka->target_key;
 	int ret = -ENOKEY;
 
 	if (!aux)
@@ -586,7 +600,7 @@ static int nfs_idmap_legacy_upcall(struct key_construction *cons,
 	msg = &data->pipe_msg;
 	im = &data->idmap_msg;
 	data->idmap = idmap;
-	data->key_cons = cons;
+	data->authkey = key_get(authkey);
 
 	ret = nfs_idmap_prepare_message(key->description, idmap, im, msg);
 	if (ret < 0)
@@ -604,7 +618,7 @@ static int nfs_idmap_legacy_upcall(struct key_construction *cons,
 out2:
 	kfree(data);
 out1:
-	complete_request_key(cons, ret);
+	complete_request_key(authkey, ret);
 	return ret;
 }
 
@@ -651,9 +665,10 @@ out:
 static ssize_t
 idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 {
+	struct request_key_auth *rka;
 	struct rpc_inode *rpci = RPC_I(file_inode(filp));
 	struct idmap *idmap = (struct idmap *)rpci->private;
-	struct key_construction *cons;
+	struct key *authkey;
 	struct idmap_msg im;
 	size_t namelen_in;
 	int ret = -ENOKEY;
@@ -665,7 +680,8 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 	if (idmap->idmap_upcall_data == NULL)
 		goto out_noupcall;
 
-	cons = idmap->idmap_upcall_data->key_cons;
+	authkey = idmap->idmap_upcall_data->authkey;
+	rka = get_request_key_auth(authkey);
 
 	if (mlen != sizeof(im)) {
 		ret = -ENOSPC;
@@ -690,9 +706,9 @@ idmap_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 
 	ret = nfs_idmap_read_and_verify_message(&im,
 			&idmap->idmap_upcall_data->idmap_msg,
-			cons->key, cons->authkey);
+			rka->target_key, authkey);
 	if (ret >= 0) {
-		key_set_timeout(cons->key, nfs_idmap_cache_timeout);
+		key_set_timeout(rka->target_key, nfs_idmap_cache_timeout);
 		ret = mlen;
 	}
 
@@ -732,7 +748,7 @@ int nfs_map_name_to_uid(const struct nfs_server *server, const char *name, size_
 	if (!nfs_map_string_to_numeric(name, namelen, &id))
 		ret = nfs_idmap_lookup_id(name, namelen, "uid", &id, idmap);
 	if (ret == 0) {
-		*uid = make_kuid(&init_user_ns, id);
+		*uid = make_kuid(idmap_userns(idmap), id);
 		if (!uid_valid(*uid))
 			ret = -ERANGE;
 	}
@@ -749,7 +765,7 @@ int nfs_map_group_to_gid(const struct nfs_server *server, const char *name, size
 	if (!nfs_map_string_to_numeric(name, namelen, &id))
 		ret = nfs_idmap_lookup_id(name, namelen, "gid", &id, idmap);
 	if (ret == 0) {
-		*gid = make_kgid(&init_user_ns, id);
+		*gid = make_kgid(idmap_userns(idmap), id);
 		if (!gid_valid(*gid))
 			ret = -ERANGE;
 	}
@@ -763,7 +779,7 @@ int nfs_map_uid_to_name(const struct nfs_server *server, kuid_t uid, char *buf,
 	int ret = -EINVAL;
 	__u32 id;
 
-	id = from_kuid(&init_user_ns, uid);
+	id = from_kuid_munged(idmap_userns(idmap), uid);
 	if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
 		ret = nfs_idmap_lookup_name(id, "user", buf, buflen, idmap);
 	if (ret < 0)
@@ -777,7 +793,7 @@ int nfs_map_gid_to_group(const struct nfs_server *server, kgid_t gid, char *buf,
 	int ret = -EINVAL;
 	__u32 id;
 
-	id = from_kgid(&init_user_ns, gid);
+	id = from_kgid_munged(idmap_userns(idmap), gid);
 	if (!(server->caps & NFS_CAP_UIDGID_NOMAP))
 		ret = nfs_idmap_lookup_name(id, "group", buf, buflen, idmap);
 	if (ret < 0)
diff --git a/fs/nfs/nfs4namespace.c b/fs/nfs/nfs4namespace.c
index 24f06dcc2b08..2e460c33ae48 100644
--- a/fs/nfs/nfs4namespace.c
+++ b/fs/nfs/nfs4namespace.c
@@ -137,6 +137,7 @@ static size_t nfs_parse_server_name(char *string, size_t len,
 
 /**
  * nfs_find_best_sec - Find a security mechanism supported locally
+ * @clnt: pointer to rpc_clnt
  * @server: NFS server struct
  * @flavors: List of security tuples returned by SECINFO procedure
  *
@@ -288,8 +289,8 @@ static struct vfsmount *try_location(struct nfs_clone_mount *mountdata,
 
 /**
  * nfs_follow_referral - set up mountpoint when hitting a referral on moved error
- * @dentry - parent directory
- * @locations - array of NFSv4 server location information
+ * @dentry: parent directory
+ * @locations: array of NFSv4 server location information
  *
  */
 static struct vfsmount *nfs_follow_referral(struct dentry *dentry,
diff --git a/fs/nfs/nfs4proc.c b/fs/nfs/nfs4proc.c
index 557a5d636183..6418cb6c079b 100644
--- a/fs/nfs/nfs4proc.c
+++ b/fs/nfs/nfs4proc.c
@@ -400,17 +400,32 @@ static long nfs4_update_delay(long *timeout)
 	return ret;
 }
 
-static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
+static int nfs4_delay_killable(long *timeout)
 {
-	int res = 0;
-
 	might_sleep();
 
 	freezable_schedule_timeout_killable_unsafe(
 		nfs4_update_delay(timeout));
-	if (fatal_signal_pending(current))
-		res = -ERESTARTSYS;
-	return res;
+	if (!__fatal_signal_pending(current))
+		return 0;
+	return -EINTR;
+}
+
+static int nfs4_delay_interruptible(long *timeout)
+{
+	might_sleep();
+
+	freezable_schedule_timeout_interruptible(nfs4_update_delay(timeout));
+	if (!signal_pending(current))
+		return 0;
+	return __fatal_signal_pending(current) ? -EINTR :-ERESTARTSYS;
+}
+
+static int nfs4_delay(long *timeout, bool interruptible)
+{
+	if (interruptible)
+		return nfs4_delay_interruptible(timeout);
+	return nfs4_delay_killable(timeout);
 }
 
 /* This is the error handling routine for processes that are allowed
@@ -546,7 +561,8 @@ int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_
 
 	ret = nfs4_do_handle_exception(server, errorcode, exception);
 	if (exception->delay) {
-		ret = nfs4_delay(server->client, &exception->timeout);
+		ret = nfs4_delay(&exception->timeout,
+				exception->interruptible);
 		goto out_retry;
 	}
 	if (exception->recovering) {
@@ -730,33 +746,41 @@ static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
 	res->sr_slot = NULL;
 }
 
+static void nfs4_slot_sequence_record_sent(struct nfs4_slot *slot,
+		u32 seqnr)
+{
+	if ((s32)(seqnr - slot->seq_nr_highest_sent) > 0)
+		slot->seq_nr_highest_sent = seqnr;
+}
+static void nfs4_slot_sequence_acked(struct nfs4_slot *slot,
+		u32 seqnr)
+{
+	slot->seq_nr_highest_sent = seqnr;
+	slot->seq_nr_last_acked = seqnr;
+}
+
 static int nfs41_sequence_process(struct rpc_task *task,
 		struct nfs4_sequence_res *res)
 {
 	struct nfs4_session *session;
 	struct nfs4_slot *slot = res->sr_slot;
 	struct nfs_client *clp;
-	bool interrupted = false;
 	int ret = 1;
 
 	if (slot == NULL)
 		goto out_noaction;
 	/* don't increment the sequence number if the task wasn't sent */
-	if (!RPC_WAS_SENT(task))
+	if (!RPC_WAS_SENT(task) || slot->seq_done)
 		goto out;
 
 	session = slot->table->session;
 
-	if (slot->interrupted) {
-		if (res->sr_status != -NFS4ERR_DELAY)
-			slot->interrupted = 0;
-		interrupted = true;
-	}
-
 	trace_nfs4_sequence_done(session, res);
 	/* Check the SEQUENCE operation status */
 	switch (res->sr_status) {
 	case 0:
+		/* Mark this sequence number as having been acked */
+		nfs4_slot_sequence_acked(slot, slot->seq_nr);
 		/* Update the slot's sequence and clientid lease timer */
 		slot->seq_done = 1;
 		clp = session->clp;
@@ -771,9 +795,9 @@ static int nfs41_sequence_process(struct rpc_task *task,
 		 * sr_status remains 1 if an RPC level error occurred.
 		 * The server may or may not have processed the sequence
 		 * operation..
-		 * Mark the slot as having hosted an interrupted RPC call.
 		 */
-		slot->interrupted = 1;
+		nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
+		slot->seq_done = 1;
 		goto out;
 	case -NFS4ERR_DELAY:
 		/* The server detected a resend of the RPC call and
@@ -784,6 +808,7 @@ static int nfs41_sequence_process(struct rpc_task *task,
 			__func__,
 			slot->slot_nr,
 			slot->seq_nr);
+		nfs4_slot_sequence_acked(slot, slot->seq_nr);
 		goto out_retry;
 	case -NFS4ERR_RETRY_UNCACHED_REP:
 	case -NFS4ERR_SEQ_FALSE_RETRY:
@@ -791,6 +816,7 @@ static int nfs41_sequence_process(struct rpc_task *task,
 		 * The server thinks we tried to replay a request.
 		 * Retry the call after bumping the sequence ID.
 		 */
+		nfs4_slot_sequence_acked(slot, slot->seq_nr);
 		goto retry_new_seq;
 	case -NFS4ERR_BADSLOT:
 		/*
@@ -801,21 +827,28 @@ static int nfs41_sequence_process(struct rpc_task *task,
 			goto session_recover;
 		goto retry_nowait;
 	case -NFS4ERR_SEQ_MISORDERED:
+		nfs4_slot_sequence_record_sent(slot, slot->seq_nr);
 		/*
-		 * Was the last operation on this sequence interrupted?
-		 * If so, retry after bumping the sequence number.
+		 * Were one or more calls using this slot interrupted?
+		 * If the server never received the request, then our
+		 * transmitted slot sequence number may be too high.
 		 */
-		if (interrupted)
-			goto retry_new_seq;
-		/*
-		 * Could this slot have been previously retired?
-		 * If so, then the server may be expecting seq_nr = 1!
-		 */
-		if (slot->seq_nr != 1) {
-			slot->seq_nr = 1;
+		if ((s32)(slot->seq_nr - slot->seq_nr_last_acked) > 1) {
+			slot->seq_nr--;
 			goto retry_nowait;
 		}
-		goto session_recover;
+		/*
+		 * RFC5661:
+		 * A retry might be sent while the original request is
+		 * still in progress on the replier. The replier SHOULD
+		 * deal with the issue by returning NFS4ERR_DELAY as the
+		 * reply to SEQUENCE or CB_SEQUENCE operation, but
+		 * implementations MAY return NFS4ERR_SEQ_MISORDERED.
+		 *
+		 * Restart the search after a delay.
+		 */
+		slot->seq_nr = slot->seq_nr_highest_sent;
+		goto out_retry;
 	default:
 		/* Just update the slot sequence no. */
 		slot->seq_done = 1;
@@ -906,17 +939,6 @@ static const struct rpc_call_ops nfs41_call_sync_ops = {
 	.rpc_call_done = nfs41_call_sync_done,
 };
 
-static void
-nfs4_sequence_process_interrupted(struct nfs_client *client,
-		struct nfs4_slot *slot, const struct cred *cred)
-{
-	struct rpc_task *task;
-
-	task = _nfs41_proc_sequence(client, cred, slot, true);
-	if (!IS_ERR(task))
-		rpc_put_task_async(task);
-}
-
 #else	/* !CONFIG_NFS_V4_1 */
 
 static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
@@ -937,16 +959,15 @@ int nfs4_sequence_done(struct rpc_task *task,
 }
 EXPORT_SYMBOL_GPL(nfs4_sequence_done);
 
-static void
-nfs4_sequence_process_interrupted(struct nfs_client *client,
-		struct nfs4_slot *slot, const struct cred *cred)
+#endif	/* !CONFIG_NFS_V4_1 */
+
+static void nfs41_sequence_res_init(struct nfs4_sequence_res *res)
 {
-	WARN_ON_ONCE(1);
-	slot->interrupted = 0;
+	res->sr_timestamp = jiffies;
+	res->sr_status_flags = 0;
+	res->sr_status = 1;
 }
 
-#endif	/* !CONFIG_NFS_V4_1 */
-
 static
 void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
 		struct nfs4_sequence_res *res,
@@ -958,10 +979,6 @@ void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
 	args->sa_slot = slot;
 
 	res->sr_slot = slot;
-	res->sr_timestamp = jiffies;
-	res->sr_status_flags = 0;
-	res->sr_status = 1;
-
 }
 
 int nfs4_setup_sequence(struct nfs_client *client,
@@ -977,43 +994,43 @@ int nfs4_setup_sequence(struct nfs_client *client,
 	if (res->sr_slot != NULL)
 		goto out_start;
 
-	if (session) {
+	if (session)
 		tbl = &session->fc_slot_table;
-		task->tk_timeout = 0;
-	}
 
-	for (;;) {
-		spin_lock(&tbl->slot_tbl_lock);
-		/* The state manager will wait until the slot table is empty */
-		if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
-			goto out_sleep;
-
-		slot = nfs4_alloc_slot(tbl);
-		if (IS_ERR(slot)) {
-			/* Try again in 1/4 second */
-			if (slot == ERR_PTR(-ENOMEM))
-				task->tk_timeout = HZ >> 2;
-			goto out_sleep;
-		}
-		spin_unlock(&tbl->slot_tbl_lock);
+	spin_lock(&tbl->slot_tbl_lock);
+	/* The state manager will wait until the slot table is empty */
+	if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
+		goto out_sleep;
 
-		if (likely(!slot->interrupted))
-			break;
-		nfs4_sequence_process_interrupted(client,
-				slot, task->tk_msg.rpc_cred);
+	slot = nfs4_alloc_slot(tbl);
+	if (IS_ERR(slot)) {
+		if (slot == ERR_PTR(-ENOMEM))
+			goto out_sleep_timeout;
+		goto out_sleep;
 	}
+	spin_unlock(&tbl->slot_tbl_lock);
 
 	nfs4_sequence_attach_slot(args, res, slot);
 
 	trace_nfs4_setup_sequence(session, args);
 out_start:
+	nfs41_sequence_res_init(res);
 	rpc_call_start(task);
 	return 0;
-
+out_sleep_timeout:
+	/* Try again in 1/4 second */
+	if (args->sa_privileged)
+		rpc_sleep_on_priority_timeout(&tbl->slot_tbl_waitq, task,
+				jiffies + (HZ >> 2), RPC_PRIORITY_PRIVILEGED);
+	else
+		rpc_sleep_on_timeout(&tbl->slot_tbl_waitq, task,
+				NULL, jiffies + (HZ >> 2));
+	spin_unlock(&tbl->slot_tbl_lock);
+	return -EAGAIN;
 out_sleep:
 	if (args->sa_privileged)
 		rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
-				NULL, RPC_PRIORITY_PRIVILEGED);
+				RPC_PRIORITY_PRIVILEGED);
 	else
 		rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
 	spin_unlock(&tbl->slot_tbl_lock);
@@ -1239,10 +1256,20 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
 	atomic_inc(&sp->so_count);
 	p->o_arg.open_flags = flags;
 	p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
-	p->o_arg.umask = current_umask();
 	p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
 	p->o_arg.share_access = nfs4_map_atomic_open_share(server,
 			fmode, flags);
+	if (flags & O_CREAT) {
+		p->o_arg.umask = current_umask();
+		p->o_arg.label = nfs4_label_copy(p->a_label, label);
+		if (c->sattr != NULL && c->sattr->ia_valid != 0) {
+			p->o_arg.u.attrs = &p->attrs;
+			memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
+
+			memcpy(p->o_arg.u.verifier.data, c->verf,
+					sizeof(p->o_arg.u.verifier.data));
+		}
+	}
 	/* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
 	 * will return permission denied for all bits until close */
 	if (!(flags & O_EXCL)) {
@@ -1266,7 +1293,6 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
 	p->o_arg.server = server;
 	p->o_arg.bitmask = nfs4_bitmask(server, label);
 	p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
-	p->o_arg.label = nfs4_label_copy(p->a_label, label);
 	switch (p->o_arg.claim) {
 	case NFS4_OPEN_CLAIM_NULL:
 	case NFS4_OPEN_CLAIM_DELEGATE_CUR:
@@ -1279,13 +1305,6 @@ static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
 	case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
 		p->o_arg.fh = NFS_FH(d_inode(dentry));
 	}
-	if (c != NULL && c->sattr != NULL && c->sattr->ia_valid != 0) {
-		p->o_arg.u.attrs = &p->attrs;
-		memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
-
-		memcpy(p->o_arg.u.verifier.data, c->verf,
-				sizeof(p->o_arg.u.verifier.data));
-	}
 	p->c_arg.fh = &p->o_res.fh;
 	p->c_arg.stateid = &p->o_res.stateid;
 	p->c_arg.seqid = p->o_arg.seqid;
@@ -1555,6 +1574,10 @@ static void nfs_clear_open_stateid(struct nfs4_state *state,
 
 static void nfs_set_open_stateid_locked(struct nfs4_state *state,
 		const nfs4_stateid *stateid, nfs4_stateid *freeme)
+	__must_hold(&state->owner->so_lock)
+	__must_hold(&state->seqlock)
+	__must_hold(RCU)
+
 {
 	DEFINE_WAIT(wait);
 	int status = 0;
@@ -2934,7 +2957,8 @@ static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
 	}
 
 out:
-	nfs4_sequence_free_slot(&opendata->o_res.seq_res);
+	if (!opendata->cancelled)
+		nfs4_sequence_free_slot(&opendata->o_res.seq_res);
 	return ret;
 }
 
@@ -3060,7 +3084,9 @@ static struct nfs4_state *nfs4_do_open(struct inode *dir,
 					int *opened)
 {
 	struct nfs_server *server = NFS_SERVER(dir);
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	struct nfs4_state *res;
 	struct nfs4_open_createattrs c = {
 		.label = label,
@@ -3673,7 +3699,9 @@ static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *f
 
 int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = nfs4_handle_exception(server,
@@ -3715,7 +3743,9 @@ static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
 static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
 		struct nfs_fsinfo *info)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = _nfs4_lookup_root(server, fhandle, info);
@@ -3942,7 +3972,9 @@ static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
 				struct nfs_fattr *fattr, struct nfs4_label *label,
 				struct inode *inode)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = _nfs4_proc_getattr(server, fhandle, fattr, label, inode);
@@ -4065,7 +4097,9 @@ static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
 				   const struct qstr *name, struct nfs_fh *fhandle,
 				   struct nfs_fattr *fattr, struct nfs4_label *label)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	struct rpc_clnt *client = *clnt;
 	int err;
 	do {
@@ -4169,7 +4203,9 @@ static int _nfs4_proc_lookupp(struct inode *inode,
 static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
 			     struct nfs_fattr *fattr, struct nfs4_label *label)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
@@ -4216,7 +4252,9 @@ static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry
 
 static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = _nfs4_proc_access(inode, entry);
@@ -4271,7 +4309,9 @@ static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
 static int nfs4_proc_readlink(struct inode *inode, struct page *page,
 		unsigned int pgbase, unsigned int pglen)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
@@ -4347,7 +4387,9 @@ _nfs4_proc_remove(struct inode *dir, const struct qstr *name, u32 ftype)
 
 static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	struct inode *inode = d_inode(dentry);
 	int err;
 
@@ -4368,7 +4410,9 @@ static int nfs4_proc_remove(struct inode *dir, struct dentry *dentry)
 
 static int nfs4_proc_rmdir(struct inode *dir, const struct qstr *name)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 
 	do {
@@ -4527,7 +4571,9 @@ out:
 
 static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = nfs4_handle_exception(NFS_SERVER(inode),
@@ -4634,7 +4680,9 @@ out:
 static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
 		struct page *page, unsigned int len, struct iattr *sattr)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	struct nfs4_label l, *label = NULL;
 	int err;
 
@@ -4673,7 +4721,9 @@ static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
 		struct iattr *sattr)
 {
 	struct nfs_server *server = NFS_SERVER(dir);
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	struct nfs4_label l, *label = NULL;
 	int err;
 
@@ -4733,7 +4783,9 @@ static int _nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
 static int nfs4_proc_readdir(struct dentry *dentry, const struct cred *cred,
 		u64 cookie, struct page **pages, unsigned int count, bool plus)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = _nfs4_proc_readdir(dentry, cred, cookie,
@@ -4784,7 +4836,9 @@ static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
 		struct iattr *sattr, dev_t rdev)
 {
 	struct nfs_server *server = NFS_SERVER(dir);
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	struct nfs4_label l, *label = NULL;
 	int err;
 
@@ -4826,7 +4880,9 @@ static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
 
 static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = nfs4_handle_exception(server,
@@ -4857,7 +4913,9 @@ static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
 
 static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	unsigned long now = jiffies;
 	int err;
 
@@ -4919,7 +4977,9 @@ static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle
 static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
 		struct nfs_pathconf *pathconf)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 
 	do {
@@ -5488,7 +5548,9 @@ out_free:
 
 static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	ssize_t ret;
 	do {
 		ret = __nfs4_get_acl_uncached(inode, buf, buflen);
@@ -5622,7 +5684,9 @@ static int _nfs4_get_security_label(struct inode *inode, void *buf,
 static int nfs4_get_security_label(struct inode *inode, void *buf,
 					size_t buflen)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 
 	if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
@@ -5963,7 +6027,7 @@ out:
 /**
  * nfs4_proc_setclientid_confirm - Confirm client ID
  * @clp: state data structure
- * @res: result of a previous SETCLIENTID
+ * @arg: result of a previous SETCLIENTID
  * @cred: credential to use for this call
  *
  * Returns zero, a negative errno, or a negative NFS4ERR status code.
@@ -6263,7 +6327,9 @@ out:
 
 static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 
 	do {
@@ -6302,7 +6368,6 @@ static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
 	p->arg.seqid = seqid;
 	p->res.seqid = seqid;
 	p->lsp = lsp;
-	refcount_inc(&lsp->ls_count);
 	/* Ensure we don't close file until we're done freeing locks! */
 	p->ctx = get_nfs_open_context(ctx);
 	p->l_ctx = nfs_get_lock_context(ctx);
@@ -6527,7 +6592,6 @@ static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
 	p->res.lock_seqid = p->arg.lock_seqid;
 	p->lsp = lsp;
 	p->server = server;
-	refcount_inc(&lsp->ls_count);
 	p->ctx = get_nfs_open_context(ctx);
 	locks_init_lock(&p->fl);
 	locks_copy_lock(&p->fl, fl);
@@ -6829,6 +6893,7 @@ static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *
 	struct nfs4_exception exception = {
 		.state = state,
 		.inode = state->inode,
+		.interruptible = true,
 	};
 	int err;
 
@@ -6869,7 +6934,6 @@ struct nfs4_lock_waiter {
 	struct task_struct	*task;
 	struct inode		*inode;
 	struct nfs_lowner	*owner;
-	bool			notified;
 };
 
 static int
@@ -6891,13 +6955,13 @@ nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, vo
 		/* Make sure it's for the right inode */
 		if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
 			return 0;
-
-		waiter->notified = true;
 	}
 
 	/* override "private" so we can use default_wake_function */
 	wait->private = waiter->task;
-	ret = autoremove_wake_function(wait, mode, flags, key);
+	ret = woken_wake_function(wait, mode, flags, key);
+	if (ret)
+		list_del_init(&wait->entry);
 	wait->private = waiter;
 	return ret;
 }
@@ -6906,7 +6970,6 @@ static int
 nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
 {
 	int status = -ERESTARTSYS;
-	unsigned long flags;
 	struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
 	struct nfs_server *server = NFS_SERVER(state->inode);
 	struct nfs_client *clp = server->nfs_client;
@@ -6916,8 +6979,7 @@ nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
 				    .s_dev = server->s_dev };
 	struct nfs4_lock_waiter waiter = { .task  = current,
 					   .inode = state->inode,
-					   .owner = &owner,
-					   .notified = false };
+					   .owner = &owner};
 	wait_queue_entry_t wait;
 
 	/* Don't bother with waitqueue if we don't expect a callback */
@@ -6927,27 +6989,22 @@ nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
 	init_wait(&wait);
 	wait.private = &waiter;
 	wait.func = nfs4_wake_lock_waiter;
-	add_wait_queue(q, &wait);
 
 	while(!signalled()) {
-		waiter.notified = false;
+		add_wait_queue(q, &wait);
 		status = nfs4_proc_setlk(state, cmd, request);
-		if ((status != -EAGAIN) || IS_SETLK(cmd))
+		if ((status != -EAGAIN) || IS_SETLK(cmd)) {
+			finish_wait(q, &wait);
 			break;
-
-		status = -ERESTARTSYS;
-		spin_lock_irqsave(&q->lock, flags);
-		if (waiter.notified) {
-			spin_unlock_irqrestore(&q->lock, flags);
-			continue;
 		}
-		set_current_state(TASK_INTERRUPTIBLE);
-		spin_unlock_irqrestore(&q->lock, flags);
 
-		freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT);
+		status = -ERESTARTSYS;
+		freezer_do_not_count();
+		wait_woken(&wait, TASK_INTERRUPTIBLE, NFS4_LOCK_MAXTIMEOUT);
+		freezer_count();
+		finish_wait(q, &wait);
 	}
 
-	finish_wait(q, &wait);
 	return status;
 }
 #else /* !CONFIG_NFS_V4_1 */
@@ -7242,7 +7299,9 @@ int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
 			   struct nfs4_fs_locations *fs_locations,
 			   struct page *page)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = _nfs4_proc_fs_locations(client, dir, name,
@@ -7385,7 +7444,9 @@ int nfs4_proc_get_locations(struct inode *inode,
 	struct nfs_client *clp = server->nfs_client;
 	const struct nfs4_mig_recovery_ops *ops =
 					clp->cl_mvops->mig_recovery_ops;
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int status;
 
 	dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
@@ -7509,7 +7570,9 @@ int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
 	struct nfs_client *clp = server->nfs_client;
 	const struct nfs4_mig_recovery_ops *ops =
 					clp->cl_mvops->mig_recovery_ops;
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int status;
 
 	dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
@@ -7527,7 +7590,7 @@ int nfs4_proc_fsid_present(struct inode *inode, const struct cred *cred)
 	return status;
 }
 
-/**
+/*
  * If 'use_integrity' is true and the state managment nfs_client
  * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
  * and the machine credential as per RFC3530bis and RFC5661 Security
@@ -7575,7 +7638,9 @@ static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct
 int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
 		      struct nfs4_secinfo_flavors *flavors)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = -NFS4ERR_WRONGSEC;
@@ -8937,10 +9002,12 @@ nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout)
 	if (status != 0)
 		goto out;
 
-	/* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
-	if (task->tk_status < 0 || lgp->res.layoutp->len == 0) {
+	if (task->tk_status < 0) {
 		status = nfs4_layoutget_handle_exception(task, lgp, &exception);
 		*timeout = exception.timeout;
+	} else if (lgp->res.layoutp->len == 0) {
+		status = -EAGAIN;
+		*timeout = nfs4_update_delay(&exception.timeout);
 	} else
 		lseg = pnfs_layout_process(lgp);
 out:
@@ -9219,7 +9286,7 @@ nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
 	return status;
 }
 
-/**
+/*
  * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
  * possible) as per RFC3530bis and RFC5661 Security Considerations sections
  */
@@ -9263,7 +9330,9 @@ static int
 nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
 			   struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		/* first try using integrity protection */
@@ -9430,7 +9499,9 @@ static int nfs41_test_stateid(struct nfs_server *server,
 		nfs4_stateid *stateid,
 		const struct cred *cred)
 {
-	struct nfs4_exception exception = { };
+	struct nfs4_exception exception = {
+		.interruptible = true,
+	};
 	int err;
 	do {
 		err = _nfs41_test_stateid(server, stateid, cred);
@@ -9484,7 +9555,7 @@ static const struct rpc_call_ops nfs41_free_stateid_ops = {
  * @server: server / transport on which to perform the operation
  * @stateid: state ID to release
  * @cred: credential
- * @is_recovery: set to true if this call needs to be privileged
+ * @privileged: set to true if this call needs to be privileged
  *
  * Note: this function is always asynchronous.
  */
@@ -9691,7 +9762,8 @@ static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
 		| NFS_CAP_DEALLOCATE
 		| NFS_CAP_SEEK
 		| NFS_CAP_LAYOUTSTATS
-		| NFS_CAP_CLONE,
+		| NFS_CAP_CLONE
+		| NFS_CAP_LAYOUTERROR,
 	.init_client = nfs41_init_client,
 	.shutdown_client = nfs41_shutdown_client,
 	.match_stateid = nfs41_match_stateid,
diff --git a/fs/nfs/nfs4session.c b/fs/nfs/nfs4session.c
index a5489d70a724..4145a0138907 100644
--- a/fs/nfs/nfs4session.c
+++ b/fs/nfs/nfs4session.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/nfs/nfs4session.c
  *
@@ -55,7 +56,7 @@ static void nfs4_shrink_slot_table(struct nfs4_slot_table  *tbl, u32 newsize)
 
 /**
  * nfs4_slot_tbl_drain_complete - wake waiters when drain is complete
- * @tbl - controlling slot table
+ * @tbl: controlling slot table
  *
  */
 void nfs4_slot_tbl_drain_complete(struct nfs4_slot_table *tbl)
@@ -110,6 +111,8 @@ static struct nfs4_slot *nfs4_new_slot(struct nfs4_slot_table  *tbl,
 		slot->table = tbl;
 		slot->slot_nr = slotid;
 		slot->seq_nr = seq_init;
+		slot->seq_nr_highest_sent = seq_init;
+		slot->seq_nr_last_acked = seq_init - 1;
 	}
 	return slot;
 }
@@ -276,7 +279,8 @@ static void nfs4_reset_slot_table(struct nfs4_slot_table *tbl,
 	p = &tbl->slots;
 	while (*p) {
 		(*p)->seq_nr = ivalue;
-		(*p)->interrupted = 0;
+		(*p)->seq_nr_highest_sent = ivalue;
+		(*p)->seq_nr_last_acked = ivalue - 1;
 		p = &(*p)->next;
 	}
 	tbl->highest_used_slotid = NFS4_NO_SLOT;
diff --git a/fs/nfs/nfs4session.h b/fs/nfs/nfs4session.h
index 3c550f297561..b996ee23f1ba 100644
--- a/fs/nfs/nfs4session.h
+++ b/fs/nfs/nfs4session.h
@@ -10,7 +10,7 @@
 
 /* maximum number of slots to use */
 #define NFS4_DEF_SLOT_TABLE_SIZE (64U)
-#define NFS4_DEF_CB_SLOT_TABLE_SIZE (1U)
+#define NFS4_DEF_CB_SLOT_TABLE_SIZE (16U)
 #define NFS4_MAX_SLOT_TABLE (1024U)
 #define NFS4_NO_SLOT ((u32)-1)
 
@@ -23,8 +23,9 @@ struct nfs4_slot {
 	unsigned long		generation;
 	u32			slot_nr;
 	u32		 	seq_nr;
-	unsigned int		interrupted : 1,
-				privileged : 1,
+	u32		 	seq_nr_last_acked;
+	u32		 	seq_nr_highest_sent;
+	unsigned int		privileged : 1,
 				seq_done : 1;
 };
 
diff --git a/fs/nfs/nfs4state.c b/fs/nfs/nfs4state.c
index 02488b50534a..e2e3c4f04d3e 100644
--- a/fs/nfs/nfs4state.c
+++ b/fs/nfs/nfs4state.c
@@ -159,6 +159,10 @@ int nfs40_discover_server_trunking(struct nfs_client *clp,
 		/* Sustain the lease, even if it's empty.  If the clientid4
 		 * goes stale it's of no use for trunking discovery. */
 		nfs4_schedule_state_renewal(*result);
+
+		/* If the client state need to recover, do it. */
+		if (clp->cl_state)
+			nfs4_schedule_state_manager(clp);
 	}
 out:
 	return status;
@@ -563,6 +567,7 @@ static void nfs4_gc_state_owners(struct nfs_server *server)
  * nfs4_get_state_owner - Look up a state owner given a credential
  * @server: nfs_server to search
  * @cred: RPC credential to match
+ * @gfp_flags: allocation mode
  *
  * Returns a pointer to an instantiated nfs4_state_owner struct, or NULL.
  */
@@ -2345,8 +2350,7 @@ static void nfs41_handle_recallable_state_revoked(struct nfs_client *clp)
 {
 	/* FIXME: For now, we destroy all layouts. */
 	pnfs_destroy_all_layouts(clp);
-	/* FIXME: For now, we test all delegations+open state+locks. */
-	nfs41_handle_some_state_revoked(clp);
+	nfs_test_expired_all_delegations(clp);
 	dprintk("%s: Recallable state revoked on server %s!\n", __func__,
 			clp->cl_hostname);
 }
diff --git a/fs/nfs/nfs4super.c b/fs/nfs/nfs4super.c
index 6fb7cb6b3f4b..04c57066a11a 100644
--- a/fs/nfs/nfs4super.c
+++ b/fs/nfs/nfs4super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2012 Bryan Schumaker <bjschuma@netapp.com>
  */
@@ -50,7 +51,7 @@ struct file_system_type nfs4_referral_fs_type = {
 
 static const struct super_operations nfs4_sops = {
 	.alloc_inode	= nfs_alloc_inode,
-	.destroy_inode	= nfs_destroy_inode,
+	.free_inode	= nfs_free_inode,
 	.write_inode	= nfs4_write_inode,
 	.drop_inode	= nfs_drop_inode,
 	.statfs		= nfs_statfs,
diff --git a/fs/nfs/nfs4trace.h b/fs/nfs/nfs4trace.h
index b4557cf685fb..cd1a5c08da9a 100644
--- a/fs/nfs/nfs4trace.h
+++ b/fs/nfs/nfs4trace.h
@@ -524,6 +524,31 @@ TRACE_EVENT(nfs4_setup_sequence,
 		)
 );
 
+TRACE_EVENT(nfs4_xdr_status,
+		TP_PROTO(
+			u32 op,
+			int error
+		),
+
+		TP_ARGS(op, error),
+
+		TP_STRUCT__entry(
+			__field(u32, op)
+			__field(int, error)
+		),
+
+		TP_fast_assign(
+			__entry->op = op;
+			__entry->error = -error;
+		),
+
+		TP_printk(
+			"operation %d: nfs status %d (%s)",
+			__entry->op,
+			__entry->error, show_nfsv4_errors(__entry->error)
+		)
+);
+
 DECLARE_EVENT_CLASS(nfs4_open_event,
 		TP_PROTO(
 			const struct nfs_open_context *ctx,
diff --git a/fs/nfs/nfs4xdr.c b/fs/nfs/nfs4xdr.c
index 2fc8f6fa25e4..602446158bfb 100644
--- a/fs/nfs/nfs4xdr.c
+++ b/fs/nfs/nfs4xdr.c
@@ -54,6 +54,7 @@
 #include <linux/nfs_fs.h>
 
 #include "nfs4_fs.h"
+#include "nfs4trace.h"
 #include "internal.h"
 #include "nfs4idmap.h"
 #include "nfs4session.h"
@@ -214,14 +215,14 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
 				 nfs4_fattr_bitmap_maxsz)
 #define encode_read_maxsz	(op_encode_hdr_maxsz + \
 				 encode_stateid_maxsz + 3)
-#define decode_read_maxsz	(op_decode_hdr_maxsz + 2)
+#define decode_read_maxsz	(op_decode_hdr_maxsz + 2 + 1)
 #define encode_readdir_maxsz	(op_encode_hdr_maxsz + \
 				 2 + encode_verifier_maxsz + 5 + \
 				nfs4_label_maxsz)
 #define decode_readdir_maxsz	(op_decode_hdr_maxsz + \
-				 decode_verifier_maxsz)
+				 decode_verifier_maxsz + 1)
 #define encode_readlink_maxsz	(op_encode_hdr_maxsz)
-#define decode_readlink_maxsz	(op_decode_hdr_maxsz + 1)
+#define decode_readlink_maxsz	(op_decode_hdr_maxsz + 1 + 1)
 #define encode_write_maxsz	(op_encode_hdr_maxsz + \
 				 encode_stateid_maxsz + 4)
 #define decode_write_maxsz	(op_decode_hdr_maxsz + \
@@ -283,14 +284,14 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
 #define decode_delegreturn_maxsz (op_decode_hdr_maxsz)
 #define encode_getacl_maxsz	(encode_getattr_maxsz)
 #define decode_getacl_maxsz	(op_decode_hdr_maxsz + \
-				 nfs4_fattr_bitmap_maxsz + 1)
+				 nfs4_fattr_bitmap_maxsz + 1 + 1)
 #define encode_setacl_maxsz	(op_encode_hdr_maxsz + \
 				 encode_stateid_maxsz + 3)
 #define decode_setacl_maxsz	(decode_setattr_maxsz)
 #define encode_fs_locations_maxsz \
 				(encode_getattr_maxsz)
 #define decode_fs_locations_maxsz \
-				(0)
+				(1)
 #define encode_secinfo_maxsz	(op_encode_hdr_maxsz + nfs4_name_maxsz)
 #define decode_secinfo_maxsz	(op_decode_hdr_maxsz + 1 + ((NFS_MAX_SECFLAVORS * (16 + GSS_OID_MAX_LEN)) / 4))
 
@@ -391,12 +392,13 @@ static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
 				1 /* opaque devaddr4 length */ + \
 				  /* devaddr4 payload is read into page */ \
 				1 /* notification bitmap length */ + \
-				1 /* notification bitmap, word 0 */)
+				1 /* notification bitmap, word 0 */ + \
+				1 /* possible XDR padding */)
 #define encode_layoutget_maxsz	(op_encode_hdr_maxsz + 10 + \
 				encode_stateid_maxsz)
 #define decode_layoutget_maxsz	(op_decode_hdr_maxsz + 8 + \
 				decode_stateid_maxsz + \
-				XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE))
+				XDR_QUADLEN(PNFS_LAYOUT_MAXSIZE) + 1)
 #define encode_layoutcommit_maxsz (op_encode_hdr_maxsz +          \
 				2 /* offset */ + \
 				2 /* length */ + \
@@ -1015,12 +1017,11 @@ static void encode_compound_hdr(struct xdr_stream *xdr,
 				struct compound_hdr *hdr)
 {
 	__be32 *p;
-	struct rpc_auth *auth = req->rq_cred->cr_auth;
 
 	/* initialize running count of expected bytes in reply.
 	 * NOTE: the replied tag SHOULD be the same is the one sent,
 	 * but this is not required as a MUST for the server to do so. */
-	hdr->replen = RPC_REPHDRSIZE + auth->au_rslack + 3 + hdr->taglen;
+	hdr->replen = 3 + hdr->taglen;
 
 	WARN_ON_ONCE(hdr->taglen > NFS4_MAXTAGLEN);
 	encode_string(xdr, hdr->taglen, hdr->tag);
@@ -2340,9 +2341,9 @@ static void nfs4_xdr_enc_open(struct rpc_rqst *req, struct xdr_stream *xdr,
 	encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
 	if (args->lg_args) {
 		encode_layoutget(xdr, args->lg_args, &hdr);
-		xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
-				 args->lg_args->layout.pages,
-				 0, args->lg_args->layout.pglen);
+		rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
+					args->lg_args->layout.pglen,
+					hdr.replen);
 	}
 	encode_nops(&hdr);
 }
@@ -2386,9 +2387,9 @@ static void nfs4_xdr_enc_open_noattr(struct rpc_rqst *req,
 	encode_getfattr_open(xdr, args->bitmask, args->open_bitmap, &hdr);
 	if (args->lg_args) {
 		encode_layoutget(xdr, args->lg_args, &hdr);
-		xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
-				 args->lg_args->layout.pages,
-				 0, args->lg_args->layout.pglen);
+		rpc_prepare_reply_pages(req, args->lg_args->layout.pages, 0,
+					args->lg_args->layout.pglen,
+					hdr.replen);
 	}
 	encode_nops(&hdr);
 }
@@ -2498,8 +2499,8 @@ static void nfs4_xdr_enc_readlink(struct rpc_rqst *req, struct xdr_stream *xdr,
 	encode_putfh(xdr, args->fh, &hdr);
 	encode_readlink(xdr, args, req, &hdr);
 
-	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
-			args->pgbase, args->pglen);
+	rpc_prepare_reply_pages(req, args->pages, args->pgbase,
+				args->pglen, hdr.replen);
 	encode_nops(&hdr);
 }
 
@@ -2519,11 +2520,8 @@ static void nfs4_xdr_enc_readdir(struct rpc_rqst *req, struct xdr_stream *xdr,
 	encode_putfh(xdr, args->fh, &hdr);
 	encode_readdir(xdr, args, req, &hdr);
 
-	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2, args->pages,
-			 args->pgbase, args->count);
-	dprintk("%s: inlined page args = (%u, %p, %u, %u)\n",
-			__func__, hdr.replen << 2, args->pages,
-			args->pgbase, args->count);
+	rpc_prepare_reply_pages(req, args->pages, args->pgbase,
+				args->count, hdr.replen);
 	encode_nops(&hdr);
 }
 
@@ -2543,8 +2541,8 @@ static void nfs4_xdr_enc_read(struct rpc_rqst *req, struct xdr_stream *xdr,
 	encode_putfh(xdr, args->fh, &hdr);
 	encode_read(xdr, args, &hdr);
 
-	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
-			 args->pages, args->pgbase, args->count);
+	rpc_prepare_reply_pages(req, args->pages, args->pgbase,
+				args->count, hdr.replen);
 	req->rq_rcv_buf.flags |= XDRBUF_READ;
 	encode_nops(&hdr);
 }
@@ -2590,9 +2588,8 @@ static void nfs4_xdr_enc_getacl(struct rpc_rqst *req, struct xdr_stream *xdr,
 	encode_getattr(xdr, nfs4_acl_bitmap, NULL,
 			ARRAY_SIZE(nfs4_acl_bitmap), &hdr);
 
-	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
-		args->acl_pages, 0, args->acl_len);
-
+	rpc_prepare_reply_pages(req, args->acl_pages, 0,
+				args->acl_len, replen + 1);
 	encode_nops(&hdr);
 }
 
@@ -2813,9 +2810,8 @@ static void nfs4_xdr_enc_fs_locations(struct rpc_rqst *req,
 		encode_fs_locations(xdr, args->bitmask, &hdr);
 	}
 
-	/* Set up reply kvec to capture returned fs_locations array. */
-	xdr_inline_pages(&req->rq_rcv_buf, replen << 2,
-			 (struct page **)&args->page, 0, PAGE_SIZE);
+	rpc_prepare_reply_pages(req, (struct page **)&args->page, 0,
+				PAGE_SIZE, replen + 1);
 	encode_nops(&hdr);
 }
 
@@ -3017,10 +3013,8 @@ static void nfs4_xdr_enc_getdeviceinfo(struct rpc_rqst *req,
 
 	/* set up reply kvec. Subtract notification bitmap max size (2)
 	 * so that notification bitmap is put in xdr_buf tail */
-	xdr_inline_pages(&req->rq_rcv_buf, (hdr.replen - 2) << 2,
-			 args->pdev->pages, args->pdev->pgbase,
-			 args->pdev->pglen);
-
+	rpc_prepare_reply_pages(req, args->pdev->pages, args->pdev->pgbase,
+				args->pdev->pglen, hdr.replen - 2);
 	encode_nops(&hdr);
 }
 
@@ -3041,9 +3035,8 @@ static void nfs4_xdr_enc_layoutget(struct rpc_rqst *req,
 	encode_putfh(xdr, NFS_FH(args->inode), &hdr);
 	encode_layoutget(xdr, args, &hdr);
 
-	xdr_inline_pages(&req->rq_rcv_buf, hdr.replen << 2,
-	    args->layout.pages, 0, args->layout.pglen);
-
+	rpc_prepare_reply_pages(req, args->layout.pages, 0,
+				args->layout.pglen, hdr.replen);
 	encode_nops(&hdr);
 }
 
@@ -3144,22 +3137,12 @@ static void nfs4_xdr_enc_free_stateid(struct rpc_rqst *req,
 }
 #endif /* CONFIG_NFS_V4_1 */
 
-static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
-{
-	dprintk("nfs: %s: prematurely hit end of receive buffer. "
-		"Remaining buffer length is %tu words.\n",
-		func, xdr->end - xdr->p);
-}
-
 static int decode_opaque_inline(struct xdr_stream *xdr, unsigned int *len, char **string)
 {
 	ssize_t ret = xdr_stream_decode_opaque_inline(xdr, (void **)string,
 			NFS4_OPAQUE_LIMIT);
-	if (unlikely(ret < 0)) {
-		if (ret == -EBADMSG)
-			print_overflow_msg(__func__, xdr);
+	if (unlikely(ret < 0))
 		return -EIO;
-	}
 	*len = ret;
 	return 0;
 }
@@ -3170,22 +3153,19 @@ static int decode_compound_hdr(struct xdr_stream *xdr, struct compound_hdr *hdr)
 
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	hdr->status = be32_to_cpup(p++);
 	hdr->taglen = be32_to_cpup(p);
 
 	p = xdr_inline_decode(xdr, hdr->taglen + 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	hdr->tag = (char *)p;
 	p += XDR_QUADLEN(hdr->taglen);
 	hdr->nops = be32_to_cpup(p);
 	if (unlikely(hdr->nops < 1))
 		return nfs4_stat_to_errno(hdr->status);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
@@ -3201,11 +3181,14 @@ static bool __decode_op_hdr(struct xdr_stream *xdr, enum nfs_opnum4 expected,
 	opnum = be32_to_cpup(p++);
 	if (unlikely(opnum != expected))
 		goto out_bad_operation;
+	if (unlikely(*p != cpu_to_be32(NFS_OK)))
+		goto out_status;
+	*nfs_retval = 0;
+	return true;
+out_status:
 	nfserr = be32_to_cpup(p);
-	if (nfserr == NFS_OK)
-		*nfs_retval = 0;
-	else
-		*nfs_retval = nfs4_stat_to_errno(nfserr);
+	trace_nfs4_xdr_status(opnum, nfserr);
+	*nfs_retval = nfs4_stat_to_errno(nfserr);
 	return true;
 out_bad_operation:
 	dprintk("nfs: Server returned operation"
@@ -3214,7 +3197,6 @@ out_bad_operation:
 	*nfs_retval = -EREMOTEIO;
 	return false;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	*nfs_retval = -EIO;
 	return false;
 }
@@ -3235,10 +3217,9 @@ static int decode_ace(struct xdr_stream *xdr, void *ace)
 	char *str;
 
 	p = xdr_inline_decode(xdr, 12);
-	if (likely(p))
-		return decode_opaque_inline(xdr, &strlen, &str);
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
+	if (unlikely(!p))
+		return -EIO;
+	return decode_opaque_inline(xdr, &strlen, &str);
 }
 
 static ssize_t
@@ -3249,10 +3230,9 @@ decode_bitmap4(struct xdr_stream *xdr, uint32_t *bitmap, size_t sz)
 	ret = xdr_stream_decode_uint32_array(xdr, bitmap, sz);
 	if (likely(ret >= 0))
 		return ret;
-	if (ret == -EMSGSIZE)
-		return sz;
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
+	if (ret != -EMSGSIZE)
+		return -EIO;
+	return sz;
 }
 
 static int decode_attr_bitmap(struct xdr_stream *xdr, uint32_t *bitmap)
@@ -3268,13 +3248,10 @@ static int decode_attr_length(struct xdr_stream *xdr, uint32_t *attrlen, unsigne
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	*attrlen = be32_to_cpup(p);
 	*savep = xdr_stream_pos(xdr);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_supported(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *bitmask)
@@ -3303,7 +3280,7 @@ static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *
 	if (likely(bitmap[0] & FATTR4_WORD0_TYPE)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		*type = be32_to_cpup(p);
 		if (*type < NF4REG || *type > NF4NAMEDATTR) {
 			dprintk("%s: bad type %d\n", __func__, *type);
@@ -3314,9 +3291,6 @@ static int decode_attr_type(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *
 	}
 	dprintk("%s: type=0%o\n", __func__, nfs_type2fmt[*type]);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
@@ -3330,15 +3304,12 @@ static int decode_attr_fh_expire_type(struct xdr_stream *xdr,
 	if (likely(bitmap[0] & FATTR4_WORD0_FH_EXPIRE_TYPE)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		*type = be32_to_cpup(p);
 		bitmap[0] &= ~FATTR4_WORD0_FH_EXPIRE_TYPE;
 	}
 	dprintk("%s: expire type=0x%x\n", __func__, *type);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *change)
@@ -3352,7 +3323,7 @@ static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t
 	if (likely(bitmap[0] & FATTR4_WORD0_CHANGE)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, change);
 		bitmap[0] &= ~FATTR4_WORD0_CHANGE;
 		ret = NFS_ATTR_FATTR_CHANGE;
@@ -3360,9 +3331,6 @@ static int decode_attr_change(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t
 	dprintk("%s: change attribute=%Lu\n", __func__,
 			(unsigned long long)*change);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *size)
@@ -3376,16 +3344,13 @@ static int decode_attr_size(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *
 	if (likely(bitmap[0] & FATTR4_WORD0_SIZE)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, size);
 		bitmap[0] &= ~FATTR4_WORD0_SIZE;
 		ret = NFS_ATTR_FATTR_SIZE;
 	}
 	dprintk("%s: file size=%Lu\n", __func__, (unsigned long long)*size);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
@@ -3398,15 +3363,12 @@ static int decode_attr_link_support(struct xdr_stream *xdr, uint32_t *bitmap, ui
 	if (likely(bitmap[0] & FATTR4_WORD0_LINK_SUPPORT)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		*res = be32_to_cpup(p);
 		bitmap[0] &= ~FATTR4_WORD0_LINK_SUPPORT;
 	}
 	dprintk("%s: link support=%s\n", __func__, *res == 0 ? "false" : "true");
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
@@ -3419,15 +3381,12 @@ static int decode_attr_symlink_support(struct xdr_stream *xdr, uint32_t *bitmap,
 	if (likely(bitmap[0] & FATTR4_WORD0_SYMLINK_SUPPORT)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		*res = be32_to_cpup(p);
 		bitmap[0] &= ~FATTR4_WORD0_SYMLINK_SUPPORT;
 	}
 	dprintk("%s: symlink support=%s\n", __func__, *res == 0 ? "false" : "true");
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs_fsid *fsid)
@@ -3442,7 +3401,7 @@ static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs
 	if (likely(bitmap[0] & FATTR4_WORD0_FSID)) {
 		p = xdr_inline_decode(xdr, 16);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		p = xdr_decode_hyper(p, &fsid->major);
 		xdr_decode_hyper(p, &fsid->minor);
 		bitmap[0] &= ~FATTR4_WORD0_FSID;
@@ -3452,9 +3411,6 @@ static int decode_attr_fsid(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs
 			(unsigned long long)fsid->major,
 			(unsigned long long)fsid->minor);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
@@ -3467,15 +3423,12 @@ static int decode_attr_lease_time(struct xdr_stream *xdr, uint32_t *bitmap, uint
 	if (likely(bitmap[0] & FATTR4_WORD0_LEASE_TIME)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		*res = be32_to_cpup(p);
 		bitmap[0] &= ~FATTR4_WORD0_LEASE_TIME;
 	}
 	dprintk("%s: file size=%u\n", __func__, (unsigned int)*res);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *res)
@@ -3487,14 +3440,11 @@ static int decode_attr_error(struct xdr_stream *xdr, uint32_t *bitmap, int32_t *
 	if (likely(bitmap[0] & FATTR4_WORD0_RDATTR_ERROR)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		bitmap[0] &= ~FATTR4_WORD0_RDATTR_ERROR;
 		*res = -be32_to_cpup(p);
 	}
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_exclcreat_supported(struct xdr_stream *xdr,
@@ -3526,13 +3476,13 @@ static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, stru
 	if (likely(bitmap[0] & FATTR4_WORD0_FILEHANDLE)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		len = be32_to_cpup(p);
 		if (len > NFS4_FHSIZE)
 			return -EIO;
 		p = xdr_inline_decode(xdr, len);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		if (fh != NULL) {
 			memcpy(fh->data, p, len);
 			fh->size = len;
@@ -3540,9 +3490,6 @@ static int decode_attr_filehandle(struct xdr_stream *xdr, uint32_t *bitmap, stru
 		bitmap[0] &= ~FATTR4_WORD0_FILEHANDLE;
 	}
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
@@ -3555,15 +3502,12 @@ static int decode_attr_aclsupport(struct xdr_stream *xdr, uint32_t *bitmap, uint
 	if (likely(bitmap[0] & FATTR4_WORD0_ACLSUPPORT)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		*res = be32_to_cpup(p);
 		bitmap[0] &= ~FATTR4_WORD0_ACLSUPPORT;
 	}
 	dprintk("%s: ACLs supported=%u\n", __func__, (unsigned int)*res);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
@@ -3577,16 +3521,13 @@ static int decode_attr_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t
 	if (likely(bitmap[0] & FATTR4_WORD0_FILEID)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, fileid);
 		bitmap[0] &= ~FATTR4_WORD0_FILEID;
 		ret = NFS_ATTR_FATTR_FILEID;
 	}
 	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *fileid)
@@ -3600,16 +3541,13 @@ static int decode_attr_mounted_on_fileid(struct xdr_stream *xdr, uint32_t *bitma
 	if (likely(bitmap[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, fileid);
 		bitmap[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
 		ret = NFS_ATTR_FATTR_MOUNTED_ON_FILEID;
 	}
 	dprintk("%s: fileid=%Lu\n", __func__, (unsigned long long)*fileid);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
@@ -3623,15 +3561,12 @@ static int decode_attr_files_avail(struct xdr_stream *xdr, uint32_t *bitmap, uin
 	if (likely(bitmap[0] & FATTR4_WORD0_FILES_AVAIL)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, res);
 		bitmap[0] &= ~FATTR4_WORD0_FILES_AVAIL;
 	}
 	dprintk("%s: files avail=%Lu\n", __func__, (unsigned long long)*res);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
@@ -3645,15 +3580,12 @@ static int decode_attr_files_free(struct xdr_stream *xdr, uint32_t *bitmap, uint
 	if (likely(bitmap[0] & FATTR4_WORD0_FILES_FREE)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, res);
 		bitmap[0] &= ~FATTR4_WORD0_FILES_FREE;
 	}
 	dprintk("%s: files free=%Lu\n", __func__, (unsigned long long)*res);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
@@ -3667,15 +3599,12 @@ static int decode_attr_files_total(struct xdr_stream *xdr, uint32_t *bitmap, uin
 	if (likely(bitmap[0] & FATTR4_WORD0_FILES_TOTAL)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, res);
 		bitmap[0] &= ~FATTR4_WORD0_FILES_TOTAL;
 	}
 	dprintk("%s: files total=%Lu\n", __func__, (unsigned long long)*res);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
@@ -3686,7 +3615,7 @@ static int decode_pathname(struct xdr_stream *xdr, struct nfs4_pathname *path)
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	n = be32_to_cpup(p);
 	if (n == 0)
 		goto root_path;
@@ -3718,9 +3647,6 @@ out_eio:
 	dprintk(" status %d", status);
 	status = -EIO;
 	goto out;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, struct nfs4_fs_locations *res)
@@ -3745,7 +3671,7 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st
 		goto out;
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		goto out_eio;
 	n = be32_to_cpup(p);
 	if (n <= 0)
 		goto out_eio;
@@ -3758,7 +3684,7 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st
 		loc = &res->locations[res->nlocations];
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			goto out_eio;
 		m = be32_to_cpup(p);
 
 		dprintk("%s: servers:\n", __func__);
@@ -3796,8 +3722,6 @@ static int decode_attr_fs_locations(struct xdr_stream *xdr, uint32_t *bitmap, st
 out:
 	dprintk("%s: fs_locations done, error = %d\n", __func__, status);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
 out_eio:
 	status = -EIO;
 	goto out;
@@ -3814,15 +3738,12 @@ static int decode_attr_maxfilesize(struct xdr_stream *xdr, uint32_t *bitmap, uin
 	if (likely(bitmap[0] & FATTR4_WORD0_MAXFILESIZE)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, res);
 		bitmap[0] &= ~FATTR4_WORD0_MAXFILESIZE;
 	}
 	dprintk("%s: maxfilesize=%Lu\n", __func__, (unsigned long long)*res);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxlink)
@@ -3836,15 +3757,12 @@ static int decode_attr_maxlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_
 	if (likely(bitmap[0] & FATTR4_WORD0_MAXLINK)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		*maxlink = be32_to_cpup(p);
 		bitmap[0] &= ~FATTR4_WORD0_MAXLINK;
 	}
 	dprintk("%s: maxlink=%u\n", __func__, *maxlink);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *maxname)
@@ -3858,15 +3776,12 @@ static int decode_attr_maxname(struct xdr_stream *xdr, uint32_t *bitmap, uint32_
 	if (likely(bitmap[0] & FATTR4_WORD0_MAXNAME)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		*maxname = be32_to_cpup(p);
 		bitmap[0] &= ~FATTR4_WORD0_MAXNAME;
 	}
 	dprintk("%s: maxname=%u\n", __func__, *maxname);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
@@ -3881,7 +3796,7 @@ static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_
 		uint64_t maxread;
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, &maxread);
 		if (maxread > 0x7FFFFFFF)
 			maxread = 0x7FFFFFFF;
@@ -3890,9 +3805,6 @@ static int decode_attr_maxread(struct xdr_stream *xdr, uint32_t *bitmap, uint32_
 	}
 	dprintk("%s: maxread=%lu\n", __func__, (unsigned long)*res);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *res)
@@ -3907,7 +3819,7 @@ static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32
 		uint64_t maxwrite;
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, &maxwrite);
 		if (maxwrite > 0x7FFFFFFF)
 			maxwrite = 0x7FFFFFFF;
@@ -3916,9 +3828,6 @@ static int decode_attr_maxwrite(struct xdr_stream *xdr, uint32_t *bitmap, uint32
 	}
 	dprintk("%s: maxwrite=%lu\n", __func__, (unsigned long)*res);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *mode)
@@ -3933,7 +3842,7 @@ static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *m
 	if (likely(bitmap[1] & FATTR4_WORD1_MODE)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		tmp = be32_to_cpup(p);
 		*mode = tmp & ~S_IFMT;
 		bitmap[1] &= ~FATTR4_WORD1_MODE;
@@ -3941,9 +3850,6 @@ static int decode_attr_mode(struct xdr_stream *xdr, uint32_t *bitmap, umode_t *m
 	}
 	dprintk("%s: file mode=0%o\n", __func__, (unsigned int)*mode);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t *nlink)
@@ -3957,16 +3863,13 @@ static int decode_attr_nlink(struct xdr_stream *xdr, uint32_t *bitmap, uint32_t
 	if (likely(bitmap[1] & FATTR4_WORD1_NUMLINKS)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		*nlink = be32_to_cpup(p);
 		bitmap[1] &= ~FATTR4_WORD1_NUMLINKS;
 		ret = NFS_ATTR_FATTR_NLINK;
 	}
 	dprintk("%s: nlink=%u\n", __func__, (unsigned int)*nlink);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static ssize_t decode_nfs4_string(struct xdr_stream *xdr,
@@ -4011,10 +3914,9 @@ static int decode_attr_owner(struct xdr_stream *xdr, uint32_t *bitmap,
 		return NFS_ATTR_FATTR_OWNER;
 	}
 out:
-	if (len != -EBADMSG)
-		return 0;
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
+	if (len == -EBADMSG)
+		return -EIO;
+	return 0;
 }
 
 static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
@@ -4046,10 +3948,9 @@ static int decode_attr_group(struct xdr_stream *xdr, uint32_t *bitmap,
 		return NFS_ATTR_FATTR_GROUP;
 	}
 out:
-	if (len != -EBADMSG)
-		return 0;
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
+	if (len == -EBADMSG)
+		return -EIO;
+	return 0;
 }
 
 static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rdev)
@@ -4066,7 +3967,7 @@ static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rde
 
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		major = be32_to_cpup(p++);
 		minor = be32_to_cpup(p);
 		tmp = MKDEV(major, minor);
@@ -4077,9 +3978,6 @@ static int decode_attr_rdev(struct xdr_stream *xdr, uint32_t *bitmap, dev_t *rde
 	}
 	dprintk("%s: rdev=(0x%x:0x%x)\n", __func__, major, minor);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
@@ -4093,15 +3991,12 @@ static int decode_attr_space_avail(struct xdr_stream *xdr, uint32_t *bitmap, uin
 	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_AVAIL)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, res);
 		bitmap[1] &= ~FATTR4_WORD1_SPACE_AVAIL;
 	}
 	dprintk("%s: space avail=%Lu\n", __func__, (unsigned long long)*res);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
@@ -4115,15 +4010,12 @@ static int decode_attr_space_free(struct xdr_stream *xdr, uint32_t *bitmap, uint
 	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_FREE)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, res);
 		bitmap[1] &= ~FATTR4_WORD1_SPACE_FREE;
 	}
 	dprintk("%s: space free=%Lu\n", __func__, (unsigned long long)*res);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *res)
@@ -4137,15 +4029,12 @@ static int decode_attr_space_total(struct xdr_stream *xdr, uint32_t *bitmap, uin
 	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_TOTAL)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, res);
 		bitmap[1] &= ~FATTR4_WORD1_SPACE_TOTAL;
 	}
 	dprintk("%s: space total=%Lu\n", __func__, (unsigned long long)*res);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint64_t *used)
@@ -4159,7 +4048,7 @@ static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint
 	if (likely(bitmap[1] & FATTR4_WORD1_SPACE_USED)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, used);
 		bitmap[1] &= ~FATTR4_WORD1_SPACE_USED;
 		ret = NFS_ATTR_FATTR_SPACE_USED;
@@ -4167,9 +4056,6 @@ static int decode_attr_space_used(struct xdr_stream *xdr, uint32_t *bitmap, uint
 	dprintk("%s: space used=%Lu\n", __func__,
 			(unsigned long long)*used);
 	return ret;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static __be32 *
@@ -4189,12 +4075,9 @@ static int decode_attr_time(struct xdr_stream *xdr, struct timespec *time)
 
 	p = xdr_inline_decode(xdr, nfstime4_maxsz << 2);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	xdr_decode_nfstime4(p, time);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_time_access(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
@@ -4265,19 +4148,19 @@ static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
 	if (likely(bitmap[2] & FATTR4_WORD2_SECURITY_LABEL)) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		lfs = be32_to_cpup(p++);
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		pi = be32_to_cpup(p++);
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		len = be32_to_cpup(p++);
 		p = xdr_inline_decode(xdr, len);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		if (len < NFS4_MAXLABELLEN) {
 			if (label) {
 				memcpy(label->label, p, len);
@@ -4295,10 +4178,6 @@ static int decode_attr_security_label(struct xdr_stream *xdr, uint32_t *bitmap,
 		dprintk("%s: label=%s, len=%d, PI=%d, LFS=%d\n", __func__,
 			(char *)label->label, label->len, label->pi, label->lfs);
 	return status;
-
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_attr_time_modify(struct xdr_stream *xdr, uint32_t *bitmap, struct timespec *time)
@@ -4342,14 +4221,11 @@ static int decode_change_info(struct xdr_stream *xdr, struct nfs4_change_info *c
 
 	p = xdr_inline_decode(xdr, 20);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	cinfo->atomic = be32_to_cpup(p++);
 	p = xdr_decode_hyper(p, &cinfo->before);
 	xdr_decode_hyper(p, &cinfo->after);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
@@ -4363,24 +4239,19 @@ static int decode_access(struct xdr_stream *xdr, u32 *supported, u32 *access)
 		return status;
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	supp = be32_to_cpup(p++);
 	acc = be32_to_cpup(p);
 	*supported = supp;
 	*access = acc;
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_opaque_fixed(struct xdr_stream *xdr, void *buf, size_t len)
 {
 	ssize_t ret = xdr_stream_decode_opaque_fixed(xdr, buf, len);
-	if (unlikely(ret < 0)) {
-		print_overflow_msg(__func__, xdr);
+	if (unlikely(ret < 0))
 		return -EIO;
-	}
 	return 0;
 }
 
@@ -4460,13 +4331,11 @@ static int decode_create(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
 		return status;
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	bmlen = be32_to_cpup(p);
 	p = xdr_inline_decode(xdr, bmlen << 2);
 	if (likely(p))
 		return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 }
 
@@ -4574,13 +4443,10 @@ static int decode_threshold_hint(struct xdr_stream *xdr,
 	if (likely(bitmap[0] & hint_bit)) {
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		xdr_decode_hyper(p, res);
 	}
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_first_threshold_item4(struct xdr_stream *xdr,
@@ -4593,10 +4459,8 @@ static int decode_first_threshold_item4(struct xdr_stream *xdr,
 
 	/* layout type */
 	p = xdr_inline_decode(xdr, 4);
-	if (unlikely(!p)) {
-		print_overflow_msg(__func__, xdr);
+	if (unlikely(!p))
 		return -EIO;
-	}
 	res->l_type = be32_to_cpup(p);
 
 	/* thi_hintset bitmap */
@@ -4654,7 +4518,7 @@ static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
 			return -EREMOTEIO;
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		num = be32_to_cpup(p);
 		if (num == 0)
 			return 0;
@@ -4667,9 +4531,6 @@ static int decode_attr_mdsthreshold(struct xdr_stream *xdr,
 		bitmap[2] &= ~FATTR4_WORD2_MDSTHRESHOLD;
 	}
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_getfattr_attrs(struct xdr_stream *xdr, uint32_t *bitmap,
@@ -4857,7 +4718,7 @@ static int decode_pnfs_layout_types(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	fsinfo->nlayouttypes = be32_to_cpup(p);
 
 	/* pNFS is not supported by the underlying file system */
@@ -4867,7 +4728,7 @@ static int decode_pnfs_layout_types(struct xdr_stream *xdr,
 	/* Decode and set first layout type, move xdr->p past unused types */
 	p = xdr_inline_decode(xdr, fsinfo->nlayouttypes * 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 
 	/* If we get too many, then just cap it at the max */
 	if (fsinfo->nlayouttypes > NFS_MAX_LAYOUT_TYPES) {
@@ -4879,9 +4740,6 @@ static int decode_pnfs_layout_types(struct xdr_stream *xdr,
 	for(i = 0; i < fsinfo->nlayouttypes; ++i)
 		fsinfo->layouttype[i] = be32_to_cpup(p++);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 /*
@@ -4915,10 +4773,8 @@ static int decode_attr_layout_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
 	*res = 0;
 	if (bitmap[2] & FATTR4_WORD2_LAYOUT_BLKSIZE) {
 		p = xdr_inline_decode(xdr, 4);
-		if (unlikely(!p)) {
-			print_overflow_msg(__func__, xdr);
+		if (unlikely(!p))
 			return -EIO;
-		}
 		*res = be32_to_cpup(p);
 		bitmap[2] &= ~FATTR4_WORD2_LAYOUT_BLKSIZE;
 	}
@@ -4937,10 +4793,8 @@ static int decode_attr_clone_blksize(struct xdr_stream *xdr, uint32_t *bitmap,
 	*res = 0;
 	if (bitmap[2] & FATTR4_WORD2_CLONE_BLKSIZE) {
 		p = xdr_inline_decode(xdr, 4);
-		if (unlikely(!p)) {
-			print_overflow_msg(__func__, xdr);
+		if (unlikely(!p))
 			return -EIO;
-		}
 		*res = be32_to_cpup(p);
 		bitmap[2] &= ~FATTR4_WORD2_CLONE_BLKSIZE;
 	}
@@ -5016,19 +4870,16 @@ static int decode_getfh(struct xdr_stream *xdr, struct nfs_fh *fh)
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	len = be32_to_cpup(p);
 	if (len > NFS4_FHSIZE)
 		return -EIO;
 	fh->size = len;
 	p = xdr_inline_decode(xdr, len);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	memcpy(fh->data, p, len);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_link(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
@@ -5052,7 +4903,7 @@ static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
 
 	p = xdr_inline_decode(xdr, 32); /* read 32 bytes */
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	p = xdr_decode_hyper(p, &offset); /* read 2 8-byte long words */
 	p = xdr_decode_hyper(p, &length);
 	type = be32_to_cpup(p++); /* 4 byte read */
@@ -5069,11 +4920,9 @@ static int decode_lock_denied (struct xdr_stream *xdr, struct file_lock *fl)
 	p = xdr_decode_hyper(p, &clientid); /* read 8 bytes */
 	namelen = be32_to_cpup(p); /* read 4 bytes */  /* have read all 32 bytes now */
 	p = xdr_inline_decode(xdr, namelen); /* variable size field */
-	if (likely(p))
-		return -NFS4ERR_DENIED;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
+	if (likely(!p))
+		return -EIO;
+	return -NFS4ERR_DENIED;
 }
 
 static int decode_lock(struct xdr_stream *xdr, struct nfs_lock_res *res)
@@ -5142,7 +4991,7 @@ static int decode_space_limit(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 12);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	limit_type = be32_to_cpup(p++);
 	switch (limit_type) {
 	case NFS4_LIMIT_SIZE:
@@ -5156,9 +5005,6 @@ static int decode_space_limit(struct xdr_stream *xdr,
 	maxsize >>= PAGE_SHIFT;
 	*pagemod_limit = min_t(u64, maxsize, ULONG_MAX);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_rw_delegation(struct xdr_stream *xdr,
@@ -5173,7 +5019,7 @@ static int decode_rw_delegation(struct xdr_stream *xdr,
 		return status;
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	res->do_recall = be32_to_cpup(p);
 
 	switch (delegation_type) {
@@ -5186,9 +5032,6 @@ static int decode_rw_delegation(struct xdr_stream *xdr,
 				return -EIO;
 	}
 	return decode_ace(xdr, NULL);
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
@@ -5198,7 +5041,7 @@ static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	why_no_delegation = be32_to_cpup(p);
 	switch (why_no_delegation) {
 		case WND4_CONTENTION:
@@ -5207,9 +5050,6 @@ static int decode_no_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
 			/* Ignore for now */
 	}
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
@@ -5219,7 +5059,7 @@ static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	delegation_type = be32_to_cpup(p);
 	res->delegation_type = 0;
 	switch (delegation_type) {
@@ -5232,9 +5072,6 @@ static int decode_delegation(struct xdr_stream *xdr, struct nfs_openres *res)
 		return decode_no_delegation(xdr, res);
 	}
 	return -EIO;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
@@ -5256,7 +5093,7 @@ static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
 
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	res->rflags = be32_to_cpup(p++);
 	bmlen = be32_to_cpup(p);
 	if (bmlen > 10)
@@ -5264,7 +5101,7 @@ static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
 
 	p = xdr_inline_decode(xdr, bmlen << 2);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	savewords = min_t(uint32_t, bmlen, NFS4_BITMAP_SIZE);
 	for (i = 0; i < savewords; ++i)
 		res->attrset[i] = be32_to_cpup(p++);
@@ -5275,9 +5112,6 @@ static int decode_open(struct xdr_stream *xdr, struct nfs_openres *res)
 xdr_error:
 	dprintk("%s: Bitmap too large! Length = %u\n", __func__, bmlen);
 	return -EIO;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_open_confirm(struct xdr_stream *xdr, struct nfs_open_confirmres *res)
@@ -5326,7 +5160,7 @@ static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
 		return status;
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	eof = be32_to_cpup(p++);
 	count = be32_to_cpup(p);
 	recvd = xdr_read_pages(xdr, count);
@@ -5339,9 +5173,6 @@ static int decode_read(struct xdr_stream *xdr, struct rpc_rqst *req,
 	res->eof = eof;
 	res->count = count;
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_readdir(struct xdr_stream *xdr, struct rpc_rqst *req, struct nfs4_readdir_res *readdir)
@@ -5374,7 +5205,7 @@ static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
 	/* Convert length of symlink */
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	len = be32_to_cpup(p);
 	if (len >= rcvbuf->page_len || len <= 0) {
 		dprintk("nfs: server returned giant symlink!\n");
@@ -5395,9 +5226,6 @@ static int decode_readlink(struct xdr_stream *xdr, struct rpc_rqst *req)
 	 */
 	xdr_terminate_string(rcvbuf, len);
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_remove(struct xdr_stream *xdr, struct nfs4_change_info *cinfo)
@@ -5500,7 +5328,6 @@ static int decode_setattr(struct xdr_stream *xdr)
 		return status;
 	if (decode_bitmap4(xdr, NULL, 0) >= 0)
 		return 0;
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 }
 
@@ -5512,7 +5339,7 @@ static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_re
 
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	opnum = be32_to_cpup(p++);
 	if (opnum != OP_SETCLIENTID) {
 		dprintk("nfs: decode_setclientid: Server returned operation"
@@ -5523,7 +5350,7 @@ static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_re
 	if (nfserr == NFS_OK) {
 		p = xdr_inline_decode(xdr, 8 + NFS4_VERIFIER_SIZE);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		p = xdr_decode_hyper(p, &res->clientid);
 		memcpy(res->confirm.data, p, NFS4_VERIFIER_SIZE);
 	} else if (nfserr == NFSERR_CLID_INUSE) {
@@ -5532,28 +5359,25 @@ static int decode_setclientid(struct xdr_stream *xdr, struct nfs4_setclientid_re
 		/* skip netid string */
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		len = be32_to_cpup(p);
 		p = xdr_inline_decode(xdr, len);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 
 		/* skip uaddr string */
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		len = be32_to_cpup(p);
 		p = xdr_inline_decode(xdr, len);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		return -NFSERR_CLID_INUSE;
 	} else
 		return nfs4_stat_to_errno(nfserr);
 
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_setclientid_confirm(struct xdr_stream *xdr)
@@ -5572,13 +5396,10 @@ static int decode_write(struct xdr_stream *xdr, struct nfs_pgio_res *res)
 
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	res->count = be32_to_cpup(p++);
 	res->verf->committed = be32_to_cpup(p++);
 	return decode_write_verifier(xdr, &res->verf->verifier);
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_delegreturn(struct xdr_stream *xdr)
@@ -5594,30 +5415,24 @@ static int decode_secinfo_gss(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	oid_len = be32_to_cpup(p);
 	if (oid_len > GSS_OID_MAX_LEN)
-		goto out_err;
+		return -EINVAL;
 
 	p = xdr_inline_decode(xdr, oid_len);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	memcpy(flavor->flavor_info.oid.data, p, oid_len);
 	flavor->flavor_info.oid.len = oid_len;
 
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	flavor->flavor_info.qop = be32_to_cpup(p++);
 	flavor->flavor_info.service = be32_to_cpup(p);
 
 	return 0;
-
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
-out_err:
-	return -EINVAL;
 }
 
 static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
@@ -5629,7 +5444,7 @@ static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 
 	res->flavors->num_flavors = 0;
 	num_flavors = be32_to_cpup(p);
@@ -5641,7 +5456,7 @@ static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res
 
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		sec_flavor->flavor = be32_to_cpup(p);
 
 		if (sec_flavor->flavor == RPC_AUTH_GSS) {
@@ -5655,9 +5470,6 @@ static int decode_secinfo_common(struct xdr_stream *xdr, struct nfs4_secinfo_res
 	status = 0;
 out:
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_secinfo(struct xdr_stream *xdr, struct nfs4_secinfo_res *res)
@@ -5711,11 +5523,11 @@ static int decode_exchange_id(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	xdr_decode_hyper(p, &res->clientid);
 	p = xdr_inline_decode(xdr, 12);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	res->seqid = be32_to_cpup(p++);
 	res->flags = be32_to_cpup(p++);
 
@@ -5739,7 +5551,7 @@ static int decode_exchange_id(struct xdr_stream *xdr,
 	/* server_owner4.so_minor_id */
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	p = xdr_decode_hyper(p, &res->server_owner->minor_id);
 
 	/* server_owner4.so_major_id */
@@ -5759,7 +5571,7 @@ static int decode_exchange_id(struct xdr_stream *xdr,
 	/* Implementation Id */
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	impl_id_count = be32_to_cpup(p++);
 
 	if (impl_id_count) {
@@ -5778,16 +5590,13 @@ static int decode_exchange_id(struct xdr_stream *xdr,
 		/* nii_date */
 		p = xdr_inline_decode(xdr, 12);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 		p = xdr_decode_hyper(p, &res->impl_id->date.seconds);
 		res->impl_id->date.nseconds = be32_to_cpup(p);
 
 		/* if there's more than one entry, ignore the rest */
 	}
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_chan_attrs(struct xdr_stream *xdr,
@@ -5798,7 +5607,7 @@ static int decode_chan_attrs(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 28);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	val = be32_to_cpup(p++);	/* headerpadsz */
 	if (val)
 		return -EINVAL;		/* no support for header padding yet */
@@ -5816,12 +5625,9 @@ static int decode_chan_attrs(struct xdr_stream *xdr,
 	if (nr_attrs == 1) {
 		p = xdr_inline_decode(xdr, 4); /* skip rdma_attrs */
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 	}
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_sessionid(struct xdr_stream *xdr, struct nfs4_sessionid *sid)
@@ -5844,7 +5650,7 @@ static int decode_bind_conn_to_session(struct xdr_stream *xdr,
 	/* dir flags, rdma mode bool */
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 
 	res->dir = be32_to_cpup(p++);
 	if (res->dir == 0 || res->dir > NFS4_CDFS4_BOTH)
@@ -5855,9 +5661,6 @@ static int decode_bind_conn_to_session(struct xdr_stream *xdr,
 		res->use_conn_in_rdma_mode = true;
 
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_create_session(struct xdr_stream *xdr,
@@ -5875,7 +5678,7 @@ static int decode_create_session(struct xdr_stream *xdr,
 	/* seqid, flags */
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	res->seqid = be32_to_cpup(p++);
 	res->flags = be32_to_cpup(p);
 
@@ -5884,9 +5687,6 @@ static int decode_create_session(struct xdr_stream *xdr,
 	if (!status)
 		status = decode_chan_attrs(xdr, &res->bc_attrs);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_destroy_session(struct xdr_stream *xdr, void *dummy)
@@ -5967,7 +5767,6 @@ out_err:
 	res->sr_status = status;
 	return status;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	status = -EIO;
 	goto out_err;
 #else  /* CONFIG_NFS_V4_1 */
@@ -5995,7 +5794,7 @@ static int decode_getdeviceinfo(struct xdr_stream *xdr,
 		if (status == -ETOOSMALL) {
 			p = xdr_inline_decode(xdr, 4);
 			if (unlikely(!p))
-				goto out_overflow;
+				return -EIO;
 			pdev->mincount = be32_to_cpup(p);
 			dprintk("%s: Min count too small. mincnt = %u\n",
 				__func__, pdev->mincount);
@@ -6005,7 +5804,7 @@ static int decode_getdeviceinfo(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 8);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	type = be32_to_cpup(p++);
 	if (type != pdev->layout_type) {
 		dprintk("%s: layout mismatch req: %u pdev: %u\n",
@@ -6019,19 +5818,19 @@ static int decode_getdeviceinfo(struct xdr_stream *xdr,
 	 */
 	pdev->mincount = be32_to_cpup(p);
 	if (xdr_read_pages(xdr, pdev->mincount) != pdev->mincount)
-		goto out_overflow;
+		return -EIO;
 
 	/* Parse notification bitmap, verifying that it is zero. */
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	len = be32_to_cpup(p);
 	if (len) {
 		uint32_t i;
 
 		p = xdr_inline_decode(xdr, 4 * len);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 
 		res->notification = be32_to_cpup(p++);
 		for (i = 1; i < len; i++) {
@@ -6043,9 +5842,6 @@ static int decode_getdeviceinfo(struct xdr_stream *xdr,
 		}
 	}
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_layoutget(struct xdr_stream *xdr, struct rpc_rqst *req,
@@ -6115,7 +5911,6 @@ out:
 	res->status = status;
 	return status;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	status = -EIO;
 	goto out;
 }
@@ -6131,16 +5926,13 @@ static int decode_layoutreturn(struct xdr_stream *xdr,
 		return status;
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	res->lrs_present = be32_to_cpup(p);
 	if (res->lrs_present)
 		status = decode_layout_stateid(xdr, &res->stateid);
 	else
 		nfs4_stateid_copy(&res->stateid, &invalid_stateid);
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_layoutcommit(struct xdr_stream *xdr,
@@ -6158,19 +5950,16 @@ static int decode_layoutcommit(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	sizechanged = be32_to_cpup(p);
 
 	if (sizechanged) {
 		/* throw away new size */
 		p = xdr_inline_decode(xdr, 8);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EIO;
 	}
 	return 0;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EIO;
 }
 
 static int decode_test_stateid(struct xdr_stream *xdr,
@@ -6186,21 +5975,17 @@ static int decode_test_stateid(struct xdr_stream *xdr,
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	num_res = be32_to_cpup(p++);
 	if (num_res != 1)
-		goto out;
+		return -EIO;
 
 	p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EIO;
 	res->status = be32_to_cpup(p++);
 
 	return status;
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-out:
-	return -EIO;
 }
 
 static int decode_free_stateid(struct xdr_stream *xdr,
@@ -7570,11 +7355,11 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 	uint64_t new_cookie;
 	__be32 *p = xdr_inline_decode(xdr, 4);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EAGAIN;
 	if (*p == xdr_zero) {
 		p = xdr_inline_decode(xdr, 4);
 		if (unlikely(!p))
-			goto out_overflow;
+			return -EAGAIN;
 		if (*p == xdr_zero)
 			return -EAGAIN;
 		entry->eof = 1;
@@ -7583,13 +7368,13 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 
 	p = xdr_inline_decode(xdr, 12);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EAGAIN;
 	p = xdr_decode_hyper(p, &new_cookie);
 	entry->len = be32_to_cpup(p);
 
 	p = xdr_inline_decode(xdr, entry->len);
 	if (unlikely(!p))
-		goto out_overflow;
+		return -EAGAIN;
 	entry->name = (const char *) p;
 
 	/*
@@ -7601,14 +7386,14 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 	entry->fattr->valid = 0;
 
 	if (decode_attr_bitmap(xdr, bitmap) < 0)
-		goto out_overflow;
+		return -EAGAIN;
 
 	if (decode_attr_length(xdr, &len, &savep) < 0)
-		goto out_overflow;
+		return -EAGAIN;
 
 	if (decode_getfattr_attrs(xdr, bitmap, entry->fattr, entry->fh,
 			NULL, entry->label, entry->server) < 0)
-		goto out_overflow;
+		return -EAGAIN;
 	if (entry->fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID)
 		entry->ino = entry->fattr->mounted_on_fileid;
 	else if (entry->fattr->valid & NFS_ATTR_FATTR_FILEID)
@@ -7622,10 +7407,6 @@ int nfs4_decode_dirent(struct xdr_stream *xdr, struct nfs_entry *entry,
 	entry->cookie = new_cookie;
 
 	return 0;
-
-out_overflow:
-	print_overflow_msg(__func__, xdr);
-	return -EAGAIN;
 }
 
 /*
@@ -7791,6 +7572,7 @@ const struct rpc_procinfo nfs4_procedures[] = {
 	PROC42(COPY,		enc_copy,		dec_copy),
 	PROC42(OFFLOAD_CANCEL,	enc_offload_cancel,	dec_offload_cancel),
 	PROC(LOOKUPP,		enc_lookupp,		dec_lookupp),
+	PROC42(LAYOUTERROR,	enc_layouterror,	dec_layouterror),
 };
 
 static unsigned int nfs_version4_counts[ARRAY_SIZE(nfs4_procedures)];
diff --git a/fs/nfs/nfstrace.c b/fs/nfs/nfstrace.c
index b60d5fbd7727..a90b363500c2 100644
--- a/fs/nfs/nfstrace.c
+++ b/fs/nfs/nfstrace.c
@@ -11,3 +11,4 @@
 
 EXPORT_TRACEPOINT_SYMBOL_GPL(nfs_fsync_enter);
 EXPORT_TRACEPOINT_SYMBOL_GPL(nfs_fsync_exit);
+EXPORT_TRACEPOINT_SYMBOL_GPL(nfs_xdr_status);
diff --git a/fs/nfs/nfstrace.h b/fs/nfs/nfstrace.h
index bd60f8d1e181..a0d6910aa03a 100644
--- a/fs/nfs/nfstrace.h
+++ b/fs/nfs/nfstrace.h
@@ -969,6 +969,91 @@ TRACE_EVENT(nfs_commit_done,
 		)
 );
 
+TRACE_DEFINE_ENUM(NFS_OK);
+TRACE_DEFINE_ENUM(NFSERR_PERM);
+TRACE_DEFINE_ENUM(NFSERR_NOENT);
+TRACE_DEFINE_ENUM(NFSERR_IO);
+TRACE_DEFINE_ENUM(NFSERR_NXIO);
+TRACE_DEFINE_ENUM(NFSERR_ACCES);
+TRACE_DEFINE_ENUM(NFSERR_EXIST);
+TRACE_DEFINE_ENUM(NFSERR_XDEV);
+TRACE_DEFINE_ENUM(NFSERR_NODEV);
+TRACE_DEFINE_ENUM(NFSERR_NOTDIR);
+TRACE_DEFINE_ENUM(NFSERR_ISDIR);
+TRACE_DEFINE_ENUM(NFSERR_INVAL);
+TRACE_DEFINE_ENUM(NFSERR_FBIG);
+TRACE_DEFINE_ENUM(NFSERR_NOSPC);
+TRACE_DEFINE_ENUM(NFSERR_ROFS);
+TRACE_DEFINE_ENUM(NFSERR_MLINK);
+TRACE_DEFINE_ENUM(NFSERR_NAMETOOLONG);
+TRACE_DEFINE_ENUM(NFSERR_NOTEMPTY);
+TRACE_DEFINE_ENUM(NFSERR_DQUOT);
+TRACE_DEFINE_ENUM(NFSERR_STALE);
+TRACE_DEFINE_ENUM(NFSERR_REMOTE);
+TRACE_DEFINE_ENUM(NFSERR_WFLUSH);
+TRACE_DEFINE_ENUM(NFSERR_BADHANDLE);
+TRACE_DEFINE_ENUM(NFSERR_NOT_SYNC);
+TRACE_DEFINE_ENUM(NFSERR_BAD_COOKIE);
+TRACE_DEFINE_ENUM(NFSERR_NOTSUPP);
+TRACE_DEFINE_ENUM(NFSERR_TOOSMALL);
+TRACE_DEFINE_ENUM(NFSERR_SERVERFAULT);
+TRACE_DEFINE_ENUM(NFSERR_BADTYPE);
+TRACE_DEFINE_ENUM(NFSERR_JUKEBOX);
+
+#define nfs_show_status(x) \
+	__print_symbolic(x, \
+			{ NFS_OK, "OK" }, \
+			{ NFSERR_PERM, "PERM" }, \
+			{ NFSERR_NOENT, "NOENT" }, \
+			{ NFSERR_IO, "IO" }, \
+			{ NFSERR_NXIO, "NXIO" }, \
+			{ NFSERR_ACCES, "ACCES" }, \
+			{ NFSERR_EXIST, "EXIST" }, \
+			{ NFSERR_XDEV, "XDEV" }, \
+			{ NFSERR_NODEV, "NODEV" }, \
+			{ NFSERR_NOTDIR, "NOTDIR" }, \
+			{ NFSERR_ISDIR, "ISDIR" }, \
+			{ NFSERR_INVAL, "INVAL" }, \
+			{ NFSERR_FBIG, "FBIG" }, \
+			{ NFSERR_NOSPC, "NOSPC" }, \
+			{ NFSERR_ROFS, "ROFS" }, \
+			{ NFSERR_MLINK, "MLINK" }, \
+			{ NFSERR_NAMETOOLONG, "NAMETOOLONG" }, \
+			{ NFSERR_NOTEMPTY, "NOTEMPTY" }, \
+			{ NFSERR_DQUOT, "DQUOT" }, \
+			{ NFSERR_STALE, "STALE" }, \
+			{ NFSERR_REMOTE, "REMOTE" }, \
+			{ NFSERR_WFLUSH, "WFLUSH" }, \
+			{ NFSERR_BADHANDLE, "BADHANDLE" }, \
+			{ NFSERR_NOT_SYNC, "NOTSYNC" }, \
+			{ NFSERR_BAD_COOKIE, "BADCOOKIE" }, \
+			{ NFSERR_NOTSUPP, "NOTSUPP" }, \
+			{ NFSERR_TOOSMALL, "TOOSMALL" }, \
+			{ NFSERR_SERVERFAULT, "REMOTEIO" }, \
+			{ NFSERR_BADTYPE, "BADTYPE" }, \
+			{ NFSERR_JUKEBOX, "JUKEBOX" })
+
+TRACE_EVENT(nfs_xdr_status,
+		TP_PROTO(
+			int error
+		),
+
+		TP_ARGS(error),
+
+		TP_STRUCT__entry(
+			__field(int, error)
+		),
+
+		TP_fast_assign(
+			__entry->error = error;
+		),
+
+		TP_printk(
+			"error=%d (%s)",
+			__entry->error, nfs_show_status(__entry->error)
+		)
+);
+
 #endif /* _TRACE_NFS_H */
 
 #undef TRACE_INCLUDE_PATH
diff --git a/fs/nfs/pagelist.c b/fs/nfs/pagelist.c
index e54d899c1848..6ef5278326b6 100644
--- a/fs/nfs/pagelist.c
+++ b/fs/nfs/pagelist.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/nfs/pagelist.c
  *
@@ -16,8 +17,8 @@
 #include <linux/nfs.h>
 #include <linux/nfs3.h>
 #include <linux/nfs4.h>
-#include <linux/nfs_page.h>
 #include <linux/nfs_fs.h>
+#include <linux/nfs_page.h>
 #include <linux/nfs_mount.h>
 #include <linux/export.h>
 
@@ -47,7 +48,7 @@ void nfs_pgheader_init(struct nfs_pageio_descriptor *desc,
 
 	hdr->req = nfs_list_entry(mirror->pg_list.next);
 	hdr->inode = desc->pg_inode;
-	hdr->cred = hdr->req->wb_context->cred;
+	hdr->cred = nfs_req_openctx(hdr->req)->cred;
 	hdr->io_start = req_offset(hdr->req);
 	hdr->good_bytes = mirror->pg_count;
 	hdr->io_completion = desc->pg_io_completion;
@@ -295,25 +296,13 @@ out:
 		nfs_release_request(head);
 }
 
-/**
- * nfs_create_request - Create an NFS read/write request.
- * @ctx: open context to use
- * @page: page to write
- * @last: last nfs request created for this page group or NULL if head
- * @offset: starting offset within the page for the write
- * @count: number of bytes to read/write
- *
- * The page must be locked by the caller. This makes sure we never
- * create two different requests for the same page.
- * User should ensure it is safe to sleep in this function.
- */
-struct nfs_page *
-nfs_create_request(struct nfs_open_context *ctx, struct page *page,
-		   struct nfs_page *last, unsigned int offset,
+static struct nfs_page *
+__nfs_create_request(struct nfs_lock_context *l_ctx, struct page *page,
+		   unsigned int pgbase, unsigned int offset,
 		   unsigned int count)
 {
 	struct nfs_page		*req;
-	struct nfs_lock_context *l_ctx;
+	struct nfs_open_context *ctx = l_ctx->open_context;
 
 	if (test_bit(NFS_CONTEXT_BAD, &ctx->flags))
 		return ERR_PTR(-EBADF);
@@ -322,13 +311,8 @@ nfs_create_request(struct nfs_open_context *ctx, struct page *page,
 	if (req == NULL)
 		return ERR_PTR(-ENOMEM);
 
-	/* get lock context early so we can deal with alloc failures */
-	l_ctx = nfs_get_lock_context(ctx);
-	if (IS_ERR(l_ctx)) {
-		nfs_page_free(req);
-		return ERR_CAST(l_ctx);
-	}
 	req->wb_lock_context = l_ctx;
+	refcount_inc(&l_ctx->count);
 	atomic_inc(&l_ctx->io_count);
 
 	/* Initialize the request struct. Initially, we assume a
@@ -340,17 +324,61 @@ nfs_create_request(struct nfs_open_context *ctx, struct page *page,
 		get_page(page);
 	}
 	req->wb_offset  = offset;
-	req->wb_pgbase	= offset;
+	req->wb_pgbase	= pgbase;
 	req->wb_bytes   = count;
-	req->wb_context = get_nfs_open_context(ctx);
 	kref_init(&req->wb_kref);
-	nfs_page_group_init(req, last);
+	req->wb_nio = 0;
 	return req;
 }
 
 /**
+ * nfs_create_request - Create an NFS read/write request.
+ * @ctx: open context to use
+ * @page: page to write
+ * @offset: starting offset within the page for the write
+ * @count: number of bytes to read/write
+ *
+ * The page must be locked by the caller. This makes sure we never
+ * create two different requests for the same page.
+ * User should ensure it is safe to sleep in this function.
+ */
+struct nfs_page *
+nfs_create_request(struct nfs_open_context *ctx, struct page *page,
+		   unsigned int offset, unsigned int count)
+{
+	struct nfs_lock_context *l_ctx = nfs_get_lock_context(ctx);
+	struct nfs_page *ret;
+
+	if (IS_ERR(l_ctx))
+		return ERR_CAST(l_ctx);
+	ret = __nfs_create_request(l_ctx, page, offset, offset, count);
+	if (!IS_ERR(ret))
+		nfs_page_group_init(ret, NULL);
+	nfs_put_lock_context(l_ctx);
+	return ret;
+}
+
+static struct nfs_page *
+nfs_create_subreq(struct nfs_page *req, struct nfs_page *last,
+		  unsigned int pgbase, unsigned int offset,
+		  unsigned int count)
+{
+	struct nfs_page *ret;
+
+	ret = __nfs_create_request(req->wb_lock_context, req->wb_page,
+			pgbase, offset, count);
+	if (!IS_ERR(ret)) {
+		nfs_lock_request(ret);
+		ret->wb_index = req->wb_index;
+		nfs_page_group_init(ret, last);
+		ret->wb_nio = req->wb_nio;
+	}
+	return ret;
+}
+
+/**
  * nfs_unlock_request - Unlock request and wake up sleepers.
- * @req:
+ * @req: pointer to request
  */
 void nfs_unlock_request(struct nfs_page *req)
 {
@@ -368,7 +396,7 @@ void nfs_unlock_request(struct nfs_page *req)
 
 /**
  * nfs_unlock_and_release_request - Unlock request and release the nfs_page
- * @req:
+ * @req: pointer to request
  */
 void nfs_unlock_and_release_request(struct nfs_page *req)
 {
@@ -386,8 +414,8 @@ void nfs_unlock_and_release_request(struct nfs_page *req)
 static void nfs_clear_request(struct nfs_page *req)
 {
 	struct page *page = req->wb_page;
-	struct nfs_open_context *ctx = req->wb_context;
 	struct nfs_lock_context *l_ctx = req->wb_lock_context;
+	struct nfs_open_context *ctx;
 
 	if (page != NULL) {
 		put_page(page);
@@ -396,16 +424,13 @@ static void nfs_clear_request(struct nfs_page *req)
 	if (l_ctx != NULL) {
 		if (atomic_dec_and_test(&l_ctx->io_count)) {
 			wake_up_var(&l_ctx->io_count);
+			ctx = l_ctx->open_context;
 			if (test_bit(NFS_CONTEXT_UNLOCK, &ctx->flags))
 				rpc_wake_up(&NFS_SERVER(d_inode(ctx->dentry))->uoc_rpcwaitq);
 		}
 		nfs_put_lock_context(l_ctx);
 		req->wb_lock_context = NULL;
 	}
-	if (ctx != NULL) {
-		put_nfs_open_context(ctx);
-		req->wb_context = NULL;
-	}
 }
 
 /**
@@ -531,7 +556,6 @@ EXPORT_SYMBOL_GPL(nfs_pgio_header_free);
  * nfs_pgio_rpcsetup - Set up arguments for a pageio call
  * @hdr: The pageio hdr
  * @count: Number of bytes to read
- * @offset: Initial offset
  * @how: How to commit data (writes only)
  * @cinfo: Commit information for the call (writes only)
  */
@@ -551,7 +575,7 @@ static void nfs_pgio_rpcsetup(struct nfs_pgio_header *hdr,
 	hdr->args.pgbase = req->wb_pgbase;
 	hdr->args.pages  = hdr->page_array.pagevec;
 	hdr->args.count  = count;
-	hdr->args.context = get_nfs_open_context(req->wb_context);
+	hdr->args.context = get_nfs_open_context(nfs_req_openctx(req));
 	hdr->args.lock_context = req->wb_lock_context;
 	hdr->args.stable  = NFS_UNSTABLE;
 	switch (how & (FLUSH_STABLE | FLUSH_COND_STABLE)) {
@@ -634,7 +658,6 @@ EXPORT_SYMBOL_GPL(nfs_initiate_pgio);
 
 /**
  * nfs_pgio_error - Clean up from a pageio error
- * @desc: IO descriptor
  * @hdr: pageio header
  */
 static void nfs_pgio_error(struct nfs_pgio_header *hdr)
@@ -700,6 +723,7 @@ void nfs_pageio_init(struct nfs_pageio_descriptor *desc,
 	desc->pg_mirrors_dynamic = NULL;
 	desc->pg_mirrors = desc->pg_mirrors_static;
 	nfs_pageio_mirror_init(&desc->pg_mirrors[0], bsize);
+	desc->pg_maxretrans = 0;
 }
 
 /**
@@ -768,8 +792,7 @@ int nfs_generic_pgio(struct nfs_pageio_descriptor *desc,
 	pageused = 0;
 	while (!list_empty(head)) {
 		req = nfs_list_entry(head->next);
-		nfs_list_remove_request(req);
-		nfs_list_add_request(req, &hdr->pages);
+		nfs_list_move_request(req, &hdr->pages);
 
 		if (!last_page || last_page != req->wb_page) {
 			pageused++;
@@ -893,6 +916,7 @@ static bool nfs_match_lock_context(const struct nfs_lock_context *l1,
  * nfs_can_coalesce_requests - test two requests for compatibility
  * @prev: pointer to nfs_page
  * @req: pointer to nfs_page
+ * @pgio: pointer to nfs_pagio_descriptor
  *
  * The nfs_page structures 'prev' and 'req' are compared to ensure that the
  * page data area they describe is contiguous, and that their RPC
@@ -908,9 +932,9 @@ static bool nfs_can_coalesce_requests(struct nfs_page *prev,
 	struct file_lock_context *flctx;
 
 	if (prev) {
-		if (!nfs_match_open_context(req->wb_context, prev->wb_context))
+		if (!nfs_match_open_context(nfs_req_openctx(req), nfs_req_openctx(prev)))
 			return false;
-		flctx = d_inode(req->wb_context->dentry)->i_flctx;
+		flctx = d_inode(nfs_req_openctx(req)->dentry)->i_flctx;
 		if (flctx != NULL &&
 		    !(list_empty_careful(&flctx->flc_posix) &&
 		      list_empty_careful(&flctx->flc_flock)) &&
@@ -959,10 +983,18 @@ static int nfs_pageio_do_add_request(struct nfs_pageio_descriptor *desc,
 			return 0;
 		mirror->pg_base = req->wb_pgbase;
 	}
+
+	if (desc->pg_maxretrans && req->wb_nio > desc->pg_maxretrans) {
+		if (NFS_SERVER(desc->pg_inode)->flags & NFS_MOUNT_SOFTERR)
+			desc->pg_error = -ETIMEDOUT;
+		else
+			desc->pg_error = -EIO;
+		return 0;
+	}
+
 	if (!nfs_can_coalesce_requests(prev, req, desc))
 		return 0;
-	nfs_list_remove_request(req);
-	nfs_list_add_request(req, &mirror->pg_list);
+	nfs_list_move_request(req, &mirror->pg_list);
 	mirror->pg_count += req->wb_bytes;
 	return 1;
 }
@@ -988,6 +1020,16 @@ static void nfs_pageio_doio(struct nfs_pageio_descriptor *desc)
 	}
 }
 
+static void
+nfs_pageio_cleanup_request(struct nfs_pageio_descriptor *desc,
+		struct nfs_page *req)
+{
+	LIST_HEAD(head);
+
+	nfs_list_move_request(req, &head);
+	desc->pg_completion_ops->error_cleanup(&head, desc->pg_error);
+}
+
 /**
  * nfs_pageio_add_request - Attempt to coalesce a request into a page list.
  * @desc: destination io descriptor
@@ -1025,10 +1067,8 @@ static int __nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
 			nfs_page_group_unlock(req);
 			desc->pg_moreio = 1;
 			nfs_pageio_doio(desc);
-			if (desc->pg_error < 0)
-				return 0;
-			if (mirror->pg_recoalesce)
-				return 0;
+			if (desc->pg_error < 0 || mirror->pg_recoalesce)
+				goto out_cleanup_subreq;
 			/* retry add_request for this subreq */
 			nfs_page_group_lock(req);
 			continue;
@@ -1044,14 +1084,10 @@ static int __nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
 		pgbase += subreq->wb_bytes;
 
 		if (bytes_left) {
-			subreq = nfs_create_request(req->wb_context,
-					req->wb_page,
-					subreq, pgbase, bytes_left);
+			subreq = nfs_create_subreq(req, subreq, pgbase,
+					offset, bytes_left);
 			if (IS_ERR(subreq))
 				goto err_ptr;
-			nfs_lock_request(subreq);
-			subreq->wb_offset  = offset;
-			subreq->wb_index = req->wb_index;
 		}
 	} while (bytes_left > 0);
 
@@ -1061,6 +1097,10 @@ err_ptr:
 	desc->pg_error = PTR_ERR(subreq);
 	nfs_page_group_unlock(req);
 	return 0;
+out_cleanup_subreq:
+	if (req != subreq)
+		nfs_pageio_cleanup_request(desc, subreq);
+	return 0;
 }
 
 static int nfs_do_recoalesce(struct nfs_pageio_descriptor *desc)
@@ -1079,7 +1119,6 @@ static int nfs_do_recoalesce(struct nfs_pageio_descriptor *desc)
 			struct nfs_page *req;
 
 			req = list_first_entry(&head, struct nfs_page, wb_list);
-			nfs_list_remove_request(req);
 			if (__nfs_pageio_add_request(desc, req))
 				continue;
 			if (desc->pg_error < 0) {
@@ -1120,7 +1159,8 @@ static void nfs_pageio_error_cleanup(struct nfs_pageio_descriptor *desc)
 
 	for (midx = 0; midx < desc->pg_mirror_count; midx++) {
 		mirror = &desc->pg_mirrors[midx];
-		desc->pg_completion_ops->error_cleanup(&mirror->pg_list);
+		desc->pg_completion_ops->error_cleanup(&mirror->pg_list,
+				desc->pg_error);
 	}
 }
 
@@ -1149,30 +1189,28 @@ int nfs_pageio_add_request(struct nfs_pageio_descriptor *desc,
 			     lastreq = lastreq->wb_this_page)
 				;
 
-			dupreq = nfs_create_request(req->wb_context,
-					req->wb_page, lastreq, pgbase, bytes);
+			dupreq = nfs_create_subreq(req, lastreq,
+					pgbase, offset, bytes);
 
+			nfs_page_group_unlock(req);
 			if (IS_ERR(dupreq)) {
-				nfs_page_group_unlock(req);
 				desc->pg_error = PTR_ERR(dupreq);
 				goto out_failed;
 			}
-
-			nfs_lock_request(dupreq);
-			nfs_page_group_unlock(req);
-			dupreq->wb_offset = offset;
-			dupreq->wb_index = req->wb_index;
 		} else
 			dupreq = req;
 
 		if (nfs_pgio_has_mirroring(desc))
 			desc->pg_mirror_idx = midx;
 		if (!nfs_pageio_add_request_mirror(desc, dupreq))
-			goto out_failed;
+			goto out_cleanup_subreq;
 	}
 
 	return 1;
 
+out_cleanup_subreq:
+	if (req != dupreq)
+		nfs_pageio_cleanup_request(desc, dupreq);
 out_failed:
 	nfs_pageio_error_cleanup(desc);
 	return 0;
@@ -1194,7 +1232,7 @@ static void nfs_pageio_complete_mirror(struct nfs_pageio_descriptor *desc,
 		desc->pg_mirror_idx = mirror_idx;
 	for (;;) {
 		nfs_pageio_doio(desc);
-		if (!mirror->pg_recoalesce)
+		if (desc->pg_error < 0 || !mirror->pg_recoalesce)
 			break;
 		if (!nfs_do_recoalesce(desc))
 			break;
@@ -1222,9 +1260,8 @@ int nfs_pageio_resend(struct nfs_pageio_descriptor *desc,
 	while (!list_empty(&hdr->pages)) {
 		struct nfs_page *req = nfs_list_entry(hdr->pages.next);
 
-		nfs_list_remove_request(req);
 		if (!nfs_pageio_add_request(desc, req))
-			nfs_list_add_request(req, &failed);
+			nfs_list_move_request(req, &failed);
 	}
 	nfs_pageio_complete(desc);
 	if (!list_empty(&failed)) {
diff --git a/fs/nfs/pnfs.c b/fs/nfs/pnfs.c
index 53726da5c010..83722e936b4a 100644
--- a/fs/nfs/pnfs.c
+++ b/fs/nfs/pnfs.c
@@ -758,22 +758,35 @@ static int
 pnfs_layout_bulk_destroy_byserver_locked(struct nfs_client *clp,
 		struct nfs_server *server,
 		struct list_head *layout_list)
+	__must_hold(&clp->cl_lock)
+	__must_hold(RCU)
 {
 	struct pnfs_layout_hdr *lo, *next;
 	struct inode *inode;
 
 	list_for_each_entry_safe(lo, next, &server->layouts, plh_layouts) {
-		if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags))
+		if (test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
+		    test_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags) ||
+		    !list_empty(&lo->plh_bulk_destroy))
 			continue;
+		/* If the sb is being destroyed, just bail */
+		if (!nfs_sb_active(server->super))
+			break;
 		inode = igrab(lo->plh_inode);
-		if (inode == NULL)
-			continue;
-		list_del_init(&lo->plh_layouts);
-		if (pnfs_layout_add_bulk_destroy_list(inode, layout_list))
-			continue;
-		rcu_read_unlock();
-		spin_unlock(&clp->cl_lock);
-		iput(inode);
+		if (inode != NULL) {
+			list_del_init(&lo->plh_layouts);
+			if (pnfs_layout_add_bulk_destroy_list(inode,
+						layout_list))
+				continue;
+			rcu_read_unlock();
+			spin_unlock(&clp->cl_lock);
+			iput(inode);
+		} else {
+			rcu_read_unlock();
+			spin_unlock(&clp->cl_lock);
+			set_bit(NFS_LAYOUT_INODE_FREEING, &lo->plh_flags);
+		}
+		nfs_sb_deactive(server->super);
 		spin_lock(&clp->cl_lock);
 		rcu_read_lock();
 		return -EAGAIN;
@@ -811,7 +824,7 @@ pnfs_layout_free_bulk_destroy_list(struct list_head *layout_list,
 		/* Free all lsegs that are attached to commit buckets */
 		nfs_commit_inode(inode, 0);
 		pnfs_put_layout_hdr(lo);
-		iput(inode);
+		nfs_iput_and_deactive(inode);
 	}
 	return ret;
 }
@@ -1876,7 +1889,7 @@ lookup_again:
 	    atomic_read(&lo->plh_outstanding) != 0) {
 		spin_unlock(&ino->i_lock);
 		lseg = ERR_PTR(wait_var_event_killable(&lo->plh_outstanding,
-					atomic_read(&lo->plh_outstanding)));
+					!atomic_read(&lo->plh_outstanding)));
 		if (IS_ERR(lseg) || !list_empty(&lo->plh_segs))
 			goto out_put_layout_hdr;
 		pnfs_put_layout_hdr(lo);
@@ -2423,7 +2436,7 @@ pnfs_generic_pg_init_read(struct nfs_pageio_descriptor *pgio, struct nfs_page *r
 			rd_size = nfs_dreq_bytes_left(pgio->pg_dreq);
 
 		pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
-						   req->wb_context,
+						   nfs_req_openctx(req),
 						   req_offset(req),
 						   rd_size,
 						   IOMODE_READ,
@@ -2450,7 +2463,7 @@ pnfs_generic_pg_init_write(struct nfs_pageio_descriptor *pgio,
 	pnfs_generic_pg_check_range(pgio, req);
 	if (pgio->pg_lseg == NULL) {
 		pgio->pg_lseg = pnfs_update_layout(pgio->pg_inode,
-						   req->wb_context,
+						   nfs_req_openctx(req),
 						   req_offset(req),
 						   wb_size,
 						   IOMODE_RW,
diff --git a/fs/nfs/pnfs.h b/fs/nfs/pnfs.h
index 5e80a07b7bea..f15609c003d8 100644
--- a/fs/nfs/pnfs.h
+++ b/fs/nfs/pnfs.h
@@ -104,6 +104,7 @@ enum {
 	NFS_LAYOUT_RETURN_REQUESTED,	/* Return this layout ASAP */
 	NFS_LAYOUT_INVALID_STID,	/* layout stateid id is invalid */
 	NFS_LAYOUT_FIRST_LAYOUTGET,	/* Serialize first layoutget */
+	NFS_LAYOUT_INODE_FREEING,	/* The inode is being freed */
 };
 
 enum layoutdriver_policy_flags {
@@ -349,6 +350,7 @@ void nfs4_delete_deviceid(const struct pnfs_layoutdriver_type *, const struct nf
 void nfs4_init_deviceid_node(struct nfs4_deviceid_node *, struct nfs_server *,
 			     const struct nfs4_deviceid *);
 bool nfs4_put_deviceid_node(struct nfs4_deviceid_node *);
+void nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node);
 void nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node);
 bool nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node);
 void nfs4_deviceid_purge_client(const struct nfs_client *);
@@ -457,7 +459,7 @@ static inline bool
 pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
 			 struct nfs_commit_info *cinfo, u32 ds_commit_idx)
 {
-	struct inode *inode = d_inode(req->wb_context->dentry);
+	struct inode *inode = d_inode(nfs_req_openctx(req)->dentry);
 	struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
 
 	if (lseg == NULL || ld->mark_request_commit == NULL)
@@ -469,7 +471,7 @@ pnfs_mark_request_commit(struct nfs_page *req, struct pnfs_layout_segment *lseg,
 static inline bool
 pnfs_clear_request_commit(struct nfs_page *req, struct nfs_commit_info *cinfo)
 {
-	struct inode *inode = d_inode(req->wb_context->dentry);
+	struct inode *inode = d_inode(nfs_req_openctx(req)->dentry);
 	struct pnfs_layoutdriver_type *ld = NFS_SERVER(inode)->pnfs_curr_ld;
 
 	if (ld == NULL || ld->clear_request_commit == NULL)
diff --git a/fs/nfs/pnfs_dev.c b/fs/nfs/pnfs_dev.c
index 7fb59487ee90..537b80d693f1 100644
--- a/fs/nfs/pnfs_dev.c
+++ b/fs/nfs/pnfs_dev.c
@@ -284,10 +284,22 @@ nfs4_put_deviceid_node(struct nfs4_deviceid_node *d)
 EXPORT_SYMBOL_GPL(nfs4_put_deviceid_node);
 
 void
+nfs4_mark_deviceid_available(struct nfs4_deviceid_node *node)
+{
+	if (test_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags)) {
+		clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);
+		smp_mb__after_atomic();
+	}
+}
+EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_available);
+
+void
 nfs4_mark_deviceid_unavailable(struct nfs4_deviceid_node *node)
 {
 	node->timestamp_unavailable = jiffies;
+	smp_mb__before_atomic();
 	set_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);
+	smp_mb__after_atomic();
 }
 EXPORT_SYMBOL_GPL(nfs4_mark_deviceid_unavailable);
 
@@ -302,6 +314,7 @@ nfs4_test_deviceid_unavailable(struct nfs4_deviceid_node *node)
 		if (time_in_range(node->timestamp_unavailable, start, end))
 			return true;
 		clear_bit(NFS_DEVICEID_UNAVAILABLE, &node->flags);
+		smp_mb__after_atomic();
 	}
 	return false;
 }
diff --git a/fs/nfs/pnfs_nfs.c b/fs/nfs/pnfs_nfs.c
index f5ad75fafc3c..c0046c348910 100644
--- a/fs/nfs/pnfs_nfs.c
+++ b/fs/nfs/pnfs_nfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Common NFS I/O  operations for the pnfs file based
  * layout drivers.
diff --git a/fs/nfs/read.c b/fs/nfs/read.c
index f9f19784db82..c19841c82b6a 100644
--- a/fs/nfs/read.c
+++ b/fs/nfs/read.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/nfs/read.c
  *
@@ -92,7 +93,7 @@ EXPORT_SYMBOL_GPL(nfs_pageio_reset_read_mds);
 
 static void nfs_readpage_release(struct nfs_page *req)
 {
-	struct inode *inode = d_inode(req->wb_context->dentry);
+	struct inode *inode = d_inode(nfs_req_openctx(req)->dentry);
 
 	dprintk("NFS: read done (%s/%llu %d@%lld)\n", inode->i_sb->s_id,
 		(unsigned long long)NFS_FILEID(inode), req->wb_bytes,
@@ -118,7 +119,7 @@ int nfs_readpage_async(struct nfs_open_context *ctx, struct inode *inode,
 	len = nfs_page_length(page);
 	if (len == 0)
 		return nfs_return_empty_page(page);
-	new = nfs_create_request(ctx, page, NULL, 0, len);
+	new = nfs_create_request(ctx, page, 0, len);
 	if (IS_ERR(new)) {
 		unlock_page(page);
 		return PTR_ERR(new);
@@ -205,7 +206,7 @@ static void nfs_initiate_read(struct nfs_pgio_header *hdr,
 }
 
 static void
-nfs_async_read_error(struct list_head *head)
+nfs_async_read_error(struct list_head *head, int error)
 {
 	struct nfs_page	*req;
 
@@ -363,7 +364,7 @@ readpage_async_filler(void *data, struct page *page)
 	if (len == 0)
 		return nfs_return_empty_page(page);
 
-	new = nfs_create_request(desc->ctx, page, NULL, 0, len);
+	new = nfs_create_request(desc->ctx, page, 0, len);
 	if (IS_ERR(new))
 		goto out_error;
 
diff --git a/fs/nfs/super.c b/fs/nfs/super.c
index 0570391eaa16..f88ddac2dcdf 100644
--- a/fs/nfs/super.c
+++ b/fs/nfs/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/nfs/super.c
  *
@@ -78,7 +79,7 @@
 
 enum {
 	/* Mount options that take no arguments */
-	Opt_soft, Opt_hard,
+	Opt_soft, Opt_softerr, Opt_hard,
 	Opt_posix, Opt_noposix,
 	Opt_cto, Opt_nocto,
 	Opt_ac, Opt_noac,
@@ -125,6 +126,7 @@ static const match_table_t nfs_mount_option_tokens = {
 	{ Opt_sloppy, "sloppy" },
 
 	{ Opt_soft, "soft" },
+	{ Opt_softerr, "softerr" },
 	{ Opt_hard, "hard" },
 	{ Opt_deprecated, "intr" },
 	{ Opt_deprecated, "nointr" },
@@ -309,7 +311,7 @@ struct file_system_type nfs_xdev_fs_type = {
 
 const struct super_operations nfs_sops = {
 	.alloc_inode	= nfs_alloc_inode,
-	.destroy_inode	= nfs_destroy_inode,
+	.free_inode	= nfs_free_inode,
 	.write_inode	= nfs_write_inode,
 	.drop_inode	= nfs_drop_inode,
 	.statfs		= nfs_statfs,
@@ -628,7 +630,8 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
 		const char *str;
 		const char *nostr;
 	} nfs_info[] = {
-		{ NFS_MOUNT_SOFT, ",soft", ",hard" },
+		{ NFS_MOUNT_SOFT, ",soft", "" },
+		{ NFS_MOUNT_SOFTERR, ",softerr", "" },
 		{ NFS_MOUNT_POSIX, ",posix", "" },
 		{ NFS_MOUNT_NOCTO, ",nocto", "" },
 		{ NFS_MOUNT_NOAC, ",noac", "" },
@@ -658,6 +661,8 @@ static void nfs_show_mount_options(struct seq_file *m, struct nfs_server *nfss,
 		seq_printf(m, ",acdirmin=%u", nfss->acdirmin/HZ);
 	if (nfss->acdirmax != NFS_DEF_ACDIRMAX*HZ || showdefaults)
 		seq_printf(m, ",acdirmax=%u", nfss->acdirmax/HZ);
+	if (!(nfss->flags & (NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR)))
+			seq_puts(m, ",hard");
 	for (nfs_infop = nfs_info; nfs_infop->flag; nfs_infop++) {
 		if (nfss->flags & nfs_infop->flag)
 			seq_puts(m, nfs_infop->str);
@@ -1239,10 +1244,15 @@ static int nfs_parse_mount_options(char *raw,
 		 */
 		case Opt_soft:
 			mnt->flags |= NFS_MOUNT_SOFT;
+			mnt->flags &= ~NFS_MOUNT_SOFTERR;
 			break;
-		case Opt_hard:
+		case Opt_softerr:
+			mnt->flags |= NFS_MOUNT_SOFTERR;
 			mnt->flags &= ~NFS_MOUNT_SOFT;
 			break;
+		case Opt_hard:
+			mnt->flags &= ~(NFS_MOUNT_SOFT|NFS_MOUNT_SOFTERR);
+			break;
 		case Opt_posix:
 			mnt->flags |= NFS_MOUNT_POSIX;
 			break;
@@ -1919,7 +1929,7 @@ static int nfs_parse_devname(const char *dev_name,
 		/* kill possible hostname list: not supported */
 		comma = strchr(dev_name, ',');
 		if (comma != NULL && comma < end)
-			*comma = 0;
+			len = comma - dev_name;
 	}
 
 	if (len > maxnamlen)
@@ -2041,7 +2051,8 @@ static int nfs23_validate_mount_data(void *options,
 		memcpy(sap, &data->addr, sizeof(data->addr));
 		args->nfs_server.addrlen = sizeof(data->addr);
 		args->nfs_server.port = ntohs(data->addr.sin_port);
-		if (!nfs_verify_server_address(sap))
+		if (sap->sa_family != AF_INET ||
+		    !nfs_verify_server_address(sap))
 			goto out_no_address;
 
 		if (!(data->flags & NFS_MOUNT_TCP))
@@ -2475,6 +2486,21 @@ static int nfs_compare_super_address(struct nfs_server *server1,
 	return 1;
 }
 
+static int nfs_compare_userns(const struct nfs_server *old,
+		const struct nfs_server *new)
+{
+	const struct user_namespace *oldns = &init_user_ns;
+	const struct user_namespace *newns = &init_user_ns;
+
+	if (old->client && old->client->cl_cred)
+		oldns = old->client->cl_cred->user_ns;
+	if (new->client && new->client->cl_cred)
+		newns = new->client->cl_cred->user_ns;
+	if (oldns != newns)
+		return 0;
+	return 1;
+}
+
 static int nfs_compare_super(struct super_block *sb, void *data)
 {
 	struct nfs_sb_mountdata *sb_mntdata = data;
@@ -2488,6 +2514,8 @@ static int nfs_compare_super(struct super_block *sb, void *data)
 		return 0;
 	if (memcmp(&old->fsid, &server->fsid, sizeof(old->fsid)) != 0)
 		return 0;
+	if (!nfs_compare_userns(old, server))
+		return 0;
 	return nfs_compare_mount_options(sb, server, mntflags);
 }
 
diff --git a/fs/nfs/symlink.c b/fs/nfs/symlink.c
index 06eb44b47885..25ba299fdac2 100644
--- a/fs/nfs/symlink.c
+++ b/fs/nfs/symlink.c
@@ -26,8 +26,9 @@
  * and straight-forward than readdir caching.
  */
 
-static int nfs_symlink_filler(struct inode *inode, struct page *page)
+static int nfs_symlink_filler(void *data, struct page *page)
 {
+	struct inode *inode = data;
 	int error;
 
 	error = NFS_PROTO(inode)->readlink(inode, page, 0, PAGE_SIZE);
@@ -65,8 +66,8 @@ static const char *nfs_get_link(struct dentry *dentry,
 		err = ERR_PTR(nfs_revalidate_mapping(inode, inode->i_mapping));
 		if (err)
 			return err;
-		page = read_cache_page(&inode->i_data, 0,
-					(filler_t *)nfs_symlink_filler, inode);
+		page = read_cache_page(&inode->i_data, 0, nfs_symlink_filler,
+				inode);
 		if (IS_ERR(page))
 			return ERR_CAST(page);
 	}
diff --git a/fs/nfs/unlink.c b/fs/nfs/unlink.c
index 79b97b3c4427..0effeee28352 100644
--- a/fs/nfs/unlink.c
+++ b/fs/nfs/unlink.c
@@ -39,6 +39,7 @@ nfs_free_unlinkdata(struct nfs_unlinkdata *data)
 /**
  * nfs_async_unlink_done - Sillydelete post-processing
  * @task: rpc_task of the sillydelete
+ * @calldata: pointer to nfs_unlinkdata
  *
  * Do the directory attribute update.
  */
@@ -54,7 +55,7 @@ static void nfs_async_unlink_done(struct rpc_task *task, void *calldata)
 
 /**
  * nfs_async_unlink_release - Release the sillydelete data.
- * @task: rpc_task of the sillydelete
+ * @calldata: struct nfs_unlinkdata to release
  *
  * We need to call nfs_put_unlinkdata as a 'tk_release' task since the
  * rpc_task would be freed too.
@@ -159,8 +160,8 @@ static int nfs_call_unlink(struct dentry *dentry, struct inode *inode, struct nf
 
 /**
  * nfs_async_unlink - asynchronous unlinking of a file
- * @dir: parent directory of dentry
- * @dentry: dentry to unlink
+ * @dentry: parent directory of dentry
+ * @name: name of dentry to unlink
  */
 static int
 nfs_async_unlink(struct dentry *dentry, const struct qstr *name)
@@ -324,6 +325,7 @@ static const struct rpc_call_ops nfs_rename_ops = {
  * @new_dir: target directory for the rename
  * @old_dentry: original dentry to be renamed
  * @new_dentry: dentry to which the old_dentry should be renamed
+ * @complete: Function to run on successful completion
  *
  * It's expected that valid references to the dentries and inodes are held
  */
@@ -394,12 +396,6 @@ nfs_complete_sillyrename(struct rpc_task *task, struct nfs_renamedata *data)
 		nfs_cancel_async_unlink(dentry);
 		return;
 	}
-
-	/*
-	 * vfs_unlink and the like do not issue this when a file is
-	 * sillyrenamed, so do it here.
-	 */
-	fsnotify_nameremove(dentry, 0);
 }
 
 #define SILLYNAME_PREFIX ".nfs"
diff --git a/fs/nfs/write.c b/fs/nfs/write.c
index f12cb31a41e5..059a7c38bc4f 100644
--- a/fs/nfs/write.c
+++ b/fs/nfs/write.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * linux/fs/nfs/write.c
  *
@@ -26,6 +27,7 @@
 #include <linux/iversion.h>
 
 #include <linux/uaccess.h>
+#include <linux/sched/mm.h>
 
 #include "delegation.h"
 #include "internal.h"
@@ -238,9 +240,15 @@ out:
 }
 
 /* A writeback failed: mark the page as bad, and invalidate the page cache */
-static void nfs_set_pageerror(struct page *page)
+static void nfs_set_pageerror(struct address_space *mapping)
 {
-	nfs_zap_mapping(page_file_mapping(page)->host, page_file_mapping(page));
+	nfs_zap_mapping(mapping->host, mapping);
+}
+
+static void nfs_mapping_set_error(struct page *page, int error)
+{
+	SetPageError(page);
+	mapping_set_error(page_file_mapping(page), error);
 }
 
 /*
@@ -581,11 +589,10 @@ release_request:
 	return ERR_PTR(ret);
 }
 
-static void nfs_write_error_remove_page(struct nfs_page *req)
+static void nfs_write_error(struct nfs_page *req, int error)
 {
+	nfs_mapping_set_error(req->wb_page, error);
 	nfs_end_page_writeback(req);
-	generic_error_remove_page(page_file_mapping(req->wb_page),
-				  req->wb_page);
 	nfs_release_request(req);
 }
 
@@ -608,6 +615,7 @@ nfs_error_is_fatal_on_server(int err)
 static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
 				struct page *page)
 {
+	struct address_space *mapping;
 	struct nfs_page *req;
 	int ret = 0;
 
@@ -621,19 +629,19 @@ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
 	nfs_set_page_writeback(page);
 	WARN_ON_ONCE(test_bit(PG_CLEAN, &req->wb_flags));
 
-	ret = req->wb_context->error;
 	/* If there is a fatal error that covers this write, just exit */
-	if (nfs_error_is_fatal_on_server(ret))
+	ret = 0;
+	mapping = page_file_mapping(page);
+	if (test_bit(AS_ENOSPC, &mapping->flags) ||
+	    test_bit(AS_EIO, &mapping->flags))
 		goto out_launder;
 
-	ret = 0;
 	if (!nfs_pageio_add_request(pgio, req)) {
 		ret = pgio->pg_error;
 		/*
 		 * Remove the problematic req upon fatal errors on the server
 		 */
 		if (nfs_error_is_fatal(ret)) {
-			nfs_context_set_write_error(req->wb_context, ret);
 			if (nfs_error_is_fatal_on_server(ret))
 				goto out_launder;
 		} else
@@ -645,8 +653,8 @@ static int nfs_page_async_flush(struct nfs_pageio_descriptor *pgio,
 out:
 	return ret;
 out_launder:
-	nfs_write_error_remove_page(req);
-	return ret;
+	nfs_write_error(req, ret);
+	return 0;
 }
 
 static int nfs_do_writepage(struct page *page, struct writeback_control *wbc,
@@ -712,11 +720,13 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc)
 {
 	struct inode *inode = mapping->host;
 	struct nfs_pageio_descriptor pgio;
-	struct nfs_io_completion *ioc = nfs_io_completion_alloc(GFP_NOFS);
+	struct nfs_io_completion *ioc;
+	unsigned int pflags = memalloc_nofs_save();
 	int err;
 
 	nfs_inc_stats(inode, NFSIOS_VFSWRITEPAGES);
 
+	ioc = nfs_io_completion_alloc(GFP_NOFS);
 	if (ioc)
 		nfs_io_completion_init(ioc, nfs_io_completion_commit, inode);
 
@@ -727,6 +737,8 @@ int nfs_writepages(struct address_space *mapping, struct writeback_control *wbc)
 	nfs_pageio_complete(&pgio);
 	nfs_io_completion_put(ioc);
 
+	memalloc_nofs_restore(pflags);
+
 	if (err < 0)
 		goto out_err;
 	err = pgio.pg_error;
@@ -865,7 +877,6 @@ EXPORT_SYMBOL_GPL(nfs_request_add_commit_list_locked);
 /**
  * nfs_request_add_commit_list - add request to a commit list
  * @req: pointer to a struct nfs_page
- * @dst: commit list head
  * @cinfo: holds list lock and accounting info
  *
  * This sets the PG_CLEAN bit, updates the cinfo count of
@@ -954,7 +965,8 @@ static void
 nfs_clear_request_commit(struct nfs_page *req)
 {
 	if (test_bit(PG_CLEAN, &req->wb_flags)) {
-		struct inode *inode = d_inode(req->wb_context->dentry);
+		struct nfs_open_context *ctx = nfs_req_openctx(req);
+		struct inode *inode = d_inode(ctx->dentry);
 		struct nfs_commit_info cinfo;
 
 		nfs_init_cinfo_from_inode(&cinfo, inode);
@@ -994,11 +1006,13 @@ static void nfs_write_completion(struct nfs_pgio_header *hdr)
 		nfs_list_remove_request(req);
 		if (test_bit(NFS_IOHDR_ERROR, &hdr->flags) &&
 		    (hdr->good_bytes < bytes)) {
-			nfs_set_pageerror(req->wb_page);
-			nfs_context_set_write_error(req->wb_context, hdr->error);
+			nfs_set_pageerror(page_file_mapping(req->wb_page));
+			nfs_mapping_set_error(req->wb_page, hdr->error);
 			goto remove_req;
 		}
 		if (nfs_write_need_commit(hdr)) {
+			/* Reset wb_nio, since the write was successful. */
+			req->wb_nio = 0;
 			memcpy(&req->wb_verf, &hdr->verf.verifier, sizeof(req->wb_verf));
 			nfs_mark_request_commit(req, hdr->lseg, &cinfo,
 				hdr->pgio_mirror_idx);
@@ -1132,6 +1146,7 @@ static struct nfs_page *nfs_try_to_update_request(struct inode *inode,
 		req->wb_bytes = end - req->wb_offset;
 	else
 		req->wb_bytes = rqend - req->wb_offset;
+	req->wb_nio = 0;
 	return req;
 out_flushme:
 	/*
@@ -1161,7 +1176,7 @@ static struct nfs_page * nfs_setup_write_request(struct nfs_open_context* ctx,
 	req = nfs_try_to_update_request(inode, page, offset, bytes);
 	if (req != NULL)
 		goto out;
-	req = nfs_create_request(ctx, page, NULL, offset, bytes);
+	req = nfs_create_request(ctx, page, offset, bytes);
 	if (IS_ERR(req))
 		goto out;
 	nfs_inode_add_request(inode, req);
@@ -1206,7 +1221,7 @@ int nfs_flush_incompatible(struct file *file, struct page *page)
 			return 0;
 		l_ctx = req->wb_lock_context;
 		do_flush = req->wb_page != page ||
-			!nfs_match_open_context(req->wb_context, ctx);
+			!nfs_match_open_context(nfs_req_openctx(req), ctx);
 		if (l_ctx && flctx &&
 		    !(list_empty_careful(&flctx->flc_posix) &&
 		      list_empty_careful(&flctx->flc_flock))) {
@@ -1348,7 +1363,8 @@ int nfs_updatepage(struct file *file, struct page *page,
 		unsigned int offset, unsigned int count)
 {
 	struct nfs_open_context *ctx = nfs_file_open_context(file);
-	struct inode	*inode = page_file_mapping(page)->host;
+	struct address_space *mapping = page_file_mapping(page);
+	struct inode	*inode = mapping->host;
 	int		status = 0;
 
 	nfs_inc_stats(inode, NFSIOS_VFSUPDATEPAGE);
@@ -1366,7 +1382,7 @@ int nfs_updatepage(struct file *file, struct page *page,
 
 	status = nfs_writepage_setup(ctx, page, offset, count);
 	if (status < 0)
-		nfs_set_pageerror(page);
+		nfs_set_pageerror(mapping);
 	else
 		__set_page_dirty_nobuffers(page);
 out:
@@ -1405,26 +1421,31 @@ static void nfs_initiate_write(struct nfs_pgio_header *hdr,
  */
 static void nfs_redirty_request(struct nfs_page *req)
 {
+	/* Bump the transmission count */
+	req->wb_nio++;
 	nfs_mark_request_dirty(req);
-	set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags);
+	set_bit(NFS_CONTEXT_RESEND_WRITES, &nfs_req_openctx(req)->flags);
 	nfs_end_page_writeback(req);
 	nfs_release_request(req);
 }
 
-static void nfs_async_write_error(struct list_head *head)
+static void nfs_async_write_error(struct list_head *head, int error)
 {
 	struct nfs_page	*req;
 
 	while (!list_empty(head)) {
 		req = nfs_list_entry(head->next);
 		nfs_list_remove_request(req);
-		nfs_redirty_request(req);
+		if (nfs_error_is_fatal(error))
+			nfs_write_error(req, error);
+		else
+			nfs_redirty_request(req);
 	}
 }
 
 static void nfs_async_write_reschedule_io(struct nfs_pgio_header *hdr)
 {
-	nfs_async_write_error(&hdr->pages);
+	nfs_async_write_error(&hdr->pages, 0);
 	filemap_fdatawrite_range(hdr->inode->i_mapping, hdr->args.offset,
 			hdr->args.offset + hdr->args.count - 1);
 }
@@ -1723,7 +1744,8 @@ void nfs_init_commit(struct nfs_commit_data *data,
 		     struct nfs_commit_info *cinfo)
 {
 	struct nfs_page *first = nfs_list_entry(head->next);
-	struct inode *inode = d_inode(first->wb_context->dentry);
+	struct nfs_open_context *ctx = nfs_req_openctx(first);
+	struct inode *inode = d_inode(ctx->dentry);
 
 	/* Set up the RPC argument and reply structs
 	 * NB: take care not to mess about with data->commit et al. */
@@ -1731,7 +1753,7 @@ void nfs_init_commit(struct nfs_commit_data *data,
 	list_splice_init(head, &data->pages);
 
 	data->inode	  = inode;
-	data->cred	  = first->wb_context->cred;
+	data->cred	  = ctx->cred;
 	data->lseg	  = lseg; /* reference transferred */
 	/* only set lwb for pnfs commit */
 	if (lseg)
@@ -1744,7 +1766,7 @@ void nfs_init_commit(struct nfs_commit_data *data,
 	/* Note: we always request a commit of the entire inode */
 	data->args.offset = 0;
 	data->args.count  = 0;
-	data->context     = get_nfs_open_context(first->wb_context);
+	data->context     = get_nfs_open_context(ctx);
 	data->res.fattr   = &data->fattr;
 	data->res.verf    = &data->verf;
 	nfs_fattr_init(&data->fattr);
@@ -1827,14 +1849,15 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data)
 			nfs_clear_page_commit(req->wb_page);
 
 		dprintk("NFS:       commit (%s/%llu %d@%lld)",
-			req->wb_context->dentry->d_sb->s_id,
-			(unsigned long long)NFS_FILEID(d_inode(req->wb_context->dentry)),
+			nfs_req_openctx(req)->dentry->d_sb->s_id,
+			(unsigned long long)NFS_FILEID(d_inode(nfs_req_openctx(req)->dentry)),
 			req->wb_bytes,
 			(long long)req_offset(req));
 		if (status < 0) {
-			nfs_context_set_write_error(req->wb_context, status);
-			if (req->wb_page)
+			if (req->wb_page) {
+				nfs_mapping_set_error(req->wb_page, status);
 				nfs_inode_remove_request(req);
+			}
 			dprintk_cont(", error = %d\n", status);
 			goto next;
 		}
@@ -1851,7 +1874,7 @@ static void nfs_commit_release_pages(struct nfs_commit_data *data)
 		/* We have a mismatch. Write the page again */
 		dprintk_cont(" mismatch\n");
 		nfs_mark_request_dirty(req);
-		set_bit(NFS_CONTEXT_RESEND_WRITES, &req->wb_context->flags);
+		set_bit(NFS_CONTEXT_RESEND_WRITES, &nfs_req_openctx(req)->flags);
 	next:
 		nfs_unlock_and_release_request(req);
 		/* Latency breaker */
diff --git a/fs/nfs_common/Makefile b/fs/nfs_common/Makefile
index d153ca3ea577..4bebe834c009 100644
--- a/fs/nfs_common/Makefile
+++ b/fs/nfs_common/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for Linux filesystem routines that are shared by client and server.
 #
diff --git a/fs/nfs_common/grace.c b/fs/nfs_common/grace.c
index 5be08f02a76b..b73d9dd37f73 100644
--- a/fs/nfs_common/grace.c
+++ b/fs/nfs_common/grace.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Common code for control of lockd and nfsv4 grace periods.
  *
diff --git a/fs/nfs_common/nfsacl.c b/fs/nfs_common/nfsacl.c
index 538f142935ea..8ceb6425e01a 100644
--- a/fs/nfs_common/nfsacl.c
+++ b/fs/nfs_common/nfsacl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * fs/nfs_common/nfsacl.c
  *
diff --git a/fs/nfsd/Kconfig b/fs/nfsd/Kconfig
index 20b1c17320d5..d25f6bbe7006 100644
--- a/fs/nfsd/Kconfig
+++ b/fs/nfsd/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config NFSD
 	tristate "NFS server support"
 	depends on INET
diff --git a/fs/nfsd/blocklayout.c b/fs/nfsd/blocklayout.c
index 4fb1f72a25fb..66d4c55eb48e 100644
--- a/fs/nfsd/blocklayout.c
+++ b/fs/nfsd/blocklayout.c
@@ -121,15 +121,13 @@ nfsd4_block_commit_blocks(struct inode *inode, struct nfsd4_layoutcommit *lcp,
 {
 	loff_t new_size = lcp->lc_last_wr + 1;
 	struct iattr iattr = { .ia_valid = 0 };
-	struct timespec ts;
 	int error;
 
-	ts = timespec64_to_timespec(inode->i_mtime);
 	if (lcp->lc_mtime.tv_nsec == UTIME_NOW ||
-	    timespec_compare(&lcp->lc_mtime, &ts) < 0)
-		lcp->lc_mtime = timespec64_to_timespec(current_time(inode));
+	    timespec64_compare(&lcp->lc_mtime, &inode->i_mtime) < 0)
+		lcp->lc_mtime = current_time(inode);
 	iattr.ia_valid |= ATTR_ATIME | ATTR_CTIME | ATTR_MTIME;
-	iattr.ia_atime = iattr.ia_ctime = iattr.ia_mtime = timespec_to_timespec64(lcp->lc_mtime);
+	iattr.ia_atime = iattr.ia_ctime = iattr.ia_mtime = lcp->lc_mtime;
 
 	if (new_size > i_size_read(inode)) {
 		iattr.ia_valid |= ATTR_SIZE;
diff --git a/fs/nfsd/cache.h b/fs/nfsd/cache.h
index 4a98537efb0f..10ec5ecdf117 100644
--- a/fs/nfsd/cache.h
+++ b/fs/nfsd/cache.h
@@ -10,6 +10,7 @@
 #define NFSCACHE_H
 
 #include <linux/sunrpc/svc.h>
+#include "netns.h"
 
 /*
  * Representation of a reply cache entry.
@@ -77,8 +78,8 @@ enum {
 /* Checksum this amount of the request */
 #define RC_CSUMLEN		(256U)
 
-int	nfsd_reply_cache_init(void);
-void	nfsd_reply_cache_shutdown(void);
+int	nfsd_reply_cache_init(struct nfsd_net *);
+void	nfsd_reply_cache_shutdown(struct nfsd_net *);
 int	nfsd_cache_lookup(struct svc_rqst *);
 void	nfsd_cache_update(struct svc_rqst *, int, __be32 *);
 int	nfsd_reply_cache_stats_open(struct inode *, struct file *);
diff --git a/fs/nfsd/export.c b/fs/nfsd/export.c
index 802993d8912f..baa01956a5b3 100644
--- a/fs/nfsd/export.c
+++ b/fs/nfsd/export.c
@@ -570,13 +570,13 @@ static int svc_export_parse(struct cache_detail *cd, char *mesg, int mlen)
 		err = get_int(&mesg, &an_int);
 		if (err)
 			goto out3;
-		exp.ex_anon_uid= make_kuid(&init_user_ns, an_int);
+		exp.ex_anon_uid= make_kuid(current_user_ns(), an_int);
 
 		/* anon gid */
 		err = get_int(&mesg, &an_int);
 		if (err)
 			goto out3;
-		exp.ex_anon_gid= make_kgid(&init_user_ns, an_int);
+		exp.ex_anon_gid= make_kgid(current_user_ns(), an_int);
 
 		/* fsid */
 		err = get_int(&mesg, &an_int);
@@ -1170,15 +1170,17 @@ static void show_secinfo(struct seq_file *m, struct svc_export *exp)
 static void exp_flags(struct seq_file *m, int flag, int fsid,
 		kuid_t anonu, kgid_t anong, struct nfsd4_fs_locations *fsloc)
 {
+	struct user_namespace *userns = m->file->f_cred->user_ns;
+
 	show_expflags(m, flag, NFSEXP_ALLFLAGS);
 	if (flag & NFSEXP_FSID)
 		seq_printf(m, ",fsid=%d", fsid);
-	if (!uid_eq(anonu, make_kuid(&init_user_ns, (uid_t)-2)) &&
-	    !uid_eq(anonu, make_kuid(&init_user_ns, 0x10000-2)))
-		seq_printf(m, ",anonuid=%u", from_kuid(&init_user_ns, anonu));
-	if (!gid_eq(anong, make_kgid(&init_user_ns, (gid_t)-2)) &&
-	    !gid_eq(anong, make_kgid(&init_user_ns, 0x10000-2)))
-		seq_printf(m, ",anongid=%u", from_kgid(&init_user_ns, anong));
+	if (!uid_eq(anonu, make_kuid(userns, (uid_t)-2)) &&
+	    !uid_eq(anonu, make_kuid(userns, 0x10000-2)))
+		seq_printf(m, ",anonuid=%u", from_kuid_munged(userns, anonu));
+	if (!gid_eq(anong, make_kgid(userns, (gid_t)-2)) &&
+	    !gid_eq(anong, make_kgid(userns, 0x10000-2)))
+		seq_printf(m, ",anongid=%u", from_kgid_munged(userns, anong));
 	if (fsloc && fsloc->locations_count > 0) {
 		char *loctype = (fsloc->migrated) ? "refer" : "replicas";
 		int i;
diff --git a/fs/nfsd/fault_inject.c b/fs/nfsd/fault_inject.c
index 84831253203d..76bee0a0d308 100644
--- a/fs/nfsd/fault_inject.c
+++ b/fs/nfsd/fault_inject.c
@@ -127,24 +127,16 @@ static struct nfsd_fault_inject_op inject_ops[] = {
 	},
 };
 
-int nfsd_fault_inject_init(void)
+void nfsd_fault_inject_init(void)
 {
 	unsigned int i;
 	struct nfsd_fault_inject_op *op;
 	umode_t mode = S_IFREG | S_IRUSR | S_IWUSR;
 
 	debug_dir = debugfs_create_dir("nfsd", NULL);
-	if (!debug_dir)
-		goto fail;
 
 	for (i = 0; i < ARRAY_SIZE(inject_ops); i++) {
 		op = &inject_ops[i];
-		if (!debugfs_create_file(op->file, mode, debug_dir, op, &fops_nfsd))
-			goto fail;
+		debugfs_create_file(op->file, mode, debug_dir, op, &fops_nfsd);
 	}
-	return 0;
-
-fail:
-	nfsd_fault_inject_cleanup();
-	return -ENOMEM;
 }
diff --git a/fs/nfsd/netns.h b/fs/nfsd/netns.h
index 32cb8c027483..bdfe5bcb3dcd 100644
--- a/fs/nfsd/netns.h
+++ b/fs/nfsd/netns.h
@@ -1,21 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * per net namespace data structures for nfsd
  *
  * Copyright (C) 2012, Jeff Layton <jlayton@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  */
 
 #ifndef __NFSD_NETNS_H__
@@ -55,6 +42,11 @@ struct nfsd_net {
 	bool grace_ended;
 	time_t boot_time;
 
+	/* internal mount of the "nfsd" pseudofilesystem: */
+	struct vfsmount *nfsd_mnt;
+
+	struct dentry *nfsd_client_dir;
+
 	/*
 	 * reclaim_str_hashtbl[] holds known client info from previous reset/reboot
 	 * used in reboot/reset lease grace period processing
@@ -104,6 +96,9 @@ struct nfsd_net {
 	time_t nfsd4_grace;
 	bool somebody_reclaimed;
 
+	bool track_reclaim_completes;
+	atomic_t nr_reclaim_complete;
+
 	bool nfsd_net_up;
 	bool lockd_up;
 
@@ -116,6 +111,7 @@ struct nfsd_net {
 	 */
 	unsigned int max_connections;
 
+	u32 clientid_base;
 	u32 clientid_counter;
 	u32 clverifier_counter;
 
@@ -131,10 +127,56 @@ struct nfsd_net {
 	u32		s2s_cp_cl_id;
 	struct idr	s2s_cp_stateids;
 	spinlock_t	s2s_cp_lock;
+
+	/*
+	 * Version information
+	 */
+	bool *nfsd_versions;
+	bool *nfsd4_minorversions;
+
+	/*
+	 * Duplicate reply cache
+	 */
+	struct nfsd_drc_bucket   *drc_hashtbl;
+	struct kmem_cache        *drc_slab;
+
+	/* max number of entries allowed in the cache */
+	unsigned int             max_drc_entries;
+
+	/* number of significant bits in the hash value */
+	unsigned int             maskbits;
+	unsigned int             drc_hashsize;
+
+	/*
+	 * Stats and other tracking of on the duplicate reply cache.
+	 * These fields and the "rc" fields in nfsdstats are modified
+	 * with only the per-bucket cache lock, which isn't really safe
+	 * and should be fixed if we want the statistics to be
+	 * completely accurate.
+	 */
+
+	/* total number of entries */
+	atomic_t                 num_drc_entries;
+
+	/* cache misses due only to checksum comparison failures */
+	unsigned int             payload_misses;
+
+	/* amount of memory (in bytes) currently consumed by the DRC */
+	unsigned int             drc_mem_usage;
+
+	/* longest hash chain seen */
+	unsigned int             longest_chain;
+
+	/* size of cache when we saw the longest hash chain */
+	unsigned int             longest_chain_cachesize;
+
+	struct shrinker		nfsd_reply_cache_shrinker;
 };
 
 /* Simple check to find out if a given net was properly initialized */
 #define nfsd_netns_ready(nn) ((nn)->sessionid_hashtbl)
 
+extern void nfsd_netns_free_versions(struct nfsd_net *nn);
+
 extern unsigned int nfsd_net_id;
 #endif /* __NFSD_NETNS_H__ */
diff --git a/fs/nfsd/nfs3proc.c b/fs/nfsd/nfs3proc.c
index 9eb8086ea841..9bc32af4e2da 100644
--- a/fs/nfsd/nfs3proc.c
+++ b/fs/nfsd/nfs3proc.c
@@ -442,7 +442,9 @@ nfsd3_proc_readdir(struct svc_rqst *rqstp)
 	struct nfsd3_readdirargs *argp = rqstp->rq_argp;
 	struct nfsd3_readdirres  *resp = rqstp->rq_resp;
 	__be32		nfserr;
-	int		count;
+	int		count = 0;
+	struct page	**p;
+	caddr_t		page_addr = NULL;
 
 	dprintk("nfsd: READDIR(3)  %s %d bytes at %d\n",
 				SVCFH_fmt(&argp->fh),
@@ -462,9 +464,31 @@ nfsd3_proc_readdir(struct svc_rqst *rqstp)
 	nfserr = nfsd_readdir(rqstp, &resp->fh, (loff_t*) &argp->cookie, 
 					&resp->common, nfs3svc_encode_entry);
 	memcpy(resp->verf, argp->verf, 8);
-	resp->count = resp->buffer - argp->buffer;
-	if (resp->offset)
-		xdr_encode_hyper(resp->offset, argp->cookie);
+	count = 0;
+	for (p = rqstp->rq_respages + 1; p < rqstp->rq_next_page; p++) {
+		page_addr = page_address(*p);
+
+		if (((caddr_t)resp->buffer >= page_addr) &&
+		    ((caddr_t)resp->buffer < page_addr + PAGE_SIZE)) {
+			count += (caddr_t)resp->buffer - page_addr;
+			break;
+		}
+		count += PAGE_SIZE;
+	}
+	resp->count = count >> 2;
+	if (resp->offset) {
+		loff_t offset = argp->cookie;
+
+		if (unlikely(resp->offset1)) {
+			/* we ended up with offset on a page boundary */
+			*resp->offset = htonl(offset >> 32);
+			*resp->offset1 = htonl(offset & 0xffffffff);
+			resp->offset1 = NULL;
+		} else {
+			xdr_encode_hyper(resp->offset, offset);
+		}
+		resp->offset = NULL;
+	}
 
 	RETURN_STATUS(nfserr);
 }
@@ -533,6 +557,7 @@ nfsd3_proc_readdirplus(struct svc_rqst *rqstp)
 		} else {
 			xdr_encode_hyper(resp->offset, offset);
 		}
+		resp->offset = NULL;
 	}
 
 	RETURN_STATUS(nfserr);
@@ -576,7 +601,7 @@ nfsd3_proc_fsinfo(struct svc_rqst *rqstp)
 	resp->f_wtmax  = max_blocksize;
 	resp->f_wtpref = max_blocksize;
 	resp->f_wtmult = PAGE_SIZE;
-	resp->f_dtpref = PAGE_SIZE;
+	resp->f_dtpref = max_blocksize;
 	resp->f_maxfilesize = ~(u32) 0;
 	resp->f_properties = NFS3_FSF_DEFAULT;
 
diff --git a/fs/nfsd/nfs3xdr.c b/fs/nfsd/nfs3xdr.c
index 9b973f4f7d01..fcf31822c74c 100644
--- a/fs/nfsd/nfs3xdr.c
+++ b/fs/nfsd/nfs3xdr.c
@@ -96,7 +96,7 @@ decode_filename(__be32 *p, char **namp, unsigned int *lenp)
 }
 
 static __be32 *
-decode_sattr3(__be32 *p, struct iattr *iap)
+decode_sattr3(__be32 *p, struct iattr *iap, struct user_namespace *userns)
 {
 	u32	tmp;
 
@@ -107,12 +107,12 @@ decode_sattr3(__be32 *p, struct iattr *iap)
 		iap->ia_mode = ntohl(*p++);
 	}
 	if (*p++) {
-		iap->ia_uid = make_kuid(&init_user_ns, ntohl(*p++));
+		iap->ia_uid = make_kuid(userns, ntohl(*p++));
 		if (uid_valid(iap->ia_uid))
 			iap->ia_valid |= ATTR_UID;
 	}
 	if (*p++) {
-		iap->ia_gid = make_kgid(&init_user_ns, ntohl(*p++));
+		iap->ia_gid = make_kgid(userns, ntohl(*p++));
 		if (gid_valid(iap->ia_gid))
 			iap->ia_valid |= ATTR_GID;
 	}
@@ -165,12 +165,13 @@ static __be32 *
 encode_fattr3(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
 	      struct kstat *stat)
 {
+	struct user_namespace *userns = nfsd_user_namespace(rqstp);
 	struct timespec ts;
 	*p++ = htonl(nfs3_ftypes[(stat->mode & S_IFMT) >> 12]);
 	*p++ = htonl((u32) (stat->mode & S_IALLUGO));
 	*p++ = htonl((u32) stat->nlink);
-	*p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid));
-	*p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid));
+	*p++ = htonl((u32) from_kuid_munged(userns, stat->uid));
+	*p++ = htonl((u32) from_kgid_munged(userns, stat->gid));
 	if (S_ISLNK(stat->mode) && stat->size > NFS3_MAXPATHLEN) {
 		p = xdr_encode_hyper(p, (u64) NFS3_MAXPATHLEN);
 	} else {
@@ -325,7 +326,7 @@ nfs3svc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
 	p = decode_fh(p, &args->fh);
 	if (!p)
 		return 0;
-	p = decode_sattr3(p, &args->attrs);
+	p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
 
 	if ((args->check_guard = ntohl(*p++)) != 0) { 
 		struct timespec time; 
@@ -455,7 +456,7 @@ nfs3svc_decode_createargs(struct svc_rqst *rqstp, __be32 *p)
 	switch (args->createmode = ntohl(*p++)) {
 	case NFS3_CREATE_UNCHECKED:
 	case NFS3_CREATE_GUARDED:
-		p = decode_sattr3(p, &args->attrs);
+		p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
 		break;
 	case NFS3_CREATE_EXCLUSIVE:
 		args->verf = p;
@@ -476,7 +477,7 @@ nfs3svc_decode_mkdirargs(struct svc_rqst *rqstp, __be32 *p)
 	if (!(p = decode_fh(p, &args->fh)) ||
 	    !(p = decode_filename(p, &args->name, &args->len)))
 		return 0;
-	p = decode_sattr3(p, &args->attrs);
+	p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
 
 	return xdr_argsize_check(rqstp, p);
 }
@@ -491,7 +492,7 @@ nfs3svc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p)
 	if (!(p = decode_fh(p, &args->ffh)) ||
 	    !(p = decode_filename(p, &args->fname, &args->flen)))
 		return 0;
-	p = decode_sattr3(p, &args->attrs);
+	p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
 
 	args->tlen = ntohl(*p++);
 
@@ -519,7 +520,7 @@ nfs3svc_decode_mknodargs(struct svc_rqst *rqstp, __be32 *p)
 
 	if (args->ftype == NF3BLK  || args->ftype == NF3CHR
 	 || args->ftype == NF3SOCK || args->ftype == NF3FIFO)
-		p = decode_sattr3(p, &args->attrs);
+		p = decode_sattr3(p, &args->attrs, nfsd_user_namespace(rqstp));
 
 	if (args->ftype == NF3BLK || args->ftype == NF3CHR) {
 		args->major = ntohl(*p++);
@@ -573,6 +574,9 @@ int
 nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
 {
 	struct nfsd3_readdirargs *args = rqstp->rq_argp;
+	int len;
+	u32 max_blocksize = svc_max_payload(rqstp);
+
 	p = decode_fh(p, &args->fh);
 	if (!p)
 		return 0;
@@ -580,8 +584,14 @@ nfs3svc_decode_readdirargs(struct svc_rqst *rqstp, __be32 *p)
 	args->verf   = p; p += 2;
 	args->dircount = ~0;
 	args->count  = ntohl(*p++);
-	args->count  = min_t(u32, args->count, PAGE_SIZE);
-	args->buffer = page_address(*(rqstp->rq_next_page++));
+	len = args->count  = min_t(u32, args->count, max_blocksize);
+
+	while (len > 0) {
+		struct page *p = *(rqstp->rq_next_page++);
+		if (!args->buffer)
+			args->buffer = page_address(p);
+		len -= PAGE_SIZE;
+	}
 
 	return xdr_argsize_check(rqstp, p);
 }
@@ -921,6 +931,7 @@ encode_entry(struct readdir_cd *ccd, const char *name, int namlen,
 		} else {
 			xdr_encode_hyper(cd->offset, offset64);
 		}
+		cd->offset = NULL;
 	}
 
 	/*
diff --git a/fs/nfsd/nfs4callback.c b/fs/nfsd/nfs4callback.c
index c74e4538d0eb..397eb7820929 100644
--- a/fs/nfsd/nfs4callback.c
+++ b/fs/nfsd/nfs4callback.c
@@ -60,16 +60,6 @@ struct nfs4_cb_compound_hdr {
 	int		status;
 };
 
-/*
- * Handle decode buffer overflows out-of-line.
- */
-static void print_overflow_msg(const char *func, const struct xdr_stream *xdr)
-{
-	dprintk("NFS: %s prematurely hit the end of our receive buffer. "
-		"Remaining buffer length is %tu words.\n",
-		func, xdr->end - xdr->p);
-}
-
 static __be32 *xdr_encode_empty_array(__be32 *p)
 {
 	*p++ = xdr_zero;
@@ -240,7 +230,6 @@ static int decode_cb_op_status(struct xdr_stream *xdr,
 	*status = nfs_cb_stat_to_errno(be32_to_cpup(p));
 	return 0;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 out_unexpected:
 	dprintk("NFSD: Callback server returned operation %d but "
@@ -309,7 +298,6 @@ static int decode_cb_compound4res(struct xdr_stream *xdr,
 	hdr->nops = be32_to_cpup(p);
 	return 0;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	return -EIO;
 }
 
@@ -437,7 +425,6 @@ out:
 	cb->cb_seq_status = status;
 	return status;
 out_overflow:
-	print_overflow_msg(__func__, xdr);
 	status = -EIO;
 	goto out;
 }
@@ -881,6 +868,7 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
 		.program	= &cb_program,
 		.version	= 1,
 		.flags		= (RPC_CLNT_CREATE_NOPING | RPC_CLNT_CREATE_QUIET),
+		.cred		= current_cred(),
 	};
 	struct rpc_clnt *client;
 	const struct cred *cred;
@@ -913,9 +901,9 @@ static int setup_callback_client(struct nfs4_client *clp, struct nfs4_cb_conn *c
 		return PTR_ERR(client);
 	}
 	cred = get_backchannel_cred(clp, client, ses);
-	if (IS_ERR(cred)) {
+	if (!cred) {
 		rpc_shutdown_client(client);
-		return PTR_ERR(cred);
+		return -ENOMEM;
 	}
 	clp->cl_cb_client = client;
 	clp->cl_cb_cred = cred;
@@ -1023,8 +1011,9 @@ static void nfsd4_cb_prepare(struct rpc_task *task, void *calldata)
 	cb->cb_seq_status = 1;
 	cb->cb_status = 0;
 	if (minorversion) {
-		if (!nfsd41_cb_get_slot(clp, task))
+		if (!cb->cb_holds_slot && !nfsd41_cb_get_slot(clp, task))
 			return;
+		cb->cb_holds_slot = true;
 	}
 	rpc_call_start(task);
 }
@@ -1045,12 +1034,15 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback
 		 * the submission code will error out, so we don't need to
 		 * handle that case here.
 		 */
-		if (task->tk_flags & RPC_TASK_KILLED)
+		if (RPC_SIGNALLED(task))
 			goto need_restart;
 
 		return true;
 	}
 
+	if (!cb->cb_holds_slot)
+		goto need_restart;
+
 	switch (cb->cb_seq_status) {
 	case 0:
 		/*
@@ -1089,12 +1081,13 @@ static bool nfsd4_cb_sequence_done(struct rpc_task *task, struct nfsd4_callback
 			cb->cb_seq_status);
 	}
 
+	cb->cb_holds_slot = false;
 	clear_bit(0, &clp->cl_cb_slot_busy);
 	rpc_wake_up_next(&clp->cl_cb_waitq);
 	dprintk("%s: freed slot, new seqid=%d\n", __func__,
 		clp->cl_cb_session->se_cb_seq_nr);
 
-	if (task->tk_flags & RPC_TASK_KILLED)
+	if (RPC_SIGNALLED(task))
 		goto need_restart;
 out:
 	return ret;
@@ -1130,10 +1123,11 @@ static void nfsd4_cb_done(struct rpc_task *task, void *calldata)
 		rpc_restart_call_prepare(task);
 		return;
 	case 1:
-		break;
-	case -1:
-		/* Network partition? */
-		nfsd4_mark_cb_down(clp, task->tk_status);
+		switch (task->tk_status) {
+		case -EIO:
+		case -ETIMEDOUT:
+			nfsd4_mark_cb_down(clp, task->tk_status);
+		}
 		break;
 	default:
 		BUG();
@@ -1296,6 +1290,7 @@ void nfsd4_init_cb(struct nfsd4_callback *cb, struct nfs4_client *clp,
 	cb->cb_seq_status = 1;
 	cb->cb_status = 0;
 	cb->cb_need_restart = false;
+	cb->cb_holds_slot = false;
 }
 
 void nfsd4_run_cb(struct nfsd4_callback *cb)
diff --git a/fs/nfsd/nfs4idmap.c b/fs/nfsd/nfs4idmap.c
index bf137fec33ff..d1f285245af8 100644
--- a/fs/nfsd/nfs4idmap.c
+++ b/fs/nfsd/nfs4idmap.c
@@ -83,7 +83,7 @@ ent_init(struct cache_head *cnew, struct cache_head *citm)
 	new->type = itm->type;
 
 	strlcpy(new->name, itm->name, sizeof(new->name));
-	strlcpy(new->authname, itm->authname, sizeof(new->name));
+	strlcpy(new->authname, itm->authname, sizeof(new->authname));
 }
 
 static void
@@ -634,7 +634,7 @@ nfsd_map_name_to_uid(struct svc_rqst *rqstp, const char *name, size_t namelen,
 		return nfserr_inval;
 
 	status = do_name_to_id(rqstp, IDMAP_TYPE_USER, name, namelen, &id);
-	*uid = make_kuid(&init_user_ns, id);
+	*uid = make_kuid(nfsd_user_namespace(rqstp), id);
 	if (!uid_valid(*uid))
 		status = nfserr_badowner;
 	return status;
@@ -651,7 +651,7 @@ nfsd_map_name_to_gid(struct svc_rqst *rqstp, const char *name, size_t namelen,
 		return nfserr_inval;
 
 	status = do_name_to_id(rqstp, IDMAP_TYPE_GROUP, name, namelen, &id);
-	*gid = make_kgid(&init_user_ns, id);
+	*gid = make_kgid(nfsd_user_namespace(rqstp), id);
 	if (!gid_valid(*gid))
 		status = nfserr_badowner;
 	return status;
@@ -660,13 +660,13 @@ nfsd_map_name_to_gid(struct svc_rqst *rqstp, const char *name, size_t namelen,
 __be32 nfsd4_encode_user(struct xdr_stream *xdr, struct svc_rqst *rqstp,
 			 kuid_t uid)
 {
-	u32 id = from_kuid(&init_user_ns, uid);
+	u32 id = from_kuid_munged(nfsd_user_namespace(rqstp), uid);
 	return encode_name_from_id(xdr, rqstp, IDMAP_TYPE_USER, id);
 }
 
 __be32 nfsd4_encode_group(struct xdr_stream *xdr, struct svc_rqst *rqstp,
 			  kgid_t gid)
 {
-	u32 id = from_kgid(&init_user_ns, gid);
+	u32 id = from_kgid_munged(nfsd_user_namespace(rqstp), gid);
 	return encode_name_from_id(xdr, rqstp, IDMAP_TYPE_GROUP, id);
 }
diff --git a/fs/nfsd/nfs4layouts.c b/fs/nfsd/nfs4layouts.c
index 44517fb5c0de..a79e24b79095 100644
--- a/fs/nfsd/nfs4layouts.c
+++ b/fs/nfsd/nfs4layouts.c
@@ -693,7 +693,7 @@ nfsd4_cb_layout_done(struct nfsd4_callback *cb, struct rpc_task *task)
 			ops->fence_client(ls);
 		else
 			nfsd4_cb_layout_fail(ls);
-		return -1;
+		return 1;
 	case -NFS4ERR_NOMATCHING_LAYOUT:
 		trace_nfsd_layout_recall_done(&ls->ls_stid.sc_stateid);
 		task->tk_status = 0;
diff --git a/fs/nfsd/nfs4proc.c b/fs/nfsd/nfs4proc.c
index 0cfd257ffdaf..8beda999e134 100644
--- a/fs/nfsd/nfs4proc.c
+++ b/fs/nfsd/nfs4proc.c
@@ -427,6 +427,7 @@ nfsd4_open(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 				goto out;
 			open->op_openowner->oo_flags |= NFS4_OO_CONFIRMED;
 			reclaim = true;
+			/* fall through */
 		case NFS4_OPEN_CLAIM_FH:
 		case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
 			status = do_open_fhandle(rqstp, cstate, open);
@@ -1926,6 +1927,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
 	struct nfsd4_compound_state *cstate = &resp->cstate;
 	struct svc_fh *current_fh = &cstate->current_fh;
 	struct svc_fh *save_fh = &cstate->save_fh;
+	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
 	__be32		status;
 
 	svcxdr_init_encode(rqstp, resp);
@@ -1948,7 +1950,7 @@ nfsd4_proc_compound(struct svc_rqst *rqstp)
 	 * According to RFC3010, this takes precedence over all other errors.
 	 */
 	status = nfserr_minor_vers_mismatch;
-	if (nfsd_minorversion(args->minorversion, NFSD_TEST) <= 0)
+	if (nfsd_minorversion(nn, args->minorversion, NFSD_TEST) <= 0)
 		goto out;
 	status = nfserr_resource;
 	if (args->opcnt > NFSD_MAX_OPS_PER_COMPOUND)
diff --git a/fs/nfsd/nfs4recover.c b/fs/nfsd/nfs4recover.c
index 5188f9f70c78..87679557d0d6 100644
--- a/fs/nfsd/nfs4recover.c
+++ b/fs/nfsd/nfs4recover.c
@@ -126,7 +126,6 @@ nfs4_make_rec_clidname(char *dname, const struct xdr_netobj *clname)
 		SHASH_DESC_ON_STACK(desc, tfm);
 
 		desc->tfm = tfm;
-		desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
 		status = crypto_shash_digest(desc, clname->data, clname->len,
 					     cksum.data);
@@ -170,12 +169,33 @@ legacy_recdir_name_error(struct nfs4_client *clp, int error)
 }
 
 static void
+__nfsd4_create_reclaim_record_grace(struct nfs4_client *clp,
+		const char *dname, int len, struct nfsd_net *nn)
+{
+	struct xdr_netobj name;
+	struct nfs4_client_reclaim *crp;
+
+	name.data = kmemdup(dname, len, GFP_KERNEL);
+	if (!name.data) {
+		dprintk("%s: failed to allocate memory for name.data!\n",
+			__func__);
+		return;
+	}
+	name.len = len;
+	crp = nfs4_client_to_reclaim(name, nn);
+	if (!crp) {
+		kfree(name.data);
+		return;
+	}
+	crp->cr_clp = clp;
+}
+
+static void
 nfsd4_create_clid_dir(struct nfs4_client *clp)
 {
 	const struct cred *original_cred;
 	char dname[HEXDIR_LEN];
 	struct dentry *dir, *dentry;
-	struct nfs4_client_reclaim *crp;
 	int status;
 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
 
@@ -221,11 +241,9 @@ out_put:
 out_unlock:
 	inode_unlock(d_inode(dir));
 	if (status == 0) {
-		if (nn->in_grace) {
-			crp = nfs4_client_to_reclaim(dname, nn);
-			if (crp)
-				crp->cr_clp = clp;
-		}
+		if (nn->in_grace)
+			__nfsd4_create_reclaim_record_grace(clp, dname,
+					HEXDIR_LEN, nn);
 		vfs_fsync(nn->rec_file, 0);
 	} else {
 		printk(KERN_ERR "NFSD: failed to write recovery record"
@@ -346,10 +364,29 @@ out_unlock:
 }
 
 static void
+__nfsd4_remove_reclaim_record_grace(const char *dname, int len,
+		struct nfsd_net *nn)
+{
+	struct xdr_netobj name;
+	struct nfs4_client_reclaim *crp;
+
+	name.data = kmemdup(dname, len, GFP_KERNEL);
+	if (!name.data) {
+		dprintk("%s: failed to allocate memory for name.data!\n",
+			__func__);
+		return;
+	}
+	name.len = len;
+	crp = nfsd4_find_reclaim_client(name, nn);
+	kfree(name.data);
+	if (crp)
+		nfs4_remove_reclaim_record(crp, nn);
+}
+
+static void
 nfsd4_remove_clid_dir(struct nfs4_client *clp)
 {
 	const struct cred *original_cred;
-	struct nfs4_client_reclaim *crp;
 	char dname[HEXDIR_LEN];
 	int status;
 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
@@ -374,12 +411,9 @@ nfsd4_remove_clid_dir(struct nfs4_client *clp)
 	nfs4_reset_creds(original_cred);
 	if (status == 0) {
 		vfs_fsync(nn->rec_file, 0);
-		if (nn->in_grace) {
-			/* remove reclaim record */
-			crp = nfsd4_find_reclaim_client(dname, nn);
-			if (crp)
-				nfs4_remove_reclaim_record(crp, nn);
-		}
+		if (nn->in_grace)
+			__nfsd4_remove_reclaim_record_grace(dname,
+					HEXDIR_LEN, nn);
 	}
 out_drop_write:
 	mnt_drop_write_file(nn->rec_file);
@@ -393,14 +427,31 @@ static int
 purge_old(struct dentry *parent, struct dentry *child, struct nfsd_net *nn)
 {
 	int status;
+	struct xdr_netobj name;
 
-	if (nfs4_has_reclaimed_state(child->d_name.name, nn))
+	if (child->d_name.len != HEXDIR_LEN - 1) {
+		printk("%s: illegal name %pd in recovery directory\n",
+				__func__, child);
+		/* Keep trying; maybe the others are OK: */
 		return 0;
+	}
+	name.data = kmemdup_nul(child->d_name.name, child->d_name.len, GFP_KERNEL);
+	if (!name.data) {
+		dprintk("%s: failed to allocate memory for name.data!\n",
+			__func__);
+		goto out;
+	}
+	name.len = HEXDIR_LEN;
+	if (nfs4_has_reclaimed_state(name, nn))
+		goto out_free;
 
 	status = vfs_rmdir(d_inode(parent), child);
 	if (status)
 		printk("failed to remove client recovery directory %pd\n",
 				child);
+out_free:
+	kfree(name.data);
+out:
 	/* Keep trying, success or failure: */
 	return 0;
 }
@@ -430,13 +481,24 @@ out:
 static int
 load_recdir(struct dentry *parent, struct dentry *child, struct nfsd_net *nn)
 {
+	struct xdr_netobj name;
+
 	if (child->d_name.len != HEXDIR_LEN - 1) {
-		printk("nfsd4: illegal name %pd in recovery directory\n",
-				child);
+		printk("%s: illegal name %pd in recovery directory\n",
+				__func__, child);
 		/* Keep trying; maybe the others are OK: */
 		return 0;
 	}
-	nfs4_client_to_reclaim(child->d_name.name, nn);
+	name.data = kmemdup_nul(child->d_name.name, child->d_name.len, GFP_KERNEL);
+	if (!name.data) {
+		dprintk("%s: failed to allocate memory for name.data!\n",
+			__func__);
+		goto out;
+	}
+	name.len = HEXDIR_LEN;
+	if (!nfs4_client_to_reclaim(name, nn))
+		kfree(name.data);
+out:
 	return 0;
 }
 
@@ -565,6 +627,7 @@ nfsd4_legacy_tracking_init(struct net *net)
 	status = nfsd4_load_reboot_recovery_data(net);
 	if (status)
 		goto err;
+	printk("NFSD: Using legacy client tracking operations.\n");
 	return 0;
 
 err:
@@ -616,6 +679,7 @@ nfsd4_check_legacy_client(struct nfs4_client *clp)
 	char dname[HEXDIR_LEN];
 	struct nfs4_client_reclaim *crp;
 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+	struct xdr_netobj name;
 
 	/* did we already find that this client is stable? */
 	if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
@@ -628,13 +692,22 @@ nfsd4_check_legacy_client(struct nfs4_client *clp)
 	}
 
 	/* look for it in the reclaim hashtable otherwise */
-	crp = nfsd4_find_reclaim_client(dname, nn);
+	name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL);
+	if (!name.data) {
+		dprintk("%s: failed to allocate memory for name.data!\n",
+			__func__);
+		goto out_enoent;
+	}
+	name.len = HEXDIR_LEN;
+	crp = nfsd4_find_reclaim_client(name, nn);
+	kfree(name.data);
 	if (crp) {
 		set_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags);
 		crp->cr_clp = clp;
 		return 0;
 	}
 
+out_enoent:
 	return -ENOENT;
 }
 
@@ -657,6 +730,7 @@ struct cld_net {
 	spinlock_t		 cn_lock;
 	struct list_head	 cn_list;
 	unsigned int		 cn_xid;
+	bool			 cn_has_legacy;
 };
 
 struct cld_upcall {
@@ -707,6 +781,40 @@ cld_pipe_upcall(struct rpc_pipe *pipe, struct cld_msg *cmsg)
 }
 
 static ssize_t
+__cld_pipe_inprogress_downcall(const struct cld_msg __user *cmsg,
+		struct nfsd_net *nn)
+{
+	uint8_t cmd;
+	struct xdr_netobj name;
+	uint16_t namelen;
+	struct cld_net *cn = nn->cld_net;
+
+	if (get_user(cmd, &cmsg->cm_cmd)) {
+		dprintk("%s: error when copying cmd from userspace", __func__);
+		return -EFAULT;
+	}
+	if (cmd == Cld_GraceStart) {
+		if (get_user(namelen, &cmsg->cm_u.cm_name.cn_len))
+			return -EFAULT;
+		name.data = memdup_user(&cmsg->cm_u.cm_name.cn_id, namelen);
+		if (IS_ERR_OR_NULL(name.data))
+			return -EFAULT;
+		name.len = namelen;
+		if (name.len > 5 && memcmp(name.data, "hash:", 5) == 0) {
+			name.len = name.len - 5;
+			memmove(name.data, name.data + 5, name.len);
+			cn->cn_has_legacy = true;
+		}
+		if (!nfs4_client_to_reclaim(name, nn)) {
+			kfree(name.data);
+			return -EFAULT;
+		}
+		return sizeof(*cmsg);
+	}
+	return -EFAULT;
+}
+
+static ssize_t
 cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 {
 	struct cld_upcall *tmp, *cup;
@@ -715,6 +823,7 @@ cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 	struct nfsd_net *nn = net_generic(file_inode(filp)->i_sb->s_fs_info,
 						nfsd_net_id);
 	struct cld_net *cn = nn->cld_net;
+	int16_t status;
 
 	if (mlen != sizeof(*cmsg)) {
 		dprintk("%s: got %zu bytes, expected %zu\n", __func__, mlen,
@@ -728,13 +837,24 @@ cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 		return -EFAULT;
 	}
 
+	/*
+	 * copy the status so we know whether to remove the upcall from the
+	 * list (for -EINPROGRESS, we just want to make sure the xid is
+	 * valid, not remove the upcall from the list)
+	 */
+	if (get_user(status, &cmsg->cm_status)) {
+		dprintk("%s: error when copying status from userspace", __func__);
+		return -EFAULT;
+	}
+
 	/* walk the list and find corresponding xid */
 	cup = NULL;
 	spin_lock(&cn->cn_lock);
 	list_for_each_entry(tmp, &cn->cn_list, cu_list) {
 		if (get_unaligned(&tmp->cu_msg.cm_xid) == xid) {
 			cup = tmp;
-			list_del_init(&cup->cu_list);
+			if (status != -EINPROGRESS)
+				list_del_init(&cup->cu_list);
 			break;
 		}
 	}
@@ -746,6 +866,9 @@ cld_pipe_downcall(struct file *filp, const char __user *src, size_t mlen)
 		return -EINVAL;
 	}
 
+	if (status == -EINPROGRESS)
+		return __cld_pipe_inprogress_downcall(cmsg, nn);
+
 	if (copy_from_user(&cup->cu_msg, src, mlen) != 0)
 		return -EFAULT;
 
@@ -821,7 +944,7 @@ nfsd4_cld_unregister_net(struct net *net, struct rpc_pipe *pipe)
 
 /* Initialize rpc_pipefs pipe for communication with client tracking daemon */
 static int
-nfsd4_init_cld_pipe(struct net *net)
+__nfsd4_init_cld_pipe(struct net *net)
 {
 	int ret;
 	struct dentry *dentry;
@@ -852,6 +975,7 @@ nfsd4_init_cld_pipe(struct net *net)
 	}
 
 	cn->cn_pipe->dentry = dentry;
+	cn->cn_has_legacy = false;
 	nn->cld_net = cn;
 	return 0;
 
@@ -864,6 +988,17 @@ err:
 	return ret;
 }
 
+static int
+nfsd4_init_cld_pipe(struct net *net)
+{
+	int status;
+
+	status = __nfsd4_init_cld_pipe(net);
+	if (!status)
+		printk("NFSD: Using old nfsdcld client tracking operations.\n");
+	return status;
+}
+
 static void
 nfsd4_remove_cld_pipe(struct net *net)
 {
@@ -992,9 +1127,14 @@ out_err:
 				"record from stable storage: %d\n", ret);
 }
 
-/* Check for presence of a record, and update its timestamp */
+/*
+ * For older nfsdcld's that do not allow us to "slurp" the clients
+ * from the tracking database during startup.
+ *
+ * Check for presence of a record, and update its timestamp
+ */
 static int
-nfsd4_cld_check(struct nfs4_client *clp)
+nfsd4_cld_check_v0(struct nfs4_client *clp)
 {
 	int ret;
 	struct cld_upcall *cup;
@@ -1027,8 +1167,84 @@ nfsd4_cld_check(struct nfs4_client *clp)
 	return ret;
 }
 
+/*
+ * For newer nfsdcld's that allow us to "slurp" the clients
+ * from the tracking database during startup.
+ *
+ * Check for presence of a record in the reclaim_str_hashtbl
+ */
+static int
+nfsd4_cld_check(struct nfs4_client *clp)
+{
+	struct nfs4_client_reclaim *crp;
+	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+	struct cld_net *cn = nn->cld_net;
+	int status;
+	char dname[HEXDIR_LEN];
+	struct xdr_netobj name;
+
+	/* did we already find that this client is stable? */
+	if (test_bit(NFSD4_CLIENT_STABLE, &clp->cl_flags))
+		return 0;
+
+	/* look for it in the reclaim hashtable otherwise */
+	crp = nfsd4_find_reclaim_client(clp->cl_name, nn);
+	if (crp)
+		goto found;
+
+	if (cn->cn_has_legacy) {
+		status = nfs4_make_rec_clidname(dname, &clp->cl_name);
+		if (status)
+			return -ENOENT;
+
+		name.data = kmemdup(dname, HEXDIR_LEN, GFP_KERNEL);
+		if (!name.data) {
+			dprintk("%s: failed to allocate memory for name.data!\n",
+				__func__);
+			return -ENOENT;
+		}
+		name.len = HEXDIR_LEN;
+		crp = nfsd4_find_reclaim_client(name, nn);
+		kfree(name.data);
+		if (crp)
+			goto found;
+
+	}
+	return -ENOENT;
+found:
+	crp->cr_clp = clp;
+	return 0;
+}
+
+static int
+nfsd4_cld_grace_start(struct nfsd_net *nn)
+{
+	int ret;
+	struct cld_upcall *cup;
+	struct cld_net *cn = nn->cld_net;
+
+	cup = alloc_cld_upcall(cn);
+	if (!cup) {
+		ret = -ENOMEM;
+		goto out_err;
+	}
+
+	cup->cu_msg.cm_cmd = Cld_GraceStart;
+	ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_msg);
+	if (!ret)
+		ret = cup->cu_msg.cm_status;
+
+	free_cld_upcall(cup);
+out_err:
+	if (ret)
+		dprintk("%s: Unable to get clients from userspace: %d\n",
+			__func__, ret);
+	return ret;
+}
+
+/* For older nfsdcld's that need cm_gracetime */
 static void
-nfsd4_cld_grace_done(struct nfsd_net *nn)
+nfsd4_cld_grace_done_v0(struct nfsd_net *nn)
 {
 	int ret;
 	struct cld_upcall *cup;
@@ -1052,11 +1268,149 @@ out_err:
 		printk(KERN_ERR "NFSD: Unable to end grace period: %d\n", ret);
 }
 
-static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops = {
+/*
+ * For newer nfsdcld's that do not need cm_gracetime.  We also need to call
+ * nfs4_release_reclaim() to clear out the reclaim_str_hashtbl.
+ */
+static void
+nfsd4_cld_grace_done(struct nfsd_net *nn)
+{
+	int ret;
+	struct cld_upcall *cup;
+	struct cld_net *cn = nn->cld_net;
+
+	cup = alloc_cld_upcall(cn);
+	if (!cup) {
+		ret = -ENOMEM;
+		goto out_err;
+	}
+
+	cup->cu_msg.cm_cmd = Cld_GraceDone;
+	ret = cld_pipe_upcall(cn->cn_pipe, &cup->cu_msg);
+	if (!ret)
+		ret = cup->cu_msg.cm_status;
+
+	free_cld_upcall(cup);
+out_err:
+	nfs4_release_reclaim(nn);
+	if (ret)
+		printk(KERN_ERR "NFSD: Unable to end grace period: %d\n", ret);
+}
+
+static int
+nfs4_cld_state_init(struct net *net)
+{
+	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+	int i;
+
+	nn->reclaim_str_hashtbl = kmalloc_array(CLIENT_HASH_SIZE,
+						sizeof(struct list_head),
+						GFP_KERNEL);
+	if (!nn->reclaim_str_hashtbl)
+		return -ENOMEM;
+
+	for (i = 0; i < CLIENT_HASH_SIZE; i++)
+		INIT_LIST_HEAD(&nn->reclaim_str_hashtbl[i]);
+	nn->reclaim_str_hashtbl_size = 0;
+	nn->track_reclaim_completes = true;
+	atomic_set(&nn->nr_reclaim_complete, 0);
+
+	return 0;
+}
+
+static void
+nfs4_cld_state_shutdown(struct net *net)
+{
+	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+	nn->track_reclaim_completes = false;
+	kfree(nn->reclaim_str_hashtbl);
+}
+
+static bool
+cld_running(struct nfsd_net *nn)
+{
+	struct cld_net *cn = nn->cld_net;
+	struct rpc_pipe *pipe = cn->cn_pipe;
+
+	return pipe->nreaders || pipe->nwriters;
+}
+
+static int
+nfsd4_cld_tracking_init(struct net *net)
+{
+	int status;
+	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+	bool running;
+	int retries = 10;
+
+	status = nfs4_cld_state_init(net);
+	if (status)
+		return status;
+
+	status = __nfsd4_init_cld_pipe(net);
+	if (status)
+		goto err_shutdown;
+
+	/*
+	 * rpc pipe upcalls take 30 seconds to time out, so we don't want to
+	 * queue an upcall unless we know that nfsdcld is running (because we
+	 * want this to fail fast so that nfsd4_client_tracking_init() can try
+	 * the next client tracking method).  nfsdcld should already be running
+	 * before nfsd is started, so the wait here is for nfsdcld to open the
+	 * pipefs file we just created.
+	 */
+	while (!(running = cld_running(nn)) && retries--)
+		msleep(100);
+
+	if (!running) {
+		status = -ETIMEDOUT;
+		goto err_remove;
+	}
+
+	status = nfsd4_cld_grace_start(nn);
+	if (status) {
+		if (status == -EOPNOTSUPP)
+			printk(KERN_WARNING "NFSD: Please upgrade nfsdcld.\n");
+		nfs4_release_reclaim(nn);
+		goto err_remove;
+	} else
+		printk("NFSD: Using nfsdcld client tracking operations.\n");
+	return 0;
+
+err_remove:
+	nfsd4_remove_cld_pipe(net);
+err_shutdown:
+	nfs4_cld_state_shutdown(net);
+	return status;
+}
+
+static void
+nfsd4_cld_tracking_exit(struct net *net)
+{
+	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+	nfs4_release_reclaim(nn);
+	nfsd4_remove_cld_pipe(net);
+	nfs4_cld_state_shutdown(net);
+}
+
+/* For older nfsdcld's */
+static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops_v0 = {
 	.init		= nfsd4_init_cld_pipe,
 	.exit		= nfsd4_remove_cld_pipe,
 	.create		= nfsd4_cld_create,
 	.remove		= nfsd4_cld_remove,
+	.check		= nfsd4_cld_check_v0,
+	.grace_done	= nfsd4_cld_grace_done_v0,
+};
+
+/* For newer nfsdcld's */
+static const struct nfsd4_client_tracking_ops nfsd4_cld_tracking_ops = {
+	.init		= nfsd4_cld_tracking_init,
+	.exit		= nfsd4_cld_tracking_exit,
+	.create		= nfsd4_cld_create,
+	.remove		= nfsd4_cld_remove,
 	.check		= nfsd4_cld_check,
 	.grace_done	= nfsd4_cld_grace_done,
 };
@@ -1268,6 +1622,8 @@ nfsd4_umh_cltrack_init(struct net *net)
 
 	ret = nfsd4_umh_cltrack_upcall("init", NULL, grace_start, NULL);
 	kfree(grace_start);
+	if (!ret)
+		printk("NFSD: Using UMH upcall client tracking operations.\n");
 	return ret;
 }
 
@@ -1417,9 +1773,20 @@ nfsd4_client_tracking_init(struct net *net)
 	if (nn->client_tracking_ops)
 		goto do_init;
 
+	/* First, try to use nfsdcld */
+	nn->client_tracking_ops = &nfsd4_cld_tracking_ops;
+	status = nn->client_tracking_ops->init(net);
+	if (!status)
+		return status;
+	if (status != -ETIMEDOUT) {
+		nn->client_tracking_ops = &nfsd4_cld_tracking_ops_v0;
+		status = nn->client_tracking_ops->init(net);
+		if (!status)
+			return status;
+	}
+
 	/*
-	 * First, try a UMH upcall. It should succeed or fail quickly, so
-	 * there's little harm in trying that first.
+	 * Next, try the UMH upcall.
 	 */
 	nn->client_tracking_ops = &nfsd4_umh_tracking_ops;
 	status = nn->client_tracking_ops->init(net);
@@ -1427,25 +1794,23 @@ nfsd4_client_tracking_init(struct net *net)
 		return status;
 
 	/*
-	 * See if the recoverydir exists and is a directory. If it is,
-	 * then use the legacy ops.
+	 * Finally, See if the recoverydir exists and is a directory.
+	 * If it is, then use the legacy ops.
 	 */
 	nn->client_tracking_ops = &nfsd4_legacy_tracking_ops;
 	status = kern_path(nfs4_recoverydir(), LOOKUP_FOLLOW, &path);
 	if (!status) {
 		status = d_is_dir(path.dentry);
 		path_put(&path);
-		if (status)
-			goto do_init;
+		if (!status) {
+			status = -EINVAL;
+			goto out;
+		}
 	}
 
-	/* Finally, try to use nfsdcld */
-	nn->client_tracking_ops = &nfsd4_cld_tracking_ops;
-	printk(KERN_WARNING "NFSD: the nfsdcld client tracking upcall will be "
-			"removed in 3.10. Please transition to using "
-			"nfsdcltrack.\n");
 do_init:
 	status = nn->client_tracking_ops->init(net);
+out:
 	if (status) {
 		printk(KERN_WARNING "NFSD: Unable to initialize client "
 				    "recovery tracking! (%d)\n", status);
diff --git a/fs/nfsd/nfs4state.c b/fs/nfsd/nfs4state.c
index fb3c9844c82a..7857942c5ca6 100644
--- a/fs/nfsd/nfs4state.c
+++ b/fs/nfsd/nfs4state.c
@@ -42,6 +42,7 @@
 #include <linux/sunrpc/svcauth_gss.h>
 #include <linux/sunrpc/addr.h>
 #include <linux/jhash.h>
+#include <linux/string_helpers.h>
 #include "xdr4.h"
 #include "xdr4cb.h"
 #include "vfs.h"
@@ -77,6 +78,7 @@ static u64 current_sessionid = 1;
 /* forward declarations */
 static bool check_for_locks(struct nfs4_file *fp, struct nfs4_lockowner *lowner);
 static void nfs4_free_ol_stateid(struct nfs4_stid *stid);
+void nfsd4_end_grace(struct nfsd_net *nn);
 
 /* Locking: */
 
@@ -98,6 +100,13 @@ enum nfsd4_st_mutex_lock_subclass {
  */
 static DECLARE_WAIT_QUEUE_HEAD(close_wq);
 
+/*
+ * A waitqueue where a writer to clients/#/ctl destroying a client can
+ * wait for cl_rpc_users to drop to 0 and then for the client to be
+ * unhashed.
+ */
+static DECLARE_WAIT_QUEUE_HEAD(expiry_wq);
+
 static struct kmem_cache *client_slab;
 static struct kmem_cache *openowner_slab;
 static struct kmem_cache *lockowner_slab;
@@ -137,7 +146,7 @@ static __be32 get_client_locked(struct nfs4_client *clp)
 
 	if (is_client_expired(clp))
 		return nfserr_expired;
-	atomic_inc(&clp->cl_refcount);
+	atomic_inc(&clp->cl_rpc_users);
 	return nfs_ok;
 }
 
@@ -169,20 +178,24 @@ static void put_client_renew_locked(struct nfs4_client *clp)
 
 	lockdep_assert_held(&nn->client_lock);
 
-	if (!atomic_dec_and_test(&clp->cl_refcount))
+	if (!atomic_dec_and_test(&clp->cl_rpc_users))
 		return;
 	if (!is_client_expired(clp))
 		renew_client_locked(clp);
+	else
+		wake_up_all(&expiry_wq);
 }
 
 static void put_client_renew(struct nfs4_client *clp)
 {
 	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
 
-	if (!atomic_dec_and_lock(&clp->cl_refcount, &nn->client_lock))
+	if (!atomic_dec_and_lock(&clp->cl_rpc_users, &nn->client_lock))
 		return;
 	if (!is_client_expired(clp))
 		renew_client_locked(clp);
+	else
+		wake_up_all(&expiry_wq);
 	spin_unlock(&nn->client_lock);
 }
 
@@ -265,6 +278,7 @@ find_or_allocate_block(struct nfs4_lockowner *lo, struct knfsd_fh *fh,
 static void
 free_blocked_lock(struct nfsd4_blocked_lock *nbl)
 {
+	locks_delete_block(&nbl->nbl_lock);
 	locks_release_private(&nbl->nbl_lock);
 	kfree(nbl);
 }
@@ -293,11 +307,18 @@ remove_blocked_locks(struct nfs4_lockowner *lo)
 		nbl = list_first_entry(&reaplist, struct nfsd4_blocked_lock,
 					nbl_lru);
 		list_del_init(&nbl->nbl_lru);
-		locks_delete_block(&nbl->nbl_lock);
 		free_blocked_lock(nbl);
 	}
 }
 
+static void
+nfsd4_cb_notify_lock_prepare(struct nfsd4_callback *cb)
+{
+	struct nfsd4_blocked_lock	*nbl = container_of(cb,
+						struct nfsd4_blocked_lock, nbl_cb);
+	locks_delete_block(&nbl->nbl_lock);
+}
+
 static int
 nfsd4_cb_notify_lock_done(struct nfsd4_callback *cb, struct rpc_task *task)
 {
@@ -325,6 +346,7 @@ nfsd4_cb_notify_lock_release(struct nfsd4_callback *cb)
 }
 
 static const struct nfsd4_callback_ops nfsd4_cb_notify_lock_ops = {
+	.prepare	= nfsd4_cb_notify_lock_prepare,
 	.done		= nfsd4_cb_notify_lock_done,
 	.release	= nfsd4_cb_notify_lock_release,
 };
@@ -684,7 +706,8 @@ struct nfs4_stid *nfs4_alloc_stid(struct nfs4_client *cl, struct kmem_cache *sla
 
 	idr_preload(GFP_KERNEL);
 	spin_lock(&cl->cl_lock);
-	new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 0, 0, GFP_NOWAIT);
+	/* Reserving 0 for start of file in nfsdfs "states" file: */
+	new_id = idr_alloc_cyclic(&cl->cl_stateids, stid, 1, 0, GFP_NOWAIT);
 	spin_unlock(&cl->cl_lock);
 	idr_preload_end();
 	if (new_id < 0)
@@ -1058,9 +1081,9 @@ static unsigned int clientid_hashval(u32 id)
 	return id & CLIENT_HASH_MASK;
 }
 
-static unsigned int clientstr_hashval(const char *name)
+static unsigned int clientstr_hashval(struct xdr_netobj name)
 {
-	return opaque_hashval(name, 8) & CLIENT_HASH_MASK;
+	return opaque_hashval(name.data, 8) & CLIENT_HASH_MASK;
 }
 
 /*
@@ -1544,16 +1567,16 @@ static u32 nfsd4_get_drc_mem(struct nfsd4_channel_attrs *ca)
 {
 	u32 slotsize = slot_bytes(ca);
 	u32 num = ca->maxreqs;
-	int avail;
+	unsigned long avail, total_avail;
 
 	spin_lock(&nfsd_drc_lock);
-	avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION,
-		    nfsd_drc_max_mem - nfsd_drc_mem_used);
+	total_avail = nfsd_drc_max_mem - nfsd_drc_mem_used;
+	avail = min((unsigned long)NFSD_MAX_MEM_PER_SESSION, total_avail);
 	/*
 	 * Never use more than a third of the remaining memory,
 	 * unless it's the only way to give this client a slot:
 	 */
-	avail = clamp_t(int, avail, slotsize, avail/3);
+	avail = clamp_t(unsigned long, avail, slotsize, total_avail/3);
 	num = min_t(int, num, avail / slotsize);
 	nfsd_drc_mem_used += num * slotsize;
 	spin_unlock(&nfsd_drc_lock);
@@ -1834,7 +1857,7 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name)
 	clp = kmem_cache_zalloc(client_slab, GFP_KERNEL);
 	if (clp == NULL)
 		return NULL;
-	clp->cl_name.data = kmemdup(name.data, name.len, GFP_KERNEL);
+	xdr_netobj_dup(&clp->cl_name, &name, GFP_KERNEL);
 	if (clp->cl_name.data == NULL)
 		goto err_no_name;
 	clp->cl_ownerstr_hashtbl = kmalloc_array(OWNER_HASH_SIZE,
@@ -1844,10 +1867,9 @@ static struct nfs4_client *alloc_client(struct xdr_netobj name)
 		goto err_no_hashtbl;
 	for (i = 0; i < OWNER_HASH_SIZE; i++)
 		INIT_LIST_HEAD(&clp->cl_ownerstr_hashtbl[i]);
-	clp->cl_name.len = name.len;
 	INIT_LIST_HEAD(&clp->cl_sessions);
 	idr_init(&clp->cl_stateids);
-	atomic_set(&clp->cl_refcount, 0);
+	atomic_set(&clp->cl_rpc_users, 0);
 	clp->cl_cb_state = NFSD4_CB_UNKNOWN;
 	INIT_LIST_HEAD(&clp->cl_idhash);
 	INIT_LIST_HEAD(&clp->cl_openowners);
@@ -1869,6 +1891,25 @@ err_no_name:
 	return NULL;
 }
 
+static void __free_client(struct kref *k)
+{
+	struct nfsdfs_client *c = container_of(k, struct nfsdfs_client, cl_ref);
+	struct nfs4_client *clp = container_of(c, struct nfs4_client, cl_nfsdfs);
+
+	free_svc_cred(&clp->cl_cred);
+	kfree(clp->cl_ownerstr_hashtbl);
+	kfree(clp->cl_name.data);
+	kfree(clp->cl_nii_domain.data);
+	kfree(clp->cl_nii_name.data);
+	idr_destroy(&clp->cl_stateids);
+	kmem_cache_free(client_slab, clp);
+}
+
+static void drop_client(struct nfs4_client *clp)
+{
+	kref_put(&clp->cl_nfsdfs.cl_ref, __free_client);
+}
+
 static void
 free_client(struct nfs4_client *clp)
 {
@@ -1881,11 +1922,12 @@ free_client(struct nfs4_client *clp)
 		free_session(ses);
 	}
 	rpc_destroy_wait_queue(&clp->cl_cb_waitq);
-	free_svc_cred(&clp->cl_cred);
-	kfree(clp->cl_ownerstr_hashtbl);
-	kfree(clp->cl_name.data);
-	idr_destroy(&clp->cl_stateids);
-	kmem_cache_free(client_slab, clp);
+	if (clp->cl_nfsd_dentry) {
+		nfsd_client_rmdir(clp->cl_nfsd_dentry);
+		clp->cl_nfsd_dentry = NULL;
+		wake_up_all(&expiry_wq);
+	}
+	drop_client(clp);
 }
 
 /* must be called under the client_lock */
@@ -1926,7 +1968,7 @@ unhash_client(struct nfs4_client *clp)
 
 static __be32 mark_client_expired_locked(struct nfs4_client *clp)
 {
-	if (atomic_read(&clp->cl_refcount))
+	if (atomic_read(&clp->cl_rpc_users))
 		return nfserr_jukebox;
 	unhash_client_locked(clp);
 	return nfs_ok;
@@ -1979,6 +2021,7 @@ __destroy_client(struct nfs4_client *clp)
 	if (clp->cl_cb_conn.cb_xprt)
 		svc_xprt_put(clp->cl_cb_conn.cb_xprt);
 	free_client(clp);
+	wake_up_all(&expiry_wq);
 }
 
 static void
@@ -1988,6 +2031,22 @@ destroy_client(struct nfs4_client *clp)
 	__destroy_client(clp);
 }
 
+static void inc_reclaim_complete(struct nfs4_client *clp)
+{
+	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+
+	if (!nn->track_reclaim_completes)
+		return;
+	if (!nfsd4_find_reclaim_client(clp->cl_name, nn))
+		return;
+	if (atomic_inc_return(&nn->nr_reclaim_complete) ==
+			nn->reclaim_str_hashtbl_size) {
+		printk(KERN_INFO "NFSD: all clients done reclaiming, ending NFSv4 grace period (net %x)\n",
+				clp->net->ns.inum);
+		nfsd4_end_grace(nn);
+	}
+}
+
 static void expire_client(struct nfs4_client *clp)
 {
 	unhash_client(clp);
@@ -2039,11 +2098,6 @@ compare_blob(const struct xdr_netobj *o1, const struct xdr_netobj *o2)
 	return memcmp(o1->data, o2->data, o1->len);
 }
 
-static int same_name(const char *n1, const char *n2)
-{
-	return 0 == memcmp(n1, n2, HEXDIR_LEN);
-}
-
 static int
 same_verf(nfs4_verifier *v1, nfs4_verifier *v2)
 {
@@ -2178,6 +2232,342 @@ find_stateid_by_type(struct nfs4_client *cl, stateid_t *t, char typemask)
 	return s;
 }
 
+static struct nfs4_client *get_nfsdfs_clp(struct inode *inode)
+{
+	struct nfsdfs_client *nc;
+	nc = get_nfsdfs_client(inode);
+	if (!nc)
+		return NULL;
+	return container_of(nc, struct nfs4_client, cl_nfsdfs);
+}
+
+static void seq_quote_mem(struct seq_file *m, char *data, int len)
+{
+	seq_printf(m, "\"");
+	seq_escape_mem_ascii(m, data, len);
+	seq_printf(m, "\"");
+}
+
+static int client_info_show(struct seq_file *m, void *v)
+{
+	struct inode *inode = m->private;
+	struct nfs4_client *clp;
+	u64 clid;
+
+	clp = get_nfsdfs_clp(inode);
+	if (!clp)
+		return -ENXIO;
+	memcpy(&clid, &clp->cl_clientid, sizeof(clid));
+	seq_printf(m, "clientid: 0x%llx\n", clid);
+	seq_printf(m, "address: \"%pISpc\"\n", (struct sockaddr *)&clp->cl_addr);
+	seq_printf(m, "name: ");
+	seq_quote_mem(m, clp->cl_name.data, clp->cl_name.len);
+	seq_printf(m, "\nminor version: %d\n", clp->cl_minorversion);
+	if (clp->cl_nii_domain.data) {
+		seq_printf(m, "Implementation domain: ");
+		seq_quote_mem(m, clp->cl_nii_domain.data,
+					clp->cl_nii_domain.len);
+		seq_printf(m, "\nImplementation name: ");
+		seq_quote_mem(m, clp->cl_nii_name.data, clp->cl_nii_name.len);
+		seq_printf(m, "\nImplementation time: [%ld, %ld]\n",
+			clp->cl_nii_time.tv_sec, clp->cl_nii_time.tv_nsec);
+	}
+	drop_client(clp);
+
+	return 0;
+}
+
+static int client_info_open(struct inode *inode, struct file *file)
+{
+	return single_open(file, client_info_show, inode);
+}
+
+static const struct file_operations client_info_fops = {
+	.open		= client_info_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= single_release,
+};
+
+static void *states_start(struct seq_file *s, loff_t *pos)
+	__acquires(&clp->cl_lock)
+{
+	struct nfs4_client *clp = s->private;
+	unsigned long id = *pos;
+	void *ret;
+
+	spin_lock(&clp->cl_lock);
+	ret = idr_get_next_ul(&clp->cl_stateids, &id);
+	*pos = id;
+	return ret;
+}
+
+static void *states_next(struct seq_file *s, void *v, loff_t *pos)
+{
+	struct nfs4_client *clp = s->private;
+	unsigned long id = *pos;
+	void *ret;
+
+	id = *pos;
+	id++;
+	ret = idr_get_next_ul(&clp->cl_stateids, &id);
+	*pos = id;
+	return ret;
+}
+
+static void states_stop(struct seq_file *s, void *v)
+	__releases(&clp->cl_lock)
+{
+	struct nfs4_client *clp = s->private;
+
+	spin_unlock(&clp->cl_lock);
+}
+
+static void nfs4_show_superblock(struct seq_file *s, struct file *f)
+{
+	struct inode *inode = file_inode(f);
+
+	seq_printf(s, "superblock: \"%02x:%02x:%ld\"",
+					MAJOR(inode->i_sb->s_dev),
+					 MINOR(inode->i_sb->s_dev),
+					 inode->i_ino);
+}
+
+static void nfs4_show_owner(struct seq_file *s, struct nfs4_stateowner *oo)
+{
+	seq_printf(s, "owner: ");
+	seq_quote_mem(s, oo->so_owner.data, oo->so_owner.len);
+}
+
+static int nfs4_show_open(struct seq_file *s, struct nfs4_stid *st)
+{
+	struct nfs4_ol_stateid *ols;
+	struct nfs4_file *nf;
+	struct file *file;
+	struct nfs4_stateowner *oo;
+	unsigned int access, deny;
+
+	if (st->sc_type != NFS4_OPEN_STID && st->sc_type != NFS4_LOCK_STID)
+		return 0; /* XXX: or SEQ_SKIP? */
+	ols = openlockstateid(st);
+	oo = ols->st_stateowner;
+	nf = st->sc_file;
+	file = find_any_file(nf);
+
+	seq_printf(s, "- 0x%16phN: { type: open, ", &st->sc_stateid);
+
+	access = bmap_to_share_mode(ols->st_access_bmap);
+	deny   = bmap_to_share_mode(ols->st_deny_bmap);
+
+	seq_printf(s, "access: \%s\%s, ",
+		access & NFS4_SHARE_ACCESS_READ ? "r" : "-",
+		access & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");
+	seq_printf(s, "deny: \%s\%s, ",
+		deny & NFS4_SHARE_ACCESS_READ ? "r" : "-",
+		deny & NFS4_SHARE_ACCESS_WRITE ? "w" : "-");
+
+	nfs4_show_superblock(s, file);
+	seq_printf(s, ", ");
+	nfs4_show_owner(s, oo);
+	seq_printf(s, " }\n");
+	fput(file);
+
+	return 0;
+}
+
+static int nfs4_show_lock(struct seq_file *s, struct nfs4_stid *st)
+{
+	struct nfs4_ol_stateid *ols;
+	struct nfs4_file *nf;
+	struct file *file;
+	struct nfs4_stateowner *oo;
+
+	ols = openlockstateid(st);
+	oo = ols->st_stateowner;
+	nf = st->sc_file;
+	file = find_any_file(nf);
+
+	seq_printf(s, "- 0x%16phN: { type: lock, ", &st->sc_stateid);
+
+	/*
+	 * Note: a lock stateid isn't really the same thing as a lock,
+	 * it's the locking state held by one owner on a file, and there
+	 * may be multiple (or no) lock ranges associated with it.
+	 * (Same for the matter is true of open stateids.)
+	 */
+
+	nfs4_show_superblock(s, file);
+	/* XXX: open stateid? */
+	seq_printf(s, ", ");
+	nfs4_show_owner(s, oo);
+	seq_printf(s, " }\n");
+	fput(file);
+
+	return 0;
+}
+
+static int nfs4_show_deleg(struct seq_file *s, struct nfs4_stid *st)
+{
+	struct nfs4_delegation *ds;
+	struct nfs4_file *nf;
+	struct file *file;
+
+	ds = delegstateid(st);
+	nf = st->sc_file;
+	file = nf->fi_deleg_file;
+
+	seq_printf(s, "- 0x%16phN: { type: deleg, ", &st->sc_stateid);
+
+	/* Kinda dead code as long as we only support read delegs: */
+	seq_printf(s, "access: %s, ",
+		ds->dl_type == NFS4_OPEN_DELEGATE_READ ? "r" : "w");
+
+	/* XXX: lease time, whether it's being recalled. */
+
+	nfs4_show_superblock(s, file);
+	seq_printf(s, " }\n");
+
+	return 0;
+}
+
+static int nfs4_show_layout(struct seq_file *s, struct nfs4_stid *st)
+{
+	struct nfs4_layout_stateid *ls;
+	struct file *file;
+
+	ls = container_of(st, struct nfs4_layout_stateid, ls_stid);
+	file = ls->ls_file;
+
+	seq_printf(s, "- 0x%16phN: { type: layout, ", &st->sc_stateid);
+
+	/* XXX: What else would be useful? */
+
+	nfs4_show_superblock(s, file);
+	seq_printf(s, " }\n");
+
+	return 0;
+}
+
+static int states_show(struct seq_file *s, void *v)
+{
+	struct nfs4_stid *st = v;
+
+	switch (st->sc_type) {
+	case NFS4_OPEN_STID:
+		return nfs4_show_open(s, st);
+	case NFS4_LOCK_STID:
+		return nfs4_show_lock(s, st);
+	case NFS4_DELEG_STID:
+		return nfs4_show_deleg(s, st);
+	case NFS4_LAYOUT_STID:
+		return nfs4_show_layout(s, st);
+	default:
+		return 0; /* XXX: or SEQ_SKIP? */
+	}
+	/* XXX: copy stateids? */
+}
+
+static struct seq_operations states_seq_ops = {
+	.start = states_start,
+	.next = states_next,
+	.stop = states_stop,
+	.show = states_show
+};
+
+static int client_states_open(struct inode *inode, struct file *file)
+{
+	struct seq_file *s;
+	struct nfs4_client *clp;
+	int ret;
+
+	clp = get_nfsdfs_clp(inode);
+	if (!clp)
+		return -ENXIO;
+
+	ret = seq_open(file, &states_seq_ops);
+	if (ret)
+		return ret;
+	s = file->private_data;
+	s->private = clp;
+	return 0;
+}
+
+static int client_opens_release(struct inode *inode, struct file *file)
+{
+	struct seq_file *m = file->private_data;
+	struct nfs4_client *clp = m->private;
+
+	/* XXX: alternatively, we could get/drop in seq start/stop */
+	drop_client(clp);
+	return 0;
+}
+
+static const struct file_operations client_states_fops = {
+	.open		= client_states_open,
+	.read		= seq_read,
+	.llseek		= seq_lseek,
+	.release	= client_opens_release,
+};
+
+/*
+ * Normally we refuse to destroy clients that are in use, but here the
+ * administrator is telling us to just do it.  We also want to wait
+ * so the caller has a guarantee that the client's locks are gone by
+ * the time the write returns:
+ */
+static void force_expire_client(struct nfs4_client *clp)
+{
+	struct nfsd_net *nn = net_generic(clp->net, nfsd_net_id);
+	bool already_expired;
+
+	spin_lock(&clp->cl_lock);
+	clp->cl_time = 0;
+	spin_unlock(&clp->cl_lock);
+
+	wait_event(expiry_wq, atomic_read(&clp->cl_rpc_users) == 0);
+	spin_lock(&nn->client_lock);
+	already_expired = list_empty(&clp->cl_lru);
+	if (!already_expired)
+		unhash_client_locked(clp);
+	spin_unlock(&nn->client_lock);
+
+	if (!already_expired)
+		expire_client(clp);
+	else
+		wait_event(expiry_wq, clp->cl_nfsd_dentry == NULL);
+}
+
+static ssize_t client_ctl_write(struct file *file, const char __user *buf,
+				   size_t size, loff_t *pos)
+{
+	char *data;
+	struct nfs4_client *clp;
+
+	data = simple_transaction_get(file, buf, size);
+	if (IS_ERR(data))
+		return PTR_ERR(data);
+	if (size != 7 || 0 != memcmp(data, "expire\n", 7))
+		return -EINVAL;
+	clp = get_nfsdfs_clp(file_inode(file));
+	if (!clp)
+		return -ENXIO;
+	force_expire_client(clp);
+	drop_client(clp);
+	return 7;
+}
+
+static const struct file_operations client_ctl_fops = {
+	.write		= client_ctl_write,
+	.release	= simple_transaction_release,
+};
+
+static const struct tree_descr client_files[] = {
+	[0] = {"info", &client_info_fops, S_IRUSR},
+	[1] = {"states", &client_states_fops, S_IRUSR},
+	[2] = {"ctl", &client_ctl_fops, S_IRUSR|S_IWUSR},
+	[3] = {""},
+};
+
 static struct nfs4_client *create_client(struct xdr_netobj name,
 		struct svc_rqst *rqstp, nfs4_verifier *verf)
 {
@@ -2185,6 +2575,7 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
 	struct sockaddr *sa = svc_addr(rqstp);
 	int ret;
 	struct net *net = SVC_NET(rqstp);
+	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 
 	clp = alloc_client(name);
 	if (clp == NULL)
@@ -2195,13 +2586,22 @@ static struct nfs4_client *create_client(struct xdr_netobj name,
 		free_client(clp);
 		return NULL;
 	}
+	gen_clid(clp, nn);
+	kref_init(&clp->cl_nfsdfs.cl_ref);
 	nfsd4_init_cb(&clp->cl_cb_null, clp, NULL, NFSPROC4_CLNT_CB_NULL);
 	clp->cl_time = get_seconds();
 	clear_bit(0, &clp->cl_cb_slot_busy);
 	copy_verf(clp, verf);
-	rpc_copy_addr((struct sockaddr *) &clp->cl_addr, sa);
+	memcpy(&clp->cl_addr, sa, sizeof(struct sockaddr_storage));
 	clp->cl_cb_session = NULL;
 	clp->net = net;
+	clp->cl_nfsd_dentry = nfsd_client_mkdir(nn, &clp->cl_nfsdfs,
+			clp->cl_clientid.cl_id - nn->clientid_base,
+			client_files);
+	if (!clp->cl_nfsd_dentry) {
+		free_client(clp);
+		return NULL;
+	}
 	return clp;
 }
 
@@ -2512,6 +2912,22 @@ static bool client_has_state(struct nfs4_client *clp)
 		|| !list_empty(&clp->async_copies);
 }
 
+static __be32 copy_impl_id(struct nfs4_client *clp,
+				struct nfsd4_exchange_id *exid)
+{
+	if (!exid->nii_domain.data)
+		return 0;
+	xdr_netobj_dup(&clp->cl_nii_domain, &exid->nii_domain, GFP_KERNEL);
+	if (!clp->cl_nii_domain.data)
+		return nfserr_jukebox;
+	xdr_netobj_dup(&clp->cl_nii_name, &exid->nii_name, GFP_KERNEL);
+	if (!clp->cl_nii_name.data)
+		return nfserr_jukebox;
+	clp->cl_nii_time.tv_sec = exid->nii_time.tv_sec;
+	clp->cl_nii_time.tv_nsec = exid->nii_time.tv_nsec;
+	return 0;
+}
+
 __be32
 nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		union nfsd4_op_u *u)
@@ -2538,6 +2954,9 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 	new = create_client(exid->clname, rqstp, &verf);
 	if (new == NULL)
 		return nfserr_jukebox;
+	status = copy_impl_id(new, exid);
+	if (status)
+		goto out_nolock;
 
 	switch (exid->spa_how) {
 	case SP4_MACH_CRED:
@@ -2576,6 +2995,7 @@ nfsd4_exchange_id(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		break;
 	default:				/* checked by xdr code */
 		WARN_ON_ONCE(1);
+		/* fall through */
 	case SP4_SSV:
 		status = nfserr_encr_alg_unsupp;
 		goto out_nolock;
@@ -2645,7 +3065,6 @@ out_new:
 	new->cl_spo_must_allow.u.words[0] = exid->spo_must_allow[0];
 	new->cl_spo_must_allow.u.words[1] = exid->spo_must_allow[1];
 
-	gen_clid(new, nn);
 	add_to_unconfirmed(new);
 	swap(new, conf);
 out_copy:
@@ -3344,6 +3763,7 @@ nfsd4_reclaim_complete(struct svc_rqst *rqstp,
 
 	status = nfs_ok;
 	nfsd4_client_record_create(cstate->session->se_client);
+	inc_reclaim_complete(cstate->session->se_client);
 out:
 	return status;
 }
@@ -3388,7 +3808,7 @@ nfsd4_setclientid(struct svc_rqst *rqstp, struct nfsd4_compound_state *cstate,
 		copy_clid(new, conf);
 		gen_confirm(new, nn);
 	} else /* case 4 (new client) or cases 2, 3 (client reboot): */
-		gen_clid(new, nn);
+		;
 	new->cl_minorversion = 0;
 	gen_callback(new, setclid, rqstp);
 	add_to_unconfirmed(new);
@@ -3609,12 +4029,11 @@ static inline void *alloc_stateowner(struct kmem_cache *slab, struct xdr_netobj
 	if (!sop)
 		return NULL;
 
-	sop->so_owner.data = kmemdup(owner->data, owner->len, GFP_KERNEL);
+	xdr_netobj_dup(&sop->so_owner, owner, GFP_KERNEL);
 	if (!sop->so_owner.data) {
 		kmem_cache_free(slab, sop);
 		return NULL;
 	}
-	sop->so_owner.len = owner->len;
 
 	INIT_LIST_HEAD(&sop->so_stateids);
 	sop->so_client = clp;
@@ -3948,6 +4367,9 @@ static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
 	switch (task->tk_status) {
 	case 0:
 		return 1;
+	case -NFS4ERR_DELAY:
+		rpc_delay(task, 2 * HZ);
+		return 0;
 	case -EBADHANDLE:
 	case -NFS4ERR_BAD_STATEID:
 		/*
@@ -3960,7 +4382,7 @@ static int nfsd4_cb_recall_done(struct nfsd4_callback *cb,
 		}
 		/*FALLTHRU*/
 	default:
-		return -1;
+		return 1;
 	}
 }
 
@@ -4066,7 +4488,7 @@ static __be32 lookup_clientid(clientid_t *clid,
 		spin_unlock(&nn->client_lock);
 		return nfserr_expired;
 	}
-	atomic_inc(&found->cl_refcount);
+	atomic_inc(&found->cl_rpc_users);
 	spin_unlock(&nn->client_lock);
 
 	/* Cache the nfs4_client in cstate! */
@@ -4703,7 +5125,6 @@ nfsd4_end_grace(struct nfsd_net *nn)
 	if (nn->grace_ended)
 		return;
 
-	dprintk("NFSD: end of grace period\n");
 	nn->grace_ended = true;
 	/*
 	 * If the server goes down again right now, an NFSv4
@@ -4739,6 +5160,10 @@ static bool clients_still_reclaiming(struct nfsd_net *nn)
 	unsigned long double_grace_period_end = nn->boot_time +
 						2 * nn->nfsd4_lease;
 
+	if (nn->track_reclaim_completes &&
+			atomic_read(&nn->nr_reclaim_complete) ==
+			nn->reclaim_str_hashtbl_size)
+		return false;
 	if (!nn->somebody_reclaimed)
 		return false;
 	nn->somebody_reclaimed = false;
@@ -4769,6 +5194,7 @@ nfs4_laundromat(struct nfsd_net *nn)
 		new_timeo = 0;
 		goto out;
 	}
+	dprintk("NFSD: end of grace period\n");
 	nfsd4_end_grace(nn);
 	INIT_LIST_HEAD(&reaplist);
 	spin_lock(&nn->client_lock);
@@ -4863,7 +5289,6 @@ nfs4_laundromat(struct nfsd_net *nn)
 		nbl = list_first_entry(&reaplist,
 					struct nfsd4_blocked_lock, nbl_lru);
 		list_del_init(&nbl->nbl_lru);
-		locks_delete_block(&nbl->nbl_lock);
 		free_blocked_lock(nbl);
 	}
 out:
@@ -5696,12 +6121,11 @@ nfs4_set_lock_denied(struct file_lock *fl, struct nfsd4_lock_denied *deny)
 
 	if (fl->fl_lmops == &nfsd_posix_mng_ops) {
 		lo = (struct nfs4_lockowner *) fl->fl_owner;
-		deny->ld_owner.data = kmemdup(lo->lo_owner.so_owner.data,
-					lo->lo_owner.so_owner.len, GFP_KERNEL);
+		xdr_netobj_dup(&deny->ld_owner, &lo->lo_owner.so_owner,
+						GFP_KERNEL);
 		if (!deny->ld_owner.data)
 			/* We just don't care that much */
 			goto nevermind;
-		deny->ld_owner.len = lo->lo_owner.so_owner.len;
 		deny->ld_clientid = lo->lo_owner.so_client->cl_clientid;
 	} else {
 nevermind:
@@ -6449,7 +6873,7 @@ alloc_reclaim(void)
 }
 
 bool
-nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
+nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn)
 {
 	struct nfs4_client_reclaim *crp;
 
@@ -6459,20 +6883,24 @@ nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn)
 
 /*
  * failure => all reset bets are off, nfserr_no_grace...
+ *
+ * The caller is responsible for freeing name.data if NULL is returned (it
+ * will be freed in nfs4_remove_reclaim_record in the normal case).
  */
 struct nfs4_client_reclaim *
-nfs4_client_to_reclaim(const char *name, struct nfsd_net *nn)
+nfs4_client_to_reclaim(struct xdr_netobj name, struct nfsd_net *nn)
 {
 	unsigned int strhashval;
 	struct nfs4_client_reclaim *crp;
 
-	dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", HEXDIR_LEN, name);
+	dprintk("NFSD nfs4_client_to_reclaim NAME: %.*s\n", name.len, name.data);
 	crp = alloc_reclaim();
 	if (crp) {
 		strhashval = clientstr_hashval(name);
 		INIT_LIST_HEAD(&crp->cr_strhash);
 		list_add(&crp->cr_strhash, &nn->reclaim_str_hashtbl[strhashval]);
-		memcpy(crp->cr_recdir, name, HEXDIR_LEN);
+		crp->cr_name.data = name.data;
+		crp->cr_name.len = name.len;
 		crp->cr_clp = NULL;
 		nn->reclaim_str_hashtbl_size++;
 	}
@@ -6483,6 +6911,7 @@ void
 nfs4_remove_reclaim_record(struct nfs4_client_reclaim *crp, struct nfsd_net *nn)
 {
 	list_del(&crp->cr_strhash);
+	kfree(crp->cr_name.data);
 	kfree(crp);
 	nn->reclaim_str_hashtbl_size--;
 }
@@ -6506,16 +6935,16 @@ nfs4_release_reclaim(struct nfsd_net *nn)
 /*
  * called from OPEN, CLAIM_PREVIOUS with a new clientid. */
 struct nfs4_client_reclaim *
-nfsd4_find_reclaim_client(const char *recdir, struct nfsd_net *nn)
+nfsd4_find_reclaim_client(struct xdr_netobj name, struct nfsd_net *nn)
 {
 	unsigned int strhashval;
 	struct nfs4_client_reclaim *crp = NULL;
 
-	dprintk("NFSD: nfs4_find_reclaim_client for recdir %s\n", recdir);
+	dprintk("NFSD: nfs4_find_reclaim_client for name %.*s\n", name.len, name.data);
 
-	strhashval = clientstr_hashval(recdir);
+	strhashval = clientstr_hashval(name);
 	list_for_each_entry(crp, &nn->reclaim_str_hashtbl[strhashval], cr_strhash) {
-		if (same_name(crp->cr_recdir, recdir)) {
+		if (compare_blob(&crp->cr_name, &name) == 0) {
 			return crp;
 		}
 	}
@@ -6550,7 +6979,7 @@ nfs4_check_open_reclaim(clientid_t *clid,
 static inline void
 put_client(struct nfs4_client *clp)
 {
-	atomic_dec(&clp->cl_refcount);
+	atomic_dec(&clp->cl_rpc_users);
 }
 
 static struct nfs4_client *
@@ -6668,7 +7097,7 @@ nfsd_inject_add_lock_to_list(struct nfs4_ol_stateid *lst,
 		return;
 
 	lockdep_assert_held(&nn->client_lock);
-	atomic_inc(&clp->cl_refcount);
+	atomic_inc(&clp->cl_rpc_users);
 	list_add(&lst->st_locks, collect);
 }
 
@@ -6697,7 +7126,7 @@ static u64 nfsd_foreach_client_lock(struct nfs4_client *clp, u64 max,
 				 * Despite the fact that these functions deal
 				 * with 64-bit integers for "count", we must
 				 * ensure that it doesn't blow up the
-				 * clp->cl_refcount. Throw a warning if we
+				 * clp->cl_rpc_users. Throw a warning if we
 				 * start to approach INT_MAX here.
 				 */
 				WARN_ON_ONCE(count == (INT_MAX / 2));
@@ -6821,7 +7250,7 @@ nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max,
 		if (func) {
 			func(oop);
 			if (collect) {
-				atomic_inc(&clp->cl_refcount);
+				atomic_inc(&clp->cl_rpc_users);
 				list_add(&oop->oo_perclient, collect);
 			}
 		}
@@ -6829,7 +7258,7 @@ nfsd_foreach_client_openowner(struct nfs4_client *clp, u64 max,
 		/*
 		 * Despite the fact that these functions deal with
 		 * 64-bit integers for "count", we must ensure that
-		 * it doesn't blow up the clp->cl_refcount. Throw a
+		 * it doesn't blow up the clp->cl_rpc_users. Throw a
 		 * warning if we start to approach INT_MAX here.
 		 */
 		WARN_ON_ONCE(count == (INT_MAX / 2));
@@ -6959,7 +7388,7 @@ static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
 			if (dp->dl_time != 0)
 				continue;
 
-			atomic_inc(&clp->cl_refcount);
+			atomic_inc(&clp->cl_rpc_users);
 			WARN_ON(!unhash_delegation_locked(dp));
 			list_add(&dp->dl_recall_lru, victims);
 		}
@@ -6967,7 +7396,7 @@ static u64 nfsd_find_all_delegations(struct nfs4_client *clp, u64 max,
 		/*
 		 * Despite the fact that these functions deal with
 		 * 64-bit integers for "count", we must ensure that
-		 * it doesn't blow up the clp->cl_refcount. Throw a
+		 * it doesn't blow up the clp->cl_rpc_users. Throw a
 		 * warning if we start to approach INT_MAX here.
 		 */
 		WARN_ON_ONCE(count == (INT_MAX / 2));
@@ -7253,10 +7682,19 @@ nfs4_state_start_net(struct net *net)
 		return ret;
 	locks_start_grace(net, &nn->nfsd4_manager);
 	nfsd4_client_tracking_init(net);
+	if (nn->track_reclaim_completes && nn->reclaim_str_hashtbl_size == 0)
+		goto skip_grace;
 	printk(KERN_INFO "NFSD: starting %ld-second grace period (net %x)\n",
 	       nn->nfsd4_grace, net->ns.inum);
 	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_grace * HZ);
 	return 0;
+
+skip_grace:
+	printk(KERN_INFO "NFSD: no clients to reclaim, skipping NFSv4 grace period (net %x)\n",
+			net->ns.inum);
+	queue_delayed_work(laundry_wq, &nn->laundromat_work, nn->nfsd4_lease * HZ);
+	nfsd4_end_grace(nn);
+	return 0;
 }
 
 /* initialization to perform when the nfsd service is started: */
diff --git a/fs/nfsd/nfs4xdr.c b/fs/nfsd/nfs4xdr.c
index 3de42a729093..442811809f3d 100644
--- a/fs/nfsd/nfs4xdr.c
+++ b/fs/nfsd/nfs4xdr.c
@@ -269,19 +269,13 @@ static char *savemem(struct nfsd4_compoundargs *argp, __be32 *p, int nbytes)
 	return ret;
 }
 
-/*
- * We require the high 32 bits of 'seconds' to be 0, and
- * we ignore all 32 bits of 'nseconds'.
- */
 static __be32
-nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec *tv)
+nfsd4_decode_time(struct nfsd4_compoundargs *argp, struct timespec64 *tv)
 {
 	DECODE_HEAD;
-	u64 sec;
 
 	READ_BUF(12);
-	p = xdr_decode_hyper(p, &sec);
-	tv->tv_sec = sec;
+	p = xdr_decode_hyper(p, &tv->tv_sec);
 	tv->tv_nsec = be32_to_cpup(p++);
 	if (tv->tv_nsec >= (u32)1000000000)
 		return nfserr_inval;
@@ -320,7 +314,6 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
 		   struct iattr *iattr, struct nfs4_acl **acl,
 		   struct xdr_netobj *label, int *umask)
 {
-	struct timespec ts;
 	int expected_len, len = 0;
 	u32 dummy32;
 	char *buf;
@@ -422,8 +415,7 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
 		switch (dummy32) {
 		case NFS4_SET_TO_CLIENT_TIME:
 			len += 12;
-			status = nfsd4_decode_time(argp, &ts);
-			iattr->ia_atime = timespec_to_timespec64(ts);
+			status = nfsd4_decode_time(argp, &iattr->ia_atime);
 			if (status)
 				return status;
 			iattr->ia_valid |= (ATTR_ATIME | ATTR_ATIME_SET);
@@ -442,8 +434,7 @@ nfsd4_decode_fattr(struct nfsd4_compoundargs *argp, u32 *bmval,
 		switch (dummy32) {
 		case NFS4_SET_TO_CLIENT_TIME:
 			len += 12;
-			status = nfsd4_decode_time(argp, &ts);
-			iattr->ia_mtime = timespec_to_timespec64(ts);
+			status = nfsd4_decode_time(argp, &iattr->ia_mtime);
 			if (status)
 				return status;
 			iattr->ia_valid |= (ATTR_MTIME | ATTR_MTIME_SET);
@@ -521,6 +512,7 @@ nfsd4_decode_access(struct nfsd4_compoundargs *argp, struct nfsd4_access *access
 static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_cb_sec *cbs)
 {
 	DECODE_HEAD;
+	struct user_namespace *userns = nfsd_user_namespace(argp->rqstp);
 	u32 dummy, uid, gid;
 	char *machine_name;
 	int i;
@@ -563,8 +555,8 @@ static __be32 nfsd4_decode_cb_sec(struct nfsd4_compoundargs *argp, struct nfsd4_
 			dummy = be32_to_cpup(p++);
 			READ_BUF(dummy * 4);
 			if (cbs->flavor == (u32)(-1)) {
-				kuid_t kuid = make_kuid(&init_user_ns, uid);
-				kgid_t kgid = make_kgid(&init_user_ns, gid);
+				kuid_t kuid = make_kuid(userns, uid);
+				kgid_t kgid = make_kgid(userns, gid);
 				if (uid_valid(kuid) && gid_valid(kgid)) {
 					cbs->uid = kuid;
 					cbs->gid = kgid;
@@ -1397,7 +1389,6 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
 		goto xdr_error;
 	}
 
-	/* Ignore Implementation ID */
 	READ_BUF(4);    /* nfs_impl_id4 array length */
 	dummy = be32_to_cpup(p++);
 
@@ -1405,21 +1396,19 @@ nfsd4_decode_exchange_id(struct nfsd4_compoundargs *argp,
 		goto xdr_error;
 
 	if (dummy == 1) {
-		/* nii_domain */
-		READ_BUF(4);
-		dummy = be32_to_cpup(p++);
-		READ_BUF(dummy);
-		p += XDR_QUADLEN(dummy);
+		status = nfsd4_decode_opaque(argp, &exid->nii_domain);
+		if (status)
+			goto xdr_error;
 
 		/* nii_name */
-		READ_BUF(4);
-		dummy = be32_to_cpup(p++);
-		READ_BUF(dummy);
-		p += XDR_QUADLEN(dummy);
+		status = nfsd4_decode_opaque(argp, &exid->nii_name);
+		if (status)
+			goto xdr_error;
 
 		/* nii_date */
-		READ_BUF(12);
-		p += 3;
+		status = nfsd4_decode_time(argp, &exid->nii_time);
+		if (status)
+			goto xdr_error;
 	}
 	DECODE_TAIL;
 }
@@ -2420,8 +2409,10 @@ nfsd4_encode_fattr(struct xdr_stream *xdr, struct svc_fh *fhp,
 	__be32 status;
 	int err;
 	struct nfs4_acl *acl = NULL;
+#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 	void *context = NULL;
 	int contextlen;
+#endif
 	bool contextsupport = false;
 	struct nfsd4_compoundres *resp = rqstp->rq_resp;
 	u32 minorversion = resp->cstate.minorversion;
@@ -2906,12 +2897,14 @@ out_acl:
 			*p++ = cpu_to_be32(NFS4_CHANGE_TYPE_IS_TIME_METADATA);
 	}
 
+#ifdef CONFIG_NFSD_V4_SECURITY_LABEL
 	if (bmval2 & FATTR4_WORD2_SECURITY_LABEL) {
 		status = nfsd4_encode_security_label(xdr, rqstp, context,
 								contextlen);
 		if (status)
 			goto out;
 	}
+#endif
 
 	attrlen = htonl(xdr->buf->len - attrlen_offset - 4);
 	write_bytes_to_xdr_buf(xdr->buf, attrlen_offset, &attrlen, 4);
diff --git a/fs/nfsd/nfscache.c b/fs/nfsd/nfscache.c
index da52b594362a..26ad75ae2be0 100644
--- a/fs/nfsd/nfscache.c
+++ b/fs/nfsd/nfscache.c
@@ -9,6 +9,7 @@
  * Copyright (C) 1995, 1996 Olaf Kirch <okir@monad.swb.de>
  */
 
+#include <linux/sunrpc/svc_xprt.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
 #include <linux/sunrpc/addr.h>
@@ -35,48 +36,12 @@ struct nfsd_drc_bucket {
 	spinlock_t cache_lock;
 };
 
-static struct nfsd_drc_bucket	*drc_hashtbl;
-static struct kmem_cache	*drc_slab;
-
-/* max number of entries allowed in the cache */
-static unsigned int		max_drc_entries;
-
-/* number of significant bits in the hash value */
-static unsigned int		maskbits;
-static unsigned int		drc_hashsize;
-
-/*
- * Stats and other tracking of on the duplicate reply cache. All of these and
- * the "rc" fields in nfsdstats are protected by the cache_lock
- */
-
-/* total number of entries */
-static atomic_t			num_drc_entries;
-
-/* cache misses due only to checksum comparison failures */
-static unsigned int		payload_misses;
-
-/* amount of memory (in bytes) currently consumed by the DRC */
-static unsigned int		drc_mem_usage;
-
-/* longest hash chain seen */
-static unsigned int		longest_chain;
-
-/* size of cache when we saw the longest hash chain */
-static unsigned int		longest_chain_cachesize;
-
 static int	nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *vec);
 static unsigned long nfsd_reply_cache_count(struct shrinker *shrink,
 					    struct shrink_control *sc);
 static unsigned long nfsd_reply_cache_scan(struct shrinker *shrink,
 					   struct shrink_control *sc);
 
-static struct shrinker nfsd_reply_cache_shrinker = {
-	.scan_objects = nfsd_reply_cache_scan,
-	.count_objects = nfsd_reply_cache_count,
-	.seeks	= 1,
-};
-
 /*
  * Put a cap on the size of the DRC based on the amount of available
  * low memory in the machine.
@@ -94,6 +59,9 @@ static struct shrinker nfsd_reply_cache_shrinker = {
  * ...with a hard cap of 256k entries. In the worst case, each entry will be
  * ~1k, so the above numbers should give a rough max of the amount of memory
  * used in k.
+ *
+ * XXX: these limits are per-container, so memory used will increase
+ * linearly with number of containers.  Maybe that's OK.
  */
 static unsigned int
 nfsd_cache_size_limit(void)
@@ -116,17 +84,18 @@ nfsd_hashsize(unsigned int limit)
 }
 
 static u32
-nfsd_cache_hash(__be32 xid)
+nfsd_cache_hash(__be32 xid, struct nfsd_net *nn)
 {
-	return hash_32(be32_to_cpu(xid), maskbits);
+	return hash_32(be32_to_cpu(xid), nn->maskbits);
 }
 
 static struct svc_cacherep *
-nfsd_reply_cache_alloc(struct svc_rqst *rqstp, __wsum csum)
+nfsd_reply_cache_alloc(struct svc_rqst *rqstp, __wsum csum,
+			struct nfsd_net *nn)
 {
 	struct svc_cacherep	*rp;
 
-	rp = kmem_cache_alloc(drc_slab, GFP_KERNEL);
+	rp = kmem_cache_alloc(nn->drc_slab, GFP_KERNEL);
 	if (rp) {
 		rp->c_state = RC_UNUSED;
 		rp->c_type = RC_NOCACHE;
@@ -147,91 +116,101 @@ nfsd_reply_cache_alloc(struct svc_rqst *rqstp, __wsum csum)
 }
 
 static void
-nfsd_reply_cache_free_locked(struct nfsd_drc_bucket *b, struct svc_cacherep *rp)
+nfsd_reply_cache_free_locked(struct nfsd_drc_bucket *b, struct svc_cacherep *rp,
+				struct nfsd_net *nn)
 {
 	if (rp->c_type == RC_REPLBUFF && rp->c_replvec.iov_base) {
-		drc_mem_usage -= rp->c_replvec.iov_len;
+		nn->drc_mem_usage -= rp->c_replvec.iov_len;
 		kfree(rp->c_replvec.iov_base);
 	}
 	if (rp->c_state != RC_UNUSED) {
 		rb_erase(&rp->c_node, &b->rb_head);
 		list_del(&rp->c_lru);
-		atomic_dec(&num_drc_entries);
-		drc_mem_usage -= sizeof(*rp);
+		atomic_dec(&nn->num_drc_entries);
+		nn->drc_mem_usage -= sizeof(*rp);
 	}
-	kmem_cache_free(drc_slab, rp);
+	kmem_cache_free(nn->drc_slab, rp);
 }
 
 static void
-nfsd_reply_cache_free(struct nfsd_drc_bucket *b, struct svc_cacherep *rp)
+nfsd_reply_cache_free(struct nfsd_drc_bucket *b, struct svc_cacherep *rp,
+			struct nfsd_net *nn)
 {
 	spin_lock(&b->cache_lock);
-	nfsd_reply_cache_free_locked(b, rp);
+	nfsd_reply_cache_free_locked(b, rp, nn);
 	spin_unlock(&b->cache_lock);
 }
 
-int nfsd_reply_cache_init(void)
+int nfsd_reply_cache_init(struct nfsd_net *nn)
 {
 	unsigned int hashsize;
 	unsigned int i;
 	int status = 0;
 
-	max_drc_entries = nfsd_cache_size_limit();
-	atomic_set(&num_drc_entries, 0);
-	hashsize = nfsd_hashsize(max_drc_entries);
-	maskbits = ilog2(hashsize);
+	nn->max_drc_entries = nfsd_cache_size_limit();
+	atomic_set(&nn->num_drc_entries, 0);
+	hashsize = nfsd_hashsize(nn->max_drc_entries);
+	nn->maskbits = ilog2(hashsize);
 
-	status = register_shrinker(&nfsd_reply_cache_shrinker);
+	nn->nfsd_reply_cache_shrinker.scan_objects = nfsd_reply_cache_scan;
+	nn->nfsd_reply_cache_shrinker.count_objects = nfsd_reply_cache_count;
+	nn->nfsd_reply_cache_shrinker.seeks = 1;
+	status = register_shrinker(&nn->nfsd_reply_cache_shrinker);
 	if (status)
-		return status;
-
-	drc_slab = kmem_cache_create("nfsd_drc", sizeof(struct svc_cacherep),
-					0, 0, NULL);
-	if (!drc_slab)
 		goto out_nomem;
 
-	drc_hashtbl = kcalloc(hashsize, sizeof(*drc_hashtbl), GFP_KERNEL);
-	if (!drc_hashtbl) {
-		drc_hashtbl = vzalloc(array_size(hashsize,
-						 sizeof(*drc_hashtbl)));
-		if (!drc_hashtbl)
-			goto out_nomem;
+	nn->drc_slab = kmem_cache_create("nfsd_drc",
+				sizeof(struct svc_cacherep), 0, 0, NULL);
+	if (!nn->drc_slab)
+		goto out_shrinker;
+
+	nn->drc_hashtbl = kcalloc(hashsize,
+				sizeof(*nn->drc_hashtbl), GFP_KERNEL);
+	if (!nn->drc_hashtbl) {
+		nn->drc_hashtbl = vzalloc(array_size(hashsize,
+						 sizeof(*nn->drc_hashtbl)));
+		if (!nn->drc_hashtbl)
+			goto out_slab;
 	}
 
 	for (i = 0; i < hashsize; i++) {
-		INIT_LIST_HEAD(&drc_hashtbl[i].lru_head);
-		spin_lock_init(&drc_hashtbl[i].cache_lock);
+		INIT_LIST_HEAD(&nn->drc_hashtbl[i].lru_head);
+		spin_lock_init(&nn->drc_hashtbl[i].cache_lock);
 	}
-	drc_hashsize = hashsize;
+	nn->drc_hashsize = hashsize;
 
 	return 0;
+out_slab:
+	kmem_cache_destroy(nn->drc_slab);
+out_shrinker:
+	unregister_shrinker(&nn->nfsd_reply_cache_shrinker);
 out_nomem:
 	printk(KERN_ERR "nfsd: failed to allocate reply cache\n");
-	nfsd_reply_cache_shutdown();
 	return -ENOMEM;
 }
 
-void nfsd_reply_cache_shutdown(void)
+void nfsd_reply_cache_shutdown(struct nfsd_net *nn)
 {
 	struct svc_cacherep	*rp;
 	unsigned int i;
 
-	unregister_shrinker(&nfsd_reply_cache_shrinker);
+	unregister_shrinker(&nn->nfsd_reply_cache_shrinker);
 
-	for (i = 0; i < drc_hashsize; i++) {
-		struct list_head *head = &drc_hashtbl[i].lru_head;
+	for (i = 0; i < nn->drc_hashsize; i++) {
+		struct list_head *head = &nn->drc_hashtbl[i].lru_head;
 		while (!list_empty(head)) {
 			rp = list_first_entry(head, struct svc_cacherep, c_lru);
-			nfsd_reply_cache_free_locked(&drc_hashtbl[i], rp);
+			nfsd_reply_cache_free_locked(&nn->drc_hashtbl[i],
+									rp, nn);
 		}
 	}
 
-	kvfree(drc_hashtbl);
-	drc_hashtbl = NULL;
-	drc_hashsize = 0;
+	kvfree(nn->drc_hashtbl);
+	nn->drc_hashtbl = NULL;
+	nn->drc_hashsize = 0;
 
-	kmem_cache_destroy(drc_slab);
-	drc_slab = NULL;
+	kmem_cache_destroy(nn->drc_slab);
+	nn->drc_slab = NULL;
 }
 
 /*
@@ -246,7 +225,7 @@ lru_put_end(struct nfsd_drc_bucket *b, struct svc_cacherep *rp)
 }
 
 static long
-prune_bucket(struct nfsd_drc_bucket *b)
+prune_bucket(struct nfsd_drc_bucket *b, struct nfsd_net *nn)
 {
 	struct svc_cacherep *rp, *tmp;
 	long freed = 0;
@@ -258,10 +237,10 @@ prune_bucket(struct nfsd_drc_bucket *b)
 		 */
 		if (rp->c_state == RC_INPROG)
 			continue;
-		if (atomic_read(&num_drc_entries) <= max_drc_entries &&
+		if (atomic_read(&nn->num_drc_entries) <= nn->max_drc_entries &&
 		    time_before(jiffies, rp->c_timestamp + RC_EXPIRE))
 			break;
-		nfsd_reply_cache_free_locked(b, rp);
+		nfsd_reply_cache_free_locked(b, rp, nn);
 		freed++;
 	}
 	return freed;
@@ -272,18 +251,18 @@ prune_bucket(struct nfsd_drc_bucket *b)
  * Also prune the oldest ones when the total exceeds the max number of entries.
  */
 static long
-prune_cache_entries(void)
+prune_cache_entries(struct nfsd_net *nn)
 {
 	unsigned int i;
 	long freed = 0;
 
-	for (i = 0; i < drc_hashsize; i++) {
-		struct nfsd_drc_bucket *b = &drc_hashtbl[i];
+	for (i = 0; i < nn->drc_hashsize; i++) {
+		struct nfsd_drc_bucket *b = &nn->drc_hashtbl[i];
 
 		if (list_empty(&b->lru_head))
 			continue;
 		spin_lock(&b->cache_lock);
-		freed += prune_bucket(b);
+		freed += prune_bucket(b, nn);
 		spin_unlock(&b->cache_lock);
 	}
 	return freed;
@@ -292,13 +271,19 @@ prune_cache_entries(void)
 static unsigned long
 nfsd_reply_cache_count(struct shrinker *shrink, struct shrink_control *sc)
 {
-	return atomic_read(&num_drc_entries);
+	struct nfsd_net *nn = container_of(shrink,
+				struct nfsd_net, nfsd_reply_cache_shrinker);
+
+	return atomic_read(&nn->num_drc_entries);
 }
 
 static unsigned long
 nfsd_reply_cache_scan(struct shrinker *shrink, struct shrink_control *sc)
 {
-	return prune_cache_entries();
+	struct nfsd_net *nn = container_of(shrink,
+				struct nfsd_net, nfsd_reply_cache_shrinker);
+
+	return prune_cache_entries(nn);
 }
 /*
  * Walk an xdr_buf and get a CRC for at most the first RC_CSUMLEN bytes
@@ -334,11 +319,12 @@ nfsd_cache_csum(struct svc_rqst *rqstp)
 }
 
 static int
-nfsd_cache_key_cmp(const struct svc_cacherep *key, const struct svc_cacherep *rp)
+nfsd_cache_key_cmp(const struct svc_cacherep *key,
+			const struct svc_cacherep *rp, struct nfsd_net *nn)
 {
 	if (key->c_key.k_xid == rp->c_key.k_xid &&
 	    key->c_key.k_csum != rp->c_key.k_csum)
-		++payload_misses;
+		++nn->payload_misses;
 
 	return memcmp(&key->c_key, &rp->c_key, sizeof(key->c_key));
 }
@@ -349,7 +335,8 @@ nfsd_cache_key_cmp(const struct svc_cacherep *key, const struct svc_cacherep *rp
  * inserts an empty key on failure.
  */
 static struct svc_cacherep *
-nfsd_cache_insert(struct nfsd_drc_bucket *b, struct svc_cacherep *key)
+nfsd_cache_insert(struct nfsd_drc_bucket *b, struct svc_cacherep *key,
+			struct nfsd_net *nn)
 {
 	struct svc_cacherep	*rp, *ret = key;
 	struct rb_node		**p = &b->rb_head.rb_node,
@@ -362,7 +349,7 @@ nfsd_cache_insert(struct nfsd_drc_bucket *b, struct svc_cacherep *key)
 		parent = *p;
 		rp = rb_entry(parent, struct svc_cacherep, c_node);
 
-		cmp = nfsd_cache_key_cmp(key, rp);
+		cmp = nfsd_cache_key_cmp(key, rp, nn);
 		if (cmp < 0)
 			p = &parent->rb_left;
 		else if (cmp > 0)
@@ -376,14 +363,14 @@ nfsd_cache_insert(struct nfsd_drc_bucket *b, struct svc_cacherep *key)
 	rb_insert_color(&key->c_node, &b->rb_head);
 out:
 	/* tally hash chain length stats */
-	if (entries > longest_chain) {
-		longest_chain = entries;
-		longest_chain_cachesize = atomic_read(&num_drc_entries);
-	} else if (entries == longest_chain) {
+	if (entries > nn->longest_chain) {
+		nn->longest_chain = entries;
+		nn->longest_chain_cachesize = atomic_read(&nn->num_drc_entries);
+	} else if (entries == nn->longest_chain) {
 		/* prefer to keep the smallest cachesize possible here */
-		longest_chain_cachesize = min_t(unsigned int,
-				longest_chain_cachesize,
-				atomic_read(&num_drc_entries));
+		nn->longest_chain_cachesize = min_t(unsigned int,
+				nn->longest_chain_cachesize,
+				atomic_read(&nn->num_drc_entries));
 	}
 
 	lru_put_end(b, ret);
@@ -400,11 +387,12 @@ out:
 int
 nfsd_cache_lookup(struct svc_rqst *rqstp)
 {
+	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
 	struct svc_cacherep	*rp, *found;
 	__be32			xid = rqstp->rq_xid;
 	__wsum			csum;
-	u32 hash = nfsd_cache_hash(xid);
-	struct nfsd_drc_bucket *b = &drc_hashtbl[hash];
+	u32 hash = nfsd_cache_hash(xid, nn);
+	struct nfsd_drc_bucket *b = &nn->drc_hashtbl[hash];
 	int type = rqstp->rq_cachetype;
 	int rtn = RC_DOIT;
 
@@ -420,16 +408,16 @@ nfsd_cache_lookup(struct svc_rqst *rqstp)
 	 * Since the common case is a cache miss followed by an insert,
 	 * preallocate an entry.
 	 */
-	rp = nfsd_reply_cache_alloc(rqstp, csum);
+	rp = nfsd_reply_cache_alloc(rqstp, csum, nn);
 	if (!rp) {
 		dprintk("nfsd: unable to allocate DRC entry!\n");
 		return rtn;
 	}
 
 	spin_lock(&b->cache_lock);
-	found = nfsd_cache_insert(b, rp);
+	found = nfsd_cache_insert(b, rp, nn);
 	if (found != rp) {
-		nfsd_reply_cache_free_locked(NULL, rp);
+		nfsd_reply_cache_free_locked(NULL, rp, nn);
 		rp = found;
 		goto found_entry;
 	}
@@ -438,11 +426,11 @@ nfsd_cache_lookup(struct svc_rqst *rqstp)
 	rqstp->rq_cacherep = rp;
 	rp->c_state = RC_INPROG;
 
-	atomic_inc(&num_drc_entries);
-	drc_mem_usage += sizeof(*rp);
+	atomic_inc(&nn->num_drc_entries);
+	nn->drc_mem_usage += sizeof(*rp);
 
 	/* go ahead and prune the cache */
-	prune_bucket(b);
+	prune_bucket(b, nn);
  out:
 	spin_unlock(&b->cache_lock);
 	return rtn;
@@ -477,7 +465,7 @@ found_entry:
 		break;
 	default:
 		printk(KERN_WARNING "nfsd: bad repcache type %d\n", rp->c_type);
-		nfsd_reply_cache_free_locked(b, rp);
+		nfsd_reply_cache_free_locked(b, rp, nn);
 	}
 
 	goto out;
@@ -502,6 +490,7 @@ found_entry:
 void
 nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
 {
+	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
 	struct svc_cacherep *rp = rqstp->rq_cacherep;
 	struct kvec	*resv = &rqstp->rq_res.head[0], *cachv;
 	u32		hash;
@@ -512,15 +501,15 @@ nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
 	if (!rp)
 		return;
 
-	hash = nfsd_cache_hash(rp->c_key.k_xid);
-	b = &drc_hashtbl[hash];
+	hash = nfsd_cache_hash(rp->c_key.k_xid, nn);
+	b = &nn->drc_hashtbl[hash];
 
 	len = resv->iov_len - ((char*)statp - (char*)resv->iov_base);
 	len >>= 2;
 
 	/* Don't cache excessive amounts of data and XDR failures */
 	if (!statp || len > (256 >> 2)) {
-		nfsd_reply_cache_free(b, rp);
+		nfsd_reply_cache_free(b, rp, nn);
 		return;
 	}
 
@@ -535,18 +524,18 @@ nfsd_cache_update(struct svc_rqst *rqstp, int cachetype, __be32 *statp)
 		bufsize = len << 2;
 		cachv->iov_base = kmalloc(bufsize, GFP_KERNEL);
 		if (!cachv->iov_base) {
-			nfsd_reply_cache_free(b, rp);
+			nfsd_reply_cache_free(b, rp, nn);
 			return;
 		}
 		cachv->iov_len = bufsize;
 		memcpy(cachv->iov_base, statp, bufsize);
 		break;
 	case RC_NOCACHE:
-		nfsd_reply_cache_free(b, rp);
+		nfsd_reply_cache_free(b, rp, nn);
 		return;
 	}
 	spin_lock(&b->cache_lock);
-	drc_mem_usage += bufsize;
+	nn->drc_mem_usage += bufsize;
 	lru_put_end(b, rp);
 	rp->c_secure = test_bit(RQ_SECURE, &rqstp->rq_flags);
 	rp->c_type = cachetype;
@@ -582,21 +571,26 @@ nfsd_cache_append(struct svc_rqst *rqstp, struct kvec *data)
  */
 static int nfsd_reply_cache_stats_show(struct seq_file *m, void *v)
 {
-	seq_printf(m, "max entries:           %u\n", max_drc_entries);
+	struct nfsd_net *nn = v;
+
+	seq_printf(m, "max entries:           %u\n", nn->max_drc_entries);
 	seq_printf(m, "num entries:           %u\n",
-			atomic_read(&num_drc_entries));
-	seq_printf(m, "hash buckets:          %u\n", 1 << maskbits);
-	seq_printf(m, "mem usage:             %u\n", drc_mem_usage);
+			atomic_read(&nn->num_drc_entries));
+	seq_printf(m, "hash buckets:          %u\n", 1 << nn->maskbits);
+	seq_printf(m, "mem usage:             %u\n", nn->drc_mem_usage);
 	seq_printf(m, "cache hits:            %u\n", nfsdstats.rchits);
 	seq_printf(m, "cache misses:          %u\n", nfsdstats.rcmisses);
 	seq_printf(m, "not cached:            %u\n", nfsdstats.rcnocache);
-	seq_printf(m, "payload misses:        %u\n", payload_misses);
-	seq_printf(m, "longest chain len:     %u\n", longest_chain);
-	seq_printf(m, "cachesize at longest:  %u\n", longest_chain_cachesize);
+	seq_printf(m, "payload misses:        %u\n", nn->payload_misses);
+	seq_printf(m, "longest chain len:     %u\n", nn->longest_chain);
+	seq_printf(m, "cachesize at longest:  %u\n", nn->longest_chain_cachesize);
 	return 0;
 }
 
 int nfsd_reply_cache_stats_open(struct inode *inode, struct file *file)
 {
-	return single_open(file, nfsd_reply_cache_stats_show, NULL);
+	struct nfsd_net *nn = net_generic(file_inode(file)->i_sb->s_fs_info,
+								nfsd_net_id);
+
+	return single_open(file, nfsd_reply_cache_stats_show, nn);
 }
diff --git a/fs/nfsd/nfsctl.c b/fs/nfsd/nfsctl.c
index b33f9785b756..0a9a49ded546 100644
--- a/fs/nfsd/nfsctl.c
+++ b/fs/nfsd/nfsctl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Syscall interface to knfsd.
  *
@@ -15,6 +16,7 @@
 #include <linux/sunrpc/gss_krb5_enctypes.h>
 #include <linux/sunrpc/rpc_pipe_fs.h>
 #include <linux/module.h>
+#include <linux/fsnotify.h>
 
 #include "idmap.h"
 #include "nfsd.h"
@@ -52,6 +54,7 @@ enum {
 	NFSD_RecoveryDir,
 	NFSD_V4EndGrace,
 #endif
+	NFSD_MaxReserved
 };
 
 /*
@@ -439,7 +442,7 @@ static ssize_t write_threads(struct file *file, char *buf, size_t size)
 			return rv;
 		if (newthreads < 0)
 			return -EINVAL;
-		rv = nfsd_svc(newthreads, net);
+		rv = nfsd_svc(newthreads, net, file->f_cred);
 		if (rv < 0)
 			return rv;
 	} else
@@ -537,14 +540,14 @@ out_free:
 }
 
 static ssize_t
-nfsd_print_version_support(char *buf, int remaining, const char *sep,
-		unsigned vers, int minor)
+nfsd_print_version_support(struct nfsd_net *nn, char *buf, int remaining,
+		const char *sep, unsigned vers, int minor)
 {
 	const char *format = minor < 0 ? "%s%c%u" : "%s%c%u.%u";
-	bool supported = !!nfsd_vers(vers, NFSD_TEST);
+	bool supported = !!nfsd_vers(nn, vers, NFSD_TEST);
 
 	if (vers == 4 && minor >= 0 &&
-	    !nfsd_minorversion(minor, NFSD_TEST))
+	    !nfsd_minorversion(nn, minor, NFSD_TEST))
 		supported = false;
 	if (minor == 0 && supported)
 		/*
@@ -599,20 +602,20 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
 			switch(num) {
 			case 2:
 			case 3:
-				nfsd_vers(num, cmd);
+				nfsd_vers(nn, num, cmd);
 				break;
 			case 4:
 				if (*minorp == '.') {
-					if (nfsd_minorversion(minor, cmd) < 0)
+					if (nfsd_minorversion(nn, minor, cmd) < 0)
 						return -EINVAL;
-				} else if ((cmd == NFSD_SET) != nfsd_vers(num, NFSD_TEST)) {
+				} else if ((cmd == NFSD_SET) != nfsd_vers(nn, num, NFSD_TEST)) {
 					/*
 					 * Either we have +4 and no minors are enabled,
 					 * or we have -4 and at least one minor is enabled.
 					 * In either case, propagate 'cmd' to all minors.
 					 */
 					minor = 0;
-					while (nfsd_minorversion(minor, cmd) >= 0)
+					while (nfsd_minorversion(nn, minor, cmd) >= 0)
 						minor++;
 				}
 				break;
@@ -624,7 +627,7 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
 		/* If all get turned off, turn them back on, as
 		 * having no versions is BAD
 		 */
-		nfsd_reset_versions();
+		nfsd_reset_versions(nn);
 	}
 
 	/* Now write current state into reply buffer */
@@ -633,12 +636,12 @@ static ssize_t __write_versions(struct file *file, char *buf, size_t size)
 	remaining = SIMPLE_TRANSACTION_LIMIT;
 	for (num=2 ; num <= 4 ; num++) {
 		int minor;
-		if (!nfsd_vers(num, NFSD_AVAIL))
+		if (!nfsd_vers(nn, num, NFSD_AVAIL))
 			continue;
 
 		minor = -1;
 		do {
-			len = nfsd_print_version_support(buf, remaining,
+			len = nfsd_print_version_support(nn, buf, remaining,
 					sep, num, minor);
 			if (len >= remaining)
 				goto out;
@@ -717,7 +720,7 @@ static ssize_t __write_ports_names(char *buf, struct net *net)
  * a socket of a supported family/protocol, and we use it as an
  * nfsd listener.
  */
-static ssize_t __write_ports_addfd(char *buf, struct net *net)
+static ssize_t __write_ports_addfd(char *buf, struct net *net, const struct cred *cred)
 {
 	char *mesg = buf;
 	int fd, err;
@@ -736,7 +739,7 @@ static ssize_t __write_ports_addfd(char *buf, struct net *net)
 	if (err != 0)
 		return err;
 
-	err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT);
+	err = svc_addsock(nn->nfsd_serv, fd, buf, SIMPLE_TRANSACTION_LIMIT, cred);
 	if (err < 0) {
 		nfsd_destroy(net);
 		return err;
@@ -751,7 +754,7 @@ static ssize_t __write_ports_addfd(char *buf, struct net *net)
  * A transport listener is added by writing it's transport name and
  * a port number.
  */
-static ssize_t __write_ports_addxprt(char *buf, struct net *net)
+static ssize_t __write_ports_addxprt(char *buf, struct net *net, const struct cred *cred)
 {
 	char transport[16];
 	struct svc_xprt *xprt;
@@ -769,12 +772,12 @@ static ssize_t __write_ports_addxprt(char *buf, struct net *net)
 		return err;
 
 	err = svc_create_xprt(nn->nfsd_serv, transport, net,
-				PF_INET, port, SVC_SOCK_ANONYMOUS);
+				PF_INET, port, SVC_SOCK_ANONYMOUS, cred);
 	if (err < 0)
 		goto out_err;
 
 	err = svc_create_xprt(nn->nfsd_serv, transport, net,
-				PF_INET6, port, SVC_SOCK_ANONYMOUS);
+				PF_INET6, port, SVC_SOCK_ANONYMOUS, cred);
 	if (err < 0 && err != -EAFNOSUPPORT)
 		goto out_close;
 
@@ -799,10 +802,10 @@ static ssize_t __write_ports(struct file *file, char *buf, size_t size,
 		return __write_ports_names(buf, net);
 
 	if (isdigit(buf[0]))
-		return __write_ports_addfd(buf, net);
+		return __write_ports_addfd(buf, net, file->f_cred);
 
 	if (isalpha(buf[0]))
-		return __write_ports_addxprt(buf, net);
+		return __write_ports_addxprt(buf, net, file->f_cred);
 
 	return -EINVAL;
 }
@@ -1126,7 +1129,7 @@ static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size)
 		case 'Y':
 		case 'y':
 		case '1':
-			if (nn->nfsd_serv)
+			if (!nn->nfsd_serv)
 				return -EBUSY;
 			nfsd4_end_grace(nn);
 			break;
@@ -1146,8 +1149,201 @@ static ssize_t write_v4_end_grace(struct file *file, char *buf, size_t size)
  *	populating the filesystem.
  */
 
+/* Basically copying rpc_get_inode. */
+static struct inode *nfsd_get_inode(struct super_block *sb, umode_t mode)
+{
+	struct inode *inode = new_inode(sb);
+	if (!inode)
+		return NULL;
+	/* Following advice from simple_fill_super documentation: */
+	inode->i_ino = iunique(sb, NFSD_MaxReserved);
+	inode->i_mode = mode;
+	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
+	switch (mode & S_IFMT) {
+	case S_IFDIR:
+		inode->i_fop = &simple_dir_operations;
+		inode->i_op = &simple_dir_inode_operations;
+		inc_nlink(inode);
+	default:
+		break;
+	}
+	return inode;
+}
+
+static int __nfsd_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode)
+{
+	struct inode *inode;
+
+	inode = nfsd_get_inode(dir->i_sb, mode);
+	if (!inode)
+		return -ENOMEM;
+	d_add(dentry, inode);
+	inc_nlink(dir);
+	fsnotify_mkdir(dir, dentry);
+	return 0;
+}
+
+static struct dentry *nfsd_mkdir(struct dentry *parent, struct nfsdfs_client *ncl, char *name)
+{
+	struct inode *dir = parent->d_inode;
+	struct dentry *dentry;
+	int ret = -ENOMEM;
+
+	inode_lock(dir);
+	dentry = d_alloc_name(parent, name);
+	if (!dentry)
+		goto out_err;
+	ret = __nfsd_mkdir(d_inode(parent), dentry, S_IFDIR | 0600);
+	if (ret)
+		goto out_err;
+	if (ncl) {
+		d_inode(dentry)->i_private = ncl;
+		kref_get(&ncl->cl_ref);
+	}
+out:
+	inode_unlock(dir);
+	return dentry;
+out_err:
+	dentry = ERR_PTR(ret);
+	goto out;
+}
+
+static void clear_ncl(struct inode *inode)
+{
+	struct nfsdfs_client *ncl = inode->i_private;
+
+	inode->i_private = NULL;
+	synchronize_rcu();
+	kref_put(&ncl->cl_ref, ncl->cl_release);
+}
+
+
+static struct nfsdfs_client *__get_nfsdfs_client(struct inode *inode)
+{
+	struct nfsdfs_client *nc = inode->i_private;
+
+	if (nc)
+		kref_get(&nc->cl_ref);
+	return nc;
+}
+
+struct nfsdfs_client *get_nfsdfs_client(struct inode *inode)
+{
+	struct nfsdfs_client *nc;
+
+	rcu_read_lock();
+	nc = __get_nfsdfs_client(inode);
+	rcu_read_unlock();
+	return nc;
+}
+/* from __rpc_unlink */
+static void nfsdfs_remove_file(struct inode *dir, struct dentry *dentry)
+{
+	int ret;
+
+	clear_ncl(d_inode(dentry));
+	dget(dentry);
+	ret = simple_unlink(dir, dentry);
+	d_delete(dentry);
+	dput(dentry);
+	WARN_ON_ONCE(ret);
+}
+
+static void nfsdfs_remove_files(struct dentry *root)
+{
+	struct dentry *dentry, *tmp;
+
+	list_for_each_entry_safe(dentry, tmp, &root->d_subdirs, d_child) {
+		if (!simple_positive(dentry)) {
+			WARN_ON_ONCE(1); /* I think this can't happen? */
+			continue;
+		}
+		nfsdfs_remove_file(d_inode(root), dentry);
+	}
+}
+
+/* XXX: cut'n'paste from simple_fill_super; figure out if we could share
+ * code instead. */
+static  int nfsdfs_create_files(struct dentry *root,
+					const struct tree_descr *files)
+{
+	struct inode *dir = d_inode(root);
+	struct inode *inode;
+	struct dentry *dentry;
+	int i;
+
+	inode_lock(dir);
+	for (i = 0; files->name && files->name[0]; i++, files++) {
+		if (!files->name)
+			continue;
+		dentry = d_alloc_name(root, files->name);
+		if (!dentry)
+			goto out;
+		inode = nfsd_get_inode(d_inode(root)->i_sb,
+					S_IFREG | files->mode);
+		if (!inode) {
+			dput(dentry);
+			goto out;
+		}
+		inode->i_fop = files->ops;
+		inode->i_private = __get_nfsdfs_client(dir);
+		d_add(dentry, inode);
+		fsnotify_create(dir, dentry);
+	}
+	inode_unlock(dir);
+	return 0;
+out:
+	nfsdfs_remove_files(root);
+	inode_unlock(dir);
+	return -ENOMEM;
+}
+
+/* on success, returns positive number unique to that client. */
+struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
+		struct nfsdfs_client *ncl, u32 id,
+		const struct tree_descr *files)
+{
+	struct dentry *dentry;
+	char name[11];
+	int ret;
+
+	sprintf(name, "%u", id);
+
+	dentry = nfsd_mkdir(nn->nfsd_client_dir, ncl, name);
+	if (IS_ERR(dentry)) /* XXX: tossing errors? */
+		return NULL;
+	ret = nfsdfs_create_files(dentry, files);
+	if (ret) {
+		nfsd_client_rmdir(dentry);
+		return NULL;
+	}
+	return dentry;
+}
+
+/* Taken from __rpc_rmdir: */
+void nfsd_client_rmdir(struct dentry *dentry)
+{
+	struct inode *dir = d_inode(dentry->d_parent);
+	struct inode *inode = d_inode(dentry);
+	int ret;
+
+	inode_lock(dir);
+	nfsdfs_remove_files(dentry);
+	clear_ncl(inode);
+	dget(dentry);
+	ret = simple_rmdir(dir, dentry);
+	WARN_ON_ONCE(ret);
+	d_delete(dentry);
+	inode_unlock(dir);
+}
+
 static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
 {
+	struct nfsd_net *nn = net_generic(current->nsproxy->net_ns,
+							nfsd_net_id);
+	struct dentry *dentry;
+	int ret;
+
 	static const struct tree_descr nfsd_files[] = {
 		[NFSD_List] = {"exports", &exports_nfsd_operations, S_IRUGO},
 		[NFSD_Export_features] = {"export_features",
@@ -1177,7 +1373,15 @@ static int nfsd_fill_super(struct super_block * sb, void * data, int silent)
 		/* last one */ {""}
 	};
 	get_net(sb->s_fs_info);
-	return simple_fill_super(sb, 0x6e667364, nfsd_files);
+	ret = simple_fill_super(sb, 0x6e667364, nfsd_files);
+	if (ret)
+		return ret;
+	dentry = nfsd_mkdir(sb->s_root, NULL, "clients");
+	if (IS_ERR(dentry))
+		return PTR_ERR(dentry);
+	nn->nfsd_client_dir = dentry;
+	return 0;
+
 }
 
 static struct dentry *nfsd_mount(struct file_system_type *fs_type,
@@ -1231,6 +1435,7 @@ unsigned int nfsd_net_id;
 static __net_init int nfsd_init_net(struct net *net)
 {
 	int retval;
+	struct vfsmount *mnt;
 	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 
 	retval = nfsd_export_init(net);
@@ -1239,17 +1444,35 @@ static __net_init int nfsd_init_net(struct net *net)
 	retval = nfsd_idmap_init(net);
 	if (retval)
 		goto out_idmap_error;
-	nn->nfsd4_lease = 45;	/* default lease time */
-	nn->nfsd4_grace = 45;
+	nn->nfsd_versions = NULL;
+	nn->nfsd4_minorversions = NULL;
+	retval = nfsd_reply_cache_init(nn);
+	if (retval)
+		goto out_drc_error;
+	nn->nfsd4_lease = 90;	/* default lease time */
+	nn->nfsd4_grace = 90;
 	nn->somebody_reclaimed = false;
+	nn->track_reclaim_completes = false;
 	nn->clverifier_counter = prandom_u32();
-	nn->clientid_counter = prandom_u32();
+	nn->clientid_base = prandom_u32();
+	nn->clientid_counter = nn->clientid_base + 1;
 	nn->s2s_cp_cl_id = nn->clientid_counter++;
 
 	atomic_set(&nn->ntf_refcnt, 0);
 	init_waitqueue_head(&nn->ntf_wq);
+
+	mnt =  vfs_kern_mount(&nfsd_fs_type, SB_KERNMOUNT, "nfsd", NULL);
+	if (IS_ERR(mnt)) {
+		retval = PTR_ERR(mnt);
+		goto out_mount_err;
+	}
+	nn->nfsd_mnt = mnt;
 	return 0;
 
+out_mount_err:
+	nfsd_reply_cache_shutdown(nn);
+out_drc_error:
+	nfsd_idmap_shutdown(net);
 out_idmap_error:
 	nfsd_export_shutdown(net);
 out_export_error:
@@ -1258,8 +1481,13 @@ out_export_error:
 
 static __net_exit void nfsd_exit_net(struct net *net)
 {
+	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
+
+	mntput(nn->nfsd_mnt);
+	nfsd_reply_cache_shutdown(nn);
 	nfsd_idmap_shutdown(net);
 	nfsd_export_shutdown(net);
+	nfsd_netns_free_versions(net_generic(net, nfsd_net_id));
 }
 
 static struct pernet_operations nfsd_net_ops = {
@@ -1286,13 +1514,8 @@ static int __init init_nfsd(void)
 	retval = nfsd4_init_pnfs();
 	if (retval)
 		goto out_free_slabs;
-	retval = nfsd_fault_inject_init(); /* nfsd fault injection controls */
-	if (retval)
-		goto out_exit_pnfs;
+	nfsd_fault_inject_init(); /* nfsd fault injection controls */
 	nfsd_stat_init();	/* Statistics */
-	retval = nfsd_reply_cache_init();
-	if (retval)
-		goto out_free_stat;
 	nfsd_lockd_init();	/* lockd->nfsd callbacks */
 	retval = create_proc_exports_entry();
 	if (retval)
@@ -1306,11 +1529,8 @@ out_free_all:
 	remove_proc_entry("fs/nfs", NULL);
 out_free_lockd:
 	nfsd_lockd_shutdown();
-	nfsd_reply_cache_shutdown();
-out_free_stat:
 	nfsd_stat_shutdown();
 	nfsd_fault_inject_cleanup();
-out_exit_pnfs:
 	nfsd4_exit_pnfs();
 out_free_slabs:
 	nfsd4_free_slabs();
@@ -1323,7 +1543,6 @@ out_unregister_pernet:
 
 static void __exit exit_nfsd(void)
 {
-	nfsd_reply_cache_shutdown();
 	remove_proc_entry("fs/nfs/exports", NULL);
 	remove_proc_entry("fs/nfs", NULL);
 	nfsd_stat_shutdown();
diff --git a/fs/nfsd/nfsd.h b/fs/nfsd/nfsd.h
index 066899929863..af2947551e9c 100644
--- a/fs/nfsd/nfsd.h
+++ b/fs/nfsd/nfsd.h
@@ -17,10 +17,12 @@
 #include <linux/nfs3.h>
 #include <linux/nfs4.h>
 #include <linux/sunrpc/svc.h>
+#include <linux/sunrpc/svc_xprt.h>
 #include <linux/sunrpc/msg_prot.h>
 
 #include <uapi/linux/nfsd/debug.h>
 
+#include "netns.h"
 #include "stats.h"
 #include "export.h"
 
@@ -73,7 +75,7 @@ extern const struct seq_operations nfs_exports_op;
 /*
  * Function prototypes.
  */
-int		nfsd_svc(int nrservs, struct net *net);
+int		nfsd_svc(int nrservs, struct net *net, const struct cred *cred);
 int		nfsd_dispatch(struct svc_rqst *rqstp, __be32 *statp);
 
 int		nfsd_nrthreads(struct net *);
@@ -85,6 +87,16 @@ int		nfsd_pool_stats_release(struct inode *, struct file *);
 
 void		nfsd_destroy(struct net *net);
 
+struct nfsdfs_client {
+	struct kref cl_ref;
+	void (*cl_release)(struct kref *kref);
+};
+
+struct nfsdfs_client *get_nfsdfs_client(struct inode *);
+struct dentry *nfsd_client_mkdir(struct nfsd_net *nn,
+		struct nfsdfs_client *ncl, u32 id, const struct tree_descr *);
+void nfsd_client_rmdir(struct dentry *dentry);
+
 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
 #ifdef CONFIG_NFSD_V2_ACL
 extern const struct svc_version nfsd_acl_version2;
@@ -98,10 +110,12 @@ extern const struct svc_version nfsd_acl_version3;
 #endif
 #endif
 
+struct nfsd_net;
+
 enum vers_op {NFSD_SET, NFSD_CLEAR, NFSD_TEST, NFSD_AVAIL };
-int nfsd_vers(int vers, enum vers_op change);
-int nfsd_minorversion(u32 minorversion, enum vers_op change);
-void nfsd_reset_versions(void);
+int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change);
+int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change);
+void nfsd_reset_versions(struct nfsd_net *nn);
 int nfsd_create_serv(struct net *net);
 
 extern int nfsd_max_blksize;
@@ -110,6 +124,12 @@ static inline int nfsd_v4client(struct svc_rqst *rq)
 {
 	return rq->rq_prog == NFS_PROGRAM && rq->rq_vers == 4;
 }
+static inline struct user_namespace *
+nfsd_user_namespace(const struct svc_rqst *rqstp)
+{
+	const struct cred *cred = rqstp->rq_xprt->xpt_cred;
+	return cred ? cred->user_ns : &init_user_ns;
+}
 
 /* 
  * NFSv4 State
diff --git a/fs/nfsd/nfssvc.c b/fs/nfsd/nfssvc.c
index 89cb484f1cfb..18d94ea984ba 100644
--- a/fs/nfsd/nfssvc.c
+++ b/fs/nfsd/nfssvc.c
@@ -32,6 +32,24 @@
 
 extern struct svc_program	nfsd_program;
 static int			nfsd(void *vrqstp);
+#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
+static int			nfsd_acl_rpcbind_set(struct net *,
+						     const struct svc_program *,
+						     u32, int,
+						     unsigned short,
+						     unsigned short);
+static __be32			nfsd_acl_init_request(struct svc_rqst *,
+						const struct svc_program *,
+						struct svc_process_info *);
+#endif
+static int			nfsd_rpcbind_set(struct net *,
+						 const struct svc_program *,
+						 u32, int,
+						 unsigned short,
+						 unsigned short);
+static __be32			nfsd_init_request(struct svc_rqst *,
+						const struct svc_program *,
+						struct svc_process_info *);
 
 /*
  * nfsd_mutex protects nn->nfsd_serv -- both the pointer itself and the members
@@ -86,6 +104,8 @@ static struct svc_program	nfsd_acl_program = {
 	.pg_class		= "nfsd",
 	.pg_stats		= &nfsd_acl_svcstats,
 	.pg_authenticate	= &svc_set_client,
+	.pg_init_request	= nfsd_acl_init_request,
+	.pg_rpcbind_set		= nfsd_acl_rpcbind_set,
 };
 
 static struct svc_stat	nfsd_acl_svcstats = {
@@ -105,7 +125,6 @@ static const struct svc_version *nfsd_version[] = {
 
 #define NFSD_MINVERS    	2
 #define NFSD_NRVERS		ARRAY_SIZE(nfsd_version)
-static const struct svc_version *nfsd_versions[NFSD_NRVERS];
 
 struct svc_program		nfsd_program = {
 #if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
@@ -113,77 +132,136 @@ struct svc_program		nfsd_program = {
 #endif
 	.pg_prog		= NFS_PROGRAM,		/* program number */
 	.pg_nvers		= NFSD_NRVERS,		/* nr of entries in nfsd_version */
-	.pg_vers		= nfsd_versions,	/* version table */
+	.pg_vers		= nfsd_version,		/* version table */
 	.pg_name		= "nfsd",		/* program name */
 	.pg_class		= "nfsd",		/* authentication class */
 	.pg_stats		= &nfsd_svcstats,	/* version table */
 	.pg_authenticate	= &svc_set_client,	/* export authentication */
-
+	.pg_init_request	= nfsd_init_request,
+	.pg_rpcbind_set		= nfsd_rpcbind_set,
 };
 
-static bool nfsd_supported_minorversions[NFSD_SUPPORTED_MINOR_VERSION + 1] = {
-	[0] = 1,
-	[1] = 1,
-	[2] = 1,
-};
+static bool
+nfsd_support_version(int vers)
+{
+	if (vers >= NFSD_MINVERS && vers < NFSD_NRVERS)
+		return nfsd_version[vers] != NULL;
+	return false;
+}
+
+static bool *
+nfsd_alloc_versions(void)
+{
+	bool *vers = kmalloc_array(NFSD_NRVERS, sizeof(bool), GFP_KERNEL);
+	unsigned i;
+
+	if (vers) {
+		/* All compiled versions are enabled by default */
+		for (i = 0; i < NFSD_NRVERS; i++)
+			vers[i] = nfsd_support_version(i);
+	}
+	return vers;
+}
+
+static bool *
+nfsd_alloc_minorversions(void)
+{
+	bool *vers = kmalloc_array(NFSD_SUPPORTED_MINOR_VERSION + 1,
+			sizeof(bool), GFP_KERNEL);
+	unsigned i;
+
+	if (vers) {
+		/* All minor versions are enabled by default */
+		for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++)
+			vers[i] = nfsd_support_version(4);
+	}
+	return vers;
+}
 
-int nfsd_vers(int vers, enum vers_op change)
+void
+nfsd_netns_free_versions(struct nfsd_net *nn)
+{
+	kfree(nn->nfsd_versions);
+	kfree(nn->nfsd4_minorversions);
+	nn->nfsd_versions = NULL;
+	nn->nfsd4_minorversions = NULL;
+}
+
+static void
+nfsd_netns_init_versions(struct nfsd_net *nn)
+{
+	if (!nn->nfsd_versions) {
+		nn->nfsd_versions = nfsd_alloc_versions();
+		nn->nfsd4_minorversions = nfsd_alloc_minorversions();
+		if (!nn->nfsd_versions || !nn->nfsd4_minorversions)
+			nfsd_netns_free_versions(nn);
+	}
+}
+
+int nfsd_vers(struct nfsd_net *nn, int vers, enum vers_op change)
 {
 	if (vers < NFSD_MINVERS || vers >= NFSD_NRVERS)
 		return 0;
 	switch(change) {
 	case NFSD_SET:
-		nfsd_versions[vers] = nfsd_version[vers];
-#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
-		if (vers < NFSD_ACL_NRVERS)
-			nfsd_acl_versions[vers] = nfsd_acl_version[vers];
-#endif
+		if (nn->nfsd_versions)
+			nn->nfsd_versions[vers] = nfsd_support_version(vers);
 		break;
 	case NFSD_CLEAR:
-		nfsd_versions[vers] = NULL;
-#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
-		if (vers < NFSD_ACL_NRVERS)
-			nfsd_acl_versions[vers] = NULL;
-#endif
+		nfsd_netns_init_versions(nn);
+		if (nn->nfsd_versions)
+			nn->nfsd_versions[vers] = false;
 		break;
 	case NFSD_TEST:
-		return nfsd_versions[vers] != NULL;
+		if (nn->nfsd_versions)
+			return nn->nfsd_versions[vers];
+		/* Fallthrough */
 	case NFSD_AVAIL:
-		return nfsd_version[vers] != NULL;
+		return nfsd_support_version(vers);
 	}
 	return 0;
 }
 
 static void
-nfsd_adjust_nfsd_versions4(void)
+nfsd_adjust_nfsd_versions4(struct nfsd_net *nn)
 {
 	unsigned i;
 
 	for (i = 0; i <= NFSD_SUPPORTED_MINOR_VERSION; i++) {
-		if (nfsd_supported_minorversions[i])
+		if (nn->nfsd4_minorversions[i])
 			return;
 	}
-	nfsd_vers(4, NFSD_CLEAR);
+	nfsd_vers(nn, 4, NFSD_CLEAR);
 }
 
-int nfsd_minorversion(u32 minorversion, enum vers_op change)
+int nfsd_minorversion(struct nfsd_net *nn, u32 minorversion, enum vers_op change)
 {
 	if (minorversion > NFSD_SUPPORTED_MINOR_VERSION &&
 	    change != NFSD_AVAIL)
 		return -1;
+
 	switch(change) {
 	case NFSD_SET:
-		nfsd_supported_minorversions[minorversion] = true;
-		nfsd_vers(4, NFSD_SET);
+		if (nn->nfsd4_minorversions) {
+			nfsd_vers(nn, 4, NFSD_SET);
+			nn->nfsd4_minorversions[minorversion] =
+				nfsd_vers(nn, 4, NFSD_TEST);
+		}
 		break;
 	case NFSD_CLEAR:
-		nfsd_supported_minorversions[minorversion] = false;
-		nfsd_adjust_nfsd_versions4();
+		nfsd_netns_init_versions(nn);
+		if (nn->nfsd4_minorversions) {
+			nn->nfsd4_minorversions[minorversion] = false;
+			nfsd_adjust_nfsd_versions4(nn);
+		}
 		break;
 	case NFSD_TEST:
-		return nfsd_supported_minorversions[minorversion];
+		if (nn->nfsd4_minorversions)
+			return nn->nfsd4_minorversions[minorversion];
+		return nfsd_vers(nn, 4, NFSD_TEST);
 	case NFSD_AVAIL:
-		return minorversion <= NFSD_SUPPORTED_MINOR_VERSION;
+		return minorversion <= NFSD_SUPPORTED_MINOR_VERSION &&
+			nfsd_vers(nn, 4, NFSD_AVAIL);
 	}
 	return 0;
 }
@@ -205,7 +283,7 @@ int nfsd_nrthreads(struct net *net)
 	return rv;
 }
 
-static int nfsd_init_socks(struct net *net)
+static int nfsd_init_socks(struct net *net, const struct cred *cred)
 {
 	int error;
 	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
@@ -214,12 +292,12 @@ static int nfsd_init_socks(struct net *net)
 		return 0;
 
 	error = svc_create_xprt(nn->nfsd_serv, "udp", net, PF_INET, NFS_PORT,
-					SVC_SOCK_DEFAULTS);
+					SVC_SOCK_DEFAULTS, cred);
 	if (error < 0)
 		return error;
 
 	error = svc_create_xprt(nn->nfsd_serv, "tcp", net, PF_INET, NFS_PORT,
-					SVC_SOCK_DEFAULTS);
+					SVC_SOCK_DEFAULTS, cred);
 	if (error < 0)
 		return error;
 
@@ -265,16 +343,12 @@ static void nfsd_shutdown_generic(void)
 	nfsd_racache_shutdown();
 }
 
-static bool nfsd_needs_lockd(void)
+static bool nfsd_needs_lockd(struct nfsd_net *nn)
 {
-#if defined(CONFIG_NFSD_V3)
-	return (nfsd_versions[2] != NULL) || (nfsd_versions[3] != NULL);
-#else
-	return (nfsd_versions[2] != NULL);
-#endif
+	return nfsd_vers(nn, 2, NFSD_TEST) || nfsd_vers(nn, 3, NFSD_TEST);
 }
 
-static int nfsd_startup_net(int nrservs, struct net *net)
+static int nfsd_startup_net(int nrservs, struct net *net, const struct cred *cred)
 {
 	struct nfsd_net *nn = net_generic(net, nfsd_net_id);
 	int ret;
@@ -285,12 +359,12 @@ static int nfsd_startup_net(int nrservs, struct net *net)
 	ret = nfsd_startup_generic(nrservs);
 	if (ret)
 		return ret;
-	ret = nfsd_init_socks(net);
+	ret = nfsd_init_socks(net, cred);
 	if (ret)
 		goto out_socks;
 
-	if (nfsd_needs_lockd() && !nn->lockd_up) {
-		ret = lockd_up(net);
+	if (nfsd_needs_lockd(nn) && !nn->lockd_up) {
+		ret = lockd_up(net, cred);
 		if (ret)
 			goto out_socks;
 		nn->lockd_up = 1;
@@ -422,20 +496,20 @@ static void nfsd_last_thread(struct svc_serv *serv, struct net *net)
 	nfsd_export_flush(net);
 }
 
-void nfsd_reset_versions(void)
+void nfsd_reset_versions(struct nfsd_net *nn)
 {
 	int i;
 
 	for (i = 0; i < NFSD_NRVERS; i++)
-		if (nfsd_vers(i, NFSD_TEST))
+		if (nfsd_vers(nn, i, NFSD_TEST))
 			return;
 
 	for (i = 0; i < NFSD_NRVERS; i++)
 		if (i != 4)
-			nfsd_vers(i, NFSD_SET);
+			nfsd_vers(nn, i, NFSD_SET);
 		else {
 			int minor = 0;
-			while (nfsd_minorversion(minor, NFSD_SET) >= 0)
+			while (nfsd_minorversion(nn, minor, NFSD_SET) >= 0)
 				minor++;
 		}
 }
@@ -503,7 +577,7 @@ int nfsd_create_serv(struct net *net)
 	}
 	if (nfsd_max_blksize == 0)
 		nfsd_max_blksize = nfsd_get_default_max_blksize();
-	nfsd_reset_versions();
+	nfsd_reset_versions(nn);
 	nn->nfsd_serv = svc_create_pooled(&nfsd_program, nfsd_max_blksize,
 						&nfsd_thread_sv_ops);
 	if (nn->nfsd_serv == NULL)
@@ -623,7 +697,7 @@ int nfsd_set_nrthreads(int n, int *nthreads, struct net *net)
  * this is the first time nrservs is nonzero.
  */
 int
-nfsd_svc(int nrservs, struct net *net)
+nfsd_svc(int nrservs, struct net *net, const struct cred *cred)
 {
 	int	error;
 	bool	nfsd_up_before;
@@ -645,7 +719,7 @@ nfsd_svc(int nrservs, struct net *net)
 
 	nfsd_up_before = nn->nfsd_net_up;
 
-	error = nfsd_startup_net(nrservs, net);
+	error = nfsd_startup_net(nrservs, net, cred);
 	if (error)
 		goto out_destroy;
 	error = nn->nfsd_serv->sv_ops->svo_setup(nn->nfsd_serv,
@@ -667,6 +741,101 @@ out:
 	return error;
 }
 
+#if defined(CONFIG_NFSD_V2_ACL) || defined(CONFIG_NFSD_V3_ACL)
+static bool
+nfsd_support_acl_version(int vers)
+{
+	if (vers >= NFSD_ACL_MINVERS && vers < NFSD_ACL_NRVERS)
+		return nfsd_acl_version[vers] != NULL;
+	return false;
+}
+
+static int
+nfsd_acl_rpcbind_set(struct net *net, const struct svc_program *progp,
+		     u32 version, int family, unsigned short proto,
+		     unsigned short port)
+{
+	if (!nfsd_support_acl_version(version) ||
+	    !nfsd_vers(net_generic(net, nfsd_net_id), version, NFSD_TEST))
+		return 0;
+	return svc_generic_rpcbind_set(net, progp, version, family,
+			proto, port);
+}
+
+static __be32
+nfsd_acl_init_request(struct svc_rqst *rqstp,
+		      const struct svc_program *progp,
+		      struct svc_process_info *ret)
+{
+	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+	int i;
+
+	if (likely(nfsd_support_acl_version(rqstp->rq_vers) &&
+	    nfsd_vers(nn, rqstp->rq_vers, NFSD_TEST)))
+		return svc_generic_init_request(rqstp, progp, ret);
+
+	ret->mismatch.lovers = NFSD_ACL_NRVERS;
+	for (i = NFSD_ACL_MINVERS; i < NFSD_ACL_NRVERS; i++) {
+		if (nfsd_support_acl_version(rqstp->rq_vers) &&
+		    nfsd_vers(nn, i, NFSD_TEST)) {
+			ret->mismatch.lovers = i;
+			break;
+		}
+	}
+	if (ret->mismatch.lovers == NFSD_ACL_NRVERS)
+		return rpc_prog_unavail;
+	ret->mismatch.hivers = NFSD_ACL_MINVERS;
+	for (i = NFSD_ACL_NRVERS - 1; i >= NFSD_ACL_MINVERS; i--) {
+		if (nfsd_support_acl_version(rqstp->rq_vers) &&
+		    nfsd_vers(nn, i, NFSD_TEST)) {
+			ret->mismatch.hivers = i;
+			break;
+		}
+	}
+	return rpc_prog_mismatch;
+}
+#endif
+
+static int
+nfsd_rpcbind_set(struct net *net, const struct svc_program *progp,
+		 u32 version, int family, unsigned short proto,
+		 unsigned short port)
+{
+	if (!nfsd_vers(net_generic(net, nfsd_net_id), version, NFSD_TEST))
+		return 0;
+	return svc_generic_rpcbind_set(net, progp, version, family,
+			proto, port);
+}
+
+static __be32
+nfsd_init_request(struct svc_rqst *rqstp,
+		  const struct svc_program *progp,
+		  struct svc_process_info *ret)
+{
+	struct nfsd_net *nn = net_generic(SVC_NET(rqstp), nfsd_net_id);
+	int i;
+
+	if (likely(nfsd_vers(nn, rqstp->rq_vers, NFSD_TEST)))
+		return svc_generic_init_request(rqstp, progp, ret);
+
+	ret->mismatch.lovers = NFSD_NRVERS;
+	for (i = NFSD_MINVERS; i < NFSD_NRVERS; i++) {
+		if (nfsd_vers(nn, i, NFSD_TEST)) {
+			ret->mismatch.lovers = i;
+			break;
+		}
+	}
+	if (ret->mismatch.lovers == NFSD_NRVERS)
+		return rpc_prog_unavail;
+	ret->mismatch.hivers = NFSD_MINVERS;
+	for (i = NFSD_NRVERS - 1; i >= NFSD_MINVERS; i--) {
+		if (nfsd_vers(nn, i, NFSD_TEST)) {
+			ret->mismatch.hivers = i;
+			break;
+		}
+	}
+	return rpc_prog_mismatch;
+}
 
 /*
  * This is the NFS server kernel thread
diff --git a/fs/nfsd/nfsxdr.c b/fs/nfsd/nfsxdr.c
index 6b2e8b73d36e..b51fe515f06f 100644
--- a/fs/nfsd/nfsxdr.c
+++ b/fs/nfsd/nfsxdr.c
@@ -71,7 +71,7 @@ decode_filename(__be32 *p, char **namp, unsigned int *lenp)
 }
 
 static __be32 *
-decode_sattr(__be32 *p, struct iattr *iap)
+decode_sattr(__be32 *p, struct iattr *iap, struct user_namespace *userns)
 {
 	u32	tmp, tmp1;
 
@@ -86,12 +86,12 @@ decode_sattr(__be32 *p, struct iattr *iap)
 		iap->ia_mode = tmp;
 	}
 	if ((tmp = ntohl(*p++)) != (u32)-1) {
-		iap->ia_uid = make_kuid(&init_user_ns, tmp);
+		iap->ia_uid = make_kuid(userns, tmp);
 		if (uid_valid(iap->ia_uid))
 			iap->ia_valid |= ATTR_UID;
 	}
 	if ((tmp = ntohl(*p++)) != (u32)-1) {
-		iap->ia_gid = make_kgid(&init_user_ns, tmp);
+		iap->ia_gid = make_kgid(userns, tmp);
 		if (gid_valid(iap->ia_gid))
 			iap->ia_valid |= ATTR_GID;
 	}
@@ -129,6 +129,7 @@ static __be32 *
 encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
 	     struct kstat *stat)
 {
+	struct user_namespace *userns = nfsd_user_namespace(rqstp);
 	struct dentry	*dentry = fhp->fh_dentry;
 	int type;
 	struct timespec64 time;
@@ -139,8 +140,8 @@ encode_fattr(struct svc_rqst *rqstp, __be32 *p, struct svc_fh *fhp,
 	*p++ = htonl(nfs_ftypes[type >> 12]);
 	*p++ = htonl((u32) stat->mode);
 	*p++ = htonl((u32) stat->nlink);
-	*p++ = htonl((u32) from_kuid(&init_user_ns, stat->uid));
-	*p++ = htonl((u32) from_kgid(&init_user_ns, stat->gid));
+	*p++ = htonl((u32) from_kuid_munged(userns, stat->uid));
+	*p++ = htonl((u32) from_kgid_munged(userns, stat->gid));
 
 	if (S_ISLNK(type) && stat->size > NFS_MAXPATHLEN) {
 		*p++ = htonl(NFS_MAXPATHLEN);
@@ -216,7 +217,7 @@ nfssvc_decode_sattrargs(struct svc_rqst *rqstp, __be32 *p)
 	p = decode_fh(p, &args->fh);
 	if (!p)
 		return 0;
-	p = decode_sattr(p, &args->attrs);
+	p = decode_sattr(p, &args->attrs, nfsd_user_namespace(rqstp));
 
 	return xdr_argsize_check(rqstp, p);
 }
@@ -319,7 +320,7 @@ nfssvc_decode_createargs(struct svc_rqst *rqstp, __be32 *p)
 	if (   !(p = decode_fh(p, &args->fh))
 	    || !(p = decode_filename(p, &args->name, &args->len)))
 		return 0;
-	p = decode_sattr(p, &args->attrs);
+	p = decode_sattr(p, &args->attrs, nfsd_user_namespace(rqstp));
 
 	return xdr_argsize_check(rqstp, p);
 }
@@ -398,7 +399,7 @@ nfssvc_decode_symlinkargs(struct svc_rqst *rqstp, __be32 *p)
 			return 0;
 		p += xdrlen;
 	}
-	decode_sattr(p, &args->attrs);
+	decode_sattr(p, &args->attrs, nfsd_user_namespace(rqstp));
 
 	return 1;
 }
diff --git a/fs/nfsd/state.h b/fs/nfsd/state.h
index 396c76755b03..5dbd16946e8e 100644
--- a/fs/nfsd/state.h
+++ b/fs/nfsd/state.h
@@ -39,6 +39,7 @@
 #include <linux/refcount.h>
 #include <linux/sunrpc/svc_xprt.h>
 #include "nfsfh.h"
+#include "nfsd.h"
 
 typedef struct {
 	u32             cl_boot;
@@ -70,6 +71,7 @@ struct nfsd4_callback {
 	int cb_seq_status;
 	int cb_status;
 	bool cb_need_restart;
+	bool cb_holds_slot;
 };
 
 struct nfsd4_callback_ops {
@@ -315,6 +317,10 @@ struct nfs4_client {
 	clientid_t		cl_clientid;	/* generated by server */
 	nfs4_verifier		cl_confirm;	/* generated by server */
 	u32			cl_minorversion;
+	/* NFSv4.1 client implementation id: */
+	struct xdr_netobj	cl_nii_domain;
+	struct xdr_netobj	cl_nii_name;
+	struct timespec		cl_nii_time;
 
 	/* for v4.0 and v4.1 callbacks: */
 	struct nfs4_cb_conn	cl_cb_conn;
@@ -346,9 +352,13 @@ struct nfs4_client {
 	struct nfsd4_clid_slot	cl_cs_slot;	/* create_session slot */
 	u32			cl_exchange_flags;
 	/* number of rpc's in progress over an associated session: */
-	atomic_t		cl_refcount;
+	atomic_t		cl_rpc_users;
+	struct nfsdfs_client	cl_nfsdfs;
 	struct nfs4_op_map      cl_spo_must_allow;
 
+	/* debugging info directory under nfsd/clients/ : */
+	struct dentry		*cl_nfsd_dentry;
+
 	/* for nfs41 callbacks */
 	/* We currently support a single back channel with a single slot */
 	unsigned long		cl_cb_slot_busy;
@@ -367,7 +377,7 @@ struct nfs4_client {
 struct nfs4_client_reclaim {
 	struct list_head	cr_strhash;	/* hash by cr_name */
 	struct nfs4_client	*cr_clp;	/* pointer to associated clp */
-	char			cr_recdir[HEXDIR_LEN]; /* recover dir */
+	struct xdr_netobj	cr_name;	/* recovery dir name */
 };
 
 /* A reasonable value for REPLAY_ISIZE was estimated as follows:  
@@ -619,7 +629,7 @@ void nfs4_put_stid(struct nfs4_stid *s);
 void nfs4_inc_and_copy_stateid(stateid_t *dst, struct nfs4_stid *stid);
 void nfs4_remove_reclaim_record(struct nfs4_client_reclaim *, struct nfsd_net *);
 extern void nfs4_release_reclaim(struct nfsd_net *);
-extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(const char *recdir,
+extern struct nfs4_client_reclaim *nfsd4_find_reclaim_client(struct xdr_netobj name,
 							struct nfsd_net *nn);
 extern __be32 nfs4_check_open_reclaim(clientid_t *clid,
 		struct nfsd4_compound_state *cstate, struct nfsd_net *nn);
@@ -634,9 +644,9 @@ extern void nfsd4_destroy_callback_queue(void);
 extern void nfsd4_shutdown_callback(struct nfs4_client *);
 extern void nfsd4_shutdown_copy(struct nfs4_client *clp);
 extern void nfsd4_prepare_cb_recall(struct nfs4_delegation *dp);
-extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(const char *name,
+extern struct nfs4_client_reclaim *nfs4_client_to_reclaim(struct xdr_netobj name,
 							struct nfsd_net *nn);
-extern bool nfs4_has_reclaimed_state(const char *name, struct nfsd_net *nn);
+extern bool nfs4_has_reclaimed_state(struct xdr_netobj name, struct nfsd_net *nn);
 
 struct nfs4_file *find_file(struct knfsd_fh *fh);
 void put_nfs4_file(struct nfs4_file *fi);
@@ -662,7 +672,7 @@ extern void nfsd4_record_grace_done(struct nfsd_net *nn);
 
 /* nfs fault injection functions */
 #ifdef CONFIG_NFSD_FAULT_INJECTION
-int nfsd_fault_inject_init(void);
+void nfsd_fault_inject_init(void);
 void nfsd_fault_inject_cleanup(void);
 
 u64 nfsd_inject_print_clients(void);
@@ -683,7 +693,7 @@ u64 nfsd_inject_forget_delegations(u64);
 u64 nfsd_inject_recall_client_delegations(struct sockaddr_storage *, size_t);
 u64 nfsd_inject_recall_delegations(u64);
 #else /* CONFIG_NFSD_FAULT_INJECTION */
-static inline int nfsd_fault_inject_init(void) { return 0; }
+static inline void nfsd_fault_inject_init(void) {}
 static inline void nfsd_fault_inject_cleanup(void) {}
 #endif /* CONFIG_NFSD_FAULT_INJECTION */
 
diff --git a/fs/nfsd/vfs.c b/fs/nfsd/vfs.c
index 7dc98e14655d..c85783e536d5 100644
--- a/fs/nfsd/vfs.c
+++ b/fs/nfsd/vfs.c
@@ -404,7 +404,7 @@ nfsd_setattr(struct svc_rqst *rqstp, struct svc_fh *fhp, struct iattr *iap,
 	/*
 	 * If utimes(2) and friends are called with times not NULL, we should
 	 * not set NFSD_MAY_WRITE bit. Otherwise fh_verify->nfsd_permission
-	 * will return EACCESS, when the caller's effective UID does not match
+	 * will return EACCES, when the caller's effective UID does not match
 	 * the owner of the file, and the caller is not privileged. In this
 	 * situation, we should return EPERM(notify_change will return this).
 	 */
@@ -1786,12 +1786,12 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
 	rdentry = lookup_one_len(fname, dentry, flen);
 	host_err = PTR_ERR(rdentry);
 	if (IS_ERR(rdentry))
-		goto out_nfserr;
+		goto out_drop_write;
 
 	if (d_really_is_negative(rdentry)) {
 		dput(rdentry);
-		err = nfserr_noent;
-		goto out;
+		host_err = -ENOENT;
+		goto out_drop_write;
 	}
 
 	if (!type)
@@ -1805,6 +1805,8 @@ nfsd_unlink(struct svc_rqst *rqstp, struct svc_fh *fhp, int type,
 		host_err = commit_metadata(fhp);
 	dput(rdentry);
 
+out_drop_write:
+	fh_drop_write(fhp);
 out_nfserr:
 	err = nfserrno(host_err);
 out:
diff --git a/fs/nfsd/vfs.h b/fs/nfsd/vfs.h
index a7e107309f76..db351247892d 100644
--- a/fs/nfsd/vfs.h
+++ b/fs/nfsd/vfs.h
@@ -120,8 +120,11 @@ void		nfsd_put_raparams(struct file *file, struct raparms *ra);
 
 static inline int fh_want_write(struct svc_fh *fh)
 {
-	int ret = mnt_want_write(fh->fh_export->ex_path.mnt);
+	int ret;
 
+	if (fh->fh_want_write)
+		return 0;
+	ret = mnt_want_write(fh->fh_export->ex_path.mnt);
 	if (!ret)
 		fh->fh_want_write = true;
 	return ret;
diff --git a/fs/nfsd/xdr4.h b/fs/nfsd/xdr4.h
index feeb6d4bdffd..d64c870f998a 100644
--- a/fs/nfsd/xdr4.h
+++ b/fs/nfsd/xdr4.h
@@ -410,6 +410,9 @@ struct nfsd4_exchange_id {
 	int		spa_how;
 	u32             spo_must_enforce[3];
 	u32             spo_must_allow[3];
+	struct xdr_netobj nii_domain;
+	struct xdr_netobj nii_name;
+	struct timespec64 nii_time;
 };
 
 struct nfsd4_sequence {
@@ -472,7 +475,7 @@ struct nfsd4_layoutcommit {
 	u32			lc_reclaim;	/* request */
 	u32			lc_newoffset;	/* request */
 	u64			lc_last_wr;	/* request */
-	struct timespec		lc_mtime;	/* request */
+	struct timespec64	lc_mtime;	/* request */
 	u32			lc_layout_type;	/* request */
 	u32			lc_up_len;	/* layout length */
 	void			*lc_up_layout;	/* decoded by callback */
diff --git a/fs/nilfs2/Kconfig b/fs/nilfs2/Kconfig
index 80da8eb27393..254d102e79c9 100644
--- a/fs/nilfs2/Kconfig
+++ b/fs/nilfs2/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config NILFS2_FS
 	tristate "NILFS2 file system support"
 	select CRC32
diff --git a/fs/nilfs2/btnode.c b/fs/nilfs2/btnode.c
index f2129a5d9f23..4391fd3abd8f 100644
--- a/fs/nilfs2/btnode.c
+++ b/fs/nilfs2/btnode.c
@@ -189,7 +189,7 @@ retry:
 		 */
 		if (!err)
 			return 0;
-		else if (err != -EEXIST)
+		else if (err != -EBUSY)
 			goto failed_unlock;
 
 		err = invalidate_inode_pages2_range(btnc, newkey, newkey);
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index 9b96d79eea6c..91b9dac6b2cc 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -148,13 +148,8 @@ static int nilfs_ioctl_setflags(struct inode *inode, struct file *filp,
 
 	oldflags = NILFS_I(inode)->i_flags;
 
-	/*
-	 * The IMMUTABLE and APPEND_ONLY flags can only be changed by the
-	 * relevant capability.
-	 */
-	ret = -EPERM;
-	if (((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) &&
-	    !capable(CAP_LINUX_IMMUTABLE))
+	ret = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+	if (ret)
 		goto out;
 
 	ret = nilfs_transaction_begin(inode->i_sb, &ti, 0);
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index a2f247b6a209..42395ba52da6 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -252,7 +252,6 @@ int nilfs_ioctl_prepare_clean_segments(struct the_nilfs *, struct nilfs_argv *,
 void nilfs_inode_add_blocks(struct inode *inode, int n);
 void nilfs_inode_sub_blocks(struct inode *inode, int n);
 extern struct inode *nilfs_new_inode(struct inode *, umode_t);
-extern void nilfs_free_inode(struct inode *);
 extern int nilfs_get_block(struct inode *, sector_t, struct buffer_head *, int);
 extern void nilfs_set_inode_flags(struct inode *);
 extern int nilfs_read_inode_common(struct inode *, struct nilfs_inode *);
@@ -289,7 +288,6 @@ static inline int nilfs_mark_inode_dirty_sync(struct inode *inode)
 
 /* super.c */
 extern struct inode *nilfs_alloc_inode(struct super_block *);
-extern void nilfs_destroy_inode(struct inode *);
 
 extern __printf(3, 4)
 void __nilfs_msg(struct super_block *sb, const char *level,
diff --git a/fs/nilfs2/super.c b/fs/nilfs2/super.c
index 26290aa1023f..5729ee86da9a 100644
--- a/fs/nilfs2/super.c
+++ b/fs/nilfs2/super.c
@@ -155,21 +155,14 @@ struct inode *nilfs_alloc_inode(struct super_block *sb)
 	return &ii->vfs_inode;
 }
 
-static void nilfs_i_callback(struct rcu_head *head)
+static void nilfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-
 	if (nilfs_is_metadata_file_inode(inode))
 		nilfs_mdt_destroy(inode);
 
 	kmem_cache_free(nilfs_inode_cachep, NILFS_I(inode));
 }
 
-void nilfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, nilfs_i_callback);
-}
-
 static int nilfs_sync_super(struct super_block *sb, int flag)
 {
 	struct the_nilfs *nilfs = sb->s_fs_info;
@@ -686,7 +679,7 @@ static int nilfs_show_options(struct seq_file *seq, struct dentry *dentry)
 
 static const struct super_operations nilfs_sops = {
 	.alloc_inode    = nilfs_alloc_inode,
-	.destroy_inode  = nilfs_destroy_inode,
+	.free_inode     = nilfs_free_inode,
 	.dirty_inode    = nilfs_dirty_inode,
 	.evict_inode    = nilfs_evict_inode,
 	.put_super      = nilfs_put_super,
diff --git a/fs/nls/Kconfig b/fs/nls/Kconfig
index e2ce79ef48c4..5a63303298e6 100644
--- a/fs/nls/Kconfig
+++ b/fs/nls/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Native language support configuration
 #
diff --git a/fs/no-block.c b/fs/no-block.c
index 6e40e42a43de..481c0f0ab4bd 100644
--- a/fs/no-block.c
+++ b/fs/no-block.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* no-block.c: implementation of routines required for non-BLOCK configuration
  *
  * Copyright (C) 2006 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/kernel.h>
diff --git a/fs/notify/Kconfig b/fs/notify/Kconfig
index 2a24249b30af..c020d26ba223 100644
--- a/fs/notify/Kconfig
+++ b/fs/notify/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config FSNOTIFY
 	def_bool n
 	select SRCU
diff --git a/fs/notify/dnotify/Kconfig b/fs/notify/dnotify/Kconfig
index f9c1ca139d8f..3df7def17eea 100644
--- a/fs/notify/dnotify/Kconfig
+++ b/fs/notify/dnotify/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config DNOTIFY
 	bool "Dnotify support"
 	select FSNOTIFY
diff --git a/fs/notify/dnotify/Makefile b/fs/notify/dnotify/Makefile
index f145251dcadb..121b4dd6b1fe 100644
--- a/fs/notify/dnotify/Makefile
+++ b/fs/notify/dnotify/Makefile
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_DNOTIFY)		+= dnotify.o
diff --git a/fs/notify/dnotify/dnotify.c b/fs/notify/dnotify/dnotify.c
index 58d77dc696eb..c03758c91481 100644
--- a/fs/notify/dnotify/dnotify.c
+++ b/fs/notify/dnotify/dnotify.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Directory notifications for Linux.
  *
@@ -5,16 +6,6 @@
  *
  * Copyright (C) 2009 Eric Paris <Red Hat Inc>
  * dnotify was largly rewritten to use the new fsnotify infrastructure
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 #include <linux/fs.h>
 #include <linux/module.h>
@@ -81,7 +72,7 @@ static void dnotify_recalc_inode_mask(struct fsnotify_mark *fsn_mark)
 static int dnotify_handle_event(struct fsnotify_group *group,
 				struct inode *inode,
 				u32 mask, const void *data, int data_type,
-				const unsigned char *file_name, u32 cookie,
+				const struct qstr *file_name, u32 cookie,
 				struct fsnotify_iter_info *iter_info)
 {
 	struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info);
diff --git a/fs/notify/fanotify/Kconfig b/fs/notify/fanotify/Kconfig
index 41355ce74ac0..8b9103f126ad 100644
--- a/fs/notify/fanotify/Kconfig
+++ b/fs/notify/fanotify/Kconfig
@@ -1,7 +1,8 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config FANOTIFY
 	bool "Filesystem wide access notification"
 	select FSNOTIFY
-	select ANON_INODES
+	select EXPORTFS
 	default n
 	---help---
 	   Say Y here to enable fanotify support.  fanotify is a file access
diff --git a/fs/notify/fanotify/Makefile b/fs/notify/fanotify/Makefile
index 0999213e7e6e..25ef222915e5 100644
--- a/fs/notify/fanotify/Makefile
+++ b/fs/notify/fanotify/Makefile
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_FANOTIFY)		+= fanotify.o fanotify_user.o
diff --git a/fs/notify/fanotify/fanotify.c b/fs/notify/fanotify/fanotify.c
index 3723f3d18d20..5778d1347b35 100644
--- a/fs/notify/fanotify/fanotify.c
+++ b/fs/notify/fanotify/fanotify.c
@@ -13,22 +13,40 @@
 #include <linux/wait.h>
 #include <linux/audit.h>
 #include <linux/sched/mm.h>
+#include <linux/statfs.h>
 
 #include "fanotify.h"
 
 static bool should_merge(struct fsnotify_event *old_fsn,
 			 struct fsnotify_event *new_fsn)
 {
-	struct fanotify_event_info *old, *new;
+	struct fanotify_event *old, *new;
 
 	pr_debug("%s: old=%p new=%p\n", __func__, old_fsn, new_fsn);
 	old = FANOTIFY_E(old_fsn);
 	new = FANOTIFY_E(new_fsn);
 
-	if (old_fsn->inode == new_fsn->inode && old->pid == new->pid &&
-	    old->path.mnt == new->path.mnt &&
-	    old->path.dentry == new->path.dentry)
-		return true;
+	if (old_fsn->inode != new_fsn->inode || old->pid != new->pid ||
+	    old->fh_type != new->fh_type || old->fh_len != new->fh_len)
+		return false;
+
+	if (fanotify_event_has_path(old)) {
+		return old->path.mnt == new->path.mnt &&
+			old->path.dentry == new->path.dentry;
+	} else if (fanotify_event_has_fid(old)) {
+		/*
+		 * We want to merge many dirent events in the same dir (i.e.
+		 * creates/unlinks/renames), but we do not want to merge dirent
+		 * events referring to subdirs with dirent events referring to
+		 * non subdirs, otherwise, user won't be able to tell from a
+		 * mask FAN_CREATE|FAN_DELETE|FAN_ONDIR if it describes mkdir+
+		 * unlink pair or rmdir+create pair of events.
+		 */
+		return (old->mask & FS_ISDIR) == (new->mask & FS_ISDIR) &&
+			fanotify_fid_equal(&old->fid, &new->fid, old->fh_len);
+	}
+
+	/* Do not merge events if we failed to encode fid */
 	return false;
 }
 
@@ -36,20 +54,22 @@ static bool should_merge(struct fsnotify_event *old_fsn,
 static int fanotify_merge(struct list_head *list, struct fsnotify_event *event)
 {
 	struct fsnotify_event *test_event;
+	struct fanotify_event *new;
 
 	pr_debug("%s: list=%p event=%p\n", __func__, list, event);
+	new = FANOTIFY_E(event);
 
 	/*
 	 * Don't merge a permission event with any other event so that we know
 	 * the event structure we have created in fanotify_handle_event() is the
 	 * one we should check for permission response.
 	 */
-	if (fanotify_is_perm_event(event->mask))
+	if (fanotify_is_perm_event(new->mask))
 		return 0;
 
 	list_for_each_entry_reverse(test_event, list, list) {
 		if (should_merge(test_event, event)) {
-			test_event->mask |= event->mask;
+			FANOTIFY_E(test_event)->mask |= new->mask;
 			return 1;
 		}
 	}
@@ -57,15 +77,44 @@ static int fanotify_merge(struct list_head *list, struct fsnotify_event *event)
 	return 0;
 }
 
+/*
+ * Wait for response to permission event. The function also takes care of
+ * freeing the permission event (or offloads that in case the wait is canceled
+ * by a signal). The function returns 0 in case access got allowed by userspace,
+ * -EPERM in case userspace disallowed the access, and -ERESTARTSYS in case
+ * the wait got interrupted by a signal.
+ */
 static int fanotify_get_response(struct fsnotify_group *group,
-				 struct fanotify_perm_event_info *event,
+				 struct fanotify_perm_event *event,
 				 struct fsnotify_iter_info *iter_info)
 {
 	int ret;
 
 	pr_debug("%s: group=%p event=%p\n", __func__, group, event);
 
-	wait_event(group->fanotify_data.access_waitq, event->response);
+	ret = wait_event_killable(group->fanotify_data.access_waitq,
+				  event->state == FAN_EVENT_ANSWERED);
+	/* Signal pending? */
+	if (ret < 0) {
+		spin_lock(&group->notification_lock);
+		/* Event reported to userspace and no answer yet? */
+		if (event->state == FAN_EVENT_REPORTED) {
+			/* Event will get freed once userspace answers to it */
+			event->state = FAN_EVENT_CANCELED;
+			spin_unlock(&group->notification_lock);
+			return ret;
+		}
+		/* Event not yet reported? Just remove it. */
+		if (event->state == FAN_EVENT_INIT)
+			fsnotify_remove_queued_event(group, &event->fae.fse);
+		/*
+		 * Event may be also answered in case signal delivery raced
+		 * with wakeup. In that case we have nothing to do besides
+		 * freeing the event and reporting error.
+		 */
+		spin_unlock(&group->notification_lock);
+		goto out;
+	}
 
 	/* userspace responded, convert to something usable */
 	switch (event->response & ~FAN_AUDIT) {
@@ -81,11 +130,11 @@ static int fanotify_get_response(struct fsnotify_group *group,
 	if (event->response & FAN_AUDIT)
 		audit_fanotify(event->response & ~FAN_AUDIT);
 
-	event->response = 0;
-
 	pr_debug("%s: group=%p event=%p about to return ret=%d\n", __func__,
 		 group, event, ret);
-	
+out:
+	fsnotify_destroy_event(group, &event->fae.fse);
+
 	return ret;
 }
 
@@ -95,11 +144,13 @@ static int fanotify_get_response(struct fsnotify_group *group,
  * been included within the event mask, but have not been explicitly
  * requested by the user, will not be present in the returned mask.
  */
-static u32 fanotify_group_event_mask(struct fsnotify_iter_info *iter_info,
-				       u32 event_mask, const void *data,
-				       int data_type)
+static u32 fanotify_group_event_mask(struct fsnotify_group *group,
+				     struct fsnotify_iter_info *iter_info,
+				     u32 event_mask, const void *data,
+				     int data_type)
 {
 	__u32 marks_mask = 0, marks_ignored_mask = 0;
+	__u32 test_mask, user_mask = FANOTIFY_OUTGOING_EVENTS;
 	const struct path *path = data;
 	struct fsnotify_mark *mark;
 	int type;
@@ -107,14 +158,14 @@ static u32 fanotify_group_event_mask(struct fsnotify_iter_info *iter_info,
 	pr_debug("%s: report_mask=%x mask=%x data=%p data_type=%d\n",
 		 __func__, iter_info->report_mask, event_mask, data, data_type);
 
-	/* If we don't have enough info to send an event to userspace say no */
-	if (data_type != FSNOTIFY_EVENT_PATH)
-		return 0;
-
-	/* Sorry, fanotify only gives a damn about files and dirs */
-	if (!d_is_reg(path->dentry) &&
-	    !d_can_lookup(path->dentry))
-		return 0;
+	if (!FAN_GROUP_FLAG(group, FAN_REPORT_FID)) {
+		/* Do we have path to open a file descriptor? */
+		if (data_type != FSNOTIFY_EVENT_PATH)
+			return 0;
+		/* Path type events are only relevant for files and dirs */
+		if (!d_is_reg(path->dentry) && !d_can_lookup(path->dentry))
+			return 0;
+	}
 
 	fsnotify_foreach_obj_type(type) {
 		if (!fsnotify_iter_should_report_type(iter_info, type))
@@ -133,55 +184,152 @@ static u32 fanotify_group_event_mask(struct fsnotify_iter_info *iter_info,
 		marks_ignored_mask |= mark->ignored_mask;
 	}
 
-	if (d_is_dir(path->dentry) &&
+	test_mask = event_mask & marks_mask & ~marks_ignored_mask;
+
+	/*
+	 * dirent modification events (create/delete/move) do not carry the
+	 * child entry name/inode information. Instead, we report FAN_ONDIR
+	 * for mkdir/rmdir so user can differentiate them from creat/unlink.
+	 *
+	 * For backward compatibility and consistency, do not report FAN_ONDIR
+	 * to user in legacy fanotify mode (reporting fd) and report FAN_ONDIR
+	 * to user in FAN_REPORT_FID mode for all event types.
+	 */
+	if (FAN_GROUP_FLAG(group, FAN_REPORT_FID)) {
+		/* Do not report FAN_ONDIR without any event */
+		if (!(test_mask & ~FAN_ONDIR))
+			return 0;
+	} else {
+		user_mask &= ~FAN_ONDIR;
+	}
+
+	if (event_mask & FS_ISDIR &&
 	    !(marks_mask & FS_ISDIR & ~marks_ignored_mask))
 		return 0;
 
-	return event_mask & FANOTIFY_OUTGOING_EVENTS & marks_mask &
-		~marks_ignored_mask;
+	return test_mask & user_mask;
+}
+
+static int fanotify_encode_fid(struct fanotify_event *event,
+			       struct inode *inode, gfp_t gfp,
+			       __kernel_fsid_t *fsid)
+{
+	struct fanotify_fid *fid = &event->fid;
+	int dwords, bytes = 0;
+	int err, type;
+
+	fid->ext_fh = NULL;
+	dwords = 0;
+	err = -ENOENT;
+	type = exportfs_encode_inode_fh(inode, NULL, &dwords, NULL);
+	if (!dwords)
+		goto out_err;
+
+	bytes = dwords << 2;
+	if (bytes > FANOTIFY_INLINE_FH_LEN) {
+		/* Treat failure to allocate fh as failure to allocate event */
+		err = -ENOMEM;
+		fid->ext_fh = kmalloc(bytes, gfp);
+		if (!fid->ext_fh)
+			goto out_err;
+	}
+
+	type = exportfs_encode_inode_fh(inode, fanotify_fid_fh(fid, bytes),
+					&dwords, NULL);
+	err = -EINVAL;
+	if (!type || type == FILEID_INVALID || bytes != dwords << 2)
+		goto out_err;
+
+	fid->fsid = *fsid;
+	event->fh_len = bytes;
+
+	return type;
+
+out_err:
+	pr_warn_ratelimited("fanotify: failed to encode fid (fsid=%x.%x, "
+			    "type=%d, bytes=%d, err=%i)\n",
+			    fsid->val[0], fsid->val[1], type, bytes, err);
+	kfree(fid->ext_fh);
+	fid->ext_fh = NULL;
+	event->fh_len = 0;
+
+	return FILEID_INVALID;
+}
+
+/*
+ * The inode to use as identifier when reporting fid depends on the event.
+ * Report the modified directory inode on dirent modification events.
+ * Report the "victim" inode otherwise.
+ * For example:
+ * FS_ATTRIB reports the child inode even if reported on a watched parent.
+ * FS_CREATE reports the modified dir inode and not the created inode.
+ */
+static struct inode *fanotify_fid_inode(struct inode *to_tell, u32 event_mask,
+					const void *data, int data_type)
+{
+	if (event_mask & ALL_FSNOTIFY_DIRENT_EVENTS)
+		return to_tell;
+	else if (data_type == FSNOTIFY_EVENT_INODE)
+		return (struct inode *)data;
+	else if (data_type == FSNOTIFY_EVENT_PATH)
+		return d_inode(((struct path *)data)->dentry);
+	return NULL;
 }
 
-struct fanotify_event_info *fanotify_alloc_event(struct fsnotify_group *group,
-						 struct inode *inode, u32 mask,
-						 const struct path *path)
+struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group,
+					    struct inode *inode, u32 mask,
+					    const void *data, int data_type,
+					    __kernel_fsid_t *fsid)
 {
-	struct fanotify_event_info *event = NULL;
+	struct fanotify_event *event = NULL;
 	gfp_t gfp = GFP_KERNEL_ACCOUNT;
+	struct inode *id = fanotify_fid_inode(inode, mask, data, data_type);
 
 	/*
 	 * For queues with unlimited length lost events are not expected and
 	 * can possibly have security implications. Avoid losing events when
-	 * memory is short.
+	 * memory is short. For the limited size queues, avoid OOM killer in the
+	 * target monitoring memcg as it may have security repercussion.
 	 */
 	if (group->max_events == UINT_MAX)
 		gfp |= __GFP_NOFAIL;
+	else
+		gfp |= __GFP_RETRY_MAYFAIL;
 
 	/* Whoever is interested in the event, pays for the allocation. */
 	memalloc_use_memcg(group->memcg);
 
 	if (fanotify_is_perm_event(mask)) {
-		struct fanotify_perm_event_info *pevent;
+		struct fanotify_perm_event *pevent;
 
 		pevent = kmem_cache_alloc(fanotify_perm_event_cachep, gfp);
 		if (!pevent)
 			goto out;
 		event = &pevent->fae;
 		pevent->response = 0;
+		pevent->state = FAN_EVENT_INIT;
 		goto init;
 	}
 	event = kmem_cache_alloc(fanotify_event_cachep, gfp);
 	if (!event)
 		goto out;
 init: __maybe_unused
-	fsnotify_init_event(&event->fse, inode, mask);
+	fsnotify_init_event(&event->fse, inode);
+	event->mask = mask;
 	if (FAN_GROUP_FLAG(group, FAN_REPORT_TID))
 		event->pid = get_pid(task_pid(current));
 	else
 		event->pid = get_pid(task_tgid(current));
-	if (path) {
-		event->path = *path;
+	event->fh_len = 0;
+	if (id && FAN_GROUP_FLAG(group, FAN_REPORT_FID)) {
+		/* Report the event without a file identifier on encode error */
+		event->fh_type = fanotify_encode_fid(event, id, gfp, fsid);
+	} else if (data_type == FSNOTIFY_EVENT_PATH) {
+		event->fh_type = FILEID_ROOT;
+		event->path = *((struct path *)data);
 		path_get(&event->path);
 	} else {
+		event->fh_type = FILEID_INVALID;
 		event->path.mnt = NULL;
 		event->path.dentry = NULL;
 	}
@@ -190,21 +338,62 @@ out:
 	return event;
 }
 
+/*
+ * Get cached fsid of the filesystem containing the object from any connector.
+ * All connectors are supposed to have the same fsid, but we do not verify that
+ * here.
+ */
+static __kernel_fsid_t fanotify_get_fsid(struct fsnotify_iter_info *iter_info)
+{
+	int type;
+	__kernel_fsid_t fsid = {};
+
+	fsnotify_foreach_obj_type(type) {
+		struct fsnotify_mark_connector *conn;
+
+		if (!fsnotify_iter_should_report_type(iter_info, type))
+			continue;
+
+		conn = READ_ONCE(iter_info->marks[type]->connector);
+		/* Mark is just getting destroyed or created? */
+		if (!conn)
+			continue;
+		if (!(conn->flags & FSNOTIFY_CONN_FLAG_HAS_FSID))
+			continue;
+		/* Pairs with smp_wmb() in fsnotify_add_mark_list() */
+		smp_rmb();
+		fsid = conn->fsid;
+		if (WARN_ON_ONCE(!fsid.val[0] && !fsid.val[1]))
+			continue;
+		return fsid;
+	}
+
+	return fsid;
+}
+
 static int fanotify_handle_event(struct fsnotify_group *group,
 				 struct inode *inode,
 				 u32 mask, const void *data, int data_type,
-				 const unsigned char *file_name, u32 cookie,
+				 const struct qstr *file_name, u32 cookie,
 				 struct fsnotify_iter_info *iter_info)
 {
 	int ret = 0;
-	struct fanotify_event_info *event;
+	struct fanotify_event *event;
 	struct fsnotify_event *fsn_event;
+	__kernel_fsid_t fsid = {};
 
 	BUILD_BUG_ON(FAN_ACCESS != FS_ACCESS);
 	BUILD_BUG_ON(FAN_MODIFY != FS_MODIFY);
+	BUILD_BUG_ON(FAN_ATTRIB != FS_ATTRIB);
 	BUILD_BUG_ON(FAN_CLOSE_NOWRITE != FS_CLOSE_NOWRITE);
 	BUILD_BUG_ON(FAN_CLOSE_WRITE != FS_CLOSE_WRITE);
 	BUILD_BUG_ON(FAN_OPEN != FS_OPEN);
+	BUILD_BUG_ON(FAN_MOVED_TO != FS_MOVED_TO);
+	BUILD_BUG_ON(FAN_MOVED_FROM != FS_MOVED_FROM);
+	BUILD_BUG_ON(FAN_CREATE != FS_CREATE);
+	BUILD_BUG_ON(FAN_DELETE != FS_DELETE);
+	BUILD_BUG_ON(FAN_DELETE_SELF != FS_DELETE_SELF);
+	BUILD_BUG_ON(FAN_MOVE_SELF != FS_MOVE_SELF);
 	BUILD_BUG_ON(FAN_EVENT_ON_CHILD != FS_EVENT_ON_CHILD);
 	BUILD_BUG_ON(FAN_Q_OVERFLOW != FS_Q_OVERFLOW);
 	BUILD_BUG_ON(FAN_OPEN_PERM != FS_OPEN_PERM);
@@ -213,9 +402,10 @@ static int fanotify_handle_event(struct fsnotify_group *group,
 	BUILD_BUG_ON(FAN_OPEN_EXEC != FS_OPEN_EXEC);
 	BUILD_BUG_ON(FAN_OPEN_EXEC_PERM != FS_OPEN_EXEC_PERM);
 
-	BUILD_BUG_ON(HWEIGHT32(ALL_FANOTIFY_EVENT_BITS) != 12);
+	BUILD_BUG_ON(HWEIGHT32(ALL_FANOTIFY_EVENT_BITS) != 19);
 
-	mask = fanotify_group_event_mask(iter_info, mask, data, data_type);
+	mask = fanotify_group_event_mask(group, iter_info, mask, data,
+					 data_type);
 	if (!mask)
 		return 0;
 
@@ -231,7 +421,15 @@ static int fanotify_handle_event(struct fsnotify_group *group,
 			return 0;
 	}
 
-	event = fanotify_alloc_event(group, inode, mask, data);
+	if (FAN_GROUP_FLAG(group, FAN_REPORT_FID)) {
+		fsid = fanotify_get_fsid(iter_info);
+		/* Racing with mark destruction or creation? */
+		if (!fsid.val[0] && !fsid.val[1])
+			return 0;
+	}
+
+	event = fanotify_alloc_event(group, inode, mask, data, data_type,
+				     &fsid);
 	ret = -ENOMEM;
 	if (unlikely(!event)) {
 		/*
@@ -255,7 +453,6 @@ static int fanotify_handle_event(struct fsnotify_group *group,
 	} else if (fanotify_is_perm_event(mask)) {
 		ret = fanotify_get_response(group, FANOTIFY_PE(fsn_event),
 					    iter_info);
-		fsnotify_destroy_event(group, fsn_event);
 	}
 finish:
 	if (fanotify_is_perm_event(mask))
@@ -275,12 +472,15 @@ static void fanotify_free_group_priv(struct fsnotify_group *group)
 
 static void fanotify_free_event(struct fsnotify_event *fsn_event)
 {
-	struct fanotify_event_info *event;
+	struct fanotify_event *event;
 
 	event = FANOTIFY_E(fsn_event);
-	path_put(&event->path);
+	if (fanotify_event_has_path(event))
+		path_put(&event->path);
+	else if (fanotify_event_has_ext_fh(event))
+		kfree(event->fid.ext_fh);
 	put_pid(event->pid);
-	if (fanotify_is_perm_event(fsn_event->mask)) {
+	if (fanotify_is_perm_event(event->mask)) {
 		kmem_cache_free(fanotify_perm_event_cachep,
 				FANOTIFY_PE(fsn_event));
 		return;
diff --git a/fs/notify/fanotify/fanotify.h b/fs/notify/fanotify/fanotify.h
index ea05b8a401e7..68b30504284c 100644
--- a/fs/notify/fanotify/fanotify.h
+++ b/fs/notify/fanotify/fanotify.h
@@ -2,26 +2,112 @@
 #include <linux/fsnotify_backend.h>
 #include <linux/path.h>
 #include <linux/slab.h>
+#include <linux/exportfs.h>
 
 extern struct kmem_cache *fanotify_mark_cache;
 extern struct kmem_cache *fanotify_event_cachep;
 extern struct kmem_cache *fanotify_perm_event_cachep;
 
+/* Possible states of the permission event */
+enum {
+	FAN_EVENT_INIT,
+	FAN_EVENT_REPORTED,
+	FAN_EVENT_ANSWERED,
+	FAN_EVENT_CANCELED,
+};
+
+/*
+ * 3 dwords are sufficient for most local fs (64bit ino, 32bit generation).
+ * For 32bit arch, fid increases the size of fanotify_event by 12 bytes and
+ * fh_* fields increase the size of fanotify_event by another 4 bytes.
+ * For 64bit arch, fid increases the size of fanotify_fid by 8 bytes and
+ * fh_* fields are packed in a hole after mask.
+ */
+#if BITS_PER_LONG == 32
+#define FANOTIFY_INLINE_FH_LEN	(3 << 2)
+#else
+#define FANOTIFY_INLINE_FH_LEN	(4 << 2)
+#endif
+
+struct fanotify_fid {
+	__kernel_fsid_t fsid;
+	union {
+		unsigned char fh[FANOTIFY_INLINE_FH_LEN];
+		unsigned char *ext_fh;
+	};
+};
+
+static inline void *fanotify_fid_fh(struct fanotify_fid *fid,
+				    unsigned int fh_len)
+{
+	return fh_len <= FANOTIFY_INLINE_FH_LEN ? fid->fh : fid->ext_fh;
+}
+
+static inline bool fanotify_fid_equal(struct fanotify_fid *fid1,
+				      struct fanotify_fid *fid2,
+				      unsigned int fh_len)
+{
+	return fid1->fsid.val[0] == fid2->fsid.val[0] &&
+		fid1->fsid.val[1] == fid2->fsid.val[1] &&
+		!memcmp(fanotify_fid_fh(fid1, fh_len),
+			fanotify_fid_fh(fid2, fh_len), fh_len);
+}
+
 /*
  * Structure for normal fanotify events. It gets allocated in
  * fanotify_handle_event() and freed when the information is retrieved by
  * userspace
  */
-struct fanotify_event_info {
+struct fanotify_event {
 	struct fsnotify_event fse;
+	u32 mask;
 	/*
-	 * We hold ref to this path so it may be dereferenced at any point
-	 * during this object's lifetime
+	 * Those fields are outside fanotify_fid to pack fanotify_event nicely
+	 * on 64bit arch and to use fh_type as an indication of whether path
+	 * or fid are used in the union:
+	 * FILEID_ROOT (0) for path, > 0 for fid, FILEID_INVALID for neither.
 	 */
-	struct path path;
+	u8 fh_type;
+	u8 fh_len;
+	u16 pad;
+	union {
+		/*
+		 * We hold ref to this path so it may be dereferenced at any
+		 * point during this object's lifetime
+		 */
+		struct path path;
+		/*
+		 * With FAN_REPORT_FID, we do not hold any reference on the
+		 * victim object. Instead we store its NFS file handle and its
+		 * filesystem's fsid as a unique identifier.
+		 */
+		struct fanotify_fid fid;
+	};
 	struct pid *pid;
 };
 
+static inline bool fanotify_event_has_path(struct fanotify_event *event)
+{
+	return event->fh_type == FILEID_ROOT;
+}
+
+static inline bool fanotify_event_has_fid(struct fanotify_event *event)
+{
+	return event->fh_type != FILEID_ROOT &&
+		event->fh_type != FILEID_INVALID;
+}
+
+static inline bool fanotify_event_has_ext_fh(struct fanotify_event *event)
+{
+	return fanotify_event_has_fid(event) &&
+		event->fh_len > FANOTIFY_INLINE_FH_LEN;
+}
+
+static inline void *fanotify_event_fh(struct fanotify_event *event)
+{
+	return fanotify_fid_fh(&event->fid, event->fh_len);
+}
+
 /*
  * Structure for permission fanotify events. It gets allocated and freed in
  * fanotify_handle_event() since we wait there for user response. When the
@@ -29,16 +115,17 @@ struct fanotify_event_info {
  * group->notification_list to group->fanotify_data.access_list to wait for
  * user response.
  */
-struct fanotify_perm_event_info {
-	struct fanotify_event_info fae;
-	int response;	/* userspace answer to question */
+struct fanotify_perm_event {
+	struct fanotify_event fae;
+	unsigned short response;	/* userspace answer to the event */
+	unsigned short state;		/* state of the event */
 	int fd;		/* fd we passed to userspace for this event */
 };
 
-static inline struct fanotify_perm_event_info *
+static inline struct fanotify_perm_event *
 FANOTIFY_PE(struct fsnotify_event *fse)
 {
-	return container_of(fse, struct fanotify_perm_event_info, fae.fse);
+	return container_of(fse, struct fanotify_perm_event, fae.fse);
 }
 
 static inline bool fanotify_is_perm_event(u32 mask)
@@ -47,11 +134,12 @@ static inline bool fanotify_is_perm_event(u32 mask)
 		mask & FANOTIFY_PERM_EVENTS;
 }
 
-static inline struct fanotify_event_info *FANOTIFY_E(struct fsnotify_event *fse)
+static inline struct fanotify_event *FANOTIFY_E(struct fsnotify_event *fse)
 {
-	return container_of(fse, struct fanotify_event_info, fse);
+	return container_of(fse, struct fanotify_event, fse);
 }
 
-struct fanotify_event_info *fanotify_alloc_event(struct fsnotify_group *group,
-						 struct inode *inode, u32 mask,
-						 const struct path *path);
+struct fanotify_event *fanotify_alloc_event(struct fsnotify_group *group,
+					    struct inode *inode, u32 mask,
+					    const void *data, int data_type,
+					    __kernel_fsid_t *fsid);
diff --git a/fs/notify/fanotify/fanotify_user.c b/fs/notify/fanotify/fanotify_user.c
index 9c870b0d2b56..91006f47e420 100644
--- a/fs/notify/fanotify/fanotify_user.c
+++ b/fs/notify/fanotify/fanotify_user.c
@@ -17,6 +17,8 @@
 #include <linux/compat.h>
 #include <linux/sched/signal.h>
 #include <linux/memcontrol.h>
+#include <linux/statfs.h>
+#include <linux/exportfs.h>
 
 #include <asm/ioctls.h>
 
@@ -47,33 +49,55 @@ struct kmem_cache *fanotify_mark_cache __read_mostly;
 struct kmem_cache *fanotify_event_cachep __read_mostly;
 struct kmem_cache *fanotify_perm_event_cachep __read_mostly;
 
+#define FANOTIFY_EVENT_ALIGN 4
+
+static int fanotify_event_info_len(struct fanotify_event *event)
+{
+	if (!fanotify_event_has_fid(event))
+		return 0;
+
+	return roundup(sizeof(struct fanotify_event_info_fid) +
+		       sizeof(struct file_handle) + event->fh_len,
+		       FANOTIFY_EVENT_ALIGN);
+}
+
 /*
  * Get an fsnotify notification event if one exists and is small
  * enough to fit in "count". Return an error pointer if the count
- * is not large enough.
- *
- * Called with the group->notification_lock held.
+ * is not large enough. When permission event is dequeued, its state is
+ * updated accordingly.
  */
 static struct fsnotify_event *get_one_event(struct fsnotify_group *group,
 					    size_t count)
 {
-	assert_spin_locked(&group->notification_lock);
+	size_t event_size = FAN_EVENT_METADATA_LEN;
+	struct fsnotify_event *fsn_event = NULL;
 
 	pr_debug("%s: group=%p count=%zd\n", __func__, group, count);
 
+	spin_lock(&group->notification_lock);
 	if (fsnotify_notify_queue_is_empty(group))
-		return NULL;
+		goto out;
 
-	if (FAN_EVENT_METADATA_LEN > count)
-		return ERR_PTR(-EINVAL);
+	if (FAN_GROUP_FLAG(group, FAN_REPORT_FID)) {
+		event_size += fanotify_event_info_len(
+			FANOTIFY_E(fsnotify_peek_first_event(group)));
+	}
 
-	/* held the notification_lock the whole time, so this is the
-	 * same event we peeked above */
-	return fsnotify_remove_first_event(group);
+	if (event_size > count) {
+		fsn_event = ERR_PTR(-EINVAL);
+		goto out;
+	}
+	fsn_event = fsnotify_remove_first_event(group);
+	if (fanotify_is_perm_event(FANOTIFY_E(fsn_event)->mask))
+		FANOTIFY_PE(fsn_event)->state = FAN_EVENT_REPORTED;
+out:
+	spin_unlock(&group->notification_lock);
+	return fsn_event;
 }
 
 static int create_fd(struct fsnotify_group *group,
-		     struct fanotify_event_info *event,
+		     struct fanotify_event *event,
 		     struct file **file)
 {
 	int client_fd;
@@ -114,62 +138,32 @@ static int create_fd(struct fsnotify_group *group,
 	return client_fd;
 }
 
-static int fill_event_metadata(struct fsnotify_group *group,
-			       struct fanotify_event_metadata *metadata,
-			       struct fsnotify_event *fsn_event,
-			       struct file **file)
-{
-	int ret = 0;
-	struct fanotify_event_info *event;
-
-	pr_debug("%s: group=%p metadata=%p event=%p\n", __func__,
-		 group, metadata, fsn_event);
-
-	*file = NULL;
-	event = container_of(fsn_event, struct fanotify_event_info, fse);
-	metadata->event_len = FAN_EVENT_METADATA_LEN;
-	metadata->metadata_len = FAN_EVENT_METADATA_LEN;
-	metadata->vers = FANOTIFY_METADATA_VERSION;
-	metadata->reserved = 0;
-	metadata->mask = fsn_event->mask & FANOTIFY_OUTGOING_EVENTS;
-	metadata->pid = pid_vnr(event->pid);
-	if (unlikely(fsn_event->mask & FAN_Q_OVERFLOW))
-		metadata->fd = FAN_NOFD;
-	else {
-		metadata->fd = create_fd(group, event, file);
-		if (metadata->fd < 0)
-			ret = metadata->fd;
-	}
-
-	return ret;
-}
-
-static struct fanotify_perm_event_info *dequeue_event(
-				struct fsnotify_group *group, int fd)
+/*
+ * Finish processing of permission event by setting it to ANSWERED state and
+ * drop group->notification_lock.
+ */
+static void finish_permission_event(struct fsnotify_group *group,
+				    struct fanotify_perm_event *event,
+				    unsigned int response)
+				    __releases(&group->notification_lock)
 {
-	struct fanotify_perm_event_info *event, *return_e = NULL;
+	bool destroy = false;
 
-	spin_lock(&group->notification_lock);
-	list_for_each_entry(event, &group->fanotify_data.access_list,
-			    fae.fse.list) {
-		if (event->fd != fd)
-			continue;
-
-		list_del_init(&event->fae.fse.list);
-		return_e = event;
-		break;
-	}
+	assert_spin_locked(&group->notification_lock);
+	event->response = response;
+	if (event->state == FAN_EVENT_CANCELED)
+		destroy = true;
+	else
+		event->state = FAN_EVENT_ANSWERED;
 	spin_unlock(&group->notification_lock);
-
-	pr_debug("%s: found return_re=%p\n", __func__, return_e);
-
-	return return_e;
+	if (destroy)
+		fsnotify_destroy_event(group, &event->fae.fse);
 }
 
 static int process_access_response(struct fsnotify_group *group,
 				   struct fanotify_response *response_struct)
 {
-	struct fanotify_perm_event_info *event;
+	struct fanotify_perm_event *event;
 	int fd = response_struct->fd;
 	int response = response_struct->response;
 
@@ -194,48 +188,125 @@ static int process_access_response(struct fsnotify_group *group,
 	if ((response & FAN_AUDIT) && !FAN_GROUP_FLAG(group, FAN_ENABLE_AUDIT))
 		return -EINVAL;
 
-	event = dequeue_event(group, fd);
-	if (!event)
-		return -ENOENT;
+	spin_lock(&group->notification_lock);
+	list_for_each_entry(event, &group->fanotify_data.access_list,
+			    fae.fse.list) {
+		if (event->fd != fd)
+			continue;
 
-	event->response = response;
-	wake_up(&group->fanotify_data.access_waitq);
+		list_del_init(&event->fae.fse.list);
+		finish_permission_event(group, event, response);
+		wake_up(&group->fanotify_data.access_waitq);
+		return 0;
+	}
+	spin_unlock(&group->notification_lock);
+
+	return -ENOENT;
+}
+
+static int copy_fid_to_user(struct fanotify_event *event, char __user *buf)
+{
+	struct fanotify_event_info_fid info = { };
+	struct file_handle handle = { };
+	unsigned char bounce[FANOTIFY_INLINE_FH_LEN], *fh;
+	size_t fh_len = event->fh_len;
+	size_t len = fanotify_event_info_len(event);
+
+	if (!len)
+		return 0;
+
+	if (WARN_ON_ONCE(len < sizeof(info) + sizeof(handle) + fh_len))
+		return -EFAULT;
+
+	/* Copy event info fid header followed by vaiable sized file handle */
+	info.hdr.info_type = FAN_EVENT_INFO_TYPE_FID;
+	info.hdr.len = len;
+	info.fsid = event->fid.fsid;
+	if (copy_to_user(buf, &info, sizeof(info)))
+		return -EFAULT;
+
+	buf += sizeof(info);
+	len -= sizeof(info);
+	handle.handle_type = event->fh_type;
+	handle.handle_bytes = fh_len;
+	if (copy_to_user(buf, &handle, sizeof(handle)))
+		return -EFAULT;
+
+	buf += sizeof(handle);
+	len -= sizeof(handle);
+	/*
+	 * For an inline fh, copy through stack to exclude the copy from
+	 * usercopy hardening protections.
+	 */
+	fh = fanotify_event_fh(event);
+	if (fh_len <= FANOTIFY_INLINE_FH_LEN) {
+		memcpy(bounce, fh, fh_len);
+		fh = bounce;
+	}
+	if (copy_to_user(buf, fh, fh_len))
+		return -EFAULT;
+
+	/* Pad with 0's */
+	buf += fh_len;
+	len -= fh_len;
+	WARN_ON_ONCE(len < 0 || len >= FANOTIFY_EVENT_ALIGN);
+	if (len > 0 && clear_user(buf, len))
+		return -EFAULT;
 
 	return 0;
 }
 
 static ssize_t copy_event_to_user(struct fsnotify_group *group,
-				  struct fsnotify_event *event,
+				  struct fsnotify_event *fsn_event,
 				  char __user *buf, size_t count)
 {
-	struct fanotify_event_metadata fanotify_event_metadata;
-	struct file *f;
-	int fd, ret;
-
-	pr_debug("%s: group=%p event=%p\n", __func__, group, event);
-
-	ret = fill_event_metadata(group, &fanotify_event_metadata, event, &f);
-	if (ret < 0)
-		return ret;
+	struct fanotify_event_metadata metadata;
+	struct fanotify_event *event;
+	struct file *f = NULL;
+	int ret, fd = FAN_NOFD;
+
+	pr_debug("%s: group=%p event=%p\n", __func__, group, fsn_event);
+
+	event = container_of(fsn_event, struct fanotify_event, fse);
+	metadata.event_len = FAN_EVENT_METADATA_LEN;
+	metadata.metadata_len = FAN_EVENT_METADATA_LEN;
+	metadata.vers = FANOTIFY_METADATA_VERSION;
+	metadata.reserved = 0;
+	metadata.mask = event->mask & FANOTIFY_OUTGOING_EVENTS;
+	metadata.pid = pid_vnr(event->pid);
+
+	if (fanotify_event_has_path(event)) {
+		fd = create_fd(group, event, &f);
+		if (fd < 0)
+			return fd;
+	} else if (fanotify_event_has_fid(event)) {
+		metadata.event_len += fanotify_event_info_len(event);
+	}
+	metadata.fd = fd;
 
-	fd = fanotify_event_metadata.fd;
 	ret = -EFAULT;
 	/*
 	 * Sanity check copy size in case get_one_event() and
 	 * fill_event_metadata() event_len sizes ever get out of sync.
 	 */
-	if (WARN_ON_ONCE(fanotify_event_metadata.event_len > count))
+	if (WARN_ON_ONCE(metadata.event_len > count))
 		goto out_close_fd;
-	if (copy_to_user(buf, &fanotify_event_metadata,
-			 fanotify_event_metadata.event_len))
+
+	if (copy_to_user(buf, &metadata, FAN_EVENT_METADATA_LEN))
 		goto out_close_fd;
 
 	if (fanotify_is_perm_event(event->mask))
-		FANOTIFY_PE(event)->fd = fd;
+		FANOTIFY_PE(fsn_event)->fd = fd;
 
-	if (fd != FAN_NOFD)
+	if (fanotify_event_has_path(event)) {
 		fd_install(fd, f);
-	return fanotify_event_metadata.event_len;
+	} else if (fanotify_event_has_fid(event)) {
+		ret = copy_fid_to_user(event, buf + FAN_EVENT_METADATA_LEN);
+		if (ret < 0)
+			return ret;
+	}
+
+	return metadata.event_len;
 
 out_close_fd:
 	if (fd != FAN_NOFD) {
@@ -276,10 +347,7 @@ static ssize_t fanotify_read(struct file *file, char __user *buf,
 
 	add_wait_queue(&group->notification_waitq, &wait);
 	while (1) {
-		spin_lock(&group->notification_lock);
 		kevent = get_one_event(group, count);
-		spin_unlock(&group->notification_lock);
-
 		if (IS_ERR(kevent)) {
 			ret = PTR_ERR(kevent);
 			break;
@@ -316,11 +384,13 @@ static ssize_t fanotify_read(struct file *file, char __user *buf,
 		 * Permission events get queued to wait for response.  Other
 		 * events can be destroyed now.
 		 */
-		if (!fanotify_is_perm_event(kevent->mask)) {
+		if (!fanotify_is_perm_event(FANOTIFY_E(kevent)->mask)) {
 			fsnotify_destroy_event(group, kevent);
 		} else {
 			if (ret <= 0) {
-				FANOTIFY_PE(kevent)->response = FAN_DENY;
+				spin_lock(&group->notification_lock);
+				finish_permission_event(group,
+					FANOTIFY_PE(kevent), FAN_DENY);
 				wake_up(&group->fanotify_data.access_waitq);
 			} else {
 				spin_lock(&group->notification_lock);
@@ -370,7 +440,7 @@ static ssize_t fanotify_write(struct file *file, const char __user *buf, size_t
 static int fanotify_release(struct inode *ignored, struct file *file)
 {
 	struct fsnotify_group *group = file->private_data;
-	struct fanotify_perm_event_info *event, *next;
+	struct fanotify_perm_event *event;
 	struct fsnotify_event *fsn_event;
 
 	/*
@@ -385,13 +455,12 @@ static int fanotify_release(struct inode *ignored, struct file *file)
 	 * and simulate reply from userspace.
 	 */
 	spin_lock(&group->notification_lock);
-	list_for_each_entry_safe(event, next, &group->fanotify_data.access_list,
-				 fae.fse.list) {
-		pr_debug("%s: found group=%p event=%p\n", __func__, group,
-			 event);
-
+	while (!list_empty(&group->fanotify_data.access_list)) {
+		event = list_first_entry(&group->fanotify_data.access_list,
+				struct fanotify_perm_event, fae.fse.list);
 		list_del_init(&event->fae.fse.list);
-		event->response = FAN_ALLOW;
+		finish_permission_event(group, event, FAN_ALLOW);
+		spin_lock(&group->notification_lock);
 	}
 
 	/*
@@ -401,13 +470,14 @@ static int fanotify_release(struct inode *ignored, struct file *file)
 	 */
 	while (!fsnotify_notify_queue_is_empty(group)) {
 		fsn_event = fsnotify_remove_first_event(group);
-		if (!(fsn_event->mask & FANOTIFY_PERM_EVENTS)) {
+		if (!(FANOTIFY_E(fsn_event)->mask & FANOTIFY_PERM_EVENTS)) {
 			spin_unlock(&group->notification_lock);
 			fsnotify_destroy_event(group, fsn_event);
-			spin_lock(&group->notification_lock);
 		} else {
-			FANOTIFY_PE(fsn_event)->response = FAN_ALLOW;
+			finish_permission_event(group, FANOTIFY_PE(fsn_event),
+						FAN_ALLOW);
 		}
+		spin_lock(&group->notification_lock);
 	}
 	spin_unlock(&group->notification_lock);
 
@@ -598,7 +668,8 @@ static __u32 fanotify_mark_add_to_mask(struct fsnotify_mark *fsn_mark,
 
 static struct fsnotify_mark *fanotify_add_new_mark(struct fsnotify_group *group,
 						   fsnotify_connp_t *connp,
-						   unsigned int type)
+						   unsigned int type,
+						   __kernel_fsid_t *fsid)
 {
 	struct fsnotify_mark *mark;
 	int ret;
@@ -611,7 +682,7 @@ static struct fsnotify_mark *fanotify_add_new_mark(struct fsnotify_group *group,
 		return ERR_PTR(-ENOMEM);
 
 	fsnotify_init_mark(mark, group);
-	ret = fsnotify_add_mark_locked(mark, connp, type, 0);
+	ret = fsnotify_add_mark_locked(mark, connp, type, 0, fsid);
 	if (ret) {
 		fsnotify_put_mark(mark);
 		return ERR_PTR(ret);
@@ -623,7 +694,8 @@ static struct fsnotify_mark *fanotify_add_new_mark(struct fsnotify_group *group,
 
 static int fanotify_add_mark(struct fsnotify_group *group,
 			     fsnotify_connp_t *connp, unsigned int type,
-			     __u32 mask, unsigned int flags)
+			     __u32 mask, unsigned int flags,
+			     __kernel_fsid_t *fsid)
 {
 	struct fsnotify_mark *fsn_mark;
 	__u32 added;
@@ -631,7 +703,7 @@ static int fanotify_add_mark(struct fsnotify_group *group,
 	mutex_lock(&group->mark_mutex);
 	fsn_mark = fsnotify_find_mark(connp, group);
 	if (!fsn_mark) {
-		fsn_mark = fanotify_add_new_mark(group, connp, type);
+		fsn_mark = fanotify_add_new_mark(group, connp, type, fsid);
 		if (IS_ERR(fsn_mark)) {
 			mutex_unlock(&group->mark_mutex);
 			return PTR_ERR(fsn_mark);
@@ -648,23 +720,23 @@ static int fanotify_add_mark(struct fsnotify_group *group,
 
 static int fanotify_add_vfsmount_mark(struct fsnotify_group *group,
 				      struct vfsmount *mnt, __u32 mask,
-				      unsigned int flags)
+				      unsigned int flags, __kernel_fsid_t *fsid)
 {
 	return fanotify_add_mark(group, &real_mount(mnt)->mnt_fsnotify_marks,
-				 FSNOTIFY_OBJ_TYPE_VFSMOUNT, mask, flags);
+				 FSNOTIFY_OBJ_TYPE_VFSMOUNT, mask, flags, fsid);
 }
 
 static int fanotify_add_sb_mark(struct fsnotify_group *group,
-				      struct super_block *sb, __u32 mask,
-				      unsigned int flags)
+				struct super_block *sb, __u32 mask,
+				unsigned int flags, __kernel_fsid_t *fsid)
 {
 	return fanotify_add_mark(group, &sb->s_fsnotify_marks,
-				 FSNOTIFY_OBJ_TYPE_SB, mask, flags);
+				 FSNOTIFY_OBJ_TYPE_SB, mask, flags, fsid);
 }
 
 static int fanotify_add_inode_mark(struct fsnotify_group *group,
 				   struct inode *inode, __u32 mask,
-				   unsigned int flags)
+				   unsigned int flags, __kernel_fsid_t *fsid)
 {
 	pr_debug("%s: group=%p inode=%p\n", __func__, group, inode);
 
@@ -679,7 +751,7 @@ static int fanotify_add_inode_mark(struct fsnotify_group *group,
 		return 0;
 
 	return fanotify_add_mark(group, &inode->i_fsnotify_marks,
-				 FSNOTIFY_OBJ_TYPE_INODE, mask, flags);
+				 FSNOTIFY_OBJ_TYPE_INODE, mask, flags, fsid);
 }
 
 /* fanotify syscalls */
@@ -688,7 +760,7 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
 	struct fsnotify_group *group;
 	int f_flags, fd;
 	struct user_struct *user;
-	struct fanotify_event_info *oevent;
+	struct fanotify_event *oevent;
 
 	pr_debug("%s: flags=%x event_f_flags=%x\n",
 		 __func__, flags, event_f_flags);
@@ -715,6 +787,10 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
 		return -EINVAL;
 	}
 
+	if ((flags & FAN_REPORT_FID) &&
+	    (flags & FANOTIFY_CLASS_BITS) != FAN_CLASS_NOTIF)
+		return -EINVAL;
+
 	user = get_current_user();
 	if (atomic_read(&user->fanotify_listeners) > FANOTIFY_DEFAULT_MAX_LISTENERS) {
 		free_uid(user);
@@ -739,7 +815,8 @@ SYSCALL_DEFINE2(fanotify_init, unsigned int, flags, unsigned int, event_f_flags)
 	atomic_inc(&user->fanotify_listeners);
 	group->memcg = get_mem_cgroup_from_mm(current->mm);
 
-	oevent = fanotify_alloc_event(group, NULL, FS_Q_OVERFLOW, NULL);
+	oevent = fanotify_alloc_event(group, NULL, FS_Q_OVERFLOW, NULL,
+				      FSNOTIFY_EVENT_NONE, NULL);
 	if (unlikely(!oevent)) {
 		fd = -ENOMEM;
 		goto out_destroy_group;
@@ -801,6 +878,64 @@ out_destroy_group:
 	return fd;
 }
 
+/* Check if filesystem can encode a unique fid */
+static int fanotify_test_fid(struct path *path, __kernel_fsid_t *fsid)
+{
+	__kernel_fsid_t root_fsid;
+	int err;
+
+	/*
+	 * Make sure path is not in filesystem with zero fsid (e.g. tmpfs).
+	 */
+	err = vfs_get_fsid(path->dentry, fsid);
+	if (err)
+		return err;
+
+	if (!fsid->val[0] && !fsid->val[1])
+		return -ENODEV;
+
+	/*
+	 * Make sure path is not inside a filesystem subvolume (e.g. btrfs)
+	 * which uses a different fsid than sb root.
+	 */
+	err = vfs_get_fsid(path->dentry->d_sb->s_root, &root_fsid);
+	if (err)
+		return err;
+
+	if (root_fsid.val[0] != fsid->val[0] ||
+	    root_fsid.val[1] != fsid->val[1])
+		return -EXDEV;
+
+	/*
+	 * We need to make sure that the file system supports at least
+	 * encoding a file handle so user can use name_to_handle_at() to
+	 * compare fid returned with event to the file handle of watched
+	 * objects. However, name_to_handle_at() requires that the
+	 * filesystem also supports decoding file handles.
+	 */
+	if (!path->dentry->d_sb->s_export_op ||
+	    !path->dentry->d_sb->s_export_op->fh_to_dentry)
+		return -EOPNOTSUPP;
+
+	return 0;
+}
+
+static int fanotify_events_supported(struct path *path, __u64 mask)
+{
+	/*
+	 * Some filesystems such as 'proc' acquire unusual locks when opening
+	 * files. For them fanotify permission events have high chances of
+	 * deadlocking the system - open done when reporting fanotify event
+	 * blocks on this "unusual" lock while another process holding the lock
+	 * waits for fanotify permission event to be answered. Just disallow
+	 * permission events for such filesystems.
+	 */
+	if (mask & FANOTIFY_PERM_EVENTS &&
+	    path->mnt->mnt_sb->s_type->fs_flags & FS_DISALLOW_NOTIFY_PERM)
+		return -EINVAL;
+	return 0;
+}
+
 static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
 			    int dfd, const char  __user *pathname)
 {
@@ -809,6 +944,7 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
 	struct fsnotify_group *group;
 	struct fd f;
 	struct path path;
+	__kernel_fsid_t __fsid, *fsid = NULL;
 	u32 valid_mask = FANOTIFY_EVENTS | FANOTIFY_EVENT_FLAGS;
 	unsigned int mark_type = flags & FANOTIFY_MARK_TYPE_BITS;
 	int ret;
@@ -871,6 +1007,18 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
 	    group->priority == FS_PRIO_0)
 		goto fput_and_out;
 
+	/*
+	 * Events with data type inode do not carry enough information to report
+	 * event->fd, so we do not allow setting a mask for inode events unless
+	 * group supports reporting fid.
+	 * inode events are not supported on a mount mark, because they do not
+	 * carry enough information (i.e. path) to be filtered by mount point.
+	 */
+	if (mask & FANOTIFY_INODE_EVENTS &&
+	    (!FAN_GROUP_FLAG(group, FAN_REPORT_FID) ||
+	     mark_type == FAN_MARK_MOUNT))
+		goto fput_and_out;
+
 	if (flags & FAN_MARK_FLUSH) {
 		ret = 0;
 		if (mark_type == FAN_MARK_MOUNT)
@@ -886,6 +1034,20 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
 	if (ret)
 		goto fput_and_out;
 
+	if (flags & FAN_MARK_ADD) {
+		ret = fanotify_events_supported(&path, mask);
+		if (ret)
+			goto path_put_and_out;
+	}
+
+	if (FAN_GROUP_FLAG(group, FAN_REPORT_FID)) {
+		ret = fanotify_test_fid(&path, &__fsid);
+		if (ret)
+			goto path_put_and_out;
+
+		fsid = &__fsid;
+	}
+
 	/* inode held in place by reference to path; group by fget on fd */
 	if (mark_type == FAN_MARK_INODE)
 		inode = path.dentry->d_inode;
@@ -896,24 +1058,31 @@ static int do_fanotify_mark(int fanotify_fd, unsigned int flags, __u64 mask,
 	switch (flags & (FAN_MARK_ADD | FAN_MARK_REMOVE)) {
 	case FAN_MARK_ADD:
 		if (mark_type == FAN_MARK_MOUNT)
-			ret = fanotify_add_vfsmount_mark(group, mnt, mask, flags);
+			ret = fanotify_add_vfsmount_mark(group, mnt, mask,
+							 flags, fsid);
 		else if (mark_type == FAN_MARK_FILESYSTEM)
-			ret = fanotify_add_sb_mark(group, mnt->mnt_sb, mask, flags);
+			ret = fanotify_add_sb_mark(group, mnt->mnt_sb, mask,
+						   flags, fsid);
 		else
-			ret = fanotify_add_inode_mark(group, inode, mask, flags);
+			ret = fanotify_add_inode_mark(group, inode, mask,
+						      flags, fsid);
 		break;
 	case FAN_MARK_REMOVE:
 		if (mark_type == FAN_MARK_MOUNT)
-			ret = fanotify_remove_vfsmount_mark(group, mnt, mask, flags);
+			ret = fanotify_remove_vfsmount_mark(group, mnt, mask,
+							    flags);
 		else if (mark_type == FAN_MARK_FILESYSTEM)
-			ret = fanotify_remove_sb_mark(group, mnt->mnt_sb, mask, flags);
+			ret = fanotify_remove_sb_mark(group, mnt->mnt_sb, mask,
+						      flags);
 		else
-			ret = fanotify_remove_inode_mark(group, inode, mask, flags);
+			ret = fanotify_remove_inode_mark(group, inode, mask,
+							 flags);
 		break;
 	default:
 		ret = -EINVAL;
 	}
 
+path_put_and_out:
 	path_put(&path);
 fput_and_out:
 	fdput(f);
@@ -950,15 +1119,15 @@ COMPAT_SYSCALL_DEFINE6(fanotify_mark,
  */
 static int __init fanotify_user_setup(void)
 {
-	BUILD_BUG_ON(HWEIGHT32(FANOTIFY_INIT_FLAGS) != 7);
+	BUILD_BUG_ON(HWEIGHT32(FANOTIFY_INIT_FLAGS) != 8);
 	BUILD_BUG_ON(HWEIGHT32(FANOTIFY_MARK_FLAGS) != 9);
 
 	fanotify_mark_cache = KMEM_CACHE(fsnotify_mark,
 					 SLAB_PANIC|SLAB_ACCOUNT);
-	fanotify_event_cachep = KMEM_CACHE(fanotify_event_info, SLAB_PANIC);
+	fanotify_event_cachep = KMEM_CACHE(fanotify_event, SLAB_PANIC);
 	if (IS_ENABLED(CONFIG_FANOTIFY_ACCESS_PERMISSIONS)) {
 		fanotify_perm_event_cachep =
-			KMEM_CACHE(fanotify_perm_event_info, SLAB_PANIC);
+			KMEM_CACHE(fanotify_perm_event, SLAB_PANIC);
 	}
 
 	return 0;
diff --git a/fs/notify/fsnotify.c b/fs/notify/fsnotify.c
index ecf09b6243d9..2ecef6155fc0 100644
--- a/fs/notify/fsnotify.c
+++ b/fs/notify/fsnotify.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2, or (at your option)
- *  any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; see the file COPYING.  If not, write to
- *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include <linux/dcache.h>
@@ -179,10 +166,10 @@ int __fsnotify_parent(const struct path *path, struct dentry *dentry, __u32 mask
 		take_dentry_name_snapshot(&name, dentry);
 		if (path)
 			ret = fsnotify(p_inode, mask, path, FSNOTIFY_EVENT_PATH,
-				       name.name, 0);
+				       &name.name, 0);
 		else
 			ret = fsnotify(p_inode, mask, dentry->d_inode, FSNOTIFY_EVENT_INODE,
-				       name.name, 0);
+				       &name.name, 0);
 		release_dentry_name_snapshot(&name);
 	}
 
@@ -195,7 +182,7 @@ EXPORT_SYMBOL_GPL(__fsnotify_parent);
 static int send_to_group(struct inode *to_tell,
 			 __u32 mask, const void *data,
 			 int data_is, u32 cookie,
-			 const unsigned char *file_name,
+			 const struct qstr *file_name,
 			 struct fsnotify_iter_info *iter_info)
 {
 	struct fsnotify_group *group = NULL;
@@ -325,19 +312,18 @@ static void fsnotify_iter_next(struct fsnotify_iter_info *iter_info)
  * notification event in whatever means they feel necessary.
  */
 int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
-	     const unsigned char *file_name, u32 cookie)
+	     const struct qstr *file_name, u32 cookie)
 {
 	struct fsnotify_iter_info iter_info = {};
-	struct super_block *sb = NULL;
+	struct super_block *sb = to_tell->i_sb;
 	struct mount *mnt = NULL;
-	__u32 mnt_or_sb_mask = 0;
+	__u32 mnt_or_sb_mask = sb->s_fsnotify_mask;
 	int ret = 0;
 	__u32 test_mask = (mask & ALL_FSNOTIFY_EVENTS);
 
 	if (data_is == FSNOTIFY_EVENT_PATH) {
 		mnt = real_mount(((const struct path *)data)->mnt);
-		sb = mnt->mnt.mnt_sb;
-		mnt_or_sb_mask = mnt->mnt_fsnotify_mask | sb->s_fsnotify_mask;
+		mnt_or_sb_mask |= mnt->mnt_fsnotify_mask;
 	}
 	/* An event "on child" is not intended for a mount/sb mark */
 	if (mask & FS_EVENT_ON_CHILD)
@@ -350,8 +336,8 @@ int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
 	 * SRCU because we have no references to any objects and do not
 	 * need SRCU to keep them "alive".
 	 */
-	if (!to_tell->i_fsnotify_marks &&
-	    (!mnt || (!mnt->mnt_fsnotify_marks && !sb->s_fsnotify_marks)))
+	if (!to_tell->i_fsnotify_marks && !sb->s_fsnotify_marks &&
+	    (!mnt || !mnt->mnt_fsnotify_marks))
 		return 0;
 	/*
 	 * if this is a modify event we may need to clear the ignored masks
@@ -366,11 +352,11 @@ int fsnotify(struct inode *to_tell, __u32 mask, const void *data, int data_is,
 
 	iter_info.marks[FSNOTIFY_OBJ_TYPE_INODE] =
 		fsnotify_first_mark(&to_tell->i_fsnotify_marks);
+	iter_info.marks[FSNOTIFY_OBJ_TYPE_SB] =
+		fsnotify_first_mark(&sb->s_fsnotify_marks);
 	if (mnt) {
 		iter_info.marks[FSNOTIFY_OBJ_TYPE_VFSMOUNT] =
 			fsnotify_first_mark(&mnt->mnt_fsnotify_marks);
-		iter_info.marks[FSNOTIFY_OBJ_TYPE_SB] =
-			fsnotify_first_mark(&sb->s_fsnotify_marks);
 	}
 
 	/*
diff --git a/fs/notify/group.c b/fs/notify/group.c
index c03b83662876..0391190305cc 100644
--- a/fs/notify/group.c
+++ b/fs/notify/group.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2, or (at your option)
- *  any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; see the file COPYING.  If not, write to
- *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 #include <linux/list.h>
diff --git a/fs/notify/inotify/Kconfig b/fs/notify/inotify/Kconfig
index b981fc0c8379..6736e47d94d8 100644
--- a/fs/notify/inotify/Kconfig
+++ b/fs/notify/inotify/Kconfig
@@ -1,6 +1,6 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config INOTIFY_USER
 	bool "Inotify support for userspace"
-	select ANON_INODES
 	select FSNOTIFY
 	default y
 	---help---
diff --git a/fs/notify/inotify/Makefile b/fs/notify/inotify/Makefile
index a380dabe09de..812237eecf3a 100644
--- a/fs/notify/inotify/Makefile
+++ b/fs/notify/inotify/Makefile
@@ -1 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_INOTIFY_USER)	+= inotify_fsnotify.o inotify_user.o
diff --git a/fs/notify/inotify/inotify.h b/fs/notify/inotify/inotify.h
index 7e4578d35b61..3f246f7b8a92 100644
--- a/fs/notify/inotify/inotify.h
+++ b/fs/notify/inotify/inotify.h
@@ -5,6 +5,7 @@
 
 struct inotify_event_info {
 	struct fsnotify_event fse;
+	u32 mask;
 	int wd;
 	u32 sync_cookie;
 	int name_len;
@@ -26,7 +27,7 @@ extern void inotify_ignored_and_remove_idr(struct fsnotify_mark *fsn_mark,
 extern int inotify_handle_event(struct fsnotify_group *group,
 				struct inode *inode,
 				u32 mask, const void *data, int data_type,
-				const unsigned char *file_name, u32 cookie,
+				const struct qstr *file_name, u32 cookie,
 				struct fsnotify_iter_info *iter_info);
 
 extern const struct fsnotify_ops inotify_fsnotify_ops;
diff --git a/fs/notify/inotify/inotify_fsnotify.c b/fs/notify/inotify/inotify_fsnotify.c
index f4184b4f3815..d510223d302c 100644
--- a/fs/notify/inotify/inotify_fsnotify.c
+++ b/fs/notify/inotify/inotify_fsnotify.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * fs/inotify_user.c - inotify support for userspace
  *
@@ -10,16 +11,6 @@
  *
  * Copyright (C) 2009 Eric Paris <Red Hat Inc>
  * inotify was largely rewriten to make use of the fsnotify infrastructure
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/dcache.h> /* d_unlinked */
@@ -43,11 +34,11 @@ static bool event_compare(struct fsnotify_event *old_fsn,
 {
 	struct inotify_event_info *old, *new;
 
-	if (old_fsn->mask & FS_IN_IGNORED)
-		return false;
 	old = INOTIFY_E(old_fsn);
 	new = INOTIFY_E(new_fsn);
-	if ((old_fsn->mask == new_fsn->mask) &&
+	if (old->mask & FS_IN_IGNORED)
+		return false;
+	if ((old->mask == new->mask) &&
 	    (old_fsn->inode == new_fsn->inode) &&
 	    (old->name_len == new->name_len) &&
 	    (!old->name_len || !strcmp(old->name, new->name)))
@@ -67,7 +58,7 @@ static int inotify_merge(struct list_head *list,
 int inotify_handle_event(struct fsnotify_group *group,
 			 struct inode *inode,
 			 u32 mask, const void *data, int data_type,
-			 const unsigned char *file_name, u32 cookie,
+			 const struct qstr *file_name, u32 cookie,
 			 struct fsnotify_iter_info *iter_info)
 {
 	struct fsnotify_mark *inode_mark = fsnotify_iter_inode_mark(iter_info);
@@ -89,7 +80,7 @@ int inotify_handle_event(struct fsnotify_group *group,
 			return 0;
 	}
 	if (file_name) {
-		len = strlen(file_name);
+		len = file_name->len;
 		alloc_len += len + 1;
 	}
 
@@ -99,9 +90,13 @@ int inotify_handle_event(struct fsnotify_group *group,
 	i_mark = container_of(inode_mark, struct inotify_inode_mark,
 			      fsn_mark);
 
-	/* Whoever is interested in the event, pays for the allocation. */
+	/*
+	 * Whoever is interested in the event, pays for the allocation. Do not
+	 * trigger OOM killer in the target monitoring memcg as it may have
+	 * security repercussion.
+	 */
 	memalloc_use_memcg(group->memcg);
-	event = kmalloc(alloc_len, GFP_KERNEL_ACCOUNT);
+	event = kmalloc(alloc_len, GFP_KERNEL_ACCOUNT | __GFP_RETRY_MAYFAIL);
 	memalloc_unuse_memcg();
 
 	if (unlikely(!event)) {
@@ -113,13 +108,23 @@ int inotify_handle_event(struct fsnotify_group *group,
 		return -ENOMEM;
 	}
 
+	/*
+	 * We now report FS_ISDIR flag with MOVE_SELF and DELETE_SELF events
+	 * for fanotify. inotify never reported IN_ISDIR with those events.
+	 * It looks like an oversight, but to avoid the risk of breaking
+	 * existing inotify programs, mask the flag out from those events.
+	 */
+	if (mask & (IN_MOVE_SELF | IN_DELETE_SELF))
+		mask &= ~IN_ISDIR;
+
 	fsn_event = &event->fse;
-	fsnotify_init_event(fsn_event, inode, mask);
+	fsnotify_init_event(fsn_event, inode);
+	event->mask = mask;
 	event->wd = i_mark->wd;
 	event->sync_cookie = cookie;
 	event->name_len = len;
 	if (len)
-		strcpy(event->name, file_name);
+		strcpy(event->name, file_name->name);
 
 	ret = fsnotify_add_event(group, fsn_event, inotify_merge);
 	if (ret) {
diff --git a/fs/notify/inotify/inotify_user.c b/fs/notify/inotify/inotify_user.c
index 798f1253141a..cce8de32779f 100644
--- a/fs/notify/inotify/inotify_user.c
+++ b/fs/notify/inotify/inotify_user.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * fs/inotify_user.c - inotify support for userspace
  *
@@ -10,16 +11,6 @@
  *
  * Copyright (C) 2009 Eric Paris <Red Hat Inc>
  * inotify was largely rewriten to make use of the fsnotify infrastructure
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the
- * Free Software Foundation; either version 2, or (at your option) any
- * later version.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/file.h>
@@ -189,7 +180,7 @@ static ssize_t copy_event_to_user(struct fsnotify_group *group,
 	 */
 	pad_name_len = round_event_name_len(fsn_event);
 	inotify_event.len = pad_name_len;
-	inotify_event.mask = inotify_mask_to_arg(fsn_event->mask);
+	inotify_event.mask = inotify_mask_to_arg(event->mask);
 	inotify_event.wd = event->wd;
 	inotify_event.cookie = event->sync_cookie;
 
@@ -519,8 +510,10 @@ static int inotify_update_existing_watch(struct fsnotify_group *group,
 	fsn_mark = fsnotify_find_mark(&inode->i_fsnotify_marks, group);
 	if (!fsn_mark)
 		return -ENOENT;
-	else if (create)
-		return -EEXIST;
+	else if (create) {
+		ret = -EEXIST;
+		goto out;
+	}
 
 	i_mark = container_of(fsn_mark, struct inotify_inode_mark, fsn_mark);
 
@@ -548,6 +541,7 @@ static int inotify_update_existing_watch(struct fsnotify_group *group,
 	/* return the wd */
 	ret = i_mark->wd;
 
+out:
 	/* match the get from fsnotify_find_mark() */
 	fsnotify_put_mark(fsn_mark);
 
@@ -634,7 +628,8 @@ static struct fsnotify_group *inotify_new_group(unsigned int max_events)
 		return ERR_PTR(-ENOMEM);
 	}
 	group->overflow_event = &oevent->fse;
-	fsnotify_init_event(group->overflow_event, NULL, FS_Q_OVERFLOW);
+	fsnotify_init_event(group->overflow_event, NULL);
+	oevent->mask = FS_Q_OVERFLOW;
 	oevent->wd = -1;
 	oevent->sync_cookie = 0;
 	oevent->name_len = 0;
diff --git a/fs/notify/mark.c b/fs/notify/mark.c
index d2dd16cb5989..99ddd126f6f0 100644
--- a/fs/notify/mark.c
+++ b/fs/notify/mark.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2, or (at your option)
- *  any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; see the file COPYING.  If not, write to
- *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /*
@@ -82,6 +69,7 @@
 #include <linux/slab.h>
 #include <linux/spinlock.h>
 #include <linux/srcu.h>
+#include <linux/ratelimit.h>
 
 #include <linux/atomic.h>
 
@@ -238,13 +226,13 @@ static void fsnotify_drop_object(unsigned int type, void *objp)
 
 void fsnotify_put_mark(struct fsnotify_mark *mark)
 {
-	struct fsnotify_mark_connector *conn;
+	struct fsnotify_mark_connector *conn = READ_ONCE(mark->connector);
 	void *objp = NULL;
 	unsigned int type = FSNOTIFY_OBJ_TYPE_DETACHED;
 	bool free_conn = false;
 
 	/* Catch marks that were actually never attached to object */
-	if (!mark->connector) {
+	if (!conn) {
 		if (refcount_dec_and_test(&mark->refcnt))
 			fsnotify_final_mark_destroy(mark);
 		return;
@@ -254,10 +242,9 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
 	 * We have to be careful so that traversals of obj_list under lock can
 	 * safely grab mark reference.
 	 */
-	if (!refcount_dec_and_lock(&mark->refcnt, &mark->connector->lock))
+	if (!refcount_dec_and_lock(&mark->refcnt, &conn->lock))
 		return;
 
-	conn = mark->connector;
 	hlist_del_init_rcu(&mark->obj_list);
 	if (hlist_empty(&conn->list)) {
 		objp = fsnotify_detach_connector_from_object(conn, &type);
@@ -265,7 +252,7 @@ void fsnotify_put_mark(struct fsnotify_mark *mark)
 	} else {
 		__fsnotify_recalc_mask(conn);
 	}
-	mark->connector = NULL;
+	WRITE_ONCE(mark->connector, NULL);
 	spin_unlock(&conn->lock);
 
 	fsnotify_drop_object(type, objp);
@@ -481,7 +468,8 @@ int fsnotify_compare_groups(struct fsnotify_group *a, struct fsnotify_group *b)
 }
 
 static int fsnotify_attach_connector_to_object(fsnotify_connp_t *connp,
-					       unsigned int type)
+					       unsigned int type,
+					       __kernel_fsid_t *fsid)
 {
 	struct inode *inode = NULL;
 	struct fsnotify_mark_connector *conn;
@@ -493,6 +481,14 @@ static int fsnotify_attach_connector_to_object(fsnotify_connp_t *connp,
 	INIT_HLIST_HEAD(&conn->list);
 	conn->type = type;
 	conn->obj = connp;
+	/* Cache fsid of filesystem containing the object */
+	if (fsid) {
+		conn->fsid = *fsid;
+		conn->flags = FSNOTIFY_CONN_FLAG_HAS_FSID;
+	} else {
+		conn->fsid.val[0] = conn->fsid.val[1] = 0;
+		conn->flags = 0;
+	}
 	if (conn->type == FSNOTIFY_OBJ_TYPE_INODE)
 		inode = igrab(fsnotify_conn_inode(conn));
 	/*
@@ -544,7 +540,7 @@ out:
  */
 static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
 				  fsnotify_connp_t *connp, unsigned int type,
-				  int allow_dups)
+				  int allow_dups, __kernel_fsid_t *fsid)
 {
 	struct fsnotify_mark *lmark, *last = NULL;
 	struct fsnotify_mark_connector *conn;
@@ -553,15 +549,41 @@ static int fsnotify_add_mark_list(struct fsnotify_mark *mark,
 
 	if (WARN_ON(!fsnotify_valid_obj_type(type)))
 		return -EINVAL;
+
+	/* Backend is expected to check for zero fsid (e.g. tmpfs) */
+	if (fsid && WARN_ON_ONCE(!fsid->val[0] && !fsid->val[1]))
+		return -ENODEV;
+
 restart:
 	spin_lock(&mark->lock);
 	conn = fsnotify_grab_connector(connp);
 	if (!conn) {
 		spin_unlock(&mark->lock);
-		err = fsnotify_attach_connector_to_object(connp, type);
+		err = fsnotify_attach_connector_to_object(connp, type, fsid);
 		if (err)
 			return err;
 		goto restart;
+	} else if (fsid && !(conn->flags & FSNOTIFY_CONN_FLAG_HAS_FSID)) {
+		conn->fsid = *fsid;
+		/* Pairs with smp_rmb() in fanotify_get_fsid() */
+		smp_wmb();
+		conn->flags |= FSNOTIFY_CONN_FLAG_HAS_FSID;
+	} else if (fsid && (conn->flags & FSNOTIFY_CONN_FLAG_HAS_FSID) &&
+		   (fsid->val[0] != conn->fsid.val[0] ||
+		    fsid->val[1] != conn->fsid.val[1])) {
+		/*
+		 * Backend is expected to check for non uniform fsid
+		 * (e.g. btrfs), but maybe we missed something?
+		 * Only allow setting conn->fsid once to non zero fsid.
+		 * inotify and non-fid fanotify groups do not set nor test
+		 * conn->fsid.
+		 */
+		pr_warn_ratelimited("%s: fsid mismatch on object of type %u: "
+				    "%x.%x != %x.%x\n", __func__, conn->type,
+				    fsid->val[0], fsid->val[1],
+				    conn->fsid.val[0], conn->fsid.val[1]);
+		err = -EXDEV;
+		goto out_err;
 	}
 
 	/* is mark the first mark? */
@@ -592,7 +614,12 @@ restart:
 	/* mark should be the last entry.  last is the current last entry */
 	hlist_add_behind_rcu(&mark->obj_list, &last->obj_list);
 added:
-	mark->connector = conn;
+	/*
+	 * Since connector is attached to object using cmpxchg() we are
+	 * guaranteed that connector initialization is fully visible by anyone
+	 * seeing mark->connector set.
+	 */
+	WRITE_ONCE(mark->connector, conn);
 out_err:
 	spin_unlock(&conn->lock);
 	spin_unlock(&mark->lock);
@@ -606,7 +633,7 @@ out_err:
  */
 int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
 			     fsnotify_connp_t *connp, unsigned int type,
-			     int allow_dups)
+			     int allow_dups, __kernel_fsid_t *fsid)
 {
 	struct fsnotify_group *group = mark->group;
 	int ret = 0;
@@ -627,7 +654,7 @@ int fsnotify_add_mark_locked(struct fsnotify_mark *mark,
 	fsnotify_get_mark(mark); /* for g_list */
 	spin_unlock(&mark->lock);
 
-	ret = fsnotify_add_mark_list(mark, connp, type, allow_dups);
+	ret = fsnotify_add_mark_list(mark, connp, type, allow_dups, fsid);
 	if (ret)
 		goto err;
 
@@ -648,13 +675,13 @@ err:
 }
 
 int fsnotify_add_mark(struct fsnotify_mark *mark, fsnotify_connp_t *connp,
-		      unsigned int type, int allow_dups)
+		      unsigned int type, int allow_dups, __kernel_fsid_t *fsid)
 {
 	int ret;
 	struct fsnotify_group *group = mark->group;
 
 	mutex_lock(&group->mark_mutex);
-	ret = fsnotify_add_mark_locked(mark, connp, type, allow_dups);
+	ret = fsnotify_add_mark_locked(mark, connp, type, allow_dups, fsid);
 	mutex_unlock(&group->mark_mutex);
 	return ret;
 }
@@ -780,6 +807,7 @@ void fsnotify_init_mark(struct fsnotify_mark *mark,
 	refcount_set(&mark->refcnt, 1);
 	fsnotify_get_group(group);
 	mark->group = group;
+	WRITE_ONCE(mark->connector, NULL);
 }
 
 /*
diff --git a/fs/notify/notification.c b/fs/notify/notification.c
index 3c3e36745f59..75d79d6d3ef0 100644
--- a/fs/notify/notification.c
+++ b/fs/notify/notification.c
@@ -1,19 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  *  Copyright (C) 2008 Red Hat, Inc., Eric Paris <eparis@redhat.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License as published by
- *  the Free Software Foundation; either version 2, or (at your option)
- *  any later version.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; see the file COPYING.  If not, write to
- *  the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
  */
 
 /*
@@ -71,7 +58,7 @@ void fsnotify_destroy_event(struct fsnotify_group *group,
 			    struct fsnotify_event *event)
 {
 	/* Overflow events are per-group and we don't want to free them */
-	if (!event || event->mask == FS_Q_OVERFLOW)
+	if (!event || event == group->overflow_event)
 		return;
 	/*
 	 * If the event is still queued, we have a problem... Do an unreliable
@@ -141,6 +128,18 @@ queue:
 	return ret;
 }
 
+void fsnotify_remove_queued_event(struct fsnotify_group *group,
+				  struct fsnotify_event *event)
+{
+	assert_spin_locked(&group->notification_lock);
+	/*
+	 * We need to init list head for the case of overflow event so that
+	 * check in fsnotify_add_event() works
+	 */
+	list_del_init(&event->list);
+	group->q_len--;
+}
+
 /*
  * Remove and return the first event from the notification list.  It is the
  * responsibility of the caller to destroy the obtained event
@@ -155,13 +154,7 @@ struct fsnotify_event *fsnotify_remove_first_event(struct fsnotify_group *group)
 
 	event = list_first_entry(&group->notification_list,
 				 struct fsnotify_event, list);
-	/*
-	 * We need to init list head for the case of overflow event so that
-	 * check in fsnotify_add_event() works
-	 */
-	list_del_init(&event->list);
-	group->q_len--;
-
+	fsnotify_remove_queued_event(group, event);
 	return event;
 }
 
@@ -194,23 +187,3 @@ void fsnotify_flush_notify(struct fsnotify_group *group)
 	}
 	spin_unlock(&group->notification_lock);
 }
-
-/*
- * fsnotify_create_event - Allocate a new event which will be sent to each
- * group's handle_event function if the group was interested in this
- * particular event.
- *
- * @inode the inode which is supposed to receive the event (sometimes a
- *	parent of the inode to which the event happened.
- * @mask what actually happened.
- * @data pointer to the object which was actually affected
- * @data_type flag indication if the data is a file, path, inode, nothing...
- * @name the filename, if available
- */
-void fsnotify_init_event(struct fsnotify_event *event, struct inode *inode,
-			 u32 mask)
-{
-	INIT_LIST_HEAD(&event->list);
-	event->inode = inode;
-	event->mask = mask;
-}
diff --git a/fs/nsfs.c b/fs/nsfs.c
index 60702d677bd4..e3bf08c5af41 100644
--- a/fs/nsfs.c
+++ b/fs/nsfs.c
@@ -85,13 +85,12 @@ slow:
 	inode->i_fop = &ns_file_operations;
 	inode->i_private = ns;
 
-	dentry = d_alloc_pseudo(mnt->mnt_sb, &empty_name);
+	dentry = d_alloc_anon(mnt->mnt_sb);
 	if (!dentry) {
 		iput(inode);
 		return ERR_PTR(-ENOMEM);
 	}
 	d_instantiate(dentry, inode);
-	dentry->d_flags |= DCACHE_RCUACCESS;
 	dentry->d_fsdata = (void *)ns->ops;
 	d = atomic_long_cmpxchg(&ns->stashed, 0, (unsigned long)dentry);
 	if (d) {
@@ -106,17 +105,16 @@ slow:
 void *ns_get_path_cb(struct path *path, ns_get_path_helper_t *ns_get_cb,
 		     void *private_data)
 {
-	struct ns_common *ns;
 	void *ret;
 
-again:
-	ns = ns_get_cb(private_data);
-	if (!ns)
-		return ERR_PTR(-ENOENT);
+	do {
+		struct ns_common *ns = ns_get_cb(private_data);
+		if (!ns)
+			return ERR_PTR(-ENOENT);
+
+		ret = __ns_get_path(path, ns);
+	} while (ret == ERR_PTR(-EAGAIN));
 
-	ret = __ns_get_path(path, ns);
-	if (IS_ERR(ret) && PTR_ERR(ret) == -EAGAIN)
-		goto again;
 	return ret;
 }
 
@@ -155,7 +153,7 @@ int open_related_ns(struct ns_common *ns,
 	if (fd < 0)
 		return fd;
 
-	while (1) {
+	do {
 		struct ns_common *relative;
 
 		relative = get_ns(ns);
@@ -165,10 +163,8 @@ int open_related_ns(struct ns_common *ns,
 		}
 
 		err = __ns_get_path(&path, relative);
-		if (IS_ERR(err) && PTR_ERR(err) == -EAGAIN)
-			continue;
-		break;
-	}
+	} while (err == ERR_PTR(-EAGAIN));
+
 	if (IS_ERR(err)) {
 		put_unused_fd(fd);
 		return PTR_ERR(err);
diff --git a/fs/ntfs/Kconfig b/fs/ntfs/Kconfig
index f5a868cc9152..de9fb5cff226 100644
--- a/fs/ntfs/Kconfig
+++ b/fs/ntfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config NTFS_FS
 	tristate "NTFS file system support"
 	select NLS
diff --git a/fs/ntfs/aops.c b/fs/ntfs/aops.c
index 8946130c87ad..7202a1e39d70 100644
--- a/fs/ntfs/aops.c
+++ b/fs/ntfs/aops.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * aops.c - NTFS kernel address space operations and page cache handling.
  *
  * Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/errno.h>
diff --git a/fs/ntfs/aops.h b/fs/ntfs/aops.h
index 820d6eabf60f..f0962d46bd67 100644
--- a/fs/ntfs/aops.h
+++ b/fs/ntfs/aops.h
@@ -1,24 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /**
  * aops.h - Defines for NTFS kernel address space operations and page cache
  *	    handling.  Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2004 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_AOPS_H
diff --git a/fs/ntfs/attrib.c b/fs/ntfs/attrib.c
index 44a39a099b54..d563abc3e136 100644
--- a/fs/ntfs/attrib.c
+++ b/fs/ntfs/attrib.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * attrib.c - NTFS attribute operations.  Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2012 Anton Altaparmakov and Tuxera Inc.
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/buffer_head.h>
diff --git a/fs/ntfs/attrib.h b/fs/ntfs/attrib.h
index 3c8b74c99b80..fe0890d3d072 100644
--- a/fs/ntfs/attrib.h
+++ b/fs/ntfs/attrib.h
@@ -1,24 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * attrib.h - Defines for attribute handling in NTFS Linux kernel driver.
  *	      Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2005 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_ATTRIB_H
diff --git a/fs/ntfs/bitmap.c b/fs/ntfs/bitmap.c
index ec130c588d2b..0675b2400873 100644
--- a/fs/ntfs/bitmap.c
+++ b/fs/ntfs/bitmap.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * bitmap.c - NTFS kernel bitmap handling.  Part of the Linux-NTFS project.
  *
  * Copyright (c) 2004-2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifdef NTFS_RW
diff --git a/fs/ntfs/bitmap.h b/fs/ntfs/bitmap.h
index 72c9ad8be70d..9dd2224ca9c4 100644
--- a/fs/ntfs/bitmap.h
+++ b/fs/ntfs/bitmap.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * bitmap.h - Defines for NTFS kernel bitmap handling.  Part of the Linux-NTFS
  *	      project.
  *
  * Copyright (c) 2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_BITMAP_H
diff --git a/fs/ntfs/collate.c b/fs/ntfs/collate.c
index 4a28ab3898ef..3ab6ec96abfe 100644
--- a/fs/ntfs/collate.c
+++ b/fs/ntfs/collate.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * collate.c - NTFS kernel collation handling.  Part of the Linux-NTFS project.
  *
  * Copyright (c) 2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include "collate.h"
diff --git a/fs/ntfs/collate.h b/fs/ntfs/collate.h
index aba83347e5fe..f2255619b4f4 100644
--- a/fs/ntfs/collate.h
+++ b/fs/ntfs/collate.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * collate.h - Defines for NTFS kernel collation handling.  Part of the
  *	       Linux-NTFS project.
  *
  * Copyright (c) 2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_COLLATE_H
diff --git a/fs/ntfs/compress.c b/fs/ntfs/compress.c
index df7c32b5fac7..d2f9d6a0ee32 100644
--- a/fs/ntfs/compress.c
+++ b/fs/ntfs/compress.c
@@ -1,24 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * compress.c - NTFS kernel compressed attributes handling.
  *		Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2004 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/fs.h>
diff --git a/fs/ntfs/debug.c b/fs/ntfs/debug.c
index 825a54e8f490..a3c1c5656f8f 100644
--- a/fs/ntfs/debug.c
+++ b/fs/ntfs/debug.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * debug.c - NTFS kernel debug support. Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 #include "debug.h"
diff --git a/fs/ntfs/debug.h b/fs/ntfs/debug.h
index 61bf091e32a8..6fdef388f129 100644
--- a/fs/ntfs/debug.h
+++ b/fs/ntfs/debug.h
@@ -1,22 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * debug.h - NTFS kernel debug support. Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_DEBUG_H
diff --git a/fs/ntfs/dir.c b/fs/ntfs/dir.c
index 1a24be9e8405..3c4811469ae8 100644
--- a/fs/ntfs/dir.c
+++ b/fs/ntfs/dir.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * dir.c - NTFS kernel directory operations. Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2007 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/buffer_head.h>
diff --git a/fs/ntfs/dir.h b/fs/ntfs/dir.h
index aea7582d561f..0e326753df40 100644
--- a/fs/ntfs/dir.h
+++ b/fs/ntfs/dir.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * dir.h - Defines for directory handling in NTFS Linux kernel driver. Part of
  *	   the Linux-NTFS project.
  *
  * Copyright (c) 2002-2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_DIR_H
diff --git a/fs/ntfs/endian.h b/fs/ntfs/endian.h
index 927b5bf04b4f..f30c139bf9ae 100644
--- a/fs/ntfs/endian.h
+++ b/fs/ntfs/endian.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * endian.h - Defines for endianness handling in NTFS Linux kernel driver.
  *	      Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_ENDIAN_H
diff --git a/fs/ntfs/file.c b/fs/ntfs/file.c
index 331910fa8442..f42967b738eb 100644
--- a/fs/ntfs/file.c
+++ b/fs/ntfs/file.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * file.c - NTFS kernel file operations.  Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2015 Anton Altaparmakov and Tuxera Inc.
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/backing-dev.h>
diff --git a/fs/ntfs/index.c b/fs/ntfs/index.c
index 0d645f357930..d46c2c03a032 100644
--- a/fs/ntfs/index.c
+++ b/fs/ntfs/index.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * index.c - NTFS kernel index handling.  Part of the Linux-NTFS project.
  *
  * Copyright (c) 2004-2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/slab.h>
diff --git a/fs/ntfs/index.h b/fs/ntfs/index.h
index 8745469c3989..bb3c3ae55138 100644
--- a/fs/ntfs/index.h
+++ b/fs/ntfs/index.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * index.h - Defines for NTFS kernel index handling.  Part of the Linux-NTFS
  *	     project.
  *
  * Copyright (c) 2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_INDEX_H
diff --git a/fs/ntfs/inode.c b/fs/ntfs/inode.c
index bd3221cbdd95..8baa34baf548 100644
--- a/fs/ntfs/inode.c
+++ b/fs/ntfs/inode.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * inode.c - NTFS kernel inode handling.
  *
  * Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/buffer_head.h>
@@ -332,23 +318,11 @@ struct inode *ntfs_alloc_big_inode(struct super_block *sb)
 	return NULL;
 }
 
-static void ntfs_i_callback(struct rcu_head *head)
+void ntfs_free_big_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(ntfs_big_inode_cache, NTFS_I(inode));
 }
 
-void ntfs_destroy_big_inode(struct inode *inode)
-{
-	ntfs_inode *ni = NTFS_I(inode);
-
-	ntfs_debug("Entering.");
-	BUG_ON(ni->page);
-	if (!atomic_dec_and_test(&ni->count))
-		BUG();
-	call_rcu(&inode->i_rcu, ntfs_i_callback);
-}
-
 static inline ntfs_inode *ntfs_alloc_extent_inode(void)
 {
 	ntfs_inode *ni;
@@ -2287,6 +2261,9 @@ void ntfs_evict_big_inode(struct inode *vi)
 			ni->ext.base_ntfs_ino = NULL;
 		}
 	}
+	BUG_ON(ni->page);
+	if (!atomic_dec_and_test(&ni->count))
+		BUG();
 	return;
 }
 
diff --git a/fs/ntfs/inode.h b/fs/ntfs/inode.h
index b3c3469de6cb..98e670fbdd31 100644
--- a/fs/ntfs/inode.h
+++ b/fs/ntfs/inode.h
@@ -1,24 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * inode.h - Defines for inode structures NTFS Linux kernel driver. Part of
  *	     the Linux-NTFS project.
  *
  * Copyright (c) 2001-2007 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_INODE_H
@@ -278,7 +264,7 @@ extern struct inode *ntfs_index_iget(struct inode *base_vi, ntfschar *name,
 		u32 name_len);
 
 extern struct inode *ntfs_alloc_big_inode(struct super_block *sb);
-extern void ntfs_destroy_big_inode(struct inode *inode);
+extern void ntfs_free_big_inode(struct inode *inode);
 extern void ntfs_evict_big_inode(struct inode *vi);
 
 extern void __ntfs_init_inode(struct super_block *sb, ntfs_inode *ni);
diff --git a/fs/ntfs/layout.h b/fs/ntfs/layout.h
index 809c0e6d8e09..85422761ff43 100644
--- a/fs/ntfs/layout.h
+++ b/fs/ntfs/layout.h
@@ -1,24 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * layout.h - All NTFS associated on-disk structures. Part of the Linux-NTFS
  *	      project.
  *
  * Copyright (c) 2001-2005 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_LAYOUT_H
diff --git a/fs/ntfs/lcnalloc.c b/fs/ntfs/lcnalloc.c
index 27a24a42f712..eda9972e6159 100644
--- a/fs/ntfs/lcnalloc.c
+++ b/fs/ntfs/lcnalloc.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * lcnalloc.c - Cluster (de)allocation code.  Part of the Linux-NTFS project.
  *
  * Copyright (c) 2004-2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifdef NTFS_RW
diff --git a/fs/ntfs/lcnalloc.h b/fs/ntfs/lcnalloc.h
index 2adb04316941..1589a6d8434b 100644
--- a/fs/ntfs/lcnalloc.h
+++ b/fs/ntfs/lcnalloc.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * lcnalloc.h - Exports for NTFS kernel cluster (de)allocation.  Part of the
  *		Linux-NTFS project.
  *
  * Copyright (c) 2004-2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_LCNALLOC_H
diff --git a/fs/ntfs/logfile.c b/fs/ntfs/logfile.c
index 353379ff6057..a0c40f1be7ac 100644
--- a/fs/ntfs/logfile.c
+++ b/fs/ntfs/logfile.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * logfile.c - NTFS kernel journal handling. Part of the Linux-NTFS project.
  *
  * Copyright (c) 2002-2007 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifdef NTFS_RW
diff --git a/fs/ntfs/logfile.h b/fs/ntfs/logfile.h
index aa2b6ac3f0a4..429d4909cc72 100644
--- a/fs/ntfs/logfile.h
+++ b/fs/ntfs/logfile.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * logfile.h - Defines for NTFS kernel journal ($LogFile) handling.  Part of
  *	       the Linux-NTFS project.
  *
  * Copyright (c) 2000-2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_LOGFILE_H
diff --git a/fs/ntfs/malloc.h b/fs/ntfs/malloc.h
index 5becc8acc8f4..842b0bfc3ac9 100644
--- a/fs/ntfs/malloc.h
+++ b/fs/ntfs/malloc.h
@@ -1,22 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * malloc.h - NTFS kernel memory handling. Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_MALLOC_H
diff --git a/fs/ntfs/mft.c b/fs/ntfs/mft.c
index fb14d17666c8..20c841a906f2 100644
--- a/fs/ntfs/mft.c
+++ b/fs/ntfs/mft.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * mft.c - NTFS kernel mft record operations. Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2012 Anton Altaparmakov and Tuxera Inc.
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/buffer_head.h>
diff --git a/fs/ntfs/mft.h b/fs/ntfs/mft.h
index b52bf87b99de..17bfefc30271 100644
--- a/fs/ntfs/mft.h
+++ b/fs/ntfs/mft.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * mft.h - Defines for mft record handling in NTFS Linux kernel driver.
  *	   Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_MFT_H
diff --git a/fs/ntfs/mst.c b/fs/ntfs/mst.c
index 5a858d839b65..16b3c884abfc 100644
--- a/fs/ntfs/mst.c
+++ b/fs/ntfs/mst.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * mst.c - NTFS multi sector transfer protection handling code. Part of the
  *	   Linux-NTFS project.
  *
  * Copyright (c) 2001-2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include "ntfs.h"
diff --git a/fs/ntfs/namei.c b/fs/ntfs/namei.c
index 3986c7a1f6a8..2d3cc9e3395d 100644
--- a/fs/ntfs/namei.c
+++ b/fs/ntfs/namei.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * namei.c - NTFS kernel directory inode operations. Part of the Linux-NTFS
  *	     project.
  *
  * Copyright (c) 2001-2006 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/dcache.h>
diff --git a/fs/ntfs/ntfs.h b/fs/ntfs/ntfs.h
index 12de47b96ca9..e81376ea9152 100644
--- a/fs/ntfs/ntfs.h
+++ b/fs/ntfs/ntfs.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * ntfs.h - Defines for NTFS Linux kernel driver.
  *
  * Copyright (c) 2001-2014 Anton Altaparmakov and Tuxera Inc.
  * Copyright (C) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_H
diff --git a/fs/ntfs/quota.c b/fs/ntfs/quota.c
index 9793e68ba1dd..9160480222fd 100644
--- a/fs/ntfs/quota.c
+++ b/fs/ntfs/quota.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * quota.c - NTFS kernel quota ($Quota) handling.  Part of the Linux-NTFS
  *	     project.
  *
  * Copyright (c) 2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifdef NTFS_RW
diff --git a/fs/ntfs/quota.h b/fs/ntfs/quota.h
index 4cbe5594c0b0..fe3132a3d6d2 100644
--- a/fs/ntfs/quota.h
+++ b/fs/ntfs/quota.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * quota.h - Defines for NTFS kernel quota ($Quota) handling.  Part of the
  *	     Linux-NTFS project.
  *
  * Copyright (c) 2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_QUOTA_H
diff --git a/fs/ntfs/runlist.c b/fs/ntfs/runlist.c
index eac7d6788a10..508744a93180 100644
--- a/fs/ntfs/runlist.c
+++ b/fs/ntfs/runlist.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /**
  * runlist.c - NTFS runlist handling code.  Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2007 Anton Altaparmakov
  * Copyright (c) 2002-2005 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include "debug.h"
diff --git a/fs/ntfs/runlist.h b/fs/ntfs/runlist.h
index 47728fbb610b..38de0a375f59 100644
--- a/fs/ntfs/runlist.h
+++ b/fs/ntfs/runlist.h
@@ -1,24 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * runlist.h - Defines for runlist handling in NTFS Linux kernel driver.
  *	       Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2005 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_RUNLIST_H
diff --git a/fs/ntfs/super.c b/fs/ntfs/super.c
index bb7159f697f2..29621d40f448 100644
--- a/fs/ntfs/super.c
+++ b/fs/ntfs/super.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * super.c - NTFS kernel super block handling. Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2012 Anton Altaparmakov and Tuxera Inc.
  * Copyright (c) 2001,2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
 
@@ -2676,7 +2662,7 @@ static int ntfs_write_inode(struct inode *vi, struct writeback_control *wbc)
  */
 static const struct super_operations ntfs_sops = {
 	.alloc_inode	= ntfs_alloc_big_inode,	  /* VFS: Allocate new inode. */
-	.destroy_inode	= ntfs_destroy_big_inode, /* VFS: Deallocate inode. */
+	.free_inode	= ntfs_free_big_inode, /* VFS: Deallocate inode. */
 #ifdef NTFS_RW
 	.write_inode	= ntfs_write_inode,	/* VFS: Write dirty inode to
 						   disk. */
diff --git a/fs/ntfs/sysctl.c b/fs/ntfs/sysctl.c
index a503156ec15f..a030d00af90c 100644
--- a/fs/ntfs/sysctl.c
+++ b/fs/ntfs/sysctl.c
@@ -1,24 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * sysctl.c - Code for sysctl handling in NTFS Linux kernel driver. Part of
  *	      the Linux-NTFS project. Adapted from the old NTFS driver,
  *	      Copyright (C) 1997 Martin von Löwis, Régis Duchesne
  *
  * Copyright (c) 2002-2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifdef DEBUG
diff --git a/fs/ntfs/sysctl.h b/fs/ntfs/sysctl.h
index d4f8ce920d95..96bb2299d2d5 100644
--- a/fs/ntfs/sysctl.h
+++ b/fs/ntfs/sysctl.h
@@ -1,24 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * sysctl.h - Defines for sysctl handling in NTFS Linux kernel driver. Part of
  *	      the Linux-NTFS project. Adapted from the old NTFS driver,
  *	      Copyright (C) 1997 Martin von Löwis, Régis Duchesne
  *
  * Copyright (c) 2002-2004 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_SYSCTL_H
diff --git a/fs/ntfs/time.h b/fs/ntfs/time.h
index 24cd719f1fd2..6b63261300cc 100644
--- a/fs/ntfs/time.h
+++ b/fs/ntfs/time.h
@@ -1,22 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * time.h - NTFS time conversion functions.  Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_TIME_H
diff --git a/fs/ntfs/types.h b/fs/ntfs/types.h
index 8c8053b66984..9a47859e7a06 100644
--- a/fs/ntfs/types.h
+++ b/fs/ntfs/types.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * types.h - Defines for NTFS Linux kernel driver specific types.
  *	     Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_TYPES_H
diff --git a/fs/ntfs/unistr.c b/fs/ntfs/unistr.c
index 005ca4b0f132..a6b6c64f14a9 100644
--- a/fs/ntfs/unistr.c
+++ b/fs/ntfs/unistr.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * unistr.c - NTFS Unicode string handling. Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2006 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/slab.h>
diff --git a/fs/ntfs/upcase.c b/fs/ntfs/upcase.c
index e2f72ca98037..4ebe84a78dea 100644
--- a/fs/ntfs/upcase.c
+++ b/fs/ntfs/upcase.c
@@ -1,24 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * upcase.c - Generate the full NTFS Unicode upcase table in little endian.
  *	      Part of the Linux-NTFS project.
  *
  * Copyright (c) 2001 Richard Russon <ntfs@flatcap.org>
  * Copyright (c) 2001-2006 Anton Altaparmakov
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS source
- * in the file COPYING); if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include "malloc.h"
diff --git a/fs/ntfs/usnjrnl.c b/fs/ntfs/usnjrnl.c
index b2bc0d55b036..9097a0b4ef25 100644
--- a/fs/ntfs/usnjrnl.c
+++ b/fs/ntfs/usnjrnl.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * usnjrnl.h - NTFS kernel transaction log ($UsnJrnl) handling.  Part of the
  *	       Linux-NTFS project.
  *
  * Copyright (c) 2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifdef NTFS_RW
diff --git a/fs/ntfs/usnjrnl.h b/fs/ntfs/usnjrnl.h
index 00d8e6bd7c36..85f531b59395 100644
--- a/fs/ntfs/usnjrnl.h
+++ b/fs/ntfs/usnjrnl.h
@@ -1,23 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * usnjrnl.h - Defines for NTFS kernel transaction log ($UsnJrnl) handling.
  *	       Part of the Linux-NTFS project.
  *
  * Copyright (c) 2005 Anton Altaparmakov
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_USNJRNL_H
diff --git a/fs/ntfs/volume.h b/fs/ntfs/volume.h
index 4f579b02bc76..930a9ae8a053 100644
--- a/fs/ntfs/volume.h
+++ b/fs/ntfs/volume.h
@@ -1,24 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * volume.h - Defines for volume structures in NTFS Linux kernel driver. Part
  *	      of the Linux-NTFS project.
  *
  * Copyright (c) 2001-2006 Anton Altaparmakov
  * Copyright (c) 2002 Richard Russon
- *
- * This program/include file is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License as published
- * by the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program/include file is distributed in the hope that it will be
- * useful, but WITHOUT ANY WARRANTY; without even the implied warranty
- * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program (in the main directory of the Linux-NTFS
- * distribution in the file COPYING); if not, write to the Free Software
- * Foundation,Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #ifndef _LINUX_NTFS_VOLUME_H
diff --git a/fs/ocfs2/Kconfig b/fs/ocfs2/Kconfig
index 77a8de5f7119..46bba20da6b5 100644
--- a/fs/ocfs2/Kconfig
+++ b/fs/ocfs2/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config OCFS2_FS
 	tristate "OCFS2 file system support"
 	depends on NET && SYSFS && CONFIGFS_FS
diff --git a/fs/ocfs2/acl.c b/fs/ocfs2/acl.c
index 917fadca8a7b..3e7da392aa6f 100644
--- a/fs/ocfs2/acl.c
+++ b/fs/ocfs2/acl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -8,15 +9,6 @@
  * CREDITS:
  * Lots of code in this file is copy from linux/fs/ext3/acl.c.
  * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/init.h>
diff --git a/fs/ocfs2/acl.h b/fs/ocfs2/acl.h
index 7be0bb756286..127b13432146 100644
--- a/fs/ocfs2/acl.h
+++ b/fs/ocfs2/acl.h
@@ -1,18 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * acl.h
  *
  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #ifndef OCFS2_ACL_H
diff --git a/fs/ocfs2/alloc.c b/fs/ocfs2/alloc.c
index d1cbb27808e2..0c335b51043d 100644
--- a/fs/ocfs2/alloc.c
+++ b/fs/ocfs2/alloc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Extent allocs and frees
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
@@ -6205,17 +6191,17 @@ int ocfs2_begin_truncate_log_recovery(struct ocfs2_super *osb,
 	if (le16_to_cpu(tl->tl_used)) {
 		trace_ocfs2_truncate_log_recovery_num(le16_to_cpu(tl->tl_used));
 
-		*tl_copy = kmalloc(tl_bh->b_size, GFP_KERNEL);
+		/*
+		 * Assuming the write-out below goes well, this copy will be
+		 * passed back to recovery for processing.
+		 */
+		*tl_copy = kmemdup(tl_bh->b_data, tl_bh->b_size, GFP_KERNEL);
 		if (!(*tl_copy)) {
 			status = -ENOMEM;
 			mlog_errno(status);
 			goto bail;
 		}
 
-		/* Assuming the write-out below goes well, this copy
-		 * will be passed back to recovery for processing. */
-		memcpy(*tl_copy, tl_bh->b_data, tl_bh->b_size);
-
 		/* All we need to do to clear the truncate log is set
 		 * tl_used. */
 		tl->tl_used = 0;
@@ -7532,10 +7518,11 @@ static int ocfs2_trim_group(struct super_block *sb,
 	return count;
 }
 
-int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
+static
+int ocfs2_trim_mainbm(struct super_block *sb, struct fstrim_range *range)
 {
 	struct ocfs2_super *osb = OCFS2_SB(sb);
-	u64 start, len, trimmed, first_group, last_group, group;
+	u64 start, len, trimmed = 0, first_group, last_group = 0, group = 0;
 	int ret, cnt;
 	u32 first_bit, last_bit, minlen;
 	struct buffer_head *main_bm_bh = NULL;
@@ -7543,7 +7530,6 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
 	struct buffer_head *gd_bh = NULL;
 	struct ocfs2_dinode *main_bm;
 	struct ocfs2_group_desc *gd = NULL;
-	struct ocfs2_trim_fs_info info, *pinfo = NULL;
 
 	start = range->start >> osb->s_clustersize_bits;
 	len = range->len >> osb->s_clustersize_bits;
@@ -7552,6 +7538,9 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
 	if (minlen >= osb->bitmap_cpg || range->len < sb->s_blocksize)
 		return -EINVAL;
 
+	trace_ocfs2_trim_mainbm(start, len, minlen);
+
+next_group:
 	main_bm_inode = ocfs2_get_system_file_inode(osb,
 						    GLOBAL_BITMAP_SYSTEM_INODE,
 						    OCFS2_INVALID_SLOT);
@@ -7570,64 +7559,34 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
 	}
 	main_bm = (struct ocfs2_dinode *)main_bm_bh->b_data;
 
-	if (start >= le32_to_cpu(main_bm->i_clusters)) {
-		ret = -EINVAL;
-		goto out_unlock;
-	}
-
-	len = range->len >> osb->s_clustersize_bits;
-	if (start + len > le32_to_cpu(main_bm->i_clusters))
-		len = le32_to_cpu(main_bm->i_clusters) - start;
-
-	trace_ocfs2_trim_fs(start, len, minlen);
-
-	ocfs2_trim_fs_lock_res_init(osb);
-	ret = ocfs2_trim_fs_lock(osb, NULL, 1);
-	if (ret < 0) {
-		if (ret != -EAGAIN) {
-			mlog_errno(ret);
-			ocfs2_trim_fs_lock_res_uninit(osb);
+	/*
+	 * Do some check before trim the first group.
+	 */
+	if (!group) {
+		if (start >= le32_to_cpu(main_bm->i_clusters)) {
+			ret = -EINVAL;
 			goto out_unlock;
 		}
 
-		mlog(ML_NOTICE, "Wait for trim on device (%s) to "
-		     "finish, which is running from another node.\n",
-		     osb->dev_str);
-		ret = ocfs2_trim_fs_lock(osb, &info, 0);
-		if (ret < 0) {
-			mlog_errno(ret);
-			ocfs2_trim_fs_lock_res_uninit(osb);
-			goto out_unlock;
-		}
+		if (start + len > le32_to_cpu(main_bm->i_clusters))
+			len = le32_to_cpu(main_bm->i_clusters) - start;
 
-		if (info.tf_valid && info.tf_success &&
-		    info.tf_start == start && info.tf_len == len &&
-		    info.tf_minlen == minlen) {
-			/* Avoid sending duplicated trim to a shared device */
-			mlog(ML_NOTICE, "The same trim on device (%s) was "
-			     "just done from node (%u), return.\n",
-			     osb->dev_str, info.tf_nodenum);
-			range->len = info.tf_trimlen;
-			goto out_trimunlock;
-		}
+		/*
+		 * Determine first and last group to examine based on
+		 * start and len
+		 */
+		first_group = ocfs2_which_cluster_group(main_bm_inode, start);
+		if (first_group == osb->first_cluster_group_blkno)
+			first_bit = start;
+		else
+			first_bit = start - ocfs2_blocks_to_clusters(sb,
+								first_group);
+		last_group = ocfs2_which_cluster_group(main_bm_inode,
+						       start + len - 1);
+		group = first_group;
 	}
 
-	info.tf_nodenum = osb->node_num;
-	info.tf_start = start;
-	info.tf_len = len;
-	info.tf_minlen = minlen;
-
-	/* Determine first and last group to examine based on start and len */
-	first_group = ocfs2_which_cluster_group(main_bm_inode, start);
-	if (first_group == osb->first_cluster_group_blkno)
-		first_bit = start;
-	else
-		first_bit = start - ocfs2_blocks_to_clusters(sb, first_group);
-	last_group = ocfs2_which_cluster_group(main_bm_inode, start + len - 1);
-	last_bit = osb->bitmap_cpg;
-
-	trimmed = 0;
-	for (group = first_group; group <= last_group;) {
+	do {
 		if (first_bit + len >= osb->bitmap_cpg)
 			last_bit = osb->bitmap_cpg;
 		else
@@ -7659,21 +7618,81 @@ int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
 			group = ocfs2_clusters_to_blocks(sb, osb->bitmap_cpg);
 		else
 			group += ocfs2_clusters_to_blocks(sb, osb->bitmap_cpg);
-	}
-	range->len = trimmed * sb->s_blocksize;
+	} while (0);
 
-	info.tf_trimlen = range->len;
-	info.tf_success = (ret ? 0 : 1);
-	pinfo = &info;
-out_trimunlock:
-	ocfs2_trim_fs_unlock(osb, pinfo);
-	ocfs2_trim_fs_lock_res_uninit(osb);
 out_unlock:
 	ocfs2_inode_unlock(main_bm_inode, 0);
 	brelse(main_bm_bh);
+	main_bm_bh = NULL;
 out_mutex:
 	inode_unlock(main_bm_inode);
 	iput(main_bm_inode);
+
+	/*
+	 * If all the groups trim are not done or failed, but we should release
+	 * main_bm related locks for avoiding the current IO starve, then go to
+	 * trim the next group
+	 */
+	if (ret >= 0 && group <= last_group)
+		goto next_group;
+out:
+	range->len = trimmed * sb->s_blocksize;
+	return ret;
+}
+
+int ocfs2_trim_fs(struct super_block *sb, struct fstrim_range *range)
+{
+	int ret;
+	struct ocfs2_super *osb = OCFS2_SB(sb);
+	struct ocfs2_trim_fs_info info, *pinfo = NULL;
+
+	ocfs2_trim_fs_lock_res_init(osb);
+
+	trace_ocfs2_trim_fs(range->start, range->len, range->minlen);
+
+	ret = ocfs2_trim_fs_lock(osb, NULL, 1);
+	if (ret < 0) {
+		if (ret != -EAGAIN) {
+			mlog_errno(ret);
+			ocfs2_trim_fs_lock_res_uninit(osb);
+			return ret;
+		}
+
+		mlog(ML_NOTICE, "Wait for trim on device (%s) to "
+		     "finish, which is running from another node.\n",
+		     osb->dev_str);
+		ret = ocfs2_trim_fs_lock(osb, &info, 0);
+		if (ret < 0) {
+			mlog_errno(ret);
+			ocfs2_trim_fs_lock_res_uninit(osb);
+			return ret;
+		}
+
+		if (info.tf_valid && info.tf_success &&
+		    info.tf_start == range->start &&
+		    info.tf_len == range->len &&
+		    info.tf_minlen == range->minlen) {
+			/* Avoid sending duplicated trim to a shared device */
+			mlog(ML_NOTICE, "The same trim on device (%s) was "
+			     "just done from node (%u), return.\n",
+			     osb->dev_str, info.tf_nodenum);
+			range->len = info.tf_trimlen;
+			goto out;
+		}
+	}
+
+	info.tf_nodenum = osb->node_num;
+	info.tf_start = range->start;
+	info.tf_len = range->len;
+	info.tf_minlen = range->minlen;
+
+	ret = ocfs2_trim_mainbm(sb, range);
+
+	info.tf_trimlen = range->len;
+	info.tf_success = (ret < 0 ? 0 : 1);
+	pinfo = &info;
 out:
+	ocfs2_trim_fs_unlock(osb, pinfo);
+	ocfs2_trim_fs_lock_res_uninit(osb);
 	return ret;
 }
diff --git a/fs/ocfs2/alloc.h b/fs/ocfs2/alloc.h
index 250bcacdf9e9..7f973dd76dbc 100644
--- a/fs/ocfs2/alloc.h
+++ b/fs/ocfs2/alloc.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_ALLOC_H
diff --git a/fs/ocfs2/aops.c b/fs/ocfs2/aops.c
index 832c1759a09a..a4c905d6b575 100644
--- a/fs/ocfs2/aops.c
+++ b/fs/ocfs2/aops.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/aops.h b/fs/ocfs2/aops.h
index 3494a62ed749..70ed4382750d 100644
--- a/fs/ocfs2/aops.h
+++ b/fs/ocfs2/aops.h
@@ -1,22 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2002, 2004, 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_AOPS_H
diff --git a/fs/ocfs2/blockcheck.c b/fs/ocfs2/blockcheck.c
index 0725e6054650..429e6a8359a5 100644
--- a/fs/ocfs2/blockcheck.c
+++ b/fs/ocfs2/blockcheck.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Checksum and ECC codes for the OCFS2 userspace library.
  *
  * Copyright (C) 2006, 2008 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License, version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/kernel.h>
@@ -250,57 +242,29 @@ static struct dentry *blockcheck_debugfs_create(const char *name,
 static void ocfs2_blockcheck_debug_remove(struct ocfs2_blockcheck_stats *stats)
 {
 	if (stats) {
-		debugfs_remove(stats->b_debug_check);
-		stats->b_debug_check = NULL;
-		debugfs_remove(stats->b_debug_failure);
-		stats->b_debug_failure = NULL;
-		debugfs_remove(stats->b_debug_recover);
-		stats->b_debug_recover = NULL;
-		debugfs_remove(stats->b_debug_dir);
+		debugfs_remove_recursive(stats->b_debug_dir);
 		stats->b_debug_dir = NULL;
 	}
 }
 
-static int ocfs2_blockcheck_debug_install(struct ocfs2_blockcheck_stats *stats,
-					  struct dentry *parent)
+static void ocfs2_blockcheck_debug_install(struct ocfs2_blockcheck_stats *stats,
+					   struct dentry *parent)
 {
-	int rc = -EINVAL;
-
-	if (!stats)
-		goto out;
-
 	stats->b_debug_dir = debugfs_create_dir("blockcheck", parent);
-	if (!stats->b_debug_dir)
-		goto out;
-
-	stats->b_debug_check =
-		blockcheck_debugfs_create("blocks_checked",
-					  stats->b_debug_dir,
-					  &stats->b_check_count);
 
-	stats->b_debug_failure =
-		blockcheck_debugfs_create("checksums_failed",
-					  stats->b_debug_dir,
-					  &stats->b_failure_count);
+	blockcheck_debugfs_create("blocks_checked", stats->b_debug_dir,
+				  &stats->b_check_count);
 
-	stats->b_debug_recover =
-		blockcheck_debugfs_create("ecc_recoveries",
-					  stats->b_debug_dir,
-					  &stats->b_recover_count);
-	if (stats->b_debug_check && stats->b_debug_failure &&
-	    stats->b_debug_recover)
-		rc = 0;
+	blockcheck_debugfs_create("checksums_failed", stats->b_debug_dir,
+				  &stats->b_failure_count);
 
-out:
-	if (rc)
-		ocfs2_blockcheck_debug_remove(stats);
-	return rc;
+	blockcheck_debugfs_create("ecc_recoveries", stats->b_debug_dir,
+				  &stats->b_recover_count);
 }
 #else
-static inline int ocfs2_blockcheck_debug_install(struct ocfs2_blockcheck_stats *stats,
-						 struct dentry *parent)
+static inline void ocfs2_blockcheck_debug_install(struct ocfs2_blockcheck_stats *stats,
+						  struct dentry *parent)
 {
-	return 0;
 }
 
 static inline void ocfs2_blockcheck_debug_remove(struct ocfs2_blockcheck_stats *stats)
@@ -309,10 +273,10 @@ static inline void ocfs2_blockcheck_debug_remove(struct ocfs2_blockcheck_stats *
 #endif  /* CONFIG_DEBUG_FS */
 
 /* Always-called wrappers for starting and stopping the debugfs files */
-int ocfs2_blockcheck_stats_debugfs_install(struct ocfs2_blockcheck_stats *stats,
-					   struct dentry *parent)
+void ocfs2_blockcheck_stats_debugfs_install(struct ocfs2_blockcheck_stats *stats,
+					    struct dentry *parent)
 {
-	return ocfs2_blockcheck_debug_install(stats, parent);
+	ocfs2_blockcheck_debug_install(stats, parent);
 }
 
 void ocfs2_blockcheck_stats_debugfs_remove(struct ocfs2_blockcheck_stats *stats)
diff --git a/fs/ocfs2/blockcheck.h b/fs/ocfs2/blockcheck.h
index d4b69febf70a..8f17d2c85f40 100644
--- a/fs/ocfs2/blockcheck.h
+++ b/fs/ocfs2/blockcheck.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Checksum and ECC codes for the OCFS2 userspace library.
  *
  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License, version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #ifndef OCFS2_BLOCKCHECK_H
@@ -33,9 +25,6 @@ struct ocfs2_blockcheck_stats {
 	 * ocfs2_blockcheck_stats_debugfs_install()
 	 */
 	struct dentry *b_debug_dir;	/* Parent of the debugfs  files */
-	struct dentry *b_debug_check;	/* Exposes b_check_count */
-	struct dentry *b_debug_failure;	/* Exposes b_failure_count */
-	struct dentry *b_debug_recover;	/* Exposes b_recover_count */
 };
 
 
@@ -64,8 +53,8 @@ int ocfs2_block_check_validate_bhs(struct buffer_head **bhs, int nr,
 				   struct ocfs2_blockcheck_stats *stats);
 
 /* Debug Initialization */
-int ocfs2_blockcheck_stats_debugfs_install(struct ocfs2_blockcheck_stats *stats,
-					   struct dentry *parent);
+void ocfs2_blockcheck_stats_debugfs_install(struct ocfs2_blockcheck_stats *stats,
+					    struct dentry *parent);
 void ocfs2_blockcheck_stats_debugfs_remove(struct ocfs2_blockcheck_stats *stats);
 
 /*
diff --git a/fs/ocfs2/buffer_head_io.c b/fs/ocfs2/buffer_head_io.c
index f9b84f7a3e4b..f0b104e483d8 100644
--- a/fs/ocfs2/buffer_head_io.c
+++ b/fs/ocfs2/buffer_head_io.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Buffer cache handling
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/buffer_head_io.h b/fs/ocfs2/buffer_head_io.h
index b1bb70c8ca4d..1c5e533fba04 100644
--- a/fs/ocfs2/buffer_head_io.h
+++ b/fs/ocfs2/buffer_head_io.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Buffer cache handling functions defined
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_BUFFER_HEAD_IO_H
diff --git a/fs/ocfs2/cluster/Makefile b/fs/ocfs2/cluster/Makefile
index 1aefc0350ec3..0e5b73215819 100644
--- a/fs/ocfs2/cluster/Makefile
+++ b/fs/ocfs2/cluster/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 obj-$(CONFIG_OCFS2_FS) += ocfs2_nodemanager.o
 
 ocfs2_nodemanager-objs := heartbeat.o masklog.o sys.o nodemanager.o \
diff --git a/fs/ocfs2/cluster/heartbeat.c b/fs/ocfs2/cluster/heartbeat.c
index f3c20b279eb2..f1b613327ac8 100644
--- a/fs/ocfs2/cluster/heartbeat.c
+++ b/fs/ocfs2/cluster/heartbeat.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2004, 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/kernel.h>
@@ -106,10 +92,6 @@ static struct o2hb_debug_buf *o2hb_db_failedregions;
 #define O2HB_DEBUG_REGION_PINNED	"pinned"
 
 static struct dentry *o2hb_debug_dir;
-static struct dentry *o2hb_debug_livenodes;
-static struct dentry *o2hb_debug_liveregions;
-static struct dentry *o2hb_debug_quorumregions;
-static struct dentry *o2hb_debug_failedregions;
 
 static LIST_HEAD(o2hb_all_regions);
 
@@ -1198,7 +1180,7 @@ bail:
 	if (atomic_read(&reg->hr_steady_iterations) != 0) {
 		if (atomic_dec_and_test(&reg->hr_unsteady_iterations)) {
 			printk(KERN_NOTICE "o2hb: Unable to stabilize "
-			       "heartbeart on region %s (%s)\n",
+			       "heartbeat on region %s (%s)\n",
 			       config_item_name(&reg->hr_item),
 			       reg->hr_dev_name);
 			atomic_set(&reg->hr_steady_iterations, 0);
@@ -1405,11 +1387,7 @@ static const struct file_operations o2hb_debug_fops = {
 
 void o2hb_exit(void)
 {
-	debugfs_remove(o2hb_debug_failedregions);
-	debugfs_remove(o2hb_debug_quorumregions);
-	debugfs_remove(o2hb_debug_liveregions);
-	debugfs_remove(o2hb_debug_livenodes);
-	debugfs_remove(o2hb_debug_dir);
+	debugfs_remove_recursive(o2hb_debug_dir);
 	kfree(o2hb_db_livenodes);
 	kfree(o2hb_db_liveregions);
 	kfree(o2hb_db_quorumregions);
@@ -1433,79 +1411,37 @@ static struct dentry *o2hb_debug_create(const char *name, struct dentry *dir,
 				   &o2hb_debug_fops);
 }
 
-static int o2hb_debug_init(void)
+static void o2hb_debug_init(void)
 {
-	int ret = -ENOMEM;
-
 	o2hb_debug_dir = debugfs_create_dir(O2HB_DEBUG_DIR, NULL);
-	if (!o2hb_debug_dir) {
-		mlog_errno(ret);
-		goto bail;
-	}
-
-	o2hb_debug_livenodes = o2hb_debug_create(O2HB_DEBUG_LIVENODES,
-						 o2hb_debug_dir,
-						 &o2hb_db_livenodes,
-						 sizeof(*o2hb_db_livenodes),
-						 O2HB_DB_TYPE_LIVENODES,
-						 sizeof(o2hb_live_node_bitmap),
-						 O2NM_MAX_NODES,
-						 o2hb_live_node_bitmap);
-	if (!o2hb_debug_livenodes) {
-		mlog_errno(ret);
-		goto bail;
-	}
-
-	o2hb_debug_liveregions = o2hb_debug_create(O2HB_DEBUG_LIVEREGIONS,
-						   o2hb_debug_dir,
-						   &o2hb_db_liveregions,
-						   sizeof(*o2hb_db_liveregions),
-						   O2HB_DB_TYPE_LIVEREGIONS,
-						   sizeof(o2hb_live_region_bitmap),
-						   O2NM_MAX_REGIONS,
-						   o2hb_live_region_bitmap);
-	if (!o2hb_debug_liveregions) {
-		mlog_errno(ret);
-		goto bail;
-	}
 
-	o2hb_debug_quorumregions =
-			o2hb_debug_create(O2HB_DEBUG_QUORUMREGIONS,
-					  o2hb_debug_dir,
-					  &o2hb_db_quorumregions,
-					  sizeof(*o2hb_db_quorumregions),
-					  O2HB_DB_TYPE_QUORUMREGIONS,
-					  sizeof(o2hb_quorum_region_bitmap),
-					  O2NM_MAX_REGIONS,
-					  o2hb_quorum_region_bitmap);
-	if (!o2hb_debug_quorumregions) {
-		mlog_errno(ret);
-		goto bail;
-	}
+	o2hb_debug_create(O2HB_DEBUG_LIVENODES, o2hb_debug_dir,
+			  &o2hb_db_livenodes, sizeof(*o2hb_db_livenodes),
+			  O2HB_DB_TYPE_LIVENODES, sizeof(o2hb_live_node_bitmap),
+			  O2NM_MAX_NODES, o2hb_live_node_bitmap);
 
-	o2hb_debug_failedregions =
-			o2hb_debug_create(O2HB_DEBUG_FAILEDREGIONS,
-					  o2hb_debug_dir,
-					  &o2hb_db_failedregions,
-					  sizeof(*o2hb_db_failedregions),
-					  O2HB_DB_TYPE_FAILEDREGIONS,
-					  sizeof(o2hb_failed_region_bitmap),
-					  O2NM_MAX_REGIONS,
-					  o2hb_failed_region_bitmap);
-	if (!o2hb_debug_failedregions) {
-		mlog_errno(ret);
-		goto bail;
-	}
+	o2hb_debug_create(O2HB_DEBUG_LIVEREGIONS, o2hb_debug_dir,
+			  &o2hb_db_liveregions, sizeof(*o2hb_db_liveregions),
+			  O2HB_DB_TYPE_LIVEREGIONS,
+			  sizeof(o2hb_live_region_bitmap), O2NM_MAX_REGIONS,
+			  o2hb_live_region_bitmap);
 
-	ret = 0;
-bail:
-	if (ret)
-		o2hb_exit();
+	o2hb_debug_create(O2HB_DEBUG_QUORUMREGIONS, o2hb_debug_dir,
+			  &o2hb_db_quorumregions,
+			  sizeof(*o2hb_db_quorumregions),
+			  O2HB_DB_TYPE_QUORUMREGIONS,
+			  sizeof(o2hb_quorum_region_bitmap), O2NM_MAX_REGIONS,
+			  o2hb_quorum_region_bitmap);
 
-	return ret;
+	o2hb_debug_create(O2HB_DEBUG_FAILEDREGIONS, o2hb_debug_dir,
+			  &o2hb_db_failedregions,
+			  sizeof(*o2hb_db_failedregions),
+			  O2HB_DB_TYPE_FAILEDREGIONS,
+			  sizeof(o2hb_failed_region_bitmap), O2NM_MAX_REGIONS,
+			  o2hb_failed_region_bitmap);
 }
 
-int o2hb_init(void)
+void o2hb_init(void)
 {
 	int i;
 
@@ -1525,7 +1461,7 @@ int o2hb_init(void)
 
 	o2hb_dependent_users = 0;
 
-	return o2hb_debug_init();
+	o2hb_debug_init();
 }
 
 /* if we're already in a callback then we're already serialized by the sem */
diff --git a/fs/ocfs2/cluster/heartbeat.h b/fs/ocfs2/cluster/heartbeat.h
index a9e67efc0004..beed31ea86cf 100644
--- a/fs/ocfs2/cluster/heartbeat.h
+++ b/fs/ocfs2/cluster/heartbeat.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef O2CLUSTER_HEARTBEAT_H
@@ -78,7 +63,7 @@ void o2hb_unregister_callback(const char *region_uuid,
 void o2hb_fill_node_map(unsigned long *map,
 			unsigned bytes);
 void o2hb_exit(void);
-int o2hb_init(void);
+void o2hb_init(void);
 int o2hb_check_node_heartbeating_no_sem(u8 node_num);
 int o2hb_check_node_heartbeating_from_callback(u8 node_num);
 void o2hb_stop_all_regions(void);
diff --git a/fs/ocfs2/cluster/masklog.c b/fs/ocfs2/cluster/masklog.c
index d331c2386b94..1d696c96b8b2 100644
--- a/fs/ocfs2/cluster/masklog.c
+++ b/fs/ocfs2/cluster/masklog.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2004, 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/module.h>
diff --git a/fs/ocfs2/cluster/masklog.h b/fs/ocfs2/cluster/masklog.h
index a396096a5099..446e452ac7a6 100644
--- a/fs/ocfs2/cluster/masklog.h
+++ b/fs/ocfs2/cluster/masklog.h
@@ -1,22 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef O2CLUSTER_MASKLOG_H
diff --git a/fs/ocfs2/cluster/netdebug.c b/fs/ocfs2/cluster/netdebug.c
index 74a21f6695c8..02bf4a1774cc 100644
--- a/fs/ocfs2/cluster/netdebug.c
+++ b/fs/ocfs2/cluster/netdebug.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * debug functionality for o2net
  *
  * Copyright (C) 2005, 2008 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifdef CONFIG_DEBUG_FS
@@ -53,10 +38,6 @@
 #define SHOW_SOCK_STATS		1
 
 static struct dentry *o2net_dentry;
-static struct dentry *sc_dentry;
-static struct dentry *nst_dentry;
-static struct dentry *stats_dentry;
-static struct dentry *nodes_dentry;
 
 static DEFINE_SPINLOCK(o2net_debug_lock);
 
@@ -505,36 +486,23 @@ static const struct file_operations nodes_fops = {
 
 void o2net_debugfs_exit(void)
 {
-	debugfs_remove(nodes_dentry);
-	debugfs_remove(stats_dentry);
-	debugfs_remove(sc_dentry);
-	debugfs_remove(nst_dentry);
-	debugfs_remove(o2net_dentry);
+	debugfs_remove_recursive(o2net_dentry);
 }
 
-int o2net_debugfs_init(void)
+void o2net_debugfs_init(void)
 {
 	umode_t mode = S_IFREG|S_IRUSR;
 
 	o2net_dentry = debugfs_create_dir(O2NET_DEBUG_DIR, NULL);
-	if (o2net_dentry)
-		nst_dentry = debugfs_create_file(NST_DEBUG_NAME, mode,
-					o2net_dentry, NULL, &nst_seq_fops);
-	if (nst_dentry)
-		sc_dentry = debugfs_create_file(SC_DEBUG_NAME, mode,
-					o2net_dentry, NULL, &sc_seq_fops);
-	if (sc_dentry)
-		stats_dentry = debugfs_create_file(STATS_DEBUG_NAME, mode,
-					o2net_dentry, NULL, &stats_seq_fops);
-	if (stats_dentry)
-		nodes_dentry = debugfs_create_file(NODES_DEBUG_NAME, mode,
-					o2net_dentry, NULL, &nodes_fops);
-	if (nodes_dentry)
-		return 0;
-
-	o2net_debugfs_exit();
-	mlog_errno(-ENOMEM);
-	return -ENOMEM;
+
+	debugfs_create_file(NST_DEBUG_NAME, mode, o2net_dentry, NULL,
+			    &nst_seq_fops);
+	debugfs_create_file(SC_DEBUG_NAME, mode, o2net_dentry, NULL,
+			    &sc_seq_fops);
+	debugfs_create_file(STATS_DEBUG_NAME, mode, o2net_dentry, NULL,
+			    &stats_seq_fops);
+	debugfs_create_file(NODES_DEBUG_NAME, mode, o2net_dentry, NULL,
+			    &nodes_fops);
 }
 
 #endif	/* CONFIG_DEBUG_FS */
diff --git a/fs/ocfs2/cluster/nodemanager.c b/fs/ocfs2/cluster/nodemanager.c
index 0e4166cc23a0..7a7640c59f3c 100644
--- a/fs/ocfs2/cluster/nodemanager.c
+++ b/fs/ocfs2/cluster/nodemanager.c
@@ -1,22 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2004, 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/slab.h>
@@ -621,13 +607,15 @@ static void o2nm_node_group_drop_item(struct config_group *group,
 	struct o2nm_node *node = to_o2nm_node(item);
 	struct o2nm_cluster *cluster = to_o2nm_cluster(group->cg_item.ci_parent);
 
-	o2net_disconnect_node(node);
+	if (cluster->cl_nodes[node->nd_num] == node) {
+		o2net_disconnect_node(node);
 
-	if (cluster->cl_has_local &&
-	    (cluster->cl_local_node == node->nd_num)) {
-		cluster->cl_has_local = 0;
-		cluster->cl_local_node = O2NM_INVALID_NODE_NUM;
-		o2net_stop_listening(node);
+		if (cluster->cl_has_local &&
+		    (cluster->cl_local_node == node->nd_num)) {
+			cluster->cl_has_local = 0;
+			cluster->cl_local_node = O2NM_INVALID_NODE_NUM;
+			o2net_stop_listening(node);
+		}
 	}
 
 	/* XXX call into net to stop this node from trading messages */
@@ -840,9 +828,7 @@ static int __init init_o2nm(void)
 {
 	int ret = -1;
 
-	ret = o2hb_init();
-	if (ret)
-		goto out;
+	o2hb_init();
 
 	ret = o2net_init();
 	if (ret)
diff --git a/fs/ocfs2/cluster/nodemanager.h b/fs/ocfs2/cluster/nodemanager.h
index 09ea2d388bbb..3e0006631cc4 100644
--- a/fs/ocfs2/cluster/nodemanager.h
+++ b/fs/ocfs2/cluster/nodemanager.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef O2CLUSTER_NODEMANAGER_H
diff --git a/fs/ocfs2/cluster/ocfs2_heartbeat.h b/fs/ocfs2/cluster/ocfs2_heartbeat.h
index 3f4151da9709..760d850be11e 100644
--- a/fs/ocfs2/cluster/ocfs2_heartbeat.h
+++ b/fs/ocfs2/cluster/ocfs2_heartbeat.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * On-disk structures for ocfs2_heartbeat
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef _OCFS2_HEARTBEAT_H
diff --git a/fs/ocfs2/cluster/ocfs2_nodemanager.h b/fs/ocfs2/cluster/ocfs2_nodemanager.h
index 49b594325bec..21ad307419a8 100644
--- a/fs/ocfs2/cluster/ocfs2_nodemanager.h
+++ b/fs/ocfs2/cluster/ocfs2_nodemanager.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -7,22 +8,6 @@
  * for the ocfs2_nodemanager module.
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef _OCFS2_NODEMANAGER_H
diff --git a/fs/ocfs2/cluster/quorum.c b/fs/ocfs2/cluster/quorum.c
index af2e7473956e..5c424a099280 100644
--- a/fs/ocfs2/cluster/quorum.c
+++ b/fs/ocfs2/cluster/quorum.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  *
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 /* This quorum hack is only here until we transition to some more rational
@@ -81,6 +67,7 @@ static void o2quo_fence_self(void)
 	default:
 		WARN_ON(o2nm_single_cluster->cl_fence_method >=
 			O2NM_FENCE_METHODS);
+		/* fall through */
 	case O2NM_FENCE_RESET:
 		printk(KERN_ERR "*** ocfs2 is very sorry to be fencing this "
 		       "system by restarting ***\n");
@@ -89,7 +76,7 @@ static void o2quo_fence_self(void)
 	};
 }
 
-/* Indicate that a timeout occurred on a hearbeat region write. The
+/* Indicate that a timeout occurred on a heartbeat region write. The
  * other nodes in the cluster may consider us dead at that time so we
  * want to "fence" ourselves so that we don't scribble on the disk
  * after they think they've recovered us. This can't solve all
diff --git a/fs/ocfs2/cluster/quorum.h b/fs/ocfs2/cluster/quorum.h
index 6649cc6f67c9..6d45ce8b18a1 100644
--- a/fs/ocfs2/cluster/quorum.h
+++ b/fs/ocfs2/cluster/quorum.h
@@ -1,23 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef O2CLUSTER_QUORUM_H
diff --git a/fs/ocfs2/cluster/sys.c b/fs/ocfs2/cluster/sys.c
index b7f57271d49c..d6067c3d84c1 100644
--- a/fs/ocfs2/cluster/sys.c
+++ b/fs/ocfs2/cluster/sys.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * OCFS2 cluster sysfs interface
  *
  * Copyright (C) 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation,
- * version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #include <linux/kernel.h>
diff --git a/fs/ocfs2/cluster/sys.h b/fs/ocfs2/cluster/sys.h
index d66b8ab0045e..ce380517cf17 100644
--- a/fs/ocfs2/cluster/sys.h
+++ b/fs/ocfs2/cluster/sys.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * Function prototypes for o2cb sysfs interface
  *
  * Copyright (C) 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation,
- * version 2 of the License.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef O2CLUSTER_SYS_H
diff --git a/fs/ocfs2/cluster/tcp.c b/fs/ocfs2/cluster/tcp.c
index e9f236af1927..48a3398f0bf5 100644
--- a/fs/ocfs2/cluster/tcp.c
+++ b/fs/ocfs2/cluster/tcp.c
@@ -1,24 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  *
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  * ----
  *
  * Callers for this were originally written against a very simple synchronus
@@ -1776,7 +1762,7 @@ static void o2net_hb_node_up_cb(struct o2nm_node *node, int node_num,
 		(msecs_to_jiffies(o2net_reconnect_delay()) + 1);
 
 	if (node_num != o2nm_this_node()) {
-		/* believe it or not, accept and node hearbeating testing
+		/* believe it or not, accept and node heartbeating testing
 		 * can succeed for this node before we got here.. so
 		 * only use set_nn_state to clear the persistent error
 		 * if that hasn't already happened */
@@ -2143,8 +2129,7 @@ int o2net_init(void)
 
 	o2quo_init();
 
-	if (o2net_debugfs_init())
-		goto out;
+	o2net_debugfs_init();
 
 	o2net_hand = kzalloc(sizeof(struct o2net_handshake), GFP_KERNEL);
 	o2net_keep_req = kzalloc(sizeof(struct o2net_msg), GFP_KERNEL);
diff --git a/fs/ocfs2/cluster/tcp.h b/fs/ocfs2/cluster/tcp.h
index c571e849fda4..de87cbffd175 100644
--- a/fs/ocfs2/cluster/tcp.h
+++ b/fs/ocfs2/cluster/tcp.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef O2CLUSTER_TCP_H
@@ -124,16 +109,15 @@ struct o2net_send_tracking;
 struct o2net_sock_container;
 
 #ifdef CONFIG_DEBUG_FS
-int o2net_debugfs_init(void);
+void o2net_debugfs_init(void);
 void o2net_debugfs_exit(void);
 void o2net_debug_add_nst(struct o2net_send_tracking *nst);
 void o2net_debug_del_nst(struct o2net_send_tracking *nst);
 void o2net_debug_add_sc(struct o2net_sock_container *sc);
 void o2net_debug_del_sc(struct o2net_sock_container *sc);
 #else
-static inline int o2net_debugfs_init(void)
+static inline void o2net_debugfs_init(void)
 {
-	return 0;
 }
 static inline void o2net_debugfs_exit(void)
 {
diff --git a/fs/ocfs2/cluster/tcp_internal.h b/fs/ocfs2/cluster/tcp_internal.h
index 0276f7f8d5e6..e6a2b9dfcd16 100644
--- a/fs/ocfs2/cluster/tcp_internal.h
+++ b/fs/ocfs2/cluster/tcp_internal.h
@@ -1,22 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * Copyright (C) 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef O2CLUSTER_TCP_INTERNAL_H
diff --git a/fs/ocfs2/dcache.c b/fs/ocfs2/dcache.c
index 290373024d9d..42a61eecdacd 100644
--- a/fs/ocfs2/dcache.c
+++ b/fs/ocfs2/dcache.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * dentry cache handling code
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
@@ -310,6 +296,18 @@ int ocfs2_dentry_attach_lock(struct dentry *dentry,
 
 out_attach:
 	spin_lock(&dentry_attach_lock);
+	if (unlikely(dentry->d_fsdata && !alias)) {
+		/* d_fsdata is set by a racing thread which is doing
+		 * the same thing as this thread is doing. Leave the racing
+		 * thread going ahead and we return here.
+		 */
+		spin_unlock(&dentry_attach_lock);
+		iput(dl->dl_inode);
+		ocfs2_lock_res_free(&dl->dl_lockres);
+		kfree(dl);
+		return 0;
+	}
+
 	dentry->d_fsdata = dl;
 	dl->dl_count++;
 	spin_unlock(&dentry_attach_lock);
diff --git a/fs/ocfs2/dcache.h b/fs/ocfs2/dcache.h
index 55f58892b153..3686a52ba143 100644
--- a/fs/ocfs2/dcache.h
+++ b/fs/ocfs2/dcache.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_DCACHE_H
diff --git a/fs/ocfs2/dir.c b/fs/ocfs2/dir.c
index c121abbdfc7d..784426dee56c 100644
--- a/fs/ocfs2/dir.c
+++ b/fs/ocfs2/dir.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -19,21 +20,6 @@
  *   linux/fs/minix/dir.c
  *
  *   Copyright (C) 1991, 1992 Linus Torvalds
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
@@ -69,10 +55,6 @@
 #define NAMEI_RA_BLOCKS  4
 #define NAMEI_RA_SIZE        (NAMEI_RA_CHUNKS * NAMEI_RA_BLOCKS)
 
-static unsigned char ocfs2_filetype_table[] = {
-	DT_UNKNOWN, DT_REG, DT_DIR, DT_CHR, DT_BLK, DT_FIFO, DT_SOCK, DT_LNK
-};
-
 static int ocfs2_do_extend_dir(struct super_block *sb,
 			       handle_t *handle,
 			       struct inode *dir,
@@ -1718,7 +1700,7 @@ int __ocfs2_add_entry(handle_t *handle,
 				de->rec_len = cpu_to_le16(OCFS2_DIR_REC_LEN(de->name_len));
 				de = de1;
 			}
-			de->file_type = OCFS2_FT_UNKNOWN;
+			de->file_type = FT_UNKNOWN;
 			if (blkno) {
 				de->inode = cpu_to_le64(blkno);
 				ocfs2_set_de_type(de, inode->i_mode);
@@ -1803,13 +1785,9 @@ static int ocfs2_dir_foreach_blk_id(struct inode *inode,
 		}
 		offset += le16_to_cpu(de->rec_len);
 		if (le64_to_cpu(de->inode)) {
-			unsigned char d_type = DT_UNKNOWN;
-
-			if (de->file_type < OCFS2_FT_MAX)
-				d_type = ocfs2_filetype_table[de->file_type];
-
 			if (!dir_emit(ctx, de->name, de->name_len,
-				      le64_to_cpu(de->inode), d_type))
+				      le64_to_cpu(de->inode),
+				      fs_ftype_to_dtype(de->file_type)))
 				goto out;
 		}
 		ctx->pos += le16_to_cpu(de->rec_len);
@@ -1900,14 +1878,10 @@ static int ocfs2_dir_foreach_blk_el(struct inode *inode,
 				break;
 			}
 			if (le64_to_cpu(de->inode)) {
-				unsigned char d_type = DT_UNKNOWN;
-
-				if (de->file_type < OCFS2_FT_MAX)
-					d_type = ocfs2_filetype_table[de->file_type];
 				if (!dir_emit(ctx, de->name,
 						de->name_len,
 						le64_to_cpu(de->inode),
-						d_type)) {
+					fs_ftype_to_dtype(de->file_type))) {
 					brelse(bh);
 					return 0;
 				}
diff --git a/fs/ocfs2/dir.h b/fs/ocfs2/dir.h
index 3d8639f38973..e3e7d5dd29e8 100644
--- a/fs/ocfs2/dir.h
+++ b/fs/ocfs2/dir.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_DIR_H
diff --git a/fs/ocfs2/dlm/Makefile b/fs/ocfs2/dlm/Makefile
index ef2854422a6e..38b224372776 100644
--- a/fs/ocfs2/dlm/Makefile
+++ b/fs/ocfs2/dlm/Makefile
@@ -1,7 +1,7 @@
-ccflags-y := -I$(src)/..
+# SPDX-License-Identifier: GPL-2.0-only
+ccflags-y := -I $(srctree)/$(src)/..
 
 obj-$(CONFIG_OCFS2_FS_O2CB) += ocfs2_dlm.o
 
 ocfs2_dlm-objs := dlmdomain.o dlmdebug.o dlmthread.o dlmrecovery.o \
 	dlmmaster.o dlmast.o dlmconvert.o dlmlock.o dlmunlock.o
-
diff --git a/fs/ocfs2/dlm/dlmapi.h b/fs/ocfs2/dlm/dlmapi.h
index 3cfa114aa391..6456c0fbcbb2 100644
--- a/fs/ocfs2/dlm/dlmapi.h
+++ b/fs/ocfs2/dlm/dlmapi.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * externally exported dlm interfaces
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef DLMAPI_H
diff --git a/fs/ocfs2/dlm/dlmast.c b/fs/ocfs2/dlm/dlmast.c
index 39831fc2fd52..4de89af96abf 100644
--- a/fs/ocfs2/dlm/dlmast.c
+++ b/fs/ocfs2/dlm/dlmast.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * AST and BAST functionality for local and remote nodes
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 
diff --git a/fs/ocfs2/dlm/dlmcommon.h b/fs/ocfs2/dlm/dlmcommon.h
index d06e27ec4be4..69a429b625cc 100644
--- a/fs/ocfs2/dlm/dlmcommon.h
+++ b/fs/ocfs2/dlm/dlmcommon.h
@@ -1,25 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * dlmcommon.h
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef DLMCOMMON_H
diff --git a/fs/ocfs2/dlm/dlmconvert.c b/fs/ocfs2/dlm/dlmconvert.c
index 0bb128659d4b..965f45dbe17b 100644
--- a/fs/ocfs2/dlm/dlmconvert.c
+++ b/fs/ocfs2/dlm/dlmconvert.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * underlying calls for lock conversion
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 
diff --git a/fs/ocfs2/dlm/dlmconvert.h b/fs/ocfs2/dlm/dlmconvert.h
index b2e3677df878..12d9c28bc52f 100644
--- a/fs/ocfs2/dlm/dlmconvert.h
+++ b/fs/ocfs2/dlm/dlmconvert.h
@@ -1,25 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * dlmconvert.h
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef DLMCONVERT_H
diff --git a/fs/ocfs2/dlm/dlmdebug.c b/fs/ocfs2/dlm/dlmdebug.c
index 1d6dc8422899..a4b58ba99927 100644
--- a/fs/ocfs2/dlm/dlmdebug.c
+++ b/fs/ocfs2/dlm/dlmdebug.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * debug functionality for the dlm
  *
  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #include <linux/types.h>
@@ -866,7 +851,7 @@ static const struct file_operations debug_state_fops = {
 /* end  - debug state funcs */
 
 /* files in subroot */
-int dlm_debug_init(struct dlm_ctxt *dlm)
+void dlm_debug_init(struct dlm_ctxt *dlm)
 {
 	struct dlm_debug_ctxt *dc = dlm->dlm_debug_ctxt;
 
@@ -875,10 +860,6 @@ int dlm_debug_init(struct dlm_ctxt *dlm)
 						     S_IFREG|S_IRUSR,
 						     dlm->dlm_debugfs_subroot,
 						     dlm, &debug_state_fops);
-	if (!dc->debug_state_dentry) {
-		mlog_errno(-ENOMEM);
-		goto bail;
-	}
 
 	/* for dumping lockres */
 	dc->debug_lockres_dentry =
@@ -886,20 +867,12 @@ int dlm_debug_init(struct dlm_ctxt *dlm)
 					    S_IFREG|S_IRUSR,
 					    dlm->dlm_debugfs_subroot,
 					    dlm, &debug_lockres_fops);
-	if (!dc->debug_lockres_dentry) {
-		mlog_errno(-ENOMEM);
-		goto bail;
-	}
 
 	/* for dumping mles */
 	dc->debug_mle_dentry = debugfs_create_file(DLM_DEBUGFS_MLE_STATE,
 						   S_IFREG|S_IRUSR,
 						   dlm->dlm_debugfs_subroot,
 						   dlm, &debug_mle_fops);
-	if (!dc->debug_mle_dentry) {
-		mlog_errno(-ENOMEM);
-		goto bail;
-	}
 
 	/* for dumping lockres on the purge list */
 	dc->debug_purgelist_dentry =
@@ -907,15 +880,6 @@ int dlm_debug_init(struct dlm_ctxt *dlm)
 					    S_IFREG|S_IRUSR,
 					    dlm->dlm_debugfs_subroot,
 					    dlm, &debug_purgelist_fops);
-	if (!dc->debug_purgelist_dentry) {
-		mlog_errno(-ENOMEM);
-		goto bail;
-	}
-
-	return 0;
-
-bail:
-	return -ENOMEM;
 }
 
 void dlm_debug_shutdown(struct dlm_ctxt *dlm)
@@ -935,24 +899,16 @@ void dlm_debug_shutdown(struct dlm_ctxt *dlm)
 /* subroot - domain dir */
 int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm)
 {
-	dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name,
-						      dlm_debugfs_root);
-	if (!dlm->dlm_debugfs_subroot) {
-		mlog_errno(-ENOMEM);
-		goto bail;
-	}
-
 	dlm->dlm_debug_ctxt = kzalloc(sizeof(struct dlm_debug_ctxt),
 				      GFP_KERNEL);
 	if (!dlm->dlm_debug_ctxt) {
 		mlog_errno(-ENOMEM);
-		goto bail;
+		return -ENOMEM;
 	}
 
+	dlm->dlm_debugfs_subroot = debugfs_create_dir(dlm->name,
+						      dlm_debugfs_root);
 	return 0;
-bail:
-	dlm_destroy_debugfs_subroot(dlm);
-	return -ENOMEM;
 }
 
 void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm)
@@ -961,14 +917,9 @@ void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm)
 }
 
 /* debugfs root */
-int dlm_create_debugfs_root(void)
+void dlm_create_debugfs_root(void)
 {
 	dlm_debugfs_root = debugfs_create_dir(DLM_DEBUGFS_DIR, NULL);
-	if (!dlm_debugfs_root) {
-		mlog_errno(-ENOMEM);
-		return -ENOMEM;
-	}
-	return 0;
 }
 
 void dlm_destroy_debugfs_root(void)
diff --git a/fs/ocfs2/dlm/dlmdebug.h b/fs/ocfs2/dlm/dlmdebug.h
index 5ced5482e7d3..7d0c7c9013ce 100644
--- a/fs/ocfs2/dlm/dlmdebug.h
+++ b/fs/ocfs2/dlm/dlmdebug.h
@@ -1,25 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * dlmdebug.h
  *
  * Copyright (C) 2008 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef DLMDEBUG_H
@@ -43,20 +28,19 @@ struct debug_lockres {
 	struct dlm_lock_resource *dl_res;
 };
 
-int dlm_debug_init(struct dlm_ctxt *dlm);
+void dlm_debug_init(struct dlm_ctxt *dlm);
 void dlm_debug_shutdown(struct dlm_ctxt *dlm);
 
 int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm);
 void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm);
 
-int dlm_create_debugfs_root(void);
+void dlm_create_debugfs_root(void);
 void dlm_destroy_debugfs_root(void);
 
 #else
 
-static inline int dlm_debug_init(struct dlm_ctxt *dlm)
+static inline void dlm_debug_init(struct dlm_ctxt *dlm)
 {
-	return 0;
 }
 static inline void dlm_debug_shutdown(struct dlm_ctxt *dlm)
 {
@@ -68,9 +52,8 @@ static inline int dlm_create_debugfs_subroot(struct dlm_ctxt *dlm)
 static inline void dlm_destroy_debugfs_subroot(struct dlm_ctxt *dlm)
 {
 }
-static inline int dlm_create_debugfs_root(void)
+static inline void dlm_create_debugfs_root(void)
 {
-	return 0;
 }
 static inline void dlm_destroy_debugfs_root(void)
 {
diff --git a/fs/ocfs2/dlm/dlmdomain.c b/fs/ocfs2/dlm/dlmdomain.c
index 2acd58ba9b7b..7338b5d4647c 100644
--- a/fs/ocfs2/dlm/dlmdomain.c
+++ b/fs/ocfs2/dlm/dlmdomain.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * defines domain join / leave apis
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #include <linux/module.h>
@@ -1896,11 +1881,7 @@ static int dlm_join_domain(struct dlm_ctxt *dlm)
 		goto bail;
 	}
 
-	status = dlm_debug_init(dlm);
-	if (status < 0) {
-		mlog_errno(status);
-		goto bail;
-	}
+	dlm_debug_init(dlm);
 
 	snprintf(wq_name, O2NM_MAX_NAME_LEN, "dlm_wq-%s", dlm->name);
 	dlm->dlm_worker = alloc_workqueue(wq_name, WQ_MEM_RECLAIM, 0);
@@ -2361,9 +2342,7 @@ static int __init dlm_init(void)
 		goto error;
 	}
 
-	status = dlm_create_debugfs_root();
-	if (status)
-		goto error;
+	dlm_create_debugfs_root();
 
 	return 0;
 error:
diff --git a/fs/ocfs2/dlm/dlmdomain.h b/fs/ocfs2/dlm/dlmdomain.h
index 8a9281411c18..7c21664d23d0 100644
--- a/fs/ocfs2/dlm/dlmdomain.h
+++ b/fs/ocfs2/dlm/dlmdomain.h
@@ -1,25 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * dlmdomain.h
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 #ifndef DLMDOMAIN_H
diff --git a/fs/ocfs2/dlm/dlmlock.c b/fs/ocfs2/dlm/dlmlock.c
index 74962315794e..baff087f3863 100644
--- a/fs/ocfs2/dlm/dlmlock.c
+++ b/fs/ocfs2/dlm/dlmlock.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * underlying calls for lock creation
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 
diff --git a/fs/ocfs2/dlm/dlmmaster.c b/fs/ocfs2/dlm/dlmmaster.c
index 826f0567ec43..74b768ca1cd8 100644
--- a/fs/ocfs2/dlm/dlmmaster.c
+++ b/fs/ocfs2/dlm/dlmmaster.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * standalone DLM module
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 
@@ -2176,7 +2161,7 @@ put:
  * think that $RECOVERY is currently mastered by a dead node.  If so,
  * we wait a short time to allow that node to get notified by its own
  * heartbeat stack, then check again.  All $RECOVERY lock resources
- * mastered by dead nodes are purged when the hearbeat callback is
+ * mastered by dead nodes are purged when the heartbeat callback is
  * fired, so we can know for sure that it is safe to continue once
  * the node returns a live node or no node.  */
 static int dlm_pre_master_reco_lockres(struct dlm_ctxt *dlm,
diff --git a/fs/ocfs2/dlm/dlmrecovery.c b/fs/ocfs2/dlm/dlmrecovery.c
index 802636d50365..064ce5bbc3f6 100644
--- a/fs/ocfs2/dlm/dlmrecovery.c
+++ b/fs/ocfs2/dlm/dlmrecovery.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * recovery stuff
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 
@@ -1124,7 +1109,7 @@ static int dlm_send_mig_lockres_msg(struct dlm_ctxt *dlm,
 {
 	u64 mig_cookie = be64_to_cpu(mres->mig_cookie);
 	int mres_total_locks = be32_to_cpu(mres->total_locks);
-	int sz, ret = 0, status = 0;
+	int ret = 0, status = 0;
 	u8 orig_flags = mres->flags,
 	   orig_master = mres->master;
 
@@ -1132,9 +1117,6 @@ static int dlm_send_mig_lockres_msg(struct dlm_ctxt *dlm,
 	if (!mres->num_locks)
 		return 0;
 
-	sz = sizeof(struct dlm_migratable_lockres) +
-		(mres->num_locks * sizeof(struct dlm_migratable_lock));
-
 	/* add an all-done flag if we reached the last lock */
 	orig_flags = mres->flags;
 	BUG_ON(total_locks > mres_total_locks);
@@ -1148,7 +1130,8 @@ static int dlm_send_mig_lockres_msg(struct dlm_ctxt *dlm,
 
 	/* send it */
 	ret = o2net_send_message(DLM_MIG_LOCKRES_MSG, dlm->key, mres,
-				 sz, send_to, &status);
+				 struct_size(mres, ml, mres->num_locks),
+				 send_to, &status);
 	if (ret < 0) {
 		/* XXX: negative status is not handled.
 		 * this will end up killing this node. */
diff --git a/fs/ocfs2/dlm/dlmthread.c b/fs/ocfs2/dlm/dlmthread.c
index 074d5de17bb2..61c51c268460 100644
--- a/fs/ocfs2/dlm/dlmthread.c
+++ b/fs/ocfs2/dlm/dlmthread.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * standalone DLM module
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 
diff --git a/fs/ocfs2/dlm/dlmunlock.c b/fs/ocfs2/dlm/dlmunlock.c
index 63d701cd1e2e..e78657742bd8 100644
--- a/fs/ocfs2/dlm/dlmunlock.c
+++ b/fs/ocfs2/dlm/dlmunlock.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,22 +7,6 @@
  * underlying calls for unlocking locks
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  */
 
 
diff --git a/fs/ocfs2/dlmfs/Makefile b/fs/ocfs2/dlmfs/Makefile
index 33431a0296a3..a9874e441bd4 100644
--- a/fs/ocfs2/dlmfs/Makefile
+++ b/fs/ocfs2/dlmfs/Makefile
@@ -1,4 +1,5 @@
-ccflags-y := -I$(src)/..
+# SPDX-License-Identifier: GPL-2.0-only
+ccflags-y := -I $(srctree)/$(src)/..
 
 obj-$(CONFIG_OCFS2_FS) += ocfs2_dlmfs.o
 
diff --git a/fs/ocfs2/dlmfs/dlmfs.c b/fs/ocfs2/dlmfs/dlmfs.c
index 8decbe95dcec..4f1668c81e1f 100644
--- a/fs/ocfs2/dlmfs/dlmfs.c
+++ b/fs/ocfs2/dlmfs/dlmfs.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -9,21 +10,6 @@
  * which was a template for the fs side of this module.
  *
  * Copyright (C) 2003, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 /* Simple VFS hooks based on: */
@@ -349,17 +335,11 @@ static struct inode *dlmfs_alloc_inode(struct super_block *sb)
 	return &ip->ip_vfs_inode;
 }
 
-static void dlmfs_i_callback(struct rcu_head *head)
+static void dlmfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(dlmfs_inode_cache, DLMFS_I(inode));
 }
 
-static void dlmfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, dlmfs_i_callback);
-}
-
 static void dlmfs_evict_inode(struct inode *inode)
 {
 	int status;
@@ -605,7 +585,7 @@ static const struct inode_operations dlmfs_root_inode_operations = {
 static const struct super_operations dlmfs_ops = {
 	.statfs		= simple_statfs,
 	.alloc_inode	= dlmfs_alloc_inode,
-	.destroy_inode	= dlmfs_destroy_inode,
+	.free_inode	= dlmfs_free_inode,
 	.evict_inode	= dlmfs_evict_inode,
 	.drop_inode	= generic_delete_inode,
 };
diff --git a/fs/ocfs2/dlmfs/userdlm.c b/fs/ocfs2/dlmfs/userdlm.c
index 9cecf4857195..525b14ddfba5 100644
--- a/fs/ocfs2/dlmfs/userdlm.c
+++ b/fs/ocfs2/dlmfs/userdlm.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -10,21 +11,6 @@
  * functions.
  *
  * Copyright (C) 2003, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/signal.h>
diff --git a/fs/ocfs2/dlmfs/userdlm.h b/fs/ocfs2/dlmfs/userdlm.h
index ede94a6e7fd3..4bef7cdef859 100644
--- a/fs/ocfs2/dlmfs/userdlm.h
+++ b/fs/ocfs2/dlmfs/userdlm.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Userspace dlm defines
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 
diff --git a/fs/ocfs2/dlmglue.c b/fs/ocfs2/dlmglue.c
index 7c835824247e..14207234fa3d 100644
--- a/fs/ocfs2/dlmglue.c
+++ b/fs/ocfs2/dlmglue.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Code which implements an OCFS2 specific interface to our DLM.
  *
  * Copyright (C) 2003, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/types.h>
@@ -440,6 +426,7 @@ static void ocfs2_remove_lockres_tracking(struct ocfs2_lock_res *res)
 static void ocfs2_init_lock_stats(struct ocfs2_lock_res *res)
 {
 	res->l_lock_refresh = 0;
+	res->l_lock_wait = 0;
 	memset(&res->l_lock_prmode, 0, sizeof(struct ocfs2_lock_stats));
 	memset(&res->l_lock_exmode, 0, sizeof(struct ocfs2_lock_stats));
 }
@@ -474,6 +461,8 @@ static void ocfs2_update_lock_stats(struct ocfs2_lock_res *res, int level,
 
 	if (ret)
 		stats->ls_fail++;
+
+	stats->ls_last = ktime_to_us(ktime_get_real());
 }
 
 static inline void ocfs2_track_lock_refresh(struct ocfs2_lock_res *lockres)
@@ -481,6 +470,21 @@ static inline void ocfs2_track_lock_refresh(struct ocfs2_lock_res *lockres)
 	lockres->l_lock_refresh++;
 }
 
+static inline void ocfs2_track_lock_wait(struct ocfs2_lock_res *lockres)
+{
+	struct ocfs2_mask_waiter *mw;
+
+	if (list_empty(&lockres->l_mask_waiters)) {
+		lockres->l_lock_wait = 0;
+		return;
+	}
+
+	mw = list_first_entry(&lockres->l_mask_waiters,
+				struct ocfs2_mask_waiter, mw_item);
+	lockres->l_lock_wait =
+			ktime_to_us(ktime_mono_to_real(mw->mw_lock_start));
+}
+
 static inline void ocfs2_init_start_time(struct ocfs2_mask_waiter *mw)
 {
 	mw->mw_lock_start = ktime_get();
@@ -496,6 +500,9 @@ static inline void ocfs2_update_lock_stats(struct ocfs2_lock_res *res,
 static inline void ocfs2_track_lock_refresh(struct ocfs2_lock_res *lockres)
 {
 }
+static inline void ocfs2_track_lock_wait(struct ocfs2_lock_res *lockres)
+{
+}
 static inline void ocfs2_init_start_time(struct ocfs2_mask_waiter *mw)
 {
 }
@@ -686,6 +693,9 @@ void ocfs2_trim_fs_lock_res_init(struct ocfs2_super *osb)
 {
 	struct ocfs2_lock_res *lockres = &osb->osb_trim_fs_lockres;
 
+	/* Only one trimfs thread are allowed to work at the same time. */
+	mutex_lock(&osb->obs_trim_fs_mutex);
+
 	ocfs2_lock_res_init_once(lockres);
 	ocfs2_build_lock_name(OCFS2_LOCK_TYPE_TRIM_FS, 0, 0, lockres->l_name);
 	ocfs2_lock_res_init_common(osb, lockres, OCFS2_LOCK_TYPE_TRIM_FS,
@@ -698,6 +708,8 @@ void ocfs2_trim_fs_lock_res_uninit(struct ocfs2_super *osb)
 
 	ocfs2_simple_drop_lockres(osb, lockres);
 	ocfs2_lock_res_free(lockres);
+
+	mutex_unlock(&osb->obs_trim_fs_mutex);
 }
 
 static void ocfs2_orphan_scan_lock_res_init(struct ocfs2_lock_res *res,
@@ -884,6 +896,7 @@ static void lockres_set_flags(struct ocfs2_lock_res *lockres,
 		list_del_init(&mw->mw_item);
 		mw->mw_status = 0;
 		complete(&mw->mw_complete);
+		ocfs2_track_lock_wait(lockres);
 	}
 }
 static void lockres_or_flags(struct ocfs2_lock_res *lockres, unsigned long or)
@@ -1395,6 +1408,7 @@ static void lockres_add_mask_waiter(struct ocfs2_lock_res *lockres,
 	list_add_tail(&mw->mw_item, &lockres->l_mask_waiters);
 	mw->mw_mask = mask;
 	mw->mw_goal = goal;
+	ocfs2_track_lock_wait(lockres);
 }
 
 /* returns 0 if the mw that was removed was already satisfied, -EBUSY
@@ -1411,6 +1425,7 @@ static int __lockres_remove_mask_waiter(struct ocfs2_lock_res *lockres,
 
 		list_del_init(&mw->mw_item);
 		init_completion(&mw->mw_complete);
+		ocfs2_track_lock_wait(lockres);
 	}
 
 	return ret;
@@ -2998,6 +3013,8 @@ struct ocfs2_dlm_debug *ocfs2_new_dlm_debug(void)
 	kref_init(&dlm_debug->d_refcnt);
 	INIT_LIST_HEAD(&dlm_debug->d_lockres_tracking);
 	dlm_debug->d_locking_state = NULL;
+	dlm_debug->d_locking_filter = NULL;
+	dlm_debug->d_filter_secs = 0;
 out:
 	return dlm_debug;
 }
@@ -3088,17 +3105,43 @@ static void *ocfs2_dlm_seq_next(struct seq_file *m, void *v, loff_t *pos)
  *	- Lock stats printed
  * New in version 3
  *	- Max time in lock stats is in usecs (instead of nsecs)
+ * New in version 4
+ *	- Add last pr/ex unlock times and first lock wait time in usecs
  */
-#define OCFS2_DLM_DEBUG_STR_VERSION 3
+#define OCFS2_DLM_DEBUG_STR_VERSION 4
 static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
 {
 	int i;
 	char *lvb;
 	struct ocfs2_lock_res *lockres = v;
+#ifdef CONFIG_OCFS2_FS_STATS
+	u64 now, last;
+	struct ocfs2_dlm_debug *dlm_debug =
+			((struct ocfs2_dlm_seq_priv *)m->private)->p_dlm_debug;
+#endif
 
 	if (!lockres)
 		return -EINVAL;
 
+#ifdef CONFIG_OCFS2_FS_STATS
+	if (!lockres->l_lock_wait && dlm_debug->d_filter_secs) {
+		now = ktime_to_us(ktime_get_real());
+		if (lockres->l_lock_prmode.ls_last >
+		    lockres->l_lock_exmode.ls_last)
+			last = lockres->l_lock_prmode.ls_last;
+		else
+			last = lockres->l_lock_exmode.ls_last;
+		/*
+		 * Use d_filter_secs field to filter lock resources dump,
+		 * the default d_filter_secs(0) value filters nothing,
+		 * otherwise, only dump the last N seconds active lock
+		 * resources.
+		 */
+		if (div_u64(now - last, 1000000) > dlm_debug->d_filter_secs)
+			return 0;
+	}
+#endif
+
 	seq_printf(m, "0x%x\t", OCFS2_DLM_DEBUG_STR_VERSION);
 
 	if (lockres->l_type == OCFS2_LOCK_TYPE_DENTRY)
@@ -3140,6 +3183,9 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
 # define lock_max_prmode(_l)		((_l)->l_lock_prmode.ls_max)
 # define lock_max_exmode(_l)		((_l)->l_lock_exmode.ls_max)
 # define lock_refresh(_l)		((_l)->l_lock_refresh)
+# define lock_last_prmode(_l)		((_l)->l_lock_prmode.ls_last)
+# define lock_last_exmode(_l)		((_l)->l_lock_exmode.ls_last)
+# define lock_wait(_l)			((_l)->l_lock_wait)
 #else
 # define lock_num_prmode(_l)		(0)
 # define lock_num_exmode(_l)		(0)
@@ -3150,6 +3196,9 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
 # define lock_max_prmode(_l)		(0)
 # define lock_max_exmode(_l)		(0)
 # define lock_refresh(_l)		(0)
+# define lock_last_prmode(_l)		(0ULL)
+# define lock_last_exmode(_l)		(0ULL)
+# define lock_wait(_l)			(0ULL)
 #endif
 	/* The following seq_print was added in version 2 of this output */
 	seq_printf(m, "%u\t"
@@ -3160,7 +3209,10 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
 		   "%llu\t"
 		   "%u\t"
 		   "%u\t"
-		   "%u\t",
+		   "%u\t"
+		   "%llu\t"
+		   "%llu\t"
+		   "%llu\t",
 		   lock_num_prmode(lockres),
 		   lock_num_exmode(lockres),
 		   lock_num_prmode_failed(lockres),
@@ -3169,7 +3221,10 @@ static int ocfs2_dlm_seq_show(struct seq_file *m, void *v)
 		   lock_total_exmode(lockres),
 		   lock_max_prmode(lockres),
 		   lock_max_exmode(lockres),
-		   lock_refresh(lockres));
+		   lock_refresh(lockres),
+		   lock_last_prmode(lockres),
+		   lock_last_exmode(lockres),
+		   lock_wait(lockres));
 
 	/* End the line */
 	seq_printf(m, "\n");
@@ -3223,9 +3278,8 @@ static const struct file_operations ocfs2_dlm_debug_fops = {
 	.llseek =	seq_lseek,
 };
 
-static int ocfs2_dlm_init_debug(struct ocfs2_super *osb)
+static void ocfs2_dlm_init_debug(struct ocfs2_super *osb)
 {
-	int ret = 0;
 	struct ocfs2_dlm_debug *dlm_debug = osb->osb_dlm_debug;
 
 	dlm_debug->d_locking_state = debugfs_create_file("locking_state",
@@ -3233,16 +3287,11 @@ static int ocfs2_dlm_init_debug(struct ocfs2_super *osb)
 							 osb->osb_debug_root,
 							 osb,
 							 &ocfs2_dlm_debug_fops);
-	if (!dlm_debug->d_locking_state) {
-		ret = -EINVAL;
-		mlog(ML_ERROR,
-		     "Unable to create locking state debugfs file.\n");
-		goto out;
-	}
 
-	ocfs2_get_dlm_debug(dlm_debug);
-out:
-	return ret;
+	dlm_debug->d_locking_filter = debugfs_create_u32("locking_filter",
+						0600,
+						osb->osb_debug_root,
+						&dlm_debug->d_filter_secs);
 }
 
 static void ocfs2_dlm_shutdown_debug(struct ocfs2_super *osb)
@@ -3251,6 +3300,7 @@ static void ocfs2_dlm_shutdown_debug(struct ocfs2_super *osb)
 
 	if (dlm_debug) {
 		debugfs_remove(dlm_debug->d_locking_state);
+		debugfs_remove(dlm_debug->d_locking_filter);
 		ocfs2_put_dlm_debug(dlm_debug);
 	}
 }
@@ -3265,11 +3315,7 @@ int ocfs2_dlm_init(struct ocfs2_super *osb)
 		goto local;
 	}
 
-	status = ocfs2_dlm_init_debug(osb);
-	if (status < 0) {
-		mlog_errno(status);
-		goto bail;
-	}
+	ocfs2_dlm_init_debug(osb);
 
 	/* launch downconvert thread */
 	osb->dc_task = kthread_run(ocfs2_downconvert_thread, osb, "ocfs2dc-%s",
@@ -4361,7 +4407,6 @@ static int ocfs2_downconvert_thread_should_wake(struct ocfs2_super *osb)
 
 static int ocfs2_downconvert_thread(void *arg)
 {
-	int status = 0;
 	struct ocfs2_super *osb = arg;
 
 	/* only quit once we've been asked to stop and there is no more
@@ -4379,7 +4424,7 @@ static int ocfs2_downconvert_thread(void *arg)
 	}
 
 	osb->dc_task = NULL;
-	return status;
+	return 0;
 }
 
 void ocfs2_wake_downconvert_thread(struct ocfs2_super *osb)
diff --git a/fs/ocfs2/dlmglue.h b/fs/ocfs2/dlmglue.h
index 4ec1c828f6e0..b8fbed25df89 100644
--- a/fs/ocfs2/dlmglue.h
+++ b/fs/ocfs2/dlmglue.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * description here
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 
diff --git a/fs/ocfs2/export.c b/fs/ocfs2/export.c
index 4bf8d5854b27..69ed278dd84d 100644
--- a/fs/ocfs2/export.c
+++ b/fs/ocfs2/export.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Functions to facilitate NFS exporting
  *
  * Copyright (C) 2002, 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
@@ -148,16 +134,24 @@ static struct dentry *ocfs2_get_parent(struct dentry *child)
 	u64 blkno;
 	struct dentry *parent;
 	struct inode *dir = d_inode(child);
+	int set;
 
 	trace_ocfs2_get_parent(child, child->d_name.len, child->d_name.name,
 			       (unsigned long long)OCFS2_I(dir)->ip_blkno);
 
+	status = ocfs2_nfs_sync_lock(OCFS2_SB(dir->i_sb), 1);
+	if (status < 0) {
+		mlog(ML_ERROR, "getting nfs sync lock(EX) failed %d\n", status);
+		parent = ERR_PTR(status);
+		goto bail;
+	}
+
 	status = ocfs2_inode_lock(dir, NULL, 0);
 	if (status < 0) {
 		if (status != -ENOENT)
 			mlog_errno(status);
 		parent = ERR_PTR(status);
-		goto bail;
+		goto unlock_nfs_sync;
 	}
 
 	status = ocfs2_lookup_ino_from_name(dir, "..", 2, &blkno);
@@ -166,11 +160,31 @@ static struct dentry *ocfs2_get_parent(struct dentry *child)
 		goto bail_unlock;
 	}
 
+	status = ocfs2_test_inode_bit(OCFS2_SB(dir->i_sb), blkno, &set);
+	if (status < 0) {
+		if (status == -EINVAL) {
+			status = -ESTALE;
+		} else
+			mlog(ML_ERROR, "test inode bit failed %d\n", status);
+		parent = ERR_PTR(status);
+		goto bail_unlock;
+	}
+
+	trace_ocfs2_get_dentry_test_bit(status, set);
+	if (!set) {
+		status = -ESTALE;
+		parent = ERR_PTR(status);
+		goto bail_unlock;
+	}
+
 	parent = d_obtain_alias(ocfs2_iget(OCFS2_SB(dir->i_sb), blkno, 0, 0));
 
 bail_unlock:
 	ocfs2_inode_unlock(dir, 0);
 
+unlock_nfs_sync:
+	ocfs2_nfs_sync_unlock(OCFS2_SB(dir->i_sb), 1);
+
 bail:
 	trace_ocfs2_get_parent_end(parent);
 
diff --git a/fs/ocfs2/export.h b/fs/ocfs2/export.h
index 41a738678c37..d485da0c3439 100644
--- a/fs/ocfs2/export.h
+++ b/fs/ocfs2/export.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_EXPORT_H
diff --git a/fs/ocfs2/extent_map.c b/fs/ocfs2/extent_map.c
index 06cb96462bf9..e66a249fe07c 100644
--- a/fs/ocfs2/extent_map.c
+++ b/fs/ocfs2/extent_map.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,20 +7,6 @@
  * Block/Cluster mapping functions
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License, version 2,  as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/extent_map.h b/fs/ocfs2/extent_map.h
index 1057586ec19f..e5464f6cee8a 100644
--- a/fs/ocfs2/extent_map.h
+++ b/fs/ocfs2/extent_map.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,20 +7,6 @@
  * In-memory file extent mappings for OCFS2.
  *
  * Copyright (C) 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License, version 2,  as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef _EXTENT_MAP_H
diff --git a/fs/ocfs2/file.c b/fs/ocfs2/file.c
index d640c5f8a85d..4435df3e5adb 100644
--- a/fs/ocfs2/file.c
+++ b/fs/ocfs2/file.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * File open, close, extend, truncate
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/capability.h>
diff --git a/fs/ocfs2/file.h b/fs/ocfs2/file.h
index 7eb7f03531f6..4832cbceba5b 100644
--- a/fs/ocfs2/file.h
+++ b/fs/ocfs2/file.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_FILE_H
diff --git a/fs/ocfs2/filecheck.c b/fs/ocfs2/filecheck.c
index f65f2b2f594d..50f11bfdc8c2 100644
--- a/fs/ocfs2/filecheck.c
+++ b/fs/ocfs2/filecheck.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Code which implements online file check.
  *
  * Copyright (C) 2016 SuSE.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/list.h>
@@ -193,6 +185,7 @@ int ocfs2_filecheck_create_sysfs(struct ocfs2_super *osb)
 	ret = kobject_init_and_add(&entry->fs_kobj, &ocfs2_ktype_filecheck,
 					NULL, "filecheck");
 	if (ret) {
+		kobject_put(&entry->fs_kobj);
 		kfree(fcheck);
 		return ret;
 	}
diff --git a/fs/ocfs2/filecheck.h b/fs/ocfs2/filecheck.h
index 6a22ee79e8d0..4d006777ac54 100644
--- a/fs/ocfs2/filecheck.h
+++ b/fs/ocfs2/filecheck.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Online file check.
  *
  * Copyright (C) 2016 SuSE.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 
diff --git a/fs/ocfs2/heartbeat.c b/fs/ocfs2/heartbeat.c
index d8208b20dc53..60c5f995d30c 100644
--- a/fs/ocfs2/heartbeat.c
+++ b/fs/ocfs2/heartbeat.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -7,21 +8,6 @@
  * up to date, and fire off recovery when needed.
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/heartbeat.h b/fs/ocfs2/heartbeat.h
index 74b9c5dda28d..5fedb2d35dc0 100644
--- a/fs/ocfs2/heartbeat.h
+++ b/fs/ocfs2/heartbeat.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_HEARTBEAT_H
diff --git a/fs/ocfs2/inode.c b/fs/ocfs2/inode.c
index 79279240fb6e..7ad9d6590818 100644
--- a/fs/ocfs2/inode.c
+++ b/fs/ocfs2/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * vfs' aops, fops, dops and iops
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/inode.h b/fs/ocfs2/inode.h
index 9b955f732bca..51a4f7197987 100644
--- a/fs/ocfs2/inode.h
+++ b/fs/ocfs2/inode.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_INODE_H
diff --git a/fs/ocfs2/ioctl.c b/fs/ocfs2/ioctl.c
index 994726ada857..d6f7b299eb23 100644
--- a/fs/ocfs2/ioctl.c
+++ b/fs/ocfs2/ioctl.c
@@ -106,16 +106,9 @@ static int ocfs2_set_inode_attr(struct inode *inode, unsigned flags,
 	flags = flags & mask;
 	flags |= oldflags & ~mask;
 
-	/*
-	 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
-	 * the relevant capability.
-	 */
-	status = -EPERM;
-	if ((oldflags & OCFS2_IMMUTABLE_FL) || ((flags ^ oldflags) &
-		(OCFS2_APPEND_FL | OCFS2_IMMUTABLE_FL))) {
-		if (!capable(CAP_LINUX_IMMUTABLE))
-			goto bail_unlock;
-	}
+	status = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+	if (status)
+		goto bail_unlock;
 
 	handle = ocfs2_start_trans(osb, OCFS2_INODE_UPDATE_CREDITS);
 	if (IS_ERR(handle)) {
diff --git a/fs/ocfs2/journal.c b/fs/ocfs2/journal.c
index 46fd3ef2cf21..930e3d388579 100644
--- a/fs/ocfs2/journal.c
+++ b/fs/ocfs2/journal.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Defines functions of journalling api
  *
  * Copyright (C) 2003, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/journal.h b/fs/ocfs2/journal.h
index 497a4171ef61..c0fe6ed08ab1 100644
--- a/fs/ocfs2/journal.h
+++ b/fs/ocfs2/journal.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Defines journalling api and structures.
  *
  * Copyright (C) 2003, 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_JOURNAL_H
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index 58973e4d2471..158e5af767fd 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Node local data allocation
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
@@ -438,12 +424,11 @@ void ocfs2_shutdown_local_alloc(struct ocfs2_super *osb)
 	bh = osb->local_alloc_bh;
 	alloc = (struct ocfs2_dinode *) bh->b_data;
 
-	alloc_copy = kmalloc(bh->b_size, GFP_NOFS);
+	alloc_copy = kmemdup(alloc, bh->b_size, GFP_NOFS);
 	if (!alloc_copy) {
 		status = -ENOMEM;
 		goto out_commit;
 	}
-	memcpy(alloc_copy, alloc, bh->b_size);
 
 	status = ocfs2_journal_access_di(handle, INODE_CACHE(local_alloc_inode),
 					 bh, OCFS2_JOURNAL_ACCESS_WRITE);
@@ -1286,13 +1271,12 @@ static int ocfs2_local_alloc_slide_window(struct ocfs2_super *osb,
 	 * local alloc shutdown won't try to double free main bitmap
 	 * bits. Make a copy so the sync function knows which bits to
 	 * free. */
-	alloc_copy = kmalloc(osb->local_alloc_bh->b_size, GFP_NOFS);
+	alloc_copy = kmemdup(alloc, osb->local_alloc_bh->b_size, GFP_NOFS);
 	if (!alloc_copy) {
 		status = -ENOMEM;
 		mlog_errno(status);
 		goto bail;
 	}
-	memcpy(alloc_copy, alloc, osb->local_alloc_bh->b_size);
 
 	status = ocfs2_journal_access_di(handle,
 					 INODE_CACHE(local_alloc_inode),
diff --git a/fs/ocfs2/localalloc.h b/fs/ocfs2/localalloc.h
index 44a7d1fb2dec..e8a5cea48639 100644
--- a/fs/ocfs2/localalloc.h
+++ b/fs/ocfs2/localalloc.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_LOCALALLOC_H
diff --git a/fs/ocfs2/locks.c b/fs/ocfs2/locks.c
index b11acd34001a..7edc4e5c7c2c 100644
--- a/fs/ocfs2/locks.c
+++ b/fs/ocfs2/locks.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Userspace file locking support
  *
  * Copyright (C) 2007 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/locks.h b/fs/ocfs2/locks.h
index 496d488b271f..389fe1fce3a5 100644
--- a/fs/ocfs2/locks.h
+++ b/fs/ocfs2/locks.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes for Userspace file locking support
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_LOCKS_H
diff --git a/fs/ocfs2/mmap.c b/fs/ocfs2/mmap.c
index 05220b365fb9..3a44e461828a 100644
--- a/fs/ocfs2/mmap.c
+++ b/fs/ocfs2/mmap.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Code to deal with the mess that is clustered mmap.
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/move_extents.c b/fs/ocfs2/move_extents.c
index 1565dd8e8856..758d9661ef1e 100644
--- a/fs/ocfs2/move_extents.c
+++ b/fs/ocfs2/move_extents.c
@@ -1,18 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * move_extents.c
  *
  * Copyright (C) 2011 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 #include <linux/fs.h>
 #include <linux/types.h>
diff --git a/fs/ocfs2/move_extents.h b/fs/ocfs2/move_extents.h
index 4e143e811441..28cac43892c5 100644
--- a/fs/ocfs2/move_extents.h
+++ b/fs/ocfs2/move_extents.h
@@ -1,18 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * move_extents.h
  *
  * Copyright (C) 2011 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 #ifndef OCFS2_MOVE_EXTENTS_H
 #define OCFS2_MOVE_EXTENTS_H
diff --git a/fs/ocfs2/namei.c b/fs/ocfs2/namei.c
index b7ca84bc3df7..6f8e1c4fdb9c 100644
--- a/fs/ocfs2/namei.c
+++ b/fs/ocfs2/namei.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -19,21 +20,6 @@
  *   linux/fs/minix/dir.c
  *
  *   Copyright (C) 1991, 1992 Linux Torvalds
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/namei.h b/fs/ocfs2/namei.h
index 1155918d6784..cc091ed02b4a 100644
--- a/fs/ocfs2/namei.h
+++ b/fs/ocfs2/namei.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_NAMEI_H
diff --git a/fs/ocfs2/ocfs1_fs_compat.h b/fs/ocfs2/ocfs1_fs_compat.h
index dfb313bda5dd..01ae48c4834d 100644
--- a/fs/ocfs2/ocfs1_fs_compat.h
+++ b/fs/ocfs2/ocfs1_fs_compat.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -9,20 +10,6 @@
  * mount it.
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License, version 2,  as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef _OCFS1_FS_COMPAT_H
diff --git a/fs/ocfs2/ocfs2.h b/fs/ocfs2/ocfs2.h
index 4f86ac0027b5..fddbbd60f434 100644
--- a/fs/ocfs2/ocfs2.h
+++ b/fs/ocfs2/ocfs2.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Defines macros and structures used in OCFS2
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_H
@@ -164,6 +150,7 @@ struct ocfs2_lock_stats {
 
 	/* Storing max wait in usecs saves 24 bytes per inode */
 	u32		ls_max;		/* Max wait in USEC */
+	u64		ls_last;	/* Last unlock time in USEC */
 };
 #endif
 
@@ -205,6 +192,7 @@ struct ocfs2_lock_res {
 #ifdef CONFIG_OCFS2_FS_STATS
 	struct ocfs2_lock_stats  l_lock_prmode;		/* PR mode stats */
 	u32                      l_lock_refresh;	/* Disk refreshes */
+	u64                      l_lock_wait;	/* First lock wait time */
 	struct ocfs2_lock_stats  l_lock_exmode;		/* EX mode stats */
 #endif
 #ifdef CONFIG_DEBUG_LOCK_ALLOC
@@ -236,6 +224,8 @@ struct ocfs2_orphan_scan {
 struct ocfs2_dlm_debug {
 	struct kref d_refcnt;
 	struct dentry *d_locking_state;
+	struct dentry *d_locking_filter;
+	u32 d_filter_secs;
 	struct list_head d_lockres_tracking;
 };
 
@@ -407,6 +397,7 @@ struct ocfs2_super
 	struct ocfs2_lock_res osb_rename_lockres;
 	struct ocfs2_lock_res osb_nfs_sync_lockres;
 	struct ocfs2_lock_res osb_trim_fs_lockres;
+	struct mutex obs_trim_fs_mutex;
 	struct ocfs2_dlm_debug *osb_dlm_debug;
 
 	struct dentry *osb_debug_root;
diff --git a/fs/ocfs2/ocfs2_fs.h b/fs/ocfs2/ocfs2_fs.h
index 7071ad0dec90..0db4a7ec58a2 100644
--- a/fs/ocfs2/ocfs2_fs.h
+++ b/fs/ocfs2/ocfs2_fs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,20 +7,6 @@
  * On-disk structures for OCFS2.
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License, version 2,  as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef _OCFS2_FS_H
@@ -392,21 +379,6 @@ static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = {
 #define OCFS2_HB_GLOBAL			"heartbeat=global"
 
 /*
- * OCFS2 directory file types.  Only the low 3 bits are used.  The
- * other bits are reserved for now.
- */
-#define OCFS2_FT_UNKNOWN	0
-#define OCFS2_FT_REG_FILE	1
-#define OCFS2_FT_DIR		2
-#define OCFS2_FT_CHRDEV		3
-#define OCFS2_FT_BLKDEV		4
-#define OCFS2_FT_FIFO		5
-#define OCFS2_FT_SOCK		6
-#define OCFS2_FT_SYMLINK	7
-
-#define OCFS2_FT_MAX		8
-
-/*
  * OCFS2_DIR_PAD defines the directory entries boundaries
  *
  * NOTE: It must be a multiple of 4
@@ -424,17 +396,6 @@ static struct ocfs2_system_inode_info ocfs2_system_inodes[NUM_SYSTEM_INODES] = {
 #define	OCFS2_LINKS_HI_SHIFT	16
 #define	OCFS2_DX_ENTRIES_MAX	(0xffffffffU)
 
-#define S_SHIFT			12
-static unsigned char ocfs2_type_by_mode[S_IFMT >> S_SHIFT] = {
-	[S_IFREG >> S_SHIFT]  = OCFS2_FT_REG_FILE,
-	[S_IFDIR >> S_SHIFT]  = OCFS2_FT_DIR,
-	[S_IFCHR >> S_SHIFT]  = OCFS2_FT_CHRDEV,
-	[S_IFBLK >> S_SHIFT]  = OCFS2_FT_BLKDEV,
-	[S_IFIFO >> S_SHIFT]  = OCFS2_FT_FIFO,
-	[S_IFSOCK >> S_SHIFT] = OCFS2_FT_SOCK,
-	[S_IFLNK >> S_SHIFT]  = OCFS2_FT_SYMLINK,
-};
-
 
 /*
  * Convenience casts
@@ -1629,7 +1590,7 @@ static inline int ocfs2_sprintf_system_inode_name(char *buf, int len,
 static inline void ocfs2_set_de_type(struct ocfs2_dir_entry *de,
 				    umode_t mode)
 {
-	de->file_type = ocfs2_type_by_mode[(mode & S_IFMT)>>S_SHIFT];
+	de->file_type = fs_umode_to_ftype(mode);
 }
 
 static inline int ocfs2_gd_is_discontig(struct ocfs2_group_desc *gd)
diff --git a/fs/ocfs2/ocfs2_ioctl.h b/fs/ocfs2/ocfs2_ioctl.h
index 5b27ff1fa577..d7b31734f6be 100644
--- a/fs/ocfs2/ocfs2_ioctl.h
+++ b/fs/ocfs2/ocfs2_ioctl.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Defines OCFS2 ioctls.
  *
  * Copyright (C) 2010 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License, version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #ifndef OCFS2_IOCTL_H
diff --git a/fs/ocfs2/ocfs2_lockid.h b/fs/ocfs2/ocfs2_lockid.h
index 7051b994c776..b4be84956bc1 100644
--- a/fs/ocfs2/ocfs2_lockid.h
+++ b/fs/ocfs2/ocfs2_lockid.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Defines OCFS2 lockid bits.
  *
  * Copyright (C) 2002, 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_LOCKID_H
diff --git a/fs/ocfs2/ocfs2_lockingver.h b/fs/ocfs2/ocfs2_lockingver.h
index 2e45c8d2ea7e..5c9c105b33ee 100644
--- a/fs/ocfs2/ocfs2_lockingver.h
+++ b/fs/ocfs2/ocfs2_lockingver.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Defines OCFS2 Locking version values.
  *
  * Copyright (C) 2008 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License, version 2, as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #ifndef OCFS2_LOCKINGVER_H
diff --git a/fs/ocfs2/ocfs2_trace.h b/fs/ocfs2/ocfs2_trace.h
index 2ee76a90ba8f..dc4bce1649c1 100644
--- a/fs/ocfs2/ocfs2_trace.h
+++ b/fs/ocfs2/ocfs2_trace.h
@@ -712,6 +712,8 @@ TRACE_EVENT(ocfs2_trim_extent,
 
 DEFINE_OCFS2_ULL_UINT_UINT_UINT_EVENT(ocfs2_trim_group);
 
+DEFINE_OCFS2_ULL_ULL_ULL_EVENT(ocfs2_trim_mainbm);
+
 DEFINE_OCFS2_ULL_ULL_ULL_EVENT(ocfs2_trim_fs);
 
 /* End of trace events for fs/ocfs2/alloc.c. */
diff --git a/fs/ocfs2/refcounttree.c b/fs/ocfs2/refcounttree.c
index a35259eebc56..ee43e51188be 100644
--- a/fs/ocfs2/refcounttree.c
+++ b/fs/ocfs2/refcounttree.c
@@ -1,18 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * refcounttree.c
  *
  * Copyright (C) 2009 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/sort.h>
@@ -4719,22 +4711,23 @@ out:
 
 /* Lock an inode and grab a bh pointing to the inode. */
 int ocfs2_reflink_inodes_lock(struct inode *s_inode,
-			      struct buffer_head **bh1,
+			      struct buffer_head **bh_s,
 			      struct inode *t_inode,
-			      struct buffer_head **bh2)
+			      struct buffer_head **bh_t)
 {
-	struct inode *inode1;
-	struct inode *inode2;
+	struct inode *inode1 = s_inode;
+	struct inode *inode2 = t_inode;
 	struct ocfs2_inode_info *oi1;
 	struct ocfs2_inode_info *oi2;
+	struct buffer_head *bh1 = NULL;
+	struct buffer_head *bh2 = NULL;
 	bool same_inode = (s_inode == t_inode);
+	bool need_swap = (inode1->i_ino > inode2->i_ino);
 	int status;
 
 	/* First grab the VFS and rw locks. */
 	lock_two_nondirectories(s_inode, t_inode);
-	inode1 = s_inode;
-	inode2 = t_inode;
-	if (inode1->i_ino > inode2->i_ino)
+	if (need_swap)
 		swap(inode1, inode2);
 
 	status = ocfs2_rw_lock(inode1, 1);
@@ -4757,17 +4750,13 @@ int ocfs2_reflink_inodes_lock(struct inode *s_inode,
 	trace_ocfs2_double_lock((unsigned long long)oi1->ip_blkno,
 				(unsigned long long)oi2->ip_blkno);
 
-	if (*bh1)
-		*bh1 = NULL;
-	if (*bh2)
-		*bh2 = NULL;
-
 	/* We always want to lock the one with the lower lockid first. */
 	if (oi1->ip_blkno > oi2->ip_blkno)
 		mlog_errno(-ENOLCK);
 
 	/* lock id1 */
-	status = ocfs2_inode_lock_nested(inode1, bh1, 1, OI_LS_REFLINK_TARGET);
+	status = ocfs2_inode_lock_nested(inode1, &bh1, 1,
+					 OI_LS_REFLINK_TARGET);
 	if (status < 0) {
 		if (status != -ENOENT)
 			mlog_errno(status);
@@ -4776,15 +4765,25 @@ int ocfs2_reflink_inodes_lock(struct inode *s_inode,
 
 	/* lock id2 */
 	if (!same_inode) {
-		status = ocfs2_inode_lock_nested(inode2, bh2, 1,
+		status = ocfs2_inode_lock_nested(inode2, &bh2, 1,
 						 OI_LS_REFLINK_TARGET);
 		if (status < 0) {
 			if (status != -ENOENT)
 				mlog_errno(status);
 			goto out_cl1;
 		}
-	} else
-		*bh2 = *bh1;
+	} else {
+		bh2 = bh1;
+	}
+
+	/*
+	 * If we swapped inode order above, we have to swap the buffer heads
+	 * before passing them back to the caller.
+	 */
+	if (need_swap)
+		swap(bh1, bh2);
+	*bh_s = bh1;
+	*bh_t = bh2;
 
 	trace_ocfs2_double_lock_end(
 			(unsigned long long)oi1->ip_blkno,
@@ -4794,8 +4793,7 @@ int ocfs2_reflink_inodes_lock(struct inode *s_inode,
 
 out_cl1:
 	ocfs2_inode_unlock(inode1, 1);
-	brelse(*bh1);
-	*bh1 = NULL;
+	brelse(bh1);
 out_rw2:
 	ocfs2_rw_unlock(inode2, 1);
 out_i2:
diff --git a/fs/ocfs2/refcounttree.h b/fs/ocfs2/refcounttree.h
index e9e862be4a1e..0b9014495726 100644
--- a/fs/ocfs2/refcounttree.h
+++ b/fs/ocfs2/refcounttree.h
@@ -1,18 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * refcounttree.h
  *
  * Copyright (C) 2009 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 #ifndef OCFS2_REFCOUNTTREE_H
 #define OCFS2_REFCOUNTTREE_H
diff --git a/fs/ocfs2/reservations.c b/fs/ocfs2/reservations.c
index 6a348b0294ab..0249e8ca1028 100644
--- a/fs/ocfs2/reservations.c
+++ b/fs/ocfs2/reservations.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -13,15 +14,6 @@
  * Universite Pierre et Marie Curie (Paris VI)
  *
  * The rest is copyright (C) 2010 Novell.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/reservations.h b/fs/ocfs2/reservations.h
index 42c2b804f3fd..6ac88122896d 100644
--- a/fs/ocfs2/reservations.h
+++ b/fs/ocfs2/reservations.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Allocation reservations function prototypes and structures.
  *
  * Copyright (C) 2010 Novell.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #ifndef	OCFS2_RESERVATIONS_H
diff --git a/fs/ocfs2/resize.c b/fs/ocfs2/resize.c
index 18451e0fab81..24eb52f9059c 100644
--- a/fs/ocfs2/resize.c
+++ b/fs/ocfs2/resize.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -7,21 +8,6 @@
  * Inspired by ext3/resize.c.
  *
  * Copyright (C) 2007 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/resize.h b/fs/ocfs2/resize.h
index f38841abf10b..0af0c023042c 100644
--- a/fs/ocfs2/resize.h
+++ b/fs/ocfs2/resize.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2007 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_RESIZE_H
diff --git a/fs/ocfs2/slot_map.c b/fs/ocfs2/slot_map.c
index d7407994f308..8caeceeaeda7 100644
--- a/fs/ocfs2/slot_map.c
+++ b/fs/ocfs2/slot_map.c
@@ -1,26 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * slot_map.c
  *
- *
- *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/types.h>
@@ -55,7 +39,7 @@ struct ocfs2_slot_info {
 	unsigned int si_blocks;
 	struct buffer_head **si_bh;
 	unsigned int si_num_slots;
-	struct ocfs2_slot *si_slots;
+	struct ocfs2_slot si_slots[];
 };
 
 
@@ -420,9 +404,7 @@ int ocfs2_init_slot_info(struct ocfs2_super *osb)
 	struct inode *inode = NULL;
 	struct ocfs2_slot_info *si;
 
-	si = kzalloc(sizeof(struct ocfs2_slot_info) +
-		     (sizeof(struct ocfs2_slot) * osb->max_slots),
-		     GFP_KERNEL);
+	si = kzalloc(struct_size(si, si_slots, osb->max_slots), GFP_KERNEL);
 	if (!si) {
 		status = -ENOMEM;
 		mlog_errno(status);
@@ -431,8 +413,6 @@ int ocfs2_init_slot_info(struct ocfs2_super *osb)
 
 	si->si_extended = ocfs2_uses_extended_slot_map(osb);
 	si->si_num_slots = osb->max_slots;
-	si->si_slots = (struct ocfs2_slot *)((char *)si +
-					     sizeof(struct ocfs2_slot_info));
 
 	inode = ocfs2_get_system_file_inode(osb, SLOT_MAP_SYSTEM_INODE,
 					    OCFS2_INVALID_SLOT);
diff --git a/fs/ocfs2/slot_map.h b/fs/ocfs2/slot_map.h
index 601c95fd7003..93b53e73f0f7 100644
--- a/fs/ocfs2/slot_map.h
+++ b/fs/ocfs2/slot_map.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * description here
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 
diff --git a/fs/ocfs2/stack_o2cb.c b/fs/ocfs2/stack_o2cb.c
index 220cae7bbdbc..dbf8b5735808 100644
--- a/fs/ocfs2/stack_o2cb.c
+++ b/fs/ocfs2/stack_o2cb.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Code which interfaces ocfs2 with the o2cb stack.
  *
  * Copyright (C) 2007 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/kernel.h>
diff --git a/fs/ocfs2/stack_user.c b/fs/ocfs2/stack_user.c
index d2fb97b173da..7397064c3f35 100644
--- a/fs/ocfs2/stack_user.c
+++ b/fs/ocfs2/stack_user.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Code which interfaces ocfs2 with fs/dlm and a userspace stack.
  *
  * Copyright (C) 2007 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/module.h>
diff --git a/fs/ocfs2/stackglue.c b/fs/ocfs2/stackglue.c
index c4b029c43464..8aa6a667860c 100644
--- a/fs/ocfs2/stackglue.c
+++ b/fs/ocfs2/stackglue.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -7,15 +8,6 @@
  * cluster stacks.
  *
  * Copyright (C) 2007, 2009 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/list.h>
diff --git a/fs/ocfs2/stackglue.h b/fs/ocfs2/stackglue.h
index f2dce10fae54..e9d26cbeb3b8 100644
--- a/fs/ocfs2/stackglue.h
+++ b/fs/ocfs2/stackglue.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,15 +7,6 @@
  * Glue to the underlying cluster stack.
  *
  * Copyright (C) 2007 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation, version 2.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 
diff --git a/fs/ocfs2/suballoc.c b/fs/ocfs2/suballoc.c
index f7c972fbed6a..69c21a3843af 100644
--- a/fs/ocfs2/suballoc.c
+++ b/fs/ocfs2/suballoc.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -7,21 +8,6 @@
  * Inspired by ext3 block groups.
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/suballoc.h b/fs/ocfs2/suballoc.h
index 2d2501767c0c..f0a5d30a175d 100644
--- a/fs/ocfs2/suballoc.h
+++ b/fs/ocfs2/suballoc.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Defines sub allocator api
  *
  * Copyright (C) 2003, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef _CHAINALLOC_H_
diff --git a/fs/ocfs2/super.c b/fs/ocfs2/super.c
index 3415e0b09398..8b2f39506648 100644
--- a/fs/ocfs2/super.c
+++ b/fs/ocfs2/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * load/unload driver, mount/dismount volumes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/module.h>
@@ -134,7 +120,7 @@ static int ocfs2_get_sector(struct super_block *sb,
 			    int block,
 			    int sect_size);
 static struct inode *ocfs2_alloc_inode(struct super_block *sb);
-static void ocfs2_destroy_inode(struct inode *inode);
+static void ocfs2_free_inode(struct inode *inode);
 static int ocfs2_susp_quotas(struct ocfs2_super *osb, int unsuspend);
 static int ocfs2_enable_quotas(struct ocfs2_super *osb);
 static void ocfs2_disable_quotas(struct ocfs2_super *osb);
@@ -147,7 +133,7 @@ static struct dquot **ocfs2_get_dquots(struct inode *inode)
 static const struct super_operations ocfs2_sops = {
 	.statfs		= ocfs2_statfs,
 	.alloc_inode	= ocfs2_alloc_inode,
-	.destroy_inode	= ocfs2_destroy_inode,
+	.free_inode	= ocfs2_free_inode,
 	.drop_inode	= ocfs2_drop_inode,
 	.evict_inode	= ocfs2_evict_inode,
 	.sync_fs	= ocfs2_sync_fs,
@@ -575,17 +561,11 @@ static struct inode *ocfs2_alloc_inode(struct super_block *sb)
 	return &oi->vfs_inode;
 }
 
-static void ocfs2_i_callback(struct rcu_head *head)
+static void ocfs2_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(ocfs2_inode_cachep, OCFS2_I(inode));
 }
 
-static void ocfs2_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, ocfs2_i_callback);
-}
-
 static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
 						unsigned int cbits)
 {
@@ -600,7 +580,6 @@ static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
 	 */
 
 #if BITS_PER_LONG == 32
-# if defined(CONFIG_LBDAF)
 	BUILD_BUG_ON(sizeof(sector_t) != 8);
 	/*
 	 * We might be limited by page cache size.
@@ -614,15 +593,6 @@ static unsigned long long ocfs2_max_file_offset(unsigned int bbits,
 		 */
 		bitshift = 31;
 	}
-# else
-	/*
-	 * We are limited by the size of sector_t. Use block size, as
-	 * that's what we expose to the VFS.
-	 */
-	bytes = 1 << bbits;
-	trim = 1;
-	bitshift = 31;
-# endif
 #endif
 
 	/*
@@ -1109,33 +1079,15 @@ static int ocfs2_fill_super(struct super_block *sb, void *data, int silent)
 
 	osb->osb_debug_root = debugfs_create_dir(osb->uuid_str,
 						 ocfs2_debugfs_root);
-	if (!osb->osb_debug_root) {
-		status = -EINVAL;
-		mlog(ML_ERROR, "Unable to create per-mount debugfs root.\n");
-		goto read_super_error;
-	}
 
 	osb->osb_ctxt = debugfs_create_file("fs_state", S_IFREG|S_IRUSR,
 					    osb->osb_debug_root,
 					    osb,
 					    &ocfs2_osb_debug_fops);
-	if (!osb->osb_ctxt) {
-		status = -EINVAL;
-		mlog_errno(status);
-		goto read_super_error;
-	}
 
-	if (ocfs2_meta_ecc(osb)) {
-		status = ocfs2_blockcheck_stats_debugfs_install(
-						&osb->osb_ecc_stats,
-						osb->osb_debug_root);
-		if (status) {
-			mlog(ML_ERROR,
-			     "Unable to create blockcheck statistics "
-			     "files\n");
-			goto read_super_error;
-		}
-	}
+	if (ocfs2_meta_ecc(osb))
+		ocfs2_blockcheck_stats_debugfs_install( &osb->osb_ecc_stats,
+							osb->osb_debug_root);
 
 	status = ocfs2_mount_volume(sb);
 	if (status < 0)
@@ -1622,11 +1574,6 @@ static int __init ocfs2_init(void)
 		goto out2;
 
 	ocfs2_debugfs_root = debugfs_create_dir("ocfs2", NULL);
-	if (!ocfs2_debugfs_root) {
-		status = -ENOMEM;
-		mlog(ML_ERROR, "Unable to create ocfs2 debugfs root.\n");
-		goto out3;
-	}
 
 	ocfs2_set_locking_protocol();
 
@@ -1847,6 +1794,8 @@ static int ocfs2_mount_volume(struct super_block *sb)
 	if (ocfs2_is_hard_readonly(osb))
 		goto leave;
 
+	mutex_init(&osb->obs_trim_fs_mutex);
+
 	status = ocfs2_dlm_init(osb);
 	if (status < 0) {
 		mlog_errno(status);
diff --git a/fs/ocfs2/super.h b/fs/ocfs2/super.h
index d4550c8bbc41..76facaf63336 100644
--- a/fs/ocfs2/super.h
+++ b/fs/ocfs2/super.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_SUPER_H
diff --git a/fs/ocfs2/symlink.h b/fs/ocfs2/symlink.h
index 71ee4245e919..167094d1e5aa 100644
--- a/fs/ocfs2/symlink.h
+++ b/fs/ocfs2/symlink.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_SYMLINK_H
diff --git a/fs/ocfs2/sysfile.c b/fs/ocfs2/sysfile.c
index 5965f3878d49..bb701c4e449f 100644
--- a/fs/ocfs2/sysfile.c
+++ b/fs/ocfs2/sysfile.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Initialize, read, write, etc. system files.
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #include <linux/fs.h>
diff --git a/fs/ocfs2/sysfile.h b/fs/ocfs2/sysfile.h
index cc9ea661ffc1..a83dd962fccb 100644
--- a/fs/ocfs2/sysfile.h
+++ b/fs/ocfs2/sysfile.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Function prototypes
  *
  * Copyright (C) 2002, 2004 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_SYSFILE_H
diff --git a/fs/ocfs2/uptodate.c b/fs/ocfs2/uptodate.c
index 78f09c76ab3c..580852ba05c4 100644
--- a/fs/ocfs2/uptodate.c
+++ b/fs/ocfs2/uptodate.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -8,21 +9,6 @@
  *
  * Copyright (C) 2002, 2004, 2005 Oracle.  All rights reserved.
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
- *
  * Standard buffer head caching flags (uptodate, etc) are insufficient
  * in a clustered environment - a buffer may be marked up to date on
  * our local node but could have been modified by another cluster
diff --git a/fs/ocfs2/uptodate.h b/fs/ocfs2/uptodate.h
index 0d826fe2da0d..77a30cae4879 100644
--- a/fs/ocfs2/uptodate.h
+++ b/fs/ocfs2/uptodate.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -6,21 +7,6 @@
  * Cluster uptodate tracking
  *
  * Copyright (C) 2002, 2004, 2005 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License as published by the Free Software Foundation; either
- * version 2 of the License, or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public
- * License along with this program; if not, write to the
- * Free Software Foundation, Inc., 59 Temple Place - Suite 330,
- * Boston, MA 021110-1307, USA.
  */
 
 #ifndef OCFS2_UPTODATE_H
diff --git a/fs/ocfs2/xattr.c b/fs/ocfs2/xattr.c
index 3a24ce3deb01..385f3aaa2448 100644
--- a/fs/ocfs2/xattr.c
+++ b/fs/ocfs2/xattr.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
@@ -8,15 +9,6 @@
  * CREDITS:
  * Lots of code in this file is copy from linux/fs/ext3/xattr.c.
  * Copyright (C) 2001-2003 Andreas Gruenbacher, <agruen@suse.de>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #include <linux/capability.h>
diff --git a/fs/ocfs2/xattr.h b/fs/ocfs2/xattr.h
index 1633cc15ea1f..9c80382da1f5 100644
--- a/fs/ocfs2/xattr.h
+++ b/fs/ocfs2/xattr.h
@@ -1,18 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /* -*- mode: c; c-basic-offset: 8; -*-
  * vim: noexpandtab sw=8 ts=8 sts=0:
  *
  * xattr.h
  *
  * Copyright (C) 2004, 2008 Oracle.  All rights reserved.
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public
- * License version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
  */
 
 #ifndef OCFS2_XATTR_H
diff --git a/fs/omfs/Kconfig b/fs/omfs/Kconfig
index b1b9a0aba6fd..42b2ec35a05b 100644
--- a/fs/omfs/Kconfig
+++ b/fs/omfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config OMFS_FS
 	tristate "SonicBlue Optimized MPEG File System support"
 	depends on BLOCK
diff --git a/fs/omfs/Makefile b/fs/omfs/Makefile
index 8b82b63f1129..ae16fc3d34a3 100644
--- a/fs/omfs/Makefile
+++ b/fs/omfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 
 obj-$(CONFIG_OMFS_FS) += omfs.o
 
diff --git a/fs/omfs/dir.c b/fs/omfs/dir.c
index 4bee3a72b9f3..a0f45651f3b7 100644
--- a/fs/omfs/dir.c
+++ b/fs/omfs/dir.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * OMFS (as used by RIO Karma) directory operations.
  * Copyright (C) 2005 Bob Copeland <me@bobcopeland.com>
- * Released under GPL v2.
  */
 
 #include <linux/fs.h>
diff --git a/fs/omfs/file.c b/fs/omfs/file.c
index bf83e6644333..d640b9388238 100644
--- a/fs/omfs/file.c
+++ b/fs/omfs/file.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * OMFS (as used by RIO Karma) file operations.
  * Copyright (C) 2005 Bob Copeland <me@bobcopeland.com>
- * Released under GPL v2.
  */
 
 #include <linux/module.h>
diff --git a/fs/omfs/inode.c b/fs/omfs/inode.c
index ee14af9e26f2..08226a835ec3 100644
--- a/fs/omfs/inode.c
+++ b/fs/omfs/inode.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Optimized MPEG FS - inode and super operations.
  * Copyright (C) 2006 Bob Copeland <me@bobcopeland.com>
- * Released under GPL v2.
  */
 #include <linux/module.h>
 #include <linux/sched.h>
diff --git a/fs/open.c b/fs/open.c
index 0285ce7dbd51..b5b80469b93d 100644
--- a/fs/open.c
+++ b/fs/open.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/open.c
  *
@@ -733,6 +734,12 @@ static int do_dentry_open(struct file *f,
 		return 0;
 	}
 
+	/* Any file opened for execve()/uselib() has to be a regular file. */
+	if (unlikely(f->f_flags & FMODE_EXEC && !S_ISREG(inode->i_mode))) {
+		error = -EACCES;
+		goto cleanup_file;
+	}
+
 	if (f->f_mode & FMODE_WRITE && !special_file(inode->i_mode)) {
 		error = get_write_access(inode);
 		if (unlikely(error))
@@ -1209,3 +1216,22 @@ int nonseekable_open(struct inode *inode, struct file *filp)
 }
 
 EXPORT_SYMBOL(nonseekable_open);
+
+/*
+ * stream_open is used by subsystems that want stream-like file descriptors.
+ * Such file descriptors are not seekable and don't have notion of position
+ * (file.f_pos is always 0 and ppos passed to .read()/.write() is always NULL).
+ * Contrary to file descriptors of other regular files, .read() and .write()
+ * can run simultaneously.
+ *
+ * stream_open never fails and is marked to return int so that it could be
+ * directly used as file_operations.open .
+ */
+int stream_open(struct inode *inode, struct file *filp)
+{
+	filp->f_mode &= ~(FMODE_LSEEK | FMODE_PREAD | FMODE_PWRITE | FMODE_ATOMIC_POS);
+	filp->f_mode |= FMODE_STREAM;
+	return 0;
+}
+
+EXPORT_SYMBOL(stream_open);
diff --git a/fs/openpromfs/Makefile b/fs/openpromfs/Makefile
index 4563199b8fe6..843c270cd06f 100644
--- a/fs/openpromfs/Makefile
+++ b/fs/openpromfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux Sun Openprom filesystem routines.
 #
diff --git a/fs/openpromfs/inode.c b/fs/openpromfs/inode.c
index 1b2d0d2fe2ee..e6cb7689fec4 100644
--- a/fs/openpromfs/inode.c
+++ b/fs/openpromfs/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* inode.c: /proc/openprom handling routines
  *
  * Copyright (C) 1996-1999 Jakub Jelinek  (jakub@redhat.com)
@@ -336,17 +337,11 @@ static struct inode *openprom_alloc_inode(struct super_block *sb)
 	return &oi->vfs_inode;
 }
 
-static void openprom_i_callback(struct rcu_head *head)
+static void openprom_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(op_inode_cachep, OP_I(inode));
 }
 
-static void openprom_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, openprom_i_callback);
-}
-
 static struct inode *openprom_iget(struct super_block *sb, ino_t ino)
 {
 	struct inode *inode;
@@ -375,7 +370,7 @@ static int openprom_remount(struct super_block *sb, int *flags, char *data)
 
 static const struct super_operations openprom_sops = {
 	.alloc_inode	= openprom_alloc_inode,
-	.destroy_inode	= openprom_destroy_inode,
+	.free_inode	= openprom_free_inode,
 	.statfs		= simple_statfs,
 	.remount_fs	= openprom_remount,
 };
diff --git a/fs/orangefs/Kconfig b/fs/orangefs/Kconfig
index 1554c02489de..890c0ae9a453 100644
--- a/fs/orangefs/Kconfig
+++ b/fs/orangefs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config ORANGEFS_FS
 	tristate "ORANGEFS (Powered by PVFS) support"
 	select FS_POSIX_ACL
diff --git a/fs/orangefs/acl.c b/fs/orangefs/acl.c
index 72d2ff17d27b..eced272a3c57 100644
--- a/fs/orangefs/acl.c
+++ b/fs/orangefs/acl.c
@@ -142,7 +142,7 @@ int orangefs_set_acl(struct inode *inode, struct posix_acl *acl, int type)
 			rc = __orangefs_set_acl(inode, acl, type);
 		} else {
 			iattr.ia_valid = ATTR_MODE;
-			rc = orangefs_inode_setattr(inode, &iattr);
+			rc = __orangefs_setattr(inode, &iattr);
 		}
 
 		return rc;
@@ -185,7 +185,7 @@ int orangefs_init_acl(struct inode *inode, struct inode *dir)
 		inode->i_mode = mode;
 		iattr.ia_mode = mode;
 		iattr.ia_valid |= ATTR_MODE;
-		orangefs_inode_setattr(inode, &iattr);
+		__orangefs_setattr(inode, &iattr);
 	}
 
 	return error;
diff --git a/fs/orangefs/file.c b/fs/orangefs/file.c
index a5a2fe76568f..679a3c8e4fb3 100644
--- a/fs/orangefs/file.c
+++ b/fs/orangefs/file.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
  * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
  *
  * See COPYING in top-level directory.
  */
@@ -44,15 +45,16 @@ static int flush_racache(struct inode *inode)
 /*
  * Post and wait for the I/O upcall to finish
  */
-static ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inode,
-		loff_t *offset, struct iov_iter *iter,
-		size_t total_size, loff_t readahead_size)
+ssize_t wait_for_direct_io(enum ORANGEFS_io_type type, struct inode *inode,
+    loff_t *offset, struct iov_iter *iter, size_t total_size,
+    loff_t readahead_size, struct orangefs_write_range *wr, int *index_return)
 {
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 	struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
 	struct orangefs_kernel_op_s *new_op = NULL;
 	int buffer_index = -1;
 	ssize_t ret;
+	size_t copy_amount;
 
 	new_op = op_alloc(ORANGEFS_VFS_OP_FILE_IO);
 	if (!new_op)
@@ -84,6 +86,10 @@ populate_shared_memory:
 	new_op->upcall.req.io.buf_index = buffer_index;
 	new_op->upcall.req.io.count = total_size;
 	new_op->upcall.req.io.offset = *offset;
+	if (type == ORANGEFS_IO_WRITE && wr) {
+		new_op->upcall.uid = from_kuid(&init_user_ns, wr->uid);
+		new_op->upcall.gid = from_kgid(&init_user_ns, wr->gid);
+	}
 
 	gossip_debug(GOSSIP_FILE_DEBUG,
 		     "%s(%pU): offset: %llu total_size: %zd\n",
@@ -168,7 +174,10 @@ populate_shared_memory:
 			 * trigger the write.
 			 */
 			case OP_VFS_STATE_INPROGR:
-				ret = total_size;
+				if (type == ORANGEFS_IO_READ)
+					ret = -EINTR;
+				else
+					ret = total_size;
 				break;
 			default:
 				gossip_err("%s: unexpected op state :%d:.\n",
@@ -204,8 +213,25 @@ populate_shared_memory:
 		 *       can futher be kernel-space or user-space addresses.
 		 *       or it can pointers to struct page's
 		 */
+
+		/*
+		 * When reading, readahead_size will only be zero when
+		 * we're doing O_DIRECT, otherwise we got here from
+		 * orangefs_readpage.
+		 *
+		 * If we got here from orangefs_readpage we want to
+		 * copy either a page or the whole file into the io
+		 * vector, whichever is smaller.
+		 */
+		if (readahead_size)
+			copy_amount =
+				min(new_op->downcall.resp.io.amt_complete,
+					(__s64)PAGE_SIZE);
+		else
+			copy_amount = new_op->downcall.resp.io.amt_complete;
+
 		ret = orangefs_bufmap_copy_to_iovec(iter, buffer_index,
-		    new_op->downcall.resp.io.amt_complete);
+			copy_amount);
 		if (ret < 0) {
 			gossip_err("%s: Failed to copy-out buffers. Please make sure that the pvfs2-client is running (%ld)\n",
 			    __func__, (long)ret);
@@ -223,250 +249,128 @@ populate_shared_memory:
 
 out:
 	if (buffer_index >= 0) {
-		orangefs_bufmap_put(buffer_index);
-		gossip_debug(GOSSIP_FILE_DEBUG,
-			     "%s(%pU): PUT buffer_index %d\n",
-			     __func__, handle, buffer_index);
+		if ((readahead_size) && (type == ORANGEFS_IO_READ)) {
+			/* readpage */
+			*index_return = buffer_index;
+			gossip_debug(GOSSIP_FILE_DEBUG,
+				"%s: hold on to buffer_index :%d:\n",
+				__func__, buffer_index);
+		} else {
+			/* O_DIRECT */
+			orangefs_bufmap_put(buffer_index);
+			gossip_debug(GOSSIP_FILE_DEBUG,
+				"%s(%pU): PUT buffer_index %d\n",
+				__func__, handle, buffer_index);
+		}
 		buffer_index = -1;
 	}
 	op_release(new_op);
 	return ret;
 }
 
-/*
- * Common entry point for read/write/readv/writev
- * This function will dispatch it to either the direct I/O
- * or buffered I/O path depending on the mount options and/or
- * augmented/extended metadata attached to the file.
- * Note: File extended attributes override any mount options.
- */
-static ssize_t do_readv_writev(enum ORANGEFS_io_type type, struct file *file,
-		loff_t *offset, struct iov_iter *iter)
+int orangefs_revalidate_mapping(struct inode *inode)
 {
-	struct inode *inode = file->f_mapping->host;
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
-	struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
-	size_t count = iov_iter_count(iter);
-	ssize_t total_count = 0;
-	ssize_t ret = -EINVAL;
-
-	gossip_debug(GOSSIP_FILE_DEBUG,
-		"%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
-		__func__,
-		handle,
-		(int)count);
-
-	if (type == ORANGEFS_IO_WRITE) {
-		gossip_debug(GOSSIP_FILE_DEBUG,
-			     "%s(%pU): proceeding with offset : %llu, "
-			     "size %d\n",
-			     __func__,
-			     handle,
-			     llu(*offset),
-			     (int)count);
-	}
+	struct address_space *mapping = inode->i_mapping;
+	unsigned long *bitlock = &orangefs_inode->bitlock;
+	int ret;
 
-	if (count == 0) {
-		ret = 0;
-		goto out;
+	while (1) {
+		ret = wait_on_bit(bitlock, 1, TASK_KILLABLE);
+		if (ret)
+			return ret;
+		spin_lock(&inode->i_lock);
+		if (test_bit(1, bitlock)) {
+			spin_unlock(&inode->i_lock);
+			continue;
+		}
+		if (!time_before(jiffies, orangefs_inode->mapping_time))
+			break;
+		spin_unlock(&inode->i_lock);
+		return 0;
 	}
 
-	while (iov_iter_count(iter)) {
-		size_t each_count = iov_iter_count(iter);
-		size_t amt_complete;
-
-		/* how much to transfer in this loop iteration */
-		if (each_count > orangefs_bufmap_size_query())
-			each_count = orangefs_bufmap_size_query();
-
-		gossip_debug(GOSSIP_FILE_DEBUG,
-			     "%s(%pU): size of each_count(%d)\n",
-			     __func__,
-			     handle,
-			     (int)each_count);
-		gossip_debug(GOSSIP_FILE_DEBUG,
-			     "%s(%pU): BEFORE wait_for_io: offset is %d\n",
-			     __func__,
-			     handle,
-			     (int)*offset);
-
-		ret = wait_for_direct_io(type, inode, offset, iter,
-				each_count, 0);
-		gossip_debug(GOSSIP_FILE_DEBUG,
-			     "%s(%pU): return from wait_for_io:%d\n",
-			     __func__,
-			     handle,
-			     (int)ret);
-
-		if (ret < 0)
-			goto out;
-
-		*offset += ret;
-		total_count += ret;
-		amt_complete = ret;
-
-		gossip_debug(GOSSIP_FILE_DEBUG,
-			     "%s(%pU): AFTER wait_for_io: offset is %d\n",
-			     __func__,
-			     handle,
-			     (int)*offset);
+	set_bit(1, bitlock);
+	smp_wmb();
+	spin_unlock(&inode->i_lock);
 
-		/*
-		 * if we got a short I/O operations,
-		 * fall out and return what we got so far
-		 */
-		if (amt_complete < each_count)
-			break;
-	} /*end while */
+	unmap_mapping_range(mapping, 0, 0, 0);
+	ret = filemap_write_and_wait(mapping);
+	if (!ret)
+		ret = invalidate_inode_pages2(mapping);
 
-out:
-	if (total_count > 0)
-		ret = total_count;
-	if (ret > 0) {
-		if (type == ORANGEFS_IO_READ) {
-			file_accessed(file);
-		} else {
-			file_update_time(file);
-			/*
-			 * Must invalidate to ensure write loop doesn't
-			 * prevent kernel from reading updated
-			 * attribute.  Size probably changed because of
-			 * the write, and other clients could update
-			 * any other attribute.
-			 */
-			orangefs_inode->getattr_time = jiffies - 1;
-		}
-	}
+	orangefs_inode->mapping_time = jiffies +
+	    orangefs_cache_timeout_msecs*HZ/1000;
 
-	gossip_debug(GOSSIP_FILE_DEBUG,
-		     "%s(%pU): Value(%d) returned.\n",
-		     __func__,
-		     handle,
-		     (int)ret);
+	clear_bit(1, bitlock);
+	smp_mb__after_atomic();
+	wake_up_bit(bitlock, 1);
 
 	return ret;
 }
 
-/*
- * Read data from a specified offset in a file (referenced by inode).
- * Data may be placed either in a user or kernel buffer.
- */
-ssize_t orangefs_inode_read(struct inode *inode,
-			    struct iov_iter *iter,
-			    loff_t *offset,
-			    loff_t readahead_size)
+static ssize_t orangefs_file_read_iter(struct kiocb *iocb,
+    struct iov_iter *iter)
 {
-	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
-	size_t count = iov_iter_count(iter);
-	size_t bufmap_size;
-	ssize_t ret = -EINVAL;
+	int ret;
+	struct orangefs_read_options *ro;
 
 	orangefs_stats.reads++;
 
-	bufmap_size = orangefs_bufmap_size_query();
-	if (count > bufmap_size) {
-		gossip_debug(GOSSIP_FILE_DEBUG,
-			     "%s: count is too large (%zd/%zd)!\n",
-			     __func__, count, bufmap_size);
-		return -EINVAL;
+	/*
+	 * Remember how they set "count" in read(2) or pread(2) or whatever -
+	 * users can use count as a knob to control orangefs io size and later
+	 * we can try to help them fill as many pages as possible in readpage.
+	 */
+	if (!iocb->ki_filp->private_data) {
+		iocb->ki_filp->private_data = kmalloc(sizeof *ro, GFP_KERNEL);
+		if (!iocb->ki_filp->private_data)
+			return(ENOMEM);
+		ro = iocb->ki_filp->private_data;
+		ro->blksiz = iter->count;
 	}
 
-	gossip_debug(GOSSIP_FILE_DEBUG,
-		     "%s(%pU) %zd@%llu\n",
-		     __func__,
-		     &orangefs_inode->refn.khandle,
-		     count,
-		     llu(*offset));
-
-	ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, offset, iter,
-			count, readahead_size);
-	if (ret > 0)
-		*offset += ret;
-
-	gossip_debug(GOSSIP_FILE_DEBUG,
-		     "%s(%pU): Value(%zd) returned.\n",
-		     __func__,
-		     &orangefs_inode->refn.khandle,
-		     ret);
+	down_read(&file_inode(iocb->ki_filp)->i_rwsem);
+	ret = orangefs_revalidate_mapping(file_inode(iocb->ki_filp));
+	if (ret)
+		goto out;
 
+	ret = generic_file_read_iter(iocb, iter);
+out:
+	up_read(&file_inode(iocb->ki_filp)->i_rwsem);
 	return ret;
 }
 
-static ssize_t orangefs_file_read_iter(struct kiocb *iocb, struct iov_iter *iter)
+static ssize_t orangefs_file_write_iter(struct kiocb *iocb,
+    struct iov_iter *iter)
 {
-	struct file *file = iocb->ki_filp;
-	loff_t pos = iocb->ki_pos;
-	ssize_t rc = 0;
-
-	BUG_ON(iocb->private);
-
-	gossip_debug(GOSSIP_FILE_DEBUG, "orangefs_file_read_iter\n");
-
-	orangefs_stats.reads++;
+	int ret;
+	orangefs_stats.writes++;
 
-	rc = do_readv_writev(ORANGEFS_IO_READ, file, &pos, iter);
-	iocb->ki_pos = pos;
+	if (iocb->ki_pos > i_size_read(file_inode(iocb->ki_filp))) {
+		ret = orangefs_revalidate_mapping(file_inode(iocb->ki_filp));
+		if (ret)
+			return ret;
+	}
 
-	return rc;
+	ret = generic_file_write_iter(iocb, iter);
+	return ret;
 }
 
-static ssize_t orangefs_file_write_iter(struct kiocb *iocb, struct iov_iter *iter)
+static int orangefs_getflags(struct inode *inode, unsigned long *uval)
 {
-	struct file *file = iocb->ki_filp;
-	loff_t pos;
-	ssize_t rc;
-
-	BUG_ON(iocb->private);
-
-	gossip_debug(GOSSIP_FILE_DEBUG, "orangefs_file_write_iter\n");
-
-	inode_lock(file->f_mapping->host);
-
-	/* Make sure generic_write_checks sees an up to date inode size. */
-	if (file->f_flags & O_APPEND) {
-		rc = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
-		    STATX_SIZE);
-		if (rc == -ESTALE)
-			rc = -EIO;
-		if (rc) {
-			gossip_err("%s: orangefs_inode_getattr failed, "
-			    "rc:%zd:.\n", __func__, rc);
-			goto out;
-		}
-	}
-
-	rc = generic_write_checks(iocb, iter);
-
-	if (rc <= 0) {
-		gossip_err("%s: generic_write_checks failed, rc:%zd:.\n",
-			   __func__, rc);
-		goto out;
-	}
-
-	/*
-	 * if we are appending, generic_write_checks would have updated
-	 * pos to the end of the file, so we will wait till now to set
-	 * pos...
-	 */
-	pos = iocb->ki_pos;
-
-	rc = do_readv_writev(ORANGEFS_IO_WRITE,
-			     file,
-			     &pos,
-			     iter);
-	if (rc < 0) {
-		gossip_err("%s: do_readv_writev failed, rc:%zd:.\n",
-			   __func__, rc);
-		goto out;
-	}
-
-	iocb->ki_pos = pos;
-	orangefs_stats.writes++;
-
-out:
+	__u64 val = 0;
+	int ret;
 
-	inode_unlock(file->f_mapping->host);
-	return rc;
+	ret = orangefs_inode_getxattr(inode,
+				      "user.pvfs2.meta_hint",
+				      &val, sizeof(val));
+	if (ret < 0 && ret != -ENODATA)
+		return ret;
+	else if (ret == -ENODATA)
+		val = 0;
+	*uval = val;
+	return 0;
 }
 
 /*
@@ -474,6 +378,7 @@ out:
  */
 static long orangefs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 {
+	struct inode *inode = file_inode(file);
 	int ret = -ENOTTY;
 	__u64 val = 0;
 	unsigned long uval;
@@ -487,20 +392,16 @@ static long orangefs_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 	 * and append flags
 	 */
 	if (cmd == FS_IOC_GETFLAGS) {
-		val = 0;
-		ret = orangefs_inode_getxattr(file_inode(file),
-					      "user.pvfs2.meta_hint",
-					      &val, sizeof(val));
-		if (ret < 0 && ret != -ENODATA)
+		ret = orangefs_getflags(inode, &uval);
+		if (ret)
 			return ret;
-		else if (ret == -ENODATA)
-			val = 0;
-		uval = val;
 		gossip_debug(GOSSIP_FILE_DEBUG,
 			     "orangefs_ioctl: FS_IOC_GETFLAGS: %llu\n",
 			     (unsigned long long)uval);
 		return put_user(uval, (int __user *)arg);
 	} else if (cmd == FS_IOC_SETFLAGS) {
+		unsigned long old_uval;
+
 		ret = 0;
 		if (get_user(uval, (int __user *)arg))
 			return -EFAULT;
@@ -516,11 +417,17 @@ static long orangefs_ioctl(struct file *file, unsigned int cmd, unsigned long ar
 			gossip_err("orangefs_ioctl: the FS_IOC_SETFLAGS only supports setting one of FS_IMMUTABLE_FL|FS_APPEND_FL|FS_NOATIME_FL\n");
 			return -EINVAL;
 		}
+		ret = orangefs_getflags(inode, &old_uval);
+		if (ret)
+			return ret;
+		ret = vfs_ioc_setflags_prepare(inode, old_uval, uval);
+		if (ret)
+			return ret;
 		val = uval;
 		gossip_debug(GOSSIP_FILE_DEBUG,
 			     "orangefs_ioctl: FS_IOC_SETFLAGS: %llu\n",
 			     (unsigned long long)val);
-		ret = orangefs_inode_setxattr(file_inode(file),
+		ret = orangefs_inode_setxattr(inode,
 					      "user.pvfs2.meta_hint",
 					      &val, sizeof(val), 0);
 	}
@@ -532,14 +439,13 @@ static vm_fault_t orangefs_fault(struct vm_fault *vmf)
 {
 	struct file *file = vmf->vma->vm_file;
 	int ret;
-
-	ret = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
-	    STATX_SIZE);
+	ret = orangefs_inode_getattr(file->f_mapping->host,
+	    ORANGEFS_GETATTR_SIZE);
 	if (ret == -ESTALE)
 		ret = -EIO;
 	if (ret) {
-		gossip_err("%s: orangefs_inode_getattr failed, ret:%d:.\n",
-				__func__, ret);
+		gossip_err("%s: orangefs_inode_getattr failed, "
+		    "ret:%d:.\n", __func__, ret);
 		return VM_FAULT_SIGBUS;
 	}
 	return filemap_fault(vmf);
@@ -548,7 +454,7 @@ static vm_fault_t orangefs_fault(struct vm_fault *vmf)
 static const struct vm_operations_struct orangefs_file_vm_ops = {
 	.fault = orangefs_fault,
 	.map_pages = filemap_map_pages,
-	.page_mkwrite = filemap_page_mkwrite,
+	.page_mkwrite = orangefs_page_mkwrite,
 };
 
 /*
@@ -556,15 +462,18 @@ static const struct vm_operations_struct orangefs_file_vm_ops = {
  */
 static int orangefs_file_mmap(struct file *file, struct vm_area_struct *vma)
 {
+	int ret;
+
+	ret = orangefs_revalidate_mapping(file_inode(file));
+	if (ret)
+		return ret;
+
 	gossip_debug(GOSSIP_FILE_DEBUG,
 		     "orangefs_file_mmap: called on %s\n",
 		     (file ?
 			(char *)file->f_path.dentry->d_name.name :
 			(char *)"Unknown"));
 
-	if ((vma->vm_flags & VM_SHARED) && (vma->vm_flags & VM_MAYWRITE))
-		return -EINVAL;
-
 	/* set the sequential readahead hint */
 	vma->vm_flags |= VM_SEQ_READ;
 	vma->vm_flags &= ~VM_RAND_READ;
@@ -604,8 +513,7 @@ static int orangefs_file_release(struct inode *inode, struct file *file)
 			gossip_debug(GOSSIP_INODE_DEBUG,
 			    "flush_racache finished\n");
 		}
-		truncate_inode_pages(file_inode(file)->i_mapping,
-				     0);
+
 	}
 	return 0;
 }
@@ -623,6 +531,11 @@ static int orangefs_fsync(struct file *file,
 		ORANGEFS_I(file_inode(file));
 	struct orangefs_kernel_op_s *new_op = NULL;
 
+	ret = filemap_write_and_wait_range(file_inode(file)->i_mapping,
+	    start, end);
+	if (ret < 0)
+		return ret;
+
 	new_op = op_alloc(ORANGEFS_VFS_OP_FSYNC);
 	if (!new_op)
 		return -ENOMEM;
@@ -660,8 +573,8 @@ static loff_t orangefs_file_llseek(struct file *file, loff_t offset, int origin)
 		 * NOTE: We are only interested in file size here,
 		 * so we set mask accordingly.
 		 */
-		ret = orangefs_inode_getattr(file->f_mapping->host, 0, 1,
-		    STATX_SIZE);
+		ret = orangefs_inode_getattr(file->f_mapping->host,
+		    ORANGEFS_GETATTR_SIZE);
 		if (ret == -ESTALE)
 			ret = -EIO;
 		if (ret) {
@@ -704,6 +617,42 @@ static int orangefs_lock(struct file *filp, int cmd, struct file_lock *fl)
 	return rc;
 }
 
+static int orangefs_file_open(struct inode * inode, struct file *file)
+{
+	file->private_data = NULL;
+	return generic_file_open(inode, file);
+}
+
+static int orangefs_flush(struct file *file, fl_owner_t id)
+{
+	/*
+	 * This is vfs_fsync_range(file, 0, LLONG_MAX, 0) without the
+	 * service_operation in orangefs_fsync.
+	 *
+	 * Do not send fsync to OrangeFS server on a close.  Do send fsync
+	 * on an explicit fsync call.  This duplicates historical OrangeFS
+	 * behavior.
+	 */
+	struct inode *inode = file->f_mapping->host;
+	int r;
+
+	kfree(file->private_data);
+	file->private_data = NULL;
+
+	if (inode->i_state & I_DIRTY_TIME) {
+		spin_lock(&inode->i_lock);
+		inode->i_state &= ~I_DIRTY_TIME;
+		spin_unlock(&inode->i_lock);
+		mark_inode_dirty_sync(inode);
+	}
+
+	r = filemap_write_and_wait_range(file->f_mapping, 0, LLONG_MAX);
+	if (r > 0)
+		return 0;
+	else
+		return r;
+}
+
 /** ORANGEFS implementation of VFS file operations */
 const struct file_operations orangefs_file_operations = {
 	.llseek		= orangefs_file_llseek,
@@ -712,7 +661,8 @@ const struct file_operations orangefs_file_operations = {
 	.lock		= orangefs_lock,
 	.unlocked_ioctl	= orangefs_ioctl,
 	.mmap		= orangefs_file_mmap,
-	.open		= generic_file_open,
+	.open		= orangefs_file_open,
+	.flush		= orangefs_flush,
 	.release	= orangefs_file_release,
 	.fsync		= orangefs_fsync,
 };
diff --git a/fs/orangefs/inode.c b/fs/orangefs/inode.c
index f038235c64bd..0c337d8bdaab 100644
--- a/fs/orangefs/inode.c
+++ b/fs/orangefs/inode.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
  * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
  *
  * See COPYING in top-level directory.
  */
@@ -14,40 +15,312 @@
 #include "orangefs-kernel.h"
 #include "orangefs-bufmap.h"
 
-static int read_one_page(struct page *page)
+static int orangefs_writepage_locked(struct page *page,
+    struct writeback_control *wbc)
 {
-	int ret;
-	int max_block;
-	ssize_t bytes_read = 0;
 	struct inode *inode = page->mapping->host;
-	const __u32 blocksize = PAGE_SIZE;
-	const __u32 blockbits = PAGE_SHIFT;
-	struct iov_iter to;
-	struct bio_vec bv = {.bv_page = page, .bv_len = PAGE_SIZE};
+	struct orangefs_write_range *wr = NULL;
+	struct iov_iter iter;
+	struct bio_vec bv;
+	size_t len, wlen;
+	ssize_t ret;
+	loff_t off;
+
+	set_page_writeback(page);
+
+	len = i_size_read(inode);
+	if (PagePrivate(page)) {
+		wr = (struct orangefs_write_range *)page_private(page);
+		WARN_ON(wr->pos >= len);
+		off = wr->pos;
+		if (off + wr->len > len)
+			wlen = len - off;
+		else
+			wlen = wr->len;
+	} else {
+		WARN_ON(1);
+		off = page_offset(page);
+		if (off + PAGE_SIZE > len)
+			wlen = len - off;
+		else
+			wlen = PAGE_SIZE;
+	}
+	/* Should've been handled in orangefs_invalidatepage. */
+	WARN_ON(off == len || off + wlen > len);
+
+	bv.bv_page = page;
+	bv.bv_len = wlen;
+	bv.bv_offset = off % PAGE_SIZE;
+	WARN_ON(wlen == 0);
+	iov_iter_bvec(&iter, WRITE, &bv, 1, wlen);
+
+	ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, wlen,
+	    len, wr, NULL);
+	if (ret < 0) {
+		SetPageError(page);
+		mapping_set_error(page->mapping, ret);
+	} else {
+		ret = 0;
+	}
+	if (wr) {
+		kfree(wr);
+		set_page_private(page, 0);
+		ClearPagePrivate(page);
+		put_page(page);
+	}
+	return ret;
+}
 
-	iov_iter_bvec(&to, READ, &bv, 1, PAGE_SIZE);
+static int orangefs_writepage(struct page *page, struct writeback_control *wbc)
+{
+	int ret;
+	ret = orangefs_writepage_locked(page, wbc);
+	unlock_page(page);
+	end_page_writeback(page);
+	return ret;
+}
 
-	gossip_debug(GOSSIP_INODE_DEBUG,
-		    "orangefs_readpage called with page %p\n",
-		     page);
+struct orangefs_writepages {
+	loff_t off;
+	size_t len;
+	kuid_t uid;
+	kgid_t gid;
+	int maxpages;
+	int npages;
+	struct page **pages;
+	struct bio_vec *bv;
+};
+
+static int orangefs_writepages_work(struct orangefs_writepages *ow,
+    struct writeback_control *wbc)
+{
+	struct inode *inode = ow->pages[0]->mapping->host;
+	struct orangefs_write_range *wrp, wr;
+	struct iov_iter iter;
+	ssize_t ret;
+	size_t len;
+	loff_t off;
+	int i;
+
+	len = i_size_read(inode);
+
+	for (i = 0; i < ow->npages; i++) {
+		set_page_writeback(ow->pages[i]);
+		ow->bv[i].bv_page = ow->pages[i];
+		ow->bv[i].bv_len = min(page_offset(ow->pages[i]) + PAGE_SIZE,
+		    ow->off + ow->len) -
+		    max(ow->off, page_offset(ow->pages[i]));
+		if (i == 0)
+			ow->bv[i].bv_offset = ow->off -
+			    page_offset(ow->pages[i]);
+		else
+			ow->bv[i].bv_offset = 0;
+	}
+	iov_iter_bvec(&iter, WRITE, ow->bv, ow->npages, ow->len);
+
+	WARN_ON(ow->off >= len);
+	if (ow->off + ow->len > len)
+		ow->len = len - ow->off;
+
+	off = ow->off;
+	wr.uid = ow->uid;
+	wr.gid = ow->gid;
+	ret = wait_for_direct_io(ORANGEFS_IO_WRITE, inode, &off, &iter, ow->len,
+	    0, &wr, NULL);
+	if (ret < 0) {
+		for (i = 0; i < ow->npages; i++) {
+			SetPageError(ow->pages[i]);
+			mapping_set_error(ow->pages[i]->mapping, ret);
+			if (PagePrivate(ow->pages[i])) {
+				wrp = (struct orangefs_write_range *)
+				    page_private(ow->pages[i]);
+				ClearPagePrivate(ow->pages[i]);
+				put_page(ow->pages[i]);
+				kfree(wrp);
+			}
+			end_page_writeback(ow->pages[i]);
+			unlock_page(ow->pages[i]);
+		}
+	} else {
+		ret = 0;
+		for (i = 0; i < ow->npages; i++) {
+			if (PagePrivate(ow->pages[i])) {
+				wrp = (struct orangefs_write_range *)
+				    page_private(ow->pages[i]);
+				ClearPagePrivate(ow->pages[i]);
+				put_page(ow->pages[i]);
+				kfree(wrp);
+			}
+			end_page_writeback(ow->pages[i]);
+			unlock_page(ow->pages[i]);
+		}
+	}
+	return ret;
+}
+
+static int orangefs_writepages_callback(struct page *page,
+    struct writeback_control *wbc, void *data)
+{
+	struct orangefs_writepages *ow = data;
+	struct orangefs_write_range *wr;
+	int ret;
+
+	if (!PagePrivate(page)) {
+		unlock_page(page);
+		/* It's not private so there's nothing to write, right? */
+		printk("writepages_callback not private!\n");
+		BUG();
+		return 0;
+	}
+	wr = (struct orangefs_write_range *)page_private(page);
+
+	ret = -1;
+	if (ow->npages == 0) {
+		ow->off = wr->pos;
+		ow->len = wr->len;
+		ow->uid = wr->uid;
+		ow->gid = wr->gid;
+		ow->pages[ow->npages++] = page;
+		ret = 0;
+		goto done;
+	}
+	if (!uid_eq(ow->uid, wr->uid) || !gid_eq(ow->gid, wr->gid)) {
+		orangefs_writepages_work(ow, wbc);
+		ow->npages = 0;
+		ret = -1;
+		goto done;
+	}
+	if (ow->off + ow->len == wr->pos) {
+		ow->len += wr->len;
+		ow->pages[ow->npages++] = page;
+		ret = 0;
+		goto done;
+	}
+done:
+	if (ret == -1) {
+		if (ow->npages) {
+			orangefs_writepages_work(ow, wbc);
+			ow->npages = 0;
+		}
+		ret = orangefs_writepage_locked(page, wbc);
+		mapping_set_error(page->mapping, ret);
+		unlock_page(page);
+		end_page_writeback(page);
+	} else {
+		if (ow->npages == ow->maxpages) {
+			orangefs_writepages_work(ow, wbc);
+			ow->npages = 0;
+		}
+	}
+	return ret;
+}
+
+static int orangefs_writepages(struct address_space *mapping,
+    struct writeback_control *wbc)
+{
+	struct orangefs_writepages *ow;
+	struct blk_plug plug;
+	int ret;
+	ow = kzalloc(sizeof(struct orangefs_writepages), GFP_KERNEL);
+	if (!ow)
+		return -ENOMEM;
+	ow->maxpages = orangefs_bufmap_size_query()/PAGE_SIZE;
+	ow->pages = kcalloc(ow->maxpages, sizeof(struct page *), GFP_KERNEL);
+	if (!ow->pages) {
+		kfree(ow);
+		return -ENOMEM;
+	}
+	ow->bv = kcalloc(ow->maxpages, sizeof(struct bio_vec), GFP_KERNEL);
+	if (!ow->bv) {
+		kfree(ow->pages);
+		kfree(ow);
+		return -ENOMEM;
+	}
+	blk_start_plug(&plug);
+	ret = write_cache_pages(mapping, wbc, orangefs_writepages_callback, ow);
+	if (ow->npages)
+		ret = orangefs_writepages_work(ow, wbc);
+	blk_finish_plug(&plug);
+	kfree(ow->pages);
+	kfree(ow->bv);
+	kfree(ow);
+	return ret;
+}
 
-	max_block = ((inode->i_size / blocksize) + 1);
+static int orangefs_launder_page(struct page *);
 
-	if (page->index < max_block) {
-		loff_t blockptr_offset = (((loff_t) page->index) << blockbits);
+static int orangefs_readpage(struct file *file, struct page *page)
+{
+	struct inode *inode = page->mapping->host;
+	struct iov_iter iter;
+	struct bio_vec bv;
+	ssize_t ret;
+	loff_t off; /* offset into this page */
+	pgoff_t index; /* which page */
+	struct page *next_page;
+	char *kaddr;
+	struct orangefs_read_options *ro = file->private_data;
+	loff_t read_size;
+	loff_t roundedup;
+	int buffer_index = -1; /* orangefs shared memory slot */
+	int slot_index;   /* index into slot */
+	int remaining;
 
-		bytes_read = orangefs_inode_read(inode,
-						 &to,
-						 &blockptr_offset,
-						 inode->i_size);
+	/*
+	 * If they set some miniscule size for "count" in read(2)
+	 * (for example) then let's try to read a page, or the whole file
+	 * if it is smaller than a page. Once "count" goes over a page
+	 * then lets round up to the highest page size multiple that is
+	 * less than or equal to "count" and do that much orangefs IO and
+	 * try to fill as many pages as we can from it.
+	 *
+	 * "count" should be represented in ro->blksiz.
+	 *
+	 * inode->i_size = file size.
+	 */
+	if (ro) {
+		if (ro->blksiz < PAGE_SIZE) {
+			if (inode->i_size < PAGE_SIZE)
+				read_size = inode->i_size;
+			else
+				read_size = PAGE_SIZE;
+		} else {
+			roundedup = ((PAGE_SIZE - 1) & ro->blksiz) ?
+				((ro->blksiz + PAGE_SIZE) & ~(PAGE_SIZE -1)) :
+				ro->blksiz;
+			if (roundedup > inode->i_size)
+				read_size = inode->i_size;
+			else
+				read_size = roundedup;
+
+		}
+	} else {
+		read_size = PAGE_SIZE;
 	}
+	if (!read_size)
+		read_size = PAGE_SIZE;
+
+	if (PageDirty(page))
+		orangefs_launder_page(page);
+
+	off = page_offset(page);
+	index = off >> PAGE_SHIFT;
+	bv.bv_page = page;
+	bv.bv_len = PAGE_SIZE;
+	bv.bv_offset = 0;
+	iov_iter_bvec(&iter, READ, &bv, 1, PAGE_SIZE);
+
+	ret = wait_for_direct_io(ORANGEFS_IO_READ, inode, &off, &iter,
+	    read_size, inode->i_size, NULL, &buffer_index);
+	remaining = ret;
 	/* this will only zero remaining unread portions of the page data */
-	iov_iter_zero(~0U, &to);
+	iov_iter_zero(~0U, &iter);
 	/* takes care of potential aliasing */
 	flush_dcache_page(page);
-	if (bytes_read < 0) {
-		ret = bytes_read;
+	if (ret < 0) {
 		SetPageError(page);
+		unlock_page(page);
+		goto out;
 	} else {
 		SetPageUptodate(page);
 		if (PageError(page))
@@ -56,96 +329,469 @@ static int read_one_page(struct page *page)
 	}
 	/* unlock the page after the ->readpage() routine completes */
 	unlock_page(page);
+
+	if (remaining > PAGE_SIZE) {
+		slot_index = 0;
+		while ((remaining - PAGE_SIZE) >= PAGE_SIZE) {
+			remaining -= PAGE_SIZE;
+			/*
+			 * It is an optimization to try and fill more than one
+			 * page... by now we've already gotten the single
+			 * page we were after, if stuff doesn't seem to
+			 * be going our way at this point just return
+			 * and hope for the best.
+			 *
+			 * If we look for pages and they're already there is
+			 * one reason to give up, and if they're not there
+			 * and we can't create them is another reason.
+			 */
+
+			index++;
+			slot_index++;
+			next_page = find_get_page(inode->i_mapping, index);
+			if (next_page) {
+				gossip_debug(GOSSIP_FILE_DEBUG,
+					"%s: found next page, quitting\n",
+					__func__);
+				put_page(next_page);
+				goto out;
+			}
+			next_page = find_or_create_page(inode->i_mapping,
+							index,
+							GFP_KERNEL);
+			/*
+			 * I've never hit this, leave it as a printk for
+			 * now so it will be obvious.
+			 */
+			if (!next_page) {
+				printk("%s: can't create next page, quitting\n",
+					__func__);
+				goto out;
+			}
+			kaddr = kmap_atomic(next_page);
+			orangefs_bufmap_page_fill(kaddr,
+						buffer_index,
+						slot_index);
+			kunmap_atomic(kaddr);
+			SetPageUptodate(next_page);
+			unlock_page(next_page);
+			put_page(next_page);
+		}
+	}
+
+out:
+	if (buffer_index != -1)
+		orangefs_bufmap_put(buffer_index);
 	return ret;
 }
 
-static int orangefs_readpage(struct file *file, struct page *page)
+static int orangefs_write_begin(struct file *file,
+    struct address_space *mapping,
+    loff_t pos, unsigned len, unsigned flags, struct page **pagep,
+    void **fsdata)
 {
-	return read_one_page(page);
+	struct orangefs_write_range *wr;
+	struct page *page;
+	pgoff_t index;
+	int ret;
+
+	index = pos >> PAGE_SHIFT;
+
+	page = grab_cache_page_write_begin(mapping, index, flags);
+	if (!page)
+		return -ENOMEM;
+
+	*pagep = page;
+
+	if (PageDirty(page) && !PagePrivate(page)) {
+		/*
+		 * Should be impossible.  If it happens, launder the page
+		 * since we don't know what's dirty.  This will WARN in
+		 * orangefs_writepage_locked.
+		 */
+		ret = orangefs_launder_page(page);
+		if (ret)
+			return ret;
+	}
+	if (PagePrivate(page)) {
+		struct orangefs_write_range *wr;
+		wr = (struct orangefs_write_range *)page_private(page);
+		if (wr->pos + wr->len == pos &&
+		    uid_eq(wr->uid, current_fsuid()) &&
+		    gid_eq(wr->gid, current_fsgid())) {
+			wr->len += len;
+			goto okay;
+		} else {
+			ret = orangefs_launder_page(page);
+			if (ret)
+				return ret;
+		}
+	}
+
+	wr = kmalloc(sizeof *wr, GFP_KERNEL);
+	if (!wr)
+		return -ENOMEM;
+
+	wr->pos = pos;
+	wr->len = len;
+	wr->uid = current_fsuid();
+	wr->gid = current_fsgid();
+	SetPagePrivate(page);
+	set_page_private(page, (unsigned long)wr);
+	get_page(page);
+okay:
+	return 0;
 }
 
-static int orangefs_readpages(struct file *file,
-			   struct address_space *mapping,
-			   struct list_head *pages,
-			   unsigned nr_pages)
+static int orangefs_write_end(struct file *file, struct address_space *mapping,
+    loff_t pos, unsigned len, unsigned copied, struct page *page, void *fsdata)
 {
-	int page_idx;
-	int ret;
+	struct inode *inode = page->mapping->host;
+	loff_t last_pos = pos + copied;
 
-	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_readpages called\n");
-
-	for (page_idx = 0; page_idx < nr_pages; page_idx++) {
-		struct page *page;
-
-		page = lru_to_page(pages);
-		list_del(&page->lru);
-		if (!add_to_page_cache(page,
-				       mapping,
-				       page->index,
-				       readahead_gfp_mask(mapping))) {
-			ret = read_one_page(page);
-			gossip_debug(GOSSIP_INODE_DEBUG,
-				"failure adding page to cache, read_one_page returned: %d\n",
-				ret);
-	      } else {
-			put_page(page);
-	      }
-	}
-	BUG_ON(!list_empty(pages));
-	return 0;
+	/*
+	 * No need to use i_size_read() here, the i_size
+	 * cannot change under us because we hold the i_mutex.
+	 */
+	if (last_pos > inode->i_size)
+		i_size_write(inode, last_pos);
+
+	/* zero the stale part of the page if we did a short copy */
+	if (!PageUptodate(page)) {
+		unsigned from = pos & (PAGE_SIZE - 1);
+		if (copied < len) {
+			zero_user(page, from + copied, len - copied);
+		}
+		/* Set fully written pages uptodate. */
+		if (pos == page_offset(page) &&
+		    (len == PAGE_SIZE || pos + len == inode->i_size)) {
+			zero_user_segment(page, from + copied, PAGE_SIZE);
+			SetPageUptodate(page);
+		}
+	}
+
+	set_page_dirty(page);
+	unlock_page(page);
+	put_page(page);
+
+	mark_inode_dirty_sync(file_inode(file));
+	return copied;
 }
 
 static void orangefs_invalidatepage(struct page *page,
 				 unsigned int offset,
 				 unsigned int length)
 {
-	gossip_debug(GOSSIP_INODE_DEBUG,
-		     "orangefs_invalidatepage called on page %p "
-		     "(offset is %u)\n",
-		     page,
-		     offset);
+	struct orangefs_write_range *wr;
+	wr = (struct orangefs_write_range *)page_private(page);
+
+	if (offset == 0 && length == PAGE_SIZE) {
+		kfree((struct orangefs_write_range *)page_private(page));
+		set_page_private(page, 0);
+		ClearPagePrivate(page);
+		put_page(page);
+		return;
+	/* write range entirely within invalidate range (or equal) */
+	} else if (page_offset(page) + offset <= wr->pos &&
+	    wr->pos + wr->len <= page_offset(page) + offset + length) {
+		kfree((struct orangefs_write_range *)page_private(page));
+		set_page_private(page, 0);
+		ClearPagePrivate(page);
+		put_page(page);
+		/* XXX is this right? only caller in fs */
+		cancel_dirty_page(page);
+		return;
+	/* invalidate range chops off end of write range */
+	} else if (wr->pos < page_offset(page) + offset &&
+	    wr->pos + wr->len <= page_offset(page) + offset + length &&
+	     page_offset(page) + offset < wr->pos + wr->len) {
+		size_t x;
+		x = wr->pos + wr->len - (page_offset(page) + offset);
+		WARN_ON(x > wr->len);
+		wr->len -= x;
+		wr->uid = current_fsuid();
+		wr->gid = current_fsgid();
+	/* invalidate range chops off beginning of write range */
+	} else if (page_offset(page) + offset <= wr->pos &&
+	    page_offset(page) + offset + length < wr->pos + wr->len &&
+	    wr->pos < page_offset(page) + offset + length) {
+		size_t x;
+		x = page_offset(page) + offset + length - wr->pos;
+		WARN_ON(x > wr->len);
+		wr->pos += x;
+		wr->len -= x;
+		wr->uid = current_fsuid();
+		wr->gid = current_fsgid();
+	/* invalidate range entirely within write range (punch hole) */
+	} else if (wr->pos < page_offset(page) + offset &&
+	    page_offset(page) + offset + length < wr->pos + wr->len) {
+		/* XXX what do we do here... should not WARN_ON */
+		WARN_ON(1);
+		/* punch hole */
+		/*
+		 * should we just ignore this and write it out anyway?
+		 * it hardly makes sense
+		 */
+		return;
+	/* non-overlapping ranges */
+	} else {
+		/* WARN if they do overlap */
+		if (!((page_offset(page) + offset + length <= wr->pos) ^
+		    (wr->pos + wr->len <= page_offset(page) + offset))) {
+			WARN_ON(1);
+			printk("invalidate range offset %llu length %u\n",
+			    page_offset(page) + offset, length);
+			printk("write range offset %llu length %zu\n",
+			    wr->pos, wr->len);
+		}
+		return;
+	}
 
-	ClearPageUptodate(page);
-	ClearPageMappedToDisk(page);
-	return;
+	/*
+	 * Above there are returns where wr is freed or where we WARN.
+	 * Thus the following runs if wr was modified above.
+	 */
 
+	orangefs_launder_page(page);
 }
 
 static int orangefs_releasepage(struct page *page, gfp_t foo)
 {
-	gossip_debug(GOSSIP_INODE_DEBUG,
-		     "orangefs_releasepage called on page %p\n",
-		     page);
-	return 0;
+	return !PagePrivate(page);
 }
 
-/*
- * Having a direct_IO entry point in the address_space_operations
- * struct causes the kernel to allows us to use O_DIRECT on
- * open. Nothing will ever call this thing, but in the future we
- * will need to be able to use O_DIRECT on open in order to support
- * AIO. Modeled after NFS, they do this too.
- */
+static void orangefs_freepage(struct page *page)
+{
+	if (PagePrivate(page)) {
+		kfree((struct orangefs_write_range *)page_private(page));
+		set_page_private(page, 0);
+		ClearPagePrivate(page);
+		put_page(page);
+	}
+}
+
+static int orangefs_launder_page(struct page *page)
+{
+	int r = 0;
+	struct writeback_control wbc = {
+		.sync_mode = WB_SYNC_ALL,
+		.nr_to_write = 0,
+	};
+	wait_on_page_writeback(page);
+	if (clear_page_dirty_for_io(page)) {
+		r = orangefs_writepage_locked(page, &wbc);
+		end_page_writeback(page);
+	}
+	return r;
+}
 
 static ssize_t orangefs_direct_IO(struct kiocb *iocb,
 				  struct iov_iter *iter)
 {
-	gossip_debug(GOSSIP_INODE_DEBUG,
-		     "orangefs_direct_IO: %pD\n",
-		     iocb->ki_filp);
+	/*
+	 * Comment from original do_readv_writev:
+	 * Common entry point for read/write/readv/writev
+	 * This function will dispatch it to either the direct I/O
+	 * or buffered I/O path depending on the mount options and/or
+	 * augmented/extended metadata attached to the file.
+	 * Note: File extended attributes override any mount options.
+	 */
+	struct file *file = iocb->ki_filp;
+	loff_t pos = iocb->ki_pos;
+	enum ORANGEFS_io_type type = iov_iter_rw(iter) == WRITE ?
+            ORANGEFS_IO_WRITE : ORANGEFS_IO_READ;
+	loff_t *offset = &pos;
+	struct inode *inode = file->f_mapping->host;
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_khandle *handle = &orangefs_inode->refn.khandle;
+	size_t count = iov_iter_count(iter);
+	ssize_t total_count = 0;
+	ssize_t ret = -EINVAL;
+	int i = 0;
+
+	gossip_debug(GOSSIP_FILE_DEBUG,
+		"%s-BEGIN(%pU): count(%d) after estimate_max_iovecs.\n",
+		__func__,
+		handle,
+		(int)count);
+
+	if (type == ORANGEFS_IO_WRITE) {
+		gossip_debug(GOSSIP_FILE_DEBUG,
+			     "%s(%pU): proceeding with offset : %llu, "
+			     "size %d\n",
+			     __func__,
+			     handle,
+			     llu(*offset),
+			     (int)count);
+	}
+
+	if (count == 0) {
+		ret = 0;
+		goto out;
+	}
 
-	return -EINVAL;
+	while (iov_iter_count(iter)) {
+		size_t each_count = iov_iter_count(iter);
+		size_t amt_complete;
+		i++;
+
+		/* how much to transfer in this loop iteration */
+		if (each_count > orangefs_bufmap_size_query())
+			each_count = orangefs_bufmap_size_query();
+
+		gossip_debug(GOSSIP_FILE_DEBUG,
+			     "%s(%pU): size of each_count(%d)\n",
+			     __func__,
+			     handle,
+			     (int)each_count);
+		gossip_debug(GOSSIP_FILE_DEBUG,
+			     "%s(%pU): BEFORE wait_for_io: offset is %d\n",
+			     __func__,
+			     handle,
+			     (int)*offset);
+
+		ret = wait_for_direct_io(type, inode, offset, iter,
+				each_count, 0, NULL, NULL);
+		gossip_debug(GOSSIP_FILE_DEBUG,
+			     "%s(%pU): return from wait_for_io:%d\n",
+			     __func__,
+			     handle,
+			     (int)ret);
+
+		if (ret < 0)
+			goto out;
+
+		*offset += ret;
+		total_count += ret;
+		amt_complete = ret;
+
+		gossip_debug(GOSSIP_FILE_DEBUG,
+			     "%s(%pU): AFTER wait_for_io: offset is %d\n",
+			     __func__,
+			     handle,
+			     (int)*offset);
+
+		/*
+		 * if we got a short I/O operations,
+		 * fall out and return what we got so far
+		 */
+		if (amt_complete < each_count)
+			break;
+	} /*end while */
+
+out:
+	if (total_count > 0)
+		ret = total_count;
+	if (ret > 0) {
+		if (type == ORANGEFS_IO_READ) {
+			file_accessed(file);
+		} else {
+			file_update_time(file);
+			if (*offset > i_size_read(inode))
+				i_size_write(inode, *offset);
+		}
+	}
+
+	gossip_debug(GOSSIP_FILE_DEBUG,
+		     "%s(%pU): Value(%d) returned.\n",
+		     __func__,
+		     handle,
+		     (int)ret);
+
+	return ret;
 }
 
 /** ORANGEFS2 implementation of address space operations */
 static const struct address_space_operations orangefs_address_operations = {
+	.writepage = orangefs_writepage,
 	.readpage = orangefs_readpage,
-	.readpages = orangefs_readpages,
+	.writepages = orangefs_writepages,
+	.set_page_dirty = __set_page_dirty_nobuffers,
+	.write_begin = orangefs_write_begin,
+	.write_end = orangefs_write_end,
 	.invalidatepage = orangefs_invalidatepage,
 	.releasepage = orangefs_releasepage,
+	.freepage = orangefs_freepage,
+	.launder_page = orangefs_launder_page,
 	.direct_IO = orangefs_direct_IO,
 };
 
+vm_fault_t orangefs_page_mkwrite(struct vm_fault *vmf)
+{
+	struct page *page = vmf->page;
+	struct inode *inode = file_inode(vmf->vma->vm_file);
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	unsigned long *bitlock = &orangefs_inode->bitlock;
+	vm_fault_t ret;
+	struct orangefs_write_range *wr;
+
+	sb_start_pagefault(inode->i_sb);
+
+	if (wait_on_bit(bitlock, 1, TASK_KILLABLE)) {
+		ret = VM_FAULT_RETRY;
+		goto out;
+	}
+
+	lock_page(page);
+	if (PageDirty(page) && !PagePrivate(page)) {
+		/*
+		 * Should be impossible.  If it happens, launder the page
+		 * since we don't know what's dirty.  This will WARN in
+		 * orangefs_writepage_locked.
+		 */
+		if (orangefs_launder_page(page)) {
+			ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
+			goto out;
+		}
+	}
+	if (PagePrivate(page)) {
+		wr = (struct orangefs_write_range *)page_private(page);
+		if (uid_eq(wr->uid, current_fsuid()) &&
+		    gid_eq(wr->gid, current_fsgid())) {
+			wr->pos = page_offset(page);
+			wr->len = PAGE_SIZE;
+			goto okay;
+		} else {
+			if (orangefs_launder_page(page)) {
+				ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
+				goto out;
+			}
+		}
+	}
+	wr = kmalloc(sizeof *wr, GFP_KERNEL);
+	if (!wr) {
+		ret = VM_FAULT_LOCKED|VM_FAULT_RETRY;
+		goto out;
+	}
+	wr->pos = page_offset(page);
+	wr->len = PAGE_SIZE;
+	wr->uid = current_fsuid();
+	wr->gid = current_fsgid();
+	SetPagePrivate(page);
+	set_page_private(page, (unsigned long)wr);
+	get_page(page);
+okay:
+
+	file_update_time(vmf->vma->vm_file);
+	if (page->mapping != inode->i_mapping) {
+		unlock_page(page);
+		ret = VM_FAULT_LOCKED|VM_FAULT_NOPAGE;
+		goto out;
+	}
+
+	/*
+	 * We mark the page dirty already here so that when freeze is in
+	 * progress, we are guaranteed that writeback during freezing will
+	 * see the dirty page and writeprotect it again.
+	 */
+	set_page_dirty(page);
+	wait_for_stable_page(page);
+	ret = VM_FAULT_LOCKED;
+out:
+	sb_end_pagefault(inode->i_sb);
+	return ret;
+}
+
 static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
 {
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
@@ -162,7 +808,7 @@ static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
 		     iattr->ia_size);
 
 	/* Ensure that we have a up to date size, so we know if it changed. */
-	ret = orangefs_inode_getattr(inode, 0, 1, STATX_SIZE);
+	ret = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_SIZE);
 	if (ret == -ESTALE)
 		ret = -EIO;
 	if (ret) {
@@ -172,7 +818,11 @@ static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
 	}
 	orig_size = i_size_read(inode);
 
-	truncate_setsize(inode, iattr->ia_size);
+	/* This is truncate_setsize in a different order. */
+	truncate_pagecache(inode, iattr->ia_size);
+	i_size_write(inode, iattr->ia_size);
+	if (iattr->ia_size > orig_size)
+		pagecache_isize_extended(inode, orig_size, iattr->ia_size);
 
 	new_op = op_alloc(ORANGEFS_VFS_OP_TRUNCATE);
 	if (!new_op)
@@ -202,22 +852,33 @@ static int orangefs_setattr_size(struct inode *inode, struct iattr *iattr)
 	return ret;
 }
 
-/*
- * Change attributes of an object referenced by dentry.
- */
-int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
+int __orangefs_setattr(struct inode *inode, struct iattr *iattr)
 {
-	int ret = -EINVAL;
-	struct inode *inode = dentry->d_inode;
-
-	gossip_debug(GOSSIP_INODE_DEBUG,
-		"%s: called on %pd\n",
-		__func__,
-		dentry);
+	int ret;
 
-	ret = setattr_prepare(dentry, iattr);
-	if (ret)
-		goto out;
+	if (iattr->ia_valid & ATTR_MODE) {
+		if (iattr->ia_mode & (S_ISVTX)) {
+			if (is_root_handle(inode)) {
+				/*
+				 * allow sticky bit to be set on root (since
+				 * it shows up that way by default anyhow),
+				 * but don't show it to the server
+				 */
+				iattr->ia_mode -= S_ISVTX;
+			} else {
+				gossip_debug(GOSSIP_UTILS_DEBUG,
+					     "User attempted to set sticky bit on non-root directory; returning EINVAL.\n");
+				ret = -EINVAL;
+				goto out;
+			}
+		}
+		if (iattr->ia_mode & (S_ISUID)) {
+			gossip_debug(GOSSIP_UTILS_DEBUG,
+				     "Attempting to set setuid bit (not supported); returning EINVAL.\n");
+			ret = -EINVAL;
+			goto out;
+		}
+	}
 
 	if (iattr->ia_valid & ATTR_SIZE) {
 		ret = orangefs_setattr_size(inode, iattr);
@@ -225,21 +886,51 @@ int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
 			goto out;
 	}
 
+again:
+	spin_lock(&inode->i_lock);
+	if (ORANGEFS_I(inode)->attr_valid) {
+		if (uid_eq(ORANGEFS_I(inode)->attr_uid, current_fsuid()) &&
+		    gid_eq(ORANGEFS_I(inode)->attr_gid, current_fsgid())) {
+			ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
+		} else {
+			spin_unlock(&inode->i_lock);
+			write_inode_now(inode, 1);
+			goto again;
+		}
+	} else {
+		ORANGEFS_I(inode)->attr_valid = iattr->ia_valid;
+		ORANGEFS_I(inode)->attr_uid = current_fsuid();
+		ORANGEFS_I(inode)->attr_gid = current_fsgid();
+	}
 	setattr_copy(inode, iattr);
+	spin_unlock(&inode->i_lock);
 	mark_inode_dirty(inode);
 
-	ret = orangefs_inode_setattr(inode, iattr);
-	gossip_debug(GOSSIP_INODE_DEBUG,
-		"%s: orangefs_inode_setattr returned %d\n",
-		__func__,
-		ret);
-
-	if (!ret && (iattr->ia_valid & ATTR_MODE))
+	if (iattr->ia_valid & ATTR_MODE)
 		/* change mod on a file that has ACLs */
 		ret = posix_acl_chmod(inode, inode->i_mode);
 
+	ret = 0;
 out:
-	gossip_debug(GOSSIP_INODE_DEBUG, "%s: ret:%d:\n", __func__, ret);
+	return ret;
+}
+
+/*
+ * Change attributes of an object referenced by dentry.
+ */
+int orangefs_setattr(struct dentry *dentry, struct iattr *iattr)
+{
+	int ret;
+	gossip_debug(GOSSIP_INODE_DEBUG, "__orangefs_setattr: called on %pd\n",
+	    dentry);
+	ret = setattr_prepare(dentry, iattr);
+	if (ret)
+	        goto out;
+	ret = __orangefs_setattr(d_inode(dentry), iattr);
+	sync_inode_metadata(d_inode(dentry), 1);
+out:
+	gossip_debug(GOSSIP_INODE_DEBUG, "orangefs_setattr: returning %d\n",
+	    ret);
 	return ret;
 }
 
@@ -253,19 +944,17 @@ int orangefs_getattr(const struct path *path, struct kstat *stat,
 	struct inode *inode = path->dentry->d_inode;
 
 	gossip_debug(GOSSIP_INODE_DEBUG,
-		     "orangefs_getattr: called on %pd\n",
-		     path->dentry);
+		     "orangefs_getattr: called on %pd mask %u\n",
+		     path->dentry, request_mask);
 
-	ret = orangefs_inode_getattr(inode, 0, 0, request_mask);
+	ret = orangefs_inode_getattr(inode,
+	    request_mask & STATX_SIZE ? ORANGEFS_GETATTR_SIZE : 0);
 	if (ret == 0) {
 		generic_fillattr(inode, stat);
 
 		/* override block size reported to stat */
-		if (request_mask & STATX_SIZE)
-			stat->result_mask = STATX_BASIC_STATS;
-		else
-			stat->result_mask = STATX_BASIC_STATS &
-			    ~STATX_SIZE;
+		if (!(request_mask & STATX_SIZE))
+			stat->result_mask &= ~STATX_SIZE;
 
 		stat->attributes_mask = STATX_ATTR_IMMUTABLE |
 		    STATX_ATTR_APPEND;
@@ -287,7 +976,7 @@ int orangefs_permission(struct inode *inode, int mask)
 	gossip_debug(GOSSIP_INODE_DEBUG, "%s: refreshing\n", __func__);
 
 	/* Make sure the permission (and other common attrs) are up to date. */
-	ret = orangefs_inode_getattr(inode, 0, 0, STATX_MODE);
+	ret = orangefs_inode_getattr(inode, 0);
 	if (ret < 0)
 		return ret;
 
@@ -307,7 +996,7 @@ int orangefs_update_time(struct inode *inode, struct timespec64 *time, int flags
 		iattr.ia_valid |= ATTR_CTIME;
 	if (flags & S_MTIME)
 		iattr.ia_valid |= ATTR_MTIME;
-	return orangefs_inode_setattr(inode, &iattr);
+	return __orangefs_setattr(inode, &iattr);
 }
 
 /* ORANGEFS2 implementation of VFS inode operations for files */
@@ -367,6 +1056,10 @@ static int orangefs_set_inode(struct inode *inode, void *data)
 	struct orangefs_object_kref *ref = (struct orangefs_object_kref *) data;
 	ORANGEFS_I(inode)->refn.fs_id = ref->fs_id;
 	ORANGEFS_I(inode)->refn.khandle = ref->khandle;
+	ORANGEFS_I(inode)->attr_valid = 0;
+	hash_init(ORANGEFS_I(inode)->xattr_cache);
+	ORANGEFS_I(inode)->mapping_time = jiffies - 1;
+	ORANGEFS_I(inode)->bitlock = 0;
 	return 0;
 }
 
@@ -412,7 +1105,7 @@ struct inode *orangefs_iget(struct super_block *sb,
 	if (!(inode->i_state & I_NEW))
 		return inode;
 
-	error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
+	error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
 	if (error) {
 		iget_failed(inode);
 		return ERR_PTR(error);
@@ -457,17 +1150,11 @@ struct inode *orangefs_new_inode(struct super_block *sb, struct inode *dir,
 	orangefs_set_inode(inode, ref);
 	inode->i_ino = hash;	/* needed for stat etc */
 
-	error = orangefs_inode_getattr(inode, 1, 1, STATX_ALL);
+	error = orangefs_inode_getattr(inode, ORANGEFS_GETATTR_NEW);
 	if (error)
 		goto out_iput;
 
 	orangefs_init_iops(inode);
-
-	inode->i_mode = mode;
-	inode->i_uid = current_fsuid();
-	inode->i_gid = current_fsgid();
-	inode->i_atime = inode->i_mtime = inode->i_ctime = current_time(inode);
-	inode->i_size = PAGE_SIZE;
 	inode->i_rdev = dev;
 
 	error = insert_inode_locked4(inode, hash, orangefs_test_inode, ref);
diff --git a/fs/orangefs/namei.c b/fs/orangefs/namei.c
index c8676c996249..1dd710e5f376 100644
--- a/fs/orangefs/namei.c
+++ b/fs/orangefs/namei.c
@@ -76,19 +76,16 @@ static int orangefs_create(struct inode *dir,
 
 	d_instantiate_new(dentry, inode);
 	orangefs_set_timeout(dentry);
-	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
-	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "%s: dentry instantiated for %pd\n",
 		     __func__,
 		     dentry);
 
-	dir->i_mtime = dir->i_ctime = current_time(dir);
 	memset(&iattr, 0, sizeof iattr);
-	iattr.ia_valid |= ATTR_MTIME;
-	orangefs_inode_setattr(dir, &iattr);
-	mark_inode_dirty_sync(dir);
+	iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+	iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+	__orangefs_setattr(dir, &iattr);
 	ret = 0;
 out:
 	op_release(new_op);
@@ -210,11 +207,10 @@ static int orangefs_unlink(struct inode *dir, struct dentry *dentry)
 	if (!ret) {
 		drop_nlink(inode);
 
-		dir->i_mtime = dir->i_ctime = current_time(dir);
 		memset(&iattr, 0, sizeof iattr);
-		iattr.ia_valid |= ATTR_MTIME;
-		orangefs_inode_setattr(dir, &iattr);
-		mark_inode_dirty_sync(dir);
+		iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+		iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+		__orangefs_setattr(dir, &iattr);
 	}
 	return ret;
 }
@@ -291,19 +287,16 @@ static int orangefs_symlink(struct inode *dir,
 
 	d_instantiate_new(dentry, inode);
 	orangefs_set_timeout(dentry);
-	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
-	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Inode (Symlink) %pU -> %pd\n",
 		     get_khandle_from_ino(inode),
 		     dentry);
 
-	dir->i_mtime = dir->i_ctime = current_time(dir);
 	memset(&iattr, 0, sizeof iattr);
-	iattr.ia_valid |= ATTR_MTIME;
-	orangefs_inode_setattr(dir, &iattr);
-	mark_inode_dirty_sync(dir);
+	iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+	iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+	__orangefs_setattr(dir, &iattr);
 	ret = 0;
 out:
 	op_release(new_op);
@@ -360,8 +353,6 @@ static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 
 	d_instantiate_new(dentry, inode);
 	orangefs_set_timeout(dentry);
-	ORANGEFS_I(inode)->getattr_time = jiffies - 1;
-	ORANGEFS_I(inode)->getattr_mask = STATX_BASIC_STATS;
 
 	gossip_debug(GOSSIP_NAME_DEBUG,
 		     "Inode (Directory) %pU -> %pd\n",
@@ -372,11 +363,10 @@ static int orangefs_mkdir(struct inode *dir, struct dentry *dentry, umode_t mode
 	 * NOTE: we have no good way to keep nlink consistent for directories
 	 * across clients; keep constant at 1.
 	 */
-	dir->i_mtime = dir->i_ctime = current_time(dir);
 	memset(&iattr, 0, sizeof iattr);
-	iattr.ia_valid |= ATTR_MTIME;
-	orangefs_inode_setattr(dir, &iattr);
-	mark_inode_dirty_sync(dir);
+	iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+	iattr.ia_mtime = iattr.ia_ctime = current_time(dir);
+	__orangefs_setattr(dir, &iattr);
 out:
 	op_release(new_op);
 	return ret;
@@ -389,6 +379,7 @@ static int orangefs_rename(struct inode *old_dir,
 			unsigned int flags)
 {
 	struct orangefs_kernel_op_s *new_op;
+	struct iattr iattr;
 	int ret;
 
 	if (flags)
@@ -398,7 +389,10 @@ static int orangefs_rename(struct inode *old_dir,
 		     "orangefs_rename: called (%pd2 => %pd2) ct=%d\n",
 		     old_dentry, new_dentry, d_count(new_dentry));
 
-	ORANGEFS_I(new_dentry->d_parent->d_inode)->getattr_time = jiffies - 1;
+	memset(&iattr, 0, sizeof iattr);
+	iattr.ia_valid |= ATTR_MTIME | ATTR_CTIME;
+	iattr.ia_mtime = iattr.ia_ctime = current_time(new_dir);
+	__orangefs_setattr(new_dir, &iattr);
 
 	new_op = op_alloc(ORANGEFS_VFS_OP_RENAME);
 	if (!new_op)
diff --git a/fs/orangefs/orangefs-bufmap.c b/fs/orangefs/orangefs-bufmap.c
index 443bcd8c3c19..2bb916d68576 100644
--- a/fs/orangefs/orangefs-bufmap.c
+++ b/fs/orangefs/orangefs-bufmap.c
@@ -269,7 +269,7 @@ orangefs_bufmap_map(struct orangefs_bufmap *bufmap,
 
 	/* map the pages */
 	ret = get_user_pages_fast((unsigned long)user_desc->ptr,
-			     bufmap->page_count, 1, bufmap->page_array);
+			     bufmap->page_count, FOLL_WRITE, bufmap->page_array);
 
 	if (ret < 0)
 		return ret;
@@ -538,3 +538,16 @@ int orangefs_bufmap_copy_to_iovec(struct iov_iter *iter,
 	}
 	return 0;
 }
+
+void orangefs_bufmap_page_fill(void *page_to,
+				int buffer_index,
+				int slot_index)
+{
+	struct orangefs_bufmap_desc *from;
+	void *page_from;
+
+	from = &__orangefs_bufmap->desc_array[buffer_index];
+	page_from = kmap_atomic(from->page_array[slot_index]);
+	memcpy(page_to, page_from, PAGE_SIZE);
+	kunmap_atomic(page_from);
+}
diff --git a/fs/orangefs/orangefs-bufmap.h b/fs/orangefs/orangefs-bufmap.h
index c2c3c5a0eeab..75b2d2833af1 100644
--- a/fs/orangefs/orangefs-bufmap.h
+++ b/fs/orangefs/orangefs-bufmap.h
@@ -34,4 +34,6 @@ int orangefs_bufmap_copy_to_iovec(struct iov_iter *iter,
 			      int buffer_index,
 			      size_t size);
 
+void orangefs_bufmap_page_fill(void *kaddr, int buffer_index, int slot_index);
+
 #endif /* __ORANGEFS_BUFMAP_H */
diff --git a/fs/orangefs/orangefs-debugfs.c b/fs/orangefs/orangefs-debugfs.c
index 0732cb08173e..25543a966c48 100644
--- a/fs/orangefs/orangefs-debugfs.c
+++ b/fs/orangefs/orangefs-debugfs.c
@@ -64,7 +64,7 @@ struct client_debug_mask {
 	__u64 mask2;
 };
 
-static int orangefs_kernel_debug_init(void);
+static void orangefs_kernel_debug_init(void);
 
 static int orangefs_debug_help_open(struct inode *, struct file *);
 static void *help_start(struct seq_file *, loff_t *);
@@ -99,7 +99,6 @@ static char *debug_help_string;
 static char client_debug_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 static char client_debug_array_string[ORANGEFS_MAX_DEBUG_STRING_LEN];
 
-static struct dentry *help_file_dentry;
 static struct dentry *client_debug_dentry;
 static struct dentry *debug_dir;
 
@@ -151,10 +150,8 @@ static DEFINE_MUTEX(orangefs_help_file_lock);
  * initialize kmod debug operations, create orangefs debugfs dir and
  * ORANGEFS_KMOD_DEBUG_HELP_FILE.
  */
-int orangefs_debugfs_init(int debug_mask)
+void orangefs_debugfs_init(int debug_mask)
 {
-	int rc = -ENOMEM;
-
 	/* convert input debug mask to a 64-bit unsigned integer */
         orangefs_gossip_debug_mask = (unsigned long long)debug_mask;
 
@@ -183,37 +180,21 @@ int orangefs_debugfs_init(int debug_mask)
 		(unsigned long long)orangefs_gossip_debug_mask);
 
 	debug_dir = debugfs_create_dir("orangefs", NULL);
-	if (!debug_dir) {
-		pr_info("%s: debugfs_create_dir failed.\n", __func__);
-		goto out;
-	}
 
-	help_file_dentry = debugfs_create_file(ORANGEFS_KMOD_DEBUG_HELP_FILE,
-				  0444,
-				  debug_dir,
-				  debug_help_string,
-				  &debug_help_fops);
-	if (!help_file_dentry) {
-		pr_info("%s: debugfs_create_file failed.\n", __func__);
-		goto out;
-	}
+	debugfs_create_file(ORANGEFS_KMOD_DEBUG_HELP_FILE, 0444, debug_dir,
+			    debug_help_string, &debug_help_fops);
 
 	orangefs_debug_disabled = 0;
 
-	rc = orangefs_kernel_debug_init();
-
-out:
-
-	return rc;
+	orangefs_kernel_debug_init();
 }
 
 /*
  * initialize the kernel-debug file.
  */
-static int orangefs_kernel_debug_init(void)
+static void orangefs_kernel_debug_init(void)
 {
 	int rc = -ENOMEM;
-	struct dentry *ret;
 	char *k_buffer = NULL;
 
 	gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: start\n", __func__);
@@ -230,24 +211,11 @@ static int orangefs_kernel_debug_init(void)
 		pr_info("%s: overflow 1!\n", __func__);
 	}
 
-	ret = debugfs_create_file(ORANGEFS_KMOD_DEBUG_FILE,
-				  0444,
-				  debug_dir,
-				  k_buffer,
-				  &kernel_debug_fops);
-	if (!ret) {
-		pr_info("%s: failed to create %s.\n",
-			__func__,
-			ORANGEFS_KMOD_DEBUG_FILE);
-		goto out;
-	}
-
-	rc = 0;
+	debugfs_create_file(ORANGEFS_KMOD_DEBUG_FILE, 0444, debug_dir, k_buffer,
+			    &kernel_debug_fops);
 
 out:
-
 	gossip_debug(GOSSIP_DEBUGFS_DEBUG, "%s: rc:%d:\n", __func__, rc);
-	return rc;
 }
 
 
@@ -353,12 +321,6 @@ static int orangefs_client_debug_init(void)
 						  debug_dir,
 						  c_buffer,
 						  &kernel_debug_fops);
-	if (!client_debug_dentry) {
-		pr_info("%s: failed to create updated %s.\n",
-			__func__,
-			ORANGEFS_CLIENT_DEBUG_FILE);
-		goto out;
-	}
 
 	rc = 0;
 
@@ -963,7 +925,7 @@ int orangefs_debugfs_new_client_mask(void __user *arg)
 	return ret;
 }
 
-int orangefs_debugfs_new_client_string(void __user *arg) 
+int orangefs_debugfs_new_client_string(void __user *arg)
 {
 	int ret;
 
@@ -1016,7 +978,7 @@ int orangefs_debugfs_new_client_string(void __user *arg)
 	return 0;
 }
 
-int orangefs_debugfs_new_debug(void __user *arg) 
+int orangefs_debugfs_new_debug(void __user *arg)
 {
 	struct dev_mask_info_s mask_info = {0};
 	int ret;
diff --git a/fs/orangefs/orangefs-debugfs.h b/fs/orangefs/orangefs-debugfs.h
index 51147f9ce3d6..502f6dedccde 100644
--- a/fs/orangefs/orangefs-debugfs.h
+++ b/fs/orangefs/orangefs-debugfs.h
@@ -1,5 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0 */
-int orangefs_debugfs_init(int);
+void orangefs_debugfs_init(int);
 void orangefs_debugfs_cleanup(void);
 int orangefs_prepare_debugfs_help_string(int);
 int orangefs_debugfs_new_client_mask(void __user *);
diff --git a/fs/orangefs/orangefs-kernel.h b/fs/orangefs/orangefs-kernel.h
index 17b24ad6b264..572dd29fbd54 100644
--- a/fs/orangefs/orangefs-kernel.h
+++ b/fs/orangefs/orangefs-kernel.h
@@ -51,6 +51,7 @@
 #include <linux/rwsem.h>
 #include <linux/xattr.h>
 #include <linux/exportfs.h>
+#include <linux/hashtable.h>
 
 #include <asm/unaligned.h>
 
@@ -192,7 +193,13 @@ struct orangefs_inode_s {
 	sector_t last_failed_block_index_read;
 
 	unsigned long getattr_time;
-	u32 getattr_mask;
+	unsigned long mapping_time;
+	int attr_valid;
+	kuid_t attr_uid;
+	kgid_t attr_gid;
+	unsigned long bitlock;
+
+	DECLARE_HASHTABLE(xattr_cache, 4);
 };
 
 /* per superblock private orangefs info */
@@ -217,6 +224,25 @@ struct orangefs_stats {
 	unsigned long writes;
 };
 
+struct orangefs_cached_xattr {
+	struct hlist_node node;
+	char key[ORANGEFS_MAX_XATTR_NAMELEN];
+	char val[ORANGEFS_MAX_XATTR_VALUELEN];
+	ssize_t length;
+	unsigned long timeout;
+};
+
+struct orangefs_write_range {
+	loff_t pos;
+	size_t len;
+	kuid_t uid;
+	kgid_t gid;
+};
+
+struct orangefs_read_options {
+	ssize_t blksiz;
+};
+
 extern struct orangefs_stats orangefs_stats;
 
 /*
@@ -329,13 +355,15 @@ void fsid_key_table_finalize(void);
 /*
  * defined in inode.c
  */
+vm_fault_t orangefs_page_mkwrite(struct vm_fault *);
 struct inode *orangefs_new_inode(struct super_block *sb,
 			      struct inode *dir,
 			      int mode,
 			      dev_t dev,
 			      struct orangefs_object_kref *ref);
 
-int orangefs_setattr(struct dentry *dentry, struct iattr *iattr);
+int __orangefs_setattr(struct inode *, struct iattr *);
+int orangefs_setattr(struct dentry *, struct iattr *);
 
 int orangefs_getattr(const struct path *path, struct kstat *stat,
 		     u32 request_mask, unsigned int flags);
@@ -355,11 +383,6 @@ ssize_t orangefs_listxattr(struct dentry *dentry, char *buffer, size_t size);
 struct inode *orangefs_iget(struct super_block *sb,
 			 struct orangefs_object_kref *ref);
 
-ssize_t orangefs_inode_read(struct inode *inode,
-			    struct iov_iter *iter,
-			    loff_t *offset,
-			    loff_t readahead_size);
-
 /*
  * defined in devorangefs-req.c
  */
@@ -371,6 +394,15 @@ int is_daemon_in_service(void);
 bool __is_daemon_in_service(void);
 
 /*
+ * defined in file.c
+ */
+int orangefs_revalidate_mapping(struct inode *);
+ssize_t wait_for_direct_io(enum ORANGEFS_io_type, struct inode *, loff_t *,
+    struct iov_iter *, size_t, loff_t, struct orangefs_write_range *, int *);
+ssize_t do_readv_writev(enum ORANGEFS_io_type, struct file *, loff_t *,
+    struct iov_iter *);
+
+/*
  * defined in orangefs-utils.c
  */
 __s32 fsid_of_op(struct orangefs_kernel_op_s *op);
@@ -386,12 +418,14 @@ int orangefs_inode_setxattr(struct inode *inode,
 			 size_t size,
 			 int flags);
 
-int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
-    u32 request_mask);
+#define ORANGEFS_GETATTR_NEW 1
+#define ORANGEFS_GETATTR_SIZE 2
+
+int orangefs_inode_getattr(struct inode *, int);
 
 int orangefs_inode_check_changed(struct inode *inode);
 
-int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr);
+int orangefs_inode_setattr(struct inode *inode);
 
 bool orangefs_cancel_op_in_progress(struct orangefs_kernel_op_s *op);
 
@@ -400,6 +434,7 @@ int orangefs_normalize_to_errno(__s32 error_code);
 extern struct mutex orangefs_request_mutex;
 extern int op_timeout_secs;
 extern int slot_timeout_secs;
+extern int orangefs_cache_timeout_msecs;
 extern int orangefs_dcache_timeout_msecs;
 extern int orangefs_getattr_timeout_msecs;
 extern struct list_head orangefs_superblocks;
@@ -426,6 +461,7 @@ extern const struct dentry_operations orangefs_dentry_operations;
 #define ORANGEFS_OP_CANCELLATION  4   /* this is a cancellation */
 #define ORANGEFS_OP_NO_MUTEX      8   /* don't acquire request_mutex */
 #define ORANGEFS_OP_ASYNC         16  /* Queue it, but don't wait */
+#define ORANGEFS_OP_WRITEBACK     32
 
 int service_operation(struct orangefs_kernel_op_s *op,
 		      const char *op_name,
diff --git a/fs/orangefs/orangefs-mod.c b/fs/orangefs/orangefs-mod.c
index 85ef87245a87..c010c1fddafc 100644
--- a/fs/orangefs/orangefs-mod.c
+++ b/fs/orangefs/orangefs-mod.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * (C) 2001 Clemson University and The University of Chicago
  *
@@ -30,6 +31,7 @@ static ulong module_parm_debug_mask;
 __u64 orangefs_gossip_debug_mask;
 int op_timeout_secs = ORANGEFS_DEFAULT_OP_TIMEOUT_SECS;
 int slot_timeout_secs = ORANGEFS_DEFAULT_SLOT_TIMEOUT_SECS;
+int orangefs_cache_timeout_msecs = 50;
 int orangefs_dcache_timeout_msecs = 50;
 int orangefs_getattr_timeout_msecs = 50;
 
@@ -127,9 +129,7 @@ static int __init orangefs_init(void)
 	if (ret)
 		goto cleanup_key_table;
 
-	ret = orangefs_debugfs_init(module_parm_debug_mask);
-	if (ret)
-		goto debugfs_init_failed;
+	orangefs_debugfs_init(module_parm_debug_mask);
 
 	ret = orangefs_sysfs_init();
 	if (ret)
@@ -159,8 +159,6 @@ cleanup_device:
 	orangefs_dev_cleanup();
 
 sysfs_init_failed:
-
-debugfs_init_failed:
 	orangefs_debugfs_cleanup();
 
 cleanup_key_table:
diff --git a/fs/orangefs/orangefs-sysfs.c b/fs/orangefs/orangefs-sysfs.c
index 19739aaee675..3627ea946402 100644
--- a/fs/orangefs/orangefs-sysfs.c
+++ b/fs/orangefs/orangefs-sysfs.c
@@ -62,6 +62,14 @@
  *			Slots are requested and waited for,
  *			the wait times out after slot_timeout_secs.
  *
+ * What:		/sys/fs/orangefs/cache_timeout_msecs
+ * Date:		Mar 2018
+ * Contact:		Martin Brandenburg <martin@omnibond.com>
+ * Description:
+ *			Time in milliseconds between which
+ *			orangefs_revalidate_mapping will invalidate the page
+ *			cache.
+ *
  * What:		/sys/fs/orangefs/dcache_timeout_msecs
  * Date:		Jul 2016
  * Contact:		Martin Brandenburg <martin@omnibond.com>
@@ -222,6 +230,13 @@ static ssize_t sysfs_int_show(struct kobject *kobj,
 				       slot_timeout_secs);
 			goto out;
 		} else if (!strcmp(attr->attr.name,
+				   "cache_timeout_msecs")) {
+			rc = scnprintf(buf,
+				       PAGE_SIZE,
+				       "%d\n",
+				       orangefs_cache_timeout_msecs);
+			goto out;
+		} else if (!strcmp(attr->attr.name,
 				   "dcache_timeout_msecs")) {
 			rc = scnprintf(buf,
 				       PAGE_SIZE,
@@ -277,6 +292,9 @@ static ssize_t sysfs_int_store(struct kobject *kobj,
 	} else if (!strcmp(attr->attr.name, "slot_timeout_secs")) {
 		rc = kstrtoint(buf, 0, &slot_timeout_secs);
 		goto out;
+	} else if (!strcmp(attr->attr.name, "cache_timeout_msecs")) {
+		rc = kstrtoint(buf, 0, &orangefs_cache_timeout_msecs);
+		goto out;
 	} else if (!strcmp(attr->attr.name, "dcache_timeout_msecs")) {
 		rc = kstrtoint(buf, 0, &orangefs_dcache_timeout_msecs);
 		goto out;
@@ -818,6 +836,9 @@ static struct orangefs_attribute op_timeout_secs_attribute =
 static struct orangefs_attribute slot_timeout_secs_attribute =
 	__ATTR(slot_timeout_secs, 0664, sysfs_int_show, sysfs_int_store);
 
+static struct orangefs_attribute cache_timeout_msecs_attribute =
+	__ATTR(cache_timeout_msecs, 0664, sysfs_int_show, sysfs_int_store);
+
 static struct orangefs_attribute dcache_timeout_msecs_attribute =
 	__ATTR(dcache_timeout_msecs, 0664, sysfs_int_show, sysfs_int_store);
 
@@ -861,6 +882,7 @@ static struct orangefs_attribute perf_time_interval_secs_attribute =
 static struct attribute *orangefs_default_attrs[] = {
 	&op_timeout_secs_attribute.attr,
 	&slot_timeout_secs_attribute.attr,
+	&cache_timeout_msecs_attribute.attr,
 	&dcache_timeout_msecs_attribute.attr,
 	&getattr_timeout_msecs_attribute.attr,
 	&readahead_count_attribute.attr,
diff --git a/fs/orangefs/orangefs-utils.c b/fs/orangefs/orangefs-utils.c
index 804c8a261e4b..d4b7ae763186 100644
--- a/fs/orangefs/orangefs-utils.c
+++ b/fs/orangefs/orangefs-utils.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
  * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
  *
  * See COPYING in top-level directory.
  */
@@ -135,51 +136,37 @@ static int orangefs_inode_perms(struct ORANGEFS_sys_attr_s *attrs)
  * NOTE: in kernel land, we never use the sys_attr->link_target for
  * anything, so don't bother copying it into the sys_attr object here.
  */
-static inline int copy_attributes_from_inode(struct inode *inode,
-					     struct ORANGEFS_sys_attr_s *attrs,
-					     struct iattr *iattr)
+static inline void copy_attributes_from_inode(struct inode *inode,
+    struct ORANGEFS_sys_attr_s *attrs)
 {
-	umode_t tmp_mode;
-
-	if (!iattr || !inode || !attrs) {
-		gossip_err("NULL iattr (%p), inode (%p), attrs (%p) "
-			   "in copy_attributes_from_inode!\n",
-			   iattr,
-			   inode,
-			   attrs);
-		return -EINVAL;
-	}
-	/*
-	 * We need to be careful to only copy the attributes out of the
-	 * iattr object that we know are valid.
-	 */
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 	attrs->mask = 0;
-	if (iattr->ia_valid & ATTR_UID) {
-		attrs->owner = from_kuid(&init_user_ns, iattr->ia_uid);
+	if (orangefs_inode->attr_valid & ATTR_UID) {
+		attrs->owner = from_kuid(&init_user_ns, inode->i_uid);
 		attrs->mask |= ORANGEFS_ATTR_SYS_UID;
 		gossip_debug(GOSSIP_UTILS_DEBUG, "(UID) %d\n", attrs->owner);
 	}
-	if (iattr->ia_valid & ATTR_GID) {
-		attrs->group = from_kgid(&init_user_ns, iattr->ia_gid);
+	if (orangefs_inode->attr_valid & ATTR_GID) {
+		attrs->group = from_kgid(&init_user_ns, inode->i_gid);
 		attrs->mask |= ORANGEFS_ATTR_SYS_GID;
 		gossip_debug(GOSSIP_UTILS_DEBUG, "(GID) %d\n", attrs->group);
 	}
 
-	if (iattr->ia_valid & ATTR_ATIME) {
+	if (orangefs_inode->attr_valid & ATTR_ATIME) {
 		attrs->mask |= ORANGEFS_ATTR_SYS_ATIME;
-		if (iattr->ia_valid & ATTR_ATIME_SET) {
-			attrs->atime = (time64_t)iattr->ia_atime.tv_sec;
+		if (orangefs_inode->attr_valid & ATTR_ATIME_SET) {
+			attrs->atime = (time64_t)inode->i_atime.tv_sec;
 			attrs->mask |= ORANGEFS_ATTR_SYS_ATIME_SET;
 		}
 	}
-	if (iattr->ia_valid & ATTR_MTIME) {
+	if (orangefs_inode->attr_valid & ATTR_MTIME) {
 		attrs->mask |= ORANGEFS_ATTR_SYS_MTIME;
-		if (iattr->ia_valid & ATTR_MTIME_SET) {
-			attrs->mtime = (time64_t)iattr->ia_mtime.tv_sec;
+		if (orangefs_inode->attr_valid & ATTR_MTIME_SET) {
+			attrs->mtime = (time64_t)inode->i_mtime.tv_sec;
 			attrs->mask |= ORANGEFS_ATTR_SYS_MTIME_SET;
 		}
 	}
-	if (iattr->ia_valid & ATTR_CTIME)
+	if (orangefs_inode->attr_valid & ATTR_CTIME)
 		attrs->mask |= ORANGEFS_ATTR_SYS_CTIME;
 
 	/*
@@ -188,36 +175,10 @@ static inline int copy_attributes_from_inode(struct inode *inode,
 	 * worry about ATTR_SIZE
 	 */
 
-	if (iattr->ia_valid & ATTR_MODE) {
-		tmp_mode = iattr->ia_mode;
-		if (tmp_mode & (S_ISVTX)) {
-			if (is_root_handle(inode)) {
-				/*
-				 * allow sticky bit to be set on root (since
-				 * it shows up that way by default anyhow),
-				 * but don't show it to the server
-				 */
-				tmp_mode -= S_ISVTX;
-			} else {
-				gossip_debug(GOSSIP_UTILS_DEBUG,
-					"%s: setting sticky bit not supported.\n",
-					__func__);
-				return -EINVAL;
-			}
-		}
-
-		if (tmp_mode & (S_ISUID)) {
-			gossip_debug(GOSSIP_UTILS_DEBUG,
-				"%s: setting setuid bit not supported.\n",
-				__func__);
-			return -EINVAL;
-		}
-
-		attrs->perms = ORANGEFS_util_translate_mode(tmp_mode);
+	if (orangefs_inode->attr_valid & ATTR_MODE) {
+		attrs->perms = ORANGEFS_util_translate_mode(inode->i_mode);
 		attrs->mask |= ORANGEFS_ATTR_SYS_PERM;
 	}
-
-	return 0;
 }
 
 static int orangefs_inode_type(enum orangefs_ds_type objtype)
@@ -272,27 +233,30 @@ static int orangefs_inode_is_stale(struct inode *inode,
 	return 0;
 }
 
-int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
-    u32 request_mask)
+int orangefs_inode_getattr(struct inode *inode, int flags)
 {
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 	struct orangefs_kernel_op_s *new_op;
 	loff_t inode_size;
 	int ret, type;
 
-	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU\n", __func__,
-	    get_khandle_from_ino(inode));
+	gossip_debug(GOSSIP_UTILS_DEBUG, "%s: called on inode %pU flags %d\n",
+	    __func__, get_khandle_from_ino(inode), flags);
 
-	if (!new && !bypass) {
-		/*
-		 * Must have all the attributes in the mask and be within cache
-		 * time.
-		 */
-		if ((request_mask & orangefs_inode->getattr_mask) ==
-		    request_mask &&
-		    time_before(jiffies, orangefs_inode->getattr_time))
-			return 0;
+again:
+	spin_lock(&inode->i_lock);
+	/* Must have all the attributes in the mask and be within cache time. */
+	if ((!flags && time_before(jiffies, orangefs_inode->getattr_time)) ||
+	    orangefs_inode->attr_valid || inode->i_state & I_DIRTY_PAGES) {
+		if (orangefs_inode->attr_valid) {
+			spin_unlock(&inode->i_lock);
+			write_inode_now(inode, 1);
+			goto again;
+		}
+		spin_unlock(&inode->i_lock);
+		return 0;
 	}
+	spin_unlock(&inode->i_lock);
 
 	new_op = op_alloc(ORANGEFS_VFS_OP_GETATTR);
 	if (!new_op)
@@ -302,7 +266,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
 	 * Size is the hardest attribute to get.  The incremental cost of any
 	 * other attribute is essentially zero.
 	 */
-	if (request_mask & STATX_SIZE || new)
+	if (flags)
 		new_op->upcall.req.getattr.mask = ORANGEFS_ATTR_SYS_ALL_NOHINT;
 	else
 		new_op->upcall.req.getattr.mask =
@@ -313,13 +277,33 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
 	if (ret != 0)
 		goto out;
 
-	if (!new) {
+again2:
+	spin_lock(&inode->i_lock);
+	/* Must have all the attributes in the mask and be within cache time. */
+	if ((!flags && time_before(jiffies, orangefs_inode->getattr_time)) ||
+	    orangefs_inode->attr_valid || inode->i_state & I_DIRTY_PAGES) {
+		if (orangefs_inode->attr_valid) {
+			spin_unlock(&inode->i_lock);
+			write_inode_now(inode, 1);
+			goto again2;
+		}
+		if (inode->i_state & I_DIRTY_PAGES) {
+			ret = 0;
+			goto out_unlock;
+		}
+		gossip_debug(GOSSIP_UTILS_DEBUG, "%s: in cache or dirty\n",
+		    __func__);
+		ret = 0;
+		goto out_unlock;
+	}
+
+	if (!(flags & ORANGEFS_GETATTR_NEW)) {
 		ret = orangefs_inode_is_stale(inode,
 		    &new_op->downcall.resp.getattr.attributes,
 		    new_op->downcall.resp.getattr.link_target);
 		if (ret) {
 			ret = -ESTALE;
-			goto out;
+			goto out_unlock;
 		}
 	}
 
@@ -329,30 +313,26 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
 	case S_IFREG:
 		inode->i_flags = orangefs_inode_flags(&new_op->
 		    downcall.resp.getattr.attributes);
-		if (request_mask & STATX_SIZE || new) {
+		if (flags) {
 			inode_size = (loff_t)new_op->
 			    downcall.resp.getattr.attributes.size;
 			inode->i_size = inode_size;
 			inode->i_blkbits = ffs(new_op->downcall.resp.getattr.
 			    attributes.blksize);
-			spin_lock(&inode->i_lock);
 			inode->i_bytes = inode_size;
 			inode->i_blocks =
 			    (inode_size + 512 - inode_size % 512)/512;
-			spin_unlock(&inode->i_lock);
 		}
 		break;
 	case S_IFDIR:
-		if (request_mask & STATX_SIZE || new) {
+		if (flags) {
 			inode->i_size = PAGE_SIZE;
-			spin_lock(&inode->i_lock);
 			inode_set_bytes(inode, inode->i_size);
-			spin_unlock(&inode->i_lock);
 		}
 		set_nlink(inode, 1);
 		break;
 	case S_IFLNK:
-		if (new) {
+		if (flags & ORANGEFS_GETATTR_NEW) {
 			inode->i_size = (loff_t)strlen(new_op->
 			    downcall.resp.getattr.link_target);
 			ret = strscpy(orangefs_inode->link_target,
@@ -360,7 +340,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
 			    ORANGEFS_NAME_MAX);
 			if (ret == -E2BIG) {
 				ret = -EIO;
-				goto out;
+				goto out_unlock;
 			}
 			inode->i_link = orangefs_inode->link_target;
 		}
@@ -370,7 +350,7 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
 		/* XXX: ESTALE?  This is what is done if it is not new. */
 		orangefs_make_bad_inode(inode);
 		ret = -ESTALE;
-		goto out;
+		goto out_unlock;
 	}
 
 	inode->i_uid = make_kuid(&init_user_ns, new_op->
@@ -393,11 +373,9 @@ int orangefs_inode_getattr(struct inode *inode, int new, int bypass,
 
 	orangefs_inode->getattr_time = jiffies +
 	    orangefs_getattr_timeout_msecs*HZ/1000;
-	if (request_mask & STATX_SIZE || new)
-		orangefs_inode->getattr_mask = STATX_BASIC_STATS;
-	else
-		orangefs_inode->getattr_mask = STATX_BASIC_STATS & ~STATX_SIZE;
 	ret = 0;
+out_unlock:
+	spin_unlock(&inode->i_lock);
 out:
 	op_release(new_op);
 	return ret;
@@ -436,7 +414,7 @@ out:
  * issues a orangefs setattr request to make sure the new attribute values
  * take effect if successful.  returns 0 on success; -errno otherwise
  */
-int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr)
+int orangefs_inode_setattr(struct inode *inode)
 {
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 	struct orangefs_kernel_op_s *new_op;
@@ -446,24 +424,31 @@ int orangefs_inode_setattr(struct inode *inode, struct iattr *iattr)
 	if (!new_op)
 		return -ENOMEM;
 
+	spin_lock(&inode->i_lock);
+	new_op->upcall.uid = from_kuid(&init_user_ns, orangefs_inode->attr_uid);
+	new_op->upcall.gid = from_kgid(&init_user_ns, orangefs_inode->attr_gid);
 	new_op->upcall.req.setattr.refn = orangefs_inode->refn;
-	ret = copy_attributes_from_inode(inode,
-		       &new_op->upcall.req.setattr.attributes,
-		       iattr);
-	if (ret >= 0) {
-		ret = service_operation(new_op, __func__,
-				get_interruptible_flag(inode));
-
-		gossip_debug(GOSSIP_UTILS_DEBUG,
-			     "orangefs_inode_setattr: returning %d\n",
-			     ret);
+	copy_attributes_from_inode(inode,
+	    &new_op->upcall.req.setattr.attributes);
+	orangefs_inode->attr_valid = 0;
+	if (!new_op->upcall.req.setattr.attributes.mask) {
+		spin_unlock(&inode->i_lock);
+		op_release(new_op);
+		return 0;
 	}
+	spin_unlock(&inode->i_lock);
+
+	ret = service_operation(new_op, __func__,
+	    get_interruptible_flag(inode) | ORANGEFS_OP_WRITEBACK);
+	gossip_debug(GOSSIP_UTILS_DEBUG,
+	    "orangefs_inode_setattr: returning %d\n", ret);
+	if (ret)
+		orangefs_make_bad_inode(inode);
 
 	op_release(new_op);
 
 	if (ret == 0)
 		orangefs_inode->getattr_time = jiffies - 1;
-
 	return ret;
 }
 
diff --git a/fs/orangefs/super.c b/fs/orangefs/super.c
index dfaee90d30bd..ee5efdc35cc1 100644
--- a/fs/orangefs/super.c
+++ b/fs/orangefs/super.c
@@ -10,6 +10,7 @@
 #include "orangefs-bufmap.h"
 
 #include <linux/parser.h>
+#include <linux/hashtable.h>
 
 /* a cache for orangefs-inode objects (i.e. orangefs inode private data) */
 static struct kmem_cache *orangefs_inode_cache;
@@ -124,10 +125,18 @@ static struct inode *orangefs_alloc_inode(struct super_block *sb)
 	return &orangefs_inode->vfs_inode;
 }
 
-static void orangefs_i_callback(struct rcu_head *head)
+static void orangefs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_cached_xattr *cx;
+	struct hlist_node *tmp;
+	int i;
+
+	hash_for_each_safe(orangefs_inode->xattr_cache, i, tmp, cx, node) {
+		hlist_del(&cx->node);
+		kfree(cx);
+	}
+
 	kmem_cache_free(orangefs_inode_cache, orangefs_inode);
 }
 
@@ -138,8 +147,13 @@ static void orangefs_destroy_inode(struct inode *inode)
 	gossip_debug(GOSSIP_SUPER_DEBUG,
 			"%s: deallocated %p destroying inode %pU\n",
 			__func__, orangefs_inode, get_khandle_from_ino(inode));
+}
 
-	call_rcu(&inode->i_rcu, orangefs_i_callback);
+static int orangefs_write_inode(struct inode *inode,
+				struct writeback_control *wbc)
+{
+	gossip_debug(GOSSIP_SUPER_DEBUG, "orangefs_write_inode\n");
+	return orangefs_inode_setattr(inode);
 }
 
 /*
@@ -299,7 +313,9 @@ void fsid_key_table_finalize(void)
 
 static const struct super_operations orangefs_s_ops = {
 	.alloc_inode = orangefs_alloc_inode,
+	.free_inode = orangefs_free_inode,
 	.destroy_inode = orangefs_destroy_inode,
+	.write_inode = orangefs_write_inode,
 	.drop_inode = generic_delete_inode,
 	.statfs = orangefs_statfs,
 	.remount_fs = orangefs_remount_fs,
@@ -397,15 +413,11 @@ static int orangefs_fill_sb(struct super_block *sb,
 		struct orangefs_fs_mount_response *fs_mount,
 		void *data, int silent)
 {
-	int ret = -EINVAL;
-	struct inode *root = NULL;
-	struct dentry *root_dentry = NULL;
+	int ret;
+	struct inode *root;
+	struct dentry *root_dentry;
 	struct orangefs_object_kref root_object;
 
-	/* alloc and init our private orangefs sb info */
-	sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL);
-	if (!ORANGEFS_SB(sb))
-		return -ENOMEM;
 	ORANGEFS_SB(sb)->sb = sb;
 
 	ORANGEFS_SB(sb)->root_khandle = fs_mount->root_khandle;
@@ -428,6 +440,10 @@ static int orangefs_fill_sb(struct super_block *sb,
 	sb->s_blocksize_bits = PAGE_SHIFT;
 	sb->s_maxbytes = MAX_LFS_FILESIZE;
 
+	ret = super_setup_bdi(sb);
+	if (ret)
+		return ret;
+
 	root_object.khandle = ORANGEFS_SB(sb)->root_khandle;
 	root_object.fs_id = ORANGEFS_SB(sb)->fs_id;
 	gossip_debug(GOSSIP_SUPER_DEBUG,
@@ -506,6 +522,13 @@ struct dentry *orangefs_mount(struct file_system_type *fst,
 		goto free_op;
 	}
 
+	/* alloc and init our private orangefs sb info */
+	sb->s_fs_info = kzalloc(sizeof(struct orangefs_sb_info_s), GFP_KERNEL);
+	if (!ORANGEFS_SB(sb)) {
+		d = ERR_PTR(-ENOMEM);
+		goto free_op;
+	}
+
 	ret = orangefs_fill_sb(sb,
 	      &new_op->downcall.resp.fs_mount, data,
 	      flags & SB_SILENT ? 1 : 0);
diff --git a/fs/orangefs/waitqueue.c b/fs/orangefs/waitqueue.c
index 0729d2645d6a..beafc33d57be 100644
--- a/fs/orangefs/waitqueue.c
+++ b/fs/orangefs/waitqueue.c
@@ -19,7 +19,7 @@
 
 static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
 		long timeout,
-		bool interruptible)
+		int flags)
 			__acquires(op->lock);
 static void orangefs_clean_up_interrupted_operation(struct orangefs_kernel_op_s *op)
 	__releases(op->lock);
@@ -143,9 +143,7 @@ retry_servicing:
 	if (!(flags & ORANGEFS_OP_NO_MUTEX))
 		mutex_unlock(&orangefs_request_mutex);
 
-	ret = wait_for_matching_downcall(op, timeout,
-					 flags & ORANGEFS_OP_INTERRUPTIBLE);
-
+	ret = wait_for_matching_downcall(op, timeout, flags);
 	gossip_debug(GOSSIP_WAIT_DEBUG,
 		     "%s: wait_for_matching_downcall returned %d for %p\n",
 		     __func__,
@@ -319,10 +317,12 @@ static void
  */
 static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
 		long timeout,
-		bool interruptible)
+		int flags)
 			__acquires(op->lock)
 {
 	long n;
+	int writeback = flags & ORANGEFS_OP_WRITEBACK,
+	    interruptible = flags & ORANGEFS_OP_INTERRUPTIBLE;
 
 	/*
 	 * There's a "schedule_timeout" inside of these wait
@@ -330,10 +330,12 @@ static int wait_for_matching_downcall(struct orangefs_kernel_op_s *op,
 	 * user process that needs something done and is being
 	 * manipulated by the client-core process.
 	 */
-	if (interruptible)
+	if (writeback)
+		n = wait_for_completion_io_timeout(&op->waitq, timeout);
+	else if (!writeback && interruptible)
 		n = wait_for_completion_interruptible_timeout(&op->waitq,
-							      timeout);
-	else
+								      timeout);
+	else /* !writeback && !interruptible but compiler complains */
 		n = wait_for_completion_killable_timeout(&op->waitq, timeout);
 
 	spin_lock(&op->lock);
diff --git a/fs/orangefs/xattr.c b/fs/orangefs/xattr.c
index 03bcb871544d..bdc285aea360 100644
--- a/fs/orangefs/xattr.c
+++ b/fs/orangefs/xattr.c
@@ -1,6 +1,7 @@
 // SPDX-License-Identifier: GPL-2.0
 /*
  * (C) 2001 Clemson University and The University of Chicago
+ * Copyright 2018 Omnibond Systems, L.L.C.
  *
  * See COPYING in top-level directory.
  */
@@ -14,7 +15,7 @@
 #include "orangefs-bufmap.h"
 #include <linux/posix_acl_xattr.h>
 #include <linux/xattr.h>
-
+#include <linux/hashtable.h>
 
 #define SYSTEM_ORANGEFS_KEY "system.pvfs2."
 #define SYSTEM_ORANGEFS_KEY_LEN 13
@@ -50,6 +51,35 @@ static inline int convert_to_internal_xattr_flags(int setxattr_flags)
 	return internal_flag;
 }
 
+static unsigned int xattr_key(const char *key)
+{
+	unsigned int i = 0;
+	while (key)
+		i += *key++;
+	return i % 16;
+}
+
+static struct orangefs_cached_xattr *find_cached_xattr(struct inode *inode,
+    const char *key)
+{
+	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
+	struct orangefs_cached_xattr *cx;
+	struct hlist_head *h;
+	struct hlist_node *tmp;
+	h = &orangefs_inode->xattr_cache[xattr_key(key)];
+	if (hlist_empty(h))
+		return NULL;
+	hlist_for_each_entry_safe(cx, tmp, h, node) {
+/*		if (!time_before(jiffies, cx->timeout)) {
+			hlist_del(&cx->node);
+			kfree(cx);
+			continue;
+		}*/
+		if (!strcmp(cx->key, key))
+			return cx;
+	}
+	return NULL;
+}
 
 /*
  * Tries to get a specified key's attributes of a given
@@ -65,6 +95,7 @@ ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
 {
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 	struct orangefs_kernel_op_s *new_op = NULL;
+	struct orangefs_cached_xattr *cx;
 	ssize_t ret = -ENOMEM;
 	ssize_t length = 0;
 	int fsuid;
@@ -93,6 +124,27 @@ ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
 
 	down_read(&orangefs_inode->xattr_sem);
 
+	cx = find_cached_xattr(inode, name);
+	if (cx && time_before(jiffies, cx->timeout)) {
+		if (cx->length == -1) {
+			ret = -ENODATA;
+			goto out_unlock;
+		} else {
+			if (size == 0) {
+				ret = cx->length;
+				goto out_unlock;
+			}
+			if (cx->length > size) {
+				ret = -ERANGE;
+				goto out_unlock;
+			}
+			memcpy(buffer, cx->val, cx->length);
+			memset(buffer + cx->length, 0, size - cx->length);
+			ret = cx->length;
+			goto out_unlock;
+		}
+	}
+
 	new_op = op_alloc(ORANGEFS_VFS_OP_GETXATTR);
 	if (!new_op)
 		goto out_unlock;
@@ -117,6 +169,15 @@ ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
 				     " does not exist!\n",
 				     get_khandle_from_ino(inode),
 				     (char *)new_op->upcall.req.getxattr.key);
+			cx = kmalloc(sizeof *cx, GFP_KERNEL);
+			if (cx) {
+				strcpy(cx->key, name);
+				cx->length = -1;
+				cx->timeout = jiffies +
+				    orangefs_getattr_timeout_msecs*HZ/1000;
+				hash_add(orangefs_inode->xattr_cache, &cx->node,
+				    xattr_key(cx->key));
+			}
 		}
 		goto out_release_op;
 	}
@@ -156,6 +217,23 @@ ssize_t orangefs_inode_getxattr(struct inode *inode, const char *name,
 
 	ret = length;
 
+	if (cx) {
+		strcpy(cx->key, name);
+		memcpy(cx->val, buffer, length);
+		cx->length = length;
+		cx->timeout = jiffies + HZ;
+	} else {
+		cx = kmalloc(sizeof *cx, GFP_KERNEL);
+		if (cx) {
+			strcpy(cx->key, name);
+			memcpy(cx->val, buffer, length);
+			cx->length = length;
+			cx->timeout = jiffies + HZ;
+			hash_add(orangefs_inode->xattr_cache, &cx->node,
+			    xattr_key(cx->key));
+		}
+	}
+
 out_release_op:
 	op_release(new_op);
 out_unlock:
@@ -168,6 +246,9 @@ static int orangefs_inode_removexattr(struct inode *inode, const char *name,
 {
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 	struct orangefs_kernel_op_s *new_op = NULL;
+	struct orangefs_cached_xattr *cx;
+	struct hlist_head *h;
+	struct hlist_node *tmp;
 	int ret = -ENOMEM;
 
 	if (strlen(name) >= ORANGEFS_MAX_XATTR_NAMELEN)
@@ -209,6 +290,16 @@ static int orangefs_inode_removexattr(struct inode *inode, const char *name,
 		     "orangefs_inode_removexattr: returning %d\n", ret);
 
 	op_release(new_op);
+
+	h = &orangefs_inode->xattr_cache[xattr_key(name)];
+	hlist_for_each_entry_safe(cx, tmp, h, node) {
+		if (!strcmp(cx->key, name)) {
+			hlist_del(&cx->node);
+			kfree(cx);
+			break;
+		}
+	}
+
 out_unlock:
 	up_write(&orangefs_inode->xattr_sem);
 	return ret;
@@ -226,6 +317,9 @@ int orangefs_inode_setxattr(struct inode *inode, const char *name,
 	struct orangefs_inode_s *orangefs_inode = ORANGEFS_I(inode);
 	struct orangefs_kernel_op_s *new_op;
 	int internal_flag = 0;
+	struct orangefs_cached_xattr *cx;
+	struct hlist_head *h;
+	struct hlist_node *tmp;
 	int ret = -ENOMEM;
 
 	gossip_debug(GOSSIP_XATTR_DEBUG,
@@ -287,6 +381,16 @@ int orangefs_inode_setxattr(struct inode *inode, const char *name,
 
 	/* when request is serviced properly, free req op struct */
 	op_release(new_op);
+
+	h = &orangefs_inode->xattr_cache[xattr_key(name)];
+	hlist_for_each_entry_safe(cx, tmp, h, node) {
+		if (!strcmp(cx->key, name)) {
+			hlist_del(&cx->node);
+			kfree(cx);
+			break;
+		}
+	}
+
 out_unlock:
 	up_write(&orangefs_inode->xattr_sem);
 	return ret;
diff --git a/fs/overlayfs/Kconfig b/fs/overlayfs/Kconfig
index 2ef91be2a04e..444e2da4f60e 100644
--- a/fs/overlayfs/Kconfig
+++ b/fs/overlayfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config OVERLAY_FS
 	tristate "Overlay filesystem support"
 	select EXPORTFS
diff --git a/fs/overlayfs/Makefile b/fs/overlayfs/Makefile
index 46e1ff8ac056..9164c585eb2f 100644
--- a/fs/overlayfs/Makefile
+++ b/fs/overlayfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the overlay filesystem.
 #
diff --git a/fs/overlayfs/copy_up.c b/fs/overlayfs/copy_up.c
index 9e62dcf06fc4..b801c6353100 100644
--- a/fs/overlayfs/copy_up.c
+++ b/fs/overlayfs/copy_up.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *
  * Copyright (C) 2011 Novell Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/module.h>
@@ -37,7 +34,7 @@ static int ovl_ccup_get(char *buf, const struct kernel_param *param)
 }
 
 module_param_call(check_copy_up, ovl_ccup_set, ovl_ccup_get, NULL, 0644);
-MODULE_PARM_DESC(ovl_check_copy_up, "Obsolete; does nothing");
+MODULE_PARM_DESC(check_copy_up, "Obsolete; does nothing");
 
 int ovl_copy_xattr(struct dentry *old, struct dentry *new)
 {
@@ -443,6 +440,24 @@ static int ovl_copy_up_inode(struct ovl_copy_up_ctx *c, struct dentry *temp)
 {
 	int err;
 
+	/*
+	 * Copy up data first and then xattrs. Writing data after
+	 * xattrs will remove security.capability xattr automatically.
+	 */
+	if (S_ISREG(c->stat.mode) && !c->metacopy) {
+		struct path upperpath, datapath;
+
+		ovl_path_upper(c->dentry, &upperpath);
+		if (WARN_ON(upperpath.dentry != NULL))
+			return -EIO;
+		upperpath.dentry = temp;
+
+		ovl_path_lowerdata(c->dentry, &datapath);
+		err = ovl_copy_up_data(&datapath, &upperpath, c->stat.size);
+		if (err)
+			return err;
+	}
+
 	err = ovl_copy_xattr(c->lowerpath.dentry, temp);
 	if (err)
 		return err;
@@ -460,19 +475,6 @@ static int ovl_copy_up_inode(struct ovl_copy_up_ctx *c, struct dentry *temp)
 			return err;
 	}
 
-	if (S_ISREG(c->stat.mode) && !c->metacopy) {
-		struct path upperpath, datapath;
-
-		ovl_path_upper(c->dentry, &upperpath);
-		BUG_ON(upperpath.dentry != NULL);
-		upperpath.dentry = temp;
-
-		ovl_path_lowerdata(c->dentry, &datapath);
-		err = ovl_copy_up_data(&datapath, &upperpath, c->stat.size);
-		if (err)
-			return err;
-	}
-
 	if (c->metacopy) {
 		err = ovl_check_setxattr(c->dentry, temp, OVL_XATTR_METACOPY,
 					 NULL, 0, -EOPNOTSUPP);
@@ -737,6 +739,8 @@ static int ovl_copy_up_meta_inode_data(struct ovl_copy_up_ctx *c)
 {
 	struct path upperpath, datapath;
 	int err;
+	char *capability = NULL;
+	ssize_t uninitialized_var(cap_size);
 
 	ovl_path_upper(c->dentry, &upperpath);
 	if (WARN_ON(upperpath.dentry == NULL))
@@ -746,15 +750,37 @@ static int ovl_copy_up_meta_inode_data(struct ovl_copy_up_ctx *c)
 	if (WARN_ON(datapath.dentry == NULL))
 		return -EIO;
 
+	if (c->stat.size) {
+		err = cap_size = ovl_getxattr(upperpath.dentry, XATTR_NAME_CAPS,
+					      &capability, 0);
+		if (err < 0 && err != -ENODATA)
+			goto out;
+	}
+
 	err = ovl_copy_up_data(&datapath, &upperpath, c->stat.size);
 	if (err)
-		return err;
+		goto out_free;
+
+	/*
+	 * Writing to upper file will clear security.capability xattr. We
+	 * don't want that to happen for normal copy-up operation.
+	 */
+	if (capability) {
+		err = ovl_do_setxattr(upperpath.dentry, XATTR_NAME_CAPS,
+				      capability, cap_size, 0);
+		if (err)
+			goto out_free;
+	}
+
 
 	err = vfs_removexattr(upperpath.dentry, OVL_XATTR_METACOPY);
 	if (err)
-		return err;
+		goto out_free;
 
 	ovl_set_upperdata(d_inode(c->dentry));
+out_free:
+	kfree(capability);
+out:
 	return err;
 }
 
@@ -880,14 +906,14 @@ static bool ovl_open_need_copy_up(struct dentry *dentry, int flags)
 	return true;
 }
 
-int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags)
+int ovl_maybe_copy_up(struct dentry *dentry, int flags)
 {
 	int err = 0;
 
-	if (ovl_open_need_copy_up(dentry, file_flags)) {
+	if (ovl_open_need_copy_up(dentry, flags)) {
 		err = ovl_want_write(dentry);
 		if (!err) {
-			err = ovl_copy_up_flags(dentry, file_flags);
+			err = ovl_copy_up_flags(dentry, flags);
 			ovl_drop_write(dentry);
 		}
 	}
diff --git a/fs/overlayfs/dir.c b/fs/overlayfs/dir.c
index 82c129bfe58d..702aa63f6774 100644
--- a/fs/overlayfs/dir.c
+++ b/fs/overlayfs/dir.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *
  * Copyright (C) 2011 Novell Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/fs.h>
@@ -21,7 +18,7 @@
 
 static unsigned short ovl_redirect_max = 256;
 module_param_named(redirect_max, ovl_redirect_max, ushort, 0644);
-MODULE_PARM_DESC(ovl_redirect_max,
+MODULE_PARM_DESC(redirect_max,
 		 "Maximum length of absolute redirect xattr value");
 
 static int ovl_set_redirect(struct dentry *dentry, bool samedir);
@@ -260,7 +257,7 @@ static int ovl_instantiate(struct dentry *dentry, struct inode *inode,
 		 * hashed directory inode aliases.
 		 */
 		inode = ovl_get_inode(dentry->d_sb, &oip);
-		if (WARN_ON(IS_ERR(inode)))
+		if (IS_ERR(inode))
 			return PTR_ERR(inode);
 	} else {
 		WARN_ON(ovl_inode_real(inode) != d_inode(newdentry));
diff --git a/fs/overlayfs/export.c b/fs/overlayfs/export.c
index 54e5d17d7f3e..cb8ec1f65c03 100644
--- a/fs/overlayfs/export.c
+++ b/fs/overlayfs/export.c
@@ -1,13 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Overlayfs NFS export support.
  *
  * Amir Goldstein <amir73il@gmail.com>
  *
  * Copyright (C) 2017-2018 CTERA Networks. All Rights Reserved.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/fs.h>
@@ -398,7 +395,7 @@ static struct dentry *ovl_lookup_real_one(struct dentry *connected,
 	 * pointer because we hold no lock on the real dentry.
 	 */
 	take_dentry_name_snapshot(&name, real);
-	this = lookup_one_len(name.name, connected, strlen(name.name));
+	this = lookup_one_len(name.name.name, connected, name.name.len);
 	err = PTR_ERR(this);
 	if (IS_ERR(this)) {
 		goto fail;
diff --git a/fs/overlayfs/file.c b/fs/overlayfs/file.c
index 84dd957efa24..e235a635d9ec 100644
--- a/fs/overlayfs/file.c
+++ b/fs/overlayfs/file.c
@@ -1,9 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2017 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/cred.h>
@@ -11,6 +8,7 @@
 #include <linux/mount.h>
 #include <linux/xattr.h>
 #include <linux/uio.h>
+#include <linux/uaccess.h>
 #include "overlayfs.h"
 
 static char ovl_whatisit(struct inode *inode, struct inode *realinode)
@@ -29,10 +27,11 @@ static struct file *ovl_open_realfile(const struct file *file,
 	struct inode *inode = file_inode(file);
 	struct file *realfile;
 	const struct cred *old_cred;
+	int flags = file->f_flags | O_NOATIME | FMODE_NONOTIFY;
 
 	old_cred = ovl_override_creds(inode->i_sb);
-	realfile = open_with_fake_path(&file->f_path, file->f_flags | O_NOATIME,
-				       realinode, current_cred());
+	realfile = open_with_fake_path(&file->f_path, flags, realinode,
+				       current_cred());
 	revert_creds(old_cred);
 
 	pr_debug("open(%p[%pD2/%c], 0%o) -> (%p, 0%o)\n",
@@ -50,7 +49,7 @@ static int ovl_change_flags(struct file *file, unsigned int flags)
 	int err;
 
 	/* No atime modificaton on underlying */
-	flags |= O_NOATIME;
+	flags |= O_NOATIME | FMODE_NONOTIFY;
 
 	/* If some flag changed that cannot be changed then something's amiss */
 	if (WARN_ON((file->f_flags ^ flags) & ~OVL_SETFL_MASK))
@@ -116,11 +115,10 @@ static int ovl_real_fdget(const struct file *file, struct fd *real)
 
 static int ovl_open(struct inode *inode, struct file *file)
 {
-	struct dentry *dentry = file_dentry(file);
 	struct file *realfile;
 	int err;
 
-	err = ovl_open_maybe_copy_up(dentry, file->f_flags);
+	err = ovl_maybe_copy_up(file_dentry(file), file->f_flags);
 	if (err)
 		return err;
 
@@ -145,11 +143,47 @@ static int ovl_release(struct inode *inode, struct file *file)
 
 static loff_t ovl_llseek(struct file *file, loff_t offset, int whence)
 {
-	struct inode *realinode = ovl_inode_real(file_inode(file));
+	struct inode *inode = file_inode(file);
+	struct fd real;
+	const struct cred *old_cred;
+	ssize_t ret;
+
+	/*
+	 * The two special cases below do not need to involve real fs,
+	 * so we can optimizing concurrent callers.
+	 */
+	if (offset == 0) {
+		if (whence == SEEK_CUR)
+			return file->f_pos;
+
+		if (whence == SEEK_SET)
+			return vfs_setpos(file, 0, 0);
+	}
+
+	ret = ovl_real_fdget(file, &real);
+	if (ret)
+		return ret;
+
+	/*
+	 * Overlay file f_pos is the master copy that is preserved
+	 * through copy up and modified on read/write, but only real
+	 * fs knows how to SEEK_HOLE/SEEK_DATA and real fs may impose
+	 * limitations that are more strict than ->s_maxbytes for specific
+	 * files, so we use the real file to perform seeks.
+	 */
+	inode_lock(inode);
+	real.file->f_pos = file->f_pos;
 
-	return generic_file_llseek_size(file, offset, whence,
-					realinode->i_sb->s_maxbytes,
-					i_size_read(realinode));
+	old_cred = ovl_override_creds(inode->i_sb);
+	ret = vfs_llseek(real.file, offset, whence);
+	revert_creds(old_cred);
+
+	file->f_pos = real.file->f_pos;
+	inode_unlock(inode);
+
+	fdput(real);
+
+	return ret;
 }
 
 static void ovl_file_accessed(struct file *file)
@@ -372,34 +406,118 @@ static long ovl_real_ioctl(struct file *file, unsigned int cmd,
 	return ret;
 }
 
-static long ovl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+static long ovl_ioctl_set_flags(struct file *file, unsigned int cmd,
+				unsigned long arg, unsigned int iflags)
 {
 	long ret;
 	struct inode *inode = file_inode(file);
+	unsigned int old_iflags;
+
+	if (!inode_owner_or_capable(inode))
+		return -EACCES;
+
+	ret = mnt_want_write_file(file);
+	if (ret)
+		return ret;
+
+	inode_lock(inode);
+
+	/* Check the capability before cred override */
+	ret = -EPERM;
+	old_iflags = READ_ONCE(inode->i_flags);
+	if (((iflags ^ old_iflags) & (S_APPEND | S_IMMUTABLE)) &&
+	    !capable(CAP_LINUX_IMMUTABLE))
+		goto unlock;
+
+	ret = ovl_maybe_copy_up(file_dentry(file), O_WRONLY);
+	if (ret)
+		goto unlock;
+
+	ret = ovl_real_ioctl(file, cmd, arg);
+
+	ovl_copyflags(ovl_inode_real(inode), inode);
+unlock:
+	inode_unlock(inode);
+
+	mnt_drop_write_file(file);
+
+	return ret;
+
+}
+
+static unsigned int ovl_fsflags_to_iflags(unsigned int flags)
+{
+	unsigned int iflags = 0;
+
+	if (flags & FS_SYNC_FL)
+		iflags |= S_SYNC;
+	if (flags & FS_APPEND_FL)
+		iflags |= S_APPEND;
+	if (flags & FS_IMMUTABLE_FL)
+		iflags |= S_IMMUTABLE;
+	if (flags & FS_NOATIME_FL)
+		iflags |= S_NOATIME;
+
+	return iflags;
+}
+
+static long ovl_ioctl_set_fsflags(struct file *file, unsigned int cmd,
+				  unsigned long arg)
+{
+	unsigned int flags;
+
+	if (get_user(flags, (int __user *) arg))
+		return -EFAULT;
+
+	return ovl_ioctl_set_flags(file, cmd, arg,
+				   ovl_fsflags_to_iflags(flags));
+}
+
+static unsigned int ovl_fsxflags_to_iflags(unsigned int xflags)
+{
+	unsigned int iflags = 0;
+
+	if (xflags & FS_XFLAG_SYNC)
+		iflags |= S_SYNC;
+	if (xflags & FS_XFLAG_APPEND)
+		iflags |= S_APPEND;
+	if (xflags & FS_XFLAG_IMMUTABLE)
+		iflags |= S_IMMUTABLE;
+	if (xflags & FS_XFLAG_NOATIME)
+		iflags |= S_NOATIME;
+
+	return iflags;
+}
+
+static long ovl_ioctl_set_fsxflags(struct file *file, unsigned int cmd,
+				   unsigned long arg)
+{
+	struct fsxattr fa;
+
+	memset(&fa, 0, sizeof(fa));
+	if (copy_from_user(&fa, (void __user *) arg, sizeof(fa)))
+		return -EFAULT;
+
+	return ovl_ioctl_set_flags(file, cmd, arg,
+				   ovl_fsxflags_to_iflags(fa.fsx_xflags));
+}
+
+static long ovl_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
+{
+	long ret;
 
 	switch (cmd) {
 	case FS_IOC_GETFLAGS:
+	case FS_IOC_FSGETXATTR:
 		ret = ovl_real_ioctl(file, cmd, arg);
 		break;
 
 	case FS_IOC_SETFLAGS:
-		if (!inode_owner_or_capable(inode))
-			return -EACCES;
-
-		ret = mnt_want_write_file(file);
-		if (ret)
-			return ret;
-
-		ret = ovl_copy_up_with_data(file_dentry(file));
-		if (!ret) {
-			ret = ovl_real_ioctl(file, cmd, arg);
-
-			inode_lock(inode);
-			ovl_copyflags(ovl_inode_real(inode), inode);
-			inode_unlock(inode);
-		}
+		ret = ovl_ioctl_set_fsflags(file, cmd, arg);
+		break;
 
-		mnt_drop_write_file(file);
+	case FS_IOC_FSSETXATTR:
+		ret = ovl_ioctl_set_fsxflags(file, cmd, arg);
 		break;
 
 	default:
diff --git a/fs/overlayfs/inode.c b/fs/overlayfs/inode.c
index 3b7ed5d2279c..7663aeb85fa3 100644
--- a/fs/overlayfs/inode.c
+++ b/fs/overlayfs/inode.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *
  * Copyright (C) 2011 Novell Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/fs.h>
@@ -553,15 +550,15 @@ static void ovl_fill_inode(struct inode *inode, umode_t mode, dev_t rdev,
 	int xinobits = ovl_xino_bits(inode->i_sb);
 
 	/*
-	 * When NFS export is enabled and d_ino is consistent with st_ino
-	 * (samefs or i_ino has enough bits to encode layer), set the same
-	 * value used for d_ino to i_ino, because nfsd readdirplus compares
-	 * d_ino values to i_ino values of child entries. When called from
+	 * When d_ino is consistent with st_ino (samefs or i_ino has enough
+	 * bits to encode layer), set the same value used for st_ino to i_ino,
+	 * so inode number exposed via /proc/locks and a like will be
+	 * consistent with d_ino and st_ino values. An i_ino value inconsistent
+	 * with d_ino also causes nfsd readdirplus to fail.  When called from
 	 * ovl_new_inode(), ino arg is 0, so i_ino will be updated to real
 	 * upper inode i_ino on ovl_inode_init() or ovl_inode_update().
 	 */
-	if (inode->i_sb->s_export_op &&
-	    (ovl_same_sb(inode->i_sb) || xinobits)) {
+	if (ovl_same_sb(inode->i_sb) || xinobits) {
 		inode->i_ino = ino;
 		if (xinobits && fsid && !(ino >> (64 - xinobits)))
 			inode->i_ino |= (unsigned long)fsid << (64 - xinobits);
@@ -777,6 +774,54 @@ struct inode *ovl_lookup_inode(struct super_block *sb, struct dentry *real,
 	return inode;
 }
 
+bool ovl_lookup_trap_inode(struct super_block *sb, struct dentry *dir)
+{
+	struct inode *key = d_inode(dir);
+	struct inode *trap;
+	bool res;
+
+	trap = ilookup5(sb, (unsigned long) key, ovl_inode_test, key);
+	if (!trap)
+		return false;
+
+	res = IS_DEADDIR(trap) && !ovl_inode_upper(trap) &&
+				  !ovl_inode_lower(trap);
+
+	iput(trap);
+	return res;
+}
+
+/*
+ * Create an inode cache entry for layer root dir, that will intentionally
+ * fail ovl_verify_inode(), so any lookup that will find some layer root
+ * will fail.
+ */
+struct inode *ovl_get_trap_inode(struct super_block *sb, struct dentry *dir)
+{
+	struct inode *key = d_inode(dir);
+	struct inode *trap;
+
+	if (!d_is_dir(dir))
+		return ERR_PTR(-ENOTDIR);
+
+	trap = iget5_locked(sb, (unsigned long) key, ovl_inode_test,
+			    ovl_inode_set, key);
+	if (!trap)
+		return ERR_PTR(-ENOMEM);
+
+	if (!(trap->i_state & I_NEW)) {
+		/* Conflicting layer roots? */
+		iput(trap);
+		return ERR_PTR(-ELOOP);
+	}
+
+	trap->i_mode = S_IFDIR;
+	trap->i_flags = S_DEAD;
+	unlock_new_inode(trap);
+
+	return trap;
+}
+
 /*
  * Does overlay inode need to be hashed by lower inode?
  */
@@ -832,7 +877,7 @@ struct inode *ovl_get_inode(struct super_block *sb,
 	int fsid = bylower ? oip->lowerpath->layer->fsid : 0;
 	bool is_dir, metacopy = false;
 	unsigned long ino = 0;
-	int err = -ENOMEM;
+	int err = oip->newinode ? -EEXIST : -ENOMEM;
 
 	if (!realinode)
 		realinode = d_inode(lowerdentry);
@@ -917,6 +962,7 @@ out:
 	return inode;
 
 out_err:
+	pr_warn_ratelimited("overlayfs: failed to get inode (%i)\n", err);
 	inode = ERR_PTR(err);
 	goto out;
 }
diff --git a/fs/overlayfs/namei.c b/fs/overlayfs/namei.c
index efd372312ef1..e9717c2f7d45 100644
--- a/fs/overlayfs/namei.c
+++ b/fs/overlayfs/namei.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2011 Novell Inc.
  * Copyright (C) 2016 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/fs.h>
@@ -18,6 +15,7 @@
 #include "overlayfs.h"
 
 struct ovl_lookup_data {
+	struct super_block *sb;
 	struct qstr name;
 	bool is_dir;
 	bool opaque;
@@ -244,6 +242,12 @@ static int ovl_lookup_single(struct dentry *base, struct ovl_lookup_data *d,
 		if (!d->metacopy || d->last)
 			goto out;
 	} else {
+		if (ovl_lookup_trap_inode(d->sb, this)) {
+			/* Caught in a trap of overlapping layers */
+			err = -ELOOP;
+			goto out_err;
+		}
+
 		if (last_element)
 			d->is_dir = true;
 		if (d->last)
@@ -819,6 +823,7 @@ struct dentry *ovl_lookup(struct inode *dir, struct dentry *dentry,
 	int err;
 	bool metacopy = false;
 	struct ovl_lookup_data d = {
+		.sb = dentry->d_sb,
 		.name = dentry->d_name,
 		.is_dir = false,
 		.opaque = false,
diff --git a/fs/overlayfs/overlayfs.h b/fs/overlayfs/overlayfs.h
index 5e45cb3630a0..6934bcf030f0 100644
--- a/fs/overlayfs/overlayfs.h
+++ b/fs/overlayfs/overlayfs.h
@@ -1,10 +1,7 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *
  * Copyright (C) 2011 Novell Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/kernel.h>
@@ -270,6 +267,7 @@ void ovl_clear_flag(unsigned long flag, struct inode *inode);
 bool ovl_test_flag(unsigned long flag, struct inode *inode);
 bool ovl_inuse_trylock(struct dentry *dentry);
 void ovl_inuse_unlock(struct dentry *dentry);
+bool ovl_is_inuse(struct dentry *dentry);
 bool ovl_need_index(struct dentry *dentry);
 int ovl_nlink_start(struct dentry *dentry);
 void ovl_nlink_end(struct dentry *dentry);
@@ -277,6 +275,8 @@ int ovl_lock_rename_workdir(struct dentry *workdir, struct dentry *upperdir);
 int ovl_check_metacopy_xattr(struct dentry *dentry);
 bool ovl_is_metacopy_dentry(struct dentry *dentry);
 char *ovl_get_redirect_xattr(struct dentry *dentry, int padding);
+ssize_t ovl_getxattr(struct dentry *dentry, char *name, char **value,
+		     size_t padding);
 
 static inline bool ovl_is_impuredir(struct dentry *dentry)
 {
@@ -374,6 +374,8 @@ struct ovl_inode_params {
 struct inode *ovl_new_inode(struct super_block *sb, umode_t mode, dev_t rdev);
 struct inode *ovl_lookup_inode(struct super_block *sb, struct dentry *real,
 			       bool is_upper);
+bool ovl_lookup_trap_inode(struct super_block *sb, struct dentry *dir);
+struct inode *ovl_get_trap_inode(struct super_block *sb, struct dentry *dir);
 struct inode *ovl_get_inode(struct super_block *sb,
 			    struct ovl_inode_params *oip);
 static inline void ovl_copyattr(struct inode *from, struct inode *to)
@@ -419,7 +421,7 @@ extern const struct file_operations ovl_file_operations;
 int ovl_copy_up(struct dentry *dentry);
 int ovl_copy_up_with_data(struct dentry *dentry);
 int ovl_copy_up_flags(struct dentry *dentry, int flags);
-int ovl_open_maybe_copy_up(struct dentry *dentry, unsigned int file_flags);
+int ovl_maybe_copy_up(struct dentry *dentry, int flags);
 int ovl_copy_xattr(struct dentry *old, struct dentry *new);
 int ovl_set_attr(struct dentry *upper, struct kstat *stat);
 struct ovl_fh *ovl_encode_real_fh(struct dentry *real, bool is_upper);
diff --git a/fs/overlayfs/ovl_entry.h b/fs/overlayfs/ovl_entry.h
index ec237035333a..28a2d12a1029 100644
--- a/fs/overlayfs/ovl_entry.h
+++ b/fs/overlayfs/ovl_entry.h
@@ -1,11 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *
  * Copyright (C) 2011 Novell Inc.
  * Copyright (C) 2016 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 struct ovl_config {
@@ -29,6 +26,8 @@ struct ovl_sb {
 
 struct ovl_layer {
 	struct vfsmount *mnt;
+	/* Trap in ovl inode cache */
+	struct inode *trap;
 	struct ovl_sb *fs;
 	/* Index of this layer in fs root (upper idx == 0) */
 	int idx;
@@ -65,6 +64,10 @@ struct ovl_fs {
 	/* Did we take the inuse lock? */
 	bool upperdir_locked;
 	bool workdir_locked;
+	/* Traps in ovl inode cache */
+	struct inode *upperdir_trap;
+	struct inode *workdir_trap;
+	struct inode *indexdir_trap;
 	/* Inode numbers in all layers do not use the high xino_bits */
 	unsigned int xino_bits;
 };
diff --git a/fs/overlayfs/readdir.c b/fs/overlayfs/readdir.c
index cc8303a806b4..47a91c9733a5 100644
--- a/fs/overlayfs/readdir.c
+++ b/fs/overlayfs/readdir.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *
  * Copyright (C) 2011 Novell Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/fs.h>
diff --git a/fs/overlayfs/super.c b/fs/overlayfs/super.c
index 0116735cc321..b368e2e102fa 100644
--- a/fs/overlayfs/super.c
+++ b/fs/overlayfs/super.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *
  * Copyright (C) 2011 Novell Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <uapi/linux/magic.h>
@@ -31,29 +28,29 @@ struct ovl_dir_cache;
 
 static bool ovl_redirect_dir_def = IS_ENABLED(CONFIG_OVERLAY_FS_REDIRECT_DIR);
 module_param_named(redirect_dir, ovl_redirect_dir_def, bool, 0644);
-MODULE_PARM_DESC(ovl_redirect_dir_def,
+MODULE_PARM_DESC(redirect_dir,
 		 "Default to on or off for the redirect_dir feature");
 
 static bool ovl_redirect_always_follow =
 	IS_ENABLED(CONFIG_OVERLAY_FS_REDIRECT_ALWAYS_FOLLOW);
 module_param_named(redirect_always_follow, ovl_redirect_always_follow,
 		   bool, 0644);
-MODULE_PARM_DESC(ovl_redirect_always_follow,
+MODULE_PARM_DESC(redirect_always_follow,
 		 "Follow redirects even if redirect_dir feature is turned off");
 
 static bool ovl_index_def = IS_ENABLED(CONFIG_OVERLAY_FS_INDEX);
 module_param_named(index, ovl_index_def, bool, 0644);
-MODULE_PARM_DESC(ovl_index_def,
+MODULE_PARM_DESC(index,
 		 "Default to on or off for the inodes index feature");
 
 static bool ovl_nfs_export_def = IS_ENABLED(CONFIG_OVERLAY_FS_NFS_EXPORT);
 module_param_named(nfs_export, ovl_nfs_export_def, bool, 0644);
-MODULE_PARM_DESC(ovl_nfs_export_def,
+MODULE_PARM_DESC(nfs_export,
 		 "Default to on or off for the NFS export feature");
 
 static bool ovl_xino_auto_def = IS_ENABLED(CONFIG_OVERLAY_FS_XINO_AUTO);
 module_param_named(xino_auto, ovl_xino_auto_def, bool, 0644);
-MODULE_PARM_DESC(ovl_xino_auto_def,
+MODULE_PARM_DESC(xino_auto,
 		 "Auto enable xino feature");
 
 static void ovl_entry_stack_free(struct ovl_entry *oe)
@@ -66,7 +63,7 @@ static void ovl_entry_stack_free(struct ovl_entry *oe)
 
 static bool ovl_metacopy_def = IS_ENABLED(CONFIG_OVERLAY_FS_METACOPY);
 module_param_named(metacopy, ovl_metacopy_def, bool, 0644);
-MODULE_PARM_DESC(ovl_metacopy_def,
+MODULE_PARM_DESC(metacopy,
 		 "Default to on or off for the metadata only copy up feature");
 
 static void ovl_dentry_release(struct dentry *dentry)
@@ -190,11 +187,13 @@ static struct inode *ovl_alloc_inode(struct super_block *sb)
 	return &oi->vfs_inode;
 }
 
-static void ovl_i_callback(struct rcu_head *head)
+static void ovl_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
+	struct ovl_inode *oi = OVL_I(inode);
 
-	kmem_cache_free(ovl_inode_cachep, OVL_I(inode));
+	kfree(oi->redirect);
+	mutex_destroy(&oi->lock);
+	kmem_cache_free(ovl_inode_cachep, oi);
 }
 
 static void ovl_destroy_inode(struct inode *inode)
@@ -207,16 +206,15 @@ static void ovl_destroy_inode(struct inode *inode)
 		ovl_dir_cache_free(inode);
 	else
 		iput(oi->lowerdata);
-	kfree(oi->redirect);
-	mutex_destroy(&oi->lock);
-
-	call_rcu(&inode->i_rcu, ovl_i_callback);
 }
 
 static void ovl_free_fs(struct ovl_fs *ofs)
 {
 	unsigned i;
 
+	iput(ofs->indexdir_trap);
+	iput(ofs->workdir_trap);
+	iput(ofs->upperdir_trap);
 	dput(ofs->indexdir);
 	dput(ofs->workdir);
 	if (ofs->workdir_locked)
@@ -225,8 +223,10 @@ static void ovl_free_fs(struct ovl_fs *ofs)
 	if (ofs->upperdir_locked)
 		ovl_inuse_unlock(ofs->upper_mnt->mnt_root);
 	mntput(ofs->upper_mnt);
-	for (i = 0; i < ofs->numlower; i++)
+	for (i = 0; i < ofs->numlower; i++) {
+		iput(ofs->lower_layers[i].trap);
 		mntput(ofs->lower_layers[i].mnt);
+	}
 	for (i = 0; i < ofs->numlowerfs; i++)
 		free_anon_bdev(ofs->lower_fs[i].pseudo_dev);
 	kfree(ofs->lower_layers);
@@ -377,6 +377,7 @@ static int ovl_remount(struct super_block *sb, int *flags, char *data)
 
 static const struct super_operations ovl_super_operations = {
 	.alloc_inode	= ovl_alloc_inode,
+	.free_inode	= ovl_free_inode,
 	.destroy_inode	= ovl_destroy_inode,
 	.drop_inode	= generic_delete_inode,
 	.put_super	= ovl_put_super,
@@ -984,7 +985,26 @@ static const struct xattr_handler *ovl_xattr_handlers[] = {
 	NULL
 };
 
-static int ovl_get_upper(struct ovl_fs *ofs, struct path *upperpath)
+static int ovl_setup_trap(struct super_block *sb, struct dentry *dir,
+			  struct inode **ptrap, const char *name)
+{
+	struct inode *trap;
+	int err;
+
+	trap = ovl_get_trap_inode(sb, dir);
+	err = PTR_ERR_OR_ZERO(trap);
+	if (err) {
+		if (err == -ELOOP)
+			pr_err("overlayfs: conflicting %s path\n", name);
+		return err;
+	}
+
+	*ptrap = trap;
+	return 0;
+}
+
+static int ovl_get_upper(struct super_block *sb, struct ovl_fs *ofs,
+			 struct path *upperpath)
 {
 	struct vfsmount *upper_mnt;
 	int err;
@@ -1004,6 +1024,11 @@ static int ovl_get_upper(struct ovl_fs *ofs, struct path *upperpath)
 	if (err)
 		goto out;
 
+	err = ovl_setup_trap(sb, upperpath->dentry, &ofs->upperdir_trap,
+			     "upperdir");
+	if (err)
+		goto out;
+
 	upper_mnt = clone_private_mount(upperpath);
 	err = PTR_ERR(upper_mnt);
 	if (IS_ERR(upper_mnt)) {
@@ -1030,7 +1055,8 @@ out:
 	return err;
 }
 
-static int ovl_make_workdir(struct ovl_fs *ofs, struct path *workpath)
+static int ovl_make_workdir(struct super_block *sb, struct ovl_fs *ofs,
+			    struct path *workpath)
 {
 	struct vfsmount *mnt = ofs->upper_mnt;
 	struct dentry *temp;
@@ -1045,6 +1071,10 @@ static int ovl_make_workdir(struct ovl_fs *ofs, struct path *workpath)
 	if (!ofs->workdir)
 		goto out;
 
+	err = ovl_setup_trap(sb, ofs->workdir, &ofs->workdir_trap, "workdir");
+	if (err)
+		goto out;
+
 	/*
 	 * Upper should support d_type, else whiteouts are visible.  Given
 	 * workdir and upper are on same fs, we can do iterate_dir() on
@@ -1105,7 +1135,8 @@ out:
 	return err;
 }
 
-static int ovl_get_workdir(struct ovl_fs *ofs, struct path *upperpath)
+static int ovl_get_workdir(struct super_block *sb, struct ovl_fs *ofs,
+			   struct path *upperpath)
 {
 	int err;
 	struct path workpath = { };
@@ -1136,19 +1167,16 @@ static int ovl_get_workdir(struct ovl_fs *ofs, struct path *upperpath)
 		pr_warn("overlayfs: workdir is in-use by another mount, accessing files from both mounts will result in undefined behavior.\n");
 	}
 
-	err = ovl_make_workdir(ofs, &workpath);
-	if (err)
-		goto out;
+	err = ovl_make_workdir(sb, ofs, &workpath);
 
-	err = 0;
 out:
 	path_put(&workpath);
 
 	return err;
 }
 
-static int ovl_get_indexdir(struct ovl_fs *ofs, struct ovl_entry *oe,
-			    struct path *upperpath)
+static int ovl_get_indexdir(struct super_block *sb, struct ovl_fs *ofs,
+			    struct ovl_entry *oe, struct path *upperpath)
 {
 	struct vfsmount *mnt = ofs->upper_mnt;
 	int err;
@@ -1167,6 +1195,11 @@ static int ovl_get_indexdir(struct ovl_fs *ofs, struct ovl_entry *oe,
 
 	ofs->indexdir = ovl_workdir_create(ofs, OVL_INDEXDIR_NAME, true);
 	if (ofs->indexdir) {
+		err = ovl_setup_trap(sb, ofs->indexdir, &ofs->indexdir_trap,
+				     "indexdir");
+		if (err)
+			goto out;
+
 		/*
 		 * Verify upper root is exclusively associated with index dir.
 		 * Older kernels stored upper fh in "trusted.overlay.origin"
@@ -1254,8 +1287,8 @@ static int ovl_get_fsid(struct ovl_fs *ofs, const struct path *path)
 	return ofs->numlowerfs;
 }
 
-static int ovl_get_lower_layers(struct ovl_fs *ofs, struct path *stack,
-				unsigned int numlower)
+static int ovl_get_lower_layers(struct super_block *sb, struct ovl_fs *ofs,
+				struct path *stack, unsigned int numlower)
 {
 	int err;
 	unsigned int i;
@@ -1273,16 +1306,28 @@ static int ovl_get_lower_layers(struct ovl_fs *ofs, struct path *stack,
 
 	for (i = 0; i < numlower; i++) {
 		struct vfsmount *mnt;
+		struct inode *trap;
 		int fsid;
 
 		err = fsid = ovl_get_fsid(ofs, &stack[i]);
 		if (err < 0)
 			goto out;
 
+		err = -EBUSY;
+		if (ovl_is_inuse(stack[i].dentry)) {
+			pr_err("overlayfs: lowerdir is in-use as upperdir/workdir\n");
+			goto out;
+		}
+
+		err = ovl_setup_trap(sb, stack[i].dentry, &trap, "lowerdir");
+		if (err)
+			goto out;
+
 		mnt = clone_private_mount(&stack[i]);
 		err = PTR_ERR(mnt);
 		if (IS_ERR(mnt)) {
 			pr_err("overlayfs: failed to clone lowerpath\n");
+			iput(trap);
 			goto out;
 		}
 
@@ -1292,6 +1337,7 @@ static int ovl_get_lower_layers(struct ovl_fs *ofs, struct path *stack,
 		 */
 		mnt->mnt_flags |= MNT_READONLY | MNT_NOATIME;
 
+		ofs->lower_layers[ofs->numlower].trap = trap;
 		ofs->lower_layers[ofs->numlower].mnt = mnt;
 		ofs->lower_layers[ofs->numlower].idx = i + 1;
 		ofs->lower_layers[ofs->numlower].fsid = fsid;
@@ -1386,7 +1432,7 @@ static struct ovl_entry *ovl_get_lowerstack(struct super_block *sb,
 		goto out_err;
 	}
 
-	err = ovl_get_lower_layers(ofs, stack, numlower);
+	err = ovl_get_lower_layers(sb, ofs, stack, numlower);
 	if (err)
 		goto out_err;
 
@@ -1418,6 +1464,77 @@ out_err:
 	goto out;
 }
 
+/*
+ * Check if this layer root is a descendant of:
+ * - another layer of this overlayfs instance
+ * - upper/work dir of any overlayfs instance
+ */
+static int ovl_check_layer(struct super_block *sb, struct dentry *dentry,
+			   const char *name)
+{
+	struct dentry *next = dentry, *parent;
+	int err = 0;
+
+	if (!dentry)
+		return 0;
+
+	parent = dget_parent(next);
+
+	/* Walk back ancestors to root (inclusive) looking for traps */
+	while (!err && parent != next) {
+		if (ovl_is_inuse(parent)) {
+			err = -EBUSY;
+			pr_err("overlayfs: %s path overlapping in-use upperdir/workdir\n",
+			       name);
+		} else if (ovl_lookup_trap_inode(sb, parent)) {
+			err = -ELOOP;
+			pr_err("overlayfs: overlapping %s path\n", name);
+		}
+		next = parent;
+		parent = dget_parent(next);
+		dput(next);
+	}
+
+	dput(parent);
+
+	return err;
+}
+
+/*
+ * Check if any of the layers or work dirs overlap.
+ */
+static int ovl_check_overlapping_layers(struct super_block *sb,
+					struct ovl_fs *ofs)
+{
+	int i, err;
+
+	if (ofs->upper_mnt) {
+		err = ovl_check_layer(sb, ofs->upper_mnt->mnt_root, "upperdir");
+		if (err)
+			return err;
+
+		/*
+		 * Checking workbasedir avoids hitting ovl_is_inuse(parent) of
+		 * this instance and covers overlapping work and index dirs,
+		 * unless work or index dir have been moved since created inside
+		 * workbasedir.  In that case, we already have their traps in
+		 * inode cache and we will catch that case on lookup.
+		 */
+		err = ovl_check_layer(sb, ofs->workbasedir, "workdir");
+		if (err)
+			return err;
+	}
+
+	for (i = 0; i < ofs->numlower; i++) {
+		err = ovl_check_layer(sb, ofs->lower_layers[i].mnt->mnt_root,
+				      "lowerdir");
+		if (err)
+			return err;
+	}
+
+	return 0;
+}
+
 static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 {
 	struct path upperpath = { };
@@ -1457,17 +1574,20 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 	if (ofs->config.xino != OVL_XINO_OFF)
 		ofs->xino_bits = BITS_PER_LONG - 32;
 
+	/* alloc/destroy_inode needed for setting up traps in inode cache */
+	sb->s_op = &ovl_super_operations;
+
 	if (ofs->config.upperdir) {
 		if (!ofs->config.workdir) {
 			pr_err("overlayfs: missing 'workdir'\n");
 			goto out_err;
 		}
 
-		err = ovl_get_upper(ofs, &upperpath);
+		err = ovl_get_upper(sb, ofs, &upperpath);
 		if (err)
 			goto out_err;
 
-		err = ovl_get_workdir(ofs, &upperpath);
+		err = ovl_get_workdir(sb, ofs, &upperpath);
 		if (err)
 			goto out_err;
 
@@ -1488,7 +1608,7 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 		sb->s_flags |= SB_RDONLY;
 
 	if (!(ovl_force_readonly(ofs)) && ofs->config.index) {
-		err = ovl_get_indexdir(ofs, oe, &upperpath);
+		err = ovl_get_indexdir(sb, ofs, oe, &upperpath);
 		if (err)
 			goto out_free_oe;
 
@@ -1501,6 +1621,10 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 
 	}
 
+	err = ovl_check_overlapping_layers(sb, ofs);
+	if (err)
+		goto out_free_oe;
+
 	/* Show index=off in /proc/mounts for forced r/o mount */
 	if (!ofs->indexdir) {
 		ofs->config.index = false;
@@ -1522,7 +1646,6 @@ static int ovl_fill_super(struct super_block *sb, void *data, int silent)
 	cap_lower(cred->cap_effective, CAP_SYS_RESOURCE);
 
 	sb->s_magic = OVERLAYFS_SUPER_MAGIC;
-	sb->s_op = &ovl_super_operations;
 	sb->s_xattr = ovl_xattr_handlers;
 	sb->s_fs_info = ofs;
 	sb->s_flags |= SB_POSIXACL;
diff --git a/fs/overlayfs/util.c b/fs/overlayfs/util.c
index 7c01327b1852..f5678a3f8350 100644
--- a/fs/overlayfs/util.c
+++ b/fs/overlayfs/util.c
@@ -1,10 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2011 Novell Inc.
  * Copyright (C) 2016 Red Hat, Inc.
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
  */
 
 #include <linux/fs.h>
@@ -652,6 +649,18 @@ void ovl_inuse_unlock(struct dentry *dentry)
 	}
 }
 
+bool ovl_is_inuse(struct dentry *dentry)
+{
+	struct inode *inode = d_inode(dentry);
+	bool inuse;
+
+	spin_lock(&inode->i_lock);
+	inuse = (inode->i_state & I_OVL_INUSE);
+	spin_unlock(&inode->i_lock);
+
+	return inuse;
+}
+
 /*
  * Does this overlay dentry need to be indexed on copy up?
  */
@@ -863,28 +872,49 @@ bool ovl_is_metacopy_dentry(struct dentry *dentry)
 	return (oe->numlower > 1);
 }
 
-char *ovl_get_redirect_xattr(struct dentry *dentry, int padding)
+ssize_t ovl_getxattr(struct dentry *dentry, char *name, char **value,
+		     size_t padding)
 {
-	int res;
-	char *s, *next, *buf = NULL;
+	ssize_t res;
+	char *buf = NULL;
 
-	res = vfs_getxattr(dentry, OVL_XATTR_REDIRECT, NULL, 0);
+	res = vfs_getxattr(dentry, name, NULL, 0);
 	if (res < 0) {
 		if (res == -ENODATA || res == -EOPNOTSUPP)
-			return NULL;
+			return -ENODATA;
 		goto fail;
 	}
 
-	buf = kzalloc(res + padding + 1, GFP_KERNEL);
-	if (!buf)
-		return ERR_PTR(-ENOMEM);
+	if (res != 0) {
+		buf = kzalloc(res + padding, GFP_KERNEL);
+		if (!buf)
+			return -ENOMEM;
 
-	if (res == 0)
-		goto invalid;
+		res = vfs_getxattr(dentry, name, buf, res);
+		if (res < 0)
+			goto fail;
+	}
+	*value = buf;
+
+	return res;
 
-	res = vfs_getxattr(dentry, OVL_XATTR_REDIRECT, buf, res);
+fail:
+	pr_warn_ratelimited("overlayfs: failed to get xattr %s: err=%zi)\n",
+			    name, res);
+	kfree(buf);
+	return res;
+}
+
+char *ovl_get_redirect_xattr(struct dentry *dentry, int padding)
+{
+	int res;
+	char *s, *next, *buf = NULL;
+
+	res = ovl_getxattr(dentry, OVL_XATTR_REDIRECT, &buf, padding + 1);
+	if (res == -ENODATA)
+		return NULL;
 	if (res < 0)
-		goto fail;
+		return ERR_PTR(res);
 	if (res == 0)
 		goto invalid;
 
@@ -900,15 +930,9 @@ char *ovl_get_redirect_xattr(struct dentry *dentry, int padding)
 	}
 
 	return buf;
-
-err_free:
-	kfree(buf);
-	return ERR_PTR(res);
-fail:
-	pr_warn_ratelimited("overlayfs: failed to get redirect (%i)\n", res);
-	goto err_free;
 invalid:
 	pr_warn_ratelimited("overlayfs: invalid redirect (%s)\n", buf);
 	res = -EINVAL;
-	goto err_free;
+	kfree(buf);
+	return ERR_PTR(res);
 }
diff --git a/fs/pipe.c b/fs/pipe.c
index bdc5d3c0977d..41065901106b 100644
--- a/fs/pipe.c
+++ b/fs/pipe.c
@@ -140,8 +140,7 @@ static int anon_pipe_buf_steal(struct pipe_inode_info *pipe,
 	struct page *page = buf->page;
 
 	if (page_count(page) == 1) {
-		if (memcg_kmem_enabled())
-			memcg_kmem_uncharge(page, 0);
+		memcg_kmem_uncharge(page, 0);
 		__SetPageLocked(page);
 		return 0;
 	}
@@ -189,9 +188,9 @@ EXPORT_SYMBOL(generic_pipe_buf_steal);
  *	in the tee() system call, when we duplicate the buffers in one
  *	pipe into another.
  */
-void generic_pipe_buf_get(struct pipe_inode_info *pipe, struct pipe_buffer *buf)
+bool generic_pipe_buf_get(struct pipe_inode_info *pipe, struct pipe_buffer *buf)
 {
-	get_page(buf->page);
+	return try_get_page(buf->page);
 }
 EXPORT_SYMBOL(generic_pipe_buf_get);
 
@@ -226,8 +225,15 @@ void generic_pipe_buf_release(struct pipe_inode_info *pipe,
 }
 EXPORT_SYMBOL(generic_pipe_buf_release);
 
+/* New data written to a pipe may be appended to a buffer with this type. */
 static const struct pipe_buf_operations anon_pipe_buf_ops = {
-	.can_merge = 1,
+	.confirm = generic_pipe_buf_confirm,
+	.release = anon_pipe_buf_release,
+	.steal = anon_pipe_buf_steal,
+	.get = generic_pipe_buf_get,
+};
+
+static const struct pipe_buf_operations anon_pipe_buf_nomerge_ops = {
 	.confirm = generic_pipe_buf_confirm,
 	.release = anon_pipe_buf_release,
 	.steal = anon_pipe_buf_steal,
@@ -235,13 +241,32 @@ static const struct pipe_buf_operations anon_pipe_buf_ops = {
 };
 
 static const struct pipe_buf_operations packet_pipe_buf_ops = {
-	.can_merge = 0,
 	.confirm = generic_pipe_buf_confirm,
 	.release = anon_pipe_buf_release,
 	.steal = anon_pipe_buf_steal,
 	.get = generic_pipe_buf_get,
 };
 
+/**
+ * pipe_buf_mark_unmergeable - mark a &struct pipe_buffer as unmergeable
+ * @buf:	the buffer to mark
+ *
+ * Description:
+ *	This function ensures that no future writes will be merged into the
+ *	given &struct pipe_buffer. This is necessary when multiple pipe buffers
+ *	share the same backing page.
+ */
+void pipe_buf_mark_unmergeable(struct pipe_buffer *buf)
+{
+	if (buf->ops == &anon_pipe_buf_ops)
+		buf->ops = &anon_pipe_buf_nomerge_ops;
+}
+
+static bool pipe_buf_can_merge(struct pipe_buffer *buf)
+{
+	return buf->ops == &anon_pipe_buf_ops;
+}
+
 static ssize_t
 pipe_read(struct kiocb *iocb, struct iov_iter *to)
 {
@@ -379,7 +404,7 @@ pipe_write(struct kiocb *iocb, struct iov_iter *from)
 		struct pipe_buffer *buf = pipe->bufs + lastbuf;
 		int offset = buf->offset + buf->len;
 
-		if (buf->ops->can_merge && offset + chars <= PAGE_SIZE) {
+		if (pipe_buf_can_merge(buf) && offset + chars <= PAGE_SIZE) {
 			ret = pipe_buf_confirm(pipe, buf);
 			if (ret)
 				goto out;
diff --git a/fs/pnode.c b/fs/pnode.c
index 1100e810d855..49f6d7ff2139 100644
--- a/fs/pnode.c
+++ b/fs/pnode.c
@@ -1,10 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/pnode.c
  *
  * (C) Copyright IBM Corporation 2005.
- *	Released under GPL v2.
  *	Author : Ram Pai (linuxram@us.ibm.com)
- *
  */
 #include <linux/mnt_namespace.h>
 #include <linux/mount.h>
@@ -214,7 +213,6 @@ static struct mount *next_group(struct mount *m, struct mount *origin)
 }
 
 /* all accesses are serialized by namespace_sem */
-static struct user_namespace *user_ns;
 static struct mount *last_dest, *first_source, *last_source, *dest_master;
 static struct mountpoint *mp;
 static struct hlist_head *list;
@@ -260,13 +258,9 @@ static int propagate_one(struct mount *m)
 			type |= CL_MAKE_SHARED;
 	}
 		
-	/* Notice when we are propagating across user namespaces */
-	if (m->mnt_ns->user_ns != user_ns)
-		type |= CL_UNPRIVILEGED;
 	child = copy_tree(last_source, last_source->mnt.mnt_root, type);
 	if (IS_ERR(child))
 		return PTR_ERR(child);
-	child->mnt.mnt_flags &= ~MNT_LOCKED;
 	mnt_set_mountpoint(m, mp, child);
 	last_dest = m;
 	last_source = child;
@@ -303,7 +297,6 @@ int propagate_mnt(struct mount *dest_mnt, struct mountpoint *dest_mp,
 	 * propagate_one(); everything is serialized by namespace_sem,
 	 * so globals will do just fine.
 	 */
-	user_ns = current->nsproxy->mnt_ns->user_ns;
 	last_dest = dest_mnt;
 	first_source = source_mnt;
 	last_source = source_mnt;
diff --git a/fs/pnode.h b/fs/pnode.h
index dc87e65becd2..49a058c73e4c 100644
--- a/fs/pnode.h
+++ b/fs/pnode.h
@@ -1,9 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  *  linux/fs/pnode.h
  *
  * (C) Copyright IBM Corporation 2005.
- *	Released under GPL v2.
- *
  */
 #ifndef _LINUX_PNODE_H
 #define _LINUX_PNODE_H
@@ -27,8 +26,7 @@
 #define CL_MAKE_SHARED 		0x08
 #define CL_PRIVATE 		0x10
 #define CL_SHARED_TO_SLAVE	0x20
-#define CL_UNPRIVILEGED		0x40
-#define CL_COPY_MNT_NS_FILE	0x80
+#define CL_COPY_MNT_NS_FILE	0x40
 
 #define CL_COPY_ALL		(CL_COPY_UNBINDABLE | CL_COPY_MNT_NS_FILE)
 
diff --git a/fs/posix_acl.c b/fs/posix_acl.c
index 2fd0fde16fe1..84ad1c90d535 100644
--- a/fs/posix_acl.c
+++ b/fs/posix_acl.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2002,2003 by Andreas Gruenbacher <a.gruenbacher@computer.org>
  *
diff --git a/fs/proc/Kconfig b/fs/proc/Kconfig
index 817c02b13b1d..4c3dcb718961 100644
--- a/fs/proc/Kconfig
+++ b/fs/proc/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config PROC_FS
 	bool "/proc file system support" if EXPERT
 	default y
@@ -97,3 +98,7 @@ config PROC_CHILDREN
 
 	  Say Y if you are running any user-space software which takes benefit from
 	  this interface. For example, rkt is such a piece of software.
+
+config PROC_PID_ARCH_STATUS
+	def_bool n
+	depends on PROC_FS
diff --git a/fs/proc/array.c b/fs/proc/array.c
index 9d428d5a0ac8..46dcb6f0eccf 100644
--- a/fs/proc/array.c
+++ b/fs/proc/array.c
@@ -343,28 +343,28 @@ static inline void task_seccomp(struct seq_file *m, struct task_struct *p)
 #ifdef CONFIG_SECCOMP
 	seq_put_decimal_ull(m, "\nSeccomp:\t", p->seccomp.mode);
 #endif
-	seq_printf(m, "\nSpeculation_Store_Bypass:\t");
+	seq_puts(m, "\nSpeculation_Store_Bypass:\t");
 	switch (arch_prctl_spec_ctrl_get(p, PR_SPEC_STORE_BYPASS)) {
 	case -EINVAL:
-		seq_printf(m, "unknown");
+		seq_puts(m, "unknown");
 		break;
 	case PR_SPEC_NOT_AFFECTED:
-		seq_printf(m, "not vulnerable");
+		seq_puts(m, "not vulnerable");
 		break;
 	case PR_SPEC_PRCTL | PR_SPEC_FORCE_DISABLE:
-		seq_printf(m, "thread force mitigated");
+		seq_puts(m, "thread force mitigated");
 		break;
 	case PR_SPEC_PRCTL | PR_SPEC_DISABLE:
-		seq_printf(m, "thread mitigated");
+		seq_puts(m, "thread mitigated");
 		break;
 	case PR_SPEC_PRCTL | PR_SPEC_ENABLE:
-		seq_printf(m, "thread vulnerable");
+		seq_puts(m, "thread vulnerable");
 		break;
 	case PR_SPEC_DISABLE:
-		seq_printf(m, "globally mitigated");
+		seq_puts(m, "globally mitigated");
 		break;
 	default:
-		seq_printf(m, "vulnerable");
+		seq_puts(m, "vulnerable");
 		break;
 	}
 	seq_putc(m, '\n');
@@ -381,9 +381,9 @@ static inline void task_context_switch_counts(struct seq_file *m,
 static void task_cpus_allowed(struct seq_file *m, struct task_struct *task)
 {
 	seq_printf(m, "Cpus_allowed:\t%*pb\n",
-		   cpumask_pr_args(&task->cpus_allowed));
+		   cpumask_pr_args(task->cpus_ptr));
 	seq_printf(m, "Cpus_allowed_list:\t%*pbl\n",
-		   cpumask_pr_args(&task->cpus_allowed));
+		   cpumask_pr_args(task->cpus_ptr));
 }
 
 static inline void task_core_dumping(struct seq_file *m, struct mm_struct *mm)
@@ -462,7 +462,7 @@ static int do_task_stat(struct seq_file *m, struct pid_namespace *ns,
 		 * a program is not able to use ptrace(2) in that case. It is
 		 * safe because the task has stopped executing permanently.
 		 */
-		if (permitted && (task->flags & PF_DUMPCORE)) {
+		if (permitted && (task->flags & (PF_EXITING|PF_DUMPCORE))) {
 			if (try_get_task_stack(task)) {
 				eip = KSTK_EIP(task);
 				esp = KSTK_ESP(task);
diff --git a/fs/proc/base.c b/fs/proc/base.c
index 633a63462573..77eb628ecc7f 100644
--- a/fs/proc/base.c
+++ b/fs/proc/base.c
@@ -59,6 +59,7 @@
 #include <linux/capability.h>
 #include <linux/file.h>
 #include <linux/fdtable.h>
+#include <linux/generic-radix-tree.h>
 #include <linux/string.h>
 #include <linux/seq_file.h>
 #include <linux/namei.h>
@@ -92,7 +93,6 @@
 #include <linux/sched/coredump.h>
 #include <linux/sched/debug.h>
 #include <linux/sched/stat.h>
-#include <linux/flex_array.h>
 #include <linux/posix-timers.h>
 #include <trace/events/oom.h>
 #include "internal.h"
@@ -140,9 +140,13 @@ struct pid_entry {
 #define REG(NAME, MODE, fops)				\
 	NOD(NAME, (S_IFREG|(MODE)), NULL, &fops, {})
 #define ONE(NAME, MODE, show)				\
-	NOD(NAME, (S_IFREG|(MODE)), 			\
+	NOD(NAME, (S_IFREG|(MODE)),			\
 		NULL, &proc_single_file_operations,	\
 		{ .proc_show = show } )
+#define ATTR(LSM, NAME, MODE)				\
+	NOD(NAME, (S_IFREG|(MODE)),			\
+		NULL, &proc_pid_attr_operations,	\
+		{ .lsm = LSM })
 
 /*
  * Count the number of hardlinks for the pid_entry table, excluding the .
@@ -403,7 +407,6 @@ static void unlock_trace(struct task_struct *task)
 static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns,
 			  struct pid *pid, struct task_struct *task)
 {
-	struct stack_trace trace;
 	unsigned long *entries;
 	int err;
 
@@ -426,20 +429,17 @@ static int proc_pid_stack(struct seq_file *m, struct pid_namespace *ns,
 	if (!entries)
 		return -ENOMEM;
 
-	trace.nr_entries	= 0;
-	trace.max_entries	= MAX_STACK_TRACE_DEPTH;
-	trace.entries		= entries;
-	trace.skip		= 0;
-
 	err = lock_trace(task);
 	if (!err) {
-		unsigned int i;
+		unsigned int i, nr_entries;
 
-		save_stack_trace_tsk(task, &trace);
+		nr_entries = stack_trace_save_tsk(task, entries,
+						  MAX_STACK_TRACE_DEPTH, 0);
 
-		for (i = 0; i < trace.nr_entries; i++) {
+		for (i = 0; i < nr_entries; i++) {
 			seq_printf(m, "[<0>] %pB\n", (void *)entries[i]);
 		}
+
 		unlock_trace(task);
 	}
 	kfree(entries);
@@ -456,7 +456,7 @@ static int proc_pid_schedstat(struct seq_file *m, struct pid_namespace *ns,
 			      struct pid *pid, struct task_struct *task)
 {
 	if (unlikely(!sched_info_on()))
-		seq_printf(m, "0 0 0\n");
+		seq_puts(m, "0 0 0\n");
 	else
 		seq_printf(m, "%llu %llu %lu\n",
 		   (unsigned long long)task->se.sum_exec_runtime,
@@ -485,10 +485,9 @@ static int lstats_show_proc(struct seq_file *m, void *v)
 				   lr->count, lr->time, lr->max);
 			for (q = 0; q < LT_BACKTRACEDEPTH; q++) {
 				unsigned long bt = lr->backtrace[q];
+
 				if (!bt)
 					break;
-				if (bt == ULONG_MAX)
-					break;
 				seq_printf(m, " %ps", (void *)bt);
 			}
 			seq_putc(m, '\n');
@@ -511,7 +510,7 @@ static ssize_t lstats_write(struct file *file, const char __user *buf,
 
 	if (!task)
 		return -ESRCH;
-	clear_all_latency_tracing(task);
+	clear_tsk_latency_tracing(task);
 	put_task_struct(task);
 
 	return count;
@@ -533,8 +532,7 @@ static int proc_oom_score(struct seq_file *m, struct pid_namespace *ns,
 	unsigned long totalpages = totalram_pages() + total_swap_pages;
 	unsigned long points = 0;
 
-	points = oom_badness(task, NULL, NULL, totalpages) *
-					1000 / totalpages;
+	points = oom_badness(task, totalpages) * 1000 / totalpages;
 	seq_printf(m, "%lu\n", points);
 
 	return 0;
@@ -612,24 +610,25 @@ static int proc_pid_limits(struct seq_file *m, struct pid_namespace *ns,
 static int proc_pid_syscall(struct seq_file *m, struct pid_namespace *ns,
 			    struct pid *pid, struct task_struct *task)
 {
-	long nr;
-	unsigned long args[6], sp, pc;
+	struct syscall_info info;
+	u64 *args = &info.data.args[0];
 	int res;
 
 	res = lock_trace(task);
 	if (res)
 		return res;
 
-	if (task_current_syscall(task, &nr, args, 6, &sp, &pc))
+	if (task_current_syscall(task, &info))
 		seq_puts(m, "running\n");
-	else if (nr < 0)
-		seq_printf(m, "%ld 0x%lx 0x%lx\n", nr, sp, pc);
+	else if (info.data.nr < 0)
+		seq_printf(m, "%d 0x%llx 0x%llx\n",
+			   info.data.nr, info.sp, info.data.instruction_pointer);
 	else
 		seq_printf(m,
-		       "%ld 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx 0x%lx\n",
-		       nr,
+		       "%d 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx 0x%llx\n",
+		       info.data.nr,
 		       args[0], args[1], args[2], args[3], args[4], args[5],
-		       sp, pc);
+		       info.sp, info.data.instruction_pointer);
 	unlock_trace(task);
 
 	return 0;
@@ -1086,10 +1085,6 @@ static int __set_oom_adj(struct file *file, int oom_adj, bool legacy)
 
 			task_lock(p);
 			if (!p->vfork_done && process_shares_mm(p, mm)) {
-				pr_info("updating oom_score_adj for %d (%s) from %d to %d because it shares mm with %d (%s). Report if this is unexpected.\n",
-						task_pid_nr(p), p->comm,
-						p->signal->oom_score_adj, oom_adj,
-						task_pid_nr(task), task->comm);
 				p->signal->oom_score_adj = oom_adj;
 				if (!legacy && has_capability_noaudit(current, CAP_SYS_RESOURCE))
 					p->signal->oom_score_adj_min = (short)oom_adj;
@@ -1210,7 +1205,7 @@ static const struct file_operations proc_oom_score_adj_operations = {
 	.llseek		= default_llseek,
 };
 
-#ifdef CONFIG_AUDITSYSCALL
+#ifdef CONFIG_AUDIT
 #define TMPBUFLEN 11
 static ssize_t proc_loginuid_read(struct file * file, char __user * buf,
 				  size_t count, loff_t *ppos)
@@ -1966,9 +1961,12 @@ static int map_files_d_revalidate(struct dentry *dentry, unsigned int flags)
 		goto out;
 
 	if (!dname_to_vma_addr(dentry, &vm_start, &vm_end)) {
-		down_read(&mm->mmap_sem);
-		exact_vma_exists = !!find_exact_vma(mm, vm_start, vm_end);
-		up_read(&mm->mmap_sem);
+		status = down_read_killable(&mm->mmap_sem);
+		if (!status) {
+			exact_vma_exists = !!find_exact_vma(mm, vm_start,
+							    vm_end);
+			up_read(&mm->mmap_sem);
+		}
 	}
 
 	mmput(mm);
@@ -2014,8 +2012,11 @@ static int map_files_get_link(struct dentry *dentry, struct path *path)
 	if (rc)
 		goto out_mmput;
 
+	rc = down_read_killable(&mm->mmap_sem);
+	if (rc)
+		goto out_mmput;
+
 	rc = -ENOENT;
-	down_read(&mm->mmap_sem);
 	vma = find_exact_vma(mm, vm_start, vm_end);
 	if (vma && vma->vm_file) {
 		*path = vma->vm_file->f_path;
@@ -2111,7 +2112,11 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
 	if (!mm)
 		goto out_put_task;
 
-	down_read(&mm->mmap_sem);
+	result = ERR_PTR(-EINTR);
+	if (down_read_killable(&mm->mmap_sem))
+		goto out_put_mm;
+
+	result = ERR_PTR(-ENOENT);
 	vma = find_exact_vma(mm, vm_start, vm_end);
 	if (!vma)
 		goto out_no_vma;
@@ -2122,6 +2127,7 @@ static struct dentry *proc_map_files_lookup(struct inode *dir,
 
 out_no_vma:
 	up_read(&mm->mmap_sem);
+out_put_mm:
 	mmput(mm);
 out_put_task:
 	put_task_struct(task);
@@ -2142,11 +2148,12 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 	struct task_struct *task;
 	struct mm_struct *mm;
 	unsigned long nr_files, pos, i;
-	struct flex_array *fa = NULL;
-	struct map_files_info info;
+	GENRADIX(struct map_files_info) fa;
 	struct map_files_info *p;
 	int ret;
 
+	genradix_init(&fa);
+
 	ret = -ENOENT;
 	task = get_proc_task(file_inode(file));
 	if (!task)
@@ -2163,7 +2170,12 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 	mm = get_task_mm(task);
 	if (!mm)
 		goto out_put_task;
-	down_read(&mm->mmap_sem);
+
+	ret = down_read_killable(&mm->mmap_sem);
+	if (ret) {
+		mmput(mm);
+		goto out_put_task;
+	}
 
 	nr_files = 0;
 
@@ -2178,35 +2190,22 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 	 */
 
 	for (vma = mm->mmap, pos = 2; vma; vma = vma->vm_next) {
-		if (vma->vm_file && ++pos > ctx->pos)
-			nr_files++;
-	}
+		if (!vma->vm_file)
+			continue;
+		if (++pos <= ctx->pos)
+			continue;
 
-	if (nr_files) {
-		fa = flex_array_alloc(sizeof(info), nr_files,
-					GFP_KERNEL);
-		if (!fa || flex_array_prealloc(fa, 0, nr_files,
-						GFP_KERNEL)) {
+		p = genradix_ptr_alloc(&fa, nr_files++, GFP_KERNEL);
+		if (!p) {
 			ret = -ENOMEM;
-			if (fa)
-				flex_array_free(fa);
 			up_read(&mm->mmap_sem);
 			mmput(mm);
 			goto out_put_task;
 		}
-		for (i = 0, vma = mm->mmap, pos = 2; vma;
-				vma = vma->vm_next) {
-			if (!vma->vm_file)
-				continue;
-			if (++pos <= ctx->pos)
-				continue;
 
-			info.start = vma->vm_start;
-			info.end = vma->vm_end;
-			info.mode = vma->vm_file->f_mode;
-			if (flex_array_put(fa, i++, &info, GFP_KERNEL))
-				BUG();
-		}
+		p->start = vma->vm_start;
+		p->end = vma->vm_end;
+		p->mode = vma->vm_file->f_mode;
 	}
 	up_read(&mm->mmap_sem);
 	mmput(mm);
@@ -2215,7 +2214,7 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 		char buf[4 * sizeof(long) + 2];	/* max: %lx-%lx\0 */
 		unsigned int len;
 
-		p = flex_array_get(fa, i);
+		p = genradix_ptr(&fa, i);
 		len = snprintf(buf, sizeof(buf), "%lx-%lx", p->start, p->end);
 		if (!proc_fill_cache(file, ctx,
 				      buf, len,
@@ -2225,12 +2224,11 @@ proc_map_files_readdir(struct file *file, struct dir_context *ctx)
 			break;
 		ctx->pos++;
 	}
-	if (fa)
-		flex_array_free(fa);
 
 out_put_task:
 	put_task_struct(task);
 out:
+	genradix_free(&fa);
 	return ret;
 }
 
@@ -2459,11 +2457,10 @@ static struct dentry *proc_pident_instantiate(struct dentry *dentry,
 
 static struct dentry *proc_pident_lookup(struct inode *dir, 
 					 struct dentry *dentry,
-					 const struct pid_entry *ents,
-					 unsigned int nents)
+					 const struct pid_entry *p,
+					 const struct pid_entry *end)
 {
 	struct task_struct *task = get_proc_task(dir);
-	const struct pid_entry *p, *last;
 	struct dentry *res = ERR_PTR(-ENOENT);
 
 	if (!task)
@@ -2473,8 +2470,7 @@ static struct dentry *proc_pident_lookup(struct inode *dir,
 	 * Yes, it does not scale. And it should not. Don't add
 	 * new entries into /proc/<tgid>/ without very good reasons.
 	 */
-	last = &ents[nents];
-	for (p = ents; p < last; p++) {
+	for (; p < end; p++) {
 		if (p->len != dentry->d_name.len)
 			continue;
 		if (!memcmp(dentry->d_name.name, p->name, p->len)) {
@@ -2525,7 +2521,7 @@ static ssize_t proc_pid_attr_read(struct file * file, char __user * buf,
 	if (!task)
 		return -ESRCH;
 
-	length = security_getprocattr(task,
+	length = security_getprocattr(task, PROC_I(inode)->op.lsm,
 				      (char*)file->f_path.dentry->d_name.name,
 				      &p);
 	put_task_struct(task);
@@ -2554,6 +2550,11 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
 		rcu_read_unlock();
 		return -EACCES;
 	}
+	/* Prevent changes to overridden credentials. */
+	if (current_cred() != current_real_cred()) {
+		rcu_read_unlock();
+		return -EBUSY;
+	}
 	rcu_read_unlock();
 
 	if (count > PAGE_SIZE)
@@ -2574,7 +2575,9 @@ static ssize_t proc_pid_attr_write(struct file * file, const char __user * buf,
 	if (rv < 0)
 		goto out_free;
 
-	rv = security_setprocattr(file->f_path.dentry->d_name.name, page, count);
+	rv = security_setprocattr(PROC_I(inode)->op.lsm,
+				  file->f_path.dentry->d_name.name, page,
+				  count);
 	mutex_unlock(&current->signal->cred_guard_mutex);
 out_free:
 	kfree(page);
@@ -2588,13 +2591,53 @@ static const struct file_operations proc_pid_attr_operations = {
 	.llseek		= generic_file_llseek,
 };
 
+#define LSM_DIR_OPS(LSM) \
+static int proc_##LSM##_attr_dir_iterate(struct file *filp, \
+			     struct dir_context *ctx) \
+{ \
+	return proc_pident_readdir(filp, ctx, \
+				   LSM##_attr_dir_stuff, \
+				   ARRAY_SIZE(LSM##_attr_dir_stuff)); \
+} \
+\
+static const struct file_operations proc_##LSM##_attr_dir_ops = { \
+	.read		= generic_read_dir, \
+	.iterate	= proc_##LSM##_attr_dir_iterate, \
+	.llseek		= default_llseek, \
+}; \
+\
+static struct dentry *proc_##LSM##_attr_dir_lookup(struct inode *dir, \
+				struct dentry *dentry, unsigned int flags) \
+{ \
+	return proc_pident_lookup(dir, dentry, \
+				  LSM##_attr_dir_stuff, \
+				  LSM##_attr_dir_stuff + ARRAY_SIZE(LSM##_attr_dir_stuff)); \
+} \
+\
+static const struct inode_operations proc_##LSM##_attr_dir_inode_ops = { \
+	.lookup		= proc_##LSM##_attr_dir_lookup, \
+	.getattr	= pid_getattr, \
+	.setattr	= proc_setattr, \
+}
+
+#ifdef CONFIG_SECURITY_SMACK
+static const struct pid_entry smack_attr_dir_stuff[] = {
+	ATTR("smack", "current",	0666),
+};
+LSM_DIR_OPS(smack);
+#endif
+
 static const struct pid_entry attr_dir_stuff[] = {
-	REG("current",    S_IRUGO|S_IWUGO, proc_pid_attr_operations),
-	REG("prev",       S_IRUGO,	   proc_pid_attr_operations),
-	REG("exec",       S_IRUGO|S_IWUGO, proc_pid_attr_operations),
-	REG("fscreate",   S_IRUGO|S_IWUGO, proc_pid_attr_operations),
-	REG("keycreate",  S_IRUGO|S_IWUGO, proc_pid_attr_operations),
-	REG("sockcreate", S_IRUGO|S_IWUGO, proc_pid_attr_operations),
+	ATTR(NULL, "current",		0666),
+	ATTR(NULL, "prev",		0444),
+	ATTR(NULL, "exec",		0666),
+	ATTR(NULL, "fscreate",		0666),
+	ATTR(NULL, "keycreate",		0666),
+	ATTR(NULL, "sockcreate",	0666),
+#ifdef CONFIG_SECURITY_SMACK
+	DIR("smack",			0555,
+	    proc_smack_attr_dir_inode_ops, proc_smack_attr_dir_ops),
+#endif
 };
 
 static int proc_attr_dir_readdir(struct file *file, struct dir_context *ctx)
@@ -2613,7 +2656,8 @@ static struct dentry *proc_attr_dir_lookup(struct inode *dir,
 				struct dentry *dentry, unsigned int flags)
 {
 	return proc_pident_lookup(dir, dentry,
-				  attr_dir_stuff, ARRAY_SIZE(attr_dir_stuff));
+				  attr_dir_stuff,
+				  attr_dir_stuff + ARRAY_SIZE(attr_dir_stuff));
 }
 
 static const struct inode_operations proc_attr_dir_inode_operations = {
@@ -3002,7 +3046,7 @@ static const struct pid_entry tgid_base_stuff[] = {
 	ONE("oom_score",  S_IRUGO, proc_oom_score),
 	REG("oom_adj",    S_IRUGO|S_IWUSR, proc_oom_adj_operations),
 	REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
-#ifdef CONFIG_AUDITSYSCALL
+#ifdef CONFIG_AUDIT
 	REG("loginuid",   S_IWUSR|S_IRUGO, proc_loginuid_operations),
 	REG("sessionid",  S_IRUGO, proc_sessionid_operations),
 #endif
@@ -3032,6 +3076,9 @@ static const struct pid_entry tgid_base_stuff[] = {
 #ifdef CONFIG_STACKLEAK_METRICS
 	ONE("stack_depth", S_IRUGO, proc_stack_depth),
 #endif
+#ifdef CONFIG_PROC_PID_ARCH_STATUS
+	ONE("arch_status", S_IRUGO, proc_pid_arch_status),
+#endif
 };
 
 static int proc_tgid_base_readdir(struct file *file, struct dir_context *ctx)
@@ -3046,10 +3093,19 @@ static const struct file_operations proc_tgid_base_operations = {
 	.llseek		= generic_file_llseek,
 };
 
+struct pid *tgid_pidfd_to_pid(const struct file *file)
+{
+	if (file->f_op != &proc_tgid_base_operations)
+		return ERR_PTR(-EBADF);
+
+	return proc_pid(file_inode(file));
+}
+
 static struct dentry *proc_tgid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
 	return proc_pident_lookup(dir, dentry,
-				  tgid_base_stuff, ARRAY_SIZE(tgid_base_stuff));
+				  tgid_base_stuff,
+				  tgid_base_stuff + ARRAY_SIZE(tgid_base_stuff));
 }
 
 static const struct inode_operations proc_tgid_base_inode_operations = {
@@ -3165,7 +3221,7 @@ static struct dentry *proc_pid_instantiate(struct dentry * dentry,
 	return d_splice_alias(inode, dentry);
 }
 
-struct dentry *proc_pid_lookup(struct inode *dir, struct dentry * dentry, unsigned int flags)
+struct dentry *proc_pid_lookup(struct dentry *dentry, unsigned int flags)
 {
 	struct task_struct *task;
 	unsigned tgid;
@@ -3390,7 +3446,7 @@ static const struct pid_entry tid_base_stuff[] = {
 	ONE("oom_score", S_IRUGO, proc_oom_score),
 	REG("oom_adj",   S_IRUGO|S_IWUSR, proc_oom_adj_operations),
 	REG("oom_score_adj", S_IRUGO|S_IWUSR, proc_oom_score_adj_operations),
-#ifdef CONFIG_AUDITSYSCALL
+#ifdef CONFIG_AUDIT
 	REG("loginuid",  S_IWUSR|S_IRUGO, proc_loginuid_operations),
 	REG("sessionid",  S_IRUGO, proc_sessionid_operations),
 #endif
@@ -3410,6 +3466,9 @@ static const struct pid_entry tid_base_stuff[] = {
 #ifdef CONFIG_LIVEPATCH
 	ONE("patch_state",  S_IRUSR, proc_pid_patch_state),
 #endif
+#ifdef CONFIG_PROC_PID_ARCH_STATUS
+	ONE("arch_status", S_IRUGO, proc_pid_arch_status),
+#endif
 };
 
 static int proc_tid_base_readdir(struct file *file, struct dir_context *ctx)
@@ -3421,7 +3480,8 @@ static int proc_tid_base_readdir(struct file *file, struct dir_context *ctx)
 static struct dentry *proc_tid_base_lookup(struct inode *dir, struct dentry *dentry, unsigned int flags)
 {
 	return proc_pident_lookup(dir, dentry,
-				  tid_base_stuff, ARRAY_SIZE(tid_base_stuff));
+				  tid_base_stuff,
+				  tid_base_stuff + ARRAY_SIZE(tid_base_stuff));
 }
 
 static const struct file_operations proc_tid_base_operations = {
diff --git a/fs/proc/consoles.c b/fs/proc/consoles.c
index 954caf0b7fee..dfe6ce3505ce 100644
--- a/fs/proc/consoles.c
+++ b/fs/proc/consoles.c
@@ -1,7 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2010 Werner Fink, Jiri Slaby
- *
- * Licensed under GPLv2
  */
 
 #include <linux/console.h>
diff --git a/fs/proc/generic.c b/fs/proc/generic.c
index e39bac94dead..64e9ee1b129e 100644
--- a/fs/proc/generic.c
+++ b/fs/proc/generic.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * proc/fs/generic.c --- generic routines for the proc-fs
  *
diff --git a/fs/proc/inode.c b/fs/proc/inode.c
index da649ccd6804..5f8d215b3fd0 100644
--- a/fs/proc/inode.c
+++ b/fs/proc/inode.c
@@ -24,7 +24,6 @@
 #include <linux/seq_file.h>
 #include <linux/slab.h>
 #include <linux/mount.h>
-#include <linux/magic.h>
 
 #include <linux/uaccess.h>
 
@@ -73,17 +72,11 @@ static struct inode *proc_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void proc_i_callback(struct rcu_head *head)
+static void proc_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(proc_inode_cachep, PROC_I(inode));
 }
 
-static void proc_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, proc_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct proc_inode *ei = (struct proc_inode *) foo;
@@ -122,13 +115,12 @@ static int proc_show_options(struct seq_file *seq, struct dentry *root)
 	return 0;
 }
 
-static const struct super_operations proc_sops = {
+const struct super_operations proc_sops = {
 	.alloc_inode	= proc_alloc_inode,
-	.destroy_inode	= proc_destroy_inode,
+	.free_inode	= proc_free_inode,
 	.drop_inode	= generic_delete_inode,
 	.evict_inode	= proc_evict_inode,
 	.statfs		= simple_statfs,
-	.remount_fs	= proc_remount,
 	.show_options	= proc_show_options,
 };
 
@@ -488,51 +480,3 @@ struct inode *proc_get_inode(struct super_block *sb, struct proc_dir_entry *de)
 	       pde_put(de);
 	return inode;
 }
-
-int proc_fill_super(struct super_block *s, void *data, int silent)
-{
-	struct pid_namespace *ns = get_pid_ns(s->s_fs_info);
-	struct inode *root_inode;
-	int ret;
-
-	if (!proc_parse_options(data, ns))
-		return -EINVAL;
-
-	/* User space would break if executables or devices appear on proc */
-	s->s_iflags |= SB_I_USERNS_VISIBLE | SB_I_NOEXEC | SB_I_NODEV;
-	s->s_flags |= SB_NODIRATIME | SB_NOSUID | SB_NOEXEC;
-	s->s_blocksize = 1024;
-	s->s_blocksize_bits = 10;
-	s->s_magic = PROC_SUPER_MAGIC;
-	s->s_op = &proc_sops;
-	s->s_time_gran = 1;
-
-	/*
-	 * procfs isn't actually a stacking filesystem; however, there is
-	 * too much magic going on inside it to permit stacking things on
-	 * top of it
-	 */
-	s->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH;
-	
-	/* procfs dentries and inodes don't require IO to create */
-	s->s_shrink.seeks = 0;
-
-	pde_get(&proc_root);
-	root_inode = proc_get_inode(s, &proc_root);
-	if (!root_inode) {
-		pr_err("proc_fill_super: get root inode failed\n");
-		return -ENOMEM;
-	}
-
-	s->s_root = d_make_root(root_inode);
-	if (!s->s_root) {
-		pr_err("proc_fill_super: allocate dentry failed\n");
-		return -ENOMEM;
-	}
-
-	ret = proc_setup_self(s);
-	if (ret) {
-		return ret;
-	}
-	return proc_setup_thread_self(s);
-}
diff --git a/fs/proc/internal.h b/fs/proc/internal.h
index 95b14196f284..cd0c8d5ce9a1 100644
--- a/fs/proc/internal.h
+++ b/fs/proc/internal.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* Internal procfs definitions
  *
  * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/proc_fs.h>
@@ -82,6 +78,7 @@ union proc_op {
 	int (*proc_show)(struct seq_file *m,
 		struct pid_namespace *ns, struct pid *pid,
 		struct task_struct *task);
+	const char *lsm;
 };
 
 struct proc_inode {
@@ -162,7 +159,7 @@ extern struct inode *proc_pid_make_inode(struct super_block *, struct task_struc
 extern void pid_update_inode(struct task_struct *, struct inode *);
 extern int pid_delete_dentry(const struct dentry *);
 extern int proc_pid_readdir(struct file *, struct dir_context *);
-extern struct dentry *proc_pid_lookup(struct inode *, struct dentry *, unsigned int);
+struct dentry *proc_pid_lookup(struct dentry *, unsigned int);
 extern loff_t mem_lseek(struct file *, loff_t, int);
 
 /* Lookups */
@@ -206,13 +203,12 @@ struct pde_opener {
 	struct completion *c;
 } __randomize_layout;
 extern const struct inode_operations proc_link_inode_operations;
-
 extern const struct inode_operations proc_pid_link_inode_operations;
+extern const struct super_operations proc_sops;
 
 void proc_init_kmemcache(void);
 void set_proc_pid_nlink(void);
 extern struct inode *proc_get_inode(struct super_block *, struct proc_dir_entry *);
-extern int proc_fill_super(struct super_block *, void *data, int flags);
 extern void proc_entry_rundown(struct proc_dir_entry *);
 
 /*
@@ -270,10 +266,8 @@ static inline void proc_tty_init(void) {}
  * root.c
  */
 extern struct proc_dir_entry proc_root;
-extern int proc_parse_options(char *options, struct pid_namespace *pid);
 
 extern void proc_self_init(void);
-extern int proc_remount(struct super_block *, int *, char *);
 
 /*
  * task_[no]mmu.c
diff --git a/fs/proc/kcore.c b/fs/proc/kcore.c
index bbcc185062bb..f5834488b67d 100644
--- a/fs/proc/kcore.c
+++ b/fs/proc/kcore.c
@@ -54,6 +54,28 @@ static LIST_HEAD(kclist_head);
 static DECLARE_RWSEM(kclist_lock);
 static int kcore_need_update = 1;
 
+/*
+ * Returns > 0 for RAM pages, 0 for non-RAM pages, < 0 on error
+ * Same as oldmem_pfn_is_ram in vmcore
+ */
+static int (*mem_pfn_is_ram)(unsigned long pfn);
+
+int __init register_mem_pfn_is_ram(int (*fn)(unsigned long pfn))
+{
+	if (mem_pfn_is_ram)
+		return -EBUSY;
+	mem_pfn_is_ram = fn;
+	return 0;
+}
+
+static int pfn_is_ram(unsigned long pfn)
+{
+	if (mem_pfn_is_ram)
+		return mem_pfn_is_ram(pfn);
+	else
+		return 1;
+}
+
 /* This doesn't grab kclist_lock, so it should only be used at init time. */
 void __init kclist_add(struct kcore_list *new, void *addr, size_t size,
 		       int type)
@@ -465,6 +487,11 @@ read_kcore(struct file *file, char __user *buffer, size_t buflen, loff_t *fpos)
 				goto out;
 			}
 			m = NULL;	/* skip the list anchor */
+		} else if (!pfn_is_ram(__pa(start) >> PAGE_SHIFT)) {
+			if (clear_user(buffer, tsz)) {
+				ret = -EFAULT;
+				goto out;
+			}
 		} else if (m->type == KCORE_VMALLOC) {
 			vread(buf, (char *)start, tsz);
 			/* we have to zero-fill user buffer even if no read */
@@ -588,7 +615,7 @@ static void __init proc_kcore_text_init(void)
 /*
  * MODULES_VADDR has no intersection with VMALLOC_ADDR.
  */
-struct kcore_list kcore_modules;
+static struct kcore_list kcore_modules;
 static void __init add_modules_range(void)
 {
 	if (MODULES_VADDR != VMALLOC_START && MODULES_END != VMALLOC_END) {
diff --git a/fs/proc/meminfo.c b/fs/proc/meminfo.c
index 568d90e17c17..465ea0153b2a 100644
--- a/fs/proc/meminfo.c
+++ b/fs/proc/meminfo.c
@@ -120,7 +120,7 @@ static int meminfo_proc_show(struct seq_file *m, void *v)
 	show_val_kb(m, "Committed_AS:   ", committed);
 	seq_printf(m, "VmallocTotal:   %8lu kB\n",
 		   (unsigned long)VMALLOC_TOTAL >> 10);
-	show_val_kb(m, "VmallocUsed:    ", 0ul);
+	show_val_kb(m, "VmallocUsed:    ", vmalloc_nr_pages());
 	show_val_kb(m, "VmallocChunk:   ", 0ul);
 	show_val_kb(m, "Percpu:         ", pcpu_nr_pages());
 
diff --git a/fs/proc/nommu.c b/fs/proc/nommu.c
index 3b63be64e436..14c2badb8fd9 100644
--- a/fs/proc/nommu.c
+++ b/fs/proc/nommu.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* nommu.c: mmu-less memory info files
  *
  * Copyright (C) 2004 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/init.h>
diff --git a/fs/proc/page.c b/fs/proc/page.c
index 40b05e0d4274..544d1ee15aee 100644
--- a/fs/proc/page.c
+++ b/fs/proc/page.c
@@ -152,8 +152,8 @@ u64 stable_page_flags(struct page *page)
 	else if (page_count(page) == 0 && is_free_buddy_page(page))
 		u |= 1 << KPF_BUDDY;
 
-	if (PageBalloon(page))
-		u |= 1 << KPF_BALLOON;
+	if (PageOffline(page))
+		u |= 1 << KPF_OFFLINE;
 	if (PageTable(page))
 		u |= 1 << KPF_PGTABLE;
 
diff --git a/fs/proc/proc_net.c b/fs/proc/proc_net.c
index a7b12435519e..76ae278df1c4 100644
--- a/fs/proc/proc_net.c
+++ b/fs/proc/proc_net.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/proc/net.c
  *
diff --git a/fs/proc/proc_sysctl.c b/fs/proc/proc_sysctl.c
index 4d598a399bbf..c74570736b24 100644
--- a/fs/proc/proc_sysctl.c
+++ b/fs/proc/proc_sysctl.c
@@ -13,6 +13,7 @@
 #include <linux/namei.h>
 #include <linux/mm.h>
 #include <linux/module.h>
+#include <linux/bpf-cgroup.h>
 #include "internal.h"
 
 static const struct dentry_operations proc_sys_dentry_operations;
@@ -569,8 +570,8 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
 	struct inode *inode = file_inode(filp);
 	struct ctl_table_header *head = grab_header(inode);
 	struct ctl_table *table = PROC_I(inode)->sysctl_entry;
+	void *new_buf = NULL;
 	ssize_t error;
-	size_t res;
 
 	if (IS_ERR(head))
 		return PTR_ERR(head);
@@ -588,11 +589,27 @@ static ssize_t proc_sys_call_handler(struct file *filp, void __user *buf,
 	if (!table->proc_handler)
 		goto out;
 
+	error = BPF_CGROUP_RUN_PROG_SYSCTL(head, table, write, buf, &count,
+					   ppos, &new_buf);
+	if (error)
+		goto out;
+
 	/* careful: calling conventions are nasty here */
-	res = count;
-	error = table->proc_handler(table, write, buf, &res, ppos);
+	if (new_buf) {
+		mm_segment_t old_fs;
+
+		old_fs = get_fs();
+		set_fs(KERNEL_DS);
+		error = table->proc_handler(table, write, (void __user *)new_buf,
+					    &count, ppos);
+		set_fs(old_fs);
+		kfree(new_buf);
+	} else {
+		error = table->proc_handler(table, write, buf, &count, ppos);
+	}
+
 	if (!error)
-		error = res;
+		error = count;
 out:
 	sysctl_head_finish(head);
 
@@ -1626,8 +1643,11 @@ static void drop_sysctl_table(struct ctl_table_header *header)
 	if (--header->nreg)
 		return;
 
-	put_links(header);
-	start_unregistering(header);
+	if (parent) {
+		put_links(header);
+		start_unregistering(header);
+	}
+
 	if (!--header->count)
 		kfree_rcu(header, rcu);
 
diff --git a/fs/proc/root.c b/fs/proc/root.c
index f4b1a9d2eca6..522199e9525e 100644
--- a/fs/proc/root.c
+++ b/fs/proc/root.c
@@ -19,86 +19,178 @@
 #include <linux/module.h>
 #include <linux/bitops.h>
 #include <linux/user_namespace.h>
+#include <linux/fs_context.h>
 #include <linux/mount.h>
 #include <linux/pid_namespace.h>
-#include <linux/parser.h>
+#include <linux/fs_parser.h>
 #include <linux/cred.h>
+#include <linux/magic.h>
+#include <linux/slab.h>
 
 #include "internal.h"
 
-enum {
-	Opt_gid, Opt_hidepid, Opt_err,
+struct proc_fs_context {
+	struct pid_namespace	*pid_ns;
+	unsigned int		mask;
+	int			hidepid;
+	int			gid;
 };
 
-static const match_table_t tokens = {
-	{Opt_hidepid, "hidepid=%u"},
-	{Opt_gid, "gid=%u"},
-	{Opt_err, NULL},
+enum proc_param {
+	Opt_gid,
+	Opt_hidepid,
 };
 
-int proc_parse_options(char *options, struct pid_namespace *pid)
+static const struct fs_parameter_spec proc_param_specs[] = {
+	fsparam_u32("gid",	Opt_gid),
+	fsparam_u32("hidepid",	Opt_hidepid),
+	{}
+};
+
+static const struct fs_parameter_description proc_fs_parameters = {
+	.name		= "proc",
+	.specs		= proc_param_specs,
+};
+
+static int proc_parse_param(struct fs_context *fc, struct fs_parameter *param)
 {
-	char *p;
-	substring_t args[MAX_OPT_ARGS];
-	int option;
-
-	if (!options)
-		return 1;
-
-	while ((p = strsep(&options, ",")) != NULL) {
-		int token;
-		if (!*p)
-			continue;
-
-		args[0].to = args[0].from = NULL;
-		token = match_token(p, tokens, args);
-		switch (token) {
-		case Opt_gid:
-			if (match_int(&args[0], &option))
-				return 0;
-			pid->pid_gid = make_kgid(current_user_ns(), option);
-			break;
-		case Opt_hidepid:
-			if (match_int(&args[0], &option))
-				return 0;
-			if (option < HIDEPID_OFF ||
-			    option > HIDEPID_INVISIBLE) {
-				pr_err("proc: hidepid value must be between 0 and 2.\n");
-				return 0;
-			}
-			pid->hide_pid = option;
-			break;
-		default:
-			pr_err("proc: unrecognized mount option \"%s\" "
-			       "or missing value\n", p);
-			return 0;
-		}
+	struct proc_fs_context *ctx = fc->fs_private;
+	struct fs_parse_result result;
+	int opt;
+
+	opt = fs_parse(fc, &proc_fs_parameters, param, &result);
+	if (opt < 0)
+		return opt;
+
+	switch (opt) {
+	case Opt_gid:
+		ctx->gid = result.uint_32;
+		break;
+
+	case Opt_hidepid:
+		ctx->hidepid = result.uint_32;
+		if (ctx->hidepid < HIDEPID_OFF ||
+		    ctx->hidepid > HIDEPID_INVISIBLE)
+			return invalf(fc, "proc: hidepid value must be between 0 and 2.\n");
+		break;
+
+	default:
+		return -EINVAL;
 	}
 
-	return 1;
+	ctx->mask |= 1 << opt;
+	return 0;
 }
 
-int proc_remount(struct super_block *sb, int *flags, char *data)
+static void proc_apply_options(struct super_block *s,
+			       struct fs_context *fc,
+			       struct pid_namespace *pid_ns,
+			       struct user_namespace *user_ns)
 {
+	struct proc_fs_context *ctx = fc->fs_private;
+
+	if (ctx->mask & (1 << Opt_gid))
+		pid_ns->pid_gid = make_kgid(user_ns, ctx->gid);
+	if (ctx->mask & (1 << Opt_hidepid))
+		pid_ns->hide_pid = ctx->hidepid;
+}
+
+static int proc_fill_super(struct super_block *s, struct fs_context *fc)
+{
+	struct pid_namespace *pid_ns = get_pid_ns(s->s_fs_info);
+	struct inode *root_inode;
+	int ret;
+
+	proc_apply_options(s, fc, pid_ns, current_user_ns());
+
+	/* User space would break if executables or devices appear on proc */
+	s->s_iflags |= SB_I_USERNS_VISIBLE | SB_I_NOEXEC | SB_I_NODEV;
+	s->s_flags |= SB_NODIRATIME | SB_NOSUID | SB_NOEXEC;
+	s->s_blocksize = 1024;
+	s->s_blocksize_bits = 10;
+	s->s_magic = PROC_SUPER_MAGIC;
+	s->s_op = &proc_sops;
+	s->s_time_gran = 1;
+
+	/*
+	 * procfs isn't actually a stacking filesystem; however, there is
+	 * too much magic going on inside it to permit stacking things on
+	 * top of it
+	 */
+	s->s_stack_depth = FILESYSTEM_MAX_STACK_DEPTH;
+	
+	/* procfs dentries and inodes don't require IO to create */
+	s->s_shrink.seeks = 0;
+
+	pde_get(&proc_root);
+	root_inode = proc_get_inode(s, &proc_root);
+	if (!root_inode) {
+		pr_err("proc_fill_super: get root inode failed\n");
+		return -ENOMEM;
+	}
+
+	s->s_root = d_make_root(root_inode);
+	if (!s->s_root) {
+		pr_err("proc_fill_super: allocate dentry failed\n");
+		return -ENOMEM;
+	}
+
+	ret = proc_setup_self(s);
+	if (ret) {
+		return ret;
+	}
+	return proc_setup_thread_self(s);
+}
+
+static int proc_reconfigure(struct fs_context *fc)
+{
+	struct super_block *sb = fc->root->d_sb;
 	struct pid_namespace *pid = sb->s_fs_info;
 
 	sync_filesystem(sb);
-	return !proc_parse_options(data, pid);
+
+	proc_apply_options(sb, fc, pid, current_user_ns());
+	return 0;
 }
 
-static struct dentry *proc_mount(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data)
+static int proc_get_tree(struct fs_context *fc)
 {
-	struct pid_namespace *ns;
+	struct proc_fs_context *ctx = fc->fs_private;
 
-	if (flags & SB_KERNMOUNT) {
-		ns = data;
-		data = NULL;
-	} else {
-		ns = task_active_pid_ns(current);
-	}
+	put_user_ns(fc->user_ns);
+	fc->user_ns = get_user_ns(ctx->pid_ns->user_ns);
+	fc->s_fs_info = ctx->pid_ns;
+	return vfs_get_super(fc, vfs_get_keyed_super, proc_fill_super);
+}
 
-	return mount_ns(fs_type, flags, data, ns, ns->user_ns, proc_fill_super);
+static void proc_fs_context_free(struct fs_context *fc)
+{
+	struct proc_fs_context *ctx = fc->fs_private;
+
+	if (ctx->pid_ns)
+		put_pid_ns(ctx->pid_ns);
+	kfree(ctx);
+}
+
+static const struct fs_context_operations proc_fs_context_ops = {
+	.free		= proc_fs_context_free,
+	.parse_param	= proc_parse_param,
+	.get_tree	= proc_get_tree,
+	.reconfigure	= proc_reconfigure,
+};
+
+static int proc_init_fs_context(struct fs_context *fc)
+{
+	struct proc_fs_context *ctx;
+
+	ctx = kzalloc(sizeof(struct proc_fs_context), GFP_KERNEL);
+	if (!ctx)
+		return -ENOMEM;
+
+	ctx->pid_ns = get_pid_ns(task_active_pid_ns(current));
+	fc->fs_private = ctx;
+	fc->ops = &proc_fs_context_ops;
+	return 0;
 }
 
 static void proc_kill_sb(struct super_block *sb)
@@ -115,10 +207,11 @@ static void proc_kill_sb(struct super_block *sb)
 }
 
 static struct file_system_type proc_fs_type = {
-	.name		= "proc",
-	.mount		= proc_mount,
-	.kill_sb	= proc_kill_sb,
-	.fs_flags	= FS_USERNS_MOUNT,
+	.name			= "proc",
+	.init_fs_context	= proc_init_fs_context,
+	.parameters		= &proc_fs_parameters,
+	.kill_sb		= proc_kill_sb,
+	.fs_flags		= FS_USERNS_MOUNT | FS_DISALLOW_NOTIFY_PERM,
 };
 
 void __init proc_root_init(void)
@@ -154,9 +247,9 @@ static int proc_root_getattr(const struct path *path, struct kstat *stat,
 
 static struct dentry *proc_root_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
 {
-	if (!proc_pid_lookup(dir, dentry, flags))
+	if (!proc_pid_lookup(dentry, flags))
 		return NULL;
-	
+
 	return proc_lookup(dir, dentry, flags);
 }
 
@@ -209,9 +302,28 @@ struct proc_dir_entry proc_root = {
 
 int pid_ns_prepare_proc(struct pid_namespace *ns)
 {
+	struct proc_fs_context *ctx;
+	struct fs_context *fc;
 	struct vfsmount *mnt;
 
-	mnt = kern_mount_data(&proc_fs_type, ns);
+	fc = fs_context_for_mount(&proc_fs_type, SB_KERNMOUNT);
+	if (IS_ERR(fc))
+		return PTR_ERR(fc);
+
+	if (fc->user_ns != ns->user_ns) {
+		put_user_ns(fc->user_ns);
+		fc->user_ns = get_user_ns(ns->user_ns);
+	}
+
+	ctx = fc->fs_private;
+	if (ctx->pid_ns != ns) {
+		put_pid_ns(ctx->pid_ns);
+		get_pid_ns(ns);
+		ctx->pid_ns = ns;
+	}
+
+	mnt = fc_mount(fc);
+	put_fs_context(fc);
 	if (IS_ERR(mnt))
 		return PTR_ERR(mnt);
 
diff --git a/fs/proc/self.c b/fs/proc/self.c
index 127265e5c55f..57c0a1047250 100644
--- a/fs/proc/self.c
+++ b/fs/proc/self.c
@@ -38,6 +38,7 @@ int proc_setup_self(struct super_block *s)
 	struct inode *root_inode = d_inode(s->s_root);
 	struct pid_namespace *ns = proc_pid_ns(root_inode);
 	struct dentry *self;
+	int ret = -ENOMEM;
 	
 	inode_lock(root_inode);
 	self = d_alloc_name(s->s_root, "self");
@@ -51,20 +52,19 @@ int proc_setup_self(struct super_block *s)
 			inode->i_gid = GLOBAL_ROOT_GID;
 			inode->i_op = &proc_self_inode_operations;
 			d_add(self, inode);
+			ret = 0;
 		} else {
 			dput(self);
-			self = ERR_PTR(-ENOMEM);
 		}
-	} else {
-		self = ERR_PTR(-ENOMEM);
 	}
 	inode_unlock(root_inode);
-	if (IS_ERR(self)) {
+
+	if (ret)
 		pr_err("proc_fill_super: can't allocate /proc/self\n");
-		return PTR_ERR(self);
-	}
-	ns->proc_self = self;
-	return 0;
+	else
+		ns->proc_self = self;
+
+	return ret;
 }
 
 void __init proc_self_init(void)
diff --git a/fs/proc/stat.c b/fs/proc/stat.c
index 535eda7857cf..80c305f206bb 100644
--- a/fs/proc/stat.c
+++ b/fs/proc/stat.c
@@ -23,21 +23,21 @@
 
 #ifdef arch_idle_time
 
-static u64 get_idle_time(int cpu)
+static u64 get_idle_time(struct kernel_cpustat *kcs, int cpu)
 {
 	u64 idle;
 
-	idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
+	idle = kcs->cpustat[CPUTIME_IDLE];
 	if (cpu_online(cpu) && !nr_iowait_cpu(cpu))
 		idle += arch_idle_time(cpu);
 	return idle;
 }
 
-static u64 get_iowait_time(int cpu)
+static u64 get_iowait_time(struct kernel_cpustat *kcs, int cpu)
 {
 	u64 iowait;
 
-	iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
+	iowait = kcs->cpustat[CPUTIME_IOWAIT];
 	if (cpu_online(cpu) && nr_iowait_cpu(cpu))
 		iowait += arch_idle_time(cpu);
 	return iowait;
@@ -45,7 +45,7 @@ static u64 get_iowait_time(int cpu)
 
 #else
 
-static u64 get_idle_time(int cpu)
+static u64 get_idle_time(struct kernel_cpustat *kcs, int cpu)
 {
 	u64 idle, idle_usecs = -1ULL;
 
@@ -54,14 +54,14 @@ static u64 get_idle_time(int cpu)
 
 	if (idle_usecs == -1ULL)
 		/* !NO_HZ or cpu offline so we can rely on cpustat.idle */
-		idle = kcpustat_cpu(cpu).cpustat[CPUTIME_IDLE];
+		idle = kcs->cpustat[CPUTIME_IDLE];
 	else
 		idle = idle_usecs * NSEC_PER_USEC;
 
 	return idle;
 }
 
-static u64 get_iowait_time(int cpu)
+static u64 get_iowait_time(struct kernel_cpustat *kcs, int cpu)
 {
 	u64 iowait, iowait_usecs = -1ULL;
 
@@ -70,7 +70,7 @@ static u64 get_iowait_time(int cpu)
 
 	if (iowait_usecs == -1ULL)
 		/* !NO_HZ or cpu offline so we can rely on cpustat.iowait */
-		iowait = kcpustat_cpu(cpu).cpustat[CPUTIME_IOWAIT];
+		iowait = kcs->cpustat[CPUTIME_IOWAIT];
 	else
 		iowait = iowait_usecs * NSEC_PER_USEC;
 
@@ -79,6 +79,31 @@ static u64 get_iowait_time(int cpu)
 
 #endif
 
+static void show_irq_gap(struct seq_file *p, unsigned int gap)
+{
+	static const char zeros[] = " 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0";
+
+	while (gap > 0) {
+		unsigned int inc;
+
+		inc = min_t(unsigned int, gap, ARRAY_SIZE(zeros) / 2);
+		seq_write(p, zeros, 2 * inc);
+		gap -= inc;
+	}
+}
+
+static void show_all_irqs(struct seq_file *p)
+{
+	unsigned int i, next = 0;
+
+	for_each_active_irq(i) {
+		show_irq_gap(p, i - next);
+		seq_put_decimal_ull(p, " ", kstat_irqs_usr(i));
+		next = i + 1;
+	}
+	show_irq_gap(p, nr_irqs - next);
+}
+
 static int show_stat(struct seq_file *p, void *v)
 {
 	int i, j;
@@ -95,16 +120,18 @@ static int show_stat(struct seq_file *p, void *v)
 	getboottime64(&boottime);
 
 	for_each_possible_cpu(i) {
-		user += kcpustat_cpu(i).cpustat[CPUTIME_USER];
-		nice += kcpustat_cpu(i).cpustat[CPUTIME_NICE];
-		system += kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM];
-		idle += get_idle_time(i);
-		iowait += get_iowait_time(i);
-		irq += kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
-		softirq += kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ];
-		steal += kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
-		guest += kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
-		guest_nice += kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
+		struct kernel_cpustat *kcs = &kcpustat_cpu(i);
+
+		user += kcs->cpustat[CPUTIME_USER];
+		nice += kcs->cpustat[CPUTIME_NICE];
+		system += kcs->cpustat[CPUTIME_SYSTEM];
+		idle += get_idle_time(kcs, i);
+		iowait += get_iowait_time(kcs, i);
+		irq += kcs->cpustat[CPUTIME_IRQ];
+		softirq += kcs->cpustat[CPUTIME_SOFTIRQ];
+		steal += kcs->cpustat[CPUTIME_STEAL];
+		guest += kcs->cpustat[CPUTIME_GUEST];
+		guest_nice += kcs->cpustat[CPUTIME_GUEST_NICE];
 		sum += kstat_cpu_irqs_sum(i);
 		sum += arch_irq_stat_cpu(i);
 
@@ -130,17 +157,19 @@ static int show_stat(struct seq_file *p, void *v)
 	seq_putc(p, '\n');
 
 	for_each_online_cpu(i) {
+		struct kernel_cpustat *kcs = &kcpustat_cpu(i);
+
 		/* Copy values here to work around gcc-2.95.3, gcc-2.96 */
-		user = kcpustat_cpu(i).cpustat[CPUTIME_USER];
-		nice = kcpustat_cpu(i).cpustat[CPUTIME_NICE];
-		system = kcpustat_cpu(i).cpustat[CPUTIME_SYSTEM];
-		idle = get_idle_time(i);
-		iowait = get_iowait_time(i);
-		irq = kcpustat_cpu(i).cpustat[CPUTIME_IRQ];
-		softirq = kcpustat_cpu(i).cpustat[CPUTIME_SOFTIRQ];
-		steal = kcpustat_cpu(i).cpustat[CPUTIME_STEAL];
-		guest = kcpustat_cpu(i).cpustat[CPUTIME_GUEST];
-		guest_nice = kcpustat_cpu(i).cpustat[CPUTIME_GUEST_NICE];
+		user = kcs->cpustat[CPUTIME_USER];
+		nice = kcs->cpustat[CPUTIME_NICE];
+		system = kcs->cpustat[CPUTIME_SYSTEM];
+		idle = get_idle_time(kcs, i);
+		iowait = get_iowait_time(kcs, i);
+		irq = kcs->cpustat[CPUTIME_IRQ];
+		softirq = kcs->cpustat[CPUTIME_SOFTIRQ];
+		steal = kcs->cpustat[CPUTIME_STEAL];
+		guest = kcs->cpustat[CPUTIME_GUEST];
+		guest_nice = kcs->cpustat[CPUTIME_GUEST_NICE];
 		seq_printf(p, "cpu%d", i);
 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(user));
 		seq_put_decimal_ull(p, " ", nsec_to_clock_t(nice));
@@ -156,9 +185,7 @@ static int show_stat(struct seq_file *p, void *v)
 	}
 	seq_put_decimal_ull(p, "intr ", (unsigned long long)sum);
 
-	/* sum again ? it could be updated? */
-	for_each_irq_nr(j)
-		seq_put_decimal_ull(p, " ", kstat_irqs_usr(j));
+	show_all_irqs(p);
 
 	seq_printf(p,
 		"\nctxt %llu\n"
diff --git a/fs/proc/task_mmu.c b/fs/proc/task_mmu.c
index 85b0ef890b28..dedca3da428a 100644
--- a/fs/proc/task_mmu.c
+++ b/fs/proc/task_mmu.c
@@ -59,7 +59,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
 	SEQ_PUT_DEC("VmPeak:\t", hiwater_vm);
 	SEQ_PUT_DEC(" kB\nVmSize:\t", total_vm);
 	SEQ_PUT_DEC(" kB\nVmLck:\t", mm->locked_vm);
-	SEQ_PUT_DEC(" kB\nVmPin:\t", mm->pinned_vm);
+	SEQ_PUT_DEC(" kB\nVmPin:\t", atomic64_read(&mm->pinned_vm));
 	SEQ_PUT_DEC(" kB\nVmHWM:\t", hiwater_rss);
 	SEQ_PUT_DEC(" kB\nVmRSS:\t", total_rss);
 	SEQ_PUT_DEC(" kB\nRssAnon:\t", anon);
@@ -166,7 +166,11 @@ static void *m_start(struct seq_file *m, loff_t *ppos)
 	if (!mm || !mmget_not_zero(mm))
 		return NULL;
 
-	down_read(&mm->mmap_sem);
+	if (down_read_killable(&mm->mmap_sem)) {
+		mmput(mm);
+		return ERR_PTR(-EINTR);
+	}
+
 	hold_task_mempolicy(priv);
 	priv->tail_vma = get_gate_vma(mm);
 
@@ -417,17 +421,53 @@ struct mem_size_stats {
 	unsigned long shared_hugetlb;
 	unsigned long private_hugetlb;
 	u64 pss;
+	u64 pss_anon;
+	u64 pss_file;
+	u64 pss_shmem;
 	u64 pss_locked;
 	u64 swap_pss;
 	bool check_shmem_swap;
 };
 
+static void smaps_page_accumulate(struct mem_size_stats *mss,
+		struct page *page, unsigned long size, unsigned long pss,
+		bool dirty, bool locked, bool private)
+{
+	mss->pss += pss;
+
+	if (PageAnon(page))
+		mss->pss_anon += pss;
+	else if (PageSwapBacked(page))
+		mss->pss_shmem += pss;
+	else
+		mss->pss_file += pss;
+
+	if (locked)
+		mss->pss_locked += pss;
+
+	if (dirty || PageDirty(page)) {
+		if (private)
+			mss->private_dirty += size;
+		else
+			mss->shared_dirty += size;
+	} else {
+		if (private)
+			mss->private_clean += size;
+		else
+			mss->shared_clean += size;
+	}
+}
+
 static void smaps_account(struct mem_size_stats *mss, struct page *page,
 		bool compound, bool young, bool dirty, bool locked)
 {
 	int i, nr = compound ? 1 << compound_order(page) : 1;
 	unsigned long size = nr * PAGE_SIZE;
 
+	/*
+	 * First accumulate quantities that depend only on |size| and the type
+	 * of the compound page.
+	 */
 	if (PageAnon(page)) {
 		mss->anonymous += size;
 		if (!PageSwapBacked(page) && !dirty && !PageDirty(page))
@@ -440,42 +480,25 @@ static void smaps_account(struct mem_size_stats *mss, struct page *page,
 		mss->referenced += size;
 
 	/*
+	 * Then accumulate quantities that may depend on sharing, or that may
+	 * differ page-by-page.
+	 *
 	 * page_count(page) == 1 guarantees the page is mapped exactly once.
 	 * If any subpage of the compound page mapped with PTE it would elevate
 	 * page_count().
 	 */
 	if (page_count(page) == 1) {
-		if (dirty || PageDirty(page))
-			mss->private_dirty += size;
-		else
-			mss->private_clean += size;
-		mss->pss += (u64)size << PSS_SHIFT;
-		if (locked)
-			mss->pss_locked += (u64)size << PSS_SHIFT;
+		smaps_page_accumulate(mss, page, size, size << PSS_SHIFT, dirty,
+			locked, true);
 		return;
 	}
-
 	for (i = 0; i < nr; i++, page++) {
 		int mapcount = page_mapcount(page);
-		unsigned long pss = (PAGE_SIZE << PSS_SHIFT);
-
-		if (mapcount >= 2) {
-			if (dirty || PageDirty(page))
-				mss->shared_dirty += PAGE_SIZE;
-			else
-				mss->shared_clean += PAGE_SIZE;
-			mss->pss += pss / mapcount;
-			if (locked)
-				mss->pss_locked += pss / mapcount;
-		} else {
-			if (dirty || PageDirty(page))
-				mss->private_dirty += PAGE_SIZE;
-			else
-				mss->private_clean += PAGE_SIZE;
-			mss->pss += pss;
-			if (locked)
-				mss->pss_locked += pss;
-		}
+		unsigned long pss = PAGE_SIZE << PSS_SHIFT;
+		if (mapcount >= 2)
+			pss /= mapcount;
+		smaps_page_accumulate(mss, page, PAGE_SIZE, pss, dirty, locked,
+				      mapcount < 2);
 	}
 }
 
@@ -754,10 +777,23 @@ static void smap_gather_stats(struct vm_area_struct *vma,
 		seq_put_decimal_ull_width(m, str, (val) >> 10, 8)
 
 /* Show the contents common for smaps and smaps_rollup */
-static void __show_smap(struct seq_file *m, const struct mem_size_stats *mss)
+static void __show_smap(struct seq_file *m, const struct mem_size_stats *mss,
+	bool rollup_mode)
 {
 	SEQ_PUT_DEC("Rss:            ", mss->resident);
 	SEQ_PUT_DEC(" kB\nPss:            ", mss->pss >> PSS_SHIFT);
+	if (rollup_mode) {
+		/*
+		 * These are meaningful only for smaps_rollup, otherwise two of
+		 * them are zero, and the other one is the same as Pss.
+		 */
+		SEQ_PUT_DEC(" kB\nPss_Anon:       ",
+			mss->pss_anon >> PSS_SHIFT);
+		SEQ_PUT_DEC(" kB\nPss_File:       ",
+			mss->pss_file >> PSS_SHIFT);
+		SEQ_PUT_DEC(" kB\nPss_Shmem:      ",
+			mss->pss_shmem >> PSS_SHIFT);
+	}
 	SEQ_PUT_DEC(" kB\nShared_Clean:   ", mss->shared_clean);
 	SEQ_PUT_DEC(" kB\nShared_Dirty:   ", mss->shared_dirty);
 	SEQ_PUT_DEC(" kB\nPrivate_Clean:  ", mss->private_clean);
@@ -794,7 +830,7 @@ static int show_smap(struct seq_file *m, void *v)
 	SEQ_PUT_DEC(" kB\nMMUPageSize:    ", vma_mmu_pagesize(vma));
 	seq_puts(m, " kB\n");
 
-	__show_smap(m, &mss);
+	__show_smap(m, &mss, false);
 
 	seq_printf(m, "THPeligible:    %d\n", transparent_hugepage_enabled(vma));
 
@@ -828,7 +864,10 @@ static int show_smaps_rollup(struct seq_file *m, void *v)
 
 	memset(&mss, 0, sizeof(mss));
 
-	down_read(&mm->mmap_sem);
+	ret = down_read_killable(&mm->mmap_sem);
+	if (ret)
+		goto out_put_mm;
+
 	hold_task_mempolicy(priv);
 
 	for (vma = priv->mm->mmap; vma; vma = vma->vm_next) {
@@ -841,12 +880,13 @@ static int show_smaps_rollup(struct seq_file *m, void *v)
 	seq_pad(m, ' ');
 	seq_puts(m, "[rollup]\n");
 
-	__show_smap(m, &mss);
+	__show_smap(m, &mss, true);
 
 	release_task_mempolicy(priv);
 	up_read(&mm->mmap_sem);
-	mmput(mm);
 
+out_put_mm:
+	mmput(mm);
 out_put_task:
 	put_task_struct(priv->task);
 	priv->task = NULL;
@@ -948,10 +988,12 @@ static inline void clear_soft_dirty(struct vm_area_struct *vma,
 	pte_t ptent = *pte;
 
 	if (pte_present(ptent)) {
-		ptent = ptep_modify_prot_start(vma->vm_mm, addr, pte);
-		ptent = pte_wrprotect(ptent);
+		pte_t old_pte;
+
+		old_pte = ptep_modify_prot_start(vma, addr, pte);
+		ptent = pte_wrprotect(old_pte);
 		ptent = pte_clear_soft_dirty(ptent);
-		ptep_modify_prot_commit(vma->vm_mm, addr, pte, ptent);
+		ptep_modify_prot_commit(vma, addr, pte, old_pte, ptent);
 	} else if (is_swap_pte(ptent)) {
 		ptent = pte_swp_clear_soft_dirty(ptent);
 		set_pte_at(vma->vm_mm, addr, pte, ptent);
@@ -1130,7 +1172,10 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 			goto out_mm;
 		}
 
-		down_read(&mm->mmap_sem);
+		if (down_read_killable(&mm->mmap_sem)) {
+			count = -EINTR;
+			goto out_mm;
+		}
 		tlb_gather_mmu(&tlb, mm, 0, -1);
 		if (type == CLEAR_REFS_SOFT_DIRTY) {
 			for (vma = mm->mmap; vma; vma = vma->vm_next) {
@@ -1141,6 +1186,24 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 					count = -EINTR;
 					goto out_mm;
 				}
+				/*
+				 * Avoid to modify vma->vm_flags
+				 * without locked ops while the
+				 * coredump reads the vm_flags.
+				 */
+				if (!mmget_still_valid(mm)) {
+					/*
+					 * Silently return "count"
+					 * like if get_task_mm()
+					 * failed. FIXME: should this
+					 * function have returned
+					 * -ESRCH if get_task_mm()
+					 * failed like if
+					 * get_proc_task() fails?
+					 */
+					up_write(&mm->mmap_sem);
+					goto out_mm;
+				}
 				for (vma = mm->mmap; vma; vma = vma->vm_next) {
 					vma->vm_flags &= ~VM_SOFTDIRTY;
 					vma_set_page_prot(vma);
@@ -1149,7 +1212,8 @@ static ssize_t clear_refs_write(struct file *file, const char __user *buf,
 				break;
 			}
 
-			mmu_notifier_range_init(&range, mm, 0, -1UL);
+			mmu_notifier_range_init(&range, MMU_NOTIFY_SOFT_DIRTY,
+						0, NULL, mm, 0, -1UL);
 			mmu_notifier_invalidate_range_start(&range);
 		}
 		walk_page_range(0, mm->highest_vm_end, &clear_refs_walk);
@@ -1518,7 +1582,9 @@ static ssize_t pagemap_read(struct file *file, char __user *buf,
 		/* overflow ? */
 		if (end < start_vaddr || end > end_vaddr)
 			end = end_vaddr;
-		down_read(&mm->mmap_sem);
+		ret = down_read_killable(&mm->mmap_sem);
+		if (ret)
+			goto out_free;
 		ret = walk_page_range(start_vaddr, end, &pagemap_walk);
 		up_read(&mm->mmap_sem);
 		start_vaddr = end;
diff --git a/fs/proc/task_nommu.c b/fs/proc/task_nommu.c
index 0b63d68dedb2..7907e6419e57 100644
--- a/fs/proc/task_nommu.c
+++ b/fs/proc/task_nommu.c
@@ -64,7 +64,7 @@ void task_mem(struct seq_file *m, struct mm_struct *mm)
 	else
 		bytes += kobjsize(current->files);
 
-	if (current->sighand && atomic_read(&current->sighand->count) > 1)
+	if (current->sighand && refcount_read(&current->sighand->count) > 1)
 		sbytes += kobjsize(current->sighand);
 	else
 		bytes += kobjsize(current->sighand);
@@ -178,7 +178,7 @@ static int nommu_vma_show(struct seq_file *m, struct vm_area_struct *vma)
 		seq_file_path(m, file, "");
 	} else if (mm && is_stack(vma)) {
 		seq_pad(m, ' ');
-		seq_printf(m, "[stack]");
+		seq_puts(m, "[stack]");
 	}
 
 	seq_putc(m, '\n');
@@ -211,7 +211,11 @@ static void *m_start(struct seq_file *m, loff_t *pos)
 	if (!mm || !mmget_not_zero(mm))
 		return NULL;
 
-	down_read(&mm->mmap_sem);
+	if (down_read_killable(&mm->mmap_sem)) {
+		mmput(mm);
+		return ERR_PTR(-EINTR);
+	}
+
 	/* start from the Nth VMA */
 	for (p = rb_first(&mm->mm_rb); p; p = rb_next(p))
 		if (n-- == 0)
diff --git a/fs/proc/thread_self.c b/fs/proc/thread_self.c
index b905010ca9eb..f61ae53533f5 100644
--- a/fs/proc/thread_self.c
+++ b/fs/proc/thread_self.c
@@ -38,6 +38,7 @@ int proc_setup_thread_self(struct super_block *s)
 	struct inode *root_inode = d_inode(s->s_root);
 	struct pid_namespace *ns = proc_pid_ns(root_inode);
 	struct dentry *thread_self;
+	int ret = -ENOMEM;
 
 	inode_lock(root_inode);
 	thread_self = d_alloc_name(s->s_root, "thread-self");
@@ -51,20 +52,19 @@ int proc_setup_thread_self(struct super_block *s)
 			inode->i_gid = GLOBAL_ROOT_GID;
 			inode->i_op = &proc_thread_self_inode_operations;
 			d_add(thread_self, inode);
+			ret = 0;
 		} else {
 			dput(thread_self);
-			thread_self = ERR_PTR(-ENOMEM);
 		}
-	} else {
-		thread_self = ERR_PTR(-ENOMEM);
 	}
 	inode_unlock(root_inode);
-	if (IS_ERR(thread_self)) {
+
+	if (ret)
 		pr_err("proc_fill_super: can't allocate /proc/thread_self\n");
-		return PTR_ERR(thread_self);
-	}
-	ns->proc_thread_self = thread_self;
-	return 0;
+	else
+		ns->proc_thread_self = thread_self;
+
+	return ret;
 }
 
 void __init proc_thread_self_init(void)
diff --git a/fs/proc/vmcore.c b/fs/proc/vmcore.c
index 3fe90443c1bb..57957c91c6df 100644
--- a/fs/proc/vmcore.c
+++ b/fs/proc/vmcore.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *	fs/proc/vmcore.c Interface for accessing the crash
  * 				 dump from the system's previous life.
@@ -165,7 +166,7 @@ void __weak elfcorehdr_free(unsigned long long addr)
  */
 ssize_t __weak elfcorehdr_read(char *buf, size_t count, u64 *ppos)
 {
-	return read_from_oldmem(buf, count, ppos, 0, false);
+	return read_from_oldmem(buf, count, ppos, 0, sev_active());
 }
 
 /*
@@ -173,7 +174,7 @@ ssize_t __weak elfcorehdr_read(char *buf, size_t count, u64 *ppos)
  */
 ssize_t __weak elfcorehdr_read_notes(char *buf, size_t count, u64 *ppos)
 {
-	return read_from_oldmem(buf, count, ppos, 0, sme_active());
+	return read_from_oldmem(buf, count, ppos, 0, mem_encrypt_active());
 }
 
 /*
@@ -373,7 +374,7 @@ static ssize_t __read_vmcore(char *buffer, size_t buflen, loff_t *fpos,
 					    buflen);
 			start = m->paddr + *fpos - m->offset;
 			tmp = read_from_oldmem(buffer, tsz, &start,
-					       userbuf, sme_active());
+					       userbuf, mem_encrypt_active());
 			if (tmp < 0)
 				return tmp;
 			buflen -= tsz;
diff --git a/fs/pstore/Kconfig b/fs/pstore/Kconfig
index 0d19d191ae70..8f0369aad22a 100644
--- a/fs/pstore/Kconfig
+++ b/fs/pstore/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config PSTORE
 	tristate "Persistent store support"
 	select CRYPTO if PSTORE_COMPRESS
diff --git a/fs/pstore/ftrace.c b/fs/pstore/ftrace.c
index b8a0931568f8..bfbfc2698070 100644
--- a/fs/pstore/ftrace.c
+++ b/fs/pstore/ftrace.c
@@ -1,14 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright 2012  Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/kernel.h>
@@ -120,27 +112,13 @@ static struct dentry *pstore_ftrace_dir;
 
 void pstore_register_ftrace(void)
 {
-	struct dentry *file;
-
 	if (!psinfo->write)
 		return;
 
 	pstore_ftrace_dir = debugfs_create_dir("pstore", NULL);
-	if (!pstore_ftrace_dir) {
-		pr_err("%s: unable to create pstore directory\n", __func__);
-		return;
-	}
-
-	file = debugfs_create_file("record_ftrace", 0600, pstore_ftrace_dir,
-				   NULL, &pstore_knob_fops);
-	if (!file) {
-		pr_err("%s: unable to create record_ftrace file\n", __func__);
-		goto err_file;
-	}
 
-	return;
-err_file:
-	debugfs_remove(pstore_ftrace_dir);
+	debugfs_create_file("record_ftrace", 0600, pstore_ftrace_dir, NULL,
+			    &pstore_knob_fops);
 }
 
 void pstore_unregister_ftrace(void)
diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c
index c60ee46f3e39..7fbe8f058220 100644
--- a/fs/pstore/inode.c
+++ b/fs/pstore/inode.c
@@ -1,20 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Persistent Storage - ramfs parts.
  *
  * Copyright (C) 2010 Intel Corporation <tony.luck@intel.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 as
- *  published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #include <linux/module.h>
@@ -115,7 +103,7 @@ static int pstore_ftrace_seq_show(struct seq_file *s, void *v)
 
 	rec = (struct pstore_ftrace_record *)(ps->record->buf + data->off);
 
-	seq_printf(s, "CPU:%d ts:%llu %08lx  %08lx  %pf <- %pF\n",
+	seq_printf(s, "CPU:%d ts:%llu %08lx  %08lx  %ps <- %pS\n",
 		   pstore_ftrace_decode_cpu(rec),
 		   pstore_ftrace_read_timestamp(rec),
 		   rec->ip, rec->parent_ip, (void *)rec->ip,
@@ -330,22 +318,21 @@ int pstore_mkfile(struct dentry *root, struct pstore_record *record)
 		goto fail;
 	inode->i_mode = S_IFREG | 0444;
 	inode->i_fop = &pstore_file_operations;
-	private = kzalloc(sizeof(*private), GFP_KERNEL);
-	if (!private)
-		goto fail_alloc;
-	private->record = record;
-
 	scnprintf(name, sizeof(name), "%s-%s-%llu%s",
 			pstore_type_to_name(record->type),
 			record->psi->name, record->id,
 			record->compressed ? ".enc.z" : "");
 
+	private = kzalloc(sizeof(*private), GFP_KERNEL);
+	if (!private)
+		goto fail_inode;
+
 	dentry = d_alloc_name(root, name);
 	if (!dentry)
 		goto fail_private;
 
+	private->record = record;
 	inode->i_size = private->total_size = size;
-
 	inode->i_private = private;
 
 	if (record->time.tv_sec)
@@ -361,7 +348,7 @@ int pstore_mkfile(struct dentry *root, struct pstore_record *record)
 
 fail_private:
 	free_pstore_private(private);
-fail_alloc:
+fail_inode:
 	iput(inode);
 
 fail:
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 2d1066ed3c28..3d7024662d29 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Persistent Storage - platform driver interface parts.
  *
  * Copyright (C) 2007-2008 Google, Inc.
  * Copyright (C) 2010 Intel Corporation <tony.luck@intel.com>
- *
- *  This program is free software; you can redistribute it and/or modify
- *  it under the terms of the GNU General Public License version 2 as
- *  published by the Free Software Foundation.
- *
- *  This program is distributed in the hope that it will be useful,
- *  but WITHOUT ANY WARRANTY; without even the implied warranty of
- *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- *  GNU General Public License for more details.
- *
- *  You should have received a copy of the GNU General Public License
- *  along with this program; if not, write to the Free Software
- *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  */
 
 #define pr_fmt(fmt) "pstore: " fmt
@@ -347,8 +335,10 @@ static void allocate_buf_for_compression(void)
 
 static void free_buf_for_compression(void)
 {
-	if (IS_ENABLED(CONFIG_PSTORE_COMPRESS) && tfm)
+	if (IS_ENABLED(CONFIG_PSTORE_COMPRESS) && tfm) {
 		crypto_free_comp(tfm);
+		tfm = NULL;
+	}
 	kfree(big_oops_buf);
 	big_oops_buf = NULL;
 	big_oops_buf_sz = 0;
@@ -501,6 +491,9 @@ static void pstore_console_write(struct console *con, const char *s, unsigned c)
 {
 	struct pstore_record record;
 
+	if (!c)
+		return;
+
 	pstore_record_init(&record, psinfo);
 	record.type = PSTORE_TYPE_CONSOLE;
 
@@ -603,7 +596,8 @@ int pstore_register(struct pstore_info *psi)
 		return -EINVAL;
 	}
 
-	allocate_buf_for_compression();
+	if (psi->flags & PSTORE_FLAGS_DMESG)
+		allocate_buf_for_compression();
 
 	if (pstore_is_mounted())
 		pstore_get_records(0);
diff --git a/fs/pstore/pmsg.c b/fs/pstore/pmsg.c
index 97fcef74e5af..d8542ec2f38c 100644
--- a/fs/pstore/pmsg.c
+++ b/fs/pstore/pmsg.c
@@ -1,14 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright 2014  Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
  */
 
 #include <linux/cdev.h>
diff --git a/fs/pstore/ram.c b/fs/pstore/ram.c
index 898c8321b343..2bb3468fc93a 100644
--- a/fs/pstore/ram.c
+++ b/fs/pstore/ram.c
@@ -1,23 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * RAM Oops/Panic logger
  *
  * Copyright (C) 2010 Marco Stornelli <marco.stornelli@gmail.com>
  * Copyright (C) 2011 Kees Cook <keescook@chromium.org>
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * version 2 as published by the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but
- * WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
- * General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
- * 02110-1301 USA
- *
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
@@ -110,7 +96,6 @@ struct ramoops_context {
 };
 
 static struct platform_device *dummy;
-static struct ramoops_platform_data *dummy_data;
 
 static int ramoops_pstore_open(struct pstore_info *psi)
 {
@@ -346,17 +331,15 @@ out:
 static size_t ramoops_write_kmsg_hdr(struct persistent_ram_zone *prz,
 				     struct pstore_record *record)
 {
-	char *hdr;
+	char hdr[36]; /* "===="(4), %lld(20), "."(1), %06lu(6), "-%c\n"(3) */
 	size_t len;
 
-	hdr = kasprintf(GFP_ATOMIC, RAMOOPS_KERNMSG_HDR "%lld.%06lu-%c\n",
+	len = scnprintf(hdr, sizeof(hdr),
+		RAMOOPS_KERNMSG_HDR "%lld.%06lu-%c\n",
 		(time64_t)record->time.tv_sec,
 		record->time.tv_nsec / 1000,
 		record->compressed ? 'C' : 'D');
-	WARN_ON_ONCE(!hdr);
-	len = hdr ? strlen(hdr) : 0;
 	persistent_ram_write(prz, hdr, len);
-	kfree(hdr);
 
 	return len;
 }
@@ -424,6 +407,9 @@ static int notrace ramoops_pstore_write(struct pstore_record *record)
 
 	/* Build header and append record contents. */
 	hlen = ramoops_write_kmsg_hdr(prz, record);
+	if (!hlen)
+		return -ENOMEM;
+
 	size = record->size;
 	if (size + hlen > prz->buffer_size)
 		size = prz->buffer_size - hlen;
@@ -669,6 +655,7 @@ static int ramoops_parse_dt(struct platform_device *pdev,
 			    struct ramoops_platform_data *pdata)
 {
 	struct device_node *of_node = pdev->dev.of_node;
+	struct device_node *parent_node;
 	struct resource *res;
 	u32 value;
 	int ret;
@@ -703,6 +690,26 @@ static int ramoops_parse_dt(struct platform_device *pdev,
 
 #undef parse_size
 
+	/*
+	 * Some old Chromebooks relied on the kernel setting the
+	 * console_size and pmsg_size to the record size since that's
+	 * what the downstream kernel did.  These same Chromebooks had
+	 * "ramoops" straight under the root node which isn't
+	 * according to the current upstream bindings (though it was
+	 * arguably acceptable under a prior version of the bindings).
+	 * Let's make those old Chromebooks work by detecting that
+	 * we're not a child of "reserved-memory" and mimicking the
+	 * expected behavior.
+	 */
+	parent_node = of_get_parent(of_node);
+	if (!of_node_name_eq(parent_node, "reserved-memory") &&
+	    !pdata->console_size && !pdata->ftrace_size &&
+	    !pdata->pmsg_size && !pdata->ecc_info.ecc_size) {
+		pdata->console_size = pdata->record_size;
+		pdata->pmsg_size = pdata->record_size;
+	}
+	of_node_put(parent_node);
+
 	return 0;
 }
 
@@ -716,15 +723,6 @@ static int ramoops_probe(struct platform_device *pdev)
 	phys_addr_t paddr;
 	int err = -EINVAL;
 
-	if (dev_of_node(dev) && !pdata) {
-		pdata = &pdata_local;
-		memset(pdata, 0, sizeof(*pdata));
-
-		err = ramoops_parse_dt(pdev, pdata);
-		if (err < 0)
-			goto fail_out;
-	}
-
 	/*
 	 * Only a single ramoops area allowed at a time, so fail extra
 	 * probes.
@@ -734,6 +732,15 @@ static int ramoops_probe(struct platform_device *pdev)
 		goto fail_out;
 	}
 
+	if (dev_of_node(dev) && !pdata) {
+		pdata = &pdata_local;
+		memset(pdata, 0, sizeof(*pdata));
+
+		err = ramoops_parse_dt(pdev, pdata);
+		if (err < 0)
+			goto fail_out;
+	}
+
 	/* Make sure we didn't get bogus platform data pointer. */
 	if (!pdata) {
 		pr_err("NULL platform data\n");
@@ -800,26 +807,36 @@ static int ramoops_probe(struct platform_device *pdev)
 
 	cxt->pstore.data = cxt;
 	/*
-	 * Since bufsize is only used for dmesg crash dumps, it
-	 * must match the size of the dprz record (after PRZ header
-	 * and ECC bytes have been accounted for).
+	 * Prepare frontend flags based on which areas are initialized.
+	 * For ramoops_init_przs() cases, the "max count" variable tells
+	 * if there are regions present. For ramoops_init_prz() cases,
+	 * the single region size is how to check.
 	 */
-	cxt->pstore.bufsize = cxt->dprzs[0]->buffer_size;
-	cxt->pstore.buf = kzalloc(cxt->pstore.bufsize, GFP_KERNEL);
-	if (!cxt->pstore.buf) {
-		pr_err("cannot allocate pstore crash dump buffer\n");
-		err = -ENOMEM;
-		goto fail_clear;
-	}
-
-	cxt->pstore.flags = PSTORE_FLAGS_DMESG;
+	cxt->pstore.flags = 0;
+	if (cxt->max_dump_cnt)
+		cxt->pstore.flags |= PSTORE_FLAGS_DMESG;
 	if (cxt->console_size)
 		cxt->pstore.flags |= PSTORE_FLAGS_CONSOLE;
-	if (cxt->ftrace_size)
+	if (cxt->max_ftrace_cnt)
 		cxt->pstore.flags |= PSTORE_FLAGS_FTRACE;
 	if (cxt->pmsg_size)
 		cxt->pstore.flags |= PSTORE_FLAGS_PMSG;
 
+	/*
+	 * Since bufsize is only used for dmesg crash dumps, it
+	 * must match the size of the dprz record (after PRZ header
+	 * and ECC bytes have been accounted for).
+	 */
+	if (cxt->pstore.flags & PSTORE_FLAGS_DMESG) {
+		cxt->pstore.bufsize = cxt->dprzs[0]->buffer_size;
+		cxt->pstore.buf = kzalloc(cxt->pstore.bufsize, GFP_KERNEL);
+		if (!cxt->pstore.buf) {
+			pr_err("cannot allocate pstore crash dump buffer\n");
+			err = -ENOMEM;
+			goto fail_clear;
+		}
+	}
+
 	err = pstore_register(&cxt->pstore);
 	if (err) {
 		pr_err("registering with pstore failed\n");
@@ -892,13 +909,12 @@ static inline void ramoops_unregister_dummy(void)
 {
 	platform_device_unregister(dummy);
 	dummy = NULL;
-
-	kfree(dummy_data);
-	dummy_data = NULL;
 }
 
 static void __init ramoops_register_dummy(void)
 {
+	struct ramoops_platform_data pdata;
+
 	/*
 	 * Prepare a dummy platform data structure to carry the module
 	 * parameters. If mem_size isn't set, then there are no module
@@ -909,30 +925,25 @@ static void __init ramoops_register_dummy(void)
 
 	pr_info("using module parameters\n");
 
-	dummy_data = kzalloc(sizeof(*dummy_data), GFP_KERNEL);
-	if (!dummy_data) {
-		pr_info("could not allocate pdata\n");
-		return;
-	}
-
-	dummy_data->mem_size = mem_size;
-	dummy_data->mem_address = mem_address;
-	dummy_data->mem_type = mem_type;
-	dummy_data->record_size = record_size;
-	dummy_data->console_size = ramoops_console_size;
-	dummy_data->ftrace_size = ramoops_ftrace_size;
-	dummy_data->pmsg_size = ramoops_pmsg_size;
-	dummy_data->dump_oops = dump_oops;
-	dummy_data->flags = RAMOOPS_FLAG_FTRACE_PER_CPU;
+	memset(&pdata, 0, sizeof(pdata));
+	pdata.mem_size = mem_size;
+	pdata.mem_address = mem_address;
+	pdata.mem_type = mem_type;
+	pdata.record_size = record_size;
+	pdata.console_size = ramoops_console_size;
+	pdata.ftrace_size = ramoops_ftrace_size;
+	pdata.pmsg_size = ramoops_pmsg_size;
+	pdata.dump_oops = dump_oops;
+	pdata.flags = RAMOOPS_FLAG_FTRACE_PER_CPU;
 
 	/*
 	 * For backwards compatibility ramoops.ecc=1 means 16 bytes ECC
 	 * (using 1 byte for ECC isn't much of use anyway).
 	 */
-	dummy_data->ecc_info.ecc_size = ramoops_ecc == 1 ? 16 : ramoops_ecc;
+	pdata.ecc_info.ecc_size = ramoops_ecc == 1 ? 16 : ramoops_ecc;
 
 	dummy = platform_device_register_data(NULL, "ramoops", -1,
-			dummy_data, sizeof(struct ramoops_platform_data));
+			&pdata, sizeof(pdata));
 	if (IS_ERR(dummy)) {
 		pr_info("could not create platform device: %ld\n",
 			PTR_ERR(dummy));
diff --git a/fs/pstore/ram_core.c b/fs/pstore/ram_core.c
index f375c0735351..8823f65888f0 100644
--- a/fs/pstore/ram_core.c
+++ b/fs/pstore/ram_core.c
@@ -1,15 +1,6 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (C) 2012 Google, Inc.
- *
- * This software is licensed under the terms of the GNU General Public
- * License version 2, as published by the Free Software Foundation, and
- * may be copied, distributed, and modified under those terms.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  */
 
 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
diff --git a/fs/qnx4/Kconfig b/fs/qnx4/Kconfig
index 5f6089994042..45b5b98376c4 100644
--- a/fs/qnx4/Kconfig
+++ b/fs/qnx4/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config QNX4FS_FS
 	tristate "QNX4 file system support (read only)"
 	depends on BLOCK
diff --git a/fs/qnx4/Makefile b/fs/qnx4/Makefile
index 4a283b3f87f8..42d4fc263a3d 100644
--- a/fs/qnx4/Makefile
+++ b/fs/qnx4/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux qnx4-filesystem routines.
 #
diff --git a/fs/qnx4/inode.c b/fs/qnx4/inode.c
index 3d46fe302fcb..922d083bbc7c 100644
--- a/fs/qnx4/inode.c
+++ b/fs/qnx4/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * QNX4 file system, Linux implementation.
  *
@@ -28,14 +29,14 @@
 static const struct super_operations qnx4_sops;
 
 static struct inode *qnx4_alloc_inode(struct super_block *sb);
-static void qnx4_destroy_inode(struct inode *inode);
+static void qnx4_free_inode(struct inode *inode);
 static int qnx4_remount(struct super_block *sb, int *flags, char *data);
 static int qnx4_statfs(struct dentry *, struct kstatfs *);
 
 static const struct super_operations qnx4_sops =
 {
 	.alloc_inode	= qnx4_alloc_inode,
-	.destroy_inode	= qnx4_destroy_inode,
+	.free_inode	= qnx4_free_inode,
 	.statfs		= qnx4_statfs,
 	.remount_fs	= qnx4_remount,
 };
@@ -342,17 +343,11 @@ static struct inode *qnx4_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void qnx4_i_callback(struct rcu_head *head)
+static void qnx4_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(qnx4_inode_cachep, qnx4_i(inode));
 }
 
-static void qnx4_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, qnx4_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct qnx4_inode_info *ei = (struct qnx4_inode_info *) foo;
diff --git a/fs/qnx6/Kconfig b/fs/qnx6/Kconfig
index edbba5c17cc8..6a9d6bce1586 100644
--- a/fs/qnx6/Kconfig
+++ b/fs/qnx6/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config QNX6FS_FS
 	tristate "QNX6 file system support (read only)"
 	depends on BLOCK && CRC32
diff --git a/fs/qnx6/Makefile b/fs/qnx6/Makefile
index 5e6bae6fae50..bd4e6c8efbc6 100644
--- a/fs/qnx6/Makefile
+++ b/fs/qnx6/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux qnx4-filesystem routines.
 #
diff --git a/fs/qnx6/inode.c b/fs/qnx6/inode.c
index 4aeb26bcb4d0..0f8b0ff1ba43 100644
--- a/fs/qnx6/inode.c
+++ b/fs/qnx6/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * QNX6 file system, Linux implementation.
  *
@@ -29,14 +30,14 @@ static const struct super_operations qnx6_sops;
 
 static void qnx6_put_super(struct super_block *sb);
 static struct inode *qnx6_alloc_inode(struct super_block *sb);
-static void qnx6_destroy_inode(struct inode *inode);
+static void qnx6_free_inode(struct inode *inode);
 static int qnx6_remount(struct super_block *sb, int *flags, char *data);
 static int qnx6_statfs(struct dentry *dentry, struct kstatfs *buf);
 static int qnx6_show_options(struct seq_file *seq, struct dentry *root);
 
 static const struct super_operations qnx6_sops = {
 	.alloc_inode	= qnx6_alloc_inode,
-	.destroy_inode	= qnx6_destroy_inode,
+	.free_inode	= qnx6_free_inode,
 	.put_super	= qnx6_put_super,
 	.statfs		= qnx6_statfs,
 	.remount_fs	= qnx6_remount,
@@ -602,17 +603,11 @@ static struct inode *qnx6_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void qnx6_i_callback(struct rcu_head *head)
+static void qnx6_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(qnx6_inode_cachep, QNX6_I(inode));
 }
 
-static void qnx6_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, qnx6_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct qnx6_inode_info *ei = (struct qnx6_inode_info *) foo;
diff --git a/fs/quota/Kconfig b/fs/quota/Kconfig
index 4a09975aac90..7218314ca13f 100644
--- a/fs/quota/Kconfig
+++ b/fs/quota/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 #  Quota configuration
 #
diff --git a/fs/quota/dquot.c b/fs/quota/dquot.c
index fc20e06c56ba..be9c471cdbc8 100644
--- a/fs/quota/dquot.c
+++ b/fs/quota/dquot.c
@@ -9,7 +9,7 @@
  * on the Melbourne quota system as used on BSD derived systems. The internal
  * implementation is based on one of the several variants of the LINUX
  * inode-subsystem with added complexity of the diskquota system.
- * 
+ *
  * Author:	Marco van Wieringen <mvw@planets.elm.net>
  *
  * Fixes:   Dmitry Gorodchanin <pgmdsg@ibi.com>, 11 Feb 96
@@ -51,7 +51,7 @@
  *		Added journalled quota support, fix lock inversion problems
  *		Jan Kara, <jack@suse.cz>, 2003,2004
  *
- * (C) Copyright 1994 - 1997 Marco van Wieringen 
+ * (C) Copyright 1994 - 1997 Marco van Wieringen
  */
 
 #include <linux/errno.h>
@@ -197,7 +197,7 @@ static struct quota_format_type *find_quota_format(int id)
 		int qm;
 
 		spin_unlock(&dq_list_lock);
-		
+
 		for (qm = 0; module_names[qm].qm_fmt_id &&
 			     module_names[qm].qm_fmt_id != id; qm++)
 			;
@@ -223,9 +223,9 @@ static void put_quota_format(struct quota_format_type *fmt)
 
 /*
  * Dquot List Management:
- * The quota code uses three lists for dquot management: the inuse_list,
- * free_dquots, and dquot_hash[] array. A single dquot structure may be
- * on all three lists, depending on its current state.
+ * The quota code uses four lists for dquot management: the inuse_list,
+ * free_dquots, dqi_dirty_list, and dquot_hash[] array. A single dquot
+ * structure may be on some of those lists, depending on its current state.
  *
  * All dquots are placed to the end of inuse_list when first created, and this
  * list is used for invalidate operation, which must look at every dquot.
@@ -236,6 +236,11 @@ static void put_quota_format(struct quota_format_type *fmt)
  * dqstats.free_dquots gives the number of dquots on the list. When
  * dquot is invalidated it's completely released from memory.
  *
+ * Dirty dquots are added to the dqi_dirty_list of quota_info when mark
+ * dirtied, and this list is searched when writing dirty dquots back to
+ * quota file. Note that some filesystems do dirty dquot tracking on their
+ * own (e.g. in a journal) and thus don't use dqi_dirty_list.
+ *
  * Dquots with a specific identity (device, type and id) are placed on
  * one of the dquot_hash[] hash chains. The provides an efficient search
  * mechanism to locate a specific dquot.
@@ -424,10 +429,11 @@ int dquot_acquire(struct dquot *dquot)
 	struct quota_info *dqopt = sb_dqopt(dquot->dq_sb);
 
 	mutex_lock(&dquot->dq_lock);
-	if (!test_bit(DQ_READ_B, &dquot->dq_flags))
+	if (!test_bit(DQ_READ_B, &dquot->dq_flags)) {
 		ret = dqopt->ops[dquot->dq_id.type]->read_dqblk(dquot);
-	if (ret < 0)
-		goto out_iolock;
+		if (ret < 0)
+			goto out_iolock;
+	}
 	/* Make sure flags update is visible after dquot has been filled */
 	smp_mb__before_atomic();
 	set_bit(DQ_READ_B, &dquot->dq_flags);
@@ -1049,7 +1055,9 @@ static void remove_dquot_ref(struct super_block *sb, int type,
 		struct list_head *tofree_head)
 {
 	struct inode *inode;
+#ifdef CONFIG_QUOTA_DEBUG
 	int reserved = 0;
+#endif
 
 	spin_lock(&sb->s_inode_list_lock);
 	list_for_each_entry(inode, &sb->s_inodes, i_sb_list) {
@@ -1061,8 +1069,10 @@ static void remove_dquot_ref(struct super_block *sb, int type,
 		 */
 		spin_lock(&dq_data_lock);
 		if (!IS_NOQUOTA(inode)) {
+#ifdef CONFIG_QUOTA_DEBUG
 			if (unlikely(inode_get_rsv_space(inode) > 0))
 				reserved = 1;
+#endif
 			remove_inode_dquot_ref(inode, type, tofree_head);
 		}
 		spin_unlock(&dq_data_lock);
@@ -1663,7 +1673,7 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags)
 	for (cnt = 0; cnt < MAXQUOTAS; cnt++) {
 		if (!dquots[cnt])
 			continue;
-		if (flags & DQUOT_SPACE_RESERVE) {
+		if (reserve) {
 			ret = dquot_add_space(dquots[cnt], 0, number, flags,
 					      &warn[cnt]);
 		} else {
@@ -1676,13 +1686,11 @@ int __dquot_alloc_space(struct inode *inode, qsize_t number, int flags)
 				if (!dquots[cnt])
 					continue;
 				spin_lock(&dquots[cnt]->dq_dqb_lock);
-				if (flags & DQUOT_SPACE_RESERVE) {
-					dquots[cnt]->dq_dqb.dqb_rsvspace -=
-									number;
-				} else {
-					dquots[cnt]->dq_dqb.dqb_curspace -=
-									number;
-				}
+				if (reserve)
+					dquot_free_reserved_space(dquots[cnt],
+								  number);
+				else
+					dquot_decr_space(dquots[cnt], number);
 				spin_unlock(&dquots[cnt]->dq_dqb_lock);
 			}
 			spin_unlock(&inode->i_lock);
@@ -1733,7 +1741,7 @@ int dquot_alloc_inode(struct inode *inode)
 					continue;
 				/* Back out changes we already did */
 				spin_lock(&dquots[cnt]->dq_dqb_lock);
-				dquots[cnt]->dq_dqb.dqb_curinodes--;
+				dquot_decr_inodes(dquots[cnt], 1);
 				spin_unlock(&dquots[cnt]->dq_dqb_lock);
 			}
 			goto warn_put_all;
@@ -1993,8 +2001,8 @@ int __dquot_transfer(struct inode *inode, struct dquot **transfer_to)
 				       &warn_to[cnt]);
 		if (ret)
 			goto over_quota;
-		ret = dquot_add_space(transfer_to[cnt], cur_space, rsv_space, 0,
-				      &warn_to[cnt]);
+		ret = dquot_add_space(transfer_to[cnt], cur_space, rsv_space,
+				      DQUOT_SPACE_WARN, &warn_to[cnt]);
 		if (ret) {
 			spin_lock(&transfer_to[cnt]->dq_dqb_lock);
 			dquot_decr_inodes(transfer_to[cnt], inode_usage);
@@ -2397,7 +2405,7 @@ out_file_flags:
 out_fmt:
 	put_quota_format(fmt);
 
-	return error; 
+	return error;
 }
 
 /* Reenable quotas on remount RW */
@@ -2775,7 +2783,7 @@ int dquot_get_state(struct super_block *sb, struct qc_state *state)
 	struct qc_type_state *tstate;
 	struct quota_info *dqopt = sb_dqopt(sb);
 	int type;
-  
+
 	memset(state, 0, sizeof(*state));
 	for (type = 0; type < MAXQUOTAS; type++) {
 		if (!sb_has_quota_active(sb, type))
diff --git a/fs/quota/quota.c b/fs/quota/quota.c
index fd5dd806f1b9..cb13fb76dbee 100644
--- a/fs/quota/quota.c
+++ b/fs/quota/quota.c
@@ -331,9 +331,9 @@ static int quota_state_to_flags(struct qc_state *state)
 	return flags;
 }
 
-static int quota_getstate(struct super_block *sb, struct fs_quota_stat *fqs)
+static int quota_getstate(struct super_block *sb, int type,
+			  struct fs_quota_stat *fqs)
 {
-	int type;
 	struct qc_state state;
 	int ret;
 
@@ -349,14 +349,7 @@ static int quota_getstate(struct super_block *sb, struct fs_quota_stat *fqs)
 	if (!fqs->qs_flags)
 		return -ENOSYS;
 	fqs->qs_incoredqs = state.s_incoredqs;
-	/*
-	 * GETXSTATE quotactl has space for just one set of time limits so
-	 * report them for the first enabled quota type
-	 */
-	for (type = 0; type < MAXQUOTAS; type++)
-		if (state.s_state[type].flags & QCI_ACCT_ENABLED)
-			break;
-	BUG_ON(type == MAXQUOTAS);
+
 	fqs->qs_btimelimit = state.s_state[type].spc_timelimit;
 	fqs->qs_itimelimit = state.s_state[type].ino_timelimit;
 	fqs->qs_rtbtimelimit = state.s_state[type].rt_spc_timelimit;
@@ -391,22 +384,22 @@ static int quota_getstate(struct super_block *sb, struct fs_quota_stat *fqs)
 	return 0;
 }
 
-static int quota_getxstate(struct super_block *sb, void __user *addr)
+static int quota_getxstate(struct super_block *sb, int type, void __user *addr)
 {
 	struct fs_quota_stat fqs;
 	int ret;
 
 	if (!sb->s_qcop->get_state)
 		return -ENOSYS;
-	ret = quota_getstate(sb, &fqs);
+	ret = quota_getstate(sb, type, &fqs);
 	if (!ret && copy_to_user(addr, &fqs, sizeof(fqs)))
 		return -EFAULT;
 	return ret;
 }
 
-static int quota_getstatev(struct super_block *sb, struct fs_quota_statv *fqs)
+static int quota_getstatev(struct super_block *sb, int type,
+			   struct fs_quota_statv *fqs)
 {
-	int type;
 	struct qc_state state;
 	int ret;
 
@@ -422,14 +415,7 @@ static int quota_getstatev(struct super_block *sb, struct fs_quota_statv *fqs)
 	if (!fqs->qs_flags)
 		return -ENOSYS;
 	fqs->qs_incoredqs = state.s_incoredqs;
-	/*
-	 * GETXSTATV quotactl has space for just one set of time limits so
-	 * report them for the first enabled quota type
-	 */
-	for (type = 0; type < MAXQUOTAS; type++)
-		if (state.s_state[type].flags & QCI_ACCT_ENABLED)
-			break;
-	BUG_ON(type == MAXQUOTAS);
+
 	fqs->qs_btimelimit = state.s_state[type].spc_timelimit;
 	fqs->qs_itimelimit = state.s_state[type].ino_timelimit;
 	fqs->qs_rtbtimelimit = state.s_state[type].rt_spc_timelimit;
@@ -455,7 +441,7 @@ static int quota_getstatev(struct super_block *sb, struct fs_quota_statv *fqs)
 	return 0;
 }
 
-static int quota_getxstatev(struct super_block *sb, void __user *addr)
+static int quota_getxstatev(struct super_block *sb, int type, void __user *addr)
 {
 	struct fs_quota_statv fqs;
 	int ret;
@@ -474,7 +460,7 @@ static int quota_getxstatev(struct super_block *sb, void __user *addr)
 	default:
 		return -EINVAL;
 	}
-	ret = quota_getstatev(sb, &fqs);
+	ret = quota_getstatev(sb, type, &fqs);
 	if (!ret && copy_to_user(addr, &fqs, sizeof(fqs)))
 		return -EFAULT;
 	return ret;
@@ -744,9 +730,9 @@ static int do_quotactl(struct super_block *sb, int type, int cmd, qid_t id,
 	case Q_XQUOTARM:
 		return quota_rmxquota(sb, addr);
 	case Q_XGETQSTAT:
-		return quota_getxstate(sb, addr);
+		return quota_getxstate(sb, type, addr);
 	case Q_XGETQSTATV:
-		return quota_getxstatev(sb, addr);
+		return quota_getxstatev(sb, type, addr);
 	case Q_XSETQLIM:
 		return quota_setxquota(sb, type, id, addr);
 	case Q_XGETQUOTA:
diff --git a/fs/quota/quota_tree.c b/fs/quota/quota_tree.c
index bb3f59bcfcf5..a6f856f341dc 100644
--- a/fs/quota/quota_tree.c
+++ b/fs/quota/quota_tree.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *	vfsv0 quota IO operations on file
  */
diff --git a/fs/quota/quota_v1.c b/fs/quota/quota_v1.c
index 7ac5298aba70..c740e5572eb8 100644
--- a/fs/quota/quota_v1.c
+++ b/fs/quota/quota_v1.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <linux/errno.h>
 #include <linux/fs.h>
 #include <linux/quota.h>
@@ -127,7 +128,7 @@ static int v1_check_quota_file(struct super_block *sb, int type)
 {
 	struct inode *inode = sb_dqopt(sb)->files[type];
 	ulong blocks;
-	size_t off; 
+	size_t off;
 	struct v2_disk_dqheader dqhead;
 	ssize_t size;
 	loff_t isize;
diff --git a/fs/quota/quota_v2.c b/fs/quota/quota_v2.c
index a73e5b34db41..53429c29c784 100644
--- a/fs/quota/quota_v2.c
+++ b/fs/quota/quota_v2.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *	vfsv0 quota IO operations on file
  */
@@ -78,7 +79,7 @@ static int v2_check_quota_file(struct super_block *sb, int type)
 	struct v2_disk_dqheader dqhead;
 	static const uint quota_magics[] = V2_INITQMAGICS;
 	static const uint quota_versions[] = V2_INITQVERSIONS;
- 
+
 	if (v2_read_header(sb, type, &dqhead))
 		return 0;
 	if (le32_to_cpu(dqhead.dqh_magic) != quota_magics[type] ||
diff --git a/fs/ramfs/Makefile b/fs/ramfs/Makefile
index c71e65dcad25..d1198adb562e 100644
--- a/fs/ramfs/Makefile
+++ b/fs/ramfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux ramfs routines.
 #
diff --git a/fs/ramfs/file-nommu.c b/fs/ramfs/file-nommu.c
index 3ac1f2387083..414695454956 100644
--- a/fs/ramfs/file-nommu.c
+++ b/fs/ramfs/file-nommu.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* file-nommu.c: no-MMU version of ramfs
  *
  * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/module.h>
diff --git a/fs/ramfs/internal.h b/fs/ramfs/internal.h
index a9d8ae88fa15..3257fc1809d9 100644
--- a/fs/ramfs/internal.h
+++ b/fs/ramfs/internal.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* internal.h: ramfs internal definitions
  *
  * Copyright (C) 2005 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 
diff --git a/fs/read_write.c b/fs/read_write.c
index ff3c5e6f87cf..1f5088dec566 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -365,29 +365,37 @@ out_putf:
 int rw_verify_area(int read_write, struct file *file, const loff_t *ppos, size_t count)
 {
 	struct inode *inode;
-	loff_t pos;
 	int retval = -EINVAL;
 
 	inode = file_inode(file);
 	if (unlikely((ssize_t) count < 0))
 		return retval;
-	pos = *ppos;
-	if (unlikely(pos < 0)) {
-		if (!unsigned_offsets(file))
-			return retval;
-		if (count >= -pos) /* both values are in 0..LLONG_MAX */
-			return -EOVERFLOW;
-	} else if (unlikely((loff_t) (pos + count) < 0)) {
-		if (!unsigned_offsets(file))
-			return retval;
-	}
 
-	if (unlikely(inode->i_flctx && mandatory_lock(inode))) {
-		retval = locks_mandatory_area(inode, file, pos, pos + count - 1,
-				read_write == READ ? F_RDLCK : F_WRLCK);
-		if (retval < 0)
-			return retval;
+	/*
+	 * ranged mandatory locking does not apply to streams - it makes sense
+	 * only for files where position has a meaning.
+	 */
+	if (ppos) {
+		loff_t pos = *ppos;
+
+		if (unlikely(pos < 0)) {
+			if (!unsigned_offsets(file))
+				return retval;
+			if (count >= -pos) /* both values are in 0..LLONG_MAX */
+				return -EOVERFLOW;
+		} else if (unlikely((loff_t) (pos + count) < 0)) {
+			if (!unsigned_offsets(file))
+				return retval;
+		}
+
+		if (unlikely(inode->i_flctx && mandatory_lock(inode))) {
+			retval = locks_mandatory_area(inode, file, pos, pos + count - 1,
+					read_write == READ ? F_RDLCK : F_WRLCK);
+			if (retval < 0)
+				return retval;
+		}
 	}
+
 	return security_file_permission(file,
 				read_write == READ ? MAY_READ : MAY_WRITE);
 }
@@ -400,12 +408,13 @@ static ssize_t new_sync_read(struct file *filp, char __user *buf, size_t len, lo
 	ssize_t ret;
 
 	init_sync_kiocb(&kiocb, filp);
-	kiocb.ki_pos = *ppos;
+	kiocb.ki_pos = (ppos ? *ppos : 0);
 	iov_iter_init(&iter, READ, &iov, 1, len);
 
 	ret = call_read_iter(filp, &kiocb, &iter);
 	BUG_ON(ret == -EIOCBQUEUED);
-	*ppos = kiocb.ki_pos;
+	if (ppos)
+		*ppos = kiocb.ki_pos;
 	return ret;
 }
 
@@ -426,7 +435,7 @@ ssize_t kernel_read(struct file *file, void *buf, size_t count, loff_t *pos)
 	ssize_t result;
 
 	old_fs = get_fs();
-	set_fs(get_ds());
+	set_fs(KERNEL_DS);
 	/* The cast to a user pointer is valid due to the set_fs() */
 	result = vfs_read(file, (void __user *)buf, count, pos);
 	set_fs(old_fs);
@@ -468,18 +477,18 @@ static ssize_t new_sync_write(struct file *filp, const char __user *buf, size_t
 	ssize_t ret;
 
 	init_sync_kiocb(&kiocb, filp);
-	kiocb.ki_pos = *ppos;
+	kiocb.ki_pos = (ppos ? *ppos : 0);
 	iov_iter_init(&iter, WRITE, &iov, 1, len);
 
 	ret = call_write_iter(filp, &kiocb, &iter);
 	BUG_ON(ret == -EIOCBQUEUED);
-	if (ret > 0)
+	if (ret > 0 && ppos)
 		*ppos = kiocb.ki_pos;
 	return ret;
 }
 
-ssize_t __vfs_write(struct file *file, const char __user *p, size_t count,
-		    loff_t *pos)
+static ssize_t __vfs_write(struct file *file, const char __user *p,
+			   size_t count, loff_t *pos)
 {
 	if (file->f_op->write)
 		return file->f_op->write(file, p, count, pos);
@@ -499,7 +508,7 @@ ssize_t __kernel_write(struct file *file, const void *buf, size_t count, loff_t
 		return -EINVAL;
 
 	old_fs = get_fs();
-	set_fs(get_ds());
+	set_fs(KERNEL_DS);
 	p = (__force const char __user *)buf;
 	if (count > MAX_RW_COUNT)
 		count =  MAX_RW_COUNT;
@@ -521,7 +530,7 @@ ssize_t kernel_write(struct file *file, const void *buf, size_t count,
 	ssize_t res;
 
 	old_fs = get_fs();
-	set_fs(get_ds());
+	set_fs(KERNEL_DS);
 	/* The cast to a user pointer is valid due to the set_fs() */
 	res = vfs_write(file, (__force const char __user *)buf, count, pos);
 	set_fs(old_fs);
@@ -558,14 +567,10 @@ ssize_t vfs_write(struct file *file, const char __user *buf, size_t count, loff_
 	return ret;
 }
 
-static inline loff_t file_pos_read(struct file *file)
-{
-	return file->f_pos;
-}
-
-static inline void file_pos_write(struct file *file, loff_t pos)
+/* file_ppos returns &file->f_pos or NULL if file is stream */
+static inline loff_t *file_ppos(struct file *file)
 {
-	file->f_pos = pos;
+	return file->f_mode & FMODE_STREAM ? NULL : &file->f_pos;
 }
 
 ssize_t ksys_read(unsigned int fd, char __user *buf, size_t count)
@@ -574,10 +579,14 @@ ssize_t ksys_read(unsigned int fd, char __user *buf, size_t count)
 	ssize_t ret = -EBADF;
 
 	if (f.file) {
-		loff_t pos = file_pos_read(f.file);
-		ret = vfs_read(f.file, buf, count, &pos);
-		if (ret >= 0)
-			file_pos_write(f.file, pos);
+		loff_t pos, *ppos = file_ppos(f.file);
+		if (ppos) {
+			pos = *ppos;
+			ppos = &pos;
+		}
+		ret = vfs_read(f.file, buf, count, ppos);
+		if (ret >= 0 && ppos)
+			f.file->f_pos = pos;
 		fdput_pos(f);
 	}
 	return ret;
@@ -594,10 +603,14 @@ ssize_t ksys_write(unsigned int fd, const char __user *buf, size_t count)
 	ssize_t ret = -EBADF;
 
 	if (f.file) {
-		loff_t pos = file_pos_read(f.file);
-		ret = vfs_write(f.file, buf, count, &pos);
-		if (ret >= 0)
-			file_pos_write(f.file, pos);
+		loff_t pos, *ppos = file_ppos(f.file);
+		if (ppos) {
+			pos = *ppos;
+			ppos = &pos;
+		}
+		ret = vfs_write(f.file, buf, count, ppos);
+		if (ret >= 0 && ppos)
+			f.file->f_pos = pos;
 		fdput_pos(f);
 	}
 
@@ -672,14 +685,15 @@ static ssize_t do_iter_readv_writev(struct file *filp, struct iov_iter *iter,
 	ret = kiocb_set_rw_flags(&kiocb, flags);
 	if (ret)
 		return ret;
-	kiocb.ki_pos = *ppos;
+	kiocb.ki_pos = (ppos ? *ppos : 0);
 
 	if (type == READ)
 		ret = call_read_iter(filp, &kiocb, iter);
 	else
 		ret = call_write_iter(filp, &kiocb, iter);
 	BUG_ON(ret == -EIOCBQUEUED);
-	*ppos = kiocb.ki_pos;
+	if (ppos)
+		*ppos = kiocb.ki_pos;
 	return ret;
 }
 
@@ -1012,10 +1026,14 @@ static ssize_t do_readv(unsigned long fd, const struct iovec __user *vec,
 	ssize_t ret = -EBADF;
 
 	if (f.file) {
-		loff_t pos = file_pos_read(f.file);
-		ret = vfs_readv(f.file, vec, vlen, &pos, flags);
-		if (ret >= 0)
-			file_pos_write(f.file, pos);
+		loff_t pos, *ppos = file_ppos(f.file);
+		if (ppos) {
+			pos = *ppos;
+			ppos = &pos;
+		}
+		ret = vfs_readv(f.file, vec, vlen, ppos, flags);
+		if (ret >= 0 && ppos)
+			f.file->f_pos = pos;
 		fdput_pos(f);
 	}
 
@@ -1032,10 +1050,14 @@ static ssize_t do_writev(unsigned long fd, const struct iovec __user *vec,
 	ssize_t ret = -EBADF;
 
 	if (f.file) {
-		loff_t pos = file_pos_read(f.file);
-		ret = vfs_writev(f.file, vec, vlen, &pos, flags);
-		if (ret >= 0)
-			file_pos_write(f.file, pos);
+		loff_t pos, *ppos = file_ppos(f.file);
+		if (ppos) {
+			pos = *ppos;
+			ppos = &pos;
+		}
+		ret = vfs_writev(f.file, vec, vlen, ppos, flags);
+		if (ret >= 0 && ppos)
+			f.file->f_pos = pos;
 		fdput_pos(f);
 	}
 
@@ -1238,6 +1260,9 @@ COMPAT_SYSCALL_DEFINE5(preadv64v2, unsigned long, fd,
 		const struct compat_iovec __user *,vec,
 		unsigned long, vlen, loff_t, pos, rwf_t, flags)
 {
+	if (pos == -1)
+		return do_compat_readv(fd, vec, vlen, flags);
+
 	return do_compat_preadv64(fd, vec, vlen, pos, flags);
 }
 #endif
@@ -1344,6 +1369,9 @@ COMPAT_SYSCALL_DEFINE5(pwritev64v2, unsigned long, fd,
 		const struct compat_iovec __user *,vec,
 		unsigned long, vlen, loff_t, pos, rwf_t, flags)
 {
+	if (pos == -1)
+		return do_compat_writev(fd, vec, vlen, flags);
+
 	return do_compat_pwritev64(fd, vec, vlen, pos, flags);
 }
 #endif
@@ -1537,6 +1565,58 @@ COMPAT_SYSCALL_DEFINE4(sendfile64, int, out_fd, int, in_fd,
 }
 #endif
 
+/**
+ * generic_copy_file_range - copy data between two files
+ * @file_in:	file structure to read from
+ * @pos_in:	file offset to read from
+ * @file_out:	file structure to write data to
+ * @pos_out:	file offset to write data to
+ * @len:	amount of data to copy
+ * @flags:	copy flags
+ *
+ * This is a generic filesystem helper to copy data from one file to another.
+ * It has no constraints on the source or destination file owners - the files
+ * can belong to different superblocks and different filesystem types. Short
+ * copies are allowed.
+ *
+ * This should be called from the @file_out filesystem, as per the
+ * ->copy_file_range() method.
+ *
+ * Returns the number of bytes copied or a negative error indicating the
+ * failure.
+ */
+
+ssize_t generic_copy_file_range(struct file *file_in, loff_t pos_in,
+				struct file *file_out, loff_t pos_out,
+				size_t len, unsigned int flags)
+{
+	return do_splice_direct(file_in, &pos_in, file_out, &pos_out,
+				len > MAX_RW_COUNT ? MAX_RW_COUNT : len, 0);
+}
+EXPORT_SYMBOL(generic_copy_file_range);
+
+static ssize_t do_copy_file_range(struct file *file_in, loff_t pos_in,
+				  struct file *file_out, loff_t pos_out,
+				  size_t len, unsigned int flags)
+{
+	/*
+	 * Although we now allow filesystems to handle cross sb copy, passing
+	 * a file of the wrong filesystem type to filesystem driver can result
+	 * in an attempt to dereference the wrong type of ->private_data, so
+	 * avoid doing that until we really have a good reason.  NFS defines
+	 * several different file_system_type structures, but they all end up
+	 * using the same ->copy_file_range() function pointer.
+	 */
+	if (file_out->f_op->copy_file_range &&
+	    file_out->f_op->copy_file_range == file_in->f_op->copy_file_range)
+		return file_out->f_op->copy_file_range(file_in, pos_in,
+						       file_out, pos_out,
+						       len, flags);
+
+	return generic_copy_file_range(file_in, pos_in, file_out, pos_out, len,
+				       flags);
+}
+
 /*
  * copy_file_range() differs from regular file read and write in that it
  * specifically allows return partial success.  When it does so is up to
@@ -1546,17 +1626,15 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
 			    struct file *file_out, loff_t pos_out,
 			    size_t len, unsigned int flags)
 {
-	struct inode *inode_in = file_inode(file_in);
-	struct inode *inode_out = file_inode(file_out);
 	ssize_t ret;
 
 	if (flags != 0)
 		return -EINVAL;
 
-	if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode))
-		return -EISDIR;
-	if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode))
-		return -EINVAL;
+	ret = generic_copy_file_checks(file_in, pos_in, file_out, pos_out, &len,
+				       flags);
+	if (unlikely(ret))
+		return ret;
 
 	ret = rw_verify_area(READ, file_in, &pos_in, len);
 	if (unlikely(ret))
@@ -1566,15 +1644,6 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
 	if (unlikely(ret))
 		return ret;
 
-	if (!(file_in->f_mode & FMODE_READ) ||
-	    !(file_out->f_mode & FMODE_WRITE) ||
-	    (file_out->f_flags & O_APPEND))
-		return -EBADF;
-
-	/* this could be relaxed once a method supports cross-fs copies */
-	if (inode_in->i_sb != inode_out->i_sb)
-		return -EXDEV;
-
 	if (len == 0)
 		return 0;
 
@@ -1584,7 +1653,8 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
 	 * Try cloning first, this is supported by more file systems, and
 	 * more efficient if both clone and copy are supported (e.g. NFS).
 	 */
-	if (file_in->f_op->remap_file_range) {
+	if (file_in->f_op->remap_file_range &&
+	    file_inode(file_in)->i_sb == file_inode(file_out)->i_sb) {
 		loff_t cloned;
 
 		cloned = file_in->f_op->remap_file_range(file_in, pos_in,
@@ -1597,16 +1667,9 @@ ssize_t vfs_copy_file_range(struct file *file_in, loff_t pos_in,
 		}
 	}
 
-	if (file_out->f_op->copy_file_range) {
-		ret = file_out->f_op->copy_file_range(file_in, pos_in, file_out,
-						      pos_out, len, flags);
-		if (ret != -EOPNOTSUPP)
-			goto done;
-	}
-
-	ret = do_splice_direct(file_in, &pos_in, file_out, &pos_out,
-			len > MAX_RW_COUNT ? MAX_RW_COUNT : len, 0);
-
+	ret = do_copy_file_range(file_in, pos_in, file_out, pos_out, len,
+				flags);
+	WARN_ON_ONCE(ret == -EOPNOTSUPP);
 done:
 	if (ret > 0) {
 		fsnotify_access(file_in);
@@ -1923,25 +1986,10 @@ int generic_remap_file_range_prep(struct file *file_in, loff_t pos_in,
 		return ret;
 
 	/* If can't alter the file contents, we're done. */
-	if (!(remap_flags & REMAP_FILE_DEDUP)) {
-		/* Update the timestamps, since we can alter file contents. */
-		if (!(file_out->f_mode & FMODE_NOCMTIME)) {
-			ret = file_update_time(file_out);
-			if (ret)
-				return ret;
-		}
-
-		/*
-		 * Clear the security bits if the process is not being run by
-		 * root.  This keeps people from modifying setuid and setgid
-		 * binaries.
-		 */
-		ret = file_remove_privs(file_out);
-		if (ret)
-			return ret;
-	}
+	if (!(remap_flags & REMAP_FILE_DEDUP))
+		ret = file_modified(file_out);
 
-	return 0;
+	return ret;
 }
 EXPORT_SYMBOL(generic_remap_file_range_prep);
 
@@ -1949,29 +1997,21 @@ loff_t do_clone_file_range(struct file *file_in, loff_t pos_in,
 			   struct file *file_out, loff_t pos_out,
 			   loff_t len, unsigned int remap_flags)
 {
-	struct inode *inode_in = file_inode(file_in);
-	struct inode *inode_out = file_inode(file_out);
 	loff_t ret;
 
 	WARN_ON_ONCE(remap_flags & REMAP_FILE_DEDUP);
 
-	if (S_ISDIR(inode_in->i_mode) || S_ISDIR(inode_out->i_mode))
-		return -EISDIR;
-	if (!S_ISREG(inode_in->i_mode) || !S_ISREG(inode_out->i_mode))
-		return -EINVAL;
-
 	/*
 	 * FICLONE/FICLONERANGE ioctls enforce that src and dest files are on
 	 * the same mount. Practically, they only need to be on the same file
 	 * system.
 	 */
-	if (inode_in->i_sb != inode_out->i_sb)
+	if (file_inode(file_in)->i_sb != file_inode(file_out)->i_sb)
 		return -EXDEV;
 
-	if (!(file_in->f_mode & FMODE_READ) ||
-	    !(file_out->f_mode & FMODE_WRITE) ||
-	    (file_out->f_flags & O_APPEND))
-		return -EBADF;
+	ret = generic_file_rw_checks(file_in, file_out);
+	if (ret < 0)
+		return ret;
 
 	if (!file_in->f_op->remap_file_range)
 		return -EOPNOTSUPP;
diff --git a/fs/reiserfs/Kconfig b/fs/reiserfs/Kconfig
index 86e71c0caf48..8fd54ed8f844 100644
--- a/fs/reiserfs/Kconfig
+++ b/fs/reiserfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config REISERFS_FS
 	tristate "Reiserfs support"
 	select CRC32
diff --git a/fs/reiserfs/ioctl.c b/fs/reiserfs/ioctl.c
index acbbaf7a0bb2..45e1a5d11af3 100644
--- a/fs/reiserfs/ioctl.c
+++ b/fs/reiserfs/ioctl.c
@@ -74,13 +74,11 @@ long reiserfs_ioctl(struct file *filp, unsigned int cmd, unsigned long arg)
 				err = -EPERM;
 				goto setflags_out;
 			}
-			if (((flags ^ REISERFS_I(inode)->
-			      i_attrs) & (REISERFS_IMMUTABLE_FL |
-					  REISERFS_APPEND_FL))
-			    && !capable(CAP_LINUX_IMMUTABLE)) {
-				err = -EPERM;
+			err = vfs_ioc_setflags_prepare(inode,
+						     REISERFS_I(inode)->i_attrs,
+						     flags);
+			if (err)
 				goto setflags_out;
-			}
 			if ((flags & REISERFS_NOTAIL_FL) &&
 			    S_ISREG(inode->i_mode)) {
 				int result;
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index 8a76f9d14bc6..36346dc4cec0 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -1844,7 +1844,7 @@ static int flush_used_journal_lists(struct super_block *s,
  * removes any nodes in table with name block and dev as bh.
  * only touchs the hnext and hprev pointers.
  */
-void remove_journal_hash(struct super_block *sb,
+static void remove_journal_hash(struct super_block *sb,
 			 struct reiserfs_journal_cnode **table,
 			 struct reiserfs_journal_list *jl,
 			 unsigned long block, int remove_freed)
diff --git a/fs/reiserfs/super.c b/fs/reiserfs/super.c
index 1fc934d24459..ab028ea0e561 100644
--- a/fs/reiserfs/super.c
+++ b/fs/reiserfs/super.c
@@ -650,17 +650,11 @@ static struct inode *reiserfs_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void reiserfs_i_callback(struct rcu_head *head)
+static void reiserfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(reiserfs_inode_cachep, REISERFS_I(inode));
 }
 
-static void reiserfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, reiserfs_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct reiserfs_inode_info *ei = (struct reiserfs_inode_info *)foo;
@@ -815,7 +809,7 @@ static struct dquot **reiserfs_get_dquots(struct inode *inode)
 
 static const struct super_operations reiserfs_sops = {
 	.alloc_inode = reiserfs_alloc_inode,
-	.destroy_inode = reiserfs_destroy_inode,
+	.free_inode = reiserfs_free_inode,
 	.write_inode = reiserfs_write_inode,
 	.dirty_inode = reiserfs_dirty_inode,
 	.evict_inode = reiserfs_evict_inode,
diff --git a/fs/reiserfs/xattr.c b/fs/reiserfs/xattr.c
index 32d8986c26fb..b5b26d8a192c 100644
--- a/fs/reiserfs/xattr.c
+++ b/fs/reiserfs/xattr.c
@@ -450,6 +450,15 @@ fail:
 
 static inline __u32 xattr_hash(const char *msg, int len)
 {
+	/*
+	 * csum_partial() gives different results for little-endian and
+	 * big endian hosts. Images created on little-endian hosts and
+	 * mounted on big-endian hosts(and vice versa) will see csum mismatches
+	 * when trying to fetch xattrs. Treating the hash as __wsum_t would
+	 * lower the frequency of mismatch.  This is an endianness bug in
+	 * reiserfs.  The return statement would result in a sparse warning. Do
+	 * not fix the sparse warning so as to not hide a reminder of the bug.
+	 */
 	return csum_partial(msg, len, 0);
 }
 
diff --git a/fs/romfs/Kconfig b/fs/romfs/Kconfig
index ce2d6bcc6266..ad4c45788896 100644
--- a/fs/romfs/Kconfig
+++ b/fs/romfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config ROMFS_FS
 	tristate "ROM file system support"
 	depends on BLOCK || MTD
diff --git a/fs/romfs/internal.h b/fs/romfs/internal.h
index 95217b830118..e90df22bdc82 100644
--- a/fs/romfs/internal.h
+++ b/fs/romfs/internal.h
@@ -1,12 +1,8 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /* RomFS internal definitions
  *
  * Copyright © 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/romfs_fs.h>
diff --git a/fs/romfs/mmap-nommu.c b/fs/romfs/mmap-nommu.c
index 1118a0dc6b45..2c4a23113fb5 100644
--- a/fs/romfs/mmap-nommu.c
+++ b/fs/romfs/mmap-nommu.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* NOMMU mmap support for RomFS on MTD devices
  *
  * Copyright © 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/mm.h>
diff --git a/fs/romfs/storage.c b/fs/romfs/storage.c
index f86f51f99ace..6b2b4362089e 100644
--- a/fs/romfs/storage.c
+++ b/fs/romfs/storage.c
@@ -1,12 +1,8 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /* RomFS storage access routines
  *
  * Copyright © 2007 Red Hat, Inc. All Rights Reserved.
  * Written by David Howells (dhowells@redhat.com)
- *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version
- * 2 of the License, or (at your option) any later version.
  */
 
 #include <linux/fs.h>
diff --git a/fs/romfs/super.c b/fs/romfs/super.c
index 6ccb51993a76..7d580f7c3f1d 100644
--- a/fs/romfs/super.c
+++ b/fs/romfs/super.c
@@ -381,18 +381,11 @@ static struct inode *romfs_alloc_inode(struct super_block *sb)
 /*
  * return a spent inode to the slab cache
  */
-static void romfs_i_callback(struct rcu_head *head)
+static void romfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-
 	kmem_cache_free(romfs_inode_cachep, ROMFS_I(inode));
 }
 
-static void romfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, romfs_i_callback);
-}
-
 /*
  * get filesystem statistics
  */
@@ -439,7 +432,7 @@ static int romfs_remount(struct super_block *sb, int *flags, char *data)
 
 static const struct super_operations romfs_super_ops = {
 	.alloc_inode	= romfs_alloc_inode,
-	.destroy_inode	= romfs_destroy_inode,
+	.free_inode	= romfs_free_inode,
 	.statfs		= romfs_statfs,
 	.remount_fs	= romfs_remount,
 };
diff --git a/fs/select.c b/fs/select.c
index d0f35dbc0e8f..a4d8f6e8b63c 100644
--- a/fs/select.c
+++ b/fs/select.c
@@ -758,10 +758,9 @@ static long do_pselect(int n, fd_set __user *inp, fd_set __user *outp,
 		return ret;
 
 	ret = core_sys_select(n, inp, outp, exp, to);
+	restore_user_sigmask(sigmask, &sigsaved, ret == -ERESTARTNOHAND);
 	ret = poll_select_copy_remaining(&end_time, tsp, type, ret);
 
-	restore_user_sigmask(sigmask, &sigsaved);
-
 	return ret;
 }
 
@@ -1106,8 +1105,7 @@ SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds, unsigned int, nfds,
 
 	ret = do_sys_poll(ufds, nfds, to);
 
-	restore_user_sigmask(sigmask, &sigsaved);
-
+	restore_user_sigmask(sigmask, &sigsaved, ret == -EINTR);
 	/* We can restart this syscall, usually */
 	if (ret == -EINTR)
 		ret = -ERESTARTNOHAND;
@@ -1142,8 +1140,7 @@ SYSCALL_DEFINE5(ppoll_time32, struct pollfd __user *, ufds, unsigned int, nfds,
 
 	ret = do_sys_poll(ufds, nfds, to);
 
-	restore_user_sigmask(sigmask, &sigsaved);
-
+	restore_user_sigmask(sigmask, &sigsaved, ret == -EINTR);
 	/* We can restart this syscall, usually */
 	if (ret == -EINTR)
 		ret = -ERESTARTNOHAND;
@@ -1350,10 +1347,9 @@ static long do_compat_pselect(int n, compat_ulong_t __user *inp,
 		return ret;
 
 	ret = compat_core_sys_select(n, inp, outp, exp, to);
+	restore_user_sigmask(sigmask, &sigsaved, ret == -ERESTARTNOHAND);
 	ret = poll_select_copy_remaining(&end_time, tsp, type, ret);
 
-	restore_user_sigmask(sigmask, &sigsaved);
-
 	return ret;
 }
 
@@ -1379,7 +1375,7 @@ COMPAT_SYSCALL_DEFINE6(pselect6_time64, int, n, compat_ulong_t __user *, inp,
 
 #if defined(CONFIG_COMPAT_32BIT_TIME)
 
-COMPAT_SYSCALL_DEFINE6(pselect6, int, n, compat_ulong_t __user *, inp,
+COMPAT_SYSCALL_DEFINE6(pselect6_time32, int, n, compat_ulong_t __user *, inp,
 	compat_ulong_t __user *, outp, compat_ulong_t __user *, exp,
 	struct old_timespec32 __user *, tsp, void __user *, sig)
 {
@@ -1402,7 +1398,7 @@ COMPAT_SYSCALL_DEFINE6(pselect6, int, n, compat_ulong_t __user *, inp,
 #endif
 
 #if defined(CONFIG_COMPAT_32BIT_TIME)
-COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds,
+COMPAT_SYSCALL_DEFINE5(ppoll_time32, struct pollfd __user *, ufds,
 	unsigned int,  nfds, struct old_timespec32 __user *, tsp,
 	const compat_sigset_t __user *, sigmask, compat_size_t, sigsetsize)
 {
@@ -1425,8 +1421,7 @@ COMPAT_SYSCALL_DEFINE5(ppoll, struct pollfd __user *, ufds,
 
 	ret = do_sys_poll(ufds, nfds, to);
 
-	restore_user_sigmask(sigmask, &sigsaved);
-
+	restore_user_sigmask(sigmask, &sigsaved, ret == -EINTR);
 	/* We can restart this syscall, usually */
 	if (ret == -EINTR)
 		ret = -ERESTARTNOHAND;
@@ -1461,8 +1456,7 @@ COMPAT_SYSCALL_DEFINE5(ppoll_time64, struct pollfd __user *, ufds,
 
 	ret = do_sys_poll(ufds, nfds, to);
 
-	restore_user_sigmask(sigmask, &sigsaved);
-
+	restore_user_sigmask(sigmask, &sigsaved, ret == -EINTR);
 	/* We can restart this syscall, usually */
 	if (ret == -EINTR)
 		ret = -ERESTARTNOHAND;
diff --git a/fs/seq_file.c b/fs/seq_file.c
index 1dea7a8a5255..04f09689cd6d 100644
--- a/fs/seq_file.c
+++ b/fs/seq_file.c
@@ -317,6 +317,7 @@ loff_t seq_lseek(struct file *file, loff_t offset, int whence)
 	switch (whence) {
 	case SEEK_CUR:
 		offset += file->f_pos;
+		/* fall through */
 	case SEEK_SET:
 		if (offset < 0)
 			break;
@@ -383,6 +384,17 @@ void seq_escape(struct seq_file *m, const char *s, const char *esc)
 }
 EXPORT_SYMBOL(seq_escape);
 
+void seq_escape_mem_ascii(struct seq_file *m, const char *src, size_t isz)
+{
+	char *buf;
+	size_t size = seq_get_buf(m, &buf);
+	int ret;
+
+	ret = string_escape_mem_ascii(src, isz, buf, size);
+	seq_commit(m, ret < size ? ret : -1);
+}
+EXPORT_SYMBOL(seq_escape_mem_ascii);
+
 void seq_vprintf(struct seq_file *m, const char *f, va_list args)
 {
 	int len;
diff --git a/fs/signalfd.c b/fs/signalfd.c
index 757afc7c5895..44b6845b071c 100644
--- a/fs/signalfd.c
+++ b/fs/signalfd.c
@@ -176,6 +176,7 @@ static ssize_t signalfd_dequeue(struct signalfd_ctx *ctx, kernel_siginfo_t *info
 		if (!nonblock)
 			break;
 		ret = -EAGAIN;
+		/* fall through */
 	default:
 		spin_unlock_irq(&current->sighand->siglock);
 		return ret;
diff --git a/fs/splice.c b/fs/splice.c
index de2ede048473..98412721f056 100644
--- a/fs/splice.c
+++ b/fs/splice.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * "splice": joining two ropes together by interweaving their strands.
  *
@@ -138,7 +139,6 @@ error:
 }
 
 const struct pipe_buf_operations page_cache_pipe_buf_ops = {
-	.can_merge = 0,
 	.confirm = page_cache_pipe_buf_confirm,
 	.release = page_cache_pipe_buf_release,
 	.steal = page_cache_pipe_buf_steal,
@@ -156,7 +156,6 @@ static int user_page_pipe_buf_steal(struct pipe_inode_info *pipe,
 }
 
 static const struct pipe_buf_operations user_page_pipe_buf_ops = {
-	.can_merge = 0,
 	.confirm = generic_pipe_buf_confirm,
 	.release = page_cache_pipe_buf_release,
 	.steal = user_page_pipe_buf_steal,
@@ -326,22 +325,20 @@ ssize_t generic_file_splice_read(struct file *in, loff_t *ppos,
 EXPORT_SYMBOL(generic_file_splice_read);
 
 const struct pipe_buf_operations default_pipe_buf_ops = {
-	.can_merge = 0,
 	.confirm = generic_pipe_buf_confirm,
 	.release = generic_pipe_buf_release,
 	.steal = generic_pipe_buf_steal,
 	.get = generic_pipe_buf_get,
 };
 
-static int generic_pipe_buf_nosteal(struct pipe_inode_info *pipe,
-				    struct pipe_buffer *buf)
+int generic_pipe_buf_nosteal(struct pipe_inode_info *pipe,
+			     struct pipe_buffer *buf)
 {
 	return 1;
 }
 
 /* Pipe buffer operations for a socket and similar. */
 const struct pipe_buf_operations nosteal_pipe_buf_ops = {
-	.can_merge = 0,
 	.confirm = generic_pipe_buf_confirm,
 	.release = generic_pipe_buf_release,
 	.steal = generic_pipe_buf_nosteal,
@@ -357,7 +354,7 @@ static ssize_t kernel_readv(struct file *file, const struct kvec *vec,
 	ssize_t res;
 
 	old_fs = get_fs();
-	set_fs(get_ds());
+	set_fs(KERNEL_DS);
 	/* The cast to a user pointer is valid due to the set_fs() */
 	res = vfs_readv(file, (const struct iovec __user *)vec, vlen, &pos, 0);
 	set_fs(old_fs);
@@ -1123,6 +1120,9 @@ static long do_splice(struct file *in, loff_t __user *off_in,
 		if (ipipe == opipe)
 			return -EINVAL;
 
+		if ((in->f_flags | out->f_flags) & O_NONBLOCK)
+			flags |= SPLICE_F_NONBLOCK;
+
 		return splice_pipe_to_pipe(ipipe, opipe, len, flags);
 	}
 
@@ -1148,6 +1148,9 @@ static long do_splice(struct file *in, loff_t __user *off_in,
 		if (unlikely(ret < 0))
 			return ret;
 
+		if (in->f_flags & O_NONBLOCK)
+			flags |= SPLICE_F_NONBLOCK;
+
 		file_start_write(out);
 		ret = do_splice_from(ipipe, out, &offset, len, flags);
 		file_end_write(out);
@@ -1172,6 +1175,9 @@ static long do_splice(struct file *in, loff_t __user *off_in,
 			offset = in->f_pos;
 		}
 
+		if (out->f_flags & O_NONBLOCK)
+			flags |= SPLICE_F_NONBLOCK;
+
 		pipe_lock(opipe);
 		ret = wait_for_space(opipe, flags);
 		if (!ret)
@@ -1350,7 +1356,7 @@ SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov,
 	struct iovec iovstack[UIO_FASTIOV];
 	struct iovec *iov = iovstack;
 	struct iov_iter iter;
-	long error;
+	ssize_t error;
 	struct fd f;
 	int type;
 
@@ -1361,7 +1367,7 @@ SYSCALL_DEFINE4(vmsplice, int, fd, const struct iovec __user *, uiov,
 
 	error = import_iovec(type, uiov, nr_segs,
 			     ARRAY_SIZE(iovstack), &iov, &iter);
-	if (!error) {
+	if (error >= 0) {
 		error = do_vmsplice(f.file, &iter, flags);
 		kfree(iov);
 	}
@@ -1376,7 +1382,7 @@ COMPAT_SYSCALL_DEFINE4(vmsplice, int, fd, const struct compat_iovec __user *, io
 	struct iovec iovstack[UIO_FASTIOV];
 	struct iovec *iov = iovstack;
 	struct iov_iter iter;
-	long error;
+	ssize_t error;
 	struct fd f;
 	int type;
 
@@ -1387,7 +1393,7 @@ COMPAT_SYSCALL_DEFINE4(vmsplice, int, fd, const struct compat_iovec __user *, io
 
 	error = compat_import_iovec(type, iov32, nr_segs,
 			     ARRAY_SIZE(iovstack), &iov, &iter);
-	if (!error) {
+	if (error >= 0) {
 		error = do_vmsplice(f.file, &iter, flags);
 		kfree(iov);
 	}
@@ -1588,7 +1594,11 @@ retry:
 			 * Get a reference to this pipe buffer,
 			 * so we can copy the contents over.
 			 */
-			pipe_buf_get(ipipe, ibuf);
+			if (!pipe_buf_get(ipipe, ibuf)) {
+				if (ret == 0)
+					ret = -EFAULT;
+				break;
+			}
 			*obuf = *ibuf;
 
 			/*
@@ -1597,6 +1607,8 @@ retry:
 			 */
 			obuf->flags &= ~PIPE_BUF_FLAG_GIFT;
 
+			pipe_buf_mark_unmergeable(obuf);
+
 			obuf->len = len;
 			opipe->nrbufs++;
 			ibuf->offset += obuf->len;
@@ -1660,7 +1672,11 @@ static int link_pipe(struct pipe_inode_info *ipipe,
 		 * Get a reference to this pipe buffer,
 		 * so we can copy the contents over.
 		 */
-		pipe_buf_get(ipipe, ibuf);
+		if (!pipe_buf_get(ipipe, ibuf)) {
+			if (ret == 0)
+				ret = -EFAULT;
+			break;
+		}
 
 		obuf = opipe->bufs + nbuf;
 		*obuf = *ibuf;
@@ -1671,6 +1687,8 @@ static int link_pipe(struct pipe_inode_info *ipipe,
 		 */
 		obuf->flags &= ~PIPE_BUF_FLAG_GIFT;
 
+		pipe_buf_mark_unmergeable(obuf);
+
 		if (obuf->len > len)
 			obuf->len = len;
 
@@ -1717,6 +1735,9 @@ static long do_tee(struct file *in, struct file *out, size_t len,
 	 * copying the data.
 	 */
 	if (ipipe && opipe && ipipe != opipe) {
+		if ((in->f_flags | out->f_flags) & O_NONBLOCK)
+			flags |= SPLICE_F_NONBLOCK;
+
 		/*
 		 * Keep going, unless we encounter an error. The ipipe/opipe
 		 * ordering doesn't really matter.
diff --git a/fs/squashfs/Kconfig b/fs/squashfs/Kconfig
index 1adb3346b9d6..916e78fabcaa 100644
--- a/fs/squashfs/Kconfig
+++ b/fs/squashfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config SQUASHFS
 	tristate "SquashFS 4.0 - Squashed file system support"
 	depends on BLOCK
diff --git a/fs/squashfs/block.c b/fs/squashfs/block.c
index f098b9f1c396..4f9b9fb59362 100644
--- a/fs/squashfs/block.c
+++ b/fs/squashfs/block.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * block.c
  */
 
diff --git a/fs/squashfs/cache.c b/fs/squashfs/cache.c
index 0839efa720b3..5062326d0efb 100644
--- a/fs/squashfs/cache.c
+++ b/fs/squashfs/cache.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * cache.c
  */
 
diff --git a/fs/squashfs/decompressor.c b/fs/squashfs/decompressor.c
index 836639810ea0..d57bef91ab08 100644
--- a/fs/squashfs/decompressor.c
+++ b/fs/squashfs/decompressor.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * decompressor.c
  */
 
diff --git a/fs/squashfs/decompressor.h b/fs/squashfs/decompressor.h
index 0f5a8e4e58da..ec8617523e56 100644
--- a/fs/squashfs/decompressor.h
+++ b/fs/squashfs/decompressor.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef DECOMPRESSOR_H
 #define DECOMPRESSOR_H
 /*
@@ -6,20 +7,6 @@
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * decompressor.h
  */
 
diff --git a/fs/squashfs/decompressor_multi.c b/fs/squashfs/decompressor_multi.c
index d6008a636479..c181dee235bb 100644
--- a/fs/squashfs/decompressor_multi.c
+++ b/fs/squashfs/decompressor_multi.c
@@ -1,9 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  Copyright (c) 2013
  *  Minchan Kim <minchan@kernel.org>
- *
- *  This work is licensed under the terms of the GNU GPL, version 2. See
- *  the COPYING file in the top-level directory.
  */
 #include <linux/types.h>
 #include <linux/mutex.h>
diff --git a/fs/squashfs/decompressor_multi_percpu.c b/fs/squashfs/decompressor_multi_percpu.c
index 23a9c28ad8ea..2a2a2d106440 100644
--- a/fs/squashfs/decompressor_multi_percpu.c
+++ b/fs/squashfs/decompressor_multi_percpu.c
@@ -1,9 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2013
  * Phillip Lougher <phillip@squashfs.org.uk>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
  */
 
 #include <linux/types.h>
diff --git a/fs/squashfs/decompressor_single.c b/fs/squashfs/decompressor_single.c
index a6c75929a00e..550c3e592032 100644
--- a/fs/squashfs/decompressor_single.c
+++ b/fs/squashfs/decompressor_single.c
@@ -1,9 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2013
  * Phillip Lougher <phillip@squashfs.org.uk>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
  */
 
 #include <linux/types.h>
diff --git a/fs/squashfs/dir.c b/fs/squashfs/dir.c
index a5845f94a2a1..a2ade63eccdf 100644
--- a/fs/squashfs/dir.c
+++ b/fs/squashfs/dir.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * dir.c
  */
 
diff --git a/fs/squashfs/export.c b/fs/squashfs/export.c
index 8073b6532cf0..ae2c87bb0fbe 100644
--- a/fs/squashfs/export.c
+++ b/fs/squashfs/export.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * export.c
  */
 
diff --git a/fs/squashfs/file.c b/fs/squashfs/file.c
index f1c1430ae721..7b1128398976 100644
--- a/fs/squashfs/file.c
+++ b/fs/squashfs/file.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * file.c
  */
 
diff --git a/fs/squashfs/file_cache.c b/fs/squashfs/file_cache.c
index a9ba8d96776a..54c17b7c85fd 100644
--- a/fs/squashfs/file_cache.c
+++ b/fs/squashfs/file_cache.c
@@ -1,9 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2013
  * Phillip Lougher <phillip@squashfs.org.uk>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
  */
 
 #include <linux/fs.h>
diff --git a/fs/squashfs/file_direct.c b/fs/squashfs/file_direct.c
index 80db1b86a27c..a4894cc59447 100644
--- a/fs/squashfs/file_direct.c
+++ b/fs/squashfs/file_direct.c
@@ -1,9 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2013
  * Phillip Lougher <phillip@squashfs.org.uk>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
  */
 
 #include <linux/fs.h>
diff --git a/fs/squashfs/fragment.c b/fs/squashfs/fragment.c
index 0681feab4a84..49602b9a42e1 100644
--- a/fs/squashfs/fragment.c
+++ b/fs/squashfs/fragment.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * fragment.c
  */
 
diff --git a/fs/squashfs/id.c b/fs/squashfs/id.c
index d38ea3dab951..6be5afe7287d 100644
--- a/fs/squashfs/id.c
+++ b/fs/squashfs/id.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * id.c
  */
 
diff --git a/fs/squashfs/inode.c b/fs/squashfs/inode.c
index e9793b1e49a5..24463145b351 100644
--- a/fs/squashfs/inode.c
+++ b/fs/squashfs/inode.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * inode.c
  */
 
diff --git a/fs/squashfs/lz4_wrapper.c b/fs/squashfs/lz4_wrapper.c
index 95da65366548..c4e47e0588c7 100644
--- a/fs/squashfs/lz4_wrapper.c
+++ b/fs/squashfs/lz4_wrapper.c
@@ -1,9 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2013, 2014
  * Phillip Lougher <phillip@squashfs.org.uk>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
  */
 
 #include <linux/buffer_head.h>
diff --git a/fs/squashfs/lzo_wrapper.c b/fs/squashfs/lzo_wrapper.c
index 934c17e96590..aa3c3dafc33d 100644
--- a/fs/squashfs/lzo_wrapper.c
+++ b/fs/squashfs/lzo_wrapper.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2010 LG Electronics
  * Chan Jeong <chan.jeong@lge.com>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * lzo_wrapper.c
  */
 
diff --git a/fs/squashfs/namei.c b/fs/squashfs/namei.c
index 40c10d9974c9..11e4539b9eae 100644
--- a/fs/squashfs/namei.c
+++ b/fs/squashfs/namei.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * namei.c
  */
 
diff --git a/fs/squashfs/page_actor.c b/fs/squashfs/page_actor.c
index 9b7b1b6a7892..520d323a99ce 100644
--- a/fs/squashfs/page_actor.c
+++ b/fs/squashfs/page_actor.c
@@ -1,9 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * Copyright (c) 2013
  * Phillip Lougher <phillip@squashfs.org.uk>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
  */
 
 #include <linux/kernel.h>
diff --git a/fs/squashfs/page_actor.h b/fs/squashfs/page_actor.h
index 98537eab27e2..2e3073ace009 100644
--- a/fs/squashfs/page_actor.h
+++ b/fs/squashfs/page_actor.h
@@ -1,11 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 #ifndef PAGE_ACTOR_H
 #define PAGE_ACTOR_H
 /*
  * Copyright (c) 2013
  * Phillip Lougher <phillip@squashfs.org.uk>
- *
- * This work is licensed under the terms of the GNU GPL, version 2. See
- * the COPYING file in the top-level directory.
  */
 
 #ifndef CONFIG_SQUASHFS_FILE_DIRECT
diff --git a/fs/squashfs/squashfs.h b/fs/squashfs/squashfs.h
index f89f8a74c6ce..2797763ed046 100644
--- a/fs/squashfs/squashfs.h
+++ b/fs/squashfs/squashfs.h
@@ -1,23 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * squashfs.h
  */
 
diff --git a/fs/squashfs/squashfs_fs.h b/fs/squashfs/squashfs_fs.h
index 4e6853f084d0..7187bd1a30ea 100644
--- a/fs/squashfs/squashfs_fs.h
+++ b/fs/squashfs/squashfs_fs.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef SQUASHFS_FS
 #define SQUASHFS_FS
 /*
@@ -6,20 +7,6 @@
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * squashfs_fs.h
  */
 
diff --git a/fs/squashfs/squashfs_fs_i.h b/fs/squashfs/squashfs_fs_i.h
index d09fcd6fb85d..2c82d6f2a456 100644
--- a/fs/squashfs/squashfs_fs_i.h
+++ b/fs/squashfs/squashfs_fs_i.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef SQUASHFS_FS_I
 #define SQUASHFS_FS_I
 /*
@@ -6,20 +7,6 @@
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * squashfs_fs_i.h
  */
 
diff --git a/fs/squashfs/squashfs_fs_sb.h b/fs/squashfs/squashfs_fs_sb.h
index ef69c31947bf..34c21ffb6df3 100644
--- a/fs/squashfs/squashfs_fs_sb.h
+++ b/fs/squashfs/squashfs_fs_sb.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 #ifndef SQUASHFS_FS_SB
 #define SQUASHFS_FS_SB
 /*
@@ -6,20 +7,6 @@
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * squashfs_fs_sb.h
  */
 
diff --git a/fs/squashfs/super.c b/fs/squashfs/super.c
index 40e657386fa5..effa638d6d85 100644
--- a/fs/squashfs/super.c
+++ b/fs/squashfs/super.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * super.c
  */
 
@@ -473,18 +460,11 @@ static struct inode *squashfs_alloc_inode(struct super_block *sb)
 }
 
 
-static void squashfs_i_callback(struct rcu_head *head)
+static void squashfs_free_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(squashfs_inode_cachep, squashfs_i(inode));
 }
 
-static void squashfs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, squashfs_i_callback);
-}
-
-
 static struct file_system_type squashfs_fs_type = {
 	.owner = THIS_MODULE,
 	.name = "squashfs",
@@ -496,7 +476,7 @@ MODULE_ALIAS_FS("squashfs");
 
 static const struct super_operations squashfs_super_ops = {
 	.alloc_inode = squashfs_alloc_inode,
-	.destroy_inode = squashfs_destroy_inode,
+	.free_inode = squashfs_free_inode,
 	.statfs = squashfs_statfs,
 	.put_super = squashfs_put_super,
 	.remount_fs = squashfs_remount
diff --git a/fs/squashfs/symlink.c b/fs/squashfs/symlink.c
index befeba0fa70a..1430613183e6 100644
--- a/fs/squashfs/symlink.c
+++ b/fs/squashfs/symlink.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * symlink.c
  */
 
diff --git a/fs/squashfs/xattr.c b/fs/squashfs/xattr.c
index 1548b3784548..e1e3f3dd5a06 100644
--- a/fs/squashfs/xattr.c
+++ b/fs/squashfs/xattr.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2010
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * xattr.c
  */
 
diff --git a/fs/squashfs/xattr.h b/fs/squashfs/xattr.h
index afe70f815e3d..184129afd456 100644
--- a/fs/squashfs/xattr.h
+++ b/fs/squashfs/xattr.h
@@ -1,23 +1,10 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2010
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * xattr.h
  */
 
diff --git a/fs/squashfs/xattr_id.c b/fs/squashfs/xattr_id.c
index c89607d690c4..d99e08464554 100644
--- a/fs/squashfs/xattr_id.c
+++ b/fs/squashfs/xattr_id.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2010
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * xattr_id.c
  */
 
diff --git a/fs/squashfs/xz_wrapper.c b/fs/squashfs/xz_wrapper.c
index 6bfaef73d065..4b2f2051a6dc 100644
--- a/fs/squashfs/xz_wrapper.c
+++ b/fs/squashfs/xz_wrapper.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * xz_wrapper.c
  */
 
diff --git a/fs/squashfs/zlib_wrapper.c b/fs/squashfs/zlib_wrapper.c
index 2ec24d128bce..f2226afa1625 100644
--- a/fs/squashfs/zlib_wrapper.c
+++ b/fs/squashfs/zlib_wrapper.c
@@ -1,23 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009
  * Phillip Lougher <phillip@squashfs.org.uk>
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this program; if not, write to the Free Software
- * Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
- *
  * zlib_wrapper.c
  */
 
diff --git a/fs/squashfs/zstd_wrapper.c b/fs/squashfs/zstd_wrapper.c
index eeaabf881159..b448c2a1d0ed 100644
--- a/fs/squashfs/zstd_wrapper.c
+++ b/fs/squashfs/zstd_wrapper.c
@@ -1,19 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
 /*
  * Squashfs - a compressed read only filesystem for Linux
  *
  * Copyright (c) 2016-present, Facebook, Inc.
  * All rights reserved.
  *
- * This program is free software; you can redistribute it and/or
- * modify it under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2,
- * or (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
  * zstd_wrapper.c
  */
 
diff --git a/fs/stack.c b/fs/stack.c
index a54e33ed10f1..4ef2c056269d 100644
--- a/fs/stack.c
+++ b/fs/stack.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 #include <linux/export.h>
 #include <linux/fs.h>
 #include <linux/fs_stack.h>
@@ -21,11 +22,10 @@ void fsstack_copy_inode_size(struct inode *dst, struct inode *src)
 	i_size = i_size_read(src);
 
 	/*
-	 * But if CONFIG_LBDAF (on 32-bit), we ought to make an effort to
-	 * keep the two halves of i_blocks in sync despite SMP or PREEMPT -
-	 * though stat's generic_fillattr() doesn't bother, and we won't be
-	 * applying quotas (where i_blocks does become important) at the
-	 * upper level.
+	 * But on 32-bit, we ought to make an effort to keep the two halves of
+	 * i_blocks in sync despite SMP or PREEMPT - though stat's
+	 * generic_fillattr() doesn't bother, and we won't be applying quotas
+	 * (where i_blocks does become important) at the upper level.
 	 *
 	 * We don't actually know what locking is used at the lower level;
 	 * but if it's a filesystem that supports quotas, it will be using
@@ -44,9 +44,9 @@ void fsstack_copy_inode_size(struct inode *dst, struct inode *src)
 	 * include/linux/fs.h).  We don't necessarily hold i_mutex when this
 	 * is called, so take i_lock for that case.
 	 *
-	 * And if CONFIG_LBDAF (on 32-bit), continue our effort to keep the
-	 * two halves of i_blocks in sync despite SMP or PREEMPT: use i_lock
-	 * for that case too, and do both at once by combining the tests.
+	 * And if on 32-bit, continue our effort to keep the two halves of
+	 * i_blocks in sync despite SMP or PREEMPT: use i_lock  for that case
+	 * too, and do both at once by combining the tests.
 	 *
 	 * There is none of this locking overhead in the 64-bit case.
 	 */
diff --git a/fs/stat.c b/fs/stat.c
index adbfcd86c81b..c38e4c2e1221 100644
--- a/fs/stat.c
+++ b/fs/stat.c
@@ -45,11 +45,6 @@ void generic_fillattr(struct inode *inode, struct kstat *stat)
 	stat->ctime = inode->i_ctime;
 	stat->blksize = i_blocksize(inode);
 	stat->blocks = inode->i_blocks;
-
-	if (IS_NOATIME(inode))
-		stat->result_mask &= ~STATX_ATIME;
-	if (IS_AUTOMOUNT(inode))
-		stat->attributes |= STATX_ATTR_AUTOMOUNT;
 }
 EXPORT_SYMBOL(generic_fillattr);
 
@@ -75,6 +70,13 @@ int vfs_getattr_nosec(const struct path *path, struct kstat *stat,
 	stat->result_mask |= STATX_BASIC_STATS;
 	request_mask &= STATX_ALL;
 	query_flags &= KSTAT_QUERY_FLAGS;
+
+	/* allow the fs to override these if it really wants to */
+	if (IS_NOATIME(inode))
+		stat->result_mask &= ~STATX_ATIME;
+	if (IS_AUTOMOUNT(inode))
+		stat->attributes |= STATX_ATTR_AUTOMOUNT;
+
 	if (inode->i_op->getattr)
 		return inode->i_op->getattr(path, stat, request_mask,
 					    query_flags);
diff --git a/fs/statfs.c b/fs/statfs.c
index f0216629621d..eea7af6f2f22 100644
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -67,6 +67,20 @@ static int statfs_by_dentry(struct dentry *dentry, struct kstatfs *buf)
 	return retval;
 }
 
+int vfs_get_fsid(struct dentry *dentry, __kernel_fsid_t *fsid)
+{
+	struct kstatfs st;
+	int error;
+
+	error = statfs_by_dentry(dentry, &st);
+	if (error)
+		return error;
+
+	*fsid = st.f_fsid;
+	return 0;
+}
+EXPORT_SYMBOL(vfs_get_fsid);
+
 int vfs_statfs(const struct path *path, struct kstatfs *buf)
 {
 	int error;
diff --git a/fs/super.c b/fs/super.c
index 48e25eba8465..2739f57515f8 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -35,6 +35,7 @@
 #include <linux/fsnotify.h>
 #include <linux/lockdep.h>
 #include <linux/user_namespace.h>
+#include <linux/fs_context.h>
 #include <uapi/linux/mount.h>
 #include "internal.h"
 
@@ -476,6 +477,94 @@ void generic_shutdown_super(struct super_block *sb)
 EXPORT_SYMBOL(generic_shutdown_super);
 
 /**
+ * sget_fc - Find or create a superblock
+ * @fc:	Filesystem context.
+ * @test: Comparison callback
+ * @set: Setup callback
+ *
+ * Find or create a superblock using the parameters stored in the filesystem
+ * context and the two callback functions.
+ *
+ * If an extant superblock is matched, then that will be returned with an
+ * elevated reference count that the caller must transfer or discard.
+ *
+ * If no match is made, a new superblock will be allocated and basic
+ * initialisation will be performed (s_type, s_fs_info and s_id will be set and
+ * the set() callback will be invoked), the superblock will be published and it
+ * will be returned in a partially constructed state with SB_BORN and SB_ACTIVE
+ * as yet unset.
+ */
+struct super_block *sget_fc(struct fs_context *fc,
+			    int (*test)(struct super_block *, struct fs_context *),
+			    int (*set)(struct super_block *, struct fs_context *))
+{
+	struct super_block *s = NULL;
+	struct super_block *old;
+	struct user_namespace *user_ns = fc->global ? &init_user_ns : fc->user_ns;
+	int err;
+
+	if (!(fc->sb_flags & SB_KERNMOUNT) &&
+	    fc->purpose != FS_CONTEXT_FOR_SUBMOUNT) {
+		/* Don't allow mounting unless the caller has CAP_SYS_ADMIN
+		 * over the namespace.
+		 */
+		if (!(fc->fs_type->fs_flags & FS_USERNS_MOUNT)) {
+			if (!capable(CAP_SYS_ADMIN))
+				return ERR_PTR(-EPERM);
+		} else {
+			if (!ns_capable(fc->user_ns, CAP_SYS_ADMIN))
+				return ERR_PTR(-EPERM);
+		}
+	}
+
+retry:
+	spin_lock(&sb_lock);
+	if (test) {
+		hlist_for_each_entry(old, &fc->fs_type->fs_supers, s_instances) {
+			if (test(old, fc))
+				goto share_extant_sb;
+		}
+	}
+	if (!s) {
+		spin_unlock(&sb_lock);
+		s = alloc_super(fc->fs_type, fc->sb_flags, user_ns);
+		if (!s)
+			return ERR_PTR(-ENOMEM);
+		goto retry;
+	}
+
+	s->s_fs_info = fc->s_fs_info;
+	err = set(s, fc);
+	if (err) {
+		s->s_fs_info = NULL;
+		spin_unlock(&sb_lock);
+		destroy_unused_super(s);
+		return ERR_PTR(err);
+	}
+	fc->s_fs_info = NULL;
+	s->s_type = fc->fs_type;
+	strlcpy(s->s_id, s->s_type->name, sizeof(s->s_id));
+	list_add_tail(&s->s_list, &super_blocks);
+	hlist_add_head(&s->s_instances, &s->s_type->fs_supers);
+	spin_unlock(&sb_lock);
+	get_filesystem(s->s_type);
+	register_shrinker_prepared(&s->s_shrink);
+	return s;
+
+share_extant_sb:
+	if (user_ns != old->s_user_ns) {
+		spin_unlock(&sb_lock);
+		destroy_unused_super(s);
+		return ERR_PTR(-EBUSY);
+	}
+	if (!grab_super(old))
+		goto retry;
+	destroy_unused_super(s);
+	return old;
+}
+EXPORT_SYMBOL(sget_fc);
+
+/**
  *	sget_userns -	find or create a superblock
  *	@type:	filesystem type superblock should belong to
  *	@test:	comparison callback
@@ -835,28 +924,35 @@ rescan:
 }
 
 /**
- *	do_remount_sb - asks filesystem to change mount options.
- *	@sb:	superblock in question
- *	@sb_flags: revised superblock flags
- *	@data:	the rest of options
- *      @force: whether or not to force the change
+ * reconfigure_super - asks filesystem to change superblock parameters
+ * @fc: The superblock and configuration
  *
- *	Alters the mount options of a mounted file system.
+ * Alters the configuration parameters of a live superblock.
  */
-int do_remount_sb(struct super_block *sb, int sb_flags, void *data, int force)
+int reconfigure_super(struct fs_context *fc)
 {
+	struct super_block *sb = fc->root->d_sb;
 	int retval;
-	int remount_ro;
+	bool remount_ro = false;
+	bool force = fc->sb_flags & SB_FORCE;
 
+	if (fc->sb_flags_mask & ~MS_RMT_MASK)
+		return -EINVAL;
 	if (sb->s_writers.frozen != SB_UNFROZEN)
 		return -EBUSY;
 
+	retval = security_sb_remount(sb, fc->security);
+	if (retval)
+		return retval;
+
+	if (fc->sb_flags_mask & SB_RDONLY) {
 #ifdef CONFIG_BLOCK
-	if (!(sb_flags & SB_RDONLY) && bdev_read_only(sb->s_bdev))
-		return -EACCES;
+		if (!(fc->sb_flags & SB_RDONLY) && bdev_read_only(sb->s_bdev))
+			return -EACCES;
 #endif
 
-	remount_ro = (sb_flags & SB_RDONLY) && !sb_rdonly(sb);
+		remount_ro = (fc->sb_flags & SB_RDONLY) && !sb_rdonly(sb);
+	}
 
 	if (remount_ro) {
 		if (!hlist_empty(&sb->s_pins)) {
@@ -867,13 +963,14 @@ int do_remount_sb(struct super_block *sb, int sb_flags, void *data, int force)
 				return 0;
 			if (sb->s_writers.frozen != SB_UNFROZEN)
 				return -EBUSY;
-			remount_ro = (sb_flags & SB_RDONLY) && !sb_rdonly(sb);
+			remount_ro = !sb_rdonly(sb);
 		}
 	}
 	shrink_dcache_sb(sb);
 
-	/* If we are remounting RDONLY and current sb is read/write,
-	   make sure there are no rw files opened */
+	/* If we are reconfiguring to RDONLY and current sb is read/write,
+	 * make sure there are no files open for writing.
+	 */
 	if (remount_ro) {
 		if (force) {
 			sb->s_readonly_remount = 1;
@@ -885,8 +982,8 @@ int do_remount_sb(struct super_block *sb, int sb_flags, void *data, int force)
 		}
 	}
 
-	if (sb->s_op->remount_fs) {
-		retval = sb->s_op->remount_fs(sb, &sb_flags, data);
+	if (fc->ops->reconfigure) {
+		retval = fc->ops->reconfigure(fc);
 		if (retval) {
 			if (!force)
 				goto cancel_readonly;
@@ -895,7 +992,9 @@ int do_remount_sb(struct super_block *sb, int sb_flags, void *data, int force)
 			     sb->s_type->name, retval);
 		}
 	}
-	sb->s_flags = (sb->s_flags & ~MS_RMT_MASK) | (sb_flags & MS_RMT_MASK);
+
+	WRITE_ONCE(sb->s_flags, ((sb->s_flags & ~fc->sb_flags_mask) |
+				 (fc->sb_flags & fc->sb_flags_mask)));
 	/* Needs to be ordered wrt mnt_is_readonly() */
 	smp_wmb();
 	sb->s_readonly_remount = 0;
@@ -922,10 +1021,15 @@ static void do_emergency_remount_callback(struct super_block *sb)
 	down_write(&sb->s_umount);
 	if (sb->s_root && sb->s_bdev && (sb->s_flags & SB_BORN) &&
 	    !sb_rdonly(sb)) {
-		/*
-		 * What lock protects sb->s_flags??
-		 */
-		do_remount_sb(sb, SB_RDONLY, NULL, 1);
+		struct fs_context *fc;
+
+		fc = fs_context_for_reconfigure(sb->s_root,
+					SB_RDONLY | SB_FORCE, SB_RDONLY);
+		if (!IS_ERR(fc)) {
+			if (parse_monolithic_mount_data(fc, NULL) == 0)
+				(void)reconfigure_super(fc);
+			put_fs_context(fc);
+		}
 	}
 	up_write(&sb->s_umount);
 }
@@ -1087,6 +1191,89 @@ struct dentry *mount_ns(struct file_system_type *fs_type,
 
 EXPORT_SYMBOL(mount_ns);
 
+int set_anon_super_fc(struct super_block *sb, struct fs_context *fc)
+{
+	return set_anon_super(sb, NULL);
+}
+EXPORT_SYMBOL(set_anon_super_fc);
+
+static int test_keyed_super(struct super_block *sb, struct fs_context *fc)
+{
+	return sb->s_fs_info == fc->s_fs_info;
+}
+
+static int test_single_super(struct super_block *s, struct fs_context *fc)
+{
+	return 1;
+}
+
+/**
+ * vfs_get_super - Get a superblock with a search key set in s_fs_info.
+ * @fc: The filesystem context holding the parameters
+ * @keying: How to distinguish superblocks
+ * @fill_super: Helper to initialise a new superblock
+ *
+ * Search for a superblock and create a new one if not found.  The search
+ * criterion is controlled by @keying.  If the search fails, a new superblock
+ * is created and @fill_super() is called to initialise it.
+ *
+ * @keying can take one of a number of values:
+ *
+ * (1) vfs_get_single_super - Only one superblock of this type may exist on the
+ *     system.  This is typically used for special system filesystems.
+ *
+ * (2) vfs_get_keyed_super - Multiple superblocks may exist, but they must have
+ *     distinct keys (where the key is in s_fs_info).  Searching for the same
+ *     key again will turn up the superblock for that key.
+ *
+ * (3) vfs_get_independent_super - Multiple superblocks may exist and are
+ *     unkeyed.  Each call will get a new superblock.
+ *
+ * A permissions check is made by sget_fc() unless we're getting a superblock
+ * for a kernel-internal mount or a submount.
+ */
+int vfs_get_super(struct fs_context *fc,
+		  enum vfs_get_super_keying keying,
+		  int (*fill_super)(struct super_block *sb,
+				    struct fs_context *fc))
+{
+	int (*test)(struct super_block *, struct fs_context *);
+	struct super_block *sb;
+
+	switch (keying) {
+	case vfs_get_single_super:
+		test = test_single_super;
+		break;
+	case vfs_get_keyed_super:
+		test = test_keyed_super;
+		break;
+	case vfs_get_independent_super:
+		test = NULL;
+		break;
+	default:
+		BUG();
+	}
+
+	sb = sget_fc(fc, test, set_anon_super_fc);
+	if (IS_ERR(sb))
+		return PTR_ERR(sb);
+
+	if (!sb->s_root) {
+		int err = fill_super(sb, fc);
+		if (err) {
+			deactivate_locked_super(sb);
+			return err;
+		}
+
+		sb->s_flags |= SB_ACTIVE;
+	}
+
+	BUG_ON(fc->root);
+	fc->root = dget(sb->s_root);
+	return 0;
+}
+EXPORT_SYMBOL(vfs_get_super);
+
 #ifdef CONFIG_BLOCK
 static int set_bdev_super(struct super_block *s, void *data)
 {
@@ -1212,6 +1399,31 @@ struct dentry *mount_nodev(struct file_system_type *fs_type,
 }
 EXPORT_SYMBOL(mount_nodev);
 
+static int reconfigure_single(struct super_block *s,
+			      int flags, void *data)
+{
+	struct fs_context *fc;
+	int ret;
+
+	/* The caller really need to be passing fc down into mount_single(),
+	 * then a chunk of this can be removed.  [Bollocks -- AV]
+	 * Better yet, reconfiguration shouldn't happen, but rather the second
+	 * mount should be rejected if the parameters are not compatible.
+	 */
+	fc = fs_context_for_reconfigure(s->s_root, flags, MS_RMT_MASK);
+	if (IS_ERR(fc))
+		return PTR_ERR(fc);
+
+	ret = parse_monolithic_mount_data(fc, data);
+	if (ret < 0)
+		goto out;
+
+	ret = reconfigure_super(fc);
+out:
+	put_fs_context(fc);
+	return ret;
+}
+
 static int compare_single(struct super_block *s, void *p)
 {
 	return 1;
@@ -1229,41 +1441,59 @@ struct dentry *mount_single(struct file_system_type *fs_type,
 		return ERR_CAST(s);
 	if (!s->s_root) {
 		error = fill_super(s, data, flags & SB_SILENT ? 1 : 0);
-		if (error) {
-			deactivate_locked_super(s);
-			return ERR_PTR(error);
-		}
-		s->s_flags |= SB_ACTIVE;
+		if (!error)
+			s->s_flags |= SB_ACTIVE;
 	} else {
-		do_remount_sb(s, flags, data, 0);
+		error = reconfigure_single(s, flags, data);
+	}
+	if (unlikely(error)) {
+		deactivate_locked_super(s);
+		return ERR_PTR(error);
 	}
 	return dget(s->s_root);
 }
 EXPORT_SYMBOL(mount_single);
 
-struct dentry *
-mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
+/**
+ * vfs_get_tree - Get the mountable root
+ * @fc: The superblock configuration context.
+ *
+ * The filesystem is invoked to get or create a superblock which can then later
+ * be used for mounting.  The filesystem places a pointer to the root to be
+ * used for mounting in @fc->root.
+ */
+int vfs_get_tree(struct fs_context *fc)
 {
-	struct dentry *root;
 	struct super_block *sb;
-	int error = -ENOMEM;
-	void *sec_opts = NULL;
+	int error;
 
-	if (data && !(type->fs_flags & FS_BINARY_MOUNTDATA)) {
-		error = security_sb_eat_lsm_opts(data, &sec_opts);
-		if (error)
-			return ERR_PTR(error);
-	}
+	if (fc->root)
+		return -EBUSY;
 
-	root = type->mount(type, flags, name, data);
-	if (IS_ERR(root)) {
-		error = PTR_ERR(root);
-		goto out_free_secdata;
+	/* Get the mountable root in fc->root, with a ref on the root and a ref
+	 * on the superblock.
+	 */
+	error = fc->ops->get_tree(fc);
+	if (error < 0)
+		return error;
+
+	if (!fc->root) {
+		pr_err("Filesystem %s get_tree() didn't set fc->root\n",
+		       fc->fs_type->name);
+		/* We don't know what the locking state of the superblock is -
+		 * if there is a superblock.
+		 */
+		BUG();
 	}
-	sb = root->d_sb;
-	BUG_ON(!sb);
+
+	sb = fc->root->d_sb;
 	WARN_ON(!sb->s_bdi);
 
+	if (fc->subtype && !sb->s_subtype) {
+		sb->s_subtype = fc->subtype;
+		fc->subtype = NULL;
+	}
+
 	/*
 	 * Write barrier is for super_cache_count(). We place it before setting
 	 * SB_BORN as the data dependency between the two functions is the
@@ -1273,14 +1503,10 @@ mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
 	smp_wmb();
 	sb->s_flags |= SB_BORN;
 
-	error = security_sb_set_mnt_opts(sb, sec_opts, 0, NULL);
-	if (error)
-		goto out_sb;
-
-	if (!(flags & (MS_KERNMOUNT|MS_SUBMOUNT))) {
-		error = security_sb_kern_mount(sb);
-		if (error)
-			goto out_sb;
+	error = security_sb_set_mnt_opts(sb, fc->security, 0, NULL);
+	if (unlikely(error)) {
+		fc_drop_locked(fc);
+		return error;
 	}
 
 	/*
@@ -1290,18 +1516,11 @@ mount_fs(struct file_system_type *type, int flags, const char *name, void *data)
 	 * violate this rule.
 	 */
 	WARN((sb->s_maxbytes < 0), "%s set sb->s_maxbytes to "
-		"negative value (%lld)\n", type->name, sb->s_maxbytes);
+		"negative value (%lld)\n", fc->fs_type->name, sb->s_maxbytes);
 
-	up_write(&sb->s_umount);
-	security_free_mnt_opts(&sec_opts);
-	return root;
-out_sb:
-	dput(root);
-	deactivate_locked_super(sb);
-out_free_secdata:
-	security_free_mnt_opts(&sec_opts);
-	return ERR_PTR(error);
+	return 0;
 }
+EXPORT_SYMBOL(vfs_get_tree);
 
 /*
  * Setup private BDI for given superblock. It gets automatically cleaned up
diff --git a/fs/sync.c b/fs/sync.c
index b54e0541ad89..4d1ff010bc5a 100644
--- a/fs/sync.c
+++ b/fs/sync.c
@@ -234,58 +234,10 @@ SYSCALL_DEFINE1(fdatasync, unsigned int, fd)
 	return do_fsync(fd, 1);
 }
 
-/*
- * sys_sync_file_range() permits finely controlled syncing over a segment of
- * a file in the range offset .. (offset+nbytes-1) inclusive.  If nbytes is
- * zero then sys_sync_file_range() will operate from offset out to EOF.
- *
- * The flag bits are:
- *
- * SYNC_FILE_RANGE_WAIT_BEFORE: wait upon writeout of all pages in the range
- * before performing the write.
- *
- * SYNC_FILE_RANGE_WRITE: initiate writeout of all those dirty pages in the
- * range which are not presently under writeback. Note that this may block for
- * significant periods due to exhaustion of disk request structures.
- *
- * SYNC_FILE_RANGE_WAIT_AFTER: wait upon writeout of all pages in the range
- * after performing the write.
- *
- * Useful combinations of the flag bits are:
- *
- * SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE: ensures that all pages
- * in the range which were dirty on entry to sys_sync_file_range() are placed
- * under writeout.  This is a start-write-for-data-integrity operation.
- *
- * SYNC_FILE_RANGE_WRITE: start writeout of all dirty pages in the range which
- * are not presently under writeout.  This is an asynchronous flush-to-disk
- * operation.  Not suitable for data integrity operations.
- *
- * SYNC_FILE_RANGE_WAIT_BEFORE (or SYNC_FILE_RANGE_WAIT_AFTER): wait for
- * completion of writeout of all pages in the range.  This will be used after an
- * earlier SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE operation to wait
- * for that operation to complete and to return the result.
- *
- * SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE|SYNC_FILE_RANGE_WAIT_AFTER:
- * a traditional sync() operation.  This is a write-for-data-integrity operation
- * which will ensure that all pages in the range which were dirty on entry to
- * sys_sync_file_range() are committed to disk.
- *
- *
- * SYNC_FILE_RANGE_WAIT_BEFORE and SYNC_FILE_RANGE_WAIT_AFTER will detect any
- * I/O errors or ENOSPC conditions and will return those to the caller, after
- * clearing the EIO and ENOSPC flags in the address_space.
- *
- * It should be noted that none of these operations write out the file's
- * metadata.  So unless the application is strictly performing overwrites of
- * already-instantiated disk blocks, there are no guarantees here that the data
- * will be available after a crash.
- */
-int ksys_sync_file_range(int fd, loff_t offset, loff_t nbytes,
-			 unsigned int flags)
+int sync_file_range(struct file *file, loff_t offset, loff_t nbytes,
+		    unsigned int flags)
 {
 	int ret;
-	struct fd f;
 	struct address_space *mapping;
 	loff_t endbyte;			/* inclusive */
 	umode_t i_mode;
@@ -325,41 +277,105 @@ int ksys_sync_file_range(int fd, loff_t offset, loff_t nbytes,
 	else
 		endbyte--;		/* inclusive */
 
-	ret = -EBADF;
-	f = fdget(fd);
-	if (!f.file)
-		goto out;
-
-	i_mode = file_inode(f.file)->i_mode;
+	i_mode = file_inode(file)->i_mode;
 	ret = -ESPIPE;
 	if (!S_ISREG(i_mode) && !S_ISBLK(i_mode) && !S_ISDIR(i_mode) &&
 			!S_ISLNK(i_mode))
-		goto out_put;
+		goto out;
 
-	mapping = f.file->f_mapping;
+	mapping = file->f_mapping;
 	ret = 0;
 	if (flags & SYNC_FILE_RANGE_WAIT_BEFORE) {
-		ret = file_fdatawait_range(f.file, offset, endbyte);
+		ret = file_fdatawait_range(file, offset, endbyte);
 		if (ret < 0)
-			goto out_put;
+			goto out;
 	}
 
 	if (flags & SYNC_FILE_RANGE_WRITE) {
+		int sync_mode = WB_SYNC_NONE;
+
+		if ((flags & SYNC_FILE_RANGE_WRITE_AND_WAIT) ==
+			     SYNC_FILE_RANGE_WRITE_AND_WAIT)
+			sync_mode = WB_SYNC_ALL;
+
 		ret = __filemap_fdatawrite_range(mapping, offset, endbyte,
-						 WB_SYNC_NONE);
+						 sync_mode);
 		if (ret < 0)
-			goto out_put;
+			goto out;
 	}
 
 	if (flags & SYNC_FILE_RANGE_WAIT_AFTER)
-		ret = file_fdatawait_range(f.file, offset, endbyte);
+		ret = file_fdatawait_range(file, offset, endbyte);
 
-out_put:
-	fdput(f);
 out:
 	return ret;
 }
 
+/*
+ * ksys_sync_file_range() permits finely controlled syncing over a segment of
+ * a file in the range offset .. (offset+nbytes-1) inclusive.  If nbytes is
+ * zero then ksys_sync_file_range() will operate from offset out to EOF.
+ *
+ * The flag bits are:
+ *
+ * SYNC_FILE_RANGE_WAIT_BEFORE: wait upon writeout of all pages in the range
+ * before performing the write.
+ *
+ * SYNC_FILE_RANGE_WRITE: initiate writeout of all those dirty pages in the
+ * range which are not presently under writeback. Note that this may block for
+ * significant periods due to exhaustion of disk request structures.
+ *
+ * SYNC_FILE_RANGE_WAIT_AFTER: wait upon writeout of all pages in the range
+ * after performing the write.
+ *
+ * Useful combinations of the flag bits are:
+ *
+ * SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE: ensures that all pages
+ * in the range which were dirty on entry to ksys_sync_file_range() are placed
+ * under writeout.  This is a start-write-for-data-integrity operation.
+ *
+ * SYNC_FILE_RANGE_WRITE: start writeout of all dirty pages in the range which
+ * are not presently under writeout.  This is an asynchronous flush-to-disk
+ * operation.  Not suitable for data integrity operations.
+ *
+ * SYNC_FILE_RANGE_WAIT_BEFORE (or SYNC_FILE_RANGE_WAIT_AFTER): wait for
+ * completion of writeout of all pages in the range.  This will be used after an
+ * earlier SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE operation to wait
+ * for that operation to complete and to return the result.
+ *
+ * SYNC_FILE_RANGE_WAIT_BEFORE|SYNC_FILE_RANGE_WRITE|SYNC_FILE_RANGE_WAIT_AFTER
+ * (a.k.a. SYNC_FILE_RANGE_WRITE_AND_WAIT):
+ * a traditional sync() operation.  This is a write-for-data-integrity operation
+ * which will ensure that all pages in the range which were dirty on entry to
+ * ksys_sync_file_range() are written to disk.  It should be noted that disk
+ * caches are not flushed by this call, so there are no guarantees here that the
+ * data will be available on disk after a crash.
+ *
+ *
+ * SYNC_FILE_RANGE_WAIT_BEFORE and SYNC_FILE_RANGE_WAIT_AFTER will detect any
+ * I/O errors or ENOSPC conditions and will return those to the caller, after
+ * clearing the EIO and ENOSPC flags in the address_space.
+ *
+ * It should be noted that none of these operations write out the file's
+ * metadata.  So unless the application is strictly performing overwrites of
+ * already-instantiated disk blocks, there are no guarantees here that the data
+ * will be available after a crash.
+ */
+int ksys_sync_file_range(int fd, loff_t offset, loff_t nbytes,
+			 unsigned int flags)
+{
+	int ret;
+	struct fd f;
+
+	ret = -EBADF;
+	f = fdget(fd);
+	if (f.file)
+		ret = sync_file_range(f.file, offset, nbytes, flags);
+
+	fdput(f);
+	return ret;
+}
+
 SYSCALL_DEFINE4(sync_file_range, int, fd, loff_t, offset, loff_t, nbytes,
 				unsigned int, flags)
 {
diff --git a/fs/sysfs/Kconfig b/fs/sysfs/Kconfig
index b2756014508c..b0fe1cce33a0 100644
--- a/fs/sysfs/Kconfig
+++ b/fs/sysfs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config SYSFS
 	bool "sysfs file system support" if EXPERT
 	default y
diff --git a/fs/sysfs/Makefile b/fs/sysfs/Makefile
index 6eff6e1205a5..0906b9e522fe 100644
--- a/fs/sysfs/Makefile
+++ b/fs/sysfs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the sysfs virtual filesystem
 #
diff --git a/fs/sysfs/file.c b/fs/sysfs/file.c
index 51398457fe00..130fc6fbcc03 100644
--- a/fs/sysfs/file.c
+++ b/fs/sysfs/file.c
@@ -17,7 +17,6 @@
 #include <linux/seq_file.h>
 
 #include "sysfs.h"
-#include "../kernfs/kernfs-internal.h"
 
 /*
  * Determine ktype->sysfs_ops for the given kernfs_node.  This function
@@ -497,6 +496,7 @@ bool sysfs_remove_file_self(struct kobject *kobj, const struct attribute *attr)
 void sysfs_remove_files(struct kobject *kobj, const struct attribute * const *ptr)
 {
 	int i;
+
 	for (i = 0; ptr[i]; i++)
 		sysfs_remove_file(kobj, ptr[i]);
 }
diff --git a/fs/sysfs/group.c b/fs/sysfs/group.c
index 57038604d4a8..d41c21fef138 100644
--- a/fs/sysfs/group.c
+++ b/fs/sysfs/group.c
@@ -175,6 +175,26 @@ int sysfs_create_group(struct kobject *kobj,
 }
 EXPORT_SYMBOL_GPL(sysfs_create_group);
 
+static int internal_create_groups(struct kobject *kobj, int update,
+				  const struct attribute_group **groups)
+{
+	int error = 0;
+	int i;
+
+	if (!groups)
+		return 0;
+
+	for (i = 0; groups[i]; i++) {
+		error = internal_create_group(kobj, update, groups[i]);
+		if (error) {
+			while (--i >= 0)
+				sysfs_remove_group(kobj, groups[i]);
+			break;
+		}
+	}
+	return error;
+}
+
 /**
  * sysfs_create_groups - given a directory kobject, create a bunch of attribute groups
  * @kobj:	The kobject to create the group on
@@ -191,25 +211,29 @@ EXPORT_SYMBOL_GPL(sysfs_create_group);
 int sysfs_create_groups(struct kobject *kobj,
 			const struct attribute_group **groups)
 {
-	int error = 0;
-	int i;
-
-	if (!groups)
-		return 0;
-
-	for (i = 0; groups[i]; i++) {
-		error = sysfs_create_group(kobj, groups[i]);
-		if (error) {
-			while (--i >= 0)
-				sysfs_remove_group(kobj, groups[i]);
-			break;
-		}
-	}
-	return error;
+	return internal_create_groups(kobj, 0, groups);
 }
 EXPORT_SYMBOL_GPL(sysfs_create_groups);
 
 /**
+ * sysfs_update_groups - given a directory kobject, create a bunch of attribute groups
+ * @kobj:	The kobject to update the group on
+ * @groups:	The attribute groups to update, NULL terminated
+ *
+ * This function update a bunch of attribute groups.  If an error occurs when
+ * updating a group, all previously updated groups will be removed together
+ * with already existing (not updated) attributes.
+ *
+ * Returns 0 on success or error code from sysfs_update_group on failure.
+ */
+int sysfs_update_groups(struct kobject *kobj,
+			const struct attribute_group **groups)
+{
+	return internal_create_groups(kobj, 1, groups);
+}
+EXPORT_SYMBOL_GPL(sysfs_update_groups);
+
+/**
  * sysfs_update_group - given a directory kobject, update an attribute group
  * @kobj:	The kobject to update the group on
  * @grp:	The attribute group to update
diff --git a/fs/sysfs/mount.c b/fs/sysfs/mount.c
index 92682fcc41f6..1b56686ab178 100644
--- a/fs/sysfs/mount.c
+++ b/fs/sysfs/mount.c
@@ -13,34 +13,71 @@
 #include <linux/magic.h>
 #include <linux/mount.h>
 #include <linux/init.h>
+#include <linux/slab.h>
 #include <linux/user_namespace.h>
+#include <linux/fs_context.h>
+#include <net/net_namespace.h>
 
 #include "sysfs.h"
 
 static struct kernfs_root *sysfs_root;
 struct kernfs_node *sysfs_root_kn;
 
-static struct dentry *sysfs_mount(struct file_system_type *fs_type,
-	int flags, const char *dev_name, void *data)
+static int sysfs_get_tree(struct fs_context *fc)
 {
-	struct dentry *root;
-	void *ns;
-	bool new_sb = false;
+	struct kernfs_fs_context *kfc = fc->fs_private;
+	int ret;
 
-	if (!(flags & SB_KERNMOUNT)) {
+	ret = kernfs_get_tree(fc);
+	if (ret)
+		return ret;
+
+	if (kfc->new_sb_created)
+		fc->root->d_sb->s_iflags |= SB_I_USERNS_VISIBLE;
+	return 0;
+}
+
+static void sysfs_fs_context_free(struct fs_context *fc)
+{
+	struct kernfs_fs_context *kfc = fc->fs_private;
+
+	if (kfc->ns_tag)
+		kobj_ns_drop(KOBJ_NS_TYPE_NET, kfc->ns_tag);
+	kernfs_free_fs_context(fc);
+	kfree(kfc);
+}
+
+static const struct fs_context_operations sysfs_fs_context_ops = {
+	.free		= sysfs_fs_context_free,
+	.get_tree	= sysfs_get_tree,
+};
+
+static int sysfs_init_fs_context(struct fs_context *fc)
+{
+	struct kernfs_fs_context *kfc;
+	struct net *netns;
+
+	if (!(fc->sb_flags & SB_KERNMOUNT)) {
 		if (!kobj_ns_current_may_mount(KOBJ_NS_TYPE_NET))
-			return ERR_PTR(-EPERM);
+			return -EPERM;
 	}
 
-	ns = kobj_ns_grab_current(KOBJ_NS_TYPE_NET);
-	root = kernfs_mount_ns(fs_type, flags, sysfs_root,
-				SYSFS_MAGIC, &new_sb, ns);
-	if (!new_sb)
-		kobj_ns_drop(KOBJ_NS_TYPE_NET, ns);
-	else if (!IS_ERR(root))
-		root->d_sb->s_iflags |= SB_I_USERNS_VISIBLE;
+	kfc = kzalloc(sizeof(struct kernfs_fs_context), GFP_KERNEL);
+	if (!kfc)
+		return -ENOMEM;
 
-	return root;
+	kfc->ns_tag = netns = kobj_ns_grab_current(KOBJ_NS_TYPE_NET);
+	kfc->root = sysfs_root;
+	kfc->magic = SYSFS_MAGIC;
+	fc->fs_private = kfc;
+	fc->ops = &sysfs_fs_context_ops;
+	if (netns) {
+		if (fc->user_ns)
+			put_user_ns(fc->user_ns);
+		fc->user_ns = get_user_ns(netns->user_ns);
+	}
+	fc->global = true;
+	return 0;
 }
 
 static void sysfs_kill_sb(struct super_block *sb)
@@ -52,10 +89,10 @@ static void sysfs_kill_sb(struct super_block *sb)
 }
 
 static struct file_system_type sysfs_fs_type = {
-	.name		= "sysfs",
-	.mount		= sysfs_mount,
-	.kill_sb	= sysfs_kill_sb,
-	.fs_flags	= FS_USERNS_MOUNT,
+	.name			= "sysfs",
+	.init_fs_context	= sysfs_init_fs_context,
+	.kill_sb		= sysfs_kill_sb,
+	.fs_flags		= FS_USERNS_MOUNT,
 };
 
 int __init sysfs_init(void)
diff --git a/fs/sysv/Kconfig b/fs/sysv/Kconfig
index 33aeb4b75db1..d4edf7d9ae10 100644
--- a/fs/sysv/Kconfig
+++ b/fs/sysv/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config SYSV_FS
 	tristate "System V/Xenix/V7/Coherent file system support"
 	depends on BLOCK
diff --git a/fs/sysv/Makefile b/fs/sysv/Makefile
index 7a75e70a4b61..17d12ba04b18 100644
--- a/fs/sysv/Makefile
+++ b/fs/sysv/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux SystemV/Coherent filesystem routines.
 #
diff --git a/fs/sysv/inode.c b/fs/sysv/inode.c
index 273736f41be3..02b1d9d0c182 100644
--- a/fs/sysv/inode.c
+++ b/fs/sysv/inode.c
@@ -313,17 +313,11 @@ static struct inode *sysv_alloc_inode(struct super_block *sb)
 	return &si->vfs_inode;
 }
 
-static void sysv_i_callback(struct rcu_head *head)
+static void sysv_free_in_core_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(sysv_inode_cachep, SYSV_I(inode));
 }
 
-static void sysv_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, sysv_i_callback);
-}
-
 static void init_once(void *p)
 {
 	struct sysv_inode_info *si = (struct sysv_inode_info *)p;
@@ -333,7 +327,7 @@ static void init_once(void *p)
 
 const struct super_operations sysv_sops = {
 	.alloc_inode	= sysv_alloc_inode,
-	.destroy_inode	= sysv_destroy_inode,
+	.free_inode	= sysv_free_in_core_inode,
 	.write_inode	= sysv_write_inode,
 	.evict_inode	= sysv_evict_inode,
 	.put_super	= sysv_put_super,
diff --git a/fs/sysv/namei.c b/fs/sysv/namei.c
index 4d5d20491ffd..ea2414b385ec 100644
--- a/fs/sysv/namei.c
+++ b/fs/sysv/namei.c
@@ -28,21 +28,6 @@ static int add_nondir(struct dentry *dentry, struct inode *inode)
 	return err;
 }
 
-static int sysv_hash(const struct dentry *dentry, struct qstr *qstr)
-{
-	/* Truncate the name in place, avoids having to define a compare
-	   function. */
-	if (qstr->len > SYSV_NAMELEN) {
-		qstr->len = SYSV_NAMELEN;
-		qstr->hash = full_name_hash(dentry, qstr->name, qstr->len);
-	}
-	return 0;
-}
-
-const struct dentry_operations sysv_dentry_operations = {
-	.d_hash		= sysv_hash,
-};
-
 static struct dentry *sysv_lookup(struct inode * dir, struct dentry * dentry, unsigned int flags)
 {
 	struct inode * inode = NULL;
diff --git a/fs/sysv/super.c b/fs/sysv/super.c
index 89765ddfb738..d788b1daa7eb 100644
--- a/fs/sysv/super.c
+++ b/fs/sysv/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/sysv/inode.c
  *
@@ -312,7 +313,6 @@ static int complete_read_super(struct super_block *sb, int silent, int size)
 
 	flavour_setup[sbi->s_type](sbi, &sb->s_max_links);
 	
-	sbi->s_truncate = 1;
 	sbi->s_ndatazones = sbi->s_nzones - sbi->s_firstdatazone;
 	sbi->s_inodes_per_block = bsize >> 6;
 	sbi->s_inodes_per_block_1 = (bsize >> 6)-1;
@@ -334,8 +334,6 @@ static int complete_read_super(struct super_block *sb, int silent, int size)
 	sb->s_op = &sysv_sops;
 	if (sbi->s_forced_ro)
 		sb->s_flags |= SB_RDONLY;
-	if (sbi->s_truncate)
-		sb->s_d_op = &sysv_dentry_operations;
 	root_inode = sysv_iget(sb, SYSV_ROOT_INO);
 	if (IS_ERR(root_inode)) {
 		printk("SysV FS: get root inode failed\n");
diff --git a/fs/sysv/sysv.h b/fs/sysv/sysv.h
index e913698779c0..1cff585526b1 100644
--- a/fs/sysv/sysv.h
+++ b/fs/sysv/sysv.h
@@ -23,8 +23,6 @@ struct sysv_sb_info {
 	struct super_block *s_sb;	/* VFS superblock */
 	int	       s_type;		/* file system type: FSTYPE_{XENIX|SYSV|COH} */
 	char	       s_bytesex;	/* bytesex (le/be/pdp) */
-	char	       s_truncate;	/* if 1: names > SYSV_NAMELEN chars are truncated */
-					/* if 0: they are disallowed (ENAMETOOLONG) */
 	unsigned int   s_inodes_per_block;	/* number of inodes per block */
 	unsigned int   s_inodes_per_block_1;	/* inodes_per_block - 1 */
 	unsigned int   s_inodes_per_block_bits;	/* log2(inodes_per_block) */
@@ -166,7 +164,6 @@ extern const struct file_operations sysv_file_operations;
 extern const struct file_operations sysv_dir_operations;
 extern const struct address_space_operations sysv_aops;
 extern const struct super_operations sysv_sops;
-extern const struct dentry_operations sysv_dentry_operations;
 
 
 enum {
diff --git a/fs/timerfd.c b/fs/timerfd.c
index 803ca070d42e..6a6fc8aa1de7 100644
--- a/fs/timerfd.c
+++ b/fs/timerfd.c
@@ -560,7 +560,7 @@ SYSCALL_DEFINE2(timerfd_gettime, int, ufd, struct __kernel_itimerspec __user *,
 }
 
 #ifdef CONFIG_COMPAT_32BIT_TIME
-COMPAT_SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
+SYSCALL_DEFINE4(timerfd_settime32, int, ufd, int, flags,
 		const struct old_itimerspec32 __user *, utmr,
 		struct old_itimerspec32 __user *, otmr)
 {
@@ -577,7 +577,7 @@ COMPAT_SYSCALL_DEFINE4(timerfd_settime, int, ufd, int, flags,
 	return ret;
 }
 
-COMPAT_SYSCALL_DEFINE2(timerfd_gettime, int, ufd,
+SYSCALL_DEFINE2(timerfd_gettime32, int, ufd,
 		struct old_itimerspec32 __user *, otmr)
 {
 	struct itimerspec64 kotmr;
diff --git a/fs/tracefs/Makefile b/fs/tracefs/Makefile
index 82fa35b656c4..7c35a282b484 100644
--- a/fs/tracefs/Makefile
+++ b/fs/tracefs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 tracefs-objs	:= inode.o
 
 obj-$(CONFIG_TRACING)	+= tracefs.o
diff --git a/fs/tracefs/inode.c b/fs/tracefs/inode.c
index 7098c49f3693..eeeae0475da9 100644
--- a/fs/tracefs/inode.c
+++ b/fs/tracefs/inode.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  inode.c - part of tracefs, a pseudo file system for activating tracing
  *
@@ -5,12 +6,7 @@
  *
  *  Copyright (C) 2014 Red Hat Inc, author: Steven Rostedt <srostedt@redhat.com>
  *
- *	This program is free software; you can redistribute it and/or
- *	modify it under the terms of the GNU General Public License version
- *	2 as published by the Free Software Foundation.
- *
  * tracefs is the file system that is used by the tracing infrastructure.
- *
  */
 
 #include <linux/module.h>
@@ -509,9 +505,12 @@ static int __tracefs_remove(struct dentry *dentry, struct dentry *parent)
 			switch (dentry->d_inode->i_mode & S_IFMT) {
 			case S_IFDIR:
 				ret = simple_rmdir(parent->d_inode, dentry);
+				if (!ret)
+					fsnotify_rmdir(parent->d_inode, dentry);
 				break;
 			default:
 				simple_unlink(parent->d_inode, dentry);
+				fsnotify_unlink(parent->d_inode, dentry);
 				break;
 			}
 			if (!ret)
diff --git a/fs/ubifs/Kconfig b/fs/ubifs/Kconfig
index bc1e082d921d..69932bcfa920 100644
--- a/fs/ubifs/Kconfig
+++ b/fs/ubifs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config UBIFS_FS
 	tristate "UBIFS file system support"
 	select CRC16
@@ -5,9 +6,12 @@ config UBIFS_FS
 	select CRYPTO if UBIFS_FS_ADVANCED_COMPR
 	select CRYPTO if UBIFS_FS_LZO
 	select CRYPTO if UBIFS_FS_ZLIB
+	select CRYPTO if UBIFS_FS_ZSTD
 	select CRYPTO_LZO if UBIFS_FS_LZO
 	select CRYPTO_DEFLATE if UBIFS_FS_ZLIB
+	select CRYPTO_ZSTD if UBIFS_FS_ZSTD
 	select CRYPTO_HASH_INFO
+	select UBIFS_FS_XATTR if FS_ENCRYPTION
 	depends on MTD_UBI
 	help
 	  UBIFS is a file system for flash devices which works on top of UBI.
@@ -36,6 +40,14 @@ config UBIFS_FS_ZLIB
 	help
 	  Zlib compresses better than LZO but it is slower. Say 'Y' if unsure.
 
+config UBIFS_FS_ZSTD
+	bool "ZSTD compression support" if UBIFS_FS_ADVANCED_COMPR
+	depends on UBIFS_FS
+	default y
+	help
+	  ZSTD compresses is a big win in speed over Zlib and
+	  in compression ratio over LZO. Say 'Y' if unsure.
+
 config UBIFS_ATIME_SUPPORT
 	bool "Access time support"
 	default n
@@ -60,17 +72,6 @@ config UBIFS_FS_XATTR
 
 	  If unsure, say Y.
 
-config UBIFS_FS_ENCRYPTION
-	bool "UBIFS Encryption"
-	depends on UBIFS_FS_XATTR && BLOCK
-	select FS_ENCRYPTION
-	default n
-	help
-	  Enable encryption of UBIFS files and directories. This
-	  feature is similar to ecryptfs, but it is more memory
-	  efficient since it avoids caching the encrypted and
-	  decrypted pages in the page cache.
-
 config UBIFS_FS_SECURITY
 	bool "UBIFS Security Labels"
 	depends on UBIFS_FS_XATTR
@@ -86,8 +87,9 @@ config UBIFS_FS_SECURITY
 
 config UBIFS_FS_AUTHENTICATION
 	bool "UBIFS authentication support"
-	depends on KEYS
+	select KEYS
 	select CRYPTO_HMAC
+	select SYSTEM_DATA_VERIFICATION
 	help
 	  Enable authentication support for UBIFS. This feature offers protection
 	  against offline changes for both data and metadata of the filesystem.
diff --git a/fs/ubifs/Makefile b/fs/ubifs/Makefile
index 5f838319c8d5..5c4b845754a7 100644
--- a/fs/ubifs/Makefile
+++ b/fs/ubifs/Makefile
@@ -6,6 +6,6 @@ ubifs-y += tnc.o master.o scan.o replay.o log.o commit.o gc.o orphan.o
 ubifs-y += budget.o find.o tnc_commit.o compress.o lpt.o lprops.o
 ubifs-y += recovery.o ioctl.o lpt_commit.o tnc_misc.o debug.o
 ubifs-y += misc.o
-ubifs-$(CONFIG_UBIFS_FS_ENCRYPTION) += crypto.o
+ubifs-$(CONFIG_FS_ENCRYPTION) += crypto.o
 ubifs-$(CONFIG_UBIFS_FS_XATTR) += xattr.o
 ubifs-$(CONFIG_UBIFS_FS_AUTHENTICATION) += auth.o
diff --git a/fs/ubifs/auth.c b/fs/ubifs/auth.c
index 5bf5fd08879e..d9af2de9084a 100644
--- a/fs/ubifs/auth.c
+++ b/fs/ubifs/auth.c
@@ -10,10 +10,12 @@
  */
 
 #include <linux/crypto.h>
+#include <linux/verification.h>
 #include <crypto/hash.h>
 #include <crypto/sha.h>
 #include <crypto/algapi.h>
 #include <keys/user-type.h>
+#include <keys/asymmetric-type.h>
 
 #include "ubifs.h"
 
@@ -33,7 +35,6 @@ int __ubifs_node_calc_hash(const struct ubifs_info *c, const void *node,
 	int err;
 
 	shash->tfm = c->hash_tfm;
-	shash->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
 	err = crypto_shash_digest(shash, node, le32_to_cpu(ch->len), hash);
 	if (err < 0)
@@ -56,7 +57,6 @@ static int ubifs_hash_calc_hmac(const struct ubifs_info *c, const u8 *hash,
 	int err;
 
 	shash->tfm = c->hmac_tfm;
-	shash->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
 	err = crypto_shash_digest(shash, hash, c->hash_len, hmac);
 	if (err < 0)
@@ -78,7 +78,6 @@ static int ubifs_hash_calc_hmac(const struct ubifs_info *c, const u8 *hash,
 int ubifs_prepare_auth_node(struct ubifs_info *c, void *node,
 			     struct shash_desc *inhash)
 {
-	SHASH_DESC_ON_STACK(hash_desc, c->hash_tfm);
 	struct ubifs_auth_node *auth = node;
 	u8 *hash;
 	int err;
@@ -87,13 +86,16 @@ int ubifs_prepare_auth_node(struct ubifs_info *c, void *node,
 	if (!hash)
 		return -ENOMEM;
 
-	hash_desc->tfm = c->hash_tfm;
-	hash_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
-	ubifs_shash_copy_state(c, inhash, hash_desc);
+	{
+		SHASH_DESC_ON_STACK(hash_desc, c->hash_tfm);
 
-	err = crypto_shash_final(hash_desc, hash);
-	if (err)
-		goto out;
+		hash_desc->tfm = c->hash_tfm;
+		ubifs_shash_copy_state(c, inhash, hash_desc);
+
+		err = crypto_shash_final(hash_desc, hash);
+		if (err)
+			goto out;
+	}
 
 	err = ubifs_hash_calc_hmac(c, hash, auth->hmac);
 	if (err)
@@ -123,7 +125,6 @@ static struct shash_desc *ubifs_get_desc(const struct ubifs_info *c,
 		return ERR_PTR(-ENOMEM);
 
 	desc->tfm = tfm;
-	desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
 	err = crypto_shash_init(desc);
 	if (err) {
@@ -147,24 +148,6 @@ struct shash_desc *__ubifs_hash_get_desc(const struct ubifs_info *c)
 }
 
 /**
- * __ubifs_shash_final - finalize shash
- * @c: UBIFS file-system description object
- * @desc: the descriptor
- * @out: the output hash
- *
- * Simple wrapper around crypto_shash_final(), safe to be called with
- * disabled authentication.
- */
-int __ubifs_shash_final(const struct ubifs_info *c, struct shash_desc *desc,
-			u8 *out)
-{
-	if (ubifs_authenticated(c))
-		return crypto_shash_final(desc, out);
-
-	return 0;
-}
-
-/**
  * ubifs_bad_hash - Report hash mismatches
  * @c: UBIFS file-system description object
  * @node: the node
@@ -218,6 +201,77 @@ int __ubifs_node_check_hash(const struct ubifs_info *c, const void *node,
 }
 
 /**
+ * ubifs_sb_verify_signature - verify the signature of a superblock
+ * @c: UBIFS file-system description object
+ * @sup: The superblock node
+ *
+ * To support offline signed images the superblock can be signed with a
+ * PKCS#7 signature. The signature is placed directly behind the superblock
+ * node in an ubifs_sig_node.
+ *
+ * Returns 0 when the signature can be successfully verified or a negative
+ * error code if not.
+ */
+int ubifs_sb_verify_signature(struct ubifs_info *c,
+			      const struct ubifs_sb_node *sup)
+{
+	int err;
+	struct ubifs_scan_leb *sleb;
+	struct ubifs_scan_node *snod;
+	const struct ubifs_sig_node *signode;
+
+	sleb = ubifs_scan(c, UBIFS_SB_LNUM, UBIFS_SB_NODE_SZ, c->sbuf, 0);
+	if (IS_ERR(sleb)) {
+		err = PTR_ERR(sleb);
+		return err;
+	}
+
+	if (sleb->nodes_cnt == 0) {
+		ubifs_err(c, "Unable to find signature node");
+		err = -EINVAL;
+		goto out_destroy;
+	}
+
+	snod = list_first_entry(&sleb->nodes, struct ubifs_scan_node, list);
+
+	if (snod->type != UBIFS_SIG_NODE) {
+		ubifs_err(c, "Signature node is of wrong type");
+		err = -EINVAL;
+		goto out_destroy;
+	}
+
+	signode = snod->node;
+
+	if (le32_to_cpu(signode->len) > snod->len + sizeof(struct ubifs_sig_node)) {
+		ubifs_err(c, "invalid signature len %d", le32_to_cpu(signode->len));
+		err = -EINVAL;
+		goto out_destroy;
+	}
+
+	if (le32_to_cpu(signode->type) != UBIFS_SIGNATURE_TYPE_PKCS7) {
+		ubifs_err(c, "Signature type %d is not supported\n",
+			  le32_to_cpu(signode->type));
+		err = -EINVAL;
+		goto out_destroy;
+	}
+
+	err = verify_pkcs7_signature(sup, sizeof(struct ubifs_sb_node),
+				     signode->sig, le32_to_cpu(signode->len),
+				     NULL, VERIFYING_UNSPECIFIED_SIGNATURE,
+				     NULL, NULL);
+
+	if (err)
+		ubifs_err(c, "Failed to verify signature");
+	else
+		ubifs_msg(c, "Successfully verified super block signature");
+
+out_destroy:
+	ubifs_scan_destroy(sleb);
+
+	return err;
+}
+
+/**
  * ubifs_init_authentication - initialize UBIFS authentication support
  * @c: UBIFS file-system description object
  *
@@ -364,7 +418,6 @@ static int ubifs_node_calc_hmac(const struct ubifs_info *c, const void *node,
 	ubifs_assert(c, ofs_hmac + hmac_len < len);
 
 	shash->tfm = c->hmac_tfm;
-	shash->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
 	err = crypto_shash_init(shash);
 	if (err)
@@ -483,7 +536,6 @@ int ubifs_hmac_wkm(struct ubifs_info *c, u8 *hmac)
 		return 0;
 
 	shash->tfm = c->hmac_tfm;
-	shash->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
 	err = crypto_shash_init(shash);
 	if (err)
@@ -499,3 +551,16 @@ int ubifs_hmac_wkm(struct ubifs_info *c, u8 *hmac)
 		return err;
 	return 0;
 }
+
+/*
+ * ubifs_hmac_zero - test if a HMAC is zero
+ * @c: UBIFS file-system description object
+ * @hmac: the HMAC to test
+ *
+ * This function tests if a HMAC is zero and returns true if it is
+ * and false otherwise.
+ */
+bool ubifs_hmac_zero(struct ubifs_info *c, const u8 *hmac)
+{
+	return !memchr_inv(hmac, 0, c->hmac_desc_len);
+}
diff --git a/fs/ubifs/budget.c b/fs/ubifs/budget.c
index 7ef22baf9d15..80d7301ab76d 100644
--- a/fs/ubifs/budget.c
+++ b/fs/ubifs/budget.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
diff --git a/fs/ubifs/commit.c b/fs/ubifs/commit.c
index 591f2c7a48f0..ad292c5a43a9 100644
--- a/fs/ubifs/commit.c
+++ b/fs/ubifs/commit.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
diff --git a/fs/ubifs/compress.c b/fs/ubifs/compress.c
index 565cb56d7225..3a92e6af69b2 100644
--- a/fs/ubifs/compress.c
+++ b/fs/ubifs/compress.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  * Copyright (C) 2006, 2007 University of Szeged, Hungary
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  *          Zoltan Sogor
@@ -71,6 +59,24 @@ static struct ubifs_compressor zlib_compr = {
 };
 #endif
 
+#ifdef CONFIG_UBIFS_FS_ZSTD
+static DEFINE_MUTEX(zstd_enc_mutex);
+static DEFINE_MUTEX(zstd_dec_mutex);
+
+static struct ubifs_compressor zstd_compr = {
+	.compr_type = UBIFS_COMPR_ZSTD,
+	.comp_mutex = &zstd_enc_mutex,
+	.decomp_mutex = &zstd_dec_mutex,
+	.name = "zstd",
+	.capi_name = "zstd",
+};
+#else
+static struct ubifs_compressor zstd_compr = {
+	.compr_type = UBIFS_COMPR_ZSTD,
+	.name = "zstd",
+};
+#endif
+
 /* All UBIFS compressors */
 struct ubifs_compressor *ubifs_compressors[UBIFS_COMPR_TYPES_CNT];
 
@@ -228,13 +234,19 @@ int __init ubifs_compressors_init(void)
 	if (err)
 		return err;
 
-	err = compr_init(&zlib_compr);
+	err = compr_init(&zstd_compr);
 	if (err)
 		goto out_lzo;
 
+	err = compr_init(&zlib_compr);
+	if (err)
+		goto out_zstd;
+
 	ubifs_compressors[UBIFS_COMPR_NONE] = &none_compr;
 	return 0;
 
+out_zstd:
+	compr_exit(&zstd_compr);
 out_lzo:
 	compr_exit(&lzo_compr);
 	return err;
@@ -247,4 +259,5 @@ void ubifs_compressors_exit(void)
 {
 	compr_exit(&lzo_compr);
 	compr_exit(&zlib_compr);
+	compr_exit(&zstd_compr);
 }
diff --git a/fs/ubifs/crypto.c b/fs/ubifs/crypto.c
index 4aaedf2d7f44..22be7aeb96c4 100644
--- a/fs/ubifs/crypto.c
+++ b/fs/ubifs/crypto.c
@@ -29,8 +29,8 @@ int ubifs_encrypt(const struct inode *inode, struct ubifs_data_node *dn,
 {
 	struct ubifs_info *c = inode->i_sb->s_fs_info;
 	void *p = &dn->data;
-	struct page *ret;
 	unsigned int pad_len = round_up(in_len, UBIFS_CIPHER_BLOCK_SIZE);
+	int err;
 
 	ubifs_assert(c, pad_len <= *out_len);
 	dn->compr_size = cpu_to_le16(in_len);
@@ -39,11 +39,11 @@ int ubifs_encrypt(const struct inode *inode, struct ubifs_data_node *dn,
 	if (pad_len != in_len)
 		memset(p + in_len, 0, pad_len - in_len);
 
-	ret = fscrypt_encrypt_page(inode, virt_to_page(&dn->data), pad_len,
-			offset_in_page(&dn->data), block, GFP_NOFS);
-	if (IS_ERR(ret)) {
-		ubifs_err(c, "fscrypt_encrypt_page failed: %ld", PTR_ERR(ret));
-		return PTR_ERR(ret);
+	err = fscrypt_encrypt_block_inplace(inode, virt_to_page(p), pad_len,
+					    offset_in_page(p), block, GFP_NOFS);
+	if (err) {
+		ubifs_err(c, "fscrypt_encrypt_block_inplace() failed: %d", err);
+		return err;
 	}
 	*out_len = pad_len;
 
@@ -64,10 +64,11 @@ int ubifs_decrypt(const struct inode *inode, struct ubifs_data_node *dn,
 	}
 
 	ubifs_assert(c, dlen <= UBIFS_BLOCK_SIZE);
-	err = fscrypt_decrypt_page(inode, virt_to_page(&dn->data), dlen,
-			offset_in_page(&dn->data), block);
+	err = fscrypt_decrypt_block_inplace(inode, virt_to_page(&dn->data),
+					    dlen, offset_in_page(&dn->data),
+					    block);
 	if (err) {
-		ubifs_err(c, "fscrypt_decrypt_page failed: %i", err);
+		ubifs_err(c, "fscrypt_decrypt_block_inplace() failed: %d", err);
 		return err;
 	}
 	*out_len = clen;
diff --git a/fs/ubifs/debug.c b/fs/ubifs/debug.c
index c49ff50fdceb..a5f10d79e0dd 100644
--- a/fs/ubifs/debug.c
+++ b/fs/ubifs/debug.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -1603,7 +1591,6 @@ int dbg_walk_index(struct ubifs_info *c, dbg_leaf_callback leaf_cb,
 				err = PTR_ERR(child);
 				goto out_unlock;
 			}
-			zbr->znode = child;
 		}
 
 		znode = child;
@@ -2813,115 +2800,69 @@ static const struct file_operations dfs_fops = {
  * dbg_debugfs_init_fs - initialize debugfs for UBIFS instance.
  * @c: UBIFS file-system description object
  *
- * This function creates all debugfs files for this instance of UBIFS. Returns
- * zero in case of success and a negative error code in case of failure.
+ * This function creates all debugfs files for this instance of UBIFS.
  *
  * Note, the only reason we have not merged this function with the
  * 'ubifs_debugging_init()' function is because it is better to initialize
  * debugfs interfaces at the very end of the mount process, and remove them at
  * the very beginning of the mount process.
  */
-int dbg_debugfs_init_fs(struct ubifs_info *c)
+void dbg_debugfs_init_fs(struct ubifs_info *c)
 {
-	int err, n;
+	int n;
 	const char *fname;
-	struct dentry *dent;
 	struct ubifs_debug_info *d = c->dbg;
 
-	if (!IS_ENABLED(CONFIG_DEBUG_FS))
-		return 0;
-
 	n = snprintf(d->dfs_dir_name, UBIFS_DFS_DIR_LEN + 1, UBIFS_DFS_DIR_NAME,
 		     c->vi.ubi_num, c->vi.vol_id);
 	if (n == UBIFS_DFS_DIR_LEN) {
 		/* The array size is too small */
 		fname = UBIFS_DFS_DIR_NAME;
-		dent = ERR_PTR(-EINVAL);
-		goto out;
+		return;
 	}
 
 	fname = d->dfs_dir_name;
-	dent = debugfs_create_dir(fname, dfs_rootdir);
-	if (IS_ERR_OR_NULL(dent))
-		goto out;
-	d->dfs_dir = dent;
+	d->dfs_dir = debugfs_create_dir(fname, dfs_rootdir);
 
 	fname = "dump_lprops";
-	dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_dump_lprops = dent;
+	d->dfs_dump_lprops = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c,
+						 &dfs_fops);
 
 	fname = "dump_budg";
-	dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_dump_budg = dent;
+	d->dfs_dump_budg = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c,
+					       &dfs_fops);
 
 	fname = "dump_tnc";
-	dent = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c, &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_dump_tnc = dent;
+	d->dfs_dump_tnc = debugfs_create_file(fname, S_IWUSR, d->dfs_dir, c,
+					      &dfs_fops);
 
 	fname = "chk_general";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
-				   &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_chk_gen = dent;
+	d->dfs_chk_gen = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					     d->dfs_dir, c, &dfs_fops);
 
 	fname = "chk_index";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
-				   &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_chk_index = dent;
+	d->dfs_chk_index = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					       d->dfs_dir, c, &dfs_fops);
 
 	fname = "chk_orphans";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
-				   &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_chk_orph = dent;
+	d->dfs_chk_orph = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					      d->dfs_dir, c, &dfs_fops);
 
 	fname = "chk_lprops";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
-				   &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_chk_lprops = dent;
+	d->dfs_chk_lprops = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+						d->dfs_dir, c, &dfs_fops);
 
 	fname = "chk_fs";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
-				   &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_chk_fs = dent;
+	d->dfs_chk_fs = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					    d->dfs_dir, c, &dfs_fops);
 
 	fname = "tst_recovery";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
-				   &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_tst_rcvry = dent;
+	d->dfs_tst_rcvry = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					       d->dfs_dir, c, &dfs_fops);
 
 	fname = "ro_error";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, d->dfs_dir, c,
-				   &dfs_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	d->dfs_ro_error = dent;
-
-	return 0;
-
-out_remove:
-	debugfs_remove_recursive(d->dfs_dir);
-out:
-	err = dent ? PTR_ERR(dent) : -ENODEV;
-	ubifs_err(c, "cannot create \"%s\" debugfs file or directory, error %d\n",
-		  fname, err);
-	return err;
+	d->dfs_ro_error = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					      d->dfs_dir, c, &dfs_fops);
 }
 
 /**
@@ -2930,8 +2871,7 @@ out:
  */
 void dbg_debugfs_exit_fs(struct ubifs_info *c)
 {
-	if (IS_ENABLED(CONFIG_DEBUG_FS))
-		debugfs_remove_recursive(c->dbg->dfs_dir);
+	debugfs_remove_recursive(c->dbg->dfs_dir);
 }
 
 struct ubifs_global_debug_info ubifs_dbg;
@@ -3007,75 +2947,38 @@ static const struct file_operations dfs_global_fops = {
  *
  * UBIFS uses debugfs file-system to expose various debugging knobs to
  * user-space. This function creates "ubifs" directory in the debugfs
- * file-system. Returns zero in case of success and a negative error code in
- * case of failure.
+ * file-system.
  */
-int dbg_debugfs_init(void)
+void dbg_debugfs_init(void)
 {
-	int err;
 	const char *fname;
-	struct dentry *dent;
-
-	if (!IS_ENABLED(CONFIG_DEBUG_FS))
-		return 0;
 
 	fname = "ubifs";
-	dent = debugfs_create_dir(fname, NULL);
-	if (IS_ERR_OR_NULL(dent))
-		goto out;
-	dfs_rootdir = dent;
+	dfs_rootdir = debugfs_create_dir(fname, NULL);
 
 	fname = "chk_general";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
-				   &dfs_global_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	dfs_chk_gen = dent;
+	dfs_chk_gen = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir,
+					  NULL, &dfs_global_fops);
 
 	fname = "chk_index";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
-				   &dfs_global_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	dfs_chk_index = dent;
+	dfs_chk_index = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					    dfs_rootdir, NULL, &dfs_global_fops);
 
 	fname = "chk_orphans";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
-				   &dfs_global_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	dfs_chk_orph = dent;
+	dfs_chk_orph = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					   dfs_rootdir, NULL, &dfs_global_fops);
 
 	fname = "chk_lprops";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
-				   &dfs_global_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	dfs_chk_lprops = dent;
+	dfs_chk_lprops = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					     dfs_rootdir, NULL, &dfs_global_fops);
 
 	fname = "chk_fs";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
-				   &dfs_global_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	dfs_chk_fs = dent;
+	dfs_chk_fs = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir,
+					 NULL, &dfs_global_fops);
 
 	fname = "tst_recovery";
-	dent = debugfs_create_file(fname, S_IRUSR | S_IWUSR, dfs_rootdir, NULL,
-				   &dfs_global_fops);
-	if (IS_ERR_OR_NULL(dent))
-		goto out_remove;
-	dfs_tst_rcvry = dent;
-
-	return 0;
-
-out_remove:
-	debugfs_remove_recursive(dfs_rootdir);
-out:
-	err = dent ? PTR_ERR(dent) : -ENODEV;
-	pr_err("UBIFS error (pid %d): cannot create \"%s\" debugfs file or directory, error %d\n",
-	       current->pid, fname, err);
-	return err;
+	dfs_tst_rcvry = debugfs_create_file(fname, S_IRUSR | S_IWUSR,
+					    dfs_rootdir, NULL, &dfs_global_fops);
 }
 
 /**
@@ -3083,8 +2986,7 @@ out:
  */
 void dbg_debugfs_exit(void)
 {
-	if (IS_ENABLED(CONFIG_DEBUG_FS))
-		debugfs_remove_recursive(dfs_rootdir);
+	debugfs_remove_recursive(dfs_rootdir);
 }
 
 void ubifs_assert_failed(struct ubifs_info *c, const char *expr,
diff --git a/fs/ubifs/debug.h b/fs/ubifs/debug.h
index 64c6977c189b..7763639a426b 100644
--- a/fs/ubifs/debug.h
+++ b/fs/ubifs/debug.h
@@ -1,21 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -309,9 +297,9 @@ int dbg_leb_unmap(struct ubifs_info *c, int lnum);
 int dbg_leb_map(struct ubifs_info *c, int lnum);
 
 /* Debugfs-related stuff */
-int dbg_debugfs_init(void);
+void dbg_debugfs_init(void);
 void dbg_debugfs_exit(void);
-int dbg_debugfs_init_fs(struct ubifs_info *c);
+void dbg_debugfs_init_fs(struct ubifs_info *c);
 void dbg_debugfs_exit_fs(struct ubifs_info *c);
 
 #endif /* !__UBIFS_DEBUG_H__ */
diff --git a/fs/ubifs/dir.c b/fs/ubifs/dir.c
index 5767b373a8ff..0b98e3c8b461 100644
--- a/fs/ubifs/dir.c
+++ b/fs/ubifs/dir.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /* * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  * Copyright (C) 2006, 2007 University of Szeged, Hungary
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  *          Zoltan Sogor
@@ -220,11 +208,9 @@ static struct dentry *ubifs_lookup(struct inode *dir, struct dentry *dentry,
 
 	dbg_gen("'%pd' in dir ino %lu", dentry, dir->i_ino);
 
-	err = fscrypt_prepare_lookup(dir, dentry, flags);
-	if (err)
-		return ERR_PTR(err);
-
-	err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
+	err = fscrypt_prepare_lookup(dir, dentry, &nm);
+	if (err == -ENOENT)
+		return d_splice_alias(NULL, dentry);
 	if (err)
 		return ERR_PTR(err);
 
@@ -792,16 +778,14 @@ static int ubifs_unlink(struct inode *dir, struct dentry *dentry)
 		dentry, inode->i_ino,
 		inode->i_nlink, dir->i_ino);
 
-	if (ubifs_crypt_is_encrypted(dir)) {
-		err = fscrypt_get_encryption_info(dir);
-		if (err && err != -ENOKEY)
-			return err;
-	}
-
 	err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
 	if (err)
 		return err;
 
+	err = ubifs_purge_xattrs(inode);
+	if (err)
+		return err;
+
 	sz_change = CALC_DENT_SIZE(fname_len(&nm));
 
 	ubifs_assert(c, inode_is_locked(dir));
@@ -902,16 +886,14 @@ static int ubifs_rmdir(struct inode *dir, struct dentry *dentry)
 	if (err)
 		return err;
 
-	if (ubifs_crypt_is_encrypted(dir)) {
-		err = fscrypt_get_encryption_info(dir);
-		if (err && err != -ENOKEY)
-			return err;
-	}
-
 	err = fscrypt_setup_filename(dir, &dentry->d_name, 1, &nm);
 	if (err)
 		return err;
 
+	err = ubifs_purge_xattrs(inode);
+	if (err)
+		return err;
+
 	sz_change = CALC_DENT_SIZE(fname_len(&nm));
 
 	err = ubifs_budget_space(c, &req);
@@ -1294,9 +1276,14 @@ static int do_rename(struct inode *old_dir, struct dentry *old_dentry,
 		old_dentry, old_inode->i_ino, old_dir->i_ino,
 		new_dentry, new_dir->i_ino, flags);
 
-	if (unlink)
+	if (unlink) {
 		ubifs_assert(c, inode_is_locked(new_inode));
 
+		err = ubifs_purge_xattrs(new_inode);
+		if (err)
+			return err;
+	}
+
 	if (unlink && is_dir) {
 		err = ubifs_check_dir_empty(new_inode);
 		if (err)
@@ -1652,9 +1639,7 @@ const struct inode_operations ubifs_dir_inode_operations = {
 #ifdef CONFIG_UBIFS_FS_XATTR
 	.listxattr   = ubifs_listxattr,
 #endif
-#ifdef CONFIG_UBIFS_ATIME_SUPPORT
 	.update_time = ubifs_update_time,
-#endif
 	.tmpfile     = ubifs_tmpfile,
 };
 
diff --git a/fs/ubifs/file.c b/fs/ubifs/file.c
index 5d2ffb1a45fc..e5f8de62fc51 100644
--- a/fs/ubifs/file.c
+++ b/fs/ubifs/file.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -1375,7 +1363,6 @@ static inline int mctime_update_needed(const struct inode *inode,
 	return 0;
 }
 
-#ifdef CONFIG_UBIFS_ATIME_SUPPORT
 /**
  * ubifs_update_time - update time of inode.
  * @inode: inode to update
@@ -1392,6 +1379,9 @@ int ubifs_update_time(struct inode *inode, struct timespec64 *time,
 	int iflags = I_DIRTY_TIME;
 	int err, release;
 
+	if (!IS_ENABLED(CONFIG_UBIFS_ATIME_SUPPORT))
+		return generic_update_time(inode, time, flags);
+
 	err = ubifs_budget_space(c, &req);
 	if (err)
 		return err;
@@ -1414,7 +1404,6 @@ int ubifs_update_time(struct inode *inode, struct timespec64 *time,
 		ubifs_release_budget(c, &req);
 	return 0;
 }
-#endif
 
 /**
  * update_mctime - update mtime and ctime of an inode.
@@ -1623,9 +1612,10 @@ static int ubifs_file_mmap(struct file *file, struct vm_area_struct *vma)
 	if (err)
 		return err;
 	vma->vm_ops = &ubifs_file_vm_ops;
-#ifdef CONFIG_UBIFS_ATIME_SUPPORT
-	file_accessed(file);
-#endif
+
+	if (IS_ENABLED(CONFIG_UBIFS_ATIME_SUPPORT))
+		file_accessed(file);
+
 	return 0;
 }
 
@@ -1663,9 +1653,7 @@ const struct inode_operations ubifs_file_inode_operations = {
 #ifdef CONFIG_UBIFS_FS_XATTR
 	.listxattr   = ubifs_listxattr,
 #endif
-#ifdef CONFIG_UBIFS_ATIME_SUPPORT
 	.update_time = ubifs_update_time,
-#endif
 };
 
 const struct inode_operations ubifs_symlink_inode_operations = {
@@ -1675,9 +1663,7 @@ const struct inode_operations ubifs_symlink_inode_operations = {
 #ifdef CONFIG_UBIFS_FS_XATTR
 	.listxattr   = ubifs_listxattr,
 #endif
-#ifdef CONFIG_UBIFS_ATIME_SUPPORT
 	.update_time = ubifs_update_time,
-#endif
 };
 
 const struct file_operations ubifs_file_operations = {
diff --git a/fs/ubifs/find.c b/fs/ubifs/find.c
index f9646835b026..873e6e1c92b5 100644
--- a/fs/ubifs/find.c
+++ b/fs/ubifs/find.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -747,12 +735,6 @@ static int cmp_dirty_idx(const struct ubifs_lprops **a,
 	return lpa->dirty + lpa->free - lpb->dirty - lpb->free;
 }
 
-static void swap_dirty_idx(struct ubifs_lprops **a, struct ubifs_lprops **b,
-			   int size)
-{
-	swap(*a, *b);
-}
-
 /**
  * ubifs_save_dirty_idx_lnums - save an array of the most dirty index LEB nos.
  * @c: the UBIFS file-system description object
@@ -772,8 +754,7 @@ int ubifs_save_dirty_idx_lnums(struct ubifs_info *c)
 	       sizeof(void *) * c->dirty_idx.cnt);
 	/* Sort it so that the dirtiest is now at the end */
 	sort(c->dirty_idx.arr, c->dirty_idx.cnt, sizeof(void *),
-	     (int (*)(const void *, const void *))cmp_dirty_idx,
-	     (void (*)(void *, void *, int))swap_dirty_idx);
+	     (int (*)(const void *, const void *))cmp_dirty_idx, NULL);
 	dbg_find("found %d dirty index LEBs", c->dirty_idx.cnt);
 	if (c->dirty_idx.cnt)
 		dbg_find("dirtiest index LEB is %d with dirty %d and free %d",
diff --git a/fs/ubifs/gc.c b/fs/ubifs/gc.c
index bf75fdc76fc3..62cb3db44e6e 100644
--- a/fs/ubifs/gc.c
+++ b/fs/ubifs/gc.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
diff --git a/fs/ubifs/io.c b/fs/ubifs/io.c
index d124117efd42..8ceb51478800 100644
--- a/fs/ubifs/io.c
+++ b/fs/ubifs/io.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  * Copyright (C) 2006, 2007 University of Szeged, Hungary
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  *          Zoltan Sogor
diff --git a/fs/ubifs/ioctl.c b/fs/ubifs/ioctl.c
index 0164bcc827f8..034ad14710d1 100644
--- a/fs/ubifs/ioctl.c
+++ b/fs/ubifs/ioctl.c
@@ -1,22 +1,10 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  * Copyright (C) 2006, 2007 University of Szeged, Hungary
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Zoltan Sogor
  *          Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
@@ -28,6 +16,11 @@
 #include <linux/mount.h>
 #include "ubifs.h"
 
+/* Need to be kept consistent with checked flags in ioctl2ubifs() */
+#define UBIFS_SUPPORTED_IOCTL_FLAGS \
+	(FS_COMPR_FL | FS_SYNC_FL | FS_APPEND_FL | \
+	 FS_IMMUTABLE_FL | FS_DIRSYNC_FL)
+
 /**
  * ubifs_set_inode_flags - set VFS inode flags.
  * @inode: VFS inode to set flags for
@@ -114,18 +107,11 @@ static int setflags(struct inode *inode, int flags)
 	if (err)
 		return err;
 
-	/*
-	 * The IMMUTABLE and APPEND_ONLY flags can only be changed by
-	 * the relevant capability.
-	 */
 	mutex_lock(&ui->ui_mutex);
 	oldflags = ubifs2ioctl(ui->flags);
-	if ((flags ^ oldflags) & (FS_APPEND_FL | FS_IMMUTABLE_FL)) {
-		if (!capable(CAP_LINUX_IMMUTABLE)) {
-			err = -EPERM;
-			goto out_unlock;
-		}
-	}
+	err = vfs_ioc_setflags_prepare(inode, oldflags, flags);
+	if (err)
+		goto out_unlock;
 
 	ui->flags = ioctl2ubifs(flags);
 	ubifs_set_inode_flags(inode);
@@ -169,6 +155,9 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		if (get_user(flags, (int __user *) arg))
 			return -EFAULT;
 
+		if (flags & ~UBIFS_SUPPORTED_IOCTL_FLAGS)
+			return -EOPNOTSUPP;
+
 		if (!S_ISDIR(inode->i_mode))
 			flags &= ~FS_DIRSYNC_FL;
 
@@ -185,7 +174,6 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 		return err;
 	}
 	case FS_IOC_SET_ENCRYPTION_POLICY: {
-#ifdef CONFIG_UBIFS_FS_ENCRYPTION
 		struct ubifs_info *c = inode->i_sb->s_fs_info;
 
 		err = ubifs_enable_encryption(c);
@@ -193,17 +181,9 @@ long ubifs_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
 			return err;
 
 		return fscrypt_ioctl_set_policy(file, (const void __user *)arg);
-#else
-		return -EOPNOTSUPP;
-#endif
 	}
-	case FS_IOC_GET_ENCRYPTION_POLICY: {
-#ifdef CONFIG_UBIFS_FS_ENCRYPTION
+	case FS_IOC_GET_ENCRYPTION_POLICY:
 		return fscrypt_ioctl_get_policy(file, (void __user *)arg);
-#else
-		return -EOPNOTSUPP;
-#endif
-	}
 
 	default:
 		return -ENOTTY;
diff --git a/fs/ubifs/journal.c b/fs/ubifs/journal.c
index 729dc76c83df..4fd9683b8245 100644
--- a/fs/ubifs/journal.c
+++ b/fs/ubifs/journal.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -852,10 +840,11 @@ out_free:
 int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
 {
 	int err, lnum, offs;
-	struct ubifs_ino_node *ino;
+	struct ubifs_ino_node *ino, *ino_start;
 	struct ubifs_inode *ui = ubifs_inode(inode);
-	int sync = 0, write_len, ilen = UBIFS_INO_NODE_SZ;
+	int sync = 0, write_len = 0, ilen = UBIFS_INO_NODE_SZ;
 	int last_reference = !inode->i_nlink;
+	int kill_xattrs = ui->xattr_cnt && last_reference;
 	u8 hash[UBIFS_HASH_ARR_SZ];
 
 	dbg_jnl("ino %lu, nlink %u", inode->i_ino, inode->i_nlink);
@@ -867,14 +856,16 @@ int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
 	if (!last_reference) {
 		ilen += ui->data_len;
 		sync = IS_SYNC(inode);
+	} else if (kill_xattrs) {
+		write_len += UBIFS_INO_NODE_SZ * ui->xattr_cnt;
 	}
 
 	if (ubifs_authenticated(c))
-		write_len = ALIGN(ilen, 8) + ubifs_auth_node_sz(c);
+		write_len += ALIGN(ilen, 8) + ubifs_auth_node_sz(c);
 	else
-		write_len = ilen;
+		write_len += ilen;
 
-	ino = kmalloc(write_len, GFP_NOFS);
+	ino_start = ino = kmalloc(write_len, GFP_NOFS);
 	if (!ino)
 		return -ENOMEM;
 
@@ -883,12 +874,59 @@ int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
 	if (err)
 		goto out_free;
 
+	if (kill_xattrs) {
+		union ubifs_key key;
+		struct fscrypt_name nm = {0};
+		struct inode *xino;
+		struct ubifs_dent_node *xent, *pxent = NULL;
+
+		if (ui->xattr_cnt >= ubifs_xattr_max_cnt(c)) {
+			ubifs_err(c, "Cannot delete inode, it has too much xattrs!");
+			goto out_release;
+		}
+
+		lowest_xent_key(c, &key, inode->i_ino);
+		while (1) {
+			xent = ubifs_tnc_next_ent(c, &key, &nm);
+			if (IS_ERR(xent)) {
+				err = PTR_ERR(xent);
+				if (err == -ENOENT)
+					break;
+
+				goto out_release;
+			}
+
+			fname_name(&nm) = xent->name;
+			fname_len(&nm) = le16_to_cpu(xent->nlen);
+
+			xino = ubifs_iget(c->vfs_sb, xent->inum);
+			if (IS_ERR(xino)) {
+				err = PTR_ERR(xino);
+				ubifs_err(c, "dead directory entry '%s', error %d",
+					  xent->name, err);
+				ubifs_ro_mode(c, err);
+				goto out_release;
+			}
+			ubifs_assert(c, ubifs_inode(xino)->xattr);
+
+			clear_nlink(xino);
+			pack_inode(c, ino, xino, 0);
+			ino = (void *)ino + UBIFS_INO_NODE_SZ;
+			iput(xino);
+
+			kfree(pxent);
+			pxent = xent;
+			key_read(c, &xent->key, &key);
+		}
+		kfree(pxent);
+	}
+
 	pack_inode(c, ino, inode, 1);
 	err = ubifs_node_calc_hash(c, ino, hash);
 	if (err)
 		goto out_release;
 
-	err = write_head(c, BASEHD, ino, write_len, &lnum, &offs, sync);
+	err = write_head(c, BASEHD, ino_start, write_len, &lnum, &offs, sync);
 	if (err)
 		goto out_release;
 	if (!sync)
@@ -903,7 +941,7 @@ int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
 		if (err)
 			goto out_ro;
 		ubifs_delete_orphan(c, inode->i_ino);
-		err = ubifs_add_dirt(c, lnum, ilen);
+		err = ubifs_add_dirt(c, lnum, write_len);
 	} else {
 		union ubifs_key key;
 
@@ -917,7 +955,7 @@ int ubifs_jnl_write_inode(struct ubifs_info *c, const struct inode *inode)
 	spin_lock(&ui->ui_lock);
 	ui->synced_i_size = ui->ui_size;
 	spin_unlock(&ui->ui_lock);
-	kfree(ino);
+	kfree(ino_start);
 	return 0;
 
 out_release:
@@ -926,7 +964,7 @@ out_ro:
 	ubifs_ro_mode(c, err);
 	finish_reservation(c);
 out_free:
-	kfree(ino);
+	kfree(ino_start);
 	return err;
 }
 
@@ -966,8 +1004,8 @@ int ubifs_jnl_delete_inode(struct ubifs_info *c, const struct inode *inode)
 
 	ubifs_assert(c, inode->i_nlink == 0);
 
-	if (ui->del_cmtno != c->cmt_no)
-		/* A commit happened for sure */
+	if (ui->xattr_cnt || ui->del_cmtno != c->cmt_no)
+		/* A commit happened for sure or inode hosts xattrs */
 		return ubifs_jnl_write_inode(c, inode);
 
 	down_read(&c->commit_sem);
diff --git a/fs/ubifs/key.h b/fs/ubifs/key.h
index 2feff6cbbb77..afa704ff5ca0 100644
--- a/fs/ubifs/key.h
+++ b/fs/ubifs/key.h
@@ -1,21 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
diff --git a/fs/ubifs/log.c b/fs/ubifs/log.c
index 15fd854149bb..b6ac9c4281ef 100644
--- a/fs/ubifs/log.c
+++ b/fs/ubifs/log.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -450,10 +438,7 @@ int ubifs_log_start_commit(struct ubifs_info *c, int *ltail_lnum)
 	*ltail_lnum = c->lhead_lnum;
 
 	c->lhead_offs += len;
-	if (c->lhead_offs == c->leb_size) {
-		c->lhead_lnum = ubifs_next_log_lnum(c, c->lhead_lnum);
-		c->lhead_offs = 0;
-	}
+	ubifs_assert(c, c->lhead_offs < c->leb_size);
 
 	remove_buds(c);
 
diff --git a/fs/ubifs/lprops.c b/fs/ubifs/lprops.c
index fa8d775c9753..29826c51883a 100644
--- a/fs/ubifs/lprops.c
+++ b/fs/ubifs/lprops.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
diff --git a/fs/ubifs/lpt.c b/fs/ubifs/lpt.c
index b0c5f06128b5..e21abf250951 100644
--- a/fs/ubifs/lpt.c
+++ b/fs/ubifs/lpt.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
diff --git a/fs/ubifs/lpt_commit.c b/fs/ubifs/lpt_commit.c
index 1f88caffdf2a..ff5e0411cf2d 100644
--- a/fs/ubifs/lpt_commit.c
+++ b/fs/ubifs/lpt_commit.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
diff --git a/fs/ubifs/master.c b/fs/ubifs/master.c
index 5ea51bbd14c7..52a85c01397e 100644
--- a/fs/ubifs/master.c
+++ b/fs/ubifs/master.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -60,6 +48,39 @@ int ubifs_compare_master_node(struct ubifs_info *c, void *m1, void *m2)
 	return 0;
 }
 
+/* mst_node_check_hash - Check hash of a master node
+ * @c: UBIFS file-system description object
+ * @mst: The master node
+ * @expected: The expected hash of the master node
+ *
+ * This checks the hash of a master node against a given expected hash.
+ * Note that we have two master nodes on a UBIFS image which have different
+ * sequence numbers and consequently different CRCs. To be able to match
+ * both master nodes we exclude the common node header containing the sequence
+ * number and CRC from the hash.
+ *
+ * Returns 0 if the hashes are equal, a negative error code otherwise.
+ */
+static int mst_node_check_hash(const struct ubifs_info *c,
+			       const struct ubifs_mst_node *mst,
+			       const u8 *expected)
+{
+	u8 calc[UBIFS_MAX_HASH_LEN];
+	const void *node = mst;
+
+	SHASH_DESC_ON_STACK(shash, c->hash_tfm);
+
+	shash->tfm = c->hash_tfm;
+
+	crypto_shash_digest(shash, node + sizeof(struct ubifs_ch),
+			    UBIFS_MST_NODE_SZ - sizeof(struct ubifs_ch), calc);
+
+	if (ubifs_check_hash(c, expected, calc))
+		return -EPERM;
+
+	return 0;
+}
+
 /**
  * scan_for_master - search the valid master node.
  * @c: UBIFS file-system description object
@@ -114,14 +135,22 @@ static int scan_for_master(struct ubifs_info *c)
 	if (!ubifs_authenticated(c))
 		return 0;
 
-	err = ubifs_node_verify_hmac(c, c->mst_node,
-				     sizeof(struct ubifs_mst_node),
-				     offsetof(struct ubifs_mst_node, hmac));
-	if (err) {
-		ubifs_err(c, "Failed to verify master node HMAC");
-		return -EPERM;
+	if (ubifs_hmac_zero(c, c->mst_node->hmac)) {
+		err = mst_node_check_hash(c, c->mst_node,
+					  c->sup_node->hash_mst);
+		if (err)
+			ubifs_err(c, "Failed to verify master node hash");
+	} else {
+		err = ubifs_node_verify_hmac(c, c->mst_node,
+					sizeof(struct ubifs_mst_node),
+					offsetof(struct ubifs_mst_node, hmac));
+		if (err)
+			ubifs_err(c, "Failed to verify master node HMAC");
 	}
 
+	if (err)
+		return -EPERM;
+
 	return 0;
 
 out:
diff --git a/fs/ubifs/misc.h b/fs/ubifs/misc.h
index 6f87237fdbf4..c97a4d537d83 100644
--- a/fs/ubifs/misc.h
+++ b/fs/ubifs/misc.h
@@ -1,21 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -288,6 +276,14 @@ static inline int ubifs_next_log_lnum(const struct ubifs_info *c, int lnum)
 	return lnum;
 }
 
+static inline int ubifs_xattr_max_cnt(struct ubifs_info *c)
+{
+	int max_xattrs = (c->leb_size / 2) / UBIFS_INO_NODE_SZ;
+
+	ubifs_assert(c, max_xattrs < c->max_orphans);
+	return max_xattrs;
+}
+
 const char *ubifs_assert_action_name(struct ubifs_info *c);
 
 #endif /* __UBIFS_MISC_H__ */
diff --git a/fs/ubifs/orphan.c b/fs/ubifs/orphan.c
index 8f70494efb0c..b52624e28fa1 100644
--- a/fs/ubifs/orphan.c
+++ b/fs/ubifs/orphan.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Author: Adrian Hunter
  */
 
@@ -54,30 +42,24 @@
 
 static int dbg_check_orphans(struct ubifs_info *c);
 
-/**
- * ubifs_add_orphan - add an orphan.
- * @c: UBIFS file-system description object
- * @inum: orphan inode number
- *
- * Add an orphan. This function is called when an inodes link count drops to
- * zero.
- */
-int ubifs_add_orphan(struct ubifs_info *c, ino_t inum)
+static struct ubifs_orphan *orphan_add(struct ubifs_info *c, ino_t inum,
+				       struct ubifs_orphan *parent_orphan)
 {
 	struct ubifs_orphan *orphan, *o;
 	struct rb_node **p, *parent = NULL;
 
 	orphan = kzalloc(sizeof(struct ubifs_orphan), GFP_NOFS);
 	if (!orphan)
-		return -ENOMEM;
+		return ERR_PTR(-ENOMEM);
 	orphan->inum = inum;
 	orphan->new = 1;
+	INIT_LIST_HEAD(&orphan->child_list);
 
 	spin_lock(&c->orphan_lock);
 	if (c->tot_orphans >= c->max_orphans) {
 		spin_unlock(&c->orphan_lock);
 		kfree(orphan);
-		return -ENFILE;
+		return ERR_PTR(-ENFILE);
 	}
 	p = &c->orph_tree.rb_node;
 	while (*p) {
@@ -91,7 +73,7 @@ int ubifs_add_orphan(struct ubifs_info *c, ino_t inum)
 			ubifs_err(c, "orphaned twice");
 			spin_unlock(&c->orphan_lock);
 			kfree(orphan);
-			return 0;
+			return ERR_PTR(-EINVAL);
 		}
 	}
 	c->tot_orphans += 1;
@@ -100,24 +82,22 @@ int ubifs_add_orphan(struct ubifs_info *c, ino_t inum)
 	rb_insert_color(&orphan->rb, &c->orph_tree);
 	list_add_tail(&orphan->list, &c->orph_list);
 	list_add_tail(&orphan->new_list, &c->orph_new);
+
+	if (parent_orphan) {
+		list_add_tail(&orphan->child_list,
+			      &parent_orphan->child_list);
+	}
+
 	spin_unlock(&c->orphan_lock);
 	dbg_gen("ino %lu", (unsigned long)inum);
-	return 0;
+	return orphan;
 }
 
-/**
- * ubifs_delete_orphan - delete an orphan.
- * @c: UBIFS file-system description object
- * @inum: orphan inode number
- *
- * Delete an orphan. This function is called when an inode is deleted.
- */
-void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum)
+static struct ubifs_orphan *lookup_orphan(struct ubifs_info *c, ino_t inum)
 {
 	struct ubifs_orphan *o;
 	struct rb_node *p;
 
-	spin_lock(&c->orphan_lock);
 	p = c->orph_tree.rb_node;
 	while (p) {
 		o = rb_entry(p, struct ubifs_orphan, rb);
@@ -126,37 +106,122 @@ void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum)
 		else if (inum > o->inum)
 			p = p->rb_right;
 		else {
-			if (o->del) {
-				spin_unlock(&c->orphan_lock);
-				dbg_gen("deleted twice ino %lu",
-					(unsigned long)inum);
-				return;
-			}
-			if (o->cmt) {
-				o->del = 1;
-				o->dnext = c->orph_dnext;
-				c->orph_dnext = o;
-				spin_unlock(&c->orphan_lock);
-				dbg_gen("delete later ino %lu",
-					(unsigned long)inum);
-				return;
-			}
-			rb_erase(p, &c->orph_tree);
-			list_del(&o->list);
-			c->tot_orphans -= 1;
-			if (o->new) {
-				list_del(&o->new_list);
-				c->new_orphans -= 1;
-			}
-			spin_unlock(&c->orphan_lock);
-			kfree(o);
-			dbg_gen("inum %lu", (unsigned long)inum);
-			return;
+			return o;
+		}
+	}
+	return NULL;
+}
+
+static void __orphan_drop(struct ubifs_info *c, struct ubifs_orphan *o)
+{
+	rb_erase(&o->rb, &c->orph_tree);
+	list_del(&o->list);
+	c->tot_orphans -= 1;
+
+	if (o->new) {
+		list_del(&o->new_list);
+		c->new_orphans -= 1;
+	}
+
+	kfree(o);
+}
+
+static void orphan_delete(struct ubifs_info *c, struct ubifs_orphan *orph)
+{
+	if (orph->del) {
+		spin_unlock(&c->orphan_lock);
+		dbg_gen("deleted twice ino %lu", orph->inum);
+		return;
+	}
+
+	if (orph->cmt) {
+		orph->del = 1;
+		orph->dnext = c->orph_dnext;
+		c->orph_dnext = orph;
+		spin_unlock(&c->orphan_lock);
+		dbg_gen("delete later ino %lu", orph->inum);
+		return;
+	}
+
+	__orphan_drop(c, orph);
+}
+
+/**
+ * ubifs_add_orphan - add an orphan.
+ * @c: UBIFS file-system description object
+ * @inum: orphan inode number
+ *
+ * Add an orphan. This function is called when an inodes link count drops to
+ * zero.
+ */
+int ubifs_add_orphan(struct ubifs_info *c, ino_t inum)
+{
+	int err = 0;
+	ino_t xattr_inum;
+	union ubifs_key key;
+	struct ubifs_dent_node *xent;
+	struct fscrypt_name nm = {0};
+	struct ubifs_orphan *xattr_orphan;
+	struct ubifs_orphan *orphan;
+
+	orphan = orphan_add(c, inum, NULL);
+	if (IS_ERR(orphan))
+		return PTR_ERR(orphan);
+
+	lowest_xent_key(c, &key, inum);
+	while (1) {
+		xent = ubifs_tnc_next_ent(c, &key, &nm);
+		if (IS_ERR(xent)) {
+			err = PTR_ERR(xent);
+			if (err == -ENOENT)
+				break;
+			return err;
 		}
+
+		fname_name(&nm) = xent->name;
+		fname_len(&nm) = le16_to_cpu(xent->nlen);
+		xattr_inum = le64_to_cpu(xent->inum);
+
+		xattr_orphan = orphan_add(c, xattr_inum, orphan);
+		if (IS_ERR(xattr_orphan))
+			return PTR_ERR(xattr_orphan);
+
+		key_read(c, &xent->key, &key);
 	}
+
+	return 0;
+}
+
+/**
+ * ubifs_delete_orphan - delete an orphan.
+ * @c: UBIFS file-system description object
+ * @inum: orphan inode number
+ *
+ * Delete an orphan. This function is called when an inode is deleted.
+ */
+void ubifs_delete_orphan(struct ubifs_info *c, ino_t inum)
+{
+	struct ubifs_orphan *orph, *child_orph, *tmp_o;
+
+	spin_lock(&c->orphan_lock);
+
+	orph = lookup_orphan(c, inum);
+	if (!orph) {
+		spin_unlock(&c->orphan_lock);
+		ubifs_err(c, "missing orphan ino %lu", (unsigned long)inum);
+		dump_stack();
+
+		return;
+	}
+
+	list_for_each_entry_safe(child_orph, tmp_o, &orph->child_list, child_list) {
+		list_del(&child_orph->child_list);
+		orphan_delete(c, child_orph);
+	}
+	
+	orphan_delete(c, orph);
+
 	spin_unlock(&c->orphan_lock);
-	ubifs_err(c, "missing orphan ino %lu", (unsigned long)inum);
-	dump_stack();
 }
 
 /**
@@ -563,6 +628,7 @@ static int do_kill_orphans(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
 {
 	struct ubifs_scan_node *snod;
 	struct ubifs_orph_node *orph;
+	struct ubifs_ino_node *ino = NULL;
 	unsigned long long cmt_no;
 	ino_t inum;
 	int i, n, err, first = 1;
@@ -609,17 +675,40 @@ static int do_kill_orphans(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
 		if (first)
 			first = 0;
 
+		ino = kmalloc(UBIFS_MAX_INO_NODE_SZ, GFP_NOFS);
+		if (!ino)
+			return -ENOMEM;
+
 		n = (le32_to_cpu(orph->ch.len) - UBIFS_ORPH_NODE_SZ) >> 3;
 		for (i = 0; i < n; i++) {
+			union ubifs_key key1, key2;
+
 			inum = le64_to_cpu(orph->inos[i]);
-			dbg_rcvry("deleting orphaned inode %lu",
-				  (unsigned long)inum);
-			err = ubifs_tnc_remove_ino(c, inum);
+
+			ino_key_init(c, &key1, inum);
+			err = ubifs_tnc_lookup(c, &key1, ino);
 			if (err)
-				return err;
+				goto out_free;
+
+			/*
+			 * Check whether an inode can really get deleted.
+			 * linkat() with O_TMPFILE allows rebirth of an inode.
+			 */
+			if (ino->nlink == 0) {
+				dbg_rcvry("deleting orphaned inode %lu",
+					  (unsigned long)inum);
+
+				lowest_ino_key(c, &key1, inum);
+				highest_ino_key(c, &key2, inum);
+
+				err = ubifs_tnc_remove_range(c, &key1, &key2);
+				if (err)
+					goto out_ro;
+			}
+
 			err = insert_dead_orphan(c, inum);
 			if (err)
-				return err;
+				goto out_free;
 		}
 
 		*last_cmt_no = cmt_no;
@@ -631,7 +720,15 @@ static int do_kill_orphans(struct ubifs_info *c, struct ubifs_scan_leb *sleb,
 			*last_flagged = 0;
 	}
 
-	return 0;
+	err = 0;
+out_free:
+	kfree(ino);
+	return err;
+
+out_ro:
+	ubifs_ro_mode(c, err);
+	kfree(ino);
+	return err;
 }
 
 /**
@@ -744,26 +841,15 @@ struct check_info {
 	struct rb_root root;
 };
 
-static int dbg_find_orphan(struct ubifs_info *c, ino_t inum)
+static bool dbg_find_orphan(struct ubifs_info *c, ino_t inum)
 {
-	struct ubifs_orphan *o;
-	struct rb_node *p;
+	bool found = false;
 
 	spin_lock(&c->orphan_lock);
-	p = c->orph_tree.rb_node;
-	while (p) {
-		o = rb_entry(p, struct ubifs_orphan, rb);
-		if (inum < o->inum)
-			p = p->rb_left;
-		else if (inum > o->inum)
-			p = p->rb_right;
-		else {
-			spin_unlock(&c->orphan_lock);
-			return 1;
-		}
-	}
+	found = !!lookup_orphan(c, inum);
 	spin_unlock(&c->orphan_lock);
-	return 0;
+
+	return found;
 }
 
 static int dbg_ins_check_orphan(struct rb_root *root, ino_t inum)
diff --git a/fs/ubifs/recovery.c b/fs/ubifs/recovery.c
index 8526b7ec4707..f116f7b3f9e5 100644
--- a/fs/ubifs/recovery.c
+++ b/fs/ubifs/recovery.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
@@ -830,7 +818,7 @@ static int get_cs_sqnum(struct ubifs_info *c, int lnum, int offs,
 		goto out_err;
 	}
 	if (cs_node->ch.node_type != UBIFS_CS_NODE) {
-		ubifs_err(c, "Node a CS node, type is %d", cs_node->ch.node_type);
+		ubifs_err(c, "Not a CS node, type is %d", cs_node->ch.node_type);
 		goto out_err;
 	}
 	if (le64_to_cpu(cs_node->cmt_no) != c->cmt_no) {
diff --git a/fs/ubifs/replay.c b/fs/ubifs/replay.c
index 0a0e65c07c6d..b28ac4dfb407 100644
--- a/fs/ubifs/replay.c
+++ b/fs/ubifs/replay.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
@@ -576,7 +564,6 @@ static int authenticate_sleb_hash(struct ubifs_info *c, struct shash_desc *log_h
 	SHASH_DESC_ON_STACK(hash_desc, c->hash_tfm);
 
 	hash_desc->tfm = c->hash_tfm;
-	hash_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
 	ubifs_shash_copy_state(c, log_hash, hash_desc);
 	return crypto_shash_final(hash_desc, hash);
@@ -587,7 +574,6 @@ static int authenticate_sleb_hmac(struct ubifs_info *c, u8 *hash, u8 *hmac)
 	SHASH_DESC_ON_STACK(hmac_desc, c->hmac_tfm);
 
 	hmac_desc->tfm = c->hmac_tfm;
-	hmac_desc->flags = CRYPTO_TFM_REQ_MAY_SLEEP;
 
 	return crypto_shash_digest(hmac_desc, hash, c->hash_len, hmac);
 }
diff --git a/fs/ubifs/sb.c b/fs/ubifs/sb.c
index 3da90c951c23..a551eb3e9b89 100644
--- a/fs/ubifs/sb.c
+++ b/fs/ubifs/sb.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -590,17 +578,26 @@ static int authenticate_sb_node(struct ubifs_info *c,
 		return -EINVAL;
 	}
 
-	err = ubifs_hmac_wkm(c, hmac_wkm);
-	if (err)
-		return err;
-
-	if (ubifs_check_hmac(c, hmac_wkm, sup->hmac_wkm)) {
-		ubifs_err(c, "provided key does not fit");
-		return -ENOKEY;
+	/*
+	 * The super block node can either be authenticated by a HMAC or
+	 * by a signature in a ubifs_sig_node directly following the
+	 * super block node to support offline image creation.
+	 */
+	if (ubifs_hmac_zero(c, sup->hmac)) {
+		err = ubifs_sb_verify_signature(c, sup);
+	} else {
+		err = ubifs_hmac_wkm(c, hmac_wkm);
+		if (err)
+			return err;
+		if (ubifs_check_hmac(c, hmac_wkm, sup->hmac_wkm)) {
+			ubifs_err(c, "provided key does not fit");
+			return -ENOKEY;
+		}
+		err = ubifs_node_verify_hmac(c, sup, sizeof(*sup),
+					     offsetof(struct ubifs_sb_node,
+						      hmac));
 	}
 
-	err = ubifs_node_verify_hmac(c, sup, sizeof(*sup),
-				     offsetof(struct ubifs_sb_node, hmac));
 	if (err)
 		ubifs_err(c, "Failed to authenticate superblock: %d", err);
 
@@ -748,31 +745,24 @@ int ubifs_read_superblock(struct ubifs_info *c)
 		goto out;
 	}
 
-#ifndef CONFIG_UBIFS_FS_ENCRYPTION
-	if (c->encrypted) {
+	if (!IS_ENABLED(CONFIG_FS_ENCRYPTION) && c->encrypted) {
 		ubifs_err(c, "file system contains encrypted files but UBIFS"
 			     " was built without crypto support.");
 		err = -EINVAL;
 		goto out;
 	}
-#endif
 
 	/* Automatically increase file system size to the maximum size */
-	c->old_leb_cnt = c->leb_cnt;
 	if (c->leb_cnt < c->vi.size && c->leb_cnt < c->max_leb_cnt) {
+		int old_leb_cnt = c->leb_cnt;
+
 		c->leb_cnt = min_t(int, c->max_leb_cnt, c->vi.size);
-		if (c->ro_mount)
-			dbg_mnt("Auto resizing (ro) from %d LEBs to %d LEBs",
-				c->old_leb_cnt,	c->leb_cnt);
-		else {
-			dbg_mnt("Auto resizing (sb) from %d LEBs to %d LEBs",
-				c->old_leb_cnt, c->leb_cnt);
-			sup->leb_cnt = cpu_to_le32(c->leb_cnt);
-			err = ubifs_write_sb_node(c, sup);
-			if (err)
-				goto out;
-			c->old_leb_cnt = c->leb_cnt;
-		}
+		sup->leb_cnt = cpu_to_le32(c->leb_cnt);
+
+		c->superblock_need_write = 1;
+
+		dbg_mnt("Auto resizing from %d LEBs to %d LEBs",
+			old_leb_cnt, c->leb_cnt);
 	}
 
 	c->log_bytes = (long long)c->log_lebs * c->leb_size;
@@ -930,9 +920,7 @@ int ubifs_fixup_free_space(struct ubifs_info *c)
 	c->space_fixup = 0;
 	sup->flags &= cpu_to_le32(~UBIFS_FLG_SPACE_FIXUP);
 
-	err = ubifs_write_sb_node(c, sup);
-	if (err)
-		return err;
+	c->superblock_need_write = 1;
 
 	ubifs_msg(c, "free space fixup complete");
 	return err;
@@ -943,6 +931,9 @@ int ubifs_enable_encryption(struct ubifs_info *c)
 	int err;
 	struct ubifs_sb_node *sup = c->sup_node;
 
+	if (!IS_ENABLED(CONFIG_FS_ENCRYPTION))
+		return -EOPNOTSUPP;
+
 	if (c->encrypted)
 		return 0;
 
diff --git a/fs/ubifs/scan.c b/fs/ubifs/scan.c
index ea88926163f4..c69cdb5e65bc 100644
--- a/fs/ubifs/scan.c
+++ b/fs/ubifs/scan.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
diff --git a/fs/ubifs/shrinker.c b/fs/ubifs/shrinker.c
index 5eb5958723d4..d00a6f20ac7b 100644
--- a/fs/ubifs/shrinker.c
+++ b/fs/ubifs/shrinker.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
diff --git a/fs/ubifs/super.c b/fs/ubifs/super.c
index 1fac1133dadd..2c0803b0ac3a 100644
--- a/fs/ubifs/super.c
+++ b/fs/ubifs/super.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -129,9 +117,10 @@ struct inode *ubifs_iget(struct super_block *sb, unsigned long inum)
 		goto out_ino;
 
 	inode->i_flags |= S_NOCMTIME;
-#ifndef CONFIG_UBIFS_ATIME_SUPPORT
-	inode->i_flags |= S_NOATIME;
-#endif
+
+	if (!IS_ENABLED(CONFIG_UBIFS_ATIME_SUPPORT))
+		inode->i_flags |= S_NOATIME;
+
 	set_nlink(inode, le32_to_cpu(ino->nlink));
 	i_uid_write(inode, le32_to_cpu(ino->uid));
 	i_gid_write(inode, le32_to_cpu(ino->gid));
@@ -272,19 +261,14 @@ static struct inode *ubifs_alloc_inode(struct super_block *sb)
 	return &ui->vfs_inode;
 };
 
-static void ubifs_i_callback(struct rcu_head *head)
-{
-	struct inode *inode = container_of(head, struct inode, i_rcu);
-	struct ubifs_inode *ui = ubifs_inode(inode);
-	kmem_cache_free(ubifs_inode_slab, ui);
-}
-
-static void ubifs_destroy_inode(struct inode *inode)
+static void ubifs_free_inode(struct inode *inode)
 {
 	struct ubifs_inode *ui = ubifs_inode(inode);
 
 	kfree(ui->data);
-	call_rcu(&inode->i_rcu, ubifs_i_callback);
+	fscrypt_free_inode(inode);
+
+	kmem_cache_free(ubifs_inode_slab, ui);
 }
 
 /*
@@ -582,6 +566,8 @@ static int init_constants_early(struct ubifs_info *c)
 	c->ranges[UBIFS_AUTH_NODE].min_len = UBIFS_AUTH_NODE_SZ;
 	c->ranges[UBIFS_AUTH_NODE].max_len = UBIFS_AUTH_NODE_SZ +
 				UBIFS_MAX_HMAC_LEN;
+	c->ranges[UBIFS_SIG_NODE].min_len = UBIFS_SIG_NODE_SZ;
+	c->ranges[UBIFS_SIG_NODE].max_len = c->leb_size - UBIFS_SB_NODE_SZ;
 
 	c->ranges[UBIFS_INO_NODE].min_len  = UBIFS_INO_NODE_SZ;
 	c->ranges[UBIFS_INO_NODE].max_len  = UBIFS_MAX_INO_NODE_SZ;
@@ -1059,6 +1045,8 @@ static int ubifs_parse_options(struct ubifs_info *c, char *options,
 				c->mount_opts.compr_type = UBIFS_COMPR_LZO;
 			else if (!strcmp(name, "zlib"))
 				c->mount_opts.compr_type = UBIFS_COMPR_ZLIB;
+			else if (!strcmp(name, "zstd"))
+				c->mount_opts.compr_type = UBIFS_COMPR_ZSTD;
 			else {
 				ubifs_err(c, "unknown compressor \"%s\"", name); //FIXME: is c ready?
 				kfree(name);
@@ -1312,8 +1300,7 @@ static int mount_ubifs(struct ubifs_info *c)
 	if (err)
 		goto out_free;
 
-	sz = ALIGN(c->max_idx_node_sz, c->min_io_size);
-	sz = ALIGN(sz + c->max_idx_node_sz, c->min_io_size);
+	sz = ALIGN(c->max_idx_node_sz, c->min_io_size) * 2;
 	c->cbuf = kmalloc(sz, GFP_NOFS);
 	if (!c->cbuf) {
 		err = -ENOMEM;
@@ -1376,6 +1363,26 @@ static int mount_ubifs(struct ubifs_info *c)
 			goto out_lpt;
 	}
 
+	/*
+	 * Handle offline signed images: Now that the master node is
+	 * written and its validation no longer depends on the hash
+	 * in the superblock, we can update the offline signed
+	 * superblock with a HMAC version,
+	 */
+	if (ubifs_authenticated(c) && ubifs_hmac_zero(c, c->sup_node->hmac)) {
+		err = ubifs_hmac_wkm(c, c->sup_node->hmac_wkm);
+		if (err)
+			goto out_lpt;
+		c->superblock_need_write = 1;
+	}
+
+	if (!c->ro_mount && c->superblock_need_write) {
+		err = ubifs_write_sb_node(c, c->sup_node);
+		if (err)
+			goto out_lpt;
+		c->superblock_need_write = 0;
+	}
+
 	err = dbg_check_idx_size(c, c->bi.old_idx_sz);
 	if (err)
 		goto out_lpt;
@@ -1481,9 +1488,7 @@ static int mount_ubifs(struct ubifs_info *c)
 	if (err)
 		goto out_infos;
 
-	err = dbg_debugfs_init_fs(c);
-	if (err)
-		goto out_infos;
+	dbg_debugfs_init_fs(c);
 
 	c->mounting = 0;
 
@@ -1550,6 +1555,8 @@ static int mount_ubifs(struct ubifs_info *c)
 		c->bud_bytes, c->bud_bytes >> 10, c->bud_bytes >> 20);
 	dbg_gen("max. seq. number:    %llu", c->max_sqnum);
 	dbg_gen("commit number:       %llu", c->cmt_no);
+	dbg_gen("max. xattrs per inode: %d", ubifs_xattr_max_cnt(c));
+	dbg_gen("max orphans:           %d", c->max_orphans);
 
 	return 0;
 
@@ -1658,15 +1665,6 @@ static int ubifs_remount_rw(struct ubifs_info *c)
 	if (err)
 		goto out;
 
-	if (c->old_leb_cnt != c->leb_cnt) {
-		struct ubifs_sb_node *sup = c->sup_node;
-
-		sup->leb_cnt = cpu_to_le32(c->leb_cnt);
-		err = ubifs_write_sb_node(c, sup);
-		if (err)
-			goto out;
-	}
-
 	if (c->need_recovery) {
 		ubifs_msg(c, "completing deferred recovery");
 		err = ubifs_write_rcvrd_mst_node(c);
@@ -1698,6 +1696,16 @@ static int ubifs_remount_rw(struct ubifs_info *c)
 			goto out;
 	}
 
+	if (c->superblock_need_write) {
+		struct ubifs_sb_node *sup = c->sup_node;
+
+		err = ubifs_write_sb_node(c, sup);
+		if (err)
+			goto out;
+
+		c->superblock_need_write = 0;
+	}
+
 	c->ileb_buf = vmalloc(c->leb_size);
 	if (!c->ileb_buf) {
 		err = -ENOMEM;
@@ -1979,7 +1987,7 @@ static int ubifs_remount_fs(struct super_block *sb, int *flags, char *data)
 
 const struct super_operations ubifs_super_operations = {
 	.alloc_inode   = ubifs_alloc_inode,
-	.destroy_inode = ubifs_destroy_inode,
+	.free_inode    = ubifs_free_inode,
 	.put_super     = ubifs_put_super,
 	.write_inode   = ubifs_write_inode,
 	.evict_inode   = ubifs_evict_inode,
@@ -2146,9 +2154,7 @@ static int ubifs_fill_super(struct super_block *sb, void *data, int silent)
 #ifdef CONFIG_UBIFS_FS_XATTR
 	sb->s_xattr = ubifs_xattr_handlers;
 #endif
-#ifdef CONFIG_UBIFS_FS_ENCRYPTION
-	sb->s_cop = &ubifs_crypt_operations;
-#endif
+	fscrypt_set_ops(sb, &ubifs_crypt_operations);
 
 	mutex_lock(&c->umount_mutex);
 	err = mount_ubifs(c);
@@ -2250,11 +2256,10 @@ static struct dentry *ubifs_mount(struct file_system_type *fs_type, int flags,
 			goto out_deact;
 		/* We do not support atime */
 		sb->s_flags |= SB_ACTIVE;
-#ifndef CONFIG_UBIFS_ATIME_SUPPORT
-		sb->s_flags |= SB_NOATIME;
-#else
-		ubifs_msg(c, "full atime support is enabled.");
-#endif
+		if (IS_ENABLED(CONFIG_UBIFS_ATIME_SUPPORT))
+			ubifs_msg(c, "full atime support is enabled.");
+		else
+			sb->s_flags |= SB_NOATIME;
 	}
 
 	/* 'fill_super()' opens ubi again so we must close it here */
@@ -2369,9 +2374,7 @@ static int __init ubifs_init(void)
 	if (err)
 		goto out_shrinker;
 
-	err = dbg_debugfs_init();
-	if (err)
-		goto out_compr;
+	dbg_debugfs_init();
 
 	err = register_filesystem(&ubifs_fs_type);
 	if (err) {
@@ -2383,7 +2386,6 @@ static int __init ubifs_init(void)
 
 out_dbg:
 	dbg_debugfs_exit();
-out_compr:
 	ubifs_compressors_exit();
 out_shrinker:
 	unregister_shrinker(&ubifs_shrinker_info);
diff --git a/fs/ubifs/tnc.c b/fs/ubifs/tnc.c
index 25572ffea163..e8e7b0e9532e 100644
--- a/fs/ubifs/tnc.c
+++ b/fs/ubifs/tnc.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
@@ -479,14 +467,13 @@ static int try_read_node(const struct ubifs_info *c, void *buf, int type,
 	if (node_len != len)
 		return 0;
 
-	if (type == UBIFS_DATA_NODE && c->no_chk_data_crc && !c->mounting &&
-	    !c->remounting_rw)
-		return 1;
-
-	crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8);
-	node_crc = le32_to_cpu(ch->crc);
-	if (crc != node_crc)
-		return 0;
+	if (type != UBIFS_DATA_NODE || !c->no_chk_data_crc || c->mounting ||
+	    c->remounting_rw) {
+		crc = crc32(UBIFS_CRC32_INIT, buf + 8, node_len - 8);
+		node_crc = le32_to_cpu(ch->crc);
+		if (crc != node_crc)
+			return 0;
+	}
 
 	err = ubifs_node_check_hash(c, buf, zbr->hash);
 	if (err) {
@@ -1171,8 +1158,8 @@ static struct ubifs_znode *dirty_cow_bottom_up(struct ubifs_info *c,
  *   o exact match, i.e. the found zero-level znode contains key @key, then %1
  *     is returned and slot number of the matched branch is stored in @n;
  *   o not exact match, which means that zero-level znode does not contain
- *     @key, then %0 is returned and slot number of the closest branch is stored
- *     in @n;
+ *     @key, then %0 is returned and slot number of the closest branch or %-1
+ *     is stored in @n; In this case calling tnc_next() is mandatory.
  *   o @key is so small that it is even less than the lowest key of the
  *     leftmost zero-level node, then %0 is returned and %0 is stored in @n.
  *
@@ -1895,13 +1882,19 @@ int ubifs_tnc_lookup_nm(struct ubifs_info *c, const union ubifs_key *key,
 
 static int search_dh_cookie(struct ubifs_info *c, const union ubifs_key *key,
 			    struct ubifs_dent_node *dent, uint32_t cookie,
-			    struct ubifs_znode **zn, int *n)
+			    struct ubifs_znode **zn, int *n, int exact)
 {
 	int err;
 	struct ubifs_znode *znode = *zn;
 	struct ubifs_zbranch *zbr;
 	union ubifs_key *dkey;
 
+	if (!exact) {
+		err = tnc_next(c, &znode, n);
+		if (err)
+			return err;
+	}
+
 	for (;;) {
 		zbr = &znode->zbranch[*n];
 		dkey = &zbr->key;
@@ -1943,7 +1936,7 @@ static int do_lookup_dh(struct ubifs_info *c, const union ubifs_key *key,
 	if (unlikely(err < 0))
 		goto out_unlock;
 
-	err = search_dh_cookie(c, key, dent, cookie, &znode, &n);
+	err = search_dh_cookie(c, key, dent, cookie, &znode, &n, err);
 
 out_unlock:
 	mutex_unlock(&c->tnc_mutex);
@@ -2736,7 +2729,7 @@ int ubifs_tnc_remove_dh(struct ubifs_info *c, const union ubifs_key *key,
 		if (unlikely(err < 0))
 			goto out_free;
 
-		err = search_dh_cookie(c, key, dent, cookie, &znode, &n);
+		err = search_dh_cookie(c, key, dent, cookie, &znode, &n, err);
 		if (err)
 			goto out_free;
 	}
diff --git a/fs/ubifs/tnc_commit.c b/fs/ubifs/tnc_commit.c
index dbcd2c350b65..a384a0f9ff32 100644
--- a/fs/ubifs/tnc_commit.c
+++ b/fs/ubifs/tnc_commit.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
diff --git a/fs/ubifs/tnc_misc.c b/fs/ubifs/tnc_misc.c
index d1815e959007..6f293f662d98 100644
--- a/fs/ubifs/tnc_misc.c
+++ b/fs/ubifs/tnc_misc.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Adrian Hunter
  *          Artem Bityutskiy (Битюцкий Артём)
  */
diff --git a/fs/ubifs/ubifs-media.h b/fs/ubifs/ubifs-media.h
index 8b7c1844014f..3c9792cbb6ff 100644
--- a/fs/ubifs/ubifs-media.h
+++ b/fs/ubifs/ubifs-media.h
@@ -1,21 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -287,6 +275,8 @@ enum {
 #define UBIFS_CS_NODE_SZ   sizeof(struct ubifs_cs_node)
 #define UBIFS_ORPH_NODE_SZ sizeof(struct ubifs_orph_node)
 #define UBIFS_AUTH_NODE_SZ sizeof(struct ubifs_auth_node)
+#define UBIFS_SIG_NODE_SZ  sizeof(struct ubifs_sig_node)
+
 /* Extended attribute entry nodes are identical to directory entry nodes */
 #define UBIFS_XENT_NODE_SZ UBIFS_DENT_NODE_SZ
 /* Only this does not have to be multiple of 8 bytes */
@@ -313,6 +303,8 @@ enum {
  */
 #define UBIFS_XATTR_NAME_ENCRYPTION_CONTEXT "c"
 
+/* Type field in ubifs_sig_node */
+#define UBIFS_SIGNATURE_TYPE_PKCS7	1
 
 /*
  * On-flash inode flags.
@@ -348,12 +340,14 @@ enum {
  * UBIFS_COMPR_NONE: no compression
  * UBIFS_COMPR_LZO: LZO compression
  * UBIFS_COMPR_ZLIB: ZLIB compression
+ * UBIFS_COMPR_ZSTD: ZSTD compression
  * UBIFS_COMPR_TYPES_CNT: count of supported compression types
  */
 enum {
 	UBIFS_COMPR_NONE,
 	UBIFS_COMPR_LZO,
 	UBIFS_COMPR_ZLIB,
+	UBIFS_COMPR_ZSTD,
 	UBIFS_COMPR_TYPES_CNT,
 };
 
@@ -373,6 +367,7 @@ enum {
  * UBIFS_CS_NODE: commit start node
  * UBIFS_ORPH_NODE: orphan node
  * UBIFS_AUTH_NODE: authentication node
+ * UBIFS_SIG_NODE: signature node
  * UBIFS_NODE_TYPES_CNT: count of supported node types
  *
  * Note, we index arrays by these numbers, so keep them low and contiguous.
@@ -393,6 +388,7 @@ enum {
 	UBIFS_CS_NODE,
 	UBIFS_ORPH_NODE,
 	UBIFS_AUTH_NODE,
+	UBIFS_SIG_NODE,
 	UBIFS_NODE_TYPES_CNT,
 };
 
@@ -650,6 +646,8 @@ struct ubifs_pad_node {
  * @hmac_wkm: HMAC of a well known message (the string "UBIFS") as a convenience
  *            to the user to check if the correct key is passed.
  * @hash_algo: The hash algo used for this filesystem (one of enum hash_algo)
+ * @hash_mst: hash of the master node, only valid for signed images in which the
+ *            master node does not contain a hmac
  */
 struct ubifs_sb_node {
 	struct ubifs_ch ch;
@@ -680,7 +678,8 @@ struct ubifs_sb_node {
 	__u8 hmac[UBIFS_MAX_HMAC_LEN];
 	__u8 hmac_wkm[UBIFS_MAX_HMAC_LEN];
 	__le16 hash_algo;
-	__u8 padding2[3838];
+	__u8 hash_mst[UBIFS_MAX_HASH_LEN];
+	__u8 padding2[3774];
 } __packed;
 
 /**
@@ -783,6 +782,23 @@ struct ubifs_auth_node {
 } __packed;
 
 /**
+ * struct ubifs_sig_node - node for signing other nodes
+ * @ch: common header
+ * @type: type of the signature, currently only UBIFS_SIGNATURE_TYPE_PKCS7
+ * supported
+ * @len: The length of the signature data
+ * @padding: reserved for future, zeroes
+ * @sig: The signature data
+ */
+struct ubifs_sig_node {
+	struct ubifs_ch ch;
+	__le32 type;
+	__le32 len;
+	__u8 padding[32];
+	__u8 sig[];
+} __packed;
+
+/**
  * struct ubifs_branch - key/reference/length branch
  * @lnum: LEB number of the target node
  * @offs: offset within @lnum
diff --git a/fs/ubifs/ubifs.h b/fs/ubifs/ubifs.h
index 38401adaa00d..c55f212dcb75 100644
--- a/fs/ubifs/ubifs.h
+++ b/fs/ubifs/ubifs.h
@@ -1,21 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -43,7 +31,6 @@
 #include <crypto/hash.h>
 #include <crypto/algapi.h>
 
-#define __FS_HAS_ENCRYPTION IS_ENABLED(CONFIG_UBIFS_FS_ENCRYPTION)
 #include <linux/fscrypt.h>
 
 #include "ubifs-media.h"
@@ -142,7 +129,7 @@
  */
 #define WORST_COMPR_FACTOR 2
 
-#ifdef CONFIG_UBIFS_FS_ENCRYPTION
+#ifdef CONFIG_FS_ENCRYPTION
 #define UBIFS_CIPHER_BLOCK_SIZE FS_CRYPTO_BLOCK_SIZE
 #else
 #define UBIFS_CIPHER_BLOCK_SIZE 0
@@ -925,6 +912,8 @@ struct ubifs_budget_req {
  * @rb: rb-tree node of rb-tree of orphans sorted by inode number
  * @list: list head of list of orphans in order added
  * @new_list: list head of list of orphans added since the last commit
+ * @child_list: list of xattr childs if this orphan hosts xattrs, list head
+ * if this orphan is a xattr, not used otherwise.
  * @cnext: next orphan to commit
  * @dnext: next orphan to delete
  * @inum: inode number
@@ -936,6 +925,7 @@ struct ubifs_orphan {
 	struct rb_node rb;
 	struct list_head list;
 	struct list_head new_list;
+	struct list_head child_list;
 	struct ubifs_orphan *cnext;
 	struct ubifs_orphan *dnext;
 	ino_t inum;
@@ -1114,7 +1104,6 @@ struct ubifs_debug_info;
  *                used to store indexing nodes (@leb_size - @max_idx_node_sz)
  * @leb_cnt: count of logical eraseblocks
  * @max_leb_cnt: maximum count of logical eraseblocks
- * @old_leb_cnt: count of logical eraseblocks before re-size
  * @ro_media: the underlying UBI volume is read-only
  * @ro_mount: the file-system was mounted as read-only
  * @ro_error: UBIFS switched to R/O mode because an error happened
@@ -1305,6 +1294,7 @@ struct ubifs_info {
 	unsigned int rw_incompat:1;
 	unsigned int assert_action:2;
 	unsigned int authenticated:1;
+	unsigned int superblock_need_write:1;
 
 	struct mutex tnc_mutex;
 	struct ubifs_zbranch zroot;
@@ -1362,7 +1352,6 @@ struct ubifs_info {
 	int idx_leb_size;
 	int leb_cnt;
 	int max_leb_cnt;
-	int old_leb_cnt;
 	unsigned int ro_media:1;
 	unsigned int ro_mount:1;
 	unsigned int ro_error:1;
@@ -1690,6 +1679,9 @@ static inline int ubifs_auth_node_sz(const struct ubifs_info *c)
 	else
 		return 0;
 }
+int ubifs_sb_verify_signature(struct ubifs_info *c,
+			      const struct ubifs_sb_node *sup);
+bool ubifs_hmac_zero(struct ubifs_info *c, const u8 *hmac);
 
 int ubifs_hmac_wkm(struct ubifs_info *c, u8 *hmac);
 
@@ -1997,9 +1989,7 @@ int ubifs_calc_dark(const struct ubifs_info *c, int spc);
 /* file.c */
 int ubifs_fsync(struct file *file, loff_t start, loff_t end, int datasync);
 int ubifs_setattr(struct dentry *dentry, struct iattr *attr);
-#ifdef CONFIG_UBIFS_ATIME_SUPPORT
 int ubifs_update_time(struct inode *inode, struct timespec64 *time, int flags);
-#endif
 
 /* dir.c */
 struct inode *ubifs_new_inode(struct ubifs_info *c, struct inode *dir,
@@ -2018,9 +2008,14 @@ ssize_t ubifs_xattr_get(struct inode *host, const char *name, void *buf,
 
 #ifdef CONFIG_UBIFS_FS_XATTR
 void ubifs_evict_xattr_inode(struct ubifs_info *c, ino_t xattr_inum);
+int ubifs_purge_xattrs(struct inode *host);
 #else
 static inline void ubifs_evict_xattr_inode(struct ubifs_info *c,
 					   ino_t xattr_inum) { }
+static inline int ubifs_purge_xattrs(struct inode *host)
+{
+	return 0;
+}
 #endif
 
 #ifdef CONFIG_UBIFS_FS_SECURITY
@@ -2072,7 +2067,7 @@ int ubifs_decompress(const struct ubifs_info *c, const void *buf, int len,
 #include "misc.h"
 #include "key.h"
 
-#ifndef CONFIG_UBIFS_FS_ENCRYPTION
+#ifndef CONFIG_FS_ENCRYPTION
 static inline int ubifs_encrypt(const struct inode *inode,
 				struct ubifs_data_node *dn,
 				unsigned int in_len, unsigned int *out_len,
diff --git a/fs/ubifs/xattr.c b/fs/ubifs/xattr.c
index f5ad1ede7990..9aefbb60074f 100644
--- a/fs/ubifs/xattr.c
+++ b/fs/ubifs/xattr.c
@@ -1,21 +1,9 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  * This file is part of UBIFS.
  *
  * Copyright (C) 2006-2008 Nokia Corporation.
  *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License version 2 as published by
- * the Free Software Foundation.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 51
- * Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
- *
  * Authors: Artem Bityutskiy (Битюцкий Артём)
  *          Adrian Hunter
  */
@@ -61,12 +49,6 @@
 #include <linux/xattr.h>
 
 /*
- * Limit the number of extended attributes per inode so that the total size
- * (@xattr_size) is guaranteeded to fit in an 'unsigned int'.
- */
-#define MAX_XATTRS_PER_INODE 65535
-
-/*
  * Extended attribute type constants.
  *
  * USER_XATTR: user extended attribute ("user.*")
@@ -106,7 +88,7 @@ static int create_xattr(struct ubifs_info *c, struct inode *host,
 				.new_ino_d = ALIGN(size, 8), .dirtied_ino = 1,
 				.dirtied_ino_d = ALIGN(host_ui->data_len, 8) };
 
-	if (host_ui->xattr_cnt >= MAX_XATTRS_PER_INODE) {
+	if (host_ui->xattr_cnt >= ubifs_xattr_max_cnt(c)) {
 		ubifs_err(c, "inode %lu already has too many xattrs (%d), cannot create more",
 			  host->i_ino, host_ui->xattr_cnt);
 		return -ENOSPC;
@@ -507,6 +489,69 @@ out_cancel:
 	return err;
 }
 
+int ubifs_purge_xattrs(struct inode *host)
+{
+	union ubifs_key key;
+	struct ubifs_info *c = host->i_sb->s_fs_info;
+	struct ubifs_dent_node *xent, *pxent = NULL;
+	struct inode *xino;
+	struct fscrypt_name nm = {0};
+	int err;
+
+	if (ubifs_inode(host)->xattr_cnt < ubifs_xattr_max_cnt(c))
+		return 0;
+
+	ubifs_warn(c, "inode %lu has too many xattrs, doing a non-atomic deletion",
+		   host->i_ino);
+
+	lowest_xent_key(c, &key, host->i_ino);
+	while (1) {
+		xent = ubifs_tnc_next_ent(c, &key, &nm);
+		if (IS_ERR(xent)) {
+			err = PTR_ERR(xent);
+			break;
+		}
+
+		fname_name(&nm) = xent->name;
+		fname_len(&nm) = le16_to_cpu(xent->nlen);
+
+		xino = ubifs_iget(c->vfs_sb, le64_to_cpu(xent->inum));
+		if (IS_ERR(xino)) {
+			err = PTR_ERR(xino);
+			ubifs_err(c, "dead directory entry '%s', error %d",
+				  xent->name, err);
+			ubifs_ro_mode(c, err);
+			kfree(pxent);
+			return err;
+		}
+
+		ubifs_assert(c, ubifs_inode(xino)->xattr);
+
+		clear_nlink(xino);
+		err = remove_xattr(c, host, xino, &nm);
+		if (err) {
+			kfree(pxent);
+			iput(xino);
+			ubifs_err(c, "cannot remove xattr, error %d", err);
+			return err;
+		}
+
+		iput(xino);
+
+		kfree(pxent);
+		pxent = xent;
+		key_read(c, &xent->key, &key);
+	}
+
+	kfree(pxent);
+	if (err != -ENOENT) {
+		ubifs_err(c, "cannot find next direntry, error %d", err);
+		return err;
+	}
+
+	return 0;
+}
+
 /**
  * ubifs_evict_xattr_inode - Evict an xattr inode.
  * @c: UBIFS file-system description object
diff --git a/fs/udf/Kconfig b/fs/udf/Kconfig
index aa415054ad0a..6848de581ce1 100644
--- a/fs/udf/Kconfig
+++ b/fs/udf/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config UDF_FS
 	tristate "UDF file system support"
 	select CRC_ITU_T
diff --git a/fs/udf/Makefile b/fs/udf/Makefile
index eb880f66c23a..63981cd333e3 100644
--- a/fs/udf/Makefile
+++ b/fs/udf/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the linux udf-filesystem routines.
 #
diff --git a/fs/udf/inode.c b/fs/udf/inode.c
index ae796e10f68b..9bb18311a22f 100644
--- a/fs/udf/inode.c
+++ b/fs/udf/inode.c
@@ -470,13 +470,15 @@ static struct buffer_head *udf_getblk(struct inode *inode, udf_pblk_t block,
 	return NULL;
 }
 
-/* Extend the file by 'blocks' blocks, return the number of extents added */
+/* Extend the file with new blocks totaling 'new_block_bytes',
+ * return the number of extents added
+ */
 static int udf_do_extend_file(struct inode *inode,
 			      struct extent_position *last_pos,
 			      struct kernel_long_ad *last_ext,
-			      sector_t blocks)
+			      loff_t new_block_bytes)
 {
-	sector_t add;
+	uint32_t add;
 	int count = 0, fake = !(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
 	struct super_block *sb = inode->i_sb;
 	struct kernel_lb_addr prealloc_loc = {};
@@ -486,7 +488,7 @@ static int udf_do_extend_file(struct inode *inode,
 
 	/* The previous extent is fake and we should not extend by anything
 	 * - there's nothing to do... */
-	if (!blocks && fake)
+	if (!new_block_bytes && fake)
 		return 0;
 
 	iinfo = UDF_I(inode);
@@ -517,13 +519,12 @@ static int udf_do_extend_file(struct inode *inode,
 	/* Can we merge with the previous extent? */
 	if ((last_ext->extLength & UDF_EXTENT_FLAG_MASK) ==
 					EXT_NOT_RECORDED_NOT_ALLOCATED) {
-		add = ((1 << 30) - sb->s_blocksize -
-			(last_ext->extLength & UDF_EXTENT_LENGTH_MASK)) >>
-			sb->s_blocksize_bits;
-		if (add > blocks)
-			add = blocks;
-		blocks -= add;
-		last_ext->extLength += add << sb->s_blocksize_bits;
+		add = (1 << 30) - sb->s_blocksize -
+			(last_ext->extLength & UDF_EXTENT_LENGTH_MASK);
+		if (add > new_block_bytes)
+			add = new_block_bytes;
+		new_block_bytes -= add;
+		last_ext->extLength += add;
 	}
 
 	if (fake) {
@@ -544,28 +545,27 @@ static int udf_do_extend_file(struct inode *inode,
 	}
 
 	/* Managed to do everything necessary? */
-	if (!blocks)
+	if (!new_block_bytes)
 		goto out;
 
 	/* All further extents will be NOT_RECORDED_NOT_ALLOCATED */
 	last_ext->extLocation.logicalBlockNum = 0;
 	last_ext->extLocation.partitionReferenceNum = 0;
-	add = (1 << (30-sb->s_blocksize_bits)) - 1;
-	last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
-				(add << sb->s_blocksize_bits);
+	add = (1 << 30) - sb->s_blocksize;
+	last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED | add;
 
 	/* Create enough extents to cover the whole hole */
-	while (blocks > add) {
-		blocks -= add;
+	while (new_block_bytes > add) {
+		new_block_bytes -= add;
 		err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
 				   last_ext->extLength, 1);
 		if (err)
 			return err;
 		count++;
 	}
-	if (blocks) {
+	if (new_block_bytes) {
 		last_ext->extLength = EXT_NOT_RECORDED_NOT_ALLOCATED |
-			(blocks << sb->s_blocksize_bits);
+			new_block_bytes;
 		err = udf_add_aext(inode, last_pos, &last_ext->extLocation,
 				   last_ext->extLength, 1);
 		if (err)
@@ -596,6 +596,24 @@ out:
 	return count;
 }
 
+/* Extend the final block of the file to final_block_len bytes */
+static void udf_do_extend_final_block(struct inode *inode,
+				      struct extent_position *last_pos,
+				      struct kernel_long_ad *last_ext,
+				      uint32_t final_block_len)
+{
+	struct super_block *sb = inode->i_sb;
+	uint32_t added_bytes;
+
+	added_bytes = final_block_len -
+		      (last_ext->extLength & (sb->s_blocksize - 1));
+	last_ext->extLength += added_bytes;
+	UDF_I(inode)->i_lenExtents += added_bytes;
+
+	udf_write_aext(inode, last_pos, &last_ext->extLocation,
+			last_ext->extLength, 1);
+}
+
 static int udf_extend_file(struct inode *inode, loff_t newsize)
 {
 
@@ -605,10 +623,12 @@ static int udf_extend_file(struct inode *inode, loff_t newsize)
 	int8_t etype;
 	struct super_block *sb = inode->i_sb;
 	sector_t first_block = newsize >> sb->s_blocksize_bits, offset;
+	unsigned long partial_final_block;
 	int adsize;
 	struct udf_inode_info *iinfo = UDF_I(inode);
 	struct kernel_long_ad extent;
-	int err;
+	int err = 0;
+	int within_final_block;
 
 	if (iinfo->i_alloc_type == ICBTAG_FLAG_AD_SHORT)
 		adsize = sizeof(struct short_ad);
@@ -618,18 +638,8 @@ static int udf_extend_file(struct inode *inode, loff_t newsize)
 		BUG();
 
 	etype = inode_bmap(inode, first_block, &epos, &eloc, &elen, &offset);
+	within_final_block = (etype != -1);
 
-	/* File has extent covering the new size (could happen when extending
-	 * inside a block)? */
-	if (etype != -1)
-		return 0;
-	if (newsize & (sb->s_blocksize - 1))
-		offset++;
-	/* Extended file just to the boundary of the last file block? */
-	if (offset == 0)
-		return 0;
-
-	/* Truncate is extending the file by 'offset' blocks */
 	if ((!epos.bh && epos.offset == udf_file_entry_alloc_offset(inode)) ||
 	    (epos.bh && epos.offset == sizeof(struct allocExtDesc))) {
 		/* File has no extents at all or has empty last
@@ -643,7 +653,22 @@ static int udf_extend_file(struct inode *inode, loff_t newsize)
 				      &extent.extLength, 0);
 		extent.extLength |= etype << 30;
 	}
-	err = udf_do_extend_file(inode, &epos, &extent, offset);
+
+	partial_final_block = newsize & (sb->s_blocksize - 1);
+
+	/* File has extent covering the new size (could happen when extending
+	 * inside a block)?
+	 */
+	if (within_final_block) {
+		/* Extending file within the last file block */
+		udf_do_extend_final_block(inode, &epos, &extent,
+					  partial_final_block);
+	} else {
+		loff_t add = ((loff_t)offset << sb->s_blocksize_bits) |
+			     partial_final_block;
+		err = udf_do_extend_file(inode, &epos, &extent, add);
+	}
+
 	if (err < 0)
 		goto out;
 	err = 0;
@@ -745,6 +770,7 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
 	/* Are we beyond EOF? */
 	if (etype == -1) {
 		int ret;
+		loff_t hole_len;
 		isBeyondEOF = true;
 		if (count) {
 			if (c)
@@ -760,7 +786,8 @@ static sector_t inode_getblk(struct inode *inode, sector_t block,
 			startnum = (offset > 0);
 		}
 		/* Create extents for the hole between EOF and offset */
-		ret = udf_do_extend_file(inode, &prev_epos, laarr, offset);
+		hole_len = (loff_t)offset << inode->i_blkbits;
+		ret = udf_do_extend_file(inode, &prev_epos, laarr, hole_len);
 		if (ret < 0) {
 			*err = ret;
 			newblock = 0;
@@ -1242,8 +1269,10 @@ set_size:
 		truncate_setsize(inode, newsize);
 		down_write(&iinfo->i_data_sem);
 		udf_clear_extent_cache(inode);
-		udf_truncate_extents(inode);
+		err = udf_truncate_extents(inode);
 		up_write(&iinfo->i_data_sem);
+		if (err)
+			return err;
 	}
 update_time:
 	inode->i_mtime = inode->i_ctime = current_time(inode);
diff --git a/fs/udf/namei.c b/fs/udf/namei.c
index 58cc2414992b..77b6d89b9bcd 100644
--- a/fs/udf/namei.c
+++ b/fs/udf/namei.c
@@ -304,21 +304,6 @@ static struct dentry *udf_lookup(struct inode *dir, struct dentry *dentry,
 	if (dentry->d_name.len > UDF_NAME_LEN)
 		return ERR_PTR(-ENAMETOOLONG);
 
-#ifdef UDF_RECOVERY
-	/* temporary shorthand for specifying files by inode number */
-	if (!strncmp(dentry->d_name.name, ".B=", 3)) {
-		struct kernel_lb_addr lb = {
-			.logicalBlockNum = 0,
-			.partitionReferenceNum =
-				simple_strtoul(dentry->d_name.name + 3,
-						NULL, 0),
-		};
-		inode = udf_iget(dir->i_sb, lb);
-		if (IS_ERR(inode))
-			return inode;
-	} else
-#endif /* UDF_RECOVERY */
-
 	fi = udf_find_entry(dir, &dentry->d_name, &fibh, &cfi);
 	if (IS_ERR(fi))
 		return ERR_CAST(fi);
diff --git a/fs/udf/super.c b/fs/udf/super.c
index e3d684ea3203..a14346137361 100644
--- a/fs/udf/super.c
+++ b/fs/udf/super.c
@@ -161,17 +161,11 @@ static struct inode *udf_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void udf_i_callback(struct rcu_head *head)
+static void udf_free_in_core_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(udf_inode_cachep, UDF_I(inode));
 }
 
-static void udf_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, udf_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct udf_inode_info *ei = (struct udf_inode_info *)foo;
@@ -206,7 +200,7 @@ static void destroy_inodecache(void)
 /* Superblock operations */
 static const struct super_operations udf_sb_ops = {
 	.alloc_inode	= udf_alloc_inode,
-	.destroy_inode	= udf_destroy_inode,
+	.free_inode	= udf_free_in_core_inode,
 	.write_inode	= udf_write_inode,
 	.evict_inode	= udf_evict_inode,
 	.put_super	= udf_put_super,
@@ -572,6 +566,11 @@ static int udf_parse_options(char *options, struct udf_options *uopt,
 			if (!remount) {
 				if (uopt->nls_map)
 					unload_nls(uopt->nls_map);
+				/*
+				 * load_nls() failure is handled later in
+				 * udf_fill_super() after all options are
+				 * parsed.
+				 */
 				uopt->nls_map = load_nls(args[0].from);
 				uopt->flags |= (1 << UDF_FLAG_NLS_MAP);
 			}
@@ -1474,6 +1473,17 @@ static int udf_load_logicalvol(struct super_block *sb, sector_t block,
 	if (lvd->integritySeqExt.extLength)
 		udf_load_logicalvolint(sb, leea_to_cpu(lvd->integritySeqExt));
 	ret = 0;
+
+	if (!sbi->s_lvid_bh) {
+		/* We can't generate unique IDs without a valid LVID */
+		if (sb_rdonly(sb)) {
+			UDF_SET_FLAG(sb, UDF_FLAG_RW_INCOMPAT);
+		} else {
+			udf_warn(sb, "Damaged or missing LVID, forcing "
+				     "readonly mount\n");
+			ret = -EACCES;
+		}
+	}
 out_bh:
 	brelse(bh);
 	return ret;
@@ -1943,13 +1953,24 @@ static int udf_load_vrs(struct super_block *sb, struct udf_options *uopt,
 	return 0;
 }
 
+static void udf_finalize_lvid(struct logicalVolIntegrityDesc *lvid)
+{
+	struct timespec64 ts;
+
+	ktime_get_real_ts64(&ts);
+	udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
+	lvid->descTag.descCRC = cpu_to_le16(
+		crc_itu_t(0, (char *)lvid + sizeof(struct tag),
+			le16_to_cpu(lvid->descTag.descCRCLength)));
+	lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
+}
+
 static void udf_open_lvid(struct super_block *sb)
 {
 	struct udf_sb_info *sbi = UDF_SB(sb);
 	struct buffer_head *bh = sbi->s_lvid_bh;
 	struct logicalVolIntegrityDesc *lvid;
 	struct logicalVolIntegrityDescImpUse *lvidiu;
-	struct timespec64 ts;
 
 	if (!bh)
 		return;
@@ -1961,18 +1982,12 @@ static void udf_open_lvid(struct super_block *sb)
 	mutex_lock(&sbi->s_alloc_mutex);
 	lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
 	lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
-	ktime_get_real_ts64(&ts);
-	udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
 	if (le32_to_cpu(lvid->integrityType) == LVID_INTEGRITY_TYPE_CLOSE)
 		lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_OPEN);
 	else
 		UDF_SET_FLAG(sb, UDF_FLAG_INCONSISTENT);
 
-	lvid->descTag.descCRC = cpu_to_le16(
-		crc_itu_t(0, (char *)lvid + sizeof(struct tag),
-			le16_to_cpu(lvid->descTag.descCRCLength)));
-
-	lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
+	udf_finalize_lvid(lvid);
 	mark_buffer_dirty(bh);
 	sbi->s_lvid_dirty = 0;
 	mutex_unlock(&sbi->s_alloc_mutex);
@@ -1986,7 +2001,6 @@ static void udf_close_lvid(struct super_block *sb)
 	struct buffer_head *bh = sbi->s_lvid_bh;
 	struct logicalVolIntegrityDesc *lvid;
 	struct logicalVolIntegrityDescImpUse *lvidiu;
-	struct timespec64 ts;
 
 	if (!bh)
 		return;
@@ -1998,8 +2012,6 @@ static void udf_close_lvid(struct super_block *sb)
 	mutex_lock(&sbi->s_alloc_mutex);
 	lvidiu->impIdent.identSuffix[0] = UDF_OS_CLASS_UNIX;
 	lvidiu->impIdent.identSuffix[1] = UDF_OS_ID_LINUX;
-	ktime_get_real_ts64(&ts);
-	udf_time_to_disk_stamp(&lvid->recordingDateAndTime, ts);
 	if (UDF_MAX_WRITE_VERSION > le16_to_cpu(lvidiu->maxUDFWriteRev))
 		lvidiu->maxUDFWriteRev = cpu_to_le16(UDF_MAX_WRITE_VERSION);
 	if (sbi->s_udfrev > le16_to_cpu(lvidiu->minUDFReadRev))
@@ -2009,17 +2021,13 @@ static void udf_close_lvid(struct super_block *sb)
 	if (!UDF_QUERY_FLAG(sb, UDF_FLAG_INCONSISTENT))
 		lvid->integrityType = cpu_to_le32(LVID_INTEGRITY_TYPE_CLOSE);
 
-	lvid->descTag.descCRC = cpu_to_le16(
-			crc_itu_t(0, (char *)lvid + sizeof(struct tag),
-				le16_to_cpu(lvid->descTag.descCRCLength)));
-
-	lvid->descTag.tagChecksum = udf_tag_checksum(&lvid->descTag);
 	/*
 	 * We set buffer uptodate unconditionally here to avoid spurious
 	 * warnings from mark_buffer_dirty() when previous EIO has marked
 	 * the buffer as !uptodate
 	 */
 	set_buffer_uptodate(bh);
+	udf_finalize_lvid(lvid);
 	mark_buffer_dirty(bh);
 	sbi->s_lvid_dirty = 0;
 	mutex_unlock(&sbi->s_alloc_mutex);
@@ -2048,8 +2056,8 @@ u64 lvid_get_unique_id(struct super_block *sb)
 	if (!(++uniqueID & 0xFFFFFFFF))
 		uniqueID += 16;
 	lvhd->uniqueID = cpu_to_le64(uniqueID);
+	udf_updated_lvid(sb);
 	mutex_unlock(&sbi->s_alloc_mutex);
-	mark_buffer_dirty(bh);
 
 	return ret;
 }
@@ -2320,11 +2328,17 @@ static int udf_sync_fs(struct super_block *sb, int wait)
 
 	mutex_lock(&sbi->s_alloc_mutex);
 	if (sbi->s_lvid_dirty) {
+		struct buffer_head *bh = sbi->s_lvid_bh;
+		struct logicalVolIntegrityDesc *lvid;
+
+		lvid = (struct logicalVolIntegrityDesc *)bh->b_data;
+		udf_finalize_lvid(lvid);
+
 		/*
 		 * Blockdevice will be synced later so we don't have to submit
 		 * the buffer for IO
 		 */
-		mark_buffer_dirty(sbi->s_lvid_bh);
+		mark_buffer_dirty(bh);
 		sbi->s_lvid_dirty = 0;
 	}
 	mutex_unlock(&sbi->s_alloc_mutex);
diff --git a/fs/udf/truncate.c b/fs/udf/truncate.c
index b647f0bd150c..63a47f1e1d52 100644
--- a/fs/udf/truncate.c
+++ b/fs/udf/truncate.c
@@ -199,7 +199,7 @@ static void udf_update_alloc_ext_desc(struct inode *inode,
  * for making file shorter. For making file longer, udf_extend_file() has to
  * be used.
  */
-void udf_truncate_extents(struct inode *inode)
+int udf_truncate_extents(struct inode *inode)
 {
 	struct extent_position epos;
 	struct kernel_lb_addr eloc, neloc = {};
@@ -224,7 +224,7 @@ void udf_truncate_extents(struct inode *inode)
 	if (etype == -1) {
 		/* We should extend the file? */
 		WARN_ON(byte_offset);
-		return;
+		return 0;
 	}
 	epos.offset -= adsize;
 	extent_trunc(inode, &epos, &eloc, etype, elen, byte_offset);
@@ -260,6 +260,9 @@ void udf_truncate_extents(struct inode *inode)
 			epos.block = eloc;
 			epos.bh = udf_tread(sb,
 					udf_get_lb_pblock(sb, &eloc, 0));
+			/* Error reading indirect block? */
+			if (!epos.bh)
+				return -EIO;
 			if (elen)
 				indirect_ext_len =
 					(elen + sb->s_blocksize - 1) >>
@@ -283,4 +286,5 @@ void udf_truncate_extents(struct inode *inode)
 	iinfo->i_lenExtents = inode->i_size;
 
 	brelse(epos.bh);
+	return 0;
 }
diff --git a/fs/udf/udfdecl.h b/fs/udf/udfdecl.h
index ee246769dee4..d89ef71887fc 100644
--- a/fs/udf/udfdecl.h
+++ b/fs/udf/udfdecl.h
@@ -235,7 +235,7 @@ extern struct inode *udf_new_inode(struct inode *, umode_t);
 /* truncate.c */
 extern void udf_truncate_tail_extent(struct inode *);
 extern void udf_discard_prealloc(struct inode *);
-extern void udf_truncate_extents(struct inode *);
+extern int udf_truncate_extents(struct inode *);
 
 /* balloc.c */
 extern void udf_free_blocks(struct super_block *, struct inode *,
diff --git a/fs/ufs/Kconfig b/fs/ufs/Kconfig
index 0bf6e16f8d79..fcb41516ea59 100644
--- a/fs/ufs/Kconfig
+++ b/fs/ufs/Kconfig
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config UFS_FS
 	tristate "UFS file system support (read only)"
 	depends on BLOCK
diff --git a/fs/ufs/Makefile b/fs/ufs/Makefile
index ec4a6b49fa13..042344c85be0 100644
--- a/fs/ufs/Makefile
+++ b/fs/ufs/Makefile
@@ -1,3 +1,4 @@
+# SPDX-License-Identifier: GPL-2.0-only
 #
 # Makefile for the Linux ufs filesystem routines.
 #
diff --git a/fs/ufs/super.c b/fs/ufs/super.c
index a4e07e910f1b..3d247c0d92aa 100644
--- a/fs/ufs/super.c
+++ b/fs/ufs/super.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  linux/fs/ufs/super.c
  *
@@ -1449,17 +1450,11 @@ static struct inode *ufs_alloc_inode(struct super_block *sb)
 	return &ei->vfs_inode;
 }
 
-static void ufs_i_callback(struct rcu_head *head)
+static void ufs_free_in_core_inode(struct inode *inode)
 {
-	struct inode *inode = container_of(head, struct inode, i_rcu);
 	kmem_cache_free(ufs_inode_cachep, UFS_I(inode));
 }
 
-static void ufs_destroy_inode(struct inode *inode)
-{
-	call_rcu(&inode->i_rcu, ufs_i_callback);
-}
-
 static void init_once(void *foo)
 {
 	struct ufs_inode_info *ei = (struct ufs_inode_info *) foo;
@@ -1494,7 +1489,7 @@ static void destroy_inodecache(void)
 
 static const struct super_operations ufs_super_ops = {
 	.alloc_inode	= ufs_alloc_inode,
-	.destroy_inode	= ufs_destroy_inode,
+	.free_inode	= ufs_free_in_core_inode,
 	.write_inode	= ufs_write_inode,
 	.evict_inode	= ufs_evict_inode,
 	.put_super	= ufs_put_super,
diff --git a/fs/ufs/util.h b/fs/ufs/util.h
index 1fd3011ea623..e1f1b2e868a7 100644
--- a/fs/ufs/util.h
+++ b/fs/ufs/util.h
@@ -42,7 +42,7 @@ ufs_get_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
 	case UFS_ST_SUNOS:
 		if (fs32_to_cpu(sb, usb3->fs_postblformat) == UFS_42POSTBLFMT)
 			return fs32_to_cpu(sb, usb1->fs_u0.fs_sun.fs_state);
-		/* Fall Through to UFS_ST_SUN */
+		/* Fall Through - to UFS_ST_SUN */
 	case UFS_ST_SUN:
 		return fs32_to_cpu(sb, usb3->fs_un2.fs_sun.fs_state);
 	case UFS_ST_SUNx86:
@@ -63,7 +63,7 @@ ufs_set_fs_state(struct super_block *sb, struct ufs_super_block_first *usb1,
 			usb1->fs_u0.fs_sun.fs_state = cpu_to_fs32(sb, value);
 			break;
 		}
-		/* Fall Through to UFS_ST_SUN */
+		/* Fall Through - to UFS_ST_SUN */
 	case UFS_ST_SUN:
 		usb3->fs_un2.fs_sun.fs_state = cpu_to_fs32(sb, value);
 		break;
@@ -229,7 +229,7 @@ ufs_get_inode_gid(struct super_block *sb, struct ufs_inode *inode)
 	case UFS_UID_44BSD:
 		return fs32_to_cpu(sb, inode->ui_u3.ui_44.ui_gid);
 	case UFS_UID_EFT:
-		if (inode->ui_u1.oldids.ui_suid == 0xFFFF)
+		if (inode->ui_u1.oldids.ui_sgid == 0xFFFF)
 			return fs32_to_cpu(sb, inode->ui_u3.ui_sun.ui_gid);
 		/* Fall through */
 	default:
diff --git a/fs/unicode/.gitignore b/fs/unicode/.gitignore
new file mode 100644
index 000000000000..0381e2221480
--- /dev/null
+++ b/fs/unicode/.gitignore
@@ -0,0 +1,2 @@
+mkutf8data
+utf8data.h
diff --git a/fs/unicode/Kconfig b/fs/unicode/Kconfig
new file mode 100644
index 000000000000..2c27b9a5cd6c
--- /dev/null
+++ b/fs/unicode/Kconfig
@@ -0,0 +1,14 @@
+# SPDX-License-Identifier: GPL-2.0-only
+#
+# UTF-8 normalization
+#
+config UNICODE
+	bool "UTF-8 normalization and casefolding support"
+	help
+	  Say Y here to enable UTF-8 NFD normalization and NFD+CF casefolding
+	  support.
+
+config UNICODE_NORMALIZATION_SELFTEST
+	tristate "Test UTF-8 normalization support"
+	depends on UNICODE
+	default n
diff --git a/fs/unicode/Makefile b/fs/unicode/Makefile
new file mode 100644
index 000000000000..d46e9baee285
--- /dev/null
+++ b/fs/unicode/Makefile
@@ -0,0 +1,38 @@
+# SPDX-License-Identifier: GPL-2.0
+
+obj-$(CONFIG_UNICODE) += unicode.o
+obj-$(CONFIG_UNICODE_NORMALIZATION_SELFTEST) += utf8-selftest.o
+
+unicode-y := utf8-norm.o utf8-core.o
+
+$(obj)/utf8-norm.o: $(obj)/utf8data.h
+
+# In the normal build, the checked-in utf8data.h is just shipped.
+#
+# To generate utf8data.h from UCD, put *.txt files in this directory
+# and pass REGENERATE_UTF8DATA=1 from the command line.
+ifdef REGENERATE_UTF8DATA
+
+quiet_cmd_utf8data = GEN     $@
+      cmd_utf8data = $< \
+		-a $(srctree)/$(src)/DerivedAge.txt \
+		-c $(srctree)/$(src)/DerivedCombiningClass.txt \
+		-p $(srctree)/$(src)/DerivedCoreProperties.txt \
+		-d $(srctree)/$(src)/UnicodeData.txt \
+		-f $(srctree)/$(src)/CaseFolding.txt \
+		-n $(srctree)/$(src)/NormalizationCorrections.txt \
+		-t $(srctree)/$(src)/NormalizationTest.txt \
+		-o $@
+
+$(obj)/utf8data.h: $(obj)/mkutf8data $(filter %.txt, $(cmd_utf8data)) FORCE
+	$(call if_changed,utf8data)
+
+else
+
+$(obj)/utf8data.h: $(src)/utf8data.h_shipped FORCE
+	$(call if_changed,shipped)
+
+endif
+
+targets += utf8data.h
+hostprogs-y += mkutf8data
diff --git a/fs/unicode/README.utf8data b/fs/unicode/README.utf8data
new file mode 100644
index 000000000000..c73786807d3b
--- /dev/null
+++ b/fs/unicode/README.utf8data
@@ -0,0 +1,57 @@
+The utf8data.h file in this directory is generated from the Unicode
+Character Database for version 12.1.0 of the Unicode standard.
+
+The full set of files can be found here:
+
+  http://www.unicode.org/Public/12.1.0/ucd/
+
+Individual source links:
+
+  https://www.unicode.org/Public/12.1.0/ucd/CaseFolding.txt
+  https://www.unicode.org/Public/12.1.0/ucd/DerivedAge.txt
+  https://www.unicode.org/Public/12.1.0/ucd/extracted/DerivedCombiningClass.txt
+  https://www.unicode.org/Public/12.1.0/ucd/DerivedCoreProperties.txt
+  https://www.unicode.org/Public/12.1.0/ucd/NormalizationCorrections.txt
+  https://www.unicode.org/Public/12.1.0/ucd/NormalizationTest.txt
+  https://www.unicode.org/Public/12.1.0/ucd/UnicodeData.txt
+
+md5sums (verify by running "md5sum -c README.utf8data"):
+
+  900e76da1d822a160fd6b8c0b1d70094  CaseFolding.txt
+  131256380bff4fea8ad4a851616f2f10  DerivedAge.txt
+  e731a4089b30002144e107e3d6f8d1fa  DerivedCombiningClass.txt
+  a47c9fbd7ff92a9b261ba9831e68778a  DerivedCoreProperties.txt
+  fcab6dad15e440879d92f315978f93d3  NormalizationCorrections.txt
+  f9ff1c55a60decf436100f791b44aa98  NormalizationTest.txt
+  755f6af699f8c8d2d958da411f78f6c6  UnicodeData.txt
+
+sha1sums (verify by running "sha1sum -c README.utf8data"):
+
+  dc9245f6803c4ac99555c361f5052e0b13eb779b  CaseFolding.txt
+  3281104f237184cdb5d869e86eb8573678ada7da  DerivedAge.txt
+  2f5f995ccb96e0fa84b15151b35d5e2681535175  DerivedCombiningClass.txt
+  5b8698a3fcd5018e1987f296b02e2c17e696415e  DerivedCoreProperties.txt
+  cd83935fbc012345d8792d2c704f69497e753835  NormalizationCorrections.txt
+  ea419aae505b337b0d99a83fa83fe58ddff7c19f  NormalizationTest.txt
+  dc973c0fc93d6f09d9ab9f70d1c9f89c447f0526  UnicodeData.txt
+
+
+To update to the newer version of the Unicode standard, the latest
+released version of the UCD can be found here:
+
+  http://www.unicode.org/Public/UCD/latest/
+
+Then, build under fs/unicode/ with REGENERATE_UTF8DATA=1:
+
+	make REGENERATE_UTF8DATA=1 fs/unicode/
+
+After sanity checking the newly generated utf8data.h file (the
+version generated from the 12.1.0 UCD should be 4,109 lines long, and
+have a total size of 324k) and/or comparing it with the older version
+of utf8data.h_shipped, rename it to utf8data.h_shipped.
+
+If you are a kernel developer updating to a newer version of the
+Unicode Character Database, please update this README.utf8data file
+with the version of the UCD that was used, the md5sum and sha1sums of
+the *.txt files, before checking in the new versions of the utf8data.h
+and README.utf8data files.
diff --git a/fs/unicode/mkutf8data.c b/fs/unicode/mkutf8data.c
new file mode 100644
index 000000000000..ff2025ac5a32
--- /dev/null
+++ b/fs/unicode/mkutf8data.c
@@ -0,0 +1,3419 @@
+/*
+ * Copyright (c) 2014 SGI.
+ * All rights reserved.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License as
+ * published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it would be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write the Free Software Foundation,
+ * Inc.,  51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
+ */
+
+/* Generator for a compact trie for unicode normalization */
+
+#include <sys/types.h>
+#include <stddef.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <assert.h>
+#include <string.h>
+#include <unistd.h>
+#include <errno.h>
+
+/* Default names of the in- and output files. */
+
+#define AGE_NAME	"DerivedAge.txt"
+#define CCC_NAME	"DerivedCombiningClass.txt"
+#define PROP_NAME	"DerivedCoreProperties.txt"
+#define DATA_NAME	"UnicodeData.txt"
+#define FOLD_NAME	"CaseFolding.txt"
+#define NORM_NAME	"NormalizationCorrections.txt"
+#define TEST_NAME	"NormalizationTest.txt"
+#define UTF8_NAME	"utf8data.h"
+
+const char	*age_name  = AGE_NAME;
+const char	*ccc_name  = CCC_NAME;
+const char	*prop_name = PROP_NAME;
+const char	*data_name = DATA_NAME;
+const char	*fold_name = FOLD_NAME;
+const char	*norm_name = NORM_NAME;
+const char	*test_name = TEST_NAME;
+const char	*utf8_name = UTF8_NAME;
+
+int verbose = 0;
+
+/* An arbitrary line size limit on input lines. */
+
+#define LINESIZE	1024
+char line[LINESIZE];
+char buf0[LINESIZE];
+char buf1[LINESIZE];
+char buf2[LINESIZE];
+char buf3[LINESIZE];
+
+const char *argv0;
+
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
+
+/* ------------------------------------------------------------------ */
+
+/*
+ * Unicode version numbers consist of three parts: major, minor, and a
+ * revision.  These numbers are packed into an unsigned int to obtain
+ * a single version number.
+ *
+ * To save space in the generated trie, the unicode version is not
+ * stored directly, instead we calculate a generation number from the
+ * unicode versions seen in the DerivedAge file, and use that as an
+ * index into a table of unicode versions.
+ */
+#define UNICODE_MAJ_SHIFT		(16)
+#define UNICODE_MIN_SHIFT		(8)
+
+#define UNICODE_MAJ_MAX			((unsigned short)-1)
+#define UNICODE_MIN_MAX			((unsigned char)-1)
+#define UNICODE_REV_MAX			((unsigned char)-1)
+
+#define UNICODE_AGE(MAJ,MIN,REV)			\
+	(((unsigned int)(MAJ) << UNICODE_MAJ_SHIFT) |	\
+	 ((unsigned int)(MIN) << UNICODE_MIN_SHIFT) |	\
+	 ((unsigned int)(REV)))
+
+unsigned int *ages;
+int ages_count;
+
+unsigned int unicode_maxage;
+
+static int age_valid(unsigned int major, unsigned int minor,
+		     unsigned int revision)
+{
+	if (major > UNICODE_MAJ_MAX)
+		return 0;
+	if (minor > UNICODE_MIN_MAX)
+		return 0;
+	if (revision > UNICODE_REV_MAX)
+		return 0;
+	return 1;
+}
+
+/* ------------------------------------------------------------------ */
+
+/*
+ * utf8trie_t
+ *
+ * A compact binary tree, used to decode UTF-8 characters.
+ *
+ * Internal nodes are one byte for the node itself, and up to three
+ * bytes for an offset into the tree.  The first byte contains the
+ * following information:
+ *  NEXTBYTE  - flag        - advance to next byte if set
+ *  BITNUM    - 3 bit field - the bit number to tested
+ *  OFFLEN    - 2 bit field - number of bytes in the offset
+ * if offlen == 0 (non-branching node)
+ *  RIGHTPATH - 1 bit field - set if the following node is for the
+ *                            right-hand path (tested bit is set)
+ *  TRIENODE  - 1 bit field - set if the following node is an internal
+ *                            node, otherwise it is a leaf node
+ * if offlen != 0 (branching node)
+ *  LEFTNODE  - 1 bit field - set if the left-hand node is internal
+ *  RIGHTNODE - 1 bit field - set if the right-hand node is internal
+ *
+ * Due to the way utf8 works, there cannot be branching nodes with
+ * NEXTBYTE set, and moreover those nodes always have a righthand
+ * descendant.
+ */
+typedef unsigned char utf8trie_t;
+#define BITNUM		0x07
+#define NEXTBYTE	0x08
+#define OFFLEN		0x30
+#define OFFLEN_SHIFT	4
+#define RIGHTPATH	0x40
+#define TRIENODE	0x80
+#define RIGHTNODE	0x40
+#define LEFTNODE	0x80
+
+/*
+ * utf8leaf_t
+ *
+ * The leaves of the trie are embedded in the trie, and so the same
+ * underlying datatype, unsigned char.
+ *
+ * leaf[0]: The unicode version, stored as a generation number that is
+ *          an index into utf8agetab[].  With this we can filter code
+ *          points based on the unicode version in which they were
+ *          defined.  The CCC of a non-defined code point is 0.
+ * leaf[1]: Canonical Combining Class. During normalization, we need
+ *          to do a stable sort into ascending order of all characters
+ *          with a non-zero CCC that occur between two characters with
+ *          a CCC of 0, or at the begin or end of a string.
+ *          The unicode standard guarantees that all CCC values are
+ *          between 0 and 254 inclusive, which leaves 255 available as
+ *          a special value.
+ *          Code points with CCC 0 are known as stoppers.
+ * leaf[2]: Decomposition. If leaf[1] == 255, then leaf[2] is the
+ *          start of a NUL-terminated string that is the decomposition
+ *          of the character.
+ *          The CCC of a decomposable character is the same as the CCC
+ *          of the first character of its decomposition.
+ *          Some characters decompose as the empty string: these are
+ *          characters with the Default_Ignorable_Code_Point property.
+ *          These do affect normalization, as they all have CCC 0.
+ *
+ * The decompositions in the trie have been fully expanded.
+ *
+ * Casefolding, if applicable, is also done using decompositions.
+ */
+typedef unsigned char utf8leaf_t;
+
+#define LEAF_GEN(LEAF)	((LEAF)[0])
+#define LEAF_CCC(LEAF)	((LEAF)[1])
+#define LEAF_STR(LEAF)	((const char*)((LEAF) + 2))
+
+#define MAXGEN		(255)
+
+#define MINCCC		(0)
+#define MAXCCC		(254)
+#define STOPPER		(0)
+#define DECOMPOSE	(255)
+#define HANGUL		((char)(255))
+
+#define UTF8HANGULLEAF	(12)
+
+struct tree;
+static utf8leaf_t *utf8nlookup(struct tree *, unsigned char *,
+			       const char *, size_t);
+static utf8leaf_t *utf8lookup(struct tree *, unsigned char *, const char *);
+
+unsigned char *utf8data;
+size_t utf8data_size;
+
+utf8trie_t *nfdi;
+utf8trie_t *nfdicf;
+
+/* ------------------------------------------------------------------ */
+
+/*
+ * UTF8 valid ranges.
+ *
+ * The UTF-8 encoding spreads the bits of a 32bit word over several
+ * bytes. This table gives the ranges that can be held and how they'd
+ * be represented.
+ *
+ * 0x00000000 0x0000007F: 0xxxxxxx
+ * 0x00000000 0x000007FF: 110xxxxx 10xxxxxx
+ * 0x00000000 0x0000FFFF: 1110xxxx 10xxxxxx 10xxxxxx
+ * 0x00000000 0x001FFFFF: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 0x00000000 0x03FFFFFF: 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 0x00000000 0x7FFFFFFF: 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ *
+ * There is an additional requirement on UTF-8, in that only the
+ * shortest representation of a 32bit value is to be used.  A decoder
+ * must not decode sequences that do not satisfy this requirement.
+ * Thus the allowed ranges have a lower bound.
+ *
+ * 0x00000000 0x0000007F: 0xxxxxxx
+ * 0x00000080 0x000007FF: 110xxxxx 10xxxxxx
+ * 0x00000800 0x0000FFFF: 1110xxxx 10xxxxxx 10xxxxxx
+ * 0x00010000 0x001FFFFF: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 0x00200000 0x03FFFFFF: 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 0x04000000 0x7FFFFFFF: 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ *
+ * Actual unicode characters are limited to the range 0x0 - 0x10FFFF,
+ * 17 planes of 65536 values.  This limits the sequences actually seen
+ * even more, to just the following.
+ *
+ *          0 -     0x7f: 0                     0x7f
+ *       0x80 -    0x7ff: 0xc2 0x80             0xdf 0xbf
+ *      0x800 -   0xffff: 0xe0 0xa0 0x80        0xef 0xbf 0xbf
+ *    0x10000 - 0x10ffff: 0xf0 0x90 0x80 0x80   0xf4 0x8f 0xbf 0xbf
+ *
+ * Even within those ranges not all values are allowed: the surrogates
+ * 0xd800 - 0xdfff should never be seen.
+ *
+ * Note that the longest sequence seen with valid usage is 4 bytes,
+ * the same a single UTF-32 character.  This makes the UTF-8
+ * representation of Unicode strictly smaller than UTF-32.
+ *
+ * The shortest sequence requirement was introduced by:
+ *    Corrigendum #1: UTF-8 Shortest Form
+ * It can be found here:
+ *    http://www.unicode.org/versions/corrigendum1.html
+ *
+ */
+
+#define UTF8_2_BITS     0xC0
+#define UTF8_3_BITS     0xE0
+#define UTF8_4_BITS     0xF0
+#define UTF8_N_BITS     0x80
+#define UTF8_2_MASK     0xE0
+#define UTF8_3_MASK     0xF0
+#define UTF8_4_MASK     0xF8
+#define UTF8_N_MASK     0xC0
+#define UTF8_V_MASK     0x3F
+#define UTF8_V_SHIFT    6
+
+static int utf8encode(char *str, unsigned int val)
+{
+	int len;
+
+	if (val < 0x80) {
+		str[0] = val;
+		len = 1;
+	} else if (val < 0x800) {
+		str[1] = val & UTF8_V_MASK;
+		str[1] |= UTF8_N_BITS;
+		val >>= UTF8_V_SHIFT;
+		str[0] = val;
+		str[0] |= UTF8_2_BITS;
+		len = 2;
+	} else if (val < 0x10000) {
+		str[2] = val & UTF8_V_MASK;
+		str[2] |= UTF8_N_BITS;
+		val >>= UTF8_V_SHIFT;
+		str[1] = val & UTF8_V_MASK;
+		str[1] |= UTF8_N_BITS;
+		val >>= UTF8_V_SHIFT;
+		str[0] = val;
+		str[0] |= UTF8_3_BITS;
+		len = 3;
+	} else if (val < 0x110000) {
+		str[3] = val & UTF8_V_MASK;
+		str[3] |= UTF8_N_BITS;
+		val >>= UTF8_V_SHIFT;
+		str[2] = val & UTF8_V_MASK;
+		str[2] |= UTF8_N_BITS;
+		val >>= UTF8_V_SHIFT;
+		str[1] = val & UTF8_V_MASK;
+		str[1] |= UTF8_N_BITS;
+		val >>= UTF8_V_SHIFT;
+		str[0] = val;
+		str[0] |= UTF8_4_BITS;
+		len = 4;
+	} else {
+		printf("%#x: illegal val\n", val);
+		len = 0;
+	}
+	return len;
+}
+
+static unsigned int utf8decode(const char *str)
+{
+	const unsigned char *s = (const unsigned char*)str;
+	unsigned int unichar = 0;
+
+	if (*s < 0x80) {
+		unichar = *s;
+	} else if (*s < UTF8_3_BITS) {
+		unichar = *s++ & 0x1F;
+		unichar <<= UTF8_V_SHIFT;
+		unichar |= *s & 0x3F;
+	} else if (*s < UTF8_4_BITS) {
+		unichar = *s++ & 0x0F;
+		unichar <<= UTF8_V_SHIFT;
+		unichar |= *s++ & 0x3F;
+		unichar <<= UTF8_V_SHIFT;
+		unichar |= *s & 0x3F;
+	} else {
+		unichar = *s++ & 0x0F;
+		unichar <<= UTF8_V_SHIFT;
+		unichar |= *s++ & 0x3F;
+		unichar <<= UTF8_V_SHIFT;
+		unichar |= *s++ & 0x3F;
+		unichar <<= UTF8_V_SHIFT;
+		unichar |= *s & 0x3F;
+	}
+	return unichar;
+}
+
+static int utf32valid(unsigned int unichar)
+{
+	return unichar < 0x110000;
+}
+
+#define HANGUL_SYLLABLE(U)	((U) >= 0xAC00 && (U) <= 0xD7A3)
+
+#define NODE 1
+#define LEAF 0
+
+struct tree {
+	void *root;
+	int childnode;
+	const char *type;
+	unsigned int maxage;
+	struct tree *next;
+	int (*leaf_equal)(void *, void *);
+	void (*leaf_print)(void *, int);
+	int (*leaf_mark)(void *);
+	int (*leaf_size)(void *);
+	int *(*leaf_index)(struct tree *, void *);
+	unsigned char *(*leaf_emit)(void *, unsigned char *);
+	int leafindex[0x110000];
+	int index;
+};
+
+struct node {
+	int index;
+	int offset;
+	int mark;
+	int size;
+	struct node *parent;
+	void *left;
+	void *right;
+	unsigned char bitnum;
+	unsigned char nextbyte;
+	unsigned char leftnode;
+	unsigned char rightnode;
+	unsigned int keybits;
+	unsigned int keymask;
+};
+
+/*
+ * Example lookup function for a tree.
+ */
+static void *lookup(struct tree *tree, const char *key)
+{
+	struct node *node;
+	void *leaf = NULL;
+
+	node = tree->root;
+	while (!leaf && node) {
+		if (node->nextbyte)
+			key++;
+		if (*key & (1 << (node->bitnum & 7))) {
+			/* Right leg */
+			if (node->rightnode == NODE) {
+				node = node->right;
+			} else if (node->rightnode == LEAF) {
+				leaf = node->right;
+			} else {
+				node = NULL;
+			}
+		} else {
+			/* Left leg */
+			if (node->leftnode == NODE) {
+				node = node->left;
+			} else if (node->leftnode == LEAF) {
+				leaf = node->left;
+			} else {
+				node = NULL;
+			}
+		}
+	}
+
+	return leaf;
+}
+
+/*
+ * A simple non-recursive tree walker: keep track of visits to the
+ * left and right branches in the leftmask and rightmask.
+ */
+static void tree_walk(struct tree *tree)
+{
+	struct node *node;
+	unsigned int leftmask;
+	unsigned int rightmask;
+	unsigned int bitmask;
+	int indent = 1;
+	int nodes, singletons, leaves;
+
+	nodes = singletons = leaves = 0;
+
+	printf("%s_%x root %p\n", tree->type, tree->maxage, tree->root);
+	if (tree->childnode == LEAF) {
+		assert(tree->root);
+		tree->leaf_print(tree->root, indent);
+		leaves = 1;
+	} else {
+		assert(tree->childnode == NODE);
+		node = tree->root;
+		leftmask = rightmask = 0;
+		while (node) {
+			printf("%*snode @ %p bitnum %d nextbyte %d"
+			       " left %p right %p mask %x bits %x\n",
+				indent, "", node,
+				node->bitnum, node->nextbyte,
+				node->left, node->right,
+				node->keymask, node->keybits);
+			nodes += 1;
+			if (!(node->left && node->right))
+				singletons += 1;
+
+			while (node) {
+				bitmask = 1 << node->bitnum;
+				if ((leftmask & bitmask) == 0) {
+					leftmask |= bitmask;
+					if (node->leftnode == LEAF) {
+						assert(node->left);
+						tree->leaf_print(node->left,
+								 indent+1);
+						leaves += 1;
+					} else if (node->left) {
+						assert(node->leftnode == NODE);
+						indent += 1;
+						node = node->left;
+						break;
+					}
+				}
+				if ((rightmask & bitmask) == 0) {
+					rightmask |= bitmask;
+					if (node->rightnode == LEAF) {
+						assert(node->right);
+						tree->leaf_print(node->right,
+								 indent+1);
+						leaves += 1;
+					} else if (node->right) {
+						assert(node->rightnode == NODE);
+						indent += 1;
+						node = node->right;
+						break;
+					}
+				}
+				leftmask &= ~bitmask;
+				rightmask &= ~bitmask;
+				node = node->parent;
+				indent -= 1;
+			}
+		}
+	}
+	printf("nodes %d leaves %d singletons %d\n",
+	       nodes, leaves, singletons);
+}
+
+/*
+ * Allocate an initialize a new internal node.
+ */
+static struct node *alloc_node(struct node *parent)
+{
+	struct node *node;
+	int bitnum;
+
+	node = malloc(sizeof(*node));
+	node->left = node->right = NULL;
+	node->parent = parent;
+	node->leftnode = NODE;
+	node->rightnode = NODE;
+	node->keybits = 0;
+	node->keymask = 0;
+	node->mark = 0;
+	node->index = 0;
+	node->offset = -1;
+	node->size = 4;
+
+	if (node->parent) {
+		bitnum = parent->bitnum;
+		if ((bitnum & 7) == 0) {
+			node->bitnum = bitnum + 7 + 8;
+			node->nextbyte = 1;
+		} else {
+			node->bitnum = bitnum - 1;
+			node->nextbyte = 0;
+		}
+	} else {
+		node->bitnum = 7;
+		node->nextbyte = 0;
+	}
+
+	return node;
+}
+
+/*
+ * Insert a new leaf into the tree, and collapse any subtrees that are
+ * fully populated and end in identical leaves. A nextbyte tagged
+ * internal node will not be removed to preserve the tree's integrity.
+ * Note that due to the structure of utf8, no nextbyte tagged node
+ * will be a candidate for removal.
+ */
+static int insert(struct tree *tree, char *key, int keylen, void *leaf)
+{
+	struct node *node;
+	struct node *parent;
+	void **cursor;
+	int keybits;
+
+	assert(keylen >= 1 && keylen <= 4);
+
+	node = NULL;
+	cursor = &tree->root;
+	keybits = 8 * keylen;
+
+	/* Insert, creating path along the way. */
+	while (keybits) {
+		if (!*cursor)
+			*cursor = alloc_node(node);
+		node = *cursor;
+		if (node->nextbyte)
+			key++;
+		if (*key & (1 << (node->bitnum & 7)))
+			cursor = &node->right;
+		else
+			cursor = &node->left;
+		keybits--;
+	}
+	*cursor = leaf;
+
+	/* Merge subtrees if possible. */
+	while (node) {
+		if (*key & (1 << (node->bitnum & 7)))
+			node->rightnode = LEAF;
+		else
+			node->leftnode = LEAF;
+		if (node->nextbyte)
+			break;
+		if (node->leftnode == NODE || node->rightnode == NODE)
+			break;
+		assert(node->left);
+		assert(node->right);
+		/* Compare */
+		if (! tree->leaf_equal(node->left, node->right))
+			break;
+		/* Keep left, drop right leaf. */
+		leaf = node->left;
+		/* Check in parent */
+		parent = node->parent;
+		if (!parent) {
+			/* root of tree! */
+			tree->root = leaf;
+			tree->childnode = LEAF;
+		} else if (parent->left == node) {
+			parent->left = leaf;
+			parent->leftnode = LEAF;
+			if (parent->right) {
+				parent->keymask = 0;
+				parent->keybits = 0;
+			} else {
+				parent->keymask |= (1 << node->bitnum);
+			}
+		} else if (parent->right == node) {
+			parent->right = leaf;
+			parent->rightnode = LEAF;
+			if (parent->left) {
+				parent->keymask = 0;
+				parent->keybits = 0;
+			} else {
+				parent->keymask |= (1 << node->bitnum);
+				parent->keybits |= (1 << node->bitnum);
+			}
+		} else {
+			/* internal tree error */
+			assert(0);
+		}
+		free(node);
+		node = parent;
+	}
+
+	/* Propagate keymasks up along singleton chains. */
+	while (node) {
+		parent = node->parent;
+		if (!parent)
+			break;
+		/* Nix the mask for parents with two children. */
+		if (node->keymask == 0) {
+			parent->keymask = 0;
+			parent->keybits = 0;
+		} else if (parent->left && parent->right) {
+			parent->keymask = 0;
+			parent->keybits = 0;
+		} else {
+			assert((parent->keymask & node->keymask) == 0);
+			parent->keymask |= node->keymask;
+			parent->keymask |= (1 << parent->bitnum);
+			parent->keybits |= node->keybits;
+			if (parent->right)
+				parent->keybits |= (1 << parent->bitnum);
+		}
+		node = parent;
+	}
+
+	return 0;
+}
+
+/*
+ * Prune internal nodes.
+ *
+ * Fully populated subtrees that end at the same leaf have already
+ * been collapsed.  There are still internal nodes that have for both
+ * their left and right branches a sequence of singletons that make
+ * identical choices and end in identical leaves.  The keymask and
+ * keybits collected in the nodes describe the choices made in these
+ * singleton chains.  When they are identical for the left and right
+ * branch of a node, and the two leaves comare identical, the node in
+ * question can be removed.
+ *
+ * Note that nodes with the nextbyte tag set will not be removed by
+ * this to ensure tree integrity.  Note as well that the structure of
+ * utf8 ensures that these nodes would not have been candidates for
+ * removal in any case.
+ */
+static void prune(struct tree *tree)
+{
+	struct node *node;
+	struct node *left;
+	struct node *right;
+	struct node *parent;
+	void *leftleaf;
+	void *rightleaf;
+	unsigned int leftmask;
+	unsigned int rightmask;
+	unsigned int bitmask;
+	int count;
+
+	if (verbose > 0)
+		printf("Pruning %s_%x\n", tree->type, tree->maxage);
+
+	count = 0;
+	if (tree->childnode == LEAF)
+		return;
+	if (!tree->root)
+		return;
+
+	leftmask = rightmask = 0;
+	node = tree->root;
+	while (node) {
+		if (node->nextbyte)
+			goto advance;
+		if (node->leftnode == LEAF)
+			goto advance;
+		if (node->rightnode == LEAF)
+			goto advance;
+		if (!node->left)
+			goto advance;
+		if (!node->right)
+			goto advance;
+		left = node->left;
+		right = node->right;
+		if (left->keymask == 0)
+			goto advance;
+		if (right->keymask == 0)
+			goto advance;
+		if (left->keymask != right->keymask)
+			goto advance;
+		if (left->keybits != right->keybits)
+			goto advance;
+		leftleaf = NULL;
+		while (!leftleaf) {
+			assert(left->left || left->right);
+			if (left->leftnode == LEAF)
+				leftleaf = left->left;
+			else if (left->rightnode == LEAF)
+				leftleaf = left->right;
+			else if (left->left)
+				left = left->left;
+			else if (left->right)
+				left = left->right;
+			else
+				assert(0);
+		}
+		rightleaf = NULL;
+		while (!rightleaf) {
+			assert(right->left || right->right);
+			if (right->leftnode == LEAF)
+				rightleaf = right->left;
+			else if (right->rightnode == LEAF)
+				rightleaf = right->right;
+			else if (right->left)
+				right = right->left;
+			else if (right->right)
+				right = right->right;
+			else
+				assert(0);
+		}
+		if (! tree->leaf_equal(leftleaf, rightleaf))
+			goto advance;
+		/*
+		 * This node has identical singleton-only subtrees.
+		 * Remove it.
+		 */
+		parent = node->parent;
+		left = node->left;
+		right = node->right;
+		if (parent->left == node)
+			parent->left = left;
+		else if (parent->right == node)
+			parent->right = left;
+		else
+			assert(0);
+		left->parent = parent;
+		left->keymask |= (1 << node->bitnum);
+		node->left = NULL;
+		while (node) {
+			bitmask = 1 << node->bitnum;
+			leftmask &= ~bitmask;
+			rightmask &= ~bitmask;
+			if (node->leftnode == NODE && node->left) {
+				left = node->left;
+				free(node);
+				count++;
+				node = left;
+			} else if (node->rightnode == NODE && node->right) {
+				right = node->right;
+				free(node);
+				count++;
+				node = right;
+			} else {
+				node = NULL;
+			}
+		}
+		/* Propagate keymasks up along singleton chains. */
+		node = parent;
+		/* Force re-check */
+		bitmask = 1 << node->bitnum;
+		leftmask &= ~bitmask;
+		rightmask &= ~bitmask;
+		for (;;) {
+			if (node->left && node->right)
+				break;
+			if (node->left) {
+				left = node->left;
+				node->keymask |= left->keymask;
+				node->keybits |= left->keybits;
+			}
+			if (node->right) {
+				right = node->right;
+				node->keymask |= right->keymask;
+				node->keybits |= right->keybits;
+			}
+			node->keymask |= (1 << node->bitnum);
+			node = node->parent;
+			/* Force re-check */
+			bitmask = 1 << node->bitnum;
+			leftmask &= ~bitmask;
+			rightmask &= ~bitmask;
+		}
+	advance:
+		bitmask = 1 << node->bitnum;
+		if ((leftmask & bitmask) == 0 &&
+		    node->leftnode == NODE &&
+		    node->left) {
+			leftmask |= bitmask;
+			node = node->left;
+		} else if ((rightmask & bitmask) == 0 &&
+			   node->rightnode == NODE &&
+			   node->right) {
+			rightmask |= bitmask;
+			node = node->right;
+		} else {
+			leftmask &= ~bitmask;
+			rightmask &= ~bitmask;
+			node = node->parent;
+		}
+	}
+	if (verbose > 0)
+		printf("Pruned %d nodes\n", count);
+}
+
+/*
+ * Mark the nodes in the tree that lead to leaves that must be
+ * emitted.
+ */
+static void mark_nodes(struct tree *tree)
+{
+	struct node *node;
+	struct node *n;
+	unsigned int leftmask;
+	unsigned int rightmask;
+	unsigned int bitmask;
+	int marked;
+
+	marked = 0;
+	if (verbose > 0)
+		printf("Marking %s_%x\n", tree->type, tree->maxage);
+	if (tree->childnode == LEAF)
+		goto done;
+
+	assert(tree->childnode == NODE);
+	node = tree->root;
+	leftmask = rightmask = 0;
+	while (node) {
+		bitmask = 1 << node->bitnum;
+		if ((leftmask & bitmask) == 0) {
+			leftmask |= bitmask;
+			if (node->leftnode == LEAF) {
+				assert(node->left);
+				if (tree->leaf_mark(node->left)) {
+					n = node;
+					while (n && !n->mark) {
+						marked++;
+						n->mark = 1;
+						n = n->parent;
+					}
+				}
+			} else if (node->left) {
+				assert(node->leftnode == NODE);
+				node = node->left;
+				continue;
+			}
+		}
+		if ((rightmask & bitmask) == 0) {
+			rightmask |= bitmask;
+			if (node->rightnode == LEAF) {
+				assert(node->right);
+				if (tree->leaf_mark(node->right)) {
+					n = node;
+					while (n && !n->mark) {
+						marked++;
+						n->mark = 1;
+						n = n->parent;
+					}
+				}
+			} else if (node->right) {
+				assert(node->rightnode == NODE);
+				node = node->right;
+				continue;
+			}
+		}
+		leftmask &= ~bitmask;
+		rightmask &= ~bitmask;
+		node = node->parent;
+	}
+
+	/* second pass: left siblings and singletons */
+
+	assert(tree->childnode == NODE);
+	node = tree->root;
+	leftmask = rightmask = 0;
+	while (node) {
+		bitmask = 1 << node->bitnum;
+		if ((leftmask & bitmask) == 0) {
+			leftmask |= bitmask;
+			if (node->leftnode == LEAF) {
+				assert(node->left);
+				if (tree->leaf_mark(node->left)) {
+					n = node;
+					while (n && !n->mark) {
+						marked++;
+						n->mark = 1;
+						n = n->parent;
+					}
+				}
+			} else if (node->left) {
+				assert(node->leftnode == NODE);
+				node = node->left;
+				if (!node->mark && node->parent->mark) {
+					marked++;
+					node->mark = 1;
+				}
+				continue;
+			}
+		}
+		if ((rightmask & bitmask) == 0) {
+			rightmask |= bitmask;
+			if (node->rightnode == LEAF) {
+				assert(node->right);
+				if (tree->leaf_mark(node->right)) {
+					n = node;
+					while (n && !n->mark) {
+						marked++;
+						n->mark = 1;
+						n = n->parent;
+					}
+				}
+			} else if (node->right) {
+				assert(node->rightnode == NODE);
+				node = node->right;
+				if (!node->mark && node->parent->mark &&
+				    !node->parent->left) {
+					marked++;
+					node->mark = 1;
+				}
+				continue;
+			}
+		}
+		leftmask &= ~bitmask;
+		rightmask &= ~bitmask;
+		node = node->parent;
+	}
+done:
+	if (verbose > 0)
+		printf("Marked %d nodes\n", marked);
+}
+
+/*
+ * Compute the index of each node and leaf, which is the offset in the
+ * emitted trie.  These values must be pre-computed because relative
+ * offsets between nodes are used to navigate the tree.
+ */
+static int index_nodes(struct tree *tree, int index)
+{
+	struct node *node;
+	unsigned int leftmask;
+	unsigned int rightmask;
+	unsigned int bitmask;
+	int count;
+	int indent;
+
+	/* Align to a cache line (or half a cache line?). */
+	while (index % 64)
+		index++;
+	tree->index = index;
+	indent = 1;
+	count = 0;
+
+	if (verbose > 0)
+		printf("Indexing %s_%x: %d\n", tree->type, tree->maxage, index);
+	if (tree->childnode == LEAF) {
+		index += tree->leaf_size(tree->root);
+		goto done;
+	}
+
+	assert(tree->childnode == NODE);
+	node = tree->root;
+	leftmask = rightmask = 0;
+	while (node) {
+		if (!node->mark)
+			goto skip;
+		count++;
+		if (node->index != index)
+			node->index = index;
+		index += node->size;
+skip:
+		while (node) {
+			bitmask = 1 << node->bitnum;
+			if (node->mark && (leftmask & bitmask) == 0) {
+				leftmask |= bitmask;
+				if (node->leftnode == LEAF) {
+					assert(node->left);
+					*tree->leaf_index(tree, node->left) =
+									index;
+					index += tree->leaf_size(node->left);
+					count++;
+				} else if (node->left) {
+					assert(node->leftnode == NODE);
+					indent += 1;
+					node = node->left;
+					break;
+				}
+			}
+			if (node->mark && (rightmask & bitmask) == 0) {
+				rightmask |= bitmask;
+				if (node->rightnode == LEAF) {
+					assert(node->right);
+					*tree->leaf_index(tree, node->right) = index;
+					index += tree->leaf_size(node->right);
+					count++;
+				} else if (node->right) {
+					assert(node->rightnode == NODE);
+					indent += 1;
+					node = node->right;
+					break;
+				}
+			}
+			leftmask &= ~bitmask;
+			rightmask &= ~bitmask;
+			node = node->parent;
+			indent -= 1;
+		}
+	}
+done:
+	/* Round up to a multiple of 16 */
+	while (index % 16)
+		index++;
+	if (verbose > 0)
+		printf("Final index %d\n", index);
+	return index;
+}
+
+/*
+ * Mark the nodes in a subtree, helper for size_nodes().
+ */
+static int mark_subtree(struct node *node)
+{
+	int changed;
+
+	if (!node || node->mark)
+		return 0;
+	node->mark = 1;
+	node->index = node->parent->index;
+	changed = 1;
+	if (node->leftnode == NODE)
+		changed += mark_subtree(node->left);
+	if (node->rightnode == NODE)
+		changed += mark_subtree(node->right);
+	return changed;
+}
+
+/*
+ * Compute the size of nodes and leaves. We start by assuming that
+ * each node needs to store a three-byte offset. The indexes of the
+ * nodes are calculated based on that, and then this function is
+ * called to see if the sizes of some nodes can be reduced.  This is
+ * repeated until no more changes are seen.
+ */
+static int size_nodes(struct tree *tree)
+{
+	struct tree *next;
+	struct node *node;
+	struct node *right;
+	struct node *n;
+	unsigned int leftmask;
+	unsigned int rightmask;
+	unsigned int bitmask;
+	unsigned int pathbits;
+	unsigned int pathmask;
+	unsigned int nbit;
+	int changed;
+	int offset;
+	int size;
+	int indent;
+
+	indent = 1;
+	changed = 0;
+	size = 0;
+
+	if (verbose > 0)
+		printf("Sizing %s_%x\n", tree->type, tree->maxage);
+	if (tree->childnode == LEAF)
+		goto done;
+
+	assert(tree->childnode == NODE);
+	pathbits = 0;
+	pathmask = 0;
+	node = tree->root;
+	leftmask = rightmask = 0;
+	while (node) {
+		if (!node->mark)
+			goto skip;
+		offset = 0;
+		if (!node->left || !node->right) {
+			size = 1;
+		} else {
+			if (node->rightnode == NODE) {
+				/*
+				 * If the right node is not marked,
+				 * look for a corresponding node in
+				 * the next tree.  Such a node need
+				 * not exist.
+				 */
+				right = node->right;
+				next = tree->next;
+				while (!right->mark) {
+					assert(next);
+					n = next->root;
+					while (n->bitnum != node->bitnum) {
+						nbit = 1 << n->bitnum;
+						if (!(pathmask & nbit))
+							break;
+						if (pathbits & nbit) {
+							if (n->rightnode == LEAF)
+								break;
+							n = n->right;
+						} else {
+							if (n->leftnode == LEAF)
+								break;
+							n = n->left;
+						}
+					}
+					if (n->bitnum != node->bitnum)
+						break;
+					n = n->right;
+					right = n;
+					next = next->next;
+				}
+				/* Make sure the right node is marked. */
+				if (!right->mark)
+					changed += mark_subtree(right);
+				offset = right->index - node->index;
+			} else {
+				offset = *tree->leaf_index(tree, node->right);
+				offset -= node->index;
+			}
+			assert(offset >= 0);
+			assert(offset <= 0xffffff);
+			if (offset <= 0xff) {
+				size = 2;
+			} else if (offset <= 0xffff) {
+				size = 3;
+			} else { /* offset <= 0xffffff */
+				size = 4;
+			}
+		}
+		if (node->size != size || node->offset != offset) {
+			node->size = size;
+			node->offset = offset;
+			changed++;
+		}
+skip:
+		while (node) {
+			bitmask = 1 << node->bitnum;
+			pathmask |= bitmask;
+			if (node->mark && (leftmask & bitmask) == 0) {
+				leftmask |= bitmask;
+				if (node->leftnode == LEAF) {
+					assert(node->left);
+				} else if (node->left) {
+					assert(node->leftnode == NODE);
+					indent += 1;
+					node = node->left;
+					break;
+				}
+			}
+			if (node->mark && (rightmask & bitmask) == 0) {
+				rightmask |= bitmask;
+				pathbits |= bitmask;
+				if (node->rightnode == LEAF) {
+					assert(node->right);
+				} else if (node->right) {
+					assert(node->rightnode == NODE);
+					indent += 1;
+					node = node->right;
+					break;
+				}
+			}
+			leftmask &= ~bitmask;
+			rightmask &= ~bitmask;
+			pathmask &= ~bitmask;
+			pathbits &= ~bitmask;
+			node = node->parent;
+			indent -= 1;
+		}
+	}
+done:
+	if (verbose > 0)
+		printf("Found %d changes\n", changed);
+	return changed;
+}
+
+/*
+ * Emit a trie for the given tree into the data array.
+ */
+static void emit(struct tree *tree, unsigned char *data)
+{
+	struct node *node;
+	unsigned int leftmask;
+	unsigned int rightmask;
+	unsigned int bitmask;
+	int offlen;
+	int offset;
+	int index;
+	int indent;
+	int size;
+	int bytes;
+	int leaves;
+	int nodes[4];
+	unsigned char byte;
+
+	nodes[0] = nodes[1] = nodes[2] = nodes[3] = 0;
+	leaves = 0;
+	bytes = 0;
+	index = tree->index;
+	data += index;
+	indent = 1;
+	if (verbose > 0)
+		printf("Emitting %s_%x\n", tree->type, tree->maxage);
+	if (tree->childnode == LEAF) {
+		assert(tree->root);
+		tree->leaf_emit(tree->root, data);
+		size = tree->leaf_size(tree->root);
+		index += size;
+		leaves++;
+		goto done;
+	}
+
+	assert(tree->childnode == NODE);
+	node = tree->root;
+	leftmask = rightmask = 0;
+	while (node) {
+		if (!node->mark)
+			goto skip;
+		assert(node->offset != -1);
+		assert(node->index == index);
+
+		byte = 0;
+		if (node->nextbyte)
+			byte |= NEXTBYTE;
+		byte |= (node->bitnum & BITNUM);
+		if (node->left && node->right) {
+			if (node->leftnode == NODE)
+				byte |= LEFTNODE;
+			if (node->rightnode == NODE)
+				byte |= RIGHTNODE;
+			if (node->offset <= 0xff)
+				offlen = 1;
+			else if (node->offset <= 0xffff)
+				offlen = 2;
+			else
+				offlen = 3;
+			nodes[offlen]++;
+			offset = node->offset;
+			byte |= offlen << OFFLEN_SHIFT;
+			*data++ = byte;
+			index++;
+			while (offlen--) {
+				*data++ = offset & 0xff;
+				index++;
+				offset >>= 8;
+			}
+		} else if (node->left) {
+			if (node->leftnode == NODE)
+				byte |= TRIENODE;
+			nodes[0]++;
+			*data++ = byte;
+			index++;
+		} else if (node->right) {
+			byte |= RIGHTNODE;
+			if (node->rightnode == NODE)
+				byte |= TRIENODE;
+			nodes[0]++;
+			*data++ = byte;
+			index++;
+		} else {
+			assert(0);
+		}
+skip:
+		while (node) {
+			bitmask = 1 << node->bitnum;
+			if (node->mark && (leftmask & bitmask) == 0) {
+				leftmask |= bitmask;
+				if (node->leftnode == LEAF) {
+					assert(node->left);
+					data = tree->leaf_emit(node->left,
+							       data);
+					size = tree->leaf_size(node->left);
+					index += size;
+					bytes += size;
+					leaves++;
+				} else if (node->left) {
+					assert(node->leftnode == NODE);
+					indent += 1;
+					node = node->left;
+					break;
+				}
+			}
+			if (node->mark && (rightmask & bitmask) == 0) {
+				rightmask |= bitmask;
+				if (node->rightnode == LEAF) {
+					assert(node->right);
+					data = tree->leaf_emit(node->right,
+							       data);
+					size = tree->leaf_size(node->right);
+					index += size;
+					bytes += size;
+					leaves++;
+				} else if (node->right) {
+					assert(node->rightnode == NODE);
+					indent += 1;
+					node = node->right;
+					break;
+				}
+			}
+			leftmask &= ~bitmask;
+			rightmask &= ~bitmask;
+			node = node->parent;
+			indent -= 1;
+		}
+	}
+done:
+	if (verbose > 0) {
+		printf("Emitted %d (%d) leaves",
+			leaves, bytes);
+		printf(" %d (%d+%d+%d+%d) nodes",
+			nodes[0] + nodes[1] + nodes[2] + nodes[3],
+			nodes[0], nodes[1], nodes[2], nodes[3]);
+		printf(" %d total\n", index - tree->index);
+	}
+}
+
+/* ------------------------------------------------------------------ */
+
+/*
+ * Unicode data.
+ *
+ * We need to keep track of the Canonical Combining Class, the Age,
+ * and decompositions for a code point.
+ *
+ * For the Age, we store the index into the ages table.  Effectively
+ * this is a generation number that the table maps to a unicode
+ * version.
+ *
+ * The correction field is used to indicate that this entry is in the
+ * corrections array, which contains decompositions that were
+ * corrected in later revisions.  The value of the correction field is
+ * the Unicode version in which the mapping was corrected.
+ */
+struct unicode_data {
+	unsigned int code;
+	int ccc;
+	int gen;
+	int correction;
+	unsigned int *utf32nfdi;
+	unsigned int *utf32nfdicf;
+	char *utf8nfdi;
+	char *utf8nfdicf;
+};
+
+struct unicode_data unicode_data[0x110000];
+struct unicode_data *corrections;
+int    corrections_count;
+
+struct tree *nfdi_tree;
+struct tree *nfdicf_tree;
+
+struct tree *trees;
+int          trees_count;
+
+/*
+ * Check the corrections array to see if this entry was corrected at
+ * some point.
+ */
+static struct unicode_data *corrections_lookup(struct unicode_data *u)
+{
+	int i;
+
+	for (i = 0; i != corrections_count; i++)
+		if (u->code == corrections[i].code)
+			return &corrections[i];
+	return u;
+}
+
+static int nfdi_equal(void *l, void *r)
+{
+	struct unicode_data *left = l;
+	struct unicode_data *right = r;
+
+	if (left->gen != right->gen)
+		return 0;
+	if (left->ccc != right->ccc)
+		return 0;
+	if (left->utf8nfdi && right->utf8nfdi &&
+	    strcmp(left->utf8nfdi, right->utf8nfdi) == 0)
+		return 1;
+	if (left->utf8nfdi || right->utf8nfdi)
+		return 0;
+	return 1;
+}
+
+static int nfdicf_equal(void *l, void *r)
+{
+	struct unicode_data *left = l;
+	struct unicode_data *right = r;
+
+	if (left->gen != right->gen)
+		return 0;
+	if (left->ccc != right->ccc)
+		return 0;
+	if (left->utf8nfdicf && right->utf8nfdicf &&
+	    strcmp(left->utf8nfdicf, right->utf8nfdicf) == 0)
+		return 1;
+	if (left->utf8nfdicf && right->utf8nfdicf)
+		return 0;
+	if (left->utf8nfdicf || right->utf8nfdicf)
+		return 0;
+	if (left->utf8nfdi && right->utf8nfdi &&
+	    strcmp(left->utf8nfdi, right->utf8nfdi) == 0)
+		return 1;
+	if (left->utf8nfdi || right->utf8nfdi)
+		return 0;
+	return 1;
+}
+
+static void nfdi_print(void *l, int indent)
+{
+	struct unicode_data *leaf = l;
+
+	printf("%*sleaf @ %p code %X ccc %d gen %d", indent, "", leaf,
+		leaf->code, leaf->ccc, leaf->gen);
+
+	if (leaf->utf8nfdi && leaf->utf8nfdi[0] == HANGUL)
+		printf(" nfdi \"%s\"", "HANGUL SYLLABLE");
+	else if (leaf->utf8nfdi)
+		printf(" nfdi \"%s\"", (const char*)leaf->utf8nfdi);
+
+	printf("\n");
+}
+
+static void nfdicf_print(void *l, int indent)
+{
+	struct unicode_data *leaf = l;
+
+	printf("%*sleaf @ %p code %X ccc %d gen %d", indent, "", leaf,
+		leaf->code, leaf->ccc, leaf->gen);
+
+	if (leaf->utf8nfdicf)
+		printf(" nfdicf \"%s\"", (const char*)leaf->utf8nfdicf);
+	else if (leaf->utf8nfdi && leaf->utf8nfdi[0] == HANGUL)
+		printf(" nfdi \"%s\"", "HANGUL SYLLABLE");
+	else if (leaf->utf8nfdi)
+		printf(" nfdi \"%s\"", (const char*)leaf->utf8nfdi);
+	printf("\n");
+}
+
+static int nfdi_mark(void *l)
+{
+	return 1;
+}
+
+static int nfdicf_mark(void *l)
+{
+	struct unicode_data *leaf = l;
+
+	if (leaf->utf8nfdicf)
+		return 1;
+	return 0;
+}
+
+static int correction_mark(void *l)
+{
+	struct unicode_data *leaf = l;
+
+	return leaf->correction;
+}
+
+static int nfdi_size(void *l)
+{
+	struct unicode_data *leaf = l;
+	int size = 2;
+
+	if (HANGUL_SYLLABLE(leaf->code))
+		size += 1;
+	else if (leaf->utf8nfdi)
+		size += strlen(leaf->utf8nfdi) + 1;
+	return size;
+}
+
+static int nfdicf_size(void *l)
+{
+	struct unicode_data *leaf = l;
+	int size = 2;
+
+	if (HANGUL_SYLLABLE(leaf->code))
+		size += 1;
+	else if (leaf->utf8nfdicf)
+		size += strlen(leaf->utf8nfdicf) + 1;
+	else if (leaf->utf8nfdi)
+		size += strlen(leaf->utf8nfdi) + 1;
+	return size;
+}
+
+static int *nfdi_index(struct tree *tree, void *l)
+{
+	struct unicode_data *leaf = l;
+
+	return &tree->leafindex[leaf->code];
+}
+
+static int *nfdicf_index(struct tree *tree, void *l)
+{
+	struct unicode_data *leaf = l;
+
+	return &tree->leafindex[leaf->code];
+}
+
+static unsigned char *nfdi_emit(void *l, unsigned char *data)
+{
+	struct unicode_data *leaf = l;
+	unsigned char *s;
+
+	*data++ = leaf->gen;
+
+	if (HANGUL_SYLLABLE(leaf->code)) {
+		*data++ = DECOMPOSE;
+		*data++ = HANGUL;
+	} else if (leaf->utf8nfdi) {
+		*data++ = DECOMPOSE;
+		s = (unsigned char*)leaf->utf8nfdi;
+		while ((*data++ = *s++) != 0)
+			;
+	} else {
+		*data++ = leaf->ccc;
+	}
+	return data;
+}
+
+static unsigned char *nfdicf_emit(void *l, unsigned char *data)
+{
+	struct unicode_data *leaf = l;
+	unsigned char *s;
+
+	*data++ = leaf->gen;
+
+	if (HANGUL_SYLLABLE(leaf->code)) {
+		*data++ = DECOMPOSE;
+		*data++ = HANGUL;
+	} else if (leaf->utf8nfdicf) {
+		*data++ = DECOMPOSE;
+		s = (unsigned char*)leaf->utf8nfdicf;
+		while ((*data++ = *s++) != 0)
+			;
+	} else if (leaf->utf8nfdi) {
+		*data++ = DECOMPOSE;
+		s = (unsigned char*)leaf->utf8nfdi;
+		while ((*data++ = *s++) != 0)
+			;
+	} else {
+		*data++ = leaf->ccc;
+	}
+	return data;
+}
+
+static void utf8_create(struct unicode_data *data)
+{
+	char utf[18*4+1];
+	char *u;
+	unsigned int *um;
+	int i;
+
+	if (data->utf8nfdi) {
+		assert(data->utf8nfdi[0] == HANGUL);
+		return;
+	}
+
+	u = utf;
+	um = data->utf32nfdi;
+	if (um) {
+		for (i = 0; um[i]; i++)
+			u += utf8encode(u, um[i]);
+		*u = '\0';
+		data->utf8nfdi = strdup(utf);
+	}
+	u = utf;
+	um = data->utf32nfdicf;
+	if (um) {
+		for (i = 0; um[i]; i++)
+			u += utf8encode(u, um[i]);
+		*u = '\0';
+		if (!data->utf8nfdi || strcmp(data->utf8nfdi, utf))
+			data->utf8nfdicf = strdup(utf);
+	}
+}
+
+static void utf8_init(void)
+{
+	unsigned int unichar;
+	int i;
+
+	for (unichar = 0; unichar != 0x110000; unichar++)
+		utf8_create(&unicode_data[unichar]);
+
+	for (i = 0; i != corrections_count; i++)
+		utf8_create(&corrections[i]);
+}
+
+static void trees_init(void)
+{
+	struct unicode_data *data;
+	unsigned int maxage;
+	unsigned int nextage;
+	int count;
+	int i;
+	int j;
+
+	/* Count the number of different ages. */
+	count = 0;
+	nextage = (unsigned int)-1;
+	do {
+		maxage = nextage;
+		nextage = 0;
+		for (i = 0; i <= corrections_count; i++) {
+			data = &corrections[i];
+			if (nextage < data->correction &&
+			    data->correction < maxage)
+				nextage = data->correction;
+		}
+		count++;
+	} while (nextage);
+
+	/* Two trees per age: nfdi and nfdicf */
+	trees_count = count * 2;
+	trees = calloc(trees_count, sizeof(struct tree));
+
+	/* Assign ages to the trees. */
+	count = trees_count;
+	nextage = (unsigned int)-1;
+	do {
+		maxage = nextage;
+		trees[--count].maxage = maxage;
+		trees[--count].maxage = maxage;
+		nextage = 0;
+		for (i = 0; i <= corrections_count; i++) {
+			data = &corrections[i];
+			if (nextage < data->correction &&
+			    data->correction < maxage)
+				nextage = data->correction;
+		}
+	} while (nextage);
+
+	/* The ages assigned above are off by one. */
+	for (i = 0; i != trees_count; i++) {
+		j = 0;
+		while (ages[j] < trees[i].maxage)
+			j++;
+		trees[i].maxage = ages[j-1];
+	}
+
+	/* Set up the forwarding between trees. */
+	trees[trees_count-2].next = &trees[trees_count-1];
+	trees[trees_count-1].leaf_mark = nfdi_mark;
+	trees[trees_count-2].leaf_mark = nfdicf_mark;
+	for (i = 0; i != trees_count-2; i += 2) {
+		trees[i].next = &trees[trees_count-2];
+		trees[i].leaf_mark = correction_mark;
+		trees[i+1].next = &trees[trees_count-1];
+		trees[i+1].leaf_mark = correction_mark;
+	}
+
+	/* Assign the callouts. */
+	for (i = 0; i != trees_count; i += 2) {
+		trees[i].type = "nfdicf";
+		trees[i].leaf_equal = nfdicf_equal;
+		trees[i].leaf_print = nfdicf_print;
+		trees[i].leaf_size = nfdicf_size;
+		trees[i].leaf_index = nfdicf_index;
+		trees[i].leaf_emit = nfdicf_emit;
+
+		trees[i+1].type = "nfdi";
+		trees[i+1].leaf_equal = nfdi_equal;
+		trees[i+1].leaf_print = nfdi_print;
+		trees[i+1].leaf_size = nfdi_size;
+		trees[i+1].leaf_index = nfdi_index;
+		trees[i+1].leaf_emit = nfdi_emit;
+	}
+
+	/* Finish init. */
+	for (i = 0; i != trees_count; i++)
+		trees[i].childnode = NODE;
+}
+
+static void trees_populate(void)
+{
+	struct unicode_data *data;
+	unsigned int unichar;
+	char keyval[4];
+	int keylen;
+	int i;
+
+	for (i = 0; i != trees_count; i++) {
+		if (verbose > 0) {
+			printf("Populating %s_%x\n",
+				trees[i].type, trees[i].maxage);
+		}
+		for (unichar = 0; unichar != 0x110000; unichar++) {
+			if (unicode_data[unichar].gen < 0)
+				continue;
+			keylen = utf8encode(keyval, unichar);
+			data = corrections_lookup(&unicode_data[unichar]);
+			if (data->correction <= trees[i].maxage)
+				data = &unicode_data[unichar];
+			insert(&trees[i], keyval, keylen, data);
+		}
+	}
+}
+
+static void trees_reduce(void)
+{
+	int i;
+	int size;
+	int changed;
+
+	for (i = 0; i != trees_count; i++)
+		prune(&trees[i]);
+	for (i = 0; i != trees_count; i++)
+		mark_nodes(&trees[i]);
+	do {
+		size = 0;
+		for (i = 0; i != trees_count; i++)
+			size = index_nodes(&trees[i], size);
+		changed = 0;
+		for (i = 0; i != trees_count; i++)
+			changed += size_nodes(&trees[i]);
+	} while (changed);
+
+	utf8data = calloc(size, 1);
+	utf8data_size = size;
+	for (i = 0; i != trees_count; i++)
+		emit(&trees[i], utf8data);
+
+	if (verbose > 0) {
+		for (i = 0; i != trees_count; i++) {
+			printf("%s_%x idx %d\n",
+				trees[i].type, trees[i].maxage, trees[i].index);
+		}
+	}
+
+	nfdi = utf8data + trees[trees_count-1].index;
+	nfdicf = utf8data + trees[trees_count-2].index;
+
+	nfdi_tree = &trees[trees_count-1];
+	nfdicf_tree = &trees[trees_count-2];
+}
+
+static void verify(struct tree *tree)
+{
+	struct unicode_data *data;
+	utf8leaf_t	*leaf;
+	unsigned int	unichar;
+	char		key[4];
+	unsigned char	hangul[UTF8HANGULLEAF];
+	int		report;
+	int		nocf;
+
+	if (verbose > 0)
+		printf("Verifying %s_%x\n", tree->type, tree->maxage);
+	nocf = strcmp(tree->type, "nfdicf");
+
+	for (unichar = 0; unichar != 0x110000; unichar++) {
+		report = 0;
+		data = corrections_lookup(&unicode_data[unichar]);
+		if (data->correction <= tree->maxage)
+			data = &unicode_data[unichar];
+		utf8encode(key,unichar);
+		leaf = utf8lookup(tree, hangul, key);
+
+		if (!leaf) {
+			if (data->gen != -1)
+				report++;
+			if (unichar < 0xd800 || unichar > 0xdfff)
+				report++;
+		} else {
+			if (unichar >= 0xd800 && unichar <= 0xdfff)
+				report++;
+			if (data->gen == -1)
+				report++;
+			if (data->gen != LEAF_GEN(leaf))
+				report++;
+			if (LEAF_CCC(leaf) == DECOMPOSE) {
+				if (HANGUL_SYLLABLE(data->code)) {
+					if (data->utf8nfdi[0] != HANGUL)
+						report++;
+				} else if (nocf) {
+					if (!data->utf8nfdi) {
+						report++;
+					} else if (strcmp(data->utf8nfdi,
+							  LEAF_STR(leaf))) {
+						report++;
+					}
+				} else {
+					if (!data->utf8nfdicf &&
+					    !data->utf8nfdi) {
+						report++;
+					} else if (data->utf8nfdicf) {
+						if (strcmp(data->utf8nfdicf,
+							   LEAF_STR(leaf)))
+							report++;
+					} else if (strcmp(data->utf8nfdi,
+							  LEAF_STR(leaf))) {
+						report++;
+					}
+				}
+			} else if (data->ccc != LEAF_CCC(leaf)) {
+				report++;
+			}
+		}
+		if (report) {
+			printf("%X code %X gen %d ccc %d"
+				" nfdi -> \"%s\"",
+				unichar, data->code, data->gen,
+				data->ccc,
+				data->utf8nfdi);
+			if (leaf) {
+				printf(" gen %d ccc %d"
+					" nfdi -> \"%s\"",
+					LEAF_GEN(leaf),
+					LEAF_CCC(leaf),
+					LEAF_CCC(leaf) == DECOMPOSE ?
+						LEAF_STR(leaf) : "");
+			}
+			printf("\n");
+		}
+	}
+}
+
+static void trees_verify(void)
+{
+	int i;
+
+	for (i = 0; i != trees_count; i++)
+		verify(&trees[i]);
+}
+
+/* ------------------------------------------------------------------ */
+
+static void help(void)
+{
+	printf("Usage: %s [options]\n", argv0);
+	printf("\n");
+	printf("This program creates an a data trie used for parsing and\n");
+	printf("normalization of UTF-8 strings. The trie is derived from\n");
+	printf("a set of input files from the Unicode character database\n");
+	printf("found at: http://www.unicode.org/Public/UCD/latest/ucd/\n");
+	printf("\n");
+	printf("The generated tree supports two normalization forms:\n");
+	printf("\n");
+	printf("\tnfdi:\n");
+	printf("\t- Apply unicode normalization form NFD.\n");
+	printf("\t- Remove any Default_Ignorable_Code_Point.\n");
+	printf("\n");
+	printf("\tnfdicf:\n");
+	printf("\t- Apply unicode normalization form NFD.\n");
+	printf("\t- Remove any Default_Ignorable_Code_Point.\n");
+	printf("\t- Apply a full casefold (C + F).\n");
+	printf("\n");
+	printf("These forms were chosen as being most useful when dealing\n");
+	printf("with file names: NFD catches most cases where characters\n");
+	printf("should be considered equivalent. The ignorables are mostly\n");
+	printf("invisible, making names hard to type.\n");
+	printf("\n");
+	printf("The options to specify the files to be used are listed\n");
+	printf("below with their default values, which are the names used\n");
+	printf("by version 11.0.0 of the Unicode Character Database.\n");
+	printf("\n");
+	printf("The input files:\n");
+	printf("\t-a %s\n", AGE_NAME);
+	printf("\t-c %s\n", CCC_NAME);
+	printf("\t-p %s\n", PROP_NAME);
+	printf("\t-d %s\n", DATA_NAME);
+	printf("\t-f %s\n", FOLD_NAME);
+	printf("\t-n %s\n", NORM_NAME);
+	printf("\n");
+	printf("Additionally, the generated tables are tested using:\n");
+	printf("\t-t %s\n", TEST_NAME);
+	printf("\n");
+	printf("Finally, the output file:\n");
+	printf("\t-o %s\n", UTF8_NAME);
+	printf("\n");
+}
+
+static void usage(void)
+{
+	help();
+	exit(1);
+}
+
+static void open_fail(const char *name, int error)
+{
+	printf("Error %d opening %s: %s\n", error, name, strerror(error));
+	exit(1);
+}
+
+static void file_fail(const char *filename)
+{
+	printf("Error parsing %s\n", filename);
+	exit(1);
+}
+
+static void line_fail(const char *filename, const char *line)
+{
+	printf("Error parsing %s:%s\n", filename, line);
+	exit(1);
+}
+
+/* ------------------------------------------------------------------ */
+
+static void print_utf32(unsigned int *utf32str)
+{
+	int	i;
+
+	for (i = 0; utf32str[i]; i++)
+		printf(" %X", utf32str[i]);
+}
+
+static void print_utf32nfdi(unsigned int unichar)
+{
+	printf(" %X ->", unichar);
+	print_utf32(unicode_data[unichar].utf32nfdi);
+	printf("\n");
+}
+
+static void print_utf32nfdicf(unsigned int unichar)
+{
+	printf(" %X ->", unichar);
+	print_utf32(unicode_data[unichar].utf32nfdicf);
+	printf("\n");
+}
+
+/* ------------------------------------------------------------------ */
+
+static void age_init(void)
+{
+	FILE *file;
+	unsigned int first;
+	unsigned int last;
+	unsigned int unichar;
+	unsigned int major;
+	unsigned int minor;
+	unsigned int revision;
+	int gen;
+	int count;
+	int ret;
+
+	if (verbose > 0)
+		printf("Parsing %s\n", age_name);
+
+	file = fopen(age_name, "r");
+	if (!file)
+		open_fail(age_name, errno);
+	count = 0;
+
+	gen = 0;
+	while (fgets(line, LINESIZE, file)) {
+		ret = sscanf(line, "# Age=V%d_%d_%d",
+				&major, &minor, &revision);
+		if (ret == 3) {
+			ages_count++;
+			if (verbose > 1)
+				printf(" Age V%d_%d_%d\n",
+					major, minor, revision);
+			if (!age_valid(major, minor, revision))
+				line_fail(age_name, line);
+			continue;
+		}
+		ret = sscanf(line, "# Age=V%d_%d", &major, &minor);
+		if (ret == 2) {
+			ages_count++;
+			if (verbose > 1)
+				printf(" Age V%d_%d\n", major, minor);
+			if (!age_valid(major, minor, 0))
+				line_fail(age_name, line);
+			continue;
+		}
+	}
+
+	/* We must have found something above. */
+	if (verbose > 1)
+		printf("%d age entries\n", ages_count);
+	if (ages_count == 0 || ages_count > MAXGEN)
+		file_fail(age_name);
+
+	/* There is a 0 entry. */
+	ages_count++;
+	ages = calloc(ages_count + 1, sizeof(*ages));
+	/* And a guard entry. */
+	ages[ages_count] = (unsigned int)-1;
+
+	rewind(file);
+	count = 0;
+	gen = 0;
+	while (fgets(line, LINESIZE, file)) {
+		ret = sscanf(line, "# Age=V%d_%d_%d",
+				&major, &minor, &revision);
+		if (ret == 3) {
+			ages[++gen] =
+				UNICODE_AGE(major, minor, revision);
+			if (verbose > 1)
+				printf(" Age V%d_%d_%d = gen %d\n",
+					major, minor, revision, gen);
+			if (!age_valid(major, minor, revision))
+				line_fail(age_name, line);
+			continue;
+		}
+		ret = sscanf(line, "# Age=V%d_%d", &major, &minor);
+		if (ret == 2) {
+			ages[++gen] = UNICODE_AGE(major, minor, 0);
+			if (verbose > 1)
+				printf(" Age V%d_%d = %d\n",
+					major, minor, gen);
+			if (!age_valid(major, minor, 0))
+				line_fail(age_name, line);
+			continue;
+		}
+		ret = sscanf(line, "%X..%X ; %d.%d #",
+			     &first, &last, &major, &minor);
+		if (ret == 4) {
+			for (unichar = first; unichar <= last; unichar++)
+				unicode_data[unichar].gen = gen;
+			count += 1 + last - first;
+			if (verbose > 1)
+				printf("  %X..%X gen %d\n", first, last, gen);
+			if (!utf32valid(first) || !utf32valid(last))
+				line_fail(age_name, line);
+			continue;
+		}
+		ret = sscanf(line, "%X ; %d.%d #", &unichar, &major, &minor);
+		if (ret == 3) {
+			unicode_data[unichar].gen = gen;
+			count++;
+			if (verbose > 1)
+				printf("  %X gen %d\n", unichar, gen);
+			if (!utf32valid(unichar))
+				line_fail(age_name, line);
+			continue;
+		}
+	}
+	unicode_maxage = ages[gen];
+	fclose(file);
+
+	/* Nix surrogate block */
+	if (verbose > 1)
+		printf(" Removing surrogate block D800..DFFF\n");
+	for (unichar = 0xd800; unichar <= 0xdfff; unichar++)
+		unicode_data[unichar].gen = -1;
+
+	if (verbose > 0)
+	        printf("Found %d entries\n", count);
+	if (count == 0)
+		file_fail(age_name);
+}
+
+static void ccc_init(void)
+{
+	FILE *file;
+	unsigned int first;
+	unsigned int last;
+	unsigned int unichar;
+	unsigned int value;
+	int count;
+	int ret;
+
+	if (verbose > 0)
+		printf("Parsing %s\n", ccc_name);
+
+	file = fopen(ccc_name, "r");
+	if (!file)
+		open_fail(ccc_name, errno);
+
+	count = 0;
+	while (fgets(line, LINESIZE, file)) {
+		ret = sscanf(line, "%X..%X ; %d #", &first, &last, &value);
+		if (ret == 3) {
+			for (unichar = first; unichar <= last; unichar++) {
+				unicode_data[unichar].ccc = value;
+                                count++;
+			}
+			if (verbose > 1)
+				printf(" %X..%X ccc %d\n", first, last, value);
+			if (!utf32valid(first) || !utf32valid(last))
+				line_fail(ccc_name, line);
+			continue;
+		}
+		ret = sscanf(line, "%X ; %d #", &unichar, &value);
+		if (ret == 2) {
+			unicode_data[unichar].ccc = value;
+                        count++;
+			if (verbose > 1)
+				printf(" %X ccc %d\n", unichar, value);
+			if (!utf32valid(unichar))
+				line_fail(ccc_name, line);
+			continue;
+		}
+	}
+	fclose(file);
+
+	if (verbose > 0)
+		printf("Found %d entries\n", count);
+	if (count == 0)
+		file_fail(ccc_name);
+}
+
+static int ignore_compatibility_form(char *type)
+{
+	int i;
+	char *ignored_types[] = {"font", "noBreak", "initial", "medial",
+				 "final", "isolated", "circle", "super",
+				 "sub", "vertical", "wide", "narrow",
+				 "small", "square", "fraction", "compat"};
+
+	for (i = 0 ; i < ARRAY_SIZE(ignored_types); i++)
+		if (strcmp(type, ignored_types[i]) == 0)
+			return 1;
+	return 0;
+}
+
+static void nfdi_init(void)
+{
+	FILE *file;
+	unsigned int unichar;
+	unsigned int mapping[19]; /* Magic - guaranteed not to be exceeded. */
+	char *s;
+	char *type;
+	unsigned int *um;
+	int count;
+	int i;
+	int ret;
+
+	if (verbose > 0)
+		printf("Parsing %s\n", data_name);
+	file = fopen(data_name, "r");
+	if (!file)
+		open_fail(data_name, errno);
+
+	count = 0;
+	while (fgets(line, LINESIZE, file)) {
+		ret = sscanf(line, "%X;%*[^;];%*[^;];%*[^;];%*[^;];%[^;];",
+			     &unichar, buf0);
+		if (ret != 2)
+			continue;
+		if (!utf32valid(unichar))
+			line_fail(data_name, line);
+
+		s = buf0;
+		/* skip over <tag> */
+		if (*s == '<') {
+			type = ++s;
+			while (*++s != '>');
+			*s++ = '\0';
+			if(ignore_compatibility_form(type))
+				continue;
+		}
+		/* decode the decomposition into UTF-32 */
+		i = 0;
+		while (*s) {
+			mapping[i] = strtoul(s, &s, 16);
+			if (!utf32valid(mapping[i]))
+				line_fail(data_name, line);
+			i++;
+		}
+		mapping[i++] = 0;
+
+		um = malloc(i * sizeof(unsigned int));
+		memcpy(um, mapping, i * sizeof(unsigned int));
+		unicode_data[unichar].utf32nfdi = um;
+
+		if (verbose > 1)
+			print_utf32nfdi(unichar);
+		count++;
+	}
+	fclose(file);
+	if (verbose > 0)
+		printf("Found %d entries\n", count);
+	if (count == 0)
+		file_fail(data_name);
+}
+
+static void nfdicf_init(void)
+{
+	FILE *file;
+	unsigned int unichar;
+	unsigned int mapping[19]; /* Magic - guaranteed not to be exceeded. */
+	char status;
+	char *s;
+	unsigned int *um;
+	int i;
+	int count;
+	int ret;
+
+	if (verbose > 0)
+		printf("Parsing %s\n", fold_name);
+	file = fopen(fold_name, "r");
+	if (!file)
+		open_fail(fold_name, errno);
+
+	count = 0;
+	while (fgets(line, LINESIZE, file)) {
+		ret = sscanf(line, "%X; %c; %[^;];", &unichar, &status, buf0);
+		if (ret != 3)
+			continue;
+		if (!utf32valid(unichar))
+			line_fail(fold_name, line);
+		/* Use the C+F casefold. */
+		if (status != 'C' && status != 'F')
+			continue;
+		s = buf0;
+		if (*s == '<')
+			while (*s++ != ' ')
+				;
+		i = 0;
+		while (*s) {
+			mapping[i] = strtoul(s, &s, 16);
+			if (!utf32valid(mapping[i]))
+				line_fail(fold_name, line);
+			i++;
+		}
+		mapping[i++] = 0;
+
+		um = malloc(i * sizeof(unsigned int));
+		memcpy(um, mapping, i * sizeof(unsigned int));
+		unicode_data[unichar].utf32nfdicf = um;
+
+		if (verbose > 1)
+			print_utf32nfdicf(unichar);
+		count++;
+	}
+	fclose(file);
+	if (verbose > 0)
+		printf("Found %d entries\n", count);
+	if (count == 0)
+		file_fail(fold_name);
+}
+
+static void ignore_init(void)
+{
+	FILE *file;
+	unsigned int unichar;
+	unsigned int first;
+	unsigned int last;
+	unsigned int *um;
+	int count;
+	int ret;
+
+	if (verbose > 0)
+		printf("Parsing %s\n", prop_name);
+	file = fopen(prop_name, "r");
+	if (!file)
+		open_fail(prop_name, errno);
+	assert(file);
+	count = 0;
+	while (fgets(line, LINESIZE, file)) {
+		ret = sscanf(line, "%X..%X ; %s # ", &first, &last, buf0);
+		if (ret == 3) {
+			if (strcmp(buf0, "Default_Ignorable_Code_Point"))
+				continue;
+			if (!utf32valid(first) || !utf32valid(last))
+				line_fail(prop_name, line);
+			for (unichar = first; unichar <= last; unichar++) {
+				free(unicode_data[unichar].utf32nfdi);
+				um = malloc(sizeof(unsigned int));
+				*um = 0;
+				unicode_data[unichar].utf32nfdi = um;
+				free(unicode_data[unichar].utf32nfdicf);
+				um = malloc(sizeof(unsigned int));
+				*um = 0;
+				unicode_data[unichar].utf32nfdicf = um;
+				count++;
+			}
+			if (verbose > 1)
+				printf(" %X..%X Default_Ignorable_Code_Point\n",
+					first, last);
+			continue;
+		}
+		ret = sscanf(line, "%X ; %s # ", &unichar, buf0);
+		if (ret == 2) {
+			if (strcmp(buf0, "Default_Ignorable_Code_Point"))
+				continue;
+			if (!utf32valid(unichar))
+				line_fail(prop_name, line);
+			free(unicode_data[unichar].utf32nfdi);
+			um = malloc(sizeof(unsigned int));
+			*um = 0;
+			unicode_data[unichar].utf32nfdi = um;
+			free(unicode_data[unichar].utf32nfdicf);
+			um = malloc(sizeof(unsigned int));
+			*um = 0;
+			unicode_data[unichar].utf32nfdicf = um;
+			if (verbose > 1)
+				printf(" %X Default_Ignorable_Code_Point\n",
+					unichar);
+			count++;
+			continue;
+		}
+	}
+	fclose(file);
+
+	if (verbose > 0)
+		printf("Found %d entries\n", count);
+	if (count == 0)
+		file_fail(prop_name);
+}
+
+static void corrections_init(void)
+{
+	FILE *file;
+	unsigned int unichar;
+	unsigned int major;
+	unsigned int minor;
+	unsigned int revision;
+	unsigned int age;
+	unsigned int *um;
+	unsigned int mapping[19]; /* Magic - guaranteed not to be exceeded. */
+	char *s;
+	int i;
+	int count;
+	int ret;
+
+	if (verbose > 0)
+		printf("Parsing %s\n", norm_name);
+	file = fopen(norm_name, "r");
+	if (!file)
+		open_fail(norm_name, errno);
+
+	count = 0;
+	while (fgets(line, LINESIZE, file)) {
+		ret = sscanf(line, "%X;%[^;];%[^;];%d.%d.%d #",
+				&unichar, buf0, buf1,
+				&major, &minor, &revision);
+		if (ret != 6)
+			continue;
+		if (!utf32valid(unichar) || !age_valid(major, minor, revision))
+			line_fail(norm_name, line);
+		count++;
+	}
+	corrections = calloc(count, sizeof(struct unicode_data));
+	corrections_count = count;
+	rewind(file);
+
+	count = 0;
+	while (fgets(line, LINESIZE, file)) {
+		ret = sscanf(line, "%X;%[^;];%[^;];%d.%d.%d #",
+				&unichar, buf0, buf1,
+				&major, &minor, &revision);
+		if (ret != 6)
+			continue;
+		if (!utf32valid(unichar) || !age_valid(major, minor, revision))
+			line_fail(norm_name, line);
+		corrections[count] = unicode_data[unichar];
+		assert(corrections[count].code == unichar);
+		age = UNICODE_AGE(major, minor, revision);
+		corrections[count].correction = age;
+
+		i = 0;
+		s = buf0;
+		while (*s) {
+			mapping[i] = strtoul(s, &s, 16);
+			if (!utf32valid(mapping[i]))
+				line_fail(norm_name, line);
+			i++;
+		}
+		mapping[i++] = 0;
+
+		um = malloc(i * sizeof(unsigned int));
+		memcpy(um, mapping, i * sizeof(unsigned int));
+		corrections[count].utf32nfdi = um;
+
+		if (verbose > 1)
+			printf(" %X -> %s -> %s V%d_%d_%d\n",
+				unichar, buf0, buf1, major, minor, revision);
+		count++;
+	}
+	fclose(file);
+
+	if (verbose > 0)
+	        printf("Found %d entries\n", count);
+	if (count == 0)
+		file_fail(norm_name);
+}
+
+/* ------------------------------------------------------------------ */
+
+/*
+ * Hangul decomposition (algorithm from Section 3.12 of Unicode 6.3.0)
+ *
+ * AC00;<Hangul Syllable, First>;Lo;0;L;;;;;N;;;;;
+ * D7A3;<Hangul Syllable, Last>;Lo;0;L;;;;;N;;;;;
+ *
+ * SBase = 0xAC00
+ * LBase = 0x1100
+ * VBase = 0x1161
+ * TBase = 0x11A7
+ * LCount = 19
+ * VCount = 21
+ * TCount = 28
+ * NCount = 588 (VCount * TCount)
+ * SCount = 11172 (LCount * NCount)
+ *
+ * Decomposition:
+ *   SIndex = s - SBase
+ *
+ * LV (Canonical/Full)
+ *   LIndex = SIndex / NCount
+ *   VIndex = (Sindex % NCount) / TCount
+ *   LPart = LBase + LIndex
+ *   VPart = VBase + VIndex
+ *
+ * LVT (Canonical)
+ *   LVIndex = (SIndex / TCount) * TCount
+ *   TIndex = (Sindex % TCount)
+ *   LVPart = SBase + LVIndex
+ *   TPart = TBase + TIndex
+ *
+ * LVT (Full)
+ *   LIndex = SIndex / NCount
+ *   VIndex = (Sindex % NCount) / TCount
+ *   TIndex = (Sindex % TCount)
+ *   LPart = LBase + LIndex
+ *   VPart = VBase + VIndex
+ *   if (TIndex == 0) {
+ *          d = <LPart, VPart>
+ *   } else {
+ *          TPart = TBase + TIndex
+ *          d = <LPart, VPart, TPart>
+ *   }
+ *
+ */
+
+static void hangul_decompose(void)
+{
+	unsigned int sb = 0xAC00;
+	unsigned int lb = 0x1100;
+	unsigned int vb = 0x1161;
+	unsigned int tb = 0x11a7;
+	/* unsigned int lc = 19; */
+	unsigned int vc = 21;
+	unsigned int tc = 28;
+	unsigned int nc = (vc * tc);
+	/* unsigned int sc = (lc * nc); */
+	unsigned int unichar;
+	unsigned int mapping[4];
+	unsigned int *um;
+        int count;
+	int i;
+
+	if (verbose > 0)
+		printf("Decomposing hangul\n");
+	/* Hangul */
+	count = 0;
+	for (unichar = 0xAC00; unichar <= 0xD7A3; unichar++) {
+		unsigned int si = unichar - sb;
+		unsigned int li = si / nc;
+		unsigned int vi = (si % nc) / tc;
+		unsigned int ti = si % tc;
+
+		i = 0;
+		mapping[i++] = lb + li;
+		mapping[i++] = vb + vi;
+		if (ti)
+			mapping[i++] = tb + ti;
+		mapping[i++] = 0;
+
+		assert(!unicode_data[unichar].utf32nfdi);
+		um = malloc(i * sizeof(unsigned int));
+		memcpy(um, mapping, i * sizeof(unsigned int));
+		unicode_data[unichar].utf32nfdi = um;
+
+		assert(!unicode_data[unichar].utf32nfdicf);
+		um = malloc(i * sizeof(unsigned int));
+		memcpy(um, mapping, i * sizeof(unsigned int));
+		unicode_data[unichar].utf32nfdicf = um;
+
+		/*
+		 * Add a cookie as a reminder that the hangul syllable
+		 * decompositions must not be stored in the generated
+		 * trie.
+		 */
+		unicode_data[unichar].utf8nfdi = malloc(2);
+		unicode_data[unichar].utf8nfdi[0] = HANGUL;
+		unicode_data[unichar].utf8nfdi[1] = '\0';
+
+		if (verbose > 1)
+			print_utf32nfdi(unichar);
+
+		count++;
+	}
+	if (verbose > 0)
+		printf("Created %d entries\n", count);
+}
+
+static void nfdi_decompose(void)
+{
+	unsigned int unichar;
+	unsigned int mapping[19]; /* Magic - guaranteed not to be exceeded. */
+	unsigned int *um;
+	unsigned int *dc;
+	int count;
+	int i;
+	int j;
+	int ret;
+
+	if (verbose > 0)
+		printf("Decomposing nfdi\n");
+
+	count = 0;
+	for (unichar = 0; unichar != 0x110000; unichar++) {
+		if (!unicode_data[unichar].utf32nfdi)
+			continue;
+		for (;;) {
+			ret = 1;
+			i = 0;
+			um = unicode_data[unichar].utf32nfdi;
+			while (*um) {
+				dc = unicode_data[*um].utf32nfdi;
+				if (dc) {
+					for (j = 0; dc[j]; j++)
+						mapping[i++] = dc[j];
+					ret = 0;
+				} else {
+					mapping[i++] = *um;
+				}
+				um++;
+			}
+			mapping[i++] = 0;
+			if (ret)
+				break;
+			free(unicode_data[unichar].utf32nfdi);
+			um = malloc(i * sizeof(unsigned int));
+			memcpy(um, mapping, i * sizeof(unsigned int));
+			unicode_data[unichar].utf32nfdi = um;
+		}
+		/* Add this decomposition to nfdicf if there is no entry. */
+		if (!unicode_data[unichar].utf32nfdicf) {
+			um = malloc(i * sizeof(unsigned int));
+			memcpy(um, mapping, i * sizeof(unsigned int));
+			unicode_data[unichar].utf32nfdicf = um;
+		}
+		if (verbose > 1)
+			print_utf32nfdi(unichar);
+		count++;
+	}
+	if (verbose > 0)
+		printf("Processed %d entries\n", count);
+}
+
+static void nfdicf_decompose(void)
+{
+	unsigned int unichar;
+	unsigned int mapping[19]; /* Magic - guaranteed not to be exceeded. */
+	unsigned int *um;
+	unsigned int *dc;
+	int count;
+	int i;
+	int j;
+	int ret;
+
+	if (verbose > 0)
+		printf("Decomposing nfdicf\n");
+	count = 0;
+	for (unichar = 0; unichar != 0x110000; unichar++) {
+		if (!unicode_data[unichar].utf32nfdicf)
+			continue;
+		for (;;) {
+			ret = 1;
+			i = 0;
+			um = unicode_data[unichar].utf32nfdicf;
+			while (*um) {
+				dc = unicode_data[*um].utf32nfdicf;
+				if (dc) {
+					for (j = 0; dc[j]; j++)
+						mapping[i++] = dc[j];
+					ret = 0;
+				} else {
+					mapping[i++] = *um;
+				}
+				um++;
+			}
+			mapping[i++] = 0;
+			if (ret)
+				break;
+			free(unicode_data[unichar].utf32nfdicf);
+			um = malloc(i * sizeof(unsigned int));
+			memcpy(um, mapping, i * sizeof(unsigned int));
+			unicode_data[unichar].utf32nfdicf = um;
+		}
+		if (verbose > 1)
+			print_utf32nfdicf(unichar);
+		count++;
+	}
+	if (verbose > 0)
+		printf("Processed %d entries\n", count);
+}
+
+/* ------------------------------------------------------------------ */
+
+int utf8agemax(struct tree *, const char *);
+int utf8nagemax(struct tree *, const char *, size_t);
+int utf8agemin(struct tree *, const char *);
+int utf8nagemin(struct tree *, const char *, size_t);
+ssize_t utf8len(struct tree *, const char *);
+ssize_t utf8nlen(struct tree *, const char *, size_t);
+struct utf8cursor;
+int utf8cursor(struct utf8cursor *, struct tree *, const char *);
+int utf8ncursor(struct utf8cursor *, struct tree *, const char *, size_t);
+int utf8byte(struct utf8cursor *);
+
+/*
+ * Hangul decomposition (algorithm from Section 3.12 of Unicode 6.3.0)
+ *
+ * AC00;<Hangul Syllable, First>;Lo;0;L;;;;;N;;;;;
+ * D7A3;<Hangul Syllable, Last>;Lo;0;L;;;;;N;;;;;
+ *
+ * SBase = 0xAC00
+ * LBase = 0x1100
+ * VBase = 0x1161
+ * TBase = 0x11A7
+ * LCount = 19
+ * VCount = 21
+ * TCount = 28
+ * NCount = 588 (VCount * TCount)
+ * SCount = 11172 (LCount * NCount)
+ *
+ * Decomposition:
+ *   SIndex = s - SBase
+ *
+ * LV (Canonical/Full)
+ *   LIndex = SIndex / NCount
+ *   VIndex = (Sindex % NCount) / TCount
+ *   LPart = LBase + LIndex
+ *   VPart = VBase + VIndex
+ *
+ * LVT (Canonical)
+ *   LVIndex = (SIndex / TCount) * TCount
+ *   TIndex = (Sindex % TCount)
+ *   LVPart = SBase + LVIndex
+ *   TPart = TBase + TIndex
+ *
+ * LVT (Full)
+ *   LIndex = SIndex / NCount
+ *   VIndex = (Sindex % NCount) / TCount
+ *   TIndex = (Sindex % TCount)
+ *   LPart = LBase + LIndex
+ *   VPart = VBase + VIndex
+ *   if (TIndex == 0) {
+ *          d = <LPart, VPart>
+ *   } else {
+ *          TPart = TBase + TIndex
+ *          d = <LPart, VPart, TPart>
+ *   }
+ */
+
+/* Constants */
+#define SB	(0xAC00)
+#define LB	(0x1100)
+#define VB	(0x1161)
+#define TB	(0x11A7)
+#define LC	(19)
+#define VC	(21)
+#define TC	(28)
+#define NC	(VC * TC)
+#define SC	(LC * NC)
+
+/* Algorithmic decomposition of hangul syllable. */
+static utf8leaf_t *utf8hangul(const char *str, unsigned char *hangul)
+{
+	unsigned int	si;
+	unsigned int	li;
+	unsigned int	vi;
+	unsigned int	ti;
+	unsigned char	*h;
+
+	/* Calculate the SI, LI, VI, and TI values. */
+	si = utf8decode(str) - SB;
+	li = si / NC;
+	vi = (si % NC) / TC;
+	ti = si % TC;
+
+	/* Fill in base of leaf. */
+	h = hangul;
+	LEAF_GEN(h) = 2;
+	LEAF_CCC(h) = DECOMPOSE;
+	h += 2;
+
+	/* Add LPart, a 3-byte UTF-8 sequence. */
+	h += utf8encode((char *)h, li + LB);
+
+	/* Add VPart, a 3-byte UTF-8 sequence. */
+	h += utf8encode((char *)h, vi + VB);
+
+	/* Add TPart if required, also a 3-byte UTF-8 sequence. */
+	if (ti)
+		h += utf8encode((char *)h, ti + TB);
+
+	/* Terminate string. */
+	h[0] = '\0';
+
+	return hangul;
+}
+
+/*
+ * Use trie to scan s, touching at most len bytes.
+ * Returns the leaf if one exists, NULL otherwise.
+ *
+ * A non-NULL return guarantees that the UTF-8 sequence starting at s
+ * is well-formed and corresponds to a known unicode code point.  The
+ * shorthand for this will be "is valid UTF-8 unicode".
+ */
+static utf8leaf_t *utf8nlookup(struct tree *tree, unsigned char *hangul,
+			       const char *s, size_t len)
+{
+	utf8trie_t	*trie;
+	int		offlen;
+	int		offset;
+	int		mask;
+	int		node;
+
+	if (!tree)
+		return NULL;
+	if (len == 0)
+		return NULL;
+	node = 1;
+	trie = utf8data + tree->index;
+	while (node) {
+		offlen = (*trie & OFFLEN) >> OFFLEN_SHIFT;
+		if (*trie & NEXTBYTE) {
+			if (--len == 0)
+				return NULL;
+			s++;
+		}
+		mask = 1 << (*trie & BITNUM);
+		if (*s & mask) {
+			/* Right leg */
+			if (offlen) {
+				/* Right node at offset of trie */
+				node = (*trie & RIGHTNODE);
+				offset = trie[offlen];
+				while (--offlen) {
+					offset <<= 8;
+					offset |= trie[offlen];
+				}
+				trie += offset;
+			} else if (*trie & RIGHTPATH) {
+				/* Right node after this node */
+				node = (*trie & TRIENODE);
+				trie++;
+			} else {
+				/* No right node. */
+				return NULL;
+			}
+		} else {
+			/* Left leg */
+			if (offlen) {
+				/* Left node after this node. */
+				node = (*trie & LEFTNODE);
+				trie += offlen + 1;
+			} else if (*trie & RIGHTPATH) {
+				/* No left node. */
+				return NULL;
+			} else {
+				/* Left node after this node */
+				node = (*trie & TRIENODE);
+				trie++;
+			}
+		}
+	}
+	/*
+	 * Hangul decomposition is done algorithmically. These are the
+	 * codepoints >= 0xAC00 and <= 0xD7A3. Their UTF-8 encoding is
+	 * always 3 bytes long, so s has been advanced twice, and the
+	 * start of the sequence is at s-2.
+	 */
+	if (LEAF_CCC(trie) == DECOMPOSE && LEAF_STR(trie)[0] == HANGUL)
+		trie = utf8hangul(s - 2, hangul);
+	return trie;
+}
+
+/*
+ * Use trie to scan s.
+ * Returns the leaf if one exists, NULL otherwise.
+ *
+ * Forwards to trie_nlookup().
+ */
+static utf8leaf_t *utf8lookup(struct tree *tree, unsigned char *hangul,
+			      const char *s)
+{
+	return utf8nlookup(tree, hangul, s, (size_t)-1);
+}
+
+/*
+ * Return the number of bytes used by the current UTF-8 sequence.
+ * Assumes the input points to the first byte of a valid UTF-8
+ * sequence.
+ */
+static inline int utf8clen(const char *s)
+{
+	unsigned char c = *s;
+	return 1 + (c >= 0xC0) + (c >= 0xE0) + (c >= 0xF0);
+}
+
+/*
+ * Maximum age of any character in s.
+ * Return -1 if s is not valid UTF-8 unicode.
+ * Return 0 if only non-assigned code points are used.
+ */
+int utf8agemax(struct tree *tree, const char *s)
+{
+	utf8leaf_t	*leaf;
+	int		age = 0;
+	int		leaf_age;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!tree)
+		return -1;
+
+	while (*s) {
+		leaf = utf8lookup(tree, hangul, s);
+		if (!leaf)
+			return -1;
+		leaf_age = ages[LEAF_GEN(leaf)];
+		if (leaf_age <= tree->maxage && leaf_age > age)
+			age = leaf_age;
+		s += utf8clen(s);
+	}
+	return age;
+}
+
+/*
+ * Minimum age of any character in s.
+ * Return -1 if s is not valid UTF-8 unicode.
+ * Return 0 if non-assigned code points are used.
+ */
+int utf8agemin(struct tree *tree, const char *s)
+{
+	utf8leaf_t	*leaf;
+	int		age;
+	int		leaf_age;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!tree)
+		return -1;
+	age = tree->maxage;
+	while (*s) {
+		leaf = utf8lookup(tree, hangul, s);
+		if (!leaf)
+			return -1;
+		leaf_age = ages[LEAF_GEN(leaf)];
+		if (leaf_age <= tree->maxage && leaf_age < age)
+			age = leaf_age;
+		s += utf8clen(s);
+	}
+	return age;
+}
+
+/*
+ * Maximum age of any character in s, touch at most len bytes.
+ * Return -1 if s is not valid UTF-8 unicode.
+ */
+int utf8nagemax(struct tree *tree, const char *s, size_t len)
+{
+	utf8leaf_t	*leaf;
+	int		age = 0;
+	int		leaf_age;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!tree)
+		return -1;
+
+        while (len && *s) {
+		leaf = utf8nlookup(tree, hangul, s, len);
+		if (!leaf)
+			return -1;
+		leaf_age = ages[LEAF_GEN(leaf)];
+		if (leaf_age <= tree->maxage && leaf_age > age)
+			age = leaf_age;
+		len -= utf8clen(s);
+		s += utf8clen(s);
+	}
+	return age;
+}
+
+/*
+ * Maximum age of any character in s, touch at most len bytes.
+ * Return -1 if s is not valid UTF-8 unicode.
+ */
+int utf8nagemin(struct tree *tree, const char *s, size_t len)
+{
+	utf8leaf_t	*leaf;
+	int		leaf_age;
+	int		age;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!tree)
+		return -1;
+	age = tree->maxage;
+        while (len && *s) {
+		leaf = utf8nlookup(tree, hangul, s, len);
+		if (!leaf)
+			return -1;
+		leaf_age = ages[LEAF_GEN(leaf)];
+		if (leaf_age <= tree->maxage && leaf_age < age)
+			age = leaf_age;
+		len -= utf8clen(s);
+		s += utf8clen(s);
+	}
+	return age;
+}
+
+/*
+ * Length of the normalization of s.
+ * Return -1 if s is not valid UTF-8 unicode.
+ *
+ * A string of Default_Ignorable_Code_Point has length 0.
+ */
+ssize_t utf8len(struct tree *tree, const char *s)
+{
+	utf8leaf_t	*leaf;
+	size_t		ret = 0;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!tree)
+		return -1;
+	while (*s) {
+		leaf = utf8lookup(tree, hangul, s);
+		if (!leaf)
+			return -1;
+		if (ages[LEAF_GEN(leaf)] > tree->maxage)
+			ret += utf8clen(s);
+		else if (LEAF_CCC(leaf) == DECOMPOSE)
+			ret += strlen(LEAF_STR(leaf));
+		else
+			ret += utf8clen(s);
+		s += utf8clen(s);
+	}
+	return ret;
+}
+
+/*
+ * Length of the normalization of s, touch at most len bytes.
+ * Return -1 if s is not valid UTF-8 unicode.
+ */
+ssize_t utf8nlen(struct tree *tree, const char *s, size_t len)
+{
+	utf8leaf_t	*leaf;
+	size_t		ret = 0;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!tree)
+		return -1;
+	while (len && *s) {
+		leaf = utf8nlookup(tree, hangul, s, len);
+		if (!leaf)
+			return -1;
+		if (ages[LEAF_GEN(leaf)] > tree->maxage)
+			ret += utf8clen(s);
+		else if (LEAF_CCC(leaf) == DECOMPOSE)
+			ret += strlen(LEAF_STR(leaf));
+		else
+			ret += utf8clen(s);
+		len -= utf8clen(s);
+		s += utf8clen(s);
+	}
+	return ret;
+}
+
+/*
+ * Cursor structure used by the normalizer.
+ */
+struct utf8cursor {
+	struct tree	*tree;
+	const char	*s;
+	const char	*p;
+	const char	*ss;
+	const char	*sp;
+	unsigned int	len;
+	unsigned int	slen;
+	short int	ccc;
+	short int	nccc;
+	unsigned int	unichar;
+	unsigned char	hangul[UTF8HANGULLEAF];
+};
+
+/*
+ * Set up an utf8cursor for use by utf8byte().
+ *
+ *   s      : string.
+ *   len    : length of s.
+ *   u8c    : pointer to cursor.
+ *   trie   : utf8trie_t to use for normalization.
+ *
+ * Returns -1 on error, 0 on success.
+ */
+int utf8ncursor(struct utf8cursor *u8c, struct tree *tree, const char *s,
+		size_t len)
+{
+	if (!tree)
+		return -1;
+	if (!s)
+		return -1;
+	u8c->tree = tree;
+	u8c->s = s;
+	u8c->p = NULL;
+	u8c->ss = NULL;
+	u8c->sp = NULL;
+	u8c->len = len;
+	u8c->slen = 0;
+	u8c->ccc = STOPPER;
+	u8c->nccc = STOPPER;
+	u8c->unichar = 0;
+	/* Check we didn't clobber the maximum length. */
+	if (u8c->len != len)
+		return -1;
+	/* The first byte of s may not be an utf8 continuation. */
+	if (len > 0 && (*s & 0xC0) == 0x80)
+		return -1;
+	return 0;
+}
+
+/*
+ * Set up an utf8cursor for use by utf8byte().
+ *
+ *   s      : NUL-terminated string.
+ *   u8c    : pointer to cursor.
+ *   trie   : utf8trie_t to use for normalization.
+ *
+ * Returns -1 on error, 0 on success.
+ */
+int utf8cursor(struct utf8cursor *u8c, struct tree *tree, const char *s)
+{
+	return utf8ncursor(u8c, tree, s, (unsigned int)-1);
+}
+
+/*
+ * Get one byte from the normalized form of the string described by u8c.
+ *
+ * Returns the byte cast to an unsigned char on succes, and -1 on failure.
+ *
+ * The cursor keeps track of the location in the string in u8c->s.
+ * When a character is decomposed, the current location is stored in
+ * u8c->p, and u8c->s is set to the start of the decomposition. Note
+ * that bytes from a decomposition do not count against u8c->len.
+ *
+ * Characters are emitted if they match the current CCC in u8c->ccc.
+ * Hitting end-of-string while u8c->ccc == STOPPER means we're done,
+ * and the function returns 0 in that case.
+ *
+ * Sorting by CCC is done by repeatedly scanning the string.  The
+ * values of u8c->s and u8c->p are stored in u8c->ss and u8c->sp at
+ * the start of the scan.  The first pass finds the lowest CCC to be
+ * emitted and stores it in u8c->nccc, the second pass emits the
+ * characters with this CCC and finds the next lowest CCC. This limits
+ * the number of passes to 1 + the number of different CCCs in the
+ * sequence being scanned.
+ *
+ * Therefore:
+ *  u8c->p  != NULL -> a decomposition is being scanned.
+ *  u8c->ss != NULL -> this is a repeating scan.
+ *  u8c->ccc == -1  -> this is the first scan of a repeating scan.
+ */
+int utf8byte(struct utf8cursor *u8c)
+{
+	utf8leaf_t *leaf;
+	int ccc;
+
+	for (;;) {
+		/* Check for the end of a decomposed character. */
+		if (u8c->p && *u8c->s == '\0') {
+			u8c->s = u8c->p;
+			u8c->p = NULL;
+		}
+
+		/* Check for end-of-string. */
+		if (!u8c->p && (u8c->len == 0 || *u8c->s == '\0')) {
+			/* There is no next byte. */
+			if (u8c->ccc == STOPPER)
+				return 0;
+			/* End-of-string during a scan counts as a stopper. */
+			ccc = STOPPER;
+			goto ccc_mismatch;
+		} else if ((*u8c->s & 0xC0) == 0x80) {
+			/* This is a continuation of the current character. */
+			if (!u8c->p)
+				u8c->len--;
+			return (unsigned char)*u8c->s++;
+		}
+
+		/* Look up the data for the current character. */
+		if (u8c->p) {
+			leaf = utf8lookup(u8c->tree, u8c->hangul, u8c->s);
+		} else {
+			leaf = utf8nlookup(u8c->tree, u8c->hangul,
+					   u8c->s, u8c->len);
+		}
+
+		/* No leaf found implies that the input is a binary blob. */
+		if (!leaf)
+			return -1;
+
+		/* Characters that are too new have CCC 0. */
+		if (ages[LEAF_GEN(leaf)] > u8c->tree->maxage) {
+			ccc = STOPPER;
+		} else if ((ccc = LEAF_CCC(leaf)) == DECOMPOSE) {
+			u8c->len -= utf8clen(u8c->s);
+			u8c->p = u8c->s + utf8clen(u8c->s);
+			u8c->s = LEAF_STR(leaf);
+			/* Empty decomposition implies CCC 0. */
+			if (*u8c->s == '\0') {
+				if (u8c->ccc == STOPPER)
+					continue;
+				ccc = STOPPER;
+				goto ccc_mismatch;
+			}
+			leaf = utf8lookup(u8c->tree, u8c->hangul, u8c->s);
+			ccc = LEAF_CCC(leaf);
+		}
+		u8c->unichar = utf8decode(u8c->s);
+
+		/*
+		 * If this is not a stopper, then see if it updates
+		 * the next canonical class to be emitted.
+		 */
+		if (ccc != STOPPER && u8c->ccc < ccc && ccc < u8c->nccc)
+			u8c->nccc = ccc;
+
+		/*
+		 * Return the current byte if this is the current
+		 * combining class.
+		 */
+		if (ccc == u8c->ccc) {
+			if (!u8c->p)
+				u8c->len--;
+			return (unsigned char)*u8c->s++;
+		}
+
+		/* Current combining class mismatch. */
+	ccc_mismatch:
+		if (u8c->nccc == STOPPER) {
+			/*
+			 * Scan forward for the first canonical class
+			 * to be emitted.  Save the position from
+			 * which to restart.
+			 */
+			assert(u8c->ccc == STOPPER);
+			u8c->ccc = MINCCC - 1;
+			u8c->nccc = ccc;
+			u8c->sp = u8c->p;
+			u8c->ss = u8c->s;
+			u8c->slen = u8c->len;
+			if (!u8c->p)
+				u8c->len -= utf8clen(u8c->s);
+			u8c->s += utf8clen(u8c->s);
+		} else if (ccc != STOPPER) {
+			/* Not a stopper, and not the ccc we're emitting. */
+			if (!u8c->p)
+				u8c->len -= utf8clen(u8c->s);
+			u8c->s += utf8clen(u8c->s);
+		} else if (u8c->nccc != MAXCCC + 1) {
+			/* At a stopper, restart for next ccc. */
+			u8c->ccc = u8c->nccc;
+			u8c->nccc = MAXCCC + 1;
+			u8c->s = u8c->ss;
+			u8c->p = u8c->sp;
+			u8c->len = u8c->slen;
+		} else {
+			/* All done, proceed from here. */
+			u8c->ccc = STOPPER;
+			u8c->nccc = STOPPER;
+			u8c->sp = NULL;
+			u8c->ss = NULL;
+			u8c->slen = 0;
+		}
+	}
+}
+
+/* ------------------------------------------------------------------ */
+
+static int normalize_line(struct tree *tree)
+{
+	char *s;
+	char *t;
+	int c;
+	struct utf8cursor u8c;
+
+	/* First test: null-terminated string. */
+	s = buf2;
+	t = buf3;
+	if (utf8cursor(&u8c, tree, s))
+		return -1;
+	while ((c = utf8byte(&u8c)) > 0)
+		if (c != (unsigned char)*t++)
+			return -1;
+	if (c < 0)
+		return -1;
+	if (*t != 0)
+		return -1;
+
+	/* Second test: length-limited string. */
+	s = buf2;
+	/* Replace NUL with a value that will cause an error if seen. */
+	s[strlen(s) + 1] = -1;
+	t = buf3;
+	if (utf8cursor(&u8c, tree, s))
+		return -1;
+	while ((c = utf8byte(&u8c)) > 0)
+		if (c != (unsigned char)*t++)
+			return -1;
+	if (c < 0)
+		return -1;
+	if (*t != 0)
+		return -1;
+
+	return 0;
+}
+
+static void normalization_test(void)
+{
+	FILE *file;
+	unsigned int unichar;
+	struct unicode_data *data;
+	char *s;
+	char *t;
+	int ret;
+	int ignorables;
+	int tests = 0;
+	int failures = 0;
+
+	if (verbose > 0)
+		printf("Parsing %s\n", test_name);
+	/* Step one, read data from file. */
+	file = fopen(test_name, "r");
+	if (!file)
+		open_fail(test_name, errno);
+
+	while (fgets(line, LINESIZE, file)) {
+		ret = sscanf(line, "%[^;];%*[^;];%[^;];%*[^;];%*[^;];",
+			     buf0, buf1);
+		if (ret != 2 || *line == '#')
+			continue;
+		s = buf0;
+		t = buf2;
+		while (*s) {
+			unichar = strtoul(s, &s, 16);
+			t += utf8encode(t, unichar);
+		}
+		*t = '\0';
+
+		ignorables = 0;
+		s = buf1;
+		t = buf3;
+		while (*s) {
+			unichar = strtoul(s, &s, 16);
+			data = &unicode_data[unichar];
+			if (data->utf8nfdi && !*data->utf8nfdi)
+				ignorables = 1;
+			else
+				t += utf8encode(t, unichar);
+		}
+		*t = '\0';
+
+		tests++;
+		if (normalize_line(nfdi_tree) < 0) {
+			printf("Line %s -> %s", buf0, buf1);
+			if (ignorables)
+				printf(" (ignorables removed)");
+			printf(" failure\n");
+			failures++;
+		}
+	}
+	fclose(file);
+	if (verbose > 0)
+		printf("Ran %d tests with %d failures\n", tests, failures);
+	if (failures)
+		file_fail(test_name);
+}
+
+/* ------------------------------------------------------------------ */
+
+static void write_file(void)
+{
+	FILE *file;
+	int i;
+	int j;
+	int t;
+	int gen;
+
+	if (verbose > 0)
+		printf("Writing %s\n", utf8_name);
+	file = fopen(utf8_name, "w");
+	if (!file)
+		open_fail(utf8_name, errno);
+
+	fprintf(file, "/* This file is generated code, do not edit. */\n");
+	fprintf(file, "#ifndef __INCLUDED_FROM_UTF8NORM_C__\n");
+	fprintf(file, "#error Only nls_utf8-norm.c should include this file.\n");
+	fprintf(file, "#endif\n");
+	fprintf(file, "\n");
+	fprintf(file, "static const unsigned int utf8vers = %#x;\n",
+		unicode_maxage);
+	fprintf(file, "\n");
+	fprintf(file, "static const unsigned int utf8agetab[] = {\n");
+	for (i = 0; i != ages_count; i++)
+		fprintf(file, "\t%#x%s\n", ages[i],
+			ages[i] == unicode_maxage ? "" : ",");
+	fprintf(file, "};\n");
+	fprintf(file, "\n");
+	fprintf(file, "static const struct utf8data utf8nfdicfdata[] = {\n");
+	t = 0;
+	for (gen = 0; gen < ages_count; gen++) {
+		fprintf(file, "\t{ %#x, %d }%s\n",
+			ages[gen], trees[t].index,
+			ages[gen] == unicode_maxage ? "" : ",");
+		if (trees[t].maxage == ages[gen])
+			t += 2;
+	}
+	fprintf(file, "};\n");
+	fprintf(file, "\n");
+	fprintf(file, "static const struct utf8data utf8nfdidata[] = {\n");
+	t = 1;
+	for (gen = 0; gen < ages_count; gen++) {
+		fprintf(file, "\t{ %#x, %d }%s\n",
+			ages[gen], trees[t].index,
+			ages[gen] == unicode_maxage ? "" : ",");
+		if (trees[t].maxage == ages[gen])
+			t += 2;
+	}
+	fprintf(file, "};\n");
+	fprintf(file, "\n");
+	fprintf(file, "static const unsigned char utf8data[%zd] = {\n",
+		utf8data_size);
+	t = 0;
+	for (i = 0; i != utf8data_size; i += 16) {
+		if (i == trees[t].index) {
+			fprintf(file, "\t/* %s_%x */\n",
+				trees[t].type, trees[t].maxage);
+			if (t < trees_count-1)
+				t++;
+		}
+		fprintf(file, "\t");
+		for (j = i; j != i + 16; j++)
+			fprintf(file, "0x%.2x%s", utf8data[j],
+				(j < utf8data_size -1 ? "," : ""));
+		fprintf(file, "\n");
+	}
+	fprintf(file, "};\n");
+	fclose(file);
+}
+
+/* ------------------------------------------------------------------ */
+
+int main(int argc, char *argv[])
+{
+	unsigned int unichar;
+	int opt;
+
+	argv0 = argv[0];
+
+	while ((opt = getopt(argc, argv, "a:c:d:f:hn:o:p:t:v")) != -1) {
+		switch (opt) {
+		case 'a':
+			age_name = optarg;
+			break;
+		case 'c':
+			ccc_name = optarg;
+			break;
+		case 'd':
+			data_name = optarg;
+			break;
+		case 'f':
+			fold_name = optarg;
+			break;
+		case 'n':
+			norm_name = optarg;
+			break;
+		case 'o':
+			utf8_name = optarg;
+			break;
+		case 'p':
+			prop_name = optarg;
+			break;
+		case 't':
+			test_name = optarg;
+			break;
+		case 'v':
+			verbose++;
+			break;
+		case 'h':
+			help();
+			exit(0);
+		default:
+			usage();
+		}
+	}
+
+	if (verbose > 1)
+		help();
+	for (unichar = 0; unichar != 0x110000; unichar++)
+		unicode_data[unichar].code = unichar;
+	age_init();
+	ccc_init();
+	nfdi_init();
+	nfdicf_init();
+	ignore_init();
+	corrections_init();
+	hangul_decompose();
+	nfdi_decompose();
+	nfdicf_decompose();
+	utf8_init();
+	trees_init();
+	trees_populate();
+	trees_reduce();
+	trees_verify();
+	/* Prevent "unused function" warning. */
+	(void)lookup(nfdi_tree, " ");
+	if (verbose > 2)
+		tree_walk(nfdi_tree);
+	if (verbose > 2)
+		tree_walk(nfdicf_tree);
+	normalization_test();
+	write_file();
+
+	return 0;
+}
diff --git a/fs/unicode/utf8-core.c b/fs/unicode/utf8-core.c
new file mode 100644
index 000000000000..71ca4d047d65
--- /dev/null
+++ b/fs/unicode/utf8-core.c
@@ -0,0 +1,215 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/parser.h>
+#include <linux/errno.h>
+#include <linux/unicode.h>
+
+#include "utf8n.h"
+
+int utf8_validate(const struct unicode_map *um, const struct qstr *str)
+{
+	const struct utf8data *data = utf8nfdi(um->version);
+
+	if (utf8nlen(data, str->name, str->len) < 0)
+		return -1;
+	return 0;
+}
+EXPORT_SYMBOL(utf8_validate);
+
+int utf8_strncmp(const struct unicode_map *um,
+		 const struct qstr *s1, const struct qstr *s2)
+{
+	const struct utf8data *data = utf8nfdi(um->version);
+	struct utf8cursor cur1, cur2;
+	int c1, c2;
+
+	if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
+		return -EINVAL;
+
+	if (utf8ncursor(&cur2, data, s2->name, s2->len) < 0)
+		return -EINVAL;
+
+	do {
+		c1 = utf8byte(&cur1);
+		c2 = utf8byte(&cur2);
+
+		if (c1 < 0 || c2 < 0)
+			return -EINVAL;
+		if (c1 != c2)
+			return 1;
+	} while (c1);
+
+	return 0;
+}
+EXPORT_SYMBOL(utf8_strncmp);
+
+int utf8_strncasecmp(const struct unicode_map *um,
+		     const struct qstr *s1, const struct qstr *s2)
+{
+	const struct utf8data *data = utf8nfdicf(um->version);
+	struct utf8cursor cur1, cur2;
+	int c1, c2;
+
+	if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
+		return -EINVAL;
+
+	if (utf8ncursor(&cur2, data, s2->name, s2->len) < 0)
+		return -EINVAL;
+
+	do {
+		c1 = utf8byte(&cur1);
+		c2 = utf8byte(&cur2);
+
+		if (c1 < 0 || c2 < 0)
+			return -EINVAL;
+		if (c1 != c2)
+			return 1;
+	} while (c1);
+
+	return 0;
+}
+EXPORT_SYMBOL(utf8_strncasecmp);
+
+/* String cf is expected to be a valid UTF-8 casefolded
+ * string.
+ */
+int utf8_strncasecmp_folded(const struct unicode_map *um,
+			    const struct qstr *cf,
+			    const struct qstr *s1)
+{
+	const struct utf8data *data = utf8nfdicf(um->version);
+	struct utf8cursor cur1;
+	int c1, c2;
+	int i = 0;
+
+	if (utf8ncursor(&cur1, data, s1->name, s1->len) < 0)
+		return -EINVAL;
+
+	do {
+		c1 = utf8byte(&cur1);
+		c2 = cf->name[i++];
+		if (c1 < 0)
+			return -EINVAL;
+		if (c1 != c2)
+			return 1;
+	} while (c1);
+
+	return 0;
+}
+EXPORT_SYMBOL(utf8_strncasecmp_folded);
+
+int utf8_casefold(const struct unicode_map *um, const struct qstr *str,
+		  unsigned char *dest, size_t dlen)
+{
+	const struct utf8data *data = utf8nfdicf(um->version);
+	struct utf8cursor cur;
+	size_t nlen = 0;
+
+	if (utf8ncursor(&cur, data, str->name, str->len) < 0)
+		return -EINVAL;
+
+	for (nlen = 0; nlen < dlen; nlen++) {
+		int c = utf8byte(&cur);
+
+		dest[nlen] = c;
+		if (!c)
+			return nlen;
+		if (c == -1)
+			break;
+	}
+	return -EINVAL;
+}
+
+EXPORT_SYMBOL(utf8_casefold);
+
+int utf8_normalize(const struct unicode_map *um, const struct qstr *str,
+		   unsigned char *dest, size_t dlen)
+{
+	const struct utf8data *data = utf8nfdi(um->version);
+	struct utf8cursor cur;
+	ssize_t nlen = 0;
+
+	if (utf8ncursor(&cur, data, str->name, str->len) < 0)
+		return -EINVAL;
+
+	for (nlen = 0; nlen < dlen; nlen++) {
+		int c = utf8byte(&cur);
+
+		dest[nlen] = c;
+		if (!c)
+			return nlen;
+		if (c == -1)
+			break;
+	}
+	return -EINVAL;
+}
+
+EXPORT_SYMBOL(utf8_normalize);
+
+static int utf8_parse_version(const char *version, unsigned int *maj,
+			      unsigned int *min, unsigned int *rev)
+{
+	substring_t args[3];
+	char version_string[12];
+	const struct match_token token[] = {
+		{1, "%d.%d.%d"},
+		{0, NULL}
+	};
+
+	strncpy(version_string, version, sizeof(version_string));
+
+	if (match_token(version_string, token, args) != 1)
+		return -EINVAL;
+
+	if (match_int(&args[0], maj) || match_int(&args[1], min) ||
+	    match_int(&args[2], rev))
+		return -EINVAL;
+
+	return 0;
+}
+
+struct unicode_map *utf8_load(const char *version)
+{
+	struct unicode_map *um = NULL;
+	int unicode_version;
+
+	if (version) {
+		unsigned int maj, min, rev;
+
+		if (utf8_parse_version(version, &maj, &min, &rev) < 0)
+			return ERR_PTR(-EINVAL);
+
+		if (!utf8version_is_supported(maj, min, rev))
+			return ERR_PTR(-EINVAL);
+
+		unicode_version = UNICODE_AGE(maj, min, rev);
+	} else {
+		unicode_version = utf8version_latest();
+		printk(KERN_WARNING"UTF-8 version not specified. "
+		       "Assuming latest supported version (%d.%d.%d).",
+		       (unicode_version >> 16) & 0xff,
+		       (unicode_version >> 8) & 0xff,
+		       (unicode_version & 0xff));
+	}
+
+	um = kzalloc(sizeof(struct unicode_map), GFP_KERNEL);
+	if (!um)
+		return ERR_PTR(-ENOMEM);
+
+	um->charset = "UTF-8";
+	um->version = unicode_version;
+
+	return um;
+}
+EXPORT_SYMBOL(utf8_load);
+
+void utf8_unload(struct unicode_map *um)
+{
+	kfree(um);
+}
+EXPORT_SYMBOL(utf8_unload);
+
+MODULE_LICENSE("GPL v2");
diff --git a/fs/unicode/utf8-norm.c b/fs/unicode/utf8-norm.c
new file mode 100644
index 000000000000..1d2d2e5b906a
--- /dev/null
+++ b/fs/unicode/utf8-norm.c
@@ -0,0 +1,792 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright (c) 2014 SGI.
+ * All rights reserved.
+ */
+
+#include "utf8n.h"
+
+struct utf8data {
+	unsigned int maxage;
+	unsigned int offset;
+};
+
+#define __INCLUDED_FROM_UTF8NORM_C__
+#include "utf8data.h"
+#undef __INCLUDED_FROM_UTF8NORM_C__
+
+int utf8version_is_supported(u8 maj, u8 min, u8 rev)
+{
+	int i = ARRAY_SIZE(utf8agetab) - 1;
+	unsigned int sb_utf8version = UNICODE_AGE(maj, min, rev);
+
+	while (i >= 0 && utf8agetab[i] != 0) {
+		if (sb_utf8version == utf8agetab[i])
+			return 1;
+		i--;
+	}
+	return 0;
+}
+EXPORT_SYMBOL(utf8version_is_supported);
+
+int utf8version_latest(void)
+{
+	return utf8vers;
+}
+EXPORT_SYMBOL(utf8version_latest);
+
+/*
+ * UTF-8 valid ranges.
+ *
+ * The UTF-8 encoding spreads the bits of a 32bit word over several
+ * bytes. This table gives the ranges that can be held and how they'd
+ * be represented.
+ *
+ * 0x00000000 0x0000007F: 0xxxxxxx
+ * 0x00000000 0x000007FF: 110xxxxx 10xxxxxx
+ * 0x00000000 0x0000FFFF: 1110xxxx 10xxxxxx 10xxxxxx
+ * 0x00000000 0x001FFFFF: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 0x00000000 0x03FFFFFF: 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 0x00000000 0x7FFFFFFF: 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ *
+ * There is an additional requirement on UTF-8, in that only the
+ * shortest representation of a 32bit value is to be used.  A decoder
+ * must not decode sequences that do not satisfy this requirement.
+ * Thus the allowed ranges have a lower bound.
+ *
+ * 0x00000000 0x0000007F: 0xxxxxxx
+ * 0x00000080 0x000007FF: 110xxxxx 10xxxxxx
+ * 0x00000800 0x0000FFFF: 1110xxxx 10xxxxxx 10xxxxxx
+ * 0x00010000 0x001FFFFF: 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 0x00200000 0x03FFFFFF: 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ * 0x04000000 0x7FFFFFFF: 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
+ *
+ * Actual unicode characters are limited to the range 0x0 - 0x10FFFF,
+ * 17 planes of 65536 values.  This limits the sequences actually seen
+ * even more, to just the following.
+ *
+ *          0 -     0x7F: 0                   - 0x7F
+ *       0x80 -    0x7FF: 0xC2 0x80           - 0xDF 0xBF
+ *      0x800 -   0xFFFF: 0xE0 0xA0 0x80      - 0xEF 0xBF 0xBF
+ *    0x10000 - 0x10FFFF: 0xF0 0x90 0x80 0x80 - 0xF4 0x8F 0xBF 0xBF
+ *
+ * Within those ranges the surrogates 0xD800 - 0xDFFF are not allowed.
+ *
+ * Note that the longest sequence seen with valid usage is 4 bytes,
+ * the same a single UTF-32 character.  This makes the UTF-8
+ * representation of Unicode strictly smaller than UTF-32.
+ *
+ * The shortest sequence requirement was introduced by:
+ *    Corrigendum #1: UTF-8 Shortest Form
+ * It can be found here:
+ *    http://www.unicode.org/versions/corrigendum1.html
+ *
+ */
+
+/*
+ * Return the number of bytes used by the current UTF-8 sequence.
+ * Assumes the input points to the first byte of a valid UTF-8
+ * sequence.
+ */
+static inline int utf8clen(const char *s)
+{
+	unsigned char c = *s;
+
+	return 1 + (c >= 0xC0) + (c >= 0xE0) + (c >= 0xF0);
+}
+
+/*
+ * Decode a 3-byte UTF-8 sequence.
+ */
+static unsigned int
+utf8decode3(const char *str)
+{
+	unsigned int		uc;
+
+	uc = *str++ & 0x0F;
+	uc <<= 6;
+	uc |= *str++ & 0x3F;
+	uc <<= 6;
+	uc |= *str++ & 0x3F;
+
+	return uc;
+}
+
+/*
+ * Encode a 3-byte UTF-8 sequence.
+ */
+static int
+utf8encode3(char *str, unsigned int val)
+{
+	str[2] = (val & 0x3F) | 0x80;
+	val >>= 6;
+	str[1] = (val & 0x3F) | 0x80;
+	val >>= 6;
+	str[0] = val | 0xE0;
+
+	return 3;
+}
+
+/*
+ * utf8trie_t
+ *
+ * A compact binary tree, used to decode UTF-8 characters.
+ *
+ * Internal nodes are one byte for the node itself, and up to three
+ * bytes for an offset into the tree.  The first byte contains the
+ * following information:
+ *  NEXTBYTE  - flag        - advance to next byte if set
+ *  BITNUM    - 3 bit field - the bit number to tested
+ *  OFFLEN    - 2 bit field - number of bytes in the offset
+ * if offlen == 0 (non-branching node)
+ *  RIGHTPATH - 1 bit field - set if the following node is for the
+ *                            right-hand path (tested bit is set)
+ *  TRIENODE  - 1 bit field - set if the following node is an internal
+ *                            node, otherwise it is a leaf node
+ * if offlen != 0 (branching node)
+ *  LEFTNODE  - 1 bit field - set if the left-hand node is internal
+ *  RIGHTNODE - 1 bit field - set if the right-hand node is internal
+ *
+ * Due to the way utf8 works, there cannot be branching nodes with
+ * NEXTBYTE set, and moreover those nodes always have a righthand
+ * descendant.
+ */
+typedef const unsigned char utf8trie_t;
+#define BITNUM		0x07
+#define NEXTBYTE	0x08
+#define OFFLEN		0x30
+#define OFFLEN_SHIFT	4
+#define RIGHTPATH	0x40
+#define TRIENODE	0x80
+#define RIGHTNODE	0x40
+#define LEFTNODE	0x80
+
+/*
+ * utf8leaf_t
+ *
+ * The leaves of the trie are embedded in the trie, and so the same
+ * underlying datatype: unsigned char.
+ *
+ * leaf[0]: The unicode version, stored as a generation number that is
+ *          an index into utf8agetab[].  With this we can filter code
+ *          points based on the unicode version in which they were
+ *          defined.  The CCC of a non-defined code point is 0.
+ * leaf[1]: Canonical Combining Class. During normalization, we need
+ *          to do a stable sort into ascending order of all characters
+ *          with a non-zero CCC that occur between two characters with
+ *          a CCC of 0, or at the begin or end of a string.
+ *          The unicode standard guarantees that all CCC values are
+ *          between 0 and 254 inclusive, which leaves 255 available as
+ *          a special value.
+ *          Code points with CCC 0 are known as stoppers.
+ * leaf[2]: Decomposition. If leaf[1] == 255, then leaf[2] is the
+ *          start of a NUL-terminated string that is the decomposition
+ *          of the character.
+ *          The CCC of a decomposable character is the same as the CCC
+ *          of the first character of its decomposition.
+ *          Some characters decompose as the empty string: these are
+ *          characters with the Default_Ignorable_Code_Point property.
+ *          These do affect normalization, as they all have CCC 0.
+ *
+ * The decompositions in the trie have been fully expanded, with the
+ * exception of Hangul syllables, which are decomposed algorithmically.
+ *
+ * Casefolding, if applicable, is also done using decompositions.
+ *
+ * The trie is constructed in such a way that leaves exist for all
+ * UTF-8 sequences that match the criteria from the "UTF-8 valid
+ * ranges" comment above, and only for those sequences.  Therefore a
+ * lookup in the trie can be used to validate the UTF-8 input.
+ */
+typedef const unsigned char utf8leaf_t;
+
+#define LEAF_GEN(LEAF)	((LEAF)[0])
+#define LEAF_CCC(LEAF)	((LEAF)[1])
+#define LEAF_STR(LEAF)	((const char *)((LEAF) + 2))
+
+#define MINCCC		(0)
+#define MAXCCC		(254)
+#define STOPPER		(0)
+#define	DECOMPOSE	(255)
+
+/* Marker for hangul syllable decomposition. */
+#define HANGUL		((char)(255))
+/* Size of the synthesized leaf used for Hangul syllable decomposition. */
+#define UTF8HANGULLEAF	(12)
+
+/*
+ * Hangul decomposition (algorithm from Section 3.12 of Unicode 6.3.0)
+ *
+ * AC00;<Hangul Syllable, First>;Lo;0;L;;;;;N;;;;;
+ * D7A3;<Hangul Syllable, Last>;Lo;0;L;;;;;N;;;;;
+ *
+ * SBase = 0xAC00
+ * LBase = 0x1100
+ * VBase = 0x1161
+ * TBase = 0x11A7
+ * LCount = 19
+ * VCount = 21
+ * TCount = 28
+ * NCount = 588 (VCount * TCount)
+ * SCount = 11172 (LCount * NCount)
+ *
+ * Decomposition:
+ *   SIndex = s - SBase
+ *
+ * LV (Canonical/Full)
+ *   LIndex = SIndex / NCount
+ *   VIndex = (Sindex % NCount) / TCount
+ *   LPart = LBase + LIndex
+ *   VPart = VBase + VIndex
+ *
+ * LVT (Canonical)
+ *   LVIndex = (SIndex / TCount) * TCount
+ *   TIndex = (Sindex % TCount)
+ *   LVPart = SBase + LVIndex
+ *   TPart = TBase + TIndex
+ *
+ * LVT (Full)
+ *   LIndex = SIndex / NCount
+ *   VIndex = (Sindex % NCount) / TCount
+ *   TIndex = (Sindex % TCount)
+ *   LPart = LBase + LIndex
+ *   VPart = VBase + VIndex
+ *   if (TIndex == 0) {
+ *          d = <LPart, VPart>
+ *   } else {
+ *          TPart = TBase + TIndex
+ *          d = <LPart, TPart, VPart>
+ *   }
+ */
+
+/* Constants */
+#define SB	(0xAC00)
+#define LB	(0x1100)
+#define VB	(0x1161)
+#define TB	(0x11A7)
+#define LC	(19)
+#define VC	(21)
+#define TC	(28)
+#define NC	(VC * TC)
+#define SC	(LC * NC)
+
+/* Algorithmic decomposition of hangul syllable. */
+static utf8leaf_t *
+utf8hangul(const char *str, unsigned char *hangul)
+{
+	unsigned int	si;
+	unsigned int	li;
+	unsigned int	vi;
+	unsigned int	ti;
+	unsigned char	*h;
+
+	/* Calculate the SI, LI, VI, and TI values. */
+	si = utf8decode3(str) - SB;
+	li = si / NC;
+	vi = (si % NC) / TC;
+	ti = si % TC;
+
+	/* Fill in base of leaf. */
+	h = hangul;
+	LEAF_GEN(h) = 2;
+	LEAF_CCC(h) = DECOMPOSE;
+	h += 2;
+
+	/* Add LPart, a 3-byte UTF-8 sequence. */
+	h += utf8encode3((char *)h, li + LB);
+
+	/* Add VPart, a 3-byte UTF-8 sequence. */
+	h += utf8encode3((char *)h, vi + VB);
+
+	/* Add TPart if required, also a 3-byte UTF-8 sequence. */
+	if (ti)
+		h += utf8encode3((char *)h, ti + TB);
+
+	/* Terminate string. */
+	h[0] = '\0';
+
+	return hangul;
+}
+
+/*
+ * Use trie to scan s, touching at most len bytes.
+ * Returns the leaf if one exists, NULL otherwise.
+ *
+ * A non-NULL return guarantees that the UTF-8 sequence starting at s
+ * is well-formed and corresponds to a known unicode code point.  The
+ * shorthand for this will be "is valid UTF-8 unicode".
+ */
+static utf8leaf_t *utf8nlookup(const struct utf8data *data,
+			       unsigned char *hangul, const char *s, size_t len)
+{
+	utf8trie_t	*trie = NULL;
+	int		offlen;
+	int		offset;
+	int		mask;
+	int		node;
+
+	if (!data)
+		return NULL;
+	if (len == 0)
+		return NULL;
+
+	trie = utf8data + data->offset;
+	node = 1;
+	while (node) {
+		offlen = (*trie & OFFLEN) >> OFFLEN_SHIFT;
+		if (*trie & NEXTBYTE) {
+			if (--len == 0)
+				return NULL;
+			s++;
+		}
+		mask = 1 << (*trie & BITNUM);
+		if (*s & mask) {
+			/* Right leg */
+			if (offlen) {
+				/* Right node at offset of trie */
+				node = (*trie & RIGHTNODE);
+				offset = trie[offlen];
+				while (--offlen) {
+					offset <<= 8;
+					offset |= trie[offlen];
+				}
+				trie += offset;
+			} else if (*trie & RIGHTPATH) {
+				/* Right node after this node */
+				node = (*trie & TRIENODE);
+				trie++;
+			} else {
+				/* No right node. */
+				return NULL;
+			}
+		} else {
+			/* Left leg */
+			if (offlen) {
+				/* Left node after this node. */
+				node = (*trie & LEFTNODE);
+				trie += offlen + 1;
+			} else if (*trie & RIGHTPATH) {
+				/* No left node. */
+				return NULL;
+			} else {
+				/* Left node after this node */
+				node = (*trie & TRIENODE);
+				trie++;
+			}
+		}
+	}
+	/*
+	 * Hangul decomposition is done algorithmically. These are the
+	 * codepoints >= 0xAC00 and <= 0xD7A3. Their UTF-8 encoding is
+	 * always 3 bytes long, so s has been advanced twice, and the
+	 * start of the sequence is at s-2.
+	 */
+	if (LEAF_CCC(trie) == DECOMPOSE && LEAF_STR(trie)[0] == HANGUL)
+		trie = utf8hangul(s - 2, hangul);
+	return trie;
+}
+
+/*
+ * Use trie to scan s.
+ * Returns the leaf if one exists, NULL otherwise.
+ *
+ * Forwards to utf8nlookup().
+ */
+static utf8leaf_t *utf8lookup(const struct utf8data *data,
+			      unsigned char *hangul, const char *s)
+{
+	return utf8nlookup(data, hangul, s, (size_t)-1);
+}
+
+/*
+ * Maximum age of any character in s.
+ * Return -1 if s is not valid UTF-8 unicode.
+ * Return 0 if only non-assigned code points are used.
+ */
+int utf8agemax(const struct utf8data *data, const char *s)
+{
+	utf8leaf_t	*leaf;
+	int		age = 0;
+	int		leaf_age;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!data)
+		return -1;
+
+	while (*s) {
+		leaf = utf8lookup(data, hangul, s);
+		if (!leaf)
+			return -1;
+
+		leaf_age = utf8agetab[LEAF_GEN(leaf)];
+		if (leaf_age <= data->maxage && leaf_age > age)
+			age = leaf_age;
+		s += utf8clen(s);
+	}
+	return age;
+}
+EXPORT_SYMBOL(utf8agemax);
+
+/*
+ * Minimum age of any character in s.
+ * Return -1 if s is not valid UTF-8 unicode.
+ * Return 0 if non-assigned code points are used.
+ */
+int utf8agemin(const struct utf8data *data, const char *s)
+{
+	utf8leaf_t	*leaf;
+	int		age;
+	int		leaf_age;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!data)
+		return -1;
+	age = data->maxage;
+	while (*s) {
+		leaf = utf8lookup(data, hangul, s);
+		if (!leaf)
+			return -1;
+		leaf_age = utf8agetab[LEAF_GEN(leaf)];
+		if (leaf_age <= data->maxage && leaf_age < age)
+			age = leaf_age;
+		s += utf8clen(s);
+	}
+	return age;
+}
+EXPORT_SYMBOL(utf8agemin);
+
+/*
+ * Maximum age of any character in s, touch at most len bytes.
+ * Return -1 if s is not valid UTF-8 unicode.
+ */
+int utf8nagemax(const struct utf8data *data, const char *s, size_t len)
+{
+	utf8leaf_t	*leaf;
+	int		age = 0;
+	int		leaf_age;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!data)
+		return -1;
+
+	while (len && *s) {
+		leaf = utf8nlookup(data, hangul, s, len);
+		if (!leaf)
+			return -1;
+		leaf_age = utf8agetab[LEAF_GEN(leaf)];
+		if (leaf_age <= data->maxage && leaf_age > age)
+			age = leaf_age;
+		len -= utf8clen(s);
+		s += utf8clen(s);
+	}
+	return age;
+}
+EXPORT_SYMBOL(utf8nagemax);
+
+/*
+ * Maximum age of any character in s, touch at most len bytes.
+ * Return -1 if s is not valid UTF-8 unicode.
+ */
+int utf8nagemin(const struct utf8data *data, const char *s, size_t len)
+{
+	utf8leaf_t	*leaf;
+	int		leaf_age;
+	int		age;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!data)
+		return -1;
+	age = data->maxage;
+	while (len && *s) {
+		leaf = utf8nlookup(data, hangul, s, len);
+		if (!leaf)
+			return -1;
+		leaf_age = utf8agetab[LEAF_GEN(leaf)];
+		if (leaf_age <= data->maxage && leaf_age < age)
+			age = leaf_age;
+		len -= utf8clen(s);
+		s += utf8clen(s);
+	}
+	return age;
+}
+EXPORT_SYMBOL(utf8nagemin);
+
+/*
+ * Length of the normalization of s.
+ * Return -1 if s is not valid UTF-8 unicode.
+ *
+ * A string of Default_Ignorable_Code_Point has length 0.
+ */
+ssize_t utf8len(const struct utf8data *data, const char *s)
+{
+	utf8leaf_t	*leaf;
+	size_t		ret = 0;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!data)
+		return -1;
+	while (*s) {
+		leaf = utf8lookup(data, hangul, s);
+		if (!leaf)
+			return -1;
+		if (utf8agetab[LEAF_GEN(leaf)] > data->maxage)
+			ret += utf8clen(s);
+		else if (LEAF_CCC(leaf) == DECOMPOSE)
+			ret += strlen(LEAF_STR(leaf));
+		else
+			ret += utf8clen(s);
+		s += utf8clen(s);
+	}
+	return ret;
+}
+EXPORT_SYMBOL(utf8len);
+
+/*
+ * Length of the normalization of s, touch at most len bytes.
+ * Return -1 if s is not valid UTF-8 unicode.
+ */
+ssize_t utf8nlen(const struct utf8data *data, const char *s, size_t len)
+{
+	utf8leaf_t	*leaf;
+	size_t		ret = 0;
+	unsigned char	hangul[UTF8HANGULLEAF];
+
+	if (!data)
+		return -1;
+	while (len && *s) {
+		leaf = utf8nlookup(data, hangul, s, len);
+		if (!leaf)
+			return -1;
+		if (utf8agetab[LEAF_GEN(leaf)] > data->maxage)
+			ret += utf8clen(s);
+		else if (LEAF_CCC(leaf) == DECOMPOSE)
+			ret += strlen(LEAF_STR(leaf));
+		else
+			ret += utf8clen(s);
+		len -= utf8clen(s);
+		s += utf8clen(s);
+	}
+	return ret;
+}
+EXPORT_SYMBOL(utf8nlen);
+
+/*
+ * Set up an utf8cursor for use by utf8byte().
+ *
+ *   u8c    : pointer to cursor.
+ *   data   : const struct utf8data to use for normalization.
+ *   s      : string.
+ *   len    : length of s.
+ *
+ * Returns -1 on error, 0 on success.
+ */
+int utf8ncursor(struct utf8cursor *u8c, const struct utf8data *data,
+		const char *s, size_t len)
+{
+	if (!data)
+		return -1;
+	if (!s)
+		return -1;
+	u8c->data = data;
+	u8c->s = s;
+	u8c->p = NULL;
+	u8c->ss = NULL;
+	u8c->sp = NULL;
+	u8c->len = len;
+	u8c->slen = 0;
+	u8c->ccc = STOPPER;
+	u8c->nccc = STOPPER;
+	/* Check we didn't clobber the maximum length. */
+	if (u8c->len != len)
+		return -1;
+	/* The first byte of s may not be an utf8 continuation. */
+	if (len > 0 && (*s & 0xC0) == 0x80)
+		return -1;
+	return 0;
+}
+EXPORT_SYMBOL(utf8ncursor);
+
+/*
+ * Set up an utf8cursor for use by utf8byte().
+ *
+ *   u8c    : pointer to cursor.
+ *   data   : const struct utf8data to use for normalization.
+ *   s      : NUL-terminated string.
+ *
+ * Returns -1 on error, 0 on success.
+ */
+int utf8cursor(struct utf8cursor *u8c, const struct utf8data *data,
+	       const char *s)
+{
+	return utf8ncursor(u8c, data, s, (unsigned int)-1);
+}
+EXPORT_SYMBOL(utf8cursor);
+
+/*
+ * Get one byte from the normalized form of the string described by u8c.
+ *
+ * Returns the byte cast to an unsigned char on succes, and -1 on failure.
+ *
+ * The cursor keeps track of the location in the string in u8c->s.
+ * When a character is decomposed, the current location is stored in
+ * u8c->p, and u8c->s is set to the start of the decomposition. Note
+ * that bytes from a decomposition do not count against u8c->len.
+ *
+ * Characters are emitted if they match the current CCC in u8c->ccc.
+ * Hitting end-of-string while u8c->ccc == STOPPER means we're done,
+ * and the function returns 0 in that case.
+ *
+ * Sorting by CCC is done by repeatedly scanning the string.  The
+ * values of u8c->s and u8c->p are stored in u8c->ss and u8c->sp at
+ * the start of the scan.  The first pass finds the lowest CCC to be
+ * emitted and stores it in u8c->nccc, the second pass emits the
+ * characters with this CCC and finds the next lowest CCC. This limits
+ * the number of passes to 1 + the number of different CCCs in the
+ * sequence being scanned.
+ *
+ * Therefore:
+ *  u8c->p  != NULL -> a decomposition is being scanned.
+ *  u8c->ss != NULL -> this is a repeating scan.
+ *  u8c->ccc == -1   -> this is the first scan of a repeating scan.
+ */
+int utf8byte(struct utf8cursor *u8c)
+{
+	utf8leaf_t *leaf;
+	int ccc;
+
+	for (;;) {
+		/* Check for the end of a decomposed character. */
+		if (u8c->p && *u8c->s == '\0') {
+			u8c->s = u8c->p;
+			u8c->p = NULL;
+		}
+
+		/* Check for end-of-string. */
+		if (!u8c->p && (u8c->len == 0 || *u8c->s == '\0')) {
+			/* There is no next byte. */
+			if (u8c->ccc == STOPPER)
+				return 0;
+			/* End-of-string during a scan counts as a stopper. */
+			ccc = STOPPER;
+			goto ccc_mismatch;
+		} else if ((*u8c->s & 0xC0) == 0x80) {
+			/* This is a continuation of the current character. */
+			if (!u8c->p)
+				u8c->len--;
+			return (unsigned char)*u8c->s++;
+		}
+
+		/* Look up the data for the current character. */
+		if (u8c->p) {
+			leaf = utf8lookup(u8c->data, u8c->hangul, u8c->s);
+		} else {
+			leaf = utf8nlookup(u8c->data, u8c->hangul,
+					   u8c->s, u8c->len);
+		}
+
+		/* No leaf found implies that the input is a binary blob. */
+		if (!leaf)
+			return -1;
+
+		ccc = LEAF_CCC(leaf);
+		/* Characters that are too new have CCC 0. */
+		if (utf8agetab[LEAF_GEN(leaf)] > u8c->data->maxage) {
+			ccc = STOPPER;
+		} else if (ccc == DECOMPOSE) {
+			u8c->len -= utf8clen(u8c->s);
+			u8c->p = u8c->s + utf8clen(u8c->s);
+			u8c->s = LEAF_STR(leaf);
+			/* Empty decomposition implies CCC 0. */
+			if (*u8c->s == '\0') {
+				if (u8c->ccc == STOPPER)
+					continue;
+				ccc = STOPPER;
+				goto ccc_mismatch;
+			}
+
+			leaf = utf8lookup(u8c->data, u8c->hangul, u8c->s);
+			if (!leaf)
+				return -1;
+			ccc = LEAF_CCC(leaf);
+		}
+
+		/*
+		 * If this is not a stopper, then see if it updates
+		 * the next canonical class to be emitted.
+		 */
+		if (ccc != STOPPER && u8c->ccc < ccc && ccc < u8c->nccc)
+			u8c->nccc = ccc;
+
+		/*
+		 * Return the current byte if this is the current
+		 * combining class.
+		 */
+		if (ccc == u8c->ccc) {
+			if (!u8c->p)
+				u8c->len--;
+			return (unsigned char)*u8c->s++;
+		}
+
+		/* Current combining class mismatch. */
+ccc_mismatch:
+		if (u8c->nccc == STOPPER) {
+			/*
+			 * Scan forward for the first canonical class
+			 * to be emitted.  Save the position from
+			 * which to restart.
+			 */
+			u8c->ccc = MINCCC - 1;
+			u8c->nccc = ccc;
+			u8c->sp = u8c->p;
+			u8c->ss = u8c->s;
+			u8c->slen = u8c->len;
+			if (!u8c->p)
+				u8c->len -= utf8clen(u8c->s);
+			u8c->s += utf8clen(u8c->s);
+		} else if (ccc != STOPPER) {
+			/* Not a stopper, and not the ccc we're emitting. */
+			if (!u8c->p)
+				u8c->len -= utf8clen(u8c->s);
+			u8c->s += utf8clen(u8c->s);
+		} else if (u8c->nccc != MAXCCC + 1) {
+			/* At a stopper, restart for next ccc. */
+			u8c->ccc = u8c->nccc;
+			u8c->nccc = MAXCCC + 1;
+			u8c->s = u8c->ss;
+			u8c->p = u8c->sp;
+			u8c->len = u8c->slen;
+		} else {
+			/* All done, proceed from here. */
+			u8c->ccc = STOPPER;
+			u8c->nccc = STOPPER;
+			u8c->sp = NULL;
+			u8c->ss = NULL;
+			u8c->slen = 0;
+		}
+	}
+}
+EXPORT_SYMBOL(utf8byte);
+
+const struct utf8data *utf8nfdi(unsigned int maxage)
+{
+	int i = ARRAY_SIZE(utf8nfdidata) - 1;
+
+	while (maxage < utf8nfdidata[i].maxage)
+		i--;
+	if (maxage > utf8nfdidata[i].maxage)
+		return NULL;
+	return &utf8nfdidata[i];
+}
+EXPORT_SYMBOL(utf8nfdi);
+
+const struct utf8data *utf8nfdicf(unsigned int maxage)
+{
+	int i = ARRAY_SIZE(utf8nfdicfdata) - 1;
+
+	while (maxage < utf8nfdicfdata[i].maxage)
+		i--;
+	if (maxage > utf8nfdicfdata[i].maxage)
+		return NULL;
+	return &utf8nfdicfdata[i];
+}
+EXPORT_SYMBOL(utf8nfdicf);
diff --git a/fs/unicode/utf8-selftest.c b/fs/unicode/utf8-selftest.c
new file mode 100644
index 000000000000..6c1a36bbf6ad
--- /dev/null
+++ b/fs/unicode/utf8-selftest.c
@@ -0,0 +1,312 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Kernel module for testing utf-8 support.
+ *
+ * Copyright 2017 Collabora Ltd.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/module.h>
+#include <linux/printk.h>
+#include <linux/unicode.h>
+#include <linux/dcache.h>
+
+#include "utf8n.h"
+
+unsigned int failed_tests;
+unsigned int total_tests;
+
+/* Tests will be based on this version. */
+#define latest_maj 12
+#define latest_min 1
+#define latest_rev 0
+
+#define _test(cond, func, line, fmt, ...) do {				\
+		total_tests++;						\
+		if (!cond) {						\
+			failed_tests++;					\
+			pr_err("test %s:%d Failed: %s%s",		\
+			       func, line, #cond, (fmt?":":"."));	\
+			if (fmt)					\
+				pr_err(fmt, ##__VA_ARGS__);		\
+		}							\
+	} while (0)
+#define test_f(cond, fmt, ...) _test(cond, __func__, __LINE__, fmt, ##__VA_ARGS__)
+#define test(cond) _test(cond, __func__, __LINE__, "")
+
+const static struct {
+	/* UTF-8 strings in this vector _must_ be NULL-terminated. */
+	unsigned char str[10];
+	unsigned char dec[10];
+} nfdi_test_data[] = {
+	/* Trivial sequence */
+	{
+		/* "ABba" decomposes to itself */
+		.str = "aBba",
+		.dec = "aBba",
+	},
+	/* Simple equivalent sequences */
+	{
+               /* 'VULGAR FRACTION ONE QUARTER' cannot decompose to
+                  'NUMBER 1' + 'FRACTION SLASH' + 'NUMBER 4' on
+                  canonical decomposition */
+               .str = {0xc2, 0xbc, 0x00},
+	       .dec = {0xc2, 0xbc, 0x00},
+	},
+	{
+		/* 'LATIN SMALL LETTER A WITH DIAERESIS' decomposes to
+		   'LETTER A' + 'COMBINING DIAERESIS' */
+		.str = {0xc3, 0xa4, 0x00},
+		.dec = {0x61, 0xcc, 0x88, 0x00},
+	},
+	{
+		/* 'LATIN SMALL LETTER LJ' can't decompose to
+		   'LETTER L' + 'LETTER J' on canonical decomposition */
+		.str = {0xC7, 0x89, 0x00},
+		.dec = {0xC7, 0x89, 0x00},
+	},
+	{
+		/* GREEK ANO TELEIA decomposes to MIDDLE DOT */
+		.str = {0xCE, 0x87, 0x00},
+		.dec = {0xC2, 0xB7, 0x00}
+	},
+	/* Canonical ordering */
+	{
+		/* A + 'COMBINING ACUTE ACCENT' + 'COMBINING OGONEK' decomposes
+		   to A + 'COMBINING OGONEK' + 'COMBINING ACUTE ACCENT' */
+		.str = {0x41, 0xcc, 0x81, 0xcc, 0xa8, 0x0},
+		.dec = {0x41, 0xcc, 0xa8, 0xcc, 0x81, 0x0},
+	},
+	{
+		/* 'LATIN SMALL LETTER A WITH DIAERESIS' + 'COMBINING OGONEK'
+		   decomposes to
+		   'LETTER A' + 'COMBINING OGONEK' + 'COMBINING DIAERESIS' */
+		.str = {0xc3, 0xa4, 0xCC, 0xA8, 0x00},
+
+		.dec = {0x61, 0xCC, 0xA8, 0xcc, 0x88, 0x00},
+	},
+
+};
+
+const static struct {
+	/* UTF-8 strings in this vector _must_ be NULL-terminated. */
+	unsigned char str[30];
+	unsigned char ncf[30];
+} nfdicf_test_data[] = {
+	/* Trivial sequences */
+	{
+		/* "ABba" folds to lowercase */
+		.str = {0x41, 0x42, 0x62, 0x61, 0x00},
+		.ncf = {0x61, 0x62, 0x62, 0x61, 0x00},
+	},
+	{
+		/* All ASCII folds to lower-case */
+		.str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ0.1",
+		.ncf = "abcdefghijklmnopqrstuvwxyz0.1",
+	},
+	{
+		/* LATIN SMALL LETTER SHARP S folds to
+		   LATIN SMALL LETTER S + LATIN SMALL LETTER S */
+		.str = {0xc3, 0x9f, 0x00},
+		.ncf = {0x73, 0x73, 0x00},
+	},
+	{
+		/* LATIN CAPITAL LETTER A WITH RING ABOVE folds to
+		   LATIN SMALL LETTER A + COMBINING RING ABOVE */
+		.str = {0xC3, 0x85, 0x00},
+		.ncf = {0x61, 0xcc, 0x8a, 0x00},
+	},
+	/* Introduced by UTF-8.0.0. */
+	/* Cherokee letters are interesting test-cases because they fold
+	   to upper-case.  Before 8.0.0, Cherokee lowercase were
+	   undefined, thus, the folding from LC is not stable between
+	   7.0.0 -> 8.0.0, but it is from UC. */
+	{
+		/* CHEROKEE SMALL LETTER A folds to CHEROKEE LETTER A */
+		.str = {0xea, 0xad, 0xb0, 0x00},
+		.ncf = {0xe1, 0x8e, 0xa0, 0x00},
+	},
+	{
+		/* CHEROKEE SMALL LETTER YE folds to CHEROKEE LETTER YE */
+		.str = {0xe1, 0x8f, 0xb8, 0x00},
+		.ncf = {0xe1, 0x8f, 0xb0, 0x00},
+	},
+	{
+		/* OLD HUNGARIAN CAPITAL LETTER AMB folds to
+		   OLD HUNGARIAN SMALL LETTER AMB */
+		.str = {0xf0, 0x90, 0xb2, 0x83, 0x00},
+		.ncf = {0xf0, 0x90, 0xb3, 0x83, 0x00},
+	},
+	/* Introduced by UTF-9.0.0. */
+	{
+		/* OSAGE CAPITAL LETTER CHA folds to
+		   OSAGE SMALL LETTER CHA */
+		.str = {0xf0, 0x90, 0x92, 0xb5, 0x00},
+		.ncf = {0xf0, 0x90, 0x93, 0x9d, 0x00},
+	},
+	{
+		/* LATIN CAPITAL LETTER SMALL CAPITAL I folds to
+		   LATIN LETTER SMALL CAPITAL I */
+		.str = {0xea, 0x9e, 0xae, 0x00},
+		.ncf = {0xc9, 0xaa, 0x00},
+	},
+	/* Introduced by UTF-11.0.0. */
+	{
+		/* GEORGIAN SMALL LETTER AN folds to GEORGIAN MTAVRULI
+		   CAPITAL LETTER AN */
+		.str = {0xe1, 0xb2, 0x90, 0x00},
+		.ncf = {0xe1, 0x83, 0x90, 0x00},
+	}
+};
+
+static void check_utf8_nfdi(void)
+{
+	int i;
+	struct utf8cursor u8c;
+	const struct utf8data *data;
+
+	data = utf8nfdi(UNICODE_AGE(latest_maj, latest_min, latest_rev));
+	if (!data) {
+		pr_err("%s: Unable to load utf8-%d.%d.%d. Skipping.\n",
+		       __func__, latest_maj, latest_min, latest_rev);
+		return;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(nfdi_test_data); i++) {
+		int len = strlen(nfdi_test_data[i].str);
+		int nlen = strlen(nfdi_test_data[i].dec);
+		int j = 0;
+		unsigned char c;
+
+		test((utf8len(data, nfdi_test_data[i].str) == nlen));
+		test((utf8nlen(data, nfdi_test_data[i].str, len) == nlen));
+
+		if (utf8cursor(&u8c, data, nfdi_test_data[i].str) < 0)
+			pr_err("can't create cursor\n");
+
+		while ((c = utf8byte(&u8c)) > 0) {
+			test_f((c == nfdi_test_data[i].dec[j]),
+			       "Unexpected byte 0x%x should be 0x%x\n",
+			       c, nfdi_test_data[i].dec[j]);
+			j++;
+		}
+
+		test((j == nlen));
+	}
+}
+
+static void check_utf8_nfdicf(void)
+{
+	int i;
+	struct utf8cursor u8c;
+	const struct utf8data *data;
+
+	data = utf8nfdicf(UNICODE_AGE(latest_maj, latest_min, latest_rev));
+	if (!data) {
+		pr_err("%s: Unable to load utf8-%d.%d.%d. Skipping.\n",
+		       __func__, latest_maj, latest_min, latest_rev);
+		return;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(nfdicf_test_data); i++) {
+		int len = strlen(nfdicf_test_data[i].str);
+		int nlen = strlen(nfdicf_test_data[i].ncf);
+		int j = 0;
+		unsigned char c;
+
+		test((utf8len(data, nfdicf_test_data[i].str) == nlen));
+		test((utf8nlen(data, nfdicf_test_data[i].str, len) == nlen));
+
+		if (utf8cursor(&u8c, data, nfdicf_test_data[i].str) < 0)
+			pr_err("can't create cursor\n");
+
+		while ((c = utf8byte(&u8c)) > 0) {
+			test_f((c == nfdicf_test_data[i].ncf[j]),
+			       "Unexpected byte 0x%x should be 0x%x\n",
+			       c, nfdicf_test_data[i].ncf[j]);
+			j++;
+		}
+
+		test((j == nlen));
+	}
+}
+
+static void check_utf8_comparisons(void)
+{
+	int i;
+	struct unicode_map *table = utf8_load("12.1.0");
+
+	if (IS_ERR(table)) {
+		pr_err("%s: Unable to load utf8 %d.%d.%d. Skipping.\n",
+		       __func__, latest_maj, latest_min, latest_rev);
+		return;
+	}
+
+	for (i = 0; i < ARRAY_SIZE(nfdi_test_data); i++) {
+		const struct qstr s1 = {.name = nfdi_test_data[i].str,
+					.len = sizeof(nfdi_test_data[i].str)};
+		const struct qstr s2 = {.name = nfdi_test_data[i].dec,
+					.len = sizeof(nfdi_test_data[i].dec)};
+
+		test_f(!utf8_strncmp(table, &s1, &s2),
+		       "%s %s comparison mismatch\n", s1.name, s2.name);
+	}
+
+	for (i = 0; i < ARRAY_SIZE(nfdicf_test_data); i++) {
+		const struct qstr s1 = {.name = nfdicf_test_data[i].str,
+					.len = sizeof(nfdicf_test_data[i].str)};
+		const struct qstr s2 = {.name = nfdicf_test_data[i].ncf,
+					.len = sizeof(nfdicf_test_data[i].ncf)};
+
+		test_f(!utf8_strncasecmp(table, &s1, &s2),
+		       "%s %s comparison mismatch\n", s1.name, s2.name);
+	}
+
+	utf8_unload(table);
+}
+
+static void check_supported_versions(void)
+{
+	/* Unicode 7.0.0 should be supported. */
+	test(utf8version_is_supported(7, 0, 0));
+
+	/* Unicode 9.0.0 should be supported. */
+	test(utf8version_is_supported(9, 0, 0));
+
+	/* Unicode 1x.0.0 (the latest version) should be supported. */
+	test(utf8version_is_supported(latest_maj, latest_min, latest_rev));
+
+	/* Next versions don't exist. */
+	test(!utf8version_is_supported(13, 0, 0));
+	test(!utf8version_is_supported(0, 0, 0));
+	test(!utf8version_is_supported(-1, -1, -1));
+}
+
+static int __init init_test_ucd(void)
+{
+	failed_tests = 0;
+	total_tests = 0;
+
+	check_supported_versions();
+	check_utf8_nfdi();
+	check_utf8_nfdicf();
+	check_utf8_comparisons();
+
+	if (!failed_tests)
+		pr_info("All %u tests passed\n", total_tests);
+	else
+		pr_err("%u out of %u tests failed\n", failed_tests,
+		       total_tests);
+	return 0;
+}
+
+static void __exit exit_test_ucd(void)
+{
+}
+
+module_init(init_test_ucd);
+module_exit(exit_test_ucd);
+
+MODULE_AUTHOR("Gabriel Krisman Bertazi <krisman@collabora.co.uk>");
+MODULE_LICENSE("GPL");
diff --git a/fs/unicode/utf8data.h_shipped b/fs/unicode/utf8data.h_shipped
new file mode 100644
index 000000000000..76e4f0e1b089
--- /dev/null
+++ b/fs/unicode/utf8data.h_shipped
@@ -0,0 +1,4109 @@
+/* This file is generated code, do not edit. */
+#ifndef __INCLUDED_FROM_UTF8NORM_C__
+#error Only nls_utf8-norm.c should include this file.
+#endif
+
+static const unsigned int utf8vers = 0xc0100;
+
+static const unsigned int utf8agetab[] = {
+	0,
+	0x10100,
+	0x20000,
+	0x20100,
+	0x30000,
+	0x30100,
+	0x30200,
+	0x40000,
+	0x40100,
+	0x50000,
+	0x50100,
+	0x50200,
+	0x60000,
+	0x60100,
+	0x60200,
+	0x60300,
+	0x70000,
+	0x80000,
+	0x90000,
+	0xa0000,
+	0xb0000,
+	0xc0000,
+	0xc0100
+};
+
+static const struct utf8data utf8nfdicfdata[] = {
+	{ 0, 0 },
+	{ 0x10100, 0 },
+	{ 0x20000, 0 },
+	{ 0x20100, 0 },
+	{ 0x30000, 0 },
+	{ 0x30100, 0 },
+	{ 0x30200, 1792 },
+	{ 0x40000, 3200 },
+	{ 0x40100, 3200 },
+	{ 0x50000, 3200 },
+	{ 0x50100, 3200 },
+	{ 0x50200, 3200 },
+	{ 0x60000, 3200 },
+	{ 0x60100, 3200 },
+	{ 0x60200, 3200 },
+	{ 0x60300, 3200 },
+	{ 0x70000, 3200 },
+	{ 0x80000, 3200 },
+	{ 0x90000, 3200 },
+	{ 0xa0000, 3200 },
+	{ 0xb0000, 3200 },
+	{ 0xc0000, 3200 },
+	{ 0xc0100, 3200 }
+};
+
+static const struct utf8data utf8nfdidata[] = {
+	{ 0, 896 },
+	{ 0x10100, 896 },
+	{ 0x20000, 896 },
+	{ 0x20100, 896 },
+	{ 0x30000, 896 },
+	{ 0x30100, 896 },
+	{ 0x30200, 2496 },
+	{ 0x40000, 20736 },
+	{ 0x40100, 20736 },
+	{ 0x50000, 20736 },
+	{ 0x50100, 20736 },
+	{ 0x50200, 20736 },
+	{ 0x60000, 20736 },
+	{ 0x60100, 20736 },
+	{ 0x60200, 20736 },
+	{ 0x60300, 20736 },
+	{ 0x70000, 20736 },
+	{ 0x80000, 20736 },
+	{ 0x90000, 20736 },
+	{ 0xa0000, 20736 },
+	{ 0xb0000, 20736 },
+	{ 0xc0000, 20736 },
+	{ 0xc0100, 20736 }
+};
+
+static const unsigned char utf8data[64256] = {
+	/* nfdicf_30100 */
+	0xd7,0x07,0x66,0x84,0x0c,0x01,0x00,0xc6,0xd5,0x16,0xe4,0x99,0x1a,0xe3,0x63,0x15,
+	0xe2,0x4c,0x0e,0xc1,0xe0,0x4e,0x0d,0xcf,0x86,0x65,0x2d,0x0d,0x01,0x00,0xd4,0xb8,
+	0xd3,0x27,0xe2,0x89,0xa3,0xe1,0xce,0x35,0xe0,0x2c,0x22,0xcf,0x86,0xc5,0xe4,0x15,
+	0x6d,0xe3,0x60,0x68,0xe2,0xf6,0x65,0xe1,0x29,0x65,0xe0,0xee,0x64,0xcf,0x86,0xe5,
+	0xb3,0x64,0x64,0x96,0x64,0x0b,0x00,0xd2,0x0e,0xe1,0xb5,0x3c,0xe0,0xba,0xa3,0xcf,
+	0x86,0xcf,0x06,0x01,0x00,0xd1,0x0c,0xe0,0x1e,0xa9,0xcf,0x86,0xcf,0x06,0x02,0xff,
+	0xff,0xd0,0x08,0xcf,0x86,0xcf,0x06,0x01,0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x01,
+	0x00,0xe4,0xe1,0x45,0xe3,0x3b,0x45,0xd2,0x06,0xcf,0x06,0x01,0x00,0xe1,0x87,0xad,
+	0xd0,0x21,0xcf,0x86,0xe5,0x81,0xaa,0xe4,0x00,0xaa,0xe3,0xbf,0xa9,0xe2,0x9e,0xa9,
+	0xe1,0x8d,0xa9,0x10,0x08,0x01,0xff,0xe8,0xb1,0x88,0x00,0x01,0xff,0xe6,0x9b,0xb4,
+	0x00,0xcf,0x86,0xe5,0x63,0xac,0xd4,0x19,0xe3,0xa2,0xab,0xe2,0x81,0xab,0xe1,0x70,
+	0xab,0x10,0x08,0x01,0xff,0xe9,0xb9,0xbf,0x00,0x01,0xff,0xe8,0xab,0x96,0x00,0xe3,
+	0x09,0xac,0xe2,0xe8,0xab,0xe1,0xd7,0xab,0x10,0x08,0x01,0xff,0xe7,0xb8,0xb7,0x00,
+	0x01,0xff,0xe9,0x9b,0xbb,0x00,0x83,0xe2,0x19,0xfa,0xe1,0xf2,0xf6,0xe0,0x6f,0xf5,
+	0xcf,0x86,0xd5,0x31,0xc4,0xe3,0x54,0x4e,0xe2,0xf5,0x4c,0xe1,0xa4,0xcc,0xe0,0x9c,
+	0x4b,0xcf,0x86,0xe5,0x8e,0x49,0xe4,0xaf,0x46,0xe3,0x11,0xbd,0xe2,0x68,0xbc,0xe1,
+	0x43,0xbc,0xe0,0x1c,0xbc,0xcf,0x86,0xe5,0xe9,0xbb,0x94,0x07,0x63,0xd4,0xbb,0x07,
+	0x00,0x07,0x00,0xe4,0xdb,0xf4,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x05,0x00,0xd2,0x0b,
+	0xe1,0xea,0xe1,0xcf,0x86,0xcf,0x06,0x05,0x00,0xd1,0x0e,0xe0,0xd9,0xe2,0xcf,0x86,
+	0xe5,0x9e,0xe2,0xcf,0x06,0x11,0x00,0xd0,0x0b,0xcf,0x86,0xe5,0xd9,0xe2,0xcf,0x06,
+	0x13,0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xe4,0x74,0xf4,0xe3,0x5d,0xf3,
+	0xd2,0xa0,0xe1,0x13,0xe7,0xd0,0x21,0xcf,0x86,0xe5,0x14,0xe4,0xe4,0x90,0xe3,0xe3,
+	0x4e,0xe3,0xe2,0x2d,0xe3,0xe1,0x1b,0xe3,0x10,0x08,0x05,0xff,0xe4,0xb8,0xbd,0x00,
+	0x05,0xff,0xe4,0xb8,0xb8,0x00,0xcf,0x86,0xd5,0x1c,0xe4,0x70,0xe5,0xe3,0x2f,0xe5,
+	0xe2,0x0e,0xe5,0xe1,0xfd,0xe4,0x10,0x08,0x05,0xff,0xe5,0x92,0xa2,0x00,0x05,0xff,
+	0xe5,0x93,0xb6,0x00,0xd4,0x34,0xd3,0x18,0xe2,0xf7,0xe5,0xe1,0xe6,0xe5,0x10,0x09,
+	0x05,0xff,0xf0,0xa1,0x9a,0xa8,0x00,0x05,0xff,0xf0,0xa1,0x9b,0xaa,0x00,0xe2,0x17,
+	0xe6,0x91,0x11,0x10,0x09,0x05,0xff,0xf0,0xa1,0x8d,0xaa,0x00,0x05,0xff,0xe5,0xac,
+	0x88,0x00,0x05,0xff,0xe5,0xac,0xbe,0x00,0xe3,0x5d,0xe6,0xd2,0x14,0xe1,0x2c,0xe6,
+	0x10,0x08,0x05,0xff,0xe5,0xaf,0xb3,0x00,0x05,0xff,0xf0,0xa1,0xac,0x98,0x00,0xe1,
+	0x38,0xe6,0x10,0x08,0x05,0xff,0xe5,0xbc,0xb3,0x00,0x05,0xff,0xe5,0xb0,0xa2,0x00,
+	0xd1,0xd5,0xd0,0x6a,0xcf,0x86,0xe5,0x8d,0xeb,0xd4,0x19,0xe3,0xc6,0xea,0xe2,0xa4,
+	0xea,0xe1,0x93,0xea,0x10,0x08,0x05,0xff,0xe6,0xb4,0xbe,0x00,0x05,0xff,0xe6,0xb5,
+	0xb7,0x00,0xd3,0x18,0xe2,0x10,0xeb,0xe1,0xff,0xea,0x10,0x09,0x05,0xff,0xf0,0xa3,
+	0xbd,0x9e,0x00,0x05,0xff,0xf0,0xa3,0xbe,0x8e,0x00,0xd2,0x13,0xe1,0x28,0xeb,0x10,
+	0x08,0x05,0xff,0xe7,0x81,0xbd,0x00,0x05,0xff,0xe7,0x81,0xb7,0x00,0xd1,0x11,0x10,
+	0x08,0x05,0xff,0xe7,0x85,0x85,0x00,0x05,0xff,0xf0,0xa4,0x89,0xa3,0x00,0x10,0x08,
+	0x05,0xff,0xe7,0x86,0x9c,0x00,0x05,0xff,0xe4,0x8e,0xab,0x00,0xcf,0x86,0xe5,0x2a,
+	0xed,0xd4,0x1a,0xe3,0x62,0xec,0xe2,0x48,0xec,0xe1,0x35,0xec,0x10,0x08,0x05,0xff,
+	0xe7,0x9b,0xb4,0x00,0x05,0xff,0xf0,0xa5,0x83,0xb3,0x00,0xd3,0x16,0xe2,0xaa,0xec,
+	0xe1,0x98,0xec,0x10,0x08,0x05,0xff,0xe7,0xa3,0x8c,0x00,0x05,0xff,0xe4,0x83,0xa3,
+	0x00,0xd2,0x13,0xe1,0xc6,0xec,0x10,0x08,0x05,0xff,0xe4,0x84,0xaf,0x00,0x05,0xff,
+	0xe7,0xa9,0x80,0x00,0xd1,0x12,0x10,0x09,0x05,0xff,0xf0,0xa5,0xa5,0xbc,0x00,0x05,
+	0xff,0xf0,0xa5,0xaa,0xa7,0x00,0x10,0x09,0x05,0xff,0xf0,0xa5,0xaa,0xa7,0x00,0x05,
+	0xff,0xe7,0xaa,0xae,0x00,0xe0,0xdc,0xef,0xcf,0x86,0xd5,0x1d,0xe4,0x51,0xee,0xe3,
+	0x0d,0xee,0xe2,0xeb,0xed,0xe1,0xda,0xed,0x10,0x09,0x05,0xff,0xf0,0xa3,0x8d,0x9f,
+	0x00,0x05,0xff,0xe4,0x8f,0x95,0x00,0xd4,0x19,0xe3,0xf8,0xee,0xe2,0xd4,0xee,0xe1,
+	0xc3,0xee,0x10,0x08,0x05,0xff,0xe8,0x8d,0x93,0x00,0x05,0xff,0xe8,0x8f,0x8a,0x00,
+	0xd3,0x18,0xe2,0x43,0xef,0xe1,0x32,0xef,0x10,0x09,0x05,0xff,0xf0,0xa6,0xbe,0xb1,
+	0x00,0x05,0xff,0xf0,0xa7,0x83,0x92,0x00,0xd2,0x13,0xe1,0x5b,0xef,0x10,0x08,0x05,
+	0xff,0xe8,0x9a,0x88,0x00,0x05,0xff,0xe8,0x9c,0x8e,0x00,0xd1,0x10,0x10,0x08,0x05,
+	0xff,0xe8,0x9c,0xa8,0x00,0x05,0xff,0xe8,0x9d,0xab,0x00,0x10,0x08,0x05,0xff,0xe8,
+	0x9e,0x86,0x00,0x05,0xff,0xe4,0xb5,0x97,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	/* nfdi_30100 */
+	0x57,0x04,0x01,0x00,0xc6,0xd5,0x16,0xe4,0xc2,0x59,0xe3,0xfb,0x54,0xe2,0x74,0x4f,
+	0xc1,0xe0,0xa0,0x4d,0xcf,0x86,0x65,0x84,0x4d,0x01,0x00,0xd4,0xb8,0xd3,0x27,0xe2,
+	0x0c,0xa0,0xe1,0xdf,0x8d,0xe0,0x39,0x71,0xcf,0x86,0xc5,0xe4,0x98,0x69,0xe3,0xe3,
+	0x64,0xe2,0x79,0x62,0xe1,0xac,0x61,0xe0,0x71,0x61,0xcf,0x86,0xe5,0x36,0x61,0x64,
+	0x19,0x61,0x0b,0x00,0xd2,0x0e,0xe1,0xc2,0xa0,0xe0,0x3d,0xa0,0xcf,0x86,0xcf,0x06,
+	0x01,0x00,0xd1,0x0c,0xe0,0xa1,0xa5,0xcf,0x86,0xcf,0x06,0x02,0xff,0xff,0xd0,0x08,
+	0xcf,0x86,0xcf,0x06,0x01,0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x01,0x00,0xe4,0x9e,
+	0xb6,0xe3,0x18,0xae,0xd2,0x06,0xcf,0x06,0x01,0x00,0xe1,0x0a,0xaa,0xd0,0x21,0xcf,
+	0x86,0xe5,0x04,0xa7,0xe4,0x83,0xa6,0xe3,0x42,0xa6,0xe2,0x21,0xa6,0xe1,0x10,0xa6,
+	0x10,0x08,0x01,0xff,0xe8,0xb1,0x88,0x00,0x01,0xff,0xe6,0x9b,0xb4,0x00,0xcf,0x86,
+	0xe5,0xe6,0xa8,0xd4,0x19,0xe3,0x25,0xa8,0xe2,0x04,0xa8,0xe1,0xf3,0xa7,0x10,0x08,
+	0x01,0xff,0xe9,0xb9,0xbf,0x00,0x01,0xff,0xe8,0xab,0x96,0x00,0xe3,0x8c,0xa8,0xe2,
+	0x6b,0xa8,0xe1,0x5a,0xa8,0x10,0x08,0x01,0xff,0xe7,0xb8,0xb7,0x00,0x01,0xff,0xe9,
+	0x9b,0xbb,0x00,0x83,0xe2,0x9c,0xf6,0xe1,0x75,0xf3,0xe0,0xf2,0xf1,0xcf,0x86,0xd5,
+	0x31,0xc4,0xe3,0x6d,0xcc,0xe2,0x46,0xca,0xe1,0x27,0xc9,0xe0,0xb7,0xbf,0xcf,0x86,
+	0xe5,0xaa,0xbb,0xe4,0xa3,0xba,0xe3,0x94,0xb9,0xe2,0xeb,0xb8,0xe1,0xc6,0xb8,0xe0,
+	0x9f,0xb8,0xcf,0x86,0xe5,0x6c,0xb8,0x94,0x07,0x63,0x57,0xb8,0x07,0x00,0x07,0x00,
+	0xe4,0x5e,0xf1,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x05,0x00,0xd2,0x0b,0xe1,0x6d,0xde,
+	0xcf,0x86,0xcf,0x06,0x05,0x00,0xd1,0x0e,0xe0,0x5c,0xdf,0xcf,0x86,0xe5,0x21,0xdf,
+	0xcf,0x06,0x11,0x00,0xd0,0x0b,0xcf,0x86,0xe5,0x5c,0xdf,0xcf,0x06,0x13,0x00,0xcf,
+	0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xe4,0xf7,0xf0,0xe3,0xe0,0xef,0xd2,0xa0,0xe1,
+	0x96,0xe3,0xd0,0x21,0xcf,0x86,0xe5,0x97,0xe0,0xe4,0x13,0xe0,0xe3,0xd1,0xdf,0xe2,
+	0xb0,0xdf,0xe1,0x9e,0xdf,0x10,0x08,0x05,0xff,0xe4,0xb8,0xbd,0x00,0x05,0xff,0xe4,
+	0xb8,0xb8,0x00,0xcf,0x86,0xd5,0x1c,0xe4,0xf3,0xe1,0xe3,0xb2,0xe1,0xe2,0x91,0xe1,
+	0xe1,0x80,0xe1,0x10,0x08,0x05,0xff,0xe5,0x92,0xa2,0x00,0x05,0xff,0xe5,0x93,0xb6,
+	0x00,0xd4,0x34,0xd3,0x18,0xe2,0x7a,0xe2,0xe1,0x69,0xe2,0x10,0x09,0x05,0xff,0xf0,
+	0xa1,0x9a,0xa8,0x00,0x05,0xff,0xf0,0xa1,0x9b,0xaa,0x00,0xe2,0x9a,0xe2,0x91,0x11,
+	0x10,0x09,0x05,0xff,0xf0,0xa1,0x8d,0xaa,0x00,0x05,0xff,0xe5,0xac,0x88,0x00,0x05,
+	0xff,0xe5,0xac,0xbe,0x00,0xe3,0xe0,0xe2,0xd2,0x14,0xe1,0xaf,0xe2,0x10,0x08,0x05,
+	0xff,0xe5,0xaf,0xb3,0x00,0x05,0xff,0xf0,0xa1,0xac,0x98,0x00,0xe1,0xbb,0xe2,0x10,
+	0x08,0x05,0xff,0xe5,0xbc,0xb3,0x00,0x05,0xff,0xe5,0xb0,0xa2,0x00,0xd1,0xd5,0xd0,
+	0x6a,0xcf,0x86,0xe5,0x10,0xe8,0xd4,0x19,0xe3,0x49,0xe7,0xe2,0x27,0xe7,0xe1,0x16,
+	0xe7,0x10,0x08,0x05,0xff,0xe6,0xb4,0xbe,0x00,0x05,0xff,0xe6,0xb5,0xb7,0x00,0xd3,
+	0x18,0xe2,0x93,0xe7,0xe1,0x82,0xe7,0x10,0x09,0x05,0xff,0xf0,0xa3,0xbd,0x9e,0x00,
+	0x05,0xff,0xf0,0xa3,0xbe,0x8e,0x00,0xd2,0x13,0xe1,0xab,0xe7,0x10,0x08,0x05,0xff,
+	0xe7,0x81,0xbd,0x00,0x05,0xff,0xe7,0x81,0xb7,0x00,0xd1,0x11,0x10,0x08,0x05,0xff,
+	0xe7,0x85,0x85,0x00,0x05,0xff,0xf0,0xa4,0x89,0xa3,0x00,0x10,0x08,0x05,0xff,0xe7,
+	0x86,0x9c,0x00,0x05,0xff,0xe4,0x8e,0xab,0x00,0xcf,0x86,0xe5,0xad,0xe9,0xd4,0x1a,
+	0xe3,0xe5,0xe8,0xe2,0xcb,0xe8,0xe1,0xb8,0xe8,0x10,0x08,0x05,0xff,0xe7,0x9b,0xb4,
+	0x00,0x05,0xff,0xf0,0xa5,0x83,0xb3,0x00,0xd3,0x16,0xe2,0x2d,0xe9,0xe1,0x1b,0xe9,
+	0x10,0x08,0x05,0xff,0xe7,0xa3,0x8c,0x00,0x05,0xff,0xe4,0x83,0xa3,0x00,0xd2,0x13,
+	0xe1,0x49,0xe9,0x10,0x08,0x05,0xff,0xe4,0x84,0xaf,0x00,0x05,0xff,0xe7,0xa9,0x80,
+	0x00,0xd1,0x12,0x10,0x09,0x05,0xff,0xf0,0xa5,0xa5,0xbc,0x00,0x05,0xff,0xf0,0xa5,
+	0xaa,0xa7,0x00,0x10,0x09,0x05,0xff,0xf0,0xa5,0xaa,0xa7,0x00,0x05,0xff,0xe7,0xaa,
+	0xae,0x00,0xe0,0x5f,0xec,0xcf,0x86,0xd5,0x1d,0xe4,0xd4,0xea,0xe3,0x90,0xea,0xe2,
+	0x6e,0xea,0xe1,0x5d,0xea,0x10,0x09,0x05,0xff,0xf0,0xa3,0x8d,0x9f,0x00,0x05,0xff,
+	0xe4,0x8f,0x95,0x00,0xd4,0x19,0xe3,0x7b,0xeb,0xe2,0x57,0xeb,0xe1,0x46,0xeb,0x10,
+	0x08,0x05,0xff,0xe8,0x8d,0x93,0x00,0x05,0xff,0xe8,0x8f,0x8a,0x00,0xd3,0x18,0xe2,
+	0xc6,0xeb,0xe1,0xb5,0xeb,0x10,0x09,0x05,0xff,0xf0,0xa6,0xbe,0xb1,0x00,0x05,0xff,
+	0xf0,0xa7,0x83,0x92,0x00,0xd2,0x13,0xe1,0xde,0xeb,0x10,0x08,0x05,0xff,0xe8,0x9a,
+	0x88,0x00,0x05,0xff,0xe8,0x9c,0x8e,0x00,0xd1,0x10,0x10,0x08,0x05,0xff,0xe8,0x9c,
+	0xa8,0x00,0x05,0xff,0xe8,0x9d,0xab,0x00,0x10,0x08,0x05,0xff,0xe8,0x9e,0x86,0x00,
+	0x05,0xff,0xe4,0xb5,0x97,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	/* nfdicf_30200 */
+	0xd7,0x07,0x66,0x84,0x05,0x01,0x00,0xc6,0xd5,0x16,0xe4,0x99,0x13,0xe3,0x63,0x0e,
+	0xe2,0x4c,0x07,0xc1,0xe0,0x4e,0x06,0xcf,0x86,0x65,0x2d,0x06,0x01,0x00,0xd4,0x2a,
+	0xe3,0xd0,0x35,0xe2,0x88,0x9c,0xe1,0xcd,0x2e,0xe0,0x2b,0x1b,0xcf,0x86,0xc5,0xe4,
+	0x14,0x66,0xe3,0x5f,0x61,0xe2,0xf5,0x5e,0xe1,0x28,0x5e,0xe0,0xed,0x5d,0xcf,0x86,
+	0xe5,0xb2,0x5d,0x64,0x95,0x5d,0x0b,0x00,0x83,0xe2,0xa7,0xf3,0xe1,0x80,0xf0,0xe0,
+	0xfd,0xee,0xcf,0x86,0xd5,0x31,0xc4,0xe3,0xe2,0x47,0xe2,0x83,0x46,0xe1,0x32,0xc6,
+	0xe0,0x2a,0x45,0xcf,0x86,0xe5,0x1c,0x43,0xe4,0x3d,0x40,0xe3,0x9f,0xb6,0xe2,0xf6,
+	0xb5,0xe1,0xd1,0xb5,0xe0,0xaa,0xb5,0xcf,0x86,0xe5,0x77,0xb5,0x94,0x07,0x63,0x62,
+	0xb5,0x07,0x00,0x07,0x00,0xe4,0x69,0xee,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x05,0x00,
+	0xd2,0x0b,0xe1,0x78,0xdb,0xcf,0x86,0xcf,0x06,0x05,0x00,0xd1,0x0e,0xe0,0x67,0xdc,
+	0xcf,0x86,0xe5,0x2c,0xdc,0xcf,0x06,0x11,0x00,0xd0,0x0b,0xcf,0x86,0xe5,0x67,0xdc,
+	0xcf,0x06,0x13,0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xe4,0x02,0xee,0xe3,
+	0xeb,0xec,0xd2,0xa0,0xe1,0xa1,0xe0,0xd0,0x21,0xcf,0x86,0xe5,0xa2,0xdd,0xe4,0x1e,
+	0xdd,0xe3,0xdc,0xdc,0xe2,0xbb,0xdc,0xe1,0xa9,0xdc,0x10,0x08,0x05,0xff,0xe4,0xb8,
+	0xbd,0x00,0x05,0xff,0xe4,0xb8,0xb8,0x00,0xcf,0x86,0xd5,0x1c,0xe4,0xfe,0xde,0xe3,
+	0xbd,0xde,0xe2,0x9c,0xde,0xe1,0x8b,0xde,0x10,0x08,0x05,0xff,0xe5,0x92,0xa2,0x00,
+	0x05,0xff,0xe5,0x93,0xb6,0x00,0xd4,0x34,0xd3,0x18,0xe2,0x85,0xdf,0xe1,0x74,0xdf,
+	0x10,0x09,0x05,0xff,0xf0,0xa1,0x9a,0xa8,0x00,0x05,0xff,0xf0,0xa1,0x9b,0xaa,0x00,
+	0xe2,0xa5,0xdf,0x91,0x11,0x10,0x09,0x05,0xff,0xf0,0xa1,0x8d,0xaa,0x00,0x05,0xff,
+	0xe5,0xac,0x88,0x00,0x05,0xff,0xe5,0xac,0xbe,0x00,0xe3,0xeb,0xdf,0xd2,0x14,0xe1,
+	0xba,0xdf,0x10,0x08,0x05,0xff,0xe5,0xaf,0xb3,0x00,0x05,0xff,0xf0,0xa1,0xac,0x98,
+	0x00,0xe1,0xc6,0xdf,0x10,0x08,0x05,0xff,0xe5,0xbc,0xb3,0x00,0x05,0xff,0xe5,0xb0,
+	0xa2,0x00,0xd1,0xd5,0xd0,0x6a,0xcf,0x86,0xe5,0x1b,0xe5,0xd4,0x19,0xe3,0x54,0xe4,
+	0xe2,0x32,0xe4,0xe1,0x21,0xe4,0x10,0x08,0x05,0xff,0xe6,0xb4,0xbe,0x00,0x05,0xff,
+	0xe6,0xb5,0xb7,0x00,0xd3,0x18,0xe2,0x9e,0xe4,0xe1,0x8d,0xe4,0x10,0x09,0x05,0xff,
+	0xf0,0xa3,0xbd,0x9e,0x00,0x05,0xff,0xf0,0xa3,0xbe,0x8e,0x00,0xd2,0x13,0xe1,0xb6,
+	0xe4,0x10,0x08,0x05,0xff,0xe7,0x81,0xbd,0x00,0x05,0xff,0xe7,0x81,0xb7,0x00,0xd1,
+	0x11,0x10,0x08,0x05,0xff,0xe7,0x85,0x85,0x00,0x05,0xff,0xf0,0xa4,0x89,0xa3,0x00,
+	0x10,0x08,0x05,0xff,0xe7,0x86,0x9c,0x00,0x05,0xff,0xe4,0x8e,0xab,0x00,0xcf,0x86,
+	0xe5,0xb8,0xe6,0xd4,0x1a,0xe3,0xf0,0xe5,0xe2,0xd6,0xe5,0xe1,0xc3,0xe5,0x10,0x08,
+	0x05,0xff,0xe7,0x9b,0xb4,0x00,0x05,0xff,0xf0,0xa5,0x83,0xb3,0x00,0xd3,0x16,0xe2,
+	0x38,0xe6,0xe1,0x26,0xe6,0x10,0x08,0x05,0xff,0xe7,0xa3,0x8c,0x00,0x05,0xff,0xe4,
+	0x83,0xa3,0x00,0xd2,0x13,0xe1,0x54,0xe6,0x10,0x08,0x05,0xff,0xe4,0x84,0xaf,0x00,
+	0x05,0xff,0xe7,0xa9,0x80,0x00,0xd1,0x12,0x10,0x09,0x05,0xff,0xf0,0xa5,0xa5,0xbc,
+	0x00,0x05,0xff,0xf0,0xa5,0xaa,0xa7,0x00,0x10,0x09,0x05,0xff,0xf0,0xa5,0xaa,0xa7,
+	0x00,0x05,0xff,0xe7,0xaa,0xae,0x00,0xe0,0x6a,0xe9,0xcf,0x86,0xd5,0x1d,0xe4,0xdf,
+	0xe7,0xe3,0x9b,0xe7,0xe2,0x79,0xe7,0xe1,0x68,0xe7,0x10,0x09,0x05,0xff,0xf0,0xa3,
+	0x8d,0x9f,0x00,0x05,0xff,0xe4,0x8f,0x95,0x00,0xd4,0x19,0xe3,0x86,0xe8,0xe2,0x62,
+	0xe8,0xe1,0x51,0xe8,0x10,0x08,0x05,0xff,0xe8,0x8d,0x93,0x00,0x05,0xff,0xe8,0x8f,
+	0x8a,0x00,0xd3,0x18,0xe2,0xd1,0xe8,0xe1,0xc0,0xe8,0x10,0x09,0x05,0xff,0xf0,0xa6,
+	0xbe,0xb1,0x00,0x05,0xff,0xf0,0xa7,0x83,0x92,0x00,0xd2,0x13,0xe1,0xe9,0xe8,0x10,
+	0x08,0x05,0xff,0xe8,0x9a,0x88,0x00,0x05,0xff,0xe8,0x9c,0x8e,0x00,0xd1,0x10,0x10,
+	0x08,0x05,0xff,0xe8,0x9c,0xa8,0x00,0x05,0xff,0xe8,0x9d,0xab,0x00,0x10,0x08,0x05,
+	0xff,0xe8,0x9e,0x86,0x00,0x05,0xff,0xe4,0xb5,0x97,0x00,0x00,0x00,0x00,0x00,0x00,
+	/* nfdi_30200 */
+	0x57,0x04,0x01,0x00,0xc6,0xd5,0x16,0xe4,0x82,0x53,0xe3,0xbb,0x4e,0xe2,0x34,0x49,
+	0xc1,0xe0,0x60,0x47,0xcf,0x86,0x65,0x44,0x47,0x01,0x00,0xd4,0x2a,0xe3,0x1c,0x9a,
+	0xe2,0xcb,0x99,0xe1,0x9e,0x87,0xe0,0xf8,0x6a,0xcf,0x86,0xc5,0xe4,0x57,0x63,0xe3,
+	0xa2,0x5e,0xe2,0x38,0x5c,0xe1,0x6b,0x5b,0xe0,0x30,0x5b,0xcf,0x86,0xe5,0xf5,0x5a,
+	0x64,0xd8,0x5a,0x0b,0x00,0x83,0xe2,0xea,0xf0,0xe1,0xc3,0xed,0xe0,0x40,0xec,0xcf,
+	0x86,0xd5,0x31,0xc4,0xe3,0xbb,0xc6,0xe2,0x94,0xc4,0xe1,0x75,0xc3,0xe0,0x05,0xba,
+	0xcf,0x86,0xe5,0xf8,0xb5,0xe4,0xf1,0xb4,0xe3,0xe2,0xb3,0xe2,0x39,0xb3,0xe1,0x14,
+	0xb3,0xe0,0xed,0xb2,0xcf,0x86,0xe5,0xba,0xb2,0x94,0x07,0x63,0xa5,0xb2,0x07,0x00,
+	0x07,0x00,0xe4,0xac,0xeb,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x05,0x00,0xd2,0x0b,0xe1,
+	0xbb,0xd8,0xcf,0x86,0xcf,0x06,0x05,0x00,0xd1,0x0e,0xe0,0xaa,0xd9,0xcf,0x86,0xe5,
+	0x6f,0xd9,0xcf,0x06,0x11,0x00,0xd0,0x0b,0xcf,0x86,0xe5,0xaa,0xd9,0xcf,0x06,0x13,
+	0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xe4,0x45,0xeb,0xe3,0x2e,0xea,0xd2,
+	0xa0,0xe1,0xe4,0xdd,0xd0,0x21,0xcf,0x86,0xe5,0xe5,0xda,0xe4,0x61,0xda,0xe3,0x1f,
+	0xda,0xe2,0xfe,0xd9,0xe1,0xec,0xd9,0x10,0x08,0x05,0xff,0xe4,0xb8,0xbd,0x00,0x05,
+	0xff,0xe4,0xb8,0xb8,0x00,0xcf,0x86,0xd5,0x1c,0xe4,0x41,0xdc,0xe3,0x00,0xdc,0xe2,
+	0xdf,0xdb,0xe1,0xce,0xdb,0x10,0x08,0x05,0xff,0xe5,0x92,0xa2,0x00,0x05,0xff,0xe5,
+	0x93,0xb6,0x00,0xd4,0x34,0xd3,0x18,0xe2,0xc8,0xdc,0xe1,0xb7,0xdc,0x10,0x09,0x05,
+	0xff,0xf0,0xa1,0x9a,0xa8,0x00,0x05,0xff,0xf0,0xa1,0x9b,0xaa,0x00,0xe2,0xe8,0xdc,
+	0x91,0x11,0x10,0x09,0x05,0xff,0xf0,0xa1,0x8d,0xaa,0x00,0x05,0xff,0xe5,0xac,0x88,
+	0x00,0x05,0xff,0xe5,0xac,0xbe,0x00,0xe3,0x2e,0xdd,0xd2,0x14,0xe1,0xfd,0xdc,0x10,
+	0x08,0x05,0xff,0xe5,0xaf,0xb3,0x00,0x05,0xff,0xf0,0xa1,0xac,0x98,0x00,0xe1,0x09,
+	0xdd,0x10,0x08,0x05,0xff,0xe5,0xbc,0xb3,0x00,0x05,0xff,0xe5,0xb0,0xa2,0x00,0xd1,
+	0xd5,0xd0,0x6a,0xcf,0x86,0xe5,0x5e,0xe2,0xd4,0x19,0xe3,0x97,0xe1,0xe2,0x75,0xe1,
+	0xe1,0x64,0xe1,0x10,0x08,0x05,0xff,0xe6,0xb4,0xbe,0x00,0x05,0xff,0xe6,0xb5,0xb7,
+	0x00,0xd3,0x18,0xe2,0xe1,0xe1,0xe1,0xd0,0xe1,0x10,0x09,0x05,0xff,0xf0,0xa3,0xbd,
+	0x9e,0x00,0x05,0xff,0xf0,0xa3,0xbe,0x8e,0x00,0xd2,0x13,0xe1,0xf9,0xe1,0x10,0x08,
+	0x05,0xff,0xe7,0x81,0xbd,0x00,0x05,0xff,0xe7,0x81,0xb7,0x00,0xd1,0x11,0x10,0x08,
+	0x05,0xff,0xe7,0x85,0x85,0x00,0x05,0xff,0xf0,0xa4,0x89,0xa3,0x00,0x10,0x08,0x05,
+	0xff,0xe7,0x86,0x9c,0x00,0x05,0xff,0xe4,0x8e,0xab,0x00,0xcf,0x86,0xe5,0xfb,0xe3,
+	0xd4,0x1a,0xe3,0x33,0xe3,0xe2,0x19,0xe3,0xe1,0x06,0xe3,0x10,0x08,0x05,0xff,0xe7,
+	0x9b,0xb4,0x00,0x05,0xff,0xf0,0xa5,0x83,0xb3,0x00,0xd3,0x16,0xe2,0x7b,0xe3,0xe1,
+	0x69,0xe3,0x10,0x08,0x05,0xff,0xe7,0xa3,0x8c,0x00,0x05,0xff,0xe4,0x83,0xa3,0x00,
+	0xd2,0x13,0xe1,0x97,0xe3,0x10,0x08,0x05,0xff,0xe4,0x84,0xaf,0x00,0x05,0xff,0xe7,
+	0xa9,0x80,0x00,0xd1,0x12,0x10,0x09,0x05,0xff,0xf0,0xa5,0xa5,0xbc,0x00,0x05,0xff,
+	0xf0,0xa5,0xaa,0xa7,0x00,0x10,0x09,0x05,0xff,0xf0,0xa5,0xaa,0xa7,0x00,0x05,0xff,
+	0xe7,0xaa,0xae,0x00,0xe0,0xad,0xe6,0xcf,0x86,0xd5,0x1d,0xe4,0x22,0xe5,0xe3,0xde,
+	0xe4,0xe2,0xbc,0xe4,0xe1,0xab,0xe4,0x10,0x09,0x05,0xff,0xf0,0xa3,0x8d,0x9f,0x00,
+	0x05,0xff,0xe4,0x8f,0x95,0x00,0xd4,0x19,0xe3,0xc9,0xe5,0xe2,0xa5,0xe5,0xe1,0x94,
+	0xe5,0x10,0x08,0x05,0xff,0xe8,0x8d,0x93,0x00,0x05,0xff,0xe8,0x8f,0x8a,0x00,0xd3,
+	0x18,0xe2,0x14,0xe6,0xe1,0x03,0xe6,0x10,0x09,0x05,0xff,0xf0,0xa6,0xbe,0xb1,0x00,
+	0x05,0xff,0xf0,0xa7,0x83,0x92,0x00,0xd2,0x13,0xe1,0x2c,0xe6,0x10,0x08,0x05,0xff,
+	0xe8,0x9a,0x88,0x00,0x05,0xff,0xe8,0x9c,0x8e,0x00,0xd1,0x10,0x10,0x08,0x05,0xff,
+	0xe8,0x9c,0xa8,0x00,0x05,0xff,0xe8,0x9d,0xab,0x00,0x10,0x08,0x05,0xff,0xe8,0x9e,
+	0x86,0x00,0x05,0xff,0xe4,0xb5,0x97,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	/* nfdicf_c0100 */
+	0xd7,0xb0,0x56,0x04,0x01,0x00,0x95,0xa8,0xd4,0x5e,0xd3,0x2e,0xd2,0x16,0xd1,0x0a,
+	0x10,0x04,0x01,0x00,0x01,0xff,0x61,0x00,0x10,0x06,0x01,0xff,0x62,0x00,0x01,0xff,
+	0x63,0x00,0xd1,0x0c,0x10,0x06,0x01,0xff,0x64,0x00,0x01,0xff,0x65,0x00,0x10,0x06,
+	0x01,0xff,0x66,0x00,0x01,0xff,0x67,0x00,0xd2,0x18,0xd1,0x0c,0x10,0x06,0x01,0xff,
+	0x68,0x00,0x01,0xff,0x69,0x00,0x10,0x06,0x01,0xff,0x6a,0x00,0x01,0xff,0x6b,0x00,
+	0xd1,0x0c,0x10,0x06,0x01,0xff,0x6c,0x00,0x01,0xff,0x6d,0x00,0x10,0x06,0x01,0xff,
+	0x6e,0x00,0x01,0xff,0x6f,0x00,0xd3,0x30,0xd2,0x18,0xd1,0x0c,0x10,0x06,0x01,0xff,
+	0x70,0x00,0x01,0xff,0x71,0x00,0x10,0x06,0x01,0xff,0x72,0x00,0x01,0xff,0x73,0x00,
+	0xd1,0x0c,0x10,0x06,0x01,0xff,0x74,0x00,0x01,0xff,0x75,0x00,0x10,0x06,0x01,0xff,
+	0x76,0x00,0x01,0xff,0x77,0x00,0x92,0x16,0xd1,0x0c,0x10,0x06,0x01,0xff,0x78,0x00,
+	0x01,0xff,0x79,0x00,0x10,0x06,0x01,0xff,0x7a,0x00,0x01,0x00,0x01,0x00,0x01,0x00,
+	0xc6,0xe5,0xf9,0x14,0xe4,0x6f,0x0d,0xe3,0x39,0x08,0xe2,0x22,0x01,0xc1,0xd0,0x24,
+	0xcf,0x86,0x55,0x04,0x01,0x00,0xd4,0x07,0x63,0xd8,0x43,0x01,0x00,0x93,0x13,0x52,
+	0x04,0x01,0x00,0x91,0x0b,0x10,0x04,0x01,0x00,0x01,0xff,0xce,0xbc,0x00,0x01,0x00,
+	0x01,0x00,0xcf,0x86,0xe5,0xb3,0x44,0xd4,0x7f,0xd3,0x3f,0xd2,0x20,0xd1,0x10,0x10,
+	0x08,0x01,0xff,0x61,0xcc,0x80,0x00,0x01,0xff,0x61,0xcc,0x81,0x00,0x10,0x08,0x01,
+	0xff,0x61,0xcc,0x82,0x00,0x01,0xff,0x61,0xcc,0x83,0x00,0xd1,0x10,0x10,0x08,0x01,
+	0xff,0x61,0xcc,0x88,0x00,0x01,0xff,0x61,0xcc,0x8a,0x00,0x10,0x07,0x01,0xff,0xc3,
+	0xa6,0x00,0x01,0xff,0x63,0xcc,0xa7,0x00,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,
+	0x65,0xcc,0x80,0x00,0x01,0xff,0x65,0xcc,0x81,0x00,0x10,0x08,0x01,0xff,0x65,0xcc,
+	0x82,0x00,0x01,0xff,0x65,0xcc,0x88,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x69,0xcc,
+	0x80,0x00,0x01,0xff,0x69,0xcc,0x81,0x00,0x10,0x08,0x01,0xff,0x69,0xcc,0x82,0x00,
+	0x01,0xff,0x69,0xcc,0x88,0x00,0xd3,0x3b,0xd2,0x1f,0xd1,0x0f,0x10,0x07,0x01,0xff,
+	0xc3,0xb0,0x00,0x01,0xff,0x6e,0xcc,0x83,0x00,0x10,0x08,0x01,0xff,0x6f,0xcc,0x80,
+	0x00,0x01,0xff,0x6f,0xcc,0x81,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x6f,0xcc,0x82,
+	0x00,0x01,0xff,0x6f,0xcc,0x83,0x00,0x10,0x08,0x01,0xff,0x6f,0xcc,0x88,0x00,0x01,
+	0x00,0xd2,0x1f,0xd1,0x0f,0x10,0x07,0x01,0xff,0xc3,0xb8,0x00,0x01,0xff,0x75,0xcc,
+	0x80,0x00,0x10,0x08,0x01,0xff,0x75,0xcc,0x81,0x00,0x01,0xff,0x75,0xcc,0x82,0x00,
+	0xd1,0x10,0x10,0x08,0x01,0xff,0x75,0xcc,0x88,0x00,0x01,0xff,0x79,0xcc,0x81,0x00,
+	0x10,0x07,0x01,0xff,0xc3,0xbe,0x00,0x01,0xff,0x73,0x73,0x00,0xe1,0xd4,0x03,0xe0,
+	0xeb,0x01,0xcf,0x86,0xd5,0xfb,0xd4,0x80,0xd3,0x40,0xd2,0x20,0xd1,0x10,0x10,0x08,
+	0x01,0xff,0x61,0xcc,0x84,0x00,0x01,0xff,0x61,0xcc,0x84,0x00,0x10,0x08,0x01,0xff,
+	0x61,0xcc,0x86,0x00,0x01,0xff,0x61,0xcc,0x86,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,
+	0x61,0xcc,0xa8,0x00,0x01,0xff,0x61,0xcc,0xa8,0x00,0x10,0x08,0x01,0xff,0x63,0xcc,
+	0x81,0x00,0x01,0xff,0x63,0xcc,0x81,0x00,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,
+	0x63,0xcc,0x82,0x00,0x01,0xff,0x63,0xcc,0x82,0x00,0x10,0x08,0x01,0xff,0x63,0xcc,
+	0x87,0x00,0x01,0xff,0x63,0xcc,0x87,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x63,0xcc,
+	0x8c,0x00,0x01,0xff,0x63,0xcc,0x8c,0x00,0x10,0x08,0x01,0xff,0x64,0xcc,0x8c,0x00,
+	0x01,0xff,0x64,0xcc,0x8c,0x00,0xd3,0x3b,0xd2,0x1b,0xd1,0x0b,0x10,0x07,0x01,0xff,
+	0xc4,0x91,0x00,0x01,0x00,0x10,0x08,0x01,0xff,0x65,0xcc,0x84,0x00,0x01,0xff,0x65,
+	0xcc,0x84,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x65,0xcc,0x86,0x00,0x01,0xff,0x65,
+	0xcc,0x86,0x00,0x10,0x08,0x01,0xff,0x65,0xcc,0x87,0x00,0x01,0xff,0x65,0xcc,0x87,
+	0x00,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x65,0xcc,0xa8,0x00,0x01,0xff,0x65,
+	0xcc,0xa8,0x00,0x10,0x08,0x01,0xff,0x65,0xcc,0x8c,0x00,0x01,0xff,0x65,0xcc,0x8c,
+	0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x67,0xcc,0x82,0x00,0x01,0xff,0x67,0xcc,0x82,
+	0x00,0x10,0x08,0x01,0xff,0x67,0xcc,0x86,0x00,0x01,0xff,0x67,0xcc,0x86,0x00,0xd4,
+	0x7b,0xd3,0x3b,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x67,0xcc,0x87,0x00,0x01,
+	0xff,0x67,0xcc,0x87,0x00,0x10,0x08,0x01,0xff,0x67,0xcc,0xa7,0x00,0x01,0xff,0x67,
+	0xcc,0xa7,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x68,0xcc,0x82,0x00,0x01,0xff,0x68,
+	0xcc,0x82,0x00,0x10,0x07,0x01,0xff,0xc4,0xa7,0x00,0x01,0x00,0xd2,0x20,0xd1,0x10,
+	0x10,0x08,0x01,0xff,0x69,0xcc,0x83,0x00,0x01,0xff,0x69,0xcc,0x83,0x00,0x10,0x08,
+	0x01,0xff,0x69,0xcc,0x84,0x00,0x01,0xff,0x69,0xcc,0x84,0x00,0xd1,0x10,0x10,0x08,
+	0x01,0xff,0x69,0xcc,0x86,0x00,0x01,0xff,0x69,0xcc,0x86,0x00,0x10,0x08,0x01,0xff,
+	0x69,0xcc,0xa8,0x00,0x01,0xff,0x69,0xcc,0xa8,0x00,0xd3,0x37,0xd2,0x17,0xd1,0x0c,
+	0x10,0x08,0x01,0xff,0x69,0xcc,0x87,0x00,0x01,0x00,0x10,0x07,0x01,0xff,0xc4,0xb3,
+	0x00,0x01,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x6a,0xcc,0x82,0x00,0x01,0xff,0x6a,
+	0xcc,0x82,0x00,0x10,0x08,0x01,0xff,0x6b,0xcc,0xa7,0x00,0x01,0xff,0x6b,0xcc,0xa7,
+	0x00,0xd2,0x1c,0xd1,0x0c,0x10,0x04,0x01,0x00,0x01,0xff,0x6c,0xcc,0x81,0x00,0x10,
+	0x08,0x01,0xff,0x6c,0xcc,0x81,0x00,0x01,0xff,0x6c,0xcc,0xa7,0x00,0xd1,0x10,0x10,
+	0x08,0x01,0xff,0x6c,0xcc,0xa7,0x00,0x01,0xff,0x6c,0xcc,0x8c,0x00,0x10,0x08,0x01,
+	0xff,0x6c,0xcc,0x8c,0x00,0x01,0xff,0xc5,0x80,0x00,0xcf,0x86,0xd5,0xed,0xd4,0x72,
+	0xd3,0x37,0xd2,0x17,0xd1,0x0b,0x10,0x04,0x01,0x00,0x01,0xff,0xc5,0x82,0x00,0x10,
+	0x04,0x01,0x00,0x01,0xff,0x6e,0xcc,0x81,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x6e,
+	0xcc,0x81,0x00,0x01,0xff,0x6e,0xcc,0xa7,0x00,0x10,0x08,0x01,0xff,0x6e,0xcc,0xa7,
+	0x00,0x01,0xff,0x6e,0xcc,0x8c,0x00,0xd2,0x1b,0xd1,0x10,0x10,0x08,0x01,0xff,0x6e,
+	0xcc,0x8c,0x00,0x01,0xff,0xca,0xbc,0x6e,0x00,0x10,0x07,0x01,0xff,0xc5,0x8b,0x00,
+	0x01,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x6f,0xcc,0x84,0x00,0x01,0xff,0x6f,0xcc,
+	0x84,0x00,0x10,0x08,0x01,0xff,0x6f,0xcc,0x86,0x00,0x01,0xff,0x6f,0xcc,0x86,0x00,
+	0xd3,0x3b,0xd2,0x1b,0xd1,0x10,0x10,0x08,0x01,0xff,0x6f,0xcc,0x8b,0x00,0x01,0xff,
+	0x6f,0xcc,0x8b,0x00,0x10,0x07,0x01,0xff,0xc5,0x93,0x00,0x01,0x00,0xd1,0x10,0x10,
+	0x08,0x01,0xff,0x72,0xcc,0x81,0x00,0x01,0xff,0x72,0xcc,0x81,0x00,0x10,0x08,0x01,
+	0xff,0x72,0xcc,0xa7,0x00,0x01,0xff,0x72,0xcc,0xa7,0x00,0xd2,0x20,0xd1,0x10,0x10,
+	0x08,0x01,0xff,0x72,0xcc,0x8c,0x00,0x01,0xff,0x72,0xcc,0x8c,0x00,0x10,0x08,0x01,
+	0xff,0x73,0xcc,0x81,0x00,0x01,0xff,0x73,0xcc,0x81,0x00,0xd1,0x10,0x10,0x08,0x01,
+	0xff,0x73,0xcc,0x82,0x00,0x01,0xff,0x73,0xcc,0x82,0x00,0x10,0x08,0x01,0xff,0x73,
+	0xcc,0xa7,0x00,0x01,0xff,0x73,0xcc,0xa7,0x00,0xd4,0x7b,0xd3,0x3b,0xd2,0x20,0xd1,
+	0x10,0x10,0x08,0x01,0xff,0x73,0xcc,0x8c,0x00,0x01,0xff,0x73,0xcc,0x8c,0x00,0x10,
+	0x08,0x01,0xff,0x74,0xcc,0xa7,0x00,0x01,0xff,0x74,0xcc,0xa7,0x00,0xd1,0x10,0x10,
+	0x08,0x01,0xff,0x74,0xcc,0x8c,0x00,0x01,0xff,0x74,0xcc,0x8c,0x00,0x10,0x07,0x01,
+	0xff,0xc5,0xa7,0x00,0x01,0x00,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x75,0xcc,
+	0x83,0x00,0x01,0xff,0x75,0xcc,0x83,0x00,0x10,0x08,0x01,0xff,0x75,0xcc,0x84,0x00,
+	0x01,0xff,0x75,0xcc,0x84,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x75,0xcc,0x86,0x00,
+	0x01,0xff,0x75,0xcc,0x86,0x00,0x10,0x08,0x01,0xff,0x75,0xcc,0x8a,0x00,0x01,0xff,
+	0x75,0xcc,0x8a,0x00,0xd3,0x40,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x75,0xcc,
+	0x8b,0x00,0x01,0xff,0x75,0xcc,0x8b,0x00,0x10,0x08,0x01,0xff,0x75,0xcc,0xa8,0x00,
+	0x01,0xff,0x75,0xcc,0xa8,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x77,0xcc,0x82,0x00,
+	0x01,0xff,0x77,0xcc,0x82,0x00,0x10,0x08,0x01,0xff,0x79,0xcc,0x82,0x00,0x01,0xff,
+	0x79,0xcc,0x82,0x00,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x79,0xcc,0x88,0x00,
+	0x01,0xff,0x7a,0xcc,0x81,0x00,0x10,0x08,0x01,0xff,0x7a,0xcc,0x81,0x00,0x01,0xff,
+	0x7a,0xcc,0x87,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x7a,0xcc,0x87,0x00,0x01,0xff,
+	0x7a,0xcc,0x8c,0x00,0x10,0x08,0x01,0xff,0x7a,0xcc,0x8c,0x00,0x01,0xff,0x73,0x00,
+	0xe0,0x65,0x01,0xcf,0x86,0xd5,0xb4,0xd4,0x5a,0xd3,0x2f,0xd2,0x16,0xd1,0x0b,0x10,
+	0x04,0x01,0x00,0x01,0xff,0xc9,0x93,0x00,0x10,0x07,0x01,0xff,0xc6,0x83,0x00,0x01,
+	0x00,0xd1,0x0b,0x10,0x07,0x01,0xff,0xc6,0x85,0x00,0x01,0x00,0x10,0x07,0x01,0xff,
+	0xc9,0x94,0x00,0x01,0xff,0xc6,0x88,0x00,0xd2,0x19,0xd1,0x0b,0x10,0x04,0x01,0x00,
+	0x01,0xff,0xc9,0x96,0x00,0x10,0x07,0x01,0xff,0xc9,0x97,0x00,0x01,0xff,0xc6,0x8c,
+	0x00,0x51,0x04,0x01,0x00,0x10,0x07,0x01,0xff,0xc7,0x9d,0x00,0x01,0xff,0xc9,0x99,
+	0x00,0xd3,0x32,0xd2,0x19,0xd1,0x0e,0x10,0x07,0x01,0xff,0xc9,0x9b,0x00,0x01,0xff,
+	0xc6,0x92,0x00,0x10,0x04,0x01,0x00,0x01,0xff,0xc9,0xa0,0x00,0xd1,0x0b,0x10,0x07,
+	0x01,0xff,0xc9,0xa3,0x00,0x01,0x00,0x10,0x07,0x01,0xff,0xc9,0xa9,0x00,0x01,0xff,
+	0xc9,0xa8,0x00,0xd2,0x0f,0x91,0x0b,0x10,0x07,0x01,0xff,0xc6,0x99,0x00,0x01,0x00,
+	0x01,0x00,0xd1,0x0e,0x10,0x07,0x01,0xff,0xc9,0xaf,0x00,0x01,0xff,0xc9,0xb2,0x00,
+	0x10,0x04,0x01,0x00,0x01,0xff,0xc9,0xb5,0x00,0xd4,0x5d,0xd3,0x34,0xd2,0x1b,0xd1,
+	0x10,0x10,0x08,0x01,0xff,0x6f,0xcc,0x9b,0x00,0x01,0xff,0x6f,0xcc,0x9b,0x00,0x10,
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+	0x12,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xa0,0x00,0x14,0xff,0xf0,0x96,0xb9,0xa1,
+	0x00,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xa2,0x00,0x14,0xff,0xf0,0x96,0xb9,0xa3,
+	0x00,0xd1,0x12,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xa4,0x00,0x14,0xff,0xf0,0x96,
+	0xb9,0xa5,0x00,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xa6,0x00,0x14,0xff,0xf0,0x96,
+	0xb9,0xa7,0x00,0xd2,0x24,0xd1,0x12,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xa8,0x00,
+	0x14,0xff,0xf0,0x96,0xb9,0xa9,0x00,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xaa,0x00,
+	0x14,0xff,0xf0,0x96,0xb9,0xab,0x00,0xd1,0x12,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,
+	0xac,0x00,0x14,0xff,0xf0,0x96,0xb9,0xad,0x00,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,
+	0xae,0x00,0x14,0xff,0xf0,0x96,0xb9,0xaf,0x00,0xd3,0x48,0xd2,0x24,0xd1,0x12,0x10,
+	0x09,0x14,0xff,0xf0,0x96,0xb9,0xb0,0x00,0x14,0xff,0xf0,0x96,0xb9,0xb1,0x00,0x10,
+	0x09,0x14,0xff,0xf0,0x96,0xb9,0xb2,0x00,0x14,0xff,0xf0,0x96,0xb9,0xb3,0x00,0xd1,
+	0x12,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xb4,0x00,0x14,0xff,0xf0,0x96,0xb9,0xb5,
+	0x00,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xb6,0x00,0x14,0xff,0xf0,0x96,0xb9,0xb7,
+	0x00,0xd2,0x24,0xd1,0x12,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xb8,0x00,0x14,0xff,
+	0xf0,0x96,0xb9,0xb9,0x00,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xba,0x00,0x14,0xff,
+	0xf0,0x96,0xb9,0xbb,0x00,0xd1,0x12,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xbc,0x00,
+	0x14,0xff,0xf0,0x96,0xb9,0xbd,0x00,0x10,0x09,0x14,0xff,0xf0,0x96,0xb9,0xbe,0x00,
+	0x14,0xff,0xf0,0x96,0xb9,0xbf,0x00,0x14,0x00,0xd2,0x14,0xe1,0x25,0x82,0xe0,0x1c,
+	0x82,0xcf,0x86,0xe5,0xdd,0x81,0xe4,0x9a,0x81,0xcf,0x06,0x12,0x00,0xd1,0x0b,0xe0,
+	0x51,0x83,0xcf,0x86,0xcf,0x06,0x00,0x00,0xe0,0x95,0x8b,0xcf,0x86,0xd5,0x22,0xe4,
+	0xd0,0x88,0xe3,0x93,0x88,0xe2,0x38,0x88,0xe1,0x31,0x88,0xe0,0x2a,0x88,0xcf,0x86,
+	0xe5,0xfb,0x87,0xe4,0xe2,0x87,0x93,0x07,0x62,0xd1,0x87,0x12,0xe6,0x12,0xe6,0xe4,
+	0x36,0x89,0xe3,0x2f,0x89,0xd2,0x09,0xe1,0xb8,0x88,0xcf,0x06,0x10,0x00,0xe1,0x1f,
+	0x89,0xe0,0xec,0x88,0xcf,0x86,0xe5,0x21,0x01,0xd4,0x90,0xd3,0x48,0xd2,0x24,0xd1,
+	0x12,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xa2,0x00,0x12,0xff,0xf0,0x9e,0xa4,0xa3,
+	0x00,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xa4,0x00,0x12,0xff,0xf0,0x9e,0xa4,0xa5,
+	0x00,0xd1,0x12,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xa6,0x00,0x12,0xff,0xf0,0x9e,
+	0xa4,0xa7,0x00,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xa8,0x00,0x12,0xff,0xf0,0x9e,
+	0xa4,0xa9,0x00,0xd2,0x24,0xd1,0x12,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xaa,0x00,
+	0x12,0xff,0xf0,0x9e,0xa4,0xab,0x00,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xac,0x00,
+	0x12,0xff,0xf0,0x9e,0xa4,0xad,0x00,0xd1,0x12,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,
+	0xae,0x00,0x12,0xff,0xf0,0x9e,0xa4,0xaf,0x00,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,
+	0xb0,0x00,0x12,0xff,0xf0,0x9e,0xa4,0xb1,0x00,0xd3,0x48,0xd2,0x24,0xd1,0x12,0x10,
+	0x09,0x12,0xff,0xf0,0x9e,0xa4,0xb2,0x00,0x12,0xff,0xf0,0x9e,0xa4,0xb3,0x00,0x10,
+	0x09,0x12,0xff,0xf0,0x9e,0xa4,0xb4,0x00,0x12,0xff,0xf0,0x9e,0xa4,0xb5,0x00,0xd1,
+	0x12,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xb6,0x00,0x12,0xff,0xf0,0x9e,0xa4,0xb7,
+	0x00,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xb8,0x00,0x12,0xff,0xf0,0x9e,0xa4,0xb9,
+	0x00,0xd2,0x24,0xd1,0x12,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xba,0x00,0x12,0xff,
+	0xf0,0x9e,0xa4,0xbb,0x00,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xbc,0x00,0x12,0xff,
+	0xf0,0x9e,0xa4,0xbd,0x00,0xd1,0x12,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa4,0xbe,0x00,
+	0x12,0xff,0xf0,0x9e,0xa4,0xbf,0x00,0x10,0x09,0x12,0xff,0xf0,0x9e,0xa5,0x80,0x00,
+	0x12,0xff,0xf0,0x9e,0xa5,0x81,0x00,0x94,0x1e,0x93,0x1a,0x92,0x16,0x91,0x12,0x10,
+	0x09,0x12,0xff,0xf0,0x9e,0xa5,0x82,0x00,0x12,0xff,0xf0,0x9e,0xa5,0x83,0x00,0x12,
+	0x00,0x12,0x00,0x12,0x00,0x12,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,
+	/* nfdi_c0100 */
+	0x57,0x04,0x01,0x00,0xc6,0xe5,0xac,0x13,0xe4,0x41,0x0c,0xe3,0x7a,0x07,0xe2,0xf3,
+	0x01,0xc1,0xd0,0x1f,0xcf,0x86,0x55,0x04,0x01,0x00,0x94,0x15,0x53,0x04,0x01,0x00,
+	0x52,0x04,0x01,0x00,0x91,0x09,0x10,0x04,0x01,0x00,0x01,0xff,0x00,0x01,0x00,0x01,
+	0x00,0xcf,0x86,0xd5,0xe4,0xd4,0x7c,0xd3,0x3c,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,
+	0xff,0x41,0xcc,0x80,0x00,0x01,0xff,0x41,0xcc,0x81,0x00,0x10,0x08,0x01,0xff,0x41,
+	0xcc,0x82,0x00,0x01,0xff,0x41,0xcc,0x83,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x41,
+	0xcc,0x88,0x00,0x01,0xff,0x41,0xcc,0x8a,0x00,0x10,0x04,0x01,0x00,0x01,0xff,0x43,
+	0xcc,0xa7,0x00,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x45,0xcc,0x80,0x00,0x01,
+	0xff,0x45,0xcc,0x81,0x00,0x10,0x08,0x01,0xff,0x45,0xcc,0x82,0x00,0x01,0xff,0x45,
+	0xcc,0x88,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x49,0xcc,0x80,0x00,0x01,0xff,0x49,
+	0xcc,0x81,0x00,0x10,0x08,0x01,0xff,0x49,0xcc,0x82,0x00,0x01,0xff,0x49,0xcc,0x88,
+	0x00,0xd3,0x38,0xd2,0x1c,0xd1,0x0c,0x10,0x04,0x01,0x00,0x01,0xff,0x4e,0xcc,0x83,
+	0x00,0x10,0x08,0x01,0xff,0x4f,0xcc,0x80,0x00,0x01,0xff,0x4f,0xcc,0x81,0x00,0xd1,
+	0x10,0x10,0x08,0x01,0xff,0x4f,0xcc,0x82,0x00,0x01,0xff,0x4f,0xcc,0x83,0x00,0x10,
+	0x08,0x01,0xff,0x4f,0xcc,0x88,0x00,0x01,0x00,0xd2,0x1c,0xd1,0x0c,0x10,0x04,0x01,
+	0x00,0x01,0xff,0x55,0xcc,0x80,0x00,0x10,0x08,0x01,0xff,0x55,0xcc,0x81,0x00,0x01,
+	0xff,0x55,0xcc,0x82,0x00,0x91,0x10,0x10,0x08,0x01,0xff,0x55,0xcc,0x88,0x00,0x01,
+	0xff,0x59,0xcc,0x81,0x00,0x01,0x00,0xd4,0x7c,0xd3,0x3c,0xd2,0x20,0xd1,0x10,0x10,
+	0x08,0x01,0xff,0x61,0xcc,0x80,0x00,0x01,0xff,0x61,0xcc,0x81,0x00,0x10,0x08,0x01,
+	0xff,0x61,0xcc,0x82,0x00,0x01,0xff,0x61,0xcc,0x83,0x00,0xd1,0x10,0x10,0x08,0x01,
+	0xff,0x61,0xcc,0x88,0x00,0x01,0xff,0x61,0xcc,0x8a,0x00,0x10,0x04,0x01,0x00,0x01,
+	0xff,0x63,0xcc,0xa7,0x00,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x65,0xcc,0x80,
+	0x00,0x01,0xff,0x65,0xcc,0x81,0x00,0x10,0x08,0x01,0xff,0x65,0xcc,0x82,0x00,0x01,
+	0xff,0x65,0xcc,0x88,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x69,0xcc,0x80,0x00,0x01,
+	0xff,0x69,0xcc,0x81,0x00,0x10,0x08,0x01,0xff,0x69,0xcc,0x82,0x00,0x01,0xff,0x69,
+	0xcc,0x88,0x00,0xd3,0x38,0xd2,0x1c,0xd1,0x0c,0x10,0x04,0x01,0x00,0x01,0xff,0x6e,
+	0xcc,0x83,0x00,0x10,0x08,0x01,0xff,0x6f,0xcc,0x80,0x00,0x01,0xff,0x6f,0xcc,0x81,
+	0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x6f,0xcc,0x82,0x00,0x01,0xff,0x6f,0xcc,0x83,
+	0x00,0x10,0x08,0x01,0xff,0x6f,0xcc,0x88,0x00,0x01,0x00,0xd2,0x1c,0xd1,0x0c,0x10,
+	0x04,0x01,0x00,0x01,0xff,0x75,0xcc,0x80,0x00,0x10,0x08,0x01,0xff,0x75,0xcc,0x81,
+	0x00,0x01,0xff,0x75,0xcc,0x82,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x75,0xcc,0x88,
+	0x00,0x01,0xff,0x79,0xcc,0x81,0x00,0x10,0x04,0x01,0x00,0x01,0xff,0x79,0xcc,0x88,
+	0x00,0xe1,0x9a,0x03,0xe0,0xd3,0x01,0xcf,0x86,0xd5,0xf4,0xd4,0x80,0xd3,0x40,0xd2,
+	0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x41,0xcc,0x84,0x00,0x01,0xff,0x61,0xcc,0x84,
+	0x00,0x10,0x08,0x01,0xff,0x41,0xcc,0x86,0x00,0x01,0xff,0x61,0xcc,0x86,0x00,0xd1,
+	0x10,0x10,0x08,0x01,0xff,0x41,0xcc,0xa8,0x00,0x01,0xff,0x61,0xcc,0xa8,0x00,0x10,
+	0x08,0x01,0xff,0x43,0xcc,0x81,0x00,0x01,0xff,0x63,0xcc,0x81,0x00,0xd2,0x20,0xd1,
+	0x10,0x10,0x08,0x01,0xff,0x43,0xcc,0x82,0x00,0x01,0xff,0x63,0xcc,0x82,0x00,0x10,
+	0x08,0x01,0xff,0x43,0xcc,0x87,0x00,0x01,0xff,0x63,0xcc,0x87,0x00,0xd1,0x10,0x10,
+	0x08,0x01,0xff,0x43,0xcc,0x8c,0x00,0x01,0xff,0x63,0xcc,0x8c,0x00,0x10,0x08,0x01,
+	0xff,0x44,0xcc,0x8c,0x00,0x01,0xff,0x64,0xcc,0x8c,0x00,0xd3,0x34,0xd2,0x14,0x51,
+	0x04,0x01,0x00,0x10,0x08,0x01,0xff,0x45,0xcc,0x84,0x00,0x01,0xff,0x65,0xcc,0x84,
+	0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x45,0xcc,0x86,0x00,0x01,0xff,0x65,0xcc,0x86,
+	0x00,0x10,0x08,0x01,0xff,0x45,0xcc,0x87,0x00,0x01,0xff,0x65,0xcc,0x87,0x00,0xd2,
+	0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x45,0xcc,0xa8,0x00,0x01,0xff,0x65,0xcc,0xa8,
+	0x00,0x10,0x08,0x01,0xff,0x45,0xcc,0x8c,0x00,0x01,0xff,0x65,0xcc,0x8c,0x00,0xd1,
+	0x10,0x10,0x08,0x01,0xff,0x47,0xcc,0x82,0x00,0x01,0xff,0x67,0xcc,0x82,0x00,0x10,
+	0x08,0x01,0xff,0x47,0xcc,0x86,0x00,0x01,0xff,0x67,0xcc,0x86,0x00,0xd4,0x74,0xd3,
+	0x34,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x47,0xcc,0x87,0x00,0x01,0xff,0x67,
+	0xcc,0x87,0x00,0x10,0x08,0x01,0xff,0x47,0xcc,0xa7,0x00,0x01,0xff,0x67,0xcc,0xa7,
+	0x00,0x91,0x10,0x10,0x08,0x01,0xff,0x48,0xcc,0x82,0x00,0x01,0xff,0x68,0xcc,0x82,
+	0x00,0x01,0x00,0xd2,0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x49,0xcc,0x83,0x00,0x01,
+	0xff,0x69,0xcc,0x83,0x00,0x10,0x08,0x01,0xff,0x49,0xcc,0x84,0x00,0x01,0xff,0x69,
+	0xcc,0x84,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x49,0xcc,0x86,0x00,0x01,0xff,0x69,
+	0xcc,0x86,0x00,0x10,0x08,0x01,0xff,0x49,0xcc,0xa8,0x00,0x01,0xff,0x69,0xcc,0xa8,
+	0x00,0xd3,0x30,0xd2,0x10,0x91,0x0c,0x10,0x08,0x01,0xff,0x49,0xcc,0x87,0x00,0x01,
+	0x00,0x01,0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x4a,0xcc,0x82,0x00,0x01,0xff,0x6a,
+	0xcc,0x82,0x00,0x10,0x08,0x01,0xff,0x4b,0xcc,0xa7,0x00,0x01,0xff,0x6b,0xcc,0xa7,
+	0x00,0xd2,0x1c,0xd1,0x0c,0x10,0x04,0x01,0x00,0x01,0xff,0x4c,0xcc,0x81,0x00,0x10,
+	0x08,0x01,0xff,0x6c,0xcc,0x81,0x00,0x01,0xff,0x4c,0xcc,0xa7,0x00,0xd1,0x10,0x10,
+	0x08,0x01,0xff,0x6c,0xcc,0xa7,0x00,0x01,0xff,0x4c,0xcc,0x8c,0x00,0x10,0x08,0x01,
+	0xff,0x6c,0xcc,0x8c,0x00,0x01,0x00,0xcf,0x86,0xd5,0xd4,0xd4,0x60,0xd3,0x30,0xd2,
+	0x10,0x51,0x04,0x01,0x00,0x10,0x04,0x01,0x00,0x01,0xff,0x4e,0xcc,0x81,0x00,0xd1,
+	0x10,0x10,0x08,0x01,0xff,0x6e,0xcc,0x81,0x00,0x01,0xff,0x4e,0xcc,0xa7,0x00,0x10,
+	0x08,0x01,0xff,0x6e,0xcc,0xa7,0x00,0x01,0xff,0x4e,0xcc,0x8c,0x00,0xd2,0x10,0x91,
+	0x0c,0x10,0x08,0x01,0xff,0x6e,0xcc,0x8c,0x00,0x01,0x00,0x01,0x00,0xd1,0x10,0x10,
+	0x08,0x01,0xff,0x4f,0xcc,0x84,0x00,0x01,0xff,0x6f,0xcc,0x84,0x00,0x10,0x08,0x01,
+	0xff,0x4f,0xcc,0x86,0x00,0x01,0xff,0x6f,0xcc,0x86,0x00,0xd3,0x34,0xd2,0x14,0x91,
+	0x10,0x10,0x08,0x01,0xff,0x4f,0xcc,0x8b,0x00,0x01,0xff,0x6f,0xcc,0x8b,0x00,0x01,
+	0x00,0xd1,0x10,0x10,0x08,0x01,0xff,0x52,0xcc,0x81,0x00,0x01,0xff,0x72,0xcc,0x81,
+	0x00,0x10,0x08,0x01,0xff,0x52,0xcc,0xa7,0x00,0x01,0xff,0x72,0xcc,0xa7,0x00,0xd2,
+	0x20,0xd1,0x10,0x10,0x08,0x01,0xff,0x52,0xcc,0x8c,0x00,0x01,0xff,0x72,0xcc,0x8c,
+	0x00,0x10,0x08,0x01,0xff,0x53,0xcc,0x81,0x00,0x01,0xff,0x73,0xcc,0x81,0x00,0xd1,
+	0x10,0x10,0x08,0x01,0xff,0x53,0xcc,0x82,0x00,0x01,0xff,0x73,0xcc,0x82,0x00,0x10,
+	0x08,0x01,0xff,0x53,0xcc,0xa7,0x00,0x01,0xff,0x73,0xcc,0xa7,0x00,0xd4,0x74,0xd3,
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+	0xcf,0x06,0x00,0x00,0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,0x06,0xcf,0x06,0x00,0x00,
+	0xd0,0x06,0xcf,0x06,0x00,0x00,0xcf,0x86,0x55,0x04,0x00,0x00,0x54,0x04,0x00,0x00,
+	0x53,0x04,0x00,0x00,0x52,0x04,0x00,0x00,0x11,0x04,0x00,0x00,0x02,0x00,0xd4,0x60,
+	0xd3,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd2,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,
+	0xd1,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd0,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,
+	0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xd4,0x06,0xcf,0x06,0x00,0x00,0xd3,0x06,
+	0xcf,0x06,0x00,0x00,0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,0x06,0xcf,0x06,0x00,0x00,
+	0xd0,0x06,0xcf,0x06,0x00,0x00,0xcf,0x86,0x55,0x04,0x00,0x00,0x54,0x04,0x00,0x00,
+	0x53,0x04,0x00,0x00,0x52,0x04,0x00,0x00,0x11,0x04,0x00,0x00,0x02,0x00,0xd3,0x08,
+	0xcf,0x86,0xcf,0x06,0x00,0x00,0xd2,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd1,0x08,
+	0xcf,0x86,0xcf,0x06,0x00,0x00,0xd0,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xcf,0x86,
+	0xd5,0x06,0xcf,0x06,0x00,0x00,0xd4,0x06,0xcf,0x06,0x00,0x00,0xd3,0x06,0xcf,0x06,
+	0x00,0x00,0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,0x06,0xcf,0x06,0x00,0x00,0xd0,0x06,
+	0xcf,0x06,0x00,0x00,0xcf,0x86,0x55,0x04,0x00,0x00,0x54,0x04,0x00,0x00,0x53,0x04,
+	0x00,0x00,0x52,0x04,0x00,0x00,0x11,0x04,0x00,0x00,0x02,0x00,0xe0,0x83,0x01,0xcf,
+	0x86,0xd5,0xc0,0xd4,0x60,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd2,0x08,0xcf,
+	0x86,0xcf,0x06,0x00,0x00,0xd1,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd0,0x08,0xcf,
+	0x86,0xcf,0x06,0x00,0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xd4,0x06,0xcf,
+	0x06,0x00,0x00,0xd3,0x06,0xcf,0x06,0x00,0x00,0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,
+	0x06,0xcf,0x06,0x00,0x00,0xd0,0x06,0xcf,0x06,0x00,0x00,0xcf,0x86,0x55,0x04,0x00,
+	0x00,0x54,0x04,0x00,0x00,0x53,0x04,0x00,0x00,0x52,0x04,0x00,0x00,0x11,0x04,0x00,
+	0x00,0x02,0x00,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd2,0x08,0xcf,0x86,0xcf,
+	0x06,0x00,0x00,0xd1,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd0,0x08,0xcf,0x86,0xcf,
+	0x06,0x00,0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xd4,0x06,0xcf,0x06,0x00,
+	0x00,0xd3,0x06,0xcf,0x06,0x00,0x00,0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,0x06,0xcf,
+	0x06,0x00,0x00,0xd0,0x06,0xcf,0x06,0x00,0x00,0xcf,0x86,0x55,0x04,0x00,0x00,0x54,
+	0x04,0x00,0x00,0x53,0x04,0x00,0x00,0x52,0x04,0x00,0x00,0x11,0x04,0x00,0x00,0x02,
+	0x00,0xd4,0x60,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd2,0x08,0xcf,0x86,0xcf,
+	0x06,0x00,0x00,0xd1,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd0,0x08,0xcf,0x86,0xcf,
+	0x06,0x00,0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xd4,0x06,0xcf,0x06,0x00,
+	0x00,0xd3,0x06,0xcf,0x06,0x00,0x00,0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,0x06,0xcf,
+	0x06,0x00,0x00,0xd0,0x06,0xcf,0x06,0x00,0x00,0xcf,0x86,0x55,0x04,0x00,0x00,0x54,
+	0x04,0x00,0x00,0x53,0x04,0x00,0x00,0x52,0x04,0x00,0x00,0x11,0x04,0x00,0x00,0x02,
+	0x00,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd2,0x08,0xcf,0x86,0xcf,0x06,0x00,
+	0x00,0xd1,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd0,0x08,0xcf,0x86,0xcf,0x06,0x00,
+	0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xd4,0x06,0xcf,0x06,0x00,0x00,0xd3,
+	0x06,0xcf,0x06,0x00,0x00,0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,0x06,0xcf,0x06,0x00,
+	0x00,0xd0,0x06,0xcf,0x06,0x00,0x00,0xcf,0x86,0x55,0x04,0x00,0x00,0x54,0x04,0x00,
+	0x00,0x53,0x04,0x00,0x00,0x52,0x04,0x00,0x00,0x11,0x04,0x00,0x00,0x02,0x00,0xcf,
+	0x86,0xd5,0xc0,0xd4,0x60,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd2,0x08,0xcf,
+	0x86,0xcf,0x06,0x00,0x00,0xd1,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd0,0x08,0xcf,
+	0x86,0xcf,0x06,0x00,0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xd4,0x06,0xcf,
+	0x06,0x00,0x00,0xd3,0x06,0xcf,0x06,0x00,0x00,0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,
+	0x06,0xcf,0x06,0x00,0x00,0xd0,0x06,0xcf,0x06,0x00,0x00,0xcf,0x86,0x55,0x04,0x00,
+	0x00,0x54,0x04,0x00,0x00,0x53,0x04,0x00,0x00,0x52,0x04,0x00,0x00,0x11,0x04,0x00,
+	0x00,0x02,0x00,0xd3,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd2,0x08,0xcf,0x86,0xcf,
+	0x06,0x00,0x00,0xd1,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd0,0x08,0xcf,0x86,0xcf,
+	0x06,0x00,0x00,0xcf,0x86,0xd5,0x06,0xcf,0x06,0x00,0x00,0xd4,0x06,0xcf,0x06,0x00,
+	0x00,0xd3,0x06,0xcf,0x06,0x00,0x00,0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,0x06,0xcf,
+	0x06,0x00,0x00,0xd0,0x06,0xcf,0x06,0x00,0x00,0xcf,0x86,0x55,0x04,0x00,0x00,0x54,
+	0x04,0x00,0x00,0x53,0x04,0x00,0x00,0x52,0x04,0x00,0x00,0x11,0x04,0x00,0x00,0x02,
+	0x00,0xd4,0xd9,0xd3,0x81,0xd2,0x79,0xd1,0x71,0xd0,0x69,0xcf,0x86,0xd5,0x60,0xd4,
+	0x59,0xd3,0x52,0xd2,0x33,0xd1,0x2c,0xd0,0x25,0xcf,0x86,0x95,0x1e,0x94,0x19,0x93,
+	0x14,0x92,0x0f,0x91,0x0a,0x10,0x05,0x00,0xff,0x00,0x05,0xff,0x00,0x00,0xff,0x00,
+	0x00,0xff,0x00,0x00,0xff,0x00,0x00,0xff,0x00,0x05,0xff,0x00,0xcf,0x06,0x05,0xff,
+	0x00,0xcf,0x06,0x00,0xff,0x00,0xd1,0x07,0xcf,0x06,0x07,0xff,0x00,0xd0,0x07,0xcf,
+	0x06,0x07,0xff,0x00,0xcf,0x86,0x55,0x05,0x07,0xff,0x00,0x14,0x05,0x07,0xff,0x00,
+	0x00,0xff,0x00,0xcf,0x06,0x00,0xff,0x00,0xcf,0x06,0x00,0xff,0x00,0xcf,0x06,0x00,
+	0xff,0x00,0xcf,0x86,0xcf,0x06,0x00,0x00,0xcf,0x86,0xcf,0x06,0x00,0x00,0xcf,0x86,
+	0xcf,0x06,0x00,0x00,0xd2,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xd1,0x08,0xcf,0x86,
+	0xcf,0x06,0x00,0x00,0xd0,0x08,0xcf,0x86,0xcf,0x06,0x00,0x00,0xcf,0x86,0xd5,0x06,
+	0xcf,0x06,0x00,0x00,0xd4,0x06,0xcf,0x06,0x00,0x00,0xd3,0x06,0xcf,0x06,0x00,0x00,
+	0xd2,0x06,0xcf,0x06,0x00,0x00,0xd1,0x06,0xcf,0x06,0x00,0x00,0xd0,0x06,0xcf,0x06,
+	0x00,0x00,0xcf,0x86,0x55,0x04,0x00,0x00,0x54,0x04,0x00,0x00,0x53,0x04,0x00,0x00,
+	0x52,0x04,0x00,0x00,0x11,0x04,0x00,0x00,0x02,0x00,0xcf,0x86,0xcf,0x06,0x02,0x00,
+	0x81,0x80,0xcf,0x86,0x85,0x84,0xcf,0x86,0xcf,0x06,0x02,0x00,0x00,0x00,0x00,0x00
+};
diff --git a/fs/unicode/utf8n.h b/fs/unicode/utf8n.h
new file mode 100644
index 000000000000..0acd530c2c79
--- /dev/null
+++ b/fs/unicode/utf8n.h
@@ -0,0 +1,108 @@
+/* SPDX-License-Identifier: GPL-2.0-only */
+/*
+ * Copyright (c) 2014 SGI.
+ * All rights reserved.
+ */
+
+#ifndef UTF8NORM_H
+#define UTF8NORM_H
+
+#include <linux/types.h>
+#include <linux/export.h>
+#include <linux/string.h>
+#include <linux/module.h>
+
+/* Encoding a unicode version number as a single unsigned int. */
+#define UNICODE_MAJ_SHIFT		(16)
+#define UNICODE_MIN_SHIFT		(8)
+
+#define UNICODE_AGE(MAJ, MIN, REV)			\
+	(((unsigned int)(MAJ) << UNICODE_MAJ_SHIFT) |	\
+	 ((unsigned int)(MIN) << UNICODE_MIN_SHIFT) |	\
+	 ((unsigned int)(REV)))
+
+/* Highest unicode version supported by the data tables. */
+extern int utf8version_is_supported(u8 maj, u8 min, u8 rev);
+extern int utf8version_latest(void);
+
+/*
+ * Look for the correct const struct utf8data for a unicode version.
+ * Returns NULL if the version requested is too new.
+ *
+ * Two normalization forms are supported: nfdi and nfdicf.
+ *
+ * nfdi:
+ *  - Apply unicode normalization form NFD.
+ *  - Remove any Default_Ignorable_Code_Point.
+ *
+ * nfdicf:
+ *  - Apply unicode normalization form NFD.
+ *  - Remove any Default_Ignorable_Code_Point.
+ *  - Apply a full casefold (C + F).
+ */
+extern const struct utf8data *utf8nfdi(unsigned int maxage);
+extern const struct utf8data *utf8nfdicf(unsigned int maxage);
+
+/*
+ * Determine the maximum age of any unicode character in the string.
+ * Returns 0 if only unassigned code points are present.
+ * Returns -1 if the input is not valid UTF-8.
+ */
+extern int utf8agemax(const struct utf8data *data, const char *s);
+extern int utf8nagemax(const struct utf8data *data, const char *s, size_t len);
+
+/*
+ * Determine the minimum age of any unicode character in the string.
+ * Returns 0 if any unassigned code points are present.
+ * Returns -1 if the input is not valid UTF-8.
+ */
+extern int utf8agemin(const struct utf8data *data, const char *s);
+extern int utf8nagemin(const struct utf8data *data, const char *s, size_t len);
+
+/*
+ * Determine the length of the normalized from of the string,
+ * excluding any terminating NULL byte.
+ * Returns 0 if only ignorable code points are present.
+ * Returns -1 if the input is not valid UTF-8.
+ */
+extern ssize_t utf8len(const struct utf8data *data, const char *s);
+extern ssize_t utf8nlen(const struct utf8data *data, const char *s, size_t len);
+
+/* Needed in struct utf8cursor below. */
+#define UTF8HANGULLEAF	(12)
+
+/*
+ * Cursor structure used by the normalizer.
+ */
+struct utf8cursor {
+	const struct utf8data	*data;
+	const char	*s;
+	const char	*p;
+	const char	*ss;
+	const char	*sp;
+	unsigned int	len;
+	unsigned int	slen;
+	short int	ccc;
+	short int	nccc;
+	unsigned char	hangul[UTF8HANGULLEAF];
+};
+
+/*
+ * Initialize a utf8cursor to normalize a string.
+ * Returns 0 on success.
+ * Returns -1 on failure.
+ */
+extern int utf8cursor(struct utf8cursor *u8c, const struct utf8data *data,
+		      const char *s);
+extern int utf8ncursor(struct utf8cursor *u8c, const struct utf8data *data,
+		       const char *s, size_t len);
+
+/*
+ * Get the next byte in the normalization.
+ * Returns a value > 0 && < 256 on success.
+ * Returns 0 when the end of the normalization is reached.
+ * Returns -1 if the string being normalized is not valid UTF-8.
+ */
+extern int utf8byte(struct utf8cursor *u8c);
+
+#endif /* UTF8NORM_H */
diff --git a/fs/userfaultfd.c b/fs/userfaultfd.c
index 89800fc7dc9d..ccbdbd62f0d8 100644
--- a/fs/userfaultfd.c
+++ b/fs/userfaultfd.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
  *  fs/userfaultfd.c
  *
@@ -5,9 +6,6 @@
  *  Copyright (C) 2008-2009 Red Hat, Inc.
  *  Copyright (C) 2015  Red Hat, Inc.
  *
- *  This work is licensed under the terms of the GNU GPL, version 2. See
- *  the COPYING file in the top-level directory.
- *
  *  Some part derived from fs/eventfd.c (anon inode setup) and
  *  mm/ksm.c (mm hashing).
  */
@@ -30,6 +28,8 @@
 #include <linux/security.h>
 #include <linux/hugetlb.h>
 
+int sysctl_unprivileged_userfaultfd __read_mostly = 1;
+
 static struct kmem_cache *userfaultfd_ctx_cachep __read_mostly;
 
 enum userfaultfd_state {
@@ -40,6 +40,16 @@ enum userfaultfd_state {
 /*
  * Start with fault_pending_wqh and fault_wqh so they're more likely
  * to be in the same cacheline.
+ *
+ * Locking order:
+ *	fd_wqh.lock
+ *		fault_pending_wqh.lock
+ *			fault_wqh.lock
+ *		event_wqh.lock
+ *
+ * To avoid deadlocks, IRQs must be disabled when taking any of the above locks,
+ * since fd_wqh.lock is taken by aio_poll() while it's holding a lock that's
+ * also taken in IRQ context.
  */
 struct userfaultfd_ctx {
 	/* waitqueue head for the pending (i.e. not read) userfaults */
@@ -458,7 +468,7 @@ vm_fault_t handle_userfault(struct vm_fault *vmf, unsigned long reason)
 	blocking_state = return_to_userland ? TASK_INTERRUPTIBLE :
 			 TASK_KILLABLE;
 
-	spin_lock(&ctx->fault_pending_wqh.lock);
+	spin_lock_irq(&ctx->fault_pending_wqh.lock);
 	/*
 	 * After the __add_wait_queue the uwq is visible to userland
 	 * through poll/read().
@@ -470,7 +480,7 @@ vm_fault_t handle_userfault(struct vm_fault *vmf, unsigned long reason)
 	 * __add_wait_queue.
 	 */
 	set_current_state(blocking_state);
-	spin_unlock(&ctx->fault_pending_wqh.lock);
+	spin_unlock_irq(&ctx->fault_pending_wqh.lock);
 
 	if (!is_vm_hugetlb_page(vmf->vma))
 		must_wait = userfaultfd_must_wait(ctx, vmf->address, vmf->flags,
@@ -552,13 +562,13 @@ vm_fault_t handle_userfault(struct vm_fault *vmf, unsigned long reason)
 	 * kernel stack can be released after the list_del_init.
 	 */
 	if (!list_empty_careful(&uwq.wq.entry)) {
-		spin_lock(&ctx->fault_pending_wqh.lock);
+		spin_lock_irq(&ctx->fault_pending_wqh.lock);
 		/*
 		 * No need of list_del_init(), the uwq on the stack
 		 * will be freed shortly anyway.
 		 */
 		list_del(&uwq.wq.entry);
-		spin_unlock(&ctx->fault_pending_wqh.lock);
+		spin_unlock_irq(&ctx->fault_pending_wqh.lock);
 	}
 
 	/*
@@ -583,7 +593,7 @@ static void userfaultfd_event_wait_completion(struct userfaultfd_ctx *ctx,
 	init_waitqueue_entry(&ewq->wq, current);
 	release_new_ctx = NULL;
 
-	spin_lock(&ctx->event_wqh.lock);
+	spin_lock_irq(&ctx->event_wqh.lock);
 	/*
 	 * After the __add_wait_queue the uwq is visible to userland
 	 * through poll/read().
@@ -613,15 +623,15 @@ static void userfaultfd_event_wait_completion(struct userfaultfd_ctx *ctx,
 			break;
 		}
 
-		spin_unlock(&ctx->event_wqh.lock);
+		spin_unlock_irq(&ctx->event_wqh.lock);
 
 		wake_up_poll(&ctx->fd_wqh, EPOLLIN);
 		schedule();
 
-		spin_lock(&ctx->event_wqh.lock);
+		spin_lock_irq(&ctx->event_wqh.lock);
 	}
 	__set_current_state(TASK_RUNNING);
-	spin_unlock(&ctx->event_wqh.lock);
+	spin_unlock_irq(&ctx->event_wqh.lock);
 
 	if (release_new_ctx) {
 		struct vm_area_struct *vma;
@@ -629,6 +639,8 @@ static void userfaultfd_event_wait_completion(struct userfaultfd_ctx *ctx,
 
 		/* the various vma->vm_userfaultfd_ctx still points to it */
 		down_write(&mm->mmap_sem);
+		/* no task can run (and in turn coredump) yet */
+		VM_WARN_ON(!mmget_still_valid(mm));
 		for (vma = mm->mmap; vma; vma = vma->vm_next)
 			if (vma->vm_userfaultfd_ctx.ctx == release_new_ctx) {
 				vma->vm_userfaultfd_ctx = NULL_VM_UFFD_CTX;
@@ -883,6 +895,8 @@ static int userfaultfd_release(struct inode *inode, struct file *file)
 	 * taking the mmap_sem for writing.
 	 */
 	down_write(&mm->mmap_sem);
+	if (!mmget_still_valid(mm))
+		goto skip_mm;
 	prev = NULL;
 	for (vma = mm->mmap; vma; vma = vma->vm_next) {
 		cond_resched();
@@ -905,6 +919,7 @@ static int userfaultfd_release(struct inode *inode, struct file *file)
 		vma->vm_flags = new_flags;
 		vma->vm_userfaultfd_ctx = NULL_VM_UFFD_CTX;
 	}
+skip_mm:
 	up_write(&mm->mmap_sem);
 	mmput(mm);
 wakeup:
@@ -913,10 +928,10 @@ wakeup:
 	 * the last page faults that may have been already waiting on
 	 * the fault_*wqh.
 	 */
-	spin_lock(&ctx->fault_pending_wqh.lock);
+	spin_lock_irq(&ctx->fault_pending_wqh.lock);
 	__wake_up_locked_key(&ctx->fault_pending_wqh, TASK_NORMAL, &range);
 	__wake_up(&ctx->fault_wqh, TASK_NORMAL, 1, &range);
-	spin_unlock(&ctx->fault_pending_wqh.lock);
+	spin_unlock_irq(&ctx->fault_pending_wqh.lock);
 
 	/* Flush pending events that may still wait on event_wqh */
 	wake_up_all(&ctx->event_wqh);
@@ -1129,7 +1144,7 @@ static ssize_t userfaultfd_ctx_read(struct userfaultfd_ctx *ctx, int no_wait,
 
 	if (!ret && msg->event == UFFD_EVENT_FORK) {
 		ret = resolve_userfault_fork(ctx, fork_nctx, msg);
-		spin_lock(&ctx->event_wqh.lock);
+		spin_lock_irq(&ctx->event_wqh.lock);
 		if (!list_empty(&fork_event)) {
 			/*
 			 * The fork thread didn't abort, so we can
@@ -1175,7 +1190,7 @@ static ssize_t userfaultfd_ctx_read(struct userfaultfd_ctx *ctx, int no_wait,
 			if (ret)
 				userfaultfd_ctx_put(fork_nctx);
 		}
-		spin_unlock(&ctx->event_wqh.lock);
+		spin_unlock_irq(&ctx->event_wqh.lock);
 	}
 
 	return ret;
@@ -1214,14 +1229,14 @@ static ssize_t userfaultfd_read(struct file *file, char __user *buf,
 static void __wake_userfault(struct userfaultfd_ctx *ctx,
 			     struct userfaultfd_wake_range *range)
 {
-	spin_lock(&ctx->fault_pending_wqh.lock);
+	spin_lock_irq(&ctx->fault_pending_wqh.lock);
 	/* wake all in the range and autoremove */
 	if (waitqueue_active(&ctx->fault_pending_wqh))
 		__wake_up_locked_key(&ctx->fault_pending_wqh, TASK_NORMAL,
 				     range);
 	if (waitqueue_active(&ctx->fault_wqh))
 		__wake_up(&ctx->fault_wqh, TASK_NORMAL, 1, range);
-	spin_unlock(&ctx->fault_pending_wqh.lock);
+	spin_unlock_irq(&ctx->fault_pending_wqh.lock);
 }
 
 static __always_inline void wake_userfault(struct userfaultfd_ctx *ctx,
@@ -1333,6 +1348,8 @@ static int userfaultfd_register(struct userfaultfd_ctx *ctx,
 		goto out;
 
 	down_write(&mm->mmap_sem);
+	if (!mmget_still_valid(mm))
+		goto out_unlock;
 	vma = find_vma_prev(mm, start, &prev);
 	if (!vma)
 		goto out_unlock;
@@ -1520,6 +1537,8 @@ static int userfaultfd_unregister(struct userfaultfd_ctx *ctx,
 		goto out;
 
 	down_write(&mm->mmap_sem);
+	if (!mmget_still_valid(mm))
+		goto out_unlock;
 	vma = find_vma_prev(mm, start, &prev);
 	if (!vma)
 		goto out_unlock;
@@ -1872,7 +1891,7 @@ static void userfaultfd_show_fdinfo(struct seq_file *m, struct file *f)
 	wait_queue_entry_t *wq;
 	unsigned long pending = 0, total = 0;
 
-	spin_lock(&ctx->fault_pending_wqh.lock);
+	spin_lock_irq(&ctx->fault_pending_wqh.lock);
 	list_for_each_entry(wq, &ctx->fault_pending_wqh.head, entry) {
 		pending++;
 		total++;
@@ -1880,7 +1899,7 @@ static void userfaultfd_show_fdinfo(struct seq_file *m, struct file *f)
 	list_for_each_entry(wq, &ctx->fault_wqh.head, entry) {
 		total++;
 	}
-	spin_unlock(&ctx->fault_pending_wqh.lock);
+	spin_unlock_irq(&ctx->fault_pending_wqh.lock);
 
 	/*
 	 * If more protocols will be added, there will be all shown
@@ -1921,6 +1940,9 @@ SYSCALL_DEFINE1(userfaultfd, int, flags)
 	struct userfaultfd_ctx *ctx;
 	int fd;
 
+	if (!sysctl_unprivileged_userfaultfd && !capable(CAP_SYS_PTRACE))
+		return -EPERM;
+
 	BUG_ON(!current->mm);
 
 	/* Check the UFFD_* constants for consistency.  */
diff --git a/fs/utimes.c b/fs/utimes.c
index bdcf2daf39c1..350c9c16ace1 100644
--- a/fs/utimes.c
+++ b/fs/utimes.c
@@ -224,8 +224,8 @@ SYSCALL_DEFINE2(utime, char __user *, filename, struct utimbuf __user *, times)
  * of sys_utimes.
  */
 #ifdef __ARCH_WANT_SYS_UTIME32
-COMPAT_SYSCALL_DEFINE2(utime, const char __user *, filename,
-		       struct old_utimbuf32 __user *, t)
+SYSCALL_DEFINE2(utime32, const char __user *, filename,
+		struct old_utimbuf32 __user *, t)
 {
 	struct timespec64 tv[2];
 
@@ -240,7 +240,7 @@ COMPAT_SYSCALL_DEFINE2(utime, const char __user *, filename,
 }
 #endif
 
-COMPAT_SYSCALL_DEFINE4(utimensat, unsigned int, dfd, const char __user *, filename, struct old_timespec32 __user *, t, int, flags)
+SYSCALL_DEFINE4(utimensat_time32, unsigned int, dfd, const char __user *, filename, struct old_timespec32 __user *, t, int, flags)
 {
 	struct timespec64 tv[2];
 
@@ -276,14 +276,14 @@ static long do_compat_futimesat(unsigned int dfd, const char __user *filename,
 	return do_utimes(dfd, filename, t ? tv : NULL, 0);
 }
 
-COMPAT_SYSCALL_DEFINE3(futimesat, unsigned int, dfd,
+SYSCALL_DEFINE3(futimesat_time32, unsigned int, dfd,
 		       const char __user *, filename,
 		       struct old_timeval32 __user *, t)
 {
 	return do_compat_futimesat(dfd, filename, t);
 }
 
-COMPAT_SYSCALL_DEFINE2(utimes, const char __user *, filename, struct old_timeval32 __user *, t)
+SYSCALL_DEFINE2(utimes_time32, const char __user *, filename, struct old_timeval32 __user *, t)
 {
 	return do_compat_futimesat(AT_FDCWD, filename, t);
 }
diff --git a/fs/xattr.c b/fs/xattr.c
index 0d6a6a4af861..90dd78f0eb27 100644
--- a/fs/xattr.c
+++ b/fs/xattr.c
@@ -1,3 +1,4 @@
+// SPDX-License-Identifier: GPL-2.0-only
 /*
   File: fs/xattr.c
 
diff --git a/fs/xfs/Kconfig b/fs/xfs/Kconfig
index 457ac9f97377..e685299eb3d2 100644
--- a/fs/xfs/Kconfig
+++ b/fs/xfs/Kconfig
@@ -1,7 +1,7 @@
+# SPDX-License-Identifier: GPL-2.0-only
 config XFS_FS
 	tristate "XFS filesystem support"
 	depends on BLOCK
-	depends on (64BIT || LBDAF)
 	select EXPORTFS
 	select LIBCRC32C
 	select FS_IOMAP
diff --git a/fs/xfs/Makefile b/fs/xfs/Makefile
index 7f96bdadc372..b74a47169297 100644
--- a/fs/xfs/Makefile
+++ b/fs/xfs/Makefile
@@ -4,8 +4,8 @@
 # All Rights Reserved.
 #
 
-ccflags-y += -I$(src)			# needed for trace events
-ccflags-y += -I$(src)/libxfs
+ccflags-y += -I $(srctree)/$(src)		# needed for trace events
+ccflags-y += -I $(srctree)/$(src)/libxfs
 
 ccflags-$(CONFIG_XFS_DEBUG) += -g
 
@@ -62,6 +62,7 @@ xfs-y				+= xfs_aops.o \
 				   xfs_attr_inactive.o \
 				   xfs_attr_list.o \
 				   xfs_bmap_util.o \
+				   xfs_bio_io.o \
 				   xfs_buf.o \
 				   xfs_dir2_readdir.o \
 				   xfs_discard.o \
@@ -73,15 +74,18 @@ xfs-y				+= xfs_aops.o \
 				   xfs_fsmap.o \
 				   xfs_fsops.o \
 				   xfs_globals.o \
+				   xfs_health.o \
 				   xfs_icache.o \
 				   xfs_ioctl.o \
 				   xfs_iomap.o \
 				   xfs_iops.o \
 				   xfs_inode.o \
 				   xfs_itable.o \
+				   xfs_iwalk.o \
 				   xfs_message.o \
 				   xfs_mount.o \
 				   xfs_mru_cache.o \
+				   xfs_pwork.o \
 				   xfs_reflink.o \
 				   xfs_stats.o \
 				   xfs_super.o \
@@ -103,12 +107,8 @@ xfs-y				+= xfs_log.o \
 				   xfs_rmap_item.o \
 				   xfs_log_recover.o \
 				   xfs_trans_ail.o \
-				   xfs_trans_bmap.o \
 				   xfs_trans_buf.o \
-				   xfs_trans_extfree.o \
-				   xfs_trans_inode.o \
-				   xfs_trans_refcount.o \
-				   xfs_trans_rmap.o \
+				   xfs_trans_inode.o
 
 # optional features
 xfs-$(CONFIG_XFS_QUOTA)		+= xfs_dquot.o \
@@ -142,6 +142,8 @@ xfs-y				+= $(addprefix scrub/, \
 				   common.o \
 				   dabtree.o \
 				   dir.o \
+				   fscounters.o \
+				   health.o \
 				   ialloc.o \
 				   inode.o \
 				   parent.o \
diff --git a/fs/xfs/kmem.c b/fs/xfs/kmem.c
index fdd9d6ede25c..16bb9a328678 100644
--- a/fs/xfs/kmem.c
+++ b/fs/xfs/kmem.c
@@ -3,12 +3,7 @@
  * Copyright (c) 2000-2005 Silicon Graphics, Inc.
  * All Rights Reserved.
  */
-#include <linux/mm.h>
 #include <linux/sched/mm.h>
-#include <linux/highmem.h>
-#include <linux/slab.h>
-#include <linux/swap.h>
-#include <linux/blkdev.h>
 #include <linux/backing-dev.h>
 #include "kmem.h"
 #include "xfs_message.h"
diff --git a/fs/xfs/kmem.h b/fs/xfs/kmem.h
index 8e6b3ba81c03..267655acd426 100644
--- a/fs/xfs/kmem.h
+++ b/fs/xfs/kmem.h
@@ -124,4 +124,12 @@ kmem_zone_zalloc(kmem_zone_t *zone, xfs_km_flags_t flags)
 	return kmem_zone_alloc(zone, flags | KM_ZERO);
 }
 
+static inline struct page *
+kmem_to_page(void *addr)
+{
+	if (is_vmalloc_addr(addr))
+		return vmalloc_to_page(addr);
+	return virt_to_page(addr);
+}
+
 #endif /* __XFS_SUPPORT_KMEM_H__ */
diff --git a/fs/xfs/libxfs/xfs_ag.c b/fs/xfs/libxfs/xfs_ag.c
index 999ad8d00d43..5de296b34ab1 100644
--- a/fs/xfs/libxfs/xfs_ag.c
+++ b/fs/xfs/libxfs/xfs_ag.c
@@ -10,6 +10,7 @@
 #include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
+#include "xfs_bit.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_btree.h"
@@ -19,6 +20,8 @@
 #include "xfs_ialloc.h"
 #include "xfs_rmap.h"
 #include "xfs_ag.h"
+#include "xfs_ag_resv.h"
+#include "xfs_health.h"
 
 static struct xfs_buf *
 xfs_get_aghdr_buf(
@@ -42,6 +45,12 @@ xfs_get_aghdr_buf(
 	return bp;
 }
 
+static inline bool is_log_ag(struct xfs_mount *mp, struct aghdr_init_data *id)
+{
+	return mp->m_sb.sb_logstart > 0 &&
+	       id->agno == XFS_FSB_TO_AGNO(mp, mp->m_sb.sb_logstart);
+}
+
 /*
  * Generic btree root block init function
  */
@@ -51,40 +60,85 @@ xfs_btroot_init(
 	struct xfs_buf		*bp,
 	struct aghdr_init_data	*id)
 {
-	xfs_btree_init_block(mp, bp, id->type, 0, 0, id->agno, 0);
+	xfs_btree_init_block(mp, bp, id->type, 0, 0, id->agno);
 }
 
-/*
- * Alloc btree root block init functions
- */
+/* Finish initializing a free space btree. */
 static void
-xfs_bnoroot_init(
+xfs_freesp_init_recs(
 	struct xfs_mount	*mp,
 	struct xfs_buf		*bp,
 	struct aghdr_init_data	*id)
 {
 	struct xfs_alloc_rec	*arec;
+	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 
-	xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, id->agno, 0);
 	arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
 	arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks);
+
+	if (is_log_ag(mp, id)) {
+		struct xfs_alloc_rec	*nrec;
+		xfs_agblock_t		start = XFS_FSB_TO_AGBNO(mp,
+							mp->m_sb.sb_logstart);
+
+		ASSERT(start >= mp->m_ag_prealloc_blocks);
+		if (start != mp->m_ag_prealloc_blocks) {
+			/*
+			 * Modify first record to pad stripe align of log
+			 */
+			arec->ar_blockcount = cpu_to_be32(start -
+						mp->m_ag_prealloc_blocks);
+			nrec = arec + 1;
+
+			/*
+			 * Insert second record at start of internal log
+			 * which then gets trimmed.
+			 */
+			nrec->ar_startblock = cpu_to_be32(
+					be32_to_cpu(arec->ar_startblock) +
+					be32_to_cpu(arec->ar_blockcount));
+			arec = nrec;
+			be16_add_cpu(&block->bb_numrecs, 1);
+		}
+		/*
+		 * Change record start to after the internal log
+		 */
+		be32_add_cpu(&arec->ar_startblock, mp->m_sb.sb_logblocks);
+	}
+
+	/*
+	 * Calculate the record block count and check for the case where
+	 * the log might have consumed all available space in the AG. If
+	 * so, reset the record count to 0 to avoid exposure of an invalid
+	 * record start block.
+	 */
 	arec->ar_blockcount = cpu_to_be32(id->agsize -
 					  be32_to_cpu(arec->ar_startblock));
+	if (!arec->ar_blockcount)
+		block->bb_numrecs = 0;
 }
 
+/*
+ * Alloc btree root block init functions
+ */
 static void
-xfs_cntroot_init(
+xfs_bnoroot_init(
 	struct xfs_mount	*mp,
 	struct xfs_buf		*bp,
 	struct aghdr_init_data	*id)
 {
-	struct xfs_alloc_rec	*arec;
+	xfs_btree_init_block(mp, bp, XFS_BTNUM_BNO, 0, 1, id->agno);
+	xfs_freesp_init_recs(mp, bp, id);
+}
 
-	xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, id->agno, 0);
-	arec = XFS_ALLOC_REC_ADDR(mp, XFS_BUF_TO_BLOCK(bp), 1);
-	arec->ar_startblock = cpu_to_be32(mp->m_ag_prealloc_blocks);
-	arec->ar_blockcount = cpu_to_be32(id->agsize -
-					  be32_to_cpu(arec->ar_startblock));
+static void
+xfs_cntroot_init(
+	struct xfs_mount	*mp,
+	struct xfs_buf		*bp,
+	struct aghdr_init_data	*id)
+{
+	xfs_btree_init_block(mp, bp, XFS_BTNUM_CNT, 0, 1, id->agno);
+	xfs_freesp_init_recs(mp, bp, id);
 }
 
 /*
@@ -99,7 +153,7 @@ xfs_rmaproot_init(
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	struct xfs_rmap_rec	*rrec;
 
-	xfs_btree_init_block(mp, bp, XFS_BTNUM_RMAP, 0, 4, id->agno, 0);
+	xfs_btree_init_block(mp, bp, XFS_BTNUM_RMAP, 0, 4, id->agno);
 
 	/*
 	 * mark the AG header regions as static metadata The BNO
@@ -147,6 +201,18 @@ xfs_rmaproot_init(
 		rrec->rm_offset = 0;
 		be16_add_cpu(&block->bb_numrecs, 1);
 	}
+
+	/* account for the log space */
+	if (is_log_ag(mp, id)) {
+		rrec = XFS_RMAP_REC_ADDR(block,
+				be16_to_cpu(block->bb_numrecs) + 1);
+		rrec->rm_startblock = cpu_to_be32(
+				XFS_FSB_TO_AGBNO(mp, mp->m_sb.sb_logstart));
+		rrec->rm_blockcount = cpu_to_be32(mp->m_sb.sb_logblocks);
+		rrec->rm_owner = cpu_to_be64(XFS_RMAP_OWN_LOG);
+		rrec->rm_offset = 0;
+		be16_add_cpu(&block->bb_numrecs, 1);
+	}
 }
 
 /*
@@ -207,6 +273,14 @@ xfs_agfblock_init(
 		agf->agf_refcount_level = cpu_to_be32(1);
 		agf->agf_refcount_blocks = cpu_to_be32(1);
 	}
+
+	if (is_log_ag(mp, id)) {
+		int64_t	logblocks = mp->m_sb.sb_logblocks;
+
+		be32_add_cpu(&agf->agf_freeblks, -logblocks);
+		agf->agf_longest = cpu_to_be32(id->agsize -
+			XFS_FSB_TO_AGBNO(mp, mp->m_sb.sb_logstart) - logblocks);
+	}
 }
 
 static void
@@ -339,14 +413,14 @@ xfs_ag_init_headers(
 	{ /* BNO root block */
 		.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_BNO_BLOCK(mp)),
 		.numblks = BTOBB(mp->m_sb.sb_blocksize),
-		.ops = &xfs_allocbt_buf_ops,
+		.ops = &xfs_bnobt_buf_ops,
 		.work = &xfs_bnoroot_init,
 		.need_init = true
 	},
 	{ /* CNT root block */
 		.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_CNT_BLOCK(mp)),
 		.numblks = BTOBB(mp->m_sb.sb_blocksize),
-		.ops = &xfs_allocbt_buf_ops,
+		.ops = &xfs_cntbt_buf_ops,
 		.work = &xfs_cntroot_init,
 		.need_init = true
 	},
@@ -361,7 +435,7 @@ xfs_ag_init_headers(
 	{ /* FINO root block */
 		.daddr = XFS_AGB_TO_DADDR(mp, id->agno, XFS_FIBT_BLOCK(mp)),
 		.numblks = BTOBB(mp->m_sb.sb_blocksize),
-		.ops = &xfs_inobt_buf_ops,
+		.ops = &xfs_finobt_buf_ops,
 		.work = &xfs_btroot_init,
 		.type = XFS_BTNUM_FINO,
 		.need_init =  xfs_sb_version_hasfinobt(&mp->m_sb)
@@ -461,3 +535,55 @@ xfs_ag_extend_space(
 				len, &XFS_RMAP_OINFO_SKIP_UPDATE,
 				XFS_AG_RESV_NONE);
 }
+
+/* Retrieve AG geometry. */
+int
+xfs_ag_get_geometry(
+	struct xfs_mount	*mp,
+	xfs_agnumber_t		agno,
+	struct xfs_ag_geometry	*ageo)
+{
+	struct xfs_buf		*agi_bp;
+	struct xfs_buf		*agf_bp;
+	struct xfs_agi		*agi;
+	struct xfs_agf		*agf;
+	struct xfs_perag	*pag;
+	unsigned int		freeblks;
+	int			error;
+
+	if (agno >= mp->m_sb.sb_agcount)
+		return -EINVAL;
+
+	/* Lock the AG headers. */
+	error = xfs_ialloc_read_agi(mp, NULL, agno, &agi_bp);
+	if (error)
+		return error;
+	error = xfs_alloc_read_agf(mp, NULL, agno, 0, &agf_bp);
+	if (error)
+		goto out_agi;
+	pag = xfs_perag_get(mp, agno);
+
+	/* Fill out form. */
+	memset(ageo, 0, sizeof(*ageo));
+	ageo->ag_number = agno;
+
+	agi = XFS_BUF_TO_AGI(agi_bp);
+	ageo->ag_icount = be32_to_cpu(agi->agi_count);
+	ageo->ag_ifree = be32_to_cpu(agi->agi_freecount);
+
+	agf = XFS_BUF_TO_AGF(agf_bp);
+	ageo->ag_length = be32_to_cpu(agf->agf_length);
+	freeblks = pag->pagf_freeblks +
+		   pag->pagf_flcount +
+		   pag->pagf_btreeblks -
+		   xfs_ag_resv_needed(pag, XFS_AG_RESV_NONE);
+	ageo->ag_freeblks = freeblks;
+	xfs_ag_geom_health(pag, ageo);
+
+	/* Release resources. */
+	xfs_perag_put(pag);
+	xfs_buf_relse(agf_bp);
+out_agi:
+	xfs_buf_relse(agi_bp);
+	return error;
+}
diff --git a/fs/xfs/libxfs/xfs_ag.h b/fs/xfs/libxfs/xfs_ag.h
index 412702e23f61..5166322807e7 100644
--- a/fs/xfs/libxfs/xfs_ag.h
+++ b/fs/xfs/libxfs/xfs_ag.h
@@ -26,5 +26,7 @@ struct aghdr_init_data {
 int xfs_ag_init_headers(struct xfs_mount *mp, struct aghdr_init_data *id);
 int xfs_ag_extend_space(struct xfs_mount *mp, struct xfs_trans *tp,
 			struct aghdr_init_data *id, xfs_extlen_t len);
+int xfs_ag_get_geometry(struct xfs_mount *mp, xfs_agnumber_t agno,
+			struct xfs_ag_geometry *ageo);
 
 #endif /* __LIBXFS_AG_H */
diff --git a/fs/xfs/libxfs/xfs_ag_resv.c b/fs/xfs/libxfs/xfs_ag_resv.c
index e701ebc36c06..87a9747f1d36 100644
--- a/fs/xfs/libxfs/xfs_ag_resv.c
+++ b/fs/xfs/libxfs/xfs_ag_resv.c
@@ -9,20 +9,12 @@
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_alloc.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_trans.h"
-#include "xfs_bit.h"
-#include "xfs_bmap.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_ag_resv.h"
-#include "xfs_trans_space.h"
 #include "xfs_rmap_btree.h"
 #include "xfs_btree.h"
 #include "xfs_refcount_btree.h"
@@ -281,7 +273,7 @@ xfs_ag_resv_init(
 			 */
 			ask = used = 0;
 
-			mp->m_inotbt_nores = true;
+			mp->m_finobt_nores = true;
 
 			error = xfs_refcountbt_calc_reserves(mp, tp, agno, &ask,
 					&used);
diff --git a/fs/xfs/libxfs/xfs_alloc.c b/fs/xfs/libxfs/xfs_alloc.c
index b715668886a4..372ad55631fc 100644
--- a/fs/xfs/libxfs/xfs_alloc.c
+++ b/fs/xfs/libxfs/xfs_alloc.c
@@ -13,7 +13,6 @@
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
-#include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_rmap.h"
 #include "xfs_alloc_btree.h"
@@ -21,7 +20,6 @@
 #include "xfs_extent_busy.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"
-#include "xfs_cksum.h"
 #include "xfs_trace.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
@@ -41,8 +39,6 @@ struct workqueue_struct *xfs_alloc_wq;
 STATIC int xfs_alloc_ag_vextent_exact(xfs_alloc_arg_t *);
 STATIC int xfs_alloc_ag_vextent_near(xfs_alloc_arg_t *);
 STATIC int xfs_alloc_ag_vextent_size(xfs_alloc_arg_t *);
-STATIC int xfs_alloc_ag_vextent_small(xfs_alloc_arg_t *,
-		xfs_btree_cur_t *, xfs_agblock_t *, xfs_extlen_t *, int *);
 
 /*
  * Size of the AGFL.  For CRC-enabled filesystes we steal a couple of slots in
@@ -555,7 +551,7 @@ static xfs_failaddr_t
 xfs_agfl_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	struct xfs_agfl	*agfl = XFS_BUF_TO_AGFL(bp);
 	int		i;
 
@@ -568,9 +564,9 @@ xfs_agfl_verify(
 	if (!xfs_sb_version_hascrc(&mp->m_sb))
 		return NULL;
 
-	if (!uuid_equal(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid))
+	if (!xfs_verify_magic(bp, agfl->agfl_magicnum))
 		return __this_address;
-	if (be32_to_cpu(agfl->agfl_magicnum) != XFS_AGFL_MAGIC)
+	if (!uuid_equal(&agfl->agfl_uuid, &mp->m_sb.sb_meta_uuid))
 		return __this_address;
 	/*
 	 * during growfs operations, the perag is not fully initialised,
@@ -596,7 +592,7 @@ static void
 xfs_agfl_read_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	xfs_failaddr_t	fa;
 
 	/*
@@ -621,7 +617,7 @@ static void
 xfs_agfl_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	xfs_failaddr_t		fa;
 
@@ -643,6 +639,7 @@ xfs_agfl_write_verify(
 
 const struct xfs_buf_ops xfs_agfl_buf_ops = {
 	.name = "xfs_agfl",
+	.magic = { cpu_to_be32(XFS_AGFL_MAGIC), cpu_to_be32(XFS_AGFL_MAGIC) },
 	.verify_read = xfs_agfl_read_verify,
 	.verify_write = xfs_agfl_write_verify,
 	.verify_struct = xfs_agfl_verify,
@@ -699,6 +696,107 @@ xfs_alloc_update_counters(
  */
 
 /*
+ * Deal with the case where only small freespaces remain. Either return the
+ * contents of the last freespace record, or allocate space from the freelist if
+ * there is nothing in the tree.
+ */
+STATIC int			/* error */
+xfs_alloc_ag_vextent_small(
+	struct xfs_alloc_arg	*args,	/* allocation argument structure */
+	struct xfs_btree_cur	*ccur,	/* optional by-size cursor */
+	xfs_agblock_t		*fbnop,	/* result block number */
+	xfs_extlen_t		*flenp,	/* result length */
+	int			*stat)	/* status: 0-freelist, 1-normal/none */
+{
+	int			error = 0;
+	xfs_agblock_t		fbno = NULLAGBLOCK;
+	xfs_extlen_t		flen = 0;
+	int			i = 0;
+
+	/*
+	 * If a cntbt cursor is provided, try to allocate the largest record in
+	 * the tree. Try the AGFL if the cntbt is empty, otherwise fail the
+	 * allocation. Make sure to respect minleft even when pulling from the
+	 * freelist.
+	 */
+	if (ccur)
+		error = xfs_btree_decrement(ccur, 0, &i);
+	if (error)
+		goto error;
+	if (i) {
+		error = xfs_alloc_get_rec(ccur, &fbno, &flen, &i);
+		if (error)
+			goto error;
+		XFS_WANT_CORRUPTED_GOTO(args->mp, i == 1, error);
+		goto out;
+	}
+
+	if (args->minlen != 1 || args->alignment != 1 ||
+	    args->resv == XFS_AG_RESV_AGFL ||
+	    (be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_flcount) <=
+	     args->minleft))
+		goto out;
+
+	error = xfs_alloc_get_freelist(args->tp, args->agbp, &fbno, 0);
+	if (error)
+		goto error;
+	if (fbno == NULLAGBLOCK)
+		goto out;
+
+	xfs_extent_busy_reuse(args->mp, args->agno, fbno, 1,
+			      xfs_alloc_allow_busy_reuse(args->datatype));
+
+	if (xfs_alloc_is_userdata(args->datatype)) {
+		struct xfs_buf	*bp;
+
+		bp = xfs_btree_get_bufs(args->mp, args->tp, args->agno, fbno);
+		if (!bp) {
+			error = -EFSCORRUPTED;
+			goto error;
+		}
+		xfs_trans_binval(args->tp, bp);
+	}
+	*fbnop = args->agbno = fbno;
+	*flenp = args->len = 1;
+	XFS_WANT_CORRUPTED_GOTO(args->mp,
+		fbno < be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_length),
+		error);
+	args->wasfromfl = 1;
+	trace_xfs_alloc_small_freelist(args);
+
+	/*
+	 * If we're feeding an AGFL block to something that doesn't live in the
+	 * free space, we need to clear out the OWN_AG rmap.
+	 */
+	error = xfs_rmap_free(args->tp, args->agbp, args->agno, fbno, 1,
+			      &XFS_RMAP_OINFO_AG);
+	if (error)
+		goto error;
+
+	*stat = 0;
+	return 0;
+
+out:
+	/*
+	 * Can't do the allocation, give up.
+	 */
+	if (flen < args->minlen) {
+		args->agbno = NULLAGBLOCK;
+		trace_xfs_alloc_small_notenough(args);
+		flen = 0;
+	}
+	*fbnop = fbno;
+	*flenp = flen;
+	*stat = 1;
+	trace_xfs_alloc_small_done(args);
+	return 0;
+
+error:
+	trace_xfs_alloc_small_error(args);
+	return error;
+}
+
+/*
  * Allocate a variable extent in the allocation group agno.
  * Type and bno are used to determine where in the allocation group the
  * extent will start.
@@ -1582,112 +1680,6 @@ out_nominleft:
 }
 
 /*
- * Deal with the case where only small freespaces remain.
- * Either return the contents of the last freespace record,
- * or allocate space from the freelist if there is nothing in the tree.
- */
-STATIC int			/* error */
-xfs_alloc_ag_vextent_small(
-	xfs_alloc_arg_t	*args,	/* allocation argument structure */
-	xfs_btree_cur_t	*ccur,	/* by-size cursor */
-	xfs_agblock_t	*fbnop,	/* result block number */
-	xfs_extlen_t	*flenp,	/* result length */
-	int		*stat)	/* status: 0-freelist, 1-normal/none */
-{
-	int		error;
-	xfs_agblock_t	fbno;
-	xfs_extlen_t	flen;
-	int		i;
-
-	if ((error = xfs_btree_decrement(ccur, 0, &i)))
-		goto error0;
-	if (i) {
-		if ((error = xfs_alloc_get_rec(ccur, &fbno, &flen, &i)))
-			goto error0;
-		XFS_WANT_CORRUPTED_GOTO(args->mp, i == 1, error0);
-	}
-	/*
-	 * Nothing in the btree, try the freelist.  Make sure
-	 * to respect minleft even when pulling from the
-	 * freelist.
-	 */
-	else if (args->minlen == 1 && args->alignment == 1 &&
-		 args->resv != XFS_AG_RESV_AGFL &&
-		 (be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_flcount)
-		  > args->minleft)) {
-		error = xfs_alloc_get_freelist(args->tp, args->agbp, &fbno, 0);
-		if (error)
-			goto error0;
-		if (fbno != NULLAGBLOCK) {
-			xfs_extent_busy_reuse(args->mp, args->agno, fbno, 1,
-			      xfs_alloc_allow_busy_reuse(args->datatype));
-
-			if (xfs_alloc_is_userdata(args->datatype)) {
-				xfs_buf_t	*bp;
-
-				bp = xfs_btree_get_bufs(args->mp, args->tp,
-					args->agno, fbno, 0);
-				if (!bp) {
-					error = -EFSCORRUPTED;
-					goto error0;
-				}
-				xfs_trans_binval(args->tp, bp);
-			}
-			args->len = 1;
-			args->agbno = fbno;
-			XFS_WANT_CORRUPTED_GOTO(args->mp,
-				args->agbno + args->len <=
-				be32_to_cpu(XFS_BUF_TO_AGF(args->agbp)->agf_length),
-				error0);
-			args->wasfromfl = 1;
-			trace_xfs_alloc_small_freelist(args);
-
-			/*
-			 * If we're feeding an AGFL block to something that
-			 * doesn't live in the free space, we need to clear
-			 * out the OWN_AG rmap.
-			 */
-			error = xfs_rmap_free(args->tp, args->agbp, args->agno,
-					fbno, 1, &XFS_RMAP_OINFO_AG);
-			if (error)
-				goto error0;
-
-			*stat = 0;
-			return 0;
-		}
-		/*
-		 * Nothing in the freelist.
-		 */
-		else
-			flen = 0;
-	}
-	/*
-	 * Can't allocate from the freelist for some reason.
-	 */
-	else {
-		fbno = NULLAGBLOCK;
-		flen = 0;
-	}
-	/*
-	 * Can't do the allocation, give up.
-	 */
-	if (flen < args->minlen) {
-		args->agbno = NULLAGBLOCK;
-		trace_xfs_alloc_small_notenough(args);
-		flen = 0;
-	}
-	*fbnop = fbno;
-	*flenp = flen;
-	*stat = 1;
-	trace_xfs_alloc_small_done(args);
-	return 0;
-
-error0:
-	trace_xfs_alloc_small_error(args);
-	return error;
-}
-
-/*
  * Free the extent starting at agno/bno for length.
  */
 STATIC int
@@ -2041,6 +2033,7 @@ xfs_alloc_space_available(
 	xfs_extlen_t		alloc_len, longest;
 	xfs_extlen_t		reservation; /* blocks that are still reserved */
 	int			available;
+	xfs_extlen_t		agflcount;
 
 	if (flags & XFS_ALLOC_FLAG_FREEING)
 		return true;
@@ -2053,8 +2046,13 @@ xfs_alloc_space_available(
 	if (longest < alloc_len)
 		return false;
 
-	/* do we have enough free space remaining for the allocation? */
-	available = (int)(pag->pagf_freeblks + pag->pagf_flcount -
+	/*
+	 * Do we have enough free space remaining for the allocation? Don't
+	 * account extra agfl blocks because we are about to defer free them,
+	 * making them unavailable until the current transaction commits.
+	 */
+	agflcount = min_t(xfs_extlen_t, pag->pagf_flcount, min_free);
+	available = (int)(pag->pagf_freeblks + agflcount -
 			  reservation - min_free - args->minleft);
 	if (available < (int)max(args->total, alloc_len))
 		return false;
@@ -2088,7 +2086,7 @@ xfs_free_agfl_block(
 	if (error)
 		return error;
 
-	bp = xfs_btree_get_bufs(tp->t_mountp, tp, agno, agbno, 0);
+	bp = xfs_btree_get_bufs(tp->t_mountp, tp, agno, agbno);
 	if (!bp)
 		return -EFSCORRUPTED;
 	xfs_trans_binval(tp, bp);
@@ -2236,6 +2234,9 @@ xfs_alloc_fix_freelist(
 	xfs_extlen_t		need;	/* total blocks needed in freelist */
 	int			error = 0;
 
+	/* deferred ops (AGFL block frees) require permanent transactions */
+	ASSERT(tp->t_flags & XFS_TRANS_PERM_LOG_RES);
+
 	if (!pag->pagf_init) {
 		error = xfs_alloc_read_agf(mp, tp, args->agno, flags, &agbp);
 		if (error)
@@ -2576,7 +2577,7 @@ static xfs_failaddr_t
 xfs_agf_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_agf		*agf = XFS_BUF_TO_AGF(bp);
 
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
@@ -2587,8 +2588,10 @@ xfs_agf_verify(
 			return __this_address;
 	}
 
-	if (!(agf->agf_magicnum == cpu_to_be32(XFS_AGF_MAGIC) &&
-	      XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) &&
+	if (!xfs_verify_magic(bp, agf->agf_magicnum))
+		return __this_address;
+
+	if (!(XFS_AGF_GOOD_VERSION(be32_to_cpu(agf->agf_versionnum)) &&
 	      be32_to_cpu(agf->agf_freeblks) <= be32_to_cpu(agf->agf_length) &&
 	      be32_to_cpu(agf->agf_flfirst) < xfs_agfl_size(mp) &&
 	      be32_to_cpu(agf->agf_fllast) < xfs_agfl_size(mp) &&
@@ -2632,7 +2635,7 @@ static void
 xfs_agf_read_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	xfs_failaddr_t	fa;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
@@ -2649,7 +2652,7 @@ static void
 xfs_agf_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	xfs_failaddr_t		fa;
 
@@ -2670,6 +2673,7 @@ xfs_agf_write_verify(
 
 const struct xfs_buf_ops xfs_agf_buf_ops = {
 	.name = "xfs_agf",
+	.magic = { cpu_to_be32(XFS_AGF_MAGIC), cpu_to_be32(XFS_AGF_MAGIC) },
 	.verify_read = xfs_agf_read_verify,
 	.verify_write = xfs_agf_write_verify,
 	.verify_struct = xfs_agf_verify,
@@ -3133,7 +3137,7 @@ xfs_alloc_has_record(
 
 /*
  * Walk all the blocks in the AGFL.  The @walk_fn can return any negative
- * error code or XFS_BTREE_QUERY_RANGE_ABORT.
+ * error code or XFS_ITER_*.
  */
 int
 xfs_agfl_walk(
diff --git a/fs/xfs/libxfs/xfs_alloc_btree.c b/fs/xfs/libxfs/xfs_alloc_btree.c
index 4e59cc8a2802..2a94543857a1 100644
--- a/fs/xfs/libxfs/xfs_alloc_btree.c
+++ b/fs/xfs/libxfs/xfs_alloc_btree.c
@@ -17,7 +17,6 @@
 #include "xfs_extent_busy.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_trans.h"
 
 
@@ -292,53 +291,39 @@ static xfs_failaddr_t
 xfs_allocbt_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	struct xfs_perag	*pag = bp->b_pag;
 	xfs_failaddr_t		fa;
 	unsigned int		level;
+	xfs_btnum_t		btnum = XFS_BTNUM_BNOi;
+
+	if (!xfs_verify_magic(bp, block->bb_magic))
+		return __this_address;
+
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		fa = xfs_btree_sblock_v5hdr_verify(bp);
+		if (fa)
+			return fa;
+	}
 
 	/*
-	 * magic number and level verification
-	 *
-	 * During growfs operations, we can't verify the exact level or owner as
-	 * the perag is not fully initialised and hence not attached to the
-	 * buffer.  In this case, check against the maximum tree depth.
+	 * The perag may not be attached during grow operations or fully
+	 * initialized from the AGF during log recovery. Therefore we can only
+	 * check against maximum tree depth from those contexts.
 	 *
-	 * Similarly, during log recovery we will have a perag structure
-	 * attached, but the agf information will not yet have been initialised
-	 * from the on disk AGF. Again, we can only check against maximum limits
-	 * in this case.
+	 * Otherwise check against the per-tree limit. Peek at one of the
+	 * verifier magic values to determine the type of tree we're verifying
+	 * against.
 	 */
 	level = be16_to_cpu(block->bb_level);
-	switch (block->bb_magic) {
-	case cpu_to_be32(XFS_ABTB_CRC_MAGIC):
-		fa = xfs_btree_sblock_v5hdr_verify(bp);
-		if (fa)
-			return fa;
-		/* fall through */
-	case cpu_to_be32(XFS_ABTB_MAGIC):
-		if (pag && pag->pagf_init) {
-			if (level >= pag->pagf_levels[XFS_BTNUM_BNOi])
-				return __this_address;
-		} else if (level >= mp->m_ag_maxlevels)
+	if (bp->b_ops->magic[0] == cpu_to_be32(XFS_ABTC_MAGIC))
+		btnum = XFS_BTNUM_CNTi;
+	if (pag && pag->pagf_init) {
+		if (level >= pag->pagf_levels[btnum])
 			return __this_address;
-		break;
-	case cpu_to_be32(XFS_ABTC_CRC_MAGIC):
-		fa = xfs_btree_sblock_v5hdr_verify(bp);
-		if (fa)
-			return fa;
-		/* fall through */
-	case cpu_to_be32(XFS_ABTC_MAGIC):
-		if (pag && pag->pagf_init) {
-			if (level >= pag->pagf_levels[XFS_BTNUM_CNTi])
-				return __this_address;
-		} else if (level >= mp->m_ag_maxlevels)
-			return __this_address;
-		break;
-	default:
+	} else if (level >= mp->m_ag_maxlevels)
 		return __this_address;
-	}
 
 	return xfs_btree_sblock_verify(bp, mp->m_alloc_mxr[level != 0]);
 }
@@ -377,13 +362,23 @@ xfs_allocbt_write_verify(
 
 }
 
-const struct xfs_buf_ops xfs_allocbt_buf_ops = {
-	.name = "xfs_allocbt",
+const struct xfs_buf_ops xfs_bnobt_buf_ops = {
+	.name = "xfs_bnobt",
+	.magic = { cpu_to_be32(XFS_ABTB_MAGIC),
+		   cpu_to_be32(XFS_ABTB_CRC_MAGIC) },
 	.verify_read = xfs_allocbt_read_verify,
 	.verify_write = xfs_allocbt_write_verify,
 	.verify_struct = xfs_allocbt_verify,
 };
 
+const struct xfs_buf_ops xfs_cntbt_buf_ops = {
+	.name = "xfs_cntbt",
+	.magic = { cpu_to_be32(XFS_ABTC_MAGIC),
+		   cpu_to_be32(XFS_ABTC_CRC_MAGIC) },
+	.verify_read = xfs_allocbt_read_verify,
+	.verify_write = xfs_allocbt_write_verify,
+	.verify_struct = xfs_allocbt_verify,
+};
 
 STATIC int
 xfs_bnobt_keys_inorder(
@@ -448,7 +443,7 @@ static const struct xfs_btree_ops xfs_bnobt_ops = {
 	.init_rec_from_cur	= xfs_allocbt_init_rec_from_cur,
 	.init_ptr_from_cur	= xfs_allocbt_init_ptr_from_cur,
 	.key_diff		= xfs_bnobt_key_diff,
-	.buf_ops		= &xfs_allocbt_buf_ops,
+	.buf_ops		= &xfs_bnobt_buf_ops,
 	.diff_two_keys		= xfs_bnobt_diff_two_keys,
 	.keys_inorder		= xfs_bnobt_keys_inorder,
 	.recs_inorder		= xfs_bnobt_recs_inorder,
@@ -470,7 +465,7 @@ static const struct xfs_btree_ops xfs_cntbt_ops = {
 	.init_rec_from_cur	= xfs_allocbt_init_rec_from_cur,
 	.init_ptr_from_cur	= xfs_allocbt_init_ptr_from_cur,
 	.key_diff		= xfs_cntbt_key_diff,
-	.buf_ops		= &xfs_allocbt_buf_ops,
+	.buf_ops		= &xfs_cntbt_buf_ops,
 	.diff_two_keys		= xfs_cntbt_diff_two_keys,
 	.keys_inorder		= xfs_cntbt_keys_inorder,
 	.recs_inorder		= xfs_cntbt_recs_inorder,
diff --git a/fs/xfs/libxfs/xfs_attr.c b/fs/xfs/libxfs/xfs_attr.c
index 844ed87b1900..d48fcf11cc35 100644
--- a/fs/xfs/libxfs/xfs_attr.c
+++ b/fs/xfs/libxfs/xfs_attr.c
@@ -9,23 +9,18 @@
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_bit.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
 #include "xfs_da_format.h"
 #include "xfs_da_btree.h"
 #include "xfs_attr_sf.h"
 #include "xfs_inode.h"
-#include "xfs_alloc.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
 #include "xfs_bmap_btree.h"
 #include "xfs_attr.h"
 #include "xfs_attr_leaf.h"
 #include "xfs_attr_remote.h"
-#include "xfs_error.h"
 #include "xfs_quota.h"
 #include "xfs_trans_space.h"
 #include "xfs_trace.h"
@@ -224,10 +219,10 @@ xfs_attr_try_sf_addname(
  */
 int
 xfs_attr_set_args(
-	struct xfs_da_args	*args,
-	struct xfs_buf          **leaf_bp)
+	struct xfs_da_args	*args)
 {
 	struct xfs_inode	*dp = args->dp;
+	struct xfs_buf          *leaf_bp = NULL;
 	int			error;
 
 	/*
@@ -255,7 +250,7 @@ xfs_attr_set_args(
 		 * It won't fit in the shortform, transform to a leaf block.
 		 * GROT: another possible req'mt for a double-split btree op.
 		 */
-		error = xfs_attr_shortform_to_leaf(args, leaf_bp);
+		error = xfs_attr_shortform_to_leaf(args, &leaf_bp);
 		if (error)
 			return error;
 
@@ -263,23 +258,16 @@ xfs_attr_set_args(
 		 * Prevent the leaf buffer from being unlocked so that a
 		 * concurrent AIL push cannot grab the half-baked leaf
 		 * buffer and run into problems with the write verifier.
+		 * Once we're done rolling the transaction we can release
+		 * the hold and add the attr to the leaf.
 		 */
-		xfs_trans_bhold(args->trans, *leaf_bp);
-
+		xfs_trans_bhold(args->trans, leaf_bp);
 		error = xfs_defer_finish(&args->trans);
-		if (error)
-			return error;
-
-		/*
-		 * Commit the leaf transformation.  We'll need another
-		 * (linked) transaction to add the new attribute to the
-		 * leaf.
-		 */
-		error = xfs_trans_roll_inode(&args->trans, dp);
-		if (error)
+		xfs_trans_bhold_release(args->trans, leaf_bp);
+		if (error) {
+			xfs_trans_brelse(args->trans, leaf_bp);
 			return error;
-		xfs_trans_bjoin(args->trans, *leaf_bp);
-		*leaf_bp = NULL;
+		}
 	}
 
 	if (xfs_bmap_one_block(dp, XFS_ATTR_FORK))
@@ -322,7 +310,6 @@ xfs_attr_set(
 	int			flags)
 {
 	struct xfs_mount	*mp = dp->i_mount;
-	struct xfs_buf		*leaf_bp = NULL;
 	struct xfs_da_args	args;
 	struct xfs_trans_res	tres;
 	int			rsvd = (flags & ATTR_ROOT) != 0;
@@ -381,9 +368,9 @@ xfs_attr_set(
 		goto out_trans_cancel;
 
 	xfs_trans_ijoin(args.trans, dp, 0);
-	error = xfs_attr_set_args(&args, &leaf_bp);
+	error = xfs_attr_set_args(&args);
 	if (error)
-		goto out_release_leaf;
+		goto out_trans_cancel;
 	if (!args.trans) {
 		/* shortform attribute has already been committed */
 		goto out_unlock;
@@ -408,9 +395,6 @@ out_unlock:
 	xfs_iunlock(dp, XFS_ILOCK_EXCL);
 	return error;
 
-out_release_leaf:
-	if (leaf_bp)
-		xfs_trans_brelse(args.trans, leaf_bp);
 out_trans_cancel:
 	if (args.trans)
 		xfs_trans_cancel(args.trans);
@@ -1336,3 +1320,20 @@ xfs_attr_node_get(xfs_da_args_t *args)
 	xfs_da_state_free(state);
 	return retval;
 }
+
+/* Returns true if the attribute entry name is valid. */
+bool
+xfs_attr_namecheck(
+	const void	*name,
+	size_t		length)
+{
+	/*
+	 * MAXNAMELEN includes the trailing null, but (name/length) leave it
+	 * out, so use >= for the length check.
+	 */
+	if (length >= MAXNAMELEN)
+		return false;
+
+	/* There shouldn't be any nulls here */
+	return !memchr(name, 0, length);
+}
diff --git a/fs/xfs/libxfs/xfs_attr.h b/fs/xfs/libxfs/xfs_attr.h
index bdf52a333f3f..ff28ebf3b635 100644
--- a/fs/xfs/libxfs/xfs_attr.h
+++ b/fs/xfs/libxfs/xfs_attr.h
@@ -112,7 +112,13 @@ typedef struct xfs_attr_list_context {
 	struct xfs_inode		*dp;		/* inode */
 	struct attrlist_cursor_kern	*cursor;	/* position in list */
 	char				*alist;		/* output buffer */
-	int				seen_enough;	/* T/F: seen enough of list? */
+
+	/*
+	 * Abort attribute list iteration if non-zero.  Can be used to pass
+	 * error values to the xfs_attr_list caller.
+	 */
+	int				seen_enough;
+
 	ssize_t				count;		/* num used entries */
 	int				dupcnt;		/* count dup hashvals seen */
 	int				bufsize;	/* total buffer size */
@@ -140,11 +146,11 @@ int xfs_attr_get(struct xfs_inode *ip, const unsigned char *name,
 		 unsigned char *value, int *valuelenp, int flags);
 int xfs_attr_set(struct xfs_inode *dp, const unsigned char *name,
 		 unsigned char *value, int valuelen, int flags);
-int xfs_attr_set_args(struct xfs_da_args *args, struct xfs_buf **leaf_bp);
+int xfs_attr_set_args(struct xfs_da_args *args);
 int xfs_attr_remove(struct xfs_inode *dp, const unsigned char *name, int flags);
 int xfs_attr_remove_args(struct xfs_da_args *args);
 int xfs_attr_list(struct xfs_inode *dp, char *buffer, int bufsize,
 		  int flags, struct attrlist_cursor_kern *cursor);
-
+bool xfs_attr_namecheck(const void *name, size_t length);
 
 #endif	/* __XFS_ATTR_H__ */
diff --git a/fs/xfs/libxfs/xfs_attr_leaf.c b/fs/xfs/libxfs/xfs_attr_leaf.c
index 2652d00842d6..70eb941d02e4 100644
--- a/fs/xfs/libxfs/xfs_attr_leaf.c
+++ b/fs/xfs/libxfs/xfs_attr_leaf.c
@@ -10,14 +10,12 @@
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_bit.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_da_format.h"
 #include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_bmap_btree.h"
 #include "xfs_bmap.h"
 #include "xfs_attr_sf.h"
@@ -27,7 +25,6 @@
 #include "xfs_error.h"
 #include "xfs_trace.h"
 #include "xfs_buf_item.h"
-#include "xfs_cksum.h"
 #include "xfs_dir2.h"
 #include "xfs_log.h"
 
@@ -240,30 +237,19 @@ xfs_attr3_leaf_verify(
 	struct xfs_buf			*bp)
 {
 	struct xfs_attr3_icleaf_hdr	ichdr;
-	struct xfs_mount		*mp = bp->b_target->bt_mount;
+	struct xfs_mount		*mp = bp->b_mount;
 	struct xfs_attr_leafblock	*leaf = bp->b_addr;
 	struct xfs_attr_leaf_entry	*entries;
 	uint32_t			end;	/* must be 32bit - see below */
 	int				i;
+	xfs_failaddr_t			fa;
 
 	xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf);
 
-	if (xfs_sb_version_hascrc(&mp->m_sb)) {
-		struct xfs_da3_node_hdr *hdr3 = bp->b_addr;
-
-		if (ichdr.magic != XFS_ATTR3_LEAF_MAGIC)
-			return __this_address;
+	fa = xfs_da3_blkinfo_verify(bp, bp->b_addr);
+	if (fa)
+		return fa;
 
-		if (!uuid_equal(&hdr3->info.uuid, &mp->m_sb.sb_meta_uuid))
-			return __this_address;
-		if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn)
-			return __this_address;
-		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->info.lsn)))
-			return __this_address;
-	} else {
-		if (ichdr.magic != XFS_ATTR_LEAF_MAGIC)
-			return __this_address;
-	}
 	/*
 	 * In recovery there is a transient state where count == 0 is valid
 	 * because we may have transitioned an empty shortform attr to a leaf
@@ -324,7 +310,7 @@ static void
 xfs_attr3_leaf_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	struct xfs_attr3_leaf_hdr *hdr3 = bp->b_addr;
 	xfs_failaddr_t		fa;
@@ -354,7 +340,7 @@ static void
 xfs_attr3_leaf_read_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	xfs_failaddr_t		fa;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
@@ -369,6 +355,8 @@ xfs_attr3_leaf_read_verify(
 
 const struct xfs_buf_ops xfs_attr3_leaf_buf_ops = {
 	.name = "xfs_attr3_leaf",
+	.magic16 = { cpu_to_be16(XFS_ATTR_LEAF_MAGIC),
+		     cpu_to_be16(XFS_ATTR3_LEAF_MAGIC) },
 	.verify_read = xfs_attr3_leaf_read_verify,
 	.verify_write = xfs_attr3_leaf_write_verify,
 	.verify_struct = xfs_attr3_leaf_verify,
@@ -874,7 +862,7 @@ xfs_attr_shortform_allfit(
 	struct xfs_attr3_icleaf_hdr leafhdr;
 	int			bytes;
 	int			i;
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 
 	leaf = bp->b_addr;
 	xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &leafhdr, leaf);
@@ -1534,7 +1522,7 @@ xfs_attr_leaf_order(
 {
 	struct xfs_attr3_icleaf_hdr ichdr1;
 	struct xfs_attr3_icleaf_hdr ichdr2;
-	struct xfs_mount *mp = leaf1_bp->b_target->bt_mount;
+	struct xfs_mount *mp = leaf1_bp->b_mount;
 
 	xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr1, leaf1_bp->b_addr);
 	xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr2, leaf2_bp->b_addr);
@@ -2577,7 +2565,7 @@ xfs_attr_leaf_lasthash(
 {
 	struct xfs_attr3_icleaf_hdr ichdr;
 	struct xfs_attr_leaf_entry *entries;
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 
 	xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, bp->b_addr);
 	entries = xfs_attr3_leaf_entryp(bp->b_addr);
diff --git a/fs/xfs/libxfs/xfs_attr_remote.c b/fs/xfs/libxfs/xfs_attr_remote.c
index d89363c6b523..4eb30d357045 100644
--- a/fs/xfs/libxfs/xfs_attr_remote.c
+++ b/fs/xfs/libxfs/xfs_attr_remote.c
@@ -16,18 +16,10 @@
 #include "xfs_da_format.h"
 #include "xfs_da_btree.h"
 #include "xfs_inode.h"
-#include "xfs_alloc.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
 #include "xfs_attr.h"
-#include "xfs_attr_leaf.h"
-#include "xfs_attr_remote.h"
-#include "xfs_trans_space.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
-#include "xfs_buf_item.h"
 #include "xfs_error.h"
 
 #define ATTR_RMTVALUE_MAPSIZE	1	/* # of map entries at once */
@@ -79,6 +71,7 @@ xfs_attr3_rmt_hdr_ok(
 static xfs_failaddr_t
 xfs_attr3_rmt_verify(
 	struct xfs_mount	*mp,
+	struct xfs_buf		*bp,
 	void			*ptr,
 	int			fsbsize,
 	xfs_daddr_t		bno)
@@ -87,7 +80,7 @@ xfs_attr3_rmt_verify(
 
 	if (!xfs_sb_version_hascrc(&mp->m_sb))
 		return __this_address;
-	if (rmt->rm_magic != cpu_to_be32(XFS_ATTR3_RMT_MAGIC))
+	if (!xfs_verify_magic(bp, rmt->rm_magic))
 		return __this_address;
 	if (!uuid_equal(&rmt->rm_uuid, &mp->m_sb.sb_meta_uuid))
 		return __this_address;
@@ -110,7 +103,7 @@ __xfs_attr3_rmt_read_verify(
 	bool		check_crc,
 	xfs_failaddr_t	*failaddr)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	char		*ptr;
 	int		len;
 	xfs_daddr_t	bno;
@@ -131,7 +124,7 @@ __xfs_attr3_rmt_read_verify(
 			*failaddr = __this_address;
 			return -EFSBADCRC;
 		}
-		*failaddr = xfs_attr3_rmt_verify(mp, ptr, blksize, bno);
+		*failaddr = xfs_attr3_rmt_verify(mp, bp, ptr, blksize, bno);
 		if (*failaddr)
 			return -EFSCORRUPTED;
 		len -= blksize;
@@ -174,7 +167,7 @@ static void
 xfs_attr3_rmt_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	xfs_failaddr_t	fa;
 	int		blksize = mp->m_attr_geo->blksize;
 	char		*ptr;
@@ -193,7 +186,7 @@ xfs_attr3_rmt_write_verify(
 	while (len > 0) {
 		struct xfs_attr3_rmt_hdr *rmt = (struct xfs_attr3_rmt_hdr *)ptr;
 
-		fa = xfs_attr3_rmt_verify(mp, ptr, blksize, bno);
+		fa = xfs_attr3_rmt_verify(mp, bp, ptr, blksize, bno);
 		if (fa) {
 			xfs_verifier_error(bp, -EFSCORRUPTED, fa);
 			return;
@@ -220,6 +213,7 @@ xfs_attr3_rmt_write_verify(
 
 const struct xfs_buf_ops xfs_attr3_rmt_buf_ops = {
 	.name = "xfs_attr3_rmt",
+	.magic = { 0, cpu_to_be32(XFS_ATTR3_RMT_MAGIC) },
 	.verify_read = xfs_attr3_rmt_read_verify,
 	.verify_write = xfs_attr3_rmt_write_verify,
 	.verify_struct = xfs_attr3_rmt_verify_struct,
@@ -533,7 +527,7 @@ xfs_attr_rmtval_set(
 		dblkno = XFS_FSB_TO_DADDR(mp, map.br_startblock),
 		dblkcnt = XFS_FSB_TO_BB(mp, map.br_blockcount);
 
-		bp = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt, 0);
+		bp = xfs_buf_get(mp->m_ddev_targp, dblkno, dblkcnt);
 		if (!bp)
 			return -ENOMEM;
 		bp->b_ops = &xfs_attr3_rmt_buf_ops;
diff --git a/fs/xfs/libxfs/xfs_bit.c b/fs/xfs/libxfs/xfs_bit.c
index 40ce5f3094d1..7071ff98fdbc 100644
--- a/fs/xfs/libxfs/xfs_bit.c
+++ b/fs/xfs/libxfs/xfs_bit.c
@@ -5,7 +5,6 @@
  */
 #include "xfs.h"
 #include "xfs_log_format.h"
-#include "xfs_bit.h"
 
 /*
  * XFS bit manipulation routines, used in non-realtime code.
diff --git a/fs/xfs/libxfs/xfs_bmap.c b/fs/xfs/libxfs/xfs_bmap.c
index 332eefa2700b..baf0b72c0a37 100644
--- a/fs/xfs/libxfs/xfs_bmap.c
+++ b/fs/xfs/libxfs/xfs_bmap.c
@@ -13,14 +13,10 @@
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_dir2.h"
 #include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
-#include "xfs_extfree_item.h"
 #include "xfs_alloc.h"
 #include "xfs_bmap.h"
 #include "xfs_bmap_util.h"
@@ -32,7 +28,6 @@
 #include "xfs_trans_space.h"
 #include "xfs_buf_item.h"
 #include "xfs_trace.h"
-#include "xfs_symlink.h"
 #include "xfs_attr_leaf.h"
 #include "xfs_filestream.h"
 #include "xfs_rmap.h"
@@ -370,7 +365,7 @@ xfs_bmap_check_leaf_extents(
 		bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
 		if (!bp) {
 			bp_release = 1;
-			error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
+			error = xfs_btree_read_bufl(mp, NULL, bno, &bp,
 						XFS_BMAP_BTREE_REF,
 						&xfs_bmbt_buf_ops);
 			if (error)
@@ -454,7 +449,7 @@ xfs_bmap_check_leaf_extents(
 		bp = xfs_bmap_get_bp(cur, XFS_FSB_TO_DADDR(mp, bno));
 		if (!bp) {
 			bp_release = 1;
-			error = xfs_btree_read_bufl(mp, NULL, bno, 0, &bp,
+			error = xfs_btree_read_bufl(mp, NULL, bno, &bp,
 						XFS_BMAP_BTREE_REF,
 						&xfs_bmbt_buf_ops);
 			if (error)
@@ -577,47 +572,49 @@ __xfs_bmap_add_free(
  */
 
 /*
- * Transform a btree format file with only one leaf node, where the
- * extents list will fit in the inode, into an extents format file.
- * Since the file extents are already in-core, all we have to do is
- * give up the space for the btree root and pitch the leaf block.
+ * Convert the inode format to extent format if it currently is in btree format,
+ * but the extent list is small enough that it fits into the extent format.
+ *
+ * Since the extents are already in-core, all we have to do is give up the space
+ * for the btree root and pitch the leaf block.
  */
 STATIC int				/* error */
 xfs_bmap_btree_to_extents(
-	xfs_trans_t		*tp,	/* transaction pointer */
-	xfs_inode_t		*ip,	/* incore inode pointer */
-	xfs_btree_cur_t		*cur,	/* btree cursor */
+	struct xfs_trans	*tp,	/* transaction pointer */
+	struct xfs_inode	*ip,	/* incore inode pointer */
+	struct xfs_btree_cur	*cur,	/* btree cursor */
 	int			*logflagsp, /* inode logging flags */
 	int			whichfork)  /* data or attr fork */
 {
-	/* REFERENCED */
+	struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, whichfork);
+	struct xfs_mount	*mp = ip->i_mount;
+	struct xfs_btree_block	*rblock = ifp->if_broot;
 	struct xfs_btree_block	*cblock;/* child btree block */
 	xfs_fsblock_t		cbno;	/* child block number */
 	xfs_buf_t		*cbp;	/* child block's buffer */
 	int			error;	/* error return value */
-	struct xfs_ifork	*ifp;	/* inode fork data */
-	xfs_mount_t		*mp;	/* mount point structure */
 	__be64			*pp;	/* ptr to block address */
-	struct xfs_btree_block	*rblock;/* root btree block */
 	struct xfs_owner_info	oinfo;
 
-	mp = ip->i_mount;
-	ifp = XFS_IFORK_PTR(ip, whichfork);
+	/* check if we actually need the extent format first: */
+	if (!xfs_bmap_wants_extents(ip, whichfork))
+		return 0;
+
+	ASSERT(cur);
 	ASSERT(whichfork != XFS_COW_FORK);
 	ASSERT(ifp->if_flags & XFS_IFEXTENTS);
 	ASSERT(XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE);
-	rblock = ifp->if_broot;
 	ASSERT(be16_to_cpu(rblock->bb_level) == 1);
 	ASSERT(be16_to_cpu(rblock->bb_numrecs) == 1);
 	ASSERT(xfs_bmbt_maxrecs(mp, ifp->if_broot_bytes, 0) == 1);
+
 	pp = XFS_BMAP_BROOT_PTR_ADDR(mp, rblock, 1, ifp->if_broot_bytes);
 	cbno = be64_to_cpu(*pp);
-	*logflagsp = 0;
 #ifdef DEBUG
 	XFS_WANT_CORRUPTED_RETURN(cur->bc_mp,
 			xfs_btree_check_lptr(cur, cbno, 1));
 #endif
-	error = xfs_btree_read_bufl(mp, tp, cbno, 0, &cbp, XFS_BMAP_BTREE_REF,
+	error = xfs_btree_read_bufl(mp, tp, cbno, &cbp, XFS_BMAP_BTREE_REF,
 				&xfs_bmbt_buf_ops);
 	if (error)
 		return error;
@@ -635,7 +632,7 @@ xfs_bmap_btree_to_extents(
 	ASSERT(ifp->if_broot == NULL);
 	ASSERT((ifp->if_flags & XFS_IFBROOT) == 0);
 	XFS_IFORK_FMT_SET(ip, whichfork, XFS_DINODE_FMT_EXTENTS);
-	*logflagsp = XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
+	*logflagsp |= XFS_ILOG_CORE | xfs_ilog_fext(whichfork);
 	return 0;
 }
 
@@ -730,7 +727,7 @@ xfs_bmap_extents_to_btree(
 	cur->bc_private.b.allocated++;
 	ip->i_d.di_nblocks++;
 	xfs_trans_mod_dquot_byino(tp, ip, XFS_TRANS_DQ_BCOUNT, 1L);
-	abp = xfs_btree_get_bufl(mp, tp, args.fsbno, 0);
+	abp = xfs_btree_get_bufl(mp, tp, args.fsbno);
 	if (!abp) {
 		error = -EFSCORRUPTED;
 		goto out_unreserve_dquot;
@@ -876,7 +873,7 @@ xfs_bmap_local_to_extents(
 	ASSERT(args.fsbno != NULLFSBLOCK);
 	ASSERT(args.len == 1);
 	tp->t_firstblock = args.fsbno;
-	bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno, 0);
+	bp = xfs_btree_get_bufl(args.mp, tp, args.fsbno);
 
 	/*
 	 * Initialize the block, copy the data and log the remote buffer.
@@ -1189,7 +1186,10 @@ xfs_iread_extents(
 	 * Root level must use BMAP_BROOT_PTR_ADDR macro to get ptr out.
 	 */
 	level = be16_to_cpu(block->bb_level);
-	ASSERT(level > 0);
+	if (unlikely(level == 0)) {
+		XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_LOW, mp);
+		return -EFSCORRUPTED;
+	}
 	pp = XFS_BMAP_BROOT_PTR_ADDR(mp, block, 1, ifp->if_broot_bytes);
 	bno = be64_to_cpu(*pp);
 
@@ -1198,7 +1198,7 @@ xfs_iread_extents(
 	 * pointer (leftmost) at each level.
 	 */
 	while (level-- > 0) {
-		error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
+		error = xfs_btree_read_bufl(mp, tp, bno, &bp,
 				XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops);
 		if (error)
 			goto out;
@@ -1271,7 +1271,7 @@ xfs_iread_extents(
 		 */
 		if (bno == NULLFSBLOCK)
 			break;
-		error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
+		error = xfs_btree_read_bufl(mp, tp, bno, &bp,
 				XFS_BMAP_BTREE_REF, &xfs_bmbt_buf_ops);
 		if (error)
 			goto out;
@@ -2004,6 +2004,9 @@ xfs_bmap_add_extent_delay_real(
 			goto done;
 	}
 
+	if (da_new != da_old)
+		xfs_mod_delalloc(mp, (int64_t)da_new - da_old);
+
 	if (bma->cur) {
 		da_new += bma->cur->bc_private.b.allocated;
 		bma->cur->bc_private.b.allocated = 0;
@@ -2029,7 +2032,7 @@ done:
 /*
  * Convert an unwritten allocation to a real allocation or vice versa.
  */
-STATIC int				/* error */
+int					/* error */
 xfs_bmap_add_extent_unwritten_real(
 	struct xfs_trans	*tp,
 	xfs_inode_t		*ip,	/* incore inode pointer */
@@ -2635,6 +2638,7 @@ xfs_bmap_add_extent_hole_delay(
 		/*
 		 * Nothing to do for disk quota accounting here.
 		 */
+		xfs_mod_delalloc(ip->i_mount, (int64_t)newlen - oldlen);
 	}
 }
 
@@ -3347,8 +3351,10 @@ xfs_bmap_btalloc_accounting(
 		 * already have quota reservation and there's nothing to do
 		 * yet.
 		 */
-		if (ap->wasdel)
+		if (ap->wasdel) {
+			xfs_mod_delalloc(ap->ip->i_mount, -(int64_t)args->len);
 			return;
+		}
 
 		/*
 		 * Otherwise, we've allocated blocks in a hole. The transaction
@@ -3367,8 +3373,10 @@ xfs_bmap_btalloc_accounting(
 	/* data/attr fork only */
 	ap->ip->i_d.di_nblocks += args->len;
 	xfs_trans_log_inode(ap->tp, ap->ip, XFS_ILOG_CORE);
-	if (ap->wasdel)
+	if (ap->wasdel) {
 		ap->ip->i_delayed_blks -= args->len;
+		xfs_mod_delalloc(ap->ip->i_mount, -(int64_t)args->len);
+	}
 	xfs_trans_mod_dquot_byino(ap->tp, ap->ip,
 		ap->wasdel ? XFS_TRANS_DQ_DELBCOUNT : XFS_TRANS_DQ_BCOUNT,
 		args->len);
@@ -3685,17 +3693,6 @@ xfs_trim_extent(
 	}
 }
 
-/* trim extent to within eof */
-void
-xfs_trim_extent_eof(
-	struct xfs_bmbt_irec	*irec,
-	struct xfs_inode	*ip)
-
-{
-	xfs_trim_extent(irec, 0, XFS_B_TO_FSB(ip->i_mount,
-					      i_size_read(VFS_I(ip))));
-}
-
 /*
  * Trim the returned map to the required bounds
  */
@@ -3975,6 +3972,7 @@ xfs_bmapi_reserve_delalloc(
 
 
 	ip->i_delayed_blks += alen;
+	xfs_mod_delalloc(ip->i_mount, alen + indlen);
 
 	got->br_startoff = aoff;
 	got->br_startblock = nullstartblock(indlen);
@@ -4203,6 +4201,44 @@ xfs_bmapi_convert_unwritten(
 	return 0;
 }
 
+static inline xfs_extlen_t
+xfs_bmapi_minleft(
+	struct xfs_trans	*tp,
+	struct xfs_inode	*ip,
+	int			fork)
+{
+	if (tp && tp->t_firstblock != NULLFSBLOCK)
+		return 0;
+	if (XFS_IFORK_FORMAT(ip, fork) != XFS_DINODE_FMT_BTREE)
+		return 1;
+	return be16_to_cpu(XFS_IFORK_PTR(ip, fork)->if_broot->bb_level) + 1;
+}
+
+/*
+ * Log whatever the flags say, even if error.  Otherwise we might miss detecting
+ * a case where the data is changed, there's an error, and it's not logged so we
+ * don't shutdown when we should.  Don't bother logging extents/btree changes if
+ * we converted to the other format.
+ */
+static void
+xfs_bmapi_finish(
+	struct xfs_bmalloca	*bma,
+	int			whichfork,
+	int			error)
+{
+	if ((bma->logflags & xfs_ilog_fext(whichfork)) &&
+	    XFS_IFORK_FORMAT(bma->ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
+		bma->logflags &= ~xfs_ilog_fext(whichfork);
+	else if ((bma->logflags & xfs_ilog_fbroot(whichfork)) &&
+		 XFS_IFORK_FORMAT(bma->ip, whichfork) != XFS_DINODE_FMT_BTREE)
+		bma->logflags &= ~xfs_ilog_fbroot(whichfork);
+
+	if (bma->logflags)
+		xfs_trans_log_inode(bma->tp, bma->ip, bma->logflags);
+	if (bma->cur)
+		xfs_btree_del_cursor(bma->cur, error);
+}
+
 /*
  * Map file blocks to filesystem blocks, and allocate blocks or convert the
  * extent state if necessary.  Details behaviour is controlled by the flags
@@ -4220,9 +4256,13 @@ xfs_bmapi_write(
 	struct xfs_bmbt_irec	*mval,		/* output: map values */
 	int			*nmap)		/* i/o: mval size/count */
 {
+	struct xfs_bmalloca	bma = {
+		.tp		= tp,
+		.ip		= ip,
+		.total		= total,
+	};
 	struct xfs_mount	*mp = ip->i_mount;
 	struct xfs_ifork	*ifp;
-	struct xfs_bmalloca	bma = { NULL };	/* args for xfs_bmap_alloc */
 	xfs_fileoff_t		end;		/* end of mapped file region */
 	bool			eof = false;	/* after the end of extents */
 	int			error;		/* error return */
@@ -4247,9 +4287,7 @@ xfs_bmapi_write(
 
 	ASSERT(*nmap >= 1);
 	ASSERT(*nmap <= XFS_BMAP_MAX_NMAP);
-	ASSERT(tp != NULL ||
-	       (flags & (XFS_BMAPI_CONVERT | XFS_BMAPI_COWFORK)) ==
-			(XFS_BMAPI_CONVERT | XFS_BMAPI_COWFORK));
+	ASSERT(tp != NULL);
 	ASSERT(len > 0);
 	ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_LOCAL);
 	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
@@ -4282,34 +4320,21 @@ xfs_bmapi_write(
 
 	XFS_STATS_INC(mp, xs_blk_mapw);
 
-	if (!tp || tp->t_firstblock == NULLFSBLOCK) {
-		if (XFS_IFORK_FORMAT(ip, whichfork) == XFS_DINODE_FMT_BTREE)
-			bma.minleft = be16_to_cpu(ifp->if_broot->bb_level) + 1;
-		else
-			bma.minleft = 1;
-	} else {
-		bma.minleft = 0;
-	}
-
 	if (!(ifp->if_flags & XFS_IFEXTENTS)) {
 		error = xfs_iread_extents(tp, ip, whichfork);
 		if (error)
 			goto error0;
 	}
 
-	n = 0;
-	end = bno + len;
-	obno = bno;
-
 	if (!xfs_iext_lookup_extent(ip, ifp, bno, &bma.icur, &bma.got))
 		eof = true;
 	if (!xfs_iext_peek_prev_extent(ifp, &bma.icur, &bma.prev))
 		bma.prev.br_startoff = NULLFILEOFF;
-	bma.tp = tp;
-	bma.ip = ip;
-	bma.total = total;
-	bma.datatype = 0;
+	bma.minleft = xfs_bmapi_minleft(tp, ip, whichfork);
 
+	n = 0;
+	end = bno + len;
+	obno = bno;
 	while (bno < end && n < *nmap) {
 		bool			need_alloc = false, wasdelay = false;
 
@@ -4323,26 +4348,7 @@ xfs_bmapi_write(
 			ASSERT(!((flags & XFS_BMAPI_CONVERT) &&
 			         (flags & XFS_BMAPI_COWFORK)));
 
-			if (flags & XFS_BMAPI_DELALLOC) {
-				/*
-				 * For the COW fork we can reasonably get a
-				 * request for converting an extent that races
-				 * with other threads already having converted
-				 * part of it, as there converting COW to
-				 * regular blocks is not protected using the
-				 * IOLOCK.
-				 */
-				ASSERT(flags & XFS_BMAPI_COWFORK);
-				if (!(flags & XFS_BMAPI_COWFORK)) {
-					error = -EIO;
-					goto error0;
-				}
-
-				if (eof || bno >= end)
-					break;
-			} else {
-				need_alloc = true;
-			}
+			need_alloc = true;
 		} else if (isnullstartblock(bma.got.br_startblock)) {
 			wasdelay = true;
 		}
@@ -4351,8 +4357,7 @@ xfs_bmapi_write(
 		 * First, deal with the hole before the allocated space
 		 * that we found, if any.
 		 */
-		if ((need_alloc || wasdelay) &&
-		    !(flags & XFS_BMAPI_CONVERT_ONLY)) {
+		if (need_alloc || wasdelay) {
 			bma.eof = eof;
 			bma.conv = !!(flags & XFS_BMAPI_CONVERT);
 			bma.wasdel = wasdelay;
@@ -4420,49 +4425,130 @@ xfs_bmapi_write(
 	}
 	*nmap = n;
 
-	/*
-	 * Transform from btree to extents, give it cur.
-	 */
-	if (xfs_bmap_wants_extents(ip, whichfork)) {
-		int		tmp_logflags = 0;
-
-		ASSERT(bma.cur);
-		error = xfs_bmap_btree_to_extents(tp, ip, bma.cur,
-			&tmp_logflags, whichfork);
-		bma.logflags |= tmp_logflags;
-		if (error)
-			goto error0;
-	}
+	error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, &bma.logflags,
+			whichfork);
+	if (error)
+		goto error0;
 
 	ASSERT(XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE ||
 	       XFS_IFORK_NEXTENTS(ip, whichfork) >
 		XFS_IFORK_MAXEXT(ip, whichfork));
-	error = 0;
+	xfs_bmapi_finish(&bma, whichfork, 0);
+	xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
+		orig_nmap, *nmap);
+	return 0;
 error0:
+	xfs_bmapi_finish(&bma, whichfork, error);
+	return error;
+}
+
+/*
+ * Convert an existing delalloc extent to real blocks based on file offset. This
+ * attempts to allocate the entire delalloc extent and may require multiple
+ * invocations to allocate the target offset if a large enough physical extent
+ * is not available.
+ */
+int
+xfs_bmapi_convert_delalloc(
+	struct xfs_inode	*ip,
+	int			whichfork,
+	xfs_fileoff_t		offset_fsb,
+	struct xfs_bmbt_irec	*imap,
+	unsigned int		*seq)
+{
+	struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, whichfork);
+	struct xfs_mount	*mp = ip->i_mount;
+	struct xfs_bmalloca	bma = { NULL };
+	struct xfs_trans	*tp;
+	int			error;
+
 	/*
-	 * Log everything.  Do this after conversion, there's no point in
-	 * logging the extent records if we've converted to btree format.
+	 * Space for the extent and indirect blocks was reserved when the
+	 * delalloc extent was created so there's no need to do so here.
 	 */
-	if ((bma.logflags & xfs_ilog_fext(whichfork)) &&
-	    XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_EXTENTS)
-		bma.logflags &= ~xfs_ilog_fext(whichfork);
-	else if ((bma.logflags & xfs_ilog_fbroot(whichfork)) &&
-		 XFS_IFORK_FORMAT(ip, whichfork) != XFS_DINODE_FMT_BTREE)
-		bma.logflags &= ~xfs_ilog_fbroot(whichfork);
+	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, 0, 0,
+				XFS_TRANS_RESERVE, &tp);
+	if (error)
+		return error;
+
+	xfs_ilock(ip, XFS_ILOCK_EXCL);
+	xfs_trans_ijoin(tp, ip, 0);
+
+	if (!xfs_iext_lookup_extent(ip, ifp, offset_fsb, &bma.icur, &bma.got) ||
+	    bma.got.br_startoff > offset_fsb) {
+		/*
+		 * No extent found in the range we are trying to convert.  This
+		 * should only happen for the COW fork, where another thread
+		 * might have moved the extent to the data fork in the meantime.
+		 */
+		WARN_ON_ONCE(whichfork != XFS_COW_FORK);
+		error = -EAGAIN;
+		goto out_trans_cancel;
+	}
+
 	/*
-	 * Log whatever the flags say, even if error.  Otherwise we might miss
-	 * detecting a case where the data is changed, there's an error,
-	 * and it's not logged so we don't shutdown when we should.
+	 * If we find a real extent here we raced with another thread converting
+	 * the extent.  Just return the real extent at this offset.
 	 */
-	if (bma.logflags)
-		xfs_trans_log_inode(tp, ip, bma.logflags);
+	if (!isnullstartblock(bma.got.br_startblock)) {
+		*imap = bma.got;
+		*seq = READ_ONCE(ifp->if_seq);
+		goto out_trans_cancel;
+	}
+
+	bma.tp = tp;
+	bma.ip = ip;
+	bma.wasdel = true;
+	bma.offset = bma.got.br_startoff;
+	bma.length = max_t(xfs_filblks_t, bma.got.br_blockcount, MAXEXTLEN);
+	bma.total = XFS_EXTENTADD_SPACE_RES(ip->i_mount, XFS_DATA_FORK);
+	bma.minleft = xfs_bmapi_minleft(tp, ip, whichfork);
+	if (whichfork == XFS_COW_FORK)
+		bma.flags = XFS_BMAPI_COWFORK | XFS_BMAPI_PREALLOC;
+
+	if (!xfs_iext_peek_prev_extent(ifp, &bma.icur, &bma.prev))
+		bma.prev.br_startoff = NULLFILEOFF;
+
+	error = xfs_bmapi_allocate(&bma);
+	if (error)
+		goto out_finish;
+
+	error = -ENOSPC;
+	if (WARN_ON_ONCE(bma.blkno == NULLFSBLOCK))
+		goto out_finish;
+	error = -EFSCORRUPTED;
+	if (WARN_ON_ONCE(!bma.got.br_startblock && !XFS_IS_REALTIME_INODE(ip)))
+		goto out_finish;
+
+	XFS_STATS_ADD(mp, xs_xstrat_bytes, XFS_FSB_TO_B(mp, bma.length));
+	XFS_STATS_INC(mp, xs_xstrat_quick);
 
-	if (bma.cur) {
-		xfs_btree_del_cursor(bma.cur, error);
+	ASSERT(!isnullstartblock(bma.got.br_startblock));
+	*imap = bma.got;
+	*seq = READ_ONCE(ifp->if_seq);
+
+	if (whichfork == XFS_COW_FORK) {
+		error = xfs_refcount_alloc_cow_extent(tp, bma.blkno,
+				bma.length);
+		if (error)
+			goto out_finish;
 	}
-	if (!error)
-		xfs_bmap_validate_ret(orig_bno, orig_len, orig_flags, orig_mval,
-			orig_nmap, *nmap);
+
+	error = xfs_bmap_btree_to_extents(tp, ip, bma.cur, &bma.logflags,
+			whichfork);
+	if (error)
+		goto out_finish;
+
+	xfs_bmapi_finish(&bma, whichfork, 0);
+	error = xfs_trans_commit(tp);
+	xfs_iunlock(ip, XFS_ILOCK_EXCL);
+	return error;
+
+out_finish:
+	xfs_bmapi_finish(&bma, whichfork, error);
+out_trans_cancel:
+	xfs_trans_cancel(tp);
+	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	return error;
 }
 
@@ -4536,13 +4622,7 @@ xfs_bmapi_remap(
 	if (error)
 		goto error0;
 
-	if (xfs_bmap_wants_extents(ip, whichfork)) {
-		int		tmp_logflags = 0;
-
-		error = xfs_bmap_btree_to_extents(tp, ip, cur,
-			&tmp_logflags, whichfork);
-		logflags |= tmp_logflags;
-	}
+	error = xfs_bmap_btree_to_extents(tp, ip, cur, &logflags, whichfork);
 
 error0:
 	if (ip->i_d.di_format != XFS_DINODE_FMT_EXTENTS)
@@ -4764,8 +4844,10 @@ xfs_bmap_del_extent_delay(
 	da_diff = da_old - da_new;
 	if (!isrt)
 		da_diff += del->br_blockcount;
-	if (da_diff)
+	if (da_diff) {
 		xfs_mod_fdblocks(mp, da_diff, false);
+		xfs_mod_delalloc(mp, -da_diff);
+	}
 	return error;
 }
 
@@ -5406,24 +5488,11 @@ nodelete:
 		error = xfs_bmap_extents_to_btree(tp, ip, &cur, 0,
 				&tmp_logflags, whichfork);
 		logflags |= tmp_logflags;
-		if (error)
-			goto error0;
-	}
-	/*
-	 * transform from btree to extents, give it cur
-	 */
-	else if (xfs_bmap_wants_extents(ip, whichfork)) {
-		ASSERT(cur != NULL);
-		error = xfs_bmap_btree_to_extents(tp, ip, cur, &tmp_logflags,
+	} else {
+		error = xfs_bmap_btree_to_extents(tp, ip, cur, &logflags,
 			whichfork);
-		logflags |= tmp_logflags;
-		if (error)
-			goto error0;
 	}
-	/*
-	 * transform from extents to local?
-	 */
-	error = 0;
+
 error0:
 	/*
 	 * Log everything.  Do this after conversion, there's no point in
diff --git a/fs/xfs/libxfs/xfs_bmap.h b/fs/xfs/libxfs/xfs_bmap.h
index 09d3ea97cc15..8f597f9abdbe 100644
--- a/fs/xfs/libxfs/xfs_bmap.h
+++ b/fs/xfs/libxfs/xfs_bmap.h
@@ -95,12 +95,6 @@ struct xfs_extent_free_item
 /* Map something in the CoW fork. */
 #define XFS_BMAPI_COWFORK	0x200
 
-/* Only convert delalloc space, don't allocate entirely new extents */
-#define XFS_BMAPI_DELALLOC	0x400
-
-/* Only convert unwritten extents, don't allocate new blocks */
-#define XFS_BMAPI_CONVERT_ONLY	0x800
-
 /* Skip online discard of freed extents */
 #define XFS_BMAPI_NODISCARD	0x1000
 
@@ -117,8 +111,6 @@ struct xfs_extent_free_item
 	{ XFS_BMAPI_ZERO,	"ZERO" }, \
 	{ XFS_BMAPI_REMAP,	"REMAP" }, \
 	{ XFS_BMAPI_COWFORK,	"COWFORK" }, \
-	{ XFS_BMAPI_DELALLOC,	"DELALLOC" }, \
-	{ XFS_BMAPI_CONVERT_ONLY, "CONVERT_ONLY" }, \
 	{ XFS_BMAPI_NODISCARD,	"NODISCARD" }, \
 	{ XFS_BMAPI_NORMAP,	"NORMAP" }
 
@@ -181,7 +173,6 @@ static inline bool xfs_bmap_is_real_extent(struct xfs_bmbt_irec *irec)
 
 void	xfs_trim_extent(struct xfs_bmbt_irec *irec, xfs_fileoff_t bno,
 		xfs_filblks_t len);
-void	xfs_trim_extent_eof(struct xfs_bmbt_irec *, struct xfs_inode *);
 int	xfs_bmap_add_attrfork(struct xfs_inode *ip, int size, int rsvd);
 int	xfs_bmap_set_attrforkoff(struct xfs_inode *ip, int size, int *version);
 void	xfs_bmap_local_to_extents_empty(struct xfs_inode *ip, int whichfork);
@@ -228,6 +219,13 @@ int	xfs_bmapi_reserve_delalloc(struct xfs_inode *ip, int whichfork,
 		xfs_fileoff_t off, xfs_filblks_t len, xfs_filblks_t prealloc,
 		struct xfs_bmbt_irec *got, struct xfs_iext_cursor *cur,
 		int eof);
+int	xfs_bmapi_convert_delalloc(struct xfs_inode *ip, int whichfork,
+		xfs_fileoff_t offset_fsb, struct xfs_bmbt_irec *imap,
+		unsigned int *seq);
+int	xfs_bmap_add_extent_unwritten_real(struct xfs_trans *tp,
+		struct xfs_inode *ip, int whichfork,
+		struct xfs_iext_cursor *icur, struct xfs_btree_cur **curp,
+		struct xfs_bmbt_irec *new, int *logflagsp);
 
 static inline void
 xfs_bmap_add_free(
diff --git a/fs/xfs/libxfs/xfs_bmap_btree.c b/fs/xfs/libxfs/xfs_bmap_btree.c
index cdb74d2e2a43..fbb18ba5d905 100644
--- a/fs/xfs/libxfs/xfs_bmap_btree.c
+++ b/fs/xfs/libxfs/xfs_bmap_btree.c
@@ -11,10 +11,8 @@
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_alloc.h"
 #include "xfs_btree.h"
 #include "xfs_bmap_btree.h"
@@ -22,7 +20,6 @@
 #include "xfs_error.h"
 #include "xfs_quota.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_rmap.h"
 
 /*
@@ -411,13 +408,15 @@ static xfs_failaddr_t
 xfs_bmbt_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	xfs_failaddr_t		fa;
 	unsigned int		level;
 
-	switch (block->bb_magic) {
-	case cpu_to_be32(XFS_BMAP_CRC_MAGIC):
+	if (!xfs_verify_magic(bp, block->bb_magic))
+		return __this_address;
+
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
 		/*
 		 * XXX: need a better way of verifying the owner here. Right now
 		 * just make sure there has been one set.
@@ -425,11 +424,6 @@ xfs_bmbt_verify(
 		fa = xfs_btree_lblock_v5hdr_verify(bp, XFS_RMAP_OWN_UNKNOWN);
 		if (fa)
 			return fa;
-		/* fall through */
-	case cpu_to_be32(XFS_BMAP_MAGIC):
-		break;
-	default:
-		return __this_address;
 	}
 
 	/*
@@ -481,6 +475,8 @@ xfs_bmbt_write_verify(
 
 const struct xfs_buf_ops xfs_bmbt_buf_ops = {
 	.name = "xfs_bmbt",
+	.magic = { cpu_to_be32(XFS_BMAP_MAGIC),
+		   cpu_to_be32(XFS_BMAP_CRC_MAGIC) },
 	.verify_read = xfs_bmbt_read_verify,
 	.verify_write = xfs_bmbt_write_verify,
 	.verify_struct = xfs_bmbt_verify,
diff --git a/fs/xfs/libxfs/xfs_btree.c b/fs/xfs/libxfs/xfs_btree.c
index bbdae2b4559f..f1048efa4268 100644
--- a/fs/xfs/libxfs/xfs_btree.c
+++ b/fs/xfs/libxfs/xfs_btree.c
@@ -11,16 +11,13 @@
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_buf_item.h"
 #include "xfs_btree.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_alloc.h"
 #include "xfs_log.h"
 
@@ -276,7 +273,7 @@ xfs_btree_lblock_calc_crc(
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 
-	if (!xfs_sb_version_hascrc(&bp->b_target->bt_mount->m_sb))
+	if (!xfs_sb_version_hascrc(&bp->b_mount->m_sb))
 		return;
 	if (bip)
 		block->bb_u.l.bb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
@@ -288,7 +285,7 @@ xfs_btree_lblock_verify_crc(
 	struct xfs_buf		*bp)
 {
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
 		if (!xfs_log_check_lsn(mp, be64_to_cpu(block->bb_u.l.bb_lsn)))
@@ -314,7 +311,7 @@ xfs_btree_sblock_calc_crc(
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 
-	if (!xfs_sb_version_hascrc(&bp->b_target->bt_mount->m_sb))
+	if (!xfs_sb_version_hascrc(&bp->b_mount->m_sb))
 		return;
 	if (bip)
 		block->bb_u.s.bb_lsn = cpu_to_be64(bip->bli_item.li_lsn);
@@ -326,7 +323,7 @@ xfs_btree_sblock_verify_crc(
 	struct xfs_buf		*bp)
 {
 	struct xfs_btree_block  *block = XFS_BUF_TO_BLOCK(bp);
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
 		if (!xfs_log_check_lsn(mp, be64_to_cpu(block->bb_u.s.bb_lsn)))
@@ -691,14 +688,13 @@ xfs_buf_t *				/* buffer for fsbno */
 xfs_btree_get_bufl(
 	xfs_mount_t	*mp,		/* file system mount point */
 	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_fsblock_t	fsbno,		/* file system block number */
-	uint		lock)		/* lock flags for get_buf */
+	xfs_fsblock_t	fsbno)		/* file system block number */
 {
 	xfs_daddr_t		d;		/* real disk block address */
 
 	ASSERT(fsbno != NULLFSBLOCK);
 	d = XFS_FSB_TO_DADDR(mp, fsbno);
-	return xfs_trans_get_buf(tp, mp->m_ddev_targp, d, mp->m_bsize, lock);
+	return xfs_trans_get_buf(tp, mp->m_ddev_targp, d, mp->m_bsize, 0);
 }
 
 /*
@@ -710,15 +706,14 @@ xfs_btree_get_bufs(
 	xfs_mount_t	*mp,		/* file system mount point */
 	xfs_trans_t	*tp,		/* transaction pointer */
 	xfs_agnumber_t	agno,		/* allocation group number */
-	xfs_agblock_t	agbno,		/* allocation group block number */
-	uint		lock)		/* lock flags for get_buf */
+	xfs_agblock_t	agbno)		/* allocation group block number */
 {
 	xfs_daddr_t		d;		/* real disk block address */
 
 	ASSERT(agno != NULLAGNUMBER);
 	ASSERT(agbno != NULLAGBLOCK);
 	d = XFS_AGB_TO_DADDR(mp, agno, agbno);
-	return xfs_trans_get_buf(tp, mp->m_ddev_targp, d, mp->m_bsize, lock);
+	return xfs_trans_get_buf(tp, mp->m_ddev_targp, d, mp->m_bsize, 0);
 }
 
 /*
@@ -845,7 +840,6 @@ xfs_btree_read_bufl(
 	struct xfs_mount	*mp,		/* file system mount point */
 	struct xfs_trans	*tp,		/* transaction pointer */
 	xfs_fsblock_t		fsbno,		/* file system block number */
-	uint			lock,		/* lock flags for read_buf */
 	struct xfs_buf		**bpp,		/* buffer for fsbno */
 	int			refval,		/* ref count value for buffer */
 	const struct xfs_buf_ops *ops)
@@ -858,7 +852,7 @@ xfs_btree_read_bufl(
 		return -EFSCORRUPTED;
 	d = XFS_FSB_TO_DADDR(mp, fsbno);
 	error = xfs_trans_read_buf(mp, tp, mp->m_ddev_targp, d,
-				   mp->m_bsize, lock, &bp, ops);
+				   mp->m_bsize, 0, &bp, ops);
 	if (error)
 		return error;
 	if (bp)
@@ -1185,11 +1179,10 @@ xfs_btree_init_block(
 	xfs_btnum_t	btnum,
 	__u16		level,
 	__u16		numrecs,
-	__u64		owner,
-	unsigned int	flags)
+	__u64		owner)
 {
 	xfs_btree_init_block_int(mp, XFS_BUF_TO_BLOCK(bp), bp->b_bn,
-				 btnum, level, numrecs, owner, flags);
+				 btnum, level, numrecs, owner, 0);
 }
 
 STATIC void
@@ -1288,7 +1281,6 @@ STATIC int
 xfs_btree_get_buf_block(
 	struct xfs_btree_cur	*cur,
 	union xfs_btree_ptr	*ptr,
-	int			flags,
 	struct xfs_btree_block	**block,
 	struct xfs_buf		**bpp)
 {
@@ -1296,14 +1288,11 @@ xfs_btree_get_buf_block(
 	xfs_daddr_t		d;
 	int			error;
 
-	/* need to sort out how callers deal with failures first */
-	ASSERT(!(flags & XBF_TRYLOCK));
-
 	error = xfs_btree_ptr_to_daddr(cur, ptr, &d);
 	if (error)
 		return error;
 	*bpp = xfs_trans_get_buf(cur->bc_tp, mp->m_ddev_targp, d,
-				 mp->m_bsize, flags);
+				 mp->m_bsize, 0);
 
 	if (!*bpp)
 		return -ENOMEM;
@@ -2706,7 +2695,7 @@ __xfs_btree_split(
 	XFS_BTREE_STATS_INC(cur, alloc);
 
 	/* Set up the new block as "right". */
-	error = xfs_btree_get_buf_block(cur, &rptr, 0, &right, &rbp);
+	error = xfs_btree_get_buf_block(cur, &rptr, &right, &rbp);
 	if (error)
 		goto error0;
 
@@ -2961,7 +2950,7 @@ xfs_btree_new_iroot(
 	XFS_BTREE_STATS_INC(cur, alloc);
 
 	/* Copy the root into a real block. */
-	error = xfs_btree_get_buf_block(cur, &nptr, 0, &cblock, &cbp);
+	error = xfs_btree_get_buf_block(cur, &nptr, &cblock, &cbp);
 	if (error)
 		goto error0;
 
@@ -3058,7 +3047,7 @@ xfs_btree_new_root(
 	XFS_BTREE_STATS_INC(cur, alloc);
 
 	/* Set up the new block. */
-	error = xfs_btree_get_buf_block(cur, &lptr, 0, &new, &nbp);
+	error = xfs_btree_get_buf_block(cur, &lptr, &new, &nbp);
 	if (error)
 		goto error0;
 
@@ -4433,7 +4422,7 @@ xfs_btree_lblock_v5hdr_verify(
 	struct xfs_buf		*bp,
 	uint64_t		owner)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 
 	if (!xfs_sb_version_hascrc(&mp->m_sb))
@@ -4454,7 +4443,7 @@ xfs_btree_lblock_verify(
 	struct xfs_buf		*bp,
 	unsigned int		max_recs)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 
 	/* numrecs verification */
@@ -4484,7 +4473,7 @@ xfs_failaddr_t
 xfs_btree_sblock_v5hdr_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	struct xfs_perag	*pag = bp->b_pag;
 
@@ -4510,7 +4499,7 @@ xfs_btree_sblock_verify(
 	struct xfs_buf		*bp,
 	unsigned int		max_recs)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	xfs_agblock_t		agno;
 
diff --git a/fs/xfs/libxfs/xfs_btree.h b/fs/xfs/libxfs/xfs_btree.h
index e3b3e9dce5da..fa3cd8ab9aba 100644
--- a/fs/xfs/libxfs/xfs_btree.h
+++ b/fs/xfs/libxfs/xfs_btree.h
@@ -301,8 +301,7 @@ struct xfs_buf *				/* buffer for fsbno */
 xfs_btree_get_bufl(
 	struct xfs_mount	*mp,	/* file system mount point */
 	struct xfs_trans	*tp,	/* transaction pointer */
-	xfs_fsblock_t		fsbno,	/* file system block number */
-	uint			lock);	/* lock flags for get_buf */
+	xfs_fsblock_t		fsbno);	/* file system block number */
 
 /*
  * Get a buffer for the block, return it with no data read.
@@ -313,8 +312,7 @@ xfs_btree_get_bufs(
 	struct xfs_mount	*mp,	/* file system mount point */
 	struct xfs_trans	*tp,	/* transaction pointer */
 	xfs_agnumber_t		agno,	/* allocation group number */
-	xfs_agblock_t		agbno,	/* allocation group block number */
-	uint			lock);	/* lock flags for get_buf */
+	xfs_agblock_t		agbno);	/* allocation group block number */
 
 /*
  * Check for the cursor referring to the last block at the given level.
@@ -345,7 +343,6 @@ xfs_btree_read_bufl(
 	struct xfs_mount	*mp,	/* file system mount point */
 	struct xfs_trans	*tp,	/* transaction pointer */
 	xfs_fsblock_t		fsbno,	/* file system block number */
-	uint			lock,	/* lock flags for read_buf */
 	struct xfs_buf		**bpp,	/* buffer for fsbno */
 	int			refval,	/* ref count value for buffer */
 	const struct xfs_buf_ops *ops);
@@ -383,8 +380,7 @@ xfs_btree_init_block(
 	xfs_btnum_t	btnum,
 	__u16		level,
 	__u16		numrecs,
-	__u64		owner,
-	unsigned int	flags);
+	__u64		owner);
 
 void
 xfs_btree_init_block_int(
@@ -469,8 +465,8 @@ uint xfs_btree_compute_maxlevels(uint *limits, unsigned long len);
 unsigned long long xfs_btree_calc_size(uint *limits, unsigned long long len);
 
 /* return codes */
-#define XFS_BTREE_QUERY_RANGE_CONTINUE	0	/* keep iterating */
-#define XFS_BTREE_QUERY_RANGE_ABORT	1	/* stop iterating */
+#define XFS_BTREE_QUERY_RANGE_CONTINUE	(XFS_ITER_CONTINUE) /* keep iterating */
+#define XFS_BTREE_QUERY_RANGE_ABORT	(XFS_ITER_ABORT)    /* stop iterating */
 typedef int (*xfs_btree_query_range_fn)(struct xfs_btree_cur *cur,
 		union xfs_btree_rec *rec, void *priv);
 
diff --git a/fs/xfs/libxfs/xfs_da_btree.c b/fs/xfs/libxfs/xfs_da_btree.c
index 376bee94b5dd..d1c77fd0815d 100644
--- a/fs/xfs/libxfs/xfs_da_btree.c
+++ b/fs/xfs/libxfs/xfs_da_btree.c
@@ -12,20 +12,14 @@
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_dir2.h"
 #include "xfs_dir2_priv.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
-#include "xfs_alloc.h"
 #include "xfs_bmap.h"
-#include "xfs_attr.h"
 #include "xfs_attr_leaf.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_buf_item.h"
 #include "xfs_log.h"
 
@@ -116,35 +110,52 @@ xfs_da_state_free(xfs_da_state_t *state)
 	kmem_zone_free(xfs_da_state_zone, state);
 }
 
+/*
+ * Verify an xfs_da3_blkinfo structure. Note that the da3 fields are only
+ * accessible on v5 filesystems. This header format is common across da node,
+ * attr leaf and dir leaf blocks.
+ */
+xfs_failaddr_t
+xfs_da3_blkinfo_verify(
+	struct xfs_buf		*bp,
+	struct xfs_da3_blkinfo	*hdr3)
+{
+	struct xfs_mount	*mp = bp->b_mount;
+	struct xfs_da_blkinfo	*hdr = &hdr3->hdr;
+
+	if (!xfs_verify_magic16(bp, hdr->magic))
+		return __this_address;
+
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
+			return __this_address;
+		if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
+			return __this_address;
+		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
+			return __this_address;
+	}
+
+	return NULL;
+}
+
 static xfs_failaddr_t
 xfs_da3_node_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_da_intnode	*hdr = bp->b_addr;
 	struct xfs_da3_icnode_hdr ichdr;
 	const struct xfs_dir_ops *ops;
+	xfs_failaddr_t		fa;
 
 	ops = xfs_dir_get_ops(mp, NULL);
 
 	ops->node_hdr_from_disk(&ichdr, hdr);
 
-	if (xfs_sb_version_hascrc(&mp->m_sb)) {
-		struct xfs_da3_node_hdr *hdr3 = bp->b_addr;
-
-		if (ichdr.magic != XFS_DA3_NODE_MAGIC)
-			return __this_address;
+	fa = xfs_da3_blkinfo_verify(bp, bp->b_addr);
+	if (fa)
+		return fa;
 
-		if (!uuid_equal(&hdr3->info.uuid, &mp->m_sb.sb_meta_uuid))
-			return __this_address;
-		if (be64_to_cpu(hdr3->info.blkno) != bp->b_bn)
-			return __this_address;
-		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->info.lsn)))
-			return __this_address;
-	} else {
-		if (ichdr.magic != XFS_DA_NODE_MAGIC)
-			return __this_address;
-	}
 	if (ichdr.level == 0)
 		return __this_address;
 	if (ichdr.level > XFS_DA_NODE_MAXDEPTH)
@@ -169,7 +180,7 @@ static void
 xfs_da3_node_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	struct xfs_da3_node_hdr *hdr3 = bp->b_addr;
 	xfs_failaddr_t		fa;
@@ -257,6 +268,8 @@ xfs_da3_node_verify_struct(
 
 const struct xfs_buf_ops xfs_da3_node_buf_ops = {
 	.name = "xfs_da3_node",
+	.magic16 = { cpu_to_be16(XFS_DA_NODE_MAGIC),
+		     cpu_to_be16(XFS_DA3_NODE_MAGIC) },
 	.verify_read = xfs_da3_node_read_verify,
 	.verify_write = xfs_da3_node_write_verify,
 	.verify_struct = xfs_da3_node_verify_struct,
diff --git a/fs/xfs/libxfs/xfs_da_format.c b/fs/xfs/libxfs/xfs_da_format.c
index b39053dcb643..b1ae572496b6 100644
--- a/fs/xfs/libxfs/xfs_da_format.c
+++ b/fs/xfs/libxfs/xfs_da_format.c
@@ -11,11 +11,8 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_dir2.h"
-#include "xfs_dir2_priv.h"
 
 /*
  * Shortform directory ops
diff --git a/fs/xfs/libxfs/xfs_da_format.h b/fs/xfs/libxfs/xfs_da_format.h
index 5d5bf3bffc78..ae654e06b2fb 100644
--- a/fs/xfs/libxfs/xfs_da_format.h
+++ b/fs/xfs/libxfs/xfs_da_format.h
@@ -869,4 +869,7 @@ static inline unsigned int xfs_dir2_dirblock_bytes(struct xfs_sb *sbp)
 	return 1 << (sbp->sb_blocklog + sbp->sb_dirblklog);
 }
 
+xfs_failaddr_t xfs_da3_blkinfo_verify(struct xfs_buf *bp,
+				      struct xfs_da3_blkinfo *hdr3);
+
 #endif /* __XFS_DA_FORMAT_H__ */
diff --git a/fs/xfs/libxfs/xfs_defer.c b/fs/xfs/libxfs/xfs_defer.c
index 94f00427de98..eb2be2a6a25a 100644
--- a/fs/xfs/libxfs/xfs_defer.c
+++ b/fs/xfs/libxfs/xfs_defer.c
@@ -9,8 +9,6 @@
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_bit.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
 #include "xfs_trans.h"
@@ -274,13 +272,15 @@ xfs_defer_trans_roll(
 
 	trace_xfs_defer_trans_roll(tp, _RET_IP_);
 
-	/* Roll the transaction. */
+	/*
+	 * Roll the transaction.  Rolling always given a new transaction (even
+	 * if committing the old one fails!) to hand back to the caller, so we
+	 * join the held resources to the new transaction so that we always
+	 * return with the held resources joined to @tpp, no matter what
+	 * happened.
+	 */
 	error = xfs_trans_roll(tpp);
 	tp = *tpp;
-	if (error) {
-		trace_xfs_defer_trans_roll_error(tp, error);
-		return error;
-	}
 
 	/* Rejoin the joined inodes. */
 	for (i = 0; i < ipcount; i++)
@@ -292,6 +292,8 @@ xfs_defer_trans_roll(
 		xfs_trans_bhold(tp, bplist[i]);
 	}
 
+	if (error)
+		trace_xfs_defer_trans_roll_error(tp, error);
 	return error;
 }
 
diff --git a/fs/xfs/libxfs/xfs_dir2.c b/fs/xfs/libxfs/xfs_dir2.c
index 229152cd1a24..67840723edbb 100644
--- a/fs/xfs/libxfs/xfs_dir2.c
+++ b/fs/xfs/libxfs/xfs_dir2.c
@@ -5,20 +5,16 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_bmap.h"
 #include "xfs_dir2.h"
 #include "xfs_dir2_priv.h"
-#include "xfs_ialloc.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
@@ -703,3 +699,20 @@ xfs_dir2_shrink_inode(
 	xfs_trans_log_inode(tp, dp, XFS_ILOG_CORE);
 	return 0;
 }
+
+/* Returns true if the directory entry name is valid. */
+bool
+xfs_dir2_namecheck(
+	const void	*name,
+	size_t		length)
+{
+	/*
+	 * MAXNAMELEN includes the trailing null, but (name/length) leave it
+	 * out, so use >= for the length check.
+	 */
+	if (length >= MAXNAMELEN)
+		return false;
+
+	/* There shouldn't be any slashes or nulls here */
+	return !memchr(name, '/', length) && !memchr(name, 0, length);
+}
diff --git a/fs/xfs/libxfs/xfs_dir2.h b/fs/xfs/libxfs/xfs_dir2.h
index c3e3f6b813d8..f54244779492 100644
--- a/fs/xfs/libxfs/xfs_dir2.h
+++ b/fs/xfs/libxfs/xfs_dir2.h
@@ -326,5 +326,6 @@ xfs_dir2_leaf_tail_p(struct xfs_da_geometry *geo, struct xfs_dir2_leaf *lp)
 unsigned char xfs_dir3_get_dtype(struct xfs_mount *mp, uint8_t filetype);
 void *xfs_dir3_data_endp(struct xfs_da_geometry *geo,
 		struct xfs_dir2_data_hdr *hdr);
+bool xfs_dir2_namecheck(const void *name, size_t length);
 
 #endif	/* __XFS_DIR2_H__ */
diff --git a/fs/xfs/libxfs/xfs_dir2_block.c b/fs/xfs/libxfs/xfs_dir2_block.c
index 30ed5919da72..a6fb0cc2085e 100644
--- a/fs/xfs/libxfs/xfs_dir2_block.c
+++ b/fs/xfs/libxfs/xfs_dir2_block.c
@@ -6,22 +6,19 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_bmap.h"
 #include "xfs_buf_item.h"
 #include "xfs_dir2.h"
 #include "xfs_dir2_priv.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_log.h"
 
 /*
@@ -50,21 +47,19 @@ static xfs_failaddr_t
 xfs_dir3_block_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 
+	if (!xfs_verify_magic(bp, hdr3->magic))
+		return __this_address;
+
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
-		if (hdr3->magic != cpu_to_be32(XFS_DIR3_BLOCK_MAGIC))
-			return __this_address;
 		if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
 			return __this_address;
 		if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
 			return __this_address;
 		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
 			return __this_address;
-	} else {
-		if (hdr3->magic != cpu_to_be32(XFS_DIR2_BLOCK_MAGIC))
-			return __this_address;
 	}
 	return __xfs_dir3_data_check(NULL, bp);
 }
@@ -73,7 +68,7 @@ static void
 xfs_dir3_block_read_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	xfs_failaddr_t		fa;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
@@ -90,7 +85,7 @@ static void
 xfs_dir3_block_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 	xfs_failaddr_t		fa;
@@ -112,6 +107,8 @@ xfs_dir3_block_write_verify(
 
 const struct xfs_buf_ops xfs_dir3_block_buf_ops = {
 	.name = "xfs_dir3_block",
+	.magic = { cpu_to_be32(XFS_DIR2_BLOCK_MAGIC),
+		   cpu_to_be32(XFS_DIR3_BLOCK_MAGIC) },
 	.verify_read = xfs_dir3_block_read_verify,
 	.verify_write = xfs_dir3_block_write_verify,
 	.verify_struct = xfs_dir3_block_verify,
diff --git a/fs/xfs/libxfs/xfs_dir2_data.c b/fs/xfs/libxfs/xfs_dir2_data.c
index 01162c62ec8f..2c79be4c3153 100644
--- a/fs/xfs/libxfs/xfs_dir2_data.c
+++ b/fs/xfs/libxfs/xfs_dir2_data.c
@@ -6,19 +6,16 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_dir2.h"
-#include "xfs_dir2_priv.h"
 #include "xfs_error.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
-#include "xfs_cksum.h"
 #include "xfs_log.h"
 
 static xfs_failaddr_t xfs_dir2_data_freefind_verify(
@@ -50,14 +47,13 @@ __xfs_dir3_data_check(
 	int			i;		/* leaf index */
 	int			lastfree;	/* last entry was unused */
 	xfs_dir2_leaf_entry_t	*lep=NULL;	/* block leaf entries */
-	xfs_mount_t		*mp;		/* filesystem mount point */
+	struct xfs_mount	*mp = bp->b_mount;
 	char			*p;		/* current data position */
 	int			stale;		/* count of stale leaves */
 	struct xfs_name		name;
 	const struct xfs_dir_ops *ops;
 	struct xfs_da_geometry	*geo;
 
-	mp = bp->b_target->bt_mount;
 	geo = mp->m_dir_geo;
 
 	/*
@@ -249,21 +245,19 @@ static xfs_failaddr_t
 xfs_dir3_data_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 
+	if (!xfs_verify_magic(bp, hdr3->magic))
+		return __this_address;
+
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
-		if (hdr3->magic != cpu_to_be32(XFS_DIR3_DATA_MAGIC))
-			return __this_address;
 		if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
 			return __this_address;
 		if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
 			return __this_address;
 		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
 			return __this_address;
-	} else {
-		if (hdr3->magic != cpu_to_be32(XFS_DIR2_DATA_MAGIC))
-			return __this_address;
 	}
 	return __xfs_dir3_data_check(NULL, bp);
 }
@@ -300,7 +294,7 @@ static void
 xfs_dir3_data_read_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	xfs_failaddr_t		fa;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
@@ -317,7 +311,7 @@ static void
 xfs_dir3_data_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 	xfs_failaddr_t		fa;
@@ -339,6 +333,8 @@ xfs_dir3_data_write_verify(
 
 const struct xfs_buf_ops xfs_dir3_data_buf_ops = {
 	.name = "xfs_dir3_data",
+	.magic = { cpu_to_be32(XFS_DIR2_DATA_MAGIC),
+		   cpu_to_be32(XFS_DIR3_DATA_MAGIC) },
 	.verify_read = xfs_dir3_data_read_verify,
 	.verify_write = xfs_dir3_data_write_verify,
 	.verify_struct = xfs_dir3_data_verify,
@@ -346,6 +342,8 @@ const struct xfs_buf_ops xfs_dir3_data_buf_ops = {
 
 static const struct xfs_buf_ops xfs_dir3_data_reada_buf_ops = {
 	.name = "xfs_dir3_data_reada",
+	.magic = { cpu_to_be32(XFS_DIR2_DATA_MAGIC),
+		   cpu_to_be32(XFS_DIR3_DATA_MAGIC) },
 	.verify_read = xfs_dir3_data_reada_verify,
 	.verify_write = xfs_dir3_data_write_verify,
 };
diff --git a/fs/xfs/libxfs/xfs_dir2_leaf.c b/fs/xfs/libxfs/xfs_dir2_leaf.c
index 1728a3e6f5cf..a53e4585a2f3 100644
--- a/fs/xfs/libxfs/xfs_dir2_leaf.c
+++ b/fs/xfs/libxfs/xfs_dir2_leaf.c
@@ -6,12 +6,11 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_bmap.h"
 #include "xfs_dir2.h"
@@ -20,8 +19,6 @@
 #include "xfs_trace.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
-#include "xfs_cksum.h"
-#include "xfs_log.h"
 
 /*
  * Local function declarations.
@@ -142,66 +139,46 @@ xfs_dir3_leaf_check_int(
  */
 static xfs_failaddr_t
 xfs_dir3_leaf_verify(
-	struct xfs_buf		*bp,
-	uint16_t		magic)
+	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_dir2_leaf	*leaf = bp->b_addr;
+	xfs_failaddr_t		fa;
 
-	ASSERT(magic == XFS_DIR2_LEAF1_MAGIC || magic == XFS_DIR2_LEAFN_MAGIC);
-
-	if (xfs_sb_version_hascrc(&mp->m_sb)) {
-		struct xfs_dir3_leaf_hdr *leaf3 = bp->b_addr;
-		uint16_t		magic3;
-
-		magic3 = (magic == XFS_DIR2_LEAF1_MAGIC) ? XFS_DIR3_LEAF1_MAGIC
-							 : XFS_DIR3_LEAFN_MAGIC;
-
-		if (leaf3->info.hdr.magic != cpu_to_be16(magic3))
-			return __this_address;
-		if (!uuid_equal(&leaf3->info.uuid, &mp->m_sb.sb_meta_uuid))
-			return __this_address;
-		if (be64_to_cpu(leaf3->info.blkno) != bp->b_bn)
-			return __this_address;
-		if (!xfs_log_check_lsn(mp, be64_to_cpu(leaf3->info.lsn)))
-			return __this_address;
-	} else {
-		if (leaf->hdr.info.magic != cpu_to_be16(magic))
-			return __this_address;
-	}
+	fa = xfs_da3_blkinfo_verify(bp, bp->b_addr);
+	if (fa)
+		return fa;
 
 	return xfs_dir3_leaf_check_int(mp, NULL, NULL, leaf);
 }
 
 static void
-__read_verify(
-	struct xfs_buf  *bp,
-	uint16_t	magic)
+xfs_dir3_leaf_read_verify(
+	struct xfs_buf  *bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	xfs_failaddr_t		fa;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
 	     !xfs_buf_verify_cksum(bp, XFS_DIR3_LEAF_CRC_OFF))
 		xfs_verifier_error(bp, -EFSBADCRC, __this_address);
 	else {
-		fa = xfs_dir3_leaf_verify(bp, magic);
+		fa = xfs_dir3_leaf_verify(bp);
 		if (fa)
 			xfs_verifier_error(bp, -EFSCORRUPTED, fa);
 	}
 }
 
 static void
-__write_verify(
-	struct xfs_buf  *bp,
-	uint16_t	magic)
+xfs_dir3_leaf_write_verify(
+	struct xfs_buf  *bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	struct xfs_dir3_leaf_hdr *hdr3 = bp->b_addr;
 	xfs_failaddr_t		fa;
 
-	fa = xfs_dir3_leaf_verify(bp, magic);
+	fa = xfs_dir3_leaf_verify(bp);
 	if (fa) {
 		xfs_verifier_error(bp, -EFSCORRUPTED, fa);
 		return;
@@ -216,60 +193,22 @@ __write_verify(
 	xfs_buf_update_cksum(bp, XFS_DIR3_LEAF_CRC_OFF);
 }
 
-static xfs_failaddr_t
-xfs_dir3_leaf1_verify(
-	struct xfs_buf	*bp)
-{
-	return xfs_dir3_leaf_verify(bp, XFS_DIR2_LEAF1_MAGIC);
-}
-
-static void
-xfs_dir3_leaf1_read_verify(
-	struct xfs_buf	*bp)
-{
-	__read_verify(bp, XFS_DIR2_LEAF1_MAGIC);
-}
-
-static void
-xfs_dir3_leaf1_write_verify(
-	struct xfs_buf	*bp)
-{
-	__write_verify(bp, XFS_DIR2_LEAF1_MAGIC);
-}
-
-static xfs_failaddr_t
-xfs_dir3_leafn_verify(
-	struct xfs_buf	*bp)
-{
-	return xfs_dir3_leaf_verify(bp, XFS_DIR2_LEAFN_MAGIC);
-}
-
-static void
-xfs_dir3_leafn_read_verify(
-	struct xfs_buf	*bp)
-{
-	__read_verify(bp, XFS_DIR2_LEAFN_MAGIC);
-}
-
-static void
-xfs_dir3_leafn_write_verify(
-	struct xfs_buf	*bp)
-{
-	__write_verify(bp, XFS_DIR2_LEAFN_MAGIC);
-}
-
 const struct xfs_buf_ops xfs_dir3_leaf1_buf_ops = {
 	.name = "xfs_dir3_leaf1",
-	.verify_read = xfs_dir3_leaf1_read_verify,
-	.verify_write = xfs_dir3_leaf1_write_verify,
-	.verify_struct = xfs_dir3_leaf1_verify,
+	.magic16 = { cpu_to_be16(XFS_DIR2_LEAF1_MAGIC),
+		     cpu_to_be16(XFS_DIR3_LEAF1_MAGIC) },
+	.verify_read = xfs_dir3_leaf_read_verify,
+	.verify_write = xfs_dir3_leaf_write_verify,
+	.verify_struct = xfs_dir3_leaf_verify,
 };
 
 const struct xfs_buf_ops xfs_dir3_leafn_buf_ops = {
 	.name = "xfs_dir3_leafn",
-	.verify_read = xfs_dir3_leafn_read_verify,
-	.verify_write = xfs_dir3_leafn_write_verify,
-	.verify_struct = xfs_dir3_leafn_verify,
+	.magic16 = { cpu_to_be16(XFS_DIR2_LEAFN_MAGIC),
+		     cpu_to_be16(XFS_DIR3_LEAFN_MAGIC) },
+	.verify_read = xfs_dir3_leaf_read_verify,
+	.verify_write = xfs_dir3_leaf_write_verify,
+	.verify_struct = xfs_dir3_leaf_verify,
 };
 
 int
@@ -621,43 +560,40 @@ xfs_dir3_leaf_find_entry(
  */
 int						/* error */
 xfs_dir2_leaf_addname(
-	xfs_da_args_t		*args)		/* operation arguments */
+	struct xfs_da_args	*args)		/* operation arguments */
 {
+	struct xfs_dir3_icleaf_hdr leafhdr;
+	struct xfs_trans	*tp = args->trans;
 	__be16			*bestsp;	/* freespace table in leaf */
-	int			compact;	/* need to compact leaves */
-	xfs_dir2_data_hdr_t	*hdr;		/* data block header */
+	__be16			*tagp;		/* end of data entry */
 	struct xfs_buf		*dbp;		/* data block buffer */
-	xfs_dir2_data_entry_t	*dep;		/* data block entry */
-	xfs_inode_t		*dp;		/* incore directory inode */
-	xfs_dir2_data_unused_t	*dup;		/* data unused entry */
+	struct xfs_buf		*lbp;		/* leaf's buffer */
+	struct xfs_dir2_leaf	*leaf;		/* leaf structure */
+	struct xfs_inode	*dp = args->dp;	/* incore directory inode */
+	struct xfs_dir2_data_hdr *hdr;		/* data block header */
+	struct xfs_dir2_data_entry *dep;	/* data block entry */
+	struct xfs_dir2_leaf_entry *lep;	/* leaf entry table pointer */
+	struct xfs_dir2_leaf_entry *ents;
+	struct xfs_dir2_data_unused *dup;	/* data unused entry */
+	struct xfs_dir2_leaf_tail *ltp;		/* leaf tail pointer */
+	struct xfs_dir2_data_free *bf;		/* bestfree table */
+	int			compact;	/* need to compact leaves */
 	int			error;		/* error return value */
 	int			grown;		/* allocated new data block */
-	int			highstale;	/* index of next stale leaf */
+	int			highstale = 0;	/* index of next stale leaf */
 	int			i;		/* temporary, index */
 	int			index;		/* leaf table position */
-	struct xfs_buf		*lbp;		/* leaf's buffer */
-	xfs_dir2_leaf_t		*leaf;		/* leaf structure */
 	int			length;		/* length of new entry */
-	xfs_dir2_leaf_entry_t	*lep;		/* leaf entry table pointer */
 	int			lfloglow;	/* low leaf logging index */
 	int			lfloghigh;	/* high leaf logging index */
-	int			lowstale;	/* index of prev stale leaf */
-	xfs_dir2_leaf_tail_t	*ltp;		/* leaf tail pointer */
+	int			lowstale = 0;	/* index of prev stale leaf */
 	int			needbytes;	/* leaf block bytes needed */
 	int			needlog;	/* need to log data header */
 	int			needscan;	/* need to rescan data free */
-	__be16			*tagp;		/* end of data entry */
-	xfs_trans_t		*tp;		/* transaction pointer */
 	xfs_dir2_db_t		use_block;	/* data block number */
-	struct xfs_dir2_data_free *bf;		/* bestfree table */
-	struct xfs_dir2_leaf_entry *ents;
-	struct xfs_dir3_icleaf_hdr leafhdr;
 
 	trace_xfs_dir2_leaf_addname(args);
 
-	dp = args->dp;
-	tp = args->trans;
-
 	error = xfs_dir3_leaf_read(tp, dp, args->geo->leafblk, -1, &lbp);
 	if (error)
 		return error;
diff --git a/fs/xfs/libxfs/xfs_dir2_node.c b/fs/xfs/libxfs/xfs_dir2_node.c
index f1bb3434f51c..afcc6642690a 100644
--- a/fs/xfs/libxfs/xfs_dir2_node.c
+++ b/fs/xfs/libxfs/xfs_dir2_node.c
@@ -6,12 +6,11 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_bmap.h"
 #include "xfs_dir2.h"
@@ -20,7 +19,6 @@
 #include "xfs_trace.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
-#include "xfs_cksum.h"
 #include "xfs_log.h"
 
 /*
@@ -84,23 +82,21 @@ static xfs_failaddr_t
 xfs_dir3_free_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_dir2_free_hdr *hdr = bp->b_addr;
 
+	if (!xfs_verify_magic(bp, hdr->magic))
+		return __this_address;
+
 	if (xfs_sb_version_hascrc(&mp->m_sb)) {
 		struct xfs_dir3_blk_hdr *hdr3 = bp->b_addr;
 
-		if (hdr3->magic != cpu_to_be32(XFS_DIR3_FREE_MAGIC))
-			return __this_address;
 		if (!uuid_equal(&hdr3->uuid, &mp->m_sb.sb_meta_uuid))
 			return __this_address;
 		if (be64_to_cpu(hdr3->blkno) != bp->b_bn)
 			return __this_address;
 		if (!xfs_log_check_lsn(mp, be64_to_cpu(hdr3->lsn)))
 			return __this_address;
-	} else {
-		if (hdr->magic != cpu_to_be32(XFS_DIR2_FREE_MAGIC))
-			return __this_address;
 	}
 
 	/* XXX: should bounds check the xfs_dir3_icfree_hdr here */
@@ -112,7 +108,7 @@ static void
 xfs_dir3_free_read_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	xfs_failaddr_t		fa;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
@@ -129,7 +125,7 @@ static void
 xfs_dir3_free_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	struct xfs_dir3_blk_hdr	*hdr3 = bp->b_addr;
 	xfs_failaddr_t		fa;
@@ -151,6 +147,8 @@ xfs_dir3_free_write_verify(
 
 const struct xfs_buf_ops xfs_dir3_free_buf_ops = {
 	.name = "xfs_dir3_free",
+	.magic = { cpu_to_be32(XFS_DIR2_FREE_MAGIC),
+		   cpu_to_be32(XFS_DIR3_FREE_MAGIC) },
 	.verify_read = xfs_dir3_free_read_verify,
 	.verify_write = xfs_dir3_free_write_verify,
 	.verify_struct = xfs_dir3_free_verify,
@@ -426,24 +424,22 @@ xfs_dir2_leaf_to_node(
 static int					/* error */
 xfs_dir2_leafn_add(
 	struct xfs_buf		*bp,		/* leaf buffer */
-	xfs_da_args_t		*args,		/* operation arguments */
+	struct xfs_da_args	*args,		/* operation arguments */
 	int			index)		/* insertion pt for new entry */
 {
+	struct xfs_dir3_icleaf_hdr leafhdr;
+	struct xfs_inode	*dp = args->dp;
+	struct xfs_dir2_leaf	*leaf = bp->b_addr;
+	struct xfs_dir2_leaf_entry *lep;
+	struct xfs_dir2_leaf_entry *ents;
 	int			compact;	/* compacting stale leaves */
-	xfs_inode_t		*dp;		/* incore directory inode */
-	int			highstale;	/* next stale entry */
-	xfs_dir2_leaf_t		*leaf;		/* leaf structure */
-	xfs_dir2_leaf_entry_t	*lep;		/* leaf entry */
+	int			highstale = 0;	/* next stale entry */
 	int			lfloghigh;	/* high leaf entry logging */
 	int			lfloglow;	/* low leaf entry logging */
-	int			lowstale;	/* previous stale entry */
-	struct xfs_dir3_icleaf_hdr leafhdr;
-	struct xfs_dir2_leaf_entry *ents;
+	int			lowstale = 0;	/* previous stale entry */
 
 	trace_xfs_dir2_leafn_add(args, index);
 
-	dp = args->dp;
-	leaf = bp->b_addr;
 	dp->d_ops->leaf_hdr_from_disk(&leafhdr, leaf);
 	ents = dp->d_ops->leaf_ents_p(leaf);
 
diff --git a/fs/xfs/libxfs/xfs_dir2_sf.c b/fs/xfs/libxfs/xfs_dir2_sf.c
index 585dfdb7b6b6..033589257f54 100644
--- a/fs/xfs/libxfs/xfs_dir2_sf.c
+++ b/fs/xfs/libxfs/xfs_dir2_sf.c
@@ -5,16 +5,13 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
-#include "xfs_error.h"
 #include "xfs_dir2.h"
 #include "xfs_dir2_priv.h"
 #include "xfs_trace.h"
diff --git a/fs/xfs/libxfs/xfs_dquot_buf.c b/fs/xfs/libxfs/xfs_dquot_buf.c
index d293f371dd54..e8bd688a4073 100644
--- a/fs/xfs/libxfs/xfs_dquot_buf.c
+++ b/fs/xfs/libxfs/xfs_dquot_buf.c
@@ -16,8 +16,6 @@
 #include "xfs_trans.h"
 #include "xfs_qm.h"
 #include "xfs_error.h"
-#include "xfs_cksum.h"
-#include "xfs_trace.h"
 
 int
 xfs_calc_dquots_per_chunk(
@@ -110,7 +108,7 @@ xfs_dqblk_verify(
 /*
  * Do some primitive error checking on ondisk dquot data structures.
  */
-int
+void
 xfs_dqblk_repair(
 	struct xfs_mount	*mp,
 	struct xfs_dqblk	*dqb,
@@ -133,8 +131,6 @@ xfs_dqblk_repair(
 		xfs_update_cksum((char *)dqb, sizeof(struct xfs_dqblk),
 				 XFS_DQUOT_CRC_OFF);
 	}
-
-	return 0;
 }
 
 STATIC bool
@@ -226,7 +222,7 @@ static xfs_failaddr_t
 xfs_dquot_buf_verify_struct(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 
 	return xfs_dquot_buf_verify(mp, bp, false);
 }
@@ -235,7 +231,7 @@ static void
 xfs_dquot_buf_read_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 
 	if (!xfs_dquot_buf_verify_crc(mp, bp, false))
 		return;
@@ -252,7 +248,7 @@ static void
 xfs_dquot_buf_readahead_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 
 	if (!xfs_dquot_buf_verify_crc(mp, bp, true) ||
 	    xfs_dquot_buf_verify(mp, bp, true) != NULL) {
@@ -270,13 +266,15 @@ static void
 xfs_dquot_buf_write_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 
 	xfs_dquot_buf_verify(mp, bp, false);
 }
 
 const struct xfs_buf_ops xfs_dquot_buf_ops = {
 	.name = "xfs_dquot",
+	.magic16 = { cpu_to_be16(XFS_DQUOT_MAGIC),
+		     cpu_to_be16(XFS_DQUOT_MAGIC) },
 	.verify_read = xfs_dquot_buf_read_verify,
 	.verify_write = xfs_dquot_buf_write_verify,
 	.verify_struct = xfs_dquot_buf_verify_struct,
@@ -284,6 +282,8 @@ const struct xfs_buf_ops xfs_dquot_buf_ops = {
 
 const struct xfs_buf_ops xfs_dquot_buf_ra_ops = {
 	.name = "xfs_dquot_ra",
+	.magic16 = { cpu_to_be16(XFS_DQUOT_MAGIC),
+		     cpu_to_be16(XFS_DQUOT_MAGIC) },
 	.verify_read = xfs_dquot_buf_readahead_verify,
 	.verify_write = xfs_dquot_buf_write_verify,
 };
diff --git a/fs/xfs/libxfs/xfs_errortag.h b/fs/xfs/libxfs/xfs_errortag.h
index 66077a105cbb..79e6c4fb1d8a 100644
--- a/fs/xfs/libxfs/xfs_errortag.h
+++ b/fs/xfs/libxfs/xfs_errortag.h
@@ -54,7 +54,8 @@
 #define XFS_ERRTAG_BUF_LRU_REF				31
 #define XFS_ERRTAG_FORCE_SCRUB_REPAIR			32
 #define XFS_ERRTAG_FORCE_SUMMARY_RECALC			33
-#define XFS_ERRTAG_MAX					34
+#define XFS_ERRTAG_IUNLINK_FALLBACK			34
+#define XFS_ERRTAG_MAX					35
 
 /*
  * Random factors for above tags, 1 means always, 2 means 1/2 time, etc.
@@ -93,5 +94,6 @@
 #define XFS_RANDOM_BUF_LRU_REF				2
 #define XFS_RANDOM_FORCE_SCRUB_REPAIR			1
 #define XFS_RANDOM_FORCE_SUMMARY_RECALC			1
+#define XFS_RANDOM_IUNLINK_FALLBACK			(XFS_RANDOM_DEFAULT/10)
 
 #endif /* __XFS_ERRORTAG_H_ */
diff --git a/fs/xfs/libxfs/xfs_format.h b/fs/xfs/libxfs/xfs_format.h
index 9bb3c48843ec..c968b60cee15 100644
--- a/fs/xfs/libxfs/xfs_format.h
+++ b/fs/xfs/libxfs/xfs_format.h
@@ -1071,7 +1071,7 @@ static inline void xfs_dinode_put_rdev(struct xfs_dinode *dip, xfs_dev_t rdev)
 #define	XFS_INO_MASK(k)			(uint32_t)((1ULL << (k)) - 1)
 #define	XFS_INO_OFFSET_BITS(mp)		(mp)->m_sb.sb_inopblog
 #define	XFS_INO_AGBNO_BITS(mp)		(mp)->m_sb.sb_agblklog
-#define	XFS_INO_AGINO_BITS(mp)		(mp)->m_agino_log
+#define	XFS_INO_AGINO_BITS(mp)		((mp)->m_ino_geo.agino_log)
 #define	XFS_INO_AGNO_BITS(mp)		(mp)->m_agno_log
 #define	XFS_INO_BITS(mp)		\
 	XFS_INO_AGNO_BITS(mp) + XFS_INO_AGINO_BITS(mp)
diff --git a/fs/xfs/libxfs/xfs_fs.h b/fs/xfs/libxfs/xfs_fs.h
index f3aa59302fef..52d03a3a02a4 100644
--- a/fs/xfs/libxfs/xfs_fs.h
+++ b/fs/xfs/libxfs/xfs_fs.h
@@ -97,7 +97,7 @@ struct getbmapx {
  * For use by backup and restore programs to set the XFS on-disk inode
  * fields di_dmevmask and di_dmstate.  These must be set to exactly and
  * only values previously obtained via xfs_bulkstat!  (Specifically the
- * xfs_bstat_t fields bs_dmevmask and bs_dmstate.)
+ * struct xfs_bstat fields bs_dmevmask and bs_dmstate.)
  */
 #ifndef HAVE_FSDMIDATA
 struct fsdmidata {
@@ -124,7 +124,7 @@ typedef struct xfs_flock64 {
 /*
  * Output for XFS_IOC_FSGEOMETRY_V1
  */
-typedef struct xfs_fsop_geom_v1 {
+struct xfs_fsop_geom_v1 {
 	__u32		blocksize;	/* filesystem (data) block size */
 	__u32		rtextsize;	/* realtime extent size		*/
 	__u32		agblocks;	/* fsblocks in an AG		*/
@@ -145,12 +145,39 @@ typedef struct xfs_fsop_geom_v1 {
 	__u32		logsectsize;	/* log sector size, bytes	*/
 	__u32		rtsectsize;	/* realtime sector size, bytes	*/
 	__u32		dirblocksize;	/* directory block size, bytes	*/
-} xfs_fsop_geom_v1_t;
+};
+
+/*
+ * Output for XFS_IOC_FSGEOMETRY_V4
+ */
+struct xfs_fsop_geom_v4 {
+	__u32		blocksize;	/* filesystem (data) block size */
+	__u32		rtextsize;	/* realtime extent size		*/
+	__u32		agblocks;	/* fsblocks in an AG		*/
+	__u32		agcount;	/* number of allocation groups	*/
+	__u32		logblocks;	/* fsblocks in the log		*/
+	__u32		sectsize;	/* (data) sector size, bytes	*/
+	__u32		inodesize;	/* inode size in bytes		*/
+	__u32		imaxpct;	/* max allowed inode space(%)	*/
+	__u64		datablocks;	/* fsblocks in data subvolume	*/
+	__u64		rtblocks;	/* fsblocks in realtime subvol	*/
+	__u64		rtextents;	/* rt extents in realtime subvol*/
+	__u64		logstart;	/* starting fsblock of the log	*/
+	unsigned char	uuid[16];	/* unique id of the filesystem	*/
+	__u32		sunit;		/* stripe unit, fsblocks	*/
+	__u32		swidth;		/* stripe width, fsblocks	*/
+	__s32		version;	/* structure version		*/
+	__u32		flags;		/* superblock version flags	*/
+	__u32		logsectsize;	/* log sector size, bytes	*/
+	__u32		rtsectsize;	/* realtime sector size, bytes	*/
+	__u32		dirblocksize;	/* directory block size, bytes	*/
+	__u32		logsunit;	/* log stripe unit, bytes	*/
+};
 
 /*
  * Output for XFS_IOC_FSGEOMETRY
  */
-typedef struct xfs_fsop_geom {
+struct xfs_fsop_geom {
 	__u32		blocksize;	/* filesystem (data) block size */
 	__u32		rtextsize;	/* realtime extent size		*/
 	__u32		agblocks;	/* fsblocks in an AG		*/
@@ -171,8 +198,18 @@ typedef struct xfs_fsop_geom {
 	__u32		logsectsize;	/* log sector size, bytes	*/
 	__u32		rtsectsize;	/* realtime sector size, bytes	*/
 	__u32		dirblocksize;	/* directory block size, bytes	*/
-	__u32		logsunit;	/* log stripe unit, bytes */
-} xfs_fsop_geom_t;
+	__u32		logsunit;	/* log stripe unit, bytes	*/
+	uint32_t	sick;		/* o: unhealthy fs & rt metadata */
+	uint32_t	checked;	/* o: checked fs & rt metadata	*/
+	__u64		reserved[17];	/* reserved space		*/
+};
+
+#define XFS_FSOP_GEOM_SICK_COUNTERS	(1 << 0)  /* summary counters */
+#define XFS_FSOP_GEOM_SICK_UQUOTA	(1 << 1)  /* user quota */
+#define XFS_FSOP_GEOM_SICK_GQUOTA	(1 << 2)  /* group quota */
+#define XFS_FSOP_GEOM_SICK_PQUOTA	(1 << 3)  /* project quota */
+#define XFS_FSOP_GEOM_SICK_RT_BITMAP	(1 << 4)  /* realtime bitmap */
+#define XFS_FSOP_GEOM_SICK_RT_SUMMARY	(1 << 5)  /* realtime summary */
 
 /* Output for XFS_FS_COUNTS */
 typedef struct xfs_fsop_counts {
@@ -188,28 +225,30 @@ typedef struct xfs_fsop_resblks {
 	__u64  resblks_avail;
 } xfs_fsop_resblks_t;
 
-#define XFS_FSOP_GEOM_VERSION	0
-
-#define XFS_FSOP_GEOM_FLAGS_ATTR	0x0001	/* attributes in use	*/
-#define XFS_FSOP_GEOM_FLAGS_NLINK	0x0002	/* 32-bit nlink values	*/
-#define XFS_FSOP_GEOM_FLAGS_QUOTA	0x0004	/* quotas enabled	*/
-#define XFS_FSOP_GEOM_FLAGS_IALIGN	0x0008	/* inode alignment	*/
-#define XFS_FSOP_GEOM_FLAGS_DALIGN	0x0010	/* large data alignment */
-#define XFS_FSOP_GEOM_FLAGS_SHARED	0x0020	/* read-only shared	*/
-#define XFS_FSOP_GEOM_FLAGS_EXTFLG	0x0040	/* special extent flag	*/
-#define XFS_FSOP_GEOM_FLAGS_DIRV2	0x0080	/* directory version 2	*/
-#define XFS_FSOP_GEOM_FLAGS_LOGV2	0x0100	/* log format version 2	*/
-#define XFS_FSOP_GEOM_FLAGS_SECTOR	0x0200	/* sector sizes >1BB	*/
-#define XFS_FSOP_GEOM_FLAGS_ATTR2	0x0400	/* inline attributes rework */
-#define XFS_FSOP_GEOM_FLAGS_PROJID32	0x0800	/* 32-bit project IDs	*/
-#define XFS_FSOP_GEOM_FLAGS_DIRV2CI	0x1000	/* ASCII only CI names	*/
-#define XFS_FSOP_GEOM_FLAGS_LAZYSB	0x4000	/* lazy superblock counters */
-#define XFS_FSOP_GEOM_FLAGS_V5SB	0x8000	/* version 5 superblock */
-#define XFS_FSOP_GEOM_FLAGS_FTYPE	0x10000	/* inode directory types */
-#define XFS_FSOP_GEOM_FLAGS_FINOBT	0x20000	/* free inode btree */
-#define XFS_FSOP_GEOM_FLAGS_SPINODES	0x40000	/* sparse inode chunks	*/
-#define XFS_FSOP_GEOM_FLAGS_RMAPBT	0x80000	/* reverse mapping btree */
-#define XFS_FSOP_GEOM_FLAGS_REFLINK	0x100000 /* files can share blocks */
+#define XFS_FSOP_GEOM_VERSION		0
+#define XFS_FSOP_GEOM_VERSION_V5	5
+
+#define XFS_FSOP_GEOM_FLAGS_ATTR	(1 << 0)  /* attributes in use	   */
+#define XFS_FSOP_GEOM_FLAGS_NLINK	(1 << 1)  /* 32-bit nlink values   */
+#define XFS_FSOP_GEOM_FLAGS_QUOTA	(1 << 2)  /* quotas enabled	   */
+#define XFS_FSOP_GEOM_FLAGS_IALIGN	(1 << 3)  /* inode alignment	   */
+#define XFS_FSOP_GEOM_FLAGS_DALIGN	(1 << 4)  /* large data alignment  */
+#define XFS_FSOP_GEOM_FLAGS_SHARED	(1 << 5)  /* read-only shared	   */
+#define XFS_FSOP_GEOM_FLAGS_EXTFLG	(1 << 6)  /* special extent flag   */
+#define XFS_FSOP_GEOM_FLAGS_DIRV2	(1 << 7)  /* directory version 2   */
+#define XFS_FSOP_GEOM_FLAGS_LOGV2	(1 << 8)  /* log format version 2  */
+#define XFS_FSOP_GEOM_FLAGS_SECTOR	(1 << 9)  /* sector sizes >1BB	   */
+#define XFS_FSOP_GEOM_FLAGS_ATTR2	(1 << 10) /* inline attributes rework */
+#define XFS_FSOP_GEOM_FLAGS_PROJID32	(1 << 11) /* 32-bit project IDs	   */
+#define XFS_FSOP_GEOM_FLAGS_DIRV2CI	(1 << 12) /* ASCII only CI names   */
+	/*  -- Do not use --		(1 << 13)    SGI parent pointers   */
+#define XFS_FSOP_GEOM_FLAGS_LAZYSB	(1 << 14) /* lazy superblock counters */
+#define XFS_FSOP_GEOM_FLAGS_V5SB	(1 << 15) /* version 5 superblock  */
+#define XFS_FSOP_GEOM_FLAGS_FTYPE	(1 << 16) /* inode directory types */
+#define XFS_FSOP_GEOM_FLAGS_FINOBT	(1 << 17) /* free inode btree	   */
+#define XFS_FSOP_GEOM_FLAGS_SPINODES	(1 << 18) /* sparse inode chunks   */
+#define XFS_FSOP_GEOM_FLAGS_RMAPBT	(1 << 19) /* reverse mapping btree */
+#define XFS_FSOP_GEOM_FLAGS_REFLINK	(1 << 20) /* files can share blocks */
 
 /*
  * Minimum and maximum sizes need for growth checks.
@@ -238,6 +277,31 @@ typedef struct xfs_fsop_resblks {
 			 (s)->sb_agblocks + XFS_MIN_AG_BLOCKS)
 
 /*
+ * Output for XFS_IOC_AG_GEOMETRY
+ */
+struct xfs_ag_geometry {
+	uint32_t	ag_number;	/* i/o: AG number */
+	uint32_t	ag_length;	/* o: length in blocks */
+	uint32_t	ag_freeblks;	/* o: free space */
+	uint32_t	ag_icount;	/* o: inodes allocated */
+	uint32_t	ag_ifree;	/* o: inodes free */
+	uint32_t	ag_sick;	/* o: sick things in ag */
+	uint32_t	ag_checked;	/* o: checked metadata in ag */
+	uint32_t	ag_reserved32;	/* o: zero */
+	uint64_t	ag_reserved[12];/* o: zero */
+};
+#define XFS_AG_GEOM_SICK_SB	(1 << 0)  /* superblock */
+#define XFS_AG_GEOM_SICK_AGF	(1 << 1)  /* AGF header */
+#define XFS_AG_GEOM_SICK_AGFL	(1 << 2)  /* AGFL header */
+#define XFS_AG_GEOM_SICK_AGI	(1 << 3)  /* AGI header */
+#define XFS_AG_GEOM_SICK_BNOBT	(1 << 4)  /* free space by block */
+#define XFS_AG_GEOM_SICK_CNTBT	(1 << 5)  /* free space by length */
+#define XFS_AG_GEOM_SICK_INOBT	(1 << 6)  /* inode index */
+#define XFS_AG_GEOM_SICK_FINOBT	(1 << 7)  /* free inode index */
+#define XFS_AG_GEOM_SICK_RMAPBT	(1 << 8)  /* reverse mappings */
+#define XFS_AG_GEOM_SICK_REFCNTBT (1 << 9)  /* reference counts */
+
+/*
  * Structures for XFS_IOC_FSGROWFSDATA, XFS_IOC_FSGROWFSLOG & XFS_IOC_FSGROWFSRT
  */
 typedef struct xfs_growfs_data {
@@ -264,7 +328,7 @@ typedef struct xfs_bstime {
 	__s32		tv_nsec;	/* and nanoseconds	*/
 } xfs_bstime_t;
 
-typedef struct xfs_bstat {
+struct xfs_bstat {
 	__u64		bs_ino;		/* inode number			*/
 	__u16		bs_mode;	/* type and mode		*/
 	__u16		bs_nlink;	/* number of links		*/
@@ -285,12 +349,70 @@ typedef struct xfs_bstat {
 #define	bs_projid	bs_projid_lo	/* (previously just bs_projid)	*/
 	__u16		bs_forkoff;	/* inode fork offset in bytes	*/
 	__u16		bs_projid_hi;	/* higher part of project id	*/
-	unsigned char	bs_pad[6];	/* pad space, unused		*/
+	uint16_t	bs_sick;	/* sick inode metadata		*/
+	uint16_t	bs_checked;	/* checked inode metadata	*/
+	unsigned char	bs_pad[2];	/* pad space, unused		*/
 	__u32		bs_cowextsize;	/* cow extent size		*/
 	__u32		bs_dmevmask;	/* DMIG event mask		*/
 	__u16		bs_dmstate;	/* DMIG state info		*/
 	__u16		bs_aextents;	/* attribute number of extents	*/
-} xfs_bstat_t;
+};
+
+/* New bulkstat structure that reports v5 features and fixes padding issues */
+struct xfs_bulkstat {
+	uint64_t	bs_ino;		/* inode number			*/
+	uint64_t	bs_size;	/* file size			*/
+
+	uint64_t	bs_blocks;	/* number of blocks		*/
+	uint64_t	bs_xflags;	/* extended flags		*/
+
+	uint64_t	bs_atime;	/* access time, seconds		*/
+	uint64_t	bs_mtime;	/* modify time, seconds		*/
+
+	uint64_t	bs_ctime;	/* inode change time, seconds	*/
+	uint64_t	bs_btime;	/* creation time, seconds	*/
+
+	uint32_t	bs_gen;		/* generation count		*/
+	uint32_t	bs_uid;		/* user id			*/
+	uint32_t	bs_gid;		/* group id			*/
+	uint32_t	bs_projectid;	/* project id			*/
+
+	uint32_t	bs_atime_nsec;	/* access time, nanoseconds	*/
+	uint32_t	bs_mtime_nsec;	/* modify time, nanoseconds	*/
+	uint32_t	bs_ctime_nsec;	/* inode change time, nanoseconds */
+	uint32_t	bs_btime_nsec;	/* creation time, nanoseconds	*/
+
+	uint32_t	bs_blksize;	/* block size			*/
+	uint32_t	bs_rdev;	/* device value			*/
+	uint32_t	bs_cowextsize_blks; /* cow extent size hint, blocks */
+	uint32_t	bs_extsize_blks; /* extent size hint, blocks	*/
+
+	uint32_t	bs_nlink;	/* number of links		*/
+	uint32_t	bs_extents;	/* number of extents		*/
+	uint32_t	bs_aextents;	/* attribute number of extents	*/
+	uint16_t	bs_version;	/* structure version		*/
+	uint16_t	bs_forkoff;	/* inode fork offset in bytes	*/
+
+	uint16_t	bs_sick;	/* sick inode metadata		*/
+	uint16_t	bs_checked;	/* checked inode metadata	*/
+	uint16_t	bs_mode;	/* type and mode		*/
+	uint16_t	bs_pad2;	/* zeroed			*/
+
+	uint64_t	bs_pad[7];	/* zeroed			*/
+};
+
+#define XFS_BULKSTAT_VERSION_V1	(1)
+#define XFS_BULKSTAT_VERSION_V5	(5)
+
+/* bs_sick flags */
+#define XFS_BS_SICK_INODE	(1 << 0)  /* inode core */
+#define XFS_BS_SICK_BMBTD	(1 << 1)  /* data fork */
+#define XFS_BS_SICK_BMBTA	(1 << 2)  /* attr fork */
+#define XFS_BS_SICK_BMBTC	(1 << 3)  /* cow fork */
+#define XFS_BS_SICK_DIR		(1 << 4)  /* directory */
+#define XFS_BS_SICK_XATTR	(1 << 5)  /* extended attributes */
+#define XFS_BS_SICK_SYMLINK	(1 << 6)  /* symbolic link remote target */
+#define XFS_BS_SICK_PARENT	(1 << 7)  /* parent pointers */
 
 /*
  * Project quota id helpers (previously projid was 16bit only
@@ -298,7 +420,7 @@ typedef struct xfs_bstat {
  * to retain compatibility with "old" filesystems).
  */
 static inline uint32_t
-bstat_get_projid(struct xfs_bstat *bs)
+bstat_get_projid(const struct xfs_bstat *bs)
 {
 	return (uint32_t)bs->bs_projid_hi << 16 | bs->bs_projid_lo;
 }
@@ -306,23 +428,79 @@ bstat_get_projid(struct xfs_bstat *bs)
 /*
  * The user-level BulkStat Request interface structure.
  */
-typedef struct xfs_fsop_bulkreq {
+struct xfs_fsop_bulkreq {
 	__u64		__user *lastip;	/* last inode # pointer		*/
 	__s32		icount;		/* count of entries in buffer	*/
 	void		__user *ubuffer;/* user buffer for inode desc.	*/
 	__s32		__user *ocount;	/* output count pointer		*/
-} xfs_fsop_bulkreq_t;
-
+};
 
 /*
  * Structures returned from xfs_inumbers routine (XFS_IOC_FSINUMBERS).
  */
-typedef struct xfs_inogrp {
+struct xfs_inogrp {
 	__u64		xi_startino;	/* starting inode number	*/
 	__s32		xi_alloccount;	/* # bits set in allocmask	*/
 	__u64		xi_allocmask;	/* mask of allocated inodes	*/
-} xfs_inogrp_t;
+};
+
+/* New inumbers structure that reports v5 features and fixes padding issues */
+struct xfs_inumbers {
+	uint64_t	xi_startino;	/* starting inode number	*/
+	uint64_t	xi_allocmask;	/* mask of allocated inodes	*/
+	uint8_t		xi_alloccount;	/* # bits set in allocmask	*/
+	uint8_t		xi_version;	/* version			*/
+	uint8_t		xi_padding[6];	/* zero				*/
+};
+
+#define XFS_INUMBERS_VERSION_V1	(1)
+#define XFS_INUMBERS_VERSION_V5	(5)
+
+/* Header for bulk inode requests. */
+struct xfs_bulk_ireq {
+	uint64_t	ino;		/* I/O: start with this inode	*/
+	uint32_t	flags;		/* I/O: operation flags		*/
+	uint32_t	icount;		/* I: count of entries in buffer */
+	uint32_t	ocount;		/* O: count of entries filled out */
+	uint32_t	agno;		/* I: see comment for IREQ_AGNO	*/
+	uint64_t	reserved[5];	/* must be zero			*/
+};
+
+/*
+ * Only return results from the specified @agno.  If @ino is zero, start
+ * with the first inode of @agno.
+ */
+#define XFS_BULK_IREQ_AGNO	(1 << 0)
+
+/*
+ * Return bulkstat information for a single inode, where @ino value is a
+ * special value, not a literal inode number.  See the XFS_BULK_IREQ_SPECIAL_*
+ * values below.  Not compatible with XFS_BULK_IREQ_AGNO.
+ */
+#define XFS_BULK_IREQ_SPECIAL	(1 << 1)
+
+#define XFS_BULK_IREQ_FLAGS_ALL	(XFS_BULK_IREQ_AGNO | \
+				 XFS_BULK_IREQ_SPECIAL)
+
+/* Operate on the root directory inode. */
+#define XFS_BULK_IREQ_SPECIAL_ROOT	(1)
+
+/*
+ * ioctl structures for v5 bulkstat and inumbers requests
+ */
+struct xfs_bulkstat_req {
+	struct xfs_bulk_ireq	hdr;
+	struct xfs_bulkstat	bulkstat[];
+};
+#define XFS_BULKSTAT_REQ_SIZE(nr)	(sizeof(struct xfs_bulkstat_req) + \
+					 (nr) * sizeof(struct xfs_bulkstat))
 
+struct xfs_inumbers_req {
+	struct xfs_bulk_ireq	hdr;
+	struct xfs_inumbers	inumbers[];
+};
+#define XFS_INUMBERS_REQ_SIZE(nr)	(sizeof(struct xfs_inumbers_req) + \
+					 (nr) * sizeof(struct xfs_inumbers))
 
 /*
  * Error injection.
@@ -453,7 +631,7 @@ typedef struct xfs_swapext
 	xfs_off_t	sx_offset;	/* offset into file */
 	xfs_off_t	sx_length;	/* leng from offset */
 	char		sx_pad[16];	/* pad space, unused */
-	xfs_bstat_t	sx_stat;	/* stat of target b4 copy */
+	struct xfs_bstat sx_stat;	/* stat of target b4 copy */
 } xfs_swapext_t;
 
 /*
@@ -502,9 +680,10 @@ struct xfs_scrub_metadata {
 #define XFS_SCRUB_TYPE_UQUOTA	21	/* user quotas */
 #define XFS_SCRUB_TYPE_GQUOTA	22	/* group quotas */
 #define XFS_SCRUB_TYPE_PQUOTA	23	/* project quotas */
+#define XFS_SCRUB_TYPE_FSCOUNTERS 24	/* fs summary counters */
 
 /* Number of scrub subcommands. */
-#define XFS_SCRUB_TYPE_NR	24
+#define XFS_SCRUB_TYPE_NR	25
 
 /* i: Repair this metadata. */
 #define XFS_SCRUB_IFLAG_REPAIR		(1 << 0)
@@ -590,6 +769,7 @@ struct xfs_scrub_metadata {
 #define XFS_IOC_FREE_EOFBLOCKS	_IOR ('X', 58, struct xfs_fs_eofblocks)
 /*	XFS_IOC_GETFSMAP ------ hoisted 59         */
 #define XFS_IOC_SCRUB_METADATA	_IOWR('X', 60, struct xfs_scrub_metadata)
+#define XFS_IOC_AG_GEOMETRY	_IOWR('X', 61, struct xfs_ag_geometry)
 
 /*
  * ioctl commands that replace IRIX syssgi()'s
@@ -620,8 +800,11 @@ struct xfs_scrub_metadata {
 #define XFS_IOC_FSSETDM_BY_HANDLE    _IOW ('X', 121, struct xfs_fsop_setdm_handlereq)
 #define XFS_IOC_ATTRLIST_BY_HANDLE   _IOW ('X', 122, struct xfs_fsop_attrlist_handlereq)
 #define XFS_IOC_ATTRMULTI_BY_HANDLE  _IOW ('X', 123, struct xfs_fsop_attrmulti_handlereq)
-#define XFS_IOC_FSGEOMETRY	     _IOR ('X', 124, struct xfs_fsop_geom)
+#define XFS_IOC_FSGEOMETRY_V4	     _IOR ('X', 124, struct xfs_fsop_geom_v4)
 #define XFS_IOC_GOINGDOWN	     _IOR ('X', 125, uint32_t)
+#define XFS_IOC_FSGEOMETRY	     _IOR ('X', 126, struct xfs_fsop_geom)
+#define XFS_IOC_BULKSTAT	     _IOR ('X', 127, struct xfs_bulkstat_req)
+#define XFS_IOC_INUMBERS	     _IOR ('X', 128, struct xfs_inumbers_req)
 /*	XFS_IOC_GETFSUUID ---------- deprecated 140	 */
 
 
diff --git a/fs/xfs/libxfs/xfs_health.h b/fs/xfs/libxfs/xfs_health.h
new file mode 100644
index 000000000000..272005ac8c88
--- /dev/null
+++ b/fs/xfs/libxfs/xfs_health.h
@@ -0,0 +1,190 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#ifndef __XFS_HEALTH_H__
+#define __XFS_HEALTH_H__
+
+/*
+ * In-Core Filesystem Health Assessments
+ * =====================================
+ *
+ * We'd like to be able to summarize the current health status of the
+ * filesystem so that the administrator knows when it's necessary to schedule
+ * some downtime for repairs.  Until then, we would also like to avoid abrupt
+ * shutdowns due to corrupt metadata.
+ *
+ * The online scrub feature evaluates the health of all filesystem metadata.
+ * When scrub detects corruption in a piece of metadata it will set the
+ * corresponding sickness flag, and repair will clear it if successful.  If
+ * problems remain at unmount time, we can also request manual intervention by
+ * logging a notice to run xfs_repair.
+ *
+ * Each health tracking group uses a pair of fields for reporting.  The
+ * "checked" field tell us if a given piece of metadata has ever been examined,
+ * and the "sick" field tells us if that piece was found to need repairs.
+ * Therefore we can conclude that for a given sick flag value:
+ *
+ *  - checked && sick  => metadata needs repair
+ *  - checked && !sick => metadata is ok
+ *  - !checked         => has not been examined since mount
+ */
+
+struct xfs_mount;
+struct xfs_perag;
+struct xfs_inode;
+struct xfs_fsop_geom;
+
+/* Observable health issues for metadata spanning the entire filesystem. */
+#define XFS_SICK_FS_COUNTERS	(1 << 0)  /* summary counters */
+#define XFS_SICK_FS_UQUOTA	(1 << 1)  /* user quota */
+#define XFS_SICK_FS_GQUOTA	(1 << 2)  /* group quota */
+#define XFS_SICK_FS_PQUOTA	(1 << 3)  /* project quota */
+
+/* Observable health issues for realtime volume metadata. */
+#define XFS_SICK_RT_BITMAP	(1 << 0)  /* realtime bitmap */
+#define XFS_SICK_RT_SUMMARY	(1 << 1)  /* realtime summary */
+
+/* Observable health issues for AG metadata. */
+#define XFS_SICK_AG_SB		(1 << 0)  /* superblock */
+#define XFS_SICK_AG_AGF		(1 << 1)  /* AGF header */
+#define XFS_SICK_AG_AGFL	(1 << 2)  /* AGFL header */
+#define XFS_SICK_AG_AGI		(1 << 3)  /* AGI header */
+#define XFS_SICK_AG_BNOBT	(1 << 4)  /* free space by block */
+#define XFS_SICK_AG_CNTBT	(1 << 5)  /* free space by length */
+#define XFS_SICK_AG_INOBT	(1 << 6)  /* inode index */
+#define XFS_SICK_AG_FINOBT	(1 << 7)  /* free inode index */
+#define XFS_SICK_AG_RMAPBT	(1 << 8)  /* reverse mappings */
+#define XFS_SICK_AG_REFCNTBT	(1 << 9)  /* reference counts */
+
+/* Observable health issues for inode metadata. */
+#define XFS_SICK_INO_CORE	(1 << 0)  /* inode core */
+#define XFS_SICK_INO_BMBTD	(1 << 1)  /* data fork */
+#define XFS_SICK_INO_BMBTA	(1 << 2)  /* attr fork */
+#define XFS_SICK_INO_BMBTC	(1 << 3)  /* cow fork */
+#define XFS_SICK_INO_DIR	(1 << 4)  /* directory */
+#define XFS_SICK_INO_XATTR	(1 << 5)  /* extended attributes */
+#define XFS_SICK_INO_SYMLINK	(1 << 6)  /* symbolic link remote target */
+#define XFS_SICK_INO_PARENT	(1 << 7)  /* parent pointers */
+
+/* Primary evidence of health problems in a given group. */
+#define XFS_SICK_FS_PRIMARY	(XFS_SICK_FS_COUNTERS | \
+				 XFS_SICK_FS_UQUOTA | \
+				 XFS_SICK_FS_GQUOTA | \
+				 XFS_SICK_FS_PQUOTA)
+
+#define XFS_SICK_RT_PRIMARY	(XFS_SICK_RT_BITMAP | \
+				 XFS_SICK_RT_SUMMARY)
+
+#define XFS_SICK_AG_PRIMARY	(XFS_SICK_AG_SB | \
+				 XFS_SICK_AG_AGF | \
+				 XFS_SICK_AG_AGFL | \
+				 XFS_SICK_AG_AGI | \
+				 XFS_SICK_AG_BNOBT | \
+				 XFS_SICK_AG_CNTBT | \
+				 XFS_SICK_AG_INOBT | \
+				 XFS_SICK_AG_FINOBT | \
+				 XFS_SICK_AG_RMAPBT | \
+				 XFS_SICK_AG_REFCNTBT)
+
+#define XFS_SICK_INO_PRIMARY	(XFS_SICK_INO_CORE | \
+				 XFS_SICK_INO_BMBTD | \
+				 XFS_SICK_INO_BMBTA | \
+				 XFS_SICK_INO_BMBTC | \
+				 XFS_SICK_INO_DIR | \
+				 XFS_SICK_INO_XATTR | \
+				 XFS_SICK_INO_SYMLINK | \
+				 XFS_SICK_INO_PARENT)
+
+/* These functions must be provided by the xfs implementation. */
+
+void xfs_fs_mark_sick(struct xfs_mount *mp, unsigned int mask);
+void xfs_fs_mark_healthy(struct xfs_mount *mp, unsigned int mask);
+void xfs_fs_measure_sickness(struct xfs_mount *mp, unsigned int *sick,
+		unsigned int *checked);
+
+void xfs_rt_mark_sick(struct xfs_mount *mp, unsigned int mask);
+void xfs_rt_mark_healthy(struct xfs_mount *mp, unsigned int mask);
+void xfs_rt_measure_sickness(struct xfs_mount *mp, unsigned int *sick,
+		unsigned int *checked);
+
+void xfs_ag_mark_sick(struct xfs_perag *pag, unsigned int mask);
+void xfs_ag_mark_healthy(struct xfs_perag *pag, unsigned int mask);
+void xfs_ag_measure_sickness(struct xfs_perag *pag, unsigned int *sick,
+		unsigned int *checked);
+
+void xfs_inode_mark_sick(struct xfs_inode *ip, unsigned int mask);
+void xfs_inode_mark_healthy(struct xfs_inode *ip, unsigned int mask);
+void xfs_inode_measure_sickness(struct xfs_inode *ip, unsigned int *sick,
+		unsigned int *checked);
+
+void xfs_health_unmount(struct xfs_mount *mp);
+
+/* Now some helpers. */
+
+static inline bool
+xfs_fs_has_sickness(struct xfs_mount *mp, unsigned int mask)
+{
+	unsigned int	sick, checked;
+
+	xfs_fs_measure_sickness(mp, &sick, &checked);
+	return sick & mask;
+}
+
+static inline bool
+xfs_rt_has_sickness(struct xfs_mount *mp, unsigned int mask)
+{
+	unsigned int	sick, checked;
+
+	xfs_rt_measure_sickness(mp, &sick, &checked);
+	return sick & mask;
+}
+
+static inline bool
+xfs_ag_has_sickness(struct xfs_perag *pag, unsigned int mask)
+{
+	unsigned int	sick, checked;
+
+	xfs_ag_measure_sickness(pag, &sick, &checked);
+	return sick & mask;
+}
+
+static inline bool
+xfs_inode_has_sickness(struct xfs_inode *ip, unsigned int mask)
+{
+	unsigned int	sick, checked;
+
+	xfs_inode_measure_sickness(ip, &sick, &checked);
+	return sick & mask;
+}
+
+static inline bool
+xfs_fs_is_healthy(struct xfs_mount *mp)
+{
+	return !xfs_fs_has_sickness(mp, -1U);
+}
+
+static inline bool
+xfs_rt_is_healthy(struct xfs_mount *mp)
+{
+	return !xfs_rt_has_sickness(mp, -1U);
+}
+
+static inline bool
+xfs_ag_is_healthy(struct xfs_perag *pag)
+{
+	return !xfs_ag_has_sickness(pag, -1U);
+}
+
+static inline bool
+xfs_inode_is_healthy(struct xfs_inode *ip)
+{
+	return !xfs_inode_has_sickness(ip, -1U);
+}
+
+void xfs_fsop_geom_health(struct xfs_mount *mp, struct xfs_fsop_geom *geo);
+void xfs_ag_geom_health(struct xfs_perag *pag, struct xfs_ag_geometry *ageo);
+void xfs_bulkstat_health(struct xfs_inode *ip, struct xfs_bulkstat *bs);
+
+#endif	/* __XFS_HEALTH_H__ */
diff --git a/fs/xfs/libxfs/xfs_ialloc.c b/fs/xfs/libxfs/xfs_ialloc.c
index d32152fc8a6c..04377ab75863 100644
--- a/fs/xfs/libxfs/xfs_ialloc.c
+++ b/fs/xfs/libxfs/xfs_ialloc.c
@@ -12,17 +12,14 @@
 #include "xfs_bit.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_ialloc.h"
 #include "xfs_ialloc_btree.h"
 #include "xfs_alloc.h"
-#include "xfs_rtalloc.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"
 #include "xfs_bmap.h"
-#include "xfs_cksum.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_icreate_item.h"
@@ -31,20 +28,6 @@
 #include "xfs_log.h"
 #include "xfs_rmap.h"
 
-
-/*
- * Allocation group level functions.
- */
-int
-xfs_ialloc_cluster_alignment(
-	struct xfs_mount	*mp)
-{
-	if (xfs_sb_version_hasalign(&mp->m_sb) &&
-	    mp->m_sb.sb_inoalignmt >= xfs_icluster_size_fsb(mp))
-		return mp->m_sb.sb_inoalignmt;
-	return 1;
-}
-
 /*
  * Lookup a record by ino in the btree given by cur.
  */
@@ -299,7 +282,7 @@ xfs_ialloc_inode_init(
 	 * sizes, manipulate the inodes in buffers  which are multiples of the
 	 * blocks size.
 	 */
-	nbufs = length / mp->m_blocks_per_cluster;
+	nbufs = length / M_IGEO(mp)->blocks_per_cluster;
 
 	/*
 	 * Figure out what version number to use in the inodes we create.  If
@@ -343,9 +326,10 @@ xfs_ialloc_inode_init(
 		 * Get the block.
 		 */
 		d = XFS_AGB_TO_DADDR(mp, agno, agbno +
-				(j * mp->m_blocks_per_cluster));
+				(j * M_IGEO(mp)->blocks_per_cluster));
 		fbuf = xfs_trans_get_buf(tp, mp->m_ddev_targp, d,
-					 mp->m_bsize * mp->m_blocks_per_cluster,
+					 mp->m_bsize *
+					 M_IGEO(mp)->blocks_per_cluster,
 					 XBF_UNMAPPED);
 		if (!fbuf)
 			return -ENOMEM;
@@ -353,7 +337,7 @@ xfs_ialloc_inode_init(
 		/* Initialize the inode buffers and log them appropriately. */
 		fbuf->b_ops = &xfs_inode_buf_ops;
 		xfs_buf_zero(fbuf, 0, BBTOB(fbuf->b_length));
-		for (i = 0; i < mp->m_inodes_per_cluster; i++) {
+		for (i = 0; i < M_IGEO(mp)->inodes_per_cluster; i++) {
 			int	ioffset = i << mp->m_sb.sb_inodelog;
 			uint	isize = xfs_dinode_size(version);
 
@@ -616,24 +600,26 @@ error:
  * Allocate new inodes in the allocation group specified by agbp.
  * Return 0 for success, else error code.
  */
-STATIC int				/* error code or 0 */
+STATIC int
 xfs_ialloc_ag_alloc(
-	xfs_trans_t	*tp,		/* transaction pointer */
-	xfs_buf_t	*agbp,		/* alloc group buffer */
-	int		*alloc)
+	struct xfs_trans	*tp,
+	struct xfs_buf		*agbp,
+	int			*alloc)
 {
-	xfs_agi_t	*agi;		/* allocation group header */
-	xfs_alloc_arg_t	args;		/* allocation argument structure */
-	xfs_agnumber_t	agno;
-	int		error;
-	xfs_agino_t	newino;		/* new first inode's number */
-	xfs_agino_t	newlen;		/* new number of inodes */
-	int		isaligned = 0;	/* inode allocation at stripe unit */
-					/* boundary */
-	uint16_t	allocmask = (uint16_t) -1; /* init. to full chunk */
+	struct xfs_agi		*agi;
+	struct xfs_alloc_arg	args;
+	xfs_agnumber_t		agno;
+	int			error;
+	xfs_agino_t		newino;		/* new first inode's number */
+	xfs_agino_t		newlen;		/* new number of inodes */
+	int			isaligned = 0;	/* inode allocation at stripe */
+						/* unit boundary */
+	/* init. to full chunk */
+	uint16_t		allocmask = (uint16_t) -1;
 	struct xfs_inobt_rec_incore rec;
-	struct xfs_perag *pag;
-	int		do_sparse = 0;
+	struct xfs_perag	*pag;
+	struct xfs_ino_geometry	*igeo = M_IGEO(tp->t_mountp);
+	int			do_sparse = 0;
 
 	memset(&args, 0, sizeof(args));
 	args.tp = tp;
@@ -644,7 +630,7 @@ xfs_ialloc_ag_alloc(
 #ifdef DEBUG
 	/* randomly do sparse inode allocations */
 	if (xfs_sb_version_hassparseinodes(&tp->t_mountp->m_sb) &&
-	    args.mp->m_ialloc_min_blks < args.mp->m_ialloc_blks)
+	    igeo->ialloc_min_blks < igeo->ialloc_blks)
 		do_sparse = prandom_u32() & 1;
 #endif
 
@@ -652,12 +638,12 @@ xfs_ialloc_ag_alloc(
 	 * Locking will ensure that we don't have two callers in here
 	 * at one time.
 	 */
-	newlen = args.mp->m_ialloc_inos;
-	if (args.mp->m_maxicount &&
+	newlen = igeo->ialloc_inos;
+	if (igeo->maxicount &&
 	    percpu_counter_read_positive(&args.mp->m_icount) + newlen >
-							args.mp->m_maxicount)
+							igeo->maxicount)
 		return -ENOSPC;
-	args.minlen = args.maxlen = args.mp->m_ialloc_blks;
+	args.minlen = args.maxlen = igeo->ialloc_blks;
 	/*
 	 * First try to allocate inodes contiguous with the last-allocated
 	 * chunk of inodes.  If the filesystem is striped, this will fill
@@ -667,7 +653,7 @@ xfs_ialloc_ag_alloc(
 	newino = be32_to_cpu(agi->agi_newino);
 	agno = be32_to_cpu(agi->agi_seqno);
 	args.agbno = XFS_AGINO_TO_AGBNO(args.mp, newino) +
-		     args.mp->m_ialloc_blks;
+		     igeo->ialloc_blks;
 	if (do_sparse)
 		goto sparse_alloc;
 	if (likely(newino != NULLAGINO &&
@@ -690,10 +676,10 @@ xfs_ialloc_ag_alloc(
 		 * but not to use them in the actual exact allocation.
 		 */
 		args.alignment = 1;
-		args.minalignslop = args.mp->m_cluster_align - 1;
+		args.minalignslop = igeo->cluster_align - 1;
 
 		/* Allow space for the inode btree to split. */
-		args.minleft = args.mp->m_in_maxlevels - 1;
+		args.minleft = igeo->inobt_maxlevels - 1;
 		if ((error = xfs_alloc_vextent(&args)))
 			return error;
 
@@ -720,12 +706,12 @@ xfs_ialloc_ag_alloc(
 		 * pieces, so don't need alignment anyway.
 		 */
 		isaligned = 0;
-		if (args.mp->m_sinoalign) {
+		if (igeo->ialloc_align) {
 			ASSERT(!(args.mp->m_flags & XFS_MOUNT_NOALIGN));
 			args.alignment = args.mp->m_dalign;
 			isaligned = 1;
 		} else
-			args.alignment = args.mp->m_cluster_align;
+			args.alignment = igeo->cluster_align;
 		/*
 		 * Need to figure out where to allocate the inode blocks.
 		 * Ideally they should be spaced out through the a.g.
@@ -741,7 +727,7 @@ xfs_ialloc_ag_alloc(
 		/*
 		 * Allow space for the inode btree to split.
 		 */
-		args.minleft = args.mp->m_in_maxlevels - 1;
+		args.minleft = igeo->inobt_maxlevels - 1;
 		if ((error = xfs_alloc_vextent(&args)))
 			return error;
 	}
@@ -754,7 +740,7 @@ xfs_ialloc_ag_alloc(
 		args.type = XFS_ALLOCTYPE_NEAR_BNO;
 		args.agbno = be32_to_cpu(agi->agi_root);
 		args.fsbno = XFS_AGB_TO_FSB(args.mp, agno, args.agbno);
-		args.alignment = args.mp->m_cluster_align;
+		args.alignment = igeo->cluster_align;
 		if ((error = xfs_alloc_vextent(&args)))
 			return error;
 	}
@@ -764,7 +750,7 @@ xfs_ialloc_ag_alloc(
 	 * the sparse allocation length is smaller than a full chunk.
 	 */
 	if (xfs_sb_version_hassparseinodes(&args.mp->m_sb) &&
-	    args.mp->m_ialloc_min_blks < args.mp->m_ialloc_blks &&
+	    igeo->ialloc_min_blks < igeo->ialloc_blks &&
 	    args.fsbno == NULLFSBLOCK) {
 sparse_alloc:
 		args.type = XFS_ALLOCTYPE_NEAR_BNO;
@@ -773,7 +759,7 @@ sparse_alloc:
 		args.alignment = args.mp->m_sb.sb_spino_align;
 		args.prod = 1;
 
-		args.minlen = args.mp->m_ialloc_min_blks;
+		args.minlen = igeo->ialloc_min_blks;
 		args.maxlen = args.minlen;
 
 		/*
@@ -789,7 +775,7 @@ sparse_alloc:
 		args.min_agbno = args.mp->m_sb.sb_inoalignmt;
 		args.max_agbno = round_down(args.mp->m_sb.sb_agblocks,
 					    args.mp->m_sb.sb_inoalignmt) -
-				 args.mp->m_ialloc_blks;
+				 igeo->ialloc_blks;
 
 		error = xfs_alloc_vextent(&args);
 		if (error)
@@ -1006,7 +992,7 @@ xfs_ialloc_ag_select(
 		 * space needed for alignment of inode chunks when checking the
 		 * longest contiguous free space in the AG - this prevents us
 		 * from getting ENOSPC because we have free space larger than
-		 * m_ialloc_blks but alignment constraints prevent us from using
+		 * ialloc_blks but alignment constraints prevent us from using
 		 * it.
 		 *
 		 * If we can't find an AG with space for full alignment slack to
@@ -1015,9 +1001,9 @@ xfs_ialloc_ag_select(
 		 * if we fail allocation due to alignment issues then it is most
 		 * likely a real ENOSPC condition.
 		 */
-		ineed = mp->m_ialloc_min_blks;
+		ineed = M_IGEO(mp)->ialloc_min_blks;
 		if (flags && ineed > 1)
-			ineed += mp->m_cluster_align;
+			ineed += M_IGEO(mp)->cluster_align;
 		longest = pag->pagf_longest;
 		if (!longest)
 			longest = pag->pagf_flcount > 0;
@@ -1703,6 +1689,7 @@ xfs_dialloc(
 	int			noroom = 0;
 	xfs_agnumber_t		start_agno;
 	struct xfs_perag	*pag;
+	struct xfs_ino_geometry	*igeo = M_IGEO(mp);
 	int			okalloc = 1;
 
 	if (*IO_agbp) {
@@ -1733,9 +1720,9 @@ xfs_dialloc(
 	 * Read rough value of mp->m_icount by percpu_counter_read_positive,
 	 * which will sacrifice the preciseness but improve the performance.
 	 */
-	if (mp->m_maxicount &&
-	    percpu_counter_read_positive(&mp->m_icount) + mp->m_ialloc_inos
-							> mp->m_maxicount) {
+	if (igeo->maxicount &&
+	    percpu_counter_read_positive(&mp->m_icount) + igeo->ialloc_inos
+							> igeo->maxicount) {
 		noroom = 1;
 		okalloc = 0;
 	}
@@ -1852,7 +1839,8 @@ xfs_difree_inode_chunk(
 	if (!xfs_inobt_issparse(rec->ir_holemask)) {
 		/* not sparse, calculate extent info directly */
 		xfs_bmap_add_free(tp, XFS_AGB_TO_FSB(mp, agno, sagbno),
-				  mp->m_ialloc_blks, &XFS_RMAP_OINFO_INODES);
+				  M_IGEO(mp)->ialloc_blks,
+				  &XFS_RMAP_OINFO_INODES);
 		return;
 	}
 
@@ -2261,7 +2249,7 @@ xfs_imap_lookup(
 
 	/* check that the returned record contains the required inode */
 	if (rec.ir_startino > agino ||
-	    rec.ir_startino + mp->m_ialloc_inos <= agino)
+	    rec.ir_startino + M_IGEO(mp)->ialloc_inos <= agino)
 		return -EINVAL;
 
 	/* for untrusted inodes check it is allocated first */
@@ -2352,7 +2340,7 @@ xfs_imap(
 	 * If the inode cluster size is the same as the blocksize or
 	 * smaller we get to the buffer by simple arithmetics.
 	 */
-	if (mp->m_blocks_per_cluster == 1) {
+	if (M_IGEO(mp)->blocks_per_cluster == 1) {
 		offset = XFS_INO_TO_OFFSET(mp, ino);
 		ASSERT(offset < mp->m_sb.sb_inopblock);
 
@@ -2368,8 +2356,8 @@ xfs_imap(
 	 * find the location. Otherwise we have to do a btree
 	 * lookup to find the location.
 	 */
-	if (mp->m_inoalign_mask) {
-		offset_agbno = agbno & mp->m_inoalign_mask;
+	if (M_IGEO(mp)->inoalign_mask) {
+		offset_agbno = agbno & M_IGEO(mp)->inoalign_mask;
 		chunk_agbno = agbno - offset_agbno;
 	} else {
 		error = xfs_imap_lookup(mp, tp, agno, agino, agbno,
@@ -2381,13 +2369,13 @@ xfs_imap(
 out_map:
 	ASSERT(agbno >= chunk_agbno);
 	cluster_agbno = chunk_agbno +
-		((offset_agbno / mp->m_blocks_per_cluster) *
-		 mp->m_blocks_per_cluster);
+		((offset_agbno / M_IGEO(mp)->blocks_per_cluster) *
+		 M_IGEO(mp)->blocks_per_cluster);
 	offset = ((agbno - cluster_agbno) * mp->m_sb.sb_inopblock) +
 		XFS_INO_TO_OFFSET(mp, ino);
 
 	imap->im_blkno = XFS_AGB_TO_DADDR(mp, agno, cluster_agbno);
-	imap->im_len = XFS_FSB_TO_BB(mp, mp->m_blocks_per_cluster);
+	imap->im_len = XFS_FSB_TO_BB(mp, M_IGEO(mp)->blocks_per_cluster);
 	imap->im_boffset = (unsigned short)(offset << mp->m_sb.sb_inodelog);
 
 	/*
@@ -2409,20 +2397,6 @@ out_map:
 }
 
 /*
- * Compute and fill in value of m_in_maxlevels.
- */
-void
-xfs_ialloc_compute_maxlevels(
-	xfs_mount_t	*mp)		/* file system mount structure */
-{
-	uint		inodes;
-
-	inodes = (1LL << XFS_INO_AGINO_BITS(mp)) >> XFS_INODES_PER_CHUNK_LOG;
-	mp->m_in_maxlevels = xfs_btree_compute_maxlevels(mp->m_inobt_mnr,
-							 inodes);
-}
-
-/*
  * Log specified fields for the ag hdr (inode section). The growth of the agi
  * structure over time requires that we interpret the buffer as two logical
  * regions delineated by the end of the unlinked list. This is due to the size
@@ -2493,7 +2467,7 @@ static xfs_failaddr_t
 xfs_agi_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	struct xfs_agi	*agi = XFS_BUF_TO_AGI(bp);
 	int		i;
 
@@ -2508,7 +2482,7 @@ xfs_agi_verify(
 	/*
 	 * Validate the magic number of the agi block.
 	 */
-	if (agi->agi_magicnum != cpu_to_be32(XFS_AGI_MAGIC))
+	if (!xfs_verify_magic(bp, agi->agi_magicnum))
 		return __this_address;
 	if (!XFS_AGI_GOOD_VERSION(be32_to_cpu(agi->agi_versionnum)))
 		return __this_address;
@@ -2545,7 +2519,7 @@ static void
 xfs_agi_read_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	xfs_failaddr_t	fa;
 
 	if (xfs_sb_version_hascrc(&mp->m_sb) &&
@@ -2562,7 +2536,7 @@ static void
 xfs_agi_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	xfs_failaddr_t		fa;
 
@@ -2582,6 +2556,7 @@ xfs_agi_write_verify(
 
 const struct xfs_buf_ops xfs_agi_buf_ops = {
 	.name = "xfs_agi",
+	.magic = { cpu_to_be32(XFS_AGI_MAGIC), cpu_to_be32(XFS_AGI_MAGIC) },
 	.verify_read = xfs_agi_read_verify,
 	.verify_write = xfs_agi_write_verify,
 	.verify_struct = xfs_agi_verify,
@@ -2767,3 +2742,110 @@ xfs_ialloc_count_inodes(
 	*freecount = ci.freecount;
 	return 0;
 }
+
+/*
+ * Initialize inode-related geometry information.
+ *
+ * Compute the inode btree min and max levels and set maxicount.
+ *
+ * Set the inode cluster size.  This may still be overridden by the file
+ * system block size if it is larger than the chosen cluster size.
+ *
+ * For v5 filesystems, scale the cluster size with the inode size to keep a
+ * constant ratio of inode per cluster buffer, but only if mkfs has set the
+ * inode alignment value appropriately for larger cluster sizes.
+ *
+ * Then compute the inode cluster alignment information.
+ */
+void
+xfs_ialloc_setup_geometry(
+	struct xfs_mount	*mp)
+{
+	struct xfs_sb		*sbp = &mp->m_sb;
+	struct xfs_ino_geometry	*igeo = M_IGEO(mp);
+	uint64_t		icount;
+	uint			inodes;
+
+	/* Compute inode btree geometry. */
+	igeo->agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
+	igeo->inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1);
+	igeo->inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0);
+	igeo->inobt_mnr[0] = igeo->inobt_mxr[0] / 2;
+	igeo->inobt_mnr[1] = igeo->inobt_mxr[1] / 2;
+
+	igeo->ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK,
+			sbp->sb_inopblock);
+	igeo->ialloc_blks = igeo->ialloc_inos >> sbp->sb_inopblog;
+
+	if (sbp->sb_spino_align)
+		igeo->ialloc_min_blks = sbp->sb_spino_align;
+	else
+		igeo->ialloc_min_blks = igeo->ialloc_blks;
+
+	/* Compute and fill in value of m_ino_geo.inobt_maxlevels. */
+	inodes = (1LL << XFS_INO_AGINO_BITS(mp)) >> XFS_INODES_PER_CHUNK_LOG;
+	igeo->inobt_maxlevels = xfs_btree_compute_maxlevels(igeo->inobt_mnr,
+			inodes);
+
+	/* Set the maximum inode count for this filesystem. */
+	if (sbp->sb_imax_pct) {
+		/*
+		 * Make sure the maximum inode count is a multiple
+		 * of the units we allocate inodes in.
+		 */
+		icount = sbp->sb_dblocks * sbp->sb_imax_pct;
+		do_div(icount, 100);
+		do_div(icount, igeo->ialloc_blks);
+		igeo->maxicount = XFS_FSB_TO_INO(mp,
+				icount * igeo->ialloc_blks);
+	} else {
+		igeo->maxicount = 0;
+	}
+
+	/*
+	 * Compute the desired size of an inode cluster buffer size, which
+	 * starts at 8K and (on v5 filesystems) scales up with larger inode
+	 * sizes.
+	 *
+	 * Preserve the desired inode cluster size because the sparse inodes
+	 * feature uses that desired size (not the actual size) to compute the
+	 * sparse inode alignment.  The mount code validates this value, so we
+	 * cannot change the behavior.
+	 */
+	igeo->inode_cluster_size_raw = XFS_INODE_BIG_CLUSTER_SIZE;
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
+		int	new_size = igeo->inode_cluster_size_raw;
+
+		new_size *= mp->m_sb.sb_inodesize / XFS_DINODE_MIN_SIZE;
+		if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size))
+			igeo->inode_cluster_size_raw = new_size;
+	}
+
+	/* Calculate inode cluster ratios. */
+	if (igeo->inode_cluster_size_raw > mp->m_sb.sb_blocksize)
+		igeo->blocks_per_cluster = XFS_B_TO_FSBT(mp,
+				igeo->inode_cluster_size_raw);
+	else
+		igeo->blocks_per_cluster = 1;
+	igeo->inode_cluster_size = XFS_FSB_TO_B(mp, igeo->blocks_per_cluster);
+	igeo->inodes_per_cluster = XFS_FSB_TO_INO(mp, igeo->blocks_per_cluster);
+
+	/* Calculate inode cluster alignment. */
+	if (xfs_sb_version_hasalign(&mp->m_sb) &&
+	    mp->m_sb.sb_inoalignmt >= igeo->blocks_per_cluster)
+		igeo->cluster_align = mp->m_sb.sb_inoalignmt;
+	else
+		igeo->cluster_align = 1;
+	igeo->inoalign_mask = igeo->cluster_align - 1;
+	igeo->cluster_align_inodes = XFS_FSB_TO_INO(mp, igeo->cluster_align);
+
+	/*
+	 * If we are using stripe alignment, check whether
+	 * the stripe unit is a multiple of the inode alignment
+	 */
+	if (mp->m_dalign && igeo->inoalign_mask &&
+	    !(mp->m_dalign & igeo->inoalign_mask))
+		igeo->ialloc_align = mp->m_dalign;
+	else
+		igeo->ialloc_align = 0;
+}
diff --git a/fs/xfs/libxfs/xfs_ialloc.h b/fs/xfs/libxfs/xfs_ialloc.h
index e936b7cc9389..323592d563d5 100644
--- a/fs/xfs/libxfs/xfs_ialloc.h
+++ b/fs/xfs/libxfs/xfs_ialloc.h
@@ -23,16 +23,6 @@ struct xfs_icluster {
 					 * sparse chunks */
 };
 
-/* Calculate and return the number of filesystem blocks per inode cluster */
-static inline int
-xfs_icluster_size_fsb(
-	struct xfs_mount	*mp)
-{
-	if (mp->m_sb.sb_blocksize >= mp->m_inode_cluster_size)
-		return 1;
-	return mp->m_inode_cluster_size >> mp->m_sb.sb_blocklog;
-}
-
 /*
  * Make an inode pointer out of the buffer/offset.
  */
@@ -96,13 +86,6 @@ xfs_imap(
 	uint		flags);		/* flags for inode btree lookup */
 
 /*
- * Compute and fill in value of m_in_maxlevels.
- */
-void
-xfs_ialloc_compute_maxlevels(
-	struct xfs_mount *mp);		/* file system mount structure */
-
-/*
  * Log specified fields for the ag hdr (inode section)
  */
 void
@@ -168,5 +151,6 @@ int xfs_inobt_insert_rec(struct xfs_btree_cur *cur, uint16_t holemask,
 		int *stat);
 
 int xfs_ialloc_cluster_alignment(struct xfs_mount *mp);
+void xfs_ialloc_setup_geometry(struct xfs_mount *mp);
 
 #endif	/* __XFS_IALLOC_H__ */
diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.c b/fs/xfs/libxfs/xfs_ialloc_btree.c
index 9b25e7a0df47..b82992f795aa 100644
--- a/fs/xfs/libxfs/xfs_ialloc_btree.c
+++ b/fs/xfs/libxfs/xfs_ialloc_btree.c
@@ -11,14 +11,12 @@
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
 #include "xfs_mount.h"
-#include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_ialloc.h"
 #include "xfs_ialloc_btree.h"
 #include "xfs_alloc.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_trans.h"
 #include "xfs_rmap.h"
 
@@ -28,7 +26,7 @@ xfs_inobt_get_minrecs(
 	struct xfs_btree_cur	*cur,
 	int			level)
 {
-	return cur->bc_mp->m_inobt_mnr[level != 0];
+	return M_IGEO(cur->bc_mp)->inobt_mnr[level != 0];
 }
 
 STATIC struct xfs_btree_cur *
@@ -124,7 +122,7 @@ xfs_finobt_alloc_block(
 	union xfs_btree_ptr	*new,
 	int			*stat)
 {
-	if (cur->bc_mp->m_inotbt_nores)
+	if (cur->bc_mp->m_finobt_nores)
 		return xfs_inobt_alloc_block(cur, start, new, stat);
 	return __xfs_inobt_alloc_block(cur, start, new, stat,
 			XFS_AG_RESV_METADATA);
@@ -154,7 +152,7 @@ xfs_finobt_free_block(
 	struct xfs_btree_cur	*cur,
 	struct xfs_buf		*bp)
 {
-	if (cur->bc_mp->m_inotbt_nores)
+	if (cur->bc_mp->m_finobt_nores)
 		return xfs_inobt_free_block(cur, bp);
 	return __xfs_inobt_free_block(cur, bp, XFS_AG_RESV_METADATA);
 }
@@ -164,7 +162,7 @@ xfs_inobt_get_maxrecs(
 	struct xfs_btree_cur	*cur,
 	int			level)
 {
-	return cur->bc_mp->m_inobt_mxr[level != 0];
+	return M_IGEO(cur->bc_mp)->inobt_mxr[level != 0];
 }
 
 STATIC void
@@ -255,11 +253,14 @@ static xfs_failaddr_t
 xfs_inobt_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	xfs_failaddr_t		fa;
 	unsigned int		level;
 
+	if (!xfs_verify_magic(bp, block->bb_magic))
+		return __this_address;
+
 	/*
 	 * During growfs operations, we can't verify the exact owner as the
 	 * perag is not fully initialised and hence not attached to the buffer.
@@ -270,26 +271,19 @@ xfs_inobt_verify(
 	 * but beware of the landmine (i.e. need to check pag->pagi_init) if we
 	 * ever do.
 	 */
-	switch (block->bb_magic) {
-	case cpu_to_be32(XFS_IBT_CRC_MAGIC):
-	case cpu_to_be32(XFS_FIBT_CRC_MAGIC):
+	if (xfs_sb_version_hascrc(&mp->m_sb)) {
 		fa = xfs_btree_sblock_v5hdr_verify(bp);
 		if (fa)
 			return fa;
-		/* fall through */
-	case cpu_to_be32(XFS_IBT_MAGIC):
-	case cpu_to_be32(XFS_FIBT_MAGIC):
-		break;
-	default:
-		return __this_address;
 	}
 
 	/* level verification */
 	level = be16_to_cpu(block->bb_level);
-	if (level >= mp->m_in_maxlevels)
+	if (level >= M_IGEO(mp)->inobt_maxlevels)
 		return __this_address;
 
-	return xfs_btree_sblock_verify(bp, mp->m_inobt_mxr[level != 0]);
+	return xfs_btree_sblock_verify(bp,
+			M_IGEO(mp)->inobt_mxr[level != 0]);
 }
 
 static void
@@ -328,6 +322,16 @@ xfs_inobt_write_verify(
 
 const struct xfs_buf_ops xfs_inobt_buf_ops = {
 	.name = "xfs_inobt",
+	.magic = { cpu_to_be32(XFS_IBT_MAGIC), cpu_to_be32(XFS_IBT_CRC_MAGIC) },
+	.verify_read = xfs_inobt_read_verify,
+	.verify_write = xfs_inobt_write_verify,
+	.verify_struct = xfs_inobt_verify,
+};
+
+const struct xfs_buf_ops xfs_finobt_buf_ops = {
+	.name = "xfs_finobt",
+	.magic = { cpu_to_be32(XFS_FIBT_MAGIC),
+		   cpu_to_be32(XFS_FIBT_CRC_MAGIC) },
 	.verify_read = xfs_inobt_read_verify,
 	.verify_write = xfs_inobt_write_verify,
 	.verify_struct = xfs_inobt_verify,
@@ -389,7 +393,7 @@ static const struct xfs_btree_ops xfs_finobt_ops = {
 	.init_rec_from_cur	= xfs_inobt_init_rec_from_cur,
 	.init_ptr_from_cur	= xfs_finobt_init_ptr_from_cur,
 	.key_diff		= xfs_inobt_key_diff,
-	.buf_ops		= &xfs_inobt_buf_ops,
+	.buf_ops		= &xfs_finobt_buf_ops,
 	.diff_two_keys		= xfs_inobt_diff_two_keys,
 	.keys_inorder		= xfs_inobt_keys_inorder,
 	.recs_inorder		= xfs_inobt_recs_inorder,
@@ -541,14 +545,53 @@ xfs_inobt_max_size(
 	xfs_agblock_t		agblocks = xfs_ag_block_count(mp, agno);
 
 	/* Bail out if we're uninitialized, which can happen in mkfs. */
-	if (mp->m_inobt_mxr[0] == 0)
+	if (M_IGEO(mp)->inobt_mxr[0] == 0)
 		return 0;
 
-	return xfs_btree_calc_size(mp->m_inobt_mnr,
+	/*
+	 * The log is permanently allocated, so the space it occupies will
+	 * never be available for the kinds of things that would require btree
+	 * expansion.  We therefore can pretend the space isn't there.
+	 */
+	if (mp->m_sb.sb_logstart &&
+	    XFS_FSB_TO_AGNO(mp, mp->m_sb.sb_logstart) == agno)
+		agblocks -= mp->m_sb.sb_logblocks;
+
+	return xfs_btree_calc_size(M_IGEO(mp)->inobt_mnr,
 				(uint64_t)agblocks * mp->m_sb.sb_inopblock /
 					XFS_INODES_PER_CHUNK);
 }
 
+/* Read AGI and create inobt cursor. */
+int
+xfs_inobt_cur(
+	struct xfs_mount	*mp,
+	struct xfs_trans	*tp,
+	xfs_agnumber_t		agno,
+	xfs_btnum_t		which,
+	struct xfs_btree_cur	**curpp,
+	struct xfs_buf		**agi_bpp)
+{
+	struct xfs_btree_cur	*cur;
+	int			error;
+
+	ASSERT(*agi_bpp == NULL);
+	ASSERT(*curpp == NULL);
+
+	error = xfs_ialloc_read_agi(mp, tp, agno, agi_bpp);
+	if (error)
+		return error;
+
+	cur = xfs_inobt_init_cursor(mp, tp, *agi_bpp, agno, which);
+	if (!cur) {
+		xfs_trans_brelse(tp, *agi_bpp);
+		*agi_bpp = NULL;
+		return -ENOMEM;
+	}
+	*curpp = cur;
+	return 0;
+}
+
 static int
 xfs_inobt_count_blocks(
 	struct xfs_mount	*mp,
@@ -557,15 +600,14 @@ xfs_inobt_count_blocks(
 	xfs_btnum_t		btnum,
 	xfs_extlen_t		*tree_blocks)
 {
-	struct xfs_buf		*agbp;
-	struct xfs_btree_cur	*cur;
+	struct xfs_buf		*agbp = NULL;
+	struct xfs_btree_cur	*cur = NULL;
 	int			error;
 
-	error = xfs_ialloc_read_agi(mp, tp, agno, &agbp);
+	error = xfs_inobt_cur(mp, tp, agno, btnum, &cur, &agbp);
 	if (error)
 		return error;
 
-	cur = xfs_inobt_init_cursor(mp, tp, agbp, agno, btnum);
 	error = xfs_btree_count_blocks(cur, tree_blocks);
 	xfs_btree_del_cursor(cur, error);
 	xfs_trans_brelse(tp, agbp);
@@ -605,5 +647,5 @@ xfs_iallocbt_calc_size(
 	struct xfs_mount	*mp,
 	unsigned long long	len)
 {
-	return xfs_btree_calc_size(mp->m_inobt_mnr, len);
+	return xfs_btree_calc_size(M_IGEO(mp)->inobt_mnr, len);
 }
diff --git a/fs/xfs/libxfs/xfs_ialloc_btree.h b/fs/xfs/libxfs/xfs_ialloc_btree.h
index ebdd0c6b8766..951305ecaae1 100644
--- a/fs/xfs/libxfs/xfs_ialloc_btree.h
+++ b/fs/xfs/libxfs/xfs_ialloc_btree.h
@@ -64,5 +64,8 @@ int xfs_finobt_calc_reserves(struct xfs_mount *mp, struct xfs_trans *tp,
 		xfs_agnumber_t agno, xfs_extlen_t *ask, xfs_extlen_t *used);
 extern xfs_extlen_t xfs_iallocbt_calc_size(struct xfs_mount *mp,
 		unsigned long long len);
+int xfs_inobt_cur(struct xfs_mount *mp, struct xfs_trans *tp,
+		xfs_agnumber_t agno, xfs_btnum_t btnum,
+		struct xfs_btree_cur **curpp, struct xfs_buf **agi_bpp);
 
 #endif	/* __XFS_IALLOC_BTREE_H__ */
diff --git a/fs/xfs/libxfs/xfs_iext_tree.c b/fs/xfs/libxfs/xfs_iext_tree.c
index 771dd072015d..27aa3f2bc4bc 100644
--- a/fs/xfs/libxfs/xfs_iext_tree.c
+++ b/fs/xfs/libxfs/xfs_iext_tree.c
@@ -3,18 +3,14 @@
  * Copyright (c) 2017 Christoph Hellwig.
  */
 
-#include <linux/cache.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
 #include "xfs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_inode.h"
-#include "xfs_inode_fork.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_bmap.h"
 #include "xfs_trace.h"
 
 /*
@@ -614,16 +610,15 @@ xfs_iext_realloc_root(
 }
 
 /*
- * Increment the sequence counter if we are on a COW fork.  This allows
- * the writeback code to skip looking for a COW extent if the COW fork
- * hasn't changed.  We use WRITE_ONCE here to ensure the update to the
- * sequence counter is seen before the modifications to the extent
- * tree itself take effect.
+ * Increment the sequence counter on extent tree changes. If we are on a COW
+ * fork, this allows the writeback code to skip looking for a COW extent if the
+ * COW fork hasn't changed. We use WRITE_ONCE here to ensure the update to the
+ * sequence counter is seen before the modifications to the extent tree itself
+ * take effect.
  */
 static inline void xfs_iext_inc_seq(struct xfs_ifork *ifp, int state)
 {
-	if (state & BMAP_COWFORK)
-		WRITE_ONCE(ifp->if_seq, READ_ONCE(ifp->if_seq) + 1);
+	WRITE_ONCE(ifp->if_seq, READ_ONCE(ifp->if_seq) + 1);
 }
 
 void
diff --git a/fs/xfs/libxfs/xfs_inode_buf.c b/fs/xfs/libxfs/xfs_inode_buf.c
index 09d9c8cfa4a0..28ab3c5255e1 100644
--- a/fs/xfs/libxfs/xfs_inode_buf.c
+++ b/fs/xfs/libxfs/xfs_inode_buf.c
@@ -10,11 +10,9 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"
-#include "xfs_cksum.h"
 #include "xfs_icache.h"
 #include "xfs_trans.h"
 #include "xfs_ialloc.h"
@@ -33,12 +31,9 @@ xfs_inobp_check(
 	xfs_buf_t	*bp)
 {
 	int		i;
-	int		j;
 	xfs_dinode_t	*dip;
 
-	j = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog;
-
-	for (i = 0; i < j; i++) {
+	for (i = 0; i < M_IGEO(mp)->inodes_per_cluster; i++) {
 		dip = xfs_buf_offset(bp, i * mp->m_sb.sb_inodesize);
 		if (!dip->di_next_unlinked)  {
 			xfs_alert(mp,
@@ -80,7 +75,7 @@ xfs_inode_buf_verify(
 	struct xfs_buf	*bp,
 	bool		readahead)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	xfs_agnumber_t	agno;
 	int		i;
 	int		ni;
@@ -97,10 +92,9 @@ xfs_inode_buf_verify(
 
 		dip = xfs_buf_offset(bp, (i << mp->m_sb.sb_inodelog));
 		unlinked_ino = be32_to_cpu(dip->di_next_unlinked);
-		di_ok = dip->di_magic == cpu_to_be16(XFS_DINODE_MAGIC) &&
+		di_ok = xfs_verify_magic16(bp, dip->di_magic) &&
 			xfs_dinode_good_version(mp, dip->di_version) &&
-			(unlinked_ino == NULLAGINO ||
-			 xfs_verify_agino(mp, agno, unlinked_ino));
+			xfs_verify_agino_or_null(mp, agno, unlinked_ino);
 		if (unlikely(XFS_TEST_ERROR(!di_ok, mp,
 						XFS_ERRTAG_ITOBP_INOTOBP))) {
 			if (readahead) {
@@ -147,12 +141,16 @@ xfs_inode_buf_write_verify(
 
 const struct xfs_buf_ops xfs_inode_buf_ops = {
 	.name = "xfs_inode",
+	.magic16 = { cpu_to_be16(XFS_DINODE_MAGIC),
+		     cpu_to_be16(XFS_DINODE_MAGIC) },
 	.verify_read = xfs_inode_buf_read_verify,
 	.verify_write = xfs_inode_buf_write_verify,
 };
 
 const struct xfs_buf_ops xfs_inode_buf_ra_ops = {
-	.name = "xxfs_inode_ra",
+	.name = "xfs_inode_ra",
+	.magic16 = { cpu_to_be16(XFS_DINODE_MAGIC),
+		     cpu_to_be16(XFS_DINODE_MAGIC) },
 	.verify_read = xfs_inode_buf_readahead_verify,
 	.verify_write = xfs_inode_buf_write_verify,
 };
diff --git a/fs/xfs/libxfs/xfs_inode_fork.c b/fs/xfs/libxfs/xfs_inode_fork.c
index f9acf1d436f6..bf3e04018246 100644
--- a/fs/xfs/libxfs/xfs_inode_fork.c
+++ b/fs/xfs/libxfs/xfs_inode_fork.c
@@ -3,10 +3,10 @@
  * Copyright (c) 2000-2006 Silicon Graphics, Inc.
  * All Rights Reserved.
  */
-#include <linux/log2.h>
 
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
@@ -19,12 +19,10 @@
 #include "xfs_bmap.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_attr_sf.h"
 #include "xfs_da_format.h"
 #include "xfs_da_btree.h"
 #include "xfs_dir2_priv.h"
 #include "xfs_attr_leaf.h"
-#include "xfs_shared.h"
 
 kmem_zone_t *xfs_ifork_zone;
 
diff --git a/fs/xfs/libxfs/xfs_inode_fork.h b/fs/xfs/libxfs/xfs_inode_fork.h
index 60361d2d74a1..00c62ce170d0 100644
--- a/fs/xfs/libxfs/xfs_inode_fork.h
+++ b/fs/xfs/libxfs/xfs_inode_fork.h
@@ -14,7 +14,7 @@ struct xfs_dinode;
  */
 struct xfs_ifork {
 	int			if_bytes;	/* bytes in if_u1 */
-	unsigned int		if_seq;		/* cow fork mod counter */
+	unsigned int		if_seq;		/* fork mod counter */
 	struct xfs_btree_block	*if_broot;	/* file's incore btree root */
 	short			if_broot_bytes;	/* bytes allocated for root */
 	unsigned char		if_flags;	/* per-fork flags */
diff --git a/fs/xfs/libxfs/xfs_log_rlimit.c b/fs/xfs/libxfs/xfs_log_rlimit.c
index 1b542ec11d5d..7f55eb3f3653 100644
--- a/fs/xfs/libxfs/xfs_log_rlimit.c
+++ b/fs/xfs/libxfs/xfs_log_rlimit.c
@@ -12,9 +12,7 @@
 #include "xfs_mount.h"
 #include "xfs_da_format.h"
 #include "xfs_trans_space.h"
-#include "xfs_inode.h"
 #include "xfs_da_btree.h"
-#include "xfs_attr_leaf.h"
 #include "xfs_bmap_btree.h"
 
 /*
diff --git a/fs/xfs/libxfs/xfs_quota_defs.h b/fs/xfs/libxfs/xfs_quota_defs.h
index 4bfdd5f4c6af..b2113b17e53c 100644
--- a/fs/xfs/libxfs/xfs_quota_defs.h
+++ b/fs/xfs/libxfs/xfs_quota_defs.h
@@ -142,7 +142,7 @@ extern xfs_failaddr_t xfs_dquot_verify(struct xfs_mount *mp,
 extern xfs_failaddr_t xfs_dqblk_verify(struct xfs_mount *mp,
 		struct xfs_dqblk *dqb, xfs_dqid_t id, uint type);
 extern int xfs_calc_dquots_per_chunk(unsigned int nbblks);
-extern int xfs_dqblk_repair(struct xfs_mount *mp, struct xfs_dqblk *dqb,
+extern void xfs_dqblk_repair(struct xfs_mount *mp, struct xfs_dqblk *dqb,
 		xfs_dqid_t id, uint type);
 
 #endif	/* __XFS_QUOTA_H__ */
diff --git a/fs/xfs/libxfs/xfs_refcount.c b/fs/xfs/libxfs/xfs_refcount.c
index 542aa1475b5f..51bb9bdb0e84 100644
--- a/fs/xfs/libxfs/xfs_refcount.c
+++ b/fs/xfs/libxfs/xfs_refcount.c
@@ -9,7 +9,6 @@
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
 #include "xfs_btree.h"
@@ -19,7 +18,6 @@
 #include "xfs_errortag.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_trans.h"
 #include "xfs_bit.h"
 #include "xfs_refcount.h"
diff --git a/fs/xfs/libxfs/xfs_refcount_btree.c b/fs/xfs/libxfs/xfs_refcount_btree.c
index d9eab657b63e..38529dbacd55 100644
--- a/fs/xfs/libxfs/xfs_refcount_btree.c
+++ b/fs/xfs/libxfs/xfs_refcount_btree.c
@@ -12,12 +12,10 @@
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_btree.h"
-#include "xfs_bmap.h"
 #include "xfs_refcount_btree.h"
 #include "xfs_alloc.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_trans.h"
 #include "xfs_bit.h"
 #include "xfs_rmap.h"
@@ -203,13 +201,13 @@ STATIC xfs_failaddr_t
 xfs_refcountbt_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	struct xfs_perag	*pag = bp->b_pag;
 	xfs_failaddr_t		fa;
 	unsigned int		level;
 
-	if (block->bb_magic != cpu_to_be32(XFS_REFC_CRC_MAGIC))
+	if (!xfs_verify_magic(bp, block->bb_magic))
 		return __this_address;
 
 	if (!xfs_sb_version_hasreflink(&mp->m_sb))
@@ -264,6 +262,7 @@ xfs_refcountbt_write_verify(
 
 const struct xfs_buf_ops xfs_refcountbt_buf_ops = {
 	.name			= "xfs_refcountbt",
+	.magic			= { 0, cpu_to_be32(XFS_REFC_CRC_MAGIC) },
 	.verify_read		= xfs_refcountbt_read_verify,
 	.verify_write		= xfs_refcountbt_write_verify,
 	.verify_struct		= xfs_refcountbt_verify,
@@ -426,6 +425,15 @@ xfs_refcountbt_calc_reserves(
 	tree_len = be32_to_cpu(agf->agf_refcount_blocks);
 	xfs_trans_brelse(tp, agbp);
 
+	/*
+	 * The log is permanently allocated, so the space it occupies will
+	 * never be available for the kinds of things that would require btree
+	 * expansion.  We therefore can pretend the space isn't there.
+	 */
+	if (mp->m_sb.sb_logstart &&
+	    XFS_FSB_TO_AGNO(mp, mp->m_sb.sb_logstart) == agno)
+		agblocks -= mp->m_sb.sb_logblocks;
+
 	*ask += xfs_refcountbt_max_size(mp, agblocks);
 	*used += tree_len;
 
diff --git a/fs/xfs/libxfs/xfs_rmap.c b/fs/xfs/libxfs/xfs_rmap.c
index 8ed885507dd8..e6aeb390b2fb 100644
--- a/fs/xfs/libxfs/xfs_rmap.c
+++ b/fs/xfs/libxfs/xfs_rmap.c
@@ -10,24 +10,17 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_btree.h"
 #include "xfs_trans.h"
 #include "xfs_alloc.h"
 #include "xfs_rmap.h"
 #include "xfs_rmap_btree.h"
-#include "xfs_trans_space.h"
 #include "xfs_trace.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"
-#include "xfs_extent_busy.h"
-#include "xfs_bmap.h"
 #include "xfs_inode.h"
-#include "xfs_ialloc.h"
 
 /*
  * Lookup the first record less than or equal to [bno, len, owner, offset]
diff --git a/fs/xfs/libxfs/xfs_rmap_btree.c b/fs/xfs/libxfs/xfs_rmap_btree.c
index f79cf040d745..fc78efa52c94 100644
--- a/fs/xfs/libxfs/xfs_rmap_btree.c
+++ b/fs/xfs/libxfs/xfs_rmap_btree.c
@@ -9,18 +9,14 @@
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_bit.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_inode.h"
 #include "xfs_trans.h"
 #include "xfs_alloc.h"
 #include "xfs_btree.h"
 #include "xfs_rmap.h"
 #include "xfs_rmap_btree.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_error.h"
 #include "xfs_extent_busy.h"
 #include "xfs_ag_resv.h"
@@ -292,7 +288,7 @@ static xfs_failaddr_t
 xfs_rmapbt_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_btree_block	*block = XFS_BUF_TO_BLOCK(bp);
 	struct xfs_perag	*pag = bp->b_pag;
 	xfs_failaddr_t		fa;
@@ -310,7 +306,7 @@ xfs_rmapbt_verify(
 	 * from the on disk AGF. Again, we can only check against maximum limits
 	 * in this case.
 	 */
-	if (block->bb_magic != cpu_to_be32(XFS_RMAP_CRC_MAGIC))
+	if (!xfs_verify_magic(bp, block->bb_magic))
 		return __this_address;
 
 	if (!xfs_sb_version_hasrmapbt(&mp->m_sb))
@@ -365,6 +361,7 @@ xfs_rmapbt_write_verify(
 
 const struct xfs_buf_ops xfs_rmapbt_buf_ops = {
 	.name			= "xfs_rmapbt",
+	.magic			= { 0, cpu_to_be32(XFS_RMAP_CRC_MAGIC) },
 	.verify_read		= xfs_rmapbt_read_verify,
 	.verify_write		= xfs_rmapbt_write_verify,
 	.verify_struct		= xfs_rmapbt_verify,
@@ -577,6 +574,15 @@ xfs_rmapbt_calc_reserves(
 	tree_len = be32_to_cpu(agf->agf_rmap_blocks);
 	xfs_trans_brelse(tp, agbp);
 
+	/*
+	 * The log is permanently allocated, so the space it occupies will
+	 * never be available for the kinds of things that would require btree
+	 * expansion.  We therefore can pretend the space isn't there.
+	 */
+	if (mp->m_sb.sb_logstart &&
+	    XFS_FSB_TO_AGNO(mp, mp->m_sb.sb_logstart) == agno)
+		agblocks -= mp->m_sb.sb_logblocks;
+
 	/* Reserve 1% of the AG or enough for 1 block per record. */
 	*ask += max(agblocks / 100, xfs_rmapbt_max_size(mp, agblocks));
 	*used += tree_len;
diff --git a/fs/xfs/libxfs/xfs_rtbitmap.c b/fs/xfs/libxfs/xfs_rtbitmap.c
index eaaff67e9626..8ea1efc97b41 100644
--- a/fs/xfs/libxfs/xfs_rtbitmap.c
+++ b/fs/xfs/libxfs/xfs_rtbitmap.c
@@ -13,15 +13,7 @@
 #include "xfs_mount.h"
 #include "xfs_inode.h"
 #include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_alloc.h"
-#include "xfs_error.h"
 #include "xfs_trans.h"
-#include "xfs_trans_space.h"
-#include "xfs_trace.h"
-#include "xfs_buf.h"
-#include "xfs_icache.h"
 #include "xfs_rtalloc.h"
 
 
diff --git a/fs/xfs/libxfs/xfs_sb.c b/fs/xfs/libxfs/xfs_sb.c
index b5a82acd7dfe..a08dd8f40346 100644
--- a/fs/xfs/libxfs/xfs_sb.c
+++ b/fs/xfs/libxfs/xfs_sb.c
@@ -10,26 +10,20 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_inode.h"
 #include "xfs_ialloc.h"
 #include "xfs_alloc.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_cksum.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_bmap_btree.h"
 #include "xfs_alloc_btree.h"
-#include "xfs_ialloc_btree.h"
 #include "xfs_log.h"
 #include "xfs_rmap_btree.h"
-#include "xfs_bmap.h"
 #include "xfs_refcount_btree.h"
 #include "xfs_da_format.h"
-#include "xfs_da_btree.h"
+#include "xfs_health.h"
 
 /*
  * Physical superblock buffer manipulations. Shared with libxfs in userspace.
@@ -225,10 +219,11 @@ xfs_validate_sb_common(
 	struct xfs_buf		*bp,
 	struct xfs_sb		*sbp)
 {
+	struct xfs_dsb		*dsb = XFS_BUF_TO_SBP(bp);
 	uint32_t		agcount = 0;
 	uint32_t		rem;
 
-	if (sbp->sb_magicnum != XFS_SB_MAGIC) {
+	if (!xfs_verify_magic(bp, dsb->sb_magicnum)) {
 		xfs_warn(mp, "bad magic number");
 		return -EWRONGFS;
 	}
@@ -684,7 +679,7 @@ xfs_sb_read_verify(
 	struct xfs_buf		*bp)
 {
 	struct xfs_sb		sb;
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_dsb		*dsb = XFS_BUF_TO_SBP(bp);
 	int			error;
 
@@ -750,7 +745,7 @@ xfs_sb_write_verify(
 	struct xfs_buf		*bp)
 {
 	struct xfs_sb		sb;
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	int			error;
 
@@ -781,12 +776,14 @@ out_error:
 
 const struct xfs_buf_ops xfs_sb_buf_ops = {
 	.name = "xfs_sb",
+	.magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
 	.verify_read = xfs_sb_read_verify,
 	.verify_write = xfs_sb_write_verify,
 };
 
 const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
 	.name = "xfs_sb_quiet",
+	.magic = { cpu_to_be32(XFS_SB_MAGIC), cpu_to_be32(XFS_SB_MAGIC) },
 	.verify_read = xfs_sb_quiet_read_verify,
 	.verify_write = xfs_sb_write_verify,
 };
@@ -796,12 +793,14 @@ const struct xfs_buf_ops xfs_sb_quiet_buf_ops = {
  *
  * Mount initialization code establishing various mount
  * fields from the superblock associated with the given
- * mount structure
+ * mount structure.
+ *
+ * Inode geometry are calculated in xfs_ialloc_setup_geometry.
  */
 void
 xfs_sb_mount_common(
-	struct xfs_mount *mp,
-	struct xfs_sb	*sbp)
+	struct xfs_mount	*mp,
+	struct xfs_sb		*sbp)
 {
 	mp->m_agfrotor = mp->m_agirotor = 0;
 	mp->m_maxagi = mp->m_sb.sb_agcount;
@@ -809,7 +808,6 @@ xfs_sb_mount_common(
 	mp->m_blkbb_log = sbp->sb_blocklog - BBSHIFT;
 	mp->m_sectbb_log = sbp->sb_sectlog - BBSHIFT;
 	mp->m_agno_log = xfs_highbit32(sbp->sb_agcount - 1) + 1;
-	mp->m_agino_log = sbp->sb_inopblog + sbp->sb_agblklog;
 	mp->m_blockmask = sbp->sb_blocksize - 1;
 	mp->m_blockwsize = sbp->sb_blocksize >> XFS_WORDLOG;
 	mp->m_blockwmask = mp->m_blockwsize - 1;
@@ -819,11 +817,6 @@ xfs_sb_mount_common(
 	mp->m_alloc_mnr[0] = mp->m_alloc_mxr[0] / 2;
 	mp->m_alloc_mnr[1] = mp->m_alloc_mxr[1] / 2;
 
-	mp->m_inobt_mxr[0] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 1);
-	mp->m_inobt_mxr[1] = xfs_inobt_maxrecs(mp, sbp->sb_blocksize, 0);
-	mp->m_inobt_mnr[0] = mp->m_inobt_mxr[0] / 2;
-	mp->m_inobt_mnr[1] = mp->m_inobt_mxr[1] / 2;
-
 	mp->m_bmap_dmxr[0] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 1);
 	mp->m_bmap_dmxr[1] = xfs_bmbt_maxrecs(mp, sbp->sb_blocksize, 0);
 	mp->m_bmap_dmnr[0] = mp->m_bmap_dmxr[0] / 2;
@@ -840,14 +833,6 @@ xfs_sb_mount_common(
 	mp->m_refc_mnr[1] = mp->m_refc_mxr[1] / 2;
 
 	mp->m_bsize = XFS_FSB_TO_BB(mp, 1);
-	mp->m_ialloc_inos = max_t(uint16_t, XFS_INODES_PER_CHUNK,
-					sbp->sb_inopblock);
-	mp->m_ialloc_blks = mp->m_ialloc_inos >> sbp->sb_inopblog;
-
-	if (sbp->sb_spino_align)
-		mp->m_ialloc_min_blks = sbp->sb_spino_align;
-	else
-		mp->m_ialloc_min_blks = mp->m_ialloc_blks;
 	mp->m_alloc_set_aside = xfs_alloc_set_aside(mp);
 	mp->m_ag_max_usable = xfs_alloc_ag_max_usable(mp);
 }
@@ -874,7 +859,7 @@ xfs_initialize_perag_data(
 	uint64_t	bfreelst = 0;
 	uint64_t	btree = 0;
 	uint64_t	fdblocks;
-	int		error;
+	int		error = 0;
 
 	for (index = 0; index < agcount; index++) {
 		/*
@@ -902,7 +887,7 @@ xfs_initialize_perag_data(
 	/*
 	 * If the new summary counts are obviously incorrect, fail the
 	 * mount operation because that implies the AGFs are also corrupt.
-	 * Clear BAD_SUMMARY so that we don't unmount with a dirty log, which
+	 * Clear FS_COUNTERS so that we don't unmount with a dirty log, which
 	 * will prevent xfs_repair from fixing anything.
 	 */
 	if (fdblocks > sbp->sb_dblocks || ifree > ialloc) {
@@ -920,7 +905,7 @@ xfs_initialize_perag_data(
 
 	xfs_reinit_percpu_counters(mp);
 out:
-	mp->m_flags &= ~XFS_MOUNT_BAD_SUMMARY;
+	xfs_fs_mark_healthy(mp, XFS_SICK_FS_COUNTERS);
 	return error;
 }
 
@@ -935,7 +920,7 @@ xfs_log_sb(
 	struct xfs_trans	*tp)
 {
 	struct xfs_mount	*mp = tp->t_mountp;
-	struct xfs_buf		*bp = xfs_trans_getsb(tp, mp, 0);
+	struct xfs_buf		*bp = xfs_trans_getsb(tp, mp);
 
 	mp->m_sb.sb_icount = percpu_counter_sum(&mp->m_icount);
 	mp->m_sb.sb_ifree = percpu_counter_sum(&mp->m_ifree);
@@ -1001,7 +986,7 @@ xfs_update_secondary_sbs(
 
 		bp = xfs_buf_get(mp->m_ddev_targp,
 				 XFS_AG_DADDR(mp, agno, XFS_SB_DADDR),
-				 XFS_FSS_TO_BB(mp, 1), 0);
+				 XFS_FSS_TO_BB(mp, 1));
 		/*
 		 * If we get an error reading or writing alternate superblocks,
 		 * continue.  xfs_repair chooses the "best" superblock based
@@ -1065,7 +1050,7 @@ xfs_sync_sb_buf(
 	if (error)
 		return error;
 
-	bp = xfs_trans_getsb(tp, mp, 0);
+	bp = xfs_trans_getsb(tp, mp);
 	xfs_log_sb(tp);
 	xfs_trans_bhold(tp, bp);
 	xfs_trans_set_sync(tp);
@@ -1081,7 +1066,7 @@ out:
 	return error;
 }
 
-int
+void
 xfs_fs_geometry(
 	struct xfs_sb		*sbp,
 	struct xfs_fsop_geom	*geo,
@@ -1105,13 +1090,13 @@ xfs_fs_geometry(
 	memcpy(geo->uuid, &sbp->sb_uuid, sizeof(sbp->sb_uuid));
 
 	if (struct_version < 2)
-		return 0;
+		return;
 
 	geo->sunit = sbp->sb_unit;
 	geo->swidth = sbp->sb_width;
 
 	if (struct_version < 3)
-		return 0;
+		return;
 
 	geo->version = XFS_FSOP_GEOM_VERSION;
 	geo->flags = XFS_FSOP_GEOM_FLAGS_NLINK |
@@ -1155,14 +1140,17 @@ xfs_fs_geometry(
 	geo->dirblocksize = xfs_dir2_dirblock_bytes(sbp);
 
 	if (struct_version < 4)
-		return 0;
+		return;
 
 	if (xfs_sb_version_haslogv2(sbp))
 		geo->flags |= XFS_FSOP_GEOM_FLAGS_LOGV2;
 
 	geo->logsunit = sbp->sb_logsunit;
 
-	return 0;
+	if (struct_version < 5)
+		return;
+
+	geo->version = XFS_FSOP_GEOM_VERSION_V5;
 }
 
 /* Read a secondary superblock. */
diff --git a/fs/xfs/libxfs/xfs_sb.h b/fs/xfs/libxfs/xfs_sb.h
index 13564d69800a..92465a9a5162 100644
--- a/fs/xfs/libxfs/xfs_sb.h
+++ b/fs/xfs/libxfs/xfs_sb.h
@@ -33,7 +33,7 @@ extern void	xfs_sb_quota_from_disk(struct xfs_sb *sbp);
 extern int	xfs_update_secondary_sbs(struct xfs_mount *mp);
 
 #define XFS_FS_GEOM_MAX_STRUCT_VER	(4)
-extern int	xfs_fs_geometry(struct xfs_sb *sbp, struct xfs_fsop_geom *geo,
+extern void	xfs_fs_geometry(struct xfs_sb *sbp, struct xfs_fsop_geom *geo,
 				int struct_version);
 extern int	xfs_sb_read_secondary(struct xfs_mount *mp,
 				struct xfs_trans *tp, xfs_agnumber_t agno,
diff --git a/fs/xfs/libxfs/xfs_shared.h b/fs/xfs/libxfs/xfs_shared.h
index 1c5debe748f0..e0641b7337b3 100644
--- a/fs/xfs/libxfs/xfs_shared.h
+++ b/fs/xfs/libxfs/xfs_shared.h
@@ -25,7 +25,8 @@ extern const struct xfs_buf_ops xfs_agf_buf_ops;
 extern const struct xfs_buf_ops xfs_agi_buf_ops;
 extern const struct xfs_buf_ops xfs_agf_buf_ops;
 extern const struct xfs_buf_ops xfs_agfl_buf_ops;
-extern const struct xfs_buf_ops xfs_allocbt_buf_ops;
+extern const struct xfs_buf_ops xfs_bnobt_buf_ops;
+extern const struct xfs_buf_ops xfs_cntbt_buf_ops;
 extern const struct xfs_buf_ops xfs_rmapbt_buf_ops;
 extern const struct xfs_buf_ops xfs_refcountbt_buf_ops;
 extern const struct xfs_buf_ops xfs_attr3_leaf_buf_ops;
@@ -36,6 +37,7 @@ extern const struct xfs_buf_ops xfs_dquot_buf_ops;
 extern const struct xfs_buf_ops xfs_symlink_buf_ops;
 extern const struct xfs_buf_ops xfs_agi_buf_ops;
 extern const struct xfs_buf_ops xfs_inobt_buf_ops;
+extern const struct xfs_buf_ops xfs_finobt_buf_ops;
 extern const struct xfs_buf_ops xfs_inode_buf_ops;
 extern const struct xfs_buf_ops xfs_inode_buf_ra_ops;
 extern const struct xfs_buf_ops xfs_dquot_buf_ops;
@@ -63,7 +65,6 @@ void	xfs_log_get_max_trans_res(struct xfs_mount *mp,
 #define XFS_TRANS_DQ_DIRTY	0x10	/* at least one dquot in trx dirty */
 #define XFS_TRANS_RESERVE	0x20    /* OK to use reserved data blocks */
 #define XFS_TRANS_NO_WRITECOUNT 0x40	/* do not elevate SB writecount */
-#define XFS_TRANS_NOFS		0x80	/* pass KM_NOFS to kmem_alloc */
 /*
  * LOWMODE is used by the allocator to activate the lowspace algorithm - when
  * free space is running low the extent allocator may choose to allocate an
@@ -134,4 +135,52 @@ void xfs_symlink_local_to_remote(struct xfs_trans *tp, struct xfs_buf *bp,
 				 struct xfs_inode *ip, struct xfs_ifork *ifp);
 xfs_failaddr_t xfs_symlink_shortform_verify(struct xfs_inode *ip);
 
+/* Computed inode geometry for the filesystem. */
+struct xfs_ino_geometry {
+	/* Maximum inode count in this filesystem. */
+	uint64_t	maxicount;
+
+	/* Actual inode cluster buffer size, in bytes. */
+	unsigned int	inode_cluster_size;
+
+	/*
+	 * Desired inode cluster buffer size, in bytes.  This value is not
+	 * rounded up to at least one filesystem block, which is necessary for
+	 * the sole purpose of validating sb_spino_align.  Runtime code must
+	 * only ever use inode_cluster_size.
+	 */
+	unsigned int	inode_cluster_size_raw;
+
+	/* Inode cluster sizes, adjusted to be at least 1 fsb. */
+	unsigned int	inodes_per_cluster;
+	unsigned int	blocks_per_cluster;
+
+	/* Inode cluster alignment. */
+	unsigned int	cluster_align;
+	unsigned int	cluster_align_inodes;
+	unsigned int	inoalign_mask;	/* mask sb_inoalignmt if used */
+
+	unsigned int	inobt_mxr[2]; /* max inobt btree records */
+	unsigned int	inobt_mnr[2]; /* min inobt btree records */
+	unsigned int	inobt_maxlevels; /* max inobt btree levels. */
+
+	/* Size of inode allocations under normal operation. */
+	unsigned int	ialloc_inos;
+	unsigned int	ialloc_blks;
+
+	/* Minimum inode blocks for a sparse allocation. */
+	unsigned int	ialloc_min_blks;
+
+	/* stripe unit inode alignment */
+	unsigned int	ialloc_align;
+
+	unsigned int	agino_log;	/* #bits for agino in inum */
+};
+
+/* Keep iterating the data structure. */
+#define XFS_ITER_CONTINUE	(0)
+
+/* Stop iterating the data structure. */
+#define XFS_ITER_ABORT		(1)
+
 #endif /* __XFS_SHARED_H__ */
diff --git a/fs/xfs/libxfs/xfs_symlink_remote.c b/fs/xfs/libxfs/xfs_symlink_remote.c
index 77d80106f989..3b8260ca7d1b 100644
--- a/fs/xfs/libxfs/xfs_symlink_remote.c
+++ b/fs/xfs/libxfs/xfs_symlink_remote.c
@@ -11,12 +11,8 @@
 #include "xfs_shared.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_bmap_btree.h"
 #include "xfs_inode.h"
 #include "xfs_error.h"
-#include "xfs_trace.h"
-#include "xfs_symlink.h"
-#include "xfs_cksum.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_log.h"
@@ -90,12 +86,12 @@ static xfs_failaddr_t
 xfs_symlink_verify(
 	struct xfs_buf		*bp)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	struct xfs_dsymlink_hdr	*dsl = bp->b_addr;
 
 	if (!xfs_sb_version_hascrc(&mp->m_sb))
 		return __this_address;
-	if (dsl->sl_magic != cpu_to_be32(XFS_SYMLINK_MAGIC))
+	if (!xfs_verify_magic(bp, dsl->sl_magic))
 		return __this_address;
 	if (!uuid_equal(&dsl->sl_uuid, &mp->m_sb.sb_meta_uuid))
 		return __this_address;
@@ -116,7 +112,7 @@ static void
 xfs_symlink_read_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	xfs_failaddr_t	fa;
 
 	/* no verification of non-crc buffers */
@@ -136,7 +132,7 @@ static void
 xfs_symlink_write_verify(
 	struct xfs_buf	*bp)
 {
-	struct xfs_mount *mp = bp->b_target->bt_mount;
+	struct xfs_mount *mp = bp->b_mount;
 	struct xfs_buf_log_item	*bip = bp->b_log_item;
 	xfs_failaddr_t		fa;
 
@@ -159,6 +155,7 @@ xfs_symlink_write_verify(
 
 const struct xfs_buf_ops xfs_symlink_buf_ops = {
 	.name = "xfs_symlink",
+	.magic = { 0, cpu_to_be32(XFS_SYMLINK_MAGIC) },
 	.verify_read = xfs_symlink_read_verify,
 	.verify_write = xfs_symlink_write_verify,
 	.verify_struct = xfs_symlink_verify,
diff --git a/fs/xfs/libxfs/xfs_trans_resv.c b/fs/xfs/libxfs/xfs_trans_resv.c
index f99a7aefe418..d12bbd526e7c 100644
--- a/fs/xfs/libxfs/xfs_trans_resv.c
+++ b/fs/xfs/libxfs/xfs_trans_resv.c
@@ -15,12 +15,10 @@
 #include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_bmap_btree.h"
-#include "xfs_ialloc.h"
 #include "xfs_quota.h"
 #include "xfs_trans.h"
 #include "xfs_qm.h"
 #include "xfs_trans_space.h"
-#include "xfs_trace.h"
 
 #define _ALLOC	true
 #define _FREE	false
@@ -136,9 +134,10 @@ STATIC uint
 xfs_calc_inobt_res(
 	struct xfs_mount	*mp)
 {
-	return xfs_calc_buf_res(mp->m_in_maxlevels, XFS_FSB_TO_B(mp, 1)) +
-		xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1),
-				 XFS_FSB_TO_B(mp, 1));
+	return xfs_calc_buf_res(M_IGEO(mp)->inobt_maxlevels,
+			XFS_FSB_TO_B(mp, 1)) +
+				xfs_calc_buf_res(xfs_allocfree_log_count(mp, 1),
+			XFS_FSB_TO_B(mp, 1));
 }
 
 /*
@@ -167,7 +166,7 @@ xfs_calc_finobt_res(
  * includes:
  *
  * the allocation btrees: 2 trees * (max depth - 1) * block size
- * the inode chunk: m_ialloc_blks * N
+ * the inode chunk: m_ino_geo.ialloc_blks * N
  *
  * The size N of the inode chunk reservation depends on whether it is for
  * allocation or free and which type of create transaction is in use. An inode
@@ -193,7 +192,7 @@ xfs_calc_inode_chunk_res(
 		size = XFS_FSB_TO_B(mp, 1);
 	}
 
-	res += xfs_calc_buf_res(mp->m_ialloc_blks, size);
+	res += xfs_calc_buf_res(M_IGEO(mp)->ialloc_blks, size);
 	return res;
 }
 
@@ -307,7 +306,7 @@ xfs_calc_iunlink_remove_reservation(
 	struct xfs_mount        *mp)
 {
 	return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
-	       2 * max_t(uint, XFS_FSB_TO_B(mp, 1), mp->m_inode_cluster_size);
+	       2 * M_IGEO(mp)->inode_cluster_size;
 }
 
 /*
@@ -345,7 +344,7 @@ STATIC uint
 xfs_calc_iunlink_add_reservation(xfs_mount_t *mp)
 {
 	return xfs_calc_buf_res(1, mp->m_sb.sb_sectsize) +
-		max_t(uint, XFS_FSB_TO_B(mp, 1), mp->m_inode_cluster_size);
+			M_IGEO(mp)->inode_cluster_size;
 }
 
 /*
@@ -876,9 +875,13 @@ xfs_trans_resv_calc(
 	resp->tr_sb.tr_logres = xfs_calc_sb_reservation(mp);
 	resp->tr_sb.tr_logcount = XFS_DEFAULT_LOG_COUNT;
 
+	/* growdata requires permanent res; it can free space to the last AG */
+	resp->tr_growdata.tr_logres = xfs_calc_growdata_reservation(mp);
+	resp->tr_growdata.tr_logcount = XFS_DEFAULT_PERM_LOG_COUNT;
+	resp->tr_growdata.tr_logflags |= XFS_TRANS_PERM_LOG_RES;
+
 	/* The following transaction are logged in logical format */
 	resp->tr_ichange.tr_logres = xfs_calc_ichange_reservation(mp);
-	resp->tr_growdata.tr_logres = xfs_calc_growdata_reservation(mp);
 	resp->tr_fsyncts.tr_logres = xfs_calc_swrite_reservation(mp);
 	resp->tr_writeid.tr_logres = xfs_calc_writeid_reservation(mp);
 	resp->tr_attrsetrt.tr_logres = xfs_calc_attrsetrt_reservation(mp);
diff --git a/fs/xfs/libxfs/xfs_trans_space.h b/fs/xfs/libxfs/xfs_trans_space.h
index a62fb950bef1..88221c7a04cc 100644
--- a/fs/xfs/libxfs/xfs_trans_space.h
+++ b/fs/xfs/libxfs/xfs_trans_space.h
@@ -56,9 +56,9 @@
 #define	XFS_DIRREMOVE_SPACE_RES(mp)	\
 	XFS_DAREMOVE_SPACE_RES(mp, XFS_DATA_FORK)
 #define	XFS_IALLOC_SPACE_RES(mp)	\
-	((mp)->m_ialloc_blks + \
+	(M_IGEO(mp)->ialloc_blks + \
 	 (xfs_sb_version_hasfinobt(&mp->m_sb) ? 2 : 1 * \
-	  ((mp)->m_in_maxlevels - 1)))
+	  (M_IGEO(mp)->inobt_maxlevels - 1)))
 
 /*
  * Space reservation values for various transactions.
@@ -94,7 +94,8 @@
 #define	XFS_SYMLINK_SPACE_RES(mp,nl,b)	\
 	(XFS_IALLOC_SPACE_RES(mp) + XFS_DIRENTER_SPACE_RES(mp,nl) + (b))
 #define XFS_IFREE_SPACE_RES(mp)		\
-	(xfs_sb_version_hasfinobt(&mp->m_sb) ? (mp)->m_in_maxlevels : 0)
+	(xfs_sb_version_hasfinobt(&mp->m_sb) ? \
+			M_IGEO(mp)->inobt_maxlevels : 0)
 
 
 #endif	/* __XFS_TRANS_SPACE_H__ */
diff --git a/fs/xfs/libxfs/xfs_types.c b/fs/xfs/libxfs/xfs_types.c
index 3306fc42cfad..4f595546a639 100644
--- a/fs/xfs/libxfs/xfs_types.c
+++ b/fs/xfs/libxfs/xfs_types.c
@@ -7,19 +7,10 @@
 #include "xfs.h"
 #include "xfs_fs.h"
 #include "xfs_format.h"
-#include "xfs_log_format.h"
 #include "xfs_shared.h"
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_inode.h"
-#include "xfs_btree.h"
-#include "xfs_rmap.h"
-#include "xfs_alloc_btree.h"
-#include "xfs_alloc.h"
-#include "xfs_ialloc.h"
 
 /* Find the size of the AG, in blocks. */
 xfs_agblock_t
@@ -87,14 +78,14 @@ xfs_agino_range(
 	 * Calculate the first inode, which will be in the first
 	 * cluster-aligned block after the AGFL.
 	 */
-	bno = round_up(XFS_AGFL_BLOCK(mp) + 1, mp->m_cluster_align);
+	bno = round_up(XFS_AGFL_BLOCK(mp) + 1, M_IGEO(mp)->cluster_align);
 	*first = XFS_AGB_TO_AGINO(mp, bno);
 
 	/*
 	 * Calculate the last inode, which will be at the end of the
 	 * last (aligned) cluster that can be allocated in the AG.
 	 */
-	bno = round_down(eoag, mp->m_cluster_align);
+	bno = round_down(eoag, M_IGEO(mp)->cluster_align);
 	*last = XFS_AGB_TO_AGINO(mp, bno) - 1;
 }
 
@@ -116,6 +107,19 @@ xfs_verify_agino(
 }
 
 /*
+ * Verify that an AG inode number pointer neither points outside the AG
+ * nor points at static metadata, or is NULLAGINO.
+ */
+bool
+xfs_verify_agino_or_null(
+	struct xfs_mount	*mp,
+	xfs_agnumber_t		agno,
+	xfs_agino_t		agino)
+{
+	return agino == NULLAGINO || xfs_verify_agino(mp, agno, agino);
+}
+
+/*
  * Verify that an FS inode number pointer neither points outside the
  * filesystem nor points at static AG metadata.
  */
@@ -172,7 +176,7 @@ xfs_verify_rtbno(
 }
 
 /* Calculate the range of valid icount values. */
-static void
+void
 xfs_icount_range(
 	struct xfs_mount	*mp,
 	unsigned long long	*min,
@@ -204,3 +208,14 @@ xfs_verify_icount(
 	xfs_icount_range(mp, &min, &max);
 	return icount >= min && icount <= max;
 }
+
+/* Sanity-checking of dir/attr block offsets. */
+bool
+xfs_verify_dablk(
+	struct xfs_mount	*mp,
+	xfs_fileoff_t		dabno)
+{
+	xfs_dablk_t		max_dablk = -1U;
+
+	return dabno <= max_dablk;
+}
diff --git a/fs/xfs/libxfs/xfs_types.h b/fs/xfs/libxfs/xfs_types.h
index 8f02855a019a..802b34cd10fe 100644
--- a/fs/xfs/libxfs/xfs_types.h
+++ b/fs/xfs/libxfs/xfs_types.h
@@ -183,10 +183,15 @@ void xfs_agino_range(struct xfs_mount *mp, xfs_agnumber_t agno,
 		xfs_agino_t *first, xfs_agino_t *last);
 bool xfs_verify_agino(struct xfs_mount *mp, xfs_agnumber_t agno,
 		xfs_agino_t agino);
+bool xfs_verify_agino_or_null(struct xfs_mount *mp, xfs_agnumber_t agno,
+		xfs_agino_t agino);
 bool xfs_verify_ino(struct xfs_mount *mp, xfs_ino_t ino);
 bool xfs_internal_inum(struct xfs_mount *mp, xfs_ino_t ino);
 bool xfs_verify_dir_ino(struct xfs_mount *mp, xfs_ino_t ino);
 bool xfs_verify_rtbno(struct xfs_mount *mp, xfs_rtblock_t rtbno);
 bool xfs_verify_icount(struct xfs_mount *mp, unsigned long long icount);
+bool xfs_verify_dablk(struct xfs_mount *mp, xfs_fileoff_t off);
+void xfs_icount_range(struct xfs_mount *mp, unsigned long long *min,
+		unsigned long long *max);
 
 #endif	/* __XFS_TYPES_H__ */
diff --git a/fs/xfs/scrub/agheader.c b/fs/xfs/scrub/agheader.c
index 90955ab1e895..16b09b941441 100644
--- a/fs/xfs/scrub/agheader.c
+++ b/fs/xfs/scrub/agheader.c
@@ -9,20 +9,13 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
-#include "xfs_log_format.h"
-#include "xfs_trans.h"
 #include "xfs_sb.h"
-#include "xfs_inode.h"
 #include "xfs_alloc.h"
 #include "xfs_ialloc.h"
 #include "xfs_rmap.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
-#include "scrub/trace.h"
 
 /* Superblock */
 
@@ -399,7 +392,7 @@ xchk_agf_xref_cntbt(
 	if (!xchk_should_check_xref(sc, &error, &sc->sa.cnt_cur))
 		return;
 	if (!have) {
-		if (agf->agf_freeblks != be32_to_cpu(0))
+		if (agf->agf_freeblks != cpu_to_be32(0))
 			xchk_block_xref_set_corrupt(sc, sc->sa.agf_bp);
 		return;
 	}
@@ -514,6 +507,7 @@ xchk_agf(
 {
 	struct xfs_mount	*mp = sc->mp;
 	struct xfs_agf		*agf;
+	struct xfs_perag	*pag;
 	xfs_agnumber_t		agno;
 	xfs_agblock_t		agbno;
 	xfs_agblock_t		eoag;
@@ -586,6 +580,16 @@ xchk_agf(
 	if (agfl_count != 0 && fl_count != agfl_count)
 		xchk_block_set_corrupt(sc, sc->sa.agf_bp);
 
+	/* Do the incore counters match? */
+	pag = xfs_perag_get(mp, agno);
+	if (pag->pagf_freeblks != be32_to_cpu(agf->agf_freeblks))
+		xchk_block_set_corrupt(sc, sc->sa.agf_bp);
+	if (pag->pagf_flcount != be32_to_cpu(agf->agf_flcount))
+		xchk_block_set_corrupt(sc, sc->sa.agf_bp);
+	if (pag->pagf_btreeblks != be32_to_cpu(agf->agf_btreeblks))
+		xchk_block_set_corrupt(sc, sc->sa.agf_bp);
+	xfs_perag_put(pag);
+
 	xchk_agf_xref(sc);
 out:
 	return error;
@@ -635,7 +639,7 @@ xchk_agfl_block(
 	xchk_agfl_block_xref(sc, agbno);
 
 	if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
-		return XFS_BTREE_QUERY_RANGE_ABORT;
+		return XFS_ITER_ABORT;
 
 	return 0;
 }
@@ -726,7 +730,7 @@ xchk_agfl(
 	/* Check the blocks in the AGFL. */
 	error = xfs_agfl_walk(sc->mp, XFS_BUF_TO_AGF(sc->sa.agf_bp),
 			sc->sa.agfl_bp, xchk_agfl_block, &sai);
-	if (error == XFS_BTREE_QUERY_RANGE_ABORT) {
+	if (error == XFS_ITER_ABORT) {
 		error = 0;
 		goto out_free;
 	}
@@ -811,6 +815,7 @@ xchk_agi(
 {
 	struct xfs_mount	*mp = sc->mp;
 	struct xfs_agi		*agi;
+	struct xfs_perag	*pag;
 	xfs_agnumber_t		agno;
 	xfs_agblock_t		agbno;
 	xfs_agblock_t		eoag;
@@ -864,25 +869,31 @@ xchk_agi(
 
 	/* Check inode pointers */
 	agino = be32_to_cpu(agi->agi_newino);
-	if (agino != NULLAGINO && !xfs_verify_agino(mp, agno, agino))
+	if (!xfs_verify_agino_or_null(mp, agno, agino))
 		xchk_block_set_corrupt(sc, sc->sa.agi_bp);
 
 	agino = be32_to_cpu(agi->agi_dirino);
-	if (agino != NULLAGINO && !xfs_verify_agino(mp, agno, agino))
+	if (!xfs_verify_agino_or_null(mp, agno, agino))
 		xchk_block_set_corrupt(sc, sc->sa.agi_bp);
 
 	/* Check unlinked inode buckets */
 	for (i = 0; i < XFS_AGI_UNLINKED_BUCKETS; i++) {
 		agino = be32_to_cpu(agi->agi_unlinked[i]);
-		if (agino == NULLAGINO)
-			continue;
-		if (!xfs_verify_agino(mp, agno, agino))
+		if (!xfs_verify_agino_or_null(mp, agno, agino))
 			xchk_block_set_corrupt(sc, sc->sa.agi_bp);
 	}
 
 	if (agi->agi_pad32 != cpu_to_be32(0))
 		xchk_block_set_corrupt(sc, sc->sa.agi_bp);
 
+	/* Do the incore counters match? */
+	pag = xfs_perag_get(mp, agno);
+	if (pag->pagi_count != be32_to_cpu(agi->agi_count))
+		xchk_block_set_corrupt(sc, sc->sa.agi_bp);
+	if (pag->pagi_freecount != be32_to_cpu(agi->agi_freecount))
+		xchk_block_set_corrupt(sc, sc->sa.agi_bp);
+	xfs_perag_put(pag);
+
 	xchk_agi_xref(sc);
 out:
 	return error;
diff --git a/fs/xfs/scrub/agheader_repair.c b/fs/xfs/scrub/agheader_repair.c
index 03d1e15cceba..7a1a38b636a9 100644
--- a/fs/xfs/scrub/agheader_repair.c
+++ b/fs/xfs/scrub/agheader_repair.c
@@ -9,22 +9,17 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
 #include "xfs_sb.h"
-#include "xfs_inode.h"
 #include "xfs_alloc.h"
 #include "xfs_alloc_btree.h"
 #include "xfs_ialloc.h"
 #include "xfs_ialloc_btree.h"
 #include "xfs_rmap.h"
 #include "xfs_rmap_btree.h"
-#include "xfs_refcount.h"
 #include "xfs_refcount_btree.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/trace.h"
@@ -341,23 +336,19 @@ xrep_agf(
 	struct xrep_find_ag_btree	fab[XREP_AGF_MAX] = {
 		[XREP_AGF_BNOBT] = {
 			.rmap_owner = XFS_RMAP_OWN_AG,
-			.buf_ops = &xfs_allocbt_buf_ops,
-			.magic = XFS_ABTB_CRC_MAGIC,
+			.buf_ops = &xfs_bnobt_buf_ops,
 		},
 		[XREP_AGF_CNTBT] = {
 			.rmap_owner = XFS_RMAP_OWN_AG,
-			.buf_ops = &xfs_allocbt_buf_ops,
-			.magic = XFS_ABTC_CRC_MAGIC,
+			.buf_ops = &xfs_cntbt_buf_ops,
 		},
 		[XREP_AGF_RMAPBT] = {
 			.rmap_owner = XFS_RMAP_OWN_AG,
 			.buf_ops = &xfs_rmapbt_buf_ops,
-			.magic = XFS_RMAP_CRC_MAGIC,
 		},
 		[XREP_AGF_REFCOUNTBT] = {
 			.rmap_owner = XFS_RMAP_OWN_REFC,
 			.buf_ops = &xfs_refcountbt_buf_ops,
-			.magic = XFS_REFC_CRC_MAGIC,
 		},
 		[XREP_AGF_END] = {
 			.buf_ops = NULL,
@@ -875,12 +866,10 @@ xrep_agi(
 		[XREP_AGI_INOBT] = {
 			.rmap_owner = XFS_RMAP_OWN_INOBT,
 			.buf_ops = &xfs_inobt_buf_ops,
-			.magic = XFS_IBT_CRC_MAGIC,
 		},
 		[XREP_AGI_FINOBT] = {
 			.rmap_owner = XFS_RMAP_OWN_INOBT,
-			.buf_ops = &xfs_inobt_buf_ops,
-			.magic = XFS_FIBT_CRC_MAGIC,
+			.buf_ops = &xfs_finobt_buf_ops,
 		},
 		[XREP_AGI_END] = {
 			.buf_ops = NULL
diff --git a/fs/xfs/scrub/alloc.c b/fs/xfs/scrub/alloc.c
index 44883e9112ad..a43d1813c4ff 100644
--- a/fs/xfs/scrub/alloc.c
+++ b/fs/xfs/scrub/alloc.c
@@ -9,19 +9,12 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
-#include "xfs_log_format.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_alloc.h"
 #include "xfs_rmap.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/btree.h"
-#include "scrub/trace.h"
 
 /*
  * Set us up to scrub free space btrees.
diff --git a/fs/xfs/scrub/attr.c b/fs/xfs/scrub/attr.c
index 81d5e90547a1..1afc58bf71dd 100644
--- a/fs/xfs/scrub/attr.c
+++ b/fs/xfs/scrub/attr.c
@@ -9,26 +9,62 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
 #include "xfs_da_format.h"
 #include "xfs_da_btree.h"
-#include "xfs_dir2.h"
 #include "xfs_attr.h"
 #include "xfs_attr_leaf.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/dabtree.h"
-#include "scrub/trace.h"
+#include "scrub/attr.h"
 
-#include <linux/posix_acl_xattr.h>
-#include <linux/xattr.h>
+/*
+ * Allocate enough memory to hold an attr value and attr block bitmaps,
+ * reallocating the buffer if necessary.  Buffer contents are not preserved
+ * across a reallocation.
+ */
+int
+xchk_setup_xattr_buf(
+	struct xfs_scrub	*sc,
+	size_t			value_size,
+	xfs_km_flags_t		flags)
+{
+	size_t			sz;
+	struct xchk_xattr_buf	*ab = sc->buf;
+
+	/*
+	 * We need enough space to read an xattr value from the file or enough
+	 * space to hold three copies of the xattr free space bitmap.  We don't
+	 * need the buffer space for both purposes at the same time.
+	 */
+	sz = 3 * sizeof(long) * BITS_TO_LONGS(sc->mp->m_attr_geo->blksize);
+	sz = max_t(size_t, sz, value_size);
+
+	/*
+	 * If there's already a buffer, figure out if we need to reallocate it
+	 * to accommodate a larger size.
+	 */
+	if (ab) {
+		if (sz <= ab->sz)
+			return 0;
+		kmem_free(ab);
+		sc->buf = NULL;
+	}
+
+	/*
+	 * Don't zero the buffer upon allocation to avoid runtime overhead.
+	 * All users must be careful never to read uninitialized contents.
+	 */
+	ab = kmem_alloc_large(sizeof(*ab) + sz, flags);
+	if (!ab)
+		return -ENOMEM;
+
+	ab->sz = sz;
+	sc->buf = ab;
+	return 0;
+}
 
 /* Set us up to scrub an inode's extended attributes. */
 int
@@ -36,19 +72,18 @@ xchk_setup_xattr(
 	struct xfs_scrub	*sc,
 	struct xfs_inode	*ip)
 {
-	size_t			sz;
+	int			error;
 
 	/*
-	 * Allocate the buffer without the inode lock held.  We need enough
-	 * space to read every xattr value in the file or enough space to
-	 * hold three copies of the xattr free space bitmap.  (Not both at
-	 * the same time.)
+	 * We failed to get memory while checking attrs, so this time try to
+	 * get all the memory we're ever going to need.  Allocate the buffer
+	 * without the inode lock held, which means we can sleep.
 	 */
-	sz = max_t(size_t, XATTR_SIZE_MAX, 3 * sizeof(long) *
-			BITS_TO_LONGS(sc->mp->m_attr_geo->blksize));
-	sc->buf = kmem_zalloc_large(sz, KM_SLEEP);
-	if (!sc->buf)
-		return -ENOMEM;
+	if (sc->flags & XCHK_TRY_HARDER) {
+		error = xchk_setup_xattr_buf(sc, XATTR_SIZE_MAX, KM_SLEEP);
+		if (error)
+			return error;
+	}
 
 	return xchk_setup_inode_contents(sc, ip, 0);
 }
@@ -82,12 +117,36 @@ xchk_xattr_listent(
 
 	sx = container_of(context, struct xchk_xattr, context);
 
+	if (xchk_should_terminate(sx->sc, &error)) {
+		context->seen_enough = error;
+		return;
+	}
+
 	if (flags & XFS_ATTR_INCOMPLETE) {
 		/* Incomplete attr key, just mark the inode for preening. */
 		xchk_ino_set_preen(sx->sc, context->dp->i_ino);
 		return;
 	}
 
+	/* Does this name make sense? */
+	if (!xfs_attr_namecheck(name, namelen)) {
+		xchk_fblock_set_corrupt(sx->sc, XFS_ATTR_FORK, args.blkno);
+		return;
+	}
+
+	/*
+	 * Try to allocate enough memory to extrat the attr value.  If that
+	 * doesn't work, we overload the seen_enough variable to convey
+	 * the error message back to the main scrub function.
+	 */
+	error = xchk_setup_xattr_buf(sx->sc, valuelen, KM_MAYFAIL);
+	if (error == -ENOMEM)
+		error = -EDEADLOCK;
+	if (error) {
+		context->seen_enough = error;
+		return;
+	}
+
 	args.flags = ATTR_KERNOTIME;
 	if (flags & XFS_ATTR_ROOT)
 		args.flags |= ATTR_ROOT;
@@ -100,8 +159,8 @@ xchk_xattr_listent(
 	args.namelen = namelen;
 	args.hashval = xfs_da_hashname(args.name, args.namelen);
 	args.trans = context->tp;
-	args.value = sx->sc->buf;
-	args.valuelen = XATTR_SIZE_MAX;
+	args.value = xchk_xattr_valuebuf(sx->sc);
+	args.valuelen = valuelen;
 
 	error = xfs_attr_get_ilocked(context->dp, &args);
 	if (error == -EEXIST)
@@ -114,7 +173,7 @@ xchk_xattr_listent(
 					     args.blkno);
 fail_xref:
 	if (sx->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
-		context->seen_enough = 1;
+		context->seen_enough = XFS_ITER_ABORT;
 	return;
 }
 
@@ -159,13 +218,12 @@ xchk_xattr_check_freemap(
 	unsigned long			*map,
 	struct xfs_attr3_icleaf_hdr	*leafhdr)
 {
-	unsigned long			*freemap;
-	unsigned long			*dstmap;
+	unsigned long			*freemap = xchk_xattr_freemap(sc);
+	unsigned long			*dstmap = xchk_xattr_dstmap(sc);
 	unsigned int			mapsize = sc->mp->m_attr_geo->blksize;
 	int				i;
 
 	/* Construct bitmap of freemap contents. */
-	freemap = (unsigned long *)sc->buf + BITS_TO_LONGS(mapsize);
 	bitmap_zero(freemap, mapsize);
 	for (i = 0; i < XFS_ATTR_LEAF_MAPSIZE; i++) {
 		if (!xchk_xattr_set_map(sc, freemap,
@@ -175,7 +233,6 @@ xchk_xattr_check_freemap(
 	}
 
 	/* Look for bits that are set in freemap and are marked in use. */
-	dstmap = freemap + BITS_TO_LONGS(mapsize);
 	return bitmap_and(dstmap, freemap, map, mapsize) == 0;
 }
 
@@ -190,13 +247,13 @@ xchk_xattr_entry(
 	char				*buf_end,
 	struct xfs_attr_leafblock	*leaf,
 	struct xfs_attr3_icleaf_hdr	*leafhdr,
-	unsigned long			*usedmap,
 	struct xfs_attr_leaf_entry	*ent,
 	int				idx,
 	unsigned int			*usedbytes,
 	__u32				*last_hashval)
 {
 	struct xfs_mount		*mp = ds->state->mp;
+	unsigned long			*usedmap = xchk_xattr_usedmap(ds->sc);
 	char				*name_end;
 	struct xfs_attr_leaf_name_local	*lentry;
 	struct xfs_attr_leaf_name_remote *rentry;
@@ -256,16 +313,26 @@ xchk_xattr_block(
 	struct xfs_attr_leafblock	*leaf = bp->b_addr;
 	struct xfs_attr_leaf_entry	*ent;
 	struct xfs_attr_leaf_entry	*entries;
-	unsigned long			*usedmap = ds->sc->buf;
+	unsigned long			*usedmap;
 	char				*buf_end;
 	size_t				off;
 	__u32				last_hashval = 0;
 	unsigned int			usedbytes = 0;
 	unsigned int			hdrsize;
 	int				i;
+	int				error;
 
 	if (*last_checked == blk->blkno)
 		return 0;
+
+	/* Allocate memory for block usage checking. */
+	error = xchk_setup_xattr_buf(ds->sc, 0, KM_MAYFAIL);
+	if (error == -ENOMEM)
+		return -EDEADLOCK;
+	if (error)
+		return error;
+	usedmap = xchk_xattr_usedmap(ds->sc);
+
 	*last_checked = blk->blkno;
 	bitmap_zero(usedmap, mp->m_attr_geo->blksize);
 
@@ -313,7 +380,7 @@ xchk_xattr_block(
 
 		/* Check the entry and nameval. */
 		xchk_xattr_entry(ds, level, buf_end, leaf, &leafhdr,
-				usedmap, ent, i, &usedbytes, &last_hashval);
+				ent, i, &usedbytes, &last_hashval);
 
 		if (ds->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
 			goto out;
@@ -453,6 +520,10 @@ xchk_xattr(
 	error = xfs_attr_list_int_ilocked(&sx.context);
 	if (!xchk_fblock_process_error(sc, XFS_ATTR_FORK, 0, &error))
 		goto out;
+
+	/* Did our listent function try to return any errors? */
+	if (sx.context.seen_enough < 0)
+		error = sx.context.seen_enough;
 out:
 	return error;
 }
diff --git a/fs/xfs/scrub/attr.h b/fs/xfs/scrub/attr.h
new file mode 100644
index 000000000000..13a1d2e8424d
--- /dev/null
+++ b/fs/xfs/scrub/attr.h
@@ -0,0 +1,71 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#ifndef __XFS_SCRUB_ATTR_H__
+#define __XFS_SCRUB_ATTR_H__
+
+/*
+ * Temporary storage for online scrub and repair of extended attributes.
+ */
+struct xchk_xattr_buf {
+	/* Size of @buf, in bytes. */
+	size_t			sz;
+
+	/*
+	 * Memory buffer -- either used for extracting attr values while
+	 * walking the attributes; or for computing attr block bitmaps when
+	 * checking the attribute tree.
+	 *
+	 * Each bitmap contains enough bits to track every byte in an attr
+	 * block (rounded up to the size of an unsigned long).  The attr block
+	 * used space bitmap starts at the beginning of the buffer; the free
+	 * space bitmap follows immediately after; and we have a third buffer
+	 * for storing intermediate bitmap results.
+	 */
+	uint8_t			buf[0];
+};
+
+/* A place to store attribute values. */
+static inline uint8_t *
+xchk_xattr_valuebuf(
+	struct xfs_scrub	*sc)
+{
+	struct xchk_xattr_buf	*ab = sc->buf;
+
+	return ab->buf;
+}
+
+/* A bitmap of space usage computed by walking an attr leaf block. */
+static inline unsigned long *
+xchk_xattr_usedmap(
+	struct xfs_scrub	*sc)
+{
+	struct xchk_xattr_buf	*ab = sc->buf;
+
+	return (unsigned long *)ab->buf;
+}
+
+/* A bitmap of free space computed by walking attr leaf block free info. */
+static inline unsigned long *
+xchk_xattr_freemap(
+	struct xfs_scrub	*sc)
+{
+	return xchk_xattr_usedmap(sc) +
+			BITS_TO_LONGS(sc->mp->m_attr_geo->blksize);
+}
+
+/* A bitmap used to hold temporary results. */
+static inline unsigned long *
+xchk_xattr_dstmap(
+	struct xfs_scrub	*sc)
+{
+	return xchk_xattr_freemap(sc) +
+			BITS_TO_LONGS(sc->mp->m_attr_geo->blksize);
+}
+
+int xchk_setup_xattr_buf(struct xfs_scrub *sc, size_t value_size,
+		xfs_km_flags_t flags);
+
+#endif	/* __XFS_SCRUB_ATTR_H__ */
diff --git a/fs/xfs/scrub/bitmap.c b/fs/xfs/scrub/bitmap.c
index fdadc9e1dc49..3d47d111be5a 100644
--- a/fs/xfs/scrub/bitmap.c
+++ b/fs/xfs/scrub/bitmap.c
@@ -10,11 +10,6 @@
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
 #include "xfs_btree.h"
-#include "scrub/xfs_scrub.h"
-#include "scrub/scrub.h"
-#include "scrub/common.h"
-#include "scrub/trace.h"
-#include "scrub/repair.h"
 #include "scrub/bitmap.h"
 
 /*
diff --git a/fs/xfs/scrub/bmap.c b/fs/xfs/scrub/bmap.c
index e1d11f3223e3..1bd29fdc2ab5 100644
--- a/fs/xfs/scrub/bmap.c
+++ b/fs/xfs/scrub/bmap.c
@@ -9,27 +9,19 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
 #include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
-#include "xfs_inode_fork.h"
 #include "xfs_alloc.h"
-#include "xfs_rtalloc.h"
 #include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
 #include "xfs_bmap_btree.h"
 #include "xfs_rmap.h"
 #include "xfs_rmap_btree.h"
-#include "xfs_refcount.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/btree.h"
-#include "scrub/trace.h"
 
 /* Set us up with an inode's bmap. */
 int
@@ -281,6 +273,31 @@ xchk_bmap_extent_xref(
 	xchk_ag_free(info->sc, &info->sc->sa);
 }
 
+/*
+ * Directories and attr forks should never have blocks that can't be addressed
+ * by a xfs_dablk_t.
+ */
+STATIC void
+xchk_bmap_dirattr_extent(
+	struct xfs_inode	*ip,
+	struct xchk_bmap_info	*info,
+	struct xfs_bmbt_irec	*irec)
+{
+	struct xfs_mount	*mp = ip->i_mount;
+	xfs_fileoff_t		off;
+
+	if (!S_ISDIR(VFS_I(ip)->i_mode) && info->whichfork != XFS_ATTR_FORK)
+		return;
+
+	if (!xfs_verify_dablk(mp, irec->br_startoff))
+		xchk_fblock_set_corrupt(info->sc, info->whichfork,
+				irec->br_startoff);
+
+	off = irec->br_startoff + irec->br_blockcount - 1;
+	if (!xfs_verify_dablk(mp, off))
+		xchk_fblock_set_corrupt(info->sc, info->whichfork, off);
+}
+
 /* Scrub a single extent record. */
 STATIC int
 xchk_bmap_extent(
@@ -305,6 +322,8 @@ xchk_bmap_extent(
 		xchk_fblock_set_corrupt(info->sc, info->whichfork,
 				irec->br_startoff);
 
+	xchk_bmap_dirattr_extent(ip, info, irec);
+
 	/* There should never be a "hole" extent in either extent list. */
 	if (irec->br_startblock == HOLESTARTBLOCK)
 		xchk_fblock_set_corrupt(info->sc, info->whichfork,
diff --git a/fs/xfs/scrub/btree.c b/fs/xfs/scrub/btree.c
index 6f94d1f7322d..f52a7b8256f9 100644
--- a/fs/xfs/scrub/btree.c
+++ b/fs/xfs/scrub/btree.c
@@ -9,14 +9,7 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
-#include "xfs_log_format.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_inode.h"
-#include "xfs_alloc.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/btree.h"
@@ -415,8 +408,17 @@ xchk_btree_check_owner(
 	struct xfs_btree_cur	*cur = bs->cur;
 	struct check_owner	*co;
 
-	if ((cur->bc_flags & XFS_BTREE_ROOT_IN_INODE) && bp == NULL)
+	/*
+	 * In theory, xfs_btree_get_block should only give us a null buffer
+	 * pointer for the root of a root-in-inode btree type, but we need
+	 * to check defensively here in case the cursor state is also screwed
+	 * up.
+	 */
+	if (bp == NULL) {
+		if (!(cur->bc_flags & XFS_BTREE_ROOT_IN_INODE))
+			xchk_btree_set_corrupt(bs->sc, bs->cur, level);
 		return 0;
+	}
 
 	/*
 	 * We want to cross-reference each btree block with the bnobt
diff --git a/fs/xfs/scrub/common.c b/fs/xfs/scrub/common.c
index 0c54ff55b901..18876056e5e0 100644
--- a/fs/xfs/scrub/common.c
+++ b/fs/xfs/scrub/common.c
@@ -9,22 +9,16 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
 #include "xfs_sb.h"
 #include "xfs_inode.h"
 #include "xfs_icache.h"
-#include "xfs_itable.h"
 #include "xfs_alloc.h"
 #include "xfs_alloc_btree.h"
-#include "xfs_bmap.h"
-#include "xfs_bmap_btree.h"
 #include "xfs_ialloc.h"
 #include "xfs_ialloc_btree.h"
-#include "xfs_refcount.h"
 #include "xfs_refcount_btree.h"
 #include "xfs_rmap.h"
 #include "xfs_rmap_btree.h"
@@ -32,12 +26,11 @@
 #include "xfs_trans_priv.h"
 #include "xfs_attr.h"
 #include "xfs_reflink.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/trace.h"
-#include "scrub/btree.h"
 #include "scrub/repair.h"
+#include "scrub/health.h"
 
 /* Common code for the metadata scrubbers. */
 
@@ -208,6 +201,15 @@ xchk_ino_set_preen(
 	trace_xchk_ino_preen(sc, ino, __return_address);
 }
 
+/* Record something being wrong with the filesystem primary superblock. */
+void
+xchk_set_corrupt(
+	struct xfs_scrub	*sc)
+{
+	sc->sm->sm_flags |= XFS_SCRUB_OFLAG_CORRUPT;
+	trace_xchk_fs_error(sc, 0, __return_address);
+}
+
 /* Record a corrupt block. */
 void
 xchk_block_set_corrupt(
@@ -458,13 +460,18 @@ xchk_ag_btcur_init(
 	struct xfs_mount	*mp = sc->mp;
 	xfs_agnumber_t		agno = sa->agno;
 
-	if (sa->agf_bp) {
+	xchk_perag_get(sc->mp, sa);
+	if (sa->agf_bp &&
+	    xchk_ag_btree_healthy_enough(sc, sa->pag, XFS_BTNUM_BNO)) {
 		/* Set up a bnobt cursor for cross-referencing. */
 		sa->bno_cur = xfs_allocbt_init_cursor(mp, sc->tp, sa->agf_bp,
 				agno, XFS_BTNUM_BNO);
 		if (!sa->bno_cur)
 			goto err;
+	}
 
+	if (sa->agf_bp &&
+	    xchk_ag_btree_healthy_enough(sc, sa->pag, XFS_BTNUM_CNT)) {
 		/* Set up a cntbt cursor for cross-referencing. */
 		sa->cnt_cur = xfs_allocbt_init_cursor(mp, sc->tp, sa->agf_bp,
 				agno, XFS_BTNUM_CNT);
@@ -473,7 +480,8 @@ xchk_ag_btcur_init(
 	}
 
 	/* Set up a inobt cursor for cross-referencing. */
-	if (sa->agi_bp) {
+	if (sa->agi_bp &&
+	    xchk_ag_btree_healthy_enough(sc, sa->pag, XFS_BTNUM_INO)) {
 		sa->ino_cur = xfs_inobt_init_cursor(mp, sc->tp, sa->agi_bp,
 					agno, XFS_BTNUM_INO);
 		if (!sa->ino_cur)
@@ -481,7 +489,8 @@ xchk_ag_btcur_init(
 	}
 
 	/* Set up a finobt cursor for cross-referencing. */
-	if (sa->agi_bp && xfs_sb_version_hasfinobt(&mp->m_sb)) {
+	if (sa->agi_bp && xfs_sb_version_hasfinobt(&mp->m_sb) &&
+	    xchk_ag_btree_healthy_enough(sc, sa->pag, XFS_BTNUM_FINO)) {
 		sa->fino_cur = xfs_inobt_init_cursor(mp, sc->tp, sa->agi_bp,
 				agno, XFS_BTNUM_FINO);
 		if (!sa->fino_cur)
@@ -489,7 +498,8 @@ xchk_ag_btcur_init(
 	}
 
 	/* Set up a rmapbt cursor for cross-referencing. */
-	if (sa->agf_bp && xfs_sb_version_hasrmapbt(&mp->m_sb)) {
+	if (sa->agf_bp && xfs_sb_version_hasrmapbt(&mp->m_sb) &&
+	    xchk_ag_btree_healthy_enough(sc, sa->pag, XFS_BTNUM_RMAP)) {
 		sa->rmap_cur = xfs_rmapbt_init_cursor(mp, sc->tp, sa->agf_bp,
 				agno);
 		if (!sa->rmap_cur)
@@ -497,7 +507,8 @@ xchk_ag_btcur_init(
 	}
 
 	/* Set up a refcountbt cursor for cross-referencing. */
-	if (sa->agf_bp && xfs_sb_version_hasreflink(&mp->m_sb)) {
+	if (sa->agf_bp && xfs_sb_version_hasreflink(&mp->m_sb) &&
+	    xchk_ag_btree_healthy_enough(sc, sa->pag, XFS_BTNUM_REFC)) {
 		sa->refc_cur = xfs_refcountbt_init_cursor(mp, sc->tp,
 				sa->agf_bp, agno);
 		if (!sa->refc_cur)
@@ -884,3 +895,21 @@ xchk_ilock_inverted(
 	}
 	return -EDEADLOCK;
 }
+
+/* Pause background reaping of resources. */
+void
+xchk_stop_reaping(
+	struct xfs_scrub	*sc)
+{
+	sc->flags |= XCHK_REAPING_DISABLED;
+	xfs_stop_block_reaping(sc->mp);
+}
+
+/* Restart background reaping of resources. */
+void
+xchk_start_reaping(
+	struct xfs_scrub	*sc)
+{
+	xfs_start_block_reaping(sc->mp);
+	sc->flags &= ~XCHK_REAPING_DISABLED;
+}
diff --git a/fs/xfs/scrub/common.h b/fs/xfs/scrub/common.h
index e26a430bd466..003a772cd26c 100644
--- a/fs/xfs/scrub/common.h
+++ b/fs/xfs/scrub/common.h
@@ -39,6 +39,7 @@ void xchk_block_set_preen(struct xfs_scrub *sc,
 		struct xfs_buf *bp);
 void xchk_ino_set_preen(struct xfs_scrub *sc, xfs_ino_t ino);
 
+void xchk_set_corrupt(struct xfs_scrub *sc);
 void xchk_block_set_corrupt(struct xfs_scrub *sc,
 		struct xfs_buf *bp);
 void xchk_ino_set_corrupt(struct xfs_scrub *sc, xfs_ino_t ino);
@@ -105,6 +106,7 @@ xchk_setup_quota(struct xfs_scrub *sc, struct xfs_inode *ip)
 	return -ENOENT;
 }
 #endif
+int xchk_setup_fscounters(struct xfs_scrub *sc, struct xfs_inode *ip);
 
 void xchk_ag_free(struct xfs_scrub *sc, struct xchk_ag *sa);
 int xchk_ag_init(struct xfs_scrub *sc, xfs_agnumber_t agno,
@@ -137,5 +139,7 @@ static inline bool xchk_skip_xref(struct xfs_scrub_metadata *sm)
 
 int xchk_metadata_inode_forks(struct xfs_scrub *sc);
 int xchk_ilock_inverted(struct xfs_inode *ip, uint lock_mode);
+void xchk_stop_reaping(struct xfs_scrub *sc);
+void xchk_start_reaping(struct xfs_scrub *sc);
 
 #endif	/* __XFS_SCRUB_COMMON_H__ */
diff --git a/fs/xfs/scrub/dabtree.c b/fs/xfs/scrub/dabtree.c
index f1260b4bfdee..94c4f1de1922 100644
--- a/fs/xfs/scrub/dabtree.c
+++ b/fs/xfs/scrub/dabtree.c
@@ -9,20 +9,12 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
-#include "xfs_inode_fork.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_dir2.h"
 #include "xfs_dir2_priv.h"
 #include "xfs_attr_leaf.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/trace.h"
@@ -574,6 +566,11 @@ xchk_da_btree(
 		/* Drill another level deeper. */
 		blkno = be32_to_cpu(key->before);
 		level++;
+		if (level >= XFS_DA_NODE_MAXDEPTH) {
+			/* Too deep! */
+			xchk_da_set_corrupt(&ds, level - 1);
+			break;
+		}
 		ds.tree_level--;
 		error = xchk_da_btree_block(&ds, level, blkno);
 		if (error)
diff --git a/fs/xfs/scrub/dir.c b/fs/xfs/scrub/dir.c
index cd3e4d768a18..1e2e11721eb9 100644
--- a/fs/xfs/scrub/dir.c
+++ b/fs/xfs/scrub/dir.c
@@ -9,24 +9,14 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
 #include "xfs_icache.h"
-#include "xfs_itable.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_dir2.h"
 #include "xfs_dir2_priv.h"
-#include "xfs_ialloc.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
-#include "scrub/trace.h"
 #include "scrub/dabtree.h"
 
 /* Set us up to scrub directories. */
@@ -129,6 +119,12 @@ xchk_dir_actor(
 		goto out;
 	}
 
+	/* Does this name make sense? */
+	if (!xfs_dir2_namecheck(name, namelen)) {
+		xchk_fblock_set_corrupt(sdc->sc, XFS_DATA_FORK, offset);
+		goto out;
+	}
+
 	if (!strncmp(".", name, namelen)) {
 		/* If this is "." then check that the inum matches the dir. */
 		if (xfs_sb_version_hasftype(&mp->m_sb) && type != DT_DIR)
diff --git a/fs/xfs/scrub/fscounters.c b/fs/xfs/scrub/fscounters.c
new file mode 100644
index 000000000000..fc3f510c9034
--- /dev/null
+++ b/fs/xfs/scrub/fscounters.c
@@ -0,0 +1,354 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_sb.h"
+#include "xfs_alloc.h"
+#include "xfs_ialloc.h"
+#include "xfs_health.h"
+#include "scrub/scrub.h"
+#include "scrub/common.h"
+#include "scrub/trace.h"
+
+/*
+ * FS Summary Counters
+ * ===================
+ *
+ * The basics of filesystem summary counter checking are that we iterate the
+ * AGs counting the number of free blocks, free space btree blocks, per-AG
+ * reservations, inodes, delayed allocation reservations, and free inodes.
+ * Then we compare what we computed against the in-core counters.
+ *
+ * However, the reality is that summary counters are a tricky beast to check.
+ * While we /could/ freeze the filesystem and scramble around the AGs counting
+ * the free blocks, in practice we prefer not do that for a scan because
+ * freezing is costly.  To get around this, we added a per-cpu counter of the
+ * delalloc reservations so that we can rotor around the AGs relatively
+ * quickly, and we allow the counts to be slightly off because we're not taking
+ * any locks while we do this.
+ *
+ * So the first thing we do is warm up the buffer cache in the setup routine by
+ * walking all the AGs to make sure the incore per-AG structure has been
+ * initialized.  The expected value calculation then iterates the incore per-AG
+ * structures as quickly as it can.  We snapshot the percpu counters before and
+ * after this operation and use the difference in counter values to guess at
+ * our tolerance for mismatch between expected and actual counter values.
+ */
+
+/*
+ * Since the expected value computation is lockless but only browses incore
+ * values, the percpu counters should be fairly close to each other.  However,
+ * we'll allow ourselves to be off by at least this (arbitrary) amount.
+ */
+#define XCHK_FSCOUNT_MIN_VARIANCE	(512)
+
+/*
+ * Make sure the per-AG structure has been initialized from the on-disk header
+ * contents and trust that the incore counters match the ondisk counters.  (The
+ * AGF and AGI scrubbers check them, and a normal xfs_scrub run checks the
+ * summary counters after checking all AG headers).  Do this from the setup
+ * function so that the inner AG aggregation loop runs as quickly as possible.
+ *
+ * This function runs during the setup phase /before/ we start checking any
+ * metadata.
+ */
+STATIC int
+xchk_fscount_warmup(
+	struct xfs_scrub	*sc)
+{
+	struct xfs_mount	*mp = sc->mp;
+	struct xfs_buf		*agi_bp = NULL;
+	struct xfs_buf		*agf_bp = NULL;
+	struct xfs_perag	*pag = NULL;
+	xfs_agnumber_t		agno;
+	int			error = 0;
+
+	for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
+		pag = xfs_perag_get(mp, agno);
+
+		if (pag->pagi_init && pag->pagf_init)
+			goto next_loop_perag;
+
+		/* Lock both AG headers. */
+		error = xfs_ialloc_read_agi(mp, sc->tp, agno, &agi_bp);
+		if (error)
+			break;
+		error = xfs_alloc_read_agf(mp, sc->tp, agno, 0, &agf_bp);
+		if (error)
+			break;
+		error = -ENOMEM;
+		if (!agf_bp || !agi_bp)
+			break;
+
+		/*
+		 * These are supposed to be initialized by the header read
+		 * function.
+		 */
+		error = -EFSCORRUPTED;
+		if (!pag->pagi_init || !pag->pagf_init)
+			break;
+
+		xfs_buf_relse(agf_bp);
+		agf_bp = NULL;
+		xfs_buf_relse(agi_bp);
+		agi_bp = NULL;
+next_loop_perag:
+		xfs_perag_put(pag);
+		pag = NULL;
+		error = 0;
+
+		if (fatal_signal_pending(current))
+			break;
+	}
+
+	if (agf_bp)
+		xfs_buf_relse(agf_bp);
+	if (agi_bp)
+		xfs_buf_relse(agi_bp);
+	if (pag)
+		xfs_perag_put(pag);
+	return error;
+}
+
+int
+xchk_setup_fscounters(
+	struct xfs_scrub	*sc,
+	struct xfs_inode	*ip)
+{
+	struct xchk_fscounters	*fsc;
+	int			error;
+
+	sc->buf = kmem_zalloc(sizeof(struct xchk_fscounters), KM_SLEEP);
+	if (!sc->buf)
+		return -ENOMEM;
+	fsc = sc->buf;
+
+	xfs_icount_range(sc->mp, &fsc->icount_min, &fsc->icount_max);
+
+	/* We must get the incore counters set up before we can proceed. */
+	error = xchk_fscount_warmup(sc);
+	if (error)
+		return error;
+
+	/*
+	 * Pause background reclaim while we're scrubbing to reduce the
+	 * likelihood of background perturbations to the counters throwing off
+	 * our calculations.
+	 */
+	xchk_stop_reaping(sc);
+
+	return xchk_trans_alloc(sc, 0);
+}
+
+/*
+ * Calculate what the global in-core counters ought to be from the incore
+ * per-AG structure.  Callers can compare this to the actual in-core counters
+ * to estimate by how much both in-core and on-disk counters need to be
+ * adjusted.
+ */
+STATIC int
+xchk_fscount_aggregate_agcounts(
+	struct xfs_scrub	*sc,
+	struct xchk_fscounters	*fsc)
+{
+	struct xfs_mount	*mp = sc->mp;
+	struct xfs_perag	*pag;
+	uint64_t		delayed;
+	xfs_agnumber_t		agno;
+	int			tries = 8;
+
+retry:
+	fsc->icount = 0;
+	fsc->ifree = 0;
+	fsc->fdblocks = 0;
+
+	for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
+		pag = xfs_perag_get(mp, agno);
+
+		/* This somehow got unset since the warmup? */
+		if (!pag->pagi_init || !pag->pagf_init) {
+			xfs_perag_put(pag);
+			return -EFSCORRUPTED;
+		}
+
+		/* Count all the inodes */
+		fsc->icount += pag->pagi_count;
+		fsc->ifree += pag->pagi_freecount;
+
+		/* Add up the free/freelist/bnobt/cntbt blocks */
+		fsc->fdblocks += pag->pagf_freeblks;
+		fsc->fdblocks += pag->pagf_flcount;
+		fsc->fdblocks += pag->pagf_btreeblks;
+
+		/*
+		 * Per-AG reservations are taken out of the incore counters,
+		 * so they must be left out of the free blocks computation.
+		 */
+		fsc->fdblocks -= pag->pag_meta_resv.ar_reserved;
+		fsc->fdblocks -= pag->pag_rmapbt_resv.ar_orig_reserved;
+
+		xfs_perag_put(pag);
+
+		if (fatal_signal_pending(current))
+			break;
+	}
+
+	/*
+	 * The global incore space reservation is taken from the incore
+	 * counters, so leave that out of the computation.
+	 */
+	fsc->fdblocks -= mp->m_resblks_avail;
+
+	/*
+	 * Delayed allocation reservations are taken out of the incore counters
+	 * but not recorded on disk, so leave them and their indlen blocks out
+	 * of the computation.
+	 */
+	delayed = percpu_counter_sum(&mp->m_delalloc_blks);
+	fsc->fdblocks -= delayed;
+
+	trace_xchk_fscounters_calc(mp, fsc->icount, fsc->ifree, fsc->fdblocks,
+			delayed);
+
+
+	/* Bail out if the values we compute are totally nonsense. */
+	if (fsc->icount < fsc->icount_min || fsc->icount > fsc->icount_max ||
+	    fsc->fdblocks > mp->m_sb.sb_dblocks ||
+	    fsc->ifree > fsc->icount_max)
+		return -EFSCORRUPTED;
+
+	/*
+	 * If ifree > icount then we probably had some perturbation in the
+	 * counters while we were calculating things.  We'll try a few times
+	 * to maintain ifree <= icount before giving up.
+	 */
+	if (fsc->ifree > fsc->icount) {
+		if (tries--)
+			goto retry;
+		xchk_set_incomplete(sc);
+		return 0;
+	}
+
+	return 0;
+}
+
+/*
+ * Is the @counter reasonably close to the @expected value?
+ *
+ * We neither locked nor froze anything in the filesystem while aggregating the
+ * per-AG data to compute the @expected value, which means that the counter
+ * could have changed.  We know the @old_value of the summation of the counter
+ * before the aggregation, and we re-sum the counter now.  If the expected
+ * value falls between the two summations, we're ok.
+ *
+ * Otherwise, we /might/ have a problem.  If the change in the summations is
+ * more than we want to tolerate, the filesystem is probably busy and we should
+ * just send back INCOMPLETE and see if userspace will try again.
+ */
+static inline bool
+xchk_fscount_within_range(
+	struct xfs_scrub	*sc,
+	const int64_t		old_value,
+	struct percpu_counter	*counter,
+	uint64_t		expected)
+{
+	int64_t			min_value, max_value;
+	int64_t			curr_value = percpu_counter_sum(counter);
+
+	trace_xchk_fscounters_within_range(sc->mp, expected, curr_value,
+			old_value);
+
+	/* Negative values are always wrong. */
+	if (curr_value < 0)
+		return false;
+
+	/* Exact matches are always ok. */
+	if (curr_value == expected)
+		return true;
+
+	min_value = min(old_value, curr_value);
+	max_value = max(old_value, curr_value);
+
+	/* Within the before-and-after range is ok. */
+	if (expected >= min_value && expected <= max_value)
+		return true;
+
+	/*
+	 * If the difference between the two summations is too large, the fs
+	 * might just be busy and so we'll mark the scrub incomplete.  Return
+	 * true here so that we don't mark the counter corrupt.
+	 *
+	 * XXX: In the future when userspace can grant scrub permission to
+	 * quiesce the filesystem to solve the outsized variance problem, this
+	 * check should be moved up and the return code changed to signal to
+	 * userspace that we need quiesce permission.
+	 */
+	if (max_value - min_value >= XCHK_FSCOUNT_MIN_VARIANCE) {
+		xchk_set_incomplete(sc);
+		return true;
+	}
+
+	return false;
+}
+
+/* Check the superblock counters. */
+int
+xchk_fscounters(
+	struct xfs_scrub	*sc)
+{
+	struct xfs_mount	*mp = sc->mp;
+	struct xchk_fscounters	*fsc = sc->buf;
+	int64_t			icount, ifree, fdblocks;
+	int			error;
+
+	/* Snapshot the percpu counters. */
+	icount = percpu_counter_sum(&mp->m_icount);
+	ifree = percpu_counter_sum(&mp->m_ifree);
+	fdblocks = percpu_counter_sum(&mp->m_fdblocks);
+
+	/* No negative values, please! */
+	if (icount < 0 || ifree < 0 || fdblocks < 0)
+		xchk_set_corrupt(sc);
+
+	/* See if icount is obviously wrong. */
+	if (icount < fsc->icount_min || icount > fsc->icount_max)
+		xchk_set_corrupt(sc);
+
+	/* See if fdblocks is obviously wrong. */
+	if (fdblocks > mp->m_sb.sb_dblocks)
+		xchk_set_corrupt(sc);
+
+	/*
+	 * If ifree exceeds icount by more than the minimum variance then
+	 * something's probably wrong with the counters.
+	 */
+	if (ifree > icount && ifree - icount > XCHK_FSCOUNT_MIN_VARIANCE)
+		xchk_set_corrupt(sc);
+
+	/* Walk the incore AG headers to calculate the expected counters. */
+	error = xchk_fscount_aggregate_agcounts(sc, fsc);
+	if (!xchk_process_error(sc, 0, XFS_SB_BLOCK(mp), &error))
+		return error;
+	if (sc->sm->sm_flags & XFS_SCRUB_OFLAG_INCOMPLETE)
+		return 0;
+
+	/* Compare the in-core counters with whatever we counted. */
+	if (!xchk_fscount_within_range(sc, icount, &mp->m_icount, fsc->icount))
+		xchk_set_corrupt(sc);
+
+	if (!xchk_fscount_within_range(sc, ifree, &mp->m_ifree, fsc->ifree))
+		xchk_set_corrupt(sc);
+
+	if (!xchk_fscount_within_range(sc, fdblocks, &mp->m_fdblocks,
+			fsc->fdblocks))
+		xchk_set_corrupt(sc);
+
+	return 0;
+}
diff --git a/fs/xfs/scrub/health.c b/fs/xfs/scrub/health.c
new file mode 100644
index 000000000000..b2f602811e9d
--- /dev/null
+++ b/fs/xfs/scrub/health.c
@@ -0,0 +1,229 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_btree.h"
+#include "xfs_sb.h"
+#include "xfs_health.h"
+#include "scrub/scrub.h"
+
+/*
+ * Scrub and In-Core Filesystem Health Assessments
+ * ===============================================
+ *
+ * Online scrub and repair have the time and the ability to perform stronger
+ * checks than we can do from the metadata verifiers, because they can
+ * cross-reference records between data structures.  Therefore, scrub is in a
+ * good position to update the online filesystem health assessments to reflect
+ * the good/bad state of the data structure.
+ *
+ * We therefore extend scrub in the following ways to achieve this:
+ *
+ * 1. Create a "sick_mask" field in the scrub context.  When we're setting up a
+ * scrub call, set this to the default XFS_SICK_* flag(s) for the selected
+ * scrub type (call it A).  Scrub and repair functions can override the default
+ * sick_mask value if they choose.
+ *
+ * 2. If the scrubber returns a runtime error code, we exit making no changes
+ * to the incore sick state.
+ *
+ * 3. If the scrubber finds that A is clean, use sick_mask to clear the incore
+ * sick flags before exiting.
+ *
+ * 4. If the scrubber finds that A is corrupt, use sick_mask to set the incore
+ * sick flags.  If the user didn't want to repair then we exit, leaving the
+ * metadata structure unfixed and the sick flag set.
+ *
+ * 5. Now we know that A is corrupt and the user wants to repair, so run the
+ * repairer.  If the repairer returns an error code, we exit with that error
+ * code, having made no further changes to the incore sick state.
+ *
+ * 6. If repair rebuilds A correctly and the subsequent re-scrub of A is clean,
+ * use sick_mask to clear the incore sick flags.  This should have the effect
+ * that A is no longer marked sick.
+ *
+ * 7. If repair rebuilds A incorrectly, the re-scrub will find it corrupt and
+ * use sick_mask to set the incore sick flags.  This should have no externally
+ * visible effect since we already set them in step (4).
+ *
+ * There are some complications to this story, however.  For certain types of
+ * complementary metadata indices (e.g. inobt/finobt), it is easier to rebuild
+ * both structures at the same time.  The following principles apply to this
+ * type of repair strategy:
+ *
+ * 8. Any repair function that rebuilds multiple structures should update
+ * sick_mask_visible to reflect whatever other structures are rebuilt, and
+ * verify that all the rebuilt structures can pass a scrub check.  The outcomes
+ * of 5-7 still apply, but with a sick_mask that covers everything being
+ * rebuilt.
+ */
+
+/* Map our scrub type to a sick mask and a set of health update functions. */
+
+enum xchk_health_group {
+	XHG_FS = 1,
+	XHG_RT,
+	XHG_AG,
+	XHG_INO,
+};
+
+struct xchk_health_map {
+	enum xchk_health_group	group;
+	unsigned int		sick_mask;
+};
+
+static const struct xchk_health_map type_to_health_flag[XFS_SCRUB_TYPE_NR] = {
+	[XFS_SCRUB_TYPE_SB]		= { XHG_AG,  XFS_SICK_AG_SB },
+	[XFS_SCRUB_TYPE_AGF]		= { XHG_AG,  XFS_SICK_AG_AGF },
+	[XFS_SCRUB_TYPE_AGFL]		= { XHG_AG,  XFS_SICK_AG_AGFL },
+	[XFS_SCRUB_TYPE_AGI]		= { XHG_AG,  XFS_SICK_AG_AGI },
+	[XFS_SCRUB_TYPE_BNOBT]		= { XHG_AG,  XFS_SICK_AG_BNOBT },
+	[XFS_SCRUB_TYPE_CNTBT]		= { XHG_AG,  XFS_SICK_AG_CNTBT },
+	[XFS_SCRUB_TYPE_INOBT]		= { XHG_AG,  XFS_SICK_AG_INOBT },
+	[XFS_SCRUB_TYPE_FINOBT]		= { XHG_AG,  XFS_SICK_AG_FINOBT },
+	[XFS_SCRUB_TYPE_RMAPBT]		= { XHG_AG,  XFS_SICK_AG_RMAPBT },
+	[XFS_SCRUB_TYPE_REFCNTBT]	= { XHG_AG,  XFS_SICK_AG_REFCNTBT },
+	[XFS_SCRUB_TYPE_INODE]		= { XHG_INO, XFS_SICK_INO_CORE },
+	[XFS_SCRUB_TYPE_BMBTD]		= { XHG_INO, XFS_SICK_INO_BMBTD },
+	[XFS_SCRUB_TYPE_BMBTA]		= { XHG_INO, XFS_SICK_INO_BMBTA },
+	[XFS_SCRUB_TYPE_BMBTC]		= { XHG_INO, XFS_SICK_INO_BMBTC },
+	[XFS_SCRUB_TYPE_DIR]		= { XHG_INO, XFS_SICK_INO_DIR },
+	[XFS_SCRUB_TYPE_XATTR]		= { XHG_INO, XFS_SICK_INO_XATTR },
+	[XFS_SCRUB_TYPE_SYMLINK]	= { XHG_INO, XFS_SICK_INO_SYMLINK },
+	[XFS_SCRUB_TYPE_PARENT]		= { XHG_INO, XFS_SICK_INO_PARENT },
+	[XFS_SCRUB_TYPE_RTBITMAP]	= { XHG_RT,  XFS_SICK_RT_BITMAP },
+	[XFS_SCRUB_TYPE_RTSUM]		= { XHG_RT,  XFS_SICK_RT_SUMMARY },
+	[XFS_SCRUB_TYPE_UQUOTA]		= { XHG_FS,  XFS_SICK_FS_UQUOTA },
+	[XFS_SCRUB_TYPE_GQUOTA]		= { XHG_FS,  XFS_SICK_FS_GQUOTA },
+	[XFS_SCRUB_TYPE_PQUOTA]		= { XHG_FS,  XFS_SICK_FS_PQUOTA },
+	[XFS_SCRUB_TYPE_FSCOUNTERS]	= { XHG_FS,  XFS_SICK_FS_COUNTERS },
+};
+
+/* Return the health status mask for this scrub type. */
+unsigned int
+xchk_health_mask_for_scrub_type(
+	__u32			scrub_type)
+{
+	return type_to_health_flag[scrub_type].sick_mask;
+}
+
+/*
+ * Update filesystem health assessments based on what we found and did.
+ *
+ * If the scrubber finds errors, we mark sick whatever's mentioned in
+ * sick_mask, no matter whether this is a first scan or an
+ * evaluation of repair effectiveness.
+ *
+ * Otherwise, no direct corruption was found, so mark whatever's in
+ * sick_mask as healthy.
+ */
+void
+xchk_update_health(
+	struct xfs_scrub	*sc)
+{
+	struct xfs_perag	*pag;
+	bool			bad;
+
+	if (!sc->sick_mask)
+		return;
+
+	bad = (sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT);
+	switch (type_to_health_flag[sc->sm->sm_type].group) {
+	case XHG_AG:
+		pag = xfs_perag_get(sc->mp, sc->sm->sm_agno);
+		if (bad)
+			xfs_ag_mark_sick(pag, sc->sick_mask);
+		else
+			xfs_ag_mark_healthy(pag, sc->sick_mask);
+		xfs_perag_put(pag);
+		break;
+	case XHG_INO:
+		if (!sc->ip)
+			return;
+		if (bad)
+			xfs_inode_mark_sick(sc->ip, sc->sick_mask);
+		else
+			xfs_inode_mark_healthy(sc->ip, sc->sick_mask);
+		break;
+	case XHG_FS:
+		if (bad)
+			xfs_fs_mark_sick(sc->mp, sc->sick_mask);
+		else
+			xfs_fs_mark_healthy(sc->mp, sc->sick_mask);
+		break;
+	case XHG_RT:
+		if (bad)
+			xfs_rt_mark_sick(sc->mp, sc->sick_mask);
+		else
+			xfs_rt_mark_healthy(sc->mp, sc->sick_mask);
+		break;
+	default:
+		ASSERT(0);
+		break;
+	}
+}
+
+/* Is the given per-AG btree healthy enough for scanning? */
+bool
+xchk_ag_btree_healthy_enough(
+	struct xfs_scrub	*sc,
+	struct xfs_perag	*pag,
+	xfs_btnum_t		btnum)
+{
+	unsigned int		mask = 0;
+
+	/*
+	 * We always want the cursor if it's the same type as whatever we're
+	 * scrubbing, even if we already know the structure is corrupt.
+	 *
+	 * Otherwise, we're only interested in the btree for cross-referencing.
+	 * If we know the btree is bad then don't bother, just set XFAIL.
+	 */
+	switch (btnum) {
+	case XFS_BTNUM_BNO:
+		if (sc->sm->sm_type == XFS_SCRUB_TYPE_BNOBT)
+			return true;
+		mask = XFS_SICK_AG_BNOBT;
+		break;
+	case XFS_BTNUM_CNT:
+		if (sc->sm->sm_type == XFS_SCRUB_TYPE_CNTBT)
+			return true;
+		mask = XFS_SICK_AG_CNTBT;
+		break;
+	case XFS_BTNUM_INO:
+		if (sc->sm->sm_type == XFS_SCRUB_TYPE_INOBT)
+			return true;
+		mask = XFS_SICK_AG_INOBT;
+		break;
+	case XFS_BTNUM_FINO:
+		if (sc->sm->sm_type == XFS_SCRUB_TYPE_FINOBT)
+			return true;
+		mask = XFS_SICK_AG_FINOBT;
+		break;
+	case XFS_BTNUM_RMAP:
+		if (sc->sm->sm_type == XFS_SCRUB_TYPE_RMAPBT)
+			return true;
+		mask = XFS_SICK_AG_RMAPBT;
+		break;
+	case XFS_BTNUM_REFC:
+		if (sc->sm->sm_type == XFS_SCRUB_TYPE_REFCNTBT)
+			return true;
+		mask = XFS_SICK_AG_REFCNTBT;
+		break;
+	default:
+		ASSERT(0);
+		return true;
+	}
+
+	if (xfs_ag_has_sickness(pag, mask)) {
+		sc->sm->sm_flags |= XFS_SCRUB_OFLAG_XFAIL;
+		return false;
+	}
+
+	return true;
+}
diff --git a/fs/xfs/scrub/health.h b/fs/xfs/scrub/health.h
new file mode 100644
index 000000000000..d0b938d3d028
--- /dev/null
+++ b/fs/xfs/scrub/health.h
@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#ifndef __XFS_SCRUB_HEALTH_H__
+#define __XFS_SCRUB_HEALTH_H__
+
+unsigned int xchk_health_mask_for_scrub_type(__u32 scrub_type);
+void xchk_update_health(struct xfs_scrub *sc);
+bool xchk_ag_btree_healthy_enough(struct xfs_scrub *sc, struct xfs_perag *pag,
+		xfs_btnum_t btnum);
+
+#endif /* __XFS_SCRUB_HEALTH_H__ */
diff --git a/fs/xfs/scrub/ialloc.c b/fs/xfs/scrub/ialloc.c
index 882dc56c5c21..681758704fda 100644
--- a/fs/xfs/scrub/ialloc.c
+++ b/fs/xfs/scrub/ialloc.c
@@ -9,21 +9,14 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
-#include "xfs_alloc.h"
 #include "xfs_ialloc.h"
 #include "xfs_ialloc_btree.h"
 #include "xfs_icache.h"
 #include "xfs_rmap.h"
-#include "xfs_log.h"
-#include "xfs_trans_priv.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/btree.h"
@@ -39,7 +32,7 @@ xchk_setup_ag_iallocbt(
 	struct xfs_scrub	*sc,
 	struct xfs_inode	*ip)
 {
-	return xchk_setup_ag_btree(sc, ip, sc->try_harder);
+	return xchk_setup_ag_btree(sc, ip, sc->flags & XCHK_TRY_HARDER);
 }
 
 /* Inode btree scrubber. */
@@ -47,6 +40,12 @@ xchk_setup_ag_iallocbt(
 struct xchk_iallocbt {
 	/* Number of inodes we see while scanning inobt. */
 	unsigned long long	inodes;
+
+	/* Expected next startino, for big block filesystems. */
+	xfs_agino_t		next_startino;
+
+	/* Expected end of the current inode cluster. */
+	xfs_agino_t		next_cluster_ino;
 };
 
 /*
@@ -128,42 +127,58 @@ xchk_iallocbt_freecount(
 	return hweight64(freemask);
 }
 
-/* Check a particular inode with ir_free. */
+/*
+ * Check that an inode's allocation status matches ir_free in the inobt
+ * record.  First we try querying the in-core inode state, and if the inode
+ * isn't loaded we examine the on-disk inode directly.
+ *
+ * Since there can be 1:M and M:1 mappings between inobt records and inode
+ * clusters, we pass in the inode location information as an inobt record;
+ * the index of an inode cluster within the inobt record (as well as the
+ * cluster buffer itself); and the index of the inode within the cluster.
+ *
+ * @irec is the inobt record.
+ * @irec_ino is the inode offset from the start of the record.
+ * @dip is the on-disk inode.
+ */
 STATIC int
-xchk_iallocbt_check_cluster_freemask(
+xchk_iallocbt_check_cluster_ifree(
 	struct xchk_btree		*bs,
-	xfs_ino_t			fsino,
-	xfs_agino_t			chunkino,
-	xfs_agino_t			clusterino,
 	struct xfs_inobt_rec_incore	*irec,
-	struct xfs_buf			*bp)
+	unsigned int			irec_ino,
+	struct xfs_dinode		*dip)
 {
-	struct xfs_dinode		*dip;
 	struct xfs_mount		*mp = bs->cur->bc_mp;
-	bool				inode_is_free = false;
+	xfs_ino_t			fsino;
+	xfs_agino_t			agino;
+	bool				irec_free;
+	bool				ino_inuse;
 	bool				freemask_ok;
-	bool				inuse;
 	int				error = 0;
 
 	if (xchk_should_terminate(bs->sc, &error))
 		return error;
 
-	dip = xfs_buf_offset(bp, clusterino * mp->m_sb.sb_inodesize);
+	/*
+	 * Given an inobt record and the offset of an inode from the start of
+	 * the record, compute which fs inode we're talking about.
+	 */
+	agino = irec->ir_startino + irec_ino;
+	fsino = XFS_AGINO_TO_INO(mp, bs->cur->bc_private.a.agno, agino);
+	irec_free = (irec->ir_free & XFS_INOBT_MASK(irec_ino));
+
 	if (be16_to_cpu(dip->di_magic) != XFS_DINODE_MAGIC ||
-	    (dip->di_version >= 3 &&
-	     be64_to_cpu(dip->di_ino) != fsino + clusterino)) {
+	    (dip->di_version >= 3 && be64_to_cpu(dip->di_ino) != fsino)) {
 		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
 		goto out;
 	}
 
-	if (irec->ir_free & XFS_INOBT_MASK(chunkino + clusterino))
-		inode_is_free = true;
-	error = xfs_icache_inode_is_allocated(mp, bs->cur->bc_tp,
-			fsino + clusterino, &inuse);
+	error = xfs_icache_inode_is_allocated(mp, bs->cur->bc_tp, fsino,
+			&ino_inuse);
 	if (error == -ENODATA) {
 		/* Not cached, just read the disk buffer */
-		freemask_ok = inode_is_free ^ !!(dip->di_mode);
-		if (!bs->sc->try_harder && !freemask_ok)
+		freemask_ok = irec_free ^ !!(dip->di_mode);
+		if (!(bs->sc->flags & XCHK_TRY_HARDER) && !freemask_ok)
 			return -EDEADLOCK;
 	} else if (error < 0) {
 		/*
@@ -174,7 +189,7 @@ xchk_iallocbt_check_cluster_freemask(
 		goto out;
 	} else {
 		/* Inode is all there. */
-		freemask_ok = inode_is_free ^ inuse;
+		freemask_ok = irec_free ^ ino_inuse;
 	}
 	if (!freemask_ok)
 		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
@@ -182,86 +197,223 @@ out:
 	return 0;
 }
 
-/* Make sure the free mask is consistent with what the inodes think. */
+/*
+ * Check that the holemask and freemask of a hypothetical inode cluster match
+ * what's actually on disk.  If sparse inodes are enabled, the cluster does
+ * not actually have to map to inodes if the corresponding holemask bit is set.
+ *
+ * @cluster_base is the first inode in the cluster within the @irec.
+ */
 STATIC int
-xchk_iallocbt_check_freemask(
+xchk_iallocbt_check_cluster(
 	struct xchk_btree		*bs,
-	struct xfs_inobt_rec_incore	*irec)
+	struct xfs_inobt_rec_incore	*irec,
+	unsigned int			cluster_base)
 {
 	struct xfs_imap			imap;
 	struct xfs_mount		*mp = bs->cur->bc_mp;
 	struct xfs_dinode		*dip;
-	struct xfs_buf			*bp;
-	xfs_ino_t			fsino;
-	xfs_agino_t			nr_inodes;
-	xfs_agino_t			agino;
-	xfs_agino_t			chunkino;
-	xfs_agino_t			clusterino;
+	struct xfs_buf			*cluster_bp;
+	unsigned int			nr_inodes;
+	xfs_agnumber_t			agno = bs->cur->bc_private.a.agno;
 	xfs_agblock_t			agbno;
-	uint16_t			holemask;
+	unsigned int			cluster_index;
+	uint16_t			cluster_mask = 0;
 	uint16_t			ir_holemask;
 	int				error = 0;
 
-	/* Make sure the freemask matches the inode records. */
-	nr_inodes = mp->m_inodes_per_cluster;
-
-	for (agino = irec->ir_startino;
-	     agino < irec->ir_startino + XFS_INODES_PER_CHUNK;
-	     agino += mp->m_inodes_per_cluster) {
-		fsino = XFS_AGINO_TO_INO(mp, bs->cur->bc_private.a.agno, agino);
-		chunkino = agino - irec->ir_startino;
-		agbno = XFS_AGINO_TO_AGBNO(mp, agino);
-
-		/* Compute the holemask mask for this cluster. */
-		for (clusterino = 0, holemask = 0; clusterino < nr_inodes;
-		     clusterino += XFS_INODES_PER_HOLEMASK_BIT)
-			holemask |= XFS_INOBT_MASK((chunkino + clusterino) /
-					XFS_INODES_PER_HOLEMASK_BIT);
-
-		/* The whole cluster must be a hole or not a hole. */
-		ir_holemask = (irec->ir_holemask & holemask);
-		if (ir_holemask != holemask && ir_holemask != 0) {
+	nr_inodes = min_t(unsigned int, XFS_INODES_PER_CHUNK,
+			M_IGEO(mp)->inodes_per_cluster);
+
+	/* Map this inode cluster */
+	agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino + cluster_base);
+
+	/* Compute a bitmask for this cluster that can be used for holemask. */
+	for (cluster_index = 0;
+	     cluster_index < nr_inodes;
+	     cluster_index += XFS_INODES_PER_HOLEMASK_BIT)
+		cluster_mask |= XFS_INOBT_MASK((cluster_base + cluster_index) /
+				XFS_INODES_PER_HOLEMASK_BIT);
+
+	/*
+	 * Map the first inode of this cluster to a buffer and offset.
+	 * Be careful about inobt records that don't align with the start of
+	 * the inode buffer when block sizes are large enough to hold multiple
+	 * inode chunks.  When this happens, cluster_base will be zero but
+	 * ir_startino can be large enough to make im_boffset nonzero.
+	 */
+	ir_holemask = (irec->ir_holemask & cluster_mask);
+	imap.im_blkno = XFS_AGB_TO_DADDR(mp, agno, agbno);
+	imap.im_len = XFS_FSB_TO_BB(mp, M_IGEO(mp)->blocks_per_cluster);
+	imap.im_boffset = XFS_INO_TO_OFFSET(mp, irec->ir_startino) <<
+			mp->m_sb.sb_inodelog;
+
+	if (imap.im_boffset != 0 && cluster_base != 0) {
+		ASSERT(imap.im_boffset == 0 || cluster_base == 0);
+		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
+		return 0;
+	}
+
+	trace_xchk_iallocbt_check_cluster(mp, agno, irec->ir_startino,
+			imap.im_blkno, imap.im_len, cluster_base, nr_inodes,
+			cluster_mask, ir_holemask,
+			XFS_INO_TO_OFFSET(mp, irec->ir_startino +
+					  cluster_base));
+
+	/* The whole cluster must be a hole or not a hole. */
+	if (ir_holemask != cluster_mask && ir_holemask != 0) {
+		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
+		return 0;
+	}
+
+	/* If any part of this is a hole, skip it. */
+	if (ir_holemask) {
+		xchk_xref_is_not_owned_by(bs->sc, agbno,
+				M_IGEO(mp)->blocks_per_cluster,
+				&XFS_RMAP_OINFO_INODES);
+		return 0;
+	}
+
+	xchk_xref_is_owned_by(bs->sc, agbno, M_IGEO(mp)->blocks_per_cluster,
+			&XFS_RMAP_OINFO_INODES);
+
+	/* Grab the inode cluster buffer. */
+	error = xfs_imap_to_bp(mp, bs->cur->bc_tp, &imap, &dip, &cluster_bp,
+			0, 0);
+	if (!xchk_btree_xref_process_error(bs->sc, bs->cur, 0, &error))
+		return error;
+
+	/* Check free status of each inode within this cluster. */
+	for (cluster_index = 0; cluster_index < nr_inodes; cluster_index++) {
+		struct xfs_dinode	*dip;
+
+		if (imap.im_boffset >= BBTOB(cluster_bp->b_length)) {
 			xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
-			continue;
+			break;
 		}
 
-		/* If any part of this is a hole, skip it. */
-		if (ir_holemask) {
-			xchk_xref_is_not_owned_by(bs->sc, agbno,
-					mp->m_blocks_per_cluster,
-					&XFS_RMAP_OINFO_INODES);
-			continue;
+		dip = xfs_buf_offset(cluster_bp, imap.im_boffset);
+		error = xchk_iallocbt_check_cluster_ifree(bs, irec,
+				cluster_base + cluster_index, dip);
+		if (error)
+			break;
+		imap.im_boffset += mp->m_sb.sb_inodesize;
+	}
+
+	xfs_trans_brelse(bs->cur->bc_tp, cluster_bp);
+	return error;
+}
+
+/*
+ * For all the inode clusters that could map to this inobt record, make sure
+ * that the holemask makes sense and that the allocation status of each inode
+ * matches the freemask.
+ */
+STATIC int
+xchk_iallocbt_check_clusters(
+	struct xchk_btree		*bs,
+	struct xfs_inobt_rec_incore	*irec)
+{
+	unsigned int			cluster_base;
+	int				error = 0;
+
+	/*
+	 * For the common case where this inobt record maps to multiple inode
+	 * clusters this will call _check_cluster for each cluster.
+	 *
+	 * For the case that multiple inobt records map to a single cluster,
+	 * this will call _check_cluster once.
+	 */
+	for (cluster_base = 0;
+	     cluster_base < XFS_INODES_PER_CHUNK;
+	     cluster_base += M_IGEO(bs->sc->mp)->inodes_per_cluster) {
+		error = xchk_iallocbt_check_cluster(bs, irec, cluster_base);
+		if (error)
+			break;
+	}
+
+	return error;
+}
+
+/*
+ * Make sure this inode btree record is aligned properly.  Because a fs block
+ * contains multiple inodes, we check that the inobt record is aligned to the
+ * correct inode, not just the correct block on disk.  This results in a finer
+ * grained corruption check.
+ */
+STATIC void
+xchk_iallocbt_rec_alignment(
+	struct xchk_btree		*bs,
+	struct xfs_inobt_rec_incore	*irec)
+{
+	struct xfs_mount		*mp = bs->sc->mp;
+	struct xchk_iallocbt		*iabt = bs->private;
+	struct xfs_ino_geometry		*igeo = M_IGEO(mp);
+
+	/*
+	 * finobt records have different positioning requirements than inobt
+	 * records: each finobt record must have a corresponding inobt record.
+	 * That is checked in the xref function, so for now we only catch the
+	 * obvious case where the record isn't at all aligned properly.
+	 *
+	 * Note that if a fs block contains more than a single chunk of inodes,
+	 * we will have finobt records only for those chunks containing free
+	 * inodes, and therefore expect chunk alignment of finobt records.
+	 * Otherwise, we expect that the finobt record is aligned to the
+	 * cluster alignment as told by the superblock.
+	 */
+	if (bs->cur->bc_btnum == XFS_BTNUM_FINO) {
+		unsigned int	imask;
+
+		imask = min_t(unsigned int, XFS_INODES_PER_CHUNK,
+				igeo->cluster_align_inodes) - 1;
+		if (irec->ir_startino & imask)
+			xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
+		return;
+	}
+
+	if (iabt->next_startino != NULLAGINO) {
+		/*
+		 * We're midway through a cluster of inodes that is mapped by
+		 * multiple inobt records.  Did we get the record for the next
+		 * irec in the sequence?
+		 */
+		if (irec->ir_startino != iabt->next_startino) {
+			xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
+			return;
 		}
 
-		xchk_xref_is_owned_by(bs->sc, agbno, mp->m_blocks_per_cluster,
-				&XFS_RMAP_OINFO_INODES);
+		iabt->next_startino += XFS_INODES_PER_CHUNK;
 
-		/* Grab the inode cluster buffer. */
-		imap.im_blkno = XFS_AGB_TO_DADDR(mp, bs->cur->bc_private.a.agno,
-				agbno);
-		imap.im_len = XFS_FSB_TO_BB(mp, mp->m_blocks_per_cluster);
-		imap.im_boffset = 0;
-
-		error = xfs_imap_to_bp(mp, bs->cur->bc_tp, &imap,
-				&dip, &bp, 0, 0);
-		if (!xchk_btree_xref_process_error(bs->sc, bs->cur, 0,
-				&error))
-			continue;
-
-		/* Which inodes are free? */
-		for (clusterino = 0; clusterino < nr_inodes; clusterino++) {
-			error = xchk_iallocbt_check_cluster_freemask(bs,
-					fsino, chunkino, clusterino, irec, bp);
-			if (error) {
-				xfs_trans_brelse(bs->cur->bc_tp, bp);
-				return error;
-			}
+		/* Are we done with the cluster? */
+		if (iabt->next_startino >= iabt->next_cluster_ino) {
+			iabt->next_startino = NULLAGINO;
+			iabt->next_cluster_ino = NULLAGINO;
 		}
+		return;
+	}
+
+	/* inobt records must be aligned to cluster and inoalignmnt size. */
+	if (irec->ir_startino & (igeo->cluster_align_inodes - 1)) {
+		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
+		return;
+	}
 
-		xfs_trans_brelse(bs->cur->bc_tp, bp);
+	if (irec->ir_startino & (igeo->inodes_per_cluster - 1)) {
+		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
+		return;
 	}
 
-	return error;
+	if (igeo->inodes_per_cluster <= XFS_INODES_PER_CHUNK)
+		return;
+
+	/*
+	 * If this is the start of an inode cluster that can be mapped by
+	 * multiple inobt records, the next inobt record must follow exactly
+	 * after this one.
+	 */
+	iabt->next_startino = irec->ir_startino + XFS_INODES_PER_CHUNK;
+	iabt->next_cluster_ino = irec->ir_startino + igeo->inodes_per_cluster;
 }
 
 /* Scrub an inobt/finobt record. */
@@ -276,7 +428,6 @@ xchk_iallocbt_rec(
 	uint64_t			holes;
 	xfs_agnumber_t			agno = bs->cur->bc_private.a.agno;
 	xfs_agino_t			agino;
-	xfs_agblock_t			agbno;
 	xfs_extlen_t			len;
 	int				holecount;
 	int				i;
@@ -303,11 +454,9 @@ xchk_iallocbt_rec(
 		goto out;
 	}
 
-	/* Make sure this record is aligned to cluster and inoalignmnt size. */
-	agbno = XFS_AGINO_TO_AGBNO(mp, irec.ir_startino);
-	if ((agbno & (mp->m_cluster_align - 1)) ||
-	    (agbno & (mp->m_blocks_per_cluster - 1)))
-		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
+	xchk_iallocbt_rec_alignment(bs, &irec);
+	if (bs->sc->sm->sm_flags & XFS_SCRUB_OFLAG_CORRUPT)
+		goto out;
 
 	iabt->inodes += irec.ir_count;
 
@@ -320,7 +469,7 @@ xchk_iallocbt_rec(
 
 		if (!xchk_iallocbt_chunk(bs, &irec, agino, len))
 			goto out;
-		goto check_freemask;
+		goto check_clusters;
 	}
 
 	/* Check each chunk of a sparse inode cluster. */
@@ -346,8 +495,8 @@ xchk_iallocbt_rec(
 	    holecount + irec.ir_count != XFS_INODES_PER_CHUNK)
 		xchk_btree_set_corrupt(bs->sc, bs->cur, 0);
 
-check_freemask:
-	error = xchk_iallocbt_check_freemask(bs, &irec);
+check_clusters:
+	error = xchk_iallocbt_check_clusters(bs, &irec);
 	if (error)
 		goto out;
 
@@ -429,6 +578,8 @@ xchk_iallocbt(
 	struct xfs_btree_cur	*cur;
 	struct xchk_iallocbt	iabt = {
 		.inodes		= 0,
+		.next_startino	= NULLAGINO,
+		.next_cluster_ino = NULLAGINO,
 	};
 	int			error;
 
diff --git a/fs/xfs/scrub/inode.c b/fs/xfs/scrub/inode.c
index e213efc194a1..6d483ab29e63 100644
--- a/fs/xfs/scrub/inode.c
+++ b/fs/xfs/scrub/inode.c
@@ -9,27 +9,17 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
-#include "xfs_icache.h"
-#include "xfs_inode_buf.h"
-#include "xfs_inode_fork.h"
 #include "xfs_ialloc.h"
 #include "xfs_da_format.h"
 #include "xfs_reflink.h"
 #include "xfs_rmap.h"
-#include "xfs_bmap.h"
 #include "xfs_bmap_util.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/btree.h"
-#include "scrub/trace.h"
 
 /*
  * Grab total control of the inode metadata.  It doesn't matter here if
diff --git a/fs/xfs/scrub/parent.c b/fs/xfs/scrub/parent.c
index 1c9d7c7f64f5..c962bd534690 100644
--- a/fs/xfs/scrub/parent.c
+++ b/fs/xfs/scrub/parent.c
@@ -9,21 +9,13 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
 #include "xfs_icache.h"
 #include "xfs_dir2.h"
 #include "xfs_dir2_priv.h"
-#include "xfs_ialloc.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
-#include "scrub/trace.h"
 
 /* Set us up to scrub parents. */
 int
@@ -320,7 +312,7 @@ out:
 	 * If we failed to lock the parent inode even after a retry, just mark
 	 * this scrub incomplete and return.
 	 */
-	if (sc->try_harder && error == -EDEADLOCK) {
+	if ((sc->flags & XCHK_TRY_HARDER) && error == -EDEADLOCK) {
 		error = 0;
 		xchk_set_incomplete(sc);
 	}
diff --git a/fs/xfs/scrub/quota.c b/fs/xfs/scrub/quota.c
index 782d582d3edd..0a33b4421c32 100644
--- a/fs/xfs/scrub/quota.c
+++ b/fs/xfs/scrub/quota.c
@@ -9,24 +9,13 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
-#include "xfs_inode_fork.h"
-#include "xfs_alloc.h"
-#include "xfs_bmap.h"
 #include "xfs_quota.h"
 #include "xfs_qm.h"
-#include "xfs_dquot.h"
-#include "xfs_dquot_item.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
-#include "scrub/trace.h"
 
 /* Convert a scrub type code to a DQ flag, or return 0 if error. */
 static inline uint
@@ -60,7 +49,7 @@ xchk_setup_quota(
 	dqtype = xchk_quota_to_dqtype(sc);
 	if (dqtype == 0)
 		return -EINVAL;
-	sc->has_quotaofflock = true;
+	sc->flags |= XCHK_HAS_QUOTAOFFLOCK;
 	mutex_lock(&sc->mp->m_quotainfo->qi_quotaofflock);
 	if (!xfs_this_quota_on(sc->mp, dqtype))
 		return -ENOENT;
@@ -144,7 +133,7 @@ xchk_quota_item(
 	if (bsoft > bhard)
 		xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
 
-	if (ihard > mp->m_maxicount)
+	if (ihard > M_IGEO(mp)->maxicount)
 		xchk_fblock_set_warning(sc, XFS_DATA_FORK, offset);
 	if (isoft > ihard)
 		xchk_fblock_set_corrupt(sc, XFS_DATA_FORK, offset);
diff --git a/fs/xfs/scrub/refcount.c b/fs/xfs/scrub/refcount.c
index 708b4158eb90..93b3793bc5b3 100644
--- a/fs/xfs/scrub/refcount.c
+++ b/fs/xfs/scrub/refcount.c
@@ -7,22 +7,12 @@
 #include "xfs_fs.h"
 #include "xfs_shared.h"
 #include "xfs_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
-#include "xfs_log_format.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_alloc.h"
 #include "xfs_rmap.h"
 #include "xfs_refcount.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/btree.h"
-#include "scrub/trace.h"
 
 /*
  * Set us up to scrub reference count btrees.
diff --git a/fs/xfs/scrub/repair.c b/fs/xfs/scrub/repair.c
index 6acf1bfa0bfe..4cfeec57fb05 100644
--- a/fs/xfs/scrub/repair.c
+++ b/fs/xfs/scrub/repair.c
@@ -9,29 +9,21 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
 #include "xfs_sb.h"
 #include "xfs_inode.h"
-#include "xfs_icache.h"
 #include "xfs_alloc.h"
 #include "xfs_alloc_btree.h"
 #include "xfs_ialloc.h"
 #include "xfs_ialloc_btree.h"
 #include "xfs_rmap.h"
 #include "xfs_rmap_btree.h"
-#include "xfs_refcount.h"
 #include "xfs_refcount_btree.h"
 #include "xfs_extent_busy.h"
 #include "xfs_ag_resv.h"
-#include "xfs_trans_space.h"
 #include "xfs_quota.h"
-#include "xfs_attr.h"
-#include "xfs_reflink.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/trace.h"
@@ -46,8 +38,7 @@
 int
 xrep_attempt(
 	struct xfs_inode	*ip,
-	struct xfs_scrub	*sc,
-	bool			*fixed)
+	struct xfs_scrub	*sc)
 {
 	int			error = 0;
 
@@ -66,13 +57,13 @@ xrep_attempt(
 		 * scrub so that we can tell userspace if we fixed the problem.
 		 */
 		sc->sm->sm_flags &= ~XFS_SCRUB_FLAGS_OUT;
-		*fixed = true;
+		sc->flags |= XREP_ALREADY_FIXED;
 		return -EAGAIN;
 	case -EDEADLOCK:
 	case -EAGAIN:
 		/* Tell the caller to try again having grabbed all the locks. */
-		if (!sc->try_harder) {
-			sc->try_harder = true;
+		if (!(sc->flags & XCHK_TRY_HARDER)) {
+			sc->flags |= XCHK_TRY_HARDER;
 			return -EAGAIN;
 		}
 		/*
@@ -137,10 +128,16 @@ xrep_roll_ag_trans(
 	if (sc->sa.agfl_bp)
 		xfs_trans_bhold(sc->tp, sc->sa.agfl_bp);
 
-	/* Roll the transaction. */
+	/*
+	 * Roll the transaction.  We still own the buffer and the buffer lock
+	 * regardless of whether or not the roll succeeds.  If the roll fails,
+	 * the buffers will be released during teardown on our way out of the
+	 * kernel.  If it succeeds, we join them to the new transaction and
+	 * move on.
+	 */
 	error = xfs_trans_roll(&sc->tp);
 	if (error)
-		goto out_release;
+		return error;
 
 	/* Join AG headers to the new transaction. */
 	if (sc->sa.agi_bp)
@@ -151,21 +148,6 @@ xrep_roll_ag_trans(
 		xfs_trans_bjoin(sc->tp, sc->sa.agfl_bp);
 
 	return 0;
-
-out_release:
-	/*
-	 * Rolling failed, so release the hold on the buffers.  The
-	 * buffers will be released during teardown on our way out
-	 * of the kernel.
-	 */
-	if (sc->sa.agi_bp)
-		xfs_trans_bhold_release(sc->tp, sc->sa.agi_bp);
-	if (sc->sa.agf_bp)
-		xfs_trans_bhold_release(sc->tp, sc->sa.agf_bp);
-	if (sc->sa.agfl_bp)
-		xfs_trans_bhold_release(sc->tp, sc->sa.agfl_bp);
-
-	return error;
 }
 
 /*
@@ -367,7 +349,7 @@ xrep_init_btblock(
 	bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, XFS_FSB_TO_DADDR(mp, fsb),
 			XFS_FSB_TO_BB(mp, 1), 0);
 	xfs_buf_zero(bp, 0, BBTOB(bp->b_length));
-	xfs_btree_init_block(mp, bp, btnum, 0, 0, sc->sa.agno, 0);
+	xfs_btree_init_block(mp, bp, btnum, 0, 0, sc->sa.agno);
 	xfs_trans_buf_set_type(tp, bp, XFS_BLFT_BTREE_BUF);
 	xfs_trans_log_buf(tp, bp, 0, bp->b_length);
 	bp->b_ops = ops;
@@ -682,7 +664,7 @@ xrep_findroot_agfl_walk(
 {
 	xfs_agblock_t		*agbno = priv;
 
-	return (*agbno == bno) ? XFS_BTREE_QUERY_RANGE_ABORT : 0;
+	return (*agbno == bno) ? XFS_ITER_ABORT : 0;
 }
 
 /* Does this block match the btree information passed in? */
@@ -712,7 +694,7 @@ xrep_findroot_block(
 	if (owner == XFS_RMAP_OWN_AG) {
 		error = xfs_agfl_walk(mp, ri->agf, ri->agfl_bp,
 				xrep_findroot_agfl_walk, &agbno);
-		if (error == XFS_BTREE_QUERY_RANGE_ABORT)
+		if (error == XFS_ITER_ABORT)
 			return 0;
 		if (error)
 			return error;
@@ -743,7 +725,8 @@ xrep_findroot_block(
 
 	/* Ensure the block magic matches the btree type we're looking for. */
 	btblock = XFS_BUF_TO_BLOCK(bp);
-	if (be32_to_cpu(btblock->bb_magic) != fab->magic)
+	ASSERT(fab->buf_ops->magic[1] != 0);
+	if (btblock->bb_magic != fab->buf_ops->magic[1])
 		goto out;
 
 	/*
diff --git a/fs/xfs/scrub/repair.h b/fs/xfs/scrub/repair.h
index f2fc18bb7605..60c61d7052a8 100644
--- a/fs/xfs/scrub/repair.h
+++ b/fs/xfs/scrub/repair.h
@@ -15,7 +15,7 @@ static inline int xrep_notsupported(struct xfs_scrub *sc)
 
 /* Repair helpers */
 
-int xrep_attempt(struct xfs_inode *ip, struct xfs_scrub *sc, bool *fixed);
+int xrep_attempt(struct xfs_inode *ip, struct xfs_scrub *sc);
 void xrep_failure(struct xfs_mount *mp);
 int xrep_roll_ag_trans(struct xfs_scrub *sc);
 bool xrep_ag_has_space(struct xfs_perag *pag, xfs_extlen_t nr_blocks,
@@ -42,9 +42,6 @@ struct xrep_find_ag_btree {
 	/* in: buffer ops */
 	const struct xfs_buf_ops	*buf_ops;
 
-	/* in: magic number of the btree */
-	uint32_t			magic;
-
 	/* out: the highest btree block found and the tree height */
 	xfs_agblock_t			root;
 	unsigned int			height;
@@ -67,8 +64,7 @@ int xrep_agi(struct xfs_scrub *sc);
 
 static inline int xrep_attempt(
 	struct xfs_inode	*ip,
-	struct xfs_scrub	*sc,
-	bool			*fixed)
+	struct xfs_scrub	*sc)
 {
 	return -EOPNOTSUPP;
 }
diff --git a/fs/xfs/scrub/rmap.c b/fs/xfs/scrub/rmap.c
index 92a140c5b55e..8d4cefd761c1 100644
--- a/fs/xfs/scrub/rmap.c
+++ b/fs/xfs/scrub/rmap.c
@@ -9,21 +9,12 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_btree.h"
-#include "xfs_bit.h"
-#include "xfs_log_format.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_alloc.h"
-#include "xfs_ialloc.h"
 #include "xfs_rmap.h"
 #include "xfs_refcount.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/btree.h"
-#include "scrub/trace.h"
 
 /*
  * Set us up to scrub reverse mapping btrees.
diff --git a/fs/xfs/scrub/rtbitmap.c b/fs/xfs/scrub/rtbitmap.c
index 665d4bbb17cc..c642bc206c41 100644
--- a/fs/xfs/scrub/rtbitmap.c
+++ b/fs/xfs/scrub/rtbitmap.c
@@ -9,19 +9,12 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
-#include "xfs_sb.h"
-#include "xfs_alloc.h"
 #include "xfs_rtalloc.h"
 #include "xfs_inode.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
-#include "scrub/trace.h"
 
 /* Set us up with the realtime metadata locked. */
 int
@@ -141,9 +134,8 @@ xchk_xref_is_used_rt_space(
 	startext = fsbno;
 	endext = fsbno + len - 1;
 	do_div(startext, sc->mp->m_sb.sb_rextsize);
-	if (do_div(endext, sc->mp->m_sb.sb_rextsize))
-		endext++;
-	extcount = endext - startext;
+	do_div(endext, sc->mp->m_sb.sb_rextsize);
+	extcount = endext - startext + 1;
 	xfs_ilock(sc->mp->m_rbmip, XFS_ILOCK_SHARED | XFS_ILOCK_RTBITMAP);
 	error = xfs_rtalloc_extent_is_free(sc->mp, sc->tp, startext, extcount,
 			&is_free);
diff --git a/fs/xfs/scrub/scrub.c b/fs/xfs/scrub/scrub.c
index 1b2344d00525..15c8c5f3f688 100644
--- a/fs/xfs/scrub/scrub.c
+++ b/fs/xfs/scrub/scrub.c
@@ -9,37 +9,18 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
 #include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
-#include "xfs_icache.h"
-#include "xfs_itable.h"
-#include "xfs_alloc.h"
-#include "xfs_alloc_btree.h"
-#include "xfs_bmap.h"
-#include "xfs_bmap_btree.h"
-#include "xfs_ialloc.h"
-#include "xfs_ialloc_btree.h"
-#include "xfs_refcount.h"
-#include "xfs_refcount_btree.h"
-#include "xfs_rmap.h"
-#include "xfs_rmap_btree.h"
 #include "xfs_quota.h"
 #include "xfs_qm.h"
 #include "xfs_errortag.h"
 #include "xfs_error.h"
-#include "xfs_log.h"
-#include "xfs_trans_priv.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
 #include "scrub/trace.h"
-#include "scrub/btree.h"
 #include "scrub/repair.h"
+#include "scrub/health.h"
 
 /*
  * Online Scrub and Repair
@@ -186,8 +167,12 @@ xchk_teardown(
 			xfs_irele(sc->ip);
 		sc->ip = NULL;
 	}
-	if (sc->has_quotaofflock)
+	if (sc->flags & XCHK_REAPING_DISABLED)
+		xchk_start_reaping(sc);
+	if (sc->flags & XCHK_HAS_QUOTAOFFLOCK) {
 		mutex_unlock(&sc->mp->m_quotainfo->qi_quotaofflock);
+		sc->flags &= ~XCHK_HAS_QUOTAOFFLOCK;
+	}
 	if (sc->buf) {
 		kmem_free(sc->buf);
 		sc->buf = NULL;
@@ -347,6 +332,12 @@ static const struct xchk_meta_ops meta_scrub_ops[] = {
 		.scrub	= xchk_quota,
 		.repair	= xrep_notsupported,
 	},
+	[XFS_SCRUB_TYPE_FSCOUNTERS] = {	/* fs summary counters */
+		.type	= ST_FS,
+		.setup	= xchk_setup_fscounters,
+		.scrub	= xchk_fscounters,
+		.repair	= xrep_notsupported,
+	},
 };
 
 /* This isn't a stable feature, warn once per day. */
@@ -466,10 +457,14 @@ xfs_scrub_metadata(
 	struct xfs_inode		*ip,
 	struct xfs_scrub_metadata	*sm)
 {
-	struct xfs_scrub		sc;
+	struct xfs_scrub		sc = {
+		.mp			= ip->i_mount,
+		.sm			= sm,
+		.sa			= {
+			.agno		= NULLAGNUMBER,
+		},
+	};
 	struct xfs_mount		*mp = ip->i_mount;
-	bool				try_harder = false;
-	bool				already_fixed = false;
 	int				error = 0;
 
 	BUILD_BUG_ON(sizeof(meta_scrub_ops) !=
@@ -491,21 +486,17 @@ xfs_scrub_metadata(
 
 	xchk_experimental_warning(mp);
 
+	sc.ops = &meta_scrub_ops[sm->sm_type];
+	sc.sick_mask = xchk_health_mask_for_scrub_type(sm->sm_type);
 retry_op:
 	/* Set up for the operation. */
-	memset(&sc, 0, sizeof(sc));
-	sc.mp = ip->i_mount;
-	sc.sm = sm;
-	sc.ops = &meta_scrub_ops[sm->sm_type];
-	sc.try_harder = try_harder;
-	sc.sa.agno = NULLAGNUMBER;
 	error = sc.ops->setup(&sc, ip);
 	if (error)
 		goto out_teardown;
 
 	/* Scrub for errors. */
 	error = sc.ops->scrub(&sc);
-	if (!try_harder && error == -EDEADLOCK) {
+	if (!(sc.flags & XCHK_TRY_HARDER) && error == -EDEADLOCK) {
 		/*
 		 * Scrubbers return -EDEADLOCK to mean 'try harder'.
 		 * Tear down everything we hold, then set up again with
@@ -514,12 +505,15 @@ retry_op:
 		error = xchk_teardown(&sc, ip, 0);
 		if (error)
 			goto out;
-		try_harder = true;
+		sc.flags |= XCHK_TRY_HARDER;
 		goto retry_op;
 	} else if (error)
 		goto out_teardown;
 
-	if ((sc.sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR) && !already_fixed) {
+	xchk_update_health(&sc);
+
+	if ((sc.sm->sm_flags & XFS_SCRUB_IFLAG_REPAIR) &&
+	    !(sc.flags & XREP_ALREADY_FIXED)) {
 		bool needs_fix;
 
 		/* Let debug users force us into the repair routines. */
@@ -542,10 +536,13 @@ retry_op:
 		 * If it's broken, userspace wants us to fix it, and we haven't
 		 * already tried to fix it, then attempt a repair.
 		 */
-		error = xrep_attempt(ip, &sc, &already_fixed);
+		error = xrep_attempt(ip, &sc);
 		if (error == -EAGAIN) {
-			if (sc.try_harder)
-				try_harder = true;
+			/*
+			 * Either the repair function succeeded or it couldn't
+			 * get all the resources it needs; either way, we go
+			 * back to the beginning and call the scrub function.
+			 */
 			error = xchk_teardown(&sc, ip, 0);
 			if (error) {
 				xrep_failure(mp);
diff --git a/fs/xfs/scrub/scrub.h b/fs/xfs/scrub/scrub.h
index 22f754fba8e5..ad1ceb44a628 100644
--- a/fs/xfs/scrub/scrub.h
+++ b/fs/xfs/scrub/scrub.h
@@ -62,13 +62,27 @@ struct xfs_scrub {
 	struct xfs_inode		*ip;
 	void				*buf;
 	uint				ilock_flags;
-	bool				try_harder;
-	bool				has_quotaofflock;
+
+	/* See the XCHK/XREP state flags below. */
+	unsigned int			flags;
+
+	/*
+	 * The XFS_SICK_* flags that correspond to the metadata being scrubbed
+	 * or repaired.  We will use this mask to update the in-core fs health
+	 * status with whatever we find.
+	 */
+	unsigned int			sick_mask;
 
 	/* State tracking for single-AG operations. */
 	struct xchk_ag			sa;
 };
 
+/* XCHK state flags grow up from zero, XREP state flags grown down from 2^31 */
+#define XCHK_TRY_HARDER		(1 << 0)  /* can't get resources, try again */
+#define XCHK_HAS_QUOTAOFFLOCK	(1 << 1)  /* we hold the quotaoff lock */
+#define XCHK_REAPING_DISABLED	(1 << 2)  /* background block reaping paused */
+#define XREP_ALREADY_FIXED	(1 << 31) /* checking our repair work */
+
 /* Metadata scrubbers */
 int xchk_tester(struct xfs_scrub *sc);
 int xchk_superblock(struct xfs_scrub *sc);
@@ -113,6 +127,7 @@ xchk_quota(struct xfs_scrub *sc)
 	return -ENOENT;
 }
 #endif
+int xchk_fscounters(struct xfs_scrub *sc);
 
 /* cross-referencing helpers */
 void xchk_xref_is_used_space(struct xfs_scrub *sc, xfs_agblock_t agbno,
@@ -138,4 +153,12 @@ void xchk_xref_is_used_rt_space(struct xfs_scrub *sc, xfs_rtblock_t rtbno,
 # define xchk_xref_is_used_rt_space(sc, rtbno, len) do { } while (0)
 #endif
 
+struct xchk_fscounters {
+	uint64_t		icount;
+	uint64_t		ifree;
+	uint64_t		fdblocks;
+	unsigned long long	icount_min;
+	unsigned long long	icount_max;
+};
+
 #endif	/* __XFS_SCRUB_SCRUB_H__ */
diff --git a/fs/xfs/scrub/symlink.c b/fs/xfs/scrub/symlink.c
index f7ebaa946999..99c0b1234c3c 100644
--- a/fs/xfs/scrub/symlink.c
+++ b/fs/xfs/scrub/symlink.c
@@ -9,19 +9,11 @@
 #include "xfs_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_btree.h"
-#include "xfs_bit.h"
 #include "xfs_log_format.h"
-#include "xfs_trans.h"
-#include "xfs_sb.h"
 #include "xfs_inode.h"
-#include "xfs_inode_fork.h"
 #include "xfs_symlink.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
 #include "scrub/common.h"
-#include "scrub/trace.h"
 
 /* Set us up to scrub a symbolic link. */
 int
diff --git a/fs/xfs/scrub/trace.c b/fs/xfs/scrub/trace.c
index 96feaf8dcdec..9eaab2eb5ed3 100644
--- a/fs/xfs/scrub/trace.c
+++ b/fs/xfs/scrub/trace.c
@@ -10,15 +10,9 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_da_format.h"
 #include "xfs_inode.h"
 #include "xfs_btree.h"
-#include "xfs_trans.h"
-#include "xfs_bit.h"
-#include "scrub/xfs_scrub.h"
 #include "scrub/scrub.h"
-#include "scrub/common.h"
 
 /* Figure out which block the btree cursor was pointing to. */
 static inline xfs_fsblock_t
diff --git a/fs/xfs/scrub/trace.h b/fs/xfs/scrub/trace.h
index 8344b14031ef..3362bae28b46 100644
--- a/fs/xfs/scrub/trace.h
+++ b/fs/xfs/scrub/trace.h
@@ -50,6 +50,7 @@ TRACE_DEFINE_ENUM(XFS_SCRUB_TYPE_RTSUM);
 TRACE_DEFINE_ENUM(XFS_SCRUB_TYPE_UQUOTA);
 TRACE_DEFINE_ENUM(XFS_SCRUB_TYPE_GQUOTA);
 TRACE_DEFINE_ENUM(XFS_SCRUB_TYPE_PQUOTA);
+TRACE_DEFINE_ENUM(XFS_SCRUB_TYPE_FSCOUNTERS);
 
 #define XFS_SCRUB_TYPE_STRINGS \
 	{ XFS_SCRUB_TYPE_PROBE,		"probe" }, \
@@ -75,7 +76,8 @@ TRACE_DEFINE_ENUM(XFS_SCRUB_TYPE_PQUOTA);
 	{ XFS_SCRUB_TYPE_RTSUM,		"rtsummary" }, \
 	{ XFS_SCRUB_TYPE_UQUOTA,	"usrquota" }, \
 	{ XFS_SCRUB_TYPE_GQUOTA,	"grpquota" }, \
-	{ XFS_SCRUB_TYPE_PQUOTA,	"prjquota" }
+	{ XFS_SCRUB_TYPE_PQUOTA,	"prjquota" }, \
+	{ XFS_SCRUB_TYPE_FSCOUNTERS,	"fscounters" }
 
 DECLARE_EVENT_CLASS(xchk_class,
 	TP_PROTO(struct xfs_inode *ip, struct xfs_scrub_metadata *sm,
@@ -223,6 +225,7 @@ DEFINE_EVENT(xchk_block_error_class, name, \
 		 void *ret_ip), \
 	TP_ARGS(sc, daddr, ret_ip))
 
+DEFINE_SCRUB_BLOCK_ERROR_EVENT(xchk_fs_error);
 DEFINE_SCRUB_BLOCK_ERROR_EVENT(xchk_block_error);
 DEFINE_SCRUB_BLOCK_ERROR_EVENT(xchk_block_preen);
 
@@ -545,6 +548,109 @@ TRACE_EVENT(xchk_xref_error,
 		  __entry->ret_ip)
 );
 
+TRACE_EVENT(xchk_iallocbt_check_cluster,
+	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno,
+		 xfs_agino_t startino, xfs_daddr_t map_daddr,
+		 unsigned short map_len, unsigned int chunk_ino,
+		 unsigned int nr_inodes, uint16_t cluster_mask,
+		 uint16_t holemask, unsigned int cluster_ino),
+	TP_ARGS(mp, agno, startino, map_daddr, map_len, chunk_ino, nr_inodes,
+		cluster_mask, holemask, cluster_ino),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_agnumber_t, agno)
+		__field(xfs_agino_t, startino)
+		__field(xfs_daddr_t, map_daddr)
+		__field(unsigned short, map_len)
+		__field(unsigned int, chunk_ino)
+		__field(unsigned int, nr_inodes)
+		__field(unsigned int, cluster_ino)
+		__field(uint16_t, cluster_mask)
+		__field(uint16_t, holemask)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->agno = agno;
+		__entry->startino = startino;
+		__entry->map_daddr = map_daddr;
+		__entry->map_len = map_len;
+		__entry->chunk_ino = chunk_ino;
+		__entry->nr_inodes = nr_inodes;
+		__entry->cluster_mask = cluster_mask;
+		__entry->holemask = holemask;
+		__entry->cluster_ino = cluster_ino;
+	),
+	TP_printk("dev %d:%d agno %d startino %u daddr 0x%llx len %d chunkino %u nr_inodes %u cluster_mask 0x%x holemask 0x%x cluster_ino %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->agno,
+		  __entry->startino,
+		  __entry->map_daddr,
+		  __entry->map_len,
+		  __entry->chunk_ino,
+		  __entry->nr_inodes,
+		  __entry->cluster_mask,
+		  __entry->holemask,
+		  __entry->cluster_ino)
+)
+
+TRACE_EVENT(xchk_fscounters_calc,
+	TP_PROTO(struct xfs_mount *mp, uint64_t icount, uint64_t ifree,
+		 uint64_t fdblocks, uint64_t delalloc),
+	TP_ARGS(mp, icount, ifree, fdblocks, delalloc),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(int64_t, icount_sb)
+		__field(uint64_t, icount_calculated)
+		__field(int64_t, ifree_sb)
+		__field(uint64_t, ifree_calculated)
+		__field(int64_t, fdblocks_sb)
+		__field(uint64_t, fdblocks_calculated)
+		__field(uint64_t, delalloc)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->icount_sb = mp->m_sb.sb_icount;
+		__entry->icount_calculated = icount;
+		__entry->ifree_sb = mp->m_sb.sb_ifree;
+		__entry->ifree_calculated = ifree;
+		__entry->fdblocks_sb = mp->m_sb.sb_fdblocks;
+		__entry->fdblocks_calculated = fdblocks;
+		__entry->delalloc = delalloc;
+	),
+	TP_printk("dev %d:%d icount %lld:%llu ifree %lld::%llu fdblocks %lld::%llu delalloc %llu",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->icount_sb,
+		  __entry->icount_calculated,
+		  __entry->ifree_sb,
+		  __entry->ifree_calculated,
+		  __entry->fdblocks_sb,
+		  __entry->fdblocks_calculated,
+		  __entry->delalloc)
+)
+
+TRACE_EVENT(xchk_fscounters_within_range,
+	TP_PROTO(struct xfs_mount *mp, uint64_t expected, int64_t curr_value,
+		 int64_t old_value),
+	TP_ARGS(mp, expected, curr_value, old_value),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(uint64_t, expected)
+		__field(int64_t, curr_value)
+		__field(int64_t, old_value)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->expected = expected;
+		__entry->curr_value = curr_value;
+		__entry->old_value = old_value;
+	),
+	TP_printk("dev %d:%d expected %llu curr_value %lld old_value %lld",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->expected,
+		  __entry->curr_value,
+		  __entry->old_value)
+)
+
 /* repair tracepoints */
 #if IS_ENABLED(CONFIG_XFS_ONLINE_REPAIR)
 
diff --git a/fs/xfs/xfs_acl.c b/fs/xfs/xfs_acl.c
index 8039e35147dd..cbda40d40326 100644
--- a/fs/xfs/xfs_acl.c
+++ b/fs/xfs/xfs_acl.c
@@ -4,16 +4,14 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
-#include "xfs_acl.h"
 #include "xfs_attr.h"
 #include "xfs_trace.h"
-#include <linux/slab.h>
-#include <linux/xattr.h>
 #include <linux/posix_acl_xattr.h>
 
 
diff --git a/fs/xfs/xfs_aops.c b/fs/xfs/xfs_aops.c
index d9048bcea49c..761248ee2778 100644
--- a/fs/xfs/xfs_aops.c
+++ b/fs/xfs/xfs_aops.c
@@ -12,23 +12,19 @@
 #include "xfs_mount.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
-#include "xfs_alloc.h"
-#include "xfs_error.h"
 #include "xfs_iomap.h"
 #include "xfs_trace.h"
 #include "xfs_bmap.h"
 #include "xfs_bmap_util.h"
-#include "xfs_bmap_btree.h"
 #include "xfs_reflink.h"
-#include <linux/writeback.h>
 
 /*
  * structure owned by writepages passed to individual writepage calls
  */
 struct xfs_writepage_ctx {
 	struct xfs_bmbt_irec    imap;
-	unsigned int		io_type;
+	int			fork;
+	unsigned int		data_seq;
 	unsigned int		cow_seq;
 	struct xfs_ioend	*ioend;
 };
@@ -62,7 +58,7 @@ xfs_find_daxdev_for_inode(
 static void
 xfs_finish_page_writeback(
 	struct inode		*inode,
-	struct bio_vec		*bvec,
+	struct bio_vec	*bvec,
 	int			error)
 {
 	struct iomap_page	*iop = to_iomap_page(bvec->bv_page);
@@ -97,7 +93,7 @@ xfs_destroy_ioend(
 
 	for (bio = &ioend->io_inline_bio; bio; bio = next) {
 		struct bio_vec	*bvec;
-		int		i;
+		struct bvec_iter_all iter_all;
 
 		/*
 		 * For the last bio, bi_private points to the ioend, so we
@@ -109,7 +105,7 @@ xfs_destroy_ioend(
 			next = bio->bi_private;
 
 		/* walk each page on bio, ending page IO on them */
-		bio_for_each_segment_all(bvec, bio, i)
+		bio_for_each_segment_all(bvec, bio, iter_all)
 			xfs_finish_page_writeback(inode, bvec, error);
 		bio_put(bio);
 	}
@@ -137,8 +133,7 @@ xfs_setfilesize_trans_alloc(
 	struct xfs_trans	*tp;
 	int			error;
 
-	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0,
-				XFS_TRANS_NOFS, &tp);
+	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_fsyncts, 0, 0, 0, &tp);
 	if (error)
 		return error;
 
@@ -232,17 +227,24 @@ xfs_setfilesize_ioend(
  * IO write completion.
  */
 STATIC void
-xfs_end_io(
-	struct work_struct *work)
+xfs_end_ioend(
+	struct xfs_ioend	*ioend)
 {
-	struct xfs_ioend	*ioend =
-		container_of(work, struct xfs_ioend, io_work);
+	struct list_head	ioend_list;
 	struct xfs_inode	*ip = XFS_I(ioend->io_inode);
 	xfs_off_t		offset = ioend->io_offset;
 	size_t			size = ioend->io_size;
+	unsigned int		nofs_flag;
 	int			error;
 
 	/*
+	 * We can allocate memory here while doing writeback on behalf of
+	 * memory reclaim.  To avoid memory allocation deadlocks set the
+	 * task-wide nofs context for the following operations.
+	 */
+	nofs_flag = memalloc_nofs_save();
+
+	/*
 	 * Just clean up the in-memory strutures if the fs has been shut down.
 	 */
 	if (XFS_FORCED_SHUTDOWN(ip->i_mount)) {
@@ -255,35 +257,140 @@ xfs_end_io(
 	 */
 	error = blk_status_to_errno(ioend->io_bio->bi_status);
 	if (unlikely(error)) {
-		switch (ioend->io_type) {
-		case XFS_IO_COW:
+		if (ioend->io_fork == XFS_COW_FORK)
 			xfs_reflink_cancel_cow_range(ip, offset, size, true);
-			break;
-		}
-
 		goto done;
 	}
 
 	/*
-	 * Success:  commit the COW or unwritten blocks if needed.
+	 * Success: commit the COW or unwritten blocks if needed.
 	 */
-	switch (ioend->io_type) {
-	case XFS_IO_COW:
+	if (ioend->io_fork == XFS_COW_FORK)
 		error = xfs_reflink_end_cow(ip, offset, size);
-		break;
-	case XFS_IO_UNWRITTEN:
-		/* writeback should never update isize */
+	else if (ioend->io_state == XFS_EXT_UNWRITTEN)
 		error = xfs_iomap_write_unwritten(ip, offset, size, false);
-		break;
-	default:
+	else
 		ASSERT(!xfs_ioend_is_append(ioend) || ioend->io_append_trans);
-		break;
-	}
 
 done:
 	if (ioend->io_append_trans)
 		error = xfs_setfilesize_ioend(ioend, error);
+	list_replace_init(&ioend->io_list, &ioend_list);
 	xfs_destroy_ioend(ioend, error);
+
+	while (!list_empty(&ioend_list)) {
+		ioend = list_first_entry(&ioend_list, struct xfs_ioend,
+				io_list);
+		list_del_init(&ioend->io_list);
+		xfs_destroy_ioend(ioend, error);
+	}
+
+	memalloc_nofs_restore(nofs_flag);
+}
+
+/*
+ * We can merge two adjacent ioends if they have the same set of work to do.
+ */
+static bool
+xfs_ioend_can_merge(
+	struct xfs_ioend	*ioend,
+	struct xfs_ioend	*next)
+{
+	if (ioend->io_bio->bi_status != next->io_bio->bi_status)
+		return false;
+	if ((ioend->io_fork == XFS_COW_FORK) ^ (next->io_fork == XFS_COW_FORK))
+		return false;
+	if ((ioend->io_state == XFS_EXT_UNWRITTEN) ^
+	    (next->io_state == XFS_EXT_UNWRITTEN))
+		return false;
+	if (ioend->io_offset + ioend->io_size != next->io_offset)
+		return false;
+	return true;
+}
+
+/*
+ * If the to be merged ioend has a preallocated transaction for file
+ * size updates we need to ensure the ioend it is merged into also
+ * has one.  If it already has one we can simply cancel the transaction
+ * as it is guaranteed to be clean.
+ */
+static void
+xfs_ioend_merge_append_transactions(
+	struct xfs_ioend	*ioend,
+	struct xfs_ioend	*next)
+{
+	if (!ioend->io_append_trans) {
+		ioend->io_append_trans = next->io_append_trans;
+		next->io_append_trans = NULL;
+	} else {
+		xfs_setfilesize_ioend(next, -ECANCELED);
+	}
+}
+
+/* Try to merge adjacent completions. */
+STATIC void
+xfs_ioend_try_merge(
+	struct xfs_ioend	*ioend,
+	struct list_head	*more_ioends)
+{
+	struct xfs_ioend	*next_ioend;
+
+	while (!list_empty(more_ioends)) {
+		next_ioend = list_first_entry(more_ioends, struct xfs_ioend,
+				io_list);
+		if (!xfs_ioend_can_merge(ioend, next_ioend))
+			break;
+		list_move_tail(&next_ioend->io_list, &ioend->io_list);
+		ioend->io_size += next_ioend->io_size;
+		if (next_ioend->io_append_trans)
+			xfs_ioend_merge_append_transactions(ioend, next_ioend);
+	}
+}
+
+/* list_sort compare function for ioends */
+static int
+xfs_ioend_compare(
+	void			*priv,
+	struct list_head	*a,
+	struct list_head	*b)
+{
+	struct xfs_ioend	*ia;
+	struct xfs_ioend	*ib;
+
+	ia = container_of(a, struct xfs_ioend, io_list);
+	ib = container_of(b, struct xfs_ioend, io_list);
+	if (ia->io_offset < ib->io_offset)
+		return -1;
+	else if (ia->io_offset > ib->io_offset)
+		return 1;
+	return 0;
+}
+
+/* Finish all pending io completions. */
+void
+xfs_end_io(
+	struct work_struct	*work)
+{
+	struct xfs_inode	*ip;
+	struct xfs_ioend	*ioend;
+	struct list_head	completion_list;
+	unsigned long		flags;
+
+	ip = container_of(work, struct xfs_inode, i_ioend_work);
+
+	spin_lock_irqsave(&ip->i_ioend_lock, flags);
+	list_replace_init(&ip->i_ioend_list, &completion_list);
+	spin_unlock_irqrestore(&ip->i_ioend_lock, flags);
+
+	list_sort(NULL, &completion_list, xfs_ioend_compare);
+
+	while (!list_empty(&completion_list)) {
+		ioend = list_first_entry(&completion_list, struct xfs_ioend,
+				io_list);
+		list_del_init(&ioend->io_list);
+		xfs_ioend_try_merge(ioend, &completion_list);
+		xfs_end_ioend(ioend);
+	}
 }
 
 STATIC void
@@ -291,16 +398,92 @@ xfs_end_bio(
 	struct bio		*bio)
 {
 	struct xfs_ioend	*ioend = bio->bi_private;
-	struct xfs_mount	*mp = XFS_I(ioend->io_inode)->i_mount;
-
-	if (ioend->io_type == XFS_IO_UNWRITTEN || ioend->io_type == XFS_IO_COW)
-		queue_work(mp->m_unwritten_workqueue, &ioend->io_work);
-	else if (ioend->io_append_trans)
-		queue_work(mp->m_data_workqueue, &ioend->io_work);
-	else
+	struct xfs_inode	*ip = XFS_I(ioend->io_inode);
+	struct xfs_mount	*mp = ip->i_mount;
+	unsigned long		flags;
+
+	if (ioend->io_fork == XFS_COW_FORK ||
+	    ioend->io_state == XFS_EXT_UNWRITTEN ||
+	    ioend->io_append_trans != NULL) {
+		spin_lock_irqsave(&ip->i_ioend_lock, flags);
+		if (list_empty(&ip->i_ioend_list))
+			WARN_ON_ONCE(!queue_work(mp->m_unwritten_workqueue,
+						 &ip->i_ioend_work));
+		list_add_tail(&ioend->io_list, &ip->i_ioend_list);
+		spin_unlock_irqrestore(&ip->i_ioend_lock, flags);
+	} else
 		xfs_destroy_ioend(ioend, blk_status_to_errno(bio->bi_status));
 }
 
+/*
+ * Fast revalidation of the cached writeback mapping. Return true if the current
+ * mapping is valid, false otherwise.
+ */
+static bool
+xfs_imap_valid(
+	struct xfs_writepage_ctx	*wpc,
+	struct xfs_inode		*ip,
+	xfs_fileoff_t			offset_fsb)
+{
+	if (offset_fsb < wpc->imap.br_startoff ||
+	    offset_fsb >= wpc->imap.br_startoff + wpc->imap.br_blockcount)
+		return false;
+	/*
+	 * If this is a COW mapping, it is sufficient to check that the mapping
+	 * covers the offset. Be careful to check this first because the caller
+	 * can revalidate a COW mapping without updating the data seqno.
+	 */
+	if (wpc->fork == XFS_COW_FORK)
+		return true;
+
+	/*
+	 * This is not a COW mapping. Check the sequence number of the data fork
+	 * because concurrent changes could have invalidated the extent. Check
+	 * the COW fork because concurrent changes since the last time we
+	 * checked (and found nothing at this offset) could have added
+	 * overlapping blocks.
+	 */
+	if (wpc->data_seq != READ_ONCE(ip->i_df.if_seq))
+		return false;
+	if (xfs_inode_has_cow_data(ip) &&
+	    wpc->cow_seq != READ_ONCE(ip->i_cowfp->if_seq))
+		return false;
+	return true;
+}
+
+/*
+ * Pass in a dellalloc extent and convert it to real extents, return the real
+ * extent that maps offset_fsb in wpc->imap.
+ *
+ * The current page is held locked so nothing could have removed the block
+ * backing offset_fsb, although it could have moved from the COW to the data
+ * fork by another thread.
+ */
+static int
+xfs_convert_blocks(
+	struct xfs_writepage_ctx *wpc,
+	struct xfs_inode	*ip,
+	xfs_fileoff_t		offset_fsb)
+{
+	int			error;
+
+	/*
+	 * Attempt to allocate whatever delalloc extent currently backs
+	 * offset_fsb and put the result into wpc->imap.  Allocate in a loop
+	 * because it may take several attempts to allocate real blocks for a
+	 * contiguous delalloc extent if free space is sufficiently fragmented.
+	 */
+	do {
+		error = xfs_bmapi_convert_delalloc(ip, wpc->fork, offset_fsb,
+				&wpc->imap, wpc->fork == XFS_COW_FORK ?
+					&wpc->cow_seq : &wpc->data_seq);
+		if (error)
+			return error;
+	} while (wpc->imap.br_startoff + wpc->imap.br_blockcount <= offset_fsb);
+
+	return 0;
+}
+
 STATIC int
 xfs_map_blocks(
 	struct xfs_writepage_ctx *wpc,
@@ -310,26 +493,16 @@ xfs_map_blocks(
 	struct xfs_inode	*ip = XFS_I(inode);
 	struct xfs_mount	*mp = ip->i_mount;
 	ssize_t			count = i_blocksize(inode);
-	xfs_fileoff_t		offset_fsb = XFS_B_TO_FSBT(mp, offset), end_fsb;
+	xfs_fileoff_t		offset_fsb = XFS_B_TO_FSBT(mp, offset);
+	xfs_fileoff_t		end_fsb = XFS_B_TO_FSB(mp, offset + count);
 	xfs_fileoff_t		cow_fsb = NULLFILEOFF;
 	struct xfs_bmbt_irec	imap;
-	int			whichfork = XFS_DATA_FORK;
 	struct xfs_iext_cursor	icur;
-	bool			imap_valid;
+	int			retries = 0;
 	int			error = 0;
 
-	/*
-	 * We have to make sure the cached mapping is within EOF to protect
-	 * against eofblocks trimming on file release leaving us with a stale
-	 * mapping. Otherwise, a page for a subsequent file extending buffered
-	 * write could get picked up by this writeback cycle and written to the
-	 * wrong blocks.
-	 *
-	 * Note that what we really want here is a generic mapping invalidation
-	 * mechanism to protect us from arbitrary extent modifying contexts, not
-	 * just eofblocks.
-	 */
-	xfs_trim_extent_eof(&wpc->imap, ip);
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return -EIO;
 
 	/*
 	 * COW fork blocks can overlap data fork blocks even if the blocks
@@ -346,31 +519,19 @@ xfs_map_blocks(
 	 * against concurrent updates and provides a memory barrier on the way
 	 * out that ensures that we always see the current value.
 	 */
-	imap_valid = offset_fsb >= wpc->imap.br_startoff &&
-		     offset_fsb < wpc->imap.br_startoff + wpc->imap.br_blockcount;
-	if (imap_valid &&
-	    (!xfs_inode_has_cow_data(ip) ||
-	     wpc->io_type == XFS_IO_COW ||
-	     wpc->cow_seq == READ_ONCE(ip->i_cowfp->if_seq)))
+	if (xfs_imap_valid(wpc, ip, offset_fsb))
 		return 0;
 
-	if (XFS_FORCED_SHUTDOWN(mp))
-		return -EIO;
-
 	/*
 	 * If we don't have a valid map, now it's time to get a new one for this
 	 * offset.  This will convert delayed allocations (including COW ones)
 	 * into real extents.  If we return without a valid map, it means we
 	 * landed in a hole and we skip the block.
 	 */
+retry:
 	xfs_ilock(ip, XFS_ILOCK_SHARED);
 	ASSERT(ip->i_d.di_format != XFS_DINODE_FMT_BTREE ||
 	       (ip->i_df.if_flags & XFS_IFEXTENTS));
-	ASSERT(offset <= mp->m_super->s_maxbytes);
-
-	if (offset > mp->m_super->s_maxbytes - count)
-		count = mp->m_super->s_maxbytes - offset;
-	end_fsb = XFS_B_TO_FSB(mp, (xfs_ufsize_t)offset + count);
 
 	/*
 	 * Check if this is offset is covered by a COW extents, and if yes use
@@ -382,30 +543,16 @@ xfs_map_blocks(
 	if (cow_fsb != NULLFILEOFF && cow_fsb <= offset_fsb) {
 		wpc->cow_seq = READ_ONCE(ip->i_cowfp->if_seq);
 		xfs_iunlock(ip, XFS_ILOCK_SHARED);
-		/*
-		 * Truncate can race with writeback since writeback doesn't
-		 * take the iolock and truncate decreases the file size before
-		 * it starts truncating the pages between new_size and old_size.
-		 * Therefore, we can end up in the situation where writeback
-		 * gets a CoW fork mapping but the truncate makes the mapping
-		 * invalid and we end up in here trying to get a new mapping.
-		 * bail out here so that we simply never get a valid mapping
-		 * and so we drop the write altogether.  The page truncation
-		 * will kill the contents anyway.
-		 */
-		if (offset > i_size_read(inode)) {
-			wpc->io_type = XFS_IO_HOLE;
-			return 0;
-		}
-		whichfork = XFS_COW_FORK;
-		wpc->io_type = XFS_IO_COW;
+
+		wpc->fork = XFS_COW_FORK;
 		goto allocate_blocks;
 	}
 
 	/*
-	 * Map valid and no COW extent in the way?  We're done.
+	 * No COW extent overlap. Revalidate now that we may have updated
+	 * ->cow_seq. If the data mapping is still valid, we're done.
 	 */
-	if (imap_valid) {
+	if (xfs_imap_valid(wpc, ip, offset_fsb)) {
 		xfs_iunlock(ip, XFS_ILOCK_SHARED);
 		return 0;
 	}
@@ -417,51 +564,65 @@ xfs_map_blocks(
 	 */
 	if (!xfs_iext_lookup_extent(ip, &ip->i_df, offset_fsb, &icur, &imap))
 		imap.br_startoff = end_fsb;	/* fake a hole past EOF */
+	wpc->data_seq = READ_ONCE(ip->i_df.if_seq);
 	xfs_iunlock(ip, XFS_ILOCK_SHARED);
 
+	wpc->fork = XFS_DATA_FORK;
+
+	/* landed in a hole or beyond EOF? */
 	if (imap.br_startoff > offset_fsb) {
-		/* landed in a hole or beyond EOF */
 		imap.br_blockcount = imap.br_startoff - offset_fsb;
 		imap.br_startoff = offset_fsb;
 		imap.br_startblock = HOLESTARTBLOCK;
-		wpc->io_type = XFS_IO_HOLE;
-	} else {
-		/*
-		 * Truncate to the next COW extent if there is one.  This is the
-		 * only opportunity to do this because we can skip COW fork
-		 * lookups for the subsequent blocks in the mapping; however,
-		 * the requirement to treat the COW range separately remains.
-		 */
-		if (cow_fsb != NULLFILEOFF &&
-		    cow_fsb < imap.br_startoff + imap.br_blockcount)
-			imap.br_blockcount = cow_fsb - imap.br_startoff;
-
-		if (isnullstartblock(imap.br_startblock)) {
-			/* got a delalloc extent */
-			wpc->io_type = XFS_IO_DELALLOC;
-			goto allocate_blocks;
-		}
-
-		if (imap.br_state == XFS_EXT_UNWRITTEN)
-			wpc->io_type = XFS_IO_UNWRITTEN;
-		else
-			wpc->io_type = XFS_IO_OVERWRITE;
+		imap.br_state = XFS_EXT_NORM;
 	}
 
+	/*
+	 * Truncate to the next COW extent if there is one.  This is the only
+	 * opportunity to do this because we can skip COW fork lookups for the
+	 * subsequent blocks in the mapping; however, the requirement to treat
+	 * the COW range separately remains.
+	 */
+	if (cow_fsb != NULLFILEOFF &&
+	    cow_fsb < imap.br_startoff + imap.br_blockcount)
+		imap.br_blockcount = cow_fsb - imap.br_startoff;
+
+	/* got a delalloc extent? */
+	if (imap.br_startblock != HOLESTARTBLOCK &&
+	    isnullstartblock(imap.br_startblock))
+		goto allocate_blocks;
+
 	wpc->imap = imap;
-	xfs_trim_extent_eof(&wpc->imap, ip);
-	trace_xfs_map_blocks_found(ip, offset, count, wpc->io_type, &imap);
+	trace_xfs_map_blocks_found(ip, offset, count, wpc->fork, &imap);
 	return 0;
 allocate_blocks:
-	error = xfs_iomap_write_allocate(ip, whichfork, offset, &imap,
-			&wpc->cow_seq);
-	if (error)
+	error = xfs_convert_blocks(wpc, ip, offset_fsb);
+	if (error) {
+		/*
+		 * If we failed to find the extent in the COW fork we might have
+		 * raced with a COW to data fork conversion or truncate.
+		 * Restart the lookup to catch the extent in the data fork for
+		 * the former case, but prevent additional retries to avoid
+		 * looping forever for the latter case.
+		 */
+		if (error == -EAGAIN && wpc->fork == XFS_COW_FORK && !retries++)
+			goto retry;
+		ASSERT(error != -EAGAIN);
 		return error;
-	ASSERT(whichfork == XFS_COW_FORK || cow_fsb == NULLFILEOFF ||
-	       imap.br_startoff + imap.br_blockcount <= cow_fsb);
-	wpc->imap = imap;
-	xfs_trim_extent_eof(&wpc->imap, ip);
-	trace_xfs_map_blocks_alloc(ip, offset, count, wpc->io_type, &imap);
+	}
+
+	/*
+	 * Due to merging the return real extent might be larger than the
+	 * original delalloc one.  Trim the return extent to the next COW
+	 * boundary again to force a re-lookup.
+	 */
+	if (wpc->fork != XFS_COW_FORK && cow_fsb != NULLFILEOFF &&
+	    cow_fsb < wpc->imap.br_startoff + wpc->imap.br_blockcount)
+		wpc->imap.br_blockcount = cow_fsb - wpc->imap.br_startoff;
+
+	ASSERT(wpc->imap.br_startoff <= offset_fsb);
+	ASSERT(wpc->imap.br_startoff + wpc->imap.br_blockcount > offset_fsb);
+	trace_xfs_map_blocks_alloc(ip, offset, count, wpc->fork, &imap);
 	return 0;
 }
 
@@ -473,7 +634,7 @@ allocate_blocks:
  * reference to the ioend to ensure that the ioend completion is only done once
  * all bios have been submitted and the ioend is really done.
  *
- * If @fail is non-zero, it means that we have a situation where some part of
+ * If @status is non-zero, it means that we have a situation where some part of
  * the submission process has failed after we have marked paged for writeback
  * and unlocked them. In this situation, we need to fail the bio and ioend
  * rather than submit it to IO. This typically only happens on a filesystem
@@ -485,33 +646,33 @@ xfs_submit_ioend(
 	struct xfs_ioend	*ioend,
 	int			status)
 {
-	/* Convert CoW extents to regular */
-	if (!status && ioend->io_type == XFS_IO_COW) {
-		/*
-		 * Yuk. This can do memory allocation, but is not a
-		 * transactional operation so everything is done in GFP_KERNEL
-		 * context. That can deadlock, because we hold pages in
-		 * writeback state and GFP_KERNEL allocations can block on them.
-		 * Hence we must operate in nofs conditions here.
-		 */
-		unsigned nofs_flag;
+	unsigned int		nofs_flag;
 
-		nofs_flag = memalloc_nofs_save();
+	/*
+	 * We can allocate memory here while doing writeback on behalf of
+	 * memory reclaim.  To avoid memory allocation deadlocks set the
+	 * task-wide nofs context for the following operations.
+	 */
+	nofs_flag = memalloc_nofs_save();
+
+	/* Convert CoW extents to regular */
+	if (!status && ioend->io_fork == XFS_COW_FORK) {
 		status = xfs_reflink_convert_cow(XFS_I(ioend->io_inode),
 				ioend->io_offset, ioend->io_size);
-		memalloc_nofs_restore(nofs_flag);
 	}
 
 	/* Reserve log space if we might write beyond the on-disk inode size. */
 	if (!status &&
-	    ioend->io_type != XFS_IO_UNWRITTEN &&
+	    (ioend->io_fork == XFS_COW_FORK ||
+	     ioend->io_state != XFS_EXT_UNWRITTEN) &&
 	    xfs_ioend_is_append(ioend) &&
 	    !ioend->io_append_trans)
 		status = xfs_setfilesize_trans_alloc(ioend);
 
+	memalloc_nofs_restore(nofs_flag);
+
 	ioend->io_bio->bi_private = ioend;
 	ioend->io_bio->bi_end_io = xfs_end_bio;
-	ioend->io_bio->bi_opf = REQ_OP_WRITE | wbc_to_write_flags(wbc);
 
 	/*
 	 * If we are failing the IO now, just mark the ioend with an
@@ -525,7 +686,6 @@ xfs_submit_ioend(
 		return status;
 	}
 
-	ioend->io_bio->bi_write_hint = ioend->io_inode->i_write_hint;
 	submit_bio(ioend->io_bio);
 	return 0;
 }
@@ -533,10 +693,12 @@ xfs_submit_ioend(
 static struct xfs_ioend *
 xfs_alloc_ioend(
 	struct inode		*inode,
-	unsigned int		type,
+	int			fork,
+	xfs_exntst_t		state,
 	xfs_off_t		offset,
 	struct block_device	*bdev,
-	sector_t		sector)
+	sector_t		sector,
+	struct writeback_control *wbc)
 {
 	struct xfs_ioend	*ioend;
 	struct bio		*bio;
@@ -544,14 +706,17 @@ xfs_alloc_ioend(
 	bio = bio_alloc_bioset(GFP_NOFS, BIO_MAX_PAGES, &xfs_ioend_bioset);
 	bio_set_dev(bio, bdev);
 	bio->bi_iter.bi_sector = sector;
+	bio->bi_opf = REQ_OP_WRITE | wbc_to_write_flags(wbc);
+	bio->bi_write_hint = inode->i_write_hint;
+	wbc_init_bio(wbc, bio);
 
 	ioend = container_of(bio, struct xfs_ioend, io_inline_bio);
 	INIT_LIST_HEAD(&ioend->io_list);
-	ioend->io_type = type;
+	ioend->io_fork = fork;
+	ioend->io_state = state;
 	ioend->io_inode = inode;
 	ioend->io_size = 0;
 	ioend->io_offset = offset;
-	INIT_WORK(&ioend->io_work, xfs_end_io);
 	ioend->io_append_trans = NULL;
 	ioend->io_bio = bio;
 	return ioend;
@@ -564,24 +729,22 @@ xfs_alloc_ioend(
  * so that the bi_private linkage is set up in the right direction for the
  * traversal in xfs_destroy_ioend().
  */
-static void
+static struct bio *
 xfs_chain_bio(
-	struct xfs_ioend	*ioend,
-	struct writeback_control *wbc,
-	struct block_device	*bdev,
-	sector_t		sector)
+	struct bio		*prev)
 {
 	struct bio *new;
 
 	new = bio_alloc(GFP_NOFS, BIO_MAX_PAGES);
-	bio_set_dev(new, bdev);
-	new->bi_iter.bi_sector = sector;
-	bio_chain(ioend->io_bio, new);
-	bio_get(ioend->io_bio);		/* for xfs_destroy_ioend */
-	ioend->io_bio->bi_opf = REQ_OP_WRITE | wbc_to_write_flags(wbc);
-	ioend->io_bio->bi_write_hint = ioend->io_inode->i_write_hint;
-	submit_bio(ioend->io_bio);
-	ioend->io_bio = new;
+	bio_copy_dev(new, prev);/* also copies over blkcg information */
+	new->bi_iter.bi_sector = bio_end_sector(prev);
+	new->bi_opf = prev->bi_opf;
+	new->bi_write_hint = prev->bi_write_hint;
+
+	bio_chain(prev, new);
+	bio_get(prev);		/* for xfs_destroy_ioend */
+	submit_bio(prev);
+	return new;
 }
 
 /*
@@ -603,29 +766,37 @@ xfs_add_to_ioend(
 	struct block_device	*bdev = xfs_find_bdev_for_inode(inode);
 	unsigned		len = i_blocksize(inode);
 	unsigned		poff = offset & (PAGE_SIZE - 1);
+	bool			merged, same_page = false;
 	sector_t		sector;
 
 	sector = xfs_fsb_to_db(ip, wpc->imap.br_startblock) +
 		((offset - XFS_FSB_TO_B(mp, wpc->imap.br_startoff)) >> 9);
 
-	if (!wpc->ioend || wpc->io_type != wpc->ioend->io_type ||
+	if (!wpc->ioend ||
+	    wpc->fork != wpc->ioend->io_fork ||
+	    wpc->imap.br_state != wpc->ioend->io_state ||
 	    sector != bio_end_sector(wpc->ioend->io_bio) ||
 	    offset != wpc->ioend->io_offset + wpc->ioend->io_size) {
 		if (wpc->ioend)
 			list_add(&wpc->ioend->io_list, iolist);
-		wpc->ioend = xfs_alloc_ioend(inode, wpc->io_type, offset,
-				bdev, sector);
+		wpc->ioend = xfs_alloc_ioend(inode, wpc->fork,
+				wpc->imap.br_state, offset, bdev, sector, wbc);
 	}
 
-	if (!__bio_try_merge_page(wpc->ioend->io_bio, page, len, poff)) {
-		if (iop)
-			atomic_inc(&iop->write_count);
-		if (bio_full(wpc->ioend->io_bio))
-			xfs_chain_bio(wpc->ioend, wbc, bdev, sector);
-		__bio_add_page(wpc->ioend->io_bio, page, len, poff);
+	merged = __bio_try_merge_page(wpc->ioend->io_bio, page, len, poff,
+			&same_page);
+
+	if (iop && !same_page)
+		atomic_inc(&iop->write_count);
+
+	if (!merged) {
+		if (bio_full(wpc->ioend->io_bio, len))
+			wpc->ioend->io_bio = xfs_chain_bio(wpc->ioend->io_bio);
+		bio_add_page(wpc->ioend->io_bio, page, len, poff);
 	}
 
 	wpc->ioend->io_size += len;
+	wbc_account_io(wbc, page, len);
 }
 
 STATIC void
@@ -723,7 +894,7 @@ xfs_writepage_map(
 		error = xfs_map_blocks(wpc, inode, file_offset);
 		if (error)
 			break;
-		if (wpc->io_type == XFS_IO_HOLE)
+		if (wpc->imap.br_startblock == HOLESTARTBLOCK)
 			continue;
 		xfs_add_to_ioend(inode, file_offset, page, iop, wpc, wbc,
 				 &submit_list);
@@ -918,9 +1089,7 @@ xfs_vm_writepage(
 	struct page		*page,
 	struct writeback_control *wbc)
 {
-	struct xfs_writepage_ctx wpc = {
-		.io_type = XFS_IO_HOLE,
-	};
+	struct xfs_writepage_ctx wpc = { };
 	int			ret;
 
 	ret = xfs_do_writepage(page, wbc, &wpc);
@@ -934,9 +1103,7 @@ xfs_vm_writepages(
 	struct address_space	*mapping,
 	struct writeback_control *wbc)
 {
-	struct xfs_writepage_ctx wpc = {
-		.io_type = XFS_IO_HOLE,
-	};
+	struct xfs_writepage_ctx wpc = { };
 	int			ret;
 
 	xfs_iflags_clear(XFS_I(mapping->host), XFS_ITRUNCATED);
@@ -983,7 +1150,7 @@ xfs_vm_bmap(
 	 * Since we don't pass back blockdev info, we can't return bmap
 	 * information for rt files either.
 	 */
-	if (xfs_is_reflink_inode(ip) || XFS_IS_REALTIME_INODE(ip))
+	if (xfs_is_cow_inode(ip) || XFS_IS_REALTIME_INODE(ip))
 		return 0;
 	return iomap_bmap(mapping, block, &xfs_iomap_ops);
 }
diff --git a/fs/xfs/xfs_aops.h b/fs/xfs/xfs_aops.h
index e5c23948a8ab..45a1ea240cbb 100644
--- a/fs/xfs/xfs_aops.h
+++ b/fs/xfs/xfs_aops.h
@@ -9,36 +9,15 @@
 extern struct bio_set xfs_ioend_bioset;
 
 /*
- * Types of I/O for bmap clustering and I/O completion tracking.
- *
- * This enum is used in string mapping in xfs_trace.h; please keep the
- * TRACE_DEFINE_ENUMs for it up to date.
- */
-enum {
-	XFS_IO_HOLE,		/* covers region without any block allocation */
-	XFS_IO_DELALLOC,	/* covers delalloc region */
-	XFS_IO_UNWRITTEN,	/* covers allocated but uninitialized data */
-	XFS_IO_OVERWRITE,	/* covers already allocated extent */
-	XFS_IO_COW,		/* covers copy-on-write extent */
-};
-
-#define XFS_IO_TYPES \
-	{ XFS_IO_HOLE,			"hole" },	\
-	{ XFS_IO_DELALLOC,		"delalloc" },	\
-	{ XFS_IO_UNWRITTEN,		"unwritten" },	\
-	{ XFS_IO_OVERWRITE,		"overwrite" },	\
-	{ XFS_IO_COW,			"CoW" }
-
-/*
  * Structure for buffered I/O completions.
  */
 struct xfs_ioend {
 	struct list_head	io_list;	/* next ioend in chain */
-	unsigned int		io_type;	/* delalloc / unwritten */
+	int			io_fork;	/* inode fork written back */
+	xfs_exntst_t		io_state;	/* extent state */
 	struct inode		*io_inode;	/* file being written to */
 	size_t			io_size;	/* size of the extent */
 	xfs_off_t		io_offset;	/* offset in the file */
-	struct work_struct	io_work;	/* xfsdatad work queue */
 	struct xfs_trans	*io_append_trans;/* xact. for size update */
 	struct bio		*io_bio;	/* bio being built */
 	struct bio		io_inline_bio;	/* MUST BE LAST! */
@@ -49,7 +28,6 @@ extern const struct address_space_operations xfs_dax_aops;
 
 int	xfs_setfilesize(struct xfs_inode *ip, xfs_off_t offset, size_t size);
 
-extern void xfs_count_page_state(struct page *, int *, int *);
 extern struct block_device *xfs_find_bdev_for_inode(struct inode *);
 extern struct dax_device *xfs_find_daxdev_for_inode(struct inode *);
 
diff --git a/fs/xfs/xfs_attr_inactive.c b/fs/xfs/xfs_attr_inactive.c
index 228821b2ebe0..dc93c51c17de 100644
--- a/fs/xfs/xfs_attr_inactive.c
+++ b/fs/xfs/xfs_attr_inactive.c
@@ -15,18 +15,13 @@
 #include "xfs_da_format.h"
 #include "xfs_da_btree.h"
 #include "xfs_inode.h"
-#include "xfs_alloc.h"
 #include "xfs_attr_remote.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_bmap.h"
 #include "xfs_attr.h"
 #include "xfs_attr_leaf.h"
-#include "xfs_error.h"
 #include "xfs_quota.h"
-#include "xfs_trace.h"
 #include "xfs_dir2.h"
-#include "xfs_defer.h"
 
 /*
  * Look at all the extents for this logical region,
@@ -121,7 +116,7 @@ xfs_attr3_leaf_inactive(
 	int			size;
 	int			tmp;
 	int			i;
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 
 	leaf = bp->b_addr;
 	xfs_attr3_leaf_hdr_from_disk(mp->m_attr_geo, &ichdr, leaf);
diff --git a/fs/xfs/xfs_attr_list.c b/fs/xfs/xfs_attr_list.c
index a58034049995..58fc820a70c6 100644
--- a/fs/xfs/xfs_attr_list.c
+++ b/fs/xfs/xfs_attr_list.c
@@ -6,25 +6,20 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_bit.h"
 #include "xfs_mount.h"
 #include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_bmap.h"
 #include "xfs_attr.h"
 #include "xfs_attr_sf.h"
-#include "xfs_attr_remote.h"
 #include "xfs_attr_leaf.h"
 #include "xfs_error.h"
 #include "xfs_trace.h"
-#include "xfs_buf_item.h"
-#include "xfs_cksum.h"
 #include "xfs_dir2.h"
 
 STATIC int
@@ -555,6 +550,7 @@ xfs_attr_put_listent(
 	attrlist_ent_t *aep;
 	int arraytop;
 
+	ASSERT(!context->seen_enough);
 	ASSERT(!(context->flags & ATTR_KERNOVAL));
 	ASSERT(context->count >= 0);
 	ASSERT(context->count < (ATTR_MAX_VALUELEN/8));
diff --git a/fs/xfs/xfs_bio_io.c b/fs/xfs/xfs_bio_io.c
new file mode 100644
index 000000000000..e2148f2d5d6b
--- /dev/null
+++ b/fs/xfs/xfs_bio_io.c
@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * Copyright (c) 2019 Christoph Hellwig.
+ */
+#include "xfs.h"
+
+static inline unsigned int bio_max_vecs(unsigned int count)
+{
+	return min_t(unsigned, howmany(count, PAGE_SIZE), BIO_MAX_PAGES);
+}
+
+int
+xfs_rw_bdev(
+	struct block_device	*bdev,
+	sector_t		sector,
+	unsigned int		count,
+	char			*data,
+	unsigned int		op)
+
+{
+	unsigned int		is_vmalloc = is_vmalloc_addr(data);
+	unsigned int		left = count;
+	int			error;
+	struct bio		*bio;
+
+	if (is_vmalloc && op == REQ_OP_WRITE)
+		flush_kernel_vmap_range(data, count);
+
+	bio = bio_alloc(GFP_KERNEL, bio_max_vecs(left));
+	bio_set_dev(bio, bdev);
+	bio->bi_iter.bi_sector = sector;
+	bio->bi_opf = op | REQ_META | REQ_SYNC;
+
+	do {
+		struct page	*page = kmem_to_page(data);
+		unsigned int	off = offset_in_page(data);
+		unsigned int	len = min_t(unsigned, left, PAGE_SIZE - off);
+
+		while (bio_add_page(bio, page, len, off) != len) {
+			struct bio	*prev = bio;
+
+			bio = bio_alloc(GFP_KERNEL, bio_max_vecs(left));
+			bio_copy_dev(bio, prev);
+			bio->bi_iter.bi_sector = bio_end_sector(prev);
+			bio->bi_opf = prev->bi_opf;
+			bio_chain(prev, bio);
+
+			submit_bio(prev);
+		}
+
+		data += len;
+		left -= len;
+	} while (left > 0);
+
+	error = submit_bio_wait(bio);
+	bio_put(bio);
+
+	if (is_vmalloc && op == REQ_OP_READ)
+		invalidate_kernel_vmap_range(data, count);
+	return error;
+}
diff --git a/fs/xfs/xfs_bmap_item.c b/fs/xfs/xfs_bmap_item.c
index ce45f066995e..9fa4a7ee8cfc 100644
--- a/fs/xfs/xfs_bmap_item.c
+++ b/fs/xfs/xfs_bmap_item.c
@@ -9,17 +9,16 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
+#include "xfs_shared.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
 #include "xfs_trans_priv.h"
-#include "xfs_buf_item.h"
 #include "xfs_bmap_item.h"
 #include "xfs_log.h"
 #include "xfs_bmap.h"
 #include "xfs_icache.h"
-#include "xfs_trace.h"
 #include "xfs_bmap_btree.h"
 #include "xfs_trans_space.h"
 
@@ -96,15 +95,6 @@ xfs_bui_item_format(
 }
 
 /*
- * Pinning has no meaning for an bui item, so just return.
- */
-STATIC void
-xfs_bui_item_pin(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
  * The unpin operation is the last place an BUI is manipulated in the log. It is
  * either inserted in the AIL or aborted in the event of a log I/O error. In
  * either case, the BUI transaction has been successfully committed to make it
@@ -123,71 +113,22 @@ xfs_bui_item_unpin(
 }
 
 /*
- * BUI items have no locking or pushing.  However, since BUIs are pulled from
- * the AIL when their corresponding BUDs are committed to disk, their situation
- * is very similar to being pinned.  Return XFS_ITEM_PINNED so that the caller
- * will eventually flush the log.  This should help in getting the BUI out of
- * the AIL.
- */
-STATIC uint
-xfs_bui_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
-{
-	return XFS_ITEM_PINNED;
-}
-
-/*
  * The BUI has been either committed or aborted if the transaction has been
  * cancelled. If the transaction was cancelled, an BUD isn't going to be
  * constructed and thus we free the BUI here directly.
  */
 STATIC void
-xfs_bui_item_unlock(
+xfs_bui_item_release(
 	struct xfs_log_item	*lip)
 {
-	if (test_bit(XFS_LI_ABORTED, &lip->li_flags))
-		xfs_bui_release(BUI_ITEM(lip));
-}
-
-/*
- * The BUI is logged only once and cannot be moved in the log, so simply return
- * the lsn at which it's been logged.
- */
-STATIC xfs_lsn_t
-xfs_bui_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	return lsn;
+	xfs_bui_release(BUI_ITEM(lip));
 }
 
-/*
- * The BUI dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
-STATIC void
-xfs_bui_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-}
-
-/*
- * This is the ops vector shared by all bui log items.
- */
 static const struct xfs_item_ops xfs_bui_item_ops = {
 	.iop_size	= xfs_bui_item_size,
 	.iop_format	= xfs_bui_item_format,
-	.iop_pin	= xfs_bui_item_pin,
 	.iop_unpin	= xfs_bui_item_unpin,
-	.iop_unlock	= xfs_bui_item_unlock,
-	.iop_committed	= xfs_bui_item_committed,
-	.iop_push	= xfs_bui_item_push,
-	.iop_committing = xfs_bui_item_committing,
+	.iop_release	= xfs_bui_item_release,
 };
 
 /*
@@ -249,126 +190,241 @@ xfs_bud_item_format(
 }
 
 /*
- * Pinning has no meaning for an bud item, so just return.
+ * The BUD is either committed or aborted if the transaction is cancelled. If
+ * the transaction is cancelled, drop our reference to the BUI and free the
+ * BUD.
  */
 STATIC void
-xfs_bud_item_pin(
+xfs_bud_item_release(
 	struct xfs_log_item	*lip)
 {
+	struct xfs_bud_log_item	*budp = BUD_ITEM(lip);
+
+	xfs_bui_release(budp->bud_buip);
+	kmem_zone_free(xfs_bud_zone, budp);
 }
 
-/*
- * Since pinning has no meaning for an bud item, unpinning does
- * not either.
- */
-STATIC void
-xfs_bud_item_unpin(
-	struct xfs_log_item	*lip,
-	int			remove)
+static const struct xfs_item_ops xfs_bud_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
+	.iop_size	= xfs_bud_item_size,
+	.iop_format	= xfs_bud_item_format,
+	.iop_release	= xfs_bud_item_release,
+};
+
+static struct xfs_bud_log_item *
+xfs_trans_get_bud(
+	struct xfs_trans		*tp,
+	struct xfs_bui_log_item		*buip)
 {
+	struct xfs_bud_log_item		*budp;
+
+	budp = kmem_zone_zalloc(xfs_bud_zone, KM_SLEEP);
+	xfs_log_item_init(tp->t_mountp, &budp->bud_item, XFS_LI_BUD,
+			  &xfs_bud_item_ops);
+	budp->bud_buip = buip;
+	budp->bud_format.bud_bui_id = buip->bui_format.bui_id;
+
+	xfs_trans_add_item(tp, &budp->bud_item);
+	return budp;
 }
 
 /*
- * There isn't much you can do to push on an bud item.  It is simply stuck
- * waiting for the log to be flushed to disk.
+ * Finish an bmap update and log it to the BUD. Note that the
+ * transaction is marked dirty regardless of whether the bmap update
+ * succeeds or fails to support the BUI/BUD lifecycle rules.
  */
-STATIC uint
-xfs_bud_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
+static int
+xfs_trans_log_finish_bmap_update(
+	struct xfs_trans		*tp,
+	struct xfs_bud_log_item		*budp,
+	enum xfs_bmap_intent_type	type,
+	struct xfs_inode		*ip,
+	int				whichfork,
+	xfs_fileoff_t			startoff,
+	xfs_fsblock_t			startblock,
+	xfs_filblks_t			*blockcount,
+	xfs_exntst_t			state)
 {
-	return XFS_ITEM_PINNED;
+	int				error;
+
+	error = xfs_bmap_finish_one(tp, ip, type, whichfork, startoff,
+			startblock, blockcount, state);
+
+	/*
+	 * Mark the transaction dirty, even on error. This ensures the
+	 * transaction is aborted, which:
+	 *
+	 * 1.) releases the BUI and frees the BUD
+	 * 2.) shuts down the filesystem
+	 */
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
+
+	return error;
 }
 
-/*
- * The BUD is either committed or aborted if the transaction is cancelled. If
- * the transaction is cancelled, drop our reference to the BUI and free the
- * BUD.
- */
-STATIC void
-xfs_bud_item_unlock(
-	struct xfs_log_item	*lip)
+/* Sort bmap intents by inode. */
+static int
+xfs_bmap_update_diff_items(
+	void				*priv,
+	struct list_head		*a,
+	struct list_head		*b)
 {
-	struct xfs_bud_log_item	*budp = BUD_ITEM(lip);
+	struct xfs_bmap_intent		*ba;
+	struct xfs_bmap_intent		*bb;
 
-	if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) {
-		xfs_bui_release(budp->bud_buip);
-		kmem_zone_free(xfs_bud_zone, budp);
-	}
+	ba = container_of(a, struct xfs_bmap_intent, bi_list);
+	bb = container_of(b, struct xfs_bmap_intent, bi_list);
+	return ba->bi_owner->i_ino - bb->bi_owner->i_ino;
 }
 
-/*
- * When the bud item is committed to disk, all we need to do is delete our
- * reference to our partner bui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_bud_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+/* Get an BUI. */
+STATIC void *
+xfs_bmap_update_create_intent(
+	struct xfs_trans		*tp,
+	unsigned int			count)
 {
-	struct xfs_bud_log_item	*budp = BUD_ITEM(lip);
+	struct xfs_bui_log_item		*buip;
+
+	ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS);
+	ASSERT(tp != NULL);
+
+	buip = xfs_bui_init(tp->t_mountp);
+	ASSERT(buip != NULL);
 
 	/*
-	 * Drop the BUI reference regardless of whether the BUD has been
-	 * aborted. Once the BUD transaction is constructed, it is the sole
-	 * responsibility of the BUD to release the BUI (even if the BUI is
-	 * aborted due to log I/O error).
+	 * Get a log_item_desc to point at the new item.
 	 */
-	xfs_bui_release(budp->bud_buip);
-	kmem_zone_free(xfs_bud_zone, budp);
+	xfs_trans_add_item(tp, &buip->bui_item);
+	return buip;
+}
 
-	return (xfs_lsn_t)-1;
+/* Set the map extent flags for this mapping. */
+static void
+xfs_trans_set_bmap_flags(
+	struct xfs_map_extent		*bmap,
+	enum xfs_bmap_intent_type	type,
+	int				whichfork,
+	xfs_exntst_t			state)
+{
+	bmap->me_flags = 0;
+	switch (type) {
+	case XFS_BMAP_MAP:
+	case XFS_BMAP_UNMAP:
+		bmap->me_flags = type;
+		break;
+	default:
+		ASSERT(0);
+	}
+	if (state == XFS_EXT_UNWRITTEN)
+		bmap->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN;
+	if (whichfork == XFS_ATTR_FORK)
+		bmap->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK;
 }
 
-/*
- * The BUD dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
+/* Log bmap updates in the intent item. */
 STATIC void
-xfs_bud_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+xfs_bmap_update_log_item(
+	struct xfs_trans		*tp,
+	void				*intent,
+	struct list_head		*item)
 {
+	struct xfs_bui_log_item		*buip = intent;
+	struct xfs_bmap_intent		*bmap;
+	uint				next_extent;
+	struct xfs_map_extent		*map;
+
+	bmap = container_of(item, struct xfs_bmap_intent, bi_list);
+
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
+
+	/*
+	 * atomic_inc_return gives us the value after the increment;
+	 * we want to use it as an array index so we need to subtract 1 from
+	 * it.
+	 */
+	next_extent = atomic_inc_return(&buip->bui_next_extent) - 1;
+	ASSERT(next_extent < buip->bui_format.bui_nextents);
+	map = &buip->bui_format.bui_extents[next_extent];
+	map->me_owner = bmap->bi_owner->i_ino;
+	map->me_startblock = bmap->bi_bmap.br_startblock;
+	map->me_startoff = bmap->bi_bmap.br_startoff;
+	map->me_len = bmap->bi_bmap.br_blockcount;
+	xfs_trans_set_bmap_flags(map, bmap->bi_type, bmap->bi_whichfork,
+			bmap->bi_bmap.br_state);
 }
 
-/*
- * This is the ops vector shared by all bud log items.
- */
-static const struct xfs_item_ops xfs_bud_item_ops = {
-	.iop_size	= xfs_bud_item_size,
-	.iop_format	= xfs_bud_item_format,
-	.iop_pin	= xfs_bud_item_pin,
-	.iop_unpin	= xfs_bud_item_unpin,
-	.iop_unlock	= xfs_bud_item_unlock,
-	.iop_committed	= xfs_bud_item_committed,
-	.iop_push	= xfs_bud_item_push,
-	.iop_committing = xfs_bud_item_committing,
-};
+/* Get an BUD so we can process all the deferred rmap updates. */
+STATIC void *
+xfs_bmap_update_create_done(
+	struct xfs_trans		*tp,
+	void				*intent,
+	unsigned int			count)
+{
+	return xfs_trans_get_bud(tp, intent);
+}
 
-/*
- * Allocate and initialize an bud item with the given number of extents.
- */
-struct xfs_bud_log_item *
-xfs_bud_init(
-	struct xfs_mount		*mp,
-	struct xfs_bui_log_item		*buip)
+/* Process a deferred rmap update. */
+STATIC int
+xfs_bmap_update_finish_item(
+	struct xfs_trans		*tp,
+	struct list_head		*item,
+	void				*done_item,
+	void				**state)
+{
+	struct xfs_bmap_intent		*bmap;
+	xfs_filblks_t			count;
+	int				error;
+
+	bmap = container_of(item, struct xfs_bmap_intent, bi_list);
+	count = bmap->bi_bmap.br_blockcount;
+	error = xfs_trans_log_finish_bmap_update(tp, done_item,
+			bmap->bi_type,
+			bmap->bi_owner, bmap->bi_whichfork,
+			bmap->bi_bmap.br_startoff,
+			bmap->bi_bmap.br_startblock,
+			&count,
+			bmap->bi_bmap.br_state);
+	if (!error && count > 0) {
+		ASSERT(bmap->bi_type == XFS_BMAP_UNMAP);
+		bmap->bi_bmap.br_blockcount = count;
+		return -EAGAIN;
+	}
+	kmem_free(bmap);
+	return error;
+}
 
+/* Abort all pending BUIs. */
+STATIC void
+xfs_bmap_update_abort_intent(
+	void				*intent)
 {
-	struct xfs_bud_log_item	*budp;
+	xfs_bui_release(intent);
+}
 
-	budp = kmem_zone_zalloc(xfs_bud_zone, KM_SLEEP);
-	xfs_log_item_init(mp, &budp->bud_item, XFS_LI_BUD, &xfs_bud_item_ops);
-	budp->bud_buip = buip;
-	budp->bud_format.bud_bui_id = buip->bui_format.bui_id;
+/* Cancel a deferred rmap update. */
+STATIC void
+xfs_bmap_update_cancel_item(
+	struct list_head		*item)
+{
+	struct xfs_bmap_intent		*bmap;
 
-	return budp;
+	bmap = container_of(item, struct xfs_bmap_intent, bi_list);
+	kmem_free(bmap);
 }
 
+const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
+	.max_items	= XFS_BUI_MAX_FAST_EXTENTS,
+	.diff_items	= xfs_bmap_update_diff_items,
+	.create_intent	= xfs_bmap_update_create_intent,
+	.abort_intent	= xfs_bmap_update_abort_intent,
+	.log_item	= xfs_bmap_update_log_item,
+	.create_done	= xfs_bmap_update_create_done,
+	.finish_item	= xfs_bmap_update_finish_item,
+	.cancel_item	= xfs_bmap_update_cancel_item,
+};
+
 /*
  * Process a bmap update intent item that was recovered from the log.
  * We need to update some inode's bmbt.
diff --git a/fs/xfs/xfs_bmap_item.h b/fs/xfs/xfs_bmap_item.h
index 89e043a88bb8..ad479cc73de8 100644
--- a/fs/xfs/xfs_bmap_item.h
+++ b/fs/xfs/xfs_bmap_item.h
@@ -75,8 +75,6 @@ extern struct kmem_zone	*xfs_bui_zone;
 extern struct kmem_zone	*xfs_bud_zone;
 
 struct xfs_bui_log_item *xfs_bui_init(struct xfs_mount *);
-struct xfs_bud_log_item *xfs_bud_init(struct xfs_mount *,
-		struct xfs_bui_log_item *);
 void xfs_bui_item_free(struct xfs_bui_log_item *);
 void xfs_bui_release(struct xfs_bui_log_item *);
 int xfs_bui_recover(struct xfs_trans *parent_tp, struct xfs_bui_log_item *buip);
diff --git a/fs/xfs/xfs_bmap_util.c b/fs/xfs/xfs_bmap_util.c
index 1ee8c5539fa4..98c6a7a71427 100644
--- a/fs/xfs/xfs_bmap_util.c
+++ b/fs/xfs/xfs_bmap_util.c
@@ -12,12 +12,10 @@
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
 #include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_trans.h"
-#include "xfs_extfree_item.h"
 #include "xfs_alloc.h"
 #include "xfs_bmap.h"
 #include "xfs_bmap_util.h"
@@ -28,11 +26,8 @@
 #include "xfs_trans_space.h"
 #include "xfs_trace.h"
 #include "xfs_icache.h"
-#include "xfs_log.h"
-#include "xfs_rmap_btree.h"
 #include "xfs_iomap.h"
 #include "xfs_reflink.h"
-#include "xfs_refcount.h"
 
 /* Kernel only BMAP related definitions and functions */
 
@@ -276,7 +271,7 @@ xfs_bmap_count_tree(
 	struct xfs_btree_block	*block, *nextblock;
 	int			numrecs;
 
-	error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp, XFS_BMAP_BTREE_REF,
+	error = xfs_btree_read_bufl(mp, tp, bno, &bp, XFS_BMAP_BTREE_REF,
 						&xfs_bmbt_buf_ops);
 	if (error)
 		return error;
@@ -287,7 +282,7 @@ xfs_bmap_count_tree(
 		/* Not at node above leaves, count this level of nodes */
 		nextbno = be64_to_cpu(block->bb_u.l.bb_rightsib);
 		while (nextbno != NULLFSBLOCK) {
-			error = xfs_btree_read_bufl(mp, tp, nextbno, 0, &nbp,
+			error = xfs_btree_read_bufl(mp, tp, nextbno, &nbp,
 						XFS_BMAP_BTREE_REF,
 						&xfs_bmbt_buf_ops);
 			if (error)
@@ -321,7 +316,7 @@ xfs_bmap_count_tree(
 			if (nextbno == NULLFSBLOCK)
 				break;
 			bno = nextbno;
-			error = xfs_btree_read_bufl(mp, tp, bno, 0, &bp,
+			error = xfs_btree_read_bufl(mp, tp, bno, &bp,
 						XFS_BMAP_BTREE_REF,
 						&xfs_bmbt_buf_ops);
 			if (error)
@@ -1162,16 +1157,13 @@ xfs_zero_file_space(
 	 * by virtue of the hole punch.
 	 */
 	error = xfs_free_file_space(ip, offset, len);
-	if (error)
-		goto out;
+	if (error || xfs_is_always_cow_inode(ip))
+		return error;
 
-	error = xfs_alloc_file_space(ip, round_down(offset, blksize),
+	return xfs_alloc_file_space(ip, round_down(offset, blksize),
 				     round_up(offset + len, blksize) -
 				     round_down(offset, blksize),
 				     XFS_BMAPI_PREALLOC);
-out:
-	return error;
-
 }
 
 static int
@@ -1196,6 +1188,8 @@ xfs_prepare_shift(
 	 * about to shift down every extent from offset to EOF.
 	 */
 	error = xfs_flush_unmap_range(ip, offset, XFS_ISIZE(ip));
+	if (error)
+		return error;
 
 	/*
 	 * Clean out anything hanging around in the cow fork now that
diff --git a/fs/xfs/xfs_buf.c b/fs/xfs/xfs_buf.c
index 4f5f2ff3f70f..ca0849043f54 100644
--- a/fs/xfs/xfs_buf.c
+++ b/fs/xfs/xfs_buf.c
@@ -4,24 +4,9 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
-#include <linux/stddef.h>
-#include <linux/errno.h>
-#include <linux/gfp.h>
-#include <linux/pagemap.h>
-#include <linux/init.h>
-#include <linux/vmalloc.h>
-#include <linux/bio.h>
-#include <linux/sysctl.h>
-#include <linux/proc_fs.h>
-#include <linux/workqueue.h>
-#include <linux/percpu.h>
-#include <linux/blkdev.h>
-#include <linux/hash.h>
-#include <linux/kthread.h>
-#include <linux/migrate.h>
 #include <linux/backing-dev.h>
-#include <linux/freezer.h>
 
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
@@ -213,7 +198,7 @@ xfs_buf_free_maps(
 	}
 }
 
-struct xfs_buf *
+static struct xfs_buf *
 _xfs_buf_alloc(
 	struct xfs_buftarg	*target,
 	struct xfs_buf_map	*map,
@@ -243,6 +228,7 @@ _xfs_buf_alloc(
 	sema_init(&bp->b_sema, 0); /* held, no waiters */
 	spin_lock_init(&bp->b_lock);
 	bp->b_target = target;
+	bp->b_mount = target->bt_mount;
 	bp->b_flags = flags;
 
 	/*
@@ -263,12 +249,11 @@ _xfs_buf_alloc(
 		bp->b_maps[i].bm_len = map[i].bm_len;
 		bp->b_length += map[i].bm_len;
 	}
-	bp->b_io_length = bp->b_length;
 
 	atomic_set(&bp->b_pin_count, 0);
 	init_waitqueue_head(&bp->b_waiters);
 
-	XFS_STATS_INC(target->bt_mount, xb_create);
+	XFS_STATS_INC(bp->b_mount, xb_create);
 	trace_xfs_buf_init(bp, _RET_IP_);
 
 	return bp;
@@ -425,12 +410,12 @@ retry:
 					current->comm, current->pid,
 					__func__, gfp_mask);
 
-			XFS_STATS_INC(bp->b_target->bt_mount, xb_page_retries);
+			XFS_STATS_INC(bp->b_mount, xb_page_retries);
 			congestion_wait(BLK_RW_ASYNC, HZ/50);
 			goto retry;
 		}
 
-		XFS_STATS_INC(bp->b_target->bt_mount, xb_page_found);
+		XFS_STATS_INC(bp->b_mount, xb_page_found);
 
 		nbytes = min_t(size_t, size, PAGE_SIZE - offset);
 		size -= nbytes;
@@ -776,29 +761,24 @@ _xfs_buf_read(
 }
 
 /*
- * Set buffer ops on an unchecked buffer and validate it, if possible.
- *
- * If the caller passed in an ops structure and the buffer doesn't have ops
- * assigned, set the ops and use them to verify the contents.  If the contents
- * cannot be verified, we'll clear XBF_DONE.  We assume the buffer has no
- * recorded errors and is already in XBF_DONE state.
+ * Reverify a buffer found in cache without an attached ->b_ops.
  *
- * Under normal operations, every in-core buffer must have buffer ops assigned
- * to them when the buffer is read in from disk so that we can validate the
- * metadata.
+ * If the caller passed an ops structure and the buffer doesn't have ops
+ * assigned, set the ops and use it to verify the contents. If verification
+ * fails, clear XBF_DONE. We assume the buffer has no recorded errors and is
+ * already in XBF_DONE state on entry.
  *
- * However, there are two scenarios where one can encounter in-core buffers
- * that don't have buffer ops.  The first is during log recovery of buffers on
- * a V4 filesystem, though these buffers are purged at the end of recovery.
- *
- * The other is online repair, which tries to match arbitrary metadata blocks
- * with btree types in order to find the root.  If online repair doesn't match
- * the buffer with /any/ btree type, the buffer remains in memory in DONE state
- * with no ops, and a subsequent read_buf call from elsewhere will not set the
- * ops.  This function helps us fix this situation.
+ * Under normal operations, every in-core buffer is verified on read I/O
+ * completion. There are two scenarios that can lead to in-core buffers without
+ * an assigned ->b_ops. The first is during log recovery of buffers on a V4
+ * filesystem, though these buffers are purged at the end of recovery. The
+ * other is online repair, which intentionally reads with a NULL buffer ops to
+ * run several verifiers across an in-core buffer in order to establish buffer
+ * type.  If repair can't establish that, the buffer will be left in memory
+ * with NULL buffer ops.
  */
 int
-xfs_buf_ensure_ops(
+xfs_buf_reverify(
 	struct xfs_buf		*bp,
 	const struct xfs_buf_ops *ops)
 {
@@ -840,7 +820,7 @@ xfs_buf_read_map(
 		return bp;
 	}
 
-	xfs_buf_ensure_ops(bp, ops);
+	xfs_buf_reverify(bp, ops);
 
 	if (flags & XBF_ASYNC) {
 		/*
@@ -914,83 +894,6 @@ xfs_buf_read_uncached(
 	return 0;
 }
 
-/*
- * Return a buffer allocated as an empty buffer and associated to external
- * memory via xfs_buf_associate_memory() back to it's empty state.
- */
-void
-xfs_buf_set_empty(
-	struct xfs_buf		*bp,
-	size_t			numblks)
-{
-	if (bp->b_pages)
-		_xfs_buf_free_pages(bp);
-
-	bp->b_pages = NULL;
-	bp->b_page_count = 0;
-	bp->b_addr = NULL;
-	bp->b_length = numblks;
-	bp->b_io_length = numblks;
-
-	ASSERT(bp->b_map_count == 1);
-	bp->b_bn = XFS_BUF_DADDR_NULL;
-	bp->b_maps[0].bm_bn = XFS_BUF_DADDR_NULL;
-	bp->b_maps[0].bm_len = bp->b_length;
-}
-
-static inline struct page *
-mem_to_page(
-	void			*addr)
-{
-	if ((!is_vmalloc_addr(addr))) {
-		return virt_to_page(addr);
-	} else {
-		return vmalloc_to_page(addr);
-	}
-}
-
-int
-xfs_buf_associate_memory(
-	xfs_buf_t		*bp,
-	void			*mem,
-	size_t			len)
-{
-	int			rval;
-	int			i = 0;
-	unsigned long		pageaddr;
-	unsigned long		offset;
-	size_t			buflen;
-	int			page_count;
-
-	pageaddr = (unsigned long)mem & PAGE_MASK;
-	offset = (unsigned long)mem - pageaddr;
-	buflen = PAGE_ALIGN(len + offset);
-	page_count = buflen >> PAGE_SHIFT;
-
-	/* Free any previous set of page pointers */
-	if (bp->b_pages)
-		_xfs_buf_free_pages(bp);
-
-	bp->b_pages = NULL;
-	bp->b_addr = mem;
-
-	rval = _xfs_buf_get_pages(bp, page_count);
-	if (rval)
-		return rval;
-
-	bp->b_offset = offset;
-
-	for (i = 0; i < bp->b_page_count; i++) {
-		bp->b_pages[i] = mem_to_page((void *)pageaddr);
-		pageaddr += PAGE_SIZE;
-	}
-
-	bp->b_io_length = BTOBB(len);
-	bp->b_length = BTOBB(buflen);
-
-	return 0;
-}
-
 xfs_buf_t *
 xfs_buf_get_uncached(
 	struct xfs_buftarg	*target,
@@ -1185,7 +1088,7 @@ xfs_buf_lock(
 	trace_xfs_buf_lock(bp, _RET_IP_);
 
 	if (atomic_read(&bp->b_pin_count) && (bp->b_flags & XBF_STALE))
-		xfs_log_force(bp->b_target->bt_mount, 0);
+		xfs_log_force(bp->b_mount, 0);
 	down(&bp->b_sema);
 
 	trace_xfs_buf_lock_done(bp, _RET_IP_);
@@ -1274,7 +1177,7 @@ xfs_buf_ioend_async(
 	struct xfs_buf	*bp)
 {
 	INIT_WORK(&bp->b_ioend_work, xfs_buf_ioend_work);
-	queue_work(bp->b_ioend_wq, &bp->b_ioend_work);
+	queue_work(bp->b_mount->m_buf_workqueue, &bp->b_ioend_work);
 }
 
 void
@@ -1293,7 +1196,7 @@ xfs_buf_ioerror_alert(
 	struct xfs_buf		*bp,
 	const char		*func)
 {
-	xfs_alert(bp->b_target->bt_mount,
+	xfs_alert(bp->b_mount,
 "metadata I/O error in \"%s\" at daddr 0x%llx len %d error %d",
 			func, (uint64_t)XFS_BUF_ADDR(bp), bp->b_length,
 			-bp->b_error);
@@ -1312,10 +1215,8 @@ xfs_bwrite(
 			 XBF_WRITE_FAIL | XBF_DONE);
 
 	error = xfs_buf_submit(bp);
-	if (error) {
-		xfs_force_shutdown(bp->b_target->bt_mount,
-				   SHUTDOWN_META_IO_ERROR);
-	}
+	if (error)
+		xfs_force_shutdown(bp->b_mount, SHUTDOWN_META_IO_ERROR);
 	return error;
 }
 
@@ -1441,21 +1342,8 @@ _xfs_buf_ioapply(
 	 */
 	bp->b_error = 0;
 
-	/*
-	 * Initialize the I/O completion workqueue if we haven't yet or the
-	 * submitter has not opted to specify a custom one.
-	 */
-	if (!bp->b_ioend_wq)
-		bp->b_ioend_wq = bp->b_target->bt_mount->m_buf_workqueue;
-
 	if (bp->b_flags & XBF_WRITE) {
 		op = REQ_OP_WRITE;
-		if (bp->b_flags & XBF_SYNCIO)
-			op_flags = REQ_SYNC;
-		if (bp->b_flags & XBF_FUA)
-			op_flags |= REQ_FUA;
-		if (bp->b_flags & XBF_FLUSH)
-			op_flags |= REQ_PREFLUSH;
 
 		/*
 		 * Run the write verifier callback function if it exists. If
@@ -1465,12 +1353,12 @@ _xfs_buf_ioapply(
 		if (bp->b_ops) {
 			bp->b_ops->verify_write(bp);
 			if (bp->b_error) {
-				xfs_force_shutdown(bp->b_target->bt_mount,
+				xfs_force_shutdown(bp->b_mount,
 						   SHUTDOWN_CORRUPT_INCORE);
 				return;
 			}
 		} else if (bp->b_bn != XFS_BUF_DADDR_NULL) {
-			struct xfs_mount *mp = bp->b_target->bt_mount;
+			struct xfs_mount *mp = bp->b_mount;
 
 			/*
 			 * non-crc filesystems don't attach verifiers during
@@ -1502,7 +1390,7 @@ _xfs_buf_ioapply(
 	 * subsequent call.
 	 */
 	offset = bp->b_offset;
-	size = BBTOB(bp->b_io_length);
+	size = BBTOB(bp->b_length);
 	blk_start_plug(&plug);
 	for (i = 0; i < bp->b_map_count; i++) {
 		xfs_buf_ioapply_map(bp, i, &offset, &size, op, op_flags);
@@ -1548,7 +1436,7 @@ __xfs_buf_submit(
 	ASSERT(!(bp->b_flags & _XBF_DELWRI_Q));
 
 	/* on shutdown we stale and complete the buffer immediately */
-	if (XFS_FORCED_SHUTDOWN(bp->b_target->bt_mount)) {
+	if (XFS_FORCED_SHUTDOWN(bp->b_mount)) {
 		xfs_buf_ioerror(bp, -EIO);
 		bp->b_flags &= ~XBF_DONE;
 		xfs_buf_stale(bp);
@@ -1618,16 +1506,11 @@ xfs_buf_offset(
 	return page_address(page) + (offset & (PAGE_SIZE-1));
 }
 
-/*
- *	Move data into or out of a buffer.
- */
 void
-xfs_buf_iomove(
-	xfs_buf_t		*bp,	/* buffer to process		*/
-	size_t			boff,	/* starting buffer offset	*/
-	size_t			bsize,	/* length to copy		*/
-	void			*data,	/* data address			*/
-	xfs_buf_rw_t		mode)	/* read/write/zero flag		*/
+xfs_buf_zero(
+	struct xfs_buf		*bp,
+	size_t			boff,
+	size_t			bsize)
 {
 	size_t			bend;
 
@@ -1640,23 +1523,13 @@ xfs_buf_iomove(
 		page_offset = (boff + bp->b_offset) & ~PAGE_MASK;
 		page = bp->b_pages[page_index];
 		csize = min_t(size_t, PAGE_SIZE - page_offset,
-				      BBTOB(bp->b_io_length) - boff);
+				      BBTOB(bp->b_length) - boff);
 
 		ASSERT((csize + page_offset) <= PAGE_SIZE);
 
-		switch (mode) {
-		case XBRW_ZERO:
-			memset(page_address(page) + page_offset, 0, csize);
-			break;
-		case XBRW_READ:
-			memcpy(data, page_address(page) + page_offset, csize);
-			break;
-		case XBRW_WRITE:
-			memcpy(page_address(page) + page_offset, data, csize);
-		}
+		memset(page_address(page) + page_offset, 0, csize);
 
 		boff += csize;
-		data += csize;
 	}
 }
 
@@ -2203,9 +2076,45 @@ void xfs_buf_set_ref(struct xfs_buf *bp, int lru_ref)
 	 * This allows userspace to disrupt buffer caching for debug/testing
 	 * purposes.
 	 */
-	if (XFS_TEST_ERROR(false, bp->b_target->bt_mount,
-			   XFS_ERRTAG_BUF_LRU_REF))
+	if (XFS_TEST_ERROR(false, bp->b_mount, XFS_ERRTAG_BUF_LRU_REF))
 		lru_ref = 0;
 
 	atomic_set(&bp->b_lru_ref, lru_ref);
 }
+
+/*
+ * Verify an on-disk magic value against the magic value specified in the
+ * verifier structure. The verifier magic is in disk byte order so the caller is
+ * expected to pass the value directly from disk.
+ */
+bool
+xfs_verify_magic(
+	struct xfs_buf		*bp,
+	__be32			dmagic)
+{
+	struct xfs_mount	*mp = bp->b_mount;
+	int			idx;
+
+	idx = xfs_sb_version_hascrc(&mp->m_sb);
+	if (unlikely(WARN_ON(!bp->b_ops || !bp->b_ops->magic[idx])))
+		return false;
+	return dmagic == bp->b_ops->magic[idx];
+}
+/*
+ * Verify an on-disk magic value against the magic value specified in the
+ * verifier structure. The verifier magic is in disk byte order so the caller is
+ * expected to pass the value directly from disk.
+ */
+bool
+xfs_verify_magic16(
+	struct xfs_buf		*bp,
+	__be16			dmagic)
+{
+	struct xfs_mount	*mp = bp->b_mount;
+	int			idx;
+
+	idx = xfs_sb_version_hascrc(&mp->m_sb);
+	if (unlikely(WARN_ON(!bp->b_ops || !bp->b_ops->magic16[idx])))
+		return false;
+	return dmagic == bp->b_ops->magic16[idx];
+}
diff --git a/fs/xfs/xfs_buf.h b/fs/xfs/xfs_buf.h
index b9f5511ea998..c6e57a3f409e 100644
--- a/fs/xfs/xfs_buf.h
+++ b/fs/xfs/xfs_buf.h
@@ -21,12 +21,6 @@
 
 #define XFS_BUF_DADDR_NULL	((xfs_daddr_t) (-1LL))
 
-typedef enum {
-	XBRW_READ = 1,			/* transfer into target memory */
-	XBRW_WRITE = 2,			/* transfer from target memory */
-	XBRW_ZERO = 3,			/* Zero target memory */
-} xfs_buf_rw_t;
-
 #define XBF_READ	 (1 << 0) /* buffer intended for reading from device */
 #define XBF_WRITE	 (1 << 1) /* buffer intended for writing to device */
 #define XBF_READ_AHEAD	 (1 << 2) /* asynchronous read-ahead */
@@ -34,12 +28,7 @@ typedef enum {
 #define XBF_ASYNC	 (1 << 4) /* initiator will not wait for completion */
 #define XBF_DONE	 (1 << 5) /* all pages in the buffer uptodate */
 #define XBF_STALE	 (1 << 6) /* buffer has been staled, do not find it */
-#define XBF_WRITE_FAIL	 (1 << 24)/* async writes have failed on this buffer */
-
-/* I/O hints for the BIO layer */
-#define XBF_SYNCIO	 (1 << 10)/* treat this buffer as synchronous I/O */
-#define XBF_FUA		 (1 << 11)/* force cache write through mode */
-#define XBF_FLUSH	 (1 << 12)/* flush the disk cache before a write */
+#define XBF_WRITE_FAIL	 (1 << 7) /* async writes have failed on this buffer */
 
 /* flags used only as arguments to access routines */
 #define XBF_TRYLOCK	 (1 << 16)/* lock requested, but do not wait */
@@ -49,7 +38,6 @@ typedef enum {
 #define _XBF_PAGES	 (1 << 20)/* backed by refcounted pages */
 #define _XBF_KMEM	 (1 << 21)/* backed by heap memory */
 #define _XBF_DELWRI_Q	 (1 << 22)/* buffer on a delwri queue */
-#define _XBF_COMPOUND	 (1 << 23)/* compound buffer */
 
 typedef unsigned int xfs_buf_flags_t;
 
@@ -62,15 +50,11 @@ typedef unsigned int xfs_buf_flags_t;
 	{ XBF_DONE,		"DONE" }, \
 	{ XBF_STALE,		"STALE" }, \
 	{ XBF_WRITE_FAIL,	"WRITE_FAIL" }, \
-	{ XBF_SYNCIO,		"SYNCIO" }, \
-	{ XBF_FUA,		"FUA" }, \
-	{ XBF_FLUSH,		"FLUSH" }, \
 	{ XBF_TRYLOCK,		"TRYLOCK" },	/* should never be set */\
 	{ XBF_UNMAPPED,		"UNMAPPED" },	/* ditto */\
 	{ _XBF_PAGES,		"PAGES" }, \
 	{ _XBF_KMEM,		"KMEM" }, \
-	{ _XBF_DELWRI_Q,	"DELWRI_Q" }, \
-	{ _XBF_COMPOUND,	"COMPOUND" }
+	{ _XBF_DELWRI_Q,	"DELWRI_Q" }
 
 
 /*
@@ -125,6 +109,10 @@ struct xfs_buf_map {
 
 struct xfs_buf_ops {
 	char *name;
+	union {
+		__be32 magic[2];	/* v4 and v5 on disk magic values */
+		__be16 magic16[2];	/* v4 and v5 on disk magic values */
+	};
 	void (*verify_read)(struct xfs_buf *);
 	void (*verify_write)(struct xfs_buf *);
 	xfs_failaddr_t (*verify_struct)(struct xfs_buf *bp);
@@ -157,13 +145,13 @@ typedef struct xfs_buf {
 	wait_queue_head_t	b_waiters;	/* unpin waiters */
 	struct list_head	b_list;
 	struct xfs_perag	*b_pag;		/* contains rbtree root */
+	struct xfs_mount	*b_mount;
 	xfs_buftarg_t		*b_target;	/* buffer target (device) */
 	void			*b_addr;	/* virtual address of buffer */
 	struct work_struct	b_ioend_work;
-	struct workqueue_struct	*b_ioend_wq;	/* I/O completion wq */
 	xfs_buf_iodone_t	b_iodone;	/* I/O completion function */
 	struct completion	b_iowait;	/* queue for I/O waiters */
-	void			*b_log_item;
+	struct xfs_buf_log_item	*b_log_item;
 	struct list_head	b_li_list;	/* Log items list head */
 	struct xfs_trans	*b_transp;
 	struct page		**b_pages;	/* array of page pointers */
@@ -171,7 +159,6 @@ typedef struct xfs_buf {
 	struct xfs_buf_map	*b_maps;	/* compound buffer map */
 	struct xfs_buf_map	__b_map;	/* inline compound buffer map */
 	int			b_map_count;
-	int			b_io_length;	/* IO size in BBs */
 	atomic_t		b_pin_count;	/* pin count */
 	atomic_t		b_io_remaining;	/* #outstanding I/O requests */
 	unsigned int		b_page_count;	/* size of page array */
@@ -205,21 +192,6 @@ struct xfs_buf *xfs_buf_incore(struct xfs_buftarg *target,
 			   xfs_daddr_t blkno, size_t numblks,
 			   xfs_buf_flags_t flags);
 
-struct xfs_buf *_xfs_buf_alloc(struct xfs_buftarg *target,
-			       struct xfs_buf_map *map, int nmaps,
-			       xfs_buf_flags_t flags);
-
-static inline struct xfs_buf *
-xfs_buf_alloc(
-	struct xfs_buftarg	*target,
-	xfs_daddr_t		blkno,
-	size_t			numblks,
-	xfs_buf_flags_t		flags)
-{
-	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
-	return _xfs_buf_alloc(target, &map, 1, flags);
-}
-
 struct xfs_buf *xfs_buf_get_map(struct xfs_buftarg *target,
 			       struct xfs_buf_map *map, int nmaps,
 			       xfs_buf_flags_t flags);
@@ -235,11 +207,10 @@ static inline struct xfs_buf *
 xfs_buf_get(
 	struct xfs_buftarg	*target,
 	xfs_daddr_t		blkno,
-	size_t			numblks,
-	xfs_buf_flags_t		flags)
+	size_t			numblks)
 {
 	DEFINE_SINGLE_BUF_MAP(map, blkno, numblks);
-	return xfs_buf_get_map(target, &map, 1, flags);
+	return xfs_buf_get_map(target, &map, 1, 0);
 }
 
 static inline struct xfs_buf *
@@ -265,9 +236,6 @@ xfs_buf_readahead(
 	return xfs_buf_readahead_map(target, &map, 1, ops);
 }
 
-void xfs_buf_set_empty(struct xfs_buf *bp, size_t numblks);
-int xfs_buf_associate_memory(struct xfs_buf *bp, void *mem, size_t length);
-
 struct xfs_buf *xfs_buf_get_uncached(struct xfs_buftarg *target, size_t numblks,
 				int flags);
 int xfs_buf_read_uncached(struct xfs_buftarg *target, xfs_daddr_t daddr,
@@ -301,10 +269,7 @@ static inline int xfs_buf_submit(struct xfs_buf *bp)
 	return __xfs_buf_submit(bp, wait);
 }
 
-extern void xfs_buf_iomove(xfs_buf_t *, size_t, size_t, void *,
-				xfs_buf_rw_t);
-#define xfs_buf_zero(bp, off, len) \
-	    xfs_buf_iomove((bp), (off), (len), NULL, XBRW_ZERO)
+void xfs_buf_zero(struct xfs_buf *bp, size_t boff, size_t bsize);
 
 /* Buffer Utility Routines */
 extern void *xfs_buf_offset(struct xfs_buf *, size_t);
@@ -385,6 +350,8 @@ extern int xfs_setsize_buftarg(xfs_buftarg_t *, unsigned int);
 #define xfs_getsize_buftarg(buftarg)	block_size((buftarg)->bt_bdev)
 #define xfs_readonly_buftarg(buftarg)	bdev_read_only((buftarg)->bt_bdev)
 
-int xfs_buf_ensure_ops(struct xfs_buf *bp, const struct xfs_buf_ops *ops);
+int xfs_buf_reverify(struct xfs_buf *bp, const struct xfs_buf_ops *ops);
+bool xfs_verify_magic(struct xfs_buf *bp, __be32 dmagic);
+bool xfs_verify_magic16(struct xfs_buf *bp, __be16 dmagic);
 
 #endif	/* __XFS_BUF_H__ */
diff --git a/fs/xfs/xfs_buf_item.c b/fs/xfs/xfs_buf_item.c
index 010db5f8fb00..7dcaec54a20b 100644
--- a/fs/xfs/xfs_buf_item.c
+++ b/fs/xfs/xfs_buf_item.c
@@ -5,19 +5,17 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_trans_priv.h"
-#include "xfs_error.h"
 #include "xfs_trace.h"
 #include "xfs_log.h"
-#include "xfs_inode.h"
 
 
 kmem_zone_t	*xfs_buf_item_zone;
@@ -520,7 +518,7 @@ xfs_buf_item_push(
 	/* has a previous flush failed due to IO errors? */
 	if ((bp->b_flags & XBF_WRITE_FAIL) &&
 	    ___ratelimit(&xfs_buf_write_fail_rl_state, "XFS: Failing async write")) {
-		xfs_warn(bp->b_target->bt_mount,
+		xfs_warn(bp->b_mount,
 "Failing async write on buffer block 0x%llx. Retrying async write.",
 			 (long long)bp->b_bn);
 	}
@@ -594,7 +592,7 @@ xfs_buf_item_put(
  * free the item.
  */
 STATIC void
-xfs_buf_item_unlock(
+xfs_buf_item_release(
 	struct xfs_log_item	*lip)
 {
 	struct xfs_buf_log_item	*bip = BUF_ITEM(lip);
@@ -605,9 +603,11 @@ xfs_buf_item_unlock(
 #if defined(DEBUG) || defined(XFS_WARN)
 	bool			ordered = bip->bli_flags & XFS_BLI_ORDERED;
 	bool			dirty = bip->bli_flags & XFS_BLI_DIRTY;
+	bool			aborted = test_bit(XFS_LI_ABORTED,
+						   &lip->li_flags);
 #endif
 
-	trace_xfs_buf_item_unlock(bip);
+	trace_xfs_buf_item_release(bip);
 
 	/*
 	 * The bli dirty state should match whether the blf has logged segments
@@ -633,10 +633,18 @@ xfs_buf_item_unlock(
 	released = xfs_buf_item_put(bip);
 	if (hold || (stale && !released))
 		return;
-	ASSERT(!stale || test_bit(XFS_LI_ABORTED, &lip->li_flags));
+	ASSERT(!stale || aborted);
 	xfs_buf_relse(bp);
 }
 
+STATIC void
+xfs_buf_item_committing(
+	struct xfs_log_item	*lip,
+	xfs_lsn_t		commit_lsn)
+{
+	return xfs_buf_item_release(lip);
+}
+
 /*
  * This is called to find out where the oldest active copy of the
  * buf log item in the on disk log resides now that the last log
@@ -669,25 +677,15 @@ xfs_buf_item_committed(
 	return lsn;
 }
 
-STATIC void
-xfs_buf_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		commit_lsn)
-{
-}
-
-/*
- * This is the ops vector shared by all buf log items.
- */
 static const struct xfs_item_ops xfs_buf_item_ops = {
 	.iop_size	= xfs_buf_item_size,
 	.iop_format	= xfs_buf_item_format,
 	.iop_pin	= xfs_buf_item_pin,
 	.iop_unpin	= xfs_buf_item_unpin,
-	.iop_unlock	= xfs_buf_item_unlock,
+	.iop_release	= xfs_buf_item_release,
+	.iop_committing	= xfs_buf_item_committing,
 	.iop_committed	= xfs_buf_item_committed,
 	.iop_push	= xfs_buf_item_push,
-	.iop_committing = xfs_buf_item_committing
 };
 
 STATIC int
@@ -741,7 +739,7 @@ xfs_buf_item_init(
 	 * this buffer. If we do already have one, there is
 	 * nothing to do here so return.
 	 */
-	ASSERT(bp->b_target->bt_mount == mp);
+	ASSERT(bp->b_mount == mp);
 	if (bip) {
 		ASSERT(bip->bli_item.li_type == XFS_LI_BUF);
 		ASSERT(!bp->b_transp);
@@ -978,9 +976,9 @@ xfs_buf_item_relse(
  */
 void
 xfs_buf_attach_iodone(
-	xfs_buf_t	*bp,
-	void		(*cb)(xfs_buf_t *, xfs_log_item_t *),
-	xfs_log_item_t	*lip)
+	struct xfs_buf		*bp,
+	void			(*cb)(struct xfs_buf *, struct xfs_log_item *),
+	struct xfs_log_item	*lip)
 {
 	ASSERT(xfs_buf_islocked(bp));
 
diff --git a/fs/xfs/xfs_buf_item.h b/fs/xfs/xfs_buf_item.h
index 90f65f891fab..4a054b11011a 100644
--- a/fs/xfs/xfs_buf_item.h
+++ b/fs/xfs/xfs_buf_item.h
@@ -39,7 +39,7 @@ struct xfs_buf_log_item;
  * locked, and which 128 byte chunks of the buffer are dirty.
  */
 struct xfs_buf_log_item {
-	xfs_log_item_t		bli_item;	/* common item structure */
+	struct xfs_log_item	bli_item;	/* common item structure */
 	struct xfs_buf		*bli_buf;	/* real buffer pointer */
 	unsigned int		bli_flags;	/* misc flags */
 	unsigned int		bli_recur;	/* lock recursion count */
@@ -55,8 +55,8 @@ bool	xfs_buf_item_put(struct xfs_buf_log_item *);
 void	xfs_buf_item_log(struct xfs_buf_log_item *, uint, uint);
 bool	xfs_buf_item_dirty_format(struct xfs_buf_log_item *);
 void	xfs_buf_attach_iodone(struct xfs_buf *,
-			      void(*)(struct xfs_buf *, xfs_log_item_t *),
-			      xfs_log_item_t *);
+			      void(*)(struct xfs_buf *, struct xfs_log_item *),
+			      struct xfs_log_item *);
 void	xfs_buf_iodone_callbacks(struct xfs_buf *);
 void	xfs_buf_iodone(struct xfs_buf *, struct xfs_log_item *);
 bool	xfs_buf_resubmit_failed_buffers(struct xfs_buf *,
diff --git a/fs/xfs/xfs_dir2_readdir.c b/fs/xfs/xfs_dir2_readdir.c
index 5142e64e2345..283df898dd9f 100644
--- a/fs/xfs/xfs_dir2_readdir.c
+++ b/fs/xfs/xfs_dir2_readdir.c
@@ -6,17 +6,14 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_bit.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_dir2.h"
 #include "xfs_dir2_priv.h"
-#include "xfs_error.h"
 #include "xfs_trace.h"
 #include "xfs_bmap.h"
 #include "xfs_trans.h"
diff --git a/fs/xfs/xfs_discard.c b/fs/xfs/xfs_discard.c
index 93f07edafd81..8ec7aab89044 100644
--- a/fs/xfs/xfs_discard.c
+++ b/fs/xfs/xfs_discard.c
@@ -4,19 +4,17 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_quota.h"
-#include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_alloc_btree.h"
 #include "xfs_alloc.h"
 #include "xfs_error.h"
 #include "xfs_extent_busy.h"
-#include "xfs_discard.h"
 #include "xfs_trace.h"
 #include "xfs_log.h"
 
@@ -161,9 +159,19 @@ xfs_ioc_trim(
 		return -EPERM;
 	if (!blk_queue_discard(q))
 		return -EOPNOTSUPP;
+
+	/*
+	 * We haven't recovered the log, so we cannot use our bnobt-guided
+	 * storage zapping commands.
+	 */
+	if (mp->m_flags & XFS_MOUNT_NORECOVERY)
+		return -EROFS;
+
 	if (copy_from_user(&range, urange, sizeof(range)))
 		return -EFAULT;
 
+	range.minlen = max_t(u64, granularity, range.minlen);
+	minlen = BTOBB(range.minlen);
 	/*
 	 * Truncating down the len isn't actually quite correct, but using
 	 * BBTOB would mean we trivially get overflows for values
@@ -178,7 +186,6 @@ xfs_ioc_trim(
 
 	start = BTOBB(range.start);
 	end = start + BTOBBT(range.len) - 1;
-	minlen = BTOBB(max_t(u64, granularity, range.minlen));
 
 	if (end > XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks) - 1)
 		end = XFS_FSB_TO_BB(mp, mp->m_sb.sb_dblocks)- 1;
diff --git a/fs/xfs/xfs_dquot.c b/fs/xfs/xfs_dquot.c
index 87e6dd5326d5..fb1ad4483081 100644
--- a/fs/xfs/xfs_dquot.c
+++ b/fs/xfs/xfs_dquot.c
@@ -14,16 +14,12 @@
 #include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
-#include "xfs_alloc.h"
 #include "xfs_quota.h"
-#include "xfs_error.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_trans_space.h"
 #include "xfs_trans_priv.h"
 #include "xfs_qm.h"
-#include "xfs_cksum.h"
 #include "xfs_trace.h"
 #include "xfs_log.h"
 #include "xfs_bmap_btree.h"
@@ -277,7 +273,8 @@ xfs_dquot_set_prealloc_limits(struct xfs_dquot *dqp)
 
 /*
  * Ensure that the given in-core dquot has a buffer on disk backing it, and
- * return the buffer. This is called when the bmapi finds a hole.
+ * return the buffer locked and held. This is called when the bmapi finds a
+ * hole.
  */
 STATIC int
 xfs_dquot_disk_alloc(
@@ -355,13 +352,14 @@ xfs_dquot_disk_alloc(
 	 * If everything succeeds, the caller of this function is returned a
 	 * buffer that is locked and held to the transaction.  The caller
 	 * is responsible for unlocking any buffer passed back, either
-	 * manually or by committing the transaction.
+	 * manually or by committing the transaction.  On error, the buffer is
+	 * released and not passed back.
 	 */
 	xfs_trans_bhold(tp, bp);
 	error = xfs_defer_finish(tpp);
-	tp = *tpp;
 	if (error) {
-		xfs_buf_relse(bp);
+		xfs_trans_bhold_release(*tpp, bp);
+		xfs_trans_brelse(*tpp, bp);
 		return error;
 	}
 	*bpp = bp;
@@ -521,7 +519,6 @@ xfs_qm_dqread_alloc(
 	struct xfs_buf		**bpp)
 {
 	struct xfs_trans	*tp;
-	struct xfs_buf		*bp;
 	int			error;
 
 	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_qm_dqalloc,
@@ -529,7 +526,7 @@ xfs_qm_dqread_alloc(
 	if (error)
 		goto err;
 
-	error = xfs_dquot_disk_alloc(&tp, dqp, &bp);
+	error = xfs_dquot_disk_alloc(&tp, dqp, bpp);
 	if (error)
 		goto err_cancel;
 
@@ -539,10 +536,10 @@ xfs_qm_dqread_alloc(
 		 * Buffer was held to the transaction, so we have to unlock it
 		 * manually here because we're not passing it back.
 		 */
-		xfs_buf_relse(bp);
+		xfs_buf_relse(*bpp);
+		*bpp = NULL;
 		goto err;
 	}
-	*bpp = bp;
 	return 0;
 
 err_cancel:
@@ -1242,7 +1239,7 @@ xfs_qm_exit(void)
 /*
  * Iterate every dquot of a particular type.  The caller must ensure that the
  * particular quota type is active.  iter_fn can return negative error codes,
- * or XFS_BTREE_QUERY_RANGE_ABORT to indicate that it wants to stop iterating.
+ * or XFS_ITER_ABORT to indicate that it wants to stop iterating.
  */
 int
 xfs_qm_dqiterate(
diff --git a/fs/xfs/xfs_dquot.h b/fs/xfs/xfs_dquot.h
index 64bd8640f6e8..4fe85709d55d 100644
--- a/fs/xfs/xfs_dquot.h
+++ b/fs/xfs/xfs_dquot.h
@@ -34,7 +34,6 @@ typedef struct xfs_dquot {
 	uint		 dq_flags;	/* various flags (XFS_DQ_*) */
 	struct list_head q_lru;		/* global free list of dquots */
 	struct xfs_mount*q_mount;	/* filesystem this relates to */
-	struct xfs_trans*q_transp;	/* trans this belongs to currently */
 	uint		 q_nrefs;	/* # active refs from inodes */
 	xfs_daddr_t	 q_blkno;	/* blkno of dquot buffer */
 	int		 q_bufoffset;	/* off of dq in buffer (# dquots) */
diff --git a/fs/xfs/xfs_dquot_item.c b/fs/xfs/xfs_dquot_item.c
index 7dedd17c4813..282ec5af293e 100644
--- a/fs/xfs/xfs_dquot_item.c
+++ b/fs/xfs/xfs_dquot_item.c
@@ -5,13 +5,13 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
 #include "xfs_quota.h"
-#include "xfs_error.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_trans_priv.h"
@@ -94,18 +94,6 @@ xfs_qm_dquot_logitem_unpin(
 		wake_up(&dqp->q_pinwait);
 }
 
-STATIC xfs_lsn_t
-xfs_qm_dquot_logitem_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	/*
-	 * We always re-log the entire dquot when it becomes dirty,
-	 * so, the latest copy _is_ the only one that matters.
-	 */
-	return lsn;
-}
-
 /*
  * This is called to wait for the given dquot to be unpinned.
  * Most of these pin/unpin routines are plagiarized from inode code.
@@ -209,14 +197,8 @@ out_unlock:
 	return rval;
 }
 
-/*
- * Unlock the dquot associated with the log item.
- * Clear the fields of the dquot and dquot log item that
- * are specific to the current transaction.  If the
- * hold flags is set, do not unlock the dquot.
- */
 STATIC void
-xfs_qm_dquot_logitem_unlock(
+xfs_qm_dquot_logitem_release(
 	struct xfs_log_item	*lip)
 {
 	struct xfs_dquot	*dqp = DQUOT_ITEM(lip)->qli_dquot;
@@ -224,11 +206,6 @@ xfs_qm_dquot_logitem_unlock(
 	ASSERT(XFS_DQ_IS_LOCKED(dqp));
 
 	/*
-	 * Clear the transaction pointer in the dquot
-	 */
-	dqp->q_transp = NULL;
-
-	/*
 	 * dquots are never 'held' from getting unlocked at the end of
 	 * a transaction.  Their locking and unlocking is hidden inside the
 	 * transaction layer, within trans_commit. Hence, no LI_HOLD flag
@@ -237,30 +214,22 @@ xfs_qm_dquot_logitem_unlock(
 	xfs_dqunlock(dqp);
 }
 
-/*
- * this needs to stamp an lsn into the dquot, I think.
- * rpc's that look at user dquot's would then have to
- * push on the dependency recorded in the dquot
- */
 STATIC void
 xfs_qm_dquot_logitem_committing(
 	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+	xfs_lsn_t		commit_lsn)
 {
+	return xfs_qm_dquot_logitem_release(lip);
 }
 
-/*
- * This is the ops vector for dquots
- */
 static const struct xfs_item_ops xfs_dquot_item_ops = {
 	.iop_size	= xfs_qm_dquot_logitem_size,
 	.iop_format	= xfs_qm_dquot_logitem_format,
 	.iop_pin	= xfs_qm_dquot_logitem_pin,
 	.iop_unpin	= xfs_qm_dquot_logitem_unpin,
-	.iop_unlock	= xfs_qm_dquot_logitem_unlock,
-	.iop_committed	= xfs_qm_dquot_logitem_committed,
+	.iop_release	= xfs_qm_dquot_logitem_release,
+	.iop_committing	= xfs_qm_dquot_logitem_committing,
 	.iop_push	= xfs_qm_dquot_logitem_push,
-	.iop_committing = xfs_qm_dquot_logitem_committing,
 	.iop_error	= xfs_dquot_item_error
 };
 
@@ -320,26 +289,6 @@ xfs_qm_qoff_logitem_format(
 }
 
 /*
- * Pinning has no meaning for an quotaoff item, so just return.
- */
-STATIC void
-xfs_qm_qoff_logitem_pin(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
- * Since pinning has no meaning for an quotaoff item, unpinning does
- * not either.
- */
-STATIC void
-xfs_qm_qoff_logitem_unpin(
-	struct xfs_log_item	*lip,
-	int			remove)
-{
-}
-
-/*
  * There isn't much you can do to push a quotaoff item.  It is simply
  * stuck waiting for the log to be flushed to disk.
  */
@@ -351,28 +300,6 @@ xfs_qm_qoff_logitem_push(
 	return XFS_ITEM_LOCKED;
 }
 
-/*
- * Quotaoff items have no locking or pushing, so return failure
- * so that the caller doesn't bother with us.
- */
-STATIC void
-xfs_qm_qoff_logitem_unlock(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
- * The quotaoff-start-item is logged only once and cannot be moved in the log,
- * so simply return the lsn at which it's been logged.
- */
-STATIC xfs_lsn_t
-xfs_qm_qoff_logitem_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	return lsn;
-}
-
 STATIC xfs_lsn_t
 xfs_qm_qoffend_logitem_committed(
 	struct xfs_log_item	*lip,
@@ -396,50 +323,17 @@ xfs_qm_qoffend_logitem_committed(
 	return (xfs_lsn_t)-1;
 }
 
-/*
- * XXX rcc - don't know quite what to do with this.  I think we can
- * just ignore it.  The only time that isn't the case is if we allow
- * the client to somehow see that quotas have been turned off in which
- * we can't allow that to get back until the quotaoff hits the disk.
- * So how would that happen?  Also, do we need different routines for
- * quotaoff start and quotaoff end?  I suspect the answer is yes but
- * to be sure, I need to look at the recovery code and see how quota off
- * recovery is handled (do we roll forward or back or do something else).
- * If we roll forwards or backwards, then we need two separate routines,
- * one that does nothing and one that stamps in the lsn that matters
- * (truly makes the quotaoff irrevocable).  If we do something else,
- * then maybe we don't need two.
- */
-STATIC void
-xfs_qm_qoff_logitem_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		commit_lsn)
-{
-}
-
 static const struct xfs_item_ops xfs_qm_qoffend_logitem_ops = {
 	.iop_size	= xfs_qm_qoff_logitem_size,
 	.iop_format	= xfs_qm_qoff_logitem_format,
-	.iop_pin	= xfs_qm_qoff_logitem_pin,
-	.iop_unpin	= xfs_qm_qoff_logitem_unpin,
-	.iop_unlock	= xfs_qm_qoff_logitem_unlock,
 	.iop_committed	= xfs_qm_qoffend_logitem_committed,
 	.iop_push	= xfs_qm_qoff_logitem_push,
-	.iop_committing = xfs_qm_qoff_logitem_committing
 };
 
-/*
- * This is the ops vector shared by all quotaoff-start log items.
- */
 static const struct xfs_item_ops xfs_qm_qoff_logitem_ops = {
 	.iop_size	= xfs_qm_qoff_logitem_size,
 	.iop_format	= xfs_qm_qoff_logitem_format,
-	.iop_pin	= xfs_qm_qoff_logitem_pin,
-	.iop_unpin	= xfs_qm_qoff_logitem_unpin,
-	.iop_unlock	= xfs_qm_qoff_logitem_unlock,
-	.iop_committed	= xfs_qm_qoff_logitem_committed,
 	.iop_push	= xfs_qm_qoff_logitem_push,
-	.iop_committing = xfs_qm_qoff_logitem_committing
 };
 
 /*
diff --git a/fs/xfs/xfs_dquot_item.h b/fs/xfs/xfs_dquot_item.h
index db9df710a308..1aed34ccdabc 100644
--- a/fs/xfs/xfs_dquot_item.h
+++ b/fs/xfs/xfs_dquot_item.h
@@ -12,13 +12,13 @@ struct xfs_mount;
 struct xfs_qoff_logitem;
 
 typedef struct xfs_dq_logitem {
-	xfs_log_item_t		 qli_item;	   /* common portion */
+	struct xfs_log_item	 qli_item;	   /* common portion */
 	struct xfs_dquot	*qli_dquot;	   /* dquot ptr */
 	xfs_lsn_t		 qli_flush_lsn;	   /* lsn at last flush */
 } xfs_dq_logitem_t;
 
 typedef struct xfs_qoff_logitem {
-	xfs_log_item_t		 qql_item;	/* common portion */
+	struct xfs_log_item	 qql_item;	/* common portion */
 	struct xfs_qoff_logitem *qql_start_lip; /* qoff-start logitem, if any */
 	unsigned int		qql_flags;
 } xfs_qoff_logitem_t;
diff --git a/fs/xfs/xfs_error.c b/fs/xfs/xfs_error.c
index 9866f542e77b..544c9482a0ef 100644
--- a/fs/xfs/xfs_error.c
+++ b/fs/xfs/xfs_error.c
@@ -4,6 +4,7 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_fs.h"
 #include "xfs_log_format.h"
@@ -51,6 +52,7 @@ static unsigned int xfs_errortag_random_default[] = {
 	XFS_RANDOM_BUF_LRU_REF,
 	XFS_RANDOM_FORCE_SCRUB_REPAIR,
 	XFS_RANDOM_FORCE_SUMMARY_RECALC,
+	XFS_RANDOM_IUNLINK_FALLBACK,
 };
 
 struct xfs_errortag_attr {
@@ -159,6 +161,7 @@ XFS_ERRORTAG_ATTR_RW(log_item_pin,	XFS_ERRTAG_LOG_ITEM_PIN);
 XFS_ERRORTAG_ATTR_RW(buf_lru_ref,	XFS_ERRTAG_BUF_LRU_REF);
 XFS_ERRORTAG_ATTR_RW(force_repair,	XFS_ERRTAG_FORCE_SCRUB_REPAIR);
 XFS_ERRORTAG_ATTR_RW(bad_summary,	XFS_ERRTAG_FORCE_SUMMARY_RECALC);
+XFS_ERRORTAG_ATTR_RW(iunlink_fallback,	XFS_ERRTAG_IUNLINK_FALLBACK);
 
 static struct attribute *xfs_errortag_attrs[] = {
 	XFS_ERRORTAG_ATTR_LIST(noerror),
@@ -195,6 +198,7 @@ static struct attribute *xfs_errortag_attrs[] = {
 	XFS_ERRORTAG_ATTR_LIST(buf_lru_ref),
 	XFS_ERRORTAG_ATTR_LIST(force_repair),
 	XFS_ERRORTAG_ATTR_LIST(bad_summary),
+	XFS_ERRORTAG_ATTR_LIST(iunlink_fallback),
 	NULL,
 };
 
@@ -350,14 +354,15 @@ xfs_buf_verifier_error(
 	size_t			bufsz,
 	xfs_failaddr_t		failaddr)
 {
-	struct xfs_mount	*mp = bp->b_target->bt_mount;
+	struct xfs_mount	*mp = bp->b_mount;
 	xfs_failaddr_t		fa;
 	int			sz;
 
 	fa = failaddr ? failaddr : __return_address;
 	__xfs_buf_ioerror(bp, error, fa);
 
-	xfs_alert(mp, "Metadata %s detected at %pS, %s block 0x%llx %s",
+	xfs_alert_tag(mp, XFS_PTAG_VERIFIER_ERROR,
+		  "Metadata %s detected at %pS, %s block 0x%llx %s",
 		  bp->b_error == -EFSBADCRC ? "CRC error" : "corruption",
 		  fa, bp->b_ops->name, bp->b_bn, name);
 
diff --git a/fs/xfs/xfs_error.h b/fs/xfs/xfs_error.h
index 246d3e989c6c..602aa7d62b66 100644
--- a/fs/xfs/xfs_error.h
+++ b/fs/xfs/xfs_error.h
@@ -98,5 +98,6 @@ extern int xfs_errortag_clearall(struct xfs_mount *mp);
 #define		XFS_PTAG_SHUTDOWN_IOERROR	0x00000020
 #define		XFS_PTAG_SHUTDOWN_LOGERROR	0x00000040
 #define		XFS_PTAG_FSBLOCK_ZERO		0x00000080
+#define		XFS_PTAG_VERIFIER_ERROR		0x00000100
 
 #endif	/* __XFS_ERROR_H__ */
diff --git a/fs/xfs/xfs_export.c b/fs/xfs/xfs_export.c
index f2284ceb129f..f1372f9046e3 100644
--- a/fs/xfs/xfs_export.c
+++ b/fs/xfs/xfs_export.c
@@ -4,18 +4,16 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_dir2.h"
 #include "xfs_export.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
 #include "xfs_inode_item.h"
-#include "xfs_trace.h"
 #include "xfs_icache.h"
 #include "xfs_log.h"
 #include "xfs_pnfs.h"
diff --git a/fs/xfs/xfs_extfree_item.c b/fs/xfs/xfs_extfree_item.c
index 74ddf66f4cfe..86f6512d6864 100644
--- a/fs/xfs/xfs_extfree_item.c
+++ b/fs/xfs/xfs_extfree_item.c
@@ -9,14 +9,18 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
+#include "xfs_shared.h"
 #include "xfs_mount.h"
+#include "xfs_defer.h"
 #include "xfs_trans.h"
 #include "xfs_trans_priv.h"
-#include "xfs_buf_item.h"
 #include "xfs_extfree_item.h"
 #include "xfs_log.h"
 #include "xfs_btree.h"
 #include "xfs_rmap.h"
+#include "xfs_alloc.h"
+#include "xfs_bmap.h"
+#include "xfs_trace.h"
 
 
 kmem_zone_t	*xfs_efi_zone;
@@ -107,15 +111,6 @@ xfs_efi_item_format(
 
 
 /*
- * Pinning has no meaning for an efi item, so just return.
- */
-STATIC void
-xfs_efi_item_pin(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
  * The unpin operation is the last place an EFI is manipulated in the log. It is
  * either inserted in the AIL or aborted in the event of a log I/O error. In
  * either case, the EFI transaction has been successfully committed to make it
@@ -133,71 +128,22 @@ xfs_efi_item_unpin(
 }
 
 /*
- * Efi items have no locking or pushing.  However, since EFIs are pulled from
- * the AIL when their corresponding EFDs are committed to disk, their situation
- * is very similar to being pinned.  Return XFS_ITEM_PINNED so that the caller
- * will eventually flush the log.  This should help in getting the EFI out of
- * the AIL.
- */
-STATIC uint
-xfs_efi_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
-{
-	return XFS_ITEM_PINNED;
-}
-
-/*
  * The EFI has been either committed or aborted if the transaction has been
  * cancelled. If the transaction was cancelled, an EFD isn't going to be
  * constructed and thus we free the EFI here directly.
  */
 STATIC void
-xfs_efi_item_unlock(
+xfs_efi_item_release(
 	struct xfs_log_item	*lip)
 {
-	if (test_bit(XFS_LI_ABORTED, &lip->li_flags))
-		xfs_efi_release(EFI_ITEM(lip));
-}
-
-/*
- * The EFI is logged only once and cannot be moved in the log, so simply return
- * the lsn at which it's been logged.
- */
-STATIC xfs_lsn_t
-xfs_efi_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	return lsn;
-}
-
-/*
- * The EFI dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
-STATIC void
-xfs_efi_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
+	xfs_efi_release(EFI_ITEM(lip));
 }
 
-/*
- * This is the ops vector shared by all efi log items.
- */
 static const struct xfs_item_ops xfs_efi_item_ops = {
 	.iop_size	= xfs_efi_item_size,
 	.iop_format	= xfs_efi_item_format,
-	.iop_pin	= xfs_efi_item_pin,
 	.iop_unpin	= xfs_efi_item_unpin,
-	.iop_unlock	= xfs_efi_item_unlock,
-	.iop_committed	= xfs_efi_item_committed,
-	.iop_push	= xfs_efi_item_push,
-	.iop_committing = xfs_efi_item_committing
+	.iop_release	= xfs_efi_item_release,
 };
 
 
@@ -349,136 +295,298 @@ xfs_efd_item_format(
 }
 
 /*
- * Pinning has no meaning for an efd item, so just return.
+ * The EFD is either committed or aborted if the transaction is cancelled. If
+ * the transaction is cancelled, drop our reference to the EFI and free the EFD.
  */
 STATIC void
-xfs_efd_item_pin(
+xfs_efd_item_release(
 	struct xfs_log_item	*lip)
 {
+	struct xfs_efd_log_item	*efdp = EFD_ITEM(lip);
+
+	xfs_efi_release(efdp->efd_efip);
+	xfs_efd_item_free(efdp);
 }
 
+static const struct xfs_item_ops xfs_efd_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
+	.iop_size	= xfs_efd_item_size,
+	.iop_format	= xfs_efd_item_format,
+	.iop_release	= xfs_efd_item_release,
+};
+
 /*
- * Since pinning has no meaning for an efd item, unpinning does
- * not either.
+ * Allocate an "extent free done" log item that will hold nextents worth of
+ * extents.  The caller must use all nextents extents, because we are not
+ * flexible about this at all.
  */
-STATIC void
-xfs_efd_item_unpin(
-	struct xfs_log_item	*lip,
-	int			remove)
+static struct xfs_efd_log_item *
+xfs_trans_get_efd(
+	struct xfs_trans		*tp,
+	struct xfs_efi_log_item		*efip,
+	unsigned int			nextents)
 {
+	struct xfs_efd_log_item		*efdp;
+
+	ASSERT(nextents > 0);
+
+	if (nextents > XFS_EFD_MAX_FAST_EXTENTS) {
+		efdp = kmem_zalloc(sizeof(struct xfs_efd_log_item) +
+				(nextents - 1) * sizeof(struct xfs_extent),
+				KM_SLEEP);
+	} else {
+		efdp = kmem_zone_zalloc(xfs_efd_zone, KM_SLEEP);
+	}
+
+	xfs_log_item_init(tp->t_mountp, &efdp->efd_item, XFS_LI_EFD,
+			  &xfs_efd_item_ops);
+	efdp->efd_efip = efip;
+	efdp->efd_format.efd_nextents = nextents;
+	efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;
+
+	xfs_trans_add_item(tp, &efdp->efd_item);
+	return efdp;
 }
 
 /*
- * There isn't much you can do to push on an efd item.  It is simply stuck
- * waiting for the log to be flushed to disk.
+ * Free an extent and log it to the EFD. Note that the transaction is marked
+ * dirty regardless of whether the extent free succeeds or fails to support the
+ * EFI/EFD lifecycle rules.
  */
-STATIC uint
-xfs_efd_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
+static int
+xfs_trans_free_extent(
+	struct xfs_trans		*tp,
+	struct xfs_efd_log_item		*efdp,
+	xfs_fsblock_t			start_block,
+	xfs_extlen_t			ext_len,
+	const struct xfs_owner_info	*oinfo,
+	bool				skip_discard)
 {
-	return XFS_ITEM_PINNED;
+	struct xfs_mount		*mp = tp->t_mountp;
+	struct xfs_extent		*extp;
+	uint				next_extent;
+	xfs_agnumber_t			agno = XFS_FSB_TO_AGNO(mp, start_block);
+	xfs_agblock_t			agbno = XFS_FSB_TO_AGBNO(mp,
+								start_block);
+	int				error;
+
+	trace_xfs_bmap_free_deferred(tp->t_mountp, agno, 0, agbno, ext_len);
+
+	error = __xfs_free_extent(tp, start_block, ext_len,
+				  oinfo, XFS_AG_RESV_NONE, skip_discard);
+	/*
+	 * Mark the transaction dirty, even on error. This ensures the
+	 * transaction is aborted, which:
+	 *
+	 * 1.) releases the EFI and frees the EFD
+	 * 2.) shuts down the filesystem
+	 */
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
+
+	next_extent = efdp->efd_next_extent;
+	ASSERT(next_extent < efdp->efd_format.efd_nextents);
+	extp = &(efdp->efd_format.efd_extents[next_extent]);
+	extp->ext_start = start_block;
+	extp->ext_len = ext_len;
+	efdp->efd_next_extent++;
+
+	return error;
 }
 
-/*
- * The EFD is either committed or aborted if the transaction is cancelled. If
- * the transaction is cancelled, drop our reference to the EFI and free the EFD.
- */
-STATIC void
-xfs_efd_item_unlock(
-	struct xfs_log_item	*lip)
+/* Sort bmap items by AG. */
+static int
+xfs_extent_free_diff_items(
+	void				*priv,
+	struct list_head		*a,
+	struct list_head		*b)
 {
-	struct xfs_efd_log_item	*efdp = EFD_ITEM(lip);
+	struct xfs_mount		*mp = priv;
+	struct xfs_extent_free_item	*ra;
+	struct xfs_extent_free_item	*rb;
+
+	ra = container_of(a, struct xfs_extent_free_item, xefi_list);
+	rb = container_of(b, struct xfs_extent_free_item, xefi_list);
+	return  XFS_FSB_TO_AGNO(mp, ra->xefi_startblock) -
+		XFS_FSB_TO_AGNO(mp, rb->xefi_startblock);
+}
 
-	if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) {
-		xfs_efi_release(efdp->efd_efip);
-		xfs_efd_item_free(efdp);
-	}
+/* Get an EFI. */
+STATIC void *
+xfs_extent_free_create_intent(
+	struct xfs_trans		*tp,
+	unsigned int			count)
+{
+	struct xfs_efi_log_item		*efip;
+
+	ASSERT(tp != NULL);
+	ASSERT(count > 0);
+
+	efip = xfs_efi_init(tp->t_mountp, count);
+	ASSERT(efip != NULL);
+
+	/*
+	 * Get a log_item_desc to point at the new item.
+	 */
+	xfs_trans_add_item(tp, &efip->efi_item);
+	return efip;
 }
 
-/*
- * When the efd item is committed to disk, all we need to do is delete our
- * reference to our partner efi item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from further
- * referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_efd_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+/* Log a free extent to the intent item. */
+STATIC void
+xfs_extent_free_log_item(
+	struct xfs_trans		*tp,
+	void				*intent,
+	struct list_head		*item)
 {
-	struct xfs_efd_log_item	*efdp = EFD_ITEM(lip);
+	struct xfs_efi_log_item		*efip = intent;
+	struct xfs_extent_free_item	*free;
+	uint				next_extent;
+	struct xfs_extent		*extp;
+
+	free = container_of(item, struct xfs_extent_free_item, xefi_list);
+
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	set_bit(XFS_LI_DIRTY, &efip->efi_item.li_flags);
 
 	/*
-	 * Drop the EFI reference regardless of whether the EFD has been
-	 * aborted. Once the EFD transaction is constructed, it is the sole
-	 * responsibility of the EFD to release the EFI (even if the EFI is
-	 * aborted due to log I/O error).
+	 * atomic_inc_return gives us the value after the increment;
+	 * we want to use it as an array index so we need to subtract 1 from
+	 * it.
 	 */
-	xfs_efi_release(efdp->efd_efip);
-	xfs_efd_item_free(efdp);
+	next_extent = atomic_inc_return(&efip->efi_next_extent) - 1;
+	ASSERT(next_extent < efip->efi_format.efi_nextents);
+	extp = &efip->efi_format.efi_extents[next_extent];
+	extp->ext_start = free->xefi_startblock;
+	extp->ext_len = free->xefi_blockcount;
+}
 
-	return (xfs_lsn_t)-1;
+/* Get an EFD so we can process all the free extents. */
+STATIC void *
+xfs_extent_free_create_done(
+	struct xfs_trans		*tp,
+	void				*intent,
+	unsigned int			count)
+{
+	return xfs_trans_get_efd(tp, intent, count);
 }
 
-/*
- * The EFD dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
+/* Process a free extent. */
+STATIC int
+xfs_extent_free_finish_item(
+	struct xfs_trans		*tp,
+	struct list_head		*item,
+	void				*done_item,
+	void				**state)
+{
+	struct xfs_extent_free_item	*free;
+	int				error;
+
+	free = container_of(item, struct xfs_extent_free_item, xefi_list);
+	error = xfs_trans_free_extent(tp, done_item,
+			free->xefi_startblock,
+			free->xefi_blockcount,
+			&free->xefi_oinfo, free->xefi_skip_discard);
+	kmem_free(free);
+	return error;
+}
+
+/* Abort all pending EFIs. */
 STATIC void
-xfs_efd_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+xfs_extent_free_abort_intent(
+	void				*intent)
 {
+	xfs_efi_release(intent);
 }
 
-/*
- * This is the ops vector shared by all efd log items.
- */
-static const struct xfs_item_ops xfs_efd_item_ops = {
-	.iop_size	= xfs_efd_item_size,
-	.iop_format	= xfs_efd_item_format,
-	.iop_pin	= xfs_efd_item_pin,
-	.iop_unpin	= xfs_efd_item_unpin,
-	.iop_unlock	= xfs_efd_item_unlock,
-	.iop_committed	= xfs_efd_item_committed,
-	.iop_push	= xfs_efd_item_push,
-	.iop_committing = xfs_efd_item_committing
+/* Cancel a free extent. */
+STATIC void
+xfs_extent_free_cancel_item(
+	struct list_head		*item)
+{
+	struct xfs_extent_free_item	*free;
+
+	free = container_of(item, struct xfs_extent_free_item, xefi_list);
+	kmem_free(free);
+}
+
+const struct xfs_defer_op_type xfs_extent_free_defer_type = {
+	.max_items	= XFS_EFI_MAX_FAST_EXTENTS,
+	.diff_items	= xfs_extent_free_diff_items,
+	.create_intent	= xfs_extent_free_create_intent,
+	.abort_intent	= xfs_extent_free_abort_intent,
+	.log_item	= xfs_extent_free_log_item,
+	.create_done	= xfs_extent_free_create_done,
+	.finish_item	= xfs_extent_free_finish_item,
+	.cancel_item	= xfs_extent_free_cancel_item,
 };
 
 /*
- * Allocate and initialize an efd item with the given number of extents.
+ * AGFL blocks are accounted differently in the reserve pools and are not
+ * inserted into the busy extent list.
  */
-struct xfs_efd_log_item *
-xfs_efd_init(
-	struct xfs_mount	*mp,
-	struct xfs_efi_log_item	*efip,
-	uint			nextents)
-
+STATIC int
+xfs_agfl_free_finish_item(
+	struct xfs_trans		*tp,
+	struct list_head		*item,
+	void				*done_item,
+	void				**state)
 {
-	struct xfs_efd_log_item	*efdp;
-	uint			size;
+	struct xfs_mount		*mp = tp->t_mountp;
+	struct xfs_efd_log_item		*efdp = done_item;
+	struct xfs_extent_free_item	*free;
+	struct xfs_extent		*extp;
+	struct xfs_buf			*agbp;
+	int				error;
+	xfs_agnumber_t			agno;
+	xfs_agblock_t			agbno;
+	uint				next_extent;
+
+	free = container_of(item, struct xfs_extent_free_item, xefi_list);
+	ASSERT(free->xefi_blockcount == 1);
+	agno = XFS_FSB_TO_AGNO(mp, free->xefi_startblock);
+	agbno = XFS_FSB_TO_AGBNO(mp, free->xefi_startblock);
+
+	trace_xfs_agfl_free_deferred(mp, agno, 0, agbno, free->xefi_blockcount);
+
+	error = xfs_alloc_read_agf(mp, tp, agno, 0, &agbp);
+	if (!error)
+		error = xfs_free_agfl_block(tp, agno, agbno, agbp,
+					    &free->xefi_oinfo);
 
-	ASSERT(nextents > 0);
-	if (nextents > XFS_EFD_MAX_FAST_EXTENTS) {
-		size = (uint)(sizeof(xfs_efd_log_item_t) +
-			((nextents - 1) * sizeof(xfs_extent_t)));
-		efdp = kmem_zalloc(size, KM_SLEEP);
-	} else {
-		efdp = kmem_zone_zalloc(xfs_efd_zone, KM_SLEEP);
-	}
+	/*
+	 * Mark the transaction dirty, even on error. This ensures the
+	 * transaction is aborted, which:
+	 *
+	 * 1.) releases the EFI and frees the EFD
+	 * 2.) shuts down the filesystem
+	 */
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
 
-	xfs_log_item_init(mp, &efdp->efd_item, XFS_LI_EFD, &xfs_efd_item_ops);
-	efdp->efd_efip = efip;
-	efdp->efd_format.efd_nextents = nextents;
-	efdp->efd_format.efd_efi_id = efip->efi_format.efi_id;
+	next_extent = efdp->efd_next_extent;
+	ASSERT(next_extent < efdp->efd_format.efd_nextents);
+	extp = &(efdp->efd_format.efd_extents[next_extent]);
+	extp->ext_start = free->xefi_startblock;
+	extp->ext_len = free->xefi_blockcount;
+	efdp->efd_next_extent++;
 
-	return efdp;
+	kmem_free(free);
+	return error;
 }
 
+/* sub-type with special handling for AGFL deferred frees */
+const struct xfs_defer_op_type xfs_agfl_free_defer_type = {
+	.max_items	= XFS_EFI_MAX_FAST_EXTENTS,
+	.diff_items	= xfs_extent_free_diff_items,
+	.create_intent	= xfs_extent_free_create_intent,
+	.abort_intent	= xfs_extent_free_abort_intent,
+	.log_item	= xfs_extent_free_log_item,
+	.create_done	= xfs_extent_free_create_done,
+	.finish_item	= xfs_agfl_free_finish_item,
+	.cancel_item	= xfs_extent_free_cancel_item,
+};
+
 /*
  * Process an extent free intent item that was recovered from
  * the log.  We need to free the extents that it describes.
diff --git a/fs/xfs/xfs_extfree_item.h b/fs/xfs/xfs_extfree_item.h
index 2a6a895ca73e..16aaab06d4ec 100644
--- a/fs/xfs/xfs_extfree_item.h
+++ b/fs/xfs/xfs_extfree_item.h
@@ -51,7 +51,7 @@ struct kmem_zone;
  * AIL, so at this point both the EFI and EFD are freed.
  */
 typedef struct xfs_efi_log_item {
-	xfs_log_item_t		efi_item;
+	struct xfs_log_item	efi_item;
 	atomic_t		efi_refcount;
 	atomic_t		efi_next_extent;
 	unsigned long		efi_flags;	/* misc flags */
@@ -64,7 +64,7 @@ typedef struct xfs_efi_log_item {
  * have been freed.
  */
 typedef struct xfs_efd_log_item {
-	xfs_log_item_t		efd_item;
+	struct xfs_log_item	efd_item;
 	xfs_efi_log_item_t	*efd_efip;
 	uint			efd_next_extent;
 	xfs_efd_log_format_t	efd_format;
@@ -79,8 +79,6 @@ extern struct kmem_zone	*xfs_efi_zone;
 extern struct kmem_zone	*xfs_efd_zone;
 
 xfs_efi_log_item_t	*xfs_efi_init(struct xfs_mount *, uint);
-xfs_efd_log_item_t	*xfs_efd_init(struct xfs_mount *, xfs_efi_log_item_t *,
-				      uint);
 int			xfs_efi_copy_format(xfs_log_iovec_t *buf,
 					    xfs_efi_log_format_t *dst_efi_fmt);
 void			xfs_efi_item_free(xfs_efi_log_item_t *);
diff --git a/fs/xfs/xfs_file.c b/fs/xfs/xfs_file.c
index e47425071e65..e93bacbd49ae 100644
--- a/fs/xfs/xfs_file.c
+++ b/fs/xfs/xfs_file.c
@@ -10,14 +10,11 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
 #include "xfs_inode_item.h"
 #include "xfs_bmap.h"
 #include "xfs_bmap_util.h"
-#include "xfs_error.h"
 #include "xfs_dir2.h"
 #include "xfs_dir2_priv.h"
 #include "xfs_ioctl.h"
@@ -28,9 +25,7 @@
 #include "xfs_iomap.h"
 #include "xfs_reflink.h"
 
-#include <linux/dcache.h>
 #include <linux/falloc.h>
-#include <linux/pagevec.h>
 #include <linux/backing-dev.h>
 #include <linux/mman.h>
 
@@ -367,20 +362,7 @@ restart:
 	 * lock above.  Eventually we should look into a way to avoid
 	 * the pointless lock roundtrip.
 	 */
-	if (likely(!(file->f_mode & FMODE_NOCMTIME))) {
-		error = file_update_time(file);
-		if (error)
-			return error;
-	}
-
-	/*
-	 * If we're writing the file then make sure to clear the setuid and
-	 * setgid bits if the process is not being run by root.  This keeps
-	 * people from modifying setuid and setgid binaries.
-	 */
-	if (!IS_NOSEC(inode))
-		return file_remove_privs(file);
-	return 0;
+	return file_modified(file);
 }
 
 static int
@@ -392,6 +374,7 @@ xfs_dio_write_end_io(
 	struct inode		*inode = file_inode(iocb->ki_filp);
 	struct xfs_inode	*ip = XFS_I(inode);
 	loff_t			offset = iocb->ki_pos;
+	unsigned int		nofs_flag;
 	int			error = 0;
 
 	trace_xfs_end_io_direct_write(ip, offset, size);
@@ -408,10 +391,17 @@ xfs_dio_write_end_io(
 	 */
 	XFS_STATS_ADD(ip->i_mount, xs_write_bytes, size);
 
+	/*
+	 * We can allocate memory here while doing writeback on behalf of
+	 * memory reclaim.  To avoid memory allocation deadlocks set the
+	 * task-wide nofs context for the following operations.
+	 */
+	nofs_flag = memalloc_nofs_save();
+
 	if (flags & IOMAP_DIO_COW) {
 		error = xfs_reflink_end_cow(ip, offset, size);
 		if (error)
-			return error;
+			goto out;
 	}
 
 	/*
@@ -420,8 +410,10 @@ xfs_dio_write_end_io(
 	 * earlier allows a racing dio read to find unwritten extents before
 	 * they are converted.
 	 */
-	if (flags & IOMAP_DIO_UNWRITTEN)
-		return xfs_iomap_write_unwritten(ip, offset, size, true);
+	if (flags & IOMAP_DIO_UNWRITTEN) {
+		error = xfs_iomap_write_unwritten(ip, offset, size, true);
+		goto out;
+	}
 
 	/*
 	 * We need to update the in-core inode size here so that we don't end up
@@ -443,6 +435,8 @@ xfs_dio_write_end_io(
 		spin_unlock(&ip->i_flags_lock);
 	}
 
+out:
+	memalloc_nofs_restore(nofs_flag);
 	return error;
 }
 
@@ -507,7 +501,7 @@ xfs_file_dio_aio_write(
 		 * We can't properly handle unaligned direct I/O to reflink
 		 * files yet, as we can't unshare a partial block.
 		 */
-		if (xfs_is_reflink_inode(ip)) {
+		if (xfs_is_cow_inode(ip)) {
 			trace_xfs_reflink_bounce_dio_write(ip, iocb->ki_pos, count);
 			return -EREMCHG;
 		}
@@ -517,6 +511,9 @@ xfs_file_dio_aio_write(
 	}
 
 	if (iocb->ki_flags & IOCB_NOWAIT) {
+		/* unaligned dio always waits, bail */
+		if (unaligned_io)
+			return -EAGAIN;
 		if (!xfs_ilock_nowait(ip, iolock))
 			return -EAGAIN;
 	} else {
@@ -529,18 +526,14 @@ xfs_file_dio_aio_write(
 	count = iov_iter_count(from);
 
 	/*
-	 * If we are doing unaligned IO, wait for all other IO to drain,
-	 * otherwise demote the lock if we had to take the exclusive lock
-	 * for other reasons in xfs_file_aio_write_checks.
+	 * If we are doing unaligned IO, we can't allow any other overlapping IO
+	 * in-flight at the same time or we risk data corruption. Wait for all
+	 * other IO to drain before we submit. If the IO is aligned, demote the
+	 * iolock if we had to take the exclusive lock in
+	 * xfs_file_aio_write_checks() for other reasons.
 	 */
 	if (unaligned_io) {
-		/* If we are going to wait for other DIO to finish, bail */
-		if (iocb->ki_flags & IOCB_NOWAIT) {
-			if (atomic_read(&inode->i_dio_count))
-				return -EAGAIN;
-		} else {
-			inode_dio_wait(inode);
-		}
+		inode_dio_wait(inode);
 	} else if (iolock == XFS_IOLOCK_EXCL) {
 		xfs_ilock_demote(ip, XFS_IOLOCK_EXCL);
 		iolock = XFS_IOLOCK_SHARED;
@@ -548,6 +541,14 @@ xfs_file_dio_aio_write(
 
 	trace_xfs_file_direct_write(ip, count, iocb->ki_pos);
 	ret = iomap_dio_rw(iocb, from, &xfs_iomap_ops, xfs_dio_write_end_io);
+
+	/*
+	 * If unaligned, this is the only IO in-flight. If it has not yet
+	 * completed, wait on it before we release the iolock to prevent
+	 * subsequent overlapping IO.
+	 */
+	if (ret == -EIOCBQUEUED && unaligned_io)
+		inode_dio_wait(inode);
 out:
 	xfs_iunlock(ip, iolock);
 
@@ -872,14 +873,27 @@ xfs_file_fallocate(
 				goto out_unlock;
 		}
 
-		if (mode & FALLOC_FL_ZERO_RANGE)
+		if (mode & FALLOC_FL_ZERO_RANGE) {
 			error = xfs_zero_file_space(ip, offset, len);
-		else {
-			if (mode & FALLOC_FL_UNSHARE_RANGE) {
-				error = xfs_reflink_unshare(ip, offset, len);
-				if (error)
-					goto out_unlock;
+		} else if (mode & FALLOC_FL_UNSHARE_RANGE) {
+			error = xfs_reflink_unshare(ip, offset, len);
+			if (error)
+				goto out_unlock;
+
+			if (!xfs_is_always_cow_inode(ip)) {
+				error = xfs_alloc_file_space(ip, offset, len,
+						XFS_BMAPI_PREALLOC);
 			}
+		} else {
+			/*
+			 * If always_cow mode we can't use preallocations and
+			 * thus should not create them.
+			 */
+			if (xfs_is_always_cow_inode(ip)) {
+				error = -EOPNOTSUPP;
+				goto out_unlock;
+			}
+
 			error = xfs_alloc_file_space(ip, offset, len,
 						     XFS_BMAPI_PREALLOC);
 		}
@@ -1068,10 +1082,10 @@ xfs_file_llseek(
 	default:
 		return generic_file_llseek(file, offset, whence);
 	case SEEK_HOLE:
-		offset = iomap_seek_hole(inode, offset, &xfs_iomap_ops);
+		offset = iomap_seek_hole(inode, offset, &xfs_seek_iomap_ops);
 		break;
 	case SEEK_DATA:
-		offset = iomap_seek_data(inode, offset, &xfs_iomap_ops);
+		offset = iomap_seek_data(inode, offset, &xfs_seek_iomap_ops);
 		break;
 	}
 
@@ -1203,6 +1217,7 @@ const struct file_operations xfs_file_operations = {
 	.write_iter	= xfs_file_write_iter,
 	.splice_read	= generic_file_splice_read,
 	.splice_write	= iter_file_splice_write,
+	.iopoll		= iomap_dio_iopoll,
 	.unlocked_ioctl	= xfs_file_ioctl,
 #ifdef CONFIG_COMPAT
 	.compat_ioctl	= xfs_file_compat_ioctl,
diff --git a/fs/xfs/xfs_filestream.c b/fs/xfs/xfs_filestream.c
index 182501373af2..574a7a8b4736 100644
--- a/fs/xfs/xfs_filestream.c
+++ b/fs/xfs/xfs_filestream.c
@@ -5,22 +5,19 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
 #include "xfs_alloc.h"
 #include "xfs_mru_cache.h"
-#include "xfs_filestream.h"
 #include "xfs_trace.h"
 #include "xfs_ag_resv.h"
 #include "xfs_trans.h"
-#include "xfs_shared.h"
 
 struct xfs_fstrm_item {
 	struct xfs_mru_cache_elem	mru;
diff --git a/fs/xfs/xfs_fsmap.c b/fs/xfs/xfs_fsmap.c
index 3d76a9e35870..5a8f9641562a 100644
--- a/fs/xfs/xfs_fsmap.c
+++ b/fs/xfs/xfs_fsmap.c
@@ -9,16 +9,12 @@
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_error.h"
 #include "xfs_btree.h"
 #include "xfs_rmap_btree.h"
 #include "xfs_trace.h"
-#include "xfs_log.h"
 #include "xfs_rmap.h"
 #include "xfs_alloc.h"
 #include "xfs_bit.h"
diff --git a/fs/xfs/xfs_fsops.c b/fs/xfs/xfs_fsops.c
index f3ef70c542e1..3e61d0cc23f8 100644
--- a/fs/xfs/xfs_fsops.c
+++ b/fs/xfs/xfs_fsops.c
@@ -11,15 +11,11 @@
 #include "xfs_trans_resv.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_trans.h"
 #include "xfs_error.h"
-#include "xfs_btree.h"
 #include "xfs_alloc.h"
 #include "xfs_fsops.h"
 #include "xfs_trans_space.h"
-#include "xfs_rtalloc.h"
-#include "xfs_trace.h"
 #include "xfs_log.h"
 #include "xfs_ag.h"
 #include "xfs_ag_resv.h"
@@ -251,9 +247,9 @@ xfs_growfs_data(
 	if (mp->m_sb.sb_imax_pct) {
 		uint64_t icount = mp->m_sb.sb_dblocks * mp->m_sb.sb_imax_pct;
 		do_div(icount, 100);
-		mp->m_maxicount = XFS_FSB_TO_INO(mp, icount);
+		M_IGEO(mp)->maxicount = XFS_FSB_TO_INO(mp, icount);
 	} else
-		mp->m_maxicount = 0;
+		M_IGEO(mp)->maxicount = 0;
 
 	/* Update secondary superblocks now the physical grow has completed */
 	error = xfs_update_secondary_sbs(mp);
@@ -289,7 +285,7 @@ xfs_growfs_log(
  * exported through ioctl XFS_IOC_FSCOUNTS
  */
 
-int
+void
 xfs_fs_counts(
 	xfs_mount_t		*mp,
 	xfs_fsop_counts_t	*cnt)
@@ -302,7 +298,6 @@ xfs_fs_counts(
 	spin_lock(&mp->m_sb_lock);
 	cnt->freertx = mp->m_sb.sb_frextents;
 	spin_unlock(&mp->m_sb_lock);
-	return 0;
 }
 
 /*
@@ -533,6 +528,7 @@ xfs_fs_reserve_ag_blocks(
 	int			error = 0;
 	int			err2;
 
+	mp->m_finobt_nores = false;
 	for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
 		pag = xfs_perag_get(mp, agno);
 		err2 = xfs_ag_resv_init(pag, NULL);
diff --git a/fs/xfs/xfs_fsops.h b/fs/xfs/xfs_fsops.h
index d023db0862c2..92869f6ec8d3 100644
--- a/fs/xfs/xfs_fsops.h
+++ b/fs/xfs/xfs_fsops.h
@@ -8,7 +8,7 @@
 
 extern int xfs_growfs_data(xfs_mount_t *mp, xfs_growfs_data_t *in);
 extern int xfs_growfs_log(xfs_mount_t *mp, xfs_growfs_log_t *in);
-extern int xfs_fs_counts(xfs_mount_t *mp, xfs_fsop_counts_t *cnt);
+extern void xfs_fs_counts(xfs_mount_t *mp, xfs_fsop_counts_t *cnt);
 extern int xfs_reserve_blocks(xfs_mount_t *mp, uint64_t *inval,
 				xfs_fsop_resblks_t *outval);
 extern int xfs_fs_goingdown(xfs_mount_t *mp, uint32_t inflags);
diff --git a/fs/xfs/xfs_globals.c b/fs/xfs/xfs_globals.c
index 5169e84ae382..fa55ab8b8d80 100644
--- a/fs/xfs/xfs_globals.c
+++ b/fs/xfs/xfs_globals.c
@@ -4,7 +4,6 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
-#include "xfs_sysctl.h"
 
 /*
  * Tunable XFS parameters.  xfs_params is required even when CONFIG_SYSCTL=n,
@@ -16,7 +15,7 @@ xfs_param_t xfs_params = {
 			  /*	MIN		DFLT		MAX	*/
 	.sgid_inherit	= {	0,		0,		1	},
 	.symlink_mode	= {	0,		0,		1	},
-	.panic_mask	= {	0,		0,		255	},
+	.panic_mask	= {	0,		0,		256	},
 	.error_level	= {	0,		3,		11	},
 	.syncd_timer	= {	1*100,		30*100,		7200*100},
 	.stats_clear	= {	0,		0,		1	},
@@ -41,4 +40,7 @@ struct xfs_globals xfs_globals = {
 #else
 	.bug_on_assert		=	false,	/* assert failures WARN() */
 #endif
+#ifdef DEBUG
+	.pwork_threads		=	-1,	/* automatic thread detection */
+#endif
 };
diff --git a/fs/xfs/xfs_health.c b/fs/xfs/xfs_health.c
new file mode 100644
index 000000000000..8e0cb05a7142
--- /dev/null
+++ b/fs/xfs/xfs_health.c
@@ -0,0 +1,388 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_sb.h"
+#include "xfs_mount.h"
+#include "xfs_inode.h"
+#include "xfs_trace.h"
+#include "xfs_health.h"
+
+/*
+ * Warn about metadata corruption that we detected but haven't fixed, and
+ * make sure we're not sitting on anything that would get in the way of
+ * recovery.
+ */
+void
+xfs_health_unmount(
+	struct xfs_mount	*mp)
+{
+	struct xfs_perag	*pag;
+	xfs_agnumber_t		agno;
+	unsigned int		sick = 0;
+	unsigned int		checked = 0;
+	bool			warn = false;
+
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return;
+
+	/* Measure AG corruption levels. */
+	for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
+		pag = xfs_perag_get(mp, agno);
+		xfs_ag_measure_sickness(pag, &sick, &checked);
+		if (sick) {
+			trace_xfs_ag_unfixed_corruption(mp, agno, sick);
+			warn = true;
+		}
+		xfs_perag_put(pag);
+	}
+
+	/* Measure realtime volume corruption levels. */
+	xfs_rt_measure_sickness(mp, &sick, &checked);
+	if (sick) {
+		trace_xfs_rt_unfixed_corruption(mp, sick);
+		warn = true;
+	}
+
+	/*
+	 * Measure fs corruption and keep the sample around for the warning.
+	 * See the note below for why we exempt FS_COUNTERS.
+	 */
+	xfs_fs_measure_sickness(mp, &sick, &checked);
+	if (sick & ~XFS_SICK_FS_COUNTERS) {
+		trace_xfs_fs_unfixed_corruption(mp, sick);
+		warn = true;
+	}
+
+	if (warn) {
+		xfs_warn(mp,
+"Uncorrected metadata errors detected; please run xfs_repair.");
+
+		/*
+		 * We discovered uncorrected metadata problems at some point
+		 * during this filesystem mount and have advised the
+		 * administrator to run repair once the unmount completes.
+		 *
+		 * However, we must be careful -- when FSCOUNTERS are flagged
+		 * unhealthy, the unmount procedure omits writing the clean
+		 * unmount record to the log so that the next mount will run
+		 * recovery and recompute the summary counters.  In other
+		 * words, we leave a dirty log to get the counters fixed.
+		 *
+		 * Unfortunately, xfs_repair cannot recover dirty logs, so if
+		 * there were filesystem problems, FSCOUNTERS was flagged, and
+		 * the administrator takes our advice to run xfs_repair,
+		 * they'll have to zap the log before repairing structures.
+		 * We don't really want to encourage this, so we mark the
+		 * FSCOUNTERS healthy so that a subsequent repair run won't see
+		 * a dirty log.
+		 */
+		if (sick & XFS_SICK_FS_COUNTERS)
+			xfs_fs_mark_healthy(mp, XFS_SICK_FS_COUNTERS);
+	}
+}
+
+/* Mark unhealthy per-fs metadata. */
+void
+xfs_fs_mark_sick(
+	struct xfs_mount	*mp,
+	unsigned int		mask)
+{
+	ASSERT(!(mask & ~XFS_SICK_FS_PRIMARY));
+	trace_xfs_fs_mark_sick(mp, mask);
+
+	spin_lock(&mp->m_sb_lock);
+	mp->m_fs_sick |= mask;
+	mp->m_fs_checked |= mask;
+	spin_unlock(&mp->m_sb_lock);
+}
+
+/* Mark a per-fs metadata healed. */
+void
+xfs_fs_mark_healthy(
+	struct xfs_mount	*mp,
+	unsigned int		mask)
+{
+	ASSERT(!(mask & ~XFS_SICK_FS_PRIMARY));
+	trace_xfs_fs_mark_healthy(mp, mask);
+
+	spin_lock(&mp->m_sb_lock);
+	mp->m_fs_sick &= ~mask;
+	mp->m_fs_checked |= mask;
+	spin_unlock(&mp->m_sb_lock);
+}
+
+/* Sample which per-fs metadata are unhealthy. */
+void
+xfs_fs_measure_sickness(
+	struct xfs_mount	*mp,
+	unsigned int		*sick,
+	unsigned int		*checked)
+{
+	spin_lock(&mp->m_sb_lock);
+	*sick = mp->m_fs_sick;
+	*checked = mp->m_fs_checked;
+	spin_unlock(&mp->m_sb_lock);
+}
+
+/* Mark unhealthy realtime metadata. */
+void
+xfs_rt_mark_sick(
+	struct xfs_mount	*mp,
+	unsigned int		mask)
+{
+	ASSERT(!(mask & ~XFS_SICK_RT_PRIMARY));
+	trace_xfs_rt_mark_sick(mp, mask);
+
+	spin_lock(&mp->m_sb_lock);
+	mp->m_rt_sick |= mask;
+	mp->m_rt_checked |= mask;
+	spin_unlock(&mp->m_sb_lock);
+}
+
+/* Mark a realtime metadata healed. */
+void
+xfs_rt_mark_healthy(
+	struct xfs_mount	*mp,
+	unsigned int		mask)
+{
+	ASSERT(!(mask & ~XFS_SICK_RT_PRIMARY));
+	trace_xfs_rt_mark_healthy(mp, mask);
+
+	spin_lock(&mp->m_sb_lock);
+	mp->m_rt_sick &= ~mask;
+	mp->m_rt_checked |= mask;
+	spin_unlock(&mp->m_sb_lock);
+}
+
+/* Sample which realtime metadata are unhealthy. */
+void
+xfs_rt_measure_sickness(
+	struct xfs_mount	*mp,
+	unsigned int		*sick,
+	unsigned int		*checked)
+{
+	spin_lock(&mp->m_sb_lock);
+	*sick = mp->m_rt_sick;
+	*checked = mp->m_rt_checked;
+	spin_unlock(&mp->m_sb_lock);
+}
+
+/* Mark unhealthy per-ag metadata. */
+void
+xfs_ag_mark_sick(
+	struct xfs_perag	*pag,
+	unsigned int		mask)
+{
+	ASSERT(!(mask & ~XFS_SICK_AG_PRIMARY));
+	trace_xfs_ag_mark_sick(pag->pag_mount, pag->pag_agno, mask);
+
+	spin_lock(&pag->pag_state_lock);
+	pag->pag_sick |= mask;
+	pag->pag_checked |= mask;
+	spin_unlock(&pag->pag_state_lock);
+}
+
+/* Mark per-ag metadata ok. */
+void
+xfs_ag_mark_healthy(
+	struct xfs_perag	*pag,
+	unsigned int		mask)
+{
+	ASSERT(!(mask & ~XFS_SICK_AG_PRIMARY));
+	trace_xfs_ag_mark_healthy(pag->pag_mount, pag->pag_agno, mask);
+
+	spin_lock(&pag->pag_state_lock);
+	pag->pag_sick &= ~mask;
+	pag->pag_checked |= mask;
+	spin_unlock(&pag->pag_state_lock);
+}
+
+/* Sample which per-ag metadata are unhealthy. */
+void
+xfs_ag_measure_sickness(
+	struct xfs_perag	*pag,
+	unsigned int		*sick,
+	unsigned int		*checked)
+{
+	spin_lock(&pag->pag_state_lock);
+	*sick = pag->pag_sick;
+	*checked = pag->pag_checked;
+	spin_unlock(&pag->pag_state_lock);
+}
+
+/* Mark the unhealthy parts of an inode. */
+void
+xfs_inode_mark_sick(
+	struct xfs_inode	*ip,
+	unsigned int		mask)
+{
+	ASSERT(!(mask & ~XFS_SICK_INO_PRIMARY));
+	trace_xfs_inode_mark_sick(ip, mask);
+
+	spin_lock(&ip->i_flags_lock);
+	ip->i_sick |= mask;
+	ip->i_checked |= mask;
+	spin_unlock(&ip->i_flags_lock);
+}
+
+/* Mark parts of an inode healed. */
+void
+xfs_inode_mark_healthy(
+	struct xfs_inode	*ip,
+	unsigned int		mask)
+{
+	ASSERT(!(mask & ~XFS_SICK_INO_PRIMARY));
+	trace_xfs_inode_mark_healthy(ip, mask);
+
+	spin_lock(&ip->i_flags_lock);
+	ip->i_sick &= ~mask;
+	ip->i_checked |= mask;
+	spin_unlock(&ip->i_flags_lock);
+}
+
+/* Sample which parts of an inode are unhealthy. */
+void
+xfs_inode_measure_sickness(
+	struct xfs_inode	*ip,
+	unsigned int		*sick,
+	unsigned int		*checked)
+{
+	spin_lock(&ip->i_flags_lock);
+	*sick = ip->i_sick;
+	*checked = ip->i_checked;
+	spin_unlock(&ip->i_flags_lock);
+}
+
+/* Mappings between internal sick masks and ioctl sick masks. */
+
+struct ioctl_sick_map {
+	unsigned int		sick_mask;
+	unsigned int		ioctl_mask;
+};
+
+static const struct ioctl_sick_map fs_map[] = {
+	{ XFS_SICK_FS_COUNTERS,	XFS_FSOP_GEOM_SICK_COUNTERS},
+	{ XFS_SICK_FS_UQUOTA,	XFS_FSOP_GEOM_SICK_UQUOTA },
+	{ XFS_SICK_FS_GQUOTA,	XFS_FSOP_GEOM_SICK_GQUOTA },
+	{ XFS_SICK_FS_PQUOTA,	XFS_FSOP_GEOM_SICK_PQUOTA },
+	{ 0, 0 },
+};
+
+static const struct ioctl_sick_map rt_map[] = {
+	{ XFS_SICK_RT_BITMAP,	XFS_FSOP_GEOM_SICK_RT_BITMAP },
+	{ XFS_SICK_RT_SUMMARY,	XFS_FSOP_GEOM_SICK_RT_SUMMARY },
+	{ 0, 0 },
+};
+
+static inline void
+xfgeo_health_tick(
+	struct xfs_fsop_geom		*geo,
+	unsigned int			sick,
+	unsigned int			checked,
+	const struct ioctl_sick_map	*m)
+{
+	if (checked & m->sick_mask)
+		geo->checked |= m->ioctl_mask;
+	if (sick & m->sick_mask)
+		geo->sick |= m->ioctl_mask;
+}
+
+/* Fill out fs geometry health info. */
+void
+xfs_fsop_geom_health(
+	struct xfs_mount		*mp,
+	struct xfs_fsop_geom		*geo)
+{
+	const struct ioctl_sick_map	*m;
+	unsigned int			sick;
+	unsigned int			checked;
+
+	geo->sick = 0;
+	geo->checked = 0;
+
+	xfs_fs_measure_sickness(mp, &sick, &checked);
+	for (m = fs_map; m->sick_mask; m++)
+		xfgeo_health_tick(geo, sick, checked, m);
+
+	xfs_rt_measure_sickness(mp, &sick, &checked);
+	for (m = rt_map; m->sick_mask; m++)
+		xfgeo_health_tick(geo, sick, checked, m);
+}
+
+static const struct ioctl_sick_map ag_map[] = {
+	{ XFS_SICK_AG_SB,	XFS_AG_GEOM_SICK_SB },
+	{ XFS_SICK_AG_AGF,	XFS_AG_GEOM_SICK_AGF },
+	{ XFS_SICK_AG_AGFL,	XFS_AG_GEOM_SICK_AGFL },
+	{ XFS_SICK_AG_AGI,	XFS_AG_GEOM_SICK_AGI },
+	{ XFS_SICK_AG_BNOBT,	XFS_AG_GEOM_SICK_BNOBT },
+	{ XFS_SICK_AG_CNTBT,	XFS_AG_GEOM_SICK_CNTBT },
+	{ XFS_SICK_AG_INOBT,	XFS_AG_GEOM_SICK_INOBT },
+	{ XFS_SICK_AG_FINOBT,	XFS_AG_GEOM_SICK_FINOBT },
+	{ XFS_SICK_AG_RMAPBT,	XFS_AG_GEOM_SICK_RMAPBT },
+	{ XFS_SICK_AG_REFCNTBT,	XFS_AG_GEOM_SICK_REFCNTBT },
+	{ 0, 0 },
+};
+
+/* Fill out ag geometry health info. */
+void
+xfs_ag_geom_health(
+	struct xfs_perag		*pag,
+	struct xfs_ag_geometry		*ageo)
+{
+	const struct ioctl_sick_map	*m;
+	unsigned int			sick;
+	unsigned int			checked;
+
+	ageo->ag_sick = 0;
+	ageo->ag_checked = 0;
+
+	xfs_ag_measure_sickness(pag, &sick, &checked);
+	for (m = ag_map; m->sick_mask; m++) {
+		if (checked & m->sick_mask)
+			ageo->ag_checked |= m->ioctl_mask;
+		if (sick & m->sick_mask)
+			ageo->ag_sick |= m->ioctl_mask;
+	}
+}
+
+static const struct ioctl_sick_map ino_map[] = {
+	{ XFS_SICK_INO_CORE,	XFS_BS_SICK_INODE },
+	{ XFS_SICK_INO_BMBTD,	XFS_BS_SICK_BMBTD },
+	{ XFS_SICK_INO_BMBTA,	XFS_BS_SICK_BMBTA },
+	{ XFS_SICK_INO_BMBTC,	XFS_BS_SICK_BMBTC },
+	{ XFS_SICK_INO_DIR,	XFS_BS_SICK_DIR },
+	{ XFS_SICK_INO_XATTR,	XFS_BS_SICK_XATTR },
+	{ XFS_SICK_INO_SYMLINK,	XFS_BS_SICK_SYMLINK },
+	{ XFS_SICK_INO_PARENT,	XFS_BS_SICK_PARENT },
+	{ 0, 0 },
+};
+
+/* Fill out bulkstat health info. */
+void
+xfs_bulkstat_health(
+	struct xfs_inode		*ip,
+	struct xfs_bulkstat		*bs)
+{
+	const struct ioctl_sick_map	*m;
+	unsigned int			sick;
+	unsigned int			checked;
+
+	bs->bs_sick = 0;
+	bs->bs_checked = 0;
+
+	xfs_inode_measure_sickness(ip, &sick, &checked);
+	for (m = ino_map; m->sick_mask; m++) {
+		if (checked & m->sick_mask)
+			bs->bs_checked |= m->ioctl_mask;
+		if (sick & m->sick_mask)
+			bs->bs_sick |= m->ioctl_mask;
+	}
+}
diff --git a/fs/xfs/xfs_icache.c b/fs/xfs/xfs_icache.c
index 245483cc282b..0b0fd10a36d4 100644
--- a/fs/xfs/xfs_icache.c
+++ b/fs/xfs/xfs_icache.c
@@ -5,13 +5,13 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
-#include "xfs_error.h"
 #include "xfs_trans.h"
 #include "xfs_trans_priv.h"
 #include "xfs_inode_item.h"
@@ -23,8 +23,6 @@
 #include "xfs_dquot.h"
 #include "xfs_reflink.h"
 
-#include <linux/kthread.h>
-#include <linux/freezer.h>
 #include <linux/iversion.h>
 
 /*
@@ -70,6 +68,11 @@ xfs_inode_alloc(
 	ip->i_flags = 0;
 	ip->i_delayed_blks = 0;
 	memset(&ip->i_d, 0, sizeof(ip->i_d));
+	ip->i_sick = 0;
+	ip->i_checked = 0;
+	INIT_WORK(&ip->i_ioend_work, xfs_end_io);
+	INIT_LIST_HEAD(&ip->i_ioend_list);
+	spin_lock_init(&ip->i_ioend_lock);
 
 	return ip;
 }
@@ -446,6 +449,8 @@ xfs_iget_cache_hit(
 		ip->i_flags |= XFS_INEW;
 		xfs_inode_clear_reclaim_tag(pag, ip->i_ino);
 		inode->i_state = I_NEW;
+		ip->i_sick = 0;
+		ip->i_checked = 0;
 
 		ASSERT(!rwsem_is_locked(&inode->i_rwsem));
 		init_rwsem(&inode->i_rwsem);
@@ -1815,7 +1820,7 @@ xfs_inode_clear_cowblocks_tag(
 
 /* Disable post-EOF and CoW block auto-reclamation. */
 void
-xfs_icache_disable_reclaim(
+xfs_stop_block_reaping(
 	struct xfs_mount	*mp)
 {
 	cancel_delayed_work_sync(&mp->m_eofblocks_work);
@@ -1824,7 +1829,7 @@ xfs_icache_disable_reclaim(
 
 /* Enable post-EOF and CoW block auto-reclamation. */
 void
-xfs_icache_enable_reclaim(
+xfs_start_block_reaping(
 	struct xfs_mount	*mp)
 {
 	xfs_queue_eofblocks(mp);
diff --git a/fs/xfs/xfs_icache.h b/fs/xfs/xfs_icache.h
index 26c0626f1f75..48f1fd2bb6ad 100644
--- a/fs/xfs/xfs_icache.h
+++ b/fs/xfs/xfs_icache.h
@@ -119,7 +119,7 @@ xfs_fs_eofblocks_from_user(
 int xfs_icache_inode_is_allocated(struct xfs_mount *mp, struct xfs_trans *tp,
 				  xfs_ino_t ino, bool *inuse);
 
-void xfs_icache_disable_reclaim(struct xfs_mount *mp);
-void xfs_icache_enable_reclaim(struct xfs_mount *mp);
+void xfs_stop_block_reaping(struct xfs_mount *mp);
+void xfs_start_block_reaping(struct xfs_mount *mp);
 
 #endif
diff --git a/fs/xfs/xfs_icreate_item.c b/fs/xfs/xfs_icreate_item.c
index 8381d34cb102..d99a0a3e5f40 100644
--- a/fs/xfs/xfs_icreate_item.c
+++ b/fs/xfs/xfs_icreate_item.c
@@ -6,14 +6,9 @@
 #include "xfs.h"
 #include "xfs_fs.h"
 #include "xfs_shared.h"
-#include "xfs_format.h"
 #include "xfs_log_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_bit.h"
-#include "xfs_mount.h"
 #include "xfs_trans.h"
 #include "xfs_trans_priv.h"
-#include "xfs_error.h"
 #include "xfs_icreate_item.h"
 #include "xfs_log.h"
 
@@ -56,80 +51,18 @@ xfs_icreate_item_format(
 			sizeof(struct xfs_icreate_log));
 }
 
-
-/* Pinning has no meaning for the create item, so just return. */
 STATIC void
-xfs_icreate_item_pin(
+xfs_icreate_item_release(
 	struct xfs_log_item	*lip)
 {
+	kmem_zone_free(xfs_icreate_zone, ICR_ITEM(lip));
 }
 
-
-/* pinning has no meaning for the create item, so just return. */
-STATIC void
-xfs_icreate_item_unpin(
-	struct xfs_log_item	*lip,
-	int			remove)
-{
-}
-
-STATIC void
-xfs_icreate_item_unlock(
-	struct xfs_log_item	*lip)
-{
-	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
-
-	if (test_bit(XFS_LI_ABORTED, &lip->li_flags))
-		kmem_zone_free(xfs_icreate_zone, icp);
-	return;
-}
-
-/*
- * Because we have ordered buffers being tracked in the AIL for the inode
- * creation, we don't need the create item after this. Hence we can free
- * the log item and return -1 to tell the caller we're done with the item.
- */
-STATIC xfs_lsn_t
-xfs_icreate_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	struct xfs_icreate_item	*icp = ICR_ITEM(lip);
-
-	kmem_zone_free(xfs_icreate_zone, icp);
-	return (xfs_lsn_t)-1;
-}
-
-/* item can never get into the AIL */
-STATIC uint
-xfs_icreate_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
-{
-	ASSERT(0);
-	return XFS_ITEM_SUCCESS;
-}
-
-/* Ordered buffers do the dependency tracking here, so this does nothing. */
-STATIC void
-xfs_icreate_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-}
-
-/*
- * This is the ops vector shared by all buf log items.
- */
 static const struct xfs_item_ops xfs_icreate_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
 	.iop_size	= xfs_icreate_item_size,
 	.iop_format	= xfs_icreate_item_format,
-	.iop_pin	= xfs_icreate_item_pin,
-	.iop_unpin	= xfs_icreate_item_unpin,
-	.iop_push	= xfs_icreate_item_push,
-	.iop_unlock	= xfs_icreate_item_unlock,
-	.iop_committed	= xfs_icreate_item_committed,
-	.iop_committing = xfs_icreate_item_committing,
+	.iop_release	= xfs_icreate_item_release,
 };
 
 
diff --git a/fs/xfs/xfs_inode.c b/fs/xfs/xfs_inode.c
index ae667ba74a1c..6467d5e1df2d 100644
--- a/fs/xfs/xfs_inode.c
+++ b/fs/xfs/xfs_inode.c
@@ -3,7 +3,6 @@
  * Copyright (c) 2000-2006 Silicon Graphics, Inc.
  * All Rights Reserved.
  */
-#include <linux/log2.h>
 #include <linux/iversion.h>
 
 #include "xfs.h"
@@ -16,10 +15,7 @@
 #include "xfs_mount.h"
 #include "xfs_defer.h"
 #include "xfs_inode.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_dir2.h"
-#include "xfs_attr_sf.h"
 #include "xfs_attr.h"
 #include "xfs_trans_space.h"
 #include "xfs_trans.h"
@@ -32,7 +28,6 @@
 #include "xfs_error.h"
 #include "xfs_quota.h"
 #include "xfs_filestream.h"
-#include "xfs_cksum.h"
 #include "xfs_trace.h"
 #include "xfs_icache.h"
 #include "xfs_symlink.h"
@@ -40,7 +35,6 @@
 #include "xfs_log.h"
 #include "xfs_bmap_btree.h"
 #include "xfs_reflink.h"
-#include "xfs_dir2_priv.h"
 
 kmem_zone_t *xfs_inode_zone;
 
@@ -441,12 +435,12 @@ xfs_lock_inumorder(int lock_mode, int subclass)
  */
 static void
 xfs_lock_inodes(
-	xfs_inode_t	**ips,
-	int		inodes,
-	uint		lock_mode)
+	struct xfs_inode	**ips,
+	int			inodes,
+	uint			lock_mode)
 {
-	int		attempts = 0, i, j, try_lock;
-	xfs_log_item_t	*lp;
+	int			attempts = 0, i, j, try_lock;
+	struct xfs_log_item	*lp;
 
 	/*
 	 * Currently supports between 2 and 5 inodes with exclusive locking.  We
@@ -485,7 +479,7 @@ again:
 		 */
 		if (!try_lock) {
 			for (j = (i - 1); j >= 0 && !try_lock; j--) {
-				lp = (xfs_log_item_t *)ips[j]->i_itemp;
+				lp = &ips[j]->i_itemp->ili_item;
 				if (lp && test_bit(XFS_LI_IN_AIL, &lp->li_flags))
 					try_lock++;
 			}
@@ -551,7 +545,7 @@ xfs_lock_two_inodes(
 	struct xfs_inode	*temp;
 	uint			mode_temp;
 	int			attempts = 0;
-	xfs_log_item_t		*lp;
+	struct xfs_log_item	*lp;
 
 	ASSERT(hweight32(ip0_mode) == 1);
 	ASSERT(hweight32(ip1_mode) == 1);
@@ -585,7 +579,7 @@ xfs_lock_two_inodes(
 	 * the second lock. If we can't get it, we must release the first one
 	 * and try again.
 	 */
-	lp = (xfs_log_item_t *)ip0->i_itemp;
+	lp = &ip0->i_itemp->ili_item;
 	if (lp && test_bit(XFS_LI_IN_AIL, &lp->li_flags)) {
 		if (!xfs_ilock_nowait(ip1, xfs_lock_inumorder(ip1_mode, 1))) {
 			xfs_iunlock(ip0, ip0_mode);
@@ -1116,7 +1110,7 @@ xfs_droplink(
 /*
  * Increment the link count on an inode & log the change.
  */
-static int
+static void
 xfs_bumplink(
 	xfs_trans_t *tp,
 	xfs_inode_t *ip)
@@ -1126,7 +1120,6 @@ xfs_bumplink(
 	ASSERT(ip->i_d.di_version > 1);
 	inc_nlink(VFS_I(ip));
 	xfs_trans_log_inode(tp, ip, XFS_ILOG_CORE);
-	return 0;
 }
 
 int
@@ -1235,9 +1228,7 @@ xfs_create(
 		if (error)
 			goto out_trans_cancel;
 
-		error = xfs_bumplink(tp, dp);
-		if (error)
-			goto out_trans_cancel;
+		xfs_bumplink(tp, dp);
 	}
 
 	/*
@@ -1332,7 +1323,7 @@ xfs_create_tmpfile(
 	if (error)
 		goto out_trans_cancel;
 
-	error = xfs_dir_ialloc(&tp, dp, mode, 1, 0, prid, &ip);
+	error = xfs_dir_ialloc(&tp, dp, mode, 0, 0, prid, &ip);
 	if (error)
 		goto out_trans_cancel;
 
@@ -1454,9 +1445,7 @@ xfs_link(
 	xfs_trans_ichgtime(tp, tdp, XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
 	xfs_trans_log_inode(tp, tdp, XFS_ILOG_CORE);
 
-	error = xfs_bumplink(tp, sip);
-	if (error)
-		goto error_return;
+	xfs_bumplink(tp, sip);
 
 	/*
 	 * If this is a synchronous mount, make sure that the
@@ -1754,7 +1743,7 @@ xfs_inactive_ifree(
 	 * now remains allocated and sits on the unlinked list until the fs is
 	 * repaired.
 	 */
-	if (unlikely(mp->m_inotbt_nores)) {
+	if (unlikely(mp->m_finobt_nores)) {
 		error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ifree,
 				XFS_IFREE_SPACE_RES(mp), 0, XFS_TRANS_RESERVE,
 				&tp);
@@ -1907,86 +1896,510 @@ xfs_inactive(
 }
 
 /*
- * This is called when the inode's link count goes to 0 or we are creating a
- * tmpfile via O_TMPFILE. In the case of a tmpfile, @ignore_linkcount will be
- * set to true as the link count is dropped to zero by the VFS after we've
- * created the file successfully, so we have to add it to the unlinked list
- * while the link count is non-zero.
+ * In-Core Unlinked List Lookups
+ * =============================
+ *
+ * Every inode is supposed to be reachable from some other piece of metadata
+ * with the exception of the root directory.  Inodes with a connection to a
+ * file descriptor but not linked from anywhere in the on-disk directory tree
+ * are collectively known as unlinked inodes, though the filesystem itself
+ * maintains links to these inodes so that on-disk metadata are consistent.
+ *
+ * XFS implements a per-AG on-disk hash table of unlinked inodes.  The AGI
+ * header contains a number of buckets that point to an inode, and each inode
+ * record has a pointer to the next inode in the hash chain.  This
+ * singly-linked list causes scaling problems in the iunlink remove function
+ * because we must walk that list to find the inode that points to the inode
+ * being removed from the unlinked hash bucket list.
+ *
+ * What if we modelled the unlinked list as a collection of records capturing
+ * "X.next_unlinked = Y" relations?  If we indexed those records on Y, we'd
+ * have a fast way to look up unlinked list predecessors, which avoids the
+ * slow list walk.  That's exactly what we do here (in-core) with a per-AG
+ * rhashtable.
+ *
+ * Because this is a backref cache, we ignore operational failures since the
+ * iunlink code can fall back to the slow bucket walk.  The only errors that
+ * should bubble out are for obviously incorrect situations.
+ *
+ * All users of the backref cache MUST hold the AGI buffer lock to serialize
+ * access or have otherwise provided for concurrency control.
+ */
+
+/* Capture a "X.next_unlinked = Y" relationship. */
+struct xfs_iunlink {
+	struct rhash_head	iu_rhash_head;
+	xfs_agino_t		iu_agino;		/* X */
+	xfs_agino_t		iu_next_unlinked;	/* Y */
+};
+
+/* Unlinked list predecessor lookup hashtable construction */
+static int
+xfs_iunlink_obj_cmpfn(
+	struct rhashtable_compare_arg	*arg,
+	const void			*obj)
+{
+	const xfs_agino_t		*key = arg->key;
+	const struct xfs_iunlink	*iu = obj;
+
+	if (iu->iu_next_unlinked != *key)
+		return 1;
+	return 0;
+}
+
+static const struct rhashtable_params xfs_iunlink_hash_params = {
+	.min_size		= XFS_AGI_UNLINKED_BUCKETS,
+	.key_len		= sizeof(xfs_agino_t),
+	.key_offset		= offsetof(struct xfs_iunlink,
+					   iu_next_unlinked),
+	.head_offset		= offsetof(struct xfs_iunlink, iu_rhash_head),
+	.automatic_shrinking	= true,
+	.obj_cmpfn		= xfs_iunlink_obj_cmpfn,
+};
+
+/*
+ * Return X, where X.next_unlinked == @agino.  Returns NULLAGINO if no such
+ * relation is found.
+ */
+static xfs_agino_t
+xfs_iunlink_lookup_backref(
+	struct xfs_perag	*pag,
+	xfs_agino_t		agino)
+{
+	struct xfs_iunlink	*iu;
+
+	iu = rhashtable_lookup_fast(&pag->pagi_unlinked_hash, &agino,
+			xfs_iunlink_hash_params);
+	return iu ? iu->iu_agino : NULLAGINO;
+}
+
+/*
+ * Take ownership of an iunlink cache entry and insert it into the hash table.
+ * If successful, the entry will be owned by the cache; if not, it is freed.
+ * Either way, the caller does not own @iu after this call.
+ */
+static int
+xfs_iunlink_insert_backref(
+	struct xfs_perag	*pag,
+	struct xfs_iunlink	*iu)
+{
+	int			error;
+
+	error = rhashtable_insert_fast(&pag->pagi_unlinked_hash,
+			&iu->iu_rhash_head, xfs_iunlink_hash_params);
+	/*
+	 * Fail loudly if there already was an entry because that's a sign of
+	 * corruption of in-memory data.  Also fail loudly if we see an error
+	 * code we didn't anticipate from the rhashtable code.  Currently we
+	 * only anticipate ENOMEM.
+	 */
+	if (error) {
+		WARN(error != -ENOMEM, "iunlink cache insert error %d", error);
+		kmem_free(iu);
+	}
+	/*
+	 * Absorb any runtime errors that aren't a result of corruption because
+	 * this is a cache and we can always fall back to bucket list scanning.
+	 */
+	if (error != 0 && error != -EEXIST)
+		error = 0;
+	return error;
+}
+
+/* Remember that @prev_agino.next_unlinked = @this_agino. */
+static int
+xfs_iunlink_add_backref(
+	struct xfs_perag	*pag,
+	xfs_agino_t		prev_agino,
+	xfs_agino_t		this_agino)
+{
+	struct xfs_iunlink	*iu;
+
+	if (XFS_TEST_ERROR(false, pag->pag_mount, XFS_ERRTAG_IUNLINK_FALLBACK))
+		return 0;
+
+	iu = kmem_zalloc(sizeof(*iu), KM_SLEEP | KM_NOFS);
+	iu->iu_agino = prev_agino;
+	iu->iu_next_unlinked = this_agino;
+
+	return xfs_iunlink_insert_backref(pag, iu);
+}
+
+/*
+ * Replace X.next_unlinked = @agino with X.next_unlinked = @next_unlinked.
+ * If @next_unlinked is NULLAGINO, we drop the backref and exit.  If there
+ * wasn't any such entry then we don't bother.
+ */
+static int
+xfs_iunlink_change_backref(
+	struct xfs_perag	*pag,
+	xfs_agino_t		agino,
+	xfs_agino_t		next_unlinked)
+{
+	struct xfs_iunlink	*iu;
+	int			error;
+
+	/* Look up the old entry; if there wasn't one then exit. */
+	iu = rhashtable_lookup_fast(&pag->pagi_unlinked_hash, &agino,
+			xfs_iunlink_hash_params);
+	if (!iu)
+		return 0;
+
+	/*
+	 * Remove the entry.  This shouldn't ever return an error, but if we
+	 * couldn't remove the old entry we don't want to add it again to the
+	 * hash table, and if the entry disappeared on us then someone's
+	 * violated the locking rules and we need to fail loudly.  Either way
+	 * we cannot remove the inode because internal state is or would have
+	 * been corrupt.
+	 */
+	error = rhashtable_remove_fast(&pag->pagi_unlinked_hash,
+			&iu->iu_rhash_head, xfs_iunlink_hash_params);
+	if (error)
+		return error;
+
+	/* If there is no new next entry just free our item and return. */
+	if (next_unlinked == NULLAGINO) {
+		kmem_free(iu);
+		return 0;
+	}
+
+	/* Update the entry and re-add it to the hash table. */
+	iu->iu_next_unlinked = next_unlinked;
+	return xfs_iunlink_insert_backref(pag, iu);
+}
+
+/* Set up the in-core predecessor structures. */
+int
+xfs_iunlink_init(
+	struct xfs_perag	*pag)
+{
+	return rhashtable_init(&pag->pagi_unlinked_hash,
+			&xfs_iunlink_hash_params);
+}
+
+/* Free the in-core predecessor structures. */
+static void
+xfs_iunlink_free_item(
+	void			*ptr,
+	void			*arg)
+{
+	struct xfs_iunlink	*iu = ptr;
+	bool			*freed_anything = arg;
+
+	*freed_anything = true;
+	kmem_free(iu);
+}
+
+void
+xfs_iunlink_destroy(
+	struct xfs_perag	*pag)
+{
+	bool			freed_anything = false;
+
+	rhashtable_free_and_destroy(&pag->pagi_unlinked_hash,
+			xfs_iunlink_free_item, &freed_anything);
+
+	ASSERT(freed_anything == false || XFS_FORCED_SHUTDOWN(pag->pag_mount));
+}
+
+/*
+ * Point the AGI unlinked bucket at an inode and log the results.  The caller
+ * is responsible for validating the old value.
+ */
+STATIC int
+xfs_iunlink_update_bucket(
+	struct xfs_trans	*tp,
+	xfs_agnumber_t		agno,
+	struct xfs_buf		*agibp,
+	unsigned int		bucket_index,
+	xfs_agino_t		new_agino)
+{
+	struct xfs_agi		*agi = XFS_BUF_TO_AGI(agibp);
+	xfs_agino_t		old_value;
+	int			offset;
+
+	ASSERT(xfs_verify_agino_or_null(tp->t_mountp, agno, new_agino));
+
+	old_value = be32_to_cpu(agi->agi_unlinked[bucket_index]);
+	trace_xfs_iunlink_update_bucket(tp->t_mountp, agno, bucket_index,
+			old_value, new_agino);
+
+	/*
+	 * We should never find the head of the list already set to the value
+	 * passed in because either we're adding or removing ourselves from the
+	 * head of the list.
+	 */
+	if (old_value == new_agino)
+		return -EFSCORRUPTED;
+
+	agi->agi_unlinked[bucket_index] = cpu_to_be32(new_agino);
+	offset = offsetof(struct xfs_agi, agi_unlinked) +
+			(sizeof(xfs_agino_t) * bucket_index);
+	xfs_trans_log_buf(tp, agibp, offset, offset + sizeof(xfs_agino_t) - 1);
+	return 0;
+}
+
+/* Set an on-disk inode's next_unlinked pointer. */
+STATIC void
+xfs_iunlink_update_dinode(
+	struct xfs_trans	*tp,
+	xfs_agnumber_t		agno,
+	xfs_agino_t		agino,
+	struct xfs_buf		*ibp,
+	struct xfs_dinode	*dip,
+	struct xfs_imap		*imap,
+	xfs_agino_t		next_agino)
+{
+	struct xfs_mount	*mp = tp->t_mountp;
+	int			offset;
+
+	ASSERT(xfs_verify_agino_or_null(mp, agno, next_agino));
+
+	trace_xfs_iunlink_update_dinode(mp, agno, agino,
+			be32_to_cpu(dip->di_next_unlinked), next_agino);
+
+	dip->di_next_unlinked = cpu_to_be32(next_agino);
+	offset = imap->im_boffset +
+			offsetof(struct xfs_dinode, di_next_unlinked);
+
+	/* need to recalc the inode CRC if appropriate */
+	xfs_dinode_calc_crc(mp, dip);
+	xfs_trans_inode_buf(tp, ibp);
+	xfs_trans_log_buf(tp, ibp, offset, offset + sizeof(xfs_agino_t) - 1);
+	xfs_inobp_check(mp, ibp);
+}
+
+/* Set an in-core inode's unlinked pointer and return the old value. */
+STATIC int
+xfs_iunlink_update_inode(
+	struct xfs_trans	*tp,
+	struct xfs_inode	*ip,
+	xfs_agnumber_t		agno,
+	xfs_agino_t		next_agino,
+	xfs_agino_t		*old_next_agino)
+{
+	struct xfs_mount	*mp = tp->t_mountp;
+	struct xfs_dinode	*dip;
+	struct xfs_buf		*ibp;
+	xfs_agino_t		old_value;
+	int			error;
+
+	ASSERT(xfs_verify_agino_or_null(mp, agno, next_agino));
+
+	error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp, 0, 0);
+	if (error)
+		return error;
+
+	/* Make sure the old pointer isn't garbage. */
+	old_value = be32_to_cpu(dip->di_next_unlinked);
+	if (!xfs_verify_agino_or_null(mp, agno, old_value)) {
+		error = -EFSCORRUPTED;
+		goto out;
+	}
+
+	/*
+	 * Since we're updating a linked list, we should never find that the
+	 * current pointer is the same as the new value, unless we're
+	 * terminating the list.
+	 */
+	*old_next_agino = old_value;
+	if (old_value == next_agino) {
+		if (next_agino != NULLAGINO)
+			error = -EFSCORRUPTED;
+		goto out;
+	}
+
+	/* Ok, update the new pointer. */
+	xfs_iunlink_update_dinode(tp, agno, XFS_INO_TO_AGINO(mp, ip->i_ino),
+			ibp, dip, &ip->i_imap, next_agino);
+	return 0;
+out:
+	xfs_trans_brelse(tp, ibp);
+	return error;
+}
+
+/*
+ * This is called when the inode's link count has gone to 0 or we are creating
+ * a tmpfile via O_TMPFILE.  The inode @ip must have nlink == 0.
  *
  * We place the on-disk inode on a list in the AGI.  It will be pulled from this
  * list when the inode is freed.
  */
 STATIC int
 xfs_iunlink(
-	struct xfs_trans *tp,
-	struct xfs_inode *ip)
+	struct xfs_trans	*tp,
+	struct xfs_inode	*ip)
 {
-	xfs_mount_t	*mp = tp->t_mountp;
-	xfs_agi_t	*agi;
-	xfs_dinode_t	*dip;
-	xfs_buf_t	*agibp;
-	xfs_buf_t	*ibp;
-	xfs_agino_t	agino;
-	short		bucket_index;
-	int		offset;
-	int		error;
+	struct xfs_mount	*mp = tp->t_mountp;
+	struct xfs_agi		*agi;
+	struct xfs_buf		*agibp;
+	xfs_agino_t		next_agino;
+	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, ip->i_ino);
+	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
+	short			bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
+	int			error;
 
+	ASSERT(VFS_I(ip)->i_nlink == 0);
 	ASSERT(VFS_I(ip)->i_mode != 0);
+	trace_xfs_iunlink(ip);
 
-	/*
-	 * Get the agi buffer first.  It ensures lock ordering
-	 * on the list.
-	 */
-	error = xfs_read_agi(mp, tp, XFS_INO_TO_AGNO(mp, ip->i_ino), &agibp);
+	/* Get the agi buffer first.  It ensures lock ordering on the list. */
+	error = xfs_read_agi(mp, tp, agno, &agibp);
 	if (error)
 		return error;
 	agi = XFS_BUF_TO_AGI(agibp);
 
 	/*
-	 * Get the index into the agi hash table for the
-	 * list this inode will go on.
+	 * Get the index into the agi hash table for the list this inode will
+	 * go on.  Make sure the pointer isn't garbage and that this inode
+	 * isn't already on the list.
 	 */
-	agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
-	ASSERT(agino != 0);
-	bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
-	ASSERT(agi->agi_unlinked[bucket_index]);
-	ASSERT(be32_to_cpu(agi->agi_unlinked[bucket_index]) != agino);
+	next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]);
+	if (next_agino == agino ||
+	    !xfs_verify_agino_or_null(mp, agno, next_agino))
+		return -EFSCORRUPTED;
+
+	if (next_agino != NULLAGINO) {
+		struct xfs_perag	*pag;
+		xfs_agino_t		old_agino;
 
-	if (agi->agi_unlinked[bucket_index] != cpu_to_be32(NULLAGINO)) {
 		/*
-		 * There is already another inode in the bucket we need
-		 * to add ourselves to.  Add us at the front of the list.
-		 * Here we put the head pointer into our next pointer,
-		 * and then we fall through to point the head at us.
+		 * There is already another inode in the bucket, so point this
+		 * inode to the current head of the list.
 		 */
-		error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
-				       0, 0);
+		error = xfs_iunlink_update_inode(tp, ip, agno, next_agino,
+				&old_agino);
 		if (error)
 			return error;
+		ASSERT(old_agino == NULLAGINO);
 
-		ASSERT(dip->di_next_unlinked == cpu_to_be32(NULLAGINO));
-		dip->di_next_unlinked = agi->agi_unlinked[bucket_index];
-		offset = ip->i_imap.im_boffset +
-			offsetof(xfs_dinode_t, di_next_unlinked);
+		/*
+		 * agino has been unlinked, add a backref from the next inode
+		 * back to agino.
+		 */
+		pag = xfs_perag_get(mp, agno);
+		error = xfs_iunlink_add_backref(pag, agino, next_agino);
+		xfs_perag_put(pag);
+		if (error)
+			return error;
+	}
+
+	/* Point the head of the list to point to this inode. */
+	return xfs_iunlink_update_bucket(tp, agno, agibp, bucket_index, agino);
+}
+
+/* Return the imap, dinode pointer, and buffer for an inode. */
+STATIC int
+xfs_iunlink_map_ino(
+	struct xfs_trans	*tp,
+	xfs_agnumber_t		agno,
+	xfs_agino_t		agino,
+	struct xfs_imap		*imap,
+	struct xfs_dinode	**dipp,
+	struct xfs_buf		**bpp)
+{
+	struct xfs_mount	*mp = tp->t_mountp;
+	int			error;
 
-		/* need to recalc the inode CRC if appropriate */
-		xfs_dinode_calc_crc(mp, dip);
+	imap->im_blkno = 0;
+	error = xfs_imap(mp, tp, XFS_AGINO_TO_INO(mp, agno, agino), imap, 0);
+	if (error) {
+		xfs_warn(mp, "%s: xfs_imap returned error %d.",
+				__func__, error);
+		return error;
+	}
 
-		xfs_trans_inode_buf(tp, ibp);
-		xfs_trans_log_buf(tp, ibp, offset,
-				  (offset + sizeof(xfs_agino_t) - 1));
-		xfs_inobp_check(mp, ibp);
+	error = xfs_imap_to_bp(mp, tp, imap, dipp, bpp, 0, 0);
+	if (error) {
+		xfs_warn(mp, "%s: xfs_imap_to_bp returned error %d.",
+				__func__, error);
+		return error;
+	}
+
+	return 0;
+}
+
+/*
+ * Walk the unlinked chain from @head_agino until we find the inode that
+ * points to @target_agino.  Return the inode number, map, dinode pointer,
+ * and inode cluster buffer of that inode as @agino, @imap, @dipp, and @bpp.
+ *
+ * @tp, @pag, @head_agino, and @target_agino are input parameters.
+ * @agino, @imap, @dipp, and @bpp are all output parameters.
+ *
+ * Do not call this function if @target_agino is the head of the list.
+ */
+STATIC int
+xfs_iunlink_map_prev(
+	struct xfs_trans	*tp,
+	xfs_agnumber_t		agno,
+	xfs_agino_t		head_agino,
+	xfs_agino_t		target_agino,
+	xfs_agino_t		*agino,
+	struct xfs_imap		*imap,
+	struct xfs_dinode	**dipp,
+	struct xfs_buf		**bpp,
+	struct xfs_perag	*pag)
+{
+	struct xfs_mount	*mp = tp->t_mountp;
+	xfs_agino_t		next_agino;
+	int			error;
+
+	ASSERT(head_agino != target_agino);
+	*bpp = NULL;
+
+	/* See if our backref cache can find it faster. */
+	*agino = xfs_iunlink_lookup_backref(pag, target_agino);
+	if (*agino != NULLAGINO) {
+		error = xfs_iunlink_map_ino(tp, agno, *agino, imap, dipp, bpp);
+		if (error)
+			return error;
+
+		if (be32_to_cpu((*dipp)->di_next_unlinked) == target_agino)
+			return 0;
+
+		/*
+		 * If we get here the cache contents were corrupt, so drop the
+		 * buffer and fall back to walking the bucket list.
+		 */
+		xfs_trans_brelse(tp, *bpp);
+		*bpp = NULL;
+		WARN_ON_ONCE(1);
+	}
+
+	trace_xfs_iunlink_map_prev_fallback(mp, agno);
+
+	/* Otherwise, walk the entire bucket until we find it. */
+	next_agino = head_agino;
+	while (next_agino != target_agino) {
+		xfs_agino_t	unlinked_agino;
+
+		if (*bpp)
+			xfs_trans_brelse(tp, *bpp);
+
+		*agino = next_agino;
+		error = xfs_iunlink_map_ino(tp, agno, next_agino, imap, dipp,
+				bpp);
+		if (error)
+			return error;
+
+		unlinked_agino = be32_to_cpu((*dipp)->di_next_unlinked);
+		/*
+		 * Make sure this pointer is valid and isn't an obvious
+		 * infinite loop.
+		 */
+		if (!xfs_verify_agino(mp, agno, unlinked_agino) ||
+		    next_agino == unlinked_agino) {
+			XFS_CORRUPTION_ERROR(__func__,
+					XFS_ERRLEVEL_LOW, mp,
+					*dipp, sizeof(**dipp));
+			error = -EFSCORRUPTED;
+			return error;
+		}
+		next_agino = unlinked_agino;
 	}
 
-	/*
-	 * Point the bucket head pointer at the inode being inserted.
-	 */
-	ASSERT(agino != 0);
-	agi->agi_unlinked[bucket_index] = cpu_to_be32(agino);
-	offset = offsetof(xfs_agi_t, agi_unlinked) +
-		(sizeof(xfs_agino_t) * bucket_index);
-	xfs_trans_log_buf(tp, agibp, offset,
-			  (offset + sizeof(xfs_agino_t) - 1));
 	return 0;
 }
 
@@ -1995,181 +2408,106 @@ xfs_iunlink(
  */
 STATIC int
 xfs_iunlink_remove(
-	xfs_trans_t	*tp,
-	xfs_inode_t	*ip)
+	struct xfs_trans	*tp,
+	struct xfs_inode	*ip)
 {
-	xfs_ino_t	next_ino;
-	xfs_mount_t	*mp;
-	xfs_agi_t	*agi;
-	xfs_dinode_t	*dip;
-	xfs_buf_t	*agibp;
-	xfs_buf_t	*ibp;
-	xfs_agnumber_t	agno;
-	xfs_agino_t	agino;
-	xfs_agino_t	next_agino;
-	xfs_buf_t	*last_ibp;
-	xfs_dinode_t	*last_dip = NULL;
-	short		bucket_index;
-	int		offset, last_offset = 0;
-	int		error;
+	struct xfs_mount	*mp = tp->t_mountp;
+	struct xfs_agi		*agi;
+	struct xfs_buf		*agibp;
+	struct xfs_buf		*last_ibp;
+	struct xfs_dinode	*last_dip = NULL;
+	struct xfs_perag	*pag = NULL;
+	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, ip->i_ino);
+	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
+	xfs_agino_t		next_agino;
+	xfs_agino_t		head_agino;
+	short			bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
+	int			error;
 
-	mp = tp->t_mountp;
-	agno = XFS_INO_TO_AGNO(mp, ip->i_ino);
+	trace_xfs_iunlink_remove(ip);
 
-	/*
-	 * Get the agi buffer first.  It ensures lock ordering
-	 * on the list.
-	 */
+	/* Get the agi buffer first.  It ensures lock ordering on the list. */
 	error = xfs_read_agi(mp, tp, agno, &agibp);
 	if (error)
 		return error;
-
 	agi = XFS_BUF_TO_AGI(agibp);
 
 	/*
-	 * Get the index into the agi hash table for the
-	 * list this inode will go on.
+	 * Get the index into the agi hash table for the list this inode will
+	 * go on.  Make sure the head pointer isn't garbage.
 	 */
-	agino = XFS_INO_TO_AGINO(mp, ip->i_ino);
-	if (!xfs_verify_agino(mp, agno, agino))
-		return -EFSCORRUPTED;
-	bucket_index = agino % XFS_AGI_UNLINKED_BUCKETS;
-	if (!xfs_verify_agino(mp, agno,
-			be32_to_cpu(agi->agi_unlinked[bucket_index]))) {
+	head_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]);
+	if (!xfs_verify_agino(mp, agno, head_agino)) {
 		XFS_CORRUPTION_ERROR(__func__, XFS_ERRLEVEL_LOW, mp,
 				agi, sizeof(*agi));
 		return -EFSCORRUPTED;
 	}
 
-	if (be32_to_cpu(agi->agi_unlinked[bucket_index]) == agino) {
-		/*
-		 * We're at the head of the list.  Get the inode's on-disk
-		 * buffer to see if there is anyone after us on the list.
-		 * Only modify our next pointer if it is not already NULLAGINO.
-		 * This saves us the overhead of dealing with the buffer when
-		 * there is no need to change it.
-		 */
-		error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
-				       0, 0);
-		if (error) {
-			xfs_warn(mp, "%s: xfs_imap_to_bp returned error %d.",
-				__func__, error);
-			return error;
-		}
-		next_agino = be32_to_cpu(dip->di_next_unlinked);
-		ASSERT(next_agino != 0);
-		if (next_agino != NULLAGINO) {
-			dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
-			offset = ip->i_imap.im_boffset +
-				offsetof(xfs_dinode_t, di_next_unlinked);
-
-			/* need to recalc the inode CRC if appropriate */
-			xfs_dinode_calc_crc(mp, dip);
-
-			xfs_trans_inode_buf(tp, ibp);
-			xfs_trans_log_buf(tp, ibp, offset,
-					  (offset + sizeof(xfs_agino_t) - 1));
-			xfs_inobp_check(mp, ibp);
-		} else {
-			xfs_trans_brelse(tp, ibp);
-		}
-		/*
-		 * Point the bucket head pointer at the next inode.
-		 */
-		ASSERT(next_agino != 0);
-		ASSERT(next_agino != agino);
-		agi->agi_unlinked[bucket_index] = cpu_to_be32(next_agino);
-		offset = offsetof(xfs_agi_t, agi_unlinked) +
-			(sizeof(xfs_agino_t) * bucket_index);
-		xfs_trans_log_buf(tp, agibp, offset,
-				  (offset + sizeof(xfs_agino_t) - 1));
-	} else {
-		/*
-		 * We need to search the list for the inode being freed.
-		 */
-		next_agino = be32_to_cpu(agi->agi_unlinked[bucket_index]);
-		last_ibp = NULL;
-		while (next_agino != agino) {
-			struct xfs_imap	imap;
+	/*
+	 * Set our inode's next_unlinked pointer to NULL and then return
+	 * the old pointer value so that we can update whatever was previous
+	 * to us in the list to point to whatever was next in the list.
+	 */
+	error = xfs_iunlink_update_inode(tp, ip, agno, NULLAGINO, &next_agino);
+	if (error)
+		return error;
 
-			if (last_ibp)
-				xfs_trans_brelse(tp, last_ibp);
+	/*
+	 * If there was a backref pointing from the next inode back to this
+	 * one, remove it because we've removed this inode from the list.
+	 *
+	 * Later, if this inode was in the middle of the list we'll update
+	 * this inode's backref to point from the next inode.
+	 */
+	if (next_agino != NULLAGINO) {
+		pag = xfs_perag_get(mp, agno);
+		error = xfs_iunlink_change_backref(pag, next_agino,
+				NULLAGINO);
+		if (error)
+			goto out;
+	}
 
-			imap.im_blkno = 0;
-			next_ino = XFS_AGINO_TO_INO(mp, agno, next_agino);
+	if (head_agino == agino) {
+		/* Point the head of the list to the next unlinked inode. */
+		error = xfs_iunlink_update_bucket(tp, agno, agibp, bucket_index,
+				next_agino);
+		if (error)
+			goto out;
+	} else {
+		struct xfs_imap	imap;
+		xfs_agino_t	prev_agino;
 
-			error = xfs_imap(mp, tp, next_ino, &imap, 0);
-			if (error) {
-				xfs_warn(mp,
-	"%s: xfs_imap returned error %d.",
-					 __func__, error);
-				return error;
-			}
+		if (!pag)
+			pag = xfs_perag_get(mp, agno);
 
-			error = xfs_imap_to_bp(mp, tp, &imap, &last_dip,
-					       &last_ibp, 0, 0);
-			if (error) {
-				xfs_warn(mp,
-	"%s: xfs_imap_to_bp returned error %d.",
-					__func__, error);
-				return error;
-			}
+		/* We need to search the list for the inode being freed. */
+		error = xfs_iunlink_map_prev(tp, agno, head_agino, agino,
+				&prev_agino, &imap, &last_dip, &last_ibp,
+				pag);
+		if (error)
+			goto out;
 
-			last_offset = imap.im_boffset;
-			next_agino = be32_to_cpu(last_dip->di_next_unlinked);
-			if (!xfs_verify_agino(mp, agno, next_agino)) {
-				XFS_CORRUPTION_ERROR(__func__,
-						XFS_ERRLEVEL_LOW, mp,
-						last_dip, sizeof(*last_dip));
-				return -EFSCORRUPTED;
-			}
-		}
+		/* Point the previous inode on the list to the next inode. */
+		xfs_iunlink_update_dinode(tp, agno, prev_agino, last_ibp,
+				last_dip, &imap, next_agino);
 
 		/*
-		 * Now last_ibp points to the buffer previous to us on the
-		 * unlinked list.  Pull us from the list.
+		 * Now we deal with the backref for this inode.  If this inode
+		 * pointed at a real inode, change the backref that pointed to
+		 * us to point to our old next.  If this inode was the end of
+		 * the list, delete the backref that pointed to us.  Note that
+		 * change_backref takes care of deleting the backref if
+		 * next_agino is NULLAGINO.
 		 */
-		error = xfs_imap_to_bp(mp, tp, &ip->i_imap, &dip, &ibp,
-				       0, 0);
-		if (error) {
-			xfs_warn(mp, "%s: xfs_imap_to_bp(2) returned error %d.",
-				__func__, error);
-			return error;
-		}
-		next_agino = be32_to_cpu(dip->di_next_unlinked);
-		ASSERT(next_agino != 0);
-		ASSERT(next_agino != agino);
-		if (next_agino != NULLAGINO) {
-			dip->di_next_unlinked = cpu_to_be32(NULLAGINO);
-			offset = ip->i_imap.im_boffset +
-				offsetof(xfs_dinode_t, di_next_unlinked);
-
-			/* need to recalc the inode CRC if appropriate */
-			xfs_dinode_calc_crc(mp, dip);
-
-			xfs_trans_inode_buf(tp, ibp);
-			xfs_trans_log_buf(tp, ibp, offset,
-					  (offset + sizeof(xfs_agino_t) - 1));
-			xfs_inobp_check(mp, ibp);
-		} else {
-			xfs_trans_brelse(tp, ibp);
-		}
-		/*
-		 * Point the previous inode on the list to the next inode.
-		 */
-		last_dip->di_next_unlinked = cpu_to_be32(next_agino);
-		ASSERT(next_agino != 0);
-		offset = last_offset + offsetof(xfs_dinode_t, di_next_unlinked);
-
-		/* need to recalc the inode CRC if appropriate */
-		xfs_dinode_calc_crc(mp, last_dip);
-
-		xfs_trans_inode_buf(tp, last_ibp);
-		xfs_trans_log_buf(tp, last_ibp, offset,
-				  (offset + sizeof(xfs_agino_t) - 1));
-		xfs_inobp_check(mp, last_ibp);
+		error = xfs_iunlink_change_backref(pag, agino, next_agino);
+		if (error)
+			goto out;
 	}
-	return 0;
+
+out:
+	if (pag)
+		xfs_perag_put(pag);
+	return error;
 }
 
 /*
@@ -2193,13 +2531,14 @@ xfs_ifree_cluster(
 	xfs_inode_log_item_t	*iip;
 	struct xfs_log_item	*lip;
 	struct xfs_perag	*pag;
+	struct xfs_ino_geometry	*igeo = M_IGEO(mp);
 	xfs_ino_t		inum;
 
 	inum = xic->first_ino;
 	pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, inum));
-	nbufs = mp->m_ialloc_blks / mp->m_blocks_per_cluster;
+	nbufs = igeo->ialloc_blks / igeo->blocks_per_cluster;
 
-	for (j = 0; j < nbufs; j++, inum += mp->m_inodes_per_cluster) {
+	for (j = 0; j < nbufs; j++, inum += igeo->inodes_per_cluster) {
 		/*
 		 * The allocation bitmap tells us which inodes of the chunk were
 		 * physically allocated. Skip the cluster if an inode falls into
@@ -2207,7 +2546,7 @@ xfs_ifree_cluster(
 		 */
 		ioffset = inum - xic->first_ino;
 		if ((xic->alloc & XFS_INOBT_MASK(ioffset)) == 0) {
-			ASSERT(ioffset % mp->m_inodes_per_cluster == 0);
+			ASSERT(ioffset % igeo->inodes_per_cluster == 0);
 			continue;
 		}
 
@@ -2223,7 +2562,7 @@ xfs_ifree_cluster(
 		 * to mark all the active inodes on the buffer stale.
 		 */
 		bp = xfs_trans_get_buf(tp, mp->m_ddev_targp, blkno,
-					mp->m_bsize * mp->m_blocks_per_cluster,
+					mp->m_bsize * igeo->blocks_per_cluster,
 					XBF_UNMAPPED);
 
 		if (!bp)
@@ -2270,7 +2609,7 @@ xfs_ifree_cluster(
 		 * transaction stale above, which means there is no point in
 		 * even trying to lock them.
 		 */
-		for (i = 0; i < mp->m_inodes_per_cluster; i++) {
+		for (i = 0; i < igeo->inodes_per_cluster; i++) {
 retry:
 			rcu_read_lock();
 			ip = radix_tree_lookup(&pag->pag_ici_root,
@@ -2748,9 +3087,7 @@ xfs_cross_rename(
 				error = xfs_droplink(tp, dp2);
 				if (error)
 					goto out_trans_abort;
-				error = xfs_bumplink(tp, dp1);
-				if (error)
-					goto out_trans_abort;
+				xfs_bumplink(tp, dp1);
 			}
 
 			/*
@@ -2774,9 +3111,7 @@ xfs_cross_rename(
 				error = xfs_droplink(tp, dp1);
 				if (error)
 					goto out_trans_abort;
-				error = xfs_bumplink(tp, dp2);
-				if (error)
-					goto out_trans_abort;
+				xfs_bumplink(tp, dp2);
 			}
 
 			/*
@@ -2833,11 +3168,9 @@ xfs_rename_alloc_whiteout(
 
 	/*
 	 * Prepare the tmpfile inode as if it were created through the VFS.
-	 * Otherwise, the link increment paths will complain about nlink 0->1.
-	 * Drop the link count as done by d_tmpfile(), complete the inode setup
-	 * and flag it as linkable.
+	 * Complete the inode setup and flag it as linkable.  nlink is already
+	 * zero, so we can skip the drop_nlink.
 	 */
-	drop_nlink(VFS_I(tmpfile));
 	xfs_setup_iops(tmpfile);
 	xfs_finish_inode_setup(tmpfile);
 	VFS_I(tmpfile)->i_state |= I_LINKABLE;
@@ -2975,9 +3308,7 @@ xfs_rename(
 					XFS_ICHGTIME_MOD | XFS_ICHGTIME_CHG);
 
 		if (new_parent && src_is_directory) {
-			error = xfs_bumplink(tp, target_dp);
-			if (error)
-				goto out_trans_cancel;
+			xfs_bumplink(tp, target_dp);
 		}
 	} else { /* target_ip != NULL */
 		/*
@@ -3096,9 +3427,7 @@ xfs_rename(
 	 */
 	if (wip) {
 		ASSERT(VFS_I(wip)->i_nlink == 0);
-		error = xfs_bumplink(tp, wip);
-		if (error)
-			goto out_trans_cancel;
+		xfs_bumplink(tp, wip);
 		error = xfs_iunlink_remove(tp, wip);
 		if (error)
 			goto out_trans_cancel;
@@ -3138,28 +3467,27 @@ xfs_iflush_cluster(
 	struct xfs_mount	*mp = ip->i_mount;
 	struct xfs_perag	*pag;
 	unsigned long		first_index, mask;
-	unsigned long		inodes_per_cluster;
 	int			cilist_size;
 	struct xfs_inode	**cilist;
 	struct xfs_inode	*cip;
+	struct xfs_ino_geometry	*igeo = M_IGEO(mp);
 	int			nr_found;
 	int			clcount = 0;
 	int			i;
 
 	pag = xfs_perag_get(mp, XFS_INO_TO_AGNO(mp, ip->i_ino));
 
-	inodes_per_cluster = mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog;
-	cilist_size = inodes_per_cluster * sizeof(xfs_inode_t *);
+	cilist_size = igeo->inodes_per_cluster * sizeof(struct xfs_inode *);
 	cilist = kmem_alloc(cilist_size, KM_MAYFAIL|KM_NOFS);
 	if (!cilist)
 		goto out_put;
 
-	mask = ~(((mp->m_inode_cluster_size >> mp->m_sb.sb_inodelog)) - 1);
+	mask = ~(igeo->inodes_per_cluster - 1);
 	first_index = XFS_INO_TO_AGINO(mp, ip->i_ino) & mask;
 	rcu_read_lock();
 	/* really need a gang lookup range call here */
 	nr_found = radix_tree_gang_lookup(&pag->pag_ici_root, (void**)cilist,
-					first_index, inodes_per_cluster);
+					first_index, igeo->inodes_per_cluster);
 	if (nr_found == 0)
 		goto out_free;
 
@@ -3267,7 +3595,6 @@ cluster_corrupt_out:
 	 * inode buffer and shut down the filesystem.
 	 */
 	rcu_read_unlock();
-	xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
 
 	/*
 	 * We'll always have an inode attached to the buffer for completion
@@ -3277,11 +3604,14 @@ cluster_corrupt_out:
 	 * xfs_buf_submit().
 	 */
 	ASSERT(bp->b_iodone);
+	bp->b_flags |= XBF_ASYNC;
 	bp->b_flags &= ~XBF_DONE;
 	xfs_buf_stale(bp);
 	xfs_buf_ioerror(bp, -EIO);
 	xfs_buf_ioend(bp);
 
+	xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
+
 	/* abort the corrupt inode, as it was not attached to the buffer */
 	xfs_iflush_abort(cip, false);
 	kmem_free(cilist);
diff --git a/fs/xfs/xfs_inode.h b/fs/xfs/xfs_inode.h
index be2014520155..558173f95a03 100644
--- a/fs/xfs/xfs_inode.h
+++ b/fs/xfs/xfs_inode.h
@@ -45,10 +45,18 @@ typedef struct xfs_inode {
 	mrlock_t		i_lock;		/* inode lock */
 	mrlock_t		i_mmaplock;	/* inode mmap IO lock */
 	atomic_t		i_pincount;	/* inode pin count */
+
+	/*
+	 * Bitsets of inode metadata that have been checked and/or are sick.
+	 * Callers must hold i_flags_lock before accessing this field.
+	 */
+	uint16_t		i_checked;
+	uint16_t		i_sick;
+
 	spinlock_t		i_flags_lock;	/* inode i_flags lock */
 	/* Miscellaneous state. */
 	unsigned long		i_flags;	/* see defined flags below */
-	unsigned int		i_delayed_blks;	/* count of delay alloc blks */
+	uint64_t		i_delayed_blks;	/* count of delay alloc blks */
 
 	struct xfs_icdinode	i_d;		/* most of ondisk inode */
 
@@ -57,6 +65,11 @@ typedef struct xfs_inode {
 
 	/* VFS inode */
 	struct inode		i_vnode;	/* embedded VFS inode */
+
+	/* pending io completions */
+	spinlock_t		i_ioend_lock;
+	struct work_struct	i_ioend_work;
+	struct list_head	i_ioend_list;
 } xfs_inode_t;
 
 /* Convert from vfs inode to xfs inode */
@@ -500,4 +513,9 @@ extern struct kmem_zone	*xfs_inode_zone;
 
 bool xfs_inode_verify_forks(struct xfs_inode *ip);
 
+int xfs_iunlink_init(struct xfs_perag *pag);
+void xfs_iunlink_destroy(struct xfs_perag *pag);
+
+void xfs_end_io(struct work_struct *work);
+
 #endif	/* __XFS_INODE_H__ */
diff --git a/fs/xfs/xfs_inode_item.c b/fs/xfs/xfs_inode_item.c
index fa1c4fe2ffbf..c9a502eed204 100644
--- a/fs/xfs/xfs_inode_item.c
+++ b/fs/xfs/xfs_inode_item.c
@@ -5,6 +5,7 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
@@ -12,7 +13,6 @@
 #include "xfs_inode.h"
 #include "xfs_trans.h"
 #include "xfs_inode_item.h"
-#include "xfs_error.h"
 #include "xfs_trace.h"
 #include "xfs_trans_priv.h"
 #include "xfs_buf_item.h"
@@ -565,7 +565,7 @@ out_unlock:
  * Unlock the inode associated with the inode log item.
  */
 STATIC void
-xfs_inode_item_unlock(
+xfs_inode_item_release(
 	struct xfs_log_item	*lip)
 {
 	struct xfs_inode_log_item *iip = INODE_ITEM(lip);
@@ -621,23 +621,21 @@ xfs_inode_item_committed(
 STATIC void
 xfs_inode_item_committing(
 	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+	xfs_lsn_t		commit_lsn)
 {
-	INODE_ITEM(lip)->ili_last_lsn = lsn;
+	INODE_ITEM(lip)->ili_last_lsn = commit_lsn;
+	return xfs_inode_item_release(lip);
 }
 
-/*
- * This is the ops vector shared by all buf log items.
- */
 static const struct xfs_item_ops xfs_inode_item_ops = {
 	.iop_size	= xfs_inode_item_size,
 	.iop_format	= xfs_inode_item_format,
 	.iop_pin	= xfs_inode_item_pin,
 	.iop_unpin	= xfs_inode_item_unpin,
-	.iop_unlock	= xfs_inode_item_unlock,
+	.iop_release	= xfs_inode_item_release,
 	.iop_committed	= xfs_inode_item_committed,
 	.iop_push	= xfs_inode_item_push,
-	.iop_committing = xfs_inode_item_committing,
+	.iop_committing	= xfs_inode_item_committing,
 	.iop_error	= xfs_inode_item_error
 };
 
diff --git a/fs/xfs/xfs_inode_item.h b/fs/xfs/xfs_inode_item.h
index 27081eba220c..07a60e74c39c 100644
--- a/fs/xfs/xfs_inode_item.h
+++ b/fs/xfs/xfs_inode_item.h
@@ -14,7 +14,7 @@ struct xfs_inode;
 struct xfs_mount;
 
 typedef struct xfs_inode_log_item {
-	xfs_log_item_t		ili_item;	   /* common portion */
+	struct xfs_log_item	ili_item;	   /* common portion */
 	struct xfs_inode	*ili_inode;	   /* inode ptr */
 	xfs_lsn_t		ili_flush_lsn;	   /* lsn at last flush */
 	xfs_lsn_t		ili_last_lsn;	   /* lsn at last transaction */
diff --git a/fs/xfs/xfs_ioctl.c b/fs/xfs/xfs_ioctl.c
index 6ecdbb3af7de..6f7848cd5527 100644
--- a/fs/xfs/xfs_ioctl.c
+++ b/fs/xfs/xfs_ioctl.c
@@ -11,9 +11,8 @@
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
-#include "xfs_ioctl.h"
-#include "xfs_alloc.h"
 #include "xfs_rtalloc.h"
+#include "xfs_iwalk.h"
 #include "xfs_itable.h"
 #include "xfs_error.h"
 #include "xfs_attr.h"
@@ -25,7 +24,6 @@
 #include "xfs_export.h"
 #include "xfs_trace.h"
 #include "xfs_icache.h"
-#include "xfs_symlink.h"
 #include "xfs_trans.h"
 #include "xfs_acl.h"
 #include "xfs_btree.h"
@@ -33,15 +31,11 @@
 #include "xfs_fsmap.h"
 #include "scrub/xfs_scrub.h"
 #include "xfs_sb.h"
+#include "xfs_ag.h"
+#include "xfs_health.h"
 
-#include <linux/capability.h>
-#include <linux/cred.h>
-#include <linux/dcache.h>
 #include <linux/mount.h>
 #include <linux/namei.h>
-#include <linux/pagemap.h>
-#include <linux/slab.h>
-#include <linux/exportfs.h>
 
 /*
  * xfs_find_handle maps from userspace xfs_fsop_handlereq structure to
@@ -719,16 +713,45 @@ out_unlock:
 	return error;
 }
 
+/* Return 0 on success or positive error */
+int
+xfs_fsbulkstat_one_fmt(
+	struct xfs_ibulk		*breq,
+	const struct xfs_bulkstat	*bstat)
+{
+	struct xfs_bstat		bs1;
+
+	xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
+	if (copy_to_user(breq->ubuffer, &bs1, sizeof(bs1)))
+		return -EFAULT;
+	return xfs_ibulk_advance(breq, sizeof(struct xfs_bstat));
+}
+
+int
+xfs_fsinumbers_fmt(
+	struct xfs_ibulk		*breq,
+	const struct xfs_inumbers	*igrp)
+{
+	struct xfs_inogrp		ig1;
+
+	xfs_inumbers_to_inogrp(&ig1, igrp);
+	if (copy_to_user(breq->ubuffer, &ig1, sizeof(struct xfs_inogrp)))
+		return -EFAULT;
+	return xfs_ibulk_advance(breq, sizeof(struct xfs_inogrp));
+}
+
 STATIC int
-xfs_ioc_bulkstat(
+xfs_ioc_fsbulkstat(
 	xfs_mount_t		*mp,
 	unsigned int		cmd,
 	void			__user *arg)
 {
-	xfs_fsop_bulkreq_t	bulkreq;
-	int			count;	/* # of records returned */
-	xfs_ino_t		inlast;	/* last inode number */
-	int			done;
+	struct xfs_fsop_bulkreq	bulkreq;
+	struct xfs_ibulk	breq = {
+		.mp		= mp,
+		.ocount		= 0,
+	};
+	xfs_ino_t		lastino;
 	int			error;
 
 	/* done = 1 if there are more stats to get and if bulkstat */
@@ -740,79 +763,287 @@ xfs_ioc_bulkstat(
 	if (XFS_FORCED_SHUTDOWN(mp))
 		return -EIO;
 
-	if (copy_from_user(&bulkreq, arg, sizeof(xfs_fsop_bulkreq_t)))
+	if (copy_from_user(&bulkreq, arg, sizeof(struct xfs_fsop_bulkreq)))
 		return -EFAULT;
 
-	if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
+	if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
 		return -EFAULT;
 
-	if ((count = bulkreq.icount) <= 0)
+	if (bulkreq.icount <= 0)
 		return -EINVAL;
 
 	if (bulkreq.ubuffer == NULL)
 		return -EINVAL;
 
-	if (cmd == XFS_IOC_FSINUMBERS)
-		error = xfs_inumbers(mp, &inlast, &count,
-					bulkreq.ubuffer, xfs_inumbers_fmt);
-	else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE)
-		error = xfs_bulkstat_one(mp, inlast, bulkreq.ubuffer,
-					sizeof(xfs_bstat_t), NULL, &done);
-	else	/* XFS_IOC_FSBULKSTAT */
-		error = xfs_bulkstat(mp, &inlast, &count, xfs_bulkstat_one,
-				     sizeof(xfs_bstat_t), bulkreq.ubuffer,
-				     &done);
+	breq.ubuffer = bulkreq.ubuffer;
+	breq.icount = bulkreq.icount;
+
+	/*
+	 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
+	 * that we want to stat.  However, FSINUMBERS and FSBULKSTAT expect
+	 * that *lastip contains either zero or the number of the last inode to
+	 * be examined by the previous call and return results starting with
+	 * the next inode after that.  The new bulk request back end functions
+	 * take the inode to start with, so we have to compute the startino
+	 * parameter from lastino to maintain correct function.  lastino == 0
+	 * is a special case because it has traditionally meant "first inode
+	 * in filesystem".
+	 */
+	if (cmd == XFS_IOC_FSINUMBERS) {
+		breq.startino = lastino ? lastino + 1 : 0;
+		error = xfs_inumbers(&breq, xfs_fsinumbers_fmt);
+		lastino = breq.startino - 1;
+	} else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE) {
+		breq.startino = lastino;
+		breq.icount = 1;
+		error = xfs_bulkstat_one(&breq, xfs_fsbulkstat_one_fmt);
+	} else {	/* XFS_IOC_FSBULKSTAT */
+		breq.startino = lastino ? lastino + 1 : 0;
+		error = xfs_bulkstat(&breq, xfs_fsbulkstat_one_fmt);
+		lastino = breq.startino - 1;
+	}
 
 	if (error)
 		return error;
 
-	if (bulkreq.ocount != NULL) {
-		if (copy_to_user(bulkreq.lastip, &inlast,
-						sizeof(xfs_ino_t)))
-			return -EFAULT;
+	if (bulkreq.lastip != NULL &&
+	    copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
+		return -EFAULT;
 
-		if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
-			return -EFAULT;
+	if (bulkreq.ocount != NULL &&
+	    copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
+		return -EFAULT;
+
+	return 0;
+}
+
+/* Return 0 on success or positive error */
+static int
+xfs_bulkstat_fmt(
+	struct xfs_ibulk		*breq,
+	const struct xfs_bulkstat	*bstat)
+{
+	if (copy_to_user(breq->ubuffer, bstat, sizeof(struct xfs_bulkstat)))
+		return -EFAULT;
+	return xfs_ibulk_advance(breq, sizeof(struct xfs_bulkstat));
+}
+
+/*
+ * Check the incoming bulk request @hdr from userspace and initialize the
+ * internal @breq bulk request appropriately.  Returns 0 if the bulk request
+ * should proceed; XFS_ITER_ABORT if there's nothing to do; or the usual
+ * negative error code.
+ */
+static int
+xfs_bulk_ireq_setup(
+	struct xfs_mount	*mp,
+	struct xfs_bulk_ireq	*hdr,
+	struct xfs_ibulk	*breq,
+	void __user		*ubuffer)
+{
+	if (hdr->icount == 0 ||
+	    (hdr->flags & ~XFS_BULK_IREQ_FLAGS_ALL) ||
+	    memchr_inv(hdr->reserved, 0, sizeof(hdr->reserved)))
+		return -EINVAL;
+
+	breq->startino = hdr->ino;
+	breq->ubuffer = ubuffer;
+	breq->icount = hdr->icount;
+	breq->ocount = 0;
+	breq->flags = 0;
+
+	/*
+	 * The @ino parameter is a special value, so we must look it up here.
+	 * We're not allowed to have IREQ_AGNO, and we only return one inode
+	 * worth of data.
+	 */
+	if (hdr->flags & XFS_BULK_IREQ_SPECIAL) {
+		if (hdr->flags & XFS_BULK_IREQ_AGNO)
+			return -EINVAL;
+
+		switch (hdr->ino) {
+		case XFS_BULK_IREQ_SPECIAL_ROOT:
+			hdr->ino = mp->m_sb.sb_rootino;
+			break;
+		default:
+			return -EINVAL;
+		}
+		breq->icount = 1;
 	}
 
+	/*
+	 * The IREQ_AGNO flag means that we only want results from a given AG.
+	 * If @hdr->ino is zero, we start iterating in that AG.  If @hdr->ino is
+	 * beyond the specified AG then we return no results.
+	 */
+	if (hdr->flags & XFS_BULK_IREQ_AGNO) {
+		if (hdr->agno >= mp->m_sb.sb_agcount)
+			return -EINVAL;
+
+		if (breq->startino == 0)
+			breq->startino = XFS_AGINO_TO_INO(mp, hdr->agno, 0);
+		else if (XFS_INO_TO_AGNO(mp, breq->startino) < hdr->agno)
+			return -EINVAL;
+
+		breq->flags |= XFS_IBULK_SAME_AG;
+
+		/* Asking for an inode past the end of the AG?  We're done! */
+		if (XFS_INO_TO_AGNO(mp, breq->startino) > hdr->agno)
+			return XFS_ITER_ABORT;
+	} else if (hdr->agno)
+		return -EINVAL;
+
+	/* Asking for an inode past the end of the FS?  We're done! */
+	if (XFS_INO_TO_AGNO(mp, breq->startino) >= mp->m_sb.sb_agcount)
+		return XFS_ITER_ABORT;
+
 	return 0;
 }
 
+/*
+ * Update the userspace bulk request @hdr to reflect the end state of the
+ * internal bulk request @breq.
+ */
+static void
+xfs_bulk_ireq_teardown(
+	struct xfs_bulk_ireq	*hdr,
+	struct xfs_ibulk	*breq)
+{
+	hdr->ino = breq->startino;
+	hdr->ocount = breq->ocount;
+}
+
+/* Handle the v5 bulkstat ioctl. */
 STATIC int
-xfs_ioc_fsgeometry_v1(
-	xfs_mount_t		*mp,
-	void			__user *arg)
+xfs_ioc_bulkstat(
+	struct xfs_mount		*mp,
+	unsigned int			cmd,
+	struct xfs_bulkstat_req __user	*arg)
 {
-	xfs_fsop_geom_t         fsgeo;
-	int			error;
+	struct xfs_bulk_ireq		hdr;
+	struct xfs_ibulk		breq = {
+		.mp			= mp,
+	};
+	int				error;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return -EIO;
+
+	if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
+		return -EFAULT;
 
-	error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
+	error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->bulkstat);
+	if (error == XFS_ITER_ABORT)
+		goto out_teardown;
+	if (error < 0)
+		return error;
+
+	error = xfs_bulkstat(&breq, xfs_bulkstat_fmt);
 	if (error)
 		return error;
 
-	/*
-	 * Caller should have passed an argument of type
-	 * xfs_fsop_geom_v1_t.  This is a proper subset of the
-	 * xfs_fsop_geom_t that xfs_fs_geometry() fills in.
-	 */
-	if (copy_to_user(arg, &fsgeo, sizeof(xfs_fsop_geom_v1_t)))
+out_teardown:
+	xfs_bulk_ireq_teardown(&hdr, &breq);
+	if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
 		return -EFAULT;
+
+	return 0;
+}
+
+STATIC int
+xfs_inumbers_fmt(
+	struct xfs_ibulk		*breq,
+	const struct xfs_inumbers	*igrp)
+{
+	if (copy_to_user(breq->ubuffer, igrp, sizeof(struct xfs_inumbers)))
+		return -EFAULT;
+	return xfs_ibulk_advance(breq, sizeof(struct xfs_inumbers));
+}
+
+/* Handle the v5 inumbers ioctl. */
+STATIC int
+xfs_ioc_inumbers(
+	struct xfs_mount		*mp,
+	unsigned int			cmd,
+	struct xfs_inumbers_req __user	*arg)
+{
+	struct xfs_bulk_ireq		hdr;
+	struct xfs_ibulk		breq = {
+		.mp			= mp,
+	};
+	int				error;
+
+	if (!capable(CAP_SYS_ADMIN))
+		return -EPERM;
+
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return -EIO;
+
+	if (copy_from_user(&hdr, &arg->hdr, sizeof(hdr)))
+		return -EFAULT;
+
+	error = xfs_bulk_ireq_setup(mp, &hdr, &breq, arg->inumbers);
+	if (error == XFS_ITER_ABORT)
+		goto out_teardown;
+	if (error < 0)
+		return error;
+
+	error = xfs_inumbers(&breq, xfs_inumbers_fmt);
+	if (error)
+		return error;
+
+out_teardown:
+	xfs_bulk_ireq_teardown(&hdr, &breq);
+	if (copy_to_user(&arg->hdr, &hdr, sizeof(hdr)))
+		return -EFAULT;
+
 	return 0;
 }
 
 STATIC int
 xfs_ioc_fsgeometry(
-	xfs_mount_t		*mp,
+	struct xfs_mount	*mp,
+	void			__user *arg,
+	int			struct_version)
+{
+	struct xfs_fsop_geom	fsgeo;
+	size_t			len;
+
+	xfs_fs_geometry(&mp->m_sb, &fsgeo, struct_version);
+
+	if (struct_version <= 3)
+		len = sizeof(struct xfs_fsop_geom_v1);
+	else if (struct_version == 4)
+		len = sizeof(struct xfs_fsop_geom_v4);
+	else {
+		xfs_fsop_geom_health(mp, &fsgeo);
+		len = sizeof(fsgeo);
+	}
+
+	if (copy_to_user(arg, &fsgeo, len))
+		return -EFAULT;
+	return 0;
+}
+
+STATIC int
+xfs_ioc_ag_geometry(
+	struct xfs_mount	*mp,
 	void			__user *arg)
 {
-	xfs_fsop_geom_t		fsgeo;
+	struct xfs_ag_geometry	ageo;
 	int			error;
 
-	error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 4);
+	if (copy_from_user(&ageo, arg, sizeof(ageo)))
+		return -EFAULT;
+
+	error = xfs_ag_get_geometry(mp, ageo.ag_number, &ageo);
 	if (error)
 		return error;
 
-	if (copy_to_user(arg, &fsgeo, sizeof(fsgeo)))
+	if (copy_to_user(arg, &ageo, sizeof(ageo)))
 		return -EFAULT;
 	return 0;
 }
@@ -871,37 +1102,44 @@ xfs_di2lxflags(
 	return flags;
 }
 
-STATIC int
-xfs_ioc_fsgetxattr(
-	xfs_inode_t		*ip,
-	int			attr,
-	void			__user *arg)
+static void
+xfs_fill_fsxattr(
+	struct xfs_inode	*ip,
+	bool			attr,
+	struct fsxattr		*fa)
 {
-	struct fsxattr		fa;
-
-	memset(&fa, 0, sizeof(struct fsxattr));
-
-	xfs_ilock(ip, XFS_ILOCK_SHARED);
-	fa.fsx_xflags = xfs_ip2xflags(ip);
-	fa.fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
-	fa.fsx_cowextsize = ip->i_d.di_cowextsize <<
+	simple_fill_fsxattr(fa, xfs_ip2xflags(ip));
+	fa->fsx_extsize = ip->i_d.di_extsize << ip->i_mount->m_sb.sb_blocklog;
+	fa->fsx_cowextsize = ip->i_d.di_cowextsize <<
 			ip->i_mount->m_sb.sb_blocklog;
-	fa.fsx_projid = xfs_get_projid(ip);
+	fa->fsx_projid = xfs_get_projid(ip);
 
 	if (attr) {
 		if (ip->i_afp) {
 			if (ip->i_afp->if_flags & XFS_IFEXTENTS)
-				fa.fsx_nextents = xfs_iext_count(ip->i_afp);
+				fa->fsx_nextents = xfs_iext_count(ip->i_afp);
 			else
-				fa.fsx_nextents = ip->i_d.di_anextents;
+				fa->fsx_nextents = ip->i_d.di_anextents;
 		} else
-			fa.fsx_nextents = 0;
+			fa->fsx_nextents = 0;
 	} else {
 		if (ip->i_df.if_flags & XFS_IFEXTENTS)
-			fa.fsx_nextents = xfs_iext_count(&ip->i_df);
+			fa->fsx_nextents = xfs_iext_count(&ip->i_df);
 		else
-			fa.fsx_nextents = ip->i_d.di_nextents;
+			fa->fsx_nextents = ip->i_d.di_nextents;
 	}
+}
+
+STATIC int
+xfs_ioc_fsgetxattr(
+	xfs_inode_t		*ip,
+	int			attr,
+	void			__user *arg)
+{
+	struct fsxattr		fa;
+
+	xfs_ilock(ip, XFS_ILOCK_SHARED);
+	xfs_fill_fsxattr(ip, attr, &fa);
 	xfs_iunlock(ip, XFS_ILOCK_SHARED);
 
 	if (copy_to_user(arg, &fa, sizeof(fa)))
@@ -1027,15 +1265,6 @@ xfs_ioctl_setattr_xflags(
 	if ((fa->fsx_xflags & FS_XFLAG_DAX) && xfs_is_reflink_inode(ip))
 		return -EINVAL;
 
-	/*
-	 * Can't modify an immutable/append-only file unless
-	 * we have appropriate permission.
-	 */
-	if (((ip->i_d.di_flags & (XFS_DIFLAG_IMMUTABLE | XFS_DIFLAG_APPEND)) ||
-	     (fa->fsx_xflags & (FS_XFLAG_IMMUTABLE | FS_XFLAG_APPEND))) &&
-	    !capable(CAP_LINUX_IMMUTABLE))
-		return -EPERM;
-
 	/* diflags2 only valid for v3 inodes. */
 	di_flags2 = xfs_flags2diflags2(ip, fa->fsx_xflags);
 	if (di_flags2 && ip->i_d.di_version < 3)
@@ -1142,7 +1371,7 @@ xfs_ioctl_setattr_get_trans(
 
 	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_ichange, 0, 0, 0, &tp);
 	if (error)
-		return ERR_PTR(error);
+		goto out_unlock;
 
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
 	xfs_trans_ijoin(tp, ip, XFS_ILOCK_EXCL | join_flags);
@@ -1194,39 +1423,31 @@ xfs_ioctl_setattr_check_extsize(
 	struct fsxattr		*fa)
 {
 	struct xfs_mount	*mp = ip->i_mount;
-
-	if ((fa->fsx_xflags & FS_XFLAG_EXTSIZE) && !S_ISREG(VFS_I(ip)->i_mode))
-		return -EINVAL;
-
-	if ((fa->fsx_xflags & FS_XFLAG_EXTSZINHERIT) &&
-	    !S_ISDIR(VFS_I(ip)->i_mode))
-		return -EINVAL;
+	xfs_extlen_t		size;
+	xfs_fsblock_t		extsize_fsb;
 
 	if (S_ISREG(VFS_I(ip)->i_mode) && ip->i_d.di_nextents &&
 	    ((ip->i_d.di_extsize << mp->m_sb.sb_blocklog) != fa->fsx_extsize))
 		return -EINVAL;
 
-	if (fa->fsx_extsize != 0) {
-		xfs_extlen_t    size;
-		xfs_fsblock_t   extsize_fsb;
-
-		extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
-		if (extsize_fsb > MAXEXTLEN)
-			return -EINVAL;
+	if (fa->fsx_extsize == 0)
+		return 0;
 
-		if (XFS_IS_REALTIME_INODE(ip) ||
-		    (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
-			size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
-		} else {
-			size = mp->m_sb.sb_blocksize;
-			if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
-				return -EINVAL;
-		}
+	extsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_extsize);
+	if (extsize_fsb > MAXEXTLEN)
+		return -EINVAL;
 
-		if (fa->fsx_extsize % size)
+	if (XFS_IS_REALTIME_INODE(ip) ||
+	    (fa->fsx_xflags & FS_XFLAG_REALTIME)) {
+		size = mp->m_sb.sb_rextsize << mp->m_sb.sb_blocklog;
+	} else {
+		size = mp->m_sb.sb_blocksize;
+		if (extsize_fsb > mp->m_sb.sb_agblocks / 2)
 			return -EINVAL;
-	} else
-		fa->fsx_xflags &= ~(FS_XFLAG_EXTSIZE | FS_XFLAG_EXTSZINHERIT);
+	}
+
+	if (fa->fsx_extsize % size)
+		return -EINVAL;
 
 	return 0;
 }
@@ -1252,6 +1473,8 @@ xfs_ioctl_setattr_check_cowextsize(
 	struct fsxattr		*fa)
 {
 	struct xfs_mount	*mp = ip->i_mount;
+	xfs_extlen_t		size;
+	xfs_fsblock_t		cowextsize_fsb;
 
 	if (!(fa->fsx_xflags & FS_XFLAG_COWEXTSIZE))
 		return 0;
@@ -1260,25 +1483,19 @@ xfs_ioctl_setattr_check_cowextsize(
 	    ip->i_d.di_version != 3)
 		return -EINVAL;
 
-	if (!S_ISREG(VFS_I(ip)->i_mode) && !S_ISDIR(VFS_I(ip)->i_mode))
-		return -EINVAL;
-
-	if (fa->fsx_cowextsize != 0) {
-		xfs_extlen_t    size;
-		xfs_fsblock_t   cowextsize_fsb;
+	if (fa->fsx_cowextsize == 0)
+		return 0;
 
-		cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
-		if (cowextsize_fsb > MAXEXTLEN)
-			return -EINVAL;
+	cowextsize_fsb = XFS_B_TO_FSB(mp, fa->fsx_cowextsize);
+	if (cowextsize_fsb > MAXEXTLEN)
+		return -EINVAL;
 
-		size = mp->m_sb.sb_blocksize;
-		if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
-			return -EINVAL;
+	size = mp->m_sb.sb_blocksize;
+	if (cowextsize_fsb > mp->m_sb.sb_agblocks / 2)
+		return -EINVAL;
 
-		if (fa->fsx_cowextsize % size)
-			return -EINVAL;
-	} else
-		fa->fsx_xflags &= ~FS_XFLAG_COWEXTSIZE;
+	if (fa->fsx_cowextsize % size)
+		return -EINVAL;
 
 	return 0;
 }
@@ -1292,21 +1509,6 @@ xfs_ioctl_setattr_check_projid(
 	if (fa->fsx_projid > (uint16_t)-1 &&
 	    !xfs_sb_version_hasprojid32bit(&ip->i_mount->m_sb))
 		return -EINVAL;
-
-	/*
-	 * Project Quota ID state is only allowed to change from within the init
-	 * namespace. Enforce that restriction only if we are trying to change
-	 * the quota ID state. Everything else is allowed in user namespaces.
-	 */
-	if (current_user_ns() == &init_user_ns)
-		return 0;
-
-	if (xfs_get_projid(ip) != fa->fsx_projid)
-		return -EINVAL;
-	if ((fa->fsx_xflags & FS_XFLAG_PROJINHERIT) !=
-	    (ip->i_d.di_flags & XFS_DIFLAG_PROJINHERIT))
-		return -EINVAL;
-
 	return 0;
 }
 
@@ -1315,6 +1517,7 @@ xfs_ioctl_setattr(
 	xfs_inode_t		*ip,
 	struct fsxattr		*fa)
 {
+	struct fsxattr		old_fa;
 	struct xfs_mount	*mp = ip->i_mount;
 	struct xfs_trans	*tp;
 	struct xfs_dquot	*udqp = NULL;
@@ -1362,7 +1565,6 @@ xfs_ioctl_setattr(
 		goto error_free_dquots;
 	}
 
-
 	if (XFS_IS_QUOTA_RUNNING(mp) && XFS_IS_PQUOTA_ON(mp) &&
 	    xfs_get_projid(ip) != fa->fsx_projid) {
 		code = xfs_qm_vop_chown_reserve(tp, ip, udqp, NULL, pdqp,
@@ -1371,6 +1573,11 @@ xfs_ioctl_setattr(
 			goto error_trans_cancel;
 	}
 
+	xfs_fill_fsxattr(ip, false, &old_fa);
+	code = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, fa);
+	if (code)
+		goto error_trans_cancel;
+
 	code = xfs_ioctl_setattr_check_extsize(ip, fa);
 	if (code)
 		goto error_trans_cancel;
@@ -1481,6 +1688,7 @@ xfs_ioc_setxflags(
 {
 	struct xfs_trans	*tp;
 	struct fsxattr		fa;
+	struct fsxattr		old_fa;
 	unsigned int		flags;
 	int			join_flags = 0;
 	int			error;
@@ -1516,6 +1724,13 @@ xfs_ioc_setxflags(
 		goto out_drop_write;
 	}
 
+	xfs_fill_fsxattr(ip, false, &old_fa);
+	error = vfs_ioc_fssetxattr_check(VFS_I(ip), &old_fa, &fa);
+	if (error) {
+		xfs_trans_cancel(tp);
+		goto out_drop_write;
+	}
+
 	error = xfs_ioctl_setattr_xflags(tp, ip, &fa);
 	if (error) {
 		xfs_trans_cancel(tp);
@@ -1934,13 +2149,22 @@ xfs_file_ioctl(
 	case XFS_IOC_FSBULKSTAT_SINGLE:
 	case XFS_IOC_FSBULKSTAT:
 	case XFS_IOC_FSINUMBERS:
+		return xfs_ioc_fsbulkstat(mp, cmd, arg);
+
+	case XFS_IOC_BULKSTAT:
 		return xfs_ioc_bulkstat(mp, cmd, arg);
+	case XFS_IOC_INUMBERS:
+		return xfs_ioc_inumbers(mp, cmd, arg);
 
 	case XFS_IOC_FSGEOMETRY_V1:
-		return xfs_ioc_fsgeometry_v1(mp, arg);
-
+		return xfs_ioc_fsgeometry(mp, arg, 3);
+	case XFS_IOC_FSGEOMETRY_V4:
+		return xfs_ioc_fsgeometry(mp, arg, 4);
 	case XFS_IOC_FSGEOMETRY:
-		return xfs_ioc_fsgeometry(mp, arg);
+		return xfs_ioc_fsgeometry(mp, arg, 5);
+
+	case XFS_IOC_AG_GEOMETRY:
+		return xfs_ioc_ag_geometry(mp, arg);
 
 	case XFS_IOC_GETVERSION:
 		return put_user(inode->i_generation, (int __user *)arg);
@@ -2031,9 +2255,7 @@ xfs_file_ioctl(
 	case XFS_IOC_FSCOUNTS: {
 		xfs_fsop_counts_t out;
 
-		error = xfs_fs_counts(mp, &out);
-		if (error)
-			return error;
+		xfs_fs_counts(mp, &out);
 
 		if (copy_to_user(arg, &out, sizeof(out)))
 			return -EFAULT;
diff --git a/fs/xfs/xfs_ioctl.h b/fs/xfs/xfs_ioctl.h
index 4b17f67c888a..654c0bb1bcf8 100644
--- a/fs/xfs/xfs_ioctl.h
+++ b/fs/xfs/xfs_ioctl.h
@@ -77,4 +77,12 @@ xfs_set_dmattrs(
 	uint			evmask,
 	uint16_t		state);
 
+struct xfs_ibulk;
+struct xfs_bstat;
+struct xfs_inogrp;
+
+int xfs_fsbulkstat_one_fmt(struct xfs_ibulk *breq,
+			   const struct xfs_bulkstat *bstat);
+int xfs_fsinumbers_fmt(struct xfs_ibulk *breq, const struct xfs_inumbers *igrp);
+
 #endif
diff --git a/fs/xfs/xfs_ioctl32.c b/fs/xfs/xfs_ioctl32.c
index 5001dca361e9..7fcf7569743f 100644
--- a/fs/xfs/xfs_ioctl32.c
+++ b/fs/xfs/xfs_ioctl32.c
@@ -3,23 +3,19 @@
  * Copyright (c) 2004-2005 Silicon Graphics, Inc.
  * All Rights Reserved.
  */
-#include <linux/compat.h>
-#include <linux/ioctl.h>
 #include <linux/mount.h>
-#include <linux/slab.h>
-#include <linux/uaccess.h>
 #include <linux/fsmap.h>
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
+#include "xfs_iwalk.h"
 #include "xfs_itable.h"
-#include "xfs_error.h"
 #include "xfs_fsops.h"
-#include "xfs_alloc.h"
 #include "xfs_rtalloc.h"
 #include "xfs_attr.h"
 #include "xfs_ioctl.h"
@@ -52,12 +48,9 @@ xfs_compat_ioc_fsgeometry_v1(
 	struct xfs_mount	  *mp,
 	compat_xfs_fsop_geom_v1_t __user *arg32)
 {
-	xfs_fsop_geom_t		  fsgeo;
-	int			  error;
+	struct xfs_fsop_geom	  fsgeo;
 
-	error = xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
-	if (error)
-		return error;
+	xfs_fs_geometry(&mp->m_sb, &fsgeo, 3);
 	/* The 32-bit variant simply has some padding at the end */
 	if (copy_to_user(arg32, &fsgeo, sizeof(struct compat_xfs_fsop_geom_v1)))
 		return -EFAULT;
@@ -87,27 +80,26 @@ xfs_compat_growfs_rt_copyin(
 }
 
 STATIC int
-xfs_inumbers_fmt_compat(
-	void			__user *ubuffer,
-	const struct xfs_inogrp	*buffer,
-	long			count,
-	long			*written)
+xfs_fsinumbers_fmt_compat(
+	struct xfs_ibulk		*breq,
+	const struct xfs_inumbers	*ig)
 {
-	compat_xfs_inogrp_t	__user *p32 = ubuffer;
-	long			i;
+	struct compat_xfs_inogrp __user	*p32 = breq->ubuffer;
+	struct xfs_inogrp		ig1;
+	struct xfs_inogrp		*igrp = &ig1;
 
-	for (i = 0; i < count; i++) {
-		if (put_user(buffer[i].xi_startino,   &p32[i].xi_startino) ||
-		    put_user(buffer[i].xi_alloccount, &p32[i].xi_alloccount) ||
-		    put_user(buffer[i].xi_allocmask,  &p32[i].xi_allocmask))
-			return -EFAULT;
-	}
-	*written = count * sizeof(*p32);
-	return 0;
+	xfs_inumbers_to_inogrp(&ig1, ig);
+
+	if (put_user(igrp->xi_startino,   &p32->xi_startino) ||
+	    put_user(igrp->xi_alloccount, &p32->xi_alloccount) ||
+	    put_user(igrp->xi_allocmask,  &p32->xi_allocmask))
+		return -EFAULT;
+
+	return xfs_ibulk_advance(breq, sizeof(struct compat_xfs_inogrp));
 }
 
 #else
-#define xfs_inumbers_fmt_compat xfs_inumbers_fmt
+#define xfs_fsinumbers_fmt_compat xfs_fsinumbers_fmt
 #endif	/* BROKEN_X86_ALIGNMENT */
 
 STATIC int
@@ -124,11 +116,14 @@ xfs_ioctl32_bstime_copyin(
 	return 0;
 }
 
-/* xfs_bstat_t has differing alignment on intel, & bstime_t sizes everywhere */
+/*
+ * struct xfs_bstat has differing alignment on intel, & bstime_t sizes
+ * everywhere
+ */
 STATIC int
 xfs_ioctl32_bstat_copyin(
-	xfs_bstat_t		*bstat,
-	compat_xfs_bstat_t	__user *bstat32)
+	struct xfs_bstat		*bstat,
+	struct compat_xfs_bstat	__user	*bstat32)
 {
 	if (get_user(bstat->bs_ino,	&bstat32->bs_ino)	||
 	    get_user(bstat->bs_mode,	&bstat32->bs_mode)	||
@@ -174,16 +169,15 @@ xfs_bstime_store_compat(
 
 /* Return 0 on success or positive error (to xfs_bulkstat()) */
 STATIC int
-xfs_bulkstat_one_fmt_compat(
-	void			__user *ubuffer,
-	int			ubsize,
-	int			*ubused,
-	const xfs_bstat_t	*buffer)
+xfs_fsbulkstat_one_fmt_compat(
+	struct xfs_ibulk		*breq,
+	const struct xfs_bulkstat	*bstat)
 {
-	compat_xfs_bstat_t	__user *p32 = ubuffer;
+	struct compat_xfs_bstat	__user	*p32 = breq->ubuffer;
+	struct xfs_bstat		bs1;
+	struct xfs_bstat		*buffer = &bs1;
 
-	if (ubsize < sizeof(*p32))
-		return -ENOMEM;
+	xfs_bulkstat_to_bstat(breq->mp, &bs1, bstat);
 
 	if (put_user(buffer->bs_ino,	  &p32->bs_ino)		||
 	    put_user(buffer->bs_mode,	  &p32->bs_mode)	||
@@ -208,37 +202,24 @@ xfs_bulkstat_one_fmt_compat(
 	    put_user(buffer->bs_dmstate,  &p32->bs_dmstate)	||
 	    put_user(buffer->bs_aextents, &p32->bs_aextents))
 		return -EFAULT;
-	if (ubused)
-		*ubused = sizeof(*p32);
-	return 0;
-}
 
-STATIC int
-xfs_bulkstat_one_compat(
-	xfs_mount_t	*mp,		/* mount point for filesystem */
-	xfs_ino_t	ino,		/* inode number to get data for */
-	void		__user *buffer,	/* buffer to place output in */
-	int		ubsize,		/* size of buffer */
-	int		*ubused,	/* bytes used by me */
-	int		*stat)		/* BULKSTAT_RV_... */
-{
-	return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
-				    xfs_bulkstat_one_fmt_compat,
-				    ubused, stat);
+	return xfs_ibulk_advance(breq, sizeof(struct compat_xfs_bstat));
 }
 
 /* copied from xfs_ioctl.c */
 STATIC int
-xfs_compat_ioc_bulkstat(
+xfs_compat_ioc_fsbulkstat(
 	xfs_mount_t		  *mp,
 	unsigned int		  cmd,
-	compat_xfs_fsop_bulkreq_t __user *p32)
+	struct compat_xfs_fsop_bulkreq __user *p32)
 {
 	u32			addr;
-	xfs_fsop_bulkreq_t	bulkreq;
-	int			count;	/* # of records returned */
-	xfs_ino_t		inlast;	/* last inode number */
-	int			done;
+	struct xfs_fsop_bulkreq	bulkreq;
+	struct xfs_ibulk	breq = {
+		.mp		= mp,
+		.ocount		= 0,
+	};
+	xfs_ino_t		lastino;
 	int			error;
 
 	/*
@@ -247,9 +228,8 @@ xfs_compat_ioc_bulkstat(
 	 * to userpace memory via bulkreq.ubuffer.  Normally the compat
 	 * functions and structure size are the correct ones to use ...
 	 */
-	inumbers_fmt_pf inumbers_func = xfs_inumbers_fmt_compat;
-	bulkstat_one_pf	bs_one_func = xfs_bulkstat_one_compat;
-	size_t bs_one_size = sizeof(struct compat_xfs_bstat);
+	inumbers_fmt_pf		inumbers_func = xfs_fsinumbers_fmt_compat;
+	bulkstat_one_fmt_pf	bs_one_func = xfs_fsbulkstat_one_fmt_compat;
 
 #ifdef CONFIG_X86_X32
 	if (in_x32_syscall()) {
@@ -261,9 +241,8 @@ xfs_compat_ioc_bulkstat(
 		 * the data written out in compat layout will not match what
 		 * x32 userspace expects.
 		 */
-		inumbers_func = xfs_inumbers_fmt;
-		bs_one_func = xfs_bulkstat_one;
-		bs_one_size = sizeof(struct xfs_bstat);
+		inumbers_func = xfs_fsinumbers_fmt;
+		bs_one_func = xfs_fsbulkstat_one_fmt;
 	}
 #endif
 
@@ -287,40 +266,55 @@ xfs_compat_ioc_bulkstat(
 		return -EFAULT;
 	bulkreq.ocount = compat_ptr(addr);
 
-	if (copy_from_user(&inlast, bulkreq.lastip, sizeof(__s64)))
+	if (copy_from_user(&lastino, bulkreq.lastip, sizeof(__s64)))
 		return -EFAULT;
 
-	if ((count = bulkreq.icount) <= 0)
+	if (bulkreq.icount <= 0)
 		return -EINVAL;
 
 	if (bulkreq.ubuffer == NULL)
 		return -EINVAL;
 
+	breq.ubuffer = bulkreq.ubuffer;
+	breq.icount = bulkreq.icount;
+
+	/*
+	 * FSBULKSTAT_SINGLE expects that *lastip contains the inode number
+	 * that we want to stat.  However, FSINUMBERS and FSBULKSTAT expect
+	 * that *lastip contains either zero or the number of the last inode to
+	 * be examined by the previous call and return results starting with
+	 * the next inode after that.  The new bulk request back end functions
+	 * take the inode to start with, so we have to compute the startino
+	 * parameter from lastino to maintain correct function.  lastino == 0
+	 * is a special case because it has traditionally meant "first inode
+	 * in filesystem".
+	 */
 	if (cmd == XFS_IOC_FSINUMBERS_32) {
-		error = xfs_inumbers(mp, &inlast, &count,
-				bulkreq.ubuffer, inumbers_func);
+		breq.startino = lastino ? lastino + 1 : 0;
+		error = xfs_inumbers(&breq, inumbers_func);
+		lastino = breq.startino - 1;
 	} else if (cmd == XFS_IOC_FSBULKSTAT_SINGLE_32) {
-		int res;
-
-		error = bs_one_func(mp, inlast, bulkreq.ubuffer,
-				bs_one_size, NULL, &res);
+		breq.startino = lastino;
+		breq.icount = 1;
+		error = xfs_bulkstat_one(&breq, bs_one_func);
+		lastino = breq.startino;
 	} else if (cmd == XFS_IOC_FSBULKSTAT_32) {
-		error = xfs_bulkstat(mp, &inlast, &count,
-			bs_one_func, bs_one_size,
-			bulkreq.ubuffer, &done);
-	} else
+		breq.startino = lastino ? lastino + 1 : 0;
+		error = xfs_bulkstat(&breq, bs_one_func);
+		lastino = breq.startino - 1;
+	} else {
 		error = -EINVAL;
+	}
 	if (error)
 		return error;
 
-	if (bulkreq.ocount != NULL) {
-		if (copy_to_user(bulkreq.lastip, &inlast,
-						sizeof(xfs_ino_t)))
-			return -EFAULT;
+	if (bulkreq.lastip != NULL &&
+	    copy_to_user(bulkreq.lastip, &lastino, sizeof(xfs_ino_t)))
+		return -EFAULT;
 
-		if (copy_to_user(bulkreq.ocount, &count, sizeof(count)))
-			return -EFAULT;
-	}
+	if (bulkreq.ocount != NULL &&
+	    copy_to_user(bulkreq.ocount, &breq.ocount, sizeof(__s32)))
+		return -EFAULT;
 
 	return 0;
 }
@@ -561,7 +555,9 @@ xfs_file_compat_ioctl(
 	switch (cmd) {
 	/* No size or alignment issues on any arch */
 	case XFS_IOC_DIOINFO:
+	case XFS_IOC_FSGEOMETRY_V4:
 	case XFS_IOC_FSGEOMETRY:
+	case XFS_IOC_AG_GEOMETRY:
 	case XFS_IOC_FSGETXATTR:
 	case XFS_IOC_FSSETXATTR:
 	case XFS_IOC_FSGETXATTRA:
@@ -578,6 +574,8 @@ xfs_file_compat_ioctl(
 	case XFS_IOC_ERROR_CLEARALL:
 	case FS_IOC_GETFSMAP:
 	case XFS_IOC_SCRUB_METADATA:
+	case XFS_IOC_BULKSTAT:
+	case XFS_IOC_INUMBERS:
 		return xfs_file_ioctl(filp, cmd, p);
 #if !defined(BROKEN_X86_ALIGNMENT) || defined(CONFIG_X86_X32)
 	/*
@@ -675,7 +673,7 @@ xfs_file_compat_ioctl(
 	case XFS_IOC_FSBULKSTAT_32:
 	case XFS_IOC_FSBULKSTAT_SINGLE_32:
 	case XFS_IOC_FSINUMBERS_32:
-		return xfs_compat_ioc_bulkstat(mp, cmd, arg);
+		return xfs_compat_ioc_fsbulkstat(mp, cmd, arg);
 	case XFS_IOC_FD_TO_HANDLE_32:
 	case XFS_IOC_PATH_TO_HANDLE_32:
 	case XFS_IOC_PATH_TO_FSHANDLE_32: {
diff --git a/fs/xfs/xfs_ioctl32.h b/fs/xfs/xfs_ioctl32.h
index d28fa824284a..7985344d3aa6 100644
--- a/fs/xfs/xfs_ioctl32.h
+++ b/fs/xfs/xfs_ioctl32.h
@@ -36,7 +36,7 @@ typedef struct compat_xfs_bstime {
 	__s32		tv_nsec;	/* and nanoseconds	*/
 } compat_xfs_bstime_t;
 
-typedef struct compat_xfs_bstat {
+struct compat_xfs_bstat {
 	__u64		bs_ino;		/* inode number			*/
 	__u16		bs_mode;	/* type and mode		*/
 	__u16		bs_nlink;	/* number of links		*/
@@ -61,14 +61,14 @@ typedef struct compat_xfs_bstat {
 	__u32		bs_dmevmask;	/* DMIG event mask		*/
 	__u16		bs_dmstate;	/* DMIG state info		*/
 	__u16		bs_aextents;	/* attribute number of extents	*/
-} __compat_packed compat_xfs_bstat_t;
+} __compat_packed;
 
-typedef struct compat_xfs_fsop_bulkreq {
+struct compat_xfs_fsop_bulkreq {
 	compat_uptr_t	lastip;		/* last inode # pointer		*/
 	__s32		icount;		/* count of entries in buffer	*/
 	compat_uptr_t	ubuffer;	/* user buffer for inode desc.	*/
 	compat_uptr_t	ocount;		/* output count pointer		*/
-} compat_xfs_fsop_bulkreq_t;
+};
 
 #define XFS_IOC_FSBULKSTAT_32 \
 	_IOWR('X', 101, struct compat_xfs_fsop_bulkreq)
@@ -106,7 +106,7 @@ typedef struct compat_xfs_swapext {
 	xfs_off_t		sx_offset;	/* offset into file */
 	xfs_off_t		sx_length;	/* leng from offset */
 	char			sx_pad[16];	/* pad space, unused */
-	compat_xfs_bstat_t	sx_stat;	/* stat of target b4 copy */
+	struct compat_xfs_bstat	sx_stat;	/* stat of target b4 copy */
 } __compat_packed compat_xfs_swapext_t;
 
 #define XFS_IOC_SWAPEXT_32	_IOWR('X', 109, struct compat_xfs_swapext)
@@ -201,11 +201,11 @@ typedef struct compat_xfs_fsop_geom_v1 {
 #define XFS_IOC_FSGEOMETRY_V1_32  \
 	_IOR('X', 100, struct compat_xfs_fsop_geom_v1)
 
-typedef struct compat_xfs_inogrp {
+struct compat_xfs_inogrp {
 	__u64		xi_startino;	/* starting inode number	*/
 	__s32		xi_alloccount;	/* # bits set in allocmask	*/
 	__u64		xi_allocmask;	/* mask of allocated inodes	*/
-} __attribute__((packed)) compat_xfs_inogrp_t;
+} __attribute__((packed));
 
 /* These growfs input structures have padding on the end, so must translate */
 typedef struct compat_xfs_growfs_data {
diff --git a/fs/xfs/xfs_iomap.c b/fs/xfs/xfs_iomap.c
index 27c93b5f029d..3a4310d7cb59 100644
--- a/fs/xfs/xfs_iomap.c
+++ b/fs/xfs/xfs_iomap.c
@@ -4,7 +4,6 @@
  * Copyright (c) 2016-2018 Christoph Hellwig.
  * All Rights Reserved.
  */
-#include <linux/iomap.h>
 #include "xfs.h"
 #include "xfs_fs.h"
 #include "xfs_shared.h"
@@ -12,7 +11,6 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_bmap_btree.h"
@@ -25,7 +23,6 @@
 #include "xfs_inode_item.h"
 #include "xfs_iomap.h"
 #include "xfs_trace.h"
-#include "xfs_icache.h"
 #include "xfs_quota.h"
 #include "xfs_dquot_item.h"
 #include "xfs_dquot.h"
@@ -35,18 +32,40 @@
 #define XFS_WRITEIO_ALIGN(mp,off)	(((off) >> mp->m_writeio_log) \
 						<< mp->m_writeio_log)
 
-void
+static int
+xfs_alert_fsblock_zero(
+	xfs_inode_t	*ip,
+	xfs_bmbt_irec_t	*imap)
+{
+	xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO,
+			"Access to block zero in inode %llu "
+			"start_block: %llx start_off: %llx "
+			"blkcnt: %llx extent-state: %x",
+		(unsigned long long)ip->i_ino,
+		(unsigned long long)imap->br_startblock,
+		(unsigned long long)imap->br_startoff,
+		(unsigned long long)imap->br_blockcount,
+		imap->br_state);
+	return -EFSCORRUPTED;
+}
+
+int
 xfs_bmbt_to_iomap(
 	struct xfs_inode	*ip,
 	struct iomap		*iomap,
-	struct xfs_bmbt_irec	*imap)
+	struct xfs_bmbt_irec	*imap,
+	bool			shared)
 {
 	struct xfs_mount	*mp = ip->i_mount;
 
+	if (unlikely(!imap->br_startblock && !XFS_IS_REALTIME_INODE(ip)))
+		return xfs_alert_fsblock_zero(ip, imap);
+
 	if (imap->br_startblock == HOLESTARTBLOCK) {
 		iomap->addr = IOMAP_NULL_ADDR;
 		iomap->type = IOMAP_HOLE;
-	} else if (imap->br_startblock == DELAYSTARTBLOCK) {
+	} else if (imap->br_startblock == DELAYSTARTBLOCK ||
+		   isnullstartblock(imap->br_startblock)) {
 		iomap->addr = IOMAP_NULL_ADDR;
 		iomap->type = IOMAP_DELALLOC;
 	} else {
@@ -60,6 +79,13 @@ xfs_bmbt_to_iomap(
 	iomap->length = XFS_FSB_TO_B(mp, imap->br_blockcount);
 	iomap->bdev = xfs_find_bdev_for_inode(VFS_I(ip));
 	iomap->dax_dev = xfs_find_daxdev_for_inode(VFS_I(ip));
+
+	if (xfs_ipincount(ip) &&
+	    (ip->i_itemp->ili_fsync_fields & ~XFS_ILOG_TIMESTAMP))
+		iomap->flags |= IOMAP_F_DIRTY;
+	if (shared)
+		iomap->flags |= IOMAP_F_SHARED;
+	return 0;
 }
 
 static void
@@ -138,23 +164,6 @@ xfs_iomap_eof_align_last_fsb(
 	return 0;
 }
 
-STATIC int
-xfs_alert_fsblock_zero(
-	xfs_inode_t	*ip,
-	xfs_bmbt_irec_t	*imap)
-{
-	xfs_alert_tag(ip->i_mount, XFS_PTAG_FSBLOCK_ZERO,
-			"Access to block zero in inode %llu "
-			"start_block: %llx start_off: %llx "
-			"blkcnt: %llx extent-state: %x",
-		(unsigned long long)ip->i_ino,
-		(unsigned long long)imap->br_startblock,
-		(unsigned long long)imap->br_startoff,
-		(unsigned long long)imap->br_blockcount,
-		imap->br_state);
-	return -EFSCORRUPTED;
-}
-
 int
 xfs_iomap_write_direct(
 	xfs_inode_t	*ip,
@@ -383,12 +392,13 @@ xfs_quota_calc_throttle(
 STATIC xfs_fsblock_t
 xfs_iomap_prealloc_size(
 	struct xfs_inode	*ip,
+	int			whichfork,
 	loff_t			offset,
 	loff_t			count,
 	struct xfs_iext_cursor	*icur)
 {
 	struct xfs_mount	*mp = ip->i_mount;
-	struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
+	struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, whichfork);
 	xfs_fileoff_t		offset_fsb = XFS_B_TO_FSBT(mp, offset);
 	struct xfs_bmbt_irec	prev;
 	int			shift = 0;
@@ -522,15 +532,16 @@ xfs_file_iomap_begin_delay(
 {
 	struct xfs_inode	*ip = XFS_I(inode);
 	struct xfs_mount	*mp = ip->i_mount;
-	struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
 	xfs_fileoff_t		offset_fsb = XFS_B_TO_FSBT(mp, offset);
 	xfs_fileoff_t		maxbytes_fsb =
 		XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes);
 	xfs_fileoff_t		end_fsb;
-	int			error = 0, eof = 0;
-	struct xfs_bmbt_irec	got;
-	struct xfs_iext_cursor	icur;
+	struct xfs_bmbt_irec	imap, cmap;
+	struct xfs_iext_cursor	icur, ccur;
 	xfs_fsblock_t		prealloc_blocks = 0;
+	bool			eof = false, cow_eof = false, shared = false;
+	int			whichfork = XFS_DATA_FORK;
+	int			error = 0;
 
 	ASSERT(!XFS_IS_REALTIME_INODE(ip));
 	ASSERT(!xfs_get_extsz_hint(ip));
@@ -548,7 +559,7 @@ xfs_file_iomap_begin_delay(
 
 	XFS_STATS_INC(mp, xs_blk_mapw);
 
-	if (!(ifp->if_flags & XFS_IFEXTENTS)) {
+	if (!(ip->i_df.if_flags & XFS_IFEXTENTS)) {
 		error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK);
 		if (error)
 			goto out_unlock;
@@ -556,53 +567,101 @@ xfs_file_iomap_begin_delay(
 
 	end_fsb = min(XFS_B_TO_FSB(mp, offset + count), maxbytes_fsb);
 
-	eof = !xfs_iext_lookup_extent(ip, ifp, offset_fsb, &icur, &got);
+	/*
+	 * Search the data fork fork first to look up our source mapping.  We
+	 * always need the data fork map, as we have to return it to the
+	 * iomap code so that the higher level write code can read data in to
+	 * perform read-modify-write cycles for unaligned writes.
+	 */
+	eof = !xfs_iext_lookup_extent(ip, &ip->i_df, offset_fsb, &icur, &imap);
 	if (eof)
-		got.br_startoff = end_fsb; /* fake hole until the end */
+		imap.br_startoff = end_fsb; /* fake hole until the end */
+
+	/* We never need to allocate blocks for zeroing a hole. */
+	if ((flags & IOMAP_ZERO) && imap.br_startoff > offset_fsb) {
+		xfs_hole_to_iomap(ip, iomap, offset_fsb, imap.br_startoff);
+		goto out_unlock;
+	}
 
-	if (got.br_startoff <= offset_fsb) {
+	/*
+	 * Search the COW fork extent list even if we did not find a data fork
+	 * extent.  This serves two purposes: first this implements the
+	 * speculative preallocation using cowextsize, so that we also unshare
+	 * block adjacent to shared blocks instead of just the shared blocks
+	 * themselves.  Second the lookup in the extent list is generally faster
+	 * than going out to the shared extent tree.
+	 */
+	if (xfs_is_cow_inode(ip)) {
+		if (!ip->i_cowfp) {
+			ASSERT(!xfs_is_reflink_inode(ip));
+			xfs_ifork_init_cow(ip);
+		}
+		cow_eof = !xfs_iext_lookup_extent(ip, ip->i_cowfp, offset_fsb,
+				&ccur, &cmap);
+		if (!cow_eof && cmap.br_startoff <= offset_fsb) {
+			trace_xfs_reflink_cow_found(ip, &cmap);
+			whichfork = XFS_COW_FORK;
+			goto done;
+		}
+	}
+
+	if (imap.br_startoff <= offset_fsb) {
 		/*
 		 * For reflink files we may need a delalloc reservation when
 		 * overwriting shared extents.   This includes zeroing of
 		 * existing extents that contain data.
 		 */
-		if (xfs_is_reflink_inode(ip) &&
-		    ((flags & IOMAP_WRITE) ||
-		     got.br_state != XFS_EXT_UNWRITTEN)) {
-			xfs_trim_extent(&got, offset_fsb, end_fsb - offset_fsb);
-			error = xfs_reflink_reserve_cow(ip, &got);
-			if (error)
-				goto out_unlock;
+		if (!xfs_is_cow_inode(ip) ||
+		    ((flags & IOMAP_ZERO) && imap.br_state != XFS_EXT_NORM)) {
+			trace_xfs_iomap_found(ip, offset, count, XFS_DATA_FORK,
+					&imap);
+			goto done;
 		}
 
-		trace_xfs_iomap_found(ip, offset, count, 0, &got);
-		goto done;
-	}
+		xfs_trim_extent(&imap, offset_fsb, end_fsb - offset_fsb);
 
-	if (flags & IOMAP_ZERO) {
-		xfs_hole_to_iomap(ip, iomap, offset_fsb, got.br_startoff);
-		goto out_unlock;
+		/* Trim the mapping to the nearest shared extent boundary. */
+		error = xfs_inode_need_cow(ip, &imap, &shared);
+		if (error)
+			goto out_unlock;
+
+		/* Not shared?  Just report the (potentially capped) extent. */
+		if (!shared) {
+			trace_xfs_iomap_found(ip, offset, count, XFS_DATA_FORK,
+					&imap);
+			goto done;
+		}
+
+		/*
+		 * Fork all the shared blocks from our write offset until the
+		 * end of the extent.
+		 */
+		whichfork = XFS_COW_FORK;
+		end_fsb = imap.br_startoff + imap.br_blockcount;
+	} else {
+		/*
+		 * We cap the maximum length we map here to MAX_WRITEBACK_PAGES
+		 * pages to keep the chunks of work done where somewhat
+		 * symmetric with the work writeback does.  This is a completely
+		 * arbitrary number pulled out of thin air.
+		 *
+		 * Note that the values needs to be less than 32-bits wide until
+		 * the lower level functions are updated.
+		 */
+		count = min_t(loff_t, count, 1024 * PAGE_SIZE);
+		end_fsb = min(XFS_B_TO_FSB(mp, offset + count), maxbytes_fsb);
+
+		if (xfs_is_always_cow_inode(ip))
+			whichfork = XFS_COW_FORK;
 	}
 
 	error = xfs_qm_dqattach_locked(ip, false);
 	if (error)
 		goto out_unlock;
 
-	/*
-	 * We cap the maximum length we map here to MAX_WRITEBACK_PAGES pages
-	 * to keep the chunks of work done where somewhat symmetric with the
-	 * work writeback does. This is a completely arbitrary number pulled
-	 * out of thin air as a best guess for initial testing.
-	 *
-	 * Note that the values needs to be less than 32-bits wide until
-	 * the lower level functions are updated.
-	 */
-	count = min_t(loff_t, count, 1024 * PAGE_SIZE);
-	end_fsb = min(XFS_B_TO_FSB(mp, offset + count), maxbytes_fsb);
-
 	if (eof) {
-		prealloc_blocks = xfs_iomap_prealloc_size(ip, offset, count,
-				&icur);
+		prealloc_blocks = xfs_iomap_prealloc_size(ip, whichfork, offset,
+				count, &icur);
 		if (prealloc_blocks) {
 			xfs_extlen_t	align;
 			xfs_off_t	end_offset;
@@ -623,9 +682,11 @@ xfs_file_iomap_begin_delay(
 	}
 
 retry:
-	error = xfs_bmapi_reserve_delalloc(ip, XFS_DATA_FORK, offset_fsb,
-			end_fsb - offset_fsb, prealloc_blocks, &got, &icur,
-			eof);
+	error = xfs_bmapi_reserve_delalloc(ip, whichfork, offset_fsb,
+			end_fsb - offset_fsb, prealloc_blocks,
+			whichfork == XFS_DATA_FORK ? &imap : &cmap,
+			whichfork == XFS_DATA_FORK ? &icur : &ccur,
+			whichfork == XFS_DATA_FORK ? eof : cow_eof);
 	switch (error) {
 	case 0:
 		break;
@@ -647,186 +708,22 @@ retry:
 	 * them out if the write happens to fail.
 	 */
 	iomap->flags |= IOMAP_F_NEW;
-	trace_xfs_iomap_alloc(ip, offset, count, 0, &got);
+	trace_xfs_iomap_alloc(ip, offset, count, whichfork,
+			whichfork == XFS_DATA_FORK ? &imap : &cmap);
 done:
-	if (isnullstartblock(got.br_startblock))
-		got.br_startblock = DELAYSTARTBLOCK;
-
-	if (!got.br_startblock) {
-		error = xfs_alert_fsblock_zero(ip, &got);
-		if (error)
+	if (whichfork == XFS_COW_FORK) {
+		if (imap.br_startoff > offset_fsb) {
+			xfs_trim_extent(&cmap, offset_fsb,
+					imap.br_startoff - offset_fsb);
+			error = xfs_bmbt_to_iomap(ip, iomap, &cmap, true);
 			goto out_unlock;
-	}
-
-	xfs_bmbt_to_iomap(ip, iomap, &got);
-
-out_unlock:
-	xfs_iunlock(ip, XFS_ILOCK_EXCL);
-	return error;
-}
-
-/*
- * Pass in a delayed allocate extent, convert it to real extents;
- * return to the caller the extent we create which maps on top of
- * the originating callers request.
- *
- * Called without a lock on the inode.
- *
- * We no longer bother to look at the incoming map - all we have to
- * guarantee is that whatever we allocate fills the required range.
- */
-int
-xfs_iomap_write_allocate(
-	xfs_inode_t	*ip,
-	int		whichfork,
-	xfs_off_t	offset,
-	xfs_bmbt_irec_t *imap,
-	unsigned int	*cow_seq)
-{
-	xfs_mount_t	*mp = ip->i_mount;
-	struct xfs_ifork *ifp = XFS_IFORK_PTR(ip, whichfork);
-	xfs_fileoff_t	offset_fsb, last_block;
-	xfs_fileoff_t	end_fsb, map_start_fsb;
-	xfs_filblks_t	count_fsb;
-	xfs_trans_t	*tp;
-	int		nimaps;
-	int		error = 0;
-	int		flags = XFS_BMAPI_DELALLOC;
-	int		nres;
-
-	if (whichfork == XFS_COW_FORK)
-		flags |= XFS_BMAPI_COWFORK | XFS_BMAPI_PREALLOC;
-
-	/*
-	 * Make sure that the dquots are there.
-	 */
-	error = xfs_qm_dqattach(ip);
-	if (error)
-		return error;
-
-	offset_fsb = XFS_B_TO_FSBT(mp, offset);
-	count_fsb = imap->br_blockcount;
-	map_start_fsb = imap->br_startoff;
-
-	XFS_STATS_ADD(mp, xs_xstrat_bytes, XFS_FSB_TO_B(mp, count_fsb));
-
-	while (count_fsb != 0) {
-		/*
-		 * Set up a transaction with which to allocate the
-		 * backing store for the file.  Do allocations in a
-		 * loop until we get some space in the range we are
-		 * interested in.  The other space that might be allocated
-		 * is in the delayed allocation extent on which we sit
-		 * but before our buffer starts.
-		 */
-		nimaps = 0;
-		while (nimaps == 0) {
-			nres = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK);
-			/*
-			 * We have already reserved space for the extent and any
-			 * indirect blocks when creating the delalloc extent,
-			 * there is no need to reserve space in this transaction
-			 * again.
-			 */
-			error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, 0,
-					0, XFS_TRANS_RESERVE, &tp);
-			if (error)
-				return error;
-
-			xfs_ilock(ip, XFS_ILOCK_EXCL);
-			xfs_trans_ijoin(tp, ip, 0);
-
-			/*
-			 * it is possible that the extents have changed since
-			 * we did the read call as we dropped the ilock for a
-			 * while. We have to be careful about truncates or hole
-			 * punchs here - we are not allowed to allocate
-			 * non-delalloc blocks here.
-			 *
-			 * The only protection against truncation is the pages
-			 * for the range we are being asked to convert are
-			 * locked and hence a truncate will block on them
-			 * first.
-			 *
-			 * As a result, if we go beyond the range we really
-			 * need and hit an delalloc extent boundary followed by
-			 * a hole while we have excess blocks in the map, we
-			 * will fill the hole incorrectly and overrun the
-			 * transaction reservation.
-			 *
-			 * Using a single map prevents this as we are forced to
-			 * check each map we look for overlap with the desired
-			 * range and abort as soon as we find it. Also, given
-			 * that we only return a single map, having one beyond
-			 * what we can return is probably a bit silly.
-			 *
-			 * We also need to check that we don't go beyond EOF;
-			 * this is a truncate optimisation as a truncate sets
-			 * the new file size before block on the pages we
-			 * currently have locked under writeback. Because they
-			 * are about to be tossed, we don't need to write them
-			 * back....
-			 */
-			nimaps = 1;
-			end_fsb = XFS_B_TO_FSB(mp, XFS_ISIZE(ip));
-			error = xfs_bmap_last_offset(ip, &last_block,
-							XFS_DATA_FORK);
-			if (error)
-				goto trans_cancel;
-
-			last_block = XFS_FILEOFF_MAX(last_block, end_fsb);
-			if ((map_start_fsb + count_fsb) > last_block) {
-				count_fsb = last_block - map_start_fsb;
-				if (count_fsb == 0) {
-					error = -EAGAIN;
-					goto trans_cancel;
-				}
-			}
-
-			/*
-			 * From this point onwards we overwrite the imap
-			 * pointer that the caller gave to us.
-			 */
-			error = xfs_bmapi_write(tp, ip, map_start_fsb,
-						count_fsb, flags, nres, imap,
-						&nimaps);
-			if (error)
-				goto trans_cancel;
-
-			error = xfs_trans_commit(tp);
-			if (error)
-				goto error0;
-
-			if (whichfork == XFS_COW_FORK)
-				*cow_seq = READ_ONCE(ifp->if_seq);
-			xfs_iunlock(ip, XFS_ILOCK_EXCL);
-		}
-
-		/*
-		 * See if we were able to allocate an extent that
-		 * covers at least part of the callers request
-		 */
-		if (!(imap->br_startblock || XFS_IS_REALTIME_INODE(ip)))
-			return xfs_alert_fsblock_zero(ip, imap);
-
-		if ((offset_fsb >= imap->br_startoff) &&
-		    (offset_fsb < (imap->br_startoff +
-				   imap->br_blockcount))) {
-			XFS_STATS_INC(mp, xs_xstrat_quick);
-			return 0;
 		}
-
-		/*
-		 * So far we have not mapped the requested part of the
-		 * file, just surrounding data, try again.
-		 */
-		count_fsb -= imap->br_blockcount;
-		map_start_fsb = imap->br_startoff + imap->br_blockcount;
+		/* ensure we only report blocks we have a reservation for */
+		xfs_trim_extent(&imap, cmap.br_startoff, cmap.br_blockcount);
+		shared = true;
 	}
-
-trans_cancel:
-	xfs_trans_cancel(tp);
-error0:
+	error = xfs_bmbt_to_iomap(ip, iomap, &imap, shared);
+out_unlock:
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	return error;
 }
@@ -879,7 +776,7 @@ xfs_iomap_write_unwritten(
 		 * complete here and might deadlock on the iolock.
 		 */
 		error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, resblks, 0,
-				XFS_TRANS_RESERVE | XFS_TRANS_NOFS, &tp);
+				XFS_TRANS_RESERVE, &tp);
 		if (error)
 			return error;
 
@@ -975,7 +872,7 @@ xfs_ilock_for_iomap(
 	 * COW writes may allocate delalloc space or convert unwritten COW
 	 * extents, so we need to make sure to take the lock exclusively here.
 	 */
-	if (xfs_is_reflink_inode(ip) && is_write) {
+	if (xfs_is_cow_inode(ip) && is_write) {
 		/*
 		 * FIXME: It could still overwrite on unshared extents and not
 		 * need allocation.
@@ -1009,7 +906,7 @@ relock:
 	 * check, so if we got ILOCK_SHARED for a write and but we're now a
 	 * reflink inode we have to switch to ILOCK_EXCL and relock.
 	 */
-	if (mode == XFS_ILOCK_SHARED && is_write && xfs_is_reflink_inode(ip)) {
+	if (mode == XFS_ILOCK_SHARED && is_write && xfs_is_cow_inode(ip)) {
 		xfs_iunlock(ip, mode);
 		mode = XFS_ILOCK_EXCL;
 		goto relock;
@@ -1081,23 +978,33 @@ xfs_file_iomap_begin(
 	 * Break shared extents if necessary. Checks for non-blocking IO have
 	 * been done up front, so we don't need to do them here.
 	 */
-	if (xfs_is_reflink_inode(ip)) {
+	if (xfs_is_cow_inode(ip)) {
+		struct xfs_bmbt_irec	cmap;
+		bool			directio = (flags & IOMAP_DIRECT);
+
 		/* if zeroing doesn't need COW allocation, then we are done. */
 		if ((flags & IOMAP_ZERO) &&
 		    !needs_cow_for_zeroing(&imap, nimaps))
 			goto out_found;
 
-		if (flags & IOMAP_DIRECT) {
-			/* may drop and re-acquire the ilock */
-			error = xfs_reflink_allocate_cow(ip, &imap, &shared,
-					&lockmode);
-			if (error)
-				goto out_unlock;
-		} else {
-			error = xfs_reflink_reserve_cow(ip, &imap);
-			if (error)
-				goto out_unlock;
-		}
+		/* may drop and re-acquire the ilock */
+		cmap = imap;
+		error = xfs_reflink_allocate_cow(ip, &cmap, &shared, &lockmode,
+				directio);
+		if (error)
+			goto out_unlock;
+
+		/*
+		 * For buffered writes we need to report the address of the
+		 * previous block (if there was any) so that the higher level
+		 * write code can perform read-modify-write operations; we
+		 * won't need the CoW fork mapping until writeback.  For direct
+		 * I/O, which must be block aligned, we need to report the
+		 * newly allocated address.  If the data fork has a hole, copy
+		 * the COW fork mapping to avoid allocating to the data fork.
+		 */
+		if (directio || imap.br_startblock == HOLESTARTBLOCK)
+			imap = cmap;
 
 		end_fsb = imap.br_startoff + imap.br_blockcount;
 		length = XFS_FSB_TO_B(mp, end_fsb) - offset;
@@ -1139,23 +1046,15 @@ xfs_file_iomap_begin(
 		return error;
 
 	iomap->flags |= IOMAP_F_NEW;
-	trace_xfs_iomap_alloc(ip, offset, length, 0, &imap);
+	trace_xfs_iomap_alloc(ip, offset, length, XFS_DATA_FORK, &imap);
 
 out_finish:
-	if (xfs_ipincount(ip) && (ip->i_itemp->ili_fsync_fields
-				& ~XFS_ILOG_TIMESTAMP))
-		iomap->flags |= IOMAP_F_DIRTY;
-
-	xfs_bmbt_to_iomap(ip, iomap, &imap);
-
-	if (shared)
-		iomap->flags |= IOMAP_F_SHARED;
-	return 0;
+	return xfs_bmbt_to_iomap(ip, iomap, &imap, shared);
 
 out_found:
 	ASSERT(nimaps);
 	xfs_iunlock(ip, lockmode);
-	trace_xfs_iomap_found(ip, offset, length, 0, &imap);
+	trace_xfs_iomap_found(ip, offset, length, XFS_DATA_FORK, &imap);
 	goto out_finish;
 
 out_unlock:
@@ -1241,6 +1140,92 @@ const struct iomap_ops xfs_iomap_ops = {
 };
 
 static int
+xfs_seek_iomap_begin(
+	struct inode		*inode,
+	loff_t			offset,
+	loff_t			length,
+	unsigned		flags,
+	struct iomap		*iomap)
+{
+	struct xfs_inode	*ip = XFS_I(inode);
+	struct xfs_mount	*mp = ip->i_mount;
+	xfs_fileoff_t		offset_fsb = XFS_B_TO_FSBT(mp, offset);
+	xfs_fileoff_t		end_fsb = XFS_B_TO_FSB(mp, offset + length);
+	xfs_fileoff_t		cow_fsb = NULLFILEOFF, data_fsb = NULLFILEOFF;
+	struct xfs_iext_cursor	icur;
+	struct xfs_bmbt_irec	imap, cmap;
+	int			error = 0;
+	unsigned		lockmode;
+
+	if (XFS_FORCED_SHUTDOWN(mp))
+		return -EIO;
+
+	lockmode = xfs_ilock_data_map_shared(ip);
+	if (!(ip->i_df.if_flags & XFS_IFEXTENTS)) {
+		error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK);
+		if (error)
+			goto out_unlock;
+	}
+
+	if (xfs_iext_lookup_extent(ip, &ip->i_df, offset_fsb, &icur, &imap)) {
+		/*
+		 * If we found a data extent we are done.
+		 */
+		if (imap.br_startoff <= offset_fsb)
+			goto done;
+		data_fsb = imap.br_startoff;
+	} else {
+		/*
+		 * Fake a hole until the end of the file.
+		 */
+		data_fsb = min(XFS_B_TO_FSB(mp, offset + length),
+			       XFS_B_TO_FSB(mp, mp->m_super->s_maxbytes));
+	}
+
+	/*
+	 * If a COW fork extent covers the hole, report it - capped to the next
+	 * data fork extent:
+	 */
+	if (xfs_inode_has_cow_data(ip) &&
+	    xfs_iext_lookup_extent(ip, ip->i_cowfp, offset_fsb, &icur, &cmap))
+		cow_fsb = cmap.br_startoff;
+	if (cow_fsb != NULLFILEOFF && cow_fsb <= offset_fsb) {
+		if (data_fsb < cow_fsb + cmap.br_blockcount)
+			end_fsb = min(end_fsb, data_fsb);
+		xfs_trim_extent(&cmap, offset_fsb, end_fsb);
+		error = xfs_bmbt_to_iomap(ip, iomap, &cmap, true);
+		/*
+		 * This is a COW extent, so we must probe the page cache
+		 * because there could be dirty page cache being backed
+		 * by this extent.
+		 */
+		iomap->type = IOMAP_UNWRITTEN;
+		goto out_unlock;
+	}
+
+	/*
+	 * Else report a hole, capped to the next found data or COW extent.
+	 */
+	if (cow_fsb != NULLFILEOFF && cow_fsb < data_fsb)
+		imap.br_blockcount = cow_fsb - offset_fsb;
+	else
+		imap.br_blockcount = data_fsb - offset_fsb;
+	imap.br_startoff = offset_fsb;
+	imap.br_startblock = HOLESTARTBLOCK;
+	imap.br_state = XFS_EXT_NORM;
+done:
+	xfs_trim_extent(&imap, offset_fsb, end_fsb);
+	error = xfs_bmbt_to_iomap(ip, iomap, &imap, false);
+out_unlock:
+	xfs_iunlock(ip, lockmode);
+	return error;
+}
+
+const struct iomap_ops xfs_seek_iomap_ops = {
+	.iomap_begin		= xfs_seek_iomap_begin,
+};
+
+static int
 xfs_xattr_iomap_begin(
 	struct inode		*inode,
 	loff_t			offset,
@@ -1273,12 +1258,10 @@ xfs_xattr_iomap_begin(
 out_unlock:
 	xfs_iunlock(ip, lockmode);
 
-	if (!error) {
-		ASSERT(nimaps);
-		xfs_bmbt_to_iomap(ip, iomap, &imap);
-	}
-
-	return error;
+	if (error)
+		return error;
+	ASSERT(nimaps);
+	return xfs_bmbt_to_iomap(ip, iomap, &imap, false);
 }
 
 const struct iomap_ops xfs_xattr_iomap_ops = {
diff --git a/fs/xfs/xfs_iomap.h b/fs/xfs/xfs_iomap.h
index c6170548831b..5c2f6aa6d78f 100644
--- a/fs/xfs/xfs_iomap.h
+++ b/fs/xfs/xfs_iomap.h
@@ -13,12 +13,10 @@ struct xfs_bmbt_irec;
 
 int xfs_iomap_write_direct(struct xfs_inode *, xfs_off_t, size_t,
 			struct xfs_bmbt_irec *, int);
-int xfs_iomap_write_allocate(struct xfs_inode *, int, xfs_off_t,
-			struct xfs_bmbt_irec *, unsigned int *);
 int xfs_iomap_write_unwritten(struct xfs_inode *, xfs_off_t, xfs_off_t, bool);
 
-void xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *,
-		struct xfs_bmbt_irec *);
+int xfs_bmbt_to_iomap(struct xfs_inode *, struct iomap *,
+		struct xfs_bmbt_irec *, bool shared);
 xfs_extlen_t xfs_eof_alignment(struct xfs_inode *ip, xfs_extlen_t extsize);
 
 static inline xfs_filblks_t
@@ -42,6 +40,7 @@ xfs_aligned_fsb_count(
 }
 
 extern const struct iomap_ops xfs_iomap_ops;
+extern const struct iomap_ops xfs_seek_iomap_ops;
 extern const struct iomap_ops xfs_xattr_iomap_ops;
 
 #endif /* __XFS_IOMAP_H__*/
diff --git a/fs/xfs/xfs_iops.c b/fs/xfs/xfs_iops.c
index f48ffd7a8d3e..ff3c1fae5357 100644
--- a/fs/xfs/xfs_iops.c
+++ b/fs/xfs/xfs_iops.c
@@ -10,30 +10,20 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
 #include "xfs_inode.h"
-#include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
 #include "xfs_acl.h"
 #include "xfs_quota.h"
-#include "xfs_error.h"
 #include "xfs_attr.h"
 #include "xfs_trans.h"
 #include "xfs_trace.h"
 #include "xfs_icache.h"
 #include "xfs_symlink.h"
-#include "xfs_da_btree.h"
 #include "xfs_dir2.h"
-#include "xfs_trans_space.h"
 #include "xfs_iomap.h"
-#include "xfs_defer.h"
 
-#include <linux/capability.h>
 #include <linux/xattr.h>
 #include <linux/posix_acl.h>
 #include <linux/security.h>
-#include <linux/iomap.h>
-#include <linux/slab.h>
 #include <linux/iversion.h>
 
 /*
@@ -191,9 +181,18 @@ xfs_generic_create(
 
 	xfs_setup_iops(ip);
 
-	if (tmpfile)
+	if (tmpfile) {
+		/*
+		 * The VFS requires that any inode fed to d_tmpfile must have
+		 * nlink == 1 so that it can decrement the nlink in d_tmpfile.
+		 * However, we created the temp file with nlink == 0 because
+		 * we're not allowed to put an inode with nlink > 0 on the
+		 * unlinked list.  Therefore we have to set nlink to 1 so that
+		 * d_tmpfile can immediately set it back to zero.
+		 */
+		set_nlink(inode, 1);
 		d_tmpfile(dentry, inode);
-	else
+	} else
 		d_instantiate(dentry, inode);
 
 	xfs_finish_inode_setup(ip);
@@ -522,6 +521,10 @@ xfs_vn_getattr(
 		}
 	}
 
+	/*
+	 * Note: If you add another clause to set an attribute flag, please
+	 * update attributes_mask below.
+	 */
 	if (ip->i_d.di_flags & XFS_DIFLAG_IMMUTABLE)
 		stat->attributes |= STATX_ATTR_IMMUTABLE;
 	if (ip->i_d.di_flags & XFS_DIFLAG_APPEND)
@@ -529,6 +532,10 @@ xfs_vn_getattr(
 	if (ip->i_d.di_flags & XFS_DIFLAG_NODUMP)
 		stat->attributes |= STATX_ATTR_NODUMP;
 
+	stat->attributes_mask |= (STATX_ATTR_IMMUTABLE |
+				  STATX_ATTR_APPEND |
+				  STATX_ATTR_NODUMP);
+
 	switch (inode->i_mode & S_IFMT) {
 	case S_IFBLK:
 	case S_IFCHR:
diff --git a/fs/xfs/xfs_itable.c b/fs/xfs/xfs_itable.c
index 942e4aa5e729..a8a06bb78ea8 100644
--- a/fs/xfs/xfs_itable.c
+++ b/fs/xfs/xfs_itable.c
@@ -14,45 +14,66 @@
 #include "xfs_btree.h"
 #include "xfs_ialloc.h"
 #include "xfs_ialloc_btree.h"
+#include "xfs_iwalk.h"
 #include "xfs_itable.h"
 #include "xfs_error.h"
-#include "xfs_trace.h"
 #include "xfs_icache.h"
+#include "xfs_health.h"
 
 /*
- * Return stat information for one inode.
- * Return 0 if ok, else errno.
+ * Bulk Stat
+ * =========
+ *
+ * Use the inode walking functions to fill out struct xfs_bulkstat for every
+ * allocated inode, then pass the stat information to some externally provided
+ * iteration function.
  */
-int
+
+struct xfs_bstat_chunk {
+	bulkstat_one_fmt_pf	formatter;
+	struct xfs_ibulk	*breq;
+	struct xfs_bulkstat	*buf;
+};
+
+/*
+ * Fill out the bulkstat info for a single inode and report it somewhere.
+ *
+ * bc->breq->lastino is effectively the inode cursor as we walk through the
+ * filesystem.  Therefore, we update it any time we need to move the cursor
+ * forward, regardless of whether or not we're sending any bstat information
+ * back to userspace.  If the inode is internal metadata or, has been freed
+ * out from under us, we just simply keep going.
+ *
+ * However, if any other type of error happens we want to stop right where we
+ * are so that userspace will call back with exact number of the bad inode and
+ * we can send back an error code.
+ *
+ * Note that if the formatter tells us there's no space left in the buffer we
+ * move the cursor forward and abort the walk.
+ */
+STATIC int
 xfs_bulkstat_one_int(
-	struct xfs_mount	*mp,		/* mount point for filesystem */
-	xfs_ino_t		ino,		/* inode to get data for */
-	void __user		*buffer,	/* buffer to place output in */
-	int			ubsize,		/* size of buffer */
-	bulkstat_one_fmt_pf	formatter,	/* formatter, copy to user */
-	int			*ubused,	/* bytes used by me */
-	int			*stat)		/* BULKSTAT_RV_... */
+	struct xfs_mount	*mp,
+	struct xfs_trans	*tp,
+	xfs_ino_t		ino,
+	struct xfs_bstat_chunk	*bc)
 {
 	struct xfs_icdinode	*dic;		/* dinode core info pointer */
 	struct xfs_inode	*ip;		/* incore inode pointer */
 	struct inode		*inode;
-	struct xfs_bstat	*buf;		/* return buffer */
-	int			error = 0;	/* error value */
+	struct xfs_bulkstat	*buf = bc->buf;
+	int			error = -EINVAL;
 
-	*stat = BULKSTAT_RV_NOTHING;
+	if (xfs_internal_inum(mp, ino))
+		goto out_advance;
 
-	if (!buffer || xfs_internal_inum(mp, ino))
-		return -EINVAL;
-
-	buf = kmem_zalloc(sizeof(*buf), KM_SLEEP | KM_MAYFAIL);
-	if (!buf)
-		return -ENOMEM;
-
-	error = xfs_iget(mp, NULL, ino,
+	error = xfs_iget(mp, tp, ino,
 			 (XFS_IGET_DONTCACHE | XFS_IGET_UNTRUSTED),
 			 XFS_ILOCK_SHARED, &ip);
+	if (error == -ENOENT || error == -EINVAL)
+		goto out_advance;
 	if (error)
-		goto out_free;
+		goto out;
 
 	ASSERT(ip != NULL);
 	ASSERT(ip->i_imap.im_blkno != 0);
@@ -63,36 +84,35 @@ xfs_bulkstat_one_int(
 	/* xfs_iget returns the following without needing
 	 * further change.
 	 */
-	buf->bs_projid_lo = dic->di_projid_lo;
-	buf->bs_projid_hi = dic->di_projid_hi;
+	buf->bs_projectid = xfs_get_projid(ip);
 	buf->bs_ino = ino;
 	buf->bs_uid = dic->di_uid;
 	buf->bs_gid = dic->di_gid;
 	buf->bs_size = dic->di_size;
 
 	buf->bs_nlink = inode->i_nlink;
-	buf->bs_atime.tv_sec = inode->i_atime.tv_sec;
-	buf->bs_atime.tv_nsec = inode->i_atime.tv_nsec;
-	buf->bs_mtime.tv_sec = inode->i_mtime.tv_sec;
-	buf->bs_mtime.tv_nsec = inode->i_mtime.tv_nsec;
-	buf->bs_ctime.tv_sec = inode->i_ctime.tv_sec;
-	buf->bs_ctime.tv_nsec = inode->i_ctime.tv_nsec;
+	buf->bs_atime = inode->i_atime.tv_sec;
+	buf->bs_atime_nsec = inode->i_atime.tv_nsec;
+	buf->bs_mtime = inode->i_mtime.tv_sec;
+	buf->bs_mtime_nsec = inode->i_mtime.tv_nsec;
+	buf->bs_ctime = inode->i_ctime.tv_sec;
+	buf->bs_ctime_nsec = inode->i_ctime.tv_nsec;
+	buf->bs_btime = dic->di_crtime.t_sec;
+	buf->bs_btime_nsec = dic->di_crtime.t_nsec;
 	buf->bs_gen = inode->i_generation;
 	buf->bs_mode = inode->i_mode;
 
 	buf->bs_xflags = xfs_ip2xflags(ip);
-	buf->bs_extsize = dic->di_extsize << mp->m_sb.sb_blocklog;
+	buf->bs_extsize_blks = dic->di_extsize;
 	buf->bs_extents = dic->di_nextents;
-	memset(buf->bs_pad, 0, sizeof(buf->bs_pad));
-	buf->bs_dmevmask = dic->di_dmevmask;
-	buf->bs_dmstate = dic->di_dmstate;
+	xfs_bulkstat_health(ip, buf);
 	buf->bs_aextents = dic->di_anextents;
 	buf->bs_forkoff = XFS_IFORK_BOFF(ip);
+	buf->bs_version = XFS_BULKSTAT_VERSION_V5;
 
 	if (dic->di_version == 3) {
 		if (dic->di_flags2 & XFS_DIFLAG2_COWEXTSIZE)
-			buf->bs_cowextsize = dic->di_cowextsize <<
-					mp->m_sb.sb_blocklog;
+			buf->bs_cowextsize_blks = dic->di_cowextsize;
 	}
 
 	switch (dic->di_format) {
@@ -116,385 +136,121 @@ xfs_bulkstat_one_int(
 	xfs_iunlock(ip, XFS_ILOCK_SHARED);
 	xfs_irele(ip);
 
-	error = formatter(buffer, ubsize, ubused, buf);
-	if (!error)
-		*stat = BULKSTAT_RV_DIDONE;
+	error = bc->formatter(bc->breq, buf);
+	if (error == XFS_IBULK_ABORT)
+		goto out_advance;
+	if (error)
+		goto out;
 
- out_free:
-	kmem_free(buf);
+out_advance:
+	/*
+	 * Advance the cursor to the inode that comes after the one we just
+	 * looked at.  We want the caller to move along if the bulkstat
+	 * information was copied successfully; if we tried to grab the inode
+	 * but it's no longer allocated; or if it's internal metadata.
+	 */
+	bc->breq->startino = ino + 1;
+out:
 	return error;
 }
 
-/* Return 0 on success or positive error */
-STATIC int
-xfs_bulkstat_one_fmt(
-	void			__user *ubuffer,
-	int			ubsize,
-	int			*ubused,
-	const xfs_bstat_t	*buffer)
-{
-	if (ubsize < sizeof(*buffer))
-		return -ENOMEM;
-	if (copy_to_user(ubuffer, buffer, sizeof(*buffer)))
-		return -EFAULT;
-	if (ubused)
-		*ubused = sizeof(*buffer);
-	return 0;
-}
-
+/* Bulkstat a single inode. */
 int
 xfs_bulkstat_one(
-	xfs_mount_t	*mp,		/* mount point for filesystem */
-	xfs_ino_t	ino,		/* inode number to get data for */
-	void		__user *buffer,	/* buffer to place output in */
-	int		ubsize,		/* size of buffer */
-	int		*ubused,	/* bytes used by me */
-	int		*stat)		/* BULKSTAT_RV_... */
+	struct xfs_ibulk	*breq,
+	bulkstat_one_fmt_pf	formatter)
 {
-	return xfs_bulkstat_one_int(mp, ino, buffer, ubsize,
-				    xfs_bulkstat_one_fmt, ubused, stat);
-}
+	struct xfs_bstat_chunk	bc = {
+		.formatter	= formatter,
+		.breq		= breq,
+	};
+	int			error;
 
-/*
- * Loop over all clusters in a chunk for a given incore inode allocation btree
- * record.  Do a readahead if there are any allocated inodes in that cluster.
- */
-STATIC void
-xfs_bulkstat_ichunk_ra(
-	struct xfs_mount		*mp,
-	xfs_agnumber_t			agno,
-	struct xfs_inobt_rec_incore	*irec)
-{
-	xfs_agblock_t			agbno;
-	struct blk_plug			plug;
-	int				i;	/* inode chunk index */
-
-	agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
-
-	blk_start_plug(&plug);
-	for (i = 0; i < XFS_INODES_PER_CHUNK;
-	     i += mp->m_inodes_per_cluster, agbno += mp->m_blocks_per_cluster) {
-		if (xfs_inobt_maskn(i, mp->m_inodes_per_cluster) &
-		    ~irec->ir_free) {
-			xfs_btree_reada_bufs(mp, agno, agbno,
-					mp->m_blocks_per_cluster,
-					&xfs_inode_buf_ops);
-		}
-	}
-	blk_finish_plug(&plug);
-}
+	ASSERT(breq->icount == 1);
 
-/*
- * Lookup the inode chunk that the given inode lives in and then get the record
- * if we found the chunk.  If the inode was not the last in the chunk and there
- * are some left allocated, update the data for the pointed-to record as well as
- * return the count of grabbed inodes.
- */
-STATIC int
-xfs_bulkstat_grab_ichunk(
-	struct xfs_btree_cur		*cur,	/* btree cursor */
-	xfs_agino_t			agino,	/* starting inode of chunk */
-	int				*icount,/* return # of inodes grabbed */
-	struct xfs_inobt_rec_incore	*irec)	/* btree record */
-{
-	int				idx;	/* index into inode chunk */
-	int				stat;
-	int				error = 0;
-
-	/* Lookup the inode chunk that this inode lives in */
-	error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_LE, &stat);
-	if (error)
-		return error;
-	if (!stat) {
-		*icount = 0;
-		return error;
-	}
+	bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
+			KM_SLEEP | KM_MAYFAIL);
+	if (!bc.buf)
+		return -ENOMEM;
 
-	/* Get the record, should always work */
-	error = xfs_inobt_get_rec(cur, irec, &stat);
-	if (error)
-		return error;
-	XFS_WANT_CORRUPTED_RETURN(cur->bc_mp, stat == 1);
+	error = xfs_bulkstat_one_int(breq->mp, NULL, breq->startino, &bc);
 
-	/* Check if the record contains the inode in request */
-	if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino) {
-		*icount = 0;
-		return 0;
-	}
+	kmem_free(bc.buf);
 
-	idx = agino - irec->ir_startino + 1;
-	if (idx < XFS_INODES_PER_CHUNK &&
-	    (xfs_inobt_maskn(idx, XFS_INODES_PER_CHUNK - idx) & ~irec->ir_free)) {
-		int	i;
-
-		/* We got a right chunk with some left inodes allocated at it.
-		 * Grab the chunk record.  Mark all the uninteresting inodes
-		 * free -- because they're before our start point.
-		 */
-		for (i = 0; i < idx; i++) {
-			if (XFS_INOBT_MASK(i) & ~irec->ir_free)
-				irec->ir_freecount++;
-		}
-
-		irec->ir_free |= xfs_inobt_maskn(0, idx);
-		*icount = irec->ir_count - irec->ir_freecount;
-	}
+	/*
+	 * If we reported one inode to userspace then we abort because we hit
+	 * the end of the buffer.  Don't leak that back to userspace.
+	 */
+	if (error == XFS_IWALK_ABORT)
+		error = 0;
 
-	return 0;
+	return error;
 }
 
-#define XFS_BULKSTAT_UBLEFT(ubleft)	((ubleft) >= statstruct_size)
-
-struct xfs_bulkstat_agichunk {
-	char		__user **ac_ubuffer;/* pointer into user's buffer */
-	int		ac_ubleft;	/* bytes left in user's buffer */
-	int		ac_ubelem;	/* spaces used in user's buffer */
-};
-
-/*
- * Process inodes in chunk with a pointer to a formatter function
- * that will iget the inode and fill in the appropriate structure.
- */
 static int
-xfs_bulkstat_ag_ichunk(
-	struct xfs_mount		*mp,
-	xfs_agnumber_t			agno,
-	struct xfs_inobt_rec_incore	*irbp,
-	bulkstat_one_pf			formatter,
-	size_t				statstruct_size,
-	struct xfs_bulkstat_agichunk	*acp,
-	xfs_agino_t			*last_agino)
+xfs_bulkstat_iwalk(
+	struct xfs_mount	*mp,
+	struct xfs_trans	*tp,
+	xfs_ino_t		ino,
+	void			*data)
 {
-	char				__user **ubufp = acp->ac_ubuffer;
-	int				chunkidx;
-	int				error = 0;
-	xfs_agino_t			agino = irbp->ir_startino;
-
-	for (chunkidx = 0; chunkidx < XFS_INODES_PER_CHUNK;
-	     chunkidx++, agino++) {
-		int		fmterror;
-		int		ubused;
-
-		/* inode won't fit in buffer, we are done */
-		if (acp->ac_ubleft < statstruct_size)
-			break;
-
-		/* Skip if this inode is free */
-		if (XFS_INOBT_MASK(chunkidx) & irbp->ir_free)
-			continue;
-
-		/* Get the inode and fill in a single buffer */
-		ubused = statstruct_size;
-		error = formatter(mp, XFS_AGINO_TO_INO(mp, agno, agino),
-				  *ubufp, acp->ac_ubleft, &ubused, &fmterror);
-
-		if (fmterror == BULKSTAT_RV_GIVEUP ||
-		    (error && error != -ENOENT && error != -EINVAL)) {
-			acp->ac_ubleft = 0;
-			ASSERT(error);
-			break;
-		}
-
-		/* be careful not to leak error if at end of chunk */
-		if (fmterror == BULKSTAT_RV_NOTHING || error) {
-			error = 0;
-			continue;
-		}
-
-		*ubufp += ubused;
-		acp->ac_ubleft -= ubused;
-		acp->ac_ubelem++;
-	}
-
-	/*
-	 * Post-update *last_agino. At this point, agino will always point one
-	 * inode past the last inode we processed successfully. Hence we
-	 * substract that inode when setting the *last_agino cursor so that we
-	 * return the correct cookie to userspace. On the next bulkstat call,
-	 * the inode under the lastino cookie will be skipped as we have already
-	 * processed it here.
-	 */
-	*last_agino = agino - 1;
+	int			error;
 
+	error = xfs_bulkstat_one_int(mp, tp, ino, data);
+	/* bulkstat just skips over missing inodes */
+	if (error == -ENOENT || error == -EINVAL)
+		return 0;
 	return error;
 }
 
 /*
- * Return stat information in bulk (by-inode) for the filesystem.
+ * Check the incoming lastino parameter.
+ *
+ * We allow any inode value that could map to physical space inside the
+ * filesystem because if there are no inodes there, bulkstat moves on to the
+ * next chunk.  In other words, the magic agino value of zero takes us to the
+ * first chunk in the AG, and an agino value past the end of the AG takes us to
+ * the first chunk in the next AG.
+ *
+ * Therefore we can end early if the requested inode is beyond the end of the
+ * filesystem or doesn't map properly.
  */
-int					/* error status */
-xfs_bulkstat(
-	xfs_mount_t		*mp,	/* mount point for filesystem */
-	xfs_ino_t		*lastinop, /* last inode returned */
-	int			*ubcountp, /* size of buffer/count returned */
-	bulkstat_one_pf		formatter, /* func that'd fill a single buf */
-	size_t			statstruct_size, /* sizeof struct filling */
-	char			__user *ubuffer, /* buffer with inode stats */
-	int			*done)	/* 1 if there are more stats to get */
+static inline bool
+xfs_bulkstat_already_done(
+	struct xfs_mount	*mp,
+	xfs_ino_t		startino)
 {
-	xfs_buf_t		*agbp;	/* agi header buffer */
-	xfs_agino_t		agino;	/* inode # in allocation group */
-	xfs_agnumber_t		agno;	/* allocation group number */
-	xfs_btree_cur_t		*cur;	/* btree cursor for ialloc btree */
-	xfs_inobt_rec_incore_t	*irbuf;	/* start of irec buffer */
-	int			nirbuf;	/* size of irbuf */
-	int			ubcount; /* size of user's buffer */
-	struct xfs_bulkstat_agichunk ac;
-	int			error = 0;
+	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, startino);
+	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, startino);
 
-	/*
-	 * Get the last inode value, see if there's nothing to do.
-	 */
-	agno = XFS_INO_TO_AGNO(mp, *lastinop);
-	agino = XFS_INO_TO_AGINO(mp, *lastinop);
-	if (agno >= mp->m_sb.sb_agcount ||
-	    *lastinop != XFS_AGINO_TO_INO(mp, agno, agino)) {
-		*done = 1;
-		*ubcountp = 0;
-		return 0;
-	}
+	return agno >= mp->m_sb.sb_agcount ||
+	       startino != XFS_AGINO_TO_INO(mp, agno, agino);
+}
 
-	ubcount = *ubcountp; /* statstruct's */
-	ac.ac_ubuffer = &ubuffer;
-	ac.ac_ubleft = ubcount * statstruct_size; /* bytes */;
-	ac.ac_ubelem = 0;
+/* Return stat information in bulk (by-inode) for the filesystem. */
+int
+xfs_bulkstat(
+	struct xfs_ibulk	*breq,
+	bulkstat_one_fmt_pf	formatter)
+{
+	struct xfs_bstat_chunk	bc = {
+		.formatter	= formatter,
+		.breq		= breq,
+	};
+	int			error;
 
-	*ubcountp = 0;
-	*done = 0;
+	if (xfs_bulkstat_already_done(breq->mp, breq->startino))
+		return 0;
 
-	irbuf = kmem_zalloc_large(PAGE_SIZE * 4, KM_SLEEP);
-	if (!irbuf)
+	bc.buf = kmem_zalloc(sizeof(struct xfs_bulkstat),
+			KM_SLEEP | KM_MAYFAIL);
+	if (!bc.buf)
 		return -ENOMEM;
-	nirbuf = (PAGE_SIZE * 4) / sizeof(*irbuf);
 
-	/*
-	 * Loop over the allocation groups, starting from the last
-	 * inode returned; 0 means start of the allocation group.
-	 */
-	while (agno < mp->m_sb.sb_agcount) {
-		struct xfs_inobt_rec_incore	*irbp = irbuf;
-		struct xfs_inobt_rec_incore	*irbufend = irbuf + nirbuf;
-		bool				end_of_ag = false;
-		int				icount = 0;
-		int				stat;
-
-		error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
-		if (error)
-			break;
-		/*
-		 * Allocate and initialize a btree cursor for ialloc btree.
-		 */
-		cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
-					    XFS_BTNUM_INO);
-		if (agino > 0) {
-			/*
-			 * In the middle of an allocation group, we need to get
-			 * the remainder of the chunk we're in.
-			 */
-			struct xfs_inobt_rec_incore	r;
-
-			error = xfs_bulkstat_grab_ichunk(cur, agino, &icount, &r);
-			if (error)
-				goto del_cursor;
-			if (icount) {
-				irbp->ir_startino = r.ir_startino;
-				irbp->ir_holemask = r.ir_holemask;
-				irbp->ir_count = r.ir_count;
-				irbp->ir_freecount = r.ir_freecount;
-				irbp->ir_free = r.ir_free;
-				irbp++;
-			}
-			/* Increment to the next record */
-			error = xfs_btree_increment(cur, 0, &stat);
-		} else {
-			/* Start of ag.  Lookup the first inode chunk */
-			error = xfs_inobt_lookup(cur, 0, XFS_LOOKUP_GE, &stat);
-		}
-		if (error || stat == 0) {
-			end_of_ag = true;
-			goto del_cursor;
-		}
-
-		/*
-		 * Loop through inode btree records in this ag,
-		 * until we run out of inodes or space in the buffer.
-		 */
-		while (irbp < irbufend && icount < ubcount) {
-			struct xfs_inobt_rec_incore	r;
-
-			error = xfs_inobt_get_rec(cur, &r, &stat);
-			if (error || stat == 0) {
-				end_of_ag = true;
-				goto del_cursor;
-			}
-
-			/*
-			 * If this chunk has any allocated inodes, save it.
-			 * Also start read-ahead now for this chunk.
-			 */
-			if (r.ir_freecount < r.ir_count) {
-				xfs_bulkstat_ichunk_ra(mp, agno, &r);
-				irbp->ir_startino = r.ir_startino;
-				irbp->ir_holemask = r.ir_holemask;
-				irbp->ir_count = r.ir_count;
-				irbp->ir_freecount = r.ir_freecount;
-				irbp->ir_free = r.ir_free;
-				irbp++;
-				icount += r.ir_count - r.ir_freecount;
-			}
-			error = xfs_btree_increment(cur, 0, &stat);
-			if (error || stat == 0) {
-				end_of_ag = true;
-				goto del_cursor;
-			}
-			cond_resched();
-		}
-
-		/*
-		 * Drop the btree buffers and the agi buffer as we can't hold any
-		 * of the locks these represent when calling iget. If there is a
-		 * pending error, then we are done.
-		 */
-del_cursor:
-		xfs_btree_del_cursor(cur, error);
-		xfs_buf_relse(agbp);
-		if (error)
-			break;
-		/*
-		 * Now format all the good inodes into the user's buffer. The
-		 * call to xfs_bulkstat_ag_ichunk() sets up the agino pointer
-		 * for the next loop iteration.
-		 */
-		irbufend = irbp;
-		for (irbp = irbuf;
-		     irbp < irbufend && ac.ac_ubleft >= statstruct_size;
-		     irbp++) {
-			error = xfs_bulkstat_ag_ichunk(mp, agno, irbp,
-					formatter, statstruct_size, &ac,
-					&agino);
-			if (error)
-				break;
-
-			cond_resched();
-		}
-
-		/*
-		 * If we've run out of space or had a formatting error, we
-		 * are now done
-		 */
-		if (ac.ac_ubleft < statstruct_size || error)
-			break;
-
-		if (end_of_ag) {
-			agno++;
-			agino = 0;
-		}
-	}
-	/*
-	 * Done, we're either out of filesystem or space to put the data.
-	 */
-	kmem_free(irbuf);
-	*ubcountp = ac.ac_ubelem;
+	error = xfs_iwalk(breq->mp, NULL, breq->startino, breq->flags,
+			xfs_bulkstat_iwalk, breq->icount, &bc);
+
+	kmem_free(bc.buf);
 
 	/*
 	 * We found some inodes, so clear the error status and return them.
@@ -503,135 +259,136 @@ del_cursor:
 	 * triggered again and propagated to userspace as there will be no
 	 * formatted inodes in the buffer.
 	 */
-	if (ac.ac_ubelem)
+	if (breq->ocount > 0)
 		error = 0;
 
-	/*
-	 * If we ran out of filesystem, lastino will point off the end of
-	 * the filesystem so the next call will return immediately.
-	 */
-	*lastinop = XFS_AGINO_TO_INO(mp, agno, agino);
-	if (agno >= mp->m_sb.sb_agcount)
-		*done = 1;
-
 	return error;
 }
 
-int
-xfs_inumbers_fmt(
-	void			__user *ubuffer, /* buffer to write to */
-	const struct xfs_inogrp	*buffer,	/* buffer to read from */
-	long			count,		/* # of elements to read */
-	long			*written)	/* # of bytes written */
+/* Convert bulkstat (v5) to bstat (v1). */
+void
+xfs_bulkstat_to_bstat(
+	struct xfs_mount		*mp,
+	struct xfs_bstat		*bs1,
+	const struct xfs_bulkstat	*bstat)
 {
-	if (copy_to_user(ubuffer, buffer, count * sizeof(*buffer)))
-		return -EFAULT;
-	*written = count * sizeof(*buffer);
-	return 0;
+	memset(bs1, 0, sizeof(struct xfs_bstat));
+	bs1->bs_ino = bstat->bs_ino;
+	bs1->bs_mode = bstat->bs_mode;
+	bs1->bs_nlink = bstat->bs_nlink;
+	bs1->bs_uid = bstat->bs_uid;
+	bs1->bs_gid = bstat->bs_gid;
+	bs1->bs_rdev = bstat->bs_rdev;
+	bs1->bs_blksize = bstat->bs_blksize;
+	bs1->bs_size = bstat->bs_size;
+	bs1->bs_atime.tv_sec = bstat->bs_atime;
+	bs1->bs_mtime.tv_sec = bstat->bs_mtime;
+	bs1->bs_ctime.tv_sec = bstat->bs_ctime;
+	bs1->bs_atime.tv_nsec = bstat->bs_atime_nsec;
+	bs1->bs_mtime.tv_nsec = bstat->bs_mtime_nsec;
+	bs1->bs_ctime.tv_nsec = bstat->bs_ctime_nsec;
+	bs1->bs_blocks = bstat->bs_blocks;
+	bs1->bs_xflags = bstat->bs_xflags;
+	bs1->bs_extsize = XFS_FSB_TO_B(mp, bstat->bs_extsize_blks);
+	bs1->bs_extents = bstat->bs_extents;
+	bs1->bs_gen = bstat->bs_gen;
+	bs1->bs_projid_lo = bstat->bs_projectid & 0xFFFF;
+	bs1->bs_forkoff = bstat->bs_forkoff;
+	bs1->bs_projid_hi = bstat->bs_projectid >> 16;
+	bs1->bs_sick = bstat->bs_sick;
+	bs1->bs_checked = bstat->bs_checked;
+	bs1->bs_cowextsize = XFS_FSB_TO_B(mp, bstat->bs_cowextsize_blks);
+	bs1->bs_dmevmask = 0;
+	bs1->bs_dmstate = 0;
+	bs1->bs_aextents = bstat->bs_aextents;
+}
+
+struct xfs_inumbers_chunk {
+	inumbers_fmt_pf		formatter;
+	struct xfs_ibulk	*breq;
+};
+
+/*
+ * INUMBERS
+ * ========
+ * This is how we export inode btree records to userspace, so that XFS tools
+ * can figure out where inodes are allocated.
+ */
+
+/*
+ * Format the inode group structure and report it somewhere.
+ *
+ * Similar to xfs_bulkstat_one_int, lastino is the inode cursor as we walk
+ * through the filesystem so we move it forward unless there was a runtime
+ * error.  If the formatter tells us the buffer is now full we also move the
+ * cursor forward and abort the walk.
+ */
+STATIC int
+xfs_inumbers_walk(
+	struct xfs_mount	*mp,
+	struct xfs_trans	*tp,
+	xfs_agnumber_t		agno,
+	const struct xfs_inobt_rec_incore *irec,
+	void			*data)
+{
+	struct xfs_inumbers	inogrp = {
+		.xi_startino	= XFS_AGINO_TO_INO(mp, agno, irec->ir_startino),
+		.xi_alloccount	= irec->ir_count - irec->ir_freecount,
+		.xi_allocmask	= ~irec->ir_free,
+		.xi_version	= XFS_INUMBERS_VERSION_V5,
+	};
+	struct xfs_inumbers_chunk *ic = data;
+	int			error;
+
+	error = ic->formatter(ic->breq, &inogrp);
+	if (error && error != XFS_IBULK_ABORT)
+		return error;
+
+	ic->breq->startino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino) +
+			XFS_INODES_PER_CHUNK;
+	return error;
 }
 
 /*
  * Return inode number table for the filesystem.
  */
-int					/* error status */
+int
 xfs_inumbers(
-	struct xfs_mount	*mp,/* mount point for filesystem */
-	xfs_ino_t		*lastino,/* last inode returned */
-	int			*count,/* size of buffer/count returned */
-	void			__user *ubuffer,/* buffer with inode descriptions */
+	struct xfs_ibulk	*breq,
 	inumbers_fmt_pf		formatter)
 {
-	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, *lastino);
-	xfs_agino_t		agino = XFS_INO_TO_AGINO(mp, *lastino);
-	struct xfs_btree_cur	*cur = NULL;
-	struct xfs_buf		*agbp = NULL;
-	struct xfs_inogrp	*buffer;
-	int			bcount;
-	int			left = *count;
-	int			bufidx = 0;
+	struct xfs_inumbers_chunk ic = {
+		.formatter	= formatter,
+		.breq		= breq,
+	};
 	int			error = 0;
 
-	*count = 0;
-	if (agno >= mp->m_sb.sb_agcount ||
-	    *lastino != XFS_AGINO_TO_INO(mp, agno, agino))
-		return error;
+	if (xfs_bulkstat_already_done(breq->mp, breq->startino))
+		return 0;
 
-	bcount = min(left, (int)(PAGE_SIZE / sizeof(*buffer)));
-	buffer = kmem_zalloc(bcount * sizeof(*buffer), KM_SLEEP);
-	do {
-		struct xfs_inobt_rec_incore	r;
-		int				stat;
-
-		if (!agbp) {
-			error = xfs_ialloc_read_agi(mp, NULL, agno, &agbp);
-			if (error)
-				break;
-
-			cur = xfs_inobt_init_cursor(mp, NULL, agbp, agno,
-						    XFS_BTNUM_INO);
-			error = xfs_inobt_lookup(cur, agino, XFS_LOOKUP_GE,
-						 &stat);
-			if (error)
-				break;
-			if (!stat)
-				goto next_ag;
-		}
-
-		error = xfs_inobt_get_rec(cur, &r, &stat);
-		if (error)
-			break;
-		if (!stat)
-			goto next_ag;
-
-		agino = r.ir_startino + XFS_INODES_PER_CHUNK - 1;
-		buffer[bufidx].xi_startino =
-			XFS_AGINO_TO_INO(mp, agno, r.ir_startino);
-		buffer[bufidx].xi_alloccount = r.ir_count - r.ir_freecount;
-		buffer[bufidx].xi_allocmask = ~r.ir_free;
-		if (++bufidx == bcount) {
-			long	written;
-
-			error = formatter(ubuffer, buffer, bufidx, &written);
-			if (error)
-				break;
-			ubuffer += written;
-			*count += bufidx;
-			bufidx = 0;
-		}
-		if (!--left)
-			break;
-
-		error = xfs_btree_increment(cur, 0, &stat);
-		if (error)
-			break;
-		if (stat)
-			continue;
-
-next_ag:
-		xfs_btree_del_cursor(cur, XFS_BTREE_ERROR);
-		cur = NULL;
-		xfs_buf_relse(agbp);
-		agbp = NULL;
-		agino = 0;
-		agno++;
-	} while (agno < mp->m_sb.sb_agcount);
-
-	if (!error) {
-		if (bufidx) {
-			long	written;
-
-			error = formatter(ubuffer, buffer, bufidx, &written);
-			if (!error)
-				*count += bufidx;
-		}
-		*lastino = XFS_AGINO_TO_INO(mp, agno, agino);
-	}
+	error = xfs_inobt_walk(breq->mp, NULL, breq->startino, breq->flags,
+			xfs_inumbers_walk, breq->icount, &ic);
 
-	kmem_free(buffer);
-	if (cur)
-		xfs_btree_del_cursor(cur, error);
-	if (agbp)
-		xfs_buf_relse(agbp);
+	/*
+	 * We found some inode groups, so clear the error status and return
+	 * them.  The lastino pointer will point directly at the inode that
+	 * triggered any error that occurred, so on the next call the error
+	 * will be triggered again and propagated to userspace as there will be
+	 * no formatted inode groups in the buffer.
+	 */
+	if (breq->ocount > 0)
+		error = 0;
 
 	return error;
 }
+
+/* Convert an inumbers (v5) struct to a inogrp (v1) struct. */
+void
+xfs_inumbers_to_inogrp(
+	struct xfs_inogrp		*ig1,
+	const struct xfs_inumbers	*ig)
+{
+	ig1->xi_startino = ig->xi_startino;
+	ig1->xi_alloccount = ig->xi_alloccount;
+	ig1->xi_allocmask = ig->xi_allocmask;
+}
diff --git a/fs/xfs/xfs_itable.h b/fs/xfs/xfs_itable.h
index 8a822285b671..e90c1fc5b981 100644
--- a/fs/xfs/xfs_itable.h
+++ b/fs/xfs/xfs_itable.h
@@ -5,83 +5,55 @@
 #ifndef __XFS_ITABLE_H__
 #define	__XFS_ITABLE_H__
 
-/*
- * xfs_bulkstat() is used to fill in xfs_bstat structures as well as dm_stat
- * structures (by the dmi library). This is a pointer to a formatter function
- * that will iget the inode and fill in the appropriate structure.
- * see xfs_bulkstat_one() and xfs_dm_bulkstat_one() in dmapi_xfs.c
- */
-typedef int (*bulkstat_one_pf)(struct xfs_mount	*mp,
-			       xfs_ino_t	ino,
-			       void		__user *buffer,
-			       int		ubsize,
-			       int		*ubused,
-			       int		*stat);
+/* In-memory representation of a userspace request for batch inode data. */
+struct xfs_ibulk {
+	struct xfs_mount	*mp;
+	void __user		*ubuffer; /* user output buffer */
+	xfs_ino_t		startino; /* start with this inode */
+	unsigned int		icount;   /* number of elements in ubuffer */
+	unsigned int		ocount;   /* number of records returned */
+	unsigned int		flags;    /* see XFS_IBULK_FLAG_* */
+};
+
+/* Only iterate within the same AG as startino */
+#define XFS_IBULK_SAME_AG	(XFS_IWALK_SAME_AG)
+
+/* Return value that means we want to abort the walk. */
+#define XFS_IBULK_ABORT		(XFS_IWALK_ABORT)
 
 /*
- * Values for stat return value.
+ * Advance the user buffer pointer by one record of the given size.  If the
+ * buffer is now full, return the appropriate error code.
  */
-#define BULKSTAT_RV_NOTHING	0
-#define BULKSTAT_RV_DIDONE	1
-#define BULKSTAT_RV_GIVEUP	2
+static inline int
+xfs_ibulk_advance(
+	struct xfs_ibulk	*breq,
+	size_t			bytes)
+{
+	char __user		*b = breq->ubuffer;
+
+	breq->ubuffer = b + bytes;
+	breq->ocount++;
+	return breq->ocount == breq->icount ? XFS_IBULK_ABORT : 0;
+}
 
 /*
  * Return stat information in bulk (by-inode) for the filesystem.
  */
-int					/* error status */
-xfs_bulkstat(
-	xfs_mount_t	*mp,		/* mount point for filesystem */
-	xfs_ino_t	*lastino,	/* last inode returned */
-	int		*count,		/* size of buffer/count returned */
-	bulkstat_one_pf formatter,	/* func that'd fill a single buf */
-	size_t		statstruct_size,/* sizeof struct that we're filling */
-	char		__user *ubuffer,/* buffer with inode stats */
-	int		*done);		/* 1 if there are more stats to get */
-
-typedef int (*bulkstat_one_fmt_pf)(  /* used size in bytes or negative error */
-	void			__user *ubuffer, /* buffer to write to */
-	int			ubsize,		 /* remaining user buffer sz */
-	int			*ubused,	 /* bytes used by formatter */
-	const xfs_bstat_t	*buffer);        /* buffer to read from */
-
-int
-xfs_bulkstat_one_int(
-	xfs_mount_t		*mp,
-	xfs_ino_t		ino,
-	void			__user *buffer,
-	int			ubsize,
-	bulkstat_one_fmt_pf	formatter,
-	int			*ubused,
-	int			*stat);
 
-int
-xfs_bulkstat_one(
-	xfs_mount_t		*mp,
-	xfs_ino_t		ino,
-	void			__user *buffer,
-	int			ubsize,
-	int			*ubused,
-	int			*stat);
+typedef int (*bulkstat_one_fmt_pf)(struct xfs_ibulk *breq,
+		const struct xfs_bulkstat *bstat);
 
-typedef int (*inumbers_fmt_pf)(
-	void			__user *ubuffer, /* buffer to write to */
-	const xfs_inogrp_t	*buffer,	/* buffer to read from */
-	long			count,		/* # of elements to read */
-	long			*written);	/* # of bytes written */
+int xfs_bulkstat_one(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
+int xfs_bulkstat(struct xfs_ibulk *breq, bulkstat_one_fmt_pf formatter);
+void xfs_bulkstat_to_bstat(struct xfs_mount *mp, struct xfs_bstat *bs1,
+		const struct xfs_bulkstat *bstat);
 
-int
-xfs_inumbers_fmt(
-	void			__user *ubuffer, /* buffer to write to */
-	const xfs_inogrp_t	*buffer,	/* buffer to read from */
-	long			count,		/* # of elements to read */
-	long			*written);	/* # of bytes written */
+typedef int (*inumbers_fmt_pf)(struct xfs_ibulk *breq,
+		const struct xfs_inumbers *igrp);
 
-int					/* error status */
-xfs_inumbers(
-	xfs_mount_t		*mp,	/* mount point for filesystem */
-	xfs_ino_t		*last,	/* last inode returned */
-	int			*count,	/* size of buffer/count returned */
-	void			__user *buffer, /* buffer with inode info */
-	inumbers_fmt_pf		formatter);
+int xfs_inumbers(struct xfs_ibulk *breq, inumbers_fmt_pf formatter);
+void xfs_inumbers_to_inogrp(struct xfs_inogrp *ig1,
+		const struct xfs_inumbers *ig);
 
 #endif	/* __XFS_ITABLE_H__ */
diff --git a/fs/xfs/xfs_iwalk.c b/fs/xfs/xfs_iwalk.c
new file mode 100644
index 000000000000..8c7d727149ea
--- /dev/null
+++ b/fs/xfs/xfs_iwalk.c
@@ -0,0 +1,720 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_inode.h"
+#include "xfs_btree.h"
+#include "xfs_ialloc.h"
+#include "xfs_ialloc_btree.h"
+#include "xfs_iwalk.h"
+#include "xfs_error.h"
+#include "xfs_trace.h"
+#include "xfs_icache.h"
+#include "xfs_health.h"
+#include "xfs_trans.h"
+#include "xfs_pwork.h"
+
+/*
+ * Walking Inodes in the Filesystem
+ * ================================
+ *
+ * This iterator function walks a subset of filesystem inodes in increasing
+ * order from @startino until there are no more inodes.  For each allocated
+ * inode it finds, it calls a walk function with the relevant inode number and
+ * a pointer to caller-provided data.  The walk function can return the usual
+ * negative error code to stop the iteration; 0 to continue the iteration; or
+ * XFS_IWALK_ABORT to stop the iteration.  This return value is returned to the
+ * caller.
+ *
+ * Internally, we allow the walk function to do anything, which means that we
+ * cannot maintain the inobt cursor or our lock on the AGI buffer.  We
+ * therefore cache the inobt records in kernel memory and only call the walk
+ * function when our memory buffer is full.  @nr_recs is the number of records
+ * that we've cached, and @sz_recs is the size of our cache.
+ *
+ * It is the responsibility of the walk function to ensure it accesses
+ * allocated inodes, as the inobt records may be stale by the time they are
+ * acted upon.
+ */
+
+struct xfs_iwalk_ag {
+	/* parallel work control data; will be null if single threaded */
+	struct xfs_pwork		pwork;
+
+	struct xfs_mount		*mp;
+	struct xfs_trans		*tp;
+
+	/* Where do we start the traversal? */
+	xfs_ino_t			startino;
+
+	/* Array of inobt records we cache. */
+	struct xfs_inobt_rec_incore	*recs;
+
+	/* Number of entries allocated for the @recs array. */
+	unsigned int			sz_recs;
+
+	/* Number of entries in the @recs array that are in use. */
+	unsigned int			nr_recs;
+
+	/* Inode walk function and data pointer. */
+	xfs_iwalk_fn			iwalk_fn;
+	xfs_inobt_walk_fn		inobt_walk_fn;
+	void				*data;
+
+	/*
+	 * Make it look like the inodes up to startino are free so that
+	 * bulkstat can start its inode iteration at the correct place without
+	 * needing to special case everywhere.
+	 */
+	unsigned int			trim_start:1;
+
+	/* Skip empty inobt records? */
+	unsigned int			skip_empty:1;
+};
+
+/*
+ * Loop over all clusters in a chunk for a given incore inode allocation btree
+ * record.  Do a readahead if there are any allocated inodes in that cluster.
+ */
+STATIC void
+xfs_iwalk_ichunk_ra(
+	struct xfs_mount		*mp,
+	xfs_agnumber_t			agno,
+	struct xfs_inobt_rec_incore	*irec)
+{
+	struct xfs_ino_geometry		*igeo = M_IGEO(mp);
+	xfs_agblock_t			agbno;
+	struct blk_plug			plug;
+	int				i;	/* inode chunk index */
+
+	agbno = XFS_AGINO_TO_AGBNO(mp, irec->ir_startino);
+
+	blk_start_plug(&plug);
+	for (i = 0; i < XFS_INODES_PER_CHUNK; i += igeo->inodes_per_cluster) {
+		xfs_inofree_t	imask;
+
+		imask = xfs_inobt_maskn(i, igeo->inodes_per_cluster);
+		if (imask & ~irec->ir_free) {
+			xfs_btree_reada_bufs(mp, agno, agbno,
+					igeo->blocks_per_cluster,
+					&xfs_inode_buf_ops);
+		}
+		agbno += igeo->blocks_per_cluster;
+	}
+	blk_finish_plug(&plug);
+}
+
+/*
+ * Set the bits in @irec's free mask that correspond to the inodes before
+ * @agino so that we skip them.  This is how we restart an inode walk that was
+ * interrupted in the middle of an inode record.
+ */
+STATIC void
+xfs_iwalk_adjust_start(
+	xfs_agino_t			agino,	/* starting inode of chunk */
+	struct xfs_inobt_rec_incore	*irec)	/* btree record */
+{
+	int				idx;	/* index into inode chunk */
+	int				i;
+
+	idx = agino - irec->ir_startino;
+
+	/*
+	 * We got a right chunk with some left inodes allocated at it.  Grab
+	 * the chunk record.  Mark all the uninteresting inodes free because
+	 * they're before our start point.
+	 */
+	for (i = 0; i < idx; i++) {
+		if (XFS_INOBT_MASK(i) & ~irec->ir_free)
+			irec->ir_freecount++;
+	}
+
+	irec->ir_free |= xfs_inobt_maskn(0, idx);
+}
+
+/* Allocate memory for a walk. */
+STATIC int
+xfs_iwalk_alloc(
+	struct xfs_iwalk_ag	*iwag)
+{
+	size_t			size;
+
+	ASSERT(iwag->recs == NULL);
+	iwag->nr_recs = 0;
+
+	/* Allocate a prefetch buffer for inobt records. */
+	size = iwag->sz_recs * sizeof(struct xfs_inobt_rec_incore);
+	iwag->recs = kmem_alloc(size, KM_MAYFAIL);
+	if (iwag->recs == NULL)
+		return -ENOMEM;
+
+	return 0;
+}
+
+/* Free memory we allocated for a walk. */
+STATIC void
+xfs_iwalk_free(
+	struct xfs_iwalk_ag	*iwag)
+{
+	kmem_free(iwag->recs);
+	iwag->recs = NULL;
+}
+
+/* For each inuse inode in each cached inobt record, call our function. */
+STATIC int
+xfs_iwalk_ag_recs(
+	struct xfs_iwalk_ag		*iwag)
+{
+	struct xfs_mount		*mp = iwag->mp;
+	struct xfs_trans		*tp = iwag->tp;
+	xfs_ino_t			ino;
+	unsigned int			i, j;
+	xfs_agnumber_t			agno;
+	int				error;
+
+	agno = XFS_INO_TO_AGNO(mp, iwag->startino);
+	for (i = 0; i < iwag->nr_recs; i++) {
+		struct xfs_inobt_rec_incore	*irec = &iwag->recs[i];
+
+		trace_xfs_iwalk_ag_rec(mp, agno, irec);
+
+		if (xfs_pwork_want_abort(&iwag->pwork))
+			return 0;
+
+		if (iwag->inobt_walk_fn) {
+			error = iwag->inobt_walk_fn(mp, tp, agno, irec,
+					iwag->data);
+			if (error)
+				return error;
+		}
+
+		if (!iwag->iwalk_fn)
+			continue;
+
+		for (j = 0; j < XFS_INODES_PER_CHUNK; j++) {
+			if (xfs_pwork_want_abort(&iwag->pwork))
+				return 0;
+
+			/* Skip if this inode is free */
+			if (XFS_INOBT_MASK(j) & irec->ir_free)
+				continue;
+
+			/* Otherwise call our function. */
+			ino = XFS_AGINO_TO_INO(mp, agno, irec->ir_startino + j);
+			error = iwag->iwalk_fn(mp, tp, ino, iwag->data);
+			if (error)
+				return error;
+		}
+	}
+
+	return 0;
+}
+
+/* Delete cursor and let go of AGI. */
+static inline void
+xfs_iwalk_del_inobt(
+	struct xfs_trans	*tp,
+	struct xfs_btree_cur	**curpp,
+	struct xfs_buf		**agi_bpp,
+	int			error)
+{
+	if (*curpp) {
+		xfs_btree_del_cursor(*curpp, error);
+		*curpp = NULL;
+	}
+	if (*agi_bpp) {
+		xfs_trans_brelse(tp, *agi_bpp);
+		*agi_bpp = NULL;
+	}
+}
+
+/*
+ * Set ourselves up for walking inobt records starting from a given point in
+ * the filesystem.
+ *
+ * If caller passed in a nonzero start inode number, load the record from the
+ * inobt and make the record look like all the inodes before agino are free so
+ * that we skip them, and then move the cursor to the next inobt record.  This
+ * is how we support starting an iwalk in the middle of an inode chunk.
+ *
+ * If the caller passed in a start number of zero, move the cursor to the first
+ * inobt record.
+ *
+ * The caller is responsible for cleaning up the cursor and buffer pointer
+ * regardless of the error status.
+ */
+STATIC int
+xfs_iwalk_ag_start(
+	struct xfs_iwalk_ag	*iwag,
+	xfs_agnumber_t		agno,
+	xfs_agino_t		agino,
+	struct xfs_btree_cur	**curpp,
+	struct xfs_buf		**agi_bpp,
+	int			*has_more)
+{
+	struct xfs_mount	*mp = iwag->mp;
+	struct xfs_trans	*tp = iwag->tp;
+	struct xfs_inobt_rec_incore *irec;
+	int			error;
+
+	/* Set up a fresh cursor and empty the inobt cache. */
+	iwag->nr_recs = 0;
+	error = xfs_inobt_cur(mp, tp, agno, XFS_BTNUM_INO, curpp, agi_bpp);
+	if (error)
+		return error;
+
+	/* Starting at the beginning of the AG?  That's easy! */
+	if (agino == 0)
+		return xfs_inobt_lookup(*curpp, 0, XFS_LOOKUP_GE, has_more);
+
+	/*
+	 * Otherwise, we have to grab the inobt record where we left off, stuff
+	 * the record into our cache, and then see if there are more records.
+	 * We require a lookup cache of at least two elements so that the
+	 * caller doesn't have to deal with tearing down the cursor to walk the
+	 * records.
+	 */
+	error = xfs_inobt_lookup(*curpp, agino, XFS_LOOKUP_LE, has_more);
+	if (error)
+		return error;
+
+	/*
+	 * If the LE lookup at @agino yields no records, jump ahead to the
+	 * inobt cursor increment to see if there are more records to process.
+	 */
+	if (!*has_more)
+		goto out_advance;
+
+	/* Get the record, should always work */
+	irec = &iwag->recs[iwag->nr_recs];
+	error = xfs_inobt_get_rec(*curpp, irec, has_more);
+	if (error)
+		return error;
+	XFS_WANT_CORRUPTED_RETURN(mp, *has_more == 1);
+
+	/*
+	 * If the LE lookup yielded an inobt record before the cursor position,
+	 * skip it and see if there's another one after it.
+	 */
+	if (irec->ir_startino + XFS_INODES_PER_CHUNK <= agino)
+		goto out_advance;
+
+	/*
+	 * If agino fell in the middle of the inode record, make it look like
+	 * the inodes up to agino are free so that we don't return them again.
+	 */
+	if (iwag->trim_start)
+		xfs_iwalk_adjust_start(agino, irec);
+
+	/*
+	 * The prefetch calculation is supposed to give us a large enough inobt
+	 * record cache that grab_ichunk can stage a partial first record and
+	 * the loop body can cache a record without having to check for cache
+	 * space until after it reads an inobt record.
+	 */
+	iwag->nr_recs++;
+	ASSERT(iwag->nr_recs < iwag->sz_recs);
+
+out_advance:
+	return xfs_btree_increment(*curpp, 0, has_more);
+}
+
+/*
+ * The inobt record cache is full, so preserve the inobt cursor state and
+ * run callbacks on the cached inobt records.  When we're done, restore the
+ * cursor state to wherever the cursor would have been had the cache not been
+ * full (and therefore we could've just incremented the cursor) if *@has_more
+ * is true.  On exit, *@has_more will indicate whether or not the caller should
+ * try for more inode records.
+ */
+STATIC int
+xfs_iwalk_run_callbacks(
+	struct xfs_iwalk_ag		*iwag,
+	xfs_agnumber_t			agno,
+	struct xfs_btree_cur		**curpp,
+	struct xfs_buf			**agi_bpp,
+	int				*has_more)
+{
+	struct xfs_mount		*mp = iwag->mp;
+	struct xfs_trans		*tp = iwag->tp;
+	struct xfs_inobt_rec_incore	*irec;
+	xfs_agino_t			restart;
+	int				error;
+
+	ASSERT(iwag->nr_recs > 0);
+
+	/* Delete cursor but remember the last record we cached... */
+	xfs_iwalk_del_inobt(tp, curpp, agi_bpp, 0);
+	irec = &iwag->recs[iwag->nr_recs - 1];
+	restart = irec->ir_startino + XFS_INODES_PER_CHUNK - 1;
+
+	error = xfs_iwalk_ag_recs(iwag);
+	if (error)
+		return error;
+
+	/* ...empty the cache... */
+	iwag->nr_recs = 0;
+
+	if (!has_more)
+		return 0;
+
+	/* ...and recreate the cursor just past where we left off. */
+	error = xfs_inobt_cur(mp, tp, agno, XFS_BTNUM_INO, curpp, agi_bpp);
+	if (error)
+		return error;
+
+	return xfs_inobt_lookup(*curpp, restart, XFS_LOOKUP_GE, has_more);
+}
+
+/* Walk all inodes in a single AG, from @iwag->startino to the end of the AG. */
+STATIC int
+xfs_iwalk_ag(
+	struct xfs_iwalk_ag		*iwag)
+{
+	struct xfs_mount		*mp = iwag->mp;
+	struct xfs_trans		*tp = iwag->tp;
+	struct xfs_buf			*agi_bp = NULL;
+	struct xfs_btree_cur		*cur = NULL;
+	xfs_agnumber_t			agno;
+	xfs_agino_t			agino;
+	int				has_more;
+	int				error = 0;
+
+	/* Set up our cursor at the right place in the inode btree. */
+	agno = XFS_INO_TO_AGNO(mp, iwag->startino);
+	agino = XFS_INO_TO_AGINO(mp, iwag->startino);
+	error = xfs_iwalk_ag_start(iwag, agno, agino, &cur, &agi_bp, &has_more);
+
+	while (!error && has_more) {
+		struct xfs_inobt_rec_incore	*irec;
+
+		cond_resched();
+		if (xfs_pwork_want_abort(&iwag->pwork))
+			goto out;
+
+		/* Fetch the inobt record. */
+		irec = &iwag->recs[iwag->nr_recs];
+		error = xfs_inobt_get_rec(cur, irec, &has_more);
+		if (error || !has_more)
+			break;
+
+		/* No allocated inodes in this chunk; skip it. */
+		if (iwag->skip_empty && irec->ir_freecount == irec->ir_count) {
+			error = xfs_btree_increment(cur, 0, &has_more);
+			if (error)
+				break;
+			continue;
+		}
+
+		/*
+		 * Start readahead for this inode chunk in anticipation of
+		 * walking the inodes.
+		 */
+		if (iwag->iwalk_fn)
+			xfs_iwalk_ichunk_ra(mp, agno, irec);
+
+		/*
+		 * If there's space in the buffer for more records, increment
+		 * the btree cursor and grab more.
+		 */
+		if (++iwag->nr_recs < iwag->sz_recs) {
+			error = xfs_btree_increment(cur, 0, &has_more);
+			if (error || !has_more)
+				break;
+			continue;
+		}
+
+		/*
+		 * Otherwise, we need to save cursor state and run the callback
+		 * function on the cached records.  The run_callbacks function
+		 * is supposed to return a cursor pointing to the record where
+		 * we would be if we had been able to increment like above.
+		 */
+		ASSERT(has_more);
+		error = xfs_iwalk_run_callbacks(iwag, agno, &cur, &agi_bp,
+				&has_more);
+	}
+
+	if (iwag->nr_recs == 0 || error)
+		goto out;
+
+	/* Walk the unprocessed records in the cache. */
+	error = xfs_iwalk_run_callbacks(iwag, agno, &cur, &agi_bp, &has_more);
+
+out:
+	xfs_iwalk_del_inobt(tp, &cur, &agi_bp, error);
+	return error;
+}
+
+/*
+ * We experimentally determined that the reduction in ioctl call overhead
+ * diminishes when userspace asks for more than 2048 inodes, so we'll cap
+ * prefetch at this point.
+ */
+#define IWALK_MAX_INODE_PREFETCH	(2048U)
+
+/*
+ * Given the number of inodes to prefetch, set the number of inobt records that
+ * we cache in memory, which controls the number of inodes we try to read
+ * ahead.  Set the maximum if @inodes == 0.
+ */
+static inline unsigned int
+xfs_iwalk_prefetch(
+	unsigned int		inodes)
+{
+	unsigned int		inobt_records;
+
+	/*
+	 * If the caller didn't tell us the number of inodes they wanted,
+	 * assume the maximum prefetch possible for best performance.
+	 * Otherwise, cap prefetch at that maximum so that we don't start an
+	 * absurd amount of prefetch.
+	 */
+	if (inodes == 0)
+		inodes = IWALK_MAX_INODE_PREFETCH;
+	inodes = min(inodes, IWALK_MAX_INODE_PREFETCH);
+
+	/* Round the inode count up to a full chunk. */
+	inodes = round_up(inodes, XFS_INODES_PER_CHUNK);
+
+	/*
+	 * In order to convert the number of inodes to prefetch into an
+	 * estimate of the number of inobt records to cache, we require a
+	 * conversion factor that reflects our expectations of the average
+	 * loading factor of an inode chunk.  Based on data gathered, most
+	 * (but not all) filesystems manage to keep the inode chunks totally
+	 * full, so we'll underestimate slightly so that our readahead will
+	 * still deliver the performance we want on aging filesystems:
+	 *
+	 * inobt = inodes / (INODES_PER_CHUNK * (4 / 5));
+	 *
+	 * The funny math is to avoid integer division.
+	 */
+	inobt_records = (inodes * 5) / (4 * XFS_INODES_PER_CHUNK);
+
+	/*
+	 * Allocate enough space to prefetch at least two inobt records so that
+	 * we can cache both the record where the iwalk started and the next
+	 * record.  This simplifies the AG inode walk loop setup code.
+	 */
+	return max(inobt_records, 2U);
+}
+
+/*
+ * Walk all inodes in the filesystem starting from @startino.  The @iwalk_fn
+ * will be called for each allocated inode, being passed the inode's number and
+ * @data.  @max_prefetch controls how many inobt records' worth of inodes we
+ * try to readahead.
+ */
+int
+xfs_iwalk(
+	struct xfs_mount	*mp,
+	struct xfs_trans	*tp,
+	xfs_ino_t		startino,
+	unsigned int		flags,
+	xfs_iwalk_fn		iwalk_fn,
+	unsigned int		inode_records,
+	void			*data)
+{
+	struct xfs_iwalk_ag	iwag = {
+		.mp		= mp,
+		.tp		= tp,
+		.iwalk_fn	= iwalk_fn,
+		.data		= data,
+		.startino	= startino,
+		.sz_recs	= xfs_iwalk_prefetch(inode_records),
+		.trim_start	= 1,
+		.skip_empty	= 1,
+		.pwork		= XFS_PWORK_SINGLE_THREADED,
+	};
+	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, startino);
+	int			error;
+
+	ASSERT(agno < mp->m_sb.sb_agcount);
+	ASSERT(!(flags & ~XFS_IWALK_FLAGS_ALL));
+
+	error = xfs_iwalk_alloc(&iwag);
+	if (error)
+		return error;
+
+	for (; agno < mp->m_sb.sb_agcount; agno++) {
+		error = xfs_iwalk_ag(&iwag);
+		if (error)
+			break;
+		iwag.startino = XFS_AGINO_TO_INO(mp, agno + 1, 0);
+		if (flags & XFS_INOBT_WALK_SAME_AG)
+			break;
+	}
+
+	xfs_iwalk_free(&iwag);
+	return error;
+}
+
+/* Run per-thread iwalk work. */
+static int
+xfs_iwalk_ag_work(
+	struct xfs_mount	*mp,
+	struct xfs_pwork	*pwork)
+{
+	struct xfs_iwalk_ag	*iwag;
+	int			error = 0;
+
+	iwag = container_of(pwork, struct xfs_iwalk_ag, pwork);
+	if (xfs_pwork_want_abort(pwork))
+		goto out;
+
+	error = xfs_iwalk_alloc(iwag);
+	if (error)
+		goto out;
+
+	error = xfs_iwalk_ag(iwag);
+	xfs_iwalk_free(iwag);
+out:
+	kmem_free(iwag);
+	return error;
+}
+
+/*
+ * Walk all the inodes in the filesystem using multiple threads to process each
+ * AG.
+ */
+int
+xfs_iwalk_threaded(
+	struct xfs_mount	*mp,
+	xfs_ino_t		startino,
+	unsigned int		flags,
+	xfs_iwalk_fn		iwalk_fn,
+	unsigned int		inode_records,
+	bool			polled,
+	void			*data)
+{
+	struct xfs_pwork_ctl	pctl;
+	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, startino);
+	unsigned int		nr_threads;
+	int			error;
+
+	ASSERT(agno < mp->m_sb.sb_agcount);
+	ASSERT(!(flags & ~XFS_IWALK_FLAGS_ALL));
+
+	nr_threads = xfs_pwork_guess_datadev_parallelism(mp);
+	error = xfs_pwork_init(mp, &pctl, xfs_iwalk_ag_work, "xfs_iwalk",
+			nr_threads);
+	if (error)
+		return error;
+
+	for (; agno < mp->m_sb.sb_agcount; agno++) {
+		struct xfs_iwalk_ag	*iwag;
+
+		if (xfs_pwork_ctl_want_abort(&pctl))
+			break;
+
+		iwag = kmem_zalloc(sizeof(struct xfs_iwalk_ag), KM_SLEEP);
+		iwag->mp = mp;
+		iwag->iwalk_fn = iwalk_fn;
+		iwag->data = data;
+		iwag->startino = startino;
+		iwag->sz_recs = xfs_iwalk_prefetch(inode_records);
+		xfs_pwork_queue(&pctl, &iwag->pwork);
+		startino = XFS_AGINO_TO_INO(mp, agno + 1, 0);
+		if (flags & XFS_INOBT_WALK_SAME_AG)
+			break;
+	}
+
+	if (polled)
+		xfs_pwork_poll(&pctl);
+	return xfs_pwork_destroy(&pctl);
+}
+
+/*
+ * Allow callers to cache up to a page's worth of inobt records.  This reflects
+ * the existing inumbers prefetching behavior.  Since the inobt walk does not
+ * itself do anything with the inobt records, we can set a fairly high limit
+ * here.
+ */
+#define MAX_INOBT_WALK_PREFETCH	\
+	(PAGE_SIZE / sizeof(struct xfs_inobt_rec_incore))
+
+/*
+ * Given the number of records that the user wanted, set the number of inobt
+ * records that we buffer in memory.  Set the maximum if @inobt_records == 0.
+ */
+static inline unsigned int
+xfs_inobt_walk_prefetch(
+	unsigned int		inobt_records)
+{
+	/*
+	 * If the caller didn't tell us the number of inobt records they
+	 * wanted, assume the maximum prefetch possible for best performance.
+	 */
+	if (inobt_records == 0)
+		inobt_records = MAX_INOBT_WALK_PREFETCH;
+
+	/*
+	 * Allocate enough space to prefetch at least two inobt records so that
+	 * we can cache both the record where the iwalk started and the next
+	 * record.  This simplifies the AG inode walk loop setup code.
+	 */
+	inobt_records = max(inobt_records, 2U);
+
+	/*
+	 * Cap prefetch at that maximum so that we don't use an absurd amount
+	 * of memory.
+	 */
+	return min_t(unsigned int, inobt_records, MAX_INOBT_WALK_PREFETCH);
+}
+
+/*
+ * Walk all inode btree records in the filesystem starting from @startino.  The
+ * @inobt_walk_fn will be called for each btree record, being passed the incore
+ * record and @data.  @max_prefetch controls how many inobt records we try to
+ * cache ahead of time.
+ */
+int
+xfs_inobt_walk(
+	struct xfs_mount	*mp,
+	struct xfs_trans	*tp,
+	xfs_ino_t		startino,
+	unsigned int		flags,
+	xfs_inobt_walk_fn	inobt_walk_fn,
+	unsigned int		inobt_records,
+	void			*data)
+{
+	struct xfs_iwalk_ag	iwag = {
+		.mp		= mp,
+		.tp		= tp,
+		.inobt_walk_fn	= inobt_walk_fn,
+		.data		= data,
+		.startino	= startino,
+		.sz_recs	= xfs_inobt_walk_prefetch(inobt_records),
+		.pwork		= XFS_PWORK_SINGLE_THREADED,
+	};
+	xfs_agnumber_t		agno = XFS_INO_TO_AGNO(mp, startino);
+	int			error;
+
+	ASSERT(agno < mp->m_sb.sb_agcount);
+	ASSERT(!(flags & ~XFS_INOBT_WALK_FLAGS_ALL));
+
+	error = xfs_iwalk_alloc(&iwag);
+	if (error)
+		return error;
+
+	for (; agno < mp->m_sb.sb_agcount; agno++) {
+		error = xfs_iwalk_ag(&iwag);
+		if (error)
+			break;
+		iwag.startino = XFS_AGINO_TO_INO(mp, agno + 1, 0);
+		if (flags & XFS_INOBT_WALK_SAME_AG)
+			break;
+	}
+
+	xfs_iwalk_free(&iwag);
+	return error;
+}
diff --git a/fs/xfs/xfs_iwalk.h b/fs/xfs/xfs_iwalk.h
new file mode 100644
index 000000000000..6c960e10ed4d
--- /dev/null
+++ b/fs/xfs/xfs_iwalk.h
@@ -0,0 +1,46 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#ifndef __XFS_IWALK_H__
+#define __XFS_IWALK_H__
+
+/* Walk all inodes in the filesystem starting from @startino. */
+typedef int (*xfs_iwalk_fn)(struct xfs_mount *mp, struct xfs_trans *tp,
+			    xfs_ino_t ino, void *data);
+/* Return values for xfs_iwalk_fn. */
+#define XFS_IWALK_CONTINUE	(XFS_ITER_CONTINUE)
+#define XFS_IWALK_ABORT		(XFS_ITER_ABORT)
+
+int xfs_iwalk(struct xfs_mount *mp, struct xfs_trans *tp, xfs_ino_t startino,
+		unsigned int flags, xfs_iwalk_fn iwalk_fn,
+		unsigned int inode_records, void *data);
+int xfs_iwalk_threaded(struct xfs_mount *mp, xfs_ino_t startino,
+		unsigned int flags, xfs_iwalk_fn iwalk_fn,
+		unsigned int inode_records, bool poll, void *data);
+
+/* Only iterate inodes within the same AG as @startino. */
+#define XFS_IWALK_SAME_AG	(0x1)
+
+#define XFS_IWALK_FLAGS_ALL	(XFS_IWALK_SAME_AG)
+
+/* Walk all inode btree records in the filesystem starting from @startino. */
+typedef int (*xfs_inobt_walk_fn)(struct xfs_mount *mp, struct xfs_trans *tp,
+				 xfs_agnumber_t agno,
+				 const struct xfs_inobt_rec_incore *irec,
+				 void *data);
+/* Return value (for xfs_inobt_walk_fn) that aborts the walk immediately. */
+#define XFS_INOBT_WALK_ABORT	(XFS_IWALK_ABORT)
+
+int xfs_inobt_walk(struct xfs_mount *mp, struct xfs_trans *tp,
+		xfs_ino_t startino, unsigned int flags,
+		xfs_inobt_walk_fn inobt_walk_fn, unsigned int inobt_records,
+		void *data);
+
+/* Only iterate inobt records within the same AG as @startino. */
+#define XFS_INOBT_WALK_SAME_AG	(XFS_IWALK_SAME_AG)
+
+#define XFS_INOBT_WALK_FLAGS_ALL (XFS_INOBT_WALK_SAME_AG)
+
+#endif /* __XFS_IWALK_H__ */
diff --git a/fs/xfs/xfs_linux.h b/fs/xfs/xfs_linux.h
index edbd5a210df2..ca15105681ca 100644
--- a/fs/xfs/xfs_linux.h
+++ b/fs/xfs/xfs_linux.h
@@ -110,8 +110,6 @@ typedef __u32			xfs_nlink_t;
 #define current_restore_flags_nested(sp, f)	\
 		(current->flags = ((current->flags & ~(f)) | (*(sp) & (f))))
 
-#define spinlock_destroy(lock)
-
 #define NBBY		8		/* number of bits per byte */
 
 /*
@@ -221,6 +219,9 @@ static inline uint64_t howmany_64(uint64_t x, uint32_t y)
 	return x;
 }
 
+int xfs_rw_bdev(struct block_device *bdev, sector_t sector, unsigned int count,
+		char *data, unsigned int op);
+
 #define ASSERT_ALWAYS(expr)	\
 	(likely(expr) ? (void)0 : assfail(#expr, __FILE__, __LINE__))
 
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index c3b610b687d1..00e9f5c388d3 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -16,13 +16,10 @@
 #include "xfs_trans_priv.h"
 #include "xfs_log.h"
 #include "xfs_log_priv.h"
-#include "xfs_log_recover.h"
-#include "xfs_inode.h"
 #include "xfs_trace.h"
-#include "xfs_fsops.h"
-#include "xfs_cksum.h"
 #include "xfs_sysfs.h"
 #include "xfs_sb.h"
+#include "xfs_health.h"
 
 kmem_zone_t	*xfs_log_ticket_zone;
 
@@ -44,21 +41,14 @@ STATIC int
 xlog_space_left(
 	struct xlog		*log,
 	atomic64_t		*head);
-STATIC int
-xlog_sync(
-	struct xlog		*log,
-	struct xlog_in_core	*iclog);
 STATIC void
 xlog_dealloc_log(
 	struct xlog		*log);
 
 /* local state machine functions */
-STATIC void xlog_state_done_syncing(xlog_in_core_t *iclog, int);
-STATIC void
-xlog_state_do_callback(
-	struct xlog		*log,
-	int			aborted,
-	struct xlog_in_core	*iclog);
+STATIC void xlog_state_done_syncing(
+	struct xlog_in_core	*iclog,
+	bool			aborted);
 STATIC int
 xlog_state_get_iclog_space(
 	struct xlog		*log,
@@ -106,8 +96,7 @@ STATIC void
 xlog_verify_iclog(
 	struct xlog		*log,
 	struct xlog_in_core	*iclog,
-	int			count,
-	bool                    syncing);
+	int			count);
 STATIC void
 xlog_verify_tail_lsn(
 	struct xlog		*log,
@@ -116,7 +105,7 @@ xlog_verify_tail_lsn(
 #else
 #define xlog_verify_dest_ptr(a,b)
 #define xlog_verify_grant_tail(a)
-#define xlog_verify_iclog(a,b,c,d)
+#define xlog_verify_iclog(a,b,c)
 #define xlog_verify_tail_lsn(a,b,c)
 #endif
 
@@ -540,32 +529,6 @@ xfs_log_done(
 	return lsn;
 }
 
-/*
- * Attaches a new iclog I/O completion callback routine during
- * transaction commit.  If the log is in error state, a non-zero
- * return code is handed back and the caller is responsible for
- * executing the callback at an appropriate time.
- */
-int
-xfs_log_notify(
-	struct xlog_in_core	*iclog,
-	xfs_log_callback_t	*cb)
-{
-	int	abortflg;
-
-	spin_lock(&iclog->ic_callback_lock);
-	abortflg = (iclog->ic_state & XLOG_STATE_IOERROR);
-	if (!abortflg) {
-		ASSERT_ALWAYS((iclog->ic_state == XLOG_STATE_ACTIVE) ||
-			      (iclog->ic_state == XLOG_STATE_WANT_SYNC));
-		cb->cb_next = NULL;
-		*(iclog->ic_callback_tail) = cb;
-		iclog->ic_callback_tail = &(cb->cb_next);
-	}
-	spin_unlock(&iclog->ic_callback_lock);
-	return abortflg;
-}
-
 int
 xfs_log_release_iclog(
 	struct xfs_mount	*mp,
@@ -806,16 +769,12 @@ xfs_log_mount_finish(
  * The mount has failed. Cancel the recovery if it hasn't completed and destroy
  * the log.
  */
-int
+void
 xfs_log_mount_cancel(
 	struct xfs_mount	*mp)
 {
-	int			error;
-
-	error = xlog_recover_cancel(mp->m_log);
+	xlog_recover_cancel(mp->m_log);
 	xfs_log_unmount(mp);
-
-	return error;
 }
 
 /*
@@ -861,7 +820,7 @@ xfs_log_write_unmount_record(
 	 * recalculated during log recovery at next mount.  Refer to
 	 * xlog_check_unmount_rec for more details.
 	 */
-	if (XFS_TEST_ERROR((mp->m_flags & XFS_MOUNT_BAD_SUMMARY), mp,
+	if (XFS_TEST_ERROR(xfs_fs_has_sickness(mp, XFS_SICK_FS_COUNTERS), mp,
 			XFS_ERRTAG_FORCE_SUMMARY_RECALC)) {
 		xfs_alert(mp, "%s: will fix summary counters at next mount",
 				__func__);
@@ -931,7 +890,7 @@ xfs_log_unmount_write(xfs_mount_t *mp)
 	 * Or, if we are doing a forced umount (typically because of IO errors).
 	 */
 	if (mp->m_flags & XFS_MOUNT_NORECOVERY ||
-	    xfs_readonly_buftarg(log->l_mp->m_logdev_targp)) {
+	    xfs_readonly_buftarg(log->l_targ)) {
 		ASSERT(mp->m_flags & XFS_MOUNT_RDONLY);
 		return 0;
 	}
@@ -1243,53 +1202,49 @@ xlog_space_left(
 }
 
 
-/*
- * Log function which is called when an io completes.
- *
- * The log manager needs its own routine, in order to control what
- * happens with the buffer after the write completes.
- */
 static void
-xlog_iodone(xfs_buf_t *bp)
+xlog_ioend_work(
+	struct work_struct	*work)
 {
-	struct xlog_in_core	*iclog = bp->b_log_item;
-	struct xlog		*l = iclog->ic_log;
-	int			aborted = 0;
+	struct xlog_in_core     *iclog =
+		container_of(work, struct xlog_in_core, ic_end_io_work);
+	struct xlog		*log = iclog->ic_log;
+	bool			aborted = false;
+	int			error;
+
+	error = blk_status_to_errno(iclog->ic_bio.bi_status);
+#ifdef DEBUG
+	/* treat writes with injected CRC errors as failed */
+	if (iclog->ic_fail_crc)
+		error = -EIO;
+#endif
 
 	/*
-	 * Race to shutdown the filesystem if we see an error or the iclog is in
-	 * IOABORT state. The IOABORT state is only set in DEBUG mode to inject
-	 * CRC errors into log recovery.
+	 * Race to shutdown the filesystem if we see an error.
 	 */
-	if (XFS_TEST_ERROR(bp->b_error, l->l_mp, XFS_ERRTAG_IODONE_IOERR) ||
-	    iclog->ic_state & XLOG_STATE_IOABORT) {
-		if (iclog->ic_state & XLOG_STATE_IOABORT)
-			iclog->ic_state &= ~XLOG_STATE_IOABORT;
-
-		xfs_buf_ioerror_alert(bp, __func__);
-		xfs_buf_stale(bp);
-		xfs_force_shutdown(l->l_mp, SHUTDOWN_LOG_IO_ERROR);
+	if (XFS_TEST_ERROR(error, log->l_mp, XFS_ERRTAG_IODONE_IOERR)) {
+		xfs_alert(log->l_mp, "log I/O error %d", error);
+		xfs_force_shutdown(log->l_mp, SHUTDOWN_LOG_IO_ERROR);
 		/*
 		 * This flag will be propagated to the trans-committed
 		 * callback routines to let them know that the log-commit
 		 * didn't succeed.
 		 */
-		aborted = XFS_LI_ABORTED;
+		aborted = true;
 	} else if (iclog->ic_state & XLOG_STATE_IOERROR) {
-		aborted = XFS_LI_ABORTED;
+		aborted = true;
 	}
 
-	/* log I/O is always issued ASYNC */
-	ASSERT(bp->b_flags & XBF_ASYNC);
 	xlog_state_done_syncing(iclog, aborted);
+	bio_uninit(&iclog->ic_bio);
 
 	/*
-	 * drop the buffer lock now that we are done. Nothing references
-	 * the buffer after this, so an unmount waiting on this lock can now
-	 * tear it down safely. As such, it is unsafe to reference the buffer
-	 * (bp) after the unlock as we could race with it being freed.
+	 * Drop the lock to signal that we are done. Nothing references the
+	 * iclog after this, so an unmount waiting on this lock can now tear it
+	 * down safely. As such, it is unsafe to reference the iclog after the
+	 * unlock as we could race with it being freed.
 	 */
-	xfs_buf_unlock(bp);
+	up(&iclog->ic_sema);
 }
 
 /*
@@ -1300,65 +1255,26 @@ xlog_iodone(xfs_buf_t *bp)
  * If the filesystem blocksize is too large, we may need to choose a
  * larger size since the directory code currently logs entire blocks.
  */
-
 STATIC void
 xlog_get_iclog_buffer_size(
 	struct xfs_mount	*mp,
 	struct xlog		*log)
 {
-	int size;
-	int xhdrs;
-
 	if (mp->m_logbufs <= 0)
-		log->l_iclog_bufs = XLOG_MAX_ICLOGS;
-	else
-		log->l_iclog_bufs = mp->m_logbufs;
+		mp->m_logbufs = XLOG_MAX_ICLOGS;
+	if (mp->m_logbsize <= 0)
+		mp->m_logbsize = XLOG_BIG_RECORD_BSIZE;
+
+	log->l_iclog_bufs = mp->m_logbufs;
+	log->l_iclog_size = mp->m_logbsize;
 
 	/*
-	 * Buffer size passed in from mount system call.
+	 * # headers = size / 32k - one header holds cycles from 32k of data.
 	 */
-	if (mp->m_logbsize > 0) {
-		size = log->l_iclog_size = mp->m_logbsize;
-		log->l_iclog_size_log = 0;
-		while (size != 1) {
-			log->l_iclog_size_log++;
-			size >>= 1;
-		}
-
-		if (xfs_sb_version_haslogv2(&mp->m_sb)) {
-			/* # headers = size / 32k
-			 * one header holds cycles from 32k of data
-			 */
-
-			xhdrs = mp->m_logbsize / XLOG_HEADER_CYCLE_SIZE;
-			if (mp->m_logbsize % XLOG_HEADER_CYCLE_SIZE)
-				xhdrs++;
-			log->l_iclog_hsize = xhdrs << BBSHIFT;
-			log->l_iclog_heads = xhdrs;
-		} else {
-			ASSERT(mp->m_logbsize <= XLOG_BIG_RECORD_BSIZE);
-			log->l_iclog_hsize = BBSIZE;
-			log->l_iclog_heads = 1;
-		}
-		goto done;
-	}
-
-	/* All machines use 32kB buffers by default. */
-	log->l_iclog_size = XLOG_BIG_RECORD_BSIZE;
-	log->l_iclog_size_log = XLOG_BIG_RECORD_BSHIFT;
-
-	/* the default log size is 16k or 32k which is one header sector */
-	log->l_iclog_hsize = BBSIZE;
-	log->l_iclog_heads = 1;
-
-done:
-	/* are we being asked to make the sizes selected above visible? */
-	if (mp->m_logbufs == 0)
-		mp->m_logbufs = log->l_iclog_bufs;
-	if (mp->m_logbsize == 0)
-		mp->m_logbsize = log->l_iclog_size;
-}	/* xlog_get_iclog_buffer_size */
-
+	log->l_iclog_heads =
+		DIV_ROUND_UP(mp->m_logbsize, XLOG_HEADER_CYCLE_SIZE);
+	log->l_iclog_hsize = log->l_iclog_heads << BBSHIFT;
+}
 
 void
 xfs_log_work_queue(
@@ -1421,7 +1337,6 @@ xlog_alloc_log(
 	xlog_rec_header_t	*head;
 	xlog_in_core_t		**iclogp;
 	xlog_in_core_t		*iclog, *prev_iclog=NULL;
-	xfs_buf_t		*bp;
 	int			i;
 	int			error = -ENOMEM;
 	uint			log2_size = 0;
@@ -1479,30 +1394,6 @@ xlog_alloc_log(
 
 	xlog_get_iclog_buffer_size(mp, log);
 
-	/*
-	 * Use a NULL block for the extra log buffer used during splits so that
-	 * it will trigger errors if we ever try to do IO on it without first
-	 * having set it up properly.
-	 */
-	error = -ENOMEM;
-	bp = xfs_buf_alloc(mp->m_logdev_targp, XFS_BUF_DADDR_NULL,
-			   BTOBB(log->l_iclog_size), XBF_NO_IOACCT);
-	if (!bp)
-		goto out_free_log;
-
-	/*
-	 * The iclogbuf buffer locks are held over IO but we are not going to do
-	 * IO yet.  Hence unlock the buffer so that the log IO path can grab it
-	 * when appropriately.
-	 */
-	ASSERT(xfs_buf_islocked(bp));
-	xfs_buf_unlock(bp);
-
-	/* use high priority wq for log I/O completion */
-	bp->b_ioend_wq = mp->m_log_workqueue;
-	bp->b_iodone = xlog_iodone;
-	log->l_xbuf = bp;
-
 	spin_lock_init(&log->l_icloglock);
 	init_waitqueue_head(&log->l_flush_wait);
 
@@ -1515,29 +1406,22 @@ xlog_alloc_log(
 	 * xlog_in_core_t in xfs_log_priv.h for details.
 	 */
 	ASSERT(log->l_iclog_size >= 4096);
-	for (i=0; i < log->l_iclog_bufs; i++) {
-		*iclogp = kmem_zalloc(sizeof(xlog_in_core_t), KM_MAYFAIL);
-		if (!*iclogp)
+	for (i = 0; i < log->l_iclog_bufs; i++) {
+		size_t bvec_size = howmany(log->l_iclog_size, PAGE_SIZE) *
+				sizeof(struct bio_vec);
+
+		iclog = kmem_zalloc(sizeof(*iclog) + bvec_size, KM_MAYFAIL);
+		if (!iclog)
 			goto out_free_iclog;
 
-		iclog = *iclogp;
+		*iclogp = iclog;
 		iclog->ic_prev = prev_iclog;
 		prev_iclog = iclog;
 
-		bp = xfs_buf_get_uncached(mp->m_logdev_targp,
-					  BTOBB(log->l_iclog_size),
-					  XBF_NO_IOACCT);
-		if (!bp)
+		iclog->ic_data = kmem_alloc_large(log->l_iclog_size,
+				KM_MAYFAIL);
+		if (!iclog->ic_data)
 			goto out_free_iclog;
-
-		ASSERT(xfs_buf_islocked(bp));
-		xfs_buf_unlock(bp);
-
-		/* use high priority wq for log I/O completion */
-		bp->b_ioend_wq = mp->m_log_workqueue;
-		bp->b_iodone = xlog_iodone;
-		iclog->ic_bp = bp;
-		iclog->ic_data = bp->b_addr;
 #ifdef DEBUG
 		log->l_iclog_bak[i] = &iclog->ic_header;
 #endif
@@ -1551,36 +1435,43 @@ xlog_alloc_log(
 		head->h_fmt = cpu_to_be32(XLOG_FMT);
 		memcpy(&head->h_fs_uuid, &mp->m_sb.sb_uuid, sizeof(uuid_t));
 
-		iclog->ic_size = BBTOB(bp->b_length) - log->l_iclog_hsize;
+		iclog->ic_size = log->l_iclog_size - log->l_iclog_hsize;
 		iclog->ic_state = XLOG_STATE_ACTIVE;
 		iclog->ic_log = log;
 		atomic_set(&iclog->ic_refcnt, 0);
 		spin_lock_init(&iclog->ic_callback_lock);
-		iclog->ic_callback_tail = &(iclog->ic_callback);
+		INIT_LIST_HEAD(&iclog->ic_callbacks);
 		iclog->ic_datap = (char *)iclog->ic_data + log->l_iclog_hsize;
 
 		init_waitqueue_head(&iclog->ic_force_wait);
 		init_waitqueue_head(&iclog->ic_write_wait);
+		INIT_WORK(&iclog->ic_end_io_work, xlog_ioend_work);
+		sema_init(&iclog->ic_sema, 1);
 
 		iclogp = &iclog->ic_next;
 	}
 	*iclogp = log->l_iclog;			/* complete ring */
 	log->l_iclog->ic_prev = prev_iclog;	/* re-write 1st prev ptr */
 
+	log->l_ioend_workqueue = alloc_workqueue("xfs-log/%s",
+			WQ_MEM_RECLAIM | WQ_FREEZABLE | WQ_HIGHPRI, 0,
+			mp->m_fsname);
+	if (!log->l_ioend_workqueue)
+		goto out_free_iclog;
+
 	error = xlog_cil_init(log);
 	if (error)
-		goto out_free_iclog;
+		goto out_destroy_workqueue;
 	return log;
 
+out_destroy_workqueue:
+	destroy_workqueue(log->l_ioend_workqueue);
 out_free_iclog:
 	for (iclog = log->l_iclog; iclog; iclog = prev_iclog) {
 		prev_iclog = iclog->ic_next;
-		if (iclog->ic_bp)
-			xfs_buf_free(iclog->ic_bp);
+		kmem_free(iclog->ic_data);
 		kmem_free(iclog);
 	}
-	spinlock_destroy(&log->l_icloglock);
-	xfs_buf_free(log->l_xbuf);
 out_free_log:
 	kmem_free(log);
 out:
@@ -1765,42 +1656,155 @@ xlog_cksum(
 	return xfs_end_cksum(crc);
 }
 
-/*
- * The bdstrat callback function for log bufs. This gives us a central
- * place to trap bufs in case we get hit by a log I/O error and need to
- * shutdown. Actually, in practice, even when we didn't get a log error,
- * we transition the iclogs to IOERROR state *after* flushing all existing
- * iclogs to disk. This is because we don't want anymore new transactions to be
- * started or completed afterwards.
- *
- * We lock the iclogbufs here so that we can serialise against IO completion
- * during unmount. We might be processing a shutdown triggered during unmount,
- * and that can occur asynchronously to the unmount thread, and hence we need to
- * ensure that completes before tearing down the iclogbufs. Hence we need to
- * hold the buffer lock across the log IO to acheive that.
- */
-STATIC int
-xlog_bdstrat(
-	struct xfs_buf		*bp)
+static void
+xlog_bio_end_io(
+	struct bio		*bio)
 {
-	struct xlog_in_core	*iclog = bp->b_log_item;
+	struct xlog_in_core	*iclog = bio->bi_private;
 
-	xfs_buf_lock(bp);
-	if (iclog->ic_state & XLOG_STATE_IOERROR) {
-		xfs_buf_ioerror(bp, -EIO);
-		xfs_buf_stale(bp);
-		xfs_buf_ioend(bp);
+	queue_work(iclog->ic_log->l_ioend_workqueue,
+		   &iclog->ic_end_io_work);
+}
+
+static void
+xlog_map_iclog_data(
+	struct bio		*bio,
+	void			*data,
+	size_t			count)
+{
+	do {
+		struct page	*page = kmem_to_page(data);
+		unsigned int	off = offset_in_page(data);
+		size_t		len = min_t(size_t, count, PAGE_SIZE - off);
+
+		WARN_ON_ONCE(bio_add_page(bio, page, len, off) != len);
+
+		data += len;
+		count -= len;
+	} while (count);
+}
+
+STATIC void
+xlog_write_iclog(
+	struct xlog		*log,
+	struct xlog_in_core	*iclog,
+	uint64_t		bno,
+	unsigned int		count,
+	bool			need_flush)
+{
+	ASSERT(bno < log->l_logBBsize);
+
+	/*
+	 * We lock the iclogbufs here so that we can serialise against I/O
+	 * completion during unmount.  We might be processing a shutdown
+	 * triggered during unmount, and that can occur asynchronously to the
+	 * unmount thread, and hence we need to ensure that completes before
+	 * tearing down the iclogbufs.  Hence we need to hold the buffer lock
+	 * across the log IO to archieve that.
+	 */
+	down(&iclog->ic_sema);
+	if (unlikely(iclog->ic_state & XLOG_STATE_IOERROR)) {
 		/*
 		 * It would seem logical to return EIO here, but we rely on
 		 * the log state machine to propagate I/O errors instead of
-		 * doing it here. Similarly, IO completion will unlock the
-		 * buffer, so we don't do it here.
+		 * doing it here.  We kick of the state machine and unlock
+		 * the buffer manually, the code needs to be kept in sync
+		 * with the I/O completion path.
 		 */
-		return 0;
+		xlog_state_done_syncing(iclog, XFS_LI_ABORTED);
+		up(&iclog->ic_sema);
+		return;
 	}
 
-	xfs_buf_submit(bp);
-	return 0;
+	iclog->ic_io_size = count;
+
+	bio_init(&iclog->ic_bio, iclog->ic_bvec, howmany(count, PAGE_SIZE));
+	bio_set_dev(&iclog->ic_bio, log->l_targ->bt_bdev);
+	iclog->ic_bio.bi_iter.bi_sector = log->l_logBBstart + bno;
+	iclog->ic_bio.bi_end_io = xlog_bio_end_io;
+	iclog->ic_bio.bi_private = iclog;
+	iclog->ic_bio.bi_opf = REQ_OP_WRITE | REQ_META | REQ_SYNC | REQ_FUA;
+	if (need_flush)
+		iclog->ic_bio.bi_opf |= REQ_PREFLUSH;
+
+	xlog_map_iclog_data(&iclog->ic_bio, iclog->ic_data, iclog->ic_io_size);
+	if (is_vmalloc_addr(iclog->ic_data))
+		flush_kernel_vmap_range(iclog->ic_data, iclog->ic_io_size);
+
+	/*
+	 * If this log buffer would straddle the end of the log we will have
+	 * to split it up into two bios, so that we can continue at the start.
+	 */
+	if (bno + BTOBB(count) > log->l_logBBsize) {
+		struct bio *split;
+
+		split = bio_split(&iclog->ic_bio, log->l_logBBsize - bno,
+				  GFP_NOIO, &fs_bio_set);
+		bio_chain(split, &iclog->ic_bio);
+		submit_bio(split);
+
+		/* restart at logical offset zero for the remainder */
+		iclog->ic_bio.bi_iter.bi_sector = log->l_logBBstart;
+	}
+
+	submit_bio(&iclog->ic_bio);
+}
+
+/*
+ * We need to bump cycle number for the part of the iclog that is
+ * written to the start of the log. Watch out for the header magic
+ * number case, though.
+ */
+static void
+xlog_split_iclog(
+	struct xlog		*log,
+	void			*data,
+	uint64_t		bno,
+	unsigned int		count)
+{
+	unsigned int		split_offset = BBTOB(log->l_logBBsize - bno);
+	unsigned int		i;
+
+	for (i = split_offset; i < count; i += BBSIZE) {
+		uint32_t cycle = get_unaligned_be32(data + i);
+
+		if (++cycle == XLOG_HEADER_MAGIC_NUM)
+			cycle++;
+		put_unaligned_be32(cycle, data + i);
+	}
+}
+
+static int
+xlog_calc_iclog_size(
+	struct xlog		*log,
+	struct xlog_in_core	*iclog,
+	uint32_t		*roundoff)
+{
+	uint32_t		count_init, count;
+	bool			use_lsunit;
+
+	use_lsunit = xfs_sb_version_haslogv2(&log->l_mp->m_sb) &&
+			log->l_mp->m_sb.sb_logsunit > 1;
+
+	/* Add for LR header */
+	count_init = log->l_iclog_hsize + iclog->ic_offset;
+
+	/* Round out the log write size */
+	if (use_lsunit) {
+		/* we have a v2 stripe unit to use */
+		count = XLOG_LSUNITTOB(log, XLOG_BTOLSUNIT(log, count_init));
+	} else {
+		count = BBTOB(BTOBB(count_init));
+	}
+
+	ASSERT(count >= count_init);
+	*roundoff = count - count_init;
+
+	if (use_lsunit)
+		ASSERT(*roundoff < log->l_mp->m_sb.sb_logsunit);
+	else
+		ASSERT(*roundoff < BBTOB(1));
+	return count;
 }
 
 /*
@@ -1823,46 +1827,23 @@ xlog_bdstrat(
  * log will require grabbing the lock though.
  *
  * The entire log manager uses a logical block numbering scheme.  Only
- * log_sync (and then only bwrite()) know about the fact that the log may
- * not start with block zero on a given device.  The log block start offset
- * is added immediately before calling bwrite().
+ * xlog_write_iclog knows about the fact that the log may not start with
+ * block zero on a given device.
  */
-
-STATIC int
+STATIC void
 xlog_sync(
 	struct xlog		*log,
 	struct xlog_in_core	*iclog)
 {
-	xfs_buf_t	*bp;
-	int		i;
-	uint		count;		/* byte count of bwrite */
-	uint		count_init;	/* initial count before roundup */
-	int		roundoff;       /* roundoff to BB or stripe */
-	int		split = 0;	/* split write into two regions */
-	int		error;
-	int		v2 = xfs_sb_version_haslogv2(&log->l_mp->m_sb);
-	int		size;
+	unsigned int		count;		/* byte count of bwrite */
+	unsigned int		roundoff;       /* roundoff to BB or stripe */
+	uint64_t		bno;
+	unsigned int		size;
+	bool			need_flush = true, split = false;
 
-	XFS_STATS_INC(log->l_mp, xs_log_writes);
 	ASSERT(atomic_read(&iclog->ic_refcnt) == 0);
 
-	/* Add for LR header */
-	count_init = log->l_iclog_hsize + iclog->ic_offset;
-
-	/* Round out the log write size */
-	if (v2 && log->l_mp->m_sb.sb_logsunit > 1) {
-		/* we have a v2 stripe unit to use */
-		count = XLOG_LSUNITTOB(log, XLOG_BTOLSUNIT(log, count_init));
-	} else {
-		count = BBTOB(BTOBB(count_init));
-	}
-	roundoff = count - count_init;
-	ASSERT(roundoff >= 0);
-	ASSERT((v2 && log->l_mp->m_sb.sb_logsunit > 1 && 
-                roundoff < log->l_mp->m_sb.sb_logsunit)
-		|| 
-		(log->l_mp->m_sb.sb_logsunit <= 1 && 
-		 roundoff < BBTOB(1)));
+	count = xlog_calc_iclog_size(log, iclog, &roundoff);
 
 	/* move grant heads by roundoff in sync */
 	xlog_grant_add_space(log, &log->l_reserve_head.grant, roundoff);
@@ -1873,41 +1854,19 @@ xlog_sync(
 
 	/* real byte length */
 	size = iclog->ic_offset;
-	if (v2)
+	if (xfs_sb_version_haslogv2(&log->l_mp->m_sb))
 		size += roundoff;
 	iclog->ic_header.h_len = cpu_to_be32(size);
 
-	bp = iclog->ic_bp;
-	XFS_BUF_SET_ADDR(bp, BLOCK_LSN(be64_to_cpu(iclog->ic_header.h_lsn)));
-
+	XFS_STATS_INC(log->l_mp, xs_log_writes);
 	XFS_STATS_ADD(log->l_mp, xs_log_blocks, BTOBB(count));
 
-	/* Do we need to split this write into 2 parts? */
-	if (XFS_BUF_ADDR(bp) + BTOBB(count) > log->l_logBBsize) {
-		char		*dptr;
-
-		split = count - (BBTOB(log->l_logBBsize - XFS_BUF_ADDR(bp)));
-		count = BBTOB(log->l_logBBsize - XFS_BUF_ADDR(bp));
-		iclog->ic_bwritecnt = 2;
+	bno = BLOCK_LSN(be64_to_cpu(iclog->ic_header.h_lsn));
 
-		/*
-		 * Bump the cycle numbers at the start of each block in the
-		 * part of the iclog that ends up in the buffer that gets
-		 * written to the start of the log.
-		 *
-		 * Watch out for the header magic number case, though.
-		 */
-		dptr = (char *)&iclog->ic_header + count;
-		for (i = 0; i < split; i += BBSIZE) {
-			uint32_t cycle = be32_to_cpu(*(__be32 *)dptr);
-			if (++cycle == XLOG_HEADER_MAGIC_NUM)
-				cycle++;
-			*(__be32 *)dptr = cpu_to_be32(cycle);
-
-			dptr += BBSIZE;
-		}
-	} else {
-		iclog->ic_bwritecnt = 1;
+	/* Do we need to split this write into 2 parts? */
+	if (bno + BTOBB(count) > log->l_logBBsize) {
+		xlog_split_iclog(log, &iclog->ic_header, bno, count);
+		split = true;
 	}
 
 	/* calculcate the checksum */
@@ -1920,18 +1879,15 @@ xlog_sync(
 	 * write on I/O completion and shutdown the fs. The subsequent mount
 	 * detects the bad CRC and attempts to recover.
 	 */
+#ifdef DEBUG
 	if (XFS_TEST_ERROR(false, log->l_mp, XFS_ERRTAG_LOG_BAD_CRC)) {
 		iclog->ic_header.h_crc &= cpu_to_le32(0xAAAAAAAA);
-		iclog->ic_state |= XLOG_STATE_IOABORT;
+		iclog->ic_fail_crc = true;
 		xfs_warn(log->l_mp,
 	"Intentionally corrupted log record at LSN 0x%llx. Shutdown imminent.",
 			 be64_to_cpu(iclog->ic_header.h_lsn));
 	}
-
-	bp->b_io_length = BTOBB(count);
-	bp->b_log_item = iclog;
-	bp->b_flags &= ~XBF_FLUSH;
-	bp->b_flags |= (XBF_ASYNC | XBF_SYNCIO | XBF_WRITE | XBF_FUA);
+#endif
 
 	/*
 	 * Flush the data device before flushing the log to make sure all meta
@@ -1941,50 +1897,14 @@ xlog_sync(
 	 * synchronously here; for an internal log we can simply use the block
 	 * layer state machine for preflushes.
 	 */
-	if (log->l_mp->m_logdev_targp != log->l_mp->m_ddev_targp)
+	if (log->l_targ != log->l_mp->m_ddev_targp || split) {
 		xfs_blkdev_issue_flush(log->l_mp->m_ddev_targp);
-	else
-		bp->b_flags |= XBF_FLUSH;
-
-	ASSERT(XFS_BUF_ADDR(bp) <= log->l_logBBsize-1);
-	ASSERT(XFS_BUF_ADDR(bp) + BTOBB(count) <= log->l_logBBsize);
-
-	xlog_verify_iclog(log, iclog, count, true);
-
-	/* account for log which doesn't start at block #0 */
-	XFS_BUF_SET_ADDR(bp, XFS_BUF_ADDR(bp) + log->l_logBBstart);
-
-	/*
-	 * Don't call xfs_bwrite here. We do log-syncs even when the filesystem
-	 * is shutting down.
-	 */
-	error = xlog_bdstrat(bp);
-	if (error) {
-		xfs_buf_ioerror_alert(bp, "xlog_sync");
-		return error;
+		need_flush = false;
 	}
-	if (split) {
-		bp = iclog->ic_log->l_xbuf;
-		XFS_BUF_SET_ADDR(bp, 0);	     /* logical 0 */
-		xfs_buf_associate_memory(bp,
-				(char *)&iclog->ic_header + count, split);
-		bp->b_log_item = iclog;
-		bp->b_flags &= ~XBF_FLUSH;
-		bp->b_flags |= (XBF_ASYNC | XBF_SYNCIO | XBF_WRITE | XBF_FUA);
-
-		ASSERT(XFS_BUF_ADDR(bp) <= log->l_logBBsize-1);
-		ASSERT(XFS_BUF_ADDR(bp) + BTOBB(count) <= log->l_logBBsize);
-
-		/* account for internal log which doesn't start at block #0 */
-		XFS_BUF_SET_ADDR(bp, XFS_BUF_ADDR(bp) + log->l_logBBstart);
-		error = xlog_bdstrat(bp);
-		if (error) {
-			xfs_buf_ioerror_alert(bp, "xlog_sync (split)");
-			return error;
-		}
-	}
-	return 0;
-}	/* xlog_sync */
+
+	xlog_verify_iclog(log, iclog, count);
+	xlog_write_iclog(log, iclog, bno, count, need_flush);
+}
 
 /*
  * Deallocate a log structure
@@ -2004,31 +1924,21 @@ xlog_dealloc_log(
 	 */
 	iclog = log->l_iclog;
 	for (i = 0; i < log->l_iclog_bufs; i++) {
-		xfs_buf_lock(iclog->ic_bp);
-		xfs_buf_unlock(iclog->ic_bp);
+		down(&iclog->ic_sema);
+		up(&iclog->ic_sema);
 		iclog = iclog->ic_next;
 	}
 
-	/*
-	 * Always need to ensure that the extra buffer does not point to memory
-	 * owned by another log buffer before we free it. Also, cycle the lock
-	 * first to ensure we've completed IO on it.
-	 */
-	xfs_buf_lock(log->l_xbuf);
-	xfs_buf_unlock(log->l_xbuf);
-	xfs_buf_set_empty(log->l_xbuf, BTOBB(log->l_iclog_size));
-	xfs_buf_free(log->l_xbuf);
-
 	iclog = log->l_iclog;
 	for (i = 0; i < log->l_iclog_bufs; i++) {
-		xfs_buf_free(iclog->ic_bp);
 		next_iclog = iclog->ic_next;
+		kmem_free(iclog->ic_data);
 		kmem_free(iclog);
 		iclog = next_iclog;
 	}
-	spinlock_destroy(&log->l_icloglock);
 
 	log->l_mp->m_log = NULL;
+	destroy_workqueue(log->l_ioend_workqueue);
 	kmem_free(log);
 }	/* xlog_dealloc_log */
 
@@ -2068,7 +1978,7 @@ xlog_print_tic_res(
 
 	/* match with XLOG_REG_TYPE_* in xfs_log.h */
 #define REG_TYPE_STR(type, str)	[XLOG_REG_TYPE_##type] = str
-	static char *res_type_str[XLOG_REG_TYPE_MAX + 1] = {
+	static char *res_type_str[] = {
 	    REG_TYPE_STR(BFORMAT, "bformat"),
 	    REG_TYPE_STR(BCHUNK, "bchunk"),
 	    REG_TYPE_STR(EFI_FORMAT, "efi_format"),
@@ -2088,8 +1998,15 @@ xlog_print_tic_res(
 	    REG_TYPE_STR(UNMOUNT, "unmount"),
 	    REG_TYPE_STR(COMMIT, "commit"),
 	    REG_TYPE_STR(TRANSHDR, "trans header"),
-	    REG_TYPE_STR(ICREATE, "inode create")
+	    REG_TYPE_STR(ICREATE, "inode create"),
+	    REG_TYPE_STR(RUI_FORMAT, "rui_format"),
+	    REG_TYPE_STR(RUD_FORMAT, "rud_format"),
+	    REG_TYPE_STR(CUI_FORMAT, "cui_format"),
+	    REG_TYPE_STR(CUD_FORMAT, "cud_format"),
+	    REG_TYPE_STR(BUI_FORMAT, "bui_format"),
+	    REG_TYPE_STR(BUD_FORMAT, "bud_format"),
 	};
+	BUILD_BUG_ON(ARRAY_SIZE(res_type_str) != XLOG_REG_TYPE_MAX + 1);
 #undef REG_TYPE_STR
 
 	xfs_warn(mp, "ticket reservation summary:");
@@ -2602,7 +2519,7 @@ xlog_state_clean_log(
 		if (iclog->ic_state == XLOG_STATE_DIRTY) {
 			iclog->ic_state	= XLOG_STATE_ACTIVE;
 			iclog->ic_offset       = 0;
-			ASSERT(iclog->ic_callback == NULL);
+			ASSERT(list_empty_careful(&iclog->ic_callbacks));
 			/*
 			 * If the number of ops in this iclog indicate it just
 			 * contains the dummy transaction, we can
@@ -2672,37 +2589,32 @@ xlog_state_clean_log(
 
 STATIC xfs_lsn_t
 xlog_get_lowest_lsn(
-	struct xlog	*log)
+	struct xlog		*log)
 {
-	xlog_in_core_t  *lsn_log;
-	xfs_lsn_t	lowest_lsn, lsn;
+	struct xlog_in_core	*iclog = log->l_iclog;
+	xfs_lsn_t		lowest_lsn = 0, lsn;
 
-	lsn_log = log->l_iclog;
-	lowest_lsn = 0;
 	do {
-	    if (!(lsn_log->ic_state & (XLOG_STATE_ACTIVE|XLOG_STATE_DIRTY))) {
-		lsn = be64_to_cpu(lsn_log->ic_header.h_lsn);
-		if ((lsn && !lowest_lsn) ||
-		    (XFS_LSN_CMP(lsn, lowest_lsn) < 0)) {
+		if (iclog->ic_state & (XLOG_STATE_ACTIVE | XLOG_STATE_DIRTY))
+			continue;
+
+		lsn = be64_to_cpu(iclog->ic_header.h_lsn);
+		if ((lsn && !lowest_lsn) || XFS_LSN_CMP(lsn, lowest_lsn) < 0)
 			lowest_lsn = lsn;
-		}
-	    }
-	    lsn_log = lsn_log->ic_next;
-	} while (lsn_log != log->l_iclog);
+	} while ((iclog = iclog->ic_next) != log->l_iclog);
+
 	return lowest_lsn;
 }
 
-
 STATIC void
 xlog_state_do_callback(
 	struct xlog		*log,
-	int			aborted,
+	bool			aborted,
 	struct xlog_in_core	*ciclog)
 {
 	xlog_in_core_t	   *iclog;
 	xlog_in_core_t	   *first_iclog;	/* used to know when we've
 						 * processed all iclogs once */
-	xfs_log_callback_t *cb, *cb_next;
 	int		   flushcnt = 0;
 	xfs_lsn_t	   lowest_lsn;
 	int		   ioerrors;	/* counter: iclogs with errors */
@@ -2813,7 +2725,7 @@ xlog_state_do_callback(
 				 */
 				ASSERT(XFS_LSN_CMP(atomic64_read(&log->l_last_sync_lsn),
 					be64_to_cpu(iclog->ic_header.h_lsn)) <= 0);
-				if (iclog->ic_callback)
+				if (!list_empty_careful(&iclog->ic_callbacks))
 					atomic64_set(&log->l_last_sync_lsn,
 						be64_to_cpu(iclog->ic_header.h_lsn));
 
@@ -2830,26 +2742,20 @@ xlog_state_do_callback(
 			 * callbacks being added.
 			 */
 			spin_lock(&iclog->ic_callback_lock);
-			cb = iclog->ic_callback;
-			while (cb) {
-				iclog->ic_callback_tail = &(iclog->ic_callback);
-				iclog->ic_callback = NULL;
-				spin_unlock(&iclog->ic_callback_lock);
+			while (!list_empty(&iclog->ic_callbacks)) {
+				LIST_HEAD(tmp);
 
-				/* perform callbacks in the order given */
-				for (; cb; cb = cb_next) {
-					cb_next = cb->cb_next;
-					cb->cb_func(cb->cb_arg, aborted);
-				}
+				list_splice_init(&iclog->ic_callbacks, &tmp);
+
+				spin_unlock(&iclog->ic_callback_lock);
+				xlog_cil_process_committed(&tmp, aborted);
 				spin_lock(&iclog->ic_callback_lock);
-				cb = iclog->ic_callback;
 			}
 
 			loopdidcallbacks++;
 			funcdidcallbacks++;
 
 			spin_lock(&log->l_icloglock);
-			ASSERT(iclog->ic_callback == NULL);
 			spin_unlock(&iclog->ic_callback_lock);
 			if (!(iclog->ic_state & XLOG_STATE_IOERROR))
 				iclog->ic_state = XLOG_STATE_DIRTY;
@@ -2935,18 +2841,16 @@ xlog_state_do_callback(
  */
 STATIC void
 xlog_state_done_syncing(
-	xlog_in_core_t	*iclog,
-	int		aborted)
+	struct xlog_in_core	*iclog,
+	bool			aborted)
 {
-	struct xlog	   *log = iclog->ic_log;
+	struct xlog		*log = iclog->ic_log;
 
 	spin_lock(&log->l_icloglock);
 
 	ASSERT(iclog->ic_state == XLOG_STATE_SYNCING ||
 	       iclog->ic_state == XLOG_STATE_IOERROR);
 	ASSERT(atomic_read(&iclog->ic_refcnt) == 0);
-	ASSERT(iclog->ic_bwritecnt == 1 || iclog->ic_bwritecnt == 2);
-
 
 	/*
 	 * If we got an error, either on the first buffer, or in the case of
@@ -2954,13 +2858,8 @@ xlog_state_done_syncing(
 	 * and none should ever be attempted to be written to disk
 	 * again.
 	 */
-	if (iclog->ic_state != XLOG_STATE_IOERROR) {
-		if (--iclog->ic_bwritecnt == 1) {
-			spin_unlock(&log->l_icloglock);
-			return;
-		}
+	if (iclog->ic_state != XLOG_STATE_IOERROR)
 		iclog->ic_state = XLOG_STATE_DONE_SYNC;
-	}
 
 	/*
 	 * Someone could be sleeping prior to writing out the next
@@ -3229,7 +3128,7 @@ xlog_state_release_iclog(
 	 * flags after this point.
 	 */
 	if (sync)
-		return xlog_sync(log, iclog);
+		xlog_sync(log, iclog);
 	return 0;
 }	/* xlog_state_release_iclog */
 
@@ -3820,8 +3719,7 @@ STATIC void
 xlog_verify_iclog(
 	struct xlog		*log,
 	struct xlog_in_core	*iclog,
-	int			count,
-	bool                    syncing)
+	int			count)
 {
 	xlog_op_header_t	*ophead;
 	xlog_in_core_t		*icptr;
@@ -3865,7 +3763,7 @@ xlog_verify_iclog(
 		/* clientid is only 1 byte */
 		p = &ophead->oh_clientid;
 		field_offset = p - base_ptr;
-		if (!syncing || (field_offset & 0x1ff)) {
+		if (field_offset & 0x1ff) {
 			clientid = ophead->oh_clientid;
 		} else {
 			idx = BTOBBT((char *)&ophead->oh_clientid - iclog->ic_datap);
@@ -3888,7 +3786,7 @@ xlog_verify_iclog(
 		/* check length */
 		p = &ophead->oh_len;
 		field_offset = p - base_ptr;
-		if (!syncing || (field_offset & 0x1ff)) {
+		if (field_offset & 0x1ff) {
 			op_len = be32_to_cpu(ophead->oh_len);
 		} else {
 			idx = BTOBBT((uintptr_t)&ophead->oh_len -
@@ -4025,7 +3923,7 @@ xfs_log_force_umount(
 	 * avoid races.
 	 */
 	wake_up_all(&log->l_cilp->xc_commit_wait);
-	xlog_state_do_callback(log, XFS_LI_ABORTED, NULL);
+	xlog_state_do_callback(log, true, NULL);
 
 #ifdef XFSERRORDEBUG
 	{
diff --git a/fs/xfs/xfs_log.h b/fs/xfs/xfs_log.h
index 73a64bf32f6f..84e06805160f 100644
--- a/fs/xfs/xfs_log.h
+++ b/fs/xfs/xfs_log.h
@@ -6,6 +6,8 @@
 #ifndef	__XFS_LOG_H__
 #define __XFS_LOG_H__
 
+struct xfs_cil_ctx;
+
 struct xfs_log_vec {
 	struct xfs_log_vec	*lv_next;	/* next lv in build list */
 	int			lv_niovecs;	/* number of iovecs in lv */
@@ -72,16 +74,6 @@ xlog_copy_iovec(struct xfs_log_vec *lv, struct xfs_log_iovec **vecp,
 }
 
 /*
- * Structure used to pass callback function and the function's argument
- * to the log manager.
- */
-typedef struct xfs_log_callback {
-	struct xfs_log_callback	*cb_next;
-	void			(*cb_func)(void *, int);
-	void			*cb_arg;
-} xfs_log_callback_t;
-
-/*
  * By comparing each component, we don't have to worry about extra
  * endian issues in treating two 32 bit numbers as one 64 bit number
  */
@@ -125,12 +117,10 @@ int	  xfs_log_mount(struct xfs_mount	*mp,
 			xfs_daddr_t		start_block,
 			int		 	num_bblocks);
 int	  xfs_log_mount_finish(struct xfs_mount *mp);
-int	xfs_log_mount_cancel(struct xfs_mount *);
+void	xfs_log_mount_cancel(struct xfs_mount *);
 xfs_lsn_t xlog_assign_tail_lsn(struct xfs_mount *mp);
 xfs_lsn_t xlog_assign_tail_lsn_locked(struct xfs_mount *mp);
 void	  xfs_log_space_wake(struct xfs_mount *mp);
-int	  xfs_log_notify(struct xlog_in_core	*iclog,
-			 struct xfs_log_callback *callback_entry);
 int	  xfs_log_release_iclog(struct xfs_mount *mp,
 			 struct xlog_in_core	 *iclog);
 int	  xfs_log_reserve(struct xfs_mount *mp,
@@ -148,6 +138,7 @@ void	  xfs_log_ticket_put(struct xlog_ticket *ticket);
 
 void	xfs_log_commit_cil(struct xfs_mount *mp, struct xfs_trans *tp,
 				xfs_lsn_t *commit_lsn, bool regrant);
+void	xlog_cil_process_committed(struct list_head *list, bool aborted);
 bool	xfs_log_item_in_current_chkpt(struct xfs_log_item *lip);
 
 void	xfs_log_work_queue(struct xfs_mount *mp);
diff --git a/fs/xfs/xfs_log_cil.c b/fs/xfs/xfs_log_cil.c
index d3884e08b43c..fa5602d0fd7f 100644
--- a/fs/xfs/xfs_log_cil.c
+++ b/fs/xfs/xfs_log_cil.c
@@ -10,10 +10,7 @@
 #include "xfs_shared.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_error.h"
-#include "xfs_alloc.h"
 #include "xfs_extent_busy.h"
-#include "xfs_discard.h"
 #include "xfs_trans.h"
 #include "xfs_trans_priv.h"
 #include "xfs_log.h"
@@ -246,7 +243,8 @@ xfs_cil_prepare_item(
 	 * shadow buffer, so update the the pointer to it appropriately.
 	 */
 	if (!old_lv) {
-		lv->lv_item->li_ops->iop_pin(lv->lv_item);
+		if (lv->lv_item->li_ops->iop_pin)
+			lv->lv_item->li_ops->iop_pin(lv->lv_item);
 		lv->lv_item->li_lv_shadow = NULL;
 	} else if (old_lv != lv) {
 		ASSERT(lv->lv_buf_len != XFS_LOG_VEC_ORDERED);
@@ -576,12 +574,24 @@ xlog_discard_busy_extents(
  */
 static void
 xlog_cil_committed(
-	void	*args,
-	int	abort)
+	struct xfs_cil_ctx	*ctx,
+	bool			abort)
 {
-	struct xfs_cil_ctx	*ctx = args;
 	struct xfs_mount	*mp = ctx->cil->xc_log->l_mp;
 
+	/*
+	 * If the I/O failed, we're aborting the commit and already shutdown.
+	 * Wake any commit waiters before aborting the log items so we don't
+	 * block async log pushers on callbacks. Async log pushers explicitly do
+	 * not wait on log force completion because they may be holding locks
+	 * required to unpin items.
+	 */
+	if (abort) {
+		spin_lock(&ctx->cil->xc_push_lock);
+		wake_up_all(&ctx->cil->xc_commit_wait);
+		spin_unlock(&ctx->cil->xc_push_lock);
+	}
+
 	xfs_trans_committed_bulk(ctx->cil->xc_log->l_ailp, ctx->lv_chain,
 					ctx->start_lsn, abort);
 
@@ -589,15 +599,7 @@ xlog_cil_committed(
 	xfs_extent_busy_clear(mp, &ctx->busy_extents,
 			     (mp->m_flags & XFS_MOUNT_DISCARD) && !abort);
 
-	/*
-	 * If we are aborting the commit, wake up anyone waiting on the
-	 * committing list.  If we don't, then a shutdown we can leave processes
-	 * waiting in xlog_cil_force_lsn() waiting on a sequence commit that
-	 * will never happen because we aborted it.
-	 */
 	spin_lock(&ctx->cil->xc_push_lock);
-	if (abort)
-		wake_up_all(&ctx->cil->xc_commit_wait);
 	list_del(&ctx->committing);
 	spin_unlock(&ctx->cil->xc_push_lock);
 
@@ -609,6 +611,20 @@ xlog_cil_committed(
 		kmem_free(ctx);
 }
 
+void
+xlog_cil_process_committed(
+	struct list_head	*list,
+	bool			aborted)
+{
+	struct xfs_cil_ctx	*ctx;
+
+	while ((ctx = list_first_entry_or_null(list,
+			struct xfs_cil_ctx, iclog_entry))) {
+		list_del(&ctx->iclog_entry);
+		xlog_cil_committed(ctx, aborted);
+	}
+}
+
 /*
  * Push the Committed Item List to the log. If @push_seq flag is zero, then it
  * is a background flush and so we can chose to ignore it. Otherwise, if the
@@ -830,12 +846,15 @@ restart:
 	if (commit_lsn == -1)
 		goto out_abort;
 
-	/* attach all the transactions w/ busy extents to iclog */
-	ctx->log_cb.cb_func = xlog_cil_committed;
-	ctx->log_cb.cb_arg = ctx;
-	error = xfs_log_notify(commit_iclog, &ctx->log_cb);
-	if (error)
+	spin_lock(&commit_iclog->ic_callback_lock);
+	if (commit_iclog->ic_state & XLOG_STATE_IOERROR) {
+		spin_unlock(&commit_iclog->ic_callback_lock);
 		goto out_abort;
+	}
+	ASSERT_ALWAYS(commit_iclog->ic_state == XLOG_STATE_ACTIVE ||
+		      commit_iclog->ic_state == XLOG_STATE_WANT_SYNC);
+	list_add_tail(&ctx->iclog_entry, &commit_iclog->ic_callbacks);
+	spin_unlock(&commit_iclog->ic_callback_lock);
 
 	/*
 	 * now the checkpoint commit is complete and we've attached the
@@ -859,7 +878,7 @@ out_skip:
 out_abort_free_ticket:
 	xfs_log_ticket_put(tic);
 out_abort:
-	xlog_cil_committed(ctx, XFS_LI_ABORTED);
+	xlog_cil_committed(ctx, true);
 	return -EIO;
 }
 
@@ -979,6 +998,7 @@ xfs_log_commit_cil(
 {
 	struct xlog		*log = mp->m_log;
 	struct xfs_cil		*cil = log->l_cilp;
+	struct xfs_log_item	*lip, *next;
 	xfs_lsn_t		xc_commit_lsn;
 
 	/*
@@ -1003,7 +1023,7 @@ xfs_log_commit_cil(
 
 	/*
 	 * Once all the items of the transaction have been copied to the CIL,
-	 * the items can be unlocked and freed.
+	 * the items can be unlocked and possibly freed.
 	 *
 	 * This needs to be done before we drop the CIL context lock because we
 	 * have to update state in the log items and unlock them before they go
@@ -1012,8 +1032,12 @@ xfs_log_commit_cil(
 	 * the log items. This affects (at least) processing of stale buffers,
 	 * inodes and EFIs.
 	 */
-	xfs_trans_free_items(tp, xc_commit_lsn, false);
-
+	trace_xfs_trans_commit_items(tp, _RET_IP_);
+	list_for_each_entry_safe(lip, next, &tp->t_items, li_trans) {
+		xfs_trans_del_item(lip);
+		if (lip->li_ops->iop_committing)
+			lip->li_ops->iop_committing(lip, xc_commit_lsn);
+	}
 	xlog_cil_push_background(log);
 
 	up_read(&cil->xc_ctx_lock);
diff --git a/fs/xfs/xfs_log_priv.h b/fs/xfs/xfs_log_priv.h
index b5f82cb36202..b880c23cb6e4 100644
--- a/fs/xfs/xfs_log_priv.h
+++ b/fs/xfs/xfs_log_priv.h
@@ -10,7 +10,6 @@ struct xfs_buf;
 struct xlog;
 struct xlog_ticket;
 struct xfs_mount;
-struct xfs_log_callback;
 
 /*
  * Flags for log structure
@@ -50,7 +49,6 @@ static inline uint xlog_get_client_id(__be32 i)
 #define XLOG_STATE_CALLBACK  0x0020 /* Callback functions now */
 #define XLOG_STATE_DIRTY     0x0040 /* Dirty IC log, not ready for ACTIVE status*/
 #define XLOG_STATE_IOERROR   0x0080 /* IO error happened in sync'ing log */
-#define XLOG_STATE_IOABORT   0x0100 /* force abort on I/O completion (debug) */
 #define XLOG_STATE_ALL	     0x7FFF /* All possible valid flags */
 #define XLOG_STATE_NOTUSED   0x8000 /* This IC log not being used */
 
@@ -179,11 +177,10 @@ typedef struct xlog_ticket {
  *	the iclog.
  * - ic_forcewait is used to implement synchronous forcing of the iclog to disk.
  * - ic_next is the pointer to the next iclog in the ring.
- * - ic_bp is a pointer to the buffer used to write this incore log to disk.
  * - ic_log is a pointer back to the global log structure.
- * - ic_callback is a linked list of callback function/argument pairs to be
- *	called after an iclog finishes writing.
- * - ic_size is the full size of the header plus data.
+ * - ic_size is the full size of the log buffer, minus the cycle headers.
+ * - ic_io_size is the size of the currently pending log buffer write, which
+ *	might be smaller than ic_size
  * - ic_offset is the current number of bytes written to in this iclog.
  * - ic_refcnt is bumped when someone is writing to the log.
  * - ic_state is the state of the iclog.
@@ -193,7 +190,7 @@ typedef struct xlog_ticket {
  * structure cacheline aligned. The following fields can be contended on
  * by independent processes:
  *
- *	- ic_callback_*
+ *	- ic_callbacks
  *	- ic_refcnt
  *	- fields protected by the global l_icloglock
  *
@@ -206,23 +203,28 @@ typedef struct xlog_in_core {
 	wait_queue_head_t	ic_write_wait;
 	struct xlog_in_core	*ic_next;
 	struct xlog_in_core	*ic_prev;
-	struct xfs_buf		*ic_bp;
 	struct xlog		*ic_log;
-	int			ic_size;
-	int			ic_offset;
-	int			ic_bwritecnt;
+	u32			ic_size;
+	u32			ic_io_size;
+	u32			ic_offset;
 	unsigned short		ic_state;
 	char			*ic_datap;	/* pointer to iclog data */
 
 	/* Callback structures need their own cacheline */
 	spinlock_t		ic_callback_lock ____cacheline_aligned_in_smp;
-	struct xfs_log_callback	*ic_callback;
-	struct xfs_log_callback	**ic_callback_tail;
+	struct list_head	ic_callbacks;
 
 	/* reference counts need their own cacheline */
 	atomic_t		ic_refcnt ____cacheline_aligned_in_smp;
 	xlog_in_core_2_t	*ic_data;
 #define ic_header	ic_data->hic_header
+#ifdef DEBUG
+	bool			ic_fail_crc : 1;
+#endif
+	struct semaphore	ic_sema;
+	struct work_struct	ic_end_io_work;
+	struct bio		ic_bio;
+	struct bio_vec		ic_bvec[];
 } xlog_in_core_t;
 
 /*
@@ -243,7 +245,7 @@ struct xfs_cil_ctx {
 	int			space_used;	/* aggregate size of regions */
 	struct list_head	busy_extents;	/* busy extents in chkpt */
 	struct xfs_log_vec	*lv_chain;	/* logvecs being pushed */
-	struct xfs_log_callback	log_cb;		/* completion callback hook. */
+	struct list_head	iclog_entry;
 	struct list_head	committing;	/* ctx committing list */
 	struct work_struct	discard_endio_work;
 };
@@ -350,9 +352,8 @@ struct xlog {
 	struct xfs_mount	*l_mp;	        /* mount point */
 	struct xfs_ail		*l_ailp;	/* AIL log is working with */
 	struct xfs_cil		*l_cilp;	/* CIL log is working with */
-	struct xfs_buf		*l_xbuf;        /* extra buffer for log
-						 * wrapping */
 	struct xfs_buftarg	*l_targ;        /* buftarg of log */
+	struct workqueue_struct	*l_ioend_workqueue; /* for I/O completions */
 	struct delayed_work	l_work;		/* background flush work */
 	uint			l_flags;
 	uint			l_quotaoffs_flag; /* XFS_DQ_*, for QUOTAOFFs */
@@ -361,7 +362,6 @@ struct xlog {
 	int			l_iclog_heads;  /* # of iclog header sectors */
 	uint			l_sectBBsize;   /* sector size in BBs (2^n) */
 	int			l_iclog_size;	/* size of log in bytes */
-	int			l_iclog_size_log; /* log power size of log */
 	int			l_iclog_bufs;	/* number of iclog buffers */
 	xfs_daddr_t		l_logBBstart;   /* start block of log */
 	int			l_logsize;      /* size of log in bytes */
@@ -418,7 +418,7 @@ xlog_recover(
 extern int
 xlog_recover_finish(
 	struct xlog		*log);
-extern int
+extern void
 xlog_recover_cancel(struct xlog *);
 
 extern __le32	 xlog_cksum(struct xlog *log, struct xlog_rec_header *rhead,
diff --git a/fs/xfs/xfs_log_recover.c b/fs/xfs/xfs_log_recover.c
index 9fe88d125f0a..13d1d3e95b88 100644
--- a/fs/xfs/xfs_log_recover.c
+++ b/fs/xfs/xfs_log_recover.c
@@ -13,8 +13,6 @@
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
 #include "xfs_log.h"
@@ -26,7 +24,6 @@
 #include "xfs_alloc.h"
 #include "xfs_ialloc.h"
 #include "xfs_quota.h"
-#include "xfs_cksum.h"
 #include "xfs_trace.h"
 #include "xfs_icache.h"
 #include "xfs_bmap_btree.h"
@@ -79,7 +76,7 @@ struct xfs_buf_cancel {
  * are valid, false otherwise.
  */
 static inline bool
-xlog_verify_bp(
+xlog_verify_bno(
 	struct xlog	*log,
 	xfs_daddr_t	blk_no,
 	int		bbcount)
@@ -92,22 +89,19 @@ xlog_verify_bp(
 }
 
 /*
- * Allocate a buffer to hold log data.  The buffer needs to be able
- * to map to a range of nbblks basic blocks at any valid (basic
- * block) offset within the log.
+ * Allocate a buffer to hold log data.  The buffer needs to be able to map to
+ * a range of nbblks basic blocks at any valid offset within the log.
  */
-STATIC xfs_buf_t *
-xlog_get_bp(
+static char *
+xlog_alloc_buffer(
 	struct xlog	*log,
 	int		nbblks)
 {
-	struct xfs_buf	*bp;
-
 	/*
 	 * Pass log block 0 since we don't have an addr yet, buffer will be
 	 * verified on read.
 	 */
-	if (!xlog_verify_bp(log, 0, nbblks)) {
+	if (!xlog_verify_bno(log, 0, nbblks)) {
 		xfs_warn(log->l_mp, "Invalid block length (0x%x) for buffer",
 			nbblks);
 		XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
@@ -115,69 +109,48 @@ xlog_get_bp(
 	}
 
 	/*
-	 * We do log I/O in units of log sectors (a power-of-2
-	 * multiple of the basic block size), so we round up the
-	 * requested size to accommodate the basic blocks required
-	 * for complete log sectors.
+	 * We do log I/O in units of log sectors (a power-of-2 multiple of the
+	 * basic block size), so we round up the requested size to accommodate
+	 * the basic blocks required for complete log sectors.
 	 *
-	 * In addition, the buffer may be used for a non-sector-
-	 * aligned block offset, in which case an I/O of the
-	 * requested size could extend beyond the end of the
-	 * buffer.  If the requested size is only 1 basic block it
-	 * will never straddle a sector boundary, so this won't be
-	 * an issue.  Nor will this be a problem if the log I/O is
-	 * done in basic blocks (sector size 1).  But otherwise we
-	 * extend the buffer by one extra log sector to ensure
-	 * there's space to accommodate this possibility.
+	 * In addition, the buffer may be used for a non-sector-aligned block
+	 * offset, in which case an I/O of the requested size could extend
+	 * beyond the end of the buffer.  If the requested size is only 1 basic
+	 * block it will never straddle a sector boundary, so this won't be an
+	 * issue.  Nor will this be a problem if the log I/O is done in basic
+	 * blocks (sector size 1).  But otherwise we extend the buffer by one
+	 * extra log sector to ensure there's space to accommodate this
+	 * possibility.
 	 */
 	if (nbblks > 1 && log->l_sectBBsize > 1)
 		nbblks += log->l_sectBBsize;
 	nbblks = round_up(nbblks, log->l_sectBBsize);
-
-	bp = xfs_buf_get_uncached(log->l_mp->m_logdev_targp, nbblks, 0);
-	if (bp)
-		xfs_buf_unlock(bp);
-	return bp;
-}
-
-STATIC void
-xlog_put_bp(
-	xfs_buf_t	*bp)
-{
-	xfs_buf_free(bp);
+	return kmem_alloc_large(BBTOB(nbblks), KM_MAYFAIL);
 }
 
 /*
  * Return the address of the start of the given block number's data
  * in a log buffer.  The buffer covers a log sector-aligned region.
  */
-STATIC char *
+static inline unsigned int
 xlog_align(
 	struct xlog	*log,
-	xfs_daddr_t	blk_no,
-	int		nbblks,
-	struct xfs_buf	*bp)
+	xfs_daddr_t	blk_no)
 {
-	xfs_daddr_t	offset = blk_no & ((xfs_daddr_t)log->l_sectBBsize - 1);
-
-	ASSERT(offset + nbblks <= bp->b_length);
-	return bp->b_addr + BBTOB(offset);
+	return BBTOB(blk_no & ((xfs_daddr_t)log->l_sectBBsize - 1));
 }
 
-
-/*
- * nbblks should be uint, but oh well.  Just want to catch that 32-bit length.
- */
-STATIC int
-xlog_bread_noalign(
-	struct xlog	*log,
-	xfs_daddr_t	blk_no,
-	int		nbblks,
-	struct xfs_buf	*bp)
+static int
+xlog_do_io(
+	struct xlog		*log,
+	xfs_daddr_t		blk_no,
+	unsigned int		nbblks,
+	char			*data,
+	unsigned int		op)
 {
-	int		error;
+	int			error;
 
-	if (!xlog_verify_bp(log, blk_no, nbblks)) {
+	if (!xlog_verify_bno(log, blk_no, nbblks)) {
 		xfs_warn(log->l_mp,
 			 "Invalid log block/length (0x%llx, 0x%x) for buffer",
 			 blk_no, nbblks);
@@ -187,107 +160,53 @@ xlog_bread_noalign(
 
 	blk_no = round_down(blk_no, log->l_sectBBsize);
 	nbblks = round_up(nbblks, log->l_sectBBsize);
-
 	ASSERT(nbblks > 0);
-	ASSERT(nbblks <= bp->b_length);
-
-	XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no);
-	bp->b_flags |= XBF_READ;
-	bp->b_io_length = nbblks;
-	bp->b_error = 0;
 
-	error = xfs_buf_submit(bp);
-	if (error && !XFS_FORCED_SHUTDOWN(log->l_mp))
-		xfs_buf_ioerror_alert(bp, __func__);
+	error = xfs_rw_bdev(log->l_targ->bt_bdev, log->l_logBBstart + blk_no,
+			BBTOB(nbblks), data, op);
+	if (error && !XFS_FORCED_SHUTDOWN(log->l_mp)) {
+		xfs_alert(log->l_mp,
+			  "log recovery %s I/O error at daddr 0x%llx len %d error %d",
+			  op == REQ_OP_WRITE ? "write" : "read",
+			  blk_no, nbblks, error);
+	}
 	return error;
 }
 
 STATIC int
-xlog_bread(
+xlog_bread_noalign(
 	struct xlog	*log,
 	xfs_daddr_t	blk_no,
 	int		nbblks,
-	struct xfs_buf	*bp,
-	char		**offset)
+	char		*data)
 {
-	int		error;
-
-	error = xlog_bread_noalign(log, blk_no, nbblks, bp);
-	if (error)
-		return error;
-
-	*offset = xlog_align(log, blk_no, nbblks, bp);
-	return 0;
+	return xlog_do_io(log, blk_no, nbblks, data, REQ_OP_READ);
 }
 
-/*
- * Read at an offset into the buffer. Returns with the buffer in it's original
- * state regardless of the result of the read.
- */
 STATIC int
-xlog_bread_offset(
+xlog_bread(
 	struct xlog	*log,
-	xfs_daddr_t	blk_no,		/* block to read from */
-	int		nbblks,		/* blocks to read */
-	struct xfs_buf	*bp,
-	char		*offset)
+	xfs_daddr_t	blk_no,
+	int		nbblks,
+	char		*data,
+	char		**offset)
 {
-	char		*orig_offset = bp->b_addr;
-	int		orig_len = BBTOB(bp->b_length);
-	int		error, error2;
-
-	error = xfs_buf_associate_memory(bp, offset, BBTOB(nbblks));
-	if (error)
-		return error;
-
-	error = xlog_bread_noalign(log, blk_no, nbblks, bp);
+	int		error;
 
-	/* must reset buffer pointer even on error */
-	error2 = xfs_buf_associate_memory(bp, orig_offset, orig_len);
-	if (error)
-		return error;
-	return error2;
+	error = xlog_do_io(log, blk_no, nbblks, data, REQ_OP_READ);
+	if (!error)
+		*offset = data + xlog_align(log, blk_no);
+	return error;
 }
 
-/*
- * Write out the buffer at the given block for the given number of blocks.
- * The buffer is kept locked across the write and is returned locked.
- * This can only be used for synchronous log writes.
- */
 STATIC int
 xlog_bwrite(
 	struct xlog	*log,
 	xfs_daddr_t	blk_no,
 	int		nbblks,
-	struct xfs_buf	*bp)
+	char		*data)
 {
-	int		error;
-
-	if (!xlog_verify_bp(log, blk_no, nbblks)) {
-		xfs_warn(log->l_mp,
-			 "Invalid log block/length (0x%llx, 0x%x) for buffer",
-			 blk_no, nbblks);
-		XFS_ERROR_REPORT(__func__, XFS_ERRLEVEL_HIGH, log->l_mp);
-		return -EFSCORRUPTED;
-	}
-
-	blk_no = round_down(blk_no, log->l_sectBBsize);
-	nbblks = round_up(nbblks, log->l_sectBBsize);
-
-	ASSERT(nbblks > 0);
-	ASSERT(nbblks <= bp->b_length);
-
-	XFS_BUF_SET_ADDR(bp, log->l_logBBstart + blk_no);
-	xfs_buf_hold(bp);
-	xfs_buf_lock(bp);
-	bp->b_io_length = nbblks;
-	bp->b_error = 0;
-
-	error = xfs_bwrite(bp);
-	if (error)
-		xfs_buf_ioerror_alert(bp, __func__);
-	xfs_buf_relse(bp);
-	return error;
+	return xlog_do_io(log, blk_no, nbblks, data, REQ_OP_WRITE);
 }
 
 #ifdef DEBUG
@@ -377,10 +296,9 @@ xlog_recover_iodone(
 		 * We're not going to bother about retrying
 		 * this during recovery. One strike!
 		 */
-		if (!XFS_FORCED_SHUTDOWN(bp->b_target->bt_mount)) {
+		if (!XFS_FORCED_SHUTDOWN(bp->b_mount)) {
 			xfs_buf_ioerror_alert(bp, __func__);
-			xfs_force_shutdown(bp->b_target->bt_mount,
-						SHUTDOWN_META_IO_ERROR);
+			xfs_force_shutdown(bp->b_mount, SHUTDOWN_META_IO_ERROR);
 		}
 	}
 
@@ -405,7 +323,7 @@ xlog_recover_iodone(
 STATIC int
 xlog_find_cycle_start(
 	struct xlog	*log,
-	struct xfs_buf	*bp,
+	char		*buffer,
 	xfs_daddr_t	first_blk,
 	xfs_daddr_t	*last_blk,
 	uint		cycle)
@@ -419,7 +337,7 @@ xlog_find_cycle_start(
 	end_blk = *last_blk;
 	mid_blk = BLK_AVG(first_blk, end_blk);
 	while (mid_blk != first_blk && mid_blk != end_blk) {
-		error = xlog_bread(log, mid_blk, 1, bp, &offset);
+		error = xlog_bread(log, mid_blk, 1, buffer, &offset);
 		if (error)
 			return error;
 		mid_cycle = xlog_get_cycle(offset);
@@ -455,7 +373,7 @@ xlog_find_verify_cycle(
 {
 	xfs_daddr_t	i, j;
 	uint		cycle;
-	xfs_buf_t	*bp;
+	char		*buffer;
 	xfs_daddr_t	bufblks;
 	char		*buf = NULL;
 	int		error = 0;
@@ -469,7 +387,7 @@ xlog_find_verify_cycle(
 	bufblks = 1 << ffs(nbblks);
 	while (bufblks > log->l_logBBsize)
 		bufblks >>= 1;
-	while (!(bp = xlog_get_bp(log, bufblks))) {
+	while (!(buffer = xlog_alloc_buffer(log, bufblks))) {
 		bufblks >>= 1;
 		if (bufblks < log->l_sectBBsize)
 			return -ENOMEM;
@@ -480,7 +398,7 @@ xlog_find_verify_cycle(
 
 		bcount = min(bufblks, (start_blk + nbblks - i));
 
-		error = xlog_bread(log, i, bcount, bp, &buf);
+		error = xlog_bread(log, i, bcount, buffer, &buf);
 		if (error)
 			goto out;
 
@@ -498,7 +416,7 @@ xlog_find_verify_cycle(
 	*new_blk = -1;
 
 out:
-	xlog_put_bp(bp);
+	kmem_free(buffer);
 	return error;
 }
 
@@ -522,7 +440,7 @@ xlog_find_verify_log_record(
 	int			extra_bblks)
 {
 	xfs_daddr_t		i;
-	xfs_buf_t		*bp;
+	char			*buffer;
 	char			*offset = NULL;
 	xlog_rec_header_t	*head = NULL;
 	int			error = 0;
@@ -532,12 +450,14 @@ xlog_find_verify_log_record(
 
 	ASSERT(start_blk != 0 || *last_blk != start_blk);
 
-	if (!(bp = xlog_get_bp(log, num_blks))) {
-		if (!(bp = xlog_get_bp(log, 1)))
+	buffer = xlog_alloc_buffer(log, num_blks);
+	if (!buffer) {
+		buffer = xlog_alloc_buffer(log, 1);
+		if (!buffer)
 			return -ENOMEM;
 		smallmem = 1;
 	} else {
-		error = xlog_bread(log, start_blk, num_blks, bp, &offset);
+		error = xlog_bread(log, start_blk, num_blks, buffer, &offset);
 		if (error)
 			goto out;
 		offset += ((num_blks - 1) << BBSHIFT);
@@ -554,7 +474,7 @@ xlog_find_verify_log_record(
 		}
 
 		if (smallmem) {
-			error = xlog_bread(log, i, 1, bp, &offset);
+			error = xlog_bread(log, i, 1, buffer, &offset);
 			if (error)
 				goto out;
 		}
@@ -607,7 +527,7 @@ xlog_find_verify_log_record(
 		*last_blk = i;
 
 out:
-	xlog_put_bp(bp);
+	kmem_free(buffer);
 	return error;
 }
 
@@ -629,7 +549,7 @@ xlog_find_head(
 	struct xlog	*log,
 	xfs_daddr_t	*return_head_blk)
 {
-	xfs_buf_t	*bp;
+	char		*buffer;
 	char		*offset;
 	xfs_daddr_t	new_blk, first_blk, start_blk, last_blk, head_blk;
 	int		num_scan_bblks;
@@ -659,20 +579,20 @@ xlog_find_head(
 	}
 
 	first_blk = 0;			/* get cycle # of 1st block */
-	bp = xlog_get_bp(log, 1);
-	if (!bp)
+	buffer = xlog_alloc_buffer(log, 1);
+	if (!buffer)
 		return -ENOMEM;
 
-	error = xlog_bread(log, 0, 1, bp, &offset);
+	error = xlog_bread(log, 0, 1, buffer, &offset);
 	if (error)
-		goto bp_err;
+		goto out_free_buffer;
 
 	first_half_cycle = xlog_get_cycle(offset);
 
 	last_blk = head_blk = log_bbnum - 1;	/* get cycle # of last block */
-	error = xlog_bread(log, last_blk, 1, bp, &offset);
+	error = xlog_bread(log, last_blk, 1, buffer, &offset);
 	if (error)
-		goto bp_err;
+		goto out_free_buffer;
 
 	last_half_cycle = xlog_get_cycle(offset);
 	ASSERT(last_half_cycle != 0);
@@ -740,9 +660,10 @@ xlog_find_head(
 		 *                           ^ we want to locate this spot
 		 */
 		stop_on_cycle = last_half_cycle;
-		if ((error = xlog_find_cycle_start(log, bp, first_blk,
-						&head_blk, last_half_cycle)))
-			goto bp_err;
+		error = xlog_find_cycle_start(log, buffer, first_blk, &head_blk,
+				last_half_cycle);
+		if (error)
+			goto out_free_buffer;
 	}
 
 	/*
@@ -762,7 +683,7 @@ xlog_find_head(
 		if ((error = xlog_find_verify_cycle(log,
 						start_blk, num_scan_bblks,
 						stop_on_cycle, &new_blk)))
-			goto bp_err;
+			goto out_free_buffer;
 		if (new_blk != -1)
 			head_blk = new_blk;
 	} else {		/* need to read 2 parts of log */
@@ -799,7 +720,7 @@ xlog_find_head(
 		if ((error = xlog_find_verify_cycle(log, start_blk,
 					num_scan_bblks - (int)head_blk,
 					(stop_on_cycle - 1), &new_blk)))
-			goto bp_err;
+			goto out_free_buffer;
 		if (new_blk != -1) {
 			head_blk = new_blk;
 			goto validate_head;
@@ -815,7 +736,7 @@ xlog_find_head(
 		if ((error = xlog_find_verify_cycle(log,
 					start_blk, (int)head_blk,
 					stop_on_cycle, &new_blk)))
-			goto bp_err;
+			goto out_free_buffer;
 		if (new_blk != -1)
 			head_blk = new_blk;
 	}
@@ -834,13 +755,13 @@ validate_head:
 		if (error == 1)
 			error = -EIO;
 		if (error)
-			goto bp_err;
+			goto out_free_buffer;
 	} else {
 		start_blk = 0;
 		ASSERT(head_blk <= INT_MAX);
 		error = xlog_find_verify_log_record(log, start_blk, &head_blk, 0);
 		if (error < 0)
-			goto bp_err;
+			goto out_free_buffer;
 		if (error == 1) {
 			/* We hit the beginning of the log during our search */
 			start_blk = log_bbnum - (num_scan_bblks - head_blk);
@@ -853,14 +774,14 @@ validate_head:
 			if (error == 1)
 				error = -EIO;
 			if (error)
-				goto bp_err;
+				goto out_free_buffer;
 			if (new_blk != log_bbnum)
 				head_blk = new_blk;
 		} else if (error)
-			goto bp_err;
+			goto out_free_buffer;
 	}
 
-	xlog_put_bp(bp);
+	kmem_free(buffer);
 	if (head_blk == log_bbnum)
 		*return_head_blk = 0;
 	else
@@ -873,9 +794,8 @@ validate_head:
 	 */
 	return 0;
 
- bp_err:
-	xlog_put_bp(bp);
-
+out_free_buffer:
+	kmem_free(buffer);
 	if (error)
 		xfs_warn(log->l_mp, "failed to find log head");
 	return error;
@@ -895,7 +815,7 @@ xlog_rseek_logrec_hdr(
 	xfs_daddr_t		head_blk,
 	xfs_daddr_t		tail_blk,
 	int			count,
-	struct xfs_buf		*bp,
+	char			*buffer,
 	xfs_daddr_t		*rblk,
 	struct xlog_rec_header	**rhead,
 	bool			*wrapped)
@@ -914,7 +834,7 @@ xlog_rseek_logrec_hdr(
 	 */
 	end_blk = head_blk > tail_blk ? tail_blk : 0;
 	for (i = (int) head_blk - 1; i >= end_blk; i--) {
-		error = xlog_bread(log, i, 1, bp, &offset);
+		error = xlog_bread(log, i, 1, buffer, &offset);
 		if (error)
 			goto out_error;
 
@@ -933,7 +853,7 @@ xlog_rseek_logrec_hdr(
 	 */
 	if (tail_blk >= head_blk && found != count) {
 		for (i = log->l_logBBsize - 1; i >= (int) tail_blk; i--) {
-			error = xlog_bread(log, i, 1, bp, &offset);
+			error = xlog_bread(log, i, 1, buffer, &offset);
 			if (error)
 				goto out_error;
 
@@ -969,7 +889,7 @@ xlog_seek_logrec_hdr(
 	xfs_daddr_t		head_blk,
 	xfs_daddr_t		tail_blk,
 	int			count,
-	struct xfs_buf		*bp,
+	char			*buffer,
 	xfs_daddr_t		*rblk,
 	struct xlog_rec_header	**rhead,
 	bool			*wrapped)
@@ -988,7 +908,7 @@ xlog_seek_logrec_hdr(
 	 */
 	end_blk = head_blk > tail_blk ? head_blk : log->l_logBBsize - 1;
 	for (i = (int) tail_blk; i <= end_blk; i++) {
-		error = xlog_bread(log, i, 1, bp, &offset);
+		error = xlog_bread(log, i, 1, buffer, &offset);
 		if (error)
 			goto out_error;
 
@@ -1006,7 +926,7 @@ xlog_seek_logrec_hdr(
 	 */
 	if (tail_blk > head_blk && found != count) {
 		for (i = 0; i < (int) head_blk; i++) {
-			error = xlog_bread(log, i, 1, bp, &offset);
+			error = xlog_bread(log, i, 1, buffer, &offset);
 			if (error)
 				goto out_error;
 
@@ -1069,22 +989,22 @@ xlog_verify_tail(
 	int			hsize)
 {
 	struct xlog_rec_header	*thead;
-	struct xfs_buf		*bp;
+	char			*buffer;
 	xfs_daddr_t		first_bad;
 	int			error = 0;
 	bool			wrapped;
 	xfs_daddr_t		tmp_tail;
 	xfs_daddr_t		orig_tail = *tail_blk;
 
-	bp = xlog_get_bp(log, 1);
-	if (!bp)
+	buffer = xlog_alloc_buffer(log, 1);
+	if (!buffer)
 		return -ENOMEM;
 
 	/*
 	 * Make sure the tail points to a record (returns positive count on
 	 * success).
 	 */
-	error = xlog_seek_logrec_hdr(log, head_blk, *tail_blk, 1, bp,
+	error = xlog_seek_logrec_hdr(log, head_blk, *tail_blk, 1, buffer,
 			&tmp_tail, &thead, &wrapped);
 	if (error < 0)
 		goto out;
@@ -1113,8 +1033,8 @@ xlog_verify_tail(
 			break;
 
 		/* skip to the next record; returns positive count on success */
-		error = xlog_seek_logrec_hdr(log, head_blk, first_bad, 2, bp,
-				&tmp_tail, &thead, &wrapped);
+		error = xlog_seek_logrec_hdr(log, head_blk, first_bad, 2,
+				buffer, &tmp_tail, &thead, &wrapped);
 		if (error < 0)
 			goto out;
 
@@ -1129,7 +1049,7 @@ xlog_verify_tail(
 		"Tail block (0x%llx) overwrite detected. Updated to 0x%llx",
 			 orig_tail, *tail_blk);
 out:
-	xlog_put_bp(bp);
+	kmem_free(buffer);
 	return error;
 }
 
@@ -1151,13 +1071,13 @@ xlog_verify_head(
 	struct xlog		*log,
 	xfs_daddr_t		*head_blk,	/* in/out: unverified head */
 	xfs_daddr_t		*tail_blk,	/* out: tail block */
-	struct xfs_buf		*bp,
+	char			*buffer,
 	xfs_daddr_t		*rhead_blk,	/* start blk of last record */
 	struct xlog_rec_header	**rhead,	/* ptr to last record */
 	bool			*wrapped)	/* last rec. wraps phys. log */
 {
 	struct xlog_rec_header	*tmp_rhead;
-	struct xfs_buf		*tmp_bp;
+	char			*tmp_buffer;
 	xfs_daddr_t		first_bad;
 	xfs_daddr_t		tmp_rhead_blk;
 	int			found;
@@ -1168,15 +1088,15 @@ xlog_verify_head(
 	 * Check the head of the log for torn writes. Search backwards from the
 	 * head until we hit the tail or the maximum number of log record I/Os
 	 * that could have been in flight at one time. Use a temporary buffer so
-	 * we don't trash the rhead/bp pointers from the caller.
+	 * we don't trash the rhead/buffer pointers from the caller.
 	 */
-	tmp_bp = xlog_get_bp(log, 1);
-	if (!tmp_bp)
+	tmp_buffer = xlog_alloc_buffer(log, 1);
+	if (!tmp_buffer)
 		return -ENOMEM;
 	error = xlog_rseek_logrec_hdr(log, *head_blk, *tail_blk,
-				      XLOG_MAX_ICLOGS, tmp_bp, &tmp_rhead_blk,
-				      &tmp_rhead, &tmp_wrapped);
-	xlog_put_bp(tmp_bp);
+				      XLOG_MAX_ICLOGS, tmp_buffer,
+				      &tmp_rhead_blk, &tmp_rhead, &tmp_wrapped);
+	kmem_free(tmp_buffer);
 	if (error < 0)
 		return error;
 
@@ -1205,8 +1125,8 @@ xlog_verify_head(
 		 * (i.e., the records with invalid CRC) if the cycle number
 		 * matches the the current cycle.
 		 */
-		found = xlog_rseek_logrec_hdr(log, first_bad, *tail_blk, 1, bp,
-					      rhead_blk, rhead, wrapped);
+		found = xlog_rseek_logrec_hdr(log, first_bad, *tail_blk, 1,
+				buffer, rhead_blk, rhead, wrapped);
 		if (found < 0)
 			return found;
 		if (found == 0)		/* XXX: right thing to do here? */
@@ -1266,7 +1186,7 @@ xlog_check_unmount_rec(
 	xfs_daddr_t		*tail_blk,
 	struct xlog_rec_header	*rhead,
 	xfs_daddr_t		rhead_blk,
-	struct xfs_buf		*bp,
+	char			*buffer,
 	bool			*clean)
 {
 	struct xlog_op_header	*op_head;
@@ -1309,7 +1229,7 @@ xlog_check_unmount_rec(
 	if (*head_blk == after_umount_blk &&
 	    be32_to_cpu(rhead->h_num_logops) == 1) {
 		umount_data_blk = xlog_wrap_logbno(log, rhead_blk + hblks);
-		error = xlog_bread(log, umount_data_blk, 1, bp, &offset);
+		error = xlog_bread(log, umount_data_blk, 1, buffer, &offset);
 		if (error)
 			return error;
 
@@ -1388,7 +1308,7 @@ xlog_find_tail(
 {
 	xlog_rec_header_t	*rhead;
 	char			*offset = NULL;
-	xfs_buf_t		*bp;
+	char			*buffer;
 	int			error;
 	xfs_daddr_t		rhead_blk;
 	xfs_lsn_t		tail_lsn;
@@ -1402,11 +1322,11 @@ xlog_find_tail(
 		return error;
 	ASSERT(*head_blk < INT_MAX);
 
-	bp = xlog_get_bp(log, 1);
-	if (!bp)
+	buffer = xlog_alloc_buffer(log, 1);
+	if (!buffer)
 		return -ENOMEM;
 	if (*head_blk == 0) {				/* special case */
-		error = xlog_bread(log, 0, 1, bp, &offset);
+		error = xlog_bread(log, 0, 1, buffer, &offset);
 		if (error)
 			goto done;
 
@@ -1422,7 +1342,7 @@ xlog_find_tail(
 	 * block. This wraps all the way back around to the head so something is
 	 * seriously wrong if we can't find it.
 	 */
-	error = xlog_rseek_logrec_hdr(log, *head_blk, *head_blk, 1, bp,
+	error = xlog_rseek_logrec_hdr(log, *head_blk, *head_blk, 1, buffer,
 				      &rhead_blk, &rhead, &wrapped);
 	if (error < 0)
 		return error;
@@ -1443,7 +1363,7 @@ xlog_find_tail(
 	 * state to determine whether recovery is necessary.
 	 */
 	error = xlog_check_unmount_rec(log, head_blk, tail_blk, rhead,
-				       rhead_blk, bp, &clean);
+				       rhead_blk, buffer, &clean);
 	if (error)
 		goto done;
 
@@ -1460,7 +1380,7 @@ xlog_find_tail(
 	if (!clean) {
 		xfs_daddr_t	orig_head = *head_blk;
 
-		error = xlog_verify_head(log, head_blk, tail_blk, bp,
+		error = xlog_verify_head(log, head_blk, tail_blk, buffer,
 					 &rhead_blk, &rhead, &wrapped);
 		if (error)
 			goto done;
@@ -1471,7 +1391,7 @@ xlog_find_tail(
 				       wrapped);
 			tail_lsn = atomic64_read(&log->l_tail_lsn);
 			error = xlog_check_unmount_rec(log, head_blk, tail_blk,
-						       rhead, rhead_blk, bp,
+						       rhead, rhead_blk, buffer,
 						       &clean);
 			if (error)
 				goto done;
@@ -1505,11 +1425,11 @@ xlog_find_tail(
 	 * But... if the -device- itself is readonly, just skip this.
 	 * We can't recover this device anyway, so it won't matter.
 	 */
-	if (!xfs_readonly_buftarg(log->l_mp->m_logdev_targp))
+	if (!xfs_readonly_buftarg(log->l_targ))
 		error = xlog_clear_stale_blocks(log, tail_lsn);
 
 done:
-	xlog_put_bp(bp);
+	kmem_free(buffer);
 
 	if (error)
 		xfs_warn(log->l_mp, "failed to locate log tail");
@@ -1537,7 +1457,7 @@ xlog_find_zeroed(
 	struct xlog	*log,
 	xfs_daddr_t	*blk_no)
 {
-	xfs_buf_t	*bp;
+	char		*buffer;
 	char		*offset;
 	uint	        first_cycle, last_cycle;
 	xfs_daddr_t	new_blk, last_blk, start_blk;
@@ -1547,35 +1467,36 @@ xlog_find_zeroed(
 	*blk_no = 0;
 
 	/* check totally zeroed log */
-	bp = xlog_get_bp(log, 1);
-	if (!bp)
+	buffer = xlog_alloc_buffer(log, 1);
+	if (!buffer)
 		return -ENOMEM;
-	error = xlog_bread(log, 0, 1, bp, &offset);
+	error = xlog_bread(log, 0, 1, buffer, &offset);
 	if (error)
-		goto bp_err;
+		goto out_free_buffer;
 
 	first_cycle = xlog_get_cycle(offset);
 	if (first_cycle == 0) {		/* completely zeroed log */
 		*blk_no = 0;
-		xlog_put_bp(bp);
+		kmem_free(buffer);
 		return 1;
 	}
 
 	/* check partially zeroed log */
-	error = xlog_bread(log, log_bbnum-1, 1, bp, &offset);
+	error = xlog_bread(log, log_bbnum-1, 1, buffer, &offset);
 	if (error)
-		goto bp_err;
+		goto out_free_buffer;
 
 	last_cycle = xlog_get_cycle(offset);
 	if (last_cycle != 0) {		/* log completely written to */
-		xlog_put_bp(bp);
+		kmem_free(buffer);
 		return 0;
 	}
 
 	/* we have a partially zeroed log */
 	last_blk = log_bbnum-1;
-	if ((error = xlog_find_cycle_start(log, bp, 0, &last_blk, 0)))
-		goto bp_err;
+	error = xlog_find_cycle_start(log, buffer, 0, &last_blk, 0);
+	if (error)
+		goto out_free_buffer;
 
 	/*
 	 * Validate the answer.  Because there is no way to guarantee that
@@ -1598,7 +1519,7 @@ xlog_find_zeroed(
 	 */
 	if ((error = xlog_find_verify_cycle(log, start_blk,
 					 (int)num_scan_bblks, 0, &new_blk)))
-		goto bp_err;
+		goto out_free_buffer;
 	if (new_blk != -1)
 		last_blk = new_blk;
 
@@ -1610,11 +1531,11 @@ xlog_find_zeroed(
 	if (error == 1)
 		error = -EIO;
 	if (error)
-		goto bp_err;
+		goto out_free_buffer;
 
 	*blk_no = last_blk;
-bp_err:
-	xlog_put_bp(bp);
+out_free_buffer:
+	kmem_free(buffer);
 	if (error)
 		return error;
 	return 1;
@@ -1657,7 +1578,7 @@ xlog_write_log_records(
 	int		tail_block)
 {
 	char		*offset;
-	xfs_buf_t	*bp;
+	char		*buffer;
 	int		balign, ealign;
 	int		sectbb = log->l_sectBBsize;
 	int		end_block = start_block + blocks;
@@ -1674,7 +1595,7 @@ xlog_write_log_records(
 	bufblks = 1 << ffs(blocks);
 	while (bufblks > log->l_logBBsize)
 		bufblks >>= 1;
-	while (!(bp = xlog_get_bp(log, bufblks))) {
+	while (!(buffer = xlog_alloc_buffer(log, bufblks))) {
 		bufblks >>= 1;
 		if (bufblks < sectbb)
 			return -ENOMEM;
@@ -1686,9 +1607,9 @@ xlog_write_log_records(
 	 */
 	balign = round_down(start_block, sectbb);
 	if (balign != start_block) {
-		error = xlog_bread_noalign(log, start_block, 1, bp);
+		error = xlog_bread_noalign(log, start_block, 1, buffer);
 		if (error)
-			goto out_put_bp;
+			goto out_free_buffer;
 
 		j = start_block - balign;
 	}
@@ -1705,29 +1626,28 @@ xlog_write_log_records(
 		 */
 		ealign = round_down(end_block, sectbb);
 		if (j == 0 && (start_block + endcount > ealign)) {
-			offset = bp->b_addr + BBTOB(ealign - start_block);
-			error = xlog_bread_offset(log, ealign, sectbb,
-							bp, offset);
+			error = xlog_bread_noalign(log, ealign, sectbb,
+					buffer + BBTOB(ealign - start_block));
 			if (error)
 				break;
 
 		}
 
-		offset = xlog_align(log, start_block, endcount, bp);
+		offset = buffer + xlog_align(log, start_block);
 		for (; j < endcount; j++) {
 			xlog_add_record(log, offset, cycle, i+j,
 					tail_cycle, tail_block);
 			offset += BBSIZE;
 		}
-		error = xlog_bwrite(log, start_block, endcount, bp);
+		error = xlog_bwrite(log, start_block, endcount, buffer);
 		if (error)
 			break;
 		start_block += endcount;
 		j = 0;
 	}
 
- out_put_bp:
-	xlog_put_bp(bp);
+out_free_buffer:
+	kmem_free(buffer);
 	return error;
 }
 
@@ -2162,7 +2082,7 @@ xlog_recover_do_inode_buffer(
 	if (xfs_sb_version_hascrc(&mp->m_sb))
 		bp->b_ops = &xfs_inode_buf_ops;
 
-	inodes_per_buf = BBTOB(bp->b_io_length) >> mp->m_sb.sb_inodelog;
+	inodes_per_buf = BBTOB(bp->b_length) >> mp->m_sb.sb_inodelog;
 	for (i = 0; i < inodes_per_buf; i++) {
 		next_unlinked_offset = (i * mp->m_sb.sb_inodesize) +
 			offsetof(xfs_dinode_t, di_next_unlinked);
@@ -2204,8 +2124,7 @@ xlog_recover_do_inode_buffer(
 
 		ASSERT(item->ri_buf[item_index].i_addr != NULL);
 		ASSERT((item->ri_buf[item_index].i_len % XFS_BLF_CHUNK) == 0);
-		ASSERT((reg_buf_offset + reg_buf_bytes) <=
-							BBTOB(bp->b_io_length));
+		ASSERT((reg_buf_offset + reg_buf_bytes) <= BBTOB(bp->b_length));
 
 		/*
 		 * The current logged region contains a copy of the
@@ -2439,17 +2358,21 @@ xlog_recover_validate_buf_type(
 	case XFS_BLFT_BTREE_BUF:
 		switch (magic32) {
 		case XFS_ABTB_CRC_MAGIC:
-		case XFS_ABTC_CRC_MAGIC:
 		case XFS_ABTB_MAGIC:
+			bp->b_ops = &xfs_bnobt_buf_ops;
+			break;
+		case XFS_ABTC_CRC_MAGIC:
 		case XFS_ABTC_MAGIC:
-			bp->b_ops = &xfs_allocbt_buf_ops;
+			bp->b_ops = &xfs_cntbt_buf_ops;
 			break;
 		case XFS_IBT_CRC_MAGIC:
-		case XFS_FIBT_CRC_MAGIC:
 		case XFS_IBT_MAGIC:
-		case XFS_FIBT_MAGIC:
 			bp->b_ops = &xfs_inobt_buf_ops;
 			break;
+		case XFS_FIBT_CRC_MAGIC:
+		case XFS_FIBT_MAGIC:
+			bp->b_ops = &xfs_finobt_buf_ops;
+			break;
 		case XFS_BMAP_CRC_MAGIC:
 		case XFS_BMAP_MAGIC:
 			bp->b_ops = &xfs_bmbt_buf_ops;
@@ -2666,7 +2589,7 @@ xlog_recover_do_reg_buffer(
 		ASSERT(nbits > 0);
 		ASSERT(item->ri_buf[i].i_addr != NULL);
 		ASSERT(item->ri_buf[i].i_len % XFS_BLF_CHUNK == 0);
-		ASSERT(BBTOB(bp->b_io_length) >=
+		ASSERT(BBTOB(bp->b_length) >=
 		       ((uint)bit << XFS_BLF_SHIFT) + (nbits << XFS_BLF_SHIFT));
 
 		/*
@@ -2878,23 +2801,22 @@ xlog_recover_buffer_pass2(
 	 *
 	 * Also make sure that only inode buffers with good sizes stay in
 	 * the buffer cache.  The kernel moves inodes in buffers of 1 block
-	 * or mp->m_inode_cluster_size bytes, whichever is bigger.  The inode
+	 * or inode_cluster_size bytes, whichever is bigger.  The inode
 	 * buffers in the log can be a different size if the log was generated
 	 * by an older kernel using unclustered inode buffers or a newer kernel
 	 * running with a different inode cluster size.  Regardless, if the
-	 * the inode buffer size isn't max(blocksize, mp->m_inode_cluster_size)
-	 * for *our* value of mp->m_inode_cluster_size, then we need to keep
+	 * the inode buffer size isn't max(blocksize, inode_cluster_size)
+	 * for *our* value of inode_cluster_size, then we need to keep
 	 * the buffer out of the buffer cache so that the buffer won't
 	 * overlap with future reads of those inodes.
 	 */
 	if (XFS_DINODE_MAGIC ==
 	    be16_to_cpu(*((__be16 *)xfs_buf_offset(bp, 0))) &&
-	    (BBTOB(bp->b_io_length) != max(log->l_mp->m_sb.sb_blocksize,
-			(uint32_t)log->l_mp->m_inode_cluster_size))) {
+	    (BBTOB(bp->b_length) != M_IGEO(log->l_mp)->inode_cluster_size)) {
 		xfs_buf_stale(bp);
 		error = xfs_bwrite(bp);
 	} else {
-		ASSERT(bp->b_target->bt_mount == mp);
+		ASSERT(bp->b_mount == mp);
 		bp->b_iodone = xlog_recover_iodone;
 		xfs_buf_delwri_queue(bp, buffer_list);
 	}
@@ -3045,7 +2967,7 @@ xlog_recover_inode_pass2(
 	 * Make sure the place we're flushing out to really looks
 	 * like an inode!
 	 */
-	if (unlikely(dip->di_magic != cpu_to_be16(XFS_DINODE_MAGIC))) {
+	if (unlikely(!xfs_verify_magic16(bp, dip->di_magic))) {
 		xfs_alert(mp,
 	"%s: Bad inode magic number, dip = "PTR_FMT", dino bp = "PTR_FMT", ino = %Ld",
 			__func__, dip, bp, in_f->ilf_ino);
@@ -3256,7 +3178,7 @@ out_owner_change:
 	/* re-generate the checksum. */
 	xfs_dinode_calc_crc(log->l_mp, dip);
 
-	ASSERT(bp->b_target->bt_mount == mp);
+	ASSERT(bp->b_mount == mp);
 	bp->b_iodone = xlog_recover_iodone;
 	xfs_buf_delwri_queue(bp, buffer_list);
 
@@ -3395,7 +3317,7 @@ xlog_recover_dquot_pass2(
 	}
 
 	ASSERT(dq_f->qlf_size == 2);
-	ASSERT(bp->b_target->bt_mount == mp);
+	ASSERT(bp->b_mount == mp);
 	bp->b_iodone = xlog_recover_iodone;
 	xfs_buf_delwri_queue(bp, buffer_list);
 
@@ -3459,7 +3381,7 @@ xlog_recover_efd_pass2(
 {
 	xfs_efd_log_format_t	*efd_formatp;
 	xfs_efi_log_item_t	*efip = NULL;
-	xfs_log_item_t		*lip;
+	struct xfs_log_item	*lip;
 	uint64_t		efi_id;
 	struct xfs_ail_cursor	cur;
 	struct xfs_ail		*ailp = log->l_ailp;
@@ -3845,6 +3767,7 @@ xlog_recover_do_icreate_pass2(
 {
 	struct xfs_mount	*mp = log->l_mp;
 	struct xfs_icreate_log	*icl;
+	struct xfs_ino_geometry	*igeo = M_IGEO(mp);
 	xfs_agnumber_t		agno;
 	xfs_agblock_t		agbno;
 	unsigned int		count;
@@ -3894,10 +3817,10 @@ xlog_recover_do_icreate_pass2(
 
 	/*
 	 * The inode chunk is either full or sparse and we only support
-	 * m_ialloc_min_blks sized sparse allocations at this time.
+	 * m_ino_geo.ialloc_min_blks sized sparse allocations at this time.
 	 */
-	if (length != mp->m_ialloc_blks &&
-	    length != mp->m_ialloc_min_blks) {
+	if (length != igeo->ialloc_blks &&
+	    length != igeo->ialloc_min_blks) {
 		xfs_warn(log->l_mp,
 			 "%s: unsupported chunk length", __FUNCTION__);
 		return -EINVAL;
@@ -3917,13 +3840,13 @@ xlog_recover_do_icreate_pass2(
 	 * buffers for cancellation so we don't overwrite anything written after
 	 * a cancellation.
 	 */
-	bb_per_cluster = XFS_FSB_TO_BB(mp, mp->m_blocks_per_cluster);
-	nbufs = length / mp->m_blocks_per_cluster;
+	bb_per_cluster = XFS_FSB_TO_BB(mp, igeo->blocks_per_cluster);
+	nbufs = length / igeo->blocks_per_cluster;
 	for (i = 0, cancel_count = 0; i < nbufs; i++) {
 		xfs_daddr_t	daddr;
 
 		daddr = XFS_AGB_TO_DADDR(mp, agno,
-					 agbno + i * mp->m_blocks_per_cluster);
+				agbno + i * igeo->blocks_per_cluster);
 		if (xlog_check_buffer_cancelled(log, daddr, bb_per_cluster, 0))
 			cancel_count++;
 	}
@@ -4952,12 +4875,11 @@ out:
  * A cancel occurs when the mount has failed and we're bailing out.
  * Release all pending log intent items so they don't pin the AIL.
  */
-STATIC int
+STATIC void
 xlog_recover_cancel_intents(
 	struct xlog		*log)
 {
 	struct xfs_log_item	*lip;
-	int			error = 0;
 	struct xfs_ail_cursor	cur;
 	struct xfs_ail		*ailp;
 
@@ -4997,7 +4919,6 @@ xlog_recover_cancel_intents(
 
 	xfs_trans_ail_cursor_done(&cur);
 	spin_unlock(&ailp->ail_lock);
-	return error;
 }
 
 /*
@@ -5163,7 +5084,7 @@ xlog_recover_process_iunlinks(
 	}
 }
 
-STATIC int
+STATIC void
 xlog_unpack_data(
 	struct xlog_rec_header	*rhead,
 	char			*dp,
@@ -5186,8 +5107,6 @@ xlog_unpack_data(
 			dp += BBSIZE;
 		}
 	}
-
-	return 0;
 }
 
 /*
@@ -5202,11 +5121,9 @@ xlog_recover_process(
 	int			pass,
 	struct list_head	*buffer_list)
 {
-	int			error;
 	__le32			old_crc = rhead->h_crc;
 	__le32			crc;
 
-
 	crc = xlog_cksum(log, rhead, dp, be32_to_cpu(rhead->h_len));
 
 	/*
@@ -5245,9 +5162,7 @@ xlog_recover_process(
 			return -EFSCORRUPTED;
 	}
 
-	error = xlog_unpack_data(rhead, dp, log);
-	if (error)
-		return error;
+	xlog_unpack_data(rhead, dp, log);
 
 	return xlog_recover_process_data(log, rhash, rhead, dp, pass,
 					 buffer_list);
@@ -5309,7 +5224,7 @@ xlog_do_recovery_pass(
 	xfs_daddr_t		blk_no, rblk_no;
 	xfs_daddr_t		rhead_blk;
 	char			*offset;
-	xfs_buf_t		*hbp, *dbp;
+	char			*hbp, *dbp;
 	int			error = 0, h_size, h_len;
 	int			error2 = 0;
 	int			bblks, split_bblks;
@@ -5334,7 +5249,7 @@ xlog_do_recovery_pass(
 		 * iclog header and extract the header size from it.  Get a
 		 * new hbp that is the correct size.
 		 */
-		hbp = xlog_get_bp(log, 1);
+		hbp = xlog_alloc_buffer(log, 1);
 		if (!hbp)
 			return -ENOMEM;
 
@@ -5376,23 +5291,23 @@ xlog_do_recovery_pass(
 			hblks = h_size / XLOG_HEADER_CYCLE_SIZE;
 			if (h_size % XLOG_HEADER_CYCLE_SIZE)
 				hblks++;
-			xlog_put_bp(hbp);
-			hbp = xlog_get_bp(log, hblks);
+			kmem_free(hbp);
+			hbp = xlog_alloc_buffer(log, hblks);
 		} else {
 			hblks = 1;
 		}
 	} else {
 		ASSERT(log->l_sectBBsize == 1);
 		hblks = 1;
-		hbp = xlog_get_bp(log, 1);
+		hbp = xlog_alloc_buffer(log, 1);
 		h_size = XLOG_BIG_RECORD_BSIZE;
 	}
 
 	if (!hbp)
 		return -ENOMEM;
-	dbp = xlog_get_bp(log, BTOBB(h_size));
+	dbp = xlog_alloc_buffer(log, BTOBB(h_size));
 	if (!dbp) {
-		xlog_put_bp(hbp);
+		kmem_free(hbp);
 		return -ENOMEM;
 	}
 
@@ -5407,7 +5322,7 @@ xlog_do_recovery_pass(
 			/*
 			 * Check for header wrapping around physical end-of-log
 			 */
-			offset = hbp->b_addr;
+			offset = hbp;
 			split_hblks = 0;
 			wrapped_hblks = 0;
 			if (blk_no + hblks <= log->l_logBBsize) {
@@ -5443,8 +5358,8 @@ xlog_do_recovery_pass(
 				 *   - order is important.
 				 */
 				wrapped_hblks = hblks - split_hblks;
-				error = xlog_bread_offset(log, 0,
-						wrapped_hblks, hbp,
+				error = xlog_bread_noalign(log, 0,
+						wrapped_hblks,
 						offset + BBTOB(split_hblks));
 				if (error)
 					goto bread_err2;
@@ -5475,7 +5390,7 @@ xlog_do_recovery_pass(
 			} else {
 				/* This log record is split across the
 				 * physical end of log */
-				offset = dbp->b_addr;
+				offset = dbp;
 				split_bblks = 0;
 				if (blk_no != log->l_logBBsize) {
 					/* some data is before the physical
@@ -5504,8 +5419,8 @@ xlog_do_recovery_pass(
 				 *   _first_, then the log start (LR header end)
 				 *   - order is important.
 				 */
-				error = xlog_bread_offset(log, 0,
-						bblks - split_bblks, dbp,
+				error = xlog_bread_noalign(log, 0,
+						bblks - split_bblks,
 						offset + BBTOB(split_bblks));
 				if (error)
 					goto bread_err2;
@@ -5553,9 +5468,9 @@ xlog_do_recovery_pass(
 	}
 
  bread_err2:
-	xlog_put_bp(dbp);
+	kmem_free(dbp);
  bread_err1:
-	xlog_put_bp(hbp);
+	kmem_free(hbp);
 
 	/*
 	 * Submit buffers that have been added from the last record processed,
@@ -5689,7 +5604,7 @@ xlog_do_recover(
 	 * Now that we've finished replaying all buffer and inode
 	 * updates, re-read in the superblock and reverify it.
 	 */
-	bp = xfs_getsb(mp, 0);
+	bp = xfs_getsb(mp);
 	bp->b_flags &= ~(XBF_DONE | XBF_ASYNC);
 	ASSERT(!(bp->b_flags & XBF_WRITE));
 	bp->b_flags |= XBF_READ;
@@ -5862,16 +5777,12 @@ xlog_recover_finish(
 	return 0;
 }
 
-int
+void
 xlog_recover_cancel(
 	struct xlog	*log)
 {
-	int		error = 0;
-
 	if (log->l_flags & XLOG_RECOVERY_NEEDED)
-		error = xlog_recover_cancel_intents(log);
-
-	return error;
+		xlog_recover_cancel_intents(log);
 }
 
 #if defined(DEBUG)
diff --git a/fs/xfs/xfs_message.c b/fs/xfs/xfs_message.c
index 6b736ea58d35..9804efe525a9 100644
--- a/fs/xfs/xfs_message.c
+++ b/fs/xfs/xfs_message.c
@@ -6,8 +6,8 @@
 #include "xfs.h"
 #include "xfs_fs.h"
 #include "xfs_error.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
-#include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
 
diff --git a/fs/xfs/xfs_mount.c b/fs/xfs/xfs_mount.c
index b4d8c318be3c..322da6909290 100644
--- a/fs/xfs/xfs_mount.c
+++ b/fs/xfs/xfs_mount.c
@@ -12,9 +12,6 @@
 #include "xfs_bit.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_dir2.h"
 #include "xfs_ialloc.h"
@@ -27,13 +24,13 @@
 #include "xfs_error.h"
 #include "xfs_quota.h"
 #include "xfs_fsops.h"
-#include "xfs_trace.h"
 #include "xfs_icache.h"
 #include "xfs_sysfs.h"
 #include "xfs_rmap_btree.h"
 #include "xfs_refcount_btree.h"
 #include "xfs_reflink.h"
 #include "xfs_extent_busy.h"
+#include "xfs_health.h"
 
 
 static DEFINE_MUTEX(xfs_uuid_table_mutex);
@@ -149,6 +146,7 @@ xfs_free_perag(
 		spin_unlock(&mp->m_perag_lock);
 		ASSERT(pag);
 		ASSERT(atomic_read(&pag->pag_ref) == 0);
+		xfs_iunlink_destroy(pag);
 		xfs_buf_hash_destroy(pag);
 		mutex_destroy(&pag->pag_ici_reclaim_lock);
 		call_rcu(&pag->rcu_head, __xfs_free_perag);
@@ -227,6 +225,10 @@ xfs_initialize_perag(
 		/* first new pag is fully initialized */
 		if (first_initialised == NULLAGNUMBER)
 			first_initialised = index;
+		error = xfs_iunlink_init(pag);
+		if (error)
+			goto out_hash_destroy;
+		spin_lock_init(&pag->pag_state_lock);
 	}
 
 	index = xfs_set_inode_alloc(mp, agcount);
@@ -249,6 +251,7 @@ out_unwind_new_pags:
 		if (!pag)
 			break;
 		xfs_buf_hash_destroy(pag);
+		xfs_iunlink_destroy(pag);
 		mutex_destroy(&pag->pag_ici_reclaim_lock);
 		kmem_free(pag);
 	}
@@ -423,30 +426,6 @@ xfs_update_alignment(xfs_mount_t *mp)
 }
 
 /*
- * Set the maximum inode count for this filesystem
- */
-STATIC void
-xfs_set_maxicount(xfs_mount_t *mp)
-{
-	xfs_sb_t	*sbp = &(mp->m_sb);
-	uint64_t	icount;
-
-	if (sbp->sb_imax_pct) {
-		/*
-		 * Make sure the maximum inode count is a multiple
-		 * of the units we allocate inodes in.
-		 */
-		icount = sbp->sb_dblocks * sbp->sb_imax_pct;
-		do_div(icount, 100);
-		do_div(icount, mp->m_ialloc_blks);
-		mp->m_maxicount = (icount * mp->m_ialloc_blks)  <<
-				   sbp->sb_inopblog;
-	} else {
-		mp->m_maxicount = 0;
-	}
-}
-
-/*
  * Set the default minimum read and write sizes unless
  * already specified in a mount option.
  * We use smaller I/O sizes when the file system
@@ -502,29 +481,6 @@ xfs_set_low_space_thresholds(
 	}
 }
 
-
-/*
- * Set whether we're using inode alignment.
- */
-STATIC void
-xfs_set_inoalignment(xfs_mount_t *mp)
-{
-	if (xfs_sb_version_hasalign(&mp->m_sb) &&
-		mp->m_sb.sb_inoalignmt >= xfs_icluster_size_fsb(mp))
-		mp->m_inoalign_mask = mp->m_sb.sb_inoalignmt - 1;
-	else
-		mp->m_inoalign_mask = 0;
-	/*
-	 * If we are using stripe alignment, check whether
-	 * the stripe unit is a multiple of the inode alignment
-	 */
-	if (mp->m_dalign && mp->m_inoalign_mask &&
-	    !(mp->m_dalign & mp->m_inoalign_mask))
-		mp->m_sinoalign = mp->m_dalign;
-	else
-		mp->m_sinoalign = 0;
-}
-
 /*
  * Check that the data (and log if separate) is an ok size.
  */
@@ -639,7 +595,7 @@ xfs_check_summary_counts(
 	    (mp->m_sb.sb_fdblocks > mp->m_sb.sb_dblocks ||
 	     !xfs_verify_icount(mp, mp->m_sb.sb_icount) ||
 	     mp->m_sb.sb_ifree > mp->m_sb.sb_icount))
-		mp->m_flags |= XFS_MOUNT_BAD_SUMMARY;
+		xfs_fs_mark_sick(mp, XFS_SICK_FS_COUNTERS);
 
 	/*
 	 * We can safely re-initialise incore superblock counters from the
@@ -654,7 +610,7 @@ xfs_check_summary_counts(
 	 */
 	if ((!xfs_sb_version_haslazysbcount(&mp->m_sb) ||
 	     XFS_LAST_UNMOUNT_WAS_CLEAN(mp)) &&
-	    !(mp->m_flags & XFS_MOUNT_BAD_SUMMARY))
+	    !xfs_fs_has_sickness(mp, XFS_SICK_FS_COUNTERS))
 		return 0;
 
 	return xfs_initialize_perag_data(mp, mp->m_sb.sb_agcount);
@@ -676,6 +632,7 @@ xfs_mountfs(
 {
 	struct xfs_sb		*sbp = &(mp->m_sb);
 	struct xfs_inode	*rip;
+	struct xfs_ino_geometry	*igeo = M_IGEO(mp);
 	uint64_t		resblks;
 	uint			quotamount = 0;
 	uint			quotaflags = 0;
@@ -742,12 +699,10 @@ xfs_mountfs(
 	xfs_alloc_compute_maxlevels(mp);
 	xfs_bmap_compute_maxlevels(mp, XFS_DATA_FORK);
 	xfs_bmap_compute_maxlevels(mp, XFS_ATTR_FORK);
-	xfs_ialloc_compute_maxlevels(mp);
+	xfs_ialloc_setup_geometry(mp);
 	xfs_rmapbt_compute_maxlevels(mp);
 	xfs_refcountbt_compute_maxlevels(mp);
 
-	xfs_set_maxicount(mp);
-
 	/* enable fail_at_unmount as default */
 	mp->m_fail_unmount = true;
 
@@ -781,50 +736,22 @@ xfs_mountfs(
 	xfs_set_low_space_thresholds(mp);
 
 	/*
-	 * Set the inode cluster size.
-	 * This may still be overridden by the file system
-	 * block size if it is larger than the chosen cluster size.
-	 *
-	 * For v5 filesystems, scale the cluster size with the inode size to
-	 * keep a constant ratio of inode per cluster buffer, but only if mkfs
-	 * has set the inode alignment value appropriately for larger cluster
-	 * sizes.
-	 */
-	mp->m_inode_cluster_size = XFS_INODE_BIG_CLUSTER_SIZE;
-	if (xfs_sb_version_hascrc(&mp->m_sb)) {
-		int	new_size = mp->m_inode_cluster_size;
-
-		new_size *= mp->m_sb.sb_inodesize / XFS_DINODE_MIN_SIZE;
-		if (mp->m_sb.sb_inoalignmt >= XFS_B_TO_FSBT(mp, new_size))
-			mp->m_inode_cluster_size = new_size;
-	}
-	mp->m_blocks_per_cluster = xfs_icluster_size_fsb(mp);
-	mp->m_inodes_per_cluster = XFS_FSB_TO_INO(mp, mp->m_blocks_per_cluster);
-	mp->m_cluster_align = xfs_ialloc_cluster_alignment(mp);
-	mp->m_cluster_align_inodes = XFS_FSB_TO_INO(mp, mp->m_cluster_align);
-
-	/*
 	 * If enabled, sparse inode chunk alignment is expected to match the
 	 * cluster size. Full inode chunk alignment must match the chunk size,
 	 * but that is checked on sb read verification...
 	 */
 	if (xfs_sb_version_hassparseinodes(&mp->m_sb) &&
 	    mp->m_sb.sb_spino_align !=
-			XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size)) {
+			XFS_B_TO_FSBT(mp, igeo->inode_cluster_size_raw)) {
 		xfs_warn(mp,
 	"Sparse inode block alignment (%u) must match cluster size (%llu).",
 			 mp->m_sb.sb_spino_align,
-			 XFS_B_TO_FSBT(mp, mp->m_inode_cluster_size));
+			 XFS_B_TO_FSBT(mp, igeo->inode_cluster_size_raw));
 		error = -EINVAL;
 		goto out_remove_uuid;
 	}
 
 	/*
-	 * Set inode alignment fields
-	 */
-	xfs_set_inoalignment(mp);
-
-	/*
 	 * Check that the data (and log if separate) is an ok size.
 	 */
 	error = xfs_check_sizes(mp);
@@ -1063,6 +990,7 @@ xfs_mountfs(
 	 */
 	cancel_delayed_work_sync(&mp->m_reclaim_work);
 	xfs_reclaim_inodes(mp, SYNC_WAIT);
+	xfs_health_unmount(mp);
  out_log_dealloc:
 	mp->m_flags |= XFS_MOUNT_UNMOUNTING;
 	xfs_log_mount_cancel(mp);
@@ -1099,7 +1027,7 @@ xfs_unmountfs(
 	uint64_t		resblks;
 	int			error;
 
-	xfs_icache_disable_reclaim(mp);
+	xfs_stop_block_reaping(mp);
 	xfs_fs_unreserve_ag_blocks(mp);
 	xfs_qm_unmount_quotas(mp);
 	xfs_rtunmount_inodes(mp);
@@ -1145,6 +1073,7 @@ xfs_unmountfs(
 	 */
 	cancel_delayed_work_sync(&mp->m_reclaim_work);
 	xfs_reclaim_inodes(mp, SYNC_WAIT);
+	xfs_health_unmount(mp);
 
 	xfs_qm_unmount(mp);
 
@@ -1376,24 +1305,14 @@ xfs_mod_frextents(
  * xfs_getsb() is called to obtain the buffer for the superblock.
  * The buffer is returned locked and read in from disk.
  * The buffer should be released with a call to xfs_brelse().
- *
- * If the flags parameter is BUF_TRYLOCK, then we'll only return
- * the superblock buffer if it can be locked without sleeping.
- * If it can't then we'll return NULL.
  */
 struct xfs_buf *
 xfs_getsb(
-	struct xfs_mount	*mp,
-	int			flags)
+	struct xfs_mount	*mp)
 {
 	struct xfs_buf		*bp = mp->m_sb_bp;
 
-	if (!xfs_buf_trylock(bp)) {
-		if (flags & XBF_TRYLOCK)
-			return NULL;
-		xfs_buf_lock(bp);
-	}
-
+	xfs_buf_lock(bp);
 	xfs_buf_hold(bp);
 	ASSERT(bp->b_flags & XBF_DONE);
 	return bp;
@@ -1440,7 +1359,26 @@ xfs_force_summary_recalc(
 	if (!xfs_sb_version_haslazysbcount(&mp->m_sb))
 		return;
 
-	spin_lock(&mp->m_sb_lock);
-	mp->m_flags |= XFS_MOUNT_BAD_SUMMARY;
-	spin_unlock(&mp->m_sb_lock);
+	xfs_fs_mark_sick(mp, XFS_SICK_FS_COUNTERS);
+}
+
+/*
+ * Update the in-core delayed block counter.
+ *
+ * We prefer to update the counter without having to take a spinlock for every
+ * counter update (i.e. batching).  Each change to delayed allocation
+ * reservations can change can easily exceed the default percpu counter
+ * batching, so we use a larger batch factor here.
+ *
+ * Note that we don't currently have any callers requiring fast summation
+ * (e.g. percpu_counter_read) so we can use a big batch value here.
+ */
+#define XFS_DELALLOC_BATCH	(4096)
+void
+xfs_mod_delalloc(
+	struct xfs_mount	*mp,
+	int64_t			delta)
+{
+	percpu_counter_add_batch(&mp->m_delalloc_blks, delta,
+			XFS_DELALLOC_BATCH);
 }
diff --git a/fs/xfs/xfs_mount.h b/fs/xfs/xfs_mount.h
index 7daafe064af8..4adb6837439a 100644
--- a/fs/xfs/xfs_mount.h
+++ b/fs/xfs/xfs_mount.h
@@ -60,6 +60,20 @@ struct xfs_error_cfg {
 typedef struct xfs_mount {
 	struct super_block	*m_super;
 	xfs_tid_t		m_tid;		/* next unused tid for fs */
+
+	/*
+	 * Bitsets of per-fs metadata that have been checked and/or are sick.
+	 * Callers must hold m_sb_lock to access these two fields.
+	 */
+	uint8_t			m_fs_checked;
+	uint8_t			m_fs_sick;
+	/*
+	 * Bitsets of rt metadata that have been checked and/or are sick.
+	 * Callers must hold m_sb_lock to access this field.
+	 */
+	uint8_t			m_rt_checked;
+	uint8_t			m_rt_sick;
+
 	struct xfs_ail		*m_ail;		/* fs active log item list */
 
 	struct xfs_sb		m_sb;		/* copy of fs superblock */
@@ -67,6 +81,12 @@ typedef struct xfs_mount {
 	struct percpu_counter	m_icount;	/* allocated inodes counter */
 	struct percpu_counter	m_ifree;	/* free inodes counter */
 	struct percpu_counter	m_fdblocks;	/* free block counter */
+	/*
+	 * Count of data device blocks reserved for delayed allocations,
+	 * including indlen blocks.  Does not include allocated CoW staging
+	 * extents or anything related to the rt device.
+	 */
+	struct percpu_counter	m_delalloc_blks;
 
 	struct xfs_buf		*m_sb_bp;	/* buffer for superblock */
 	char			*m_fsname;	/* filesystem name */
@@ -85,6 +105,7 @@ typedef struct xfs_mount {
 	struct xfs_da_geometry	*m_dir_geo;	/* directory block geometry */
 	struct xfs_da_geometry	*m_attr_geo;	/* attribute block geometry */
 	struct xlog		*m_log;		/* log specific stuff */
+	struct xfs_ino_geometry	m_ino_geo;	/* inode geometry */
 	int			m_logbufs;	/* number of log buffers */
 	int			m_logbsize;	/* size of each log buffer */
 	uint			m_rsumlevels;	/* rt summary levels */
@@ -106,12 +127,6 @@ typedef struct xfs_mount {
 	uint8_t			m_blkbit_log;	/* blocklog + NBBY */
 	uint8_t			m_blkbb_log;	/* blocklog - BBSHIFT */
 	uint8_t			m_agno_log;	/* log #ag's */
-	uint8_t			m_agino_log;	/* #bits for agino in inum */
-	uint			m_inode_cluster_size;/* min inode buf size */
-	unsigned int		m_inodes_per_cluster;
-	unsigned int		m_blocks_per_cluster;
-	unsigned int		m_cluster_align;
-	unsigned int		m_cluster_align_inodes;
 	uint			m_blockmask;	/* sb_blocksize-1 */
 	uint			m_blockwsize;	/* sb_blocksize in words */
 	uint			m_blockwmask;	/* blockwsize-1 */
@@ -119,15 +134,12 @@ typedef struct xfs_mount {
 	uint			m_alloc_mnr[2];	/* min alloc btree records */
 	uint			m_bmap_dmxr[2];	/* max bmap btree records */
 	uint			m_bmap_dmnr[2];	/* min bmap btree records */
-	uint			m_inobt_mxr[2];	/* max inobt btree records */
-	uint			m_inobt_mnr[2];	/* min inobt btree records */
 	uint			m_rmap_mxr[2];	/* max rmap btree records */
 	uint			m_rmap_mnr[2];	/* min rmap btree records */
 	uint			m_refc_mxr[2];	/* max refc btree records */
 	uint			m_refc_mnr[2];	/* min refc btree records */
 	uint			m_ag_maxlevels;	/* XFS_AG_MAXLEVELS */
 	uint			m_bm_maxlevels[2]; /* XFS_BM_MAXLEVELS */
-	uint			m_in_maxlevels;	/* max inobt btree levels. */
 	uint			m_rmap_maxlevels; /* max rmap btree levels */
 	uint			m_refc_maxlevels; /* max refcount btree level */
 	xfs_extlen_t		m_ag_prealloc_blocks; /* reserved ag blocks */
@@ -138,21 +150,14 @@ typedef struct xfs_mount {
 	struct mutex		m_growlock;	/* growfs mutex */
 	int			m_fixedfsid[2];	/* unchanged for life of FS */
 	uint64_t		m_flags;	/* global mount flags */
-	bool			m_inotbt_nores; /* no per-AG finobt resv. */
-	int			m_ialloc_inos;	/* inodes in inode allocation */
-	int			m_ialloc_blks;	/* blocks in inode allocation */
-	int			m_ialloc_min_blks;/* min blocks in sparse inode
-						   * allocation */
-	int			m_inoalign_mask;/* mask sb_inoalignmt if used */
+	bool			m_finobt_nores; /* no per-AG finobt resv. */
 	uint			m_qflags;	/* quota status flags */
 	struct xfs_trans_resv	m_resv;		/* precomputed res values */
-	uint64_t		m_maxicount;	/* maximum inode count */
 	uint64_t		m_resblks;	/* total reserved blocks */
 	uint64_t		m_resblks_avail;/* available reserved blocks */
 	uint64_t		m_resblks_save;	/* reserved blks @ remount,ro */
 	int			m_dalign;	/* stripe unit */
 	int			m_swidth;	/* stripe width */
-	int			m_sinoalign;	/* stripe unit inode alignment */
 	uint8_t			m_sectbb_log;	/* sectlog - BBSHIFT */
 	const struct xfs_nameops *m_dirnameops;	/* vector of dir name ops */
 	const struct xfs_dir_ops *m_dir_inode_ops; /* vector of dir inode ops */
@@ -175,11 +180,9 @@ typedef struct xfs_mount {
 	struct xstats		m_stats;	/* per-fs stats */
 
 	struct workqueue_struct *m_buf_workqueue;
-	struct workqueue_struct	*m_data_workqueue;
 	struct workqueue_struct	*m_unwritten_workqueue;
 	struct workqueue_struct	*m_cil_workqueue;
 	struct workqueue_struct	*m_reclaim_workqueue;
-	struct workqueue_struct	*m_log_workqueue;
 	struct workqueue_struct *m_eofblocks_workqueue;
 	struct workqueue_struct	*m_sync_workqueue;
 
@@ -194,6 +197,7 @@ typedef struct xfs_mount {
 	 */
 	uint32_t		m_generation;
 
+	bool			m_always_cow;
 	bool			m_fail_unmount;
 #ifdef DEBUG
 	/*
@@ -206,6 +210,8 @@ typedef struct xfs_mount {
 #endif
 } xfs_mount_t;
 
+#define M_IGEO(mp)		(&(mp)->m_ino_geo)
+
 /*
  * Flags for m_flags.
  */
@@ -213,7 +219,6 @@ typedef struct xfs_mount {
 						   must be synchronous except
 						   for space allocations */
 #define XFS_MOUNT_UNMOUNTING	(1ULL << 1)	/* filesystem is unmounting */
-#define XFS_MOUNT_BAD_SUMMARY	(1ULL << 2)	/* summary counters are bad */
 #define XFS_MOUNT_WAS_CLEAN	(1ULL << 3)
 #define XFS_MOUNT_FS_SHUTDOWN	(1ULL << 4)	/* atomic stop of all filesystem
 						   operations, typically for
@@ -368,6 +373,15 @@ typedef struct xfs_perag {
 	xfs_agino_t	pagl_pagino;
 	xfs_agino_t	pagl_leftrec;
 	xfs_agino_t	pagl_rightrec;
+
+	/*
+	 * Bitsets of per-ag metadata that have been checked and/or are sick.
+	 * Callers should hold pag_state_lock before accessing this field.
+	 */
+	uint16_t	pag_checked;
+	uint16_t	pag_sick;
+	spinlock_t	pag_state_lock;
+
 	spinlock_t	pagb_lock;	/* lock for pagb_tree */
 	struct rb_root	pagb_tree;	/* ordered tree of busy extents */
 	unsigned int	pagb_gen;	/* generation count for pagb_tree */
@@ -396,6 +410,13 @@ typedef struct xfs_perag {
 
 	/* reference count */
 	uint8_t			pagf_refcount_level;
+
+	/*
+	 * Unlinked inode information.  This incore information reflects
+	 * data stored in the AGI, so callers must hold the AGI buffer lock
+	 * or have some other means to control concurrency.
+	 */
+	struct rhashtable	pagi_unlinked_hash;
 } xfs_perag_t;
 
 static inline struct xfs_ag_resv *
@@ -430,7 +451,7 @@ extern int	xfs_mod_fdblocks(struct xfs_mount *mp, int64_t delta,
 				 bool reserved);
 extern int	xfs_mod_frextents(struct xfs_mount *mp, int64_t delta);
 
-extern struct xfs_buf *xfs_getsb(xfs_mount_t *, int);
+extern struct xfs_buf *xfs_getsb(xfs_mount_t *);
 extern int	xfs_readsb(xfs_mount_t *, int);
 extern void	xfs_freesb(xfs_mount_t *);
 extern bool	xfs_fs_writable(struct xfs_mount *mp, int level);
@@ -446,5 +467,6 @@ int	xfs_zero_extent(struct xfs_inode *ip, xfs_fsblock_t start_fsb,
 struct xfs_error_cfg * xfs_error_get_cfg(struct xfs_mount *mp,
 		int error_class, int error);
 void xfs_force_summary_recalc(struct xfs_mount *mp);
+void xfs_mod_delalloc(struct xfs_mount *mp, int64_t delta);
 
 #endif	/* __XFS_MOUNT_H__ */
diff --git a/fs/xfs/xfs_ondisk.h b/fs/xfs/xfs_ondisk.h
index d3e04d20d8d4..b6701b4f59a9 100644
--- a/fs/xfs/xfs_ondisk.h
+++ b/fs/xfs/xfs_ondisk.h
@@ -125,6 +125,32 @@ xfs_check_ondisk_structs(void)
 	XFS_CHECK_STRUCT_SIZE(struct xfs_inode_log_format,	56);
 	XFS_CHECK_STRUCT_SIZE(struct xfs_qoff_logformat,	20);
 	XFS_CHECK_STRUCT_SIZE(struct xfs_trans_header,		16);
+
+	/*
+	 * The v5 superblock format extended several v4 header structures with
+	 * additional data. While new fields are only accessible on v5
+	 * superblocks, it's important that the v5 structures place original v4
+	 * fields/headers in the correct location on-disk. For example, we must
+	 * be able to find magic values at the same location in certain blocks
+	 * regardless of superblock version.
+	 *
+	 * The following checks ensure that various v5 data structures place the
+	 * subset of v4 metadata associated with the same type of block at the
+	 * start of the on-disk block. If there is no data structure definition
+	 * for certain types of v4 blocks, traverse down to the first field of
+	 * common metadata (e.g., magic value) and make sure it is at offset
+	 * zero.
+	 */
+	XFS_CHECK_OFFSET(struct xfs_dir3_leaf, hdr.info.hdr,	0);
+	XFS_CHECK_OFFSET(struct xfs_da3_intnode, hdr.info.hdr,	0);
+	XFS_CHECK_OFFSET(struct xfs_dir3_data_hdr, hdr.magic,	0);
+	XFS_CHECK_OFFSET(struct xfs_dir3_free, hdr.hdr.magic,	0);
+	XFS_CHECK_OFFSET(struct xfs_attr3_leafblock, hdr.info.hdr, 0);
+
+	XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat,		192);
+	XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers,		24);
+	XFS_CHECK_STRUCT_SIZE(struct xfs_bulkstat_req,		64);
+	XFS_CHECK_STRUCT_SIZE(struct xfs_inumbers_req,		64);
 }
 
 #endif /* __XFS_ONDISK_H */
diff --git a/fs/xfs/xfs_pnfs.c b/fs/xfs/xfs_pnfs.c
index f44c3599527d..0c954cad7449 100644
--- a/fs/xfs/xfs_pnfs.c
+++ b/fs/xfs/xfs_pnfs.c
@@ -2,23 +2,16 @@
 /*
  * Copyright (c) 2014 Christoph Hellwig.
  */
-#include <linux/iomap.h>
 #include "xfs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_log.h"
 #include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
-#include "xfs_error.h"
 #include "xfs_iomap.h"
-#include "xfs_shared.h"
-#include "xfs_bit.h"
-#include "xfs_pnfs.h"
 
 /*
  * Ensure that we do not have any outstanding pNFS layouts that can be used by
@@ -185,7 +178,7 @@ xfs_fs_map_blocks(
 	}
 	xfs_iunlock(ip, XFS_IOLOCK_EXCL);
 
-	xfs_bmbt_to_iomap(ip, iomap, &imap);
+	error = xfs_bmbt_to_iomap(ip, iomap, &imap, false);
 	*device_generation = mp->m_generation;
 	return error;
 out_unlock:
diff --git a/fs/xfs/xfs_pwork.c b/fs/xfs/xfs_pwork.c
new file mode 100644
index 000000000000..4bcc3e61056c
--- /dev/null
+++ b/fs/xfs/xfs_pwork.c
@@ -0,0 +1,136 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#include "xfs.h"
+#include "xfs_fs.h"
+#include "xfs_shared.h"
+#include "xfs_format.h"
+#include "xfs_log_format.h"
+#include "xfs_trans_resv.h"
+#include "xfs_mount.h"
+#include "xfs_trace.h"
+#include "xfs_sysctl.h"
+#include "xfs_pwork.h"
+#include <linux/nmi.h>
+
+/*
+ * Parallel Work Queue
+ * ===================
+ *
+ * Abstract away the details of running a large and "obviously" parallelizable
+ * task across multiple CPUs.  Callers initialize the pwork control object with
+ * a desired level of parallelization and a work function.  Next, they embed
+ * struct xfs_pwork in whatever structure they use to pass work context to a
+ * worker thread and queue that pwork.  The work function will be passed the
+ * pwork item when it is run (from process context) and any returned error will
+ * be recorded in xfs_pwork_ctl.error.  Work functions should check for errors
+ * and abort if necessary; the non-zeroness of xfs_pwork_ctl.error does not
+ * stop workqueue item processing.
+ *
+ * This is the rough equivalent of the xfsprogs workqueue code, though we can't
+ * reuse that name here.
+ */
+
+/* Invoke our caller's function. */
+static void
+xfs_pwork_work(
+	struct work_struct	*work)
+{
+	struct xfs_pwork	*pwork;
+	struct xfs_pwork_ctl	*pctl;
+	int			error;
+
+	pwork = container_of(work, struct xfs_pwork, work);
+	pctl = pwork->pctl;
+	error = pctl->work_fn(pctl->mp, pwork);
+	if (error && !pctl->error)
+		pctl->error = error;
+	if (atomic_dec_and_test(&pctl->nr_work))
+		wake_up(&pctl->poll_wait);
+}
+
+/*
+ * Set up control data for parallel work.  @work_fn is the function that will
+ * be called.  @tag will be written into the kernel threads.  @nr_threads is
+ * the level of parallelism desired, or 0 for no limit.
+ */
+int
+xfs_pwork_init(
+	struct xfs_mount	*mp,
+	struct xfs_pwork_ctl	*pctl,
+	xfs_pwork_work_fn	work_fn,
+	const char		*tag,
+	unsigned int		nr_threads)
+{
+#ifdef DEBUG
+	if (xfs_globals.pwork_threads >= 0)
+		nr_threads = xfs_globals.pwork_threads;
+#endif
+	trace_xfs_pwork_init(mp, nr_threads, current->pid);
+
+	pctl->wq = alloc_workqueue("%s-%d", WQ_FREEZABLE, nr_threads, tag,
+			current->pid);
+	if (!pctl->wq)
+		return -ENOMEM;
+	pctl->work_fn = work_fn;
+	pctl->error = 0;
+	pctl->mp = mp;
+	atomic_set(&pctl->nr_work, 0);
+	init_waitqueue_head(&pctl->poll_wait);
+
+	return 0;
+}
+
+/* Queue some parallel work. */
+void
+xfs_pwork_queue(
+	struct xfs_pwork_ctl	*pctl,
+	struct xfs_pwork	*pwork)
+{
+	INIT_WORK(&pwork->work, xfs_pwork_work);
+	pwork->pctl = pctl;
+	atomic_inc(&pctl->nr_work);
+	queue_work(pctl->wq, &pwork->work);
+}
+
+/* Wait for the work to finish and tear down the control structure. */
+int
+xfs_pwork_destroy(
+	struct xfs_pwork_ctl	*pctl)
+{
+	destroy_workqueue(pctl->wq);
+	pctl->wq = NULL;
+	return pctl->error;
+}
+
+/*
+ * Wait for the work to finish by polling completion status and touch the soft
+ * lockup watchdog.  This is for callers such as mount which hold locks.
+ */
+void
+xfs_pwork_poll(
+	struct xfs_pwork_ctl	*pctl)
+{
+	while (wait_event_timeout(pctl->poll_wait,
+				atomic_read(&pctl->nr_work) == 0, HZ) == 0)
+		touch_softlockup_watchdog();
+}
+
+/*
+ * Return the amount of parallelism that the data device can handle, or 0 for
+ * no limit.
+ */
+unsigned int
+xfs_pwork_guess_datadev_parallelism(
+	struct xfs_mount	*mp)
+{
+	struct xfs_buftarg	*btp = mp->m_ddev_targp;
+
+	/*
+	 * For now we'll go with the most conservative setting possible,
+	 * which is two threads for an SSD and 1 thread everywhere else.
+	 */
+	return blk_queue_nonrot(btp->bt_bdev->bd_queue) ? 2 : 1;
+}
diff --git a/fs/xfs/xfs_pwork.h b/fs/xfs/xfs_pwork.h
new file mode 100644
index 000000000000..8133124cf3bb
--- /dev/null
+++ b/fs/xfs/xfs_pwork.h
@@ -0,0 +1,61 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+/*
+ * Copyright (C) 2019 Oracle.  All Rights Reserved.
+ * Author: Darrick J. Wong <darrick.wong@oracle.com>
+ */
+#ifndef __XFS_PWORK_H__
+#define __XFS_PWORK_H__
+
+struct xfs_pwork;
+struct xfs_mount;
+
+typedef int (*xfs_pwork_work_fn)(struct xfs_mount *mp, struct xfs_pwork *pwork);
+
+/*
+ * Parallel work coordination structure.
+ */
+struct xfs_pwork_ctl {
+	struct workqueue_struct	*wq;
+	struct xfs_mount	*mp;
+	xfs_pwork_work_fn	work_fn;
+	struct wait_queue_head	poll_wait;
+	atomic_t		nr_work;
+	int			error;
+};
+
+/*
+ * Embed this parallel work control item inside your own work structure,
+ * then queue work with it.
+ */
+struct xfs_pwork {
+	struct work_struct	work;
+	struct xfs_pwork_ctl	*pctl;
+};
+
+#define XFS_PWORK_SINGLE_THREADED	{ .pctl = NULL }
+
+/* Have we been told to abort? */
+static inline bool
+xfs_pwork_ctl_want_abort(
+	struct xfs_pwork_ctl	*pctl)
+{
+	return pctl && pctl->error;
+}
+
+/* Have we been told to abort? */
+static inline bool
+xfs_pwork_want_abort(
+	struct xfs_pwork	*pwork)
+{
+	return xfs_pwork_ctl_want_abort(pwork->pctl);
+}
+
+int xfs_pwork_init(struct xfs_mount *mp, struct xfs_pwork_ctl *pctl,
+		xfs_pwork_work_fn work_fn, const char *tag,
+		unsigned int nr_threads);
+void xfs_pwork_queue(struct xfs_pwork_ctl *pctl, struct xfs_pwork *pwork);
+int xfs_pwork_destroy(struct xfs_pwork_ctl *pctl);
+void xfs_pwork_poll(struct xfs_pwork_ctl *pctl);
+unsigned int xfs_pwork_guess_datadev_parallelism(struct xfs_mount *mp);
+
+#endif /* __XFS_PWORK_H__ */
diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 52ed7904df10..5e7a37f0cf84 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -13,19 +13,15 @@
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
-#include "xfs_ialloc.h"
-#include "xfs_itable.h"
+#include "xfs_iwalk.h"
 #include "xfs_quota.h"
-#include "xfs_error.h"
 #include "xfs_bmap.h"
-#include "xfs_bmap_btree.h"
 #include "xfs_bmap_util.h"
 #include "xfs_trans.h"
 #include "xfs_trans_space.h"
 #include "xfs_qm.h"
 #include "xfs_trace.h"
 #include "xfs_icache.h"
-#include "xfs_cksum.h"
 
 /*
  * The global quota manager. There is only one of these for the entire
@@ -1118,17 +1114,15 @@ xfs_qm_quotacheck_dqadjust(
 /* ARGSUSED */
 STATIC int
 xfs_qm_dqusage_adjust(
-	xfs_mount_t	*mp,		/* mount point for filesystem */
-	xfs_ino_t	ino,		/* inode number to get data for */
-	void		__user *buffer,	/* not used */
-	int		ubsize,		/* not used */
-	int		*ubused,	/* not used */
-	int		*res)		/* result code value */
+	struct xfs_mount	*mp,
+	struct xfs_trans	*tp,
+	xfs_ino_t		ino,
+	void			*data)
 {
-	xfs_inode_t	*ip;
-	xfs_qcnt_t	nblks;
-	xfs_filblks_t	rtblks = 0;	/* total rt blks */
-	int		error;
+	struct xfs_inode	*ip;
+	xfs_qcnt_t		nblks;
+	xfs_filblks_t		rtblks = 0;	/* total rt blks */
+	int			error;
 
 	ASSERT(XFS_IS_QUOTA_RUNNING(mp));
 
@@ -1136,20 +1130,18 @@ xfs_qm_dqusage_adjust(
 	 * rootino must have its resources accounted for, not so with the quota
 	 * inodes.
 	 */
-	if (xfs_is_quota_inode(&mp->m_sb, ino)) {
-		*res = BULKSTAT_RV_NOTHING;
-		return -EINVAL;
-	}
+	if (xfs_is_quota_inode(&mp->m_sb, ino))
+		return 0;
 
 	/*
 	 * We don't _need_ to take the ilock EXCL here because quotacheck runs
 	 * at mount time and therefore nobody will be racing chown/chproj.
 	 */
-	error = xfs_iget(mp, NULL, ino, XFS_IGET_DONTCACHE, 0, &ip);
-	if (error) {
-		*res = BULKSTAT_RV_NOTHING;
+	error = xfs_iget(mp, tp, ino, XFS_IGET_DONTCACHE, 0, &ip);
+	if (error == -EINVAL || error == -ENOENT)
+		return 0;
+	if (error)
 		return error;
-	}
 
 	ASSERT(ip->i_delayed_blks == 0);
 
@@ -1157,7 +1149,7 @@ xfs_qm_dqusage_adjust(
 		struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, XFS_DATA_FORK);
 
 		if (!(ifp->if_flags & XFS_IFEXTENTS)) {
-			error = xfs_iread_extents(NULL, ip, XFS_DATA_FORK);
+			error = xfs_iread_extents(tp, ip, XFS_DATA_FORK);
 			if (error)
 				goto error0;
 		}
@@ -1200,13 +1192,8 @@ xfs_qm_dqusage_adjust(
 			goto error0;
 	}
 
-	xfs_irele(ip);
-	*res = BULKSTAT_RV_DIDONE;
-	return 0;
-
 error0:
 	xfs_irele(ip);
-	*res = BULKSTAT_RV_GIVEUP;
 	return error;
 }
 
@@ -1270,18 +1257,13 @@ STATIC int
 xfs_qm_quotacheck(
 	xfs_mount_t	*mp)
 {
-	int			done, count, error, error2;
-	xfs_ino_t		lastino;
-	size_t			structsz;
+	int			error, error2;
 	uint			flags;
 	LIST_HEAD		(buffer_list);
 	struct xfs_inode	*uip = mp->m_quotainfo->qi_uquotaip;
 	struct xfs_inode	*gip = mp->m_quotainfo->qi_gquotaip;
 	struct xfs_inode	*pip = mp->m_quotainfo->qi_pquotaip;
 
-	count = INT_MAX;
-	structsz = 1;
-	lastino = 0;
 	flags = 0;
 
 	ASSERT(uip || gip || pip);
@@ -1318,18 +1300,10 @@ xfs_qm_quotacheck(
 		flags |= XFS_PQUOTA_CHKD;
 	}
 
-	do {
-		/*
-		 * Iterate thru all the inodes in the file system,
-		 * adjusting the corresponding dquot counters in core.
-		 */
-		error = xfs_bulkstat(mp, &lastino, &count,
-				     xfs_qm_dqusage_adjust,
-				     structsz, NULL, &done);
-		if (error)
-			break;
-
-	} while (!done);
+	error = xfs_iwalk_threaded(mp, 0, 0, xfs_qm_dqusage_adjust, 0, true,
+			NULL);
+	if (error)
+		goto error_return;
 
 	/*
 	 * We've made all the changes that we need to make incore.  Flush them
@@ -1812,7 +1786,8 @@ xfs_qm_vop_chown_reserve(
 	uint			flags)
 {
 	struct xfs_mount	*mp = ip->i_mount;
-	uint			delblks, blkflags, prjflags = 0;
+	uint64_t		delblks;
+	unsigned int		blkflags, prjflags = 0;
 	struct xfs_dquot	*udq_unres = NULL;
 	struct xfs_dquot	*gdq_unres = NULL;
 	struct xfs_dquot	*pdq_unres = NULL;
diff --git a/fs/xfs/xfs_qm.h b/fs/xfs/xfs_qm.h
index 3ccf0fbc9071..b41b75089548 100644
--- a/fs/xfs/xfs_qm.h
+++ b/fs/xfs/xfs_qm.h
@@ -113,12 +113,8 @@ xfs_quota_inode(xfs_mount_t *mp, uint dq_flags)
 	return NULL;
 }
 
-extern void	xfs_trans_mod_dquot(struct xfs_trans *,
-					struct xfs_dquot *, uint, long);
-extern int	xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
-			struct xfs_mount *, struct xfs_dquot *,
-			struct xfs_dquot *, struct xfs_dquot *,
-			long, long, uint);
+extern void	xfs_trans_mod_dquot(struct xfs_trans *tp, struct xfs_dquot *dqp,
+				    uint field, int64_t delta);
 extern void	xfs_trans_dqjoin(struct xfs_trans *, struct xfs_dquot *);
 extern void	xfs_trans_log_dquot(struct xfs_trans *, struct xfs_dquot *);
 
diff --git a/fs/xfs/xfs_qm_bhv.c b/fs/xfs/xfs_qm_bhv.c
index 3091e4bc04ef..5d72e88598b4 100644
--- a/fs/xfs/xfs_qm_bhv.c
+++ b/fs/xfs/xfs_qm_bhv.c
@@ -5,13 +5,13 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_quota.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
-#include "xfs_error.h"
 #include "xfs_trans.h"
 #include "xfs_qm.h"
 
diff --git a/fs/xfs/xfs_qm_syscalls.c b/fs/xfs/xfs_qm_syscalls.c
index b3190890f096..da7ad0383037 100644
--- a/fs/xfs/xfs_qm_syscalls.c
+++ b/fs/xfs/xfs_qm_syscalls.c
@@ -4,7 +4,6 @@
  * All Rights Reserved.
  */
 
-#include <linux/capability.h>
 
 #include "xfs.h"
 #include "xfs_fs.h"
@@ -12,17 +11,13 @@
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
-#include "xfs_bit.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_error.h"
 #include "xfs_quota.h"
 #include "xfs_qm.h"
-#include "xfs_trace.h"
 #include "xfs_icache.h"
-#include "xfs_defer.h"
 
 STATIC int	xfs_qm_log_quotaoff(xfs_mount_t *, xfs_qoff_logitem_t **, uint);
 STATIC int	xfs_qm_log_quotaoff_end(xfs_mount_t *, xfs_qoff_logitem_t *,
diff --git a/fs/xfs/xfs_quota.h b/fs/xfs/xfs_quota.h
index 55b798265ef7..efe42ae7a2f3 100644
--- a/fs/xfs/xfs_quota.h
+++ b/fs/xfs/xfs_quota.h
@@ -56,32 +56,35 @@ xfs_quota_chkd_flag(
  * The structure kept inside the xfs_trans_t keep track of dquot changes
  * within a transaction and apply them later.
  */
-typedef struct xfs_dqtrx {
+struct xfs_dqtrx {
 	struct xfs_dquot *qt_dquot;	  /* the dquot this refers to */
-	ulong		qt_blk_res;	  /* blks reserved on a dquot */
-	ulong		qt_ino_res;	  /* inode reserved on a dquot */
-	ulong		qt_ino_res_used;  /* inodes used from the reservation */
-	long		qt_bcount_delta;  /* dquot blk count changes */
-	long		qt_delbcnt_delta; /* delayed dquot blk count changes */
-	long		qt_icount_delta;  /* dquot inode count changes */
-	ulong		qt_rtblk_res;	  /* # blks reserved on a dquot */
-	ulong		qt_rtblk_res_used;/* # blks used from reservation */
-	long		qt_rtbcount_delta;/* dquot realtime blk changes */
-	long		qt_delrtb_delta;  /* delayed RT blk count changes */
-} xfs_dqtrx_t;
+
+	uint64_t	qt_blk_res;	  /* blks reserved on a dquot */
+	int64_t		qt_bcount_delta;  /* dquot blk count changes */
+	int64_t		qt_delbcnt_delta; /* delayed dquot blk count changes */
+
+	uint64_t	qt_rtblk_res;	  /* # blks reserved on a dquot */
+	uint64_t	qt_rtblk_res_used;/* # blks used from reservation */
+	int64_t		qt_rtbcount_delta;/* dquot realtime blk changes */
+	int64_t		qt_delrtb_delta;  /* delayed RT blk count changes */
+
+	uint64_t	qt_ino_res;	  /* inode reserved on a dquot */
+	uint64_t	qt_ino_res_used;  /* inodes used from the reservation */
+	int64_t		qt_icount_delta;  /* dquot inode count changes */
+};
 
 #ifdef CONFIG_XFS_QUOTA
 extern void xfs_trans_dup_dqinfo(struct xfs_trans *, struct xfs_trans *);
 extern void xfs_trans_free_dqinfo(struct xfs_trans *);
 extern void xfs_trans_mod_dquot_byino(struct xfs_trans *, struct xfs_inode *,
-		uint, long);
+		uint, int64_t);
 extern void xfs_trans_apply_dquot_deltas(struct xfs_trans *);
 extern void xfs_trans_unreserve_and_mod_dquots(struct xfs_trans *);
 extern int xfs_trans_reserve_quota_nblks(struct xfs_trans *,
-		struct xfs_inode *, long, long, uint);
+		struct xfs_inode *, int64_t, long, uint);
 extern int xfs_trans_reserve_quota_bydquots(struct xfs_trans *,
 		struct xfs_mount *, struct xfs_dquot *,
-		struct xfs_dquot *, struct xfs_dquot *, long, long, uint);
+		struct xfs_dquot *, struct xfs_dquot *, int64_t, long, uint);
 
 extern int xfs_qm_vop_dqalloc(struct xfs_inode *, xfs_dqid_t, xfs_dqid_t,
 		prid_t, uint, struct xfs_dquot **, struct xfs_dquot **,
@@ -121,14 +124,14 @@ xfs_qm_vop_dqalloc(struct xfs_inode *ip, xfs_dqid_t uid, xfs_dqid_t gid,
 #define xfs_trans_apply_dquot_deltas(tp)
 #define xfs_trans_unreserve_and_mod_dquots(tp)
 static inline int xfs_trans_reserve_quota_nblks(struct xfs_trans *tp,
-		struct xfs_inode *ip, long nblks, long ninos, uint flags)
+		struct xfs_inode *ip, int64_t nblks, long ninos, uint flags)
 {
 	return 0;
 }
 static inline int xfs_trans_reserve_quota_bydquots(struct xfs_trans *tp,
 		struct xfs_mount *mp, struct xfs_dquot *udqp,
 		struct xfs_dquot *gdqp, struct xfs_dquot *pdqp,
-		long nblks, long nions, uint flags)
+		int64_t nblks, long nions, uint flags)
 {
 	return 0;
 }
diff --git a/fs/xfs/xfs_quotaops.c b/fs/xfs/xfs_quotaops.c
index a7c0c657dfaf..cd6c7210a373 100644
--- a/fs/xfs/xfs_quotaops.c
+++ b/fs/xfs/xfs_quotaops.c
@@ -4,6 +4,7 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
@@ -11,10 +12,8 @@
 #include "xfs_inode.h"
 #include "xfs_quota.h"
 #include "xfs_trans.h"
-#include "xfs_trace.h"
 #include "xfs_icache.h"
 #include "xfs_qm.h"
-#include <linux/quota.h>
 
 
 static void
diff --git a/fs/xfs/xfs_refcount_item.c b/fs/xfs/xfs_refcount_item.c
index fce38b56b962..d8288aa0670a 100644
--- a/fs/xfs/xfs_refcount_item.c
+++ b/fs/xfs/xfs_refcount_item.c
@@ -14,7 +14,6 @@
 #include "xfs_defer.h"
 #include "xfs_trans.h"
 #include "xfs_trans_priv.h"
-#include "xfs_buf_item.h"
 #include "xfs_refcount_item.h"
 #include "xfs_log.h"
 #include "xfs_refcount.h"
@@ -95,15 +94,6 @@ xfs_cui_item_format(
 }
 
 /*
- * Pinning has no meaning for an cui item, so just return.
- */
-STATIC void
-xfs_cui_item_pin(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
  * The unpin operation is the last place an CUI is manipulated in the log. It is
  * either inserted in the AIL or aborted in the event of a log I/O error. In
  * either case, the CUI transaction has been successfully committed to make it
@@ -122,71 +112,22 @@ xfs_cui_item_unpin(
 }
 
 /*
- * CUI items have no locking or pushing.  However, since CUIs are pulled from
- * the AIL when their corresponding CUDs are committed to disk, their situation
- * is very similar to being pinned.  Return XFS_ITEM_PINNED so that the caller
- * will eventually flush the log.  This should help in getting the CUI out of
- * the AIL.
- */
-STATIC uint
-xfs_cui_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
-{
-	return XFS_ITEM_PINNED;
-}
-
-/*
  * The CUI has been either committed or aborted if the transaction has been
  * cancelled. If the transaction was cancelled, an CUD isn't going to be
  * constructed and thus we free the CUI here directly.
  */
 STATIC void
-xfs_cui_item_unlock(
+xfs_cui_item_release(
 	struct xfs_log_item	*lip)
 {
-	if (test_bit(XFS_LI_ABORTED, &lip->li_flags))
-		xfs_cui_release(CUI_ITEM(lip));
+	xfs_cui_release(CUI_ITEM(lip));
 }
 
-/*
- * The CUI is logged only once and cannot be moved in the log, so simply return
- * the lsn at which it's been logged.
- */
-STATIC xfs_lsn_t
-xfs_cui_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	return lsn;
-}
-
-/*
- * The CUI dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
-STATIC void
-xfs_cui_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-}
-
-/*
- * This is the ops vector shared by all cui log items.
- */
 static const struct xfs_item_ops xfs_cui_item_ops = {
 	.iop_size	= xfs_cui_item_size,
 	.iop_format	= xfs_cui_item_format,
-	.iop_pin	= xfs_cui_item_pin,
 	.iop_unpin	= xfs_cui_item_unpin,
-	.iop_unlock	= xfs_cui_item_unlock,
-	.iop_committed	= xfs_cui_item_committed,
-	.iop_push	= xfs_cui_item_push,
-	.iop_committing = xfs_cui_item_committing,
+	.iop_release	= xfs_cui_item_release,
 };
 
 /*
@@ -254,126 +195,250 @@ xfs_cud_item_format(
 }
 
 /*
- * Pinning has no meaning for an cud item, so just return.
+ * The CUD is either committed or aborted if the transaction is cancelled. If
+ * the transaction is cancelled, drop our reference to the CUI and free the
+ * CUD.
  */
 STATIC void
-xfs_cud_item_pin(
+xfs_cud_item_release(
 	struct xfs_log_item	*lip)
 {
+	struct xfs_cud_log_item	*cudp = CUD_ITEM(lip);
+
+	xfs_cui_release(cudp->cud_cuip);
+	kmem_zone_free(xfs_cud_zone, cudp);
 }
 
-/*
- * Since pinning has no meaning for an cud item, unpinning does
- * not either.
- */
-STATIC void
-xfs_cud_item_unpin(
-	struct xfs_log_item	*lip,
-	int			remove)
+static const struct xfs_item_ops xfs_cud_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
+	.iop_size	= xfs_cud_item_size,
+	.iop_format	= xfs_cud_item_format,
+	.iop_release	= xfs_cud_item_release,
+};
+
+static struct xfs_cud_log_item *
+xfs_trans_get_cud(
+	struct xfs_trans		*tp,
+	struct xfs_cui_log_item		*cuip)
 {
+	struct xfs_cud_log_item		*cudp;
+
+	cudp = kmem_zone_zalloc(xfs_cud_zone, KM_SLEEP);
+	xfs_log_item_init(tp->t_mountp, &cudp->cud_item, XFS_LI_CUD,
+			  &xfs_cud_item_ops);
+	cudp->cud_cuip = cuip;
+	cudp->cud_format.cud_cui_id = cuip->cui_format.cui_id;
+
+	xfs_trans_add_item(tp, &cudp->cud_item);
+	return cudp;
 }
 
 /*
- * There isn't much you can do to push on an cud item.  It is simply stuck
- * waiting for the log to be flushed to disk.
+ * Finish an refcount update and log it to the CUD. Note that the
+ * transaction is marked dirty regardless of whether the refcount
+ * update succeeds or fails to support the CUI/CUD lifecycle rules.
  */
-STATIC uint
-xfs_cud_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
+static int
+xfs_trans_log_finish_refcount_update(
+	struct xfs_trans		*tp,
+	struct xfs_cud_log_item		*cudp,
+	enum xfs_refcount_intent_type	type,
+	xfs_fsblock_t			startblock,
+	xfs_extlen_t			blockcount,
+	xfs_fsblock_t			*new_fsb,
+	xfs_extlen_t			*new_len,
+	struct xfs_btree_cur		**pcur)
 {
-	return XFS_ITEM_PINNED;
+	int				error;
+
+	error = xfs_refcount_finish_one(tp, type, startblock,
+			blockcount, new_fsb, new_len, pcur);
+
+	/*
+	 * Mark the transaction dirty, even on error. This ensures the
+	 * transaction is aborted, which:
+	 *
+	 * 1.) releases the CUI and frees the CUD
+	 * 2.) shuts down the filesystem
+	 */
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	set_bit(XFS_LI_DIRTY, &cudp->cud_item.li_flags);
+
+	return error;
 }
 
-/*
- * The CUD is either committed or aborted if the transaction is cancelled. If
- * the transaction is cancelled, drop our reference to the CUI and free the
- * CUD.
- */
-STATIC void
-xfs_cud_item_unlock(
-	struct xfs_log_item	*lip)
+/* Sort refcount intents by AG. */
+static int
+xfs_refcount_update_diff_items(
+	void				*priv,
+	struct list_head		*a,
+	struct list_head		*b)
 {
-	struct xfs_cud_log_item	*cudp = CUD_ITEM(lip);
+	struct xfs_mount		*mp = priv;
+	struct xfs_refcount_intent	*ra;
+	struct xfs_refcount_intent	*rb;
+
+	ra = container_of(a, struct xfs_refcount_intent, ri_list);
+	rb = container_of(b, struct xfs_refcount_intent, ri_list);
+	return  XFS_FSB_TO_AGNO(mp, ra->ri_startblock) -
+		XFS_FSB_TO_AGNO(mp, rb->ri_startblock);
+}
 
-	if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) {
-		xfs_cui_release(cudp->cud_cuip);
-		kmem_zone_free(xfs_cud_zone, cudp);
+/* Get an CUI. */
+STATIC void *
+xfs_refcount_update_create_intent(
+	struct xfs_trans		*tp,
+	unsigned int			count)
+{
+	struct xfs_cui_log_item		*cuip;
+
+	ASSERT(tp != NULL);
+	ASSERT(count > 0);
+
+	cuip = xfs_cui_init(tp->t_mountp, count);
+	ASSERT(cuip != NULL);
+
+	/*
+	 * Get a log_item_desc to point at the new item.
+	 */
+	xfs_trans_add_item(tp, &cuip->cui_item);
+	return cuip;
+}
+
+/* Set the phys extent flags for this reverse mapping. */
+static void
+xfs_trans_set_refcount_flags(
+	struct xfs_phys_extent		*refc,
+	enum xfs_refcount_intent_type	type)
+{
+	refc->pe_flags = 0;
+	switch (type) {
+	case XFS_REFCOUNT_INCREASE:
+	case XFS_REFCOUNT_DECREASE:
+	case XFS_REFCOUNT_ALLOC_COW:
+	case XFS_REFCOUNT_FREE_COW:
+		refc->pe_flags |= type;
+		break;
+	default:
+		ASSERT(0);
 	}
 }
 
-/*
- * When the cud item is committed to disk, all we need to do is delete our
- * reference to our partner cui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_cud_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+/* Log refcount updates in the intent item. */
+STATIC void
+xfs_refcount_update_log_item(
+	struct xfs_trans		*tp,
+	void				*intent,
+	struct list_head		*item)
 {
-	struct xfs_cud_log_item	*cudp = CUD_ITEM(lip);
+	struct xfs_cui_log_item		*cuip = intent;
+	struct xfs_refcount_intent	*refc;
+	uint				next_extent;
+	struct xfs_phys_extent		*ext;
+
+	refc = container_of(item, struct xfs_refcount_intent, ri_list);
+
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	set_bit(XFS_LI_DIRTY, &cuip->cui_item.li_flags);
 
 	/*
-	 * Drop the CUI reference regardless of whether the CUD has been
-	 * aborted. Once the CUD transaction is constructed, it is the sole
-	 * responsibility of the CUD to release the CUI (even if the CUI is
-	 * aborted due to log I/O error).
+	 * atomic_inc_return gives us the value after the increment;
+	 * we want to use it as an array index so we need to subtract 1 from
+	 * it.
 	 */
-	xfs_cui_release(cudp->cud_cuip);
-	kmem_zone_free(xfs_cud_zone, cudp);
+	next_extent = atomic_inc_return(&cuip->cui_next_extent) - 1;
+	ASSERT(next_extent < cuip->cui_format.cui_nextents);
+	ext = &cuip->cui_format.cui_extents[next_extent];
+	ext->pe_startblock = refc->ri_startblock;
+	ext->pe_len = refc->ri_blockcount;
+	xfs_trans_set_refcount_flags(ext, refc->ri_type);
+}
 
-	return (xfs_lsn_t)-1;
+/* Get an CUD so we can process all the deferred refcount updates. */
+STATIC void *
+xfs_refcount_update_create_done(
+	struct xfs_trans		*tp,
+	void				*intent,
+	unsigned int			count)
+{
+	return xfs_trans_get_cud(tp, intent);
 }
 
-/*
- * The CUD dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
-STATIC void
-xfs_cud_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+/* Process a deferred refcount update. */
+STATIC int
+xfs_refcount_update_finish_item(
+	struct xfs_trans		*tp,
+	struct list_head		*item,
+	void				*done_item,
+	void				**state)
 {
+	struct xfs_refcount_intent	*refc;
+	xfs_fsblock_t			new_fsb;
+	xfs_extlen_t			new_aglen;
+	int				error;
+
+	refc = container_of(item, struct xfs_refcount_intent, ri_list);
+	error = xfs_trans_log_finish_refcount_update(tp, done_item,
+			refc->ri_type,
+			refc->ri_startblock,
+			refc->ri_blockcount,
+			&new_fsb, &new_aglen,
+			(struct xfs_btree_cur **)state);
+	/* Did we run out of reservation?  Requeue what we didn't finish. */
+	if (!error && new_aglen > 0) {
+		ASSERT(refc->ri_type == XFS_REFCOUNT_INCREASE ||
+		       refc->ri_type == XFS_REFCOUNT_DECREASE);
+		refc->ri_startblock = new_fsb;
+		refc->ri_blockcount = new_aglen;
+		return -EAGAIN;
+	}
+	kmem_free(refc);
+	return error;
 }
 
-/*
- * This is the ops vector shared by all cud log items.
- */
-static const struct xfs_item_ops xfs_cud_item_ops = {
-	.iop_size	= xfs_cud_item_size,
-	.iop_format	= xfs_cud_item_format,
-	.iop_pin	= xfs_cud_item_pin,
-	.iop_unpin	= xfs_cud_item_unpin,
-	.iop_unlock	= xfs_cud_item_unlock,
-	.iop_committed	= xfs_cud_item_committed,
-	.iop_push	= xfs_cud_item_push,
-	.iop_committing = xfs_cud_item_committing,
-};
+/* Clean up after processing deferred refcounts. */
+STATIC void
+xfs_refcount_update_finish_cleanup(
+	struct xfs_trans	*tp,
+	void			*state,
+	int			error)
+{
+	struct xfs_btree_cur	*rcur = state;
 
-/*
- * Allocate and initialize an cud item with the given number of extents.
- */
-struct xfs_cud_log_item *
-xfs_cud_init(
-	struct xfs_mount		*mp,
-	struct xfs_cui_log_item		*cuip)
+	xfs_refcount_finish_one_cleanup(tp, rcur, error);
+}
 
+/* Abort all pending CUIs. */
+STATIC void
+xfs_refcount_update_abort_intent(
+	void				*intent)
 {
-	struct xfs_cud_log_item	*cudp;
+	xfs_cui_release(intent);
+}
 
-	cudp = kmem_zone_zalloc(xfs_cud_zone, KM_SLEEP);
-	xfs_log_item_init(mp, &cudp->cud_item, XFS_LI_CUD, &xfs_cud_item_ops);
-	cudp->cud_cuip = cuip;
-	cudp->cud_format.cud_cui_id = cuip->cui_format.cui_id;
+/* Cancel a deferred refcount update. */
+STATIC void
+xfs_refcount_update_cancel_item(
+	struct list_head		*item)
+{
+	struct xfs_refcount_intent	*refc;
 
-	return cudp;
+	refc = container_of(item, struct xfs_refcount_intent, ri_list);
+	kmem_free(refc);
 }
 
+const struct xfs_defer_op_type xfs_refcount_update_defer_type = {
+	.max_items	= XFS_CUI_MAX_FAST_EXTENTS,
+	.diff_items	= xfs_refcount_update_diff_items,
+	.create_intent	= xfs_refcount_update_create_intent,
+	.abort_intent	= xfs_refcount_update_abort_intent,
+	.log_item	= xfs_refcount_update_log_item,
+	.create_done	= xfs_refcount_update_create_done,
+	.finish_item	= xfs_refcount_update_finish_item,
+	.finish_cleanup = xfs_refcount_update_finish_cleanup,
+	.cancel_item	= xfs_refcount_update_cancel_item,
+};
+
 /*
  * Process a refcount update intent item that was recovered from the log.
  * We need to update the refcountbt.
diff --git a/fs/xfs/xfs_refcount_item.h b/fs/xfs/xfs_refcount_item.h
index 3896dcc2368f..e47530f30489 100644
--- a/fs/xfs/xfs_refcount_item.h
+++ b/fs/xfs/xfs_refcount_item.h
@@ -78,8 +78,6 @@ extern struct kmem_zone	*xfs_cui_zone;
 extern struct kmem_zone	*xfs_cud_zone;
 
 struct xfs_cui_log_item *xfs_cui_init(struct xfs_mount *, uint);
-struct xfs_cud_log_item *xfs_cud_init(struct xfs_mount *,
-		struct xfs_cui_log_item *);
 void xfs_cui_item_free(struct xfs_cui_log_item *);
 void xfs_cui_release(struct xfs_cui_log_item *);
 int xfs_cui_recover(struct xfs_trans *parent_tp, struct xfs_cui_log_item *cuip);
diff --git a/fs/xfs/xfs_reflink.c b/fs/xfs/xfs_reflink.c
index c5b4fa004ca4..c4ec7afd1170 100644
--- a/fs/xfs/xfs_reflink.c
+++ b/fs/xfs/xfs_reflink.c
@@ -11,21 +11,12 @@
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
 #include "xfs_defer.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
-#include "xfs_inode_item.h"
 #include "xfs_bmap.h"
 #include "xfs_bmap_util.h"
-#include "xfs_error.h"
-#include "xfs_dir2.h"
-#include "xfs_dir2_priv.h"
-#include "xfs_ioctl.h"
 #include "xfs_trace.h"
-#include "xfs_log.h"
 #include "xfs_icache.h"
-#include "xfs_pnfs.h"
 #include "xfs_btree.h"
 #include "xfs_refcount_btree.h"
 #include "xfs_refcount.h"
@@ -33,11 +24,9 @@
 #include "xfs_trans_space.h"
 #include "xfs_bit.h"
 #include "xfs_alloc.h"
-#include "xfs_quota_defs.h"
 #include "xfs_quota.h"
 #include "xfs_reflink.h"
 #include "xfs_iomap.h"
-#include "xfs_rmap_btree.h"
 #include "xfs_sb.h"
 #include "xfs_ag_resv.h"
 
@@ -192,7 +181,7 @@ xfs_reflink_trim_around_shared(
 	int			error = 0;
 
 	/* Holes, unwritten, and delalloc extents cannot be shared */
-	if (!xfs_is_reflink_inode(ip) || !xfs_bmap_is_real_extent(irec)) {
+	if (!xfs_is_cow_inode(ip) || !xfs_bmap_is_real_extent(irec)) {
 		*shared = false;
 		return 0;
 	}
@@ -234,93 +223,59 @@ xfs_reflink_trim_around_shared(
 	}
 }
 
-/*
- * Trim the passed in imap to the next shared/unshared extent boundary, and
- * if imap->br_startoff points to a shared extent reserve space for it in the
- * COW fork.
- *
- * Note that imap will always contain the block numbers for the existing blocks
- * in the data fork, as the upper layers need them for read-modify-write
- * operations.
- */
-int
-xfs_reflink_reserve_cow(
+bool
+xfs_inode_need_cow(
 	struct xfs_inode	*ip,
-	struct xfs_bmbt_irec	*imap)
+	struct xfs_bmbt_irec	*imap,
+	bool			*shared)
 {
-	struct xfs_ifork	*ifp = XFS_IFORK_PTR(ip, XFS_COW_FORK);
-	struct xfs_bmbt_irec	got;
-	int			error = 0;
-	bool			eof = false;
-	struct xfs_iext_cursor	icur;
-	bool			shared;
-
-	/*
-	 * Search the COW fork extent list first.  This serves two purposes:
-	 * first this implement the speculative preallocation using cowextisze,
-	 * so that we also unshared block adjacent to shared blocks instead
-	 * of just the shared blocks themselves.  Second the lookup in the
-	 * extent list is generally faster than going out to the shared extent
-	 * tree.
-	 */
-
-	if (!xfs_iext_lookup_extent(ip, ifp, imap->br_startoff, &icur, &got))
-		eof = true;
-	if (!eof && got.br_startoff <= imap->br_startoff) {
-		trace_xfs_reflink_cow_found(ip, imap);
-		xfs_trim_extent(imap, got.br_startoff, got.br_blockcount);
+	/* We can't update any real extents in always COW mode. */
+	if (xfs_is_always_cow_inode(ip) &&
+	    !isnullstartblock(imap->br_startblock)) {
+		*shared = true;
 		return 0;
 	}
 
 	/* Trim the mapping to the nearest shared extent boundary. */
-	error = xfs_reflink_trim_around_shared(ip, imap, &shared);
-	if (error)
-		return error;
-
-	/* Not shared?  Just report the (potentially capped) extent. */
-	if (!shared)
-		return 0;
-
-	/*
-	 * Fork all the shared blocks from our write offset until the end of
-	 * the extent.
-	 */
-	error = xfs_qm_dqattach_locked(ip, false);
-	if (error)
-		return error;
-
-	error = xfs_bmapi_reserve_delalloc(ip, XFS_COW_FORK, imap->br_startoff,
-			imap->br_blockcount, 0, &got, &icur, eof);
-	if (error == -ENOSPC || error == -EDQUOT)
-		trace_xfs_reflink_cow_enospc(ip, imap);
-	if (error)
-		return error;
-
-	xfs_trim_extent(imap, got.br_startoff, got.br_blockcount);
-	trace_xfs_reflink_cow_alloc(ip, &got);
-	return 0;
+	return xfs_reflink_trim_around_shared(ip, imap, shared);
 }
 
-/* Convert part of an unwritten CoW extent to a real one. */
-STATIC int
-xfs_reflink_convert_cow_extent(
-	struct xfs_inode		*ip,
-	struct xfs_bmbt_irec		*imap,
-	xfs_fileoff_t			offset_fsb,
-	xfs_filblks_t			count_fsb)
+static int
+xfs_reflink_convert_cow_locked(
+	struct xfs_inode	*ip,
+	xfs_fileoff_t		offset_fsb,
+	xfs_filblks_t		count_fsb)
 {
-	int				nimaps = 1;
+	struct xfs_iext_cursor	icur;
+	struct xfs_bmbt_irec	got;
+	struct xfs_btree_cur	*dummy_cur = NULL;
+	int			dummy_logflags;
+	int			error = 0;
 
-	if (imap->br_state == XFS_EXT_NORM)
+	if (!xfs_iext_lookup_extent(ip, ip->i_cowfp, offset_fsb, &icur, &got))
 		return 0;
 
-	xfs_trim_extent(imap, offset_fsb, count_fsb);
-	trace_xfs_reflink_convert_cow(ip, imap);
-	if (imap->br_blockcount == 0)
-		return 0;
-	return xfs_bmapi_write(NULL, ip, imap->br_startoff, imap->br_blockcount,
-			XFS_BMAPI_COWFORK | XFS_BMAPI_CONVERT, 0, imap,
-			&nimaps);
+	do {
+		if (got.br_startoff >= offset_fsb + count_fsb)
+			break;
+		if (got.br_state == XFS_EXT_NORM)
+			continue;
+		if (WARN_ON_ONCE(isnullstartblock(got.br_startblock)))
+			return -EIO;
+
+		xfs_trim_extent(&got, offset_fsb, count_fsb);
+		if (!got.br_blockcount)
+			continue;
+
+		got.br_state = XFS_EXT_NORM;
+		error = xfs_bmap_add_extent_unwritten_real(NULL, ip,
+				XFS_COW_FORK, &icur, &dummy_cur, &got,
+				&dummy_logflags);
+		if (error)
+			return error;
+	} while (xfs_iext_next_extent(ip->i_cowfp, &icur, &got));
+
+	return error;
 }
 
 /* Convert all of the unwritten CoW extents in a file's range to real ones. */
@@ -334,15 +289,12 @@ xfs_reflink_convert_cow(
 	xfs_fileoff_t		offset_fsb = XFS_B_TO_FSBT(mp, offset);
 	xfs_fileoff_t		end_fsb = XFS_B_TO_FSB(mp, offset + count);
 	xfs_filblks_t		count_fsb = end_fsb - offset_fsb;
-	struct xfs_bmbt_irec	imap;
-	int			nimaps = 1, error = 0;
+	int			error;
 
 	ASSERT(count != 0);
 
 	xfs_ilock(ip, XFS_ILOCK_EXCL);
-	error = xfs_bmapi_write(NULL, ip, offset_fsb, count_fsb,
-			XFS_BMAPI_COWFORK | XFS_BMAPI_CONVERT |
-			XFS_BMAPI_CONVERT_ONLY, 0, &imap, &nimaps);
+	error = xfs_reflink_convert_cow_locked(ip, offset_fsb, count_fsb);
 	xfs_iunlock(ip, XFS_ILOCK_EXCL);
 	return error;
 }
@@ -375,7 +327,7 @@ xfs_find_trim_cow_extent(
 	if (got.br_startoff > offset_fsb) {
 		xfs_trim_extent(imap, imap->br_startoff,
 				got.br_startoff - imap->br_startoff);
-		return xfs_reflink_trim_around_shared(ip, imap, shared);
+		return xfs_inode_need_cow(ip, imap, shared);
 	}
 
 	*shared = true;
@@ -397,7 +349,8 @@ xfs_reflink_allocate_cow(
 	struct xfs_inode	*ip,
 	struct xfs_bmbt_irec	*imap,
 	bool			*shared,
-	uint			*lockmode)
+	uint			*lockmode,
+	bool			convert_now)
 {
 	struct xfs_mount	*mp = ip->i_mount;
 	xfs_fileoff_t		offset_fsb = imap->br_startoff;
@@ -409,7 +362,10 @@ xfs_reflink_allocate_cow(
 	xfs_extlen_t		resblks = 0;
 
 	ASSERT(xfs_isilocked(ip, XFS_ILOCK_EXCL));
-	ASSERT(xfs_is_reflink_inode(ip));
+	if (!ip->i_cowfp) {
+		ASSERT(!xfs_is_reflink_inode(ip));
+		xfs_ifork_init_cow(ip);
+	}
 
 	error = xfs_find_trim_cow_extent(ip, imap, shared, &found);
 	if (error || !*shared)
@@ -471,7 +427,16 @@ xfs_reflink_allocate_cow(
 	if (nimaps == 0)
 		return -ENOSPC;
 convert:
-	return xfs_reflink_convert_cow_extent(ip, imap, offset_fsb, count_fsb);
+	xfs_trim_extent(imap, offset_fsb, count_fsb);
+	/*
+	 * COW fork extents are supposed to remain unwritten until we're ready
+	 * to initiate a disk write.  For direct I/O we are going to write the
+	 * data and need the conversion, but for buffered writes we're done.
+	 */
+	if (!convert_now || imap->br_state == XFS_EXT_NORM)
+		return 0;
+	trace_xfs_reflink_convert_cow(ip, imap);
+	return xfs_reflink_convert_cow_locked(ip, offset_fsb, count_fsb);
 
 out_unreserve:
 	xfs_trans_unreserve_quota_nblks(tp, ip, (long)resblks, 0,
@@ -586,7 +551,7 @@ xfs_reflink_cancel_cow_range(
 	int			error;
 
 	trace_xfs_reflink_cancel_cow_range(ip, offset, count);
-	ASSERT(xfs_is_reflink_inode(ip));
+	ASSERT(ip->i_cowfp);
 
 	offset_fsb = XFS_B_TO_FSBT(ip->i_mount, offset);
 	if (count == NULLFILEOFF)
@@ -596,7 +561,7 @@ xfs_reflink_cancel_cow_range(
 
 	/* Start a rolling transaction to remove the mappings */
 	error = xfs_trans_alloc(ip->i_mount, &M_RES(ip->i_mount)->tr_write,
-			0, 0, XFS_TRANS_NOFS, &tp);
+			0, 0, 0, &tp);
 	if (error)
 		goto out;
 
@@ -655,7 +620,7 @@ xfs_reflink_end_cow_extent(
 
 	resblks = XFS_EXTENTADD_SPACE_RES(mp, XFS_DATA_FORK);
 	error = xfs_trans_alloc(mp, &M_RES(mp)->tr_write, resblks, 0,
-			XFS_TRANS_RESERVE | XFS_TRANS_NOFS, &tp);
+			XFS_TRANS_RESERVE, &tp);
 	if (error)
 		return error;
 
@@ -1192,7 +1157,7 @@ xfs_reflink_remap_blocks(
 			break;
 		ASSERT(nimaps == 1);
 
-		trace_xfs_reflink_remap_imap(src, srcoff, len, XFS_IO_OVERWRITE,
+		trace_xfs_reflink_remap_imap(src, srcoff, len, XFS_DATA_FORK,
 				&imap);
 
 		/* Translate imap into the destination file. */
diff --git a/fs/xfs/xfs_reflink.h b/fs/xfs/xfs_reflink.h
index 6d73daef1f13..28a43b7f581d 100644
--- a/fs/xfs/xfs_reflink.h
+++ b/fs/xfs/xfs_reflink.h
@@ -6,16 +6,28 @@
 #ifndef __XFS_REFLINK_H
 #define __XFS_REFLINK_H 1
 
+static inline bool xfs_is_always_cow_inode(struct xfs_inode *ip)
+{
+	return ip->i_mount->m_always_cow &&
+		xfs_sb_version_hasreflink(&ip->i_mount->m_sb);
+}
+
+static inline bool xfs_is_cow_inode(struct xfs_inode *ip)
+{
+	return xfs_is_reflink_inode(ip) || xfs_is_always_cow_inode(ip);
+}
+
 extern int xfs_reflink_find_shared(struct xfs_mount *mp, struct xfs_trans *tp,
 		xfs_agnumber_t agno, xfs_agblock_t agbno, xfs_extlen_t aglen,
 		xfs_agblock_t *fbno, xfs_extlen_t *flen, bool find_maximal);
 extern int xfs_reflink_trim_around_shared(struct xfs_inode *ip,
 		struct xfs_bmbt_irec *irec, bool *shared);
+bool xfs_inode_need_cow(struct xfs_inode *ip, struct xfs_bmbt_irec *imap,
+		bool *shared);
 
-extern int xfs_reflink_reserve_cow(struct xfs_inode *ip,
-		struct xfs_bmbt_irec *imap);
 extern int xfs_reflink_allocate_cow(struct xfs_inode *ip,
-		struct xfs_bmbt_irec *imap, bool *shared, uint *lockmode);
+		struct xfs_bmbt_irec *imap, bool *shared, uint *lockmode,
+		bool convert_now);
 extern int xfs_reflink_convert_cow(struct xfs_inode *ip, xfs_off_t offset,
 		xfs_off_t count);
 
diff --git a/fs/xfs/xfs_rmap_item.c b/fs/xfs/xfs_rmap_item.c
index 127dc9c32a54..77ed557b6127 100644
--- a/fs/xfs/xfs_rmap_item.c
+++ b/fs/xfs/xfs_rmap_item.c
@@ -14,7 +14,6 @@
 #include "xfs_defer.h"
 #include "xfs_trans.h"
 #include "xfs_trans_priv.h"
-#include "xfs_buf_item.h"
 #include "xfs_rmap_item.h"
 #include "xfs_log.h"
 #include "xfs_rmap.h"
@@ -94,15 +93,6 @@ xfs_rui_item_format(
 }
 
 /*
- * Pinning has no meaning for an rui item, so just return.
- */
-STATIC void
-xfs_rui_item_pin(
-	struct xfs_log_item	*lip)
-{
-}
-
-/*
  * The unpin operation is the last place an RUI is manipulated in the log. It is
  * either inserted in the AIL or aborted in the event of a log I/O error. In
  * either case, the RUI transaction has been successfully committed to make it
@@ -121,71 +111,22 @@ xfs_rui_item_unpin(
 }
 
 /*
- * RUI items have no locking or pushing.  However, since RUIs are pulled from
- * the AIL when their corresponding RUDs are committed to disk, their situation
- * is very similar to being pinned.  Return XFS_ITEM_PINNED so that the caller
- * will eventually flush the log.  This should help in getting the RUI out of
- * the AIL.
- */
-STATIC uint
-xfs_rui_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
-{
-	return XFS_ITEM_PINNED;
-}
-
-/*
  * The RUI has been either committed or aborted if the transaction has been
  * cancelled. If the transaction was cancelled, an RUD isn't going to be
  * constructed and thus we free the RUI here directly.
  */
 STATIC void
-xfs_rui_item_unlock(
+xfs_rui_item_release(
 	struct xfs_log_item	*lip)
 {
-	if (test_bit(XFS_LI_ABORTED, &lip->li_flags))
-		xfs_rui_release(RUI_ITEM(lip));
+	xfs_rui_release(RUI_ITEM(lip));
 }
 
-/*
- * The RUI is logged only once and cannot be moved in the log, so simply return
- * the lsn at which it's been logged.
- */
-STATIC xfs_lsn_t
-xfs_rui_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-	return lsn;
-}
-
-/*
- * The RUI dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
-STATIC void
-xfs_rui_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
-{
-}
-
-/*
- * This is the ops vector shared by all rui log items.
- */
 static const struct xfs_item_ops xfs_rui_item_ops = {
 	.iop_size	= xfs_rui_item_size,
 	.iop_format	= xfs_rui_item_format,
-	.iop_pin	= xfs_rui_item_pin,
 	.iop_unpin	= xfs_rui_item_unpin,
-	.iop_unlock	= xfs_rui_item_unlock,
-	.iop_committed	= xfs_rui_item_committed,
-	.iop_push	= xfs_rui_item_push,
-	.iop_committing = xfs_rui_item_committing,
+	.iop_release	= xfs_rui_item_release,
 };
 
 /*
@@ -275,126 +216,271 @@ xfs_rud_item_format(
 }
 
 /*
- * Pinning has no meaning for an rud item, so just return.
+ * The RUD is either committed or aborted if the transaction is cancelled. If
+ * the transaction is cancelled, drop our reference to the RUI and free the
+ * RUD.
  */
 STATIC void
-xfs_rud_item_pin(
+xfs_rud_item_release(
 	struct xfs_log_item	*lip)
 {
+	struct xfs_rud_log_item	*rudp = RUD_ITEM(lip);
+
+	xfs_rui_release(rudp->rud_ruip);
+	kmem_zone_free(xfs_rud_zone, rudp);
 }
 
-/*
- * Since pinning has no meaning for an rud item, unpinning does
- * not either.
- */
-STATIC void
-xfs_rud_item_unpin(
-	struct xfs_log_item	*lip,
-	int			remove)
+static const struct xfs_item_ops xfs_rud_item_ops = {
+	.flags		= XFS_ITEM_RELEASE_WHEN_COMMITTED,
+	.iop_size	= xfs_rud_item_size,
+	.iop_format	= xfs_rud_item_format,
+	.iop_release	= xfs_rud_item_release,
+};
+
+static struct xfs_rud_log_item *
+xfs_trans_get_rud(
+	struct xfs_trans		*tp,
+	struct xfs_rui_log_item		*ruip)
 {
+	struct xfs_rud_log_item		*rudp;
+
+	rudp = kmem_zone_zalloc(xfs_rud_zone, KM_SLEEP);
+	xfs_log_item_init(tp->t_mountp, &rudp->rud_item, XFS_LI_RUD,
+			  &xfs_rud_item_ops);
+	rudp->rud_ruip = ruip;
+	rudp->rud_format.rud_rui_id = ruip->rui_format.rui_id;
+
+	xfs_trans_add_item(tp, &rudp->rud_item);
+	return rudp;
 }
 
-/*
- * There isn't much you can do to push on an rud item.  It is simply stuck
- * waiting for the log to be flushed to disk.
- */
-STATIC uint
-xfs_rud_item_push(
-	struct xfs_log_item	*lip,
-	struct list_head	*buffer_list)
+/* Set the map extent flags for this reverse mapping. */
+static void
+xfs_trans_set_rmap_flags(
+	struct xfs_map_extent		*rmap,
+	enum xfs_rmap_intent_type	type,
+	int				whichfork,
+	xfs_exntst_t			state)
 {
-	return XFS_ITEM_PINNED;
+	rmap->me_flags = 0;
+	if (state == XFS_EXT_UNWRITTEN)
+		rmap->me_flags |= XFS_RMAP_EXTENT_UNWRITTEN;
+	if (whichfork == XFS_ATTR_FORK)
+		rmap->me_flags |= XFS_RMAP_EXTENT_ATTR_FORK;
+	switch (type) {
+	case XFS_RMAP_MAP:
+		rmap->me_flags |= XFS_RMAP_EXTENT_MAP;
+		break;
+	case XFS_RMAP_MAP_SHARED:
+		rmap->me_flags |= XFS_RMAP_EXTENT_MAP_SHARED;
+		break;
+	case XFS_RMAP_UNMAP:
+		rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP;
+		break;
+	case XFS_RMAP_UNMAP_SHARED:
+		rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP_SHARED;
+		break;
+	case XFS_RMAP_CONVERT:
+		rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT;
+		break;
+	case XFS_RMAP_CONVERT_SHARED:
+		rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT_SHARED;
+		break;
+	case XFS_RMAP_ALLOC:
+		rmap->me_flags |= XFS_RMAP_EXTENT_ALLOC;
+		break;
+	case XFS_RMAP_FREE:
+		rmap->me_flags |= XFS_RMAP_EXTENT_FREE;
+		break;
+	default:
+		ASSERT(0);
+	}
 }
 
 /*
- * The RUD is either committed or aborted if the transaction is cancelled. If
- * the transaction is cancelled, drop our reference to the RUI and free the
- * RUD.
+ * Finish an rmap update and log it to the RUD. Note that the transaction is
+ * marked dirty regardless of whether the rmap update succeeds or fails to
+ * support the RUI/RUD lifecycle rules.
  */
-STATIC void
-xfs_rud_item_unlock(
-	struct xfs_log_item	*lip)
+static int
+xfs_trans_log_finish_rmap_update(
+	struct xfs_trans		*tp,
+	struct xfs_rud_log_item		*rudp,
+	enum xfs_rmap_intent_type	type,
+	uint64_t			owner,
+	int				whichfork,
+	xfs_fileoff_t			startoff,
+	xfs_fsblock_t			startblock,
+	xfs_filblks_t			blockcount,
+	xfs_exntst_t			state,
+	struct xfs_btree_cur		**pcur)
 {
-	struct xfs_rud_log_item	*rudp = RUD_ITEM(lip);
+	int				error;
 
-	if (test_bit(XFS_LI_ABORTED, &lip->li_flags)) {
-		xfs_rui_release(rudp->rud_ruip);
-		kmem_zone_free(xfs_rud_zone, rudp);
-	}
+	error = xfs_rmap_finish_one(tp, type, owner, whichfork, startoff,
+			startblock, blockcount, state, pcur);
+
+	/*
+	 * Mark the transaction dirty, even on error. This ensures the
+	 * transaction is aborted, which:
+	 *
+	 * 1.) releases the RUI and frees the RUD
+	 * 2.) shuts down the filesystem
+	 */
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	set_bit(XFS_LI_DIRTY, &rudp->rud_item.li_flags);
+
+	return error;
 }
 
-/*
- * When the rud item is committed to disk, all we need to do is delete our
- * reference to our partner rui item and then free ourselves. Since we're
- * freeing ourselves we must return -1 to keep the transaction code from
- * further referencing this item.
- */
-STATIC xfs_lsn_t
-xfs_rud_item_committed(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+/* Sort rmap intents by AG. */
+static int
+xfs_rmap_update_diff_items(
+	void				*priv,
+	struct list_head		*a,
+	struct list_head		*b)
 {
-	struct xfs_rud_log_item	*rudp = RUD_ITEM(lip);
+	struct xfs_mount		*mp = priv;
+	struct xfs_rmap_intent		*ra;
+	struct xfs_rmap_intent		*rb;
+
+	ra = container_of(a, struct xfs_rmap_intent, ri_list);
+	rb = container_of(b, struct xfs_rmap_intent, ri_list);
+	return  XFS_FSB_TO_AGNO(mp, ra->ri_bmap.br_startblock) -
+		XFS_FSB_TO_AGNO(mp, rb->ri_bmap.br_startblock);
+}
+
+/* Get an RUI. */
+STATIC void *
+xfs_rmap_update_create_intent(
+	struct xfs_trans		*tp,
+	unsigned int			count)
+{
+	struct xfs_rui_log_item		*ruip;
+
+	ASSERT(tp != NULL);
+	ASSERT(count > 0);
+
+	ruip = xfs_rui_init(tp->t_mountp, count);
+	ASSERT(ruip != NULL);
 
 	/*
-	 * Drop the RUI reference regardless of whether the RUD has been
-	 * aborted. Once the RUD transaction is constructed, it is the sole
-	 * responsibility of the RUD to release the RUI (even if the RUI is
-	 * aborted due to log I/O error).
+	 * Get a log_item_desc to point at the new item.
 	 */
-	xfs_rui_release(rudp->rud_ruip);
-	kmem_zone_free(xfs_rud_zone, rudp);
-
-	return (xfs_lsn_t)-1;
+	xfs_trans_add_item(tp, &ruip->rui_item);
+	return ruip;
 }
 
-/*
- * The RUD dependency tracking op doesn't do squat.  It can't because
- * it doesn't know where the free extent is coming from.  The dependency
- * tracking has to be handled by the "enclosing" metadata object.  For
- * example, for inodes, the inode is locked throughout the extent freeing
- * so the dependency should be recorded there.
- */
+/* Log rmap updates in the intent item. */
 STATIC void
-xfs_rud_item_committing(
-	struct xfs_log_item	*lip,
-	xfs_lsn_t		lsn)
+xfs_rmap_update_log_item(
+	struct xfs_trans		*tp,
+	void				*intent,
+	struct list_head		*item)
 {
+	struct xfs_rui_log_item		*ruip = intent;
+	struct xfs_rmap_intent		*rmap;
+	uint				next_extent;
+	struct xfs_map_extent		*map;
+
+	rmap = container_of(item, struct xfs_rmap_intent, ri_list);
+
+	tp->t_flags |= XFS_TRANS_DIRTY;
+	set_bit(XFS_LI_DIRTY, &ruip->rui_item.li_flags);
+
+	/*
+	 * atomic_inc_return gives us the value after the increment;
+	 * we want to use it as an array index so we need to subtract 1 from
+	 * it.
+	 */
+	next_extent = atomic_inc_return(&ruip->rui_next_extent) - 1;
+	ASSERT(next_extent < ruip->rui_format.rui_nextents);
+	map = &ruip->rui_format.rui_extents[next_extent];
+	map->me_owner = rmap->ri_owner;
+	map->me_startblock = rmap->ri_bmap.br_startblock;
+	map->me_startoff = rmap->ri_bmap.br_startoff;
+	map->me_len = rmap->ri_bmap.br_blockcount;
+	xfs_trans_set_rmap_flags(map, rmap->ri_type, rmap->ri_whichfork,
+			rmap->ri_bmap.br_state);
 }
 
-/*
- * This is the ops vector shared by all rud log items.
- */
-static const struct xfs_item_ops xfs_rud_item_ops = {
-	.iop_size	= xfs_rud_item_size,
-	.iop_format	= xfs_rud_item_format,
-	.iop_pin	= xfs_rud_item_pin,
-	.iop_unpin	= xfs_rud_item_unpin,
-	.iop_unlock	= xfs_rud_item_unlock,
-	.iop_committed	= xfs_rud_item_committed,
-	.iop_push	= xfs_rud_item_push,
-	.iop_committing = xfs_rud_item_committing,
-};
+/* Get an RUD so we can process all the deferred rmap updates. */
+STATIC void *
+xfs_rmap_update_create_done(
+	struct xfs_trans		*tp,
+	void				*intent,
+	unsigned int			count)
+{
+	return xfs_trans_get_rud(tp, intent);
+}
 
-/*
- * Allocate and initialize an rud item with the given number of extents.
- */
-struct xfs_rud_log_item *
-xfs_rud_init(
-	struct xfs_mount		*mp,
-	struct xfs_rui_log_item		*ruip)
+/* Process a deferred rmap update. */
+STATIC int
+xfs_rmap_update_finish_item(
+	struct xfs_trans		*tp,
+	struct list_head		*item,
+	void				*done_item,
+	void				**state)
+{
+	struct xfs_rmap_intent		*rmap;
+	int				error;
+
+	rmap = container_of(item, struct xfs_rmap_intent, ri_list);
+	error = xfs_trans_log_finish_rmap_update(tp, done_item,
+			rmap->ri_type,
+			rmap->ri_owner, rmap->ri_whichfork,
+			rmap->ri_bmap.br_startoff,
+			rmap->ri_bmap.br_startblock,
+			rmap->ri_bmap.br_blockcount,
+			rmap->ri_bmap.br_state,
+			(struct xfs_btree_cur **)state);
+	kmem_free(rmap);
+	return error;
+}
+
+/* Clean up after processing deferred rmaps. */
+STATIC void
+xfs_rmap_update_finish_cleanup(
+	struct xfs_trans	*tp,
+	void			*state,
+	int			error)
+{
+	struct xfs_btree_cur	*rcur = state;
+
+	xfs_rmap_finish_one_cleanup(tp, rcur, error);
+}
 
+/* Abort all pending RUIs. */
+STATIC void
+xfs_rmap_update_abort_intent(
+	void				*intent)
 {
-	struct xfs_rud_log_item	*rudp;
+	xfs_rui_release(intent);
+}
 
-	rudp = kmem_zone_zalloc(xfs_rud_zone, KM_SLEEP);
-	xfs_log_item_init(mp, &rudp->rud_item, XFS_LI_RUD, &xfs_rud_item_ops);
-	rudp->rud_ruip = ruip;
-	rudp->rud_format.rud_rui_id = ruip->rui_format.rui_id;
+/* Cancel a deferred rmap update. */
+STATIC void
+xfs_rmap_update_cancel_item(
+	struct list_head		*item)
+{
+	struct xfs_rmap_intent		*rmap;
 
-	return rudp;
+	rmap = container_of(item, struct xfs_rmap_intent, ri_list);
+	kmem_free(rmap);
 }
 
+const struct xfs_defer_op_type xfs_rmap_update_defer_type = {
+	.max_items	= XFS_RUI_MAX_FAST_EXTENTS,
+	.diff_items	= xfs_rmap_update_diff_items,
+	.create_intent	= xfs_rmap_update_create_intent,
+	.abort_intent	= xfs_rmap_update_abort_intent,
+	.log_item	= xfs_rmap_update_log_item,
+	.create_done	= xfs_rmap_update_create_done,
+	.finish_item	= xfs_rmap_update_finish_item,
+	.finish_cleanup = xfs_rmap_update_finish_cleanup,
+	.cancel_item	= xfs_rmap_update_cancel_item,
+};
+
 /*
  * Process an rmap update intent item that was recovered from the log.
  * We need to update the rmapbt.
diff --git a/fs/xfs/xfs_rmap_item.h b/fs/xfs/xfs_rmap_item.h
index 7e482baa27f5..8708e4a5aa5c 100644
--- a/fs/xfs/xfs_rmap_item.h
+++ b/fs/xfs/xfs_rmap_item.h
@@ -78,8 +78,6 @@ extern struct kmem_zone	*xfs_rui_zone;
 extern struct kmem_zone	*xfs_rud_zone;
 
 struct xfs_rui_log_item *xfs_rui_init(struct xfs_mount *, uint);
-struct xfs_rud_log_item *xfs_rud_init(struct xfs_mount *,
-		struct xfs_rui_log_item *);
 int xfs_rui_copy_format(struct xfs_log_iovec *buf,
 		struct xfs_rui_log_format *dst_rui_fmt);
 void xfs_rui_item_free(struct xfs_rui_log_item *);
diff --git a/fs/xfs/xfs_rtalloc.c b/fs/xfs/xfs_rtalloc.c
index ac0fcdad0c4e..5fa4db3c3e32 100644
--- a/fs/xfs/xfs_rtalloc.c
+++ b/fs/xfs/xfs_rtalloc.c
@@ -11,17 +11,11 @@
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
 #include "xfs_mount.h"
-#include "xfs_defer.h"
 #include "xfs_inode.h"
 #include "xfs_bmap.h"
-#include "xfs_bmap_util.h"
 #include "xfs_bmap_btree.h"
-#include "xfs_alloc.h"
-#include "xfs_error.h"
 #include "xfs_trans.h"
 #include "xfs_trans_space.h"
-#include "xfs_trace.h"
-#include "xfs_buf.h"
 #include "xfs_icache.h"
 #include "xfs_rtalloc.h"
 
diff --git a/fs/xfs/xfs_stats.c b/fs/xfs/xfs_stats.c
index cc509743facd..113883c4f202 100644
--- a/fs/xfs/xfs_stats.c
+++ b/fs/xfs/xfs_stats.c
@@ -4,7 +4,6 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
-#include <linux/proc_fs.h>
 
 struct xstats xfsstats;
 
diff --git a/fs/xfs/xfs_super.c b/fs/xfs/xfs_super.c
index c9097cb0b955..f9450235533c 100644
--- a/fs/xfs/xfs_super.c
+++ b/fs/xfs/xfs_super.c
@@ -11,18 +11,15 @@
 #include "xfs_trans_resv.h"
 #include "xfs_sb.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
 #include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_bmap.h"
 #include "xfs_alloc.h"
-#include "xfs_error.h"
 #include "xfs_fsops.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_log.h"
 #include "xfs_log_priv.h"
-#include "xfs_da_btree.h"
 #include "xfs_dir2.h"
 #include "xfs_extfree_item.h"
 #include "xfs_mru_cache.h"
@@ -38,18 +35,8 @@
 #include "xfs_refcount_item.h"
 #include "xfs_bmap_item.h"
 #include "xfs_reflink.h"
-#include "xfs_defer.h"
 
-#include <linux/namei.h>
-#include <linux/dax.h>
-#include <linux/init.h>
-#include <linux/slab.h>
 #include <linux/magic.h>
-#include <linux/mount.h>
-#include <linux/mempool.h>
-#include <linux/writeback.h>
-#include <linux/kthread.h>
-#include <linux/freezer.h>
 #include <linux/parser.h>
 
 static const struct super_operations xfs_super_operations;
@@ -66,7 +53,7 @@ static struct xfs_kobj xfs_dbg_kobj;	/* global debug sysfs attrs */
 enum {
 	Opt_logbufs, Opt_logbsize, Opt_logdev, Opt_rtdev, Opt_biosize,
 	Opt_wsync, Opt_noalign, Opt_swalloc, Opt_sunit, Opt_swidth, Opt_nouuid,
-	Opt_mtpt, Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
+	Opt_grpid, Opt_nogrpid, Opt_bsdgroups, Opt_sysvgroups,
 	Opt_allocsize, Opt_norecovery, Opt_inode64, Opt_inode32, Opt_ikeep,
 	Opt_noikeep, Opt_largeio, Opt_nolargeio, Opt_attr2, Opt_noattr2,
 	Opt_filestreams, Opt_quota, Opt_noquota, Opt_usrquota, Opt_grpquota,
@@ -87,7 +74,6 @@ static const match_table_t tokens = {
 	{Opt_sunit,	"sunit=%u"},	/* data volume stripe unit */
 	{Opt_swidth,	"swidth=%u"},	/* data volume stripe width */
 	{Opt_nouuid,	"nouuid"},	/* ignore filesystem UUID */
-	{Opt_mtpt,	"mtpt"},	/* filesystem mount point */
 	{Opt_grpid,	"grpid"},	/* group-ID from parent directory */
 	{Opt_nogrpid,	"nogrpid"},	/* group-ID from current process */
 	{Opt_bsdgroups,	"bsdgroups"},	/* group-ID from parent directory */
@@ -236,9 +222,6 @@ xfs_parseargs(
 			if (!mp->m_logname)
 				return -ENOMEM;
 			break;
-		case Opt_mtpt:
-			xfs_warn(mp, "%s option not allowed on this system", p);
-			return -EINVAL;
 		case Opt_rtdev:
 			kfree(mp->m_rtname);
 			mp->m_rtname = match_strdup(args);
@@ -448,7 +431,7 @@ struct proc_xfs_info {
 	char		*str;
 };
 
-STATIC int
+STATIC void
 xfs_showargs(
 	struct xfs_mount	*mp,
 	struct seq_file		*m)
@@ -527,9 +510,8 @@ xfs_showargs(
 
 	if (!(mp->m_qflags & XFS_ALL_QUOTA_ACCT))
 		seq_puts(m, ",noquota");
-
-	return 0;
 }
+
 static uint64_t
 xfs_max_file_offset(
 	unsigned int		blockshift)
@@ -539,26 +521,18 @@ xfs_max_file_offset(
 
 	/* Figure out maximum filesize, on Linux this can depend on
 	 * the filesystem blocksize (on 32 bit platforms).
-	 * __block_write_begin does this in an [unsigned] long...
+	 * __block_write_begin does this in an [unsigned] long long...
 	 *      page->index << (PAGE_SHIFT - bbits)
 	 * So, for page sized blocks (4K on 32 bit platforms),
 	 * this wraps at around 8Tb (hence MAX_LFS_FILESIZE which is
 	 *      (((u64)PAGE_SIZE << (BITS_PER_LONG-1))-1)
 	 * but for smaller blocksizes it is less (bbits = log2 bsize).
-	 * Note1: get_block_t takes a long (implicit cast from above)
-	 * Note2: The Large Block Device (LBD and HAVE_SECTOR_T) patch
-	 * can optionally convert the [unsigned] long from above into
-	 * an [unsigned] long long.
 	 */
 
 #if BITS_PER_LONG == 32
-# if defined(CONFIG_LBDAF)
 	ASSERT(sizeof(sector_t) == 8);
 	pagefactor = PAGE_SIZE;
 	bitshift = BITS_PER_LONG;
-# else
-	pagefactor = PAGE_SIZE >> (PAGE_SHIFT - blockshift);
-# endif
 #endif
 
 	return (((uint64_t)pagefactor) << bitshift) - 1;
@@ -595,7 +569,7 @@ xfs_set_inode_alloc(
 	 * Calculate how much should be reserved for inodes to meet
 	 * the max inode percentage.  Used only for inode32.
 	 */
-	if (mp->m_maxicount) {
+	if (M_IGEO(mp)->maxicount) {
 		uint64_t	icount;
 
 		icount = sbp->sb_dblocks * sbp->sb_imax_pct;
@@ -838,15 +812,10 @@ xfs_init_mount_workqueues(
 	if (!mp->m_buf_workqueue)
 		goto out;
 
-	mp->m_data_workqueue = alloc_workqueue("xfs-data/%s",
-			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
-	if (!mp->m_data_workqueue)
-		goto out_destroy_buf;
-
 	mp->m_unwritten_workqueue = alloc_workqueue("xfs-conv/%s",
 			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
 	if (!mp->m_unwritten_workqueue)
-		goto out_destroy_data_iodone_queue;
+		goto out_destroy_buf;
 
 	mp->m_cil_workqueue = alloc_workqueue("xfs-cil/%s",
 			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
@@ -858,16 +827,10 @@ xfs_init_mount_workqueues(
 	if (!mp->m_reclaim_workqueue)
 		goto out_destroy_cil;
 
-	mp->m_log_workqueue = alloc_workqueue("xfs-log/%s",
-			WQ_MEM_RECLAIM|WQ_FREEZABLE|WQ_HIGHPRI, 0,
-			mp->m_fsname);
-	if (!mp->m_log_workqueue)
-		goto out_destroy_reclaim;
-
 	mp->m_eofblocks_workqueue = alloc_workqueue("xfs-eofblocks/%s",
 			WQ_MEM_RECLAIM|WQ_FREEZABLE, 0, mp->m_fsname);
 	if (!mp->m_eofblocks_workqueue)
-		goto out_destroy_log;
+		goto out_destroy_reclaim;
 
 	mp->m_sync_workqueue = alloc_workqueue("xfs-sync/%s", WQ_FREEZABLE, 0,
 					       mp->m_fsname);
@@ -878,16 +841,12 @@ xfs_init_mount_workqueues(
 
 out_destroy_eofb:
 	destroy_workqueue(mp->m_eofblocks_workqueue);
-out_destroy_log:
-	destroy_workqueue(mp->m_log_workqueue);
 out_destroy_reclaim:
 	destroy_workqueue(mp->m_reclaim_workqueue);
 out_destroy_cil:
 	destroy_workqueue(mp->m_cil_workqueue);
 out_destroy_unwritten:
 	destroy_workqueue(mp->m_unwritten_workqueue);
-out_destroy_data_iodone_queue:
-	destroy_workqueue(mp->m_data_workqueue);
 out_destroy_buf:
 	destroy_workqueue(mp->m_buf_workqueue);
 out:
@@ -900,10 +859,8 @@ xfs_destroy_mount_workqueues(
 {
 	destroy_workqueue(mp->m_sync_workqueue);
 	destroy_workqueue(mp->m_eofblocks_workqueue);
-	destroy_workqueue(mp->m_log_workqueue);
 	destroy_workqueue(mp->m_reclaim_workqueue);
 	destroy_workqueue(mp->m_cil_workqueue);
-	destroy_workqueue(mp->m_data_workqueue);
 	destroy_workqueue(mp->m_unwritten_workqueue);
 	destroy_workqueue(mp->m_buf_workqueue);
 }
@@ -1152,10 +1109,10 @@ xfs_fs_statfs(
 
 	fakeinos = XFS_FSB_TO_INO(mp, statp->f_bfree);
 	statp->f_files = min(icount + fakeinos, (uint64_t)XFS_MAXINUMBER);
-	if (mp->m_maxicount)
+	if (M_IGEO(mp)->maxicount)
 		statp->f_files = min_t(typeof(statp->f_files),
 					statp->f_files,
-					mp->m_maxicount);
+					M_IGEO(mp)->maxicount);
 
 	/* If sb_icount overshot maxicount, report actual allocation */
 	statp->f_files = max_t(typeof(statp->f_files),
@@ -1376,7 +1333,7 @@ xfs_fs_remount(
 			xfs_force_shutdown(mp, SHUTDOWN_CORRUPT_INCORE);
 			return error;
 		}
-		xfs_icache_enable_reclaim(mp);
+		xfs_start_block_reaping(mp);
 
 		/* Create the per-AG metadata reservation pool .*/
 		error = xfs_fs_reserve_ag_blocks(mp);
@@ -1390,7 +1347,7 @@ xfs_fs_remount(
 		 * Cancel background eofb scanning so it cannot race with the
 		 * final log force+buftarg wait and deadlock the remount.
 		 */
-		xfs_icache_disable_reclaim(mp);
+		xfs_stop_block_reaping(mp);
 
 		/* Get rid of any leftover CoW reservations... */
 		error = xfs_icache_free_cowblocks(mp, NULL);
@@ -1434,7 +1391,7 @@ xfs_fs_freeze(
 {
 	struct xfs_mount	*mp = XFS_M(sb);
 
-	xfs_icache_disable_reclaim(mp);
+	xfs_stop_block_reaping(mp);
 	xfs_save_resvblks(mp);
 	xfs_quiesce_attr(mp);
 	return xfs_sync_sb(mp, true);
@@ -1448,7 +1405,7 @@ xfs_fs_unfreeze(
 
 	xfs_restore_resvblks(mp);
 	xfs_log_work_queue(mp);
-	xfs_icache_enable_reclaim(mp);
+	xfs_start_block_reaping(mp);
 	return 0;
 }
 
@@ -1457,7 +1414,8 @@ xfs_fs_show_options(
 	struct seq_file		*m,
 	struct dentry		*root)
 {
-	return xfs_showargs(XFS_M(root->d_sb), m);
+	xfs_showargs(XFS_M(root->d_sb), m);
+	return 0;
 }
 
 /*
@@ -1546,8 +1504,14 @@ xfs_init_percpu_counters(
 	if (error)
 		goto free_ifree;
 
+	error = percpu_counter_init(&mp->m_delalloc_blks, 0, GFP_KERNEL);
+	if (error)
+		goto free_fdblocks;
+
 	return 0;
 
+free_fdblocks:
+	percpu_counter_destroy(&mp->m_fdblocks);
 free_ifree:
 	percpu_counter_destroy(&mp->m_ifree);
 free_icount:
@@ -1571,6 +1535,9 @@ xfs_destroy_percpu_counters(
 	percpu_counter_destroy(&mp->m_icount);
 	percpu_counter_destroy(&mp->m_ifree);
 	percpu_counter_destroy(&mp->m_fdblocks);
+	ASSERT(XFS_FORCED_SHUTDOWN(mp) ||
+	       percpu_counter_sum(&mp->m_delalloc_blks) == 0);
+	percpu_counter_destroy(&mp->m_delalloc_blks);
 }
 
 static struct xfs_mount *
@@ -1594,6 +1561,13 @@ xfs_mount_alloc(
 	INIT_DELAYED_WORK(&mp->m_eofblocks_work, xfs_eofblocks_worker);
 	INIT_DELAYED_WORK(&mp->m_cowblocks_work, xfs_cowblocks_worker);
 	mp->m_kobj.kobject.kset = xfs_kset;
+	/*
+	 * We don't create the finobt per-ag space reservation until after log
+	 * recovery, so we must set this to true so that an ifree transaction
+	 * started during log recovery will not depend on space reservations
+	 * for finobt expansion.
+	 */
+	mp->m_finobt_nores = true;
 	return mp;
 }
 
@@ -1689,6 +1663,8 @@ xfs_fs_fill_super(
 	sb->s_maxbytes = xfs_max_file_offset(sb->s_blocksize_bits);
 	sb->s_max_links = XFS_MAXLINK;
 	sb->s_time_gran = 1;
+	sb->s_iflags |= SB_I_CGROUPWB;
+
 	set_posix_acl_flag(sb);
 
 	/* version 5 superblocks support inode version counters. */
@@ -1729,11 +1705,18 @@ xfs_fs_fill_super(
 		}
 	}
 
-	if (xfs_sb_version_hasreflink(&mp->m_sb) && mp->m_sb.sb_rblocks) {
-		xfs_alert(mp,
+	if (xfs_sb_version_hasreflink(&mp->m_sb)) {
+		if (mp->m_sb.sb_rblocks) {
+			xfs_alert(mp,
 	"reflink not compatible with realtime device!");
-		error = -EINVAL;
-		goto out_filestream_unmount;
+			error = -EINVAL;
+			goto out_filestream_unmount;
+		}
+
+		if (xfs_globals.always_cow) {
+			xfs_info(mp, "using DEBUG-only always_cow mode.");
+			mp->m_always_cow = true;
+		}
 	}
 
 	if (xfs_sb_version_hasrmapbt(&mp->m_sb) && mp->m_sb.sb_rblocks) {
diff --git a/fs/xfs/xfs_super.h b/fs/xfs/xfs_super.h
index 21cb49a43d7c..763e43d22dee 100644
--- a/fs/xfs/xfs_super.h
+++ b/fs/xfs/xfs_super.h
@@ -38,6 +38,18 @@ extern void xfs_qm_exit(void);
 # define XFS_SCRUB_STRING
 #endif
 
+#ifdef CONFIG_XFS_ONLINE_REPAIR
+# define XFS_REPAIR_STRING	"repair, "
+#else
+# define XFS_REPAIR_STRING
+#endif
+
+#ifdef CONFIG_XFS_WARN
+# define XFS_WARN_STRING	"verbose warnings, "
+#else
+# define XFS_WARN_STRING
+#endif
+
 #ifdef DEBUG
 # define XFS_DBG_STRING		"debug"
 #else
@@ -49,6 +61,8 @@ extern void xfs_qm_exit(void);
 				XFS_SECURITY_STRING \
 				XFS_REALTIME_STRING \
 				XFS_SCRUB_STRING \
+				XFS_REPAIR_STRING \
+				XFS_WARN_STRING \
 				XFS_DBG_STRING /* DBG must be last */
 
 struct xfs_inode;
diff --git a/fs/xfs/xfs_symlink.c b/fs/xfs/xfs_symlink.c
index b2c1177c717f..ed66fd2de327 100644
--- a/fs/xfs/xfs_symlink.c
+++ b/fs/xfs/xfs_symlink.c
@@ -12,23 +12,14 @@
 #include "xfs_trans_resv.h"
 #include "xfs_bit.h"
 #include "xfs_mount.h"
-#include "xfs_da_format.h"
-#include "xfs_da_btree.h"
-#include "xfs_defer.h"
 #include "xfs_dir2.h"
 #include "xfs_inode.h"
-#include "xfs_ialloc.h"
-#include "xfs_alloc.h"
 #include "xfs_bmap.h"
 #include "xfs_bmap_btree.h"
-#include "xfs_bmap_util.h"
-#include "xfs_error.h"
 #include "xfs_quota.h"
 #include "xfs_trans_space.h"
 #include "xfs_trace.h"
-#include "xfs_symlink.h"
 #include "xfs_trans.h"
-#include "xfs_log.h"
 
 /* ----- Kernel only functions below ----- */
 int
diff --git a/fs/xfs/xfs_sysctl.c b/fs/xfs/xfs_sysctl.c
index 0cc034dfb786..31b3bdbd2eba 100644
--- a/fs/xfs/xfs_sysctl.c
+++ b/fs/xfs/xfs_sysctl.c
@@ -4,10 +4,7 @@
  * All Rights Reserved.
  */
 #include "xfs.h"
-#include <linux/sysctl.h>
-#include <linux/proc_fs.h>
 #include "xfs_error.h"
-#include "xfs_stats.h"
 
 static struct ctl_table_header *xfs_table_header;
 
diff --git a/fs/xfs/xfs_sysctl.h b/fs/xfs/xfs_sysctl.h
index 168488130a19..8abf4640f1d5 100644
--- a/fs/xfs/xfs_sysctl.h
+++ b/fs/xfs/xfs_sysctl.h
@@ -82,9 +82,13 @@ enum {
 extern xfs_param_t	xfs_params;
 
 struct xfs_globals {
+#ifdef DEBUG
+	int	pwork_threads;		/* parallel workqueue threads */
+#endif
 	int	log_recovery_delay;	/* log recovery delay (secs) */
 	int	mount_delay;		/* mount setup delay (secs) */
 	bool	bug_on_assert;		/* BUG() the kernel on assert failure */
+	bool	always_cow;		/* use COW fork for all overwrites */
 };
 extern struct xfs_globals	xfs_globals;
 
diff --git a/fs/xfs/xfs_sysfs.c b/fs/xfs/xfs_sysfs.c
index cd6a994a7250..ddd0bf7a4740 100644
--- a/fs/xfs/xfs_sysfs.c
+++ b/fs/xfs/xfs_sysfs.c
@@ -10,9 +10,7 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_sysfs.h"
-#include "xfs_log.h"
 #include "xfs_log_priv.h"
-#include "xfs_stats.h"
 #include "xfs_mount.h"
 
 struct xfs_sysfs_attr {
@@ -183,10 +181,74 @@ mount_delay_show(
 }
 XFS_SYSFS_ATTR_RW(mount_delay);
 
+static ssize_t
+always_cow_store(
+	struct kobject	*kobject,
+	const char	*buf,
+	size_t		count)
+{
+	ssize_t		ret;
+
+	ret = kstrtobool(buf, &xfs_globals.always_cow);
+	if (ret < 0)
+		return ret;
+	return count;
+}
+
+static ssize_t
+always_cow_show(
+	struct kobject	*kobject,
+	char		*buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.always_cow);
+}
+XFS_SYSFS_ATTR_RW(always_cow);
+
+#ifdef DEBUG
+/*
+ * Override how many threads the parallel work queue is allowed to create.
+ * This has to be a debug-only global (instead of an errortag) because one of
+ * the main users of parallel workqueues is mount time quotacheck.
+ */
+STATIC ssize_t
+pwork_threads_store(
+	struct kobject	*kobject,
+	const char	*buf,
+	size_t		count)
+{
+	int		ret;
+	int		val;
+
+	ret = kstrtoint(buf, 0, &val);
+	if (ret)
+		return ret;
+
+	if (val < -1 || val > num_possible_cpus())
+		return -EINVAL;
+
+	xfs_globals.pwork_threads = val;
+
+	return count;
+}
+
+STATIC ssize_t
+pwork_threads_show(
+	struct kobject	*kobject,
+	char		*buf)
+{
+	return snprintf(buf, PAGE_SIZE, "%d\n", xfs_globals.pwork_threads);
+}
+XFS_SYSFS_ATTR_RW(pwork_threads);
+#endif /* DEBUG */
+
 static struct attribute *xfs_dbg_attrs[] = {
 	ATTR_LIST(bug_on_assert),
 	ATTR_LIST(log_recovery_delay),
 	ATTR_LIST(mount_delay),
+	ATTR_LIST(always_cow),
+#ifdef DEBUG
+	ATTR_LIST(pwork_threads),
+#endif
 	NULL,
 };
 
diff --git a/fs/xfs/xfs_trace.c b/fs/xfs/xfs_trace.c
index cb6489c22cad..bc85b89f88ca 100644
--- a/fs/xfs/xfs_trace.c
+++ b/fs/xfs/xfs_trace.c
@@ -15,24 +15,16 @@
 #include "xfs_inode.h"
 #include "xfs_btree.h"
 #include "xfs_da_btree.h"
-#include "xfs_ialloc.h"
-#include "xfs_itable.h"
 #include "xfs_alloc.h"
 #include "xfs_bmap.h"
 #include "xfs_attr.h"
-#include "xfs_attr_leaf.h"
 #include "xfs_trans.h"
-#include "xfs_log.h"
 #include "xfs_log_priv.h"
 #include "xfs_buf_item.h"
 #include "xfs_quota.h"
-#include "xfs_iomap.h"
-#include "xfs_aops.h"
 #include "xfs_dquot_item.h"
 #include "xfs_dquot.h"
 #include "xfs_log_recover.h"
-#include "xfs_inode_item.h"
-#include "xfs_bmap_btree.h"
 #include "xfs_filestream.h"
 #include "xfs_fsmap.h"
 
diff --git a/fs/xfs/xfs_trace.h b/fs/xfs/xfs_trace.h
index 6fcc893dfc91..8094b1920eef 100644
--- a/fs/xfs/xfs_trace.h
+++ b/fs/xfs/xfs_trace.h
@@ -475,7 +475,7 @@ DEFINE_BUF_ITEM_EVENT(xfs_buf_item_ordered);
 DEFINE_BUF_ITEM_EVENT(xfs_buf_item_pin);
 DEFINE_BUF_ITEM_EVENT(xfs_buf_item_unpin);
 DEFINE_BUF_ITEM_EVENT(xfs_buf_item_unpin_stale);
-DEFINE_BUF_ITEM_EVENT(xfs_buf_item_unlock);
+DEFINE_BUF_ITEM_EVENT(xfs_buf_item_release);
 DEFINE_BUF_ITEM_EVENT(xfs_buf_item_committed);
 DEFINE_BUF_ITEM_EVENT(xfs_buf_item_push);
 DEFINE_BUF_ITEM_EVENT(xfs_trans_get_buf);
@@ -1218,23 +1218,17 @@ DEFINE_EVENT(xfs_readpage_class, name,	\
 DEFINE_READPAGE_EVENT(xfs_vm_readpage);
 DEFINE_READPAGE_EVENT(xfs_vm_readpages);
 
-TRACE_DEFINE_ENUM(XFS_IO_HOLE);
-TRACE_DEFINE_ENUM(XFS_IO_DELALLOC);
-TRACE_DEFINE_ENUM(XFS_IO_UNWRITTEN);
-TRACE_DEFINE_ENUM(XFS_IO_OVERWRITE);
-TRACE_DEFINE_ENUM(XFS_IO_COW);
-
 DECLARE_EVENT_CLASS(xfs_imap_class,
 	TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count,
-		 int type, struct xfs_bmbt_irec *irec),
-	TP_ARGS(ip, offset, count, type, irec),
+		 int whichfork, struct xfs_bmbt_irec *irec),
+	TP_ARGS(ip, offset, count, whichfork, irec),
 	TP_STRUCT__entry(
 		__field(dev_t, dev)
 		__field(xfs_ino_t, ino)
 		__field(loff_t, size)
 		__field(loff_t, offset)
 		__field(size_t, count)
-		__field(int, type)
+		__field(int, whichfork)
 		__field(xfs_fileoff_t, startoff)
 		__field(xfs_fsblock_t, startblock)
 		__field(xfs_filblks_t, blockcount)
@@ -1245,33 +1239,33 @@ DECLARE_EVENT_CLASS(xfs_imap_class,
 		__entry->size = ip->i_d.di_size;
 		__entry->offset = offset;
 		__entry->count = count;
-		__entry->type = type;
+		__entry->whichfork = whichfork;
 		__entry->startoff = irec ? irec->br_startoff : 0;
 		__entry->startblock = irec ? irec->br_startblock : 0;
 		__entry->blockcount = irec ? irec->br_blockcount : 0;
 	),
 	TP_printk("dev %d:%d ino 0x%llx size 0x%llx offset 0x%llx count %zd "
-		  "type %s startoff 0x%llx startblock %lld blockcount 0x%llx",
+		  "fork %s startoff 0x%llx startblock %lld blockcount 0x%llx",
 		  MAJOR(__entry->dev), MINOR(__entry->dev),
 		  __entry->ino,
 		  __entry->size,
 		  __entry->offset,
 		  __entry->count,
-		  __print_symbolic(__entry->type, XFS_IO_TYPES),
+		  __entry->whichfork == XFS_COW_FORK ? "cow" : "data",
 		  __entry->startoff,
 		  (int64_t)__entry->startblock,
 		  __entry->blockcount)
 )
 
-#define DEFINE_IOMAP_EVENT(name)	\
+#define DEFINE_IMAP_EVENT(name)	\
 DEFINE_EVENT(xfs_imap_class, name,	\
 	TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count,	\
-		 int type, struct xfs_bmbt_irec *irec),		\
-	TP_ARGS(ip, offset, count, type, irec))
-DEFINE_IOMAP_EVENT(xfs_map_blocks_found);
-DEFINE_IOMAP_EVENT(xfs_map_blocks_alloc);
-DEFINE_IOMAP_EVENT(xfs_iomap_alloc);
-DEFINE_IOMAP_EVENT(xfs_iomap_found);
+		 int whichfork, struct xfs_bmbt_irec *irec),		\
+	TP_ARGS(ip, offset, count, whichfork, irec))
+DEFINE_IMAP_EVENT(xfs_map_blocks_found);
+DEFINE_IMAP_EVENT(xfs_map_blocks_alloc);
+DEFINE_IMAP_EVENT(xfs_iomap_alloc);
+DEFINE_IMAP_EVENT(xfs_iomap_found);
 
 DECLARE_EVENT_CLASS(xfs_simple_io_class,
 	TP_PROTO(struct xfs_inode *ip, xfs_off_t offset, ssize_t count),
@@ -3078,7 +3072,7 @@ DEFINE_EVENT(xfs_inode_irec_class, name, \
 DEFINE_INODE_EVENT(xfs_reflink_set_inode_flag);
 DEFINE_INODE_EVENT(xfs_reflink_unset_inode_flag);
 DEFINE_ITRUNC_EVENT(xfs_reflink_update_inode_size);
-DEFINE_IOMAP_EVENT(xfs_reflink_remap_imap);
+DEFINE_IMAP_EVENT(xfs_reflink_remap_imap);
 TRACE_EVENT(xfs_reflink_remap_blocks_loop,
 	TP_PROTO(struct xfs_inode *src, xfs_fileoff_t soffset,
 		 xfs_filblks_t len, struct xfs_inode *dest,
@@ -3202,13 +3196,10 @@ DEFINE_INODE_ERROR_EVENT(xfs_reflink_unshare_error);
 
 /* copy on write */
 DEFINE_INODE_IREC_EVENT(xfs_reflink_trim_around_shared);
-DEFINE_INODE_IREC_EVENT(xfs_reflink_cow_alloc);
 DEFINE_INODE_IREC_EVENT(xfs_reflink_cow_found);
 DEFINE_INODE_IREC_EVENT(xfs_reflink_cow_enospc);
 DEFINE_INODE_IREC_EVENT(xfs_reflink_convert_cow);
 
-DEFINE_RW_EVENT(xfs_reflink_reserve_cow);
-
 DEFINE_SIMPLE_IO_EVENT(xfs_reflink_bounce_dio_write);
 
 DEFINE_SIMPLE_IO_EVENT(xfs_reflink_cancel_cow_range);
@@ -3369,8 +3360,221 @@ DEFINE_TRANS_EVENT(xfs_trans_dup);
 DEFINE_TRANS_EVENT(xfs_trans_free);
 DEFINE_TRANS_EVENT(xfs_trans_roll);
 DEFINE_TRANS_EVENT(xfs_trans_add_item);
+DEFINE_TRANS_EVENT(xfs_trans_commit_items);
 DEFINE_TRANS_EVENT(xfs_trans_free_items);
 
+TRACE_EVENT(xfs_iunlink_update_bucket,
+	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, unsigned int bucket,
+		 xfs_agino_t old_ptr, xfs_agino_t new_ptr),
+	TP_ARGS(mp, agno, bucket, old_ptr, new_ptr),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_agnumber_t, agno)
+		__field(unsigned int, bucket)
+		__field(xfs_agino_t, old_ptr)
+		__field(xfs_agino_t, new_ptr)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->agno = agno;
+		__entry->bucket = bucket;
+		__entry->old_ptr = old_ptr;
+		__entry->new_ptr = new_ptr;
+	),
+	TP_printk("dev %d:%d agno %u bucket %u old 0x%x new 0x%x",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->agno,
+		  __entry->bucket,
+		  __entry->old_ptr,
+		  __entry->new_ptr)
+);
+
+TRACE_EVENT(xfs_iunlink_update_dinode,
+	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, xfs_agino_t agino,
+		 xfs_agino_t old_ptr, xfs_agino_t new_ptr),
+	TP_ARGS(mp, agno, agino, old_ptr, new_ptr),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_agnumber_t, agno)
+		__field(xfs_agino_t, agino)
+		__field(xfs_agino_t, old_ptr)
+		__field(xfs_agino_t, new_ptr)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->agno = agno;
+		__entry->agino = agino;
+		__entry->old_ptr = old_ptr;
+		__entry->new_ptr = new_ptr;
+	),
+	TP_printk("dev %d:%d agno %u agino 0x%x old 0x%x new 0x%x",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->agno,
+		  __entry->agino,
+		  __entry->old_ptr,
+		  __entry->new_ptr)
+);
+
+DECLARE_EVENT_CLASS(xfs_ag_inode_class,
+	TP_PROTO(struct xfs_inode *ip),
+	TP_ARGS(ip),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_agnumber_t, agno)
+		__field(xfs_agino_t, agino)
+	),
+	TP_fast_assign(
+		__entry->dev = VFS_I(ip)->i_sb->s_dev;
+		__entry->agno = XFS_INO_TO_AGNO(ip->i_mount, ip->i_ino);
+		__entry->agino = XFS_INO_TO_AGINO(ip->i_mount, ip->i_ino);
+	),
+	TP_printk("dev %d:%d agno %u agino %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->agno, __entry->agino)
+)
+
+#define DEFINE_AGINODE_EVENT(name) \
+DEFINE_EVENT(xfs_ag_inode_class, name, \
+	TP_PROTO(struct xfs_inode *ip), \
+	TP_ARGS(ip))
+DEFINE_AGINODE_EVENT(xfs_iunlink);
+DEFINE_AGINODE_EVENT(xfs_iunlink_remove);
+DEFINE_AG_EVENT(xfs_iunlink_map_prev_fallback);
+
+DECLARE_EVENT_CLASS(xfs_fs_corrupt_class,
+	TP_PROTO(struct xfs_mount *mp, unsigned int flags),
+	TP_ARGS(mp, flags),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(unsigned int, flags)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->flags = flags;
+	),
+	TP_printk("dev %d:%d flags 0x%x",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->flags)
+);
+#define DEFINE_FS_CORRUPT_EVENT(name)	\
+DEFINE_EVENT(xfs_fs_corrupt_class, name,	\
+	TP_PROTO(struct xfs_mount *mp, unsigned int flags), \
+	TP_ARGS(mp, flags))
+DEFINE_FS_CORRUPT_EVENT(xfs_fs_mark_sick);
+DEFINE_FS_CORRUPT_EVENT(xfs_fs_mark_healthy);
+DEFINE_FS_CORRUPT_EVENT(xfs_fs_unfixed_corruption);
+DEFINE_FS_CORRUPT_EVENT(xfs_rt_mark_sick);
+DEFINE_FS_CORRUPT_EVENT(xfs_rt_mark_healthy);
+DEFINE_FS_CORRUPT_EVENT(xfs_rt_unfixed_corruption);
+
+DECLARE_EVENT_CLASS(xfs_ag_corrupt_class,
+	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, unsigned int flags),
+	TP_ARGS(mp, agno, flags),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_agnumber_t, agno)
+		__field(unsigned int, flags)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->agno = agno;
+		__entry->flags = flags;
+	),
+	TP_printk("dev %d:%d agno %u flags 0x%x",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->agno, __entry->flags)
+);
+#define DEFINE_AG_CORRUPT_EVENT(name)	\
+DEFINE_EVENT(xfs_ag_corrupt_class, name,	\
+	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno, \
+		 unsigned int flags), \
+	TP_ARGS(mp, agno, flags))
+DEFINE_AG_CORRUPT_EVENT(xfs_ag_mark_sick);
+DEFINE_AG_CORRUPT_EVENT(xfs_ag_mark_healthy);
+DEFINE_AG_CORRUPT_EVENT(xfs_ag_unfixed_corruption);
+
+DECLARE_EVENT_CLASS(xfs_inode_corrupt_class,
+	TP_PROTO(struct xfs_inode *ip, unsigned int flags),
+	TP_ARGS(ip, flags),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_ino_t, ino)
+		__field(unsigned int, flags)
+	),
+	TP_fast_assign(
+		__entry->dev = ip->i_mount->m_super->s_dev;
+		__entry->ino = ip->i_ino;
+		__entry->flags = flags;
+	),
+	TP_printk("dev %d:%d ino 0x%llx flags 0x%x",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->ino, __entry->flags)
+);
+#define DEFINE_INODE_CORRUPT_EVENT(name)	\
+DEFINE_EVENT(xfs_inode_corrupt_class, name,	\
+	TP_PROTO(struct xfs_inode *ip, unsigned int flags), \
+	TP_ARGS(ip, flags))
+DEFINE_INODE_CORRUPT_EVENT(xfs_inode_mark_sick);
+DEFINE_INODE_CORRUPT_EVENT(xfs_inode_mark_healthy);
+
+TRACE_EVENT(xfs_iwalk_ag,
+	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno,
+		 xfs_agino_t startino),
+	TP_ARGS(mp, agno, startino),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_agnumber_t, agno)
+		__field(xfs_agino_t, startino)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->agno = agno;
+		__entry->startino = startino;
+	),
+	TP_printk("dev %d:%d agno %d startino %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->agno,
+		  __entry->startino)
+)
+
+TRACE_EVENT(xfs_iwalk_ag_rec,
+	TP_PROTO(struct xfs_mount *mp, xfs_agnumber_t agno,
+		 struct xfs_inobt_rec_incore *irec),
+	TP_ARGS(mp, agno, irec),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(xfs_agnumber_t, agno)
+		__field(xfs_agino_t, startino)
+		__field(uint64_t, freemask)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->agno = agno;
+		__entry->startino = irec->ir_startino;
+		__entry->freemask = irec->ir_free;
+	),
+	TP_printk("dev %d:%d agno %d startino %u freemask 0x%llx",
+		  MAJOR(__entry->dev), MINOR(__entry->dev), __entry->agno,
+		  __entry->startino, __entry->freemask)
+)
+
+TRACE_EVENT(xfs_pwork_init,
+	TP_PROTO(struct xfs_mount *mp, unsigned int nr_threads, pid_t pid),
+	TP_ARGS(mp, nr_threads, pid),
+	TP_STRUCT__entry(
+		__field(dev_t, dev)
+		__field(unsigned int, nr_threads)
+		__field(pid_t, pid)
+	),
+	TP_fast_assign(
+		__entry->dev = mp->m_super->s_dev;
+		__entry->nr_threads = nr_threads;
+		__entry->pid = pid;
+	),
+	TP_printk("dev %d:%d nr_threads %u pid %u",
+		  MAJOR(__entry->dev), MINOR(__entry->dev),
+		  __entry->nr_threads, __entry->pid)
+)
+
 #endif /* _TRACE_XFS_H */
 
 #undef TRACE_INCLUDE_PATH
diff --git a/fs/xfs/xfs_trans.c b/fs/xfs/xfs_trans.c
index 912b42f5fe4a..d42a68d8313b 100644
--- a/fs/xfs/xfs_trans.c
+++ b/fs/xfs/xfs_trans.c
@@ -11,7 +11,6 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_inode.h"
 #include "xfs_extent_busy.h"
 #include "xfs_quota.h"
 #include "xfs_trans.h"
@@ -264,9 +263,7 @@ xfs_trans_alloc(
 	 * GFP_NOFS allocation context so that we avoid lockdep false positives
 	 * by doing GFP_KERNEL allocations inside sb_start_intwrite().
 	 */
-	tp = kmem_zone_zalloc(xfs_trans_zone,
-		(flags & XFS_TRANS_NOFS) ? KM_NOFS : KM_SLEEP);
-
+	tp = kmem_zone_zalloc(xfs_trans_zone, KM_SLEEP);
 	if (!(flags & XFS_TRANS_NO_WRITECOUNT))
 		sb_start_intwrite(mp->m_super);
 
@@ -452,7 +449,7 @@ xfs_trans_apply_sb_deltas(
 	xfs_buf_t	*bp;
 	int		whole = 0;
 
-	bp = xfs_trans_getsb(tp, tp->t_mountp, 0);
+	bp = xfs_trans_getsb(tp, tp->t_mountp);
 	sbp = XFS_BUF_TO_SBP(bp);
 
 	/*
@@ -767,10 +764,9 @@ xfs_trans_del_item(
 }
 
 /* Detach and unlock all of the items in a transaction */
-void
+static void
 xfs_trans_free_items(
 	struct xfs_trans	*tp,
-	xfs_lsn_t		commit_lsn,
 	bool			abort)
 {
 	struct xfs_log_item	*lip, *next;
@@ -779,11 +775,10 @@ xfs_trans_free_items(
 
 	list_for_each_entry_safe(lip, next, &tp->t_items, li_trans) {
 		xfs_trans_del_item(lip);
-		if (commit_lsn != NULLCOMMITLSN)
-			lip->li_ops->iop_committing(lip, commit_lsn);
 		if (abort)
 			set_bit(XFS_LI_ABORTED, &lip->li_flags);
-		lip->li_ops->iop_unlock(lip);
+		if (lip->li_ops->iop_release)
+			lip->li_ops->iop_release(lip);
 	}
 }
 
@@ -804,7 +799,8 @@ xfs_log_item_batch_insert(
 	for (i = 0; i < nr_items; i++) {
 		struct xfs_log_item *lip = log_items[i];
 
-		lip->li_ops->iop_unpin(lip, 0);
+		if (lip->li_ops->iop_unpin)
+			lip->li_ops->iop_unpin(lip, 0);
 	}
 }
 
@@ -815,7 +811,7 @@ xfs_log_item_batch_insert(
  *
  * If we are called with the aborted flag set, it is because a log write during
  * a CIL checkpoint commit has failed. In this case, all the items in the
- * checkpoint have already gone through iop_commited and iop_unlock, which
+ * checkpoint have already gone through iop_committed and iop_committing, which
  * means that checkpoint commit abort handling is treated exactly the same
  * as an iclog write error even though we haven't started any IO yet. Hence in
  * this case all we need to do is iop_committed processing, followed by an
@@ -833,7 +829,7 @@ xfs_trans_committed_bulk(
 	struct xfs_ail		*ailp,
 	struct xfs_log_vec	*log_vector,
 	xfs_lsn_t		commit_lsn,
-	int			aborted)
+	bool			aborted)
 {
 #define LOG_ITEM_BATCH_SIZE	32
 	struct xfs_log_item	*log_items[LOG_ITEM_BATCH_SIZE];
@@ -852,7 +848,16 @@ xfs_trans_committed_bulk(
 
 		if (aborted)
 			set_bit(XFS_LI_ABORTED, &lip->li_flags);
-		item_lsn = lip->li_ops->iop_committed(lip, commit_lsn);
+
+		if (lip->li_ops->flags & XFS_ITEM_RELEASE_WHEN_COMMITTED) {
+			lip->li_ops->iop_release(lip);
+			continue;
+		}
+
+		if (lip->li_ops->iop_committed)
+			item_lsn = lip->li_ops->iop_committed(lip, commit_lsn);
+		else
+			item_lsn = commit_lsn;
 
 		/* item_lsn of -1 means the item needs no further processing */
 		if (XFS_LSN_CMP(item_lsn, (xfs_lsn_t)-1) == 0)
@@ -864,7 +869,8 @@ xfs_trans_committed_bulk(
 		 */
 		if (aborted) {
 			ASSERT(XFS_FORCED_SHUTDOWN(ailp->ail_mount));
-			lip->li_ops->iop_unpin(lip, 1);
+			if (lip->li_ops->iop_unpin)
+				lip->li_ops->iop_unpin(lip, 1);
 			continue;
 		}
 
@@ -882,7 +888,8 @@ xfs_trans_committed_bulk(
 				xfs_trans_ail_update(ailp, lip, item_lsn);
 			else
 				spin_unlock(&ailp->ail_lock);
-			lip->li_ops->iop_unpin(lip, 0);
+			if (lip->li_ops->iop_unpin)
+				lip->li_ops->iop_unpin(lip, 0);
 			continue;
 		}
 
@@ -998,7 +1005,7 @@ out_unreserve:
 		tp->t_ticket = NULL;
 	}
 	current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS);
-	xfs_trans_free_items(tp, NULLCOMMITLSN, !!error);
+	xfs_trans_free_items(tp, !!error);
 	xfs_trans_free(tp);
 
 	XFS_STATS_INC(mp, xs_trans_empty);
@@ -1060,7 +1067,7 @@ xfs_trans_cancel(
 	/* mark this thread as no longer being in a transaction */
 	current_restore_flags_nested(&tp->t_pflags, PF_MEMALLOC_NOFS);
 
-	xfs_trans_free_items(tp, NULLCOMMITLSN, dirty);
+	xfs_trans_free_items(tp, dirty);
 	xfs_trans_free(tp);
 }
 
diff --git a/fs/xfs/xfs_trans.h b/fs/xfs/xfs_trans.h
index c6e1c5704a8c..64d7f171ebd3 100644
--- a/fs/xfs/xfs_trans.h
+++ b/fs/xfs/xfs_trans.h
@@ -27,7 +27,7 @@ struct xfs_cud_log_item;
 struct xfs_bui_log_item;
 struct xfs_bud_log_item;
 
-typedef struct xfs_log_item {
+struct xfs_log_item {
 	struct list_head		li_ail;		/* AIL pointers */
 	struct list_head		li_trans;	/* transaction list */
 	xfs_lsn_t			li_lsn;		/* last on-disk lsn */
@@ -48,7 +48,7 @@ typedef struct xfs_log_item {
 	struct xfs_log_vec		*li_lv;		/* active log vector */
 	struct xfs_log_vec		*li_lv_shadow;	/* standby vector */
 	xfs_lsn_t			li_seq;		/* CIL commit seq */
-} xfs_log_item_t;
+};
 
 /*
  * li_flags use the (set/test/clear)_bit atomic interfaces because updates can
@@ -67,17 +67,24 @@ typedef struct xfs_log_item {
 	{ (1 << XFS_LI_DIRTY),		"DIRTY" }
 
 struct xfs_item_ops {
-	void (*iop_size)(xfs_log_item_t *, int *, int *);
-	void (*iop_format)(xfs_log_item_t *, struct xfs_log_vec *);
-	void (*iop_pin)(xfs_log_item_t *);
-	void (*iop_unpin)(xfs_log_item_t *, int remove);
+	unsigned flags;
+	void (*iop_size)(struct xfs_log_item *, int *, int *);
+	void (*iop_format)(struct xfs_log_item *, struct xfs_log_vec *);
+	void (*iop_pin)(struct xfs_log_item *);
+	void (*iop_unpin)(struct xfs_log_item *, int remove);
 	uint (*iop_push)(struct xfs_log_item *, struct list_head *);
-	void (*iop_unlock)(xfs_log_item_t *);
-	xfs_lsn_t (*iop_committed)(xfs_log_item_t *, xfs_lsn_t);
-	void (*iop_committing)(xfs_log_item_t *, xfs_lsn_t);
-	void (*iop_error)(xfs_log_item_t *, xfs_buf_t *);
+	void (*iop_committing)(struct xfs_log_item *, xfs_lsn_t commit_lsn);
+	void (*iop_release)(struct xfs_log_item *);
+	xfs_lsn_t (*iop_committed)(struct xfs_log_item *, xfs_lsn_t);
+	void (*iop_error)(struct xfs_log_item *, xfs_buf_t *);
 };
 
+/*
+ * Release the log item as soon as committed.  This is for items just logging
+ * intents that never need to be written back in place.
+ */
+#define XFS_ITEM_RELEASE_WHEN_COMMITTED	(1 << 0)
+
 void	xfs_log_item_init(struct xfs_mount *mp, struct xfs_log_item *item,
 			  int type, const struct xfs_item_ops *ops);
 
@@ -203,7 +210,7 @@ xfs_trans_read_buf(
 				      flags, bpp, ops);
 }
 
-struct xfs_buf	*xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *, int);
+struct xfs_buf	*xfs_trans_getsb(xfs_trans_t *, struct xfs_mount *);
 
 void		xfs_trans_brelse(xfs_trans_t *, struct xfs_buf *);
 void		xfs_trans_bjoin(xfs_trans_t *, struct xfs_buf *);
@@ -223,14 +230,6 @@ void		xfs_trans_dirty_buf(struct xfs_trans *, struct xfs_buf *);
 bool		xfs_trans_buf_is_dirty(struct xfs_buf *bp);
 void		xfs_trans_log_inode(xfs_trans_t *, struct xfs_inode *, uint);
 
-struct xfs_efd_log_item	*xfs_trans_get_efd(struct xfs_trans *,
-				  struct xfs_efi_log_item *,
-				  uint);
-int		xfs_trans_free_extent(struct xfs_trans *,
-				      struct xfs_efd_log_item *, xfs_fsblock_t,
-				      xfs_extlen_t,
-				      const struct xfs_owner_info *,
-				      bool);
 int		xfs_trans_commit(struct xfs_trans *);
 int		xfs_trans_roll(struct xfs_trans **);
 int		xfs_trans_roll_inode(struct xfs_trans **, struct xfs_inode *);
@@ -245,37 +244,4 @@ void		xfs_trans_buf_copy_type(struct xfs_buf *dst_bp,
 
 extern kmem_zone_t	*xfs_trans_zone;
 
-/* rmap updates */
-enum xfs_rmap_intent_type;
-
-struct xfs_rud_log_item *xfs_trans_get_rud(struct xfs_trans *tp,
-		struct xfs_rui_log_item *ruip);
-int xfs_trans_log_finish_rmap_update(struct xfs_trans *tp,
-		struct xfs_rud_log_item *rudp, enum xfs_rmap_intent_type type,
-		uint64_t owner, int whichfork, xfs_fileoff_t startoff,
-		xfs_fsblock_t startblock, xfs_filblks_t blockcount,
-		xfs_exntst_t state, struct xfs_btree_cur **pcur);
-
-/* refcount updates */
-enum xfs_refcount_intent_type;
-
-struct xfs_cud_log_item *xfs_trans_get_cud(struct xfs_trans *tp,
-		struct xfs_cui_log_item *cuip);
-int xfs_trans_log_finish_refcount_update(struct xfs_trans *tp,
-		struct xfs_cud_log_item *cudp,
-		enum xfs_refcount_intent_type type, xfs_fsblock_t startblock,
-		xfs_extlen_t blockcount, xfs_fsblock_t *new_fsb,
-		xfs_extlen_t *new_len, struct xfs_btree_cur **pcur);
-
-/* mapping updates */
-enum xfs_bmap_intent_type;
-
-struct xfs_bud_log_item *xfs_trans_get_bud(struct xfs_trans *tp,
-		struct xfs_bui_log_item *buip);
-int xfs_trans_log_finish_bmap_update(struct xfs_trans *tp,
-		struct xfs_bud_log_item *rudp, enum xfs_bmap_intent_type type,
-		struct xfs_inode *ip, int whichfork, xfs_fileoff_t startoff,
-		xfs_fsblock_t startblock, xfs_filblks_t *blockcount,
-		xfs_exntst_t state);
-
 #endif	/* __XFS_TRANS_H__ */
diff --git a/fs/xfs/xfs_trans_ail.c b/fs/xfs/xfs_trans_ail.c
index d3a4e89bf4a0..6ccfd75d3c24 100644
--- a/fs/xfs/xfs_trans_ail.c
+++ b/fs/xfs/xfs_trans_ail.c
@@ -6,6 +6,7 @@
  */
 #include "xfs.h"
 #include "xfs_fs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
@@ -74,29 +75,29 @@ xfs_ail_check(
  * Return a pointer to the last item in the AIL.  If the AIL is empty, then
  * return NULL.
  */
-static xfs_log_item_t *
+static struct xfs_log_item *
 xfs_ail_max(
 	struct xfs_ail  *ailp)
 {
 	if (list_empty(&ailp->ail_head))
 		return NULL;
 
-	return list_entry(ailp->ail_head.prev, xfs_log_item_t, li_ail);
+	return list_entry(ailp->ail_head.prev, struct xfs_log_item, li_ail);
 }
 
 /*
  * Return a pointer to the item which follows the given item in the AIL.  If
  * the given item is the last item in the list, then return NULL.
  */
-static xfs_log_item_t *
+static struct xfs_log_item *
 xfs_ail_next(
-	struct xfs_ail  *ailp,
-	xfs_log_item_t  *lip)
+	struct xfs_ail		*ailp,
+	struct xfs_log_item	*lip)
 {
 	if (lip->li_ail.next == &ailp->ail_head)
 		return NULL;
 
-	return list_first_entry(&lip->li_ail, xfs_log_item_t, li_ail);
+	return list_first_entry(&lip->li_ail, struct xfs_log_item, li_ail);
 }
 
 /*
@@ -109,10 +110,10 @@ xfs_ail_next(
  */
 xfs_lsn_t
 xfs_ail_min_lsn(
-	struct xfs_ail	*ailp)
+	struct xfs_ail		*ailp)
 {
-	xfs_lsn_t	lsn = 0;
-	xfs_log_item_t	*lip;
+	xfs_lsn_t		lsn = 0;
+	struct xfs_log_item	*lip;
 
 	spin_lock(&ailp->ail_lock);
 	lip = xfs_ail_min(ailp);
@@ -128,10 +129,10 @@ xfs_ail_min_lsn(
  */
 static xfs_lsn_t
 xfs_ail_max_lsn(
-	struct xfs_ail  *ailp)
+	struct xfs_ail		*ailp)
 {
-	xfs_lsn_t       lsn = 0;
-	xfs_log_item_t  *lip;
+	xfs_lsn_t       	lsn = 0;
+	struct xfs_log_item	*lip;
 
 	spin_lock(&ailp->ail_lock);
 	lip = xfs_ail_max(ailp);
@@ -216,13 +217,13 @@ xfs_trans_ail_cursor_clear(
  * ascending traversal.  Pass a @lsn of zero to initialise the cursor to the
  * first item in the AIL. Returns NULL if the list is empty.
  */
-xfs_log_item_t *
+struct xfs_log_item *
 xfs_trans_ail_cursor_first(
 	struct xfs_ail		*ailp,
 	struct xfs_ail_cursor	*cur,
 	xfs_lsn_t		lsn)
 {
-	xfs_log_item_t		*lip;
+	struct xfs_log_item	*lip;
 
 	xfs_trans_ail_cursor_init(ailp, cur);
 
@@ -248,7 +249,7 @@ __xfs_trans_ail_cursor_last(
 	struct xfs_ail		*ailp,
 	xfs_lsn_t		lsn)
 {
-	xfs_log_item_t		*lip;
+	struct xfs_log_item	*lip;
 
 	list_for_each_entry_reverse(lip, &ailp->ail_head, li_ail) {
 		if (XFS_LSN_CMP(lip->li_lsn, lsn) <= 0)
@@ -327,8 +328,8 @@ xfs_ail_splice(
  */
 static void
 xfs_ail_delete(
-	struct xfs_ail  *ailp,
-	xfs_log_item_t  *lip)
+	struct xfs_ail		*ailp,
+	struct xfs_log_item	*lip)
 {
 	xfs_ail_check(ailp, lip);
 	list_del(&lip->li_ail);
@@ -347,6 +348,14 @@ xfsaild_push_item(
 	if (XFS_TEST_ERROR(false, ailp->ail_mount, XFS_ERRTAG_LOG_ITEM_PIN))
 		return XFS_ITEM_PINNED;
 
+	/*
+	 * Consider the item pinned if a push callback is not defined so the
+	 * caller will force the log. This should only happen for intent items
+	 * as they are unpinned once the associated done item is committed to
+	 * the on-disk log.
+	 */
+	if (!lip->li_ops->iop_push)
+		return XFS_ITEM_PINNED;
 	return lip->li_ops->iop_push(lip, &ailp->ail_buf_list);
 }
 
@@ -356,7 +365,7 @@ xfsaild_push(
 {
 	xfs_mount_t		*mp = ailp->ail_mount;
 	struct xfs_ail_cursor	cur;
-	xfs_log_item_t		*lip;
+	struct xfs_log_item	*lip;
 	xfs_lsn_t		lsn;
 	xfs_lsn_t		target;
 	long			tout;
@@ -611,10 +620,10 @@ xfsaild(
  */
 void
 xfs_ail_push(
-	struct xfs_ail	*ailp,
-	xfs_lsn_t	threshold_lsn)
+	struct xfs_ail		*ailp,
+	xfs_lsn_t		threshold_lsn)
 {
-	xfs_log_item_t	*lip;
+	struct xfs_log_item	*lip;
 
 	lip = xfs_ail_min(ailp);
 	if (!lip || XFS_FORCED_SHUTDOWN(ailp->ail_mount) ||
@@ -699,7 +708,7 @@ xfs_trans_ail_update_bulk(
 	int			nr_items,
 	xfs_lsn_t		lsn) __releases(ailp->ail_lock)
 {
-	xfs_log_item_t		*mlip;
+	struct xfs_log_item	*mlip;
 	int			mlip_changed = 0;
 	int			i;
 	LIST_HEAD(tmp);
diff --git a/fs/xfs/xfs_trans_bmap.c b/fs/xfs/xfs_trans_bmap.c
deleted file mode 100644
index 11cff449d055..000000000000
--- a/fs/xfs/xfs_trans_bmap.c
+++ /dev/null
@@ -1,233 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2016 Oracle.  All Rights Reserved.
- * Author: Darrick J. Wong <darrick.wong@oracle.com>
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_shared.h"
-#include "xfs_format.h"
-#include "xfs_log_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_trans.h"
-#include "xfs_trans_priv.h"
-#include "xfs_bmap_item.h"
-#include "xfs_alloc.h"
-#include "xfs_bmap.h"
-#include "xfs_inode.h"
-#include "xfs_defer.h"
-
-/*
- * This routine is called to allocate a "bmap update done"
- * log item.
- */
-struct xfs_bud_log_item *
-xfs_trans_get_bud(
-	struct xfs_trans		*tp,
-	struct xfs_bui_log_item		*buip)
-{
-	struct xfs_bud_log_item		*budp;
-
-	budp = xfs_bud_init(tp->t_mountp, buip);
-	xfs_trans_add_item(tp, &budp->bud_item);
-	return budp;
-}
-
-/*
- * Finish an bmap update and log it to the BUD. Note that the
- * transaction is marked dirty regardless of whether the bmap update
- * succeeds or fails to support the BUI/BUD lifecycle rules.
- */
-int
-xfs_trans_log_finish_bmap_update(
-	struct xfs_trans		*tp,
-	struct xfs_bud_log_item		*budp,
-	enum xfs_bmap_intent_type	type,
-	struct xfs_inode		*ip,
-	int				whichfork,
-	xfs_fileoff_t			startoff,
-	xfs_fsblock_t			startblock,
-	xfs_filblks_t			*blockcount,
-	xfs_exntst_t			state)
-{
-	int				error;
-
-	error = xfs_bmap_finish_one(tp, ip, type, whichfork, startoff,
-			startblock, blockcount, state);
-
-	/*
-	 * Mark the transaction dirty, even on error. This ensures the
-	 * transaction is aborted, which:
-	 *
-	 * 1.) releases the BUI and frees the BUD
-	 * 2.) shuts down the filesystem
-	 */
-	tp->t_flags |= XFS_TRANS_DIRTY;
-	set_bit(XFS_LI_DIRTY, &budp->bud_item.li_flags);
-
-	return error;
-}
-
-/* Sort bmap intents by inode. */
-static int
-xfs_bmap_update_diff_items(
-	void				*priv,
-	struct list_head		*a,
-	struct list_head		*b)
-{
-	struct xfs_bmap_intent		*ba;
-	struct xfs_bmap_intent		*bb;
-
-	ba = container_of(a, struct xfs_bmap_intent, bi_list);
-	bb = container_of(b, struct xfs_bmap_intent, bi_list);
-	return ba->bi_owner->i_ino - bb->bi_owner->i_ino;
-}
-
-/* Get an BUI. */
-STATIC void *
-xfs_bmap_update_create_intent(
-	struct xfs_trans		*tp,
-	unsigned int			count)
-{
-	struct xfs_bui_log_item		*buip;
-
-	ASSERT(count == XFS_BUI_MAX_FAST_EXTENTS);
-	ASSERT(tp != NULL);
-
-	buip = xfs_bui_init(tp->t_mountp);
-	ASSERT(buip != NULL);
-
-	/*
-	 * Get a log_item_desc to point at the new item.
-	 */
-	xfs_trans_add_item(tp, &buip->bui_item);
-	return buip;
-}
-
-/* Set the map extent flags for this mapping. */
-static void
-xfs_trans_set_bmap_flags(
-	struct xfs_map_extent		*bmap,
-	enum xfs_bmap_intent_type	type,
-	int				whichfork,
-	xfs_exntst_t			state)
-{
-	bmap->me_flags = 0;
-	switch (type) {
-	case XFS_BMAP_MAP:
-	case XFS_BMAP_UNMAP:
-		bmap->me_flags = type;
-		break;
-	default:
-		ASSERT(0);
-	}
-	if (state == XFS_EXT_UNWRITTEN)
-		bmap->me_flags |= XFS_BMAP_EXTENT_UNWRITTEN;
-	if (whichfork == XFS_ATTR_FORK)
-		bmap->me_flags |= XFS_BMAP_EXTENT_ATTR_FORK;
-}
-
-/* Log bmap updates in the intent item. */
-STATIC void
-xfs_bmap_update_log_item(
-	struct xfs_trans		*tp,
-	void				*intent,
-	struct list_head		*item)
-{
-	struct xfs_bui_log_item		*buip = intent;
-	struct xfs_bmap_intent		*bmap;
-	uint				next_extent;
-	struct xfs_map_extent		*map;
-
-	bmap = container_of(item, struct xfs_bmap_intent, bi_list);
-
-	tp->t_flags |= XFS_TRANS_DIRTY;
-	set_bit(XFS_LI_DIRTY, &buip->bui_item.li_flags);
-
-	/*
-	 * atomic_inc_return gives us the value after the increment;
-	 * we want to use it as an array index so we need to subtract 1 from
-	 * it.
-	 */
-	next_extent = atomic_inc_return(&buip->bui_next_extent) - 1;
-	ASSERT(next_extent < buip->bui_format.bui_nextents);
-	map = &buip->bui_format.bui_extents[next_extent];
-	map->me_owner = bmap->bi_owner->i_ino;
-	map->me_startblock = bmap->bi_bmap.br_startblock;
-	map->me_startoff = bmap->bi_bmap.br_startoff;
-	map->me_len = bmap->bi_bmap.br_blockcount;
-	xfs_trans_set_bmap_flags(map, bmap->bi_type, bmap->bi_whichfork,
-			bmap->bi_bmap.br_state);
-}
-
-/* Get an BUD so we can process all the deferred rmap updates. */
-STATIC void *
-xfs_bmap_update_create_done(
-	struct xfs_trans		*tp,
-	void				*intent,
-	unsigned int			count)
-{
-	return xfs_trans_get_bud(tp, intent);
-}
-
-/* Process a deferred rmap update. */
-STATIC int
-xfs_bmap_update_finish_item(
-	struct xfs_trans		*tp,
-	struct list_head		*item,
-	void				*done_item,
-	void				**state)
-{
-	struct xfs_bmap_intent		*bmap;
-	xfs_filblks_t			count;
-	int				error;
-
-	bmap = container_of(item, struct xfs_bmap_intent, bi_list);
-	count = bmap->bi_bmap.br_blockcount;
-	error = xfs_trans_log_finish_bmap_update(tp, done_item,
-			bmap->bi_type,
-			bmap->bi_owner, bmap->bi_whichfork,
-			bmap->bi_bmap.br_startoff,
-			bmap->bi_bmap.br_startblock,
-			&count,
-			bmap->bi_bmap.br_state);
-	if (!error && count > 0) {
-		ASSERT(bmap->bi_type == XFS_BMAP_UNMAP);
-		bmap->bi_bmap.br_blockcount = count;
-		return -EAGAIN;
-	}
-	kmem_free(bmap);
-	return error;
-}
-
-/* Abort all pending BUIs. */
-STATIC void
-xfs_bmap_update_abort_intent(
-	void				*intent)
-{
-	xfs_bui_release(intent);
-}
-
-/* Cancel a deferred rmap update. */
-STATIC void
-xfs_bmap_update_cancel_item(
-	struct list_head		*item)
-{
-	struct xfs_bmap_intent		*bmap;
-
-	bmap = container_of(item, struct xfs_bmap_intent, bi_list);
-	kmem_free(bmap);
-}
-
-const struct xfs_defer_op_type xfs_bmap_update_defer_type = {
-	.max_items	= XFS_BUI_MAX_FAST_EXTENTS,
-	.diff_items	= xfs_bmap_update_diff_items,
-	.create_intent	= xfs_bmap_update_create_intent,
-	.abort_intent	= xfs_bmap_update_abort_intent,
-	.log_item	= xfs_bmap_update_log_item,
-	.create_done	= xfs_bmap_update_create_done,
-	.finish_item	= xfs_bmap_update_finish_item,
-	.cancel_item	= xfs_bmap_update_cancel_item,
-};
diff --git a/fs/xfs/xfs_trans_buf.c b/fs/xfs/xfs_trans_buf.c
index 629f1479c9d2..b5b3a78ef31c 100644
--- a/fs/xfs/xfs_trans_buf.c
+++ b/fs/xfs/xfs_trans_buf.c
@@ -10,11 +10,9 @@
 #include "xfs_log_format.h"
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
-#include "xfs_inode.h"
 #include "xfs_trans.h"
 #include "xfs_buf_item.h"
 #include "xfs_trans_priv.h"
-#include "xfs_error.h"
 #include "xfs_trace.h"
 
 /*
@@ -174,8 +172,7 @@ xfs_trans_get_buf_map(
 xfs_buf_t *
 xfs_trans_getsb(
 	xfs_trans_t		*tp,
-	struct xfs_mount	*mp,
-	int			flags)
+	struct xfs_mount	*mp)
 {
 	xfs_buf_t		*bp;
 	struct xfs_buf_log_item	*bip;
@@ -185,7 +182,7 @@ xfs_trans_getsb(
 	 * if tp is NULL.
 	 */
 	if (tp == NULL)
-		return xfs_getsb(mp, flags);
+		return xfs_getsb(mp);
 
 	/*
 	 * If the superblock buffer already has this transaction
@@ -203,7 +200,7 @@ xfs_trans_getsb(
 		return bp;
 	}
 
-	bp = xfs_getsb(mp, flags);
+	bp = xfs_getsb(mp);
 	if (bp == NULL)
 		return NULL;
 
@@ -277,7 +274,7 @@ xfs_trans_read_buf_map(
 		 * release this buffer when it kills the tranaction.
 		 */
 		ASSERT(bp->b_ops != NULL);
-		error = xfs_buf_ensure_ops(bp, ops);
+		error = xfs_buf_reverify(bp, ops);
 		if (error) {
 			xfs_buf_ioerror_alert(bp, __func__);
 
@@ -428,7 +425,7 @@ xfs_trans_brelse(
 
 /*
  * Mark the buffer as not needing to be unlocked when the buf item's
- * iop_unlock() routine is called.  The buffer must already be locked
+ * iop_committing() routine is called.  The buffer must already be locked
  * and associated with the given transaction.
  */
 /* ARGSUSED */
diff --git a/fs/xfs/xfs_trans_dquot.c b/fs/xfs/xfs_trans_dquot.c
index c23257a26c2b..1027c9ca6eb8 100644
--- a/fs/xfs/xfs_trans_dquot.c
+++ b/fs/xfs/xfs_trans_dquot.c
@@ -11,7 +11,6 @@
 #include "xfs_trans_resv.h"
 #include "xfs_mount.h"
 #include "xfs_inode.h"
-#include "xfs_error.h"
 #include "xfs_trans.h"
 #include "xfs_trans_priv.h"
 #include "xfs_quota.h"
@@ -29,7 +28,6 @@ xfs_trans_dqjoin(
 	xfs_trans_t	*tp,
 	xfs_dquot_t	*dqp)
 {
-	ASSERT(dqp->q_transp != tp);
 	ASSERT(XFS_DQ_IS_LOCKED(dqp));
 	ASSERT(dqp->q_logitem.qli_dquot == dqp);
 
@@ -37,15 +35,8 @@ xfs_trans_dqjoin(
 	 * Get a log_item_desc to point at the new item.
 	 */
 	xfs_trans_add_item(tp, &dqp->q_logitem.qli_item);
-
-	/*
-	 * Initialize d_transp so we can later determine if this dquot is
-	 * associated with this transaction.
-	 */
-	dqp->q_transp = tp;
 }
 
-
 /*
  * This is called to mark the dquot as needing
  * to be logged when the transaction is committed.  The dquot must
@@ -61,7 +52,6 @@ xfs_trans_log_dquot(
 	xfs_trans_t	*tp,
 	xfs_dquot_t	*dqp)
 {
-	ASSERT(dqp->q_transp == tp);
 	ASSERT(XFS_DQ_IS_LOCKED(dqp));
 
 	tp->t_flags |= XFS_TRANS_DIRTY;
@@ -74,13 +64,13 @@ xfs_trans_log_dquot(
  */
 void
 xfs_trans_dup_dqinfo(
-	xfs_trans_t	*otp,
-	xfs_trans_t	*ntp)
+	struct xfs_trans	*otp,
+	struct xfs_trans	*ntp)
 {
-	xfs_dqtrx_t	*oq, *nq;
-	int		i, j;
-	xfs_dqtrx_t	*oqa, *nqa;
-	ulong		blk_res_used;
+	struct xfs_dqtrx	*oq, *nq;
+	int			i, j;
+	struct xfs_dqtrx	*oqa, *nqa;
+	uint64_t		blk_res_used;
 
 	if (!otp->t_dqinfo)
 		return;
@@ -137,7 +127,7 @@ xfs_trans_mod_dquot_byino(
 	xfs_trans_t	*tp,
 	xfs_inode_t	*ip,
 	uint		field,
-	long		delta)
+	int64_t		delta)
 {
 	xfs_mount_t	*mp = tp->t_mountp;
 
@@ -191,12 +181,12 @@ xfs_trans_get_dqtrx(
  */
 void
 xfs_trans_mod_dquot(
-	xfs_trans_t	*tp,
-	xfs_dquot_t	*dqp,
-	uint		field,
-	long		delta)
+	struct xfs_trans	*tp,
+	struct xfs_dquot	*dqp,
+	uint			field,
+	int64_t			delta)
 {
-	xfs_dqtrx_t	*qtrx;
+	struct xfs_dqtrx	*qtrx;
 
 	ASSERT(tp);
 	ASSERT(XFS_IS_QUOTA_RUNNING(tp->t_mountp));
@@ -219,14 +209,14 @@ xfs_trans_mod_dquot(
 		 * regular disk blk reservation
 		 */
 	      case XFS_TRANS_DQ_RES_BLKS:
-		qtrx->qt_blk_res += (ulong)delta;
+		qtrx->qt_blk_res += delta;
 		break;
 
 		/*
 		 * inode reservation
 		 */
 	      case XFS_TRANS_DQ_RES_INOS:
-		qtrx->qt_ino_res += (ulong)delta;
+		qtrx->qt_ino_res += delta;
 		break;
 
 		/*
@@ -245,7 +235,7 @@ xfs_trans_mod_dquot(
 		 */
 	      case XFS_TRANS_DQ_ICOUNT:
 		if (qtrx->qt_ino_res && delta > 0) {
-			qtrx->qt_ino_res_used += (ulong)delta;
+			qtrx->qt_ino_res_used += delta;
 			ASSERT(qtrx->qt_ino_res >= qtrx->qt_ino_res_used);
 		}
 		qtrx->qt_icount_delta += delta;
@@ -255,7 +245,7 @@ xfs_trans_mod_dquot(
 		 * rtblk reservation
 		 */
 	      case XFS_TRANS_DQ_RES_RTBLKS:
-		qtrx->qt_rtblk_res += (ulong)delta;
+		qtrx->qt_rtblk_res += delta;
 		break;
 
 		/*
@@ -263,7 +253,7 @@ xfs_trans_mod_dquot(
 		 */
 	      case XFS_TRANS_DQ_RTBCOUNT:
 		if (qtrx->qt_rtblk_res && delta > 0) {
-			qtrx->qt_rtblk_res_used += (ulong)delta;
+			qtrx->qt_rtblk_res_used += delta;
 			ASSERT(qtrx->qt_rtblk_res >= qtrx->qt_rtblk_res_used);
 		}
 		qtrx->qt_rtbcount_delta += delta;
@@ -288,8 +278,8 @@ xfs_trans_mod_dquot(
  */
 STATIC void
 xfs_trans_dqlockedjoin(
-	xfs_trans_t	*tp,
-	xfs_dqtrx_t	*q)
+	struct xfs_trans	*tp,
+	struct xfs_dqtrx	*q)
 {
 	ASSERT(q[0].qt_dquot != NULL);
 	if (q[1].qt_dquot == NULL) {
@@ -320,8 +310,8 @@ xfs_trans_apply_dquot_deltas(
 	struct xfs_dquot	*dqp;
 	struct xfs_dqtrx	*qtrx, *qa;
 	struct xfs_disk_dquot	*d;
-	long			totalbdelta;
-	long			totalrtbdelta;
+	int64_t			totalbdelta;
+	int64_t			totalrtbdelta;
 
 	if (!(tp->t_flags & XFS_TRANS_DQ_DIRTY))
 		return;
@@ -347,7 +337,6 @@ xfs_trans_apply_dquot_deltas(
 				break;
 
 			ASSERT(XFS_DQ_IS_LOCKED(dqp));
-			ASSERT(dqp->q_transp == tp);
 
 			/*
 			 * adjust the actual number of blocks used
@@ -413,7 +402,7 @@ xfs_trans_apply_dquot_deltas(
 			 * reservation that a transaction structure knows of.
 			 */
 			if (qtrx->qt_blk_res != 0) {
-				ulong blk_res_used = 0;
+				uint64_t	blk_res_used = 0;
 
 				if (qtrx->qt_bcount_delta > 0)
 					blk_res_used = qtrx->qt_bcount_delta;
@@ -501,7 +490,7 @@ xfs_trans_unreserve_and_mod_dquots(
 {
 	int			i, j;
 	xfs_dquot_t		*dqp;
-	xfs_dqtrx_t		*qtrx, *qa;
+	struct xfs_dqtrx	*qtrx, *qa;
 	bool                    locked;
 
 	if (!tp->t_dqinfo || !(tp->t_flags & XFS_TRANS_DQ_DIRTY))
@@ -585,7 +574,7 @@ xfs_trans_dqresv(
 	xfs_trans_t	*tp,
 	xfs_mount_t	*mp,
 	xfs_dquot_t	*dqp,
-	long		nblks,
+	int64_t		nblks,
 	long		ninos,
 	uint		flags)
 {
@@ -745,7 +734,7 @@ xfs_trans_reserve_quota_bydquots(
 	struct xfs_dquot	*udqp,
 	struct xfs_dquot	*gdqp,
 	struct xfs_dquot	*pdqp,
-	long			nblks,
+	int64_t			nblks,
 	long			ninos,
 	uint			flags)
 {
@@ -804,7 +793,7 @@ int
 xfs_trans_reserve_quota_nblks(
 	struct xfs_trans	*tp,
 	struct xfs_inode	*ip,
-	long			nblks,
+	int64_t			nblks,
 	long			ninos,
 	uint			flags)
 {
diff --git a/fs/xfs/xfs_trans_extfree.c b/fs/xfs/xfs_trans_extfree.c
deleted file mode 100644
index 0710434eb240..000000000000
--- a/fs/xfs/xfs_trans_extfree.c
+++ /dev/null
@@ -1,287 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Copyright (c) 2000,2005 Silicon Graphics, Inc.
- * All Rights Reserved.
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_shared.h"
-#include "xfs_format.h"
-#include "xfs_log_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_bit.h"
-#include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_trans.h"
-#include "xfs_trans_priv.h"
-#include "xfs_extfree_item.h"
-#include "xfs_alloc.h"
-#include "xfs_bmap.h"
-#include "xfs_trace.h"
-#include "xfs_defer.h"
-
-/*
- * This routine is called to allocate an "extent free done"
- * log item that will hold nextents worth of extents.  The
- * caller must use all nextents extents, because we are not
- * flexible about this at all.
- */
-struct xfs_efd_log_item *
-xfs_trans_get_efd(struct xfs_trans		*tp,
-		  struct xfs_efi_log_item	*efip,
-		  uint				nextents)
-{
-	struct xfs_efd_log_item			*efdp;
-
-	ASSERT(tp != NULL);
-	ASSERT(nextents > 0);
-
-	efdp = xfs_efd_init(tp->t_mountp, efip, nextents);
-	ASSERT(efdp != NULL);
-
-	/*
-	 * Get a log_item_desc to point at the new item.
-	 */
-	xfs_trans_add_item(tp, &efdp->efd_item);
-	return efdp;
-}
-
-/*
- * Free an extent and log it to the EFD. Note that the transaction is marked
- * dirty regardless of whether the extent free succeeds or fails to support the
- * EFI/EFD lifecycle rules.
- */
-int
-xfs_trans_free_extent(
-	struct xfs_trans		*tp,
-	struct xfs_efd_log_item		*efdp,
-	xfs_fsblock_t			start_block,
-	xfs_extlen_t			ext_len,
-	const struct xfs_owner_info	*oinfo,
-	bool				skip_discard)
-{
-	struct xfs_mount		*mp = tp->t_mountp;
-	struct xfs_extent		*extp;
-	uint				next_extent;
-	xfs_agnumber_t			agno = XFS_FSB_TO_AGNO(mp, start_block);
-	xfs_agblock_t			agbno = XFS_FSB_TO_AGBNO(mp,
-								start_block);
-	int				error;
-
-	trace_xfs_bmap_free_deferred(tp->t_mountp, agno, 0, agbno, ext_len);
-
-	error = __xfs_free_extent(tp, start_block, ext_len,
-				  oinfo, XFS_AG_RESV_NONE, skip_discard);
-	/*
-	 * Mark the transaction dirty, even on error. This ensures the
-	 * transaction is aborted, which:
-	 *
-	 * 1.) releases the EFI and frees the EFD
-	 * 2.) shuts down the filesystem
-	 */
-	tp->t_flags |= XFS_TRANS_DIRTY;
-	set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
-
-	next_extent = efdp->efd_next_extent;
-	ASSERT(next_extent < efdp->efd_format.efd_nextents);
-	extp = &(efdp->efd_format.efd_extents[next_extent]);
-	extp->ext_start = start_block;
-	extp->ext_len = ext_len;
-	efdp->efd_next_extent++;
-
-	return error;
-}
-
-/* Sort bmap items by AG. */
-static int
-xfs_extent_free_diff_items(
-	void				*priv,
-	struct list_head		*a,
-	struct list_head		*b)
-{
-	struct xfs_mount		*mp = priv;
-	struct xfs_extent_free_item	*ra;
-	struct xfs_extent_free_item	*rb;
-
-	ra = container_of(a, struct xfs_extent_free_item, xefi_list);
-	rb = container_of(b, struct xfs_extent_free_item, xefi_list);
-	return  XFS_FSB_TO_AGNO(mp, ra->xefi_startblock) -
-		XFS_FSB_TO_AGNO(mp, rb->xefi_startblock);
-}
-
-/* Get an EFI. */
-STATIC void *
-xfs_extent_free_create_intent(
-	struct xfs_trans		*tp,
-	unsigned int			count)
-{
-	struct xfs_efi_log_item		*efip;
-
-	ASSERT(tp != NULL);
-	ASSERT(count > 0);
-
-	efip = xfs_efi_init(tp->t_mountp, count);
-	ASSERT(efip != NULL);
-
-	/*
-	 * Get a log_item_desc to point at the new item.
-	 */
-	xfs_trans_add_item(tp, &efip->efi_item);
-	return efip;
-}
-
-/* Log a free extent to the intent item. */
-STATIC void
-xfs_extent_free_log_item(
-	struct xfs_trans		*tp,
-	void				*intent,
-	struct list_head		*item)
-{
-	struct xfs_efi_log_item		*efip = intent;
-	struct xfs_extent_free_item	*free;
-	uint				next_extent;
-	struct xfs_extent		*extp;
-
-	free = container_of(item, struct xfs_extent_free_item, xefi_list);
-
-	tp->t_flags |= XFS_TRANS_DIRTY;
-	set_bit(XFS_LI_DIRTY, &efip->efi_item.li_flags);
-
-	/*
-	 * atomic_inc_return gives us the value after the increment;
-	 * we want to use it as an array index so we need to subtract 1 from
-	 * it.
-	 */
-	next_extent = atomic_inc_return(&efip->efi_next_extent) - 1;
-	ASSERT(next_extent < efip->efi_format.efi_nextents);
-	extp = &efip->efi_format.efi_extents[next_extent];
-	extp->ext_start = free->xefi_startblock;
-	extp->ext_len = free->xefi_blockcount;
-}
-
-/* Get an EFD so we can process all the free extents. */
-STATIC void *
-xfs_extent_free_create_done(
-	struct xfs_trans		*tp,
-	void				*intent,
-	unsigned int			count)
-{
-	return xfs_trans_get_efd(tp, intent, count);
-}
-
-/* Process a free extent. */
-STATIC int
-xfs_extent_free_finish_item(
-	struct xfs_trans		*tp,
-	struct list_head		*item,
-	void				*done_item,
-	void				**state)
-{
-	struct xfs_extent_free_item	*free;
-	int				error;
-
-	free = container_of(item, struct xfs_extent_free_item, xefi_list);
-	error = xfs_trans_free_extent(tp, done_item,
-			free->xefi_startblock,
-			free->xefi_blockcount,
-			&free->xefi_oinfo, free->xefi_skip_discard);
-	kmem_free(free);
-	return error;
-}
-
-/* Abort all pending EFIs. */
-STATIC void
-xfs_extent_free_abort_intent(
-	void				*intent)
-{
-	xfs_efi_release(intent);
-}
-
-/* Cancel a free extent. */
-STATIC void
-xfs_extent_free_cancel_item(
-	struct list_head		*item)
-{
-	struct xfs_extent_free_item	*free;
-
-	free = container_of(item, struct xfs_extent_free_item, xefi_list);
-	kmem_free(free);
-}
-
-const struct xfs_defer_op_type xfs_extent_free_defer_type = {
-	.max_items	= XFS_EFI_MAX_FAST_EXTENTS,
-	.diff_items	= xfs_extent_free_diff_items,
-	.create_intent	= xfs_extent_free_create_intent,
-	.abort_intent	= xfs_extent_free_abort_intent,
-	.log_item	= xfs_extent_free_log_item,
-	.create_done	= xfs_extent_free_create_done,
-	.finish_item	= xfs_extent_free_finish_item,
-	.cancel_item	= xfs_extent_free_cancel_item,
-};
-
-/*
- * AGFL blocks are accounted differently in the reserve pools and are not
- * inserted into the busy extent list.
- */
-STATIC int
-xfs_agfl_free_finish_item(
-	struct xfs_trans		*tp,
-	struct list_head		*item,
-	void				*done_item,
-	void				**state)
-{
-	struct xfs_mount		*mp = tp->t_mountp;
-	struct xfs_efd_log_item		*efdp = done_item;
-	struct xfs_extent_free_item	*free;
-	struct xfs_extent		*extp;
-	struct xfs_buf			*agbp;
-	int				error;
-	xfs_agnumber_t			agno;
-	xfs_agblock_t			agbno;
-	uint				next_extent;
-
-	free = container_of(item, struct xfs_extent_free_item, xefi_list);
-	ASSERT(free->xefi_blockcount == 1);
-	agno = XFS_FSB_TO_AGNO(mp, free->xefi_startblock);
-	agbno = XFS_FSB_TO_AGBNO(mp, free->xefi_startblock);
-
-	trace_xfs_agfl_free_deferred(mp, agno, 0, agbno, free->xefi_blockcount);
-
-	error = xfs_alloc_read_agf(mp, tp, agno, 0, &agbp);
-	if (!error)
-		error = xfs_free_agfl_block(tp, agno, agbno, agbp,
-					    &free->xefi_oinfo);
-
-	/*
-	 * Mark the transaction dirty, even on error. This ensures the
-	 * transaction is aborted, which:
-	 *
-	 * 1.) releases the EFI and frees the EFD
-	 * 2.) shuts down the filesystem
-	 */
-	tp->t_flags |= XFS_TRANS_DIRTY;
-	set_bit(XFS_LI_DIRTY, &efdp->efd_item.li_flags);
-
-	next_extent = efdp->efd_next_extent;
-	ASSERT(next_extent < efdp->efd_format.efd_nextents);
-	extp = &(efdp->efd_format.efd_extents[next_extent]);
-	extp->ext_start = free->xefi_startblock;
-	extp->ext_len = free->xefi_blockcount;
-	efdp->efd_next_extent++;
-
-	kmem_free(free);
-	return error;
-}
-
-
-/* sub-type with special handling for AGFL deferred frees */
-const struct xfs_defer_op_type xfs_agfl_free_defer_type = {
-	.max_items	= XFS_EFI_MAX_FAST_EXTENTS,
-	.diff_items	= xfs_extent_free_diff_items,
-	.create_intent	= xfs_extent_free_create_intent,
-	.abort_intent	= xfs_extent_free_abort_intent,
-	.log_item	= xfs_extent_free_log_item,
-	.create_done	= xfs_extent_free_create_done,
-	.finish_item	= xfs_agfl_free_finish_item,
-	.cancel_item	= xfs_extent_free_cancel_item,
-};
diff --git a/fs/xfs/xfs_trans_inode.c b/fs/xfs/xfs_trans_inode.c
index 542927321a61..93d14e47269d 100644
--- a/fs/xfs/xfs_trans_inode.c
+++ b/fs/xfs/xfs_trans_inode.c
@@ -8,13 +8,10 @@
 #include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_mount.h"
 #include "xfs_inode.h"
 #include "xfs_trans.h"
 #include "xfs_trans_priv.h"
 #include "xfs_inode_item.h"
-#include "xfs_trace.h"
 
 #include <linux/iversion.h>
 
diff --git a/fs/xfs/xfs_trans_priv.h b/fs/xfs/xfs_trans_priv.h
index 091eae9f4e74..2e073c1c4614 100644
--- a/fs/xfs/xfs_trans_priv.h
+++ b/fs/xfs/xfs_trans_priv.h
@@ -16,12 +16,10 @@ struct xfs_log_vec;
 void	xfs_trans_init(struct xfs_mount *);
 void	xfs_trans_add_item(struct xfs_trans *, struct xfs_log_item *);
 void	xfs_trans_del_item(struct xfs_log_item *);
-void	xfs_trans_free_items(struct xfs_trans *tp, xfs_lsn_t commit_lsn,
-				bool abort);
 void	xfs_trans_unreserve_and_mod_sb(struct xfs_trans *tp);
 
 void	xfs_trans_committed_bulk(struct xfs_ail *ailp, struct xfs_log_vec *lv,
-				xfs_lsn_t commit_lsn, int aborted);
+				xfs_lsn_t commit_lsn, bool aborted);
 /*
  * AIL traversal cursor.
  *
diff --git a/fs/xfs/xfs_trans_refcount.c b/fs/xfs/xfs_trans_refcount.c
deleted file mode 100644
index 6c947ff4faf6..000000000000
--- a/fs/xfs/xfs_trans_refcount.c
+++ /dev/null
@@ -1,241 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2016 Oracle.  All Rights Reserved.
- * Author: Darrick J. Wong <darrick.wong@oracle.com>
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_shared.h"
-#include "xfs_format.h"
-#include "xfs_log_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_trans.h"
-#include "xfs_trans_priv.h"
-#include "xfs_refcount_item.h"
-#include "xfs_alloc.h"
-#include "xfs_refcount.h"
-#include "xfs_defer.h"
-
-/*
- * This routine is called to allocate a "refcount update done"
- * log item.
- */
-struct xfs_cud_log_item *
-xfs_trans_get_cud(
-	struct xfs_trans		*tp,
-	struct xfs_cui_log_item		*cuip)
-{
-	struct xfs_cud_log_item		*cudp;
-
-	cudp = xfs_cud_init(tp->t_mountp, cuip);
-	xfs_trans_add_item(tp, &cudp->cud_item);
-	return cudp;
-}
-
-/*
- * Finish an refcount update and log it to the CUD. Note that the
- * transaction is marked dirty regardless of whether the refcount
- * update succeeds or fails to support the CUI/CUD lifecycle rules.
- */
-int
-xfs_trans_log_finish_refcount_update(
-	struct xfs_trans		*tp,
-	struct xfs_cud_log_item		*cudp,
-	enum xfs_refcount_intent_type	type,
-	xfs_fsblock_t			startblock,
-	xfs_extlen_t			blockcount,
-	xfs_fsblock_t			*new_fsb,
-	xfs_extlen_t			*new_len,
-	struct xfs_btree_cur		**pcur)
-{
-	int				error;
-
-	error = xfs_refcount_finish_one(tp, type, startblock,
-			blockcount, new_fsb, new_len, pcur);
-
-	/*
-	 * Mark the transaction dirty, even on error. This ensures the
-	 * transaction is aborted, which:
-	 *
-	 * 1.) releases the CUI and frees the CUD
-	 * 2.) shuts down the filesystem
-	 */
-	tp->t_flags |= XFS_TRANS_DIRTY;
-	set_bit(XFS_LI_DIRTY, &cudp->cud_item.li_flags);
-
-	return error;
-}
-
-/* Sort refcount intents by AG. */
-static int
-xfs_refcount_update_diff_items(
-	void				*priv,
-	struct list_head		*a,
-	struct list_head		*b)
-{
-	struct xfs_mount		*mp = priv;
-	struct xfs_refcount_intent	*ra;
-	struct xfs_refcount_intent	*rb;
-
-	ra = container_of(a, struct xfs_refcount_intent, ri_list);
-	rb = container_of(b, struct xfs_refcount_intent, ri_list);
-	return  XFS_FSB_TO_AGNO(mp, ra->ri_startblock) -
-		XFS_FSB_TO_AGNO(mp, rb->ri_startblock);
-}
-
-/* Get an CUI. */
-STATIC void *
-xfs_refcount_update_create_intent(
-	struct xfs_trans		*tp,
-	unsigned int			count)
-{
-	struct xfs_cui_log_item		*cuip;
-
-	ASSERT(tp != NULL);
-	ASSERT(count > 0);
-
-	cuip = xfs_cui_init(tp->t_mountp, count);
-	ASSERT(cuip != NULL);
-
-	/*
-	 * Get a log_item_desc to point at the new item.
-	 */
-	xfs_trans_add_item(tp, &cuip->cui_item);
-	return cuip;
-}
-
-/* Set the phys extent flags for this reverse mapping. */
-static void
-xfs_trans_set_refcount_flags(
-	struct xfs_phys_extent		*refc,
-	enum xfs_refcount_intent_type	type)
-{
-	refc->pe_flags = 0;
-	switch (type) {
-	case XFS_REFCOUNT_INCREASE:
-	case XFS_REFCOUNT_DECREASE:
-	case XFS_REFCOUNT_ALLOC_COW:
-	case XFS_REFCOUNT_FREE_COW:
-		refc->pe_flags |= type;
-		break;
-	default:
-		ASSERT(0);
-	}
-}
-
-/* Log refcount updates in the intent item. */
-STATIC void
-xfs_refcount_update_log_item(
-	struct xfs_trans		*tp,
-	void				*intent,
-	struct list_head		*item)
-{
-	struct xfs_cui_log_item		*cuip = intent;
-	struct xfs_refcount_intent	*refc;
-	uint				next_extent;
-	struct xfs_phys_extent		*ext;
-
-	refc = container_of(item, struct xfs_refcount_intent, ri_list);
-
-	tp->t_flags |= XFS_TRANS_DIRTY;
-	set_bit(XFS_LI_DIRTY, &cuip->cui_item.li_flags);
-
-	/*
-	 * atomic_inc_return gives us the value after the increment;
-	 * we want to use it as an array index so we need to subtract 1 from
-	 * it.
-	 */
-	next_extent = atomic_inc_return(&cuip->cui_next_extent) - 1;
-	ASSERT(next_extent < cuip->cui_format.cui_nextents);
-	ext = &cuip->cui_format.cui_extents[next_extent];
-	ext->pe_startblock = refc->ri_startblock;
-	ext->pe_len = refc->ri_blockcount;
-	xfs_trans_set_refcount_flags(ext, refc->ri_type);
-}
-
-/* Get an CUD so we can process all the deferred refcount updates. */
-STATIC void *
-xfs_refcount_update_create_done(
-	struct xfs_trans		*tp,
-	void				*intent,
-	unsigned int			count)
-{
-	return xfs_trans_get_cud(tp, intent);
-}
-
-/* Process a deferred refcount update. */
-STATIC int
-xfs_refcount_update_finish_item(
-	struct xfs_trans		*tp,
-	struct list_head		*item,
-	void				*done_item,
-	void				**state)
-{
-	struct xfs_refcount_intent	*refc;
-	xfs_fsblock_t			new_fsb;
-	xfs_extlen_t			new_aglen;
-	int				error;
-
-	refc = container_of(item, struct xfs_refcount_intent, ri_list);
-	error = xfs_trans_log_finish_refcount_update(tp, done_item,
-			refc->ri_type,
-			refc->ri_startblock,
-			refc->ri_blockcount,
-			&new_fsb, &new_aglen,
-			(struct xfs_btree_cur **)state);
-	/* Did we run out of reservation?  Requeue what we didn't finish. */
-	if (!error && new_aglen > 0) {
-		ASSERT(refc->ri_type == XFS_REFCOUNT_INCREASE ||
-		       refc->ri_type == XFS_REFCOUNT_DECREASE);
-		refc->ri_startblock = new_fsb;
-		refc->ri_blockcount = new_aglen;
-		return -EAGAIN;
-	}
-	kmem_free(refc);
-	return error;
-}
-
-/* Clean up after processing deferred refcounts. */
-STATIC void
-xfs_refcount_update_finish_cleanup(
-	struct xfs_trans	*tp,
-	void			*state,
-	int			error)
-{
-	struct xfs_btree_cur	*rcur = state;
-
-	xfs_refcount_finish_one_cleanup(tp, rcur, error);
-}
-
-/* Abort all pending CUIs. */
-STATIC void
-xfs_refcount_update_abort_intent(
-	void				*intent)
-{
-	xfs_cui_release(intent);
-}
-
-/* Cancel a deferred refcount update. */
-STATIC void
-xfs_refcount_update_cancel_item(
-	struct list_head		*item)
-{
-	struct xfs_refcount_intent	*refc;
-
-	refc = container_of(item, struct xfs_refcount_intent, ri_list);
-	kmem_free(refc);
-}
-
-const struct xfs_defer_op_type xfs_refcount_update_defer_type = {
-	.max_items	= XFS_CUI_MAX_FAST_EXTENTS,
-	.diff_items	= xfs_refcount_update_diff_items,
-	.create_intent	= xfs_refcount_update_create_intent,
-	.abort_intent	= xfs_refcount_update_abort_intent,
-	.log_item	= xfs_refcount_update_log_item,
-	.create_done	= xfs_refcount_update_create_done,
-	.finish_item	= xfs_refcount_update_finish_item,
-	.finish_cleanup = xfs_refcount_update_finish_cleanup,
-	.cancel_item	= xfs_refcount_update_cancel_item,
-};
diff --git a/fs/xfs/xfs_trans_rmap.c b/fs/xfs/xfs_trans_rmap.c
deleted file mode 100644
index a42890931ecd..000000000000
--- a/fs/xfs/xfs_trans_rmap.c
+++ /dev/null
@@ -1,258 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0+
-/*
- * Copyright (C) 2016 Oracle.  All Rights Reserved.
- * Author: Darrick J. Wong <darrick.wong@oracle.com>
- */
-#include "xfs.h"
-#include "xfs_fs.h"
-#include "xfs_shared.h"
-#include "xfs_format.h"
-#include "xfs_log_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_mount.h"
-#include "xfs_defer.h"
-#include "xfs_trans.h"
-#include "xfs_trans_priv.h"
-#include "xfs_rmap_item.h"
-#include "xfs_alloc.h"
-#include "xfs_rmap.h"
-#include "xfs_defer.h"
-
-/* Set the map extent flags for this reverse mapping. */
-static void
-xfs_trans_set_rmap_flags(
-	struct xfs_map_extent		*rmap,
-	enum xfs_rmap_intent_type	type,
-	int				whichfork,
-	xfs_exntst_t			state)
-{
-	rmap->me_flags = 0;
-	if (state == XFS_EXT_UNWRITTEN)
-		rmap->me_flags |= XFS_RMAP_EXTENT_UNWRITTEN;
-	if (whichfork == XFS_ATTR_FORK)
-		rmap->me_flags |= XFS_RMAP_EXTENT_ATTR_FORK;
-	switch (type) {
-	case XFS_RMAP_MAP:
-		rmap->me_flags |= XFS_RMAP_EXTENT_MAP;
-		break;
-	case XFS_RMAP_MAP_SHARED:
-		rmap->me_flags |= XFS_RMAP_EXTENT_MAP_SHARED;
-		break;
-	case XFS_RMAP_UNMAP:
-		rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP;
-		break;
-	case XFS_RMAP_UNMAP_SHARED:
-		rmap->me_flags |= XFS_RMAP_EXTENT_UNMAP_SHARED;
-		break;
-	case XFS_RMAP_CONVERT:
-		rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT;
-		break;
-	case XFS_RMAP_CONVERT_SHARED:
-		rmap->me_flags |= XFS_RMAP_EXTENT_CONVERT_SHARED;
-		break;
-	case XFS_RMAP_ALLOC:
-		rmap->me_flags |= XFS_RMAP_EXTENT_ALLOC;
-		break;
-	case XFS_RMAP_FREE:
-		rmap->me_flags |= XFS_RMAP_EXTENT_FREE;
-		break;
-	default:
-		ASSERT(0);
-	}
-}
-
-struct xfs_rud_log_item *
-xfs_trans_get_rud(
-	struct xfs_trans		*tp,
-	struct xfs_rui_log_item		*ruip)
-{
-	struct xfs_rud_log_item		*rudp;
-
-	rudp = xfs_rud_init(tp->t_mountp, ruip);
-	xfs_trans_add_item(tp, &rudp->rud_item);
-	return rudp;
-}
-
-/*
- * Finish an rmap update and log it to the RUD. Note that the transaction is
- * marked dirty regardless of whether the rmap update succeeds or fails to
- * support the RUI/RUD lifecycle rules.
- */
-int
-xfs_trans_log_finish_rmap_update(
-	struct xfs_trans		*tp,
-	struct xfs_rud_log_item		*rudp,
-	enum xfs_rmap_intent_type	type,
-	uint64_t			owner,
-	int				whichfork,
-	xfs_fileoff_t			startoff,
-	xfs_fsblock_t			startblock,
-	xfs_filblks_t			blockcount,
-	xfs_exntst_t			state,
-	struct xfs_btree_cur		**pcur)
-{
-	int				error;
-
-	error = xfs_rmap_finish_one(tp, type, owner, whichfork, startoff,
-			startblock, blockcount, state, pcur);
-
-	/*
-	 * Mark the transaction dirty, even on error. This ensures the
-	 * transaction is aborted, which:
-	 *
-	 * 1.) releases the RUI and frees the RUD
-	 * 2.) shuts down the filesystem
-	 */
-	tp->t_flags |= XFS_TRANS_DIRTY;
-	set_bit(XFS_LI_DIRTY, &rudp->rud_item.li_flags);
-
-	return error;
-}
-
-/* Sort rmap intents by AG. */
-static int
-xfs_rmap_update_diff_items(
-	void				*priv,
-	struct list_head		*a,
-	struct list_head		*b)
-{
-	struct xfs_mount		*mp = priv;
-	struct xfs_rmap_intent		*ra;
-	struct xfs_rmap_intent		*rb;
-
-	ra = container_of(a, struct xfs_rmap_intent, ri_list);
-	rb = container_of(b, struct xfs_rmap_intent, ri_list);
-	return  XFS_FSB_TO_AGNO(mp, ra->ri_bmap.br_startblock) -
-		XFS_FSB_TO_AGNO(mp, rb->ri_bmap.br_startblock);
-}
-
-/* Get an RUI. */
-STATIC void *
-xfs_rmap_update_create_intent(
-	struct xfs_trans		*tp,
-	unsigned int			count)
-{
-	struct xfs_rui_log_item		*ruip;
-
-	ASSERT(tp != NULL);
-	ASSERT(count > 0);
-
-	ruip = xfs_rui_init(tp->t_mountp, count);
-	ASSERT(ruip != NULL);
-
-	/*
-	 * Get a log_item_desc to point at the new item.
-	 */
-	xfs_trans_add_item(tp, &ruip->rui_item);
-	return ruip;
-}
-
-/* Log rmap updates in the intent item. */
-STATIC void
-xfs_rmap_update_log_item(
-	struct xfs_trans		*tp,
-	void				*intent,
-	struct list_head		*item)
-{
-	struct xfs_rui_log_item		*ruip = intent;
-	struct xfs_rmap_intent		*rmap;
-	uint				next_extent;
-	struct xfs_map_extent		*map;
-
-	rmap = container_of(item, struct xfs_rmap_intent, ri_list);
-
-	tp->t_flags |= XFS_TRANS_DIRTY;
-	set_bit(XFS_LI_DIRTY, &ruip->rui_item.li_flags);
-
-	/*
-	 * atomic_inc_return gives us the value after the increment;
-	 * we want to use it as an array index so we need to subtract 1 from
-	 * it.
-	 */
-	next_extent = atomic_inc_return(&ruip->rui_next_extent) - 1;
-	ASSERT(next_extent < ruip->rui_format.rui_nextents);
-	map = &ruip->rui_format.rui_extents[next_extent];
-	map->me_owner = rmap->ri_owner;
-	map->me_startblock = rmap->ri_bmap.br_startblock;
-	map->me_startoff = rmap->ri_bmap.br_startoff;
-	map->me_len = rmap->ri_bmap.br_blockcount;
-	xfs_trans_set_rmap_flags(map, rmap->ri_type, rmap->ri_whichfork,
-			rmap->ri_bmap.br_state);
-}
-
-/* Get an RUD so we can process all the deferred rmap updates. */
-STATIC void *
-xfs_rmap_update_create_done(
-	struct xfs_trans		*tp,
-	void				*intent,
-	unsigned int			count)
-{
-	return xfs_trans_get_rud(tp, intent);
-}
-
-/* Process a deferred rmap update. */
-STATIC int
-xfs_rmap_update_finish_item(
-	struct xfs_trans		*tp,
-	struct list_head		*item,
-	void				*done_item,
-	void				**state)
-{
-	struct xfs_rmap_intent		*rmap;
-	int				error;
-
-	rmap = container_of(item, struct xfs_rmap_intent, ri_list);
-	error = xfs_trans_log_finish_rmap_update(tp, done_item,
-			rmap->ri_type,
-			rmap->ri_owner, rmap->ri_whichfork,
-			rmap->ri_bmap.br_startoff,
-			rmap->ri_bmap.br_startblock,
-			rmap->ri_bmap.br_blockcount,
-			rmap->ri_bmap.br_state,
-			(struct xfs_btree_cur **)state);
-	kmem_free(rmap);
-	return error;
-}
-
-/* Clean up after processing deferred rmaps. */
-STATIC void
-xfs_rmap_update_finish_cleanup(
-	struct xfs_trans	*tp,
-	void			*state,
-	int			error)
-{
-	struct xfs_btree_cur	*rcur = state;
-
-	xfs_rmap_finish_one_cleanup(tp, rcur, error);
-}
-
-/* Abort all pending RUIs. */
-STATIC void
-xfs_rmap_update_abort_intent(
-	void				*intent)
-{
-	xfs_rui_release(intent);
-}
-
-/* Cancel a deferred rmap update. */
-STATIC void
-xfs_rmap_update_cancel_item(
-	struct list_head		*item)
-{
-	struct xfs_rmap_intent		*rmap;
-
-	rmap = container_of(item, struct xfs_rmap_intent, ri_list);
-	kmem_free(rmap);
-}
-
-const struct xfs_defer_op_type xfs_rmap_update_defer_type = {
-	.max_items	= XFS_RUI_MAX_FAST_EXTENTS,
-	.diff_items	= xfs_rmap_update_diff_items,
-	.create_intent	= xfs_rmap_update_create_intent,
-	.abort_intent	= xfs_rmap_update_abort_intent,
-	.log_item	= xfs_rmap_update_log_item,
-	.create_done	= xfs_rmap_update_create_done,
-	.finish_item	= xfs_rmap_update_finish_item,
-	.finish_cleanup = xfs_rmap_update_finish_cleanup,
-	.cancel_item	= xfs_rmap_update_cancel_item,
-};
diff --git a/fs/xfs/xfs_xattr.c b/fs/xfs/xfs_xattr.c
index 63ee1d5bf1d7..3123b5aaad2a 100644
--- a/fs/xfs/xfs_xattr.c
+++ b/fs/xfs/xfs_xattr.c
@@ -5,15 +5,12 @@
  */
 
 #include "xfs.h"
+#include "xfs_shared.h"
 #include "xfs_format.h"
 #include "xfs_log_format.h"
-#include "xfs_trans_resv.h"
-#include "xfs_mount.h"
 #include "xfs_da_format.h"
 #include "xfs_inode.h"
 #include "xfs_attr.h"
-#include "xfs_attr_leaf.h"
-#include "xfs_acl.h"
 
 #include <linux/posix_acl_xattr.h>
 #include <linux/xattr.h>
@@ -129,6 +126,9 @@ __xfs_xattr_put_listent(
 	char *offset;
 	int arraytop;
 
+	if (context->count < 0 || context->seen_enough)
+		return;
+
 	if (!context->alist)
 		goto compute_size;