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authorRyusuke Konishi <konishi.ryusuke@lab.ntt.co.jp>2016-08-03 00:05:30 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2016-08-03 02:35:21 +0300
commite63e88bc53bac7e4c3f592f8126c51a7569be673 (patch)
tree6e5855b0b227b520f1590afec9def6e5c47b4bee
parent4ce5c3426cbe9193f82345fb103e17dc3335eb4f (diff)
downloadlinux-e63e88bc53bac7e4c3f592f8126c51a7569be673.tar.xz
nilfs2: move ioctl interface and disk layout to uapi separately
The header file "include/linux/nilfs2_fs.h" is composed of parts for ioctl and disk format, and both are intended to be shared with user space programs. This moves them to the uapi directory "include/uapi/linux" splitting the file to "nilfs2_api.h" and "nilfs2_ondisk.h". The following minor changes are accompanied by this migration: - nilfs_direct_node struct in nilfs2/direct.h is converged to nilfs2_ondisk.h because it's an on-disk structure. - inline functions nilfs_rec_len_from_disk() and nilfs_rec_len_to_disk() are moved to nilfs2/dir.c. Link: http://lkml.kernel.org/r/1465825507-3407-4-git-send-email-konishi.ryusuke@lab.ntt.co.jp Signed-off-by: Ryusuke Konishi <konishi.ryusuke@lab.ntt.co.jp> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--Documentation/filesystems/nilfs2.txt3
-rw-r--r--Documentation/ioctl/ioctl-number.txt2
-rw-r--r--MAINTAINERS3
-rw-r--r--fs/nilfs2/bmap.h2
-rw-r--r--fs/nilfs2/btree.h2
-rw-r--r--fs/nilfs2/cpfile.c1
-rw-r--r--fs/nilfs2/cpfile.h3
-rw-r--r--fs/nilfs2/dat.h1
-rw-r--r--fs/nilfs2/dir.c22
-rw-r--r--fs/nilfs2/direct.h10
-rw-r--r--fs/nilfs2/ifile.h1
-rw-r--r--fs/nilfs2/ioctl.c1
-rw-r--r--fs/nilfs2/nilfs.h3
-rw-r--r--fs/nilfs2/segment.h1
-rw-r--r--fs/nilfs2/sufile.c1
-rw-r--r--fs/nilfs2/sufile.h1
-rw-r--r--include/uapi/linux/nilfs2_api.h292
-rw-r--r--include/uapi/linux/nilfs2_ondisk.h (renamed from include/linux/nilfs2_fs.h)328
18 files changed, 348 insertions, 329 deletions
diff --git a/Documentation/filesystems/nilfs2.txt b/Documentation/filesystems/nilfs2.txt
index 5b21ef76f751..c0727dc36271 100644
--- a/Documentation/filesystems/nilfs2.txt
+++ b/Documentation/filesystems/nilfs2.txt
@@ -267,7 +267,8 @@ among NILFS2 files can be depicted as follows:
`-- file (ino=yy)
( regular file, directory, or symlink )
-For detail on the format of each file, please see include/linux/nilfs2_fs.h.
+For detail on the format of each file, please see nilfs2_ondisk.h
+located at include/uapi/linux directory.
There are no patents or other intellectual property that we protect
with regard to the design of NILFS2. It is allowed to replicate the
diff --git a/Documentation/ioctl/ioctl-number.txt b/Documentation/ioctl/ioctl-number.txt
index 56af5e43e9c0..81c7f2bb7daf 100644
--- a/Documentation/ioctl/ioctl-number.txt
+++ b/Documentation/ioctl/ioctl-number.txt
@@ -248,7 +248,7 @@ Code Seq#(hex) Include File Comments
'm' 00 drivers/scsi/megaraid/megaraid_ioctl.h conflict!
'm' 00-1F net/irda/irmod.h conflict!
'n' 00-7F linux/ncp_fs.h and fs/ncpfs/ioctl.c
-'n' 80-8F linux/nilfs2_fs.h NILFS2
+'n' 80-8F uapi/linux/nilfs2_api.h NILFS2
'n' E0-FF linux/matroxfb.h matroxfb
'o' 00-1F fs/ocfs2/ocfs2_fs.h OCFS2
'o' 00-03 mtd/ubi-user.h conflict! (OCFS2 and UBI overlaps)
diff --git a/MAINTAINERS b/MAINTAINERS
index bb51bbbc9e1d..e9eacacf0f08 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -8258,8 +8258,9 @@ T: git git://github.com/konis/nilfs2.git
S: Supported
F: Documentation/filesystems/nilfs2.txt
F: fs/nilfs2/
-F: include/linux/nilfs2_fs.h
F: include/trace/events/nilfs2.h
+F: include/uapi/linux/nilfs2_api.h
+F: include/uapi/linux/nilfs2_ondisk.h
NINJA SCSI-3 / NINJA SCSI-32Bi (16bit/CardBus) PCMCIA SCSI HOST ADAPTER DRIVER
M: YOKOTA Hiroshi <yokota@netlab.is.tsukuba.ac.jp>
diff --git a/fs/nilfs2/bmap.h b/fs/nilfs2/bmap.h
index b6a4c8f93ac8..2b6ffbe5997a 100644
--- a/fs/nilfs2/bmap.h
+++ b/fs/nilfs2/bmap.h
@@ -22,7 +22,7 @@
#include <linux/types.h>
#include <linux/fs.h>
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_ondisk.h> /* nilfs_binfo, nilfs_inode, etc */
#include "alloc.h"
#include "dat.h"
diff --git a/fs/nilfs2/btree.h b/fs/nilfs2/btree.h
index df1a25faa83b..2184e47fa4bf 100644
--- a/fs/nilfs2/btree.h
+++ b/fs/nilfs2/btree.h
@@ -22,7 +22,7 @@
#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/list.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_ondisk.h> /* nilfs_btree_node */
#include "btnode.h"
#include "bmap.h"
diff --git a/fs/nilfs2/cpfile.c b/fs/nilfs2/cpfile.c
index 19d9f4ae8347..a15a1601e931 100644
--- a/fs/nilfs2/cpfile.c
+++ b/fs/nilfs2/cpfile.c
@@ -21,7 +21,6 @@
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/errno.h>
-#include <linux/nilfs2_fs.h>
#include "mdt.h"
#include "cpfile.h"
diff --git a/fs/nilfs2/cpfile.h b/fs/nilfs2/cpfile.h
index 0249744ae234..6eca972f9673 100644
--- a/fs/nilfs2/cpfile.h
+++ b/fs/nilfs2/cpfile.h
@@ -21,7 +21,8 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_api.h> /* nilfs_cpstat */
+#include <linux/nilfs2_ondisk.h> /* nilfs_inode, nilfs_checkpoint */
int nilfs_cpfile_get_checkpoint(struct inode *, __u64, int,
diff --git a/fs/nilfs2/dat.h b/fs/nilfs2/dat.h
index abbfdabcabea..57dc6cf466d0 100644
--- a/fs/nilfs2/dat.h
+++ b/fs/nilfs2/dat.h
@@ -22,6 +22,7 @@
#include <linux/types.h>
#include <linux/buffer_head.h>
#include <linux/fs.h>
+#include <linux/nilfs2_ondisk.h> /* nilfs_inode, nilfs_checkpoint */
struct nilfs_palloc_req;
diff --git a/fs/nilfs2/dir.c b/fs/nilfs2/dir.c
index 746956d2937a..908ebbf0ac7e 100644
--- a/fs/nilfs2/dir.c
+++ b/fs/nilfs2/dir.c
@@ -42,6 +42,28 @@
#include "nilfs.h"
#include "page.h"
+static inline unsigned int nilfs_rec_len_from_disk(__le16 dlen)
+{
+ unsigned int len = le16_to_cpu(dlen);
+
+#if (PAGE_SIZE >= 65536)
+ if (len == NILFS_MAX_REC_LEN)
+ return 1 << 16;
+#endif
+ return len;
+}
+
+static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
+{
+#if (PAGE_SIZE >= 65536)
+ if (len == (1 << 16))
+ return cpu_to_le16(NILFS_MAX_REC_LEN);
+
+ BUG_ON(len > (1 << 16));
+#endif
+ return cpu_to_le16(len);
+}
+
/*
* nilfs uses block-sized chunks. Arguably, sector-sized ones would be
* more robust, but we have what we have
diff --git a/fs/nilfs2/direct.h b/fs/nilfs2/direct.h
index 3015a6e78724..cfe85e848bba 100644
--- a/fs/nilfs2/direct.h
+++ b/fs/nilfs2/direct.h
@@ -24,16 +24,6 @@
#include "bmap.h"
-/**
- * struct nilfs_direct_node - direct node
- * @dn_flags: flags
- * @dn_pad: padding
- */
-struct nilfs_direct_node {
- __u8 dn_flags;
- __u8 pad[7];
-};
-
#define NILFS_DIRECT_NBLOCKS (NILFS_BMAP_SIZE / sizeof(__le64) - 1)
#define NILFS_DIRECT_KEY_MIN 0
#define NILFS_DIRECT_KEY_MAX (NILFS_DIRECT_NBLOCKS - 1)
diff --git a/fs/nilfs2/ifile.h b/fs/nilfs2/ifile.h
index 23ad2f091e76..188b94fe0ec5 100644
--- a/fs/nilfs2/ifile.h
+++ b/fs/nilfs2/ifile.h
@@ -23,7 +23,6 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
#include "mdt.h"
#include "alloc.h"
diff --git a/fs/nilfs2/ioctl.c b/fs/nilfs2/ioctl.c
index 827283fe9525..f1d7989459fd 100644
--- a/fs/nilfs2/ioctl.c
+++ b/fs/nilfs2/ioctl.c
@@ -25,7 +25,6 @@
#include <linux/compat.h> /* compat_ptr() */
#include <linux/mount.h> /* mnt_want_write_file(), mnt_drop_write_file() */
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
#include "nilfs.h"
#include "segment.h"
#include "bmap.h"
diff --git a/fs/nilfs2/nilfs.h b/fs/nilfs2/nilfs.h
index 2ba8a146af1f..33f8c8fc96e8 100644
--- a/fs/nilfs2/nilfs.h
+++ b/fs/nilfs2/nilfs.h
@@ -23,7 +23,8 @@
#include <linux/buffer_head.h>
#include <linux/spinlock.h>
#include <linux/blkdev.h>
-#include <linux/nilfs2_fs.h>
+#include <linux/nilfs2_api.h>
+#include <linux/nilfs2_ondisk.h>
#include "the_nilfs.h"
#include "bmap.h"
diff --git a/fs/nilfs2/segment.h b/fs/nilfs2/segment.h
index 6565c10b7b76..1060949d7dd2 100644
--- a/fs/nilfs2/segment.h
+++ b/fs/nilfs2/segment.h
@@ -23,7 +23,6 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
#include <linux/workqueue.h>
-#include <linux/nilfs2_fs.h>
#include "nilfs.h"
struct nilfs_root;
diff --git a/fs/nilfs2/sufile.c b/fs/nilfs2/sufile.c
index 12d11de93602..1541a1e9221a 100644
--- a/fs/nilfs2/sufile.c
+++ b/fs/nilfs2/sufile.c
@@ -22,7 +22,6 @@
#include <linux/string.h>
#include <linux/buffer_head.h>
#include <linux/errno.h>
-#include <linux/nilfs2_fs.h>
#include "mdt.h"
#include "sufile.h"
diff --git a/fs/nilfs2/sufile.h b/fs/nilfs2/sufile.h
index 46e89872294c..158a9190c8ec 100644
--- a/fs/nilfs2/sufile.h
+++ b/fs/nilfs2/sufile.h
@@ -21,7 +21,6 @@
#include <linux/fs.h>
#include <linux/buffer_head.h>
-#include <linux/nilfs2_fs.h>
#include "mdt.h"
diff --git a/include/uapi/linux/nilfs2_api.h b/include/uapi/linux/nilfs2_api.h
new file mode 100644
index 000000000000..ef4c1de89b11
--- /dev/null
+++ b/include/uapi/linux/nilfs2_api.h
@@ -0,0 +1,292 @@
+/*
+ * nilfs2_api.h - NILFS2 user space API
+ *
+ * Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published
+ * by the Free Software Foundation; either version 2.1 of the License, or
+ * (at your option) any later version.
+ */
+
+#ifndef _LINUX_NILFS2_API_H
+#define _LINUX_NILFS2_API_H
+
+#include <linux/types.h>
+#include <linux/ioctl.h>
+
+/**
+ * struct nilfs_cpinfo - checkpoint information
+ * @ci_flags: flags
+ * @ci_pad: padding
+ * @ci_cno: checkpoint number
+ * @ci_create: creation timestamp
+ * @ci_nblk_inc: number of blocks incremented by this checkpoint
+ * @ci_inodes_count: inodes count
+ * @ci_blocks_count: blocks count
+ * @ci_next: next checkpoint number in snapshot list
+ */
+struct nilfs_cpinfo {
+ __u32 ci_flags;
+ __u32 ci_pad;
+ __u64 ci_cno;
+ __u64 ci_create;
+ __u64 ci_nblk_inc;
+ __u64 ci_inodes_count;
+ __u64 ci_blocks_count;
+ __u64 ci_next;
+};
+
+/* checkpoint flags */
+enum {
+ NILFS_CPINFO_SNAPSHOT,
+ NILFS_CPINFO_INVALID,
+ NILFS_CPINFO_SKETCH,
+ NILFS_CPINFO_MINOR,
+};
+
+#define NILFS_CPINFO_FNS(flag, name) \
+static inline int \
+nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \
+{ \
+ return !!(cpinfo->ci_flags & (1UL << NILFS_CPINFO_##flag)); \
+}
+
+NILFS_CPINFO_FNS(SNAPSHOT, snapshot)
+NILFS_CPINFO_FNS(INVALID, invalid)
+NILFS_CPINFO_FNS(MINOR, minor)
+
+/**
+ * nilfs_suinfo - segment usage information
+ * @sui_lastmod: timestamp of last modification
+ * @sui_nblocks: number of written blocks in segment
+ * @sui_flags: segment usage flags
+ */
+struct nilfs_suinfo {
+ __u64 sui_lastmod;
+ __u32 sui_nblocks;
+ __u32 sui_flags;
+};
+
+/* segment usage flags */
+enum {
+ NILFS_SUINFO_ACTIVE,
+ NILFS_SUINFO_DIRTY,
+ NILFS_SUINFO_ERROR,
+};
+
+#define NILFS_SUINFO_FNS(flag, name) \
+static inline int \
+nilfs_suinfo_##name(const struct nilfs_suinfo *si) \
+{ \
+ return si->sui_flags & (1UL << NILFS_SUINFO_##flag); \
+}
+
+NILFS_SUINFO_FNS(ACTIVE, active)
+NILFS_SUINFO_FNS(DIRTY, dirty)
+NILFS_SUINFO_FNS(ERROR, error)
+
+static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si)
+{
+ return !si->sui_flags;
+}
+
+/**
+ * nilfs_suinfo_update - segment usage information update
+ * @sup_segnum: segment number
+ * @sup_flags: flags for which fields are active in sup_sui
+ * @sup_reserved: reserved necessary for alignment
+ * @sup_sui: segment usage information
+ */
+struct nilfs_suinfo_update {
+ __u64 sup_segnum;
+ __u32 sup_flags;
+ __u32 sup_reserved;
+ struct nilfs_suinfo sup_sui;
+};
+
+enum {
+ NILFS_SUINFO_UPDATE_LASTMOD,
+ NILFS_SUINFO_UPDATE_NBLOCKS,
+ NILFS_SUINFO_UPDATE_FLAGS,
+ __NR_NILFS_SUINFO_UPDATE_FIELDS,
+};
+
+#define NILFS_SUINFO_UPDATE_FNS(flag, name) \
+static inline void \
+nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup) \
+{ \
+ sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag; \
+} \
+static inline void \
+nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup) \
+{ \
+ sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag); \
+} \
+static inline int \
+nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup) \
+{ \
+ return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\
+}
+
+NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod)
+NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks)
+NILFS_SUINFO_UPDATE_FNS(FLAGS, flags)
+
+enum {
+ NILFS_CHECKPOINT,
+ NILFS_SNAPSHOT,
+};
+
+/**
+ * struct nilfs_cpmode - change checkpoint mode structure
+ * @cm_cno: checkpoint number
+ * @cm_mode: mode of checkpoint
+ * @cm_pad: padding
+ */
+struct nilfs_cpmode {
+ __u64 cm_cno;
+ __u32 cm_mode;
+ __u32 cm_pad;
+};
+
+/**
+ * struct nilfs_argv - argument vector
+ * @v_base: pointer on data array from userspace
+ * @v_nmembs: number of members in data array
+ * @v_size: size of data array in bytes
+ * @v_flags: flags
+ * @v_index: start number of target data items
+ */
+struct nilfs_argv {
+ __u64 v_base;
+ __u32 v_nmembs; /* number of members */
+ __u16 v_size; /* size of members */
+ __u16 v_flags;
+ __u64 v_index;
+};
+
+/**
+ * struct nilfs_period - period of checkpoint numbers
+ * @p_start: start checkpoint number (inclusive)
+ * @p_end: end checkpoint number (exclusive)
+ */
+struct nilfs_period {
+ __u64 p_start;
+ __u64 p_end;
+};
+
+/**
+ * struct nilfs_cpstat - checkpoint statistics
+ * @cs_cno: checkpoint number
+ * @cs_ncps: number of checkpoints
+ * @cs_nsss: number of snapshots
+ */
+struct nilfs_cpstat {
+ __u64 cs_cno;
+ __u64 cs_ncps;
+ __u64 cs_nsss;
+};
+
+/**
+ * struct nilfs_sustat - segment usage statistics
+ * @ss_nsegs: number of segments
+ * @ss_ncleansegs: number of clean segments
+ * @ss_ndirtysegs: number of dirty segments
+ * @ss_ctime: creation time of the last segment
+ * @ss_nongc_ctime: creation time of the last segment not for GC
+ * @ss_prot_seq: least sequence number of segments which must not be reclaimed
+ */
+struct nilfs_sustat {
+ __u64 ss_nsegs;
+ __u64 ss_ncleansegs;
+ __u64 ss_ndirtysegs;
+ __u64 ss_ctime;
+ __u64 ss_nongc_ctime;
+ __u64 ss_prot_seq;
+};
+
+/**
+ * struct nilfs_vinfo - virtual block number information
+ * @vi_vblocknr: virtual block number
+ * @vi_start: start checkpoint number (inclusive)
+ * @vi_end: end checkpoint number (exclusive)
+ * @vi_blocknr: disk block number
+ */
+struct nilfs_vinfo {
+ __u64 vi_vblocknr;
+ __u64 vi_start;
+ __u64 vi_end;
+ __u64 vi_blocknr;
+};
+
+/**
+ * struct nilfs_vdesc - descriptor of virtual block number
+ * @vd_ino: inode number
+ * @vd_cno: checkpoint number
+ * @vd_vblocknr: virtual block number
+ * @vd_period: period of checkpoint numbers
+ * @vd_blocknr: disk block number
+ * @vd_offset: logical block offset inside a file
+ * @vd_flags: flags (data or node block)
+ * @vd_pad: padding
+ */
+struct nilfs_vdesc {
+ __u64 vd_ino;
+ __u64 vd_cno;
+ __u64 vd_vblocknr;
+ struct nilfs_period vd_period;
+ __u64 vd_blocknr;
+ __u64 vd_offset;
+ __u32 vd_flags;
+ __u32 vd_pad;
+};
+
+/**
+ * struct nilfs_bdesc - descriptor of disk block number
+ * @bd_ino: inode number
+ * @bd_oblocknr: disk block address (for skipping dead blocks)
+ * @bd_blocknr: disk block address
+ * @bd_offset: logical block offset inside a file
+ * @bd_level: level in the b-tree organization
+ * @bd_pad: padding
+ */
+struct nilfs_bdesc {
+ __u64 bd_ino;
+ __u64 bd_oblocknr;
+ __u64 bd_blocknr;
+ __u64 bd_offset;
+ __u32 bd_level;
+ __u32 bd_pad;
+};
+
+#define NILFS_IOCTL_IDENT 'n'
+
+#define NILFS_IOCTL_CHANGE_CPMODE \
+ _IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode)
+#define NILFS_IOCTL_DELETE_CHECKPOINT \
+ _IOW(NILFS_IOCTL_IDENT, 0x81, __u64)
+#define NILFS_IOCTL_GET_CPINFO \
+ _IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv)
+#define NILFS_IOCTL_GET_CPSTAT \
+ _IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat)
+#define NILFS_IOCTL_GET_SUINFO \
+ _IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv)
+#define NILFS_IOCTL_GET_SUSTAT \
+ _IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat)
+#define NILFS_IOCTL_GET_VINFO \
+ _IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv)
+#define NILFS_IOCTL_GET_BDESCS \
+ _IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv)
+#define NILFS_IOCTL_CLEAN_SEGMENTS \
+ _IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5])
+#define NILFS_IOCTL_SYNC \
+ _IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
+#define NILFS_IOCTL_RESIZE \
+ _IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
+#define NILFS_IOCTL_SET_ALLOC_RANGE \
+ _IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2])
+#define NILFS_IOCTL_SET_SUINFO \
+ _IOW(NILFS_IOCTL_IDENT, 0x8D, struct nilfs_argv)
+
+#endif /* _LINUX_NILFS2_API_H */
diff --git a/include/linux/nilfs2_fs.h b/include/uapi/linux/nilfs2_ondisk.h
index 5988dd57ba66..2a8a3addb675 100644
--- a/include/linux/nilfs2_fs.h
+++ b/include/uapi/linux/nilfs2_ondisk.h
@@ -1,5 +1,5 @@
/*
- * nilfs2_fs.h - NILFS2 on-disk structures and common declarations.
+ * nilfs2_ondisk.h - NILFS2 on-disk structures
*
* Copyright (C) 2005-2008 Nippon Telegraph and Telephone Corporation.
*
@@ -7,13 +7,6 @@
* it under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 2.1 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 Lesser General Public License for more details.
- *
- * Written by Koji Sato and Ryusuke Konishi.
*/
/*
* linux/include/linux/ext2_fs.h
@@ -30,16 +23,15 @@
* Copyright (C) 1991, 1992 Linus Torvalds
*/
-#ifndef _LINUX_NILFS_FS_H
-#define _LINUX_NILFS_FS_H
+#ifndef _LINUX_NILFS2_ONDISK_H
+#define _LINUX_NILFS2_ONDISK_H
#include <linux/types.h>
-#include <linux/ioctl.h>
#include <linux/magic.h>
-#include <linux/bug.h>
#define NILFS_INODE_BMAP_SIZE 7
+
/**
* struct nilfs_inode - structure of an inode on disk
* @i_blocks: blocks count
@@ -56,7 +48,7 @@
* @i_bmap: block mapping
* @i_xattr: extended attributes
* @i_generation: file generation (for NFS)
- * @i_pad: padding
+ * @i_pad: padding
*/
struct nilfs_inode {
__le64 i_blocks;
@@ -338,29 +330,7 @@ enum {
#define NILFS_DIR_ROUND (NILFS_DIR_PAD - 1)
#define NILFS_DIR_REC_LEN(name_len) (((name_len) + 12 + NILFS_DIR_ROUND) & \
~NILFS_DIR_ROUND)
-#define NILFS_MAX_REC_LEN ((1<<16)-1)
-
-static inline unsigned int nilfs_rec_len_from_disk(__le16 dlen)
-{
- unsigned int len = le16_to_cpu(dlen);
-
-#if !defined(__KERNEL__) || (PAGE_SIZE >= 65536)
- if (len == NILFS_MAX_REC_LEN)
- return 1 << 16;
-#endif
- return len;
-}
-
-static inline __le16 nilfs_rec_len_to_disk(unsigned int len)
-{
-#if !defined(__KERNEL__) || (PAGE_SIZE >= 65536)
- if (len == (1 << 16))
- return cpu_to_le16(NILFS_MAX_REC_LEN);
- else if (len > (1 << 16))
- BUG();
-#endif
- return cpu_to_le16(len);
-}
+#define NILFS_MAX_REC_LEN ((1 << 16) - 1)
/**
* struct nilfs_finfo - file information
@@ -374,11 +344,10 @@ struct nilfs_finfo {
__le64 fi_cno;
__le32 fi_nblocks;
__le32 fi_ndatablk;
- /* array of virtual block numbers */
};
/**
- * struct nilfs_binfo_v - information for the block to which a virtual block number is assigned
+ * struct nilfs_binfo_v - information on a data block (except DAT)
* @bi_vblocknr: virtual block number
* @bi_blkoff: block offset
*/
@@ -388,7 +357,7 @@ struct nilfs_binfo_v {
};
/**
- * struct nilfs_binfo_dat - information for the block which belongs to the DAT file
+ * struct nilfs_binfo_dat - information on a DAT node block
* @bi_blkoff: block offset
* @bi_level: level
* @bi_pad: padding
@@ -454,7 +423,7 @@ struct nilfs_segment_summary {
#define NILFS_SS_GC 0x0010 /* segment written for cleaner operation */
/**
- * struct nilfs_btree_node - B-tree node
+ * struct nilfs_btree_node - header of B-tree node block
* @bn_flags: flags
* @bn_level: level
* @bn_nchildren: number of children
@@ -476,6 +445,16 @@ struct nilfs_btree_node {
#define NILFS_BTREE_LEVEL_MAX 14 /* Max level (exclusive) */
/**
+ * struct nilfs_direct_node - header of built-in bmap array
+ * @dn_flags: flags
+ * @dn_pad: padding
+ */
+struct nilfs_direct_node {
+ __u8 dn_flags;
+ __u8 pad[7];
+};
+
+/**
* struct nilfs_palloc_group_desc - block group descriptor
* @pg_nfrees: number of free entries in block group
*/
@@ -574,40 +553,6 @@ NILFS_CHECKPOINT_FNS(INVALID, invalid)
NILFS_CHECKPOINT_FNS(MINOR, minor)
/**
- * struct nilfs_cpinfo - checkpoint information
- * @ci_flags: flags
- * @ci_pad: padding
- * @ci_cno: checkpoint number
- * @ci_create: creation timestamp
- * @ci_nblk_inc: number of blocks incremented by this checkpoint
- * @ci_inodes_count: inodes count
- * @ci_blocks_count: blocks count
- * @ci_next: next checkpoint number in snapshot list
- */
-struct nilfs_cpinfo {
- __u32 ci_flags;
- __u32 ci_pad;
- __u64 ci_cno;
- __u64 ci_create;
- __u64 ci_nblk_inc;
- __u64 ci_inodes_count;
- __u64 ci_blocks_count;
- __u64 ci_next;
-};
-
-#define NILFS_CPINFO_FNS(flag, name) \
-static inline int \
-nilfs_cpinfo_##name(const struct nilfs_cpinfo *cpinfo) \
-{ \
- return !!(cpinfo->ci_flags & (1UL << NILFS_CHECKPOINT_##flag)); \
-}
-
-NILFS_CPINFO_FNS(SNAPSHOT, snapshot)
-NILFS_CPINFO_FNS(INVALID, invalid)
-NILFS_CPINFO_FNS(MINOR, minor)
-
-
-/**
* struct nilfs_cpfile_header - checkpoint file header
* @ch_ncheckpoints: number of checkpoints
* @ch_nsnapshots: number of snapshots
@@ -619,7 +564,7 @@ struct nilfs_cpfile_header {
struct nilfs_snapshot_list ch_snapshot_list;
};
-#define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET \
+#define NILFS_CPFILE_FIRST_CHECKPOINT_OFFSET \
((sizeof(struct nilfs_cpfile_header) + \
sizeof(struct nilfs_checkpoint) - 1) / \
sizeof(struct nilfs_checkpoint))
@@ -643,8 +588,6 @@ enum {
NILFS_SEGMENT_USAGE_ACTIVE,
NILFS_SEGMENT_USAGE_DIRTY,
NILFS_SEGMENT_USAGE_ERROR,
-
- /* ... */
};
#define NILFS_SEGMENT_USAGE_FNS(flag, name) \
@@ -699,236 +642,9 @@ struct nilfs_sufile_header {
/* ... */
};
-#define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET \
+#define NILFS_SUFILE_FIRST_SEGMENT_USAGE_OFFSET \
((sizeof(struct nilfs_sufile_header) + \
sizeof(struct nilfs_segment_usage) - 1) / \
sizeof(struct nilfs_segment_usage))
-/**
- * nilfs_suinfo - segment usage information
- * @sui_lastmod: timestamp of last modification
- * @sui_nblocks: number of written blocks in segment
- * @sui_flags: segment usage flags
- */
-struct nilfs_suinfo {
- __u64 sui_lastmod;
- __u32 sui_nblocks;
- __u32 sui_flags;
-};
-
-#define NILFS_SUINFO_FNS(flag, name) \
-static inline int \
-nilfs_suinfo_##name(const struct nilfs_suinfo *si) \
-{ \
- return si->sui_flags & (1UL << NILFS_SEGMENT_USAGE_##flag); \
-}
-
-NILFS_SUINFO_FNS(ACTIVE, active)
-NILFS_SUINFO_FNS(DIRTY, dirty)
-NILFS_SUINFO_FNS(ERROR, error)
-
-static inline int nilfs_suinfo_clean(const struct nilfs_suinfo *si)
-{
- return !si->sui_flags;
-}
-
-/* ioctl */
-/**
- * nilfs_suinfo_update - segment usage information update
- * @sup_segnum: segment number
- * @sup_flags: flags for which fields are active in sup_sui
- * @sup_reserved: reserved necessary for alignment
- * @sup_sui: segment usage information
- */
-struct nilfs_suinfo_update {
- __u64 sup_segnum;
- __u32 sup_flags;
- __u32 sup_reserved;
- struct nilfs_suinfo sup_sui;
-};
-
-enum {
- NILFS_SUINFO_UPDATE_LASTMOD,
- NILFS_SUINFO_UPDATE_NBLOCKS,
- NILFS_SUINFO_UPDATE_FLAGS,
- __NR_NILFS_SUINFO_UPDATE_FIELDS,
-};
-
-#define NILFS_SUINFO_UPDATE_FNS(flag, name) \
-static inline void \
-nilfs_suinfo_update_set_##name(struct nilfs_suinfo_update *sup) \
-{ \
- sup->sup_flags |= 1UL << NILFS_SUINFO_UPDATE_##flag; \
-} \
-static inline void \
-nilfs_suinfo_update_clear_##name(struct nilfs_suinfo_update *sup) \
-{ \
- sup->sup_flags &= ~(1UL << NILFS_SUINFO_UPDATE_##flag); \
-} \
-static inline int \
-nilfs_suinfo_update_##name(const struct nilfs_suinfo_update *sup) \
-{ \
- return !!(sup->sup_flags & (1UL << NILFS_SUINFO_UPDATE_##flag));\
-}
-
-NILFS_SUINFO_UPDATE_FNS(LASTMOD, lastmod)
-NILFS_SUINFO_UPDATE_FNS(NBLOCKS, nblocks)
-NILFS_SUINFO_UPDATE_FNS(FLAGS, flags)
-
-enum {
- NILFS_CHECKPOINT,
- NILFS_SNAPSHOT,
-};
-
-/**
- * struct nilfs_cpmode - change checkpoint mode structure
- * @cm_cno: checkpoint number
- * @cm_mode: mode of checkpoint
- * @cm_pad: padding
- */
-struct nilfs_cpmode {
- __u64 cm_cno;
- __u32 cm_mode;
- __u32 cm_pad;
-};
-
-/**
- * struct nilfs_argv - argument vector
- * @v_base: pointer on data array from userspace
- * @v_nmembs: number of members in data array
- * @v_size: size of data array in bytes
- * @v_flags: flags
- * @v_index: start number of target data items
- */
-struct nilfs_argv {
- __u64 v_base;
- __u32 v_nmembs; /* number of members */
- __u16 v_size; /* size of members */
- __u16 v_flags;
- __u64 v_index;
-};
-
-/**
- * struct nilfs_period - period of checkpoint numbers
- * @p_start: start checkpoint number (inclusive)
- * @p_end: end checkpoint number (exclusive)
- */
-struct nilfs_period {
- __u64 p_start;
- __u64 p_end;
-};
-
-/**
- * struct nilfs_cpstat - checkpoint statistics
- * @cs_cno: checkpoint number
- * @cs_ncps: number of checkpoints
- * @cs_nsss: number of snapshots
- */
-struct nilfs_cpstat {
- __u64 cs_cno;
- __u64 cs_ncps;
- __u64 cs_nsss;
-};
-
-/**
- * struct nilfs_sustat - segment usage statistics
- * @ss_nsegs: number of segments
- * @ss_ncleansegs: number of clean segments
- * @ss_ndirtysegs: number of dirty segments
- * @ss_ctime: creation time of the last segment
- * @ss_nongc_ctime: creation time of the last segment not for GC
- * @ss_prot_seq: least sequence number of segments which must not be reclaimed
- */
-struct nilfs_sustat {
- __u64 ss_nsegs;
- __u64 ss_ncleansegs;
- __u64 ss_ndirtysegs;
- __u64 ss_ctime;
- __u64 ss_nongc_ctime;
- __u64 ss_prot_seq;
-};
-
-/**
- * struct nilfs_vinfo - virtual block number information
- * @vi_vblocknr: virtual block number
- * @vi_start: start checkpoint number (inclusive)
- * @vi_end: end checkpoint number (exclusive)
- * @vi_blocknr: disk block number
- */
-struct nilfs_vinfo {
- __u64 vi_vblocknr;
- __u64 vi_start;
- __u64 vi_end;
- __u64 vi_blocknr;
-};
-
-/**
- * struct nilfs_vdesc - descriptor of virtual block number
- * @vd_ino: inode number
- * @vd_cno: checkpoint number
- * @vd_vblocknr: virtual block number
- * @vd_period: period of checkpoint numbers
- * @vd_blocknr: disk block number
- * @vd_offset: logical block offset inside a file
- * @vd_flags: flags (data or node block)
- * @vd_pad: padding
- */
-struct nilfs_vdesc {
- __u64 vd_ino;
- __u64 vd_cno;
- __u64 vd_vblocknr;
- struct nilfs_period vd_period;
- __u64 vd_blocknr;
- __u64 vd_offset;
- __u32 vd_flags;
- __u32 vd_pad;
-};
-
-/**
- * struct nilfs_bdesc - descriptor of disk block number
- * @bd_ino: inode number
- * @bd_oblocknr: disk block address (for skipping dead blocks)
- * @bd_blocknr: disk block address
- * @bd_offset: logical block offset inside a file
- * @bd_level: level in the b-tree organization
- * @bd_pad: padding
- */
-struct nilfs_bdesc {
- __u64 bd_ino;
- __u64 bd_oblocknr;
- __u64 bd_blocknr;
- __u64 bd_offset;
- __u32 bd_level;
- __u32 bd_pad;
-};
-
-#define NILFS_IOCTL_IDENT 'n'
-
-#define NILFS_IOCTL_CHANGE_CPMODE \
- _IOW(NILFS_IOCTL_IDENT, 0x80, struct nilfs_cpmode)
-#define NILFS_IOCTL_DELETE_CHECKPOINT \
- _IOW(NILFS_IOCTL_IDENT, 0x81, __u64)
-#define NILFS_IOCTL_GET_CPINFO \
- _IOR(NILFS_IOCTL_IDENT, 0x82, struct nilfs_argv)
-#define NILFS_IOCTL_GET_CPSTAT \
- _IOR(NILFS_IOCTL_IDENT, 0x83, struct nilfs_cpstat)
-#define NILFS_IOCTL_GET_SUINFO \
- _IOR(NILFS_IOCTL_IDENT, 0x84, struct nilfs_argv)
-#define NILFS_IOCTL_GET_SUSTAT \
- _IOR(NILFS_IOCTL_IDENT, 0x85, struct nilfs_sustat)
-#define NILFS_IOCTL_GET_VINFO \
- _IOWR(NILFS_IOCTL_IDENT, 0x86, struct nilfs_argv)
-#define NILFS_IOCTL_GET_BDESCS \
- _IOWR(NILFS_IOCTL_IDENT, 0x87, struct nilfs_argv)
-#define NILFS_IOCTL_CLEAN_SEGMENTS \
- _IOW(NILFS_IOCTL_IDENT, 0x88, struct nilfs_argv[5])
-#define NILFS_IOCTL_SYNC \
- _IOR(NILFS_IOCTL_IDENT, 0x8A, __u64)
-#define NILFS_IOCTL_RESIZE \
- _IOW(NILFS_IOCTL_IDENT, 0x8B, __u64)
-#define NILFS_IOCTL_SET_ALLOC_RANGE \
- _IOW(NILFS_IOCTL_IDENT, 0x8C, __u64[2])
-#define NILFS_IOCTL_SET_SUINFO \
- _IOW(NILFS_IOCTL_IDENT, 0x8D, struct nilfs_argv)
-
-#endif /* _LINUX_NILFS_FS_H */
+#endif /* _LINUX_NILFS2_ONDISK_H */