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authorLinus Torvalds <torvalds@linux-foundation.org>2017-11-17 23:54:01 +0300
committerLinus Torvalds <torvalds@linux-foundation.org>2017-11-17 23:54:01 +0300
commitca5b857cb0f42986520abd9dbb0c2508067342b2 (patch)
tree7418db33a7156b33bbdf6fff337f5f04e0c4137c /fs
parenta0e136e5da98f10ecb41a673374a04102af45e2b (diff)
parentc02b1a9b41c2e728289f96850580a3651e0a8b5f (diff)
downloadlinux-ca5b857cb0f42986520abd9dbb0c2508067342b2.tar.xz
Merge branch 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull misc vfs updates from Al Viro: "Assorted stuff, really no common topic here" * 'work.misc' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: vfs: grab the lock instead of blocking in __fd_install during resizing vfs: stop clearing close on exec when closing a fd include/linux/fs.h: fix comment about struct address_space fs: make fiemap work from compat_ioctl coda: fix 'kernel memory exposure attempt' in fsync pstore: remove unneeded unlikely() vfs: remove unneeded unlikely() stubs for mount_bdev() and kill_block_super() in !CONFIG_BLOCK case make vfs_ustat() static do_handle_open() should be static elf_fdpic: fix unused variable warning fold destroy_super() into __put_super() new helper: destroy_unused_super() fix address space warnings in ipc/ acct.h: get rid of detritus
Diffstat (limited to 'fs')
-rw-r--r--fs/binfmt_elf_fdpic.c2
-rw-r--r--fs/coda/upcall.c3
-rw-r--r--fs/compat_ioctl.c1
-rw-r--r--fs/fhandle.c4
-rw-r--r--fs/file.c12
-rw-r--r--fs/namei.c2
-rw-r--r--fs/pstore/platform.c2
-rw-r--r--fs/statfs.c2
-rw-r--r--fs/super.c46
9 files changed, 37 insertions, 37 deletions
diff --git a/fs/binfmt_elf_fdpic.c b/fs/binfmt_elf_fdpic.c
index 5429b035e249..429326b6e2e7 100644
--- a/fs/binfmt_elf_fdpic.c
+++ b/fs/binfmt_elf_fdpic.c
@@ -1498,7 +1498,9 @@ static bool elf_fdpic_dump_segments(struct coredump_params *cprm)
struct vm_area_struct *vma;
for (vma = current->mm->mmap; vma; vma = vma->vm_next) {
+#ifdef CONFIG_MMU
unsigned long addr;
+#endif
if (!maydump(vma, cprm->mm_flags))
continue;
diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
index a37f003530d7..1175a1722411 100644
--- a/fs/coda/upcall.c
+++ b/fs/coda/upcall.c
@@ -447,8 +447,7 @@ int venus_fsync(struct super_block *sb, struct CodaFid *fid)
UPARG(CODA_FSYNC);
inp->coda_fsync.VFid = *fid;
- error = coda_upcall(coda_vcp(sb), sizeof(union inputArgs),
- &outsize, inp);
+ error = coda_upcall(coda_vcp(sb), insize, &outsize, inp);
CODA_FREE(inp, insize);
return error;
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index f95aa0b2e9c0..5fc5dc660600 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -1458,6 +1458,7 @@ COMPAT_SYSCALL_DEFINE3(ioctl, unsigned int, fd, unsigned int, cmd,
case FICLONE:
case FICLONERANGE:
case FIDEDUPERANGE:
+ case FS_IOC_FIEMAP:
goto do_ioctl;
case FIBMAP:
diff --git a/fs/fhandle.c b/fs/fhandle.c
index 474adc8d2a3a..0ace128f5d23 100644
--- a/fs/fhandle.c
+++ b/fs/fhandle.c
@@ -213,8 +213,8 @@ out_err:
return retval;
}
-long do_handle_open(int mountdirfd,
- struct file_handle __user *ufh, int open_flag)
+static long do_handle_open(int mountdirfd, struct file_handle __user *ufh,
+ int open_flag)
{
long retval = 0;
struct path path;
diff --git a/fs/file.c b/fs/file.c
index 4eecbf4244a5..3b080834b870 100644
--- a/fs/file.c
+++ b/fs/file.c
@@ -593,13 +593,16 @@ void __fd_install(struct files_struct *files, unsigned int fd,
{
struct fdtable *fdt;
- might_sleep();
rcu_read_lock_sched();
- while (unlikely(files->resize_in_progress)) {
+ if (unlikely(files->resize_in_progress)) {
rcu_read_unlock_sched();
- wait_event(files->resize_wait, !files->resize_in_progress);
- rcu_read_lock_sched();
+ spin_lock(&files->file_lock);
+ fdt = files_fdtable(files);
+ BUG_ON(fdt->fd[fd] != NULL);
+ rcu_assign_pointer(fdt->fd[fd], file);
+ spin_unlock(&files->file_lock);
+ return;
}
/* coupled with smp_wmb() in expand_fdtable() */
smp_rmb();
@@ -632,7 +635,6 @@ int __close_fd(struct files_struct *files, unsigned fd)
if (!file)
goto out_unlock;
rcu_assign_pointer(fdt->fd[fd], NULL);
- __clear_close_on_exec(fd, fdt);
__put_unused_fd(files, fd);
spin_unlock(&files->file_lock);
return filp_close(file, files);
diff --git a/fs/namei.c b/fs/namei.c
index 287781363763..f0c7a7b9b6ca 100644
--- a/fs/namei.c
+++ b/fs/namei.c
@@ -3459,7 +3459,7 @@ static int do_tmpfile(struct nameidata *nd, unsigned flags,
goto out;
child = vfs_tmpfile(path.dentry, op->mode, op->open_flag);
error = PTR_ERR(child);
- if (unlikely(IS_ERR(child)))
+ if (IS_ERR(child))
goto out2;
dput(path.dentry);
path.dentry = child;
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
index 086e491faf04..423159abd501 100644
--- a/fs/pstore/platform.c
+++ b/fs/pstore/platform.c
@@ -651,7 +651,7 @@ static int pstore_write_user_compat(struct pstore_record *record,
return -EINVAL;
record->buf = memdup_user(buf, record->size);
- if (unlikely(IS_ERR(record->buf))) {
+ if (IS_ERR(record->buf)) {
ret = PTR_ERR(record->buf);
goto out;
}
diff --git a/fs/statfs.c b/fs/statfs.c
index c25dd9a26cc1..b072a8bab71a 100644
--- a/fs/statfs.c
+++ b/fs/statfs.c
@@ -217,7 +217,7 @@ SYSCALL_DEFINE3(fstatfs64, unsigned int, fd, size_t, sz, struct statfs64 __user
return error;
}
-int vfs_ustat(dev_t dev, struct kstatfs *sbuf)
+static int vfs_ustat(dev_t dev, struct kstatfs *sbuf)
{
struct super_block *s = user_get_super(dev);
int err;
diff --git a/fs/super.c b/fs/super.c
index 994db21f59bf..d4e33e8f1e6f 100644
--- a/fs/super.c
+++ b/fs/super.c
@@ -155,21 +155,19 @@ static void destroy_super_rcu(struct rcu_head *head)
schedule_work(&s->destroy_work);
}
-/**
- * destroy_super - frees a superblock
- * @s: superblock to free
- *
- * Frees a superblock.
- */
-static void destroy_super(struct super_block *s)
+/* Free a superblock that has never been seen by anyone */
+static void destroy_unused_super(struct super_block *s)
{
+ if (!s)
+ return;
+ up_write(&s->s_umount);
list_lru_destroy(&s->s_dentry_lru);
list_lru_destroy(&s->s_inode_lru);
security_sb_free(s);
- WARN_ON(!list_empty(&s->s_mounts));
put_user_ns(s->s_user_ns);
kfree(s->s_subtype);
- call_rcu(&s->rcu, destroy_super_rcu);
+ /* no delays needed */
+ destroy_super_work(&s->destroy_work);
}
/**
@@ -257,7 +255,7 @@ static struct super_block *alloc_super(struct file_system_type *type, int flags,
return s;
fail:
- destroy_super(s);
+ destroy_unused_super(s);
return NULL;
}
@@ -266,11 +264,17 @@ fail:
/*
* Drop a superblock's refcount. The caller must hold sb_lock.
*/
-static void __put_super(struct super_block *sb)
+static void __put_super(struct super_block *s)
{
- if (!--sb->s_count) {
- list_del_init(&sb->s_list);
- destroy_super(sb);
+ if (!--s->s_count) {
+ list_del_init(&s->s_list);
+ WARN_ON(s->s_dentry_lru.node);
+ WARN_ON(s->s_inode_lru.node);
+ WARN_ON(!list_empty(&s->s_mounts));
+ security_sb_free(s);
+ put_user_ns(s->s_user_ns);
+ kfree(s->s_subtype);
+ call_rcu(&s->rcu, destroy_super_rcu);
}
}
@@ -485,19 +489,12 @@ retry:
continue;
if (user_ns != old->s_user_ns) {
spin_unlock(&sb_lock);
- if (s) {
- up_write(&s->s_umount);
- destroy_super(s);
- }
+ destroy_unused_super(s);
return ERR_PTR(-EBUSY);
}
if (!grab_super(old))
goto retry;
- if (s) {
- up_write(&s->s_umount);
- destroy_super(s);
- s = NULL;
- }
+ destroy_unused_super(s);
return old;
}
}
@@ -512,8 +509,7 @@ retry:
err = set(s, data);
if (err) {
spin_unlock(&sb_lock);
- up_write(&s->s_umount);
- destroy_super(s);
+ destroy_unused_super(s);
return ERR_PTR(err);
}
s->s_type = type;