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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-21 10:06:51 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2011-03-21 10:06:51 -0700 |
| commit | 10effcb548c170d59ea1d2152f2ee0ad45ce4c9d (patch) | |
| tree | 6a1bf04ed66a1dcd242e8b2bd0c86690194cc09f /fs/sync.c | |
| parent | c3ca48f062a37c2f79560a9b0b9f1b08039aa248 (diff) | |
| parent | 0f60f240d522772467c7d2cebedb910748c78ed4 (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs-2.6:
FS: lookup_mnt() is only used in the core fs routines now
bfs: fix bitmap size argument to find_first_zero_bit()
fs: Use BUG_ON(!mnt) at dentry_open().
fs: devpts_pty_new() return -ENOMEM if dentry allocation failed
nfs: lock() vs unlock() typo
pstore: fix leaking ->i_private
introduce sys_syncfs to sync a single file system
Small typo fix...
Filesystem: fifo: Fixed coding style issue.
fs/inode: Fix kernel-doc format for inode_init_owner
select: remove unused MAX_SELECT_SECONDS
vfs: cleanup do_vfs_ioctl()
Diffstat (limited to 'fs/sync.c')
| -rw-r--r-- | fs/sync.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/fs/sync.c b/fs/sync.c index ba76b9623e7e..92ca208777d5 100644 --- a/fs/sync.c +++ b/fs/sync.c @@ -7,6 +7,7 @@ #include <linux/fs.h> #include <linux/slab.h> #include <linux/module.h> +#include <linux/namei.h> #include <linux/sched.h> #include <linux/writeback.h> #include <linux/syscalls.h> @@ -128,6 +129,29 @@ void emergency_sync(void) } } +/* + * sync a single super + */ +SYSCALL_DEFINE1(syncfs, int, fd) +{ + struct file *file; + struct super_block *sb; + int ret; + int fput_needed; + + file = fget_light(fd, &fput_needed); + if (!file) + return -EBADF; + sb = file->f_dentry->d_sb; + + down_read(&sb->s_umount); + ret = sync_filesystem(sb); + up_read(&sb->s_umount); + + fput_light(file, fput_needed); + return ret; +} + /** * vfs_fsync_range - helper to sync a range of data & metadata to disk * @file: file to sync |