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authorDmitry Monakhov <dmonakhov@openvz.org>2013-05-28 13:19:01 +0400
committerJan Kara <jack@suse.cz>2013-07-04 19:22:55 +0200
commit3df32196519d1556b8851b610ca1aa68c5b673d3 (patch)
tree4d94cec2052684e7b2a27ca4769654aceca2ca9e /fs/ext3/fsync.c
parenta1457c0ce976bad1356b9b0437f2a5c3ab8a9cfc (diff)
downloadlinux-3df32196519d1556b8851b610ca1aa68c5b673d3.tar.bz2
ext3: Fix fsync error handling after filesystem abort.
If filesystem was aborted we will return success due to (sb->s_flags & MS_RDONLY) which is incorrect and results in data loss. In order to handle fs abort correctly we have to check fs state once we discover that it is in MS_RDONLY state Test case: http://patchwork.ozlabs.org/patch/244297/ Changes from V1: - fix spelling - fix smp_rmb()/debug order Signed-off-by: Dmitry Monakhov <dmonakhov@openvz.org> Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs/ext3/fsync.c')
-rw-r--r--fs/ext3/fsync.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/ext3/fsync.c b/fs/ext3/fsync.c
index b31dbd4c46ad..1cb9c7e10c6f 100644
--- a/fs/ext3/fsync.c
+++ b/fs/ext3/fsync.c
@@ -48,9 +48,13 @@ int ext3_sync_file(struct file *file, loff_t start, loff_t end, int datasync)
trace_ext3_sync_file_enter(file, datasync);
- if (inode->i_sb->s_flags & MS_RDONLY)
+ if (inode->i_sb->s_flags & MS_RDONLY) {
+ /* Make sure that we read updated state */
+ smp_rmb();
+ if (EXT3_SB(inode->i_sb)->s_mount_state & EXT3_ERROR_FS)
+ return -EROFS;
return 0;
-
+ }
ret = filemap_write_and_wait_range(inode->i_mapping, start, end);
if (ret)
goto out;