Btrfs: fix ctime update of on-disk inode
To reproduce the bug:
# touch /mnt/tmp
# stat /mnt/tmp | grep Change
Change: 2011-12-09 09:32:23.412105981 +0800
# chattr +i /mnt/tmp
# stat /mnt/tmp | grep Change
Change: 2011-12-09 09:32:43.198105295 +0800
# umount /mnt
# mount /dev/loop1 /mnt
# stat /mnt/tmp | grep Change
Change: 2011-12-09 09:32:23.412105981 +0800
We should update ctime of in-memory inode before calling
btrfs_update_inode().
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Signed-off-by: Chris Mason <chris.mason@oracle.com>
diff --git a/fs/btrfs/ioctl.c b/fs/btrfs/ioctl.c
index 72d4616..40eaa9f 100644
--- a/fs/btrfs/ioctl.c
+++ b/fs/btrfs/ioctl.c
@@ -252,11 +252,11 @@
trans = btrfs_join_transaction(root);
BUG_ON(IS_ERR(trans));
+ btrfs_update_iflags(inode);
+ inode->i_ctime = CURRENT_TIME;
ret = btrfs_update_inode(trans, root, inode);
BUG_ON(ret);
- btrfs_update_iflags(inode);
- inode->i_ctime = CURRENT_TIME;
btrfs_end_transaction(trans, root);
mnt_drop_write(file->f_path.mnt);