Btrfs: add missing inode version, ctime and mtime updates when punching hole

commit 179006688a7e888cbff39577189f2e034786d06a upstream.

If the range for which we are punching a hole covers only part of a page,
we end up updating the inode item but we skip the update of the inode's
iversion, mtime and ctime. Fix that by ensuring we update those properties
of the inode.

A patch for fstests test case generic/059 that tests this as been sent
along with this fix.

Fixes: 2aaa66558172b0 ("Btrfs: add hole punching")
Fixes: e8c1c76e804b18 ("Btrfs: add missing inode update when punching hole")
CC: stable@vger.kernel.org # 4.4+
Signed-off-by: Filipe Manana <fdmanana@suse.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index 89f5be2bfb432c64f50aefea1cefec60277de58e..1c7533db16b0e11bb46ad37ada27c4684ee53ab8 100644 (file)
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2721,6 +2721,11 @@ out_only_mutex:
                 * for detecting, at fsync time, if the inode isn't yet in the
                 * log tree or it's there but not up to date.
                 */
+               struct timespec64 now = current_time(inode);
+
+               inode_inc_iversion(inode);
+               inode->i_mtime = now;
+               inode->i_ctime = now;
                trans = btrfs_start_transaction(root, 1);
                if (IS_ERR(trans)) {
                        err = PTR_ERR(trans);