From: Filipe Manana <fdmanana@suse.com>
Date: Wed, 19 Jun 2019 13:05:50 +0100
Git-commit: 179006688a7e888cbff39577189f2e034786d06a
Patch-mainline: 5.3-rc1
References: bsc#1140487
Subject: [PATCH] Btrfs: add missing inode version, ctime and mtime updates
 when punching hole

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>
---
 fs/btrfs/file.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c
index e4137008e12b..320b01580f2e 100644
--- a/fs/btrfs/file.c
+++ b/fs/btrfs/file.c
@@ -2783,6 +2783,11 @@ static int btrfs_punch_hole(struct inode *inode, loff_t offset, loff_t len)
 		 * 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 timespec 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);
-- 
2.16.4