The patch below does not apply to the 4.4-stable tree. If someone wants it applied there, or to any other stable or longterm tree, then please email the backport, including the original git commit id to stable@vger.kernel.org.
thanks,
greg k-h
------------------ original commit in Linus's tree ------------------
From 179006688a7e888cbff39577189f2e034786d06a Mon Sep 17 00:00:00 2001
From: Filipe Manana fdmanana@suse.com Date: Wed, 19 Jun 2019 13:05:50 +0100 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
diff --git a/fs/btrfs/file.c b/fs/btrfs/file.c index 5370152ea7e3..b455bdf46faa 100644 --- a/fs/btrfs/file.c +++ b/fs/btrfs/file.c @@ -2711,6 +2711,11 @@ 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);