releases/4.4.249/btrfs-quota-set-rescan-progress-to-u64-1-if-we-hit-last-leaf.patch

From foo@baz Mon Dec 28 10:12:31 AM CET 2020
From: Qu Wenruo <wqu@suse.com>
Date: Wed, 27 Jun 2018 18:19:55 +0800
Subject: btrfs: quota: Set rescan progress to (u64)-1 if we hit last leaf

From: Qu Wenruo <wqu@suse.com>

commoit 6f7de19ed3d4d3526ca5eca428009f97cf969c2f upstream

Commit ff3d27a048d9 ("btrfs: qgroup: Finish rescan when hit the last leaf
of extent tree") added a new exit for rescan finish.

However after finishing quota rescan, we set
fs_info->qgroup_rescan_progress to (u64)-1 before we exit through the
original exit path.
While we missed that assignment of (u64)-1 in the new exit path.

The end result is, the quota status item doesn't have the same value.
(-1 vs the last bytenr + 1)
Although it doesn't affect quota accounting, it's still better to keep
the original behavior.

Reported-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Fixes: ff3d27a048d9 ("btrfs: qgroup: Finish rescan when hit the last leaf of extent tree")
Signed-off-by: Qu Wenruo <wqu@suse.com>
Reviewed-by: Misono Tomohiro <misono.tomohiro@jp.fujitsu.com>
Signed-off-by: David Sterba <dsterba@suse.com>
Signed-off-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
 fs/btrfs/qgroup.c |    4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -2288,8 +2288,10 @@ out:
 	}
 	btrfs_put_tree_mod_seq(fs_info, &tree_mod_seq_elem);
 
-	if (done && !ret)
+	if (done && !ret) {
 		ret = 1;
+		fs_info->qgroup_rescan_progress.objectid = (u64)-1;
+	}
 	return ret;
 }