linux-kernel - [PATCH 4.9 151/175] btrfs: quota: Set rescan progress to (u64)-1 if we hit last leaf

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Message-Id: <20201228124900.575870911@linuxfoundation.org>
Date:   Mon, 28 Dec 2020 13:50:04 +0100
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org,
        Misono Tomohiro <misono.tomohiro@...fujitsu.com>,
        Qu Wenruo <wqu@...e.com>, David Sterba <dsterba@...e.com>,
        Sudip Mukherjee <sudipm.mukherjee@...il.com>
Subject: [PATCH 4.9 151/175] btrfs: quota: Set rescan progress to (u64)-1 if we hit last leaf

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

--- a/fs/btrfs/qgroup.c
+++ b/fs/btrfs/qgroup.c
@@ -2340,8 +2340,10 @@ 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;
 }