[PATCH 2/2] btrfs: reset SB MOVED_ON flag for dynamically reappearing missing device

[Anand Jain <anand.jain@oracle.com>]

When the missing device reappears and joins the RAID group, and if there
are no more missing device at the volume level, then reset the
BTRFS_SUPER_FLAG_VOL_MOVED_ON flag.

This patch is on top of the patch [1] in the ML.
[1] btrfs: handle dynamically reappearing missing device

Signed-off-by: Anand Jain <anand.jain@oracle.com>
---
 fs/btrfs/volumes.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/btrfs/volumes.c b/fs/btrfs/volumes.c
index ba32e2d73fbe..8bac1cf17048 100644
--- a/fs/btrfs/volumes.c
+++ b/fs/btrfs/volumes.c
@@ -798,6 +798,10 @@ static noinline int device_list_add(const char *path,
 				btrfs_warn(fs_info,
 					"BTRFS: device %s devid %llu uuid %pU joined\n",
 					path, devid, device->uuid);
+				if (!fs_devices->missing_devices)
+					btrfs_set_super_flags(fs_info->super_copy,
+						fs_info->super_copy->flags &
+						~BTRFS_SUPER_FLAG_VOL_MOVED_ON);
 			}
 
 			if (device->writeable &&
-- 
2.13.1