[PATCH AUTOSEL 4.18 36/65] dm raid: fix rebuild of specific devices by updating superblock

[Sasha Levin]

From: Heinz Mauelshagen <hei...@redhat.com>

[ Upstream commit c44a5ee803d2b7ed8c2e6ce24a5c4dd60778886e ]

Update superblock when particular devices are requested via rebuild
(e.g. lvconvert --replace ...) to avoid spurious failure with the "New
device injected into existing raid set without 'delta_disks' or
'rebuild' parameter specified" error message.

Signed-off-by: Heinz Mauelshagen <hei...@redhat.com>
Signed-off-by: Mike Snitzer <snit...@redhat.com>
Signed-off-by: Sasha Levin <alexander.le...@microsoft.com>
---
 drivers/md/dm-raid.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c
index 2c0d8036fb66..3cd2cbd28758 100644
--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -3126,6 +3126,11 @@ static int raid_ctr(struct dm_target *ti, unsigned int 
argc, char **argv)
                set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags);
                rs_set_new(rs);
        } else if (rs_is_recovering(rs)) {
+               /* Rebuild particular devices */
+               if (test_bit(__CTR_FLAG_REBUILD, &rs->ctr_flags)) {
+                       set_bit(RT_FLAG_UPDATE_SBS, &rs->runtime_flags);
+                       rs_setup_recovery(rs, MaxSector);
+               }
                /* A recovering raid set may be resized */
                ; /* skip setup rs */
        } else if (rs_is_reshaping(rs)) {
-- 
2.17.1