[PATCH 4.9 37/59] dm raid: fix rebuild of specific devices by updating superblock

Greg Kroah-Hartman
2018-10-08T18:39:42Z

From: Heinz Mauelshagen <heinzm@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 <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
drivers/md/dm-raid.c | 5 +++++
1 file changed, 5 insertions(+)

--- a/drivers/md/dm-raid.c
+++ b/drivers/md/dm-raid.c
@@ -2880,6 +2880,11 @@ static int raid_ctr(struct dm_target *ti
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)) {