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dm raid: add support for resync w/o metadata devices

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Target does not honour the "sync" argument when activated w/o metadata
devices, e.g. with table line:
"0 $(blockdev --getsz $data1) raid raid1 2 0 sync 2 - $data1 - $data2".

Fix this to support temporary, transient raid devices useful
for data duplication.

Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
This commit is contained in:
Heinz Mauelshagen 2025-06-16 16:50:05 +02:00 committed by Mikulas Patocka
parent 75227ed681
commit 9de4a3967c
1 changed files with 4 additions and 0 deletions
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4
drivers/md/dm-raid.c
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@ -2532,6 +2532,10 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs)
struct md_rdev *rdev, *freshest;
struct mddev *mddev = &rs->md;
/* Respect resynchronization requested with "sync" argument. */
if (test_bit(__CTR_FLAG_SYNC, &rs->ctr_flags))
set_bit(MD_ARRAY_FIRST_USE, &mddev->flags);
freshest = NULL;
rdev_for_each(rdev, mddev) {
if (test_bit(Journal, &rdev->flags))