md/raid10: Remove extras after reshape to smaller number of devices.
When a reshape which reduced the number of devices finishes
we must remove the extra devices.
So ensure that raid10_remove_disk won't try to keep them, and
have raid10_finish_reshape clear the 'in_sync' flag. Then
remove_and_add_spares will be able to remove them.
Reported-by: Hannes Reinecke <hare@suse.com>
Signed-off-by: NeilBrown <neilb@suse.de>
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index ae2a5a4..987db37 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1731,6 +1731,7 @@
if (!test_bit(Faulty, &rdev->flags) &&
mddev->recovery_disabled != p->recovery_disabled &&
(!p->replacement || p->replacement == rdev) &&
+ number < conf->geo.raid_disks &&
enough(conf, -1)) {
err = -EBUSY;
goto abort;
@@ -4485,6 +4486,18 @@
mddev->resync_max_sectors = size;
set_capacity(mddev->gendisk, mddev->array_sectors);
revalidate_disk(mddev->gendisk);
+ } else {
+ int d;
+ for (d = conf->geo.raid_disks ;
+ d < conf->geo.raid_disks - mddev->delta_disks;
+ d++) {
+ struct md_rdev *rdev = conf->mirrors[d].rdev;
+ if (rdev)
+ clear_bit(In_sync, &rdev->flags);
+ rdev = conf->mirrors[d].replacement;
+ if (rdev)
+ clear_bit(In_sync, &rdev->flags);
+ }
}
mddev->layout = mddev->new_layout;
mddev->chunk_sectors = 1 << conf->geo.chunk_shift;
