Support adding a spare to a live md array with external metadata.
i.e. extend the 'md/dev-XXX/slot' attribute so that you can
tell a device to fill an vacant slot in an and md array.
Signed-off-by: Neil Brown <neilb@suse.de>
diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c
index a71277b..50ad8d2 100644
--- a/drivers/md/raid10.c
+++ b/drivers/md/raid10.c
@@ -1116,6 +1116,8 @@
int found = 0;
int mirror;
mirror_info_t *p;
+ int first = 0;
+ int last = mddev->raid_disks - 1;
if (mddev->recovery_cp < MaxSector)
/* only hot-add to in-sync arrays, as recovery is
@@ -1125,12 +1127,16 @@
if (!enough(conf))
return 0;
+ if (rdev->raid_disk)
+ first = last = rdev->raid_disk;
+
if (rdev->saved_raid_disk >= 0 &&
+ rdev->saved_raid_disk >= first &&
conf->mirrors[rdev->saved_raid_disk].rdev == NULL)
mirror = rdev->saved_raid_disk;
else
- mirror = 0;
- for ( ; mirror < mddev->raid_disks; mirror++)
+ mirror = first;
+ for ( ; mirror <= last ; mirror++)
if ( !(p=conf->mirrors+mirror)->rdev) {
blk_queue_stack_limits(mddev->queue,