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/raid1.c b/drivers/md/raid1.c
index c610b94..d32fc55 100644
--- a/drivers/md/raid1.c
+++ b/drivers/md/raid1.c
@@ -1103,8 +1103,13 @@
int found = 0;
int mirror = 0;
mirror_info_t *p;
+ int first = 0;
+ int last = mddev->raid_disks - 1;
- for (mirror=0; mirror < mddev->raid_disks; mirror++)
+ if (rdev->raid_disk >= 0)
+ first = last = rdev->raid_disk;
+
+ for (mirror = first; mirror <= last; mirror++)
if ( !(p=conf->mirrors+mirror)->rdev) {
blk_queue_stack_limits(mddev->queue,