From 6c2fce2ef6b4821c21b5c42c7207cb9cf8c87eda Mon Sep 17 00:00:00 2001 From: Neil Brown Date: Sat, 28 Jun 2008 08:31:31 +1000 Subject: 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 --- drivers/md/raid10.c | 10 ++++++++-- 1 file changed, 8 insertions(+), 2 deletions(-) (limited to 'drivers/md/raid10.c') diff --git a/drivers/md/raid10.c b/drivers/md/raid10.c index a71277b640a..50ad8d2ae0e 100644 --- a/drivers/md/raid10.c +++ b/drivers/md/raid10.c @@ -1116,6 +1116,8 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev) 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 @@ static int raid10_add_disk(mddev_t *mddev, mdk_rdev_t *rdev) 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, -- cgit v1.2.3