From 9092c02d943515b3c9ffd5d0003527f8cc1dd77b Mon Sep 17 00:00:00 2001 From: Jonathan Brassow Date: Thu, 2 May 2013 14:19:24 -0500 Subject: DM RAID: Add ability to restore transiently failed devices on resume DM RAID: Add ability to restore transiently failed devices on resume This patch adds code to the resume function to check over the devices in the RAID array. If any are found to be marked as failed and their superblocks can be read, an attempt is made to reintegrate them into the array. This allows the user to refresh the array with a simple suspend and resume of the array - rather than having to load a completely new table, allocate and initialize all the structures and throw away the old instantiation. Signed-off-by: Jonathan Brassow Signed-off-by: NeilBrown --- drivers/md/raid1.c | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'drivers/md/raid1.c') diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 6e17f8181c4b..ec734588a1c6 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1519,8 +1519,9 @@ static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev) p = conf->mirrors+mirror; if (!p->rdev) { - disk_stack_limits(mddev->gendisk, rdev->bdev, - rdev->data_offset << 9); + if (mddev->gendisk) + disk_stack_limits(mddev->gendisk, rdev->bdev, + rdev->data_offset << 9); p->head_position = 0; rdev->raid_disk = mirror; @@ -1559,7 +1560,7 @@ static int raid1_add_disk(struct mddev *mddev, struct md_rdev *rdev) clear_bit(Unmerged, &rdev->flags); } md_integrity_add_rdev(rdev, mddev); - if (blk_queue_discard(bdev_get_queue(rdev->bdev))) + if (mddev->queue && blk_queue_discard(bdev_get_queue(rdev->bdev))) queue_flag_set_unlocked(QUEUE_FLAG_DISCARD, mddev->queue); print_conf(conf); return err; -- cgit