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Support adding a spare to a live md array with external metadata.

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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>
This commit is contained in:
Neil Brown
2008-06-28 08:31:31 +10:00
parent 8ed0a5216a
commit 6c2fce2ef6
5 changed files with 67 additions and 9 deletions
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10
drivers/md/raid10.c
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@@ -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,