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authorNeil Brown <neilb@notabene.brown>2008-06-28 08:31:31 +1000
committerNeil Brown <neilb@notabene.brown>2008-06-28 08:31:31 +1000
commit6c2fce2ef6b4821c21b5c42c7207cb9cf8c87eda (patch)
tree726b16f46c039df387f7cdfe0d195821d8955532 /drivers/md/raid10.c
parent8ed0a5216a0238f53b482ec88ce4aeed4b9f0da1 (diff)
downloadop-kernel-dev-6c2fce2ef6b4821c21b5c42c7207cb9cf8c87eda.zip
op-kernel-dev-6c2fce2ef6b4821c21b5c42c7207cb9cf8c87eda.tar.gz
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>
Diffstat (limited to 'drivers/md/raid10.c')
-rw-r--r--drivers/md/raid10.c10
1 files changed, 8 insertions, 2 deletions
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 @@ 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,
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