diff options
| author | Heinz Mauelshagen <heinzm@redhat.com> | 2016-08-17 15:36:44 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2016-08-17 10:42:39 -0400 |
| commit | 9e7d9367e6a29e4cac85aa6df199f760dfa39c8a (patch) | |
| tree | a48199ad035ece17f02a7c81c791f1329eede3e7 /drivers/md | |
| parent | a3c06a389751192fdcbcdd8bba57bdb856eafe68 (diff) | |
| download | linux-9e7d9367e6a29e4cac85aa6df199f760dfa39c8a.tar.bz2 | |
dm raid: support raid0 with missing metadata devices
The raid0 MD personality does not start a raid0 array with any of its
data devices missing.
dm-raid was removing data/metadata device pairs unconditionally if it
failed to read a superblock off the respective metadata device of such
pair, resulting in failure to start arrays with the raid0 personality.
Avoid removing any data/metadata device pairs in case of raid0
(e.g. lvm2 segment type 'raid0_meta') thus allowing MD to start the
array.
Also, avoid region size validation for raid0.
Signed-off-by: Heinz Mauelshagen <heinzm@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/dm-raid.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index b1c251872800..8abde6b8cedc 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -860,6 +860,9 @@ static int validate_region_size(struct raid_set *rs, unsigned long region_size) { unsigned long min_region_size = rs->ti->len / (1 << 21); + if (rs_is_raid0(rs)) + return 0; + if (!region_size) { /* * Choose a reasonable default. All figures in sectors. @@ -929,6 +932,8 @@ static int validate_raid_redundancy(struct raid_set *rs) rebuild_cnt++; switch (rs->raid_type->level) { + case 0: + break; case 1: if (rebuild_cnt >= rs->md.raid_disks) goto too_many; @@ -2334,6 +2339,13 @@ static int analyse_superblocks(struct dm_target *ti, struct raid_set *rs) case 0: break; default: + /* + * We have to keep any raid0 data/metadata device pairs or + * the MD raid0 personality will fail to start the array. + */ + if (rs_is_raid0(rs)) + continue; + dev = container_of(rdev, struct raid_dev, rdev); if (dev->meta_dev) dm_put_device(ti, dev->meta_dev); |