diff options
Diffstat (limited to 'drivers/md/dm-raid.c')
| -rw-r--r-- | drivers/md/dm-raid.c | 56 |
1 files changed, 35 insertions, 21 deletions
diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 017c34d78d6..f2f29c52654 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -101,20 +101,12 @@ static struct raid_set *context_alloc(struct dm_target *ti, struct raid_type *ra { unsigned i; struct raid_set *rs; - sector_t sectors_per_dev; if (raid_devs <= raid_type->parity_devs) { ti->error = "Insufficient number of devices"; return ERR_PTR(-EINVAL); } - sectors_per_dev = ti->len; - if ((raid_type->level > 1) && - sector_div(sectors_per_dev, (raid_devs - raid_type->parity_devs))) { - ti->error = "Target length not divisible by number of data devices"; - return ERR_PTR(-EINVAL); - } - rs = kzalloc(sizeof(*rs) + raid_devs * sizeof(rs->dev[0]), GFP_KERNEL); if (!rs) { ti->error = "Cannot allocate raid context"; @@ -128,7 +120,6 @@ static struct raid_set *context_alloc(struct dm_target *ti, struct raid_type *ra rs->md.raid_disks = raid_devs; rs->md.level = raid_type->level; rs->md.new_level = rs->md.level; - rs->md.dev_sectors = sectors_per_dev; rs->md.layout = raid_type->algorithm; rs->md.new_layout = rs->md.layout; rs->md.delta_disks = 0; @@ -143,6 +134,7 @@ static struct raid_set *context_alloc(struct dm_target *ti, struct raid_type *ra * rs->md.external * rs->md.chunk_sectors * rs->md.new_chunk_sectors + * rs->md.dev_sectors */ return rs; @@ -353,6 +345,8 @@ static int parse_raid_params(struct raid_set *rs, char **argv, { unsigned i, rebuild_cnt = 0; unsigned long value, region_size = 0; + sector_t sectors_per_dev = rs->ti->len; + sector_t max_io_len; char *key; /* @@ -429,13 +423,28 @@ static int parse_raid_params(struct raid_set *rs, char **argv, if (!strcasecmp(key, "rebuild")) { rebuild_cnt++; - if (((rs->raid_type->level != 1) && - (rebuild_cnt > rs->raid_type->parity_devs)) || - ((rs->raid_type->level == 1) && - (rebuild_cnt > (rs->md.raid_disks - 1)))) { - rs->ti->error = "Too many rebuild devices specified for given RAID type"; + + switch (rs->raid_type->level) { + case 1: + if (rebuild_cnt >= rs->md.raid_disks) { + rs->ti->error = "Too many rebuild devices specified"; + return -EINVAL; + } + break; + case 4: + case 5: + case 6: + if (rebuild_cnt > rs->raid_type->parity_devs) { + rs->ti->error = "Too many rebuild devices specified for given RAID type"; + return -EINVAL; + } + break; + default: + DMERR("The rebuild parameter is not supported for %s", rs->raid_type->name); + rs->ti->error = "Rebuild not supported for this RAID type"; return -EINVAL; } + if (value > rs->md.raid_disks) { rs->ti->error = "Invalid rebuild index given"; return -EINVAL; @@ -522,14 +531,19 @@ static int parse_raid_params(struct raid_set *rs, char **argv, return -EINVAL; if (rs->md.chunk_sectors) - rs->ti->split_io = rs->md.chunk_sectors; + max_io_len = rs->md.chunk_sectors; else - rs->ti->split_io = region_size; + max_io_len = region_size; - if (rs->md.chunk_sectors) - rs->ti->split_io = rs->md.chunk_sectors; - else - rs->ti->split_io = region_size; + if (dm_set_target_max_io_len(rs->ti, max_io_len)) + return -EINVAL; + + if ((rs->raid_type->level > 1) && + sector_div(sectors_per_dev, (rs->md.raid_disks - rs->raid_type->parity_devs))) { + rs->ti->error = "Target length not divisible by number of data devices"; + return -EINVAL; + } + rs->md.dev_sectors = sectors_per_dev; /* Assume there are no metadata devices until the drives are parsed */ rs->md.persistent = 0; @@ -1067,7 +1081,7 @@ static int raid_map(struct dm_target *ti, struct bio *bio, union map_info *map_c } static int raid_status(struct dm_target *ti, status_type_t type, - char *result, unsigned maxlen) + unsigned status_flags, char *result, unsigned maxlen) { struct raid_set *rs = ti->private; unsigned raid_param_cnt = 1; /* at least 1 for chunksize */ |