From f999e8fe70bd0b8faa27ccdac14b5942999c6e78 Mon Sep 17 00:00:00 2001 From: Jonathan E Brassow Date: Fri, 27 Jul 2012 15:08:04 +0100 Subject: [PATCH] dm raid: restructure parse_raid_params In preparation for RAID10 addition to dm-raid, we change an 'if' conditional to a 'switch' conditional to make it easier to see what is being checked for each RAID type. Signed-off-by: Jonathan Brassow Signed-off-by: Alasdair G Kergon --- drivers/md/dm-raid.c | 25 ++++++++++++++++++++----- 1 file changed, 20 insertions(+), 5 deletions(-) diff --git a/drivers/md/dm-raid.c b/drivers/md/dm-raid.c index 858a8b7..1717ed3 100644 --- a/drivers/md/dm-raid.c +++ b/drivers/md/dm-raid.c @@ -430,13 +430,28 @@ 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; -- 2.7.4