@@ -1025,7 +1025,7 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as,
{
int value, raid10_format = ALGORITHM_RAID10_DEFAULT;
unsigned raid10_copies = 2;
- unsigned i;
+ unsigned i, write_mostly = 0;
unsigned region_size = 0;
sector_t max_io_len;
const char *arg, *key;
@@ -1179,6 +1179,7 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as,
return -EINVAL;
}
+ write_mostly++;
set_bit(WriteMostly, &rs->dev[value].rdev.flags);
set_bit(__CTR_FLAG_WRITE_MOSTLY, &rs->ctr_flags);
} else if (!strcasecmp(key, dm_raid_arg_name_by_flag(CTR_FLAG_MAX_WRITE_BEHIND))) {
@@ -1303,6 +1304,11 @@ static int parse_raid_params(struct raid_set *rs, struct dm_arg_set *as,
return -EINVAL;
}
+ if (write_mostly >= rs->md.raid_disks) {
+ rs->ti->error = "Can't set all raid1 devices to write_mostly";
+ return -EINVAL;
+ }
+
if (validate_region_size(rs, region_size))
return -EINVAL;