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dm cache: return -EINVAL if the user specifies unknown cache policy 

Return -EINVAL when the specified cache policy is unknown rather than
returning -ENOMEM.

Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mikulas Patocka 2013-10-01 18:35:39 -04:00 committed by Mike Snitzer
parent dd8b0c2096
commit 4cb3e1db21
2 changed files with 9 additions and 8 deletions
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4
drivers/md/dm-cache-policy.c
View File

@ -119,13 +119,13 @@ struct dm_cache_policy *dm_cache_policy_create(const char *name,
type = get_policy(name);
if (!type) {
DMWARN("unknown policy type");
return NULL;
return ERR_PTR(-EINVAL);
}
p = type->create(cache_size, origin_size, cache_block_size);
if (!p) {
put_policy(type);
return NULL;
return ERR_PTR(-ENOMEM);
}
p->private = type;

13
drivers/md/dm-cache-target.c
View File

@ -1879,14 +1879,15 @@ static int set_config_values(struct cache *cache, int argc, const char **argv)
static int create_cache_policy(struct cache *cache, struct cache_args *ca,
char **error)
{
cache->policy = dm_cache_policy_create(ca->policy_name,
cache->cache_size,
cache->origin_sectors,
cache->sectors_per_block);
if (!cache->policy) {
struct dm_cache_policy *p = dm_cache_policy_create(ca->policy_name,
cache->cache_size,
cache->origin_sectors,
cache->sectors_per_block);
if (IS_ERR(p)) {
*error = "Error creating cache's policy";
return -ENOMEM;
return PTR_ERR(p);
}
cache->policy = p;
return 0;
}