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dm thin: fail messages with EOPNOTSUPP when pool cannot handle messages 

Use EOPNOTSUPP, rather than EINVAL, error code when user attempts to
send the pool a message.  Otherwise usespace is led to believe the
message failed due to invalid argument.

Reported-by: Zdenek Kabelac <zkabelac@redhat.com>
Signed-off-by: Mike Snitzer <snitzer@redhat.com>
This commit is contained in:
Mike Snitzer 2015-06-09 12:31:26 -04:00
parent 34fbcf6257
commit fd467696e8
1 changed files with 1 additions and 1 deletions
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2
drivers/md/dm-thin.c
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@ -3656,7 +3656,7 @@ static int pool_message(struct dm_target *ti, unsigned argc, char **argv)
if (get_pool_mode(pool) >= PM_READ_ONLY) {
DMERR("%s: unable to service pool target messages in READ_ONLY or FAIL mode",
dm_device_name(pool->pool_md));
return -EINVAL;
return -EOPNOTSUPP;
}
if (!strcasecmp(argv[0], "create_thin"))