dlm: reject SCTP configuration if not enabled

Reject SCTP dlm configuration if the kernel was never build with SCTP.
Currently the only one known user space tool "dlm_controld" will drop an
error in the logs and getting stuck. This behaviour should be fixed to
deliver an error to the user or fallback to TCP.

Signed-off-by: Alexander Aring <aahringo@redhat.com>
Reviewed-by: Heming zhao <heming.zhao@suse.com>
Signed-off-by: David Teigland <teigland@redhat.com>

diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index cf9ba6fd7a281f75b6da3487e52b9f47cda33155..a23fd524a6ee35a686d1b0ac385036c668159a38 100644 (file)
--- a/fs/dlm/config.c
+++ b/fs/dlm/config.c
@@ -197,6 +197,9 @@ static int dlm_check_protocol_and_dlm_running(unsigned int x)
                break;
        case 1:
                /* SCTP */
+               if (!IS_ENABLED(CONFIG_IP_SCTP))
+                       return -EOPNOTSUPP;
+
                break;
        default:
                return -EINVAL;