[RFC PATCH dlm/next 3/4] dlm: reject SCTP configuration if not enabled

[Alexander Aring <aahringo@redhat.com>]

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>
---
 fs/dlm/config.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/fs/dlm/config.c b/fs/dlm/config.c
index cf9ba6fd7a28..a23fd524a6ee 100644
--- 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;
-- 
2.43.0