From: Alexander Aring <aahringo@redhat.com>
Date: Tue, 29 Apr 2025 20:29:12 +0000 (-0400)
Subject: dlm: reject SCTP configuration if not enabled
X-Git-Url: https://www.infradead.org/git/?a=commitdiff_plain;h=574511615a2e17e5dfe4754f6e9cea005b6c718a;p=users%2Fwilly%2Flinux.git

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 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;