dlm: make tcp still work in multi-link env

zhaohem · teigland · commit 03d2b62208a3 · 2025-03-18T10:49:22.000-05:00
This patch bypasses multi-link errors in TCP mode, allowing dlm
to operate on the first tcp link.

Signed-off-by: Heming Zhao &lt;heming.zhao@suse.com&gt;
Signed-off-by: David Teigland &lt;teigland@redhat.com&gt;
diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
@@ -1826,8 +1826,8 @@ static int dlm_tcp_listen_validate(void)
 {
 	/* We don't support multi-homed hosts */
 	if (dlm_local_count > 1) {
-		log_print("TCP protocol can't handle multi-homed hosts, try SCTP");
-		return -EINVAL;
+		log_print("Detect multi-homed hosts but use only the first IP address.");
+		log_print("Try SCTP, if you want to enable multi-link.");
 	}
 
 	return 0;

Original file line number	Diff line number	Diff line change
`@@ -1826,8 +1826,8 @@ static int dlm_tcp_listen_validate(void)`
`1826`	`1826`	`{`
`1827`	`1827`	`/* We don't support multi-homed hosts */`
`1828`	`1828`	`if (dlm_local_count > 1) {`
`1829`		`- log_print("TCP protocol can't handle multi-homed hosts, try SCTP");`
`1830`		`- return -EINVAL;`
	`1829`	`+ log_print("Detect multi-homed hosts but use only the first IP address.");`
	`1830`	`+ log_print("Try SCTP, if you want to enable multi-link.");`
`1831`	`1831`	`}`
`1832`	`1832`
`1833`	`1833`	`return 0;`