linux-kernel - [PATCH AUTOSEL 6.12 087/486] dlm: make tcp still work in multi-link env

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Message-Id: <20250505223922.2682012-87-sashal@kernel.org>
Date: Mon,  5 May 2025 18:32:43 -0400
From: Sasha Levin <sashal@...nel.org>
To: linux-kernel@...r.kernel.org,
	stable@...r.kernel.org
Cc: Heming Zhao <heming.zhao@...e.com>,
	David Teigland <teigland@...hat.com>,
	Sasha Levin <sashal@...nel.org>,
	aahringo@...hat.com,
	gfs2@...ts.linux.dev
Subject: [PATCH AUTOSEL 6.12 087/486] dlm: make tcp still work in multi-link env

From: Heming Zhao <heming.zhao@...e.com>

[ Upstream commit 03d2b62208a336a3bb984b9465ef6d89a046ea22 ]

This patch bypasses multi-link errors in TCP mode, allowing dlm
to operate on the first tcp link.

Signed-off-by: Heming Zhao <heming.zhao@...e.com>
Signed-off-by: David Teigland <teigland@...hat.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 fs/dlm/lowcomms.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/dlm/lowcomms.c b/fs/dlm/lowcomms.c
index f2d88a3581695..10461451185e8 100644
--- 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;
-- 
2.39.5