netdev - [PATCH net-next 3/4] selftests/netconsole: Switch to configfs send

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Message-Id: <20251128-netconsole_send_msg-v1-3-8cca4bbce9bc@debian.org>
Date: Fri, 28 Nov 2025 06:20:48 -0800
From: Breno Leitao <leitao@...ian.org>
To: Breno Leitao <leitao@...ian.org>, Andrew Lunn <andrew+netdev@...n.ch>, 
 "David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>, 
 Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>, 
 Shuah Khan <shuah@...nel.org>, Simon Horman <horms@...nel.org>, 
 Jonathan Corbet <corbet@....net>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org, 
 linux-kselftest@...r.kernel.org, linux-doc@...r.kernel.org, 
 gustavold@...il.com, asantostc@...il.com, calvin@...nvd.org, 
 kernel-team@...a.com
Subject: [PATCH net-next 3/4] selftests/netconsole: Switch to configfs
 send_msg interface

Update the netcons_sysdata test to use the configfs send_msg
attribute for message injection instead of /dev/kmsg. This
validates the new direct message sending functionality that
bypasses the kernel's printk infrastructure.

Only move this test to the new mechanism, given the traditional printk()
flow continues to be default path, and the one that should be mostly
tested.

Signed-off-by: Breno Leitao <leitao@...ian.org>
---
 tools/testing/selftests/drivers/net/netcons_sysdata.sh | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tools/testing/selftests/drivers/net/netcons_sysdata.sh b/tools/testing/selftests/drivers/net/netcons_sysdata.sh
index baf69031089e..27df730dc8f3 100755
--- a/tools/testing/selftests/drivers/net/netcons_sysdata.sh
+++ b/tools/testing/selftests/drivers/net/netcons_sysdata.sh
@@ -195,7 +195,7 @@ function runtest {
 	# Wait for socat to start and listen to the port.
 	wait_local_port_listen "${NAMESPACE}" "${PORT}" udp
 	# Send the message
-	taskset -c "${CPU}" echo "${MSG}: ${TARGET}" > /dev/kmsg
+	taskset -c "${CPU}" echo "${MSG}: ${TARGET}" > "$NETCONS_PATH"/send_msg
 	# Wait until socat saves the file to disk
 	busywait "${BUSYWAIT_TIMEOUT}" test -s "${OUTPUT_FILE}"
 }

-- 
2.47.3