Subject: [PATCH net-next 3/4] selftests/netconsole: Switch to configfs send_msg interface

From: Breno Leitao <[email-masked]>
Date: Fri, 28 Nov 2025 06:20:48 -0800

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 <[email-masked]>
---
 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