[PATCH net-next 2/2] selftests: netdevsim: add speed testing

[Hangbin Liu <hangbin.liu@linux.dev>]

From: Hangbin Liu <liuhangbin@kylinos.cn>

Add a script for netdevsim speed test. Make sure the speed and duplex
could be changed. And the speed can't be larger than the max speed.

Signed-off-by: Hangbin Liu <liuhangbin@kylinos.cn>
---
 .../selftests/drivers/net/netdevsim/Makefile       |  1 +
 .../drivers/net/netdevsim/ethtool-speed.sh         | 33 ++++++++++++++++++++++
 2 files changed, 34 insertions(+)

diff --git a/tools/testing/selftests/drivers/net/netdevsim/Makefile b/tools/testing/selftests/drivers/net/netdevsim/Makefile
index 9808c2fbae9e..bd3d0f5ee07a 100644
--- a/tools/testing/selftests/drivers/net/netdevsim/Makefile
+++ b/tools/testing/selftests/drivers/net/netdevsim/Makefile
@@ -8,6 +8,7 @@ TEST_PROGS := \
 	ethtool-features.sh \
 	ethtool-fec.sh \
 	ethtool-pause.sh \
+	ethtool-speed.sh \
 	fib.sh \
 	fib_notifications.sh \
 	hw_stats_l3.sh \
diff --git a/tools/testing/selftests/drivers/net/netdevsim/ethtool-speed.sh b/tools/testing/selftests/drivers/net/netdevsim/ethtool-speed.sh
new file mode 100755
index 000000000000..c8aefa9c8a1f
--- /dev/null
+++ b/tools/testing/selftests/drivers/net/netdevsim/ethtool-speed.sh
@@ -0,0 +1,33 @@
+#!/bin/bash
+# SPDX-License-Identifier: GPL-2.0-only
+
+source ethtool-common.sh
+
+NSIM_NETDEV=$(make_netdev)
+
+set -o pipefail
+
+s=$(ethtool --json "$NSIM_NETDEV" | jq '.[].speed')
+check $? "$s" "5000"
+
+s=$(ethtool --json "$NSIM_NETDEV" | jq -r '.[].duplex')
+check $? "$s" "Full"
+
+ethtool -s "$NSIM_NETDEV" speed 1000 duplex half
+
+s=$(ethtool --json "$NSIM_NETDEV" | jq '.[].speed')
+check $? "$s" "1000"
+
+s=$(ethtool --json "$NSIM_NETDEV" | jq -r '.[].duplex')
+check $? "$s" "Half"
+
+ethtool -s "$NSIM_NETDEV" speed 10000 2>/dev/null
+check $? "" "" 1
+
+if [ "$num_errors" -eq 0 ]; then
+    echo "PASSED all $((num_passes)) checks"
+    exit 0
+else
+    echo "FAILED $num_errors/$((num_errors+num_passes)) checks"
+    exit 1
+fi

-- 
2.55.0