[PATCH] selftests: add a generic testsuite for ethernet device

[Corentin Labbe <clabbe.montjoie@gmail.com>]

This patch add a generic testsuite for testing ethernet network device driver.

Signed-off-by: Corentin Labbe <clabbe.montjoie@gmail.com>
---
 tools/testing/selftests/net/Makefile     |   2 +-
 tools/testing/selftests/net/netdevice.sh | 185 +++++++++++++++++++++++++++++++
 2 files changed, 186 insertions(+), 1 deletion(-)
 create mode 100755 tools/testing/selftests/net/netdevice.sh

diff --git a/tools/testing/selftests/net/Makefile b/tools/testing/selftests/net/Makefile
index fbfe5d0..35cbb4c 100644
--- a/tools/testing/selftests/net/Makefile
+++ b/tools/testing/selftests/net/Makefile
@@ -5,7 +5,7 @@ CFLAGS += -I../../../../usr/include/
 
 reuseport_bpf_numa: LDFLAGS += -lnuma
 
-TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh
+TEST_PROGS := run_netsocktests run_afpackettests test_bpf.sh netdevice.sh
 TEST_GEN_FILES =  socket
 TEST_GEN_FILES += psock_fanout psock_tpacket
 TEST_GEN_FILES += reuseport_bpf reuseport_bpf_cpu reuseport_bpf_numa
diff --git a/tools/testing/selftests/net/netdevice.sh b/tools/testing/selftests/net/netdevice.sh
new file mode 100755
index 0000000..89ba827
--- /dev/null
+++ b/tools/testing/selftests/net/netdevice.sh
@@ -0,0 +1,185 @@
+#!/bin/sh
+#
+# This test is for checking network interface
+# For the moment it tests only ethernet interface (but wifi could be easily added)
+#
+# We assume that all network driver are loaded
+# if not they probably have failed earlier in the boot process and their logged error will be catched by another test
+#
+
+# this function will try to up the interface
+# if already up, nothing done
+# arg1: network interface name
+kci_net_start()
+{
+	netdev=$1
+
+	ip link show "$netdev" |grep -q UP
+	if [ $? -eq 0 ];then
+		echo "SKIP: interface $netdev already up"
+		return 0
+	fi
+
+	ip link set "$netdev" up
+	if [ $? -ne 0 ];then
+		echo "FAIL: Fail to up $netdev"
+		return 1
+	else
+		echo "PASS: set interface $netdev up"
+		NETDEV_STARTED=1
+	fi
+	return 0
+}
+
+# this function will try to setup an IP and MAC address on a network interface
+# Doing nothing if the interface was already up
+# arg1: network interface name
+kci_net_setup()
+{
+	netdev=$1
+
+	# do nothing if the interface was already up
+	if [ $NETDEV_STARTED -eq 0 ];then
+		return 0
+	fi
+
+	ip link set dev $netdev address 02:03:04:05:06:07
+	if [ $? -ne 0 ];then
+		echo "FAIL: Cannot set MAC address to $netdev"
+		return 1
+	fi
+	echo "PASS: set MAC address to $netdev"
+
+	#check that the interface did not already have an IP
+	ip address show "$netdev" |grep '^[[:space:]]*inet'
+	if [ $? -eq 0 ];then
+		echo "SKIP: $netdev already have an IP"
+		return 0
+	fi
+
+	# TODO what ipaddr to set ? DHCP ?
+	echo "SKIP: set IP address to $netdev"
+	return 0
+}
+
+# test an ethtool command
+# arg1: return code for not supported (see ethtool code source)
+# arg2: summary of the command
+# arg3: command to execute
+kci_netdev_ethtool_test()
+{
+	if [ $# -le 2 ];then
+		echo "SKIP: invalid number of arguments"
+		return 1
+	fi
+	$3 >/dev/null
+	ret=$?
+	if [ $ret -ne 0 ];then
+		if [ $ret -eq "$1" ];then
+			echo "SKIP: ethtool $2 $netdev not supported"
+		else
+			echo "FAIL: ethtool $2 $netdev"
+			return 1
+		fi
+	else
+		echo "PASS: ethtool $2 $netdev"
+	fi
+	return 0
+}
+
+# test ethtool commands
+# arg1: network interface name
+kci_netdev_ethtool()
+{
+	netdev=$1
+
+	#check presence of ethtool
+	ethtool --version 2>/dev/null >/dev/null
+	if [ $? -ne 0 ];then
+		echo "SKIP: ethtool not present"
+		return 1
+	fi
+
+	TMP_ETHTOOL_FEATURES="$(mktemp)"
+	if [ ! -e "$TMP_ETHTOOL_FEATURES" ];then
+		echo "SKIP: Cannot create a tmp file"
+		return 1
+	fi
+
+	ethtool -k "$netdev" > "$TMP_ETHTOOL_FEATURES"
+	if [ $? -ne 0 ];then
+		echo "FAIL: ethtool -k $netdev"
+		rm "$TMP_ETHTOOL_FEATURES"
+		return 1
+	fi
+	#TODO for each non fixed features, try to turn them on/off
+	rm "$TMP_ETHTOOL_FEATURES"
+
+	kci_netdev_ethtool_test 74 'dump' "ethtool -d $netdev"
+	kci_netdev_ethtool_test 94 'stats' "ethtool -S $netdev"
+	return 0
+}
+
+# stop a netdev
+# arg1: network interface name
+kci_netdev_stop()
+{
+	netdev=$1
+
+	if [ $NETDEV_STARTED -eq 0 ];then
+		echo "SKIP: interface $netdev kept up"
+		return 0
+	fi
+
+	ip link set "$netdev" down
+	if [ $? -ne 0 ];then
+		echo "FAIL: stop $netdev"
+		return 1
+	fi
+	echo "PASS: interface $netdev stop"
+	return 0
+}
+
+# run all test on a netdev
+# arg1: network interface name
+kci_test_netdev()
+{
+	netdev=$1
+
+	NETDEV_STARTED=0
+	kci_net_start "$netdev"
+
+	kci_net_setup "$netdev"
+
+	kci_netdev_ethtool "$netdev"
+
+	kci_netdev_stop "$netdev"
+	return 0
+}
+
+#check for needed privileges
+if [ "$(id -u)" -ne 0 ];then
+	echo "SKIP: Need root privileges"
+	exit 0
+fi
+
+ip -Version 2>/dev/null >/dev/null
+if [ $? -ne 0 ];then
+	echo "SKIP: Could not run test without the ip tool"
+	exit 0
+fi
+
+TMP_LIST_NETDEV="$(mktemp)"
+if [ ! -e "$TMP_LIST_NETDEV" ];then
+	echo "FAIL: Cannot create a tmp file"
+	exit 1
+fi
+
+ls /sys/class/net/ |grep -vE '^lo|^tun' | grep -E '^eth|enp[0-9]s[0-9]' > "$TMP_LIST_NETDEV"
+while read netdev
+do
+	kci_test_netdev "$netdev"
+done < "$TMP_LIST_NETDEV"
+
+rm "$TMP_LIST_NETDEV"
+exit 0
-- 
2.10.2