#!/bin/sh# SPDX-License-Identifier: GPL-2.0## 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# # Kselftest framework requirement - SKIP code is 4.ksft_skip=4 # this function will try to up the interface# if already up, nothing done# arg1: network interface namekci_net_start(){	netdev=$1 	ip link show "$netdev" |grep -q UP	if [ $? -eq 0 ];then		echo "SKIP: $netdev: interface already up"		return $ksft_skip	fi 	ip link set "$netdev" up	if [ $? -ne 0 ];then		echo "FAIL: $netdev: Fail to up interface"		return 1	else		echo "PASS: $netdev: set interface 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 namekci_net_setup(){	netdev=$1 	# do nothing if the interface was already up	if [ $NETDEV_STARTED -eq 0 ];then		return 0	fi 	MACADDR='02:03:04:05:06:07'	ip link set dev $netdev address "$MACADDR"	if [ $? -ne 0 ];then		echo "FAIL: $netdev: Cannot set MAC address"	else		ip link show $netdev |grep -q "$MACADDR"		if [ $? -eq 0 ];then			echo "PASS: $netdev: set MAC address"		else			echo "FAIL: $netdev: Cannot set MAC address"		fi	fi 	#check that the interface did not already have an IP	ip address show "$netdev" |grep '^[[:space:]]*inet'	if [ $? -eq 0 ];then		echo "SKIP: $netdev: already have an IP"		return $ksft_skip	fi 	if [ "$veth_created" ]; then		echo "XFAIL: $netdev: set IP address unsupported for veth*"	else		# TODO what ipaddr to set ? DHCP ?		echo "SKIP: $netdev: set IP address"	fi	return $ksft_skip} # test an ethtool command# arg1: return code for not supported (see ethtool code source)# arg2: summary of the command# arg3: command to executekci_netdev_ethtool_test(){	if [ $# -le 2 ];then		echo "SKIP: $netdev: ethtool: invalid number of arguments"		return 1	fi	$3 >/dev/null	ret=$?	if [ $ret -ne 0 ];then		if [ $ret -eq "$1" ];then			echo "XFAIL: $netdev: ethtool $2 not supported"			return $ksft_skip		else			echo "FAIL: $netdev: ethtool $2"			return 1		fi	else		echo "PASS: $netdev: ethtool $2"	fi	return 0} # test ethtool commands# arg1: network interface namekci_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 $ksft_skip	fi 	TMP_ETHTOOL_FEATURES="$(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: $netdev: ethtool list features"		rm "$TMP_ETHTOOL_FEATURES"		return 1	fi	echo "PASS: $netdev: ethtool list features" 	while read -r FEATURE VALUE FIXED; do		[ "$FEATURE" != "Features" ] || continue # Skip "Features"		[ "$FIXED" != "[fixed]" ] || continue # Skip fixed features		feature="${FEATURE%:*}" 		ethtool --offload "$netdev" "$feature" off		if [ $? -eq 0 ]; then			echo "PASS: $netdev: Turned off feature: $feature"		else			echo "FAIL: $netdev: Failed to turn off feature:" \				"$feature"		fi 		ethtool --offload "$netdev" "$feature" on		if [ $? -eq 0 ]; then			echo "PASS: $netdev: Turned on feature: $feature"		else			echo "FAIL: $netdev: Failed to turn on feature:" \				"$feature"		fi 		#restore the feature to its initial state		ethtool --offload "$netdev" "$feature" "$VALUE"		if [ $? -eq 0 ]; then			echo "PASS: $netdev: Restore feature $feature" \				"to initial state $VALUE"		else			echo "FAIL: $netdev: Failed to restore feature" \				"$feature to initial state $VALUE"		fi 	done < "$TMP_ETHTOOL_FEATURES" 	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 namekci_netdev_stop(){	netdev=$1 	if [ $NETDEV_STARTED -eq 0 ];then		echo "SKIP: $netdev: interface kept up"		return 0	fi 	ip link set "$netdev" down	if [ $? -ne 0 ];then		echo "FAIL: $netdev: stop interface"		return 1	fi	echo "PASS: $netdev: stop interface"	return 0} # run all test on a netdev# arg1: network interface namekci_test_netdev(){	NETDEV_STARTED=0	IFACE_TO_UPDOWN="$1"	IFACE_TO_TEST="$1"	#check for VLAN interface	MASTER_IFACE="$(echo $1 | cut -d@ -f2)"	if [ ! -z "$MASTER_IFACE" ];then		IFACE_TO_UPDOWN="$MASTER_IFACE"		IFACE_TO_TEST="$(echo $1 | cut -d@ -f1)"	fi 	NETDEV_STARTED=0	kci_net_start "$IFACE_TO_UPDOWN" 	kci_net_setup "$IFACE_TO_TEST" 	kci_netdev_ethtool "$IFACE_TO_TEST" 	kci_netdev_stop "$IFACE_TO_UPDOWN"	return 0} #check for needed privilegesif [ "$(id -u)" -ne 0 ];then	echo "SKIP: Need root privileges"	exit $ksft_skipfi ip link show 2>/dev/null >/dev/nullif [ $? -ne 0 ];then	echo "SKIP: Could not run test without the ip tool"	exit $ksft_skipfi TMP_LIST_NETDEV="$(mktemp)"if [ ! -e "$TMP_LIST_NETDEV" ];then	echo "FAIL: Cannot create a tmp file"	exit 1fi ip link show |grep '^[0-9]' | grep -oE '[[:space:]].*eth[0-9]*:|[[:space:]].*enp[0-9]s[0-9]:' | cut -d\  -f2 | cut -d: -f1> "$TMP_LIST_NETDEV" if [ ! -s "$TMP_LIST_NETDEV" ]; then	echo "No valid network device found, creating veth pair"	ip link add veth0 type veth peer name veth1	echo "veth0" > "$TMP_LIST_NETDEV"	veth_created=1fi while read netdevdo	kci_test_netdev "$netdev"done < "$TMP_LIST_NETDEV" #clean up veth interface pair if it was createdif [ "$veth_created" ]; then	ip link delete veth0	echo "Removed veth pair"fi rm "$TMP_LIST_NETDEV"exit 0