selftests: net: Add drop monitor test (b7cc6d3c) · Commits · 戴 / test

tools/testing/selftests/net/Makefile

+1 −0

Original line number	Diff line number	Diff line
		@@ -19,6 +19,7 @@ TEST_PROGS += txtimestamp.sh
		TEST_PROGS += vrf-xfrm-tests.sh
		TEST_PROGS += rxtimestamp.sh
		TEST_PROGS += devlink_port_split.py
		TEST_PROGS += drop_monitor_tests.sh
		TEST_PROGS_EXTENDED := in_netns.sh
		TEST_GEN_FILES = socket nettest
		TEST_GEN_FILES += psock_fanout psock_tpacket msg_zerocopy reuseport_addr_any

tools/testing/selftests/net/config

+3 −0

Original line number	Diff line number	Diff line
		@@ -30,3 +30,6 @@ CONFIG_NET_SCH_ETF=m
		CONFIG_NET_SCH_NETEM=y
		CONFIG_TEST_BLACKHOLE_DEV=m
		CONFIG_KALLSYMS=y
		CONFIG_TRACEPOINTS=y
		CONFIG_NET_DROP_MONITOR=m
		CONFIG_NETDEVSIM=m

tools/testing/selftests/net/drop_monitor_tests.sh

0 → 100755

+215 −0

Original line number	Diff line number	Diff line
		#!/bin/bash
		# SPDX-License-Identifier: GPL-2.0

		# This test is for checking drop monitor functionality.

		ret=0
		# Kselftest framework requirement - SKIP code is 4.
		ksft_skip=4

		# all tests in this script. Can be overridden with -t option
		TESTS="
		sw_drops
		hw_drops
		"

		IP="ip -netns ns1"
		TC="tc -netns ns1"
		DEVLINK="devlink -N ns1"
		NS_EXEC="ip netns exec ns1"
		NETDEVSIM_PATH=/sys/bus/netdevsim/
		DEV_ADDR=1337
		DEV=netdevsim${DEV_ADDR}
		DEVLINK_DEV=netdevsim/${DEV}

		log_test()
		{
		local rc=$1
		local expected=$2
		local msg="$3"

		if [ ${rc} -eq ${expected} ]; then
		printf " TEST: %-60s [ OK ]\n" "${msg}"
		nsuccess=$((nsuccess+1))
		else
		ret=1
		nfail=$((nfail+1))
		printf " TEST: %-60s [FAIL]\n" "${msg}"
		fi
		}

		setup()
		{
		modprobe netdevsim &> /dev/null

		set -e
		ip netns add ns1
		$IP link add dummy10 up type dummy

		$NS_EXEC echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device
		udevadm settle
		local netdev=$($NS_EXEC ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
		$IP link set dev $netdev up

		set +e
		}

		cleanup()
		{
		$NS_EXEC echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
		ip netns del ns1
		}

		sw_drops_test()
		{
		echo
		echo "Software drops test"

		setup

		local dir=$(mktemp -d)

		$TC qdisc add dev dummy10 clsact
		$TC filter add dev dummy10 egress pref 1 handle 101 proto ip \
		flower dst_ip 192.0.2.10 action drop

		$NS_EXEC mausezahn dummy10 -a 00:11:22:33:44:55 -b 00:aa:bb:cc:dd:ee \
		-A 192.0.2.1 -B 192.0.2.10 -t udp sp=12345,dp=54321 -c 0 -q \
		-d 100msec &
		timeout 5 dwdump -o sw -w ${dir}/packets.pcap
		(( $(tshark -r ${dir}/packets.pcap \
		-Y 'ip.dst == 192.0.2.10' 2> /dev/null \| wc -l) != 0))
		log_test $? 0 "Capturing active software drops"

		rm ${dir}/packets.pcap

		{ kill %% && wait %%; } 2>/dev/null
		timeout 5 dwdump -o sw -w ${dir}/packets.pcap
		(( $(tshark -r ${dir}/packets.pcap \
		-Y 'ip.dst == 192.0.2.10' 2> /dev/null \| wc -l) == 0))
		log_test $? 0 "Capturing inactive software drops"

		rm -r $dir

		cleanup
		}

		hw_drops_test()
		{
		echo
		echo "Hardware drops test"

		setup

		local dir=$(mktemp -d)

		$DEVLINK trap set $DEVLINK_DEV trap blackhole_route action trap
		timeout 5 dwdump -o hw -w ${dir}/packets.pcap
		(( $(tshark -r ${dir}/packets.pcap \
		-Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
		\| wc -l) != 0))
		log_test $? 0 "Capturing active hardware drops"

		rm ${dir}/packets.pcap

		$DEVLINK trap set $DEVLINK_DEV trap blackhole_route action drop
		timeout 5 dwdump -o hw -w ${dir}/packets.pcap
		(( $(tshark -r ${dir}/packets.pcap \
		-Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
		\| wc -l) == 0))
		log_test $? 0 "Capturing inactive hardware drops"

		rm -r $dir

		cleanup
		}

		################################################################################
		# usage

		usage()
		{
		cat <<EOF
		usage: ${0##*/} OPTS

		-t <test> Test(s) to run (default: all)
		(options: $TESTS)
		EOF
		}

		################################################################################
		# main

		while getopts ":t:h" opt; do
		case $opt in
		t) TESTS=$OPTARG;;
		h) usage; exit 0;;
		*) usage; exit 1;;
		esac
		done

		if [ "$(id -u)" -ne 0 ];then
		echo "SKIP: Need root privileges"
		exit $ksft_skip;
		fi

		if [ ! -x "$(command -v ip)" ]; then
		echo "SKIP: Could not run test without ip tool"
		exit $ksft_skip
		fi

		if [ ! -x "$(command -v devlink)" ]; then
		echo "SKIP: Could not run test without devlink tool"
		exit $ksft_skip
		fi

		if [ ! -x "$(command -v tshark)" ]; then
		echo "SKIP: Could not run test without tshark tool"
		exit $ksft_skip
		fi

		if [ ! -x "$(command -v dwdump)" ]; then
		echo "SKIP: Could not run test without dwdump tool"
		exit $ksft_skip
		fi

		if [ ! -x "$(command -v udevadm)" ]; then
		echo "SKIP: Could not run test without udevadm tool"
		exit $ksft_skip
		fi

		if [ ! -x "$(command -v timeout)" ]; then
		echo "SKIP: Could not run test without timeout tool"
		exit $ksft_skip
		fi

		if [ ! -x "$(command -v mausezahn)" ]; then
		echo "SKIP: Could not run test without mausezahn tool"
		exit $ksft_skip
		fi

		tshark -G fields 2> /dev/null \| grep -q net_dm
		if [ $? -ne 0 ]; then
		echo "SKIP: tshark too old, missing net_dm dissector"
		exit $ksft_skip
		fi

		# start clean
		cleanup &> /dev/null

		for t in $TESTS
		do
		case $t in
		sw_drops\|sw) sw_drops_test;;
		hw_drops\|hw) hw_drops_test;;

		help) echo "Test names: $TESTS"; exit 0;;
		esac
		done

		if [ "$TESTS" != "none" ]; then
		printf "\nTests passed: %3d\n" ${nsuccess}
		printf "Tests failed: %3d\n" ${nfail}
		fi

		exit $ret

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