#!/bin/bash
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# SPDX-License-Identifier: GPL-2.0
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# This test is for checking drop monitor functionality.
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ret=0
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# Kselftest framework requirement - SKIP code is 4.
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ksft_skip=4
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# all tests in this script. Can be overridden with -t option
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TESTS="
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sw_drops
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hw_drops
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"
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IP="ip -netns ns1"
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TC="tc -netns ns1"
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DEVLINK="devlink -N ns1"
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NS_EXEC="ip netns exec ns1"
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NETDEVSIM_PATH=/sys/bus/netdevsim/
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DEV_ADDR=1337
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DEV=netdevsim${DEV_ADDR}
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DEVLINK_DEV=netdevsim/${DEV}
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log_test()
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{
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local rc=$1
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local expected=$2
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local msg="$3"
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if [ ${rc} -eq ${expected} ]; then
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printf " TEST: %-60s [ OK ]\n" "${msg}"
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nsuccess=$((nsuccess+1))
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else
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ret=1
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nfail=$((nfail+1))
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printf " TEST: %-60s [FAIL]\n" "${msg}"
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fi
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}
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setup()
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{
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modprobe netdevsim &> /dev/null
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set -e
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ip netns add ns1
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$IP link add dummy10 up type dummy
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$NS_EXEC echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device
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udevadm settle
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local netdev=$($NS_EXEC ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
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$IP link set dev $netdev up
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set +e
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}
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cleanup()
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{
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$NS_EXEC echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
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ip netns del ns1
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}
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sw_drops_test()
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{
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echo
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echo "Software drops test"
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setup
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local dir=$(mktemp -d)
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$TC qdisc add dev dummy10 clsact
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$TC filter add dev dummy10 egress pref 1 handle 101 proto ip \
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flower dst_ip 192.0.2.10 action drop
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$NS_EXEC mausezahn dummy10 -a 00:11:22:33:44:55 -b 00:aa:bb:cc:dd:ee \
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-A 192.0.2.1 -B 192.0.2.10 -t udp sp=12345,dp=54321 -c 0 -q \
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-d 100msec &
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timeout 5 dwdump -o sw -w ${dir}/packets.pcap
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(( $(tshark -r ${dir}/packets.pcap \
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-Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) != 0))
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log_test $? 0 "Capturing active software drops"
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rm ${dir}/packets.pcap
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{ kill %% && wait %%; } 2>/dev/null
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timeout 5 dwdump -o sw -w ${dir}/packets.pcap
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(( $(tshark -r ${dir}/packets.pcap \
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-Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) == 0))
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log_test $? 0 "Capturing inactive software drops"
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rm -r $dir
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cleanup
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}
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hw_drops_test()
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{
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echo
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echo "Hardware drops test"
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setup
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local dir=$(mktemp -d)
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$DEVLINK trap set $DEVLINK_DEV trap blackhole_route action trap
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timeout 5 dwdump -o hw -w ${dir}/packets.pcap
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(( $(tshark -r ${dir}/packets.pcap \
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-Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
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| wc -l) != 0))
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log_test $? 0 "Capturing active hardware drops"
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rm ${dir}/packets.pcap
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$DEVLINK trap set $DEVLINK_DEV trap blackhole_route action drop
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timeout 5 dwdump -o hw -w ${dir}/packets.pcap
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(( $(tshark -r ${dir}/packets.pcap \
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-Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
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| wc -l) == 0))
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log_test $? 0 "Capturing inactive hardware drops"
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rm -r $dir
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cleanup
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}
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################################################################################
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# usage
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usage()
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{
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cat <<EOF
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usage: ${0##*/} OPTS
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-t <test> Test(s) to run (default: all)
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(options: $TESTS)
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EOF
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}
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################################################################################
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# main
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while getopts ":t:h" opt; do
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case $opt in
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t) TESTS=$OPTARG;;
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h) usage; exit 0;;
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*) usage; exit 1;;
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esac
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done
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if [ "$(id -u)" -ne 0 ];then
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echo "SKIP: Need root privileges"
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exit $ksft_skip;
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fi
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if [ ! -x "$(command -v ip)" ]; then
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echo "SKIP: Could not run test without ip tool"
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exit $ksft_skip
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fi
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if [ ! -x "$(command -v devlink)" ]; then
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echo "SKIP: Could not run test without devlink tool"
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exit $ksft_skip
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fi
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if [ ! -x "$(command -v tshark)" ]; then
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echo "SKIP: Could not run test without tshark tool"
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exit $ksft_skip
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fi
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if [ ! -x "$(command -v dwdump)" ]; then
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echo "SKIP: Could not run test without dwdump tool"
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exit $ksft_skip
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fi
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if [ ! -x "$(command -v udevadm)" ]; then
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echo "SKIP: Could not run test without udevadm tool"
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exit $ksft_skip
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fi
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if [ ! -x "$(command -v timeout)" ]; then
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echo "SKIP: Could not run test without timeout tool"
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exit $ksft_skip
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fi
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if [ ! -x "$(command -v mausezahn)" ]; then
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echo "SKIP: Could not run test without mausezahn tool"
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exit $ksft_skip
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fi
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tshark -G fields 2> /dev/null | grep -q net_dm
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if [ $? -ne 0 ]; then
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echo "SKIP: tshark too old, missing net_dm dissector"
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exit $ksft_skip
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fi
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# start clean
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cleanup &> /dev/null
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for t in $TESTS
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do
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case $t in
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sw_drops|sw) sw_drops_test;;
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hw_drops|hw) hw_drops_test;;
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help) echo "Test names: $TESTS"; exit 0;;
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esac
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done
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if [ "$TESTS" != "none" ]; then
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printf "\nTests passed: %3d\n" ${nsuccess}
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printf "Tests failed: %3d\n" ${nfail}
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fi
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exit $ret
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