selftests/net/drop_monitor_tests.sh

0001 #!/bin/bash
0002 # SPDX-License-Identifier: GPL-2.0
0003
0004 # This test is for checking drop monitor functionality.
0005
0006 ret=0
0007 # Kselftest framework requirement - SKIP code is 4.
0008 ksft_skip=4
0009
0010 # all tests in this script. Can be overridden with -t option
0011 TESTS="
0012         sw_drops
0013         hw_drops
0014 "
0015
0016 IP="ip -netns ns1"
0017 TC="tc -netns ns1"
0018 DEVLINK="devlink -N ns1"
0019 NS_EXEC="ip netns exec ns1"
0020 NETDEVSIM_PATH=/sys/bus/netdevsim/
0021 DEV_ADDR=1337
0022 DEV=netdevsim${DEV_ADDR}
0023 DEVLINK_DEV=netdevsim/${DEV}
0024
0025 log_test()
0026 {
0027         local rc=$1
0028         local expected=$2
0029         local msg="$3"
0030
0031         if [ ${rc} -eq ${expected} ]; then
0032                 printf "    TEST: %-60s  [ OK ]\n" "${msg}"
0033                 nsuccess=$((nsuccess+1))
0034         else
0035                 ret=1
0036                 nfail=$((nfail+1))
0037                 printf "    TEST: %-60s  [FAIL]\n" "${msg}"
0038         fi
0039 }
0040
0041 setup()
0042 {
0043         modprobe netdevsim &> /dev/null
0044
0045         set -e
0046         ip netns add ns1
0047         $IP link add dummy10 up type dummy
0048
0049         $NS_EXEC echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device
0050         udevadm settle
0051         local netdev=$($NS_EXEC ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
0052         $IP link set dev $netdev up
0053
0054         set +e
0055 }
0056
0057 cleanup()
0058 {
0059         $NS_EXEC echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
0060         ip netns del ns1
0061 }
0062
0063 sw_drops_test()
0064 {
0065         echo
0066         echo "Software drops test"
0067
0068         setup
0069
0070         local dir=$(mktemp -d)
0071
0072         $TC qdisc add dev dummy10 clsact
0073         $TC filter add dev dummy10 egress pref 1 handle 101 proto ip \
0074                 flower dst_ip 192.0.2.10 action drop
0075
0076         $NS_EXEC mausezahn dummy10 -a 00:11:22:33:44:55 -b 00:aa:bb:cc:dd:ee \
0077                 -A 192.0.2.1 -B 192.0.2.10 -t udp sp=12345,dp=54321 -c 0 -q \
0078                 -d 100msec &
0079         timeout 5 dwdump -o sw -w ${dir}/packets.pcap
0080         (( $(tshark -r ${dir}/packets.pcap \
0081                 -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) != 0))
0082         log_test $? 0 "Capturing active software drops"
0083
0084         rm ${dir}/packets.pcap
0085
0086         { kill %% && wait %%; } 2>/dev/null
0087         timeout 5 dwdump -o sw -w ${dir}/packets.pcap
0088         (( $(tshark -r ${dir}/packets.pcap \
0089                 -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) == 0))
0090         log_test $? 0 "Capturing inactive software drops"
0091
0092         rm -r $dir
0093
0094         cleanup
0095 }
0096
0097 hw_drops_test()
0098 {
0099         echo
0100         echo "Hardware drops test"
0101
0102         setup
0103
0104         local dir=$(mktemp -d)
0105
0106         $DEVLINK trap set $DEVLINK_DEV trap blackhole_route action trap
0107         timeout 5 dwdump -o hw -w ${dir}/packets.pcap
0108         (( $(tshark -r ${dir}/packets.pcap \
0109                 -Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
0110                 | wc -l) != 0))
0111         log_test $? 0 "Capturing active hardware drops"
0112
0113         rm ${dir}/packets.pcap
0114
0115         $DEVLINK trap set $DEVLINK_DEV trap blackhole_route action drop
0116         timeout 5 dwdump -o hw -w ${dir}/packets.pcap
0117         (( $(tshark -r ${dir}/packets.pcap \
0118                 -Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
0119                 | wc -l) == 0))
0120         log_test $? 0 "Capturing inactive hardware drops"
0121
0122         rm -r $dir
0123
0124         cleanup
0125 }
0126
0127 ################################################################################
0128 # usage
0129
0130 usage()
0131 {
0132         cat <<EOF
0133 usage: ${0##*/} OPTS
0134
0135         -t <test>   Test(s) to run (default: all)
0136                     (options: $TESTS)
0137 EOF
0138 }
0139
0140 ################################################################################
0141 # main
0142
0143 while getopts ":t:h" opt; do
0144         case $opt in
0145                 t) TESTS=$OPTARG;;
0146                 h) usage; exit 0;;
0147                 *) usage; exit 1;;
0148         esac
0149 done
0150
0151 if [ "$(id -u)" -ne 0 ];then
0152         echo "SKIP: Need root privileges"
0153         exit $ksft_skip;
0154 fi
0155
0156 if [ ! -x "$(command -v ip)" ]; then
0157         echo "SKIP: Could not run test without ip tool"
0158         exit $ksft_skip
0159 fi
0160
0161 if [ ! -x "$(command -v devlink)" ]; then
0162         echo "SKIP: Could not run test without devlink tool"
0163         exit $ksft_skip
0164 fi
0165
0166 if [ ! -x "$(command -v tshark)" ]; then
0167         echo "SKIP: Could not run test without tshark tool"
0168         exit $ksft_skip
0169 fi
0170
0171 if [ ! -x "$(command -v dwdump)" ]; then
0172         echo "SKIP: Could not run test without dwdump tool"
0173         exit $ksft_skip
0174 fi
0175
0176 if [ ! -x "$(command -v udevadm)" ]; then
0177         echo "SKIP: Could not run test without udevadm tool"
0178         exit $ksft_skip
0179 fi
0180
0181 if [ ! -x "$(command -v timeout)" ]; then
0182         echo "SKIP: Could not run test without timeout tool"
0183         exit $ksft_skip
0184 fi
0185
0186 if [ ! -x "$(command -v mausezahn)" ]; then
0187         echo "SKIP: Could not run test without mausezahn tool"
0188         exit $ksft_skip
0189 fi
0190
0191 tshark -G fields 2> /dev/null | grep -q net_dm
0192 if [ $? -ne 0 ]; then
0193         echo "SKIP: tshark too old, missing net_dm dissector"
0194         exit $ksft_skip
0195 fi
0196
0197 # start clean
0198 cleanup &> /dev/null
0199
0200 for t in $TESTS
0201 do
0202         case $t in
0203         sw_drops|sw)                    sw_drops_test;;
0204         hw_drops|hw)                    hw_drops_test;;
0205
0206         help) echo "Test names: $TESTS"; exit 0;;
0207         esac
0208 done
0209
0210 if [ "$TESTS" != "none" ]; then
0211         printf "\nTests passed: %3d\n" ${nsuccess}
0212         printf "Tests failed: %3d\n"   ${nfail}
0213 fi
0214
0215 exit $ret