tools/testing/selftests/net/drop_monitor_tests.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # This test is for checking drop monitor functionality.
   5 source lib.sh
   6 ret=0
   7
   8 # all tests in this script. Can be overridden with -t option
   9 TESTS="
  10         sw_drops
  11         hw_drops
  12 "
  13
  14 NETDEVSIM_PATH=/sys/bus/netdevsim/
  15 DEV_ADDR=1337
  16 DEV=netdevsim${DEV_ADDR}
  17 DEVLINK_DEV=netdevsim/${DEV}
  18
  19 log_test()
  20 {
  21         local rc=$1
  22         local expected=$2
  23         local msg="$3"
  24
  25         if [ ${rc} -eq ${expected} ]; then
  26                 printf "    TEST: %-60s  [ OK ]\n" "${msg}"
  27                 nsuccess=$((nsuccess+1))
  28         else
  29                 ret=1
  30                 nfail=$((nfail+1))
  31                 printf "    TEST: %-60s  [FAIL]\n" "${msg}"
  32         fi
  33 }
  34
  35 setup()
  36 {
  37         modprobe netdevsim &> /dev/null
  38
  39         set -e
  40         setup_ns NS1
  41         $IP link add dummy10 up type dummy
  42
  43         $NS_EXEC echo "$DEV_ADDR 1" > ${NETDEVSIM_PATH}/new_device
  44         udevadm settle
  45         local netdev=$($NS_EXEC ls ${NETDEVSIM_PATH}/devices/${DEV}/net/)
  46         $IP link set dev $netdev up
  47
  48         set +e
  49 }
  50
  51 cleanup()
  52 {
  53         $NS_EXEC echo "$DEV_ADDR" > ${NETDEVSIM_PATH}/del_device
  54         cleanup_ns ${NS1}
  55 }
  56
  57 sw_drops_test()
  58 {
  59         echo
  60         echo "Software drops test"
  61
  62         setup
  63
  64         local dir=$(mktemp -d)
  65
  66         $TC qdisc add dev dummy10 clsact
  67         $TC filter add dev dummy10 egress pref 1 handle 101 proto ip \
  68                 flower dst_ip 192.0.2.10 action drop
  69
  70         $NS_EXEC mausezahn dummy10 -a 00:11:22:33:44:55 -b 00:aa:bb:cc:dd:ee \
  71                 -A 192.0.2.1 -B 192.0.2.10 -t udp sp=12345,dp=54321 -c 0 -q \
  72                 -d 100msec &
  73         timeout 5 dwdump -o sw -w ${dir}/packets.pcap
  74         (( $(tshark -r ${dir}/packets.pcap \
  75                 -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) != 0))
  76         log_test $? 0 "Capturing active software drops"
  77
  78         rm ${dir}/packets.pcap
  79
  80         kill_process %%
  81         timeout 5 dwdump -o sw -w ${dir}/packets.pcap
  82         (( $(tshark -r ${dir}/packets.pcap \
  83                 -Y 'ip.dst == 192.0.2.10' 2> /dev/null | wc -l) == 0))
  84         log_test $? 0 "Capturing inactive software drops"
  85
  86         rm -r $dir
  87
  88         cleanup
  89 }
  90
  91 hw_drops_test()
  92 {
  93         echo
  94         echo "Hardware drops test"
  95
  96         setup
  97
  98         local dir=$(mktemp -d)
  99
 100         $DEVLINK trap set $DEVLINK_DEV trap blackhole_route action trap
 101         timeout 5 dwdump -o hw -w ${dir}/packets.pcap
 102         (( $(tshark -r ${dir}/packets.pcap \
 103                 -Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
 104                 | wc -l) != 0))
 105         log_test $? 0 "Capturing active hardware drops"
 106
 107         rm ${dir}/packets.pcap
 108
 109         $DEVLINK trap set $DEVLINK_DEV trap blackhole_route action drop
 110         timeout 5 dwdump -o hw -w ${dir}/packets.pcap
 111         (( $(tshark -r ${dir}/packets.pcap \
 112                 -Y 'net_dm.hw_trap_name== blackhole_route' 2> /dev/null \
 113                 | wc -l) == 0))
 114         log_test $? 0 "Capturing inactive hardware drops"
 115
 116         rm -r $dir
 117
 118         cleanup
 119 }
 120
 121 ################################################################################
 122 # usage
 123
 124 usage()
 125 {
 126         cat <<EOF
 127 usage: ${0##*/} OPTS
 128
 129         -t <test>   Test(s) to run (default: all)
 130                     (options: $TESTS)
 131 EOF
 132 }
 133
 134 ################################################################################
 135 # main
 136
 137 while getopts ":t:h" opt; do
 138         case $opt in
 139                 t) TESTS=$OPTARG;;
 140                 h) usage; exit 0;;
 141                 *) usage; exit 1;;
 142         esac
 143 done
 144
 145 if [ "$(id -u)" -ne 0 ];then
 146         echo "SKIP: Need root privileges"
 147         exit $ksft_skip;
 148 fi
 149
 150 if [ ! -x "$(command -v ip)" ]; then
 151         echo "SKIP: Could not run test without ip tool"
 152         exit $ksft_skip
 153 fi
 154
 155 if [ ! -x "$(command -v devlink)" ]; then
 156         echo "SKIP: Could not run test without devlink tool"
 157         exit $ksft_skip
 158 fi
 159
 160 if [ ! -x "$(command -v tshark)" ]; then
 161         echo "SKIP: Could not run test without tshark tool"
 162         exit $ksft_skip
 163 fi
 164
 165 if [ ! -x "$(command -v dwdump)" ]; then
 166         echo "SKIP: Could not run test without dwdump tool"
 167         exit $ksft_skip
 168 fi
 169
 170 if [ ! -x "$(command -v udevadm)" ]; then
 171         echo "SKIP: Could not run test without udevadm tool"
 172         exit $ksft_skip
 173 fi
 174
 175 if [ ! -x "$(command -v timeout)" ]; then
 176         echo "SKIP: Could not run test without timeout tool"
 177         exit $ksft_skip
 178 fi
 179
 180 if [ ! -x "$(command -v mausezahn)" ]; then
 181         echo "SKIP: Could not run test without mausezahn tool"
 182         exit $ksft_skip
 183 fi
 184
 185 tshark -G fields 2> /dev/null | grep -q net_dm
 186 if [ $? -ne 0 ]; then
 187         echo "SKIP: tshark too old, missing net_dm dissector"
 188         exit $ksft_skip
 189 fi
 190
 191 # create netns first so we can get the namespace name
 192 setup_ns NS1
 193 cleanup &> /dev/null
 194 trap cleanup EXIT
 195
 196 IP="ip -netns ${NS1}"
 197 TC="tc -netns ${NS1}"
 198 DEVLINK="devlink -N ${NS1}"
 199 NS_EXEC="ip netns exec ${NS1}"
 200
 201 for t in $TESTS
 202 do
 203         case $t in
 204         sw_drops|sw)                    sw_drops_test;;
 205         hw_drops|hw)                    hw_drops_test;;
 206
 207         help) echo "Test names: $TESTS"; exit 0;;
 208         esac
 209 done
 210
 211 if [ "$TESTS" != "none" ]; then
 212         printf "\nTests passed: %3d\n" ${nsuccess}
 213         printf "Tests failed: %3d\n"   ${nfail}
 214 fi
 215
 216 exit $ret