tools/testing/selftests/net/test_vxlan_nolocalbypass.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # This test is for checking the [no]localbypass VXLAN device option. The test
   5 # configures two VXLAN devices in the same network namespace and a tc filter on
   6 # the loopback device that drops encapsulated packets. The test sends packets
   7 # from the first VXLAN device and verifies that by default these packets are
   8 # received by the second VXLAN device. The test then enables the nolocalbypass
   9 # option and verifies that packets are no longer received by the second VXLAN
  10 # device.
  11
  12 source lib.sh
  13 ret=0
  14
  15 TESTS="
  16         nolocalbypass
  17 "
  18 VERBOSE=0
  19 PAUSE_ON_FAIL=no
  20 PAUSE=no
  21
  22 ################################################################################
  23 # Utilities
  24
  25 log_test()
  26 {
  27         local rc=$1
  28         local expected=$2
  29         local msg="$3"
  30
  31         if [ ${rc} -eq ${expected} ]; then
  32                 printf "TEST: %-60s  [ OK ]\n" "${msg}"
  33                 nsuccess=$((nsuccess+1))
  34         else
  35                 ret=1
  36                 nfail=$((nfail+1))
  37                 printf "TEST: %-60s  [FAIL]\n" "${msg}"
  38                 if [ "$VERBOSE" = "1" ]; then
  39                         echo "    rc=$rc, expected $expected"
  40                 fi
  41
  42                 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
  43                 echo
  44                         echo "hit enter to continue, 'q' to quit"
  45                         read a
  46                         [ "$a" = "q" ] && exit 1
  47                 fi
  48         fi
  49
  50         if [ "${PAUSE}" = "yes" ]; then
  51                 echo
  52                 echo "hit enter to continue, 'q' to quit"
  53                 read a
  54                 [ "$a" = "q" ] && exit 1
  55         fi
  56
  57         [ "$VERBOSE" = "1" ] && echo
  58 }
  59
  60 run_cmd()
  61 {
  62         local cmd="$1"
  63         local out
  64         local stderr="2>/dev/null"
  65
  66         if [ "$VERBOSE" = "1" ]; then
  67                 printf "COMMAND: $cmd\n"
  68                 stderr=
  69         fi
  70
  71         out=$(eval $cmd $stderr)
  72         rc=$?
  73         if [ "$VERBOSE" = "1" -a -n "$out" ]; then
  74                 echo "    $out"
  75         fi
  76
  77         return $rc
  78 }
  79
  80 tc_check_packets()
  81 {
  82         local ns=$1; shift
  83         local id=$1; shift
  84         local handle=$1; shift
  85         local count=$1; shift
  86         local pkts
  87
  88         sleep 0.1
  89         pkts=$(tc -n $ns -j -s filter show $id \
  90                 | jq ".[] | select(.options.handle == $handle) | \
  91                 .options.actions[0].stats.packets")
  92         [[ $pkts == $count ]]
  93 }
  94
  95 ################################################################################
  96 # Setup
  97
  98 setup()
  99 {
 100         setup_ns ns1
 101
 102         ip -n $ns1 address add 192.0.2.1/32 dev lo
 103         ip -n $ns1 address add 198.51.100.1/32 dev lo
 104
 105         ip -n $ns1 link add name vx0 up type vxlan id 100 local 198.51.100.1 \
 106                 dstport 4789 nolearning
 107         ip -n $ns1 link add name vx1 up type vxlan id 100 dstport 4790
 108 }
 109
 110 cleanup()
 111 {
 112         cleanup_ns $ns1
 113 }
 114
 115 ################################################################################
 116 # Tests
 117
 118 nolocalbypass()
 119 {
 120         local smac=00:01:02:03:04:05
 121         local dmac=00:0a:0b:0c:0d:0e
 122
 123         run_cmd "bridge -n $ns1 fdb add $dmac dev vx0 self static dst 192.0.2.1 port 4790"
 124
 125         run_cmd "tc -n $ns1 qdisc add dev vx1 clsact"
 126         run_cmd "tc -n $ns1 filter add dev vx1 ingress pref 1 handle 101 proto all flower src_mac $smac dst_mac $dmac action pass"
 127
 128         run_cmd "tc -n $ns1 qdisc add dev lo clsact"
 129         run_cmd "tc -n $ns1 filter add dev lo ingress pref 1 handle 101 proto ip flower ip_proto udp dst_port 4790 action drop"
 130
 131         run_cmd "ip -n $ns1 -d -j link show dev vx0 | jq -e '.[][\"linkinfo\"][\"info_data\"][\"localbypass\"] == true'"
 132         log_test $? 0 "localbypass enabled"
 133
 134         run_cmd "ip netns exec $ns1 mausezahn vx0 -a $smac -b $dmac -c 1 -p 100 -q"
 135
 136         tc_check_packets "$ns1" "dev vx1 ingress" 101 1
 137         log_test $? 0 "Packet received by local VXLAN device - localbypass"
 138
 139         run_cmd "ip -n $ns1 link set dev vx0 type vxlan nolocalbypass"
 140
 141         run_cmd "ip -n $ns1 -d -j link show dev vx0 | jq -e '.[][\"linkinfo\"][\"info_data\"][\"localbypass\"] == false'"
 142         log_test $? 0 "localbypass disabled"
 143
 144         run_cmd "ip netns exec $ns1 mausezahn vx0 -a $smac -b $dmac -c 1 -p 100 -q"
 145
 146         tc_check_packets "$ns1" "dev vx1 ingress" 101 1
 147         log_test $? 0 "Packet not received by local VXLAN device - nolocalbypass"
 148
 149         run_cmd "ip -n $ns1 link set dev vx0 type vxlan localbypass"
 150
 151         run_cmd "ip -n $ns1 -d -j link show dev vx0 | jq -e '.[][\"linkinfo\"][\"info_data\"][\"localbypass\"] == true'"
 152         log_test $? 0 "localbypass enabled"
 153
 154         run_cmd "ip netns exec $ns1 mausezahn vx0 -a $smac -b $dmac -c 1 -p 100 -q"
 155
 156         tc_check_packets "$ns1" "dev vx1 ingress" 101 2
 157         log_test $? 0 "Packet received by local VXLAN device - localbypass"
 158 }
 159
 160 ################################################################################
 161 # Usage
 162
 163 usage()
 164 {
 165         cat <<EOF
 166 usage: ${0##*/} OPTS
 167
 168         -t <test>   Test(s) to run (default: all)
 169                     (options: $TESTS)
 170         -p          Pause on fail
 171         -P          Pause after each test before cleanup
 172         -v          Verbose mode (show commands and output)
 173 EOF
 174 }
 175
 176 ################################################################################
 177 # Main
 178
 179 trap cleanup EXIT
 180
 181 while getopts ":t:pPvh" opt; do
 182         case $opt in
 183                 t) TESTS=$OPTARG ;;
 184                 p) PAUSE_ON_FAIL=yes;;
 185                 P) PAUSE=yes;;
 186                 v) VERBOSE=$(($VERBOSE + 1));;
 187                 h) usage; exit 0;;
 188                 *) usage; exit 1;;
 189         esac
 190 done
 191
 192 # Make sure we don't pause twice.
 193 [ "${PAUSE}" = "yes" ] && PAUSE_ON_FAIL=no
 194
 195 if [ "$(id -u)" -ne 0 ];then
 196         echo "SKIP: Need root privileges"
 197         exit $ksft_skip;
 198 fi
 199
 200 if [ ! -x "$(command -v ip)" ]; then
 201         echo "SKIP: Could not run test without ip tool"
 202         exit $ksft_skip
 203 fi
 204
 205 if [ ! -x "$(command -v bridge)" ]; then
 206         echo "SKIP: Could not run test without bridge tool"
 207         exit $ksft_skip
 208 fi
 209
 210 if [ ! -x "$(command -v mausezahn)" ]; then
 211         echo "SKIP: Could not run test without mausezahn tool"
 212         exit $ksft_skip
 213 fi
 214
 215 if [ ! -x "$(command -v jq)" ]; then
 216         echo "SKIP: Could not run test without jq tool"
 217         exit $ksft_skip
 218 fi
 219
 220 ip link help vxlan 2>&1 | grep -q "localbypass"
 221 if [ $? -ne 0 ]; then
 222         echo "SKIP: iproute2 ip too old, missing VXLAN nolocalbypass support"
 223         exit $ksft_skip
 224 fi
 225
 226 cleanup
 227
 228 for t in $TESTS
 229 do
 230         setup; $t; cleanup;
 231 done
 232
 233 if [ "$TESTS" != "none" ]; then
 234         printf "\nTests passed: %3d\n" ${nsuccess}
 235         printf "Tests failed: %3d\n"   ${nfail}
 236 fi
 237
 238 exit $ret