291 lines · bash
1#!/bin/bash2# SPDX-License-Identifier: GPL-2.03#4# Validate cached routes in fib{6}_nh that is used by multiple prefixes.5# Validate a different # exception is generated in h0 for each remote host.6#7# h18# /9# h0 - r1 - h210# \11# h312#13# routing in h0 to hN is done with nexthop objects.14 15source lib.sh16PAUSE_ON_FAIL=no17VERBOSE=018 19which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping)20 21################################################################################22# helpers23 24log_test()25{26 local rc=$127 local expected=$228 local msg="$3"29 30 if [ ${rc} -eq ${expected} ]; then31 printf "TEST: %-60s [ OK ]\n" "${msg}"32 nsuccess=$((nsuccess+1))33 else34 ret=135 nfail=$((nfail+1))36 printf "TEST: %-60s [FAIL]\n" "${msg}"37 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then38 echo39 echo "hit enter to continue, 'q' to quit"40 read a41 [ "$a" = "q" ] && exit 142 fi43 fi44 45 [ "$VERBOSE" = "1" ] && echo46}47 48run_cmd()49{50 local cmd="$*"51 local out52 local rc53 54 if [ "$VERBOSE" = "1" ]; then55 echo "COMMAND: $cmd"56 fi57 58 out=$(eval $cmd 2>&1)59 rc=$?60 if [ "$VERBOSE" = "1" -a -n "$out" ]; then61 echo "$out"62 fi63 64 [ "$VERBOSE" = "1" ] && echo65 66 return $rc67}68 69################################################################################70# config71 72create_ns()73{74 local ns=${1}75 76 ip netns exec ${ns} sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=177 case ${ns} in78 h*)79 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=080 ;;81 r*)82 ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=183 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=184 ;;85 esac86}87 88setup()89{90 local ns91 local i92 93 #set -e94 95 setup_ns h0 r1 h1 h2 h396 h[0]=$h097 h[1]=$h198 h[2]=$h299 h[3]=$h3100 r[1]=$r1101 for ns in ${h[0]} ${r[1]} ${h[1]} ${h[2]} ${h[3]}102 do103 create_ns ${ns}104 done105 106 #107 # create interconnects108 #109 110 for i in 0 1 2 3111 do112 ip -netns ${h[$i]} li add eth0 type veth peer name r1h${i}113 ip -netns ${h[$i]} li set eth0 up114 ip -netns ${h[$i]} li set r1h${i} netns ${r[1]} name eth${i} up115 116 ip -netns ${h[$i]} addr add dev eth0 172.16.10${i}.1/24117 ip -netns ${h[$i]} -6 addr add dev eth0 2001:db8:10${i}::1/64118 ip -netns ${r[1]} addr add dev eth${i} 172.16.10${i}.254/24119 ip -netns ${r[1]} -6 addr add dev eth${i} 2001:db8:10${i}::64/64120 done121 122 ip -netns ${h[0]} nexthop add id 4 via 172.16.100.254 dev eth0123 ip -netns ${h[0]} nexthop add id 6 via 2001:db8:100::64 dev eth0124 125 # routing from ${h[0]} to h1-h3 and back126 for i in 1 2 3127 do128 ip -netns ${h[0]} ro add 172.16.10${i}.0/24 nhid 4129 ip -netns ${h[$i]} ro add 172.16.100.0/24 via 172.16.10${i}.254130 131 ip -netns ${h[0]} -6 ro add 2001:db8:10${i}::/64 nhid 6132 ip -netns ${h[$i]} -6 ro add 2001:db8:100::/64 via 2001:db8:10${i}::64133 done134 135 if [ "$VERBOSE" = "1" ]; then136 echo137 echo "host 1 config"138 ip -netns ${h[0]} li sh139 ip -netns ${h[0]} ro sh140 ip -netns ${h[0]} -6 ro sh141 fi142 143 #set +e144}145 146cleanup()147{148 cleanup_all_ns149}150 151change_mtu()152{153 local hostid=$1154 local mtu=$2155 156 run_cmd ip -netns h${hostid} li set eth0 mtu ${mtu}157 run_cmd ip -netns ${r1} li set eth${hostid} mtu ${mtu}158}159 160################################################################################161# validate exceptions162 163validate_v4_exception()164{165 local i=$1166 local mtu=$2167 local ping_sz=$3168 local dst="172.16.10${i}.1"169 local h0_ip=172.16.100.1170 local r1_ip=172.16.100.254171 local rc172 173 if [ ${ping_sz} != "0" ]; then174 run_cmd ip netns exec ${h0} ping -s ${ping_sz} -c5 -w5 ${dst}175 fi176 177 if [ "$VERBOSE" = "1" ]; then178 echo "Route get"179 ip -netns ${h0} ro get ${dst}180 echo "Searching for:"181 echo " cache .* mtu ${mtu}"182 echo183 fi184 185 ip -netns ${h0} ro get ${dst} | \186 grep -q "cache .* mtu ${mtu}"187 rc=$?188 189 log_test $rc 0 "IPv4: host 0 to host ${i}, mtu ${mtu}"190}191 192validate_v6_exception()193{194 local i=$1195 local mtu=$2196 local ping_sz=$3197 local dst="2001:db8:10${i}::1"198 local h0_ip=2001:db8:100::1199 local r1_ip=2001:db8:100::64200 local rc201 202 if [ ${ping_sz} != "0" ]; then203 run_cmd ip netns exec ${h0} ${ping6} -s ${ping_sz} -c5 -w5 ${dst}204 fi205 206 if [ "$VERBOSE" = "1" ]; then207 echo "Route get"208 ip -netns ${h0} -6 ro get ${dst}209 echo "Searching for:"210 echo " ${dst}.* via ${r1_ip} dev eth0 src ${h0_ip} .* mtu ${mtu}"211 echo212 fi213 214 ip -netns ${h0} -6 ro get ${dst} | \215 grep -q "${dst}.* via ${r1_ip} dev eth0 src ${h0_ip} .* mtu ${mtu}"216 rc=$?217 218 log_test $rc 0 "IPv6: host 0 to host ${i}, mtu ${mtu}"219}220 221################################################################################222# main223 224while getopts :pv o225do226 case $o in227 p) PAUSE_ON_FAIL=yes;;228 v) VERBOSE=1;;229 esac230done231 232cleanup233setup234sleep 2235 236cpus=$(cat /sys/devices/system/cpu/online)237cpus="$(seq ${cpus/-/ })"238ret=0239for i in 1 2 3240do241 # generate a cached route per-cpu242 for c in ${cpus}; do243 run_cmd taskset -c ${c} ip netns exec ${h0} ping -c1 -w1 172.16.10${i}.1244 [ $? -ne 0 ] && printf "\nERROR: ping to ${h[$i]} failed\n" && ret=1245 246 run_cmd taskset -c ${c} ip netns exec ${h0} ${ping6} -c1 -w1 2001:db8:10${i}::1247 [ $? -ne 0 ] && printf "\nERROR: ping6 to ${h[$i]} failed\n" && ret=1248 249 [ $ret -ne 0 ] && break250 done251 [ $ret -ne 0 ] && break252done253 254if [ $ret -eq 0 ]; then255 # generate different exceptions in h0 for h1, h2 and h3256 change_mtu 1 1300257 validate_v4_exception 1 1300 1350258 validate_v6_exception 1 1300 1350259 echo260 261 change_mtu 2 1350262 validate_v4_exception 2 1350 1400263 validate_v6_exception 2 1350 1400264 echo265 266 change_mtu 3 1400267 validate_v4_exception 3 1400 1450268 validate_v6_exception 3 1400 1450269 echo270 271 validate_v4_exception 1 1300 0272 validate_v6_exception 1 1300 0273 echo274 275 validate_v4_exception 2 1350 0276 validate_v6_exception 2 1350 0277 echo278 279 validate_v4_exception 3 1400 0280 validate_v6_exception 3 1400 0281 282 # targeted deletes to trigger cleanup paths in kernel283 ip -netns ${h0} ro del 172.16.102.0/24 nhid 4284 ip -netns ${h0} -6 ro del 2001:db8:102::/64 nhid 6285 286 ip -netns ${h0} nexthop del id 4287 ip -netns ${h0} nexthop del id 6288fi289 290cleanup291