1#!/bin/bash 2# SPDX-License-Identifier: GPL-2.0 3# 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# h1 8# / 9# h0 - r1 - h2 10# \ 11# h3 12# 13# routing in h0 to hN is done with nexthop objects. 14 15PAUSE_ON_FAIL=no 16VERBOSE=0 17 18which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping) 19 20################################################################################ 21# helpers 22 23log_test() 24{ 25 local rc=$1 26 local expected=$2 27 local msg="$3" 28 29 if [ ${rc} -eq ${expected} ]; then 30 printf "TEST: %-60s [ OK ]\n" "${msg}" 31 nsuccess=$((nsuccess+1)) 32 else 33 ret=1 34 nfail=$((nfail+1)) 35 printf "TEST: %-60s [FAIL]\n" "${msg}" 36 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then 37 echo 38 echo "hit enter to continue, 'q' to quit" 39 read a 40 [ "$a" = "q" ] && exit 1 41 fi 42 fi 43 44 [ "$VERBOSE" = "1" ] && echo 45} 46 47run_cmd() 48{ 49 local cmd="$*" 50 local out 51 local rc 52 53 if [ "$VERBOSE" = "1" ]; then 54 echo "COMMAND: $cmd" 55 fi 56 57 out=$(eval $cmd 2>&1) 58 rc=$? 59 if [ "$VERBOSE" = "1" -a -n "$out" ]; then 60 echo "$out" 61 fi 62 63 [ "$VERBOSE" = "1" ] && echo 64 65 return $rc 66} 67 68################################################################################ 69# config 70 71create_ns() 72{ 73 local ns=${1} 74 75 ip netns del ${ns} 2>/dev/null 76 77 ip netns add ${ns} 78 ip -netns ${ns} addr add 127.0.0.1/8 dev lo 79 ip -netns ${ns} link set lo up 80 81 ip netns exec ${ns} sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1 82 case ${ns} in 83 h*) 84 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0 85 ;; 86 r*) 87 ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1 88 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1 89 ;; 90 esac 91} 92 93setup() 94{ 95 local ns 96 local i 97 98 #set -e 99 100 for ns in h0 r1 h1 h2 h3 101 do 102 create_ns ${ns} 103 done 104 105 # 106 # create interconnects 107 # 108 109 for i in 0 1 2 3 110 do 111 ip -netns h${i} li add eth0 type veth peer name r1h${i} 112 ip -netns h${i} li set eth0 up 113 ip -netns h${i} li set r1h${i} netns r1 name eth${i} up 114 115 ip -netns h${i} addr add dev eth0 172.16.10${i}.1/24 116 ip -netns h${i} -6 addr add dev eth0 2001:db8:10${i}::1/64 117 ip -netns r1 addr add dev eth${i} 172.16.10${i}.254/24 118 ip -netns r1 -6 addr add dev eth${i} 2001:db8:10${i}::64/64 119 done 120 121 ip -netns h0 nexthop add id 4 via 172.16.100.254 dev eth0 122 ip -netns h0 nexthop add id 6 via 2001:db8:100::64 dev eth0 123 124 # routing from h0 to h1-h3 and back 125 for i in 1 2 3 126 do 127 ip -netns h0 ro add 172.16.10${i}.0/24 nhid 4 128 ip -netns h${i} ro add 172.16.100.0/24 via 172.16.10${i}.254 129 130 ip -netns h0 -6 ro add 2001:db8:10${i}::/64 nhid 6 131 ip -netns h${i} -6 ro add 2001:db8:100::/64 via 2001:db8:10${i}::64 132 done 133 134 if [ "$VERBOSE" = "1" ]; then 135 echo 136 echo "host 1 config" 137 ip -netns h0 li sh 138 ip -netns h0 ro sh 139 ip -netns h0 -6 ro sh 140 fi 141 142 #set +e 143} 144 145cleanup() 146{ 147 for n in h0 r1 h1 h2 h3 148 do 149 ip netns del ${n} 2>/dev/null 150 done 151} 152 153change_mtu() 154{ 155 local hostid=$1 156 local mtu=$2 157 158 run_cmd ip -netns h${hostid} li set eth0 mtu ${mtu} 159 run_cmd ip -netns r1 li set eth${hostid} mtu ${mtu} 160} 161 162################################################################################ 163# validate exceptions 164 165validate_v4_exception() 166{ 167 local i=$1 168 local mtu=$2 169 local ping_sz=$3 170 local dst="172.16.10${i}.1" 171 local h0=172.16.100.1 172 local r1=172.16.100.254 173 local rc 174 175 if [ ${ping_sz} != "0" ]; then 176 run_cmd ip netns exec h0 ping -s ${ping_sz} -c5 -w5 ${dst} 177 fi 178 179 if [ "$VERBOSE" = "1" ]; then 180 echo "Route get" 181 ip -netns h0 ro get ${dst} 182 echo "Searching for:" 183 echo " cache .* mtu ${mtu}" 184 echo 185 fi 186 187 ip -netns h0 ro get ${dst} | \ 188 grep -q "cache .* mtu ${mtu}" 189 rc=$? 190 191 log_test $rc 0 "IPv4: host 0 to host ${i}, mtu ${mtu}" 192} 193 194validate_v6_exception() 195{ 196 local i=$1 197 local mtu=$2 198 local ping_sz=$3 199 local dst="2001:db8:10${i}::1" 200 local h0=2001:db8:100::1 201 local r1=2001:db8:100::64 202 local rc 203 204 if [ ${ping_sz} != "0" ]; then 205 run_cmd ip netns exec h0 ${ping6} -s ${ping_sz} -c5 -w5 ${dst} 206 fi 207 208 if [ "$VERBOSE" = "1" ]; then 209 echo "Route get" 210 ip -netns h0 -6 ro get ${dst} 211 echo "Searching for:" 212 echo " ${dst}.* via ${r1} dev eth0 src ${h0} .* mtu ${mtu}" 213 echo 214 fi 215 216 ip -netns h0 -6 ro get ${dst} | \ 217 grep -q "${dst}.* via ${r1} dev eth0 src ${h0} .* mtu ${mtu}" 218 rc=$? 219 220 log_test $rc 0 "IPv6: host 0 to host ${i}, mtu ${mtu}" 221} 222 223################################################################################ 224# main 225 226while getopts :pv o 227do 228 case $o in 229 p) PAUSE_ON_FAIL=yes;; 230 v) VERBOSE=1;; 231 esac 232done 233 234cleanup 235setup 236sleep 2 237 238cpus=$(cat /sys/devices/system/cpu/online) 239cpus="$(seq ${cpus/-/ })" 240ret=0 241for i in 1 2 3 242do 243 # generate a cached route per-cpu 244 for c in ${cpus}; do 245 run_cmd taskset -c ${c} ip netns exec h0 ping -c1 -w1 172.16.10${i}.1 246 [ $? -ne 0 ] && printf "\nERROR: ping to h${i} failed\n" && ret=1 247 248 run_cmd taskset -c ${c} ip netns exec h0 ${ping6} -c1 -w1 2001:db8:10${i}::1 249 [ $? -ne 0 ] && printf "\nERROR: ping6 to h${i} failed\n" && ret=1 250 251 [ $ret -ne 0 ] && break 252 done 253 [ $ret -ne 0 ] && break 254done 255 256if [ $ret -eq 0 ]; then 257 # generate different exceptions in h0 for h1, h2 and h3 258 change_mtu 1 1300 259 validate_v4_exception 1 1300 1350 260 validate_v6_exception 1 1300 1350 261 echo 262 263 change_mtu 2 1350 264 validate_v4_exception 2 1350 1400 265 validate_v6_exception 2 1350 1400 266 echo 267 268 change_mtu 3 1400 269 validate_v4_exception 3 1400 1450 270 validate_v6_exception 3 1400 1450 271 echo 272 273 validate_v4_exception 1 1300 0 274 validate_v6_exception 1 1300 0 275 echo 276 277 validate_v4_exception 2 1350 0 278 validate_v6_exception 2 1350 0 279 echo 280 281 validate_v4_exception 3 1400 0 282 validate_v6_exception 3 1400 0 283 284 # targeted deletes to trigger cleanup paths in kernel 285 ip -netns h0 ro del 172.16.102.0/24 nhid 4 286 ip -netns h0 -6 ro del 2001:db8:102::/64 nhid 6 287 288 ip -netns h0 nexthop del id 4 289 ip -netns h0 nexthop del id 6 290fi 291 292cleanup 293