tools/testing/selftests/net/fib_nexthop_multiprefix.sh

   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
  15 source lib.sh
  16 PAUSE_ON_FAIL=no
  17 VERBOSE=0
  18
  19 which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping)
  20
  21 ################################################################################
  22 # helpers
  23
  24 log_test()
  25 {
  26         local rc=$1
  27         local expected=$2
  28         local msg="$3"
  29
  30         if [ ${rc} -eq ${expected} ]; then
  31                 printf "TEST: %-60s  [ OK ]\n" "${msg}"
  32                 nsuccess=$((nsuccess+1))
  33         else
  34                 ret=1
  35                 nfail=$((nfail+1))
  36                 printf "TEST: %-60s  [FAIL]\n" "${msg}"
  37                 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
  38                         echo
  39                         echo "hit enter to continue, 'q' to quit"
  40                         read a
  41                         [ "$a" = "q" ] && exit 1
  42                 fi
  43         fi
  44
  45         [ "$VERBOSE" = "1" ] && echo
  46 }
  47
  48 run_cmd()
  49 {
  50         local cmd="$*"
  51         local out
  52         local rc
  53
  54         if [ "$VERBOSE" = "1" ]; then
  55                 echo "COMMAND: $cmd"
  56         fi
  57
  58         out=$(eval $cmd 2>&1)
  59         rc=$?
  60         if [ "$VERBOSE" = "1" -a -n "$out" ]; then
  61                 echo "$out"
  62         fi
  63
  64         [ "$VERBOSE" = "1" ] && echo
  65
  66         return $rc
  67 }
  68
  69 ################################################################################
  70 # config
  71
  72 create_ns()
  73 {
  74         local ns=${1}
  75
  76         ip netns exec ${ns} sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1
  77         case ${ns} in
  78         h*)
  79                 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0
  80                 ;;
  81         r*)
  82                 ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1
  83                 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1
  84                 ;;
  85         esac
  86 }
  87
  88 setup()
  89 {
  90         local ns
  91         local i
  92
  93         #set -e
  94
  95         setup_ns h0 r1 h1 h2 h3
  96         h[0]=$h0
  97         h[1]=$h1
  98         h[2]=$h2
  99         h[3]=$h3
 100         r[1]=$r1
 101         for ns in ${h[0]} ${r[1]} ${h[1]} ${h[2]} ${h[3]}
 102         do
 103                 create_ns ${ns}
 104         done
 105
 106         #
 107         # create interconnects
 108         #
 109
 110         for i in 0 1 2 3
 111         do
 112                 ip -netns ${h[$i]} li add eth0 type veth peer name r1h${i}
 113                 ip -netns ${h[$i]} li set eth0 up
 114                 ip -netns ${h[$i]} li set r1h${i} netns ${r[1]} name eth${i} up
 115
 116                 ip -netns ${h[$i]}    addr add dev eth0 172.16.10${i}.1/24
 117                 ip -netns ${h[$i]} -6 addr add dev eth0 2001:db8:10${i}::1/64
 118                 ip -netns ${r[1]}    addr add dev eth${i} 172.16.10${i}.254/24
 119                 ip -netns ${r[1]} -6 addr add dev eth${i} 2001:db8:10${i}::64/64
 120         done
 121
 122         ip -netns ${h[0]} nexthop add id 4 via 172.16.100.254 dev eth0
 123         ip -netns ${h[0]} nexthop add id 6 via 2001:db8:100::64 dev eth0
 124
 125         # routing from ${h[0]} to h1-h3 and back
 126         for i in 1 2 3
 127         do
 128                 ip -netns ${h[0]}    ro add 172.16.10${i}.0/24 nhid 4
 129                 ip -netns ${h[$i]} ro add 172.16.100.0/24 via 172.16.10${i}.254
 130
 131                 ip -netns ${h[0]}    -6 ro add 2001:db8:10${i}::/64 nhid 6
 132                 ip -netns ${h[$i]} -6 ro add 2001:db8:100::/64 via 2001:db8:10${i}::64
 133         done
 134
 135         if [ "$VERBOSE" = "1" ]; then
 136                 echo
 137                 echo "host 1 config"
 138                 ip -netns ${h[0]} li sh
 139                 ip -netns ${h[0]} ro sh
 140                 ip -netns ${h[0]} -6 ro sh
 141         fi
 142
 143         #set +e
 144 }
 145
 146 cleanup()
 147 {
 148         cleanup_all_ns
 149 }
 150
 151 change_mtu()
 152 {
 153         local hostid=$1
 154         local mtu=$2
 155
 156         run_cmd ip -netns h${hostid} li set eth0 mtu ${mtu}
 157         run_cmd ip -netns ${r1} li set eth${hostid} mtu ${mtu}
 158 }
 159
 160 ################################################################################
 161 # validate exceptions
 162
 163 validate_v4_exception()
 164 {
 165         local i=$1
 166         local mtu=$2
 167         local ping_sz=$3
 168         local dst="172.16.10${i}.1"
 169         local h0_ip=172.16.100.1
 170         local r1_ip=172.16.100.254
 171         local rc
 172
 173         if [ ${ping_sz} != "0" ]; then
 174                 run_cmd ip netns exec ${h0} ping -s ${ping_sz} -c5 -w5 ${dst}
 175         fi
 176
 177         if [ "$VERBOSE" = "1" ]; then
 178                 echo "Route get"
 179                 ip -netns ${h0} ro get ${dst}
 180                 echo "Searching for:"
 181                 echo "    cache .* mtu ${mtu}"
 182                 echo
 183         fi
 184
 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
 192 validate_v6_exception()
 193 {
 194         local i=$1
 195         local mtu=$2
 196         local ping_sz=$3
 197         local dst="2001:db8:10${i}::1"
 198         local h0_ip=2001:db8:100::1
 199         local r1_ip=2001:db8:100::64
 200         local rc
 201
 202         if [ ${ping_sz} != "0" ]; then
 203                 run_cmd ip netns exec ${h0} ${ping6} -s ${ping_sz} -c5 -w5 ${dst}
 204         fi
 205
 206         if [ "$VERBOSE" = "1" ]; then
 207                 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                 echo
 212         fi
 213
 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 # main
 223
 224 while getopts :pv o
 225 do
 226         case $o in
 227                 p) PAUSE_ON_FAIL=yes;;
 228                 v) VERBOSE=1;;
 229         esac
 230 done
 231
 232 cleanup
 233 setup
 234 sleep 2
 235
 236 cpus=$(cat  /sys/devices/system/cpu/online)
 237 cpus="$(seq ${cpus/-/ })"
 238 ret=0
 239 for i in 1 2 3
 240 do
 241         # generate a cached route per-cpu
 242         for c in ${cpus}; do
 243                 run_cmd taskset -c ${c} ip netns exec ${h0} ping -c1 -w1 172.16.10${i}.1
 244                 [ $? -ne 0 ] && printf "\nERROR: ping to ${h[$i]} failed\n" && ret=1
 245
 246                 run_cmd taskset -c ${c} ip netns exec ${h0} ${ping6} -c1 -w1 2001:db8:10${i}::1
 247                 [ $? -ne 0 ] && printf "\nERROR: ping6 to ${h[$i]} failed\n" && ret=1
 248
 249                 [ $ret -ne 0 ] && break
 250         done
 251         [ $ret -ne 0 ] && break
 252 done
 253
 254 if [ $ret -eq 0 ]; then
 255         # generate different exceptions in h0 for h1, h2 and h3
 256         change_mtu 1 1300
 257         validate_v4_exception 1 1300 1350
 258         validate_v6_exception 1 1300 1350
 259         echo
 260
 261         change_mtu 2 1350
 262         validate_v4_exception 2 1350 1400
 263         validate_v6_exception 2 1350 1400
 264         echo
 265
 266         change_mtu 3 1400
 267         validate_v4_exception 3 1400 1450
 268         validate_v6_exception 3 1400 1450
 269         echo
 270
 271         validate_v4_exception 1 1300 0
 272         validate_v6_exception 1 1300 0
 273         echo
 274
 275         validate_v4_exception 2 1350 0
 276         validate_v6_exception 2 1350 0
 277         echo
 278
 279         validate_v4_exception 3 1400 0
 280         validate_v6_exception 3 1400 0
 281
 282         # targeted deletes to trigger cleanup paths in kernel
 283         ip -netns ${h0} ro del 172.16.102.0/24 nhid 4
 284         ip -netns ${h0} -6 ro del 2001:db8:102::/64 nhid 6
 285
 286         ip -netns ${h0} nexthop del id 4
 287         ip -netns ${h0} nexthop del id 6
 288 fi
 289
 290 cleanup