tools/testing/selftests/net/forwarding/router_mpath_nh.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 ALL_TESTS="
   5         ping_ipv4
   6         ping_ipv6
   7         multipath_test
   8         ping_ipv4_blackhole
   9         ping_ipv6_blackhole
  10 "
  11 NUM_NETIFS=8
  12 source lib.sh
  13
  14 h1_create()
  15 {
  16         vrf_create "vrf-h1"
  17         ip link set dev $h1 master vrf-h1
  18
  19         ip link set dev vrf-h1 up
  20         ip link set dev $h1 up
  21
  22         ip address add 192.0.2.2/24 dev $h1
  23         ip address add 2001:db8:1::2/64 dev $h1
  24
  25         ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
  26         ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1
  27 }
  28
  29 h1_destroy()
  30 {
  31         ip route del 2001:db8:2::/64 vrf vrf-h1
  32         ip route del 198.51.100.0/24 vrf vrf-h1
  33
  34         ip address del 2001:db8:1::2/64 dev $h1
  35         ip address del 192.0.2.2/24 dev $h1
  36
  37         ip link set dev $h1 down
  38         vrf_destroy "vrf-h1"
  39 }
  40
  41 h2_create()
  42 {
  43         vrf_create "vrf-h2"
  44         ip link set dev $h2 master vrf-h2
  45
  46         ip link set dev vrf-h2 up
  47         ip link set dev $h2 up
  48
  49         ip address add 198.51.100.2/24 dev $h2
  50         ip address add 2001:db8:2::2/64 dev $h2
  51
  52         ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
  53         ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1
  54 }
  55
  56 h2_destroy()
  57 {
  58         ip route del 2001:db8:1::/64 vrf vrf-h2
  59         ip route del 192.0.2.0/24 vrf vrf-h2
  60
  61         ip address del 2001:db8:2::2/64 dev $h2
  62         ip address del 198.51.100.2/24 dev $h2
  63
  64         ip link set dev $h2 down
  65         vrf_destroy "vrf-h2"
  66 }
  67
  68 router1_create()
  69 {
  70         vrf_create "vrf-r1"
  71         ip link set dev $rp11 master vrf-r1
  72         ip link set dev $rp12 master vrf-r1
  73         ip link set dev $rp13 master vrf-r1
  74
  75         ip link set dev vrf-r1 up
  76         ip link set dev $rp11 up
  77         ip link set dev $rp12 up
  78         ip link set dev $rp13 up
  79
  80         ip address add 192.0.2.1/24 dev $rp11
  81         ip address add 2001:db8:1::1/64 dev $rp11
  82
  83         ip address add 169.254.2.12/24 dev $rp12
  84         ip address add fe80:2::12/64 dev $rp12
  85
  86         ip address add 169.254.3.13/24 dev $rp13
  87         ip address add fe80:3::13/64 dev $rp13
  88 }
  89
  90 router1_destroy()
  91 {
  92         ip route del 2001:db8:2::/64 vrf vrf-r1
  93         ip route del 198.51.100.0/24 vrf vrf-r1
  94
  95         ip address del fe80:3::13/64 dev $rp13
  96         ip address del 169.254.3.13/24 dev $rp13
  97
  98         ip address del fe80:2::12/64 dev $rp12
  99         ip address del 169.254.2.12/24 dev $rp12
 100
 101         ip address del 2001:db8:1::1/64 dev $rp11
 102         ip address del 192.0.2.1/24 dev $rp11
 103
 104         ip nexthop del id 103
 105         ip nexthop del id 101
 106         ip nexthop del id 102
 107         ip nexthop del id 106
 108         ip nexthop del id 104
 109         ip nexthop del id 105
 110
 111         ip link set dev $rp13 down
 112         ip link set dev $rp12 down
 113         ip link set dev $rp11 down
 114
 115         vrf_destroy "vrf-r1"
 116 }
 117
 118 router2_create()
 119 {
 120         vrf_create "vrf-r2"
 121         ip link set dev $rp21 master vrf-r2
 122         ip link set dev $rp22 master vrf-r2
 123         ip link set dev $rp23 master vrf-r2
 124
 125         ip link set dev vrf-r2 up
 126         ip link set dev $rp21 up
 127         ip link set dev $rp22 up
 128         ip link set dev $rp23 up
 129
 130         ip address add 198.51.100.1/24 dev $rp21
 131         ip address add 2001:db8:2::1/64 dev $rp21
 132
 133         ip address add 169.254.2.22/24 dev $rp22
 134         ip address add fe80:2::22/64 dev $rp22
 135
 136         ip address add 169.254.3.23/24 dev $rp23
 137         ip address add fe80:3::23/64 dev $rp23
 138 }
 139
 140 router2_destroy()
 141 {
 142         ip route del 2001:db8:1::/64 vrf vrf-r2
 143         ip route del 192.0.2.0/24 vrf vrf-r2
 144
 145         ip address del fe80:3::23/64 dev $rp23
 146         ip address del 169.254.3.23/24 dev $rp23
 147
 148         ip address del fe80:2::22/64 dev $rp22
 149         ip address del 169.254.2.22/24 dev $rp22
 150
 151         ip address del 2001:db8:2::1/64 dev $rp21
 152         ip address del 198.51.100.1/24 dev $rp21
 153
 154         ip nexthop del id 201
 155         ip nexthop del id 202
 156         ip nexthop del id 204
 157         ip nexthop del id 205
 158
 159         ip link set dev $rp23 down
 160         ip link set dev $rp22 down
 161         ip link set dev $rp21 down
 162
 163         vrf_destroy "vrf-r2"
 164 }
 165
 166 routing_nh_obj()
 167 {
 168         ip nexthop add id 101 via 169.254.2.22 dev $rp12
 169         ip nexthop add id 102 via 169.254.3.23 dev $rp13
 170         ip nexthop add id 103 group 101/102
 171         ip route add 198.51.100.0/24 vrf vrf-r1 nhid 103
 172
 173         ip nexthop add id 104 via fe80:2::22 dev $rp12
 174         ip nexthop add id 105 via fe80:3::23 dev $rp13
 175         ip nexthop add id 106 group 104/105
 176         ip route add 2001:db8:2::/64 vrf vrf-r1 nhid 106
 177
 178         ip nexthop add id 201 via 169.254.2.12 dev $rp22
 179         ip nexthop add id 202 via 169.254.3.13 dev $rp23
 180         ip nexthop add id 203 group 201/202
 181         ip route add 192.0.2.0/24 vrf vrf-r2 nhid 203
 182
 183         ip nexthop add id 204 via fe80:2::12 dev $rp22
 184         ip nexthop add id 205 via fe80:3::13 dev $rp23
 185         ip nexthop add id 206 group 204/205
 186         ip route add 2001:db8:1::/64 vrf vrf-r2 nhid 206
 187 }
 188
 189 multipath4_test()
 190 {
 191         local desc="$1"
 192         local weight_rp12=$2
 193         local weight_rp13=$3
 194         local t0_rp12 t0_rp13 t1_rp12 t1_rp13
 195         local packets_rp12 packets_rp13
 196
 197         # Transmit multiple flows from h1 to h2 and make sure they are
 198         # distributed between both multipath links (rp12 and rp13)
 199         # according to the configured weights.
 200         sysctl_set net.ipv4.fib_multipath_hash_policy 1
 201         ip nexthop replace id 103 group 101,$weight_rp12/102,$weight_rp13
 202
 203         t0_rp12=$(link_stats_tx_packets_get $rp12)
 204         t0_rp13=$(link_stats_tx_packets_get $rp13)
 205
 206         ip vrf exec vrf-h1 $MZ -q -p 64 -A 192.0.2.2 -B 198.51.100.2 \
 207                 -d 1msec -t udp "sp=1024,dp=0-32768"
 208
 209         t1_rp12=$(link_stats_tx_packets_get $rp12)
 210         t1_rp13=$(link_stats_tx_packets_get $rp13)
 211
 212         let "packets_rp12 = $t1_rp12 - $t0_rp12"
 213         let "packets_rp13 = $t1_rp13 - $t0_rp13"
 214         multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
 215
 216         # Restore settings.
 217         ip nexthop replace id 103 group 101/102
 218         sysctl_restore net.ipv4.fib_multipath_hash_policy
 219 }
 220
 221 multipath6_l4_test()
 222 {
 223         local desc="$1"
 224         local weight_rp12=$2
 225         local weight_rp13=$3
 226         local t0_rp12 t0_rp13 t1_rp12 t1_rp13
 227         local packets_rp12 packets_rp13
 228
 229         # Transmit multiple flows from h1 to h2 and make sure they are
 230         # distributed between both multipath links (rp12 and rp13)
 231         # according to the configured weights.
 232         sysctl_set net.ipv6.fib_multipath_hash_policy 1
 233
 234         ip nexthop replace id 106 group 104,$weight_rp12/105,$weight_rp13
 235
 236         t0_rp12=$(link_stats_tx_packets_get $rp12)
 237         t0_rp13=$(link_stats_tx_packets_get $rp13)
 238
 239         $MZ $h1 -6 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:2::2 \
 240                 -d 1msec -t udp "sp=1024,dp=0-32768"
 241
 242         t1_rp12=$(link_stats_tx_packets_get $rp12)
 243         t1_rp13=$(link_stats_tx_packets_get $rp13)
 244
 245         let "packets_rp12 = $t1_rp12 - $t0_rp12"
 246         let "packets_rp13 = $t1_rp13 - $t0_rp13"
 247         multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
 248
 249         ip nexthop replace id 106 group 104/105
 250
 251         sysctl_restore net.ipv6.fib_multipath_hash_policy
 252 }
 253
 254 multipath6_test()
 255 {
 256         local desc="$1"
 257         local weight_rp12=$2
 258         local weight_rp13=$3
 259         local t0_rp12 t0_rp13 t1_rp12 t1_rp13
 260         local packets_rp12 packets_rp13
 261
 262         ip nexthop replace id 106 group 104,$weight_rp12/105,$weight_rp13
 263
 264         t0_rp12=$(link_stats_tx_packets_get $rp12)
 265         t0_rp13=$(link_stats_tx_packets_get $rp13)
 266
 267         # Generate 16384 echo requests, each with a random flow label.
 268         for _ in $(seq 1 16384); do
 269                 ip vrf exec vrf-h1 $PING6 2001:db8:2::2 -F 0 -c 1 -q >/dev/null 2>&1
 270         done
 271
 272         t1_rp12=$(link_stats_tx_packets_get $rp12)
 273         t1_rp13=$(link_stats_tx_packets_get $rp13)
 274
 275         let "packets_rp12 = $t1_rp12 - $t0_rp12"
 276         let "packets_rp13 = $t1_rp13 - $t0_rp13"
 277         multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
 278
 279         ip nexthop replace id 106 group 104/105
 280 }
 281
 282 multipath_test()
 283 {
 284         log_info "Running IPv4 multipath tests"
 285         multipath4_test "ECMP" 1 1
 286         multipath4_test "Weighted MP 2:1" 2 1
 287         multipath4_test "Weighted MP 11:45" 11 45
 288
 289         log_info "Running IPv4 multipath tests with IPv6 link-local nexthops"
 290         ip nexthop replace id 101 via fe80:2::22 dev $rp12
 291         ip nexthop replace id 102 via fe80:3::23 dev $rp13
 292
 293         multipath4_test "ECMP" 1 1
 294         multipath4_test "Weighted MP 2:1" 2 1
 295         multipath4_test "Weighted MP 11:45" 11 45
 296
 297         ip nexthop replace id 102 via 169.254.3.23 dev $rp13
 298         ip nexthop replace id 101 via 169.254.2.22 dev $rp12
 299
 300         log_info "Running IPv6 multipath tests"
 301         multipath6_test "ECMP" 1 1
 302         multipath6_test "Weighted MP 2:1" 2 1
 303         multipath6_test "Weighted MP 11:45" 11 45
 304
 305         log_info "Running IPv6 L4 hash multipath tests"
 306         multipath6_l4_test "ECMP" 1 1
 307         multipath6_l4_test "Weighted MP 2:1" 2 1
 308         multipath6_l4_test "Weighted MP 11:45" 11 45
 309 }
 310
 311 ping_ipv4_blackhole()
 312 {
 313         RET=0
 314
 315         ip nexthop add id 1001 blackhole
 316         ip nexthop add id 1002 group 1001
 317
 318         ip route replace 198.51.100.0/24 vrf vrf-r1 nhid 1001
 319         ping_do $h1 198.51.100.2
 320         check_fail $? "ping did not fail when using a blackhole nexthop"
 321
 322         ip route replace 198.51.100.0/24 vrf vrf-r1 nhid 1002
 323         ping_do $h1 198.51.100.2
 324         check_fail $? "ping did not fail when using a blackhole nexthop group"
 325
 326         ip route replace 198.51.100.0/24 vrf vrf-r1 nhid 103
 327         ping_do $h1 198.51.100.2
 328         check_err $? "ping failed with a valid nexthop"
 329
 330         log_test "IPv4 blackhole ping"
 331
 332         ip nexthop del id 1002
 333         ip nexthop del id 1001
 334 }
 335
 336 ping_ipv6_blackhole()
 337 {
 338         RET=0
 339
 340         ip -6 nexthop add id 1001 blackhole
 341         ip nexthop add id 1002 group 1001
 342
 343         ip route replace 2001:db8:2::/64 vrf vrf-r1 nhid 1001
 344         ping6_do $h1 2001:db8:2::2
 345         check_fail $? "ping did not fail when using a blackhole nexthop"
 346
 347         ip route replace 2001:db8:2::/64 vrf vrf-r1 nhid 1002
 348         ping6_do $h1 2001:db8:2::2
 349         check_fail $? "ping did not fail when using a blackhole nexthop group"
 350
 351         ip route replace 2001:db8:2::/64 vrf vrf-r1 nhid 106
 352         ping6_do $h1 2001:db8:2::2
 353         check_err $? "ping failed with a valid nexthop"
 354
 355         log_test "IPv6 blackhole ping"
 356
 357         ip nexthop del id 1002
 358         ip -6 nexthop del id 1001
 359 }
 360
 361 setup_prepare()
 362 {
 363         h1=${NETIFS[p1]}
 364         rp11=${NETIFS[p2]}
 365
 366         rp12=${NETIFS[p3]}
 367         rp22=${NETIFS[p4]}
 368
 369         rp13=${NETIFS[p5]}
 370         rp23=${NETIFS[p6]}
 371
 372         rp21=${NETIFS[p7]}
 373         h2=${NETIFS[p8]}
 374
 375         vrf_prepare
 376
 377         h1_create
 378         h2_create
 379
 380         router1_create
 381         router2_create
 382
 383         forwarding_enable
 384 }
 385
 386 cleanup()
 387 {
 388         pre_cleanup
 389
 390         forwarding_restore
 391
 392         router2_destroy
 393         router1_destroy
 394
 395         h2_destroy
 396         h1_destroy
 397
 398         vrf_cleanup
 399 }
 400
 401 ping_ipv4()
 402 {
 403         ping_test $h1 198.51.100.2
 404 }
 405
 406 ping_ipv6()
 407 {
 408         ping6_test $h1 2001:db8:2::2
 409 }
 410
 411 ip nexthop ls >/dev/null 2>&1
 412 if [ $? -ne 0 ]; then
 413         echo "Nexthop objects not supported; skipping tests"
 414         exit 0
 415 fi
 416
 417 trap cleanup EXIT
 418
 419 setup_prepare
 420 setup_wait
 421 routing_nh_obj
 422
 423 tests_run
 424
 425 exit $EXIT_STATUS