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

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