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

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # Test traffic distribution when a wECMP route forwards traffic to two GRE
   5 # tunnels.
   6 #
   7 # +-------------------------+
   8 # | H1                      |
   9 # |               $h1 +     |
  10 # |      192.0.2.1/28 |     |
  11 # |  2001:db8:1::1/64 |     |
  12 # +-------------------|-----+
  13 #                     |
  14 # +-------------------|------------------------+
  15 # | SW1               |                        |
  16 # |              $ol1 +                        |
  17 # |      192.0.2.2/28                          |
  18 # |  2001:db8:1::2/64                          |
  19 # |                                            |
  20 # |  + g1a (gre)          + g1b (gre)          |
  21 # |    loc=192.0.2.65       loc=192.0.2.81     |
  22 # |    rem=192.0.2.66 --.   rem=192.0.2.82 --. |
  23 # |    tos=inherit      |   tos=inherit      | |
  24 # |  .------------------'                    | |
  25 # |  |                    .------------------' |
  26 # |  v                    v                    |
  27 # |  + $ul1.111 (vlan)    + $ul1.222 (vlan)    |
  28 # |  | 192.0.2.129/28     | 192.0.2.145/28     |
  29 # |   \                  /                     |
  30 # |    \________________/                      |
  31 # |            |                               |
  32 # |            + $ul1                          |
  33 # +------------|-------------------------------+
  34 #              |
  35 # +------------|-------------------------------+
  36 # | SW2        + $ul2                          |
  37 # |     _______|________                       |
  38 # |    /                \                      |
  39 # |   /                  \                     |
  40 # |  + $ul2.111 (vlan)    + $ul2.222 (vlan)    |
  41 # |  ^ 192.0.2.130/28     ^ 192.0.2.146/28     |
  42 # |  |                    |                    |
  43 # |  |                    '------------------. |
  44 # |  '------------------.                    | |
  45 # |  + g2a (gre)        | + g2b (gre)        | |
  46 # |    loc=192.0.2.66   |   loc=192.0.2.82   | |
  47 # |    rem=192.0.2.65 --'   rem=192.0.2.81 --' |
  48 # |    tos=inherit          tos=inherit        |
  49 # |                                            |
  50 # |              $ol2 +                        |
  51 # |     192.0.2.17/28 |                        |
  52 # |  2001:db8:2::1/64 |                        |
  53 # +-------------------|------------------------+
  54 #                     |
  55 # +-------------------|-----+
  56 # | H2                |     |
  57 # |               $h2 +     |
  58 # |     192.0.2.18/28       |
  59 # |  2001:db8:2::2/64       |
  60 # +-------------------------+
  61
  62 ALL_TESTS="
  63         ping_ipv4
  64         ping_ipv6
  65         multipath_ipv4
  66         multipath_ipv6
  67 "
  68
  69 NUM_NETIFS=6
  70 source lib.sh
  71
  72 h1_create()
  73 {
  74         simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
  75         ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
  76         ip route add vrf v$h1 2001:db8:2::/64 via 2001:db8:1::2
  77 }
  78
  79 h1_destroy()
  80 {
  81         ip route del vrf v$h1 2001:db8:2::/64 via 2001:db8:1::2
  82         ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
  83         simple_if_fini $h1 192.0.2.1/28
  84 }
  85
  86 sw1_create()
  87 {
  88         simple_if_init $ol1 192.0.2.2/28 2001:db8:1::2/64
  89         __simple_if_init $ul1 v$ol1
  90         vlan_create $ul1 111 v$ol1 192.0.2.129/28
  91         vlan_create $ul1 222 v$ol1 192.0.2.145/28
  92
  93         tunnel_create g1a gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1
  94         __simple_if_init g1a v$ol1 192.0.2.65/32
  95         ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130
  96
  97         tunnel_create g1b gre 192.0.2.81 192.0.2.82 tos inherit dev v$ol1
  98         __simple_if_init g1b v$ol1 192.0.2.81/32
  99         ip route add vrf v$ol1 192.0.2.82/32 via 192.0.2.146
 100
 101         ip -6 nexthop add id 101 dev g1a
 102         ip -6 nexthop add id 102 dev g1b
 103         ip nexthop add id 103 group 101/102 type resilient buckets 512 \
 104                 idle_timer 0
 105
 106         ip route add vrf v$ol1 192.0.2.16/28 nhid 103
 107         ip route add vrf v$ol1 2001:db8:2::/64 nhid 103
 108 }
 109
 110 sw1_destroy()
 111 {
 112         ip route del vrf v$ol1 2001:db8:2::/64
 113         ip route del vrf v$ol1 192.0.2.16/28
 114
 115         ip nexthop del id 103
 116         ip -6 nexthop del id 102
 117         ip -6 nexthop del id 101
 118
 119         ip route del vrf v$ol1 192.0.2.82/32 via 192.0.2.146
 120         __simple_if_fini g1b 192.0.2.81/32
 121         tunnel_destroy g1b
 122
 123         ip route del vrf v$ol1 192.0.2.66/32 via 192.0.2.130
 124         __simple_if_fini g1a 192.0.2.65/32
 125         tunnel_destroy g1a
 126
 127         vlan_destroy $ul1 222
 128         vlan_destroy $ul1 111
 129         __simple_if_fini $ul1
 130         simple_if_fini $ol1 192.0.2.2/28 2001:db8:1::2/64
 131 }
 132
 133 sw2_create()
 134 {
 135         simple_if_init $ol2 192.0.2.17/28 2001:db8:2::1/64
 136         __simple_if_init $ul2 v$ol2
 137         vlan_create $ul2 111 v$ol2 192.0.2.130/28
 138         vlan_create $ul2 222 v$ol2 192.0.2.146/28
 139
 140         tunnel_create g2a gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol2
 141         __simple_if_init g2a v$ol2 192.0.2.66/32
 142         ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129
 143
 144         tunnel_create g2b gre 192.0.2.82 192.0.2.81 tos inherit dev v$ol2
 145         __simple_if_init g2b v$ol2 192.0.2.82/32
 146         ip route add vrf v$ol2 192.0.2.81/32 via 192.0.2.145
 147
 148         ip -6 nexthop add id 201 dev g2a
 149         ip -6 nexthop add id 202 dev g2b
 150         ip nexthop add id 203 group 201/202 type resilient buckets 512 \
 151                 idle_timer 0
 152
 153         ip route add vrf v$ol2 192.0.2.0/28 nhid 203
 154         ip route add vrf v$ol2 2001:db8:1::/64 nhid 203
 155
 156         tc qdisc add dev $ul2 clsact
 157         tc filter add dev $ul2 ingress pref 111 prot 802.1Q \
 158            flower vlan_id 111 action pass
 159         tc filter add dev $ul2 ingress pref 222 prot 802.1Q \
 160            flower vlan_id 222 action pass
 161 }
 162
 163 sw2_destroy()
 164 {
 165         tc qdisc del dev $ul2 clsact
 166
 167         ip route del vrf v$ol2 2001:db8:1::/64
 168         ip route del vrf v$ol2 192.0.2.0/28
 169
 170         ip nexthop del id 203
 171         ip -6 nexthop del id 202
 172         ip -6 nexthop del id 201
 173
 174         ip route del vrf v$ol2 192.0.2.81/32 via 192.0.2.145
 175         __simple_if_fini g2b 192.0.2.82/32
 176         tunnel_destroy g2b
 177
 178         ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
 179         __simple_if_fini g2a 192.0.2.66/32
 180         tunnel_destroy g2a
 181
 182         vlan_destroy $ul2 222
 183         vlan_destroy $ul2 111
 184         __simple_if_fini $ul2
 185         simple_if_fini $ol2 192.0.2.17/28 2001:db8:2::1/64
 186 }
 187
 188 h2_create()
 189 {
 190         simple_if_init $h2 192.0.2.18/28 2001:db8:2::2/64
 191         ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
 192         ip route add vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
 193 }
 194
 195 h2_destroy()
 196 {
 197         ip route del vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
 198         ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
 199         simple_if_fini $h2 192.0.2.18/28 2001:db8:2::2/64
 200 }
 201
 202 setup_prepare()
 203 {
 204         h1=${NETIFS[p1]}
 205         ol1=${NETIFS[p2]}
 206
 207         ul1=${NETIFS[p3]}
 208         ul2=${NETIFS[p4]}
 209
 210         ol2=${NETIFS[p5]}
 211         h2=${NETIFS[p6]}
 212
 213         vrf_prepare
 214         h1_create
 215         sw1_create
 216         sw2_create
 217         h2_create
 218
 219         forwarding_enable
 220 }
 221
 222 cleanup()
 223 {
 224         pre_cleanup
 225
 226         forwarding_restore
 227
 228         h2_destroy
 229         sw2_destroy
 230         sw1_destroy
 231         h1_destroy
 232         vrf_cleanup
 233 }
 234
 235 multipath4_test()
 236 {
 237         local what=$1; shift
 238         local weight1=$1; shift
 239         local weight2=$1; shift
 240
 241         sysctl_set net.ipv4.fib_multipath_hash_policy 1
 242         ip nexthop replace id 103 group 101,$weight1/102,$weight2 \
 243                 type resilient
 244
 245         local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
 246         local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
 247
 248         ip vrf exec v$h1 \
 249            $MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \
 250                -d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
 251
 252         local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
 253         local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
 254
 255         local d111=$((t1_111 - t0_111))
 256         local d222=$((t1_222 - t0_222))
 257         multipath_eval "$what" $weight1 $weight2 $d111 $d222
 258
 259         ip nexthop replace id 103 group 101/102 type resilient
 260         sysctl_restore net.ipv4.fib_multipath_hash_policy
 261 }
 262
 263 multipath6_test()
 264 {
 265         local what=$1; shift
 266         local weight1=$1; shift
 267         local weight2=$1; shift
 268
 269         sysctl_set net.ipv6.fib_multipath_hash_policy 1
 270         ip nexthop replace id 103 group 101,$weight1/102,$weight2 \
 271                 type resilient
 272
 273         local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
 274         local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
 275
 276         ip vrf exec v$h1 \
 277                 $MZ $h1 -6 -q -p 64 -A 2001:db8:1::1 -B 2001:db8:2::2 \
 278                 -d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
 279
 280         local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
 281         local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
 282
 283         local d111=$((t1_111 - t0_111))
 284         local d222=$((t1_222 - t0_222))
 285         multipath_eval "$what" $weight1 $weight2 $d111 $d222
 286
 287         ip nexthop replace id 103 group 101/102 type resilient
 288         sysctl_restore net.ipv6.fib_multipath_hash_policy
 289 }
 290
 291 ping_ipv4()
 292 {
 293         ping_test $h1 192.0.2.18
 294 }
 295
 296 ping_ipv6()
 297 {
 298         ping6_test $h1 2001:db8:2::2
 299 }
 300
 301 multipath_ipv4()
 302 {
 303         log_info "Running IPv4 multipath tests"
 304         multipath4_test "ECMP" 1 1
 305         multipath4_test "Weighted MP 2:1" 2 1
 306         multipath4_test "Weighted MP 11:45" 11 45
 307 }
 308
 309 multipath_ipv6()
 310 {
 311         log_info "Running IPv6 multipath tests"
 312         multipath6_test "ECMP" 1 1
 313         multipath6_test "Weighted MP 2:1" 2 1
 314         multipath6_test "Weighted MP 11:45" 11 45
 315 }
 316
 317 trap cleanup EXIT
 318
 319 setup_prepare
 320 setup_wait
 321 tests_run
 322
 323 exit $EXIT_STATUS