tools/testing/selftests/net/forwarding/ip6gre_inner_v6_multipath.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # Test traffic distribution when there are multiple routes between an IPv6
   5 # GRE tunnel. The tunnel carries IPv6 traffic between multiple hosts.
   6 # Multiple routes are in the underlay network. With the default multipath
   7 # policy, SW2 will only look at the outer IP addresses, hence only a single
   8 # route would be used.
   9 #
  10 # +-------------------------+
  11 # | H1                      |
  12 # |               $h1 +     |
  13 # |  2001:db8:1::2/64 |     |
  14 # +-------------------|-----+
  15 #                     |
  16 # +-------------------|-------------------------+
  17 # | SW1               |                         |
  18 # |              $ol1 +                         |
  19 # |  2001:db8:1::1/64                           |
  20 # |                                             |
  21 # |  + g1 (gre)                                 |
  22 # |    loc=2001:db8:40::1                       |
  23 # |    rem=2001:db8:40::2 --.                   |
  24 # |    tos=inherit          |                   |
  25 # |                         v                   |
  26 # |                         + $ul1              |
  27 # |                         | 2001:db8:80::1/64 |
  28 # +-------------------------|-------------------+
  29 #                           |
  30 # +-------------------------|-------------------+
  31 # | SW2                     |                   |
  32 # |                   $ul21 +                   |
  33 # |       2001:db8:80::2/64                     |
  34 # |                   |                         |
  35 # !   ________________|_____                    |
  36 # |  /                      \                   |
  37 # |  |                      |                   |
  38 # |  + $ul22.111 (vlan)     + $ul22.222 (vlan)  |
  39 # |  | 2001:db8:81::1/64    | 2001:db8:82::1/64 |
  40 # |  |                      |                   |
  41 # +--|----------------------|-------------------+
  42 #    |                      |
  43 # +--|----------------------|-------------------+
  44 # |  |                      |                   |
  45 # |  + $ul32.111 (vlan)     + $ul32.222 (vlan)  |
  46 # |  | 2001:db8:81::2/64    | 2001:db8:82::2/64 |
  47 # |  |                      |                   |
  48 # |  \______________________/                   |
  49 # |                   |                         |
  50 # |                   |                         |
  51 # |                   $ul31 +                   |
  52 # |       2001:db8:83::2/64 |               SW3 |
  53 # +-------------------------|-------------------+
  54 #                           |
  55 # +-------------------------|-------------------+
  56 # |                         + $ul4              |
  57 # |                         ^ 2001:db8:83::1/64 |
  58 # |  + g2 (gre)             |                   |
  59 # |    loc=2001:db8:40::2   |                   |
  60 # |    rem=2001:db8:40::1 --'                   |
  61 # |    tos=inherit                              |
  62 # |                                             |
  63 # |               $ol4 +                        |
  64 # |   2001:db8:2::1/64 |                    SW4 |
  65 # +--------------------|------------------------+
  66 #                      |
  67 # +--------------------|---------+
  68 # |                    |         |
  69 # |                $h2 +         |
  70 # |   2001:db8:2::2/64        H2 |
  71 # +------------------------------+
  72
  73 ALL_TESTS="
  74         ping_ipv6
  75         multipath_ipv6
  76 "
  77
  78 NUM_NETIFS=10
  79 source lib.sh
  80
  81 h1_create()
  82 {
  83         simple_if_init $h1 2001:db8:1::2/64
  84         ip -6 route add vrf v$h1 2001:db8:2::/64 via 2001:db8:1::1
  85 }
  86
  87 h1_destroy()
  88 {
  89         ip -6 route del vrf v$h1 2001:db8:2::/64 via 2001:db8:1::1
  90         simple_if_fini $h1 2001:db8:1::2/64
  91 }
  92
  93 sw1_create()
  94 {
  95         simple_if_init $ol1 2001:db8:1::1/64
  96         __simple_if_init $ul1 v$ol1 2001:db8:80::1/64
  97
  98         tunnel_create g1 ip6gre 2001:db8:40::1 2001:db8:40::2 tos inherit dev v$ol1
  99         __simple_if_init g1 v$ol1 2001:db8:40::1/128
 100         ip -6 route add vrf v$ol1 2001:db8:40::2/128 via 2001:db8:80::2
 101
 102         ip -6 route add vrf v$ol1 2001:db8:2::/64 dev g1
 103 }
 104
 105 sw1_destroy()
 106 {
 107         ip -6 route del vrf v$ol1 2001:db8:2::/64
 108
 109         ip -6 route del vrf v$ol1 2001:db8:40::2/128
 110         __simple_if_fini g1 2001:db8:40::1/128
 111         tunnel_destroy g1
 112
 113         __simple_if_fini $ul1 2001:db8:80::1/64
 114         simple_if_fini $ol1 2001:db8:1::1/64
 115 }
 116
 117 sw2_create()
 118 {
 119         simple_if_init $ul21 2001:db8:80::2/64
 120         __simple_if_init $ul22 v$ul21
 121         vlan_create $ul22 111 v$ul21 2001:db8:81::1/64
 122         vlan_create $ul22 222 v$ul21 2001:db8:82::1/64
 123
 124         ip -6 route add vrf v$ul21 2001:db8:40::1/128 via 2001:db8:80::1
 125         ip -6 route add vrf v$ul21 2001:db8:40::2/128 \
 126            nexthop via 2001:db8:81::2 \
 127            nexthop via 2001:db8:82::2
 128 }
 129
 130 sw2_destroy()
 131 {
 132         ip -6 route del vrf v$ul21 2001:db8:40::2/128
 133         ip -6 route del vrf v$ul21 2001:db8:40::1/128
 134
 135         vlan_destroy $ul22 222
 136         vlan_destroy $ul22 111
 137         __simple_if_fini $ul22
 138         simple_if_fini $ul21 2001:db8:80::2/64
 139 }
 140
 141 sw3_create()
 142 {
 143         simple_if_init $ul31 2001:db8:83::2/64
 144         __simple_if_init $ul32 v$ul31
 145         vlan_create $ul32 111 v$ul31 2001:db8:81::2/64
 146         vlan_create $ul32 222 v$ul31 2001:db8:82::2/64
 147
 148         ip -6 route add vrf v$ul31 2001:db8:40::2/128 via 2001:db8:83::1
 149         ip -6 route add vrf v$ul31 2001:db8:40::1/128 \
 150            nexthop via 2001:db8:81::1 \
 151            nexthop via 2001:db8:82::1
 152
 153         tc qdisc add dev $ul32 clsact
 154         tc filter add dev $ul32 ingress pref 111 prot 802.1Q \
 155            flower vlan_id 111 action pass
 156         tc filter add dev $ul32 ingress pref 222 prot 802.1Q \
 157            flower vlan_id 222 action pass
 158 }
 159
 160 sw3_destroy()
 161 {
 162         tc qdisc del dev $ul32 clsact
 163
 164         ip -6 route del vrf v$ul31 2001:db8:40::1/128
 165         ip -6 route del vrf v$ul31 2001:db8:40::2/128
 166
 167         vlan_destroy $ul32 222
 168         vlan_destroy $ul32 111
 169         __simple_if_fini $ul32
 170         simple_if_fini $ul31 2001:Db8:83::2/64
 171 }
 172
 173 sw4_create()
 174 {
 175         simple_if_init $ol4 2001:db8:2::1/64
 176         __simple_if_init $ul4 v$ol4 2001:db8:83::1/64
 177
 178         tunnel_create g2 ip6gre 2001:db8:40::2 2001:db8:40::1 tos inherit dev v$ol4
 179         __simple_if_init g2 v$ol4 2001:db8:40::2/128
 180         ip -6 route add vrf v$ol4 2001:db8:40::1/128 via 2001:db8:83::2
 181
 182         ip -6 route add vrf v$ol4 2001:db8:1::/64 dev g2
 183 }
 184
 185 sw4_destroy()
 186 {
 187         ip -6 route del vrf v$ol4 2001:db8:1::/64
 188
 189         ip -6 route del vrf v$ol4 2001:db8:40::1/128
 190         __simple_if_fini g2 2001:db8:40::2/128
 191         tunnel_destroy g2
 192
 193         __simple_if_fini $ul4 2001:db8:83::1/64
 194         simple_if_fini $ol4 2001:db8:2::1/64
 195 }
 196
 197 h2_create()
 198 {
 199         simple_if_init $h2 2001:db8:2::2/64
 200         ip -6 route add vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
 201 }
 202
 203 h2_destroy()
 204 {
 205         ip -6 route del vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
 206         simple_if_fini $h2 2001:db8:2::2/64
 207 }
 208
 209 setup_prepare()
 210 {
 211         h1=${NETIFS[p1]}
 212
 213         ol1=${NETIFS[p2]}
 214         ul1=${NETIFS[p3]}
 215
 216         ul21=${NETIFS[p4]}
 217         ul22=${NETIFS[p5]}
 218
 219         ul32=${NETIFS[p6]}
 220         ul31=${NETIFS[p7]}
 221
 222         ul4=${NETIFS[p8]}
 223         ol4=${NETIFS[p9]}
 224
 225         h2=${NETIFS[p10]}
 226
 227         vrf_prepare
 228         h1_create
 229         sw1_create
 230         sw2_create
 231         sw3_create
 232         sw4_create
 233         h2_create
 234
 235         forwarding_enable
 236 }
 237
 238 cleanup()
 239 {
 240         pre_cleanup
 241
 242         forwarding_restore
 243
 244         h2_destroy
 245         sw4_destroy
 246         sw3_destroy
 247         sw2_destroy
 248         sw1_destroy
 249         h1_destroy
 250         vrf_cleanup
 251 }
 252
 253 multipath6_test()
 254 {
 255         local what=$1; shift
 256         local weight1=$1; shift
 257         local weight2=$1; shift
 258
 259         sysctl_set net.ipv6.fib_multipath_hash_policy 2
 260         ip route replace vrf v$ul21 2001:db8:40::2/128 \
 261            nexthop via 2001:db8:81::2 weight $weight1 \
 262            nexthop via 2001:db8:82::2 weight $weight2
 263
 264         local t0_111=$(tc_rule_stats_get $ul32 111 ingress)
 265         local t0_222=$(tc_rule_stats_get $ul32 222 ingress)
 266
 267         ip vrf exec v$h1 \
 268            $MZ $h1 -6 -q -p 64 -A "2001:db8:1::2-2001:db8:1::1e" \
 269                -B "2001:db8:2::2-2001:db8:2::1e" \
 270                -d 1msec -c 50 -t udp "sp=1024,dp=1024"
 271         sleep 1
 272
 273         local t1_111=$(tc_rule_stats_get $ul32 111 ingress)
 274         local t1_222=$(tc_rule_stats_get $ul32 222 ingress)
 275
 276         local d111=$((t1_111 - t0_111))
 277         local d222=$((t1_222 - t0_222))
 278         multipath_eval "$what" $weight1 $weight2 $d111 $d222
 279
 280         ip route replace vrf v$ul21 2001:db8:40::2/128 \
 281            nexthop via 2001:db8:81::2 \
 282            nexthop via 2001:db8:82::2
 283         sysctl_restore net.ipv6.fib_multipath_hash_policy
 284 }
 285
 286 ping_ipv6()
 287 {
 288         ping_test $h1 2001:db8:2::2
 289 }
 290
 291 multipath_ipv6()
 292 {
 293         log_info "Running IPv6 over GRE over IPv6 multipath tests"
 294         multipath6_test "ECMP" 1 1
 295         multipath6_test "Weighted MP 2:1" 2 1
 296         multipath6_test "Weighted MP 11:45" 11 45
 297 }
 298
 299 trap cleanup EXIT
 300
 301 setup_prepare
 302 setup_wait
 303 tests_run
 304
 305 exit $EXIT_STATUS