tools/testing/selftests/net/forwarding/gre_multipath_nh.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
 104
 105         ip route add vrf v$ol1 192.0.2.16/28 nhid 103
 106         ip route add vrf v$ol1 2001:db8:2::/64 nhid 103
 107 }
 108
 109 sw1_destroy()
 110 {
 111         ip route del vrf v$ol1 2001:db8:2::/64
 112         ip route del vrf v$ol1 192.0.2.16/28
 113
 114         ip nexthop del id 103
 115         ip -6 nexthop del id 102
 116         ip -6 nexthop del id 101
 117
 118         ip route del vrf v$ol1 192.0.2.82/32 via 192.0.2.146
 119         __simple_if_fini g1b 192.0.2.81/32
 120         tunnel_destroy g1b
 121
 122         ip route del vrf v$ol1 192.0.2.66/32 via 192.0.2.130
 123         __simple_if_fini g1a 192.0.2.65/32
 124         tunnel_destroy g1a
 125
 126         vlan_destroy $ul1 222
 127         vlan_destroy $ul1 111
 128         __simple_if_fini $ul1
 129         simple_if_fini $ol1 192.0.2.2/28 2001:db8:1::2/64
 130 }
 131
 132 sw2_create()
 133 {
 134         simple_if_init $ol2 192.0.2.17/28 2001:db8:2::1/64
 135         __simple_if_init $ul2 v$ol2
 136         vlan_create $ul2 111 v$ol2 192.0.2.130/28
 137         vlan_create $ul2 222 v$ol2 192.0.2.146/28
 138
 139         tunnel_create g2a gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol2
 140         __simple_if_init g2a v$ol2 192.0.2.66/32
 141         ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129
 142
 143         tunnel_create g2b gre 192.0.2.82 192.0.2.81 tos inherit dev v$ol2
 144         __simple_if_init g2b v$ol2 192.0.2.82/32
 145         ip route add vrf v$ol2 192.0.2.81/32 via 192.0.2.145
 146
 147         ip -6 nexthop add id 201 dev g2a
 148         ip -6 nexthop add id 202 dev g2b
 149         ip nexthop add id 203 group 201/202
 150
 151         ip route add vrf v$ol2 192.0.2.0/28 nhid 203
 152         ip route add vrf v$ol2 2001:db8:1::/64 nhid 203
 153
 154         tc qdisc add dev $ul2 clsact
 155         tc filter add dev $ul2 ingress pref 111 prot 802.1Q \
 156            flower vlan_id 111 action pass
 157         tc filter add dev $ul2 ingress pref 222 prot 802.1Q \
 158            flower vlan_id 222 action pass
 159 }
 160
 161 sw2_destroy()
 162 {
 163         tc qdisc del dev $ul2 clsact
 164
 165         ip route del vrf v$ol2 2001:db8:1::/64
 166         ip route del vrf v$ol2 192.0.2.0/28
 167
 168         ip nexthop del id 203
 169         ip -6 nexthop del id 202
 170         ip -6 nexthop del id 201
 171
 172         ip route del vrf v$ol2 192.0.2.81/32 via 192.0.2.145
 173         __simple_if_fini g2b 192.0.2.82/32
 174         tunnel_destroy g2b
 175
 176         ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
 177         __simple_if_fini g2a 192.0.2.66/32
 178         tunnel_destroy g2a
 179
 180         vlan_destroy $ul2 222
 181         vlan_destroy $ul2 111
 182         __simple_if_fini $ul2
 183         simple_if_fini $ol2 192.0.2.17/28 2001:db8:2::1/64
 184 }
 185
 186 h2_create()
 187 {
 188         simple_if_init $h2 192.0.2.18/28 2001:db8:2::2/64
 189         ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
 190         ip route add vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
 191 }
 192
 193 h2_destroy()
 194 {
 195         ip route del vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
 196         ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
 197         simple_if_fini $h2 192.0.2.18/28 2001:db8:2::2/64
 198 }
 199
 200 setup_prepare()
 201 {
 202         h1=${NETIFS[p1]}
 203         ol1=${NETIFS[p2]}
 204
 205         ul1=${NETIFS[p3]}
 206         ul2=${NETIFS[p4]}
 207
 208         ol2=${NETIFS[p5]}
 209         h2=${NETIFS[p6]}
 210
 211         vrf_prepare
 212         h1_create
 213         sw1_create
 214         sw2_create
 215         h2_create
 216
 217         forwarding_enable
 218 }
 219
 220 cleanup()
 221 {
 222         pre_cleanup
 223
 224         forwarding_restore
 225
 226         h2_destroy
 227         sw2_destroy
 228         sw1_destroy
 229         h1_destroy
 230         vrf_cleanup
 231 }
 232
 233 multipath4_test()
 234 {
 235         local what=$1; shift
 236         local weight1=$1; shift
 237         local weight2=$1; shift
 238
 239         sysctl_set net.ipv4.fib_multipath_hash_policy 1
 240         ip nexthop replace id 103 group 101,$weight1/102,$weight2
 241
 242         local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
 243         local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
 244
 245         ip vrf exec v$h1 \
 246            $MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \
 247                -d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
 248
 249         local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
 250         local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
 251
 252         local d111=$((t1_111 - t0_111))
 253         local d222=$((t1_222 - t0_222))
 254         multipath_eval "$what" $weight1 $weight2 $d111 $d222
 255
 256         ip nexthop replace id 103 group 101/102
 257         sysctl_restore net.ipv4.fib_multipath_hash_policy
 258 }
 259
 260 multipath6_test()
 261 {
 262         local what=$1; shift
 263         local weight1=$1; shift
 264         local weight2=$1; shift
 265
 266         sysctl_set net.ipv6.fib_multipath_hash_policy 1
 267         ip nexthop replace id 103 group 101,$weight1/102,$weight2
 268
 269         local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
 270         local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
 271
 272         ip vrf exec v$h1 \
 273                 $MZ $h1 -6 -q -p 64 -A 2001:db8:1::1 -B 2001:db8:2::2 \
 274                 -d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
 275
 276         local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
 277         local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
 278
 279         local d111=$((t1_111 - t0_111))
 280         local d222=$((t1_222 - t0_222))
 281         multipath_eval "$what" $weight1 $weight2 $d111 $d222
 282
 283         ip nexthop replace id 103 group 101/102
 284         sysctl_restore net.ipv6.fib_multipath_hash_policy
 285 }
 286
 287 ping_ipv4()
 288 {
 289         ping_test $h1 192.0.2.18
 290 }
 291
 292 ping_ipv6()
 293 {
 294         ping6_test $h1 2001:db8:2::2
 295 }
 296
 297 multipath_ipv4()
 298 {
 299         log_info "Running IPv4 multipath tests"
 300         multipath4_test "ECMP" 1 1
 301         multipath4_test "Weighted MP 2:1" 2 1
 302         multipath4_test "Weighted MP 11:45" 11 45
 303 }
 304
 305 multipath_ipv6()
 306 {
 307         log_info "Running IPv6 multipath tests"
 308         multipath6_test "ECMP" 1 1
 309         multipath6_test "Weighted MP 2:1" 2 1
 310         multipath6_test "Weighted MP 11:45" 11 45
 311 }
 312
 313 trap cleanup EXIT
 314
 315 setup_prepare
 316 setup_wait
 317 tests_run
 318
 319 exit $EXIT_STATUS