tools/testing/selftests/net/forwarding/gre_inner_v4_multipath.sh

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # Test traffic distribution when there are multiple routes between an IPv4
   5 # GRE tunnel. The tunnel carries IPv4 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 # | 192.0.3.{2-62}/24 |     |
  14 # +-------------------|-----+
  15 #                     |
  16 # +-------------------|------------------------+
  17 # | SW1               |                        |
  18 # |              $ol1 +                        |
  19 # |      192.0.3.1/24                          |
  20 # |                                            |
  21 # |  + g1 (gre)                                |
  22 # |    loc=192.0.2.65                          |
  23 # |    rem=192.0.2.66 --.                      |
  24 # |    tos=inherit      |                      |
  25 # |                     v                      |
  26 # |                     + $ul1                 |
  27 # |                     | 192.0.2.129/28       |
  28 # +---------------------|----------------------+
  29 #                       |
  30 # +---------------------|----------------------+
  31 # | SW2                 |                      |
  32 # |               $ul21 +                      |
  33 # |      192.0.2.130/28                        |
  34 # |                   |                        |
  35 # !   ________________|_____                   |
  36 # |  /                      \                  |
  37 # |  |                      |                  |
  38 # |  + $ul22.111 (vlan)     + $ul22.222 (vlan) |
  39 # |  | 192.0.2.145/28       | 192.0.2.161/28   |
  40 # |  |                      |                  |
  41 # +--|----------------------|------------------+
  42 #    |                      |
  43 # +--|----------------------|------------------+
  44 # |  |                      |                  |
  45 # |  + $ul32.111 (vlan)     + $ul32.222 (vlan) |
  46 # |  | 192.0.2.146/28       | 192.0.2.162/28   |
  47 # |  |                      |                  |
  48 # |  \______________________/                  |
  49 # |                   |                        |
  50 # |                   |                        |
  51 # |               $ul31 +                      |
  52 # |      192.0.2.177/28 |                  SW3 |
  53 # +---------------------|----------------------+
  54 #                       |
  55 # +---------------------|----------------------+
  56 # |                     + $ul4                 |
  57 # |                     ^ 192.0.2.178/28       |
  58 # |                     |                      |
  59 # |  + g2 (gre)         |                      |
  60 # |    loc=192.0.2.66   |                      |
  61 # |    rem=192.0.2.65 --'                      |
  62 # |    tos=inherit                             |
  63 # |                                            |
  64 # |               $ol4 +                       |
  65 # |       192.0.4.1/24 |                   SW4 |
  66 # +--------------------|-----------------------+
  67 #                      |
  68 # +--------------------|---------+
  69 # |                    |         |
  70 # |                $h2 +         |
  71 # |  192.0.4.{2-62}/24        H2 |
  72 # +------------------------------+
  73
  74 ALL_TESTS="
  75         ping_ipv4
  76         multipath_ipv4
  77 "
  78
  79 NUM_NETIFS=10
  80 source lib.sh
  81
  82 h1_create()
  83 {
  84         simple_if_init $h1 192.0.3.2/24
  85         ip route add vrf v$h1 192.0.4.0/24 via 192.0.3.1
  86 }
  87
  88 h1_destroy()
  89 {
  90         ip route del vrf v$h1 192.0.4.0/24 via 192.0.3.1
  91         simple_if_fini $h1 192.0.3.2/24
  92 }
  93
  94 sw1_create()
  95 {
  96         simple_if_init $ol1 192.0.3.1/24
  97         __simple_if_init $ul1 v$ol1 192.0.2.129/28
  98
  99         tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1
 100         __simple_if_init g1 v$ol1 192.0.2.65/32
 101         ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130
 102
 103         ip route add vrf v$ol1 192.0.4.0/24 nexthop dev g1
 104 }
 105
 106 sw1_destroy()
 107 {
 108         ip route del vrf v$ol1 192.0.4.0/24
 109
 110         ip route del vrf v$ol1 192.0.2.66/32
 111         __simple_if_fini g1 192.0.2.65/32
 112         tunnel_destroy g1
 113
 114         __simple_if_fini $ul1 192.0.2.129/28
 115         simple_if_fini $ol1 192.0.3.1/24
 116 }
 117
 118 sw2_create()
 119 {
 120         simple_if_init $ul21 192.0.2.130/28
 121         __simple_if_init $ul22 v$ul21
 122         vlan_create $ul22 111 v$ul21 192.0.2.145/28
 123         vlan_create $ul22 222 v$ul21 192.0.2.161/28
 124
 125         ip route add vrf v$ul21 192.0.2.65/32 via 192.0.2.129
 126         ip route add vrf v$ul21 192.0.2.66/32 \
 127            nexthop via 192.0.2.146 \
 128            nexthop via 192.0.2.162
 129 }
 130
 131 sw2_destroy()
 132 {
 133         ip route del vrf v$ul21 192.0.2.66/32
 134         ip route del vrf v$ul21 192.0.2.65/32
 135
 136         vlan_destroy $ul22 222
 137         vlan_destroy $ul22 111
 138         __simple_if_fini $ul22
 139         simple_if_fini $ul21 192.0.2.130/28
 140 }
 141
 142 sw3_create()
 143 {
 144         simple_if_init $ul31 192.0.2.177/28
 145         __simple_if_init $ul32 v$ul31
 146         vlan_create $ul32 111 v$ul31 192.0.2.146/28
 147         vlan_create $ul32 222 v$ul31 192.0.2.162/28
 148
 149         ip route add vrf v$ul31 192.0.2.66/32 via 192.0.2.178
 150         ip route add vrf v$ul31 192.0.2.65/32 \
 151            nexthop via 192.0.2.145 \
 152            nexthop via 192.0.2.161
 153
 154         tc qdisc add dev $ul32 clsact
 155         tc filter add dev $ul32 ingress pref 111 prot 802.1Q \
 156            flower vlan_id 111 action pass
 157         tc filter add dev $ul32 ingress pref 222 prot 802.1Q \
 158            flower vlan_id 222 action pass
 159 }
 160
 161 sw3_destroy()
 162 {
 163         tc qdisc del dev $ul32 clsact
 164
 165         ip route del vrf v$ul31 192.0.2.65/32
 166         ip route del vrf v$ul31 192.0.2.66/32
 167
 168         vlan_destroy $ul32 222
 169         vlan_destroy $ul32 111
 170         __simple_if_fini $ul32
 171         simple_if_fini $ul31 192.0.2.177/28
 172 }
 173
 174 sw4_create()
 175 {
 176         simple_if_init $ol4 192.0.4.1/24
 177         __simple_if_init $ul4 v$ol4 192.0.2.178/28
 178
 179         tunnel_create g2 gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol4
 180         __simple_if_init g2 v$ol4 192.0.2.66/32
 181         ip route add vrf v$ol4 192.0.2.65/32 via 192.0.2.177
 182
 183         ip route add vrf v$ol4 192.0.3.0/24 nexthop dev g2
 184 }
 185
 186 sw4_destroy()
 187 {
 188         ip route del vrf v$ol4 192.0.3.0/24
 189
 190         ip route del vrf v$ol4 192.0.2.65/32
 191         __simple_if_fini g2 192.0.2.66/32
 192         tunnel_destroy g2
 193
 194         __simple_if_fini $ul4 192.0.2.178/28
 195         simple_if_fini $ol4 192.0.4.1/24
 196 }
 197
 198 h2_create()
 199 {
 200         simple_if_init $h2 192.0.4.2/24
 201         ip route add vrf v$h2 192.0.3.0/24 via 192.0.4.1
 202 }
 203
 204 h2_destroy()
 205 {
 206         ip route del vrf v$h2 192.0.3.0/24 via 192.0.4.1
 207         simple_if_fini $h2 192.0.4.2/24
 208 }
 209
 210 setup_prepare()
 211 {
 212         h1=${NETIFS[p1]}
 213
 214         ol1=${NETIFS[p2]}
 215         ul1=${NETIFS[p3]}
 216
 217         ul21=${NETIFS[p4]}
 218         ul22=${NETIFS[p5]}
 219
 220         ul32=${NETIFS[p6]}
 221         ul31=${NETIFS[p7]}
 222
 223         ul4=${NETIFS[p8]}
 224         ol4=${NETIFS[p9]}
 225
 226         h2=${NETIFS[p10]}
 227
 228         vrf_prepare
 229         h1_create
 230         sw1_create
 231         sw2_create
 232         sw3_create
 233         sw4_create
 234         h2_create
 235
 236         forwarding_enable
 237 }
 238
 239 cleanup()
 240 {
 241         pre_cleanup
 242
 243         forwarding_restore
 244
 245         h2_destroy
 246         sw4_destroy
 247         sw3_destroy
 248         sw2_destroy
 249         sw1_destroy
 250         h1_destroy
 251         vrf_cleanup
 252 }
 253
 254 multipath4_test()
 255 {
 256         local what=$1; shift
 257         local weight1=$1; shift
 258         local weight2=$1; shift
 259
 260         sysctl_set net.ipv4.fib_multipath_hash_policy 2
 261         ip route replace vrf v$ul21 192.0.2.66/32 \
 262            nexthop via 192.0.2.146 weight $weight1 \
 263            nexthop via 192.0.2.162 weight $weight2
 264
 265         local t0_111=$(tc_rule_stats_get $ul32 111 ingress)
 266         local t0_222=$(tc_rule_stats_get $ul32 222 ingress)
 267
 268         ip vrf exec v$h1 \
 269            $MZ $h1 -q -p 64 -A "192.0.3.2-192.0.3.62" -B "192.0.4.2-192.0.4.62" \
 270                -d $MZ_DELAY -c 50 -t udp "sp=1024,dp=1024"
 271         sleep 1
 272
 273         local t1_111=$(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 192.0.2.66/32 \
 281            nexthop via 192.0.2.146 \
 282            nexthop via 192.0.2.162
 283         sysctl_restore net.ipv4.fib_multipath_hash_policy
 284 }
 285
 286 ping_ipv4()
 287 {
 288         ping_test $h1 192.0.4.2
 289 }
 290
 291 multipath_ipv4()
 292 {
 293         log_info "Running IPv4 over GRE over IPv4 multipath tests"
 294         multipath4_test "ECMP" 1 1
 295         multipath4_test "Weighted MP 2:1" 2 1
 296         multipath4_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