tools/testing/selftests/net/forwarding/gre_multipath.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 # +-------------------|-----+
  12 #                     |
  13 # +-------------------|------------------------+
  14 # | SW1               |                        |
  15 # |              $ol1 +                        |
  16 # |      192.0.2.2/28                          |
  17 # |                                            |
  18 # |  + g1a (gre)          + g1b (gre)          |
  19 # |    loc=192.0.2.65       loc=192.0.2.81     |
  20 # |    rem=192.0.2.66 --.   rem=192.0.2.82 --. |
  21 # |    tos=inherit      |   tos=inherit      | |
  22 # |  .------------------'                    | |
  23 # |  |                    .------------------' |
  24 # |  v                    v                    |
  25 # |  + $ul1.111 (vlan)    + $ul1.222 (vlan)    |
  26 # |  | 192.0.2.129/28     | 192.0.2.145/28     |
  27 # |   \                  /                     |
  28 # |    \________________/                      |
  29 # |            |                               |
  30 # |            + $ul1                          |
  31 # +------------|-------------------------------+
  32 #              |
  33 # +------------|-------------------------------+
  34 # | SW2        + $ul2                          |
  35 # |     _______|________                       |
  36 # |    /                \                      |
  37 # |   /                  \                     |
  38 # |  + $ul2.111 (vlan)    + $ul2.222 (vlan)    |
  39 # |  ^ 192.0.2.130/28     ^ 192.0.2.146/28     |
  40 # |  |                    |                    |
  41 # |  |                    '------------------. |
  42 # |  '------------------.                    | |
  43 # |  + g2a (gre)        | + g2b (gre)        | |
  44 # |    loc=192.0.2.66   |   loc=192.0.2.82   | |
  45 # |    rem=192.0.2.65 --'   rem=192.0.2.81 --' |
  46 # |    tos=inherit          tos=inherit        |
  47 # |                                            |
  48 # |              $ol2 +                        |
  49 # |     192.0.2.17/28 |                        |
  50 # +-------------------|------------------------+
  51 #                     |
  52 # +-------------------|-----+
  53 # | H2                |     |
  54 # |               $h2 +     |
  55 # |     192.0.2.18/28       |
  56 # +-------------------------+
  57
  58 ALL_TESTS="
  59         ping_ipv4
  60         multipath_ipv4
  61 "
  62
  63 NUM_NETIFS=6
  64 source lib.sh
  65
  66 h1_create()
  67 {
  68         simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
  69         ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
  70 }
  71
  72 h1_destroy()
  73 {
  74         ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
  75         simple_if_fini $h1 192.0.2.1/28
  76 }
  77
  78 sw1_create()
  79 {
  80         simple_if_init $ol1 192.0.2.2/28
  81         __simple_if_init $ul1 v$ol1
  82         vlan_create $ul1 111 v$ol1 192.0.2.129/28
  83         vlan_create $ul1 222 v$ol1 192.0.2.145/28
  84
  85         tunnel_create g1a gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1
  86         __simple_if_init g1a v$ol1 192.0.2.65/32
  87         ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130
  88
  89         tunnel_create g1b gre 192.0.2.81 192.0.2.82 tos inherit dev v$ol1
  90         __simple_if_init g1b v$ol1 192.0.2.81/32
  91         ip route add vrf v$ol1 192.0.2.82/32 via 192.0.2.146
  92
  93         ip route add vrf v$ol1 192.0.2.16/28 \
  94            nexthop dev g1a \
  95            nexthop dev g1b
  96 }
  97
  98 sw1_destroy()
  99 {
 100         ip route del vrf v$ol1 192.0.2.16/28
 101
 102         ip route del vrf v$ol1 192.0.2.82/32 via 192.0.2.146
 103         __simple_if_fini g1b 192.0.2.81/32
 104         tunnel_destroy g1b
 105
 106         ip route del vrf v$ol1 192.0.2.66/32 via 192.0.2.130
 107         __simple_if_fini g1a 192.0.2.65/32
 108         tunnel_destroy g1a
 109
 110         vlan_destroy $ul1 222
 111         vlan_destroy $ul1 111
 112         __simple_if_fini $ul1
 113         simple_if_fini $ol1 192.0.2.2/28
 114 }
 115
 116 sw2_create()
 117 {
 118         simple_if_init $ol2 192.0.2.17/28
 119         __simple_if_init $ul2 v$ol2
 120         vlan_create $ul2 111 v$ol2 192.0.2.130/28
 121         vlan_create $ul2 222 v$ol2 192.0.2.146/28
 122
 123         tunnel_create g2a gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol2
 124         __simple_if_init g2a v$ol2 192.0.2.66/32
 125         ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129
 126
 127         tunnel_create g2b gre 192.0.2.82 192.0.2.81 tos inherit dev v$ol2
 128         __simple_if_init g2b v$ol2 192.0.2.82/32
 129         ip route add vrf v$ol2 192.0.2.81/32 via 192.0.2.145
 130
 131         ip route add vrf v$ol2 192.0.2.0/28 \
 132            nexthop dev g2a \
 133            nexthop dev g2b
 134
 135         tc qdisc add dev $ul2 clsact
 136         tc filter add dev $ul2 ingress pref 111 prot 802.1Q \
 137            flower vlan_id 111 action pass
 138         tc filter add dev $ul2 ingress pref 222 prot 802.1Q \
 139            flower vlan_id 222 action pass
 140 }
 141
 142 sw2_destroy()
 143 {
 144         tc qdisc del dev $ul2 clsact
 145
 146         ip route del vrf v$ol2 192.0.2.0/28
 147
 148         ip route del vrf v$ol2 192.0.2.81/32 via 192.0.2.145
 149         __simple_if_fini g2b 192.0.2.82/32
 150         tunnel_destroy g2b
 151
 152         ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
 153         __simple_if_fini g2a 192.0.2.66/32
 154         tunnel_destroy g2a
 155
 156         vlan_destroy $ul2 222
 157         vlan_destroy $ul2 111
 158         __simple_if_fini $ul2
 159         simple_if_fini $ol2 192.0.2.17/28
 160 }
 161
 162 h2_create()
 163 {
 164         simple_if_init $h2 192.0.2.18/28
 165         ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
 166 }
 167
 168 h2_destroy()
 169 {
 170         ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
 171         simple_if_fini $h2 192.0.2.18/28
 172 }
 173
 174 setup_prepare()
 175 {
 176         h1=${NETIFS[p1]}
 177         ol1=${NETIFS[p2]}
 178
 179         ul1=${NETIFS[p3]}
 180         ul2=${NETIFS[p4]}
 181
 182         ol2=${NETIFS[p5]}
 183         h2=${NETIFS[p6]}
 184
 185         vrf_prepare
 186         h1_create
 187         sw1_create
 188         sw2_create
 189         h2_create
 190
 191         forwarding_enable
 192 }
 193
 194 cleanup()
 195 {
 196         pre_cleanup
 197
 198         forwarding_restore
 199
 200         h2_destroy
 201         sw2_destroy
 202         sw1_destroy
 203         h1_destroy
 204         vrf_cleanup
 205 }
 206
 207 multipath4_test()
 208 {
 209         local what=$1; shift
 210         local weight1=$1; shift
 211         local weight2=$1; shift
 212
 213         sysctl_set net.ipv4.fib_multipath_hash_policy 1
 214         ip route replace vrf v$ol1 192.0.2.16/28 \
 215            nexthop dev g1a weight $weight1 \
 216            nexthop dev g1b weight $weight2
 217
 218         local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
 219         local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
 220
 221         ip vrf exec v$h1 \
 222            $MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \
 223                -d 1msec -t udp "sp=1024,dp=0-32768"
 224
 225         local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
 226         local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
 227
 228         local d111=$((t1_111 - t0_111))
 229         local d222=$((t1_222 - t0_222))
 230         multipath_eval "$what" $weight1 $weight2 $d111 $d222
 231
 232         ip route replace vrf v$ol1 192.0.2.16/28 \
 233            nexthop dev g1a \
 234            nexthop dev g1b
 235         sysctl_restore net.ipv4.fib_multipath_hash_policy
 236 }
 237
 238 ping_ipv4()
 239 {
 240         ping_test $h1 192.0.2.18
 241 }
 242
 243 multipath_ipv4()
 244 {
 245         log_info "Running IPv4 multipath tests"
 246         multipath4_test "ECMP" 1 1
 247         multipath4_test "Weighted MP 2:1" 2 1
 248         multipath4_test "Weighted MP 11:45" 11 45
 249 }
 250
 251 trap cleanup EXIT
 252
 253 setup_prepare
 254 setup_wait
 255 tests_run
 256
 257 exit $EXIT_STATUS