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         multipath_ipv6_l4
  68 "
  69
  70 NUM_NETIFS=6
  71 source lib.sh
  72
  73 h1_create()
  74 {
  75         simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
  76         ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
  77         ip route add vrf v$h1 2001:db8:2::/64 via 2001:db8:1::2
  78 }
  79
  80 h1_destroy()
  81 {
  82         ip route del vrf v$h1 2001:db8:2::/64 via 2001:db8:1::2
  83         ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
  84         simple_if_fini $h1 192.0.2.1/28
  85 }
  86
  87 sw1_create()
  88 {
  89         simple_if_init $ol1 192.0.2.2/28 2001:db8:1::2/64
  90         __simple_if_init $ul1 v$ol1
  91         vlan_create $ul1 111 v$ol1 192.0.2.129/28
  92         vlan_create $ul1 222 v$ol1 192.0.2.145/28
  93
  94         tunnel_create g1a gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1
  95         __simple_if_init g1a v$ol1 192.0.2.65/32
  96         ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130
  97
  98         tunnel_create g1b gre 192.0.2.81 192.0.2.82 tos inherit dev v$ol1
  99         __simple_if_init g1b v$ol1 192.0.2.81/32
 100         ip route add vrf v$ol1 192.0.2.82/32 via 192.0.2.146
 101
 102         ip -6 nexthop add id 101 dev g1a
 103         ip -6 nexthop add id 102 dev g1b
 104         ip nexthop add id 103 group 101/102
 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
 151
 152         ip route add vrf v$ol2 192.0.2.0/28 nhid 203
 153         ip route add vrf v$ol2 2001:db8:1::/64 nhid 203
 154
 155         tc qdisc add dev $ul2 clsact
 156         tc filter add dev $ul2 ingress pref 111 prot 802.1Q \
 157            flower vlan_id 111 action pass
 158         tc filter add dev $ul2 ingress pref 222 prot 802.1Q \
 159            flower vlan_id 222 action pass
 160 }
 161
 162 sw2_destroy()
 163 {
 164         tc qdisc del dev $ul2 clsact
 165
 166         ip route del vrf v$ol2 2001:db8:1::/64
 167         ip route del vrf v$ol2 192.0.2.0/28
 168
 169         ip nexthop del id 203
 170         ip -6 nexthop del id 202
 171         ip -6 nexthop del id 201
 172
 173         ip route del vrf v$ol2 192.0.2.81/32 via 192.0.2.145
 174         __simple_if_fini g2b 192.0.2.82/32
 175         tunnel_destroy g2b
 176
 177         ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
 178         __simple_if_fini g2a 192.0.2.66/32
 179         tunnel_destroy g2a
 180
 181         vlan_destroy $ul2 222
 182         vlan_destroy $ul2 111
 183         __simple_if_fini $ul2
 184         simple_if_fini $ol2 192.0.2.17/28 2001:db8:2::1/64
 185 }
 186
 187 h2_create()
 188 {
 189         simple_if_init $h2 192.0.2.18/28 2001:db8:2::2/64
 190         ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
 191         ip route add vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
 192 }
 193
 194 h2_destroy()
 195 {
 196         ip route del vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
 197         ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
 198         simple_if_fini $h2 192.0.2.18/28 2001:db8:2::2/64
 199 }
 200
 201 setup_prepare()
 202 {
 203         h1=${NETIFS[p1]}
 204         ol1=${NETIFS[p2]}
 205
 206         ul1=${NETIFS[p3]}
 207         ul2=${NETIFS[p4]}
 208
 209         ol2=${NETIFS[p5]}
 210         h2=${NETIFS[p6]}
 211
 212         vrf_prepare
 213         h1_create
 214         sw1_create
 215         sw2_create
 216         h2_create
 217
 218         forwarding_enable
 219 }
 220
 221 cleanup()
 222 {
 223         pre_cleanup
 224
 225         forwarding_restore
 226
 227         h2_destroy
 228         sw2_destroy
 229         sw1_destroy
 230         h1_destroy
 231         vrf_cleanup
 232 }
 233
 234 multipath4_test()
 235 {
 236         local what=$1; shift
 237         local weight1=$1; shift
 238         local weight2=$1; shift
 239
 240         sysctl_set net.ipv4.fib_multipath_hash_policy 1
 241         ip nexthop replace id 103 group 101,$weight1/102,$weight2
 242
 243         local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
 244         local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
 245
 246         ip vrf exec v$h1 \
 247            $MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \
 248                -d 1msec -t udp "sp=1024,dp=0-32768"
 249
 250         local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
 251         local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
 252
 253         local d111=$((t1_111 - t0_111))
 254         local d222=$((t1_222 - t0_222))
 255         multipath_eval "$what" $weight1 $weight2 $d111 $d222
 256
 257         ip nexthop replace id 103 group 101/102
 258         sysctl_restore net.ipv4.fib_multipath_hash_policy
 259 }
 260
 261 multipath6_test()
 262 {
 263         local what=$1; shift
 264         local weight1=$1; shift
 265         local weight2=$1; shift
 266
 267         sysctl_set net.ipv6.fib_multipath_hash_policy 0
 268         ip nexthop replace id 103 group 101,$weight1/102,$weight2
 269
 270         local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
 271         local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
 272
 273         # Generate 16384 echo requests, each with a random flow label.
 274         for ((i=0; i < 16384; ++i)); do
 275                 ip vrf exec v$h1 $PING6 2001:db8:2::2 -F 0 -c 1 -q &> /dev/null
 276         done
 277
 278         local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
 279         local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
 280
 281         local d111=$((t1_111 - t0_111))
 282         local d222=$((t1_222 - t0_222))
 283         multipath_eval "$what" $weight1 $weight2 $d111 $d222
 284
 285         ip nexthop replace id 103 group 101/102
 286         sysctl_restore net.ipv6.fib_multipath_hash_policy
 287 }
 288
 289 multipath6_l4_test()
 290 {
 291         local what=$1; shift
 292         local weight1=$1; shift
 293         local weight2=$1; shift
 294
 295         sysctl_set net.ipv6.fib_multipath_hash_policy 1
 296         ip nexthop replace id 103 group 101,$weight1/102,$weight2
 297
 298         local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
 299         local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
 300
 301         ip vrf exec v$h1 \
 302                 $MZ $h1 -6 -q -p 64 -A 2001:db8:1::1 -B 2001:db8:2::2 \
 303                 -d 1msec -t udp "sp=1024,dp=0-32768"
 304
 305         local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
 306         local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
 307
 308         local d111=$((t1_111 - t0_111))
 309         local d222=$((t1_222 - t0_222))
 310         multipath_eval "$what" $weight1 $weight2 $d111 $d222
 311
 312         ip nexthop replace id 103 group 101/102
 313         sysctl_restore net.ipv6.fib_multipath_hash_policy
 314 }
 315
 316 ping_ipv4()
 317 {
 318         ping_test $h1 192.0.2.18
 319 }
 320
 321 ping_ipv6()
 322 {
 323         ping6_test $h1 2001:db8:2::2
 324 }
 325
 326 multipath_ipv4()
 327 {
 328         log_info "Running IPv4 multipath tests"
 329         multipath4_test "ECMP" 1 1
 330         multipath4_test "Weighted MP 2:1" 2 1
 331         multipath4_test "Weighted MP 11:45" 11 45
 332 }
 333
 334 multipath_ipv6()
 335 {
 336         log_info "Running IPv6 multipath tests"
 337         multipath6_test "ECMP" 1 1
 338         multipath6_test "Weighted MP 2:1" 2 1
 339         multipath6_test "Weighted MP 11:45" 11 45
 340 }
 341
 342 multipath_ipv6_l4()
 343 {
 344         log_info "Running IPv6 L4 hash multipath tests"
 345         multipath6_l4_test "ECMP" 1 1
 346         multipath6_l4_test "Weighted MP 2:1" 2 1
 347         multipath6_l4_test "Weighted MP 11:45" 11 45
 348 }
 349
 350 trap cleanup EXIT
 351
 352 setup_prepare
 353 setup_wait
 354 tests_run
 355
 356 exit $EXIT_STATUS