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

   1 #!/bin/bash
   2 # SPDX-License-Identifier: GPL-2.0
   3
   4 # Handles creation and destruction of IP-in-IP or GRE tunnels over the given
   5 # topology. Supports both flat and hierarchical models.
   6 #
   7 # Flat Model:
   8 # Overlay and underlay share the same VRF.
   9 # SW1 uses default VRF so tunnel has no bound dev.
  10 # SW2 uses non-default VRF tunnel has a bound dev.
  11 # +-------------------------+
  12 # | H1                      |
  13 # |               $h1 +     |
  14 # |      192.0.2.1/28 |     |
  15 # +-------------------|-----+
  16 #                     |
  17 # +-------------------|-----+
  18 # | SW1               |     |
  19 # |              $ol1 +     |
  20 # |      192.0.2.2/28       |
  21 # |                         |
  22 # |  + g1a (gre)            |
  23 # |    loc=192.0.2.65       |
  24 # |    rem=192.0.2.66 --.   |
  25 # |    tos=inherit      |   |
  26 # |  .------------------'   |
  27 # |  |                      |
  28 # |  v                      |
  29 # |  + $ul1.111 (vlan)      |
  30 # |  | 192.0.2.129/28       |
  31 # |   \                     |
  32 # |    \_______             |
  33 # |            |            |
  34 # |VRF default + $ul1       |
  35 # +------------|------------+
  36 #              |
  37 # +------------|------------+
  38 # | SW2        + $ul2       |
  39 # |     _______|            |
  40 # |    /                    |
  41 # |   /                     |
  42 # |  + $ul2.111 (vlan)      |
  43 # |  ^ 192.0.2.130/28       |
  44 # |  |                      |
  45 # |  |                      |
  46 # |  '------------------.   |
  47 # |  + g2a (gre)        |   |
  48 # |    loc=192.0.2.66   |   |
  49 # |    rem=192.0.2.65 --'   |
  50 # |    tos=inherit          |
  51 # |                         |
  52 # |              $ol2 +     |
  53 # |     192.0.2.17/28 |     |
  54 # | VRF v$ol2         |     |
  55 # +-------------------|-----+
  56 #                     |
  57 # +-------------------|-----+
  58 # | H2                |     |
  59 # |               $h2 +     |
  60 # |     192.0.2.18/28       |
  61 # +-------------------------+
  62 #
  63 # Hierarchical model:
  64 # The tunnel is bound to a device in a different VRF
  65 #
  66 # +---------------------------+
  67 # | H1                        |
  68 # |               $h1 +       |
  69 # |      192.0.2.1/28 |       |
  70 # +-------------------|-------+
  71 #                     |
  72 # +-------------------|-------+
  73 # | SW1               |       |
  74 # | +-----------------|-----+ |
  75 # | |            $ol1 +     | |
  76 # | |     192.0.2.2/28      | |
  77 # | |                       | |
  78 # | |    + g1a (gre)        | |
  79 # | |    rem=192.0.2.66     | |
  80 # | |    tos=inherit        | |
  81 # | |    loc=192.0.2.65     | |
  82 # | |           ^           | |
  83 # | | VRF v$ol1 |           | |
  84 # | +-----------|-----------+ |
  85 # |             |             |
  86 # | +-----------|-----------+ |
  87 # | | VRF v$ul1 |           | |
  88 # | |           |           | |
  89 # | |           |           | |
  90 # | |           v           | |
  91 # | |    dummy1 +           | |
  92 # | |   192.0.2.65          | |
  93 # | |   .-------'           | |
  94 # | |   |                   | |
  95 # | |   v                   | |
  96 # | |   + $ul1.111 (vlan)   | |
  97 # | |   | 192.0.2.129/28    | |
  98 # | |   \                   | |
  99 # | |    \_____             | |
 100 # | |          |            | |
 101 # | |          + $ul1       | |
 102 # | +----------|------------+ |
 103 # +------------|--------------+
 104 #              |
 105 # +------------|--------------+
 106 # | SW2        |              |
 107 # | +----------|------------+ |
 108 # | |          + $ul2       | |
 109 # | |     _____|            | |
 110 # | |    /                  | |
 111 # | |   /                   | |
 112 # | |   | $ul2.111 (vlan)   | |
 113 # | |   + 192.0.2.130/28    | |
 114 # | |   ^                   | |
 115 # | |   |                   | |
 116 # | |   '-------.           | |
 117 # | |    dummy2 +           | |
 118 # | |    192.0.2.66         | |
 119 # | |           ^           | |
 120 # | |           |           | |
 121 # | |           |           | |
 122 # | | VRF v$ul2 |           | |
 123 # | +-----------|-----------+ |
 124 # |             |             |
 125 # | +-----------|-----------+ |
 126 # | | VRF v$ol2 |           | |
 127 # | |           |           | |
 128 # | |           v           | |
 129 # | |  g2a (gre)+           | |
 130 # | |  loc=192.0.2.66       | |
 131 # | |  rem=192.0.2.65       | |
 132 # | |  tos=inherit          | |
 133 # | |                       | |
 134 # | |            $ol2 +     | |
 135 # | |   192.0.2.17/28 |     | |
 136 # | +-----------------|-----+ |
 137 # +-------------------|-------+
 138 #                     |
 139 # +-------------------|-------+
 140 # | H2                |       |
 141 # |               $h2 +       |
 142 # |     192.0.2.18/28         |
 143 # +---------------------------+
 144 source lib.sh
 145
 146 h1_create()
 147 {
 148         simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
 149         ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
 150 }
 151
 152 h1_destroy()
 153 {
 154         ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
 155         simple_if_fini $h1 192.0.2.1/28
 156 }
 157
 158 h2_create()
 159 {
 160         simple_if_init $h2 192.0.2.18/28
 161         ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
 162 }
 163
 164 h2_destroy()
 165 {
 166         ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
 167         simple_if_fini $h2 192.0.2.18/28
 168 }
 169
 170 sw1_flat_create()
 171 {
 172         local type=$1; shift
 173         local ol1=$1; shift
 174         local ul1=$1; shift
 175
 176         ip link set dev $ol1 up
 177         __addr_add_del $ol1 add "192.0.2.2/28"
 178
 179         ip link set dev $ul1 up
 180         vlan_create $ul1 111 "" 192.0.2.129/28
 181
 182         tunnel_create g1a $type 192.0.2.65 192.0.2.66 tos inherit "$@"
 183         ip link set dev g1a up
 184         __addr_add_del g1a add "192.0.2.65/32"
 185
 186         ip route add 192.0.2.66/32 via 192.0.2.130
 187
 188         ip route add 192.0.2.16/28 nexthop dev g1a
 189 }
 190
 191 sw1_flat_destroy()
 192 {
 193         local ol1=$1; shift
 194         local ul1=$1; shift
 195
 196         ip route del 192.0.2.16/28
 197
 198         ip route del 192.0.2.66/32 via 192.0.2.130
 199         __simple_if_fini g1a 192.0.2.65/32
 200         tunnel_destroy g1a
 201
 202         vlan_destroy $ul1 111
 203         __simple_if_fini $ul1
 204         __simple_if_fini $ol1 192.0.2.2/28
 205 }
 206
 207 sw2_flat_create()
 208 {
 209         local type=$1; shift
 210         local ol2=$1; shift
 211         local ul2=$1; shift
 212
 213         simple_if_init $ol2 192.0.2.17/28
 214         __simple_if_init $ul2 v$ol2
 215         vlan_create $ul2 111 v$ol2 192.0.2.130/28
 216
 217         tunnel_create g2a $type 192.0.2.66 192.0.2.65 tos inherit dev v$ol2 \
 218                 "$@"
 219         __simple_if_init g2a v$ol2 192.0.2.66/32
 220
 221         ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129
 222         ip route add vrf v$ol2 192.0.2.0/28 nexthop dev g2a
 223 }
 224
 225 sw2_flat_destroy()
 226 {
 227         local ol2=$1; shift
 228         local ul2=$1; shift
 229
 230         ip route del vrf v$ol2 192.0.2.0/28
 231
 232         ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
 233         __simple_if_fini g2a 192.0.2.66/32
 234         tunnel_destroy g2a
 235
 236         vlan_destroy $ul2 111
 237         __simple_if_fini $ul2
 238         simple_if_fini $ol2 192.0.2.17/28
 239 }
 240
 241 sw1_hierarchical_create()
 242 {
 243         local type=$1; shift
 244         local ol1=$1; shift
 245         local ul1=$1; shift
 246
 247         simple_if_init $ol1 192.0.2.2/28
 248         simple_if_init $ul1
 249         ip link add name dummy1 type dummy
 250         __simple_if_init dummy1 v$ul1 192.0.2.65/32
 251
 252         vlan_create $ul1 111 v$ul1 192.0.2.129/28
 253         tunnel_create g1a $type 192.0.2.65 192.0.2.66 tos inherit dev dummy1 \
 254                 "$@"
 255         ip link set dev g1a master v$ol1
 256
 257         ip route add vrf v$ul1 192.0.2.66/32 via 192.0.2.130
 258         ip route add vrf v$ol1 192.0.2.16/28 nexthop dev g1a
 259 }
 260
 261 sw1_hierarchical_destroy()
 262 {
 263         local ol1=$1; shift
 264         local ul1=$1; shift
 265
 266         ip route del vrf v$ol1 192.0.2.16/28
 267         ip route del vrf v$ul1 192.0.2.66/32
 268
 269         tunnel_destroy g1a
 270         vlan_destroy $ul1 111
 271
 272         __simple_if_fini dummy1 192.0.2.65/32
 273         ip link del dev dummy1
 274
 275         simple_if_fini $ul1
 276         simple_if_fini $ol1 192.0.2.2/28
 277 }
 278
 279 sw2_hierarchical_create()
 280 {
 281         local type=$1; shift
 282         local ol2=$1; shift
 283         local ul2=$1; shift
 284
 285         simple_if_init $ol2 192.0.2.17/28
 286         simple_if_init $ul2
 287
 288         ip link add name dummy2 type dummy
 289         __simple_if_init dummy2 v$ul2 192.0.2.66/32
 290
 291         vlan_create $ul2 111 v$ul2 192.0.2.130/28
 292         tunnel_create g2a $type 192.0.2.66 192.0.2.65 tos inherit dev dummy2 \
 293                 "$@"
 294         ip link set dev g2a master v$ol2
 295
 296         ip route add vrf v$ul2 192.0.2.65/32 via 192.0.2.129
 297         ip route add vrf v$ol2 192.0.2.0/28 nexthop dev g2a
 298 }
 299
 300 sw2_hierarchical_destroy()
 301 {
 302         local ol2=$1; shift
 303         local ul2=$1; shift
 304
 305         ip route del vrf v$ol2 192.0.2.0/28
 306         ip route del vrf v$ul2 192.0.2.65/32
 307
 308         tunnel_destroy g2a
 309         vlan_destroy $ul2 111
 310
 311         __simple_if_fini dummy2 192.0.2.66/32
 312         ip link del dev dummy2
 313
 314         simple_if_fini $ul2
 315         simple_if_fini $ol2 192.0.2.17/28
 316 }
 317
 318 topo_mtu_change()
 319 {
 320         local mtu=$1
 321
 322         ip link set mtu $mtu dev $h1
 323         ip link set mtu $mtu dev $ol1
 324         ip link set mtu $mtu dev g1a
 325         ip link set mtu $mtu dev $ul1
 326         ip link set mtu $mtu dev $ul1.111
 327         ip link set mtu $mtu dev $h2
 328         ip link set mtu $mtu dev $ol2
 329         ip link set mtu $mtu dev g2a
 330         ip link set mtu $mtu dev $ul2
 331         ip link set mtu $mtu dev $ul2.111
 332 }
 333
 334 test_mtu_change()
 335 {
 336         local encap=$1; shift
 337
 338         RET=0
 339
 340         ping_do $h1 192.0.2.18 "-s 1800 -w 3"
 341         check_fail $? "ping $encap should not pass with size 1800"
 342
 343         RET=0
 344
 345         topo_mtu_change 2000
 346         ping_do $h1 192.0.2.18 "-s 1800 -w 3"
 347         check_err $?
 348         log_test "ping $encap packet size 1800 after MTU change"
 349 }