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 # +---------------------------+ 144 145 h1_create() 146 { 147 simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64 148 ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2 149 } 150 151 h1_destroy() 152 { 153 ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2 154 simple_if_fini $h1 192.0.2.1/28 155 } 156 157 h2_create() 158 { 159 simple_if_init $h2 192.0.2.18/28 160 ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17 161 } 162 163 h2_destroy() 164 { 165 ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17 166 simple_if_fini $h2 192.0.2.18/28 167 } 168 169 sw1_flat_create() 170 { 171 local type=$1; shift 172 local ol1=$1; shift 173 local ul1=$1; shift 174 175 ip link set dev $ol1 up 176 __addr_add_del $ol1 add "192.0.2.2/28" 177 178 ip link set dev $ul1 up 179 vlan_create $ul1 111 "" 192.0.2.129/28 180 181 tunnel_create g1a $type 192.0.2.65 192.0.2.66 tos inherit "$@" 182 ip link set dev g1a up 183 __addr_add_del g1a add "192.0.2.65/32" 184 185 ip route add 192.0.2.66/32 via 192.0.2.130 186 187 ip route add 192.0.2.16/28 nexthop dev g1a 188 } 189 190 sw1_flat_destroy() 191 { 192 local ol1=$1; shift 193 local ul1=$1; shift 194 195 ip route del 192.0.2.16/28 196 197 ip route del 192.0.2.66/32 via 192.0.2.130 198 __simple_if_fini g1a 192.0.2.65/32 199 tunnel_destroy g1a 200 201 vlan_destroy $ul1 111 202 __simple_if_fini $ul1 203 __simple_if_fini $ol1 192.0.2.2/28 204 } 205 206 sw2_flat_create() 207 { 208 local type=$1; shift 209 local ol2=$1; shift 210 local ul2=$1; shift 211 212 simple_if_init $ol2 192.0.2.17/28 213 __simple_if_init $ul2 v$ol2 214 vlan_create $ul2 111 v$ol2 192.0.2.130/28 215 216 tunnel_create g2a $type 192.0.2.66 192.0.2.65 tos inherit dev v$ol2 \ 217 "$@" 218 __simple_if_init g2a v$ol2 192.0.2.66/32 219 220 ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129 221 ip route add vrf v$ol2 192.0.2.0/28 nexthop dev g2a 222 } 223 224 sw2_flat_destroy() 225 { 226 local ol2=$1; shift 227 local ul2=$1; shift 228 229 ip route del vrf v$ol2 192.0.2.0/28 230 231 ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129 232 __simple_if_fini g2a 192.0.2.66/32 233 tunnel_destroy g2a 234 235 vlan_destroy $ul2 111 236 __simple_if_fini $ul2 237 simple_if_fini $ol2 192.0.2.17/28 238 } 239 240 sw1_hierarchical_create() 241 { 242 local type=$1; shift 243 local ol1=$1; shift 244 local ul1=$1; shift 245 246 simple_if_init $ol1 192.0.2.2/28 247 simple_if_init $ul1 248 ip link add name dummy1 type dummy 249 __simple_if_init dummy1 v$ul1 192.0.2.65/32 250 251 vlan_create $ul1 111 v$ul1 192.0.2.129/28 252 tunnel_create g1a $type 192.0.2.65 192.0.2.66 tos inherit dev dummy1 \ 253 "$@" 254 ip link set dev g1a master v$ol1 255 256 ip route add vrf v$ul1 192.0.2.66/32 via 192.0.2.130 257 ip route add vrf v$ol1 192.0.2.16/28 nexthop dev g1a 258 } 259 260 sw1_hierarchical_destroy() 261 { 262 local ol1=$1; shift 263 local ul1=$1; shift 264 265 ip route del vrf v$ol1 192.0.2.16/28 266 ip route del vrf v$ul1 192.0.2.66/32 267 268 tunnel_destroy g1a 269 vlan_destroy $ul1 111 270 271 __simple_if_fini dummy1 192.0.2.65/32 272 ip link del dev dummy1 273 274 simple_if_fini $ul1 275 simple_if_fini $ol1 192.0.2.2/28 276 } 277 278 sw2_hierarchical_create() 279 { 280 local type=$1; shift 281 local ol2=$1; shift 282 local ul2=$1; shift 283 284 simple_if_init $ol2 192.0.2.17/28 285 simple_if_init $ul2 286 287 ip link add name dummy2 type dummy 288 __simple_if_init dummy2 v$ul2 192.0.2.66/32 289 290 vlan_create $ul2 111 v$ul2 192.0.2.130/28 291 tunnel_create g2a $type 192.0.2.66 192.0.2.65 tos inherit dev dummy2 \ 292 "$@" 293 ip link set dev g2a master v$ol2 294 295 ip route add vrf v$ul2 192.0.2.65/32 via 192.0.2.129 296 ip route add vrf v$ol2 192.0.2.0/28 nexthop dev g2a 297 } 298 299 sw2_hierarchical_destroy() 300 { 301 local ol2=$1; shift 302 local ul2=$1; shift 303 304 ip route del vrf v$ol2 192.0.2.0/28 305 ip route del vrf v$ul2 192.0.2.65/32 306 307 tunnel_destroy g2a 308 vlan_destroy $ul2 111 309 310 __simple_if_fini dummy2 192.0.2.66/32 311 ip link del dev dummy2 312 313 simple_if_fini $ul2 314 simple_if_fini $ol2 192.0.2.17/28 315 } 316 317 topo_mtu_change() 318 { 319 local mtu=$1 320 321 ip link set mtu $mtu dev $h1 322 ip link set mtu $mtu dev $ol1 323 ip link set mtu $mtu dev g1a 324 ip link set mtu $mtu dev $ul1 325 ip link set mtu $mtu dev $ul1.111 326 ip link set mtu $mtu dev $h2 327 ip link set mtu $mtu dev $ol2 328 ip link set mtu $mtu dev g2a 329 ip link set mtu $mtu dev $ul2 330 ip link set mtu $mtu dev $ul2.111 331 } 332 333 test_mtu_change() 334 { 335 local encap=$1; shift 336 337 RET=0 338 339 ping_do $h1 192.0.2.18 "-s 1800 -w 3" 340 check_fail $? "ping $encap should not pass with size 1800" 341 342 RET=0 343 344 topo_mtu_change 2000 345 ping_do $h1 192.0.2.18 "-s 1800 -w 3" 346 check_err $? 347 log_test "ping $encap packet size 1800 after MTU change" 348 } 349