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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
145h1_create()
146{
147 simple_if_init $h1 192.0.2.1/28
148 ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
149}
150
151h1_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
157h2_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
163h2_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
169sw1_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
190sw1_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
206sw2_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
224sw2_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
240sw1_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
260sw1_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
278sw2_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
299sw2_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
317topo_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
333test_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}