Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
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# +---------------------------+
144source lib.sh
145
146h1_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
152h1_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
158h2_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
164h2_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
170sw1_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
191sw1_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
207sw2_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
225sw2_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
241sw1_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
261sw1_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
279sw2_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
300sw2_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
318topo_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
334test_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}