xref: /linux/tools/testing/selftests/net/forwarding/gre_multipath_nh_res.sh (revision 79790b6818e96c58fe2bffee1b418c16e64e7b80) 
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
62ALL_TESTS="
63	ping_ipv4
64	ping_ipv6
65	multipath_ipv4
66	multipath_ipv6
67"
68
69NUM_NETIFS=6
70source lib.sh
71
72h1_create()
73{
74	simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
75	ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
76	ip route add vrf v$h1 2001:db8:2::/64 via 2001:db8:1::2
77}
78
79h1_destroy()
80{
81	ip route del vrf v$h1 2001:db8:2::/64 via 2001:db8:1::2
82	ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
83	simple_if_fini $h1 192.0.2.1/28
84}
85
86sw1_create()
87{
88	simple_if_init $ol1 192.0.2.2/28 2001:db8:1::2/64
89	__simple_if_init $ul1 v$ol1
90	vlan_create $ul1 111 v$ol1 192.0.2.129/28
91	vlan_create $ul1 222 v$ol1 192.0.2.145/28
92
93	tunnel_create g1a gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1
94	__simple_if_init g1a v$ol1 192.0.2.65/32
95	ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130
96
97	tunnel_create g1b gre 192.0.2.81 192.0.2.82 tos inherit dev v$ol1
98	__simple_if_init g1b v$ol1 192.0.2.81/32
99	ip route add vrf v$ol1 192.0.2.82/32 via 192.0.2.146
100
101	ip -6 nexthop add id 101 dev g1a
102	ip -6 nexthop add id 102 dev g1b
103	ip nexthop add id 103 group 101/102 type resilient buckets 512 \
104		idle_timer 0
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
110sw1_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
133sw2_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 type resilient buckets 512 \
151		idle_timer 0
152
153	ip route add vrf v$ol2 192.0.2.0/28 nhid 203
154	ip route add vrf v$ol2 2001:db8:1::/64 nhid 203
155
156	tc qdisc add dev $ul2 clsact
157	tc filter add dev $ul2 ingress pref 111 prot 802.1Q \
158	   flower vlan_id 111 action pass
159	tc filter add dev $ul2 ingress pref 222 prot 802.1Q \
160	   flower vlan_id 222 action pass
161}
162
163sw2_destroy()
164{
165	tc qdisc del dev $ul2 clsact
166
167	ip route del vrf v$ol2 2001:db8:1::/64
168	ip route del vrf v$ol2 192.0.2.0/28
169
170	ip nexthop del id 203
171	ip -6 nexthop del id 202
172	ip -6 nexthop del id 201
173
174	ip route del vrf v$ol2 192.0.2.81/32 via 192.0.2.145
175	__simple_if_fini g2b 192.0.2.82/32
176	tunnel_destroy g2b
177
178	ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
179	__simple_if_fini g2a 192.0.2.66/32
180	tunnel_destroy g2a
181
182	vlan_destroy $ul2 222
183	vlan_destroy $ul2 111
184	__simple_if_fini $ul2
185	simple_if_fini $ol2 192.0.2.17/28 2001:db8:2::1/64
186}
187
188h2_create()
189{
190	simple_if_init $h2 192.0.2.18/28 2001:db8:2::2/64
191	ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
192	ip route add vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
193}
194
195h2_destroy()
196{
197	ip route del vrf v$h2 2001:db8:1::/64 via 2001:db8:2::1
198	ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
199	simple_if_fini $h2 192.0.2.18/28 2001:db8:2::2/64
200}
201
202setup_prepare()
203{
204	h1=${NETIFS[p1]}
205	ol1=${NETIFS[p2]}
206
207	ul1=${NETIFS[p3]}
208	ul2=${NETIFS[p4]}
209
210	ol2=${NETIFS[p5]}
211	h2=${NETIFS[p6]}
212
213	vrf_prepare
214	h1_create
215	sw1_create
216	sw2_create
217	h2_create
218
219	forwarding_enable
220}
221
222cleanup()
223{
224	pre_cleanup
225
226	forwarding_restore
227
228	h2_destroy
229	sw2_destroy
230	sw1_destroy
231	h1_destroy
232	vrf_cleanup
233}
234
235multipath4_test()
236{
237	local what=$1; shift
238	local weight1=$1; shift
239	local weight2=$1; shift
240
241	sysctl_set net.ipv4.fib_multipath_hash_policy 1
242	ip nexthop replace id 103 group 101,$weight1/102,$weight2 \
243		type resilient
244
245	local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
246	local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
247
248	ip vrf exec v$h1 \
249	   $MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \
250	       -d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
251
252	local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
253	local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
254
255	local d111=$((t1_111 - t0_111))
256	local d222=$((t1_222 - t0_222))
257	multipath_eval "$what" $weight1 $weight2 $d111 $d222
258
259	ip nexthop replace id 103 group 101/102 type resilient
260	sysctl_restore net.ipv4.fib_multipath_hash_policy
261}
262
263multipath6_test()
264{
265	local what=$1; shift
266	local weight1=$1; shift
267	local weight2=$1; shift
268
269	sysctl_set net.ipv6.fib_multipath_hash_policy 1
270	ip nexthop replace id 103 group 101,$weight1/102,$weight2 \
271		type resilient
272
273	local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
274	local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
275
276	ip vrf exec v$h1 \
277		$MZ $h1 -6 -q -p 64 -A 2001:db8:1::1 -B 2001:db8:2::2 \
278		-d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
279
280	local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
281	local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
282
283	local d111=$((t1_111 - t0_111))
284	local d222=$((t1_222 - t0_222))
285	multipath_eval "$what" $weight1 $weight2 $d111 $d222
286
287	ip nexthop replace id 103 group 101/102 type resilient
288	sysctl_restore net.ipv6.fib_multipath_hash_policy
289}
290
291ping_ipv4()
292{
293	ping_test $h1 192.0.2.18
294}
295
296ping_ipv6()
297{
298	ping6_test $h1 2001:db8:2::2
299}
300
301multipath_ipv4()
302{
303	log_info "Running IPv4 multipath tests"
304	multipath4_test "ECMP" 1 1
305	multipath4_test "Weighted MP 2:1" 2 1
306	multipath4_test "Weighted MP 11:45" 11 45
307}
308
309multipath_ipv6()
310{
311	log_info "Running IPv6 multipath tests"
312	multipath6_test "ECMP" 1 1
313	multipath6_test "Weighted MP 2:1" 2 1
314	multipath6_test "Weighted MP 11:45" 11 45
315}
316
317trap cleanup EXIT
318
319setup_prepare
320setup_wait
321tests_run
322
323exit $EXIT_STATUS
324