tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4ALL_TESTS="
5 ping_ipv4
6 ping_ipv6
7 multipath_test
8"
9NUM_NETIFS=8
10source lib.sh
11
12h1_create()
13{
14 vrf_create "vrf-h1"
15 ip link set dev $h1 master vrf-h1
16
17 ip link set dev vrf-h1 up
18 ip link set dev $h1 up
19
20 ip address add 192.0.2.2/24 dev $h1
21 ip address add 2001:db8:1::2/64 dev $h1
22
23 ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
24 ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1
25}
26
27h1_destroy()
28{
29 ip route del 2001:db8:2::/64 vrf vrf-h1
30 ip route del 198.51.100.0/24 vrf vrf-h1
31
32 ip address del 2001:db8:1::2/64 dev $h1
33 ip address del 192.0.2.2/24 dev $h1
34
35 ip link set dev $h1 down
36 vrf_destroy "vrf-h1"
37}
38
39h2_create()
40{
41 vrf_create "vrf-h2"
42 ip link set dev $h2 master vrf-h2
43
44 ip link set dev vrf-h2 up
45 ip link set dev $h2 up
46
47 ip address add 198.51.100.2/24 dev $h2
48 ip address add 2001:db8:2::2/64 dev $h2
49
50 ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
51 ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1
52}
53
54h2_destroy()
55{
56 ip route del 2001:db8:1::/64 vrf vrf-h2
57 ip route del 192.0.2.0/24 vrf vrf-h2
58
59 ip address del 2001:db8:2::2/64 dev $h2
60 ip address del 198.51.100.2/24 dev $h2
61
62 ip link set dev $h2 down
63 vrf_destroy "vrf-h2"
64}
65
66router1_create()
67{
68 vrf_create "vrf-r1"
69 ip link set dev $rp11 master vrf-r1
70 ip link set dev $rp12 master vrf-r1
71 ip link set dev $rp13 master vrf-r1
72
73 ip link set dev vrf-r1 up
74 ip link set dev $rp11 up
75 ip link set dev $rp12 up
76 ip link set dev $rp13 up
77
78 ip address add 192.0.2.1/24 dev $rp11
79 ip address add 2001:db8:1::1/64 dev $rp11
80
81 ip address add 169.254.2.12/24 dev $rp12
82 ip address add fe80:2::12/64 dev $rp12
83
84 ip address add 169.254.3.13/24 dev $rp13
85 ip address add fe80:3::13/64 dev $rp13
86}
87
88router1_destroy()
89{
90 ip route del 2001:db8:2::/64 vrf vrf-r1
91 ip route del 198.51.100.0/24 vrf vrf-r1
92
93 ip address del fe80:3::13/64 dev $rp13
94 ip address del 169.254.3.13/24 dev $rp13
95
96 ip address del fe80:2::12/64 dev $rp12
97 ip address del 169.254.2.12/24 dev $rp12
98
99 ip address del 2001:db8:1::1/64 dev $rp11
100 ip address del 192.0.2.1/24 dev $rp11
101
102 ip nexthop del id 103
103 ip nexthop del id 101
104 ip nexthop del id 102
105 ip nexthop del id 106
106 ip nexthop del id 104
107 ip nexthop del id 105
108
109 ip link set dev $rp13 down
110 ip link set dev $rp12 down
111 ip link set dev $rp11 down
112
113 vrf_destroy "vrf-r1"
114}
115
116router2_create()
117{
118 vrf_create "vrf-r2"
119 ip link set dev $rp21 master vrf-r2
120 ip link set dev $rp22 master vrf-r2
121 ip link set dev $rp23 master vrf-r2
122
123 ip link set dev vrf-r2 up
124 ip link set dev $rp21 up
125 ip link set dev $rp22 up
126 ip link set dev $rp23 up
127
128 ip address add 198.51.100.1/24 dev $rp21
129 ip address add 2001:db8:2::1/64 dev $rp21
130
131 ip address add 169.254.2.22/24 dev $rp22
132 ip address add fe80:2::22/64 dev $rp22
133
134 ip address add 169.254.3.23/24 dev $rp23
135 ip address add fe80:3::23/64 dev $rp23
136}
137
138router2_destroy()
139{
140 ip route del 2001:db8:1::/64 vrf vrf-r2
141 ip route del 192.0.2.0/24 vrf vrf-r2
142
143 ip address del fe80:3::23/64 dev $rp23
144 ip address del 169.254.3.23/24 dev $rp23
145
146 ip address del fe80:2::22/64 dev $rp22
147 ip address del 169.254.2.22/24 dev $rp22
148
149 ip address del 2001:db8:2::1/64 dev $rp21
150 ip address del 198.51.100.1/24 dev $rp21
151
152 ip nexthop del id 201
153 ip nexthop del id 202
154 ip nexthop del id 204
155 ip nexthop del id 205
156
157 ip link set dev $rp23 down
158 ip link set dev $rp22 down
159 ip link set dev $rp21 down
160
161 vrf_destroy "vrf-r2"
162}
163
164routing_nh_obj()
165{
166 ip nexthop add id 101 via 169.254.2.22 dev $rp12
167 ip nexthop add id 102 via 169.254.3.23 dev $rp13
168 ip nexthop add id 103 group 101/102 type resilient buckets 512 \
169 idle_timer 0
170 ip route add 198.51.100.0/24 vrf vrf-r1 nhid 103
171
172 ip nexthop add id 104 via fe80:2::22 dev $rp12
173 ip nexthop add id 105 via fe80:3::23 dev $rp13
174 ip nexthop add id 106 group 104/105 type resilient buckets 512 \
175 idle_timer 0
176 ip route add 2001:db8:2::/64 vrf vrf-r1 nhid 106
177
178 ip nexthop add id 201 via 169.254.2.12 dev $rp22
179 ip nexthop add id 202 via 169.254.3.13 dev $rp23
180 ip nexthop add id 203 group 201/202 type resilient buckets 512 \
181 idle_timer 0
182 ip route add 192.0.2.0/24 vrf vrf-r2 nhid 203
183
184 ip nexthop add id 204 via fe80:2::12 dev $rp22
185 ip nexthop add id 205 via fe80:3::13 dev $rp23
186 ip nexthop add id 206 group 204/205 type resilient buckets 512 \
187 idle_timer 0
188 ip route add 2001:db8:1::/64 vrf vrf-r2 nhid 206
189}
190
191multipath4_test()
192{
193 local desc="$1"
194 local weight_rp12=$2
195 local weight_rp13=$3
196 local t0_rp12 t0_rp13 t1_rp12 t1_rp13
197 local packets_rp12 packets_rp13
198
199 # Transmit multiple flows from h1 to h2 and make sure they are
200 # distributed between both multipath links (rp12 and rp13)
201 # according to the provided weights.
202 sysctl_set net.ipv4.fib_multipath_hash_policy 1
203
204 t0_rp12=$(link_stats_tx_packets_get $rp12)
205 t0_rp13=$(link_stats_tx_packets_get $rp13)
206
207 ip vrf exec vrf-h1 $MZ $h1 -q -p 64 -A 192.0.2.2 -B 198.51.100.2 \
208 -d 1msec -t udp "sp=1024,dp=0-32768"
209
210 t1_rp12=$(link_stats_tx_packets_get $rp12)
211 t1_rp13=$(link_stats_tx_packets_get $rp13)
212
213 let "packets_rp12 = $t1_rp12 - $t0_rp12"
214 let "packets_rp13 = $t1_rp13 - $t0_rp13"
215 multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
216
217 # Restore settings.
218 sysctl_restore net.ipv4.fib_multipath_hash_policy
219}
220
221multipath6_l4_test()
222{
223 local desc="$1"
224 local weight_rp12=$2
225 local weight_rp13=$3
226 local t0_rp12 t0_rp13 t1_rp12 t1_rp13
227 local packets_rp12 packets_rp13
228
229 # Transmit multiple flows from h1 to h2 and make sure they are
230 # distributed between both multipath links (rp12 and rp13)
231 # according to the provided weights.
232 sysctl_set net.ipv6.fib_multipath_hash_policy 1
233
234 t0_rp12=$(link_stats_tx_packets_get $rp12)
235 t0_rp13=$(link_stats_tx_packets_get $rp13)
236
237 $MZ $h1 -6 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:2::2 \
238 -d 1msec -t udp "sp=1024,dp=0-32768"
239
240 t1_rp12=$(link_stats_tx_packets_get $rp12)
241 t1_rp13=$(link_stats_tx_packets_get $rp13)
242
243 let "packets_rp12 = $t1_rp12 - $t0_rp12"
244 let "packets_rp13 = $t1_rp13 - $t0_rp13"
245 multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
246
247 sysctl_restore net.ipv6.fib_multipath_hash_policy
248}
249
250multipath_test()
251{
252 # Without an idle timer, weight replacement should happen immediately.
253 log_info "Running multipath tests without an idle timer"
254 ip nexthop replace id 103 group 101/102 type resilient idle_timer 0
255 ip nexthop replace id 106 group 104/105 type resilient idle_timer 0
256
257 log_info "Running IPv4 multipath tests"
258 ip nexthop replace id 103 group 101,1/102,1 type resilient
259 multipath4_test "ECMP" 1 1
260 ip nexthop replace id 103 group 101,2/102,1 type resilient
261 multipath4_test "Weighted MP 2:1" 2 1
262 ip nexthop replace id 103 group 101,11/102,45 type resilient
263 multipath4_test "Weighted MP 11:45" 11 45
264
265 ip nexthop replace id 103 group 101,1/102,1 type resilient
266
267 log_info "Running IPv6 L4 hash multipath tests"
268 ip nexthop replace id 106 group 104,1/105,1 type resilient
269 multipath6_l4_test "ECMP" 1 1
270 ip nexthop replace id 106 group 104,2/105,1 type resilient
271 multipath6_l4_test "Weighted MP 2:1" 2 1
272 ip nexthop replace id 106 group 104,11/105,45 type resilient
273 multipath6_l4_test "Weighted MP 11:45" 11 45
274
275 ip nexthop replace id 106 group 104,1/105,1 type resilient
276
277 # With an idle timer, weight replacement should not happen, so the
278 # expected ratio should always be the initial one (1:1).
279 log_info "Running multipath tests with an idle timer of 120 seconds"
280 ip nexthop replace id 103 group 101/102 type resilient idle_timer 120
281 ip nexthop replace id 106 group 104/105 type resilient idle_timer 120
282
283 log_info "Running IPv4 multipath tests"
284 ip nexthop replace id 103 group 101,1/102,1 type resilient
285 multipath4_test "ECMP" 1 1
286 ip nexthop replace id 103 group 101,2/102,1 type resilient
287 multipath4_test "Weighted MP 2:1" 1 1
288 ip nexthop replace id 103 group 101,11/102,45 type resilient
289 multipath4_test "Weighted MP 11:45" 1 1
290
291 ip nexthop replace id 103 group 101,1/102,1 type resilient
292
293 log_info "Running IPv6 L4 hash multipath tests"
294 ip nexthop replace id 106 group 104,1/105,1 type resilient
295 multipath6_l4_test "ECMP" 1 1
296 ip nexthop replace id 106 group 104,2/105,1 type resilient
297 multipath6_l4_test "Weighted MP 2:1" 1 1
298 ip nexthop replace id 106 group 104,11/105,45 type resilient
299 multipath6_l4_test "Weighted MP 11:45" 1 1
300
301 ip nexthop replace id 106 group 104,1/105,1 type resilient
302
303 # With a short idle timer and enough idle time, weight replacement
304 # should happen.
305 log_info "Running multipath tests with an idle timer of 5 seconds"
306 ip nexthop replace id 103 group 101/102 type resilient idle_timer 5
307 ip nexthop replace id 106 group 104/105 type resilient idle_timer 5
308
309 log_info "Running IPv4 multipath tests"
310 sleep 10
311 ip nexthop replace id 103 group 101,1/102,1 type resilient
312 multipath4_test "ECMP" 1 1
313 sleep 10
314 ip nexthop replace id 103 group 101,2/102,1 type resilient
315 multipath4_test "Weighted MP 2:1" 2 1
316 sleep 10
317 ip nexthop replace id 103 group 101,11/102,45 type resilient
318 multipath4_test "Weighted MP 11:45" 11 45
319
320 ip nexthop replace id 103 group 101,1/102,1 type resilient
321
322 log_info "Running IPv6 L4 hash multipath tests"
323 sleep 10
324 ip nexthop replace id 106 group 104,1/105,1 type resilient
325 multipath6_l4_test "ECMP" 1 1
326 sleep 10
327 ip nexthop replace id 106 group 104,2/105,1 type resilient
328 multipath6_l4_test "Weighted MP 2:1" 2 1
329 sleep 10
330 ip nexthop replace id 106 group 104,11/105,45 type resilient
331 multipath6_l4_test "Weighted MP 11:45" 11 45
332
333 ip nexthop replace id 106 group 104,1/105,1 type resilient
334}
335
336setup_prepare()
337{
338 h1=${NETIFS[p1]}
339 rp11=${NETIFS[p2]}
340
341 rp12=${NETIFS[p3]}
342 rp22=${NETIFS[p4]}
343
344 rp13=${NETIFS[p5]}
345 rp23=${NETIFS[p6]}
346
347 rp21=${NETIFS[p7]}
348 h2=${NETIFS[p8]}
349
350 vrf_prepare
351
352 h1_create
353 h2_create
354
355 router1_create
356 router2_create
357
358 forwarding_enable
359}
360
361cleanup()
362{
363 pre_cleanup
364
365 forwarding_restore
366
367 router2_destroy
368 router1_destroy
369
370 h2_destroy
371 h1_destroy
372
373 vrf_cleanup
374}
375
376ping_ipv4()
377{
378 ping_test $h1 198.51.100.2
379}
380
381ping_ipv6()
382{
383 ping6_test $h1 2001:db8:2::2
384}
385
386ip nexthop ls >/dev/null 2>&1
387if [ $? -ne 0 ]; then
388 echo "Nexthop objects not supported; skipping tests"
389 exit $ksft_skip
390fi
391
392trap cleanup EXIT
393
394setup_prepare
395setup_wait
396routing_nh_obj
397
398tests_run
399
400exit $EXIT_STATUS