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
4ALL_TESTS="ping_ipv4 ping_ipv6 multipath_test"
5NUM_NETIFS=8
6source lib.sh
7
8h1_create()
9{
10 vrf_create "vrf-h1"
11 ip link set dev $h1 master vrf-h1
12
13 ip link set dev vrf-h1 up
14 ip link set dev $h1 up
15
16 ip address add 192.0.2.2/24 dev $h1
17 ip address add 2001:db8:1::2/64 dev $h1
18
19 ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
20 ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1
21}
22
23h1_destroy()
24{
25 ip route del 2001:db8:2::/64 vrf vrf-h1
26 ip route del 198.51.100.0/24 vrf vrf-h1
27
28 ip address del 2001:db8:1::2/64 dev $h1
29 ip address del 192.0.2.2/24 dev $h1
30
31 ip link set dev $h1 down
32 vrf_destroy "vrf-h1"
33}
34
35h2_create()
36{
37 vrf_create "vrf-h2"
38 ip link set dev $h2 master vrf-h2
39
40 ip link set dev vrf-h2 up
41 ip link set dev $h2 up
42
43 ip address add 198.51.100.2/24 dev $h2
44 ip address add 2001:db8:2::2/64 dev $h2
45
46 ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
47 ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1
48}
49
50h2_destroy()
51{
52 ip route del 2001:db8:1::/64 vrf vrf-h2
53 ip route del 192.0.2.0/24 vrf vrf-h2
54
55 ip address del 2001:db8:2::2/64 dev $h2
56 ip address del 198.51.100.2/24 dev $h2
57
58 ip link set dev $h2 down
59 vrf_destroy "vrf-h2"
60}
61
62router1_create()
63{
64 vrf_create "vrf-r1"
65 ip link set dev $rp11 master vrf-r1
66 ip link set dev $rp12 master vrf-r1
67 ip link set dev $rp13 master vrf-r1
68
69 ip link set dev vrf-r1 up
70 ip link set dev $rp11 up
71 ip link set dev $rp12 up
72 ip link set dev $rp13 up
73
74 ip address add 192.0.2.1/24 dev $rp11
75 ip address add 2001:db8:1::1/64 dev $rp11
76
77 ip address add 169.254.2.12/24 dev $rp12
78 ip address add fe80:2::12/64 dev $rp12
79
80 ip address add 169.254.3.13/24 dev $rp13
81 ip address add fe80:3::13/64 dev $rp13
82
83 ip route add 198.51.100.0/24 vrf vrf-r1 \
84 nexthop via 169.254.2.22 dev $rp12 \
85 nexthop via 169.254.3.23 dev $rp13
86 ip route add 2001:db8:2::/64 vrf vrf-r1 \
87 nexthop via fe80:2::22 dev $rp12 \
88 nexthop via fe80:3::23 dev $rp13
89}
90
91router1_destroy()
92{
93 ip route del 2001:db8:2::/64 vrf vrf-r1
94 ip route del 198.51.100.0/24 vrf vrf-r1
95
96 ip address del fe80:3::13/64 dev $rp13
97 ip address del 169.254.3.13/24 dev $rp13
98
99 ip address del fe80:2::12/64 dev $rp12
100 ip address del 169.254.2.12/24 dev $rp12
101
102 ip address del 2001:db8:1::1/64 dev $rp11
103 ip address del 192.0.2.1/24 dev $rp11
104
105 ip link set dev $rp13 down
106 ip link set dev $rp12 down
107 ip link set dev $rp11 down
108
109 vrf_destroy "vrf-r1"
110}
111
112router2_create()
113{
114 vrf_create "vrf-r2"
115 ip link set dev $rp21 master vrf-r2
116 ip link set dev $rp22 master vrf-r2
117 ip link set dev $rp23 master vrf-r2
118
119 ip link set dev vrf-r2 up
120 ip link set dev $rp21 up
121 ip link set dev $rp22 up
122 ip link set dev $rp23 up
123
124 ip address add 198.51.100.1/24 dev $rp21
125 ip address add 2001:db8:2::1/64 dev $rp21
126
127 ip address add 169.254.2.22/24 dev $rp22
128 ip address add fe80:2::22/64 dev $rp22
129
130 ip address add 169.254.3.23/24 dev $rp23
131 ip address add fe80:3::23/64 dev $rp23
132
133 ip route add 192.0.2.0/24 vrf vrf-r2 \
134 nexthop via 169.254.2.12 dev $rp22 \
135 nexthop via 169.254.3.13 dev $rp23
136 ip route add 2001:db8:1::/64 vrf vrf-r2 \
137 nexthop via fe80:2::12 dev $rp22 \
138 nexthop via fe80:3::13 dev $rp23
139}
140
141router2_destroy()
142{
143 ip route del 2001:db8:1::/64 vrf vrf-r2
144 ip route del 192.0.2.0/24 vrf vrf-r2
145
146 ip address del fe80:3::23/64 dev $rp23
147 ip address del 169.254.3.23/24 dev $rp23
148
149 ip address del fe80:2::22/64 dev $rp22
150 ip address del 169.254.2.22/24 dev $rp22
151
152 ip address del 2001:db8:2::1/64 dev $rp21
153 ip address del 198.51.100.1/24 dev $rp21
154
155 ip link set dev $rp23 down
156 ip link set dev $rp22 down
157 ip link set dev $rp21 down
158
159 vrf_destroy "vrf-r2"
160}
161
162multipath_eval()
163{
164 local desc="$1"
165 local weight_rp12=$2
166 local weight_rp13=$3
167 local packets_rp12=$4
168 local packets_rp13=$5
169 local weights_ratio packets_ratio diff
170
171 RET=0
172
173 if [[ "$packets_rp12" -eq "0" || "$packets_rp13" -eq "0" ]]; then
174 check_err 1 "Packet difference is 0"
175 log_test "Multipath"
176 log_info "Expected ratio $weights_ratio"
177 return
178 fi
179
180 if [[ "$weight_rp12" -gt "$weight_rp13" ]]; then
181 weights_ratio=$(echo "scale=2; $weight_rp12 / $weight_rp13" \
182 | bc -l)
183 packets_ratio=$(echo "scale=2; $packets_rp12 / $packets_rp13" \
184 | bc -l)
185 else
186 weights_ratio=$(echo "scale=2; $weight_rp13 / $weight_rp12" | \
187 bc -l)
188 packets_ratio=$(echo "scale=2; $packets_rp13 / $packets_rp12" | \
189 bc -l)
190 fi
191
192 diff=$(echo $weights_ratio - $packets_ratio | bc -l)
193 diff=${diff#-}
194
195 test "$(echo "$diff / $weights_ratio > 0.15" | bc -l)" -eq 0
196 check_err $? "Too large discrepancy between expected and measured ratios"
197 log_test "$desc"
198 log_info "Expected ratio $weights_ratio Measured ratio $packets_ratio"
199}
200
201multipath4_test()
202{
203 local desc="$1"
204 local weight_rp12=$2
205 local weight_rp13=$3
206 local t0_rp12 t0_rp13 t1_rp12 t1_rp13
207 local packets_rp12 packets_rp13
208
209 # Transmit multiple flows from h1 to h2 and make sure they are
210 # distributed between both multipath links (rp12 and rp13)
211 # according to the configured weights.
212 sysctl_set net.ipv4.fib_multipath_hash_policy 1
213 ip route replace 198.51.100.0/24 vrf vrf-r1 \
214 nexthop via 169.254.2.22 dev $rp12 weight $weight_rp12 \
215 nexthop via 169.254.3.23 dev $rp13 weight $weight_rp13
216
217 t0_rp12=$(link_stats_tx_packets_get $rp12)
218 t0_rp13=$(link_stats_tx_packets_get $rp13)
219
220 ip vrf exec vrf-h1 $MZ -q -p 64 -A 192.0.2.2 -B 198.51.100.2 \
221 -d 1msec -t udp "sp=1024,dp=0-32768"
222
223 t1_rp12=$(link_stats_tx_packets_get $rp12)
224 t1_rp13=$(link_stats_tx_packets_get $rp13)
225
226 let "packets_rp12 = $t1_rp12 - $t0_rp12"
227 let "packets_rp13 = $t1_rp13 - $t0_rp13"
228 multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
229
230 # Restore settings.
231 ip route replace 198.51.100.0/24 vrf vrf-r1 \
232 nexthop via 169.254.2.22 dev $rp12 \
233 nexthop via 169.254.3.23 dev $rp13
234 sysctl_restore net.ipv4.fib_multipath_hash_policy
235}
236
237multipath6_l4_test()
238{
239 local desc="$1"
240 local weight_rp12=$2
241 local weight_rp13=$3
242 local t0_rp12 t0_rp13 t1_rp12 t1_rp13
243 local packets_rp12 packets_rp13
244
245 # Transmit multiple flows from h1 to h2 and make sure they are
246 # distributed between both multipath links (rp12 and rp13)
247 # according to the configured weights.
248 sysctl_set net.ipv6.fib_multipath_hash_policy 1
249
250 ip route replace 2001:db8:2::/64 vrf vrf-r1 \
251 nexthop via fe80:2::22 dev $rp12 weight $weight_rp12 \
252 nexthop via fe80:3::23 dev $rp13 weight $weight_rp13
253
254 t0_rp12=$(link_stats_tx_packets_get $rp12)
255 t0_rp13=$(link_stats_tx_packets_get $rp13)
256
257 $MZ $h1 -6 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:2::2 \
258 -d 1msec -t udp "sp=1024,dp=0-32768"
259
260 t1_rp12=$(link_stats_tx_packets_get $rp12)
261 t1_rp13=$(link_stats_tx_packets_get $rp13)
262
263 let "packets_rp12 = $t1_rp12 - $t0_rp12"
264 let "packets_rp13 = $t1_rp13 - $t0_rp13"
265 multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
266
267 ip route replace 2001:db8:2::/64 vrf vrf-r1 \
268 nexthop via fe80:2::22 dev $rp12 \
269 nexthop via fe80:3::23 dev $rp13
270
271 sysctl_restore net.ipv6.fib_multipath_hash_policy
272}
273
274multipath6_test()
275{
276 local desc="$1"
277 local weight_rp12=$2
278 local weight_rp13=$3
279 local t0_rp12 t0_rp13 t1_rp12 t1_rp13
280 local packets_rp12 packets_rp13
281
282 ip route replace 2001:db8:2::/64 vrf vrf-r1 \
283 nexthop via fe80:2::22 dev $rp12 weight $weight_rp12 \
284 nexthop via fe80:3::23 dev $rp13 weight $weight_rp13
285
286 t0_rp12=$(link_stats_tx_packets_get $rp12)
287 t0_rp13=$(link_stats_tx_packets_get $rp13)
288
289 # Generate 16384 echo requests, each with a random flow label.
290 for _ in $(seq 1 16384); do
291 ip vrf exec vrf-h1 $PING6 2001:db8:2::2 -F 0 -c 1 -q &> /dev/null
292 done
293
294 t1_rp12=$(link_stats_tx_packets_get $rp12)
295 t1_rp13=$(link_stats_tx_packets_get $rp13)
296
297 let "packets_rp12 = $t1_rp12 - $t0_rp12"
298 let "packets_rp13 = $t1_rp13 - $t0_rp13"
299 multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
300
301 ip route replace 2001:db8:2::/64 vrf vrf-r1 \
302 nexthop via fe80:2::22 dev $rp12 \
303 nexthop via fe80:3::23 dev $rp13
304}
305
306multipath_test()
307{
308 log_info "Running IPv4 multipath tests"
309 multipath4_test "ECMP" 1 1
310 multipath4_test "Weighted MP 2:1" 2 1
311 multipath4_test "Weighted MP 11:45" 11 45
312
313 log_info "Running IPv6 multipath tests"
314 multipath6_test "ECMP" 1 1
315 multipath6_test "Weighted MP 2:1" 2 1
316 multipath6_test "Weighted MP 11:45" 11 45
317
318 log_info "Running IPv6 L4 hash multipath tests"
319 multipath6_l4_test "ECMP" 1 1
320 multipath6_l4_test "Weighted MP 2:1" 2 1
321 multipath6_l4_test "Weighted MP 11:45" 11 45
322}
323
324setup_prepare()
325{
326 h1=${NETIFS[p1]}
327 rp11=${NETIFS[p2]}
328
329 rp12=${NETIFS[p3]}
330 rp22=${NETIFS[p4]}
331
332 rp13=${NETIFS[p5]}
333 rp23=${NETIFS[p6]}
334
335 rp21=${NETIFS[p7]}
336 h2=${NETIFS[p8]}
337
338 vrf_prepare
339
340 h1_create
341 h2_create
342
343 router1_create
344 router2_create
345
346 forwarding_enable
347}
348
349cleanup()
350{
351 pre_cleanup
352
353 forwarding_restore
354
355 router2_destroy
356 router1_destroy
357
358 h2_destroy
359 h1_destroy
360
361 vrf_cleanup
362}
363
364ping_ipv4()
365{
366 ping_test $h1 198.51.100.2
367}
368
369ping_ipv6()
370{
371 ping6_test $h1 2001:db8:2::2
372}
373
374trap cleanup EXIT
375
376setup_prepare
377setup_wait
378
379tests_run
380
381exit $EXIT_STATUS