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
4NUM_NETIFS=8
5source lib.sh
6
7h1_create()
8{
9 vrf_create "vrf-h1"
10 ip link set dev $h1 master vrf-h1
11
12 ip link set dev vrf-h1 up
13 ip link set dev $h1 up
14
15 ip address add 192.0.2.2/24 dev $h1
16 ip address add 2001:db8:1::2/64 dev $h1
17
18 ip route add 198.51.100.0/24 vrf vrf-h1 nexthop via 192.0.2.1
19 ip route add 2001:db8:2::/64 vrf vrf-h1 nexthop via 2001:db8:1::1
20}
21
22h1_destroy()
23{
24 ip route del 2001:db8:2::/64 vrf vrf-h1
25 ip route del 198.51.100.0/24 vrf vrf-h1
26
27 ip address del 2001:db8:1::2/64 dev $h1
28 ip address del 192.0.2.2/24 dev $h1
29
30 ip link set dev $h1 down
31 vrf_destroy "vrf-h1"
32}
33
34h2_create()
35{
36 vrf_create "vrf-h2"
37 ip link set dev $h2 master vrf-h2
38
39 ip link set dev vrf-h2 up
40 ip link set dev $h2 up
41
42 ip address add 198.51.100.2/24 dev $h2
43 ip address add 2001:db8:2::2/64 dev $h2
44
45 ip route add 192.0.2.0/24 vrf vrf-h2 nexthop via 198.51.100.1
46 ip route add 2001:db8:1::/64 vrf vrf-h2 nexthop via 2001:db8:2::1
47}
48
49h2_destroy()
50{
51 ip route del 2001:db8:1::/64 vrf vrf-h2
52 ip route del 192.0.2.0/24 vrf vrf-h2
53
54 ip address del 2001:db8:2::2/64 dev $h2
55 ip address del 198.51.100.2/24 dev $h2
56
57 ip link set dev $h2 down
58 vrf_destroy "vrf-h2"
59}
60
61router1_create()
62{
63 vrf_create "vrf-r1"
64 ip link set dev $rp11 master vrf-r1
65 ip link set dev $rp12 master vrf-r1
66 ip link set dev $rp13 master vrf-r1
67
68 ip link set dev vrf-r1 up
69 ip link set dev $rp11 up
70 ip link set dev $rp12 up
71 ip link set dev $rp13 up
72
73 ip address add 192.0.2.1/24 dev $rp11
74 ip address add 2001:db8:1::1/64 dev $rp11
75
76 ip address add 169.254.2.12/24 dev $rp12
77 ip address add fe80:2::12/64 dev $rp12
78
79 ip address add 169.254.3.13/24 dev $rp13
80 ip address add fe80:3::13/64 dev $rp13
81
82 ip route add 198.51.100.0/24 vrf vrf-r1 \
83 nexthop via 169.254.2.22 dev $rp12 \
84 nexthop via 169.254.3.23 dev $rp13
85 ip route add 2001:db8:2::/64 vrf vrf-r1 \
86 nexthop via fe80:2::22 dev $rp12 \
87 nexthop via fe80:3::23 dev $rp13
88}
89
90router1_destroy()
91{
92 ip route del 2001:db8:2::/64 vrf vrf-r1
93 ip route del 198.51.100.0/24 vrf vrf-r1
94
95 ip address del fe80:3::13/64 dev $rp13
96 ip address del 169.254.3.13/24 dev $rp13
97
98 ip address del fe80:2::12/64 dev $rp12
99 ip address del 169.254.2.12/24 dev $rp12
100
101 ip address del 2001:db8:1::1/64 dev $rp11
102 ip address del 192.0.2.1/24 dev $rp11
103
104 ip link set dev $rp13 down
105 ip link set dev $rp12 down
106 ip link set dev $rp11 down
107
108 vrf_destroy "vrf-r1"
109}
110
111router2_create()
112{
113 vrf_create "vrf-r2"
114 ip link set dev $rp21 master vrf-r2
115 ip link set dev $rp22 master vrf-r2
116 ip link set dev $rp23 master vrf-r2
117
118 ip link set dev vrf-r2 up
119 ip link set dev $rp21 up
120 ip link set dev $rp22 up
121 ip link set dev $rp23 up
122
123 ip address add 198.51.100.1/24 dev $rp21
124 ip address add 2001:db8:2::1/64 dev $rp21
125
126 ip address add 169.254.2.22/24 dev $rp22
127 ip address add fe80:2::22/64 dev $rp22
128
129 ip address add 169.254.3.23/24 dev $rp23
130 ip address add fe80:3::23/64 dev $rp23
131
132 ip route add 192.0.2.0/24 vrf vrf-r2 \
133 nexthop via 169.254.2.12 dev $rp22 \
134 nexthop via 169.254.3.13 dev $rp23
135 ip route add 2001:db8:1::/64 vrf vrf-r2 \
136 nexthop via fe80:2::12 dev $rp22 \
137 nexthop via fe80:3::13 dev $rp23
138}
139
140router2_destroy()
141{
142 ip route del 2001:db8:1::/64 vrf vrf-r2
143 ip route del 192.0.2.0/24 vrf vrf-r2
144
145 ip address del fe80:3::23/64 dev $rp23
146 ip address del 169.254.3.23/24 dev $rp23
147
148 ip address del fe80:2::22/64 dev $rp22
149 ip address del 169.254.2.22/24 dev $rp22
150
151 ip address del 2001:db8:2::1/64 dev $rp21
152 ip address del 198.51.100.1/24 dev $rp21
153
154 ip link set dev $rp23 down
155 ip link set dev $rp22 down
156 ip link set dev $rp21 down
157
158 vrf_destroy "vrf-r2"
159}
160
161multipath_eval()
162{
163 local desc="$1"
164 local weight_rp12=$2
165 local weight_rp13=$3
166 local packets_rp12=$4
167 local packets_rp13=$5
168 local weights_ratio packets_ratio diff
169
170 RET=0
171
172 if [[ "$packets_rp12" -eq "0" || "$packets_rp13" -eq "0" ]]; then
173 check_err 1 "Packet difference is 0"
174 log_test "Multipath"
175 log_info "Expected ratio $weights_ratio"
176 return
177 fi
178
179 if [[ "$weight_rp12" -gt "$weight_rp13" ]]; then
180 weights_ratio=$(echo "scale=2; $weight_rp12 / $weight_rp13" \
181 | bc -l)
182 packets_ratio=$(echo "scale=2; $packets_rp12 / $packets_rp13" \
183 | bc -l)
184 else
185 weights_ratio=$(echo "scale=2; $weight_rp13 / $weight_rp12" | \
186 bc -l)
187 packets_ratio=$(echo "scale=2; $packets_rp13 / $packets_rp12" | \
188 bc -l)
189 fi
190
191 diff=$(echo $weights_ratio - $packets_ratio | bc -l)
192 diff=${diff#-}
193
194 test "$(echo "$diff / $weights_ratio > 0.1" | bc -l)" -eq 0
195 check_err $? "Too large discrepancy between expected and measured ratios"
196 log_test "$desc"
197 log_info "Expected ratio $weights_ratio Measured ratio $packets_ratio"
198}
199
200multipath4_test()
201{
202 local desc="$1"
203 local weight_rp12=$2
204 local weight_rp13=$3
205 local t0_rp12 t0_rp13 t1_rp12 t1_rp13
206 local packets_rp12 packets_rp13
207 local hash_policy
208
209 # Transmit multiple flows from h1 to h2 and make sure they are
210 # distributed between both multipath links (rp12 and rp13)
211 # according to the configured weights.
212 hash_policy=$(sysctl -n net.ipv4.fib_multipath_hash_policy)
213 sysctl -q -w net.ipv4.fib_multipath_hash_policy=1
214 ip route replace 198.51.100.0/24 vrf vrf-r1 \
215 nexthop via 169.254.2.22 dev $rp12 weight $weight_rp12 \
216 nexthop via 169.254.3.23 dev $rp13 weight $weight_rp13
217
218 t0_rp12=$(link_stats_tx_packets_get $rp12)
219 t0_rp13=$(link_stats_tx_packets_get $rp13)
220
221 ip vrf exec vrf-h1 $MZ -q -p 64 -A 192.0.2.2 -B 198.51.100.2 \
222 -d 1msec -t udp "sp=1024,dp=0-32768"
223
224 t1_rp12=$(link_stats_tx_packets_get $rp12)
225 t1_rp13=$(link_stats_tx_packets_get $rp13)
226
227 let "packets_rp12 = $t1_rp12 - $t0_rp12"
228 let "packets_rp13 = $t1_rp13 - $t0_rp13"
229 multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
230
231 # Restore settings.
232 ip route replace 198.51.100.0/24 vrf vrf-r1 \
233 nexthop via 169.254.2.22 dev $rp12 \
234 nexthop via 169.254.3.23 dev $rp13
235 sysctl -q -w net.ipv4.fib_multipath_hash_policy=$hash_policy
236}
237
238multipath6_l4_test()
239{
240 local desc="$1"
241 local weight_rp12=$2
242 local weight_rp13=$3
243 local t0_rp12 t0_rp13 t1_rp12 t1_rp13
244 local packets_rp12 packets_rp13
245 local hash_policy
246
247 # Transmit multiple flows from h1 to h2 and make sure they are
248 # distributed between both multipath links (rp12 and rp13)
249 # according to the configured weights.
250 hash_policy=$(sysctl -n net.ipv6.fib_multipath_hash_policy)
251 sysctl -q -w net.ipv6.fib_multipath_hash_policy=1
252
253 ip route replace 2001:db8:2::/64 vrf vrf-r1 \
254 nexthop via fe80:2::22 dev $rp12 weight $weight_rp12 \
255 nexthop via fe80:3::23 dev $rp13 weight $weight_rp13
256
257 t0_rp12=$(link_stats_tx_packets_get $rp12)
258 t0_rp13=$(link_stats_tx_packets_get $rp13)
259
260 $MZ $h1 -6 -q -p 64 -A 2001:db8:1::2 -B 2001:db8:2::2 \
261 -d 1msec -t udp "sp=1024,dp=0-32768"
262
263 t1_rp12=$(link_stats_tx_packets_get $rp12)
264 t1_rp13=$(link_stats_tx_packets_get $rp13)
265
266 let "packets_rp12 = $t1_rp12 - $t0_rp12"
267 let "packets_rp13 = $t1_rp13 - $t0_rp13"
268 multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
269
270 ip route replace 2001:db8:2::/64 vrf vrf-r1 \
271 nexthop via fe80:2::22 dev $rp12 \
272 nexthop via fe80:3::23 dev $rp13
273
274 sysctl -q -w net.ipv6.fib_multipath_hash_policy=$hash_policy
275}
276
277multipath6_test()
278{
279 local desc="$1"
280 local weight_rp12=$2
281 local weight_rp13=$3
282 local t0_rp12 t0_rp13 t1_rp12 t1_rp13
283 local packets_rp12 packets_rp13
284
285 ip route replace 2001:db8:2::/64 vrf vrf-r1 \
286 nexthop via fe80:2::22 dev $rp12 weight $weight_rp12 \
287 nexthop via fe80:3::23 dev $rp13 weight $weight_rp13
288
289 t0_rp12=$(link_stats_tx_packets_get $rp12)
290 t0_rp13=$(link_stats_tx_packets_get $rp13)
291
292 # Generate 16384 echo requests, each with a random flow label.
293 for _ in $(seq 1 16384); do
294 ip vrf exec vrf-h1 $PING6 2001:db8:2::2 -F 0 -c 1 -q &> /dev/null
295 done
296
297 t1_rp12=$(link_stats_tx_packets_get $rp12)
298 t1_rp13=$(link_stats_tx_packets_get $rp13)
299
300 let "packets_rp12 = $t1_rp12 - $t0_rp12"
301 let "packets_rp13 = $t1_rp13 - $t0_rp13"
302 multipath_eval "$desc" $weight_rp12 $weight_rp13 $packets_rp12 $packets_rp13
303
304 ip route replace 2001:db8:2::/64 vrf vrf-r1 \
305 nexthop via fe80:2::22 dev $rp12 \
306 nexthop via fe80:3::23 dev $rp13
307}
308
309multipath_test()
310{
311 log_info "Running IPv4 multipath tests"
312 multipath4_test "ECMP" 1 1
313 multipath4_test "Weighted MP 2:1" 2 1
314 multipath4_test "Weighted MP 11:45" 11 45
315
316 log_info "Running IPv6 multipath tests"
317 multipath6_test "ECMP" 1 1
318 multipath6_test "Weighted MP 2:1" 2 1
319 multipath6_test "Weighted MP 11:45" 11 45
320
321 log_info "Running IPv6 L4 hash multipath tests"
322 multipath6_l4_test "ECMP" 1 1
323 multipath6_l4_test "Weighted MP 2:1" 2 1
324 multipath6_l4_test "Weighted MP 11:45" 11 45
325}
326
327setup_prepare()
328{
329 h1=${NETIFS[p1]}
330 rp11=${NETIFS[p2]}
331
332 rp12=${NETIFS[p3]}
333 rp22=${NETIFS[p4]}
334
335 rp13=${NETIFS[p5]}
336 rp23=${NETIFS[p6]}
337
338 rp21=${NETIFS[p7]}
339 h2=${NETIFS[p8]}
340
341 vrf_prepare
342
343 h1_create
344 h2_create
345
346 router1_create
347 router2_create
348
349 forwarding_enable
350}
351
352cleanup()
353{
354 pre_cleanup
355
356 forwarding_restore
357
358 router2_destroy
359 router1_destroy
360
361 h2_destroy
362 h1_destroy
363
364 vrf_cleanup
365}
366
367trap cleanup EXIT
368
369setup_prepare
370setup_wait
371
372ping_test $h1 198.51.100.2
373ping6_test $h1 2001:db8:2::2
374multipath_test
375
376exit $EXIT_STATUS