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
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# +-------------------|-----+
12# |
13# +-------------------|------------------------+
14# | SW1 | |
15# | $ol1 + |
16# | 192.0.2.2/28 |
17# | |
18# | + g1a (gre) + g1b (gre) |
19# | loc=192.0.2.65 loc=192.0.2.81 |
20# | rem=192.0.2.66 --. rem=192.0.2.82 --. |
21# | tos=inherit | tos=inherit | |
22# | .------------------' | |
23# | | .------------------' |
24# | v v |
25# | + $ul1.111 (vlan) + $ul1.222 (vlan) |
26# | | 192.0.2.129/28 | 192.0.2.145/28 |
27# | \ / |
28# | \________________/ |
29# | | |
30# | + $ul1 |
31# +------------|-------------------------------+
32# |
33# +------------|-------------------------------+
34# | SW2 + $ul2 |
35# | _______|________ |
36# | / \ |
37# | / \ |
38# | + $ul2.111 (vlan) + $ul2.222 (vlan) |
39# | ^ 192.0.2.130/28 ^ 192.0.2.146/28 |
40# | | | |
41# | | '------------------. |
42# | '------------------. | |
43# | + g2a (gre) | + g2b (gre) | |
44# | loc=192.0.2.66 | loc=192.0.2.82 | |
45# | rem=192.0.2.65 --' rem=192.0.2.81 --' |
46# | tos=inherit tos=inherit |
47# | |
48# | $ol2 + |
49# | 192.0.2.17/28 | |
50# +-------------------|------------------------+
51# |
52# +-------------------|-----+
53# | H2 | |
54# | $h2 + |
55# | 192.0.2.18/28 |
56# +-------------------------+
57
58ALL_TESTS="
59 ping_ipv4
60 multipath_ipv4
61"
62
63NUM_NETIFS=6
64source lib.sh
65
66h1_create()
67{
68 simple_if_init $h1 192.0.2.1/28 2001:db8:1::1/64
69 ip route add vrf v$h1 192.0.2.16/28 via 192.0.2.2
70}
71
72h1_destroy()
73{
74 ip route del vrf v$h1 192.0.2.16/28 via 192.0.2.2
75 simple_if_fini $h1 192.0.2.1/28
76}
77
78sw1_create()
79{
80 simple_if_init $ol1 192.0.2.2/28
81 __simple_if_init $ul1 v$ol1
82 vlan_create $ul1 111 v$ol1 192.0.2.129/28
83 vlan_create $ul1 222 v$ol1 192.0.2.145/28
84
85 tunnel_create g1a gre 192.0.2.65 192.0.2.66 tos inherit dev v$ol1
86 __simple_if_init g1a v$ol1 192.0.2.65/32
87 ip route add vrf v$ol1 192.0.2.66/32 via 192.0.2.130
88
89 tunnel_create g1b gre 192.0.2.81 192.0.2.82 tos inherit dev v$ol1
90 __simple_if_init g1b v$ol1 192.0.2.81/32
91 ip route add vrf v$ol1 192.0.2.82/32 via 192.0.2.146
92
93 ip route add vrf v$ol1 192.0.2.16/28 \
94 nexthop dev g1a \
95 nexthop dev g1b
96
97 tc qdisc add dev $ul1 clsact
98 tc filter add dev $ul1 egress pref 111 prot ipv4 \
99 flower dst_ip 192.0.2.66 action pass
100 tc filter add dev $ul1 egress pref 222 prot ipv4 \
101 flower dst_ip 192.0.2.82 action pass
102}
103
104sw1_destroy()
105{
106 tc qdisc del dev $ul1 clsact
107
108 ip route del vrf v$ol1 192.0.2.16/28
109
110 ip route del vrf v$ol1 192.0.2.82/32 via 192.0.2.146
111 __simple_if_fini g1b 192.0.2.81/32
112 tunnel_destroy g1b
113
114 ip route del vrf v$ol1 192.0.2.66/32 via 192.0.2.130
115 __simple_if_fini g1a 192.0.2.65/32
116 tunnel_destroy g1a
117
118 vlan_destroy $ul1 222
119 vlan_destroy $ul1 111
120 __simple_if_fini $ul1
121 simple_if_fini $ol1 192.0.2.2/28
122}
123
124sw2_create()
125{
126 simple_if_init $ol2 192.0.2.17/28
127 __simple_if_init $ul2 v$ol2
128 vlan_create $ul2 111 v$ol2 192.0.2.130/28
129 vlan_create $ul2 222 v$ol2 192.0.2.146/28
130
131 tunnel_create g2a gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol2
132 __simple_if_init g2a v$ol2 192.0.2.66/32
133 ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129
134
135 tunnel_create g2b gre 192.0.2.82 192.0.2.81 tos inherit dev v$ol2
136 __simple_if_init g2b v$ol2 192.0.2.82/32
137 ip route add vrf v$ol2 192.0.2.81/32 via 192.0.2.145
138
139 ip route add vrf v$ol2 192.0.2.0/28 \
140 nexthop dev g2a \
141 nexthop dev g2b
142}
143
144sw2_destroy()
145{
146 ip route del vrf v$ol2 192.0.2.0/28
147
148 ip route del vrf v$ol2 192.0.2.81/32 via 192.0.2.145
149 __simple_if_fini g2b 192.0.2.82/32
150 tunnel_destroy g2b
151
152 ip route del vrf v$ol2 192.0.2.65/32 via 192.0.2.129
153 __simple_if_fini g2a 192.0.2.66/32
154 tunnel_destroy g2a
155
156 vlan_destroy $ul2 222
157 vlan_destroy $ul2 111
158 __simple_if_fini $ul2
159 simple_if_fini $ol2 192.0.2.17/28
160}
161
162h2_create()
163{
164 simple_if_init $h2 192.0.2.18/28
165 ip route add vrf v$h2 192.0.2.0/28 via 192.0.2.17
166}
167
168h2_destroy()
169{
170 ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
171 simple_if_fini $h2 192.0.2.18/28
172}
173
174setup_prepare()
175{
176 h1=${NETIFS[p1]}
177 ol1=${NETIFS[p2]}
178
179 ul1=${NETIFS[p3]}
180 ul2=${NETIFS[p4]}
181
182 ol2=${NETIFS[p5]}
183 h2=${NETIFS[p6]}
184
185 vrf_prepare
186 h1_create
187 sw1_create
188 sw2_create
189 h2_create
190}
191
192cleanup()
193{
194 pre_cleanup
195
196 h2_destroy
197 sw2_destroy
198 sw1_destroy
199 h1_destroy
200 vrf_cleanup
201}
202
203multipath4_test()
204{
205 local what=$1; shift
206 local weight1=$1; shift
207 local weight2=$1; shift
208
209 sysctl_set net.ipv4.fib_multipath_hash_policy 1
210 ip route replace vrf v$ol1 192.0.2.16/28 \
211 nexthop dev g1a weight $weight1 \
212 nexthop dev g1b weight $weight2
213
214 local t0_111=$(tc_rule_stats_get $ul1 111 egress)
215 local t0_222=$(tc_rule_stats_get $ul1 222 egress)
216
217 ip vrf exec v$h1 \
218 $MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \
219 -d 1msec -t udp "sp=1024,dp=0-32768"
220
221 local t1_111=$(tc_rule_stats_get $ul1 111 egress)
222 local t1_222=$(tc_rule_stats_get $ul1 222 egress)
223
224 local d111=$((t1_111 - t0_111))
225 local d222=$((t1_222 - t0_222))
226 multipath_eval "$what" $weight1 $weight2 $d111 $d222
227
228 ip route replace vrf v$ol1 192.0.2.16/28 \
229 nexthop dev g1a \
230 nexthop dev g1b
231 sysctl_restore net.ipv4.fib_multipath_hash_policy
232}
233
234ping_ipv4()
235{
236 ping_test $h1 192.0.2.18
237}
238
239multipath_ipv4()
240{
241 log_info "Running IPv4 multipath tests"
242 multipath4_test "ECMP" 1 1
243 multipath4_test "Weighted MP 2:1" 2 1
244 multipath4_test "Weighted MP 11:45" 11 45
245}
246
247trap cleanup EXIT
248
249setup_prepare
250setup_wait
251tests_run
252
253exit $EXIT_STATUS