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
58 ALL_TESTS="
59 ping_ipv4
60 multipath_ipv4
61 "
62
63 NUM_NETIFS=6
64 source lib.sh
65
66 h1_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
72 h1_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
78 sw1_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$ol1 192.0.2.16/28 \
94 nexthop dev g1a \
95 nexthop dev g1b
96 }
97
98 sw1_destroy()
99 {
100 ip route del vrf v$ol1 192.0.2.16/28
101
102 ip route del vrf v$ol1 192.0.2.82/32 via 192.0.2.146
103 __simple_if_fini g1b 192.0.2.81/32
104 tunnel_destroy g1b
105
106 ip route del vrf v$ol1 192.0.2.66/32 via 192.0.2.130
107 __simple_if_fini g1a 192.0.2.65/32
108 tunnel_destroy g1a
109
110 vlan_destroy $ul1 222
111 vlan_destroy $ul1 111
112 __simple_if_fini $ul1
113 simple_if_fini $ol1 192.0.2.2/28
114 }
115
116 sw2_create()
117 {
118 simple_if_init $ol2 192.0.2.17/28
119 __simple_if_init $ul2 v$ol2
120 vlan_create $ul2 111 v$ol2 192.0.2.130/28
121 vlan_create $ul2 222 v$ol2 192.0.2.146/28
122
123 tunnel_create g2a gre 192.0.2.66 192.0.2.65 tos inherit dev v$ol2
124 __simple_if_init g2a v$ol2 192.0.2.66/32
125 ip route add vrf v$ol2 192.0.2.65/32 via 192.0.2.129
126
127 tunnel_create g2b gre 192.0.2.82 192.0.2.81 tos inherit dev v$ol2
128 __simple_if_init g2b v$ol2 192.0.2.82/32
129 ip route add vrf v$ol2 192.0.2.81/32 via 192.0.2.145
130
131 ip route add vrf v$ol2 192.0.2.0/28 \
132 nexthop dev g2a \
133 nexthop dev g2b
134
135 tc qdisc add dev $ul2 clsact
136 tc filter add dev $ul2 ingress pref 111 prot 802.1Q \
137 flower vlan_id 111 action pass
138 tc filter add dev $ul2 ingress pref 222 prot 802.1Q \
139 flower vlan_id 222 action pass
140 }
141
142 sw2_destroy()
143 {
144 tc qdisc del dev $ul2 clsact
145
146 ip route del vrf v$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
162 h2_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
168 h2_destroy()
169 {
170 ip route del vrf v$h2 192.0.2.0/28 via 192.0.2.17
171 simple_if_fini $h2 192.0.2.18/28
172 }
173
174 setup_prepare()
175 {
176 h1=${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 forwarding_enable
192 }
193
194 cleanup()
195 {
196 pre_cleanup
197
198 forwarding_restore
199
200 h2_destroy
201 sw2_destroy
202 sw1_destroy
203 h1_destroy
204 vrf_cleanup
205 }
206
207 multipath4_test()
208 {
209 local what=$1; shift
210 local weight1=$1; shift
211 local weight2=$1; shift
212
213 sysctl_set net.ipv4.fib_multipath_hash_policy 1
214 ip route replace vrf v$ol1 192.0.2.16/28 \
215 nexthop dev g1a weight $weight1 \
216 nexthop dev g1b weight $weight2
217
218 local t0_111=$(tc_rule_stats_get $ul2 111 ingress)
219 local t0_222=$(tc_rule_stats_get $ul2 222 ingress)
220
221 ip vrf exec v$h1 \
222 $MZ $h1 -q -p 64 -A 192.0.2.1 -B 192.0.2.18 \
223 -d $MZ_DELAY -t udp "sp=1024,dp=0-32768"
224
225 local t1_111=$(tc_rule_stats_get $ul2 111 ingress)
226 local t1_222=$(tc_rule_stats_get $ul2 222 ingress)
227
228 local d111=$((t1_111 - t0_111))
229 local d222=$((t1_222 - t0_222))
230 multipath_eval "$what" $weight1 $weight2 $d111 $d222
231
232 ip route replace vrf v$ol1 192.0.2.16/28 \
233 nexthop dev g1a \
234 nexthop dev g1b
235 sysctl_restore net.ipv4.fib_multipath_hash_policy
236 }
237
238 ping_ipv4()
239 {
240 ping_test $h1 192.0.2.18
241 }
242
243 multipath_ipv4()
244 {
245 log_info "Running IPv4 multipath tests"
246 multipath4_test "ECMP" 1 1
247 multipath4_test "Weighted MP 2:1" 2 1
248 multipath4_test "Weighted MP 11:45" 11 45
249 }
250
251 trap cleanup EXIT
252
253 setup_prepare
254 setup_wait
255 tests_run
256
257 exit $EXIT_STATUS
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