1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4# This test uses standard topology for testing gretap. See
5# mirror_gre_topo_lib.sh for more details.
6#
7# Test how mirrors to gretap and ip6gretap react to changes to relevant
8# configuration.
9
10ALL_TESTS="
11	test_ttl
12	test_tun_up
13	test_egress_up
14	test_remote_ip
15	test_tun_del
16	test_route_del
17"
18
19NUM_NETIFS=6
20source lib.sh
21source mirror_lib.sh
22source mirror_gre_lib.sh
23source mirror_gre_topo_lib.sh
24
25setup_prepare()
26{
27	h1=${NETIFS[p1]}
28	swp1=${NETIFS[p2]}
29
30	swp2=${NETIFS[p3]}
31	h2=${NETIFS[p4]}
32
33	swp3=${NETIFS[p5]}
34	h3=${NETIFS[p6]}
35
36	vrf_prepare
37	mirror_gre_topo_create
38
39	# This test downs $swp3, which deletes the configured IPv6 address
40	# unless this sysctl is set.
41	sysctl_set net.ipv6.conf.$swp3.keep_addr_on_down 1
42
43	ip address add dev $swp3 192.0.2.129/28
44	ip address add dev $h3 192.0.2.130/28
45
46	ip address add dev $swp3 2001:db8:2::1/64
47	ip address add dev $h3 2001:db8:2::2/64
48}
49
50cleanup()
51{
52	pre_cleanup
53
54	ip address del dev $h3 2001:db8:2::2/64
55	ip address del dev $swp3 2001:db8:2::1/64
56
57	ip address del dev $h3 192.0.2.130/28
58	ip address del dev $swp3 192.0.2.129/28
59
60	sysctl_restore net.ipv6.conf.$swp3.keep_addr_on_down
61
62	mirror_gre_topo_destroy
63	vrf_cleanup
64}
65
66test_span_gre_ttl()
67{
68	local tundev=$1; shift
69	local type=$1; shift
70	local prot=$1; shift
71	local what=$1; shift
72
73	RET=0
74
75	mirror_install $swp1 ingress $tundev "matchall $tcflags"
76	tc filter add dev $h3 ingress pref 77 prot $prot \
77		flower skip_hw ip_ttl 50 action pass
78
79	mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 0
80
81	ip link set dev $tundev type $type ttl 50
82	sleep 2
83	mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 10
84
85	ip link set dev $tundev type $type ttl 100
86	tc filter del dev $h3 ingress pref 77
87	mirror_uninstall $swp1 ingress
88
89	log_test "$what: TTL change ($tcflags)"
90}
91
92test_span_gre_tun_up()
93{
94	local tundev=$1; shift
95	local what=$1; shift
96
97	RET=0
98
99	ip link set dev $tundev down
100	mirror_install $swp1 ingress $tundev "matchall $tcflags"
101	fail_test_span_gre_dir $tundev ingress
102
103	ip link set dev $tundev up
104
105	quick_test_span_gre_dir $tundev ingress
106	mirror_uninstall $swp1 ingress
107
108	log_test "$what: tunnel down/up ($tcflags)"
109}
110
111test_span_gre_egress_up()
112{
113	local tundev=$1; shift
114	local remote_ip=$1; shift
115	local what=$1; shift
116
117	RET=0
118
119	ip link set dev $swp3 down
120	mirror_install $swp1 ingress $tundev "matchall $tcflags"
121	fail_test_span_gre_dir $tundev ingress
122
123	# After setting the device up, wait for neighbor to get resolved so that
124	# we can expect mirroring to work.
125	ip link set dev $swp3 up
126	setup_wait_dev $swp3
127	ping -c 1 -I $swp3 $remote_ip &>/dev/null
128
129	quick_test_span_gre_dir $tundev ingress
130	mirror_uninstall $swp1 ingress
131
132	log_test "$what: egress down/up ($tcflags)"
133}
134
135test_span_gre_remote_ip()
136{
137	local tundev=$1; shift
138	local type=$1; shift
139	local correct_ip=$1; shift
140	local wrong_ip=$1; shift
141	local what=$1; shift
142
143	RET=0
144
145	ip link set dev $tundev type $type remote $wrong_ip
146	mirror_install $swp1 ingress $tundev "matchall $tcflags"
147	fail_test_span_gre_dir $tundev ingress
148
149	ip link set dev $tundev type $type remote $correct_ip
150	quick_test_span_gre_dir $tundev ingress
151	mirror_uninstall $swp1 ingress
152
153	log_test "$what: remote address change ($tcflags)"
154}
155
156test_span_gre_tun_del()
157{
158	local tundev=$1; shift
159	local type=$1; shift
160	local flags=$1; shift
161	local local_ip=$1; shift
162	local remote_ip=$1; shift
163	local what=$1; shift
164
165	RET=0
166
167	mirror_install $swp1 ingress $tundev "matchall $tcflags"
168	quick_test_span_gre_dir $tundev ingress
169	ip link del dev $tundev
170	fail_test_span_gre_dir $tundev ingress
171
172	tunnel_create $tundev $type $local_ip $remote_ip \
173		      ttl 100 tos inherit $flags
174
175	# Recreating the tunnel doesn't reestablish mirroring, so reinstall it
176	# and verify it works for the follow-up tests.
177	mirror_uninstall $swp1 ingress
178	mirror_install $swp1 ingress $tundev "matchall $tcflags"
179	quick_test_span_gre_dir $tundev ingress
180	mirror_uninstall $swp1 ingress
181
182	log_test "$what: tunnel deleted ($tcflags)"
183}
184
185test_span_gre_route_del()
186{
187	local tundev=$1; shift
188	local edev=$1; shift
189	local route=$1; shift
190	local what=$1; shift
191
192	RET=0
193
194	mirror_install $swp1 ingress $tundev "matchall $tcflags"
195	quick_test_span_gre_dir $tundev ingress
196
197	ip route del $route dev $edev
198	fail_test_span_gre_dir $tundev ingress
199
200	ip route add $route dev $edev
201	quick_test_span_gre_dir $tundev ingress
202
203	mirror_uninstall $swp1 ingress
204
205	log_test "$what: underlay route removal ($tcflags)"
206}
207
208test_ttl()
209{
210	test_span_gre_ttl gt4 gretap ip "mirror to gretap"
211	test_span_gre_ttl gt6 ip6gretap ipv6 "mirror to ip6gretap"
212}
213
214test_tun_up()
215{
216	test_span_gre_tun_up gt4 "mirror to gretap"
217	test_span_gre_tun_up gt6 "mirror to ip6gretap"
218}
219
220test_egress_up()
221{
222	test_span_gre_egress_up gt4 192.0.2.130 "mirror to gretap"
223	test_span_gre_egress_up gt6 2001:db8:2::2 "mirror to ip6gretap"
224}
225
226test_remote_ip()
227{
228	test_span_gre_remote_ip gt4 gretap 192.0.2.130 192.0.2.132 "mirror to gretap"
229	test_span_gre_remote_ip gt6 ip6gretap 2001:db8:2::2 2001:db8:2::4 "mirror to ip6gretap"
230}
231
232test_tun_del()
233{
234	test_span_gre_tun_del gt4 gretap "" \
235			      192.0.2.129 192.0.2.130 "mirror to gretap"
236	test_span_gre_tun_del gt6 ip6gretap allow-localremote \
237			      2001:db8:2::1 2001:db8:2::2 "mirror to ip6gretap"
238}
239
240test_route_del()
241{
242	test_span_gre_route_del gt4 $swp3 192.0.2.128/28 "mirror to gretap"
243	test_span_gre_route_del gt6 $swp3 2001:db8:2::/64 "mirror to ip6gretap"
244}
245
246test_all()
247{
248	slow_path_trap_install $swp1 ingress
249	slow_path_trap_install $swp1 egress
250
251	tests_run
252
253	slow_path_trap_uninstall $swp1 egress
254	slow_path_trap_uninstall $swp1 ingress
255}
256
257trap cleanup EXIT
258
259setup_prepare
260setup_wait
261
262tcflags="skip_hw"
263test_all
264
265if ! tc_offload_check; then
266	echo "WARN: Could not test offloaded functionality"
267else
268	tcflags="skip_sw"
269	test_all
270fi
271
272exit $EXIT_STATUS
273