mirror_gre_changes.sh

  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 \
 76		"prot ip flower ip_prot icmp"
 77	tc filter add dev $h3 ingress pref 77 prot $prot \
 78		flower skip_hw ip_ttl 50 action pass
 79
 80	mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 0
 81
 82	ip link set dev $tundev type $type ttl 50
 83	sleep 2
 84	mirror_test v$h1 192.0.2.1 192.0.2.2 $h3 77 ">= 10"
 85
 86	ip link set dev $tundev type $type ttl 100
 87	tc filter del dev $h3 ingress pref 77
 88	mirror_uninstall $swp1 ingress
 89
 90	log_test "$what: TTL change"
 91}
 92
 93test_span_gre_tun_up()
 94{
 95	local tundev=$1; shift
 96	local what=$1; shift
 97
 98	RET=0
 99
100	ip link set dev $tundev down
101	mirror_install $swp1 ingress $tundev "matchall"
102	fail_test_span_gre_dir $tundev
103
104	ip link set dev $tundev up
105
106	quick_test_span_gre_dir $tundev
107	mirror_uninstall $swp1 ingress
108
109	log_test "$what: tunnel down/up"
110}
111
112test_span_gre_egress_up()
113{
114	local tundev=$1; shift
115	local remote_ip=$1; shift
116	local what=$1; shift
117
118	RET=0
119
120	ip link set dev $swp3 down
121	mirror_install $swp1 ingress $tundev "matchall"
122	fail_test_span_gre_dir $tundev
123
124	# After setting the device up, wait for neighbor to get resolved so that
125	# we can expect mirroring to work.
126	ip link set dev $swp3 up
127	setup_wait_dev $swp3
128	ping -c 1 -I $swp3 $remote_ip &>/dev/null
129
130	quick_test_span_gre_dir $tundev
131	mirror_uninstall $swp1 ingress
132
133	log_test "$what: egress down/up"
134}
135
136test_span_gre_remote_ip()
137{
138	local tundev=$1; shift
139	local type=$1; shift
140	local correct_ip=$1; shift
141	local wrong_ip=$1; shift
142	local what=$1; shift
143
144	RET=0
145
146	ip link set dev $tundev type $type remote $wrong_ip
147	mirror_install $swp1 ingress $tundev "matchall"
148	fail_test_span_gre_dir $tundev
149
150	ip link set dev $tundev type $type remote $correct_ip
151	quick_test_span_gre_dir $tundev
152	mirror_uninstall $swp1 ingress
153
154	log_test "$what: remote address change"
155}
156
157test_span_gre_tun_del()
158{
159	local tundev=$1; shift
160	local type=$1; shift
161	local flags=$1; shift
162	local local_ip=$1; shift
163	local remote_ip=$1; shift
164	local what=$1; shift
165
166	RET=0
167
168	mirror_install $swp1 ingress $tundev "matchall"
169	quick_test_span_gre_dir $tundev
170	ip link del dev $tundev
171	fail_test_span_gre_dir $tundev
172
173	tunnel_create $tundev $type $local_ip $remote_ip \
174		      ttl 100 tos inherit $flags
175
176	# Recreating the tunnel doesn't reestablish mirroring, so reinstall it
177	# and verify it works for the follow-up tests.
178	mirror_uninstall $swp1 ingress
179	mirror_install $swp1 ingress $tundev "matchall"
180	quick_test_span_gre_dir $tundev
181	mirror_uninstall $swp1 ingress
182
183	log_test "$what: tunnel deleted"
184}
185
186test_span_gre_route_del()
187{
188	local tundev=$1; shift
189	local edev=$1; shift
190	local route=$1; shift
191	local what=$1; shift
192
193	RET=0
194
195	mirror_install $swp1 ingress $tundev "matchall"
196	quick_test_span_gre_dir $tundev
197
198	ip route del $route dev $edev
199	fail_test_span_gre_dir $tundev
200
201	ip route add $route dev $edev
202	quick_test_span_gre_dir $tundev
203
204	mirror_uninstall $swp1 ingress
205
206	log_test "$what: underlay route removal"
207}
208
209test_ttl()
210{
211	test_span_gre_ttl gt4 gretap ip "mirror to gretap"
212	test_span_gre_ttl gt6 ip6gretap ipv6 "mirror to ip6gretap"
213}
214
215test_tun_up()
216{
217	test_span_gre_tun_up gt4 "mirror to gretap"
218	test_span_gre_tun_up gt6 "mirror to ip6gretap"
219}
220
221test_egress_up()
222{
223	test_span_gre_egress_up gt4 192.0.2.130 "mirror to gretap"
224	test_span_gre_egress_up gt6 2001:db8:2::2 "mirror to ip6gretap"
225}
226
227test_remote_ip()
228{
229	test_span_gre_remote_ip gt4 gretap 192.0.2.130 192.0.2.132 "mirror to gretap"
230	test_span_gre_remote_ip gt6 ip6gretap 2001:db8:2::2 2001:db8:2::4 "mirror to ip6gretap"
231}
232
233test_tun_del()
234{
235	test_span_gre_tun_del gt4 gretap "" \
236			      192.0.2.129 192.0.2.130 "mirror to gretap"
237	test_span_gre_tun_del gt6 ip6gretap allow-localremote \
238			      2001:db8:2::1 2001:db8:2::2 "mirror to ip6gretap"
239}
240
241test_route_del()
242{
243	test_span_gre_route_del gt4 $swp3 192.0.2.128/28 "mirror to gretap"
244	test_span_gre_route_del gt6 $swp3 2001:db8:2::/64 "mirror to ip6gretap"
245}
246
247trap cleanup EXIT
248
249setup_prepare
250setup_wait
251
252tests_run
253
254exit $EXIT_STATUS