devlink_trap_tunnel_ipip.sh

  1#!/bin/bash
  2# SPDX-License-Identifier: GPL-2.0
  3#
  4# Test devlink-trap tunnel exceptions functionality over mlxsw.
  5# Check all exception traps to make sure they are triggered under the right
  6# conditions.
  7
  8# +-------------------------+
  9# | H1                      |
 10# |               $h1 +     |
 11# |      192.0.2.1/28 |     |
 12# +-------------------|-----+
 13#                     |
 14# +-------------------|-----+
 15# | SW1               |     |
 16# |             $swp1 +     |
 17# |      192.0.2.2/28       |
 18# |                         |
 19# |  + g1a (gre)            |
 20# |    loc=192.0.2.65       |
 21# |    rem=192.0.2.66       |
 22# |    tos=inherit          |
 23# |                         |
 24# |  + $rp1                 |
 25# |  |  198.51.100.1/28     |
 26# +--|----------------------+
 27#    |
 28# +--|----------------------+
 29# |  |                 VRF2 |
 30# |  + $rp2                 |
 31# |    198.51.100.2/28      |
 32# +-------------------------+
 33
 34lib_dir=$(dirname $0)/../../../net/forwarding
 35
 36ALL_TESTS="
 37	decap_error_test
 38"
 39
 40NUM_NETIFS=4
 41source $lib_dir/lib.sh
 42source $lib_dir/tc_common.sh
 43source $lib_dir/devlink_lib.sh
 44
 45h1_create()
 46{
 47	simple_if_init $h1 192.0.2.1/28
 48}
 49
 50h1_destroy()
 51{
 52	simple_if_fini $h1 192.0.2.1/28
 53}
 54
 55vrf2_create()
 56{
 57	simple_if_init $rp2 198.51.100.2/28
 58}
 59
 60vrf2_destroy()
 61{
 62	simple_if_fini $rp2 198.51.100.2/28
 63}
 64
 65switch_create()
 66{
 67	__addr_add_del $swp1 add 192.0.2.2/28
 68	tc qdisc add dev $swp1 clsact
 69	ip link set dev $swp1 up
 70
 71	tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit
 72	__addr_add_del g1 add 192.0.2.65/32
 73	ip link set dev g1 up
 74
 75	__addr_add_del $rp1 add 198.51.100.1/28
 76	ip link set dev $rp1 up
 77}
 78
 79switch_destroy()
 80{
 81	ip link set dev $rp1 down
 82	__addr_add_del $rp1 del 198.51.100.1/28
 83
 84	ip link set dev g1 down
 85	__addr_add_del g1 del 192.0.2.65/32
 86	tunnel_destroy g1
 87
 88	ip link set dev $swp1 down
 89	tc qdisc del dev $swp1 clsact
 90	__addr_add_del $swp1 del 192.0.2.2/28
 91}
 92
 93setup_prepare()
 94{
 95	h1=${NETIFS[p1]}
 96	swp1=${NETIFS[p2]}
 97
 98	rp1=${NETIFS[p3]}
 99	rp2=${NETIFS[p4]}
100
101	forwarding_enable
102	vrf_prepare
103	h1_create
104	switch_create
105	vrf2_create
106}
107
108cleanup()
109{
110	pre_cleanup
111
112	vrf2_destroy
113	switch_destroy
114	h1_destroy
115	vrf_cleanup
116	forwarding_restore
117}
118
119ipip_payload_get()
120{
121	local flags=$1; shift
122	local key=$1; shift
123
124	p=$(:
125		)"$flags"$(		      : GRE flags
126	        )"0:00:"$(                    : Reserved + version
127		)"08:00:"$(		      : ETH protocol type
128		)"$key"$( 		      : Key
129		)"4"$(	                      : IP version
130		)"5:"$(                       : IHL
131		)"00:"$(                      : IP TOS
132		)"00:14:"$(                   : IP total length
133		)"00:00:"$(                   : IP identification
134		)"20:00:"$(                   : IP flags + frag off
135		)"30:"$(                      : IP TTL
136		)"01:"$(                      : IP proto
137		)"E7:E6:"$(    	              : IP header csum
138		)"C0:00:01:01:"$(             : IP saddr : 192.0.1.1
139		)"C0:00:02:01:"$(             : IP daddr : 192.0.2.1
140		)
141	echo $p
142}
143
144ecn_payload_get()
145{
146	echo $(ipip_payload_get "0")
147}
148
149ecn_decap_test()
150{
151	local trap_name="decap_error"
152	local desc=$1; shift
153	local ecn_desc=$1; shift
154	local outer_tos=$1; shift
155	local mz_pid
156
157	RET=0
158
159	tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
160		flower src_ip 192.0.1.1 dst_ip 192.0.2.1 action pass
161
162	rp1_mac=$(mac_get $rp1)
163	rp2_mac=$(mac_get $rp2)
164	payload=$(ecn_payload_get)
165
166	ip vrf exec v$rp2 $MZ $rp2 -c 0 -d 1msec -a $rp2_mac -b $rp1_mac \
167		-A 192.0.2.66 -B 192.0.2.65 -t ip \
168			len=48,tos=$outer_tos,proto=47,p=$payload -q &
169
170	mz_pid=$!
171
172	devlink_trap_exception_test $trap_name
173
174	tc_check_packets "dev $swp1 egress" 101 0
175	check_err $? "Packets were not dropped"
176
177	log_test "$desc: Inner ECN is not ECT and outer is $ecn_desc"
178
179	kill_process $mz_pid
180	tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower
181}
182
183no_matching_tunnel_test()
184{
185	local trap_name="decap_error"
186	local desc=$1; shift
187	local sip=$1; shift
188	local mz_pid
189
190	RET=0
191
192	tc filter add dev $swp1 egress protocol ip pref 1 handle 101 \
193		flower src_ip 192.0.1.1 dst_ip 192.0.2.1 action pass
194
195	rp1_mac=$(mac_get $rp1)
196	rp2_mac=$(mac_get $rp2)
197	payload=$(ipip_payload_get "$@")
198
199	ip vrf exec v$rp2 $MZ $rp2 -c 0 -d 1msec -a $rp2_mac -b $rp1_mac \
200		-A $sip -B 192.0.2.65 -t ip len=48,proto=47,p=$payload -q &
201	mz_pid=$!
202
203	devlink_trap_exception_test $trap_name
204
205	tc_check_packets "dev $swp1 egress" 101 0
206	check_err $? "Packets were not dropped"
207
208	log_test "$desc"
209
210	kill_process $mz_pid
211	tc filter del dev $swp1 egress protocol ip pref 1 handle 101 flower
212}
213
214decap_error_test()
215{
216	# Correct source IP - the remote address
217	local sip=192.0.2.66
218
219	ecn_decap_test "Decap error" "ECT(1)" 01
220	ecn_decap_test "Decap error" "ECT(0)" 02
221	ecn_decap_test "Decap error" "CE" 03
222
223	no_matching_tunnel_test "Decap error: Source IP check failed" \
224		192.0.2.68 "0"
225	no_matching_tunnel_test \
226		"Decap error: Key exists but was not expected" $sip "2" \
227		"00:00:00:E9:"
228
229	# Destroy the tunnel and create new one with key
230	__addr_add_del g1 del 192.0.2.65/32
231	tunnel_destroy g1
232
233	tunnel_create g1 gre 192.0.2.65 192.0.2.66 tos inherit key 233
234	__addr_add_del g1 add 192.0.2.65/32
235
236	no_matching_tunnel_test \
237		"Decap error: Key does not exist but was expected" $sip "0"
238	no_matching_tunnel_test \
239		"Decap error: Packet has a wrong key field" $sip "2" \
240		"00:00:00:E8:"
241}
242
243trap cleanup EXIT
244
245setup_prepare
246setup_wait
247tests_run
248
249exit $EXIT_STATUS