1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3 #
4 # Validate cached routes in fib{6}_nh that is used by multiple prefixes.
5 # Validate a different # exception is generated in h0 for each remote host.
6 #
7 # h1
8 # /
9 # h0 - r1 - h2
10 # \
11 # h3
12 #
13 # routing in h0 to hN is done with nexthop objects.
14
15 source lib.sh
16 PAUSE_ON_FAIL=no
17 VERBOSE=0
18
19 which ping6 > /dev/null 2>&1 && ping6=$(which ping6) || ping6=$(which ping)
20
21 ################################################################################
22 # helpers
23
24 log_test()
25 {
26 local rc=$1
27 local expected=$2
28 local msg="$3"
29
30 if [ ${rc} -eq ${expected} ]; then
31 printf "TEST: %-60s [ OK ]\n" "${msg}"
32 nsuccess=$((nsuccess+1))
33 else
34 ret=1
35 nfail=$((nfail+1))
36 printf "TEST: %-60s [FAIL]\n" "${msg}"
37 if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
38 echo
39 echo "hit enter to continue, 'q' to quit"
40 read a
41 [ "$a" = "q" ] && exit 1
42 fi
43 fi
44
45 [ "$VERBOSE" = "1" ] && echo
46 }
47
48 run_cmd()
49 {
50 local cmd="$*"
51 local out
52 local rc
53
54 if [ "$VERBOSE" = "1" ]; then
55 echo "COMMAND: $cmd"
56 fi
57
58 out=$(eval $cmd 2>&1)
59 rc=$?
60 if [ "$VERBOSE" = "1" -a -n "$out" ]; then
61 echo "$out"
62 fi
63
64 [ "$VERBOSE" = "1" ] && echo
65
66 return $rc
67 }
68
69 ################################################################################
70 # config
71
72 create_ns()
73 {
74 local ns=${1}
75
76 ip netns exec ${ns} sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1
77 case ${ns} in
78 h*)
79 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0
80 ;;
81 r*)
82 ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1
83 ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1
84 ;;
85 esac
86 }
87
88 setup()
89 {
90 local ns
91 local i
92
93 #set -e
94
95 setup_ns h0 r1 h1 h2 h3
96 h[0]=$h0
97 h[1]=$h1
98 h[2]=$h2
99 h[3]=$h3
100 r[1]=$r1
101 for ns in ${h[0]} ${r[1]} ${h[1]} ${h[2]} ${h[3]}
102 do
103 create_ns ${ns}
104 done
105
106 #
107 # create interconnects
108 #
109
110 for i in 0 1 2 3
111 do
112 ip -netns ${h[$i]} li add eth0 type veth peer name r1h${i}
113 ip -netns ${h[$i]} li set eth0 up
114 ip -netns ${h[$i]} li set r1h${i} netns ${r[1]} name eth${i} up
115
116 ip -netns ${h[$i]} addr add dev eth0 172.16.10${i}.1/24
117 ip -netns ${h[$i]} -6 addr add dev eth0 2001:db8:10${i}::1/64
118 ip -netns ${r[1]} addr add dev eth${i} 172.16.10${i}.254/24
119 ip -netns ${r[1]} -6 addr add dev eth${i} 2001:db8:10${i}::64/64
120 done
121
122 ip -netns ${h[0]} nexthop add id 4 via 172.16.100.254 dev eth0
123 ip -netns ${h[0]} nexthop add id 6 via 2001:db8:100::64 dev eth0
124
125 # routing from ${h[0]} to h1-h3 and back
126 for i in 1 2 3
127 do
128 ip -netns ${h[0]} ro add 172.16.10${i}.0/24 nhid 4
129 ip -netns ${h[$i]} ro add 172.16.100.0/24 via 172.16.10${i}.254
130
131 ip -netns ${h[0]} -6 ro add 2001:db8:10${i}::/64 nhid 6
132 ip -netns ${h[$i]} -6 ro add 2001:db8:100::/64 via 2001:db8:10${i}::64
133 done
134
135 if [ "$VERBOSE" = "1" ]; then
136 echo
137 echo "host 1 config"
138 ip -netns ${h[0]} li sh
139 ip -netns ${h[0]} ro sh
140 ip -netns ${h[0]} -6 ro sh
141 fi
142
143 #set +e
144 }
145
146 cleanup()
147 {
148 cleanup_all_ns
149 }
150
151 change_mtu()
152 {
153 local hostid=$1
154 local mtu=$2
155
156 run_cmd ip -netns h${hostid} li set eth0 mtu ${mtu}
157 run_cmd ip -netns ${r1} li set eth${hostid} mtu ${mtu}
158 }
159
160 ################################################################################
161 # validate exceptions
162
163 validate_v4_exception()
164 {
165 local i=$1
166 local mtu=$2
167 local ping_sz=$3
168 local dst="172.16.10${i}.1"
169 local h0_ip=172.16.100.1
170 local r1_ip=172.16.100.254
171 local rc
172
173 if [ ${ping_sz} != "0" ]; then
174 run_cmd ip netns exec ${h0} ping -s ${ping_sz} -c5 -w5 ${dst}
175 fi
176
177 if [ "$VERBOSE" = "1" ]; then
178 echo "Route get"
179 ip -netns ${h0} ro get ${dst}
180 echo "Searching for:"
181 echo " cache .* mtu ${mtu}"
182 echo
183 fi
184
185 ip -netns ${h0} ro get ${dst} | \
186 grep -q "cache .* mtu ${mtu}"
187 rc=$?
188
189 log_test $rc 0 "IPv4: host 0 to host ${i}, mtu ${mtu}"
190 }
191
192 validate_v6_exception()
193 {
194 local i=$1
195 local mtu=$2
196 local ping_sz=$3
197 local dst="2001:db8:10${i}::1"
198 local h0_ip=2001:db8:100::1
199 local r1_ip=2001:db8:100::64
200 local rc
201
202 if [ ${ping_sz} != "0" ]; then
203 run_cmd ip netns exec ${h0} ${ping6} -s ${ping_sz} -c5 -w5 ${dst}
204 fi
205
206 if [ "$VERBOSE" = "1" ]; then
207 echo "Route get"
208 ip -netns ${h0} -6 ro get ${dst}
209 echo "Searching for:"
210 echo " ${dst}.* via ${r1_ip} dev eth0 src ${h0_ip} .* mtu ${mtu}"
211 echo
212 fi
213
214 ip -netns ${h0} -6 ro get ${dst} | \
215 grep -q "${dst}.* via ${r1_ip} dev eth0 src ${h0_ip} .* mtu ${mtu}"
216 rc=$?
217
218 log_test $rc 0 "IPv6: host 0 to host ${i}, mtu ${mtu}"
219 }
220
221 ################################################################################
222 # main
223
224 while getopts :pv o
225 do
226 case $o in
227 p) PAUSE_ON_FAIL=yes;;
228 v) VERBOSE=1;;
229 esac
230 done
231
232 cleanup
233 setup
234 sleep 2
235
236 cpus=$(cat /sys/devices/system/cpu/online)
237 cpus="$(seq ${cpus/-/ })"
238 ret=0
239 for i in 1 2 3
240 do
241 # generate a cached route per-cpu
242 for c in ${cpus}; do
243 run_cmd taskset -c ${c} ip netns exec ${h0} ping -c1 -w1 172.16.10${i}.1
244 [ $? -ne 0 ] && printf "\nERROR: ping to ${h[$i]} failed\n" && ret=1
245
246 run_cmd taskset -c ${c} ip netns exec ${h0} ${ping6} -c1 -w1 2001:db8:10${i}::1
247 [ $? -ne 0 ] && printf "\nERROR: ping6 to ${h[$i]} failed\n" && ret=1
248
249 [ $ret -ne 0 ] && break
250 done
251 [ $ret -ne 0 ] && break
252 done
253
254 if [ $ret -eq 0 ]; then
255 # generate different exceptions in h0 for h1, h2 and h3
256 change_mtu 1 1300
257 validate_v4_exception 1 1300 1350
258 validate_v6_exception 1 1300 1350
259 echo
260
261 change_mtu 2 1350
262 validate_v4_exception 2 1350 1400
263 validate_v6_exception 2 1350 1400
264 echo
265
266 change_mtu 3 1400
267 validate_v4_exception 3 1400 1450
268 validate_v6_exception 3 1400 1450
269 echo
270
271 validate_v4_exception 1 1300 0
272 validate_v6_exception 1 1300 0
273 echo
274
275 validate_v4_exception 2 1350 0
276 validate_v6_exception 2 1350 0
277 echo
278
279 validate_v4_exception 3 1400 0
280 validate_v6_exception 3 1400 0
281
282 # targeted deletes to trigger cleanup paths in kernel
283 ip -netns ${h0} ro del 172.16.102.0/24 nhid 4
284 ip -netns ${h0} -6 ro del 2001:db8:102::/64 nhid 6
285
286 ip -netns ${h0} nexthop del id 4
287 ip -netns ${h0} nexthop del id 6
288 fi
289
290 cleanup
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