tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
selftests: Add test with multiple prefixes using single nexthop
Add tests where multiple FIB entries use the same nexthop object. Generate
per-cpu cached routes for each by running ping on each cpu, and then
generate exceptions unique to each prefix (remote host) with different
mtus.
Signed-off-by: David Ahern <dsahern@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
authored by
David Ahern
and committed by
David S. Miller
735ab2f6
622946d9
+290
+290
tools/testing/selftests/net/fib_nexthop_multiprefix.sh
+290
tools/testing/selftests/net/fib_nexthop_multiprefix.sh
···
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
+
PAUSE_ON_FAIL=no
16
+
VERBOSE=0
17
+
18
+
################################################################################
19
+
# helpers
20
+
21
+
log_test()
22
+
{
23
+
local rc=$1
24
+
local expected=$2
25
+
local msg="$3"
26
+
27
+
if [ ${rc} -eq ${expected} ]; then
28
+
printf "TEST: %-60s [ OK ]\n" "${msg}"
29
+
nsuccess=$((nsuccess+1))
30
+
else
31
+
ret=1
32
+
nfail=$((nfail+1))
33
+
printf "TEST: %-60s [FAIL]\n" "${msg}"
34
+
if [ "${PAUSE_ON_FAIL}" = "yes" ]; then
35
+
echo
36
+
echo "hit enter to continue, 'q' to quit"
37
+
read a
38
+
[ "$a" = "q" ] && exit 1
39
+
fi
40
+
fi
41
+
42
+
[ "$VERBOSE" = "1" ] && echo
43
+
}
44
+
45
+
run_cmd()
46
+
{
47
+
local cmd="$*"
48
+
local out
49
+
local rc
50
+
51
+
if [ "$VERBOSE" = "1" ]; then
52
+
echo "COMMAND: $cmd"
53
+
fi
54
+
55
+
out=$(eval $cmd 2>&1)
56
+
rc=$?
57
+
if [ "$VERBOSE" = "1" -a -n "$out" ]; then
58
+
echo "$out"
59
+
fi
60
+
61
+
[ "$VERBOSE" = "1" ] && echo
62
+
63
+
return $rc
64
+
}
65
+
66
+
################################################################################
67
+
# config
68
+
69
+
create_ns()
70
+
{
71
+
local ns=${1}
72
+
73
+
ip netns del ${ns} 2>/dev/null
74
+
75
+
ip netns add ${ns}
76
+
ip -netns ${ns} addr add 127.0.0.1/8 dev lo
77
+
ip -netns ${ns} link set lo up
78
+
79
+
ip netns exec ${ns} sysctl -q -w net.ipv6.conf.all.keep_addr_on_down=1
80
+
case ${ns} in
81
+
h*)
82
+
ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=0
83
+
;;
84
+
r*)
85
+
ip netns exec $ns sysctl -q -w net.ipv4.ip_forward=1
86
+
ip netns exec $ns sysctl -q -w net.ipv6.conf.all.forwarding=1
87
+
;;
88
+
esac
89
+
}
90
+
91
+
setup()
92
+
{
93
+
local ns
94
+
local i
95
+
96
+
#set -e
97
+
98
+
for ns in h0 r1 h1 h2 h3
99
+
do
100
+
create_ns ${ns}
101
+
done
102
+
103
+
#
104
+
# create interconnects
105
+
#
106
+
107
+
for i in 0 1 2 3
108
+
do
109
+
ip -netns h${i} li add eth0 type veth peer name r1h${i}
110
+
ip -netns h${i} li set eth0 up
111
+
ip -netns h${i} li set r1h${i} netns r1 name eth${i} up
112
+
113
+
ip -netns h${i} addr add dev eth0 172.16.10${i}.1/24
114
+
ip -netns h${i} -6 addr add dev eth0 2001:db8:10${i}::1/64
115
+
ip -netns r1 addr add dev eth${i} 172.16.10${i}.254/24
116
+
ip -netns r1 -6 addr add dev eth${i} 2001:db8:10${i}::64/64
117
+
done
118
+
119
+
ip -netns h0 nexthop add id 4 via 172.16.100.254 dev eth0
120
+
ip -netns h0 nexthop add id 6 via 2001:db8:100::64 dev eth0
121
+
122
+
# routing from h0 to h1-h3 and back
123
+
for i in 1 2 3
124
+
do
125
+
ip -netns h0 ro add 172.16.10${i}.0/24 nhid 4
126
+
ip -netns h${i} ro add 172.16.100.0/24 via 172.16.10${i}.254
127
+
128
+
ip -netns h0 -6 ro add 2001:db8:10${i}::/64 nhid 6
129
+
ip -netns h${i} -6 ro add 2001:db8:100::/64 via 2001:db8:10${i}::64
130
+
done
131
+
132
+
if [ "$VERBOSE" = "1" ]; then
133
+
echo
134
+
echo "host 1 config"
135
+
ip -netns h0 li sh
136
+
ip -netns h0 ro sh
137
+
ip -netns h0 -6 ro sh
138
+
fi
139
+
140
+
#set +e
141
+
}
142
+
143
+
cleanup()
144
+
{
145
+
for n in h1 r1 h2 h3 h4
146
+
do
147
+
ip netns del ${n} 2>/dev/null
148
+
done
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=172.16.100.1
170
+
local r1=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=2001:db8:100::1
199
+
local r1=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} from :: via ${r1} dev eth0 src ${h0} .* mtu ${mtu}"
211
+
echo
212
+
fi
213
+
214
+
ip -netns h0 -6 ro get ${dst} | \
215
+
grep -q "${dst} from :: via ${r1} dev eth0 src ${h0} .* 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