tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#!/bin/bash
2# SPDX-License-Identifier: GPL-2.0
3
4lib_dir=$(dirname $0)/../../../net/forwarding
5
6ALL_TESTS="
7 l3_reporting_test
8 l3_fail_next_test
9 l3_counter_test
10 l3_rollback_test
11 l3_monitor_test
12"
13
14NETDEVSIM_PATH=/sys/bus/netdevsim/
15DEV_ADDR_1=1337
16DEV_ADDR_2=1057
17DEV_ADDR_3=5417
18NUM_NETIFS=0
19source $lib_dir/lib.sh
20
21DUMMY_IFINDEX=
22
23DEV_ADDR()
24{
25 local n=$1; shift
26 local var=DEV_ADDR_$n
27
28 echo ${!var}
29}
30
31DEV()
32{
33 echo netdevsim$(DEV_ADDR $1)
34}
35
36DEVLINK_DEV()
37{
38 echo netdevsim/$(DEV $1)
39}
40
41SYSFS_NET_DIR()
42{
43 echo /sys/bus/netdevsim/devices/$(DEV $1)/net/
44}
45
46DEBUGFS_DIR()
47{
48 echo /sys/kernel/debug/netdevsim/$(DEV $1)/
49}
50
51nsim_add()
52{
53 local n=$1; shift
54
55 echo "$(DEV_ADDR $n) 1" > ${NETDEVSIM_PATH}/new_device
56 while [ ! -d $(SYSFS_NET_DIR $n) ] ; do :; done
57}
58
59nsim_reload()
60{
61 local n=$1; shift
62 local ns=$1; shift
63
64 devlink dev reload $(DEVLINK_DEV $n) netns $ns
65
66 if [ $? -ne 0 ]; then
67 echo "Failed to reload $(DEV $n) into netns \"testns1\""
68 exit 1
69 fi
70
71}
72
73nsim_del()
74{
75 local n=$1; shift
76
77 echo "$(DEV_ADDR $n)" > ${NETDEVSIM_PATH}/del_device
78}
79
80nsim_hwstats_toggle()
81{
82 local action=$1; shift
83 local instance=$1; shift
84 local netdev=$1; shift
85 local type=$1; shift
86
87 local ifindex=$($IP -j link show dev $netdev | jq '.[].ifindex')
88
89 echo $ifindex > $(DEBUGFS_DIR $instance)/hwstats/$type/$action
90}
91
92nsim_hwstats_enable()
93{
94 nsim_hwstats_toggle enable_ifindex "$@"
95}
96
97nsim_hwstats_disable()
98{
99 nsim_hwstats_toggle disable_ifindex "$@"
100}
101
102nsim_hwstats_fail_next_enable()
103{
104 nsim_hwstats_toggle fail_next_enable "$@"
105}
106
107setup_prepare()
108{
109 modprobe netdevsim &> /dev/null
110 nsim_add 1
111 nsim_add 2
112 nsim_add 3
113
114 ip netns add testns1
115
116 if [ $? -ne 0 ]; then
117 echo "Failed to add netns \"testns1\""
118 exit 1
119 fi
120
121 nsim_reload 1 testns1
122 nsim_reload 2 testns1
123 nsim_reload 3 testns1
124
125 IP="ip -n testns1"
126
127 $IP link add name dummy1 type dummy
128 $IP link set dev dummy1 up
129 DUMMY_IFINDEX=$($IP -j link show dev dummy1 | jq '.[].ifindex')
130}
131
132cleanup()
133{
134 pre_cleanup
135
136 $IP link del name dummy1
137 ip netns del testns1
138 nsim_del 3
139 nsim_del 2
140 nsim_del 1
141 modprobe -r netdevsim &> /dev/null
142}
143
144netdev_hwstats_used()
145{
146 local netdev=$1; shift
147 local type=$1; shift
148
149 $IP -j stats show dev "$netdev" group offload subgroup hw_stats_info |
150 jq '.[].info.l3_stats.used'
151}
152
153netdev_check_used()
154{
155 local netdev=$1; shift
156 local type=$1; shift
157
158 [[ $(netdev_hwstats_used $netdev $type) == "true" ]]
159}
160
161netdev_check_unused()
162{
163 local netdev=$1; shift
164 local type=$1; shift
165
166 [[ $(netdev_hwstats_used $netdev $type) == "false" ]]
167}
168
169netdev_hwstats_request()
170{
171 local netdev=$1; shift
172 local type=$1; shift
173
174 $IP -j stats show dev "$netdev" group offload subgroup hw_stats_info |
175 jq ".[].info.${type}_stats.request"
176}
177
178netdev_check_requested()
179{
180 local netdev=$1; shift
181 local type=$1; shift
182
183 [[ $(netdev_hwstats_request $netdev $type) == "true" ]]
184}
185
186netdev_check_unrequested()
187{
188 local netdev=$1; shift
189 local type=$1; shift
190
191 [[ $(netdev_hwstats_request $netdev $type) == "false" ]]
192}
193
194reporting_test()
195{
196 local type=$1; shift
197 local instance=1
198
199 RET=0
200
201 [[ -n $(netdev_hwstats_used dummy1 $type) ]]
202 check_err $? "$type stats not reported"
203
204 netdev_check_unused dummy1 $type
205 check_err $? "$type stats reported as used before either device or netdevsim request"
206
207 nsim_hwstats_enable $instance dummy1 $type
208 netdev_check_unused dummy1 $type
209 check_err $? "$type stats reported as used before device request"
210 netdev_check_unrequested dummy1 $type
211 check_err $? "$type stats reported as requested before device request"
212
213 $IP stats set dev dummy1 ${type}_stats on
214 netdev_check_used dummy1 $type
215 check_err $? "$type stats reported as not used after both device and netdevsim request"
216 netdev_check_requested dummy1 $type
217 check_err $? "$type stats reported as not requested after device request"
218
219 nsim_hwstats_disable $instance dummy1 $type
220 netdev_check_unused dummy1 $type
221 check_err $? "$type stats reported as used after netdevsim request withdrawn"
222
223 nsim_hwstats_enable $instance dummy1 $type
224 netdev_check_used dummy1 $type
225 check_err $? "$type stats reported as not used after netdevsim request reenabled"
226
227 $IP stats set dev dummy1 ${type}_stats off
228 netdev_check_unused dummy1 $type
229 check_err $? "$type stats reported as used after device request withdrawn"
230 netdev_check_unrequested dummy1 $type
231 check_err $? "$type stats reported as requested after device request withdrawn"
232
233 nsim_hwstats_disable $instance dummy1 $type
234 netdev_check_unused dummy1 $type
235 check_err $? "$type stats reported as used after both requests withdrawn"
236
237 log_test "Reporting of $type stats usage"
238}
239
240l3_reporting_test()
241{
242 reporting_test l3
243}
244
245__fail_next_test()
246{
247 local instance=$1; shift
248 local type=$1; shift
249
250 RET=0
251
252 netdev_check_unused dummy1 $type
253 check_err $? "$type stats reported as used before either device or netdevsim request"
254
255 nsim_hwstats_enable $instance dummy1 $type
256 nsim_hwstats_fail_next_enable $instance dummy1 $type
257 netdev_check_unused dummy1 $type
258 check_err $? "$type stats reported as used before device request"
259 netdev_check_unrequested dummy1 $type
260 check_err $? "$type stats reported as requested before device request"
261
262 $IP stats set dev dummy1 ${type}_stats on 2>/dev/null
263 check_fail $? "$type stats request not bounced as it should have been"
264 netdev_check_unused dummy1 $type
265 check_err $? "$type stats reported as used after bounce"
266 netdev_check_unrequested dummy1 $type
267 check_err $? "$type stats reported as requested after bounce"
268
269 $IP stats set dev dummy1 ${type}_stats on
270 check_err $? "$type stats request failed when it shouldn't have"
271 netdev_check_used dummy1 $type
272 check_err $? "$type stats reported as not used after both device and netdevsim request"
273 netdev_check_requested dummy1 $type
274 check_err $? "$type stats reported as not requested after device request"
275
276 $IP stats set dev dummy1 ${type}_stats off
277 nsim_hwstats_disable $instance dummy1 $type
278
279 log_test "Injected failure of $type stats enablement (netdevsim #$instance)"
280}
281
282fail_next_test()
283{
284 __fail_next_test 1 "$@"
285 __fail_next_test 2 "$@"
286 __fail_next_test 3 "$@"
287}
288
289l3_fail_next_test()
290{
291 fail_next_test l3
292}
293
294get_hwstat()
295{
296 local netdev=$1; shift
297 local type=$1; shift
298 local selector=$1; shift
299
300 $IP -j stats show dev $netdev group offload subgroup ${type}_stats |
301 jq ".[0].stats64.${selector}"
302}
303
304counter_test()
305{
306 local type=$1; shift
307 local instance=1
308
309 RET=0
310
311 nsim_hwstats_enable $instance dummy1 $type
312 $IP stats set dev dummy1 ${type}_stats on
313 netdev_check_used dummy1 $type
314 check_err $? "$type stats reported as not used after both device and netdevsim request"
315
316 # Netdevsim counts 10pps on ingress. We should see maybe a couple
317 # packets, unless things take a reeealy long time.
318 local pkts=$(get_hwstat dummy1 l3 rx.packets)
319 ((pkts < 10))
320 check_err $? "$type stats show >= 10 packets after first enablement"
321
322 sleep 2.5
323
324 local pkts=$(get_hwstat dummy1 l3 rx.packets)
325 ((pkts >= 20))
326 check_err $? "$type stats show < 20 packets after 2.5s passed"
327
328 $IP stats set dev dummy1 ${type}_stats off
329
330 sleep 2
331
332 $IP stats set dev dummy1 ${type}_stats on
333 local pkts=$(get_hwstat dummy1 l3 rx.packets)
334 ((pkts < 10))
335 check_err $? "$type stats show >= 10 packets after second enablement"
336
337 $IP stats set dev dummy1 ${type}_stats off
338 nsim_hwstats_fail_next_enable $instance dummy1 $type
339 $IP stats set dev dummy1 ${type}_stats on 2>/dev/null
340 check_fail $? "$type stats request not bounced as it should have been"
341
342 sleep 2
343
344 $IP stats set dev dummy1 ${type}_stats on
345 local pkts=$(get_hwstat dummy1 l3 rx.packets)
346 ((pkts < 10))
347 check_err $? "$type stats show >= 10 packets after post-fail enablement"
348
349 $IP stats set dev dummy1 ${type}_stats off
350
351 log_test "Counter values in $type stats"
352}
353
354l3_counter_test()
355{
356 counter_test l3
357}
358
359rollback_test()
360{
361 local type=$1; shift
362
363 RET=0
364
365 nsim_hwstats_enable 1 dummy1 l3
366 nsim_hwstats_enable 2 dummy1 l3
367 nsim_hwstats_enable 3 dummy1 l3
368
369 # The three netdevsim instances are registered in order of their number
370 # one after another. It is reasonable to expect that whatever
371 # notifications take place hit no. 2 in between hitting nos. 1 and 3,
372 # whatever the actual order. This allows us to test that a fail caused
373 # by no. 2 does not leave the system in a partial state, and rolls
374 # everything back.
375
376 nsim_hwstats_fail_next_enable 2 dummy1 l3
377 $IP stats set dev dummy1 ${type}_stats on 2>/dev/null
378 check_fail $? "$type stats request not bounced as it should have been"
379
380 netdev_check_unused dummy1 $type
381 check_err $? "$type stats reported as used after bounce"
382 netdev_check_unrequested dummy1 $type
383 check_err $? "$type stats reported as requested after bounce"
384
385 sleep 2
386
387 $IP stats set dev dummy1 ${type}_stats on
388 check_err $? "$type stats request not upheld as it should have been"
389
390 local pkts=$(get_hwstat dummy1 l3 rx.packets)
391 ((pkts < 10))
392 check_err $? "$type stats show $pkts packets after post-fail enablement"
393
394 $IP stats set dev dummy1 ${type}_stats off
395
396 nsim_hwstats_disable 3 dummy1 l3
397 nsim_hwstats_disable 2 dummy1 l3
398 nsim_hwstats_disable 1 dummy1 l3
399
400 log_test "Failure in $type stats enablement rolled back"
401}
402
403l3_rollback_test()
404{
405 rollback_test l3
406}
407
408l3_monitor_test()
409{
410 hw_stats_monitor_test dummy1 l3 \
411 "nsim_hwstats_enable 1 dummy1 l3" \
412 "nsim_hwstats_disable 1 dummy1 l3" \
413 "$IP"
414}
415
416trap cleanup EXIT
417
418setup_prepare
419tests_run
420
421exit $EXIT_STATUS