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#
4# Test devlink-trap policer functionality over mlxsw.
5
6# +---------------------------------+
7# | H1 (vrf) |
8# | + $h1 |
9# | | 192.0.2.1/24 |
10# | | |
11# | | default via 192.0.2.2 |
12# +----|----------------------------+
13# |
14# +----|----------------------------------------------------------------------+
15# | SW | |
16# | + $rp1 |
17# | 192.0.2.2/24 |
18# | |
19# | 198.51.100.2/24 |
20# | + $rp2 |
21# | | |
22# +----|----------------------------------------------------------------------+
23# |
24# +----|----------------------------+
25# | | default via 198.51.100.2 |
26# | | |
27# | | 198.51.100.1/24 |
28# | + $h2 |
29# | H2 (vrf) |
30# +---------------------------------+
31
32lib_dir=$(dirname $0)/../../../net/forwarding
33
34ALL_TESTS="
35 rate_limits_test
36 burst_limits_test
37 rate_test
38 burst_test
39"
40NUM_NETIFS=4
41source $lib_dir/tc_common.sh
42source $lib_dir/lib.sh
43source $lib_dir/devlink_lib.sh
44
45h1_create()
46{
47 simple_if_init $h1 192.0.2.1/24
48 mtu_set $h1 10000
49
50 ip -4 route add default vrf v$h1 nexthop via 192.0.2.2
51}
52
53h1_destroy()
54{
55 ip -4 route del default vrf v$h1 nexthop via 192.0.2.2
56
57 mtu_restore $h1
58 simple_if_fini $h1 192.0.2.1/24
59}
60
61h2_create()
62{
63 simple_if_init $h2 198.51.100.1/24
64 mtu_set $h2 10000
65
66 ip -4 route add default vrf v$h2 nexthop via 198.51.100.2
67}
68
69h2_destroy()
70{
71 ip -4 route del default vrf v$h2 nexthop via 198.51.100.2
72
73 mtu_restore $h2
74 simple_if_fini $h2 198.51.100.1/24
75}
76
77router_create()
78{
79 ip link set dev $rp1 up
80 ip link set dev $rp2 up
81
82 __addr_add_del $rp1 add 192.0.2.2/24
83 __addr_add_del $rp2 add 198.51.100.2/24
84 mtu_set $rp1 10000
85 mtu_set $rp2 10000
86
87 ip -4 route add blackhole 198.51.100.100
88
89 devlink trap set $DEVLINK_DEV trap blackhole_route action trap
90}
91
92router_destroy()
93{
94 devlink trap set $DEVLINK_DEV trap blackhole_route action drop
95
96 ip -4 route del blackhole 198.51.100.100
97
98 mtu_restore $rp2
99 mtu_restore $rp1
100 __addr_add_del $rp2 del 198.51.100.2/24
101 __addr_add_del $rp1 del 192.0.2.2/24
102
103 ip link set dev $rp2 down
104 ip link set dev $rp1 down
105}
106
107setup_prepare()
108{
109 h1=${NETIFS[p1]}
110 rp1=${NETIFS[p2]}
111
112 rp2=${NETIFS[p3]}
113 h2=${NETIFS[p4]}
114
115 rp1_mac=$(mac_get $rp1)
116
117 vrf_prepare
118
119 h1_create
120 h2_create
121
122 router_create
123}
124
125cleanup()
126{
127 pre_cleanup
128
129 router_destroy
130
131 h2_destroy
132 h1_destroy
133
134 vrf_cleanup
135
136 # Reload to ensure devlink-trap settings are back to default.
137 devlink_reload
138}
139
140rate_limits_test()
141{
142 RET=0
143
144 devlink trap policer set $DEVLINK_DEV policer 1 rate 0 &> /dev/null
145 check_fail $? "Policer rate was changed to rate lower than limit"
146 devlink trap policer set $DEVLINK_DEV policer 1 \
147 rate 2000000001 &> /dev/null
148 check_fail $? "Policer rate was changed to rate higher than limit"
149
150 devlink trap policer set $DEVLINK_DEV policer 1 rate 1
151 check_err $? "Failed to set policer rate to minimum"
152 devlink trap policer set $DEVLINK_DEV policer 1 rate 2000000000
153 check_err $? "Failed to set policer rate to maximum"
154
155 log_test "Trap policer rate limits"
156}
157
158burst_limits_test()
159{
160 RET=0
161
162 devlink trap policer set $DEVLINK_DEV policer 1 burst 0 &> /dev/null
163 check_fail $? "Policer burst size was changed to 0"
164 devlink trap policer set $DEVLINK_DEV policer 1 burst 17 &> /dev/null
165 check_fail $? "Policer burst size was changed to burst size that is not power of 2"
166 devlink trap policer set $DEVLINK_DEV policer 1 burst 8 &> /dev/null
167 check_fail $? "Policer burst size was changed to burst size lower than limit"
168 devlink trap policer set $DEVLINK_DEV policer 1 \
169 burst $((2**25)) &> /dev/null
170 check_fail $? "Policer burst size was changed to burst size higher than limit"
171
172 devlink trap policer set $DEVLINK_DEV policer 1 burst 16
173 check_err $? "Failed to set policer burst size to minimum"
174 devlink trap policer set $DEVLINK_DEV policer 1 burst $((2**24))
175 check_err $? "Failed to set policer burst size to maximum"
176
177 log_test "Trap policer burst size limits"
178}
179
180trap_rate_get()
181{
182 local t0 t1
183
184 t0=$(devlink_trap_rx_packets_get blackhole_route)
185 sleep 10
186 t1=$(devlink_trap_rx_packets_get blackhole_route)
187
188 echo $(((t1 - t0) / 10))
189}
190
191policer_drop_rate_get()
192{
193 local id=$1; shift
194 local t0 t1
195
196 t0=$(devlink_trap_policer_rx_dropped_get $id)
197 sleep 10
198 t1=$(devlink_trap_policer_rx_dropped_get $id)
199
200 echo $(((t1 - t0) / 10))
201}
202
203__rate_test()
204{
205 local rate pct drop_rate
206 local id=$1; shift
207
208 RET=0
209
210 devlink trap policer set $DEVLINK_DEV policer $id rate 1000 burst 512
211 devlink trap group set $DEVLINK_DEV group l3_drops policer $id
212
213 # Send packets at highest possible rate and make sure they are dropped
214 # by the policer. Make sure measured received rate is about 1000 pps
215 log_info "=== Tx rate: Highest, Policer rate: 1000 pps ==="
216
217 start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac
218
219 sleep 5 # Take measurements when rate is stable
220
221 rate=$(trap_rate_get)
222 pct=$((100 * (rate - 1000) / 1000))
223 ((-10 <= pct && pct <= 10))
224 check_err $? "Expected rate 1000 pps, got $rate pps, which is $pct% off. Required accuracy is +-10%"
225 log_info "Expected rate 1000 pps, measured rate $rate pps"
226
227 drop_rate=$(policer_drop_rate_get $id)
228 (( drop_rate > 0 ))
229 check_err $? "Expected non-zero policer drop rate, got 0"
230 log_info "Measured policer drop rate of $drop_rate pps"
231
232 stop_traffic
233
234 # Send packets at a rate of 1000 pps and make sure they are not dropped
235 # by the policer
236 log_info "=== Tx rate: 1000 pps, Policer rate: 1000 pps ==="
237
238 start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -d 1msec
239
240 sleep 5 # Take measurements when rate is stable
241
242 drop_rate=$(policer_drop_rate_get $id)
243 (( drop_rate == 0 ))
244 check_err $? "Expected zero policer drop rate, got a drop rate of $drop_rate pps"
245 log_info "Measured policer drop rate of $drop_rate pps"
246
247 stop_traffic
248
249 # Unbind the policer and send packets at highest possible rate. Make
250 # sure they are not dropped by the policer and that the measured
251 # received rate is higher than 1000 pps
252 log_info "=== Tx rate: Highest, Policer rate: No policer ==="
253
254 devlink trap group set $DEVLINK_DEV group l3_drops nopolicer
255
256 start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac
257
258 rate=$(trap_rate_get)
259 (( rate > 1000 ))
260 check_err $? "Expected rate higher than 1000 pps, got $rate pps"
261 log_info "Measured rate $rate pps"
262
263 drop_rate=$(policer_drop_rate_get $id)
264 (( drop_rate == 0 ))
265 check_err $? "Expected zero policer drop rate, got a drop rate of $drop_rate pps"
266 log_info "Measured policer drop rate of $drop_rate pps"
267
268 stop_traffic
269
270 log_test "Trap policer rate"
271}
272
273rate_test()
274{
275 local last_policer=$(devlink -j -p trap policer show |
276 jq '[.[]["'$DEVLINK_DEV'"][].policer] | max')
277
278 log_info "Running rate test for policer 1"
279 __rate_test 1
280
281 log_info "Running rate test for policer $((last_policer / 2))"
282 __rate_test $((last_policer / 2))
283
284 log_info "Running rate test for policer $last_policer"
285 __rate_test $last_policer
286}
287
288__burst_test()
289{
290 local t0_rx t0_drop t1_rx t1_drop rx drop
291 local id=$1; shift
292
293 RET=0
294
295 devlink trap policer set $DEVLINK_DEV policer $id rate 1000 burst 512
296 devlink trap group set $DEVLINK_DEV group l3_drops policer $id
297
298 # Send a burst of 16 packets and make sure that 16 are received
299 # and that none are dropped by the policer
300 log_info "=== Tx burst size: 16, Policer burst size: 512 ==="
301
302 t0_rx=$(devlink_trap_rx_packets_get blackhole_route)
303 t0_drop=$(devlink_trap_policer_rx_dropped_get $id)
304
305 start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -c 16
306
307 t1_rx=$(devlink_trap_rx_packets_get blackhole_route)
308 t1_drop=$(devlink_trap_policer_rx_dropped_get $id)
309
310 rx=$((t1_rx - t0_rx))
311 (( rx == 16 ))
312 check_err $? "Expected burst size of 16 packets, got $rx packets"
313 log_info "Expected burst size of 16 packets, measured burst size of $rx packets"
314
315 drop=$((t1_drop - t0_drop))
316 (( drop == 0 ))
317 check_err $? "Expected zero policer drops, got $drop"
318 log_info "Measured policer drops of $drop packets"
319
320 # Unbind the policer and send a burst of 64 packets. Make sure that
321 # 64 packets are received and that none are dropped by the policer
322 log_info "=== Tx burst size: 64, Policer burst size: No policer ==="
323
324 devlink trap group set $DEVLINK_DEV group l3_drops nopolicer
325
326 t0_rx=$(devlink_trap_rx_packets_get blackhole_route)
327 t0_drop=$(devlink_trap_policer_rx_dropped_get $id)
328
329 start_traffic $h1 192.0.2.1 198.51.100.100 $rp1_mac -c 64
330
331 t1_rx=$(devlink_trap_rx_packets_get blackhole_route)
332 t1_drop=$(devlink_trap_policer_rx_dropped_get $id)
333
334 rx=$((t1_rx - t0_rx))
335 (( rx == 64 ))
336 check_err $? "Expected burst size of 64 packets, got $rx packets"
337 log_info "Expected burst size of 64 packets, measured burst size of $rx packets"
338
339 drop=$((t1_drop - t0_drop))
340 (( drop == 0 ))
341 check_err $? "Expected zero policer drops, got $drop"
342 log_info "Measured policer drops of $drop packets"
343
344 log_test "Trap policer burst size"
345}
346
347burst_test()
348{
349 local last_policer=$(devlink -j -p trap policer show |
350 jq '[.[]["'$DEVLINK_DEV'"][].policer] | max')
351
352 log_info "Running burst test for policer 1"
353 __burst_test 1
354
355 log_info "Running burst test for policer $((last_policer / 2))"
356 __burst_test $((last_policer / 2))
357
358 log_info "Running burst test for policer $last_policer"
359 __burst_test $last_policer
360}
361
362trap cleanup EXIT
363
364setup_prepare
365setup_wait
366
367tests_run
368
369exit $EXIT_STATUS