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