1 #!/bin/bash
2 # SPDX-License-Identifier: GPL-2.0
3
4 ALL_TESTS="
5 test_defaults
6 test_dcb_ets
7 test_mtu
8 test_pfc
9 test_int_buf
10 test_tc_priomap
11 test_tc_mtu
12 test_tc_sizes
13 test_tc_int_buf
14 "
15
16 lib_dir=$(dirname $0)/../../../net/forwarding
17
18 NUM_NETIFS=0
19 source $lib_dir/lib.sh
20 source $lib_dir/devlink_lib.sh
21
22 swp=$NETIF_NO_CABLE
23
24 cleanup()
25 {
26 pre_cleanup
27 }
28
29 get_prio_pg()
30 {
31 # Produces a string of numbers "<B0> <B1> ... <B7> ", where BX is number
32 # of buffer that priority X is mapped to.
33 dcb -j buffer show dev $swp |
34 jq -r '[.prio_buffer | .[] | tostring + " "] | add'
35 }
36
37 get_prio_pfc()
38 {
39 # Produces a string of numbers "<P0> <P1> ... <P7> ", where PX denotes
40 # whether priority X has PFC enabled (the value is 1) or disabled (0).
41 dcb -j pfc show dev $swp |
42 jq -r '[.prio_pfc | .[] | if . then "1 " else "0 " end] | add'
43 }
44
45 get_prio_tc()
46 {
47 # Produces a string of numbers "<T0> <T1> ... <T7> ", where TC is number
48 # of TC that priority X is mapped to.
49 dcb -j ets show dev $swp |
50 jq -r '[.prio_tc | .[] | tostring + " "] | add'
51 }
52
53 get_buf_size()
54 {
55 local idx=$1; shift
56
57 dcb -j buffer show dev $swp | jq ".buffer_size[$idx]"
58 }
59
60 get_tot_size()
61 {
62 dcb -j buffer show dev $swp | jq '.total_size'
63 }
64
65 check_prio_pg()
66 {
67 local expect=$1; shift
68
69 local current=$(get_prio_pg)
70 test "$current" = "$expect"
71 check_err $? "prio2buffer is '$current', expected '$expect'"
72 }
73
74 check_prio_pfc()
75 {
76 local expect=$1; shift
77
78 local current=$(get_prio_pfc)
79 test "$current" = "$expect"
80 check_err $? "prio PFC is '$current', expected '$expect'"
81 }
82
83 check_prio_tc()
84 {
85 local expect=$1; shift
86
87 local current=$(get_prio_tc)
88 test "$current" = "$expect"
89 check_err $? "prio_tc is '$current', expected '$expect'"
90 }
91
92 __check_buf_size()
93 {
94 local idx=$1; shift
95 local expr=$1; shift
96 local what=$1; shift
97
98 local current=$(get_buf_size $idx)
99 ((current $expr))
100 check_err $? "${what}buffer $idx size is '$current', expected '$expr'"
101 echo $current
102 }
103
104 check_buf_size()
105 {
106 __check_buf_size "$@" > /dev/null
107 }
108
109 test_defaults()
110 {
111 RET=0
112
113 check_prio_pg "0 0 0 0 0 0 0 0 "
114 check_prio_tc "0 0 0 0 0 0 0 0 "
115 check_prio_pfc "0 0 0 0 0 0 0 0 "
116
117 log_test "Default headroom configuration"
118 }
119
120 test_dcb_ets()
121 {
122 RET=0
123
124 dcb ets set dev $swp prio-tc 0:0 1:2 2:4 3:6 4:1 5:3 6:5 7:7
125
126 check_prio_pg "0 2 4 6 1 3 5 7 "
127 check_prio_tc "0 2 4 6 1 3 5 7 "
128 check_prio_pfc "0 0 0 0 0 0 0 0 "
129
130 dcb ets set dev $swp prio-tc all:0
131
132 check_prio_pg "0 0 0 0 0 0 0 0 "
133 check_prio_tc "0 0 0 0 0 0 0 0 "
134
135 dcb buffer set dev $swp prio-buffer 0:1 1:3 2:5 3:7 4:0 5:2 6:4 7:6 2>/dev/null
136 check_fail $? "prio2buffer accepted in DCB mode"
137
138 log_test "Configuring headroom through ETS"
139 }
140
141 test_mtu()
142 {
143 local what=$1; shift
144 local buf0size_2
145 local buf0size
146
147 RET=0
148 buf0size=$(__check_buf_size 0 "> 0")
149
150 mtu_set $swp 3000
151 buf0size_2=$(__check_buf_size 0 "> $buf0size" "MTU 3000: ")
152 mtu_restore $swp
153
154 mtu_set $swp 6000
155 check_buf_size 0 "> $buf0size_2" "MTU 6000: "
156 mtu_restore $swp
157
158 check_buf_size 0 "== $buf0size"
159
160 log_test "${what}MTU impacts buffer size"
161 }
162
163 test_tc_mtu()
164 {
165 # In TC mode, MTU still impacts the threshold below which a buffer is
166 # not permitted to go.
167
168 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
169 test_mtu "TC: "
170 tc qdisc delete dev $swp root
171 }
172
173 test_pfc()
174 {
175 RET=0
176
177 dcb ets set dev $swp prio-tc all:0 5:1 6:2 7:3
178
179 local buf0size=$(get_buf_size 0)
180 local buf1size=$(get_buf_size 1)
181 local buf2size=$(get_buf_size 2)
182 local buf3size=$(get_buf_size 3)
183 check_buf_size 0 "> 0"
184 check_buf_size 1 "> 0"
185 check_buf_size 2 "> 0"
186 check_buf_size 3 "> 0"
187 check_buf_size 4 "== 0"
188 check_buf_size 5 "== 0"
189 check_buf_size 6 "== 0"
190 check_buf_size 7 "== 0"
191
192 log_test "Buffer size sans PFC"
193
194 RET=0
195
196 dcb pfc set dev $swp prio-pfc all:off 5:on 6:on 7:on delay 0
197
198 check_prio_pg "0 0 0 0 0 1 2 3 "
199 check_prio_pfc "0 0 0 0 0 1 1 1 "
200 check_buf_size 0 "== $buf0size"
201 check_buf_size 1 "> $buf1size"
202 check_buf_size 2 "> $buf2size"
203 check_buf_size 3 "> $buf3size"
204
205 local buf1size=$(get_buf_size 1)
206 check_buf_size 2 "== $buf1size"
207 check_buf_size 3 "== $buf1size"
208
209 log_test "PFC: Cable length 0"
210
211 RET=0
212
213 dcb pfc set dev $swp delay 1000
214
215 check_buf_size 0 "== $buf0size"
216 check_buf_size 1 "> $buf1size"
217 check_buf_size 2 "> $buf1size"
218 check_buf_size 3 "> $buf1size"
219
220 log_test "PFC: Cable length 1000"
221
222 RET=0
223
224 dcb pfc set dev $swp prio-pfc all:off delay 0
225 dcb ets set dev $swp prio-tc all:0
226
227 check_prio_pg "0 0 0 0 0 0 0 0 "
228 check_prio_tc "0 0 0 0 0 0 0 0 "
229 check_buf_size 0 "> 0"
230 check_buf_size 1 "== 0"
231 check_buf_size 2 "== 0"
232 check_buf_size 3 "== 0"
233 check_buf_size 4 "== 0"
234 check_buf_size 5 "== 0"
235 check_buf_size 6 "== 0"
236 check_buf_size 7 "== 0"
237
238 log_test "PFC: Restore defaults"
239 }
240
241 test_tc_priomap()
242 {
243 RET=0
244
245 dcb ets set dev $swp prio-tc 0:0 1:1 2:2 3:3 4:4 5:5 6:6 7:7
246 check_prio_pg "0 1 2 3 4 5 6 7 "
247
248 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
249 check_prio_pg "0 0 0 0 0 0 0 0 "
250
251 dcb buffer set dev $swp prio-buffer 0:1 1:3 2:5 3:7 4:0 5:2 6:4 7:6
252 check_prio_pg "1 3 5 7 0 2 4 6 "
253
254 tc qdisc delete dev $swp root
255 check_prio_pg "0 1 2 3 4 5 6 7 "
256
257 # Clean up.
258 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
259 dcb buffer set dev $swp prio-buffer all:0
260 tc qdisc delete dev $swp root
261 dcb ets set dev $swp prio-tc all:0
262
263 log_test "TC: priomap"
264 }
265
266 test_tc_sizes()
267 {
268 local cell_size=$(devlink_cell_size_get)
269 local size=$((cell_size * 1000))
270
271 RET=0
272
273 dcb buffer set dev $swp buffer-size all:0 0:$size 2>/dev/null
274 check_fail $? "buffer_size should fail before qdisc is added"
275
276 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
277
278 dcb buffer set dev $swp buffer-size all:0 0:$size
279 check_err $? "buffer_size should pass after qdisc is added"
280 check_buf_size 0 "== $size" "set size: "
281
282 mtu_set $swp 6000
283 check_buf_size 0 "== $size" "set MTU: "
284 mtu_restore $swp
285
286 dcb buffer set dev $swp buffer-size all:0
287
288 # After replacing the qdisc for the same kind, buffer_size still has to
289 # work.
290 tc qdisc replace dev $swp root handle 1: bfifo limit 1M
291
292 dcb buffer set dev $swp buffer-size all:0 0:$size
293 check_buf_size 0 "== $size" "post replace, set size: "
294
295 dcb buffer set dev $swp buffer-size all:0
296
297 # Likewise after replacing for a different kind.
298 tc qdisc replace dev $swp root handle 2: prio bands 8
299
300 dcb buffer set dev $swp buffer-size all:0 0:$size
301 check_buf_size 0 "== $size" "post replace different kind, set size: "
302
303 tc qdisc delete dev $swp root
304
305 dcb buffer set dev $swp buffer-size all:0 0:$size 2>/dev/null
306 check_fail $? "buffer_size should fail after qdisc is deleted"
307
308 log_test "TC: buffer size"
309 }
310
311 test_int_buf()
312 {
313 local what=$1; shift
314
315 RET=0
316
317 local buf0size=$(get_buf_size 0)
318 local tot_size=$(get_tot_size)
319
320 # Size of internal buffer and buffer 9.
321 local dsize=$((tot_size - buf0size))
322
323 tc qdisc add dev $swp clsact
324 tc filter add dev $swp egress matchall skip_sw action mirred egress mirror dev $swp
325
326 local buf0size_2=$(get_buf_size 0)
327 local tot_size_2=$(get_tot_size)
328 local dsize_2=$((tot_size_2 - buf0size_2))
329
330 # Egress SPAN should have added to the "invisible" buffer configuration.
331 ((dsize_2 > dsize))
332 check_err $? "Invisible buffers account for '$dsize_2', expected '> $dsize'"
333
334 mtu_set $swp 3000
335
336 local buf0size_3=$(get_buf_size 0)
337 local tot_size_3=$(get_tot_size)
338 local dsize_3=$((tot_size_3 - buf0size_3))
339
340 # MTU change might change buffer 0, which will show at total, but the
341 # hidden buffers should stay the same size.
342 ((dsize_3 == dsize_2))
343 check_err $? "MTU change: Invisible buffers account for '$dsize_3', expected '== $dsize_2'"
344
345 mtu_restore $swp
346 tc qdisc del dev $swp clsact
347
348 # After SPAN removal, hidden buffers should be back to the original sizes.
349 local buf0size_4=$(get_buf_size 0)
350 local tot_size_4=$(get_tot_size)
351 local dsize_4=$((tot_size_4 - buf0size_4))
352 ((dsize_4 == dsize))
353 check_err $? "SPAN removed: Invisible buffers account for '$dsize_4', expected '== $dsize'"
354
355 log_test "${what}internal buffer size"
356 }
357
358 test_tc_int_buf()
359 {
360 local cell_size=$(devlink_cell_size_get)
361 local size=$((cell_size * 1000))
362
363 tc qdisc replace dev $swp root handle 1: bfifo limit 1.5M
364 test_int_buf "TC: "
365
366 dcb buffer set dev $swp buffer-size all:0 0:$size
367 test_int_buf "TC+buffsize: "
368
369 dcb buffer set dev $swp buffer-size all:0
370 tc qdisc delete dev $swp root
371 }
372
373 bail_on_lldpad "configure DCB" "configure Qdiscs"
374
375 trap cleanup EXIT
376 setup_wait
377 tests_run
378
379 exit $EXIT_STATUS
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