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ebabbf58 MD |
1 | /* SPDX-License-Identifier: (GPL-2.0-only OR LGPL-2.1-only) |
2 | * | |
3 | * counter.c | |
4 | * | |
5 | * Copyright (C) 2020 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
6 | */ | |
7 | ||
8 | #define _GNU_SOURCE | |
9 | #include <errno.h> | |
10 | #include "counter.h" | |
11 | #include "counter-internal.h" | |
12 | #include <lttng/bitmap.h> | |
13 | #include <urcu/system.h> | |
14 | #include <urcu/compiler.h> | |
15 | #include <stdbool.h> | |
16 | #include <helper.h> | |
17 | #include <lttng/align.h> | |
18 | #include "smp.h" | |
19 | #include "shm.h" | |
20 | ||
21 | static size_t lttng_counter_get_dimension_nr_elements(struct lib_counter_dimension *dimension) | |
22 | { | |
23 | return dimension->max_nr_elem; | |
24 | } | |
25 | ||
26 | static int lttng_counter_init_stride(const struct lib_counter_config *config, | |
27 | struct lib_counter *counter) | |
28 | { | |
29 | size_t nr_dimensions = counter->nr_dimensions; | |
30 | size_t stride = 1; | |
31 | ssize_t i; | |
32 | ||
33 | for (i = nr_dimensions - 1; i >= 0; i--) { | |
34 | struct lib_counter_dimension *dimension = &counter->dimensions[i]; | |
35 | size_t nr_elem; | |
36 | ||
37 | nr_elem = lttng_counter_get_dimension_nr_elements(dimension); | |
38 | dimension->stride = stride; | |
39 | /* nr_elem should be minimum 1 for each dimension. */ | |
40 | if (!nr_elem) | |
41 | return -EINVAL; | |
42 | stride *= nr_elem; | |
43 | if (stride > SIZE_MAX / nr_elem) | |
44 | return -EINVAL; | |
45 | } | |
46 | return 0; | |
47 | } | |
48 | ||
49 | static int lttng_counter_layout_init(struct lib_counter *counter, int cpu, int shm_fd) | |
50 | { | |
51 | struct lib_counter_layout *layout; | |
52 | size_t counter_size; | |
53 | size_t nr_elem = counter->allocated_elem; | |
54 | size_t shm_length = 0, counters_offset, overflow_offset, underflow_offset; | |
55 | struct lttng_counter_shm_object *shm_object; | |
56 | ||
57 | if (shm_fd < 0) | |
58 | return 0; /* Skip, will be populated later. */ | |
59 | ||
60 | if (cpu == -1) | |
61 | layout = &counter->global_counters; | |
62 | else | |
63 | layout = &counter->percpu_counters[cpu]; | |
64 | switch (counter->config.counter_size) { | |
65 | case COUNTER_SIZE_8_BIT: | |
66 | case COUNTER_SIZE_16_BIT: | |
67 | case COUNTER_SIZE_32_BIT: | |
68 | case COUNTER_SIZE_64_BIT: | |
69 | counter_size = (size_t) counter->config.counter_size; | |
70 | break; | |
71 | default: | |
72 | return -EINVAL; | |
73 | } | |
74 | layout->shm_fd = shm_fd; | |
75 | counters_offset = shm_length; | |
76 | shm_length += counter_size * nr_elem; | |
77 | overflow_offset = shm_length; | |
00adec46 | 78 | shm_length += LTTNG_UST_ALIGN(nr_elem, 8) / 8; |
ebabbf58 | 79 | underflow_offset = shm_length; |
00adec46 | 80 | shm_length += LTTNG_UST_ALIGN(nr_elem, 8) / 8; |
ebabbf58 MD |
81 | layout->shm_len = shm_length; |
82 | if (counter->is_daemon) { | |
83 | /* Allocate and clear shared memory. */ | |
84 | shm_object = lttng_counter_shm_object_table_alloc(counter->object_table, | |
85 | shm_length, LTTNG_COUNTER_SHM_OBJECT_SHM, shm_fd, cpu); | |
86 | if (!shm_object) | |
87 | return -ENOMEM; | |
88 | } else { | |
89 | /* Map pre-existing shared memory. */ | |
90 | shm_object = lttng_counter_shm_object_table_append_shm(counter->object_table, | |
91 | shm_fd, shm_length); | |
92 | if (!shm_object) | |
93 | return -ENOMEM; | |
94 | } | |
95 | layout->counters = shm_object->memory_map + counters_offset; | |
96 | layout->overflow_bitmap = (unsigned long *)(shm_object->memory_map + overflow_offset); | |
97 | layout->underflow_bitmap = (unsigned long *)(shm_object->memory_map + underflow_offset); | |
98 | return 0; | |
99 | } | |
100 | ||
101 | int lttng_counter_set_global_shm(struct lib_counter *counter, int fd) | |
102 | { | |
103 | struct lib_counter_config *config = &counter->config; | |
104 | struct lib_counter_layout *layout; | |
bb84a1ec | 105 | int ret; |
ebabbf58 MD |
106 | |
107 | if (!(config->alloc & COUNTER_ALLOC_GLOBAL)) | |
108 | return -EINVAL; | |
109 | layout = &counter->global_counters; | |
110 | if (layout->shm_fd >= 0) | |
111 | return -EBUSY; | |
bb84a1ec MD |
112 | ret = lttng_counter_layout_init(counter, -1, fd); |
113 | if (!ret) | |
114 | counter->received_shm++; | |
115 | return ret; | |
ebabbf58 MD |
116 | } |
117 | ||
118 | int lttng_counter_set_cpu_shm(struct lib_counter *counter, int cpu, int fd) | |
119 | { | |
120 | struct lib_counter_config *config = &counter->config; | |
121 | struct lib_counter_layout *layout; | |
bb84a1ec | 122 | int ret; |
ebabbf58 MD |
123 | |
124 | if (cpu < 0 || cpu >= lttng_counter_num_possible_cpus()) | |
125 | return -EINVAL; | |
126 | ||
127 | if (!(config->alloc & COUNTER_ALLOC_PER_CPU)) | |
128 | return -EINVAL; | |
129 | layout = &counter->percpu_counters[cpu]; | |
130 | if (layout->shm_fd >= 0) | |
131 | return -EBUSY; | |
bb84a1ec MD |
132 | ret = lttng_counter_layout_init(counter, cpu, fd); |
133 | if (!ret) | |
134 | counter->received_shm++; | |
135 | return ret; | |
ebabbf58 MD |
136 | } |
137 | ||
138 | static | |
139 | int lttng_counter_set_global_sum_step(struct lib_counter *counter, | |
140 | int64_t global_sum_step) | |
141 | { | |
142 | if (global_sum_step < 0) | |
143 | return -EINVAL; | |
144 | ||
145 | switch (counter->config.counter_size) { | |
146 | case COUNTER_SIZE_8_BIT: | |
147 | if (global_sum_step > INT8_MAX) | |
148 | return -EINVAL; | |
149 | counter->global_sum_step.s8 = (int8_t) global_sum_step; | |
150 | break; | |
151 | case COUNTER_SIZE_16_BIT: | |
152 | if (global_sum_step > INT16_MAX) | |
153 | return -EINVAL; | |
154 | counter->global_sum_step.s16 = (int16_t) global_sum_step; | |
155 | break; | |
156 | case COUNTER_SIZE_32_BIT: | |
157 | if (global_sum_step > INT32_MAX) | |
158 | return -EINVAL; | |
159 | counter->global_sum_step.s32 = (int32_t) global_sum_step; | |
160 | break; | |
161 | case COUNTER_SIZE_64_BIT: | |
162 | counter->global_sum_step.s64 = global_sum_step; | |
163 | break; | |
164 | default: | |
165 | return -EINVAL; | |
166 | } | |
167 | ||
168 | return 0; | |
169 | } | |
170 | ||
171 | static | |
172 | int validate_args(const struct lib_counter_config *config, | |
173 | size_t nr_dimensions, | |
174 | const size_t *max_nr_elem, | |
175 | int64_t global_sum_step, | |
176 | int global_counter_fd, | |
177 | int nr_counter_cpu_fds, | |
178 | const int *counter_cpu_fds) | |
179 | { | |
180 | int nr_cpus = lttng_counter_num_possible_cpus(); | |
181 | ||
182 | if (CAA_BITS_PER_LONG != 64 && config->counter_size == COUNTER_SIZE_64_BIT) { | |
183 | WARN_ON_ONCE(1); | |
184 | return -1; | |
185 | } | |
186 | if (!max_nr_elem) | |
187 | return -1; | |
188 | /* | |
189 | * global sum step is only useful with allocating both per-cpu | |
190 | * and global counters. | |
191 | */ | |
192 | if (global_sum_step && (!(config->alloc & COUNTER_ALLOC_GLOBAL) || | |
193 | !(config->alloc & COUNTER_ALLOC_PER_CPU))) | |
194 | return -1; | |
195 | if (!(config->alloc & COUNTER_ALLOC_GLOBAL) && global_counter_fd >= 0) | |
196 | return -1; | |
197 | if (!(config->alloc & COUNTER_ALLOC_PER_CPU) && counter_cpu_fds) | |
198 | return -1; | |
41d6c53d | 199 | if (!(config->alloc & COUNTER_ALLOC_PER_CPU) && nr_counter_cpu_fds >= 0) |
ebabbf58 MD |
200 | return -1; |
201 | if (counter_cpu_fds && nr_cpus != nr_counter_cpu_fds) | |
202 | return -1; | |
203 | return 0; | |
204 | } | |
205 | ||
206 | struct lib_counter *lttng_counter_create(const struct lib_counter_config *config, | |
207 | size_t nr_dimensions, | |
208 | const size_t *max_nr_elem, | |
209 | int64_t global_sum_step, | |
210 | int global_counter_fd, | |
211 | int nr_counter_cpu_fds, | |
212 | const int *counter_cpu_fds, | |
213 | bool is_daemon) | |
214 | { | |
215 | struct lib_counter *counter; | |
216 | size_t dimension, nr_elem = 1; | |
217 | int cpu, ret; | |
218 | int nr_handles = 0; | |
219 | int nr_cpus = lttng_counter_num_possible_cpus(); | |
220 | ||
221 | if (validate_args(config, nr_dimensions, max_nr_elem, | |
222 | global_sum_step, global_counter_fd, nr_counter_cpu_fds, | |
223 | counter_cpu_fds)) | |
224 | return NULL; | |
225 | counter = zmalloc(sizeof(struct lib_counter)); | |
226 | if (!counter) | |
227 | return NULL; | |
228 | counter->global_counters.shm_fd = -1; | |
229 | counter->config = *config; | |
230 | counter->is_daemon = is_daemon; | |
231 | if (lttng_counter_set_global_sum_step(counter, global_sum_step)) | |
232 | goto error_sum_step; | |
233 | counter->nr_dimensions = nr_dimensions; | |
234 | counter->dimensions = zmalloc(nr_dimensions * sizeof(*counter->dimensions)); | |
235 | if (!counter->dimensions) | |
236 | goto error_dimensions; | |
237 | for (dimension = 0; dimension < nr_dimensions; dimension++) | |
238 | counter->dimensions[dimension].max_nr_elem = max_nr_elem[dimension]; | |
239 | if (config->alloc & COUNTER_ALLOC_PER_CPU) { | |
240 | counter->percpu_counters = zmalloc(sizeof(struct lib_counter_layout) * nr_cpus); | |
241 | if (!counter->percpu_counters) | |
242 | goto error_alloc_percpu; | |
243 | lttng_counter_for_each_possible_cpu(cpu) | |
244 | counter->percpu_counters[cpu].shm_fd = -1; | |
245 | } | |
246 | ||
247 | if (lttng_counter_init_stride(config, counter)) | |
248 | goto error_init_stride; | |
249 | //TODO saturation values. | |
250 | for (dimension = 0; dimension < counter->nr_dimensions; dimension++) | |
251 | nr_elem *= lttng_counter_get_dimension_nr_elements(&counter->dimensions[dimension]); | |
252 | counter->allocated_elem = nr_elem; | |
253 | ||
254 | if (config->alloc & COUNTER_ALLOC_GLOBAL) | |
255 | nr_handles++; | |
256 | if (config->alloc & COUNTER_ALLOC_PER_CPU) | |
257 | nr_handles += nr_cpus; | |
bb84a1ec MD |
258 | counter->expected_shm = nr_handles; |
259 | ||
ebabbf58 MD |
260 | /* Allocate table for global and per-cpu counters. */ |
261 | counter->object_table = lttng_counter_shm_object_table_create(nr_handles); | |
262 | if (!counter->object_table) | |
263 | goto error_alloc_object_table; | |
264 | ||
265 | if (config->alloc & COUNTER_ALLOC_GLOBAL) { | |
266 | ret = lttng_counter_layout_init(counter, -1, global_counter_fd); /* global */ | |
267 | if (ret) | |
268 | goto layout_init_error; | |
269 | } | |
270 | if ((config->alloc & COUNTER_ALLOC_PER_CPU) && counter_cpu_fds) { | |
271 | lttng_counter_for_each_possible_cpu(cpu) { | |
272 | ret = lttng_counter_layout_init(counter, cpu, counter_cpu_fds[cpu]); | |
273 | if (ret) | |
274 | goto layout_init_error; | |
275 | } | |
276 | } | |
277 | return counter; | |
278 | ||
279 | layout_init_error: | |
280 | lttng_counter_shm_object_table_destroy(counter->object_table, is_daemon); | |
281 | error_alloc_object_table: | |
282 | error_init_stride: | |
283 | free(counter->percpu_counters); | |
284 | error_alloc_percpu: | |
285 | free(counter->dimensions); | |
286 | error_dimensions: | |
287 | error_sum_step: | |
288 | free(counter); | |
289 | return NULL; | |
290 | } | |
291 | ||
292 | void lttng_counter_destroy(struct lib_counter *counter) | |
293 | { | |
294 | struct lib_counter_config *config = &counter->config; | |
295 | ||
296 | if (config->alloc & COUNTER_ALLOC_PER_CPU) | |
297 | free(counter->percpu_counters); | |
298 | lttng_counter_shm_object_table_destroy(counter->object_table, counter->is_daemon); | |
299 | free(counter->dimensions); | |
300 | free(counter); | |
301 | } | |
302 | ||
303 | int lttng_counter_get_global_shm(struct lib_counter *counter, int *fd, size_t *len) | |
304 | { | |
305 | int shm_fd; | |
306 | ||
307 | shm_fd = counter->global_counters.shm_fd; | |
308 | if (shm_fd < 0) | |
309 | return -1; | |
310 | *fd = shm_fd; | |
311 | *len = counter->global_counters.shm_len; | |
312 | return 0; | |
313 | } | |
314 | ||
315 | int lttng_counter_get_cpu_shm(struct lib_counter *counter, int cpu, int *fd, size_t *len) | |
316 | { | |
317 | struct lib_counter_layout *layout; | |
318 | int shm_fd; | |
319 | ||
320 | if (cpu >= lttng_counter_num_possible_cpus()) | |
321 | return -1; | |
322 | layout = &counter->percpu_counters[cpu]; | |
323 | shm_fd = layout->shm_fd; | |
324 | if (shm_fd < 0) | |
325 | return -1; | |
326 | *fd = shm_fd; | |
327 | *len = layout->shm_len; | |
328 | return 0; | |
329 | } | |
330 | ||
bb84a1ec MD |
331 | bool lttng_counter_ready(struct lib_counter *counter) |
332 | { | |
333 | if (counter->received_shm == counter->expected_shm) | |
334 | return true; | |
335 | return false; | |
336 | } | |
337 | ||
ebabbf58 MD |
338 | int lttng_counter_read(const struct lib_counter_config *config, |
339 | struct lib_counter *counter, | |
340 | const size_t *dimension_indexes, | |
341 | int cpu, int64_t *value, bool *overflow, | |
342 | bool *underflow) | |
343 | { | |
344 | size_t index; | |
345 | struct lib_counter_layout *layout; | |
346 | ||
347 | if (caa_unlikely(lttng_counter_validate_indexes(config, counter, dimension_indexes))) | |
348 | return -EOVERFLOW; | |
349 | index = lttng_counter_get_index(config, counter, dimension_indexes); | |
350 | ||
351 | switch (config->alloc) { | |
352 | case COUNTER_ALLOC_PER_CPU: | |
353 | if (cpu < 0 || cpu >= lttng_counter_num_possible_cpus()) | |
354 | return -EINVAL; | |
355 | layout = &counter->percpu_counters[cpu]; | |
356 | break; | |
357 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
358 | if (cpu >= 0) { | |
359 | if (cpu >= lttng_counter_num_possible_cpus()) | |
360 | return -EINVAL; | |
361 | layout = &counter->percpu_counters[cpu]; | |
362 | } else { | |
363 | layout = &counter->global_counters; | |
364 | } | |
365 | break; | |
366 | case COUNTER_ALLOC_GLOBAL: | |
367 | if (cpu >= 0) | |
368 | return -EINVAL; | |
369 | layout = &counter->global_counters; | |
370 | break; | |
371 | default: | |
372 | return -EINVAL; | |
373 | } | |
374 | if (caa_unlikely(!layout->counters)) | |
375 | return -ENODEV; | |
376 | ||
377 | switch (config->counter_size) { | |
378 | case COUNTER_SIZE_8_BIT: | |
379 | { | |
380 | int8_t *int_p = (int8_t *) layout->counters + index; | |
381 | *value = (int64_t) CMM_LOAD_SHARED(*int_p); | |
382 | break; | |
383 | } | |
384 | case COUNTER_SIZE_16_BIT: | |
385 | { | |
386 | int16_t *int_p = (int16_t *) layout->counters + index; | |
387 | *value = (int64_t) CMM_LOAD_SHARED(*int_p); | |
388 | break; | |
389 | } | |
390 | case COUNTER_SIZE_32_BIT: | |
391 | { | |
392 | int32_t *int_p = (int32_t *) layout->counters + index; | |
393 | *value = (int64_t) CMM_LOAD_SHARED(*int_p); | |
394 | break; | |
395 | } | |
396 | #if CAA_BITS_PER_LONG == 64 | |
397 | case COUNTER_SIZE_64_BIT: | |
398 | { | |
399 | int64_t *int_p = (int64_t *) layout->counters + index; | |
400 | *value = CMM_LOAD_SHARED(*int_p); | |
401 | break; | |
402 | } | |
403 | #endif | |
404 | default: | |
405 | return -EINVAL; | |
406 | } | |
407 | *overflow = lttng_bitmap_test_bit(index, layout->overflow_bitmap); | |
408 | *underflow = lttng_bitmap_test_bit(index, layout->underflow_bitmap); | |
409 | return 0; | |
410 | } | |
411 | ||
412 | int lttng_counter_aggregate(const struct lib_counter_config *config, | |
413 | struct lib_counter *counter, | |
414 | const size_t *dimension_indexes, | |
415 | int64_t *value, bool *overflow, | |
416 | bool *underflow) | |
417 | { | |
418 | int cpu, ret; | |
419 | int64_t v, sum = 0; | |
420 | bool of, uf; | |
421 | ||
422 | *overflow = false; | |
423 | *underflow = false; | |
424 | ||
425 | switch (config->alloc) { | |
426 | case COUNTER_ALLOC_GLOBAL: /* Fallthrough */ | |
427 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
428 | /* Read global counter. */ | |
429 | ret = lttng_counter_read(config, counter, dimension_indexes, | |
430 | -1, &v, &of, &uf); | |
431 | if (ret < 0) | |
432 | return ret; | |
433 | sum += v; | |
434 | *overflow |= of; | |
435 | *underflow |= uf; | |
436 | break; | |
437 | case COUNTER_ALLOC_PER_CPU: | |
438 | break; | |
439 | default: | |
440 | return -EINVAL; | |
441 | } | |
442 | ||
443 | switch (config->alloc) { | |
444 | case COUNTER_ALLOC_GLOBAL: | |
445 | break; | |
446 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: /* Fallthrough */ | |
447 | case COUNTER_ALLOC_PER_CPU: | |
448 | lttng_counter_for_each_possible_cpu(cpu) { | |
449 | int64_t old = sum; | |
450 | ||
451 | ret = lttng_counter_read(config, counter, dimension_indexes, | |
452 | cpu, &v, &of, &uf); | |
453 | if (ret < 0) | |
454 | return ret; | |
455 | *overflow |= of; | |
456 | *underflow |= uf; | |
457 | /* Overflow is defined on unsigned types. */ | |
458 | sum = (int64_t) ((uint64_t) old + (uint64_t) v); | |
459 | if (v > 0 && sum < old) | |
460 | *overflow = true; | |
461 | else if (v < 0 && sum > old) | |
462 | *underflow = true; | |
463 | } | |
464 | break; | |
465 | default: | |
466 | return -EINVAL; | |
467 | } | |
468 | *value = sum; | |
469 | return 0; | |
470 | } | |
471 | ||
472 | static | |
473 | int lttng_counter_clear_cpu(const struct lib_counter_config *config, | |
474 | struct lib_counter *counter, | |
475 | const size_t *dimension_indexes, | |
476 | int cpu) | |
477 | { | |
478 | size_t index; | |
479 | struct lib_counter_layout *layout; | |
480 | ||
481 | if (caa_unlikely(lttng_counter_validate_indexes(config, counter, dimension_indexes))) | |
482 | return -EOVERFLOW; | |
483 | index = lttng_counter_get_index(config, counter, dimension_indexes); | |
484 | ||
485 | switch (config->alloc) { | |
486 | case COUNTER_ALLOC_PER_CPU: | |
487 | if (cpu < 0 || cpu >= lttng_counter_num_possible_cpus()) | |
488 | return -EINVAL; | |
489 | layout = &counter->percpu_counters[cpu]; | |
490 | break; | |
491 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
492 | if (cpu >= 0) { | |
493 | if (cpu >= lttng_counter_num_possible_cpus()) | |
494 | return -EINVAL; | |
495 | layout = &counter->percpu_counters[cpu]; | |
496 | } else { | |
497 | layout = &counter->global_counters; | |
498 | } | |
499 | break; | |
500 | case COUNTER_ALLOC_GLOBAL: | |
501 | if (cpu >= 0) | |
502 | return -EINVAL; | |
503 | layout = &counter->global_counters; | |
504 | break; | |
505 | default: | |
506 | return -EINVAL; | |
507 | } | |
508 | if (caa_unlikely(!layout->counters)) | |
509 | return -ENODEV; | |
510 | ||
511 | switch (config->counter_size) { | |
512 | case COUNTER_SIZE_8_BIT: | |
513 | { | |
514 | int8_t *int_p = (int8_t *) layout->counters + index; | |
515 | CMM_STORE_SHARED(*int_p, 0); | |
516 | break; | |
517 | } | |
518 | case COUNTER_SIZE_16_BIT: | |
519 | { | |
520 | int16_t *int_p = (int16_t *) layout->counters + index; | |
521 | CMM_STORE_SHARED(*int_p, 0); | |
522 | break; | |
523 | } | |
524 | case COUNTER_SIZE_32_BIT: | |
525 | { | |
526 | int32_t *int_p = (int32_t *) layout->counters + index; | |
527 | CMM_STORE_SHARED(*int_p, 0); | |
528 | break; | |
529 | } | |
530 | #if CAA_BITS_PER_LONG == 64 | |
531 | case COUNTER_SIZE_64_BIT: | |
532 | { | |
533 | int64_t *int_p = (int64_t *) layout->counters + index; | |
534 | CMM_STORE_SHARED(*int_p, 0); | |
535 | break; | |
536 | } | |
537 | #endif | |
538 | default: | |
539 | return -EINVAL; | |
540 | } | |
541 | lttng_bitmap_clear_bit(index, layout->overflow_bitmap); | |
542 | lttng_bitmap_clear_bit(index, layout->underflow_bitmap); | |
543 | return 0; | |
544 | } | |
545 | ||
546 | int lttng_counter_clear(const struct lib_counter_config *config, | |
547 | struct lib_counter *counter, | |
548 | const size_t *dimension_indexes) | |
549 | { | |
550 | int cpu, ret; | |
551 | ||
552 | switch (config->alloc) { | |
553 | case COUNTER_ALLOC_PER_CPU: | |
554 | break; | |
555 | case COUNTER_ALLOC_GLOBAL: /* Fallthrough */ | |
556 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
557 | /* Clear global counter. */ | |
558 | ret = lttng_counter_clear_cpu(config, counter, dimension_indexes, -1); | |
559 | if (ret < 0) | |
560 | return ret; | |
561 | break; | |
562 | default: | |
563 | return -EINVAL; | |
564 | } | |
565 | ||
566 | switch (config->alloc) { | |
567 | case COUNTER_ALLOC_PER_CPU: /* Fallthrough */ | |
568 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
569 | lttng_counter_for_each_possible_cpu(cpu) { | |
570 | ret = lttng_counter_clear_cpu(config, counter, dimension_indexes, cpu); | |
571 | if (ret < 0) | |
572 | return ret; | |
573 | } | |
574 | break; | |
575 | case COUNTER_ALLOC_GLOBAL: | |
576 | break; | |
577 | default: | |
578 | return -EINVAL; | |
579 | } | |
580 | return 0; | |
581 | } |