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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; | |
105 | ||
106 | if (!(config->alloc & COUNTER_ALLOC_GLOBAL)) | |
107 | return -EINVAL; | |
108 | layout = &counter->global_counters; | |
109 | if (layout->shm_fd >= 0) | |
110 | return -EBUSY; | |
111 | return lttng_counter_layout_init(counter, -1, fd); | |
112 | } | |
113 | ||
114 | int lttng_counter_set_cpu_shm(struct lib_counter *counter, int cpu, int fd) | |
115 | { | |
116 | struct lib_counter_config *config = &counter->config; | |
117 | struct lib_counter_layout *layout; | |
118 | ||
119 | if (cpu < 0 || cpu >= lttng_counter_num_possible_cpus()) | |
120 | return -EINVAL; | |
121 | ||
122 | if (!(config->alloc & COUNTER_ALLOC_PER_CPU)) | |
123 | return -EINVAL; | |
124 | layout = &counter->percpu_counters[cpu]; | |
125 | if (layout->shm_fd >= 0) | |
126 | return -EBUSY; | |
127 | return lttng_counter_layout_init(counter, cpu, fd); | |
128 | } | |
129 | ||
130 | static | |
131 | int lttng_counter_set_global_sum_step(struct lib_counter *counter, | |
132 | int64_t global_sum_step) | |
133 | { | |
134 | if (global_sum_step < 0) | |
135 | return -EINVAL; | |
136 | ||
137 | switch (counter->config.counter_size) { | |
138 | case COUNTER_SIZE_8_BIT: | |
139 | if (global_sum_step > INT8_MAX) | |
140 | return -EINVAL; | |
141 | counter->global_sum_step.s8 = (int8_t) global_sum_step; | |
142 | break; | |
143 | case COUNTER_SIZE_16_BIT: | |
144 | if (global_sum_step > INT16_MAX) | |
145 | return -EINVAL; | |
146 | counter->global_sum_step.s16 = (int16_t) global_sum_step; | |
147 | break; | |
148 | case COUNTER_SIZE_32_BIT: | |
149 | if (global_sum_step > INT32_MAX) | |
150 | return -EINVAL; | |
151 | counter->global_sum_step.s32 = (int32_t) global_sum_step; | |
152 | break; | |
153 | case COUNTER_SIZE_64_BIT: | |
154 | counter->global_sum_step.s64 = global_sum_step; | |
155 | break; | |
156 | default: | |
157 | return -EINVAL; | |
158 | } | |
159 | ||
160 | return 0; | |
161 | } | |
162 | ||
163 | static | |
164 | int validate_args(const struct lib_counter_config *config, | |
165 | size_t nr_dimensions, | |
166 | const size_t *max_nr_elem, | |
167 | int64_t global_sum_step, | |
168 | int global_counter_fd, | |
169 | int nr_counter_cpu_fds, | |
170 | const int *counter_cpu_fds) | |
171 | { | |
172 | int nr_cpus = lttng_counter_num_possible_cpus(); | |
173 | ||
174 | if (CAA_BITS_PER_LONG != 64 && config->counter_size == COUNTER_SIZE_64_BIT) { | |
175 | WARN_ON_ONCE(1); | |
176 | return -1; | |
177 | } | |
178 | if (!max_nr_elem) | |
179 | return -1; | |
180 | /* | |
181 | * global sum step is only useful with allocating both per-cpu | |
182 | * and global counters. | |
183 | */ | |
184 | if (global_sum_step && (!(config->alloc & COUNTER_ALLOC_GLOBAL) || | |
185 | !(config->alloc & COUNTER_ALLOC_PER_CPU))) | |
186 | return -1; | |
187 | if (!(config->alloc & COUNTER_ALLOC_GLOBAL) && global_counter_fd >= 0) | |
188 | return -1; | |
189 | if (!(config->alloc & COUNTER_ALLOC_PER_CPU) && counter_cpu_fds) | |
190 | return -1; | |
41d6c53d | 191 | if (!(config->alloc & COUNTER_ALLOC_PER_CPU) && nr_counter_cpu_fds >= 0) |
ebabbf58 MD |
192 | return -1; |
193 | if (counter_cpu_fds && nr_cpus != nr_counter_cpu_fds) | |
194 | return -1; | |
195 | return 0; | |
196 | } | |
197 | ||
198 | struct lib_counter *lttng_counter_create(const struct lib_counter_config *config, | |
199 | size_t nr_dimensions, | |
200 | const size_t *max_nr_elem, | |
201 | int64_t global_sum_step, | |
202 | int global_counter_fd, | |
203 | int nr_counter_cpu_fds, | |
204 | const int *counter_cpu_fds, | |
205 | bool is_daemon) | |
206 | { | |
207 | struct lib_counter *counter; | |
208 | size_t dimension, nr_elem = 1; | |
209 | int cpu, ret; | |
210 | int nr_handles = 0; | |
211 | int nr_cpus = lttng_counter_num_possible_cpus(); | |
212 | ||
213 | if (validate_args(config, nr_dimensions, max_nr_elem, | |
214 | global_sum_step, global_counter_fd, nr_counter_cpu_fds, | |
215 | counter_cpu_fds)) | |
216 | return NULL; | |
217 | counter = zmalloc(sizeof(struct lib_counter)); | |
218 | if (!counter) | |
219 | return NULL; | |
220 | counter->global_counters.shm_fd = -1; | |
221 | counter->config = *config; | |
222 | counter->is_daemon = is_daemon; | |
223 | if (lttng_counter_set_global_sum_step(counter, global_sum_step)) | |
224 | goto error_sum_step; | |
225 | counter->nr_dimensions = nr_dimensions; | |
226 | counter->dimensions = zmalloc(nr_dimensions * sizeof(*counter->dimensions)); | |
227 | if (!counter->dimensions) | |
228 | goto error_dimensions; | |
229 | for (dimension = 0; dimension < nr_dimensions; dimension++) | |
230 | counter->dimensions[dimension].max_nr_elem = max_nr_elem[dimension]; | |
231 | if (config->alloc & COUNTER_ALLOC_PER_CPU) { | |
232 | counter->percpu_counters = zmalloc(sizeof(struct lib_counter_layout) * nr_cpus); | |
233 | if (!counter->percpu_counters) | |
234 | goto error_alloc_percpu; | |
235 | lttng_counter_for_each_possible_cpu(cpu) | |
236 | counter->percpu_counters[cpu].shm_fd = -1; | |
237 | } | |
238 | ||
239 | if (lttng_counter_init_stride(config, counter)) | |
240 | goto error_init_stride; | |
241 | //TODO saturation values. | |
242 | for (dimension = 0; dimension < counter->nr_dimensions; dimension++) | |
243 | nr_elem *= lttng_counter_get_dimension_nr_elements(&counter->dimensions[dimension]); | |
244 | counter->allocated_elem = nr_elem; | |
245 | ||
246 | if (config->alloc & COUNTER_ALLOC_GLOBAL) | |
247 | nr_handles++; | |
248 | if (config->alloc & COUNTER_ALLOC_PER_CPU) | |
249 | nr_handles += nr_cpus; | |
250 | /* Allocate table for global and per-cpu counters. */ | |
251 | counter->object_table = lttng_counter_shm_object_table_create(nr_handles); | |
252 | if (!counter->object_table) | |
253 | goto error_alloc_object_table; | |
254 | ||
255 | if (config->alloc & COUNTER_ALLOC_GLOBAL) { | |
256 | ret = lttng_counter_layout_init(counter, -1, global_counter_fd); /* global */ | |
257 | if (ret) | |
258 | goto layout_init_error; | |
259 | } | |
260 | if ((config->alloc & COUNTER_ALLOC_PER_CPU) && counter_cpu_fds) { | |
261 | lttng_counter_for_each_possible_cpu(cpu) { | |
262 | ret = lttng_counter_layout_init(counter, cpu, counter_cpu_fds[cpu]); | |
263 | if (ret) | |
264 | goto layout_init_error; | |
265 | } | |
266 | } | |
267 | return counter; | |
268 | ||
269 | layout_init_error: | |
270 | lttng_counter_shm_object_table_destroy(counter->object_table, is_daemon); | |
271 | error_alloc_object_table: | |
272 | error_init_stride: | |
273 | free(counter->percpu_counters); | |
274 | error_alloc_percpu: | |
275 | free(counter->dimensions); | |
276 | error_dimensions: | |
277 | error_sum_step: | |
278 | free(counter); | |
279 | return NULL; | |
280 | } | |
281 | ||
282 | void lttng_counter_destroy(struct lib_counter *counter) | |
283 | { | |
284 | struct lib_counter_config *config = &counter->config; | |
285 | ||
286 | if (config->alloc & COUNTER_ALLOC_PER_CPU) | |
287 | free(counter->percpu_counters); | |
288 | lttng_counter_shm_object_table_destroy(counter->object_table, counter->is_daemon); | |
289 | free(counter->dimensions); | |
290 | free(counter); | |
291 | } | |
292 | ||
293 | int lttng_counter_get_global_shm(struct lib_counter *counter, int *fd, size_t *len) | |
294 | { | |
295 | int shm_fd; | |
296 | ||
297 | shm_fd = counter->global_counters.shm_fd; | |
298 | if (shm_fd < 0) | |
299 | return -1; | |
300 | *fd = shm_fd; | |
301 | *len = counter->global_counters.shm_len; | |
302 | return 0; | |
303 | } | |
304 | ||
305 | int lttng_counter_get_cpu_shm(struct lib_counter *counter, int cpu, int *fd, size_t *len) | |
306 | { | |
307 | struct lib_counter_layout *layout; | |
308 | int shm_fd; | |
309 | ||
310 | if (cpu >= lttng_counter_num_possible_cpus()) | |
311 | return -1; | |
312 | layout = &counter->percpu_counters[cpu]; | |
313 | shm_fd = layout->shm_fd; | |
314 | if (shm_fd < 0) | |
315 | return -1; | |
316 | *fd = shm_fd; | |
317 | *len = layout->shm_len; | |
318 | return 0; | |
319 | } | |
320 | ||
321 | int lttng_counter_read(const struct lib_counter_config *config, | |
322 | struct lib_counter *counter, | |
323 | const size_t *dimension_indexes, | |
324 | int cpu, int64_t *value, bool *overflow, | |
325 | bool *underflow) | |
326 | { | |
327 | size_t index; | |
328 | struct lib_counter_layout *layout; | |
329 | ||
330 | if (caa_unlikely(lttng_counter_validate_indexes(config, counter, dimension_indexes))) | |
331 | return -EOVERFLOW; | |
332 | index = lttng_counter_get_index(config, counter, dimension_indexes); | |
333 | ||
334 | switch (config->alloc) { | |
335 | case COUNTER_ALLOC_PER_CPU: | |
336 | if (cpu < 0 || cpu >= lttng_counter_num_possible_cpus()) | |
337 | return -EINVAL; | |
338 | layout = &counter->percpu_counters[cpu]; | |
339 | break; | |
340 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
341 | if (cpu >= 0) { | |
342 | if (cpu >= lttng_counter_num_possible_cpus()) | |
343 | return -EINVAL; | |
344 | layout = &counter->percpu_counters[cpu]; | |
345 | } else { | |
346 | layout = &counter->global_counters; | |
347 | } | |
348 | break; | |
349 | case COUNTER_ALLOC_GLOBAL: | |
350 | if (cpu >= 0) | |
351 | return -EINVAL; | |
352 | layout = &counter->global_counters; | |
353 | break; | |
354 | default: | |
355 | return -EINVAL; | |
356 | } | |
357 | if (caa_unlikely(!layout->counters)) | |
358 | return -ENODEV; | |
359 | ||
360 | switch (config->counter_size) { | |
361 | case COUNTER_SIZE_8_BIT: | |
362 | { | |
363 | int8_t *int_p = (int8_t *) layout->counters + index; | |
364 | *value = (int64_t) CMM_LOAD_SHARED(*int_p); | |
365 | break; | |
366 | } | |
367 | case COUNTER_SIZE_16_BIT: | |
368 | { | |
369 | int16_t *int_p = (int16_t *) layout->counters + index; | |
370 | *value = (int64_t) CMM_LOAD_SHARED(*int_p); | |
371 | break; | |
372 | } | |
373 | case COUNTER_SIZE_32_BIT: | |
374 | { | |
375 | int32_t *int_p = (int32_t *) layout->counters + index; | |
376 | *value = (int64_t) CMM_LOAD_SHARED(*int_p); | |
377 | break; | |
378 | } | |
379 | #if CAA_BITS_PER_LONG == 64 | |
380 | case COUNTER_SIZE_64_BIT: | |
381 | { | |
382 | int64_t *int_p = (int64_t *) layout->counters + index; | |
383 | *value = CMM_LOAD_SHARED(*int_p); | |
384 | break; | |
385 | } | |
386 | #endif | |
387 | default: | |
388 | return -EINVAL; | |
389 | } | |
390 | *overflow = lttng_bitmap_test_bit(index, layout->overflow_bitmap); | |
391 | *underflow = lttng_bitmap_test_bit(index, layout->underflow_bitmap); | |
392 | return 0; | |
393 | } | |
394 | ||
395 | int lttng_counter_aggregate(const struct lib_counter_config *config, | |
396 | struct lib_counter *counter, | |
397 | const size_t *dimension_indexes, | |
398 | int64_t *value, bool *overflow, | |
399 | bool *underflow) | |
400 | { | |
401 | int cpu, ret; | |
402 | int64_t v, sum = 0; | |
403 | bool of, uf; | |
404 | ||
405 | *overflow = false; | |
406 | *underflow = false; | |
407 | ||
408 | switch (config->alloc) { | |
409 | case COUNTER_ALLOC_GLOBAL: /* Fallthrough */ | |
410 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
411 | /* Read global counter. */ | |
412 | ret = lttng_counter_read(config, counter, dimension_indexes, | |
413 | -1, &v, &of, &uf); | |
414 | if (ret < 0) | |
415 | return ret; | |
416 | sum += v; | |
417 | *overflow |= of; | |
418 | *underflow |= uf; | |
419 | break; | |
420 | case COUNTER_ALLOC_PER_CPU: | |
421 | break; | |
422 | default: | |
423 | return -EINVAL; | |
424 | } | |
425 | ||
426 | switch (config->alloc) { | |
427 | case COUNTER_ALLOC_GLOBAL: | |
428 | break; | |
429 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: /* Fallthrough */ | |
430 | case COUNTER_ALLOC_PER_CPU: | |
431 | lttng_counter_for_each_possible_cpu(cpu) { | |
432 | int64_t old = sum; | |
433 | ||
434 | ret = lttng_counter_read(config, counter, dimension_indexes, | |
435 | cpu, &v, &of, &uf); | |
436 | if (ret < 0) | |
437 | return ret; | |
438 | *overflow |= of; | |
439 | *underflow |= uf; | |
440 | /* Overflow is defined on unsigned types. */ | |
441 | sum = (int64_t) ((uint64_t) old + (uint64_t) v); | |
442 | if (v > 0 && sum < old) | |
443 | *overflow = true; | |
444 | else if (v < 0 && sum > old) | |
445 | *underflow = true; | |
446 | } | |
447 | break; | |
448 | default: | |
449 | return -EINVAL; | |
450 | } | |
451 | *value = sum; | |
452 | return 0; | |
453 | } | |
454 | ||
455 | static | |
456 | int lttng_counter_clear_cpu(const struct lib_counter_config *config, | |
457 | struct lib_counter *counter, | |
458 | const size_t *dimension_indexes, | |
459 | int cpu) | |
460 | { | |
461 | size_t index; | |
462 | struct lib_counter_layout *layout; | |
463 | ||
464 | if (caa_unlikely(lttng_counter_validate_indexes(config, counter, dimension_indexes))) | |
465 | return -EOVERFLOW; | |
466 | index = lttng_counter_get_index(config, counter, dimension_indexes); | |
467 | ||
468 | switch (config->alloc) { | |
469 | case COUNTER_ALLOC_PER_CPU: | |
470 | if (cpu < 0 || cpu >= lttng_counter_num_possible_cpus()) | |
471 | return -EINVAL; | |
472 | layout = &counter->percpu_counters[cpu]; | |
473 | break; | |
474 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
475 | if (cpu >= 0) { | |
476 | if (cpu >= lttng_counter_num_possible_cpus()) | |
477 | return -EINVAL; | |
478 | layout = &counter->percpu_counters[cpu]; | |
479 | } else { | |
480 | layout = &counter->global_counters; | |
481 | } | |
482 | break; | |
483 | case COUNTER_ALLOC_GLOBAL: | |
484 | if (cpu >= 0) | |
485 | return -EINVAL; | |
486 | layout = &counter->global_counters; | |
487 | break; | |
488 | default: | |
489 | return -EINVAL; | |
490 | } | |
491 | if (caa_unlikely(!layout->counters)) | |
492 | return -ENODEV; | |
493 | ||
494 | switch (config->counter_size) { | |
495 | case COUNTER_SIZE_8_BIT: | |
496 | { | |
497 | int8_t *int_p = (int8_t *) layout->counters + index; | |
498 | CMM_STORE_SHARED(*int_p, 0); | |
499 | break; | |
500 | } | |
501 | case COUNTER_SIZE_16_BIT: | |
502 | { | |
503 | int16_t *int_p = (int16_t *) layout->counters + index; | |
504 | CMM_STORE_SHARED(*int_p, 0); | |
505 | break; | |
506 | } | |
507 | case COUNTER_SIZE_32_BIT: | |
508 | { | |
509 | int32_t *int_p = (int32_t *) layout->counters + index; | |
510 | CMM_STORE_SHARED(*int_p, 0); | |
511 | break; | |
512 | } | |
513 | #if CAA_BITS_PER_LONG == 64 | |
514 | case COUNTER_SIZE_64_BIT: | |
515 | { | |
516 | int64_t *int_p = (int64_t *) layout->counters + index; | |
517 | CMM_STORE_SHARED(*int_p, 0); | |
518 | break; | |
519 | } | |
520 | #endif | |
521 | default: | |
522 | return -EINVAL; | |
523 | } | |
524 | lttng_bitmap_clear_bit(index, layout->overflow_bitmap); | |
525 | lttng_bitmap_clear_bit(index, layout->underflow_bitmap); | |
526 | return 0; | |
527 | } | |
528 | ||
529 | int lttng_counter_clear(const struct lib_counter_config *config, | |
530 | struct lib_counter *counter, | |
531 | const size_t *dimension_indexes) | |
532 | { | |
533 | int cpu, ret; | |
534 | ||
535 | switch (config->alloc) { | |
536 | case COUNTER_ALLOC_PER_CPU: | |
537 | break; | |
538 | case COUNTER_ALLOC_GLOBAL: /* Fallthrough */ | |
539 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
540 | /* Clear global counter. */ | |
541 | ret = lttng_counter_clear_cpu(config, counter, dimension_indexes, -1); | |
542 | if (ret < 0) | |
543 | return ret; | |
544 | break; | |
545 | default: | |
546 | return -EINVAL; | |
547 | } | |
548 | ||
549 | switch (config->alloc) { | |
550 | case COUNTER_ALLOC_PER_CPU: /* Fallthrough */ | |
551 | case COUNTER_ALLOC_PER_CPU | COUNTER_ALLOC_GLOBAL: | |
552 | lttng_counter_for_each_possible_cpu(cpu) { | |
553 | ret = lttng_counter_clear_cpu(config, counter, dimension_indexes, cpu); | |
554 | if (ret < 0) | |
555 | return ret; | |
556 | } | |
557 | break; | |
558 | case COUNTER_ALLOC_GLOBAL: | |
559 | break; | |
560 | default: | |
561 | return -EINVAL; | |
562 | } | |
563 | return 0; | |
564 | } |