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6d420eff JR |
1 | /* |
2 | * Copyright (C) 2019 Jonathan Rajotte <jonathan.rajotte-julien@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: LGPL-2.1-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <assert.h> | |
58daac01 | 9 | #include <common/credentials.h> |
6d420eff JR |
10 | #include <common/error.h> |
11 | #include <common/macros.h> | |
12 | #include <common/payload.h> | |
13 | #include <common/payload-view.h> | |
14 | #include <common/runas.h> | |
15 | #include <lttng/event-rule/event-rule-internal.h> | |
16 | #include <lttng/event-rule/tracepoint-internal.h> | |
17 | ||
18 | #define IS_TRACEPOINT_EVENT_RULE(rule) \ | |
19 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_TRACEPOINT) | |
20 | ||
21 | static void lttng_event_rule_tracepoint_destroy(struct lttng_event_rule *rule) | |
22 | { | |
23 | struct lttng_event_rule_tracepoint *tracepoint; | |
24 | ||
25 | if (rule == NULL) { | |
26 | return; | |
27 | } | |
28 | ||
29 | tracepoint = container_of( | |
30 | rule, struct lttng_event_rule_tracepoint, parent); | |
31 | ||
32 | lttng_dynamic_pointer_array_reset(&tracepoint->exclusions); | |
33 | free(tracepoint->pattern); | |
34 | free(tracepoint->filter_expression); | |
35 | free(tracepoint->internal_filter.filter); | |
36 | free(tracepoint->internal_filter.bytecode); | |
37 | free(tracepoint); | |
38 | } | |
39 | ||
40 | static bool lttng_event_rule_tracepoint_validate( | |
41 | const struct lttng_event_rule *rule) | |
42 | { | |
43 | bool valid = false; | |
44 | struct lttng_event_rule_tracepoint *tracepoint; | |
45 | ||
46 | if (!rule) { | |
47 | goto end; | |
48 | } | |
49 | ||
50 | tracepoint = container_of( | |
51 | rule, struct lttng_event_rule_tracepoint, parent); | |
52 | ||
53 | /* Required field. */ | |
54 | if (!tracepoint->pattern) { | |
55 | ERR("Invalid tracepoint event rule: a pattern must be set."); | |
56 | goto end; | |
57 | } | |
58 | ||
59 | /* Required field. */ | |
60 | if (tracepoint->domain == LTTNG_DOMAIN_NONE) { | |
61 | ERR("Invalid tracepoint event rule: a domain must be set."); | |
62 | goto end; | |
63 | } | |
64 | ||
65 | valid = true; | |
66 | end: | |
67 | return valid; | |
68 | } | |
69 | ||
70 | static int lttng_event_rule_tracepoint_serialize( | |
71 | const struct lttng_event_rule *rule, | |
72 | struct lttng_payload *payload) | |
73 | { | |
74 | int ret, i; | |
75 | size_t pattern_len, filter_expression_len, exclusions_len; | |
76 | struct lttng_event_rule_tracepoint *tracepoint; | |
77 | struct lttng_event_rule_tracepoint_comm tracepoint_comm; | |
78 | enum lttng_event_rule_status status; | |
79 | unsigned int exclusion_count; | |
80 | size_t exclusions_appended_len = 0; | |
81 | ||
82 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
83 | ret = -1; | |
84 | goto end; | |
85 | } | |
86 | ||
87 | DBG("Serializing tracepoint event rule."); | |
88 | tracepoint = container_of( | |
89 | rule, struct lttng_event_rule_tracepoint, parent); | |
90 | ||
91 | status = lttng_event_rule_tracepoint_get_exclusions_count(rule, &exclusion_count); | |
92 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
93 | ||
94 | pattern_len = strlen(tracepoint->pattern) + 1; | |
95 | ||
96 | if (tracepoint->filter_expression != NULL) { | |
97 | filter_expression_len = | |
98 | strlen(tracepoint->filter_expression) + 1; | |
99 | } else { | |
100 | filter_expression_len = 0; | |
101 | } | |
102 | ||
103 | exclusions_len = 0; | |
104 | for (i = 0; i < exclusion_count; i++) { | |
105 | const char *exclusion; | |
106 | ||
107 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
108 | rule, i, &exclusion); | |
109 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
110 | ||
111 | /* Length field. */ | |
112 | exclusions_len += sizeof(uint32_t); | |
113 | /* Payload (null terminated). */ | |
114 | exclusions_len += strlen(exclusion) + 1; | |
115 | } | |
116 | ||
117 | tracepoint_comm.domain_type = (int8_t) tracepoint->domain; | |
118 | tracepoint_comm.loglevel_type = (int8_t) tracepoint->loglevel.type; | |
119 | tracepoint_comm.loglevel_value = tracepoint->loglevel.value; | |
120 | tracepoint_comm.pattern_len = pattern_len; | |
121 | tracepoint_comm.filter_expression_len = filter_expression_len; | |
122 | tracepoint_comm.exclusions_count = exclusion_count; | |
123 | tracepoint_comm.exclusions_len = exclusions_len; | |
124 | ||
125 | ret = lttng_dynamic_buffer_append(&payload->buffer, &tracepoint_comm, | |
126 | sizeof(tracepoint_comm)); | |
127 | if (ret) { | |
128 | goto end; | |
129 | } | |
130 | ||
131 | ret = lttng_dynamic_buffer_append( | |
132 | &payload->buffer, tracepoint->pattern, pattern_len); | |
133 | if (ret) { | |
134 | goto end; | |
135 | } | |
136 | ||
137 | ret = lttng_dynamic_buffer_append(&payload->buffer, tracepoint->filter_expression, | |
138 | filter_expression_len); | |
139 | if (ret) { | |
140 | goto end; | |
141 | } | |
142 | ||
143 | for (i = 0; i < exclusion_count; i++) { | |
144 | size_t len; | |
145 | const char *exclusion; | |
146 | ||
147 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
148 | rule, i, &exclusion); | |
149 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
150 | ||
151 | len = strlen(exclusion) + 1; | |
152 | /* Append exclusion length, includes the null terminator. */ | |
153 | ret = lttng_dynamic_buffer_append( | |
154 | &payload->buffer, &len, sizeof(uint32_t)); | |
155 | if (ret) { | |
156 | goto end; | |
157 | } | |
158 | ||
159 | exclusions_appended_len += sizeof(uint32_t); | |
160 | ||
161 | /* Include the '\0' in the payload. */ | |
162 | ret = lttng_dynamic_buffer_append( | |
163 | &payload->buffer, exclusion, len); | |
164 | if (ret) { | |
165 | goto end; | |
166 | } | |
167 | ||
168 | exclusions_appended_len += len; | |
169 | } | |
170 | ||
171 | assert(exclusions_len == exclusions_appended_len); | |
172 | ||
173 | end: | |
174 | return ret; | |
175 | } | |
176 | ||
177 | static bool lttng_event_rule_tracepoint_is_equal( | |
178 | const struct lttng_event_rule *_a, | |
179 | const struct lttng_event_rule *_b) | |
180 | { | |
181 | int i; | |
182 | bool is_equal = false; | |
183 | struct lttng_event_rule_tracepoint *a, *b; | |
184 | unsigned int count_a, count_b; | |
185 | enum lttng_event_rule_status status; | |
186 | ||
187 | a = container_of(_a, struct lttng_event_rule_tracepoint, parent); | |
188 | b = container_of(_b, struct lttng_event_rule_tracepoint, parent); | |
189 | ||
190 | status = lttng_event_rule_tracepoint_get_exclusions_count(_a, &count_a); | |
191 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
192 | status = lttng_event_rule_tracepoint_get_exclusions_count(_b, &count_b); | |
193 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
194 | ||
195 | /* Quick checks. */ | |
196 | if (a->domain != b->domain) { | |
197 | goto end; | |
198 | } | |
199 | ||
200 | if (count_a != count_b) { | |
201 | goto end; | |
202 | } | |
203 | ||
204 | if (!!a->filter_expression != !!b->filter_expression) { | |
205 | goto end; | |
206 | } | |
207 | ||
208 | /* Long check. */ | |
209 | assert(a->pattern); | |
210 | assert(b->pattern); | |
211 | if (strcmp(a->pattern, b->pattern)) { | |
212 | goto end; | |
213 | } | |
214 | ||
215 | if (a->filter_expression && b->filter_expression) { | |
216 | if (strcmp(a->filter_expression, b->filter_expression)) { | |
217 | goto end; | |
218 | } | |
219 | } else if (!!a->filter_expression != !!b->filter_expression) { | |
220 | /* One is set; not the other. */ | |
221 | goto end; | |
222 | } | |
223 | ||
224 | if (a->loglevel.type != b->loglevel.type) { | |
225 | goto end; | |
226 | } | |
227 | ||
228 | if (a->loglevel.value != b->loglevel.value) { | |
229 | goto end; | |
230 | } | |
231 | ||
232 | for (i = 0; i < count_a; i++) { | |
233 | const char *exclusion_a, *exclusion_b; | |
234 | ||
235 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
236 | _a, i, &exclusion_a); | |
237 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
238 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
239 | _b, i, &exclusion_b); | |
240 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
241 | if (strcmp(exclusion_a, exclusion_b)) { | |
242 | goto end; | |
243 | } | |
244 | } | |
245 | ||
246 | is_equal = true; | |
247 | end: | |
248 | return is_equal; | |
249 | } | |
250 | ||
251 | /* | |
252 | * On success ret is 0; | |
253 | * | |
254 | * On error ret is negative. | |
255 | * | |
256 | * An event with NO loglevel and the name is * will return NULL. | |
257 | */ | |
258 | static int generate_agent_filter( | |
259 | const struct lttng_event_rule *rule, char **_agent_filter) | |
260 | { | |
261 | int err; | |
262 | int ret = 0; | |
263 | char *agent_filter = NULL; | |
264 | const char *pattern; | |
265 | const char *filter; | |
266 | enum lttng_loglevel_type loglevel_type; | |
267 | enum lttng_event_rule_status status; | |
268 | ||
269 | assert(rule); | |
270 | assert(_agent_filter); | |
271 | ||
272 | status = lttng_event_rule_tracepoint_get_pattern(rule, &pattern); | |
273 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
274 | ret = -1; | |
275 | goto end; | |
276 | } | |
277 | ||
278 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); | |
279 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
280 | filter = NULL; | |
281 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
282 | ret = -1; | |
283 | goto end; | |
284 | } | |
285 | ||
286 | status = lttng_event_rule_tracepoint_get_log_level_type( | |
287 | rule, &loglevel_type); | |
288 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
289 | ret = -1; | |
290 | goto end; | |
291 | } | |
292 | ||
293 | /* Don't add filter for the '*' event. */ | |
294 | if (strcmp(pattern, "*") != 0) { | |
295 | if (filter) { | |
296 | err = asprintf(&agent_filter, | |
297 | "(%s) && (logger_name == \"%s\")", | |
298 | filter, pattern); | |
299 | } else { | |
300 | err = asprintf(&agent_filter, "logger_name == \"%s\"", | |
301 | pattern); | |
302 | } | |
303 | ||
304 | if (err < 0) { | |
305 | PERROR("Failed to format agent filter string"); | |
306 | ret = -1; | |
307 | goto end; | |
308 | } | |
309 | } | |
310 | ||
311 | if (loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
312 | const char *op; | |
313 | int loglevel_value; | |
314 | ||
315 | status = lttng_event_rule_tracepoint_get_log_level( | |
316 | rule, &loglevel_value); | |
317 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
318 | ret = -1; | |
319 | goto end; | |
320 | } | |
321 | ||
322 | if (loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
323 | op = ">="; | |
324 | } else { | |
325 | op = "=="; | |
326 | } | |
327 | ||
328 | if (filter || agent_filter) { | |
329 | char *new_filter; | |
330 | ||
331 | err = asprintf(&new_filter, | |
332 | "(%s) && (int_loglevel %s %d)", | |
333 | agent_filter ? agent_filter : filter, | |
334 | op, loglevel_value); | |
335 | if (agent_filter) { | |
336 | free(agent_filter); | |
337 | } | |
338 | agent_filter = new_filter; | |
339 | } else { | |
340 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, | |
341 | loglevel_value); | |
342 | } | |
343 | ||
344 | if (err < 0) { | |
345 | PERROR("Failed to format agent filter string"); | |
346 | ret = -1; | |
347 | goto end; | |
348 | } | |
349 | } | |
350 | ||
351 | *_agent_filter = agent_filter; | |
352 | agent_filter = NULL; | |
353 | ||
354 | end: | |
355 | free(agent_filter); | |
356 | return ret; | |
357 | } | |
358 | ||
359 | static enum lttng_error_code | |
360 | lttng_event_rule_tracepoint_generate_filter_bytecode( | |
58daac01 JR |
361 | struct lttng_event_rule *rule, |
362 | const struct lttng_credentials *creds) | |
6d420eff JR |
363 | { |
364 | int ret; | |
365 | enum lttng_error_code ret_code; | |
366 | struct lttng_event_rule_tracepoint *tracepoint; | |
367 | enum lttng_domain_type domain_type; | |
368 | enum lttng_event_rule_status status; | |
369 | const char *filter; | |
370 | struct lttng_filter_bytecode *bytecode = NULL; | |
371 | ||
372 | assert(rule); | |
373 | ||
374 | tracepoint = container_of( | |
375 | rule, struct lttng_event_rule_tracepoint, parent); | |
376 | ||
377 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); | |
378 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
379 | filter = NULL; | |
380 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
381 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
382 | goto end; | |
383 | } | |
384 | ||
385 | if (filter && filter[0] == '\0') { | |
386 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
387 | goto error; | |
388 | } | |
389 | ||
390 | status = lttng_event_rule_tracepoint_get_domain_type( | |
391 | rule, &domain_type); | |
392 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
393 | ret_code = LTTNG_ERR_UNK; | |
394 | goto error; | |
395 | } | |
396 | ||
397 | switch (domain_type) { | |
398 | case LTTNG_DOMAIN_LOG4J: | |
399 | case LTTNG_DOMAIN_JUL: | |
400 | case LTTNG_DOMAIN_PYTHON: | |
401 | { | |
402 | char *agent_filter; | |
403 | ||
404 | ret = generate_agent_filter(rule, &agent_filter); | |
405 | if (ret) { | |
406 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
407 | goto error; | |
408 | } | |
409 | ||
410 | tracepoint->internal_filter.filter = agent_filter; | |
411 | break; | |
412 | } | |
413 | default: | |
414 | { | |
415 | if (filter) { | |
416 | tracepoint->internal_filter.filter = strdup(filter); | |
417 | if (tracepoint->internal_filter.filter == NULL) { | |
418 | ret_code = LTTNG_ERR_NOMEM; | |
419 | goto error; | |
420 | } | |
421 | } else { | |
422 | tracepoint->internal_filter.filter = NULL; | |
423 | } | |
424 | break; | |
425 | } | |
426 | } | |
427 | ||
428 | if (tracepoint->internal_filter.filter == NULL) { | |
429 | ret_code = LTTNG_OK; | |
430 | goto end; | |
431 | } | |
432 | ||
433 | ret = run_as_generate_filter_bytecode( | |
58daac01 | 434 | tracepoint->internal_filter.filter, creds, |
6d420eff JR |
435 | &bytecode); |
436 | if (ret) { | |
437 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
438 | goto end; | |
439 | } | |
440 | ||
441 | tracepoint->internal_filter.bytecode = bytecode; | |
442 | bytecode = NULL; | |
443 | ret_code = LTTNG_OK; | |
444 | ||
445 | error: | |
446 | end: | |
447 | free(bytecode); | |
448 | return ret_code; | |
449 | } | |
450 | ||
451 | static const char *lttng_event_rule_tracepoint_get_internal_filter( | |
452 | const struct lttng_event_rule *rule) | |
453 | { | |
454 | struct lttng_event_rule_tracepoint *tracepoint; | |
455 | ||
456 | assert(rule); | |
457 | tracepoint = container_of( | |
458 | rule, struct lttng_event_rule_tracepoint, parent); | |
459 | return tracepoint->internal_filter.filter; | |
460 | } | |
461 | ||
462 | static const struct lttng_filter_bytecode * | |
463 | lttng_event_rule_tracepoint_get_internal_filter_bytecode( | |
464 | const struct lttng_event_rule *rule) | |
465 | { | |
466 | struct lttng_event_rule_tracepoint *tracepoint; | |
467 | ||
468 | assert(rule); | |
469 | tracepoint = container_of( | |
470 | rule, struct lttng_event_rule_tracepoint, parent); | |
471 | return tracepoint->internal_filter.bytecode; | |
472 | } | |
473 | ||
474 | static struct lttng_event_exclusion * | |
475 | lttng_event_rule_tracepoint_generate_exclusions( | |
476 | const struct lttng_event_rule *rule) | |
477 | { | |
478 | enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE; | |
479 | enum lttng_event_rule_status status; | |
480 | struct lttng_event_exclusion *local_exclusions = NULL; | |
481 | struct lttng_event_exclusion *ret_exclusions = NULL; | |
482 | unsigned int nb_exclusions = 0; | |
483 | unsigned int i; | |
484 | ||
485 | status = lttng_event_rule_tracepoint_get_domain_type(rule, &domain_type); | |
486 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
487 | ||
488 | switch (domain_type) { | |
489 | case LTTNG_DOMAIN_KERNEL: | |
490 | case LTTNG_DOMAIN_JUL: | |
491 | case LTTNG_DOMAIN_LOG4J: | |
492 | case LTTNG_DOMAIN_PYTHON: | |
493 | /* Not supported. */ | |
494 | ret_exclusions = NULL; | |
495 | goto end; | |
496 | case LTTNG_DOMAIN_UST: | |
497 | /* Exclusions supported. */ | |
498 | break; | |
499 | default: | |
500 | abort(); | |
501 | } | |
502 | ||
503 | status = lttng_event_rule_tracepoint_get_exclusions_count( | |
504 | rule, &nb_exclusions); | |
505 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
506 | if (nb_exclusions == 0) { | |
507 | /* Nothing to do. */ | |
508 | ret_exclusions = NULL; | |
509 | goto end; | |
510 | } | |
511 | ||
512 | local_exclusions = zmalloc(sizeof(struct lttng_event_exclusion) + | |
513 | (LTTNG_SYMBOL_NAME_LEN * nb_exclusions)); | |
514 | if (!local_exclusions) { | |
515 | PERROR("Failed to allocate exclusions buffer"); | |
516 | ret_exclusions = NULL; | |
517 | goto end; | |
518 | } | |
519 | ||
520 | local_exclusions->count = nb_exclusions; | |
521 | for (i = 0; i < nb_exclusions; i++) { | |
522 | /* Truncation is already checked at the setter level. */ | |
523 | const char *tmp; | |
524 | ||
525 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
526 | rule, i, &tmp); | |
527 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
528 | strncpy(local_exclusions->names[i], tmp, LTTNG_SYMBOL_NAME_LEN); | |
529 | local_exclusions->names[i][LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
530 | } | |
531 | ||
532 | /* Pass ownership. */ | |
533 | ret_exclusions = local_exclusions; | |
534 | local_exclusions = NULL; | |
535 | end: | |
536 | free(local_exclusions); | |
537 | return ret_exclusions; | |
538 | } | |
539 | ||
540 | static void destroy_lttng_exclusions_element(void *ptr) | |
541 | { | |
542 | free(ptr); | |
543 | } | |
544 | ||
545 | struct lttng_event_rule *lttng_event_rule_tracepoint_create( | |
546 | enum lttng_domain_type domain_type) | |
547 | { | |
548 | struct lttng_event_rule *rule = NULL; | |
549 | struct lttng_event_rule_tracepoint *tp_rule; | |
550 | ||
551 | if (domain_type == LTTNG_DOMAIN_NONE) { | |
552 | goto end; | |
553 | } | |
554 | ||
555 | tp_rule = zmalloc(sizeof(struct lttng_event_rule_tracepoint)); | |
556 | if (!tp_rule) { | |
557 | goto end; | |
558 | } | |
559 | ||
560 | rule = &tp_rule->parent; | |
561 | lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_TRACEPOINT); | |
562 | tp_rule->parent.validate = lttng_event_rule_tracepoint_validate; | |
563 | tp_rule->parent.serialize = lttng_event_rule_tracepoint_serialize; | |
564 | tp_rule->parent.equal = lttng_event_rule_tracepoint_is_equal; | |
565 | tp_rule->parent.destroy = lttng_event_rule_tracepoint_destroy; | |
566 | tp_rule->parent.generate_filter_bytecode = | |
567 | lttng_event_rule_tracepoint_generate_filter_bytecode; | |
568 | tp_rule->parent.get_filter = | |
569 | lttng_event_rule_tracepoint_get_internal_filter; | |
570 | tp_rule->parent.get_filter_bytecode = | |
571 | lttng_event_rule_tracepoint_get_internal_filter_bytecode; | |
572 | tp_rule->parent.generate_exclusions = | |
573 | lttng_event_rule_tracepoint_generate_exclusions; | |
574 | ||
575 | tp_rule->domain = domain_type; | |
576 | tp_rule->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL; | |
577 | ||
578 | lttng_dynamic_pointer_array_init(&tp_rule->exclusions, | |
579 | destroy_lttng_exclusions_element); | |
580 | end: | |
581 | return rule; | |
582 | } | |
583 | ||
584 | LTTNG_HIDDEN | |
585 | ssize_t lttng_event_rule_tracepoint_create_from_payload( | |
586 | struct lttng_payload_view *view, | |
587 | struct lttng_event_rule **_event_rule) | |
588 | { | |
589 | ssize_t ret, offset = 0; | |
590 | int i; | |
591 | enum lttng_event_rule_status status; | |
592 | enum lttng_domain_type domain_type; | |
593 | enum lttng_loglevel_type loglevel_type; | |
594 | const struct lttng_event_rule_tracepoint_comm *tracepoint_comm; | |
595 | const char *pattern; | |
596 | const char *filter_expression = NULL; | |
597 | const char **exclusions = NULL; | |
598 | const uint32_t *exclusion_len; | |
599 | const char *exclusion; | |
600 | struct lttng_buffer_view current_buffer_view; | |
601 | struct lttng_event_rule *rule = NULL; | |
602 | ||
603 | if (!_event_rule) { | |
604 | ret = -1; | |
605 | goto end; | |
606 | } | |
607 | ||
3e6e0df2 JG |
608 | current_buffer_view = lttng_buffer_view_from_view( |
609 | &view->buffer, offset, sizeof(*tracepoint_comm)); | |
610 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
6d420eff JR |
611 | ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header."); |
612 | ret = -1; | |
613 | goto end; | |
614 | } | |
615 | ||
6d420eff JR |
616 | tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data; |
617 | ||
6d420eff JR |
618 | if (tracepoint_comm->domain_type <= LTTNG_DOMAIN_NONE || |
619 | tracepoint_comm->domain_type > LTTNG_DOMAIN_PYTHON) { | |
620 | /* Invalid domain value. */ | |
621 | ERR("Invalid domain type value (%i) found in tracepoint_comm buffer.", | |
622 | (int) tracepoint_comm->domain_type); | |
623 | ret = -1; | |
624 | goto end; | |
625 | } | |
626 | ||
627 | domain_type = (enum lttng_domain_type) tracepoint_comm->domain_type; | |
628 | rule = lttng_event_rule_tracepoint_create(domain_type); | |
629 | if (!rule) { | |
630 | ERR("Failed to create event rule tracepoint."); | |
631 | ret = -1; | |
632 | goto end; | |
633 | } | |
634 | ||
635 | loglevel_type = (enum lttng_loglevel_type) | |
636 | tracepoint_comm->loglevel_type; | |
637 | switch (loglevel_type) { | |
638 | case LTTNG_EVENT_LOGLEVEL_ALL: | |
639 | status = lttng_event_rule_tracepoint_set_log_level_all(rule); | |
640 | break; | |
641 | case LTTNG_EVENT_LOGLEVEL_RANGE: | |
642 | status = lttng_event_rule_tracepoint_set_log_level_range_lower_bound(rule, | |
643 | (enum lttng_loglevel_type) tracepoint_comm | |
644 | ->loglevel_value); | |
645 | break; | |
646 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
647 | status = lttng_event_rule_tracepoint_set_log_level(rule, | |
648 | (enum lttng_loglevel_type) tracepoint_comm | |
649 | ->loglevel_value); | |
650 | break; | |
651 | default: | |
652 | ERR("Failed to set event rule tracepoint loglevel: unknown loglevel type."); | |
653 | ret = -1; | |
654 | goto end; | |
655 | } | |
656 | ||
657 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
658 | ERR("Failed to set event rule tracepoint loglevel."); | |
659 | } | |
660 | ||
661 | /* Skip to payload. */ | |
662 | offset += current_buffer_view.size; | |
663 | ||
664 | /* Map the pattern. */ | |
665 | current_buffer_view = lttng_buffer_view_from_view( | |
666 | &view->buffer, offset, tracepoint_comm->pattern_len); | |
3e6e0df2 JG |
667 | |
668 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
6d420eff JR |
669 | ret = -1; |
670 | goto end; | |
671 | } | |
672 | ||
3e6e0df2 | 673 | pattern = current_buffer_view.data; |
6d420eff JR |
674 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, |
675 | tracepoint_comm->pattern_len)) { | |
676 | ret = -1; | |
677 | goto end; | |
678 | } | |
679 | ||
680 | /* Skip after the pattern. */ | |
681 | offset += tracepoint_comm->pattern_len; | |
682 | ||
683 | if (!tracepoint_comm->filter_expression_len) { | |
684 | goto skip_filter_expression; | |
685 | } | |
686 | ||
687 | /* Map the filter_expression. */ | |
688 | current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, | |
689 | tracepoint_comm->filter_expression_len); | |
3e6e0df2 | 690 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
6d420eff JR |
691 | ret = -1; |
692 | goto end; | |
693 | } | |
694 | ||
3e6e0df2 | 695 | filter_expression = current_buffer_view.data; |
6d420eff JR |
696 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, |
697 | filter_expression, | |
698 | tracepoint_comm->filter_expression_len)) { | |
699 | ret = -1; | |
700 | goto end; | |
701 | } | |
702 | ||
703 | /* Skip after the pattern. */ | |
704 | offset += tracepoint_comm->filter_expression_len; | |
705 | ||
706 | skip_filter_expression: | |
707 | for (i = 0; i < tracepoint_comm->exclusions_count; i++) { | |
708 | current_buffer_view = lttng_buffer_view_from_view( | |
709 | &view->buffer, offset, sizeof(*exclusion_len)); | |
3e6e0df2 | 710 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
6d420eff JR |
711 | ret = -1; |
712 | goto end; | |
713 | } | |
714 | ||
3e6e0df2 | 715 | exclusion_len = (typeof(exclusion_len)) current_buffer_view.data; |
6d420eff | 716 | offset += sizeof(*exclusion_len); |
3e6e0df2 | 717 | |
6d420eff JR |
718 | current_buffer_view = lttng_buffer_view_from_view( |
719 | &view->buffer, offset, *exclusion_len); | |
3e6e0df2 JG |
720 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
721 | ret = -1; | |
722 | goto end; | |
723 | } | |
724 | ||
6d420eff JR |
725 | exclusion = current_buffer_view.data; |
726 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, | |
727 | exclusion, *exclusion_len)) { | |
728 | ret = -1; | |
729 | goto end; | |
730 | } | |
731 | ||
732 | status = lttng_event_rule_tracepoint_add_exclusion(rule, exclusion); | |
733 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
734 | ERR("Failed to add event rule tracepoint exclusion \"%s\".", | |
735 | exclusion); | |
736 | ret = -1; | |
737 | goto end; | |
738 | } | |
739 | ||
740 | /* Skip to next exclusion. */ | |
741 | offset += *exclusion_len; | |
742 | } | |
743 | ||
744 | status = lttng_event_rule_tracepoint_set_pattern(rule, pattern); | |
745 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
746 | ERR("Failed to set event rule tracepoint pattern."); | |
747 | ret = -1; | |
748 | goto end; | |
749 | } | |
750 | ||
751 | if (filter_expression) { | |
752 | status = lttng_event_rule_tracepoint_set_filter( | |
753 | rule, filter_expression); | |
754 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
755 | ERR("Failed to set event rule tracepoint pattern."); | |
756 | ret = -1; | |
757 | goto end; | |
758 | } | |
759 | } | |
760 | ||
761 | *_event_rule = rule; | |
762 | rule = NULL; | |
763 | ret = offset; | |
764 | end: | |
765 | free(exclusions); | |
766 | lttng_event_rule_destroy(rule); | |
767 | return ret; | |
768 | } | |
769 | ||
770 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_pattern( | |
771 | struct lttng_event_rule *rule, const char *pattern) | |
772 | { | |
773 | char *pattern_copy = NULL; | |
774 | struct lttng_event_rule_tracepoint *tracepoint; | |
775 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
776 | ||
777 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern || | |
778 | strlen(pattern) == 0) { | |
779 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
780 | goto end; | |
781 | } | |
782 | ||
783 | tracepoint = container_of( | |
784 | rule, struct lttng_event_rule_tracepoint, parent); | |
785 | pattern_copy = strdup(pattern); | |
786 | if (!pattern_copy) { | |
787 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
788 | goto end; | |
789 | } | |
790 | ||
791 | free(tracepoint->pattern); | |
792 | ||
793 | tracepoint->pattern = pattern_copy; | |
794 | pattern_copy = NULL; | |
795 | end: | |
796 | return status; | |
797 | } | |
798 | ||
799 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_pattern( | |
800 | const struct lttng_event_rule *rule, const char **pattern) | |
801 | { | |
802 | struct lttng_event_rule_tracepoint *tracepoint; | |
803 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
804 | ||
805 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern) { | |
806 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
807 | goto end; | |
808 | } | |
809 | ||
810 | tracepoint = container_of( | |
811 | rule, struct lttng_event_rule_tracepoint, parent); | |
812 | if (!tracepoint->pattern) { | |
813 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
814 | goto end; | |
815 | } | |
816 | ||
817 | *pattern = tracepoint->pattern; | |
818 | end: | |
819 | return status; | |
820 | } | |
821 | ||
822 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_domain_type( | |
823 | const struct lttng_event_rule *rule, | |
824 | enum lttng_domain_type *type) | |
825 | { | |
826 | struct lttng_event_rule_tracepoint *tracepoint; | |
827 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
828 | ||
829 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) { | |
830 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
831 | goto end; | |
832 | } | |
833 | ||
834 | tracepoint = container_of( | |
835 | rule, struct lttng_event_rule_tracepoint, parent); | |
836 | *type = tracepoint->domain; | |
837 | end: | |
838 | return status; | |
839 | } | |
840 | ||
841 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_filter( | |
842 | struct lttng_event_rule *rule, const char *expression) | |
843 | { | |
844 | char *expression_copy = NULL; | |
845 | struct lttng_event_rule_tracepoint *tracepoint; | |
846 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
847 | ||
848 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression || | |
849 | strlen(expression) == 0) { | |
850 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
851 | goto end; | |
852 | } | |
853 | ||
854 | tracepoint = container_of( | |
855 | rule, struct lttng_event_rule_tracepoint, parent); | |
856 | expression_copy = strdup(expression); | |
857 | if (!expression_copy) { | |
858 | PERROR("Failed to copy filter expression"); | |
859 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
860 | goto end; | |
861 | } | |
862 | ||
863 | if (tracepoint->filter_expression) { | |
864 | free(tracepoint->filter_expression); | |
865 | } | |
866 | ||
867 | tracepoint->filter_expression = expression_copy; | |
868 | expression_copy = NULL; | |
869 | end: | |
870 | return status; | |
871 | } | |
872 | ||
873 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_filter( | |
874 | const struct lttng_event_rule *rule, const char **expression) | |
875 | { | |
876 | struct lttng_event_rule_tracepoint *tracepoint; | |
877 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
878 | ||
879 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression) { | |
880 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
881 | goto end; | |
882 | } | |
883 | ||
884 | tracepoint = container_of( | |
885 | rule, struct lttng_event_rule_tracepoint, parent); | |
886 | if (!tracepoint->filter_expression) { | |
887 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
888 | goto end; | |
889 | } | |
890 | ||
891 | *expression = tracepoint->filter_expression; | |
892 | end: | |
893 | return status; | |
894 | } | |
895 | ||
896 | static bool log_level_value_valid( | |
897 | int level, enum lttng_domain_type domain) | |
898 | { | |
899 | bool valid = false; | |
900 | ||
901 | switch (domain) { | |
902 | case LTTNG_DOMAIN_KERNEL: | |
903 | case LTTNG_DOMAIN_UST: | |
904 | if (level < LTTNG_LOGLEVEL_EMERG) { | |
905 | /* Invalid. */ | |
906 | goto end; | |
907 | } | |
908 | if (level > LTTNG_LOGLEVEL_DEBUG) { | |
909 | /* Invalid. */ | |
910 | goto end; | |
911 | } | |
912 | ||
913 | valid = true; | |
914 | break; | |
915 | case LTTNG_DOMAIN_JUL: | |
916 | case LTTNG_DOMAIN_LOG4J: | |
917 | case LTTNG_DOMAIN_PYTHON: | |
918 | /* | |
919 | * For both JUL and LOG4J custom log level are possible and can | |
920 | * spawn the entire int32 range. | |
921 | * For python, custom log level are possible, it is not clear if | |
922 | * negative value are accepted (NOTSET == 0) but the source code | |
923 | * validate against the int type implying that negative values | |
924 | * are accepted. | |
925 | */ | |
926 | valid = true; | |
927 | goto end; | |
928 | ||
929 | case LTTNG_DOMAIN_NONE: | |
930 | default: | |
931 | abort(); | |
932 | } | |
933 | ||
934 | end: | |
935 | return valid; | |
936 | } | |
937 | ||
938 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level( | |
939 | struct lttng_event_rule *rule, int level) | |
940 | { | |
941 | struct lttng_event_rule_tracepoint *tracepoint; | |
942 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
943 | ||
944 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
945 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
946 | goto end; | |
947 | } | |
948 | ||
949 | tracepoint = container_of( | |
950 | rule, struct lttng_event_rule_tracepoint, parent); | |
951 | ||
952 | if (!log_level_value_valid(level, tracepoint->domain)) { | |
953 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
954 | goto end; | |
955 | } | |
956 | ||
957 | tracepoint->loglevel.value = level; | |
958 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
959 | end: | |
960 | return status; | |
961 | } | |
962 | ||
963 | enum lttng_event_rule_status | |
964 | lttng_event_rule_tracepoint_set_log_level_range_lower_bound( | |
965 | struct lttng_event_rule *rule, int level) | |
966 | { | |
967 | struct lttng_event_rule_tracepoint *tracepoint; | |
968 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
969 | ||
970 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
971 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
972 | goto end; | |
973 | } | |
974 | ||
975 | tracepoint = container_of( | |
976 | rule, struct lttng_event_rule_tracepoint, parent); | |
977 | ||
978 | if (!log_level_value_valid(level, tracepoint->domain)) { | |
979 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
980 | goto end; | |
981 | } | |
982 | ||
983 | tracepoint->loglevel.value = level; | |
984 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
985 | end: | |
986 | return status; | |
987 | } | |
988 | ||
989 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level_all( | |
990 | struct lttng_event_rule *rule) | |
991 | { | |
992 | struct lttng_event_rule_tracepoint *tracepoint; | |
993 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
994 | ||
995 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
996 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
997 | goto end; | |
998 | } | |
999 | ||
1000 | tracepoint = container_of( | |
1001 | rule, struct lttng_event_rule_tracepoint, parent); | |
1002 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL; | |
1003 | end: | |
1004 | return status; | |
1005 | } | |
1006 | ||
1007 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level_type( | |
1008 | const struct lttng_event_rule *rule, | |
1009 | enum lttng_loglevel_type *type) | |
1010 | { | |
1011 | struct lttng_event_rule_tracepoint *tracepoint; | |
1012 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1013 | ||
1014 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) { | |
1015 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1016 | goto end; | |
1017 | } | |
1018 | ||
1019 | tracepoint = container_of( | |
1020 | rule, struct lttng_event_rule_tracepoint, parent); | |
1021 | *type = tracepoint->loglevel.type; | |
1022 | end: | |
1023 | return status; | |
1024 | } | |
1025 | ||
1026 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level( | |
1027 | const struct lttng_event_rule *rule, int *level) | |
1028 | { | |
1029 | struct lttng_event_rule_tracepoint *tracepoint; | |
1030 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1031 | ||
1032 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !level) { | |
1033 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1034 | goto end; | |
1035 | } | |
1036 | ||
1037 | tracepoint = container_of( | |
1038 | rule, struct lttng_event_rule_tracepoint, parent); | |
1039 | if (tracepoint->loglevel.type == LTTNG_EVENT_LOGLEVEL_ALL) { | |
1040 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
1041 | goto end; | |
1042 | } | |
1043 | ||
1044 | *level = tracepoint->loglevel.value; | |
1045 | end: | |
1046 | return status; | |
1047 | } | |
1048 | ||
1049 | enum lttng_event_rule_status lttng_event_rule_tracepoint_add_exclusion( | |
1050 | struct lttng_event_rule *rule, | |
1051 | const char *exclusion) | |
1052 | { | |
1053 | int ret; | |
1054 | char *exclusion_copy = NULL; | |
1055 | struct lttng_event_rule_tracepoint *tracepoint; | |
1056 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1057 | enum lttng_domain_type domain_type; | |
1058 | ||
1059 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || | |
1060 | !exclusion) { | |
1061 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1062 | goto end; | |
1063 | } | |
1064 | ||
1065 | tracepoint = container_of( | |
1066 | rule, struct lttng_event_rule_tracepoint, parent); | |
1067 | ||
1068 | status = lttng_event_rule_tracepoint_get_domain_type( | |
1069 | rule, &domain_type); | |
1070 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
1071 | goto end; | |
1072 | } | |
1073 | ||
1074 | switch (domain_type) { | |
1075 | case LTTNG_DOMAIN_KERNEL: | |
1076 | case LTTNG_DOMAIN_JUL: | |
1077 | case LTTNG_DOMAIN_LOG4J: | |
1078 | case LTTNG_DOMAIN_PYTHON: | |
1079 | status = LTTNG_EVENT_RULE_STATUS_UNSUPPORTED; | |
1080 | goto end; | |
1081 | case LTTNG_DOMAIN_UST: | |
1082 | /* Exclusions supported. */ | |
1083 | break; | |
1084 | default: | |
1085 | abort(); | |
1086 | } | |
1087 | ||
1088 | if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) { | |
1089 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1090 | goto end; | |
1091 | } | |
1092 | ||
1093 | exclusion_copy = strdup(exclusion); | |
1094 | if (!exclusion_copy) { | |
1095 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1096 | goto end; | |
1097 | } | |
1098 | ||
1099 | ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions, | |
1100 | exclusion_copy); | |
1101 | if (ret < 0) { | |
1102 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1103 | goto end; | |
1104 | } | |
1105 | ||
1106 | exclusion_copy = NULL; | |
1107 | end: | |
1108 | free(exclusion_copy); | |
1109 | return status; | |
1110 | } | |
1111 | ||
1112 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusions_count( | |
1113 | const struct lttng_event_rule *rule, unsigned int *count) | |
1114 | { | |
1115 | struct lttng_event_rule_tracepoint *tracepoint; | |
1116 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1117 | ||
1118 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !count) { | |
1119 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1120 | goto end; | |
1121 | } | |
1122 | ||
1123 | tracepoint = container_of( | |
1124 | rule, struct lttng_event_rule_tracepoint, parent); | |
1125 | *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions); | |
1126 | end: | |
1127 | return status; | |
1128 | } | |
1129 | ||
1130 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusion_at_index( | |
1131 | const struct lttng_event_rule *rule, | |
1132 | unsigned int index, | |
1133 | const char **exclusion) | |
1134 | { | |
1135 | unsigned int count; | |
1136 | struct lttng_event_rule_tracepoint *tracepoint; | |
1137 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1138 | ||
1139 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { | |
1140 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1141 | goto end; | |
1142 | } | |
1143 | ||
1144 | tracepoint = container_of( | |
1145 | rule, struct lttng_event_rule_tracepoint, parent); | |
1146 | if (lttng_event_rule_tracepoint_get_exclusions_count(rule, &count) != | |
1147 | LTTNG_EVENT_RULE_STATUS_OK) { | |
1148 | goto end; | |
1149 | } | |
1150 | ||
1151 | if (index >= count) { | |
1152 | goto end; | |
1153 | } | |
1154 | ||
1155 | *exclusion = lttng_dynamic_pointer_array_get_pointer( | |
1156 | &tracepoint->exclusions, index); | |
1157 | end: | |
1158 | return status; | |
1159 | } |