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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> | |
959e3c66 JR |
15 | #include <common/hashtable/hashtable.h> |
16 | #include <common/hashtable/utils.h> | |
6d420eff JR |
17 | #include <lttng/event-rule/event-rule-internal.h> |
18 | #include <lttng/event-rule/tracepoint-internal.h> | |
19 | ||
20 | #define IS_TRACEPOINT_EVENT_RULE(rule) \ | |
21 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_TRACEPOINT) | |
22 | ||
23 | static void lttng_event_rule_tracepoint_destroy(struct lttng_event_rule *rule) | |
24 | { | |
25 | struct lttng_event_rule_tracepoint *tracepoint; | |
26 | ||
27 | if (rule == NULL) { | |
28 | return; | |
29 | } | |
30 | ||
31 | tracepoint = container_of( | |
32 | rule, struct lttng_event_rule_tracepoint, parent); | |
33 | ||
34 | lttng_dynamic_pointer_array_reset(&tracepoint->exclusions); | |
35 | free(tracepoint->pattern); | |
36 | free(tracepoint->filter_expression); | |
37 | free(tracepoint->internal_filter.filter); | |
38 | free(tracepoint->internal_filter.bytecode); | |
39 | free(tracepoint); | |
40 | } | |
41 | ||
42 | static bool lttng_event_rule_tracepoint_validate( | |
43 | const struct lttng_event_rule *rule) | |
44 | { | |
45 | bool valid = false; | |
46 | struct lttng_event_rule_tracepoint *tracepoint; | |
47 | ||
48 | if (!rule) { | |
49 | goto end; | |
50 | } | |
51 | ||
52 | tracepoint = container_of( | |
53 | rule, struct lttng_event_rule_tracepoint, parent); | |
54 | ||
55 | /* Required field. */ | |
56 | if (!tracepoint->pattern) { | |
57 | ERR("Invalid tracepoint event rule: a pattern must be set."); | |
58 | goto end; | |
59 | } | |
60 | ||
61 | /* Required field. */ | |
62 | if (tracepoint->domain == LTTNG_DOMAIN_NONE) { | |
63 | ERR("Invalid tracepoint event rule: a domain must be set."); | |
64 | goto end; | |
65 | } | |
66 | ||
67 | valid = true; | |
68 | end: | |
69 | return valid; | |
70 | } | |
71 | ||
72 | static int lttng_event_rule_tracepoint_serialize( | |
73 | const struct lttng_event_rule *rule, | |
74 | struct lttng_payload *payload) | |
75 | { | |
76 | int ret, i; | |
77 | size_t pattern_len, filter_expression_len, exclusions_len; | |
78 | struct lttng_event_rule_tracepoint *tracepoint; | |
79 | struct lttng_event_rule_tracepoint_comm tracepoint_comm; | |
80 | enum lttng_event_rule_status status; | |
81 | unsigned int exclusion_count; | |
82 | size_t exclusions_appended_len = 0; | |
83 | ||
84 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
85 | ret = -1; | |
86 | goto end; | |
87 | } | |
88 | ||
89 | DBG("Serializing tracepoint event rule."); | |
90 | tracepoint = container_of( | |
91 | rule, struct lttng_event_rule_tracepoint, parent); | |
92 | ||
93 | status = lttng_event_rule_tracepoint_get_exclusions_count(rule, &exclusion_count); | |
94 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
95 | ||
96 | pattern_len = strlen(tracepoint->pattern) + 1; | |
97 | ||
98 | if (tracepoint->filter_expression != NULL) { | |
99 | filter_expression_len = | |
100 | strlen(tracepoint->filter_expression) + 1; | |
101 | } else { | |
102 | filter_expression_len = 0; | |
103 | } | |
104 | ||
105 | exclusions_len = 0; | |
106 | for (i = 0; i < exclusion_count; i++) { | |
107 | const char *exclusion; | |
108 | ||
109 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
110 | rule, i, &exclusion); | |
111 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
112 | ||
113 | /* Length field. */ | |
114 | exclusions_len += sizeof(uint32_t); | |
115 | /* Payload (null terminated). */ | |
116 | exclusions_len += strlen(exclusion) + 1; | |
117 | } | |
118 | ||
119 | tracepoint_comm.domain_type = (int8_t) tracepoint->domain; | |
120 | tracepoint_comm.loglevel_type = (int8_t) tracepoint->loglevel.type; | |
121 | tracepoint_comm.loglevel_value = tracepoint->loglevel.value; | |
122 | tracepoint_comm.pattern_len = pattern_len; | |
123 | tracepoint_comm.filter_expression_len = filter_expression_len; | |
124 | tracepoint_comm.exclusions_count = exclusion_count; | |
125 | tracepoint_comm.exclusions_len = exclusions_len; | |
126 | ||
127 | ret = lttng_dynamic_buffer_append(&payload->buffer, &tracepoint_comm, | |
128 | sizeof(tracepoint_comm)); | |
129 | if (ret) { | |
130 | goto end; | |
131 | } | |
132 | ||
133 | ret = lttng_dynamic_buffer_append( | |
134 | &payload->buffer, tracepoint->pattern, pattern_len); | |
135 | if (ret) { | |
136 | goto end; | |
137 | } | |
138 | ||
139 | ret = lttng_dynamic_buffer_append(&payload->buffer, tracepoint->filter_expression, | |
140 | filter_expression_len); | |
141 | if (ret) { | |
142 | goto end; | |
143 | } | |
144 | ||
145 | for (i = 0; i < exclusion_count; i++) { | |
146 | size_t len; | |
147 | const char *exclusion; | |
148 | ||
149 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
150 | rule, i, &exclusion); | |
151 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
152 | ||
153 | len = strlen(exclusion) + 1; | |
154 | /* Append exclusion length, includes the null terminator. */ | |
155 | ret = lttng_dynamic_buffer_append( | |
156 | &payload->buffer, &len, sizeof(uint32_t)); | |
157 | if (ret) { | |
158 | goto end; | |
159 | } | |
160 | ||
161 | exclusions_appended_len += sizeof(uint32_t); | |
162 | ||
163 | /* Include the '\0' in the payload. */ | |
164 | ret = lttng_dynamic_buffer_append( | |
165 | &payload->buffer, exclusion, len); | |
166 | if (ret) { | |
167 | goto end; | |
168 | } | |
169 | ||
170 | exclusions_appended_len += len; | |
171 | } | |
172 | ||
173 | assert(exclusions_len == exclusions_appended_len); | |
174 | ||
175 | end: | |
176 | return ret; | |
177 | } | |
178 | ||
179 | static bool lttng_event_rule_tracepoint_is_equal( | |
180 | const struct lttng_event_rule *_a, | |
181 | const struct lttng_event_rule *_b) | |
182 | { | |
183 | int i; | |
184 | bool is_equal = false; | |
185 | struct lttng_event_rule_tracepoint *a, *b; | |
186 | unsigned int count_a, count_b; | |
187 | enum lttng_event_rule_status status; | |
188 | ||
189 | a = container_of(_a, struct lttng_event_rule_tracepoint, parent); | |
190 | b = container_of(_b, struct lttng_event_rule_tracepoint, parent); | |
191 | ||
192 | status = lttng_event_rule_tracepoint_get_exclusions_count(_a, &count_a); | |
193 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
194 | status = lttng_event_rule_tracepoint_get_exclusions_count(_b, &count_b); | |
195 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
196 | ||
197 | /* Quick checks. */ | |
198 | if (a->domain != b->domain) { | |
199 | goto end; | |
200 | } | |
201 | ||
202 | if (count_a != count_b) { | |
203 | goto end; | |
204 | } | |
205 | ||
206 | if (!!a->filter_expression != !!b->filter_expression) { | |
207 | goto end; | |
208 | } | |
209 | ||
210 | /* Long check. */ | |
211 | assert(a->pattern); | |
212 | assert(b->pattern); | |
213 | if (strcmp(a->pattern, b->pattern)) { | |
214 | goto end; | |
215 | } | |
216 | ||
217 | if (a->filter_expression && b->filter_expression) { | |
218 | if (strcmp(a->filter_expression, b->filter_expression)) { | |
219 | goto end; | |
220 | } | |
221 | } else if (!!a->filter_expression != !!b->filter_expression) { | |
222 | /* One is set; not the other. */ | |
223 | goto end; | |
224 | } | |
225 | ||
226 | if (a->loglevel.type != b->loglevel.type) { | |
227 | goto end; | |
228 | } | |
229 | ||
230 | if (a->loglevel.value != b->loglevel.value) { | |
231 | goto end; | |
232 | } | |
233 | ||
234 | for (i = 0; i < count_a; i++) { | |
235 | const char *exclusion_a, *exclusion_b; | |
236 | ||
237 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
238 | _a, i, &exclusion_a); | |
239 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
240 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
241 | _b, i, &exclusion_b); | |
242 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
243 | if (strcmp(exclusion_a, exclusion_b)) { | |
244 | goto end; | |
245 | } | |
246 | } | |
247 | ||
248 | is_equal = true; | |
249 | end: | |
250 | return is_equal; | |
251 | } | |
252 | ||
253 | /* | |
254 | * On success ret is 0; | |
255 | * | |
256 | * On error ret is negative. | |
257 | * | |
258 | * An event with NO loglevel and the name is * will return NULL. | |
259 | */ | |
260 | static int generate_agent_filter( | |
261 | const struct lttng_event_rule *rule, char **_agent_filter) | |
262 | { | |
263 | int err; | |
264 | int ret = 0; | |
265 | char *agent_filter = NULL; | |
266 | const char *pattern; | |
267 | const char *filter; | |
268 | enum lttng_loglevel_type loglevel_type; | |
269 | enum lttng_event_rule_status status; | |
270 | ||
271 | assert(rule); | |
272 | assert(_agent_filter); | |
273 | ||
274 | status = lttng_event_rule_tracepoint_get_pattern(rule, &pattern); | |
275 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
276 | ret = -1; | |
277 | goto end; | |
278 | } | |
279 | ||
280 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); | |
281 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
282 | filter = NULL; | |
283 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
284 | ret = -1; | |
285 | goto end; | |
286 | } | |
287 | ||
288 | status = lttng_event_rule_tracepoint_get_log_level_type( | |
289 | rule, &loglevel_type); | |
290 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
291 | ret = -1; | |
292 | goto end; | |
293 | } | |
294 | ||
295 | /* Don't add filter for the '*' event. */ | |
296 | if (strcmp(pattern, "*") != 0) { | |
297 | if (filter) { | |
298 | err = asprintf(&agent_filter, | |
299 | "(%s) && (logger_name == \"%s\")", | |
300 | filter, pattern); | |
301 | } else { | |
302 | err = asprintf(&agent_filter, "logger_name == \"%s\"", | |
303 | pattern); | |
304 | } | |
305 | ||
306 | if (err < 0) { | |
307 | PERROR("Failed to format agent filter string"); | |
308 | ret = -1; | |
309 | goto end; | |
310 | } | |
311 | } | |
312 | ||
313 | if (loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
314 | const char *op; | |
315 | int loglevel_value; | |
316 | ||
317 | status = lttng_event_rule_tracepoint_get_log_level( | |
318 | rule, &loglevel_value); | |
319 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
320 | ret = -1; | |
321 | goto end; | |
322 | } | |
323 | ||
324 | if (loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
325 | op = ">="; | |
326 | } else { | |
327 | op = "=="; | |
328 | } | |
329 | ||
330 | if (filter || agent_filter) { | |
331 | char *new_filter; | |
332 | ||
333 | err = asprintf(&new_filter, | |
334 | "(%s) && (int_loglevel %s %d)", | |
335 | agent_filter ? agent_filter : filter, | |
336 | op, loglevel_value); | |
337 | if (agent_filter) { | |
338 | free(agent_filter); | |
339 | } | |
340 | agent_filter = new_filter; | |
341 | } else { | |
342 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, | |
343 | loglevel_value); | |
344 | } | |
345 | ||
346 | if (err < 0) { | |
347 | PERROR("Failed to format agent filter string"); | |
348 | ret = -1; | |
349 | goto end; | |
350 | } | |
351 | } | |
352 | ||
353 | *_agent_filter = agent_filter; | |
354 | agent_filter = NULL; | |
355 | ||
356 | end: | |
357 | free(agent_filter); | |
358 | return ret; | |
359 | } | |
360 | ||
361 | static enum lttng_error_code | |
362 | lttng_event_rule_tracepoint_generate_filter_bytecode( | |
58daac01 JR |
363 | struct lttng_event_rule *rule, |
364 | const struct lttng_credentials *creds) | |
6d420eff JR |
365 | { |
366 | int ret; | |
367 | enum lttng_error_code ret_code; | |
368 | struct lttng_event_rule_tracepoint *tracepoint; | |
369 | enum lttng_domain_type domain_type; | |
370 | enum lttng_event_rule_status status; | |
371 | const char *filter; | |
372 | struct lttng_filter_bytecode *bytecode = NULL; | |
373 | ||
374 | assert(rule); | |
375 | ||
376 | tracepoint = container_of( | |
377 | rule, struct lttng_event_rule_tracepoint, parent); | |
378 | ||
379 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); | |
380 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
381 | filter = NULL; | |
382 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
383 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
384 | goto end; | |
385 | } | |
386 | ||
387 | if (filter && filter[0] == '\0') { | |
388 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
389 | goto error; | |
390 | } | |
391 | ||
392 | status = lttng_event_rule_tracepoint_get_domain_type( | |
393 | rule, &domain_type); | |
394 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
395 | ret_code = LTTNG_ERR_UNK; | |
396 | goto error; | |
397 | } | |
398 | ||
399 | switch (domain_type) { | |
400 | case LTTNG_DOMAIN_LOG4J: | |
401 | case LTTNG_DOMAIN_JUL: | |
402 | case LTTNG_DOMAIN_PYTHON: | |
403 | { | |
404 | char *agent_filter; | |
405 | ||
406 | ret = generate_agent_filter(rule, &agent_filter); | |
407 | if (ret) { | |
408 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
409 | goto error; | |
410 | } | |
411 | ||
412 | tracepoint->internal_filter.filter = agent_filter; | |
413 | break; | |
414 | } | |
415 | default: | |
416 | { | |
417 | if (filter) { | |
418 | tracepoint->internal_filter.filter = strdup(filter); | |
419 | if (tracepoint->internal_filter.filter == NULL) { | |
420 | ret_code = LTTNG_ERR_NOMEM; | |
421 | goto error; | |
422 | } | |
423 | } else { | |
424 | tracepoint->internal_filter.filter = NULL; | |
425 | } | |
426 | break; | |
427 | } | |
428 | } | |
429 | ||
430 | if (tracepoint->internal_filter.filter == NULL) { | |
431 | ret_code = LTTNG_OK; | |
432 | goto end; | |
433 | } | |
434 | ||
435 | ret = run_as_generate_filter_bytecode( | |
58daac01 | 436 | tracepoint->internal_filter.filter, creds, |
6d420eff JR |
437 | &bytecode); |
438 | if (ret) { | |
439 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
440 | goto end; | |
441 | } | |
442 | ||
443 | tracepoint->internal_filter.bytecode = bytecode; | |
444 | bytecode = NULL; | |
445 | ret_code = LTTNG_OK; | |
446 | ||
447 | error: | |
448 | end: | |
449 | free(bytecode); | |
450 | return ret_code; | |
451 | } | |
452 | ||
453 | static const char *lttng_event_rule_tracepoint_get_internal_filter( | |
454 | const struct lttng_event_rule *rule) | |
455 | { | |
456 | struct lttng_event_rule_tracepoint *tracepoint; | |
457 | ||
458 | assert(rule); | |
459 | tracepoint = container_of( | |
460 | rule, struct lttng_event_rule_tracepoint, parent); | |
461 | return tracepoint->internal_filter.filter; | |
462 | } | |
463 | ||
464 | static const struct lttng_filter_bytecode * | |
465 | lttng_event_rule_tracepoint_get_internal_filter_bytecode( | |
466 | const struct lttng_event_rule *rule) | |
467 | { | |
468 | struct lttng_event_rule_tracepoint *tracepoint; | |
469 | ||
470 | assert(rule); | |
471 | tracepoint = container_of( | |
472 | rule, struct lttng_event_rule_tracepoint, parent); | |
473 | return tracepoint->internal_filter.bytecode; | |
474 | } | |
475 | ||
476 | static struct lttng_event_exclusion * | |
477 | lttng_event_rule_tracepoint_generate_exclusions( | |
478 | const struct lttng_event_rule *rule) | |
479 | { | |
480 | enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE; | |
481 | enum lttng_event_rule_status status; | |
482 | struct lttng_event_exclusion *local_exclusions = NULL; | |
483 | struct lttng_event_exclusion *ret_exclusions = NULL; | |
484 | unsigned int nb_exclusions = 0; | |
485 | unsigned int i; | |
486 | ||
487 | status = lttng_event_rule_tracepoint_get_domain_type(rule, &domain_type); | |
488 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
489 | ||
490 | switch (domain_type) { | |
491 | case LTTNG_DOMAIN_KERNEL: | |
492 | case LTTNG_DOMAIN_JUL: | |
493 | case LTTNG_DOMAIN_LOG4J: | |
494 | case LTTNG_DOMAIN_PYTHON: | |
495 | /* Not supported. */ | |
496 | ret_exclusions = NULL; | |
497 | goto end; | |
498 | case LTTNG_DOMAIN_UST: | |
499 | /* Exclusions supported. */ | |
500 | break; | |
501 | default: | |
502 | abort(); | |
503 | } | |
504 | ||
505 | status = lttng_event_rule_tracepoint_get_exclusions_count( | |
506 | rule, &nb_exclusions); | |
507 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
508 | if (nb_exclusions == 0) { | |
509 | /* Nothing to do. */ | |
510 | ret_exclusions = NULL; | |
511 | goto end; | |
512 | } | |
513 | ||
514 | local_exclusions = zmalloc(sizeof(struct lttng_event_exclusion) + | |
515 | (LTTNG_SYMBOL_NAME_LEN * nb_exclusions)); | |
516 | if (!local_exclusions) { | |
517 | PERROR("Failed to allocate exclusions buffer"); | |
518 | ret_exclusions = NULL; | |
519 | goto end; | |
520 | } | |
521 | ||
522 | local_exclusions->count = nb_exclusions; | |
523 | for (i = 0; i < nb_exclusions; i++) { | |
524 | /* Truncation is already checked at the setter level. */ | |
525 | const char *tmp; | |
526 | ||
527 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
528 | rule, i, &tmp); | |
529 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
530 | strncpy(local_exclusions->names[i], tmp, LTTNG_SYMBOL_NAME_LEN); | |
531 | local_exclusions->names[i][LTTNG_SYMBOL_NAME_LEN - 1] = '\0'; | |
532 | } | |
533 | ||
534 | /* Pass ownership. */ | |
535 | ret_exclusions = local_exclusions; | |
536 | local_exclusions = NULL; | |
537 | end: | |
538 | free(local_exclusions); | |
539 | return ret_exclusions; | |
540 | } | |
541 | ||
542 | static void destroy_lttng_exclusions_element(void *ptr) | |
543 | { | |
544 | free(ptr); | |
545 | } | |
546 | ||
959e3c66 JR |
547 | static unsigned long lttng_event_rule_tracepoint_hash( |
548 | const struct lttng_event_rule *rule) | |
549 | { | |
550 | unsigned long hash; | |
551 | unsigned int i, exclusion_count; | |
552 | enum lttng_event_rule_status status; | |
553 | struct lttng_event_rule_tracepoint *tp_rule = | |
554 | container_of(rule, typeof(*tp_rule), parent); | |
555 | ||
556 | hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_TRACEPOINT, | |
557 | lttng_ht_seed); | |
558 | hash ^= hash_key_ulong((void *) tp_rule->domain, lttng_ht_seed); | |
559 | hash ^= hash_key_str(tp_rule->pattern, lttng_ht_seed); | |
560 | ||
561 | if (tp_rule->filter_expression) { | |
562 | hash ^= hash_key_str(tp_rule->filter_expression, lttng_ht_seed); | |
563 | } | |
564 | ||
565 | hash ^= hash_key_ulong((void *) tp_rule->loglevel.type, | |
566 | lttng_ht_seed); | |
567 | if (tp_rule->loglevel.type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
568 | hash ^= hash_key_ulong( | |
569 | (void *) (unsigned long) tp_rule->loglevel.value, | |
570 | lttng_ht_seed); | |
571 | } | |
572 | ||
573 | status = lttng_event_rule_tracepoint_get_exclusions_count(rule, | |
574 | &exclusion_count); | |
575 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
576 | ||
577 | for (i = 0; i < exclusion_count; i++) { | |
578 | const char *exclusion; | |
579 | ||
580 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
581 | rule, i, &exclusion); | |
582 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
583 | hash ^= hash_key_str(exclusion, lttng_ht_seed); | |
584 | } | |
585 | ||
586 | return hash; | |
587 | } | |
588 | ||
6d420eff JR |
589 | struct lttng_event_rule *lttng_event_rule_tracepoint_create( |
590 | enum lttng_domain_type domain_type) | |
591 | { | |
592 | struct lttng_event_rule *rule = NULL; | |
593 | struct lttng_event_rule_tracepoint *tp_rule; | |
594 | ||
595 | if (domain_type == LTTNG_DOMAIN_NONE) { | |
596 | goto end; | |
597 | } | |
598 | ||
599 | tp_rule = zmalloc(sizeof(struct lttng_event_rule_tracepoint)); | |
600 | if (!tp_rule) { | |
601 | goto end; | |
602 | } | |
603 | ||
604 | rule = &tp_rule->parent; | |
605 | lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_TRACEPOINT); | |
606 | tp_rule->parent.validate = lttng_event_rule_tracepoint_validate; | |
607 | tp_rule->parent.serialize = lttng_event_rule_tracepoint_serialize; | |
608 | tp_rule->parent.equal = lttng_event_rule_tracepoint_is_equal; | |
609 | tp_rule->parent.destroy = lttng_event_rule_tracepoint_destroy; | |
610 | tp_rule->parent.generate_filter_bytecode = | |
611 | lttng_event_rule_tracepoint_generate_filter_bytecode; | |
612 | tp_rule->parent.get_filter = | |
613 | lttng_event_rule_tracepoint_get_internal_filter; | |
614 | tp_rule->parent.get_filter_bytecode = | |
615 | lttng_event_rule_tracepoint_get_internal_filter_bytecode; | |
616 | tp_rule->parent.generate_exclusions = | |
617 | lttng_event_rule_tracepoint_generate_exclusions; | |
959e3c66 | 618 | tp_rule->parent.hash = lttng_event_rule_tracepoint_hash; |
6d420eff JR |
619 | |
620 | tp_rule->domain = domain_type; | |
621 | tp_rule->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL; | |
622 | ||
623 | lttng_dynamic_pointer_array_init(&tp_rule->exclusions, | |
624 | destroy_lttng_exclusions_element); | |
625 | end: | |
626 | return rule; | |
627 | } | |
628 | ||
629 | LTTNG_HIDDEN | |
630 | ssize_t lttng_event_rule_tracepoint_create_from_payload( | |
631 | struct lttng_payload_view *view, | |
632 | struct lttng_event_rule **_event_rule) | |
633 | { | |
634 | ssize_t ret, offset = 0; | |
635 | int i; | |
636 | enum lttng_event_rule_status status; | |
637 | enum lttng_domain_type domain_type; | |
638 | enum lttng_loglevel_type loglevel_type; | |
639 | const struct lttng_event_rule_tracepoint_comm *tracepoint_comm; | |
640 | const char *pattern; | |
641 | const char *filter_expression = NULL; | |
642 | const char **exclusions = NULL; | |
643 | const uint32_t *exclusion_len; | |
644 | const char *exclusion; | |
645 | struct lttng_buffer_view current_buffer_view; | |
646 | struct lttng_event_rule *rule = NULL; | |
647 | ||
648 | if (!_event_rule) { | |
649 | ret = -1; | |
650 | goto end; | |
651 | } | |
652 | ||
3e6e0df2 JG |
653 | current_buffer_view = lttng_buffer_view_from_view( |
654 | &view->buffer, offset, sizeof(*tracepoint_comm)); | |
655 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
6d420eff JR |
656 | ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header."); |
657 | ret = -1; | |
658 | goto end; | |
659 | } | |
660 | ||
6d420eff JR |
661 | tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data; |
662 | ||
6d420eff JR |
663 | if (tracepoint_comm->domain_type <= LTTNG_DOMAIN_NONE || |
664 | tracepoint_comm->domain_type > LTTNG_DOMAIN_PYTHON) { | |
665 | /* Invalid domain value. */ | |
666 | ERR("Invalid domain type value (%i) found in tracepoint_comm buffer.", | |
667 | (int) tracepoint_comm->domain_type); | |
668 | ret = -1; | |
669 | goto end; | |
670 | } | |
671 | ||
672 | domain_type = (enum lttng_domain_type) tracepoint_comm->domain_type; | |
673 | rule = lttng_event_rule_tracepoint_create(domain_type); | |
674 | if (!rule) { | |
675 | ERR("Failed to create event rule tracepoint."); | |
676 | ret = -1; | |
677 | goto end; | |
678 | } | |
679 | ||
680 | loglevel_type = (enum lttng_loglevel_type) | |
681 | tracepoint_comm->loglevel_type; | |
682 | switch (loglevel_type) { | |
683 | case LTTNG_EVENT_LOGLEVEL_ALL: | |
684 | status = lttng_event_rule_tracepoint_set_log_level_all(rule); | |
685 | break; | |
686 | case LTTNG_EVENT_LOGLEVEL_RANGE: | |
687 | status = lttng_event_rule_tracepoint_set_log_level_range_lower_bound(rule, | |
688 | (enum lttng_loglevel_type) tracepoint_comm | |
689 | ->loglevel_value); | |
690 | break; | |
691 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
692 | status = lttng_event_rule_tracepoint_set_log_level(rule, | |
693 | (enum lttng_loglevel_type) tracepoint_comm | |
694 | ->loglevel_value); | |
695 | break; | |
696 | default: | |
697 | ERR("Failed to set event rule tracepoint loglevel: unknown loglevel type."); | |
698 | ret = -1; | |
699 | goto end; | |
700 | } | |
701 | ||
702 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
703 | ERR("Failed to set event rule tracepoint loglevel."); | |
704 | } | |
705 | ||
706 | /* Skip to payload. */ | |
707 | offset += current_buffer_view.size; | |
708 | ||
709 | /* Map the pattern. */ | |
710 | current_buffer_view = lttng_buffer_view_from_view( | |
711 | &view->buffer, offset, tracepoint_comm->pattern_len); | |
3e6e0df2 JG |
712 | |
713 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
6d420eff JR |
714 | ret = -1; |
715 | goto end; | |
716 | } | |
717 | ||
3e6e0df2 | 718 | pattern = current_buffer_view.data; |
6d420eff JR |
719 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, |
720 | tracepoint_comm->pattern_len)) { | |
721 | ret = -1; | |
722 | goto end; | |
723 | } | |
724 | ||
725 | /* Skip after the pattern. */ | |
726 | offset += tracepoint_comm->pattern_len; | |
727 | ||
728 | if (!tracepoint_comm->filter_expression_len) { | |
729 | goto skip_filter_expression; | |
730 | } | |
731 | ||
732 | /* Map the filter_expression. */ | |
733 | current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, | |
734 | tracepoint_comm->filter_expression_len); | |
3e6e0df2 | 735 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
6d420eff JR |
736 | ret = -1; |
737 | goto end; | |
738 | } | |
739 | ||
3e6e0df2 | 740 | filter_expression = current_buffer_view.data; |
6d420eff JR |
741 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, |
742 | filter_expression, | |
743 | tracepoint_comm->filter_expression_len)) { | |
744 | ret = -1; | |
745 | goto end; | |
746 | } | |
747 | ||
748 | /* Skip after the pattern. */ | |
749 | offset += tracepoint_comm->filter_expression_len; | |
750 | ||
751 | skip_filter_expression: | |
752 | for (i = 0; i < tracepoint_comm->exclusions_count; i++) { | |
753 | current_buffer_view = lttng_buffer_view_from_view( | |
754 | &view->buffer, offset, sizeof(*exclusion_len)); | |
3e6e0df2 | 755 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
6d420eff JR |
756 | ret = -1; |
757 | goto end; | |
758 | } | |
759 | ||
3e6e0df2 | 760 | exclusion_len = (typeof(exclusion_len)) current_buffer_view.data; |
6d420eff | 761 | offset += sizeof(*exclusion_len); |
3e6e0df2 | 762 | |
6d420eff JR |
763 | current_buffer_view = lttng_buffer_view_from_view( |
764 | &view->buffer, offset, *exclusion_len); | |
3e6e0df2 JG |
765 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
766 | ret = -1; | |
767 | goto end; | |
768 | } | |
769 | ||
6d420eff JR |
770 | exclusion = current_buffer_view.data; |
771 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, | |
772 | exclusion, *exclusion_len)) { | |
773 | ret = -1; | |
774 | goto end; | |
775 | } | |
776 | ||
777 | status = lttng_event_rule_tracepoint_add_exclusion(rule, exclusion); | |
778 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
779 | ERR("Failed to add event rule tracepoint exclusion \"%s\".", | |
780 | exclusion); | |
781 | ret = -1; | |
782 | goto end; | |
783 | } | |
784 | ||
785 | /* Skip to next exclusion. */ | |
786 | offset += *exclusion_len; | |
787 | } | |
788 | ||
789 | status = lttng_event_rule_tracepoint_set_pattern(rule, pattern); | |
790 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
791 | ERR("Failed to set event rule tracepoint pattern."); | |
792 | ret = -1; | |
793 | goto end; | |
794 | } | |
795 | ||
796 | if (filter_expression) { | |
797 | status = lttng_event_rule_tracepoint_set_filter( | |
798 | rule, filter_expression); | |
799 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
800 | ERR("Failed to set event rule tracepoint pattern."); | |
801 | ret = -1; | |
802 | goto end; | |
803 | } | |
804 | } | |
805 | ||
806 | *_event_rule = rule; | |
807 | rule = NULL; | |
808 | ret = offset; | |
809 | end: | |
810 | free(exclusions); | |
811 | lttng_event_rule_destroy(rule); | |
812 | return ret; | |
813 | } | |
814 | ||
815 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_pattern( | |
816 | struct lttng_event_rule *rule, const char *pattern) | |
817 | { | |
818 | char *pattern_copy = NULL; | |
819 | struct lttng_event_rule_tracepoint *tracepoint; | |
820 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
821 | ||
822 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern || | |
823 | strlen(pattern) == 0) { | |
824 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
825 | goto end; | |
826 | } | |
827 | ||
828 | tracepoint = container_of( | |
829 | rule, struct lttng_event_rule_tracepoint, parent); | |
830 | pattern_copy = strdup(pattern); | |
831 | if (!pattern_copy) { | |
832 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
833 | goto end; | |
834 | } | |
835 | ||
836 | free(tracepoint->pattern); | |
837 | ||
838 | tracepoint->pattern = pattern_copy; | |
839 | pattern_copy = NULL; | |
840 | end: | |
841 | return status; | |
842 | } | |
843 | ||
844 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_pattern( | |
845 | const struct lttng_event_rule *rule, const char **pattern) | |
846 | { | |
847 | struct lttng_event_rule_tracepoint *tracepoint; | |
848 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
849 | ||
850 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern) { | |
851 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
852 | goto end; | |
853 | } | |
854 | ||
855 | tracepoint = container_of( | |
856 | rule, struct lttng_event_rule_tracepoint, parent); | |
857 | if (!tracepoint->pattern) { | |
858 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
859 | goto end; | |
860 | } | |
861 | ||
862 | *pattern = tracepoint->pattern; | |
863 | end: | |
864 | return status; | |
865 | } | |
866 | ||
867 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_domain_type( | |
868 | const struct lttng_event_rule *rule, | |
869 | enum lttng_domain_type *type) | |
870 | { | |
871 | struct lttng_event_rule_tracepoint *tracepoint; | |
872 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
873 | ||
874 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) { | |
875 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
876 | goto end; | |
877 | } | |
878 | ||
879 | tracepoint = container_of( | |
880 | rule, struct lttng_event_rule_tracepoint, parent); | |
881 | *type = tracepoint->domain; | |
882 | end: | |
883 | return status; | |
884 | } | |
885 | ||
886 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_filter( | |
887 | struct lttng_event_rule *rule, const char *expression) | |
888 | { | |
889 | char *expression_copy = NULL; | |
890 | struct lttng_event_rule_tracepoint *tracepoint; | |
891 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
892 | ||
893 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression || | |
894 | strlen(expression) == 0) { | |
895 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
896 | goto end; | |
897 | } | |
898 | ||
899 | tracepoint = container_of( | |
900 | rule, struct lttng_event_rule_tracepoint, parent); | |
901 | expression_copy = strdup(expression); | |
902 | if (!expression_copy) { | |
903 | PERROR("Failed to copy filter expression"); | |
904 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
905 | goto end; | |
906 | } | |
907 | ||
908 | if (tracepoint->filter_expression) { | |
909 | free(tracepoint->filter_expression); | |
910 | } | |
911 | ||
912 | tracepoint->filter_expression = expression_copy; | |
913 | expression_copy = NULL; | |
914 | end: | |
915 | return status; | |
916 | } | |
917 | ||
918 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_filter( | |
919 | const struct lttng_event_rule *rule, const char **expression) | |
920 | { | |
921 | struct lttng_event_rule_tracepoint *tracepoint; | |
922 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
923 | ||
924 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression) { | |
925 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
926 | goto end; | |
927 | } | |
928 | ||
929 | tracepoint = container_of( | |
930 | rule, struct lttng_event_rule_tracepoint, parent); | |
931 | if (!tracepoint->filter_expression) { | |
932 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
933 | goto end; | |
934 | } | |
935 | ||
936 | *expression = tracepoint->filter_expression; | |
937 | end: | |
938 | return status; | |
939 | } | |
940 | ||
941 | static bool log_level_value_valid( | |
942 | int level, enum lttng_domain_type domain) | |
943 | { | |
944 | bool valid = false; | |
945 | ||
946 | switch (domain) { | |
947 | case LTTNG_DOMAIN_KERNEL: | |
948 | case LTTNG_DOMAIN_UST: | |
949 | if (level < LTTNG_LOGLEVEL_EMERG) { | |
950 | /* Invalid. */ | |
951 | goto end; | |
952 | } | |
953 | if (level > LTTNG_LOGLEVEL_DEBUG) { | |
954 | /* Invalid. */ | |
955 | goto end; | |
956 | } | |
957 | ||
958 | valid = true; | |
959 | break; | |
960 | case LTTNG_DOMAIN_JUL: | |
961 | case LTTNG_DOMAIN_LOG4J: | |
962 | case LTTNG_DOMAIN_PYTHON: | |
963 | /* | |
964 | * For both JUL and LOG4J custom log level are possible and can | |
965 | * spawn the entire int32 range. | |
966 | * For python, custom log level are possible, it is not clear if | |
967 | * negative value are accepted (NOTSET == 0) but the source code | |
968 | * validate against the int type implying that negative values | |
969 | * are accepted. | |
970 | */ | |
971 | valid = true; | |
972 | goto end; | |
973 | ||
974 | case LTTNG_DOMAIN_NONE: | |
975 | default: | |
976 | abort(); | |
977 | } | |
978 | ||
979 | end: | |
980 | return valid; | |
981 | } | |
982 | ||
983 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level( | |
984 | struct lttng_event_rule *rule, int level) | |
985 | { | |
986 | struct lttng_event_rule_tracepoint *tracepoint; | |
987 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
988 | ||
989 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
990 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
991 | goto end; | |
992 | } | |
993 | ||
994 | tracepoint = container_of( | |
995 | rule, struct lttng_event_rule_tracepoint, parent); | |
996 | ||
997 | if (!log_level_value_valid(level, tracepoint->domain)) { | |
998 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
999 | goto end; | |
1000 | } | |
1001 | ||
1002 | tracepoint->loglevel.value = level; | |
1003 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
1004 | end: | |
1005 | return status; | |
1006 | } | |
1007 | ||
1008 | enum lttng_event_rule_status | |
1009 | lttng_event_rule_tracepoint_set_log_level_range_lower_bound( | |
1010 | struct lttng_event_rule *rule, int level) | |
1011 | { | |
1012 | struct lttng_event_rule_tracepoint *tracepoint; | |
1013 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1014 | ||
1015 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
1016 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1017 | goto end; | |
1018 | } | |
1019 | ||
1020 | tracepoint = container_of( | |
1021 | rule, struct lttng_event_rule_tracepoint, parent); | |
1022 | ||
1023 | if (!log_level_value_valid(level, tracepoint->domain)) { | |
1024 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1025 | goto end; | |
1026 | } | |
1027 | ||
1028 | tracepoint->loglevel.value = level; | |
1029 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
1030 | end: | |
1031 | return status; | |
1032 | } | |
1033 | ||
1034 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level_all( | |
1035 | struct lttng_event_rule *rule) | |
1036 | { | |
1037 | struct lttng_event_rule_tracepoint *tracepoint; | |
1038 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1039 | ||
1040 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
1041 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1042 | goto end; | |
1043 | } | |
1044 | ||
1045 | tracepoint = container_of( | |
1046 | rule, struct lttng_event_rule_tracepoint, parent); | |
1047 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL; | |
1048 | end: | |
1049 | return status; | |
1050 | } | |
1051 | ||
1052 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level_type( | |
1053 | const struct lttng_event_rule *rule, | |
1054 | enum lttng_loglevel_type *type) | |
1055 | { | |
1056 | struct lttng_event_rule_tracepoint *tracepoint; | |
1057 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1058 | ||
1059 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) { | |
1060 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1061 | goto end; | |
1062 | } | |
1063 | ||
1064 | tracepoint = container_of( | |
1065 | rule, struct lttng_event_rule_tracepoint, parent); | |
1066 | *type = tracepoint->loglevel.type; | |
1067 | end: | |
1068 | return status; | |
1069 | } | |
1070 | ||
1071 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level( | |
1072 | const struct lttng_event_rule *rule, int *level) | |
1073 | { | |
1074 | struct lttng_event_rule_tracepoint *tracepoint; | |
1075 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1076 | ||
1077 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !level) { | |
1078 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1079 | goto end; | |
1080 | } | |
1081 | ||
1082 | tracepoint = container_of( | |
1083 | rule, struct lttng_event_rule_tracepoint, parent); | |
1084 | if (tracepoint->loglevel.type == LTTNG_EVENT_LOGLEVEL_ALL) { | |
1085 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
1086 | goto end; | |
1087 | } | |
1088 | ||
1089 | *level = tracepoint->loglevel.value; | |
1090 | end: | |
1091 | return status; | |
1092 | } | |
1093 | ||
1094 | enum lttng_event_rule_status lttng_event_rule_tracepoint_add_exclusion( | |
1095 | struct lttng_event_rule *rule, | |
1096 | const char *exclusion) | |
1097 | { | |
1098 | int ret; | |
1099 | char *exclusion_copy = NULL; | |
1100 | struct lttng_event_rule_tracepoint *tracepoint; | |
1101 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1102 | enum lttng_domain_type domain_type; | |
1103 | ||
1104 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || | |
1105 | !exclusion) { | |
1106 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1107 | goto end; | |
1108 | } | |
1109 | ||
1110 | tracepoint = container_of( | |
1111 | rule, struct lttng_event_rule_tracepoint, parent); | |
1112 | ||
1113 | status = lttng_event_rule_tracepoint_get_domain_type( | |
1114 | rule, &domain_type); | |
1115 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
1116 | goto end; | |
1117 | } | |
1118 | ||
1119 | switch (domain_type) { | |
1120 | case LTTNG_DOMAIN_KERNEL: | |
1121 | case LTTNG_DOMAIN_JUL: | |
1122 | case LTTNG_DOMAIN_LOG4J: | |
1123 | case LTTNG_DOMAIN_PYTHON: | |
1124 | status = LTTNG_EVENT_RULE_STATUS_UNSUPPORTED; | |
1125 | goto end; | |
1126 | case LTTNG_DOMAIN_UST: | |
1127 | /* Exclusions supported. */ | |
1128 | break; | |
1129 | default: | |
1130 | abort(); | |
1131 | } | |
1132 | ||
1133 | if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) { | |
1134 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1135 | goto end; | |
1136 | } | |
1137 | ||
1138 | exclusion_copy = strdup(exclusion); | |
1139 | if (!exclusion_copy) { | |
1140 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1141 | goto end; | |
1142 | } | |
1143 | ||
1144 | ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions, | |
1145 | exclusion_copy); | |
1146 | if (ret < 0) { | |
1147 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1148 | goto end; | |
1149 | } | |
1150 | ||
1151 | exclusion_copy = NULL; | |
1152 | end: | |
1153 | free(exclusion_copy); | |
1154 | return status; | |
1155 | } | |
1156 | ||
1157 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusions_count( | |
1158 | const struct lttng_event_rule *rule, unsigned int *count) | |
1159 | { | |
1160 | struct lttng_event_rule_tracepoint *tracepoint; | |
1161 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1162 | ||
1163 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !count) { | |
1164 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1165 | goto end; | |
1166 | } | |
1167 | ||
1168 | tracepoint = container_of( | |
1169 | rule, struct lttng_event_rule_tracepoint, parent); | |
1170 | *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions); | |
1171 | end: | |
1172 | return status; | |
1173 | } | |
1174 | ||
1175 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusion_at_index( | |
1176 | const struct lttng_event_rule *rule, | |
1177 | unsigned int index, | |
1178 | const char **exclusion) | |
1179 | { | |
1180 | unsigned int count; | |
1181 | struct lttng_event_rule_tracepoint *tracepoint; | |
1182 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1183 | ||
1184 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { | |
1185 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1186 | goto end; | |
1187 | } | |
1188 | ||
1189 | tracepoint = container_of( | |
1190 | rule, struct lttng_event_rule_tracepoint, parent); | |
1191 | if (lttng_event_rule_tracepoint_get_exclusions_count(rule, &count) != | |
1192 | LTTNG_EVENT_RULE_STATUS_OK) { | |
1193 | goto end; | |
1194 | } | |
1195 | ||
1196 | if (index >= count) { | |
1197 | goto end; | |
1198 | } | |
1199 | ||
1200 | *exclusion = lttng_dynamic_pointer_array_get_pointer( | |
1201 | &tracepoint->exclusions, index); | |
1202 | end: | |
1203 | return status; | |
1204 | } |