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0a23a07d 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 | ||
c9e313bc SM |
8 | #include <common/credentials.hpp> |
9 | #include <common/error.hpp> | |
10 | #include <common/hashtable/hashtable.hpp> | |
11 | #include <common/hashtable/utils.hpp> | |
12 | #include <common/macros.hpp> | |
13 | #include <common/mi-lttng.hpp> | |
14 | #include <common/optional.hpp> | |
15 | #include <common/payload-view.hpp> | |
16 | #include <common/payload.hpp> | |
17 | #include <common/runas.hpp> | |
18 | #include <common/string-utils/string-utils.hpp> | |
19 | #include <lttng/event-rule/event-rule-internal.hpp> | |
20 | #include <lttng/event-rule/user-tracepoint-internal.hpp> | |
0a23a07d | 21 | #include <lttng/event.h> |
6a751b95 | 22 | #include <lttng/log-level-rule.h> |
0a23a07d JR |
23 | |
24 | #define IS_USER_TRACEPOINT_EVENT_RULE(rule) \ | |
25 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT) | |
26 | ||
27 | static void lttng_event_rule_user_tracepoint_destroy(struct lttng_event_rule *rule) | |
28 | { | |
29 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
30 | ||
31 | if (rule == NULL) { | |
32 | return; | |
33 | } | |
34 | ||
0114db0e JG |
35 | tracepoint = lttng::utils::container_of( |
36 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
37 | |
38 | lttng_log_level_rule_destroy(tracepoint->log_level_rule); | |
39 | lttng_dynamic_pointer_array_reset(&tracepoint->exclusions); | |
40 | free(tracepoint->pattern); | |
41 | free(tracepoint->filter_expression); | |
42 | free(tracepoint->internal_filter.filter); | |
43 | free(tracepoint->internal_filter.bytecode); | |
44 | free(tracepoint); | |
45 | } | |
46 | ||
47 | static bool lttng_event_rule_user_tracepoint_validate( | |
48 | const struct lttng_event_rule *rule) | |
49 | { | |
50 | bool valid = false; | |
51 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
52 | ||
53 | if (!rule) { | |
54 | goto end; | |
55 | } | |
56 | ||
0114db0e JG |
57 | tracepoint = lttng::utils::container_of( |
58 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
59 | |
60 | /* Required field. */ | |
61 | if (!tracepoint->pattern) { | |
62 | ERR("Invalid user tracepoint event rule: a pattern must be set."); | |
63 | goto end; | |
64 | } | |
65 | ||
66 | valid = true; | |
67 | end: | |
68 | return valid; | |
69 | } | |
70 | ||
71 | static int lttng_event_rule_user_tracepoint_serialize( | |
72 | const struct lttng_event_rule *rule, | |
73 | struct lttng_payload *payload) | |
74 | { | |
75 | int ret, i; | |
76 | size_t pattern_len, filter_expression_len, exclusions_len, header_offset; | |
77 | size_t size_before_log_level_rule; | |
78 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
79 | struct lttng_event_rule_user_tracepoint_comm tracepoint_comm; | |
80 | enum lttng_event_rule_status status; | |
81 | unsigned int exclusion_count; | |
82 | size_t exclusions_appended_len = 0; | |
83 | struct lttng_event_rule_user_tracepoint_comm *header; | |
84 | ||
85 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule)) { | |
86 | ret = -1; | |
87 | goto end; | |
88 | } | |
89 | ||
90 | header_offset = payload->buffer.size; | |
91 | ||
92 | DBG("Serializing user tracepoint event rule."); | |
0114db0e JG |
93 | tracepoint = lttng::utils::container_of( |
94 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
95 | |
96 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(rule, &exclusion_count); | |
a0377dfe | 97 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
98 | |
99 | pattern_len = strlen(tracepoint->pattern) + 1; | |
100 | ||
101 | if (tracepoint->filter_expression != NULL) { | |
102 | filter_expression_len = | |
103 | strlen(tracepoint->filter_expression) + 1; | |
104 | } else { | |
105 | filter_expression_len = 0; | |
106 | } | |
107 | ||
108 | exclusions_len = 0; | |
109 | for (i = 0; i < exclusion_count; i++) { | |
110 | const char *exclusion; | |
111 | ||
112 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
113 | rule, i, &exclusion); | |
a0377dfe | 114 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
115 | |
116 | /* Length field. */ | |
117 | exclusions_len += sizeof(uint32_t); | |
118 | /* Payload (null terminated). */ | |
119 | exclusions_len += strlen(exclusion) + 1; | |
120 | } | |
121 | ||
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 | size_before_log_level_rule = payload->buffer.size; | |
146 | ||
147 | ret = lttng_log_level_rule_serialize(tracepoint->log_level_rule, payload); | |
148 | if (ret < 0) { | |
149 | goto end; | |
150 | } | |
151 | ||
152 | header = (typeof(header)) ((char *) payload->buffer.data + header_offset); | |
153 | header->log_level_rule_len = | |
154 | payload->buffer.size - size_before_log_level_rule; | |
155 | ||
156 | for (i = 0; i < exclusion_count; i++) { | |
157 | size_t len; | |
158 | const char *exclusion; | |
159 | ||
160 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
161 | rule, i, &exclusion); | |
a0377dfe | 162 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
163 | |
164 | len = strlen(exclusion) + 1; | |
165 | /* Append exclusion length, includes the null terminator. */ | |
166 | ret = lttng_dynamic_buffer_append( | |
167 | &payload->buffer, &len, sizeof(uint32_t)); | |
168 | if (ret) { | |
169 | goto end; | |
170 | } | |
171 | ||
172 | exclusions_appended_len += sizeof(uint32_t); | |
173 | ||
174 | /* Include the '\0' in the payload. */ | |
175 | ret = lttng_dynamic_buffer_append( | |
176 | &payload->buffer, exclusion, len); | |
177 | if (ret) { | |
178 | goto end; | |
179 | } | |
180 | ||
181 | exclusions_appended_len += len; | |
182 | } | |
183 | ||
a0377dfe | 184 | LTTNG_ASSERT(exclusions_len == exclusions_appended_len); |
0a23a07d JR |
185 | |
186 | end: | |
187 | return ret; | |
188 | } | |
189 | ||
190 | static bool lttng_event_rule_user_tracepoint_is_equal( | |
191 | const struct lttng_event_rule *_a, | |
192 | const struct lttng_event_rule *_b) | |
193 | { | |
194 | int i; | |
195 | bool is_equal = false; | |
196 | struct lttng_event_rule_user_tracepoint *a, *b; | |
197 | unsigned int count_a, count_b; | |
198 | enum lttng_event_rule_status status; | |
199 | ||
0114db0e JG |
200 | a = lttng::utils::container_of(_a, <tng_event_rule_user_tracepoint::parent); |
201 | b = lttng::utils::container_of(_b, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
202 | |
203 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(_a, &count_a); | |
a0377dfe | 204 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d | 205 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(_b, &count_b); |
a0377dfe | 206 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
207 | |
208 | /* Quick checks. */ | |
209 | if (count_a != count_b) { | |
210 | goto end; | |
211 | } | |
212 | ||
213 | if (!!a->filter_expression != !!b->filter_expression) { | |
214 | goto end; | |
215 | } | |
216 | ||
217 | /* Long check. */ | |
a0377dfe FD |
218 | LTTNG_ASSERT(a->pattern); |
219 | LTTNG_ASSERT(b->pattern); | |
0a23a07d JR |
220 | if (strcmp(a->pattern, b->pattern)) { |
221 | goto end; | |
222 | } | |
223 | ||
224 | if (a->filter_expression && b->filter_expression) { | |
225 | if (strcmp(a->filter_expression, b->filter_expression)) { | |
226 | goto end; | |
227 | } | |
228 | } else if (!!a->filter_expression != !!b->filter_expression) { | |
229 | /* One is set; not the other. */ | |
230 | goto end; | |
231 | } | |
232 | ||
233 | if (!lttng_log_level_rule_is_equal( | |
234 | a->log_level_rule, b->log_level_rule)) { | |
235 | goto end; | |
236 | } | |
237 | ||
238 | for (i = 0; i < count_a; i++) { | |
239 | const char *exclusion_a, *exclusion_b; | |
240 | ||
241 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
242 | _a, i, &exclusion_a); | |
a0377dfe | 243 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
244 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( |
245 | _b, i, &exclusion_b); | |
a0377dfe | 246 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
247 | if (strcmp(exclusion_a, exclusion_b)) { |
248 | goto end; | |
249 | } | |
250 | } | |
251 | ||
252 | is_equal = true; | |
253 | end: | |
254 | return is_equal; | |
255 | } | |
256 | ||
257 | static enum lttng_error_code | |
258 | lttng_event_rule_user_tracepoint_generate_filter_bytecode( | |
259 | struct lttng_event_rule *rule, | |
260 | const struct lttng_credentials *creds) | |
261 | { | |
262 | int ret; | |
263 | enum lttng_error_code ret_code; | |
264 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
265 | enum lttng_event_rule_status status; | |
266 | const char *filter; | |
267 | struct lttng_bytecode *bytecode = NULL; | |
268 | ||
a0377dfe | 269 | LTTNG_ASSERT(rule); |
0a23a07d | 270 | |
0114db0e JG |
271 | tracepoint = lttng::utils::container_of( |
272 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
273 | |
274 | status = lttng_event_rule_user_tracepoint_get_filter(rule, &filter); | |
275 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
276 | filter = NULL; | |
277 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
278 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
279 | goto end; | |
280 | } | |
281 | ||
282 | if (filter && filter[0] == '\0') { | |
283 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
284 | goto error; | |
285 | } | |
286 | ||
287 | if (filter) { | |
288 | tracepoint->internal_filter.filter = strdup(filter); | |
289 | if (tracepoint->internal_filter.filter == NULL) { | |
290 | ret_code = LTTNG_ERR_NOMEM; | |
291 | goto error; | |
292 | } | |
293 | } else { | |
294 | tracepoint->internal_filter.filter = NULL; | |
295 | } | |
296 | ||
297 | if (tracepoint->internal_filter.filter == NULL) { | |
298 | ret_code = LTTNG_OK; | |
299 | goto end; | |
300 | } | |
301 | ||
302 | ret = run_as_generate_filter_bytecode( | |
303 | tracepoint->internal_filter.filter, creds, | |
304 | &bytecode); | |
305 | if (ret) { | |
306 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
307 | goto end; | |
308 | } | |
309 | ||
310 | tracepoint->internal_filter.bytecode = bytecode; | |
311 | bytecode = NULL; | |
312 | ret_code = LTTNG_OK; | |
313 | ||
314 | error: | |
315 | end: | |
316 | free(bytecode); | |
317 | return ret_code; | |
318 | } | |
319 | ||
320 | static const char *lttng_event_rule_user_tracepoint_get_internal_filter( | |
321 | const struct lttng_event_rule *rule) | |
322 | { | |
323 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
324 | ||
a0377dfe | 325 | LTTNG_ASSERT(rule); |
0114db0e JG |
326 | tracepoint = lttng::utils::container_of( |
327 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
328 | return tracepoint->internal_filter.filter; |
329 | } | |
330 | ||
331 | static const struct lttng_bytecode * | |
332 | lttng_event_rule_user_tracepoint_get_internal_filter_bytecode( | |
333 | const struct lttng_event_rule *rule) | |
334 | { | |
335 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
336 | ||
a0377dfe | 337 | LTTNG_ASSERT(rule); |
0114db0e JG |
338 | tracepoint = lttng::utils::container_of( |
339 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
340 | return tracepoint->internal_filter.bytecode; |
341 | } | |
342 | ||
343 | static enum lttng_event_rule_generate_exclusions_status | |
344 | lttng_event_rule_user_tracepoint_generate_exclusions( | |
345 | const struct lttng_event_rule *rule, | |
346 | struct lttng_event_exclusion **_exclusions) | |
347 | { | |
348 | unsigned int nb_exclusions = 0, i; | |
349 | struct lttng_event_exclusion *exclusions; | |
350 | enum lttng_event_rule_status event_rule_status; | |
351 | enum lttng_event_rule_generate_exclusions_status ret_status; | |
352 | ||
a0377dfe | 353 | LTTNG_ASSERT(_exclusions); |
0a23a07d JR |
354 | |
355 | event_rule_status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( | |
356 | rule, &nb_exclusions); | |
a0377dfe | 357 | LTTNG_ASSERT(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
358 | if (nb_exclusions == 0) { |
359 | /* Nothing to do. */ | |
360 | exclusions = NULL; | |
361 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; | |
362 | goto end; | |
363 | } | |
364 | ||
64803277 | 365 | exclusions = zmalloc<lttng_event_exclusion>(sizeof(struct lttng_event_exclusion) + (LTTNG_SYMBOL_NAME_LEN * nb_exclusions)); |
0a23a07d JR |
366 | if (!exclusions) { |
367 | PERROR("Failed to allocate exclusions buffer"); | |
368 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OUT_OF_MEMORY; | |
369 | goto end; | |
370 | } | |
371 | ||
372 | exclusions->count = nb_exclusions; | |
373 | for (i = 0; i < nb_exclusions; i++) { | |
374 | int copy_ret; | |
375 | const char *exclusion_str; | |
376 | ||
377 | event_rule_status = | |
378 | lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
379 | rule, i, &exclusion_str); | |
a0377dfe | 380 | LTTNG_ASSERT(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d | 381 | |
73b3df71 JG |
382 | copy_ret = lttng_strncpy( |
383 | LTTNG_EVENT_EXCLUSION_NAME_AT(exclusions, i), | |
384 | exclusion_str, | |
385 | sizeof(LTTNG_EVENT_EXCLUSION_NAME_AT(exclusions, i))); | |
0a23a07d JR |
386 | if (copy_ret) { |
387 | free(exclusions); | |
388 | exclusions = NULL; | |
389 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_ERROR; | |
390 | goto end; | |
391 | } | |
392 | } | |
393 | ||
394 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OK; | |
395 | ||
396 | end: | |
397 | *_exclusions = exclusions; | |
398 | return ret_status; | |
399 | } | |
400 | ||
401 | static void destroy_lttng_exclusions_element(void *ptr) | |
402 | { | |
403 | free(ptr); | |
404 | } | |
405 | ||
406 | static unsigned long lttng_event_rule_user_tracepoint_hash( | |
407 | const struct lttng_event_rule *rule) | |
408 | { | |
409 | unsigned long hash; | |
410 | unsigned int i, exclusion_count; | |
411 | enum lttng_event_rule_status status; | |
412 | struct lttng_event_rule_user_tracepoint *tp_rule = | |
0114db0e | 413 | lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
414 | |
415 | hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT, | |
416 | lttng_ht_seed); | |
417 | hash ^= hash_key_str(tp_rule->pattern, lttng_ht_seed); | |
418 | ||
419 | if (tp_rule->filter_expression) { | |
420 | hash ^= hash_key_str(tp_rule->filter_expression, lttng_ht_seed); | |
421 | } | |
422 | ||
423 | if (tp_rule->log_level_rule) { | |
424 | hash ^= lttng_log_level_rule_hash(tp_rule->log_level_rule); | |
425 | } | |
426 | ||
427 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(rule, | |
428 | &exclusion_count); | |
a0377dfe | 429 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
430 | |
431 | for (i = 0; i < exclusion_count; i++) { | |
432 | const char *exclusion; | |
433 | ||
434 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
435 | rule, i, &exclusion); | |
a0377dfe | 436 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
437 | hash ^= hash_key_str(exclusion, lttng_ht_seed); |
438 | } | |
439 | ||
440 | return hash; | |
441 | } | |
442 | ||
6a751b95 JR |
443 | static enum lttng_error_code lttng_event_rule_user_tracepoint_mi_serialize( |
444 | const struct lttng_event_rule *rule, struct mi_writer *writer) | |
445 | { | |
446 | int ret; | |
447 | enum lttng_error_code ret_code; | |
448 | enum lttng_event_rule_status status; | |
449 | const char *filter = NULL; | |
450 | const char *name_pattern = NULL; | |
451 | const struct lttng_log_level_rule *log_level_rule = NULL; | |
452 | unsigned int exclusion_count = 0; | |
453 | ||
a0377dfe FD |
454 | LTTNG_ASSERT(rule); |
455 | LTTNG_ASSERT(writer); | |
456 | LTTNG_ASSERT(IS_USER_TRACEPOINT_EVENT_RULE(rule)); | |
6a751b95 JR |
457 | |
458 | status = lttng_event_rule_user_tracepoint_get_name_pattern( | |
459 | rule, &name_pattern); | |
a0377dfe FD |
460 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
461 | LTTNG_ASSERT(name_pattern); | |
6a751b95 JR |
462 | |
463 | status = lttng_event_rule_user_tracepoint_get_filter(rule, &filter); | |
a0377dfe | 464 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK || |
6a751b95 JR |
465 | status == LTTNG_EVENT_RULE_STATUS_UNSET); |
466 | ||
467 | status = lttng_event_rule_user_tracepoint_get_log_level_rule( | |
468 | rule, &log_level_rule); | |
a0377dfe | 469 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK || |
6a751b95 JR |
470 | status == LTTNG_EVENT_RULE_STATUS_UNSET); |
471 | ||
472 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( | |
473 | rule, &exclusion_count); | |
a0377dfe | 474 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
6a751b95 JR |
475 | |
476 | /* Open event rule user tracepoint element. */ | |
477 | ret = mi_lttng_writer_open_element( | |
478 | writer, mi_lttng_element_event_rule_user_tracepoint); | |
479 | if (ret) { | |
480 | goto mi_error; | |
481 | } | |
482 | ||
483 | /* Name pattern. */ | |
484 | ret = mi_lttng_writer_write_element_string(writer, | |
485 | mi_lttng_element_event_rule_name_pattern, name_pattern); | |
486 | if (ret) { | |
487 | goto mi_error; | |
488 | } | |
489 | ||
490 | /* Filter expression. */ | |
491 | if (filter != NULL) { | |
492 | ret = mi_lttng_writer_write_element_string(writer, | |
493 | mi_lttng_element_event_rule_filter_expression, | |
494 | filter); | |
495 | if (ret) { | |
496 | goto mi_error; | |
497 | } | |
498 | } | |
499 | ||
500 | /* Log level rule. */ | |
501 | if (log_level_rule) { | |
502 | ret_code = lttng_log_level_rule_mi_serialize( | |
503 | log_level_rule, writer); | |
504 | if (ret_code != LTTNG_OK) { | |
505 | goto end; | |
506 | } | |
507 | } | |
508 | ||
509 | if (exclusion_count != 0) { | |
510 | int i; | |
511 | ||
512 | /* Open the exclusion list. */ | |
513 | ret = mi_lttng_writer_open_element(writer, | |
514 | mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusions); | |
515 | if (ret) { | |
516 | goto mi_error; | |
517 | } | |
518 | ||
519 | for (i = 0; i < exclusion_count; i++) { | |
520 | const char *exclusion; | |
521 | ||
522 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
523 | rule, i, &exclusion); | |
a0377dfe | 524 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
6a751b95 JR |
525 | |
526 | ret = mi_lttng_writer_write_element_string(writer, | |
527 | mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusion, | |
528 | exclusion); | |
529 | if (ret) { | |
530 | goto mi_error; | |
531 | } | |
532 | } | |
533 | ||
534 | /* Close the list. */ | |
535 | ret = mi_lttng_writer_close_element(writer); | |
536 | if (ret) { | |
537 | goto mi_error; | |
538 | } | |
539 | } | |
540 | ||
541 | /* Close event rule user tracepoint element. */ | |
542 | ret = mi_lttng_writer_close_element(writer); | |
543 | if (ret) { | |
544 | goto mi_error; | |
545 | } | |
546 | ||
547 | ret_code = LTTNG_OK; | |
548 | goto end; | |
549 | ||
550 | mi_error: | |
551 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
552 | end: | |
553 | return ret_code; | |
554 | } | |
555 | ||
0a23a07d JR |
556 | struct lttng_event_rule *lttng_event_rule_user_tracepoint_create(void) |
557 | { | |
558 | struct lttng_event_rule *rule = NULL; | |
559 | struct lttng_event_rule_user_tracepoint *tp_rule; | |
560 | enum lttng_event_rule_status status; | |
561 | ||
64803277 | 562 | tp_rule = zmalloc<lttng_event_rule_user_tracepoint>(); |
0a23a07d JR |
563 | if (!tp_rule) { |
564 | goto end; | |
565 | } | |
566 | ||
567 | rule = &tp_rule->parent; | |
568 | lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT); | |
569 | tp_rule->parent.validate = lttng_event_rule_user_tracepoint_validate; | |
570 | tp_rule->parent.serialize = lttng_event_rule_user_tracepoint_serialize; | |
571 | tp_rule->parent.equal = lttng_event_rule_user_tracepoint_is_equal; | |
572 | tp_rule->parent.destroy = lttng_event_rule_user_tracepoint_destroy; | |
573 | tp_rule->parent.generate_filter_bytecode = | |
574 | lttng_event_rule_user_tracepoint_generate_filter_bytecode; | |
575 | tp_rule->parent.get_filter = | |
576 | lttng_event_rule_user_tracepoint_get_internal_filter; | |
577 | tp_rule->parent.get_filter_bytecode = | |
578 | lttng_event_rule_user_tracepoint_get_internal_filter_bytecode; | |
579 | tp_rule->parent.generate_exclusions = | |
580 | lttng_event_rule_user_tracepoint_generate_exclusions; | |
581 | tp_rule->parent.hash = lttng_event_rule_user_tracepoint_hash; | |
6a751b95 | 582 | tp_rule->parent.mi_serialize = lttng_event_rule_user_tracepoint_mi_serialize; |
0a23a07d JR |
583 | |
584 | /* Not necessary for now. */ | |
585 | tp_rule->parent.generate_lttng_event = NULL; | |
586 | ||
587 | tp_rule->log_level_rule = NULL; | |
588 | ||
589 | lttng_dynamic_pointer_array_init(&tp_rule->exclusions, | |
590 | destroy_lttng_exclusions_element); | |
591 | ||
592 | /* Default pattern is '*'. */ | |
593 | status = lttng_event_rule_user_tracepoint_set_name_pattern(rule, "*"); | |
594 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
595 | lttng_event_rule_destroy(rule); | |
596 | rule = NULL; | |
597 | } | |
598 | ||
599 | end: | |
600 | return rule; | |
601 | } | |
602 | ||
0a23a07d JR |
603 | ssize_t lttng_event_rule_user_tracepoint_create_from_payload( |
604 | struct lttng_payload_view *view, | |
605 | struct lttng_event_rule **_event_rule) | |
606 | { | |
607 | ssize_t ret, offset = 0; | |
608 | int i; | |
609 | enum lttng_event_rule_status status; | |
610 | const struct lttng_event_rule_user_tracepoint_comm *tracepoint_comm; | |
611 | const char *pattern; | |
612 | const char *filter_expression = NULL; | |
613 | const char **exclusions = NULL; | |
614 | const uint32_t *exclusion_len; | |
615 | const char *exclusion; | |
616 | struct lttng_buffer_view current_buffer_view; | |
617 | struct lttng_event_rule *rule = NULL; | |
618 | struct lttng_log_level_rule *log_level_rule = NULL; | |
619 | ||
620 | if (!_event_rule) { | |
621 | ret = -1; | |
622 | goto end; | |
623 | } | |
624 | ||
625 | current_buffer_view = lttng_buffer_view_from_view( | |
626 | &view->buffer, offset, sizeof(*tracepoint_comm)); | |
627 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
628 | ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header."); | |
629 | ret = -1; | |
630 | goto end; | |
631 | } | |
632 | ||
633 | tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data; | |
634 | ||
635 | rule = lttng_event_rule_user_tracepoint_create(); | |
636 | if (!rule) { | |
637 | ERR("Failed to create event rule user tracepoint."); | |
638 | ret = -1; | |
639 | goto end; | |
640 | } | |
641 | ||
642 | /* Skip to payload. */ | |
643 | offset += current_buffer_view.size; | |
644 | ||
645 | /* Map the pattern. */ | |
646 | current_buffer_view = lttng_buffer_view_from_view( | |
647 | &view->buffer, offset, tracepoint_comm->pattern_len); | |
648 | ||
649 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
650 | ret = -1; | |
651 | goto end; | |
652 | } | |
653 | ||
654 | pattern = current_buffer_view.data; | |
655 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, | |
656 | tracepoint_comm->pattern_len)) { | |
657 | ret = -1; | |
658 | goto end; | |
659 | } | |
660 | ||
661 | /* Skip after the pattern. */ | |
662 | offset += tracepoint_comm->pattern_len; | |
663 | ||
664 | if (!tracepoint_comm->filter_expression_len) { | |
665 | goto skip_filter_expression; | |
666 | } | |
667 | ||
668 | /* Map the filter_expression. */ | |
669 | current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, | |
670 | tracepoint_comm->filter_expression_len); | |
671 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
672 | ret = -1; | |
673 | goto end; | |
674 | } | |
675 | ||
676 | filter_expression = current_buffer_view.data; | |
677 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, | |
678 | filter_expression, | |
679 | tracepoint_comm->filter_expression_len)) { | |
680 | ret = -1; | |
681 | goto end; | |
682 | } | |
683 | ||
684 | /* Skip after the pattern. */ | |
685 | offset += tracepoint_comm->filter_expression_len; | |
686 | ||
687 | skip_filter_expression: | |
688 | if (!tracepoint_comm->log_level_rule_len) { | |
689 | goto skip_log_level_rule; | |
690 | } | |
691 | ||
692 | { | |
693 | /* Map the log level rule. */ | |
694 | struct lttng_payload_view current_payload_view = | |
695 | lttng_payload_view_from_view(view, offset, | |
696 | tracepoint_comm->log_level_rule_len); | |
697 | ||
698 | ret = lttng_log_level_rule_create_from_payload( | |
699 | ¤t_payload_view, &log_level_rule); | |
700 | if (ret < 0) { | |
701 | ret = -1; | |
702 | goto end; | |
703 | } | |
704 | ||
a0377dfe | 705 | LTTNG_ASSERT(ret == tracepoint_comm->log_level_rule_len); |
0a23a07d JR |
706 | } |
707 | ||
708 | /* Skip after the log level rule. */ | |
709 | offset += tracepoint_comm->log_level_rule_len; | |
710 | ||
711 | skip_log_level_rule: | |
712 | for (i = 0; i < tracepoint_comm->exclusions_count; i++) { | |
713 | current_buffer_view = lttng_buffer_view_from_view( | |
714 | &view->buffer, offset, sizeof(*exclusion_len)); | |
715 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
716 | ret = -1; | |
717 | goto end; | |
718 | } | |
719 | ||
720 | exclusion_len = (typeof(exclusion_len)) current_buffer_view.data; | |
721 | offset += sizeof(*exclusion_len); | |
722 | ||
723 | current_buffer_view = lttng_buffer_view_from_view( | |
724 | &view->buffer, offset, *exclusion_len); | |
725 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
726 | ret = -1; | |
727 | goto end; | |
728 | } | |
729 | ||
730 | exclusion = current_buffer_view.data; | |
731 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, | |
732 | exclusion, *exclusion_len)) { | |
733 | ret = -1; | |
734 | goto end; | |
735 | } | |
736 | ||
737 | status = lttng_event_rule_user_tracepoint_add_name_pattern_exclusion(rule, exclusion); | |
738 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
739 | ERR("Failed to add event rule user tracepoint exclusion \"%s\".", | |
740 | exclusion); | |
741 | ret = -1; | |
742 | goto end; | |
743 | } | |
744 | ||
745 | /* Skip to next exclusion. */ | |
746 | offset += *exclusion_len; | |
747 | } | |
748 | ||
749 | status = lttng_event_rule_user_tracepoint_set_name_pattern(rule, pattern); | |
750 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
751 | ERR("Failed to set event rule user tracepoint pattern."); | |
752 | ret = -1; | |
753 | goto end; | |
754 | } | |
755 | ||
756 | if (filter_expression) { | |
757 | status = lttng_event_rule_user_tracepoint_set_filter( | |
758 | rule, filter_expression); | |
759 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
760 | ERR("Failed to set event rule user tracepoint pattern."); | |
761 | ret = -1; | |
762 | goto end; | |
763 | } | |
764 | } | |
765 | ||
766 | if (log_level_rule) { | |
767 | status = lttng_event_rule_user_tracepoint_set_log_level_rule( | |
768 | rule, log_level_rule); | |
769 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
770 | ERR("Failed to set event rule user tracepoint log level rule."); | |
771 | ret = -1; | |
772 | goto end; | |
773 | } | |
774 | } | |
775 | ||
776 | *_event_rule = rule; | |
777 | rule = NULL; | |
778 | ret = offset; | |
779 | end: | |
780 | free(exclusions); | |
781 | lttng_log_level_rule_destroy(log_level_rule); | |
782 | lttng_event_rule_destroy(rule); | |
783 | return ret; | |
784 | } | |
785 | ||
786 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_set_name_pattern( | |
787 | struct lttng_event_rule *rule, const char *pattern) | |
788 | { | |
789 | char *pattern_copy = NULL; | |
790 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
791 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
792 | ||
793 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !pattern || | |
794 | strlen(pattern) == 0) { | |
795 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
796 | goto end; | |
797 | } | |
798 | ||
0114db0e JG |
799 | tracepoint = lttng::utils::container_of( |
800 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
801 | pattern_copy = strdup(pattern); |
802 | if (!pattern_copy) { | |
803 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
804 | goto end; | |
805 | } | |
806 | ||
807 | /* Normalize the pattern. */ | |
808 | strutils_normalize_star_glob_pattern(pattern_copy); | |
809 | ||
810 | free(tracepoint->pattern); | |
811 | ||
812 | tracepoint->pattern = pattern_copy; | |
813 | pattern_copy = NULL; | |
814 | end: | |
815 | return status; | |
816 | } | |
817 | ||
818 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern( | |
819 | const struct lttng_event_rule *rule, const char **pattern) | |
820 | { | |
821 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
822 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
823 | ||
824 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !pattern) { | |
825 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
826 | goto end; | |
827 | } | |
828 | ||
0114db0e JG |
829 | tracepoint = lttng::utils::container_of( |
830 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
831 | if (!tracepoint->pattern) { |
832 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
833 | goto end; | |
834 | } | |
835 | ||
836 | *pattern = tracepoint->pattern; | |
837 | end: | |
838 | return status; | |
839 | } | |
840 | ||
841 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_set_filter( | |
842 | struct lttng_event_rule *rule, const char *expression) | |
843 | { | |
844 | char *expression_copy = NULL; | |
845 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
846 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
847 | ||
848 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !expression || | |
849 | strlen(expression) == 0) { | |
850 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
851 | goto end; | |
852 | } | |
853 | ||
0114db0e JG |
854 | tracepoint = lttng::utils::container_of( |
855 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
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_user_tracepoint_get_filter( | |
874 | const struct lttng_event_rule *rule, const char **expression) | |
875 | { | |
876 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
877 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
878 | ||
879 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !expression) { | |
880 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
881 | goto end; | |
882 | } | |
883 | ||
0114db0e JG |
884 | tracepoint = lttng::utils::container_of( |
885 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
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_rule_valid(const struct lttng_log_level_rule *rule) | |
897 | { | |
898 | bool valid = false; | |
899 | enum lttng_log_level_rule_status status; | |
900 | int level; | |
901 | ||
902 | switch (lttng_log_level_rule_get_type(rule)) { | |
903 | case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: | |
904 | status = lttng_log_level_rule_exactly_get_level(rule, &level); | |
905 | break; | |
906 | case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: | |
907 | status = lttng_log_level_rule_at_least_as_severe_as_get_level( | |
908 | rule, &level); | |
909 | break; | |
910 | default: | |
911 | abort(); | |
912 | } | |
913 | ||
a0377dfe | 914 | LTTNG_ASSERT(status == LTTNG_LOG_LEVEL_RULE_STATUS_OK); |
0a23a07d JR |
915 | |
916 | if (level < LTTNG_LOGLEVEL_EMERG) { | |
917 | /* Invalid. */ | |
918 | goto end; | |
919 | } | |
920 | if (level > LTTNG_LOGLEVEL_DEBUG) { | |
921 | /* Invalid. */ | |
922 | goto end; | |
923 | } | |
924 | ||
925 | valid = true; | |
926 | ||
927 | end: | |
928 | return valid; | |
929 | } | |
930 | ||
931 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_set_log_level_rule( | |
932 | struct lttng_event_rule *rule, | |
933 | const struct lttng_log_level_rule *log_level_rule) | |
934 | { | |
935 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
936 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
937 | struct lttng_log_level_rule *copy = NULL; | |
938 | ||
939 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule)) { | |
940 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
941 | goto end; | |
942 | } | |
943 | ||
0114db0e JG |
944 | tracepoint = lttng::utils::container_of( |
945 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
946 | |
947 | if (!log_level_rule_valid(log_level_rule)) { | |
948 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
949 | goto end; | |
950 | } | |
951 | ||
952 | copy = lttng_log_level_rule_copy(log_level_rule); | |
953 | if (copy == NULL) { | |
954 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
955 | goto end; | |
956 | } | |
957 | ||
958 | if (tracepoint->log_level_rule) { | |
959 | lttng_log_level_rule_destroy(tracepoint->log_level_rule); | |
960 | } | |
961 | ||
962 | tracepoint->log_level_rule = copy; | |
963 | ||
964 | end: | |
965 | return status; | |
966 | } | |
967 | ||
968 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_log_level_rule( | |
969 | const struct lttng_event_rule *rule, | |
970 | const struct lttng_log_level_rule **log_level_rule | |
971 | ) | |
972 | { | |
973 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
974 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
975 | ||
976 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !log_level_rule) { | |
977 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
978 | goto end; | |
979 | } | |
980 | ||
0114db0e JG |
981 | tracepoint = lttng::utils::container_of( |
982 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
983 | if (tracepoint->log_level_rule == NULL) { |
984 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
985 | goto end; | |
986 | } | |
987 | ||
988 | *log_level_rule = tracepoint->log_level_rule; | |
989 | end: | |
990 | return status; | |
991 | } | |
992 | ||
993 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_add_name_pattern_exclusion( | |
994 | struct lttng_event_rule *rule, | |
995 | const char *exclusion) | |
996 | { | |
997 | int ret; | |
998 | char *exclusion_copy = NULL; | |
999 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
1000 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1001 | ||
1002 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || | |
1003 | !exclusion) { | |
1004 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1005 | goto end; | |
1006 | } | |
1007 | ||
0114db0e JG |
1008 | tracepoint = lttng::utils::container_of( |
1009 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
1010 | |
1011 | if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) { | |
1012 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1013 | goto end; | |
1014 | } | |
1015 | ||
1016 | exclusion_copy = strdup(exclusion); | |
1017 | if (!exclusion_copy) { | |
1018 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1019 | goto end; | |
1020 | } | |
1021 | ||
1022 | ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions, | |
1023 | exclusion_copy); | |
1024 | if (ret < 0) { | |
1025 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1026 | goto end; | |
1027 | } | |
1028 | ||
1029 | exclusion_copy = NULL; | |
1030 | end: | |
1031 | free(exclusion_copy); | |
1032 | return status; | |
1033 | } | |
1034 | ||
1035 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( | |
1036 | const struct lttng_event_rule *rule, unsigned int *count) | |
1037 | { | |
1038 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
1039 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1040 | ||
1041 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !count) { | |
1042 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1043 | goto end; | |
1044 | } | |
1045 | ||
0114db0e JG |
1046 | tracepoint = lttng::utils::container_of( |
1047 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
1048 | *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions); |
1049 | end: | |
1050 | return status; | |
1051 | } | |
1052 | ||
1053 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
1054 | const struct lttng_event_rule *rule, | |
1055 | unsigned int index, | |
1056 | const char **exclusion) | |
1057 | { | |
1058 | unsigned int count; | |
1059 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
1060 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1061 | ||
1062 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { | |
1063 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1064 | goto end; | |
1065 | } | |
1066 | ||
0114db0e JG |
1067 | tracepoint = lttng::utils::container_of( |
1068 | rule, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
1069 | if (lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(rule, &count) != |
1070 | LTTNG_EVENT_RULE_STATUS_OK) { | |
1071 | goto end; | |
1072 | } | |
1073 | ||
1074 | if (index >= count) { | |
1075 | goto end; | |
1076 | } | |
1077 | ||
a6bc4ca9 | 1078 | *exclusion = (const char *) lttng_dynamic_pointer_array_get_pointer( |
0a23a07d JR |
1079 | &tracepoint->exclusions, index); |
1080 | end: | |
1081 | return status; | |
1082 | } |