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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> | |
44760c20 | 19 | #include <lttng/event.h> |
6d420eff JR |
20 | |
21 | #define IS_TRACEPOINT_EVENT_RULE(rule) \ | |
22 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_TRACEPOINT) | |
23 | ||
24 | static void lttng_event_rule_tracepoint_destroy(struct lttng_event_rule *rule) | |
25 | { | |
26 | struct lttng_event_rule_tracepoint *tracepoint; | |
27 | ||
28 | if (rule == NULL) { | |
29 | return; | |
30 | } | |
31 | ||
32 | tracepoint = container_of( | |
33 | rule, struct lttng_event_rule_tracepoint, parent); | |
34 | ||
35 | lttng_dynamic_pointer_array_reset(&tracepoint->exclusions); | |
36 | free(tracepoint->pattern); | |
37 | free(tracepoint->filter_expression); | |
38 | free(tracepoint->internal_filter.filter); | |
39 | free(tracepoint->internal_filter.bytecode); | |
40 | free(tracepoint); | |
41 | } | |
42 | ||
43 | static bool lttng_event_rule_tracepoint_validate( | |
44 | const struct lttng_event_rule *rule) | |
45 | { | |
46 | bool valid = false; | |
47 | struct lttng_event_rule_tracepoint *tracepoint; | |
48 | ||
49 | if (!rule) { | |
50 | goto end; | |
51 | } | |
52 | ||
53 | tracepoint = container_of( | |
54 | rule, struct lttng_event_rule_tracepoint, parent); | |
55 | ||
56 | /* Required field. */ | |
57 | if (!tracepoint->pattern) { | |
58 | ERR("Invalid tracepoint event rule: a pattern must be set."); | |
59 | goto end; | |
60 | } | |
61 | ||
62 | /* Required field. */ | |
63 | if (tracepoint->domain == LTTNG_DOMAIN_NONE) { | |
64 | ERR("Invalid tracepoint event rule: a domain must be set."); | |
65 | goto end; | |
66 | } | |
67 | ||
68 | valid = true; | |
69 | end: | |
70 | return valid; | |
71 | } | |
72 | ||
73 | static int lttng_event_rule_tracepoint_serialize( | |
74 | const struct lttng_event_rule *rule, | |
75 | struct lttng_payload *payload) | |
76 | { | |
77 | int ret, i; | |
78 | size_t pattern_len, filter_expression_len, exclusions_len; | |
79 | struct lttng_event_rule_tracepoint *tracepoint; | |
80 | struct lttng_event_rule_tracepoint_comm tracepoint_comm; | |
81 | enum lttng_event_rule_status status; | |
82 | unsigned int exclusion_count; | |
83 | size_t exclusions_appended_len = 0; | |
84 | ||
85 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
86 | ret = -1; | |
87 | goto end; | |
88 | } | |
89 | ||
90 | DBG("Serializing tracepoint event rule."); | |
91 | tracepoint = container_of( | |
92 | rule, struct lttng_event_rule_tracepoint, parent); | |
93 | ||
94 | status = lttng_event_rule_tracepoint_get_exclusions_count(rule, &exclusion_count); | |
95 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
96 | ||
97 | pattern_len = strlen(tracepoint->pattern) + 1; | |
98 | ||
99 | if (tracepoint->filter_expression != NULL) { | |
100 | filter_expression_len = | |
101 | strlen(tracepoint->filter_expression) + 1; | |
102 | } else { | |
103 | filter_expression_len = 0; | |
104 | } | |
105 | ||
106 | exclusions_len = 0; | |
107 | for (i = 0; i < exclusion_count; i++) { | |
108 | const char *exclusion; | |
109 | ||
110 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
111 | rule, i, &exclusion); | |
112 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
113 | ||
114 | /* Length field. */ | |
115 | exclusions_len += sizeof(uint32_t); | |
116 | /* Payload (null terminated). */ | |
117 | exclusions_len += strlen(exclusion) + 1; | |
118 | } | |
119 | ||
120 | tracepoint_comm.domain_type = (int8_t) tracepoint->domain; | |
121 | tracepoint_comm.loglevel_type = (int8_t) tracepoint->loglevel.type; | |
122 | tracepoint_comm.loglevel_value = tracepoint->loglevel.value; | |
123 | tracepoint_comm.pattern_len = pattern_len; | |
124 | tracepoint_comm.filter_expression_len = filter_expression_len; | |
125 | tracepoint_comm.exclusions_count = exclusion_count; | |
126 | tracepoint_comm.exclusions_len = exclusions_len; | |
127 | ||
128 | ret = lttng_dynamic_buffer_append(&payload->buffer, &tracepoint_comm, | |
129 | sizeof(tracepoint_comm)); | |
130 | if (ret) { | |
131 | goto end; | |
132 | } | |
133 | ||
134 | ret = lttng_dynamic_buffer_append( | |
135 | &payload->buffer, tracepoint->pattern, pattern_len); | |
136 | if (ret) { | |
137 | goto end; | |
138 | } | |
139 | ||
140 | ret = lttng_dynamic_buffer_append(&payload->buffer, tracepoint->filter_expression, | |
141 | filter_expression_len); | |
142 | if (ret) { | |
143 | goto end; | |
144 | } | |
145 | ||
146 | for (i = 0; i < exclusion_count; i++) { | |
147 | size_t len; | |
148 | const char *exclusion; | |
149 | ||
150 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
151 | rule, i, &exclusion); | |
152 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
153 | ||
154 | len = strlen(exclusion) + 1; | |
155 | /* Append exclusion length, includes the null terminator. */ | |
156 | ret = lttng_dynamic_buffer_append( | |
157 | &payload->buffer, &len, sizeof(uint32_t)); | |
158 | if (ret) { | |
159 | goto end; | |
160 | } | |
161 | ||
162 | exclusions_appended_len += sizeof(uint32_t); | |
163 | ||
164 | /* Include the '\0' in the payload. */ | |
165 | ret = lttng_dynamic_buffer_append( | |
166 | &payload->buffer, exclusion, len); | |
167 | if (ret) { | |
168 | goto end; | |
169 | } | |
170 | ||
171 | exclusions_appended_len += len; | |
172 | } | |
173 | ||
174 | assert(exclusions_len == exclusions_appended_len); | |
175 | ||
176 | end: | |
177 | return ret; | |
178 | } | |
179 | ||
180 | static bool lttng_event_rule_tracepoint_is_equal( | |
181 | const struct lttng_event_rule *_a, | |
182 | const struct lttng_event_rule *_b) | |
183 | { | |
184 | int i; | |
185 | bool is_equal = false; | |
186 | struct lttng_event_rule_tracepoint *a, *b; | |
187 | unsigned int count_a, count_b; | |
188 | enum lttng_event_rule_status status; | |
189 | ||
190 | a = container_of(_a, struct lttng_event_rule_tracepoint, parent); | |
191 | b = container_of(_b, struct lttng_event_rule_tracepoint, parent); | |
192 | ||
193 | status = lttng_event_rule_tracepoint_get_exclusions_count(_a, &count_a); | |
194 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
195 | status = lttng_event_rule_tracepoint_get_exclusions_count(_b, &count_b); | |
196 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
197 | ||
198 | /* Quick checks. */ | |
199 | if (a->domain != b->domain) { | |
200 | goto end; | |
201 | } | |
202 | ||
203 | if (count_a != count_b) { | |
204 | goto end; | |
205 | } | |
206 | ||
207 | if (!!a->filter_expression != !!b->filter_expression) { | |
208 | goto end; | |
209 | } | |
210 | ||
211 | /* Long check. */ | |
212 | assert(a->pattern); | |
213 | assert(b->pattern); | |
214 | if (strcmp(a->pattern, b->pattern)) { | |
215 | goto end; | |
216 | } | |
217 | ||
218 | if (a->filter_expression && b->filter_expression) { | |
219 | if (strcmp(a->filter_expression, b->filter_expression)) { | |
220 | goto end; | |
221 | } | |
222 | } else if (!!a->filter_expression != !!b->filter_expression) { | |
223 | /* One is set; not the other. */ | |
224 | goto end; | |
225 | } | |
226 | ||
227 | if (a->loglevel.type != b->loglevel.type) { | |
228 | goto end; | |
229 | } | |
230 | ||
231 | if (a->loglevel.value != b->loglevel.value) { | |
232 | goto end; | |
233 | } | |
234 | ||
235 | for (i = 0; i < count_a; i++) { | |
236 | const char *exclusion_a, *exclusion_b; | |
237 | ||
238 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
239 | _a, i, &exclusion_a); | |
240 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
241 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
242 | _b, i, &exclusion_b); | |
243 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
244 | if (strcmp(exclusion_a, exclusion_b)) { | |
245 | goto end; | |
246 | } | |
247 | } | |
248 | ||
249 | is_equal = true; | |
250 | end: | |
251 | return is_equal; | |
252 | } | |
253 | ||
254 | /* | |
255 | * On success ret is 0; | |
256 | * | |
257 | * On error ret is negative. | |
258 | * | |
259 | * An event with NO loglevel and the name is * will return NULL. | |
260 | */ | |
261 | static int generate_agent_filter( | |
262 | const struct lttng_event_rule *rule, char **_agent_filter) | |
263 | { | |
264 | int err; | |
265 | int ret = 0; | |
266 | char *agent_filter = NULL; | |
267 | const char *pattern; | |
268 | const char *filter; | |
269 | enum lttng_loglevel_type loglevel_type; | |
270 | enum lttng_event_rule_status status; | |
271 | ||
272 | assert(rule); | |
273 | assert(_agent_filter); | |
274 | ||
275 | status = lttng_event_rule_tracepoint_get_pattern(rule, &pattern); | |
276 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
277 | ret = -1; | |
278 | goto end; | |
279 | } | |
280 | ||
281 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); | |
282 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
283 | filter = NULL; | |
284 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
285 | ret = -1; | |
286 | goto end; | |
287 | } | |
288 | ||
289 | status = lttng_event_rule_tracepoint_get_log_level_type( | |
290 | rule, &loglevel_type); | |
291 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
292 | ret = -1; | |
293 | goto end; | |
294 | } | |
295 | ||
296 | /* Don't add filter for the '*' event. */ | |
297 | if (strcmp(pattern, "*") != 0) { | |
298 | if (filter) { | |
299 | err = asprintf(&agent_filter, | |
300 | "(%s) && (logger_name == \"%s\")", | |
301 | filter, pattern); | |
302 | } else { | |
303 | err = asprintf(&agent_filter, "logger_name == \"%s\"", | |
304 | pattern); | |
305 | } | |
306 | ||
307 | if (err < 0) { | |
308 | PERROR("Failed to format agent filter string"); | |
309 | ret = -1; | |
310 | goto end; | |
311 | } | |
312 | } | |
313 | ||
314 | if (loglevel_type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
315 | const char *op; | |
316 | int loglevel_value; | |
317 | ||
318 | status = lttng_event_rule_tracepoint_get_log_level( | |
319 | rule, &loglevel_value); | |
320 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
321 | ret = -1; | |
322 | goto end; | |
323 | } | |
324 | ||
325 | if (loglevel_type == LTTNG_EVENT_LOGLEVEL_RANGE) { | |
326 | op = ">="; | |
327 | } else { | |
328 | op = "=="; | |
329 | } | |
330 | ||
331 | if (filter || agent_filter) { | |
332 | char *new_filter; | |
333 | ||
334 | err = asprintf(&new_filter, | |
335 | "(%s) && (int_loglevel %s %d)", | |
336 | agent_filter ? agent_filter : filter, | |
337 | op, loglevel_value); | |
338 | if (agent_filter) { | |
339 | free(agent_filter); | |
340 | } | |
341 | agent_filter = new_filter; | |
342 | } else { | |
343 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, | |
344 | loglevel_value); | |
345 | } | |
346 | ||
347 | if (err < 0) { | |
348 | PERROR("Failed to format agent filter string"); | |
349 | ret = -1; | |
350 | goto end; | |
351 | } | |
352 | } | |
353 | ||
354 | *_agent_filter = agent_filter; | |
355 | agent_filter = NULL; | |
356 | ||
357 | end: | |
358 | free(agent_filter); | |
359 | return ret; | |
360 | } | |
361 | ||
362 | static enum lttng_error_code | |
363 | lttng_event_rule_tracepoint_generate_filter_bytecode( | |
58daac01 JR |
364 | struct lttng_event_rule *rule, |
365 | const struct lttng_credentials *creds) | |
6d420eff JR |
366 | { |
367 | int ret; | |
368 | enum lttng_error_code ret_code; | |
369 | struct lttng_event_rule_tracepoint *tracepoint; | |
370 | enum lttng_domain_type domain_type; | |
371 | enum lttng_event_rule_status status; | |
372 | const char *filter; | |
2b00d462 | 373 | struct lttng_bytecode *bytecode = NULL; |
6d420eff JR |
374 | |
375 | assert(rule); | |
376 | ||
377 | tracepoint = container_of( | |
378 | rule, struct lttng_event_rule_tracepoint, parent); | |
379 | ||
380 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); | |
381 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
382 | filter = NULL; | |
383 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
384 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
385 | goto end; | |
386 | } | |
387 | ||
388 | if (filter && filter[0] == '\0') { | |
389 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
390 | goto error; | |
391 | } | |
392 | ||
393 | status = lttng_event_rule_tracepoint_get_domain_type( | |
394 | rule, &domain_type); | |
395 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
396 | ret_code = LTTNG_ERR_UNK; | |
397 | goto error; | |
398 | } | |
399 | ||
400 | switch (domain_type) { | |
401 | case LTTNG_DOMAIN_LOG4J: | |
402 | case LTTNG_DOMAIN_JUL: | |
403 | case LTTNG_DOMAIN_PYTHON: | |
404 | { | |
405 | char *agent_filter; | |
406 | ||
407 | ret = generate_agent_filter(rule, &agent_filter); | |
408 | if (ret) { | |
409 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
410 | goto error; | |
411 | } | |
412 | ||
413 | tracepoint->internal_filter.filter = agent_filter; | |
414 | break; | |
415 | } | |
416 | default: | |
417 | { | |
418 | if (filter) { | |
419 | tracepoint->internal_filter.filter = strdup(filter); | |
420 | if (tracepoint->internal_filter.filter == NULL) { | |
421 | ret_code = LTTNG_ERR_NOMEM; | |
422 | goto error; | |
423 | } | |
424 | } else { | |
425 | tracepoint->internal_filter.filter = NULL; | |
426 | } | |
427 | break; | |
428 | } | |
429 | } | |
430 | ||
431 | if (tracepoint->internal_filter.filter == NULL) { | |
432 | ret_code = LTTNG_OK; | |
433 | goto end; | |
434 | } | |
435 | ||
436 | ret = run_as_generate_filter_bytecode( | |
58daac01 | 437 | tracepoint->internal_filter.filter, creds, |
6d420eff JR |
438 | &bytecode); |
439 | if (ret) { | |
440 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
441 | goto end; | |
442 | } | |
443 | ||
444 | tracepoint->internal_filter.bytecode = bytecode; | |
445 | bytecode = NULL; | |
446 | ret_code = LTTNG_OK; | |
447 | ||
448 | error: | |
449 | end: | |
450 | free(bytecode); | |
451 | return ret_code; | |
452 | } | |
453 | ||
454 | static const char *lttng_event_rule_tracepoint_get_internal_filter( | |
455 | const struct lttng_event_rule *rule) | |
456 | { | |
457 | struct lttng_event_rule_tracepoint *tracepoint; | |
458 | ||
459 | assert(rule); | |
460 | tracepoint = container_of( | |
461 | rule, struct lttng_event_rule_tracepoint, parent); | |
462 | return tracepoint->internal_filter.filter; | |
463 | } | |
464 | ||
2b00d462 | 465 | static const struct lttng_bytecode * |
6d420eff JR |
466 | lttng_event_rule_tracepoint_get_internal_filter_bytecode( |
467 | const struct lttng_event_rule *rule) | |
468 | { | |
469 | struct lttng_event_rule_tracepoint *tracepoint; | |
470 | ||
471 | assert(rule); | |
472 | tracepoint = container_of( | |
473 | rule, struct lttng_event_rule_tracepoint, parent); | |
474 | return tracepoint->internal_filter.bytecode; | |
475 | } | |
476 | ||
993578ff | 477 | static enum lttng_event_rule_generate_exclusions_status |
6d420eff | 478 | lttng_event_rule_tracepoint_generate_exclusions( |
993578ff JR |
479 | const struct lttng_event_rule *rule, |
480 | struct lttng_event_exclusion **_exclusions) | |
6d420eff | 481 | { |
993578ff JR |
482 | unsigned int nb_exclusions = 0, i; |
483 | enum lttng_domain_type domain_type; | |
484 | struct lttng_event_exclusion *exclusions; | |
485 | enum lttng_event_rule_status event_rule_status; | |
486 | enum lttng_event_rule_generate_exclusions_status ret_status; | |
6d420eff | 487 | |
993578ff JR |
488 | assert(_exclusions); |
489 | ||
490 | event_rule_status = lttng_event_rule_tracepoint_get_domain_type( | |
491 | rule, &domain_type); | |
492 | assert(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); | |
6d420eff JR |
493 | |
494 | switch (domain_type) { | |
495 | case LTTNG_DOMAIN_KERNEL: | |
496 | case LTTNG_DOMAIN_JUL: | |
497 | case LTTNG_DOMAIN_LOG4J: | |
498 | case LTTNG_DOMAIN_PYTHON: | |
499 | /* Not supported. */ | |
993578ff JR |
500 | exclusions = NULL; |
501 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; | |
6d420eff JR |
502 | goto end; |
503 | case LTTNG_DOMAIN_UST: | |
504 | /* Exclusions supported. */ | |
505 | break; | |
506 | default: | |
993578ff | 507 | /* Unknown domain. */ |
6d420eff JR |
508 | abort(); |
509 | } | |
510 | ||
993578ff | 511 | event_rule_status = lttng_event_rule_tracepoint_get_exclusions_count( |
6d420eff | 512 | rule, &nb_exclusions); |
993578ff | 513 | assert(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); |
6d420eff JR |
514 | if (nb_exclusions == 0) { |
515 | /* Nothing to do. */ | |
993578ff JR |
516 | exclusions = NULL; |
517 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; | |
6d420eff JR |
518 | goto end; |
519 | } | |
520 | ||
993578ff JR |
521 | exclusions = zmalloc(sizeof(struct lttng_event_exclusion) + |
522 | (LTTNG_SYMBOL_NAME_LEN * nb_exclusions)); | |
523 | if (!exclusions) { | |
6d420eff | 524 | PERROR("Failed to allocate exclusions buffer"); |
993578ff | 525 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OUT_OF_MEMORY; |
6d420eff JR |
526 | goto end; |
527 | } | |
528 | ||
993578ff | 529 | exclusions->count = nb_exclusions; |
6d420eff | 530 | for (i = 0; i < nb_exclusions; i++) { |
993578ff JR |
531 | int copy_ret; |
532 | const char *exclusion_str; | |
533 | ||
534 | event_rule_status = | |
535 | lttng_event_rule_tracepoint_get_exclusion_at_index( | |
536 | rule, i, &exclusion_str); | |
537 | assert(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); | |
538 | ||
539 | copy_ret = lttng_strncpy(exclusions->names[i], exclusion_str, | |
540 | LTTNG_SYMBOL_NAME_LEN); | |
541 | if (copy_ret) { | |
542 | free(exclusions); | |
543 | exclusions = NULL; | |
544 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_ERROR; | |
545 | goto end; | |
546 | } | |
6d420eff JR |
547 | } |
548 | ||
993578ff JR |
549 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OK; |
550 | ||
6d420eff | 551 | end: |
993578ff JR |
552 | *_exclusions = exclusions; |
553 | return ret_status; | |
6d420eff JR |
554 | } |
555 | ||
556 | static void destroy_lttng_exclusions_element(void *ptr) | |
557 | { | |
558 | free(ptr); | |
559 | } | |
560 | ||
959e3c66 JR |
561 | static unsigned long lttng_event_rule_tracepoint_hash( |
562 | const struct lttng_event_rule *rule) | |
563 | { | |
564 | unsigned long hash; | |
565 | unsigned int i, exclusion_count; | |
566 | enum lttng_event_rule_status status; | |
567 | struct lttng_event_rule_tracepoint *tp_rule = | |
568 | container_of(rule, typeof(*tp_rule), parent); | |
569 | ||
570 | hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_TRACEPOINT, | |
571 | lttng_ht_seed); | |
572 | hash ^= hash_key_ulong((void *) tp_rule->domain, lttng_ht_seed); | |
573 | hash ^= hash_key_str(tp_rule->pattern, lttng_ht_seed); | |
574 | ||
575 | if (tp_rule->filter_expression) { | |
576 | hash ^= hash_key_str(tp_rule->filter_expression, lttng_ht_seed); | |
577 | } | |
578 | ||
579 | hash ^= hash_key_ulong((void *) tp_rule->loglevel.type, | |
580 | lttng_ht_seed); | |
581 | if (tp_rule->loglevel.type != LTTNG_EVENT_LOGLEVEL_ALL) { | |
582 | hash ^= hash_key_ulong( | |
583 | (void *) (unsigned long) tp_rule->loglevel.value, | |
584 | lttng_ht_seed); | |
585 | } | |
586 | ||
587 | status = lttng_event_rule_tracepoint_get_exclusions_count(rule, | |
588 | &exclusion_count); | |
589 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
590 | ||
591 | for (i = 0; i < exclusion_count; i++) { | |
592 | const char *exclusion; | |
593 | ||
594 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
595 | rule, i, &exclusion); | |
596 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
597 | hash ^= hash_key_str(exclusion, lttng_ht_seed); | |
598 | } | |
599 | ||
600 | return hash; | |
601 | } | |
602 | ||
44760c20 JR |
603 | static struct lttng_event *lttng_event_rule_tracepoint_generate_lttng_event( |
604 | const struct lttng_event_rule *rule) | |
605 | { | |
606 | int ret; | |
607 | const struct lttng_event_rule_tracepoint *tracepoint; | |
608 | struct lttng_event *local_event = NULL; | |
609 | struct lttng_event *event = NULL; | |
610 | ||
611 | tracepoint = container_of( | |
612 | rule, const struct lttng_event_rule_tracepoint, parent); | |
613 | ||
614 | local_event = zmalloc(sizeof(*local_event)); | |
615 | if (!local_event) { | |
616 | goto error; | |
617 | } | |
618 | ||
619 | local_event->type = LTTNG_EVENT_TRACEPOINT; | |
620 | ret = lttng_strncpy(local_event->name, tracepoint->pattern, | |
621 | sizeof(local_event->name)); | |
622 | if (ret) { | |
623 | ERR("Truncation occurred when copying event rule pattern to `lttng_event` structure: pattern = '%s'", | |
624 | tracepoint->pattern); | |
625 | goto error; | |
626 | } | |
627 | ||
628 | local_event->loglevel_type = tracepoint->loglevel.type; | |
629 | local_event->loglevel = tracepoint->loglevel.value; | |
630 | ||
631 | event = local_event; | |
632 | local_event = NULL; | |
633 | error: | |
634 | free(local_event); | |
635 | return event; | |
636 | } | |
637 | ||
6d420eff JR |
638 | struct lttng_event_rule *lttng_event_rule_tracepoint_create( |
639 | enum lttng_domain_type domain_type) | |
640 | { | |
641 | struct lttng_event_rule *rule = NULL; | |
642 | struct lttng_event_rule_tracepoint *tp_rule; | |
643 | ||
644 | if (domain_type == LTTNG_DOMAIN_NONE) { | |
645 | goto end; | |
646 | } | |
647 | ||
648 | tp_rule = zmalloc(sizeof(struct lttng_event_rule_tracepoint)); | |
649 | if (!tp_rule) { | |
650 | goto end; | |
651 | } | |
652 | ||
653 | rule = &tp_rule->parent; | |
654 | lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_TRACEPOINT); | |
655 | tp_rule->parent.validate = lttng_event_rule_tracepoint_validate; | |
656 | tp_rule->parent.serialize = lttng_event_rule_tracepoint_serialize; | |
657 | tp_rule->parent.equal = lttng_event_rule_tracepoint_is_equal; | |
658 | tp_rule->parent.destroy = lttng_event_rule_tracepoint_destroy; | |
659 | tp_rule->parent.generate_filter_bytecode = | |
660 | lttng_event_rule_tracepoint_generate_filter_bytecode; | |
661 | tp_rule->parent.get_filter = | |
662 | lttng_event_rule_tracepoint_get_internal_filter; | |
663 | tp_rule->parent.get_filter_bytecode = | |
664 | lttng_event_rule_tracepoint_get_internal_filter_bytecode; | |
665 | tp_rule->parent.generate_exclusions = | |
666 | lttng_event_rule_tracepoint_generate_exclusions; | |
959e3c66 | 667 | tp_rule->parent.hash = lttng_event_rule_tracepoint_hash; |
44760c20 JR |
668 | tp_rule->parent.generate_lttng_event = |
669 | lttng_event_rule_tracepoint_generate_lttng_event; | |
6d420eff JR |
670 | |
671 | tp_rule->domain = domain_type; | |
672 | tp_rule->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL; | |
673 | ||
674 | lttng_dynamic_pointer_array_init(&tp_rule->exclusions, | |
675 | destroy_lttng_exclusions_element); | |
676 | end: | |
677 | return rule; | |
678 | } | |
679 | ||
680 | LTTNG_HIDDEN | |
681 | ssize_t lttng_event_rule_tracepoint_create_from_payload( | |
682 | struct lttng_payload_view *view, | |
683 | struct lttng_event_rule **_event_rule) | |
684 | { | |
685 | ssize_t ret, offset = 0; | |
686 | int i; | |
687 | enum lttng_event_rule_status status; | |
688 | enum lttng_domain_type domain_type; | |
689 | enum lttng_loglevel_type loglevel_type; | |
690 | const struct lttng_event_rule_tracepoint_comm *tracepoint_comm; | |
691 | const char *pattern; | |
692 | const char *filter_expression = NULL; | |
693 | const char **exclusions = NULL; | |
694 | const uint32_t *exclusion_len; | |
695 | const char *exclusion; | |
696 | struct lttng_buffer_view current_buffer_view; | |
697 | struct lttng_event_rule *rule = NULL; | |
698 | ||
699 | if (!_event_rule) { | |
700 | ret = -1; | |
701 | goto end; | |
702 | } | |
703 | ||
3e6e0df2 JG |
704 | current_buffer_view = lttng_buffer_view_from_view( |
705 | &view->buffer, offset, sizeof(*tracepoint_comm)); | |
706 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
6d420eff JR |
707 | ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header."); |
708 | ret = -1; | |
709 | goto end; | |
710 | } | |
711 | ||
6d420eff JR |
712 | tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data; |
713 | ||
6d420eff JR |
714 | if (tracepoint_comm->domain_type <= LTTNG_DOMAIN_NONE || |
715 | tracepoint_comm->domain_type > LTTNG_DOMAIN_PYTHON) { | |
716 | /* Invalid domain value. */ | |
717 | ERR("Invalid domain type value (%i) found in tracepoint_comm buffer.", | |
718 | (int) tracepoint_comm->domain_type); | |
719 | ret = -1; | |
720 | goto end; | |
721 | } | |
722 | ||
723 | domain_type = (enum lttng_domain_type) tracepoint_comm->domain_type; | |
724 | rule = lttng_event_rule_tracepoint_create(domain_type); | |
725 | if (!rule) { | |
726 | ERR("Failed to create event rule tracepoint."); | |
727 | ret = -1; | |
728 | goto end; | |
729 | } | |
730 | ||
731 | loglevel_type = (enum lttng_loglevel_type) | |
732 | tracepoint_comm->loglevel_type; | |
733 | switch (loglevel_type) { | |
734 | case LTTNG_EVENT_LOGLEVEL_ALL: | |
735 | status = lttng_event_rule_tracepoint_set_log_level_all(rule); | |
736 | break; | |
737 | case LTTNG_EVENT_LOGLEVEL_RANGE: | |
738 | status = lttng_event_rule_tracepoint_set_log_level_range_lower_bound(rule, | |
739 | (enum lttng_loglevel_type) tracepoint_comm | |
740 | ->loglevel_value); | |
741 | break; | |
742 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
743 | status = lttng_event_rule_tracepoint_set_log_level(rule, | |
744 | (enum lttng_loglevel_type) tracepoint_comm | |
745 | ->loglevel_value); | |
746 | break; | |
747 | default: | |
748 | ERR("Failed to set event rule tracepoint loglevel: unknown loglevel type."); | |
749 | ret = -1; | |
750 | goto end; | |
751 | } | |
752 | ||
753 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
754 | ERR("Failed to set event rule tracepoint loglevel."); | |
755 | } | |
756 | ||
757 | /* Skip to payload. */ | |
758 | offset += current_buffer_view.size; | |
759 | ||
760 | /* Map the pattern. */ | |
761 | current_buffer_view = lttng_buffer_view_from_view( | |
762 | &view->buffer, offset, tracepoint_comm->pattern_len); | |
3e6e0df2 JG |
763 | |
764 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
6d420eff JR |
765 | ret = -1; |
766 | goto end; | |
767 | } | |
768 | ||
3e6e0df2 | 769 | pattern = current_buffer_view.data; |
6d420eff JR |
770 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, |
771 | tracepoint_comm->pattern_len)) { | |
772 | ret = -1; | |
773 | goto end; | |
774 | } | |
775 | ||
776 | /* Skip after the pattern. */ | |
777 | offset += tracepoint_comm->pattern_len; | |
778 | ||
779 | if (!tracepoint_comm->filter_expression_len) { | |
780 | goto skip_filter_expression; | |
781 | } | |
782 | ||
783 | /* Map the filter_expression. */ | |
784 | current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, | |
785 | tracepoint_comm->filter_expression_len); | |
3e6e0df2 | 786 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
6d420eff JR |
787 | ret = -1; |
788 | goto end; | |
789 | } | |
790 | ||
3e6e0df2 | 791 | filter_expression = current_buffer_view.data; |
6d420eff JR |
792 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, |
793 | filter_expression, | |
794 | tracepoint_comm->filter_expression_len)) { | |
795 | ret = -1; | |
796 | goto end; | |
797 | } | |
798 | ||
799 | /* Skip after the pattern. */ | |
800 | offset += tracepoint_comm->filter_expression_len; | |
801 | ||
802 | skip_filter_expression: | |
803 | for (i = 0; i < tracepoint_comm->exclusions_count; i++) { | |
804 | current_buffer_view = lttng_buffer_view_from_view( | |
805 | &view->buffer, offset, sizeof(*exclusion_len)); | |
3e6e0df2 | 806 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
6d420eff JR |
807 | ret = -1; |
808 | goto end; | |
809 | } | |
810 | ||
3e6e0df2 | 811 | exclusion_len = (typeof(exclusion_len)) current_buffer_view.data; |
6d420eff | 812 | offset += sizeof(*exclusion_len); |
3e6e0df2 | 813 | |
6d420eff JR |
814 | current_buffer_view = lttng_buffer_view_from_view( |
815 | &view->buffer, offset, *exclusion_len); | |
3e6e0df2 JG |
816 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
817 | ret = -1; | |
818 | goto end; | |
819 | } | |
820 | ||
6d420eff JR |
821 | exclusion = current_buffer_view.data; |
822 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, | |
823 | exclusion, *exclusion_len)) { | |
824 | ret = -1; | |
825 | goto end; | |
826 | } | |
827 | ||
828 | status = lttng_event_rule_tracepoint_add_exclusion(rule, exclusion); | |
829 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
830 | ERR("Failed to add event rule tracepoint exclusion \"%s\".", | |
831 | exclusion); | |
832 | ret = -1; | |
833 | goto end; | |
834 | } | |
835 | ||
836 | /* Skip to next exclusion. */ | |
837 | offset += *exclusion_len; | |
838 | } | |
839 | ||
840 | status = lttng_event_rule_tracepoint_set_pattern(rule, pattern); | |
841 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
842 | ERR("Failed to set event rule tracepoint pattern."); | |
843 | ret = -1; | |
844 | goto end; | |
845 | } | |
846 | ||
847 | if (filter_expression) { | |
848 | status = lttng_event_rule_tracepoint_set_filter( | |
849 | rule, filter_expression); | |
850 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
851 | ERR("Failed to set event rule tracepoint pattern."); | |
852 | ret = -1; | |
853 | goto end; | |
854 | } | |
855 | } | |
856 | ||
857 | *_event_rule = rule; | |
858 | rule = NULL; | |
859 | ret = offset; | |
860 | end: | |
861 | free(exclusions); | |
862 | lttng_event_rule_destroy(rule); | |
863 | return ret; | |
864 | } | |
865 | ||
866 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_pattern( | |
867 | struct lttng_event_rule *rule, const char *pattern) | |
868 | { | |
869 | char *pattern_copy = NULL; | |
870 | struct lttng_event_rule_tracepoint *tracepoint; | |
871 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
872 | ||
873 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern || | |
874 | strlen(pattern) == 0) { | |
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 | pattern_copy = strdup(pattern); | |
882 | if (!pattern_copy) { | |
883 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
884 | goto end; | |
885 | } | |
886 | ||
887 | free(tracepoint->pattern); | |
888 | ||
889 | tracepoint->pattern = pattern_copy; | |
890 | pattern_copy = NULL; | |
891 | end: | |
892 | return status; | |
893 | } | |
894 | ||
895 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_pattern( | |
896 | const struct lttng_event_rule *rule, const char **pattern) | |
897 | { | |
898 | struct lttng_event_rule_tracepoint *tracepoint; | |
899 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
900 | ||
901 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern) { | |
902 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
903 | goto end; | |
904 | } | |
905 | ||
906 | tracepoint = container_of( | |
907 | rule, struct lttng_event_rule_tracepoint, parent); | |
908 | if (!tracepoint->pattern) { | |
909 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
910 | goto end; | |
911 | } | |
912 | ||
913 | *pattern = tracepoint->pattern; | |
914 | end: | |
915 | return status; | |
916 | } | |
917 | ||
918 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_domain_type( | |
919 | const struct lttng_event_rule *rule, | |
920 | enum lttng_domain_type *type) | |
921 | { | |
922 | struct lttng_event_rule_tracepoint *tracepoint; | |
923 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
924 | ||
925 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) { | |
926 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
927 | goto end; | |
928 | } | |
929 | ||
930 | tracepoint = container_of( | |
931 | rule, struct lttng_event_rule_tracepoint, parent); | |
932 | *type = tracepoint->domain; | |
933 | end: | |
934 | return status; | |
935 | } | |
936 | ||
937 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_filter( | |
938 | struct lttng_event_rule *rule, const char *expression) | |
939 | { | |
940 | char *expression_copy = NULL; | |
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) || !expression || | |
945 | strlen(expression) == 0) { | |
946 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
947 | goto end; | |
948 | } | |
949 | ||
950 | tracepoint = container_of( | |
951 | rule, struct lttng_event_rule_tracepoint, parent); | |
952 | expression_copy = strdup(expression); | |
953 | if (!expression_copy) { | |
954 | PERROR("Failed to copy filter expression"); | |
955 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
956 | goto end; | |
957 | } | |
958 | ||
959 | if (tracepoint->filter_expression) { | |
960 | free(tracepoint->filter_expression); | |
961 | } | |
962 | ||
963 | tracepoint->filter_expression = expression_copy; | |
964 | expression_copy = NULL; | |
965 | end: | |
966 | return status; | |
967 | } | |
968 | ||
969 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_filter( | |
970 | const struct lttng_event_rule *rule, const char **expression) | |
971 | { | |
972 | struct lttng_event_rule_tracepoint *tracepoint; | |
973 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
974 | ||
975 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression) { | |
976 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
977 | goto end; | |
978 | } | |
979 | ||
980 | tracepoint = container_of( | |
981 | rule, struct lttng_event_rule_tracepoint, parent); | |
982 | if (!tracepoint->filter_expression) { | |
983 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
984 | goto end; | |
985 | } | |
986 | ||
987 | *expression = tracepoint->filter_expression; | |
988 | end: | |
989 | return status; | |
990 | } | |
991 | ||
992 | static bool log_level_value_valid( | |
993 | int level, enum lttng_domain_type domain) | |
994 | { | |
995 | bool valid = false; | |
996 | ||
997 | switch (domain) { | |
998 | case LTTNG_DOMAIN_KERNEL: | |
999 | case LTTNG_DOMAIN_UST: | |
1000 | if (level < LTTNG_LOGLEVEL_EMERG) { | |
1001 | /* Invalid. */ | |
1002 | goto end; | |
1003 | } | |
1004 | if (level > LTTNG_LOGLEVEL_DEBUG) { | |
1005 | /* Invalid. */ | |
1006 | goto end; | |
1007 | } | |
1008 | ||
1009 | valid = true; | |
1010 | break; | |
1011 | case LTTNG_DOMAIN_JUL: | |
1012 | case LTTNG_DOMAIN_LOG4J: | |
1013 | case LTTNG_DOMAIN_PYTHON: | |
1014 | /* | |
1015 | * For both JUL and LOG4J custom log level are possible and can | |
1016 | * spawn the entire int32 range. | |
1017 | * For python, custom log level are possible, it is not clear if | |
1018 | * negative value are accepted (NOTSET == 0) but the source code | |
1019 | * validate against the int type implying that negative values | |
1020 | * are accepted. | |
1021 | */ | |
1022 | valid = true; | |
1023 | goto end; | |
1024 | ||
1025 | case LTTNG_DOMAIN_NONE: | |
1026 | default: | |
1027 | abort(); | |
1028 | } | |
1029 | ||
1030 | end: | |
1031 | return valid; | |
1032 | } | |
1033 | ||
1034 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level( | |
1035 | struct lttng_event_rule *rule, int level) | |
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 | ||
1048 | if (!log_level_value_valid(level, tracepoint->domain)) { | |
1049 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1050 | goto end; | |
1051 | } | |
1052 | ||
1053 | tracepoint->loglevel.value = level; | |
1054 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
1055 | end: | |
1056 | return status; | |
1057 | } | |
1058 | ||
1059 | enum lttng_event_rule_status | |
1060 | lttng_event_rule_tracepoint_set_log_level_range_lower_bound( | |
1061 | struct lttng_event_rule *rule, int level) | |
1062 | { | |
1063 | struct lttng_event_rule_tracepoint *tracepoint; | |
1064 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1065 | ||
1066 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
1067 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1068 | goto end; | |
1069 | } | |
1070 | ||
1071 | tracepoint = container_of( | |
1072 | rule, struct lttng_event_rule_tracepoint, parent); | |
1073 | ||
1074 | if (!log_level_value_valid(level, tracepoint->domain)) { | |
1075 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1076 | goto end; | |
1077 | } | |
1078 | ||
1079 | tracepoint->loglevel.value = level; | |
1080 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
1081 | end: | |
1082 | return status; | |
1083 | } | |
1084 | ||
1085 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level_all( | |
1086 | struct lttng_event_rule *rule) | |
1087 | { | |
1088 | struct lttng_event_rule_tracepoint *tracepoint; | |
1089 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1090 | ||
1091 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
1092 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1093 | goto end; | |
1094 | } | |
1095 | ||
1096 | tracepoint = container_of( | |
1097 | rule, struct lttng_event_rule_tracepoint, parent); | |
1098 | tracepoint->loglevel.type = LTTNG_EVENT_LOGLEVEL_ALL; | |
1099 | end: | |
1100 | return status; | |
1101 | } | |
1102 | ||
1103 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level_type( | |
1104 | const struct lttng_event_rule *rule, | |
1105 | enum lttng_loglevel_type *type) | |
1106 | { | |
1107 | struct lttng_event_rule_tracepoint *tracepoint; | |
1108 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1109 | ||
1110 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) { | |
1111 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1112 | goto end; | |
1113 | } | |
1114 | ||
1115 | tracepoint = container_of( | |
1116 | rule, struct lttng_event_rule_tracepoint, parent); | |
1117 | *type = tracepoint->loglevel.type; | |
1118 | end: | |
1119 | return status; | |
1120 | } | |
1121 | ||
1122 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level( | |
1123 | const struct lttng_event_rule *rule, int *level) | |
1124 | { | |
1125 | struct lttng_event_rule_tracepoint *tracepoint; | |
1126 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1127 | ||
1128 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !level) { | |
1129 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1130 | goto end; | |
1131 | } | |
1132 | ||
1133 | tracepoint = container_of( | |
1134 | rule, struct lttng_event_rule_tracepoint, parent); | |
1135 | if (tracepoint->loglevel.type == LTTNG_EVENT_LOGLEVEL_ALL) { | |
1136 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
1137 | goto end; | |
1138 | } | |
1139 | ||
1140 | *level = tracepoint->loglevel.value; | |
1141 | end: | |
1142 | return status; | |
1143 | } | |
1144 | ||
1145 | enum lttng_event_rule_status lttng_event_rule_tracepoint_add_exclusion( | |
1146 | struct lttng_event_rule *rule, | |
1147 | const char *exclusion) | |
1148 | { | |
1149 | int ret; | |
1150 | char *exclusion_copy = NULL; | |
1151 | struct lttng_event_rule_tracepoint *tracepoint; | |
1152 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1153 | enum lttng_domain_type domain_type; | |
1154 | ||
1155 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || | |
1156 | !exclusion) { | |
1157 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1158 | goto end; | |
1159 | } | |
1160 | ||
1161 | tracepoint = container_of( | |
1162 | rule, struct lttng_event_rule_tracepoint, parent); | |
1163 | ||
1164 | status = lttng_event_rule_tracepoint_get_domain_type( | |
1165 | rule, &domain_type); | |
1166 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
1167 | goto end; | |
1168 | } | |
1169 | ||
1170 | switch (domain_type) { | |
1171 | case LTTNG_DOMAIN_KERNEL: | |
1172 | case LTTNG_DOMAIN_JUL: | |
1173 | case LTTNG_DOMAIN_LOG4J: | |
1174 | case LTTNG_DOMAIN_PYTHON: | |
1175 | status = LTTNG_EVENT_RULE_STATUS_UNSUPPORTED; | |
1176 | goto end; | |
1177 | case LTTNG_DOMAIN_UST: | |
1178 | /* Exclusions supported. */ | |
1179 | break; | |
1180 | default: | |
1181 | abort(); | |
1182 | } | |
1183 | ||
1184 | if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) { | |
1185 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1186 | goto end; | |
1187 | } | |
1188 | ||
1189 | exclusion_copy = strdup(exclusion); | |
1190 | if (!exclusion_copy) { | |
1191 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1192 | goto end; | |
1193 | } | |
1194 | ||
1195 | ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions, | |
1196 | exclusion_copy); | |
1197 | if (ret < 0) { | |
1198 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1199 | goto end; | |
1200 | } | |
1201 | ||
1202 | exclusion_copy = NULL; | |
1203 | end: | |
1204 | free(exclusion_copy); | |
1205 | return status; | |
1206 | } | |
1207 | ||
1208 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusions_count( | |
1209 | const struct lttng_event_rule *rule, unsigned int *count) | |
1210 | { | |
1211 | struct lttng_event_rule_tracepoint *tracepoint; | |
1212 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1213 | ||
1214 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !count) { | |
1215 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1216 | goto end; | |
1217 | } | |
1218 | ||
1219 | tracepoint = container_of( | |
1220 | rule, struct lttng_event_rule_tracepoint, parent); | |
1221 | *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions); | |
1222 | end: | |
1223 | return status; | |
1224 | } | |
1225 | ||
1226 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusion_at_index( | |
1227 | const struct lttng_event_rule *rule, | |
1228 | unsigned int index, | |
1229 | const char **exclusion) | |
1230 | { | |
1231 | unsigned int count; | |
1232 | struct lttng_event_rule_tracepoint *tracepoint; | |
1233 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1234 | ||
1235 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { | |
1236 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1237 | goto end; | |
1238 | } | |
1239 | ||
1240 | tracepoint = container_of( | |
1241 | rule, struct lttng_event_rule_tracepoint, parent); | |
1242 | if (lttng_event_rule_tracepoint_get_exclusions_count(rule, &count) != | |
1243 | LTTNG_EVENT_RULE_STATUS_OK) { | |
1244 | goto end; | |
1245 | } | |
1246 | ||
1247 | if (index >= count) { | |
1248 | goto end; | |
1249 | } | |
1250 | ||
1251 | *exclusion = lttng_dynamic_pointer_array_get_pointer( | |
1252 | &tracepoint->exclusions, index); | |
1253 | end: | |
1254 | return status; | |
1255 | } |