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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> | |
85b05318 | 12 | #include <common/optional.h> |
6d420eff JR |
13 | #include <common/payload.h> |
14 | #include <common/payload-view.h> | |
15 | #include <common/runas.h> | |
959e3c66 JR |
16 | #include <common/hashtable/hashtable.h> |
17 | #include <common/hashtable/utils.h> | |
40fd2ccf | 18 | #include <common/string-utils/string-utils.h> |
6d420eff JR |
19 | #include <lttng/event-rule/event-rule-internal.h> |
20 | #include <lttng/event-rule/tracepoint-internal.h> | |
85b05318 | 21 | #include <lttng/log-level-rule.h> |
44760c20 | 22 | #include <lttng/event.h> |
6d420eff JR |
23 | |
24 | #define IS_TRACEPOINT_EVENT_RULE(rule) \ | |
25 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_TRACEPOINT) | |
26 | ||
27 | static void lttng_event_rule_tracepoint_destroy(struct lttng_event_rule *rule) | |
28 | { | |
29 | struct lttng_event_rule_tracepoint *tracepoint; | |
30 | ||
31 | if (rule == NULL) { | |
32 | return; | |
33 | } | |
34 | ||
35 | tracepoint = container_of( | |
36 | rule, struct lttng_event_rule_tracepoint, parent); | |
37 | ||
38 | lttng_dynamic_pointer_array_reset(&tracepoint->exclusions); | |
39 | free(tracepoint->pattern); | |
40 | free(tracepoint->filter_expression); | |
41 | free(tracepoint->internal_filter.filter); | |
42 | free(tracepoint->internal_filter.bytecode); | |
43 | free(tracepoint); | |
44 | } | |
45 | ||
46 | static bool lttng_event_rule_tracepoint_validate( | |
47 | const struct lttng_event_rule *rule) | |
48 | { | |
49 | bool valid = false; | |
50 | struct lttng_event_rule_tracepoint *tracepoint; | |
51 | ||
52 | if (!rule) { | |
53 | goto end; | |
54 | } | |
55 | ||
56 | tracepoint = container_of( | |
57 | rule, struct lttng_event_rule_tracepoint, parent); | |
58 | ||
59 | /* Required field. */ | |
60 | if (!tracepoint->pattern) { | |
61 | ERR("Invalid tracepoint event rule: a pattern must be set."); | |
62 | goto end; | |
63 | } | |
64 | ||
65 | /* Required field. */ | |
66 | if (tracepoint->domain == LTTNG_DOMAIN_NONE) { | |
67 | ERR("Invalid tracepoint event rule: a domain must be set."); | |
68 | goto end; | |
69 | } | |
70 | ||
71 | valid = true; | |
72 | end: | |
73 | return valid; | |
74 | } | |
75 | ||
76 | static int lttng_event_rule_tracepoint_serialize( | |
77 | const struct lttng_event_rule *rule, | |
78 | struct lttng_payload *payload) | |
79 | { | |
80 | int ret, i; | |
85b05318 JR |
81 | size_t pattern_len, filter_expression_len, exclusions_len, header_offset; |
82 | size_t size_before_log_level_rule; | |
6d420eff JR |
83 | struct lttng_event_rule_tracepoint *tracepoint; |
84 | struct lttng_event_rule_tracepoint_comm tracepoint_comm; | |
85 | enum lttng_event_rule_status status; | |
86 | unsigned int exclusion_count; | |
87 | size_t exclusions_appended_len = 0; | |
85b05318 | 88 | struct lttng_event_rule_tracepoint_comm *header; |
6d420eff JR |
89 | |
90 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
91 | ret = -1; | |
92 | goto end; | |
93 | } | |
94 | ||
85b05318 JR |
95 | header_offset = payload->buffer.size; |
96 | ||
6d420eff JR |
97 | DBG("Serializing tracepoint event rule."); |
98 | tracepoint = container_of( | |
99 | rule, struct lttng_event_rule_tracepoint, parent); | |
100 | ||
101 | status = lttng_event_rule_tracepoint_get_exclusions_count(rule, &exclusion_count); | |
102 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
103 | ||
104 | pattern_len = strlen(tracepoint->pattern) + 1; | |
105 | ||
106 | if (tracepoint->filter_expression != NULL) { | |
107 | filter_expression_len = | |
108 | strlen(tracepoint->filter_expression) + 1; | |
109 | } else { | |
110 | filter_expression_len = 0; | |
111 | } | |
112 | ||
113 | exclusions_len = 0; | |
114 | for (i = 0; i < exclusion_count; i++) { | |
115 | const char *exclusion; | |
116 | ||
117 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
118 | rule, i, &exclusion); | |
119 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
120 | ||
121 | /* Length field. */ | |
122 | exclusions_len += sizeof(uint32_t); | |
123 | /* Payload (null terminated). */ | |
124 | exclusions_len += strlen(exclusion) + 1; | |
125 | } | |
126 | ||
127 | tracepoint_comm.domain_type = (int8_t) tracepoint->domain; | |
6d420eff JR |
128 | tracepoint_comm.pattern_len = pattern_len; |
129 | tracepoint_comm.filter_expression_len = filter_expression_len; | |
130 | tracepoint_comm.exclusions_count = exclusion_count; | |
131 | tracepoint_comm.exclusions_len = exclusions_len; | |
132 | ||
133 | ret = lttng_dynamic_buffer_append(&payload->buffer, &tracepoint_comm, | |
134 | sizeof(tracepoint_comm)); | |
135 | if (ret) { | |
136 | goto end; | |
137 | } | |
138 | ||
139 | ret = lttng_dynamic_buffer_append( | |
140 | &payload->buffer, tracepoint->pattern, pattern_len); | |
141 | if (ret) { | |
142 | goto end; | |
143 | } | |
144 | ||
145 | ret = lttng_dynamic_buffer_append(&payload->buffer, tracepoint->filter_expression, | |
146 | filter_expression_len); | |
147 | if (ret) { | |
148 | goto end; | |
149 | } | |
150 | ||
85b05318 JR |
151 | size_before_log_level_rule = payload->buffer.size; |
152 | ||
153 | ret = lttng_log_level_rule_serialize(tracepoint->log_level_rule, payload); | |
154 | if (ret < 0) { | |
155 | goto end; | |
156 | } | |
157 | ||
158 | header = (typeof(header)) ((char *) payload->buffer.data + header_offset); | |
159 | header->log_level_rule_len = | |
160 | payload->buffer.size - size_before_log_level_rule; | |
161 | ||
6d420eff JR |
162 | for (i = 0; i < exclusion_count; i++) { |
163 | size_t len; | |
164 | const char *exclusion; | |
165 | ||
166 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
167 | rule, i, &exclusion); | |
168 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
169 | ||
170 | len = strlen(exclusion) + 1; | |
171 | /* Append exclusion length, includes the null terminator. */ | |
172 | ret = lttng_dynamic_buffer_append( | |
173 | &payload->buffer, &len, sizeof(uint32_t)); | |
174 | if (ret) { | |
175 | goto end; | |
176 | } | |
177 | ||
178 | exclusions_appended_len += sizeof(uint32_t); | |
179 | ||
180 | /* Include the '\0' in the payload. */ | |
181 | ret = lttng_dynamic_buffer_append( | |
182 | &payload->buffer, exclusion, len); | |
183 | if (ret) { | |
184 | goto end; | |
185 | } | |
186 | ||
187 | exclusions_appended_len += len; | |
188 | } | |
189 | ||
190 | assert(exclusions_len == exclusions_appended_len); | |
191 | ||
192 | end: | |
193 | return ret; | |
194 | } | |
195 | ||
196 | static bool lttng_event_rule_tracepoint_is_equal( | |
197 | const struct lttng_event_rule *_a, | |
198 | const struct lttng_event_rule *_b) | |
199 | { | |
200 | int i; | |
201 | bool is_equal = false; | |
202 | struct lttng_event_rule_tracepoint *a, *b; | |
203 | unsigned int count_a, count_b; | |
204 | enum lttng_event_rule_status status; | |
205 | ||
206 | a = container_of(_a, struct lttng_event_rule_tracepoint, parent); | |
207 | b = container_of(_b, struct lttng_event_rule_tracepoint, parent); | |
208 | ||
209 | status = lttng_event_rule_tracepoint_get_exclusions_count(_a, &count_a); | |
210 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
211 | status = lttng_event_rule_tracepoint_get_exclusions_count(_b, &count_b); | |
212 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
213 | ||
214 | /* Quick checks. */ | |
215 | if (a->domain != b->domain) { | |
216 | goto end; | |
217 | } | |
218 | ||
219 | if (count_a != count_b) { | |
220 | goto end; | |
221 | } | |
222 | ||
223 | if (!!a->filter_expression != !!b->filter_expression) { | |
224 | goto end; | |
225 | } | |
226 | ||
227 | /* Long check. */ | |
228 | assert(a->pattern); | |
229 | assert(b->pattern); | |
230 | if (strcmp(a->pattern, b->pattern)) { | |
231 | goto end; | |
232 | } | |
233 | ||
234 | if (a->filter_expression && b->filter_expression) { | |
235 | if (strcmp(a->filter_expression, b->filter_expression)) { | |
236 | goto end; | |
237 | } | |
238 | } else if (!!a->filter_expression != !!b->filter_expression) { | |
239 | /* One is set; not the other. */ | |
240 | goto end; | |
241 | } | |
242 | ||
85b05318 JR |
243 | if (!lttng_log_level_rule_is_equal( |
244 | a->log_level_rule, b->log_level_rule)) { | |
6d420eff JR |
245 | goto end; |
246 | } | |
247 | ||
248 | for (i = 0; i < count_a; i++) { | |
249 | const char *exclusion_a, *exclusion_b; | |
250 | ||
251 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
252 | _a, i, &exclusion_a); | |
253 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
254 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
255 | _b, i, &exclusion_b); | |
256 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
257 | if (strcmp(exclusion_a, exclusion_b)) { | |
258 | goto end; | |
259 | } | |
260 | } | |
261 | ||
262 | is_equal = true; | |
263 | end: | |
264 | return is_equal; | |
265 | } | |
266 | ||
267 | /* | |
268 | * On success ret is 0; | |
269 | * | |
270 | * On error ret is negative. | |
271 | * | |
272 | * An event with NO loglevel and the name is * will return NULL. | |
273 | */ | |
274 | static int generate_agent_filter( | |
275 | const struct lttng_event_rule *rule, char **_agent_filter) | |
276 | { | |
277 | int err; | |
278 | int ret = 0; | |
279 | char *agent_filter = NULL; | |
280 | const char *pattern; | |
281 | const char *filter; | |
85b05318 | 282 | const struct lttng_log_level_rule *log_level_rule = NULL; |
6d420eff JR |
283 | enum lttng_event_rule_status status; |
284 | ||
285 | assert(rule); | |
286 | assert(_agent_filter); | |
287 | ||
288 | status = lttng_event_rule_tracepoint_get_pattern(rule, &pattern); | |
289 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
290 | ret = -1; | |
291 | goto end; | |
292 | } | |
293 | ||
294 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); | |
295 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
296 | filter = NULL; | |
297 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
298 | ret = -1; | |
299 | goto end; | |
300 | } | |
301 | ||
6d420eff JR |
302 | |
303 | /* Don't add filter for the '*' event. */ | |
304 | if (strcmp(pattern, "*") != 0) { | |
305 | if (filter) { | |
306 | err = asprintf(&agent_filter, | |
307 | "(%s) && (logger_name == \"%s\")", | |
308 | filter, pattern); | |
309 | } else { | |
310 | err = asprintf(&agent_filter, "logger_name == \"%s\"", | |
311 | pattern); | |
312 | } | |
313 | ||
314 | if (err < 0) { | |
315 | PERROR("Failed to format agent filter string"); | |
316 | ret = -1; | |
317 | goto end; | |
318 | } | |
319 | } | |
320 | ||
85b05318 JR |
321 | status = lttng_event_rule_tracepoint_get_log_level_rule( |
322 | rule, &log_level_rule); | |
323 | if (status == LTTNG_EVENT_RULE_STATUS_OK) { | |
324 | enum lttng_log_level_rule_status llr_status; | |
6d420eff | 325 | const char *op; |
85b05318 | 326 | int level; |
6d420eff | 327 | |
85b05318 JR |
328 | switch (lttng_log_level_rule_get_type(log_level_rule)) |
329 | { | |
330 | case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: | |
331 | llr_status = lttng_log_level_rule_exactly_get_level( | |
332 | log_level_rule, &level); | |
333 | op = "=="; | |
334 | break; | |
335 | case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: | |
336 | llr_status = lttng_log_level_rule_at_least_as_severe_as_get_level( | |
337 | log_level_rule, &level); | |
338 | op = ">="; | |
339 | break; | |
340 | default: | |
341 | abort(); | |
6d420eff JR |
342 | } |
343 | ||
85b05318 JR |
344 | if (llr_status != LTTNG_LOG_LEVEL_RULE_STATUS_OK) { |
345 | ret = -1; | |
346 | goto end; | |
6d420eff JR |
347 | } |
348 | ||
349 | if (filter || agent_filter) { | |
350 | char *new_filter; | |
351 | ||
352 | err = asprintf(&new_filter, | |
353 | "(%s) && (int_loglevel %s %d)", | |
354 | agent_filter ? agent_filter : filter, | |
85b05318 | 355 | op, level); |
6d420eff JR |
356 | if (agent_filter) { |
357 | free(agent_filter); | |
358 | } | |
359 | agent_filter = new_filter; | |
360 | } else { | |
361 | err = asprintf(&agent_filter, "int_loglevel %s %d", op, | |
85b05318 | 362 | level); |
6d420eff JR |
363 | } |
364 | ||
365 | if (err < 0) { | |
366 | PERROR("Failed to format agent filter string"); | |
367 | ret = -1; | |
368 | goto end; | |
369 | } | |
370 | } | |
371 | ||
372 | *_agent_filter = agent_filter; | |
373 | agent_filter = NULL; | |
374 | ||
375 | end: | |
376 | free(agent_filter); | |
377 | return ret; | |
378 | } | |
379 | ||
380 | static enum lttng_error_code | |
381 | lttng_event_rule_tracepoint_generate_filter_bytecode( | |
58daac01 JR |
382 | struct lttng_event_rule *rule, |
383 | const struct lttng_credentials *creds) | |
6d420eff JR |
384 | { |
385 | int ret; | |
386 | enum lttng_error_code ret_code; | |
387 | struct lttng_event_rule_tracepoint *tracepoint; | |
388 | enum lttng_domain_type domain_type; | |
389 | enum lttng_event_rule_status status; | |
390 | const char *filter; | |
2b00d462 | 391 | struct lttng_bytecode *bytecode = NULL; |
6d420eff JR |
392 | |
393 | assert(rule); | |
394 | ||
395 | tracepoint = container_of( | |
396 | rule, struct lttng_event_rule_tracepoint, parent); | |
397 | ||
398 | status = lttng_event_rule_tracepoint_get_filter(rule, &filter); | |
399 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
400 | filter = NULL; | |
401 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
402 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
403 | goto end; | |
404 | } | |
405 | ||
406 | if (filter && filter[0] == '\0') { | |
407 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
408 | goto error; | |
409 | } | |
410 | ||
411 | status = lttng_event_rule_tracepoint_get_domain_type( | |
412 | rule, &domain_type); | |
413 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
414 | ret_code = LTTNG_ERR_UNK; | |
415 | goto error; | |
416 | } | |
417 | ||
418 | switch (domain_type) { | |
419 | case LTTNG_DOMAIN_LOG4J: | |
420 | case LTTNG_DOMAIN_JUL: | |
421 | case LTTNG_DOMAIN_PYTHON: | |
422 | { | |
423 | char *agent_filter; | |
424 | ||
425 | ret = generate_agent_filter(rule, &agent_filter); | |
426 | if (ret) { | |
427 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
428 | goto error; | |
429 | } | |
430 | ||
431 | tracepoint->internal_filter.filter = agent_filter; | |
432 | break; | |
433 | } | |
434 | default: | |
435 | { | |
436 | if (filter) { | |
437 | tracepoint->internal_filter.filter = strdup(filter); | |
438 | if (tracepoint->internal_filter.filter == NULL) { | |
439 | ret_code = LTTNG_ERR_NOMEM; | |
440 | goto error; | |
441 | } | |
442 | } else { | |
443 | tracepoint->internal_filter.filter = NULL; | |
444 | } | |
445 | break; | |
446 | } | |
447 | } | |
448 | ||
449 | if (tracepoint->internal_filter.filter == NULL) { | |
450 | ret_code = LTTNG_OK; | |
451 | goto end; | |
452 | } | |
453 | ||
454 | ret = run_as_generate_filter_bytecode( | |
58daac01 | 455 | tracepoint->internal_filter.filter, creds, |
6d420eff JR |
456 | &bytecode); |
457 | if (ret) { | |
458 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
459 | goto end; | |
460 | } | |
461 | ||
462 | tracepoint->internal_filter.bytecode = bytecode; | |
463 | bytecode = NULL; | |
464 | ret_code = LTTNG_OK; | |
465 | ||
466 | error: | |
467 | end: | |
468 | free(bytecode); | |
469 | return ret_code; | |
470 | } | |
471 | ||
472 | static const char *lttng_event_rule_tracepoint_get_internal_filter( | |
473 | const struct lttng_event_rule *rule) | |
474 | { | |
475 | struct lttng_event_rule_tracepoint *tracepoint; | |
476 | ||
477 | assert(rule); | |
478 | tracepoint = container_of( | |
479 | rule, struct lttng_event_rule_tracepoint, parent); | |
480 | return tracepoint->internal_filter.filter; | |
481 | } | |
482 | ||
2b00d462 | 483 | static const struct lttng_bytecode * |
6d420eff JR |
484 | lttng_event_rule_tracepoint_get_internal_filter_bytecode( |
485 | const struct lttng_event_rule *rule) | |
486 | { | |
487 | struct lttng_event_rule_tracepoint *tracepoint; | |
488 | ||
489 | assert(rule); | |
490 | tracepoint = container_of( | |
491 | rule, struct lttng_event_rule_tracepoint, parent); | |
492 | return tracepoint->internal_filter.bytecode; | |
493 | } | |
494 | ||
993578ff | 495 | static enum lttng_event_rule_generate_exclusions_status |
6d420eff | 496 | lttng_event_rule_tracepoint_generate_exclusions( |
993578ff JR |
497 | const struct lttng_event_rule *rule, |
498 | struct lttng_event_exclusion **_exclusions) | |
6d420eff | 499 | { |
993578ff JR |
500 | unsigned int nb_exclusions = 0, i; |
501 | enum lttng_domain_type domain_type; | |
502 | struct lttng_event_exclusion *exclusions; | |
503 | enum lttng_event_rule_status event_rule_status; | |
504 | enum lttng_event_rule_generate_exclusions_status ret_status; | |
6d420eff | 505 | |
993578ff JR |
506 | assert(_exclusions); |
507 | ||
508 | event_rule_status = lttng_event_rule_tracepoint_get_domain_type( | |
509 | rule, &domain_type); | |
510 | assert(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); | |
6d420eff JR |
511 | |
512 | switch (domain_type) { | |
513 | case LTTNG_DOMAIN_KERNEL: | |
514 | case LTTNG_DOMAIN_JUL: | |
515 | case LTTNG_DOMAIN_LOG4J: | |
516 | case LTTNG_DOMAIN_PYTHON: | |
517 | /* Not supported. */ | |
993578ff JR |
518 | exclusions = NULL; |
519 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; | |
6d420eff JR |
520 | goto end; |
521 | case LTTNG_DOMAIN_UST: | |
522 | /* Exclusions supported. */ | |
523 | break; | |
524 | default: | |
993578ff | 525 | /* Unknown domain. */ |
6d420eff JR |
526 | abort(); |
527 | } | |
528 | ||
993578ff | 529 | event_rule_status = lttng_event_rule_tracepoint_get_exclusions_count( |
6d420eff | 530 | rule, &nb_exclusions); |
993578ff | 531 | assert(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); |
6d420eff JR |
532 | if (nb_exclusions == 0) { |
533 | /* Nothing to do. */ | |
993578ff JR |
534 | exclusions = NULL; |
535 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; | |
6d420eff JR |
536 | goto end; |
537 | } | |
538 | ||
993578ff JR |
539 | exclusions = zmalloc(sizeof(struct lttng_event_exclusion) + |
540 | (LTTNG_SYMBOL_NAME_LEN * nb_exclusions)); | |
541 | if (!exclusions) { | |
6d420eff | 542 | PERROR("Failed to allocate exclusions buffer"); |
993578ff | 543 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OUT_OF_MEMORY; |
6d420eff JR |
544 | goto end; |
545 | } | |
546 | ||
993578ff | 547 | exclusions->count = nb_exclusions; |
6d420eff | 548 | for (i = 0; i < nb_exclusions; i++) { |
993578ff JR |
549 | int copy_ret; |
550 | const char *exclusion_str; | |
551 | ||
552 | event_rule_status = | |
553 | lttng_event_rule_tracepoint_get_exclusion_at_index( | |
554 | rule, i, &exclusion_str); | |
555 | assert(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); | |
556 | ||
557 | copy_ret = lttng_strncpy(exclusions->names[i], exclusion_str, | |
558 | LTTNG_SYMBOL_NAME_LEN); | |
559 | if (copy_ret) { | |
560 | free(exclusions); | |
561 | exclusions = NULL; | |
562 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_ERROR; | |
563 | goto end; | |
564 | } | |
6d420eff JR |
565 | } |
566 | ||
993578ff JR |
567 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OK; |
568 | ||
6d420eff | 569 | end: |
993578ff JR |
570 | *_exclusions = exclusions; |
571 | return ret_status; | |
6d420eff JR |
572 | } |
573 | ||
574 | static void destroy_lttng_exclusions_element(void *ptr) | |
575 | { | |
576 | free(ptr); | |
577 | } | |
578 | ||
959e3c66 JR |
579 | static unsigned long lttng_event_rule_tracepoint_hash( |
580 | const struct lttng_event_rule *rule) | |
581 | { | |
582 | unsigned long hash; | |
583 | unsigned int i, exclusion_count; | |
584 | enum lttng_event_rule_status status; | |
585 | struct lttng_event_rule_tracepoint *tp_rule = | |
586 | container_of(rule, typeof(*tp_rule), parent); | |
587 | ||
588 | hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_TRACEPOINT, | |
589 | lttng_ht_seed); | |
590 | hash ^= hash_key_ulong((void *) tp_rule->domain, lttng_ht_seed); | |
591 | hash ^= hash_key_str(tp_rule->pattern, lttng_ht_seed); | |
592 | ||
593 | if (tp_rule->filter_expression) { | |
594 | hash ^= hash_key_str(tp_rule->filter_expression, lttng_ht_seed); | |
595 | } | |
596 | ||
85b05318 JR |
597 | if (tp_rule->log_level_rule) { |
598 | hash ^= lttng_log_level_rule_hash(tp_rule->log_level_rule); | |
959e3c66 JR |
599 | } |
600 | ||
601 | status = lttng_event_rule_tracepoint_get_exclusions_count(rule, | |
602 | &exclusion_count); | |
603 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
604 | ||
605 | for (i = 0; i < exclusion_count; i++) { | |
606 | const char *exclusion; | |
607 | ||
608 | status = lttng_event_rule_tracepoint_get_exclusion_at_index( | |
609 | rule, i, &exclusion); | |
610 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
611 | hash ^= hash_key_str(exclusion, lttng_ht_seed); | |
612 | } | |
613 | ||
614 | return hash; | |
615 | } | |
616 | ||
44760c20 JR |
617 | static struct lttng_event *lttng_event_rule_tracepoint_generate_lttng_event( |
618 | const struct lttng_event_rule *rule) | |
619 | { | |
620 | int ret; | |
621 | const struct lttng_event_rule_tracepoint *tracepoint; | |
622 | struct lttng_event *local_event = NULL; | |
623 | struct lttng_event *event = NULL; | |
85b05318 JR |
624 | enum lttng_loglevel_type loglevel_type; |
625 | int loglevel_value = 0; | |
626 | enum lttng_event_rule_status status; | |
627 | const struct lttng_log_level_rule *log_level_rule; | |
44760c20 JR |
628 | |
629 | tracepoint = container_of( | |
630 | rule, const struct lttng_event_rule_tracepoint, parent); | |
631 | ||
632 | local_event = zmalloc(sizeof(*local_event)); | |
633 | if (!local_event) { | |
634 | goto error; | |
635 | } | |
636 | ||
637 | local_event->type = LTTNG_EVENT_TRACEPOINT; | |
638 | ret = lttng_strncpy(local_event->name, tracepoint->pattern, | |
639 | sizeof(local_event->name)); | |
640 | if (ret) { | |
641 | ERR("Truncation occurred when copying event rule pattern to `lttng_event` structure: pattern = '%s'", | |
642 | tracepoint->pattern); | |
643 | goto error; | |
644 | } | |
645 | ||
85b05318 JR |
646 | |
647 | /* Map the log level rule to an equivalent lttng_loglevel. */ | |
648 | status = lttng_event_rule_tracepoint_get_log_level_rule( | |
649 | rule, &log_level_rule); | |
650 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
651 | loglevel_type = LTTNG_EVENT_LOGLEVEL_ALL; | |
652 | loglevel_value = 0; | |
653 | } else if (status == LTTNG_EVENT_RULE_STATUS_OK) { | |
654 | enum lttng_log_level_rule_status llr_status; | |
655 | ||
656 | switch (lttng_log_level_rule_get_type(log_level_rule)) { | |
657 | case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: | |
658 | llr_status = lttng_log_level_rule_exactly_get_level( | |
659 | log_level_rule, &loglevel_value); | |
660 | loglevel_type = LTTNG_EVENT_LOGLEVEL_SINGLE; | |
661 | break; | |
662 | case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: | |
663 | llr_status = lttng_log_level_rule_at_least_as_severe_as_get_level( | |
664 | log_level_rule, &loglevel_value); | |
665 | loglevel_type = LTTNG_EVENT_LOGLEVEL_RANGE; | |
666 | break; | |
667 | default: | |
668 | abort(); | |
669 | break; | |
670 | } | |
671 | ||
672 | if (llr_status != LTTNG_LOG_LEVEL_RULE_STATUS_OK) { | |
673 | goto error; | |
674 | } | |
675 | } else { | |
676 | goto error; | |
677 | } | |
678 | ||
679 | local_event->loglevel_type = loglevel_type; | |
680 | local_event->loglevel = loglevel_value; | |
44760c20 JR |
681 | |
682 | event = local_event; | |
683 | local_event = NULL; | |
684 | error: | |
685 | free(local_event); | |
686 | return event; | |
687 | } | |
688 | ||
6d420eff JR |
689 | struct lttng_event_rule *lttng_event_rule_tracepoint_create( |
690 | enum lttng_domain_type domain_type) | |
691 | { | |
692 | struct lttng_event_rule *rule = NULL; | |
693 | struct lttng_event_rule_tracepoint *tp_rule; | |
cb6096aa | 694 | enum lttng_event_rule_status status; |
6d420eff JR |
695 | |
696 | if (domain_type == LTTNG_DOMAIN_NONE) { | |
697 | goto end; | |
698 | } | |
699 | ||
700 | tp_rule = zmalloc(sizeof(struct lttng_event_rule_tracepoint)); | |
701 | if (!tp_rule) { | |
702 | goto end; | |
703 | } | |
704 | ||
705 | rule = &tp_rule->parent; | |
706 | lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_TRACEPOINT); | |
707 | tp_rule->parent.validate = lttng_event_rule_tracepoint_validate; | |
708 | tp_rule->parent.serialize = lttng_event_rule_tracepoint_serialize; | |
709 | tp_rule->parent.equal = lttng_event_rule_tracepoint_is_equal; | |
710 | tp_rule->parent.destroy = lttng_event_rule_tracepoint_destroy; | |
711 | tp_rule->parent.generate_filter_bytecode = | |
712 | lttng_event_rule_tracepoint_generate_filter_bytecode; | |
713 | tp_rule->parent.get_filter = | |
714 | lttng_event_rule_tracepoint_get_internal_filter; | |
715 | tp_rule->parent.get_filter_bytecode = | |
716 | lttng_event_rule_tracepoint_get_internal_filter_bytecode; | |
717 | tp_rule->parent.generate_exclusions = | |
718 | lttng_event_rule_tracepoint_generate_exclusions; | |
959e3c66 | 719 | tp_rule->parent.hash = lttng_event_rule_tracepoint_hash; |
44760c20 JR |
720 | tp_rule->parent.generate_lttng_event = |
721 | lttng_event_rule_tracepoint_generate_lttng_event; | |
6d420eff JR |
722 | |
723 | tp_rule->domain = domain_type; | |
85b05318 | 724 | tp_rule->log_level_rule = NULL; |
6d420eff JR |
725 | |
726 | lttng_dynamic_pointer_array_init(&tp_rule->exclusions, | |
727 | destroy_lttng_exclusions_element); | |
cb6096aa JR |
728 | |
729 | /* Default pattern is '*'. */ | |
730 | status = lttng_event_rule_tracepoint_set_pattern(rule, "*"); | |
731 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
732 | lttng_event_rule_destroy(rule); | |
733 | rule = NULL; | |
734 | } | |
735 | ||
6d420eff JR |
736 | end: |
737 | return rule; | |
738 | } | |
739 | ||
740 | LTTNG_HIDDEN | |
741 | ssize_t lttng_event_rule_tracepoint_create_from_payload( | |
742 | struct lttng_payload_view *view, | |
743 | struct lttng_event_rule **_event_rule) | |
744 | { | |
745 | ssize_t ret, offset = 0; | |
746 | int i; | |
747 | enum lttng_event_rule_status status; | |
748 | enum lttng_domain_type domain_type; | |
6d420eff JR |
749 | const struct lttng_event_rule_tracepoint_comm *tracepoint_comm; |
750 | const char *pattern; | |
751 | const char *filter_expression = NULL; | |
752 | const char **exclusions = NULL; | |
753 | const uint32_t *exclusion_len; | |
754 | const char *exclusion; | |
755 | struct lttng_buffer_view current_buffer_view; | |
756 | struct lttng_event_rule *rule = NULL; | |
85b05318 | 757 | struct lttng_log_level_rule *log_level_rule = NULL; |
6d420eff JR |
758 | |
759 | if (!_event_rule) { | |
760 | ret = -1; | |
761 | goto end; | |
762 | } | |
763 | ||
3e6e0df2 JG |
764 | current_buffer_view = lttng_buffer_view_from_view( |
765 | &view->buffer, offset, sizeof(*tracepoint_comm)); | |
766 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
6d420eff JR |
767 | ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header."); |
768 | ret = -1; | |
769 | goto end; | |
770 | } | |
771 | ||
6d420eff JR |
772 | tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data; |
773 | ||
6d420eff JR |
774 | if (tracepoint_comm->domain_type <= LTTNG_DOMAIN_NONE || |
775 | tracepoint_comm->domain_type > LTTNG_DOMAIN_PYTHON) { | |
776 | /* Invalid domain value. */ | |
777 | ERR("Invalid domain type value (%i) found in tracepoint_comm buffer.", | |
778 | (int) tracepoint_comm->domain_type); | |
779 | ret = -1; | |
780 | goto end; | |
781 | } | |
782 | ||
783 | domain_type = (enum lttng_domain_type) tracepoint_comm->domain_type; | |
784 | rule = lttng_event_rule_tracepoint_create(domain_type); | |
785 | if (!rule) { | |
786 | ERR("Failed to create event rule tracepoint."); | |
787 | ret = -1; | |
788 | goto end; | |
789 | } | |
790 | ||
6d420eff JR |
791 | /* Skip to payload. */ |
792 | offset += current_buffer_view.size; | |
793 | ||
794 | /* Map the pattern. */ | |
795 | current_buffer_view = lttng_buffer_view_from_view( | |
796 | &view->buffer, offset, tracepoint_comm->pattern_len); | |
3e6e0df2 JG |
797 | |
798 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
6d420eff JR |
799 | ret = -1; |
800 | goto end; | |
801 | } | |
802 | ||
3e6e0df2 | 803 | pattern = current_buffer_view.data; |
6d420eff JR |
804 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, |
805 | tracepoint_comm->pattern_len)) { | |
806 | ret = -1; | |
807 | goto end; | |
808 | } | |
809 | ||
810 | /* Skip after the pattern. */ | |
811 | offset += tracepoint_comm->pattern_len; | |
812 | ||
813 | if (!tracepoint_comm->filter_expression_len) { | |
814 | goto skip_filter_expression; | |
815 | } | |
816 | ||
817 | /* Map the filter_expression. */ | |
818 | current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, | |
819 | tracepoint_comm->filter_expression_len); | |
3e6e0df2 | 820 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
6d420eff JR |
821 | ret = -1; |
822 | goto end; | |
823 | } | |
824 | ||
3e6e0df2 | 825 | filter_expression = current_buffer_view.data; |
6d420eff JR |
826 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, |
827 | filter_expression, | |
828 | tracepoint_comm->filter_expression_len)) { | |
829 | ret = -1; | |
830 | goto end; | |
831 | } | |
832 | ||
833 | /* Skip after the pattern. */ | |
834 | offset += tracepoint_comm->filter_expression_len; | |
835 | ||
836 | skip_filter_expression: | |
85b05318 JR |
837 | if (!tracepoint_comm->log_level_rule_len) { |
838 | goto skip_log_level_rule; | |
839 | } | |
840 | ||
841 | { | |
842 | /* Map the log level rule. */ | |
843 | struct lttng_payload_view current_payload_view = | |
844 | lttng_payload_view_from_view(view, offset, | |
845 | tracepoint_comm->log_level_rule_len); | |
846 | ||
847 | ret = lttng_log_level_rule_create_from_payload( | |
848 | ¤t_payload_view, &log_level_rule); | |
849 | if (ret < 0) { | |
850 | ret = -1; | |
851 | goto end; | |
852 | } | |
853 | ||
854 | assert(ret == tracepoint_comm->log_level_rule_len); | |
855 | } | |
856 | ||
857 | /* Skip after the log level rule. */ | |
858 | offset += tracepoint_comm->log_level_rule_len; | |
859 | ||
860 | skip_log_level_rule: | |
6d420eff JR |
861 | for (i = 0; i < tracepoint_comm->exclusions_count; i++) { |
862 | current_buffer_view = lttng_buffer_view_from_view( | |
863 | &view->buffer, offset, sizeof(*exclusion_len)); | |
3e6e0df2 | 864 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
6d420eff JR |
865 | ret = -1; |
866 | goto end; | |
867 | } | |
868 | ||
3e6e0df2 | 869 | exclusion_len = (typeof(exclusion_len)) current_buffer_view.data; |
6d420eff | 870 | offset += sizeof(*exclusion_len); |
3e6e0df2 | 871 | |
6d420eff JR |
872 | current_buffer_view = lttng_buffer_view_from_view( |
873 | &view->buffer, offset, *exclusion_len); | |
3e6e0df2 JG |
874 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
875 | ret = -1; | |
876 | goto end; | |
877 | } | |
878 | ||
6d420eff JR |
879 | exclusion = current_buffer_view.data; |
880 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, | |
881 | exclusion, *exclusion_len)) { | |
882 | ret = -1; | |
883 | goto end; | |
884 | } | |
885 | ||
886 | status = lttng_event_rule_tracepoint_add_exclusion(rule, exclusion); | |
887 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
888 | ERR("Failed to add event rule tracepoint exclusion \"%s\".", | |
889 | exclusion); | |
890 | ret = -1; | |
891 | goto end; | |
892 | } | |
893 | ||
894 | /* Skip to next exclusion. */ | |
895 | offset += *exclusion_len; | |
896 | } | |
897 | ||
898 | status = lttng_event_rule_tracepoint_set_pattern(rule, pattern); | |
899 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
900 | ERR("Failed to set event rule tracepoint pattern."); | |
901 | ret = -1; | |
902 | goto end; | |
903 | } | |
904 | ||
905 | if (filter_expression) { | |
906 | status = lttng_event_rule_tracepoint_set_filter( | |
907 | rule, filter_expression); | |
908 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
909 | ERR("Failed to set event rule tracepoint pattern."); | |
910 | ret = -1; | |
911 | goto end; | |
912 | } | |
913 | } | |
914 | ||
85b05318 JR |
915 | if (log_level_rule) { |
916 | status = lttng_event_rule_tracepoint_set_log_level_rule( | |
917 | rule, log_level_rule); | |
918 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
919 | ERR("Failed to set event rule tracepoint log level rule."); | |
920 | ret = -1; | |
921 | goto end; | |
922 | } | |
923 | } | |
924 | ||
6d420eff JR |
925 | *_event_rule = rule; |
926 | rule = NULL; | |
927 | ret = offset; | |
928 | end: | |
929 | free(exclusions); | |
85b05318 | 930 | lttng_log_level_rule_destroy(log_level_rule); |
6d420eff JR |
931 | lttng_event_rule_destroy(rule); |
932 | return ret; | |
933 | } | |
934 | ||
935 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_pattern( | |
936 | struct lttng_event_rule *rule, const char *pattern) | |
937 | { | |
938 | char *pattern_copy = NULL; | |
939 | struct lttng_event_rule_tracepoint *tracepoint; | |
940 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
941 | ||
942 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern || | |
943 | strlen(pattern) == 0) { | |
944 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
945 | goto end; | |
946 | } | |
947 | ||
948 | tracepoint = container_of( | |
949 | rule, struct lttng_event_rule_tracepoint, parent); | |
950 | pattern_copy = strdup(pattern); | |
951 | if (!pattern_copy) { | |
952 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
953 | goto end; | |
954 | } | |
955 | ||
40fd2ccf JR |
956 | /* Normalize the pattern. */ |
957 | strutils_normalize_star_glob_pattern(pattern_copy); | |
958 | ||
6d420eff JR |
959 | free(tracepoint->pattern); |
960 | ||
961 | tracepoint->pattern = pattern_copy; | |
962 | pattern_copy = NULL; | |
963 | end: | |
964 | return status; | |
965 | } | |
966 | ||
967 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_pattern( | |
968 | const struct lttng_event_rule *rule, const char **pattern) | |
969 | { | |
970 | struct lttng_event_rule_tracepoint *tracepoint; | |
971 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
972 | ||
973 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !pattern) { | |
974 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
975 | goto end; | |
976 | } | |
977 | ||
978 | tracepoint = container_of( | |
979 | rule, struct lttng_event_rule_tracepoint, parent); | |
980 | if (!tracepoint->pattern) { | |
981 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
982 | goto end; | |
983 | } | |
984 | ||
985 | *pattern = tracepoint->pattern; | |
986 | end: | |
987 | return status; | |
988 | } | |
989 | ||
990 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_domain_type( | |
991 | const struct lttng_event_rule *rule, | |
992 | enum lttng_domain_type *type) | |
993 | { | |
994 | struct lttng_event_rule_tracepoint *tracepoint; | |
995 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
996 | ||
997 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !type) { | |
998 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
999 | goto end; | |
1000 | } | |
1001 | ||
1002 | tracepoint = container_of( | |
1003 | rule, struct lttng_event_rule_tracepoint, parent); | |
1004 | *type = tracepoint->domain; | |
1005 | end: | |
1006 | return status; | |
1007 | } | |
1008 | ||
1009 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_filter( | |
1010 | struct lttng_event_rule *rule, const char *expression) | |
1011 | { | |
1012 | char *expression_copy = NULL; | |
1013 | struct lttng_event_rule_tracepoint *tracepoint; | |
1014 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1015 | ||
1016 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression || | |
1017 | strlen(expression) == 0) { | |
1018 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1019 | goto end; | |
1020 | } | |
1021 | ||
1022 | tracepoint = container_of( | |
1023 | rule, struct lttng_event_rule_tracepoint, parent); | |
1024 | expression_copy = strdup(expression); | |
1025 | if (!expression_copy) { | |
1026 | PERROR("Failed to copy filter expression"); | |
1027 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1028 | goto end; | |
1029 | } | |
1030 | ||
1031 | if (tracepoint->filter_expression) { | |
1032 | free(tracepoint->filter_expression); | |
1033 | } | |
1034 | ||
1035 | tracepoint->filter_expression = expression_copy; | |
1036 | expression_copy = NULL; | |
1037 | end: | |
1038 | return status; | |
1039 | } | |
1040 | ||
1041 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_filter( | |
1042 | const struct lttng_event_rule *rule, const char **expression) | |
1043 | { | |
1044 | struct lttng_event_rule_tracepoint *tracepoint; | |
1045 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1046 | ||
1047 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !expression) { | |
1048 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1049 | goto end; | |
1050 | } | |
1051 | ||
1052 | tracepoint = container_of( | |
1053 | rule, struct lttng_event_rule_tracepoint, parent); | |
1054 | if (!tracepoint->filter_expression) { | |
1055 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
1056 | goto end; | |
1057 | } | |
1058 | ||
1059 | *expression = tracepoint->filter_expression; | |
1060 | end: | |
1061 | return status; | |
1062 | } | |
1063 | ||
85b05318 JR |
1064 | static bool log_level_rule_valid(const struct lttng_log_level_rule *rule, |
1065 | enum lttng_domain_type domain) | |
6d420eff JR |
1066 | { |
1067 | bool valid = false; | |
85b05318 JR |
1068 | enum lttng_log_level_rule_status status; |
1069 | int level; | |
1070 | ||
1071 | switch (lttng_log_level_rule_get_type(rule)) { | |
1072 | case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: | |
1073 | status = lttng_log_level_rule_exactly_get_level(rule, &level); | |
1074 | break; | |
1075 | case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: | |
1076 | status = lttng_log_level_rule_at_least_as_severe_as_get_level( | |
1077 | rule, &level); | |
1078 | break; | |
1079 | default: | |
1080 | abort(); | |
1081 | } | |
1082 | ||
1083 | assert(status == LTTNG_LOG_LEVEL_RULE_STATUS_OK); | |
6d420eff JR |
1084 | |
1085 | switch (domain) { | |
1086 | case LTTNG_DOMAIN_KERNEL: | |
85b05318 JR |
1087 | valid = false; |
1088 | break; | |
6d420eff JR |
1089 | case LTTNG_DOMAIN_UST: |
1090 | if (level < LTTNG_LOGLEVEL_EMERG) { | |
1091 | /* Invalid. */ | |
1092 | goto end; | |
1093 | } | |
1094 | if (level > LTTNG_LOGLEVEL_DEBUG) { | |
1095 | /* Invalid. */ | |
1096 | goto end; | |
1097 | } | |
1098 | ||
1099 | valid = true; | |
1100 | break; | |
1101 | case LTTNG_DOMAIN_JUL: | |
1102 | case LTTNG_DOMAIN_LOG4J: | |
1103 | case LTTNG_DOMAIN_PYTHON: | |
1104 | /* | |
1105 | * For both JUL and LOG4J custom log level are possible and can | |
85b05318 JR |
1106 | * span the entire int32 range. |
1107 | * | |
6d420eff JR |
1108 | * For python, custom log level are possible, it is not clear if |
1109 | * negative value are accepted (NOTSET == 0) but the source code | |
85b05318 | 1110 | * validates against the int type implying that negative values |
6d420eff JR |
1111 | * are accepted. |
1112 | */ | |
1113 | valid = true; | |
1114 | goto end; | |
6d420eff JR |
1115 | case LTTNG_DOMAIN_NONE: |
1116 | default: | |
1117 | abort(); | |
1118 | } | |
1119 | ||
1120 | end: | |
1121 | return valid; | |
1122 | } | |
1123 | ||
2222db74 JG |
1124 | static bool domain_supports_log_levels(enum lttng_domain_type domain) |
1125 | { | |
1126 | bool supported; | |
1127 | ||
1128 | switch (domain) { | |
1129 | case LTTNG_DOMAIN_KERNEL: | |
1130 | supported = false; | |
1131 | break; | |
1132 | case LTTNG_DOMAIN_UST: | |
1133 | case LTTNG_DOMAIN_JUL: | |
1134 | case LTTNG_DOMAIN_LOG4J: | |
1135 | case LTTNG_DOMAIN_PYTHON: | |
1136 | supported = true; | |
1137 | break; | |
1138 | default: | |
1139 | abort(); | |
1140 | } | |
1141 | ||
1142 | return supported; | |
1143 | } | |
1144 | ||
85b05318 JR |
1145 | enum lttng_event_rule_status lttng_event_rule_tracepoint_set_log_level_rule( |
1146 | struct lttng_event_rule *rule, | |
1147 | const struct lttng_log_level_rule *log_level_rule) | |
6d420eff JR |
1148 | { |
1149 | struct lttng_event_rule_tracepoint *tracepoint; | |
1150 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
85b05318 | 1151 | struct lttng_log_level_rule *copy = NULL; |
6d420eff JR |
1152 | |
1153 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule)) { | |
1154 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1155 | goto end; | |
1156 | } | |
1157 | ||
1158 | tracepoint = container_of( | |
1159 | rule, struct lttng_event_rule_tracepoint, parent); | |
1160 | ||
2222db74 JG |
1161 | if (!domain_supports_log_levels(tracepoint->domain)) { |
1162 | status = LTTNG_EVENT_RULE_STATUS_UNSUPPORTED; | |
1163 | goto end; | |
1164 | } | |
1165 | ||
85b05318 | 1166 | if (!log_level_rule_valid(log_level_rule, tracepoint->domain)) { |
6d420eff JR |
1167 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
1168 | goto end; | |
1169 | } | |
1170 | ||
85b05318 JR |
1171 | copy = lttng_log_level_rule_copy(log_level_rule); |
1172 | if (copy == NULL) { | |
1173 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
6d420eff JR |
1174 | goto end; |
1175 | } | |
1176 | ||
85b05318 JR |
1177 | if (tracepoint->log_level_rule) { |
1178 | lttng_log_level_rule_destroy(tracepoint->log_level_rule); | |
6d420eff JR |
1179 | } |
1180 | ||
85b05318 | 1181 | tracepoint->log_level_rule = copy; |
6d420eff | 1182 | |
6d420eff JR |
1183 | end: |
1184 | return status; | |
1185 | } | |
1186 | ||
85b05318 | 1187 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_log_level_rule( |
6d420eff | 1188 | const struct lttng_event_rule *rule, |
85b05318 JR |
1189 | const struct lttng_log_level_rule **log_level_rule |
1190 | ) | |
6d420eff JR |
1191 | { |
1192 | struct lttng_event_rule_tracepoint *tracepoint; | |
1193 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1194 | ||
85b05318 | 1195 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !log_level_rule) { |
6d420eff JR |
1196 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
1197 | goto end; | |
1198 | } | |
1199 | ||
1200 | tracepoint = container_of( | |
1201 | rule, struct lttng_event_rule_tracepoint, parent); | |
85b05318 | 1202 | if (tracepoint->log_level_rule == NULL) { |
6d420eff JR |
1203 | status = LTTNG_EVENT_RULE_STATUS_UNSET; |
1204 | goto end; | |
1205 | } | |
1206 | ||
85b05318 | 1207 | *log_level_rule = tracepoint->log_level_rule; |
6d420eff JR |
1208 | end: |
1209 | return status; | |
1210 | } | |
1211 | ||
1212 | enum lttng_event_rule_status lttng_event_rule_tracepoint_add_exclusion( | |
1213 | struct lttng_event_rule *rule, | |
1214 | const char *exclusion) | |
1215 | { | |
1216 | int ret; | |
1217 | char *exclusion_copy = NULL; | |
1218 | struct lttng_event_rule_tracepoint *tracepoint; | |
1219 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1220 | enum lttng_domain_type domain_type; | |
1221 | ||
1222 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || | |
1223 | !exclusion) { | |
1224 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1225 | goto end; | |
1226 | } | |
1227 | ||
1228 | tracepoint = container_of( | |
1229 | rule, struct lttng_event_rule_tracepoint, parent); | |
1230 | ||
1231 | status = lttng_event_rule_tracepoint_get_domain_type( | |
1232 | rule, &domain_type); | |
1233 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
1234 | goto end; | |
1235 | } | |
1236 | ||
1237 | switch (domain_type) { | |
1238 | case LTTNG_DOMAIN_KERNEL: | |
1239 | case LTTNG_DOMAIN_JUL: | |
1240 | case LTTNG_DOMAIN_LOG4J: | |
1241 | case LTTNG_DOMAIN_PYTHON: | |
1242 | status = LTTNG_EVENT_RULE_STATUS_UNSUPPORTED; | |
1243 | goto end; | |
1244 | case LTTNG_DOMAIN_UST: | |
1245 | /* Exclusions supported. */ | |
1246 | break; | |
1247 | default: | |
1248 | abort(); | |
1249 | } | |
1250 | ||
1251 | if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) { | |
1252 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1253 | goto end; | |
1254 | } | |
1255 | ||
1256 | exclusion_copy = strdup(exclusion); | |
1257 | if (!exclusion_copy) { | |
1258 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1259 | goto end; | |
1260 | } | |
1261 | ||
1262 | ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions, | |
1263 | exclusion_copy); | |
1264 | if (ret < 0) { | |
1265 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
1266 | goto end; | |
1267 | } | |
1268 | ||
1269 | exclusion_copy = NULL; | |
1270 | end: | |
1271 | free(exclusion_copy); | |
1272 | return status; | |
1273 | } | |
1274 | ||
1275 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusions_count( | |
1276 | const struct lttng_event_rule *rule, unsigned int *count) | |
1277 | { | |
1278 | struct lttng_event_rule_tracepoint *tracepoint; | |
1279 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1280 | ||
1281 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !count) { | |
1282 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1283 | goto end; | |
1284 | } | |
1285 | ||
1286 | tracepoint = container_of( | |
1287 | rule, struct lttng_event_rule_tracepoint, parent); | |
1288 | *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions); | |
1289 | end: | |
1290 | return status; | |
1291 | } | |
1292 | ||
1293 | enum lttng_event_rule_status lttng_event_rule_tracepoint_get_exclusion_at_index( | |
1294 | const struct lttng_event_rule *rule, | |
1295 | unsigned int index, | |
1296 | const char **exclusion) | |
1297 | { | |
1298 | unsigned int count; | |
1299 | struct lttng_event_rule_tracepoint *tracepoint; | |
1300 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1301 | ||
1302 | if (!rule || !IS_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { | |
1303 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1304 | goto end; | |
1305 | } | |
1306 | ||
1307 | tracepoint = container_of( | |
1308 | rule, struct lttng_event_rule_tracepoint, parent); | |
1309 | if (lttng_event_rule_tracepoint_get_exclusions_count(rule, &count) != | |
1310 | LTTNG_EVENT_RULE_STATUS_OK) { | |
1311 | goto end; | |
1312 | } | |
1313 | ||
1314 | if (index >= count) { | |
1315 | goto end; | |
1316 | } | |
1317 | ||
1318 | *exclusion = lttng_dynamic_pointer_array_get_pointer( | |
1319 | &tracepoint->exclusions, index); | |
1320 | end: | |
1321 | return status; | |
1322 | } |