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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> | |
28ab034a | 19 | |
c9e313bc SM |
20 | #include <lttng/event-rule/event-rule-internal.hpp> |
21 | #include <lttng/event-rule/user-tracepoint-internal.hpp> | |
0a23a07d | 22 | #include <lttng/event.h> |
6a751b95 | 23 | #include <lttng/log-level-rule.h> |
0a23a07d JR |
24 | |
25 | #define IS_USER_TRACEPOINT_EVENT_RULE(rule) \ | |
26 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT) | |
27 | ||
28 | static void lttng_event_rule_user_tracepoint_destroy(struct lttng_event_rule *rule) | |
29 | { | |
30 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
31 | ||
cd9adb8b | 32 | if (rule == nullptr) { |
0a23a07d JR |
33 | return; |
34 | } | |
35 | ||
28ab034a | 36 | tracepoint = lttng::utils::container_of(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 | ||
28ab034a | 47 | static bool lttng_event_rule_user_tracepoint_validate(const struct lttng_event_rule *rule) |
0a23a07d JR |
48 | { |
49 | bool valid = false; | |
50 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
51 | ||
52 | if (!rule) { | |
53 | goto end; | |
54 | } | |
55 | ||
28ab034a | 56 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
57 | |
58 | /* Required field. */ | |
59 | if (!tracepoint->pattern) { | |
60 | ERR("Invalid user tracepoint event rule: a pattern must be set."); | |
61 | goto end; | |
62 | } | |
63 | ||
64 | valid = true; | |
65 | end: | |
66 | return valid; | |
67 | } | |
68 | ||
28ab034a JG |
69 | static int lttng_event_rule_user_tracepoint_serialize(const struct lttng_event_rule *rule, |
70 | struct lttng_payload *payload) | |
0a23a07d JR |
71 | { |
72 | int ret, i; | |
73 | size_t pattern_len, filter_expression_len, exclusions_len, header_offset; | |
74 | size_t size_before_log_level_rule; | |
75 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
76 | struct lttng_event_rule_user_tracepoint_comm tracepoint_comm; | |
77 | enum lttng_event_rule_status status; | |
78 | unsigned int exclusion_count; | |
79 | size_t exclusions_appended_len = 0; | |
80 | struct lttng_event_rule_user_tracepoint_comm *header; | |
81 | ||
82 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule)) { | |
83 | ret = -1; | |
84 | goto end; | |
85 | } | |
86 | ||
87 | header_offset = payload->buffer.size; | |
88 | ||
89 | DBG("Serializing user tracepoint event rule."); | |
28ab034a | 90 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d | 91 | |
28ab034a JG |
92 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( |
93 | rule, &exclusion_count); | |
a0377dfe | 94 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
95 | |
96 | pattern_len = strlen(tracepoint->pattern) + 1; | |
97 | ||
cd9adb8b | 98 | if (tracepoint->filter_expression != nullptr) { |
28ab034a | 99 | filter_expression_len = strlen(tracepoint->filter_expression) + 1; |
0a23a07d JR |
100 | } else { |
101 | filter_expression_len = 0; | |
102 | } | |
103 | ||
104 | exclusions_len = 0; | |
105 | for (i = 0; i < exclusion_count; i++) { | |
106 | const char *exclusion; | |
107 | ||
108 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 109 | rule, i, &exclusion); |
a0377dfe | 110 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
111 | |
112 | /* Length field. */ | |
113 | exclusions_len += sizeof(uint32_t); | |
114 | /* Payload (null terminated). */ | |
115 | exclusions_len += strlen(exclusion) + 1; | |
116 | } | |
117 | ||
118 | tracepoint_comm.pattern_len = pattern_len; | |
119 | tracepoint_comm.filter_expression_len = filter_expression_len; | |
120 | tracepoint_comm.exclusions_count = exclusion_count; | |
121 | tracepoint_comm.exclusions_len = exclusions_len; | |
122 | ||
28ab034a JG |
123 | ret = lttng_dynamic_buffer_append( |
124 | &payload->buffer, &tracepoint_comm, sizeof(tracepoint_comm)); | |
0a23a07d JR |
125 | if (ret) { |
126 | goto end; | |
127 | } | |
128 | ||
28ab034a | 129 | ret = lttng_dynamic_buffer_append(&payload->buffer, tracepoint->pattern, pattern_len); |
0a23a07d JR |
130 | if (ret) { |
131 | goto end; | |
132 | } | |
133 | ||
28ab034a JG |
134 | ret = lttng_dynamic_buffer_append( |
135 | &payload->buffer, tracepoint->filter_expression, filter_expression_len); | |
0a23a07d JR |
136 | if (ret) { |
137 | goto end; | |
138 | } | |
139 | ||
140 | size_before_log_level_rule = payload->buffer.size; | |
141 | ||
142 | ret = lttng_log_level_rule_serialize(tracepoint->log_level_rule, payload); | |
143 | if (ret < 0) { | |
144 | goto end; | |
145 | } | |
146 | ||
147 | header = (typeof(header)) ((char *) payload->buffer.data + header_offset); | |
28ab034a | 148 | header->log_level_rule_len = payload->buffer.size - size_before_log_level_rule; |
0a23a07d JR |
149 | |
150 | for (i = 0; i < exclusion_count; i++) { | |
151 | size_t len; | |
7cb80419 | 152 | uint32_t serialized_len; |
0a23a07d JR |
153 | const char *exclusion; |
154 | ||
155 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 156 | rule, i, &exclusion); |
a0377dfe | 157 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
158 | |
159 | len = strlen(exclusion) + 1; | |
7cb80419 MJ |
160 | |
161 | serialized_len = len; | |
0a23a07d | 162 | /* Append exclusion length, includes the null terminator. */ |
28f23191 JG |
163 | ret = lttng_dynamic_buffer_append( |
164 | &payload->buffer, &serialized_len, sizeof(serialized_len)); | |
0a23a07d JR |
165 | if (ret) { |
166 | goto end; | |
167 | } | |
168 | ||
169 | exclusions_appended_len += sizeof(uint32_t); | |
170 | ||
171 | /* Include the '\0' in the payload. */ | |
28ab034a | 172 | ret = lttng_dynamic_buffer_append(&payload->buffer, exclusion, len); |
0a23a07d JR |
173 | if (ret) { |
174 | goto end; | |
175 | } | |
176 | ||
177 | exclusions_appended_len += len; | |
178 | } | |
179 | ||
a0377dfe | 180 | LTTNG_ASSERT(exclusions_len == exclusions_appended_len); |
0a23a07d JR |
181 | |
182 | end: | |
183 | return ret; | |
184 | } | |
185 | ||
28ab034a JG |
186 | static bool lttng_event_rule_user_tracepoint_is_equal(const struct lttng_event_rule *_a, |
187 | const struct lttng_event_rule *_b) | |
0a23a07d JR |
188 | { |
189 | int i; | |
190 | bool is_equal = false; | |
191 | struct lttng_event_rule_user_tracepoint *a, *b; | |
192 | unsigned int count_a, count_b; | |
193 | enum lttng_event_rule_status status; | |
194 | ||
0114db0e JG |
195 | a = lttng::utils::container_of(_a, <tng_event_rule_user_tracepoint::parent); |
196 | b = lttng::utils::container_of(_b, <tng_event_rule_user_tracepoint::parent); | |
0a23a07d JR |
197 | |
198 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(_a, &count_a); | |
a0377dfe | 199 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d | 200 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(_b, &count_b); |
a0377dfe | 201 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
202 | |
203 | /* Quick checks. */ | |
204 | if (count_a != count_b) { | |
205 | goto end; | |
206 | } | |
207 | ||
208 | if (!!a->filter_expression != !!b->filter_expression) { | |
209 | goto end; | |
210 | } | |
211 | ||
212 | /* Long check. */ | |
a0377dfe FD |
213 | LTTNG_ASSERT(a->pattern); |
214 | LTTNG_ASSERT(b->pattern); | |
5c7248cd | 215 | if (strcmp(a->pattern, b->pattern) != 0) { |
0a23a07d JR |
216 | goto end; |
217 | } | |
218 | ||
219 | if (a->filter_expression && b->filter_expression) { | |
5c7248cd | 220 | if (strcmp(a->filter_expression, b->filter_expression) != 0) { |
0a23a07d JR |
221 | goto end; |
222 | } | |
223 | } else if (!!a->filter_expression != !!b->filter_expression) { | |
224 | /* One is set; not the other. */ | |
225 | goto end; | |
226 | } | |
227 | ||
28ab034a | 228 | if (!lttng_log_level_rule_is_equal(a->log_level_rule, b->log_level_rule)) { |
0a23a07d JR |
229 | goto end; |
230 | } | |
231 | ||
232 | for (i = 0; i < count_a; i++) { | |
233 | const char *exclusion_a, *exclusion_b; | |
234 | ||
235 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 236 | _a, i, &exclusion_a); |
a0377dfe | 237 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d | 238 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( |
28ab034a | 239 | _b, i, &exclusion_b); |
a0377dfe | 240 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
5c7248cd | 241 | if (strcmp(exclusion_a, exclusion_b) != 0) { |
0a23a07d JR |
242 | goto end; |
243 | } | |
244 | } | |
245 | ||
246 | is_equal = true; | |
247 | end: | |
248 | return is_equal; | |
249 | } | |
250 | ||
251 | static enum lttng_error_code | |
28ab034a JG |
252 | lttng_event_rule_user_tracepoint_generate_filter_bytecode(struct lttng_event_rule *rule, |
253 | const struct lttng_credentials *creds) | |
0a23a07d JR |
254 | { |
255 | int ret; | |
256 | enum lttng_error_code ret_code; | |
257 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
258 | enum lttng_event_rule_status status; | |
259 | const char *filter; | |
cd9adb8b | 260 | struct lttng_bytecode *bytecode = nullptr; |
0a23a07d | 261 | |
a0377dfe | 262 | LTTNG_ASSERT(rule); |
0a23a07d | 263 | |
28ab034a | 264 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
265 | |
266 | status = lttng_event_rule_user_tracepoint_get_filter(rule, &filter); | |
267 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { | |
cd9adb8b | 268 | filter = nullptr; |
0a23a07d JR |
269 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
270 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
271 | goto end; | |
272 | } | |
273 | ||
274 | if (filter && filter[0] == '\0') { | |
275 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
276 | goto error; | |
277 | } | |
278 | ||
279 | if (filter) { | |
280 | tracepoint->internal_filter.filter = strdup(filter); | |
cd9adb8b | 281 | if (tracepoint->internal_filter.filter == nullptr) { |
0a23a07d JR |
282 | ret_code = LTTNG_ERR_NOMEM; |
283 | goto error; | |
284 | } | |
285 | } else { | |
cd9adb8b | 286 | tracepoint->internal_filter.filter = nullptr; |
0a23a07d JR |
287 | } |
288 | ||
cd9adb8b | 289 | if (tracepoint->internal_filter.filter == nullptr) { |
0a23a07d JR |
290 | ret_code = LTTNG_OK; |
291 | goto end; | |
292 | } | |
293 | ||
28ab034a | 294 | ret = run_as_generate_filter_bytecode(tracepoint->internal_filter.filter, creds, &bytecode); |
0a23a07d JR |
295 | if (ret) { |
296 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
297 | goto end; | |
298 | } | |
299 | ||
300 | tracepoint->internal_filter.bytecode = bytecode; | |
cd9adb8b | 301 | bytecode = nullptr; |
0a23a07d JR |
302 | ret_code = LTTNG_OK; |
303 | ||
304 | error: | |
305 | end: | |
306 | free(bytecode); | |
307 | return ret_code; | |
308 | } | |
309 | ||
28ab034a JG |
310 | static const char * |
311 | lttng_event_rule_user_tracepoint_get_internal_filter(const struct lttng_event_rule *rule) | |
0a23a07d JR |
312 | { |
313 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
314 | ||
a0377dfe | 315 | LTTNG_ASSERT(rule); |
28ab034a | 316 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
317 | return tracepoint->internal_filter.filter; |
318 | } | |
319 | ||
320 | static const struct lttng_bytecode * | |
28ab034a | 321 | lttng_event_rule_user_tracepoint_get_internal_filter_bytecode(const struct lttng_event_rule *rule) |
0a23a07d JR |
322 | { |
323 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
324 | ||
a0377dfe | 325 | LTTNG_ASSERT(rule); |
28ab034a | 326 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
327 | return tracepoint->internal_filter.bytecode; |
328 | } | |
329 | ||
330 | static enum lttng_event_rule_generate_exclusions_status | |
28ab034a JG |
331 | lttng_event_rule_user_tracepoint_generate_exclusions(const struct lttng_event_rule *rule, |
332 | struct lttng_event_exclusion **_exclusions) | |
0a23a07d JR |
333 | { |
334 | unsigned int nb_exclusions = 0, i; | |
335 | struct lttng_event_exclusion *exclusions; | |
336 | enum lttng_event_rule_status event_rule_status; | |
337 | enum lttng_event_rule_generate_exclusions_status ret_status; | |
338 | ||
a0377dfe | 339 | LTTNG_ASSERT(_exclusions); |
0a23a07d JR |
340 | |
341 | event_rule_status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( | |
28ab034a | 342 | rule, &nb_exclusions); |
a0377dfe | 343 | LTTNG_ASSERT(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
344 | if (nb_exclusions == 0) { |
345 | /* Nothing to do. */ | |
cd9adb8b | 346 | exclusions = nullptr; |
0a23a07d JR |
347 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; |
348 | goto end; | |
349 | } | |
350 | ||
28ab034a JG |
351 | exclusions = zmalloc<lttng_event_exclusion>(sizeof(struct lttng_event_exclusion) + |
352 | (LTTNG_SYMBOL_NAME_LEN * nb_exclusions)); | |
0a23a07d JR |
353 | if (!exclusions) { |
354 | PERROR("Failed to allocate exclusions buffer"); | |
355 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OUT_OF_MEMORY; | |
356 | goto end; | |
357 | } | |
358 | ||
359 | exclusions->count = nb_exclusions; | |
360 | for (i = 0; i < nb_exclusions; i++) { | |
361 | int copy_ret; | |
362 | const char *exclusion_str; | |
363 | ||
364 | event_rule_status = | |
28ab034a JG |
365 | lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( |
366 | rule, i, &exclusion_str); | |
a0377dfe | 367 | LTTNG_ASSERT(event_rule_status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d | 368 | |
28ab034a JG |
369 | copy_ret = lttng_strncpy(LTTNG_EVENT_EXCLUSION_NAME_AT(exclusions, i), |
370 | exclusion_str, | |
371 | sizeof(LTTNG_EVENT_EXCLUSION_NAME_AT(exclusions, i))); | |
0a23a07d JR |
372 | if (copy_ret) { |
373 | free(exclusions); | |
cd9adb8b | 374 | exclusions = nullptr; |
0a23a07d JR |
375 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_ERROR; |
376 | goto end; | |
377 | } | |
378 | } | |
379 | ||
380 | ret_status = LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_OK; | |
381 | ||
382 | end: | |
383 | *_exclusions = exclusions; | |
384 | return ret_status; | |
385 | } | |
386 | ||
387 | static void destroy_lttng_exclusions_element(void *ptr) | |
388 | { | |
389 | free(ptr); | |
390 | } | |
391 | ||
28ab034a | 392 | static unsigned long lttng_event_rule_user_tracepoint_hash(const struct lttng_event_rule *rule) |
0a23a07d JR |
393 | { |
394 | unsigned long hash; | |
395 | unsigned int i, exclusion_count; | |
396 | enum lttng_event_rule_status status; | |
397 | struct lttng_event_rule_user_tracepoint *tp_rule = | |
28ab034a | 398 | lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d | 399 | |
28ab034a | 400 | hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT, lttng_ht_seed); |
0a23a07d JR |
401 | hash ^= hash_key_str(tp_rule->pattern, lttng_ht_seed); |
402 | ||
403 | if (tp_rule->filter_expression) { | |
404 | hash ^= hash_key_str(tp_rule->filter_expression, lttng_ht_seed); | |
405 | } | |
406 | ||
407 | if (tp_rule->log_level_rule) { | |
408 | hash ^= lttng_log_level_rule_hash(tp_rule->log_level_rule); | |
409 | } | |
410 | ||
28ab034a JG |
411 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( |
412 | rule, &exclusion_count); | |
a0377dfe | 413 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
414 | |
415 | for (i = 0; i < exclusion_count; i++) { | |
416 | const char *exclusion; | |
417 | ||
418 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 419 | rule, i, &exclusion); |
a0377dfe | 420 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
0a23a07d JR |
421 | hash ^= hash_key_str(exclusion, lttng_ht_seed); |
422 | } | |
423 | ||
424 | return hash; | |
425 | } | |
426 | ||
28ab034a JG |
427 | static enum lttng_error_code |
428 | lttng_event_rule_user_tracepoint_mi_serialize(const struct lttng_event_rule *rule, | |
429 | struct mi_writer *writer) | |
6a751b95 JR |
430 | { |
431 | int ret; | |
432 | enum lttng_error_code ret_code; | |
433 | enum lttng_event_rule_status status; | |
cd9adb8b JG |
434 | const char *filter = nullptr; |
435 | const char *name_pattern = nullptr; | |
436 | const struct lttng_log_level_rule *log_level_rule = nullptr; | |
6a751b95 JR |
437 | unsigned int exclusion_count = 0; |
438 | ||
a0377dfe FD |
439 | LTTNG_ASSERT(rule); |
440 | LTTNG_ASSERT(writer); | |
441 | LTTNG_ASSERT(IS_USER_TRACEPOINT_EVENT_RULE(rule)); | |
6a751b95 | 442 | |
28ab034a | 443 | status = lttng_event_rule_user_tracepoint_get_name_pattern(rule, &name_pattern); |
a0377dfe FD |
444 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
445 | LTTNG_ASSERT(name_pattern); | |
6a751b95 JR |
446 | |
447 | status = lttng_event_rule_user_tracepoint_get_filter(rule, &filter); | |
a0377dfe | 448 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK || |
28ab034a | 449 | status == LTTNG_EVENT_RULE_STATUS_UNSET); |
6a751b95 | 450 | |
28ab034a | 451 | status = lttng_event_rule_user_tracepoint_get_log_level_rule(rule, &log_level_rule); |
a0377dfe | 452 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK || |
28ab034a | 453 | status == LTTNG_EVENT_RULE_STATUS_UNSET); |
6a751b95 JR |
454 | |
455 | status = lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( | |
28ab034a | 456 | rule, &exclusion_count); |
a0377dfe | 457 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
6a751b95 JR |
458 | |
459 | /* Open event rule user tracepoint element. */ | |
28ab034a | 460 | ret = mi_lttng_writer_open_element(writer, mi_lttng_element_event_rule_user_tracepoint); |
6a751b95 JR |
461 | if (ret) { |
462 | goto mi_error; | |
463 | } | |
464 | ||
465 | /* Name pattern. */ | |
28ab034a JG |
466 | ret = mi_lttng_writer_write_element_string( |
467 | writer, mi_lttng_element_event_rule_name_pattern, name_pattern); | |
6a751b95 JR |
468 | if (ret) { |
469 | goto mi_error; | |
470 | } | |
471 | ||
472 | /* Filter expression. */ | |
cd9adb8b | 473 | if (filter != nullptr) { |
28ab034a JG |
474 | ret = mi_lttng_writer_write_element_string( |
475 | writer, mi_lttng_element_event_rule_filter_expression, filter); | |
6a751b95 JR |
476 | if (ret) { |
477 | goto mi_error; | |
478 | } | |
479 | } | |
480 | ||
481 | /* Log level rule. */ | |
482 | if (log_level_rule) { | |
28ab034a | 483 | ret_code = lttng_log_level_rule_mi_serialize(log_level_rule, writer); |
6a751b95 JR |
484 | if (ret_code != LTTNG_OK) { |
485 | goto end; | |
486 | } | |
487 | } | |
488 | ||
489 | if (exclusion_count != 0) { | |
490 | int i; | |
491 | ||
492 | /* Open the exclusion list. */ | |
28ab034a JG |
493 | ret = mi_lttng_writer_open_element( |
494 | writer, | |
495 | mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusions); | |
6a751b95 JR |
496 | if (ret) { |
497 | goto mi_error; | |
498 | } | |
499 | ||
500 | for (i = 0; i < exclusion_count; i++) { | |
501 | const char *exclusion; | |
502 | ||
28ab034a JG |
503 | status = |
504 | lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
6a751b95 | 505 | rule, i, &exclusion); |
a0377dfe | 506 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
6a751b95 | 507 | |
28ab034a JG |
508 | ret = mi_lttng_writer_write_element_string( |
509 | writer, | |
510 | mi_lttng_element_event_rule_user_tracepoint_name_pattern_exclusion, | |
511 | exclusion); | |
6a751b95 JR |
512 | if (ret) { |
513 | goto mi_error; | |
514 | } | |
515 | } | |
516 | ||
517 | /* Close the list. */ | |
518 | ret = mi_lttng_writer_close_element(writer); | |
519 | if (ret) { | |
520 | goto mi_error; | |
521 | } | |
522 | } | |
523 | ||
524 | /* Close event rule user tracepoint element. */ | |
525 | ret = mi_lttng_writer_close_element(writer); | |
526 | if (ret) { | |
527 | goto mi_error; | |
528 | } | |
529 | ||
530 | ret_code = LTTNG_OK; | |
531 | goto end; | |
532 | ||
533 | mi_error: | |
534 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
535 | end: | |
536 | return ret_code; | |
537 | } | |
538 | ||
0a23a07d JR |
539 | struct lttng_event_rule *lttng_event_rule_user_tracepoint_create(void) |
540 | { | |
cd9adb8b | 541 | struct lttng_event_rule *rule = nullptr; |
0a23a07d JR |
542 | struct lttng_event_rule_user_tracepoint *tp_rule; |
543 | enum lttng_event_rule_status status; | |
544 | ||
64803277 | 545 | tp_rule = zmalloc<lttng_event_rule_user_tracepoint>(); |
0a23a07d JR |
546 | if (!tp_rule) { |
547 | goto end; | |
548 | } | |
549 | ||
550 | rule = &tp_rule->parent; | |
551 | lttng_event_rule_init(&tp_rule->parent, LTTNG_EVENT_RULE_TYPE_USER_TRACEPOINT); | |
552 | tp_rule->parent.validate = lttng_event_rule_user_tracepoint_validate; | |
553 | tp_rule->parent.serialize = lttng_event_rule_user_tracepoint_serialize; | |
554 | tp_rule->parent.equal = lttng_event_rule_user_tracepoint_is_equal; | |
555 | tp_rule->parent.destroy = lttng_event_rule_user_tracepoint_destroy; | |
556 | tp_rule->parent.generate_filter_bytecode = | |
28ab034a JG |
557 | lttng_event_rule_user_tracepoint_generate_filter_bytecode; |
558 | tp_rule->parent.get_filter = lttng_event_rule_user_tracepoint_get_internal_filter; | |
0a23a07d | 559 | tp_rule->parent.get_filter_bytecode = |
28ab034a JG |
560 | lttng_event_rule_user_tracepoint_get_internal_filter_bytecode; |
561 | tp_rule->parent.generate_exclusions = lttng_event_rule_user_tracepoint_generate_exclusions; | |
0a23a07d | 562 | tp_rule->parent.hash = lttng_event_rule_user_tracepoint_hash; |
6a751b95 | 563 | tp_rule->parent.mi_serialize = lttng_event_rule_user_tracepoint_mi_serialize; |
0a23a07d JR |
564 | |
565 | /* Not necessary for now. */ | |
cd9adb8b | 566 | tp_rule->parent.generate_lttng_event = nullptr; |
0a23a07d | 567 | |
cd9adb8b | 568 | tp_rule->log_level_rule = nullptr; |
0a23a07d | 569 | |
28ab034a | 570 | lttng_dynamic_pointer_array_init(&tp_rule->exclusions, destroy_lttng_exclusions_element); |
0a23a07d JR |
571 | |
572 | /* Default pattern is '*'. */ | |
573 | status = lttng_event_rule_user_tracepoint_set_name_pattern(rule, "*"); | |
574 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
575 | lttng_event_rule_destroy(rule); | |
cd9adb8b | 576 | rule = nullptr; |
0a23a07d JR |
577 | } |
578 | ||
579 | end: | |
580 | return rule; | |
581 | } | |
582 | ||
28ab034a JG |
583 | ssize_t lttng_event_rule_user_tracepoint_create_from_payload(struct lttng_payload_view *view, |
584 | struct lttng_event_rule **_event_rule) | |
0a23a07d JR |
585 | { |
586 | ssize_t ret, offset = 0; | |
587 | int i; | |
588 | enum lttng_event_rule_status status; | |
589 | const struct lttng_event_rule_user_tracepoint_comm *tracepoint_comm; | |
590 | const char *pattern; | |
cd9adb8b JG |
591 | const char *filter_expression = nullptr; |
592 | const char **exclusions = nullptr; | |
0a23a07d JR |
593 | const uint32_t *exclusion_len; |
594 | const char *exclusion; | |
595 | struct lttng_buffer_view current_buffer_view; | |
cd9adb8b JG |
596 | struct lttng_event_rule *rule = nullptr; |
597 | struct lttng_log_level_rule *log_level_rule = nullptr; | |
0a23a07d JR |
598 | |
599 | if (!_event_rule) { | |
600 | ret = -1; | |
601 | goto end; | |
602 | } | |
603 | ||
28ab034a JG |
604 | current_buffer_view = |
605 | lttng_buffer_view_from_view(&view->buffer, offset, sizeof(*tracepoint_comm)); | |
0a23a07d JR |
606 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
607 | ERR("Failed to initialize from malformed event rule tracepoint: buffer too short to contain header."); | |
608 | ret = -1; | |
609 | goto end; | |
610 | } | |
611 | ||
612 | tracepoint_comm = (typeof(tracepoint_comm)) current_buffer_view.data; | |
613 | ||
614 | rule = lttng_event_rule_user_tracepoint_create(); | |
615 | if (!rule) { | |
616 | ERR("Failed to create event rule user tracepoint."); | |
617 | ret = -1; | |
618 | goto end; | |
619 | } | |
620 | ||
621 | /* Skip to payload. */ | |
622 | offset += current_buffer_view.size; | |
623 | ||
624 | /* Map the pattern. */ | |
28ab034a JG |
625 | current_buffer_view = |
626 | lttng_buffer_view_from_view(&view->buffer, offset, tracepoint_comm->pattern_len); | |
0a23a07d JR |
627 | |
628 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { | |
629 | ret = -1; | |
630 | goto end; | |
631 | } | |
632 | ||
633 | pattern = current_buffer_view.data; | |
28ab034a JG |
634 | if (!lttng_buffer_view_contains_string( |
635 | ¤t_buffer_view, pattern, tracepoint_comm->pattern_len)) { | |
0a23a07d JR |
636 | ret = -1; |
637 | goto end; | |
638 | } | |
639 | ||
640 | /* Skip after the pattern. */ | |
641 | offset += tracepoint_comm->pattern_len; | |
642 | ||
643 | if (!tracepoint_comm->filter_expression_len) { | |
644 | goto skip_filter_expression; | |
645 | } | |
646 | ||
647 | /* Map the filter_expression. */ | |
28ab034a JG |
648 | current_buffer_view = lttng_buffer_view_from_view( |
649 | &view->buffer, offset, tracepoint_comm->filter_expression_len); | |
0a23a07d JR |
650 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
651 | ret = -1; | |
652 | goto end; | |
653 | } | |
654 | ||
655 | filter_expression = current_buffer_view.data; | |
656 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, | |
28ab034a JG |
657 | filter_expression, |
658 | tracepoint_comm->filter_expression_len)) { | |
0a23a07d JR |
659 | ret = -1; |
660 | goto end; | |
661 | } | |
662 | ||
663 | /* Skip after the pattern. */ | |
664 | offset += tracepoint_comm->filter_expression_len; | |
665 | ||
666 | skip_filter_expression: | |
667 | if (!tracepoint_comm->log_level_rule_len) { | |
668 | goto skip_log_level_rule; | |
669 | } | |
670 | ||
671 | { | |
672 | /* Map the log level rule. */ | |
28ab034a JG |
673 | struct lttng_payload_view current_payload_view = lttng_payload_view_from_view( |
674 | view, offset, tracepoint_comm->log_level_rule_len); | |
0a23a07d | 675 | |
28ab034a JG |
676 | ret = lttng_log_level_rule_create_from_payload(¤t_payload_view, |
677 | &log_level_rule); | |
0a23a07d JR |
678 | if (ret < 0) { |
679 | ret = -1; | |
680 | goto end; | |
681 | } | |
682 | ||
a0377dfe | 683 | LTTNG_ASSERT(ret == tracepoint_comm->log_level_rule_len); |
0a23a07d JR |
684 | } |
685 | ||
686 | /* Skip after the log level rule. */ | |
687 | offset += tracepoint_comm->log_level_rule_len; | |
688 | ||
689 | skip_log_level_rule: | |
690 | for (i = 0; i < tracepoint_comm->exclusions_count; i++) { | |
28ab034a JG |
691 | current_buffer_view = |
692 | lttng_buffer_view_from_view(&view->buffer, offset, sizeof(*exclusion_len)); | |
0a23a07d JR |
693 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
694 | ret = -1; | |
695 | goto end; | |
696 | } | |
697 | ||
698 | exclusion_len = (typeof(exclusion_len)) current_buffer_view.data; | |
699 | offset += sizeof(*exclusion_len); | |
700 | ||
28ab034a JG |
701 | current_buffer_view = |
702 | lttng_buffer_view_from_view(&view->buffer, offset, *exclusion_len); | |
0a23a07d JR |
703 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
704 | ret = -1; | |
705 | goto end; | |
706 | } | |
707 | ||
708 | exclusion = current_buffer_view.data; | |
28ab034a JG |
709 | if (!lttng_buffer_view_contains_string( |
710 | ¤t_buffer_view, exclusion, *exclusion_len)) { | |
0a23a07d JR |
711 | ret = -1; |
712 | goto end; | |
713 | } | |
714 | ||
28ab034a JG |
715 | status = lttng_event_rule_user_tracepoint_add_name_pattern_exclusion(rule, |
716 | exclusion); | |
0a23a07d JR |
717 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
718 | ERR("Failed to add event rule user tracepoint exclusion \"%s\".", | |
28ab034a | 719 | exclusion); |
0a23a07d JR |
720 | ret = -1; |
721 | goto end; | |
722 | } | |
723 | ||
724 | /* Skip to next exclusion. */ | |
725 | offset += *exclusion_len; | |
726 | } | |
727 | ||
728 | status = lttng_event_rule_user_tracepoint_set_name_pattern(rule, pattern); | |
729 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
730 | ERR("Failed to set event rule user tracepoint pattern."); | |
731 | ret = -1; | |
732 | goto end; | |
733 | } | |
734 | ||
735 | if (filter_expression) { | |
28ab034a | 736 | status = lttng_event_rule_user_tracepoint_set_filter(rule, filter_expression); |
0a23a07d JR |
737 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
738 | ERR("Failed to set event rule user tracepoint pattern."); | |
739 | ret = -1; | |
740 | goto end; | |
741 | } | |
742 | } | |
743 | ||
744 | if (log_level_rule) { | |
28ab034a | 745 | status = lttng_event_rule_user_tracepoint_set_log_level_rule(rule, log_level_rule); |
0a23a07d JR |
746 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
747 | ERR("Failed to set event rule user tracepoint log level rule."); | |
748 | ret = -1; | |
749 | goto end; | |
750 | } | |
751 | } | |
752 | ||
753 | *_event_rule = rule; | |
cd9adb8b | 754 | rule = nullptr; |
0a23a07d JR |
755 | ret = offset; |
756 | end: | |
757 | free(exclusions); | |
758 | lttng_log_level_rule_destroy(log_level_rule); | |
759 | lttng_event_rule_destroy(rule); | |
760 | return ret; | |
761 | } | |
762 | ||
28ab034a JG |
763 | enum lttng_event_rule_status |
764 | lttng_event_rule_user_tracepoint_set_name_pattern(struct lttng_event_rule *rule, | |
765 | const char *pattern) | |
0a23a07d | 766 | { |
cd9adb8b | 767 | char *pattern_copy = nullptr; |
0a23a07d JR |
768 | struct lttng_event_rule_user_tracepoint *tracepoint; |
769 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
770 | ||
28ab034a | 771 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !pattern || strlen(pattern) == 0) { |
0a23a07d JR |
772 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
773 | goto end; | |
774 | } | |
775 | ||
28ab034a | 776 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
777 | pattern_copy = strdup(pattern); |
778 | if (!pattern_copy) { | |
779 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
780 | goto end; | |
781 | } | |
782 | ||
783 | /* Normalize the pattern. */ | |
784 | strutils_normalize_star_glob_pattern(pattern_copy); | |
785 | ||
786 | free(tracepoint->pattern); | |
787 | ||
788 | tracepoint->pattern = pattern_copy; | |
cd9adb8b | 789 | pattern_copy = nullptr; |
0a23a07d JR |
790 | end: |
791 | return status; | |
792 | } | |
793 | ||
28ab034a JG |
794 | enum lttng_event_rule_status |
795 | lttng_event_rule_user_tracepoint_get_name_pattern(const struct lttng_event_rule *rule, | |
796 | const char **pattern) | |
0a23a07d JR |
797 | { |
798 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
799 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
800 | ||
801 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !pattern) { | |
802 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
803 | goto end; | |
804 | } | |
805 | ||
28ab034a | 806 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
807 | if (!tracepoint->pattern) { |
808 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
809 | goto end; | |
810 | } | |
811 | ||
812 | *pattern = tracepoint->pattern; | |
813 | end: | |
814 | return status; | |
815 | } | |
816 | ||
28ab034a JG |
817 | enum lttng_event_rule_status |
818 | lttng_event_rule_user_tracepoint_set_filter(struct lttng_event_rule *rule, const char *expression) | |
0a23a07d | 819 | { |
cd9adb8b | 820 | char *expression_copy = nullptr; |
0a23a07d JR |
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) || !expression || | |
28ab034a | 825 | strlen(expression) == 0) { |
0a23a07d JR |
826 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
827 | goto end; | |
828 | } | |
829 | ||
28ab034a | 830 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
831 | expression_copy = strdup(expression); |
832 | if (!expression_copy) { | |
833 | PERROR("Failed to copy filter expression"); | |
834 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
835 | goto end; | |
836 | } | |
837 | ||
838 | if (tracepoint->filter_expression) { | |
839 | free(tracepoint->filter_expression); | |
840 | } | |
841 | ||
842 | tracepoint->filter_expression = expression_copy; | |
cd9adb8b | 843 | expression_copy = nullptr; |
0a23a07d JR |
844 | end: |
845 | return status; | |
846 | } | |
847 | ||
28ab034a JG |
848 | enum lttng_event_rule_status |
849 | lttng_event_rule_user_tracepoint_get_filter(const struct lttng_event_rule *rule, | |
850 | const char **expression) | |
0a23a07d JR |
851 | { |
852 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
853 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
854 | ||
855 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !expression) { | |
856 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
857 | goto end; | |
858 | } | |
859 | ||
28ab034a | 860 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
861 | if (!tracepoint->filter_expression) { |
862 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
863 | goto end; | |
864 | } | |
865 | ||
866 | *expression = tracepoint->filter_expression; | |
867 | end: | |
868 | return status; | |
869 | } | |
870 | ||
871 | static bool log_level_rule_valid(const struct lttng_log_level_rule *rule) | |
872 | { | |
873 | bool valid = false; | |
874 | enum lttng_log_level_rule_status status; | |
875 | int level; | |
876 | ||
877 | switch (lttng_log_level_rule_get_type(rule)) { | |
878 | case LTTNG_LOG_LEVEL_RULE_TYPE_EXACTLY: | |
879 | status = lttng_log_level_rule_exactly_get_level(rule, &level); | |
880 | break; | |
881 | case LTTNG_LOG_LEVEL_RULE_TYPE_AT_LEAST_AS_SEVERE_AS: | |
28ab034a | 882 | status = lttng_log_level_rule_at_least_as_severe_as_get_level(rule, &level); |
0a23a07d JR |
883 | break; |
884 | default: | |
885 | abort(); | |
886 | } | |
887 | ||
a0377dfe | 888 | LTTNG_ASSERT(status == LTTNG_LOG_LEVEL_RULE_STATUS_OK); |
0a23a07d JR |
889 | |
890 | if (level < LTTNG_LOGLEVEL_EMERG) { | |
891 | /* Invalid. */ | |
892 | goto end; | |
893 | } | |
894 | if (level > LTTNG_LOGLEVEL_DEBUG) { | |
895 | /* Invalid. */ | |
896 | goto end; | |
897 | } | |
898 | ||
899 | valid = true; | |
900 | ||
901 | end: | |
902 | return valid; | |
903 | } | |
904 | ||
905 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_set_log_level_rule( | |
28ab034a | 906 | struct lttng_event_rule *rule, const struct lttng_log_level_rule *log_level_rule) |
0a23a07d JR |
907 | { |
908 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
909 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
cd9adb8b | 910 | struct lttng_log_level_rule *copy = nullptr; |
0a23a07d JR |
911 | |
912 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule)) { | |
913 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
914 | goto end; | |
915 | } | |
916 | ||
28ab034a | 917 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
918 | |
919 | if (!log_level_rule_valid(log_level_rule)) { | |
920 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
921 | goto end; | |
922 | } | |
923 | ||
924 | copy = lttng_log_level_rule_copy(log_level_rule); | |
cd9adb8b | 925 | if (copy == nullptr) { |
0a23a07d JR |
926 | status = LTTNG_EVENT_RULE_STATUS_ERROR; |
927 | goto end; | |
928 | } | |
929 | ||
930 | if (tracepoint->log_level_rule) { | |
931 | lttng_log_level_rule_destroy(tracepoint->log_level_rule); | |
932 | } | |
933 | ||
934 | tracepoint->log_level_rule = copy; | |
935 | ||
936 | end: | |
937 | return status; | |
938 | } | |
939 | ||
940 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_log_level_rule( | |
28ab034a | 941 | const struct lttng_event_rule *rule, const struct lttng_log_level_rule **log_level_rule) |
0a23a07d JR |
942 | { |
943 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
944 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
945 | ||
946 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !log_level_rule) { | |
947 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
948 | goto end; | |
949 | } | |
950 | ||
28ab034a | 951 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
cd9adb8b | 952 | if (tracepoint->log_level_rule == nullptr) { |
0a23a07d JR |
953 | status = LTTNG_EVENT_RULE_STATUS_UNSET; |
954 | goto end; | |
955 | } | |
956 | ||
957 | *log_level_rule = tracepoint->log_level_rule; | |
958 | end: | |
959 | return status; | |
960 | } | |
961 | ||
28ab034a JG |
962 | enum lttng_event_rule_status |
963 | lttng_event_rule_user_tracepoint_add_name_pattern_exclusion(struct lttng_event_rule *rule, | |
964 | const char *exclusion) | |
0a23a07d JR |
965 | { |
966 | int ret; | |
cd9adb8b | 967 | char *exclusion_copy = nullptr; |
0a23a07d JR |
968 | struct lttng_event_rule_user_tracepoint *tracepoint; |
969 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
970 | ||
28ab034a | 971 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { |
0a23a07d JR |
972 | status = LTTNG_EVENT_RULE_STATUS_INVALID; |
973 | goto end; | |
974 | } | |
975 | ||
28ab034a | 976 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
977 | |
978 | if (strlen(exclusion) >= LTTNG_SYMBOL_NAME_LEN) { | |
979 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
980 | goto end; | |
981 | } | |
982 | ||
983 | exclusion_copy = strdup(exclusion); | |
984 | if (!exclusion_copy) { | |
985 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
986 | goto end; | |
987 | } | |
988 | ||
28ab034a | 989 | ret = lttng_dynamic_pointer_array_add_pointer(&tracepoint->exclusions, exclusion_copy); |
0a23a07d JR |
990 | if (ret < 0) { |
991 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
992 | goto end; | |
993 | } | |
994 | ||
cd9adb8b | 995 | exclusion_copy = nullptr; |
0a23a07d JR |
996 | end: |
997 | free(exclusion_copy); | |
998 | return status; | |
999 | } | |
1000 | ||
1001 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count( | |
28ab034a | 1002 | const struct lttng_event_rule *rule, unsigned int *count) |
0a23a07d JR |
1003 | { |
1004 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
1005 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1006 | ||
1007 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !count) { | |
1008 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1009 | goto end; | |
1010 | } | |
1011 | ||
28ab034a | 1012 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d JR |
1013 | *count = lttng_dynamic_pointer_array_get_count(&tracepoint->exclusions); |
1014 | end: | |
1015 | return status; | |
1016 | } | |
1017 | ||
1018 | enum lttng_event_rule_status lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_at_index( | |
28ab034a | 1019 | const struct lttng_event_rule *rule, unsigned int index, const char **exclusion) |
0a23a07d JR |
1020 | { |
1021 | unsigned int count; | |
1022 | struct lttng_event_rule_user_tracepoint *tracepoint; | |
1023 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; | |
1024 | ||
1025 | if (!rule || !IS_USER_TRACEPOINT_EVENT_RULE(rule) || !exclusion) { | |
1026 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
1027 | goto end; | |
1028 | } | |
1029 | ||
28ab034a | 1030 | tracepoint = lttng::utils::container_of(rule, <tng_event_rule_user_tracepoint::parent); |
0a23a07d | 1031 | if (lttng_event_rule_user_tracepoint_get_name_pattern_exclusion_count(rule, &count) != |
28ab034a | 1032 | LTTNG_EVENT_RULE_STATUS_OK) { |
0a23a07d JR |
1033 | goto end; |
1034 | } | |
1035 | ||
1036 | if (index >= count) { | |
1037 | goto end; | |
1038 | } | |
1039 | ||
28ab034a JG |
1040 | *exclusion = (const char *) lttng_dynamic_pointer_array_get_pointer(&tracepoint->exclusions, |
1041 | index); | |
0a23a07d JR |
1042 | end: |
1043 | return status; | |
1044 | } |