Commit | Line | Data |
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e6a39346 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 | ||
58daac01 | 8 | #include <common/credentials.h> |
e6a39346 | 9 | #include <common/error.h> |
6a751b95 JR |
10 | #include <common/hashtable/hashtable.h> |
11 | #include <common/hashtable/utils.h> | |
e6a39346 | 12 | #include <common/macros.h> |
6a751b95 | 13 | #include <common/mi-lttng.h> |
e6a39346 | 14 | #include <common/payload-view.h> |
6a751b95 | 15 | #include <common/payload.h> |
e6a39346 | 16 | #include <common/runas.h> |
40fd2ccf | 17 | #include <common/string-utils/string-utils.h> |
e6a39346 | 18 | #include <lttng/event-rule/event-rule-internal.h> |
4f7da553 | 19 | #include <lttng/event-rule/kernel-syscall-internal.h> |
e6a39346 JR |
20 | |
21 | #define IS_SYSCALL_EVENT_RULE(rule) \ | |
4f7da553 | 22 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL) |
e6a39346 | 23 | |
4f7da553 | 24 | static void lttng_event_rule_kernel_syscall_destroy(struct lttng_event_rule *rule) |
e6a39346 | 25 | { |
4f7da553 | 26 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
27 | |
28 | if (rule == NULL) { | |
29 | return; | |
30 | } | |
31 | ||
4f7da553 | 32 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
33 | |
34 | free(syscall->pattern); | |
35 | free(syscall->filter_expression); | |
36 | free(syscall->internal_filter.filter); | |
37 | free(syscall->internal_filter.bytecode); | |
38 | free(syscall); | |
39 | } | |
40 | ||
4f7da553 | 41 | static bool lttng_event_rule_kernel_syscall_validate( |
e6a39346 JR |
42 | const struct lttng_event_rule *rule) |
43 | { | |
44 | bool valid = false; | |
4f7da553 | 45 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
46 | |
47 | if (!rule) { | |
48 | goto end; | |
49 | } | |
50 | ||
4f7da553 | 51 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
52 | |
53 | /* Required field. */ | |
54 | if (!syscall->pattern) { | |
55 | ERR("Invalid syscall event rule: a pattern must be set."); | |
56 | goto end; | |
57 | } | |
58 | ||
59 | valid = true; | |
60 | end: | |
61 | return valid; | |
62 | } | |
63 | ||
4f7da553 | 64 | static int lttng_event_rule_kernel_syscall_serialize( |
e6a39346 JR |
65 | const struct lttng_event_rule *rule, |
66 | struct lttng_payload *payload) | |
67 | { | |
68 | int ret; | |
69 | size_t pattern_len, filter_expression_len; | |
4f7da553 JR |
70 | struct lttng_event_rule_kernel_syscall *syscall; |
71 | struct lttng_event_rule_kernel_syscall_comm syscall_comm; | |
e6a39346 JR |
72 | |
73 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule)) { | |
74 | ret = -1; | |
75 | goto end; | |
76 | } | |
77 | ||
78 | DBG("Serializing syscall event rule"); | |
4f7da553 | 79 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
80 | |
81 | pattern_len = strlen(syscall->pattern) + 1; | |
82 | ||
83 | if (syscall->filter_expression != NULL) { | |
84 | filter_expression_len = strlen(syscall->filter_expression) + 1; | |
85 | } else { | |
86 | filter_expression_len = 0; | |
87 | } | |
88 | ||
89 | syscall_comm.pattern_len = pattern_len; | |
90 | syscall_comm.filter_expression_len = filter_expression_len; | |
f6a5af19 | 91 | syscall_comm.emission_site = syscall->emission_site; |
e6a39346 JR |
92 | |
93 | ret = lttng_dynamic_buffer_append( | |
94 | &payload->buffer, &syscall_comm, sizeof(syscall_comm)); | |
95 | if (ret) { | |
96 | goto end; | |
97 | } | |
98 | ||
99 | ret = lttng_dynamic_buffer_append( | |
100 | &payload->buffer, syscall->pattern, pattern_len); | |
101 | if (ret) { | |
102 | goto end; | |
103 | } | |
104 | ||
105 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
106 | syscall->filter_expression, filter_expression_len); | |
107 | end: | |
108 | return ret; | |
109 | } | |
110 | ||
4f7da553 | 111 | static bool lttng_event_rule_kernel_syscall_is_equal(const struct lttng_event_rule *_a, |
e6a39346 JR |
112 | const struct lttng_event_rule *_b) |
113 | { | |
114 | bool is_equal = false; | |
4f7da553 | 115 | struct lttng_event_rule_kernel_syscall *a, *b; |
e6a39346 | 116 | |
4f7da553 JR |
117 | a = container_of(_a, struct lttng_event_rule_kernel_syscall, parent); |
118 | b = container_of(_b, struct lttng_event_rule_kernel_syscall, parent); | |
e6a39346 JR |
119 | |
120 | if (!!a->filter_expression != !!b->filter_expression) { | |
121 | goto end; | |
122 | } | |
123 | ||
a0377dfe FD |
124 | LTTNG_ASSERT(a->pattern); |
125 | LTTNG_ASSERT(b->pattern); | |
e6a39346 JR |
126 | if (strcmp(a->pattern, b->pattern)) { |
127 | goto end; | |
128 | } | |
129 | ||
130 | if (a->filter_expression && b->filter_expression) { | |
131 | if (strcmp(a->filter_expression, b->filter_expression)) { | |
132 | goto end; | |
133 | } | |
134 | } else if (!!a->filter_expression != !!b->filter_expression) { | |
135 | /* One is set and not the other. */ | |
136 | goto end; | |
137 | } | |
138 | ||
139 | is_equal = true; | |
140 | end: | |
141 | return is_equal; | |
142 | } | |
143 | ||
4f7da553 | 144 | static enum lttng_error_code lttng_event_rule_kernel_syscall_generate_filter_bytecode( |
58daac01 JR |
145 | struct lttng_event_rule *rule, |
146 | const struct lttng_credentials *creds) | |
e6a39346 JR |
147 | { |
148 | int ret; | |
149 | enum lttng_error_code ret_code = LTTNG_OK; | |
4f7da553 | 150 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
151 | enum lttng_event_rule_status status; |
152 | const char *filter; | |
2b00d462 | 153 | struct lttng_bytecode *bytecode = NULL; |
e6a39346 | 154 | |
a0377dfe | 155 | LTTNG_ASSERT(rule); |
e6a39346 | 156 | |
4f7da553 | 157 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
158 | |
159 | /* Generate the filter bytecode. */ | |
4f7da553 | 160 | status = lttng_event_rule_kernel_syscall_get_filter(rule, &filter); |
e6a39346 JR |
161 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { |
162 | filter = NULL; | |
163 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
164 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
165 | goto end; | |
166 | } | |
167 | ||
168 | if (filter && filter[0] == '\0') { | |
169 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
170 | goto end; | |
171 | } | |
172 | ||
173 | if (filter == NULL) { | |
174 | /* Nothing to do. */ | |
175 | ret = LTTNG_OK; | |
176 | goto end; | |
177 | } | |
178 | ||
179 | syscall->internal_filter.filter = strdup(filter); | |
180 | if (syscall->internal_filter.filter == NULL) { | |
181 | ret_code = LTTNG_ERR_NOMEM; | |
182 | goto end; | |
183 | } | |
184 | ||
185 | ret = run_as_generate_filter_bytecode( | |
58daac01 | 186 | syscall->internal_filter.filter, creds, &bytecode); |
e6a39346 JR |
187 | if (ret) { |
188 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
189 | } | |
190 | ||
191 | syscall->internal_filter.bytecode = bytecode; | |
192 | bytecode = NULL; | |
193 | ||
194 | end: | |
195 | free(bytecode); | |
196 | return ret_code; | |
197 | } | |
198 | ||
4f7da553 | 199 | static const char *lttng_event_rule_kernel_syscall_get_internal_filter( |
e6a39346 JR |
200 | const struct lttng_event_rule *rule) |
201 | { | |
4f7da553 | 202 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 | 203 | |
a0377dfe | 204 | LTTNG_ASSERT(rule); |
4f7da553 | 205 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
206 | |
207 | return syscall->internal_filter.filter; | |
208 | } | |
209 | ||
2b00d462 | 210 | static const struct lttng_bytecode * |
4f7da553 | 211 | lttng_event_rule_kernel_syscall_get_internal_filter_bytecode( |
e6a39346 JR |
212 | const struct lttng_event_rule *rule) |
213 | { | |
4f7da553 | 214 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 | 215 | |
a0377dfe | 216 | LTTNG_ASSERT(rule); |
4f7da553 | 217 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
218 | |
219 | return syscall->internal_filter.bytecode; | |
220 | } | |
221 | ||
993578ff | 222 | static enum lttng_event_rule_generate_exclusions_status |
4f7da553 | 223 | lttng_event_rule_kernel_syscall_generate_exclusions(const struct lttng_event_rule *rule, |
993578ff | 224 | struct lttng_event_exclusion **exclusions) |
e6a39346 | 225 | { |
993578ff JR |
226 | /* Unsupported. */ |
227 | *exclusions = NULL; | |
228 | return LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; | |
e6a39346 JR |
229 | } |
230 | ||
959e3c66 | 231 | static unsigned long |
4f7da553 | 232 | lttng_event_rule_kernel_syscall_hash( |
959e3c66 JR |
233 | const struct lttng_event_rule *rule) |
234 | { | |
235 | unsigned long hash; | |
4f7da553 | 236 | struct lttng_event_rule_kernel_syscall *syscall_rule = |
959e3c66 JR |
237 | container_of(rule, typeof(*syscall_rule), parent); |
238 | ||
4f7da553 | 239 | hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL, |
959e3c66 JR |
240 | lttng_ht_seed); |
241 | hash ^= hash_key_str(syscall_rule->pattern, lttng_ht_seed); | |
242 | if (syscall_rule->filter_expression) { | |
243 | hash ^= hash_key_str(syscall_rule->filter_expression, | |
244 | lttng_ht_seed); | |
245 | } | |
246 | ||
247 | return hash; | |
248 | } | |
249 | ||
6a751b95 JR |
250 | static enum lttng_error_code lttng_event_rule_kernel_syscall_mi_serialize( |
251 | const struct lttng_event_rule *rule, struct mi_writer *writer) | |
252 | { | |
253 | int ret; | |
254 | enum lttng_error_code ret_code; | |
255 | enum lttng_event_rule_status status; | |
256 | ||
257 | enum lttng_event_rule_kernel_syscall_emission_site site_type; | |
258 | const char *filter = NULL; | |
259 | const char *name_pattern = NULL; | |
260 | const char *site_type_str = NULL; | |
261 | ||
a0377dfe FD |
262 | LTTNG_ASSERT(rule); |
263 | LTTNG_ASSERT(writer); | |
264 | LTTNG_ASSERT(IS_SYSCALL_EVENT_RULE(rule)); | |
6a751b95 JR |
265 | |
266 | status = lttng_event_rule_kernel_syscall_get_name_pattern( | |
267 | rule, &name_pattern); | |
a0377dfe FD |
268 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK); |
269 | LTTNG_ASSERT(name_pattern); | |
6a751b95 JR |
270 | |
271 | status = lttng_event_rule_kernel_syscall_get_filter(rule, &filter); | |
a0377dfe | 272 | LTTNG_ASSERT(status == LTTNG_EVENT_RULE_STATUS_OK || |
6a751b95 JR |
273 | status == LTTNG_EVENT_RULE_STATUS_UNSET); |
274 | ||
275 | site_type = lttng_event_rule_kernel_syscall_get_emission_site(rule); | |
276 | ||
277 | switch (site_type) { | |
278 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY_EXIT: | |
279 | site_type_str = mi_lttng_event_rule_kernel_syscall_emission_site_entry_exit; | |
280 | break; | |
281 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY: | |
282 | site_type_str = mi_lttng_event_rule_kernel_syscall_emission_site_entry; | |
283 | break; | |
284 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_EXIT: | |
285 | site_type_str = mi_lttng_event_rule_kernel_syscall_emission_site_exit; | |
286 | break; | |
287 | default: | |
288 | abort(); | |
289 | break; | |
290 | } | |
291 | ||
292 | /* Open event rule kernel syscall element. */ | |
293 | ret = mi_lttng_writer_open_element( | |
294 | writer, mi_lttng_element_event_rule_kernel_syscall); | |
295 | if (ret) { | |
296 | goto mi_error; | |
297 | } | |
298 | ||
299 | /* Emission site. */ | |
300 | ret = mi_lttng_writer_write_element_string(writer, | |
301 | mi_lttng_element_event_rule_kernel_syscall_emission_site, | |
302 | site_type_str); | |
303 | if (ret) { | |
304 | goto mi_error; | |
305 | } | |
306 | ||
307 | /* Name pattern. */ | |
308 | ret = mi_lttng_writer_write_element_string(writer, | |
309 | mi_lttng_element_event_rule_name_pattern, name_pattern); | |
310 | if (ret) { | |
311 | goto mi_error; | |
312 | } | |
313 | ||
314 | /* Filter. */ | |
315 | if (filter != NULL) { | |
316 | ret = mi_lttng_writer_write_element_string(writer, | |
317 | mi_lttng_element_event_rule_filter_expression, | |
318 | filter); | |
319 | if (ret) { | |
320 | goto mi_error; | |
321 | } | |
322 | } | |
323 | ||
324 | /* Close event rule kernel syscall. */ | |
325 | ret = mi_lttng_writer_close_element(writer); | |
326 | if (ret) { | |
327 | goto mi_error; | |
328 | } | |
329 | ||
330 | ret_code = LTTNG_OK; | |
331 | goto end; | |
332 | ||
333 | mi_error: | |
334 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
335 | end: | |
336 | return ret_code; | |
337 | } | |
338 | ||
4f7da553 JR |
339 | struct lttng_event_rule *lttng_event_rule_kernel_syscall_create( |
340 | enum lttng_event_rule_kernel_syscall_emission_site | |
f6a5af19 | 341 | emission_site) |
e6a39346 JR |
342 | { |
343 | struct lttng_event_rule *rule = NULL; | |
4f7da553 | 344 | struct lttng_event_rule_kernel_syscall *syscall_rule; |
67d38b93 | 345 | enum lttng_event_rule_status status; |
e6a39346 | 346 | |
57739a6b | 347 | /* Validate the emission site type */ |
f6a5af19 | 348 | switch (emission_site) { |
4f7da553 JR |
349 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY_EXIT: |
350 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY: | |
351 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_EXIT: | |
57739a6b JR |
352 | break; |
353 | default: | |
354 | /* Invalid emission type */ | |
355 | goto end; | |
356 | } | |
357 | ||
a6bc4ca9 | 358 | syscall_rule = (lttng_event_rule_kernel_syscall *) zmalloc(sizeof(struct lttng_event_rule_kernel_syscall)); |
e6a39346 JR |
359 | if (!syscall_rule) { |
360 | goto end; | |
361 | } | |
362 | ||
363 | rule = &syscall_rule->parent; | |
364 | lttng_event_rule_init( | |
4f7da553 JR |
365 | &syscall_rule->parent, LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL); |
366 | syscall_rule->parent.validate = lttng_event_rule_kernel_syscall_validate; | |
367 | syscall_rule->parent.serialize = lttng_event_rule_kernel_syscall_serialize; | |
368 | syscall_rule->parent.equal = lttng_event_rule_kernel_syscall_is_equal; | |
369 | syscall_rule->parent.destroy = lttng_event_rule_kernel_syscall_destroy; | |
e6a39346 | 370 | syscall_rule->parent.generate_filter_bytecode = |
4f7da553 | 371 | lttng_event_rule_kernel_syscall_generate_filter_bytecode; |
e6a39346 | 372 | syscall_rule->parent.get_filter = |
4f7da553 | 373 | lttng_event_rule_kernel_syscall_get_internal_filter; |
e6a39346 | 374 | syscall_rule->parent.get_filter_bytecode = |
4f7da553 | 375 | lttng_event_rule_kernel_syscall_get_internal_filter_bytecode; |
e6a39346 | 376 | syscall_rule->parent.generate_exclusions = |
4f7da553 JR |
377 | lttng_event_rule_kernel_syscall_generate_exclusions; |
378 | syscall_rule->parent.hash = lttng_event_rule_kernel_syscall_hash; | |
6a751b95 | 379 | syscall_rule->parent.mi_serialize = lttng_event_rule_kernel_syscall_mi_serialize; |
67d38b93 JR |
380 | |
381 | /* Default pattern is '*'. */ | |
4f7da553 | 382 | status = lttng_event_rule_kernel_syscall_set_name_pattern(rule, "*"); |
67d38b93 JR |
383 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
384 | lttng_event_rule_destroy(rule); | |
385 | rule = NULL; | |
386 | } | |
387 | ||
57739a6b | 388 | /* Emission site type */ |
f6a5af19 | 389 | syscall_rule->emission_site = emission_site; |
57739a6b | 390 | |
e6a39346 JR |
391 | end: |
392 | return rule; | |
393 | } | |
394 | ||
4f7da553 | 395 | ssize_t lttng_event_rule_kernel_syscall_create_from_payload( |
e6a39346 JR |
396 | struct lttng_payload_view *view, |
397 | struct lttng_event_rule **_event_rule) | |
398 | { | |
399 | ssize_t ret, offset = 0; | |
400 | enum lttng_event_rule_status status; | |
4f7da553 | 401 | const struct lttng_event_rule_kernel_syscall_comm *syscall_comm; |
e6a39346 JR |
402 | const char *pattern; |
403 | const char *filter_expression = NULL; | |
404 | struct lttng_buffer_view current_buffer_view; | |
405 | struct lttng_event_rule *rule = NULL; | |
406 | ||
407 | if (!_event_rule) { | |
408 | ret = -1; | |
409 | goto end; | |
410 | } | |
411 | ||
412 | if (view->buffer.size < sizeof(*syscall_comm)) { | |
413 | ERR("Failed to initialize from malformed event rule syscall: buffer too short to contain header"); | |
414 | ret = -1; | |
415 | goto end; | |
416 | } | |
417 | ||
418 | current_buffer_view = lttng_buffer_view_from_view( | |
419 | &view->buffer, offset, sizeof(*syscall_comm)); | |
3e6e0df2 | 420 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
e6a39346 JR |
421 | ret = -1; |
422 | goto end; | |
423 | } | |
424 | ||
3e6e0df2 | 425 | syscall_comm = (typeof(syscall_comm)) current_buffer_view.data; |
a6bc4ca9 | 426 | rule = lttng_event_rule_kernel_syscall_create((lttng_event_rule_kernel_syscall_emission_site) syscall_comm->emission_site); |
e6a39346 JR |
427 | if (!rule) { |
428 | ERR("Failed to create event rule syscall"); | |
429 | ret = -1; | |
430 | goto end; | |
431 | } | |
432 | ||
433 | /* Skip to payload. */ | |
434 | offset += current_buffer_view.size; | |
435 | ||
436 | /* Map the pattern. */ | |
437 | current_buffer_view = lttng_buffer_view_from_view( | |
438 | &view->buffer, offset, syscall_comm->pattern_len); | |
3e6e0df2 | 439 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
e6a39346 JR |
440 | ret = -1; |
441 | goto end; | |
442 | } | |
443 | ||
3e6e0df2 | 444 | pattern = current_buffer_view.data; |
e6a39346 JR |
445 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, |
446 | syscall_comm->pattern_len)) { | |
447 | ret = -1; | |
448 | goto end; | |
449 | } | |
450 | ||
451 | /* Skip after the pattern. */ | |
452 | offset += syscall_comm->pattern_len; | |
453 | ||
454 | if (!syscall_comm->filter_expression_len) { | |
455 | goto skip_filter_expression; | |
456 | } | |
457 | ||
458 | /* Map the filter_expression. */ | |
459 | current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, | |
460 | syscall_comm->filter_expression_len); | |
3e6e0df2 | 461 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
e6a39346 JR |
462 | ret = -1; |
463 | goto end; | |
464 | } | |
465 | ||
3e6e0df2 | 466 | filter_expression = current_buffer_view.data; |
e6a39346 JR |
467 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, |
468 | filter_expression, | |
469 | syscall_comm->filter_expression_len)) { | |
470 | ret = -1; | |
471 | goto end; | |
472 | } | |
473 | ||
474 | /* Skip after the pattern. */ | |
475 | offset += syscall_comm->filter_expression_len; | |
476 | ||
477 | skip_filter_expression: | |
478 | ||
4f7da553 | 479 | status = lttng_event_rule_kernel_syscall_set_name_pattern(rule, pattern); |
e6a39346 JR |
480 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
481 | ERR("Failed to set event rule syscall pattern"); | |
482 | ret = -1; | |
483 | goto end; | |
484 | } | |
485 | ||
486 | if (filter_expression) { | |
4f7da553 | 487 | status = lttng_event_rule_kernel_syscall_set_filter( |
e6a39346 JR |
488 | rule, filter_expression); |
489 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
490 | ERR("Failed to set event rule syscall pattern"); | |
491 | ret = -1; | |
492 | goto end; | |
493 | } | |
494 | } | |
495 | ||
496 | *_event_rule = rule; | |
497 | rule = NULL; | |
498 | ret = offset; | |
499 | end: | |
500 | lttng_event_rule_destroy(rule); | |
501 | return ret; | |
502 | } | |
503 | ||
4f7da553 | 504 | enum lttng_event_rule_status lttng_event_rule_kernel_syscall_set_name_pattern( |
e6a39346 JR |
505 | struct lttng_event_rule *rule, const char *pattern) |
506 | { | |
507 | char *pattern_copy = NULL; | |
4f7da553 | 508 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
509 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
510 | ||
511 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule) || !pattern || | |
512 | strlen(pattern) == 0) { | |
513 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
514 | goto end; | |
515 | } | |
516 | ||
4f7da553 | 517 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
518 | pattern_copy = strdup(pattern); |
519 | if (!pattern_copy) { | |
520 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
521 | goto end; | |
522 | } | |
523 | ||
40fd2ccf JR |
524 | strutils_normalize_star_glob_pattern(pattern_copy); |
525 | ||
526 | free(syscall->pattern); | |
e6a39346 JR |
527 | |
528 | syscall->pattern = pattern_copy; | |
529 | pattern_copy = NULL; | |
530 | end: | |
531 | return status; | |
532 | } | |
533 | ||
4f7da553 | 534 | enum lttng_event_rule_status lttng_event_rule_kernel_syscall_get_name_pattern( |
e6a39346 JR |
535 | const struct lttng_event_rule *rule, const char **pattern) |
536 | { | |
4f7da553 | 537 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
538 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
539 | ||
540 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule) || !pattern) { | |
541 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
542 | goto end; | |
543 | } | |
544 | ||
4f7da553 | 545 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
546 | if (!syscall->pattern) { |
547 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
548 | goto end; | |
549 | } | |
550 | ||
551 | *pattern = syscall->pattern; | |
552 | end: | |
553 | return status; | |
554 | } | |
555 | ||
4f7da553 | 556 | enum lttng_event_rule_status lttng_event_rule_kernel_syscall_set_filter( |
e6a39346 JR |
557 | struct lttng_event_rule *rule, const char *expression) |
558 | { | |
559 | char *expression_copy = NULL; | |
4f7da553 | 560 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
561 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
562 | ||
563 | /* TODO: validate that the passed expression is valid. */ | |
564 | ||
565 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule) || !expression || | |
566 | strlen(expression) == 0) { | |
567 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
568 | goto end; | |
569 | } | |
570 | ||
4f7da553 | 571 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
572 | expression_copy = strdup(expression); |
573 | if (!expression_copy) { | |
574 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
575 | goto end; | |
576 | } | |
577 | ||
578 | if (syscall->filter_expression) { | |
579 | free(syscall->filter_expression); | |
580 | } | |
581 | ||
582 | syscall->filter_expression = expression_copy; | |
583 | expression_copy = NULL; | |
584 | end: | |
585 | return status; | |
586 | } | |
587 | ||
4f7da553 | 588 | enum lttng_event_rule_status lttng_event_rule_kernel_syscall_get_filter( |
e6a39346 JR |
589 | const struct lttng_event_rule *rule, const char **expression) |
590 | { | |
4f7da553 | 591 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
592 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
593 | ||
594 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule) || !expression) { | |
595 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
596 | goto end; | |
597 | } | |
598 | ||
4f7da553 | 599 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
600 | if (!syscall->filter_expression) { |
601 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
602 | goto end; | |
603 | } | |
604 | ||
605 | *expression = syscall->filter_expression; | |
606 | end: | |
607 | return status; | |
608 | } | |
4f7da553 JR |
609 | extern enum lttng_event_rule_kernel_syscall_emission_site |
610 | lttng_event_rule_kernel_syscall_get_emission_site( | |
57739a6b JR |
611 | const struct lttng_event_rule *rule) |
612 | { | |
4f7da553 JR |
613 | enum lttng_event_rule_kernel_syscall_emission_site emission_site = |
614 | LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_UNKNOWN; | |
615 | struct lttng_event_rule_kernel_syscall *syscall; | |
57739a6b JR |
616 | |
617 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule)) { | |
618 | goto end; | |
619 | } | |
620 | ||
4f7da553 | 621 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
f6a5af19 | 622 | emission_site = syscall->emission_site; |
57739a6b JR |
623 | |
624 | end: | |
f6a5af19 | 625 | return emission_site; |
57739a6b JR |
626 | } |
627 | ||
4f7da553 JR |
628 | const char *lttng_event_rule_kernel_syscall_emission_site_str( |
629 | enum lttng_event_rule_kernel_syscall_emission_site emission_site) | |
57739a6b | 630 | { |
f6a5af19 | 631 | switch (emission_site) { |
4f7da553 | 632 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY: |
57739a6b | 633 | return "entry"; |
4f7da553 | 634 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY_EXIT: |
57739a6b | 635 | return "entry+exit"; |
4f7da553 | 636 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_EXIT: |
57739a6b JR |
637 | return "exit"; |
638 | default: | |
639 | return "???"; | |
640 | } | |
641 | } |