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 | ||
8 | #include <assert.h> | |
58daac01 | 9 | #include <common/credentials.h> |
e6a39346 | 10 | #include <common/error.h> |
0f7c2963 JR |
11 | #include <common/hashtable/hashtable.h> |
12 | #include <common/hashtable/utils.h> | |
e6a39346 | 13 | #include <common/macros.h> |
0f7c2963 | 14 | #include <common/mi-lttng.h> |
e6a39346 | 15 | #include <common/payload-view.h> |
0f7c2963 | 16 | #include <common/payload.h> |
e6a39346 | 17 | #include <common/runas.h> |
40fd2ccf | 18 | #include <common/string-utils/string-utils.h> |
e6a39346 | 19 | #include <lttng/event-rule/event-rule-internal.h> |
213efb0c | 20 | #include <lttng/event-rule/kernel-syscall-internal.h> |
e6a39346 JR |
21 | |
22 | #define IS_SYSCALL_EVENT_RULE(rule) \ | |
213efb0c | 23 | (lttng_event_rule_get_type(rule) == LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL) |
e6a39346 | 24 | |
213efb0c | 25 | static void lttng_event_rule_kernel_syscall_destroy(struct lttng_event_rule *rule) |
e6a39346 | 26 | { |
213efb0c | 27 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
28 | |
29 | if (rule == NULL) { | |
30 | return; | |
31 | } | |
32 | ||
213efb0c | 33 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
34 | |
35 | free(syscall->pattern); | |
36 | free(syscall->filter_expression); | |
37 | free(syscall->internal_filter.filter); | |
38 | free(syscall->internal_filter.bytecode); | |
39 | free(syscall); | |
40 | } | |
41 | ||
213efb0c | 42 | static bool lttng_event_rule_kernel_syscall_validate( |
e6a39346 JR |
43 | const struct lttng_event_rule *rule) |
44 | { | |
45 | bool valid = false; | |
213efb0c | 46 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
47 | |
48 | if (!rule) { | |
49 | goto end; | |
50 | } | |
51 | ||
213efb0c | 52 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
53 | |
54 | /* Required field. */ | |
55 | if (!syscall->pattern) { | |
56 | ERR("Invalid syscall event rule: a pattern must be set."); | |
57 | goto end; | |
58 | } | |
59 | ||
60 | valid = true; | |
61 | end: | |
62 | return valid; | |
63 | } | |
64 | ||
213efb0c | 65 | static int lttng_event_rule_kernel_syscall_serialize( |
e6a39346 JR |
66 | const struct lttng_event_rule *rule, |
67 | struct lttng_payload *payload) | |
68 | { | |
69 | int ret; | |
70 | size_t pattern_len, filter_expression_len; | |
213efb0c JR |
71 | struct lttng_event_rule_kernel_syscall *syscall; |
72 | struct lttng_event_rule_kernel_syscall_comm syscall_comm; | |
e6a39346 JR |
73 | |
74 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule)) { | |
75 | ret = -1; | |
76 | goto end; | |
77 | } | |
78 | ||
79 | DBG("Serializing syscall event rule"); | |
213efb0c | 80 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
81 | |
82 | pattern_len = strlen(syscall->pattern) + 1; | |
83 | ||
84 | if (syscall->filter_expression != NULL) { | |
85 | filter_expression_len = strlen(syscall->filter_expression) + 1; | |
86 | } else { | |
87 | filter_expression_len = 0; | |
88 | } | |
89 | ||
90 | syscall_comm.pattern_len = pattern_len; | |
91 | syscall_comm.filter_expression_len = filter_expression_len; | |
bc16a30d | 92 | syscall_comm.emission_site = syscall->emission_site; |
e6a39346 JR |
93 | |
94 | ret = lttng_dynamic_buffer_append( | |
95 | &payload->buffer, &syscall_comm, sizeof(syscall_comm)); | |
96 | if (ret) { | |
97 | goto end; | |
98 | } | |
99 | ||
100 | ret = lttng_dynamic_buffer_append( | |
101 | &payload->buffer, syscall->pattern, pattern_len); | |
102 | if (ret) { | |
103 | goto end; | |
104 | } | |
105 | ||
106 | ret = lttng_dynamic_buffer_append(&payload->buffer, | |
107 | syscall->filter_expression, filter_expression_len); | |
108 | end: | |
109 | return ret; | |
110 | } | |
111 | ||
213efb0c | 112 | static bool lttng_event_rule_kernel_syscall_is_equal(const struct lttng_event_rule *_a, |
e6a39346 JR |
113 | const struct lttng_event_rule *_b) |
114 | { | |
115 | bool is_equal = false; | |
213efb0c | 116 | struct lttng_event_rule_kernel_syscall *a, *b; |
e6a39346 | 117 | |
213efb0c JR |
118 | a = container_of(_a, struct lttng_event_rule_kernel_syscall, parent); |
119 | b = container_of(_b, struct lttng_event_rule_kernel_syscall, parent); | |
e6a39346 JR |
120 | |
121 | if (!!a->filter_expression != !!b->filter_expression) { | |
122 | goto end; | |
123 | } | |
124 | ||
125 | assert(a->pattern); | |
126 | assert(b->pattern); | |
127 | if (strcmp(a->pattern, b->pattern)) { | |
128 | goto end; | |
129 | } | |
130 | ||
131 | if (a->filter_expression && b->filter_expression) { | |
132 | if (strcmp(a->filter_expression, b->filter_expression)) { | |
133 | goto end; | |
134 | } | |
135 | } else if (!!a->filter_expression != !!b->filter_expression) { | |
136 | /* One is set and not the other. */ | |
137 | goto end; | |
138 | } | |
139 | ||
140 | is_equal = true; | |
141 | end: | |
142 | return is_equal; | |
143 | } | |
144 | ||
213efb0c | 145 | static enum lttng_error_code lttng_event_rule_kernel_syscall_generate_filter_bytecode( |
58daac01 JR |
146 | struct lttng_event_rule *rule, |
147 | const struct lttng_credentials *creds) | |
e6a39346 JR |
148 | { |
149 | int ret; | |
150 | enum lttng_error_code ret_code = LTTNG_OK; | |
213efb0c | 151 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
152 | enum lttng_event_rule_status status; |
153 | const char *filter; | |
2b00d462 | 154 | struct lttng_bytecode *bytecode = NULL; |
e6a39346 JR |
155 | |
156 | assert(rule); | |
157 | ||
213efb0c | 158 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
159 | |
160 | /* Generate the filter bytecode. */ | |
213efb0c | 161 | status = lttng_event_rule_kernel_syscall_get_filter(rule, &filter); |
e6a39346 JR |
162 | if (status == LTTNG_EVENT_RULE_STATUS_UNSET) { |
163 | filter = NULL; | |
164 | } else if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
165 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
166 | goto end; | |
167 | } | |
168 | ||
169 | if (filter && filter[0] == '\0') { | |
170 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
171 | goto end; | |
172 | } | |
173 | ||
174 | if (filter == NULL) { | |
175 | /* Nothing to do. */ | |
176 | ret = LTTNG_OK; | |
177 | goto end; | |
178 | } | |
179 | ||
180 | syscall->internal_filter.filter = strdup(filter); | |
181 | if (syscall->internal_filter.filter == NULL) { | |
182 | ret_code = LTTNG_ERR_NOMEM; | |
183 | goto end; | |
184 | } | |
185 | ||
186 | ret = run_as_generate_filter_bytecode( | |
58daac01 | 187 | syscall->internal_filter.filter, creds, &bytecode); |
e6a39346 JR |
188 | if (ret) { |
189 | ret_code = LTTNG_ERR_FILTER_INVAL; | |
190 | } | |
191 | ||
192 | syscall->internal_filter.bytecode = bytecode; | |
193 | bytecode = NULL; | |
194 | ||
195 | end: | |
196 | free(bytecode); | |
197 | return ret_code; | |
198 | } | |
199 | ||
213efb0c | 200 | static const char *lttng_event_rule_kernel_syscall_get_internal_filter( |
e6a39346 JR |
201 | const struct lttng_event_rule *rule) |
202 | { | |
213efb0c | 203 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
204 | |
205 | assert(rule); | |
213efb0c | 206 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
207 | |
208 | return syscall->internal_filter.filter; | |
209 | } | |
210 | ||
2b00d462 | 211 | static const struct lttng_bytecode * |
213efb0c | 212 | lttng_event_rule_kernel_syscall_get_internal_filter_bytecode( |
e6a39346 JR |
213 | const struct lttng_event_rule *rule) |
214 | { | |
213efb0c | 215 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
216 | |
217 | assert(rule); | |
213efb0c | 218 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
219 | |
220 | return syscall->internal_filter.bytecode; | |
221 | } | |
222 | ||
993578ff | 223 | static enum lttng_event_rule_generate_exclusions_status |
213efb0c | 224 | lttng_event_rule_kernel_syscall_generate_exclusions(const struct lttng_event_rule *rule, |
993578ff | 225 | struct lttng_event_exclusion **exclusions) |
e6a39346 | 226 | { |
993578ff JR |
227 | /* Unsupported. */ |
228 | *exclusions = NULL; | |
229 | return LTTNG_EVENT_RULE_GENERATE_EXCLUSIONS_STATUS_NONE; | |
e6a39346 JR |
230 | } |
231 | ||
959e3c66 | 232 | static unsigned long |
213efb0c | 233 | lttng_event_rule_kernel_syscall_hash( |
959e3c66 JR |
234 | const struct lttng_event_rule *rule) |
235 | { | |
236 | unsigned long hash; | |
213efb0c | 237 | struct lttng_event_rule_kernel_syscall *syscall_rule = |
959e3c66 JR |
238 | container_of(rule, typeof(*syscall_rule), parent); |
239 | ||
213efb0c | 240 | hash = hash_key_ulong((void *) LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL, |
959e3c66 JR |
241 | lttng_ht_seed); |
242 | hash ^= hash_key_str(syscall_rule->pattern, lttng_ht_seed); | |
243 | if (syscall_rule->filter_expression) { | |
244 | hash ^= hash_key_str(syscall_rule->filter_expression, | |
245 | lttng_ht_seed); | |
246 | } | |
247 | ||
248 | return hash; | |
249 | } | |
250 | ||
0f7c2963 JR |
251 | static enum lttng_error_code lttng_event_rule_kernel_syscall_mi_serialize( |
252 | const struct lttng_event_rule *rule, struct mi_writer *writer) | |
253 | { | |
254 | int ret; | |
255 | enum lttng_error_code ret_code; | |
256 | enum lttng_event_rule_status status; | |
257 | ||
258 | enum lttng_event_rule_kernel_syscall_emission_site site_type; | |
259 | const char *filter = NULL; | |
260 | const char *name_pattern = NULL; | |
261 | const char *site_type_str = NULL; | |
262 | ||
263 | assert(rule); | |
264 | assert(writer); | |
265 | assert(IS_SYSCALL_EVENT_RULE(rule)); | |
266 | ||
267 | status = lttng_event_rule_kernel_syscall_get_name_pattern( | |
268 | rule, &name_pattern); | |
269 | assert(status == LTTNG_EVENT_RULE_STATUS_OK); | |
270 | assert(name_pattern); | |
271 | ||
272 | status = lttng_event_rule_kernel_syscall_get_filter(rule, &filter); | |
273 | assert(status == LTTNG_EVENT_RULE_STATUS_OK || | |
274 | status == LTTNG_EVENT_RULE_STATUS_UNSET); | |
275 | ||
276 | site_type = lttng_event_rule_kernel_syscall_get_emission_site(rule); | |
277 | ||
278 | switch (site_type) { | |
279 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY_EXIT: | |
280 | site_type_str = mi_lttng_event_rule_kernel_syscall_emission_site_entry_exit; | |
281 | break; | |
282 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY: | |
283 | site_type_str = mi_lttng_event_rule_kernel_syscall_emission_site_entry; | |
284 | break; | |
285 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_EXIT: | |
286 | site_type_str = mi_lttng_event_rule_kernel_syscall_emission_site_exit; | |
287 | break; | |
288 | default: | |
289 | abort(); | |
290 | break; | |
291 | } | |
292 | ||
293 | /* Open event rule kernel syscall element. */ | |
294 | ret = mi_lttng_writer_open_element( | |
295 | writer, mi_lttng_element_event_rule_kernel_syscall); | |
296 | if (ret) { | |
297 | goto mi_error; | |
298 | } | |
299 | ||
300 | /* Emission site. */ | |
301 | ret = mi_lttng_writer_write_element_string(writer, | |
302 | mi_lttng_element_event_rule_kernel_syscall_emission_site, | |
303 | site_type_str); | |
304 | if (ret) { | |
305 | goto mi_error; | |
306 | } | |
307 | ||
308 | /* Name pattern. */ | |
309 | ret = mi_lttng_writer_write_element_string(writer, | |
310 | mi_lttng_element_event_rule_name_pattern, name_pattern); | |
311 | if (ret) { | |
312 | goto mi_error; | |
313 | } | |
314 | ||
315 | /* Filter. */ | |
316 | if (filter != NULL) { | |
317 | ret = mi_lttng_writer_write_element_string(writer, | |
318 | mi_lttng_element_event_rule_filter_expression, | |
319 | filter); | |
320 | if (ret) { | |
321 | goto mi_error; | |
322 | } | |
323 | } | |
324 | ||
325 | /* Close event rule kernel syscall. */ | |
326 | ret = mi_lttng_writer_close_element(writer); | |
327 | if (ret) { | |
328 | goto mi_error; | |
329 | } | |
330 | ||
331 | ret_code = LTTNG_OK; | |
332 | goto end; | |
333 | ||
334 | mi_error: | |
335 | ret_code = LTTNG_ERR_MI_IO_FAIL; | |
336 | end: | |
337 | return ret_code; | |
338 | } | |
339 | ||
213efb0c JR |
340 | struct lttng_event_rule *lttng_event_rule_kernel_syscall_create( |
341 | enum lttng_event_rule_kernel_syscall_emission_site | |
bc16a30d | 342 | emission_site) |
e6a39346 JR |
343 | { |
344 | struct lttng_event_rule *rule = NULL; | |
213efb0c | 345 | struct lttng_event_rule_kernel_syscall *syscall_rule; |
67d38b93 | 346 | enum lttng_event_rule_status status; |
e6a39346 | 347 | |
57739a6b | 348 | /* Validate the emission site type */ |
bc16a30d | 349 | switch (emission_site) { |
213efb0c JR |
350 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY_EXIT: |
351 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY: | |
352 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_EXIT: | |
57739a6b JR |
353 | break; |
354 | default: | |
355 | /* Invalid emission type */ | |
356 | goto end; | |
357 | } | |
358 | ||
213efb0c | 359 | syscall_rule = zmalloc(sizeof(struct lttng_event_rule_kernel_syscall)); |
e6a39346 JR |
360 | if (!syscall_rule) { |
361 | goto end; | |
362 | } | |
363 | ||
364 | rule = &syscall_rule->parent; | |
365 | lttng_event_rule_init( | |
213efb0c JR |
366 | &syscall_rule->parent, LTTNG_EVENT_RULE_TYPE_KERNEL_SYSCALL); |
367 | syscall_rule->parent.validate = lttng_event_rule_kernel_syscall_validate; | |
368 | syscall_rule->parent.serialize = lttng_event_rule_kernel_syscall_serialize; | |
369 | syscall_rule->parent.equal = lttng_event_rule_kernel_syscall_is_equal; | |
370 | syscall_rule->parent.destroy = lttng_event_rule_kernel_syscall_destroy; | |
e6a39346 | 371 | syscall_rule->parent.generate_filter_bytecode = |
213efb0c | 372 | lttng_event_rule_kernel_syscall_generate_filter_bytecode; |
e6a39346 | 373 | syscall_rule->parent.get_filter = |
213efb0c | 374 | lttng_event_rule_kernel_syscall_get_internal_filter; |
e6a39346 | 375 | syscall_rule->parent.get_filter_bytecode = |
213efb0c | 376 | lttng_event_rule_kernel_syscall_get_internal_filter_bytecode; |
e6a39346 | 377 | syscall_rule->parent.generate_exclusions = |
213efb0c JR |
378 | lttng_event_rule_kernel_syscall_generate_exclusions; |
379 | syscall_rule->parent.hash = lttng_event_rule_kernel_syscall_hash; | |
0f7c2963 | 380 | syscall_rule->parent.mi_serialize = lttng_event_rule_kernel_syscall_mi_serialize; |
67d38b93 JR |
381 | |
382 | /* Default pattern is '*'. */ | |
213efb0c | 383 | status = lttng_event_rule_kernel_syscall_set_name_pattern(rule, "*"); |
67d38b93 JR |
384 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
385 | lttng_event_rule_destroy(rule); | |
386 | rule = NULL; | |
387 | } | |
388 | ||
57739a6b | 389 | /* Emission site type */ |
bc16a30d | 390 | syscall_rule->emission_site = emission_site; |
57739a6b | 391 | |
e6a39346 JR |
392 | end: |
393 | return rule; | |
394 | } | |
395 | ||
396 | LTTNG_HIDDEN | |
213efb0c | 397 | ssize_t lttng_event_rule_kernel_syscall_create_from_payload( |
e6a39346 JR |
398 | struct lttng_payload_view *view, |
399 | struct lttng_event_rule **_event_rule) | |
400 | { | |
401 | ssize_t ret, offset = 0; | |
402 | enum lttng_event_rule_status status; | |
213efb0c | 403 | const struct lttng_event_rule_kernel_syscall_comm *syscall_comm; |
e6a39346 JR |
404 | const char *pattern; |
405 | const char *filter_expression = NULL; | |
406 | struct lttng_buffer_view current_buffer_view; | |
407 | struct lttng_event_rule *rule = NULL; | |
408 | ||
409 | if (!_event_rule) { | |
410 | ret = -1; | |
411 | goto end; | |
412 | } | |
413 | ||
414 | if (view->buffer.size < sizeof(*syscall_comm)) { | |
415 | ERR("Failed to initialize from malformed event rule syscall: buffer too short to contain header"); | |
416 | ret = -1; | |
417 | goto end; | |
418 | } | |
419 | ||
420 | current_buffer_view = lttng_buffer_view_from_view( | |
421 | &view->buffer, offset, sizeof(*syscall_comm)); | |
3e6e0df2 | 422 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
e6a39346 JR |
423 | ret = -1; |
424 | goto end; | |
425 | } | |
426 | ||
3e6e0df2 | 427 | syscall_comm = (typeof(syscall_comm)) current_buffer_view.data; |
213efb0c | 428 | rule = lttng_event_rule_kernel_syscall_create(syscall_comm->emission_site); |
e6a39346 JR |
429 | if (!rule) { |
430 | ERR("Failed to create event rule syscall"); | |
431 | ret = -1; | |
432 | goto end; | |
433 | } | |
434 | ||
435 | /* Skip to payload. */ | |
436 | offset += current_buffer_view.size; | |
437 | ||
438 | /* Map the pattern. */ | |
439 | current_buffer_view = lttng_buffer_view_from_view( | |
440 | &view->buffer, offset, syscall_comm->pattern_len); | |
3e6e0df2 | 441 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
e6a39346 JR |
442 | ret = -1; |
443 | goto end; | |
444 | } | |
445 | ||
3e6e0df2 | 446 | pattern = current_buffer_view.data; |
e6a39346 JR |
447 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, pattern, |
448 | syscall_comm->pattern_len)) { | |
449 | ret = -1; | |
450 | goto end; | |
451 | } | |
452 | ||
453 | /* Skip after the pattern. */ | |
454 | offset += syscall_comm->pattern_len; | |
455 | ||
456 | if (!syscall_comm->filter_expression_len) { | |
457 | goto skip_filter_expression; | |
458 | } | |
459 | ||
460 | /* Map the filter_expression. */ | |
461 | current_buffer_view = lttng_buffer_view_from_view(&view->buffer, offset, | |
462 | syscall_comm->filter_expression_len); | |
3e6e0df2 | 463 | if (!lttng_buffer_view_is_valid(¤t_buffer_view)) { |
e6a39346 JR |
464 | ret = -1; |
465 | goto end; | |
466 | } | |
467 | ||
3e6e0df2 | 468 | filter_expression = current_buffer_view.data; |
e6a39346 JR |
469 | if (!lttng_buffer_view_contains_string(¤t_buffer_view, |
470 | filter_expression, | |
471 | syscall_comm->filter_expression_len)) { | |
472 | ret = -1; | |
473 | goto end; | |
474 | } | |
475 | ||
476 | /* Skip after the pattern. */ | |
477 | offset += syscall_comm->filter_expression_len; | |
478 | ||
479 | skip_filter_expression: | |
480 | ||
213efb0c | 481 | status = lttng_event_rule_kernel_syscall_set_name_pattern(rule, pattern); |
e6a39346 JR |
482 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { |
483 | ERR("Failed to set event rule syscall pattern"); | |
484 | ret = -1; | |
485 | goto end; | |
486 | } | |
487 | ||
488 | if (filter_expression) { | |
213efb0c | 489 | status = lttng_event_rule_kernel_syscall_set_filter( |
e6a39346 JR |
490 | rule, filter_expression); |
491 | if (status != LTTNG_EVENT_RULE_STATUS_OK) { | |
492 | ERR("Failed to set event rule syscall pattern"); | |
493 | ret = -1; | |
494 | goto end; | |
495 | } | |
496 | } | |
497 | ||
498 | *_event_rule = rule; | |
499 | rule = NULL; | |
500 | ret = offset; | |
501 | end: | |
502 | lttng_event_rule_destroy(rule); | |
503 | return ret; | |
504 | } | |
505 | ||
213efb0c | 506 | enum lttng_event_rule_status lttng_event_rule_kernel_syscall_set_name_pattern( |
e6a39346 JR |
507 | struct lttng_event_rule *rule, const char *pattern) |
508 | { | |
509 | char *pattern_copy = NULL; | |
213efb0c | 510 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
511 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
512 | ||
513 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule) || !pattern || | |
514 | strlen(pattern) == 0) { | |
515 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
516 | goto end; | |
517 | } | |
518 | ||
213efb0c | 519 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
520 | pattern_copy = strdup(pattern); |
521 | if (!pattern_copy) { | |
522 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
523 | goto end; | |
524 | } | |
525 | ||
40fd2ccf JR |
526 | strutils_normalize_star_glob_pattern(pattern_copy); |
527 | ||
528 | free(syscall->pattern); | |
e6a39346 JR |
529 | |
530 | syscall->pattern = pattern_copy; | |
531 | pattern_copy = NULL; | |
532 | end: | |
533 | return status; | |
534 | } | |
535 | ||
213efb0c | 536 | enum lttng_event_rule_status lttng_event_rule_kernel_syscall_get_name_pattern( |
e6a39346 JR |
537 | const struct lttng_event_rule *rule, const char **pattern) |
538 | { | |
213efb0c | 539 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
540 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
541 | ||
542 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule) || !pattern) { | |
543 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
544 | goto end; | |
545 | } | |
546 | ||
213efb0c | 547 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
548 | if (!syscall->pattern) { |
549 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
550 | goto end; | |
551 | } | |
552 | ||
553 | *pattern = syscall->pattern; | |
554 | end: | |
555 | return status; | |
556 | } | |
557 | ||
213efb0c | 558 | enum lttng_event_rule_status lttng_event_rule_kernel_syscall_set_filter( |
e6a39346 JR |
559 | struct lttng_event_rule *rule, const char *expression) |
560 | { | |
561 | char *expression_copy = NULL; | |
213efb0c | 562 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
563 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
564 | ||
565 | /* TODO: validate that the passed expression is valid. */ | |
566 | ||
567 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule) || !expression || | |
568 | strlen(expression) == 0) { | |
569 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
570 | goto end; | |
571 | } | |
572 | ||
213efb0c | 573 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
574 | expression_copy = strdup(expression); |
575 | if (!expression_copy) { | |
576 | status = LTTNG_EVENT_RULE_STATUS_ERROR; | |
577 | goto end; | |
578 | } | |
579 | ||
580 | if (syscall->filter_expression) { | |
581 | free(syscall->filter_expression); | |
582 | } | |
583 | ||
584 | syscall->filter_expression = expression_copy; | |
585 | expression_copy = NULL; | |
586 | end: | |
587 | return status; | |
588 | } | |
589 | ||
213efb0c | 590 | enum lttng_event_rule_status lttng_event_rule_kernel_syscall_get_filter( |
e6a39346 JR |
591 | const struct lttng_event_rule *rule, const char **expression) |
592 | { | |
213efb0c | 593 | struct lttng_event_rule_kernel_syscall *syscall; |
e6a39346 JR |
594 | enum lttng_event_rule_status status = LTTNG_EVENT_RULE_STATUS_OK; |
595 | ||
596 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule) || !expression) { | |
597 | status = LTTNG_EVENT_RULE_STATUS_INVALID; | |
598 | goto end; | |
599 | } | |
600 | ||
213efb0c | 601 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
e6a39346 JR |
602 | if (!syscall->filter_expression) { |
603 | status = LTTNG_EVENT_RULE_STATUS_UNSET; | |
604 | goto end; | |
605 | } | |
606 | ||
607 | *expression = syscall->filter_expression; | |
608 | end: | |
609 | return status; | |
610 | } | |
213efb0c JR |
611 | extern enum lttng_event_rule_kernel_syscall_emission_site |
612 | lttng_event_rule_kernel_syscall_get_emission_site( | |
57739a6b JR |
613 | const struct lttng_event_rule *rule) |
614 | { | |
213efb0c JR |
615 | enum lttng_event_rule_kernel_syscall_emission_site emission_site = |
616 | LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_UNKNOWN; | |
617 | struct lttng_event_rule_kernel_syscall *syscall; | |
57739a6b JR |
618 | |
619 | if (!rule || !IS_SYSCALL_EVENT_RULE(rule)) { | |
620 | goto end; | |
621 | } | |
622 | ||
213efb0c | 623 | syscall = container_of(rule, struct lttng_event_rule_kernel_syscall, parent); |
bc16a30d | 624 | emission_site = syscall->emission_site; |
57739a6b JR |
625 | |
626 | end: | |
bc16a30d | 627 | return emission_site; |
57739a6b JR |
628 | } |
629 | ||
630 | LTTNG_HIDDEN | |
213efb0c JR |
631 | const char *lttng_event_rule_kernel_syscall_emission_site_str( |
632 | enum lttng_event_rule_kernel_syscall_emission_site emission_site) | |
57739a6b | 633 | { |
bc16a30d | 634 | switch (emission_site) { |
213efb0c | 635 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY: |
57739a6b | 636 | return "entry"; |
213efb0c | 637 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_ENTRY_EXIT: |
57739a6b | 638 | return "entry+exit"; |
213efb0c | 639 | case LTTNG_EVENT_RULE_KERNEL_SYSCALL_EMISSION_SITE_EXIT: |
57739a6b JR |
640 | return "exit"; |
641 | default: | |
642 | return "???"; | |
643 | } | |
644 | } |