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4624dad0 SM |
1 | /* |
2 | * Copyright (C) 2021 Simon Marchi <simon.marchi@efficios.com> | |
3 | * | |
4 | * SPDX-License-Identifier: GPL-2.0-only | |
5 | * | |
6 | */ | |
7 | ||
8 | #include <ctype.h> | |
9 | #include <stdio.h> | |
10 | ||
11 | #include "../command.h" | |
12 | #include "../loglevel.h" | |
13 | #include "../uprobe.h" | |
14 | ||
15 | #include "common/argpar/argpar.h" | |
16 | #include "common/dynamic-array.h" | |
17 | #include "common/string-utils/string-utils.h" | |
18 | #include "common/utils.h" | |
19 | /* For lttng_event_rule_type_str(). */ | |
20 | #include <lttng/event-rule/event-rule-internal.h> | |
21 | #include <lttng/lttng.h> | |
20a01d15 SM |
22 | #include "common/filter/filter-ast.h" |
23 | #include "common/filter/filter-ir.h" | |
24 | #include "common/dynamic-array.h" | |
4624dad0 SM |
25 | |
26 | #if (LTTNG_SYMBOL_NAME_LEN == 256) | |
27 | #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255" | |
28 | #endif | |
29 | ||
30 | #ifdef LTTNG_EMBED_HELP | |
31 | static const char help_msg[] = | |
32 | #include <lttng-add-trigger.1.h> | |
33 | ; | |
34 | #endif | |
35 | ||
36 | enum { | |
37 | OPT_HELP, | |
38 | OPT_LIST_OPTIONS, | |
39 | ||
40 | OPT_CONDITION, | |
41 | OPT_ACTION, | |
42 | OPT_ID, | |
43 | OPT_FIRE_ONCE_AFTER, | |
44 | OPT_FIRE_EVERY, | |
45 | OPT_USER_ID, | |
46 | ||
47 | OPT_ALL, | |
48 | OPT_FILTER, | |
49 | OPT_EXCLUDE, | |
50 | OPT_LOGLEVEL, | |
51 | OPT_LOGLEVEL_ONLY, | |
52 | ||
53 | OPT_USERSPACE, | |
54 | OPT_KERNEL, | |
55 | OPT_LOG4J, | |
56 | OPT_JUL, | |
57 | OPT_PYTHON, | |
58 | ||
59 | OPT_FUNCTION, | |
60 | OPT_PROBE, | |
61 | OPT_USERSPACE_PROBE, | |
62 | OPT_SYSCALL, | |
63 | OPT_TRACEPOINT, | |
64 | ||
65 | OPT_NAME, | |
66 | OPT_MAX_SIZE, | |
67 | OPT_DATA_URL, | |
68 | OPT_CTRL_URL, | |
69 | OPT_URL, | |
70 | OPT_PATH, | |
20a01d15 SM |
71 | |
72 | OPT_CAPTURE, | |
4624dad0 SM |
73 | }; |
74 | ||
75 | static const struct argpar_opt_descr event_rule_opt_descrs[] = { | |
76 | { OPT_ALL, 'a', "all", false }, | |
77 | { OPT_FILTER, 'f', "filter", true }, | |
78 | { OPT_EXCLUDE, 'x', "exclude", true }, | |
79 | { OPT_LOGLEVEL, '\0', "loglevel", true }, | |
80 | { OPT_LOGLEVEL_ONLY, '\0', "loglevel-only", true }, | |
81 | ||
82 | /* Domains */ | |
83 | { OPT_USERSPACE, 'u', "userspace", false }, | |
84 | { OPT_KERNEL, 'k', "kernel", false }, | |
85 | { OPT_LOG4J, 'l', "log4j", false }, | |
86 | { OPT_JUL, 'j', "jul", false }, | |
87 | { OPT_PYTHON, 'p', "python", false }, | |
88 | ||
89 | /* Event rule types */ | |
90 | { OPT_FUNCTION, '\0', "function", true }, | |
91 | { OPT_PROBE, '\0', "probe", true }, | |
92 | { OPT_USERSPACE_PROBE, '\0', "userspace-probe", true }, | |
93 | { OPT_SYSCALL, '\0', "syscall" }, | |
94 | { OPT_TRACEPOINT, '\0', "tracepoint" }, | |
95 | ||
20a01d15 SM |
96 | /* Capture descriptor */ |
97 | { OPT_CAPTURE, '\0', "capture", true }, | |
98 | ||
4624dad0 SM |
99 | ARGPAR_OPT_DESCR_SENTINEL |
100 | }; | |
101 | ||
102 | static | |
103 | bool assign_domain_type(enum lttng_domain_type *dest, | |
104 | enum lttng_domain_type src) | |
105 | { | |
106 | bool ret; | |
107 | ||
108 | if (*dest == LTTNG_DOMAIN_NONE || *dest == src) { | |
109 | *dest = src; | |
110 | ret = true; | |
111 | } else { | |
112 | ERR("Multiple domains specified."); | |
113 | ret = false; | |
114 | } | |
115 | ||
116 | return ret; | |
117 | } | |
118 | ||
119 | static | |
120 | bool assign_event_rule_type(enum lttng_event_rule_type *dest, | |
121 | enum lttng_event_rule_type src) | |
122 | { | |
123 | bool ret; | |
124 | ||
125 | if (*dest == LTTNG_EVENT_RULE_TYPE_UNKNOWN || *dest == src) { | |
126 | *dest = src; | |
127 | ret = true; | |
128 | } else { | |
129 | ERR("Multiple event types specified."); | |
130 | ret = false; | |
131 | } | |
132 | ||
133 | return ret; | |
134 | } | |
135 | ||
136 | static | |
137 | bool assign_string(char **dest, const char *src, const char *opt_name) | |
138 | { | |
139 | bool ret; | |
140 | ||
141 | if (*dest) { | |
142 | ERR("Duplicate '%s' given.", opt_name); | |
143 | goto error; | |
144 | } | |
145 | ||
146 | *dest = strdup(src); | |
147 | if (!*dest) { | |
148 | PERROR("Failed to allocate string '%s'.", opt_name); | |
149 | goto error; | |
150 | } | |
151 | ||
152 | ret = true; | |
153 | goto end; | |
154 | ||
155 | error: | |
156 | ret = false; | |
157 | ||
158 | end: | |
159 | return ret; | |
160 | } | |
161 | ||
162 | /* This is defined in enable_events.c. */ | |
163 | LTTNG_HIDDEN | |
164 | int create_exclusion_list_and_validate(const char *event_name, | |
165 | const char *exclusions_arg, | |
166 | char ***exclusion_list); | |
167 | ||
168 | /* | |
169 | * Parse `str` as a log level in domain `domain_type`. Return -1 if the string | |
170 | * is not recognized as a valid log level. | |
171 | */ | |
172 | static | |
173 | int parse_loglevel_string(const char *str, enum lttng_domain_type domain_type) | |
174 | { | |
175 | switch (domain_type) { | |
176 | case LTTNG_DOMAIN_UST: | |
177 | { | |
178 | enum lttng_loglevel loglevel; | |
179 | const int ret = loglevel_name_to_value(str, &loglevel); | |
180 | ||
181 | return ret == -1 ? ret : (int) loglevel; | |
182 | } | |
183 | case LTTNG_DOMAIN_LOG4J: | |
184 | { | |
185 | enum lttng_loglevel_log4j loglevel; | |
186 | const int ret = loglevel_log4j_name_to_value(str, &loglevel); | |
187 | ||
188 | return ret == -1 ? ret : (int) loglevel; | |
189 | } | |
190 | case LTTNG_DOMAIN_JUL: | |
191 | { | |
192 | enum lttng_loglevel_jul loglevel; | |
193 | const int ret = loglevel_jul_name_to_value(str, &loglevel); | |
194 | ||
195 | return ret == -1 ? ret : (int) loglevel; | |
196 | } | |
197 | case LTTNG_DOMAIN_PYTHON: | |
198 | { | |
199 | enum lttng_loglevel_python loglevel; | |
200 | const int ret = loglevel_python_name_to_value(str, &loglevel); | |
201 | ||
202 | return ret == -1 ? ret : (int) loglevel; | |
203 | } | |
204 | default: | |
205 | /* Invalid domain type. */ | |
206 | abort(); | |
207 | } | |
208 | } | |
209 | ||
210 | static int parse_kernel_probe_opts(const char *source, | |
211 | struct lttng_kernel_probe_location **location) | |
212 | { | |
213 | int ret = 0; | |
214 | int match; | |
215 | char s_hex[19]; | |
216 | char name[LTTNG_SYMBOL_NAME_LEN]; | |
217 | char *symbol_name = NULL; | |
218 | uint64_t offset; | |
219 | ||
220 | /* Check for symbol+offset. */ | |
221 | match = sscanf(source, | |
222 | "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API | |
223 | "[^'+']+%18s", | |
224 | name, s_hex); | |
225 | if (match == 2) { | |
226 | if (*s_hex == '\0') { | |
227 | ERR("Kernel probe symbol offset is missing."); | |
228 | goto error; | |
229 | } | |
230 | ||
231 | symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN); | |
232 | if (!symbol_name) { | |
233 | PERROR("Failed to copy kernel probe location symbol name."); | |
234 | goto error; | |
235 | } | |
236 | offset = strtoul(s_hex, NULL, 0); | |
237 | ||
238 | *location = lttng_kernel_probe_location_symbol_create( | |
239 | symbol_name, offset); | |
f6e30a8a | 240 | if (!*location) { |
4624dad0 SM |
241 | ERR("Failed to create symbol kernel probe location."); |
242 | goto error; | |
243 | } | |
244 | ||
245 | goto end; | |
246 | } | |
247 | ||
248 | /* Check for symbol. */ | |
249 | if (isalpha(name[0]) || name[0] == '_') { | |
250 | match = sscanf(source, | |
251 | "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API | |
252 | "s", | |
253 | name); | |
254 | if (match == 1) { | |
255 | symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN); | |
256 | if (!symbol_name) { | |
257 | ERR("Failed to copy kernel probe location symbol name."); | |
258 | goto error; | |
259 | } | |
260 | ||
261 | *location = lttng_kernel_probe_location_symbol_create( | |
262 | symbol_name, 0); | |
14f27f79 | 263 | if (!*location) { |
4624dad0 SM |
264 | ERR("Failed to create symbol kernel probe location."); |
265 | goto error; | |
266 | } | |
267 | ||
268 | goto end; | |
269 | } | |
270 | } | |
271 | ||
272 | /* Check for address. */ | |
273 | match = sscanf(source, "%18s", s_hex); | |
274 | if (match > 0) { | |
275 | uint64_t address; | |
276 | ||
277 | if (*s_hex == '\0') { | |
278 | ERR("Invalid kernel probe location address."); | |
279 | goto error; | |
280 | } | |
281 | ||
282 | address = strtoul(s_hex, NULL, 0); | |
283 | *location = lttng_kernel_probe_location_address_create(address); | |
5c6ca809 | 284 | if (!*location) { |
4624dad0 SM |
285 | ERR("Failed to create symbol kernel probe location."); |
286 | goto error; | |
287 | } | |
288 | ||
289 | goto end; | |
290 | } | |
291 | ||
292 | error: | |
293 | /* No match */ | |
294 | ret = -1; | |
295 | *location = NULL; | |
296 | ||
297 | end: | |
298 | free(symbol_name); | |
299 | return ret; | |
300 | } | |
301 | ||
20a01d15 SM |
302 | static |
303 | struct lttng_event_expr *ir_op_load_expr_to_event_expr( | |
304 | const struct ir_load_expression *load_exp, const char *capture_str) | |
305 | { | |
306 | char *provider_name = NULL; | |
307 | struct lttng_event_expr *event_expr = NULL; | |
308 | const struct ir_load_expression_op *load_expr_op = load_exp->child; | |
309 | ||
310 | switch (load_expr_op->type) { | |
311 | case IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT: | |
312 | case IR_LOAD_EXPRESSION_GET_CONTEXT_ROOT: | |
313 | { | |
314 | const char *field_name; | |
315 | ||
316 | load_expr_op = load_expr_op->next; | |
317 | assert(load_expr_op); | |
318 | assert(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL); | |
319 | field_name = load_expr_op->u.symbol; | |
320 | assert(field_name); | |
321 | ||
322 | event_expr = load_expr_op->type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ? | |
323 | lttng_event_expr_event_payload_field_create(field_name) : | |
324 | lttng_event_expr_channel_context_field_create(field_name); | |
325 | if (!event_expr) { | |
326 | ERR("Failed to create %s event expression: field name = `%s`.", | |
327 | load_expr_op->type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ? | |
328 | "payload field" : "channel context", | |
329 | field_name); | |
330 | goto error; | |
331 | } | |
332 | ||
333 | break; | |
334 | } | |
335 | case IR_LOAD_EXPRESSION_GET_APP_CONTEXT_ROOT: | |
336 | { | |
337 | const char *colon; | |
338 | const char *type_name; | |
339 | const char *field_name; | |
340 | ||
341 | load_expr_op = load_expr_op->next; | |
342 | assert(load_expr_op); | |
343 | assert(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL); | |
344 | field_name = load_expr_op->u.symbol; | |
345 | assert(field_name); | |
346 | ||
347 | /* | |
348 | * The field name needs to be of the form PROVIDER:TYPE. We | |
349 | * split it here. | |
350 | */ | |
351 | colon = strchr(field_name, ':'); | |
352 | if (!colon) { | |
353 | ERR("Invalid app-specific context field name: missing colon in `%s`.", | |
354 | field_name); | |
355 | goto error; | |
356 | } | |
357 | ||
358 | type_name = colon + 1; | |
359 | if (*type_name == '\0') { | |
360 | ERR("Invalid app-specific context field name: missing type name after colon in `%s`.", | |
361 | field_name); | |
362 | goto error; | |
363 | } | |
364 | ||
365 | provider_name = strndup(field_name, colon - field_name); | |
366 | if (!provider_name) { | |
367 | PERROR("Failed to allocate field name string"); | |
368 | goto error; | |
369 | } | |
370 | ||
371 | event_expr = lttng_event_expr_app_specific_context_field_create( | |
372 | provider_name, type_name); | |
373 | if (!event_expr) { | |
374 | ERR("Failed to create app-specific context field event expression: provider name = `%s`, type name = `%s`", | |
375 | provider_name, type_name); | |
376 | goto error; | |
377 | } | |
378 | ||
379 | break; | |
380 | } | |
381 | default: | |
382 | ERR("%s: unexpected load expr type %d.", __func__, | |
383 | load_expr_op->type); | |
384 | abort(); | |
385 | } | |
386 | ||
387 | load_expr_op = load_expr_op->next; | |
388 | ||
389 | /* There may be a single array index after that. */ | |
390 | if (load_expr_op->type == IR_LOAD_EXPRESSION_GET_INDEX) { | |
391 | struct lttng_event_expr *index_event_expr; | |
392 | const uint64_t index = load_expr_op->u.index; | |
393 | ||
394 | index_event_expr = lttng_event_expr_array_field_element_create(event_expr, index); | |
395 | if (!index_event_expr) { | |
396 | ERR("Failed to create array field element event expression."); | |
397 | goto error; | |
398 | } | |
399 | ||
400 | event_expr = index_event_expr; | |
401 | load_expr_op = load_expr_op->next; | |
402 | } | |
403 | ||
404 | switch (load_expr_op->type) { | |
405 | case IR_LOAD_EXPRESSION_LOAD_FIELD: | |
406 | /* | |
407 | * This is what we expect, IR_LOAD_EXPRESSION_LOAD_FIELD is | |
408 | * always found at the end of the chain. | |
409 | */ | |
410 | break; | |
411 | case IR_LOAD_EXPRESSION_GET_SYMBOL: | |
412 | ERR("While parsing expression `%s`: Capturing subfields is not supported.", | |
413 | capture_str); | |
414 | goto error; | |
415 | ||
416 | default: | |
417 | ERR("%s: unexpected load expression operator %s.", __func__, | |
418 | ir_load_expression_type_str(load_expr_op->type)); | |
419 | abort(); | |
420 | } | |
421 | ||
422 | goto end; | |
423 | ||
424 | error: | |
425 | lttng_event_expr_destroy(event_expr); | |
426 | event_expr = NULL; | |
427 | ||
428 | end: | |
429 | free(provider_name); | |
430 | ||
431 | return event_expr; | |
432 | } | |
433 | ||
434 | static | |
435 | struct lttng_event_expr *ir_op_load_to_event_expr( | |
436 | const struct ir_op *ir, const char *capture_str) | |
437 | { | |
438 | struct lttng_event_expr *event_expr = NULL; | |
439 | ||
440 | assert(ir->op == IR_OP_LOAD); | |
441 | ||
442 | switch (ir->data_type) { | |
443 | case IR_DATA_EXPRESSION: | |
444 | { | |
445 | const struct ir_load_expression *ir_load_expr = | |
446 | ir->u.load.u.expression; | |
447 | ||
448 | event_expr = ir_op_load_expr_to_event_expr( | |
449 | ir_load_expr, capture_str); | |
450 | break; | |
451 | } | |
452 | default: | |
453 | ERR("%s: unexpected data type: %s.", __func__, | |
454 | ir_data_type_str(ir->data_type)); | |
455 | abort(); | |
456 | } | |
457 | ||
458 | return event_expr; | |
459 | } | |
460 | ||
461 | static | |
462 | const char *ir_operator_type_human_str(enum ir_op_type op) | |
463 | { | |
464 | const char *name; | |
465 | ||
466 | switch (op) { | |
467 | case IR_OP_BINARY: | |
468 | name = "Binary"; | |
469 | break; | |
470 | case IR_OP_UNARY: | |
471 | name = "Unary"; | |
472 | break; | |
473 | case IR_OP_LOGICAL: | |
474 | name = "Logical"; | |
475 | break; | |
476 | default: | |
477 | abort(); | |
478 | } | |
479 | ||
480 | return name; | |
481 | } | |
482 | ||
483 | static | |
484 | struct lttng_event_expr *ir_op_root_to_event_expr(const struct ir_op *ir, | |
485 | const char *capture_str) | |
486 | { | |
487 | struct lttng_event_expr *event_expr = NULL; | |
488 | ||
489 | assert(ir->op == IR_OP_ROOT); | |
490 | ir = ir->u.root.child; | |
491 | ||
492 | switch (ir->op) { | |
493 | case IR_OP_LOAD: | |
494 | event_expr = ir_op_load_to_event_expr(ir, capture_str); | |
495 | break; | |
496 | case IR_OP_BINARY: | |
497 | case IR_OP_UNARY: | |
498 | case IR_OP_LOGICAL: | |
499 | ERR("While parsing expression `%s`: %s operators are not allowed in capture expressions.", | |
500 | capture_str, | |
501 | ir_operator_type_human_str(ir->op)); | |
502 | break; | |
503 | default: | |
504 | ERR("%s: unexpected IR op type: %s.", __func__, | |
505 | ir_op_type_str(ir->op)); | |
506 | abort(); | |
507 | } | |
508 | ||
509 | return event_expr; | |
510 | } | |
511 | ||
512 | static | |
513 | void destroy_event_expr(void *ptr) | |
514 | { | |
515 | lttng_event_expr_destroy(ptr); | |
516 | } | |
517 | ||
518 | struct parse_event_rule_res { | |
519 | /* Owned by this. */ | |
520 | struct lttng_event_rule *er; | |
521 | ||
522 | /* Array of `struct lttng_event_expr *` */ | |
523 | struct lttng_dynamic_pointer_array capture_descriptors; | |
524 | }; | |
525 | ||
526 | static | |
527 | struct parse_event_rule_res parse_event_rule(int *argc, const char ***argv) | |
4624dad0 | 528 | { |
4624dad0 SM |
529 | enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE; |
530 | enum lttng_event_rule_type event_rule_type = | |
531 | LTTNG_EVENT_RULE_TYPE_UNKNOWN; | |
532 | struct argpar_state *state; | |
533 | struct argpar_item *item = NULL; | |
534 | char *error = NULL; | |
535 | int consumed_args = -1; | |
536 | struct lttng_kernel_probe_location *kernel_probe_location = NULL; | |
537 | struct lttng_userspace_probe_location *userspace_probe_location = NULL; | |
20a01d15 SM |
538 | struct parse_event_rule_res res = { 0 }; |
539 | struct lttng_event_expr *event_expr = NULL; | |
540 | struct filter_parser_ctx *parser_ctx = NULL; | |
4624dad0 SM |
541 | |
542 | /* Was the -a/--all flag provided? */ | |
543 | bool all_events = false; | |
544 | ||
545 | /* Tracepoint name (non-option argument). */ | |
546 | const char *tracepoint_name = NULL; | |
547 | ||
548 | /* Holds the argument of --probe / --userspace-probe. */ | |
549 | char *source = NULL; | |
550 | ||
551 | /* Filter. */ | |
552 | char *filter = NULL; | |
553 | ||
554 | /* Exclude. */ | |
555 | char *exclude = NULL; | |
556 | char **exclusion_list = NULL; | |
557 | ||
558 | /* Log level. */ | |
559 | char *loglevel_str = NULL; | |
560 | bool loglevel_only = false; | |
561 | ||
20a01d15 SM |
562 | lttng_dynamic_pointer_array_init(&res.capture_descriptors, |
563 | destroy_event_expr); | |
4624dad0 SM |
564 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); |
565 | if (!state) { | |
566 | ERR("Failed to allocate an argpar state."); | |
567 | goto error; | |
568 | } | |
569 | ||
570 | while (true) { | |
571 | enum argpar_state_parse_next_status status; | |
572 | ||
573 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
574 | status = argpar_state_parse_next(state, &item, &error); | |
575 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
576 | ERR("%s", error); | |
577 | goto error; | |
578 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
579 | /* Just stop parsing here. */ | |
580 | break; | |
581 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
582 | break; | |
583 | } | |
584 | ||
585 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
586 | ||
587 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
588 | const struct argpar_item_opt *item_opt = | |
589 | (const struct argpar_item_opt *) item; | |
590 | ||
591 | switch (item_opt->descr->id) { | |
592 | /* Domains. */ | |
593 | case OPT_USERSPACE: | |
594 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_UST)) { | |
595 | goto error; | |
596 | } | |
597 | ||
598 | break; | |
599 | case OPT_KERNEL: | |
600 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_KERNEL)) { | |
601 | goto error; | |
602 | } | |
603 | ||
604 | break; | |
605 | case OPT_LOG4J: | |
606 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_LOG4J)) { | |
607 | goto error; | |
608 | } | |
609 | ||
610 | break; | |
611 | case OPT_JUL: | |
612 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_JUL)) { | |
613 | goto error; | |
614 | } | |
615 | ||
616 | break; | |
617 | case OPT_PYTHON: | |
618 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_PYTHON)) { | |
619 | goto error; | |
620 | } | |
621 | ||
622 | break; | |
623 | ||
624 | /* Event rule types */ | |
625 | case OPT_FUNCTION: | |
626 | if (!assign_event_rule_type(&event_rule_type, | |
627 | LTTNG_EVENT_RULE_TYPE_KRETPROBE)) { | |
628 | goto error; | |
629 | } | |
630 | ||
631 | break; | |
632 | case OPT_PROBE: | |
633 | if (!assign_event_rule_type(&event_rule_type, | |
634 | LTTNG_EVENT_RULE_TYPE_KPROBE)) { | |
635 | goto error; | |
636 | } | |
637 | ||
638 | if (!assign_string(&source, item_opt->arg, "source")) { | |
639 | goto error; | |
640 | } | |
641 | ||
642 | break; | |
643 | case OPT_USERSPACE_PROBE: | |
644 | if (!assign_event_rule_type(&event_rule_type, | |
645 | LTTNG_EVENT_RULE_TYPE_UPROBE)) { | |
646 | goto error; | |
647 | } | |
648 | ||
649 | if (!assign_string(&source, item_opt->arg, "source")) { | |
650 | goto error; | |
651 | } | |
652 | ||
653 | break; | |
654 | case OPT_SYSCALL: | |
655 | if (!assign_event_rule_type(&event_rule_type, | |
656 | LTTNG_EVENT_RULE_TYPE_SYSCALL)) { | |
657 | goto error; | |
658 | } | |
659 | ||
660 | break; | |
661 | case OPT_TRACEPOINT: | |
662 | if (!assign_event_rule_type(&event_rule_type, | |
663 | LTTNG_EVENT_RULE_TYPE_TRACEPOINT)) { | |
664 | goto error; | |
665 | } | |
666 | ||
667 | break; | |
668 | case OPT_ALL: | |
669 | all_events = true; | |
670 | break; | |
671 | case OPT_FILTER: | |
672 | if (!assign_string(&filter, item_opt->arg, | |
673 | "--filter/-f")) { | |
674 | goto error; | |
675 | } | |
676 | ||
677 | break; | |
678 | case OPT_EXCLUDE: | |
679 | if (!assign_string(&exclude, item_opt->arg, | |
680 | "--exclude/-x")) { | |
681 | goto error; | |
682 | } | |
683 | ||
684 | break; | |
685 | case OPT_LOGLEVEL: | |
686 | case OPT_LOGLEVEL_ONLY: | |
687 | if (!assign_string(&loglevel_str, item_opt->arg, | |
688 | "--loglevel/--loglevel-only")) { | |
689 | goto error; | |
690 | } | |
691 | ||
692 | loglevel_only = item_opt->descr->id == | |
693 | OPT_LOGLEVEL_ONLY; | |
694 | break; | |
20a01d15 SM |
695 | case OPT_CAPTURE: |
696 | { | |
697 | int ret; | |
698 | const char *capture_str = item_opt->arg; | |
699 | ||
700 | ret = filter_parser_ctx_create_from_filter_expression( | |
701 | capture_str, &parser_ctx); | |
702 | if (ret) { | |
703 | ERR("Failed to parse capture expression `%s`.", | |
704 | capture_str); | |
705 | goto error; | |
706 | } | |
707 | ||
708 | event_expr = ir_op_root_to_event_expr( | |
709 | parser_ctx->ir_root, | |
710 | capture_str); | |
711 | if (!event_expr) { | |
712 | /* | |
713 | * ir_op_root_to_event_expr has printed | |
714 | * an error message. | |
715 | */ | |
716 | goto error; | |
717 | } | |
718 | ||
719 | ret = lttng_dynamic_pointer_array_add_pointer( | |
720 | &res.capture_descriptors, | |
721 | event_expr); | |
722 | if (ret) { | |
723 | goto error; | |
724 | } | |
725 | ||
726 | /* | |
727 | * The ownership of event expression was | |
728 | * transferred to the dynamic array. | |
729 | */ | |
730 | event_expr = NULL; | |
731 | ||
732 | break; | |
733 | } | |
4624dad0 SM |
734 | default: |
735 | abort(); | |
736 | } | |
737 | } else { | |
738 | const struct argpar_item_non_opt *item_non_opt = | |
739 | (const struct argpar_item_non_opt *) | |
740 | item; | |
741 | ||
742 | /* | |
743 | * Don't accept two non-option arguments/tracepoint | |
744 | * names. | |
745 | */ | |
746 | if (tracepoint_name) { | |
747 | ERR("Unexpected argument '%s'", | |
748 | item_non_opt->arg); | |
749 | goto error; | |
750 | } | |
751 | ||
752 | tracepoint_name = item_non_opt->arg; | |
753 | } | |
754 | } | |
755 | ||
756 | if (event_rule_type == LTTNG_EVENT_RULE_TYPE_UNKNOWN) { | |
757 | event_rule_type = LTTNG_EVENT_RULE_TYPE_TRACEPOINT; | |
758 | } | |
759 | ||
760 | /* | |
761 | * Option -a is applicable to event rules of type tracepoint and | |
762 | * syscall, and it is equivalent to using "*" as the tracepoint name. | |
763 | */ | |
764 | if (all_events) { | |
765 | switch (event_rule_type) { | |
766 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
767 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
768 | break; | |
769 | default: | |
770 | ERR("Can't use -a/--all with %s event rules.", | |
771 | lttng_event_rule_type_str(event_rule_type)); | |
772 | goto error; | |
773 | } | |
774 | ||
775 | if (tracepoint_name) { | |
776 | ERR("Can't provide a tracepoint name with -a/--all."); | |
777 | goto error; | |
778 | } | |
779 | ||
780 | /* In which case, it's equivalent to tracepoint name "*". */ | |
781 | tracepoint_name = "*"; | |
782 | } | |
783 | ||
784 | /* | |
785 | * A tracepoint name (or -a, for the event rule types that accept it) | |
786 | * is required. | |
787 | */ | |
788 | if (!tracepoint_name) { | |
789 | ERR("Need to provide either a tracepoint name or -a/--all."); | |
790 | goto error; | |
791 | } | |
792 | ||
793 | /* | |
794 | * We don't support multiple tracepoint names for now. | |
795 | */ | |
796 | if (strchr(tracepoint_name, ',')) { | |
797 | ERR("Comma separated tracepoint names are not supported."); | |
798 | goto error; | |
799 | } | |
800 | ||
801 | /* | |
802 | * Update *argc and *argv so our caller can keep parsing what follows. | |
803 | */ | |
804 | consumed_args = argpar_state_get_ingested_orig_args(state); | |
805 | assert(consumed_args >= 0); | |
806 | *argc -= consumed_args; | |
807 | *argv += consumed_args; | |
808 | ||
809 | /* Need to specify a domain. */ | |
810 | if (domain_type == LTTNG_DOMAIN_NONE) { | |
811 | ERR("Please specify a domain (--kernel/--userspace/--jul/--log4j/--python)."); | |
812 | goto error; | |
813 | } | |
814 | ||
815 | /* Validate event rule type against domain. */ | |
816 | switch (event_rule_type) { | |
817 | case LTTNG_EVENT_RULE_TYPE_KPROBE: | |
818 | case LTTNG_EVENT_RULE_TYPE_KRETPROBE: | |
819 | case LTTNG_EVENT_RULE_TYPE_UPROBE: | |
820 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
821 | if (domain_type != LTTNG_DOMAIN_KERNEL) { | |
822 | ERR("Event type not available for user-space tracing."); | |
823 | goto error; | |
824 | } | |
825 | break; | |
826 | ||
827 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
828 | break; | |
829 | ||
830 | default: | |
831 | abort(); | |
832 | } | |
833 | ||
834 | /* | |
835 | * Adding a filter to a probe, function or userspace-probe would be | |
836 | * denied by the kernel tracer as it's not supported at the moment. We | |
837 | * do an early check here to warn the user. | |
838 | */ | |
839 | if (filter && domain_type == LTTNG_DOMAIN_KERNEL) { | |
840 | switch (event_rule_type) { | |
841 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
842 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
843 | break; | |
844 | default: | |
845 | ERR("Filter expressions are not supported for %s event rules.", | |
846 | lttng_event_rule_type_str(event_rule_type)); | |
847 | goto error; | |
848 | } | |
849 | } | |
850 | ||
851 | /* If --exclude/-x was passed, split it into an exclusion list. */ | |
852 | if (exclude) { | |
853 | if (domain_type != LTTNG_DOMAIN_UST) { | |
854 | ERR("Event name exclusions are not yet implemented for %s event rules.", | |
855 | get_domain_str(domain_type)); | |
856 | goto error; | |
857 | } | |
858 | ||
859 | ||
860 | if (create_exclusion_list_and_validate(tracepoint_name, exclude, | |
861 | &exclusion_list) != 0) { | |
862 | ERR("Failed to create exclusion list."); | |
863 | goto error; | |
864 | } | |
865 | } | |
866 | ||
867 | if (loglevel_str && event_rule_type != LTTNG_EVENT_RULE_TYPE_TRACEPOINT) { | |
868 | ERR("Log levels are only applicable to tracepoint event rules."); | |
869 | goto error; | |
870 | } | |
871 | ||
872 | /* Finally, create the event rule object. */ | |
873 | switch (event_rule_type) { | |
874 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
875 | { | |
876 | enum lttng_event_rule_status event_rule_status; | |
877 | ||
20a01d15 SM |
878 | res.er = lttng_event_rule_tracepoint_create(domain_type); |
879 | if (!res.er) { | |
4624dad0 SM |
880 | ERR("Failed to create tracepoint event rule."); |
881 | goto error; | |
882 | } | |
883 | ||
884 | /* Set pattern. */ | |
885 | event_rule_status = lttng_event_rule_tracepoint_set_pattern( | |
20a01d15 | 886 | res.er, tracepoint_name); |
4624dad0 SM |
887 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
888 | ERR("Failed to set tracepoint event rule's pattern to '%s'.", | |
889 | tracepoint_name); | |
890 | goto error; | |
891 | } | |
892 | ||
893 | /* Set filter. */ | |
894 | if (filter) { | |
895 | event_rule_status = lttng_event_rule_tracepoint_set_filter( | |
20a01d15 | 896 | res.er, filter); |
4624dad0 SM |
897 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
898 | ERR("Failed to set tracepoint event rule's filter to '%s'.", | |
899 | filter); | |
900 | goto error; | |
901 | } | |
902 | } | |
903 | ||
904 | /* Set exclusion list. */ | |
905 | if (exclusion_list) { | |
906 | int n; | |
907 | ||
908 | for (n = 0; exclusion_list[n]; n++) { | |
909 | event_rule_status = lttng_event_rule_tracepoint_add_exclusion( | |
20a01d15 | 910 | res.er, |
4624dad0 SM |
911 | exclusion_list[n]); |
912 | if (event_rule_status != | |
913 | LTTNG_EVENT_RULE_STATUS_OK) { | |
914 | ERR("Failed to set tracepoint exclusion list element '%s'", | |
915 | exclusion_list[n]); | |
916 | goto error; | |
917 | } | |
918 | } | |
919 | } | |
920 | ||
921 | if (loglevel_str) { | |
922 | int loglevel; | |
923 | ||
924 | if (domain_type == LTTNG_DOMAIN_KERNEL) { | |
925 | ERR("Log levels are not supported by the kernel tracer."); | |
926 | goto error; | |
927 | } | |
928 | ||
929 | loglevel = parse_loglevel_string( | |
930 | loglevel_str, domain_type); | |
931 | if (loglevel < 0) { | |
932 | ERR("Failed to parse `%s` as a log level.", | |
933 | loglevel_str); | |
934 | goto error; | |
935 | } | |
936 | ||
937 | if (loglevel_only) { | |
938 | event_rule_status = lttng_event_rule_tracepoint_set_log_level( | |
20a01d15 SM |
939 | res.er, |
940 | loglevel); | |
4624dad0 SM |
941 | } else { |
942 | event_rule_status = lttng_event_rule_tracepoint_set_log_level_range_lower_bound( | |
20a01d15 SM |
943 | res.er, |
944 | loglevel); | |
4624dad0 SM |
945 | } |
946 | ||
947 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
948 | ERR("Failed to set log level on event fule."); | |
949 | goto error; | |
950 | } | |
951 | } | |
952 | ||
953 | break; | |
954 | } | |
955 | case LTTNG_EVENT_RULE_TYPE_KPROBE: | |
956 | { | |
957 | int ret; | |
958 | enum lttng_event_rule_status event_rule_status; | |
959 | ||
20a01d15 SM |
960 | res.er = lttng_event_rule_kprobe_create(); |
961 | if (!res.er) { | |
4624dad0 SM |
962 | ERR("Failed to create kprobe event rule."); |
963 | goto error; | |
964 | } | |
965 | ||
966 | ret = parse_kernel_probe_opts(source, &kernel_probe_location); | |
967 | if (ret) { | |
968 | ERR("Failed to parse kernel probe location."); | |
969 | goto error; | |
970 | } | |
971 | ||
20a01d15 | 972 | event_rule_status = lttng_event_rule_kprobe_set_name(res.er, tracepoint_name); |
4624dad0 SM |
973 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
974 | ERR("Failed to set kprobe event rule's name to '%s'.", tracepoint_name); | |
975 | goto error; | |
976 | } | |
977 | ||
978 | assert(kernel_probe_location); | |
20a01d15 | 979 | event_rule_status = lttng_event_rule_kprobe_set_location(res.er, kernel_probe_location); |
4624dad0 SM |
980 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
981 | ERR("Failed to set kprobe event rule's location."); | |
982 | goto error; | |
983 | } | |
984 | ||
985 | break; | |
986 | } | |
987 | case LTTNG_EVENT_RULE_TYPE_UPROBE: | |
988 | { | |
989 | int ret; | |
990 | enum lttng_event_rule_status event_rule_status; | |
991 | ||
992 | ret = parse_userspace_probe_opts( | |
993 | source, &userspace_probe_location); | |
994 | if (ret) { | |
995 | ERR("Failed to parse user space probe location."); | |
996 | goto error; | |
997 | } | |
998 | ||
20a01d15 SM |
999 | res.er = lttng_event_rule_uprobe_create(); |
1000 | if (!res.er) { | |
1001 | ERR("Failed to create userspace probe event rule."); | |
4624dad0 SM |
1002 | goto error; |
1003 | } | |
1004 | ||
1005 | event_rule_status = lttng_event_rule_uprobe_set_location( | |
20a01d15 | 1006 | res.er, userspace_probe_location); |
4624dad0 SM |
1007 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1008 | ERR("Failed to set user space probe event rule's location."); | |
1009 | goto error; | |
1010 | } | |
1011 | ||
1012 | event_rule_status = lttng_event_rule_uprobe_set_name( | |
20a01d15 | 1013 | res.er, tracepoint_name); |
4624dad0 SM |
1014 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1015 | ERR("Failed to set user space probe event rule's name to '%s'.", | |
1016 | tracepoint_name); | |
1017 | goto error; | |
1018 | } | |
1019 | ||
1020 | break; | |
1021 | } | |
1022 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
1023 | { | |
1024 | enum lttng_event_rule_status event_rule_status; | |
1025 | ||
20a01d15 SM |
1026 | res.er = lttng_event_rule_syscall_create(); |
1027 | if (!res.er) { | |
4624dad0 SM |
1028 | ERR("Failed to create syscall event rule."); |
1029 | goto error; | |
1030 | } | |
1031 | ||
1032 | event_rule_status = lttng_event_rule_syscall_set_pattern( | |
20a01d15 | 1033 | res.er, tracepoint_name); |
4624dad0 SM |
1034 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1035 | ERR("Failed to set syscall event rule's pattern to '%s'.", | |
1036 | tracepoint_name); | |
1037 | goto error; | |
1038 | } | |
1039 | ||
1040 | if (filter) { | |
1041 | event_rule_status = lttng_event_rule_syscall_set_filter( | |
20a01d15 | 1042 | res.er, filter); |
4624dad0 SM |
1043 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1044 | ERR("Failed to set syscall event rule's filter to '%s'.", | |
1045 | filter); | |
1046 | goto error; | |
1047 | } | |
1048 | } | |
1049 | ||
1050 | break; | |
1051 | } | |
1052 | default: | |
1053 | abort(); | |
1054 | goto error; | |
1055 | } | |
1056 | ||
1057 | goto end; | |
1058 | ||
1059 | error: | |
20a01d15 SM |
1060 | lttng_event_rule_destroy(res.er); |
1061 | res.er = NULL; | |
1062 | lttng_dynamic_pointer_array_reset(&res.capture_descriptors); | |
4624dad0 SM |
1063 | |
1064 | end: | |
20a01d15 SM |
1065 | if (parser_ctx) { |
1066 | filter_parser_ctx_free(parser_ctx); | |
1067 | } | |
1068 | ||
1069 | lttng_event_expr_destroy(event_expr); | |
4624dad0 SM |
1070 | argpar_item_destroy(item); |
1071 | free(error); | |
1072 | argpar_state_destroy(state); | |
1073 | free(filter); | |
1074 | free(exclude); | |
1075 | free(loglevel_str); | |
6e61d0fa | 1076 | free(source); |
4624dad0 SM |
1077 | strutils_free_null_terminated_array_of_strings(exclusion_list); |
1078 | lttng_kernel_probe_location_destroy(kernel_probe_location); | |
1079 | lttng_userspace_probe_location_destroy(userspace_probe_location); | |
20a01d15 | 1080 | return res; |
4624dad0 SM |
1081 | } |
1082 | ||
1083 | static | |
1084 | struct lttng_condition *handle_condition_event(int *argc, const char ***argv) | |
1085 | { | |
20a01d15 | 1086 | struct parse_event_rule_res res; |
4624dad0 | 1087 | struct lttng_condition *c; |
20a01d15 | 1088 | size_t i; |
4624dad0 | 1089 | |
20a01d15 SM |
1090 | res = parse_event_rule(argc, argv); |
1091 | if (!res.er) { | |
4624dad0 | 1092 | c = NULL; |
20a01d15 | 1093 | goto error; |
4624dad0 SM |
1094 | } |
1095 | ||
20a01d15 SM |
1096 | c = lttng_condition_event_rule_create(res.er); |
1097 | lttng_event_rule_destroy(res.er); | |
1098 | res.er = NULL; | |
4624dad0 | 1099 | if (!c) { |
20a01d15 SM |
1100 | goto error; |
1101 | } | |
1102 | ||
1103 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&res.capture_descriptors); | |
1104 | i++) { | |
1105 | enum lttng_condition_status status; | |
1106 | struct lttng_event_expr **expr = | |
1107 | lttng_dynamic_array_get_element( | |
1108 | &res.capture_descriptors.array, i); | |
1109 | ||
1110 | assert(expr); | |
1111 | assert(*expr); | |
1112 | status = lttng_condition_event_rule_append_capture_descriptor( | |
1113 | c, *expr); | |
1114 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
1115 | goto error; | |
1116 | } | |
1117 | ||
1118 | /* Ownership of event expression moved to `c` */ | |
1119 | *expr = NULL; | |
4624dad0 SM |
1120 | } |
1121 | ||
20a01d15 SM |
1122 | goto end; |
1123 | ||
1124 | error: | |
1125 | lttng_condition_destroy(c); | |
1126 | c = NULL; | |
1127 | ||
4624dad0 | 1128 | end: |
20a01d15 SM |
1129 | lttng_dynamic_pointer_array_reset(&res.capture_descriptors); |
1130 | lttng_event_rule_destroy(res.er); | |
4624dad0 SM |
1131 | return c; |
1132 | } | |
1133 | ||
1134 | static | |
1135 | struct lttng_condition *handle_condition_session_consumed_size(int *argc, const char ***argv) | |
1136 | { | |
1137 | struct lttng_condition *cond = NULL; | |
1138 | struct argpar_state *state = NULL; | |
1139 | struct argpar_item *item = NULL; | |
1140 | const char *threshold_arg = NULL; | |
1141 | const char *session_name_arg = NULL; | |
1142 | uint64_t threshold; | |
1143 | char *error = NULL; | |
1144 | enum lttng_condition_status condition_status; | |
1145 | ||
1146 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); | |
1147 | if (!state) { | |
1148 | ERR("Failed to allocate an argpar state."); | |
1149 | goto error; | |
1150 | } | |
1151 | ||
1152 | while (true) { | |
1153 | enum argpar_state_parse_next_status status; | |
1154 | ||
1155 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
1156 | status = argpar_state_parse_next(state, &item, &error); | |
1157 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1158 | ERR("%s", error); | |
1159 | goto error; | |
1160 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
1161 | /* Just stop parsing here. */ | |
1162 | break; | |
1163 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1164 | break; | |
1165 | } | |
1166 | ||
1167 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
1168 | ||
1169 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
1170 | const struct argpar_item_opt *item_opt = | |
1171 | (const struct argpar_item_opt *) item; | |
1172 | ||
1173 | switch (item_opt->descr->id) { | |
1174 | default: | |
1175 | abort(); | |
1176 | } | |
1177 | } else { | |
1178 | const struct argpar_item_non_opt *item_non_opt; | |
1179 | ||
1180 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); | |
1181 | ||
1182 | item_non_opt = (const struct argpar_item_non_opt *) item; | |
1183 | ||
1184 | switch (item_non_opt->non_opt_index) { | |
1185 | case 0: | |
1186 | session_name_arg = item_non_opt->arg; | |
1187 | break; | |
1188 | case 1: | |
1189 | threshold_arg = item_non_opt->arg; | |
1190 | break; | |
1191 | default: | |
1192 | ERR("Unexpected argument `%s`.", | |
1193 | item_non_opt->arg); | |
1194 | goto error; | |
1195 | } | |
1196 | } | |
1197 | } | |
1198 | ||
1199 | *argc -= argpar_state_get_ingested_orig_args(state); | |
1200 | *argv += argpar_state_get_ingested_orig_args(state); | |
1201 | ||
1202 | if (!session_name_arg) { | |
1203 | ERR("Missing session name argument."); | |
1204 | goto error; | |
1205 | } | |
1206 | ||
1207 | if (!threshold_arg) { | |
1208 | ERR("Missing threshold argument."); | |
1209 | goto error; | |
1210 | } | |
1211 | ||
1212 | if (utils_parse_size_suffix(threshold_arg, &threshold) != 0) { | |
1213 | ERR("Failed to parse `%s` as a size.", threshold_arg); | |
1214 | goto error; | |
1215 | } | |
1216 | ||
1217 | cond = lttng_condition_session_consumed_size_create(); | |
1218 | if (!cond) { | |
1219 | ERR("Failed to allocate a session consumed size condition."); | |
1220 | goto error; | |
1221 | } | |
1222 | ||
1223 | condition_status = lttng_condition_session_consumed_size_set_session_name( | |
1224 | cond, session_name_arg); | |
1225 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { | |
1226 | ERR("Failed to set session consumed size condition's session name to '%s'.", | |
1227 | session_name_arg); | |
1228 | goto error; | |
1229 | } | |
1230 | ||
1231 | condition_status = lttng_condition_session_consumed_size_set_threshold( | |
1232 | cond, threshold); | |
1233 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { | |
1234 | ERR("Failed to set session consumed size condition threshold."); | |
1235 | goto error; | |
1236 | } | |
1237 | ||
1238 | goto end; | |
1239 | ||
1240 | error: | |
1241 | lttng_condition_destroy(cond); | |
1242 | cond = NULL; | |
1243 | ||
1244 | end: | |
1245 | argpar_state_destroy(state); | |
1246 | argpar_item_destroy(item); | |
1247 | free(error); | |
1248 | return cond; | |
1249 | } | |
1250 | ||
1251 | static | |
1252 | struct lttng_condition *handle_condition_buffer_usage_high(int *argc, const char ***argv) | |
1253 | { | |
1254 | ERR("High buffer usage threshold conditions are unsupported for the moment."); | |
1255 | return NULL; | |
1256 | } | |
1257 | ||
1258 | static | |
1259 | struct lttng_condition *handle_condition_buffer_usage_low(int *argc, const char ***argv) | |
1260 | { | |
1261 | ERR("Low buffer usage threshold conditions are unsupported for the moment."); | |
1262 | return NULL; | |
1263 | } | |
1264 | ||
1265 | static | |
1266 | struct lttng_condition *handle_condition_session_rotation_ongoing(int *argc, const char ***argv) | |
1267 | { | |
1268 | ERR("Session rotation ongoing conditions are unsupported for the moment."); | |
1269 | return NULL; | |
1270 | } | |
1271 | ||
1272 | static | |
1273 | struct lttng_condition *handle_condition_session_rotation_completed(int *argc, const char ***argv) | |
1274 | { | |
1275 | ERR("Session rotation completed conditions are unsupported for the moment."); | |
1276 | return NULL; | |
1277 | } | |
1278 | ||
1279 | struct condition_descr { | |
1280 | const char *name; | |
1281 | struct lttng_condition *(*handler) (int *argc, const char ***argv); | |
1282 | }; | |
1283 | ||
1284 | static const | |
1285 | struct condition_descr condition_descrs[] = { | |
1286 | { "on-event", handle_condition_event }, | |
1287 | { "on-session-consumed-size", handle_condition_session_consumed_size }, | |
1288 | { "on-buffer-usage-high", handle_condition_buffer_usage_high }, | |
1289 | { "on-buffer-usage-low", handle_condition_buffer_usage_low }, | |
1290 | { "on-session-rotation-ongoing", handle_condition_session_rotation_ongoing }, | |
1291 | { "on-session-rotation-completed", handle_condition_session_rotation_completed }, | |
1292 | }; | |
1293 | ||
1294 | static | |
1295 | struct lttng_condition *parse_condition(int *argc, const char ***argv) | |
1296 | { | |
1297 | int i; | |
1298 | struct lttng_condition *cond; | |
1299 | const char *condition_name; | |
1300 | const struct condition_descr *descr = NULL; | |
1301 | ||
1302 | if (*argc == 0) { | |
1303 | ERR("Missing condition name."); | |
1304 | goto error; | |
1305 | } | |
1306 | ||
1307 | condition_name = (*argv)[0]; | |
1308 | ||
1309 | (*argc)--; | |
1310 | (*argv)++; | |
1311 | ||
1312 | for (i = 0; i < ARRAY_SIZE(condition_descrs); i++) { | |
1313 | if (strcmp(condition_name, condition_descrs[i].name) == 0) { | |
1314 | descr = &condition_descrs[i]; | |
1315 | break; | |
1316 | } | |
1317 | } | |
1318 | ||
1319 | if (!descr) { | |
1320 | ERR("Unknown condition name '%s'", condition_name); | |
1321 | goto error; | |
1322 | } | |
1323 | ||
1324 | cond = descr->handler(argc, argv); | |
1325 | if (!cond) { | |
1326 | /* The handler has already printed an error message. */ | |
1327 | goto error; | |
1328 | } | |
1329 | ||
1330 | goto end; | |
1331 | error: | |
1332 | cond = NULL; | |
1333 | end: | |
1334 | return cond; | |
1335 | } | |
1336 | ||
1337 | ||
1338 | static | |
1339 | struct lttng_action *handle_action_notify(int *argc, const char ***argv) | |
1340 | { | |
1341 | return lttng_action_notify_create(); | |
1342 | } | |
1343 | ||
1344 | static const struct argpar_opt_descr no_opt_descrs[] = { | |
1345 | ARGPAR_OPT_DESCR_SENTINEL | |
1346 | }; | |
1347 | ||
1348 | /* | |
1349 | * Generic handler for a kind of action that takes a session name as its sole | |
1350 | * argument. | |
1351 | */ | |
1352 | ||
1353 | static | |
1354 | struct lttng_action *handle_action_simple_session( | |
1355 | int *argc, const char ***argv, | |
1356 | struct lttng_action *(*create_action_cb)(void), | |
1357 | enum lttng_action_status (*set_session_name_cb)(struct lttng_action *, const char *), | |
1358 | const char *action_name) | |
1359 | { | |
1360 | struct lttng_action *action = NULL; | |
1361 | struct argpar_state *state = NULL; | |
1362 | struct argpar_item *item = NULL; | |
1363 | const char *session_name_arg = NULL; | |
1364 | char *error = NULL; | |
1365 | enum lttng_action_status action_status; | |
1366 | ||
1367 | state = argpar_state_create(*argc, *argv, no_opt_descrs); | |
1368 | if (!state) { | |
1369 | ERR("Failed to allocate an argpar state."); | |
1370 | goto error; | |
1371 | } | |
1372 | ||
1373 | while (true) { | |
1374 | enum argpar_state_parse_next_status status; | |
1375 | const struct argpar_item_non_opt *item_non_opt; | |
1376 | ||
1377 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
1378 | status = argpar_state_parse_next(state, &item, &error); | |
1379 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1380 | ERR("%s", error); | |
1381 | goto error; | |
1382 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
1383 | /* Just stop parsing here. */ | |
1384 | break; | |
1385 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1386 | break; | |
1387 | } | |
1388 | ||
1389 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
1390 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); | |
1391 | ||
1392 | item_non_opt = (const struct argpar_item_non_opt *) item; | |
1393 | ||
1394 | switch (item_non_opt->non_opt_index) { | |
1395 | case 0: | |
1396 | session_name_arg = item_non_opt->arg; | |
1397 | break; | |
1398 | default: | |
1399 | ERR("Unexpected argument `%s`.", item_non_opt->arg); | |
1400 | goto error; | |
1401 | } | |
1402 | } | |
1403 | ||
1404 | *argc -= argpar_state_get_ingested_orig_args(state); | |
1405 | *argv += argpar_state_get_ingested_orig_args(state); | |
1406 | ||
1407 | if (!session_name_arg) { | |
1408 | ERR("Missing session name."); | |
1409 | goto error; | |
1410 | } | |
1411 | ||
1412 | action = create_action_cb(); | |
1413 | if (!action) { | |
1414 | ERR("Failed to allocate %s session action.", action_name); | |
1415 | goto error; | |
1416 | } | |
1417 | ||
1418 | action_status = set_session_name_cb(action, session_name_arg); | |
1419 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
1420 | ERR("Failed to set action %s session's session name to '%s'.", | |
1421 | action_name, session_name_arg); | |
1422 | goto error; | |
1423 | } | |
1424 | ||
1425 | goto end; | |
1426 | ||
1427 | error: | |
1428 | lttng_action_destroy(action); | |
1429 | action = NULL; | |
97abbc84 | 1430 | argpar_item_destroy(item); |
4624dad0 | 1431 | end: |
cb1b81ea | 1432 | free(error); |
b78ef509 | 1433 | argpar_state_destroy(state); |
4624dad0 SM |
1434 | return action; |
1435 | } | |
1436 | ||
1437 | static | |
1438 | struct lttng_action *handle_action_start_session(int *argc, | |
1439 | const char ***argv) | |
1440 | { | |
1441 | return handle_action_simple_session(argc, argv, | |
1442 | lttng_action_start_session_create, | |
1443 | lttng_action_start_session_set_session_name, | |
1444 | "start"); | |
1445 | } | |
1446 | ||
1447 | static | |
1448 | struct lttng_action *handle_action_stop_session(int *argc, | |
1449 | const char ***argv) | |
1450 | { | |
1451 | return handle_action_simple_session(argc, argv, | |
1452 | lttng_action_stop_session_create, | |
1453 | lttng_action_stop_session_set_session_name, | |
1454 | "stop"); | |
1455 | } | |
1456 | ||
1457 | static | |
1458 | struct lttng_action *handle_action_rotate_session(int *argc, | |
1459 | const char ***argv) | |
1460 | { | |
1461 | return handle_action_simple_session(argc, argv, | |
1462 | lttng_action_rotate_session_create, | |
1463 | lttng_action_rotate_session_set_session_name, | |
1464 | "rotate"); | |
1465 | } | |
1466 | ||
1467 | static const struct argpar_opt_descr snapshot_action_opt_descrs[] = { | |
1468 | { OPT_NAME, 'n', "name", true }, | |
1469 | { OPT_MAX_SIZE, 'm', "max-size", true }, | |
1470 | { OPT_CTRL_URL, '\0', "ctrl-url", true }, | |
1471 | { OPT_DATA_URL, '\0', "data-url", true }, | |
1472 | { OPT_URL, '\0', "url", true }, | |
1473 | { OPT_PATH, '\0', "path", true }, | |
1474 | ARGPAR_OPT_DESCR_SENTINEL | |
1475 | }; | |
1476 | ||
1477 | static | |
1478 | struct lttng_action *handle_action_snapshot_session(int *argc, | |
1479 | const char ***argv) | |
1480 | { | |
1481 | struct lttng_action *action = NULL; | |
1482 | struct argpar_state *state = NULL; | |
1483 | struct argpar_item *item = NULL; | |
1484 | const char *session_name_arg = NULL; | |
1485 | char *snapshot_name_arg = NULL; | |
1486 | char *ctrl_url_arg = NULL; | |
1487 | char *data_url_arg = NULL; | |
1488 | char *max_size_arg = NULL; | |
1489 | char *url_arg = NULL; | |
1490 | char *path_arg = NULL; | |
1491 | char *error = NULL; | |
1492 | enum lttng_action_status action_status; | |
1493 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1494 | int ret; | |
1495 | unsigned int locations_specified = 0; | |
1496 | ||
1497 | state = argpar_state_create(*argc, *argv, snapshot_action_opt_descrs); | |
1498 | if (!state) { | |
1499 | ERR("Failed to allocate an argpar state."); | |
1500 | goto error; | |
1501 | } | |
1502 | ||
1503 | while (true) { | |
1504 | enum argpar_state_parse_next_status status; | |
1505 | ||
1506 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
1507 | status = argpar_state_parse_next(state, &item, &error); | |
1508 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1509 | ERR("%s", error); | |
1510 | goto error; | |
1511 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
1512 | /* Just stop parsing here. */ | |
1513 | break; | |
1514 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1515 | break; | |
1516 | } | |
1517 | ||
1518 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
1519 | ||
1520 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
1521 | const struct argpar_item_opt *item_opt = | |
1522 | (const struct argpar_item_opt *) item; | |
1523 | ||
1524 | switch (item_opt->descr->id) { | |
1525 | case OPT_NAME: | |
1526 | if (!assign_string(&snapshot_name_arg, item_opt->arg, "--name/-n")) { | |
1527 | goto error; | |
1528 | } | |
1529 | ||
1530 | break; | |
1531 | case OPT_MAX_SIZE: | |
1532 | if (!assign_string(&max_size_arg, item_opt->arg, "--max-size/-m")) { | |
1533 | goto error; | |
1534 | } | |
1535 | ||
1536 | break; | |
1537 | case OPT_CTRL_URL: | |
1538 | if (!assign_string(&ctrl_url_arg, item_opt->arg, "--ctrl-url")) { | |
1539 | goto error; | |
1540 | } | |
1541 | ||
1542 | break; | |
1543 | case OPT_DATA_URL: | |
1544 | if (!assign_string(&data_url_arg, item_opt->arg, "--data-url")) { | |
1545 | goto error; | |
1546 | } | |
1547 | ||
1548 | break; | |
1549 | case OPT_URL: | |
1550 | if (!assign_string(&url_arg, item_opt->arg, "--url")) { | |
1551 | goto error; | |
1552 | } | |
1553 | ||
1554 | break; | |
1555 | case OPT_PATH: | |
1556 | if (!assign_string(&path_arg, item_opt->arg, "--path")) { | |
1557 | goto error; | |
1558 | } | |
1559 | ||
1560 | break; | |
1561 | default: | |
1562 | abort(); | |
1563 | } | |
1564 | } else { | |
1565 | const struct argpar_item_non_opt *item_non_opt; | |
1566 | ||
1567 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); | |
1568 | ||
1569 | item_non_opt = (const struct argpar_item_non_opt *) item; | |
1570 | ||
1571 | switch (item_non_opt->non_opt_index) { | |
1572 | case 0: | |
1573 | session_name_arg = item_non_opt->arg; | |
1574 | break; | |
1575 | default: | |
1576 | ERR("Unexpected argument `%s`.", | |
1577 | item_non_opt->arg); | |
1578 | goto error; | |
1579 | } | |
1580 | } | |
1581 | } | |
1582 | ||
1583 | *argc -= argpar_state_get_ingested_orig_args(state); | |
1584 | *argv += argpar_state_get_ingested_orig_args(state); | |
1585 | ||
1586 | if (!session_name_arg) { | |
1587 | ERR("Missing session name."); | |
1588 | goto error; | |
1589 | } | |
1590 | ||
1591 | /* --ctrl-url and --data-url must come in pair. */ | |
1592 | if (ctrl_url_arg && !data_url_arg) { | |
1593 | ERR("--ctrl-url is specified, but --data-url is missing."); | |
1594 | goto error; | |
1595 | } | |
1596 | ||
1597 | if (!ctrl_url_arg && data_url_arg) { | |
1598 | ERR("--data-url is specified, but --ctrl-url is missing."); | |
1599 | goto error; | |
1600 | } | |
1601 | ||
1602 | locations_specified += !!(ctrl_url_arg || data_url_arg); | |
1603 | locations_specified += !!url_arg; | |
1604 | locations_specified += !!path_arg; | |
1605 | ||
1606 | /* --ctrl-url/--data-url, --url and --path are mutually exclusive. */ | |
1607 | if (locations_specified > 1) { | |
1608 | ERR("The --ctrl-url/--data-url, --url, and --path options can't be used together."); | |
1609 | goto error; | |
1610 | } | |
1611 | ||
1612 | /* | |
1613 | * Did the user specify an option that implies using a | |
1614 | * custom/unregistered output? | |
1615 | */ | |
1616 | if (url_arg || ctrl_url_arg || path_arg) { | |
1617 | snapshot_output = lttng_snapshot_output_create(); | |
1618 | if (!snapshot_output) { | |
1619 | ERR("Failed to allocate a snapshot output."); | |
1620 | goto error; | |
1621 | } | |
1622 | } | |
1623 | ||
1624 | action = lttng_action_snapshot_session_create(); | |
1625 | if (!action) { | |
1626 | ERR("Failed to allocate snapshot session action."); | |
1627 | goto error; | |
1628 | } | |
1629 | ||
1630 | action_status = lttng_action_snapshot_session_set_session_name( | |
1631 | action, session_name_arg); | |
1632 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
1633 | ERR("Failed to set action snapshot session's session name to '%s'.", | |
1634 | session_name_arg); | |
1635 | goto error; | |
1636 | } | |
1637 | ||
1638 | if (snapshot_name_arg) { | |
1639 | if (!snapshot_output) { | |
1640 | ERR("Can't provide a snapshot output name without a snapshot output destination."); | |
1641 | goto error; | |
1642 | } | |
1643 | ||
1644 | ret = lttng_snapshot_output_set_name( | |
1645 | snapshot_name_arg, snapshot_output); | |
1646 | if (ret != 0) { | |
1647 | ERR("Failed to set name of snapshot output."); | |
1648 | goto error; | |
1649 | } | |
1650 | } | |
1651 | ||
1652 | if (max_size_arg) { | |
1653 | uint64_t max_size; | |
1654 | ||
1655 | if (!snapshot_output) { | |
1656 | ERR("Can't provide a snapshot output max size without a snapshot output destination."); | |
1657 | goto error; | |
1658 | } | |
1659 | ||
1660 | ret = utils_parse_size_suffix(max_size_arg, &max_size); | |
1661 | if (ret != 0) { | |
1662 | ERR("Failed to parse `%s` as a size.", max_size_arg); | |
1663 | goto error; | |
1664 | } | |
1665 | ||
1666 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1667 | if (ret != 0) { | |
1668 | ERR("Failed to set snapshot output's max size to %" PRIu64 " bytes.", | |
1669 | max_size); | |
1670 | goto error; | |
1671 | } | |
1672 | } | |
1673 | ||
1674 | if (url_arg) { | |
1675 | int num_uris; | |
1676 | struct lttng_uri *uris; | |
1677 | ||
1678 | if (!strstr(url_arg, "://")) { | |
1679 | ERR("Failed to parse '%s' as an URL.", url_arg); | |
1680 | goto error; | |
1681 | } | |
1682 | ||
1683 | num_uris = uri_parse_str_urls(url_arg, NULL, &uris); | |
1684 | if (num_uris < 1) { | |
1685 | ERR("Failed to parse '%s' as an URL.", url_arg); | |
1686 | goto error; | |
1687 | } | |
1688 | ||
1689 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
1690 | ret = lttng_snapshot_output_set_local_path( | |
1691 | uris[0].dst.path, snapshot_output); | |
1692 | free(uris); | |
1693 | if (ret != 0) { | |
1694 | ERR("Failed to assign '%s' as a local destination.", | |
1695 | url_arg); | |
1696 | goto error; | |
1697 | } | |
1698 | } else { | |
1699 | ret = lttng_snapshot_output_set_network_url( | |
1700 | url_arg, snapshot_output); | |
1701 | free(uris); | |
1702 | if (ret != 0) { | |
1703 | ERR("Failed to assign '%s' as a network URL.", | |
1704 | url_arg); | |
1705 | goto error; | |
1706 | } | |
1707 | } | |
1708 | } | |
1709 | ||
1710 | if (path_arg) { | |
1711 | ret = lttng_snapshot_output_set_local_path( | |
1712 | path_arg, snapshot_output); | |
1713 | if (ret != 0) { | |
1714 | ERR("Failed to parse '%s' as a local path.", path_arg); | |
1715 | goto error; | |
1716 | } | |
1717 | } | |
1718 | ||
1719 | if (ctrl_url_arg) { | |
1720 | /* | |
1721 | * Two argument form, network output with separate control and | |
1722 | * data URLs. | |
1723 | */ | |
1724 | ret = lttng_snapshot_output_set_network_urls( | |
1725 | ctrl_url_arg, data_url_arg, snapshot_output); | |
1726 | if (ret != 0) { | |
1727 | ERR("Failed to parse `%s` and `%s` as control and data URLs.", | |
1728 | ctrl_url_arg, data_url_arg); | |
1729 | goto error; | |
1730 | } | |
1731 | } | |
1732 | ||
1733 | if (snapshot_output) { | |
1734 | action_status = lttng_action_snapshot_session_set_output( | |
1735 | action, snapshot_output); | |
1736 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
1737 | ERR("Failed to set snapshot session action's output."); | |
1738 | goto error; | |
1739 | } | |
1740 | ||
1741 | /* Ownership of `snapshot_output` has been transferred to the action. */ | |
1742 | snapshot_output = NULL; | |
1743 | } | |
1744 | ||
1745 | goto end; | |
1746 | ||
1747 | error: | |
1748 | lttng_action_destroy(action); | |
1749 | action = NULL; | |
1750 | free(error); | |
1751 | end: | |
1752 | free(snapshot_name_arg); | |
1753 | free(path_arg); | |
1754 | free(url_arg); | |
1755 | free(ctrl_url_arg); | |
1756 | free(data_url_arg); | |
1757 | free(snapshot_output); | |
f6b73530 | 1758 | free(max_size_arg); |
4624dad0 | 1759 | argpar_state_destroy(state); |
97abbc84 | 1760 | argpar_item_destroy(item); |
4624dad0 SM |
1761 | return action; |
1762 | } | |
1763 | ||
1764 | struct action_descr { | |
1765 | const char *name; | |
1766 | struct lttng_action *(*handler) (int *argc, const char ***argv); | |
1767 | }; | |
1768 | ||
1769 | static const | |
1770 | struct action_descr action_descrs[] = { | |
1771 | { "notify", handle_action_notify }, | |
1772 | { "start-session", handle_action_start_session }, | |
1773 | { "stop-session", handle_action_stop_session }, | |
1774 | { "rotate-session", handle_action_rotate_session }, | |
1775 | { "snapshot-session", handle_action_snapshot_session }, | |
1776 | }; | |
1777 | ||
1778 | static | |
1779 | struct lttng_action *parse_action(int *argc, const char ***argv) | |
1780 | { | |
1781 | int i; | |
1782 | struct lttng_action *action; | |
1783 | const char *action_name; | |
1784 | const struct action_descr *descr = NULL; | |
1785 | ||
1786 | if (*argc == 0) { | |
1787 | ERR("Missing action name."); | |
1788 | goto error; | |
1789 | } | |
1790 | ||
1791 | action_name = (*argv)[0]; | |
1792 | ||
1793 | (*argc)--; | |
1794 | (*argv)++; | |
1795 | ||
1796 | for (i = 0; i < ARRAY_SIZE(action_descrs); i++) { | |
1797 | if (strcmp(action_name, action_descrs[i].name) == 0) { | |
1798 | descr = &action_descrs[i]; | |
1799 | break; | |
1800 | } | |
1801 | } | |
1802 | ||
1803 | if (!descr) { | |
1804 | ERR("Unknown action name: %s", action_name); | |
1805 | goto error; | |
1806 | } | |
1807 | ||
1808 | action = descr->handler(argc, argv); | |
1809 | if (!action) { | |
1810 | /* The handler has already printed an error message. */ | |
1811 | goto error; | |
1812 | } | |
1813 | ||
1814 | goto end; | |
1815 | error: | |
1816 | action = NULL; | |
1817 | end: | |
1818 | return action; | |
1819 | } | |
1820 | ||
1821 | static const | |
1822 | struct argpar_opt_descr add_trigger_options[] = { | |
1823 | { OPT_HELP, 'h', "help", false }, | |
1824 | { OPT_LIST_OPTIONS, '\0', "list-options", false }, | |
1825 | { OPT_CONDITION, '\0', "condition", false }, | |
1826 | { OPT_ACTION, '\0', "action", false }, | |
1827 | { OPT_ID, '\0', "id", true }, | |
1828 | { OPT_FIRE_ONCE_AFTER, '\0', "fire-once-after", true }, | |
1829 | { OPT_FIRE_EVERY, '\0', "fire-every", true }, | |
1830 | { OPT_USER_ID, '\0', "user-id", true }, | |
1831 | ARGPAR_OPT_DESCR_SENTINEL, | |
1832 | }; | |
1833 | ||
1834 | static | |
1835 | void lttng_actions_destructor(void *p) | |
1836 | { | |
1837 | struct lttng_action *action = p; | |
1838 | ||
1839 | lttng_action_destroy(action); | |
1840 | } | |
1841 | ||
1842 | int cmd_add_trigger(int argc, const char **argv) | |
1843 | { | |
1844 | int ret; | |
1845 | int my_argc = argc - 1; | |
1846 | const char **my_argv = argv + 1; | |
1847 | struct lttng_condition *condition = NULL; | |
1848 | struct lttng_dynamic_pointer_array actions; | |
1849 | struct argpar_state *argpar_state = NULL; | |
1850 | struct argpar_item *argpar_item = NULL; | |
1851 | struct lttng_action *action_group = NULL; | |
1852 | struct lttng_action *action = NULL; | |
1853 | struct lttng_trigger *trigger = NULL; | |
1854 | char *error = NULL; | |
1855 | char *id = NULL; | |
1856 | int i; | |
1857 | char *fire_once_after_str = NULL; | |
1858 | char *fire_every_str = NULL; | |
1859 | char *user_id = NULL; | |
1860 | ||
1861 | lttng_dynamic_pointer_array_init(&actions, lttng_actions_destructor); | |
1862 | ||
1863 | while (true) { | |
1864 | enum argpar_state_parse_next_status status; | |
1865 | const struct argpar_item_opt *item_opt; | |
1866 | int ingested_args; | |
1867 | ||
1868 | argpar_state_destroy(argpar_state); | |
1869 | argpar_state = argpar_state_create(my_argc, my_argv, | |
1870 | add_trigger_options); | |
1871 | if (!argpar_state) { | |
1872 | ERR("Failed to create argpar state."); | |
1873 | goto error; | |
1874 | } | |
1875 | ||
1876 | ARGPAR_ITEM_DESTROY_AND_RESET(argpar_item); | |
1877 | status = argpar_state_parse_next(argpar_state, &argpar_item, &error); | |
1878 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1879 | ERR("%s", error); | |
1880 | goto error; | |
1881 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
1882 | ERR("%s", error); | |
1883 | goto error; | |
1884 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1885 | break; | |
1886 | } | |
1887 | ||
1888 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
1889 | ||
1890 | if (argpar_item->type == ARGPAR_ITEM_TYPE_NON_OPT) { | |
1891 | const struct argpar_item_non_opt *item_non_opt = | |
1892 | (const struct argpar_item_non_opt *) | |
1893 | argpar_item; | |
1894 | ||
1895 | ERR("Unexpected argument `%s`.", item_non_opt->arg); | |
1896 | goto error; | |
1897 | } | |
1898 | ||
1899 | item_opt = (const struct argpar_item_opt *) argpar_item; | |
1900 | ||
1901 | ingested_args = argpar_state_get_ingested_orig_args( | |
1902 | argpar_state); | |
1903 | ||
1904 | my_argc -= ingested_args; | |
1905 | my_argv += ingested_args; | |
1906 | ||
1907 | switch (item_opt->descr->id) { | |
1908 | case OPT_HELP: | |
1909 | SHOW_HELP(); | |
1910 | ret = 0; | |
1911 | goto end; | |
1912 | case OPT_LIST_OPTIONS: | |
1913 | list_cmd_options_argpar(stdout, add_trigger_options); | |
1914 | ret = 0; | |
1915 | goto end; | |
1916 | case OPT_CONDITION: | |
1917 | { | |
1918 | if (condition) { | |
1919 | ERR("A --condition was already given."); | |
1920 | goto error; | |
1921 | } | |
1922 | ||
1923 | condition = parse_condition(&my_argc, &my_argv); | |
1924 | if (!condition) { | |
1925 | /* | |
1926 | * An error message was already printed by | |
1927 | * parse_condition. | |
1928 | */ | |
1929 | goto error; | |
1930 | } | |
1931 | ||
1932 | break; | |
1933 | } | |
1934 | case OPT_ACTION: | |
1935 | { | |
1936 | action = parse_action(&my_argc, &my_argv); | |
1937 | if (!action) { | |
1938 | /* | |
1939 | * An error message was already printed by | |
1940 | * parse_condition. | |
1941 | */ | |
1942 | goto error; | |
1943 | } | |
1944 | ||
1945 | ret = lttng_dynamic_pointer_array_add_pointer( | |
1946 | &actions, action); | |
1947 | if (ret) { | |
1948 | ERR("Failed to add pointer to pointer array."); | |
1949 | goto error; | |
1950 | } | |
1951 | ||
1952 | /* Ownership of the action was transferred to the group. */ | |
1953 | action = NULL; | |
1954 | ||
1955 | break; | |
1956 | } | |
1957 | case OPT_ID: | |
1958 | { | |
1959 | if (!assign_string(&id, item_opt->arg, "--id")) { | |
1960 | goto error; | |
1961 | } | |
1962 | ||
1963 | break; | |
1964 | } | |
1965 | case OPT_FIRE_ONCE_AFTER: | |
1966 | { | |
1967 | if (!assign_string(&fire_once_after_str, item_opt->arg, | |
1968 | "--fire-once-after")) { | |
1969 | goto error; | |
1970 | } | |
1971 | ||
1972 | break; | |
1973 | } | |
1974 | case OPT_FIRE_EVERY: | |
1975 | { | |
1976 | if (!assign_string(&fire_every_str, item_opt->arg, | |
1977 | "--fire-every")) { | |
1978 | goto error; | |
1979 | } | |
1980 | ||
1981 | break; | |
1982 | } | |
1983 | case OPT_USER_ID: | |
1984 | { | |
1985 | if (!assign_string(&user_id, item_opt->arg, | |
1986 | "--user-id")) { | |
1987 | goto error; | |
1988 | } | |
1989 | ||
1990 | break; | |
1991 | } | |
1992 | default: | |
1993 | abort(); | |
1994 | } | |
1995 | } | |
1996 | ||
1997 | if (!condition) { | |
1998 | ERR("Missing --condition."); | |
1999 | goto error; | |
2000 | } | |
2001 | ||
2002 | if (lttng_dynamic_pointer_array_get_count(&actions) == 0) { | |
2003 | ERR("Need at least one --action."); | |
2004 | goto error; | |
2005 | } | |
2006 | ||
2007 | if (fire_every_str && fire_once_after_str) { | |
2008 | ERR("Can't specify both --fire-once-after and --fire-every."); | |
2009 | goto error; | |
2010 | } | |
2011 | ||
2012 | action_group = lttng_action_group_create(); | |
2013 | if (!action_group) { | |
2014 | goto error; | |
2015 | } | |
2016 | ||
2017 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&actions); i++) { | |
2018 | enum lttng_action_status status; | |
2019 | ||
2020 | action = lttng_dynamic_pointer_array_steal_pointer(&actions, i); | |
2021 | ||
2022 | status = lttng_action_group_add_action(action_group, action); | |
2023 | if (status != LTTNG_ACTION_STATUS_OK) { | |
2024 | goto error; | |
2025 | } | |
2026 | ||
2027 | /* | |
2028 | * The `lttng_action_group_add_action()` takes a reference to | |
2029 | * the action. We can destroy ours. | |
2030 | */ | |
2031 | lttng_action_destroy(action); | |
2032 | action = NULL; | |
2033 | } | |
2034 | ||
2035 | trigger = lttng_trigger_create(condition, action_group); | |
2036 | if (!trigger) { | |
2037 | goto error; | |
2038 | } | |
2039 | ||
2040 | if (id) { | |
2041 | enum lttng_trigger_status trigger_status = | |
2042 | lttng_trigger_set_name(trigger, id); | |
2043 | ||
2044 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
2045 | ERR("Failed to set trigger id."); | |
2046 | goto error; | |
2047 | } | |
2048 | } | |
2049 | ||
2050 | if (fire_once_after_str) { | |
2051 | unsigned long long threshold; | |
2052 | enum lttng_trigger_status trigger_status; | |
2053 | ||
2054 | if (utils_parse_unsigned_long_long(fire_once_after_str, &threshold) != 0) { | |
2055 | ERR("Failed to parse `%s` as an integer.", fire_once_after_str); | |
2056 | goto error; | |
2057 | } | |
2058 | ||
2059 | trigger_status = lttng_trigger_set_firing_policy(trigger, | |
2060 | LTTNG_TRIGGER_FIRING_POLICY_ONCE_AFTER_N, | |
2061 | threshold); | |
2062 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
2063 | ERR("Failed to set trigger's policy to `fire once after N`."); | |
2064 | goto error; | |
2065 | } | |
2066 | } | |
2067 | ||
2068 | if (fire_every_str) { | |
2069 | unsigned long long threshold; | |
2070 | enum lttng_trigger_status trigger_status; | |
2071 | ||
2072 | if (utils_parse_unsigned_long_long(fire_every_str, &threshold) != 0) { | |
2073 | ERR("Failed to parse `%s` as an integer.", fire_every_str); | |
2074 | goto error; | |
2075 | } | |
2076 | ||
2077 | trigger_status = lttng_trigger_set_firing_policy(trigger, | |
2078 | LTTNG_TRIGGER_FIRING_POLICY_EVERY_N, threshold); | |
2079 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
2080 | ERR("Failed to set trigger's policy to `fire every N`."); | |
2081 | goto error; | |
2082 | } | |
2083 | } | |
2084 | ||
2085 | if (user_id) { | |
2086 | enum lttng_trigger_status trigger_status; | |
2087 | char *end; | |
2088 | long long uid; | |
2089 | ||
2090 | errno = 0; | |
2091 | uid = strtol(user_id, &end, 10); | |
2092 | if (end == user_id || *end != '\0' || errno != 0) { | |
2093 | ERR("Failed to parse `%s` as a user id.", user_id); | |
2094 | } | |
2095 | ||
2096 | trigger_status = lttng_trigger_set_owner_uid(trigger, uid); | |
2097 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
2098 | ERR("Failed to set trigger's user identity."); | |
2099 | goto error; | |
2100 | } | |
2101 | } | |
2102 | ||
2103 | ret = lttng_register_trigger(trigger); | |
2104 | if (ret) { | |
2105 | ERR("Failed to register trigger: %s.", lttng_strerror(ret)); | |
2106 | goto error; | |
2107 | } | |
2108 | ||
2109 | MSG("Trigger registered successfully."); | |
2110 | ||
2111 | goto end; | |
2112 | ||
2113 | error: | |
2114 | ret = 1; | |
2115 | ||
2116 | end: | |
2117 | argpar_state_destroy(argpar_state); | |
2118 | argpar_item_destroy(argpar_item); | |
2119 | lttng_dynamic_pointer_array_reset(&actions); | |
2120 | lttng_condition_destroy(condition); | |
2121 | lttng_action_destroy(action_group); | |
2122 | lttng_action_destroy(action); | |
2123 | lttng_trigger_destroy(trigger); | |
2124 | free(error); | |
2125 | free(id); | |
2126 | free(fire_once_after_str); | |
2127 | free(fire_every_str); | |
2128 | free(user_id); | |
2129 | return ret; | |
2130 | } |