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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> | |
57739a6b | 10 | #include <string.h> |
4624dad0 SM |
11 | |
12 | #include "../command.h" | |
13 | #include "../loglevel.h" | |
14 | #include "../uprobe.h" | |
15 | ||
16 | #include "common/argpar/argpar.h" | |
17 | #include "common/dynamic-array.h" | |
18 | #include "common/string-utils/string-utils.h" | |
19 | #include "common/utils.h" | |
20 | /* For lttng_event_rule_type_str(). */ | |
21 | #include <lttng/event-rule/event-rule-internal.h> | |
22 | #include <lttng/lttng.h> | |
20a01d15 SM |
23 | #include "common/filter/filter-ast.h" |
24 | #include "common/filter/filter-ir.h" | |
25 | #include "common/dynamic-array.h" | |
4624dad0 SM |
26 | |
27 | #if (LTTNG_SYMBOL_NAME_LEN == 256) | |
28 | #define LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API "255" | |
29 | #endif | |
30 | ||
31 | #ifdef LTTNG_EMBED_HELP | |
32 | static const char help_msg[] = | |
33 | #include <lttng-add-trigger.1.h> | |
34 | ; | |
35 | #endif | |
36 | ||
37 | enum { | |
38 | OPT_HELP, | |
39 | OPT_LIST_OPTIONS, | |
40 | ||
41 | OPT_CONDITION, | |
42 | OPT_ACTION, | |
43 | OPT_ID, | |
481c5310 | 44 | OPT_OWNER_UID, |
bbadb5e0 | 45 | OPT_RATE_POLICY, |
4624dad0 | 46 | |
50ad0862 | 47 | OPT_NAME, |
4624dad0 | 48 | OPT_FILTER, |
b03a81fb | 49 | OPT_EXCLUDE_NAME, |
50ad0862 | 50 | OPT_EVENT_NAME, |
949f049b | 51 | OPT_LOG_LEVEL, |
4624dad0 | 52 | |
64c34630 | 53 | OPT_DOMAIN, |
24de704e SM |
54 | OPT_TYPE, |
55 | OPT_LOCATION, | |
4624dad0 | 56 | |
4624dad0 SM |
57 | OPT_MAX_SIZE, |
58 | OPT_DATA_URL, | |
59 | OPT_CTRL_URL, | |
60 | OPT_URL, | |
61 | OPT_PATH, | |
20a01d15 SM |
62 | |
63 | OPT_CAPTURE, | |
4624dad0 SM |
64 | }; |
65 | ||
66 | static const struct argpar_opt_descr event_rule_opt_descrs[] = { | |
4624dad0 | 67 | { OPT_FILTER, 'f', "filter", true }, |
50ad0862 | 68 | { OPT_NAME, 'n', "name", true }, |
b03a81fb | 69 | { OPT_EXCLUDE_NAME, 'x', "exclude-name", true }, |
949f049b | 70 | { OPT_LOG_LEVEL, 'l', "log-level", true }, |
50ad0862 | 71 | { OPT_EVENT_NAME, 'E', "event-name", true }, |
4624dad0 | 72 | |
64c34630 | 73 | { OPT_DOMAIN, 'd', "domain", true }, |
24de704e SM |
74 | { OPT_TYPE, 't', "type", true }, |
75 | { OPT_LOCATION, 'L', "location", true }, | |
4624dad0 | 76 | |
20a01d15 SM |
77 | /* Capture descriptor */ |
78 | { OPT_CAPTURE, '\0', "capture", true }, | |
79 | ||
4624dad0 SM |
80 | ARGPAR_OPT_DESCR_SENTINEL |
81 | }; | |
82 | ||
83 | static | |
64c34630 | 84 | bool assign_domain_type(enum lttng_domain_type *dest, const char *arg) |
4624dad0 SM |
85 | { |
86 | bool ret; | |
87 | ||
64c34630 SM |
88 | if (*dest != LTTNG_DOMAIN_NONE) { |
89 | ERR("More than one `--domain` was specified."); | |
90 | goto error; | |
91 | } | |
92 | ||
93 | if (strcmp(arg, "kernel") == 0) { | |
94 | *dest = LTTNG_DOMAIN_KERNEL; | |
95 | } else if (strcmp(arg, "user") == 0 || strcmp(arg, "userspace") == 0) { | |
96 | *dest = LTTNG_DOMAIN_UST; | |
97 | } else if (strcmp(arg, "jul") == 0) { | |
98 | *dest = LTTNG_DOMAIN_JUL; | |
99 | } else if (strcmp(arg, "log4j") == 0) { | |
100 | *dest = LTTNG_DOMAIN_LOG4J; | |
101 | } else if (strcmp(arg, "python") == 0) { | |
102 | *dest = LTTNG_DOMAIN_PYTHON; | |
4624dad0 | 103 | } else { |
64c34630 SM |
104 | ERR("Invalid `--domain` value: %s", arg); |
105 | goto error; | |
4624dad0 SM |
106 | } |
107 | ||
64c34630 SM |
108 | ret = true; |
109 | goto end; | |
110 | ||
111 | error: | |
112 | ret = false; | |
113 | ||
114 | end: | |
4624dad0 SM |
115 | return ret; |
116 | } | |
117 | ||
118 | static | |
24de704e | 119 | bool assign_event_rule_type(enum lttng_event_rule_type *dest, const char *arg) |
4624dad0 SM |
120 | { |
121 | bool ret; | |
122 | ||
24de704e SM |
123 | if (*dest != LTTNG_EVENT_RULE_TYPE_UNKNOWN) { |
124 | ERR("More than one `--type` was specified."); | |
125 | goto error; | |
126 | } | |
127 | ||
128 | if (strcmp(arg, "tracepoint") == 0 || strcmp(arg, "logging") == 0) { | |
129 | *dest = LTTNG_EVENT_RULE_TYPE_TRACEPOINT; | |
57739a6b JR |
130 | } else if (strcmp(arg, "kprobe") == 0 || |
131 | strcmp(arg, "kernel-probe") == 0) { | |
24de704e | 132 | *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE; |
57739a6b JR |
133 | } else if (strcmp(arg, "uprobe") == 0 || |
134 | strcmp(arg, "userspace-probe") == 0) { | |
24de704e | 135 | *dest = LTTNG_EVENT_RULE_TYPE_USERSPACE_PROBE; |
57739a6b | 136 | } else if (strcmp(arg, "function") == 0) { |
24de704e | 137 | *dest = LTTNG_EVENT_RULE_TYPE_KERNEL_FUNCTION; |
57739a6b JR |
138 | } else if (strncmp(arg, "syscall", strlen("syscall")) == 0) { |
139 | /* | |
140 | * Matches the following: | |
141 | * - syscall | |
142 | * - syscall:entry | |
143 | * - syscall:exit | |
144 | * - syscall:entry+exit | |
145 | * - syscall:* | |
146 | * | |
147 | * Validation for the right side is left to further usage sites. | |
148 | */ | |
24de704e | 149 | *dest = LTTNG_EVENT_RULE_TYPE_SYSCALL; |
4624dad0 | 150 | } else { |
24de704e SM |
151 | ERR("Invalid `--type` value: %s", arg); |
152 | goto error; | |
4624dad0 SM |
153 | } |
154 | ||
24de704e SM |
155 | ret = true; |
156 | goto end; | |
157 | ||
158 | error: | |
159 | ret = false; | |
160 | ||
161 | end: | |
4624dad0 SM |
162 | return ret; |
163 | } | |
164 | ||
165 | static | |
166 | bool assign_string(char **dest, const char *src, const char *opt_name) | |
167 | { | |
168 | bool ret; | |
169 | ||
170 | if (*dest) { | |
171 | ERR("Duplicate '%s' given.", opt_name); | |
172 | goto error; | |
173 | } | |
174 | ||
175 | *dest = strdup(src); | |
176 | if (!*dest) { | |
177 | PERROR("Failed to allocate string '%s'.", opt_name); | |
178 | goto error; | |
179 | } | |
180 | ||
181 | ret = true; | |
182 | goto end; | |
183 | ||
184 | error: | |
185 | ret = false; | |
186 | ||
187 | end: | |
188 | return ret; | |
189 | } | |
190 | ||
57739a6b JR |
191 | static bool parse_syscall_emission_site_from_type(const char *str, |
192 | enum lttng_event_rule_syscall_emission_site_type *type) | |
193 | { | |
194 | bool ret = false; | |
195 | if (strcmp(str, "syscall") == 0 || | |
196 | strcmp(str, "syscall:entry+exit") == 0) { | |
197 | *type = LTTNG_EVENT_RULE_SYSCALL_EMISSION_SITE_ENTRY_EXIT; | |
198 | } else if (strcmp(str, "syscall:entry") == 0) { | |
199 | *type = LTTNG_EVENT_RULE_SYSCALL_EMISSION_SITE_ENTRY; | |
200 | } else if (strcmp(str, "syscall:exit") == 0) { | |
201 | *type = LTTNG_EVENT_RULE_SYSCALL_EMISSION_SITE_EXIT; | |
202 | } else { | |
203 | goto error; | |
204 | } | |
205 | ||
206 | ret = true; | |
207 | ||
208 | error: | |
209 | return ret; | |
210 | } | |
211 | ||
4624dad0 SM |
212 | /* This is defined in enable_events.c. */ |
213 | LTTNG_HIDDEN | |
b03a81fb SM |
214 | int validate_exclusion_list( |
215 | const char *event_name, const char *const *exclusions); | |
4624dad0 SM |
216 | |
217 | /* | |
949f049b SM |
218 | * Parse `str` as a log level in domain `domain_type`. |
219 | * | |
220 | * Return the log level in `*log_level`. Return true in `*log_level_only` if | |
221 | * the string specifies exactly this log level, false if it specifies at least | |
222 | * this log level. | |
223 | * | |
224 | * Return true if the string was successfully parsed as a log level string. | |
4624dad0 | 225 | */ |
949f049b SM |
226 | static bool parse_log_level_string(const char *str, |
227 | enum lttng_domain_type domain_type, | |
228 | int *log_level, | |
229 | bool *log_level_only) | |
4624dad0 | 230 | { |
949f049b SM |
231 | bool ret; |
232 | ||
4624dad0 SM |
233 | switch (domain_type) { |
234 | case LTTNG_DOMAIN_UST: | |
235 | { | |
949f049b SM |
236 | enum lttng_loglevel log_level_min, log_level_max; |
237 | if (!loglevel_parse_range_string( | |
238 | str, &log_level_min, &log_level_max)) { | |
239 | goto error; | |
240 | } | |
4624dad0 | 241 | |
949f049b SM |
242 | /* Only support VAL and VAL.. for now. */ |
243 | if (log_level_min != log_level_max && | |
244 | log_level_max != LTTNG_LOGLEVEL_EMERG) { | |
245 | goto error; | |
246 | } | |
247 | ||
248 | *log_level = (int) log_level_min; | |
249 | *log_level_only = log_level_min == log_level_max; | |
250 | break; | |
4624dad0 SM |
251 | } |
252 | case LTTNG_DOMAIN_LOG4J: | |
253 | { | |
949f049b SM |
254 | enum lttng_loglevel_log4j log_level_min, log_level_max; |
255 | if (!loglevel_log4j_parse_range_string( | |
256 | str, &log_level_min, &log_level_max)) { | |
257 | goto error; | |
258 | } | |
4624dad0 | 259 | |
949f049b SM |
260 | /* Only support VAL and VAL.. for now. */ |
261 | if (log_level_min != log_level_max && | |
262 | log_level_max != LTTNG_LOGLEVEL_LOG4J_FATAL) { | |
263 | goto error; | |
264 | } | |
265 | ||
266 | *log_level = (int) log_level_min; | |
267 | *log_level_only = log_level_min == log_level_max; | |
268 | break; | |
4624dad0 SM |
269 | } |
270 | case LTTNG_DOMAIN_JUL: | |
271 | { | |
949f049b SM |
272 | enum lttng_loglevel_jul log_level_min, log_level_max; |
273 | if (!loglevel_jul_parse_range_string( | |
274 | str, &log_level_min, &log_level_max)) { | |
275 | goto error; | |
276 | } | |
4624dad0 | 277 | |
949f049b SM |
278 | /* Only support VAL and VAL.. for now. */ |
279 | if (log_level_min != log_level_max && | |
280 | log_level_max != LTTNG_LOGLEVEL_JUL_SEVERE) { | |
281 | goto error; | |
282 | } | |
283 | ||
284 | *log_level = (int) log_level_min; | |
285 | *log_level_only = log_level_min == log_level_max; | |
286 | break; | |
4624dad0 SM |
287 | } |
288 | case LTTNG_DOMAIN_PYTHON: | |
289 | { | |
949f049b SM |
290 | enum lttng_loglevel_python log_level_min, log_level_max; |
291 | if (!loglevel_python_parse_range_string( | |
292 | str, &log_level_min, &log_level_max)) { | |
293 | goto error; | |
294 | } | |
4624dad0 | 295 | |
949f049b SM |
296 | /* Only support VAL and VAL.. for now. */ |
297 | if (log_level_min != log_level_max && | |
298 | log_level_max != | |
299 | LTTNG_LOGLEVEL_PYTHON_CRITICAL) { | |
300 | goto error; | |
301 | } | |
302 | ||
303 | *log_level = (int) log_level_min; | |
304 | *log_level_only = log_level_min == log_level_max; | |
305 | break; | |
4624dad0 SM |
306 | } |
307 | default: | |
308 | /* Invalid domain type. */ | |
309 | abort(); | |
310 | } | |
949f049b SM |
311 | |
312 | ret = true; | |
313 | goto end; | |
314 | ||
315 | error: | |
316 | ret = false; | |
317 | ||
318 | end: | |
319 | return ret; | |
4624dad0 SM |
320 | } |
321 | ||
322 | static int parse_kernel_probe_opts(const char *source, | |
323 | struct lttng_kernel_probe_location **location) | |
324 | { | |
325 | int ret = 0; | |
326 | int match; | |
327 | char s_hex[19]; | |
328 | char name[LTTNG_SYMBOL_NAME_LEN]; | |
329 | char *symbol_name = NULL; | |
330 | uint64_t offset; | |
331 | ||
332 | /* Check for symbol+offset. */ | |
333 | match = sscanf(source, | |
334 | "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API | |
335 | "[^'+']+%18s", | |
336 | name, s_hex); | |
337 | if (match == 2) { | |
338 | if (*s_hex == '\0') { | |
339 | ERR("Kernel probe symbol offset is missing."); | |
340 | goto error; | |
341 | } | |
342 | ||
343 | symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN); | |
344 | if (!symbol_name) { | |
345 | PERROR("Failed to copy kernel probe location symbol name."); | |
346 | goto error; | |
347 | } | |
348 | offset = strtoul(s_hex, NULL, 0); | |
349 | ||
350 | *location = lttng_kernel_probe_location_symbol_create( | |
351 | symbol_name, offset); | |
f6e30a8a | 352 | if (!*location) { |
4624dad0 SM |
353 | ERR("Failed to create symbol kernel probe location."); |
354 | goto error; | |
355 | } | |
356 | ||
357 | goto end; | |
358 | } | |
359 | ||
360 | /* Check for symbol. */ | |
361 | if (isalpha(name[0]) || name[0] == '_') { | |
362 | match = sscanf(source, | |
363 | "%" LTTNG_SYMBOL_NAME_LEN_SCANF_IS_A_BROKEN_API | |
364 | "s", | |
365 | name); | |
366 | if (match == 1) { | |
367 | symbol_name = strndup(name, LTTNG_SYMBOL_NAME_LEN); | |
368 | if (!symbol_name) { | |
369 | ERR("Failed to copy kernel probe location symbol name."); | |
370 | goto error; | |
371 | } | |
372 | ||
373 | *location = lttng_kernel_probe_location_symbol_create( | |
374 | symbol_name, 0); | |
14f27f79 | 375 | if (!*location) { |
4624dad0 SM |
376 | ERR("Failed to create symbol kernel probe location."); |
377 | goto error; | |
378 | } | |
379 | ||
380 | goto end; | |
381 | } | |
382 | } | |
383 | ||
384 | /* Check for address. */ | |
385 | match = sscanf(source, "%18s", s_hex); | |
386 | if (match > 0) { | |
387 | uint64_t address; | |
388 | ||
389 | if (*s_hex == '\0') { | |
390 | ERR("Invalid kernel probe location address."); | |
391 | goto error; | |
392 | } | |
393 | ||
394 | address = strtoul(s_hex, NULL, 0); | |
395 | *location = lttng_kernel_probe_location_address_create(address); | |
5c6ca809 | 396 | if (!*location) { |
4624dad0 SM |
397 | ERR("Failed to create symbol kernel probe location."); |
398 | goto error; | |
399 | } | |
400 | ||
401 | goto end; | |
402 | } | |
403 | ||
404 | error: | |
405 | /* No match */ | |
406 | ret = -1; | |
407 | *location = NULL; | |
408 | ||
409 | end: | |
410 | free(symbol_name); | |
411 | return ret; | |
412 | } | |
413 | ||
20a01d15 SM |
414 | static |
415 | struct lttng_event_expr *ir_op_load_expr_to_event_expr( | |
3363a4c3 JG |
416 | const struct ir_load_expression *load_expr, |
417 | const char *capture_str) | |
20a01d15 SM |
418 | { |
419 | char *provider_name = NULL; | |
420 | struct lttng_event_expr *event_expr = NULL; | |
3363a4c3 JG |
421 | const struct ir_load_expression_op *load_expr_op = load_expr->child; |
422 | const enum ir_load_expression_type load_expr_child_type = | |
423 | load_expr_op->type; | |
20a01d15 | 424 | |
3363a4c3 | 425 | switch (load_expr_child_type) { |
20a01d15 SM |
426 | case IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT: |
427 | case IR_LOAD_EXPRESSION_GET_CONTEXT_ROOT: | |
428 | { | |
429 | const char *field_name; | |
430 | ||
431 | load_expr_op = load_expr_op->next; | |
432 | assert(load_expr_op); | |
433 | assert(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL); | |
434 | field_name = load_expr_op->u.symbol; | |
435 | assert(field_name); | |
436 | ||
3363a4c3 | 437 | event_expr = load_expr_child_type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ? |
20a01d15 SM |
438 | lttng_event_expr_event_payload_field_create(field_name) : |
439 | lttng_event_expr_channel_context_field_create(field_name); | |
440 | if (!event_expr) { | |
441 | ERR("Failed to create %s event expression: field name = `%s`.", | |
3363a4c3 | 442 | load_expr_child_type == IR_LOAD_EXPRESSION_GET_PAYLOAD_ROOT ? |
20a01d15 SM |
443 | "payload field" : "channel context", |
444 | field_name); | |
445 | goto error; | |
446 | } | |
447 | ||
448 | break; | |
449 | } | |
450 | case IR_LOAD_EXPRESSION_GET_APP_CONTEXT_ROOT: | |
451 | { | |
452 | const char *colon; | |
453 | const char *type_name; | |
454 | const char *field_name; | |
455 | ||
456 | load_expr_op = load_expr_op->next; | |
457 | assert(load_expr_op); | |
458 | assert(load_expr_op->type == IR_LOAD_EXPRESSION_GET_SYMBOL); | |
459 | field_name = load_expr_op->u.symbol; | |
460 | assert(field_name); | |
461 | ||
462 | /* | |
463 | * The field name needs to be of the form PROVIDER:TYPE. We | |
464 | * split it here. | |
465 | */ | |
466 | colon = strchr(field_name, ':'); | |
467 | if (!colon) { | |
468 | ERR("Invalid app-specific context field name: missing colon in `%s`.", | |
469 | field_name); | |
470 | goto error; | |
471 | } | |
472 | ||
473 | type_name = colon + 1; | |
474 | if (*type_name == '\0') { | |
475 | ERR("Invalid app-specific context field name: missing type name after colon in `%s`.", | |
476 | field_name); | |
477 | goto error; | |
478 | } | |
479 | ||
480 | provider_name = strndup(field_name, colon - field_name); | |
481 | if (!provider_name) { | |
482 | PERROR("Failed to allocate field name string"); | |
483 | goto error; | |
484 | } | |
485 | ||
486 | event_expr = lttng_event_expr_app_specific_context_field_create( | |
487 | provider_name, type_name); | |
488 | if (!event_expr) { | |
489 | ERR("Failed to create app-specific context field event expression: provider name = `%s`, type name = `%s`", | |
490 | provider_name, type_name); | |
491 | goto error; | |
492 | } | |
493 | ||
494 | break; | |
495 | } | |
496 | default: | |
497 | ERR("%s: unexpected load expr type %d.", __func__, | |
498 | load_expr_op->type); | |
499 | abort(); | |
500 | } | |
501 | ||
502 | load_expr_op = load_expr_op->next; | |
503 | ||
504 | /* There may be a single array index after that. */ | |
505 | if (load_expr_op->type == IR_LOAD_EXPRESSION_GET_INDEX) { | |
506 | struct lttng_event_expr *index_event_expr; | |
507 | const uint64_t index = load_expr_op->u.index; | |
508 | ||
509 | index_event_expr = lttng_event_expr_array_field_element_create(event_expr, index); | |
510 | if (!index_event_expr) { | |
511 | ERR("Failed to create array field element event expression."); | |
512 | goto error; | |
513 | } | |
514 | ||
515 | event_expr = index_event_expr; | |
516 | load_expr_op = load_expr_op->next; | |
517 | } | |
518 | ||
519 | switch (load_expr_op->type) { | |
520 | case IR_LOAD_EXPRESSION_LOAD_FIELD: | |
521 | /* | |
522 | * This is what we expect, IR_LOAD_EXPRESSION_LOAD_FIELD is | |
523 | * always found at the end of the chain. | |
524 | */ | |
525 | break; | |
526 | case IR_LOAD_EXPRESSION_GET_SYMBOL: | |
527 | ERR("While parsing expression `%s`: Capturing subfields is not supported.", | |
528 | capture_str); | |
529 | goto error; | |
530 | ||
531 | default: | |
532 | ERR("%s: unexpected load expression operator %s.", __func__, | |
533 | ir_load_expression_type_str(load_expr_op->type)); | |
534 | abort(); | |
535 | } | |
536 | ||
537 | goto end; | |
538 | ||
539 | error: | |
540 | lttng_event_expr_destroy(event_expr); | |
541 | event_expr = NULL; | |
542 | ||
543 | end: | |
544 | free(provider_name); | |
545 | ||
546 | return event_expr; | |
547 | } | |
548 | ||
549 | static | |
550 | struct lttng_event_expr *ir_op_load_to_event_expr( | |
551 | const struct ir_op *ir, const char *capture_str) | |
552 | { | |
553 | struct lttng_event_expr *event_expr = NULL; | |
554 | ||
555 | assert(ir->op == IR_OP_LOAD); | |
556 | ||
557 | switch (ir->data_type) { | |
558 | case IR_DATA_EXPRESSION: | |
559 | { | |
560 | const struct ir_load_expression *ir_load_expr = | |
561 | ir->u.load.u.expression; | |
562 | ||
563 | event_expr = ir_op_load_expr_to_event_expr( | |
564 | ir_load_expr, capture_str); | |
565 | break; | |
566 | } | |
567 | default: | |
568 | ERR("%s: unexpected data type: %s.", __func__, | |
569 | ir_data_type_str(ir->data_type)); | |
570 | abort(); | |
571 | } | |
572 | ||
573 | return event_expr; | |
574 | } | |
575 | ||
576 | static | |
577 | const char *ir_operator_type_human_str(enum ir_op_type op) | |
578 | { | |
579 | const char *name; | |
580 | ||
581 | switch (op) { | |
582 | case IR_OP_BINARY: | |
583 | name = "Binary"; | |
584 | break; | |
585 | case IR_OP_UNARY: | |
586 | name = "Unary"; | |
587 | break; | |
588 | case IR_OP_LOGICAL: | |
589 | name = "Logical"; | |
590 | break; | |
591 | default: | |
592 | abort(); | |
593 | } | |
594 | ||
595 | return name; | |
596 | } | |
597 | ||
598 | static | |
599 | struct lttng_event_expr *ir_op_root_to_event_expr(const struct ir_op *ir, | |
600 | const char *capture_str) | |
601 | { | |
602 | struct lttng_event_expr *event_expr = NULL; | |
603 | ||
604 | assert(ir->op == IR_OP_ROOT); | |
605 | ir = ir->u.root.child; | |
606 | ||
607 | switch (ir->op) { | |
608 | case IR_OP_LOAD: | |
609 | event_expr = ir_op_load_to_event_expr(ir, capture_str); | |
610 | break; | |
611 | case IR_OP_BINARY: | |
612 | case IR_OP_UNARY: | |
613 | case IR_OP_LOGICAL: | |
614 | ERR("While parsing expression `%s`: %s operators are not allowed in capture expressions.", | |
615 | capture_str, | |
616 | ir_operator_type_human_str(ir->op)); | |
617 | break; | |
618 | default: | |
619 | ERR("%s: unexpected IR op type: %s.", __func__, | |
620 | ir_op_type_str(ir->op)); | |
621 | abort(); | |
622 | } | |
623 | ||
624 | return event_expr; | |
625 | } | |
626 | ||
627 | static | |
628 | void destroy_event_expr(void *ptr) | |
629 | { | |
630 | lttng_event_expr_destroy(ptr); | |
631 | } | |
632 | ||
633 | struct parse_event_rule_res { | |
634 | /* Owned by this. */ | |
635 | struct lttng_event_rule *er; | |
636 | ||
637 | /* Array of `struct lttng_event_expr *` */ | |
638 | struct lttng_dynamic_pointer_array capture_descriptors; | |
639 | }; | |
640 | ||
641 | static | |
642 | struct parse_event_rule_res parse_event_rule(int *argc, const char ***argv) | |
4624dad0 | 643 | { |
4624dad0 SM |
644 | enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE; |
645 | enum lttng_event_rule_type event_rule_type = | |
646 | LTTNG_EVENT_RULE_TYPE_UNKNOWN; | |
647 | struct argpar_state *state; | |
648 | struct argpar_item *item = NULL; | |
649 | char *error = NULL; | |
650 | int consumed_args = -1; | |
651 | struct lttng_kernel_probe_location *kernel_probe_location = NULL; | |
652 | struct lttng_userspace_probe_location *userspace_probe_location = NULL; | |
20a01d15 SM |
653 | struct parse_event_rule_res res = { 0 }; |
654 | struct lttng_event_expr *event_expr = NULL; | |
655 | struct filter_parser_ctx *parser_ctx = NULL; | |
85b05318 | 656 | struct lttng_log_level_rule *log_level_rule = NULL; |
4624dad0 | 657 | |
57739a6b JR |
658 | /* Event rule type option */ |
659 | char *event_rule_type_str = NULL; | |
660 | ||
50ad0862 SM |
661 | /* Tracepoint and syscall options. */ |
662 | char *name = NULL; | |
b03a81fb SM |
663 | /* Array of strings. */ |
664 | struct lttng_dynamic_pointer_array exclude_names; | |
4624dad0 | 665 | |
24de704e SM |
666 | /* For userspace / kernel probe and function. */ |
667 | char *location = NULL; | |
668 | char *event_name = NULL; | |
4624dad0 SM |
669 | |
670 | /* Filter. */ | |
671 | char *filter = NULL; | |
672 | ||
4624dad0 | 673 | /* Log level. */ |
949f049b | 674 | char *log_level_str = NULL; |
4624dad0 | 675 | |
20a01d15 SM |
676 | lttng_dynamic_pointer_array_init(&res.capture_descriptors, |
677 | destroy_event_expr); | |
b03a81fb SM |
678 | |
679 | lttng_dynamic_pointer_array_init(&exclude_names, free); | |
680 | ||
4624dad0 SM |
681 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); |
682 | if (!state) { | |
683 | ERR("Failed to allocate an argpar state."); | |
684 | goto error; | |
685 | } | |
686 | ||
687 | while (true) { | |
688 | enum argpar_state_parse_next_status status; | |
689 | ||
690 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
691 | status = argpar_state_parse_next(state, &item, &error); | |
692 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
693 | ERR("%s", error); | |
694 | goto error; | |
695 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
696 | /* Just stop parsing here. */ | |
697 | break; | |
698 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
699 | break; | |
700 | } | |
701 | ||
702 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
703 | ||
704 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
705 | const struct argpar_item_opt *item_opt = | |
706 | (const struct argpar_item_opt *) item; | |
707 | ||
708 | switch (item_opt->descr->id) { | |
709 | /* Domains. */ | |
64c34630 | 710 | case OPT_DOMAIN: |
24de704e SM |
711 | if (!assign_domain_type(&domain_type, |
712 | item_opt->arg)) { | |
4624dad0 SM |
713 | goto error; |
714 | } | |
715 | ||
716 | break; | |
24de704e | 717 | case OPT_TYPE: |
4624dad0 | 718 | if (!assign_event_rule_type(&event_rule_type, |
24de704e | 719 | item_opt->arg)) { |
4624dad0 SM |
720 | goto error; |
721 | } | |
722 | ||
57739a6b JR |
723 | /* Save the string for later use. */ |
724 | if (!assign_string(&event_rule_type_str, | |
725 | item_opt->arg, | |
726 | "--type/-t")) { | |
727 | goto error; | |
728 | } | |
729 | ||
4624dad0 | 730 | break; |
24de704e SM |
731 | case OPT_LOCATION: |
732 | if (!assign_string(&location, | |
733 | item_opt->arg, | |
734 | "--location/-L")) { | |
50ad0862 SM |
735 | goto error; |
736 | } | |
737 | ||
738 | break; | |
739 | case OPT_EVENT_NAME: | |
24de704e | 740 | if (!assign_string(&event_name, |
50ad0862 SM |
741 | item_opt->arg, |
742 | "--event-name/-E")) { | |
743 | goto error; | |
4624dad0 SM |
744 | } |
745 | ||
4624dad0 SM |
746 | break; |
747 | case OPT_FILTER: | |
748 | if (!assign_string(&filter, item_opt->arg, | |
749 | "--filter/-f")) { | |
750 | goto error; | |
751 | } | |
752 | ||
753 | break; | |
50ad0862 SM |
754 | case OPT_NAME: |
755 | if (!assign_string(&name, item_opt->arg, | |
756 | "--name/-n")) { | |
757 | goto error; | |
758 | } | |
759 | ||
760 | break; | |
b03a81fb SM |
761 | case OPT_EXCLUDE_NAME: |
762 | { | |
763 | int ret; | |
764 | ||
765 | ret = lttng_dynamic_pointer_array_add_pointer( | |
766 | &exclude_names, | |
767 | strdup(item_opt->arg)); | |
768 | if (ret != 0) { | |
769 | ERR("Failed to add pointer to dynamic pointer array."); | |
4624dad0 SM |
770 | goto error; |
771 | } | |
772 | ||
773 | break; | |
b03a81fb | 774 | } |
949f049b SM |
775 | case OPT_LOG_LEVEL: |
776 | if (!assign_string(&log_level_str, | |
777 | item_opt->arg, "--log-level/-l")) { | |
4624dad0 SM |
778 | goto error; |
779 | } | |
780 | ||
4624dad0 | 781 | break; |
20a01d15 SM |
782 | case OPT_CAPTURE: |
783 | { | |
784 | int ret; | |
785 | const char *capture_str = item_opt->arg; | |
786 | ||
787 | ret = filter_parser_ctx_create_from_filter_expression( | |
788 | capture_str, &parser_ctx); | |
789 | if (ret) { | |
790 | ERR("Failed to parse capture expression `%s`.", | |
791 | capture_str); | |
792 | goto error; | |
793 | } | |
794 | ||
795 | event_expr = ir_op_root_to_event_expr( | |
796 | parser_ctx->ir_root, | |
797 | capture_str); | |
798 | if (!event_expr) { | |
799 | /* | |
800 | * ir_op_root_to_event_expr has printed | |
801 | * an error message. | |
802 | */ | |
803 | goto error; | |
804 | } | |
805 | ||
806 | ret = lttng_dynamic_pointer_array_add_pointer( | |
807 | &res.capture_descriptors, | |
808 | event_expr); | |
809 | if (ret) { | |
810 | goto error; | |
811 | } | |
812 | ||
813 | /* | |
814 | * The ownership of event expression was | |
815 | * transferred to the dynamic array. | |
816 | */ | |
817 | event_expr = NULL; | |
818 | ||
819 | break; | |
820 | } | |
4624dad0 SM |
821 | default: |
822 | abort(); | |
823 | } | |
824 | } else { | |
825 | const struct argpar_item_non_opt *item_non_opt = | |
826 | (const struct argpar_item_non_opt *) | |
827 | item; | |
828 | ||
50ad0862 SM |
829 | /* Don't accept non-option arguments. */ |
830 | ERR("Unexpected argument '%s'", item_non_opt->arg); | |
831 | goto error; | |
4624dad0 SM |
832 | } |
833 | } | |
834 | ||
835 | if (event_rule_type == LTTNG_EVENT_RULE_TYPE_UNKNOWN) { | |
836 | event_rule_type = LTTNG_EVENT_RULE_TYPE_TRACEPOINT; | |
837 | } | |
838 | ||
839 | /* | |
50ad0862 SM |
840 | * Option --name is applicable to event rules of type tracepoint |
841 | * and syscall. For tracepoint and syscall rules, if --name is | |
842 | * omitted, it is implicitly "*". | |
4624dad0 | 843 | */ |
50ad0862 SM |
844 | switch (event_rule_type) { |
845 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
846 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
847 | if (!name) { | |
848 | name = strdup("*"); | |
4624dad0 | 849 | } |
50ad0862 | 850 | break; |
4624dad0 | 851 | |
50ad0862 SM |
852 | default: |
853 | if (name) { | |
854 | ERR("Can't use --name with %s event rules.", | |
855 | lttng_event_rule_type_str( | |
856 | event_rule_type)); | |
4624dad0 SM |
857 | goto error; |
858 | } | |
859 | ||
b03a81fb SM |
860 | if (lttng_dynamic_pointer_array_get_count(&exclude_names) > 0) { |
861 | ERR("Can't use --exclude-name/-x with %s event rules.", | |
50ad0862 SM |
862 | lttng_event_rule_type_str( |
863 | event_rule_type)); | |
864 | goto error; | |
865 | } | |
4624dad0 SM |
866 | } |
867 | ||
868 | /* | |
24de704e SM |
869 | * Option --location is only applicable to (and mandatory for) event |
870 | * rules of type {k,u}probe and function. | |
871 | * | |
50ad0862 | 872 | * Option --event-name is only applicable to event rules of type probe. |
24de704e | 873 | * If omitted, it defaults to the location. |
4624dad0 | 874 | */ |
50ad0862 SM |
875 | switch (event_rule_type) { |
876 | case LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE: | |
877 | case LTTNG_EVENT_RULE_TYPE_USERSPACE_PROBE: | |
24de704e SM |
878 | case LTTNG_EVENT_RULE_TYPE_KERNEL_FUNCTION: |
879 | if (!location) { | |
880 | ERR("Event rule of type %s requires a --location.", | |
881 | lttng_event_rule_type_str(event_rule_type)); | |
882 | goto error; | |
883 | } | |
884 | ||
885 | if (!event_name) { | |
886 | event_name = strdup(location); | |
50ad0862 | 887 | } |
4624dad0 | 888 | |
50ad0862 SM |
889 | break; |
890 | ||
891 | default: | |
24de704e SM |
892 | if (location) { |
893 | ERR("Can't use --location with %s event rules.", | |
894 | lttng_event_rule_type_str(event_rule_type)); | |
895 | goto error; | |
896 | } | |
897 | ||
898 | if (event_name) { | |
50ad0862 SM |
899 | ERR("Can't use --event-name with %s event rules.", |
900 | lttng_event_rule_type_str( | |
901 | event_rule_type)); | |
902 | goto error; | |
903 | } | |
4624dad0 SM |
904 | } |
905 | ||
906 | /* | |
907 | * Update *argc and *argv so our caller can keep parsing what follows. | |
908 | */ | |
909 | consumed_args = argpar_state_get_ingested_orig_args(state); | |
910 | assert(consumed_args >= 0); | |
911 | *argc -= consumed_args; | |
912 | *argv += consumed_args; | |
913 | ||
914 | /* Need to specify a domain. */ | |
915 | if (domain_type == LTTNG_DOMAIN_NONE) { | |
64c34630 | 916 | ERR("Please specify a domain (--domain=(kernel,user,jul,log4j,python))."); |
4624dad0 SM |
917 | goto error; |
918 | } | |
919 | ||
920 | /* Validate event rule type against domain. */ | |
921 | switch (event_rule_type) { | |
f2791161 | 922 | case LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE: |
f2d09181 | 923 | case LTTNG_EVENT_RULE_TYPE_KERNEL_FUNCTION: |
1f1567a5 | 924 | case LTTNG_EVENT_RULE_TYPE_USERSPACE_PROBE: |
4624dad0 SM |
925 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: |
926 | if (domain_type != LTTNG_DOMAIN_KERNEL) { | |
927 | ERR("Event type not available for user-space tracing."); | |
928 | goto error; | |
929 | } | |
930 | break; | |
931 | ||
932 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
933 | break; | |
934 | ||
935 | default: | |
936 | abort(); | |
937 | } | |
938 | ||
939 | /* | |
940 | * Adding a filter to a probe, function or userspace-probe would be | |
941 | * denied by the kernel tracer as it's not supported at the moment. We | |
942 | * do an early check here to warn the user. | |
943 | */ | |
944 | if (filter && domain_type == LTTNG_DOMAIN_KERNEL) { | |
945 | switch (event_rule_type) { | |
946 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
947 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
948 | break; | |
949 | default: | |
950 | ERR("Filter expressions are not supported for %s event rules.", | |
951 | lttng_event_rule_type_str(event_rule_type)); | |
952 | goto error; | |
953 | } | |
954 | } | |
955 | ||
b03a81fb SM |
956 | /* If --exclude-name/-x was passed, split it into an exclusion list. */ |
957 | if (lttng_dynamic_pointer_array_get_count(&exclude_names) > 0) { | |
4624dad0 SM |
958 | if (domain_type != LTTNG_DOMAIN_UST) { |
959 | ERR("Event name exclusions are not yet implemented for %s event rules.", | |
960 | get_domain_str(domain_type)); | |
961 | goto error; | |
962 | } | |
963 | ||
b03a81fb SM |
964 | if (validate_exclusion_list(name, |
965 | (const char **) exclude_names.array.buffer | |
966 | .data | |
967 | ||
968 | ) != 0) { | |
969 | /* | |
970 | * Assume validate_exclusion_list already prints an | |
971 | * error message. | |
972 | */ | |
4624dad0 SM |
973 | goto error; |
974 | } | |
975 | } | |
976 | ||
949f049b SM |
977 | if (log_level_str) { |
978 | if (event_rule_type != LTTNG_EVENT_RULE_TYPE_TRACEPOINT) { | |
979 | ERR("Log levels are only applicable to tracepoint event rules."); | |
980 | goto error; | |
981 | } | |
982 | ||
983 | if (domain_type == LTTNG_DOMAIN_KERNEL) { | |
984 | ERR("Log levels are not supported by the kernel tracer."); | |
985 | goto error; | |
986 | } | |
4624dad0 SM |
987 | } |
988 | ||
989 | /* Finally, create the event rule object. */ | |
990 | switch (event_rule_type) { | |
991 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
992 | { | |
993 | enum lttng_event_rule_status event_rule_status; | |
994 | ||
20a01d15 SM |
995 | res.er = lttng_event_rule_tracepoint_create(domain_type); |
996 | if (!res.er) { | |
4624dad0 SM |
997 | ERR("Failed to create tracepoint event rule."); |
998 | goto error; | |
999 | } | |
1000 | ||
1001 | /* Set pattern. */ | |
1002 | event_rule_status = lttng_event_rule_tracepoint_set_pattern( | |
50ad0862 | 1003 | res.er, name); |
4624dad0 SM |
1004 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1005 | ERR("Failed to set tracepoint event rule's pattern to '%s'.", | |
50ad0862 | 1006 | name); |
4624dad0 SM |
1007 | goto error; |
1008 | } | |
1009 | ||
1010 | /* Set filter. */ | |
1011 | if (filter) { | |
1012 | event_rule_status = lttng_event_rule_tracepoint_set_filter( | |
20a01d15 | 1013 | res.er, filter); |
4624dad0 SM |
1014 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1015 | ERR("Failed to set tracepoint event rule's filter to '%s'.", | |
1016 | filter); | |
1017 | goto error; | |
1018 | } | |
1019 | } | |
1020 | ||
1021 | /* Set exclusion list. */ | |
b03a81fb | 1022 | if (lttng_dynamic_pointer_array_get_count(&exclude_names) > 0) { |
4624dad0 | 1023 | int n; |
b03a81fb SM |
1024 | int count = lttng_dynamic_pointer_array_get_count( |
1025 | &exclude_names); | |
1026 | ||
1027 | for (n = 0; n < count; n++) { | |
1028 | const char *exclude_name = | |
1029 | lttng_dynamic_pointer_array_get_pointer( | |
1030 | &exclude_names, | |
1031 | n); | |
1032 | ||
1033 | event_rule_status = | |
1034 | lttng_event_rule_tracepoint_add_exclusion( | |
1035 | res.er, | |
1036 | exclude_name); | |
4624dad0 SM |
1037 | if (event_rule_status != |
1038 | LTTNG_EVENT_RULE_STATUS_OK) { | |
1039 | ERR("Failed to set tracepoint exclusion list element '%s'", | |
b03a81fb | 1040 | exclude_name); |
4624dad0 SM |
1041 | goto error; |
1042 | } | |
1043 | } | |
1044 | } | |
1045 | ||
949f049b SM |
1046 | /* |
1047 | * ".." is the same as passing no log level option and | |
1048 | * correspond the the "ANY" case. | |
1049 | */ | |
1050 | if (log_level_str && strcmp(log_level_str, "..") != 0) { | |
1051 | int log_level; | |
1052 | bool log_level_only; | |
1053 | ||
1054 | if (!parse_log_level_string(log_level_str, domain_type, | |
1055 | &log_level, &log_level_only)) { | |
1056 | ERR("Failed to parse log level string `%s`.", | |
1057 | log_level_str); | |
4624dad0 SM |
1058 | goto error; |
1059 | } | |
1060 | ||
949f049b SM |
1061 | if (log_level_only) { |
1062 | log_level_rule = lttng_log_level_rule_exactly_create(log_level); | |
4624dad0 | 1063 | } else { |
949f049b | 1064 | log_level_rule = lttng_log_level_rule_at_least_as_severe_as_create(log_level); |
85b05318 JR |
1065 | } |
1066 | ||
1067 | if (log_level_rule == NULL) { | |
1068 | ERR("Failed to create log level rule object."); | |
1069 | goto error; | |
4624dad0 SM |
1070 | } |
1071 | ||
85b05318 JR |
1072 | event_rule_status = |
1073 | lttng_event_rule_tracepoint_set_log_level_rule( | |
1074 | res.er, log_level_rule); | |
1075 | ||
4624dad0 SM |
1076 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1077 | ERR("Failed to set log level on event fule."); | |
1078 | goto error; | |
1079 | } | |
1080 | } | |
1081 | ||
1082 | break; | |
1083 | } | |
f2791161 | 1084 | case LTTNG_EVENT_RULE_TYPE_KERNEL_PROBE: |
4624dad0 SM |
1085 | { |
1086 | int ret; | |
1087 | enum lttng_event_rule_status event_rule_status; | |
1088 | ||
50ad0862 | 1089 | ret = parse_kernel_probe_opts( |
24de704e | 1090 | location, &kernel_probe_location); |
4624dad0 SM |
1091 | if (ret) { |
1092 | ERR("Failed to parse kernel probe location."); | |
1093 | goto error; | |
1094 | } | |
1095 | ||
602a6d40 JR |
1096 | assert(kernel_probe_location); |
1097 | res.er = lttng_event_rule_kernel_probe_create(kernel_probe_location); | |
1098 | if (!res.er) { | |
1099 | ERR("Failed to create kprobe event rule."); | |
4624dad0 SM |
1100 | goto error; |
1101 | } | |
1102 | ||
50ad0862 SM |
1103 | event_rule_status = |
1104 | lttng_event_rule_kernel_probe_set_event_name( | |
24de704e | 1105 | res.er, event_name); |
4624dad0 | 1106 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
50ad0862 | 1107 | ERR("Failed to set kprobe event rule's name to '%s'.", |
24de704e | 1108 | event_name); |
4624dad0 SM |
1109 | goto error; |
1110 | } | |
1111 | ||
1112 | break; | |
1113 | } | |
1f1567a5 | 1114 | case LTTNG_EVENT_RULE_TYPE_USERSPACE_PROBE: |
4624dad0 SM |
1115 | { |
1116 | int ret; | |
1117 | enum lttng_event_rule_status event_rule_status; | |
1118 | ||
1119 | ret = parse_userspace_probe_opts( | |
24de704e | 1120 | location, &userspace_probe_location); |
4624dad0 SM |
1121 | if (ret) { |
1122 | ERR("Failed to parse user space probe location."); | |
1123 | goto error; | |
1124 | } | |
1125 | ||
10685de6 | 1126 | res.er = lttng_event_rule_userspace_probe_create(userspace_probe_location); |
20a01d15 SM |
1127 | if (!res.er) { |
1128 | ERR("Failed to create userspace probe event rule."); | |
4624dad0 SM |
1129 | goto error; |
1130 | } | |
1131 | ||
50ad0862 SM |
1132 | event_rule_status = |
1133 | lttng_event_rule_userspace_probe_set_event_name( | |
24de704e | 1134 | res.er, event_name); |
4624dad0 SM |
1135 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1136 | ERR("Failed to set user space probe event rule's name to '%s'.", | |
24de704e | 1137 | event_name); |
4624dad0 SM |
1138 | goto error; |
1139 | } | |
1140 | ||
1141 | break; | |
1142 | } | |
1143 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
1144 | { | |
1145 | enum lttng_event_rule_status event_rule_status; | |
57739a6b JR |
1146 | enum lttng_event_rule_syscall_emission_site_type emission_site_type; |
1147 | ||
1148 | if (!parse_syscall_emission_site_from_type( | |
1149 | event_rule_type_str, &emission_site_type)) { | |
1150 | ERR("Failed to parse syscall type '%s'.", event_rule_type_str); | |
1151 | goto error; | |
1152 | } | |
4624dad0 | 1153 | |
57739a6b | 1154 | res.er = lttng_event_rule_syscall_create(emission_site_type); |
20a01d15 | 1155 | if (!res.er) { |
4624dad0 SM |
1156 | ERR("Failed to create syscall event rule."); |
1157 | goto error; | |
1158 | } | |
1159 | ||
1160 | event_rule_status = lttng_event_rule_syscall_set_pattern( | |
50ad0862 | 1161 | res.er, name); |
4624dad0 SM |
1162 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1163 | ERR("Failed to set syscall event rule's pattern to '%s'.", | |
50ad0862 | 1164 | name); |
4624dad0 SM |
1165 | goto error; |
1166 | } | |
1167 | ||
1168 | if (filter) { | |
1169 | event_rule_status = lttng_event_rule_syscall_set_filter( | |
20a01d15 | 1170 | res.er, filter); |
4624dad0 SM |
1171 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { |
1172 | ERR("Failed to set syscall event rule's filter to '%s'.", | |
1173 | filter); | |
1174 | goto error; | |
1175 | } | |
1176 | } | |
1177 | ||
1178 | break; | |
1179 | } | |
1180 | default: | |
1181 | abort(); | |
1182 | goto error; | |
1183 | } | |
1184 | ||
1185 | goto end; | |
1186 | ||
1187 | error: | |
20a01d15 SM |
1188 | lttng_event_rule_destroy(res.er); |
1189 | res.er = NULL; | |
1190 | lttng_dynamic_pointer_array_reset(&res.capture_descriptors); | |
4624dad0 SM |
1191 | |
1192 | end: | |
20a01d15 SM |
1193 | if (parser_ctx) { |
1194 | filter_parser_ctx_free(parser_ctx); | |
1195 | } | |
1196 | ||
1197 | lttng_event_expr_destroy(event_expr); | |
4624dad0 SM |
1198 | argpar_item_destroy(item); |
1199 | free(error); | |
1200 | argpar_state_destroy(state); | |
1201 | free(filter); | |
50ad0862 | 1202 | free(name); |
b03a81fb | 1203 | lttng_dynamic_pointer_array_reset(&exclude_names); |
949f049b | 1204 | free(log_level_str); |
24de704e SM |
1205 | free(location); |
1206 | free(event_name); | |
57739a6b | 1207 | free(event_rule_type_str); |
50ad0862 | 1208 | |
4624dad0 SM |
1209 | lttng_kernel_probe_location_destroy(kernel_probe_location); |
1210 | lttng_userspace_probe_location_destroy(userspace_probe_location); | |
85b05318 | 1211 | lttng_log_level_rule_destroy(log_level_rule); |
20a01d15 | 1212 | return res; |
4624dad0 SM |
1213 | } |
1214 | ||
1215 | static | |
1216 | struct lttng_condition *handle_condition_event(int *argc, const char ***argv) | |
1217 | { | |
20a01d15 | 1218 | struct parse_event_rule_res res; |
4624dad0 | 1219 | struct lttng_condition *c; |
20a01d15 | 1220 | size_t i; |
4624dad0 | 1221 | |
20a01d15 SM |
1222 | res = parse_event_rule(argc, argv); |
1223 | if (!res.er) { | |
4624dad0 | 1224 | c = NULL; |
20a01d15 | 1225 | goto error; |
4624dad0 SM |
1226 | } |
1227 | ||
8dbb86b8 | 1228 | c = lttng_condition_event_rule_matches_create(res.er); |
20a01d15 SM |
1229 | lttng_event_rule_destroy(res.er); |
1230 | res.er = NULL; | |
4624dad0 | 1231 | if (!c) { |
20a01d15 SM |
1232 | goto error; |
1233 | } | |
1234 | ||
1235 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&res.capture_descriptors); | |
1236 | i++) { | |
1237 | enum lttng_condition_status status; | |
1238 | struct lttng_event_expr **expr = | |
1239 | lttng_dynamic_array_get_element( | |
1240 | &res.capture_descriptors.array, i); | |
1241 | ||
1242 | assert(expr); | |
1243 | assert(*expr); | |
8dbb86b8 | 1244 | status = lttng_condition_event_rule_matches_append_capture_descriptor( |
20a01d15 SM |
1245 | c, *expr); |
1246 | if (status != LTTNG_CONDITION_STATUS_OK) { | |
81d566c9 JR |
1247 | if (status == LTTNG_CONDITION_STATUS_UNSUPPORTED) { |
1248 | ERR("The capture feature is unsupported by the event-rule condition type"); | |
1249 | } | |
1250 | ||
20a01d15 SM |
1251 | goto error; |
1252 | } | |
1253 | ||
1254 | /* Ownership of event expression moved to `c` */ | |
1255 | *expr = NULL; | |
4624dad0 SM |
1256 | } |
1257 | ||
20a01d15 SM |
1258 | goto end; |
1259 | ||
1260 | error: | |
1261 | lttng_condition_destroy(c); | |
1262 | c = NULL; | |
1263 | ||
4624dad0 | 1264 | end: |
20a01d15 SM |
1265 | lttng_dynamic_pointer_array_reset(&res.capture_descriptors); |
1266 | lttng_event_rule_destroy(res.er); | |
4624dad0 SM |
1267 | return c; |
1268 | } | |
1269 | ||
4624dad0 SM |
1270 | struct condition_descr { |
1271 | const char *name; | |
1272 | struct lttng_condition *(*handler) (int *argc, const char ***argv); | |
1273 | }; | |
1274 | ||
1275 | static const | |
1276 | struct condition_descr condition_descrs[] = { | |
665db063 | 1277 | { "event-rule-matches", handle_condition_event }, |
4624dad0 SM |
1278 | }; |
1279 | ||
1280 | static | |
29bcf415 SM |
1281 | struct lttng_condition *parse_condition(const char *condition_name, int *argc, |
1282 | const char ***argv) | |
4624dad0 SM |
1283 | { |
1284 | int i; | |
1285 | struct lttng_condition *cond; | |
4624dad0 SM |
1286 | const struct condition_descr *descr = NULL; |
1287 | ||
4624dad0 SM |
1288 | for (i = 0; i < ARRAY_SIZE(condition_descrs); i++) { |
1289 | if (strcmp(condition_name, condition_descrs[i].name) == 0) { | |
1290 | descr = &condition_descrs[i]; | |
1291 | break; | |
1292 | } | |
1293 | } | |
1294 | ||
1295 | if (!descr) { | |
1296 | ERR("Unknown condition name '%s'", condition_name); | |
1297 | goto error; | |
1298 | } | |
1299 | ||
1300 | cond = descr->handler(argc, argv); | |
1301 | if (!cond) { | |
1302 | /* The handler has already printed an error message. */ | |
1303 | goto error; | |
1304 | } | |
1305 | ||
1306 | goto end; | |
1307 | error: | |
1308 | cond = NULL; | |
1309 | end: | |
1310 | return cond; | |
1311 | } | |
bbadb5e0 JR |
1312 | |
1313 | static struct lttng_rate_policy *parse_rate_policy(const char *policy_str) | |
1314 | { | |
1315 | int num_token; | |
1316 | char **tokens = NULL; | |
1317 | struct lttng_rate_policy *policy = NULL; | |
1318 | enum lttng_rate_policy_type policy_type; | |
1319 | unsigned long long value; | |
1320 | char *policy_type_str; | |
1321 | char *policy_value_str; | |
1322 | ||
1323 | assert(policy_str); | |
1324 | ||
1325 | /* | |
1326 | * rate policy fields are separated by ':'. | |
1327 | */ | |
1328 | tokens = strutils_split(policy_str, ':', 1); | |
1329 | num_token = strutils_array_of_strings_len(tokens); | |
1330 | ||
1331 | /* | |
1332 | * Early sanity check that the number of parameter is exactly 2. | |
1333 | * i.e : type:value | |
1334 | */ | |
1335 | if (num_token != 2) { | |
1336 | ERR("Rate policy format is invalid."); | |
1337 | goto end; | |
1338 | } | |
1339 | ||
1340 | policy_type_str = tokens[0]; | |
1341 | policy_value_str = tokens[1]; | |
1342 | ||
1343 | /* Parse the type. */ | |
1344 | if (strcmp(policy_type_str, "once-after") == 0) { | |
1345 | policy_type = LTTNG_RATE_POLICY_TYPE_ONCE_AFTER_N; | |
1346 | } else if (strcmp(policy_type_str, "every") == 0) { | |
1347 | policy_type = LTTNG_RATE_POLICY_TYPE_EVERY_N; | |
1348 | } else { | |
1349 | ERR("Rate policy type `%s` unknown.", policy_type_str); | |
1350 | goto end; | |
1351 | } | |
1352 | ||
1353 | /* Parse the value. */ | |
1354 | if (utils_parse_unsigned_long_long(policy_value_str, &value) != 0) { | |
1355 | ERR("Failed to parse rate policy value `%s` as an integer.", | |
1356 | policy_value_str); | |
1357 | goto end; | |
1358 | } | |
1359 | ||
1360 | if (value == 0) { | |
1361 | ERR("Rate policy value `%s` must be > 0.", policy_value_str); | |
1362 | goto end; | |
1363 | } | |
1364 | ||
1365 | switch (policy_type) { | |
1366 | case LTTNG_RATE_POLICY_TYPE_EVERY_N: | |
1367 | policy = lttng_rate_policy_every_n_create(value); | |
1368 | break; | |
1369 | case LTTNG_RATE_POLICY_TYPE_ONCE_AFTER_N: | |
1370 | policy = lttng_rate_policy_once_after_n_create(value); | |
1371 | break; | |
1372 | default: | |
1373 | abort(); | |
1374 | } | |
1375 | ||
1376 | if (policy == NULL) { | |
1377 | ERR("Failed to create rate policy `%s`.", policy_str); | |
1378 | } | |
1379 | ||
1380 | end: | |
1381 | strutils_free_null_terminated_array_of_strings(tokens); | |
1382 | return policy; | |
1383 | } | |
1384 | ||
e45dd625 | 1385 | static const struct argpar_opt_descr notify_action_opt_descrs[] = { |
bbadb5e0 | 1386 | { OPT_RATE_POLICY, '\0', "rate-policy", true }, |
e45dd625 JR |
1387 | ARGPAR_OPT_DESCR_SENTINEL |
1388 | }; | |
4624dad0 | 1389 | |
4624dad0 SM |
1390 | static |
1391 | struct lttng_action *handle_action_notify(int *argc, const char ***argv) | |
1392 | { | |
e45dd625 JR |
1393 | struct lttng_action *action = NULL; |
1394 | struct argpar_state *state = NULL; | |
1395 | struct argpar_item *item = NULL; | |
1396 | char *error = NULL; | |
7f4d5b07 | 1397 | struct lttng_rate_policy *policy = NULL; |
4624dad0 | 1398 | |
e45dd625 JR |
1399 | state = argpar_state_create(*argc, *argv, notify_action_opt_descrs); |
1400 | if (!state) { | |
1401 | ERR("Failed to allocate an argpar state."); | |
1402 | goto error; | |
1403 | } | |
1404 | ||
1405 | while (true) { | |
1406 | enum argpar_state_parse_next_status status; | |
1407 | ||
1408 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
1409 | status = argpar_state_parse_next(state, &item, &error); | |
1410 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1411 | ERR("%s", error); | |
1412 | goto error; | |
1413 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
1414 | /* Just stop parsing here. */ | |
1415 | break; | |
1416 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1417 | break; | |
1418 | } | |
1419 | ||
1420 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
1421 | ||
1422 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
1423 | const struct argpar_item_opt *item_opt = | |
1424 | (const struct argpar_item_opt *) item; | |
1425 | ||
1426 | switch (item_opt->descr->id) { | |
bbadb5e0 | 1427 | case OPT_RATE_POLICY: |
e45dd625 | 1428 | { |
bbadb5e0 JR |
1429 | policy = parse_rate_policy(item_opt->arg); |
1430 | if (!policy) { | |
e45dd625 JR |
1431 | goto error; |
1432 | } | |
e45dd625 JR |
1433 | break; |
1434 | } | |
e45dd625 JR |
1435 | default: |
1436 | abort(); | |
1437 | } | |
1438 | } else { | |
1439 | const struct argpar_item_non_opt *item_non_opt; | |
1440 | ||
1441 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); | |
1442 | ||
1443 | item_non_opt = (const struct argpar_item_non_opt *) item; | |
1444 | ||
1445 | switch (item_non_opt->non_opt_index) { | |
1446 | default: | |
1447 | ERR("Unexpected argument `%s`.", | |
1448 | item_non_opt->arg); | |
1449 | goto error; | |
1450 | } | |
1451 | } | |
1452 | } | |
1453 | ||
1454 | *argc -= argpar_state_get_ingested_orig_args(state); | |
1455 | *argv += argpar_state_get_ingested_orig_args(state); | |
1456 | ||
e45dd625 JR |
1457 | action = lttng_action_notify_create(); |
1458 | if (!action) { | |
1459 | ERR("Failed to create notify action"); | |
1460 | goto error; | |
1461 | } | |
1462 | ||
1463 | if (policy) { | |
1464 | enum lttng_action_status status; | |
7f4d5b07 | 1465 | status = lttng_action_notify_set_rate_policy(action, policy); |
e45dd625 | 1466 | if (status != LTTNG_ACTION_STATUS_OK) { |
7f4d5b07 | 1467 | ERR("Failed to set rate policy"); |
e45dd625 JR |
1468 | goto error; |
1469 | } | |
1470 | } | |
1471 | ||
1472 | goto end; | |
1473 | ||
1474 | error: | |
1475 | lttng_action_destroy(action); | |
1476 | action = NULL; | |
e45dd625 | 1477 | end: |
55c6294d | 1478 | free(error); |
7f4d5b07 | 1479 | lttng_rate_policy_destroy(policy); |
e45dd625 JR |
1480 | argpar_state_destroy(state); |
1481 | argpar_item_destroy(item); | |
1482 | return action; | |
1483 | } | |
4624dad0 SM |
1484 | |
1485 | /* | |
e45dd625 | 1486 | * Generic handler for a kind of action that takes a session name and an |
7f4d5b07 | 1487 | * optional rate policy. |
4624dad0 SM |
1488 | */ |
1489 | ||
e45dd625 JR |
1490 | static struct lttng_action *handle_action_simple_session_with_policy(int *argc, |
1491 | const char ***argv, | |
4624dad0 | 1492 | struct lttng_action *(*create_action_cb)(void), |
e45dd625 JR |
1493 | enum lttng_action_status (*set_session_name_cb)( |
1494 | struct lttng_action *, const char *), | |
7f4d5b07 | 1495 | enum lttng_action_status (*set_rate_policy_cb)( |
e45dd625 | 1496 | struct lttng_action *, |
7f4d5b07 | 1497 | const struct lttng_rate_policy *), |
4624dad0 SM |
1498 | const char *action_name) |
1499 | { | |
1500 | struct lttng_action *action = NULL; | |
1501 | struct argpar_state *state = NULL; | |
1502 | struct argpar_item *item = NULL; | |
1503 | const char *session_name_arg = NULL; | |
1504 | char *error = NULL; | |
1505 | enum lttng_action_status action_status; | |
7f4d5b07 | 1506 | struct lttng_rate_policy *policy = NULL; |
e45dd625 JR |
1507 | |
1508 | assert(set_session_name_cb); | |
7f4d5b07 | 1509 | assert(set_rate_policy_cb); |
e45dd625 | 1510 | |
7f4d5b07 | 1511 | const struct argpar_opt_descr rate_policy_opt_descrs[] = { |
bbadb5e0 | 1512 | { OPT_RATE_POLICY, '\0', "rate-policy", true }, |
e45dd625 JR |
1513 | ARGPAR_OPT_DESCR_SENTINEL |
1514 | }; | |
b03a81fb | 1515 | |
7f4d5b07 | 1516 | state = argpar_state_create(*argc, *argv, rate_policy_opt_descrs); |
4624dad0 SM |
1517 | if (!state) { |
1518 | ERR("Failed to allocate an argpar state."); | |
1519 | goto error; | |
1520 | } | |
1521 | ||
1522 | while (true) { | |
1523 | enum argpar_state_parse_next_status status; | |
4624dad0 SM |
1524 | |
1525 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
1526 | status = argpar_state_parse_next(state, &item, &error); | |
1527 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1528 | ERR("%s", error); | |
1529 | goto error; | |
e45dd625 JR |
1530 | } else if (status == |
1531 | ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
4624dad0 SM |
1532 | /* Just stop parsing here. */ |
1533 | break; | |
1534 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1535 | break; | |
1536 | } | |
1537 | ||
1538 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
e45dd625 JR |
1539 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { |
1540 | const struct argpar_item_opt *item_opt = | |
1541 | (const struct argpar_item_opt *) item; | |
4624dad0 | 1542 | |
e45dd625 | 1543 | switch (item_opt->descr->id) { |
bbadb5e0 | 1544 | case OPT_RATE_POLICY: |
e45dd625 | 1545 | { |
bbadb5e0 JR |
1546 | policy = parse_rate_policy(item_opt->arg); |
1547 | if (!policy) { | |
e45dd625 JR |
1548 | goto error; |
1549 | } | |
e45dd625 JR |
1550 | break; |
1551 | } | |
e45dd625 JR |
1552 | default: |
1553 | abort(); | |
1554 | } | |
1555 | } else { | |
1556 | const struct argpar_item_non_opt *item_non_opt; | |
1557 | item_non_opt = (const struct argpar_item_non_opt *) item; | |
1558 | ||
1559 | switch (item_non_opt->non_opt_index) { | |
1560 | case 0: | |
1561 | session_name_arg = item_non_opt->arg; | |
1562 | break; | |
1563 | default: | |
1564 | ERR("Unexpected argument `%s`.", | |
1565 | item_non_opt->arg); | |
1566 | goto error; | |
1567 | } | |
4624dad0 SM |
1568 | } |
1569 | } | |
1570 | ||
1571 | *argc -= argpar_state_get_ingested_orig_args(state); | |
1572 | *argv += argpar_state_get_ingested_orig_args(state); | |
1573 | ||
1574 | if (!session_name_arg) { | |
1575 | ERR("Missing session name."); | |
1576 | goto error; | |
1577 | } | |
1578 | ||
1579 | action = create_action_cb(); | |
1580 | if (!action) { | |
1581 | ERR("Failed to allocate %s session action.", action_name); | |
1582 | goto error; | |
1583 | } | |
1584 | ||
1585 | action_status = set_session_name_cb(action, session_name_arg); | |
1586 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
1587 | ERR("Failed to set action %s session's session name to '%s'.", | |
1588 | action_name, session_name_arg); | |
1589 | goto error; | |
1590 | } | |
1591 | ||
e45dd625 | 1592 | if (policy) { |
7f4d5b07 | 1593 | action_status = set_rate_policy_cb(action, policy); |
e45dd625 | 1594 | if (action_status != LTTNG_ACTION_STATUS_OK) { |
7f4d5b07 | 1595 | ERR("Failed to set rate policy"); |
e45dd625 JR |
1596 | goto error; |
1597 | } | |
1598 | } | |
1599 | ||
4624dad0 SM |
1600 | goto end; |
1601 | ||
1602 | error: | |
1603 | lttng_action_destroy(action); | |
1604 | action = NULL; | |
97abbc84 | 1605 | argpar_item_destroy(item); |
4624dad0 | 1606 | end: |
7f4d5b07 | 1607 | lttng_rate_policy_destroy(policy); |
cb1b81ea | 1608 | free(error); |
b78ef509 | 1609 | argpar_state_destroy(state); |
4624dad0 SM |
1610 | return action; |
1611 | } | |
1612 | ||
1613 | static | |
1614 | struct lttng_action *handle_action_start_session(int *argc, | |
1615 | const char ***argv) | |
1616 | { | |
e45dd625 JR |
1617 | return handle_action_simple_session_with_policy(argc, argv, |
1618 | lttng_action_start_session_create, | |
1619 | lttng_action_start_session_set_session_name, | |
7f4d5b07 | 1620 | lttng_action_start_session_set_rate_policy, "start"); |
4624dad0 SM |
1621 | } |
1622 | ||
1623 | static | |
1624 | struct lttng_action *handle_action_stop_session(int *argc, | |
1625 | const char ***argv) | |
1626 | { | |
e45dd625 JR |
1627 | return handle_action_simple_session_with_policy(argc, argv, |
1628 | lttng_action_stop_session_create, | |
1629 | lttng_action_stop_session_set_session_name, | |
7f4d5b07 | 1630 | lttng_action_stop_session_set_rate_policy, "stop"); |
4624dad0 SM |
1631 | } |
1632 | ||
1633 | static | |
1634 | struct lttng_action *handle_action_rotate_session(int *argc, | |
1635 | const char ***argv) | |
1636 | { | |
e45dd625 | 1637 | return handle_action_simple_session_with_policy(argc, argv, |
4624dad0 SM |
1638 | lttng_action_rotate_session_create, |
1639 | lttng_action_rotate_session_set_session_name, | |
7f4d5b07 | 1640 | lttng_action_rotate_session_set_rate_policy, |
4624dad0 SM |
1641 | "rotate"); |
1642 | } | |
1643 | ||
1644 | static const struct argpar_opt_descr snapshot_action_opt_descrs[] = { | |
1645 | { OPT_NAME, 'n', "name", true }, | |
1646 | { OPT_MAX_SIZE, 'm', "max-size", true }, | |
1647 | { OPT_CTRL_URL, '\0', "ctrl-url", true }, | |
1648 | { OPT_DATA_URL, '\0', "data-url", true }, | |
1649 | { OPT_URL, '\0', "url", true }, | |
1650 | { OPT_PATH, '\0', "path", true }, | |
bbadb5e0 | 1651 | { OPT_RATE_POLICY, '\0', "rate-policy", true }, |
4624dad0 SM |
1652 | ARGPAR_OPT_DESCR_SENTINEL |
1653 | }; | |
1654 | ||
1655 | static | |
1656 | struct lttng_action *handle_action_snapshot_session(int *argc, | |
1657 | const char ***argv) | |
1658 | { | |
1659 | struct lttng_action *action = NULL; | |
1660 | struct argpar_state *state = NULL; | |
1661 | struct argpar_item *item = NULL; | |
1662 | const char *session_name_arg = NULL; | |
1663 | char *snapshot_name_arg = NULL; | |
1664 | char *ctrl_url_arg = NULL; | |
1665 | char *data_url_arg = NULL; | |
1666 | char *max_size_arg = NULL; | |
1667 | char *url_arg = NULL; | |
1668 | char *path_arg = NULL; | |
1669 | char *error = NULL; | |
1670 | enum lttng_action_status action_status; | |
1671 | struct lttng_snapshot_output *snapshot_output = NULL; | |
7f4d5b07 | 1672 | struct lttng_rate_policy *policy = NULL; |
4624dad0 SM |
1673 | int ret; |
1674 | unsigned int locations_specified = 0; | |
1675 | ||
1676 | state = argpar_state_create(*argc, *argv, snapshot_action_opt_descrs); | |
1677 | if (!state) { | |
1678 | ERR("Failed to allocate an argpar state."); | |
1679 | goto error; | |
1680 | } | |
1681 | ||
1682 | while (true) { | |
1683 | enum argpar_state_parse_next_status status; | |
1684 | ||
1685 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
1686 | status = argpar_state_parse_next(state, &item, &error); | |
1687 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1688 | ERR("%s", error); | |
1689 | goto error; | |
1690 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
1691 | /* Just stop parsing here. */ | |
1692 | break; | |
1693 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1694 | break; | |
1695 | } | |
1696 | ||
1697 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
1698 | ||
1699 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
1700 | const struct argpar_item_opt *item_opt = | |
1701 | (const struct argpar_item_opt *) item; | |
1702 | ||
1703 | switch (item_opt->descr->id) { | |
1704 | case OPT_NAME: | |
1705 | if (!assign_string(&snapshot_name_arg, item_opt->arg, "--name/-n")) { | |
1706 | goto error; | |
1707 | } | |
1708 | ||
1709 | break; | |
1710 | case OPT_MAX_SIZE: | |
1711 | if (!assign_string(&max_size_arg, item_opt->arg, "--max-size/-m")) { | |
1712 | goto error; | |
1713 | } | |
1714 | ||
1715 | break; | |
1716 | case OPT_CTRL_URL: | |
1717 | if (!assign_string(&ctrl_url_arg, item_opt->arg, "--ctrl-url")) { | |
1718 | goto error; | |
1719 | } | |
1720 | ||
1721 | break; | |
1722 | case OPT_DATA_URL: | |
1723 | if (!assign_string(&data_url_arg, item_opt->arg, "--data-url")) { | |
1724 | goto error; | |
1725 | } | |
1726 | ||
1727 | break; | |
1728 | case OPT_URL: | |
1729 | if (!assign_string(&url_arg, item_opt->arg, "--url")) { | |
1730 | goto error; | |
1731 | } | |
1732 | ||
1733 | break; | |
1734 | case OPT_PATH: | |
1735 | if (!assign_string(&path_arg, item_opt->arg, "--path")) { | |
1736 | goto error; | |
1737 | } | |
1738 | ||
1739 | break; | |
bbadb5e0 | 1740 | case OPT_RATE_POLICY: |
e45dd625 | 1741 | { |
bbadb5e0 JR |
1742 | policy = parse_rate_policy(item_opt->arg); |
1743 | if (!policy) { | |
e45dd625 JR |
1744 | goto error; |
1745 | } | |
e45dd625 JR |
1746 | break; |
1747 | } | |
4624dad0 SM |
1748 | default: |
1749 | abort(); | |
1750 | } | |
1751 | } else { | |
1752 | const struct argpar_item_non_opt *item_non_opt; | |
1753 | ||
1754 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); | |
1755 | ||
1756 | item_non_opt = (const struct argpar_item_non_opt *) item; | |
1757 | ||
1758 | switch (item_non_opt->non_opt_index) { | |
1759 | case 0: | |
1760 | session_name_arg = item_non_opt->arg; | |
1761 | break; | |
1762 | default: | |
1763 | ERR("Unexpected argument `%s`.", | |
1764 | item_non_opt->arg); | |
1765 | goto error; | |
1766 | } | |
1767 | } | |
1768 | } | |
1769 | ||
1770 | *argc -= argpar_state_get_ingested_orig_args(state); | |
1771 | *argv += argpar_state_get_ingested_orig_args(state); | |
1772 | ||
1773 | if (!session_name_arg) { | |
1774 | ERR("Missing session name."); | |
1775 | goto error; | |
1776 | } | |
1777 | ||
1778 | /* --ctrl-url and --data-url must come in pair. */ | |
1779 | if (ctrl_url_arg && !data_url_arg) { | |
1780 | ERR("--ctrl-url is specified, but --data-url is missing."); | |
1781 | goto error; | |
1782 | } | |
1783 | ||
1784 | if (!ctrl_url_arg && data_url_arg) { | |
1785 | ERR("--data-url is specified, but --ctrl-url is missing."); | |
1786 | goto error; | |
1787 | } | |
1788 | ||
1789 | locations_specified += !!(ctrl_url_arg || data_url_arg); | |
1790 | locations_specified += !!url_arg; | |
1791 | locations_specified += !!path_arg; | |
1792 | ||
1793 | /* --ctrl-url/--data-url, --url and --path are mutually exclusive. */ | |
1794 | if (locations_specified > 1) { | |
1795 | ERR("The --ctrl-url/--data-url, --url, and --path options can't be used together."); | |
1796 | goto error; | |
1797 | } | |
1798 | ||
1799 | /* | |
1800 | * Did the user specify an option that implies using a | |
1801 | * custom/unregistered output? | |
1802 | */ | |
1803 | if (url_arg || ctrl_url_arg || path_arg) { | |
1804 | snapshot_output = lttng_snapshot_output_create(); | |
1805 | if (!snapshot_output) { | |
1806 | ERR("Failed to allocate a snapshot output."); | |
1807 | goto error; | |
1808 | } | |
1809 | } | |
1810 | ||
1811 | action = lttng_action_snapshot_session_create(); | |
1812 | if (!action) { | |
1813 | ERR("Failed to allocate snapshot session action."); | |
1814 | goto error; | |
1815 | } | |
1816 | ||
1817 | action_status = lttng_action_snapshot_session_set_session_name( | |
1818 | action, session_name_arg); | |
1819 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
1820 | ERR("Failed to set action snapshot session's session name to '%s'.", | |
1821 | session_name_arg); | |
1822 | goto error; | |
1823 | } | |
1824 | ||
1825 | if (snapshot_name_arg) { | |
1826 | if (!snapshot_output) { | |
1827 | ERR("Can't provide a snapshot output name without a snapshot output destination."); | |
1828 | goto error; | |
1829 | } | |
1830 | ||
1831 | ret = lttng_snapshot_output_set_name( | |
1832 | snapshot_name_arg, snapshot_output); | |
1833 | if (ret != 0) { | |
1834 | ERR("Failed to set name of snapshot output."); | |
1835 | goto error; | |
1836 | } | |
1837 | } | |
1838 | ||
1839 | if (max_size_arg) { | |
1840 | uint64_t max_size; | |
1841 | ||
1842 | if (!snapshot_output) { | |
1843 | ERR("Can't provide a snapshot output max size without a snapshot output destination."); | |
1844 | goto error; | |
1845 | } | |
1846 | ||
1847 | ret = utils_parse_size_suffix(max_size_arg, &max_size); | |
1848 | if (ret != 0) { | |
1849 | ERR("Failed to parse `%s` as a size.", max_size_arg); | |
1850 | goto error; | |
1851 | } | |
1852 | ||
1853 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1854 | if (ret != 0) { | |
1855 | ERR("Failed to set snapshot output's max size to %" PRIu64 " bytes.", | |
1856 | max_size); | |
1857 | goto error; | |
1858 | } | |
1859 | } | |
1860 | ||
1861 | if (url_arg) { | |
1862 | int num_uris; | |
1863 | struct lttng_uri *uris; | |
1864 | ||
1865 | if (!strstr(url_arg, "://")) { | |
1866 | ERR("Failed to parse '%s' as an URL.", url_arg); | |
1867 | goto error; | |
1868 | } | |
1869 | ||
1870 | num_uris = uri_parse_str_urls(url_arg, NULL, &uris); | |
1871 | if (num_uris < 1) { | |
1872 | ERR("Failed to parse '%s' as an URL.", url_arg); | |
1873 | goto error; | |
1874 | } | |
1875 | ||
1876 | if (uris[0].dtype == LTTNG_DST_PATH) { | |
1877 | ret = lttng_snapshot_output_set_local_path( | |
1878 | uris[0].dst.path, snapshot_output); | |
1879 | free(uris); | |
1880 | if (ret != 0) { | |
1881 | ERR("Failed to assign '%s' as a local destination.", | |
1882 | url_arg); | |
1883 | goto error; | |
1884 | } | |
1885 | } else { | |
1886 | ret = lttng_snapshot_output_set_network_url( | |
1887 | url_arg, snapshot_output); | |
1888 | free(uris); | |
1889 | if (ret != 0) { | |
1890 | ERR("Failed to assign '%s' as a network URL.", | |
1891 | url_arg); | |
1892 | goto error; | |
1893 | } | |
1894 | } | |
1895 | } | |
1896 | ||
1897 | if (path_arg) { | |
1898 | ret = lttng_snapshot_output_set_local_path( | |
1899 | path_arg, snapshot_output); | |
1900 | if (ret != 0) { | |
1901 | ERR("Failed to parse '%s' as a local path.", path_arg); | |
1902 | goto error; | |
1903 | } | |
1904 | } | |
1905 | ||
1906 | if (ctrl_url_arg) { | |
1907 | /* | |
1908 | * Two argument form, network output with separate control and | |
1909 | * data URLs. | |
1910 | */ | |
1911 | ret = lttng_snapshot_output_set_network_urls( | |
1912 | ctrl_url_arg, data_url_arg, snapshot_output); | |
1913 | if (ret != 0) { | |
1914 | ERR("Failed to parse `%s` and `%s` as control and data URLs.", | |
1915 | ctrl_url_arg, data_url_arg); | |
1916 | goto error; | |
1917 | } | |
1918 | } | |
1919 | ||
1920 | if (snapshot_output) { | |
1921 | action_status = lttng_action_snapshot_session_set_output( | |
1922 | action, snapshot_output); | |
1923 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
1924 | ERR("Failed to set snapshot session action's output."); | |
1925 | goto error; | |
1926 | } | |
1927 | ||
1928 | /* Ownership of `snapshot_output` has been transferred to the action. */ | |
1929 | snapshot_output = NULL; | |
1930 | } | |
1931 | ||
e45dd625 JR |
1932 | if (policy) { |
1933 | enum lttng_action_status status; | |
7f4d5b07 | 1934 | status = lttng_action_snapshot_session_set_rate_policy( |
e45dd625 JR |
1935 | action, policy); |
1936 | if (status != LTTNG_ACTION_STATUS_OK) { | |
7f4d5b07 | 1937 | ERR("Failed to set rate policy"); |
e45dd625 JR |
1938 | goto error; |
1939 | } | |
1940 | } | |
1941 | ||
4624dad0 SM |
1942 | goto end; |
1943 | ||
1944 | error: | |
1945 | lttng_action_destroy(action); | |
1946 | action = NULL; | |
1947 | free(error); | |
1948 | end: | |
1949 | free(snapshot_name_arg); | |
1950 | free(path_arg); | |
1951 | free(url_arg); | |
1952 | free(ctrl_url_arg); | |
1953 | free(data_url_arg); | |
1954 | free(snapshot_output); | |
f6b73530 | 1955 | free(max_size_arg); |
7f4d5b07 | 1956 | lttng_rate_policy_destroy(policy); |
4624dad0 | 1957 | argpar_state_destroy(state); |
97abbc84 | 1958 | argpar_item_destroy(item); |
4624dad0 SM |
1959 | return action; |
1960 | } | |
1961 | ||
1962 | struct action_descr { | |
1963 | const char *name; | |
1964 | struct lttng_action *(*handler) (int *argc, const char ***argv); | |
1965 | }; | |
1966 | ||
1967 | static const | |
1968 | struct action_descr action_descrs[] = { | |
1969 | { "notify", handle_action_notify }, | |
1970 | { "start-session", handle_action_start_session }, | |
1971 | { "stop-session", handle_action_stop_session }, | |
1972 | { "rotate-session", handle_action_rotate_session }, | |
1973 | { "snapshot-session", handle_action_snapshot_session }, | |
1974 | }; | |
1975 | ||
1976 | static | |
29bcf415 | 1977 | struct lttng_action *parse_action(const char *action_name, int *argc, const char ***argv) |
4624dad0 SM |
1978 | { |
1979 | int i; | |
1980 | struct lttng_action *action; | |
4624dad0 SM |
1981 | const struct action_descr *descr = NULL; |
1982 | ||
4624dad0 SM |
1983 | for (i = 0; i < ARRAY_SIZE(action_descrs); i++) { |
1984 | if (strcmp(action_name, action_descrs[i].name) == 0) { | |
1985 | descr = &action_descrs[i]; | |
1986 | break; | |
1987 | } | |
1988 | } | |
1989 | ||
1990 | if (!descr) { | |
1991 | ERR("Unknown action name: %s", action_name); | |
1992 | goto error; | |
1993 | } | |
1994 | ||
1995 | action = descr->handler(argc, argv); | |
1996 | if (!action) { | |
1997 | /* The handler has already printed an error message. */ | |
1998 | goto error; | |
1999 | } | |
2000 | ||
2001 | goto end; | |
2002 | error: | |
2003 | action = NULL; | |
2004 | end: | |
2005 | return action; | |
2006 | } | |
2007 | ||
2008 | static const | |
2009 | struct argpar_opt_descr add_trigger_options[] = { | |
2010 | { OPT_HELP, 'h', "help", false }, | |
2011 | { OPT_LIST_OPTIONS, '\0', "list-options", false }, | |
29bcf415 SM |
2012 | { OPT_CONDITION, '\0', "condition", true }, |
2013 | { OPT_ACTION, '\0', "action", true }, | |
1d4b59f2 | 2014 | { OPT_NAME, '\0', "name", true }, |
481c5310 | 2015 | { OPT_OWNER_UID, '\0', "owner-uid", true }, |
4624dad0 SM |
2016 | ARGPAR_OPT_DESCR_SENTINEL, |
2017 | }; | |
2018 | ||
2019 | static | |
2020 | void lttng_actions_destructor(void *p) | |
2021 | { | |
2022 | struct lttng_action *action = p; | |
2023 | ||
2024 | lttng_action_destroy(action); | |
2025 | } | |
2026 | ||
2027 | int cmd_add_trigger(int argc, const char **argv) | |
2028 | { | |
2029 | int ret; | |
2030 | int my_argc = argc - 1; | |
2031 | const char **my_argv = argv + 1; | |
2032 | struct lttng_condition *condition = NULL; | |
2033 | struct lttng_dynamic_pointer_array actions; | |
2034 | struct argpar_state *argpar_state = NULL; | |
2035 | struct argpar_item *argpar_item = NULL; | |
702f26c8 | 2036 | struct lttng_action *action_list = NULL; |
4624dad0 SM |
2037 | struct lttng_action *action = NULL; |
2038 | struct lttng_trigger *trigger = NULL; | |
2039 | char *error = NULL; | |
1d4b59f2 | 2040 | char *name = NULL; |
4624dad0 | 2041 | int i; |
481c5310 | 2042 | char *owner_uid = NULL; |
a5c2d2a7 | 2043 | enum lttng_error_code ret_code; |
4624dad0 SM |
2044 | |
2045 | lttng_dynamic_pointer_array_init(&actions, lttng_actions_destructor); | |
2046 | ||
2047 | while (true) { | |
2048 | enum argpar_state_parse_next_status status; | |
2049 | const struct argpar_item_opt *item_opt; | |
2050 | int ingested_args; | |
2051 | ||
2052 | argpar_state_destroy(argpar_state); | |
2053 | argpar_state = argpar_state_create(my_argc, my_argv, | |
2054 | add_trigger_options); | |
2055 | if (!argpar_state) { | |
2056 | ERR("Failed to create argpar state."); | |
2057 | goto error; | |
2058 | } | |
2059 | ||
2060 | ARGPAR_ITEM_DESTROY_AND_RESET(argpar_item); | |
2061 | status = argpar_state_parse_next(argpar_state, &argpar_item, &error); | |
2062 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
2063 | ERR("%s", error); | |
2064 | goto error; | |
2065 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
2066 | ERR("%s", error); | |
2067 | goto error; | |
2068 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
2069 | break; | |
2070 | } | |
2071 | ||
2072 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
2073 | ||
2074 | if (argpar_item->type == ARGPAR_ITEM_TYPE_NON_OPT) { | |
2075 | const struct argpar_item_non_opt *item_non_opt = | |
2076 | (const struct argpar_item_non_opt *) | |
2077 | argpar_item; | |
2078 | ||
2079 | ERR("Unexpected argument `%s`.", item_non_opt->arg); | |
2080 | goto error; | |
2081 | } | |
2082 | ||
2083 | item_opt = (const struct argpar_item_opt *) argpar_item; | |
2084 | ||
2085 | ingested_args = argpar_state_get_ingested_orig_args( | |
2086 | argpar_state); | |
2087 | ||
2088 | my_argc -= ingested_args; | |
2089 | my_argv += ingested_args; | |
2090 | ||
2091 | switch (item_opt->descr->id) { | |
2092 | case OPT_HELP: | |
2093 | SHOW_HELP(); | |
2094 | ret = 0; | |
2095 | goto end; | |
2096 | case OPT_LIST_OPTIONS: | |
2097 | list_cmd_options_argpar(stdout, add_trigger_options); | |
2098 | ret = 0; | |
2099 | goto end; | |
2100 | case OPT_CONDITION: | |
2101 | { | |
2102 | if (condition) { | |
2103 | ERR("A --condition was already given."); | |
2104 | goto error; | |
2105 | } | |
2106 | ||
29bcf415 | 2107 | condition = parse_condition(item_opt->arg, &my_argc, &my_argv); |
4624dad0 SM |
2108 | if (!condition) { |
2109 | /* | |
2110 | * An error message was already printed by | |
2111 | * parse_condition. | |
2112 | */ | |
2113 | goto error; | |
2114 | } | |
2115 | ||
2116 | break; | |
2117 | } | |
2118 | case OPT_ACTION: | |
2119 | { | |
29bcf415 | 2120 | action = parse_action(item_opt->arg, &my_argc, &my_argv); |
4624dad0 SM |
2121 | if (!action) { |
2122 | /* | |
2123 | * An error message was already printed by | |
2124 | * parse_condition. | |
2125 | */ | |
2126 | goto error; | |
2127 | } | |
2128 | ||
2129 | ret = lttng_dynamic_pointer_array_add_pointer( | |
2130 | &actions, action); | |
2131 | if (ret) { | |
2132 | ERR("Failed to add pointer to pointer array."); | |
2133 | goto error; | |
2134 | } | |
2135 | ||
2136 | /* Ownership of the action was transferred to the group. */ | |
2137 | action = NULL; | |
2138 | ||
2139 | break; | |
2140 | } | |
1d4b59f2 | 2141 | case OPT_NAME: |
4624dad0 | 2142 | { |
1d4b59f2 | 2143 | if (!assign_string(&name, item_opt->arg, "--name")) { |
4624dad0 SM |
2144 | goto error; |
2145 | } | |
2146 | ||
2147 | break; | |
2148 | } | |
481c5310 | 2149 | case OPT_OWNER_UID: |
4624dad0 | 2150 | { |
481c5310 SM |
2151 | if (!assign_string(&owner_uid, item_opt->arg, |
2152 | "--owner-uid")) { | |
4624dad0 SM |
2153 | goto error; |
2154 | } | |
2155 | ||
2156 | break; | |
2157 | } | |
2158 | default: | |
2159 | abort(); | |
2160 | } | |
2161 | } | |
2162 | ||
2163 | if (!condition) { | |
2164 | ERR("Missing --condition."); | |
2165 | goto error; | |
2166 | } | |
2167 | ||
2168 | if (lttng_dynamic_pointer_array_get_count(&actions) == 0) { | |
2169 | ERR("Need at least one --action."); | |
2170 | goto error; | |
2171 | } | |
2172 | ||
702f26c8 JR |
2173 | action_list = lttng_action_list_create(); |
2174 | if (!action_list) { | |
4624dad0 SM |
2175 | goto error; |
2176 | } | |
2177 | ||
2178 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&actions); i++) { | |
2179 | enum lttng_action_status status; | |
2180 | ||
2181 | action = lttng_dynamic_pointer_array_steal_pointer(&actions, i); | |
2182 | ||
702f26c8 | 2183 | status = lttng_action_list_add_action(action_list, action); |
4624dad0 SM |
2184 | if (status != LTTNG_ACTION_STATUS_OK) { |
2185 | goto error; | |
2186 | } | |
2187 | ||
2188 | /* | |
702f26c8 | 2189 | * The `lttng_action_list_add_action()` takes a reference to |
4624dad0 SM |
2190 | * the action. We can destroy ours. |
2191 | */ | |
2192 | lttng_action_destroy(action); | |
2193 | action = NULL; | |
2194 | } | |
2195 | ||
702f26c8 | 2196 | trigger = lttng_trigger_create(condition, action_list); |
4624dad0 SM |
2197 | if (!trigger) { |
2198 | goto error; | |
2199 | } | |
2200 | ||
481c5310 | 2201 | if (owner_uid) { |
4624dad0 SM |
2202 | enum lttng_trigger_status trigger_status; |
2203 | char *end; | |
2204 | long long uid; | |
2205 | ||
2206 | errno = 0; | |
481c5310 SM |
2207 | uid = strtol(owner_uid, &end, 10); |
2208 | if (end == owner_uid || *end != '\0' || errno != 0) { | |
2209 | ERR("Failed to parse `%s` as a user id.", owner_uid); | |
4624dad0 SM |
2210 | } |
2211 | ||
2212 | trigger_status = lttng_trigger_set_owner_uid(trigger, uid); | |
2213 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
2214 | ERR("Failed to set trigger's user identity."); | |
2215 | goto error; | |
2216 | } | |
2217 | } | |
2218 | ||
a5c2d2a7 JG |
2219 | if (name) { |
2220 | ret_code = lttng_register_trigger_with_name(trigger, name); | |
2221 | } else { | |
2222 | ret_code = lttng_register_trigger_with_automatic_name(trigger); | |
2223 | } | |
2224 | ||
2225 | if (ret_code != LTTNG_OK) { | |
2226 | ERR("Failed to register trigger: %s.", | |
2227 | lttng_strerror(-ret_code)); | |
4624dad0 SM |
2228 | goto error; |
2229 | } | |
2230 | ||
2231 | MSG("Trigger registered successfully."); | |
a5c2d2a7 | 2232 | ret = 0; |
4624dad0 SM |
2233 | |
2234 | goto end; | |
2235 | ||
2236 | error: | |
2237 | ret = 1; | |
2238 | ||
2239 | end: | |
2240 | argpar_state_destroy(argpar_state); | |
2241 | argpar_item_destroy(argpar_item); | |
2242 | lttng_dynamic_pointer_array_reset(&actions); | |
2243 | lttng_condition_destroy(condition); | |
702f26c8 | 2244 | lttng_action_destroy(action_list); |
4624dad0 SM |
2245 | lttng_action_destroy(action); |
2246 | lttng_trigger_destroy(trigger); | |
2247 | free(error); | |
1d4b59f2 | 2248 | free(name); |
481c5310 | 2249 | free(owner_uid); |
4624dad0 SM |
2250 | return ret; |
2251 | } |