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