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d3a684ee JR |
1 | #include <stdio.h> |
2 | ||
3 | #include "../command.h" | |
4 | #include "../uprobe.h" | |
5 | ||
6 | #include "common/argpar/argpar.h" | |
7 | #include "common/dynamic-array.h" | |
8 | #include "common/string-utils/string-utils.h" | |
9 | #include "common/utils.h" | |
10 | #include "lttng/condition/event-rule.h" | |
11 | #include "lttng/event-internal.h" | |
12 | #include <lttng/event-rule/event-rule-internal.h> | |
13 | #include "lttng/event-rule/kprobe.h" | |
14 | #include "lttng/event-rule/syscall.h" | |
15 | #include <lttng/event-rule/tracepoint.h> | |
16 | #include "lttng/event-rule/uprobe.h" | |
17 | ||
18 | #ifdef LTTNG_EMBED_HELP | |
19 | static const char help_msg[] = | |
20 | #include <lttng-add-trigger.1.h> | |
21 | ; | |
22 | #endif | |
23 | ||
24 | enum { | |
25 | OPT_HELP, | |
26 | OPT_LIST_OPTIONS, | |
27 | ||
28 | OPT_CONDITION, | |
29 | OPT_ACTION, | |
30 | OPT_ID, | |
31 | OPT_FIRE_ONCE_AFTER, | |
32 | OPT_FIRE_EVERY, | |
33 | ||
34 | OPT_ALL, | |
35 | OPT_FILTER, | |
36 | OPT_EXCLUDE, | |
37 | OPT_LOGLEVEL, | |
38 | OPT_LOGLEVEL_ONLY, | |
39 | ||
40 | OPT_USERSPACE, | |
41 | OPT_KERNEL, | |
42 | OPT_LOG4J, | |
43 | OPT_JUL, | |
44 | OPT_PYTHON, | |
45 | ||
46 | OPT_FUNCTION, | |
47 | OPT_PROBE, | |
48 | OPT_USERSPACE_PROBE, | |
49 | OPT_SYSCALL, | |
50 | OPT_TRACEPOINT, | |
51 | ||
52 | OPT_NAME, | |
53 | OPT_MAX_SIZE, | |
54 | OPT_DATA_URL, | |
55 | OPT_CTRL_URL, | |
56 | }; | |
57 | ||
58 | static const struct argpar_opt_descr event_rule_opt_descrs[] = { | |
59 | { OPT_ALL, 'a', "all", false }, | |
60 | { OPT_FILTER, 'f', "filter", true }, | |
61 | { OPT_EXCLUDE, 'x', "exclude", true }, | |
62 | { OPT_LOGLEVEL, '\0', "loglevel", true }, | |
63 | { OPT_LOGLEVEL_ONLY, '\0', "loglevel-only", true }, | |
64 | ||
65 | /* Domains */ | |
66 | { OPT_USERSPACE, 'u', "userspace", false }, | |
67 | { OPT_KERNEL, 'k', "kernel", false }, | |
68 | { OPT_LOG4J, 'l', "log4j", false }, | |
69 | { OPT_JUL, 'j', "jul", false }, | |
70 | { OPT_PYTHON, 'p', "python", false }, | |
71 | ||
72 | /* Event rule types */ | |
73 | { OPT_FUNCTION, '\0', "function", true }, | |
74 | { OPT_PROBE, '\0', "probe", true }, | |
75 | { OPT_USERSPACE_PROBE, '\0', "userspace-probe", true }, | |
76 | { OPT_SYSCALL, '\0', "syscall" }, | |
77 | { OPT_TRACEPOINT, '\0', "tracepoint" }, | |
78 | ||
79 | ARGPAR_OPT_DESCR_SENTINEL | |
80 | }; | |
81 | ||
82 | static | |
83 | bool assign_domain_type(enum lttng_domain_type *dest, | |
84 | enum lttng_domain_type src) | |
85 | { | |
86 | bool ret; | |
87 | ||
88 | if (*dest == LTTNG_DOMAIN_NONE || *dest == src) { | |
89 | *dest = src; | |
90 | ret = true; | |
91 | } else { | |
92 | fprintf(stderr, "Error: Multiple domains specified.\n"); | |
93 | ret = false; | |
94 | } | |
95 | ||
96 | return ret; | |
97 | } | |
98 | ||
99 | static | |
100 | bool assign_event_rule_type(enum lttng_event_rule_type *dest, | |
101 | enum lttng_event_rule_type src) | |
102 | { | |
103 | bool ret; | |
104 | ||
105 | if (*dest == LTTNG_EVENT_RULE_TYPE_UNKNOWN || *dest == src) { | |
106 | *dest = src; | |
107 | ret = true; | |
108 | } else { | |
109 | fprintf(stderr, "Error: Multiple event type not supported.\n"); | |
110 | ret = false; | |
111 | } | |
112 | ||
113 | return ret; | |
114 | } | |
115 | ||
116 | static | |
117 | bool assign_string(char **dest, const char *src, const char *opt_name) | |
118 | { | |
119 | bool ret; | |
120 | ||
121 | if (*dest) { | |
122 | fprintf(stderr, | |
123 | "Duplicate %s given.\n", opt_name); | |
124 | goto error; | |
125 | } | |
126 | ||
127 | *dest = strdup(src); | |
128 | if (!*dest) { | |
129 | fprintf(stderr, "Failed to allocate %s string.\n", opt_name); | |
130 | goto error; | |
131 | } | |
132 | ||
133 | ret = true; | |
134 | goto end; | |
135 | ||
136 | error: | |
137 | ret = false; | |
138 | ||
139 | end: | |
140 | return ret; | |
141 | } | |
142 | ||
143 | /* This is defined in enable_events.c. */ | |
144 | LTTNG_HIDDEN | |
145 | int create_exclusion_list_and_validate(const char *event_name, | |
146 | const char *exclusions_arg, | |
147 | char ***exclusion_list); | |
148 | ||
149 | /* | |
150 | * Parse `str` as a log level in domain `domain_type`. Return -1 if the string | |
151 | * is not recognized as a valid log level. | |
152 | */ | |
153 | static | |
154 | int parse_loglevel_string(const char *str, enum lttng_domain_type domain_type) | |
155 | { | |
156 | ||
157 | switch (domain_type) { | |
158 | case LTTNG_DOMAIN_UST: | |
159 | return loglevel_str_to_value(str); | |
160 | ||
161 | case LTTNG_DOMAIN_LOG4J: | |
162 | return loglevel_log4j_str_to_value(str); | |
163 | ||
164 | case LTTNG_DOMAIN_JUL: | |
165 | return loglevel_jul_str_to_value(str); | |
166 | ||
167 | case LTTNG_DOMAIN_PYTHON: | |
168 | return loglevel_python_str_to_value(str); | |
169 | ||
170 | default: | |
171 | /* Invalid domain type. */ | |
172 | abort(); | |
173 | } | |
174 | } | |
175 | ||
176 | static | |
177 | struct lttng_event_rule *parse_event_rule(int *argc, const char ***argv) | |
178 | { | |
179 | struct lttng_event_rule *er = NULL; | |
180 | enum lttng_domain_type domain_type = LTTNG_DOMAIN_NONE; | |
181 | enum lttng_event_rule_type event_rule_type = LTTNG_EVENT_RULE_TYPE_UNKNOWN; | |
182 | struct argpar_state *state; | |
183 | struct argpar_item *item = NULL; | |
184 | char *error = NULL; | |
185 | int consumed_args = -1; | |
186 | struct lttng_userspace_probe_location *userspace_probe_location = NULL; | |
187 | ||
188 | /* Was the -a/--all flag provided? */ | |
189 | bool all_events = false; | |
190 | ||
191 | /* Tracepoint name (non-option argument) */ | |
192 | const char *tracepoint_name = NULL; | |
193 | ||
194 | /* Holds the argument of --probe / --userspace-probe. */ | |
195 | char *source = NULL; | |
196 | ||
197 | /* Filter */ | |
198 | char *filter = NULL; | |
199 | ||
200 | /* Exclude */ | |
201 | char *exclude = NULL; | |
202 | char **exclusion_list = NULL; | |
203 | ||
204 | /* Log level */ | |
205 | char *loglevel_str = NULL; | |
206 | bool loglevel_only = false; | |
207 | ||
208 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); | |
209 | if (!state) { | |
210 | fprintf(stderr, "Failed to allocate an argpar state.\n"); | |
211 | goto error; | |
212 | } | |
213 | ||
214 | while (true) { | |
215 | enum argpar_state_parse_next_status status; | |
216 | ||
217 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
218 | status = argpar_state_parse_next(state, &item, &error); | |
219 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
220 | fprintf(stderr, "Error: %s\n", error); | |
221 | goto error; | |
222 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
223 | /* Just stop parsing here. */ | |
224 | break; | |
225 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
226 | break; | |
227 | } | |
228 | ||
229 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
230 | ||
231 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
232 | struct argpar_item_opt *item_opt = | |
233 | (struct argpar_item_opt *) item; | |
234 | ||
235 | switch (item_opt->descr->id) { | |
236 | /* Domains */ | |
237 | case OPT_USERSPACE: | |
238 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_UST)) { | |
239 | goto error; | |
240 | } | |
241 | break; | |
242 | ||
243 | case OPT_KERNEL: | |
244 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_KERNEL)) { | |
245 | goto error; | |
246 | } | |
247 | break; | |
248 | ||
249 | case OPT_LOG4J: | |
250 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_LOG4J)) { | |
251 | goto error; | |
252 | } | |
253 | break; | |
254 | ||
255 | case OPT_JUL: | |
256 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_JUL)) { | |
257 | goto error; | |
258 | } | |
259 | break; | |
260 | ||
261 | case OPT_PYTHON: | |
262 | if (!assign_domain_type(&domain_type, LTTNG_DOMAIN_PYTHON)) { | |
263 | goto error; | |
264 | } | |
265 | break; | |
266 | ||
267 | /* Event rule types */ | |
268 | case OPT_FUNCTION: | |
269 | if (!assign_event_rule_type(&event_rule_type, | |
270 | LTTNG_EVENT_RULE_TYPE_KRETPROBE)) { | |
271 | goto error; | |
272 | } | |
273 | break; | |
274 | ||
275 | case OPT_PROBE: | |
276 | if (!assign_event_rule_type(&event_rule_type, | |
277 | LTTNG_EVENT_RULE_TYPE_KPROBE)) { | |
278 | goto error; | |
279 | } | |
280 | ||
281 | if (!assign_string(&source, item_opt->arg, "source")) { | |
282 | goto error; | |
283 | } | |
284 | ||
285 | break; | |
286 | ||
287 | case OPT_USERSPACE_PROBE: | |
288 | if (!assign_event_rule_type(&event_rule_type, | |
289 | LTTNG_EVENT_RULE_TYPE_UPROBE)) { | |
290 | goto error; | |
291 | } | |
292 | ||
293 | if (!assign_string(&source, item_opt->arg, "source")) { | |
294 | goto error; | |
295 | } | |
296 | break; | |
297 | ||
298 | case OPT_SYSCALL: | |
299 | if (!assign_event_rule_type(&event_rule_type, | |
300 | LTTNG_EVENT_RULE_TYPE_SYSCALL)) { | |
301 | goto error; | |
302 | } | |
303 | break; | |
304 | ||
305 | case OPT_TRACEPOINT: | |
306 | if (!assign_event_rule_type(&event_rule_type, | |
307 | LTTNG_EVENT_RULE_TYPE_TRACEPOINT)) { | |
308 | goto error; | |
309 | } | |
310 | break; | |
311 | ||
312 | case OPT_ALL: | |
313 | all_events = true; | |
314 | break; | |
315 | ||
316 | case OPT_FILTER: | |
317 | if (!assign_string(&filter, item_opt->arg, "--filter/-f")) { | |
318 | goto error; | |
319 | } | |
320 | break; | |
321 | ||
322 | case OPT_EXCLUDE: | |
323 | if (!assign_string(&exclude, item_opt->arg, "--exclude/-x")) { | |
324 | goto error; | |
325 | } | |
326 | break; | |
327 | ||
328 | case OPT_LOGLEVEL: | |
329 | case OPT_LOGLEVEL_ONLY: | |
330 | if (!assign_string(&loglevel_str, item_opt->arg, "--loglevel/--loglevel-only")) { | |
331 | goto error; | |
332 | } | |
333 | ||
334 | loglevel_only = item_opt->descr->id == OPT_LOGLEVEL_ONLY; | |
335 | break; | |
336 | ||
337 | default: | |
338 | abort(); | |
339 | } | |
340 | } else { | |
341 | struct argpar_item_non_opt *item_non_opt = | |
342 | (struct argpar_item_non_opt *) item; | |
343 | ||
344 | /* | |
345 | * Don't accept two non-option arguments/tracepoint | |
346 | * names. | |
347 | */ | |
348 | if (tracepoint_name) { | |
349 | fprintf(stderr, | |
350 | "Error: Unexpected argument: %s\n", | |
351 | item_non_opt->arg); | |
352 | goto error; | |
353 | } | |
354 | ||
355 | tracepoint_name = item_non_opt->arg; | |
356 | } | |
357 | } | |
358 | ||
359 | if (event_rule_type == LTTNG_EVENT_RULE_TYPE_UNKNOWN) { | |
360 | event_rule_type = LTTNG_EVENT_RULE_TYPE_TRACEPOINT; | |
361 | } | |
362 | ||
363 | /* | |
364 | * Option -a is applicable to event rules of type tracepoint and | |
365 | * syscall, and it is equivalent to using "*" as the tracepoint name. | |
366 | */ | |
367 | if (all_events) { | |
368 | switch (event_rule_type) { | |
369 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
370 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
371 | break; | |
372 | default: | |
373 | fprintf(stderr, "Error: Can't use -a/--all with event rule of type %s.\n", | |
374 | lttng_event_rule_type_str(event_rule_type)); | |
375 | goto error; | |
376 | } | |
377 | ||
378 | if (tracepoint_name) { | |
379 | fprintf(stderr, "Error: Can't provide a tracepoint name with -a/--all.\n"); | |
380 | goto error; | |
381 | } | |
382 | ||
383 | /* In which case, it's equivalent to tracepoint name "*". */ | |
384 | tracepoint_name = "*"; | |
385 | } | |
386 | ||
387 | /* | |
388 | * A tracepoint name (or -a, for the event rule types that accept it) | |
389 | * is required. | |
390 | */ | |
391 | if (!tracepoint_name) { | |
392 | fprintf(stderr, "Error: Need to provide either a tracepoint name or -a/--all.\n"); | |
393 | goto error; | |
394 | } | |
395 | ||
396 | /* | |
397 | * We don't support multiple tracepoint names for now. | |
398 | */ | |
399 | if (strchr(tracepoint_name, ',')) { | |
400 | fprintf(stderr, "Error: multiple tracepoint names are not supported at the moment.\n"); | |
401 | goto error; | |
402 | } | |
403 | ||
404 | /* | |
405 | * Update *argc and *argv so our caller can keep parsing what follows. | |
406 | */ | |
407 | consumed_args = argpar_state_get_ingested_orig_args(state); | |
408 | assert(consumed_args >= 0); | |
409 | *argc -= consumed_args; | |
410 | *argv += consumed_args; | |
411 | ||
412 | /* Need to specify a domain. */ | |
413 | if (domain_type == LTTNG_DOMAIN_NONE) { | |
414 | fprintf(stderr, "Error: Please specify a domain (-k/-u/-j).\n"); | |
415 | goto error; | |
416 | } | |
417 | ||
418 | /* Validate event rule type against domain. */ | |
419 | switch (event_rule_type) { | |
420 | case LTTNG_EVENT_RULE_TYPE_KPROBE: | |
421 | case LTTNG_EVENT_RULE_TYPE_KRETPROBE: | |
422 | case LTTNG_EVENT_RULE_TYPE_UPROBE: | |
423 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
424 | if (domain_type != LTTNG_DOMAIN_KERNEL) { | |
425 | fprintf(stderr, "Error: Event type not available for user-space tracing\n"); | |
426 | goto error; | |
427 | } | |
428 | break; | |
429 | ||
430 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
431 | break; | |
432 | ||
433 | default: | |
434 | abort(); | |
435 | } | |
436 | ||
437 | /* | |
438 | * Adding a filter to a probe, function or userspace-probe would be | |
439 | * denied by the kernel tracer as it's not supported at the moment. We | |
440 | * do an early check here to warn the user. | |
441 | */ | |
442 | if (filter && domain_type == LTTNG_DOMAIN_KERNEL) { | |
443 | switch (event_rule_type) { | |
444 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
445 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
446 | break; | |
447 | default: | |
448 | ERR("Filter expressions are not supported for %s events", | |
449 | lttng_event_rule_type_str(event_rule_type)); | |
450 | goto error; | |
451 | } | |
452 | } | |
453 | ||
454 | /* If --exclude/-x was passed, split it into an exclusion list. */ | |
455 | if (exclude) { | |
456 | if (domain_type != LTTNG_DOMAIN_UST) { | |
457 | fprintf(stderr, "Event name exclusions are not yet implemented for %s events", | |
458 | get_domain_str(domain_type)); | |
459 | goto error; | |
460 | } | |
461 | ||
462 | ||
463 | if (create_exclusion_list_and_validate(tracepoint_name, exclude, | |
464 | &exclusion_list) != 0) { | |
465 | fprintf(stderr, "Failed to create exclusion list.\n"); | |
466 | goto error; | |
467 | } | |
468 | } | |
469 | ||
470 | if (loglevel_str && event_rule_type != LTTNG_EVENT_RULE_TYPE_TRACEPOINT) { | |
471 | fprintf(stderr, "Log levels are only application to tracepoint event rules.\n"); | |
472 | goto error; | |
473 | } | |
474 | ||
475 | /* Finally, create the event rule object. */ | |
476 | switch (event_rule_type) { | |
477 | case LTTNG_EVENT_RULE_TYPE_TRACEPOINT: | |
478 | { | |
479 | enum lttng_event_rule_status event_rule_status; | |
480 | ||
481 | er = lttng_event_rule_tracepoint_create(domain_type); | |
482 | if (!er) { | |
483 | fprintf(stderr, "Failed to create tracepoint event rule.\n"); | |
484 | goto error; | |
485 | } | |
486 | ||
487 | /* Set pattern. */ | |
488 | event_rule_status = | |
489 | lttng_event_rule_tracepoint_set_pattern(er, tracepoint_name); | |
490 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
491 | fprintf(stderr, "Failed to set tracepoint pattern.\n"); | |
492 | goto error; | |
493 | } | |
494 | ||
495 | /* Set filter. */ | |
496 | if (filter) { | |
497 | event_rule_status = | |
498 | lttng_event_rule_tracepoint_set_filter( | |
499 | er, filter); | |
500 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
501 | fprintf(stderr, "Failed to set tracepoint filter expression.\n"); | |
502 | goto error; | |
503 | } | |
504 | } | |
505 | ||
506 | /* Set exclusion list. */ | |
507 | if (exclusion_list) { | |
508 | int n; | |
509 | ||
510 | /* Count number of items in exclusion list. */ | |
511 | for (n = 0; exclusion_list[n]; n++); | |
512 | ||
513 | event_rule_status = | |
514 | lttng_event_rule_tracepoint_set_exclusions(er, | |
515 | n, (const char **) exclusion_list); | |
516 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
517 | fprintf(stderr, "Failed to set tracepoint exclusion list.\n"); | |
518 | goto error; | |
519 | } | |
520 | } | |
521 | ||
522 | if (loglevel_str) { | |
523 | int loglevel; | |
524 | ||
525 | if (domain_type == LTTNG_DOMAIN_KERNEL) { | |
526 | fprintf(stderr, "Log levels are not supported by the kernel tracer.\n"); | |
527 | goto error; | |
528 | } | |
529 | ||
530 | loglevel = parse_loglevel_string( | |
531 | loglevel_str, domain_type); | |
532 | if (loglevel < 0) { | |
533 | fprintf(stderr, "Failed to parse `%s` as a log level.\n", loglevel_str); | |
534 | goto error; | |
535 | } | |
536 | ||
537 | if (loglevel_only) { | |
538 | event_rule_status = | |
539 | lttng_event_rule_tracepoint_set_loglevel( | |
540 | er, loglevel); | |
541 | } else { | |
542 | event_rule_status = | |
543 | lttng_event_rule_tracepoint_set_loglevel_range( | |
544 | er, loglevel); | |
545 | } | |
546 | ||
547 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
548 | fprintf(stderr, "Failed to set log level.\n"); | |
549 | goto error; | |
550 | } | |
551 | } | |
552 | ||
553 | break; | |
554 | } | |
555 | ||
556 | case LTTNG_EVENT_RULE_TYPE_KPROBE: | |
557 | { | |
558 | enum lttng_event_rule_status event_rule_status; | |
559 | ||
560 | er = lttng_event_rule_kprobe_create(); | |
561 | if (!er) { | |
562 | fprintf(stderr, "Failed to create kprobe event rule.\n"); | |
563 | goto error; | |
564 | } | |
565 | ||
566 | event_rule_status = lttng_event_rule_kprobe_set_name(er, tracepoint_name); | |
567 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
568 | fprintf(stderr, "Failed to set kprobe event rule's name.\n"); | |
569 | goto error; | |
570 | } | |
571 | ||
572 | assert(source); | |
573 | event_rule_status = lttng_event_rule_kprobe_set_source(er, source); | |
574 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
575 | fprintf(stderr, "Failed to set kprobe event rule's source.\n"); | |
576 | goto error; | |
577 | } | |
578 | ||
579 | break; | |
580 | } | |
581 | ||
582 | case LTTNG_EVENT_RULE_TYPE_UPROBE: | |
583 | { | |
584 | int ret; | |
585 | enum lttng_event_rule_status event_rule_status; | |
586 | ||
587 | ret = parse_userspace_probe_opts(source, &userspace_probe_location); | |
588 | if (ret) { | |
589 | fprintf(stderr, "Failed to parse userspace probe location.\n"); | |
590 | goto error; | |
591 | } | |
592 | ||
593 | er = lttng_event_rule_uprobe_create(); | |
594 | if (!er) { | |
595 | fprintf(stderr, "Failed to create userspace probe event rule.\n"); | |
596 | goto error; | |
597 | } | |
598 | ||
599 | event_rule_status = lttng_event_rule_uprobe_set_location(er, userspace_probe_location); | |
600 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
601 | fprintf(stderr, "Failed to set userspace probe event rule's location.\n"); | |
602 | goto error; | |
603 | } | |
604 | ||
605 | event_rule_status = lttng_event_rule_uprobe_set_name(er, tracepoint_name); | |
606 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
607 | fprintf(stderr, "Failed to set userspace probe event rule's name.\n"); | |
608 | goto error; | |
609 | } | |
610 | ||
611 | break; | |
612 | } | |
613 | ||
614 | case LTTNG_EVENT_RULE_TYPE_SYSCALL: | |
615 | { | |
616 | enum lttng_event_rule_status event_rule_status; | |
617 | ||
618 | er = lttng_event_rule_syscall_create(); | |
619 | if (!er) { | |
620 | fprintf(stderr, "Failed to create syscall event rule.\n"); | |
621 | goto error; | |
622 | } | |
623 | ||
624 | event_rule_status = lttng_event_rule_syscall_set_pattern(er, tracepoint_name); | |
625 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
626 | fprintf(stderr, "Failed to set syscall event rule's pattern.\n"); | |
627 | goto error; | |
628 | } | |
629 | ||
630 | if (filter) { | |
631 | event_rule_status = lttng_event_rule_syscall_set_filter( | |
632 | er, filter); | |
633 | if (event_rule_status != LTTNG_EVENT_RULE_STATUS_OK) { | |
634 | fprintf(stderr, "Failed to set syscall event rule's filter expression.\n"); | |
635 | goto error; | |
636 | } | |
637 | } | |
638 | ||
639 | break; | |
640 | } | |
641 | ||
642 | default: | |
643 | fprintf(stderr, "%s: I don't support event rules of type `%s` at the moment.\n", __func__, | |
644 | lttng_event_rule_type_str(event_rule_type)); | |
645 | goto error; | |
646 | } | |
647 | ||
648 | goto end; | |
649 | ||
650 | error: | |
651 | lttng_event_rule_destroy(er); | |
652 | er = NULL; | |
653 | ||
654 | end: | |
655 | argpar_item_destroy(item); | |
656 | free(error); | |
657 | argpar_state_destroy(state); | |
658 | free(filter); | |
659 | free(exclude); | |
660 | free(loglevel_str); | |
661 | strutils_free_null_terminated_array_of_strings(exclusion_list); | |
662 | lttng_userspace_probe_location_destroy(userspace_probe_location); | |
663 | return er; | |
664 | } | |
665 | ||
666 | static | |
667 | struct lttng_condition *handle_condition_event(int *argc, const char ***argv) | |
668 | { | |
669 | struct lttng_event_rule *er; | |
670 | struct lttng_condition *c; | |
671 | ||
672 | er = parse_event_rule(argc, argv); | |
673 | if (!er) { | |
674 | c = NULL; | |
675 | goto end; | |
676 | } | |
677 | ||
678 | c = lttng_condition_event_rule_create(er); | |
679 | if (!c) { | |
680 | goto end; | |
681 | } | |
682 | ||
683 | end: | |
684 | return c; | |
685 | } | |
686 | ||
687 | static | |
688 | struct lttng_condition *handle_condition_session_consumed_size(int *argc, const char ***argv) | |
689 | { | |
690 | struct lttng_condition *cond = NULL; | |
691 | struct argpar_state *state = NULL; | |
692 | struct argpar_item *item = NULL; | |
693 | const char *threshold_arg = NULL; | |
694 | const char *session_name_arg = NULL; | |
695 | uint64_t threshold; | |
696 | char *error = NULL; | |
697 | enum lttng_condition_status condition_status; | |
698 | ||
699 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); | |
700 | if (!state) { | |
701 | fprintf(stderr, "Failed to allocate an argpar state.\n"); | |
702 | goto error; | |
703 | } | |
704 | ||
705 | while (true) { | |
706 | enum argpar_state_parse_next_status status; | |
707 | ||
708 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
709 | status = argpar_state_parse_next(state, &item, &error); | |
710 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
711 | fprintf(stderr, "Error: %s\n", error); | |
712 | goto error; | |
713 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
714 | /* Just stop parsing here. */ | |
715 | break; | |
716 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
717 | break; | |
718 | } | |
719 | ||
720 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
721 | ||
722 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
723 | struct argpar_item_opt *item_opt = | |
724 | (struct argpar_item_opt *) item; | |
725 | ||
726 | switch (item_opt->descr->id) { | |
727 | default: | |
728 | abort(); | |
729 | } | |
730 | } else { | |
731 | struct argpar_item_non_opt *item_non_opt; | |
732 | ||
733 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); | |
734 | ||
735 | item_non_opt = (struct argpar_item_non_opt *) item; | |
736 | ||
737 | switch (item_non_opt->non_opt_index) { | |
738 | case 0: | |
739 | session_name_arg = item_non_opt->arg; | |
740 | break; | |
741 | case 1: | |
742 | threshold_arg = item_non_opt->arg; | |
743 | break; | |
744 | default: | |
745 | fprintf(stderr, "Unexpected argument `%s`.\n", | |
746 | item_non_opt->arg); | |
747 | goto error; | |
748 | } | |
749 | } | |
750 | } | |
751 | ||
752 | *argc -= argpar_state_get_ingested_orig_args(state); | |
753 | *argv += argpar_state_get_ingested_orig_args(state); | |
754 | ||
755 | if (!session_name_arg) { | |
756 | fprintf(stderr, "Missing session name argument.\n"); | |
757 | goto error; | |
758 | } | |
759 | ||
760 | if (!threshold_arg) { | |
761 | fprintf(stderr, "Missing threshold argument.\n"); | |
762 | goto error; | |
763 | } | |
764 | ||
765 | if (utils_parse_size_suffix(threshold_arg, &threshold) != 0) { | |
766 | fprintf(stderr, "Failed to parse `%s` as a size.\n", threshold_arg); | |
767 | goto error; | |
768 | } | |
769 | ||
770 | cond = lttng_condition_session_consumed_size_create(); | |
771 | if (!cond) { | |
772 | fprintf(stderr, "Failed to allocate a session consumed size condition.\n"); | |
773 | goto error; | |
774 | } | |
775 | ||
776 | condition_status = lttng_condition_session_consumed_size_set_session_name( | |
777 | cond, session_name_arg); | |
778 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { | |
779 | fprintf(stderr, "Failed to set session consumed size condition session name.\n"); | |
780 | goto error; | |
781 | } | |
782 | ||
783 | ||
784 | condition_status = lttng_condition_session_consumed_size_set_threshold( | |
785 | cond, threshold); | |
786 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { | |
787 | fprintf(stderr, "Failed to set session consumed size condition threshold.\n"); | |
788 | goto error; | |
789 | } | |
790 | ||
791 | goto end; | |
792 | ||
793 | error: | |
794 | lttng_condition_destroy(cond); | |
795 | cond = NULL; | |
796 | ||
797 | end: | |
798 | argpar_state_destroy(state); | |
799 | argpar_item_destroy(item); | |
800 | free(error); | |
801 | return cond; | |
802 | } | |
803 | ||
804 | static | |
805 | struct lttng_condition *handle_condition_buffer_usage_high(int *argc, const char ***argv) | |
806 | { | |
807 | struct lttng_condition *cond = NULL; | |
808 | struct argpar_state *state = NULL; | |
809 | struct argpar_item *item = NULL; | |
810 | const char *threshold_arg = NULL; | |
811 | const char *session_name_arg = NULL; | |
812 | uint64_t threshold; | |
813 | char *error = NULL; | |
814 | enum lttng_condition_status condition_status; | |
815 | ||
816 | state = argpar_state_create(*argc, *argv, event_rule_opt_descrs); | |
817 | if (!state) { | |
818 | fprintf(stderr, "Failed to allocate an argpar state.\n"); | |
819 | goto error; | |
820 | } | |
821 | ||
822 | while (true) { | |
823 | enum argpar_state_parse_next_status status; | |
824 | ||
825 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
826 | status = argpar_state_parse_next(state, &item, &error); | |
827 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
828 | fprintf(stderr, "Error: %s\n", error); | |
829 | goto error; | |
830 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
831 | /* Just stop parsing here. */ | |
832 | break; | |
833 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
834 | break; | |
835 | } | |
836 | ||
837 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
838 | ||
839 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
840 | struct argpar_item_opt *item_opt = | |
841 | (struct argpar_item_opt *) item; | |
842 | ||
843 | switch (item_opt->descr->id) { | |
844 | default: | |
845 | abort(); | |
846 | } | |
847 | } else { | |
848 | struct argpar_item_non_opt *item_non_opt; | |
849 | ||
850 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); | |
851 | ||
852 | item_non_opt = (struct argpar_item_non_opt *) item; | |
853 | ||
854 | switch (item_non_opt->non_opt_index) { | |
855 | case 0: | |
856 | session_name_arg = item_non_opt->arg; | |
857 | break; | |
858 | case 1: | |
859 | threshold_arg = item_non_opt->arg; | |
860 | break; | |
861 | default: | |
862 | fprintf(stderr, "Unexpected argument `%s`.\n", | |
863 | item_non_opt->arg); | |
864 | goto error; | |
865 | } | |
866 | } | |
867 | } | |
868 | ||
869 | *argc -= argpar_state_get_ingested_orig_args(state); | |
870 | *argv += argpar_state_get_ingested_orig_args(state); | |
871 | ||
872 | if (!session_name_arg) { | |
873 | fprintf(stderr, "Missing session name argument.\n"); | |
874 | goto error; | |
875 | } | |
876 | ||
877 | if (!threshold_arg) { | |
878 | fprintf(stderr, "Missing threshold argument.\n"); | |
879 | goto error; | |
880 | } | |
881 | ||
882 | if (utils_parse_size_suffix(threshold_arg, &threshold) != 0) { | |
883 | fprintf(stderr, "Failed to parse `%s` as a size.\n", threshold_arg); | |
884 | goto error; | |
885 | } | |
886 | ||
887 | cond = lttng_condition_session_consumed_size_create(); | |
888 | if (!cond) { | |
889 | fprintf(stderr, "Failed to allocate a session consumed size condition.\n"); | |
890 | goto error; | |
891 | } | |
892 | ||
893 | condition_status = lttng_condition_session_consumed_size_set_session_name( | |
894 | cond, session_name_arg); | |
895 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { | |
896 | fprintf(stderr, "Failed to set session consumed size condition session name.\n"); | |
897 | goto error; | |
898 | } | |
899 | ||
900 | condition_status = lttng_condition_session_consumed_size_set_threshold( | |
901 | cond, threshold); | |
902 | if (condition_status != LTTNG_CONDITION_STATUS_OK) { | |
903 | fprintf(stderr, "Failed to set session consumed size condition threshold.\n"); | |
904 | goto error; | |
905 | } | |
906 | ||
907 | goto end; | |
908 | ||
909 | error: | |
910 | lttng_condition_destroy(cond); | |
911 | cond = NULL; | |
912 | ||
913 | end: | |
914 | argpar_state_destroy(state); | |
915 | argpar_item_destroy(item); | |
916 | free(error); | |
917 | return cond; | |
918 | } | |
919 | ||
920 | static | |
921 | struct lttng_condition *handle_condition_buffer_usage_low(int *argc, const char ***argv) | |
922 | { | |
923 | return NULL; | |
924 | } | |
925 | ||
926 | static | |
927 | struct lttng_condition *handle_condition_session_rotation_ongoing(int *argc, const char ***argv) | |
928 | { | |
929 | return NULL; | |
930 | } | |
931 | ||
932 | static | |
933 | struct lttng_condition *handle_condition_session_rotation_completed(int *argc, const char ***argv) | |
934 | { | |
935 | return NULL; | |
936 | } | |
937 | ||
938 | struct condition_descr { | |
939 | const char *name; | |
940 | struct lttng_condition *(*handler) (int *argc, const char ***argv); | |
941 | }; | |
942 | ||
943 | static const | |
944 | struct condition_descr condition_descrs[] = { | |
945 | { "on-event", handle_condition_event }, | |
946 | { "on-session-consumed-size", handle_condition_session_consumed_size }, | |
947 | { "on-buffer-usage-high", handle_condition_buffer_usage_high }, | |
948 | { "on-buffer-usage-low", handle_condition_buffer_usage_low }, | |
949 | { "on-session-rotation-ongoing", handle_condition_session_rotation_ongoing }, | |
950 | { "on-session-rotation-completed", handle_condition_session_rotation_completed }, | |
951 | }; | |
952 | ||
953 | static | |
954 | struct lttng_condition *parse_condition(int *argc, const char ***argv) | |
955 | { | |
956 | int i; | |
957 | struct lttng_condition *cond; | |
958 | const char *condition_name; | |
959 | const struct condition_descr *descr = NULL; | |
960 | ||
961 | if (*argc == 0) { | |
962 | fprintf(stderr, "Missing condition name.\n"); | |
963 | goto error; | |
964 | } | |
965 | ||
966 | condition_name = (*argv)[0]; | |
967 | ||
968 | (*argc)--; | |
969 | (*argv)++; | |
970 | ||
971 | for (i = 0; i < ARRAY_SIZE(condition_descrs); i++) { | |
972 | if (strcmp(condition_name, condition_descrs[i].name) == 0) { | |
973 | descr = &condition_descrs[i]; | |
974 | break; | |
975 | } | |
976 | } | |
977 | ||
978 | if (!descr) { | |
979 | fprintf(stderr, "Unknown condition name: %s\n", condition_name); | |
980 | goto error; | |
981 | } | |
982 | ||
983 | cond = descr->handler(argc, argv); | |
984 | if (!cond) { | |
985 | /* The handler has already printed an error message. */ | |
986 | goto error; | |
987 | } | |
988 | ||
989 | goto end; | |
990 | error: | |
991 | cond = NULL; | |
992 | end: | |
993 | return cond; | |
994 | } | |
995 | ||
996 | ||
997 | static | |
998 | struct lttng_action *handle_action_notify(int *argc, const char ***argv) | |
999 | { | |
1000 | return lttng_action_notify_create(); | |
1001 | } | |
1002 | ||
1003 | static const struct argpar_opt_descr no_opt_descrs[] = { | |
1004 | ARGPAR_OPT_DESCR_SENTINEL | |
1005 | }; | |
1006 | ||
1007 | /* | |
1008 | * Generic handler for a kind of action that takes a session name as its sole | |
1009 | * argument. | |
1010 | */ | |
1011 | ||
1012 | static | |
1013 | struct lttng_action *handle_action_simple_session( | |
1014 | int *argc, const char ***argv, | |
1015 | struct lttng_action *(*create_action_cb)(void), | |
1016 | enum lttng_action_status (*set_session_name_cb)(struct lttng_action *, const char *), | |
1017 | const char *action_name) | |
1018 | { | |
1019 | struct lttng_action *action = NULL; | |
1020 | struct argpar_state *state = NULL; | |
1021 | struct argpar_item *item = NULL; | |
1022 | const char *session_name_arg = NULL; | |
1023 | char *error = NULL; | |
1024 | enum lttng_action_status action_status; | |
1025 | ||
1026 | state = argpar_state_create(*argc, *argv, no_opt_descrs); | |
1027 | if (!state) { | |
1028 | fprintf(stderr, "Failed to allocate an argpar state.\n"); | |
1029 | goto error; | |
1030 | } | |
1031 | ||
1032 | while (true) { | |
1033 | enum argpar_state_parse_next_status status; | |
1034 | struct argpar_item_non_opt *item_non_opt; | |
1035 | ||
1036 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
1037 | status = argpar_state_parse_next(state, &item, &error); | |
1038 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1039 | fprintf(stderr, "Error: %s\n", error); | |
1040 | goto error; | |
1041 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
1042 | /* Just stop parsing here. */ | |
1043 | break; | |
1044 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1045 | break; | |
1046 | } | |
1047 | ||
1048 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
1049 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); | |
1050 | ||
1051 | item_non_opt = (struct argpar_item_non_opt *) item; | |
1052 | ||
1053 | switch (item_non_opt->non_opt_index) { | |
1054 | case 0: | |
1055 | session_name_arg = item_non_opt->arg; | |
1056 | break; | |
1057 | default: | |
1058 | fprintf(stderr, "Unexpected argument `%s`.\n", | |
1059 | item_non_opt->arg); | |
1060 | goto error; | |
1061 | } | |
1062 | } | |
1063 | ||
1064 | *argc -= argpar_state_get_ingested_orig_args(state); | |
1065 | *argv += argpar_state_get_ingested_orig_args(state); | |
1066 | ||
1067 | if (!session_name_arg) { | |
1068 | fprintf(stderr, "Missing session name.\n"); | |
1069 | goto error; | |
1070 | } | |
1071 | ||
1072 | action = create_action_cb(); | |
1073 | if (!action) { | |
1074 | fprintf(stderr, | |
1075 | "Failed to allocate %s session action.\n", action_name); | |
1076 | goto error; | |
1077 | } | |
1078 | ||
1079 | action_status = set_session_name_cb(action, session_name_arg); | |
1080 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
1081 | fprintf(stderr, | |
1082 | "Failed to set action %s session's session name.\n", | |
1083 | action_name); | |
1084 | goto error; | |
1085 | } | |
1086 | ||
1087 | goto end; | |
1088 | ||
1089 | error: | |
1090 | lttng_action_destroy(action); | |
1091 | action = NULL; | |
1092 | ||
1093 | end: | |
1094 | return action; | |
1095 | } | |
1096 | ||
1097 | static | |
1098 | struct lttng_action *handle_action_start_session(int *argc, | |
1099 | const char ***argv) | |
1100 | { | |
1101 | return handle_action_simple_session(argc, argv, | |
1102 | lttng_action_start_session_create, | |
1103 | lttng_action_start_session_set_session_name, | |
1104 | "start"); | |
1105 | } | |
1106 | ||
1107 | static | |
1108 | struct lttng_action *handle_action_stop_session(int *argc, | |
1109 | const char ***argv) | |
1110 | { | |
1111 | return handle_action_simple_session(argc, argv, | |
1112 | lttng_action_stop_session_create, | |
1113 | lttng_action_stop_session_set_session_name, | |
1114 | "stop"); | |
1115 | } | |
1116 | ||
1117 | static | |
1118 | struct lttng_action *handle_action_rotate_session(int *argc, | |
1119 | const char ***argv) | |
1120 | { | |
1121 | return handle_action_simple_session(argc, argv, | |
1122 | lttng_action_rotate_session_create, | |
1123 | lttng_action_rotate_session_set_session_name, | |
1124 | "rotate"); | |
1125 | } | |
1126 | ||
1127 | static const struct argpar_opt_descr snapshot_action_opt_descrs[] = { | |
1128 | { OPT_NAME, 'n', "name", true }, | |
1129 | { OPT_MAX_SIZE, 'm', "max-size", true }, | |
1130 | { OPT_CTRL_URL, '\0', "ctrl-url", true }, | |
1131 | { OPT_DATA_URL, '\0', "data-url", true }, | |
1132 | ARGPAR_OPT_DESCR_SENTINEL | |
1133 | }; | |
1134 | ||
1135 | static | |
1136 | struct lttng_action *handle_action_snapshot_session(int *argc, | |
1137 | const char ***argv) | |
1138 | { | |
1139 | struct lttng_action *action = NULL; | |
1140 | struct argpar_state *state = NULL; | |
1141 | struct argpar_item *item = NULL; | |
1142 | const char *session_name_arg = NULL; | |
1143 | char *snapshot_name_arg = NULL; | |
1144 | char *ctrl_url_arg = NULL; | |
1145 | char *data_url_arg = NULL; | |
1146 | char *max_size_arg = NULL; | |
1147 | const char *url_arg = NULL; | |
1148 | char *error = NULL; | |
1149 | enum lttng_action_status action_status; | |
1150 | struct lttng_snapshot_output *snapshot_output = NULL; | |
1151 | int ret; | |
1152 | ||
1153 | state = argpar_state_create(*argc, *argv, snapshot_action_opt_descrs); | |
1154 | if (!state) { | |
1155 | fprintf(stderr, "Failed to allocate an argpar state.\n"); | |
1156 | goto error; | |
1157 | } | |
1158 | ||
1159 | while (true) { | |
1160 | enum argpar_state_parse_next_status status; | |
1161 | ||
1162 | ARGPAR_ITEM_DESTROY_AND_RESET(item); | |
1163 | status = argpar_state_parse_next(state, &item, &error); | |
1164 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1165 | fprintf(stderr, "Error: %s\n", error); | |
1166 | goto error; | |
1167 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
1168 | /* Just stop parsing here. */ | |
1169 | break; | |
1170 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1171 | break; | |
1172 | } | |
1173 | ||
1174 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
1175 | ||
1176 | if (item->type == ARGPAR_ITEM_TYPE_OPT) { | |
1177 | struct argpar_item_opt *item_opt = | |
1178 | (struct argpar_item_opt *) item; | |
1179 | ||
1180 | switch (item_opt->descr->id) { | |
1181 | case OPT_NAME: | |
1182 | if (!assign_string(&snapshot_name_arg, item_opt->arg, "--name/-n")) { | |
1183 | goto error; | |
1184 | } | |
1185 | break; | |
1186 | ||
1187 | case OPT_MAX_SIZE: | |
1188 | if (!assign_string(&max_size_arg, item_opt->arg, "--max-size/-m")) { | |
1189 | goto error; | |
1190 | } | |
1191 | break; | |
1192 | ||
1193 | case OPT_CTRL_URL: | |
1194 | if (!assign_string(&ctrl_url_arg, item_opt->arg, "--ctrl-url")) { | |
1195 | goto error; | |
1196 | } | |
1197 | break; | |
1198 | ||
1199 | case OPT_DATA_URL: | |
1200 | if (!assign_string(&data_url_arg, item_opt->arg, "--data-url")) { | |
1201 | goto error; | |
1202 | } | |
1203 | break; | |
1204 | ||
1205 | default: | |
1206 | abort(); | |
1207 | } | |
1208 | } else { | |
1209 | struct argpar_item_non_opt *item_non_opt; | |
1210 | ||
1211 | assert(item->type == ARGPAR_ITEM_TYPE_NON_OPT); | |
1212 | ||
1213 | item_non_opt = (struct argpar_item_non_opt *) item; | |
1214 | ||
1215 | switch (item_non_opt->non_opt_index) { | |
1216 | case 0: | |
1217 | session_name_arg = item_non_opt->arg; | |
1218 | break; | |
1219 | ||
1220 | // FIXME: the use of a non-option argument for this is to | |
1221 | // follow the syntax of `lttng snapshot record`. But otherwise, | |
1222 | // I think an option argument would be best. | |
1223 | case 1: | |
1224 | url_arg = item_non_opt->arg; | |
1225 | break; | |
1226 | ||
1227 | default: | |
1228 | fprintf(stderr, "Unexpected argument `%s`.\n", | |
1229 | item_non_opt->arg); | |
1230 | goto error; | |
1231 | } | |
1232 | } | |
1233 | } | |
1234 | ||
1235 | *argc -= argpar_state_get_ingested_orig_args(state); | |
1236 | *argv += argpar_state_get_ingested_orig_args(state); | |
1237 | ||
1238 | if (!session_name_arg) { | |
1239 | fprintf(stderr, "Missing session name.\n"); | |
1240 | goto error; | |
1241 | } | |
1242 | ||
1243 | /* --ctrl-url and --data-url must come in pair. */ | |
1244 | if (ctrl_url_arg && !data_url_arg) { | |
1245 | fprintf(stderr, "--ctrl-url is specified, but --data-url is missing.\n"); | |
1246 | goto error; | |
1247 | } | |
1248 | ||
1249 | if (!ctrl_url_arg && data_url_arg) { | |
1250 | fprintf(stderr, "--data-url is specified, but --ctrl-url is missing.\n"); | |
1251 | goto error; | |
1252 | } | |
1253 | ||
1254 | /* --ctrl-url/--data-url and the non-option URL are mutually exclusive. */ | |
1255 | if (ctrl_url_arg && url_arg) { | |
1256 | fprintf(stderr, "Both --ctrl-url/--data-url and the non-option URL argument " | |
1257 | "can't be used together.\n"); | |
1258 | goto error; | |
1259 | } | |
1260 | ||
1261 | /* | |
1262 | * Did the user specify an option that implies using a | |
1263 | * custom/unregistered output? | |
1264 | */ | |
1265 | if (url_arg || ctrl_url_arg) { | |
1266 | snapshot_output = lttng_snapshot_output_create(); | |
1267 | if (!snapshot_output) { | |
1268 | fprintf(stderr, "Failed to allocate a snapshot output.\n"); | |
1269 | goto error; | |
1270 | } | |
1271 | } | |
1272 | ||
1273 | action = lttng_action_snapshot_session_create(); | |
1274 | if (!action) { | |
1275 | fprintf(stderr, | |
1276 | "Failed to allocate snapshot session action.\n"); | |
1277 | goto error; | |
1278 | } | |
1279 | ||
1280 | action_status = lttng_action_snapshot_session_set_session_name( | |
1281 | action, session_name_arg); | |
1282 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
1283 | fprintf(stderr, | |
1284 | "Failed to set action snapshot session's session name.\n"); | |
1285 | goto error; | |
1286 | } | |
1287 | ||
1288 | if (snapshot_name_arg) { | |
1289 | if (!snapshot_output) { | |
1290 | fprintf(stderr, "Can't provide a snapshot output name without a snapshot output destination.\n"); | |
1291 | goto error; | |
1292 | } | |
1293 | ||
1294 | ret = lttng_snapshot_output_set_name(snapshot_name_arg, snapshot_output); | |
1295 | if (ret != 0) { | |
1296 | fprintf(stderr, "Failed to set name of snapshot output.\n"); | |
1297 | goto error; | |
1298 | } | |
1299 | } | |
1300 | ||
1301 | if (max_size_arg) { | |
1302 | uint64_t max_size; | |
1303 | ||
1304 | if (!snapshot_output) { | |
1305 | fprintf(stderr, "Can't provide a snapshot output max size without a snapshot output destination.\n"); | |
1306 | goto error; | |
1307 | } | |
1308 | ||
1309 | ret = utils_parse_size_suffix(max_size_arg, &max_size); | |
1310 | if (ret != 0) { | |
1311 | fprintf(stderr, "Failed to parse `%s` as a size.\n", max_size_arg); | |
1312 | goto error; | |
1313 | } | |
1314 | ||
1315 | ret = lttng_snapshot_output_set_size(max_size, snapshot_output); | |
1316 | if (ret != 0) { | |
1317 | fprintf(stderr, "Failed to set snapshot output's max size.\n"); | |
1318 | goto error; | |
1319 | } | |
1320 | } | |
1321 | ||
1322 | if (url_arg) { | |
1323 | /* One argument form, either net:// / net6:// or a local file path. */ | |
1324 | ||
1325 | if (strncmp(url_arg, "net://", strlen("net://")) == 0 || | |
1326 | strncmp(url_arg, "net6://", strlen("net6://")) == 0) { | |
1327 | ret = lttng_snapshot_output_set_network_url( | |
1328 | url_arg, snapshot_output); | |
1329 | if (ret != 0) { | |
1330 | fprintf(stderr, "Failed to parse %s as a network URL.\n", url_arg); | |
1331 | goto error; | |
1332 | } | |
1333 | } else { | |
1334 | ret = lttng_snapshot_output_set_local_path( | |
1335 | url_arg, snapshot_output); | |
1336 | if (ret != 0) { | |
1337 | fprintf(stderr, "Failed to parse %s as a local path.\n", url_arg); | |
1338 | goto error; | |
1339 | } | |
1340 | } | |
1341 | } | |
1342 | ||
1343 | if (ctrl_url_arg) { | |
1344 | /* | |
1345 | * Two argument form, network output with separate control and | |
1346 | * data URLs. | |
1347 | */ | |
1348 | ret = lttng_snapshot_output_set_network_urls( | |
1349 | ctrl_url_arg, data_url_arg, snapshot_output); | |
1350 | if (ret != 0) { | |
1351 | fprintf(stderr, "Failed to parse `%s` and `%s` as control and data URLs.\n", | |
1352 | ctrl_url_arg, data_url_arg); | |
1353 | goto error; | |
1354 | } | |
1355 | } | |
1356 | ||
1357 | if (snapshot_output) { | |
1358 | action_status = lttng_action_snapshot_session_set_output( | |
1359 | action, snapshot_output); | |
1360 | if (action_status != LTTNG_ACTION_STATUS_OK) { | |
1361 | fprintf(stderr, "Failed to set snapshot session action's output.\n"); | |
1362 | goto error; | |
1363 | } | |
1364 | ||
1365 | /* Ownership of `snapshot_output` has been transferred to the action. */ | |
1366 | snapshot_output = NULL; | |
1367 | } | |
1368 | ||
1369 | goto end; | |
1370 | ||
1371 | error: | |
1372 | lttng_action_destroy(action); | |
1373 | action = NULL; | |
1374 | ||
1375 | end: | |
1376 | free(snapshot_name_arg); | |
1377 | free(ctrl_url_arg); | |
1378 | free(data_url_arg); | |
1379 | free(snapshot_output); | |
1380 | return action; | |
1381 | } | |
1382 | ||
1383 | struct action_descr { | |
1384 | const char *name; | |
1385 | struct lttng_action *(*handler) (int *argc, const char ***argv); | |
1386 | }; | |
1387 | ||
1388 | static const | |
1389 | struct action_descr action_descrs[] = { | |
1390 | { "notify", handle_action_notify }, | |
1391 | { "start-session", handle_action_start_session }, | |
1392 | { "stop-session", handle_action_stop_session }, | |
1393 | { "rotate-session", handle_action_rotate_session }, | |
1394 | { "snapshot-session", handle_action_snapshot_session }, | |
1395 | }; | |
1396 | ||
1397 | static | |
1398 | struct lttng_action *parse_action(int *argc, const char ***argv) | |
1399 | { | |
1400 | int i; | |
1401 | struct lttng_action *action; | |
1402 | const char *action_name; | |
1403 | const struct action_descr *descr = NULL; | |
1404 | ||
1405 | if (*argc == 0) { | |
1406 | fprintf(stderr, "Missing action name.\n"); | |
1407 | goto error; | |
1408 | } | |
1409 | ||
1410 | action_name = (*argv)[0]; | |
1411 | ||
1412 | (*argc)--; | |
1413 | (*argv)++; | |
1414 | ||
1415 | for (i = 0; i < ARRAY_SIZE(action_descrs); i++) { | |
1416 | if (strcmp(action_name, action_descrs[i].name) == 0) { | |
1417 | descr = &action_descrs[i]; | |
1418 | break; | |
1419 | } | |
1420 | } | |
1421 | ||
1422 | if (!descr) { | |
1423 | fprintf(stderr, "Unknown action name: %s\n", action_name); | |
1424 | goto error; | |
1425 | } | |
1426 | ||
1427 | action = descr->handler(argc, argv); | |
1428 | if (!action) { | |
1429 | /* The handler has already printed an error message. */ | |
1430 | goto error; | |
1431 | } | |
1432 | ||
1433 | goto end; | |
1434 | error: | |
1435 | action = NULL; | |
1436 | end: | |
1437 | return action; | |
1438 | } | |
1439 | ||
1440 | static const | |
1441 | struct argpar_opt_descr add_trigger_options[] = { | |
1442 | { OPT_HELP, 'h', "help", false }, | |
1443 | { OPT_LIST_OPTIONS, '\0', "list-options", false }, | |
1444 | { OPT_CONDITION, '\0', "condition", false }, | |
1445 | { OPT_ACTION, '\0', "action", false }, | |
1446 | { OPT_ID, '\0', "id", true }, | |
1447 | { OPT_FIRE_ONCE_AFTER, '\0', "fire-once-after", true }, | |
1448 | { OPT_FIRE_EVERY, '\0', "fire-every", true }, | |
1449 | ARGPAR_OPT_DESCR_SENTINEL, | |
1450 | }; | |
1451 | ||
1452 | static | |
1453 | void lttng_actions_destructor(void *p) | |
1454 | { | |
1455 | struct lttng_action *action = p; | |
1456 | ||
1457 | lttng_action_destroy(action); | |
1458 | } | |
1459 | ||
1460 | int cmd_add_trigger(int argc, const char **argv) | |
1461 | { | |
1462 | int ret; | |
1463 | int my_argc = argc - 1; | |
1464 | const char **my_argv = argv + 1; | |
1465 | struct lttng_condition *condition = NULL; | |
1466 | struct lttng_dynamic_pointer_array actions; | |
1467 | struct argpar_state *argpar_state = NULL; | |
1468 | struct argpar_item *argpar_item = NULL; | |
1469 | struct lttng_action *action_group = NULL; | |
1470 | struct lttng_action *action = NULL; | |
1471 | struct lttng_trigger *trigger = NULL; | |
1472 | char *error = NULL; | |
1473 | char *id = NULL; | |
1474 | int i; | |
1475 | char *fire_once_after_str = NULL; | |
1476 | char *fire_every_str = NULL; | |
1477 | ||
1478 | lttng_dynamic_pointer_array_init(&actions, lttng_actions_destructor); | |
1479 | ||
1480 | while (true) { | |
1481 | enum argpar_state_parse_next_status status; | |
1482 | struct argpar_item_opt *item_opt; | |
1483 | int ingested_args; | |
1484 | ||
1485 | argpar_state_destroy(argpar_state); | |
1486 | argpar_state = argpar_state_create(my_argc, my_argv, | |
1487 | add_trigger_options); | |
1488 | if (!argpar_state) { | |
1489 | fprintf(stderr, "Failed to create argpar state.\n"); | |
1490 | goto error; | |
1491 | } | |
1492 | ||
1493 | status = argpar_state_parse_next(argpar_state, &argpar_item, &error); | |
1494 | ||
1495 | if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR) { | |
1496 | fprintf(stderr, "Error: %s\n", error); | |
1497 | goto error; | |
1498 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_ERROR_UNKNOWN_OPT) { | |
1499 | fprintf(stderr, "%s\n", error); | |
1500 | goto error; | |
1501 | } else if (status == ARGPAR_STATE_PARSE_NEXT_STATUS_END) { | |
1502 | break; | |
1503 | } | |
1504 | ||
1505 | assert(status == ARGPAR_STATE_PARSE_NEXT_STATUS_OK); | |
1506 | ||
1507 | if (argpar_item->type == ARGPAR_ITEM_TYPE_NON_OPT) { | |
1508 | struct argpar_item_non_opt *item_non_opt = | |
1509 | (struct argpar_item_non_opt *) argpar_item; | |
1510 | ||
1511 | fprintf(stderr, "Unexpected argument `%s`.\n", | |
1512 | item_non_opt->arg); | |
1513 | goto error; | |
1514 | } | |
1515 | ||
1516 | item_opt = (struct argpar_item_opt *) argpar_item; | |
1517 | ||
1518 | ingested_args = argpar_state_get_ingested_orig_args( | |
1519 | argpar_state); | |
1520 | ||
1521 | my_argc -= ingested_args; | |
1522 | my_argv += ingested_args; | |
1523 | ||
1524 | switch (item_opt->descr->id) { | |
1525 | case OPT_HELP: | |
1526 | SHOW_HELP(); | |
1527 | ret = 0; | |
1528 | goto end; | |
1529 | ||
1530 | case OPT_LIST_OPTIONS: | |
1531 | list_cmd_options_argpar(stdout, add_trigger_options); | |
1532 | ret = 0; | |
1533 | goto end; | |
1534 | ||
1535 | case OPT_CONDITION: | |
1536 | { | |
1537 | if (condition) { | |
1538 | fprintf(stderr, "A --condition was already given.\n"); | |
1539 | goto error; | |
1540 | } | |
1541 | ||
1542 | condition = parse_condition(&my_argc, &my_argv); | |
1543 | if (!condition) { | |
1544 | /* | |
1545 | * An error message was already printed by | |
1546 | * parse_condition. | |
1547 | */ | |
1548 | goto error; | |
1549 | } | |
1550 | ||
1551 | break; | |
1552 | } | |
1553 | ||
1554 | case OPT_ACTION: | |
1555 | { | |
1556 | action = parse_action(&my_argc, &my_argv); | |
1557 | if (!action) { | |
1558 | /* | |
1559 | * An error message was already printed by | |
1560 | * parse_condition. | |
1561 | */ | |
1562 | goto error; | |
1563 | } | |
1564 | ||
1565 | ret = lttng_dynamic_pointer_array_add_pointer( | |
1566 | &actions, action); | |
1567 | if (ret) { | |
1568 | fprintf(stderr, "Failed to add pointer to pointer array.\n"); | |
1569 | goto error; | |
1570 | } | |
1571 | ||
1572 | /* Ownership of the action was transferred to the group. */ | |
1573 | action = NULL; | |
1574 | ||
1575 | break; | |
1576 | } | |
1577 | ||
1578 | case OPT_ID: | |
1579 | { | |
1580 | if (!assign_string(&id, item_opt->arg, "--id")) { | |
1581 | goto error; | |
1582 | } | |
1583 | ||
1584 | break; | |
1585 | } | |
1586 | ||
1587 | case OPT_FIRE_ONCE_AFTER: | |
1588 | { | |
1589 | if (!assign_string(&fire_once_after_str, item_opt->arg, | |
1590 | "--fire-once-after")) { | |
1591 | goto error; | |
1592 | } | |
1593 | break; | |
1594 | } | |
1595 | ||
1596 | case OPT_FIRE_EVERY: | |
1597 | { | |
1598 | if (!assign_string(&fire_every_str, item_opt->arg, | |
1599 | "--fire-every")) { | |
1600 | goto error; | |
1601 | } | |
1602 | break; | |
1603 | } | |
1604 | ||
1605 | default: | |
1606 | abort(); | |
1607 | } | |
1608 | } | |
1609 | ||
1610 | if (!condition) { | |
1611 | fprintf(stderr, "Missing --condition.\n"); | |
1612 | goto error; | |
1613 | } | |
1614 | ||
1615 | if (lttng_dynamic_pointer_array_get_count(&actions) == 0) { | |
1616 | fprintf(stderr, "Need at least one --action.\n"); | |
1617 | goto error; | |
1618 | } | |
1619 | ||
1620 | if (fire_every_str && fire_once_after_str) { | |
1621 | fprintf(stderr, "Can't specify both --fire-once-after and --fire-every.\n"); | |
1622 | goto error; | |
1623 | } | |
1624 | ||
1625 | action_group = lttng_action_group_create(); | |
1626 | if (!action_group) { | |
1627 | goto error; | |
1628 | } | |
1629 | ||
1630 | for (i = 0; i < lttng_dynamic_pointer_array_get_count(&actions); i++) { | |
1631 | enum lttng_action_status status; | |
1632 | ||
1633 | action = lttng_dynamic_pointer_array_steal_pointer(&actions, i); | |
1634 | ||
1635 | status = lttng_action_group_add_action( | |
1636 | action_group, action); | |
1637 | if (status != LTTNG_ACTION_STATUS_OK) { | |
1638 | goto error; | |
1639 | } | |
1640 | ||
1641 | /* Ownership of the action was transferred to the group. */ | |
1642 | action = NULL; | |
1643 | } | |
1644 | ||
1645 | ||
1646 | trigger = lttng_trigger_create(condition, action_group); | |
1647 | if (!trigger) { | |
1648 | goto error; | |
1649 | } | |
1650 | ||
1651 | /* | |
1652 | * Ownership of the condition and action group was transferred to the | |
1653 | * trigger. | |
1654 | */ | |
1655 | condition = NULL; | |
1656 | action_group = NULL; | |
1657 | ||
1658 | if (id) { | |
1659 | enum lttng_trigger_status trigger_status = | |
1660 | lttng_trigger_set_name(trigger, id); | |
1661 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
1662 | fprintf(stderr, "Failed to set trigger id.\n"); | |
1663 | goto error; | |
1664 | } | |
1665 | } | |
1666 | ||
1667 | if (fire_once_after_str) { | |
1668 | unsigned long long threshold; | |
1669 | enum lttng_trigger_status trigger_status; | |
1670 | ||
1671 | if (utils_parse_unsigned_long_long(fire_once_after_str, &threshold) != 0) { | |
1672 | fprintf(stderr, "Failed to parse `%s` as an integer.\n", fire_once_after_str); | |
1673 | goto error; | |
1674 | } | |
1675 | ||
1676 | trigger_status = lttng_trigger_set_firing_policy(trigger, | |
1677 | LTTNG_TRIGGER_FIRE_ONCE_AFTER_N, threshold); | |
1678 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
1679 | fprintf(stderr, "Failed to set trigger's firing policy.\n"); | |
1680 | goto error; | |
1681 | } | |
1682 | } | |
1683 | ||
1684 | if (fire_every_str) { | |
1685 | unsigned long long threshold; | |
1686 | enum lttng_trigger_status trigger_status; | |
1687 | ||
1688 | if (utils_parse_unsigned_long_long(fire_every_str, &threshold) != 0) { | |
1689 | fprintf(stderr, "Failed to parse `%s` as an integer.\n", fire_every_str); | |
1690 | goto error; | |
1691 | } | |
1692 | ||
1693 | trigger_status = lttng_trigger_set_firing_policy(trigger, | |
1694 | LTTNG_TRIGGER_FIRE_EVERY_N, threshold); | |
1695 | if (trigger_status != LTTNG_TRIGGER_STATUS_OK) { | |
1696 | fprintf(stderr, "Failed to set trigger's firing policy.\n"); | |
1697 | goto error; | |
1698 | } | |
1699 | } | |
1700 | ||
1701 | ret = lttng_register_trigger(trigger); | |
1702 | if (ret) { | |
1703 | fprintf(stderr, "Failed to register trigger: %s.\n", | |
1704 | lttng_strerror(ret)); | |
1705 | goto error; | |
1706 | } | |
1707 | ||
1708 | printf("Trigger registered successfully.\n"); | |
1709 | ||
1710 | goto end; | |
1711 | ||
1712 | error: | |
1713 | ret = 1; | |
1714 | ||
1715 | end: | |
1716 | argpar_state_destroy(argpar_state); | |
1717 | lttng_dynamic_pointer_array_reset(&actions); | |
1718 | lttng_condition_destroy(condition); | |
1719 | lttng_action_destroy(action_group); | |
1720 | lttng_trigger_destroy(trigger); | |
1721 | free(id); | |
1722 | free(fire_once_after_str); | |
1723 | free(fire_every_str); | |
1724 | // TODO: check what else to free | |
1725 | ||
1726 | return ret; | |
1727 | } |