Commit | Line | Data |
---|---|---|
ce5aef0b MD |
1 | /* |
2 | * ltt-probes.c | |
3 | * | |
4 | * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
5 | * | |
6 | * Holds LTTng probes registry. | |
7 | * | |
8 | * Dual LGPL v2.1/GPL v2 license. | |
9 | */ | |
10 | ||
8d8a24c8 MD |
11 | #include <string.h> |
12 | #include <errno.h> | |
13 | #include <urcu/list.h> | |
1f18504e | 14 | #include <urcu/hlist.h> |
4318ae1b | 15 | #include <lttng/ust-events.h> |
a3bb4b27 | 16 | #include <assert.h> |
c8fcf224 | 17 | #include <helper.h> |
48740cab | 18 | #include <ctype.h> |
ce5aef0b | 19 | |
8165c8da | 20 | #include "ltt-tracer-core.h" |
1f18504e MD |
21 | #include "jhash.h" |
22 | #include "error.h" | |
8165c8da MD |
23 | |
24 | /* | |
17dfb34b | 25 | * probe list is protected by ust_lock()/ust_unlock(). |
8165c8da | 26 | */ |
8d8a24c8 | 27 | static CDS_LIST_HEAD(probe_list); |
ce5aef0b | 28 | |
1f18504e MD |
29 | /* |
30 | * Loglevel hash table, containing the active loglevels. | |
31 | * Protected by ust lock. | |
32 | */ | |
33 | #define LOGLEVEL_HASH_BITS 6 | |
34 | #define LOGLEVEL_TABLE_SIZE (1 << LOGLEVEL_HASH_BITS) | |
35 | static struct cds_hlist_head loglevel_table[LOGLEVEL_TABLE_SIZE]; | |
36 | ||
e6c12e3d MD |
37 | /* |
38 | * Wildcard list, containing the active wildcards. | |
39 | * Protected by ust lock. | |
40 | */ | |
41 | static CDS_LIST_HEAD(wildcard_list); | |
42 | ||
df854e41 MD |
43 | static |
44 | const struct lttng_probe_desc *find_provider(const char *provider) | |
45 | { | |
46 | struct lttng_probe_desc *iter; | |
47 | ||
48 | cds_list_for_each_entry(iter, &probe_list, head) { | |
49 | if (!strcmp(iter->provider, provider)) | |
50 | return iter; | |
51 | } | |
52 | return NULL; | |
53 | } | |
54 | ||
ce5aef0b MD |
55 | static |
56 | const struct lttng_event_desc *find_event(const char *name) | |
57 | { | |
58 | struct lttng_probe_desc *probe_desc; | |
59 | int i; | |
60 | ||
8d8a24c8 | 61 | cds_list_for_each_entry(probe_desc, &probe_list, head) { |
ce5aef0b | 62 | for (i = 0; i < probe_desc->nr_events; i++) { |
df854e41 MD |
63 | if (!strcmp(probe_desc->event_desc[i]->name, name)) |
64 | return probe_desc->event_desc[i]; | |
ce5aef0b MD |
65 | } |
66 | } | |
67 | return NULL; | |
68 | } | |
69 | ||
70 | int ltt_probe_register(struct lttng_probe_desc *desc) | |
71 | { | |
df854e41 | 72 | struct lttng_probe_desc *iter; |
ce5aef0b MD |
73 | int ret = 0; |
74 | int i; | |
75 | ||
17dfb34b | 76 | ust_lock(); |
df854e41 MD |
77 | if (find_provider(desc->provider)) { |
78 | ret = -EEXIST; | |
79 | goto end; | |
80 | } | |
ce5aef0b MD |
81 | /* |
82 | * TODO: This is O(N^2). Turn into a hash table when probe registration | |
83 | * overhead becomes an issue. | |
84 | */ | |
85 | for (i = 0; i < desc->nr_events; i++) { | |
df854e41 | 86 | if (find_event(desc->event_desc[i]->name)) { |
ce5aef0b MD |
87 | ret = -EEXIST; |
88 | goto end; | |
89 | } | |
90 | } | |
df854e41 MD |
91 | |
92 | /* | |
93 | * We sort the providers by struct lttng_probe_desc pointer | |
94 | * address. | |
95 | */ | |
96 | cds_list_for_each_entry_reverse(iter, &probe_list, head) { | |
97 | BUG_ON(iter == desc); /* Should never be in the list twice */ | |
98 | if (iter < desc) { | |
99 | /* We belong to the location right after iter. */ | |
100 | cds_list_add(&desc->head, &iter->head); | |
101 | goto desc_added; | |
102 | } | |
103 | } | |
104 | /* We should be added at the head of the list */ | |
8d8a24c8 | 105 | cds_list_add(&desc->head, &probe_list); |
df854e41 | 106 | desc_added: |
8165c8da MD |
107 | |
108 | /* | |
109 | * fix the events awaiting probe load. | |
110 | */ | |
111 | for (i = 0; i < desc->nr_events; i++) { | |
df854e41 | 112 | ret = pending_probe_fix_events(desc->event_desc[i]); |
8165c8da MD |
113 | assert(!ret); |
114 | } | |
ce5aef0b | 115 | end: |
17dfb34b | 116 | ust_unlock(); |
ce5aef0b MD |
117 | return ret; |
118 | } | |
ce5aef0b MD |
119 | |
120 | void ltt_probe_unregister(struct lttng_probe_desc *desc) | |
121 | { | |
17dfb34b | 122 | ust_lock(); |
8d8a24c8 | 123 | cds_list_del(&desc->head); |
17dfb34b | 124 | ust_unlock(); |
ce5aef0b | 125 | } |
ce5aef0b | 126 | |
8165c8da MD |
127 | /* |
128 | * called with UST lock held. | |
129 | */ | |
ce5aef0b MD |
130 | const struct lttng_event_desc *ltt_event_get(const char *name) |
131 | { | |
132 | const struct lttng_event_desc *event; | |
ce5aef0b | 133 | |
ce5aef0b | 134 | event = find_event(name); |
ce5aef0b MD |
135 | if (!event) |
136 | return NULL; | |
ce5aef0b MD |
137 | return event; |
138 | } | |
ce5aef0b MD |
139 | |
140 | void ltt_event_put(const struct lttng_event_desc *event) | |
141 | { | |
ce5aef0b | 142 | } |
c8fcf224 MD |
143 | |
144 | void ltt_probes_prune_event_list(struct lttng_ust_tracepoint_list *list) | |
145 | { | |
146 | struct tp_list_entry *list_entry, *tmp; | |
147 | ||
148 | cds_list_for_each_entry_safe(list_entry, tmp, &list->head, head) { | |
149 | cds_list_del(&list_entry->head); | |
150 | free(list_entry); | |
151 | } | |
152 | } | |
153 | ||
154 | /* | |
155 | * called with UST lock held. | |
156 | */ | |
157 | int ltt_probes_get_event_list(struct lttng_ust_tracepoint_list *list) | |
158 | { | |
159 | struct lttng_probe_desc *probe_desc; | |
160 | int i; | |
161 | ||
162 | CDS_INIT_LIST_HEAD(&list->head); | |
163 | cds_list_for_each_entry(probe_desc, &probe_list, head) { | |
164 | for (i = 0; i < probe_desc->nr_events; i++) { | |
165 | struct tp_list_entry *list_entry; | |
166 | ||
167 | list_entry = zmalloc(sizeof(*list_entry)); | |
168 | if (!list_entry) | |
169 | goto err_nomem; | |
170 | cds_list_add(&list_entry->head, &list->head); | |
171 | strncpy(list_entry->tp.name, | |
172 | probe_desc->event_desc[i]->name, | |
173 | LTTNG_UST_SYM_NAME_LEN); | |
174 | list_entry->tp.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
175 | if (!probe_desc->event_desc[i]->loglevel) { | |
176 | list_entry->tp.loglevel[0] = '\0'; | |
177 | list_entry->tp.loglevel_value = 0; | |
178 | } else { | |
179 | strncpy(list_entry->tp.loglevel, | |
180 | (*probe_desc->event_desc[i]->loglevel)->identifier, | |
181 | LTTNG_UST_SYM_NAME_LEN); | |
182 | list_entry->tp.loglevel[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
183 | list_entry->tp.loglevel_value = | |
184 | (*probe_desc->event_desc[i]->loglevel)->value; | |
185 | } | |
186 | } | |
187 | } | |
188 | if (cds_list_empty(&list->head)) | |
189 | list->iter = NULL; | |
190 | else | |
191 | list->iter = | |
192 | cds_list_first_entry(&list->head, struct tp_list_entry, head); | |
193 | return 0; | |
194 | ||
195 | err_nomem: | |
196 | ltt_probes_prune_event_list(list); | |
197 | return -ENOMEM; | |
198 | } | |
199 | ||
200 | /* | |
201 | * Return current iteration position, advance internal iterator to next. | |
202 | * Return NULL if end of list. | |
203 | */ | |
204 | struct lttng_ust_tracepoint_iter * | |
205 | lttng_ust_tracepoint_list_get_iter_next(struct lttng_ust_tracepoint_list *list) | |
206 | { | |
207 | struct tp_list_entry *entry; | |
208 | ||
209 | if (!list->iter) | |
210 | return NULL; | |
211 | entry = list->iter; | |
212 | if (entry->head.next == &list->head) | |
213 | list->iter = NULL; | |
214 | else | |
215 | list->iter = cds_list_entry(entry->head.next, | |
216 | struct tp_list_entry, head); | |
217 | return &entry->tp; | |
218 | } | |
1f18504e MD |
219 | |
220 | /* | |
221 | * Get loglevel if the loglevel is present in the loglevel hash table. | |
222 | * Must be called with ust lock held. | |
223 | * Returns NULL if not present. | |
224 | */ | |
225 | struct loglevel_entry *get_loglevel(const char *name) | |
226 | { | |
227 | struct cds_hlist_head *head; | |
228 | struct cds_hlist_node *node; | |
229 | struct loglevel_entry *e; | |
230 | uint32_t hash = jhash(name, strlen(name), 0); | |
231 | ||
232 | head = &loglevel_table[hash & (LOGLEVEL_TABLE_SIZE - 1)]; | |
233 | cds_hlist_for_each_entry(e, node, head, hlist) { | |
234 | if (!strcmp(name, e->name)) | |
235 | return e; | |
236 | } | |
237 | return NULL; | |
238 | } | |
239 | ||
48740cab MD |
240 | struct loglevel_entry *get_loglevel_value(int64_t value) |
241 | { | |
242 | char name[LTTNG_UST_SYM_NAME_LEN]; | |
243 | int ret; | |
244 | ||
245 | ret = snprintf(name, LTTNG_UST_SYM_NAME_LEN, "%lld", (long long) value); | |
246 | if (ret < 0) | |
247 | return NULL; | |
248 | return get_loglevel(name); | |
249 | } | |
250 | ||
1f18504e MD |
251 | /* |
252 | * marshall all probes/all events and create those that fit the | |
253 | * loglevel. Add them to the events list as created. | |
254 | */ | |
255 | static | |
574a6217 MD |
256 | void _probes_create_loglevel_events(struct loglevel_entry *entry, |
257 | struct session_loglevel *loglevel) | |
1f18504e MD |
258 | { |
259 | struct lttng_probe_desc *probe_desc; | |
7ee3cc56 | 260 | struct lttng_ust_event event_param; |
1f18504e MD |
261 | int i; |
262 | ||
263 | cds_list_for_each_entry(probe_desc, &probe_list, head) { | |
264 | for (i = 0; i < probe_desc->nr_events; i++) { | |
265 | const struct tracepoint_loglevel_entry *ev_ll; | |
7ee3cc56 | 266 | const struct lttng_event_desc *event_desc; |
5e87eb4a | 267 | int match = 0; |
1f18504e | 268 | |
7ee3cc56 MD |
269 | event_desc = probe_desc->event_desc[i]; |
270 | if (!(event_desc->loglevel)) | |
1f18504e | 271 | continue; |
7ee3cc56 | 272 | ev_ll = *event_desc->loglevel; |
3431ca3e | 273 | if (isdigit(entry->name[0])) { |
48740cab MD |
274 | if (atoll(entry->name) == ev_ll->value) { |
275 | match = 1; | |
276 | } | |
277 | } else if (!strcmp(ev_ll->identifier, entry->name)) { | |
278 | match = 1; | |
279 | } | |
280 | ||
281 | if (match) { | |
1f18504e MD |
282 | struct ltt_event *ev; |
283 | int ret; | |
284 | ||
7ee3cc56 MD |
285 | memcpy(&event_param, &loglevel->event_param, |
286 | sizeof(event_param)); | |
287 | memcpy(event_param.name, | |
288 | event_desc->name, | |
289 | sizeof(event_param.name)); | |
1f18504e MD |
290 | /* create event */ |
291 | ret = ltt_event_create(loglevel->chan, | |
7ee3cc56 | 292 | &event_param, NULL, |
1f18504e | 293 | &ev); |
7ee3cc56 MD |
294 | if (ret) { |
295 | DBG("Error creating event"); | |
1f18504e | 296 | continue; |
7ee3cc56 | 297 | } |
1f18504e MD |
298 | cds_list_add(&ev->loglevel_list, |
299 | &loglevel->events); | |
300 | } | |
1f18504e MD |
301 | } |
302 | } | |
303 | } | |
304 | ||
305 | /* | |
306 | * Add the loglevel to the loglevel hash table. Must be called with | |
307 | * ust lock held. | |
308 | */ | |
574a6217 | 309 | struct session_loglevel *add_loglevel(const char *name, |
1f18504e MD |
310 | struct ltt_channel *chan, |
311 | struct lttng_ust_event *event_param) | |
312 | { | |
313 | struct cds_hlist_head *head; | |
314 | struct cds_hlist_node *node; | |
315 | struct loglevel_entry *e; | |
574a6217 | 316 | struct session_loglevel *sl; |
1f18504e MD |
317 | size_t name_len = strlen(name) + 1; |
318 | uint32_t hash = jhash(name, name_len-1, 0); | |
574a6217 | 319 | int found = 0; |
1f18504e | 320 | |
574a6217 | 321 | /* loglevel entry */ |
1f18504e MD |
322 | head = &loglevel_table[hash & (LOGLEVEL_TABLE_SIZE - 1)]; |
323 | cds_hlist_for_each_entry(e, node, head, hlist) { | |
324 | if (!strcmp(name, e->name)) { | |
574a6217 MD |
325 | found = 1; |
326 | break; | |
327 | } | |
328 | } | |
329 | ||
330 | if (!found) { | |
331 | /* | |
332 | * Using zmalloc here to allocate a variable length element. Could | |
333 | * cause some memory fragmentation if overused. | |
334 | */ | |
335 | e = zmalloc(sizeof(struct loglevel_entry) + name_len); | |
336 | if (!e) | |
337 | return ERR_PTR(-ENOMEM); | |
338 | memcpy(&e->name[0], name, name_len); | |
339 | cds_hlist_add_head(&e->hlist, head); | |
d5201d38 | 340 | CDS_INIT_LIST_HEAD(&e->session_list); |
574a6217 MD |
341 | } |
342 | ||
343 | /* session loglevel */ | |
344 | cds_list_for_each_entry(sl, &e->session_list, session_list) { | |
345 | if (chan == sl->chan) { | |
346 | DBG("loglevel %s busy for this channel", name); | |
1f18504e MD |
347 | return ERR_PTR(-EEXIST); /* Already there */ |
348 | } | |
349 | } | |
574a6217 MD |
350 | sl = zmalloc(sizeof(struct session_loglevel)); |
351 | if (!sl) | |
1f18504e | 352 | return ERR_PTR(-ENOMEM); |
574a6217 MD |
353 | sl->chan = chan; |
354 | sl->enabled = 1; | |
355 | memcpy(&sl->event_param, event_param, sizeof(sl->event_param)); | |
d5201d38 | 356 | sl->event_param.instrumentation = LTTNG_UST_TRACEPOINT; |
574a6217 MD |
357 | CDS_INIT_LIST_HEAD(&sl->events); |
358 | cds_list_add(&sl->list, &chan->session->loglevels); | |
359 | cds_list_add(&sl->session_list, &e->session_list); | |
2981744d | 360 | sl->entry = e; |
574a6217 MD |
361 | _probes_create_loglevel_events(e, sl); |
362 | return sl; | |
1f18504e MD |
363 | } |
364 | ||
365 | /* | |
366 | * Remove the loglevel from the loglevel hash table. Must be called with | |
367 | * ust_lock held. Only called at session teardown. | |
368 | */ | |
574a6217 | 369 | void _remove_loglevel(struct session_loglevel *loglevel) |
1f18504e MD |
370 | { |
371 | struct ltt_event *ev, *tmp; | |
372 | ||
373 | /* | |
374 | * Just remove the events owned (for enable/disable) by this | |
375 | * loglevel from the list. The session teardown will take care | |
376 | * of freeing the event memory. | |
377 | */ | |
378 | cds_list_for_each_entry_safe(ev, tmp, &loglevel->events, list) { | |
379 | cds_list_del(&ev->list); | |
380 | } | |
574a6217 | 381 | cds_list_del(&loglevel->session_list); |
1f18504e | 382 | cds_list_del(&loglevel->list); |
574a6217 MD |
383 | if (cds_list_empty(&loglevel->entry->session_list)) { |
384 | cds_hlist_del(&loglevel->entry->hlist); | |
385 | free(loglevel->entry); | |
386 | } | |
1f18504e MD |
387 | free(loglevel); |
388 | } | |
389 | ||
574a6217 | 390 | int ltt_loglevel_enable(struct session_loglevel *loglevel) |
1f18504e MD |
391 | { |
392 | struct ltt_event *ev; | |
393 | int ret; | |
394 | ||
395 | if (loglevel->enabled) | |
396 | return -EEXIST; | |
397 | cds_list_for_each_entry(ev, &loglevel->events, list) { | |
398 | ret = ltt_event_enable(ev); | |
399 | if (ret) { | |
400 | DBG("Error: enable error.\n"); | |
401 | return ret; | |
402 | } | |
403 | } | |
404 | loglevel->enabled = 1; | |
405 | return 0; | |
406 | } | |
407 | ||
574a6217 | 408 | int ltt_loglevel_disable(struct session_loglevel *loglevel) |
1f18504e MD |
409 | { |
410 | struct ltt_event *ev; | |
411 | int ret; | |
412 | ||
413 | if (!loglevel->enabled) | |
414 | return -EEXIST; | |
415 | cds_list_for_each_entry(ev, &loglevel->events, list) { | |
416 | ret = ltt_event_disable(ev); | |
417 | if (ret) { | |
418 | DBG("Error: disable error.\n"); | |
419 | return ret; | |
420 | } | |
421 | } | |
422 | loglevel->enabled = 0; | |
423 | return 0; | |
424 | } | |
e6c12e3d MD |
425 | |
426 | /* WILDCARDS */ | |
427 | ||
428 | /* | |
429 | * Return wildcard for a given event name if the event name match the | |
430 | * one of the wildcards. | |
431 | * Must be called with ust lock held. | |
432 | * Returns NULL if not present. | |
433 | */ | |
434 | struct wildcard_entry *match_wildcard(const char *name) | |
435 | { | |
436 | struct wildcard_entry *e; | |
437 | ||
438 | cds_list_for_each_entry(e, &wildcard_list, list) { | |
439 | /* If only contain '*' */ | |
440 | if (strlen(e->name) == 1) | |
441 | return e; | |
442 | /* Compare excluding final '*' */ | |
443 | if (!strncmp(name, e->name, strlen(e->name) - 1)) | |
444 | return e; | |
445 | } | |
446 | return NULL; | |
447 | } | |
448 | ||
449 | /* | |
450 | * marshall all probes/all events and create those that fit the | |
451 | * wildcard. Add them to the events list as created. | |
452 | */ | |
453 | static | |
454 | void _probes_create_wildcard_events(struct wildcard_entry *entry, | |
455 | struct session_wildcard *wildcard) | |
456 | { | |
457 | struct lttng_probe_desc *probe_desc; | |
458 | struct lttng_ust_event event_param; | |
459 | int i; | |
460 | ||
461 | cds_list_for_each_entry(probe_desc, &probe_list, head) { | |
462 | for (i = 0; i < probe_desc->nr_events; i++) { | |
463 | const struct lttng_event_desc *event_desc; | |
464 | int match = 0; | |
465 | ||
466 | event_desc = probe_desc->event_desc[i]; | |
467 | /* compare excluding final '*' */ | |
468 | assert(strlen(entry->name) > 0); | |
469 | if (strcmp(event_desc->name, "lttng_ust:metadata") | |
470 | && (strlen(entry->name) == 1 | |
471 | || !strncmp(event_desc->name, entry->name, | |
472 | strlen(entry->name) - 1))) { | |
473 | match = 1; | |
474 | } | |
475 | if (match) { | |
476 | struct ltt_event *ev; | |
477 | int ret; | |
478 | ||
479 | memcpy(&event_param, &wildcard->event_param, | |
480 | sizeof(event_param)); | |
481 | memcpy(event_param.name, | |
482 | event_desc->name, | |
483 | sizeof(event_param.name)); | |
484 | /* create event */ | |
485 | ret = ltt_event_create(wildcard->chan, | |
486 | &event_param, NULL, | |
487 | &ev); | |
488 | if (ret) { | |
489 | DBG("Error creating event"); | |
490 | continue; | |
491 | } | |
492 | cds_list_add(&ev->wildcard_list, | |
493 | &wildcard->events); | |
494 | } | |
495 | } | |
496 | } | |
497 | } | |
498 | ||
499 | /* | |
500 | * Add the wildcard to the wildcard hash table. Must be called with | |
501 | * ust lock held. | |
502 | */ | |
503 | struct session_wildcard *add_wildcard(const char *name, | |
504 | struct ltt_channel *chan, | |
505 | struct lttng_ust_event *event_param) | |
506 | { | |
507 | struct wildcard_entry *e; | |
508 | struct session_wildcard *sw; | |
509 | size_t name_len = strlen(name) + 1; | |
510 | int found = 0; | |
511 | ||
512 | /* wildcard entry */ | |
513 | cds_list_for_each_entry(e, &wildcard_list, list) { | |
514 | if (!strcmp(name, e->name)) { | |
515 | found = 1; | |
516 | break; | |
517 | } | |
518 | } | |
519 | ||
520 | if (!found) { | |
521 | /* | |
522 | * Using zmalloc here to allocate a variable length element. Could | |
523 | * cause some memory fragmentation if overused. | |
524 | */ | |
525 | e = zmalloc(sizeof(struct wildcard_entry) + name_len); | |
526 | if (!e) | |
527 | return ERR_PTR(-ENOMEM); | |
528 | memcpy(&e->name[0], name, name_len); | |
529 | cds_list_add(&e->list, &wildcard_list); | |
530 | CDS_INIT_LIST_HEAD(&e->session_list); | |
531 | } | |
532 | ||
533 | /* session wildcard */ | |
534 | cds_list_for_each_entry(sw, &e->session_list, session_list) { | |
535 | if (chan == sw->chan) { | |
536 | DBG("wildcard %s busy for this channel", name); | |
537 | return ERR_PTR(-EEXIST); /* Already there */ | |
538 | } | |
539 | } | |
540 | sw = zmalloc(sizeof(struct session_wildcard)); | |
541 | if (!sw) | |
542 | return ERR_PTR(-ENOMEM); | |
543 | sw->chan = chan; | |
544 | sw->enabled = 1; | |
545 | memcpy(&sw->event_param, event_param, sizeof(sw->event_param)); | |
546 | sw->event_param.instrumentation = LTTNG_UST_TRACEPOINT; | |
547 | CDS_INIT_LIST_HEAD(&sw->events); | |
548 | cds_list_add(&sw->list, &chan->session->wildcards); | |
549 | cds_list_add(&sw->session_list, &e->session_list); | |
550 | sw->entry = e; | |
551 | _probes_create_wildcard_events(e, sw); | |
552 | return sw; | |
553 | } | |
554 | ||
555 | /* | |
556 | * Remove the wildcard from the wildcard hash table. Must be called with | |
557 | * ust_lock held. Only called at session teardown. | |
558 | */ | |
559 | void _remove_wildcard(struct session_wildcard *wildcard) | |
560 | { | |
561 | struct ltt_event *ev, *tmp; | |
562 | ||
563 | /* | |
564 | * Just remove the events owned (for enable/disable) by this | |
565 | * wildcard from the list. The session teardown will take care | |
566 | * of freeing the event memory. | |
567 | */ | |
568 | cds_list_for_each_entry_safe(ev, tmp, &wildcard->events, list) { | |
569 | cds_list_del(&ev->list); | |
570 | } | |
571 | cds_list_del(&wildcard->session_list); | |
572 | cds_list_del(&wildcard->list); | |
573 | if (cds_list_empty(&wildcard->entry->session_list)) { | |
574 | cds_list_del(&wildcard->entry->list); | |
575 | free(wildcard->entry); | |
576 | } | |
577 | free(wildcard); | |
578 | } | |
579 | ||
580 | int ltt_wildcard_enable(struct session_wildcard *wildcard) | |
581 | { | |
582 | struct ltt_event *ev; | |
583 | int ret; | |
584 | ||
585 | if (wildcard->enabled) | |
586 | return -EEXIST; | |
587 | cds_list_for_each_entry(ev, &wildcard->events, list) { | |
588 | ret = ltt_event_enable(ev); | |
589 | if (ret) { | |
590 | DBG("Error: enable error.\n"); | |
591 | return ret; | |
592 | } | |
593 | } | |
594 | wildcard->enabled = 1; | |
595 | return 0; | |
596 | } | |
597 | ||
598 | int ltt_wildcard_disable(struct session_wildcard *wildcard) | |
599 | { | |
600 | struct ltt_event *ev; | |
601 | int ret; | |
602 | ||
603 | if (!wildcard->enabled) | |
604 | return -EEXIST; | |
605 | cds_list_for_each_entry(ev, &wildcard->events, list) { | |
606 | ret = ltt_event_disable(ev); | |
607 | if (ret) { | |
608 | DBG("Error: disable error.\n"); | |
609 | return ret; | |
610 | } | |
611 | } | |
612 | wildcard->enabled = 0; | |
613 | return 0; | |
614 | } |