Commit | Line | Data |
---|---|---|
97ee3a89 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
97ee3a89 | 7 | * |
d14d33bf AM |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
97ee3a89 | 12 | * |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
97ee3a89 DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <unistd.h> | |
23 | ||
990570ed DG |
24 | #include <common/common.h> |
25 | #include <common/defaults.h> | |
97ee3a89 | 26 | |
7972aab2 | 27 | #include "buffer-registry.h" |
97ee3a89 DG |
28 | #include "trace-ust.h" |
29 | ||
025faf73 DG |
30 | /* |
31 | * Match function for the events hash table lookup. | |
32 | * | |
33 | * Matches by name only. Used by the disable command. | |
34 | */ | |
18eace3b DG |
35 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
36 | const void *_key) | |
37 | { | |
38 | struct ltt_ust_event *event; | |
39 | const char *name; | |
40 | ||
41 | assert(node); | |
42 | assert(_key); | |
43 | ||
44 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
45 | name = _key; | |
46 | ||
47 | /* Event name */ | |
48 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
49 | goto no_match; | |
50 | } | |
51 | ||
025faf73 | 52 | /* Match */ |
18eace3b DG |
53 | return 1; |
54 | ||
55 | no_match: | |
56 | return 0; | |
57 | } | |
58 | ||
025faf73 DG |
59 | /* |
60 | * Match function for the hash table lookup. | |
61 | * | |
62 | * It matches an ust event based on three attributes which are the event name, | |
63 | * the filter bytecode and the loglevel. | |
64 | */ | |
18eace3b DG |
65 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
66 | { | |
67 | struct ltt_ust_event *event; | |
68 | const struct ltt_ust_ht_key *key; | |
69 | ||
70 | assert(node); | |
71 | assert(_key); | |
72 | ||
73 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
74 | key = _key; | |
75 | ||
76 | /* Match the 3 elements of the key: name, filter and loglevel. */ | |
77 | ||
78 | /* Event name */ | |
79 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
80 | goto no_match; |
81 | } | |
82 | ||
83 | /* Event loglevel. */ | |
84 | if (event->attr.loglevel != key->loglevel) { | |
025faf73 DG |
85 | if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL |
86 | && key->loglevel == 0 && event->attr.loglevel == -1) { | |
18eace3b | 87 | /* |
025faf73 DG |
88 | * Match is accepted. This is because on event creation, the |
89 | * loglevel is set to -1 if the event loglevel type is ALL so 0 and | |
90 | * -1 are accepted for this loglevel type since 0 is the one set by | |
91 | * the API when receiving an enable event. | |
18eace3b DG |
92 | */ |
93 | } else { | |
18eace3b DG |
94 | goto no_match; |
95 | } | |
96 | } | |
97 | ||
98 | /* Only one of the filters is NULL, fail. */ | |
99 | if ((key->filter && !event->filter) || (!key->filter && event->filter)) { | |
18eace3b DG |
100 | goto no_match; |
101 | } | |
102 | ||
025faf73 DG |
103 | if (key->filter && event->filter) { |
104 | /* Both filters exists, check length followed by the bytecode. */ | |
105 | if (event->filter->len != key->filter->len || | |
106 | memcmp(event->filter->data, key->filter->data, | |
107 | event->filter->len) != 0) { | |
108 | goto no_match; | |
109 | } | |
18eace3b DG |
110 | } |
111 | ||
025faf73 DG |
112 | /* Match. */ |
113 | return 1; | |
18eace3b DG |
114 | |
115 | no_match: | |
116 | return 0; | |
18eace3b DG |
117 | } |
118 | ||
0177d773 | 119 | /* |
2223c96f DG |
120 | * Find the channel in the hashtable and return channel pointer. RCU read side |
121 | * lock MUST be acquired before calling this. | |
0177d773 | 122 | */ |
bec39940 | 123 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 124 | char *name) |
0177d773 | 125 | { |
bec39940 DG |
126 | struct lttng_ht_node_str *node; |
127 | struct lttng_ht_iter iter; | |
0177d773 | 128 | |
bec39940 DG |
129 | lttng_ht_lookup(ht, (void *)name, &iter); |
130 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 131 | if (node == NULL) { |
44d3bd01 DG |
132 | goto error; |
133 | } | |
134 | ||
f6a9efaa | 135 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 136 | |
f6a9efaa | 137 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
138 | |
139 | error: | |
f6a9efaa | 140 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
141 | return NULL; |
142 | } | |
143 | ||
144 | /* | |
2223c96f DG |
145 | * Find the event in the hashtable and return event pointer. RCU read side lock |
146 | * MUST be acquired before calling this. | |
97ee3a89 | 147 | */ |
18eace3b DG |
148 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
149 | char *name, struct lttng_filter_bytecode *filter, int loglevel) | |
97ee3a89 | 150 | { |
bec39940 DG |
151 | struct lttng_ht_node_str *node; |
152 | struct lttng_ht_iter iter; | |
18eace3b | 153 | struct ltt_ust_ht_key key; |
97ee3a89 | 154 | |
18eace3b DG |
155 | assert(name); |
156 | assert(ht); | |
157 | ||
158 | key.name = name; | |
159 | key.filter = filter; | |
160 | key.loglevel = loglevel; | |
161 | ||
18eace3b DG |
162 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
163 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 164 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 165 | if (node == NULL) { |
97ee3a89 DG |
166 | goto error; |
167 | } | |
168 | ||
18eace3b | 169 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
170 | |
171 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
172 | |
173 | error: | |
18eace3b | 174 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
175 | return NULL; |
176 | } | |
177 | ||
178 | /* | |
179 | * Allocate and initialize a ust session data structure. | |
180 | * | |
181 | * Return pointer to structure or NULL. | |
182 | */ | |
dec56f6c | 183 | struct ltt_ust_session *trace_ust_create_session(unsigned int session_id) |
97ee3a89 DG |
184 | { |
185 | struct ltt_ust_session *lus; | |
186 | ||
187 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 188 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 189 | if (lus == NULL) { |
ba7f0ae5 | 190 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
191 | goto error; |
192 | } | |
193 | ||
194 | /* Init data structure */ | |
a991f516 | 195 | lus->id = session_id; |
36dc12cc | 196 | lus->start_trace = 0; |
97ee3a89 | 197 | |
7972aab2 DG |
198 | /* |
199 | * Default buffer type. This can be changed through an enable channel | |
200 | * requesting a different type. Note that this can only be changed once | |
201 | * during the session lifetime which is at the first enable channel and | |
202 | * only before start. The flag buffer_type_changed indicates the status. | |
203 | */ | |
204 | lus->buffer_type = LTTNG_BUFFER_PER_PID; | |
205 | /* Once set to 1, the buffer_type is immutable for the session. */ | |
206 | lus->buffer_type_changed = 0; | |
207 | /* Init it in case it get used after allocation. */ | |
208 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
209 | |
210 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 211 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
44d3bd01 | 212 | |
00e2e675 DG |
213 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
214 | if (lus->consumer == NULL) { | |
09a90bcd | 215 | goto error_consumer; |
00e2e675 DG |
216 | } |
217 | ||
218 | /* | |
219 | * The tmp_consumer stays NULL until a set_consumer_uri command is | |
220 | * executed. At this point, the consumer should be nullify until an | |
221 | * enable_consumer command. This assignment is symbolic since we've zmalloc | |
222 | * the struct. | |
223 | */ | |
224 | lus->tmp_consumer = NULL; | |
225 | ||
44d3bd01 DG |
226 | DBG2("UST trace session create successful"); |
227 | ||
97ee3a89 DG |
228 | return lus; |
229 | ||
09a90bcd | 230 | error_consumer: |
a2c0da86 | 231 | lttng_ht_destroy(lus->domain_global.channels); |
44844c29 | 232 | free(lus); |
97ee3a89 DG |
233 | error: |
234 | return NULL; | |
235 | } | |
236 | ||
237 | /* | |
238 | * Allocate and initialize a ust channel data structure. | |
239 | * | |
240 | * Return pointer to structure or NULL. | |
241 | */ | |
dec56f6c | 242 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan) |
97ee3a89 | 243 | { |
97ee3a89 DG |
244 | struct ltt_ust_channel *luc; |
245 | ||
0525e9ae | 246 | assert(chan); |
0525e9ae | 247 | |
37357452 | 248 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 249 | if (luc == NULL) { |
df0f840b | 250 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
251 | goto error; |
252 | } | |
253 | ||
44d3bd01 | 254 | /* Copy UST channel attributes */ |
48842b30 DG |
255 | luc->attr.overwrite = chan->attr.overwrite; |
256 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
257 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
258 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
259 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 260 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
261 | |
262 | /* Translate to UST output enum */ | |
263 | switch (luc->attr.output) { | |
264 | default: | |
265 | luc->attr.output = LTTNG_UST_MMAP; | |
266 | break; | |
97ee3a89 | 267 | } |
97ee3a89 | 268 | |
97ee3a89 | 269 | /* Copy channel name */ |
0a1459bb | 270 | strncpy(luc->name, chan->name, sizeof(luc->name)); |
97ee3a89 DG |
271 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
272 | ||
f6a9efaa | 273 | /* Init node */ |
bec39940 | 274 | lttng_ht_node_init_str(&luc->node, luc->name); |
f6a9efaa | 275 | /* Alloc hash tables */ |
bec39940 DG |
276 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
277 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 278 | |
1624d5b7 JD |
279 | /* On-disk circular buffer parameters */ |
280 | luc->tracefile_size = chan->attr.tracefile_size; | |
281 | luc->tracefile_count = chan->attr.tracefile_count; | |
282 | ||
f6a9efaa DG |
283 | DBG2("Trace UST channel %s created", luc->name); |
284 | ||
97ee3a89 | 285 | error: |
7972aab2 | 286 | return luc; |
97ee3a89 DG |
287 | } |
288 | ||
289 | /* | |
290 | * Allocate and initialize a ust event. Set name and event type. | |
291 | * | |
292 | * Return pointer to structure or NULL. | |
293 | */ | |
025faf73 DG |
294 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
295 | struct lttng_filter_bytecode *filter) | |
97ee3a89 DG |
296 | { |
297 | struct ltt_ust_event *lue; | |
97ee3a89 | 298 | |
0525e9ae DG |
299 | assert(ev); |
300 | ||
37357452 | 301 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 302 | if (lue == NULL) { |
ba7f0ae5 | 303 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
304 | goto error; |
305 | } | |
306 | ||
307 | switch (ev->type) { | |
308 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 309 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
310 | break; |
311 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 312 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
313 | break; |
314 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 315 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
316 | break; |
317 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 318 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
319 | break; |
320 | default: | |
321 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 322 | goto error_free_event; |
97ee3a89 DG |
323 | } |
324 | ||
325 | /* Copy event name */ | |
44d3bd01 DG |
326 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
327 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 328 | |
0cda4f28 | 329 | switch (ev->loglevel_type) { |
8005f29a MD |
330 | case LTTNG_EVENT_LOGLEVEL_ALL: |
331 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 332 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 333 | break; |
8005f29a MD |
334 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
335 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 336 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
337 | break; |
338 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
339 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 340 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
341 | break; |
342 | default: | |
4431494b | 343 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
344 | goto error_free_event; |
345 | } | |
346 | ||
025faf73 DG |
347 | /* Same layout. */ |
348 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; | |
0cda4f28 | 349 | |
f6a9efaa | 350 | /* Init node */ |
bec39940 | 351 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 352 | |
300b8fd5 MD |
353 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
354 | lue->attr.name, lue->attr.loglevel_type, | |
355 | lue->attr.loglevel); | |
284d8f55 | 356 | |
97ee3a89 DG |
357 | return lue; |
358 | ||
44844c29 MD |
359 | error_free_event: |
360 | free(lue); | |
97ee3a89 DG |
361 | error: |
362 | return NULL; | |
363 | } | |
364 | ||
365 | /* | |
366 | * Allocate and initialize a ust metadata. | |
367 | * | |
368 | * Return pointer to structure or NULL. | |
369 | */ | |
370 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
371 | { | |
372 | int ret; | |
373 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 374 | |
0525e9ae DG |
375 | assert(path); |
376 | ||
3a009adb | 377 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 378 | if (lum == NULL) { |
df0f840b | 379 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
380 | goto error; |
381 | } | |
382 | ||
383 | /* Set default attributes */ | |
44d3bd01 | 384 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 385 | lum->attr.subbuf_size = default_get_metadata_subbuf_size(); |
44d3bd01 | 386 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
0a9c6494 DG |
387 | lum->attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; |
388 | lum->attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
d41f73b7 | 389 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 390 | |
97ee3a89 DG |
391 | lum->handle = -1; |
392 | /* Set metadata trace path */ | |
30079b6b | 393 | ret = snprintf(lum->pathname, PATH_MAX, "%s/" DEFAULT_METADATA_NAME, path); |
97ee3a89 | 394 | if (ret < 0) { |
df0f840b | 395 | PERROR("asprintf ust metadata"); |
44844c29 | 396 | goto error_free_metadata; |
97ee3a89 DG |
397 | } |
398 | ||
399 | return lum; | |
400 | ||
44844c29 MD |
401 | error_free_metadata: |
402 | free(lum); | |
97ee3a89 DG |
403 | error: |
404 | return NULL; | |
405 | } | |
406 | ||
55cc08a6 DG |
407 | /* |
408 | * Allocate and initialize an UST context. | |
409 | * | |
410 | * Return pointer to structure or NULL. | |
411 | */ | |
412 | struct ltt_ust_context *trace_ust_create_context( | |
413 | struct lttng_event_context *ctx) | |
414 | { | |
415 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
416 | enum lttng_ust_context_type utype; |
417 | ||
0525e9ae DG |
418 | assert(ctx); |
419 | ||
9197c5c4 MD |
420 | switch (ctx->ctx) { |
421 | case LTTNG_EVENT_CONTEXT_VTID: | |
422 | utype = LTTNG_UST_CONTEXT_VTID; | |
423 | break; | |
424 | case LTTNG_EVENT_CONTEXT_VPID: | |
425 | utype = LTTNG_UST_CONTEXT_VPID; | |
426 | break; | |
427 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
428 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
429 | break; | |
430 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
431 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
432 | break; | |
433 | default: | |
434 | ERR("Invalid UST context"); | |
435 | return NULL; | |
436 | } | |
55cc08a6 DG |
437 | |
438 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
439 | if (uctx == NULL) { | |
440 | PERROR("zmalloc ltt_ust_context"); | |
441 | goto error; | |
442 | } | |
443 | ||
9197c5c4 | 444 | uctx->ctx.ctx = utype; |
bec39940 | 445 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
446 | |
447 | return uctx; | |
448 | ||
449 | error: | |
450 | return NULL; | |
451 | } | |
452 | ||
f6a9efaa DG |
453 | /* |
454 | * RCU safe free context structure. | |
455 | */ | |
456 | static void destroy_context_rcu(struct rcu_head *head) | |
457 | { | |
bec39940 DG |
458 | struct lttng_ht_node_ulong *node = |
459 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
460 | struct ltt_ust_context *ctx = |
461 | caa_container_of(node, struct ltt_ust_context, node); | |
462 | ||
463 | free(ctx); | |
464 | } | |
465 | ||
466 | /* | |
467 | * Cleanup UST context hash table. | |
468 | */ | |
7bd39047 | 469 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
470 | { |
471 | int ret; | |
bec39940 DG |
472 | struct lttng_ht_node_ulong *node; |
473 | struct lttng_ht_iter iter; | |
f6a9efaa | 474 | |
0525e9ae DG |
475 | assert(ht); |
476 | ||
36b588ed | 477 | rcu_read_lock(); |
bec39940 DG |
478 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
479 | ret = lttng_ht_del(ht, &iter); | |
f6a9efaa DG |
480 | if (!ret) { |
481 | call_rcu(&node->head, destroy_context_rcu); | |
482 | } | |
f6a9efaa | 483 | } |
36b588ed | 484 | rcu_read_unlock(); |
ed52805d | 485 | |
bec39940 | 486 | lttng_ht_destroy(ht); |
f6a9efaa DG |
487 | } |
488 | ||
97ee3a89 DG |
489 | /* |
490 | * Cleanup ust event structure. | |
491 | */ | |
492 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
493 | { | |
0525e9ae DG |
494 | assert(event); |
495 | ||
f6a9efaa | 496 | DBG2("Trace destroy UST event %s", event->attr.name); |
53a80697 | 497 | free(event->filter); |
97ee3a89 DG |
498 | free(event); |
499 | } | |
500 | ||
f6a9efaa DG |
501 | /* |
502 | * URCU intermediate call to complete destroy event. | |
503 | */ | |
504 | static void destroy_event_rcu(struct rcu_head *head) | |
505 | { | |
bec39940 DG |
506 | struct lttng_ht_node_str *node = |
507 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
508 | struct ltt_ust_event *event = |
509 | caa_container_of(node, struct ltt_ust_event, node); | |
510 | ||
511 | trace_ust_destroy_event(event); | |
512 | } | |
513 | ||
284d8f55 DG |
514 | /* |
515 | * Cleanup UST events hashtable. | |
516 | */ | |
7bd39047 | 517 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
518 | { |
519 | int ret; | |
bec39940 DG |
520 | struct lttng_ht_node_str *node; |
521 | struct lttng_ht_iter iter; | |
ed52805d | 522 | |
0525e9ae DG |
523 | assert(events); |
524 | ||
36b588ed | 525 | rcu_read_lock(); |
bec39940 DG |
526 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
527 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
528 | assert(!ret); |
529 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 530 | } |
36b588ed | 531 | rcu_read_unlock(); |
ed52805d | 532 | |
bec39940 | 533 | lttng_ht_destroy(events); |
ed52805d DG |
534 | } |
535 | ||
97ee3a89 DG |
536 | /* |
537 | * Cleanup ust channel structure. | |
36b588ed MD |
538 | * |
539 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 540 | */ |
36b588ed | 541 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 542 | { |
0525e9ae DG |
543 | assert(channel); |
544 | ||
f6a9efaa | 545 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 546 | |
7bd39047 DG |
547 | /* Destroying all events of the channel */ |
548 | destroy_events(channel->events); | |
549 | /* Destroying all context of the channel */ | |
550 | destroy_contexts(channel->ctx); | |
97ee3a89 | 551 | |
97ee3a89 | 552 | free(channel); |
f6a9efaa DG |
553 | } |
554 | ||
555 | /* | |
556 | * URCU intermediate call to complete destroy channel. | |
557 | */ | |
558 | static void destroy_channel_rcu(struct rcu_head *head) | |
559 | { | |
bec39940 DG |
560 | struct lttng_ht_node_str *node = |
561 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
562 | struct ltt_ust_channel *channel = |
563 | caa_container_of(node, struct ltt_ust_channel, node); | |
564 | ||
36b588ed MD |
565 | _trace_ust_destroy_channel(channel); |
566 | } | |
567 | ||
568 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
569 | { | |
570 | call_rcu(&channel->node.head, destroy_channel_rcu); | |
97ee3a89 DG |
571 | } |
572 | ||
573 | /* | |
574 | * Cleanup ust metadata structure. | |
575 | */ | |
576 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
577 | { | |
0525e9ae DG |
578 | assert(metadata); |
579 | ||
abc9138a MD |
580 | if (!metadata->handle) { |
581 | return; | |
582 | } | |
f6a9efaa | 583 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
584 | free(metadata); |
585 | } | |
586 | ||
587 | /* | |
f6a9efaa | 588 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 589 | */ |
bec39940 | 590 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
591 | { |
592 | int ret; | |
bec39940 DG |
593 | struct lttng_ht_node_str *node; |
594 | struct lttng_ht_iter iter; | |
f6a9efaa | 595 | |
0525e9ae DG |
596 | assert(channels); |
597 | ||
24d1723f DG |
598 | rcu_read_lock(); |
599 | ||
bec39940 DG |
600 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
601 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
602 | assert(!ret); |
603 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 604 | } |
36b588ed | 605 | rcu_read_unlock(); |
ed52805d | 606 | |
bec39940 | 607 | lttng_ht_destroy(channels); |
f6a9efaa DG |
608 | } |
609 | ||
f6a9efaa DG |
610 | /* |
611 | * Cleanup UST global domain. | |
612 | */ | |
613 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
614 | { | |
0525e9ae DG |
615 | assert(dom); |
616 | ||
f6a9efaa DG |
617 | destroy_channels(dom->channels); |
618 | } | |
97ee3a89 | 619 | |
f6a9efaa DG |
620 | /* |
621 | * Cleanup ust session structure | |
36b588ed MD |
622 | * |
623 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
624 | */ |
625 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
626 | { | |
7972aab2 DG |
627 | struct buffer_reg_uid *reg, *sreg; |
628 | ||
0525e9ae | 629 | assert(session); |
97ee3a89 | 630 | |
fc4705fe | 631 | DBG2("Trace UST destroy session %u", session->id); |
f6a9efaa | 632 | |
f6a9efaa DG |
633 | /* Cleaning up UST domain */ |
634 | destroy_domain_global(&session->domain_global); | |
7972aab2 DG |
635 | |
636 | /* Cleanup UID buffer registry object(s). */ | |
637 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
638 | lnode) { | |
639 | cds_list_del(®->lnode); | |
640 | buffer_reg_uid_remove(reg); | |
641 | buffer_reg_uid_destroy(reg, session->consumer); | |
642 | } | |
44d3bd01 | 643 | |
3f8e211f DG |
644 | consumer_destroy_output(session->consumer); |
645 | consumer_destroy_output(session->tmp_consumer); | |
646 | ||
97ee3a89 DG |
647 | free(session); |
648 | } |