Add event exclusion data to ltt_ust_event structure
[lttng-tools.git] / src / bin / lttng-sessiond / trace-ust.c
CommitLineData
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 *
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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 *
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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>
d9bf3ca4 23#include <inttypes.h>
97ee3a89 24
990570ed
DG
25#include <common/common.h>
26#include <common/defaults.h>
97ee3a89 27
7972aab2 28#include "buffer-registry.h"
97ee3a89 29#include "trace-ust.h"
0b2dc8df 30#include "utils.h"
97ee3a89 31
025faf73
DG
32/*
33 * Match function for the events hash table lookup.
34 *
35 * Matches by name only. Used by the disable command.
36 */
18eace3b
DG
37int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node,
38 const void *_key)
39{
40 struct ltt_ust_event *event;
41 const char *name;
42
43 assert(node);
44 assert(_key);
45
46 event = caa_container_of(node, struct ltt_ust_event, node.node);
47 name = _key;
48
49 /* Event name */
50 if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) {
51 goto no_match;
52 }
53
025faf73 54 /* Match */
18eace3b
DG
55 return 1;
56
57no_match:
58 return 0;
59}
60
025faf73
DG
61/*
62 * Match function for the hash table lookup.
63 *
64 * It matches an ust event based on three attributes which are the event name,
65 * the filter bytecode and the loglevel.
66 */
18eace3b
DG
67int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key)
68{
69 struct ltt_ust_event *event;
70 const struct ltt_ust_ht_key *key;
71
72 assert(node);
73 assert(_key);
74
75 event = caa_container_of(node, struct ltt_ust_event, node.node);
76 key = _key;
77
78 /* Match the 3 elements of the key: name, filter and loglevel. */
79
80 /* Event name */
81 if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) {
18eace3b
DG
82 goto no_match;
83 }
84
85 /* Event loglevel. */
86 if (event->attr.loglevel != key->loglevel) {
025faf73
DG
87 if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL
88 && key->loglevel == 0 && event->attr.loglevel == -1) {
18eace3b 89 /*
025faf73
DG
90 * Match is accepted. This is because on event creation, the
91 * loglevel is set to -1 if the event loglevel type is ALL so 0 and
92 * -1 are accepted for this loglevel type since 0 is the one set by
93 * the API when receiving an enable event.
18eace3b
DG
94 */
95 } else {
18eace3b
DG
96 goto no_match;
97 }
98 }
99
100 /* Only one of the filters is NULL, fail. */
101 if ((key->filter && !event->filter) || (!key->filter && event->filter)) {
18eace3b
DG
102 goto no_match;
103 }
104
025faf73
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105 if (key->filter && event->filter) {
106 /* Both filters exists, check length followed by the bytecode. */
107 if (event->filter->len != key->filter->len ||
108 memcmp(event->filter->data, key->filter->data,
109 event->filter->len) != 0) {
110 goto no_match;
111 }
18eace3b
DG
112 }
113
025faf73
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114 /* Match. */
115 return 1;
18eace3b
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116
117no_match:
118 return 0;
18eace3b
DG
119}
120
0177d773 121/*
2223c96f
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122 * Find the channel in the hashtable and return channel pointer. RCU read side
123 * lock MUST be acquired before calling this.
0177d773 124 */
bec39940 125struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht,
f6a9efaa 126 char *name)
0177d773 127{
bec39940
DG
128 struct lttng_ht_node_str *node;
129 struct lttng_ht_iter iter;
0177d773 130
85076754
MD
131 /*
132 * If we receive an empty string for channel name, it means the
133 * default channel name is requested.
134 */
135 if (name[0] == '\0')
136 name = DEFAULT_CHANNEL_NAME;
137
bec39940
DG
138 lttng_ht_lookup(ht, (void *)name, &iter);
139 node = lttng_ht_iter_get_node_str(&iter);
f6a9efaa 140 if (node == NULL) {
44d3bd01
DG
141 goto error;
142 }
143
f6a9efaa 144 DBG2("Trace UST channel %s found by name", name);
0177d773 145
f6a9efaa 146 return caa_container_of(node, struct ltt_ust_channel, node);
97ee3a89
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147
148error:
f6a9efaa 149 DBG2("Trace UST channel %s not found by name", name);
97ee3a89
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150 return NULL;
151}
152
153/*
2223c96f
DG
154 * Find the event in the hashtable and return event pointer. RCU read side lock
155 * MUST be acquired before calling this.
97ee3a89 156 */
18eace3b
DG
157struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht,
158 char *name, struct lttng_filter_bytecode *filter, int loglevel)
97ee3a89 159{
bec39940
DG
160 struct lttng_ht_node_str *node;
161 struct lttng_ht_iter iter;
18eace3b 162 struct ltt_ust_ht_key key;
97ee3a89 163
18eace3b
DG
164 assert(name);
165 assert(ht);
166
167 key.name = name;
168 key.filter = filter;
169 key.loglevel = loglevel;
170
18eace3b
DG
171 cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed),
172 trace_ust_ht_match_event, &key, &iter.iter);
bec39940 173 node = lttng_ht_iter_get_node_str(&iter);
f6a9efaa 174 if (node == NULL) {
97ee3a89
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175 goto error;
176 }
177
18eace3b 178 DBG2("Trace UST event %s found", key.name);
f6a9efaa
DG
179
180 return caa_container_of(node, struct ltt_ust_event, node);
97ee3a89
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181
182error:
18eace3b 183 DBG2("Trace UST event %s NOT found", key.name);
97ee3a89
DG
184 return NULL;
185}
186
187/*
188 * Allocate and initialize a ust session data structure.
189 *
190 * Return pointer to structure or NULL.
191 */
d9bf3ca4 192struct ltt_ust_session *trace_ust_create_session(uint64_t session_id)
97ee3a89 193{
0475c50c 194 int ret;
97ee3a89
DG
195 struct ltt_ust_session *lus;
196
197 /* Allocate a new ltt ust session */
ba7f0ae5 198 lus = zmalloc(sizeof(struct ltt_ust_session));
97ee3a89 199 if (lus == NULL) {
ba7f0ae5 200 PERROR("create ust session zmalloc");
97ee3a89
DG
201 goto error;
202 }
203
204 /* Init data structure */
a991f516 205 lus->id = session_id;
36dc12cc 206 lus->start_trace = 0;
97ee3a89 207
7972aab2
DG
208 /*
209 * Default buffer type. This can be changed through an enable channel
210 * requesting a different type. Note that this can only be changed once
211 * during the session lifetime which is at the first enable channel and
212 * only before start. The flag buffer_type_changed indicates the status.
213 */
8692d4e5 214 lus->buffer_type = LTTNG_BUFFER_PER_UID;
7972aab2
DG
215 /* Once set to 1, the buffer_type is immutable for the session. */
216 lus->buffer_type_changed = 0;
217 /* Init it in case it get used after allocation. */
218 CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list);
f6a9efaa
DG
219
220 /* Alloc UST global domain channels' HT */
bec39940 221 lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
0475c50c
DG
222 ret = jul_init_domain(&lus->domain_jul);
223 if (ret < 0) {
224 goto error_consumer;
225 }
44d3bd01 226
00e2e675
DG
227 lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL);
228 if (lus->consumer == NULL) {
09a90bcd 229 goto error_consumer;
00e2e675
DG
230 }
231
232 /*
233 * The tmp_consumer stays NULL until a set_consumer_uri command is
234 * executed. At this point, the consumer should be nullify until an
235 * enable_consumer command. This assignment is symbolic since we've zmalloc
236 * the struct.
237 */
238 lus->tmp_consumer = NULL;
239
44d3bd01
DG
240 DBG2("UST trace session create successful");
241
97ee3a89
DG
242 return lus;
243
09a90bcd 244error_consumer:
0b2dc8df 245 ht_cleanup_push(lus->domain_global.channels);
0475c50c 246 jul_destroy_domain(&lus->domain_jul);
44844c29 247 free(lus);
97ee3a89
DG
248error:
249 return NULL;
250}
251
252/*
253 * Allocate and initialize a ust channel data structure.
254 *
255 * Return pointer to structure or NULL.
256 */
dec56f6c 257struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan)
97ee3a89 258{
97ee3a89
DG
259 struct ltt_ust_channel *luc;
260
0525e9ae 261 assert(chan);
0525e9ae 262
37357452 263 luc = zmalloc(sizeof(struct ltt_ust_channel));
97ee3a89 264 if (luc == NULL) {
df0f840b 265 PERROR("ltt_ust_channel zmalloc");
97ee3a89
DG
266 goto error;
267 }
268
44d3bd01 269 /* Copy UST channel attributes */
48842b30
DG
270 luc->attr.overwrite = chan->attr.overwrite;
271 luc->attr.subbuf_size = chan->attr.subbuf_size;
272 luc->attr.num_subbuf = chan->attr.num_subbuf;
273 luc->attr.switch_timer_interval = chan->attr.switch_timer_interval;
274 luc->attr.read_timer_interval = chan->attr.read_timer_interval;
6775595e 275 luc->attr.output = (enum lttng_ust_output) chan->attr.output;
44d3bd01
DG
276
277 /* Translate to UST output enum */
278 switch (luc->attr.output) {
279 default:
280 luc->attr.output = LTTNG_UST_MMAP;
281 break;
97ee3a89 282 }
97ee3a89 283
85076754
MD
284 /*
285 * If we receive an empty string for channel name, it means the
286 * default channel name is requested.
287 */
288 if (chan->name[0] == '\0') {
289 strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name));
290 } else {
291 /* Copy channel name */
292 strncpy(luc->name, chan->name, sizeof(luc->name));
293 }
97ee3a89
DG
294 luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
295
f6a9efaa 296 /* Init node */
bec39940 297 lttng_ht_node_init_str(&luc->node, luc->name);
31746f93
DG
298 CDS_INIT_LIST_HEAD(&luc->ctx_list);
299
f6a9efaa 300 /* Alloc hash tables */
bec39940
DG
301 luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING);
302 luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG);
f6a9efaa 303
1624d5b7
JD
304 /* On-disk circular buffer parameters */
305 luc->tracefile_size = chan->attr.tracefile_size;
306 luc->tracefile_count = chan->attr.tracefile_count;
307
f6a9efaa
DG
308 DBG2("Trace UST channel %s created", luc->name);
309
97ee3a89 310error:
7972aab2 311 return luc;
97ee3a89
DG
312}
313
314/*
315 * Allocate and initialize a ust event. Set name and event type.
316 *
317 * Return pointer to structure or NULL.
318 */
025faf73
DG
319struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev,
320 struct lttng_filter_bytecode *filter)
97ee3a89
DG
321{
322 struct ltt_ust_event *lue;
97ee3a89 323
0525e9ae
DG
324 assert(ev);
325
37357452 326 lue = zmalloc(sizeof(struct ltt_ust_event));
44d3bd01 327 if (lue == NULL) {
ba7f0ae5 328 PERROR("ust event zmalloc");
97ee3a89
DG
329 goto error;
330 }
331
332 switch (ev->type) {
333 case LTTNG_EVENT_PROBE:
44d3bd01 334 lue->attr.instrumentation = LTTNG_UST_PROBE;
97ee3a89
DG
335 break;
336 case LTTNG_EVENT_FUNCTION:
44d3bd01 337 lue->attr.instrumentation = LTTNG_UST_FUNCTION;
97ee3a89
DG
338 break;
339 case LTTNG_EVENT_FUNCTION_ENTRY:
44d3bd01 340 lue->attr.instrumentation = LTTNG_UST_FUNCTION;
97ee3a89
DG
341 break;
342 case LTTNG_EVENT_TRACEPOINT:
44d3bd01 343 lue->attr.instrumentation = LTTNG_UST_TRACEPOINT;
97ee3a89
DG
344 break;
345 default:
346 ERR("Unknown ust instrumentation type (%d)", ev->type);
44844c29 347 goto error_free_event;
97ee3a89
DG
348 }
349
350 /* Copy event name */
44d3bd01
DG
351 strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN);
352 lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0';
97ee3a89 353
0cda4f28 354 switch (ev->loglevel_type) {
8005f29a
MD
355 case LTTNG_EVENT_LOGLEVEL_ALL:
356 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL;
22e25b71 357 lue->attr.loglevel = -1; /* Force to -1 */
0cda4f28 358 break;
8005f29a
MD
359 case LTTNG_EVENT_LOGLEVEL_RANGE:
360 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE;
22e25b71 361 lue->attr.loglevel = ev->loglevel;
8005f29a
MD
362 break;
363 case LTTNG_EVENT_LOGLEVEL_SINGLE:
364 lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE;
22e25b71 365 lue->attr.loglevel = ev->loglevel;
0cda4f28
MD
366 break;
367 default:
4431494b 368 ERR("Unknown ust loglevel type (%d)", ev->loglevel_type);
0cda4f28
MD
369 goto error_free_event;
370 }
371
025faf73
DG
372 /* Same layout. */
373 lue->filter = (struct lttng_ust_filter_bytecode *) filter;
0cda4f28 374
f6a9efaa 375 /* Init node */
bec39940 376 lttng_ht_node_init_str(&lue->node, lue->attr.name);
97ee3a89 377
300b8fd5
MD
378 DBG2("Trace UST event %s, loglevel (%d,%d) created",
379 lue->attr.name, lue->attr.loglevel_type,
380 lue->attr.loglevel);
284d8f55 381
97ee3a89
DG
382 return lue;
383
44844c29
MD
384error_free_event:
385 free(lue);
97ee3a89
DG
386error:
387 return NULL;
388}
389
390/*
391 * Allocate and initialize a ust metadata.
392 *
393 * Return pointer to structure or NULL.
394 */
395struct ltt_ust_metadata *trace_ust_create_metadata(char *path)
396{
397 int ret;
398 struct ltt_ust_metadata *lum;
97ee3a89 399
0525e9ae
DG
400 assert(path);
401
3a009adb 402 lum = zmalloc(sizeof(struct ltt_ust_metadata));
44d3bd01 403 if (lum == NULL) {
df0f840b 404 PERROR("ust metadata zmalloc");
97ee3a89
DG
405 goto error;
406 }
407
408 /* Set default attributes */
44d3bd01 409 lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE;
3e230f92 410 lum->attr.subbuf_size = default_get_metadata_subbuf_size();
44d3bd01 411 lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM;
0a9c6494
DG
412 lum->attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER;
413 lum->attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER;
d41f73b7 414 lum->attr.output = LTTNG_UST_MMAP;
44d3bd01 415
97ee3a89
DG
416 lum->handle = -1;
417 /* Set metadata trace path */
30079b6b 418 ret = snprintf(lum->pathname, PATH_MAX, "%s/" DEFAULT_METADATA_NAME, path);
97ee3a89 419 if (ret < 0) {
df0f840b 420 PERROR("asprintf ust metadata");
44844c29 421 goto error_free_metadata;
97ee3a89
DG
422 }
423
424 return lum;
425
44844c29
MD
426error_free_metadata:
427 free(lum);
97ee3a89
DG
428error:
429 return NULL;
430}
431
55cc08a6
DG
432/*
433 * Allocate and initialize an UST context.
434 *
435 * Return pointer to structure or NULL.
436 */
437struct ltt_ust_context *trace_ust_create_context(
438 struct lttng_event_context *ctx)
439{
440 struct ltt_ust_context *uctx;
9197c5c4
MD
441 enum lttng_ust_context_type utype;
442
0525e9ae
DG
443 assert(ctx);
444
9197c5c4
MD
445 switch (ctx->ctx) {
446 case LTTNG_EVENT_CONTEXT_VTID:
447 utype = LTTNG_UST_CONTEXT_VTID;
448 break;
449 case LTTNG_EVENT_CONTEXT_VPID:
450 utype = LTTNG_UST_CONTEXT_VPID;
451 break;
452 case LTTNG_EVENT_CONTEXT_PTHREAD_ID:
453 utype = LTTNG_UST_CONTEXT_PTHREAD_ID;
454 break;
455 case LTTNG_EVENT_CONTEXT_PROCNAME:
456 utype = LTTNG_UST_CONTEXT_PROCNAME;
457 break;
7c612c2e
WP
458 case LTTNG_EVENT_CONTEXT_IP:
459 utype = LTTNG_UST_CONTEXT_IP;
460 break;
9197c5c4
MD
461 default:
462 ERR("Invalid UST context");
463 return NULL;
464 }
55cc08a6
DG
465
466 uctx = zmalloc(sizeof(struct ltt_ust_context));
467 if (uctx == NULL) {
468 PERROR("zmalloc ltt_ust_context");
469 goto error;
470 }
471
9197c5c4 472 uctx->ctx.ctx = utype;
bec39940 473 lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx);
31746f93 474 CDS_INIT_LIST_HEAD(&uctx->list);
55cc08a6
DG
475
476 return uctx;
477
478error:
479 return NULL;
480}
481
f6a9efaa
DG
482/*
483 * RCU safe free context structure.
484 */
485static void destroy_context_rcu(struct rcu_head *head)
486{
bec39940
DG
487 struct lttng_ht_node_ulong *node =
488 caa_container_of(head, struct lttng_ht_node_ulong, head);
f6a9efaa
DG
489 struct ltt_ust_context *ctx =
490 caa_container_of(node, struct ltt_ust_context, node);
491
492 free(ctx);
493}
494
495/*
496 * Cleanup UST context hash table.
497 */
7bd39047 498static void destroy_contexts(struct lttng_ht *ht)
f6a9efaa
DG
499{
500 int ret;
bec39940
DG
501 struct lttng_ht_node_ulong *node;
502 struct lttng_ht_iter iter;
31746f93 503 struct ltt_ust_context *ctx;
f6a9efaa 504
0525e9ae
DG
505 assert(ht);
506
36b588ed 507 rcu_read_lock();
bec39940 508 cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) {
31746f93
DG
509 /* Remove from ordered list. */
510 ctx = caa_container_of(node, struct ltt_ust_context, node);
511 cds_list_del(&ctx->list);
512 /* Remove from channel's hash table. */
bec39940 513 ret = lttng_ht_del(ht, &iter);
f6a9efaa
DG
514 if (!ret) {
515 call_rcu(&node->head, destroy_context_rcu);
516 }
f6a9efaa 517 }
36b588ed 518 rcu_read_unlock();
ed52805d 519
0b2dc8df 520 ht_cleanup_push(ht);
f6a9efaa
DG
521}
522
97ee3a89
DG
523/*
524 * Cleanup ust event structure.
525 */
526void trace_ust_destroy_event(struct ltt_ust_event *event)
527{
0525e9ae
DG
528 assert(event);
529
f6a9efaa 530 DBG2("Trace destroy UST event %s", event->attr.name);
53a80697 531 free(event->filter);
97ee3a89
DG
532 free(event);
533}
534
f6a9efaa
DG
535/*
536 * URCU intermediate call to complete destroy event.
537 */
538static void destroy_event_rcu(struct rcu_head *head)
539{
bec39940
DG
540 struct lttng_ht_node_str *node =
541 caa_container_of(head, struct lttng_ht_node_str, head);
f6a9efaa
DG
542 struct ltt_ust_event *event =
543 caa_container_of(node, struct ltt_ust_event, node);
544
545 trace_ust_destroy_event(event);
546}
547
284d8f55
DG
548/*
549 * Cleanup UST events hashtable.
550 */
7bd39047 551static void destroy_events(struct lttng_ht *events)
ed52805d
DG
552{
553 int ret;
bec39940
DG
554 struct lttng_ht_node_str *node;
555 struct lttng_ht_iter iter;
ed52805d 556
0525e9ae
DG
557 assert(events);
558
36b588ed 559 rcu_read_lock();
bec39940
DG
560 cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) {
561 ret = lttng_ht_del(events, &iter);
7bd39047
DG
562 assert(!ret);
563 call_rcu(&node->head, destroy_event_rcu);
ed52805d 564 }
36b588ed 565 rcu_read_unlock();
ed52805d 566
0b2dc8df 567 ht_cleanup_push(events);
ed52805d
DG
568}
569
97ee3a89
DG
570/*
571 * Cleanup ust channel structure.
36b588ed
MD
572 *
573 * Should _NOT_ be called with RCU read lock held.
97ee3a89 574 */
36b588ed 575static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel)
97ee3a89 576{
0525e9ae
DG
577 assert(channel);
578
f6a9efaa 579 DBG2("Trace destroy UST channel %s", channel->name);
97ee3a89 580
7bd39047
DG
581 /* Destroying all events of the channel */
582 destroy_events(channel->events);
583 /* Destroying all context of the channel */
584 destroy_contexts(channel->ctx);
97ee3a89 585
97ee3a89 586 free(channel);
f6a9efaa
DG
587}
588
589/*
590 * URCU intermediate call to complete destroy channel.
591 */
592static void destroy_channel_rcu(struct rcu_head *head)
593{
bec39940
DG
594 struct lttng_ht_node_str *node =
595 caa_container_of(head, struct lttng_ht_node_str, head);
f6a9efaa
DG
596 struct ltt_ust_channel *channel =
597 caa_container_of(node, struct ltt_ust_channel, node);
598
36b588ed
MD
599 _trace_ust_destroy_channel(channel);
600}
601
602void trace_ust_destroy_channel(struct ltt_ust_channel *channel)
603{
604 call_rcu(&channel->node.head, destroy_channel_rcu);
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605}
606
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607/*
608 * Remove an UST channel from a channel HT.
609 */
610void trace_ust_delete_channel(struct lttng_ht *ht,
611 struct ltt_ust_channel *channel)
612{
613 int ret;
614 struct lttng_ht_iter iter;
615
616 assert(ht);
617 assert(channel);
618
619 iter.iter.node = &channel->node.node;
620 ret = lttng_ht_del(ht, &iter);
621 assert(!ret);
622}
623
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624/*
625 * Cleanup ust metadata structure.
626 */
627void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata)
628{
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629 assert(metadata);
630
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631 if (!metadata->handle) {
632 return;
633 }
f6a9efaa 634 DBG2("Trace UST destroy metadata %d", metadata->handle);
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635 free(metadata);
636}
637
638/*
f6a9efaa 639 * Iterate over a hash table containing channels and cleanup safely.
97ee3a89 640 */
bec39940 641static void destroy_channels(struct lttng_ht *channels)
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642{
643 int ret;
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644 struct lttng_ht_node_str *node;
645 struct lttng_ht_iter iter;
f6a9efaa 646
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647 assert(channels);
648
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649 rcu_read_lock();
650
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651 cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) {
652 ret = lttng_ht_del(channels, &iter);
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653 assert(!ret);
654 call_rcu(&node->head, destroy_channel_rcu);
f6a9efaa 655 }
36b588ed 656 rcu_read_unlock();
ed52805d 657
0b2dc8df 658 ht_cleanup_push(channels);
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659}
660
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661/*
662 * Cleanup UST global domain.
663 */
664static void destroy_domain_global(struct ltt_ust_domain_global *dom)
665{
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666 assert(dom);
667
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668 destroy_channels(dom->channels);
669}
97ee3a89 670
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671/*
672 * Cleanup ust session structure
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673 *
674 * Should *NOT* be called with RCU read-side lock held.
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675 */
676void trace_ust_destroy_session(struct ltt_ust_session *session)
677{
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678 struct buffer_reg_uid *reg, *sreg;
679
0525e9ae 680 assert(session);
97ee3a89 681
d9bf3ca4 682 DBG2("Trace UST destroy session %" PRIu64, session->id);
f6a9efaa 683
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684 /* Cleaning up UST domain */
685 destroy_domain_global(&session->domain_global);
0475c50c 686 jul_destroy_domain(&session->domain_jul);
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687
688 /* Cleanup UID buffer registry object(s). */
689 cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list,
690 lnode) {
691 cds_list_del(&reg->lnode);
692 buffer_reg_uid_remove(reg);
693 buffer_reg_uid_destroy(reg, session->consumer);
694 }
44d3bd01 695
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696 consumer_destroy_output(session->consumer);
697 consumer_destroy_output(session->tmp_consumer);
698
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699 free(session);
700}
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