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 | 28 | #include "trace-ust.h" |
0b2dc8df | 29 | #include "utils.h" |
97ee3a89 | 30 | |
025faf73 DG |
31 | /* |
32 | * Match function for the events hash table lookup. | |
33 | * | |
34 | * Matches by name only. Used by the disable command. | |
35 | */ | |
18eace3b DG |
36 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
37 | const void *_key) | |
38 | { | |
39 | struct ltt_ust_event *event; | |
40 | const char *name; | |
41 | ||
42 | assert(node); | |
43 | assert(_key); | |
44 | ||
45 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
46 | name = _key; | |
47 | ||
48 | /* Event name */ | |
49 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
50 | goto no_match; | |
51 | } | |
52 | ||
025faf73 | 53 | /* Match */ |
18eace3b DG |
54 | return 1; |
55 | ||
56 | no_match: | |
57 | return 0; | |
58 | } | |
59 | ||
025faf73 DG |
60 | /* |
61 | * Match function for the hash table lookup. | |
62 | * | |
63 | * It matches an ust event based on three attributes which are the event name, | |
64 | * the filter bytecode and the loglevel. | |
65 | */ | |
18eace3b DG |
66 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
67 | { | |
68 | struct ltt_ust_event *event; | |
69 | const struct ltt_ust_ht_key *key; | |
70 | ||
71 | assert(node); | |
72 | assert(_key); | |
73 | ||
74 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
75 | key = _key; | |
76 | ||
77 | /* Match the 3 elements of the key: name, filter and loglevel. */ | |
78 | ||
79 | /* Event name */ | |
80 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
81 | goto no_match; |
82 | } | |
83 | ||
84 | /* Event loglevel. */ | |
85 | if (event->attr.loglevel != key->loglevel) { | |
025faf73 DG |
86 | if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL |
87 | && key->loglevel == 0 && event->attr.loglevel == -1) { | |
18eace3b | 88 | /* |
025faf73 DG |
89 | * Match is accepted. This is because on event creation, the |
90 | * loglevel is set to -1 if the event loglevel type is ALL so 0 and | |
91 | * -1 are accepted for this loglevel type since 0 is the one set by | |
92 | * the API when receiving an enable event. | |
18eace3b DG |
93 | */ |
94 | } else { | |
18eace3b DG |
95 | goto no_match; |
96 | } | |
97 | } | |
98 | ||
99 | /* Only one of the filters is NULL, fail. */ | |
100 | if ((key->filter && !event->filter) || (!key->filter && event->filter)) { | |
18eace3b DG |
101 | goto no_match; |
102 | } | |
103 | ||
025faf73 DG |
104 | if (key->filter && event->filter) { |
105 | /* Both filters exists, check length followed by the bytecode. */ | |
106 | if (event->filter->len != key->filter->len || | |
107 | memcmp(event->filter->data, key->filter->data, | |
108 | event->filter->len) != 0) { | |
109 | goto no_match; | |
110 | } | |
18eace3b DG |
111 | } |
112 | ||
025faf73 DG |
113 | /* Match. */ |
114 | return 1; | |
18eace3b DG |
115 | |
116 | no_match: | |
117 | return 0; | |
18eace3b DG |
118 | } |
119 | ||
0177d773 | 120 | /* |
2223c96f DG |
121 | * Find the channel in the hashtable and return channel pointer. RCU read side |
122 | * lock MUST be acquired before calling this. | |
0177d773 | 123 | */ |
bec39940 | 124 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 125 | char *name) |
0177d773 | 126 | { |
bec39940 DG |
127 | struct lttng_ht_node_str *node; |
128 | struct lttng_ht_iter iter; | |
0177d773 | 129 | |
bec39940 DG |
130 | lttng_ht_lookup(ht, (void *)name, &iter); |
131 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 132 | if (node == NULL) { |
44d3bd01 DG |
133 | goto error; |
134 | } | |
135 | ||
f6a9efaa | 136 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 137 | |
f6a9efaa | 138 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
139 | |
140 | error: | |
f6a9efaa | 141 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
142 | return NULL; |
143 | } | |
144 | ||
145 | /* | |
2223c96f DG |
146 | * Find the event in the hashtable and return event pointer. RCU read side lock |
147 | * MUST be acquired before calling this. | |
97ee3a89 | 148 | */ |
18eace3b DG |
149 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
150 | char *name, struct lttng_filter_bytecode *filter, int loglevel) | |
97ee3a89 | 151 | { |
bec39940 DG |
152 | struct lttng_ht_node_str *node; |
153 | struct lttng_ht_iter iter; | |
18eace3b | 154 | struct ltt_ust_ht_key key; |
97ee3a89 | 155 | |
18eace3b DG |
156 | assert(name); |
157 | assert(ht); | |
158 | ||
159 | key.name = name; | |
160 | key.filter = filter; | |
161 | key.loglevel = loglevel; | |
162 | ||
18eace3b DG |
163 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
164 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 165 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 166 | if (node == NULL) { |
97ee3a89 DG |
167 | goto error; |
168 | } | |
169 | ||
18eace3b | 170 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
171 | |
172 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
173 | |
174 | error: | |
18eace3b | 175 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
176 | return NULL; |
177 | } | |
178 | ||
179 | /* | |
180 | * Allocate and initialize a ust session data structure. | |
181 | * | |
182 | * Return pointer to structure or NULL. | |
183 | */ | |
dec56f6c | 184 | struct ltt_ust_session *trace_ust_create_session(unsigned int session_id) |
97ee3a89 DG |
185 | { |
186 | struct ltt_ust_session *lus; | |
187 | ||
188 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 189 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 190 | if (lus == NULL) { |
ba7f0ae5 | 191 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
192 | goto error; |
193 | } | |
194 | ||
195 | /* Init data structure */ | |
a991f516 | 196 | lus->id = session_id; |
36dc12cc | 197 | lus->start_trace = 0; |
97ee3a89 | 198 | |
7972aab2 DG |
199 | /* |
200 | * Default buffer type. This can be changed through an enable channel | |
201 | * requesting a different type. Note that this can only be changed once | |
202 | * during the session lifetime which is at the first enable channel and | |
203 | * only before start. The flag buffer_type_changed indicates the status. | |
204 | */ | |
205 | lus->buffer_type = LTTNG_BUFFER_PER_PID; | |
206 | /* Once set to 1, the buffer_type is immutable for the session. */ | |
207 | lus->buffer_type_changed = 0; | |
208 | /* Init it in case it get used after allocation. */ | |
209 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
210 | |
211 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 212 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
44d3bd01 | 213 | |
00e2e675 DG |
214 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
215 | if (lus->consumer == NULL) { | |
09a90bcd | 216 | goto error_consumer; |
00e2e675 DG |
217 | } |
218 | ||
219 | /* | |
220 | * The tmp_consumer stays NULL until a set_consumer_uri command is | |
221 | * executed. At this point, the consumer should be nullify until an | |
222 | * enable_consumer command. This assignment is symbolic since we've zmalloc | |
223 | * the struct. | |
224 | */ | |
225 | lus->tmp_consumer = NULL; | |
226 | ||
44d3bd01 DG |
227 | DBG2("UST trace session create successful"); |
228 | ||
97ee3a89 DG |
229 | return lus; |
230 | ||
09a90bcd | 231 | error_consumer: |
0b2dc8df | 232 | ht_cleanup_push(lus->domain_global.channels); |
44844c29 | 233 | free(lus); |
97ee3a89 DG |
234 | error: |
235 | return NULL; | |
236 | } | |
237 | ||
238 | /* | |
239 | * Allocate and initialize a ust channel data structure. | |
240 | * | |
241 | * Return pointer to structure or NULL. | |
242 | */ | |
dec56f6c | 243 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan) |
97ee3a89 | 244 | { |
97ee3a89 DG |
245 | struct ltt_ust_channel *luc; |
246 | ||
0525e9ae | 247 | assert(chan); |
0525e9ae | 248 | |
37357452 | 249 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 250 | if (luc == NULL) { |
df0f840b | 251 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
252 | goto error; |
253 | } | |
254 | ||
44d3bd01 | 255 | /* Copy UST channel attributes */ |
48842b30 DG |
256 | luc->attr.overwrite = chan->attr.overwrite; |
257 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
258 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
259 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
260 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 261 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
262 | |
263 | /* Translate to UST output enum */ | |
264 | switch (luc->attr.output) { | |
265 | default: | |
266 | luc->attr.output = LTTNG_UST_MMAP; | |
267 | break; | |
97ee3a89 | 268 | } |
97ee3a89 | 269 | |
97ee3a89 | 270 | /* Copy channel name */ |
0a1459bb | 271 | strncpy(luc->name, chan->name, sizeof(luc->name)); |
97ee3a89 DG |
272 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
273 | ||
f6a9efaa | 274 | /* Init node */ |
bec39940 | 275 | lttng_ht_node_init_str(&luc->node, luc->name); |
f6a9efaa | 276 | /* Alloc hash tables */ |
bec39940 DG |
277 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
278 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 279 | |
1624d5b7 JD |
280 | /* On-disk circular buffer parameters */ |
281 | luc->tracefile_size = chan->attr.tracefile_size; | |
282 | luc->tracefile_count = chan->attr.tracefile_count; | |
283 | ||
f6a9efaa DG |
284 | DBG2("Trace UST channel %s created", luc->name); |
285 | ||
97ee3a89 | 286 | error: |
7972aab2 | 287 | return luc; |
97ee3a89 DG |
288 | } |
289 | ||
290 | /* | |
291 | * Allocate and initialize a ust event. Set name and event type. | |
292 | * | |
293 | * Return pointer to structure or NULL. | |
294 | */ | |
025faf73 DG |
295 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
296 | struct lttng_filter_bytecode *filter) | |
97ee3a89 DG |
297 | { |
298 | struct ltt_ust_event *lue; | |
97ee3a89 | 299 | |
0525e9ae DG |
300 | assert(ev); |
301 | ||
37357452 | 302 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 303 | if (lue == NULL) { |
ba7f0ae5 | 304 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
305 | goto error; |
306 | } | |
307 | ||
308 | switch (ev->type) { | |
309 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 310 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
311 | break; |
312 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 313 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
314 | break; |
315 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 316 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
317 | break; |
318 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 319 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
320 | break; |
321 | default: | |
322 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 323 | goto error_free_event; |
97ee3a89 DG |
324 | } |
325 | ||
326 | /* Copy event name */ | |
44d3bd01 DG |
327 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
328 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 329 | |
0cda4f28 | 330 | switch (ev->loglevel_type) { |
8005f29a MD |
331 | case LTTNG_EVENT_LOGLEVEL_ALL: |
332 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 333 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 334 | break; |
8005f29a MD |
335 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
336 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 337 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
338 | break; |
339 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
340 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 341 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
342 | break; |
343 | default: | |
4431494b | 344 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
345 | goto error_free_event; |
346 | } | |
347 | ||
025faf73 DG |
348 | /* Same layout. */ |
349 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; | |
0cda4f28 | 350 | |
f6a9efaa | 351 | /* Init node */ |
bec39940 | 352 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 353 | |
300b8fd5 MD |
354 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
355 | lue->attr.name, lue->attr.loglevel_type, | |
356 | lue->attr.loglevel); | |
284d8f55 | 357 | |
97ee3a89 DG |
358 | return lue; |
359 | ||
44844c29 MD |
360 | error_free_event: |
361 | free(lue); | |
97ee3a89 DG |
362 | error: |
363 | return NULL; | |
364 | } | |
365 | ||
366 | /* | |
367 | * Allocate and initialize a ust metadata. | |
368 | * | |
369 | * Return pointer to structure or NULL. | |
370 | */ | |
371 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
372 | { | |
373 | int ret; | |
374 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 375 | |
0525e9ae DG |
376 | assert(path); |
377 | ||
3a009adb | 378 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 379 | if (lum == NULL) { |
df0f840b | 380 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
381 | goto error; |
382 | } | |
383 | ||
384 | /* Set default attributes */ | |
44d3bd01 | 385 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 386 | lum->attr.subbuf_size = default_get_metadata_subbuf_size(); |
44d3bd01 | 387 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
0a9c6494 DG |
388 | lum->attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; |
389 | lum->attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
d41f73b7 | 390 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 391 | |
97ee3a89 DG |
392 | lum->handle = -1; |
393 | /* Set metadata trace path */ | |
30079b6b | 394 | ret = snprintf(lum->pathname, PATH_MAX, "%s/" DEFAULT_METADATA_NAME, path); |
97ee3a89 | 395 | if (ret < 0) { |
df0f840b | 396 | PERROR("asprintf ust metadata"); |
44844c29 | 397 | goto error_free_metadata; |
97ee3a89 DG |
398 | } |
399 | ||
400 | return lum; | |
401 | ||
44844c29 MD |
402 | error_free_metadata: |
403 | free(lum); | |
97ee3a89 DG |
404 | error: |
405 | return NULL; | |
406 | } | |
407 | ||
55cc08a6 DG |
408 | /* |
409 | * Allocate and initialize an UST context. | |
410 | * | |
411 | * Return pointer to structure or NULL. | |
412 | */ | |
413 | struct ltt_ust_context *trace_ust_create_context( | |
414 | struct lttng_event_context *ctx) | |
415 | { | |
416 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
417 | enum lttng_ust_context_type utype; |
418 | ||
0525e9ae DG |
419 | assert(ctx); |
420 | ||
9197c5c4 MD |
421 | switch (ctx->ctx) { |
422 | case LTTNG_EVENT_CONTEXT_VTID: | |
423 | utype = LTTNG_UST_CONTEXT_VTID; | |
424 | break; | |
425 | case LTTNG_EVENT_CONTEXT_VPID: | |
426 | utype = LTTNG_UST_CONTEXT_VPID; | |
427 | break; | |
428 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
429 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
430 | break; | |
431 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
432 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
433 | break; | |
434 | default: | |
435 | ERR("Invalid UST context"); | |
436 | return NULL; | |
437 | } | |
55cc08a6 DG |
438 | |
439 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
440 | if (uctx == NULL) { | |
441 | PERROR("zmalloc ltt_ust_context"); | |
442 | goto error; | |
443 | } | |
444 | ||
9197c5c4 | 445 | uctx->ctx.ctx = utype; |
bec39940 | 446 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
447 | |
448 | return uctx; | |
449 | ||
450 | error: | |
451 | return NULL; | |
452 | } | |
453 | ||
f6a9efaa DG |
454 | /* |
455 | * RCU safe free context structure. | |
456 | */ | |
457 | static void destroy_context_rcu(struct rcu_head *head) | |
458 | { | |
bec39940 DG |
459 | struct lttng_ht_node_ulong *node = |
460 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
461 | struct ltt_ust_context *ctx = |
462 | caa_container_of(node, struct ltt_ust_context, node); | |
463 | ||
464 | free(ctx); | |
465 | } | |
466 | ||
467 | /* | |
468 | * Cleanup UST context hash table. | |
469 | */ | |
7bd39047 | 470 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
471 | { |
472 | int ret; | |
bec39940 DG |
473 | struct lttng_ht_node_ulong *node; |
474 | struct lttng_ht_iter iter; | |
f6a9efaa | 475 | |
0525e9ae DG |
476 | assert(ht); |
477 | ||
36b588ed | 478 | rcu_read_lock(); |
bec39940 DG |
479 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
480 | ret = lttng_ht_del(ht, &iter); | |
f6a9efaa DG |
481 | if (!ret) { |
482 | call_rcu(&node->head, destroy_context_rcu); | |
483 | } | |
f6a9efaa | 484 | } |
36b588ed | 485 | rcu_read_unlock(); |
ed52805d | 486 | |
0b2dc8df | 487 | ht_cleanup_push(ht); |
f6a9efaa DG |
488 | } |
489 | ||
97ee3a89 DG |
490 | /* |
491 | * Cleanup ust event structure. | |
492 | */ | |
493 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
494 | { | |
0525e9ae DG |
495 | assert(event); |
496 | ||
f6a9efaa | 497 | DBG2("Trace destroy UST event %s", event->attr.name); |
53a80697 | 498 | free(event->filter); |
97ee3a89 DG |
499 | free(event); |
500 | } | |
501 | ||
f6a9efaa DG |
502 | /* |
503 | * URCU intermediate call to complete destroy event. | |
504 | */ | |
505 | static void destroy_event_rcu(struct rcu_head *head) | |
506 | { | |
bec39940 DG |
507 | struct lttng_ht_node_str *node = |
508 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
509 | struct ltt_ust_event *event = |
510 | caa_container_of(node, struct ltt_ust_event, node); | |
511 | ||
512 | trace_ust_destroy_event(event); | |
513 | } | |
514 | ||
284d8f55 DG |
515 | /* |
516 | * Cleanup UST events hashtable. | |
517 | */ | |
7bd39047 | 518 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
519 | { |
520 | int ret; | |
bec39940 DG |
521 | struct lttng_ht_node_str *node; |
522 | struct lttng_ht_iter iter; | |
ed52805d | 523 | |
0525e9ae DG |
524 | assert(events); |
525 | ||
36b588ed | 526 | rcu_read_lock(); |
bec39940 DG |
527 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
528 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
529 | assert(!ret); |
530 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 531 | } |
36b588ed | 532 | rcu_read_unlock(); |
ed52805d | 533 | |
0b2dc8df | 534 | ht_cleanup_push(events); |
ed52805d DG |
535 | } |
536 | ||
97ee3a89 DG |
537 | /* |
538 | * Cleanup ust channel structure. | |
36b588ed MD |
539 | * |
540 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 541 | */ |
36b588ed | 542 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 543 | { |
0525e9ae DG |
544 | assert(channel); |
545 | ||
f6a9efaa | 546 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 547 | |
7bd39047 DG |
548 | /* Destroying all events of the channel */ |
549 | destroy_events(channel->events); | |
550 | /* Destroying all context of the channel */ | |
551 | destroy_contexts(channel->ctx); | |
97ee3a89 | 552 | |
97ee3a89 | 553 | free(channel); |
f6a9efaa DG |
554 | } |
555 | ||
556 | /* | |
557 | * URCU intermediate call to complete destroy channel. | |
558 | */ | |
559 | static void destroy_channel_rcu(struct rcu_head *head) | |
560 | { | |
bec39940 DG |
561 | struct lttng_ht_node_str *node = |
562 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
563 | struct ltt_ust_channel *channel = |
564 | caa_container_of(node, struct ltt_ust_channel, node); | |
565 | ||
36b588ed MD |
566 | _trace_ust_destroy_channel(channel); |
567 | } | |
568 | ||
569 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
570 | { | |
571 | call_rcu(&channel->node.head, destroy_channel_rcu); | |
97ee3a89 DG |
572 | } |
573 | ||
574 | /* | |
575 | * Cleanup ust metadata structure. | |
576 | */ | |
577 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
578 | { | |
0525e9ae DG |
579 | assert(metadata); |
580 | ||
abc9138a MD |
581 | if (!metadata->handle) { |
582 | return; | |
583 | } | |
f6a9efaa | 584 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
585 | free(metadata); |
586 | } | |
587 | ||
588 | /* | |
f6a9efaa | 589 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 590 | */ |
bec39940 | 591 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
592 | { |
593 | int ret; | |
bec39940 DG |
594 | struct lttng_ht_node_str *node; |
595 | struct lttng_ht_iter iter; | |
f6a9efaa | 596 | |
0525e9ae DG |
597 | assert(channels); |
598 | ||
24d1723f DG |
599 | rcu_read_lock(); |
600 | ||
bec39940 DG |
601 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
602 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
603 | assert(!ret); |
604 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 605 | } |
36b588ed | 606 | rcu_read_unlock(); |
ed52805d | 607 | |
0b2dc8df | 608 | ht_cleanup_push(channels); |
f6a9efaa DG |
609 | } |
610 | ||
f6a9efaa DG |
611 | /* |
612 | * Cleanup UST global domain. | |
613 | */ | |
614 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
615 | { | |
0525e9ae DG |
616 | assert(dom); |
617 | ||
f6a9efaa DG |
618 | destroy_channels(dom->channels); |
619 | } | |
97ee3a89 | 620 | |
f6a9efaa DG |
621 | /* |
622 | * Cleanup ust session structure | |
36b588ed MD |
623 | * |
624 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
625 | */ |
626 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
627 | { | |
7972aab2 DG |
628 | struct buffer_reg_uid *reg, *sreg; |
629 | ||
0525e9ae | 630 | assert(session); |
97ee3a89 | 631 | |
fc4705fe | 632 | DBG2("Trace UST destroy session %u", session->id); |
f6a9efaa | 633 | |
f6a9efaa DG |
634 | /* Cleaning up UST domain */ |
635 | destroy_domain_global(&session->domain_global); | |
7972aab2 DG |
636 | |
637 | /* Cleanup UID buffer registry object(s). */ | |
638 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
639 | lnode) { | |
640 | cds_list_del(®->lnode); | |
641 | buffer_reg_uid_remove(reg); | |
642 | buffer_reg_uid_destroy(reg, session->consumer); | |
643 | } | |
44d3bd01 | 644 | |
3f8e211f DG |
645 | consumer_destroy_output(session->consumer); |
646 | consumer_destroy_output(session->tmp_consumer); | |
647 | ||
97ee3a89 DG |
648 | free(session); |
649 | } |