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> | |
77c5447b | 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 |
37 | int 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 | ||
57 | no_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 |
67 | int 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 DG |
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 DG |
114 | /* Match. */ |
115 | return 1; | |
18eace3b DG |
116 | |
117 | no_match: | |
118 | return 0; | |
18eace3b DG |
119 | } |
120 | ||
0177d773 | 121 | /* |
2223c96f DG |
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 | 125 | struct 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 | |
bec39940 DG |
131 | lttng_ht_lookup(ht, (void *)name, &iter); |
132 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 133 | if (node == NULL) { |
44d3bd01 DG |
134 | goto error; |
135 | } | |
136 | ||
f6a9efaa | 137 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 138 | |
f6a9efaa | 139 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
140 | |
141 | error: | |
f6a9efaa | 142 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
143 | return NULL; |
144 | } | |
145 | ||
146 | /* | |
2223c96f DG |
147 | * Find the event in the hashtable and return event pointer. RCU read side lock |
148 | * MUST be acquired before calling this. | |
97ee3a89 | 149 | */ |
18eace3b DG |
150 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
151 | char *name, struct lttng_filter_bytecode *filter, int loglevel) | |
97ee3a89 | 152 | { |
bec39940 DG |
153 | struct lttng_ht_node_str *node; |
154 | struct lttng_ht_iter iter; | |
18eace3b | 155 | struct ltt_ust_ht_key key; |
97ee3a89 | 156 | |
18eace3b DG |
157 | assert(name); |
158 | assert(ht); | |
159 | ||
160 | key.name = name; | |
161 | key.filter = filter; | |
162 | key.loglevel = loglevel; | |
163 | ||
18eace3b DG |
164 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
165 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 166 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 167 | if (node == NULL) { |
97ee3a89 DG |
168 | goto error; |
169 | } | |
170 | ||
18eace3b | 171 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
172 | |
173 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
174 | |
175 | error: | |
18eace3b | 176 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
177 | return NULL; |
178 | } | |
179 | ||
180 | /* | |
181 | * Allocate and initialize a ust session data structure. | |
182 | * | |
183 | * Return pointer to structure or NULL. | |
184 | */ | |
77c5447b | 185 | struct ltt_ust_session *trace_ust_create_session(uint64_t session_id) |
97ee3a89 DG |
186 | { |
187 | struct ltt_ust_session *lus; | |
188 | ||
189 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 190 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 191 | if (lus == NULL) { |
ba7f0ae5 | 192 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
193 | goto error; |
194 | } | |
195 | ||
196 | /* Init data structure */ | |
a991f516 | 197 | lus->id = session_id; |
36dc12cc | 198 | lus->start_trace = 0; |
97ee3a89 | 199 | |
7972aab2 DG |
200 | /* |
201 | * Default buffer type. This can be changed through an enable channel | |
202 | * requesting a different type. Note that this can only be changed once | |
203 | * during the session lifetime which is at the first enable channel and | |
204 | * only before start. The flag buffer_type_changed indicates the status. | |
205 | */ | |
206 | lus->buffer_type = LTTNG_BUFFER_PER_PID; | |
207 | /* Once set to 1, the buffer_type is immutable for the session. */ | |
208 | lus->buffer_type_changed = 0; | |
209 | /* Init it in case it get used after allocation. */ | |
210 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
211 | |
212 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 213 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
44d3bd01 | 214 | |
00e2e675 DG |
215 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
216 | if (lus->consumer == NULL) { | |
09a90bcd | 217 | goto error_consumer; |
00e2e675 DG |
218 | } |
219 | ||
220 | /* | |
221 | * The tmp_consumer stays NULL until a set_consumer_uri command is | |
222 | * executed. At this point, the consumer should be nullify until an | |
223 | * enable_consumer command. This assignment is symbolic since we've zmalloc | |
224 | * the struct. | |
225 | */ | |
226 | lus->tmp_consumer = NULL; | |
227 | ||
44d3bd01 DG |
228 | DBG2("UST trace session create successful"); |
229 | ||
97ee3a89 DG |
230 | return lus; |
231 | ||
09a90bcd | 232 | error_consumer: |
0b2dc8df | 233 | ht_cleanup_push(lus->domain_global.channels); |
44844c29 | 234 | free(lus); |
97ee3a89 DG |
235 | error: |
236 | return NULL; | |
237 | } | |
238 | ||
239 | /* | |
240 | * Allocate and initialize a ust channel data structure. | |
241 | * | |
242 | * Return pointer to structure or NULL. | |
243 | */ | |
dec56f6c | 244 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan) |
97ee3a89 | 245 | { |
97ee3a89 DG |
246 | struct ltt_ust_channel *luc; |
247 | ||
0525e9ae | 248 | assert(chan); |
0525e9ae | 249 | |
37357452 | 250 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 251 | if (luc == NULL) { |
df0f840b | 252 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
253 | goto error; |
254 | } | |
255 | ||
44d3bd01 | 256 | /* Copy UST channel attributes */ |
48842b30 DG |
257 | luc->attr.overwrite = chan->attr.overwrite; |
258 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
259 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
260 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
261 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 262 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
263 | |
264 | /* Translate to UST output enum */ | |
265 | switch (luc->attr.output) { | |
266 | default: | |
267 | luc->attr.output = LTTNG_UST_MMAP; | |
268 | break; | |
97ee3a89 | 269 | } |
97ee3a89 | 270 | |
97ee3a89 | 271 | /* Copy channel name */ |
0a1459bb | 272 | strncpy(luc->name, chan->name, sizeof(luc->name)); |
97ee3a89 DG |
273 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
274 | ||
f6a9efaa | 275 | /* Init node */ |
bec39940 | 276 | lttng_ht_node_init_str(&luc->node, luc->name); |
f6a9efaa | 277 | /* Alloc hash tables */ |
bec39940 DG |
278 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
279 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 280 | |
1624d5b7 JD |
281 | /* On-disk circular buffer parameters */ |
282 | luc->tracefile_size = chan->attr.tracefile_size; | |
283 | luc->tracefile_count = chan->attr.tracefile_count; | |
284 | ||
f6a9efaa DG |
285 | DBG2("Trace UST channel %s created", luc->name); |
286 | ||
97ee3a89 | 287 | error: |
7972aab2 | 288 | return luc; |
97ee3a89 DG |
289 | } |
290 | ||
291 | /* | |
292 | * Allocate and initialize a ust event. Set name and event type. | |
293 | * | |
294 | * Return pointer to structure or NULL. | |
295 | */ | |
025faf73 DG |
296 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
297 | struct lttng_filter_bytecode *filter) | |
97ee3a89 DG |
298 | { |
299 | struct ltt_ust_event *lue; | |
97ee3a89 | 300 | |
0525e9ae DG |
301 | assert(ev); |
302 | ||
37357452 | 303 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 304 | if (lue == NULL) { |
ba7f0ae5 | 305 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
306 | goto error; |
307 | } | |
308 | ||
309 | switch (ev->type) { | |
310 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 311 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
312 | break; |
313 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 314 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
315 | break; |
316 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 317 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
318 | break; |
319 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 320 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
321 | break; |
322 | default: | |
323 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 324 | goto error_free_event; |
97ee3a89 DG |
325 | } |
326 | ||
327 | /* Copy event name */ | |
44d3bd01 DG |
328 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
329 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 330 | |
0cda4f28 | 331 | switch (ev->loglevel_type) { |
8005f29a MD |
332 | case LTTNG_EVENT_LOGLEVEL_ALL: |
333 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 334 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 335 | break; |
8005f29a MD |
336 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
337 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 338 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
339 | break; |
340 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
341 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 342 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
343 | break; |
344 | default: | |
4431494b | 345 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
346 | goto error_free_event; |
347 | } | |
348 | ||
025faf73 DG |
349 | /* Same layout. */ |
350 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; | |
0cda4f28 | 351 | |
f6a9efaa | 352 | /* Init node */ |
bec39940 | 353 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 354 | |
300b8fd5 MD |
355 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
356 | lue->attr.name, lue->attr.loglevel_type, | |
357 | lue->attr.loglevel); | |
284d8f55 | 358 | |
97ee3a89 DG |
359 | return lue; |
360 | ||
44844c29 MD |
361 | error_free_event: |
362 | free(lue); | |
97ee3a89 DG |
363 | error: |
364 | return NULL; | |
365 | } | |
366 | ||
367 | /* | |
368 | * Allocate and initialize a ust metadata. | |
369 | * | |
370 | * Return pointer to structure or NULL. | |
371 | */ | |
372 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
373 | { | |
374 | int ret; | |
375 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 376 | |
0525e9ae DG |
377 | assert(path); |
378 | ||
3a009adb | 379 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 380 | if (lum == NULL) { |
df0f840b | 381 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
382 | goto error; |
383 | } | |
384 | ||
385 | /* Set default attributes */ | |
44d3bd01 | 386 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 387 | lum->attr.subbuf_size = default_get_metadata_subbuf_size(); |
44d3bd01 | 388 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
0a9c6494 DG |
389 | lum->attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; |
390 | lum->attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
d41f73b7 | 391 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 392 | |
97ee3a89 DG |
393 | lum->handle = -1; |
394 | /* Set metadata trace path */ | |
30079b6b | 395 | ret = snprintf(lum->pathname, PATH_MAX, "%s/" DEFAULT_METADATA_NAME, path); |
97ee3a89 | 396 | if (ret < 0) { |
df0f840b | 397 | PERROR("asprintf ust metadata"); |
44844c29 | 398 | goto error_free_metadata; |
97ee3a89 DG |
399 | } |
400 | ||
401 | return lum; | |
402 | ||
44844c29 MD |
403 | error_free_metadata: |
404 | free(lum); | |
97ee3a89 DG |
405 | error: |
406 | return NULL; | |
407 | } | |
408 | ||
55cc08a6 DG |
409 | /* |
410 | * Allocate and initialize an UST context. | |
411 | * | |
412 | * Return pointer to structure or NULL. | |
413 | */ | |
414 | struct ltt_ust_context *trace_ust_create_context( | |
415 | struct lttng_event_context *ctx) | |
416 | { | |
417 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
418 | enum lttng_ust_context_type utype; |
419 | ||
0525e9ae DG |
420 | assert(ctx); |
421 | ||
9197c5c4 MD |
422 | switch (ctx->ctx) { |
423 | case LTTNG_EVENT_CONTEXT_VTID: | |
424 | utype = LTTNG_UST_CONTEXT_VTID; | |
425 | break; | |
426 | case LTTNG_EVENT_CONTEXT_VPID: | |
427 | utype = LTTNG_UST_CONTEXT_VPID; | |
428 | break; | |
429 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
430 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
431 | break; | |
432 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
433 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
434 | break; | |
435 | default: | |
436 | ERR("Invalid UST context"); | |
437 | return NULL; | |
438 | } | |
55cc08a6 DG |
439 | |
440 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
441 | if (uctx == NULL) { | |
442 | PERROR("zmalloc ltt_ust_context"); | |
443 | goto error; | |
444 | } | |
445 | ||
9197c5c4 | 446 | uctx->ctx.ctx = utype; |
bec39940 | 447 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
448 | |
449 | return uctx; | |
450 | ||
451 | error: | |
452 | return NULL; | |
453 | } | |
454 | ||
f6a9efaa DG |
455 | /* |
456 | * RCU safe free context structure. | |
457 | */ | |
458 | static void destroy_context_rcu(struct rcu_head *head) | |
459 | { | |
bec39940 DG |
460 | struct lttng_ht_node_ulong *node = |
461 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
462 | struct ltt_ust_context *ctx = |
463 | caa_container_of(node, struct ltt_ust_context, node); | |
464 | ||
465 | free(ctx); | |
466 | } | |
467 | ||
468 | /* | |
469 | * Cleanup UST context hash table. | |
470 | */ | |
7bd39047 | 471 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
472 | { |
473 | int ret; | |
bec39940 DG |
474 | struct lttng_ht_node_ulong *node; |
475 | struct lttng_ht_iter iter; | |
f6a9efaa | 476 | |
0525e9ae DG |
477 | assert(ht); |
478 | ||
36b588ed | 479 | rcu_read_lock(); |
bec39940 DG |
480 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
481 | ret = lttng_ht_del(ht, &iter); | |
f6a9efaa DG |
482 | if (!ret) { |
483 | call_rcu(&node->head, destroy_context_rcu); | |
484 | } | |
f6a9efaa | 485 | } |
36b588ed | 486 | rcu_read_unlock(); |
ed52805d | 487 | |
0b2dc8df | 488 | ht_cleanup_push(ht); |
f6a9efaa DG |
489 | } |
490 | ||
97ee3a89 DG |
491 | /* |
492 | * Cleanup ust event structure. | |
493 | */ | |
494 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
495 | { | |
0525e9ae DG |
496 | assert(event); |
497 | ||
f6a9efaa | 498 | DBG2("Trace destroy UST event %s", event->attr.name); |
53a80697 | 499 | free(event->filter); |
97ee3a89 DG |
500 | free(event); |
501 | } | |
502 | ||
f6a9efaa DG |
503 | /* |
504 | * URCU intermediate call to complete destroy event. | |
505 | */ | |
506 | static void destroy_event_rcu(struct rcu_head *head) | |
507 | { | |
bec39940 DG |
508 | struct lttng_ht_node_str *node = |
509 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
510 | struct ltt_ust_event *event = |
511 | caa_container_of(node, struct ltt_ust_event, node); | |
512 | ||
513 | trace_ust_destroy_event(event); | |
514 | } | |
515 | ||
284d8f55 DG |
516 | /* |
517 | * Cleanup UST events hashtable. | |
518 | */ | |
7bd39047 | 519 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
520 | { |
521 | int ret; | |
bec39940 DG |
522 | struct lttng_ht_node_str *node; |
523 | struct lttng_ht_iter iter; | |
ed52805d | 524 | |
0525e9ae DG |
525 | assert(events); |
526 | ||
36b588ed | 527 | rcu_read_lock(); |
bec39940 DG |
528 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
529 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
530 | assert(!ret); |
531 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 532 | } |
36b588ed | 533 | rcu_read_unlock(); |
ed52805d | 534 | |
0b2dc8df | 535 | ht_cleanup_push(events); |
ed52805d DG |
536 | } |
537 | ||
97ee3a89 DG |
538 | /* |
539 | * Cleanup ust channel structure. | |
36b588ed MD |
540 | * |
541 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 542 | */ |
36b588ed | 543 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 544 | { |
0525e9ae DG |
545 | assert(channel); |
546 | ||
f6a9efaa | 547 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 548 | |
7bd39047 DG |
549 | /* Destroying all events of the channel */ |
550 | destroy_events(channel->events); | |
551 | /* Destroying all context of the channel */ | |
552 | destroy_contexts(channel->ctx); | |
97ee3a89 | 553 | |
97ee3a89 | 554 | free(channel); |
f6a9efaa DG |
555 | } |
556 | ||
557 | /* | |
558 | * URCU intermediate call to complete destroy channel. | |
559 | */ | |
560 | static void destroy_channel_rcu(struct rcu_head *head) | |
561 | { | |
bec39940 DG |
562 | struct lttng_ht_node_str *node = |
563 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
564 | struct ltt_ust_channel *channel = |
565 | caa_container_of(node, struct ltt_ust_channel, node); | |
566 | ||
36b588ed MD |
567 | _trace_ust_destroy_channel(channel); |
568 | } | |
569 | ||
570 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
571 | { | |
572 | call_rcu(&channel->node.head, destroy_channel_rcu); | |
97ee3a89 DG |
573 | } |
574 | ||
d5979e4a DG |
575 | /* |
576 | * Remove an UST channel from a channel HT. | |
577 | */ | |
578 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
579 | struct ltt_ust_channel *channel) | |
580 | { | |
581 | int ret; | |
582 | struct lttng_ht_iter iter; | |
583 | ||
584 | assert(ht); | |
585 | assert(channel); | |
586 | ||
587 | iter.iter.node = &channel->node.node; | |
588 | ret = lttng_ht_del(ht, &iter); | |
589 | assert(!ret); | |
590 | } | |
591 | ||
97ee3a89 DG |
592 | /* |
593 | * Cleanup ust metadata structure. | |
594 | */ | |
595 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
596 | { | |
0525e9ae DG |
597 | assert(metadata); |
598 | ||
abc9138a MD |
599 | if (!metadata->handle) { |
600 | return; | |
601 | } | |
f6a9efaa | 602 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
603 | free(metadata); |
604 | } | |
605 | ||
606 | /* | |
f6a9efaa | 607 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 608 | */ |
bec39940 | 609 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
610 | { |
611 | int ret; | |
bec39940 DG |
612 | struct lttng_ht_node_str *node; |
613 | struct lttng_ht_iter iter; | |
f6a9efaa | 614 | |
0525e9ae DG |
615 | assert(channels); |
616 | ||
24d1723f DG |
617 | rcu_read_lock(); |
618 | ||
bec39940 DG |
619 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
620 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
621 | assert(!ret); |
622 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 623 | } |
36b588ed | 624 | rcu_read_unlock(); |
ed52805d | 625 | |
0b2dc8df | 626 | ht_cleanup_push(channels); |
f6a9efaa DG |
627 | } |
628 | ||
f6a9efaa DG |
629 | /* |
630 | * Cleanup UST global domain. | |
631 | */ | |
632 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
633 | { | |
0525e9ae DG |
634 | assert(dom); |
635 | ||
f6a9efaa DG |
636 | destroy_channels(dom->channels); |
637 | } | |
97ee3a89 | 638 | |
f6a9efaa DG |
639 | /* |
640 | * Cleanup ust session structure | |
36b588ed MD |
641 | * |
642 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
643 | */ |
644 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
645 | { | |
7972aab2 DG |
646 | struct buffer_reg_uid *reg, *sreg; |
647 | ||
0525e9ae | 648 | assert(session); |
97ee3a89 | 649 | |
77c5447b | 650 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 651 | |
f6a9efaa DG |
652 | /* Cleaning up UST domain */ |
653 | destroy_domain_global(&session->domain_global); | |
7972aab2 DG |
654 | |
655 | /* Cleanup UID buffer registry object(s). */ | |
656 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
657 | lnode) { | |
658 | cds_list_del(®->lnode); | |
659 | buffer_reg_uid_remove(reg); | |
660 | buffer_reg_uid_destroy(reg, session->consumer); | |
661 | } | |
44d3bd01 | 662 | |
3f8e211f DG |
663 | consumer_destroy_output(session->consumer); |
664 | consumer_destroy_output(session->tmp_consumer); | |
665 | ||
97ee3a89 DG |
666 | free(session); |
667 | } |