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); |
4623416f DG |
277 | CDS_INIT_LIST_HEAD(&luc->ctx_list); |
278 | ||
f6a9efaa | 279 | /* Alloc hash tables */ |
bec39940 DG |
280 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
281 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 282 | |
1624d5b7 JD |
283 | /* On-disk circular buffer parameters */ |
284 | luc->tracefile_size = chan->attr.tracefile_size; | |
285 | luc->tracefile_count = chan->attr.tracefile_count; | |
286 | ||
f6a9efaa DG |
287 | DBG2("Trace UST channel %s created", luc->name); |
288 | ||
97ee3a89 | 289 | error: |
7972aab2 | 290 | return luc; |
97ee3a89 DG |
291 | } |
292 | ||
293 | /* | |
294 | * Allocate and initialize a ust event. Set name and event type. | |
295 | * | |
296 | * Return pointer to structure or NULL. | |
297 | */ | |
025faf73 DG |
298 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
299 | struct lttng_filter_bytecode *filter) | |
97ee3a89 DG |
300 | { |
301 | struct ltt_ust_event *lue; | |
97ee3a89 | 302 | |
0525e9ae DG |
303 | assert(ev); |
304 | ||
37357452 | 305 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 306 | if (lue == NULL) { |
ba7f0ae5 | 307 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
308 | goto error; |
309 | } | |
310 | ||
311 | switch (ev->type) { | |
312 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 313 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
314 | break; |
315 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 316 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
317 | break; |
318 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 319 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
320 | break; |
321 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 322 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
323 | break; |
324 | default: | |
325 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 326 | goto error_free_event; |
97ee3a89 DG |
327 | } |
328 | ||
329 | /* Copy event name */ | |
44d3bd01 DG |
330 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
331 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 332 | |
0cda4f28 | 333 | switch (ev->loglevel_type) { |
8005f29a MD |
334 | case LTTNG_EVENT_LOGLEVEL_ALL: |
335 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 336 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 337 | break; |
8005f29a MD |
338 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
339 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 340 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
341 | break; |
342 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
343 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 344 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
345 | break; |
346 | default: | |
4431494b | 347 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
348 | goto error_free_event; |
349 | } | |
350 | ||
025faf73 DG |
351 | /* Same layout. */ |
352 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; | |
0cda4f28 | 353 | |
f6a9efaa | 354 | /* Init node */ |
bec39940 | 355 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 356 | |
300b8fd5 MD |
357 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
358 | lue->attr.name, lue->attr.loglevel_type, | |
359 | lue->attr.loglevel); | |
284d8f55 | 360 | |
97ee3a89 DG |
361 | return lue; |
362 | ||
44844c29 MD |
363 | error_free_event: |
364 | free(lue); | |
97ee3a89 DG |
365 | error: |
366 | return NULL; | |
367 | } | |
368 | ||
369 | /* | |
370 | * Allocate and initialize a ust metadata. | |
371 | * | |
372 | * Return pointer to structure or NULL. | |
373 | */ | |
374 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
375 | { | |
376 | int ret; | |
377 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 378 | |
0525e9ae DG |
379 | assert(path); |
380 | ||
3a009adb | 381 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 382 | if (lum == NULL) { |
df0f840b | 383 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
384 | goto error; |
385 | } | |
386 | ||
387 | /* Set default attributes */ | |
44d3bd01 | 388 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 389 | lum->attr.subbuf_size = default_get_metadata_subbuf_size(); |
44d3bd01 | 390 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
0a9c6494 DG |
391 | lum->attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; |
392 | lum->attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
d41f73b7 | 393 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 394 | |
97ee3a89 DG |
395 | lum->handle = -1; |
396 | /* Set metadata trace path */ | |
30079b6b | 397 | ret = snprintf(lum->pathname, PATH_MAX, "%s/" DEFAULT_METADATA_NAME, path); |
97ee3a89 | 398 | if (ret < 0) { |
df0f840b | 399 | PERROR("asprintf ust metadata"); |
44844c29 | 400 | goto error_free_metadata; |
97ee3a89 DG |
401 | } |
402 | ||
403 | return lum; | |
404 | ||
44844c29 MD |
405 | error_free_metadata: |
406 | free(lum); | |
97ee3a89 DG |
407 | error: |
408 | return NULL; | |
409 | } | |
410 | ||
55cc08a6 DG |
411 | /* |
412 | * Allocate and initialize an UST context. | |
413 | * | |
414 | * Return pointer to structure or NULL. | |
415 | */ | |
416 | struct ltt_ust_context *trace_ust_create_context( | |
417 | struct lttng_event_context *ctx) | |
418 | { | |
419 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
420 | enum lttng_ust_context_type utype; |
421 | ||
0525e9ae DG |
422 | assert(ctx); |
423 | ||
9197c5c4 MD |
424 | switch (ctx->ctx) { |
425 | case LTTNG_EVENT_CONTEXT_VTID: | |
426 | utype = LTTNG_UST_CONTEXT_VTID; | |
427 | break; | |
428 | case LTTNG_EVENT_CONTEXT_VPID: | |
429 | utype = LTTNG_UST_CONTEXT_VPID; | |
430 | break; | |
431 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
432 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
433 | break; | |
434 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
435 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
436 | break; | |
437 | default: | |
438 | ERR("Invalid UST context"); | |
439 | return NULL; | |
440 | } | |
55cc08a6 DG |
441 | |
442 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
443 | if (uctx == NULL) { | |
444 | PERROR("zmalloc ltt_ust_context"); | |
445 | goto error; | |
446 | } | |
447 | ||
9197c5c4 | 448 | uctx->ctx.ctx = utype; |
bec39940 | 449 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
4623416f | 450 | CDS_INIT_LIST_HEAD(&uctx->list); |
55cc08a6 DG |
451 | |
452 | return uctx; | |
453 | ||
454 | error: | |
455 | return NULL; | |
456 | } | |
457 | ||
f6a9efaa DG |
458 | /* |
459 | * RCU safe free context structure. | |
460 | */ | |
461 | static void destroy_context_rcu(struct rcu_head *head) | |
462 | { | |
bec39940 DG |
463 | struct lttng_ht_node_ulong *node = |
464 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
465 | struct ltt_ust_context *ctx = |
466 | caa_container_of(node, struct ltt_ust_context, node); | |
467 | ||
468 | free(ctx); | |
469 | } | |
470 | ||
471 | /* | |
472 | * Cleanup UST context hash table. | |
473 | */ | |
7bd39047 | 474 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
475 | { |
476 | int ret; | |
bec39940 DG |
477 | struct lttng_ht_node_ulong *node; |
478 | struct lttng_ht_iter iter; | |
4623416f | 479 | struct ltt_ust_context *ctx; |
f6a9efaa | 480 | |
0525e9ae DG |
481 | assert(ht); |
482 | ||
36b588ed | 483 | rcu_read_lock(); |
bec39940 | 484 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
4623416f DG |
485 | /* Remove from ordered list. */ |
486 | ctx = caa_container_of(node, struct ltt_ust_context, node); | |
487 | cds_list_del(&ctx->list); | |
488 | /* Remove from channel's hash table. */ | |
bec39940 | 489 | ret = lttng_ht_del(ht, &iter); |
f6a9efaa DG |
490 | if (!ret) { |
491 | call_rcu(&node->head, destroy_context_rcu); | |
492 | } | |
f6a9efaa | 493 | } |
36b588ed | 494 | rcu_read_unlock(); |
ed52805d | 495 | |
0b2dc8df | 496 | ht_cleanup_push(ht); |
f6a9efaa DG |
497 | } |
498 | ||
97ee3a89 DG |
499 | /* |
500 | * Cleanup ust event structure. | |
501 | */ | |
502 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
503 | { | |
0525e9ae DG |
504 | assert(event); |
505 | ||
f6a9efaa | 506 | DBG2("Trace destroy UST event %s", event->attr.name); |
53a80697 | 507 | free(event->filter); |
97ee3a89 DG |
508 | free(event); |
509 | } | |
510 | ||
f6a9efaa DG |
511 | /* |
512 | * URCU intermediate call to complete destroy event. | |
513 | */ | |
514 | static void destroy_event_rcu(struct rcu_head *head) | |
515 | { | |
bec39940 DG |
516 | struct lttng_ht_node_str *node = |
517 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
518 | struct ltt_ust_event *event = |
519 | caa_container_of(node, struct ltt_ust_event, node); | |
520 | ||
521 | trace_ust_destroy_event(event); | |
522 | } | |
523 | ||
284d8f55 DG |
524 | /* |
525 | * Cleanup UST events hashtable. | |
526 | */ | |
7bd39047 | 527 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
528 | { |
529 | int ret; | |
bec39940 DG |
530 | struct lttng_ht_node_str *node; |
531 | struct lttng_ht_iter iter; | |
ed52805d | 532 | |
0525e9ae DG |
533 | assert(events); |
534 | ||
36b588ed | 535 | rcu_read_lock(); |
bec39940 DG |
536 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
537 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
538 | assert(!ret); |
539 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 540 | } |
36b588ed | 541 | rcu_read_unlock(); |
ed52805d | 542 | |
0b2dc8df | 543 | ht_cleanup_push(events); |
ed52805d DG |
544 | } |
545 | ||
97ee3a89 DG |
546 | /* |
547 | * Cleanup ust channel structure. | |
36b588ed MD |
548 | * |
549 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 550 | */ |
36b588ed | 551 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 552 | { |
0525e9ae DG |
553 | assert(channel); |
554 | ||
f6a9efaa | 555 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 556 | |
7bd39047 DG |
557 | /* Destroying all events of the channel */ |
558 | destroy_events(channel->events); | |
559 | /* Destroying all context of the channel */ | |
560 | destroy_contexts(channel->ctx); | |
97ee3a89 | 561 | |
97ee3a89 | 562 | free(channel); |
f6a9efaa DG |
563 | } |
564 | ||
565 | /* | |
566 | * URCU intermediate call to complete destroy channel. | |
567 | */ | |
568 | static void destroy_channel_rcu(struct rcu_head *head) | |
569 | { | |
bec39940 DG |
570 | struct lttng_ht_node_str *node = |
571 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
572 | struct ltt_ust_channel *channel = |
573 | caa_container_of(node, struct ltt_ust_channel, node); | |
574 | ||
36b588ed MD |
575 | _trace_ust_destroy_channel(channel); |
576 | } | |
577 | ||
578 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
579 | { | |
580 | call_rcu(&channel->node.head, destroy_channel_rcu); | |
97ee3a89 DG |
581 | } |
582 | ||
d5979e4a DG |
583 | /* |
584 | * Remove an UST channel from a channel HT. | |
585 | */ | |
586 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
587 | struct ltt_ust_channel *channel) | |
588 | { | |
589 | int ret; | |
590 | struct lttng_ht_iter iter; | |
591 | ||
592 | assert(ht); | |
593 | assert(channel); | |
594 | ||
595 | iter.iter.node = &channel->node.node; | |
596 | ret = lttng_ht_del(ht, &iter); | |
597 | assert(!ret); | |
598 | } | |
599 | ||
97ee3a89 DG |
600 | /* |
601 | * Cleanup ust metadata structure. | |
602 | */ | |
603 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
604 | { | |
0525e9ae DG |
605 | assert(metadata); |
606 | ||
abc9138a MD |
607 | if (!metadata->handle) { |
608 | return; | |
609 | } | |
f6a9efaa | 610 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
611 | free(metadata); |
612 | } | |
613 | ||
614 | /* | |
f6a9efaa | 615 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 616 | */ |
bec39940 | 617 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
618 | { |
619 | int ret; | |
bec39940 DG |
620 | struct lttng_ht_node_str *node; |
621 | struct lttng_ht_iter iter; | |
f6a9efaa | 622 | |
0525e9ae DG |
623 | assert(channels); |
624 | ||
24d1723f DG |
625 | rcu_read_lock(); |
626 | ||
bec39940 DG |
627 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
628 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
629 | assert(!ret); |
630 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 631 | } |
36b588ed | 632 | rcu_read_unlock(); |
ed52805d | 633 | |
0b2dc8df | 634 | ht_cleanup_push(channels); |
f6a9efaa DG |
635 | } |
636 | ||
f6a9efaa DG |
637 | /* |
638 | * Cleanup UST global domain. | |
639 | */ | |
640 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
641 | { | |
0525e9ae DG |
642 | assert(dom); |
643 | ||
f6a9efaa DG |
644 | destroy_channels(dom->channels); |
645 | } | |
97ee3a89 | 646 | |
f6a9efaa DG |
647 | /* |
648 | * Cleanup ust session structure | |
36b588ed MD |
649 | * |
650 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
651 | */ |
652 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
653 | { | |
7972aab2 DG |
654 | struct buffer_reg_uid *reg, *sreg; |
655 | ||
0525e9ae | 656 | assert(session); |
97ee3a89 | 657 | |
77c5447b | 658 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 659 | |
f6a9efaa DG |
660 | /* Cleaning up UST domain */ |
661 | destroy_domain_global(&session->domain_global); | |
7972aab2 DG |
662 | |
663 | /* Cleanup UID buffer registry object(s). */ | |
664 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
665 | lnode) { | |
666 | cds_list_del(®->lnode); | |
667 | buffer_reg_uid_remove(reg); | |
668 | buffer_reg_uid_destroy(reg, session->consumer); | |
669 | } | |
44d3bd01 | 670 | |
3f8e211f DG |
671 | consumer_destroy_output(session->consumer); |
672 | consumer_destroy_output(session->tmp_consumer); | |
673 | ||
97ee3a89 DG |
674 | free(session); |
675 | } |