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 DG |
26 | |
27 | #include "trace-ust.h" | |
28 | ||
025faf73 DG |
29 | /* |
30 | * Match function for the events hash table lookup. | |
31 | * | |
32 | * Matches by name only. Used by the disable command. | |
33 | */ | |
18eace3b DG |
34 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
35 | const void *_key) | |
36 | { | |
37 | struct ltt_ust_event *event; | |
38 | const char *name; | |
39 | ||
40 | assert(node); | |
41 | assert(_key); | |
42 | ||
43 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
44 | name = _key; | |
45 | ||
46 | /* Event name */ | |
47 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
48 | goto no_match; | |
49 | } | |
50 | ||
025faf73 | 51 | /* Match */ |
18eace3b DG |
52 | return 1; |
53 | ||
54 | no_match: | |
55 | return 0; | |
56 | } | |
57 | ||
025faf73 DG |
58 | /* |
59 | * Match function for the hash table lookup. | |
60 | * | |
61 | * It matches an ust event based on three attributes which are the event name, | |
62 | * the filter bytecode and the loglevel. | |
63 | */ | |
18eace3b DG |
64 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
65 | { | |
66 | struct ltt_ust_event *event; | |
67 | const struct ltt_ust_ht_key *key; | |
68 | ||
69 | assert(node); | |
70 | assert(_key); | |
71 | ||
72 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
73 | key = _key; | |
74 | ||
75 | /* Match the 3 elements of the key: name, filter and loglevel. */ | |
76 | ||
77 | /* Event name */ | |
78 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
79 | goto no_match; |
80 | } | |
81 | ||
82 | /* Event loglevel. */ | |
83 | if (event->attr.loglevel != key->loglevel) { | |
025faf73 DG |
84 | if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL |
85 | && key->loglevel == 0 && event->attr.loglevel == -1) { | |
18eace3b | 86 | /* |
025faf73 DG |
87 | * Match is accepted. This is because on event creation, the |
88 | * loglevel is set to -1 if the event loglevel type is ALL so 0 and | |
89 | * -1 are accepted for this loglevel type since 0 is the one set by | |
90 | * the API when receiving an enable event. | |
18eace3b DG |
91 | */ |
92 | } else { | |
18eace3b DG |
93 | goto no_match; |
94 | } | |
95 | } | |
96 | ||
97 | /* Only one of the filters is NULL, fail. */ | |
98 | if ((key->filter && !event->filter) || (!key->filter && event->filter)) { | |
18eace3b DG |
99 | goto no_match; |
100 | } | |
101 | ||
025faf73 DG |
102 | if (key->filter && event->filter) { |
103 | /* Both filters exists, check length followed by the bytecode. */ | |
104 | if (event->filter->len != key->filter->len || | |
105 | memcmp(event->filter->data, key->filter->data, | |
106 | event->filter->len) != 0) { | |
107 | goto no_match; | |
108 | } | |
18eace3b DG |
109 | } |
110 | ||
025faf73 DG |
111 | /* Match. */ |
112 | return 1; | |
18eace3b DG |
113 | |
114 | no_match: | |
115 | return 0; | |
18eace3b DG |
116 | } |
117 | ||
0177d773 | 118 | /* |
2223c96f DG |
119 | * Find the channel in the hashtable and return channel pointer. RCU read side |
120 | * lock MUST be acquired before calling this. | |
0177d773 | 121 | */ |
bec39940 | 122 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 123 | char *name) |
0177d773 | 124 | { |
bec39940 DG |
125 | struct lttng_ht_node_str *node; |
126 | struct lttng_ht_iter iter; | |
0177d773 | 127 | |
bec39940 DG |
128 | lttng_ht_lookup(ht, (void *)name, &iter); |
129 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 130 | if (node == NULL) { |
44d3bd01 DG |
131 | goto error; |
132 | } | |
133 | ||
f6a9efaa | 134 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 135 | |
f6a9efaa | 136 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
137 | |
138 | error: | |
f6a9efaa | 139 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
140 | return NULL; |
141 | } | |
142 | ||
143 | /* | |
2223c96f DG |
144 | * Find the event in the hashtable and return event pointer. RCU read side lock |
145 | * MUST be acquired before calling this. | |
97ee3a89 | 146 | */ |
18eace3b DG |
147 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
148 | char *name, struct lttng_filter_bytecode *filter, int loglevel) | |
97ee3a89 | 149 | { |
bec39940 DG |
150 | struct lttng_ht_node_str *node; |
151 | struct lttng_ht_iter iter; | |
18eace3b | 152 | struct ltt_ust_ht_key key; |
97ee3a89 | 153 | |
18eace3b DG |
154 | assert(name); |
155 | assert(ht); | |
156 | ||
157 | key.name = name; | |
158 | key.filter = filter; | |
159 | key.loglevel = loglevel; | |
160 | ||
18eace3b DG |
161 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
162 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 163 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 164 | if (node == NULL) { |
97ee3a89 DG |
165 | goto error; |
166 | } | |
167 | ||
18eace3b | 168 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
169 | |
170 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
171 | |
172 | error: | |
18eace3b | 173 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
174 | return NULL; |
175 | } | |
176 | ||
177 | /* | |
178 | * Allocate and initialize a ust session data structure. | |
179 | * | |
180 | * Return pointer to structure or NULL. | |
181 | */ | |
fc4705fe | 182 | struct ltt_ust_session *trace_ust_create_session(char *path, |
fdd9eb17 | 183 | unsigned int session_id) |
97ee3a89 DG |
184 | { |
185 | struct ltt_ust_session *lus; | |
186 | ||
187 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 188 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 189 | if (lus == NULL) { |
ba7f0ae5 | 190 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
191 | goto error; |
192 | } | |
193 | ||
194 | /* Init data structure */ | |
a991f516 | 195 | lus->id = session_id; |
36dc12cc | 196 | lus->start_trace = 0; |
97ee3a89 | 197 | |
f6a9efaa | 198 | /* Alloc UST domain hash tables */ |
bec39940 DG |
199 | lus->domain_pid = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
200 | lus->domain_exec = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa DG |
201 | |
202 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 203 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
44d3bd01 | 204 | |
00e2e675 DG |
205 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
206 | if (lus->consumer == NULL) { | |
09a90bcd | 207 | goto error_consumer; |
00e2e675 DG |
208 | } |
209 | ||
210 | /* | |
211 | * The tmp_consumer stays NULL until a set_consumer_uri command is | |
212 | * executed. At this point, the consumer should be nullify until an | |
213 | * enable_consumer command. This assignment is symbolic since we've zmalloc | |
214 | * the struct. | |
215 | */ | |
216 | lus->tmp_consumer = NULL; | |
217 | ||
218 | /* Use the default consumer output which is the tracing session path. */ | |
9d035200 | 219 | if (*path != '\0') { |
c617c0c6 MD |
220 | int ret; |
221 | ||
a4b92340 DG |
222 | ret = snprintf(lus->consumer->dst.trace_path, PATH_MAX, |
223 | "%s" DEFAULT_UST_TRACE_DIR, path); | |
224 | if (ret < 0) { | |
225 | PERROR("snprintf UST consumer trace path"); | |
09a90bcd | 226 | goto error_path; |
a4b92340 DG |
227 | } |
228 | ||
229 | /* Set session path */ | |
230 | ret = snprintf(lus->pathname, PATH_MAX, "%s" DEFAULT_UST_TRACE_DIR, | |
231 | path); | |
232 | if (ret < 0) { | |
233 | PERROR("snprintf kernel traces path"); | |
09a90bcd | 234 | goto error_path; |
a4b92340 | 235 | } |
0177d773 DG |
236 | } |
237 | ||
44d3bd01 DG |
238 | DBG2("UST trace session create successful"); |
239 | ||
97ee3a89 DG |
240 | return lus; |
241 | ||
09a90bcd DG |
242 | error_path: |
243 | consumer_destroy_output(lus->consumer); | |
244 | error_consumer: | |
a2c0da86 MD |
245 | lttng_ht_destroy(lus->domain_global.channels); |
246 | lttng_ht_destroy(lus->domain_exec); | |
247 | lttng_ht_destroy(lus->domain_pid); | |
44844c29 | 248 | free(lus); |
97ee3a89 DG |
249 | error: |
250 | return NULL; | |
251 | } | |
252 | ||
253 | /* | |
254 | * Allocate and initialize a ust channel data structure. | |
255 | * | |
256 | * Return pointer to structure or NULL. | |
257 | */ | |
44d3bd01 DG |
258 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan, |
259 | char *path) | |
97ee3a89 DG |
260 | { |
261 | int ret; | |
262 | struct ltt_ust_channel *luc; | |
263 | ||
0525e9ae DG |
264 | assert(chan); |
265 | assert(path); | |
266 | ||
37357452 | 267 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 268 | if (luc == NULL) { |
df0f840b | 269 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
270 | goto error; |
271 | } | |
272 | ||
44d3bd01 | 273 | /* Copy UST channel attributes */ |
48842b30 DG |
274 | luc->attr.overwrite = chan->attr.overwrite; |
275 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
276 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
277 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
278 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 279 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
280 | |
281 | /* Translate to UST output enum */ | |
282 | switch (luc->attr.output) { | |
283 | default: | |
284 | luc->attr.output = LTTNG_UST_MMAP; | |
285 | break; | |
97ee3a89 | 286 | } |
97ee3a89 | 287 | |
97ee3a89 | 288 | /* Copy channel name */ |
0a1459bb | 289 | strncpy(luc->name, chan->name, sizeof(luc->name)); |
97ee3a89 DG |
290 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
291 | ||
f6a9efaa | 292 | /* Init node */ |
bec39940 | 293 | lttng_ht_node_init_str(&luc->node, luc->name); |
f6a9efaa | 294 | /* Alloc hash tables */ |
bec39940 DG |
295 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
296 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 297 | |
97ee3a89 | 298 | /* Set trace output path */ |
48842b30 | 299 | ret = snprintf(luc->pathname, PATH_MAX, "%s", path); |
97ee3a89 | 300 | if (ret < 0) { |
df0f840b | 301 | PERROR("asprintf ust create channel"); |
44844c29 | 302 | goto error_free_channel; |
97ee3a89 DG |
303 | } |
304 | ||
f6a9efaa DG |
305 | DBG2("Trace UST channel %s created", luc->name); |
306 | ||
97ee3a89 DG |
307 | return luc; |
308 | ||
44844c29 | 309 | error_free_channel: |
a2c0da86 MD |
310 | lttng_ht_destroy(luc->ctx); |
311 | lttng_ht_destroy(luc->events); | |
44844c29 | 312 | free(luc); |
97ee3a89 DG |
313 | error: |
314 | return NULL; | |
315 | } | |
316 | ||
317 | /* | |
318 | * Allocate and initialize a ust event. Set name and event type. | |
319 | * | |
320 | * Return pointer to structure or NULL. | |
321 | */ | |
025faf73 DG |
322 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
323 | struct lttng_filter_bytecode *filter) | |
97ee3a89 DG |
324 | { |
325 | struct ltt_ust_event *lue; | |
97ee3a89 | 326 | |
0525e9ae DG |
327 | assert(ev); |
328 | ||
37357452 | 329 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 330 | if (lue == NULL) { |
ba7f0ae5 | 331 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
332 | goto error; |
333 | } | |
334 | ||
335 | switch (ev->type) { | |
336 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 337 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
338 | break; |
339 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 340 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
341 | break; |
342 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 343 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
344 | break; |
345 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 346 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
347 | break; |
348 | default: | |
349 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 350 | goto error_free_event; |
97ee3a89 DG |
351 | } |
352 | ||
353 | /* Copy event name */ | |
44d3bd01 DG |
354 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
355 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 356 | |
0cda4f28 | 357 | switch (ev->loglevel_type) { |
8005f29a MD |
358 | case LTTNG_EVENT_LOGLEVEL_ALL: |
359 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 360 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 361 | break; |
8005f29a MD |
362 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
363 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 364 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
365 | break; |
366 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
367 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 368 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
369 | break; |
370 | default: | |
4431494b | 371 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
372 | goto error_free_event; |
373 | } | |
374 | ||
025faf73 DG |
375 | /* Same layout. */ |
376 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; | |
0cda4f28 | 377 | |
f6a9efaa | 378 | /* Init node */ |
bec39940 | 379 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 380 | |
300b8fd5 MD |
381 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
382 | lue->attr.name, lue->attr.loglevel_type, | |
383 | lue->attr.loglevel); | |
284d8f55 | 384 | |
97ee3a89 DG |
385 | return lue; |
386 | ||
44844c29 MD |
387 | error_free_event: |
388 | free(lue); | |
97ee3a89 DG |
389 | error: |
390 | return NULL; | |
391 | } | |
392 | ||
393 | /* | |
394 | * Allocate and initialize a ust metadata. | |
395 | * | |
396 | * Return pointer to structure or NULL. | |
397 | */ | |
398 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
399 | { | |
400 | int ret; | |
401 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 402 | |
0525e9ae DG |
403 | assert(path); |
404 | ||
3a009adb | 405 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 406 | if (lum == NULL) { |
df0f840b | 407 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
408 | goto error; |
409 | } | |
410 | ||
411 | /* Set default attributes */ | |
44d3bd01 | 412 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 413 | lum->attr.subbuf_size = default_get_metadata_subbuf_size(); |
44d3bd01 | 414 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
6bb9e85f MD |
415 | lum->attr.switch_timer_interval = DEFAULT_UST_CHANNEL_SWITCH_TIMER; |
416 | lum->attr.read_timer_interval = DEFAULT_UST_CHANNEL_READ_TIMER; | |
d41f73b7 | 417 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 418 | |
97ee3a89 DG |
419 | lum->handle = -1; |
420 | /* Set metadata trace path */ | |
30079b6b | 421 | ret = snprintf(lum->pathname, PATH_MAX, "%s/" DEFAULT_METADATA_NAME, path); |
97ee3a89 | 422 | if (ret < 0) { |
df0f840b | 423 | PERROR("asprintf ust metadata"); |
44844c29 | 424 | goto error_free_metadata; |
97ee3a89 DG |
425 | } |
426 | ||
427 | return lum; | |
428 | ||
44844c29 MD |
429 | error_free_metadata: |
430 | free(lum); | |
97ee3a89 DG |
431 | error: |
432 | return NULL; | |
433 | } | |
434 | ||
55cc08a6 DG |
435 | /* |
436 | * Allocate and initialize an UST context. | |
437 | * | |
438 | * Return pointer to structure or NULL. | |
439 | */ | |
440 | struct ltt_ust_context *trace_ust_create_context( | |
441 | struct lttng_event_context *ctx) | |
442 | { | |
443 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
444 | enum lttng_ust_context_type utype; |
445 | ||
0525e9ae DG |
446 | assert(ctx); |
447 | ||
9197c5c4 MD |
448 | switch (ctx->ctx) { |
449 | case LTTNG_EVENT_CONTEXT_VTID: | |
450 | utype = LTTNG_UST_CONTEXT_VTID; | |
451 | break; | |
452 | case LTTNG_EVENT_CONTEXT_VPID: | |
453 | utype = LTTNG_UST_CONTEXT_VPID; | |
454 | break; | |
455 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
456 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
457 | break; | |
458 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
459 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
460 | break; | |
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); |
55cc08a6 DG |
474 | |
475 | return uctx; | |
476 | ||
477 | error: | |
478 | return NULL; | |
479 | } | |
480 | ||
f6a9efaa DG |
481 | /* |
482 | * RCU safe free context structure. | |
483 | */ | |
484 | static void destroy_context_rcu(struct rcu_head *head) | |
485 | { | |
bec39940 DG |
486 | struct lttng_ht_node_ulong *node = |
487 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
488 | struct ltt_ust_context *ctx = |
489 | caa_container_of(node, struct ltt_ust_context, node); | |
490 | ||
491 | free(ctx); | |
492 | } | |
493 | ||
494 | /* | |
495 | * Cleanup UST context hash table. | |
496 | */ | |
7bd39047 | 497 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
498 | { |
499 | int ret; | |
bec39940 DG |
500 | struct lttng_ht_node_ulong *node; |
501 | struct lttng_ht_iter iter; | |
f6a9efaa | 502 | |
0525e9ae DG |
503 | assert(ht); |
504 | ||
bec39940 DG |
505 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
506 | ret = lttng_ht_del(ht, &iter); | |
f6a9efaa DG |
507 | if (!ret) { |
508 | call_rcu(&node->head, destroy_context_rcu); | |
509 | } | |
f6a9efaa | 510 | } |
ed52805d | 511 | |
bec39940 | 512 | lttng_ht_destroy(ht); |
f6a9efaa DG |
513 | } |
514 | ||
97ee3a89 DG |
515 | /* |
516 | * Cleanup ust event structure. | |
517 | */ | |
518 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
519 | { | |
0525e9ae DG |
520 | assert(event); |
521 | ||
f6a9efaa | 522 | DBG2("Trace destroy UST event %s", event->attr.name); |
53a80697 | 523 | free(event->filter); |
97ee3a89 DG |
524 | free(event); |
525 | } | |
526 | ||
f6a9efaa DG |
527 | /* |
528 | * URCU intermediate call to complete destroy event. | |
529 | */ | |
530 | static void destroy_event_rcu(struct rcu_head *head) | |
531 | { | |
bec39940 DG |
532 | struct lttng_ht_node_str *node = |
533 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
534 | struct ltt_ust_event *event = |
535 | caa_container_of(node, struct ltt_ust_event, node); | |
536 | ||
537 | trace_ust_destroy_event(event); | |
538 | } | |
539 | ||
284d8f55 DG |
540 | /* |
541 | * Cleanup UST events hashtable. | |
542 | */ | |
7bd39047 | 543 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
544 | { |
545 | int ret; | |
bec39940 DG |
546 | struct lttng_ht_node_str *node; |
547 | struct lttng_ht_iter iter; | |
ed52805d | 548 | |
0525e9ae DG |
549 | assert(events); |
550 | ||
bec39940 DG |
551 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
552 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
553 | assert(!ret); |
554 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d DG |
555 | } |
556 | ||
bec39940 | 557 | lttng_ht_destroy(events); |
ed52805d DG |
558 | } |
559 | ||
97ee3a89 DG |
560 | /* |
561 | * Cleanup ust channel structure. | |
562 | */ | |
563 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
564 | { | |
0525e9ae DG |
565 | assert(channel); |
566 | ||
f6a9efaa | 567 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 568 | |
f6a9efaa DG |
569 | rcu_read_lock(); |
570 | ||
7bd39047 DG |
571 | /* Destroying all events of the channel */ |
572 | destroy_events(channel->events); | |
573 | /* Destroying all context of the channel */ | |
574 | destroy_contexts(channel->ctx); | |
97ee3a89 | 575 | |
97ee3a89 | 576 | free(channel); |
f6a9efaa DG |
577 | |
578 | rcu_read_unlock(); | |
579 | } | |
580 | ||
581 | /* | |
582 | * URCU intermediate call to complete destroy channel. | |
583 | */ | |
584 | static void destroy_channel_rcu(struct rcu_head *head) | |
585 | { | |
bec39940 DG |
586 | struct lttng_ht_node_str *node = |
587 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
588 | struct ltt_ust_channel *channel = |
589 | caa_container_of(node, struct ltt_ust_channel, node); | |
590 | ||
591 | trace_ust_destroy_channel(channel); | |
97ee3a89 DG |
592 | } |
593 | ||
594 | /* | |
595 | * Cleanup ust metadata structure. | |
596 | */ | |
597 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
598 | { | |
0525e9ae DG |
599 | assert(metadata); |
600 | ||
abc9138a MD |
601 | if (!metadata->handle) { |
602 | return; | |
603 | } | |
f6a9efaa | 604 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
605 | free(metadata); |
606 | } | |
607 | ||
608 | /* | |
f6a9efaa | 609 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 610 | */ |
bec39940 | 611 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
612 | { |
613 | int ret; | |
bec39940 DG |
614 | struct lttng_ht_node_str *node; |
615 | struct lttng_ht_iter iter; | |
f6a9efaa | 616 | |
0525e9ae DG |
617 | assert(channels); |
618 | ||
24d1723f DG |
619 | rcu_read_lock(); |
620 | ||
bec39940 DG |
621 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
622 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
623 | assert(!ret); |
624 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 625 | } |
ed52805d | 626 | |
bec39940 | 627 | lttng_ht_destroy(channels); |
24d1723f DG |
628 | |
629 | rcu_read_unlock(); | |
f6a9efaa DG |
630 | } |
631 | ||
632 | /* | |
633 | * Cleanup UST pid domain. | |
634 | */ | |
bec39940 | 635 | static void destroy_domain_pid(struct lttng_ht *ht) |
f6a9efaa DG |
636 | { |
637 | int ret; | |
bec39940 | 638 | struct lttng_ht_iter iter; |
ed52805d | 639 | struct ltt_ust_domain_pid *dpid; |
f6a9efaa | 640 | |
0525e9ae DG |
641 | assert(ht); |
642 | ||
bec39940 DG |
643 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dpid, node.node) { |
644 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
645 | assert(!ret); |
646 | destroy_channels(dpid->channels); | |
f6a9efaa | 647 | } |
ed52805d | 648 | |
bec39940 | 649 | lttng_ht_destroy(ht); |
f6a9efaa DG |
650 | } |
651 | ||
652 | /* | |
653 | * Cleanup UST exec name domain. | |
654 | */ | |
bec39940 | 655 | static void destroy_domain_exec(struct lttng_ht *ht) |
97ee3a89 | 656 | { |
f6a9efaa | 657 | int ret; |
bec39940 | 658 | struct lttng_ht_iter iter; |
ed52805d | 659 | struct ltt_ust_domain_exec *dexec; |
f6a9efaa | 660 | |
0525e9ae DG |
661 | assert(ht); |
662 | ||
bec39940 DG |
663 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dexec, node.node) { |
664 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
665 | assert(!ret); |
666 | destroy_channels(dexec->channels); | |
f6a9efaa | 667 | } |
ed52805d | 668 | |
bec39940 | 669 | lttng_ht_destroy(ht); |
f6a9efaa | 670 | } |
97ee3a89 | 671 | |
f6a9efaa DG |
672 | /* |
673 | * Cleanup UST global domain. | |
674 | */ | |
675 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
676 | { | |
0525e9ae DG |
677 | assert(dom); |
678 | ||
f6a9efaa DG |
679 | destroy_channels(dom->channels); |
680 | } | |
97ee3a89 | 681 | |
f6a9efaa DG |
682 | /* |
683 | * Cleanup ust session structure | |
684 | */ | |
685 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
686 | { | |
0525e9ae | 687 | assert(session); |
97ee3a89 | 688 | |
f6a9efaa DG |
689 | rcu_read_lock(); |
690 | ||
fc4705fe | 691 | DBG2("Trace UST destroy session %u", session->id); |
f6a9efaa | 692 | |
f6a9efaa DG |
693 | /* Cleaning up UST domain */ |
694 | destroy_domain_global(&session->domain_global); | |
695 | destroy_domain_pid(session->domain_pid); | |
696 | destroy_domain_exec(session->domain_exec); | |
44d3bd01 | 697 | |
3f8e211f DG |
698 | consumer_destroy_output(session->consumer); |
699 | consumer_destroy_output(session->tmp_consumer); | |
700 | ||
97ee3a89 | 701 | free(session); |
f6a9efaa DG |
702 | |
703 | rcu_read_unlock(); | |
97ee3a89 | 704 | } |