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 | /* |
f6a9efaa | 119 | * Find the channel in the hashtable. |
0177d773 | 120 | */ |
bec39940 | 121 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 122 | char *name) |
0177d773 | 123 | { |
bec39940 DG |
124 | struct lttng_ht_node_str *node; |
125 | struct lttng_ht_iter iter; | |
0177d773 | 126 | |
f6a9efaa | 127 | rcu_read_lock(); |
bec39940 DG |
128 | lttng_ht_lookup(ht, (void *)name, &iter); |
129 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa DG |
130 | if (node == NULL) { |
131 | rcu_read_unlock(); | |
44d3bd01 DG |
132 | goto error; |
133 | } | |
f6a9efaa | 134 | rcu_read_unlock(); |
44d3bd01 | 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 | /* | |
f6a9efaa | 146 | * Find the event in the hashtable. |
97ee3a89 | 147 | */ |
18eace3b DG |
148 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
149 | char *name, struct lttng_filter_bytecode *filter, int loglevel) | |
97ee3a89 | 150 | { |
bec39940 DG |
151 | struct lttng_ht_node_str *node; |
152 | struct lttng_ht_iter iter; | |
18eace3b | 153 | struct ltt_ust_ht_key key; |
97ee3a89 | 154 | |
18eace3b DG |
155 | assert(name); |
156 | assert(ht); | |
157 | ||
158 | key.name = name; | |
159 | key.filter = filter; | |
160 | key.loglevel = loglevel; | |
161 | ||
18eace3b DG |
162 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
163 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 164 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 165 | if (node == NULL) { |
97ee3a89 DG |
166 | goto error; |
167 | } | |
168 | ||
18eace3b | 169 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
170 | |
171 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
172 | |
173 | error: | |
18eace3b | 174 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
175 | return NULL; |
176 | } | |
177 | ||
178 | /* | |
179 | * Allocate and initialize a ust session data structure. | |
180 | * | |
181 | * Return pointer to structure or NULL. | |
182 | */ | |
fc4705fe | 183 | struct ltt_ust_session *trace_ust_create_session(char *path, |
fdd9eb17 | 184 | 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 | |
f6a9efaa | 199 | /* Alloc UST domain hash tables */ |
bec39940 DG |
200 | lus->domain_pid = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
201 | lus->domain_exec = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa DG |
202 | |
203 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 204 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
44d3bd01 | 205 | |
00e2e675 DG |
206 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
207 | if (lus->consumer == NULL) { | |
09a90bcd | 208 | goto error_consumer; |
00e2e675 DG |
209 | } |
210 | ||
211 | /* | |
212 | * The tmp_consumer stays NULL until a set_consumer_uri command is | |
213 | * executed. At this point, the consumer should be nullify until an | |
214 | * enable_consumer command. This assignment is symbolic since we've zmalloc | |
215 | * the struct. | |
216 | */ | |
217 | lus->tmp_consumer = NULL; | |
218 | ||
219 | /* Use the default consumer output which is the tracing session path. */ | |
a4b92340 | 220 | if (path && strlen(path) > 0) { |
c617c0c6 MD |
221 | int ret; |
222 | ||
a4b92340 DG |
223 | ret = snprintf(lus->consumer->dst.trace_path, PATH_MAX, |
224 | "%s" DEFAULT_UST_TRACE_DIR, path); | |
225 | if (ret < 0) { | |
226 | PERROR("snprintf UST consumer trace path"); | |
09a90bcd | 227 | goto error_path; |
a4b92340 DG |
228 | } |
229 | ||
230 | /* Set session path */ | |
231 | ret = snprintf(lus->pathname, PATH_MAX, "%s" DEFAULT_UST_TRACE_DIR, | |
232 | path); | |
233 | if (ret < 0) { | |
234 | PERROR("snprintf kernel traces path"); | |
09a90bcd | 235 | goto error_path; |
a4b92340 | 236 | } |
0177d773 DG |
237 | } |
238 | ||
44d3bd01 DG |
239 | DBG2("UST trace session create successful"); |
240 | ||
97ee3a89 DG |
241 | return lus; |
242 | ||
09a90bcd DG |
243 | error_path: |
244 | consumer_destroy_output(lus->consumer); | |
245 | error_consumer: | |
a2c0da86 MD |
246 | lttng_ht_destroy(lus->domain_global.channels); |
247 | lttng_ht_destroy(lus->domain_exec); | |
248 | lttng_ht_destroy(lus->domain_pid); | |
44844c29 | 249 | free(lus); |
97ee3a89 DG |
250 | error: |
251 | return NULL; | |
252 | } | |
253 | ||
254 | /* | |
255 | * Allocate and initialize a ust channel data structure. | |
256 | * | |
257 | * Return pointer to structure or NULL. | |
258 | */ | |
44d3bd01 DG |
259 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan, |
260 | char *path) | |
97ee3a89 DG |
261 | { |
262 | int ret; | |
263 | struct ltt_ust_channel *luc; | |
264 | ||
0525e9ae DG |
265 | assert(chan); |
266 | assert(path); | |
267 | ||
37357452 | 268 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 269 | if (luc == NULL) { |
df0f840b | 270 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
271 | goto error; |
272 | } | |
273 | ||
44d3bd01 | 274 | /* Copy UST channel attributes */ |
48842b30 DG |
275 | luc->attr.overwrite = chan->attr.overwrite; |
276 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
277 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
278 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
279 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 280 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
281 | |
282 | /* Translate to UST output enum */ | |
283 | switch (luc->attr.output) { | |
284 | default: | |
285 | luc->attr.output = LTTNG_UST_MMAP; | |
286 | break; | |
97ee3a89 | 287 | } |
97ee3a89 | 288 | |
97ee3a89 | 289 | /* Copy channel name */ |
0a1459bb | 290 | strncpy(luc->name, chan->name, sizeof(luc->name)); |
97ee3a89 DG |
291 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
292 | ||
f6a9efaa | 293 | /* Init node */ |
bec39940 | 294 | lttng_ht_node_init_str(&luc->node, luc->name); |
f6a9efaa | 295 | /* Alloc hash tables */ |
bec39940 DG |
296 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
297 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 298 | |
97ee3a89 | 299 | /* Set trace output path */ |
48842b30 | 300 | ret = snprintf(luc->pathname, PATH_MAX, "%s", path); |
97ee3a89 | 301 | if (ret < 0) { |
df0f840b | 302 | PERROR("asprintf ust create channel"); |
44844c29 | 303 | goto error_free_channel; |
97ee3a89 DG |
304 | } |
305 | ||
f6a9efaa DG |
306 | DBG2("Trace UST channel %s created", luc->name); |
307 | ||
97ee3a89 DG |
308 | return luc; |
309 | ||
44844c29 | 310 | error_free_channel: |
a2c0da86 MD |
311 | lttng_ht_destroy(luc->ctx); |
312 | lttng_ht_destroy(luc->events); | |
44844c29 | 313 | free(luc); |
97ee3a89 DG |
314 | error: |
315 | return NULL; | |
316 | } | |
317 | ||
318 | /* | |
319 | * Allocate and initialize a ust event. Set name and event type. | |
320 | * | |
321 | * Return pointer to structure or NULL. | |
322 | */ | |
025faf73 DG |
323 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
324 | struct lttng_filter_bytecode *filter) | |
97ee3a89 DG |
325 | { |
326 | struct ltt_ust_event *lue; | |
97ee3a89 | 327 | |
0525e9ae DG |
328 | assert(ev); |
329 | ||
37357452 | 330 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 331 | if (lue == NULL) { |
ba7f0ae5 | 332 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
333 | goto error; |
334 | } | |
335 | ||
336 | switch (ev->type) { | |
337 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 338 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
339 | break; |
340 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 341 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
342 | break; |
343 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 344 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
345 | break; |
346 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 347 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
348 | break; |
349 | default: | |
350 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 351 | goto error_free_event; |
97ee3a89 DG |
352 | } |
353 | ||
354 | /* Copy event name */ | |
44d3bd01 DG |
355 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
356 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 357 | |
0cda4f28 | 358 | switch (ev->loglevel_type) { |
8005f29a MD |
359 | case LTTNG_EVENT_LOGLEVEL_ALL: |
360 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 361 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 362 | break; |
8005f29a MD |
363 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
364 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 365 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
366 | break; |
367 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
368 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 369 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
370 | break; |
371 | default: | |
4431494b | 372 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
373 | goto error_free_event; |
374 | } | |
375 | ||
025faf73 DG |
376 | /* Same layout. */ |
377 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; | |
0cda4f28 | 378 | |
f6a9efaa | 379 | /* Init node */ |
bec39940 | 380 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 381 | |
300b8fd5 MD |
382 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
383 | lue->attr.name, lue->attr.loglevel_type, | |
384 | lue->attr.loglevel); | |
284d8f55 | 385 | |
97ee3a89 DG |
386 | return lue; |
387 | ||
44844c29 MD |
388 | error_free_event: |
389 | free(lue); | |
97ee3a89 DG |
390 | error: |
391 | return NULL; | |
392 | } | |
393 | ||
394 | /* | |
395 | * Allocate and initialize a ust metadata. | |
396 | * | |
397 | * Return pointer to structure or NULL. | |
398 | */ | |
399 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
400 | { | |
401 | int ret; | |
402 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 403 | |
0525e9ae DG |
404 | assert(path); |
405 | ||
3a009adb | 406 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 407 | if (lum == NULL) { |
df0f840b | 408 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
409 | goto error; |
410 | } | |
411 | ||
412 | /* Set default attributes */ | |
44d3bd01 | 413 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 414 | lum->attr.subbuf_size = default_get_metadata_subbuf_size(); |
44d3bd01 DG |
415 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
416 | lum->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER; | |
417 | lum->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER; | |
d41f73b7 | 418 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 419 | |
97ee3a89 DG |
420 | lum->handle = -1; |
421 | /* Set metadata trace path */ | |
f6a9efaa | 422 | ret = snprintf(lum->pathname, PATH_MAX, "%s/metadata", path); |
97ee3a89 | 423 | if (ret < 0) { |
df0f840b | 424 | PERROR("asprintf ust metadata"); |
44844c29 | 425 | goto error_free_metadata; |
97ee3a89 DG |
426 | } |
427 | ||
428 | return lum; | |
429 | ||
44844c29 MD |
430 | error_free_metadata: |
431 | free(lum); | |
97ee3a89 DG |
432 | error: |
433 | return NULL; | |
434 | } | |
435 | ||
55cc08a6 DG |
436 | /* |
437 | * Allocate and initialize an UST context. | |
438 | * | |
439 | * Return pointer to structure or NULL. | |
440 | */ | |
441 | struct ltt_ust_context *trace_ust_create_context( | |
442 | struct lttng_event_context *ctx) | |
443 | { | |
444 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
445 | enum lttng_ust_context_type utype; |
446 | ||
0525e9ae DG |
447 | assert(ctx); |
448 | ||
9197c5c4 MD |
449 | switch (ctx->ctx) { |
450 | case LTTNG_EVENT_CONTEXT_VTID: | |
451 | utype = LTTNG_UST_CONTEXT_VTID; | |
452 | break; | |
453 | case LTTNG_EVENT_CONTEXT_VPID: | |
454 | utype = LTTNG_UST_CONTEXT_VPID; | |
455 | break; | |
456 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
457 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
458 | break; | |
459 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
460 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
461 | break; | |
462 | default: | |
463 | ERR("Invalid UST context"); | |
464 | return NULL; | |
465 | } | |
55cc08a6 DG |
466 | |
467 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
468 | if (uctx == NULL) { | |
469 | PERROR("zmalloc ltt_ust_context"); | |
470 | goto error; | |
471 | } | |
472 | ||
9197c5c4 | 473 | uctx->ctx.ctx = utype; |
bec39940 | 474 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
475 | |
476 | return uctx; | |
477 | ||
478 | error: | |
479 | return NULL; | |
480 | } | |
481 | ||
f6a9efaa DG |
482 | /* |
483 | * RCU safe free context structure. | |
484 | */ | |
485 | static void destroy_context_rcu(struct rcu_head *head) | |
486 | { | |
bec39940 DG |
487 | struct lttng_ht_node_ulong *node = |
488 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
489 | struct ltt_ust_context *ctx = |
490 | caa_container_of(node, struct ltt_ust_context, node); | |
491 | ||
492 | free(ctx); | |
493 | } | |
494 | ||
495 | /* | |
496 | * Cleanup UST context hash table. | |
497 | */ | |
7bd39047 | 498 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
499 | { |
500 | int ret; | |
bec39940 DG |
501 | struct lttng_ht_node_ulong *node; |
502 | struct lttng_ht_iter iter; | |
f6a9efaa | 503 | |
0525e9ae DG |
504 | assert(ht); |
505 | ||
bec39940 DG |
506 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
507 | ret = lttng_ht_del(ht, &iter); | |
f6a9efaa DG |
508 | if (!ret) { |
509 | call_rcu(&node->head, destroy_context_rcu); | |
510 | } | |
f6a9efaa | 511 | } |
ed52805d | 512 | |
bec39940 | 513 | lttng_ht_destroy(ht); |
f6a9efaa DG |
514 | } |
515 | ||
97ee3a89 DG |
516 | /* |
517 | * Cleanup ust event structure. | |
518 | */ | |
519 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
520 | { | |
0525e9ae DG |
521 | assert(event); |
522 | ||
f6a9efaa | 523 | DBG2("Trace destroy UST event %s", event->attr.name); |
53a80697 | 524 | free(event->filter); |
97ee3a89 DG |
525 | free(event); |
526 | } | |
527 | ||
f6a9efaa DG |
528 | /* |
529 | * URCU intermediate call to complete destroy event. | |
530 | */ | |
531 | static void destroy_event_rcu(struct rcu_head *head) | |
532 | { | |
bec39940 DG |
533 | struct lttng_ht_node_str *node = |
534 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
535 | struct ltt_ust_event *event = |
536 | caa_container_of(node, struct ltt_ust_event, node); | |
537 | ||
538 | trace_ust_destroy_event(event); | |
539 | } | |
540 | ||
284d8f55 DG |
541 | /* |
542 | * Cleanup UST events hashtable. | |
543 | */ | |
7bd39047 | 544 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
545 | { |
546 | int ret; | |
bec39940 DG |
547 | struct lttng_ht_node_str *node; |
548 | struct lttng_ht_iter iter; | |
ed52805d | 549 | |
0525e9ae DG |
550 | assert(events); |
551 | ||
bec39940 DG |
552 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
553 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
554 | assert(!ret); |
555 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d DG |
556 | } |
557 | ||
bec39940 | 558 | lttng_ht_destroy(events); |
ed52805d DG |
559 | } |
560 | ||
97ee3a89 DG |
561 | /* |
562 | * Cleanup ust channel structure. | |
563 | */ | |
564 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
565 | { | |
0525e9ae DG |
566 | assert(channel); |
567 | ||
f6a9efaa | 568 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 569 | |
f6a9efaa DG |
570 | rcu_read_lock(); |
571 | ||
7bd39047 DG |
572 | /* Destroying all events of the channel */ |
573 | destroy_events(channel->events); | |
574 | /* Destroying all context of the channel */ | |
575 | destroy_contexts(channel->ctx); | |
97ee3a89 | 576 | |
97ee3a89 | 577 | free(channel); |
f6a9efaa DG |
578 | |
579 | rcu_read_unlock(); | |
580 | } | |
581 | ||
582 | /* | |
583 | * URCU intermediate call to complete destroy channel. | |
584 | */ | |
585 | static void destroy_channel_rcu(struct rcu_head *head) | |
586 | { | |
bec39940 DG |
587 | struct lttng_ht_node_str *node = |
588 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
589 | struct ltt_ust_channel *channel = |
590 | caa_container_of(node, struct ltt_ust_channel, node); | |
591 | ||
592 | trace_ust_destroy_channel(channel); | |
97ee3a89 DG |
593 | } |
594 | ||
595 | /* | |
596 | * Cleanup ust metadata structure. | |
597 | */ | |
598 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
599 | { | |
0525e9ae DG |
600 | assert(metadata); |
601 | ||
abc9138a MD |
602 | if (!metadata->handle) { |
603 | return; | |
604 | } | |
f6a9efaa | 605 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
606 | free(metadata); |
607 | } | |
608 | ||
609 | /* | |
f6a9efaa | 610 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 611 | */ |
bec39940 | 612 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
613 | { |
614 | int ret; | |
bec39940 DG |
615 | struct lttng_ht_node_str *node; |
616 | struct lttng_ht_iter iter; | |
f6a9efaa | 617 | |
0525e9ae DG |
618 | assert(channels); |
619 | ||
24d1723f DG |
620 | rcu_read_lock(); |
621 | ||
bec39940 DG |
622 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
623 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
624 | assert(!ret); |
625 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 626 | } |
ed52805d | 627 | |
bec39940 | 628 | lttng_ht_destroy(channels); |
24d1723f DG |
629 | |
630 | rcu_read_unlock(); | |
f6a9efaa DG |
631 | } |
632 | ||
633 | /* | |
634 | * Cleanup UST pid domain. | |
635 | */ | |
bec39940 | 636 | static void destroy_domain_pid(struct lttng_ht *ht) |
f6a9efaa DG |
637 | { |
638 | int ret; | |
bec39940 | 639 | struct lttng_ht_iter iter; |
ed52805d | 640 | struct ltt_ust_domain_pid *dpid; |
f6a9efaa | 641 | |
0525e9ae DG |
642 | assert(ht); |
643 | ||
bec39940 DG |
644 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dpid, node.node) { |
645 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
646 | assert(!ret); |
647 | destroy_channels(dpid->channels); | |
f6a9efaa | 648 | } |
ed52805d | 649 | |
bec39940 | 650 | lttng_ht_destroy(ht); |
f6a9efaa DG |
651 | } |
652 | ||
653 | /* | |
654 | * Cleanup UST exec name domain. | |
655 | */ | |
bec39940 | 656 | static void destroy_domain_exec(struct lttng_ht *ht) |
97ee3a89 | 657 | { |
f6a9efaa | 658 | int ret; |
bec39940 | 659 | struct lttng_ht_iter iter; |
ed52805d | 660 | struct ltt_ust_domain_exec *dexec; |
f6a9efaa | 661 | |
0525e9ae DG |
662 | assert(ht); |
663 | ||
bec39940 DG |
664 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dexec, node.node) { |
665 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
666 | assert(!ret); |
667 | destroy_channels(dexec->channels); | |
f6a9efaa | 668 | } |
ed52805d | 669 | |
bec39940 | 670 | lttng_ht_destroy(ht); |
f6a9efaa | 671 | } |
97ee3a89 | 672 | |
f6a9efaa DG |
673 | /* |
674 | * Cleanup UST global domain. | |
675 | */ | |
676 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
677 | { | |
0525e9ae DG |
678 | assert(dom); |
679 | ||
f6a9efaa DG |
680 | destroy_channels(dom->channels); |
681 | } | |
97ee3a89 | 682 | |
f6a9efaa DG |
683 | /* |
684 | * Cleanup ust session structure | |
685 | */ | |
686 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
687 | { | |
0525e9ae | 688 | assert(session); |
97ee3a89 | 689 | |
f6a9efaa DG |
690 | rcu_read_lock(); |
691 | ||
fc4705fe | 692 | DBG2("Trace UST destroy session %u", session->id); |
f6a9efaa | 693 | |
f6a9efaa DG |
694 | /* Cleaning up UST domain */ |
695 | destroy_domain_global(&session->domain_global); | |
696 | destroy_domain_pid(session->domain_pid); | |
697 | destroy_domain_exec(session->domain_exec); | |
44d3bd01 | 698 | |
3f8e211f DG |
699 | consumer_destroy_output(session->consumer); |
700 | consumer_destroy_output(session->tmp_consumer); | |
701 | ||
97ee3a89 | 702 | free(session); |
f6a9efaa DG |
703 | |
704 | rcu_read_unlock(); | |
97ee3a89 | 705 | } |