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 | ||
0177d773 | 29 | /* |
f6a9efaa | 30 | * Find the channel in the hashtable. |
0177d773 | 31 | */ |
bec39940 | 32 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 33 | char *name) |
0177d773 | 34 | { |
bec39940 DG |
35 | struct lttng_ht_node_str *node; |
36 | struct lttng_ht_iter iter; | |
0177d773 | 37 | |
f6a9efaa | 38 | rcu_read_lock(); |
bec39940 DG |
39 | lttng_ht_lookup(ht, (void *)name, &iter); |
40 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa DG |
41 | if (node == NULL) { |
42 | rcu_read_unlock(); | |
44d3bd01 DG |
43 | goto error; |
44 | } | |
f6a9efaa | 45 | rcu_read_unlock(); |
44d3bd01 | 46 | |
f6a9efaa | 47 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 48 | |
f6a9efaa | 49 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
50 | |
51 | error: | |
f6a9efaa | 52 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
53 | return NULL; |
54 | } | |
55 | ||
56 | /* | |
f6a9efaa | 57 | * Find the event in the hashtable. |
97ee3a89 | 58 | */ |
bec39940 | 59 | struct ltt_ust_event *trace_ust_find_event_by_name(struct lttng_ht *ht, |
f6a9efaa | 60 | char *name) |
97ee3a89 | 61 | { |
bec39940 DG |
62 | struct lttng_ht_node_str *node; |
63 | struct lttng_ht_iter iter; | |
97ee3a89 | 64 | |
f6a9efaa | 65 | rcu_read_lock(); |
bec39940 DG |
66 | lttng_ht_lookup(ht, (void *) name, &iter); |
67 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa DG |
68 | if (node == NULL) { |
69 | rcu_read_unlock(); | |
97ee3a89 DG |
70 | goto error; |
71 | } | |
f6a9efaa | 72 | rcu_read_unlock(); |
97ee3a89 | 73 | |
284d8f55 | 74 | DBG2("Trace UST event found by name %s", name); |
f6a9efaa DG |
75 | |
76 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
77 | |
78 | error: | |
284d8f55 | 79 | DBG2("Trace UST event NOT found by name %s", name); |
97ee3a89 DG |
80 | return NULL; |
81 | } | |
82 | ||
83 | /* | |
84 | * Allocate and initialize a ust session data structure. | |
85 | * | |
86 | * Return pointer to structure or NULL. | |
87 | */ | |
fc4705fe DG |
88 | struct ltt_ust_session *trace_ust_create_session(char *path, |
89 | unsigned int session_id, struct lttng_domain *domain) | |
97ee3a89 | 90 | { |
0177d773 | 91 | int ret; |
97ee3a89 DG |
92 | struct ltt_ust_session *lus; |
93 | ||
94 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 95 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 96 | if (lus == NULL) { |
ba7f0ae5 | 97 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
98 | goto error; |
99 | } | |
100 | ||
101 | /* Init data structure */ | |
a991f516 | 102 | lus->id = session_id; |
36dc12cc | 103 | lus->start_trace = 0; |
97ee3a89 | 104 | |
f6a9efaa | 105 | /* Alloc UST domain hash tables */ |
bec39940 DG |
106 | lus->domain_pid = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
107 | lus->domain_exec = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa DG |
108 | |
109 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 110 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
44d3bd01 | 111 | |
00e2e675 DG |
112 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
113 | if (lus->consumer == NULL) { | |
114 | goto error; | |
115 | } | |
116 | ||
117 | /* | |
118 | * The tmp_consumer stays NULL until a set_consumer_uri command is | |
119 | * executed. At this point, the consumer should be nullify until an | |
120 | * enable_consumer command. This assignment is symbolic since we've zmalloc | |
121 | * the struct. | |
122 | */ | |
123 | lus->tmp_consumer = NULL; | |
124 | ||
125 | /* Use the default consumer output which is the tracing session path. */ | |
126 | ret = snprintf(lus->consumer->dst.trace_path, PATH_MAX, "%s/ust", path); | |
127 | if (ret < 0) { | |
128 | PERROR("snprintf UST consumer trace path"); | |
129 | goto error; | |
130 | } | |
131 | ||
0177d773 | 132 | /* Set session path */ |
48842b30 | 133 | ret = snprintf(lus->pathname, PATH_MAX, "%s/ust", path); |
0177d773 | 134 | if (ret < 0) { |
44d3bd01 | 135 | PERROR("snprintf kernel traces path"); |
44844c29 | 136 | goto error_free_session; |
0177d773 DG |
137 | } |
138 | ||
44d3bd01 DG |
139 | DBG2("UST trace session create successful"); |
140 | ||
97ee3a89 DG |
141 | return lus; |
142 | ||
44844c29 | 143 | error_free_session: |
a2c0da86 MD |
144 | lttng_ht_destroy(lus->domain_global.channels); |
145 | lttng_ht_destroy(lus->domain_exec); | |
146 | lttng_ht_destroy(lus->domain_pid); | |
44844c29 | 147 | free(lus); |
97ee3a89 DG |
148 | error: |
149 | return NULL; | |
150 | } | |
151 | ||
152 | /* | |
153 | * Allocate and initialize a ust channel data structure. | |
154 | * | |
155 | * Return pointer to structure or NULL. | |
156 | */ | |
44d3bd01 DG |
157 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan, |
158 | char *path) | |
97ee3a89 DG |
159 | { |
160 | int ret; | |
161 | struct ltt_ust_channel *luc; | |
162 | ||
37357452 | 163 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 164 | if (luc == NULL) { |
df0f840b | 165 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
166 | goto error; |
167 | } | |
168 | ||
44d3bd01 | 169 | /* Copy UST channel attributes */ |
48842b30 DG |
170 | luc->attr.overwrite = chan->attr.overwrite; |
171 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
172 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
173 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
174 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 175 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
176 | |
177 | /* Translate to UST output enum */ | |
178 | switch (luc->attr.output) { | |
179 | default: | |
180 | luc->attr.output = LTTNG_UST_MMAP; | |
181 | break; | |
97ee3a89 | 182 | } |
97ee3a89 | 183 | |
97ee3a89 | 184 | /* Copy channel name */ |
0a1459bb | 185 | strncpy(luc->name, chan->name, sizeof(luc->name)); |
97ee3a89 DG |
186 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
187 | ||
f6a9efaa | 188 | /* Init node */ |
bec39940 | 189 | lttng_ht_node_init_str(&luc->node, luc->name); |
f6a9efaa | 190 | /* Alloc hash tables */ |
bec39940 DG |
191 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
192 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 193 | |
97ee3a89 | 194 | /* Set trace output path */ |
48842b30 | 195 | ret = snprintf(luc->pathname, PATH_MAX, "%s", path); |
97ee3a89 | 196 | if (ret < 0) { |
df0f840b | 197 | PERROR("asprintf ust create channel"); |
44844c29 | 198 | goto error_free_channel; |
97ee3a89 DG |
199 | } |
200 | ||
f6a9efaa DG |
201 | DBG2("Trace UST channel %s created", luc->name); |
202 | ||
97ee3a89 DG |
203 | return luc; |
204 | ||
44844c29 | 205 | error_free_channel: |
a2c0da86 MD |
206 | lttng_ht_destroy(luc->ctx); |
207 | lttng_ht_destroy(luc->events); | |
44844c29 | 208 | free(luc); |
97ee3a89 DG |
209 | error: |
210 | return NULL; | |
211 | } | |
212 | ||
213 | /* | |
214 | * Allocate and initialize a ust event. Set name and event type. | |
215 | * | |
216 | * Return pointer to structure or NULL. | |
217 | */ | |
218 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev) | |
219 | { | |
220 | struct ltt_ust_event *lue; | |
97ee3a89 | 221 | |
37357452 | 222 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 223 | if (lue == NULL) { |
ba7f0ae5 | 224 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
225 | goto error; |
226 | } | |
227 | ||
228 | switch (ev->type) { | |
229 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 230 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
231 | break; |
232 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 233 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
234 | break; |
235 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 236 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
237 | break; |
238 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 239 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
240 | break; |
241 | default: | |
242 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 243 | goto error_free_event; |
97ee3a89 DG |
244 | } |
245 | ||
246 | /* Copy event name */ | |
44d3bd01 DG |
247 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
248 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 249 | |
0cda4f28 | 250 | switch (ev->loglevel_type) { |
8005f29a MD |
251 | case LTTNG_EVENT_LOGLEVEL_ALL: |
252 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 253 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 254 | break; |
8005f29a MD |
255 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
256 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 257 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
258 | break; |
259 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
260 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 261 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
262 | break; |
263 | default: | |
4431494b | 264 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
265 | goto error_free_event; |
266 | } | |
267 | ||
0cda4f28 | 268 | |
f6a9efaa | 269 | /* Init node */ |
bec39940 | 270 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
f6a9efaa | 271 | /* Alloc context hash tables */ |
bec39940 | 272 | lue->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
af061a47 DG |
273 | if (lue->ctx == NULL) { |
274 | ERR("Unable to create context hash table for event %s", ev->name); | |
275 | goto error_free_event; | |
276 | } | |
97ee3a89 | 277 | |
300b8fd5 MD |
278 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
279 | lue->attr.name, lue->attr.loglevel_type, | |
280 | lue->attr.loglevel); | |
284d8f55 | 281 | |
97ee3a89 DG |
282 | return lue; |
283 | ||
44844c29 MD |
284 | error_free_event: |
285 | free(lue); | |
97ee3a89 DG |
286 | error: |
287 | return NULL; | |
288 | } | |
289 | ||
290 | /* | |
291 | * Allocate and initialize a ust metadata. | |
292 | * | |
293 | * Return pointer to structure or NULL. | |
294 | */ | |
295 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
296 | { | |
297 | int ret; | |
298 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 299 | |
3a009adb | 300 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 301 | if (lum == NULL) { |
df0f840b | 302 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
303 | goto error; |
304 | } | |
305 | ||
306 | /* Set default attributes */ | |
44d3bd01 DG |
307 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
308 | lum->attr.subbuf_size = DEFAULT_METADATA_SUBBUF_SIZE; | |
309 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; | |
310 | lum->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER; | |
311 | lum->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER; | |
d41f73b7 | 312 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 313 | |
97ee3a89 DG |
314 | lum->handle = -1; |
315 | /* Set metadata trace path */ | |
f6a9efaa | 316 | ret = snprintf(lum->pathname, PATH_MAX, "%s/metadata", path); |
97ee3a89 | 317 | if (ret < 0) { |
df0f840b | 318 | PERROR("asprintf ust metadata"); |
44844c29 | 319 | goto error_free_metadata; |
97ee3a89 DG |
320 | } |
321 | ||
322 | return lum; | |
323 | ||
44844c29 MD |
324 | error_free_metadata: |
325 | free(lum); | |
97ee3a89 DG |
326 | error: |
327 | return NULL; | |
328 | } | |
329 | ||
55cc08a6 DG |
330 | /* |
331 | * Allocate and initialize an UST context. | |
332 | * | |
333 | * Return pointer to structure or NULL. | |
334 | */ | |
335 | struct ltt_ust_context *trace_ust_create_context( | |
336 | struct lttng_event_context *ctx) | |
337 | { | |
338 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
339 | enum lttng_ust_context_type utype; |
340 | ||
341 | switch (ctx->ctx) { | |
342 | case LTTNG_EVENT_CONTEXT_VTID: | |
343 | utype = LTTNG_UST_CONTEXT_VTID; | |
344 | break; | |
345 | case LTTNG_EVENT_CONTEXT_VPID: | |
346 | utype = LTTNG_UST_CONTEXT_VPID; | |
347 | break; | |
348 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
349 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
350 | break; | |
351 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
352 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
353 | break; | |
354 | default: | |
355 | ERR("Invalid UST context"); | |
356 | return NULL; | |
357 | } | |
55cc08a6 DG |
358 | |
359 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
360 | if (uctx == NULL) { | |
361 | PERROR("zmalloc ltt_ust_context"); | |
362 | goto error; | |
363 | } | |
364 | ||
9197c5c4 | 365 | uctx->ctx.ctx = utype; |
bec39940 | 366 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
367 | |
368 | return uctx; | |
369 | ||
370 | error: | |
371 | return NULL; | |
372 | } | |
373 | ||
f6a9efaa DG |
374 | /* |
375 | * RCU safe free context structure. | |
376 | */ | |
377 | static void destroy_context_rcu(struct rcu_head *head) | |
378 | { | |
bec39940 DG |
379 | struct lttng_ht_node_ulong *node = |
380 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
381 | struct ltt_ust_context *ctx = |
382 | caa_container_of(node, struct ltt_ust_context, node); | |
383 | ||
384 | free(ctx); | |
385 | } | |
386 | ||
387 | /* | |
388 | * Cleanup UST context hash table. | |
389 | */ | |
7bd39047 | 390 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
391 | { |
392 | int ret; | |
bec39940 DG |
393 | struct lttng_ht_node_ulong *node; |
394 | struct lttng_ht_iter iter; | |
f6a9efaa | 395 | |
bec39940 DG |
396 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
397 | ret = lttng_ht_del(ht, &iter); | |
f6a9efaa DG |
398 | if (!ret) { |
399 | call_rcu(&node->head, destroy_context_rcu); | |
400 | } | |
f6a9efaa | 401 | } |
ed52805d | 402 | |
bec39940 | 403 | lttng_ht_destroy(ht); |
f6a9efaa DG |
404 | } |
405 | ||
97ee3a89 DG |
406 | /* |
407 | * Cleanup ust event structure. | |
408 | */ | |
409 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
410 | { | |
f6a9efaa | 411 | DBG2("Trace destroy UST event %s", event->attr.name); |
7bd39047 | 412 | destroy_contexts(event->ctx); |
53a80697 | 413 | free(event->filter); |
97ee3a89 DG |
414 | free(event); |
415 | } | |
416 | ||
f6a9efaa DG |
417 | /* |
418 | * URCU intermediate call to complete destroy event. | |
419 | */ | |
420 | static void destroy_event_rcu(struct rcu_head *head) | |
421 | { | |
bec39940 DG |
422 | struct lttng_ht_node_str *node = |
423 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
424 | struct ltt_ust_event *event = |
425 | caa_container_of(node, struct ltt_ust_event, node); | |
426 | ||
427 | trace_ust_destroy_event(event); | |
428 | } | |
429 | ||
284d8f55 DG |
430 | /* |
431 | * Cleanup UST events hashtable. | |
432 | */ | |
7bd39047 | 433 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
434 | { |
435 | int ret; | |
bec39940 DG |
436 | struct lttng_ht_node_str *node; |
437 | struct lttng_ht_iter iter; | |
ed52805d | 438 | |
bec39940 DG |
439 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
440 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
441 | assert(!ret); |
442 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d DG |
443 | } |
444 | ||
bec39940 | 445 | lttng_ht_destroy(events); |
ed52805d DG |
446 | } |
447 | ||
97ee3a89 DG |
448 | /* |
449 | * Cleanup ust channel structure. | |
450 | */ | |
451 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
452 | { | |
f6a9efaa | 453 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 454 | |
f6a9efaa DG |
455 | rcu_read_lock(); |
456 | ||
7bd39047 DG |
457 | /* Destroying all events of the channel */ |
458 | destroy_events(channel->events); | |
459 | /* Destroying all context of the channel */ | |
460 | destroy_contexts(channel->ctx); | |
97ee3a89 | 461 | |
97ee3a89 | 462 | free(channel); |
f6a9efaa DG |
463 | |
464 | rcu_read_unlock(); | |
465 | } | |
466 | ||
467 | /* | |
468 | * URCU intermediate call to complete destroy channel. | |
469 | */ | |
470 | static void destroy_channel_rcu(struct rcu_head *head) | |
471 | { | |
bec39940 DG |
472 | struct lttng_ht_node_str *node = |
473 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
474 | struct ltt_ust_channel *channel = |
475 | caa_container_of(node, struct ltt_ust_channel, node); | |
476 | ||
477 | trace_ust_destroy_channel(channel); | |
97ee3a89 DG |
478 | } |
479 | ||
480 | /* | |
481 | * Cleanup ust metadata structure. | |
482 | */ | |
483 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
484 | { | |
abc9138a MD |
485 | if (!metadata->handle) { |
486 | return; | |
487 | } | |
f6a9efaa | 488 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
489 | free(metadata); |
490 | } | |
491 | ||
492 | /* | |
f6a9efaa | 493 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 494 | */ |
bec39940 | 495 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
496 | { |
497 | int ret; | |
bec39940 DG |
498 | struct lttng_ht_node_str *node; |
499 | struct lttng_ht_iter iter; | |
f6a9efaa | 500 | |
24d1723f DG |
501 | rcu_read_lock(); |
502 | ||
bec39940 DG |
503 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
504 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
505 | assert(!ret); |
506 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 507 | } |
ed52805d | 508 | |
bec39940 | 509 | lttng_ht_destroy(channels); |
24d1723f DG |
510 | |
511 | rcu_read_unlock(); | |
f6a9efaa DG |
512 | } |
513 | ||
514 | /* | |
515 | * Cleanup UST pid domain. | |
516 | */ | |
bec39940 | 517 | static void destroy_domain_pid(struct lttng_ht *ht) |
f6a9efaa DG |
518 | { |
519 | int ret; | |
bec39940 | 520 | struct lttng_ht_iter iter; |
ed52805d | 521 | struct ltt_ust_domain_pid *dpid; |
f6a9efaa | 522 | |
bec39940 DG |
523 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dpid, node.node) { |
524 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
525 | assert(!ret); |
526 | destroy_channels(dpid->channels); | |
f6a9efaa | 527 | } |
ed52805d | 528 | |
bec39940 | 529 | lttng_ht_destroy(ht); |
f6a9efaa DG |
530 | } |
531 | ||
532 | /* | |
533 | * Cleanup UST exec name domain. | |
534 | */ | |
bec39940 | 535 | static void destroy_domain_exec(struct lttng_ht *ht) |
97ee3a89 | 536 | { |
f6a9efaa | 537 | int ret; |
bec39940 | 538 | struct lttng_ht_iter iter; |
ed52805d | 539 | struct ltt_ust_domain_exec *dexec; |
f6a9efaa | 540 | |
bec39940 DG |
541 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dexec, node.node) { |
542 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
543 | assert(!ret); |
544 | destroy_channels(dexec->channels); | |
f6a9efaa | 545 | } |
ed52805d | 546 | |
bec39940 | 547 | lttng_ht_destroy(ht); |
f6a9efaa | 548 | } |
97ee3a89 | 549 | |
f6a9efaa DG |
550 | /* |
551 | * Cleanup UST global domain. | |
552 | */ | |
553 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
554 | { | |
555 | destroy_channels(dom->channels); | |
556 | } | |
97ee3a89 | 557 | |
f6a9efaa DG |
558 | /* |
559 | * Cleanup ust session structure | |
560 | */ | |
561 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
562 | { | |
ed52805d | 563 | /* Extra protection */ |
97ee3a89 DG |
564 | if (session == NULL) { |
565 | return; | |
566 | } | |
567 | ||
f6a9efaa DG |
568 | rcu_read_lock(); |
569 | ||
fc4705fe | 570 | DBG2("Trace UST destroy session %u", session->id); |
f6a9efaa | 571 | |
f6a9efaa DG |
572 | /* Cleaning up UST domain */ |
573 | destroy_domain_global(&session->domain_global); | |
574 | destroy_domain_pid(session->domain_pid); | |
575 | destroy_domain_exec(session->domain_exec); | |
44d3bd01 | 576 | |
97ee3a89 | 577 | free(session); |
f6a9efaa DG |
578 | |
579 | rcu_read_unlock(); | |
97ee3a89 | 580 | } |