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) { | |
09a90bcd | 114 | goto error_consumer; |
00e2e675 DG |
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. */ | |
a4b92340 DG |
126 | if (path && strlen(path) > 0) { |
127 | ret = snprintf(lus->consumer->dst.trace_path, PATH_MAX, | |
128 | "%s" DEFAULT_UST_TRACE_DIR, path); | |
129 | if (ret < 0) { | |
130 | PERROR("snprintf UST consumer trace path"); | |
09a90bcd | 131 | goto error_path; |
a4b92340 DG |
132 | } |
133 | ||
134 | /* Set session path */ | |
135 | ret = snprintf(lus->pathname, PATH_MAX, "%s" DEFAULT_UST_TRACE_DIR, | |
136 | path); | |
137 | if (ret < 0) { | |
138 | PERROR("snprintf kernel traces path"); | |
09a90bcd | 139 | goto error_path; |
a4b92340 | 140 | } |
0177d773 DG |
141 | } |
142 | ||
44d3bd01 DG |
143 | DBG2("UST trace session create successful"); |
144 | ||
97ee3a89 DG |
145 | return lus; |
146 | ||
09a90bcd DG |
147 | error_path: |
148 | consumer_destroy_output(lus->consumer); | |
149 | error_consumer: | |
a2c0da86 MD |
150 | lttng_ht_destroy(lus->domain_global.channels); |
151 | lttng_ht_destroy(lus->domain_exec); | |
152 | lttng_ht_destroy(lus->domain_pid); | |
44844c29 | 153 | free(lus); |
97ee3a89 DG |
154 | error: |
155 | return NULL; | |
156 | } | |
157 | ||
158 | /* | |
159 | * Allocate and initialize a ust channel data structure. | |
160 | * | |
161 | * Return pointer to structure or NULL. | |
162 | */ | |
44d3bd01 DG |
163 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan, |
164 | char *path) | |
97ee3a89 DG |
165 | { |
166 | int ret; | |
167 | struct ltt_ust_channel *luc; | |
168 | ||
37357452 | 169 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 170 | if (luc == NULL) { |
df0f840b | 171 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
172 | goto error; |
173 | } | |
174 | ||
44d3bd01 | 175 | /* Copy UST channel attributes */ |
48842b30 DG |
176 | luc->attr.overwrite = chan->attr.overwrite; |
177 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
178 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
179 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
180 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 181 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
182 | |
183 | /* Translate to UST output enum */ | |
184 | switch (luc->attr.output) { | |
185 | default: | |
186 | luc->attr.output = LTTNG_UST_MMAP; | |
187 | break; | |
97ee3a89 | 188 | } |
97ee3a89 | 189 | |
97ee3a89 | 190 | /* Copy channel name */ |
0a1459bb | 191 | strncpy(luc->name, chan->name, sizeof(luc->name)); |
97ee3a89 DG |
192 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
193 | ||
f6a9efaa | 194 | /* Init node */ |
bec39940 | 195 | lttng_ht_node_init_str(&luc->node, luc->name); |
f6a9efaa | 196 | /* Alloc hash tables */ |
bec39940 DG |
197 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
198 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 199 | |
97ee3a89 | 200 | /* Set trace output path */ |
48842b30 | 201 | ret = snprintf(luc->pathname, PATH_MAX, "%s", path); |
97ee3a89 | 202 | if (ret < 0) { |
df0f840b | 203 | PERROR("asprintf ust create channel"); |
44844c29 | 204 | goto error_free_channel; |
97ee3a89 DG |
205 | } |
206 | ||
f6a9efaa DG |
207 | DBG2("Trace UST channel %s created", luc->name); |
208 | ||
97ee3a89 DG |
209 | return luc; |
210 | ||
44844c29 | 211 | error_free_channel: |
a2c0da86 MD |
212 | lttng_ht_destroy(luc->ctx); |
213 | lttng_ht_destroy(luc->events); | |
44844c29 | 214 | free(luc); |
97ee3a89 DG |
215 | error: |
216 | return NULL; | |
217 | } | |
218 | ||
219 | /* | |
220 | * Allocate and initialize a ust event. Set name and event type. | |
221 | * | |
222 | * Return pointer to structure or NULL. | |
223 | */ | |
224 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev) | |
225 | { | |
226 | struct ltt_ust_event *lue; | |
97ee3a89 | 227 | |
37357452 | 228 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 229 | if (lue == NULL) { |
ba7f0ae5 | 230 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
231 | goto error; |
232 | } | |
233 | ||
234 | switch (ev->type) { | |
235 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 236 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
237 | break; |
238 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 239 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
240 | break; |
241 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 242 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
243 | break; |
244 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 245 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
246 | break; |
247 | default: | |
248 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 249 | goto error_free_event; |
97ee3a89 DG |
250 | } |
251 | ||
252 | /* Copy event name */ | |
44d3bd01 DG |
253 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
254 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 255 | |
0cda4f28 | 256 | switch (ev->loglevel_type) { |
8005f29a MD |
257 | case LTTNG_EVENT_LOGLEVEL_ALL: |
258 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 259 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 260 | break; |
8005f29a MD |
261 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
262 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 263 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
264 | break; |
265 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
266 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 267 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
268 | break; |
269 | default: | |
4431494b | 270 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
271 | goto error_free_event; |
272 | } | |
273 | ||
0cda4f28 | 274 | |
f6a9efaa | 275 | /* Init node */ |
bec39940 | 276 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
f6a9efaa | 277 | /* Alloc context hash tables */ |
bec39940 | 278 | lue->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
af061a47 DG |
279 | if (lue->ctx == NULL) { |
280 | ERR("Unable to create context hash table for event %s", ev->name); | |
281 | goto error_free_event; | |
282 | } | |
97ee3a89 | 283 | |
300b8fd5 MD |
284 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
285 | lue->attr.name, lue->attr.loglevel_type, | |
286 | lue->attr.loglevel); | |
284d8f55 | 287 | |
97ee3a89 DG |
288 | return lue; |
289 | ||
44844c29 MD |
290 | error_free_event: |
291 | free(lue); | |
97ee3a89 DG |
292 | error: |
293 | return NULL; | |
294 | } | |
295 | ||
296 | /* | |
297 | * Allocate and initialize a ust metadata. | |
298 | * | |
299 | * Return pointer to structure or NULL. | |
300 | */ | |
301 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
302 | { | |
303 | int ret; | |
304 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 305 | |
3a009adb | 306 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 307 | if (lum == NULL) { |
df0f840b | 308 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
309 | goto error; |
310 | } | |
311 | ||
312 | /* Set default attributes */ | |
44d3bd01 | 313 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 314 | lum->attr.subbuf_size = default_get_metadata_subbuf_size(); |
44d3bd01 DG |
315 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
316 | lum->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER; | |
317 | lum->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER; | |
d41f73b7 | 318 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 319 | |
97ee3a89 DG |
320 | lum->handle = -1; |
321 | /* Set metadata trace path */ | |
f6a9efaa | 322 | ret = snprintf(lum->pathname, PATH_MAX, "%s/metadata", path); |
97ee3a89 | 323 | if (ret < 0) { |
df0f840b | 324 | PERROR("asprintf ust metadata"); |
44844c29 | 325 | goto error_free_metadata; |
97ee3a89 DG |
326 | } |
327 | ||
328 | return lum; | |
329 | ||
44844c29 MD |
330 | error_free_metadata: |
331 | free(lum); | |
97ee3a89 DG |
332 | error: |
333 | return NULL; | |
334 | } | |
335 | ||
55cc08a6 DG |
336 | /* |
337 | * Allocate and initialize an UST context. | |
338 | * | |
339 | * Return pointer to structure or NULL. | |
340 | */ | |
341 | struct ltt_ust_context *trace_ust_create_context( | |
342 | struct lttng_event_context *ctx) | |
343 | { | |
344 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
345 | enum lttng_ust_context_type utype; |
346 | ||
347 | switch (ctx->ctx) { | |
348 | case LTTNG_EVENT_CONTEXT_VTID: | |
349 | utype = LTTNG_UST_CONTEXT_VTID; | |
350 | break; | |
351 | case LTTNG_EVENT_CONTEXT_VPID: | |
352 | utype = LTTNG_UST_CONTEXT_VPID; | |
353 | break; | |
354 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
355 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
356 | break; | |
357 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
358 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
359 | break; | |
360 | default: | |
361 | ERR("Invalid UST context"); | |
362 | return NULL; | |
363 | } | |
55cc08a6 DG |
364 | |
365 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
366 | if (uctx == NULL) { | |
367 | PERROR("zmalloc ltt_ust_context"); | |
368 | goto error; | |
369 | } | |
370 | ||
9197c5c4 | 371 | uctx->ctx.ctx = utype; |
bec39940 | 372 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
373 | |
374 | return uctx; | |
375 | ||
376 | error: | |
377 | return NULL; | |
378 | } | |
379 | ||
f6a9efaa DG |
380 | /* |
381 | * RCU safe free context structure. | |
382 | */ | |
383 | static void destroy_context_rcu(struct rcu_head *head) | |
384 | { | |
bec39940 DG |
385 | struct lttng_ht_node_ulong *node = |
386 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
387 | struct ltt_ust_context *ctx = |
388 | caa_container_of(node, struct ltt_ust_context, node); | |
389 | ||
390 | free(ctx); | |
391 | } | |
392 | ||
393 | /* | |
394 | * Cleanup UST context hash table. | |
395 | */ | |
7bd39047 | 396 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
397 | { |
398 | int ret; | |
bec39940 DG |
399 | struct lttng_ht_node_ulong *node; |
400 | struct lttng_ht_iter iter; | |
f6a9efaa | 401 | |
bec39940 DG |
402 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
403 | ret = lttng_ht_del(ht, &iter); | |
f6a9efaa DG |
404 | if (!ret) { |
405 | call_rcu(&node->head, destroy_context_rcu); | |
406 | } | |
f6a9efaa | 407 | } |
ed52805d | 408 | |
bec39940 | 409 | lttng_ht_destroy(ht); |
f6a9efaa DG |
410 | } |
411 | ||
97ee3a89 DG |
412 | /* |
413 | * Cleanup ust event structure. | |
414 | */ | |
415 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
416 | { | |
f6a9efaa | 417 | DBG2("Trace destroy UST event %s", event->attr.name); |
7bd39047 | 418 | destroy_contexts(event->ctx); |
53a80697 | 419 | free(event->filter); |
97ee3a89 DG |
420 | free(event); |
421 | } | |
422 | ||
f6a9efaa DG |
423 | /* |
424 | * URCU intermediate call to complete destroy event. | |
425 | */ | |
426 | static void destroy_event_rcu(struct rcu_head *head) | |
427 | { | |
bec39940 DG |
428 | struct lttng_ht_node_str *node = |
429 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
430 | struct ltt_ust_event *event = |
431 | caa_container_of(node, struct ltt_ust_event, node); | |
432 | ||
433 | trace_ust_destroy_event(event); | |
434 | } | |
435 | ||
284d8f55 DG |
436 | /* |
437 | * Cleanup UST events hashtable. | |
438 | */ | |
7bd39047 | 439 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
440 | { |
441 | int ret; | |
bec39940 DG |
442 | struct lttng_ht_node_str *node; |
443 | struct lttng_ht_iter iter; | |
ed52805d | 444 | |
bec39940 DG |
445 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
446 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
447 | assert(!ret); |
448 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d DG |
449 | } |
450 | ||
bec39940 | 451 | lttng_ht_destroy(events); |
ed52805d DG |
452 | } |
453 | ||
97ee3a89 DG |
454 | /* |
455 | * Cleanup ust channel structure. | |
456 | */ | |
457 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
458 | { | |
f6a9efaa | 459 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 460 | |
f6a9efaa DG |
461 | rcu_read_lock(); |
462 | ||
7bd39047 DG |
463 | /* Destroying all events of the channel */ |
464 | destroy_events(channel->events); | |
465 | /* Destroying all context of the channel */ | |
466 | destroy_contexts(channel->ctx); | |
97ee3a89 | 467 | |
97ee3a89 | 468 | free(channel); |
f6a9efaa DG |
469 | |
470 | rcu_read_unlock(); | |
471 | } | |
472 | ||
473 | /* | |
474 | * URCU intermediate call to complete destroy channel. | |
475 | */ | |
476 | static void destroy_channel_rcu(struct rcu_head *head) | |
477 | { | |
bec39940 DG |
478 | struct lttng_ht_node_str *node = |
479 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
480 | struct ltt_ust_channel *channel = |
481 | caa_container_of(node, struct ltt_ust_channel, node); | |
482 | ||
483 | trace_ust_destroy_channel(channel); | |
97ee3a89 DG |
484 | } |
485 | ||
486 | /* | |
487 | * Cleanup ust metadata structure. | |
488 | */ | |
489 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
490 | { | |
abc9138a MD |
491 | if (!metadata->handle) { |
492 | return; | |
493 | } | |
f6a9efaa | 494 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
495 | free(metadata); |
496 | } | |
497 | ||
498 | /* | |
f6a9efaa | 499 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 500 | */ |
bec39940 | 501 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
502 | { |
503 | int ret; | |
bec39940 DG |
504 | struct lttng_ht_node_str *node; |
505 | struct lttng_ht_iter iter; | |
f6a9efaa | 506 | |
24d1723f DG |
507 | rcu_read_lock(); |
508 | ||
bec39940 DG |
509 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
510 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
511 | assert(!ret); |
512 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 513 | } |
ed52805d | 514 | |
bec39940 | 515 | lttng_ht_destroy(channels); |
24d1723f DG |
516 | |
517 | rcu_read_unlock(); | |
f6a9efaa DG |
518 | } |
519 | ||
520 | /* | |
521 | * Cleanup UST pid domain. | |
522 | */ | |
bec39940 | 523 | static void destroy_domain_pid(struct lttng_ht *ht) |
f6a9efaa DG |
524 | { |
525 | int ret; | |
bec39940 | 526 | struct lttng_ht_iter iter; |
ed52805d | 527 | struct ltt_ust_domain_pid *dpid; |
f6a9efaa | 528 | |
bec39940 DG |
529 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dpid, node.node) { |
530 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
531 | assert(!ret); |
532 | destroy_channels(dpid->channels); | |
f6a9efaa | 533 | } |
ed52805d | 534 | |
bec39940 | 535 | lttng_ht_destroy(ht); |
f6a9efaa DG |
536 | } |
537 | ||
538 | /* | |
539 | * Cleanup UST exec name domain. | |
540 | */ | |
bec39940 | 541 | static void destroy_domain_exec(struct lttng_ht *ht) |
97ee3a89 | 542 | { |
f6a9efaa | 543 | int ret; |
bec39940 | 544 | struct lttng_ht_iter iter; |
ed52805d | 545 | struct ltt_ust_domain_exec *dexec; |
f6a9efaa | 546 | |
bec39940 DG |
547 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dexec, node.node) { |
548 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
549 | assert(!ret); |
550 | destroy_channels(dexec->channels); | |
f6a9efaa | 551 | } |
ed52805d | 552 | |
bec39940 | 553 | lttng_ht_destroy(ht); |
f6a9efaa | 554 | } |
97ee3a89 | 555 | |
f6a9efaa DG |
556 | /* |
557 | * Cleanup UST global domain. | |
558 | */ | |
559 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
560 | { | |
561 | destroy_channels(dom->channels); | |
562 | } | |
97ee3a89 | 563 | |
f6a9efaa DG |
564 | /* |
565 | * Cleanup ust session structure | |
566 | */ | |
567 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
568 | { | |
ed52805d | 569 | /* Extra protection */ |
97ee3a89 DG |
570 | if (session == NULL) { |
571 | return; | |
572 | } | |
573 | ||
f6a9efaa DG |
574 | rcu_read_lock(); |
575 | ||
fc4705fe | 576 | DBG2("Trace UST destroy session %u", session->id); |
f6a9efaa | 577 | |
f6a9efaa DG |
578 | /* Cleaning up UST domain */ |
579 | destroy_domain_global(&session->domain_global); | |
580 | destroy_domain_pid(session->domain_pid); | |
581 | destroy_domain_exec(session->domain_exec); | |
44d3bd01 | 582 | |
3f8e211f DG |
583 | consumer_destroy_output(session->consumer); |
584 | consumer_destroy_output(session->tmp_consumer); | |
585 | ||
97ee3a89 | 586 | free(session); |
f6a9efaa DG |
587 | |
588 | rcu_read_unlock(); | |
97ee3a89 | 589 | } |