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 DG |
183 | struct ltt_ust_session *trace_ust_create_session(char *path, |
184 | unsigned int session_id, struct lttng_domain *domain) | |
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 | ||
37357452 | 265 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 266 | if (luc == NULL) { |
df0f840b | 267 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
268 | goto error; |
269 | } | |
270 | ||
44d3bd01 | 271 | /* Copy UST channel attributes */ |
48842b30 DG |
272 | luc->attr.overwrite = chan->attr.overwrite; |
273 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
274 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
275 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
276 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 277 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
278 | |
279 | /* Translate to UST output enum */ | |
280 | switch (luc->attr.output) { | |
281 | default: | |
282 | luc->attr.output = LTTNG_UST_MMAP; | |
283 | break; | |
97ee3a89 | 284 | } |
97ee3a89 | 285 | |
97ee3a89 | 286 | /* Copy channel name */ |
0a1459bb | 287 | strncpy(luc->name, chan->name, sizeof(luc->name)); |
97ee3a89 DG |
288 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
289 | ||
f6a9efaa | 290 | /* Init node */ |
bec39940 | 291 | lttng_ht_node_init_str(&luc->node, luc->name); |
f6a9efaa | 292 | /* Alloc hash tables */ |
bec39940 DG |
293 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
294 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 295 | |
97ee3a89 | 296 | /* Set trace output path */ |
48842b30 | 297 | ret = snprintf(luc->pathname, PATH_MAX, "%s", path); |
97ee3a89 | 298 | if (ret < 0) { |
df0f840b | 299 | PERROR("asprintf ust create channel"); |
44844c29 | 300 | goto error_free_channel; |
97ee3a89 DG |
301 | } |
302 | ||
f6a9efaa DG |
303 | DBG2("Trace UST channel %s created", luc->name); |
304 | ||
97ee3a89 DG |
305 | return luc; |
306 | ||
44844c29 | 307 | error_free_channel: |
a2c0da86 MD |
308 | lttng_ht_destroy(luc->ctx); |
309 | lttng_ht_destroy(luc->events); | |
44844c29 | 310 | free(luc); |
97ee3a89 DG |
311 | error: |
312 | return NULL; | |
313 | } | |
314 | ||
315 | /* | |
316 | * Allocate and initialize a ust event. Set name and event type. | |
317 | * | |
318 | * Return pointer to structure or NULL. | |
319 | */ | |
025faf73 DG |
320 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
321 | struct lttng_filter_bytecode *filter) | |
97ee3a89 DG |
322 | { |
323 | struct ltt_ust_event *lue; | |
97ee3a89 | 324 | |
37357452 | 325 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 326 | if (lue == NULL) { |
ba7f0ae5 | 327 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
328 | goto error; |
329 | } | |
330 | ||
331 | switch (ev->type) { | |
332 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 333 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
334 | break; |
335 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 336 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
337 | break; |
338 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 339 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
340 | break; |
341 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 342 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
343 | break; |
344 | default: | |
345 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 346 | goto error_free_event; |
97ee3a89 DG |
347 | } |
348 | ||
349 | /* Copy event name */ | |
44d3bd01 DG |
350 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
351 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 352 | |
0cda4f28 | 353 | switch (ev->loglevel_type) { |
8005f29a MD |
354 | case LTTNG_EVENT_LOGLEVEL_ALL: |
355 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 356 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 357 | break; |
8005f29a MD |
358 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
359 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 360 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
361 | break; |
362 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
363 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 364 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
365 | break; |
366 | default: | |
4431494b | 367 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
368 | goto error_free_event; |
369 | } | |
370 | ||
025faf73 DG |
371 | /* Same layout. */ |
372 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; | |
0cda4f28 | 373 | |
f6a9efaa | 374 | /* Init node */ |
bec39940 | 375 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 376 | |
300b8fd5 MD |
377 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
378 | lue->attr.name, lue->attr.loglevel_type, | |
379 | lue->attr.loglevel); | |
284d8f55 | 380 | |
97ee3a89 DG |
381 | return lue; |
382 | ||
44844c29 MD |
383 | error_free_event: |
384 | free(lue); | |
97ee3a89 DG |
385 | error: |
386 | return NULL; | |
387 | } | |
388 | ||
389 | /* | |
390 | * Allocate and initialize a ust metadata. | |
391 | * | |
392 | * Return pointer to structure or NULL. | |
393 | */ | |
394 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
395 | { | |
396 | int ret; | |
397 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 398 | |
3a009adb | 399 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 400 | if (lum == NULL) { |
df0f840b | 401 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
402 | goto error; |
403 | } | |
404 | ||
405 | /* Set default attributes */ | |
44d3bd01 | 406 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 407 | lum->attr.subbuf_size = default_get_metadata_subbuf_size(); |
44d3bd01 DG |
408 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
409 | lum->attr.switch_timer_interval = DEFAULT_CHANNEL_SWITCH_TIMER; | |
410 | lum->attr.read_timer_interval = DEFAULT_CHANNEL_READ_TIMER; | |
d41f73b7 | 411 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 412 | |
97ee3a89 DG |
413 | lum->handle = -1; |
414 | /* Set metadata trace path */ | |
f6a9efaa | 415 | ret = snprintf(lum->pathname, PATH_MAX, "%s/metadata", path); |
97ee3a89 | 416 | if (ret < 0) { |
df0f840b | 417 | PERROR("asprintf ust metadata"); |
44844c29 | 418 | goto error_free_metadata; |
97ee3a89 DG |
419 | } |
420 | ||
421 | return lum; | |
422 | ||
44844c29 MD |
423 | error_free_metadata: |
424 | free(lum); | |
97ee3a89 DG |
425 | error: |
426 | return NULL; | |
427 | } | |
428 | ||
55cc08a6 DG |
429 | /* |
430 | * Allocate and initialize an UST context. | |
431 | * | |
432 | * Return pointer to structure or NULL. | |
433 | */ | |
434 | struct ltt_ust_context *trace_ust_create_context( | |
435 | struct lttng_event_context *ctx) | |
436 | { | |
437 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
438 | enum lttng_ust_context_type utype; |
439 | ||
440 | switch (ctx->ctx) { | |
441 | case LTTNG_EVENT_CONTEXT_VTID: | |
442 | utype = LTTNG_UST_CONTEXT_VTID; | |
443 | break; | |
444 | case LTTNG_EVENT_CONTEXT_VPID: | |
445 | utype = LTTNG_UST_CONTEXT_VPID; | |
446 | break; | |
447 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
448 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
449 | break; | |
450 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
451 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
452 | break; | |
453 | default: | |
454 | ERR("Invalid UST context"); | |
455 | return NULL; | |
456 | } | |
55cc08a6 DG |
457 | |
458 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
459 | if (uctx == NULL) { | |
460 | PERROR("zmalloc ltt_ust_context"); | |
461 | goto error; | |
462 | } | |
463 | ||
9197c5c4 | 464 | uctx->ctx.ctx = utype; |
bec39940 | 465 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
466 | |
467 | return uctx; | |
468 | ||
469 | error: | |
470 | return NULL; | |
471 | } | |
472 | ||
f6a9efaa DG |
473 | /* |
474 | * RCU safe free context structure. | |
475 | */ | |
476 | static void destroy_context_rcu(struct rcu_head *head) | |
477 | { | |
bec39940 DG |
478 | struct lttng_ht_node_ulong *node = |
479 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
480 | struct ltt_ust_context *ctx = |
481 | caa_container_of(node, struct ltt_ust_context, node); | |
482 | ||
483 | free(ctx); | |
484 | } | |
485 | ||
486 | /* | |
487 | * Cleanup UST context hash table. | |
488 | */ | |
7bd39047 | 489 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
490 | { |
491 | int ret; | |
bec39940 DG |
492 | struct lttng_ht_node_ulong *node; |
493 | struct lttng_ht_iter iter; | |
f6a9efaa | 494 | |
bec39940 DG |
495 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
496 | ret = lttng_ht_del(ht, &iter); | |
f6a9efaa DG |
497 | if (!ret) { |
498 | call_rcu(&node->head, destroy_context_rcu); | |
499 | } | |
f6a9efaa | 500 | } |
ed52805d | 501 | |
bec39940 | 502 | lttng_ht_destroy(ht); |
f6a9efaa DG |
503 | } |
504 | ||
97ee3a89 DG |
505 | /* |
506 | * Cleanup ust event structure. | |
507 | */ | |
508 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
509 | { | |
f6a9efaa | 510 | DBG2("Trace destroy UST event %s", event->attr.name); |
53a80697 | 511 | free(event->filter); |
97ee3a89 DG |
512 | free(event); |
513 | } | |
514 | ||
f6a9efaa DG |
515 | /* |
516 | * URCU intermediate call to complete destroy event. | |
517 | */ | |
518 | static void destroy_event_rcu(struct rcu_head *head) | |
519 | { | |
bec39940 DG |
520 | struct lttng_ht_node_str *node = |
521 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
522 | struct ltt_ust_event *event = |
523 | caa_container_of(node, struct ltt_ust_event, node); | |
524 | ||
525 | trace_ust_destroy_event(event); | |
526 | } | |
527 | ||
284d8f55 DG |
528 | /* |
529 | * Cleanup UST events hashtable. | |
530 | */ | |
7bd39047 | 531 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
532 | { |
533 | int ret; | |
bec39940 DG |
534 | struct lttng_ht_node_str *node; |
535 | struct lttng_ht_iter iter; | |
ed52805d | 536 | |
bec39940 DG |
537 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
538 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
539 | assert(!ret); |
540 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d DG |
541 | } |
542 | ||
bec39940 | 543 | lttng_ht_destroy(events); |
ed52805d DG |
544 | } |
545 | ||
97ee3a89 DG |
546 | /* |
547 | * Cleanup ust channel structure. | |
548 | */ | |
549 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
550 | { | |
f6a9efaa | 551 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 552 | |
f6a9efaa DG |
553 | rcu_read_lock(); |
554 | ||
7bd39047 DG |
555 | /* Destroying all events of the channel */ |
556 | destroy_events(channel->events); | |
557 | /* Destroying all context of the channel */ | |
558 | destroy_contexts(channel->ctx); | |
97ee3a89 | 559 | |
97ee3a89 | 560 | free(channel); |
f6a9efaa DG |
561 | |
562 | rcu_read_unlock(); | |
563 | } | |
564 | ||
565 | /* | |
566 | * URCU intermediate call to complete destroy channel. | |
567 | */ | |
568 | static void destroy_channel_rcu(struct rcu_head *head) | |
569 | { | |
bec39940 DG |
570 | struct lttng_ht_node_str *node = |
571 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
572 | struct ltt_ust_channel *channel = |
573 | caa_container_of(node, struct ltt_ust_channel, node); | |
574 | ||
575 | trace_ust_destroy_channel(channel); | |
97ee3a89 DG |
576 | } |
577 | ||
578 | /* | |
579 | * Cleanup ust metadata structure. | |
580 | */ | |
581 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
582 | { | |
abc9138a MD |
583 | if (!metadata->handle) { |
584 | return; | |
585 | } | |
f6a9efaa | 586 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
587 | free(metadata); |
588 | } | |
589 | ||
590 | /* | |
f6a9efaa | 591 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 592 | */ |
bec39940 | 593 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
594 | { |
595 | int ret; | |
bec39940 DG |
596 | struct lttng_ht_node_str *node; |
597 | struct lttng_ht_iter iter; | |
f6a9efaa | 598 | |
24d1723f DG |
599 | rcu_read_lock(); |
600 | ||
bec39940 DG |
601 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
602 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
603 | assert(!ret); |
604 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 605 | } |
ed52805d | 606 | |
bec39940 | 607 | lttng_ht_destroy(channels); |
24d1723f DG |
608 | |
609 | rcu_read_unlock(); | |
f6a9efaa DG |
610 | } |
611 | ||
612 | /* | |
613 | * Cleanup UST pid domain. | |
614 | */ | |
bec39940 | 615 | static void destroy_domain_pid(struct lttng_ht *ht) |
f6a9efaa DG |
616 | { |
617 | int ret; | |
bec39940 | 618 | struct lttng_ht_iter iter; |
ed52805d | 619 | struct ltt_ust_domain_pid *dpid; |
f6a9efaa | 620 | |
bec39940 DG |
621 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dpid, node.node) { |
622 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
623 | assert(!ret); |
624 | destroy_channels(dpid->channels); | |
f6a9efaa | 625 | } |
ed52805d | 626 | |
bec39940 | 627 | lttng_ht_destroy(ht); |
f6a9efaa DG |
628 | } |
629 | ||
630 | /* | |
631 | * Cleanup UST exec name domain. | |
632 | */ | |
bec39940 | 633 | static void destroy_domain_exec(struct lttng_ht *ht) |
97ee3a89 | 634 | { |
f6a9efaa | 635 | int ret; |
bec39940 | 636 | struct lttng_ht_iter iter; |
ed52805d | 637 | struct ltt_ust_domain_exec *dexec; |
f6a9efaa | 638 | |
bec39940 DG |
639 | cds_lfht_for_each_entry(ht->ht, &iter.iter, dexec, node.node) { |
640 | ret = lttng_ht_del(ht , &iter); | |
7bd39047 DG |
641 | assert(!ret); |
642 | destroy_channels(dexec->channels); | |
f6a9efaa | 643 | } |
ed52805d | 644 | |
bec39940 | 645 | lttng_ht_destroy(ht); |
f6a9efaa | 646 | } |
97ee3a89 | 647 | |
f6a9efaa DG |
648 | /* |
649 | * Cleanup UST global domain. | |
650 | */ | |
651 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
652 | { | |
653 | destroy_channels(dom->channels); | |
654 | } | |
97ee3a89 | 655 | |
f6a9efaa DG |
656 | /* |
657 | * Cleanup ust session structure | |
658 | */ | |
659 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
660 | { | |
ed52805d | 661 | /* Extra protection */ |
97ee3a89 DG |
662 | if (session == NULL) { |
663 | return; | |
664 | } | |
665 | ||
f6a9efaa DG |
666 | rcu_read_lock(); |
667 | ||
fc4705fe | 668 | DBG2("Trace UST destroy session %u", session->id); |
f6a9efaa | 669 | |
f6a9efaa DG |
670 | /* Cleaning up UST domain */ |
671 | destroy_domain_global(&session->domain_global); | |
672 | destroy_domain_pid(session->domain_pid); | |
673 | destroy_domain_exec(session->domain_exec); | |
44d3bd01 | 674 | |
3f8e211f DG |
675 | consumer_destroy_output(session->consumer); |
676 | consumer_destroy_output(session->tmp_consumer); | |
677 | ||
97ee3a89 | 678 | free(session); |
f6a9efaa DG |
679 | |
680 | rcu_read_unlock(); | |
97ee3a89 | 681 | } |