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> | |
d9bf3ca4 | 23 | #include <inttypes.h> |
97ee3a89 | 24 | |
990570ed DG |
25 | #include <common/common.h> |
26 | #include <common/defaults.h> | |
97ee3a89 | 27 | |
7972aab2 | 28 | #include "buffer-registry.h" |
97ee3a89 | 29 | #include "trace-ust.h" |
0b2dc8df | 30 | #include "utils.h" |
97ee3a89 | 31 | |
025faf73 DG |
32 | /* |
33 | * Match function for the events hash table lookup. | |
34 | * | |
35 | * Matches by name only. Used by the disable command. | |
36 | */ | |
18eace3b DG |
37 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
38 | const void *_key) | |
39 | { | |
40 | struct ltt_ust_event *event; | |
41 | const char *name; | |
42 | ||
43 | assert(node); | |
44 | assert(_key); | |
45 | ||
46 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
47 | name = _key; | |
48 | ||
49 | /* Event name */ | |
50 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
51 | goto no_match; | |
52 | } | |
53 | ||
025faf73 | 54 | /* Match */ |
18eace3b DG |
55 | return 1; |
56 | ||
57 | no_match: | |
58 | return 0; | |
59 | } | |
60 | ||
025faf73 DG |
61 | /* |
62 | * Match function for the hash table lookup. | |
63 | * | |
64 | * It matches an ust event based on three attributes which are the event name, | |
65 | * the filter bytecode and the loglevel. | |
66 | */ | |
18eace3b DG |
67 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
68 | { | |
69 | struct ltt_ust_event *event; | |
70 | const struct ltt_ust_ht_key *key; | |
71 | ||
72 | assert(node); | |
73 | assert(_key); | |
74 | ||
75 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
76 | key = _key; | |
77 | ||
f19e9f8b | 78 | /* Match the 4 elements of the key: name, filter, loglevel, exclusions. */ |
18eace3b DG |
79 | |
80 | /* Event name */ | |
81 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
82 | goto no_match; |
83 | } | |
84 | ||
85 | /* Event loglevel. */ | |
86 | if (event->attr.loglevel != key->loglevel) { | |
025faf73 DG |
87 | if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL |
88 | && key->loglevel == 0 && event->attr.loglevel == -1) { | |
18eace3b | 89 | /* |
025faf73 DG |
90 | * Match is accepted. This is because on event creation, the |
91 | * loglevel is set to -1 if the event loglevel type is ALL so 0 and | |
92 | * -1 are accepted for this loglevel type since 0 is the one set by | |
93 | * the API when receiving an enable event. | |
18eace3b DG |
94 | */ |
95 | } else { | |
18eace3b DG |
96 | goto no_match; |
97 | } | |
98 | } | |
99 | ||
100 | /* Only one of the filters is NULL, fail. */ | |
101 | if ((key->filter && !event->filter) || (!key->filter && event->filter)) { | |
18eace3b DG |
102 | goto no_match; |
103 | } | |
104 | ||
025faf73 DG |
105 | if (key->filter && event->filter) { |
106 | /* Both filters exists, check length followed by the bytecode. */ | |
107 | if (event->filter->len != key->filter->len || | |
108 | memcmp(event->filter->data, key->filter->data, | |
109 | event->filter->len) != 0) { | |
110 | goto no_match; | |
111 | } | |
18eace3b DG |
112 | } |
113 | ||
f19e9f8b JI |
114 | /* If only one of the exclusions is NULL, fail. */ |
115 | if ((key->exclusion && !event->exclusion) || (!key->exclusion && event->exclusion)) { | |
116 | goto no_match; | |
117 | } | |
118 | ||
119 | if (key->exclusion && event->exclusion) { | |
120 | /* Both exclusions exist; check count followed by names. */ | |
121 | if (event->exclusion->count != key->exclusion->count || | |
122 | memcmp(event->exclusion->names, key->exclusion->names, | |
123 | event->exclusion->count * LTTNG_SYMBOL_NAME_LEN) != 0) { | |
124 | goto no_match; | |
125 | } | |
126 | } | |
025faf73 DG |
127 | /* Match. */ |
128 | return 1; | |
18eace3b DG |
129 | |
130 | no_match: | |
131 | return 0; | |
18eace3b DG |
132 | } |
133 | ||
0177d773 | 134 | /* |
2223c96f DG |
135 | * Find the channel in the hashtable and return channel pointer. RCU read side |
136 | * lock MUST be acquired before calling this. | |
0177d773 | 137 | */ |
bec39940 | 138 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 139 | char *name) |
0177d773 | 140 | { |
bec39940 DG |
141 | struct lttng_ht_node_str *node; |
142 | struct lttng_ht_iter iter; | |
0177d773 | 143 | |
85076754 MD |
144 | /* |
145 | * If we receive an empty string for channel name, it means the | |
146 | * default channel name is requested. | |
147 | */ | |
148 | if (name[0] == '\0') | |
149 | name = DEFAULT_CHANNEL_NAME; | |
150 | ||
bec39940 DG |
151 | lttng_ht_lookup(ht, (void *)name, &iter); |
152 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 153 | if (node == NULL) { |
44d3bd01 DG |
154 | goto error; |
155 | } | |
156 | ||
f6a9efaa | 157 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 158 | |
f6a9efaa | 159 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
160 | |
161 | error: | |
f6a9efaa | 162 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
163 | return NULL; |
164 | } | |
165 | ||
166 | /* | |
2223c96f DG |
167 | * Find the event in the hashtable and return event pointer. RCU read side lock |
168 | * MUST be acquired before calling this. | |
97ee3a89 | 169 | */ |
18eace3b DG |
170 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
171 | char *name, struct lttng_filter_bytecode *filter, int loglevel) | |
97ee3a89 | 172 | { |
bec39940 DG |
173 | struct lttng_ht_node_str *node; |
174 | struct lttng_ht_iter iter; | |
18eace3b | 175 | struct ltt_ust_ht_key key; |
97ee3a89 | 176 | |
18eace3b DG |
177 | assert(name); |
178 | assert(ht); | |
179 | ||
180 | key.name = name; | |
181 | key.filter = filter; | |
182 | key.loglevel = loglevel; | |
183 | ||
18eace3b DG |
184 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
185 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 186 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 187 | if (node == NULL) { |
97ee3a89 DG |
188 | goto error; |
189 | } | |
190 | ||
18eace3b | 191 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
192 | |
193 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
194 | |
195 | error: | |
18eace3b | 196 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
197 | return NULL; |
198 | } | |
199 | ||
200 | /* | |
201 | * Allocate and initialize a ust session data structure. | |
202 | * | |
203 | * Return pointer to structure or NULL. | |
204 | */ | |
d9bf3ca4 | 205 | struct ltt_ust_session *trace_ust_create_session(uint64_t session_id) |
97ee3a89 | 206 | { |
0475c50c | 207 | int ret; |
97ee3a89 DG |
208 | struct ltt_ust_session *lus; |
209 | ||
210 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 211 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 212 | if (lus == NULL) { |
ba7f0ae5 | 213 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
214 | goto error; |
215 | } | |
216 | ||
217 | /* Init data structure */ | |
a991f516 | 218 | lus->id = session_id; |
36dc12cc | 219 | lus->start_trace = 0; |
97ee3a89 | 220 | |
7972aab2 DG |
221 | /* |
222 | * Default buffer type. This can be changed through an enable channel | |
223 | * requesting a different type. Note that this can only be changed once | |
224 | * during the session lifetime which is at the first enable channel and | |
225 | * only before start. The flag buffer_type_changed indicates the status. | |
226 | */ | |
8692d4e5 | 227 | lus->buffer_type = LTTNG_BUFFER_PER_UID; |
7972aab2 DG |
228 | /* Once set to 1, the buffer_type is immutable for the session. */ |
229 | lus->buffer_type_changed = 0; | |
230 | /* Init it in case it get used after allocation. */ | |
231 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
232 | |
233 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 234 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
0475c50c DG |
235 | ret = jul_init_domain(&lus->domain_jul); |
236 | if (ret < 0) { | |
237 | goto error_consumer; | |
238 | } | |
44d3bd01 | 239 | |
00e2e675 DG |
240 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
241 | if (lus->consumer == NULL) { | |
09a90bcd | 242 | goto error_consumer; |
00e2e675 DG |
243 | } |
244 | ||
245 | /* | |
246 | * The tmp_consumer stays NULL until a set_consumer_uri command is | |
247 | * executed. At this point, the consumer should be nullify until an | |
248 | * enable_consumer command. This assignment is symbolic since we've zmalloc | |
249 | * the struct. | |
250 | */ | |
251 | lus->tmp_consumer = NULL; | |
252 | ||
44d3bd01 DG |
253 | DBG2("UST trace session create successful"); |
254 | ||
97ee3a89 DG |
255 | return lus; |
256 | ||
09a90bcd | 257 | error_consumer: |
0b2dc8df | 258 | ht_cleanup_push(lus->domain_global.channels); |
0475c50c | 259 | jul_destroy_domain(&lus->domain_jul); |
44844c29 | 260 | free(lus); |
97ee3a89 DG |
261 | error: |
262 | return NULL; | |
263 | } | |
264 | ||
265 | /* | |
266 | * Allocate and initialize a ust channel data structure. | |
267 | * | |
268 | * Return pointer to structure or NULL. | |
269 | */ | |
dec56f6c | 270 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan) |
97ee3a89 | 271 | { |
97ee3a89 DG |
272 | struct ltt_ust_channel *luc; |
273 | ||
0525e9ae | 274 | assert(chan); |
0525e9ae | 275 | |
37357452 | 276 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 277 | if (luc == NULL) { |
df0f840b | 278 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
279 | goto error; |
280 | } | |
281 | ||
44d3bd01 | 282 | /* Copy UST channel attributes */ |
48842b30 DG |
283 | luc->attr.overwrite = chan->attr.overwrite; |
284 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
285 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
286 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
287 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 288 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
289 | |
290 | /* Translate to UST output enum */ | |
291 | switch (luc->attr.output) { | |
292 | default: | |
293 | luc->attr.output = LTTNG_UST_MMAP; | |
294 | break; | |
97ee3a89 | 295 | } |
97ee3a89 | 296 | |
85076754 MD |
297 | /* |
298 | * If we receive an empty string for channel name, it means the | |
299 | * default channel name is requested. | |
300 | */ | |
301 | if (chan->name[0] == '\0') { | |
302 | strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name)); | |
303 | } else { | |
304 | /* Copy channel name */ | |
305 | strncpy(luc->name, chan->name, sizeof(luc->name)); | |
306 | } | |
97ee3a89 DG |
307 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
308 | ||
f6a9efaa | 309 | /* Init node */ |
bec39940 | 310 | lttng_ht_node_init_str(&luc->node, luc->name); |
31746f93 DG |
311 | CDS_INIT_LIST_HEAD(&luc->ctx_list); |
312 | ||
f6a9efaa | 313 | /* Alloc hash tables */ |
bec39940 DG |
314 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
315 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 316 | |
1624d5b7 JD |
317 | /* On-disk circular buffer parameters */ |
318 | luc->tracefile_size = chan->attr.tracefile_size; | |
319 | luc->tracefile_count = chan->attr.tracefile_count; | |
320 | ||
f6a9efaa DG |
321 | DBG2("Trace UST channel %s created", luc->name); |
322 | ||
97ee3a89 | 323 | error: |
7972aab2 | 324 | return luc; |
97ee3a89 DG |
325 | } |
326 | ||
327 | /* | |
328 | * Allocate and initialize a ust event. Set name and event type. | |
329 | * | |
330 | * Return pointer to structure or NULL. | |
331 | */ | |
025faf73 | 332 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
561c6897 JI |
333 | struct lttng_filter_bytecode *filter, |
334 | struct lttng_event_exclusion *exclusion) | |
97ee3a89 DG |
335 | { |
336 | struct ltt_ust_event *lue; | |
97ee3a89 | 337 | |
0525e9ae DG |
338 | assert(ev); |
339 | ||
37357452 | 340 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 341 | if (lue == NULL) { |
ba7f0ae5 | 342 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
343 | goto error; |
344 | } | |
345 | ||
346 | switch (ev->type) { | |
347 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 348 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
349 | break; |
350 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 351 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
352 | break; |
353 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 354 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
355 | break; |
356 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 357 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
358 | break; |
359 | default: | |
360 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 361 | goto error_free_event; |
97ee3a89 DG |
362 | } |
363 | ||
364 | /* Copy event name */ | |
44d3bd01 DG |
365 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
366 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 367 | |
0cda4f28 | 368 | switch (ev->loglevel_type) { |
8005f29a MD |
369 | case LTTNG_EVENT_LOGLEVEL_ALL: |
370 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 371 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 372 | break; |
8005f29a MD |
373 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
374 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 375 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
376 | break; |
377 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
378 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 379 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
380 | break; |
381 | default: | |
4431494b | 382 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
383 | goto error_free_event; |
384 | } | |
385 | ||
025faf73 DG |
386 | /* Same layout. */ |
387 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; | |
561c6897 | 388 | lue->exclusion = (struct lttng_event_exclusion *) exclusion; |
0cda4f28 | 389 | |
f6a9efaa | 390 | /* Init node */ |
bec39940 | 391 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 392 | |
300b8fd5 MD |
393 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
394 | lue->attr.name, lue->attr.loglevel_type, | |
395 | lue->attr.loglevel); | |
284d8f55 | 396 | |
97ee3a89 DG |
397 | return lue; |
398 | ||
44844c29 MD |
399 | error_free_event: |
400 | free(lue); | |
97ee3a89 DG |
401 | error: |
402 | return NULL; | |
403 | } | |
404 | ||
405 | /* | |
406 | * Allocate and initialize a ust metadata. | |
407 | * | |
408 | * Return pointer to structure or NULL. | |
409 | */ | |
410 | struct ltt_ust_metadata *trace_ust_create_metadata(char *path) | |
411 | { | |
412 | int ret; | |
413 | struct ltt_ust_metadata *lum; | |
97ee3a89 | 414 | |
0525e9ae DG |
415 | assert(path); |
416 | ||
3a009adb | 417 | lum = zmalloc(sizeof(struct ltt_ust_metadata)); |
44d3bd01 | 418 | if (lum == NULL) { |
df0f840b | 419 | PERROR("ust metadata zmalloc"); |
97ee3a89 DG |
420 | goto error; |
421 | } | |
422 | ||
423 | /* Set default attributes */ | |
44d3bd01 | 424 | lum->attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; |
3e230f92 | 425 | lum->attr.subbuf_size = default_get_metadata_subbuf_size(); |
44d3bd01 | 426 | lum->attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; |
0a9c6494 DG |
427 | lum->attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; |
428 | lum->attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
d41f73b7 | 429 | lum->attr.output = LTTNG_UST_MMAP; |
44d3bd01 | 430 | |
97ee3a89 DG |
431 | lum->handle = -1; |
432 | /* Set metadata trace path */ | |
30079b6b | 433 | ret = snprintf(lum->pathname, PATH_MAX, "%s/" DEFAULT_METADATA_NAME, path); |
97ee3a89 | 434 | if (ret < 0) { |
df0f840b | 435 | PERROR("asprintf ust metadata"); |
44844c29 | 436 | goto error_free_metadata; |
97ee3a89 DG |
437 | } |
438 | ||
439 | return lum; | |
440 | ||
44844c29 MD |
441 | error_free_metadata: |
442 | free(lum); | |
97ee3a89 DG |
443 | error: |
444 | return NULL; | |
445 | } | |
446 | ||
55cc08a6 DG |
447 | /* |
448 | * Allocate and initialize an UST context. | |
449 | * | |
450 | * Return pointer to structure or NULL. | |
451 | */ | |
452 | struct ltt_ust_context *trace_ust_create_context( | |
453 | struct lttng_event_context *ctx) | |
454 | { | |
455 | struct ltt_ust_context *uctx; | |
9197c5c4 MD |
456 | enum lttng_ust_context_type utype; |
457 | ||
0525e9ae DG |
458 | assert(ctx); |
459 | ||
9197c5c4 MD |
460 | switch (ctx->ctx) { |
461 | case LTTNG_EVENT_CONTEXT_VTID: | |
462 | utype = LTTNG_UST_CONTEXT_VTID; | |
463 | break; | |
464 | case LTTNG_EVENT_CONTEXT_VPID: | |
465 | utype = LTTNG_UST_CONTEXT_VPID; | |
466 | break; | |
467 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
468 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
469 | break; | |
470 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
471 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
472 | break; | |
7c612c2e WP |
473 | case LTTNG_EVENT_CONTEXT_IP: |
474 | utype = LTTNG_UST_CONTEXT_IP; | |
475 | break; | |
9197c5c4 MD |
476 | default: |
477 | ERR("Invalid UST context"); | |
478 | return NULL; | |
479 | } | |
55cc08a6 DG |
480 | |
481 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
482 | if (uctx == NULL) { | |
483 | PERROR("zmalloc ltt_ust_context"); | |
484 | goto error; | |
485 | } | |
486 | ||
9197c5c4 | 487 | uctx->ctx.ctx = utype; |
bec39940 | 488 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
31746f93 | 489 | CDS_INIT_LIST_HEAD(&uctx->list); |
55cc08a6 DG |
490 | |
491 | return uctx; | |
492 | ||
493 | error: | |
494 | return NULL; | |
495 | } | |
496 | ||
f6a9efaa DG |
497 | /* |
498 | * RCU safe free context structure. | |
499 | */ | |
500 | static void destroy_context_rcu(struct rcu_head *head) | |
501 | { | |
bec39940 DG |
502 | struct lttng_ht_node_ulong *node = |
503 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
504 | struct ltt_ust_context *ctx = |
505 | caa_container_of(node, struct ltt_ust_context, node); | |
506 | ||
507 | free(ctx); | |
508 | } | |
509 | ||
510 | /* | |
511 | * Cleanup UST context hash table. | |
512 | */ | |
7bd39047 | 513 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
514 | { |
515 | int ret; | |
bec39940 DG |
516 | struct lttng_ht_node_ulong *node; |
517 | struct lttng_ht_iter iter; | |
31746f93 | 518 | struct ltt_ust_context *ctx; |
f6a9efaa | 519 | |
0525e9ae DG |
520 | assert(ht); |
521 | ||
36b588ed | 522 | rcu_read_lock(); |
bec39940 | 523 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
31746f93 DG |
524 | /* Remove from ordered list. */ |
525 | ctx = caa_container_of(node, struct ltt_ust_context, node); | |
526 | cds_list_del(&ctx->list); | |
527 | /* Remove from channel's hash table. */ | |
bec39940 | 528 | ret = lttng_ht_del(ht, &iter); |
f6a9efaa DG |
529 | if (!ret) { |
530 | call_rcu(&node->head, destroy_context_rcu); | |
531 | } | |
f6a9efaa | 532 | } |
36b588ed | 533 | rcu_read_unlock(); |
ed52805d | 534 | |
0b2dc8df | 535 | ht_cleanup_push(ht); |
f6a9efaa DG |
536 | } |
537 | ||
97ee3a89 DG |
538 | /* |
539 | * Cleanup ust event structure. | |
540 | */ | |
541 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
542 | { | |
0525e9ae DG |
543 | assert(event); |
544 | ||
f6a9efaa | 545 | DBG2("Trace destroy UST event %s", event->attr.name); |
53a80697 | 546 | free(event->filter); |
97ee3a89 DG |
547 | free(event); |
548 | } | |
549 | ||
f6a9efaa DG |
550 | /* |
551 | * URCU intermediate call to complete destroy event. | |
552 | */ | |
553 | static void destroy_event_rcu(struct rcu_head *head) | |
554 | { | |
bec39940 DG |
555 | struct lttng_ht_node_str *node = |
556 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
557 | struct ltt_ust_event *event = |
558 | caa_container_of(node, struct ltt_ust_event, node); | |
559 | ||
560 | trace_ust_destroy_event(event); | |
561 | } | |
562 | ||
284d8f55 DG |
563 | /* |
564 | * Cleanup UST events hashtable. | |
565 | */ | |
7bd39047 | 566 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
567 | { |
568 | int ret; | |
bec39940 DG |
569 | struct lttng_ht_node_str *node; |
570 | struct lttng_ht_iter iter; | |
ed52805d | 571 | |
0525e9ae DG |
572 | assert(events); |
573 | ||
36b588ed | 574 | rcu_read_lock(); |
bec39940 DG |
575 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
576 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
577 | assert(!ret); |
578 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 579 | } |
36b588ed | 580 | rcu_read_unlock(); |
ed52805d | 581 | |
0b2dc8df | 582 | ht_cleanup_push(events); |
ed52805d DG |
583 | } |
584 | ||
97ee3a89 DG |
585 | /* |
586 | * Cleanup ust channel structure. | |
36b588ed MD |
587 | * |
588 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 589 | */ |
36b588ed | 590 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 591 | { |
0525e9ae DG |
592 | assert(channel); |
593 | ||
f6a9efaa | 594 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 595 | |
7bd39047 DG |
596 | /* Destroying all events of the channel */ |
597 | destroy_events(channel->events); | |
598 | /* Destroying all context of the channel */ | |
599 | destroy_contexts(channel->ctx); | |
97ee3a89 | 600 | |
97ee3a89 | 601 | free(channel); |
f6a9efaa DG |
602 | } |
603 | ||
604 | /* | |
605 | * URCU intermediate call to complete destroy channel. | |
606 | */ | |
607 | static void destroy_channel_rcu(struct rcu_head *head) | |
608 | { | |
bec39940 DG |
609 | struct lttng_ht_node_str *node = |
610 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
611 | struct ltt_ust_channel *channel = |
612 | caa_container_of(node, struct ltt_ust_channel, node); | |
613 | ||
36b588ed MD |
614 | _trace_ust_destroy_channel(channel); |
615 | } | |
616 | ||
617 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
618 | { | |
619 | call_rcu(&channel->node.head, destroy_channel_rcu); | |
97ee3a89 DG |
620 | } |
621 | ||
d5979e4a DG |
622 | /* |
623 | * Remove an UST channel from a channel HT. | |
624 | */ | |
625 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
626 | struct ltt_ust_channel *channel) | |
627 | { | |
628 | int ret; | |
629 | struct lttng_ht_iter iter; | |
630 | ||
631 | assert(ht); | |
632 | assert(channel); | |
633 | ||
634 | iter.iter.node = &channel->node.node; | |
635 | ret = lttng_ht_del(ht, &iter); | |
636 | assert(!ret); | |
637 | } | |
638 | ||
97ee3a89 DG |
639 | /* |
640 | * Cleanup ust metadata structure. | |
641 | */ | |
642 | void trace_ust_destroy_metadata(struct ltt_ust_metadata *metadata) | |
643 | { | |
0525e9ae DG |
644 | assert(metadata); |
645 | ||
abc9138a MD |
646 | if (!metadata->handle) { |
647 | return; | |
648 | } | |
f6a9efaa | 649 | DBG2("Trace UST destroy metadata %d", metadata->handle); |
97ee3a89 DG |
650 | free(metadata); |
651 | } | |
652 | ||
653 | /* | |
f6a9efaa | 654 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 655 | */ |
bec39940 | 656 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
657 | { |
658 | int ret; | |
bec39940 DG |
659 | struct lttng_ht_node_str *node; |
660 | struct lttng_ht_iter iter; | |
f6a9efaa | 661 | |
0525e9ae DG |
662 | assert(channels); |
663 | ||
24d1723f DG |
664 | rcu_read_lock(); |
665 | ||
bec39940 DG |
666 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
667 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
668 | assert(!ret); |
669 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 670 | } |
36b588ed | 671 | rcu_read_unlock(); |
ed52805d | 672 | |
0b2dc8df | 673 | ht_cleanup_push(channels); |
f6a9efaa DG |
674 | } |
675 | ||
f6a9efaa DG |
676 | /* |
677 | * Cleanup UST global domain. | |
678 | */ | |
679 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
680 | { | |
0525e9ae DG |
681 | assert(dom); |
682 | ||
f6a9efaa DG |
683 | destroy_channels(dom->channels); |
684 | } | |
97ee3a89 | 685 | |
f6a9efaa DG |
686 | /* |
687 | * Cleanup ust session structure | |
36b588ed MD |
688 | * |
689 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
690 | */ |
691 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
692 | { | |
7972aab2 DG |
693 | struct buffer_reg_uid *reg, *sreg; |
694 | ||
0525e9ae | 695 | assert(session); |
97ee3a89 | 696 | |
d9bf3ca4 | 697 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 698 | |
f6a9efaa DG |
699 | /* Cleaning up UST domain */ |
700 | destroy_domain_global(&session->domain_global); | |
0475c50c | 701 | jul_destroy_domain(&session->domain_jul); |
7972aab2 DG |
702 | |
703 | /* Cleanup UID buffer registry object(s). */ | |
704 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
705 | lnode) { | |
706 | cds_list_del(®->lnode); | |
707 | buffer_reg_uid_remove(reg); | |
708 | buffer_reg_uid_destroy(reg, session->consumer); | |
709 | } | |
44d3bd01 | 710 | |
3f8e211f DG |
711 | consumer_destroy_output(session->consumer); |
712 | consumer_destroy_output(session->tmp_consumer); | |
713 | ||
97ee3a89 DG |
714 | free(session); |
715 | } |