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