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 | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
97ee3a89 DG |
20 | #include <stdio.h> |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
d9bf3ca4 | 24 | #include <inttypes.h> |
97ee3a89 | 25 | |
990570ed DG |
26 | #include <common/common.h> |
27 | #include <common/defaults.h> | |
97ee3a89 | 28 | |
7972aab2 | 29 | #include "buffer-registry.h" |
97ee3a89 | 30 | #include "trace-ust.h" |
0b2dc8df | 31 | #include "utils.h" |
97ee3a89 | 32 | |
025faf73 DG |
33 | /* |
34 | * Match function for the events hash table lookup. | |
35 | * | |
36 | * Matches by name only. Used by the disable command. | |
37 | */ | |
18eace3b DG |
38 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
39 | const void *_key) | |
40 | { | |
41 | struct ltt_ust_event *event; | |
42 | const char *name; | |
43 | ||
44 | assert(node); | |
45 | assert(_key); | |
46 | ||
47 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
48 | name = _key; | |
49 | ||
50 | /* Event name */ | |
51 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
52 | goto no_match; | |
53 | } | |
54 | ||
025faf73 | 55 | /* Match */ |
18eace3b DG |
56 | return 1; |
57 | ||
58 | no_match: | |
59 | return 0; | |
60 | } | |
61 | ||
025faf73 DG |
62 | /* |
63 | * Match function for the hash table lookup. | |
64 | * | |
65 | * It matches an ust event based on three attributes which are the event name, | |
66 | * the filter bytecode and the loglevel. | |
67 | */ | |
18eace3b DG |
68 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
69 | { | |
70 | struct ltt_ust_event *event; | |
71 | const struct ltt_ust_ht_key *key; | |
72 | ||
73 | assert(node); | |
74 | assert(_key); | |
75 | ||
76 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
77 | key = _key; | |
78 | ||
f19e9f8b | 79 | /* Match the 4 elements of the key: name, filter, loglevel, exclusions. */ |
18eace3b DG |
80 | |
81 | /* Event name */ | |
82 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
83 | goto no_match; |
84 | } | |
85 | ||
86 | /* Event loglevel. */ | |
87 | if (event->attr.loglevel != key->loglevel) { | |
025faf73 DG |
88 | if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL |
89 | && key->loglevel == 0 && event->attr.loglevel == -1) { | |
18eace3b | 90 | /* |
025faf73 DG |
91 | * Match is accepted. This is because on event creation, the |
92 | * loglevel is set to -1 if the event loglevel type is ALL so 0 and | |
93 | * -1 are accepted for this loglevel type since 0 is the one set by | |
94 | * the API when receiving an enable event. | |
18eace3b DG |
95 | */ |
96 | } else { | |
18eace3b DG |
97 | goto no_match; |
98 | } | |
99 | } | |
100 | ||
101 | /* Only one of the filters is NULL, fail. */ | |
102 | if ((key->filter && !event->filter) || (!key->filter && event->filter)) { | |
18eace3b DG |
103 | goto no_match; |
104 | } | |
105 | ||
025faf73 DG |
106 | if (key->filter && event->filter) { |
107 | /* Both filters exists, check length followed by the bytecode. */ | |
108 | if (event->filter->len != key->filter->len || | |
109 | memcmp(event->filter->data, key->filter->data, | |
110 | event->filter->len) != 0) { | |
111 | goto no_match; | |
112 | } | |
18eace3b DG |
113 | } |
114 | ||
f19e9f8b JI |
115 | /* If only one of the exclusions is NULL, fail. */ |
116 | if ((key->exclusion && !event->exclusion) || (!key->exclusion && event->exclusion)) { | |
117 | goto no_match; | |
118 | } | |
119 | ||
120 | if (key->exclusion && event->exclusion) { | |
121 | /* Both exclusions exist; check count followed by names. */ | |
122 | if (event->exclusion->count != key->exclusion->count || | |
123 | memcmp(event->exclusion->names, key->exclusion->names, | |
124 | event->exclusion->count * LTTNG_SYMBOL_NAME_LEN) != 0) { | |
125 | goto no_match; | |
126 | } | |
127 | } | |
025faf73 DG |
128 | /* Match. */ |
129 | return 1; | |
18eace3b DG |
130 | |
131 | no_match: | |
132 | return 0; | |
18eace3b DG |
133 | } |
134 | ||
0177d773 | 135 | /* |
2223c96f DG |
136 | * Find the channel in the hashtable and return channel pointer. RCU read side |
137 | * lock MUST be acquired before calling this. | |
0177d773 | 138 | */ |
bec39940 | 139 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 140 | char *name) |
0177d773 | 141 | { |
bec39940 DG |
142 | struct lttng_ht_node_str *node; |
143 | struct lttng_ht_iter iter; | |
0177d773 | 144 | |
85076754 MD |
145 | /* |
146 | * If we receive an empty string for channel name, it means the | |
147 | * default channel name is requested. | |
148 | */ | |
149 | if (name[0] == '\0') | |
150 | name = DEFAULT_CHANNEL_NAME; | |
151 | ||
bec39940 DG |
152 | lttng_ht_lookup(ht, (void *)name, &iter); |
153 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 154 | if (node == NULL) { |
44d3bd01 DG |
155 | goto error; |
156 | } | |
157 | ||
f6a9efaa | 158 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 159 | |
f6a9efaa | 160 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
161 | |
162 | error: | |
f6a9efaa | 163 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
164 | return NULL; |
165 | } | |
166 | ||
167 | /* | |
2223c96f DG |
168 | * Find the event in the hashtable and return event pointer. RCU read side lock |
169 | * MUST be acquired before calling this. | |
97ee3a89 | 170 | */ |
18eace3b | 171 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
10646003 JI |
172 | char *name, struct lttng_filter_bytecode *filter, int loglevel, |
173 | struct lttng_event_exclusion *exclusion) | |
97ee3a89 | 174 | { |
bec39940 DG |
175 | struct lttng_ht_node_str *node; |
176 | struct lttng_ht_iter iter; | |
18eace3b | 177 | struct ltt_ust_ht_key key; |
97ee3a89 | 178 | |
18eace3b DG |
179 | assert(name); |
180 | assert(ht); | |
181 | ||
182 | key.name = name; | |
183 | key.filter = filter; | |
184 | key.loglevel = loglevel; | |
10646003 | 185 | key.exclusion = exclusion; |
18eace3b | 186 | |
18eace3b DG |
187 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
188 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 189 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 190 | if (node == NULL) { |
97ee3a89 DG |
191 | goto error; |
192 | } | |
193 | ||
18eace3b | 194 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
195 | |
196 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
197 | |
198 | error: | |
18eace3b | 199 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
200 | return NULL; |
201 | } | |
202 | ||
fefd409b DG |
203 | /* |
204 | * Lookup an agent in the session agents hash table by domain type and return | |
205 | * the object if found else NULL. | |
4da703ad JG |
206 | * |
207 | * RCU read side lock must be acquired before calling and only released | |
208 | * once the agent is no longer in scope or being used. | |
fefd409b DG |
209 | */ |
210 | struct agent *trace_ust_find_agent(struct ltt_ust_session *session, | |
211 | enum lttng_domain_type domain_type) | |
212 | { | |
213 | struct agent *agt = NULL; | |
214 | struct lttng_ht_node_u64 *node; | |
215 | struct lttng_ht_iter iter; | |
216 | uint64_t key; | |
217 | ||
218 | assert(session); | |
219 | ||
220 | DBG3("Trace ust agent lookup for domain %d", domain_type); | |
221 | ||
222 | key = domain_type; | |
223 | ||
224 | lttng_ht_lookup(session->agents, &key, &iter); | |
225 | node = lttng_ht_iter_get_node_u64(&iter); | |
226 | if (!node) { | |
227 | goto end; | |
228 | } | |
229 | agt = caa_container_of(node, struct agent, node); | |
230 | ||
231 | end: | |
232 | return agt; | |
233 | } | |
234 | ||
97ee3a89 DG |
235 | /* |
236 | * Allocate and initialize a ust session data structure. | |
237 | * | |
238 | * Return pointer to structure or NULL. | |
239 | */ | |
d9bf3ca4 | 240 | struct ltt_ust_session *trace_ust_create_session(uint64_t session_id) |
97ee3a89 DG |
241 | { |
242 | struct ltt_ust_session *lus; | |
243 | ||
244 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 245 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 246 | if (lus == NULL) { |
ba7f0ae5 | 247 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
248 | goto error; |
249 | } | |
250 | ||
251 | /* Init data structure */ | |
a991f516 | 252 | lus->id = session_id; |
14fb1ebe | 253 | lus->active = 0; |
97ee3a89 | 254 | |
84ad93e8 DG |
255 | /* Set default metadata channel attribute. */ |
256 | lus->metadata_attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
257 | lus->metadata_attr.subbuf_size = default_get_metadata_subbuf_size(); | |
258 | lus->metadata_attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; | |
259 | lus->metadata_attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; | |
260 | lus->metadata_attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
261 | lus->metadata_attr.output = LTTNG_UST_MMAP; | |
262 | ||
7972aab2 DG |
263 | /* |
264 | * Default buffer type. This can be changed through an enable channel | |
265 | * requesting a different type. Note that this can only be changed once | |
266 | * during the session lifetime which is at the first enable channel and | |
267 | * only before start. The flag buffer_type_changed indicates the status. | |
268 | */ | |
8692d4e5 | 269 | lus->buffer_type = LTTNG_BUFFER_PER_UID; |
7972aab2 DG |
270 | /* Once set to 1, the buffer_type is immutable for the session. */ |
271 | lus->buffer_type_changed = 0; | |
272 | /* Init it in case it get used after allocation. */ | |
273 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
274 | |
275 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 276 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
fefd409b DG |
277 | /* Alloc agent hash table. */ |
278 | lus->agents = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
44d3bd01 | 279 | |
00e2e675 DG |
280 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
281 | if (lus->consumer == NULL) { | |
09a90bcd | 282 | goto error_consumer; |
00e2e675 DG |
283 | } |
284 | ||
285 | /* | |
286 | * The tmp_consumer stays NULL until a set_consumer_uri command is | |
287 | * executed. At this point, the consumer should be nullify until an | |
288 | * enable_consumer command. This assignment is symbolic since we've zmalloc | |
289 | * the struct. | |
290 | */ | |
291 | lus->tmp_consumer = NULL; | |
292 | ||
44d3bd01 DG |
293 | DBG2("UST trace session create successful"); |
294 | ||
97ee3a89 DG |
295 | return lus; |
296 | ||
09a90bcd | 297 | error_consumer: |
0b2dc8df | 298 | ht_cleanup_push(lus->domain_global.channels); |
fefd409b | 299 | ht_cleanup_push(lus->agents); |
44844c29 | 300 | free(lus); |
97ee3a89 DG |
301 | error: |
302 | return NULL; | |
303 | } | |
304 | ||
305 | /* | |
306 | * Allocate and initialize a ust channel data structure. | |
307 | * | |
308 | * Return pointer to structure or NULL. | |
309 | */ | |
dec56f6c | 310 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan) |
97ee3a89 | 311 | { |
97ee3a89 DG |
312 | struct ltt_ust_channel *luc; |
313 | ||
0525e9ae | 314 | assert(chan); |
0525e9ae | 315 | |
37357452 | 316 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 317 | if (luc == NULL) { |
df0f840b | 318 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
319 | goto error; |
320 | } | |
321 | ||
44d3bd01 | 322 | /* Copy UST channel attributes */ |
48842b30 DG |
323 | luc->attr.overwrite = chan->attr.overwrite; |
324 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
325 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
326 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
327 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 328 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
329 | |
330 | /* Translate to UST output enum */ | |
331 | switch (luc->attr.output) { | |
332 | default: | |
333 | luc->attr.output = LTTNG_UST_MMAP; | |
334 | break; | |
97ee3a89 | 335 | } |
97ee3a89 | 336 | |
85076754 MD |
337 | /* |
338 | * If we receive an empty string for channel name, it means the | |
339 | * default channel name is requested. | |
340 | */ | |
341 | if (chan->name[0] == '\0') { | |
342 | strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name)); | |
343 | } else { | |
344 | /* Copy channel name */ | |
345 | strncpy(luc->name, chan->name, sizeof(luc->name)); | |
346 | } | |
97ee3a89 DG |
347 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
348 | ||
f6a9efaa | 349 | /* Init node */ |
bec39940 | 350 | lttng_ht_node_init_str(&luc->node, luc->name); |
31746f93 DG |
351 | CDS_INIT_LIST_HEAD(&luc->ctx_list); |
352 | ||
f6a9efaa | 353 | /* Alloc hash tables */ |
bec39940 DG |
354 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
355 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 356 | |
1624d5b7 JD |
357 | /* On-disk circular buffer parameters */ |
358 | luc->tracefile_size = chan->attr.tracefile_size; | |
359 | luc->tracefile_count = chan->attr.tracefile_count; | |
360 | ||
f6a9efaa DG |
361 | DBG2("Trace UST channel %s created", luc->name); |
362 | ||
97ee3a89 | 363 | error: |
7972aab2 | 364 | return luc; |
97ee3a89 DG |
365 | } |
366 | ||
367 | /* | |
368 | * Allocate and initialize a ust event. Set name and event type. | |
49d21f93 | 369 | * We own filter_expression, filter, and exclusion. |
97ee3a89 DG |
370 | * |
371 | * Return pointer to structure or NULL. | |
372 | */ | |
025faf73 | 373 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
6b453b5e | 374 | char *filter_expression, |
561c6897 JI |
375 | struct lttng_filter_bytecode *filter, |
376 | struct lttng_event_exclusion *exclusion) | |
97ee3a89 DG |
377 | { |
378 | struct ltt_ust_event *lue; | |
97ee3a89 | 379 | |
0525e9ae DG |
380 | assert(ev); |
381 | ||
37357452 | 382 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 383 | if (lue == NULL) { |
ba7f0ae5 | 384 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
385 | goto error; |
386 | } | |
387 | ||
388 | switch (ev->type) { | |
389 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 390 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
391 | break; |
392 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 393 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
394 | break; |
395 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 396 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
397 | break; |
398 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 399 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
400 | break; |
401 | default: | |
402 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 403 | goto error_free_event; |
97ee3a89 DG |
404 | } |
405 | ||
406 | /* Copy event name */ | |
44d3bd01 DG |
407 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
408 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 409 | |
0cda4f28 | 410 | switch (ev->loglevel_type) { |
8005f29a MD |
411 | case LTTNG_EVENT_LOGLEVEL_ALL: |
412 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 413 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 414 | break; |
8005f29a MD |
415 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
416 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 417 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
418 | break; |
419 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
420 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 421 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
422 | break; |
423 | default: | |
4431494b | 424 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
425 | goto error_free_event; |
426 | } | |
427 | ||
025faf73 | 428 | /* Same layout. */ |
6b453b5e | 429 | lue->filter_expression = filter_expression; |
025faf73 | 430 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; |
561c6897 | 431 | lue->exclusion = (struct lttng_event_exclusion *) exclusion; |
0cda4f28 | 432 | |
f6a9efaa | 433 | /* Init node */ |
bec39940 | 434 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 435 | |
300b8fd5 MD |
436 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
437 | lue->attr.name, lue->attr.loglevel_type, | |
438 | lue->attr.loglevel); | |
284d8f55 | 439 | |
97ee3a89 DG |
440 | return lue; |
441 | ||
44844c29 MD |
442 | error_free_event: |
443 | free(lue); | |
97ee3a89 | 444 | error: |
49d21f93 MD |
445 | free(filter_expression); |
446 | free(filter); | |
447 | free(exclusion); | |
97ee3a89 DG |
448 | return NULL; |
449 | } | |
450 | ||
aa3514e9 MD |
451 | static |
452 | int trace_ust_context_type_event_to_ust(enum lttng_event_context_type type) | |
55cc08a6 | 453 | { |
aa3514e9 | 454 | int utype; |
0525e9ae | 455 | |
aa3514e9 | 456 | switch (type) { |
9197c5c4 MD |
457 | case LTTNG_EVENT_CONTEXT_VTID: |
458 | utype = LTTNG_UST_CONTEXT_VTID; | |
459 | break; | |
460 | case LTTNG_EVENT_CONTEXT_VPID: | |
461 | utype = LTTNG_UST_CONTEXT_VPID; | |
462 | break; | |
463 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
464 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
465 | break; | |
466 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
467 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
468 | break; | |
7c612c2e WP |
469 | case LTTNG_EVENT_CONTEXT_IP: |
470 | utype = LTTNG_UST_CONTEXT_IP; | |
471 | break; | |
aa3514e9 MD |
472 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: |
473 | utype = LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER; | |
474 | break; | |
9197c5c4 MD |
475 | default: |
476 | ERR("Invalid UST context"); | |
aa3514e9 MD |
477 | utype = -1; |
478 | break; | |
479 | } | |
480 | return utype; | |
481 | } | |
482 | ||
483 | /* | |
484 | * Return 1 if contexts match, 0 otherwise. | |
485 | */ | |
486 | int trace_ust_match_context(struct ltt_ust_context *uctx, | |
487 | struct lttng_event_context *ctx) | |
488 | { | |
489 | int utype; | |
490 | ||
491 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
492 | if (utype < 0) { | |
493 | return 0; | |
494 | } | |
495 | if (uctx->ctx.ctx != utype) { | |
496 | return 0; | |
497 | } | |
498 | switch (utype) { | |
499 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
500 | if (uctx->ctx.u.perf_counter.type | |
501 | != ctx->u.perf_counter.type) { | |
502 | return 0; | |
503 | } | |
504 | if (uctx->ctx.u.perf_counter.config | |
505 | != ctx->u.perf_counter.config) { | |
506 | return 0; | |
507 | } | |
508 | if (strncmp(uctx->ctx.u.perf_counter.name, | |
509 | ctx->u.perf_counter.name, | |
510 | LTTNG_UST_SYM_NAME_LEN)) { | |
511 | return 0; | |
512 | } | |
513 | break; | |
514 | default: | |
515 | break; | |
516 | ||
517 | } | |
518 | return 1; | |
519 | } | |
520 | ||
521 | /* | |
522 | * Allocate and initialize an UST context. | |
523 | * | |
524 | * Return pointer to structure or NULL. | |
525 | */ | |
526 | struct ltt_ust_context *trace_ust_create_context( | |
527 | struct lttng_event_context *ctx) | |
528 | { | |
529 | struct ltt_ust_context *uctx; | |
530 | int utype; | |
531 | ||
532 | assert(ctx); | |
533 | ||
534 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
535 | if (utype < 0) { | |
9197c5c4 MD |
536 | return NULL; |
537 | } | |
55cc08a6 DG |
538 | |
539 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
540 | if (uctx == NULL) { | |
541 | PERROR("zmalloc ltt_ust_context"); | |
542 | goto error; | |
543 | } | |
544 | ||
aa3514e9 MD |
545 | uctx->ctx.ctx = (enum lttng_ust_context_type) utype; |
546 | switch (utype) { | |
547 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
548 | uctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; | |
549 | uctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
550 | strncpy(uctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
551 | LTTNG_UST_SYM_NAME_LEN); | |
552 | uctx->ctx.u.perf_counter.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
553 | break; | |
554 | default: | |
555 | break; | |
556 | } | |
bec39940 | 557 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
558 | |
559 | return uctx; | |
560 | ||
561 | error: | |
562 | return NULL; | |
563 | } | |
564 | ||
f6a9efaa DG |
565 | /* |
566 | * RCU safe free context structure. | |
567 | */ | |
568 | static void destroy_context_rcu(struct rcu_head *head) | |
569 | { | |
bec39940 DG |
570 | struct lttng_ht_node_ulong *node = |
571 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
572 | struct ltt_ust_context *ctx = |
573 | caa_container_of(node, struct ltt_ust_context, node); | |
574 | ||
575 | free(ctx); | |
576 | } | |
577 | ||
578 | /* | |
579 | * Cleanup UST context hash table. | |
580 | */ | |
7bd39047 | 581 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
582 | { |
583 | int ret; | |
bec39940 DG |
584 | struct lttng_ht_node_ulong *node; |
585 | struct lttng_ht_iter iter; | |
31746f93 | 586 | struct ltt_ust_context *ctx; |
f6a9efaa | 587 | |
0525e9ae DG |
588 | assert(ht); |
589 | ||
36b588ed | 590 | rcu_read_lock(); |
bec39940 | 591 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
31746f93 DG |
592 | /* Remove from ordered list. */ |
593 | ctx = caa_container_of(node, struct ltt_ust_context, node); | |
594 | cds_list_del(&ctx->list); | |
595 | /* Remove from channel's hash table. */ | |
bec39940 | 596 | ret = lttng_ht_del(ht, &iter); |
f6a9efaa DG |
597 | if (!ret) { |
598 | call_rcu(&node->head, destroy_context_rcu); | |
599 | } | |
f6a9efaa | 600 | } |
36b588ed | 601 | rcu_read_unlock(); |
ed52805d | 602 | |
0b2dc8df | 603 | ht_cleanup_push(ht); |
f6a9efaa DG |
604 | } |
605 | ||
97ee3a89 DG |
606 | /* |
607 | * Cleanup ust event structure. | |
608 | */ | |
609 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
610 | { | |
0525e9ae DG |
611 | assert(event); |
612 | ||
f6a9efaa | 613 | DBG2("Trace destroy UST event %s", event->attr.name); |
6b453b5e | 614 | free(event->filter_expression); |
53a80697 | 615 | free(event->filter); |
40024f8a | 616 | free(event->exclusion); |
97ee3a89 DG |
617 | free(event); |
618 | } | |
619 | ||
f6a9efaa DG |
620 | /* |
621 | * URCU intermediate call to complete destroy event. | |
622 | */ | |
623 | static void destroy_event_rcu(struct rcu_head *head) | |
624 | { | |
bec39940 DG |
625 | struct lttng_ht_node_str *node = |
626 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
627 | struct ltt_ust_event *event = |
628 | caa_container_of(node, struct ltt_ust_event, node); | |
629 | ||
630 | trace_ust_destroy_event(event); | |
631 | } | |
632 | ||
284d8f55 DG |
633 | /* |
634 | * Cleanup UST events hashtable. | |
635 | */ | |
7bd39047 | 636 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
637 | { |
638 | int ret; | |
bec39940 DG |
639 | struct lttng_ht_node_str *node; |
640 | struct lttng_ht_iter iter; | |
ed52805d | 641 | |
0525e9ae DG |
642 | assert(events); |
643 | ||
36b588ed | 644 | rcu_read_lock(); |
bec39940 DG |
645 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
646 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
647 | assert(!ret); |
648 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 649 | } |
36b588ed | 650 | rcu_read_unlock(); |
ed52805d | 651 | |
0b2dc8df | 652 | ht_cleanup_push(events); |
ed52805d DG |
653 | } |
654 | ||
97ee3a89 DG |
655 | /* |
656 | * Cleanup ust channel structure. | |
36b588ed MD |
657 | * |
658 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 659 | */ |
36b588ed | 660 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 661 | { |
0525e9ae DG |
662 | assert(channel); |
663 | ||
f6a9efaa | 664 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 665 | |
7bd39047 DG |
666 | /* Destroying all events of the channel */ |
667 | destroy_events(channel->events); | |
668 | /* Destroying all context of the channel */ | |
669 | destroy_contexts(channel->ctx); | |
97ee3a89 | 670 | |
97ee3a89 | 671 | free(channel); |
f6a9efaa DG |
672 | } |
673 | ||
674 | /* | |
675 | * URCU intermediate call to complete destroy channel. | |
676 | */ | |
677 | static void destroy_channel_rcu(struct rcu_head *head) | |
678 | { | |
bec39940 DG |
679 | struct lttng_ht_node_str *node = |
680 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
681 | struct ltt_ust_channel *channel = |
682 | caa_container_of(node, struct ltt_ust_channel, node); | |
683 | ||
36b588ed MD |
684 | _trace_ust_destroy_channel(channel); |
685 | } | |
686 | ||
687 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
688 | { | |
689 | call_rcu(&channel->node.head, destroy_channel_rcu); | |
97ee3a89 DG |
690 | } |
691 | ||
d5979e4a DG |
692 | /* |
693 | * Remove an UST channel from a channel HT. | |
694 | */ | |
695 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
696 | struct ltt_ust_channel *channel) | |
697 | { | |
698 | int ret; | |
699 | struct lttng_ht_iter iter; | |
700 | ||
701 | assert(ht); | |
702 | assert(channel); | |
703 | ||
704 | iter.iter.node = &channel->node.node; | |
705 | ret = lttng_ht_del(ht, &iter); | |
706 | assert(!ret); | |
707 | } | |
708 | ||
97ee3a89 | 709 | /* |
f6a9efaa | 710 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 711 | */ |
bec39940 | 712 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
713 | { |
714 | int ret; | |
bec39940 DG |
715 | struct lttng_ht_node_str *node; |
716 | struct lttng_ht_iter iter; | |
f6a9efaa | 717 | |
0525e9ae DG |
718 | assert(channels); |
719 | ||
24d1723f DG |
720 | rcu_read_lock(); |
721 | ||
bec39940 DG |
722 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
723 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
724 | assert(!ret); |
725 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 726 | } |
36b588ed | 727 | rcu_read_unlock(); |
ed52805d | 728 | |
0b2dc8df | 729 | ht_cleanup_push(channels); |
f6a9efaa DG |
730 | } |
731 | ||
f6a9efaa DG |
732 | /* |
733 | * Cleanup UST global domain. | |
734 | */ | |
735 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
736 | { | |
0525e9ae DG |
737 | assert(dom); |
738 | ||
f6a9efaa DG |
739 | destroy_channels(dom->channels); |
740 | } | |
97ee3a89 | 741 | |
f6a9efaa DG |
742 | /* |
743 | * Cleanup ust session structure | |
36b588ed MD |
744 | * |
745 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
746 | */ |
747 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
748 | { | |
fefd409b | 749 | struct agent *agt; |
7972aab2 | 750 | struct buffer_reg_uid *reg, *sreg; |
fefd409b | 751 | struct lttng_ht_iter iter; |
7972aab2 | 752 | |
0525e9ae | 753 | assert(session); |
97ee3a89 | 754 | |
d9bf3ca4 | 755 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 756 | |
f6a9efaa DG |
757 | /* Cleaning up UST domain */ |
758 | destroy_domain_global(&session->domain_global); | |
fefd409b | 759 | |
0c0fcd77 | 760 | rcu_read_lock(); |
fefd409b | 761 | cds_lfht_for_each_entry(session->agents->ht, &iter.iter, agt, node.node) { |
d0edf546 JG |
762 | int ret = lttng_ht_del(session->agents, &iter); |
763 | ||
764 | assert(!ret); | |
fefd409b DG |
765 | agent_destroy(agt); |
766 | } | |
0c0fcd77 | 767 | rcu_read_unlock(); |
7972aab2 | 768 | |
8ada2175 MD |
769 | ht_cleanup_push(session->agents); |
770 | ||
7972aab2 DG |
771 | /* Cleanup UID buffer registry object(s). */ |
772 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
773 | lnode) { | |
774 | cds_list_del(®->lnode); | |
775 | buffer_reg_uid_remove(reg); | |
776 | buffer_reg_uid_destroy(reg, session->consumer); | |
777 | } | |
44d3bd01 | 778 | |
3f8e211f DG |
779 | consumer_destroy_output(session->consumer); |
780 | consumer_destroy_output(session->tmp_consumer); | |
781 | ||
97ee3a89 DG |
782 | free(session); |
783 | } |