Commit | Line | Data |
---|---|---|
97ee3a89 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
bdf64013 | 3 | * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com> |
97ee3a89 | 4 | * |
d14d33bf AM |
5 | * This program is free software; you can redistribute it and/or modify |
6 | * it under the terms of the GNU General Public License, version 2 only, | |
7 | * as published by the Free Software Foundation. | |
97ee3a89 | 8 | * |
d14d33bf AM |
9 | * This program is distributed in the hope that it will be useful, |
10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
12 | * GNU General Public License for more details. | |
97ee3a89 | 13 | * |
d14d33bf AM |
14 | * You should have received a copy of the GNU General Public License along |
15 | * with this program; if not, write to the Free Software Foundation, Inc., | |
16 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
97ee3a89 DG |
17 | */ |
18 | ||
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" |
a9ad0c8f | 32 | #include "ust-app.h" |
7c1d2758 | 33 | #include "agent.h" |
97ee3a89 | 34 | |
025faf73 DG |
35 | /* |
36 | * Match function for the events hash table lookup. | |
37 | * | |
38 | * Matches by name only. Used by the disable command. | |
39 | */ | |
18eace3b DG |
40 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
41 | const void *_key) | |
42 | { | |
43 | struct ltt_ust_event *event; | |
44 | const char *name; | |
45 | ||
46 | assert(node); | |
47 | assert(_key); | |
48 | ||
49 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
50 | name = _key; | |
51 | ||
52 | /* Event name */ | |
53 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
54 | goto no_match; | |
55 | } | |
56 | ||
025faf73 | 57 | /* Match */ |
18eace3b DG |
58 | return 1; |
59 | ||
60 | no_match: | |
61 | return 0; | |
62 | } | |
63 | ||
025faf73 DG |
64 | /* |
65 | * Match function for the hash table lookup. | |
66 | * | |
67 | * It matches an ust event based on three attributes which are the event name, | |
68 | * the filter bytecode and the loglevel. | |
69 | */ | |
18eace3b DG |
70 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
71 | { | |
72 | struct ltt_ust_event *event; | |
73 | const struct ltt_ust_ht_key *key; | |
2106efa0 | 74 | int ev_loglevel_value; |
19a97244 | 75 | int ll_match; |
18eace3b DG |
76 | |
77 | assert(node); | |
78 | assert(_key); | |
79 | ||
80 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
81 | key = _key; | |
2106efa0 | 82 | ev_loglevel_value = event->attr.loglevel; |
18eace3b | 83 | |
f19e9f8b | 84 | /* Match the 4 elements of the key: name, filter, loglevel, exclusions. */ |
18eace3b DG |
85 | |
86 | /* Event name */ | |
87 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
88 | goto no_match; |
89 | } | |
90 | ||
b953b8cd | 91 | /* Event loglevel value and type. */ |
19a97244 PP |
92 | ll_match = loglevels_match(event->attr.loglevel_type, |
93 | ev_loglevel_value, key->loglevel_type, | |
94 | key->loglevel_value, LTTNG_UST_LOGLEVEL_ALL); | |
95 | ||
96 | if (!ll_match) { | |
b953b8cd | 97 | goto no_match; |
18eace3b DG |
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) { | |
a5b7e00c PP |
120 | size_t i; |
121 | ||
122 | /* Check exclusion counts first. */ | |
123 | if (event->exclusion->count != key->exclusion->count) { | |
f19e9f8b JI |
124 | goto no_match; |
125 | } | |
a5b7e00c PP |
126 | |
127 | /* Compare names individually. */ | |
128 | for (i = 0; i < event->exclusion->count; ++i) { | |
129 | size_t j; | |
130 | bool found = false; | |
131 | const char *name_ev = | |
132 | LTTNG_EVENT_EXCLUSION_NAME_AT( | |
133 | event->exclusion, i); | |
134 | ||
135 | /* | |
136 | * Compare this exclusion name to all the key's | |
137 | * exclusion names. | |
138 | */ | |
139 | for (j = 0; j < key->exclusion->count; ++j) { | |
140 | const char *name_key = | |
141 | LTTNG_EVENT_EXCLUSION_NAME_AT( | |
142 | key->exclusion, j); | |
143 | ||
144 | if (!strncmp(name_ev, name_key, | |
145 | LTTNG_SYMBOL_NAME_LEN)) { | |
146 | /* Names match! */ | |
147 | found = true; | |
148 | break; | |
149 | } | |
150 | } | |
151 | ||
152 | /* | |
153 | * If the current exclusion name was not found amongst | |
154 | * the key's exclusion names, then there's no match. | |
155 | */ | |
156 | if (!found) { | |
157 | goto no_match; | |
158 | } | |
159 | } | |
f19e9f8b | 160 | } |
025faf73 DG |
161 | /* Match. */ |
162 | return 1; | |
18eace3b DG |
163 | |
164 | no_match: | |
165 | return 0; | |
18eace3b DG |
166 | } |
167 | ||
0177d773 | 168 | /* |
2223c96f DG |
169 | * Find the channel in the hashtable and return channel pointer. RCU read side |
170 | * lock MUST be acquired before calling this. | |
0177d773 | 171 | */ |
bec39940 | 172 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 173 | char *name) |
0177d773 | 174 | { |
bec39940 DG |
175 | struct lttng_ht_node_str *node; |
176 | struct lttng_ht_iter iter; | |
0177d773 | 177 | |
85076754 MD |
178 | /* |
179 | * If we receive an empty string for channel name, it means the | |
180 | * default channel name is requested. | |
181 | */ | |
182 | if (name[0] == '\0') | |
183 | name = DEFAULT_CHANNEL_NAME; | |
184 | ||
bec39940 DG |
185 | lttng_ht_lookup(ht, (void *)name, &iter); |
186 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 187 | if (node == NULL) { |
44d3bd01 DG |
188 | goto error; |
189 | } | |
190 | ||
f6a9efaa | 191 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 192 | |
f6a9efaa | 193 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
194 | |
195 | error: | |
f6a9efaa | 196 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
197 | return NULL; |
198 | } | |
199 | ||
200 | /* | |
2223c96f DG |
201 | * Find the event in the hashtable and return event pointer. RCU read side lock |
202 | * MUST be acquired before calling this. | |
97ee3a89 | 203 | */ |
18eace3b | 204 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
2106efa0 | 205 | char *name, struct lttng_filter_bytecode *filter, |
b953b8cd PP |
206 | enum lttng_ust_loglevel_type loglevel_type, int loglevel_value, |
207 | struct lttng_event_exclusion *exclusion) | |
97ee3a89 | 208 | { |
bec39940 DG |
209 | struct lttng_ht_node_str *node; |
210 | struct lttng_ht_iter iter; | |
18eace3b | 211 | struct ltt_ust_ht_key key; |
97ee3a89 | 212 | |
18eace3b DG |
213 | assert(name); |
214 | assert(ht); | |
215 | ||
216 | key.name = name; | |
217 | key.filter = filter; | |
b953b8cd PP |
218 | key.loglevel_type = loglevel_type; |
219 | key.loglevel_value = loglevel_value; | |
10646003 | 220 | key.exclusion = exclusion; |
18eace3b | 221 | |
18eace3b DG |
222 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
223 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 224 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 225 | if (node == NULL) { |
97ee3a89 DG |
226 | goto error; |
227 | } | |
228 | ||
18eace3b | 229 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
230 | |
231 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
232 | |
233 | error: | |
18eace3b | 234 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
235 | return NULL; |
236 | } | |
237 | ||
fefd409b DG |
238 | /* |
239 | * Lookup an agent in the session agents hash table by domain type and return | |
240 | * the object if found else NULL. | |
4da703ad JG |
241 | * |
242 | * RCU read side lock must be acquired before calling and only released | |
243 | * once the agent is no longer in scope or being used. | |
fefd409b DG |
244 | */ |
245 | struct agent *trace_ust_find_agent(struct ltt_ust_session *session, | |
246 | enum lttng_domain_type domain_type) | |
247 | { | |
248 | struct agent *agt = NULL; | |
249 | struct lttng_ht_node_u64 *node; | |
250 | struct lttng_ht_iter iter; | |
251 | uint64_t key; | |
252 | ||
253 | assert(session); | |
254 | ||
255 | DBG3("Trace ust agent lookup for domain %d", domain_type); | |
256 | ||
257 | key = domain_type; | |
258 | ||
259 | lttng_ht_lookup(session->agents, &key, &iter); | |
260 | node = lttng_ht_iter_get_node_u64(&iter); | |
261 | if (!node) { | |
262 | goto end; | |
263 | } | |
264 | agt = caa_container_of(node, struct agent, node); | |
265 | ||
266 | end: | |
267 | return agt; | |
268 | } | |
269 | ||
97ee3a89 DG |
270 | /* |
271 | * Allocate and initialize a ust session data structure. | |
272 | * | |
273 | * Return pointer to structure or NULL. | |
274 | */ | |
d9bf3ca4 | 275 | struct ltt_ust_session *trace_ust_create_session(uint64_t session_id) |
97ee3a89 DG |
276 | { |
277 | struct ltt_ust_session *lus; | |
278 | ||
279 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 280 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 281 | if (lus == NULL) { |
ba7f0ae5 | 282 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
283 | goto error; |
284 | } | |
285 | ||
286 | /* Init data structure */ | |
a991f516 | 287 | lus->id = session_id; |
14fb1ebe | 288 | lus->active = 0; |
97ee3a89 | 289 | |
84ad93e8 DG |
290 | /* Set default metadata channel attribute. */ |
291 | lus->metadata_attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
292 | lus->metadata_attr.subbuf_size = default_get_metadata_subbuf_size(); | |
293 | lus->metadata_attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; | |
294 | lus->metadata_attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; | |
295 | lus->metadata_attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
296 | lus->metadata_attr.output = LTTNG_UST_MMAP; | |
297 | ||
7972aab2 DG |
298 | /* |
299 | * Default buffer type. This can be changed through an enable channel | |
300 | * requesting a different type. Note that this can only be changed once | |
301 | * during the session lifetime which is at the first enable channel and | |
302 | * only before start. The flag buffer_type_changed indicates the status. | |
303 | */ | |
8692d4e5 | 304 | lus->buffer_type = LTTNG_BUFFER_PER_UID; |
7972aab2 DG |
305 | /* Once set to 1, the buffer_type is immutable for the session. */ |
306 | lus->buffer_type_changed = 0; | |
307 | /* Init it in case it get used after allocation. */ | |
308 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
309 | |
310 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 311 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
fefd409b DG |
312 | /* Alloc agent hash table. */ |
313 | lus->agents = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
44d3bd01 | 314 | |
00e2e675 DG |
315 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
316 | if (lus->consumer == NULL) { | |
09a90bcd | 317 | goto error_consumer; |
00e2e675 DG |
318 | } |
319 | ||
44d3bd01 DG |
320 | DBG2("UST trace session create successful"); |
321 | ||
97ee3a89 DG |
322 | return lus; |
323 | ||
09a90bcd | 324 | error_consumer: |
0b2dc8df | 325 | ht_cleanup_push(lus->domain_global.channels); |
fefd409b | 326 | ht_cleanup_push(lus->agents); |
44844c29 | 327 | free(lus); |
97ee3a89 DG |
328 | error: |
329 | return NULL; | |
330 | } | |
331 | ||
332 | /* | |
333 | * Allocate and initialize a ust channel data structure. | |
334 | * | |
335 | * Return pointer to structure or NULL. | |
336 | */ | |
51755dc8 JG |
337 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan, |
338 | enum lttng_domain_type domain) | |
97ee3a89 | 339 | { |
97ee3a89 DG |
340 | struct ltt_ust_channel *luc; |
341 | ||
0525e9ae | 342 | assert(chan); |
0525e9ae | 343 | |
37357452 | 344 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 345 | if (luc == NULL) { |
df0f840b | 346 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
347 | goto error; |
348 | } | |
349 | ||
51755dc8 JG |
350 | luc->domain = domain; |
351 | ||
44d3bd01 | 352 | /* Copy UST channel attributes */ |
48842b30 DG |
353 | luc->attr.overwrite = chan->attr.overwrite; |
354 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
355 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
356 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
357 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 358 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
359 | |
360 | /* Translate to UST output enum */ | |
361 | switch (luc->attr.output) { | |
362 | default: | |
363 | luc->attr.output = LTTNG_UST_MMAP; | |
364 | break; | |
97ee3a89 | 365 | } |
97ee3a89 | 366 | |
85076754 MD |
367 | /* |
368 | * If we receive an empty string for channel name, it means the | |
369 | * default channel name is requested. | |
370 | */ | |
371 | if (chan->name[0] == '\0') { | |
372 | strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name)); | |
373 | } else { | |
374 | /* Copy channel name */ | |
375 | strncpy(luc->name, chan->name, sizeof(luc->name)); | |
376 | } | |
97ee3a89 DG |
377 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
378 | ||
f6a9efaa | 379 | /* Init node */ |
bec39940 | 380 | lttng_ht_node_init_str(&luc->node, luc->name); |
31746f93 DG |
381 | CDS_INIT_LIST_HEAD(&luc->ctx_list); |
382 | ||
f6a9efaa | 383 | /* Alloc hash tables */ |
bec39940 DG |
384 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
385 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 386 | |
1624d5b7 JD |
387 | /* On-disk circular buffer parameters */ |
388 | luc->tracefile_size = chan->attr.tracefile_size; | |
389 | luc->tracefile_count = chan->attr.tracefile_count; | |
390 | ||
f6a9efaa DG |
391 | DBG2("Trace UST channel %s created", luc->name); |
392 | ||
97ee3a89 | 393 | error: |
7972aab2 | 394 | return luc; |
97ee3a89 DG |
395 | } |
396 | ||
ad11a1d3 PP |
397 | /* |
398 | * Validates an exclusion list. | |
399 | * | |
400 | * Returns 0 if valid, negative value if invalid. | |
401 | */ | |
402 | static int validate_exclusion(struct lttng_event_exclusion *exclusion) | |
403 | { | |
404 | size_t i; | |
405 | int ret = 0; | |
406 | ||
407 | assert(exclusion); | |
408 | ||
409 | for (i = 0; i < exclusion->count; ++i) { | |
410 | size_t j; | |
411 | const char *name_a = | |
412 | LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
413 | ||
414 | for (j = 0; j < i; ++j) { | |
415 | const char *name_b = | |
416 | LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, j); | |
417 | ||
418 | if (!strncmp(name_a, name_b, LTTNG_SYMBOL_NAME_LEN)) { | |
419 | /* Match! */ | |
420 | ret = -1; | |
421 | goto end; | |
422 | } | |
423 | } | |
424 | } | |
425 | ||
426 | end: | |
427 | return ret; | |
428 | } | |
429 | ||
97ee3a89 DG |
430 | /* |
431 | * Allocate and initialize a ust event. Set name and event type. | |
49d21f93 | 432 | * We own filter_expression, filter, and exclusion. |
97ee3a89 DG |
433 | * |
434 | * Return pointer to structure or NULL. | |
435 | */ | |
025faf73 | 436 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
6b453b5e | 437 | char *filter_expression, |
561c6897 | 438 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
439 | struct lttng_event_exclusion *exclusion, |
440 | bool internal_event) | |
97ee3a89 DG |
441 | { |
442 | struct ltt_ust_event *lue; | |
97ee3a89 | 443 | |
0525e9ae DG |
444 | assert(ev); |
445 | ||
ad11a1d3 PP |
446 | if (exclusion && validate_exclusion(exclusion)) { |
447 | goto error; | |
448 | } | |
449 | ||
37357452 | 450 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 451 | if (lue == NULL) { |
ba7f0ae5 | 452 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
453 | goto error; |
454 | } | |
455 | ||
88f06f15 JG |
456 | lue->internal = internal_event; |
457 | ||
97ee3a89 DG |
458 | switch (ev->type) { |
459 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 460 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
461 | break; |
462 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 463 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
464 | break; |
465 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 466 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
467 | break; |
468 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 469 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
470 | break; |
471 | default: | |
472 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 473 | goto error_free_event; |
97ee3a89 DG |
474 | } |
475 | ||
476 | /* Copy event name */ | |
44d3bd01 DG |
477 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
478 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 479 | |
0cda4f28 | 480 | switch (ev->loglevel_type) { |
8005f29a MD |
481 | case LTTNG_EVENT_LOGLEVEL_ALL: |
482 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 483 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 484 | break; |
8005f29a MD |
485 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
486 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 487 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
488 | break; |
489 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
490 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 491 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
492 | break; |
493 | default: | |
4431494b | 494 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
495 | goto error_free_event; |
496 | } | |
497 | ||
025faf73 | 498 | /* Same layout. */ |
6b453b5e | 499 | lue->filter_expression = filter_expression; |
51755dc8 JG |
500 | lue->filter = filter; |
501 | lue->exclusion = exclusion; | |
0cda4f28 | 502 | |
f6a9efaa | 503 | /* Init node */ |
bec39940 | 504 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 505 | |
300b8fd5 MD |
506 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
507 | lue->attr.name, lue->attr.loglevel_type, | |
508 | lue->attr.loglevel); | |
284d8f55 | 509 | |
97ee3a89 DG |
510 | return lue; |
511 | ||
44844c29 MD |
512 | error_free_event: |
513 | free(lue); | |
97ee3a89 | 514 | error: |
49d21f93 MD |
515 | free(filter_expression); |
516 | free(filter); | |
517 | free(exclusion); | |
97ee3a89 DG |
518 | return NULL; |
519 | } | |
520 | ||
aa3514e9 | 521 | static |
bdf64013 JG |
522 | int trace_ust_context_type_event_to_ust( |
523 | enum lttng_event_context_type type) | |
55cc08a6 | 524 | { |
aa3514e9 | 525 | int utype; |
0525e9ae | 526 | |
aa3514e9 | 527 | switch (type) { |
9197c5c4 MD |
528 | case LTTNG_EVENT_CONTEXT_VTID: |
529 | utype = LTTNG_UST_CONTEXT_VTID; | |
530 | break; | |
531 | case LTTNG_EVENT_CONTEXT_VPID: | |
532 | utype = LTTNG_UST_CONTEXT_VPID; | |
533 | break; | |
534 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
535 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
536 | break; | |
537 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
538 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
539 | break; | |
7c612c2e WP |
540 | case LTTNG_EVENT_CONTEXT_IP: |
541 | utype = LTTNG_UST_CONTEXT_IP; | |
542 | break; | |
aa3514e9 | 543 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: |
354e561b MD |
544 | if (!ustctl_has_perf_counters()) { |
545 | utype = -1; | |
546 | WARN("Perf counters not implemented in UST"); | |
547 | } else { | |
548 | utype = LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER; | |
549 | } | |
aa3514e9 | 550 | break; |
bdf64013 JG |
551 | case LTTNG_EVENT_CONTEXT_APP_CONTEXT: |
552 | utype = LTTNG_UST_CONTEXT_APP_CONTEXT; | |
553 | break; | |
9197c5c4 | 554 | default: |
aa3514e9 MD |
555 | utype = -1; |
556 | break; | |
557 | } | |
558 | return utype; | |
559 | } | |
560 | ||
561 | /* | |
562 | * Return 1 if contexts match, 0 otherwise. | |
563 | */ | |
564 | int trace_ust_match_context(struct ltt_ust_context *uctx, | |
565 | struct lttng_event_context *ctx) | |
566 | { | |
567 | int utype; | |
568 | ||
569 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
570 | if (utype < 0) { | |
571 | return 0; | |
572 | } | |
573 | if (uctx->ctx.ctx != utype) { | |
574 | return 0; | |
575 | } | |
576 | switch (utype) { | |
577 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
578 | if (uctx->ctx.u.perf_counter.type | |
579 | != ctx->u.perf_counter.type) { | |
580 | return 0; | |
581 | } | |
582 | if (uctx->ctx.u.perf_counter.config | |
583 | != ctx->u.perf_counter.config) { | |
584 | return 0; | |
585 | } | |
586 | if (strncmp(uctx->ctx.u.perf_counter.name, | |
587 | ctx->u.perf_counter.name, | |
588 | LTTNG_UST_SYM_NAME_LEN)) { | |
589 | return 0; | |
590 | } | |
591 | break; | |
54fb33cf JG |
592 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
593 | assert(uctx->ctx.u.app_ctx.provider_name); | |
594 | assert(uctx->ctx.u.app_ctx.ctx_name); | |
595 | if (strcmp(uctx->ctx.u.app_ctx.provider_name, | |
596 | ctx->u.app_ctx.provider_name) || | |
597 | strcmp(uctx->ctx.u.app_ctx.ctx_name, | |
598 | ctx->u.app_ctx.ctx_name)) { | |
599 | return 0; | |
600 | } | |
aa3514e9 MD |
601 | default: |
602 | break; | |
603 | ||
604 | } | |
605 | return 1; | |
606 | } | |
607 | ||
608 | /* | |
609 | * Allocate and initialize an UST context. | |
610 | * | |
611 | * Return pointer to structure or NULL. | |
612 | */ | |
613 | struct ltt_ust_context *trace_ust_create_context( | |
614 | struct lttng_event_context *ctx) | |
615 | { | |
bdf64013 | 616 | struct ltt_ust_context *uctx = NULL; |
aa3514e9 MD |
617 | int utype; |
618 | ||
619 | assert(ctx); | |
620 | ||
621 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
622 | if (utype < 0) { | |
1cf992b8 | 623 | ERR("Invalid UST context"); |
bdf64013 | 624 | goto end; |
9197c5c4 | 625 | } |
55cc08a6 DG |
626 | |
627 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
bdf64013 | 628 | if (!uctx) { |
55cc08a6 | 629 | PERROR("zmalloc ltt_ust_context"); |
bdf64013 | 630 | goto end; |
55cc08a6 DG |
631 | } |
632 | ||
aa3514e9 MD |
633 | uctx->ctx.ctx = (enum lttng_ust_context_type) utype; |
634 | switch (utype) { | |
635 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
636 | uctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; | |
637 | uctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
638 | strncpy(uctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
639 | LTTNG_UST_SYM_NAME_LEN); | |
640 | uctx->ctx.u.perf_counter.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
641 | break; | |
bdf64013 JG |
642 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
643 | { | |
644 | char *provider_name = NULL, *ctx_name = NULL; | |
645 | ||
646 | provider_name = strdup(ctx->u.app_ctx.provider_name); | |
647 | if (!provider_name) { | |
648 | goto error; | |
649 | } | |
650 | uctx->ctx.u.app_ctx.provider_name = provider_name; | |
651 | ||
652 | ctx_name = strdup(ctx->u.app_ctx.ctx_name); | |
653 | if (!ctx_name) { | |
654 | goto error; | |
655 | } | |
656 | uctx->ctx.u.app_ctx.ctx_name = ctx_name; | |
657 | break; | |
658 | } | |
aa3514e9 MD |
659 | default: |
660 | break; | |
661 | } | |
bec39940 | 662 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
bdf64013 | 663 | end: |
55cc08a6 | 664 | return uctx; |
55cc08a6 | 665 | error: |
bdf64013 | 666 | trace_ust_destroy_context(uctx); |
55cc08a6 DG |
667 | return NULL; |
668 | } | |
669 | ||
a9ad0c8f MD |
670 | static |
671 | void destroy_pid_tracker_node_rcu(struct rcu_head *head) | |
672 | { | |
673 | struct ust_pid_tracker_node *tracker_node = | |
674 | caa_container_of(head, struct ust_pid_tracker_node, node.head); | |
675 | free(tracker_node); | |
676 | } | |
677 | ||
678 | static | |
679 | void destroy_pid_tracker_node(struct ust_pid_tracker_node *tracker_node) | |
680 | { | |
681 | ||
682 | call_rcu(&tracker_node->node.head, destroy_pid_tracker_node_rcu); | |
683 | } | |
684 | ||
685 | static | |
686 | int init_pid_tracker(struct ust_pid_tracker *pid_tracker) | |
687 | { | |
688 | int ret = 0; | |
689 | ||
690 | pid_tracker->ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
691 | if (!pid_tracker->ht) { | |
692 | ret = -1; | |
693 | goto end; | |
694 | } | |
695 | ||
696 | end: | |
697 | return ret; | |
698 | } | |
699 | ||
700 | /* | |
701 | * Teardown pid tracker content, but don't free pid_tracker object. | |
702 | */ | |
703 | static | |
704 | void fini_pid_tracker(struct ust_pid_tracker *pid_tracker) | |
705 | { | |
706 | struct ust_pid_tracker_node *tracker_node; | |
707 | struct lttng_ht_iter iter; | |
708 | ||
709 | if (!pid_tracker->ht) { | |
710 | return; | |
711 | } | |
712 | rcu_read_lock(); | |
713 | cds_lfht_for_each_entry(pid_tracker->ht->ht, | |
714 | &iter.iter, tracker_node, node.node) { | |
715 | int ret = lttng_ht_del(pid_tracker->ht, &iter); | |
716 | ||
717 | assert(!ret); | |
718 | destroy_pid_tracker_node(tracker_node); | |
719 | } | |
720 | rcu_read_unlock(); | |
721 | ht_cleanup_push(pid_tracker->ht); | |
722 | pid_tracker->ht = NULL; | |
723 | } | |
724 | ||
725 | static | |
726 | struct ust_pid_tracker_node *pid_tracker_lookup( | |
727 | struct ust_pid_tracker *pid_tracker, int pid, | |
728 | struct lttng_ht_iter *iter) | |
729 | { | |
730 | unsigned long _pid = (unsigned long) pid; | |
731 | struct lttng_ht_node_ulong *node; | |
732 | ||
733 | lttng_ht_lookup(pid_tracker->ht, (void *) _pid, iter); | |
734 | node = lttng_ht_iter_get_node_ulong(iter); | |
735 | if (node) { | |
736 | return caa_container_of(node, struct ust_pid_tracker_node, | |
737 | node); | |
738 | } else { | |
739 | return NULL; | |
740 | } | |
741 | } | |
742 | ||
743 | static | |
744 | int pid_tracker_add_pid(struct ust_pid_tracker *pid_tracker, int pid) | |
745 | { | |
746 | int retval = LTTNG_OK; | |
747 | struct ust_pid_tracker_node *tracker_node; | |
748 | struct lttng_ht_iter iter; | |
749 | ||
750 | if (pid < 0) { | |
751 | retval = LTTNG_ERR_INVALID; | |
752 | goto end; | |
753 | } | |
754 | tracker_node = pid_tracker_lookup(pid_tracker, pid, &iter); | |
755 | if (tracker_node) { | |
756 | /* Already exists. */ | |
b93a4a13 | 757 | retval = LTTNG_ERR_PID_TRACKED; |
a9ad0c8f MD |
758 | goto end; |
759 | } | |
760 | tracker_node = zmalloc(sizeof(*tracker_node)); | |
761 | if (!tracker_node) { | |
762 | retval = LTTNG_ERR_NOMEM; | |
763 | goto end; | |
764 | } | |
765 | lttng_ht_node_init_ulong(&tracker_node->node, (unsigned long) pid); | |
766 | lttng_ht_add_unique_ulong(pid_tracker->ht, &tracker_node->node); | |
767 | end: | |
768 | return retval; | |
769 | } | |
770 | ||
771 | static | |
772 | int pid_tracker_del_pid(struct ust_pid_tracker *pid_tracker, int pid) | |
773 | { | |
774 | int retval = LTTNG_OK, ret; | |
775 | struct ust_pid_tracker_node *tracker_node; | |
776 | struct lttng_ht_iter iter; | |
777 | ||
778 | if (pid < 0) { | |
779 | retval = LTTNG_ERR_INVALID; | |
780 | goto end; | |
781 | } | |
782 | tracker_node = pid_tracker_lookup(pid_tracker, pid, &iter); | |
783 | if (!tracker_node) { | |
784 | /* Not found */ | |
b93a4a13 | 785 | retval = LTTNG_ERR_PID_NOT_TRACKED; |
a9ad0c8f MD |
786 | goto end; |
787 | } | |
788 | ret = lttng_ht_del(pid_tracker->ht, &iter); | |
789 | assert(!ret); | |
790 | ||
791 | destroy_pid_tracker_node(tracker_node); | |
792 | end: | |
793 | return retval; | |
794 | } | |
795 | ||
796 | /* | |
797 | * The session lock is held when calling this function. | |
798 | */ | |
799 | int trace_ust_pid_tracker_lookup(struct ltt_ust_session *session, int pid) | |
800 | { | |
801 | struct lttng_ht_iter iter; | |
802 | ||
803 | if (!session->pid_tracker.ht) { | |
804 | return 1; | |
805 | } | |
806 | if (pid_tracker_lookup(&session->pid_tracker, pid, &iter)) { | |
807 | return 1; | |
808 | } | |
809 | return 0; | |
810 | } | |
811 | ||
812 | /* | |
813 | * Called with the session lock held. | |
814 | */ | |
815 | int trace_ust_track_pid(struct ltt_ust_session *session, int pid) | |
816 | { | |
817 | int retval = LTTNG_OK; | |
818 | ||
819 | if (pid == -1) { | |
820 | /* Track all pids: destroy tracker if exists. */ | |
821 | if (session->pid_tracker.ht) { | |
822 | fini_pid_tracker(&session->pid_tracker); | |
823 | /* Ensure all apps have session. */ | |
824 | ust_app_global_update_all(session); | |
825 | } | |
826 | } else { | |
827 | int ret; | |
828 | ||
829 | if (!session->pid_tracker.ht) { | |
830 | /* Create tracker. */ | |
831 | if (init_pid_tracker(&session->pid_tracker)) { | |
832 | ERR("Error initializing PID tracker"); | |
833 | retval = LTTNG_ERR_NOMEM; | |
834 | goto end; | |
835 | } | |
836 | ret = pid_tracker_add_pid(&session->pid_tracker, pid); | |
837 | if (ret != LTTNG_OK) { | |
838 | retval = ret; | |
839 | fini_pid_tracker(&session->pid_tracker); | |
840 | goto end; | |
841 | } | |
842 | /* Remove all apps from session except pid. */ | |
843 | ust_app_global_update_all(session); | |
844 | } else { | |
845 | struct ust_app *app; | |
846 | ||
847 | ret = pid_tracker_add_pid(&session->pid_tracker, pid); | |
848 | if (ret != LTTNG_OK) { | |
849 | retval = ret; | |
850 | goto end; | |
851 | } | |
852 | /* Add session to application */ | |
853 | app = ust_app_find_by_pid(pid); | |
854 | if (app) { | |
855 | ust_app_global_update(session, app); | |
856 | } | |
857 | } | |
858 | } | |
859 | end: | |
860 | return retval; | |
861 | } | |
862 | ||
863 | /* | |
864 | * Called with the session lock held. | |
865 | */ | |
866 | int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid) | |
867 | { | |
868 | int retval = LTTNG_OK; | |
869 | ||
870 | if (pid == -1) { | |
871 | /* Create empty tracker, replace old tracker. */ | |
872 | struct ust_pid_tracker tmp_tracker; | |
873 | ||
874 | tmp_tracker = session->pid_tracker; | |
875 | if (init_pid_tracker(&session->pid_tracker)) { | |
876 | ERR("Error initializing PID tracker"); | |
877 | retval = LTTNG_ERR_NOMEM; | |
878 | /* Rollback operation. */ | |
879 | session->pid_tracker = tmp_tracker; | |
880 | goto end; | |
881 | } | |
882 | fini_pid_tracker(&tmp_tracker); | |
883 | ||
884 | /* Remove session from all applications */ | |
885 | ust_app_global_update_all(session); | |
886 | } else { | |
887 | int ret; | |
888 | struct ust_app *app; | |
889 | ||
890 | if (!session->pid_tracker.ht) { | |
b894343d JG |
891 | /* No PID being tracked. */ |
892 | retval = LTTNG_ERR_PID_NOT_TRACKED; | |
a9ad0c8f MD |
893 | goto end; |
894 | } | |
895 | /* Remove PID from tracker */ | |
896 | ret = pid_tracker_del_pid(&session->pid_tracker, pid); | |
897 | if (ret != LTTNG_OK) { | |
898 | retval = ret; | |
899 | goto end; | |
900 | } | |
901 | /* Remove session from application. */ | |
902 | app = ust_app_find_by_pid(pid); | |
903 | if (app) { | |
904 | ust_app_global_update(session, app); | |
905 | } | |
906 | } | |
907 | end: | |
908 | return retval; | |
909 | } | |
910 | ||
a5dfbb9d MD |
911 | /* |
912 | * Called with session lock held. | |
913 | */ | |
914 | ssize_t trace_ust_list_tracker_pids(struct ltt_ust_session *session, | |
915 | int32_t **_pids) | |
916 | { | |
917 | struct ust_pid_tracker_node *tracker_node; | |
918 | struct lttng_ht_iter iter; | |
919 | unsigned long count, i = 0; | |
920 | long approx[2]; | |
921 | int32_t *pids; | |
922 | int ret = 0; | |
923 | ||
924 | if (!session->pid_tracker.ht) { | |
925 | /* Tracker disabled. Set first entry to -1. */ | |
926 | pids = zmalloc(sizeof(*pids)); | |
927 | if (!pids) { | |
928 | ret = -1; | |
929 | goto end; | |
930 | } | |
931 | pids[0] = -1; | |
932 | *_pids = pids; | |
933 | return 1; | |
934 | } | |
935 | ||
936 | rcu_read_lock(); | |
937 | cds_lfht_count_nodes(session->pid_tracker.ht->ht, | |
938 | &approx[0], &count, &approx[1]); | |
939 | pids = zmalloc(sizeof(*pids) * count); | |
940 | if (!pids) { | |
941 | ret = -1; | |
942 | goto end; | |
943 | } | |
944 | cds_lfht_for_each_entry(session->pid_tracker.ht->ht, | |
945 | &iter.iter, tracker_node, node.node) { | |
946 | pids[i++] = tracker_node->node.key; | |
947 | } | |
948 | *_pids = pids; | |
949 | ret = count; | |
950 | end: | |
951 | rcu_read_unlock(); | |
952 | return ret; | |
953 | } | |
954 | ||
f6a9efaa DG |
955 | /* |
956 | * RCU safe free context structure. | |
957 | */ | |
958 | static void destroy_context_rcu(struct rcu_head *head) | |
959 | { | |
bec39940 DG |
960 | struct lttng_ht_node_ulong *node = |
961 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
962 | struct ltt_ust_context *ctx = |
963 | caa_container_of(node, struct ltt_ust_context, node); | |
964 | ||
bdf64013 | 965 | trace_ust_destroy_context(ctx); |
f6a9efaa DG |
966 | } |
967 | ||
968 | /* | |
969 | * Cleanup UST context hash table. | |
970 | */ | |
7bd39047 | 971 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
972 | { |
973 | int ret; | |
bec39940 DG |
974 | struct lttng_ht_node_ulong *node; |
975 | struct lttng_ht_iter iter; | |
31746f93 | 976 | struct ltt_ust_context *ctx; |
f6a9efaa | 977 | |
0525e9ae DG |
978 | assert(ht); |
979 | ||
36b588ed | 980 | rcu_read_lock(); |
bec39940 | 981 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
31746f93 DG |
982 | /* Remove from ordered list. */ |
983 | ctx = caa_container_of(node, struct ltt_ust_context, node); | |
984 | cds_list_del(&ctx->list); | |
985 | /* Remove from channel's hash table. */ | |
bec39940 | 986 | ret = lttng_ht_del(ht, &iter); |
f6a9efaa DG |
987 | if (!ret) { |
988 | call_rcu(&node->head, destroy_context_rcu); | |
989 | } | |
f6a9efaa | 990 | } |
36b588ed | 991 | rcu_read_unlock(); |
ed52805d | 992 | |
0b2dc8df | 993 | ht_cleanup_push(ht); |
f6a9efaa DG |
994 | } |
995 | ||
97ee3a89 DG |
996 | /* |
997 | * Cleanup ust event structure. | |
998 | */ | |
999 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
1000 | { | |
0525e9ae DG |
1001 | assert(event); |
1002 | ||
f6a9efaa | 1003 | DBG2("Trace destroy UST event %s", event->attr.name); |
6b453b5e | 1004 | free(event->filter_expression); |
53a80697 | 1005 | free(event->filter); |
40024f8a | 1006 | free(event->exclusion); |
97ee3a89 DG |
1007 | free(event); |
1008 | } | |
1009 | ||
bdf64013 JG |
1010 | /* |
1011 | * Cleanup ust context structure. | |
1012 | */ | |
1013 | void trace_ust_destroy_context(struct ltt_ust_context *ctx) | |
1014 | { | |
1015 | assert(ctx); | |
1016 | ||
1017 | if (ctx->ctx.ctx == LTTNG_UST_CONTEXT_APP_CONTEXT) { | |
1018 | free(ctx->ctx.u.app_ctx.provider_name); | |
1019 | free(ctx->ctx.u.app_ctx.ctx_name); | |
1020 | } | |
1021 | free(ctx); | |
1022 | } | |
1023 | ||
f6a9efaa DG |
1024 | /* |
1025 | * URCU intermediate call to complete destroy event. | |
1026 | */ | |
1027 | static void destroy_event_rcu(struct rcu_head *head) | |
1028 | { | |
bec39940 DG |
1029 | struct lttng_ht_node_str *node = |
1030 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
1031 | struct ltt_ust_event *event = |
1032 | caa_container_of(node, struct ltt_ust_event, node); | |
1033 | ||
1034 | trace_ust_destroy_event(event); | |
1035 | } | |
1036 | ||
284d8f55 DG |
1037 | /* |
1038 | * Cleanup UST events hashtable. | |
1039 | */ | |
7bd39047 | 1040 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
1041 | { |
1042 | int ret; | |
bec39940 DG |
1043 | struct lttng_ht_node_str *node; |
1044 | struct lttng_ht_iter iter; | |
ed52805d | 1045 | |
0525e9ae DG |
1046 | assert(events); |
1047 | ||
36b588ed | 1048 | rcu_read_lock(); |
bec39940 DG |
1049 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
1050 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
1051 | assert(!ret); |
1052 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 1053 | } |
36b588ed | 1054 | rcu_read_unlock(); |
ed52805d | 1055 | |
0b2dc8df | 1056 | ht_cleanup_push(events); |
ed52805d DG |
1057 | } |
1058 | ||
97ee3a89 DG |
1059 | /* |
1060 | * Cleanup ust channel structure. | |
36b588ed MD |
1061 | * |
1062 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 1063 | */ |
36b588ed | 1064 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 1065 | { |
0525e9ae DG |
1066 | assert(channel); |
1067 | ||
f6a9efaa | 1068 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 1069 | |
97ee3a89 | 1070 | free(channel); |
f6a9efaa DG |
1071 | } |
1072 | ||
1073 | /* | |
1074 | * URCU intermediate call to complete destroy channel. | |
1075 | */ | |
1076 | static void destroy_channel_rcu(struct rcu_head *head) | |
1077 | { | |
bec39940 DG |
1078 | struct lttng_ht_node_str *node = |
1079 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
1080 | struct ltt_ust_channel *channel = |
1081 | caa_container_of(node, struct ltt_ust_channel, node); | |
1082 | ||
36b588ed MD |
1083 | _trace_ust_destroy_channel(channel); |
1084 | } | |
1085 | ||
1086 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
1087 | { | |
627cbbe7 MD |
1088 | /* Destroying all events of the channel */ |
1089 | destroy_events(channel->events); | |
1090 | /* Destroying all context of the channel */ | |
1091 | destroy_contexts(channel->ctx); | |
1092 | ||
36b588ed | 1093 | call_rcu(&channel->node.head, destroy_channel_rcu); |
97ee3a89 DG |
1094 | } |
1095 | ||
d5979e4a DG |
1096 | /* |
1097 | * Remove an UST channel from a channel HT. | |
1098 | */ | |
1099 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
1100 | struct ltt_ust_channel *channel) | |
1101 | { | |
1102 | int ret; | |
1103 | struct lttng_ht_iter iter; | |
1104 | ||
1105 | assert(ht); | |
1106 | assert(channel); | |
1107 | ||
1108 | iter.iter.node = &channel->node.node; | |
1109 | ret = lttng_ht_del(ht, &iter); | |
1110 | assert(!ret); | |
1111 | } | |
1112 | ||
97ee3a89 | 1113 | /* |
f6a9efaa | 1114 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 1115 | */ |
bec39940 | 1116 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa | 1117 | { |
bec39940 DG |
1118 | struct lttng_ht_node_str *node; |
1119 | struct lttng_ht_iter iter; | |
f6a9efaa | 1120 | |
0525e9ae DG |
1121 | assert(channels); |
1122 | ||
24d1723f | 1123 | rcu_read_lock(); |
bec39940 | 1124 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
627cbbe7 MD |
1125 | struct ltt_ust_channel *chan = |
1126 | caa_container_of(node, struct ltt_ust_channel, node); | |
1127 | ||
1128 | trace_ust_delete_channel(channels, chan); | |
1129 | trace_ust_destroy_channel(chan); | |
f6a9efaa | 1130 | } |
36b588ed | 1131 | rcu_read_unlock(); |
ed52805d | 1132 | |
0b2dc8df | 1133 | ht_cleanup_push(channels); |
f6a9efaa DG |
1134 | } |
1135 | ||
f6a9efaa DG |
1136 | /* |
1137 | * Cleanup UST global domain. | |
1138 | */ | |
1139 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
1140 | { | |
0525e9ae DG |
1141 | assert(dom); |
1142 | ||
f6a9efaa DG |
1143 | destroy_channels(dom->channels); |
1144 | } | |
97ee3a89 | 1145 | |
f6a9efaa DG |
1146 | /* |
1147 | * Cleanup ust session structure | |
36b588ed MD |
1148 | * |
1149 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
1150 | */ |
1151 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
1152 | { | |
fefd409b | 1153 | struct agent *agt; |
7972aab2 | 1154 | struct buffer_reg_uid *reg, *sreg; |
fefd409b | 1155 | struct lttng_ht_iter iter; |
7972aab2 | 1156 | |
0525e9ae | 1157 | assert(session); |
97ee3a89 | 1158 | |
d9bf3ca4 | 1159 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 1160 | |
f6a9efaa DG |
1161 | /* Cleaning up UST domain */ |
1162 | destroy_domain_global(&session->domain_global); | |
fefd409b | 1163 | |
0c0fcd77 | 1164 | rcu_read_lock(); |
fefd409b | 1165 | cds_lfht_for_each_entry(session->agents->ht, &iter.iter, agt, node.node) { |
d0edf546 JG |
1166 | int ret = lttng_ht_del(session->agents, &iter); |
1167 | ||
1168 | assert(!ret); | |
fefd409b DG |
1169 | agent_destroy(agt); |
1170 | } | |
0c0fcd77 | 1171 | rcu_read_unlock(); |
7972aab2 | 1172 | |
8ada2175 MD |
1173 | ht_cleanup_push(session->agents); |
1174 | ||
7972aab2 DG |
1175 | /* Cleanup UID buffer registry object(s). */ |
1176 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
1177 | lnode) { | |
1178 | cds_list_del(®->lnode); | |
1179 | buffer_reg_uid_remove(reg); | |
1180 | buffer_reg_uid_destroy(reg, session->consumer); | |
1181 | } | |
44d3bd01 | 1182 | |
6addfa37 | 1183 | consumer_output_put(session->consumer); |
3f8e211f | 1184 | |
a9ad0c8f MD |
1185 | fini_pid_tracker(&session->pid_tracker); |
1186 | ||
97ee3a89 DG |
1187 | free(session); |
1188 | } |