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; |
82b4ebce JG |
359 | luc->monitor_timer_interval = ((struct lttng_channel_extended *) |
360 | chan->attr.extended.ptr)->monitor_timer_interval; | |
491d1539 MD |
361 | luc->attr.u.s.blocking_timeout = ((struct lttng_channel_extended *) |
362 | chan->attr.extended.ptr)->blocking_timeout; | |
44d3bd01 DG |
363 | |
364 | /* Translate to UST output enum */ | |
365 | switch (luc->attr.output) { | |
366 | default: | |
367 | luc->attr.output = LTTNG_UST_MMAP; | |
368 | break; | |
97ee3a89 | 369 | } |
97ee3a89 | 370 | |
85076754 MD |
371 | /* |
372 | * If we receive an empty string for channel name, it means the | |
373 | * default channel name is requested. | |
374 | */ | |
375 | if (chan->name[0] == '\0') { | |
376 | strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name)); | |
377 | } else { | |
378 | /* Copy channel name */ | |
379 | strncpy(luc->name, chan->name, sizeof(luc->name)); | |
380 | } | |
97ee3a89 DG |
381 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
382 | ||
f6a9efaa | 383 | /* Init node */ |
bec39940 | 384 | lttng_ht_node_init_str(&luc->node, luc->name); |
31746f93 DG |
385 | CDS_INIT_LIST_HEAD(&luc->ctx_list); |
386 | ||
f6a9efaa | 387 | /* Alloc hash tables */ |
bec39940 DG |
388 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
389 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 390 | |
1624d5b7 JD |
391 | /* On-disk circular buffer parameters */ |
392 | luc->tracefile_size = chan->attr.tracefile_size; | |
393 | luc->tracefile_count = chan->attr.tracefile_count; | |
394 | ||
f6a9efaa DG |
395 | DBG2("Trace UST channel %s created", luc->name); |
396 | ||
97ee3a89 | 397 | error: |
7972aab2 | 398 | return luc; |
97ee3a89 DG |
399 | } |
400 | ||
ad11a1d3 PP |
401 | /* |
402 | * Validates an exclusion list. | |
403 | * | |
404 | * Returns 0 if valid, negative value if invalid. | |
405 | */ | |
406 | static int validate_exclusion(struct lttng_event_exclusion *exclusion) | |
407 | { | |
408 | size_t i; | |
409 | int ret = 0; | |
410 | ||
411 | assert(exclusion); | |
412 | ||
413 | for (i = 0; i < exclusion->count; ++i) { | |
414 | size_t j; | |
415 | const char *name_a = | |
416 | LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
417 | ||
418 | for (j = 0; j < i; ++j) { | |
419 | const char *name_b = | |
420 | LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, j); | |
421 | ||
422 | if (!strncmp(name_a, name_b, LTTNG_SYMBOL_NAME_LEN)) { | |
423 | /* Match! */ | |
424 | ret = -1; | |
425 | goto end; | |
426 | } | |
427 | } | |
428 | } | |
429 | ||
430 | end: | |
431 | return ret; | |
432 | } | |
433 | ||
97ee3a89 DG |
434 | /* |
435 | * Allocate and initialize a ust event. Set name and event type. | |
49d21f93 | 436 | * We own filter_expression, filter, and exclusion. |
97ee3a89 DG |
437 | * |
438 | * Return pointer to structure or NULL. | |
439 | */ | |
025faf73 | 440 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
6b453b5e | 441 | char *filter_expression, |
561c6897 | 442 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
443 | struct lttng_event_exclusion *exclusion, |
444 | bool internal_event) | |
97ee3a89 DG |
445 | { |
446 | struct ltt_ust_event *lue; | |
97ee3a89 | 447 | |
0525e9ae DG |
448 | assert(ev); |
449 | ||
ad11a1d3 PP |
450 | if (exclusion && validate_exclusion(exclusion)) { |
451 | goto error; | |
452 | } | |
453 | ||
37357452 | 454 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 455 | if (lue == NULL) { |
ba7f0ae5 | 456 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
457 | goto error; |
458 | } | |
459 | ||
88f06f15 JG |
460 | lue->internal = internal_event; |
461 | ||
97ee3a89 DG |
462 | switch (ev->type) { |
463 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 464 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
465 | break; |
466 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 467 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
468 | break; |
469 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 470 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
471 | break; |
472 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 473 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
474 | break; |
475 | default: | |
476 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 477 | goto error_free_event; |
97ee3a89 DG |
478 | } |
479 | ||
480 | /* Copy event name */ | |
44d3bd01 DG |
481 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
482 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 483 | |
0cda4f28 | 484 | switch (ev->loglevel_type) { |
8005f29a MD |
485 | case LTTNG_EVENT_LOGLEVEL_ALL: |
486 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 487 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 488 | break; |
8005f29a MD |
489 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
490 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 491 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
492 | break; |
493 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
494 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 495 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
496 | break; |
497 | default: | |
4431494b | 498 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
499 | goto error_free_event; |
500 | } | |
501 | ||
025faf73 | 502 | /* Same layout. */ |
6b453b5e | 503 | lue->filter_expression = filter_expression; |
51755dc8 JG |
504 | lue->filter = filter; |
505 | lue->exclusion = exclusion; | |
0cda4f28 | 506 | |
f6a9efaa | 507 | /* Init node */ |
bec39940 | 508 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 509 | |
300b8fd5 MD |
510 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
511 | lue->attr.name, lue->attr.loglevel_type, | |
512 | lue->attr.loglevel); | |
284d8f55 | 513 | |
97ee3a89 DG |
514 | return lue; |
515 | ||
44844c29 MD |
516 | error_free_event: |
517 | free(lue); | |
97ee3a89 | 518 | error: |
49d21f93 MD |
519 | free(filter_expression); |
520 | free(filter); | |
521 | free(exclusion); | |
97ee3a89 DG |
522 | return NULL; |
523 | } | |
524 | ||
aa3514e9 | 525 | static |
bdf64013 JG |
526 | int trace_ust_context_type_event_to_ust( |
527 | enum lttng_event_context_type type) | |
55cc08a6 | 528 | { |
aa3514e9 | 529 | int utype; |
0525e9ae | 530 | |
aa3514e9 | 531 | switch (type) { |
9197c5c4 MD |
532 | case LTTNG_EVENT_CONTEXT_VTID: |
533 | utype = LTTNG_UST_CONTEXT_VTID; | |
534 | break; | |
535 | case LTTNG_EVENT_CONTEXT_VPID: | |
536 | utype = LTTNG_UST_CONTEXT_VPID; | |
537 | break; | |
538 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
539 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
540 | break; | |
541 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
542 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
543 | break; | |
7c612c2e WP |
544 | case LTTNG_EVENT_CONTEXT_IP: |
545 | utype = LTTNG_UST_CONTEXT_IP; | |
546 | break; | |
aa3514e9 | 547 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: |
354e561b MD |
548 | if (!ustctl_has_perf_counters()) { |
549 | utype = -1; | |
550 | WARN("Perf counters not implemented in UST"); | |
551 | } else { | |
552 | utype = LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER; | |
553 | } | |
aa3514e9 | 554 | break; |
bdf64013 JG |
555 | case LTTNG_EVENT_CONTEXT_APP_CONTEXT: |
556 | utype = LTTNG_UST_CONTEXT_APP_CONTEXT; | |
557 | break; | |
9197c5c4 | 558 | default: |
aa3514e9 MD |
559 | utype = -1; |
560 | break; | |
561 | } | |
562 | return utype; | |
563 | } | |
564 | ||
565 | /* | |
566 | * Return 1 if contexts match, 0 otherwise. | |
567 | */ | |
568 | int trace_ust_match_context(struct ltt_ust_context *uctx, | |
569 | struct lttng_event_context *ctx) | |
570 | { | |
571 | int utype; | |
572 | ||
573 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
574 | if (utype < 0) { | |
575 | return 0; | |
576 | } | |
577 | if (uctx->ctx.ctx != utype) { | |
578 | return 0; | |
579 | } | |
580 | switch (utype) { | |
581 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
582 | if (uctx->ctx.u.perf_counter.type | |
583 | != ctx->u.perf_counter.type) { | |
584 | return 0; | |
585 | } | |
586 | if (uctx->ctx.u.perf_counter.config | |
587 | != ctx->u.perf_counter.config) { | |
588 | return 0; | |
589 | } | |
590 | if (strncmp(uctx->ctx.u.perf_counter.name, | |
591 | ctx->u.perf_counter.name, | |
592 | LTTNG_UST_SYM_NAME_LEN)) { | |
593 | return 0; | |
594 | } | |
595 | break; | |
54fb33cf JG |
596 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
597 | assert(uctx->ctx.u.app_ctx.provider_name); | |
598 | assert(uctx->ctx.u.app_ctx.ctx_name); | |
599 | if (strcmp(uctx->ctx.u.app_ctx.provider_name, | |
600 | ctx->u.app_ctx.provider_name) || | |
601 | strcmp(uctx->ctx.u.app_ctx.ctx_name, | |
602 | ctx->u.app_ctx.ctx_name)) { | |
603 | return 0; | |
604 | } | |
aa3514e9 MD |
605 | default: |
606 | break; | |
607 | ||
608 | } | |
609 | return 1; | |
610 | } | |
611 | ||
612 | /* | |
613 | * Allocate and initialize an UST context. | |
614 | * | |
615 | * Return pointer to structure or NULL. | |
616 | */ | |
617 | struct ltt_ust_context *trace_ust_create_context( | |
618 | struct lttng_event_context *ctx) | |
619 | { | |
bdf64013 | 620 | struct ltt_ust_context *uctx = NULL; |
aa3514e9 MD |
621 | int utype; |
622 | ||
623 | assert(ctx); | |
624 | ||
625 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
626 | if (utype < 0) { | |
1cf992b8 | 627 | ERR("Invalid UST context"); |
bdf64013 | 628 | goto end; |
9197c5c4 | 629 | } |
55cc08a6 DG |
630 | |
631 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
bdf64013 | 632 | if (!uctx) { |
55cc08a6 | 633 | PERROR("zmalloc ltt_ust_context"); |
bdf64013 | 634 | goto end; |
55cc08a6 DG |
635 | } |
636 | ||
aa3514e9 MD |
637 | uctx->ctx.ctx = (enum lttng_ust_context_type) utype; |
638 | switch (utype) { | |
639 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
640 | uctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; | |
641 | uctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
642 | strncpy(uctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
643 | LTTNG_UST_SYM_NAME_LEN); | |
644 | uctx->ctx.u.perf_counter.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
645 | break; | |
bdf64013 JG |
646 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
647 | { | |
648 | char *provider_name = NULL, *ctx_name = NULL; | |
649 | ||
650 | provider_name = strdup(ctx->u.app_ctx.provider_name); | |
651 | if (!provider_name) { | |
652 | goto error; | |
653 | } | |
654 | uctx->ctx.u.app_ctx.provider_name = provider_name; | |
655 | ||
656 | ctx_name = strdup(ctx->u.app_ctx.ctx_name); | |
657 | if (!ctx_name) { | |
658 | goto error; | |
659 | } | |
660 | uctx->ctx.u.app_ctx.ctx_name = ctx_name; | |
661 | break; | |
662 | } | |
aa3514e9 MD |
663 | default: |
664 | break; | |
665 | } | |
bec39940 | 666 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
bdf64013 | 667 | end: |
55cc08a6 | 668 | return uctx; |
55cc08a6 | 669 | error: |
bdf64013 | 670 | trace_ust_destroy_context(uctx); |
55cc08a6 DG |
671 | return NULL; |
672 | } | |
673 | ||
a9ad0c8f MD |
674 | static |
675 | void destroy_pid_tracker_node_rcu(struct rcu_head *head) | |
676 | { | |
677 | struct ust_pid_tracker_node *tracker_node = | |
678 | caa_container_of(head, struct ust_pid_tracker_node, node.head); | |
679 | free(tracker_node); | |
680 | } | |
681 | ||
682 | static | |
683 | void destroy_pid_tracker_node(struct ust_pid_tracker_node *tracker_node) | |
684 | { | |
685 | ||
686 | call_rcu(&tracker_node->node.head, destroy_pid_tracker_node_rcu); | |
687 | } | |
688 | ||
689 | static | |
690 | int init_pid_tracker(struct ust_pid_tracker *pid_tracker) | |
691 | { | |
692 | int ret = 0; | |
693 | ||
694 | pid_tracker->ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
695 | if (!pid_tracker->ht) { | |
696 | ret = -1; | |
697 | goto end; | |
698 | } | |
699 | ||
700 | end: | |
701 | return ret; | |
702 | } | |
703 | ||
704 | /* | |
705 | * Teardown pid tracker content, but don't free pid_tracker object. | |
706 | */ | |
707 | static | |
708 | void fini_pid_tracker(struct ust_pid_tracker *pid_tracker) | |
709 | { | |
710 | struct ust_pid_tracker_node *tracker_node; | |
711 | struct lttng_ht_iter iter; | |
712 | ||
713 | if (!pid_tracker->ht) { | |
714 | return; | |
715 | } | |
716 | rcu_read_lock(); | |
717 | cds_lfht_for_each_entry(pid_tracker->ht->ht, | |
718 | &iter.iter, tracker_node, node.node) { | |
719 | int ret = lttng_ht_del(pid_tracker->ht, &iter); | |
720 | ||
721 | assert(!ret); | |
722 | destroy_pid_tracker_node(tracker_node); | |
723 | } | |
724 | rcu_read_unlock(); | |
725 | ht_cleanup_push(pid_tracker->ht); | |
726 | pid_tracker->ht = NULL; | |
727 | } | |
728 | ||
729 | static | |
730 | struct ust_pid_tracker_node *pid_tracker_lookup( | |
731 | struct ust_pid_tracker *pid_tracker, int pid, | |
732 | struct lttng_ht_iter *iter) | |
733 | { | |
734 | unsigned long _pid = (unsigned long) pid; | |
735 | struct lttng_ht_node_ulong *node; | |
736 | ||
737 | lttng_ht_lookup(pid_tracker->ht, (void *) _pid, iter); | |
738 | node = lttng_ht_iter_get_node_ulong(iter); | |
739 | if (node) { | |
740 | return caa_container_of(node, struct ust_pid_tracker_node, | |
741 | node); | |
742 | } else { | |
743 | return NULL; | |
744 | } | |
745 | } | |
746 | ||
747 | static | |
748 | int pid_tracker_add_pid(struct ust_pid_tracker *pid_tracker, int pid) | |
749 | { | |
750 | int retval = LTTNG_OK; | |
751 | struct ust_pid_tracker_node *tracker_node; | |
752 | struct lttng_ht_iter iter; | |
753 | ||
754 | if (pid < 0) { | |
755 | retval = LTTNG_ERR_INVALID; | |
756 | goto end; | |
757 | } | |
758 | tracker_node = pid_tracker_lookup(pid_tracker, pid, &iter); | |
759 | if (tracker_node) { | |
760 | /* Already exists. */ | |
b93a4a13 | 761 | retval = LTTNG_ERR_PID_TRACKED; |
a9ad0c8f MD |
762 | goto end; |
763 | } | |
764 | tracker_node = zmalloc(sizeof(*tracker_node)); | |
765 | if (!tracker_node) { | |
766 | retval = LTTNG_ERR_NOMEM; | |
767 | goto end; | |
768 | } | |
769 | lttng_ht_node_init_ulong(&tracker_node->node, (unsigned long) pid); | |
770 | lttng_ht_add_unique_ulong(pid_tracker->ht, &tracker_node->node); | |
771 | end: | |
772 | return retval; | |
773 | } | |
774 | ||
775 | static | |
776 | int pid_tracker_del_pid(struct ust_pid_tracker *pid_tracker, int pid) | |
777 | { | |
778 | int retval = LTTNG_OK, ret; | |
779 | struct ust_pid_tracker_node *tracker_node; | |
780 | struct lttng_ht_iter iter; | |
781 | ||
782 | if (pid < 0) { | |
783 | retval = LTTNG_ERR_INVALID; | |
784 | goto end; | |
785 | } | |
786 | tracker_node = pid_tracker_lookup(pid_tracker, pid, &iter); | |
787 | if (!tracker_node) { | |
788 | /* Not found */ | |
b93a4a13 | 789 | retval = LTTNG_ERR_PID_NOT_TRACKED; |
a9ad0c8f MD |
790 | goto end; |
791 | } | |
792 | ret = lttng_ht_del(pid_tracker->ht, &iter); | |
793 | assert(!ret); | |
794 | ||
795 | destroy_pid_tracker_node(tracker_node); | |
796 | end: | |
797 | return retval; | |
798 | } | |
799 | ||
800 | /* | |
801 | * The session lock is held when calling this function. | |
802 | */ | |
803 | int trace_ust_pid_tracker_lookup(struct ltt_ust_session *session, int pid) | |
804 | { | |
805 | struct lttng_ht_iter iter; | |
806 | ||
807 | if (!session->pid_tracker.ht) { | |
808 | return 1; | |
809 | } | |
810 | if (pid_tracker_lookup(&session->pid_tracker, pid, &iter)) { | |
811 | return 1; | |
812 | } | |
813 | return 0; | |
814 | } | |
815 | ||
816 | /* | |
817 | * Called with the session lock held. | |
818 | */ | |
819 | int trace_ust_track_pid(struct ltt_ust_session *session, int pid) | |
820 | { | |
821 | int retval = LTTNG_OK; | |
822 | ||
823 | if (pid == -1) { | |
824 | /* Track all pids: destroy tracker if exists. */ | |
825 | if (session->pid_tracker.ht) { | |
826 | fini_pid_tracker(&session->pid_tracker); | |
827 | /* Ensure all apps have session. */ | |
828 | ust_app_global_update_all(session); | |
829 | } | |
830 | } else { | |
831 | int ret; | |
832 | ||
833 | if (!session->pid_tracker.ht) { | |
834 | /* Create tracker. */ | |
835 | if (init_pid_tracker(&session->pid_tracker)) { | |
836 | ERR("Error initializing PID tracker"); | |
837 | retval = LTTNG_ERR_NOMEM; | |
838 | goto end; | |
839 | } | |
840 | ret = pid_tracker_add_pid(&session->pid_tracker, pid); | |
841 | if (ret != LTTNG_OK) { | |
842 | retval = ret; | |
843 | fini_pid_tracker(&session->pid_tracker); | |
844 | goto end; | |
845 | } | |
846 | /* Remove all apps from session except pid. */ | |
847 | ust_app_global_update_all(session); | |
848 | } else { | |
849 | struct ust_app *app; | |
850 | ||
851 | ret = pid_tracker_add_pid(&session->pid_tracker, pid); | |
852 | if (ret != LTTNG_OK) { | |
853 | retval = ret; | |
854 | goto end; | |
855 | } | |
856 | /* Add session to application */ | |
857 | app = ust_app_find_by_pid(pid); | |
858 | if (app) { | |
859 | ust_app_global_update(session, app); | |
860 | } | |
861 | } | |
862 | } | |
863 | end: | |
864 | return retval; | |
865 | } | |
866 | ||
867 | /* | |
868 | * Called with the session lock held. | |
869 | */ | |
870 | int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid) | |
871 | { | |
872 | int retval = LTTNG_OK; | |
873 | ||
874 | if (pid == -1) { | |
875 | /* Create empty tracker, replace old tracker. */ | |
876 | struct ust_pid_tracker tmp_tracker; | |
877 | ||
878 | tmp_tracker = session->pid_tracker; | |
879 | if (init_pid_tracker(&session->pid_tracker)) { | |
880 | ERR("Error initializing PID tracker"); | |
881 | retval = LTTNG_ERR_NOMEM; | |
882 | /* Rollback operation. */ | |
883 | session->pid_tracker = tmp_tracker; | |
884 | goto end; | |
885 | } | |
886 | fini_pid_tracker(&tmp_tracker); | |
887 | ||
888 | /* Remove session from all applications */ | |
889 | ust_app_global_update_all(session); | |
890 | } else { | |
891 | int ret; | |
892 | struct ust_app *app; | |
893 | ||
894 | if (!session->pid_tracker.ht) { | |
b894343d JG |
895 | /* No PID being tracked. */ |
896 | retval = LTTNG_ERR_PID_NOT_TRACKED; | |
a9ad0c8f MD |
897 | goto end; |
898 | } | |
899 | /* Remove PID from tracker */ | |
900 | ret = pid_tracker_del_pid(&session->pid_tracker, pid); | |
901 | if (ret != LTTNG_OK) { | |
902 | retval = ret; | |
903 | goto end; | |
904 | } | |
905 | /* Remove session from application. */ | |
906 | app = ust_app_find_by_pid(pid); | |
907 | if (app) { | |
908 | ust_app_global_update(session, app); | |
909 | } | |
910 | } | |
911 | end: | |
912 | return retval; | |
913 | } | |
914 | ||
a5dfbb9d MD |
915 | /* |
916 | * Called with session lock held. | |
917 | */ | |
918 | ssize_t trace_ust_list_tracker_pids(struct ltt_ust_session *session, | |
919 | int32_t **_pids) | |
920 | { | |
921 | struct ust_pid_tracker_node *tracker_node; | |
922 | struct lttng_ht_iter iter; | |
923 | unsigned long count, i = 0; | |
924 | long approx[2]; | |
925 | int32_t *pids; | |
926 | int ret = 0; | |
927 | ||
928 | if (!session->pid_tracker.ht) { | |
929 | /* Tracker disabled. Set first entry to -1. */ | |
930 | pids = zmalloc(sizeof(*pids)); | |
931 | if (!pids) { | |
932 | ret = -1; | |
933 | goto end; | |
934 | } | |
935 | pids[0] = -1; | |
936 | *_pids = pids; | |
937 | return 1; | |
938 | } | |
939 | ||
940 | rcu_read_lock(); | |
941 | cds_lfht_count_nodes(session->pid_tracker.ht->ht, | |
942 | &approx[0], &count, &approx[1]); | |
943 | pids = zmalloc(sizeof(*pids) * count); | |
944 | if (!pids) { | |
945 | ret = -1; | |
946 | goto end; | |
947 | } | |
948 | cds_lfht_for_each_entry(session->pid_tracker.ht->ht, | |
949 | &iter.iter, tracker_node, node.node) { | |
950 | pids[i++] = tracker_node->node.key; | |
951 | } | |
952 | *_pids = pids; | |
953 | ret = count; | |
954 | end: | |
955 | rcu_read_unlock(); | |
956 | return ret; | |
957 | } | |
958 | ||
f6a9efaa DG |
959 | /* |
960 | * RCU safe free context structure. | |
961 | */ | |
962 | static void destroy_context_rcu(struct rcu_head *head) | |
963 | { | |
bec39940 DG |
964 | struct lttng_ht_node_ulong *node = |
965 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
966 | struct ltt_ust_context *ctx = |
967 | caa_container_of(node, struct ltt_ust_context, node); | |
968 | ||
bdf64013 | 969 | trace_ust_destroy_context(ctx); |
f6a9efaa DG |
970 | } |
971 | ||
972 | /* | |
973 | * Cleanup UST context hash table. | |
974 | */ | |
7bd39047 | 975 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
976 | { |
977 | int ret; | |
bec39940 DG |
978 | struct lttng_ht_node_ulong *node; |
979 | struct lttng_ht_iter iter; | |
31746f93 | 980 | struct ltt_ust_context *ctx; |
f6a9efaa | 981 | |
0525e9ae DG |
982 | assert(ht); |
983 | ||
36b588ed | 984 | rcu_read_lock(); |
bec39940 | 985 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
31746f93 DG |
986 | /* Remove from ordered list. */ |
987 | ctx = caa_container_of(node, struct ltt_ust_context, node); | |
988 | cds_list_del(&ctx->list); | |
989 | /* Remove from channel's hash table. */ | |
bec39940 | 990 | ret = lttng_ht_del(ht, &iter); |
f6a9efaa DG |
991 | if (!ret) { |
992 | call_rcu(&node->head, destroy_context_rcu); | |
993 | } | |
f6a9efaa | 994 | } |
36b588ed | 995 | rcu_read_unlock(); |
ed52805d | 996 | |
0b2dc8df | 997 | ht_cleanup_push(ht); |
f6a9efaa DG |
998 | } |
999 | ||
97ee3a89 DG |
1000 | /* |
1001 | * Cleanup ust event structure. | |
1002 | */ | |
1003 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
1004 | { | |
0525e9ae DG |
1005 | assert(event); |
1006 | ||
f6a9efaa | 1007 | DBG2("Trace destroy UST event %s", event->attr.name); |
6b453b5e | 1008 | free(event->filter_expression); |
53a80697 | 1009 | free(event->filter); |
40024f8a | 1010 | free(event->exclusion); |
97ee3a89 DG |
1011 | free(event); |
1012 | } | |
1013 | ||
bdf64013 JG |
1014 | /* |
1015 | * Cleanup ust context structure. | |
1016 | */ | |
1017 | void trace_ust_destroy_context(struct ltt_ust_context *ctx) | |
1018 | { | |
1019 | assert(ctx); | |
1020 | ||
1021 | if (ctx->ctx.ctx == LTTNG_UST_CONTEXT_APP_CONTEXT) { | |
1022 | free(ctx->ctx.u.app_ctx.provider_name); | |
1023 | free(ctx->ctx.u.app_ctx.ctx_name); | |
1024 | } | |
1025 | free(ctx); | |
1026 | } | |
1027 | ||
f6a9efaa DG |
1028 | /* |
1029 | * URCU intermediate call to complete destroy event. | |
1030 | */ | |
1031 | static void destroy_event_rcu(struct rcu_head *head) | |
1032 | { | |
bec39940 DG |
1033 | struct lttng_ht_node_str *node = |
1034 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
1035 | struct ltt_ust_event *event = |
1036 | caa_container_of(node, struct ltt_ust_event, node); | |
1037 | ||
1038 | trace_ust_destroy_event(event); | |
1039 | } | |
1040 | ||
284d8f55 DG |
1041 | /* |
1042 | * Cleanup UST events hashtable. | |
1043 | */ | |
7bd39047 | 1044 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
1045 | { |
1046 | int ret; | |
bec39940 DG |
1047 | struct lttng_ht_node_str *node; |
1048 | struct lttng_ht_iter iter; | |
ed52805d | 1049 | |
0525e9ae DG |
1050 | assert(events); |
1051 | ||
36b588ed | 1052 | rcu_read_lock(); |
bec39940 DG |
1053 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
1054 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
1055 | assert(!ret); |
1056 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 1057 | } |
36b588ed | 1058 | rcu_read_unlock(); |
ed52805d | 1059 | |
0b2dc8df | 1060 | ht_cleanup_push(events); |
ed52805d DG |
1061 | } |
1062 | ||
97ee3a89 DG |
1063 | /* |
1064 | * Cleanup ust channel structure. | |
36b588ed MD |
1065 | * |
1066 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 1067 | */ |
36b588ed | 1068 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 1069 | { |
0525e9ae DG |
1070 | assert(channel); |
1071 | ||
f6a9efaa | 1072 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 1073 | |
97ee3a89 | 1074 | free(channel); |
f6a9efaa DG |
1075 | } |
1076 | ||
1077 | /* | |
1078 | * URCU intermediate call to complete destroy channel. | |
1079 | */ | |
1080 | static void destroy_channel_rcu(struct rcu_head *head) | |
1081 | { | |
bec39940 DG |
1082 | struct lttng_ht_node_str *node = |
1083 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
1084 | struct ltt_ust_channel *channel = |
1085 | caa_container_of(node, struct ltt_ust_channel, node); | |
1086 | ||
36b588ed MD |
1087 | _trace_ust_destroy_channel(channel); |
1088 | } | |
1089 | ||
1090 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
1091 | { | |
627cbbe7 MD |
1092 | /* Destroying all events of the channel */ |
1093 | destroy_events(channel->events); | |
1094 | /* Destroying all context of the channel */ | |
1095 | destroy_contexts(channel->ctx); | |
1096 | ||
36b588ed | 1097 | call_rcu(&channel->node.head, destroy_channel_rcu); |
97ee3a89 DG |
1098 | } |
1099 | ||
d5979e4a DG |
1100 | /* |
1101 | * Remove an UST channel from a channel HT. | |
1102 | */ | |
1103 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
1104 | struct ltt_ust_channel *channel) | |
1105 | { | |
1106 | int ret; | |
1107 | struct lttng_ht_iter iter; | |
1108 | ||
1109 | assert(ht); | |
1110 | assert(channel); | |
1111 | ||
1112 | iter.iter.node = &channel->node.node; | |
1113 | ret = lttng_ht_del(ht, &iter); | |
1114 | assert(!ret); | |
1115 | } | |
1116 | ||
97ee3a89 | 1117 | /* |
f6a9efaa | 1118 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 1119 | */ |
bec39940 | 1120 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa | 1121 | { |
bec39940 DG |
1122 | struct lttng_ht_node_str *node; |
1123 | struct lttng_ht_iter iter; | |
f6a9efaa | 1124 | |
0525e9ae DG |
1125 | assert(channels); |
1126 | ||
24d1723f | 1127 | rcu_read_lock(); |
bec39940 | 1128 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
627cbbe7 MD |
1129 | struct ltt_ust_channel *chan = |
1130 | caa_container_of(node, struct ltt_ust_channel, node); | |
1131 | ||
1132 | trace_ust_delete_channel(channels, chan); | |
1133 | trace_ust_destroy_channel(chan); | |
f6a9efaa | 1134 | } |
36b588ed | 1135 | rcu_read_unlock(); |
ed52805d | 1136 | |
0b2dc8df | 1137 | ht_cleanup_push(channels); |
f6a9efaa DG |
1138 | } |
1139 | ||
f6a9efaa DG |
1140 | /* |
1141 | * Cleanup UST global domain. | |
1142 | */ | |
1143 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
1144 | { | |
0525e9ae DG |
1145 | assert(dom); |
1146 | ||
f6a9efaa DG |
1147 | destroy_channels(dom->channels); |
1148 | } | |
97ee3a89 | 1149 | |
f6a9efaa DG |
1150 | /* |
1151 | * Cleanup ust session structure | |
36b588ed MD |
1152 | * |
1153 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
1154 | */ |
1155 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
1156 | { | |
fefd409b | 1157 | struct agent *agt; |
7972aab2 | 1158 | struct buffer_reg_uid *reg, *sreg; |
fefd409b | 1159 | struct lttng_ht_iter iter; |
7972aab2 | 1160 | |
0525e9ae | 1161 | assert(session); |
97ee3a89 | 1162 | |
d9bf3ca4 | 1163 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 1164 | |
f6a9efaa DG |
1165 | /* Cleaning up UST domain */ |
1166 | destroy_domain_global(&session->domain_global); | |
fefd409b | 1167 | |
0c0fcd77 | 1168 | rcu_read_lock(); |
fefd409b | 1169 | cds_lfht_for_each_entry(session->agents->ht, &iter.iter, agt, node.node) { |
d0edf546 JG |
1170 | int ret = lttng_ht_del(session->agents, &iter); |
1171 | ||
1172 | assert(!ret); | |
fefd409b DG |
1173 | agent_destroy(agt); |
1174 | } | |
0c0fcd77 | 1175 | rcu_read_unlock(); |
7972aab2 | 1176 | |
8ada2175 MD |
1177 | ht_cleanup_push(session->agents); |
1178 | ||
7972aab2 DG |
1179 | /* Cleanup UID buffer registry object(s). */ |
1180 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
1181 | lnode) { | |
1182 | cds_list_del(®->lnode); | |
1183 | buffer_reg_uid_remove(reg); | |
1184 | buffer_reg_uid_destroy(reg, session->consumer); | |
1185 | } | |
44d3bd01 | 1186 | |
6addfa37 | 1187 | consumer_output_put(session->consumer); |
3f8e211f | 1188 | |
a9ad0c8f MD |
1189 | fini_pid_tracker(&session->pid_tracker); |
1190 | ||
97ee3a89 DG |
1191 | free(session); |
1192 | } |