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> | |
82b69413 | 28 | #include <common/trace-chunk.h> |
97ee3a89 | 29 | |
7972aab2 | 30 | #include "buffer-registry.h" |
97ee3a89 | 31 | #include "trace-ust.h" |
0b2dc8df | 32 | #include "utils.h" |
a9ad0c8f | 33 | #include "ust-app.h" |
7c1d2758 | 34 | #include "agent.h" |
97ee3a89 | 35 | |
025faf73 DG |
36 | /* |
37 | * Match function for the events hash table lookup. | |
38 | * | |
39 | * Matches by name only. Used by the disable command. | |
40 | */ | |
18eace3b DG |
41 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
42 | const void *_key) | |
43 | { | |
44 | struct ltt_ust_event *event; | |
45 | const char *name; | |
46 | ||
47 | assert(node); | |
48 | assert(_key); | |
49 | ||
50 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
51 | name = _key; | |
52 | ||
53 | /* Event name */ | |
54 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
55 | goto no_match; | |
56 | } | |
57 | ||
025faf73 | 58 | /* Match */ |
18eace3b DG |
59 | return 1; |
60 | ||
61 | no_match: | |
62 | return 0; | |
63 | } | |
64 | ||
025faf73 DG |
65 | /* |
66 | * Match function for the hash table lookup. | |
67 | * | |
68 | * It matches an ust event based on three attributes which are the event name, | |
69 | * the filter bytecode and the loglevel. | |
70 | */ | |
18eace3b DG |
71 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
72 | { | |
73 | struct ltt_ust_event *event; | |
74 | const struct ltt_ust_ht_key *key; | |
2106efa0 | 75 | int ev_loglevel_value; |
19a97244 | 76 | int ll_match; |
18eace3b DG |
77 | |
78 | assert(node); | |
79 | assert(_key); | |
80 | ||
81 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
82 | key = _key; | |
2106efa0 | 83 | ev_loglevel_value = event->attr.loglevel; |
18eace3b | 84 | |
f19e9f8b | 85 | /* Match the 4 elements of the key: name, filter, loglevel, exclusions. */ |
18eace3b DG |
86 | |
87 | /* Event name */ | |
88 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
89 | goto no_match; |
90 | } | |
91 | ||
b953b8cd | 92 | /* Event loglevel value and type. */ |
19a97244 PP |
93 | ll_match = loglevels_match(event->attr.loglevel_type, |
94 | ev_loglevel_value, key->loglevel_type, | |
95 | key->loglevel_value, LTTNG_UST_LOGLEVEL_ALL); | |
96 | ||
97 | if (!ll_match) { | |
b953b8cd | 98 | goto no_match; |
18eace3b DG |
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) { | |
a5b7e00c PP |
121 | size_t i; |
122 | ||
123 | /* Check exclusion counts first. */ | |
124 | if (event->exclusion->count != key->exclusion->count) { | |
f19e9f8b JI |
125 | goto no_match; |
126 | } | |
a5b7e00c PP |
127 | |
128 | /* Compare names individually. */ | |
129 | for (i = 0; i < event->exclusion->count; ++i) { | |
130 | size_t j; | |
131 | bool found = false; | |
132 | const char *name_ev = | |
133 | LTTNG_EVENT_EXCLUSION_NAME_AT( | |
134 | event->exclusion, i); | |
135 | ||
136 | /* | |
137 | * Compare this exclusion name to all the key's | |
138 | * exclusion names. | |
139 | */ | |
140 | for (j = 0; j < key->exclusion->count; ++j) { | |
141 | const char *name_key = | |
142 | LTTNG_EVENT_EXCLUSION_NAME_AT( | |
143 | key->exclusion, j); | |
144 | ||
145 | if (!strncmp(name_ev, name_key, | |
146 | LTTNG_SYMBOL_NAME_LEN)) { | |
147 | /* Names match! */ | |
148 | found = true; | |
149 | break; | |
150 | } | |
151 | } | |
152 | ||
153 | /* | |
154 | * If the current exclusion name was not found amongst | |
155 | * the key's exclusion names, then there's no match. | |
156 | */ | |
157 | if (!found) { | |
158 | goto no_match; | |
159 | } | |
160 | } | |
f19e9f8b | 161 | } |
025faf73 DG |
162 | /* Match. */ |
163 | return 1; | |
18eace3b DG |
164 | |
165 | no_match: | |
166 | return 0; | |
18eace3b DG |
167 | } |
168 | ||
0177d773 | 169 | /* |
2223c96f DG |
170 | * Find the channel in the hashtable and return channel pointer. RCU read side |
171 | * lock MUST be acquired before calling this. | |
0177d773 | 172 | */ |
bec39940 | 173 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
df4f5a87 | 174 | const char *name) |
0177d773 | 175 | { |
bec39940 DG |
176 | struct lttng_ht_node_str *node; |
177 | struct lttng_ht_iter iter; | |
0177d773 | 178 | |
85076754 MD |
179 | /* |
180 | * If we receive an empty string for channel name, it means the | |
181 | * default channel name is requested. | |
182 | */ | |
183 | if (name[0] == '\0') | |
184 | name = DEFAULT_CHANNEL_NAME; | |
185 | ||
bec39940 DG |
186 | lttng_ht_lookup(ht, (void *)name, &iter); |
187 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 188 | if (node == NULL) { |
44d3bd01 DG |
189 | goto error; |
190 | } | |
191 | ||
f6a9efaa | 192 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 193 | |
f6a9efaa | 194 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
195 | |
196 | error: | |
f6a9efaa | 197 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
198 | return NULL; |
199 | } | |
200 | ||
201 | /* | |
2223c96f DG |
202 | * Find the event in the hashtable and return event pointer. RCU read side lock |
203 | * MUST be acquired before calling this. | |
97ee3a89 | 204 | */ |
18eace3b | 205 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
2106efa0 | 206 | char *name, struct lttng_filter_bytecode *filter, |
b953b8cd PP |
207 | enum lttng_ust_loglevel_type loglevel_type, int loglevel_value, |
208 | struct lttng_event_exclusion *exclusion) | |
97ee3a89 | 209 | { |
bec39940 DG |
210 | struct lttng_ht_node_str *node; |
211 | struct lttng_ht_iter iter; | |
18eace3b | 212 | struct ltt_ust_ht_key key; |
97ee3a89 | 213 | |
18eace3b DG |
214 | assert(name); |
215 | assert(ht); | |
216 | ||
217 | key.name = name; | |
218 | key.filter = filter; | |
b953b8cd PP |
219 | key.loglevel_type = loglevel_type; |
220 | key.loglevel_value = loglevel_value; | |
10646003 | 221 | key.exclusion = exclusion; |
18eace3b | 222 | |
18eace3b DG |
223 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
224 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 225 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 226 | if (node == NULL) { |
97ee3a89 DG |
227 | goto error; |
228 | } | |
229 | ||
18eace3b | 230 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
231 | |
232 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
233 | |
234 | error: | |
18eace3b | 235 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
236 | return NULL; |
237 | } | |
238 | ||
fefd409b DG |
239 | /* |
240 | * Lookup an agent in the session agents hash table by domain type and return | |
241 | * the object if found else NULL. | |
4da703ad JG |
242 | * |
243 | * RCU read side lock must be acquired before calling and only released | |
244 | * once the agent is no longer in scope or being used. | |
fefd409b DG |
245 | */ |
246 | struct agent *trace_ust_find_agent(struct ltt_ust_session *session, | |
247 | enum lttng_domain_type domain_type) | |
248 | { | |
249 | struct agent *agt = NULL; | |
250 | struct lttng_ht_node_u64 *node; | |
251 | struct lttng_ht_iter iter; | |
252 | uint64_t key; | |
253 | ||
254 | assert(session); | |
255 | ||
256 | DBG3("Trace ust agent lookup for domain %d", domain_type); | |
257 | ||
258 | key = domain_type; | |
259 | ||
260 | lttng_ht_lookup(session->agents, &key, &iter); | |
261 | node = lttng_ht_iter_get_node_u64(&iter); | |
262 | if (!node) { | |
263 | goto end; | |
264 | } | |
265 | agt = caa_container_of(node, struct agent, node); | |
266 | ||
267 | end: | |
268 | return agt; | |
269 | } | |
270 | ||
97ee3a89 DG |
271 | /* |
272 | * Allocate and initialize a ust session data structure. | |
273 | * | |
274 | * Return pointer to structure or NULL. | |
275 | */ | |
d9bf3ca4 | 276 | struct ltt_ust_session *trace_ust_create_session(uint64_t session_id) |
97ee3a89 DG |
277 | { |
278 | struct ltt_ust_session *lus; | |
279 | ||
280 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 281 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 282 | if (lus == NULL) { |
ba7f0ae5 | 283 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
284 | goto error; |
285 | } | |
286 | ||
287 | /* Init data structure */ | |
a991f516 | 288 | lus->id = session_id; |
14fb1ebe | 289 | lus->active = 0; |
97ee3a89 | 290 | |
84ad93e8 DG |
291 | /* Set default metadata channel attribute. */ |
292 | lus->metadata_attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
293 | lus->metadata_attr.subbuf_size = default_get_metadata_subbuf_size(); | |
294 | lus->metadata_attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; | |
295 | lus->metadata_attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; | |
296 | lus->metadata_attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
297 | lus->metadata_attr.output = LTTNG_UST_MMAP; | |
298 | ||
7972aab2 DG |
299 | /* |
300 | * Default buffer type. This can be changed through an enable channel | |
301 | * requesting a different type. Note that this can only be changed once | |
302 | * during the session lifetime which is at the first enable channel and | |
303 | * only before start. The flag buffer_type_changed indicates the status. | |
304 | */ | |
8692d4e5 | 305 | lus->buffer_type = LTTNG_BUFFER_PER_UID; |
7972aab2 DG |
306 | /* Once set to 1, the buffer_type is immutable for the session. */ |
307 | lus->buffer_type_changed = 0; | |
308 | /* Init it in case it get used after allocation. */ | |
309 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
310 | |
311 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 312 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
fefd409b DG |
313 | /* Alloc agent hash table. */ |
314 | lus->agents = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
44d3bd01 | 315 | |
00e2e675 DG |
316 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
317 | if (lus->consumer == NULL) { | |
09a90bcd | 318 | goto error_consumer; |
00e2e675 DG |
319 | } |
320 | ||
44d3bd01 DG |
321 | DBG2("UST trace session create successful"); |
322 | ||
97ee3a89 DG |
323 | return lus; |
324 | ||
09a90bcd | 325 | error_consumer: |
0b2dc8df | 326 | ht_cleanup_push(lus->domain_global.channels); |
fefd409b | 327 | ht_cleanup_push(lus->agents); |
44844c29 | 328 | free(lus); |
97ee3a89 DG |
329 | error: |
330 | return NULL; | |
331 | } | |
332 | ||
333 | /* | |
334 | * Allocate and initialize a ust channel data structure. | |
335 | * | |
336 | * Return pointer to structure or NULL. | |
337 | */ | |
51755dc8 JG |
338 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan, |
339 | enum lttng_domain_type domain) | |
97ee3a89 | 340 | { |
97ee3a89 DG |
341 | struct ltt_ust_channel *luc; |
342 | ||
0525e9ae | 343 | assert(chan); |
0525e9ae | 344 | |
37357452 | 345 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 346 | if (luc == NULL) { |
df0f840b | 347 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
348 | goto error; |
349 | } | |
350 | ||
51755dc8 JG |
351 | luc->domain = domain; |
352 | ||
44d3bd01 | 353 | /* Copy UST channel attributes */ |
48842b30 DG |
354 | luc->attr.overwrite = chan->attr.overwrite; |
355 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
356 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
357 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
358 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 359 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
82b4ebce JG |
360 | luc->monitor_timer_interval = ((struct lttng_channel_extended *) |
361 | chan->attr.extended.ptr)->monitor_timer_interval; | |
491d1539 MD |
362 | luc->attr.u.s.blocking_timeout = ((struct lttng_channel_extended *) |
363 | chan->attr.extended.ptr)->blocking_timeout; | |
44d3bd01 DG |
364 | |
365 | /* Translate to UST output enum */ | |
366 | switch (luc->attr.output) { | |
367 | default: | |
368 | luc->attr.output = LTTNG_UST_MMAP; | |
369 | break; | |
97ee3a89 | 370 | } |
97ee3a89 | 371 | |
85076754 MD |
372 | /* |
373 | * If we receive an empty string for channel name, it means the | |
374 | * default channel name is requested. | |
375 | */ | |
376 | if (chan->name[0] == '\0') { | |
377 | strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name)); | |
378 | } else { | |
379 | /* Copy channel name */ | |
380 | strncpy(luc->name, chan->name, sizeof(luc->name)); | |
381 | } | |
97ee3a89 DG |
382 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
383 | ||
f6a9efaa | 384 | /* Init node */ |
bec39940 | 385 | lttng_ht_node_init_str(&luc->node, luc->name); |
31746f93 DG |
386 | CDS_INIT_LIST_HEAD(&luc->ctx_list); |
387 | ||
f6a9efaa | 388 | /* Alloc hash tables */ |
bec39940 DG |
389 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
390 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 391 | |
1624d5b7 JD |
392 | /* On-disk circular buffer parameters */ |
393 | luc->tracefile_size = chan->attr.tracefile_size; | |
394 | luc->tracefile_count = chan->attr.tracefile_count; | |
395 | ||
f6a9efaa DG |
396 | DBG2("Trace UST channel %s created", luc->name); |
397 | ||
97ee3a89 | 398 | error: |
7972aab2 | 399 | return luc; |
97ee3a89 DG |
400 | } |
401 | ||
ad11a1d3 PP |
402 | /* |
403 | * Validates an exclusion list. | |
404 | * | |
405 | * Returns 0 if valid, negative value if invalid. | |
406 | */ | |
407 | static int validate_exclusion(struct lttng_event_exclusion *exclusion) | |
408 | { | |
409 | size_t i; | |
410 | int ret = 0; | |
411 | ||
412 | assert(exclusion); | |
413 | ||
414 | for (i = 0; i < exclusion->count; ++i) { | |
415 | size_t j; | |
416 | const char *name_a = | |
417 | LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
418 | ||
419 | for (j = 0; j < i; ++j) { | |
420 | const char *name_b = | |
421 | LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, j); | |
422 | ||
423 | if (!strncmp(name_a, name_b, LTTNG_SYMBOL_NAME_LEN)) { | |
424 | /* Match! */ | |
425 | ret = -1; | |
426 | goto end; | |
427 | } | |
428 | } | |
429 | } | |
430 | ||
431 | end: | |
432 | return ret; | |
433 | } | |
434 | ||
97ee3a89 DG |
435 | /* |
436 | * Allocate and initialize a ust event. Set name and event type. | |
49d21f93 | 437 | * We own filter_expression, filter, and exclusion. |
97ee3a89 | 438 | * |
39687410 | 439 | * Return an lttng_error_code |
97ee3a89 | 440 | */ |
39687410 | 441 | enum lttng_error_code trace_ust_create_event(struct lttng_event *ev, |
6b453b5e | 442 | char *filter_expression, |
561c6897 | 443 | struct lttng_filter_bytecode *filter, |
88f06f15 | 444 | struct lttng_event_exclusion *exclusion, |
39687410 FD |
445 | bool internal_event, |
446 | struct ltt_ust_event **ust_event) | |
97ee3a89 | 447 | { |
39687410 FD |
448 | struct ltt_ust_event *local_ust_event; |
449 | enum lttng_error_code ret = LTTNG_OK; | |
97ee3a89 | 450 | |
0525e9ae DG |
451 | assert(ev); |
452 | ||
ad11a1d3 | 453 | if (exclusion && validate_exclusion(exclusion)) { |
39687410 | 454 | ret = LTTNG_ERR_INVALID; |
ad11a1d3 PP |
455 | goto error; |
456 | } | |
457 | ||
39687410 FD |
458 | local_ust_event = zmalloc(sizeof(struct ltt_ust_event)); |
459 | if (local_ust_event == NULL) { | |
ba7f0ae5 | 460 | PERROR("ust event zmalloc"); |
39687410 | 461 | ret = LTTNG_ERR_NOMEM; |
97ee3a89 DG |
462 | goto error; |
463 | } | |
464 | ||
39687410 | 465 | local_ust_event->internal = internal_event; |
88f06f15 | 466 | |
97ee3a89 DG |
467 | switch (ev->type) { |
468 | case LTTNG_EVENT_PROBE: | |
39687410 | 469 | local_ust_event->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
470 | break; |
471 | case LTTNG_EVENT_FUNCTION: | |
39687410 | 472 | local_ust_event->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
473 | break; |
474 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
39687410 | 475 | local_ust_event->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
476 | break; |
477 | case LTTNG_EVENT_TRACEPOINT: | |
39687410 | 478 | local_ust_event->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
479 | break; |
480 | default: | |
481 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
39687410 | 482 | ret = LTTNG_ERR_INVALID; |
44844c29 | 483 | goto error_free_event; |
97ee3a89 DG |
484 | } |
485 | ||
486 | /* Copy event name */ | |
39687410 FD |
487 | strncpy(local_ust_event->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
488 | local_ust_event->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 489 | |
0cda4f28 | 490 | switch (ev->loglevel_type) { |
8005f29a | 491 | case LTTNG_EVENT_LOGLEVEL_ALL: |
39687410 FD |
492 | local_ust_event->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; |
493 | local_ust_event->attr.loglevel = -1; /* Force to -1 */ | |
0cda4f28 | 494 | break; |
8005f29a | 495 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
39687410 FD |
496 | local_ust_event->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; |
497 | local_ust_event->attr.loglevel = ev->loglevel; | |
8005f29a MD |
498 | break; |
499 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
39687410 FD |
500 | local_ust_event->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; |
501 | local_ust_event->attr.loglevel = ev->loglevel; | |
0cda4f28 MD |
502 | break; |
503 | default: | |
4431494b | 504 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
39687410 | 505 | ret = LTTNG_ERR_INVALID; |
0cda4f28 MD |
506 | goto error_free_event; |
507 | } | |
508 | ||
025faf73 | 509 | /* Same layout. */ |
39687410 FD |
510 | local_ust_event->filter_expression = filter_expression; |
511 | local_ust_event->filter = filter; | |
512 | local_ust_event->exclusion = exclusion; | |
0cda4f28 | 513 | |
f6a9efaa | 514 | /* Init node */ |
39687410 | 515 | lttng_ht_node_init_str(&local_ust_event->node, local_ust_event->attr.name); |
97ee3a89 | 516 | |
300b8fd5 | 517 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
39687410 FD |
518 | local_ust_event->attr.name, local_ust_event->attr.loglevel_type, |
519 | local_ust_event->attr.loglevel); | |
520 | ||
521 | *ust_event = local_ust_event; | |
284d8f55 | 522 | |
39687410 | 523 | return ret; |
97ee3a89 | 524 | |
44844c29 | 525 | error_free_event: |
39687410 | 526 | free(local_ust_event); |
97ee3a89 | 527 | error: |
49d21f93 MD |
528 | free(filter_expression); |
529 | free(filter); | |
530 | free(exclusion); | |
39687410 | 531 | return ret; |
97ee3a89 DG |
532 | } |
533 | ||
aa3514e9 | 534 | static |
bdf64013 JG |
535 | int trace_ust_context_type_event_to_ust( |
536 | enum lttng_event_context_type type) | |
55cc08a6 | 537 | { |
aa3514e9 | 538 | int utype; |
0525e9ae | 539 | |
aa3514e9 | 540 | switch (type) { |
9197c5c4 MD |
541 | case LTTNG_EVENT_CONTEXT_VTID: |
542 | utype = LTTNG_UST_CONTEXT_VTID; | |
543 | break; | |
544 | case LTTNG_EVENT_CONTEXT_VPID: | |
545 | utype = LTTNG_UST_CONTEXT_VPID; | |
546 | break; | |
547 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
548 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
549 | break; | |
550 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
551 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
552 | break; | |
7c612c2e WP |
553 | case LTTNG_EVENT_CONTEXT_IP: |
554 | utype = LTTNG_UST_CONTEXT_IP; | |
555 | break; | |
aa3514e9 | 556 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: |
354e561b MD |
557 | if (!ustctl_has_perf_counters()) { |
558 | utype = -1; | |
559 | WARN("Perf counters not implemented in UST"); | |
560 | } else { | |
561 | utype = LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER; | |
562 | } | |
aa3514e9 | 563 | break; |
bdf64013 JG |
564 | case LTTNG_EVENT_CONTEXT_APP_CONTEXT: |
565 | utype = LTTNG_UST_CONTEXT_APP_CONTEXT; | |
566 | break; | |
9197c5c4 | 567 | default: |
aa3514e9 MD |
568 | utype = -1; |
569 | break; | |
570 | } | |
571 | return utype; | |
572 | } | |
573 | ||
574 | /* | |
575 | * Return 1 if contexts match, 0 otherwise. | |
576 | */ | |
df4f5a87 JG |
577 | int trace_ust_match_context(const struct ltt_ust_context *uctx, |
578 | const struct lttng_event_context *ctx) | |
aa3514e9 MD |
579 | { |
580 | int utype; | |
581 | ||
582 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
583 | if (utype < 0) { | |
584 | return 0; | |
585 | } | |
586 | if (uctx->ctx.ctx != utype) { | |
587 | return 0; | |
588 | } | |
589 | switch (utype) { | |
590 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
591 | if (uctx->ctx.u.perf_counter.type | |
592 | != ctx->u.perf_counter.type) { | |
593 | return 0; | |
594 | } | |
595 | if (uctx->ctx.u.perf_counter.config | |
596 | != ctx->u.perf_counter.config) { | |
597 | return 0; | |
598 | } | |
599 | if (strncmp(uctx->ctx.u.perf_counter.name, | |
600 | ctx->u.perf_counter.name, | |
601 | LTTNG_UST_SYM_NAME_LEN)) { | |
602 | return 0; | |
603 | } | |
604 | break; | |
54fb33cf JG |
605 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
606 | assert(uctx->ctx.u.app_ctx.provider_name); | |
607 | assert(uctx->ctx.u.app_ctx.ctx_name); | |
608 | if (strcmp(uctx->ctx.u.app_ctx.provider_name, | |
609 | ctx->u.app_ctx.provider_name) || | |
610 | strcmp(uctx->ctx.u.app_ctx.ctx_name, | |
611 | ctx->u.app_ctx.ctx_name)) { | |
612 | return 0; | |
613 | } | |
aa3514e9 MD |
614 | default: |
615 | break; | |
616 | ||
617 | } | |
618 | return 1; | |
619 | } | |
620 | ||
621 | /* | |
622 | * Allocate and initialize an UST context. | |
623 | * | |
624 | * Return pointer to structure or NULL. | |
625 | */ | |
626 | struct ltt_ust_context *trace_ust_create_context( | |
df4f5a87 | 627 | const struct lttng_event_context *ctx) |
aa3514e9 | 628 | { |
bdf64013 | 629 | struct ltt_ust_context *uctx = NULL; |
aa3514e9 MD |
630 | int utype; |
631 | ||
632 | assert(ctx); | |
633 | ||
634 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
635 | if (utype < 0) { | |
1cf992b8 | 636 | ERR("Invalid UST context"); |
bdf64013 | 637 | goto end; |
9197c5c4 | 638 | } |
55cc08a6 DG |
639 | |
640 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
bdf64013 | 641 | if (!uctx) { |
55cc08a6 | 642 | PERROR("zmalloc ltt_ust_context"); |
bdf64013 | 643 | goto end; |
55cc08a6 DG |
644 | } |
645 | ||
aa3514e9 MD |
646 | uctx->ctx.ctx = (enum lttng_ust_context_type) utype; |
647 | switch (utype) { | |
648 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
649 | uctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; | |
650 | uctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
651 | strncpy(uctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
652 | LTTNG_UST_SYM_NAME_LEN); | |
653 | uctx->ctx.u.perf_counter.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
654 | break; | |
bdf64013 JG |
655 | case LTTNG_UST_CONTEXT_APP_CONTEXT: |
656 | { | |
657 | char *provider_name = NULL, *ctx_name = NULL; | |
658 | ||
659 | provider_name = strdup(ctx->u.app_ctx.provider_name); | |
660 | if (!provider_name) { | |
661 | goto error; | |
662 | } | |
663 | uctx->ctx.u.app_ctx.provider_name = provider_name; | |
664 | ||
665 | ctx_name = strdup(ctx->u.app_ctx.ctx_name); | |
666 | if (!ctx_name) { | |
667 | goto error; | |
668 | } | |
669 | uctx->ctx.u.app_ctx.ctx_name = ctx_name; | |
670 | break; | |
671 | } | |
aa3514e9 MD |
672 | default: |
673 | break; | |
674 | } | |
bec39940 | 675 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
bdf64013 | 676 | end: |
55cc08a6 | 677 | return uctx; |
55cc08a6 | 678 | error: |
bdf64013 | 679 | trace_ust_destroy_context(uctx); |
55cc08a6 DG |
680 | return NULL; |
681 | } | |
682 | ||
a9ad0c8f MD |
683 | static |
684 | void destroy_pid_tracker_node_rcu(struct rcu_head *head) | |
685 | { | |
686 | struct ust_pid_tracker_node *tracker_node = | |
687 | caa_container_of(head, struct ust_pid_tracker_node, node.head); | |
688 | free(tracker_node); | |
689 | } | |
690 | ||
691 | static | |
692 | void destroy_pid_tracker_node(struct ust_pid_tracker_node *tracker_node) | |
693 | { | |
694 | ||
695 | call_rcu(&tracker_node->node.head, destroy_pid_tracker_node_rcu); | |
696 | } | |
697 | ||
698 | static | |
699 | int init_pid_tracker(struct ust_pid_tracker *pid_tracker) | |
700 | { | |
701 | int ret = 0; | |
702 | ||
703 | pid_tracker->ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
704 | if (!pid_tracker->ht) { | |
705 | ret = -1; | |
706 | goto end; | |
707 | } | |
708 | ||
709 | end: | |
710 | return ret; | |
711 | } | |
712 | ||
713 | /* | |
714 | * Teardown pid tracker content, but don't free pid_tracker object. | |
715 | */ | |
716 | static | |
717 | void fini_pid_tracker(struct ust_pid_tracker *pid_tracker) | |
718 | { | |
719 | struct ust_pid_tracker_node *tracker_node; | |
720 | struct lttng_ht_iter iter; | |
721 | ||
722 | if (!pid_tracker->ht) { | |
723 | return; | |
724 | } | |
725 | rcu_read_lock(); | |
726 | cds_lfht_for_each_entry(pid_tracker->ht->ht, | |
727 | &iter.iter, tracker_node, node.node) { | |
728 | int ret = lttng_ht_del(pid_tracker->ht, &iter); | |
729 | ||
730 | assert(!ret); | |
731 | destroy_pid_tracker_node(tracker_node); | |
732 | } | |
733 | rcu_read_unlock(); | |
734 | ht_cleanup_push(pid_tracker->ht); | |
735 | pid_tracker->ht = NULL; | |
736 | } | |
737 | ||
738 | static | |
739 | struct ust_pid_tracker_node *pid_tracker_lookup( | |
740 | struct ust_pid_tracker *pid_tracker, int pid, | |
741 | struct lttng_ht_iter *iter) | |
742 | { | |
743 | unsigned long _pid = (unsigned long) pid; | |
744 | struct lttng_ht_node_ulong *node; | |
745 | ||
746 | lttng_ht_lookup(pid_tracker->ht, (void *) _pid, iter); | |
747 | node = lttng_ht_iter_get_node_ulong(iter); | |
748 | if (node) { | |
749 | return caa_container_of(node, struct ust_pid_tracker_node, | |
750 | node); | |
751 | } else { | |
752 | return NULL; | |
753 | } | |
754 | } | |
755 | ||
756 | static | |
757 | int pid_tracker_add_pid(struct ust_pid_tracker *pid_tracker, int pid) | |
758 | { | |
759 | int retval = LTTNG_OK; | |
760 | struct ust_pid_tracker_node *tracker_node; | |
761 | struct lttng_ht_iter iter; | |
762 | ||
763 | if (pid < 0) { | |
764 | retval = LTTNG_ERR_INVALID; | |
765 | goto end; | |
766 | } | |
767 | tracker_node = pid_tracker_lookup(pid_tracker, pid, &iter); | |
768 | if (tracker_node) { | |
769 | /* Already exists. */ | |
b93a4a13 | 770 | retval = LTTNG_ERR_PID_TRACKED; |
a9ad0c8f MD |
771 | goto end; |
772 | } | |
773 | tracker_node = zmalloc(sizeof(*tracker_node)); | |
774 | if (!tracker_node) { | |
775 | retval = LTTNG_ERR_NOMEM; | |
776 | goto end; | |
777 | } | |
778 | lttng_ht_node_init_ulong(&tracker_node->node, (unsigned long) pid); | |
779 | lttng_ht_add_unique_ulong(pid_tracker->ht, &tracker_node->node); | |
780 | end: | |
781 | return retval; | |
782 | } | |
783 | ||
784 | static | |
785 | int pid_tracker_del_pid(struct ust_pid_tracker *pid_tracker, int pid) | |
786 | { | |
787 | int retval = LTTNG_OK, ret; | |
788 | struct ust_pid_tracker_node *tracker_node; | |
789 | struct lttng_ht_iter iter; | |
790 | ||
791 | if (pid < 0) { | |
792 | retval = LTTNG_ERR_INVALID; | |
793 | goto end; | |
794 | } | |
795 | tracker_node = pid_tracker_lookup(pid_tracker, pid, &iter); | |
796 | if (!tracker_node) { | |
797 | /* Not found */ | |
b93a4a13 | 798 | retval = LTTNG_ERR_PID_NOT_TRACKED; |
a9ad0c8f MD |
799 | goto end; |
800 | } | |
801 | ret = lttng_ht_del(pid_tracker->ht, &iter); | |
802 | assert(!ret); | |
803 | ||
804 | destroy_pid_tracker_node(tracker_node); | |
805 | end: | |
806 | return retval; | |
807 | } | |
808 | ||
809 | /* | |
810 | * The session lock is held when calling this function. | |
811 | */ | |
812 | int trace_ust_pid_tracker_lookup(struct ltt_ust_session *session, int pid) | |
813 | { | |
814 | struct lttng_ht_iter iter; | |
815 | ||
816 | if (!session->pid_tracker.ht) { | |
817 | return 1; | |
818 | } | |
819 | if (pid_tracker_lookup(&session->pid_tracker, pid, &iter)) { | |
820 | return 1; | |
821 | } | |
822 | return 0; | |
823 | } | |
824 | ||
825 | /* | |
826 | * Called with the session lock held. | |
827 | */ | |
828 | int trace_ust_track_pid(struct ltt_ust_session *session, int pid) | |
829 | { | |
830 | int retval = LTTNG_OK; | |
88e3c2f5 | 831 | bool should_update_apps = false; |
a9ad0c8f MD |
832 | |
833 | if (pid == -1) { | |
834 | /* Track all pids: destroy tracker if exists. */ | |
835 | if (session->pid_tracker.ht) { | |
836 | fini_pid_tracker(&session->pid_tracker); | |
837 | /* Ensure all apps have session. */ | |
88e3c2f5 | 838 | should_update_apps = true; |
a9ad0c8f MD |
839 | } |
840 | } else { | |
841 | int ret; | |
842 | ||
843 | if (!session->pid_tracker.ht) { | |
844 | /* Create tracker. */ | |
845 | if (init_pid_tracker(&session->pid_tracker)) { | |
846 | ERR("Error initializing PID tracker"); | |
847 | retval = LTTNG_ERR_NOMEM; | |
848 | goto end; | |
849 | } | |
850 | ret = pid_tracker_add_pid(&session->pid_tracker, pid); | |
851 | if (ret != LTTNG_OK) { | |
852 | retval = ret; | |
853 | fini_pid_tracker(&session->pid_tracker); | |
854 | goto end; | |
855 | } | |
856 | /* Remove all apps from session except pid. */ | |
88e3c2f5 | 857 | should_update_apps = true; |
a9ad0c8f MD |
858 | } else { |
859 | struct ust_app *app; | |
860 | ||
861 | ret = pid_tracker_add_pid(&session->pid_tracker, pid); | |
862 | if (ret != LTTNG_OK) { | |
863 | retval = ret; | |
864 | goto end; | |
865 | } | |
866 | /* Add session to application */ | |
867 | app = ust_app_find_by_pid(pid); | |
868 | if (app) { | |
88e3c2f5 | 869 | should_update_apps = true; |
a9ad0c8f MD |
870 | } |
871 | } | |
872 | } | |
88e3c2f5 JG |
873 | if (should_update_apps && session->active) { |
874 | ust_app_global_update_all(session); | |
875 | } | |
a9ad0c8f MD |
876 | end: |
877 | return retval; | |
878 | } | |
879 | ||
880 | /* | |
881 | * Called with the session lock held. | |
882 | */ | |
883 | int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid) | |
884 | { | |
885 | int retval = LTTNG_OK; | |
886 | ||
887 | if (pid == -1) { | |
888 | /* Create empty tracker, replace old tracker. */ | |
889 | struct ust_pid_tracker tmp_tracker; | |
890 | ||
891 | tmp_tracker = session->pid_tracker; | |
892 | if (init_pid_tracker(&session->pid_tracker)) { | |
893 | ERR("Error initializing PID tracker"); | |
894 | retval = LTTNG_ERR_NOMEM; | |
895 | /* Rollback operation. */ | |
896 | session->pid_tracker = tmp_tracker; | |
897 | goto end; | |
898 | } | |
899 | fini_pid_tracker(&tmp_tracker); | |
900 | ||
901 | /* Remove session from all applications */ | |
902 | ust_app_global_update_all(session); | |
903 | } else { | |
904 | int ret; | |
905 | struct ust_app *app; | |
906 | ||
907 | if (!session->pid_tracker.ht) { | |
b894343d JG |
908 | /* No PID being tracked. */ |
909 | retval = LTTNG_ERR_PID_NOT_TRACKED; | |
a9ad0c8f MD |
910 | goto end; |
911 | } | |
912 | /* Remove PID from tracker */ | |
913 | ret = pid_tracker_del_pid(&session->pid_tracker, pid); | |
914 | if (ret != LTTNG_OK) { | |
915 | retval = ret; | |
916 | goto end; | |
917 | } | |
918 | /* Remove session from application. */ | |
919 | app = ust_app_find_by_pid(pid); | |
920 | if (app) { | |
921 | ust_app_global_update(session, app); | |
922 | } | |
923 | } | |
924 | end: | |
925 | return retval; | |
926 | } | |
927 | ||
a5dfbb9d MD |
928 | /* |
929 | * Called with session lock held. | |
930 | */ | |
931 | ssize_t trace_ust_list_tracker_pids(struct ltt_ust_session *session, | |
932 | int32_t **_pids) | |
933 | { | |
934 | struct ust_pid_tracker_node *tracker_node; | |
935 | struct lttng_ht_iter iter; | |
936 | unsigned long count, i = 0; | |
937 | long approx[2]; | |
938 | int32_t *pids; | |
939 | int ret = 0; | |
940 | ||
941 | if (!session->pid_tracker.ht) { | |
942 | /* Tracker disabled. Set first entry to -1. */ | |
943 | pids = zmalloc(sizeof(*pids)); | |
944 | if (!pids) { | |
945 | ret = -1; | |
946 | goto end; | |
947 | } | |
948 | pids[0] = -1; | |
949 | *_pids = pids; | |
950 | return 1; | |
951 | } | |
952 | ||
953 | rcu_read_lock(); | |
954 | cds_lfht_count_nodes(session->pid_tracker.ht->ht, | |
955 | &approx[0], &count, &approx[1]); | |
956 | pids = zmalloc(sizeof(*pids) * count); | |
957 | if (!pids) { | |
958 | ret = -1; | |
959 | goto end; | |
960 | } | |
961 | cds_lfht_for_each_entry(session->pid_tracker.ht->ht, | |
962 | &iter.iter, tracker_node, node.node) { | |
963 | pids[i++] = tracker_node->node.key; | |
964 | } | |
965 | *_pids = pids; | |
966 | ret = count; | |
967 | end: | |
968 | rcu_read_unlock(); | |
969 | return ret; | |
970 | } | |
971 | ||
f6a9efaa DG |
972 | /* |
973 | * RCU safe free context structure. | |
974 | */ | |
975 | static void destroy_context_rcu(struct rcu_head *head) | |
976 | { | |
bec39940 DG |
977 | struct lttng_ht_node_ulong *node = |
978 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
979 | struct ltt_ust_context *ctx = |
980 | caa_container_of(node, struct ltt_ust_context, node); | |
981 | ||
bdf64013 | 982 | trace_ust_destroy_context(ctx); |
f6a9efaa DG |
983 | } |
984 | ||
985 | /* | |
986 | * Cleanup UST context hash table. | |
987 | */ | |
7bd39047 | 988 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
989 | { |
990 | int ret; | |
bec39940 DG |
991 | struct lttng_ht_node_ulong *node; |
992 | struct lttng_ht_iter iter; | |
31746f93 | 993 | struct ltt_ust_context *ctx; |
f6a9efaa | 994 | |
0525e9ae DG |
995 | assert(ht); |
996 | ||
36b588ed | 997 | rcu_read_lock(); |
bec39940 | 998 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
31746f93 DG |
999 | /* Remove from ordered list. */ |
1000 | ctx = caa_container_of(node, struct ltt_ust_context, node); | |
1001 | cds_list_del(&ctx->list); | |
1002 | /* Remove from channel's hash table. */ | |
bec39940 | 1003 | ret = lttng_ht_del(ht, &iter); |
f6a9efaa DG |
1004 | if (!ret) { |
1005 | call_rcu(&node->head, destroy_context_rcu); | |
1006 | } | |
f6a9efaa | 1007 | } |
36b588ed | 1008 | rcu_read_unlock(); |
ed52805d | 1009 | |
0b2dc8df | 1010 | ht_cleanup_push(ht); |
f6a9efaa DG |
1011 | } |
1012 | ||
97ee3a89 DG |
1013 | /* |
1014 | * Cleanup ust event structure. | |
1015 | */ | |
1016 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
1017 | { | |
0525e9ae DG |
1018 | assert(event); |
1019 | ||
f6a9efaa | 1020 | DBG2("Trace destroy UST event %s", event->attr.name); |
6b453b5e | 1021 | free(event->filter_expression); |
53a80697 | 1022 | free(event->filter); |
40024f8a | 1023 | free(event->exclusion); |
97ee3a89 DG |
1024 | free(event); |
1025 | } | |
1026 | ||
bdf64013 JG |
1027 | /* |
1028 | * Cleanup ust context structure. | |
1029 | */ | |
1030 | void trace_ust_destroy_context(struct ltt_ust_context *ctx) | |
1031 | { | |
1032 | assert(ctx); | |
1033 | ||
1034 | if (ctx->ctx.ctx == LTTNG_UST_CONTEXT_APP_CONTEXT) { | |
1035 | free(ctx->ctx.u.app_ctx.provider_name); | |
1036 | free(ctx->ctx.u.app_ctx.ctx_name); | |
1037 | } | |
1038 | free(ctx); | |
1039 | } | |
1040 | ||
f6a9efaa DG |
1041 | /* |
1042 | * URCU intermediate call to complete destroy event. | |
1043 | */ | |
1044 | static void destroy_event_rcu(struct rcu_head *head) | |
1045 | { | |
bec39940 DG |
1046 | struct lttng_ht_node_str *node = |
1047 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
1048 | struct ltt_ust_event *event = |
1049 | caa_container_of(node, struct ltt_ust_event, node); | |
1050 | ||
1051 | trace_ust_destroy_event(event); | |
1052 | } | |
1053 | ||
284d8f55 DG |
1054 | /* |
1055 | * Cleanup UST events hashtable. | |
1056 | */ | |
7bd39047 | 1057 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
1058 | { |
1059 | int ret; | |
bec39940 DG |
1060 | struct lttng_ht_node_str *node; |
1061 | struct lttng_ht_iter iter; | |
ed52805d | 1062 | |
0525e9ae DG |
1063 | assert(events); |
1064 | ||
36b588ed | 1065 | rcu_read_lock(); |
bec39940 DG |
1066 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
1067 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
1068 | assert(!ret); |
1069 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 1070 | } |
36b588ed | 1071 | rcu_read_unlock(); |
ed52805d | 1072 | |
0b2dc8df | 1073 | ht_cleanup_push(events); |
ed52805d DG |
1074 | } |
1075 | ||
97ee3a89 DG |
1076 | /* |
1077 | * Cleanup ust channel structure. | |
36b588ed MD |
1078 | * |
1079 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 1080 | */ |
36b588ed | 1081 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 1082 | { |
0525e9ae DG |
1083 | assert(channel); |
1084 | ||
f6a9efaa | 1085 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 1086 | |
97ee3a89 | 1087 | free(channel); |
f6a9efaa DG |
1088 | } |
1089 | ||
1090 | /* | |
1091 | * URCU intermediate call to complete destroy channel. | |
1092 | */ | |
1093 | static void destroy_channel_rcu(struct rcu_head *head) | |
1094 | { | |
bec39940 DG |
1095 | struct lttng_ht_node_str *node = |
1096 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
1097 | struct ltt_ust_channel *channel = |
1098 | caa_container_of(node, struct ltt_ust_channel, node); | |
1099 | ||
36b588ed MD |
1100 | _trace_ust_destroy_channel(channel); |
1101 | } | |
1102 | ||
1103 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
1104 | { | |
627cbbe7 MD |
1105 | /* Destroying all events of the channel */ |
1106 | destroy_events(channel->events); | |
1107 | /* Destroying all context of the channel */ | |
1108 | destroy_contexts(channel->ctx); | |
1109 | ||
36b588ed | 1110 | call_rcu(&channel->node.head, destroy_channel_rcu); |
97ee3a89 DG |
1111 | } |
1112 | ||
d5979e4a DG |
1113 | /* |
1114 | * Remove an UST channel from a channel HT. | |
1115 | */ | |
1116 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
1117 | struct ltt_ust_channel *channel) | |
1118 | { | |
1119 | int ret; | |
1120 | struct lttng_ht_iter iter; | |
1121 | ||
1122 | assert(ht); | |
1123 | assert(channel); | |
1124 | ||
1125 | iter.iter.node = &channel->node.node; | |
1126 | ret = lttng_ht_del(ht, &iter); | |
1127 | assert(!ret); | |
1128 | } | |
1129 | ||
97ee3a89 | 1130 | /* |
f6a9efaa | 1131 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 1132 | */ |
bec39940 | 1133 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa | 1134 | { |
bec39940 DG |
1135 | struct lttng_ht_node_str *node; |
1136 | struct lttng_ht_iter iter; | |
f6a9efaa | 1137 | |
0525e9ae DG |
1138 | assert(channels); |
1139 | ||
24d1723f | 1140 | rcu_read_lock(); |
bec39940 | 1141 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
627cbbe7 MD |
1142 | struct ltt_ust_channel *chan = |
1143 | caa_container_of(node, struct ltt_ust_channel, node); | |
1144 | ||
1145 | trace_ust_delete_channel(channels, chan); | |
1146 | trace_ust_destroy_channel(chan); | |
f6a9efaa | 1147 | } |
36b588ed | 1148 | rcu_read_unlock(); |
ed52805d | 1149 | |
0b2dc8df | 1150 | ht_cleanup_push(channels); |
f6a9efaa DG |
1151 | } |
1152 | ||
f6a9efaa DG |
1153 | /* |
1154 | * Cleanup UST global domain. | |
1155 | */ | |
1156 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
1157 | { | |
0525e9ae DG |
1158 | assert(dom); |
1159 | ||
f6a9efaa DG |
1160 | destroy_channels(dom->channels); |
1161 | } | |
97ee3a89 | 1162 | |
f6a9efaa | 1163 | /* |
d070c424 MD |
1164 | * Cleanup ust session structure, keeping data required by |
1165 | * destroy notifier. | |
36b588ed MD |
1166 | * |
1167 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
1168 | */ |
1169 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
1170 | { | |
fefd409b | 1171 | struct agent *agt; |
7972aab2 | 1172 | struct buffer_reg_uid *reg, *sreg; |
fefd409b | 1173 | struct lttng_ht_iter iter; |
7972aab2 | 1174 | |
0525e9ae | 1175 | assert(session); |
97ee3a89 | 1176 | |
d9bf3ca4 | 1177 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 1178 | |
f6a9efaa DG |
1179 | /* Cleaning up UST domain */ |
1180 | destroy_domain_global(&session->domain_global); | |
fefd409b | 1181 | |
0c0fcd77 | 1182 | rcu_read_lock(); |
fefd409b | 1183 | cds_lfht_for_each_entry(session->agents->ht, &iter.iter, agt, node.node) { |
d0edf546 JG |
1184 | int ret = lttng_ht_del(session->agents, &iter); |
1185 | ||
1186 | assert(!ret); | |
fefd409b DG |
1187 | agent_destroy(agt); |
1188 | } | |
0c0fcd77 | 1189 | rcu_read_unlock(); |
7972aab2 | 1190 | |
8ada2175 MD |
1191 | ht_cleanup_push(session->agents); |
1192 | ||
7972aab2 DG |
1193 | /* Cleanup UID buffer registry object(s). */ |
1194 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
1195 | lnode) { | |
1196 | cds_list_del(®->lnode); | |
1197 | buffer_reg_uid_remove(reg); | |
1198 | buffer_reg_uid_destroy(reg, session->consumer); | |
1199 | } | |
44d3bd01 | 1200 | |
a9ad0c8f | 1201 | fini_pid_tracker(&session->pid_tracker); |
82b69413 | 1202 | lttng_trace_chunk_put(session->current_trace_chunk); |
d070c424 MD |
1203 | } |
1204 | ||
1205 | /* Free elements needed by destroy notifiers. */ | |
1206 | void trace_ust_free_session(struct ltt_ust_session *session) | |
1207 | { | |
1208 | consumer_output_put(session->consumer); | |
97ee3a89 DG |
1209 | free(session); |
1210 | } |