Commit | Line | Data |
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97ee3a89 | 1 | /* |
21cf9b6b | 2 | * Copyright (C) 2011 EfficiOS Inc. |
ab5be9fa | 3 | * Copyright (C) 2016 Jérémie Galarneau <jeremie.galarneau@efficios.com> |
97ee3a89 | 4 | * |
ab5be9fa | 5 | * SPDX-License-Identifier: GPL-2.0-only |
97ee3a89 | 6 | * |
97ee3a89 DG |
7 | */ |
8 | ||
6c1c0768 | 9 | #define _LGPL_SOURCE |
97ee3a89 DG |
10 | #include <stdio.h> |
11 | #include <stdlib.h> | |
12 | #include <string.h> | |
13 | #include <unistd.h> | |
d9bf3ca4 | 14 | #include <inttypes.h> |
97ee3a89 | 15 | |
c9e313bc SM |
16 | #include <common/common.hpp> |
17 | #include <common/defaults.hpp> | |
18 | #include <common/trace-chunk.hpp> | |
19 | #include <common/utils.hpp> | |
97ee3a89 | 20 | |
c9e313bc SM |
21 | #include "buffer-registry.hpp" |
22 | #include "trace-ust.hpp" | |
23 | #include "utils.hpp" | |
24 | #include "ust-app.hpp" | |
25 | #include "agent.hpp" | |
97ee3a89 | 26 | |
025faf73 DG |
27 | /* |
28 | * Match function for the events hash table lookup. | |
29 | * | |
30 | * Matches by name only. Used by the disable command. | |
31 | */ | |
18eace3b DG |
32 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
33 | const void *_key) | |
34 | { | |
35 | struct ltt_ust_event *event; | |
36 | const char *name; | |
37 | ||
a0377dfe FD |
38 | LTTNG_ASSERT(node); |
39 | LTTNG_ASSERT(_key); | |
18eace3b DG |
40 | |
41 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
7966af57 | 42 | name = (const char *) _key; |
18eace3b DG |
43 | |
44 | /* Event name */ | |
45 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
46 | goto no_match; | |
47 | } | |
48 | ||
025faf73 | 49 | /* Match */ |
18eace3b DG |
50 | return 1; |
51 | ||
52 | no_match: | |
53 | return 0; | |
54 | } | |
55 | ||
025faf73 DG |
56 | /* |
57 | * Match function for the hash table lookup. | |
58 | * | |
59 | * It matches an ust event based on three attributes which are the event name, | |
60 | * the filter bytecode and the loglevel. | |
61 | */ | |
18eace3b DG |
62 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
63 | { | |
64 | struct ltt_ust_event *event; | |
65 | const struct ltt_ust_ht_key *key; | |
2106efa0 | 66 | int ev_loglevel_value; |
19a97244 | 67 | int ll_match; |
18eace3b | 68 | |
a0377dfe FD |
69 | LTTNG_ASSERT(node); |
70 | LTTNG_ASSERT(_key); | |
18eace3b DG |
71 | |
72 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
7966af57 | 73 | key = (ltt_ust_ht_key *) _key; |
2106efa0 | 74 | ev_loglevel_value = event->attr.loglevel; |
18eace3b | 75 | |
f19e9f8b | 76 | /* Match the 4 elements of the key: name, filter, loglevel, exclusions. */ |
18eace3b DG |
77 | |
78 | /* Event name */ | |
79 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
80 | goto no_match; |
81 | } | |
82 | ||
b953b8cd | 83 | /* Event loglevel value and type. */ |
19a97244 PP |
84 | ll_match = loglevels_match(event->attr.loglevel_type, |
85 | ev_loglevel_value, key->loglevel_type, | |
fc4b93fa | 86 | key->loglevel_value, LTTNG_UST_ABI_LOGLEVEL_ALL); |
19a97244 PP |
87 | |
88 | if (!ll_match) { | |
b953b8cd | 89 | goto no_match; |
18eace3b DG |
90 | } |
91 | ||
92 | /* Only one of the filters is NULL, fail. */ | |
93 | if ((key->filter && !event->filter) || (!key->filter && event->filter)) { | |
18eace3b DG |
94 | goto no_match; |
95 | } | |
96 | ||
025faf73 DG |
97 | if (key->filter && event->filter) { |
98 | /* Both filters exists, check length followed by the bytecode. */ | |
99 | if (event->filter->len != key->filter->len || | |
100 | memcmp(event->filter->data, key->filter->data, | |
101 | event->filter->len) != 0) { | |
102 | goto no_match; | |
103 | } | |
18eace3b DG |
104 | } |
105 | ||
f19e9f8b JI |
106 | /* If only one of the exclusions is NULL, fail. */ |
107 | if ((key->exclusion && !event->exclusion) || (!key->exclusion && event->exclusion)) { | |
108 | goto no_match; | |
109 | } | |
110 | ||
111 | if (key->exclusion && event->exclusion) { | |
a5b7e00c PP |
112 | size_t i; |
113 | ||
114 | /* Check exclusion counts first. */ | |
115 | if (event->exclusion->count != key->exclusion->count) { | |
f19e9f8b JI |
116 | goto no_match; |
117 | } | |
a5b7e00c PP |
118 | |
119 | /* Compare names individually. */ | |
120 | for (i = 0; i < event->exclusion->count; ++i) { | |
121 | size_t j; | |
122 | bool found = false; | |
123 | const char *name_ev = | |
124 | LTTNG_EVENT_EXCLUSION_NAME_AT( | |
125 | event->exclusion, i); | |
126 | ||
127 | /* | |
128 | * Compare this exclusion name to all the key's | |
129 | * exclusion names. | |
130 | */ | |
131 | for (j = 0; j < key->exclusion->count; ++j) { | |
132 | const char *name_key = | |
133 | LTTNG_EVENT_EXCLUSION_NAME_AT( | |
134 | key->exclusion, j); | |
135 | ||
136 | if (!strncmp(name_ev, name_key, | |
137 | LTTNG_SYMBOL_NAME_LEN)) { | |
138 | /* Names match! */ | |
139 | found = true; | |
140 | break; | |
141 | } | |
142 | } | |
143 | ||
144 | /* | |
145 | * If the current exclusion name was not found amongst | |
146 | * the key's exclusion names, then there's no match. | |
147 | */ | |
148 | if (!found) { | |
149 | goto no_match; | |
150 | } | |
151 | } | |
f19e9f8b | 152 | } |
025faf73 DG |
153 | /* Match. */ |
154 | return 1; | |
18eace3b DG |
155 | |
156 | no_match: | |
157 | return 0; | |
18eace3b DG |
158 | } |
159 | ||
0177d773 | 160 | /* |
2223c96f DG |
161 | * Find the channel in the hashtable and return channel pointer. RCU read side |
162 | * lock MUST be acquired before calling this. | |
0177d773 | 163 | */ |
bec39940 | 164 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
df4f5a87 | 165 | const char *name) |
0177d773 | 166 | { |
bec39940 DG |
167 | struct lttng_ht_node_str *node; |
168 | struct lttng_ht_iter iter; | |
0177d773 | 169 | |
48b7cdc2 | 170 | ASSERT_RCU_READ_LOCKED(); |
85076754 MD |
171 | /* |
172 | * If we receive an empty string for channel name, it means the | |
173 | * default channel name is requested. | |
174 | */ | |
175 | if (name[0] == '\0') | |
176 | name = DEFAULT_CHANNEL_NAME; | |
177 | ||
bec39940 DG |
178 | lttng_ht_lookup(ht, (void *)name, &iter); |
179 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 180 | if (node == NULL) { |
44d3bd01 DG |
181 | goto error; |
182 | } | |
183 | ||
f6a9efaa | 184 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 185 | |
f6a9efaa | 186 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
187 | |
188 | error: | |
f6a9efaa | 189 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
190 | return NULL; |
191 | } | |
192 | ||
193 | /* | |
2223c96f DG |
194 | * Find the event in the hashtable and return event pointer. RCU read side lock |
195 | * MUST be acquired before calling this. | |
97ee3a89 | 196 | */ |
18eace3b | 197 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
2b00d462 | 198 | char *name, struct lttng_bytecode *filter, |
fc4b93fa | 199 | enum lttng_ust_abi_loglevel_type loglevel_type, int loglevel_value, |
b953b8cd | 200 | struct lttng_event_exclusion *exclusion) |
97ee3a89 | 201 | { |
bec39940 DG |
202 | struct lttng_ht_node_str *node; |
203 | struct lttng_ht_iter iter; | |
18eace3b | 204 | struct ltt_ust_ht_key key; |
97ee3a89 | 205 | |
a0377dfe FD |
206 | LTTNG_ASSERT(name); |
207 | LTTNG_ASSERT(ht); | |
48b7cdc2 | 208 | ASSERT_RCU_READ_LOCKED(); |
18eace3b DG |
209 | |
210 | key.name = name; | |
211 | key.filter = filter; | |
b953b8cd PP |
212 | key.loglevel_type = loglevel_type; |
213 | key.loglevel_value = loglevel_value; | |
10646003 | 214 | key.exclusion = exclusion; |
18eace3b | 215 | |
18eace3b DG |
216 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
217 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 218 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 219 | if (node == NULL) { |
97ee3a89 DG |
220 | goto error; |
221 | } | |
222 | ||
18eace3b | 223 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
224 | |
225 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
226 | |
227 | error: | |
18eace3b | 228 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
229 | return NULL; |
230 | } | |
231 | ||
fefd409b DG |
232 | /* |
233 | * Lookup an agent in the session agents hash table by domain type and return | |
234 | * the object if found else NULL. | |
4da703ad JG |
235 | * |
236 | * RCU read side lock must be acquired before calling and only released | |
237 | * once the agent is no longer in scope or being used. | |
fefd409b DG |
238 | */ |
239 | struct agent *trace_ust_find_agent(struct ltt_ust_session *session, | |
240 | enum lttng_domain_type domain_type) | |
241 | { | |
242 | struct agent *agt = NULL; | |
243 | struct lttng_ht_node_u64 *node; | |
244 | struct lttng_ht_iter iter; | |
245 | uint64_t key; | |
246 | ||
a0377dfe | 247 | LTTNG_ASSERT(session); |
fefd409b DG |
248 | |
249 | DBG3("Trace ust agent lookup for domain %d", domain_type); | |
250 | ||
251 | key = domain_type; | |
252 | ||
253 | lttng_ht_lookup(session->agents, &key, &iter); | |
254 | node = lttng_ht_iter_get_node_u64(&iter); | |
255 | if (!node) { | |
256 | goto end; | |
257 | } | |
258 | agt = caa_container_of(node, struct agent, node); | |
259 | ||
260 | end: | |
261 | return agt; | |
262 | } | |
263 | ||
97ee3a89 DG |
264 | /* |
265 | * Allocate and initialize a ust session data structure. | |
266 | * | |
267 | * Return pointer to structure or NULL. | |
268 | */ | |
d9bf3ca4 | 269 | struct ltt_ust_session *trace_ust_create_session(uint64_t session_id) |
97ee3a89 DG |
270 | { |
271 | struct ltt_ust_session *lus; | |
272 | ||
273 | /* Allocate a new ltt ust session */ | |
64803277 | 274 | lus = zmalloc<ltt_ust_session>(); |
97ee3a89 | 275 | if (lus == NULL) { |
ba7f0ae5 | 276 | PERROR("create ust session zmalloc"); |
55c9e7ca | 277 | goto error_alloc; |
97ee3a89 DG |
278 | } |
279 | ||
280 | /* Init data structure */ | |
a991f516 | 281 | lus->id = session_id; |
14fb1ebe | 282 | lus->active = 0; |
97ee3a89 | 283 | |
84ad93e8 DG |
284 | /* Set default metadata channel attribute. */ |
285 | lus->metadata_attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
286 | lus->metadata_attr.subbuf_size = default_get_metadata_subbuf_size(); | |
287 | lus->metadata_attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; | |
288 | lus->metadata_attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; | |
289 | lus->metadata_attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
fc4b93fa | 290 | lus->metadata_attr.output = LTTNG_UST_ABI_MMAP; |
84ad93e8 | 291 | |
7972aab2 DG |
292 | /* |
293 | * Default buffer type. This can be changed through an enable channel | |
294 | * requesting a different type. Note that this can only be changed once | |
295 | * during the session lifetime which is at the first enable channel and | |
296 | * only before start. The flag buffer_type_changed indicates the status. | |
297 | */ | |
8692d4e5 | 298 | lus->buffer_type = LTTNG_BUFFER_PER_UID; |
7972aab2 DG |
299 | /* Once set to 1, the buffer_type is immutable for the session. */ |
300 | lus->buffer_type_changed = 0; | |
301 | /* Init it in case it get used after allocation. */ | |
302 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
303 | |
304 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 305 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
fefd409b DG |
306 | /* Alloc agent hash table. */ |
307 | lus->agents = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
44d3bd01 | 308 | |
159b042f JG |
309 | lus->tracker_vpid = process_attr_tracker_create(); |
310 | if (!lus->tracker_vpid) { | |
55c9e7ca JR |
311 | goto error; |
312 | } | |
159b042f JG |
313 | lus->tracker_vuid = process_attr_tracker_create(); |
314 | if (!lus->tracker_vuid) { | |
55c9e7ca JR |
315 | goto error; |
316 | } | |
159b042f JG |
317 | lus->tracker_vgid = process_attr_tracker_create(); |
318 | if (!lus->tracker_vgid) { | |
55c9e7ca JR |
319 | goto error; |
320 | } | |
00e2e675 DG |
321 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
322 | if (lus->consumer == NULL) { | |
55c9e7ca | 323 | goto error; |
00e2e675 DG |
324 | } |
325 | ||
44d3bd01 DG |
326 | DBG2("UST trace session create successful"); |
327 | ||
97ee3a89 DG |
328 | return lus; |
329 | ||
55c9e7ca | 330 | error: |
159b042f JG |
331 | process_attr_tracker_destroy(lus->tracker_vpid); |
332 | process_attr_tracker_destroy(lus->tracker_vuid); | |
333 | process_attr_tracker_destroy(lus->tracker_vgid); | |
3c339053 FD |
334 | lttng_ht_destroy(lus->domain_global.channels); |
335 | lttng_ht_destroy(lus->agents); | |
44844c29 | 336 | free(lus); |
55c9e7ca | 337 | error_alloc: |
97ee3a89 DG |
338 | return NULL; |
339 | } | |
340 | ||
341 | /* | |
342 | * Allocate and initialize a ust channel data structure. | |
343 | * | |
344 | * Return pointer to structure or NULL. | |
345 | */ | |
51755dc8 JG |
346 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan, |
347 | enum lttng_domain_type domain) | |
97ee3a89 | 348 | { |
97ee3a89 DG |
349 | struct ltt_ust_channel *luc; |
350 | ||
a0377dfe | 351 | LTTNG_ASSERT(chan); |
0525e9ae | 352 | |
64803277 | 353 | luc = zmalloc<ltt_ust_channel>(); |
97ee3a89 | 354 | if (luc == NULL) { |
df0f840b | 355 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
356 | goto error; |
357 | } | |
358 | ||
51755dc8 JG |
359 | luc->domain = domain; |
360 | ||
44d3bd01 | 361 | /* Copy UST channel attributes */ |
48842b30 DG |
362 | luc->attr.overwrite = chan->attr.overwrite; |
363 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
364 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
365 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
366 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
fc4b93fa | 367 | luc->attr.output = (enum lttng_ust_abi_output) chan->attr.output; |
82b4ebce JG |
368 | luc->monitor_timer_interval = ((struct lttng_channel_extended *) |
369 | chan->attr.extended.ptr)->monitor_timer_interval; | |
491d1539 MD |
370 | luc->attr.u.s.blocking_timeout = ((struct lttng_channel_extended *) |
371 | chan->attr.extended.ptr)->blocking_timeout; | |
44d3bd01 DG |
372 | |
373 | /* Translate to UST output enum */ | |
374 | switch (luc->attr.output) { | |
375 | default: | |
fc4b93fa | 376 | luc->attr.output = LTTNG_UST_ABI_MMAP; |
44d3bd01 | 377 | break; |
97ee3a89 | 378 | } |
97ee3a89 | 379 | |
85076754 MD |
380 | /* |
381 | * If we receive an empty string for channel name, it means the | |
382 | * default channel name is requested. | |
383 | */ | |
384 | if (chan->name[0] == '\0') { | |
385 | strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name)); | |
386 | } else { | |
387 | /* Copy channel name */ | |
388 | strncpy(luc->name, chan->name, sizeof(luc->name)); | |
389 | } | |
fc4b93fa | 390 | luc->name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; |
97ee3a89 | 391 | |
f6a9efaa | 392 | /* Init node */ |
bec39940 | 393 | lttng_ht_node_init_str(&luc->node, luc->name); |
31746f93 DG |
394 | CDS_INIT_LIST_HEAD(&luc->ctx_list); |
395 | ||
f6a9efaa | 396 | /* Alloc hash tables */ |
bec39940 DG |
397 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
398 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 399 | |
1624d5b7 JD |
400 | /* On-disk circular buffer parameters */ |
401 | luc->tracefile_size = chan->attr.tracefile_size; | |
402 | luc->tracefile_count = chan->attr.tracefile_count; | |
403 | ||
f6a9efaa DG |
404 | DBG2("Trace UST channel %s created", luc->name); |
405 | ||
97ee3a89 | 406 | error: |
7972aab2 | 407 | return luc; |
97ee3a89 DG |
408 | } |
409 | ||
ad11a1d3 PP |
410 | /* |
411 | * Validates an exclusion list. | |
412 | * | |
413 | * Returns 0 if valid, negative value if invalid. | |
414 | */ | |
415 | static int validate_exclusion(struct lttng_event_exclusion *exclusion) | |
416 | { | |
417 | size_t i; | |
418 | int ret = 0; | |
419 | ||
a0377dfe | 420 | LTTNG_ASSERT(exclusion); |
ad11a1d3 PP |
421 | |
422 | for (i = 0; i < exclusion->count; ++i) { | |
423 | size_t j; | |
424 | const char *name_a = | |
425 | LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, i); | |
426 | ||
427 | for (j = 0; j < i; ++j) { | |
428 | const char *name_b = | |
429 | LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion, j); | |
430 | ||
431 | if (!strncmp(name_a, name_b, LTTNG_SYMBOL_NAME_LEN)) { | |
432 | /* Match! */ | |
433 | ret = -1; | |
434 | goto end; | |
435 | } | |
436 | } | |
437 | } | |
438 | ||
439 | end: | |
440 | return ret; | |
441 | } | |
442 | ||
97ee3a89 DG |
443 | /* |
444 | * Allocate and initialize a ust event. Set name and event type. | |
49d21f93 | 445 | * We own filter_expression, filter, and exclusion. |
97ee3a89 | 446 | * |
39687410 | 447 | * Return an lttng_error_code |
97ee3a89 | 448 | */ |
39687410 | 449 | enum lttng_error_code trace_ust_create_event(struct lttng_event *ev, |
6b453b5e | 450 | char *filter_expression, |
2b00d462 | 451 | struct lttng_bytecode *filter, |
88f06f15 | 452 | struct lttng_event_exclusion *exclusion, |
39687410 FD |
453 | bool internal_event, |
454 | struct ltt_ust_event **ust_event) | |
97ee3a89 | 455 | { |
39687410 FD |
456 | struct ltt_ust_event *local_ust_event; |
457 | enum lttng_error_code ret = LTTNG_OK; | |
97ee3a89 | 458 | |
a0377dfe | 459 | LTTNG_ASSERT(ev); |
0525e9ae | 460 | |
ad11a1d3 | 461 | if (exclusion && validate_exclusion(exclusion)) { |
39687410 | 462 | ret = LTTNG_ERR_INVALID; |
ad11a1d3 PP |
463 | goto error; |
464 | } | |
465 | ||
64803277 | 466 | local_ust_event = zmalloc<ltt_ust_event>(); |
39687410 | 467 | if (local_ust_event == NULL) { |
ba7f0ae5 | 468 | PERROR("ust event zmalloc"); |
39687410 | 469 | ret = LTTNG_ERR_NOMEM; |
97ee3a89 DG |
470 | goto error; |
471 | } | |
472 | ||
39687410 | 473 | local_ust_event->internal = internal_event; |
88f06f15 | 474 | |
97ee3a89 DG |
475 | switch (ev->type) { |
476 | case LTTNG_EVENT_PROBE: | |
fc4b93fa | 477 | local_ust_event->attr.instrumentation = LTTNG_UST_ABI_PROBE; |
97ee3a89 DG |
478 | break; |
479 | case LTTNG_EVENT_FUNCTION: | |
fc4b93fa | 480 | local_ust_event->attr.instrumentation = LTTNG_UST_ABI_FUNCTION; |
97ee3a89 DG |
481 | break; |
482 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
fc4b93fa | 483 | local_ust_event->attr.instrumentation = LTTNG_UST_ABI_FUNCTION; |
97ee3a89 DG |
484 | break; |
485 | case LTTNG_EVENT_TRACEPOINT: | |
fc4b93fa | 486 | local_ust_event->attr.instrumentation = LTTNG_UST_ABI_TRACEPOINT; |
97ee3a89 DG |
487 | break; |
488 | default: | |
489 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
39687410 | 490 | ret = LTTNG_ERR_INVALID; |
44844c29 | 491 | goto error_free_event; |
97ee3a89 DG |
492 | } |
493 | ||
494 | /* Copy event name */ | |
fc4b93fa MD |
495 | strncpy(local_ust_event->attr.name, ev->name, LTTNG_UST_ABI_SYM_NAME_LEN); |
496 | local_ust_event->attr.name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 497 | |
0cda4f28 | 498 | switch (ev->loglevel_type) { |
8005f29a | 499 | case LTTNG_EVENT_LOGLEVEL_ALL: |
fc4b93fa | 500 | local_ust_event->attr.loglevel_type = LTTNG_UST_ABI_LOGLEVEL_ALL; |
39687410 | 501 | local_ust_event->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 502 | break; |
8005f29a | 503 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
fc4b93fa | 504 | local_ust_event->attr.loglevel_type = LTTNG_UST_ABI_LOGLEVEL_RANGE; |
39687410 | 505 | local_ust_event->attr.loglevel = ev->loglevel; |
8005f29a MD |
506 | break; |
507 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
fc4b93fa | 508 | local_ust_event->attr.loglevel_type = LTTNG_UST_ABI_LOGLEVEL_SINGLE; |
39687410 | 509 | local_ust_event->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
510 | break; |
511 | default: | |
4431494b | 512 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
39687410 | 513 | ret = LTTNG_ERR_INVALID; |
0cda4f28 MD |
514 | goto error_free_event; |
515 | } | |
516 | ||
025faf73 | 517 | /* Same layout. */ |
39687410 FD |
518 | local_ust_event->filter_expression = filter_expression; |
519 | local_ust_event->filter = filter; | |
520 | local_ust_event->exclusion = exclusion; | |
0cda4f28 | 521 | |
f6a9efaa | 522 | /* Init node */ |
39687410 | 523 | lttng_ht_node_init_str(&local_ust_event->node, local_ust_event->attr.name); |
97ee3a89 | 524 | |
300b8fd5 | 525 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
39687410 FD |
526 | local_ust_event->attr.name, local_ust_event->attr.loglevel_type, |
527 | local_ust_event->attr.loglevel); | |
528 | ||
529 | *ust_event = local_ust_event; | |
284d8f55 | 530 | |
39687410 | 531 | return ret; |
97ee3a89 | 532 | |
44844c29 | 533 | error_free_event: |
39687410 | 534 | free(local_ust_event); |
97ee3a89 | 535 | error: |
49d21f93 MD |
536 | free(filter_expression); |
537 | free(filter); | |
538 | free(exclusion); | |
39687410 | 539 | return ret; |
97ee3a89 DG |
540 | } |
541 | ||
aa3514e9 | 542 | static |
bdf64013 JG |
543 | int trace_ust_context_type_event_to_ust( |
544 | enum lttng_event_context_type type) | |
55cc08a6 | 545 | { |
aa3514e9 | 546 | int utype; |
0525e9ae | 547 | |
aa3514e9 | 548 | switch (type) { |
9197c5c4 | 549 | case LTTNG_EVENT_CONTEXT_VTID: |
fc4b93fa | 550 | utype = LTTNG_UST_ABI_CONTEXT_VTID; |
9197c5c4 MD |
551 | break; |
552 | case LTTNG_EVENT_CONTEXT_VPID: | |
fc4b93fa | 553 | utype = LTTNG_UST_ABI_CONTEXT_VPID; |
9197c5c4 MD |
554 | break; |
555 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
fc4b93fa | 556 | utype = LTTNG_UST_ABI_CONTEXT_PTHREAD_ID; |
9197c5c4 MD |
557 | break; |
558 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
fc4b93fa | 559 | utype = LTTNG_UST_ABI_CONTEXT_PROCNAME; |
9197c5c4 | 560 | break; |
7c612c2e | 561 | case LTTNG_EVENT_CONTEXT_IP: |
fc4b93fa | 562 | utype = LTTNG_UST_ABI_CONTEXT_IP; |
7c612c2e | 563 | break; |
aa3514e9 | 564 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: |
b623cb6a | 565 | if (!lttng_ust_ctl_has_perf_counters()) { |
354e561b MD |
566 | utype = -1; |
567 | WARN("Perf counters not implemented in UST"); | |
568 | } else { | |
fc4b93fa | 569 | utype = LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER; |
354e561b | 570 | } |
aa3514e9 | 571 | break; |
bdf64013 | 572 | case LTTNG_EVENT_CONTEXT_APP_CONTEXT: |
fc4b93fa | 573 | utype = LTTNG_UST_ABI_CONTEXT_APP_CONTEXT; |
bdf64013 | 574 | break; |
f17b8732 | 575 | case LTTNG_EVENT_CONTEXT_CGROUP_NS: |
fc4b93fa | 576 | utype = LTTNG_UST_ABI_CONTEXT_CGROUP_NS; |
f17b8732 MJ |
577 | break; |
578 | case LTTNG_EVENT_CONTEXT_IPC_NS: | |
fc4b93fa | 579 | utype = LTTNG_UST_ABI_CONTEXT_IPC_NS; |
f17b8732 MJ |
580 | break; |
581 | case LTTNG_EVENT_CONTEXT_MNT_NS: | |
fc4b93fa | 582 | utype = LTTNG_UST_ABI_CONTEXT_MNT_NS; |
f17b8732 MJ |
583 | break; |
584 | case LTTNG_EVENT_CONTEXT_NET_NS: | |
fc4b93fa | 585 | utype = LTTNG_UST_ABI_CONTEXT_NET_NS; |
f17b8732 MJ |
586 | break; |
587 | case LTTNG_EVENT_CONTEXT_PID_NS: | |
fc4b93fa | 588 | utype = LTTNG_UST_ABI_CONTEXT_PID_NS; |
f17b8732 | 589 | break; |
d37ac3cd | 590 | case LTTNG_EVENT_CONTEXT_TIME_NS: |
fc4b93fa | 591 | utype = LTTNG_UST_ABI_CONTEXT_TIME_NS; |
d37ac3cd | 592 | break; |
f17b8732 | 593 | case LTTNG_EVENT_CONTEXT_USER_NS: |
fc4b93fa | 594 | utype = LTTNG_UST_ABI_CONTEXT_USER_NS; |
f17b8732 MJ |
595 | break; |
596 | case LTTNG_EVENT_CONTEXT_UTS_NS: | |
fc4b93fa | 597 | utype = LTTNG_UST_ABI_CONTEXT_UTS_NS; |
f17b8732 | 598 | break; |
4fc59cb8 | 599 | case LTTNG_EVENT_CONTEXT_VUID: |
fc4b93fa | 600 | utype = LTTNG_UST_ABI_CONTEXT_VUID; |
4fc59cb8 MJ |
601 | break; |
602 | case LTTNG_EVENT_CONTEXT_VEUID: | |
fc4b93fa | 603 | utype = LTTNG_UST_ABI_CONTEXT_VEUID; |
4fc59cb8 MJ |
604 | break; |
605 | case LTTNG_EVENT_CONTEXT_VSUID: | |
fc4b93fa | 606 | utype = LTTNG_UST_ABI_CONTEXT_VSUID; |
4fc59cb8 MJ |
607 | break; |
608 | case LTTNG_EVENT_CONTEXT_VGID: | |
fc4b93fa | 609 | utype = LTTNG_UST_ABI_CONTEXT_VGID; |
4fc59cb8 MJ |
610 | break; |
611 | case LTTNG_EVENT_CONTEXT_VEGID: | |
fc4b93fa | 612 | utype = LTTNG_UST_ABI_CONTEXT_VEGID; |
4fc59cb8 MJ |
613 | break; |
614 | case LTTNG_EVENT_CONTEXT_VSGID: | |
fc4b93fa | 615 | utype = LTTNG_UST_ABI_CONTEXT_VSGID; |
4fc59cb8 | 616 | break; |
9197c5c4 | 617 | default: |
aa3514e9 MD |
618 | utype = -1; |
619 | break; | |
620 | } | |
621 | return utype; | |
622 | } | |
623 | ||
624 | /* | |
625 | * Return 1 if contexts match, 0 otherwise. | |
626 | */ | |
df4f5a87 JG |
627 | int trace_ust_match_context(const struct ltt_ust_context *uctx, |
628 | const struct lttng_event_context *ctx) | |
aa3514e9 MD |
629 | { |
630 | int utype; | |
631 | ||
632 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
633 | if (utype < 0) { | |
634 | return 0; | |
635 | } | |
636 | if (uctx->ctx.ctx != utype) { | |
637 | return 0; | |
638 | } | |
639 | switch (utype) { | |
fc4b93fa | 640 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
aa3514e9 MD |
641 | if (uctx->ctx.u.perf_counter.type |
642 | != ctx->u.perf_counter.type) { | |
643 | return 0; | |
644 | } | |
645 | if (uctx->ctx.u.perf_counter.config | |
646 | != ctx->u.perf_counter.config) { | |
647 | return 0; | |
648 | } | |
649 | if (strncmp(uctx->ctx.u.perf_counter.name, | |
650 | ctx->u.perf_counter.name, | |
fc4b93fa | 651 | LTTNG_UST_ABI_SYM_NAME_LEN)) { |
aa3514e9 MD |
652 | return 0; |
653 | } | |
654 | break; | |
fc4b93fa | 655 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
a0377dfe FD |
656 | LTTNG_ASSERT(uctx->ctx.u.app_ctx.provider_name); |
657 | LTTNG_ASSERT(uctx->ctx.u.app_ctx.ctx_name); | |
54fb33cf JG |
658 | if (strcmp(uctx->ctx.u.app_ctx.provider_name, |
659 | ctx->u.app_ctx.provider_name) || | |
660 | strcmp(uctx->ctx.u.app_ctx.ctx_name, | |
661 | ctx->u.app_ctx.ctx_name)) { | |
662 | return 0; | |
663 | } | |
aa3514e9 MD |
664 | default: |
665 | break; | |
666 | ||
667 | } | |
668 | return 1; | |
669 | } | |
670 | ||
671 | /* | |
672 | * Allocate and initialize an UST context. | |
673 | * | |
674 | * Return pointer to structure or NULL. | |
675 | */ | |
676 | struct ltt_ust_context *trace_ust_create_context( | |
df4f5a87 | 677 | const struct lttng_event_context *ctx) |
aa3514e9 | 678 | { |
bdf64013 | 679 | struct ltt_ust_context *uctx = NULL; |
aa3514e9 MD |
680 | int utype; |
681 | ||
a0377dfe | 682 | LTTNG_ASSERT(ctx); |
aa3514e9 MD |
683 | |
684 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
685 | if (utype < 0) { | |
1cf992b8 | 686 | ERR("Invalid UST context"); |
bdf64013 | 687 | goto end; |
9197c5c4 | 688 | } |
55cc08a6 | 689 | |
64803277 | 690 | uctx = zmalloc<ltt_ust_context>(); |
bdf64013 | 691 | if (!uctx) { |
55cc08a6 | 692 | PERROR("zmalloc ltt_ust_context"); |
bdf64013 | 693 | goto end; |
55cc08a6 DG |
694 | } |
695 | ||
fc4b93fa | 696 | uctx->ctx.ctx = (enum lttng_ust_abi_context_type) utype; |
aa3514e9 | 697 | switch (utype) { |
fc4b93fa | 698 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
aa3514e9 MD |
699 | uctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; |
700 | uctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
701 | strncpy(uctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
fc4b93fa MD |
702 | LTTNG_UST_ABI_SYM_NAME_LEN); |
703 | uctx->ctx.u.perf_counter.name[LTTNG_UST_ABI_SYM_NAME_LEN - 1] = '\0'; | |
aa3514e9 | 704 | break; |
fc4b93fa | 705 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
bdf64013 JG |
706 | { |
707 | char *provider_name = NULL, *ctx_name = NULL; | |
708 | ||
709 | provider_name = strdup(ctx->u.app_ctx.provider_name); | |
710 | if (!provider_name) { | |
711 | goto error; | |
712 | } | |
713 | uctx->ctx.u.app_ctx.provider_name = provider_name; | |
714 | ||
715 | ctx_name = strdup(ctx->u.app_ctx.ctx_name); | |
716 | if (!ctx_name) { | |
717 | goto error; | |
718 | } | |
719 | uctx->ctx.u.app_ctx.ctx_name = ctx_name; | |
720 | break; | |
721 | } | |
aa3514e9 MD |
722 | default: |
723 | break; | |
724 | } | |
bec39940 | 725 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
bdf64013 | 726 | end: |
55cc08a6 | 727 | return uctx; |
55cc08a6 | 728 | error: |
bdf64013 | 729 | trace_ust_destroy_context(uctx); |
55cc08a6 DG |
730 | return NULL; |
731 | } | |
732 | ||
55c9e7ca | 733 | static void destroy_id_tracker_node_rcu(struct rcu_head *head) |
a9ad0c8f | 734 | { |
55c9e7ca JR |
735 | struct ust_id_tracker_node *tracker_node = caa_container_of( |
736 | head, struct ust_id_tracker_node, node.head); | |
a9ad0c8f MD |
737 | free(tracker_node); |
738 | } | |
739 | ||
55c9e7ca | 740 | static void destroy_id_tracker_node(struct ust_id_tracker_node *tracker_node) |
a9ad0c8f | 741 | { |
55c9e7ca | 742 | call_rcu(&tracker_node->node.head, destroy_id_tracker_node_rcu); |
a9ad0c8f MD |
743 | } |
744 | ||
55c9e7ca | 745 | static int init_id_tracker(struct ust_id_tracker *id_tracker) |
a9ad0c8f | 746 | { |
55c9e7ca | 747 | int ret = LTTNG_OK; |
a9ad0c8f | 748 | |
55c9e7ca JR |
749 | id_tracker->ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); |
750 | if (!id_tracker->ht) { | |
751 | ret = LTTNG_ERR_NOMEM; | |
a9ad0c8f MD |
752 | goto end; |
753 | } | |
754 | ||
755 | end: | |
756 | return ret; | |
757 | } | |
758 | ||
759 | /* | |
55c9e7ca | 760 | * Teardown id tracker content, but don't free id_tracker object. |
a9ad0c8f | 761 | */ |
55c9e7ca | 762 | static void fini_id_tracker(struct ust_id_tracker *id_tracker) |
a9ad0c8f | 763 | { |
55c9e7ca | 764 | struct ust_id_tracker_node *tracker_node; |
a9ad0c8f MD |
765 | struct lttng_ht_iter iter; |
766 | ||
55c9e7ca | 767 | if (!id_tracker->ht) { |
a9ad0c8f MD |
768 | return; |
769 | } | |
770 | rcu_read_lock(); | |
55c9e7ca JR |
771 | cds_lfht_for_each_entry (id_tracker->ht->ht, &iter.iter, tracker_node, |
772 | node.node) { | |
773 | int ret = lttng_ht_del(id_tracker->ht, &iter); | |
a9ad0c8f | 774 | |
a0377dfe | 775 | LTTNG_ASSERT(!ret); |
55c9e7ca | 776 | destroy_id_tracker_node(tracker_node); |
a9ad0c8f MD |
777 | } |
778 | rcu_read_unlock(); | |
3c339053 | 779 | lttng_ht_destroy(id_tracker->ht); |
55c9e7ca | 780 | id_tracker->ht = NULL; |
a9ad0c8f MD |
781 | } |
782 | ||
55c9e7ca JR |
783 | static struct ust_id_tracker_node *id_tracker_lookup( |
784 | struct ust_id_tracker *id_tracker, | |
785 | int id, | |
a9ad0c8f MD |
786 | struct lttng_ht_iter *iter) |
787 | { | |
55c9e7ca | 788 | unsigned long _id = (unsigned long) id; |
a9ad0c8f MD |
789 | struct lttng_ht_node_ulong *node; |
790 | ||
55c9e7ca | 791 | lttng_ht_lookup(id_tracker->ht, (void *) _id, iter); |
a9ad0c8f MD |
792 | node = lttng_ht_iter_get_node_ulong(iter); |
793 | if (node) { | |
55c9e7ca | 794 | return caa_container_of(node, struct ust_id_tracker_node, node); |
a9ad0c8f MD |
795 | } else { |
796 | return NULL; | |
797 | } | |
798 | } | |
799 | ||
55c9e7ca | 800 | static int id_tracker_add_id(struct ust_id_tracker *id_tracker, int id) |
a9ad0c8f MD |
801 | { |
802 | int retval = LTTNG_OK; | |
55c9e7ca | 803 | struct ust_id_tracker_node *tracker_node; |
a9ad0c8f MD |
804 | struct lttng_ht_iter iter; |
805 | ||
55c9e7ca | 806 | if (id < 0) { |
a9ad0c8f MD |
807 | retval = LTTNG_ERR_INVALID; |
808 | goto end; | |
809 | } | |
55c9e7ca | 810 | tracker_node = id_tracker_lookup(id_tracker, id, &iter); |
a9ad0c8f MD |
811 | if (tracker_node) { |
812 | /* Already exists. */ | |
159b042f | 813 | retval = LTTNG_ERR_PROCESS_ATTR_EXISTS; |
a9ad0c8f MD |
814 | goto end; |
815 | } | |
64803277 | 816 | tracker_node = zmalloc<ust_id_tracker_node>(); |
a9ad0c8f MD |
817 | if (!tracker_node) { |
818 | retval = LTTNG_ERR_NOMEM; | |
819 | goto end; | |
820 | } | |
55c9e7ca JR |
821 | lttng_ht_node_init_ulong(&tracker_node->node, (unsigned long) id); |
822 | lttng_ht_add_unique_ulong(id_tracker->ht, &tracker_node->node); | |
a9ad0c8f MD |
823 | end: |
824 | return retval; | |
825 | } | |
826 | ||
55c9e7ca | 827 | static int id_tracker_del_id(struct ust_id_tracker *id_tracker, int id) |
a9ad0c8f MD |
828 | { |
829 | int retval = LTTNG_OK, ret; | |
55c9e7ca | 830 | struct ust_id_tracker_node *tracker_node; |
a9ad0c8f MD |
831 | struct lttng_ht_iter iter; |
832 | ||
55c9e7ca | 833 | if (id < 0) { |
a9ad0c8f MD |
834 | retval = LTTNG_ERR_INVALID; |
835 | goto end; | |
836 | } | |
55c9e7ca | 837 | tracker_node = id_tracker_lookup(id_tracker, id, &iter); |
a9ad0c8f MD |
838 | if (!tracker_node) { |
839 | /* Not found */ | |
159b042f | 840 | retval = LTTNG_ERR_PROCESS_ATTR_MISSING; |
a9ad0c8f MD |
841 | goto end; |
842 | } | |
55c9e7ca | 843 | ret = lttng_ht_del(id_tracker->ht, &iter); |
a0377dfe | 844 | LTTNG_ASSERT(!ret); |
a9ad0c8f | 845 | |
55c9e7ca | 846 | destroy_id_tracker_node(tracker_node); |
a9ad0c8f MD |
847 | end: |
848 | return retval; | |
849 | } | |
850 | ||
55c9e7ca | 851 | static struct ust_id_tracker *get_id_tracker(struct ltt_ust_session *session, |
159b042f | 852 | enum lttng_process_attr process_attr) |
55c9e7ca | 853 | { |
159b042f JG |
854 | switch (process_attr) { |
855 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: | |
55c9e7ca | 856 | return &session->vpid_tracker; |
159b042f | 857 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: |
55c9e7ca | 858 | return &session->vuid_tracker; |
159b042f | 859 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: |
55c9e7ca JR |
860 | return &session->vgid_tracker; |
861 | default: | |
862 | return NULL; | |
863 | } | |
864 | } | |
865 | ||
159b042f | 866 | static struct process_attr_tracker *_trace_ust_get_process_attr_tracker( |
55c9e7ca | 867 | struct ltt_ust_session *session, |
159b042f | 868 | enum lttng_process_attr process_attr) |
55c9e7ca | 869 | { |
159b042f JG |
870 | switch (process_attr) { |
871 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: | |
872 | return session->tracker_vpid; | |
873 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: | |
874 | return session->tracker_vuid; | |
875 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: | |
876 | return session->tracker_vgid; | |
55c9e7ca JR |
877 | default: |
878 | return NULL; | |
879 | } | |
880 | } | |
881 | ||
159b042f JG |
882 | const struct process_attr_tracker *trace_ust_get_process_attr_tracker( |
883 | struct ltt_ust_session *session, | |
884 | enum lttng_process_attr process_attr) | |
885 | { | |
886 | return (const struct process_attr_tracker *) | |
887 | _trace_ust_get_process_attr_tracker( | |
888 | session, process_attr); | |
889 | } | |
890 | ||
a9ad0c8f MD |
891 | /* |
892 | * The session lock is held when calling this function. | |
893 | */ | |
159b042f | 894 | int trace_ust_id_tracker_lookup(enum lttng_process_attr process_attr, |
55c9e7ca JR |
895 | struct ltt_ust_session *session, |
896 | int id) | |
a9ad0c8f MD |
897 | { |
898 | struct lttng_ht_iter iter; | |
55c9e7ca | 899 | struct ust_id_tracker *id_tracker; |
a9ad0c8f | 900 | |
159b042f | 901 | id_tracker = get_id_tracker(session, process_attr); |
55c9e7ca JR |
902 | if (!id_tracker) { |
903 | abort(); | |
904 | } | |
905 | if (!id_tracker->ht) { | |
a9ad0c8f MD |
906 | return 1; |
907 | } | |
55c9e7ca | 908 | if (id_tracker_lookup(id_tracker, id, &iter)) { |
a9ad0c8f MD |
909 | return 1; |
910 | } | |
911 | return 0; | |
912 | } | |
913 | ||
914 | /* | |
915 | * Called with the session lock held. | |
916 | */ | |
159b042f | 917 | enum lttng_error_code trace_ust_process_attr_tracker_set_tracking_policy( |
55c9e7ca | 918 | struct ltt_ust_session *session, |
159b042f JG |
919 | enum lttng_process_attr process_attr, |
920 | enum lttng_tracking_policy policy) | |
a9ad0c8f | 921 | { |
159b042f JG |
922 | int ret; |
923 | enum lttng_error_code ret_code = LTTNG_OK; | |
924 | struct ust_id_tracker *id_tracker = | |
925 | get_id_tracker(session, process_attr); | |
926 | struct process_attr_tracker *tracker = | |
927 | _trace_ust_get_process_attr_tracker( | |
928 | session, process_attr); | |
88e3c2f5 | 929 | bool should_update_apps = false; |
159b042f | 930 | enum lttng_tracking_policy previous_policy; |
55c9e7ca | 931 | |
159b042f JG |
932 | if (!tracker) { |
933 | ret_code = LTTNG_ERR_INVALID; | |
934 | goto end; | |
55c9e7ca | 935 | } |
a9ad0c8f | 936 | |
159b042f JG |
937 | previous_policy = process_attr_tracker_get_tracking_policy(tracker); |
938 | ret = process_attr_tracker_set_tracking_policy(tracker, policy); | |
939 | if (ret) { | |
940 | ret_code = LTTNG_ERR_UNK; | |
55c9e7ca JR |
941 | goto end; |
942 | } | |
943 | ||
159b042f JG |
944 | if (previous_policy == policy) { |
945 | goto end; | |
55c9e7ca | 946 | } |
159b042f JG |
947 | |
948 | switch (policy) { | |
949 | case LTTNG_TRACKING_POLICY_INCLUDE_ALL: | |
950 | /* Track all values: destroy tracker if exists. */ | |
55c9e7ca JR |
951 | if (id_tracker->ht) { |
952 | fini_id_tracker(id_tracker); | |
a9ad0c8f | 953 | /* Ensure all apps have session. */ |
88e3c2f5 | 954 | should_update_apps = true; |
a9ad0c8f | 955 | } |
159b042f JG |
956 | break; |
957 | case LTTNG_TRACKING_POLICY_EXCLUDE_ALL: | |
958 | case LTTNG_TRACKING_POLICY_INCLUDE_SET: | |
959 | /* fall-through. */ | |
960 | fini_id_tracker(id_tracker); | |
7966af57 | 961 | ret_code = (lttng_error_code) init_id_tracker(id_tracker); |
159b042f JG |
962 | if (ret_code != LTTNG_OK) { |
963 | ERR("Error initializing ID tracker"); | |
964 | goto end; | |
a9ad0c8f | 965 | } |
159b042f JG |
966 | /* Remove all apps from session. */ |
967 | should_update_apps = true; | |
968 | break; | |
969 | default: | |
970 | abort(); | |
a9ad0c8f | 971 | } |
88e3c2f5 JG |
972 | if (should_update_apps && session->active) { |
973 | ust_app_global_update_all(session); | |
974 | } | |
a9ad0c8f | 975 | end: |
159b042f | 976 | return ret_code; |
a9ad0c8f MD |
977 | } |
978 | ||
159b042f JG |
979 | /* Called with the session lock held. */ |
980 | enum lttng_error_code trace_ust_process_attr_tracker_inclusion_set_add_value( | |
55c9e7ca | 981 | struct ltt_ust_session *session, |
159b042f JG |
982 | enum lttng_process_attr process_attr, |
983 | const struct process_attr_value *value) | |
a9ad0c8f | 984 | { |
159b042f | 985 | enum lttng_error_code ret_code = LTTNG_OK; |
a5a30920 | 986 | bool should_update_apps = false; |
159b042f JG |
987 | struct ust_id_tracker *id_tracker = |
988 | get_id_tracker(session, process_attr); | |
989 | struct process_attr_tracker *tracker; | |
990 | int integral_value; | |
991 | enum process_attr_tracker_status status; | |
992 | struct ust_app *app; | |
55c9e7ca | 993 | |
159b042f JG |
994 | /* |
995 | * Convert process attribute tracker value to the integral | |
996 | * representation required by the kern-ctl API. | |
997 | */ | |
998 | switch (process_attr) { | |
999 | case LTTNG_PROCESS_ATTR_PROCESS_ID: | |
1000 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: | |
1001 | integral_value = (int) value->value.pid; | |
1002 | break; | |
1003 | case LTTNG_PROCESS_ATTR_USER_ID: | |
1004 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: | |
1005 | if (value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME) { | |
1006 | uid_t uid; | |
1007 | ||
1008 | ret_code = utils_user_id_from_name( | |
1009 | value->value.user_name, &uid); | |
1010 | if (ret_code != LTTNG_OK) { | |
1011 | goto end; | |
1012 | } | |
1013 | integral_value = (int) uid; | |
1014 | } else { | |
1015 | integral_value = (int) value->value.uid; | |
1016 | } | |
1017 | break; | |
1018 | case LTTNG_PROCESS_ATTR_GROUP_ID: | |
1019 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: | |
1020 | if (value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME) { | |
1021 | gid_t gid; | |
1022 | ||
1023 | ret_code = utils_group_id_from_name( | |
1024 | value->value.group_name, &gid); | |
1025 | if (ret_code != LTTNG_OK) { | |
1026 | goto end; | |
1027 | } | |
1028 | integral_value = (int) gid; | |
1029 | } else { | |
1030 | integral_value = (int) value->value.gid; | |
1031 | } | |
1032 | break; | |
1033 | default: | |
1034 | ret_code = LTTNG_ERR_INVALID; | |
55c9e7ca JR |
1035 | goto end; |
1036 | } | |
a9ad0c8f | 1037 | |
159b042f JG |
1038 | tracker = _trace_ust_get_process_attr_tracker(session, process_attr); |
1039 | if (!tracker) { | |
1040 | ret_code = LTTNG_ERR_INVALID; | |
74675e31 | 1041 | goto end; |
55c9e7ca JR |
1042 | } |
1043 | ||
159b042f JG |
1044 | status = process_attr_tracker_inclusion_set_add_value(tracker, value); |
1045 | if (status != PROCESS_ATTR_TRACKER_STATUS_OK) { | |
1046 | switch (status) { | |
1047 | case PROCESS_ATTR_TRACKER_STATUS_EXISTS: | |
1048 | ret_code = LTTNG_ERR_PROCESS_ATTR_EXISTS; | |
1049 | break; | |
1050 | case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY: | |
1051 | ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY; | |
1052 | break; | |
1053 | case PROCESS_ATTR_TRACKER_STATUS_ERROR: | |
1054 | default: | |
1055 | ret_code = LTTNG_ERR_UNK; | |
1056 | break; | |
a9ad0c8f | 1057 | } |
159b042f JG |
1058 | goto end; |
1059 | } | |
a9ad0c8f | 1060 | |
159b042f JG |
1061 | DBG("User space track %s %d for session id %" PRIu64, |
1062 | lttng_process_attr_to_string(process_attr), | |
1063 | integral_value, session->id); | |
a9ad0c8f | 1064 | |
7966af57 | 1065 | ret_code = (lttng_error_code) id_tracker_add_id(id_tracker, integral_value); |
159b042f JG |
1066 | if (ret_code != LTTNG_OK) { |
1067 | goto end; | |
1068 | } | |
1069 | /* Add session to application */ | |
1070 | switch (process_attr) { | |
1071 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: | |
1072 | app = ust_app_find_by_pid(integral_value); | |
1073 | if (app) { | |
a5a30920 | 1074 | should_update_apps = true; |
a9ad0c8f | 1075 | } |
159b042f JG |
1076 | break; |
1077 | default: | |
1078 | should_update_apps = true; | |
1079 | break; | |
a9ad0c8f | 1080 | } |
a5a30920 JR |
1081 | if (should_update_apps && session->active) { |
1082 | ust_app_global_update_all(session); | |
1083 | } | |
a9ad0c8f | 1084 | end: |
159b042f | 1085 | return ret_code; |
a9ad0c8f MD |
1086 | } |
1087 | ||
159b042f JG |
1088 | /* Called with the session lock held. */ |
1089 | enum lttng_error_code trace_ust_process_attr_tracker_inclusion_set_remove_value( | |
55c9e7ca | 1090 | struct ltt_ust_session *session, |
159b042f JG |
1091 | enum lttng_process_attr process_attr, |
1092 | const struct process_attr_value *value) | |
a5dfbb9d | 1093 | { |
159b042f JG |
1094 | enum lttng_error_code ret_code = LTTNG_OK; |
1095 | bool should_update_apps = false; | |
1096 | struct ust_id_tracker *id_tracker = | |
1097 | get_id_tracker(session, process_attr); | |
1098 | struct process_attr_tracker *tracker; | |
1099 | int integral_value; | |
1100 | enum process_attr_tracker_status status; | |
1101 | struct ust_app *app; | |
a5dfbb9d | 1102 | |
159b042f JG |
1103 | /* |
1104 | * Convert process attribute tracker value to the integral | |
1105 | * representation required by the kern-ctl API. | |
1106 | */ | |
1107 | switch (process_attr) { | |
1108 | case LTTNG_PROCESS_ATTR_PROCESS_ID: | |
1109 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: | |
1110 | integral_value = (int) value->value.pid; | |
1111 | break; | |
1112 | case LTTNG_PROCESS_ATTR_USER_ID: | |
1113 | case LTTNG_PROCESS_ATTR_VIRTUAL_USER_ID: | |
1114 | if (value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_USER_NAME) { | |
1115 | uid_t uid; | |
1116 | ||
1117 | ret_code = utils_user_id_from_name( | |
1118 | value->value.user_name, &uid); | |
1119 | if (ret_code != LTTNG_OK) { | |
1120 | goto end; | |
1121 | } | |
1122 | integral_value = (int) uid; | |
1123 | } else { | |
1124 | integral_value = (int) value->value.uid; | |
1125 | } | |
1126 | break; | |
1127 | case LTTNG_PROCESS_ATTR_GROUP_ID: | |
1128 | case LTTNG_PROCESS_ATTR_VIRTUAL_GROUP_ID: | |
1129 | if (value->type == LTTNG_PROCESS_ATTR_VALUE_TYPE_GROUP_NAME) { | |
1130 | gid_t gid; | |
1131 | ||
1132 | ret_code = utils_group_id_from_name( | |
1133 | value->value.group_name, &gid); | |
1134 | if (ret_code != LTTNG_OK) { | |
1135 | goto end; | |
1136 | } | |
1137 | integral_value = (int) gid; | |
1138 | } else { | |
1139 | integral_value = (int) value->value.gid; | |
1140 | } | |
1141 | break; | |
1142 | default: | |
1143 | ret_code = LTTNG_ERR_INVALID; | |
1144 | goto end; | |
a5dfbb9d MD |
1145 | } |
1146 | ||
159b042f JG |
1147 | tracker = _trace_ust_get_process_attr_tracker(session, process_attr); |
1148 | if (!tracker) { | |
1149 | ret_code = LTTNG_ERR_INVALID; | |
74675e31 | 1150 | goto end; |
159b042f JG |
1151 | } |
1152 | ||
1153 | status = process_attr_tracker_inclusion_set_remove_value( | |
1154 | tracker, value); | |
1155 | if (status != PROCESS_ATTR_TRACKER_STATUS_OK) { | |
1156 | switch (status) { | |
1157 | case PROCESS_ATTR_TRACKER_STATUS_MISSING: | |
1158 | ret_code = LTTNG_ERR_PROCESS_ATTR_MISSING; | |
1159 | break; | |
1160 | case PROCESS_ATTR_TRACKER_STATUS_INVALID_TRACKING_POLICY: | |
1161 | ret_code = LTTNG_ERR_PROCESS_ATTR_TRACKER_INVALID_TRACKING_POLICY; | |
1162 | break; | |
1163 | case PROCESS_ATTR_TRACKER_STATUS_ERROR: | |
1164 | default: | |
1165 | ret_code = LTTNG_ERR_UNK; | |
1166 | break; | |
1167 | } | |
a7a533cd | 1168 | goto end; |
a5dfbb9d | 1169 | } |
a7a533cd | 1170 | |
159b042f JG |
1171 | DBG("User space untrack %s %d for session id %" PRIu64, |
1172 | lttng_process_attr_to_string(process_attr), | |
1173 | integral_value, session->id); | |
1174 | ||
7966af57 | 1175 | ret_code = (lttng_error_code) id_tracker_del_id(id_tracker, integral_value); |
159b042f | 1176 | if (ret_code != LTTNG_OK) { |
a7a533cd JR |
1177 | goto end; |
1178 | } | |
159b042f JG |
1179 | /* Add session to application */ |
1180 | switch (process_attr) { | |
1181 | case LTTNG_PROCESS_ATTR_VIRTUAL_PROCESS_ID: | |
1182 | app = ust_app_find_by_pid(integral_value); | |
1183 | if (app) { | |
1184 | should_update_apps = true; | |
1185 | } | |
1186 | break; | |
1187 | default: | |
1188 | should_update_apps = true; | |
1189 | break; | |
1190 | } | |
1191 | if (should_update_apps && session->active) { | |
1192 | ust_app_global_update_all(session); | |
1193 | } | |
a7a533cd | 1194 | end: |
159b042f | 1195 | return ret_code; |
a5dfbb9d MD |
1196 | } |
1197 | ||
f6a9efaa DG |
1198 | /* |
1199 | * RCU safe free context structure. | |
1200 | */ | |
1201 | static void destroy_context_rcu(struct rcu_head *head) | |
1202 | { | |
bec39940 DG |
1203 | struct lttng_ht_node_ulong *node = |
1204 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
1205 | struct ltt_ust_context *ctx = |
1206 | caa_container_of(node, struct ltt_ust_context, node); | |
1207 | ||
bdf64013 | 1208 | trace_ust_destroy_context(ctx); |
f6a9efaa DG |
1209 | } |
1210 | ||
1211 | /* | |
1212 | * Cleanup UST context hash table. | |
1213 | */ | |
7bd39047 | 1214 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
1215 | { |
1216 | int ret; | |
bec39940 DG |
1217 | struct lttng_ht_node_ulong *node; |
1218 | struct lttng_ht_iter iter; | |
31746f93 | 1219 | struct ltt_ust_context *ctx; |
f6a9efaa | 1220 | |
a0377dfe | 1221 | LTTNG_ASSERT(ht); |
0525e9ae | 1222 | |
36b588ed | 1223 | rcu_read_lock(); |
bec39940 | 1224 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
31746f93 DG |
1225 | /* Remove from ordered list. */ |
1226 | ctx = caa_container_of(node, struct ltt_ust_context, node); | |
1227 | cds_list_del(&ctx->list); | |
1228 | /* Remove from channel's hash table. */ | |
bec39940 | 1229 | ret = lttng_ht_del(ht, &iter); |
f6a9efaa DG |
1230 | if (!ret) { |
1231 | call_rcu(&node->head, destroy_context_rcu); | |
1232 | } | |
f6a9efaa | 1233 | } |
36b588ed | 1234 | rcu_read_unlock(); |
ed52805d | 1235 | |
3c339053 | 1236 | lttng_ht_destroy(ht); |
f6a9efaa DG |
1237 | } |
1238 | ||
97ee3a89 DG |
1239 | /* |
1240 | * Cleanup ust event structure. | |
1241 | */ | |
1242 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
1243 | { | |
a0377dfe | 1244 | LTTNG_ASSERT(event); |
0525e9ae | 1245 | |
f6a9efaa | 1246 | DBG2("Trace destroy UST event %s", event->attr.name); |
6b453b5e | 1247 | free(event->filter_expression); |
53a80697 | 1248 | free(event->filter); |
40024f8a | 1249 | free(event->exclusion); |
97ee3a89 DG |
1250 | free(event); |
1251 | } | |
1252 | ||
bdf64013 JG |
1253 | /* |
1254 | * Cleanup ust context structure. | |
1255 | */ | |
1256 | void trace_ust_destroy_context(struct ltt_ust_context *ctx) | |
1257 | { | |
a0377dfe | 1258 | LTTNG_ASSERT(ctx); |
bdf64013 | 1259 | |
fc4b93fa | 1260 | if (ctx->ctx.ctx == LTTNG_UST_ABI_CONTEXT_APP_CONTEXT) { |
bdf64013 JG |
1261 | free(ctx->ctx.u.app_ctx.provider_name); |
1262 | free(ctx->ctx.u.app_ctx.ctx_name); | |
1263 | } | |
1264 | free(ctx); | |
1265 | } | |
1266 | ||
f6a9efaa DG |
1267 | /* |
1268 | * URCU intermediate call to complete destroy event. | |
1269 | */ | |
1270 | static void destroy_event_rcu(struct rcu_head *head) | |
1271 | { | |
bec39940 DG |
1272 | struct lttng_ht_node_str *node = |
1273 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
1274 | struct ltt_ust_event *event = |
1275 | caa_container_of(node, struct ltt_ust_event, node); | |
1276 | ||
1277 | trace_ust_destroy_event(event); | |
1278 | } | |
1279 | ||
284d8f55 DG |
1280 | /* |
1281 | * Cleanup UST events hashtable. | |
1282 | */ | |
7bd39047 | 1283 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
1284 | { |
1285 | int ret; | |
bec39940 DG |
1286 | struct lttng_ht_node_str *node; |
1287 | struct lttng_ht_iter iter; | |
ed52805d | 1288 | |
a0377dfe | 1289 | LTTNG_ASSERT(events); |
0525e9ae | 1290 | |
36b588ed | 1291 | rcu_read_lock(); |
bec39940 DG |
1292 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
1293 | ret = lttng_ht_del(events, &iter); | |
a0377dfe | 1294 | LTTNG_ASSERT(!ret); |
7bd39047 | 1295 | call_rcu(&node->head, destroy_event_rcu); |
ed52805d | 1296 | } |
36b588ed | 1297 | rcu_read_unlock(); |
ed52805d | 1298 | |
3c339053 | 1299 | lttng_ht_destroy(events); |
ed52805d DG |
1300 | } |
1301 | ||
97ee3a89 DG |
1302 | /* |
1303 | * Cleanup ust channel structure. | |
36b588ed MD |
1304 | * |
1305 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 1306 | */ |
36b588ed | 1307 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 1308 | { |
a0377dfe | 1309 | LTTNG_ASSERT(channel); |
0525e9ae | 1310 | |
f6a9efaa | 1311 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 1312 | |
97ee3a89 | 1313 | free(channel); |
f6a9efaa DG |
1314 | } |
1315 | ||
1316 | /* | |
1317 | * URCU intermediate call to complete destroy channel. | |
1318 | */ | |
1319 | static void destroy_channel_rcu(struct rcu_head *head) | |
1320 | { | |
bec39940 DG |
1321 | struct lttng_ht_node_str *node = |
1322 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
1323 | struct ltt_ust_channel *channel = |
1324 | caa_container_of(node, struct ltt_ust_channel, node); | |
1325 | ||
36b588ed MD |
1326 | _trace_ust_destroy_channel(channel); |
1327 | } | |
1328 | ||
1329 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
1330 | { | |
627cbbe7 MD |
1331 | /* Destroying all events of the channel */ |
1332 | destroy_events(channel->events); | |
1333 | /* Destroying all context of the channel */ | |
1334 | destroy_contexts(channel->ctx); | |
1335 | ||
36b588ed | 1336 | call_rcu(&channel->node.head, destroy_channel_rcu); |
97ee3a89 DG |
1337 | } |
1338 | ||
d5979e4a DG |
1339 | /* |
1340 | * Remove an UST channel from a channel HT. | |
1341 | */ | |
1342 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
1343 | struct ltt_ust_channel *channel) | |
1344 | { | |
1345 | int ret; | |
1346 | struct lttng_ht_iter iter; | |
1347 | ||
a0377dfe FD |
1348 | LTTNG_ASSERT(ht); |
1349 | LTTNG_ASSERT(channel); | |
d5979e4a DG |
1350 | |
1351 | iter.iter.node = &channel->node.node; | |
1352 | ret = lttng_ht_del(ht, &iter); | |
a0377dfe | 1353 | LTTNG_ASSERT(!ret); |
d5979e4a DG |
1354 | } |
1355 | ||
97ee3a89 | 1356 | /* |
f6a9efaa | 1357 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 1358 | */ |
bec39940 | 1359 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa | 1360 | { |
bec39940 DG |
1361 | struct lttng_ht_node_str *node; |
1362 | struct lttng_ht_iter iter; | |
f6a9efaa | 1363 | |
a0377dfe | 1364 | LTTNG_ASSERT(channels); |
0525e9ae | 1365 | |
24d1723f | 1366 | rcu_read_lock(); |
bec39940 | 1367 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
627cbbe7 MD |
1368 | struct ltt_ust_channel *chan = |
1369 | caa_container_of(node, struct ltt_ust_channel, node); | |
1370 | ||
1371 | trace_ust_delete_channel(channels, chan); | |
1372 | trace_ust_destroy_channel(chan); | |
f6a9efaa | 1373 | } |
36b588ed | 1374 | rcu_read_unlock(); |
ed52805d | 1375 | |
3c339053 | 1376 | lttng_ht_destroy(channels); |
f6a9efaa DG |
1377 | } |
1378 | ||
f6a9efaa DG |
1379 | /* |
1380 | * Cleanup UST global domain. | |
1381 | */ | |
1382 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
1383 | { | |
a0377dfe | 1384 | LTTNG_ASSERT(dom); |
0525e9ae | 1385 | |
f6a9efaa DG |
1386 | destroy_channels(dom->channels); |
1387 | } | |
97ee3a89 | 1388 | |
f6a9efaa | 1389 | /* |
d070c424 MD |
1390 | * Cleanup ust session structure, keeping data required by |
1391 | * destroy notifier. | |
f6a9efaa DG |
1392 | */ |
1393 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
1394 | { | |
fefd409b | 1395 | struct agent *agt; |
7972aab2 | 1396 | struct buffer_reg_uid *reg, *sreg; |
fefd409b | 1397 | struct lttng_ht_iter iter; |
7972aab2 | 1398 | |
a0377dfe | 1399 | LTTNG_ASSERT(session); |
97ee3a89 | 1400 | |
d9bf3ca4 | 1401 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 1402 | |
f6a9efaa DG |
1403 | /* Cleaning up UST domain */ |
1404 | destroy_domain_global(&session->domain_global); | |
fefd409b | 1405 | |
0c0fcd77 | 1406 | rcu_read_lock(); |
fefd409b | 1407 | cds_lfht_for_each_entry(session->agents->ht, &iter.iter, agt, node.node) { |
d0edf546 JG |
1408 | int ret = lttng_ht_del(session->agents, &iter); |
1409 | ||
a0377dfe | 1410 | LTTNG_ASSERT(!ret); |
fefd409b DG |
1411 | agent_destroy(agt); |
1412 | } | |
0c0fcd77 | 1413 | rcu_read_unlock(); |
7972aab2 | 1414 | |
3c339053 | 1415 | lttng_ht_destroy(session->agents); |
8ada2175 | 1416 | |
7972aab2 DG |
1417 | /* Cleanup UID buffer registry object(s). */ |
1418 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
1419 | lnode) { | |
1420 | cds_list_del(®->lnode); | |
1421 | buffer_reg_uid_remove(reg); | |
1422 | buffer_reg_uid_destroy(reg, session->consumer); | |
1423 | } | |
44d3bd01 | 1424 | |
159b042f JG |
1425 | process_attr_tracker_destroy(session->tracker_vpid); |
1426 | process_attr_tracker_destroy(session->tracker_vuid); | |
1427 | process_attr_tracker_destroy(session->tracker_vgid); | |
55c9e7ca JR |
1428 | |
1429 | fini_id_tracker(&session->vpid_tracker); | |
1430 | fini_id_tracker(&session->vuid_tracker); | |
1431 | fini_id_tracker(&session->vgid_tracker); | |
82b69413 | 1432 | lttng_trace_chunk_put(session->current_trace_chunk); |
d070c424 MD |
1433 | } |
1434 | ||
1435 | /* Free elements needed by destroy notifiers. */ | |
1436 | void trace_ust_free_session(struct ltt_ust_session *session) | |
1437 | { | |
1438 | consumer_output_put(session->consumer); | |
97ee3a89 DG |
1439 | free(session); |
1440 | } |