Commit | Line | Data |
---|---|---|
97ee3a89 DG |
1 | /* |
2 | * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca> | |
3 | * | |
d14d33bf AM |
4 | * This program is free software; you can redistribute it and/or modify |
5 | * it under the terms of the GNU General Public License, version 2 only, | |
6 | * as published by the Free Software Foundation. | |
97ee3a89 | 7 | * |
d14d33bf AM |
8 | * This program is distributed in the hope that it will be useful, |
9 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
10 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
11 | * GNU General Public License for more details. | |
97ee3a89 | 12 | * |
d14d33bf AM |
13 | * You should have received a copy of the GNU General Public License along |
14 | * with this program; if not, write to the Free Software Foundation, Inc., | |
15 | * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA. | |
97ee3a89 DG |
16 | */ |
17 | ||
18 | #define _GNU_SOURCE | |
19 | #include <stdio.h> | |
20 | #include <stdlib.h> | |
21 | #include <string.h> | |
22 | #include <unistd.h> | |
d9bf3ca4 | 23 | #include <inttypes.h> |
97ee3a89 | 24 | |
990570ed DG |
25 | #include <common/common.h> |
26 | #include <common/defaults.h> | |
97ee3a89 | 27 | |
7972aab2 | 28 | #include "buffer-registry.h" |
97ee3a89 | 29 | #include "trace-ust.h" |
0b2dc8df | 30 | #include "utils.h" |
97ee3a89 | 31 | |
025faf73 DG |
32 | /* |
33 | * Match function for the events hash table lookup. | |
34 | * | |
35 | * Matches by name only. Used by the disable command. | |
36 | */ | |
18eace3b DG |
37 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
38 | const void *_key) | |
39 | { | |
40 | struct ltt_ust_event *event; | |
41 | const char *name; | |
42 | ||
43 | assert(node); | |
44 | assert(_key); | |
45 | ||
46 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
47 | name = _key; | |
48 | ||
49 | /* Event name */ | |
50 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
51 | goto no_match; | |
52 | } | |
53 | ||
025faf73 | 54 | /* Match */ |
18eace3b DG |
55 | return 1; |
56 | ||
57 | no_match: | |
58 | return 0; | |
59 | } | |
60 | ||
025faf73 DG |
61 | /* |
62 | * Match function for the hash table lookup. | |
63 | * | |
64 | * It matches an ust event based on three attributes which are the event name, | |
65 | * the filter bytecode and the loglevel. | |
66 | */ | |
18eace3b DG |
67 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
68 | { | |
69 | struct ltt_ust_event *event; | |
70 | const struct ltt_ust_ht_key *key; | |
71 | ||
72 | assert(node); | |
73 | assert(_key); | |
74 | ||
75 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
76 | key = _key; | |
77 | ||
f19e9f8b | 78 | /* Match the 4 elements of the key: name, filter, loglevel, exclusions. */ |
18eace3b DG |
79 | |
80 | /* Event name */ | |
81 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
82 | goto no_match; |
83 | } | |
84 | ||
85 | /* Event loglevel. */ | |
86 | if (event->attr.loglevel != key->loglevel) { | |
025faf73 DG |
87 | if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL |
88 | && key->loglevel == 0 && event->attr.loglevel == -1) { | |
18eace3b | 89 | /* |
025faf73 DG |
90 | * Match is accepted. This is because on event creation, the |
91 | * loglevel is set to -1 if the event loglevel type is ALL so 0 and | |
92 | * -1 are accepted for this loglevel type since 0 is the one set by | |
93 | * the API when receiving an enable event. | |
18eace3b DG |
94 | */ |
95 | } else { | |
18eace3b DG |
96 | goto no_match; |
97 | } | |
98 | } | |
99 | ||
100 | /* Only one of the filters is NULL, fail. */ | |
101 | if ((key->filter && !event->filter) || (!key->filter && event->filter)) { | |
18eace3b DG |
102 | goto no_match; |
103 | } | |
104 | ||
025faf73 DG |
105 | if (key->filter && event->filter) { |
106 | /* Both filters exists, check length followed by the bytecode. */ | |
107 | if (event->filter->len != key->filter->len || | |
108 | memcmp(event->filter->data, key->filter->data, | |
109 | event->filter->len) != 0) { | |
110 | goto no_match; | |
111 | } | |
18eace3b DG |
112 | } |
113 | ||
f19e9f8b JI |
114 | /* If only one of the exclusions is NULL, fail. */ |
115 | if ((key->exclusion && !event->exclusion) || (!key->exclusion && event->exclusion)) { | |
116 | goto no_match; | |
117 | } | |
118 | ||
119 | if (key->exclusion && event->exclusion) { | |
120 | /* Both exclusions exist; check count followed by names. */ | |
121 | if (event->exclusion->count != key->exclusion->count || | |
122 | memcmp(event->exclusion->names, key->exclusion->names, | |
123 | event->exclusion->count * LTTNG_SYMBOL_NAME_LEN) != 0) { | |
124 | goto no_match; | |
125 | } | |
126 | } | |
025faf73 DG |
127 | /* Match. */ |
128 | return 1; | |
18eace3b DG |
129 | |
130 | no_match: | |
131 | return 0; | |
18eace3b DG |
132 | } |
133 | ||
0177d773 | 134 | /* |
2223c96f DG |
135 | * Find the channel in the hashtable and return channel pointer. RCU read side |
136 | * lock MUST be acquired before calling this. | |
0177d773 | 137 | */ |
bec39940 | 138 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 139 | char *name) |
0177d773 | 140 | { |
bec39940 DG |
141 | struct lttng_ht_node_str *node; |
142 | struct lttng_ht_iter iter; | |
0177d773 | 143 | |
85076754 MD |
144 | /* |
145 | * If we receive an empty string for channel name, it means the | |
146 | * default channel name is requested. | |
147 | */ | |
148 | if (name[0] == '\0') | |
149 | name = DEFAULT_CHANNEL_NAME; | |
150 | ||
bec39940 DG |
151 | lttng_ht_lookup(ht, (void *)name, &iter); |
152 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 153 | if (node == NULL) { |
44d3bd01 DG |
154 | goto error; |
155 | } | |
156 | ||
f6a9efaa | 157 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 158 | |
f6a9efaa | 159 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
160 | |
161 | error: | |
f6a9efaa | 162 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
163 | return NULL; |
164 | } | |
165 | ||
166 | /* | |
2223c96f DG |
167 | * Find the event in the hashtable and return event pointer. RCU read side lock |
168 | * MUST be acquired before calling this. | |
97ee3a89 | 169 | */ |
18eace3b | 170 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
10646003 JI |
171 | char *name, struct lttng_filter_bytecode *filter, int loglevel, |
172 | struct lttng_event_exclusion *exclusion) | |
97ee3a89 | 173 | { |
bec39940 DG |
174 | struct lttng_ht_node_str *node; |
175 | struct lttng_ht_iter iter; | |
18eace3b | 176 | struct ltt_ust_ht_key key; |
97ee3a89 | 177 | |
18eace3b DG |
178 | assert(name); |
179 | assert(ht); | |
180 | ||
181 | key.name = name; | |
182 | key.filter = filter; | |
183 | key.loglevel = loglevel; | |
10646003 | 184 | key.exclusion = exclusion; |
18eace3b | 185 | |
18eace3b DG |
186 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
187 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 188 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 189 | if (node == NULL) { |
97ee3a89 DG |
190 | goto error; |
191 | } | |
192 | ||
18eace3b | 193 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
194 | |
195 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
196 | |
197 | error: | |
18eace3b | 198 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
199 | return NULL; |
200 | } | |
201 | ||
fefd409b DG |
202 | /* |
203 | * Lookup an agent in the session agents hash table by domain type and return | |
204 | * the object if found else NULL. | |
43ee60ce JG |
205 | * |
206 | * RCU read side lock must be acquired before calling and only released | |
207 | * once the agent is no longer in scope or being used. | |
fefd409b DG |
208 | */ |
209 | struct agent *trace_ust_find_agent(struct ltt_ust_session *session, | |
210 | enum lttng_domain_type domain_type) | |
211 | { | |
212 | struct agent *agt = NULL; | |
213 | struct lttng_ht_node_u64 *node; | |
214 | struct lttng_ht_iter iter; | |
215 | uint64_t key; | |
216 | ||
217 | assert(session); | |
218 | ||
219 | DBG3("Trace ust agent lookup for domain %d", domain_type); | |
220 | ||
221 | key = domain_type; | |
222 | ||
223 | lttng_ht_lookup(session->agents, &key, &iter); | |
224 | node = lttng_ht_iter_get_node_u64(&iter); | |
225 | if (!node) { | |
226 | goto end; | |
227 | } | |
228 | agt = caa_container_of(node, struct agent, node); | |
229 | ||
230 | end: | |
231 | return agt; | |
232 | } | |
233 | ||
97ee3a89 DG |
234 | /* |
235 | * Allocate and initialize a ust session data structure. | |
236 | * | |
237 | * Return pointer to structure or NULL. | |
238 | */ | |
d9bf3ca4 | 239 | struct ltt_ust_session *trace_ust_create_session(uint64_t session_id) |
97ee3a89 DG |
240 | { |
241 | struct ltt_ust_session *lus; | |
242 | ||
243 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 244 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 245 | if (lus == NULL) { |
ba7f0ae5 | 246 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
247 | goto error; |
248 | } | |
249 | ||
250 | /* Init data structure */ | |
a991f516 | 251 | lus->id = session_id; |
14fb1ebe | 252 | lus->active = 0; |
97ee3a89 | 253 | |
84ad93e8 DG |
254 | /* Set default metadata channel attribute. */ |
255 | lus->metadata_attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
256 | lus->metadata_attr.subbuf_size = default_get_metadata_subbuf_size(); | |
257 | lus->metadata_attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; | |
258 | lus->metadata_attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; | |
259 | lus->metadata_attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
260 | lus->metadata_attr.output = LTTNG_UST_MMAP; | |
261 | ||
7972aab2 DG |
262 | /* |
263 | * Default buffer type. This can be changed through an enable channel | |
264 | * requesting a different type. Note that this can only be changed once | |
265 | * during the session lifetime which is at the first enable channel and | |
266 | * only before start. The flag buffer_type_changed indicates the status. | |
267 | */ | |
8692d4e5 | 268 | lus->buffer_type = LTTNG_BUFFER_PER_UID; |
7972aab2 DG |
269 | /* Once set to 1, the buffer_type is immutable for the session. */ |
270 | lus->buffer_type_changed = 0; | |
271 | /* Init it in case it get used after allocation. */ | |
272 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
273 | |
274 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 275 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
fefd409b DG |
276 | /* Alloc agent hash table. */ |
277 | lus->agents = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
44d3bd01 | 278 | |
00e2e675 DG |
279 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
280 | if (lus->consumer == NULL) { | |
09a90bcd | 281 | goto error_consumer; |
00e2e675 DG |
282 | } |
283 | ||
44d3bd01 DG |
284 | DBG2("UST trace session create successful"); |
285 | ||
97ee3a89 DG |
286 | return lus; |
287 | ||
09a90bcd | 288 | error_consumer: |
0b2dc8df | 289 | ht_cleanup_push(lus->domain_global.channels); |
fefd409b | 290 | ht_cleanup_push(lus->agents); |
44844c29 | 291 | free(lus); |
97ee3a89 DG |
292 | error: |
293 | return NULL; | |
294 | } | |
295 | ||
296 | /* | |
297 | * Allocate and initialize a ust channel data structure. | |
298 | * | |
299 | * Return pointer to structure or NULL. | |
300 | */ | |
dec56f6c | 301 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan) |
97ee3a89 | 302 | { |
97ee3a89 DG |
303 | struct ltt_ust_channel *luc; |
304 | ||
0525e9ae | 305 | assert(chan); |
0525e9ae | 306 | |
37357452 | 307 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 308 | if (luc == NULL) { |
df0f840b | 309 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
310 | goto error; |
311 | } | |
312 | ||
44d3bd01 | 313 | /* Copy UST channel attributes */ |
48842b30 DG |
314 | luc->attr.overwrite = chan->attr.overwrite; |
315 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
316 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
317 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
318 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 319 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
320 | |
321 | /* Translate to UST output enum */ | |
322 | switch (luc->attr.output) { | |
323 | default: | |
324 | luc->attr.output = LTTNG_UST_MMAP; | |
325 | break; | |
97ee3a89 | 326 | } |
97ee3a89 | 327 | |
85076754 MD |
328 | /* |
329 | * If we receive an empty string for channel name, it means the | |
330 | * default channel name is requested. | |
331 | */ | |
332 | if (chan->name[0] == '\0') { | |
333 | strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name)); | |
334 | } else { | |
335 | /* Copy channel name */ | |
336 | strncpy(luc->name, chan->name, sizeof(luc->name)); | |
337 | } | |
97ee3a89 DG |
338 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
339 | ||
f6a9efaa | 340 | /* Init node */ |
bec39940 | 341 | lttng_ht_node_init_str(&luc->node, luc->name); |
31746f93 DG |
342 | CDS_INIT_LIST_HEAD(&luc->ctx_list); |
343 | ||
f6a9efaa | 344 | /* Alloc hash tables */ |
bec39940 DG |
345 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
346 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 347 | |
1624d5b7 JD |
348 | /* On-disk circular buffer parameters */ |
349 | luc->tracefile_size = chan->attr.tracefile_size; | |
350 | luc->tracefile_count = chan->attr.tracefile_count; | |
351 | ||
f6a9efaa DG |
352 | DBG2("Trace UST channel %s created", luc->name); |
353 | ||
97ee3a89 | 354 | error: |
7972aab2 | 355 | return luc; |
97ee3a89 DG |
356 | } |
357 | ||
358 | /* | |
359 | * Allocate and initialize a ust event. Set name and event type. | |
faa9eb17 | 360 | * We own filter_expression, filter, and exclusion. |
97ee3a89 DG |
361 | * |
362 | * Return pointer to structure or NULL. | |
363 | */ | |
025faf73 | 364 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
6b453b5e | 365 | char *filter_expression, |
561c6897 JI |
366 | struct lttng_filter_bytecode *filter, |
367 | struct lttng_event_exclusion *exclusion) | |
97ee3a89 DG |
368 | { |
369 | struct ltt_ust_event *lue; | |
97ee3a89 | 370 | |
0525e9ae DG |
371 | assert(ev); |
372 | ||
37357452 | 373 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 374 | if (lue == NULL) { |
ba7f0ae5 | 375 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
376 | goto error; |
377 | } | |
378 | ||
379 | switch (ev->type) { | |
380 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 381 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
382 | break; |
383 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 384 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
385 | break; |
386 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 387 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
388 | break; |
389 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 390 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
391 | break; |
392 | default: | |
393 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 394 | goto error_free_event; |
97ee3a89 DG |
395 | } |
396 | ||
397 | /* Copy event name */ | |
44d3bd01 DG |
398 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
399 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 400 | |
0cda4f28 | 401 | switch (ev->loglevel_type) { |
8005f29a MD |
402 | case LTTNG_EVENT_LOGLEVEL_ALL: |
403 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 404 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 405 | break; |
8005f29a MD |
406 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
407 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 408 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
409 | break; |
410 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
411 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 412 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
413 | break; |
414 | default: | |
4431494b | 415 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
416 | goto error_free_event; |
417 | } | |
3a400966 MD |
418 | /* |
419 | * Fix for enabler race. Enable is now done explicitly by | |
420 | * sessiond after setting filter. | |
421 | */ | |
422 | lue->attr.disabled = 1; | |
0cda4f28 | 423 | |
025faf73 | 424 | /* Same layout. */ |
6b453b5e | 425 | lue->filter_expression = filter_expression; |
025faf73 | 426 | lue->filter = (struct lttng_ust_filter_bytecode *) filter; |
561c6897 | 427 | lue->exclusion = (struct lttng_event_exclusion *) exclusion; |
0cda4f28 | 428 | |
f6a9efaa | 429 | /* Init node */ |
bec39940 | 430 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 431 | |
300b8fd5 MD |
432 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
433 | lue->attr.name, lue->attr.loglevel_type, | |
434 | lue->attr.loglevel); | |
284d8f55 | 435 | |
97ee3a89 DG |
436 | return lue; |
437 | ||
44844c29 MD |
438 | error_free_event: |
439 | free(lue); | |
97ee3a89 | 440 | error: |
faa9eb17 MD |
441 | free(filter_expression); |
442 | free(filter); | |
443 | free(exclusion); | |
97ee3a89 DG |
444 | return NULL; |
445 | } | |
446 | ||
aa3514e9 MD |
447 | static |
448 | int trace_ust_context_type_event_to_ust(enum lttng_event_context_type type) | |
55cc08a6 | 449 | { |
aa3514e9 | 450 | int utype; |
0525e9ae | 451 | |
aa3514e9 | 452 | switch (type) { |
9197c5c4 MD |
453 | case LTTNG_EVENT_CONTEXT_VTID: |
454 | utype = LTTNG_UST_CONTEXT_VTID; | |
455 | break; | |
456 | case LTTNG_EVENT_CONTEXT_VPID: | |
457 | utype = LTTNG_UST_CONTEXT_VPID; | |
458 | break; | |
459 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
460 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
461 | break; | |
462 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
463 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
464 | break; | |
7c612c2e WP |
465 | case LTTNG_EVENT_CONTEXT_IP: |
466 | utype = LTTNG_UST_CONTEXT_IP; | |
467 | break; | |
aa3514e9 | 468 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: |
0e9a503d MD |
469 | if (!ustctl_has_perf_counters()) { |
470 | utype = -1; | |
471 | WARN("Perf counters not implemented in UST"); | |
472 | } else { | |
473 | utype = LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER; | |
474 | } | |
aa3514e9 | 475 | break; |
9197c5c4 MD |
476 | default: |
477 | ERR("Invalid UST context"); | |
aa3514e9 MD |
478 | utype = -1; |
479 | break; | |
480 | } | |
481 | return utype; | |
482 | } | |
483 | ||
484 | /* | |
485 | * Return 1 if contexts match, 0 otherwise. | |
486 | */ | |
487 | int trace_ust_match_context(struct ltt_ust_context *uctx, | |
488 | struct lttng_event_context *ctx) | |
489 | { | |
490 | int utype; | |
491 | ||
492 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
493 | if (utype < 0) { | |
494 | return 0; | |
495 | } | |
496 | if (uctx->ctx.ctx != utype) { | |
497 | return 0; | |
498 | } | |
499 | switch (utype) { | |
500 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
501 | if (uctx->ctx.u.perf_counter.type | |
502 | != ctx->u.perf_counter.type) { | |
503 | return 0; | |
504 | } | |
505 | if (uctx->ctx.u.perf_counter.config | |
506 | != ctx->u.perf_counter.config) { | |
507 | return 0; | |
508 | } | |
509 | if (strncmp(uctx->ctx.u.perf_counter.name, | |
510 | ctx->u.perf_counter.name, | |
511 | LTTNG_UST_SYM_NAME_LEN)) { | |
512 | return 0; | |
513 | } | |
514 | break; | |
515 | default: | |
516 | break; | |
517 | ||
518 | } | |
519 | return 1; | |
520 | } | |
521 | ||
522 | /* | |
523 | * Allocate and initialize an UST context. | |
524 | * | |
525 | * Return pointer to structure or NULL. | |
526 | */ | |
527 | struct ltt_ust_context *trace_ust_create_context( | |
528 | struct lttng_event_context *ctx) | |
529 | { | |
530 | struct ltt_ust_context *uctx; | |
531 | int utype; | |
532 | ||
533 | assert(ctx); | |
534 | ||
535 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
536 | if (utype < 0) { | |
9197c5c4 MD |
537 | return NULL; |
538 | } | |
55cc08a6 DG |
539 | |
540 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
541 | if (uctx == NULL) { | |
542 | PERROR("zmalloc ltt_ust_context"); | |
543 | goto error; | |
544 | } | |
545 | ||
aa3514e9 MD |
546 | uctx->ctx.ctx = (enum lttng_ust_context_type) utype; |
547 | switch (utype) { | |
548 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
549 | uctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; | |
550 | uctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
551 | strncpy(uctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
552 | LTTNG_UST_SYM_NAME_LEN); | |
553 | uctx->ctx.u.perf_counter.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
554 | break; | |
555 | default: | |
556 | break; | |
557 | } | |
bec39940 | 558 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
559 | |
560 | return uctx; | |
561 | ||
562 | error: | |
563 | return NULL; | |
564 | } | |
565 | ||
f6a9efaa DG |
566 | /* |
567 | * RCU safe free context structure. | |
568 | */ | |
569 | static void destroy_context_rcu(struct rcu_head *head) | |
570 | { | |
bec39940 DG |
571 | struct lttng_ht_node_ulong *node = |
572 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
573 | struct ltt_ust_context *ctx = |
574 | caa_container_of(node, struct ltt_ust_context, node); | |
575 | ||
576 | free(ctx); | |
577 | } | |
578 | ||
579 | /* | |
580 | * Cleanup UST context hash table. | |
581 | */ | |
7bd39047 | 582 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
583 | { |
584 | int ret; | |
bec39940 DG |
585 | struct lttng_ht_node_ulong *node; |
586 | struct lttng_ht_iter iter; | |
31746f93 | 587 | struct ltt_ust_context *ctx; |
f6a9efaa | 588 | |
0525e9ae DG |
589 | assert(ht); |
590 | ||
36b588ed | 591 | rcu_read_lock(); |
bec39940 | 592 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
31746f93 DG |
593 | /* Remove from ordered list. */ |
594 | ctx = caa_container_of(node, struct ltt_ust_context, node); | |
595 | cds_list_del(&ctx->list); | |
596 | /* Remove from channel's hash table. */ | |
bec39940 | 597 | ret = lttng_ht_del(ht, &iter); |
f6a9efaa DG |
598 | if (!ret) { |
599 | call_rcu(&node->head, destroy_context_rcu); | |
600 | } | |
f6a9efaa | 601 | } |
36b588ed | 602 | rcu_read_unlock(); |
ed52805d | 603 | |
0b2dc8df | 604 | ht_cleanup_push(ht); |
f6a9efaa DG |
605 | } |
606 | ||
97ee3a89 DG |
607 | /* |
608 | * Cleanup ust event structure. | |
609 | */ | |
610 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
611 | { | |
0525e9ae DG |
612 | assert(event); |
613 | ||
f6a9efaa | 614 | DBG2("Trace destroy UST event %s", event->attr.name); |
6b453b5e | 615 | free(event->filter_expression); |
53a80697 | 616 | free(event->filter); |
40024f8a | 617 | free(event->exclusion); |
97ee3a89 DG |
618 | free(event); |
619 | } | |
620 | ||
f6a9efaa DG |
621 | /* |
622 | * URCU intermediate call to complete destroy event. | |
623 | */ | |
624 | static void destroy_event_rcu(struct rcu_head *head) | |
625 | { | |
bec39940 DG |
626 | struct lttng_ht_node_str *node = |
627 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
628 | struct ltt_ust_event *event = |
629 | caa_container_of(node, struct ltt_ust_event, node); | |
630 | ||
631 | trace_ust_destroy_event(event); | |
632 | } | |
633 | ||
284d8f55 DG |
634 | /* |
635 | * Cleanup UST events hashtable. | |
636 | */ | |
7bd39047 | 637 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
638 | { |
639 | int ret; | |
bec39940 DG |
640 | struct lttng_ht_node_str *node; |
641 | struct lttng_ht_iter iter; | |
ed52805d | 642 | |
0525e9ae DG |
643 | assert(events); |
644 | ||
36b588ed | 645 | rcu_read_lock(); |
bec39940 DG |
646 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
647 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
648 | assert(!ret); |
649 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 650 | } |
36b588ed | 651 | rcu_read_unlock(); |
ed52805d | 652 | |
0b2dc8df | 653 | ht_cleanup_push(events); |
ed52805d DG |
654 | } |
655 | ||
97ee3a89 DG |
656 | /* |
657 | * Cleanup ust channel structure. | |
36b588ed MD |
658 | * |
659 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 660 | */ |
36b588ed | 661 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 662 | { |
0525e9ae DG |
663 | assert(channel); |
664 | ||
f6a9efaa | 665 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 666 | |
7bd39047 DG |
667 | /* Destroying all events of the channel */ |
668 | destroy_events(channel->events); | |
669 | /* Destroying all context of the channel */ | |
670 | destroy_contexts(channel->ctx); | |
97ee3a89 | 671 | |
97ee3a89 | 672 | free(channel); |
f6a9efaa DG |
673 | } |
674 | ||
675 | /* | |
676 | * URCU intermediate call to complete destroy channel. | |
677 | */ | |
678 | static void destroy_channel_rcu(struct rcu_head *head) | |
679 | { | |
bec39940 DG |
680 | struct lttng_ht_node_str *node = |
681 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
682 | struct ltt_ust_channel *channel = |
683 | caa_container_of(node, struct ltt_ust_channel, node); | |
684 | ||
36b588ed MD |
685 | _trace_ust_destroy_channel(channel); |
686 | } | |
687 | ||
688 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
689 | { | |
690 | call_rcu(&channel->node.head, destroy_channel_rcu); | |
97ee3a89 DG |
691 | } |
692 | ||
d5979e4a DG |
693 | /* |
694 | * Remove an UST channel from a channel HT. | |
695 | */ | |
696 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
697 | struct ltt_ust_channel *channel) | |
698 | { | |
699 | int ret; | |
700 | struct lttng_ht_iter iter; | |
701 | ||
702 | assert(ht); | |
703 | assert(channel); | |
704 | ||
705 | iter.iter.node = &channel->node.node; | |
706 | ret = lttng_ht_del(ht, &iter); | |
707 | assert(!ret); | |
708 | } | |
709 | ||
97ee3a89 | 710 | /* |
f6a9efaa | 711 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 712 | */ |
bec39940 | 713 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa DG |
714 | { |
715 | int ret; | |
bec39940 DG |
716 | struct lttng_ht_node_str *node; |
717 | struct lttng_ht_iter iter; | |
f6a9efaa | 718 | |
0525e9ae DG |
719 | assert(channels); |
720 | ||
24d1723f DG |
721 | rcu_read_lock(); |
722 | ||
bec39940 DG |
723 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
724 | ret = lttng_ht_del(channels, &iter); | |
7bd39047 DG |
725 | assert(!ret); |
726 | call_rcu(&node->head, destroy_channel_rcu); | |
f6a9efaa | 727 | } |
36b588ed | 728 | rcu_read_unlock(); |
ed52805d | 729 | |
0b2dc8df | 730 | ht_cleanup_push(channels); |
f6a9efaa DG |
731 | } |
732 | ||
f6a9efaa DG |
733 | /* |
734 | * Cleanup UST global domain. | |
735 | */ | |
736 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
737 | { | |
0525e9ae DG |
738 | assert(dom); |
739 | ||
f6a9efaa DG |
740 | destroy_channels(dom->channels); |
741 | } | |
97ee3a89 | 742 | |
f6a9efaa DG |
743 | /* |
744 | * Cleanup ust session structure | |
36b588ed MD |
745 | * |
746 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
747 | */ |
748 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
749 | { | |
fefd409b | 750 | struct agent *agt; |
7972aab2 | 751 | struct buffer_reg_uid *reg, *sreg; |
fefd409b | 752 | struct lttng_ht_iter iter; |
7972aab2 | 753 | |
0525e9ae | 754 | assert(session); |
97ee3a89 | 755 | |
d9bf3ca4 | 756 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 757 | |
f6a9efaa DG |
758 | /* Cleaning up UST domain */ |
759 | destroy_domain_global(&session->domain_global); | |
fefd409b | 760 | |
658e42c3 | 761 | rcu_read_lock(); |
fefd409b DG |
762 | cds_lfht_for_each_entry(session->agents->ht, &iter.iter, agt, node.node) { |
763 | lttng_ht_del(session->agents, &iter); | |
764 | agent_destroy(agt); | |
765 | } | |
658e42c3 | 766 | rcu_read_unlock(); |
7972aab2 DG |
767 | |
768 | /* Cleanup UID buffer registry object(s). */ | |
769 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
770 | lnode) { | |
771 | cds_list_del(®->lnode); | |
772 | buffer_reg_uid_remove(reg); | |
773 | buffer_reg_uid_destroy(reg, session->consumer); | |
774 | } | |
44d3bd01 | 775 | |
7ec4dd5a | 776 | consumer_output_put(session->consumer); |
3f8e211f | 777 | |
97ee3a89 DG |
778 | free(session); |
779 | } |