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 | |
6c1c0768 | 19 | #define _LGPL_SOURCE |
97ee3a89 DG |
20 | #include <stdio.h> |
21 | #include <stdlib.h> | |
22 | #include <string.h> | |
23 | #include <unistd.h> | |
d9bf3ca4 | 24 | #include <inttypes.h> |
97ee3a89 | 25 | |
990570ed DG |
26 | #include <common/common.h> |
27 | #include <common/defaults.h> | |
97ee3a89 | 28 | |
7972aab2 | 29 | #include "buffer-registry.h" |
97ee3a89 | 30 | #include "trace-ust.h" |
0b2dc8df | 31 | #include "utils.h" |
a9ad0c8f | 32 | #include "ust-app.h" |
7c1d2758 | 33 | #include "agent.h" |
97ee3a89 | 34 | |
025faf73 DG |
35 | /* |
36 | * Match function for the events hash table lookup. | |
37 | * | |
38 | * Matches by name only. Used by the disable command. | |
39 | */ | |
18eace3b DG |
40 | int trace_ust_ht_match_event_by_name(struct cds_lfht_node *node, |
41 | const void *_key) | |
42 | { | |
43 | struct ltt_ust_event *event; | |
44 | const char *name; | |
45 | ||
46 | assert(node); | |
47 | assert(_key); | |
48 | ||
49 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
50 | name = _key; | |
51 | ||
52 | /* Event name */ | |
53 | if (strncmp(event->attr.name, name, sizeof(event->attr.name)) != 0) { | |
54 | goto no_match; | |
55 | } | |
56 | ||
025faf73 | 57 | /* Match */ |
18eace3b DG |
58 | return 1; |
59 | ||
60 | no_match: | |
61 | return 0; | |
62 | } | |
63 | ||
025faf73 DG |
64 | /* |
65 | * Match function for the hash table lookup. | |
66 | * | |
67 | * It matches an ust event based on three attributes which are the event name, | |
68 | * the filter bytecode and the loglevel. | |
69 | */ | |
18eace3b DG |
70 | int trace_ust_ht_match_event(struct cds_lfht_node *node, const void *_key) |
71 | { | |
72 | struct ltt_ust_event *event; | |
73 | const struct ltt_ust_ht_key *key; | |
2106efa0 | 74 | int ev_loglevel_value; |
18eace3b DG |
75 | |
76 | assert(node); | |
77 | assert(_key); | |
78 | ||
79 | event = caa_container_of(node, struct ltt_ust_event, node.node); | |
80 | key = _key; | |
2106efa0 | 81 | ev_loglevel_value = event->attr.loglevel; |
18eace3b | 82 | |
f19e9f8b | 83 | /* Match the 4 elements of the key: name, filter, loglevel, exclusions. */ |
18eace3b DG |
84 | |
85 | /* Event name */ | |
86 | if (strncmp(event->attr.name, key->name, sizeof(event->attr.name)) != 0) { | |
18eace3b DG |
87 | goto no_match; |
88 | } | |
89 | ||
90 | /* Event loglevel. */ | |
2106efa0 | 91 | if (ev_loglevel_value != key->loglevel_type) { |
025faf73 | 92 | if (event->attr.loglevel_type == LTTNG_UST_LOGLEVEL_ALL |
2106efa0 | 93 | && key->loglevel_type == 0 && ev_loglevel_value == -1) { |
18eace3b | 94 | /* |
025faf73 DG |
95 | * Match is accepted. This is because on event creation, the |
96 | * loglevel is set to -1 if the event loglevel type is ALL so 0 and | |
97 | * -1 are accepted for this loglevel type since 0 is the one set by | |
98 | * the API when receiving an enable event. | |
18eace3b DG |
99 | */ |
100 | } else { | |
18eace3b DG |
101 | goto no_match; |
102 | } | |
103 | } | |
104 | ||
105 | /* Only one of the filters is NULL, fail. */ | |
106 | if ((key->filter && !event->filter) || (!key->filter && event->filter)) { | |
18eace3b DG |
107 | goto no_match; |
108 | } | |
109 | ||
025faf73 DG |
110 | if (key->filter && event->filter) { |
111 | /* Both filters exists, check length followed by the bytecode. */ | |
112 | if (event->filter->len != key->filter->len || | |
113 | memcmp(event->filter->data, key->filter->data, | |
114 | event->filter->len) != 0) { | |
115 | goto no_match; | |
116 | } | |
18eace3b DG |
117 | } |
118 | ||
f19e9f8b JI |
119 | /* If only one of the exclusions is NULL, fail. */ |
120 | if ((key->exclusion && !event->exclusion) || (!key->exclusion && event->exclusion)) { | |
121 | goto no_match; | |
122 | } | |
123 | ||
124 | if (key->exclusion && event->exclusion) { | |
125 | /* Both exclusions exist; check count followed by names. */ | |
126 | if (event->exclusion->count != key->exclusion->count || | |
127 | memcmp(event->exclusion->names, key->exclusion->names, | |
128 | event->exclusion->count * LTTNG_SYMBOL_NAME_LEN) != 0) { | |
129 | goto no_match; | |
130 | } | |
131 | } | |
025faf73 DG |
132 | /* Match. */ |
133 | return 1; | |
18eace3b DG |
134 | |
135 | no_match: | |
136 | return 0; | |
18eace3b DG |
137 | } |
138 | ||
0177d773 | 139 | /* |
2223c96f DG |
140 | * Find the channel in the hashtable and return channel pointer. RCU read side |
141 | * lock MUST be acquired before calling this. | |
0177d773 | 142 | */ |
bec39940 | 143 | struct ltt_ust_channel *trace_ust_find_channel_by_name(struct lttng_ht *ht, |
f6a9efaa | 144 | char *name) |
0177d773 | 145 | { |
bec39940 DG |
146 | struct lttng_ht_node_str *node; |
147 | struct lttng_ht_iter iter; | |
0177d773 | 148 | |
85076754 MD |
149 | /* |
150 | * If we receive an empty string for channel name, it means the | |
151 | * default channel name is requested. | |
152 | */ | |
153 | if (name[0] == '\0') | |
154 | name = DEFAULT_CHANNEL_NAME; | |
155 | ||
bec39940 DG |
156 | lttng_ht_lookup(ht, (void *)name, &iter); |
157 | node = lttng_ht_iter_get_node_str(&iter); | |
f6a9efaa | 158 | if (node == NULL) { |
44d3bd01 DG |
159 | goto error; |
160 | } | |
161 | ||
f6a9efaa | 162 | DBG2("Trace UST channel %s found by name", name); |
0177d773 | 163 | |
f6a9efaa | 164 | return caa_container_of(node, struct ltt_ust_channel, node); |
97ee3a89 DG |
165 | |
166 | error: | |
f6a9efaa | 167 | DBG2("Trace UST channel %s not found by name", name); |
97ee3a89 DG |
168 | return NULL; |
169 | } | |
170 | ||
171 | /* | |
2223c96f DG |
172 | * Find the event in the hashtable and return event pointer. RCU read side lock |
173 | * MUST be acquired before calling this. | |
97ee3a89 | 174 | */ |
18eace3b | 175 | struct ltt_ust_event *trace_ust_find_event(struct lttng_ht *ht, |
2106efa0 PP |
176 | char *name, struct lttng_filter_bytecode *filter, |
177 | int loglevel_value, struct lttng_event_exclusion *exclusion) | |
97ee3a89 | 178 | { |
bec39940 DG |
179 | struct lttng_ht_node_str *node; |
180 | struct lttng_ht_iter iter; | |
18eace3b | 181 | struct ltt_ust_ht_key key; |
97ee3a89 | 182 | |
18eace3b DG |
183 | assert(name); |
184 | assert(ht); | |
185 | ||
186 | key.name = name; | |
187 | key.filter = filter; | |
2106efa0 | 188 | key.loglevel_type = loglevel_value; |
10646003 | 189 | key.exclusion = exclusion; |
18eace3b | 190 | |
18eace3b DG |
191 | cds_lfht_lookup(ht->ht, ht->hash_fct((void *) name, lttng_ht_seed), |
192 | trace_ust_ht_match_event, &key, &iter.iter); | |
bec39940 | 193 | node = lttng_ht_iter_get_node_str(&iter); |
f6a9efaa | 194 | if (node == NULL) { |
97ee3a89 DG |
195 | goto error; |
196 | } | |
197 | ||
18eace3b | 198 | DBG2("Trace UST event %s found", key.name); |
f6a9efaa DG |
199 | |
200 | return caa_container_of(node, struct ltt_ust_event, node); | |
97ee3a89 DG |
201 | |
202 | error: | |
18eace3b | 203 | DBG2("Trace UST event %s NOT found", key.name); |
97ee3a89 DG |
204 | return NULL; |
205 | } | |
206 | ||
fefd409b DG |
207 | /* |
208 | * Lookup an agent in the session agents hash table by domain type and return | |
209 | * the object if found else NULL. | |
4da703ad JG |
210 | * |
211 | * RCU read side lock must be acquired before calling and only released | |
212 | * once the agent is no longer in scope or being used. | |
fefd409b DG |
213 | */ |
214 | struct agent *trace_ust_find_agent(struct ltt_ust_session *session, | |
215 | enum lttng_domain_type domain_type) | |
216 | { | |
217 | struct agent *agt = NULL; | |
218 | struct lttng_ht_node_u64 *node; | |
219 | struct lttng_ht_iter iter; | |
220 | uint64_t key; | |
221 | ||
222 | assert(session); | |
223 | ||
224 | DBG3("Trace ust agent lookup for domain %d", domain_type); | |
225 | ||
226 | key = domain_type; | |
227 | ||
228 | lttng_ht_lookup(session->agents, &key, &iter); | |
229 | node = lttng_ht_iter_get_node_u64(&iter); | |
230 | if (!node) { | |
231 | goto end; | |
232 | } | |
233 | agt = caa_container_of(node, struct agent, node); | |
234 | ||
235 | end: | |
236 | return agt; | |
237 | } | |
238 | ||
97ee3a89 DG |
239 | /* |
240 | * Allocate and initialize a ust session data structure. | |
241 | * | |
242 | * Return pointer to structure or NULL. | |
243 | */ | |
d9bf3ca4 | 244 | struct ltt_ust_session *trace_ust_create_session(uint64_t session_id) |
97ee3a89 DG |
245 | { |
246 | struct ltt_ust_session *lus; | |
247 | ||
248 | /* Allocate a new ltt ust session */ | |
ba7f0ae5 | 249 | lus = zmalloc(sizeof(struct ltt_ust_session)); |
97ee3a89 | 250 | if (lus == NULL) { |
ba7f0ae5 | 251 | PERROR("create ust session zmalloc"); |
97ee3a89 DG |
252 | goto error; |
253 | } | |
254 | ||
255 | /* Init data structure */ | |
a991f516 | 256 | lus->id = session_id; |
14fb1ebe | 257 | lus->active = 0; |
97ee3a89 | 258 | |
84ad93e8 DG |
259 | /* Set default metadata channel attribute. */ |
260 | lus->metadata_attr.overwrite = DEFAULT_CHANNEL_OVERWRITE; | |
261 | lus->metadata_attr.subbuf_size = default_get_metadata_subbuf_size(); | |
262 | lus->metadata_attr.num_subbuf = DEFAULT_METADATA_SUBBUF_NUM; | |
263 | lus->metadata_attr.switch_timer_interval = DEFAULT_METADATA_SWITCH_TIMER; | |
264 | lus->metadata_attr.read_timer_interval = DEFAULT_METADATA_READ_TIMER; | |
265 | lus->metadata_attr.output = LTTNG_UST_MMAP; | |
266 | ||
7972aab2 DG |
267 | /* |
268 | * Default buffer type. This can be changed through an enable channel | |
269 | * requesting a different type. Note that this can only be changed once | |
270 | * during the session lifetime which is at the first enable channel and | |
271 | * only before start. The flag buffer_type_changed indicates the status. | |
272 | */ | |
8692d4e5 | 273 | lus->buffer_type = LTTNG_BUFFER_PER_UID; |
7972aab2 DG |
274 | /* Once set to 1, the buffer_type is immutable for the session. */ |
275 | lus->buffer_type_changed = 0; | |
276 | /* Init it in case it get used after allocation. */ | |
277 | CDS_INIT_LIST_HEAD(&lus->buffer_reg_uid_list); | |
f6a9efaa DG |
278 | |
279 | /* Alloc UST global domain channels' HT */ | |
bec39940 | 280 | lus->domain_global.channels = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
fefd409b DG |
281 | /* Alloc agent hash table. */ |
282 | lus->agents = lttng_ht_new(0, LTTNG_HT_TYPE_U64); | |
44d3bd01 | 283 | |
00e2e675 DG |
284 | lus->consumer = consumer_create_output(CONSUMER_DST_LOCAL); |
285 | if (lus->consumer == NULL) { | |
09a90bcd | 286 | goto error_consumer; |
00e2e675 DG |
287 | } |
288 | ||
44d3bd01 DG |
289 | DBG2("UST trace session create successful"); |
290 | ||
97ee3a89 DG |
291 | return lus; |
292 | ||
09a90bcd | 293 | error_consumer: |
0b2dc8df | 294 | ht_cleanup_push(lus->domain_global.channels); |
fefd409b | 295 | ht_cleanup_push(lus->agents); |
44844c29 | 296 | free(lus); |
97ee3a89 DG |
297 | error: |
298 | return NULL; | |
299 | } | |
300 | ||
301 | /* | |
302 | * Allocate and initialize a ust channel data structure. | |
303 | * | |
304 | * Return pointer to structure or NULL. | |
305 | */ | |
51755dc8 JG |
306 | struct ltt_ust_channel *trace_ust_create_channel(struct lttng_channel *chan, |
307 | enum lttng_domain_type domain) | |
97ee3a89 | 308 | { |
97ee3a89 DG |
309 | struct ltt_ust_channel *luc; |
310 | ||
0525e9ae | 311 | assert(chan); |
0525e9ae | 312 | |
37357452 | 313 | luc = zmalloc(sizeof(struct ltt_ust_channel)); |
97ee3a89 | 314 | if (luc == NULL) { |
df0f840b | 315 | PERROR("ltt_ust_channel zmalloc"); |
97ee3a89 DG |
316 | goto error; |
317 | } | |
318 | ||
51755dc8 JG |
319 | luc->domain = domain; |
320 | ||
44d3bd01 | 321 | /* Copy UST channel attributes */ |
48842b30 DG |
322 | luc->attr.overwrite = chan->attr.overwrite; |
323 | luc->attr.subbuf_size = chan->attr.subbuf_size; | |
324 | luc->attr.num_subbuf = chan->attr.num_subbuf; | |
325 | luc->attr.switch_timer_interval = chan->attr.switch_timer_interval; | |
326 | luc->attr.read_timer_interval = chan->attr.read_timer_interval; | |
6775595e | 327 | luc->attr.output = (enum lttng_ust_output) chan->attr.output; |
44d3bd01 DG |
328 | |
329 | /* Translate to UST output enum */ | |
330 | switch (luc->attr.output) { | |
331 | default: | |
332 | luc->attr.output = LTTNG_UST_MMAP; | |
333 | break; | |
97ee3a89 | 334 | } |
97ee3a89 | 335 | |
85076754 MD |
336 | /* |
337 | * If we receive an empty string for channel name, it means the | |
338 | * default channel name is requested. | |
339 | */ | |
340 | if (chan->name[0] == '\0') { | |
341 | strncpy(luc->name, DEFAULT_CHANNEL_NAME, sizeof(luc->name)); | |
342 | } else { | |
343 | /* Copy channel name */ | |
344 | strncpy(luc->name, chan->name, sizeof(luc->name)); | |
345 | } | |
97ee3a89 DG |
346 | luc->name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; |
347 | ||
f6a9efaa | 348 | /* Init node */ |
bec39940 | 349 | lttng_ht_node_init_str(&luc->node, luc->name); |
31746f93 DG |
350 | CDS_INIT_LIST_HEAD(&luc->ctx_list); |
351 | ||
f6a9efaa | 352 | /* Alloc hash tables */ |
bec39940 DG |
353 | luc->events = lttng_ht_new(0, LTTNG_HT_TYPE_STRING); |
354 | luc->ctx = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
f6a9efaa | 355 | |
1624d5b7 JD |
356 | /* On-disk circular buffer parameters */ |
357 | luc->tracefile_size = chan->attr.tracefile_size; | |
358 | luc->tracefile_count = chan->attr.tracefile_count; | |
359 | ||
f6a9efaa DG |
360 | DBG2("Trace UST channel %s created", luc->name); |
361 | ||
97ee3a89 | 362 | error: |
7972aab2 | 363 | return luc; |
97ee3a89 DG |
364 | } |
365 | ||
366 | /* | |
367 | * Allocate and initialize a ust event. Set name and event type. | |
49d21f93 | 368 | * We own filter_expression, filter, and exclusion. |
97ee3a89 DG |
369 | * |
370 | * Return pointer to structure or NULL. | |
371 | */ | |
025faf73 | 372 | struct ltt_ust_event *trace_ust_create_event(struct lttng_event *ev, |
6b453b5e | 373 | char *filter_expression, |
561c6897 | 374 | struct lttng_filter_bytecode *filter, |
88f06f15 JG |
375 | struct lttng_event_exclusion *exclusion, |
376 | bool internal_event) | |
97ee3a89 DG |
377 | { |
378 | struct ltt_ust_event *lue; | |
97ee3a89 | 379 | |
0525e9ae DG |
380 | assert(ev); |
381 | ||
37357452 | 382 | lue = zmalloc(sizeof(struct ltt_ust_event)); |
44d3bd01 | 383 | if (lue == NULL) { |
ba7f0ae5 | 384 | PERROR("ust event zmalloc"); |
97ee3a89 DG |
385 | goto error; |
386 | } | |
387 | ||
88f06f15 JG |
388 | lue->internal = internal_event; |
389 | ||
97ee3a89 DG |
390 | switch (ev->type) { |
391 | case LTTNG_EVENT_PROBE: | |
44d3bd01 | 392 | lue->attr.instrumentation = LTTNG_UST_PROBE; |
97ee3a89 DG |
393 | break; |
394 | case LTTNG_EVENT_FUNCTION: | |
44d3bd01 | 395 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
396 | break; |
397 | case LTTNG_EVENT_FUNCTION_ENTRY: | |
44d3bd01 | 398 | lue->attr.instrumentation = LTTNG_UST_FUNCTION; |
97ee3a89 DG |
399 | break; |
400 | case LTTNG_EVENT_TRACEPOINT: | |
44d3bd01 | 401 | lue->attr.instrumentation = LTTNG_UST_TRACEPOINT; |
97ee3a89 DG |
402 | break; |
403 | default: | |
404 | ERR("Unknown ust instrumentation type (%d)", ev->type); | |
44844c29 | 405 | goto error_free_event; |
97ee3a89 DG |
406 | } |
407 | ||
408 | /* Copy event name */ | |
44d3bd01 DG |
409 | strncpy(lue->attr.name, ev->name, LTTNG_UST_SYM_NAME_LEN); |
410 | lue->attr.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
97ee3a89 | 411 | |
0cda4f28 | 412 | switch (ev->loglevel_type) { |
8005f29a MD |
413 | case LTTNG_EVENT_LOGLEVEL_ALL: |
414 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_ALL; | |
22e25b71 | 415 | lue->attr.loglevel = -1; /* Force to -1 */ |
0cda4f28 | 416 | break; |
8005f29a MD |
417 | case LTTNG_EVENT_LOGLEVEL_RANGE: |
418 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_RANGE; | |
22e25b71 | 419 | lue->attr.loglevel = ev->loglevel; |
8005f29a MD |
420 | break; |
421 | case LTTNG_EVENT_LOGLEVEL_SINGLE: | |
422 | lue->attr.loglevel_type = LTTNG_UST_LOGLEVEL_SINGLE; | |
22e25b71 | 423 | lue->attr.loglevel = ev->loglevel; |
0cda4f28 MD |
424 | break; |
425 | default: | |
4431494b | 426 | ERR("Unknown ust loglevel type (%d)", ev->loglevel_type); |
0cda4f28 MD |
427 | goto error_free_event; |
428 | } | |
429 | ||
025faf73 | 430 | /* Same layout. */ |
6b453b5e | 431 | lue->filter_expression = filter_expression; |
51755dc8 JG |
432 | lue->filter = filter; |
433 | lue->exclusion = exclusion; | |
0cda4f28 | 434 | |
f6a9efaa | 435 | /* Init node */ |
bec39940 | 436 | lttng_ht_node_init_str(&lue->node, lue->attr.name); |
97ee3a89 | 437 | |
300b8fd5 MD |
438 | DBG2("Trace UST event %s, loglevel (%d,%d) created", |
439 | lue->attr.name, lue->attr.loglevel_type, | |
440 | lue->attr.loglevel); | |
284d8f55 | 441 | |
97ee3a89 DG |
442 | return lue; |
443 | ||
44844c29 MD |
444 | error_free_event: |
445 | free(lue); | |
97ee3a89 | 446 | error: |
49d21f93 MD |
447 | free(filter_expression); |
448 | free(filter); | |
449 | free(exclusion); | |
97ee3a89 DG |
450 | return NULL; |
451 | } | |
452 | ||
aa3514e9 MD |
453 | static |
454 | int trace_ust_context_type_event_to_ust(enum lttng_event_context_type type) | |
55cc08a6 | 455 | { |
aa3514e9 | 456 | int utype; |
0525e9ae | 457 | |
aa3514e9 | 458 | switch (type) { |
9197c5c4 MD |
459 | case LTTNG_EVENT_CONTEXT_VTID: |
460 | utype = LTTNG_UST_CONTEXT_VTID; | |
461 | break; | |
462 | case LTTNG_EVENT_CONTEXT_VPID: | |
463 | utype = LTTNG_UST_CONTEXT_VPID; | |
464 | break; | |
465 | case LTTNG_EVENT_CONTEXT_PTHREAD_ID: | |
466 | utype = LTTNG_UST_CONTEXT_PTHREAD_ID; | |
467 | break; | |
468 | case LTTNG_EVENT_CONTEXT_PROCNAME: | |
469 | utype = LTTNG_UST_CONTEXT_PROCNAME; | |
470 | break; | |
7c612c2e WP |
471 | case LTTNG_EVENT_CONTEXT_IP: |
472 | utype = LTTNG_UST_CONTEXT_IP; | |
473 | break; | |
aa3514e9 | 474 | case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER: |
354e561b MD |
475 | if (!ustctl_has_perf_counters()) { |
476 | utype = -1; | |
477 | WARN("Perf counters not implemented in UST"); | |
478 | } else { | |
479 | utype = LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER; | |
480 | } | |
aa3514e9 | 481 | break; |
9197c5c4 MD |
482 | default: |
483 | ERR("Invalid UST context"); | |
aa3514e9 MD |
484 | utype = -1; |
485 | break; | |
486 | } | |
487 | return utype; | |
488 | } | |
489 | ||
490 | /* | |
491 | * Return 1 if contexts match, 0 otherwise. | |
492 | */ | |
493 | int trace_ust_match_context(struct ltt_ust_context *uctx, | |
494 | struct lttng_event_context *ctx) | |
495 | { | |
496 | int utype; | |
497 | ||
498 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
499 | if (utype < 0) { | |
500 | return 0; | |
501 | } | |
502 | if (uctx->ctx.ctx != utype) { | |
503 | return 0; | |
504 | } | |
505 | switch (utype) { | |
506 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
507 | if (uctx->ctx.u.perf_counter.type | |
508 | != ctx->u.perf_counter.type) { | |
509 | return 0; | |
510 | } | |
511 | if (uctx->ctx.u.perf_counter.config | |
512 | != ctx->u.perf_counter.config) { | |
513 | return 0; | |
514 | } | |
515 | if (strncmp(uctx->ctx.u.perf_counter.name, | |
516 | ctx->u.perf_counter.name, | |
517 | LTTNG_UST_SYM_NAME_LEN)) { | |
518 | return 0; | |
519 | } | |
520 | break; | |
521 | default: | |
522 | break; | |
523 | ||
524 | } | |
525 | return 1; | |
526 | } | |
527 | ||
528 | /* | |
529 | * Allocate and initialize an UST context. | |
530 | * | |
531 | * Return pointer to structure or NULL. | |
532 | */ | |
533 | struct ltt_ust_context *trace_ust_create_context( | |
534 | struct lttng_event_context *ctx) | |
535 | { | |
536 | struct ltt_ust_context *uctx; | |
537 | int utype; | |
538 | ||
539 | assert(ctx); | |
540 | ||
541 | utype = trace_ust_context_type_event_to_ust(ctx->ctx); | |
542 | if (utype < 0) { | |
9197c5c4 MD |
543 | return NULL; |
544 | } | |
55cc08a6 DG |
545 | |
546 | uctx = zmalloc(sizeof(struct ltt_ust_context)); | |
547 | if (uctx == NULL) { | |
548 | PERROR("zmalloc ltt_ust_context"); | |
549 | goto error; | |
550 | } | |
551 | ||
aa3514e9 MD |
552 | uctx->ctx.ctx = (enum lttng_ust_context_type) utype; |
553 | switch (utype) { | |
554 | case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER: | |
555 | uctx->ctx.u.perf_counter.type = ctx->u.perf_counter.type; | |
556 | uctx->ctx.u.perf_counter.config = ctx->u.perf_counter.config; | |
557 | strncpy(uctx->ctx.u.perf_counter.name, ctx->u.perf_counter.name, | |
558 | LTTNG_UST_SYM_NAME_LEN); | |
559 | uctx->ctx.u.perf_counter.name[LTTNG_UST_SYM_NAME_LEN - 1] = '\0'; | |
560 | break; | |
561 | default: | |
562 | break; | |
563 | } | |
bec39940 | 564 | lttng_ht_node_init_ulong(&uctx->node, (unsigned long) uctx->ctx.ctx); |
55cc08a6 DG |
565 | |
566 | return uctx; | |
567 | ||
568 | error: | |
569 | return NULL; | |
570 | } | |
571 | ||
a9ad0c8f MD |
572 | static |
573 | void destroy_pid_tracker_node_rcu(struct rcu_head *head) | |
574 | { | |
575 | struct ust_pid_tracker_node *tracker_node = | |
576 | caa_container_of(head, struct ust_pid_tracker_node, node.head); | |
577 | free(tracker_node); | |
578 | } | |
579 | ||
580 | static | |
581 | void destroy_pid_tracker_node(struct ust_pid_tracker_node *tracker_node) | |
582 | { | |
583 | ||
584 | call_rcu(&tracker_node->node.head, destroy_pid_tracker_node_rcu); | |
585 | } | |
586 | ||
587 | static | |
588 | int init_pid_tracker(struct ust_pid_tracker *pid_tracker) | |
589 | { | |
590 | int ret = 0; | |
591 | ||
592 | pid_tracker->ht = lttng_ht_new(0, LTTNG_HT_TYPE_ULONG); | |
593 | if (!pid_tracker->ht) { | |
594 | ret = -1; | |
595 | goto end; | |
596 | } | |
597 | ||
598 | end: | |
599 | return ret; | |
600 | } | |
601 | ||
602 | /* | |
603 | * Teardown pid tracker content, but don't free pid_tracker object. | |
604 | */ | |
605 | static | |
606 | void fini_pid_tracker(struct ust_pid_tracker *pid_tracker) | |
607 | { | |
608 | struct ust_pid_tracker_node *tracker_node; | |
609 | struct lttng_ht_iter iter; | |
610 | ||
611 | if (!pid_tracker->ht) { | |
612 | return; | |
613 | } | |
614 | rcu_read_lock(); | |
615 | cds_lfht_for_each_entry(pid_tracker->ht->ht, | |
616 | &iter.iter, tracker_node, node.node) { | |
617 | int ret = lttng_ht_del(pid_tracker->ht, &iter); | |
618 | ||
619 | assert(!ret); | |
620 | destroy_pid_tracker_node(tracker_node); | |
621 | } | |
622 | rcu_read_unlock(); | |
623 | ht_cleanup_push(pid_tracker->ht); | |
624 | pid_tracker->ht = NULL; | |
625 | } | |
626 | ||
627 | static | |
628 | struct ust_pid_tracker_node *pid_tracker_lookup( | |
629 | struct ust_pid_tracker *pid_tracker, int pid, | |
630 | struct lttng_ht_iter *iter) | |
631 | { | |
632 | unsigned long _pid = (unsigned long) pid; | |
633 | struct lttng_ht_node_ulong *node; | |
634 | ||
635 | lttng_ht_lookup(pid_tracker->ht, (void *) _pid, iter); | |
636 | node = lttng_ht_iter_get_node_ulong(iter); | |
637 | if (node) { | |
638 | return caa_container_of(node, struct ust_pid_tracker_node, | |
639 | node); | |
640 | } else { | |
641 | return NULL; | |
642 | } | |
643 | } | |
644 | ||
645 | static | |
646 | int pid_tracker_add_pid(struct ust_pid_tracker *pid_tracker, int pid) | |
647 | { | |
648 | int retval = LTTNG_OK; | |
649 | struct ust_pid_tracker_node *tracker_node; | |
650 | struct lttng_ht_iter iter; | |
651 | ||
652 | if (pid < 0) { | |
653 | retval = LTTNG_ERR_INVALID; | |
654 | goto end; | |
655 | } | |
656 | tracker_node = pid_tracker_lookup(pid_tracker, pid, &iter); | |
657 | if (tracker_node) { | |
658 | /* Already exists. */ | |
b93a4a13 | 659 | retval = LTTNG_ERR_PID_TRACKED; |
a9ad0c8f MD |
660 | goto end; |
661 | } | |
662 | tracker_node = zmalloc(sizeof(*tracker_node)); | |
663 | if (!tracker_node) { | |
664 | retval = LTTNG_ERR_NOMEM; | |
665 | goto end; | |
666 | } | |
667 | lttng_ht_node_init_ulong(&tracker_node->node, (unsigned long) pid); | |
668 | lttng_ht_add_unique_ulong(pid_tracker->ht, &tracker_node->node); | |
669 | end: | |
670 | return retval; | |
671 | } | |
672 | ||
673 | static | |
674 | int pid_tracker_del_pid(struct ust_pid_tracker *pid_tracker, int pid) | |
675 | { | |
676 | int retval = LTTNG_OK, ret; | |
677 | struct ust_pid_tracker_node *tracker_node; | |
678 | struct lttng_ht_iter iter; | |
679 | ||
680 | if (pid < 0) { | |
681 | retval = LTTNG_ERR_INVALID; | |
682 | goto end; | |
683 | } | |
684 | tracker_node = pid_tracker_lookup(pid_tracker, pid, &iter); | |
685 | if (!tracker_node) { | |
686 | /* Not found */ | |
b93a4a13 | 687 | retval = LTTNG_ERR_PID_NOT_TRACKED; |
a9ad0c8f MD |
688 | goto end; |
689 | } | |
690 | ret = lttng_ht_del(pid_tracker->ht, &iter); | |
691 | assert(!ret); | |
692 | ||
693 | destroy_pid_tracker_node(tracker_node); | |
694 | end: | |
695 | return retval; | |
696 | } | |
697 | ||
698 | /* | |
699 | * The session lock is held when calling this function. | |
700 | */ | |
701 | int trace_ust_pid_tracker_lookup(struct ltt_ust_session *session, int pid) | |
702 | { | |
703 | struct lttng_ht_iter iter; | |
704 | ||
705 | if (!session->pid_tracker.ht) { | |
706 | return 1; | |
707 | } | |
708 | if (pid_tracker_lookup(&session->pid_tracker, pid, &iter)) { | |
709 | return 1; | |
710 | } | |
711 | return 0; | |
712 | } | |
713 | ||
714 | /* | |
715 | * Called with the session lock held. | |
716 | */ | |
717 | int trace_ust_track_pid(struct ltt_ust_session *session, int pid) | |
718 | { | |
719 | int retval = LTTNG_OK; | |
720 | ||
721 | if (pid == -1) { | |
722 | /* Track all pids: destroy tracker if exists. */ | |
723 | if (session->pid_tracker.ht) { | |
724 | fini_pid_tracker(&session->pid_tracker); | |
725 | /* Ensure all apps have session. */ | |
726 | ust_app_global_update_all(session); | |
727 | } | |
728 | } else { | |
729 | int ret; | |
730 | ||
731 | if (!session->pid_tracker.ht) { | |
732 | /* Create tracker. */ | |
733 | if (init_pid_tracker(&session->pid_tracker)) { | |
734 | ERR("Error initializing PID tracker"); | |
735 | retval = LTTNG_ERR_NOMEM; | |
736 | goto end; | |
737 | } | |
738 | ret = pid_tracker_add_pid(&session->pid_tracker, pid); | |
739 | if (ret != LTTNG_OK) { | |
740 | retval = ret; | |
741 | fini_pid_tracker(&session->pid_tracker); | |
742 | goto end; | |
743 | } | |
744 | /* Remove all apps from session except pid. */ | |
745 | ust_app_global_update_all(session); | |
746 | } else { | |
747 | struct ust_app *app; | |
748 | ||
749 | ret = pid_tracker_add_pid(&session->pid_tracker, pid); | |
750 | if (ret != LTTNG_OK) { | |
751 | retval = ret; | |
752 | goto end; | |
753 | } | |
754 | /* Add session to application */ | |
755 | app = ust_app_find_by_pid(pid); | |
756 | if (app) { | |
757 | ust_app_global_update(session, app); | |
758 | } | |
759 | } | |
760 | } | |
761 | end: | |
762 | return retval; | |
763 | } | |
764 | ||
765 | /* | |
766 | * Called with the session lock held. | |
767 | */ | |
768 | int trace_ust_untrack_pid(struct ltt_ust_session *session, int pid) | |
769 | { | |
770 | int retval = LTTNG_OK; | |
771 | ||
772 | if (pid == -1) { | |
773 | /* Create empty tracker, replace old tracker. */ | |
774 | struct ust_pid_tracker tmp_tracker; | |
775 | ||
776 | tmp_tracker = session->pid_tracker; | |
777 | if (init_pid_tracker(&session->pid_tracker)) { | |
778 | ERR("Error initializing PID tracker"); | |
779 | retval = LTTNG_ERR_NOMEM; | |
780 | /* Rollback operation. */ | |
781 | session->pid_tracker = tmp_tracker; | |
782 | goto end; | |
783 | } | |
784 | fini_pid_tracker(&tmp_tracker); | |
785 | ||
786 | /* Remove session from all applications */ | |
787 | ust_app_global_update_all(session); | |
788 | } else { | |
789 | int ret; | |
790 | struct ust_app *app; | |
791 | ||
792 | if (!session->pid_tracker.ht) { | |
b894343d JG |
793 | /* No PID being tracked. */ |
794 | retval = LTTNG_ERR_PID_NOT_TRACKED; | |
a9ad0c8f MD |
795 | goto end; |
796 | } | |
797 | /* Remove PID from tracker */ | |
798 | ret = pid_tracker_del_pid(&session->pid_tracker, pid); | |
799 | if (ret != LTTNG_OK) { | |
800 | retval = ret; | |
801 | goto end; | |
802 | } | |
803 | /* Remove session from application. */ | |
804 | app = ust_app_find_by_pid(pid); | |
805 | if (app) { | |
806 | ust_app_global_update(session, app); | |
807 | } | |
808 | } | |
809 | end: | |
810 | return retval; | |
811 | } | |
812 | ||
a5dfbb9d MD |
813 | /* |
814 | * Called with session lock held. | |
815 | */ | |
816 | ssize_t trace_ust_list_tracker_pids(struct ltt_ust_session *session, | |
817 | int32_t **_pids) | |
818 | { | |
819 | struct ust_pid_tracker_node *tracker_node; | |
820 | struct lttng_ht_iter iter; | |
821 | unsigned long count, i = 0; | |
822 | long approx[2]; | |
823 | int32_t *pids; | |
824 | int ret = 0; | |
825 | ||
826 | if (!session->pid_tracker.ht) { | |
827 | /* Tracker disabled. Set first entry to -1. */ | |
828 | pids = zmalloc(sizeof(*pids)); | |
829 | if (!pids) { | |
830 | ret = -1; | |
831 | goto end; | |
832 | } | |
833 | pids[0] = -1; | |
834 | *_pids = pids; | |
835 | return 1; | |
836 | } | |
837 | ||
838 | rcu_read_lock(); | |
839 | cds_lfht_count_nodes(session->pid_tracker.ht->ht, | |
840 | &approx[0], &count, &approx[1]); | |
841 | pids = zmalloc(sizeof(*pids) * count); | |
842 | if (!pids) { | |
843 | ret = -1; | |
844 | goto end; | |
845 | } | |
846 | cds_lfht_for_each_entry(session->pid_tracker.ht->ht, | |
847 | &iter.iter, tracker_node, node.node) { | |
848 | pids[i++] = tracker_node->node.key; | |
849 | } | |
850 | *_pids = pids; | |
851 | ret = count; | |
852 | end: | |
853 | rcu_read_unlock(); | |
854 | return ret; | |
855 | } | |
856 | ||
f6a9efaa DG |
857 | /* |
858 | * RCU safe free context structure. | |
859 | */ | |
860 | static void destroy_context_rcu(struct rcu_head *head) | |
861 | { | |
bec39940 DG |
862 | struct lttng_ht_node_ulong *node = |
863 | caa_container_of(head, struct lttng_ht_node_ulong, head); | |
f6a9efaa DG |
864 | struct ltt_ust_context *ctx = |
865 | caa_container_of(node, struct ltt_ust_context, node); | |
866 | ||
867 | free(ctx); | |
868 | } | |
869 | ||
870 | /* | |
871 | * Cleanup UST context hash table. | |
872 | */ | |
7bd39047 | 873 | static void destroy_contexts(struct lttng_ht *ht) |
f6a9efaa DG |
874 | { |
875 | int ret; | |
bec39940 DG |
876 | struct lttng_ht_node_ulong *node; |
877 | struct lttng_ht_iter iter; | |
31746f93 | 878 | struct ltt_ust_context *ctx; |
f6a9efaa | 879 | |
0525e9ae DG |
880 | assert(ht); |
881 | ||
36b588ed | 882 | rcu_read_lock(); |
bec39940 | 883 | cds_lfht_for_each_entry(ht->ht, &iter.iter, node, node) { |
31746f93 DG |
884 | /* Remove from ordered list. */ |
885 | ctx = caa_container_of(node, struct ltt_ust_context, node); | |
886 | cds_list_del(&ctx->list); | |
887 | /* Remove from channel's hash table. */ | |
bec39940 | 888 | ret = lttng_ht_del(ht, &iter); |
f6a9efaa DG |
889 | if (!ret) { |
890 | call_rcu(&node->head, destroy_context_rcu); | |
891 | } | |
f6a9efaa | 892 | } |
36b588ed | 893 | rcu_read_unlock(); |
ed52805d | 894 | |
0b2dc8df | 895 | ht_cleanup_push(ht); |
f6a9efaa DG |
896 | } |
897 | ||
97ee3a89 DG |
898 | /* |
899 | * Cleanup ust event structure. | |
900 | */ | |
901 | void trace_ust_destroy_event(struct ltt_ust_event *event) | |
902 | { | |
0525e9ae DG |
903 | assert(event); |
904 | ||
f6a9efaa | 905 | DBG2("Trace destroy UST event %s", event->attr.name); |
6b453b5e | 906 | free(event->filter_expression); |
53a80697 | 907 | free(event->filter); |
40024f8a | 908 | free(event->exclusion); |
97ee3a89 DG |
909 | free(event); |
910 | } | |
911 | ||
f6a9efaa DG |
912 | /* |
913 | * URCU intermediate call to complete destroy event. | |
914 | */ | |
915 | static void destroy_event_rcu(struct rcu_head *head) | |
916 | { | |
bec39940 DG |
917 | struct lttng_ht_node_str *node = |
918 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
919 | struct ltt_ust_event *event = |
920 | caa_container_of(node, struct ltt_ust_event, node); | |
921 | ||
922 | trace_ust_destroy_event(event); | |
923 | } | |
924 | ||
284d8f55 DG |
925 | /* |
926 | * Cleanup UST events hashtable. | |
927 | */ | |
7bd39047 | 928 | static void destroy_events(struct lttng_ht *events) |
ed52805d DG |
929 | { |
930 | int ret; | |
bec39940 DG |
931 | struct lttng_ht_node_str *node; |
932 | struct lttng_ht_iter iter; | |
ed52805d | 933 | |
0525e9ae DG |
934 | assert(events); |
935 | ||
36b588ed | 936 | rcu_read_lock(); |
bec39940 DG |
937 | cds_lfht_for_each_entry(events->ht, &iter.iter, node, node) { |
938 | ret = lttng_ht_del(events, &iter); | |
7bd39047 DG |
939 | assert(!ret); |
940 | call_rcu(&node->head, destroy_event_rcu); | |
ed52805d | 941 | } |
36b588ed | 942 | rcu_read_unlock(); |
ed52805d | 943 | |
0b2dc8df | 944 | ht_cleanup_push(events); |
ed52805d DG |
945 | } |
946 | ||
97ee3a89 DG |
947 | /* |
948 | * Cleanup ust channel structure. | |
36b588ed MD |
949 | * |
950 | * Should _NOT_ be called with RCU read lock held. | |
97ee3a89 | 951 | */ |
36b588ed | 952 | static void _trace_ust_destroy_channel(struct ltt_ust_channel *channel) |
97ee3a89 | 953 | { |
0525e9ae DG |
954 | assert(channel); |
955 | ||
f6a9efaa | 956 | DBG2("Trace destroy UST channel %s", channel->name); |
97ee3a89 | 957 | |
97ee3a89 | 958 | free(channel); |
f6a9efaa DG |
959 | } |
960 | ||
961 | /* | |
962 | * URCU intermediate call to complete destroy channel. | |
963 | */ | |
964 | static void destroy_channel_rcu(struct rcu_head *head) | |
965 | { | |
bec39940 DG |
966 | struct lttng_ht_node_str *node = |
967 | caa_container_of(head, struct lttng_ht_node_str, head); | |
f6a9efaa DG |
968 | struct ltt_ust_channel *channel = |
969 | caa_container_of(node, struct ltt_ust_channel, node); | |
970 | ||
36b588ed MD |
971 | _trace_ust_destroy_channel(channel); |
972 | } | |
973 | ||
974 | void trace_ust_destroy_channel(struct ltt_ust_channel *channel) | |
975 | { | |
627cbbe7 MD |
976 | /* Destroying all events of the channel */ |
977 | destroy_events(channel->events); | |
978 | /* Destroying all context of the channel */ | |
979 | destroy_contexts(channel->ctx); | |
980 | ||
36b588ed | 981 | call_rcu(&channel->node.head, destroy_channel_rcu); |
97ee3a89 DG |
982 | } |
983 | ||
d5979e4a DG |
984 | /* |
985 | * Remove an UST channel from a channel HT. | |
986 | */ | |
987 | void trace_ust_delete_channel(struct lttng_ht *ht, | |
988 | struct ltt_ust_channel *channel) | |
989 | { | |
990 | int ret; | |
991 | struct lttng_ht_iter iter; | |
992 | ||
993 | assert(ht); | |
994 | assert(channel); | |
995 | ||
996 | iter.iter.node = &channel->node.node; | |
997 | ret = lttng_ht_del(ht, &iter); | |
998 | assert(!ret); | |
999 | } | |
1000 | ||
97ee3a89 | 1001 | /* |
f6a9efaa | 1002 | * Iterate over a hash table containing channels and cleanup safely. |
97ee3a89 | 1003 | */ |
bec39940 | 1004 | static void destroy_channels(struct lttng_ht *channels) |
f6a9efaa | 1005 | { |
bec39940 DG |
1006 | struct lttng_ht_node_str *node; |
1007 | struct lttng_ht_iter iter; | |
f6a9efaa | 1008 | |
0525e9ae DG |
1009 | assert(channels); |
1010 | ||
24d1723f | 1011 | rcu_read_lock(); |
bec39940 | 1012 | cds_lfht_for_each_entry(channels->ht, &iter.iter, node, node) { |
627cbbe7 MD |
1013 | struct ltt_ust_channel *chan = |
1014 | caa_container_of(node, struct ltt_ust_channel, node); | |
1015 | ||
1016 | trace_ust_delete_channel(channels, chan); | |
1017 | trace_ust_destroy_channel(chan); | |
f6a9efaa | 1018 | } |
36b588ed | 1019 | rcu_read_unlock(); |
ed52805d | 1020 | |
0b2dc8df | 1021 | ht_cleanup_push(channels); |
f6a9efaa DG |
1022 | } |
1023 | ||
f6a9efaa DG |
1024 | /* |
1025 | * Cleanup UST global domain. | |
1026 | */ | |
1027 | static void destroy_domain_global(struct ltt_ust_domain_global *dom) | |
1028 | { | |
0525e9ae DG |
1029 | assert(dom); |
1030 | ||
f6a9efaa DG |
1031 | destroy_channels(dom->channels); |
1032 | } | |
97ee3a89 | 1033 | |
f6a9efaa DG |
1034 | /* |
1035 | * Cleanup ust session structure | |
36b588ed MD |
1036 | * |
1037 | * Should *NOT* be called with RCU read-side lock held. | |
f6a9efaa DG |
1038 | */ |
1039 | void trace_ust_destroy_session(struct ltt_ust_session *session) | |
1040 | { | |
fefd409b | 1041 | struct agent *agt; |
7972aab2 | 1042 | struct buffer_reg_uid *reg, *sreg; |
fefd409b | 1043 | struct lttng_ht_iter iter; |
7972aab2 | 1044 | |
0525e9ae | 1045 | assert(session); |
97ee3a89 | 1046 | |
d9bf3ca4 | 1047 | DBG2("Trace UST destroy session %" PRIu64, session->id); |
f6a9efaa | 1048 | |
f6a9efaa DG |
1049 | /* Cleaning up UST domain */ |
1050 | destroy_domain_global(&session->domain_global); | |
fefd409b | 1051 | |
0c0fcd77 | 1052 | rcu_read_lock(); |
fefd409b | 1053 | cds_lfht_for_each_entry(session->agents->ht, &iter.iter, agt, node.node) { |
d0edf546 JG |
1054 | int ret = lttng_ht_del(session->agents, &iter); |
1055 | ||
1056 | assert(!ret); | |
fefd409b DG |
1057 | agent_destroy(agt); |
1058 | } | |
0c0fcd77 | 1059 | rcu_read_unlock(); |
7972aab2 | 1060 | |
8ada2175 MD |
1061 | ht_cleanup_push(session->agents); |
1062 | ||
7972aab2 DG |
1063 | /* Cleanup UID buffer registry object(s). */ |
1064 | cds_list_for_each_entry_safe(reg, sreg, &session->buffer_reg_uid_list, | |
1065 | lnode) { | |
1066 | cds_list_del(®->lnode); | |
1067 | buffer_reg_uid_remove(reg); | |
1068 | buffer_reg_uid_destroy(reg, session->consumer); | |
1069 | } | |
44d3bd01 | 1070 | |
6addfa37 | 1071 | consumer_output_put(session->consumer); |
3f8e211f | 1072 | |
a9ad0c8f MD |
1073 | fini_pid_tracker(&session->pid_tracker); |
1074 | ||
97ee3a89 DG |
1075 | free(session); |
1076 | } |