Commit | Line | Data |
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8020ceb5 | 1 | /* |
c0c0989a | 2 | * SPDX-License-Identifier: LGPL-2.1-only |
8020ceb5 | 3 | * |
e92f3e28 MD |
4 | * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> |
5 | * | |
c0c0989a | 6 | * Holds LTTng per-session event registry. |
8020ceb5 MD |
7 | */ |
8 | ||
3fbec7dc | 9 | #define _LGPL_SOURCE |
b5234c06 | 10 | #include <stdio.h> |
d8d2416d | 11 | #include <assert.h> |
b5234c06 | 12 | #include <errno.h> |
d8d2416d FD |
13 | #include <limits.h> |
14 | #include <pthread.h> | |
f4681817 MD |
15 | #include <sys/shm.h> |
16 | #include <sys/ipc.h> | |
44c72f10 MD |
17 | #include <stdint.h> |
18 | #include <stddef.h> | |
28b12049 MD |
19 | #include <inttypes.h> |
20 | #include <time.h> | |
196ec2df | 21 | #include <stdbool.h> |
d8d2416d | 22 | #include <unistd.h> |
10544ee8 | 23 | #include <dlfcn.h> |
2ae57758 | 24 | #include <lttng/ust-endian.h> |
44c72f10 | 25 | |
d8d2416d | 26 | #include <urcu/arch.h> |
44c72f10 | 27 | #include <urcu/compiler.h> |
d8d2416d FD |
28 | #include <urcu/hlist.h> |
29 | #include <urcu/list.h> | |
44c72f10 | 30 | #include <urcu/uatomic.h> |
44c72f10 MD |
31 | |
32 | #include <lttng/tracepoint.h> | |
4318ae1b | 33 | #include <lttng/ust-events.h> |
44c72f10 | 34 | |
9d315d6d MJ |
35 | #include "common/logging.h" |
36 | #include "common/macros.h" | |
7d3e35b6 | 37 | #include <lttng/ust-ctl.h> |
9d315d6d MJ |
38 | #include "common/ustcomm.h" |
39 | #include "common/ust-fd.h" | |
40 | #include "common/dynamic-type.h" | |
41 | #include "common/ust-context-provider.h" | |
eda498b8 | 42 | #include "lttng-ust-uuid.h" |
44c72f10 | 43 | |
8f51c684 | 44 | #include "common/tracepoint.h" |
b8aa6f43 | 45 | #include "common/strutils.h" |
4d451c15 | 46 | #include "lttng-bytecode.h" |
7dd08bec MD |
47 | #include "lttng-tracer.h" |
48 | #include "lttng-tracer-core.h" | |
cf73e0fe | 49 | #include "lttng-ust-statedump.h" |
51f804ec | 50 | #include "context-internal.h" |
36c52fff | 51 | #include "lib/lttng-ust/events.h" |
e4db8f98 MJ |
52 | #include "common/ringbuffer/shm.h" |
53 | #include "common/ringbuffer/frontend_types.h" | |
54 | #include "common/ringbuffer/frontend.h" | |
cdff92e0 | 55 | #include "common/counter/counter.h" |
e58e5ad5 | 56 | #include "common/jhash.h" |
d8d2416d | 57 | #include <lttng/ust-abi.h> |
4b4a1337 | 58 | #include "context-provider-internal.h" |
8165c8da MD |
59 | |
60 | /* | |
3327ac33 MD |
61 | * All operations within this file are called by the communication |
62 | * thread, under ust_lock protection. | |
8165c8da | 63 | */ |
8165c8da | 64 | |
b5234c06 | 65 | static CDS_LIST_HEAD(sessions); |
d8d2416d | 66 | static CDS_LIST_HEAD(event_notifier_groups); |
8165c8da | 67 | |
7753d283 | 68 | struct cds_list_head *lttng_get_sessions(void) |
37dddb65 MD |
69 | { |
70 | return &sessions; | |
71 | } | |
72 | ||
ba99fbe2 | 73 | static void _lttng_event_destroy(struct lttng_ust_event_common *event); |
c785c634 | 74 | static void _lttng_enum_destroy(struct lttng_enum *_enum); |
8020ceb5 | 75 | |
e58095ef | 76 | static |
f69fe5fb | 77 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 78 | static |
f69fe5fb | 79 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session); |
e58095ef | 80 | static |
d8d2416d FD |
81 | void lttng_event_notifier_group_sync_enablers( |
82 | struct lttng_event_notifier_group *event_notifier_group); | |
83 | static | |
e58095ef MD |
84 | void lttng_enabler_destroy(struct lttng_enabler *enabler); |
85 | ||
5b4c6da4 MD |
86 | bool lttng_ust_validate_event_name(const struct lttng_ust_event_desc *desc) |
87 | { | |
88 | if (strlen(desc->probe_desc->provider_name) + 1 + | |
89 | strlen(desc->event_name) >= LTTNG_UST_ABI_SYM_NAME_LEN) | |
90 | return false; | |
91 | return true; | |
92 | } | |
93 | ||
94 | void lttng_ust_format_event_name(const struct lttng_ust_event_desc *desc, | |
95 | char *name) | |
96 | { | |
97 | strcpy(name, desc->probe_desc->provider_name); | |
98 | strcat(name, ":"); | |
99 | strcat(name, desc->event_name); | |
100 | } | |
101 | ||
6715d7d1 MD |
102 | /* |
103 | * Called with ust lock held. | |
104 | */ | |
105 | int lttng_session_active(void) | |
106 | { | |
bdb12629 | 107 | struct lttng_ust_session_private *iter; |
6715d7d1 MD |
108 | |
109 | cds_list_for_each_entry(iter, &sessions, node) { | |
bdb12629 | 110 | if (iter->pub->active) |
6715d7d1 MD |
111 | return 1; |
112 | } | |
113 | return 0; | |
114 | } | |
115 | ||
e58095ef MD |
116 | static |
117 | int lttng_loglevel_match(int loglevel, | |
118 | unsigned int has_loglevel, | |
fd17d7ce | 119 | enum lttng_ust_abi_loglevel_type req_type, |
457a6b58 MD |
120 | int req_loglevel) |
121 | { | |
e58095ef | 122 | if (!has_loglevel) |
612e9ce4 | 123 | loglevel = LTTNG_UST_TRACEPOINT_LOGLEVEL_DEFAULT; |
457a6b58 | 124 | switch (req_type) { |
fd17d7ce | 125 | case LTTNG_UST_ABI_LOGLEVEL_RANGE: |
aacb3774 | 126 | if (loglevel <= req_loglevel |
612e9ce4 | 127 | || (req_loglevel == -1 && loglevel <= LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG)) |
457a6b58 MD |
128 | return 1; |
129 | else | |
130 | return 0; | |
fd17d7ce | 131 | case LTTNG_UST_ABI_LOGLEVEL_SINGLE: |
aacb3774 | 132 | if (loglevel == req_loglevel |
612e9ce4 | 133 | || (req_loglevel == -1 && loglevel <= LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG)) |
457a6b58 MD |
134 | return 1; |
135 | else | |
136 | return 0; | |
fd17d7ce | 137 | case LTTNG_UST_ABI_LOGLEVEL_ALL: |
457a6b58 | 138 | default: |
612e9ce4 | 139 | if (loglevel <= LTTNG_UST_TRACEPOINT_LOGLEVEL_DEBUG) |
aacb3774 MD |
140 | return 1; |
141 | else | |
142 | return 0; | |
457a6b58 MD |
143 | } |
144 | } | |
145 | ||
f69fe5fb | 146 | struct lttng_ust_session *lttng_session_create(void) |
8020ceb5 | 147 | { |
f69fe5fb | 148 | struct lttng_ust_session *session; |
bdb12629 | 149 | struct lttng_ust_session_private *session_priv; |
74d81a6c | 150 | int i; |
8020ceb5 | 151 | |
f69fe5fb | 152 | session = zmalloc(sizeof(struct lttng_ust_session)); |
8020ceb5 MD |
153 | if (!session) |
154 | return NULL; | |
f69fe5fb | 155 | session->struct_size = sizeof(struct lttng_ust_session); |
bdb12629 MD |
156 | session_priv = zmalloc(sizeof(struct lttng_ust_session_private)); |
157 | if (!session_priv) { | |
53569322 MD |
158 | free(session); |
159 | return NULL; | |
160 | } | |
bdb12629 MD |
161 | session->priv = session_priv; |
162 | session_priv->pub = session; | |
163 | if (lttng_context_init_all(&session->priv->ctx)) { | |
164 | free(session_priv); | |
165 | free(session); | |
166 | return NULL; | |
167 | } | |
168 | CDS_INIT_LIST_HEAD(&session->priv->chan_head); | |
169 | CDS_INIT_LIST_HEAD(&session->priv->events_head); | |
170 | CDS_INIT_LIST_HEAD(&session->priv->enums_head); | |
171 | CDS_INIT_LIST_HEAD(&session->priv->enablers_head); | |
d56fa719 | 172 | for (i = 0; i < LTTNG_UST_EVENT_HT_SIZE; i++) |
bdb12629 | 173 | CDS_INIT_HLIST_HEAD(&session->priv->events_ht.table[i]); |
c785c634 | 174 | for (i = 0; i < LTTNG_UST_ENUM_HT_SIZE; i++) |
bdb12629 MD |
175 | CDS_INIT_HLIST_HEAD(&session->priv->enums_ht.table[i]); |
176 | cds_list_add(&session->priv->node, &sessions); | |
8020ceb5 MD |
177 | return session; |
178 | } | |
179 | ||
ebabbf58 MD |
180 | struct lttng_counter *lttng_ust_counter_create( |
181 | const char *counter_transport_name, | |
182 | size_t number_dimensions, const struct lttng_counter_dimension *dimensions) | |
183 | { | |
184 | struct lttng_counter_transport *counter_transport = NULL; | |
185 | struct lttng_counter *counter = NULL; | |
186 | ||
187 | counter_transport = lttng_counter_transport_find(counter_transport_name); | |
188 | if (!counter_transport) | |
189 | goto notransport; | |
190 | counter = zmalloc(sizeof(struct lttng_counter)); | |
191 | if (!counter) | |
192 | goto nomem; | |
193 | ||
194 | counter->ops = &counter_transport->ops; | |
195 | counter->transport = counter_transport; | |
196 | ||
197 | counter->counter = counter->ops->counter_create( | |
198 | number_dimensions, dimensions, 0, | |
199 | -1, 0, NULL, false); | |
200 | if (!counter->counter) { | |
201 | goto create_error; | |
202 | } | |
203 | ||
204 | return counter; | |
205 | ||
206 | create_error: | |
207 | free(counter); | |
208 | nomem: | |
209 | notransport: | |
210 | return NULL; | |
211 | } | |
212 | ||
213 | static | |
214 | void lttng_ust_counter_destroy(struct lttng_counter *counter) | |
215 | { | |
216 | counter->ops->counter_destroy(counter->counter); | |
217 | free(counter); | |
218 | } | |
219 | ||
d8d2416d FD |
220 | struct lttng_event_notifier_group *lttng_event_notifier_group_create(void) |
221 | { | |
222 | struct lttng_event_notifier_group *event_notifier_group; | |
223 | int i; | |
224 | ||
225 | event_notifier_group = zmalloc(sizeof(struct lttng_event_notifier_group)); | |
226 | if (!event_notifier_group) | |
227 | return NULL; | |
228 | ||
51f804ec FD |
229 | /* Add all contexts. */ |
230 | if (lttng_context_init_all(&event_notifier_group->ctx)) { | |
231 | free(event_notifier_group); | |
232 | return NULL; | |
233 | } | |
234 | ||
d8d2416d FD |
235 | CDS_INIT_LIST_HEAD(&event_notifier_group->enablers_head); |
236 | CDS_INIT_LIST_HEAD(&event_notifier_group->event_notifiers_head); | |
237 | for (i = 0; i < LTTNG_UST_EVENT_NOTIFIER_HT_SIZE; i++) | |
238 | CDS_INIT_HLIST_HEAD(&event_notifier_group->event_notifiers_ht.table[i]); | |
239 | ||
240 | cds_list_add(&event_notifier_group->node, &event_notifier_groups); | |
241 | ||
242 | return event_notifier_group; | |
243 | } | |
244 | ||
74d81a6c MD |
245 | /* |
246 | * Only used internally at session destruction. | |
247 | */ | |
248 | static | |
e7bc0ef6 | 249 | void _lttng_channel_unmap(struct lttng_ust_channel_buffer *lttng_chan) |
74d81a6c | 250 | { |
b5457df5 | 251 | struct lttng_ust_ring_buffer_channel *chan; |
74d81a6c MD |
252 | struct lttng_ust_shm_handle *handle; |
253 | ||
e7bc0ef6 | 254 | cds_list_del(<tng_chan->priv->node); |
0950190a | 255 | lttng_destroy_context(lttng_chan->priv->ctx); |
07539b34 | 256 | chan = lttng_chan->priv->rb_chan; |
3b5babf8 | 257 | handle = chan->handle; |
74d81a6c | 258 | channel_destroy(chan, handle, 0); |
e7bc0ef6 MD |
259 | free(lttng_chan->parent); |
260 | free(lttng_chan->priv); | |
f0fde1c3 | 261 | free(lttng_chan); |
74d81a6c MD |
262 | } |
263 | ||
ac6b4ac6 | 264 | static |
ba99fbe2 | 265 | void register_event(struct lttng_ust_event_common *event) |
ac6b4ac6 MD |
266 | { |
267 | int ret; | |
4e48b5d2 | 268 | const struct lttng_ust_event_desc *desc; |
ac6b4ac6 | 269 | |
ba99fbe2 MD |
270 | assert(event->priv->registered == 0); |
271 | desc = event->priv->desc; | |
34f7f142 MD |
272 | ret = lttng_ust_tp_probe_register_queue_release(desc->probe_desc->provider_name, |
273 | desc->event_name, | |
ac6b4ac6 | 274 | desc->probe_callback, |
ba99fbe2 | 275 | event, desc->signature); |
ac6b4ac6 MD |
276 | WARN_ON_ONCE(ret); |
277 | if (!ret) | |
ba99fbe2 | 278 | event->priv->registered = 1; |
ac6b4ac6 MD |
279 | } |
280 | ||
d8d2416d | 281 | static |
ba99fbe2 | 282 | void unregister_event(struct lttng_ust_event_common *event) |
d8d2416d FD |
283 | { |
284 | int ret; | |
4e48b5d2 | 285 | const struct lttng_ust_event_desc *desc; |
d8d2416d | 286 | |
ba99fbe2 MD |
287 | assert(event->priv->registered == 1); |
288 | desc = event->priv->desc; | |
34f7f142 MD |
289 | ret = lttng_ust_tp_probe_unregister_queue_release(desc->probe_desc->provider_name, |
290 | desc->event_name, | |
ac6b4ac6 | 291 | desc->probe_callback, |
ba99fbe2 | 292 | event); |
ac6b4ac6 MD |
293 | WARN_ON_ONCE(ret); |
294 | if (!ret) | |
ba99fbe2 | 295 | event->priv->registered = 0; |
ac6b4ac6 MD |
296 | } |
297 | ||
d8d2416d | 298 | static |
ba99fbe2 | 299 | void _lttng_event_unregister(struct lttng_ust_event_common *event) |
d8d2416d | 300 | { |
ba99fbe2 MD |
301 | if (event->priv->registered) |
302 | unregister_event(event); | |
d8d2416d FD |
303 | } |
304 | ||
f69fe5fb | 305 | void lttng_session_destroy(struct lttng_ust_session *session) |
8020ceb5 | 306 | { |
e7bc0ef6 | 307 | struct lttng_ust_channel_buffer_private *chan, *tmpchan; |
2e70391c | 308 | struct lttng_ust_event_recorder_private *event_recorder_priv, *tmpevent_recorder_priv; |
c785c634 | 309 | struct lttng_enum *_enum, *tmp_enum; |
d871c65b | 310 | struct lttng_event_enabler *event_enabler, *event_tmpenabler; |
8020ceb5 | 311 | |
b5234c06 | 312 | CMM_ACCESS_ONCE(session->active) = 0; |
2e70391c | 313 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
ba99fbe2 | 314 | _lttng_event_unregister(event_recorder_priv->parent.pub); |
8020ceb5 | 315 | } |
b653ddc1 | 316 | lttng_ust_urcu_synchronize_rcu(); /* Wait for in-flight events to complete */ |
d10a2205 | 317 | lttng_ust_tp_probe_prune_release_queue(); |
d871c65b | 318 | cds_list_for_each_entry_safe(event_enabler, event_tmpenabler, |
bdb12629 | 319 | &session->priv->enablers_head, node) |
d871c65b | 320 | lttng_event_enabler_destroy(event_enabler); |
2e70391c | 321 | cds_list_for_each_entry_safe(event_recorder_priv, tmpevent_recorder_priv, |
bdb12629 | 322 | &session->priv->events_head, node) |
ba99fbe2 | 323 | _lttng_event_destroy(event_recorder_priv->parent.pub); |
c785c634 | 324 | cds_list_for_each_entry_safe(_enum, tmp_enum, |
bdb12629 | 325 | &session->priv->enums_head, node) |
c785c634 | 326 | _lttng_enum_destroy(_enum); |
bdb12629 | 327 | cds_list_for_each_entry_safe(chan, tmpchan, &session->priv->chan_head, node) |
e7bc0ef6 | 328 | _lttng_channel_unmap(chan->pub); |
bdb12629 MD |
329 | cds_list_del(&session->priv->node); |
330 | lttng_destroy_context(session->priv->ctx); | |
331 | free(session->priv); | |
b5234c06 | 332 | free(session); |
8020ceb5 MD |
333 | } |
334 | ||
d8d2416d FD |
335 | void lttng_event_notifier_group_destroy( |
336 | struct lttng_event_notifier_group *event_notifier_group) | |
337 | { | |
338 | int close_ret; | |
339 | struct lttng_event_notifier_enabler *notifier_enabler, *tmpnotifier_enabler; | |
ba99fbe2 | 340 | struct lttng_ust_event_notifier_private *event_notifier_priv, *tmpevent_notifier_priv; |
d8d2416d FD |
341 | |
342 | if (!event_notifier_group) { | |
343 | return; | |
344 | } | |
345 | ||
ba99fbe2 | 346 | cds_list_for_each_entry(event_notifier_priv, |
d8d2416d | 347 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 348 | _lttng_event_unregister(event_notifier_priv->parent.pub); |
d8d2416d | 349 | |
b653ddc1 | 350 | lttng_ust_urcu_synchronize_rcu(); |
d8d2416d FD |
351 | |
352 | cds_list_for_each_entry_safe(notifier_enabler, tmpnotifier_enabler, | |
353 | &event_notifier_group->enablers_head, node) | |
354 | lttng_event_notifier_enabler_destroy(notifier_enabler); | |
355 | ||
ba99fbe2 | 356 | cds_list_for_each_entry_safe(event_notifier_priv, tmpevent_notifier_priv, |
d8d2416d | 357 | &event_notifier_group->event_notifiers_head, node) |
ba99fbe2 | 358 | _lttng_event_destroy(event_notifier_priv->parent.pub); |
d8d2416d | 359 | |
ebabbf58 MD |
360 | if (event_notifier_group->error_counter) |
361 | lttng_ust_counter_destroy(event_notifier_group->error_counter); | |
362 | ||
363 | /* Close the notification fd to the listener of event_notifiers. */ | |
d8d2416d FD |
364 | |
365 | lttng_ust_lock_fd_tracker(); | |
366 | close_ret = close(event_notifier_group->notification_fd); | |
367 | if (!close_ret) { | |
368 | lttng_ust_delete_fd_from_tracker( | |
369 | event_notifier_group->notification_fd); | |
370 | } else { | |
371 | PERROR("close"); | |
372 | abort(); | |
373 | } | |
374 | lttng_ust_unlock_fd_tracker(); | |
375 | ||
376 | cds_list_del(&event_notifier_group->node); | |
bd515d28 | 377 | lttng_destroy_context(event_notifier_group->ctx); |
d8d2416d FD |
378 | free(event_notifier_group); |
379 | } | |
380 | ||
d871c65b FD |
381 | static |
382 | void lttng_enabler_destroy(struct lttng_enabler *enabler) | |
383 | { | |
ab249ecf | 384 | struct lttng_ust_bytecode_node *filter_node, *tmp_filter_node; |
d871c65b FD |
385 | struct lttng_ust_excluder_node *excluder_node, *tmp_excluder_node; |
386 | ||
387 | if (!enabler) { | |
388 | return; | |
389 | } | |
390 | ||
391 | /* Destroy filter bytecode */ | |
392 | cds_list_for_each_entry_safe(filter_node, tmp_filter_node, | |
393 | &enabler->filter_bytecode_head, node) { | |
394 | free(filter_node); | |
395 | } | |
396 | ||
397 | /* Destroy excluders */ | |
398 | cds_list_for_each_entry_safe(excluder_node, tmp_excluder_node, | |
399 | &enabler->excluder_head, node) { | |
400 | free(excluder_node); | |
401 | } | |
402 | } | |
403 | ||
d8d2416d FD |
404 | void lttng_event_notifier_enabler_destroy(struct lttng_event_notifier_enabler *event_notifier_enabler) |
405 | { | |
406 | if (!event_notifier_enabler) { | |
407 | return; | |
408 | } | |
409 | ||
410 | cds_list_del(&event_notifier_enabler->node); | |
411 | ||
412 | lttng_enabler_destroy(lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); | |
413 | ||
414 | free(event_notifier_enabler); | |
415 | } | |
416 | ||
53569322 | 417 | static |
4e48b5d2 | 418 | int lttng_enum_create(const struct lttng_ust_enum_desc *desc, |
f69fe5fb | 419 | struct lttng_ust_session *session) |
53569322 MD |
420 | { |
421 | const char *enum_name = desc->name; | |
422 | struct lttng_enum *_enum; | |
423 | struct cds_hlist_head *head; | |
53569322 MD |
424 | int ret = 0; |
425 | size_t name_len = strlen(enum_name); | |
426 | uint32_t hash; | |
427 | int notify_socket; | |
428 | ||
b33b46f7 | 429 | /* Check if this enum is already registered for this session. */ |
53569322 | 430 | hash = jhash(enum_name, name_len, 0); |
bdb12629 | 431 | head = &session->priv->enums_ht.table[hash & (LTTNG_UST_ENUM_HT_SIZE - 1)]; |
b33b46f7 FD |
432 | |
433 | _enum = lttng_ust_enum_get_from_desc(session, desc); | |
434 | if (_enum) { | |
435 | ret = -EEXIST; | |
436 | goto exist; | |
53569322 MD |
437 | } |
438 | ||
bdb12629 | 439 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
53569322 MD |
440 | if (notify_socket < 0) { |
441 | ret = notify_socket; | |
442 | goto socket_error; | |
443 | } | |
444 | ||
445 | _enum = zmalloc(sizeof(*_enum)); | |
446 | if (!_enum) { | |
447 | ret = -ENOMEM; | |
448 | goto cache_error; | |
449 | } | |
450 | _enum->session = session; | |
451 | _enum->desc = desc; | |
452 | ||
453 | ret = ustcomm_register_enum(notify_socket, | |
bdb12629 | 454 | session->priv->objd, |
53569322 MD |
455 | enum_name, |
456 | desc->nr_entries, | |
457 | desc->entries, | |
458 | &_enum->id); | |
459 | if (ret < 0) { | |
460 | DBG("Error (%d) registering enumeration to sessiond", ret); | |
461 | goto sessiond_register_error; | |
462 | } | |
bdb12629 | 463 | cds_list_add(&_enum->node, &session->priv->enums_head); |
53569322 MD |
464 | cds_hlist_add_head(&_enum->hlist, head); |
465 | return 0; | |
466 | ||
467 | sessiond_register_error: | |
468 | free(_enum); | |
469 | cache_error: | |
470 | socket_error: | |
471 | exist: | |
472 | return ret; | |
473 | } | |
474 | ||
475 | static | |
4e48b5d2 | 476 | int lttng_create_enum_check(const struct lttng_ust_type_common *type, |
f69fe5fb | 477 | struct lttng_ust_session *session) |
53569322 | 478 | { |
a084756d MD |
479 | switch (type->type) { |
480 | case lttng_ust_type_enum: | |
218deb69 | 481 | { |
4e48b5d2 | 482 | const struct lttng_ust_enum_desc *enum_desc; |
218deb69 MD |
483 | int ret; |
484 | ||
a084756d | 485 | enum_desc = lttng_ust_get_type_enum(type)->desc; |
53569322 MD |
486 | ret = lttng_enum_create(enum_desc, session); |
487 | if (ret && ret != -EEXIST) { | |
488 | DBG("Unable to create enum error: (%d)", ret); | |
489 | return ret; | |
490 | } | |
491 | break; | |
492 | } | |
a084756d | 493 | case lttng_ust_type_dynamic: |
53569322 | 494 | { |
4e48b5d2 MD |
495 | const struct lttng_ust_event_field *tag_field_generic; |
496 | const struct lttng_ust_enum_desc *enum_desc; | |
53569322 MD |
497 | int ret; |
498 | ||
499 | tag_field_generic = lttng_ust_dynamic_type_tag_field(); | |
a084756d | 500 | enum_desc = lttng_ust_get_type_enum(tag_field_generic->type)->desc; |
53569322 MD |
501 | ret = lttng_enum_create(enum_desc, session); |
502 | if (ret && ret != -EEXIST) { | |
503 | DBG("Unable to create enum error: (%d)", ret); | |
504 | return ret; | |
505 | } | |
506 | break; | |
507 | } | |
508 | default: | |
509 | /* TODO: nested types when they become supported. */ | |
510 | break; | |
511 | } | |
512 | return 0; | |
513 | } | |
514 | ||
515 | static | |
516 | int lttng_create_all_event_enums(size_t nr_fields, | |
3d33ca1d | 517 | const struct lttng_ust_event_field * const *event_fields, |
f69fe5fb | 518 | struct lttng_ust_session *session) |
53569322 MD |
519 | { |
520 | size_t i; | |
521 | int ret; | |
522 | ||
523 | /* For each field, ensure enum is part of the session. */ | |
524 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 525 | const struct lttng_ust_type_common *type = event_fields[i]->type; |
53569322 MD |
526 | |
527 | ret = lttng_create_enum_check(type, session); | |
528 | if (ret) | |
529 | return ret; | |
530 | } | |
531 | return 0; | |
532 | } | |
533 | ||
534 | static | |
535 | int lttng_create_all_ctx_enums(size_t nr_fields, | |
4e48b5d2 | 536 | struct lttng_ust_ctx_field *ctx_fields, |
f69fe5fb | 537 | struct lttng_ust_session *session) |
53569322 MD |
538 | { |
539 | size_t i; | |
540 | int ret; | |
541 | ||
542 | /* For each field, ensure enum is part of the session. */ | |
543 | for (i = 0; i < nr_fields; i++) { | |
4e48b5d2 | 544 | const struct lttng_ust_type_common *type = ctx_fields[i].event_field->type; |
53569322 MD |
545 | |
546 | ret = lttng_create_enum_check(type, session); | |
547 | if (ret) | |
548 | return ret; | |
549 | } | |
550 | return 0; | |
551 | } | |
552 | ||
710b8ee3 MD |
553 | /* |
554 | * Ensure that a state-dump will be performed for this session at the end | |
555 | * of the current handle_message(). | |
556 | */ | |
f69fe5fb | 557 | int lttng_session_statedump(struct lttng_ust_session *session) |
710b8ee3 | 558 | { |
bdb12629 MD |
559 | session->priv->statedump_pending = 1; |
560 | lttng_ust_sockinfo_session_enabled(session->priv->owner); | |
710b8ee3 MD |
561 | return 0; |
562 | } | |
53569322 | 563 | |
f69fe5fb | 564 | int lttng_session_enable(struct lttng_ust_session *session) |
8020ceb5 MD |
565 | { |
566 | int ret = 0; | |
e7bc0ef6 | 567 | struct lttng_ust_channel_buffer_private *chan; |
32ce8569 | 568 | int notify_socket; |
8020ceb5 | 569 | |
8020ceb5 MD |
570 | if (session->active) { |
571 | ret = -EBUSY; | |
572 | goto end; | |
573 | } | |
574 | ||
bdb12629 | 575 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
576 | if (notify_socket < 0) |
577 | return notify_socket; | |
578 | ||
ac6b4ac6 | 579 | /* Set transient enabler state to "enabled" */ |
bdb12629 | 580 | session->priv->tstate = 1; |
e58095ef | 581 | |
3ff7660f | 582 | /* We need to sync enablers with session before activation. */ |
d871c65b | 583 | lttng_session_sync_event_enablers(session); |
3ff7660f | 584 | |
8020ceb5 MD |
585 | /* |
586 | * Snapshot the number of events per channel to know the type of header | |
587 | * we need to use. | |
588 | */ | |
bdb12629 | 589 | cds_list_for_each_entry(chan, &session->priv->chan_head, node) { |
a084756d | 590 | struct lttng_ust_ctx *ctx; |
4e48b5d2 | 591 | struct lttng_ust_ctx_field *fields = NULL; |
32ce8569 | 592 | size_t nr_fields = 0; |
6ca18e66 | 593 | uint32_t chan_id; |
32ce8569 MD |
594 | |
595 | /* don't change it if session stop/restart */ | |
8020ceb5 | 596 | if (chan->header_type) |
32ce8569 | 597 | continue; |
0950190a | 598 | ctx = chan->ctx; |
32ce8569 MD |
599 | if (ctx) { |
600 | nr_fields = ctx->nr_fields; | |
83e43212 | 601 | fields = ctx->fields; |
53569322 MD |
602 | ret = lttng_create_all_ctx_enums(nr_fields, fields, |
603 | session); | |
604 | if (ret < 0) { | |
605 | DBG("Error (%d) adding enum to session", ret); | |
606 | return ret; | |
607 | } | |
32ce8569 MD |
608 | } |
609 | ret = ustcomm_register_channel(notify_socket, | |
53569322 | 610 | session, |
bdb12629 | 611 | session->priv->objd, |
e7bc0ef6 | 612 | chan->parent.objd, |
32ce8569 MD |
613 | nr_fields, |
614 | fields, | |
6ca18e66 | 615 | &chan_id, |
32ce8569 | 616 | &chan->header_type); |
b869b5ae MD |
617 | if (ret) { |
618 | DBG("Error (%d) registering channel to sessiond", ret); | |
32ce8569 | 619 | return ret; |
b869b5ae | 620 | } |
6ca18e66 MD |
621 | if (chan_id != chan->id) { |
622 | DBG("Error: channel registration id (%u) does not match id assigned at creation (%u)", | |
623 | chan_id, chan->id); | |
624 | return -EINVAL; | |
625 | } | |
8020ceb5 MD |
626 | } |
627 | ||
ac6b4ac6 | 628 | /* Set atomically the state to "active" */ |
b5234c06 | 629 | CMM_ACCESS_ONCE(session->active) = 1; |
bdb12629 | 630 | CMM_ACCESS_ONCE(session->priv->been_active) = 1; |
95c25348 | 631 | |
710b8ee3 MD |
632 | ret = lttng_session_statedump(session); |
633 | if (ret) | |
634 | return ret; | |
8020ceb5 | 635 | end: |
8020ceb5 MD |
636 | return ret; |
637 | } | |
638 | ||
f69fe5fb | 639 | int lttng_session_disable(struct lttng_ust_session *session) |
8020ceb5 MD |
640 | { |
641 | int ret = 0; | |
642 | ||
8020ceb5 MD |
643 | if (!session->active) { |
644 | ret = -EBUSY; | |
645 | goto end; | |
646 | } | |
ac6b4ac6 | 647 | /* Set atomically the state to "inactive" */ |
b5234c06 | 648 | CMM_ACCESS_ONCE(session->active) = 0; |
ac6b4ac6 MD |
649 | |
650 | /* Set transient enabler state to "disabled" */ | |
bdb12629 | 651 | session->priv->tstate = 0; |
d871c65b | 652 | lttng_session_sync_event_enablers(session); |
8020ceb5 | 653 | end: |
8020ceb5 MD |
654 | return ret; |
655 | } | |
656 | ||
e7bc0ef6 | 657 | int lttng_channel_enable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 658 | { |
ac6b4ac6 | 659 | int ret = 0; |
976fe9ea | 660 | |
e7bc0ef6 | 661 | if (lttng_channel->enabled) { |
ac6b4ac6 MD |
662 | ret = -EBUSY; |
663 | goto end; | |
664 | } | |
665 | /* Set transient enabler state to "enabled" */ | |
e7bc0ef6 MD |
666 | lttng_channel->priv->tstate = 1; |
667 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 | 668 | /* Set atomically the state to "enabled" */ |
e7bc0ef6 | 669 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 1; |
ac6b4ac6 MD |
670 | end: |
671 | return ret; | |
976fe9ea MD |
672 | } |
673 | ||
e7bc0ef6 | 674 | int lttng_channel_disable(struct lttng_ust_channel_common *lttng_channel) |
976fe9ea | 675 | { |
ac6b4ac6 | 676 | int ret = 0; |
976fe9ea | 677 | |
e7bc0ef6 | 678 | if (!lttng_channel->enabled) { |
ac6b4ac6 MD |
679 | ret = -EBUSY; |
680 | goto end; | |
681 | } | |
682 | /* Set atomically the state to "disabled" */ | |
e7bc0ef6 | 683 | CMM_ACCESS_ONCE(lttng_channel->enabled) = 0; |
ac6b4ac6 | 684 | /* Set transient enabler state to "enabled" */ |
e7bc0ef6 MD |
685 | lttng_channel->priv->tstate = 0; |
686 | lttng_session_sync_event_enablers(lttng_channel->session); | |
ac6b4ac6 MD |
687 | end: |
688 | return ret; | |
976fe9ea MD |
689 | } |
690 | ||
fb470188 FD |
691 | static inline |
692 | struct cds_hlist_head *borrow_hash_table_bucket( | |
693 | struct cds_hlist_head *hash_table, | |
694 | unsigned int hash_table_size, | |
4e48b5d2 | 695 | const struct lttng_ust_event_desc *desc) |
fb470188 | 696 | { |
5b4c6da4 | 697 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
fb470188 FD |
698 | size_t name_len; |
699 | uint32_t hash; | |
700 | ||
5b4c6da4 MD |
701 | lttng_ust_format_event_name(desc, name); |
702 | name_len = strlen(name); | |
fb470188 | 703 | |
5b4c6da4 | 704 | hash = jhash(name, name_len, 0); |
fb470188 FD |
705 | return &hash_table[hash & (hash_table_size - 1)]; |
706 | } | |
707 | ||
8020ceb5 MD |
708 | /* |
709 | * Supports event creation while tracing session is active. | |
710 | */ | |
e58095ef | 711 | static |
4e48b5d2 | 712 | int lttng_event_recorder_create(const struct lttng_ust_event_desc *desc, |
e7bc0ef6 | 713 | struct lttng_ust_channel_buffer *chan) |
8020ceb5 | 714 | { |
5b4c6da4 | 715 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
2e70391c MD |
716 | struct lttng_ust_event_recorder *event_recorder; |
717 | struct lttng_ust_event_recorder_private *event_recorder_priv; | |
e7bc0ef6 | 718 | struct lttng_ust_session *session = chan->parent->session; |
d56fa719 | 719 | struct cds_hlist_head *head; |
576599a0 | 720 | int ret = 0; |
32ce8569 MD |
721 | int notify_socket, loglevel; |
722 | const char *uri; | |
8020ceb5 | 723 | |
e7bc0ef6 | 724 | head = borrow_hash_table_bucket(chan->parent->session->priv->events_ht.table, |
fb470188 | 725 | LTTNG_UST_EVENT_HT_SIZE, desc); |
457a6b58 | 726 | |
bdb12629 | 727 | notify_socket = lttng_get_notify_socket(session->priv->owner); |
32ce8569 MD |
728 | if (notify_socket < 0) { |
729 | ret = notify_socket; | |
730 | goto socket_error; | |
731 | } | |
732 | ||
53569322 MD |
733 | ret = lttng_create_all_event_enums(desc->nr_fields, desc->fields, |
734 | session); | |
c785c634 MD |
735 | if (ret < 0) { |
736 | DBG("Error (%d) adding enum to session", ret); | |
737 | goto create_enum_error; | |
738 | } | |
739 | ||
457a6b58 MD |
740 | /* |
741 | * Check if loglevel match. Refuse to connect event if not. | |
742 | */ | |
2e70391c MD |
743 | event_recorder = zmalloc(sizeof(struct lttng_ust_event_recorder)); |
744 | if (!event_recorder) { | |
576599a0 | 745 | ret = -ENOMEM; |
8020ceb5 | 746 | goto cache_error; |
576599a0 | 747 | } |
2e70391c | 748 | event_recorder->struct_size = sizeof(struct lttng_ust_event_recorder); |
80333dfa | 749 | |
7ee76145 | 750 | event_recorder->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
2e70391c | 751 | if (!event_recorder->parent) { |
80333dfa MD |
752 | ret = -ENOMEM; |
753 | goto parent_error; | |
754 | } | |
7ee76145 | 755 | event_recorder->parent->struct_size = sizeof(struct lttng_ust_event_common); |
808edfc8 | 756 | event_recorder->parent->type = LTTNG_UST_EVENT_TYPE_RECORDER; |
ba99fbe2 | 757 | event_recorder->parent->child = event_recorder; |
80333dfa | 758 | |
2e70391c MD |
759 | event_recorder_priv = zmalloc(sizeof(struct lttng_ust_event_recorder_private)); |
760 | if (!event_recorder_priv) { | |
68bb7559 MD |
761 | ret = -ENOMEM; |
762 | goto priv_error; | |
763 | } | |
2e70391c MD |
764 | event_recorder->priv = event_recorder_priv; |
765 | event_recorder_priv->pub = event_recorder; | |
766 | event_recorder->parent->priv = &event_recorder_priv->parent; | |
767 | event_recorder_priv->parent.pub = event_recorder->parent; | |
80333dfa | 768 | |
2e70391c | 769 | event_recorder->chan = chan; |
e58095ef | 770 | |
ac6b4ac6 | 771 | /* Event will be enabled by enabler sync. */ |
a2e4d05e | 772 | event_recorder->parent->run_filter = lttng_ust_interpret_event_filter; |
2e70391c MD |
773 | event_recorder->parent->enabled = 0; |
774 | event_recorder->parent->priv->registered = 0; | |
a2e4d05e | 775 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->filter_bytecode_runtime_head); |
2e70391c MD |
776 | CDS_INIT_LIST_HEAD(&event_recorder->parent->priv->enablers_ref_head); |
777 | event_recorder->parent->priv->desc = desc; | |
32ce8569 MD |
778 | |
779 | if (desc->loglevel) | |
d7b6eb89 | 780 | loglevel = *(*desc->loglevel); |
32ce8569 | 781 | else |
612e9ce4 | 782 | loglevel = LTTNG_UST_TRACEPOINT_LOGLEVEL_DEFAULT; |
dc11f93f MD |
783 | if (desc->model_emf_uri) |
784 | uri = *(desc->model_emf_uri); | |
32ce8569 MD |
785 | else |
786 | uri = NULL; | |
787 | ||
5b4c6da4 MD |
788 | lttng_ust_format_event_name(desc, name); |
789 | ||
13b21cd6 MD |
790 | /* Fetch event ID from sessiond */ |
791 | ret = ustcomm_register_event(notify_socket, | |
c785c634 | 792 | session, |
bdb12629 | 793 | session->priv->objd, |
e7bc0ef6 | 794 | chan->priv->parent.objd, |
5b4c6da4 | 795 | name, |
13b21cd6 MD |
796 | loglevel, |
797 | desc->signature, | |
798 | desc->nr_fields, | |
799 | desc->fields, | |
800 | uri, | |
8936b6c0 | 801 | &event_recorder->priv->id); |
13b21cd6 MD |
802 | if (ret < 0) { |
803 | DBG("Error (%d) registering event to sessiond", ret); | |
804 | goto sessiond_register_error; | |
32ce8569 | 805 | } |
2b213b16 | 806 | |
e7bc0ef6 | 807 | cds_list_add(&event_recorder_priv->node, &chan->parent->session->priv->events_head); |
ba99fbe2 | 808 | cds_hlist_add_head(&event_recorder_priv->hlist, head); |
576599a0 | 809 | return 0; |
8020ceb5 | 810 | |
32ce8569 | 811 | sessiond_register_error: |
2e70391c | 812 | free(event_recorder_priv); |
68bb7559 | 813 | priv_error: |
2e70391c | 814 | free(event_recorder->parent); |
80333dfa | 815 | parent_error: |
2e70391c | 816 | free(event_recorder); |
8020ceb5 | 817 | cache_error: |
c785c634 | 818 | create_enum_error: |
32ce8569 | 819 | socket_error: |
576599a0 | 820 | return ret; |
8020ceb5 MD |
821 | } |
822 | ||
d8d2416d | 823 | static |
4e48b5d2 | 824 | int lttng_event_notifier_create(const struct lttng_ust_event_desc *desc, |
6566528b | 825 | uint64_t token, uint64_t error_counter_index, |
d8d2416d FD |
826 | struct lttng_event_notifier_group *event_notifier_group) |
827 | { | |
d7d45c0d | 828 | struct lttng_ust_event_notifier *event_notifier; |
115db533 | 829 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
830 | struct cds_hlist_head *head; |
831 | int ret = 0; | |
832 | ||
833 | /* | |
834 | * Get the hashtable bucket the created lttng_event_notifier object | |
835 | * should be inserted. | |
836 | */ | |
837 | head = borrow_hash_table_bucket( | |
838 | event_notifier_group->event_notifiers_ht.table, | |
839 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
840 | ||
d7d45c0d | 841 | event_notifier = zmalloc(sizeof(struct lttng_ust_event_notifier)); |
d8d2416d FD |
842 | if (!event_notifier) { |
843 | ret = -ENOMEM; | |
844 | goto error; | |
845 | } | |
d7d45c0d | 846 | event_notifier->struct_size = sizeof(struct lttng_ust_event_notifier); |
d8d2416d | 847 | |
115db533 MD |
848 | event_notifier->parent = zmalloc(sizeof(struct lttng_ust_event_common)); |
849 | if (!event_notifier->parent) { | |
850 | ret = -ENOMEM; | |
851 | goto parent_error; | |
852 | } | |
853 | event_notifier->parent->struct_size = sizeof(struct lttng_ust_event_common); | |
808edfc8 | 854 | event_notifier->parent->type = LTTNG_UST_EVENT_TYPE_NOTIFIER; |
ba99fbe2 | 855 | event_notifier->parent->child = event_notifier; |
115db533 MD |
856 | |
857 | event_notifier_priv = zmalloc(sizeof(struct lttng_ust_event_notifier_private)); | |
858 | if (!event_notifier_priv) { | |
859 | ret = -ENOMEM; | |
860 | goto priv_error; | |
861 | } | |
862 | event_notifier->priv = event_notifier_priv; | |
863 | event_notifier_priv->pub = event_notifier; | |
864 | event_notifier->parent->priv = &event_notifier_priv->parent; | |
865 | event_notifier_priv->parent.pub = event_notifier->parent; | |
866 | ||
867 | event_notifier_priv->group = event_notifier_group; | |
868 | event_notifier_priv->parent.user_token = token; | |
869 | event_notifier_priv->error_counter_index = error_counter_index; | |
d8d2416d FD |
870 | |
871 | /* Event notifier will be enabled by enabler sync. */ | |
a2e4d05e | 872 | event_notifier->parent->run_filter = lttng_ust_interpret_event_filter; |
115db533 MD |
873 | event_notifier->parent->enabled = 0; |
874 | event_notifier_priv->parent.registered = 0; | |
d8d2416d | 875 | |
a2e4d05e MD |
876 | CDS_INIT_LIST_HEAD(&event_notifier->parent->priv->filter_bytecode_runtime_head); |
877 | CDS_INIT_LIST_HEAD(&event_notifier->priv->capture_bytecode_runtime_head); | |
115db533 MD |
878 | CDS_INIT_LIST_HEAD(&event_notifier_priv->parent.enablers_ref_head); |
879 | event_notifier_priv->parent.desc = desc; | |
cab88ff8 | 880 | event_notifier->notification_send = lttng_event_notifier_notification_send; |
d8d2416d | 881 | |
115db533 | 882 | cds_list_add(&event_notifier_priv->node, |
d8d2416d | 883 | &event_notifier_group->event_notifiers_head); |
115db533 | 884 | cds_hlist_add_head(&event_notifier_priv->hlist, head); |
d8d2416d FD |
885 | |
886 | return 0; | |
887 | ||
115db533 MD |
888 | priv_error: |
889 | free(event_notifier->parent); | |
890 | parent_error: | |
891 | free(event_notifier); | |
d8d2416d FD |
892 | error: |
893 | return ret; | |
894 | } | |
895 | ||
e58095ef | 896 | static |
4e48b5d2 | 897 | int lttng_desc_match_star_glob_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
898 | struct lttng_enabler *enabler) |
899 | { | |
5b4c6da4 | 900 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef | 901 | int loglevel = 0; |
7e2e405c | 902 | unsigned int has_loglevel = 0; |
e58095ef | 903 | |
5b4c6da4 | 904 | lttng_ust_format_event_name(desc, name); |
e450e339 | 905 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_STAR_GLOB); |
1f6f42e6 | 906 | if (!strutils_star_glob_match(enabler->event_param.name, SIZE_MAX, |
5b4c6da4 | 907 | name, SIZE_MAX)) |
e58095ef MD |
908 | return 0; |
909 | if (desc->loglevel) { | |
910 | loglevel = *(*desc->loglevel); | |
911 | has_loglevel = 1; | |
912 | } | |
913 | if (!lttng_loglevel_match(loglevel, | |
914 | has_loglevel, | |
915 | enabler->event_param.loglevel_type, | |
916 | enabler->event_param.loglevel)) | |
917 | return 0; | |
918 | return 1; | |
919 | } | |
920 | ||
921 | static | |
4e48b5d2 | 922 | int lttng_desc_match_event_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
923 | struct lttng_enabler *enabler) |
924 | { | |
5b4c6da4 | 925 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; |
e58095ef MD |
926 | int loglevel = 0; |
927 | unsigned int has_loglevel = 0; | |
928 | ||
5b4c6da4 | 929 | lttng_ust_format_event_name(desc, name); |
e450e339 | 930 | assert(enabler->format_type == LTTNG_ENABLER_FORMAT_EVENT); |
5b4c6da4 | 931 | if (strcmp(name, enabler->event_param.name)) |
e58095ef MD |
932 | return 0; |
933 | if (desc->loglevel) { | |
934 | loglevel = *(*desc->loglevel); | |
935 | has_loglevel = 1; | |
936 | } | |
937 | if (!lttng_loglevel_match(loglevel, | |
938 | has_loglevel, | |
939 | enabler->event_param.loglevel_type, | |
940 | enabler->event_param.loglevel)) | |
941 | return 0; | |
942 | return 1; | |
943 | } | |
944 | ||
945 | static | |
4e48b5d2 | 946 | int lttng_desc_match_enabler(const struct lttng_ust_event_desc *desc, |
e58095ef MD |
947 | struct lttng_enabler *enabler) |
948 | { | |
e450e339 FD |
949 | switch (enabler->format_type) { |
950 | case LTTNG_ENABLER_FORMAT_STAR_GLOB: | |
196ec2df PP |
951 | { |
952 | struct lttng_ust_excluder_node *excluder; | |
953 | ||
954 | if (!lttng_desc_match_star_glob_enabler(desc, enabler)) { | |
955 | return 0; | |
956 | } | |
957 | ||
958 | /* | |
959 | * If the matching event matches with an excluder, | |
960 | * return 'does not match' | |
961 | */ | |
962 | cds_list_for_each_entry(excluder, &enabler->excluder_head, node) { | |
963 | int count; | |
964 | ||
965 | for (count = 0; count < excluder->excluder.count; count++) { | |
966 | int len; | |
967 | char *excluder_name; | |
968 | ||
969 | excluder_name = (char *) (excluder->excluder.names) | |
fd17d7ce MD |
970 | + count * LTTNG_UST_ABI_SYM_NAME_LEN; |
971 | len = strnlen(excluder_name, LTTNG_UST_ABI_SYM_NAME_LEN); | |
5b4c6da4 MD |
972 | if (len > 0) { |
973 | char name[LTTNG_UST_ABI_SYM_NAME_LEN]; | |
974 | ||
975 | lttng_ust_format_event_name(desc, name); | |
976 | if (strutils_star_glob_match(excluder_name, len, name, SIZE_MAX)) { | |
977 | return 0; | |
978 | } | |
979 | } | |
ed5b5bbd JI |
980 | } |
981 | } | |
196ec2df | 982 | return 1; |
ed5b5bbd | 983 | } |
e450e339 | 984 | case LTTNG_ENABLER_FORMAT_EVENT: |
e58095ef MD |
985 | return lttng_desc_match_event_enabler(desc, enabler); |
986 | default: | |
987 | return -EINVAL; | |
988 | } | |
989 | } | |
990 | ||
991 | static | |
d871c65b | 992 | int lttng_event_enabler_match_event(struct lttng_event_enabler *event_enabler, |
2e70391c | 993 | struct lttng_ust_event_recorder *event_recorder) |
e58095ef | 994 | { |
2e70391c | 995 | if (lttng_desc_match_enabler(event_recorder->parent->priv->desc, |
d871c65b | 996 | lttng_event_enabler_as_enabler(event_enabler)) |
2e70391c | 997 | && event_recorder->chan == event_enabler->chan) |
d970f72e MD |
998 | return 1; |
999 | else | |
1000 | return 0; | |
e58095ef MD |
1001 | } |
1002 | ||
d8d2416d FD |
1003 | static |
1004 | int lttng_event_notifier_enabler_match_event_notifier( | |
1005 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
d7d45c0d | 1006 | struct lttng_ust_event_notifier *event_notifier) |
d8d2416d | 1007 | { |
115db533 | 1008 | int desc_matches = lttng_desc_match_enabler(event_notifier->priv->parent.desc, |
d8d2416d FD |
1009 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1010 | ||
115db533 MD |
1011 | if (desc_matches && event_notifier->priv->group == event_notifier_enabler->group && |
1012 | event_notifier->priv->parent.user_token == event_notifier_enabler->user_token) | |
d8d2416d FD |
1013 | return 1; |
1014 | else | |
1015 | return 0; | |
1016 | } | |
1017 | ||
e58095ef | 1018 | static |
d871c65b FD |
1019 | struct lttng_enabler_ref *lttng_enabler_ref( |
1020 | struct cds_list_head *enabler_ref_list, | |
e58095ef MD |
1021 | struct lttng_enabler *enabler) |
1022 | { | |
1023 | struct lttng_enabler_ref *enabler_ref; | |
1024 | ||
d871c65b | 1025 | cds_list_for_each_entry(enabler_ref, enabler_ref_list, node) { |
e58095ef MD |
1026 | if (enabler_ref->ref == enabler) |
1027 | return enabler_ref; | |
1028 | } | |
1029 | return NULL; | |
1030 | } | |
1031 | ||
8020ceb5 | 1032 | /* |
e58095ef MD |
1033 | * Create struct lttng_event if it is missing and present in the list of |
1034 | * tracepoint probes. | |
8020ceb5 | 1035 | */ |
e58095ef | 1036 | static |
ba99fbe2 | 1037 | void lttng_create_event_recorder_if_missing(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1038 | { |
e7bc0ef6 | 1039 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
4e48b5d2 MD |
1040 | struct lttng_ust_registered_probe *reg_probe; |
1041 | const struct lttng_ust_event_desc *desc; | |
2e70391c | 1042 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef MD |
1043 | int i; |
1044 | struct cds_list_head *probe_list; | |
1045 | ||
1046 | probe_list = lttng_get_probe_list_head(); | |
1047 | /* | |
1048 | * For each probe event, if we find that a probe event matches | |
1049 | * our enabler, create an associated lttng_event if not | |
1050 | * already present. | |
1051 | */ | |
4e48b5d2 MD |
1052 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1053 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1054 | ||
e58095ef | 1055 | for (i = 0; i < probe_desc->nr_events; i++) { |
98a97f24 FD |
1056 | int ret; |
1057 | bool found = false; | |
d56fa719 MD |
1058 | struct cds_hlist_head *head; |
1059 | struct cds_hlist_node *node; | |
e58095ef MD |
1060 | |
1061 | desc = probe_desc->event_desc[i]; | |
d871c65b FD |
1062 | if (!lttng_desc_match_enabler(desc, |
1063 | lttng_event_enabler_as_enabler(event_enabler))) | |
e58095ef MD |
1064 | continue; |
1065 | ||
fb470188 | 1066 | head = borrow_hash_table_bucket( |
bdb12629 | 1067 | session->priv->events_ht.table, |
fb470188 FD |
1068 | LTTNG_UST_EVENT_HT_SIZE, desc); |
1069 | ||
2e70391c MD |
1070 | cds_hlist_for_each_entry(event_recorder_priv, node, head, hlist) { |
1071 | if (event_recorder_priv->parent.desc == desc | |
1072 | && event_recorder_priv->pub->chan == event_enabler->chan) { | |
98a97f24 | 1073 | found = true; |
3140bffe FD |
1074 | break; |
1075 | } | |
e58095ef MD |
1076 | } |
1077 | if (found) | |
1078 | continue; | |
1079 | ||
1080 | /* | |
1081 | * We need to create an event for this | |
1082 | * event probe. | |
1083 | */ | |
2e70391c | 1084 | ret = lttng_event_recorder_create(probe_desc->event_desc[i], |
d871c65b | 1085 | event_enabler->chan); |
e58095ef | 1086 | if (ret) { |
5b4c6da4 MD |
1087 | DBG("Unable to create event \"%s:%s\", error %d\n", |
1088 | probe_desc->provider_name, | |
1089 | probe_desc->event_desc[i]->event_name, ret); | |
e58095ef | 1090 | } |
8165c8da | 1091 | } |
8020ceb5 | 1092 | } |
8020ceb5 MD |
1093 | } |
1094 | ||
a44d07da | 1095 | static |
4e48b5d2 | 1096 | void probe_provider_event_for_each(const struct lttng_ust_probe_desc *provider_desc, |
ba99fbe2 | 1097 | void (*event_func)(struct lttng_ust_event_common *event)) |
35ac38cb FD |
1098 | { |
1099 | struct cds_hlist_node *node, *tmp_node; | |
1100 | struct cds_list_head *sessionsp; | |
a44d07da | 1101 | unsigned int i; |
35ac38cb FD |
1102 | |
1103 | /* Get handle on list of sessions. */ | |
7753d283 | 1104 | sessionsp = lttng_get_sessions(); |
35ac38cb FD |
1105 | |
1106 | /* | |
a44d07da FD |
1107 | * Iterate over all events in the probe provider descriptions and |
1108 | * sessions to queue the unregistration of the events. | |
35ac38cb FD |
1109 | */ |
1110 | for (i = 0; i < provider_desc->nr_events; i++) { | |
4e48b5d2 | 1111 | const struct lttng_ust_event_desc *event_desc; |
d8d2416d | 1112 | struct lttng_event_notifier_group *event_notifier_group; |
ba99fbe2 | 1113 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
115db533 | 1114 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
bdb12629 | 1115 | struct lttng_ust_session_private *session_priv; |
a44d07da | 1116 | struct cds_hlist_head *head; |
35ac38cb FD |
1117 | |
1118 | event_desc = provider_desc->event_desc[i]; | |
35ac38cb | 1119 | |
a44d07da FD |
1120 | /* |
1121 | * Iterate over all session to find the current event | |
1122 | * description. | |
1123 | */ | |
bdb12629 | 1124 | cds_list_for_each_entry(session_priv, sessionsp, node) { |
35ac38cb | 1125 | /* |
a44d07da FD |
1126 | * Get the list of events in the hashtable bucket and |
1127 | * iterate to find the event matching this descriptor. | |
35ac38cb | 1128 | */ |
fb470188 | 1129 | head = borrow_hash_table_bucket( |
bdb12629 | 1130 | session_priv->events_ht.table, |
fb470188 FD |
1131 | LTTNG_UST_EVENT_HT_SIZE, event_desc); |
1132 | ||
2e70391c MD |
1133 | cds_hlist_for_each_entry_safe(event_recorder_priv, node, tmp_node, head, hlist) { |
1134 | if (event_desc == event_recorder_priv->parent.desc) { | |
ba99fbe2 | 1135 | event_func(event_recorder_priv->parent.pub); |
35ac38cb FD |
1136 | break; |
1137 | } | |
1138 | } | |
1139 | } | |
d8d2416d FD |
1140 | |
1141 | /* | |
1142 | * Iterate over all event_notifier groups to find the current event | |
1143 | * description. | |
1144 | */ | |
1145 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1146 | /* | |
1147 | * Get the list of event_notifiers in the hashtable bucket and | |
1148 | * iterate to find the event_notifier matching this | |
1149 | * descriptor. | |
1150 | */ | |
1151 | head = borrow_hash_table_bucket( | |
1152 | event_notifier_group->event_notifiers_ht.table, | |
1153 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, event_desc); | |
1154 | ||
115db533 MD |
1155 | cds_hlist_for_each_entry_safe(event_notifier_priv, node, tmp_node, head, hlist) { |
1156 | if (event_desc == event_notifier_priv->parent.desc) { | |
ba99fbe2 | 1157 | event_func(event_notifier_priv->parent.pub); |
d8d2416d FD |
1158 | break; |
1159 | } | |
1160 | } | |
1161 | } | |
35ac38cb | 1162 | } |
a44d07da FD |
1163 | } |
1164 | ||
1165 | static | |
ba99fbe2 | 1166 | void _event_enum_destroy(struct lttng_ust_event_common *event) |
a44d07da | 1167 | { |
a44d07da | 1168 | |
ba99fbe2 MD |
1169 | switch (event->type) { |
1170 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1171 | { | |
1172 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
e7bc0ef6 | 1173 | struct lttng_ust_session *session = event_recorder->chan->parent->session; |
ba99fbe2 MD |
1174 | unsigned int i; |
1175 | ||
1176 | /* Destroy enums of the current event. */ | |
1177 | for (i = 0; i < event_recorder->parent->priv->desc->nr_fields; i++) { | |
4e48b5d2 MD |
1178 | const struct lttng_ust_enum_desc *enum_desc; |
1179 | const struct lttng_ust_event_field *field; | |
ba99fbe2 MD |
1180 | struct lttng_enum *curr_enum; |
1181 | ||
25cff019 | 1182 | field = event_recorder->parent->priv->desc->fields[i]; |
a084756d MD |
1183 | switch (field->type->type) { |
1184 | case lttng_ust_type_enum: | |
1185 | enum_desc = lttng_ust_get_type_enum(field->type)->desc; | |
ba99fbe2 MD |
1186 | break; |
1187 | default: | |
1188 | continue; | |
1189 | } | |
a44d07da | 1190 | |
ba99fbe2 MD |
1191 | curr_enum = lttng_ust_enum_get_from_desc(session, enum_desc); |
1192 | if (curr_enum) { | |
1193 | _lttng_enum_destroy(curr_enum); | |
1194 | } | |
a44d07da | 1195 | } |
ba99fbe2 MD |
1196 | break; |
1197 | } | |
1198 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1199 | break; | |
1200 | default: | |
1201 | abort(); | |
a44d07da | 1202 | } |
a44d07da | 1203 | /* Destroy event. */ |
ba99fbe2 | 1204 | _lttng_event_destroy(event); |
a44d07da FD |
1205 | } |
1206 | ||
1207 | /* | |
1208 | * Iterate over all the UST sessions to unregister and destroy all probes from | |
1209 | * the probe provider descriptor received as argument. Must me called with the | |
1210 | * ust_lock held. | |
1211 | */ | |
1212 | void lttng_probe_provider_unregister_events( | |
4e48b5d2 | 1213 | const struct lttng_ust_probe_desc *provider_desc) |
a44d07da FD |
1214 | { |
1215 | /* | |
1216 | * Iterate over all events in the probe provider descriptions and sessions | |
1217 | * to queue the unregistration of the events. | |
1218 | */ | |
ba99fbe2 | 1219 | probe_provider_event_for_each(provider_desc, _lttng_event_unregister); |
35ac38cb FD |
1220 | |
1221 | /* Wait for grace period. */ | |
b653ddc1 | 1222 | lttng_ust_urcu_synchronize_rcu(); |
35ac38cb | 1223 | /* Prune the unregistration queue. */ |
d10a2205 | 1224 | lttng_ust_tp_probe_prune_release_queue(); |
35ac38cb FD |
1225 | |
1226 | /* | |
1227 | * It is now safe to destroy the events and remove them from the event list | |
1228 | * and hashtables. | |
1229 | */ | |
ba99fbe2 | 1230 | probe_provider_event_for_each(provider_desc, _event_enum_destroy); |
35ac38cb FD |
1231 | } |
1232 | ||
8020ceb5 | 1233 | /* |
d8d2416d | 1234 | * Create events associated with an event enabler (if not already present), |
e58095ef | 1235 | * and add backward reference from the event to the enabler. |
8020ceb5 MD |
1236 | */ |
1237 | static | |
ba99fbe2 | 1238 | int lttng_event_enabler_ref_event_recorders(struct lttng_event_enabler *event_enabler) |
8020ceb5 | 1239 | { |
e7bc0ef6 | 1240 | struct lttng_ust_session *session = event_enabler->chan->parent->session; |
2e70391c | 1241 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
e58095ef | 1242 | |
d871c65b | 1243 | if (!lttng_event_enabler_as_enabler(event_enabler)->enabled) |
de713d8a FD |
1244 | goto end; |
1245 | ||
e58095ef | 1246 | /* First ensure that probe events are created for this enabler. */ |
ba99fbe2 | 1247 | lttng_create_event_recorder_if_missing(event_enabler); |
e58095ef MD |
1248 | |
1249 | /* For each event matching enabler in session event list. */ | |
2e70391c | 1250 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef MD |
1251 | struct lttng_enabler_ref *enabler_ref; |
1252 | ||
2e70391c | 1253 | if (!lttng_event_enabler_match_event(event_enabler, event_recorder_priv->pub)) |
e58095ef MD |
1254 | continue; |
1255 | ||
2e70391c | 1256 | enabler_ref = lttng_enabler_ref(&event_recorder_priv->parent.enablers_ref_head, |
d871c65b | 1257 | lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef MD |
1258 | if (!enabler_ref) { |
1259 | /* | |
1260 | * If no backward ref, create it. | |
1261 | * Add backward ref from event to enabler. | |
1262 | */ | |
1263 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1264 | if (!enabler_ref) | |
1265 | return -ENOMEM; | |
d871c65b FD |
1266 | enabler_ref->ref = lttng_event_enabler_as_enabler( |
1267 | event_enabler); | |
e58095ef | 1268 | cds_list_add(&enabler_ref->node, |
2e70391c | 1269 | &event_recorder_priv->parent.enablers_ref_head); |
8165c8da | 1270 | } |
e58095ef MD |
1271 | |
1272 | /* | |
1273 | * Link filter bytecodes if not linked yet. | |
1274 | */ | |
2e70391c | 1275 | lttng_enabler_link_bytecode(event_recorder_priv->parent.desc, |
bdb12629 | 1276 | &session->priv->ctx, |
a2e4d05e | 1277 | &event_recorder_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1278 | <tng_event_enabler_as_enabler(event_enabler)->filter_bytecode_head); |
e58095ef MD |
1279 | |
1280 | /* TODO: merge event context. */ | |
1281 | } | |
de713d8a | 1282 | end: |
e58095ef MD |
1283 | return 0; |
1284 | } | |
1285 | ||
1286 | /* | |
1287 | * Called at library load: connect the probe on all enablers matching | |
1288 | * this event. | |
5f733922 | 1289 | * Called with session mutex held. |
e58095ef | 1290 | */ |
5f733922 | 1291 | int lttng_fix_pending_events(void) |
e58095ef | 1292 | { |
bdb12629 | 1293 | struct lttng_ust_session_private *session_priv; |
e58095ef | 1294 | |
bdb12629 MD |
1295 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1296 | lttng_session_lazy_sync_event_enablers(session_priv->pub); | |
8020ceb5 | 1297 | } |
e58095ef MD |
1298 | return 0; |
1299 | } | |
1300 | ||
d8d2416d FD |
1301 | int lttng_fix_pending_event_notifiers(void) |
1302 | { | |
1303 | struct lttng_event_notifier_group *event_notifier_group; | |
1304 | ||
1305 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
1306 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1307 | } | |
1308 | return 0; | |
1309 | } | |
1310 | ||
246be17e | 1311 | /* |
37dddb65 MD |
1312 | * For each session of the owner thread, execute pending statedump. |
1313 | * Only dump state for the sessions owned by the caller thread, because | |
1314 | * we don't keep ust_lock across the entire iteration. | |
246be17e | 1315 | */ |
3327ac33 | 1316 | void lttng_handle_pending_statedump(void *owner) |
246be17e | 1317 | { |
bdb12629 | 1318 | struct lttng_ust_session_private *session_priv; |
246be17e | 1319 | |
37dddb65 | 1320 | /* Execute state dump */ |
cf73e0fe | 1321 | do_lttng_ust_statedump(owner); |
37dddb65 MD |
1322 | |
1323 | /* Clear pending state dump */ | |
3327ac33 MD |
1324 | if (ust_lock()) { |
1325 | goto end; | |
1326 | } | |
bdb12629 MD |
1327 | cds_list_for_each_entry(session_priv, &sessions, node) { |
1328 | if (session_priv->owner != owner) | |
37dddb65 | 1329 | continue; |
bdb12629 | 1330 | if (!session_priv->statedump_pending) |
37dddb65 | 1331 | continue; |
bdb12629 | 1332 | session_priv->statedump_pending = 0; |
246be17e | 1333 | } |
3327ac33 | 1334 | end: |
37dddb65 | 1335 | ust_unlock(); |
3327ac33 | 1336 | return; |
246be17e PW |
1337 | } |
1338 | ||
e58095ef | 1339 | static |
ba99fbe2 | 1340 | void _lttng_event_destroy(struct lttng_ust_event_common *event) |
e58095ef MD |
1341 | { |
1342 | struct lttng_enabler_ref *enabler_ref, *tmp_enabler_ref; | |
1343 | ||
ba99fbe2 | 1344 | lttng_free_event_filter_runtime(event); |
e58095ef MD |
1345 | /* Free event enabler refs */ |
1346 | cds_list_for_each_entry_safe(enabler_ref, tmp_enabler_ref, | |
ba99fbe2 | 1347 | &event->priv->enablers_ref_head, node) |
e58095ef | 1348 | free(enabler_ref); |
ba99fbe2 MD |
1349 | |
1350 | switch (event->type) { | |
1351 | case LTTNG_UST_EVENT_TYPE_RECORDER: | |
1352 | { | |
1353 | struct lttng_ust_event_recorder *event_recorder = event->child; | |
1354 | ||
1355 | /* Remove from event list. */ | |
1356 | cds_list_del(&event_recorder->priv->node); | |
1357 | /* Remove from event hash table. */ | |
1358 | cds_hlist_del(&event_recorder->priv->hlist); | |
1359 | ||
a40b5b8c | 1360 | lttng_destroy_context(event_recorder->priv->ctx); |
ba99fbe2 MD |
1361 | free(event_recorder->parent); |
1362 | free(event_recorder->priv); | |
1363 | free(event_recorder); | |
1364 | break; | |
1365 | } | |
1366 | case LTTNG_UST_EVENT_TYPE_NOTIFIER: | |
1367 | { | |
1368 | struct lttng_ust_event_notifier *event_notifier = event->child; | |
1369 | ||
1370 | /* Remove from event list. */ | |
1371 | cds_list_del(&event_notifier->priv->node); | |
1372 | /* Remove from event hash table. */ | |
1373 | cds_hlist_del(&event_notifier->priv->hlist); | |
1374 | ||
1375 | free(event_notifier->priv); | |
1376 | free(event_notifier->parent); | |
1377 | free(event_notifier); | |
1378 | break; | |
1379 | } | |
1380 | default: | |
1381 | abort(); | |
1382 | } | |
8020ceb5 MD |
1383 | } |
1384 | ||
c785c634 MD |
1385 | static |
1386 | void _lttng_enum_destroy(struct lttng_enum *_enum) | |
1387 | { | |
1388 | cds_list_del(&_enum->node); | |
35ac38cb | 1389 | cds_hlist_del(&_enum->hlist); |
c785c634 MD |
1390 | free(_enum); |
1391 | } | |
1392 | ||
fd17d7ce | 1393 | void lttng_ust_abi_events_exit(void) |
8020ceb5 | 1394 | { |
bdb12629 | 1395 | struct lttng_ust_session_private *session_priv, *tmpsession_priv; |
8020ceb5 | 1396 | |
bdb12629 MD |
1397 | cds_list_for_each_entry_safe(session_priv, tmpsession_priv, &sessions, node) |
1398 | lttng_session_destroy(session_priv->pub); | |
8020ceb5 | 1399 | } |
457a6b58 | 1400 | |
e58095ef MD |
1401 | /* |
1402 | * Enabler management. | |
1403 | */ | |
d871c65b FD |
1404 | struct lttng_event_enabler *lttng_event_enabler_create( |
1405 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1406 | struct lttng_ust_abi_event *event_param, |
e7bc0ef6 | 1407 | struct lttng_ust_channel_buffer *chan) |
457a6b58 | 1408 | { |
d871c65b | 1409 | struct lttng_event_enabler *event_enabler; |
e58095ef | 1410 | |
d871c65b FD |
1411 | event_enabler = zmalloc(sizeof(*event_enabler)); |
1412 | if (!event_enabler) | |
e58095ef | 1413 | return NULL; |
d871c65b FD |
1414 | event_enabler->base.format_type = format_type; |
1415 | CDS_INIT_LIST_HEAD(&event_enabler->base.filter_bytecode_head); | |
1416 | CDS_INIT_LIST_HEAD(&event_enabler->base.excluder_head); | |
1417 | memcpy(&event_enabler->base.event_param, event_param, | |
1418 | sizeof(event_enabler->base.event_param)); | |
1419 | event_enabler->chan = chan; | |
e58095ef | 1420 | /* ctx left NULL */ |
d871c65b | 1421 | event_enabler->base.enabled = 0; |
e7bc0ef6 MD |
1422 | cds_list_add(&event_enabler->node, &event_enabler->chan->parent->session->priv->enablers_head); |
1423 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); | |
d871c65b FD |
1424 | |
1425 | return event_enabler; | |
457a6b58 MD |
1426 | } |
1427 | ||
d8d2416d FD |
1428 | struct lttng_event_notifier_enabler *lttng_event_notifier_enabler_create( |
1429 | struct lttng_event_notifier_group *event_notifier_group, | |
1430 | enum lttng_enabler_format_type format_type, | |
fd17d7ce | 1431 | struct lttng_ust_abi_event_notifier *event_notifier_param) |
d8d2416d FD |
1432 | { |
1433 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
1434 | ||
1435 | event_notifier_enabler = zmalloc(sizeof(*event_notifier_enabler)); | |
1436 | if (!event_notifier_enabler) | |
1437 | return NULL; | |
1438 | event_notifier_enabler->base.format_type = format_type; | |
1439 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.filter_bytecode_head); | |
d37ecb3f | 1440 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->capture_bytecode_head); |
d8d2416d FD |
1441 | CDS_INIT_LIST_HEAD(&event_notifier_enabler->base.excluder_head); |
1442 | ||
1443 | event_notifier_enabler->user_token = event_notifier_param->event.token; | |
9560f5eb | 1444 | event_notifier_enabler->error_counter_index = event_notifier_param->error_counter_index; |
d37ecb3f | 1445 | event_notifier_enabler->num_captures = 0; |
d8d2416d FD |
1446 | |
1447 | memcpy(&event_notifier_enabler->base.event_param.name, | |
1448 | event_notifier_param->event.name, | |
1449 | sizeof(event_notifier_enabler->base.event_param.name)); | |
1450 | event_notifier_enabler->base.event_param.instrumentation = | |
1451 | event_notifier_param->event.instrumentation; | |
1452 | event_notifier_enabler->base.event_param.loglevel = | |
1453 | event_notifier_param->event.loglevel; | |
1454 | event_notifier_enabler->base.event_param.loglevel_type = | |
1455 | event_notifier_param->event.loglevel_type; | |
1456 | ||
1457 | event_notifier_enabler->base.enabled = 0; | |
1458 | event_notifier_enabler->group = event_notifier_group; | |
1459 | ||
1460 | cds_list_add(&event_notifier_enabler->node, | |
1461 | &event_notifier_group->enablers_head); | |
1462 | ||
1463 | lttng_event_notifier_group_sync_enablers(event_notifier_group); | |
1464 | ||
1465 | return event_notifier_enabler; | |
1466 | } | |
1467 | ||
d871c65b | 1468 | int lttng_event_enabler_enable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1469 | { |
d871c65b | 1470 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 1; |
e7bc0ef6 | 1471 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1472 | |
e58095ef | 1473 | return 0; |
457a6b58 | 1474 | } |
457a6b58 | 1475 | |
d871c65b | 1476 | int lttng_event_enabler_disable(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1477 | { |
d871c65b | 1478 | lttng_event_enabler_as_enabler(event_enabler)->enabled = 0; |
e7bc0ef6 | 1479 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
d871c65b | 1480 | |
e58095ef MD |
1481 | return 0; |
1482 | } | |
457a6b58 | 1483 | |
d871c65b | 1484 | static |
a56fd376 | 1485 | void _lttng_enabler_attach_filter_bytecode(struct lttng_enabler *enabler, |
ab89263e | 1486 | struct lttng_ust_bytecode_node **bytecode) |
e58095ef | 1487 | { |
ab89263e MD |
1488 | (*bytecode)->enabler = enabler; |
1489 | cds_list_add_tail(&(*bytecode)->node, &enabler->filter_bytecode_head); | |
1490 | /* Take ownership of bytecode */ | |
1491 | *bytecode = NULL; | |
d871c65b FD |
1492 | } |
1493 | ||
a56fd376 | 1494 | int lttng_event_enabler_attach_filter_bytecode(struct lttng_event_enabler *event_enabler, |
ab89263e | 1495 | struct lttng_ust_bytecode_node **bytecode) |
d871c65b | 1496 | { |
a56fd376 | 1497 | _lttng_enabler_attach_filter_bytecode( |
d871c65b FD |
1498 | lttng_event_enabler_as_enabler(event_enabler), bytecode); |
1499 | ||
e7bc0ef6 | 1500 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
e58095ef | 1501 | return 0; |
0bfb5cbd JI |
1502 | } |
1503 | ||
d871c65b FD |
1504 | static |
1505 | void _lttng_enabler_attach_exclusion(struct lttng_enabler *enabler, | |
e9fe6aad | 1506 | struct lttng_ust_excluder_node **excluder) |
0bfb5cbd | 1507 | { |
e9fe6aad MD |
1508 | (*excluder)->enabler = enabler; |
1509 | cds_list_add_tail(&(*excluder)->node, &enabler->excluder_head); | |
1510 | /* Take ownership of excluder */ | |
1511 | *excluder = NULL; | |
d871c65b FD |
1512 | } |
1513 | ||
1514 | int lttng_event_enabler_attach_exclusion(struct lttng_event_enabler *event_enabler, | |
e9fe6aad | 1515 | struct lttng_ust_excluder_node **excluder) |
d871c65b FD |
1516 | { |
1517 | _lttng_enabler_attach_exclusion( | |
1518 | lttng_event_enabler_as_enabler(event_enabler), excluder); | |
1519 | ||
e7bc0ef6 | 1520 | lttng_session_lazy_sync_event_enablers(event_enabler->chan->parent->session); |
0bfb5cbd | 1521 | return 0; |
e58095ef | 1522 | } |
f488575f | 1523 | |
d8d2416d FD |
1524 | int lttng_event_notifier_enabler_enable( |
1525 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1526 | { | |
1527 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 1; | |
1528 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1529 | ||
1530 | return 0; | |
1531 | } | |
1532 | ||
1533 | int lttng_event_notifier_enabler_disable( | |
1534 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1535 | { | |
1536 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled = 0; | |
1537 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1538 | ||
1539 | return 0; | |
1540 | } | |
1541 | ||
a56fd376 | 1542 | int lttng_event_notifier_enabler_attach_filter_bytecode( |
d8d2416d | 1543 | struct lttng_event_notifier_enabler *event_notifier_enabler, |
ab89263e | 1544 | struct lttng_ust_bytecode_node **bytecode) |
d8d2416d | 1545 | { |
a56fd376 | 1546 | _lttng_enabler_attach_filter_bytecode( |
d8d2416d FD |
1547 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), |
1548 | bytecode); | |
1549 | ||
1550 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1551 | return 0; | |
1552 | } | |
1553 | ||
d37ecb3f FD |
1554 | int lttng_event_notifier_enabler_attach_capture_bytecode( |
1555 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
49cde654 | 1556 | struct lttng_ust_bytecode_node **bytecode) |
d37ecb3f | 1557 | { |
49cde654 | 1558 | (*bytecode)->enabler = lttng_event_notifier_enabler_as_enabler( |
d37ecb3f | 1559 | event_notifier_enabler); |
49cde654 | 1560 | cds_list_add_tail(&(*bytecode)->node, |
d37ecb3f | 1561 | &event_notifier_enabler->capture_bytecode_head); |
49cde654 MD |
1562 | /* Take ownership of bytecode */ |
1563 | *bytecode = NULL; | |
d37ecb3f FD |
1564 | event_notifier_enabler->num_captures++; |
1565 | ||
1566 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1567 | return 0; | |
1568 | } | |
1569 | ||
d8d2416d FD |
1570 | int lttng_event_notifier_enabler_attach_exclusion( |
1571 | struct lttng_event_notifier_enabler *event_notifier_enabler, | |
e9fe6aad | 1572 | struct lttng_ust_excluder_node **excluder) |
d8d2416d FD |
1573 | { |
1574 | _lttng_enabler_attach_exclusion( | |
1575 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler), | |
1576 | excluder); | |
1577 | ||
1578 | lttng_event_notifier_group_sync_enablers(event_notifier_enabler->group); | |
1579 | return 0; | |
1580 | } | |
1581 | ||
fd17d7ce MD |
1582 | int lttng_attach_context(struct lttng_ust_abi_context *context_param, |
1583 | union lttng_ust_abi_args *uargs, | |
f69fe5fb | 1584 | struct lttng_ust_ctx **ctx, struct lttng_ust_session *session) |
e58095ef | 1585 | { |
457a6b58 | 1586 | /* |
e58095ef MD |
1587 | * We cannot attach a context after trace has been started for a |
1588 | * session because the metadata does not allow expressing this | |
1589 | * information outside of the original channel scope. | |
457a6b58 | 1590 | */ |
bdb12629 | 1591 | if (session->priv->been_active) |
e58095ef | 1592 | return -EPERM; |
457a6b58 | 1593 | |
e58095ef | 1594 | switch (context_param->ctx) { |
fd17d7ce | 1595 | case LTTNG_UST_ABI_CONTEXT_PTHREAD_ID: |
e58095ef | 1596 | return lttng_add_pthread_id_to_ctx(ctx); |
fd17d7ce | 1597 | case LTTNG_UST_ABI_CONTEXT_PERF_THREAD_COUNTER: |
d58d1454 | 1598 | { |
fd17d7ce | 1599 | struct lttng_ust_abi_perf_counter_ctx *perf_ctx_param; |
d58d1454 MD |
1600 | |
1601 | perf_ctx_param = &context_param->u.perf_counter; | |
1602 | return lttng_add_perf_counter_to_ctx( | |
1603 | perf_ctx_param->type, | |
1604 | perf_ctx_param->config, | |
1605 | perf_ctx_param->name, | |
1606 | ctx); | |
1607 | } | |
fd17d7ce | 1608 | case LTTNG_UST_ABI_CONTEXT_VTID: |
e58095ef | 1609 | return lttng_add_vtid_to_ctx(ctx); |
fd17d7ce | 1610 | case LTTNG_UST_ABI_CONTEXT_VPID: |
e58095ef | 1611 | return lttng_add_vpid_to_ctx(ctx); |
fd17d7ce | 1612 | case LTTNG_UST_ABI_CONTEXT_PROCNAME: |
e58095ef | 1613 | return lttng_add_procname_to_ctx(ctx); |
fd17d7ce | 1614 | case LTTNG_UST_ABI_CONTEXT_IP: |
96f85541 | 1615 | return lttng_add_ip_to_ctx(ctx); |
fd17d7ce | 1616 | case LTTNG_UST_ABI_CONTEXT_CPU_ID: |
c7ea8487 | 1617 | return lttng_add_cpu_id_to_ctx(ctx); |
fd17d7ce | 1618 | case LTTNG_UST_ABI_CONTEXT_APP_CONTEXT: |
8e696cfa MD |
1619 | return lttng_ust_add_app_context_to_ctx_rcu(uargs->app_context.ctxname, |
1620 | ctx); | |
fd17d7ce | 1621 | case LTTNG_UST_ABI_CONTEXT_CGROUP_NS: |
735bef47 | 1622 | return lttng_add_cgroup_ns_to_ctx(ctx); |
fd17d7ce | 1623 | case LTTNG_UST_ABI_CONTEXT_IPC_NS: |
735bef47 | 1624 | return lttng_add_ipc_ns_to_ctx(ctx); |
fd17d7ce | 1625 | case LTTNG_UST_ABI_CONTEXT_MNT_NS: |
735bef47 | 1626 | return lttng_add_mnt_ns_to_ctx(ctx); |
fd17d7ce | 1627 | case LTTNG_UST_ABI_CONTEXT_NET_NS: |
735bef47 | 1628 | return lttng_add_net_ns_to_ctx(ctx); |
fd17d7ce | 1629 | case LTTNG_UST_ABI_CONTEXT_PID_NS: |
735bef47 | 1630 | return lttng_add_pid_ns_to_ctx(ctx); |
fd17d7ce | 1631 | case LTTNG_UST_ABI_CONTEXT_TIME_NS: |
cefef7a7 | 1632 | return lttng_add_time_ns_to_ctx(ctx); |
fd17d7ce | 1633 | case LTTNG_UST_ABI_CONTEXT_USER_NS: |
735bef47 | 1634 | return lttng_add_user_ns_to_ctx(ctx); |
fd17d7ce | 1635 | case LTTNG_UST_ABI_CONTEXT_UTS_NS: |
735bef47 | 1636 | return lttng_add_uts_ns_to_ctx(ctx); |
fd17d7ce | 1637 | case LTTNG_UST_ABI_CONTEXT_VUID: |
fca2f191 | 1638 | return lttng_add_vuid_to_ctx(ctx); |
fd17d7ce | 1639 | case LTTNG_UST_ABI_CONTEXT_VEUID: |
fca2f191 | 1640 | return lttng_add_veuid_to_ctx(ctx); |
fd17d7ce | 1641 | case LTTNG_UST_ABI_CONTEXT_VSUID: |
fca2f191 | 1642 | return lttng_add_vsuid_to_ctx(ctx); |
fd17d7ce | 1643 | case LTTNG_UST_ABI_CONTEXT_VGID: |
fca2f191 | 1644 | return lttng_add_vgid_to_ctx(ctx); |
fd17d7ce | 1645 | case LTTNG_UST_ABI_CONTEXT_VEGID: |
fca2f191 | 1646 | return lttng_add_vegid_to_ctx(ctx); |
fd17d7ce | 1647 | case LTTNG_UST_ABI_CONTEXT_VSGID: |
fca2f191 | 1648 | return lttng_add_vsgid_to_ctx(ctx); |
e58095ef MD |
1649 | default: |
1650 | return -EINVAL; | |
457a6b58 | 1651 | } |
457a6b58 MD |
1652 | } |
1653 | ||
2208d8b5 MJ |
1654 | int lttng_event_enabler_attach_context( |
1655 | struct lttng_event_enabler *enabler __attribute__((unused)), | |
1656 | struct lttng_ust_abi_context *context_param __attribute__((unused))) | |
457a6b58 | 1657 | { |
e58095ef | 1658 | return -ENOSYS; |
457a6b58 MD |
1659 | } |
1660 | ||
d871c65b | 1661 | void lttng_event_enabler_destroy(struct lttng_event_enabler *event_enabler) |
457a6b58 | 1662 | { |
d871c65b FD |
1663 | if (!event_enabler) { |
1664 | return; | |
0f63324a | 1665 | } |
d871c65b | 1666 | cds_list_del(&event_enabler->node); |
0f63324a | 1667 | |
d871c65b | 1668 | lttng_enabler_destroy(lttng_event_enabler_as_enabler(event_enabler)); |
e58095ef | 1669 | |
d871c65b FD |
1670 | lttng_destroy_context(event_enabler->ctx); |
1671 | free(event_enabler); | |
457a6b58 MD |
1672 | } |
1673 | ||
e58095ef | 1674 | /* |
d871c65b | 1675 | * lttng_session_sync_event_enablers should be called just before starting a |
e58095ef MD |
1676 | * session. |
1677 | */ | |
457a6b58 | 1678 | static |
f69fe5fb | 1679 | void lttng_session_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1680 | { |
d871c65b | 1681 | struct lttng_event_enabler *event_enabler; |
2e70391c | 1682 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
457a6b58 | 1683 | |
bdb12629 | 1684 | cds_list_for_each_entry(event_enabler, &session->priv->enablers_head, node) |
ba99fbe2 | 1685 | lttng_event_enabler_ref_event_recorders(event_enabler); |
e58095ef MD |
1686 | /* |
1687 | * For each event, if at least one of its enablers is enabled, | |
ac6b4ac6 MD |
1688 | * and its channel and session transient states are enabled, we |
1689 | * enable the event, else we disable it. | |
e58095ef | 1690 | */ |
2e70391c | 1691 | cds_list_for_each_entry(event_recorder_priv, &session->priv->events_head, node) { |
e58095ef | 1692 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1693 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1694 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1695 | int nr_filters = 0; | |
e58095ef MD |
1696 | |
1697 | /* Enable events */ | |
1698 | cds_list_for_each_entry(enabler_ref, | |
2e70391c | 1699 | &event_recorder_priv->parent.enablers_ref_head, node) { |
e58095ef MD |
1700 | if (enabler_ref->ref->enabled) { |
1701 | enabled = 1; | |
1702 | break; | |
1703 | } | |
1704 | } | |
ac6b4ac6 MD |
1705 | /* |
1706 | * Enabled state is based on union of enablers, with | |
1707 | * intesection of session and channel transient enable | |
1708 | * states. | |
1709 | */ | |
e7bc0ef6 | 1710 | enabled = enabled && session->priv->tstate && event_recorder_priv->pub->chan->priv->parent.tstate; |
ac6b4ac6 | 1711 | |
2e70391c | 1712 | CMM_STORE_SHARED(event_recorder_priv->pub->parent->enabled, enabled); |
ac6b4ac6 MD |
1713 | /* |
1714 | * Sync tracepoint registration with event enabled | |
1715 | * state. | |
1716 | */ | |
1717 | if (enabled) { | |
2e70391c | 1718 | if (!event_recorder_priv->parent.registered) |
ba99fbe2 | 1719 | register_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1720 | } else { |
2e70391c | 1721 | if (event_recorder_priv->parent.registered) |
ba99fbe2 | 1722 | unregister_event(event_recorder_priv->parent.pub); |
ac6b4ac6 | 1723 | } |
457a6b58 | 1724 | |
1f49fc05 | 1725 | /* Check if has enablers without bytecode enabled */ |
dcdeaff0 | 1726 | cds_list_for_each_entry(enabler_ref, |
2e70391c | 1727 | &event_recorder_priv->parent.enablers_ref_head, node) { |
1f49fc05 MD |
1728 | if (enabler_ref->ref->enabled |
1729 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1730 | has_enablers_without_filter_bytecode = 1; |
dcdeaff0 MD |
1731 | break; |
1732 | } | |
1733 | } | |
a2e4d05e MD |
1734 | event_recorder_priv->parent.has_enablers_without_filter_bytecode = |
1735 | has_enablers_without_filter_bytecode; | |
dcdeaff0 | 1736 | |
e58095ef MD |
1737 | /* Enable filters */ |
1738 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1739 | &event_recorder_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1740 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1741 | nr_filters++; |
457a6b58 | 1742 | } |
a2e4d05e MD |
1743 | CMM_STORE_SHARED(event_recorder_priv->parent.pub->eval_filter, |
1744 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
457a6b58 | 1745 | } |
d10a2205 | 1746 | lttng_ust_tp_probe_prune_release_queue(); |
457a6b58 MD |
1747 | } |
1748 | ||
4296085e MD |
1749 | /* Support for event notifier is introduced by probe provider major version 2. */ |
1750 | static | |
4e48b5d2 | 1751 | bool lttng_ust_probe_supports_event_notifier(const struct lttng_ust_probe_desc *probe_desc) |
4296085e MD |
1752 | { |
1753 | return probe_desc->major >= 2; | |
1754 | } | |
1755 | ||
d8d2416d FD |
1756 | static |
1757 | void lttng_create_event_notifier_if_missing( | |
1758 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1759 | { | |
1760 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
4e48b5d2 | 1761 | struct lttng_ust_registered_probe *reg_probe; |
d8d2416d FD |
1762 | struct cds_list_head *probe_list; |
1763 | int i; | |
1764 | ||
1765 | probe_list = lttng_get_probe_list_head(); | |
1766 | ||
4e48b5d2 MD |
1767 | cds_list_for_each_entry(reg_probe, probe_list, head) { |
1768 | const struct lttng_ust_probe_desc *probe_desc = reg_probe->desc; | |
1769 | ||
d8d2416d FD |
1770 | for (i = 0; i < probe_desc->nr_events; i++) { |
1771 | int ret; | |
1772 | bool found = false; | |
4e48b5d2 | 1773 | const struct lttng_ust_event_desc *desc; |
115db533 | 1774 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1775 | struct cds_hlist_head *head; |
1776 | struct cds_hlist_node *node; | |
1777 | ||
1778 | desc = probe_desc->event_desc[i]; | |
d37ecb3f | 1779 | |
d8d2416d FD |
1780 | if (!lttng_desc_match_enabler(desc, |
1781 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler))) | |
1782 | continue; | |
1783 | ||
1784 | /* | |
1785 | * Given the current event_notifier group, get the bucket that | |
1786 | * the target event_notifier would be if it was already | |
1787 | * created. | |
1788 | */ | |
1789 | head = borrow_hash_table_bucket( | |
1790 | event_notifier_group->event_notifiers_ht.table, | |
1791 | LTTNG_UST_EVENT_NOTIFIER_HT_SIZE, desc); | |
1792 | ||
115db533 | 1793 | cds_hlist_for_each_entry(event_notifier_priv, node, head, hlist) { |
d8d2416d FD |
1794 | /* |
1795 | * Check if event_notifier already exists by checking | |
1796 | * if the event_notifier and enabler share the same | |
1797 | * description and id. | |
1798 | */ | |
115db533 MD |
1799 | if (event_notifier_priv->parent.desc == desc && |
1800 | event_notifier_priv->parent.user_token == event_notifier_enabler->user_token) { | |
d8d2416d FD |
1801 | found = true; |
1802 | break; | |
1803 | } | |
1804 | } | |
1805 | ||
1806 | if (found) | |
1807 | continue; | |
1808 | ||
4296085e MD |
1809 | /* Check that the probe supports event notifiers, else report the error. */ |
1810 | if (!lttng_ust_probe_supports_event_notifier(probe_desc)) { | |
5b4c6da4 | 1811 | ERR("Probe \"%s\" contains event \"%s:%s\" which matches an enabled event notifier, " |
4296085e MD |
1812 | "but its version (%u.%u) is too old and does not implement event notifiers. " |
1813 | "It needs to be recompiled against a newer version of LTTng-UST, otherwise " | |
1814 | "this event will not generate any notification.", | |
5b4c6da4 MD |
1815 | probe_desc->provider_name, |
1816 | probe_desc->provider_name, desc->event_name, | |
4296085e MD |
1817 | probe_desc->major, |
1818 | probe_desc->minor); | |
1819 | continue; | |
1820 | } | |
d8d2416d FD |
1821 | /* |
1822 | * We need to create a event_notifier for this event probe. | |
1823 | */ | |
1824 | ret = lttng_event_notifier_create(desc, | |
1825 | event_notifier_enabler->user_token, | |
6566528b | 1826 | event_notifier_enabler->error_counter_index, |
d8d2416d FD |
1827 | event_notifier_group); |
1828 | if (ret) { | |
5b4c6da4 MD |
1829 | DBG("Unable to create event_notifier \"%s:%s\", error %d\n", |
1830 | probe_desc->provider_name, | |
1831 | probe_desc->event_desc[i]->event_name, ret); | |
d8d2416d FD |
1832 | } |
1833 | } | |
1834 | } | |
1835 | } | |
1836 | ||
1837 | /* | |
1838 | * Create event_notifiers associated with a event_notifier enabler (if not already present). | |
1839 | */ | |
1840 | static | |
1841 | int lttng_event_notifier_enabler_ref_event_notifiers( | |
1842 | struct lttng_event_notifier_enabler *event_notifier_enabler) | |
1843 | { | |
1844 | struct lttng_event_notifier_group *event_notifier_group = event_notifier_enabler->group; | |
115db533 | 1845 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1846 | |
1847 | /* | |
1848 | * Only try to create event_notifiers for enablers that are enabled, the user | |
1849 | * might still be attaching filter or exclusion to the | |
1850 | * event_notifier_enabler. | |
1851 | */ | |
1852 | if (!lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)->enabled) | |
1853 | goto end; | |
1854 | ||
1855 | /* First, ensure that probe event_notifiers are created for this enabler. */ | |
1856 | lttng_create_event_notifier_if_missing(event_notifier_enabler); | |
1857 | ||
1858 | /* Link the created event_notifier with its associated enabler. */ | |
115db533 | 1859 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d FD |
1860 | struct lttng_enabler_ref *enabler_ref; |
1861 | ||
115db533 | 1862 | if (!lttng_event_notifier_enabler_match_event_notifier(event_notifier_enabler, event_notifier_priv->pub)) |
d8d2416d FD |
1863 | continue; |
1864 | ||
115db533 | 1865 | enabler_ref = lttng_enabler_ref(&event_notifier_priv->parent.enablers_ref_head, |
d8d2416d FD |
1866 | lttng_event_notifier_enabler_as_enabler(event_notifier_enabler)); |
1867 | if (!enabler_ref) { | |
1868 | /* | |
1869 | * If no backward ref, create it. | |
1870 | * Add backward ref from event_notifier to enabler. | |
1871 | */ | |
1872 | enabler_ref = zmalloc(sizeof(*enabler_ref)); | |
1873 | if (!enabler_ref) | |
1874 | return -ENOMEM; | |
1875 | ||
1876 | enabler_ref->ref = lttng_event_notifier_enabler_as_enabler( | |
1877 | event_notifier_enabler); | |
1878 | cds_list_add(&enabler_ref->node, | |
115db533 | 1879 | &event_notifier_priv->parent.enablers_ref_head); |
d8d2416d FD |
1880 | } |
1881 | ||
1882 | /* | |
1883 | * Link filter bytecodes if not linked yet. | |
1884 | */ | |
115db533 | 1885 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
621c07fc | 1886 | &event_notifier_group->ctx, |
a2e4d05e | 1887 | &event_notifier_priv->parent.filter_bytecode_runtime_head, |
621c07fc | 1888 | <tng_event_notifier_enabler_as_enabler(event_notifier_enabler)->filter_bytecode_head); |
d37ecb3f FD |
1889 | |
1890 | /* | |
1891 | * Link capture bytecodes if not linked yet. | |
1892 | */ | |
115db533 | 1893 | lttng_enabler_link_bytecode(event_notifier_priv->parent.desc, |
a2e4d05e | 1894 | &event_notifier_group->ctx, &event_notifier_priv->capture_bytecode_runtime_head, |
d37ecb3f FD |
1895 | &event_notifier_enabler->capture_bytecode_head); |
1896 | ||
115db533 | 1897 | event_notifier_priv->num_captures = event_notifier_enabler->num_captures; |
d8d2416d FD |
1898 | } |
1899 | end: | |
1900 | return 0; | |
1901 | } | |
1902 | ||
1903 | static | |
1904 | void lttng_event_notifier_group_sync_enablers(struct lttng_event_notifier_group *event_notifier_group) | |
1905 | { | |
1906 | struct lttng_event_notifier_enabler *event_notifier_enabler; | |
115db533 | 1907 | struct lttng_ust_event_notifier_private *event_notifier_priv; |
d8d2416d FD |
1908 | |
1909 | cds_list_for_each_entry(event_notifier_enabler, &event_notifier_group->enablers_head, node) | |
1910 | lttng_event_notifier_enabler_ref_event_notifiers(event_notifier_enabler); | |
1911 | ||
1912 | /* | |
1913 | * For each event_notifier, if at least one of its enablers is enabled, | |
1914 | * we enable the event_notifier, else we disable it. | |
1915 | */ | |
115db533 | 1916 | cds_list_for_each_entry(event_notifier_priv, &event_notifier_group->event_notifiers_head, node) { |
d8d2416d | 1917 | struct lttng_enabler_ref *enabler_ref; |
5469a374 | 1918 | struct lttng_ust_bytecode_runtime *runtime; |
a2e4d05e MD |
1919 | int enabled = 0, has_enablers_without_filter_bytecode = 0; |
1920 | int nr_filters = 0, nr_captures = 0; | |
d8d2416d FD |
1921 | |
1922 | /* Enable event_notifiers */ | |
1923 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1924 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1925 | if (enabler_ref->ref->enabled) { |
1926 | enabled = 1; | |
1927 | break; | |
1928 | } | |
1929 | } | |
1930 | ||
115db533 | 1931 | CMM_STORE_SHARED(event_notifier_priv->pub->parent->enabled, enabled); |
d8d2416d FD |
1932 | /* |
1933 | * Sync tracepoint registration with event_notifier enabled | |
1934 | * state. | |
1935 | */ | |
1936 | if (enabled) { | |
115db533 | 1937 | if (!event_notifier_priv->parent.registered) |
ba99fbe2 | 1938 | register_event(event_notifier_priv->parent.pub); |
d8d2416d | 1939 | } else { |
115db533 | 1940 | if (event_notifier_priv->parent.registered) |
ba99fbe2 | 1941 | unregister_event(event_notifier_priv->parent.pub); |
d8d2416d FD |
1942 | } |
1943 | ||
1944 | /* Check if has enablers without bytecode enabled */ | |
1945 | cds_list_for_each_entry(enabler_ref, | |
115db533 | 1946 | &event_notifier_priv->parent.enablers_ref_head, node) { |
d8d2416d FD |
1947 | if (enabler_ref->ref->enabled |
1948 | && cds_list_empty(&enabler_ref->ref->filter_bytecode_head)) { | |
a2e4d05e | 1949 | has_enablers_without_filter_bytecode = 1; |
d8d2416d FD |
1950 | break; |
1951 | } | |
1952 | } | |
a2e4d05e MD |
1953 | event_notifier_priv->parent.has_enablers_without_filter_bytecode = |
1954 | has_enablers_without_filter_bytecode; | |
d8d2416d FD |
1955 | |
1956 | /* Enable filters */ | |
1957 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1958 | &event_notifier_priv->parent.filter_bytecode_runtime_head, node) { |
22c30e27 | 1959 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1960 | nr_filters++; |
d8d2416d | 1961 | } |
a2e4d05e MD |
1962 | CMM_STORE_SHARED(event_notifier_priv->parent.pub->eval_filter, |
1963 | !(has_enablers_without_filter_bytecode || !nr_filters)); | |
d37ecb3f FD |
1964 | |
1965 | /* Enable captures. */ | |
1966 | cds_list_for_each_entry(runtime, | |
a2e4d05e | 1967 | &event_notifier_priv->capture_bytecode_runtime_head, node) { |
22c30e27 | 1968 | lttng_bytecode_sync_state(runtime); |
a2e4d05e | 1969 | nr_captures++; |
d37ecb3f | 1970 | } |
a2e4d05e MD |
1971 | CMM_STORE_SHARED(event_notifier_priv->pub->eval_capture, |
1972 | !!nr_captures); | |
d8d2416d | 1973 | } |
d10a2205 | 1974 | lttng_ust_tp_probe_prune_release_queue(); |
d8d2416d FD |
1975 | } |
1976 | ||
e58095ef MD |
1977 | /* |
1978 | * Apply enablers to session events, adding events to session if need | |
1979 | * be. It is required after each modification applied to an active | |
1980 | * session, and right before session "start". | |
1981 | * "lazy" sync means we only sync if required. | |
1982 | */ | |
1983 | static | |
f69fe5fb | 1984 | void lttng_session_lazy_sync_event_enablers(struct lttng_ust_session *session) |
457a6b58 | 1985 | { |
e58095ef MD |
1986 | /* We can skip if session is not active */ |
1987 | if (!session->active) | |
1988 | return; | |
d871c65b | 1989 | lttng_session_sync_event_enablers(session); |
457a6b58 | 1990 | } |
53569322 MD |
1991 | |
1992 | /* | |
1993 | * Update all sessions with the given app context. | |
1994 | * Called with ust lock held. | |
1995 | * This is invoked when an application context gets loaded/unloaded. It | |
1996 | * ensures the context callbacks are in sync with the application | |
1997 | * context (either app context callbacks, or dummy callbacks). | |
1998 | */ | |
1999 | void lttng_ust_context_set_session_provider(const char *name, | |
4e48b5d2 | 2000 | size_t (*get_size)(void *priv, size_t offset), |
b5457df5 | 2001 | void (*record)(void *priv, struct lttng_ust_ring_buffer_ctx *ctx, |
e7bc0ef6 | 2002 | struct lttng_ust_channel_buffer *chan), |
4e48b5d2 MD |
2003 | void (*get_value)(void *priv, struct lttng_ust_ctx_value *value), |
2004 | void *priv) | |
53569322 | 2005 | { |
bdb12629 | 2006 | struct lttng_ust_session_private *session_priv; |
53569322 | 2007 | |
bdb12629 | 2008 | cds_list_for_each_entry(session_priv, &sessions, node) { |
e7bc0ef6 | 2009 | struct lttng_ust_channel_buffer_private *chan; |
2e70391c | 2010 | struct lttng_ust_event_recorder_private *event_recorder_priv; |
53569322 MD |
2011 | int ret; |
2012 | ||
bdb12629 | 2013 | ret = lttng_ust_context_set_provider_rcu(&session_priv->ctx, |
4e48b5d2 | 2014 | name, get_size, record, get_value, priv); |
53569322 MD |
2015 | if (ret) |
2016 | abort(); | |
bdb12629 | 2017 | cds_list_for_each_entry(chan, &session_priv->chan_head, node) { |
0950190a | 2018 | ret = lttng_ust_context_set_provider_rcu(&chan->ctx, |
4e48b5d2 | 2019 | name, get_size, record, get_value, priv); |
53569322 MD |
2020 | if (ret) |
2021 | abort(); | |
2022 | } | |
2e70391c | 2023 | cds_list_for_each_entry(event_recorder_priv, &session_priv->events_head, node) { |
a40b5b8c | 2024 | ret = lttng_ust_context_set_provider_rcu(&event_recorder_priv->ctx, |
4e48b5d2 | 2025 | name, get_size, record, get_value, priv); |
53569322 MD |
2026 | if (ret) |
2027 | abort(); | |
2028 | } | |
2029 | } | |
2030 | } | |
d8d2416d FD |
2031 | |
2032 | /* | |
2033 | * Update all event_notifier groups with the given app context. | |
2034 | * Called with ust lock held. | |
2035 | * This is invoked when an application context gets loaded/unloaded. It | |
2036 | * ensures the context callbacks are in sync with the application | |
2037 | * context (either app context callbacks, or dummy callbacks). | |
2038 | */ | |
2039 | void lttng_ust_context_set_event_notifier_group_provider(const char *name, | |
4e48b5d2 | 2040 | size_t (*get_size)(void *priv, size_t offset), |
b5457df5 | 2041 | void (*record)(void *priv, struct lttng_ust_ring_buffer_ctx *ctx, |
e7bc0ef6 | 2042 | struct lttng_ust_channel_buffer *chan), |
4e48b5d2 MD |
2043 | void (*get_value)(void *priv, struct lttng_ust_ctx_value *value), |
2044 | void *priv) | |
d8d2416d FD |
2045 | { |
2046 | struct lttng_event_notifier_group *event_notifier_group; | |
2047 | ||
2048 | cds_list_for_each_entry(event_notifier_group, &event_notifier_groups, node) { | |
2049 | int ret; | |
2050 | ||
2051 | ret = lttng_ust_context_set_provider_rcu( | |
2052 | &event_notifier_group->ctx, | |
4e48b5d2 | 2053 | name, get_size, record, get_value, priv); |
d8d2416d FD |
2054 | if (ret) |
2055 | abort(); | |
2056 | } | |
2057 | } | |
9daacd1a MD |
2058 | |
2059 | int lttng_ust_session_uuid_validate(struct lttng_ust_session *session, | |
2060 | unsigned char *uuid) | |
2061 | { | |
2062 | if (!session) | |
2063 | return 0; | |
2064 | /* Compare UUID with session. */ | |
2065 | if (session->priv->uuid_set) { | |
2066 | if (memcmp(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN)) { | |
2067 | return -1; | |
2068 | } | |
2069 | } else { | |
2070 | memcpy(session->priv->uuid, uuid, LTTNG_UST_UUID_LEN); | |
2071 | session->priv->uuid_set = true; | |
2072 | } | |
2073 | return 0; | |
2074 | ||
2075 | } |