2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 #include <sys/types.h>
29 #include <urcu/compiler.h>
31 #include <lttng-share.h>
33 #include "hashtable.h"
35 #include "ust-consumer.h"
39 * Delete ust app event safely. RCU read lock must be held before calling
42 static void delete_ust_app_event(int sock
, struct ust_app_event
*ua_event
)
44 /* TODO : remove context */
45 //struct ust_app_ctx *ltctx;
46 //cds_lfht_for_each_entry(lte->ctx, &iter, ltctx, node) {
47 // delete_ust_app_ctx(sock, ltctx);
50 if (ua_event
->obj
!= NULL
) {
51 ustctl_release_object(sock
, ua_event
->obj
);
58 * Delete ust app stream safely. RCU read lock must be held before calling
61 static void delete_ust_app_stream(int sock
, struct ltt_ust_stream
*stream
)
63 ustctl_release_object(sock
, stream
->obj
);
69 * Delete ust app channel safely. RCU read lock must be held before calling
72 static void delete_ust_app_channel(int sock
, struct ust_app_channel
*ua_chan
)
75 struct cds_lfht_iter iter
;
76 struct ust_app_event
*ua_event
;
77 struct ltt_ust_stream
*stream
, *stmp
;
79 cds_list_for_each_entry_safe(stream
, stmp
, &ua_chan
->streams
.head
, list
) {
80 cds_list_del(&stream
->list
);
81 delete_ust_app_stream(sock
, stream
);
84 /* TODO : remove channel context */
85 //cds_lfht_for_each_entry(ltc->ctx, &iter, ltctx, node) {
86 // hashtable_del(ltc->ctx, &iter);
87 // delete_ust_app_ctx(sock, ltctx);
89 //ret = hashtable_destroy(ltc->ctx);
91 cds_lfht_for_each_entry(ua_chan
->events
, &iter
, ua_event
, node
) {
92 hashtable_del(ua_chan
->events
, &iter
);
93 delete_ust_app_event(sock
, ua_event
);
96 ret
= hashtable_destroy(ua_chan
->events
);
98 ERR("UST app destroy session hashtable failed");
102 if (ua_chan
->obj
!= NULL
) {
103 ustctl_release_object(sock
, ua_chan
->obj
);
113 * Delete ust app session safely. RCU read lock must be held before calling
116 static void delete_ust_app_session(int sock
,
117 struct ust_app_session
*ua_sess
)
120 struct cds_lfht_iter iter
;
121 struct ust_app_channel
*ua_chan
;
123 if (ua_sess
->metadata
) {
124 ustctl_release_object(sock
, ua_sess
->metadata
->stream_obj
);
125 free(ua_sess
->metadata
->stream_obj
);
126 ustctl_release_object(sock
, ua_sess
->metadata
->obj
);
127 free(ua_sess
->metadata
->obj
);
130 cds_lfht_for_each_entry(ua_sess
->channels
, &iter
, ua_chan
, node
) {
131 hashtable_del(ua_sess
->channels
, &iter
);
132 delete_ust_app_channel(sock
, ua_chan
);
135 ret
= hashtable_destroy(ua_sess
->channels
);
137 ERR("UST app destroy session hashtable failed");
146 * Delete a traceable application structure from the global list. Never call
147 * this function outside of a call_rcu call.
149 static void delete_ust_app(struct ust_app
*app
)
152 struct cds_lfht_node
*node
;
153 struct cds_lfht_iter iter
;
154 struct ust_app_session
*ua_sess
;
159 /* Remove from key hash table */
160 node
= hashtable_lookup(ust_app_sock_key_map
,
161 (void *) ((unsigned long) app
->key
.sock
), sizeof(void *), &iter
);
163 /* Not suppose to happen */
164 ERR("UST app key %d not found in key hash table", app
->key
.sock
);
168 ret
= hashtable_del(ust_app_sock_key_map
, &iter
);
170 ERR("UST app unable to delete app sock %d from key hash table",
173 DBG2("UST app pair sock %d key %d deleted",
174 app
->key
.sock
, app
->key
.pid
);
177 /* Socket is already closed at this point */
179 /* Delete ust app sessions info */
180 sock
= app
->key
.sock
;
183 cds_lfht_for_each_entry(app
->sessions
, &iter
, ua_sess
, node
) {
184 hashtable_del(app
->sessions
, &iter
);
185 delete_ust_app_session(app
->key
.sock
, ua_sess
);
188 ret
= hashtable_destroy(app
->sessions
);
190 ERR("UST app destroy session hashtable failed");
195 * Wait until we have removed the key from the sock hash table
196 * before closing this socket, otherwise an application could
197 * re-use the socket ID and race with the teardown, using the
198 * same hash table entry.
202 DBG2("UST app pid %d deleted", app
->key
.pid
);
209 * URCU intermediate call to delete an UST app.
211 static void delete_ust_app_rcu(struct rcu_head
*head
)
213 struct cds_lfht_node
*node
=
214 caa_container_of(head
, struct cds_lfht_node
, head
);
215 struct ust_app
*app
=
216 caa_container_of(node
, struct ust_app
, node
);
222 * Find an ust_app using the sock and return it. RCU read side lock must be
223 * held before calling this helper function.
225 static struct ust_app
*find_app_by_sock(int sock
)
227 struct cds_lfht_node
*node
;
228 struct ust_app_key
*key
;
229 struct cds_lfht_iter iter
;
231 node
= hashtable_lookup(ust_app_sock_key_map
,
232 (void *)((unsigned long) sock
), sizeof(void *), &iter
);
234 DBG2("UST app find by sock %d key not found", sock
);
238 key
= caa_container_of(node
, struct ust_app_key
, node
);
240 node
= hashtable_lookup(ust_app_ht
,
241 (void *)((unsigned long) key
->pid
), sizeof(void *), &iter
);
243 DBG2("UST app find by sock %d not found", sock
);
246 return caa_container_of(node
, struct ust_app
, node
);
253 * Disable the specified event on to UST tracer for the UST session.
255 static int disable_ust_event(struct ust_app
*app
,
256 struct ust_app_session
*ua_sess
, struct ust_app_event
*ua_event
)
260 ret
= ustctl_disable(app
->key
.sock
, ua_event
->obj
);
262 ERR("UST app event %s disable failed for app (pid: %d) "
263 "and session handle %d with ret %d",
264 ua_event
->attr
.name
, app
->key
.pid
, ua_sess
->handle
, ret
);
268 DBG2("UST app event %s disabled successfully for app (pid: %d)",
269 ua_event
->attr
.name
, app
->key
.pid
);
276 * Disable the specified channel on to UST tracer for the UST session.
278 static int disable_ust_channel(struct ust_app
*app
,
279 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
283 ret
= ustctl_disable(app
->key
.sock
, ua_chan
->obj
);
285 ERR("UST app channel %s disable failed for app (pid: %d) "
286 "and session handle %d with ret %d",
287 ua_chan
->name
, app
->key
.pid
, ua_sess
->handle
, ret
);
291 DBG2("UST app channel %s disabled successfully for app (pid: %d)",
292 ua_chan
->name
, app
->key
.pid
);
299 * Enable the specified channel on to UST tracer for the UST session.
301 static int enable_ust_channel(struct ust_app
*app
,
302 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
306 ret
= ustctl_enable(app
->key
.sock
, ua_chan
->obj
);
308 ERR("UST app channel %s enable failed for app (pid: %d) "
309 "and session handle %d with ret %d",
310 ua_chan
->name
, app
->key
.pid
, ua_sess
->handle
, ret
);
314 ua_chan
->enabled
= 1;
316 DBG2("UST app channel %s enabled successfully for app (pid: %d)",
317 ua_chan
->name
, app
->key
.pid
);
324 * Enable the specified event on to UST tracer for the UST session.
326 static int enable_ust_event(struct ust_app
*app
,
327 struct ust_app_session
*ua_sess
, struct ust_app_event
*ua_event
)
331 ret
= ustctl_enable(app
->key
.sock
, ua_event
->obj
);
333 ERR("UST app event %s enable failed for app (pid: %d) "
334 "and session handle %d with ret %d",
335 ua_event
->attr
.name
, app
->key
.pid
, ua_sess
->handle
, ret
);
339 DBG2("UST app event %s enabled successfully for app (pid: %d)",
340 ua_event
->attr
.name
, app
->key
.pid
);
347 * Open metadata onto the UST tracer for a UST session.
349 static int open_ust_metadata(struct ust_app
*app
,
350 struct ust_app_session
*ua_sess
)
353 struct lttng_ust_channel_attr uattr
;
355 uattr
.overwrite
= ua_sess
->metadata
->attr
.overwrite
;
356 uattr
.subbuf_size
= ua_sess
->metadata
->attr
.subbuf_size
;
357 uattr
.num_subbuf
= ua_sess
->metadata
->attr
.num_subbuf
;
358 uattr
.switch_timer_interval
=
359 ua_sess
->metadata
->attr
.switch_timer_interval
;
360 uattr
.read_timer_interval
=
361 ua_sess
->metadata
->attr
.read_timer_interval
;
362 uattr
.output
= ua_sess
->metadata
->attr
.output
;
364 /* UST tracer metadata creation */
365 ret
= ustctl_open_metadata(app
->key
.sock
, ua_sess
->handle
, &uattr
,
366 &ua_sess
->metadata
->obj
);
368 ERR("UST app open metadata failed for app pid:%d",
378 * Create stream onto the UST tracer for a UST session.
380 static int create_ust_stream(struct ust_app
*app
,
381 struct ust_app_session
*ua_sess
)
385 ret
= ustctl_create_stream(app
->key
.sock
, ua_sess
->metadata
->obj
,
386 &ua_sess
->metadata
->stream_obj
);
388 ERR("UST create metadata stream failed");
397 * Create the specified channel onto the UST tracer for a UST session.
399 static int create_ust_channel(struct ust_app
*app
,
400 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
404 /* TODO: remove cast and use lttng-ust-abi.h */
405 ret
= ustctl_create_channel(app
->key
.sock
, ua_sess
->handle
,
406 (struct lttng_ust_channel_attr
*)&ua_chan
->attr
, &ua_chan
->obj
);
408 DBG("Error creating channel %s for app (pid: %d, sock: %d) "
409 "and session handle %d with ret %d",
410 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
,
411 ua_sess
->handle
, ret
);
415 ua_chan
->handle
= ua_chan
->obj
->handle
;
416 ua_chan
->attr
.shm_fd
= ua_chan
->obj
->shm_fd
;
417 ua_chan
->attr
.wait_fd
= ua_chan
->obj
->wait_fd
;
418 ua_chan
->attr
.memory_map_size
= ua_chan
->obj
->memory_map_size
;
420 DBG2("UST app channel %s created successfully for pid:%d and sock:%d",
421 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
);
423 /* If channel is not enabled, disable it on the tracer */
424 if (!ua_chan
->enabled
) {
425 ret
= disable_ust_channel(app
, ua_sess
, ua_chan
);
436 * Create the specified event onto the UST tracer for a UST session.
439 int create_ust_event(struct ust_app
*app
, struct ust_app_session
*ua_sess
,
440 struct ust_app_channel
*ua_chan
, struct ust_app_event
*ua_event
)
444 /* Create UST event on tracer */
445 ret
= ustctl_create_event(app
->key
.sock
, &ua_event
->attr
, ua_chan
->obj
,
448 ERR("Error ustctl create event %s for app pid: %d with ret %d",
449 ua_event
->attr
.name
, app
->key
.pid
, ret
);
453 ua_event
->handle
= ua_event
->obj
->handle
;
455 DBG2("UST app event %s created successfully for pid:%d",
456 ua_event
->attr
.name
, app
->key
.pid
);
458 /* If event not enabled, disable it on the tracer */
459 if (!ua_event
->enabled
) {
460 ret
= disable_ust_event(app
, ua_sess
, ua_event
);
471 * Alloc new UST app session.
473 static struct ust_app_session
*alloc_ust_app_session(void)
475 struct ust_app_session
*ua_sess
;
477 /* Init most of the default value by allocating and zeroing */
478 ua_sess
= zmalloc(sizeof(struct ust_app_session
));
479 if (ua_sess
== NULL
) {
484 ua_sess
->handle
= -1;
485 ua_sess
->channels
= hashtable_new_str(0);
494 * Alloc new UST app channel.
496 static struct ust_app_channel
*alloc_ust_app_channel(char *name
,
497 struct lttng_ust_channel
*attr
)
499 struct ust_app_channel
*ua_chan
;
501 /* Init most of the default value by allocating and zeroing */
502 ua_chan
= zmalloc(sizeof(struct ust_app_channel
));
503 if (ua_chan
== NULL
) {
508 /* Setup channel name */
509 strncpy(ua_chan
->name
, name
, sizeof(ua_chan
->name
));
510 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
512 ua_chan
->enabled
= 1;
513 ua_chan
->handle
= -1;
514 ua_chan
->ctx
= hashtable_new(0);
515 ua_chan
->events
= hashtable_new_str(0);
516 hashtable_node_init(&ua_chan
->node
, (void *) ua_chan
->name
,
517 strlen(ua_chan
->name
));
519 CDS_INIT_LIST_HEAD(&ua_chan
->streams
.head
);
521 /* Copy attributes */
523 memcpy(&ua_chan
->attr
, attr
, sizeof(ua_chan
->attr
));
526 DBG3("UST app channel %s allocated", ua_chan
->name
);
535 * Alloc new UST app event.
537 static struct ust_app_event
*alloc_ust_app_event(char *name
,
538 struct lttng_ust_event
*attr
)
540 struct ust_app_event
*ua_event
;
542 /* Init most of the default value by allocating and zeroing */
543 ua_event
= zmalloc(sizeof(struct ust_app_event
));
544 if (ua_event
== NULL
) {
549 ua_event
->enabled
= 1;
550 strncpy(ua_event
->name
, name
, sizeof(ua_event
->name
));
551 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
552 ua_event
->ctx
= hashtable_new(0);
553 hashtable_node_init(&ua_event
->node
, (void *) ua_event
->name
,
554 strlen(ua_event
->name
));
556 /* Copy attributes */
558 memcpy(&ua_event
->attr
, attr
, sizeof(ua_event
->attr
));
561 DBG3("UST app event %s allocated", ua_event
->name
);
570 * Copy data between an UST app event and a LTT event.
572 static void shadow_copy_event(struct ust_app_event
*ua_event
,
573 struct ltt_ust_event
*uevent
)
575 strncpy(ua_event
->name
, uevent
->attr
.name
, sizeof(ua_event
->name
));
576 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
578 /* Copy event attributes */
579 memcpy(&ua_event
->attr
, &uevent
->attr
, sizeof(ua_event
->attr
));
581 /* TODO: support copy context */
585 * Copy data between an UST app channel and a LTT channel.
587 static void shadow_copy_channel(struct ust_app_channel
*ua_chan
,
588 struct ltt_ust_channel
*uchan
)
590 struct cds_lfht_iter iter
;
591 struct cds_lfht_node
*ua_event_node
;
592 struct ltt_ust_event
*uevent
;
593 struct ust_app_event
*ua_event
;
595 DBG2("Shadow copy of UST app channel %s", ua_chan
->name
);
597 strncpy(ua_chan
->name
, uchan
->name
, sizeof(ua_chan
->name
));
598 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
599 /* Copy event attributes */
600 memcpy(&ua_chan
->attr
, &uchan
->attr
, sizeof(ua_chan
->attr
));
602 /* TODO: support copy context */
604 /* Copy all events from ltt ust channel to ust app channel */
605 cds_lfht_for_each_entry(uchan
->events
, &iter
, uevent
, node
) {
606 struct cds_lfht_iter uiter
;
608 ua_event_node
= hashtable_lookup(ua_chan
->events
,
609 (void *) uevent
->attr
.name
, strlen(uevent
->attr
.name
),
611 if (ua_event_node
== NULL
) {
612 DBG2("UST event %s not found on shadow copy channel",
614 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
615 if (ua_event
== NULL
) {
618 shadow_copy_event(ua_event
, uevent
);
619 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
623 DBG3("Shadow copy channel done");
627 * Copy data between a UST app session and a regular LTT session.
629 static void shadow_copy_session(struct ust_app_session
*ua_sess
,
630 struct ltt_ust_session
*usess
,
633 struct cds_lfht_node
*ua_chan_node
;
634 struct cds_lfht_iter iter
;
635 struct ltt_ust_channel
*uchan
;
636 struct ust_app_channel
*ua_chan
;
642 /* Get date and time for unique app path */
644 timeinfo
= localtime(&rawtime
);
645 strftime(datetime
, sizeof(datetime
), "%Y%m%d-%H%M%S", timeinfo
);
647 DBG2("Shadow copy of session handle %d", ua_sess
->handle
);
649 ua_sess
->uid
= usess
->uid
;
651 ret
= snprintf(ua_sess
->path
, PATH_MAX
,
653 usess
->pathname
, app
->name
, app
->key
.pid
,
656 PERROR("asprintf UST shadow copy session");
657 /* TODO: We cannot return an error from here.. */
661 /* TODO: support all UST domain */
663 /* Iterate over all channels in global domain. */
664 cds_lfht_for_each_entry(usess
->domain_global
.channels
, &iter
,
666 struct cds_lfht_iter uiter
;
668 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
669 (void *)uchan
->name
, strlen(uchan
->name
),
671 if (ua_chan_node
!= NULL
) {
675 DBG2("Channel %s not found on shadow session copy, creating it",
677 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
678 if (ua_chan
== NULL
) {
679 /* malloc failed... continuing */
683 shadow_copy_channel(ua_chan
, uchan
);
684 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
689 * Lookup sesison wrapper.
692 void __lookup_session_by_app(struct ltt_ust_session
*usess
,
693 struct ust_app
*app
, struct cds_lfht_iter
*iter
)
695 /* Get right UST app session from app */
696 (void) hashtable_lookup(app
->sessions
,
697 (void *) ((unsigned long) usess
->uid
), sizeof(void *),
702 * Return ust app session from the app session hashtable using the UST session
705 static struct ust_app_session
*lookup_session_by_app(
706 struct ltt_ust_session
*usess
, struct ust_app
*app
)
708 struct cds_lfht_iter iter
;
709 struct cds_lfht_node
*node
;
711 __lookup_session_by_app(usess
, app
, &iter
);
712 node
= hashtable_iter_get_node(&iter
);
717 return caa_container_of(node
, struct ust_app_session
, node
);
724 * Create a UST session onto the tracer of app and add it the session
727 * Return ust app session or NULL on error.
729 static struct ust_app_session
*create_ust_app_session(
730 struct ltt_ust_session
*usess
, struct ust_app
*app
)
733 struct ust_app_session
*ua_sess
;
735 ua_sess
= lookup_session_by_app(usess
, app
);
736 if (ua_sess
== NULL
) {
737 DBG2("UST app pid: %d session uid %d not found, creating it",
738 app
->key
.pid
, usess
->uid
);
739 ua_sess
= alloc_ust_app_session();
740 if (ua_sess
== NULL
) {
741 /* Only malloc can failed so something is really wrong */
744 shadow_copy_session(ua_sess
, usess
, app
);
747 if (ua_sess
->handle
== -1) {
748 ret
= ustctl_create_session(app
->key
.sock
);
750 ERR("Error creating session for app pid %d, sock %d",
751 app
->key
.pid
, app
->key
.sock
);
752 /* TODO: free() ua_sess */
756 DBG2("UST app ustctl create session handle %d", ret
);
757 ua_sess
->handle
= ret
;
759 /* Add ust app session to app's HT */
760 hashtable_node_init(&ua_sess
->node
,
761 (void *)((unsigned long) ua_sess
->uid
), sizeof(void *));
762 hashtable_add_unique(app
->sessions
, &ua_sess
->node
);
764 DBG2("UST app session created successfully with handle %d", ret
);
774 * Enable on the tracer side a ust app event for the session and channel.
777 int enable_ust_app_event(struct ust_app_session
*ua_sess
,
778 struct ust_app_event
*ua_event
, struct ust_app
*app
)
782 ret
= enable_ust_event(app
, ua_sess
, ua_event
);
787 ua_event
->enabled
= 1;
794 * Disable on the tracer side a ust app event for the session and channel.
796 static int disable_ust_app_event(struct ust_app_session
*ua_sess
,
797 struct ust_app_channel
*ua_chan
, struct ust_app_event
*ua_event
,
802 ret
= disable_ust_event(app
, ua_sess
, ua_event
);
807 ua_event
->enabled
= 0;
814 * Lookup ust app channel for session and disable it on the tracer side.
817 int disable_ust_app_channel(struct ust_app_session
*ua_sess
,
818 struct ust_app_channel
*ua_chan
, struct ust_app
*app
)
822 ret
= disable_ust_channel(app
, ua_sess
, ua_chan
);
827 ua_chan
->enabled
= 0;
834 * Lookup ust app channel for session and enable it on the tracer side.
836 static int enable_ust_app_channel(struct ust_app_session
*ua_sess
,
837 struct ltt_ust_channel
*uchan
, struct ust_app
*app
)
840 struct cds_lfht_iter iter
;
841 struct cds_lfht_node
*ua_chan_node
;
842 struct ust_app_channel
*ua_chan
;
844 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
845 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
846 if (ua_chan_node
== NULL
) {
847 DBG2("Unable to find channel %s in ust session uid %u",
848 uchan
->name
, ua_sess
->uid
);
852 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
854 ret
= enable_ust_channel(app
, ua_sess
, ua_chan
);
864 * Create UST app channel and create it on the tracer.
866 static struct ust_app_channel
*create_ust_app_channel(
867 struct ust_app_session
*ua_sess
, struct ltt_ust_channel
*uchan
,
871 struct cds_lfht_iter iter
;
872 struct cds_lfht_node
*ua_chan_node
;
873 struct ust_app_channel
*ua_chan
;
875 /* Lookup channel in the ust app session */
876 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
877 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
878 if (ua_chan_node
== NULL
) {
879 DBG2("Unable to find channel %s in ust session uid %u",
880 uchan
->name
, ua_sess
->uid
);
881 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
882 if (ua_chan
== NULL
) {
885 shadow_copy_channel(ua_chan
, uchan
);
887 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
889 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
892 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
904 * Create UST app event and create it on the tracer side.
907 int create_ust_app_event(struct ust_app_session
*ua_sess
,
908 struct ust_app_channel
*ua_chan
, struct ltt_ust_event
*uevent
,
912 struct cds_lfht_iter iter
;
913 struct cds_lfht_node
*ua_event_node
;
914 struct ust_app_event
*ua_event
;
917 ua_event_node
= hashtable_lookup(ua_chan
->events
,
918 (void *)uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
919 if (ua_event_node
!= NULL
) {
920 ERR("UST app event %s already exist. Stopping creation.",
925 /* Does not exist so create one */
926 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
927 if (ua_event
== NULL
) {
928 /* Only malloc can failed so something is really wrong */
932 shadow_copy_event(ua_event
, uevent
);
934 /* Create it on the tracer side */
935 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
937 delete_ust_app_event(app
->key
.sock
, ua_event
);
941 ua_event
->enabled
= 1;
943 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
951 * Create UST metadata and open it on the tracer side.
953 static int create_ust_app_metadata(struct ust_app_session
*ua_sess
,
954 char *pathname
, struct ust_app
*app
)
958 if (ua_sess
->metadata
== NULL
) {
959 /* Allocate UST metadata */
960 ua_sess
->metadata
= trace_ust_create_metadata(pathname
);
961 if (ua_sess
->metadata
== NULL
) {
962 ERR("UST app session %d creating metadata failed",
967 ret
= open_ust_metadata(app
, ua_sess
);
972 DBG2("UST metadata opened for app pid %d", app
->key
.pid
);
975 /* Open UST metadata stream */
976 if (ua_sess
->metadata
->stream_obj
== NULL
) {
977 ret
= create_ust_stream(app
, ua_sess
);
982 ret
= mkdir(ua_sess
->path
, S_IRWXU
| S_IRWXG
);
984 PERROR("mkdir UST metadata");
988 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
,
989 "%s/metadata", ua_sess
->path
);
991 PERROR("asprintf UST create stream");
995 DBG2("UST metadata stream object created for app pid %d",
998 ERR("Attempting to create stream without metadata opened");
1009 * Return pointer to traceable apps list.
1011 struct cds_lfht
*ust_app_get_ht(void)
1017 * Return ust app pointer or NULL if not found.
1019 struct ust_app
*ust_app_find_by_pid(pid_t pid
)
1021 struct cds_lfht_node
*node
;
1022 struct cds_lfht_iter iter
;
1025 node
= hashtable_lookup(ust_app_ht
,
1026 (void *)((unsigned long) pid
), sizeof(void *), &iter
);
1028 DBG2("UST app no found with pid %d", pid
);
1033 DBG2("Found UST app by pid %d", pid
);
1035 return caa_container_of(node
, struct ust_app
, node
);
1043 * Using pid and uid (of the app), allocate a new ust_app struct and
1044 * add it to the global traceable app list.
1046 * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app
1047 * bitness is not supported.
1049 int ust_app_register(struct ust_register_msg
*msg
, int sock
)
1051 struct ust_app
*lta
;
1053 if ((msg
->bits_per_long
== 64 && ust_consumerd64_fd
== -EINVAL
)
1054 || (msg
->bits_per_long
== 32 && ust_consumerd32_fd
== -EINVAL
)) {
1055 ERR("Registration failed: application \"%s\" (pid: %d) has "
1056 "%d-bit long, but no consumerd for this long size is available.\n",
1057 msg
->name
, msg
->pid
, msg
->bits_per_long
);
1061 lta
= zmalloc(sizeof(struct ust_app
));
1067 lta
->ppid
= msg
->ppid
;
1068 lta
->uid
= msg
->uid
;
1069 lta
->gid
= msg
->gid
;
1070 lta
->bits_per_long
= msg
->bits_per_long
;
1071 lta
->v_major
= msg
->major
;
1072 lta
->v_minor
= msg
->minor
;
1073 strncpy(lta
->name
, msg
->name
, sizeof(lta
->name
));
1074 lta
->name
[16] = '\0';
1075 lta
->sessions
= hashtable_new(0);
1078 lta
->key
.pid
= msg
->pid
;
1079 hashtable_node_init(<a
->node
, (void *)((unsigned long)lta
->key
.pid
),
1081 lta
->key
.sock
= sock
;
1082 hashtable_node_init(<a
->key
.node
, (void *)((unsigned long)lta
->key
.sock
),
1086 hashtable_add_unique(ust_app_sock_key_map
, <a
->key
.node
);
1087 hashtable_add_unique(ust_app_ht
, <a
->node
);
1090 DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s"
1091 " (version %d.%d)", lta
->key
.pid
, lta
->ppid
, lta
->uid
, lta
->gid
,
1092 lta
->key
.sock
, lta
->name
, lta
->v_major
, lta
->v_minor
);
1098 * Unregister app by removing it from the global traceable app list and freeing
1101 * The socket is already closed at this point so no close to sock.
1103 void ust_app_unregister(int sock
)
1105 struct ust_app
*lta
;
1106 struct cds_lfht_node
*node
;
1107 struct cds_lfht_iter iter
;
1110 lta
= find_app_by_sock(sock
);
1112 ERR("Unregister app sock %d not found!", sock
);
1116 DBG("PID %d unregistering with sock %d", lta
->key
.pid
, sock
);
1118 /* Get the node reference for a call_rcu */
1119 node
= hashtable_lookup(ust_app_ht
,
1120 (void *)((unsigned long) lta
->key
.pid
), sizeof(void *), &iter
);
1122 ERR("Unable to find app sock %d by pid %d", sock
, lta
->key
.pid
);
1126 hashtable_del(ust_app_ht
, &iter
);
1127 call_rcu(&node
->head
, delete_ust_app_rcu
);
1134 * Return traceable_app_count
1136 unsigned long ust_app_list_count(void)
1138 unsigned long count
;
1141 count
= hashtable_get_count(ust_app_ht
);
1148 * Fill events array with all events name of all registered apps.
1150 int ust_app_list_events(struct lttng_event
**events
)
1153 size_t nbmem
, count
= 0;
1154 struct cds_lfht_iter iter
;
1155 struct ust_app
*app
;
1156 struct lttng_event
*tmp
;
1158 nbmem
= UST_APP_EVENT_LIST_SIZE
;
1159 tmp
= zmalloc(nbmem
* sizeof(struct lttng_event
));
1161 PERROR("zmalloc ust app events");
1168 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1169 handle
= ustctl_tracepoint_list(app
->key
.sock
);
1171 ERR("UST app list events getting handle failed for app pid %d",
1176 while ((ret
= ustctl_tracepoint_list_get(app
->key
.sock
, handle
,
1177 tmp
[count
].name
)) != -ENOENT
) {
1178 if (count
> nbmem
) {
1179 DBG2("Reallocating event list from %zu to %zu bytes", nbmem
,
1180 nbmem
+ UST_APP_EVENT_LIST_SIZE
);
1181 nbmem
+= UST_APP_EVENT_LIST_SIZE
;
1182 tmp
= realloc(tmp
, nbmem
);
1184 PERROR("realloc ust app events");
1190 tmp
[count
].type
= LTTNG_UST_TRACEPOINT
;
1191 tmp
[count
].pid
= app
->key
.pid
;
1192 tmp
[count
].enabled
= -1;
1200 DBG2("UST app list events done (%zu events)", count
);
1209 * Free and clean all traceable apps of the global list.
1211 void ust_app_clean_list(void)
1214 struct cds_lfht_node
*node
;
1215 struct cds_lfht_iter iter
;
1216 struct ust_app
*app
;
1218 DBG2("UST app cleaning registered apps hash table");
1222 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1223 ret
= hashtable_del(ust_app_ht
, &iter
);
1225 call_rcu(&node
->head
, delete_ust_app_rcu
);
1229 hashtable_destroy(ust_app_ht
);
1230 hashtable_destroy(ust_app_sock_key_map
);
1236 * Init UST app hash table.
1238 void ust_app_ht_alloc(void)
1240 ust_app_ht
= hashtable_new(0);
1241 ust_app_sock_key_map
= hashtable_new(0);
1245 * For a specific UST session, disable the channel for all registered apps.
1247 int ust_app_disable_channel_glb(struct ltt_ust_session
*usess
,
1248 struct ltt_ust_channel
*uchan
)
1251 struct cds_lfht_iter iter
;
1252 struct cds_lfht_node
*ua_chan_node
;
1253 struct ust_app
*app
;
1254 struct ust_app_session
*ua_sess
;
1255 struct ust_app_channel
*ua_chan
;
1257 if (usess
== NULL
|| uchan
== NULL
) {
1258 ERR("Disabling UST global channel with NULL values");
1263 DBG2("UST app disabling channel %s from global domain for session uid %d",
1264 uchan
->name
, usess
->uid
);
1268 /* For every registered applications */
1269 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1270 ua_sess
= lookup_session_by_app(usess
, app
);
1271 if (ua_sess
== NULL
) {
1276 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
1277 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
1278 /* If the session if found for the app, the channel must be there */
1279 assert(ua_chan_node
);
1281 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1282 /* The channel must not be already disabled */
1283 assert(ua_chan
->enabled
== 1);
1285 /* Disable channel onto application */
1286 ret
= disable_ust_app_channel(ua_sess
, ua_chan
, app
);
1288 /* XXX: We might want to report this error at some point... */
1300 * For a specific UST session, enable the channel for all registered apps.
1302 int ust_app_enable_channel_glb(struct ltt_ust_session
*usess
,
1303 struct ltt_ust_channel
*uchan
)
1306 struct cds_lfht_iter iter
;
1307 struct ust_app
*app
;
1308 struct ust_app_session
*ua_sess
;
1310 if (usess
== NULL
|| uchan
== NULL
) {
1311 ERR("Adding UST global channel to NULL values");
1316 DBG2("UST app enabling channel %s to global domain for session uid %d",
1317 uchan
->name
, usess
->uid
);
1321 /* For every registered applications */
1322 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1323 ua_sess
= lookup_session_by_app(usess
, app
);
1324 if (ua_sess
== NULL
) {
1328 /* Enable channel onto application */
1329 ret
= enable_ust_app_channel(ua_sess
, uchan
, app
);
1331 /* XXX: We might want to report this error at some point... */
1343 * Disable an event in a channel and for a specific session.
1345 int ust_app_disable_event_glb(struct ltt_ust_session
*usess
,
1346 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1349 struct cds_lfht_iter iter
, uiter
;
1350 struct cds_lfht_node
*ua_chan_node
, *ua_event_node
;
1351 struct ust_app
*app
;
1352 struct ust_app_session
*ua_sess
;
1353 struct ust_app_channel
*ua_chan
;
1354 struct ust_app_event
*ua_event
;
1356 DBG("UST app disabling event %s for all apps in channel "
1357 "%s for session uid %d", uevent
->attr
.name
, uchan
->name
, usess
->uid
);
1361 /* For all registered applications */
1362 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1363 ua_sess
= lookup_session_by_app(usess
, app
);
1364 if (ua_sess
== NULL
) {
1369 /* Lookup channel in the ust app session */
1370 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
1371 (void *)uchan
->name
, strlen(uchan
->name
), &uiter
);
1372 if (ua_chan_node
== NULL
) {
1373 DBG2("Channel %s not found in session uid %d for app pid %d."
1374 "Skipping", uchan
->name
, usess
->uid
, app
->key
.pid
);
1377 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1379 ua_event_node
= hashtable_lookup(ua_chan
->events
,
1380 (void *)uevent
->attr
.name
, strlen(uevent
->attr
.name
), &uiter
);
1381 if (ua_event_node
== NULL
) {
1382 DBG2("Event %s not found in channel %s for app pid %d."
1383 "Skipping", uevent
->attr
.name
, uchan
->name
, app
->key
.pid
);
1386 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
1388 ret
= disable_ust_app_event(ua_sess
, ua_chan
, ua_event
, app
);
1390 /* XXX: Report error someday... */
1401 * For a specific UST session and UST channel, the event for all
1404 int ust_app_disable_all_event_glb(struct ltt_ust_session
*usess
,
1405 struct ltt_ust_channel
*uchan
)
1408 struct cds_lfht_iter iter
, uiter
;
1409 struct cds_lfht_node
*ua_chan_node
;
1410 struct ust_app
*app
;
1411 struct ust_app_session
*ua_sess
;
1412 struct ust_app_channel
*ua_chan
;
1413 struct ust_app_event
*ua_event
;
1415 DBG("UST app disabling all event for all apps in channel "
1416 "%s for session uid %d", uchan
->name
, usess
->uid
);
1420 /* For all registered applications */
1421 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1422 ua_sess
= lookup_session_by_app(usess
, app
);
1423 /* If ua_sess is NULL, there is a code flow error */
1426 /* Lookup channel in the ust app session */
1427 ua_chan_node
= hashtable_lookup(ua_sess
->channels
, (void *)uchan
->name
,
1428 strlen(uchan
->name
), &uiter
);
1429 /* If the channel is not found, there is a code flow error */
1430 assert(ua_chan_node
);
1432 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1434 /* Disable each events of channel */
1435 cds_lfht_for_each_entry(ua_chan
->events
, &uiter
, ua_event
, node
) {
1436 ret
= disable_ust_app_event(ua_sess
, ua_chan
, ua_event
, app
);
1438 /* XXX: Report error someday... */
1450 * For a specific UST session, create the channel for all registered apps.
1452 int ust_app_create_channel_glb(struct ltt_ust_session
*usess
,
1453 struct ltt_ust_channel
*uchan
)
1456 struct cds_lfht_iter iter
;
1457 struct ust_app
*app
;
1458 struct ust_app_session
*ua_sess
;
1459 struct ust_app_channel
*ua_chan
;
1461 if (usess
== NULL
|| uchan
== NULL
) {
1462 ERR("Adding UST global channel to NULL values");
1467 DBG2("UST app adding channel %s to global domain for session uid %d",
1468 uchan
->name
, usess
->uid
);
1472 /* For every registered applications */
1473 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1475 * Create session on the tracer side and add it to app session HT. Note
1476 * that if session exist, it will simply return a pointer to the ust
1479 ua_sess
= create_ust_app_session(usess
, app
);
1480 if (ua_sess
== NULL
) {
1484 /* Create channel onto application */
1485 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
1486 if (ua_chan
== NULL
) {
1498 * Enable event for a specific session and channel on the tracer.
1500 int ust_app_enable_event_glb(struct ltt_ust_session
*usess
,
1501 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1504 struct cds_lfht_iter iter
, uiter
;
1505 struct cds_lfht_node
*ua_chan_node
, *ua_event_node
;
1506 struct ust_app
*app
;
1507 struct ust_app_session
*ua_sess
;
1508 struct ust_app_channel
*ua_chan
;
1509 struct ust_app_event
*ua_event
;
1511 DBG("UST app enabling event %s for all apps for session uid %d",
1512 uevent
->attr
.name
, usess
->uid
);
1515 * NOTE: At this point, this function is called only if the session and
1516 * channel passed are already created for all apps. and enabled on the
1522 /* For all registered applications */
1523 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1524 ua_sess
= lookup_session_by_app(usess
, app
);
1525 /* If ua_sess is NULL, there is a code flow error */
1528 /* Lookup channel in the ust app session */
1529 ua_chan_node
= hashtable_lookup(ua_sess
->channels
, (void *)uchan
->name
,
1530 strlen(uchan
->name
), &uiter
);
1531 /* If the channel is not found, there is a code flow error */
1532 assert(ua_chan_node
);
1534 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1536 ua_event_node
= hashtable_lookup(ua_sess
->channels
,
1537 (void*)uevent
->attr
.name
, strlen(uevent
->attr
.name
), &uiter
);
1538 if (ua_event_node
== NULL
) {
1539 DBG3("UST app enable event %s not found. Skipping app",
1543 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
1545 ret
= enable_ust_app_event(ua_sess
, ua_event
, app
);
1547 /* XXX: Report error someday... */
1558 * For a specific existing UST session and UST channel, creates the event for
1559 * all registered apps.
1561 int ust_app_create_event_glb(struct ltt_ust_session
*usess
,
1562 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1565 struct cds_lfht_iter iter
, uiter
;
1566 struct cds_lfht_node
*ua_chan_node
;
1567 struct ust_app
*app
;
1568 struct ust_app_session
*ua_sess
;
1569 struct ust_app_channel
*ua_chan
;
1571 DBG("UST app creating event %s for all apps for session uid %d",
1572 uevent
->attr
.name
, usess
->uid
);
1575 * NOTE: At this point, this function is called only if the session and
1576 * channel passed are already created for all apps. and enabled on the
1582 /* For all registered applications */
1583 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1584 ua_sess
= lookup_session_by_app(usess
, app
);
1585 /* If ua_sess is NULL, there is a code flow error */
1588 /* Lookup channel in the ust app session */
1589 ua_chan_node
= hashtable_lookup(ua_sess
->channels
, (void *)uchan
->name
,
1590 strlen(uchan
->name
), &uiter
);
1591 /* If the channel is not found, there is a code flow error */
1592 assert(ua_chan_node
);
1594 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1596 ret
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
1608 * Start tracing for a specific UST session and app.
1610 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1613 struct cds_lfht_iter iter
;
1614 struct ust_app_session
*ua_sess
;
1615 struct ust_app_channel
*ua_chan
;
1616 struct ltt_ust_stream
*ustream
;
1619 DBG("Starting tracing for ust app pid %d", app
->key
.pid
);
1623 ua_sess
= lookup_session_by_app(usess
, app
);
1624 if (ua_sess
== NULL
) {
1625 goto error_rcu_unlock
;
1628 /* Upon restart, we skip the setup, already done */
1629 if (ua_sess
->started
) {
1633 ret
= create_ust_app_metadata(ua_sess
, usess
->pathname
, app
);
1635 goto error_rcu_unlock
;
1638 /* For each channel */
1639 cds_lfht_for_each_entry(ua_sess
->channels
, &iter
, ua_chan
, node
) {
1640 /* Create all streams */
1642 /* Create UST stream */
1643 ustream
= zmalloc(sizeof(*ustream
));
1644 if (ustream
== NULL
) {
1645 PERROR("zmalloc ust stream");
1646 goto error_rcu_unlock
;
1649 ret
= ustctl_create_stream(app
->key
.sock
, ua_chan
->obj
,
1652 /* Got all streams */
1655 ustream
->handle
= ustream
->obj
->handle
;
1657 /* Order is important */
1658 cds_list_add_tail(&ustream
->list
, &ua_chan
->streams
.head
);
1659 ret
= snprintf(ustream
->pathname
, PATH_MAX
, "%s/%s_%u",
1660 ua_sess
->path
, ua_chan
->name
,
1661 ua_chan
->streams
.count
++);
1663 PERROR("asprintf UST create stream");
1666 DBG2("UST stream %d ready at %s", ua_chan
->streams
.count
,
1671 switch (app
->bits_per_long
) {
1673 consumerd_fd
= ust_consumerd64_fd
;
1676 consumerd_fd
= ust_consumerd32_fd
;
1680 goto error_rcu_unlock
;
1683 /* Setup UST consumer socket and send fds to it */
1684 ret
= ust_consumer_send_session(consumerd_fd
, ua_sess
);
1686 goto error_rcu_unlock
;
1688 ua_sess
->started
= 1;
1691 /* This start the UST tracing */
1692 ret
= ustctl_start_session(app
->key
.sock
, ua_sess
->handle
);
1694 ERR("Error starting tracing for app pid: %d", app
->key
.pid
);
1695 goto error_rcu_unlock
;
1700 /* Quiescent wait after starting trace */
1701 ustctl_wait_quiescent(app
->key
.sock
);
1711 * Stop tracing for a specific UST session and app.
1713 int ust_app_stop_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1716 struct ust_app_session
*ua_sess
;
1718 DBG("Stopping tracing for ust app pid %d", app
->key
.pid
);
1722 ua_sess
= lookup_session_by_app(usess
, app
);
1723 if (ua_sess
== NULL
) {
1724 /* Only malloc can failed so something is really wrong */
1725 goto error_rcu_unlock
;
1728 #if 0 /* only useful when periodical flush will be supported */
1729 /* need to keep a handle on shm in session for this. */
1730 /* Flush all buffers before stopping */
1731 ret
= ustctl_flush_buffer(usess
->sock
, usess
->metadata
->obj
);
1733 ERR("UST metadata flush failed");
1736 cds_list_for_each_entry(ustchan
, &usess
->channels
.head
, list
) {
1737 ret
= ustctl_flush_buffer(usess
->sock
, ustchan
->obj
);
1739 ERR("UST flush buffer error");
1744 /* This inhibits UST tracing */
1745 ret
= ustctl_stop_session(app
->key
.sock
, ua_sess
->handle
);
1747 ERR("Error stopping tracing for app pid: %d", app
->key
.pid
);
1748 goto error_rcu_unlock
;
1753 /* Quiescent wait after stopping trace */
1754 ustctl_wait_quiescent(app
->key
.sock
);
1764 * Destroy a specific UST session in apps.
1766 int ust_app_destroy_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1768 struct ust_app_session
*ua_sess
;
1769 struct lttng_ust_object_data obj
;
1770 struct cds_lfht_iter iter
;
1771 struct cds_lfht_node
*node
;
1773 DBG("Destroy tracing for ust app pid %d", app
->key
.pid
);
1777 __lookup_session_by_app(usess
, app
, &iter
);
1778 node
= hashtable_iter_get_node(&iter
);
1780 /* Only malloc can failed so something is really wrong */
1781 goto error_rcu_unlock
;
1783 ua_sess
= caa_container_of(node
, struct ust_app_session
, node
);
1784 hashtable_del(app
->sessions
, &iter
);
1785 delete_ust_app_session(app
->key
.sock
, ua_sess
);
1786 obj
.handle
= ua_sess
->handle
;
1789 obj
.memory_map_size
= 0;
1790 ustctl_release_object(app
->key
.sock
, &obj
);
1794 /* Quiescent wait after stopping trace */
1795 ustctl_wait_quiescent(app
->key
.sock
);
1805 * Start tracing for the UST session.
1807 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
1810 struct cds_lfht_iter iter
;
1811 struct ust_app
*app
;
1813 DBG("Starting all UST traces");
1817 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1818 ret
= ust_app_start_trace(usess
, app
);
1820 /* Continue to next apps even on error */
1831 * Start tracing for the UST session.
1833 int ust_app_stop_trace_all(struct ltt_ust_session
*usess
)
1836 struct cds_lfht_iter iter
;
1837 struct ust_app
*app
;
1839 DBG("Stopping all UST traces");
1843 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1844 ret
= ust_app_stop_trace(usess
, app
);
1846 /* Continue to next apps even on error */
1857 * Destroy app UST session.
1859 int ust_app_destroy_trace_all(struct ltt_ust_session
*usess
)
1862 struct cds_lfht_iter iter
;
1863 struct ust_app
*app
;
1865 DBG("Destroy all UST traces");
1869 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1870 ret
= ust_app_destroy_trace(usess
, app
);
1872 /* Continue to next apps even on error */
1883 * Add channels/events from UST global domain to registered apps at sock.
1885 void ust_app_global_update(struct ltt_ust_session
*usess
, int sock
)
1888 struct cds_lfht_iter iter
;
1889 struct ust_app
*app
;
1890 struct ust_app_session
*ua_sess
;
1891 struct ust_app_channel
*ua_chan
;
1892 struct ust_app_event
*ua_event
;
1894 if (usess
== NULL
) {
1895 ERR("No UST session on global update. Returning");
1899 DBG2("UST app global update for app sock %d for session uid %d", sock
,
1904 app
= find_app_by_sock(sock
);
1906 ERR("Failed to update app sock %d", sock
);
1910 ua_sess
= create_ust_app_session(usess
, app
);
1911 if (ua_sess
== NULL
) {
1916 * We can iterate safely here over all UST app session sicne the create ust
1917 * app session above made a shadow copy of the UST global domain from the
1920 cds_lfht_for_each_entry(ua_sess
->channels
, &iter
, ua_chan
, node
) {
1921 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
1923 /* FIXME: Should we quit here or continue... */
1927 /* For each events */
1928 cds_lfht_for_each_entry(ua_chan
->events
, &iter
, ua_event
, node
) {
1929 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
1931 /* FIXME: Should we quit here or continue... */
1937 if (usess
->start_trace
) {
1938 ret
= ust_app_start_trace(usess
, app
);
1943 DBG2("UST trace started for app pid %d", app
->key
.pid
);