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 ua_chan
->enabled
= 0;
293 DBG2("UST app channel %s disabled successfully for app (pid: %d)",
294 ua_chan
->name
, app
->key
.pid
);
301 * Enable the specified channel on to UST tracer for the UST session.
303 static int enable_ust_channel(struct ust_app
*app
,
304 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
308 ret
= ustctl_enable(app
->key
.sock
, ua_chan
->obj
);
310 ERR("UST app channel %s enable failed for app (pid: %d) "
311 "and session handle %d with ret %d",
312 ua_chan
->name
, app
->key
.pid
, ua_sess
->handle
, ret
);
316 ua_chan
->enabled
= 1;
318 DBG2("UST app channel %s enabled successfully for app (pid: %d)",
319 ua_chan
->name
, app
->key
.pid
);
326 * Enable the specified event on to UST tracer for the UST session.
328 static int enable_ust_event(struct ust_app
*app
,
329 struct ust_app_session
*ua_sess
, struct ust_app_event
*ua_event
)
333 ret
= ustctl_enable(app
->key
.sock
, ua_event
->obj
);
335 ERR("UST app event %s enable failed for app (pid: %d) "
336 "and session handle %d with ret %d",
337 ua_event
->attr
.name
, app
->key
.pid
, ua_sess
->handle
, ret
);
341 DBG2("UST app event %s enabled successfully for app (pid: %d)",
342 ua_event
->attr
.name
, app
->key
.pid
);
349 * Open metadata onto the UST tracer for a UST session.
351 static int open_ust_metadata(struct ust_app
*app
,
352 struct ust_app_session
*ua_sess
)
355 struct lttng_ust_channel_attr uattr
;
357 uattr
.overwrite
= ua_sess
->metadata
->attr
.overwrite
;
358 uattr
.subbuf_size
= ua_sess
->metadata
->attr
.subbuf_size
;
359 uattr
.num_subbuf
= ua_sess
->metadata
->attr
.num_subbuf
;
360 uattr
.switch_timer_interval
=
361 ua_sess
->metadata
->attr
.switch_timer_interval
;
362 uattr
.read_timer_interval
=
363 ua_sess
->metadata
->attr
.read_timer_interval
;
364 uattr
.output
= ua_sess
->metadata
->attr
.output
;
366 /* UST tracer metadata creation */
367 ret
= ustctl_open_metadata(app
->key
.sock
, ua_sess
->handle
, &uattr
,
368 &ua_sess
->metadata
->obj
);
370 ERR("UST app open metadata failed for app pid:%d",
380 * Create stream onto the UST tracer for a UST session.
382 static int create_ust_stream(struct ust_app
*app
,
383 struct ust_app_session
*ua_sess
)
387 ret
= ustctl_create_stream(app
->key
.sock
, ua_sess
->metadata
->obj
,
388 &ua_sess
->metadata
->stream_obj
);
390 ERR("UST create metadata stream failed");
399 * Create the specified channel onto the UST tracer for a UST session.
401 static int create_ust_channel(struct ust_app
*app
,
402 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
406 /* TODO: remove cast and use lttng-ust-abi.h */
407 ret
= ustctl_create_channel(app
->key
.sock
, ua_sess
->handle
,
408 (struct lttng_ust_channel_attr
*)&ua_chan
->attr
, &ua_chan
->obj
);
410 DBG("Error creating channel %s for app (pid: %d, sock: %d) "
411 "and session handle %d with ret %d",
412 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
,
413 ua_sess
->handle
, ret
);
417 ua_chan
->handle
= ua_chan
->obj
->handle
;
418 ua_chan
->attr
.shm_fd
= ua_chan
->obj
->shm_fd
;
419 ua_chan
->attr
.wait_fd
= ua_chan
->obj
->wait_fd
;
420 ua_chan
->attr
.memory_map_size
= ua_chan
->obj
->memory_map_size
;
422 DBG2("UST app channel %s created successfully for pid:%d and sock:%d",
423 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
);
430 * Create the specified event onto the UST tracer for a UST session.
433 int create_ust_event(struct ust_app
*app
, struct ust_app_session
*ua_sess
,
434 struct ust_app_channel
*ua_chan
, struct ust_app_event
*ua_event
)
438 /* Create UST event on tracer */
439 ret
= ustctl_create_event(app
->key
.sock
, &ua_event
->attr
, ua_chan
->obj
,
442 ERR("Error ustctl create event %s for app pid: %d with ret %d",
443 ua_event
->attr
.name
, app
->key
.pid
, ret
);
447 ua_event
->handle
= ua_event
->obj
->handle
;
448 ua_event
->enabled
= 1;
450 DBG2("UST app event %s created successfully for pid:%d",
451 ua_event
->attr
.name
, app
->key
.pid
);
458 * Alloc new UST app session.
460 static struct ust_app_session
*alloc_ust_app_session(void)
462 struct ust_app_session
*ua_sess
;
464 /* Init most of the default value by allocating and zeroing */
465 ua_sess
= zmalloc(sizeof(struct ust_app_session
));
466 if (ua_sess
== NULL
) {
471 ua_sess
->handle
= -1;
472 ua_sess
->channels
= hashtable_new_str(0);
481 * Alloc new UST app channel.
483 static struct ust_app_channel
*alloc_ust_app_channel(char *name
,
484 struct lttng_ust_channel
*attr
)
486 struct ust_app_channel
*ua_chan
;
488 /* Init most of the default value by allocating and zeroing */
489 ua_chan
= zmalloc(sizeof(struct ust_app_channel
));
490 if (ua_chan
== NULL
) {
495 /* Setup channel name */
496 strncpy(ua_chan
->name
, name
, sizeof(ua_chan
->name
));
497 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
499 ua_chan
->handle
= -1;
500 ua_chan
->ctx
= hashtable_new(0);
501 ua_chan
->events
= hashtable_new_str(0);
502 hashtable_node_init(&ua_chan
->node
, (void *) ua_chan
->name
,
503 strlen(ua_chan
->name
));
505 CDS_INIT_LIST_HEAD(&ua_chan
->streams
.head
);
507 /* Copy attributes */
509 memcpy(&ua_chan
->attr
, attr
, sizeof(ua_chan
->attr
));
512 DBG3("UST app channel %s allocated", ua_chan
->name
);
521 * Alloc new UST app event.
523 static struct ust_app_event
*alloc_ust_app_event(char *name
,
524 struct lttng_ust_event
*attr
)
526 struct ust_app_event
*ua_event
;
528 /* Init most of the default value by allocating and zeroing */
529 ua_event
= zmalloc(sizeof(struct ust_app_event
));
530 if (ua_event
== NULL
) {
535 strncpy(ua_event
->name
, name
, sizeof(ua_event
->name
));
536 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
537 ua_event
->ctx
= hashtable_new(0);
538 hashtable_node_init(&ua_event
->node
, (void *) ua_event
->name
,
539 strlen(ua_event
->name
));
541 /* Copy attributes */
543 memcpy(&ua_event
->attr
, attr
, sizeof(ua_event
->attr
));
546 DBG3("UST app event %s allocated", ua_event
->name
);
555 * Copy data between an UST app event and a LTT event.
557 static void shadow_copy_event(struct ust_app_event
*ua_event
,
558 struct ltt_ust_event
*uevent
)
560 strncpy(ua_event
->name
, uevent
->attr
.name
, sizeof(ua_event
->name
));
561 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
563 /* Copy event attributes */
564 memcpy(&ua_event
->attr
, &uevent
->attr
, sizeof(ua_event
->attr
));
566 /* TODO: support copy context */
570 * Copy data between an UST app channel and a LTT channel.
572 static void shadow_copy_channel(struct ust_app_channel
*ua_chan
,
573 struct ltt_ust_channel
*uchan
)
575 struct cds_lfht_iter iter
;
576 struct cds_lfht_node
*ua_event_node
;
577 struct ltt_ust_event
*uevent
;
578 struct ust_app_event
*ua_event
;
580 DBG2("Shadow copy of UST app channel %s", ua_chan
->name
);
582 strncpy(ua_chan
->name
, uchan
->name
, sizeof(ua_chan
->name
));
583 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
584 /* Copy event attributes */
585 memcpy(&ua_chan
->attr
, &uchan
->attr
, sizeof(ua_chan
->attr
));
587 /* TODO: support copy context */
589 /* Copy all events from ltt ust channel to ust app channel */
590 cds_lfht_for_each_entry(uchan
->events
, &iter
, uevent
, node
) {
591 struct cds_lfht_iter uiter
;
593 ua_event_node
= hashtable_lookup(ua_chan
->events
,
594 (void *) uevent
->attr
.name
, strlen(uevent
->attr
.name
),
596 if (ua_event_node
== NULL
) {
597 DBG2("UST event %s not found on shadow copy channel",
599 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
600 if (ua_event
== NULL
) {
603 shadow_copy_event(ua_event
, uevent
);
604 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
608 DBG3("Shadow copy channel done");
612 * Copy data between a UST app session and a regular LTT session.
614 static void shadow_copy_session(struct ust_app_session
*ua_sess
,
615 struct ltt_ust_session
*usess
,
618 struct cds_lfht_node
*ua_chan_node
;
619 struct cds_lfht_iter iter
;
620 struct ltt_ust_channel
*uchan
;
621 struct ust_app_channel
*ua_chan
;
627 /* Get date and time for unique app path */
629 timeinfo
= localtime(&rawtime
);
630 strftime(datetime
, sizeof(datetime
), "%Y%m%d-%H%M%S", timeinfo
);
632 DBG2("Shadow copy of session handle %d", ua_sess
->handle
);
634 ua_sess
->uid
= usess
->uid
;
636 ret
= snprintf(ua_sess
->path
, PATH_MAX
,
638 usess
->pathname
, app
->name
, app
->key
.pid
,
641 PERROR("asprintf UST shadow copy session");
642 /* TODO: We cannot return an error from here.. */
646 /* TODO: support all UST domain */
648 /* Iterate over all channels in global domain. */
649 cds_lfht_for_each_entry(usess
->domain_global
.channels
, &iter
,
651 struct cds_lfht_iter uiter
;
653 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
654 (void *)uchan
->name
, strlen(uchan
->name
),
656 if (ua_chan_node
!= NULL
) {
660 DBG2("Channel %s not found on shadow session copy, creating it",
662 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
663 if (ua_chan
== NULL
) {
664 /* malloc failed... continuing */
668 shadow_copy_channel(ua_chan
, uchan
);
669 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
674 * Lookup sesison wrapper.
677 void __lookup_session_by_app(struct ltt_ust_session
*usess
,
678 struct ust_app
*app
, struct cds_lfht_iter
*iter
)
680 /* Get right UST app session from app */
681 (void) hashtable_lookup(app
->sessions
,
682 (void *) ((unsigned long) usess
->uid
), sizeof(void *),
687 * Return ust app session from the app session hashtable using the UST session
690 static struct ust_app_session
*lookup_session_by_app(
691 struct ltt_ust_session
*usess
, struct ust_app
*app
)
693 struct cds_lfht_iter iter
;
694 struct cds_lfht_node
*node
;
696 __lookup_session_by_app(usess
, app
, &iter
);
697 node
= hashtable_iter_get_node(&iter
);
702 return caa_container_of(node
, struct ust_app_session
, node
);
709 * Create a UST session onto the tracer of app and add it the session
712 * Return ust app session or NULL on error.
714 static struct ust_app_session
*create_ust_app_session(
715 struct ltt_ust_session
*usess
, struct ust_app
*app
)
718 struct ust_app_session
*ua_sess
;
720 ua_sess
= lookup_session_by_app(usess
, app
);
721 if (ua_sess
== NULL
) {
722 DBG2("UST app pid: %d session uid %d not found, creating it",
723 app
->key
.pid
, usess
->uid
);
724 ua_sess
= alloc_ust_app_session();
725 if (ua_sess
== NULL
) {
726 /* Only malloc can failed so something is really wrong */
729 shadow_copy_session(ua_sess
, usess
, app
);
732 if (ua_sess
->handle
== -1) {
733 ret
= ustctl_create_session(app
->key
.sock
);
735 ERR("Error creating session for app pid %d, sock %d",
736 app
->key
.pid
, app
->key
.sock
);
737 /* TODO: free() ua_sess */
741 DBG2("UST app ustctl create session handle %d", ret
);
742 ua_sess
->handle
= ret
;
744 /* Add ust app session to app's HT */
745 hashtable_node_init(&ua_sess
->node
,
746 (void *)((unsigned long) ua_sess
->uid
), sizeof(void *));
747 hashtable_add_unique(app
->sessions
, &ua_sess
->node
);
749 DBG2("UST app session created successfully with handle %d", ret
);
759 * Enable on the tracer side a ust app event for the session and channel.
762 int enable_ust_app_event(struct ust_app_session
*ua_sess
,
763 struct ust_app_channel
*ua_chan
, struct ust_app_event
*ua_event
,
768 ret
= enable_ust_event(app
, ua_sess
, ua_event
);
773 ua_event
->enabled
= 1;
780 * Disable on the tracer side a ust app event for the session and channel.
782 static int disable_ust_app_event(struct ust_app_session
*ua_sess
,
783 struct ust_app_channel
*ua_chan
, struct ust_app_event
*ua_event
,
788 ret
= disable_ust_event(app
, ua_sess
, ua_event
);
793 ua_event
->enabled
= 0;
800 * Lookup ust app channel for session and disable it on the tracer side.
802 static int disable_ust_app_channel(struct ust_app_session
*ua_sess
,
803 struct ltt_ust_channel
*uchan
, struct ust_app
*app
)
806 struct cds_lfht_iter iter
;
807 struct cds_lfht_node
*ua_chan_node
;
808 struct ust_app_channel
*ua_chan
;
810 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
811 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
812 if (ua_chan_node
== NULL
) {
813 DBG2("Unable to find channel %s in ust session uid %u",
814 uchan
->name
, ua_sess
->uid
);
818 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
820 ret
= disable_ust_channel(app
, ua_sess
, ua_chan
);
830 * Lookup ust app channel for session and enable it on the tracer side.
832 static int enable_ust_app_channel(struct ust_app_session
*ua_sess
,
833 struct ltt_ust_channel
*uchan
, struct ust_app
*app
)
836 struct cds_lfht_iter iter
;
837 struct cds_lfht_node
*ua_chan_node
;
838 struct ust_app_channel
*ua_chan
;
840 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
841 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
842 if (ua_chan_node
== NULL
) {
843 DBG2("Unable to find channel %s in ust session uid %u",
844 uchan
->name
, ua_sess
->uid
);
848 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
850 ret
= enable_ust_channel(app
, ua_sess
, ua_chan
);
860 * Create UST app channel and create it on the tracer.
862 static struct ust_app_channel
*create_ust_app_channel(
863 struct ust_app_session
*ua_sess
, struct ltt_ust_channel
*uchan
,
867 struct cds_lfht_iter iter
;
868 struct cds_lfht_node
*ua_chan_node
;
869 struct ust_app_channel
*ua_chan
;
871 /* Lookup channel in the ust app session */
872 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
873 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
874 if (ua_chan_node
== NULL
) {
875 DBG2("Unable to find channel %s in ust session uid %u",
876 uchan
->name
, ua_sess
->uid
);
877 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
878 if (ua_chan
== NULL
) {
881 shadow_copy_channel(ua_chan
, uchan
);
883 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
885 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
888 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
900 * Create UST app event and create it on the tracer side.
903 int create_ust_app_event(struct ust_app_session
*ua_sess
,
904 struct ust_app_channel
*ua_chan
, struct ltt_ust_event
*uevent
,
908 struct cds_lfht_iter iter
;
909 struct cds_lfht_node
*ua_event_node
;
910 struct ust_app_event
*ua_event
;
913 ua_event_node
= hashtable_lookup(ua_chan
->events
,
914 (void *)uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
915 if (ua_event_node
!= NULL
) {
916 ERR("UST app event %s already exist. Stopping creation.",
921 /* Does not exist so create one */
922 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
923 if (ua_event
== NULL
) {
924 /* Only malloc can failed so something is really wrong */
928 shadow_copy_event(ua_event
, uevent
);
930 /* Create it on the tracer side */
931 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
933 delete_ust_app_event(app
->key
.sock
, ua_event
);
937 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
945 * Create UST metadata and open it on the tracer side.
947 static int create_ust_app_metadata(struct ust_app_session
*ua_sess
,
948 char *pathname
, struct ust_app
*app
)
952 if (ua_sess
->metadata
== NULL
) {
953 /* Allocate UST metadata */
954 ua_sess
->metadata
= trace_ust_create_metadata(pathname
);
955 if (ua_sess
->metadata
== NULL
) {
956 ERR("UST app session %d creating metadata failed",
961 ret
= open_ust_metadata(app
, ua_sess
);
966 DBG2("UST metadata opened for app pid %d", app
->key
.pid
);
969 /* Open UST metadata stream */
970 if (ua_sess
->metadata
->stream_obj
== NULL
) {
971 ret
= create_ust_stream(app
, ua_sess
);
976 ret
= mkdir(ua_sess
->path
, S_IRWXU
| S_IRWXG
);
978 PERROR("mkdir UST metadata");
982 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
,
983 "%s/metadata", ua_sess
->path
);
985 PERROR("asprintf UST create stream");
989 DBG2("UST metadata stream object created for app pid %d",
992 ERR("Attempting to create stream without metadata opened");
1003 * Return pointer to traceable apps list.
1005 struct cds_lfht
*ust_app_get_ht(void)
1011 * Return ust app pointer or NULL if not found.
1013 struct ust_app
*ust_app_find_by_pid(pid_t pid
)
1015 struct cds_lfht_node
*node
;
1016 struct cds_lfht_iter iter
;
1019 node
= hashtable_lookup(ust_app_ht
,
1020 (void *)((unsigned long) pid
), sizeof(void *), &iter
);
1022 DBG2("UST app no found with pid %d", pid
);
1027 DBG2("Found UST app by pid %d", pid
);
1029 return caa_container_of(node
, struct ust_app
, node
);
1037 * Using pid and uid (of the app), allocate a new ust_app struct and
1038 * add it to the global traceable app list.
1040 * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app
1041 * bitness is not supported.
1043 int ust_app_register(struct ust_register_msg
*msg
, int sock
)
1045 struct ust_app
*lta
;
1047 if ((msg
->bits_per_long
== 64 && ust_consumerd64_fd
== -EINVAL
)
1048 || (msg
->bits_per_long
== 32 && ust_consumerd32_fd
== -EINVAL
)) {
1049 ERR("Registration failed: application \"%s\" (pid: %d) has "
1050 "%d-bit long, but no consumerd for this long size is available.\n",
1051 msg
->name
, msg
->pid
, msg
->bits_per_long
);
1055 lta
= zmalloc(sizeof(struct ust_app
));
1061 lta
->ppid
= msg
->ppid
;
1062 lta
->uid
= msg
->uid
;
1063 lta
->gid
= msg
->gid
;
1064 lta
->bits_per_long
= msg
->bits_per_long
;
1065 lta
->v_major
= msg
->major
;
1066 lta
->v_minor
= msg
->minor
;
1067 strncpy(lta
->name
, msg
->name
, sizeof(lta
->name
));
1068 lta
->name
[16] = '\0';
1069 lta
->sessions
= hashtable_new(0);
1072 lta
->key
.pid
= msg
->pid
;
1073 hashtable_node_init(<a
->node
, (void *)((unsigned long)lta
->key
.pid
),
1075 lta
->key
.sock
= sock
;
1076 hashtable_node_init(<a
->key
.node
, (void *)((unsigned long)lta
->key
.sock
),
1080 hashtable_add_unique(ust_app_sock_key_map
, <a
->key
.node
);
1081 hashtable_add_unique(ust_app_ht
, <a
->node
);
1084 DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s"
1085 " (version %d.%d)", lta
->key
.pid
, lta
->ppid
, lta
->uid
, lta
->gid
,
1086 lta
->key
.sock
, lta
->name
, lta
->v_major
, lta
->v_minor
);
1092 * Unregister app by removing it from the global traceable app list and freeing
1095 * The socket is already closed at this point so no close to sock.
1097 void ust_app_unregister(int sock
)
1099 struct ust_app
*lta
;
1100 struct cds_lfht_node
*node
;
1101 struct cds_lfht_iter iter
;
1104 lta
= find_app_by_sock(sock
);
1106 ERR("Unregister app sock %d not found!", sock
);
1110 DBG("PID %d unregistering with sock %d", lta
->key
.pid
, sock
);
1112 /* Get the node reference for a call_rcu */
1113 node
= hashtable_lookup(ust_app_ht
,
1114 (void *)((unsigned long) lta
->key
.pid
), sizeof(void *), &iter
);
1116 ERR("Unable to find app sock %d by pid %d", sock
, lta
->key
.pid
);
1120 hashtable_del(ust_app_ht
, &iter
);
1121 call_rcu(&node
->head
, delete_ust_app_rcu
);
1128 * Return traceable_app_count
1130 unsigned long ust_app_list_count(void)
1132 unsigned long count
;
1135 count
= hashtable_get_count(ust_app_ht
);
1142 * Fill events array with all events name of all registered apps.
1144 int ust_app_list_events(struct lttng_event
**events
)
1147 size_t nbmem
, count
= 0;
1148 struct cds_lfht_iter iter
;
1149 struct ust_app
*app
;
1150 struct lttng_event
*tmp
;
1152 nbmem
= UST_APP_EVENT_LIST_SIZE
;
1153 tmp
= zmalloc(nbmem
* sizeof(struct lttng_event
));
1155 PERROR("zmalloc ust app events");
1162 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1163 handle
= ustctl_tracepoint_list(app
->key
.sock
);
1165 ERR("UST app list events getting handle failed for app pid %d",
1170 while ((ret
= ustctl_tracepoint_list_get(app
->key
.sock
, handle
,
1171 tmp
[count
].name
)) != -ENOENT
) {
1172 if (count
> nbmem
) {
1173 DBG2("Reallocating event list from %zu to %zu bytes", nbmem
,
1174 nbmem
+ UST_APP_EVENT_LIST_SIZE
);
1175 nbmem
+= UST_APP_EVENT_LIST_SIZE
;
1176 tmp
= realloc(tmp
, nbmem
);
1178 PERROR("realloc ust app events");
1184 tmp
[count
].type
= LTTNG_UST_TRACEPOINT
;
1185 tmp
[count
].pid
= app
->key
.pid
;
1186 tmp
[count
].enabled
= -1;
1194 DBG2("UST app list events done (%zu events)", count
);
1203 * Free and clean all traceable apps of the global list.
1205 void ust_app_clean_list(void)
1208 struct cds_lfht_node
*node
;
1209 struct cds_lfht_iter iter
;
1210 struct ust_app
*app
;
1212 DBG2("UST app cleaning registered apps hash table");
1216 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1217 ret
= hashtable_del(ust_app_ht
, &iter
);
1219 call_rcu(&node
->head
, delete_ust_app_rcu
);
1223 hashtable_destroy(ust_app_ht
);
1224 hashtable_destroy(ust_app_sock_key_map
);
1230 * Init UST app hash table.
1232 void ust_app_ht_alloc(void)
1234 ust_app_ht
= hashtable_new(0);
1235 ust_app_sock_key_map
= hashtable_new(0);
1239 * For a specific UST session, disable the channel for all registered apps.
1241 int ust_app_disable_channel_all(struct ltt_ust_session
*usess
,
1242 struct ltt_ust_channel
*uchan
)
1245 struct cds_lfht_iter iter
;
1246 struct ust_app
*app
;
1247 struct ust_app_session
*ua_sess
;
1249 if (usess
== NULL
|| uchan
== NULL
) {
1250 ERR("Disabling UST global channel with NULL values");
1255 DBG2("UST app disablling channel %s from global domain for session uid %d",
1256 uchan
->name
, usess
->uid
);
1260 /* For every registered applications */
1261 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1262 ua_sess
= lookup_session_by_app(usess
, app
);
1263 if (ua_sess
== NULL
) {
1267 /* Create channel onto application */
1268 ret
= disable_ust_app_channel(ua_sess
, uchan
, app
);
1270 /* XXX: We might want to report this error at some point... */
1282 * For a specific UST session, enable the channel for all registered apps.
1284 int ust_app_enable_channel_all(struct ltt_ust_session
*usess
,
1285 struct ltt_ust_channel
*uchan
)
1288 struct cds_lfht_iter iter
;
1289 struct ust_app
*app
;
1290 struct ust_app_session
*ua_sess
;
1292 if (usess
== NULL
|| uchan
== NULL
) {
1293 ERR("Adding UST global channel to NULL values");
1298 DBG2("UST app enabling channel %s to global domain for session uid %d",
1299 uchan
->name
, usess
->uid
);
1303 /* For every registered applications */
1304 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1305 ua_sess
= lookup_session_by_app(usess
, app
);
1306 if (ua_sess
== NULL
) {
1310 /* Enable channel onto application */
1311 ret
= enable_ust_app_channel(ua_sess
, uchan
, app
);
1313 /* XXX: We might want to report this error at some point... */
1325 * Disable an event in a channel and for a specific session.
1327 int ust_app_disable_event(struct ltt_ust_session
*usess
,
1328 struct ltt_ust_channel
*uchan
, char *event_name
)
1331 struct cds_lfht_iter iter
, uiter
;
1332 struct cds_lfht_node
*ua_chan_node
, *ua_event_node
;
1333 struct ust_app
*app
;
1334 struct ust_app_session
*ua_sess
;
1335 struct ust_app_channel
*ua_chan
;
1336 struct ust_app_event
*ua_event
;
1338 DBG("UST app disabling event %s for all apps in channel "
1339 "%s for session uid %d", event_name
, uchan
->name
, usess
->uid
);
1343 /* For all registered applications */
1344 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1345 ua_sess
= lookup_session_by_app(usess
, app
);
1346 if (ua_sess
== NULL
) {
1351 /* Lookup channel in the ust app session */
1352 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
1353 (void *)uchan
->name
, strlen(uchan
->name
), &uiter
);
1354 if (ua_chan_node
== NULL
) {
1355 DBG2("Channel %s not found in session uid %d for app pid %d."
1356 "Skipping", uchan
->name
, usess
->uid
, app
->key
.pid
);
1359 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1361 ua_event_node
= hashtable_lookup(ua_chan
->events
,
1362 (void *) event_name
, strlen(event_name
), &uiter
);
1363 if (ua_event_node
== NULL
) {
1364 DBG2("Event %s not found in channel %s for app pid %d."
1365 "Skipping", event_name
, uchan
->name
, app
->key
.pid
);
1368 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
1370 ret
= disable_ust_app_event(ua_sess
, ua_chan
, ua_event
, app
);
1372 /* XXX: Report error someday... */
1383 * For a specific UST session and UST channel, the event for all
1386 int ust_app_disable_event_all(struct ltt_ust_session
*usess
,
1387 struct ltt_ust_channel
*uchan
)
1390 struct cds_lfht_iter iter
, uiter
;
1391 struct cds_lfht_node
*ua_chan_node
;
1392 struct ust_app
*app
;
1393 struct ust_app_session
*ua_sess
;
1394 struct ust_app_channel
*ua_chan
;
1395 struct ust_app_event
*ua_event
;
1397 DBG("UST app disabling all event for all apps in channel "
1398 "%s for session uid %d", uchan
->name
, usess
->uid
);
1402 /* For all registered applications */
1403 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1404 ua_sess
= lookup_session_by_app(usess
, app
);
1405 /* If ua_sess is NULL, there is a code flow error */
1408 /* Lookup channel in the ust app session */
1409 ua_chan_node
= hashtable_lookup(ua_sess
->channels
, (void *)uchan
->name
,
1410 strlen(uchan
->name
), &uiter
);
1411 /* If the channel is not found, there is a code flow error */
1412 assert(ua_chan_node
);
1414 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1416 /* Disable each events of channel */
1417 cds_lfht_for_each_entry(ua_chan
->events
, &uiter
, ua_event
, node
) {
1418 ret
= disable_ust_app_event(ua_sess
, ua_chan
, ua_event
, app
);
1420 /* XXX: Report error someday... */
1432 * For a specific UST session, create the channel for all registered apps.
1434 int ust_app_create_channel_all(struct ltt_ust_session
*usess
,
1435 struct ltt_ust_channel
*uchan
)
1438 struct cds_lfht_iter iter
;
1439 struct ust_app
*app
;
1440 struct ust_app_session
*ua_sess
;
1441 struct ust_app_channel
*ua_chan
;
1443 if (usess
== NULL
|| uchan
== NULL
) {
1444 ERR("Adding UST global channel to NULL values");
1449 DBG2("UST app adding channel %s to global domain for session uid %d",
1450 uchan
->name
, usess
->uid
);
1454 /* For every registered applications */
1455 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1457 * Create session on the tracer side and add it to app session HT. Note
1458 * that if session exist, it will simply return a pointer to the ust
1461 ua_sess
= create_ust_app_session(usess
, app
);
1462 if (ua_sess
== NULL
) {
1466 /* Create channel onto application */
1467 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
1468 if (ua_chan
== NULL
) {
1480 * Enable event for a specific session and channel on the tracer.
1482 int ust_app_enable_event_all(struct ltt_ust_session
*usess
,
1483 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1486 struct cds_lfht_iter iter
, uiter
;
1487 struct cds_lfht_node
*ua_chan_node
;
1488 struct ust_app
*app
;
1489 struct ust_app_session
*ua_sess
;
1490 struct ust_app_channel
*ua_chan
;
1491 struct ust_app_event
*ua_event
;
1493 DBG("UST app enabling event %s for all apps for session uid %d",
1494 uevent
->attr
.name
, usess
->uid
);
1497 * NOTE: At this point, this function is called only if the session and
1498 * channel passed are already created for all apps. and enabled on the
1504 /* For all registered applications */
1505 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1506 ua_sess
= lookup_session_by_app(usess
, app
);
1507 /* If ua_sess is NULL, there is a code flow error */
1510 /* Lookup channel in the ust app session */
1511 ua_chan_node
= hashtable_lookup(ua_sess
->channels
, (void *)uchan
->name
,
1512 strlen(uchan
->name
), &uiter
);
1513 /* If the channel is not found, there is a code flow error */
1514 assert(ua_chan_node
);
1516 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1518 /* Enable each events of channel */
1519 cds_lfht_for_each_entry(ua_chan
->events
, &uiter
, ua_event
, node
) {
1520 ret
= enable_ust_app_event(ua_sess
, ua_chan
, ua_event
, app
);
1522 /* XXX: Report error someday... */
1534 * For a specific existing UST session and UST channel, creates the event for
1535 * all registered apps.
1537 int ust_app_create_event_all(struct ltt_ust_session
*usess
,
1538 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1541 struct cds_lfht_iter iter
, uiter
;
1542 struct cds_lfht_node
*ua_chan_node
;
1543 struct ust_app
*app
;
1544 struct ust_app_session
*ua_sess
;
1545 struct ust_app_channel
*ua_chan
;
1547 DBG("UST app creating event %s for all apps for session uid %d",
1548 uevent
->attr
.name
, usess
->uid
);
1551 * NOTE: At this point, this function is called only if the session and
1552 * channel passed are already created for all apps. and enabled on the
1558 /* For all registered applications */
1559 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1560 ua_sess
= lookup_session_by_app(usess
, app
);
1561 /* If ua_sess is NULL, there is a code flow error */
1564 /* Lookup channel in the ust app session */
1565 ua_chan_node
= hashtable_lookup(ua_sess
->channels
, (void *)uchan
->name
,
1566 strlen(uchan
->name
), &uiter
);
1567 /* If the channel is not found, there is a code flow error */
1568 assert(ua_chan_node
);
1570 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1572 ret
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
1584 * Start tracing for a specific UST session and app.
1586 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1589 struct cds_lfht_iter iter
;
1590 struct ust_app_session
*ua_sess
;
1591 struct ust_app_channel
*ua_chan
;
1592 struct ltt_ust_stream
*ustream
;
1595 DBG("Starting tracing for ust app pid %d", app
->key
.pid
);
1599 ua_sess
= lookup_session_by_app(usess
, app
);
1600 if (ua_sess
== NULL
) {
1601 goto error_rcu_unlock
;
1604 /* Upon restart, we skip the setup, already done */
1605 if (ua_sess
->started
) {
1609 ret
= create_ust_app_metadata(ua_sess
, usess
->pathname
, app
);
1611 goto error_rcu_unlock
;
1614 /* For each channel */
1615 cds_lfht_for_each_entry(ua_sess
->channels
, &iter
, ua_chan
, node
) {
1616 /* Create all streams */
1618 /* Create UST stream */
1619 ustream
= zmalloc(sizeof(*ustream
));
1620 if (ustream
== NULL
) {
1621 PERROR("zmalloc ust stream");
1622 goto error_rcu_unlock
;
1625 ret
= ustctl_create_stream(app
->key
.sock
, ua_chan
->obj
,
1628 /* Got all streams */
1631 ustream
->handle
= ustream
->obj
->handle
;
1633 /* Order is important */
1634 cds_list_add_tail(&ustream
->list
, &ua_chan
->streams
.head
);
1635 ret
= snprintf(ustream
->pathname
, PATH_MAX
, "%s/%s_%u",
1636 ua_sess
->path
, ua_chan
->name
,
1637 ua_chan
->streams
.count
++);
1639 PERROR("asprintf UST create stream");
1642 DBG2("UST stream %d ready at %s", ua_chan
->streams
.count
,
1647 switch (app
->bits_per_long
) {
1649 consumerd_fd
= ust_consumerd64_fd
;
1652 consumerd_fd
= ust_consumerd32_fd
;
1656 goto error_rcu_unlock
;
1659 /* Setup UST consumer socket and send fds to it */
1660 ret
= ust_consumer_send_session(consumerd_fd
, ua_sess
);
1662 goto error_rcu_unlock
;
1664 ua_sess
->started
= 1;
1667 /* This start the UST tracing */
1668 ret
= ustctl_start_session(app
->key
.sock
, ua_sess
->handle
);
1670 ERR("Error starting tracing for app pid: %d", app
->key
.pid
);
1671 goto error_rcu_unlock
;
1676 /* Quiescent wait after starting trace */
1677 ustctl_wait_quiescent(app
->key
.sock
);
1687 * Stop tracing for a specific UST session and app.
1689 int ust_app_stop_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1692 struct ust_app_session
*ua_sess
;
1694 DBG("Stopping tracing for ust app pid %d", app
->key
.pid
);
1698 ua_sess
= lookup_session_by_app(usess
, app
);
1699 if (ua_sess
== NULL
) {
1700 /* Only malloc can failed so something is really wrong */
1701 goto error_rcu_unlock
;
1704 #if 0 /* only useful when periodical flush will be supported */
1705 /* need to keep a handle on shm in session for this. */
1706 /* Flush all buffers before stopping */
1707 ret
= ustctl_flush_buffer(usess
->sock
, usess
->metadata
->obj
);
1709 ERR("UST metadata flush failed");
1712 cds_list_for_each_entry(ustchan
, &usess
->channels
.head
, list
) {
1713 ret
= ustctl_flush_buffer(usess
->sock
, ustchan
->obj
);
1715 ERR("UST flush buffer error");
1720 /* This inhibits UST tracing */
1721 ret
= ustctl_stop_session(app
->key
.sock
, ua_sess
->handle
);
1723 ERR("Error stopping tracing for app pid: %d", app
->key
.pid
);
1724 goto error_rcu_unlock
;
1729 /* Quiescent wait after stopping trace */
1730 ustctl_wait_quiescent(app
->key
.sock
);
1740 * Destroy a specific UST session in apps.
1742 int ust_app_destroy_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1744 struct ust_app_session
*ua_sess
;
1745 struct lttng_ust_object_data obj
;
1746 struct cds_lfht_iter iter
;
1747 struct cds_lfht_node
*node
;
1749 DBG("Destroy tracing for ust app pid %d", app
->key
.pid
);
1753 __lookup_session_by_app(usess
, app
, &iter
);
1754 node
= hashtable_iter_get_node(&iter
);
1756 /* Only malloc can failed so something is really wrong */
1757 goto error_rcu_unlock
;
1759 ua_sess
= caa_container_of(node
, struct ust_app_session
, node
);
1760 hashtable_del(app
->sessions
, &iter
);
1761 delete_ust_app_session(app
->key
.sock
, ua_sess
);
1762 obj
.handle
= ua_sess
->handle
;
1765 obj
.memory_map_size
= 0;
1766 ustctl_release_object(app
->key
.sock
, &obj
);
1770 /* Quiescent wait after stopping trace */
1771 ustctl_wait_quiescent(app
->key
.sock
);
1781 * Start tracing for the UST session.
1783 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
1786 struct cds_lfht_iter iter
;
1787 struct ust_app
*app
;
1789 DBG("Starting all UST traces");
1793 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1794 ret
= ust_app_start_trace(usess
, app
);
1796 /* Continue to next apps even on error */
1807 * Start tracing for the UST session.
1809 int ust_app_stop_trace_all(struct ltt_ust_session
*usess
)
1812 struct cds_lfht_iter iter
;
1813 struct ust_app
*app
;
1815 DBG("Stopping all UST traces");
1819 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1820 ret
= ust_app_stop_trace(usess
, app
);
1822 /* Continue to next apps even on error */
1833 * Destroy app UST session.
1835 int ust_app_destroy_trace_all(struct ltt_ust_session
*usess
)
1838 struct cds_lfht_iter iter
;
1839 struct ust_app
*app
;
1841 DBG("Destroy all UST traces");
1845 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
1846 ret
= ust_app_destroy_trace(usess
, app
);
1848 /* Continue to next apps even on error */
1859 * Add channels/events from UST global domain to registered apps at sock.
1861 void ust_app_global_update(struct ltt_ust_session
*usess
, int sock
)
1864 struct cds_lfht_iter iter
;
1865 struct ust_app
*app
;
1866 struct ust_app_session
*ua_sess
;
1867 struct ust_app_channel
*ua_chan
;
1868 struct ust_app_event
*ua_event
;
1870 if (usess
== NULL
) {
1871 ERR("No UST session on global update. Returning");
1875 DBG2("UST app global update for app sock %d for session uid %d", sock
,
1880 app
= find_app_by_sock(sock
);
1882 ERR("Failed to update app sock %d", sock
);
1886 ua_sess
= create_ust_app_session(usess
, app
);
1887 if (ua_sess
== NULL
) {
1892 * We can iterate safely here over all UST app session sicne the create ust
1893 * app session above made a shadow copy of the UST global domain from the
1896 cds_lfht_for_each_entry(ua_sess
->channels
, &iter
, ua_chan
, node
) {
1897 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
1899 /* FIXME: Should we quit here or continue... */
1903 /* For each events */
1904 cds_lfht_for_each_entry(ua_chan
->events
, &iter
, ua_event
, node
) {
1905 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
1907 /* FIXME: Should we quit here or continue... */
1913 if (usess
->start_trace
) {
1914 ret
= ust_app_start_trace(usess
, app
);
1919 DBG2("UST trace started for app pid %d", app
->key
.pid
);