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>
30 #include <lttng-share.h>
32 #include "hashtable.h"
34 #include "../hashtable/hash.h"
36 #include "ust-consumer.h"
39 * Delete a traceable application structure from the global list.
41 static void delete_ust_app(struct ust_app
*lta
)
44 struct cds_lfht_node
*node
;
45 struct cds_lfht_iter iter
;
49 /* TODO: clean session hashtable */
53 /* Remove from apps hash table */
54 node
= hashtable_lookup(ust_app_ht
,
55 (void *) ((unsigned long) lta
->key
.pid
), sizeof(void *), &iter
);
57 ERR("UST app pid %d not found in hash table", lta
->key
.pid
);
59 ret
= hashtable_del(ust_app_ht
, &iter
);
61 ERR("UST app unable to delete app %d from hash table",
64 DBG2("UST app pid %d deleted", lta
->key
.pid
);
68 /* Remove from key hash table */
69 node
= hashtable_lookup(ust_app_sock_key_map
,
70 (void *) ((unsigned long) lta
->key
.sock
), sizeof(void *), &iter
);
72 ERR("UST app key %d not found in key hash table", lta
->key
.sock
);
74 ret
= hashtable_del(ust_app_sock_key_map
, &iter
);
76 ERR("UST app unable to delete app sock %d from key hash table",
79 DBG2("UST app pair sock %d key %d deleted",
80 lta
->key
.sock
, lta
->key
.pid
);
90 * URCU intermediate call to delete an UST app.
92 static void delete_ust_app_rcu(struct rcu_head
*head
)
94 struct cds_lfht_node
*node
=
95 caa_container_of(head
, struct cds_lfht_node
, head
);
97 caa_container_of(node
, struct ust_app
, node
);
103 * Find an ust_app using the sock and return it. RCU read side lock must be
104 * held before calling this helper function.
106 static struct ust_app
*find_app_by_sock(int sock
)
108 struct cds_lfht_node
*node
;
109 struct ust_app_key
*key
;
110 struct cds_lfht_iter iter
;
112 node
= hashtable_lookup(ust_app_sock_key_map
,
113 (void *)((unsigned long) sock
), sizeof(void *), &iter
);
115 DBG2("UST app find by sock %d key not found", sock
);
120 key
= caa_container_of(node
, struct ust_app_key
, node
);
122 node
= hashtable_lookup(ust_app_ht
,
123 (void *)((unsigned long) key
->pid
), sizeof(void *), &iter
);
125 DBG2("UST app find by sock %d not found", sock
);
130 return caa_container_of(node
, struct ust_app
, node
);
137 * Return pointer to traceable apps list.
139 struct cds_lfht
*ust_app_get_ht(void)
145 * Return ust app pointer or NULL if not found.
147 struct ust_app
*ust_app_find_by_pid(pid_t pid
)
149 struct cds_lfht_node
*node
;
150 struct cds_lfht_iter iter
;
153 node
= hashtable_lookup(ust_app_ht
,
154 (void *)((unsigned long) pid
), sizeof(void *), &iter
);
157 DBG2("UST app no found with pid %d", pid
);
162 DBG2("Found UST app by pid %d", pid
);
164 return caa_container_of(node
, struct ust_app
, node
);
171 * Using pid and uid (of the app), allocate a new ust_app struct and
172 * add it to the global traceable app list.
174 * On success, return 0, else return malloc ENOMEM.
176 int ust_app_register(struct ust_register_msg
*msg
, int sock
)
180 lta
= malloc(sizeof(struct ust_app
));
188 lta
->key
.pid
= msg
->pid
;
189 lta
->ppid
= msg
->ppid
;
190 lta
->v_major
= msg
->major
;
191 lta
->v_minor
= msg
->minor
;
192 lta
->key
.sock
= sock
;
193 strncpy(lta
->name
, msg
->name
, sizeof(lta
->name
));
194 lta
->name
[16] = '\0';
195 hashtable_node_init(<a
->node
, (void *)((unsigned long)lta
->key
.pid
),
198 /* Session hashtable */
199 lta
->sessions
= hashtable_new(0);
201 /* Set sock key map */
202 hashtable_node_init(<a
->key
.node
, (void *)((unsigned long)lta
->key
.sock
),
206 hashtable_add_unique(ust_app_ht
, <a
->node
);
207 hashtable_add_unique(ust_app_sock_key_map
, <a
->key
.node
);
210 DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s"
211 " (version %d.%d)", lta
->key
.pid
, lta
->ppid
, lta
->uid
, lta
->gid
,
212 lta
->key
.sock
, lta
->name
, lta
->v_major
, lta
->v_minor
);
218 * Unregister app by removing it from the global traceable app list and freeing
221 * The socket is already closed at this point so no close to sock.
223 void ust_app_unregister(int sock
)
226 struct cds_lfht_node
*node
;
227 struct cds_lfht_iter iter
;
230 lta
= find_app_by_sock(sock
);
232 ERR("Unregister app sock %d not found!", sock
);
236 DBG("PID %d unregistering with sock %d", lta
->key
.pid
, sock
);
238 /* Get the node reference for a call_rcu */
239 node
= hashtable_lookup(ust_app_ht
,
240 (void *)((unsigned long) lta
->key
.pid
), sizeof(void *), &iter
);
242 ERR("Unable to find app sock %d by pid %d", sock
, lta
->key
.pid
);
246 call_rcu(&node
->head
, delete_ust_app_rcu
);
254 * Return traceable_app_count
256 unsigned long ust_app_list_count(void)
261 count
= hashtable_get_count(ust_app_ht
);
268 * Free and clean all traceable apps of the global list.
270 void ust_app_clean_list(void)
273 struct cds_lfht_node
*node
;
274 struct cds_lfht_iter iter
;
276 DBG2("UST app clean hash table");
280 hashtable_get_first(ust_app_ht
, &iter
);
281 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
282 ret
= hashtable_del(ust_app_ht
, &iter
);
284 call_rcu(&node
->head
, delete_ust_app_rcu
);
286 hashtable_get_next(ust_app_ht
, &iter
);
293 * Init UST app hash table.
295 void ust_app_ht_alloc(void)
297 ust_app_ht
= hashtable_new(0);
298 ust_app_sock_key_map
= hashtable_new(0);
302 * Alloc new UST app session.
304 static struct ust_app_session
*alloc_ust_app_session(void)
306 struct ust_app_session
*ua_sess
;
308 /* Init most of the default value by allocating and zeroing */
309 ua_sess
= zmalloc(sizeof(struct ust_app_session
));
310 if (ua_sess
== NULL
) {
315 ua_sess
->handle
= -1;
316 ua_sess
->channels
= hashtable_new_str(0);
325 * Alloc new UST app channel.
327 static struct ust_app_channel
*alloc_ust_app_channel(char *name
)
329 struct ust_app_channel
*ua_chan
;
331 /* Init most of the default value by allocating and zeroing */
332 ua_chan
= zmalloc(sizeof(struct ust_app_channel
));
333 if (ua_chan
== NULL
) {
338 strncpy(ua_chan
->name
, name
, sizeof(ua_chan
->name
));
339 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
340 ua_chan
->handle
= -1;
341 ua_chan
->ctx
= hashtable_new(0);
342 CDS_INIT_LIST_HEAD(&ua_chan
->streams
.head
);
343 ua_chan
->events
= hashtable_new_str(0);
344 hashtable_node_init(&ua_chan
->node
, (void *) ua_chan
->name
,
345 strlen(ua_chan
->name
));
347 DBG3("UST app channel %s allocated", ua_chan
->name
);
356 * Alloc new UST app event.
358 static struct ust_app_event
*alloc_ust_app_event(char *name
)
360 struct ust_app_event
*ua_event
;
362 /* Init most of the default value by allocating and zeroing */
363 ua_event
= zmalloc(sizeof(struct ust_app_event
));
364 if (ua_event
== NULL
) {
369 strncpy(ua_event
->name
, name
, sizeof(ua_event
->name
));
370 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
371 ua_event
->ctx
= hashtable_new(0);
372 hashtable_node_init(&ua_event
->node
, (void *) ua_event
->name
,
373 strlen(ua_event
->name
));
375 DBG3("UST app event %s allocated", ua_event
->name
);
383 static void shadow_copy_event(struct ust_app_event
*ua_event
,
384 struct ltt_ust_event
*uevent
)
386 strncpy(ua_event
->name
, uevent
->attr
.name
, sizeof(ua_event
->name
));
387 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
389 /* TODO: support copy context */
392 static void shadow_copy_channel(struct ust_app_channel
*ua_chan
,
393 struct ltt_ust_channel
*uchan
)
395 struct cds_lfht_iter iter
;
396 struct cds_lfht_node
*node
, *ua_event_node
;
397 struct ltt_ust_event
*uevent
;
398 struct ust_app_event
*ua_event
;
400 DBG2("Shadow copy of UST app channel %s", ua_chan
->name
);
402 strncpy(ua_chan
->name
, uchan
->name
, sizeof(ua_chan
->name
));
403 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
405 /* TODO: support copy context */
407 /* Copy all events from ltt ust channel to ust app channel */
408 hashtable_get_first(uchan
->events
, &iter
);
409 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
410 uevent
= caa_container_of(node
, struct ltt_ust_event
, node
);
412 ua_event_node
= hashtable_lookup(ua_chan
->events
,
413 (void *) uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
414 if (ua_event_node
== NULL
) {
415 DBG2("UST event %s not found on shadow copy channel",
417 ua_event
= alloc_ust_app_event(uevent
->attr
.name
);
418 if (ua_event
== NULL
) {
421 shadow_copy_event(ua_event
, uevent
);
422 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
426 /* Get next UST events */
427 hashtable_get_next(uchan
->events
, &iter
);
430 DBG3("Shadow copy channel done");
433 static void shadow_copy_session(struct ust_app_session
*ua_sess
,
434 struct ltt_ust_session
*usess
)
436 struct cds_lfht_node
*node
, *ua_chan_node
;
437 struct cds_lfht_iter iter
;
438 struct ltt_ust_channel
*uchan
;
439 struct ust_app_channel
*ua_chan
;
441 DBG2("Shadow copy of session handle %d", ua_sess
->handle
);
443 ua_sess
->uid
= usess
->uid
;
445 /* TODO: support all UST domain */
447 /* Iterate over all channels in global domain. */
448 hashtable_get_first(usess
->domain_global
.channels
, &iter
);
449 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
450 uchan
= caa_container_of(node
, struct ltt_ust_channel
, node
);
452 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
453 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
454 if (ua_chan_node
== NULL
) {
455 DBG2("Channel %s not found on shadow session copy, creating it",
457 ua_chan
= alloc_ust_app_channel(uchan
->name
);
458 if (ua_chan
== NULL
) {
459 /* malloc failed... continuing */
463 shadow_copy_channel(ua_chan
, uchan
);
464 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
468 /* Next item in hash table */
469 hashtable_get_next(usess
->domain_global
.channels
, &iter
);
474 * Return ust app session from the app session hashtable using the UST session
477 static struct ust_app_session
*lookup_session_by_app(
478 struct ltt_ust_session
*usess
, struct ust_app
*app
)
480 struct cds_lfht_iter iter
;
481 struct cds_lfht_node
*node
;
483 /* Get right UST app session from app */
484 node
= hashtable_lookup(app
->sessions
,
485 (void *) ((unsigned long) usess
->uid
), sizeof(void *), &iter
);
490 return caa_container_of(node
, struct ust_app_session
, node
);
497 * Create a UST session onto the tracer of app and add it the session
500 * Return ust app session or NULL on error.
502 static struct ust_app_session
*create_ust_app_session(
503 struct ltt_ust_session
*usess
, struct ust_app
*app
)
506 struct ust_app_session
*ua_sess
;
508 ua_sess
= lookup_session_by_app(usess
, app
);
509 if (ua_sess
== NULL
) {
510 DBG2("UST app pid: %d session uid %d not found, creating it",
511 app
->key
.pid
, usess
->uid
);
512 ua_sess
= alloc_ust_app_session();
513 if (ua_sess
== NULL
) {
514 /* Only malloc can failed so something is really wrong */
517 shadow_copy_session(ua_sess
, usess
);
520 if (ua_sess
->handle
== -1) {
521 ret
= ustctl_create_session(app
->key
.sock
);
523 ERR("Error creating session for app pid %d, sock %d",
524 app
->key
.pid
, app
->key
.sock
);
525 /* TODO: free() ua_sess */
529 DBG2("UST app ustctl create session handle %d", ret
);
530 ua_sess
->handle
= ret
;
532 /* Add ust app session to app's HT */
533 hashtable_node_init(&ua_sess
->node
,
534 (void *)((unsigned long) ua_sess
->uid
), sizeof(void *));
535 hashtable_add_unique(app
->sessions
, &ua_sess
->node
);
537 DBG2("UST app session created successfully with handle %d", ret
);
546 static struct ust_app_channel
*create_ust_app_channel(
547 struct ust_app_session
*ua_sess
, struct ltt_ust_channel
*uchan
,
551 struct cds_lfht_iter iter
;
552 struct cds_lfht_node
*ua_chan_node
;
553 struct ust_app_channel
*ua_chan
;
555 /* Lookup channel in the ust app session */
556 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
557 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
558 if (ua_chan_node
== NULL
) {
559 DBG2("Unable to find channel %s in ust session uid %u",
560 uchan
->name
, ua_sess
->uid
);
561 ua_chan
= alloc_ust_app_channel(uchan
->name
);
562 if (ua_chan
== NULL
) {
565 shadow_copy_channel(ua_chan
, uchan
);
566 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
568 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
571 /* TODO: remove cast and use lttng-ust-abi.h */
572 ret
= ustctl_create_channel(app
->key
.sock
, ua_sess
->handle
,
573 (struct lttng_ust_channel_attr
*)&uchan
->attr
, &ua_chan
->obj
);
575 DBG("Error creating channel %s for app (pid: %d, sock: %d) "
576 "and session handle %d with ret %d",
577 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
,
578 ua_sess
->handle
, ret
);
582 ua_chan
->handle
= ua_chan
->obj
->handle
;
583 ua_chan
->attr
.shm_fd
= ua_chan
->obj
->shm_fd
;
584 ua_chan
->attr
.wait_fd
= ua_chan
->obj
->wait_fd
;
585 ua_chan
->attr
.memory_map_size
= ua_chan
->obj
->memory_map_size
;
587 DBG2("Channel %s UST create successfully for pid:%d and sock:%d",
588 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
);
596 static struct ust_app_event
*create_ust_app_event(
597 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
,
598 struct ltt_ust_event
*uevent
, struct ust_app
*app
)
601 struct cds_lfht_iter iter
;
602 struct cds_lfht_node
*ua_event_node
;
603 struct ust_app_event
*ua_event
;
606 ua_event_node
= hashtable_lookup(ua_chan
->events
,
607 (void *)uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
608 if (ua_event_node
== NULL
) {
609 DBG2("UST app event %s not found, creating it", uevent
->attr
.name
);
610 /* Does not exist so create one */
611 ua_event
= alloc_ust_app_event(uevent
->attr
.name
);
612 if (ua_event
== NULL
) {
613 /* Only malloc can failed so something is really wrong */
616 shadow_copy_event(ua_event
, uevent
);
618 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
620 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
623 /* Create UST event on tracer */
624 ret
= ustctl_create_event(app
->key
.sock
, &uevent
->attr
, ua_chan
->obj
,
627 ERR("Error ustctl create event %s for app pid: %d with ret %d",
628 uevent
->attr
.name
, app
->key
.pid
, ret
);
629 /* TODO: free() ua_event */
632 ua_event
->handle
= ua_event
->obj
->handle
;
633 ua_event
->enabled
= 1;
636 DBG2("Event %s UST create successfully for pid:%d", uevent
->attr
.name
,
645 static int create_ust_app_metadata(struct ust_app_session
*ua_sess
,
646 char *pathname
, struct ust_app
*app
)
649 struct lttng_ust_channel_attr uattr
;
651 if (ua_sess
->metadata
== NULL
) {
652 /* Allocate UST metadata */
653 ua_sess
->metadata
= trace_ust_create_metadata(pathname
);
654 if (ua_sess
->metadata
== NULL
) {
655 ERR("UST app session %d creating metadata failed",
660 uattr
.overwrite
= ua_sess
->metadata
->attr
.overwrite
;
661 uattr
.subbuf_size
= ua_sess
->metadata
->attr
.subbuf_size
;
662 uattr
.num_subbuf
= ua_sess
->metadata
->attr
.num_subbuf
;
663 uattr
.switch_timer_interval
=
664 ua_sess
->metadata
->attr
.switch_timer_interval
;
665 uattr
.read_timer_interval
=
666 ua_sess
->metadata
->attr
.read_timer_interval
;
667 uattr
.output
= ua_sess
->metadata
->attr
.output
;
669 /* UST tracer metadata creation */
670 ret
= ustctl_open_metadata(app
->key
.sock
, ua_sess
->handle
, &uattr
,
671 &ua_sess
->metadata
->obj
);
673 ERR("UST app open metadata failed for app pid:%d",
678 DBG2("UST metadata opened for app pid %d", app
->key
.pid
);
681 /* Open UST metadata stream */
682 if (ua_sess
->metadata
->stream_obj
== NULL
) {
683 ret
= ustctl_create_stream(app
->key
.sock
, ua_sess
->metadata
->obj
,
684 &ua_sess
->metadata
->stream_obj
);
686 ERR("UST create metadata stream failed");
690 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
, "%s/%s-%d",
691 pathname
, app
->name
, app
->key
.pid
);
693 PERROR("asprintf UST create stream");
697 ret
= mkdir(ua_sess
->metadata
->pathname
, S_IRWXU
| S_IRWXG
);
699 PERROR("mkdir UST metadata");
703 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
, "%s/%s-%d/metadata",
704 pathname
, app
->name
, app
->key
.pid
);
706 PERROR("asprintf UST create stream");
710 DBG2("UST metadata stream object created for app pid %d",
721 * Add channel to all ust app session.
723 int ust_app_add_channel_all(struct ltt_ust_session
*usess
,
724 struct ltt_ust_channel
*uchan
)
727 struct cds_lfht_iter iter
;
728 struct cds_lfht_node
*node
;
730 struct ust_app_session
*ua_sess
;
731 struct ust_app_channel
*ua_chan
;
733 if (usess
== NULL
|| uchan
== NULL
) {
734 ERR("Adding UST global channel to NULL values");
739 DBG2("UST app adding channel %s to global domain for session uid %d",
740 uchan
->name
, usess
->uid
);
744 /* For every UST applications registered */
745 hashtable_get_first(ust_app_ht
, &iter
);
746 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
747 app
= caa_container_of(node
, struct ust_app
, node
);
749 /* Create session on the tracer side and add it to app session HT */
750 ua_sess
= create_ust_app_session(usess
, app
);
755 /* Create channel onto application */
756 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
757 if (ua_chan
== NULL
) {
762 /* Next applications */
763 hashtable_get_next(ust_app_ht
, &iter
);
771 int ust_app_add_event_all(struct ltt_ust_session
*usess
,
772 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
775 struct cds_lfht_iter iter
;
776 struct cds_lfht_node
*node
, *ua_chan_node
;
778 struct ust_app_session
*ua_sess
;
779 struct ust_app_channel
*ua_chan
;
780 struct ust_app_event
*ua_event
;
782 DBG2("UST app adding event %s to global domain for session uid %d",
783 uevent
->attr
.name
, usess
->uid
);
787 /* For all registered applications */
788 hashtable_get_first(ust_app_ht
, &iter
);
789 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
790 app
= caa_container_of(node
, struct ust_app
, node
);
792 /* Create session on the tracer side and add it to app session HT */
793 ua_sess
= create_ust_app_session(usess
, app
);
798 /* Lookup channel in the ust app session */
799 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
800 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
801 if (ua_chan_node
== NULL
) {
802 ERR("Channel %s not found in session uid %d. Skipping",
803 uchan
->name
, usess
->uid
);
806 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
808 ua_event
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
809 if (ua_event
== NULL
) {
814 /* Next applications */
815 hashtable_get_next(ust_app_ht
, &iter
);
822 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
825 struct cds_lfht_iter iter
;
826 struct cds_lfht_node
*node
;
827 struct ust_app_session
*ua_sess
;
828 struct ust_app_channel
*ua_chan
;
830 DBG("Starting tracing for ust app pid %d", app
->key
.pid
);
832 ua_sess
= lookup_session_by_app(usess
, app
);
833 if (ua_sess
== NULL
) {
834 /* Only malloc can failed so something is really wrong */
838 ret
= create_ust_app_metadata(ua_sess
, usess
->pathname
, app
);
843 /* For each channel */
844 hashtable_get_first(ua_sess
->channels
, &iter
);
845 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
846 ua_chan
= caa_container_of(node
, struct ust_app_channel
, node
);
848 /* Create all streams */
850 struct ltt_ust_stream
*ustream
;
852 ustream
= zmalloc(sizeof(*ustream
));
853 if (ustream
== NULL
) {
854 PERROR("zmalloc ust stream");
858 ret
= ustctl_create_stream(app
->key
.sock
, ua_chan
->obj
,
861 /* Got all streams */
864 ustream
->handle
= ustream
->obj
->handle
;
866 /* Order is important */
867 cds_list_add_tail(&ustream
->list
, &ua_chan
->streams
.head
);
868 ret
= snprintf(ustream
->pathname
, PATH_MAX
, "%s/%s-%d/%s_%u",
869 usess
->pathname
, app
->name
, app
->key
.pid
,
870 ua_chan
->name
, ua_chan
->streams
.count
++);
872 PERROR("asprintf UST create stream");
875 DBG2("UST stream %d ready at %s", ua_chan
->streams
.count
,
879 /* Next applications */
880 hashtable_get_next(ua_sess
->channels
, &iter
);
883 /* Setup UST consumer socket and send fds to it */
884 ret
= ust_consumer_send_session(usess
->consumer_fd
, ua_sess
);
889 /* This start the UST tracing */
890 ret
= ustctl_start_session(app
->key
.sock
, ua_sess
->handle
);
892 ERR("Error starting tracing for app pid: %d", app
->key
.pid
);
896 /* Quiescent wait after starting trace */
897 ustctl_wait_quiescent(app
->key
.sock
);
905 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
908 struct cds_lfht_iter iter
;
909 struct cds_lfht_node
*node
;
912 DBG("Starting all UST traces");
915 hashtable_get_first(ust_app_ht
, &iter
);
916 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
917 app
= caa_container_of(node
, struct ust_app
, node
);
919 ret
= ust_app_start_trace(usess
, app
);
925 /* Next applications */
926 hashtable_get_next(ust_app_ht
, &iter
);
933 void ust_app_global_update(struct ltt_ust_session
*usess
, int sock
)
936 struct cds_lfht_iter iter
;
937 struct cds_lfht_node
*node
;
939 struct ust_app_session
*ua_sess
;
940 struct ust_app_channel
*ua_chan
;
941 struct ust_app_event
*ua_event
;
942 struct ltt_ust_channel
*uchan
;
943 struct ltt_ust_event
*uevent
;
948 DBG2("No UST session on global update. Returning");
952 DBG2("UST app global update for app sock %d for session uid %d", sock
,
955 app
= find_app_by_sock(sock
);
957 ERR("Failed to update app sock %d", sock
);
961 ua_sess
= create_ust_app_session(usess
, app
);
962 if (ua_sess
== NULL
) {
966 hashtable_get_first(usess
->domain_global
.channels
, &iter
);
967 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
968 uchan
= caa_container_of(node
, struct ltt_ust_channel
, node
);
970 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
971 if (ua_chan
== NULL
) {
975 hashtable_get_first(uchan
->events
, &iter
);
976 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
977 uevent
= caa_container_of(node
, struct ltt_ust_event
, node
);
979 ua_event
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
980 if (ua_event
== NULL
) {
985 hashtable_get_next(uchan
->events
, &iter
);
989 /* Next item in hash table */
990 hashtable_get_next(usess
->domain_global
.channels
, &iter
);
993 if (usess
->start_trace
) {
994 ret
= ust_app_start_trace(usess
, app
);
999 DBG2("UST trace started for app pid %d", app
->key
.pid
);