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 * Fill events array with all events name of all registered apps.
270 int ust_app_list_events(struct lttng_event
**events
)
273 size_t nbmem
, count
= 0;
274 struct cds_lfht_iter iter
;
276 struct lttng_event
*tmp
;
278 nbmem
= UST_APP_EVENT_LIST_SIZE
;
279 tmp
= zmalloc(nbmem
* sizeof(struct lttng_event
));
281 PERROR("zmalloc ust app events");
288 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
289 handle
= ustctl_tracepoint_list(app
->key
.sock
);
291 ERR("UST app list events getting handle failed for app pid %d",
296 while ((ret
= ustctl_tracepoint_list_get(app
->key
.sock
, handle
,
297 tmp
[count
].name
)) != -ENOENT
) {
299 DBG2("Reallocating event list from %zu to %zu bytes", nbmem
,
300 nbmem
+ UST_APP_EVENT_LIST_SIZE
);
301 nbmem
+= UST_APP_EVENT_LIST_SIZE
;
302 tmp
= realloc(tmp
, nbmem
);
304 PERROR("realloc ust app events");
310 tmp
[count
].type
= LTTNG_UST_TRACEPOINT
;
311 tmp
[count
].pid
= app
->key
.pid
;
319 DBG2("UST app list events done (%zu events)", count
);
328 * Free and clean all traceable apps of the global list.
330 void ust_app_clean_list(void)
333 struct cds_lfht_node
*node
;
334 struct cds_lfht_iter iter
;
336 DBG2("UST app clean hash table");
340 hashtable_get_first(ust_app_ht
, &iter
);
341 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
342 ret
= hashtable_del(ust_app_ht
, &iter
);
344 call_rcu(&node
->head
, delete_ust_app_rcu
);
346 hashtable_get_next(ust_app_ht
, &iter
);
353 * Init UST app hash table.
355 void ust_app_ht_alloc(void)
357 ust_app_ht
= hashtable_new(0);
358 ust_app_sock_key_map
= hashtable_new(0);
362 * Alloc new UST app session.
364 static struct ust_app_session
*alloc_ust_app_session(void)
366 struct ust_app_session
*ua_sess
;
368 /* Init most of the default value by allocating and zeroing */
369 ua_sess
= zmalloc(sizeof(struct ust_app_session
));
370 if (ua_sess
== NULL
) {
375 ua_sess
->handle
= -1;
376 ua_sess
->channels
= hashtable_new_str(0);
385 * Alloc new UST app channel.
387 static struct ust_app_channel
*alloc_ust_app_channel(char *name
)
389 struct ust_app_channel
*ua_chan
;
391 /* Init most of the default value by allocating and zeroing */
392 ua_chan
= zmalloc(sizeof(struct ust_app_channel
));
393 if (ua_chan
== NULL
) {
398 strncpy(ua_chan
->name
, name
, sizeof(ua_chan
->name
));
399 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
400 ua_chan
->handle
= -1;
401 ua_chan
->ctx
= hashtable_new(0);
402 CDS_INIT_LIST_HEAD(&ua_chan
->streams
.head
);
403 ua_chan
->events
= hashtable_new_str(0);
404 hashtable_node_init(&ua_chan
->node
, (void *) ua_chan
->name
,
405 strlen(ua_chan
->name
));
407 DBG3("UST app channel %s allocated", ua_chan
->name
);
416 * Alloc new UST app event.
418 static struct ust_app_event
*alloc_ust_app_event(char *name
)
420 struct ust_app_event
*ua_event
;
422 /* Init most of the default value by allocating and zeroing */
423 ua_event
= zmalloc(sizeof(struct ust_app_event
));
424 if (ua_event
== NULL
) {
429 strncpy(ua_event
->name
, name
, sizeof(ua_event
->name
));
430 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
431 ua_event
->ctx
= hashtable_new(0);
432 hashtable_node_init(&ua_event
->node
, (void *) ua_event
->name
,
433 strlen(ua_event
->name
));
435 DBG3("UST app event %s allocated", ua_event
->name
);
443 static void shadow_copy_event(struct ust_app_event
*ua_event
,
444 struct ltt_ust_event
*uevent
)
446 strncpy(ua_event
->name
, uevent
->attr
.name
, sizeof(ua_event
->name
));
447 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
449 /* TODO: support copy context */
452 static void shadow_copy_channel(struct ust_app_channel
*ua_chan
,
453 struct ltt_ust_channel
*uchan
)
455 struct cds_lfht_iter iter
;
456 struct cds_lfht_node
*node
, *ua_event_node
;
457 struct ltt_ust_event
*uevent
;
458 struct ust_app_event
*ua_event
;
460 DBG2("Shadow copy of UST app channel %s", ua_chan
->name
);
462 strncpy(ua_chan
->name
, uchan
->name
, sizeof(ua_chan
->name
));
463 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
465 /* TODO: support copy context */
467 /* Copy all events from ltt ust channel to ust app channel */
468 hashtable_get_first(uchan
->events
, &iter
);
469 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
470 uevent
= caa_container_of(node
, struct ltt_ust_event
, node
);
472 ua_event_node
= hashtable_lookup(ua_chan
->events
,
473 (void *) uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
474 if (ua_event_node
== NULL
) {
475 DBG2("UST event %s not found on shadow copy channel",
477 ua_event
= alloc_ust_app_event(uevent
->attr
.name
);
478 if (ua_event
== NULL
) {
481 shadow_copy_event(ua_event
, uevent
);
482 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
486 /* Get next UST events */
487 hashtable_get_next(uchan
->events
, &iter
);
490 DBG3("Shadow copy channel done");
493 static void shadow_copy_session(struct ust_app_session
*ua_sess
,
494 struct ltt_ust_session
*usess
)
496 struct cds_lfht_node
*node
, *ua_chan_node
;
497 struct cds_lfht_iter iter
;
498 struct ltt_ust_channel
*uchan
;
499 struct ust_app_channel
*ua_chan
;
501 DBG2("Shadow copy of session handle %d", ua_sess
->handle
);
503 ua_sess
->uid
= usess
->uid
;
505 /* TODO: support all UST domain */
507 /* Iterate over all channels in global domain. */
508 hashtable_get_first(usess
->domain_global
.channels
, &iter
);
509 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
510 uchan
= caa_container_of(node
, struct ltt_ust_channel
, node
);
512 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
513 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
514 if (ua_chan_node
== NULL
) {
515 DBG2("Channel %s not found on shadow session copy, creating it",
517 ua_chan
= alloc_ust_app_channel(uchan
->name
);
518 if (ua_chan
== NULL
) {
519 /* malloc failed... continuing */
523 shadow_copy_channel(ua_chan
, uchan
);
524 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
528 /* Next item in hash table */
529 hashtable_get_next(usess
->domain_global
.channels
, &iter
);
534 * Return ust app session from the app session hashtable using the UST session
537 static struct ust_app_session
*lookup_session_by_app(
538 struct ltt_ust_session
*usess
, struct ust_app
*app
)
540 struct cds_lfht_iter iter
;
541 struct cds_lfht_node
*node
;
543 /* Get right UST app session from app */
544 node
= hashtable_lookup(app
->sessions
,
545 (void *) ((unsigned long) usess
->uid
), sizeof(void *), &iter
);
550 return caa_container_of(node
, struct ust_app_session
, node
);
557 * Create a UST session onto the tracer of app and add it the session
560 * Return ust app session or NULL on error.
562 static struct ust_app_session
*create_ust_app_session(
563 struct ltt_ust_session
*usess
, struct ust_app
*app
)
566 struct ust_app_session
*ua_sess
;
568 ua_sess
= lookup_session_by_app(usess
, app
);
569 if (ua_sess
== NULL
) {
570 DBG2("UST app pid: %d session uid %d not found, creating it",
571 app
->key
.pid
, usess
->uid
);
572 ua_sess
= alloc_ust_app_session();
573 if (ua_sess
== NULL
) {
574 /* Only malloc can failed so something is really wrong */
577 shadow_copy_session(ua_sess
, usess
);
580 if (ua_sess
->handle
== -1) {
581 ret
= ustctl_create_session(app
->key
.sock
);
583 ERR("Error creating session for app pid %d, sock %d",
584 app
->key
.pid
, app
->key
.sock
);
585 /* TODO: free() ua_sess */
589 DBG2("UST app ustctl create session handle %d", ret
);
590 ua_sess
->handle
= ret
;
592 /* Add ust app session to app's HT */
593 hashtable_node_init(&ua_sess
->node
,
594 (void *)((unsigned long) ua_sess
->uid
), sizeof(void *));
595 hashtable_add_unique(app
->sessions
, &ua_sess
->node
);
597 DBG2("UST app session created successfully with handle %d", ret
);
606 static struct ust_app_channel
*create_ust_app_channel(
607 struct ust_app_session
*ua_sess
, struct ltt_ust_channel
*uchan
,
611 struct cds_lfht_iter iter
;
612 struct cds_lfht_node
*ua_chan_node
;
613 struct ust_app_channel
*ua_chan
;
615 /* Lookup channel in the ust app session */
616 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
617 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
618 if (ua_chan_node
== NULL
) {
619 DBG2("Unable to find channel %s in ust session uid %u",
620 uchan
->name
, ua_sess
->uid
);
621 ua_chan
= alloc_ust_app_channel(uchan
->name
);
622 if (ua_chan
== NULL
) {
625 shadow_copy_channel(ua_chan
, uchan
);
626 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
628 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
631 /* TODO: remove cast and use lttng-ust-abi.h */
632 ret
= ustctl_create_channel(app
->key
.sock
, ua_sess
->handle
,
633 (struct lttng_ust_channel_attr
*)&uchan
->attr
, &ua_chan
->obj
);
635 DBG("Error creating channel %s for app (pid: %d, sock: %d) "
636 "and session handle %d with ret %d",
637 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
,
638 ua_sess
->handle
, ret
);
642 ua_chan
->handle
= ua_chan
->obj
->handle
;
643 ua_chan
->attr
.shm_fd
= ua_chan
->obj
->shm_fd
;
644 ua_chan
->attr
.wait_fd
= ua_chan
->obj
->wait_fd
;
645 ua_chan
->attr
.memory_map_size
= ua_chan
->obj
->memory_map_size
;
647 DBG2("Channel %s UST create successfully for pid:%d and sock:%d",
648 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
);
656 static struct ust_app_event
*create_ust_app_event(
657 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
,
658 struct ltt_ust_event
*uevent
, struct ust_app
*app
)
661 struct cds_lfht_iter iter
;
662 struct cds_lfht_node
*ua_event_node
;
663 struct ust_app_event
*ua_event
;
666 ua_event_node
= hashtable_lookup(ua_chan
->events
,
667 (void *)uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
668 if (ua_event_node
== NULL
) {
669 DBG2("UST app event %s not found, creating it", uevent
->attr
.name
);
670 /* Does not exist so create one */
671 ua_event
= alloc_ust_app_event(uevent
->attr
.name
);
672 if (ua_event
== NULL
) {
673 /* Only malloc can failed so something is really wrong */
676 shadow_copy_event(ua_event
, uevent
);
678 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
680 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
683 /* Create UST event on tracer */
684 ret
= ustctl_create_event(app
->key
.sock
, &uevent
->attr
, ua_chan
->obj
,
687 ERR("Error ustctl create event %s for app pid: %d with ret %d",
688 uevent
->attr
.name
, app
->key
.pid
, ret
);
689 /* TODO: free() ua_event */
692 ua_event
->handle
= ua_event
->obj
->handle
;
693 ua_event
->enabled
= 1;
696 DBG2("Event %s UST create successfully for pid:%d", uevent
->attr
.name
,
705 static int create_ust_app_metadata(struct ust_app_session
*ua_sess
,
706 char *pathname
, struct ust_app
*app
)
709 struct lttng_ust_channel_attr uattr
;
711 if (ua_sess
->metadata
== NULL
) {
712 /* Allocate UST metadata */
713 ua_sess
->metadata
= trace_ust_create_metadata(pathname
);
714 if (ua_sess
->metadata
== NULL
) {
715 ERR("UST app session %d creating metadata failed",
720 uattr
.overwrite
= ua_sess
->metadata
->attr
.overwrite
;
721 uattr
.subbuf_size
= ua_sess
->metadata
->attr
.subbuf_size
;
722 uattr
.num_subbuf
= ua_sess
->metadata
->attr
.num_subbuf
;
723 uattr
.switch_timer_interval
=
724 ua_sess
->metadata
->attr
.switch_timer_interval
;
725 uattr
.read_timer_interval
=
726 ua_sess
->metadata
->attr
.read_timer_interval
;
727 uattr
.output
= ua_sess
->metadata
->attr
.output
;
729 /* UST tracer metadata creation */
730 ret
= ustctl_open_metadata(app
->key
.sock
, ua_sess
->handle
, &uattr
,
731 &ua_sess
->metadata
->obj
);
733 ERR("UST app open metadata failed for app pid:%d",
738 DBG2("UST metadata opened for app pid %d", app
->key
.pid
);
741 /* Open UST metadata stream */
742 if (ua_sess
->metadata
->stream_obj
== NULL
) {
743 ret
= ustctl_create_stream(app
->key
.sock
, ua_sess
->metadata
->obj
,
744 &ua_sess
->metadata
->stream_obj
);
746 ERR("UST create metadata stream failed");
750 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
, "%s/%s-%d",
751 pathname
, app
->name
, app
->key
.pid
);
753 PERROR("asprintf UST create stream");
757 ret
= mkdir(ua_sess
->metadata
->pathname
, S_IRWXU
| S_IRWXG
);
759 PERROR("mkdir UST metadata");
763 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
, "%s/%s-%d/metadata",
764 pathname
, app
->name
, app
->key
.pid
);
766 PERROR("asprintf UST create stream");
770 DBG2("UST metadata stream object created for app pid %d",
781 * Add channel to all ust app session.
783 int ust_app_add_channel_all(struct ltt_ust_session
*usess
,
784 struct ltt_ust_channel
*uchan
)
787 struct cds_lfht_iter iter
;
788 struct cds_lfht_node
*node
;
790 struct ust_app_session
*ua_sess
;
791 struct ust_app_channel
*ua_chan
;
793 if (usess
== NULL
|| uchan
== NULL
) {
794 ERR("Adding UST global channel to NULL values");
799 DBG2("UST app adding channel %s to global domain for session uid %d",
800 uchan
->name
, usess
->uid
);
804 /* For every UST applications registered */
805 hashtable_get_first(ust_app_ht
, &iter
);
806 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
807 app
= caa_container_of(node
, struct ust_app
, node
);
809 /* Create session on the tracer side and add it to app session HT */
810 ua_sess
= create_ust_app_session(usess
, app
);
815 /* Create channel onto application */
816 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
817 if (ua_chan
== NULL
) {
822 /* Next applications */
823 hashtable_get_next(ust_app_ht
, &iter
);
831 int ust_app_add_event_all(struct ltt_ust_session
*usess
,
832 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
835 struct cds_lfht_iter iter
;
836 struct cds_lfht_node
*node
, *ua_chan_node
;
838 struct ust_app_session
*ua_sess
;
839 struct ust_app_channel
*ua_chan
;
840 struct ust_app_event
*ua_event
;
842 DBG2("UST app adding event %s to global domain for session uid %d",
843 uevent
->attr
.name
, usess
->uid
);
847 /* For all registered applications */
848 hashtable_get_first(ust_app_ht
, &iter
);
849 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
850 app
= caa_container_of(node
, struct ust_app
, node
);
852 /* Create session on the tracer side and add it to app session HT */
853 ua_sess
= create_ust_app_session(usess
, app
);
858 /* Lookup channel in the ust app session */
859 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
860 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
861 if (ua_chan_node
== NULL
) {
862 ERR("Channel %s not found in session uid %d. Skipping",
863 uchan
->name
, usess
->uid
);
866 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
868 ua_event
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
869 if (ua_event
== NULL
) {
874 /* Next applications */
875 hashtable_get_next(ust_app_ht
, &iter
);
882 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
885 struct cds_lfht_iter iter
;
886 struct cds_lfht_node
*node
;
887 struct ust_app_session
*ua_sess
;
888 struct ust_app_channel
*ua_chan
;
890 DBG("Starting tracing for ust app pid %d", app
->key
.pid
);
892 ua_sess
= lookup_session_by_app(usess
, app
);
893 if (ua_sess
== NULL
) {
894 /* Only malloc can failed so something is really wrong */
898 ret
= create_ust_app_metadata(ua_sess
, usess
->pathname
, app
);
903 /* For each channel */
904 hashtable_get_first(ua_sess
->channels
, &iter
);
905 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
906 ua_chan
= caa_container_of(node
, struct ust_app_channel
, node
);
908 /* Create all streams */
910 struct ltt_ust_stream
*ustream
;
912 ustream
= zmalloc(sizeof(*ustream
));
913 if (ustream
== NULL
) {
914 PERROR("zmalloc ust stream");
918 ret
= ustctl_create_stream(app
->key
.sock
, ua_chan
->obj
,
921 /* Got all streams */
924 ustream
->handle
= ustream
->obj
->handle
;
926 /* Order is important */
927 cds_list_add_tail(&ustream
->list
, &ua_chan
->streams
.head
);
928 ret
= snprintf(ustream
->pathname
, PATH_MAX
, "%s/%s-%d/%s_%u",
929 usess
->pathname
, app
->name
, app
->key
.pid
,
930 ua_chan
->name
, ua_chan
->streams
.count
++);
932 PERROR("asprintf UST create stream");
935 DBG2("UST stream %d ready at %s", ua_chan
->streams
.count
,
939 /* Next applications */
940 hashtable_get_next(ua_sess
->channels
, &iter
);
943 /* Setup UST consumer socket and send fds to it */
944 ret
= ust_consumer_send_session(usess
->consumer_fd
, ua_sess
);
949 /* This start the UST tracing */
950 ret
= ustctl_start_session(app
->key
.sock
, ua_sess
->handle
);
952 ERR("Error starting tracing for app pid: %d", app
->key
.pid
);
956 /* Quiescent wait after starting trace */
957 ustctl_wait_quiescent(app
->key
.sock
);
965 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
968 struct cds_lfht_iter iter
;
969 struct cds_lfht_node
*node
;
972 DBG("Starting all UST traces");
975 hashtable_get_first(ust_app_ht
, &iter
);
976 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
977 app
= caa_container_of(node
, struct ust_app
, node
);
979 ret
= ust_app_start_trace(usess
, app
);
985 /* Next applications */
986 hashtable_get_next(ust_app_ht
, &iter
);
993 void ust_app_global_update(struct ltt_ust_session
*usess
, int sock
)
996 struct cds_lfht_iter iter
;
997 struct cds_lfht_node
*node
;
999 struct ust_app_session
*ua_sess
;
1000 struct ust_app_channel
*ua_chan
;
1001 struct ust_app_event
*ua_event
;
1002 struct ltt_ust_channel
*uchan
;
1003 struct ltt_ust_event
*uevent
;
1007 if (usess
== NULL
) {
1008 DBG2("No UST session on global update. Returning");
1012 DBG2("UST app global update for app sock %d for session uid %d", sock
,
1015 app
= find_app_by_sock(sock
);
1017 ERR("Failed to update app sock %d", sock
);
1021 ua_sess
= create_ust_app_session(usess
, app
);
1022 if (ua_sess
== NULL
) {
1026 hashtable_get_first(usess
->domain_global
.channels
, &iter
);
1027 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
1028 uchan
= caa_container_of(node
, struct ltt_ust_channel
, node
);
1030 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
1031 if (ua_chan
== NULL
) {
1035 hashtable_get_first(uchan
->events
, &iter
);
1036 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
1037 uevent
= caa_container_of(node
, struct ltt_ust_event
, node
);
1039 ua_event
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
1040 if (ua_event
== NULL
) {
1045 hashtable_get_next(uchan
->events
, &iter
);
1049 /* Next item in hash table */
1050 hashtable_get_next(usess
->domain_global
.channels
, &iter
);
1053 if (usess
->start_trace
) {
1054 ret
= ust_app_start_trace(usess
, app
);
1059 DBG2("UST trace started for app pid %d", app
->key
.pid
);