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 <urcu/compiler.h>
34 #include <lttng-share.h>
38 #include "ust-consumer.h"
42 * Delete ust context safely. RCU read lock must be held before calling
46 void delete_ust_app_ctx(int sock
, struct ust_app_ctx
*ua_ctx
)
49 ustctl_release_object(sock
, ua_ctx
->obj
);
56 * Delete ust app event safely. RCU read lock must be held before calling
60 void delete_ust_app_event(int sock
, struct ust_app_event
*ua_event
)
63 struct lttng_ht_iter iter
;
64 struct ust_app_ctx
*ua_ctx
;
66 cds_lfht_for_each_entry(ua_event
->ctx
->ht
, &iter
.iter
, ua_ctx
,
68 ret
= lttng_ht_del(ua_event
->ctx
, &iter
);
70 delete_ust_app_ctx(sock
, ua_ctx
);
72 lttng_ht_destroy(ua_event
->ctx
);
74 if (ua_event
->obj
!= NULL
) {
75 ustctl_release_object(sock
, ua_event
->obj
);
82 * Delete ust app stream safely. RCU read lock must be held before calling
86 void delete_ust_app_stream(int sock
, struct ltt_ust_stream
*stream
)
89 ustctl_release_object(sock
, stream
->obj
);
96 * Delete ust app channel safely. RCU read lock must be held before calling
100 void delete_ust_app_channel(int sock
, struct ust_app_channel
*ua_chan
)
103 struct lttng_ht_iter iter
;
104 struct ust_app_event
*ua_event
;
105 struct ust_app_ctx
*ua_ctx
;
106 struct ltt_ust_stream
*stream
, *stmp
;
109 cds_list_for_each_entry_safe(stream
, stmp
, &ua_chan
->streams
.head
, list
) {
110 cds_list_del(&stream
->list
);
111 delete_ust_app_stream(sock
, stream
);
115 cds_lfht_for_each_entry(ua_chan
->ctx
->ht
, &iter
.iter
, ua_ctx
, node
.node
) {
116 ret
= lttng_ht_del(ua_chan
->ctx
, &iter
);
118 delete_ust_app_ctx(sock
, ua_ctx
);
120 lttng_ht_destroy(ua_chan
->ctx
);
123 cds_lfht_for_each_entry(ua_chan
->events
->ht
, &iter
.iter
, ua_event
,
125 ret
= lttng_ht_del(ua_chan
->events
, &iter
);
127 delete_ust_app_event(sock
, ua_event
);
129 lttng_ht_destroy(ua_chan
->events
);
131 if (ua_chan
->obj
!= NULL
) {
132 ustctl_release_object(sock
, ua_chan
->obj
);
139 * Delete ust app session safely. RCU read lock must be held before calling
143 void delete_ust_app_session(int sock
, struct ust_app_session
*ua_sess
)
146 struct lttng_ht_iter iter
;
147 struct ust_app_channel
*ua_chan
;
149 if (ua_sess
->metadata
) {
150 if (ua_sess
->metadata
->stream_obj
) {
151 ustctl_release_object(sock
, ua_sess
->metadata
->stream_obj
);
152 free(ua_sess
->metadata
->stream_obj
);
154 if (ua_sess
->metadata
->obj
) {
155 ustctl_release_object(sock
, ua_sess
->metadata
->obj
);
156 free(ua_sess
->metadata
->obj
);
160 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
162 ret
= lttng_ht_del(ua_sess
->channels
, &iter
);
164 delete_ust_app_channel(sock
, ua_chan
);
166 lttng_ht_destroy(ua_sess
->channels
);
168 if (ua_sess
->handle
!= -1) {
169 ustctl_release_handle(sock
, ua_sess
->handle
);
175 * Delete a traceable application structure from the global list. Never call
176 * this function outside of a call_rcu call.
179 void delete_ust_app(struct ust_app
*app
)
182 struct lttng_ht_iter iter
;
183 struct ust_app_session
*ua_sess
;
187 /* Delete ust app sessions info */
188 sock
= app
->key
.sock
;
192 cds_lfht_for_each_entry(app
->sessions
->ht
, &iter
.iter
, ua_sess
,
194 ret
= lttng_ht_del(app
->sessions
, &iter
);
196 delete_ust_app_session(app
->key
.sock
, ua_sess
);
198 lttng_ht_destroy(app
->sessions
);
201 * Wait until we have removed the key from the sock hash table before
202 * closing this socket, otherwise an application could re-use the socket ID
203 * and race with the teardown, using the same hash table entry.
207 DBG2("UST app pid %d deleted", app
->key
.pid
);
214 * URCU intermediate call to delete an UST app.
217 void delete_ust_app_rcu(struct rcu_head
*head
)
219 struct lttng_ht_node_ulong
*node
=
220 caa_container_of(head
, struct lttng_ht_node_ulong
, head
);
221 struct ust_app
*app
=
222 caa_container_of(node
, struct ust_app
, node
);
224 DBG3("Call RCU deleting app PID %d", app
->key
.pid
);
229 * Alloc new UST app session.
232 struct ust_app_session
*alloc_ust_app_session(void)
234 struct ust_app_session
*ua_sess
;
236 /* Init most of the default value by allocating and zeroing */
237 ua_sess
= zmalloc(sizeof(struct ust_app_session
));
238 if (ua_sess
== NULL
) {
243 ua_sess
->handle
= -1;
244 ua_sess
->channels
= lttng_ht_new(0, LTTNG_HT_TYPE_STRING
);
253 * Alloc new UST app channel.
256 struct ust_app_channel
*alloc_ust_app_channel(char *name
,
257 struct lttng_ust_channel
*attr
)
259 struct ust_app_channel
*ua_chan
;
261 /* Init most of the default value by allocating and zeroing */
262 ua_chan
= zmalloc(sizeof(struct ust_app_channel
));
263 if (ua_chan
== NULL
) {
268 /* Setup channel name */
269 strncpy(ua_chan
->name
, name
, sizeof(ua_chan
->name
));
270 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
272 ua_chan
->enabled
= 1;
273 ua_chan
->handle
= -1;
274 ua_chan
->ctx
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
275 ua_chan
->events
= lttng_ht_new(0, LTTNG_HT_TYPE_STRING
);
276 lttng_ht_node_init_str(&ua_chan
->node
, ua_chan
->name
);
278 CDS_INIT_LIST_HEAD(&ua_chan
->streams
.head
);
280 /* Copy attributes */
282 memcpy(&ua_chan
->attr
, attr
, sizeof(ua_chan
->attr
));
285 DBG3("UST app channel %s allocated", ua_chan
->name
);
294 * Alloc new UST app event.
297 struct ust_app_event
*alloc_ust_app_event(char *name
,
298 struct lttng_ust_event
*attr
)
300 struct ust_app_event
*ua_event
;
302 /* Init most of the default value by allocating and zeroing */
303 ua_event
= zmalloc(sizeof(struct ust_app_event
));
304 if (ua_event
== NULL
) {
309 ua_event
->enabled
= 1;
310 strncpy(ua_event
->name
, name
, sizeof(ua_event
->name
));
311 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
312 ua_event
->ctx
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
313 lttng_ht_node_init_str(&ua_event
->node
, ua_event
->name
);
315 /* Copy attributes */
317 memcpy(&ua_event
->attr
, attr
, sizeof(ua_event
->attr
));
320 DBG3("UST app event %s allocated", ua_event
->name
);
329 * Alloc new UST app context.
332 struct ust_app_ctx
*alloc_ust_app_ctx(struct lttng_ust_context
*uctx
)
334 struct ust_app_ctx
*ua_ctx
;
336 ua_ctx
= zmalloc(sizeof(struct ust_app_ctx
));
337 if (ua_ctx
== NULL
) {
342 memcpy(&ua_ctx
->ctx
, uctx
, sizeof(ua_ctx
->ctx
));
345 DBG3("UST app context %d allocated", ua_ctx
->ctx
.ctx
);
352 * Find an ust_app using the sock and return it. RCU read side lock must be
353 * held before calling this helper function.
356 struct ust_app
*find_app_by_sock(int sock
)
358 struct lttng_ht_node_ulong
*node
;
359 struct ust_app_key
*key
;
360 struct lttng_ht_iter iter
;
362 lttng_ht_lookup(ust_app_sock_key_map
, (void *)((unsigned long) sock
),
364 node
= lttng_ht_iter_get_node_ulong(&iter
);
366 DBG2("UST app find by sock %d key not found", sock
);
369 key
= caa_container_of(node
, struct ust_app_key
, node
);
371 lttng_ht_lookup(ust_app_ht
, (void *)((unsigned long) key
->pid
), &iter
);
372 node
= lttng_ht_iter_get_node_ulong(&iter
);
374 DBG2("UST app find by sock %d not found", sock
);
377 return caa_container_of(node
, struct ust_app
, node
);
384 * Create the channel context on the tracer.
387 int create_ust_channel_context(struct ust_app_channel
*ua_chan
,
388 struct ust_app_ctx
*ua_ctx
, struct ust_app
*app
)
392 ret
= ustctl_add_context(app
->key
.sock
, &ua_ctx
->ctx
,
393 ua_chan
->obj
, &ua_ctx
->obj
);
398 ua_ctx
->handle
= ua_ctx
->obj
->handle
;
400 DBG2("UST app context added to channel %s successfully", ua_chan
->name
);
407 * Create the event context on the tracer.
410 int create_ust_event_context(struct ust_app_event
*ua_event
,
411 struct ust_app_ctx
*ua_ctx
, struct ust_app
*app
)
415 ret
= ustctl_add_context(app
->key
.sock
, &ua_ctx
->ctx
,
416 ua_event
->obj
, &ua_ctx
->obj
);
421 ua_ctx
->handle
= ua_ctx
->obj
->handle
;
423 DBG2("UST app context added to event %s successfully", ua_event
->name
);
430 * Disable the specified event on to UST tracer for the UST session.
432 static int disable_ust_event(struct ust_app
*app
,
433 struct ust_app_session
*ua_sess
, struct ust_app_event
*ua_event
)
437 ret
= ustctl_disable(app
->key
.sock
, ua_event
->obj
);
439 ERR("UST app event %s disable failed for app (pid: %d) "
440 "and session handle %d with ret %d",
441 ua_event
->attr
.name
, app
->key
.pid
, ua_sess
->handle
, ret
);
445 DBG2("UST app event %s disabled successfully for app (pid: %d)",
446 ua_event
->attr
.name
, app
->key
.pid
);
453 * Disable the specified channel on to UST tracer for the UST session.
455 static int disable_ust_channel(struct ust_app
*app
,
456 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
460 ret
= ustctl_disable(app
->key
.sock
, ua_chan
->obj
);
462 ERR("UST app channel %s disable failed for app (pid: %d) "
463 "and session handle %d with ret %d",
464 ua_chan
->name
, app
->key
.pid
, ua_sess
->handle
, ret
);
468 DBG2("UST app channel %s disabled successfully for app (pid: %d)",
469 ua_chan
->name
, app
->key
.pid
);
476 * Enable the specified channel on to UST tracer for the UST session.
478 static int enable_ust_channel(struct ust_app
*app
,
479 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
483 ret
= ustctl_enable(app
->key
.sock
, ua_chan
->obj
);
485 ERR("UST app channel %s enable failed for app (pid: %d) "
486 "and session handle %d with ret %d",
487 ua_chan
->name
, app
->key
.pid
, ua_sess
->handle
, ret
);
491 ua_chan
->enabled
= 1;
493 DBG2("UST app channel %s enabled successfully for app (pid: %d)",
494 ua_chan
->name
, app
->key
.pid
);
501 * Enable the specified event on to UST tracer for the UST session.
503 static int enable_ust_event(struct ust_app
*app
,
504 struct ust_app_session
*ua_sess
, struct ust_app_event
*ua_event
)
508 ret
= ustctl_enable(app
->key
.sock
, ua_event
->obj
);
510 ERR("UST app event %s enable failed for app (pid: %d) "
511 "and session handle %d with ret %d",
512 ua_event
->attr
.name
, app
->key
.pid
, ua_sess
->handle
, ret
);
516 DBG2("UST app event %s enabled successfully for app (pid: %d)",
517 ua_event
->attr
.name
, app
->key
.pid
);
524 * Open metadata onto the UST tracer for a UST session.
526 static int open_ust_metadata(struct ust_app
*app
,
527 struct ust_app_session
*ua_sess
)
530 struct lttng_ust_channel_attr uattr
;
532 uattr
.overwrite
= ua_sess
->metadata
->attr
.overwrite
;
533 uattr
.subbuf_size
= ua_sess
->metadata
->attr
.subbuf_size
;
534 uattr
.num_subbuf
= ua_sess
->metadata
->attr
.num_subbuf
;
535 uattr
.switch_timer_interval
=
536 ua_sess
->metadata
->attr
.switch_timer_interval
;
537 uattr
.read_timer_interval
=
538 ua_sess
->metadata
->attr
.read_timer_interval
;
539 uattr
.output
= ua_sess
->metadata
->attr
.output
;
541 /* UST tracer metadata creation */
542 ret
= ustctl_open_metadata(app
->key
.sock
, ua_sess
->handle
, &uattr
,
543 &ua_sess
->metadata
->obj
);
545 ERR("UST app open metadata failed for app pid:%d",
550 ua_sess
->metadata
->handle
= ua_sess
->metadata
->obj
->handle
;
557 * Create stream onto the UST tracer for a UST session.
559 static int create_ust_stream(struct ust_app
*app
,
560 struct ust_app_session
*ua_sess
)
564 ret
= ustctl_create_stream(app
->key
.sock
, ua_sess
->metadata
->obj
,
565 &ua_sess
->metadata
->stream_obj
);
567 ERR("UST create metadata stream failed");
576 * Create the specified channel onto the UST tracer for a UST session.
578 static int create_ust_channel(struct ust_app
*app
,
579 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
583 /* TODO: remove cast and use lttng-ust-abi.h */
584 ret
= ustctl_create_channel(app
->key
.sock
, ua_sess
->handle
,
585 (struct lttng_ust_channel_attr
*)&ua_chan
->attr
, &ua_chan
->obj
);
587 DBG("Error creating channel %s for app (pid: %d, sock: %d) "
588 "and session handle %d with ret %d",
589 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
,
590 ua_sess
->handle
, ret
);
594 ua_chan
->handle
= ua_chan
->obj
->handle
;
595 ua_chan
->attr
.shm_fd
= ua_chan
->obj
->shm_fd
;
596 ua_chan
->attr
.wait_fd
= ua_chan
->obj
->wait_fd
;
597 ua_chan
->attr
.memory_map_size
= ua_chan
->obj
->memory_map_size
;
599 DBG2("UST app channel %s created successfully for pid:%d and sock:%d",
600 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
);
602 /* If channel is not enabled, disable it on the tracer */
603 if (!ua_chan
->enabled
) {
604 ret
= disable_ust_channel(app
, ua_sess
, ua_chan
);
615 * Create the specified event onto the UST tracer for a UST session.
618 int create_ust_event(struct ust_app
*app
, struct ust_app_session
*ua_sess
,
619 struct ust_app_channel
*ua_chan
, struct ust_app_event
*ua_event
)
623 /* Create UST event on tracer */
624 ret
= ustctl_create_event(app
->key
.sock
, &ua_event
->attr
, ua_chan
->obj
,
627 ERR("Error ustctl create event %s for app pid: %d with ret %d",
628 ua_event
->attr
.name
, app
->key
.pid
, ret
);
632 ua_event
->handle
= ua_event
->obj
->handle
;
634 DBG2("UST app event %s created successfully for pid:%d",
635 ua_event
->attr
.name
, app
->key
.pid
);
637 /* If event not enabled, disable it on the tracer */
638 if (!ua_event
->enabled
) {
639 ret
= disable_ust_event(app
, ua_sess
, ua_event
);
650 * Copy data between an UST app event and a LTT event.
652 static void shadow_copy_event(struct ust_app_event
*ua_event
,
653 struct ltt_ust_event
*uevent
)
655 struct lttng_ht_iter iter
;
656 struct ltt_ust_context
*uctx
;
657 struct ust_app_ctx
*ua_ctx
;
659 strncpy(ua_event
->name
, uevent
->attr
.name
, sizeof(ua_event
->name
));
660 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
662 /* Copy event attributes */
663 memcpy(&ua_event
->attr
, &uevent
->attr
, sizeof(ua_event
->attr
));
665 cds_lfht_for_each_entry(uevent
->ctx
->ht
, &iter
.iter
, uctx
, node
.node
) {
666 ua_ctx
= alloc_ust_app_ctx(&uctx
->ctx
);
667 if (ua_ctx
== NULL
) {
670 lttng_ht_node_init_ulong(&ua_ctx
->node
,
671 (unsigned long) ua_ctx
->ctx
.ctx
);
672 lttng_ht_add_unique_ulong(ua_event
->ctx
, &ua_ctx
->node
);
677 * Copy data between an UST app channel and a LTT channel.
679 static void shadow_copy_channel(struct ust_app_channel
*ua_chan
,
680 struct ltt_ust_channel
*uchan
)
682 struct lttng_ht_iter iter
;
683 struct lttng_ht_node_str
*ua_event_node
;
684 struct ltt_ust_event
*uevent
;
685 struct ltt_ust_context
*uctx
;
686 struct ust_app_event
*ua_event
;
687 struct ust_app_ctx
*ua_ctx
;
689 DBG2("Shadow copy of UST app channel %s", ua_chan
->name
);
691 strncpy(ua_chan
->name
, uchan
->name
, sizeof(ua_chan
->name
));
692 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
693 /* Copy event attributes */
694 memcpy(&ua_chan
->attr
, &uchan
->attr
, sizeof(ua_chan
->attr
));
696 cds_lfht_for_each_entry(uchan
->ctx
->ht
, &iter
.iter
, uctx
, node
.node
) {
697 ua_ctx
= alloc_ust_app_ctx(&uctx
->ctx
);
698 if (ua_ctx
== NULL
) {
701 lttng_ht_node_init_ulong(&ua_ctx
->node
,
702 (unsigned long) ua_ctx
->ctx
.ctx
);
703 lttng_ht_add_unique_ulong(ua_chan
->ctx
, &ua_ctx
->node
);
706 /* Copy all events from ltt ust channel to ust app channel */
707 cds_lfht_for_each_entry(uchan
->events
->ht
, &iter
.iter
, uevent
, node
.node
) {
708 struct lttng_ht_iter uiter
;
710 lttng_ht_lookup(ua_chan
->events
, (void *) uevent
->attr
.name
, &uiter
);
711 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
712 if (ua_event_node
== NULL
) {
713 DBG2("UST event %s not found on shadow copy channel",
715 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
716 if (ua_event
== NULL
) {
719 shadow_copy_event(ua_event
, uevent
);
720 lttng_ht_add_unique_str(ua_chan
->events
, &ua_event
->node
);
724 DBG3("Shadow copy channel done");
728 * Copy data between a UST app session and a regular LTT session.
730 static void shadow_copy_session(struct ust_app_session
*ua_sess
,
731 struct ltt_ust_session
*usess
, struct ust_app
*app
)
733 struct lttng_ht_node_str
*ua_chan_node
;
734 struct lttng_ht_iter iter
;
735 struct ltt_ust_channel
*uchan
;
736 struct ust_app_channel
*ua_chan
;
742 /* Get date and time for unique app path */
744 timeinfo
= localtime(&rawtime
);
745 strftime(datetime
, sizeof(datetime
), "%Y%m%d-%H%M%S", timeinfo
);
747 DBG2("Shadow copy of session handle %d", ua_sess
->handle
);
749 ua_sess
->id
= usess
->id
;
750 ua_sess
->uid
= usess
->uid
;
751 ua_sess
->gid
= usess
->gid
;
753 ret
= snprintf(ua_sess
->path
, PATH_MAX
,
755 usess
->pathname
, app
->name
, app
->key
.pid
,
758 PERROR("asprintf UST shadow copy session");
759 /* TODO: We cannot return an error from here.. */
763 /* TODO: support all UST domain */
765 /* Iterate over all channels in global domain. */
766 cds_lfht_for_each_entry(usess
->domain_global
.channels
->ht
, &iter
.iter
,
768 struct lttng_ht_iter uiter
;
770 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
771 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
772 if (ua_chan_node
!= NULL
) {
776 DBG2("Channel %s not found on shadow session copy, creating it",
778 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
779 if (ua_chan
== NULL
) {
780 /* malloc failed... continuing */
784 shadow_copy_channel(ua_chan
, uchan
);
785 lttng_ht_add_unique_str(ua_sess
->channels
, &ua_chan
->node
);
790 * Lookup sesison wrapper.
793 void __lookup_session_by_app(struct ltt_ust_session
*usess
,
794 struct ust_app
*app
, struct lttng_ht_iter
*iter
)
796 /* Get right UST app session from app */
797 lttng_ht_lookup(app
->sessions
, (void *)((unsigned long) usess
->id
), iter
);
801 * Return ust app session from the app session hashtable using the UST session
804 static struct ust_app_session
*lookup_session_by_app(
805 struct ltt_ust_session
*usess
, struct ust_app
*app
)
807 struct lttng_ht_iter iter
;
808 struct lttng_ht_node_ulong
*node
;
810 __lookup_session_by_app(usess
, app
, &iter
);
811 node
= lttng_ht_iter_get_node_ulong(&iter
);
816 return caa_container_of(node
, struct ust_app_session
, node
);
823 * Create a UST session onto the tracer of app and add it the session
826 * Return ust app session or NULL on error.
828 static struct ust_app_session
*create_ust_app_session(
829 struct ltt_ust_session
*usess
, struct ust_app
*app
)
832 struct ust_app_session
*ua_sess
;
834 ua_sess
= lookup_session_by_app(usess
, app
);
835 if (ua_sess
== NULL
) {
836 DBG2("UST app pid: %d session id %d not found, creating it",
837 app
->key
.pid
, usess
->id
);
838 ua_sess
= alloc_ust_app_session();
839 if (ua_sess
== NULL
) {
840 /* Only malloc can failed so something is really wrong */
843 shadow_copy_session(ua_sess
, usess
, app
);
846 if (ua_sess
->handle
== -1) {
847 ret
= ustctl_create_session(app
->key
.sock
);
849 ERR("Error creating session for app pid %d, sock %d",
850 app
->key
.pid
, app
->key
.sock
);
851 /* TODO: free() ua_sess */
855 DBG2("UST app ustctl create session handle %d", ret
);
856 ua_sess
->handle
= ret
;
858 /* Add ust app session to app's HT */
859 lttng_ht_node_init_ulong(&ua_sess
->node
, (unsigned long) ua_sess
->id
);
860 lttng_ht_add_unique_ulong(app
->sessions
, &ua_sess
->node
);
862 DBG2("UST app session created successfully with handle %d", ret
);
872 * Create a context for the channel on the tracer.
875 int create_ust_app_channel_context(struct ust_app_session
*ua_sess
,
876 struct ust_app_channel
*ua_chan
, struct lttng_ust_context
*uctx
,
880 struct lttng_ht_iter iter
;
881 struct lttng_ht_node_ulong
*node
;
882 struct ust_app_ctx
*ua_ctx
;
884 DBG2("UST app adding context to channel %s", ua_chan
->name
);
886 lttng_ht_lookup(ua_chan
->ctx
, (void *)((unsigned long)uctx
->ctx
), &iter
);
887 node
= lttng_ht_iter_get_node_ulong(&iter
);
893 ua_ctx
= alloc_ust_app_ctx(uctx
);
894 if (ua_ctx
== NULL
) {
900 lttng_ht_node_init_ulong(&ua_ctx
->node
, (unsigned long) ua_ctx
->ctx
.ctx
);
901 lttng_ht_add_unique_ulong(ua_chan
->ctx
, &ua_ctx
->node
);
903 ret
= create_ust_channel_context(ua_chan
, ua_ctx
, app
);
913 * Create an UST context and enable it for the event on the tracer.
916 int create_ust_app_event_context(struct ust_app_session
*ua_sess
,
917 struct ust_app_event
*ua_event
, struct lttng_ust_context
*uctx
,
921 struct lttng_ht_iter iter
;
922 struct lttng_ht_node_ulong
*node
;
923 struct ust_app_ctx
*ua_ctx
;
925 DBG2("UST app adding context to event %s", ua_event
->name
);
927 lttng_ht_lookup(ua_event
->ctx
, (void *)((unsigned long)uctx
->ctx
), &iter
);
928 node
= lttng_ht_iter_get_node_ulong(&iter
);
934 ua_ctx
= alloc_ust_app_ctx(uctx
);
935 if (ua_ctx
== NULL
) {
941 lttng_ht_node_init_ulong(&ua_ctx
->node
, (unsigned long) ua_ctx
->ctx
.ctx
);
942 lttng_ht_add_unique_ulong(ua_event
->ctx
, &ua_ctx
->node
);
944 ret
= create_ust_event_context(ua_event
, ua_ctx
, app
);
954 * Enable on the tracer side a ust app event for the session and channel.
957 int enable_ust_app_event(struct ust_app_session
*ua_sess
,
958 struct ust_app_event
*ua_event
, struct ust_app
*app
)
962 ret
= enable_ust_event(app
, ua_sess
, ua_event
);
967 ua_event
->enabled
= 1;
974 * Disable on the tracer side a ust app event for the session and channel.
976 static int disable_ust_app_event(struct ust_app_session
*ua_sess
,
977 struct ust_app_event
*ua_event
, struct ust_app
*app
)
981 ret
= disable_ust_event(app
, ua_sess
, ua_event
);
986 ua_event
->enabled
= 0;
993 * Lookup ust app channel for session and disable it on the tracer side.
996 int disable_ust_app_channel(struct ust_app_session
*ua_sess
,
997 struct ust_app_channel
*ua_chan
, struct ust_app
*app
)
1001 ret
= disable_ust_channel(app
, ua_sess
, ua_chan
);
1006 ua_chan
->enabled
= 0;
1013 * Lookup ust app channel for session and enable it on the tracer side.
1015 static int enable_ust_app_channel(struct ust_app_session
*ua_sess
,
1016 struct ltt_ust_channel
*uchan
, struct ust_app
*app
)
1019 struct lttng_ht_iter iter
;
1020 struct lttng_ht_node_str
*ua_chan_node
;
1021 struct ust_app_channel
*ua_chan
;
1023 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
1024 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
1025 if (ua_chan_node
== NULL
) {
1026 DBG2("Unable to find channel %s in ust session id %u",
1027 uchan
->name
, ua_sess
->id
);
1031 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1033 ret
= enable_ust_channel(app
, ua_sess
, ua_chan
);
1043 * Create UST app channel and create it on the tracer.
1045 static struct ust_app_channel
*create_ust_app_channel(
1046 struct ust_app_session
*ua_sess
, struct ltt_ust_channel
*uchan
,
1047 struct ust_app
*app
)
1050 struct lttng_ht_iter iter
;
1051 struct lttng_ht_node_str
*ua_chan_node
;
1052 struct ust_app_channel
*ua_chan
;
1054 /* Lookup channel in the ust app session */
1055 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
1056 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
1057 if (ua_chan_node
== NULL
) {
1058 DBG2("Unable to find channel %s in ust session id %u",
1059 uchan
->name
, ua_sess
->id
);
1060 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
1061 if (ua_chan
== NULL
) {
1064 shadow_copy_channel(ua_chan
, uchan
);
1066 lttng_ht_add_unique_str(ua_sess
->channels
, &ua_chan
->node
);
1068 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1071 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
1083 * Create UST app event and create it on the tracer side.
1086 int create_ust_app_event(struct ust_app_session
*ua_sess
,
1087 struct ust_app_channel
*ua_chan
, struct ltt_ust_event
*uevent
,
1088 struct ust_app
*app
)
1091 struct lttng_ht_iter iter
;
1092 struct lttng_ht_node_str
*ua_event_node
;
1093 struct ust_app_event
*ua_event
;
1095 /* Get event node */
1096 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &iter
);
1097 ua_event_node
= lttng_ht_iter_get_node_str(&iter
);
1098 if (ua_event_node
!= NULL
) {
1099 ERR("UST app event %s already exist. Stopping creation.",
1104 /* Does not exist so create one */
1105 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
1106 if (ua_event
== NULL
) {
1107 /* Only malloc can failed so something is really wrong */
1111 shadow_copy_event(ua_event
, uevent
);
1113 /* Create it on the tracer side */
1114 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
1117 delete_ust_app_event(app
->key
.sock
, ua_event
);
1122 ua_event
->enabled
= 1;
1124 lttng_ht_add_unique_str(ua_chan
->events
, &ua_event
->node
);
1126 DBG2("UST app create event %s for PID %d completed",
1127 ua_event
->name
, app
->key
.pid
);
1135 * Create UST metadata and open it on the tracer side.
1137 static int create_ust_app_metadata(struct ust_app_session
*ua_sess
,
1138 char *pathname
, struct ust_app
*app
)
1142 if (ua_sess
->metadata
== NULL
) {
1143 /* Allocate UST metadata */
1144 ua_sess
->metadata
= trace_ust_create_metadata(pathname
);
1145 if (ua_sess
->metadata
== NULL
) {
1146 ERR("UST app session %d creating metadata failed",
1151 ret
= open_ust_metadata(app
, ua_sess
);
1156 DBG2("UST metadata opened for app pid %d", app
->key
.pid
);
1159 /* Open UST metadata stream */
1160 if (ua_sess
->metadata
->stream_obj
== NULL
) {
1161 ret
= create_ust_stream(app
, ua_sess
);
1166 ret
= mkdir_run_as(ua_sess
->path
, S_IRWXU
| S_IRWXG
,
1167 ua_sess
->uid
, ua_sess
->gid
);
1169 PERROR("mkdir UST metadata");
1173 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
,
1174 "%s/metadata", ua_sess
->path
);
1176 PERROR("asprintf UST create stream");
1180 DBG2("UST metadata stream object created for app pid %d",
1183 ERR("Attempting to create stream without metadata opened");
1194 * Return pointer to traceable apps list.
1196 struct lttng_ht
*ust_app_get_ht(void)
1202 * Return ust app pointer or NULL if not found.
1204 struct ust_app
*ust_app_find_by_pid(pid_t pid
)
1206 struct lttng_ht_node_ulong
*node
;
1207 struct lttng_ht_iter iter
;
1210 lttng_ht_lookup(ust_app_ht
, (void *)((unsigned long) pid
), &iter
);
1211 node
= lttng_ht_iter_get_node_ulong(&iter
);
1213 DBG2("UST app no found with pid %d", pid
);
1218 DBG2("Found UST app by pid %d", pid
);
1220 return caa_container_of(node
, struct ust_app
, node
);
1228 * Using pid and uid (of the app), allocate a new ust_app struct and
1229 * add it to the global traceable app list.
1231 * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app
1232 * bitness is not supported.
1234 int ust_app_register(struct ust_register_msg
*msg
, int sock
)
1236 struct ust_app
*lta
;
1238 if ((msg
->bits_per_long
== 64 && ust_consumerd64_fd
== -EINVAL
)
1239 || (msg
->bits_per_long
== 32 && ust_consumerd32_fd
== -EINVAL
)) {
1240 ERR("Registration failed: application \"%s\" (pid: %d) has "
1241 "%d-bit long, but no consumerd for this long size is available.\n",
1242 msg
->name
, msg
->pid
, msg
->bits_per_long
);
1246 lta
= zmalloc(sizeof(struct ust_app
));
1252 lta
->ppid
= msg
->ppid
;
1253 lta
->uid
= msg
->uid
;
1254 lta
->gid
= msg
->gid
;
1255 lta
->bits_per_long
= msg
->bits_per_long
;
1256 lta
->v_major
= msg
->major
;
1257 lta
->v_minor
= msg
->minor
;
1258 strncpy(lta
->name
, msg
->name
, sizeof(lta
->name
));
1259 lta
->name
[16] = '\0';
1260 lta
->sessions
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
1263 lta
->key
.pid
= msg
->pid
;
1264 lttng_ht_node_init_ulong(<a
->node
, (unsigned long)lta
->key
.pid
);
1265 lta
->key
.sock
= sock
;
1266 lttng_ht_node_init_ulong(<a
->key
.node
, (unsigned long)lta
->key
.sock
);
1269 lttng_ht_add_unique_ulong(ust_app_sock_key_map
, <a
->key
.node
);
1270 lttng_ht_add_unique_ulong(ust_app_ht
, <a
->node
);
1273 DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s"
1274 " (version %d.%d)", lta
->key
.pid
, lta
->ppid
, lta
->uid
, lta
->gid
,
1275 lta
->key
.sock
, lta
->name
, lta
->v_major
, lta
->v_minor
);
1281 * Unregister app by removing it from the global traceable app list and freeing
1284 * The socket is already closed at this point so no close to sock.
1286 void ust_app_unregister(int sock
)
1288 struct ust_app
*lta
;
1289 struct lttng_ht_node_ulong
*node
;
1290 struct lttng_ht_iter iter
;
1294 lta
= find_app_by_sock(sock
);
1296 ERR("Unregister app sock %d not found!", sock
);
1300 DBG("PID %d unregistering with sock %d", lta
->key
.pid
, sock
);
1302 /* Remove application from socket hash table */
1303 lttng_ht_lookup(ust_app_sock_key_map
, (void *)((unsigned long) sock
), &iter
);
1304 ret
= lttng_ht_del(ust_app_sock_key_map
, &iter
);
1307 /* Get the node reference for a call_rcu */
1308 lttng_ht_lookup(ust_app_ht
, (void *)((unsigned long) lta
->key
.pid
), &iter
);
1309 node
= lttng_ht_iter_get_node_ulong(&iter
);
1311 ERR("Unable to find app sock %d by pid %d", sock
, lta
->key
.pid
);
1315 /* Remove application from PID hash table */
1316 ret
= lttng_ht_del(ust_app_ht
, &iter
);
1318 call_rcu(&node
->head
, delete_ust_app_rcu
);
1325 * Return traceable_app_count
1327 unsigned long ust_app_list_count(void)
1329 unsigned long count
;
1332 count
= lttng_ht_get_count(ust_app_ht
);
1339 * Fill events array with all events name of all registered apps.
1341 int ust_app_list_events(struct lttng_event
**events
)
1344 size_t nbmem
, count
= 0;
1345 struct lttng_ht_iter iter
;
1346 struct ust_app
*app
;
1347 struct lttng_event
*tmp
;
1349 nbmem
= UST_APP_EVENT_LIST_SIZE
;
1350 tmp
= zmalloc(nbmem
* sizeof(struct lttng_event
));
1352 PERROR("zmalloc ust app events");
1359 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
1360 struct lttng_ust_tracepoint_iter uiter
;
1362 handle
= ustctl_tracepoint_list(app
->key
.sock
);
1364 ERR("UST app list events getting handle failed for app pid %d",
1369 while ((ret
= ustctl_tracepoint_list_get(app
->key
.sock
, handle
,
1370 &uiter
)) != -ENOENT
) {
1371 if (count
>= nbmem
) {
1372 DBG2("Reallocating event list from %zu to %zu entries", nbmem
,
1375 tmp
= realloc(tmp
, nbmem
* sizeof(struct lttng_event
));
1377 PERROR("realloc ust app events");
1382 memcpy(tmp
[count
].name
, uiter
.name
, LTTNG_UST_SYM_NAME_LEN
);
1383 memcpy(tmp
[count
].loglevel
, uiter
.loglevel
, LTTNG_UST_SYM_NAME_LEN
);
1384 tmp
[count
].loglevel_value
= uiter
.loglevel_value
;
1385 tmp
[count
].type
= LTTNG_UST_TRACEPOINT
;
1386 tmp
[count
].pid
= app
->key
.pid
;
1387 tmp
[count
].enabled
= -1;
1395 DBG2("UST app list events done (%zu events)", count
);
1404 * Free and clean all traceable apps of the global list.
1406 void ust_app_clean_list(void)
1409 struct lttng_ht_iter iter
;
1410 struct lttng_ht_node_ulong
*node
;
1412 DBG2("UST app cleaning registered apps hash table");
1416 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, node
, node
) {
1417 ret
= lttng_ht_del(ust_app_ht
, &iter
);
1419 call_rcu(&node
->head
, delete_ust_app_rcu
);
1421 /* Destroy is done only when the ht is empty */
1422 lttng_ht_destroy(ust_app_ht
);
1424 cds_lfht_for_each_entry(ust_app_sock_key_map
->ht
, &iter
.iter
, node
, node
) {
1425 ret
= lttng_ht_del(ust_app_sock_key_map
, &iter
);
1428 /* Destroy is done only when the ht is empty */
1429 lttng_ht_destroy(ust_app_sock_key_map
);
1435 * Init UST app hash table.
1437 void ust_app_ht_alloc(void)
1439 ust_app_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
1440 ust_app_sock_key_map
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
1444 * For a specific UST session, disable the channel for all registered apps.
1446 int ust_app_disable_channel_glb(struct ltt_ust_session
*usess
,
1447 struct ltt_ust_channel
*uchan
)
1450 struct lttng_ht_iter iter
;
1451 struct lttng_ht_node_str
*ua_chan_node
;
1452 struct ust_app
*app
;
1453 struct ust_app_session
*ua_sess
;
1454 struct ust_app_channel
*ua_chan
;
1456 if (usess
== NULL
|| uchan
== NULL
) {
1457 ERR("Disabling UST global channel with NULL values");
1462 DBG2("UST app disabling channel %s from global domain for session id %d",
1463 uchan
->name
, usess
->id
);
1467 /* For every registered applications */
1468 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
1469 struct lttng_ht_iter uiter
;
1470 ua_sess
= lookup_session_by_app(usess
, app
);
1471 if (ua_sess
== NULL
) {
1476 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1477 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1478 /* If the session if found for the app, the channel must be there */
1479 assert(ua_chan_node
);
1481 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1482 /* The channel must not be already disabled */
1483 assert(ua_chan
->enabled
== 1);
1485 /* Disable channel onto application */
1486 ret
= disable_ust_app_channel(ua_sess
, ua_chan
, app
);
1488 /* XXX: We might want to report this error at some point... */
1500 * For a specific UST session, enable the channel for all registered apps.
1502 int ust_app_enable_channel_glb(struct ltt_ust_session
*usess
,
1503 struct ltt_ust_channel
*uchan
)
1506 struct lttng_ht_iter iter
;
1507 struct ust_app
*app
;
1508 struct ust_app_session
*ua_sess
;
1510 if (usess
== NULL
|| uchan
== NULL
) {
1511 ERR("Adding UST global channel to NULL values");
1516 DBG2("UST app enabling channel %s to global domain for session id %d",
1517 uchan
->name
, usess
->id
);
1521 /* For every registered applications */
1522 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
1523 ua_sess
= lookup_session_by_app(usess
, app
);
1524 if (ua_sess
== NULL
) {
1528 /* Enable channel onto application */
1529 ret
= enable_ust_app_channel(ua_sess
, uchan
, app
);
1531 /* XXX: We might want to report this error at some point... */
1543 * Disable an event in a channel and for a specific session.
1545 int ust_app_disable_event_glb(struct ltt_ust_session
*usess
,
1546 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1549 struct lttng_ht_iter iter
, uiter
;
1550 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
1551 struct ust_app
*app
;
1552 struct ust_app_session
*ua_sess
;
1553 struct ust_app_channel
*ua_chan
;
1554 struct ust_app_event
*ua_event
;
1556 DBG("UST app disabling event %s for all apps in channel "
1557 "%s for session id %d", uevent
->attr
.name
, uchan
->name
, usess
->id
);
1561 /* For all registered applications */
1562 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
1563 ua_sess
= lookup_session_by_app(usess
, app
);
1564 if (ua_sess
== NULL
) {
1569 /* Lookup channel in the ust app session */
1570 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1571 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1572 if (ua_chan_node
== NULL
) {
1573 DBG2("Channel %s not found in session id %d for app pid %d."
1574 "Skipping", uchan
->name
, usess
->id
, app
->key
.pid
);
1577 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1579 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &uiter
);
1580 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
1581 if (ua_event_node
== NULL
) {
1582 DBG2("Event %s not found in channel %s for app pid %d."
1583 "Skipping", uevent
->attr
.name
, uchan
->name
, app
->key
.pid
);
1586 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
1588 ret
= disable_ust_app_event(ua_sess
, ua_event
, app
);
1590 /* XXX: Report error someday... */
1601 * For a specific UST session and UST channel, the event for all
1604 int ust_app_disable_all_event_glb(struct ltt_ust_session
*usess
,
1605 struct ltt_ust_channel
*uchan
)
1608 struct lttng_ht_iter iter
, uiter
;
1609 struct lttng_ht_node_str
*ua_chan_node
;
1610 struct ust_app
*app
;
1611 struct ust_app_session
*ua_sess
;
1612 struct ust_app_channel
*ua_chan
;
1613 struct ust_app_event
*ua_event
;
1615 DBG("UST app disabling all event for all apps in channel "
1616 "%s for session id %d", uchan
->name
, usess
->id
);
1620 /* For all registered applications */
1621 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
1622 ua_sess
= lookup_session_by_app(usess
, app
);
1623 /* If ua_sess is NULL, there is a code flow error */
1626 /* Lookup channel in the ust app session */
1627 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1628 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1629 /* If the channel is not found, there is a code flow error */
1630 assert(ua_chan_node
);
1632 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1634 /* Disable each events of channel */
1635 cds_lfht_for_each_entry(ua_chan
->events
->ht
, &uiter
.iter
, ua_event
,
1637 ret
= disable_ust_app_event(ua_sess
, ua_event
, app
);
1639 /* XXX: Report error someday... */
1651 * For a specific UST session, create the channel for all registered apps.
1653 int ust_app_create_channel_glb(struct ltt_ust_session
*usess
,
1654 struct ltt_ust_channel
*uchan
)
1657 struct lttng_ht_iter iter
;
1658 struct ust_app
*app
;
1659 struct ust_app_session
*ua_sess
;
1660 struct ust_app_channel
*ua_chan
;
1662 if (usess
== NULL
|| uchan
== NULL
) {
1663 ERR("Adding UST global channel to NULL values");
1668 DBG2("UST app adding channel %s to global domain for session id %d",
1669 uchan
->name
, usess
->id
);
1673 /* For every registered applications */
1674 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
1676 * Create session on the tracer side and add it to app session HT. Note
1677 * that if session exist, it will simply return a pointer to the ust
1680 ua_sess
= create_ust_app_session(usess
, app
);
1681 if (ua_sess
== NULL
) {
1685 /* Create channel onto application */
1686 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
1687 if (ua_chan
== NULL
) {
1699 * Enable event for a specific session and channel on the tracer.
1701 int ust_app_enable_event_glb(struct ltt_ust_session
*usess
,
1702 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1705 struct lttng_ht_iter iter
, uiter
;
1706 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
1707 struct ust_app
*app
;
1708 struct ust_app_session
*ua_sess
;
1709 struct ust_app_channel
*ua_chan
;
1710 struct ust_app_event
*ua_event
;
1712 DBG("UST app enabling event %s for all apps for session id %d",
1713 uevent
->attr
.name
, usess
->id
);
1716 * NOTE: At this point, this function is called only if the session and
1717 * channel passed are already created for all apps. and enabled on the
1723 /* For all registered applications */
1724 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
1725 ua_sess
= lookup_session_by_app(usess
, app
);
1726 /* If ua_sess is NULL, there is a code flow error */
1729 /* Lookup channel in the ust app session */
1730 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1731 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1732 /* If the channel is not found, there is a code flow error */
1733 assert(ua_chan_node
);
1735 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1737 lttng_ht_lookup(ua_chan
->events
, (void*)uevent
->attr
.name
, &uiter
);
1738 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
1739 if (ua_event_node
== NULL
) {
1740 DBG3("UST app enable event %s not found for app PID %d."
1741 "Skipping app", uevent
->attr
.name
, app
->key
.pid
);
1744 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
1746 ret
= enable_ust_app_event(ua_sess
, ua_event
, app
);
1758 * For a specific existing UST session and UST channel, creates the event for
1759 * all registered apps.
1761 int ust_app_create_event_glb(struct ltt_ust_session
*usess
,
1762 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1765 struct lttng_ht_iter iter
, uiter
;
1766 struct lttng_ht_node_str
*ua_chan_node
;
1767 struct ust_app
*app
;
1768 struct ust_app_session
*ua_sess
;
1769 struct ust_app_channel
*ua_chan
;
1771 DBG("UST app creating event %s for all apps for session id %d",
1772 uevent
->attr
.name
, usess
->id
);
1775 * NOTE: At this point, this function is called only if the session and
1776 * channel passed are already created for all apps. and enabled on the
1782 /* For all registered applications */
1783 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
1784 ua_sess
= lookup_session_by_app(usess
, app
);
1785 /* If ua_sess is NULL, there is a code flow error */
1788 /* Lookup channel in the ust app session */
1789 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1790 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1791 /* If the channel is not found, there is a code flow error */
1792 assert(ua_chan_node
);
1794 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1796 ret
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
1808 * Start tracing for a specific UST session and app.
1810 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1813 struct lttng_ht_iter iter
;
1814 struct ust_app_session
*ua_sess
;
1815 struct ust_app_channel
*ua_chan
;
1816 struct ltt_ust_stream
*ustream
;
1819 DBG("Starting tracing for ust app pid %d", app
->key
.pid
);
1823 ua_sess
= lookup_session_by_app(usess
, app
);
1824 if (ua_sess
== NULL
) {
1825 goto error_rcu_unlock
;
1828 /* Upon restart, we skip the setup, already done */
1829 if (ua_sess
->started
) {
1833 ret
= create_ust_app_metadata(ua_sess
, usess
->pathname
, app
);
1835 goto error_rcu_unlock
;
1838 /* For each channel */
1839 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
1841 /* Create all streams */
1843 /* Create UST stream */
1844 ustream
= zmalloc(sizeof(*ustream
));
1845 if (ustream
== NULL
) {
1846 PERROR("zmalloc ust stream");
1847 goto error_rcu_unlock
;
1850 ret
= ustctl_create_stream(app
->key
.sock
, ua_chan
->obj
,
1853 /* Got all streams */
1856 ustream
->handle
= ustream
->obj
->handle
;
1858 /* Order is important */
1859 cds_list_add_tail(&ustream
->list
, &ua_chan
->streams
.head
);
1860 ret
= snprintf(ustream
->pathname
, PATH_MAX
, "%s/%s_%u",
1861 ua_sess
->path
, ua_chan
->name
,
1862 ua_chan
->streams
.count
++);
1864 PERROR("asprintf UST create stream");
1867 DBG2("UST stream %d ready at %s", ua_chan
->streams
.count
,
1872 switch (app
->bits_per_long
) {
1874 consumerd_fd
= ust_consumerd64_fd
;
1877 consumerd_fd
= ust_consumerd32_fd
;
1881 goto error_rcu_unlock
;
1884 /* Setup UST consumer socket and send fds to it */
1885 ret
= ust_consumer_send_session(consumerd_fd
, ua_sess
);
1887 goto error_rcu_unlock
;
1889 ua_sess
->started
= 1;
1892 /* This start the UST tracing */
1893 ret
= ustctl_start_session(app
->key
.sock
, ua_sess
->handle
);
1895 ERR("Error starting tracing for app pid: %d", app
->key
.pid
);
1896 goto error_rcu_unlock
;
1901 /* Quiescent wait after starting trace */
1902 ustctl_wait_quiescent(app
->key
.sock
);
1912 * Stop tracing for a specific UST session and app.
1914 int ust_app_stop_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1917 struct lttng_ht_iter iter
;
1918 struct ust_app_session
*ua_sess
;
1919 struct ust_app_channel
*ua_chan
;
1921 DBG("Stopping tracing for ust app pid %d", app
->key
.pid
);
1925 ua_sess
= lookup_session_by_app(usess
, app
);
1926 if (ua_sess
== NULL
) {
1927 /* Only malloc can failed so something is really wrong */
1928 goto error_rcu_unlock
;
1931 /* This inhibits UST tracing */
1932 ret
= ustctl_stop_session(app
->key
.sock
, ua_sess
->handle
);
1934 ERR("Error stopping tracing for app pid: %d", app
->key
.pid
);
1935 goto error_rcu_unlock
;
1938 /* Quiescent wait after stopping trace */
1939 ustctl_wait_quiescent(app
->key
.sock
);
1941 /* Flushing buffers */
1942 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
1944 ret
= ustctl_sock_flush_buffer(app
->key
.sock
, ua_chan
->obj
);
1946 ERR("UST app PID %d channel %s flush failed",
1947 app
->key
.pid
, ua_chan
->name
);
1948 ERR("Ended with ret %d", ret
);
1949 /* Continuing flushing all buffers */
1954 /* Flush all buffers before stopping */
1955 ret
= ustctl_sock_flush_buffer(app
->key
.sock
, ua_sess
->metadata
->obj
);
1957 ERR("UST app PID %d metadata flush failed", app
->key
.pid
);
1958 ERR("Ended with ret %d", ret
);
1971 * Destroy a specific UST session in apps.
1973 int ust_app_destroy_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1975 struct ust_app_session
*ua_sess
;
1976 struct lttng_ust_object_data obj
;
1977 struct lttng_ht_iter iter
;
1978 struct lttng_ht_node_ulong
*node
;
1981 DBG("Destroy tracing for ust app pid %d", app
->key
.pid
);
1985 __lookup_session_by_app(usess
, app
, &iter
);
1986 node
= lttng_ht_iter_get_node_ulong(&iter
);
1988 /* Only malloc can failed so something is really wrong */
1989 goto error_rcu_unlock
;
1991 ua_sess
= caa_container_of(node
, struct ust_app_session
, node
);
1992 ret
= lttng_ht_del(app
->sessions
, &iter
);
1994 delete_ust_app_session(app
->key
.sock
, ua_sess
);
1995 obj
.handle
= ua_sess
->handle
;
1998 obj
.memory_map_size
= 0;
1999 ustctl_release_object(app
->key
.sock
, &obj
);
2003 /* Quiescent wait after stopping trace */
2004 ustctl_wait_quiescent(app
->key
.sock
);
2014 * Start tracing for the UST session.
2016 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
2019 struct lttng_ht_iter iter
;
2020 struct ust_app
*app
;
2022 DBG("Starting all UST traces");
2026 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
2027 ret
= ust_app_start_trace(usess
, app
);
2029 /* Continue to next apps even on error */
2040 * Start tracing for the UST session.
2042 int ust_app_stop_trace_all(struct ltt_ust_session
*usess
)
2045 struct lttng_ht_iter iter
;
2046 struct ust_app
*app
;
2048 DBG("Stopping all UST traces");
2052 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
2053 ret
= ust_app_stop_trace(usess
, app
);
2055 /* Continue to next apps even on error */
2066 * Destroy app UST session.
2068 int ust_app_destroy_trace_all(struct ltt_ust_session
*usess
)
2071 struct lttng_ht_iter iter
;
2072 struct ust_app
*app
;
2074 DBG("Destroy all UST traces");
2078 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
2079 ret
= ust_app_destroy_trace(usess
, app
);
2081 /* Continue to next apps even on error */
2092 * Add channels/events from UST global domain to registered apps at sock.
2094 void ust_app_global_update(struct ltt_ust_session
*usess
, int sock
)
2097 struct lttng_ht_iter iter
, uiter
;
2098 struct ust_app
*app
;
2099 struct ust_app_session
*ua_sess
;
2100 struct ust_app_channel
*ua_chan
;
2101 struct ust_app_event
*ua_event
;
2103 if (usess
== NULL
) {
2104 ERR("No UST session on global update. Returning");
2108 DBG2("UST app global update for app sock %d for session id %d", sock
,
2113 app
= find_app_by_sock(sock
);
2115 ERR("Failed to update app sock %d", sock
);
2119 ua_sess
= create_ust_app_session(usess
, app
);
2120 if (ua_sess
== NULL
) {
2125 * We can iterate safely here over all UST app session sicne the create ust
2126 * app session above made a shadow copy of the UST global domain from the
2129 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
2131 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
2133 /* FIXME: Should we quit here or continue... */
2137 /* For each events */
2138 cds_lfht_for_each_entry(ua_chan
->events
->ht
, &uiter
.iter
, ua_event
,
2140 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
2142 /* FIXME: Should we quit here or continue... */
2148 if (usess
->start_trace
) {
2149 ret
= ust_app_start_trace(usess
, app
);
2154 DBG2("UST trace started for app pid %d", app
->key
.pid
);
2163 * Add context to a specific channel for global UST domain.
2165 int ust_app_add_ctx_channel_glb(struct ltt_ust_session
*usess
,
2166 struct ltt_ust_channel
*uchan
, struct ltt_ust_context
*uctx
)
2169 struct lttng_ht_node_str
*ua_chan_node
;
2170 struct lttng_ht_iter iter
, uiter
;
2171 struct ust_app_channel
*ua_chan
= NULL
;
2172 struct ust_app_session
*ua_sess
;
2173 struct ust_app
*app
;
2177 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
2178 ua_sess
= lookup_session_by_app(usess
, app
);
2179 if (ua_sess
== NULL
) {
2183 /* Lookup channel in the ust app session */
2184 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2185 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2186 if (ua_chan_node
== NULL
) {
2189 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
,
2192 ret
= create_ust_app_channel_context(ua_sess
, ua_chan
, &uctx
->ctx
, app
);
2203 * Add context to a specific event in a channel for global UST domain.
2205 int ust_app_add_ctx_event_glb(struct ltt_ust_session
*usess
,
2206 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
,
2207 struct ltt_ust_context
*uctx
)
2210 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2211 struct lttng_ht_iter iter
, uiter
;
2212 struct ust_app_session
*ua_sess
;
2213 struct ust_app_event
*ua_event
;
2214 struct ust_app_channel
*ua_chan
= NULL
;
2215 struct ust_app
*app
;
2219 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, node
.node
) {
2220 ua_sess
= lookup_session_by_app(usess
, app
);
2221 if (ua_sess
== NULL
) {
2225 /* Lookup channel in the ust app session */
2226 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2227 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2228 if (ua_chan_node
== NULL
) {
2231 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
,
2234 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &uiter
);
2235 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
2236 if (ua_event_node
== NULL
) {
2239 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
,
2242 ret
= create_ust_app_event_context(ua_sess
, ua_event
, &uctx
->ctx
, app
);
2253 * Enable event for a channel from a UST session for a specific PID.
2255 int ust_app_enable_event_pid(struct ltt_ust_session
*usess
,
2256 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
, pid_t pid
)
2259 struct lttng_ht_iter iter
;
2260 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2261 struct ust_app
*app
;
2262 struct ust_app_session
*ua_sess
;
2263 struct ust_app_channel
*ua_chan
;
2264 struct ust_app_event
*ua_event
;
2266 DBG("UST app enabling event %s for PID %d", uevent
->attr
.name
, pid
);
2270 app
= ust_app_find_by_pid(pid
);
2272 ERR("UST app enable event per PID %d not found", pid
);
2277 ua_sess
= lookup_session_by_app(usess
, app
);
2278 /* If ua_sess is NULL, there is a code flow error */
2281 /* Lookup channel in the ust app session */
2282 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
2283 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
2284 /* If the channel is not found, there is a code flow error */
2285 assert(ua_chan_node
);
2287 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2289 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &iter
);
2290 ua_event_node
= lttng_ht_iter_get_node_str(&iter
);
2291 if (ua_event_node
== NULL
) {
2292 ret
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
2297 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
2299 ret
= enable_ust_app_event(ua_sess
, ua_event
, app
);
2311 * Disable event for a channel from a UST session for a specific PID.
2313 int ust_app_disable_event_pid(struct ltt_ust_session
*usess
,
2314 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
, pid_t pid
)
2317 struct lttng_ht_iter iter
;
2318 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2319 struct ust_app
*app
;
2320 struct ust_app_session
*ua_sess
;
2321 struct ust_app_channel
*ua_chan
;
2322 struct ust_app_event
*ua_event
;
2324 DBG("UST app disabling event %s for PID %d", uevent
->attr
.name
, pid
);
2328 app
= ust_app_find_by_pid(pid
);
2330 ERR("UST app disable event per PID %d not found", pid
);
2335 ua_sess
= lookup_session_by_app(usess
, app
);
2336 /* If ua_sess is NULL, there is a code flow error */
2339 /* Lookup channel in the ust app session */
2340 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
2341 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
2342 if (ua_chan_node
== NULL
) {
2343 /* Channel does not exist, skip disabling */
2346 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2348 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &iter
);
2349 ua_event_node
= lttng_ht_iter_get_node_str(&iter
);
2350 if (ua_event_node
== NULL
) {
2351 /* Event does not exist, skip disabling */
2354 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
2356 ret
= disable_ust_app_event(ua_sess
, ua_event
, app
);