2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or modify
5 * it under the terms of the GNU General Public License, version 2 only,
6 * as published by the Free Software Foundation.
8 * This program is distributed in the hope that it will be useful,
9 * but WITHOUT ANY WARRANTY; without even the implied warranty of
10 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11 * GNU General Public License for more details.
13 * You should have received a copy of the GNU General Public License along
14 * with this program; if not, write to the Free Software Foundation, Inc.,
15 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
25 #include <sys/types.h>
27 #include <urcu/compiler.h>
29 #include <common/common.h>
30 #include <common/sessiond-comm/sessiond-comm.h>
35 #include "ust-consumer.h"
39 * Delete ust context safely. RCU read lock must be held before calling
43 void delete_ust_app_ctx(int sock
, struct ust_app_ctx
*ua_ctx
)
46 ustctl_release_object(sock
, ua_ctx
->obj
);
53 * Delete ust app event safely. RCU read lock must be held before calling
57 void delete_ust_app_event(int sock
, struct ust_app_event
*ua_event
)
60 struct lttng_ht_iter iter
;
61 struct ust_app_ctx
*ua_ctx
;
63 /* Destroy each context of event */
64 cds_lfht_for_each_entry(ua_event
->ctx
->ht
, &iter
.iter
, ua_ctx
,
66 ret
= lttng_ht_del(ua_event
->ctx
, &iter
);
68 delete_ust_app_ctx(sock
, ua_ctx
);
70 free(ua_event
->filter
);
71 lttng_ht_destroy(ua_event
->ctx
);
73 if (ua_event
->obj
!= NULL
) {
74 ustctl_release_object(sock
, ua_event
->obj
);
81 * Delete ust app stream safely. RCU read lock must be held before calling
85 void delete_ust_app_stream(int sock
, struct ltt_ust_stream
*stream
)
88 ustctl_release_object(sock
, stream
->obj
);
89 lttng_fd_put(LTTNG_FD_APPS
, 2);
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
);
133 lttng_fd_put(LTTNG_FD_APPS
, 2);
140 * Delete ust app session safely. RCU read lock must be held before calling
144 void delete_ust_app_session(int sock
, struct ust_app_session
*ua_sess
)
147 struct lttng_ht_iter iter
;
148 struct ust_app_channel
*ua_chan
;
150 if (ua_sess
->metadata
) {
151 if (ua_sess
->metadata
->stream_obj
) {
152 ustctl_release_object(sock
, ua_sess
->metadata
->stream_obj
);
153 lttng_fd_put(LTTNG_FD_APPS
, 2);
154 free(ua_sess
->metadata
->stream_obj
);
156 if (ua_sess
->metadata
->obj
) {
157 ustctl_release_object(sock
, ua_sess
->metadata
->obj
);
158 lttng_fd_put(LTTNG_FD_APPS
, 2);
159 free(ua_sess
->metadata
->obj
);
161 trace_ust_destroy_metadata(ua_sess
->metadata
);
164 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
166 ret
= lttng_ht_del(ua_sess
->channels
, &iter
);
168 delete_ust_app_channel(sock
, ua_chan
);
170 lttng_ht_destroy(ua_sess
->channels
);
172 if (ua_sess
->handle
!= -1) {
173 ustctl_release_handle(sock
, ua_sess
->handle
);
179 * Delete a traceable application structure from the global list. Never call
180 * this function outside of a call_rcu call.
183 void delete_ust_app(struct ust_app
*app
)
186 struct lttng_ht_iter iter
;
187 struct ust_app_session
*ua_sess
;
191 /* Delete ust app sessions info */
196 cds_lfht_for_each_entry(app
->sessions
->ht
, &iter
.iter
, ua_sess
,
198 ret
= lttng_ht_del(app
->sessions
, &iter
);
200 delete_ust_app_session(app
->sock
, ua_sess
);
202 lttng_ht_destroy(app
->sessions
);
205 * Wait until we have deleted the application from the sock hash table
206 * before closing this socket, otherwise an application could re-use the
207 * socket ID and race with the teardown, using the same hash table entry.
209 * It's OK to leave the close in call_rcu. We want it to stay unique for
210 * all RCU readers that could run concurrently with unregister app,
211 * therefore we _need_ to only close that socket after a grace period. So
212 * it should stay in this RCU callback.
214 * This close() is a very important step of the synchronization model so
215 * every modification to this function must be carefully reviewed.
221 lttng_fd_put(LTTNG_FD_APPS
, 1);
223 DBG2("UST app pid %d deleted", app
->pid
);
230 * URCU intermediate call to delete an UST app.
233 void delete_ust_app_rcu(struct rcu_head
*head
)
235 struct lttng_ht_node_ulong
*node
=
236 caa_container_of(head
, struct lttng_ht_node_ulong
, head
);
237 struct ust_app
*app
=
238 caa_container_of(node
, struct ust_app
, pid_n
);
240 DBG3("Call RCU deleting app PID %d", app
->pid
);
245 * Alloc new UST app session.
248 struct ust_app_session
*alloc_ust_app_session(void)
250 struct ust_app_session
*ua_sess
;
252 /* Init most of the default value by allocating and zeroing */
253 ua_sess
= zmalloc(sizeof(struct ust_app_session
));
254 if (ua_sess
== NULL
) {
259 ua_sess
->handle
= -1;
260 ua_sess
->channels
= lttng_ht_new(0, LTTNG_HT_TYPE_STRING
);
269 * Alloc new UST app channel.
272 struct ust_app_channel
*alloc_ust_app_channel(char *name
,
273 struct lttng_ust_channel
*attr
)
275 struct ust_app_channel
*ua_chan
;
277 /* Init most of the default value by allocating and zeroing */
278 ua_chan
= zmalloc(sizeof(struct ust_app_channel
));
279 if (ua_chan
== NULL
) {
284 /* Setup channel name */
285 strncpy(ua_chan
->name
, name
, sizeof(ua_chan
->name
));
286 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
288 ua_chan
->enabled
= 1;
289 ua_chan
->handle
= -1;
290 ua_chan
->ctx
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
291 ua_chan
->events
= lttng_ht_new(0, LTTNG_HT_TYPE_STRING
);
292 lttng_ht_node_init_str(&ua_chan
->node
, ua_chan
->name
);
294 CDS_INIT_LIST_HEAD(&ua_chan
->streams
.head
);
296 /* Copy attributes */
298 memcpy(&ua_chan
->attr
, attr
, sizeof(ua_chan
->attr
));
301 DBG3("UST app channel %s allocated", ua_chan
->name
);
310 * Alloc new UST app event.
313 struct ust_app_event
*alloc_ust_app_event(char *name
,
314 struct lttng_ust_event
*attr
)
316 struct ust_app_event
*ua_event
;
318 /* Init most of the default value by allocating and zeroing */
319 ua_event
= zmalloc(sizeof(struct ust_app_event
));
320 if (ua_event
== NULL
) {
325 ua_event
->enabled
= 1;
326 strncpy(ua_event
->name
, name
, sizeof(ua_event
->name
));
327 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
328 ua_event
->ctx
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
329 lttng_ht_node_init_str(&ua_event
->node
, ua_event
->name
);
331 /* Copy attributes */
333 memcpy(&ua_event
->attr
, attr
, sizeof(ua_event
->attr
));
336 DBG3("UST app event %s allocated", ua_event
->name
);
345 * Alloc new UST app context.
348 struct ust_app_ctx
*alloc_ust_app_ctx(struct lttng_ust_context
*uctx
)
350 struct ust_app_ctx
*ua_ctx
;
352 ua_ctx
= zmalloc(sizeof(struct ust_app_ctx
));
353 if (ua_ctx
== NULL
) {
358 memcpy(&ua_ctx
->ctx
, uctx
, sizeof(ua_ctx
->ctx
));
361 DBG3("UST app context %d allocated", ua_ctx
->ctx
.ctx
);
368 * Find an ust_app using the sock and return it. RCU read side lock must be
369 * held before calling this helper function.
372 struct ust_app
*find_app_by_sock(int sock
)
374 struct lttng_ht_node_ulong
*node
;
375 struct lttng_ht_iter iter
;
377 lttng_ht_lookup(ust_app_ht_by_sock
, (void *)((unsigned long) sock
), &iter
);
378 node
= lttng_ht_iter_get_node_ulong(&iter
);
380 DBG2("UST app find by sock %d not found", sock
);
384 return caa_container_of(node
, struct ust_app
, sock_n
);
391 * Create the channel context on the tracer.
394 int create_ust_channel_context(struct ust_app_channel
*ua_chan
,
395 struct ust_app_ctx
*ua_ctx
, struct ust_app
*app
)
399 health_code_update(&health_thread_cmd
);
401 ret
= ustctl_add_context(app
->sock
, &ua_ctx
->ctx
,
402 ua_chan
->obj
, &ua_ctx
->obj
);
407 ua_ctx
->handle
= ua_ctx
->obj
->handle
;
409 DBG2("UST app context created successfully for channel %s", ua_chan
->name
);
412 health_code_update(&health_thread_cmd
);
417 * Create the event context on the tracer.
420 int create_ust_event_context(struct ust_app_event
*ua_event
,
421 struct ust_app_ctx
*ua_ctx
, struct ust_app
*app
)
425 health_code_update(&health_thread_cmd
);
427 ret
= ustctl_add_context(app
->sock
, &ua_ctx
->ctx
,
428 ua_event
->obj
, &ua_ctx
->obj
);
433 ua_ctx
->handle
= ua_ctx
->obj
->handle
;
435 DBG2("UST app context created successfully for event %s", ua_event
->name
);
438 health_code_update(&health_thread_cmd
);
443 * Set the filter on the tracer.
446 int set_ust_event_filter(struct ust_app_event
*ua_event
,
451 health_code_update(&health_thread_cmd
);
453 if (!ua_event
->filter
) {
458 ret
= ustctl_set_filter(app
->sock
, ua_event
->filter
,
464 DBG2("UST filter set successfully for event %s", ua_event
->name
);
467 health_code_update(&health_thread_cmd
);
472 * Disable the specified event on to UST tracer for the UST session.
474 static int disable_ust_event(struct ust_app
*app
,
475 struct ust_app_session
*ua_sess
, struct ust_app_event
*ua_event
)
479 health_code_update(&health_thread_cmd
);
481 ret
= ustctl_disable(app
->sock
, ua_event
->obj
);
483 ERR("UST app event %s disable failed for app (pid: %d) "
484 "and session handle %d with ret %d",
485 ua_event
->attr
.name
, app
->pid
, ua_sess
->handle
, ret
);
489 DBG2("UST app event %s disabled successfully for app (pid: %d)",
490 ua_event
->attr
.name
, app
->pid
);
493 health_code_update(&health_thread_cmd
);
498 * Disable the specified channel on to UST tracer for the UST session.
500 static int disable_ust_channel(struct ust_app
*app
,
501 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
505 health_code_update(&health_thread_cmd
);
507 ret
= ustctl_disable(app
->sock
, ua_chan
->obj
);
509 ERR("UST app channel %s disable failed for app (pid: %d) "
510 "and session handle %d with ret %d",
511 ua_chan
->name
, app
->pid
, ua_sess
->handle
, ret
);
515 DBG2("UST app channel %s disabled successfully for app (pid: %d)",
516 ua_chan
->name
, app
->pid
);
519 health_code_update(&health_thread_cmd
);
524 * Enable the specified channel on to UST tracer for the UST session.
526 static int enable_ust_channel(struct ust_app
*app
,
527 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
531 health_code_update(&health_thread_cmd
);
533 ret
= ustctl_enable(app
->sock
, ua_chan
->obj
);
535 ERR("UST app channel %s enable failed for app (pid: %d) "
536 "and session handle %d with ret %d",
537 ua_chan
->name
, app
->pid
, ua_sess
->handle
, ret
);
541 ua_chan
->enabled
= 1;
543 DBG2("UST app channel %s enabled successfully for app (pid: %d)",
544 ua_chan
->name
, app
->pid
);
547 health_code_update(&health_thread_cmd
);
552 * Enable the specified event on to UST tracer for the UST session.
554 static int enable_ust_event(struct ust_app
*app
,
555 struct ust_app_session
*ua_sess
, struct ust_app_event
*ua_event
)
559 health_code_update(&health_thread_cmd
);
561 ret
= ustctl_enable(app
->sock
, ua_event
->obj
);
563 ERR("UST app event %s enable failed for app (pid: %d) "
564 "and session handle %d with ret %d",
565 ua_event
->attr
.name
, app
->pid
, ua_sess
->handle
, ret
);
569 DBG2("UST app event %s enabled successfully for app (pid: %d)",
570 ua_event
->attr
.name
, app
->pid
);
573 health_code_update(&health_thread_cmd
);
578 * Open metadata onto the UST tracer for a UST session.
580 static int open_ust_metadata(struct ust_app
*app
,
581 struct ust_app_session
*ua_sess
)
584 struct lttng_ust_channel_attr uattr
;
586 health_code_update(&health_thread_cmd
);
588 uattr
.overwrite
= ua_sess
->metadata
->attr
.overwrite
;
589 uattr
.subbuf_size
= ua_sess
->metadata
->attr
.subbuf_size
;
590 uattr
.num_subbuf
= ua_sess
->metadata
->attr
.num_subbuf
;
591 uattr
.switch_timer_interval
=
592 ua_sess
->metadata
->attr
.switch_timer_interval
;
593 uattr
.read_timer_interval
=
594 ua_sess
->metadata
->attr
.read_timer_interval
;
595 uattr
.output
= ua_sess
->metadata
->attr
.output
;
597 /* We are going to receive 2 fds, we need to reserve them. */
598 ret
= lttng_fd_get(LTTNG_FD_APPS
, 2);
600 ERR("Exhausted number of available FD upon metadata open");
603 /* UST tracer metadata creation */
604 ret
= ustctl_open_metadata(app
->sock
, ua_sess
->handle
, &uattr
,
605 &ua_sess
->metadata
->obj
);
607 ERR("UST app open metadata failed for app pid:%d with ret %d",
612 ua_sess
->metadata
->handle
= ua_sess
->metadata
->obj
->handle
;
615 health_code_update(&health_thread_cmd
);
620 * Create stream onto the UST tracer for a UST session.
622 static int create_ust_stream(struct ust_app
*app
,
623 struct ust_app_session
*ua_sess
)
627 health_code_update(&health_thread_cmd
);
629 /* We are going to receive 2 fds, we need to reserve them. */
630 ret
= lttng_fd_get(LTTNG_FD_APPS
, 2);
632 ERR("Exhausted number of available FD upon metadata stream create");
635 ret
= ustctl_create_stream(app
->sock
, ua_sess
->metadata
->obj
,
636 &ua_sess
->metadata
->stream_obj
);
638 ERR("UST create metadata stream failed");
643 health_code_update(&health_thread_cmd
);
648 * Create the specified channel onto the UST tracer for a UST session.
650 static int create_ust_channel(struct ust_app
*app
,
651 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
655 health_code_update(&health_thread_cmd
);
657 /* TODO: remove cast and use lttng-ust-abi.h */
659 /* We are going to receive 2 fds, we need to reserve them. */
660 ret
= lttng_fd_get(LTTNG_FD_APPS
, 2);
662 ERR("Exhausted number of available FD upon create channel");
666 health_code_update(&health_thread_cmd
);
668 ret
= ustctl_create_channel(app
->sock
, ua_sess
->handle
,
669 (struct lttng_ust_channel_attr
*)&ua_chan
->attr
, &ua_chan
->obj
);
671 ERR("Creating channel %s for app (pid: %d, sock: %d) "
672 "and session handle %d with ret %d",
673 ua_chan
->name
, app
->pid
, app
->sock
,
674 ua_sess
->handle
, ret
);
675 lttng_fd_put(LTTNG_FD_APPS
, 2);
679 ua_chan
->handle
= ua_chan
->obj
->handle
;
681 DBG2("UST app channel %s created successfully for pid:%d and sock:%d",
682 ua_chan
->name
, app
->pid
, app
->sock
);
684 health_code_update(&health_thread_cmd
);
686 /* If channel is not enabled, disable it on the tracer */
687 if (!ua_chan
->enabled
) {
688 ret
= disable_ust_channel(app
, ua_sess
, ua_chan
);
695 health_code_update(&health_thread_cmd
);
700 * Create the specified event onto the UST tracer for a UST session.
703 int create_ust_event(struct ust_app
*app
, struct ust_app_session
*ua_sess
,
704 struct ust_app_channel
*ua_chan
, struct ust_app_event
*ua_event
)
708 health_code_update(&health_thread_cmd
);
710 /* Create UST event on tracer */
711 ret
= ustctl_create_event(app
->sock
, &ua_event
->attr
, ua_chan
->obj
,
714 if (ret
== -EEXIST
|| ret
== -EPERM
) {
718 ERR("Error ustctl create event %s for app pid: %d with ret %d",
719 ua_event
->attr
.name
, app
->pid
, ret
);
723 ua_event
->handle
= ua_event
->obj
->handle
;
725 DBG2("UST app event %s created successfully for pid:%d",
726 ua_event
->attr
.name
, app
->pid
);
728 health_code_update(&health_thread_cmd
);
730 /* If event not enabled, disable it on the tracer */
731 if (ua_event
->enabled
== 0) {
732 ret
= disable_ust_event(app
, ua_sess
, ua_event
);
735 * If we hit an EPERM, something is wrong with our disable call. If
736 * we get an EEXIST, there is a problem on the tracer side since we
741 /* Code flow problem */
744 /* It's OK for our use case. */
755 health_code_update(&health_thread_cmd
);
760 * Copy data between an UST app event and a LTT event.
762 static void shadow_copy_event(struct ust_app_event
*ua_event
,
763 struct ltt_ust_event
*uevent
)
765 struct lttng_ht_iter iter
;
766 struct ltt_ust_context
*uctx
;
767 struct ust_app_ctx
*ua_ctx
;
769 strncpy(ua_event
->name
, uevent
->attr
.name
, sizeof(ua_event
->name
));
770 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
772 ua_event
->enabled
= uevent
->enabled
;
774 /* Copy event attributes */
775 memcpy(&ua_event
->attr
, &uevent
->attr
, sizeof(ua_event
->attr
));
777 /* Copy filter bytecode */
778 if (uevent
->filter
) {
779 ua_event
->filter
= zmalloc(sizeof(*ua_event
->filter
) +
780 uevent
->filter
->len
);
781 if (!ua_event
->filter
) {
784 memcpy(ua_event
->filter
, uevent
->filter
,
785 sizeof(*ua_event
->filter
) + uevent
->filter
->len
);
787 cds_lfht_for_each_entry(uevent
->ctx
->ht
, &iter
.iter
, uctx
, node
.node
) {
788 ua_ctx
= alloc_ust_app_ctx(&uctx
->ctx
);
789 if (ua_ctx
== NULL
) {
790 /* malloc() failed. We should simply stop */
794 lttng_ht_node_init_ulong(&ua_ctx
->node
,
795 (unsigned long) ua_ctx
->ctx
.ctx
);
796 lttng_ht_add_unique_ulong(ua_event
->ctx
, &ua_ctx
->node
);
801 * Copy data between an UST app channel and a LTT channel.
803 static void shadow_copy_channel(struct ust_app_channel
*ua_chan
,
804 struct ltt_ust_channel
*uchan
)
806 struct lttng_ht_iter iter
;
807 struct lttng_ht_node_str
*ua_event_node
;
808 struct ltt_ust_event
*uevent
;
809 struct ltt_ust_context
*uctx
;
810 struct ust_app_event
*ua_event
;
811 struct ust_app_ctx
*ua_ctx
;
813 DBG2("UST app shadow copy of channel %s started", ua_chan
->name
);
815 strncpy(ua_chan
->name
, uchan
->name
, sizeof(ua_chan
->name
));
816 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
817 /* Copy event attributes */
818 memcpy(&ua_chan
->attr
, &uchan
->attr
, sizeof(ua_chan
->attr
));
820 ua_chan
->enabled
= uchan
->enabled
;
822 cds_lfht_for_each_entry(uchan
->ctx
->ht
, &iter
.iter
, uctx
, node
.node
) {
823 ua_ctx
= alloc_ust_app_ctx(&uctx
->ctx
);
824 if (ua_ctx
== NULL
) {
827 lttng_ht_node_init_ulong(&ua_ctx
->node
,
828 (unsigned long) ua_ctx
->ctx
.ctx
);
829 lttng_ht_add_unique_ulong(ua_chan
->ctx
, &ua_ctx
->node
);
832 /* Copy all events from ltt ust channel to ust app channel */
833 cds_lfht_for_each_entry(uchan
->events
->ht
, &iter
.iter
, uevent
, node
.node
) {
834 struct lttng_ht_iter uiter
;
836 lttng_ht_lookup(ua_chan
->events
, (void *) uevent
->attr
.name
, &uiter
);
837 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
838 if (ua_event_node
== NULL
) {
839 DBG2("UST event %s not found on shadow copy channel",
841 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
842 if (ua_event
== NULL
) {
845 shadow_copy_event(ua_event
, uevent
);
846 lttng_ht_add_unique_str(ua_chan
->events
, &ua_event
->node
);
850 DBG3("UST app shadow copy of channel %s done", ua_chan
->name
);
854 * Copy data between a UST app session and a regular LTT session.
856 static void shadow_copy_session(struct ust_app_session
*ua_sess
,
857 struct ltt_ust_session
*usess
, struct ust_app
*app
)
859 struct lttng_ht_node_str
*ua_chan_node
;
860 struct lttng_ht_iter iter
;
861 struct ltt_ust_channel
*uchan
;
862 struct ust_app_channel
*ua_chan
;
868 /* Get date and time for unique app path */
870 timeinfo
= localtime(&rawtime
);
871 strftime(datetime
, sizeof(datetime
), "%Y%m%d-%H%M%S", timeinfo
);
873 DBG2("Shadow copy of session handle %d", ua_sess
->handle
);
875 ua_sess
->id
= usess
->id
;
876 ua_sess
->uid
= usess
->uid
;
877 ua_sess
->gid
= usess
->gid
;
879 ret
= snprintf(ua_sess
->path
, PATH_MAX
, "%s-%d-%s/", app
->name
, app
->pid
,
882 PERROR("asprintf UST shadow copy session");
883 /* TODO: We cannot return an error from here.. */
887 /* TODO: support all UST domain */
889 /* Iterate over all channels in global domain. */
890 cds_lfht_for_each_entry(usess
->domain_global
.channels
->ht
, &iter
.iter
,
892 struct lttng_ht_iter uiter
;
894 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
895 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
896 if (ua_chan_node
!= NULL
) {
897 /* Session exist. Contiuing. */
901 DBG2("Channel %s not found on shadow session copy, creating it",
903 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
904 if (ua_chan
== NULL
) {
905 /* malloc failed FIXME: Might want to do handle ENOMEM .. */
909 shadow_copy_channel(ua_chan
, uchan
);
910 lttng_ht_add_unique_str(ua_sess
->channels
, &ua_chan
->node
);
915 * Lookup sesison wrapper.
918 void __lookup_session_by_app(struct ltt_ust_session
*usess
,
919 struct ust_app
*app
, struct lttng_ht_iter
*iter
)
921 /* Get right UST app session from app */
922 lttng_ht_lookup(app
->sessions
, (void *)((unsigned long) usess
->id
), iter
);
926 * Return ust app session from the app session hashtable using the UST session
929 static struct ust_app_session
*lookup_session_by_app(
930 struct ltt_ust_session
*usess
, struct ust_app
*app
)
932 struct lttng_ht_iter iter
;
933 struct lttng_ht_node_ulong
*node
;
935 __lookup_session_by_app(usess
, app
, &iter
);
936 node
= lttng_ht_iter_get_node_ulong(&iter
);
941 return caa_container_of(node
, struct ust_app_session
, node
);
948 * Create a UST session onto the tracer of app and add it the session
951 * Return ust app session or NULL on error.
953 static struct ust_app_session
*create_ust_app_session(
954 struct ltt_ust_session
*usess
, struct ust_app
*app
)
957 struct ust_app_session
*ua_sess
;
959 health_code_update(&health_thread_cmd
);
961 ua_sess
= lookup_session_by_app(usess
, app
);
962 if (ua_sess
== NULL
) {
963 DBG2("UST app pid: %d session id %d not found, creating it",
964 app
->pid
, usess
->id
);
965 ua_sess
= alloc_ust_app_session();
966 if (ua_sess
== NULL
) {
967 /* Only malloc can failed so something is really wrong */
970 shadow_copy_session(ua_sess
, usess
, app
);
973 health_code_update(&health_thread_cmd
);
975 if (ua_sess
->handle
== -1) {
976 ret
= ustctl_create_session(app
->sock
);
978 ERR("Creating session for app pid %d", app
->pid
);
979 /* This means that the tracer is gone... */
980 ua_sess
= (void*) -1UL;
984 ua_sess
->handle
= ret
;
986 /* Add ust app session to app's HT */
987 lttng_ht_node_init_ulong(&ua_sess
->node
, (unsigned long) ua_sess
->id
);
988 lttng_ht_add_unique_ulong(app
->sessions
, &ua_sess
->node
);
990 DBG2("UST app session created successfully with handle %d", ret
);
994 health_code_update(&health_thread_cmd
);
998 delete_ust_app_session(-1, ua_sess
);
999 health_code_update(&health_thread_cmd
);
1004 * Create a context for the channel on the tracer.
1007 int create_ust_app_channel_context(struct ust_app_session
*ua_sess
,
1008 struct ust_app_channel
*ua_chan
, struct lttng_ust_context
*uctx
,
1009 struct ust_app
*app
)
1012 struct lttng_ht_iter iter
;
1013 struct lttng_ht_node_ulong
*node
;
1014 struct ust_app_ctx
*ua_ctx
;
1016 DBG2("UST app adding context to channel %s", ua_chan
->name
);
1018 lttng_ht_lookup(ua_chan
->ctx
, (void *)((unsigned long)uctx
->ctx
), &iter
);
1019 node
= lttng_ht_iter_get_node_ulong(&iter
);
1025 ua_ctx
= alloc_ust_app_ctx(uctx
);
1026 if (ua_ctx
== NULL
) {
1032 lttng_ht_node_init_ulong(&ua_ctx
->node
, (unsigned long) ua_ctx
->ctx
.ctx
);
1033 lttng_ht_add_unique_ulong(ua_chan
->ctx
, &ua_ctx
->node
);
1035 ret
= create_ust_channel_context(ua_chan
, ua_ctx
, app
);
1045 * Create an UST context and enable it for the event on the tracer.
1048 int create_ust_app_event_context(struct ust_app_session
*ua_sess
,
1049 struct ust_app_event
*ua_event
, struct lttng_ust_context
*uctx
,
1050 struct ust_app
*app
)
1053 struct lttng_ht_iter iter
;
1054 struct lttng_ht_node_ulong
*node
;
1055 struct ust_app_ctx
*ua_ctx
;
1057 DBG2("UST app adding context to event %s", ua_event
->name
);
1059 lttng_ht_lookup(ua_event
->ctx
, (void *)((unsigned long)uctx
->ctx
), &iter
);
1060 node
= lttng_ht_iter_get_node_ulong(&iter
);
1066 ua_ctx
= alloc_ust_app_ctx(uctx
);
1067 if (ua_ctx
== NULL
) {
1073 lttng_ht_node_init_ulong(&ua_ctx
->node
, (unsigned long) ua_ctx
->ctx
.ctx
);
1074 lttng_ht_add_unique_ulong(ua_event
->ctx
, &ua_ctx
->node
);
1076 ret
= create_ust_event_context(ua_event
, ua_ctx
, app
);
1086 * Set UST filter for the event on the tracer.
1089 int set_ust_app_event_filter(struct ust_app_session
*ua_sess
,
1090 struct ust_app_event
*ua_event
,
1091 struct lttng_filter_bytecode
*bytecode
,
1092 struct ust_app
*app
)
1096 DBG2("UST app adding context to event %s", ua_event
->name
);
1098 /* Copy filter bytecode */
1099 ua_event
->filter
= zmalloc(sizeof(*ua_event
->filter
) + bytecode
->len
);
1100 if (!ua_event
->filter
) {
1103 memcpy(ua_event
->filter
, bytecode
,
1104 sizeof(*ua_event
->filter
) + bytecode
->len
);
1105 ret
= set_ust_event_filter(ua_event
, app
);
1115 * Enable on the tracer side a ust app event for the session and channel.
1118 int enable_ust_app_event(struct ust_app_session
*ua_sess
,
1119 struct ust_app_event
*ua_event
, struct ust_app
*app
)
1123 ret
= enable_ust_event(app
, ua_sess
, ua_event
);
1128 ua_event
->enabled
= 1;
1135 * Disable on the tracer side a ust app event for the session and channel.
1137 static int disable_ust_app_event(struct ust_app_session
*ua_sess
,
1138 struct ust_app_event
*ua_event
, struct ust_app
*app
)
1142 ret
= disable_ust_event(app
, ua_sess
, ua_event
);
1147 ua_event
->enabled
= 0;
1154 * Lookup ust app channel for session and disable it on the tracer side.
1157 int disable_ust_app_channel(struct ust_app_session
*ua_sess
,
1158 struct ust_app_channel
*ua_chan
, struct ust_app
*app
)
1162 ret
= disable_ust_channel(app
, ua_sess
, ua_chan
);
1167 ua_chan
->enabled
= 0;
1174 * Lookup ust app channel for session and enable it on the tracer side.
1176 static int enable_ust_app_channel(struct ust_app_session
*ua_sess
,
1177 struct ltt_ust_channel
*uchan
, struct ust_app
*app
)
1180 struct lttng_ht_iter iter
;
1181 struct lttng_ht_node_str
*ua_chan_node
;
1182 struct ust_app_channel
*ua_chan
;
1184 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
1185 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
1186 if (ua_chan_node
== NULL
) {
1187 DBG2("Unable to find channel %s in ust session id %u",
1188 uchan
->name
, ua_sess
->id
);
1192 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1194 ret
= enable_ust_channel(app
, ua_sess
, ua_chan
);
1204 * Create UST app channel and create it on the tracer.
1206 static struct ust_app_channel
*create_ust_app_channel(
1207 struct ust_app_session
*ua_sess
, struct ltt_ust_channel
*uchan
,
1208 struct ust_app
*app
)
1211 struct lttng_ht_iter iter
;
1212 struct lttng_ht_node_str
*ua_chan_node
;
1213 struct ust_app_channel
*ua_chan
;
1215 /* Lookup channel in the ust app session */
1216 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
1217 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
1218 if (ua_chan_node
!= NULL
) {
1219 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1223 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
1224 if (ua_chan
== NULL
) {
1225 /* Only malloc can fail here */
1228 shadow_copy_channel(ua_chan
, uchan
);
1230 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
1232 /* Not found previously means that it does not exist on the tracer */
1233 assert(ret
!= -EEXIST
);
1237 lttng_ht_add_unique_str(ua_sess
->channels
, &ua_chan
->node
);
1239 DBG2("UST app create channel %s for PID %d completed", ua_chan
->name
,
1246 delete_ust_app_channel(-1, ua_chan
);
1251 * Create UST app event and create it on the tracer side.
1254 int create_ust_app_event(struct ust_app_session
*ua_sess
,
1255 struct ust_app_channel
*ua_chan
, struct ltt_ust_event
*uevent
,
1256 struct ust_app
*app
)
1259 struct lttng_ht_iter iter
;
1260 struct lttng_ht_node_str
*ua_event_node
;
1261 struct ust_app_event
*ua_event
;
1263 /* Get event node */
1264 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &iter
);
1265 ua_event_node
= lttng_ht_iter_get_node_str(&iter
);
1266 if (ua_event_node
!= NULL
) {
1271 /* Does not exist so create one */
1272 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
1273 if (ua_event
== NULL
) {
1274 /* Only malloc can failed so something is really wrong */
1278 shadow_copy_event(ua_event
, uevent
);
1280 /* Create it on the tracer side */
1281 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
1283 /* Not found previously means that it does not exist on the tracer */
1284 assert(ret
!= -EEXIST
);
1288 lttng_ht_add_unique_str(ua_chan
->events
, &ua_event
->node
);
1290 DBG2("UST app create event %s for PID %d completed", ua_event
->name
,
1297 /* Valid. Calling here is already in a read side lock */
1298 delete_ust_app_event(-1, ua_event
);
1303 * Create UST metadata and open it on the tracer side.
1305 static int create_ust_app_metadata(struct ust_app_session
*ua_sess
,
1306 char *pathname
, struct ust_app
*app
)
1310 if (ua_sess
->metadata
== NULL
) {
1311 /* Allocate UST metadata */
1312 ua_sess
->metadata
= trace_ust_create_metadata(pathname
);
1313 if (ua_sess
->metadata
== NULL
) {
1314 /* malloc() failed */
1318 ret
= open_ust_metadata(app
, ua_sess
);
1320 DBG3("Opening metadata failed. Cleaning up memory");
1322 /* Cleanup failed metadata struct */
1323 free(ua_sess
->metadata
);
1325 * This is very important because delete_ust_app_session check if
1326 * the pointer is null or not in order to delete the metadata.
1328 ua_sess
->metadata
= NULL
;
1332 DBG2("UST metadata opened for app pid %d", app
->pid
);
1335 /* Open UST metadata stream */
1336 if (ua_sess
->metadata
->stream_obj
== NULL
) {
1337 ret
= create_ust_stream(app
, ua_sess
);
1342 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
,
1343 "%s/metadata", ua_sess
->path
);
1345 PERROR("asprintf UST create stream");
1349 DBG2("UST metadata stream object created for app pid %d",
1352 ERR("Attempting to create stream without metadata opened");
1363 * Return pointer to traceable apps list.
1365 struct lttng_ht
*ust_app_get_ht(void)
1371 * Return ust app pointer or NULL if not found.
1373 struct ust_app
*ust_app_find_by_pid(pid_t pid
)
1375 struct lttng_ht_node_ulong
*node
;
1376 struct lttng_ht_iter iter
;
1379 lttng_ht_lookup(ust_app_ht
, (void *)((unsigned long) pid
), &iter
);
1380 node
= lttng_ht_iter_get_node_ulong(&iter
);
1382 DBG2("UST app no found with pid %d", pid
);
1387 DBG2("Found UST app by pid %d", pid
);
1389 return caa_container_of(node
, struct ust_app
, pid_n
);
1397 * Using pid and uid (of the app), allocate a new ust_app struct and
1398 * add it to the global traceable app list.
1400 * On success, return 0, else return malloc -ENOMEM, or -EINVAL if app
1401 * bitness is not supported.
1403 int ust_app_register(struct ust_register_msg
*msg
, int sock
)
1405 struct ust_app
*lta
;
1408 if ((msg
->bits_per_long
== 64 &&
1409 (uatomic_read(&ust_consumerd64_fd
) == -EINVAL
))
1410 || (msg
->bits_per_long
== 32 &&
1411 (uatomic_read(&ust_consumerd32_fd
) == -EINVAL
))) {
1412 ERR("Registration failed: application \"%s\" (pid: %d) has "
1413 "%d-bit long, but no consumerd for this long size is available.\n",
1414 msg
->name
, msg
->pid
, msg
->bits_per_long
);
1419 lttng_fd_put(LTTNG_FD_APPS
, 1);
1422 if (msg
->major
!= LTTNG_UST_COMM_MAJOR
) {
1423 ERR("Registration failed: application \"%s\" (pid: %d) has "
1424 "communication protocol version %u.%u, but sessiond supports 2.x.\n",
1425 msg
->name
, msg
->pid
, msg
->major
, msg
->minor
);
1430 lttng_fd_put(LTTNG_FD_APPS
, 1);
1433 lta
= zmalloc(sizeof(struct ust_app
));
1439 lta
->ppid
= msg
->ppid
;
1440 lta
->uid
= msg
->uid
;
1441 lta
->gid
= msg
->gid
;
1442 lta
->compatible
= 0; /* Not compatible until proven */
1443 lta
->bits_per_long
= msg
->bits_per_long
;
1444 lta
->v_major
= msg
->major
;
1445 lta
->v_minor
= msg
->minor
;
1446 strncpy(lta
->name
, msg
->name
, sizeof(lta
->name
));
1447 lta
->name
[16] = '\0';
1448 lta
->sessions
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
1450 lta
->pid
= msg
->pid
;
1451 lttng_ht_node_init_ulong(<a
->pid_n
, (unsigned long)lta
->pid
);
1453 lttng_ht_node_init_ulong(<a
->sock_n
, (unsigned long)lta
->sock
);
1458 * On a re-registration, we want to kick out the previous registration of
1461 lttng_ht_add_replace_ulong(ust_app_ht
, <a
->pid_n
);
1464 * The socket _should_ be unique until _we_ call close. So, a add_unique
1465 * for the ust_app_ht_by_sock is used which asserts fail if the entry was
1466 * already in the table.
1468 lttng_ht_add_unique_ulong(ust_app_ht_by_sock
, <a
->sock_n
);
1472 DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s"
1473 " (version %d.%d)", lta
->pid
, lta
->ppid
, lta
->uid
, lta
->gid
,
1474 lta
->sock
, lta
->name
, lta
->v_major
, lta
->v_minor
);
1480 * Unregister app by removing it from the global traceable app list and freeing
1483 * The socket is already closed at this point so no close to sock.
1485 void ust_app_unregister(int sock
)
1487 struct ust_app
*lta
;
1488 struct lttng_ht_node_ulong
*node
;
1489 struct lttng_ht_iter iter
;
1494 /* Get the node reference for a call_rcu */
1495 lttng_ht_lookup(ust_app_ht_by_sock
, (void *)((unsigned long) sock
), &iter
);
1496 node
= lttng_ht_iter_get_node_ulong(&iter
);
1498 ERR("Unable to find app by sock %d", sock
);
1502 lta
= caa_container_of(node
, struct ust_app
, sock_n
);
1504 DBG("PID %d unregistering with sock %d", lta
->pid
, sock
);
1506 /* Remove application from PID hash table */
1507 ret
= lttng_ht_del(ust_app_ht_by_sock
, &iter
);
1510 /* Assign second node for deletion */
1511 iter
.iter
.node
= <a
->pid_n
.node
;
1513 ret
= lttng_ht_del(ust_app_ht
, &iter
);
1517 call_rcu(<a
->pid_n
.head
, delete_ust_app_rcu
);
1525 * Return traceable_app_count
1527 unsigned long ust_app_list_count(void)
1529 unsigned long count
;
1532 count
= lttng_ht_get_count(ust_app_ht
);
1539 * Fill events array with all events name of all registered apps.
1541 int ust_app_list_events(struct lttng_event
**events
)
1544 size_t nbmem
, count
= 0;
1545 struct lttng_ht_iter iter
;
1546 struct ust_app
*app
;
1547 struct lttng_event
*tmp
;
1549 nbmem
= UST_APP_EVENT_LIST_SIZE
;
1550 tmp
= zmalloc(nbmem
* sizeof(struct lttng_event
));
1552 PERROR("zmalloc ust app events");
1559 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1560 struct lttng_ust_tracepoint_iter uiter
;
1562 health_code_update(&health_thread_cmd
);
1564 if (!app
->compatible
) {
1566 * TODO: In time, we should notice the caller of this error by
1567 * telling him that this is a version error.
1571 handle
= ustctl_tracepoint_list(app
->sock
);
1573 ERR("UST app list events getting handle failed for app pid %d",
1578 while ((ret
= ustctl_tracepoint_list_get(app
->sock
, handle
,
1579 &uiter
)) != -ENOENT
) {
1580 health_code_update(&health_thread_cmd
);
1581 if (count
>= nbmem
) {
1582 DBG2("Reallocating event list from %zu to %zu entries", nbmem
,
1585 tmp
= realloc(tmp
, nbmem
* sizeof(struct lttng_event
));
1587 PERROR("realloc ust app events");
1592 memcpy(tmp
[count
].name
, uiter
.name
, LTTNG_UST_SYM_NAME_LEN
);
1593 tmp
[count
].loglevel
= uiter
.loglevel
;
1594 tmp
[count
].type
= (enum lttng_event_type
) LTTNG_UST_TRACEPOINT
;
1595 tmp
[count
].pid
= app
->pid
;
1596 tmp
[count
].enabled
= -1;
1604 DBG2("UST app list events done (%zu events)", count
);
1609 health_code_update(&health_thread_cmd
);
1614 * Fill events array with all events name of all registered apps.
1616 int ust_app_list_event_fields(struct lttng_event_field
**fields
)
1619 size_t nbmem
, count
= 0;
1620 struct lttng_ht_iter iter
;
1621 struct ust_app
*app
;
1622 struct lttng_event_field
*tmp
;
1624 nbmem
= UST_APP_EVENT_LIST_SIZE
;
1625 tmp
= zmalloc(nbmem
* sizeof(struct lttng_event_field
));
1627 PERROR("zmalloc ust app event fields");
1634 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1635 struct lttng_ust_field_iter uiter
;
1637 health_code_update(&health_thread_cmd
);
1639 if (!app
->compatible
) {
1641 * TODO: In time, we should notice the caller of this error by
1642 * telling him that this is a version error.
1646 handle
= ustctl_tracepoint_field_list(app
->sock
);
1648 ERR("UST app list event fields getting handle failed for app pid %d",
1653 while ((ret
= ustctl_tracepoint_field_list_get(app
->sock
, handle
,
1654 &uiter
)) != -ENOENT
) {
1655 health_code_update(&health_thread_cmd
);
1656 if (count
>= nbmem
) {
1657 DBG2("Reallocating event field list from %zu to %zu entries", nbmem
,
1660 tmp
= realloc(tmp
, nbmem
* sizeof(struct lttng_event_field
));
1662 PERROR("realloc ust app event fields");
1668 memcpy(tmp
[count
].field_name
, uiter
.field_name
, LTTNG_UST_SYM_NAME_LEN
);
1669 tmp
[count
].type
= uiter
.type
;
1671 memcpy(tmp
[count
].event
.name
, uiter
.event_name
, LTTNG_UST_SYM_NAME_LEN
);
1672 tmp
[count
].event
.loglevel
= uiter
.loglevel
;
1673 tmp
[count
].event
.type
= LTTNG_UST_TRACEPOINT
;
1674 tmp
[count
].event
.pid
= app
->pid
;
1675 tmp
[count
].event
.enabled
= -1;
1683 DBG2("UST app list event fields done (%zu events)", count
);
1688 health_code_update(&health_thread_cmd
);
1693 * Free and clean all traceable apps of the global list.
1695 void ust_app_clean_list(void)
1698 struct lttng_ht_iter iter
;
1699 struct lttng_ht_node_ulong
*node
;
1701 DBG2("UST app cleaning registered apps hash table");
1705 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, node
, node
) {
1706 ret
= lttng_ht_del(ust_app_ht
, &iter
);
1708 call_rcu(&node
->head
, delete_ust_app_rcu
);
1711 /* Cleanup socket hash table */
1712 cds_lfht_for_each_entry(ust_app_ht_by_sock
->ht
, &iter
.iter
, node
, node
) {
1713 ret
= lttng_ht_del(ust_app_ht_by_sock
, &iter
);
1717 /* Destroy is done only when the ht is empty */
1718 lttng_ht_destroy(ust_app_ht
);
1719 lttng_ht_destroy(ust_app_ht_by_sock
);
1725 * Init UST app hash table.
1727 void ust_app_ht_alloc(void)
1729 ust_app_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
1730 ust_app_ht_by_sock
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
1734 * For a specific UST session, disable the channel for all registered apps.
1736 int ust_app_disable_channel_glb(struct ltt_ust_session
*usess
,
1737 struct ltt_ust_channel
*uchan
)
1740 struct lttng_ht_iter iter
;
1741 struct lttng_ht_node_str
*ua_chan_node
;
1742 struct ust_app
*app
;
1743 struct ust_app_session
*ua_sess
;
1744 struct ust_app_channel
*ua_chan
;
1746 if (usess
== NULL
|| uchan
== NULL
) {
1747 ERR("Disabling UST global channel with NULL values");
1752 DBG2("UST app disabling channel %s from global domain for session id %d",
1753 uchan
->name
, usess
->id
);
1757 /* For every registered applications */
1758 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1759 struct lttng_ht_iter uiter
;
1760 if (!app
->compatible
) {
1762 * TODO: In time, we should notice the caller of this error by
1763 * telling him that this is a version error.
1767 ua_sess
= lookup_session_by_app(usess
, app
);
1768 if (ua_sess
== NULL
) {
1773 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1774 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1775 /* If the session if found for the app, the channel must be there */
1776 assert(ua_chan_node
);
1778 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1779 /* The channel must not be already disabled */
1780 assert(ua_chan
->enabled
== 1);
1782 /* Disable channel onto application */
1783 ret
= disable_ust_app_channel(ua_sess
, ua_chan
, app
);
1785 /* XXX: We might want to report this error at some point... */
1797 * For a specific UST session, enable the channel for all registered apps.
1799 int ust_app_enable_channel_glb(struct ltt_ust_session
*usess
,
1800 struct ltt_ust_channel
*uchan
)
1803 struct lttng_ht_iter iter
;
1804 struct ust_app
*app
;
1805 struct ust_app_session
*ua_sess
;
1807 if (usess
== NULL
|| uchan
== NULL
) {
1808 ERR("Adding UST global channel to NULL values");
1813 DBG2("UST app enabling channel %s to global domain for session id %d",
1814 uchan
->name
, usess
->id
);
1818 /* For every registered applications */
1819 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1820 if (!app
->compatible
) {
1822 * TODO: In time, we should notice the caller of this error by
1823 * telling him that this is a version error.
1827 ua_sess
= lookup_session_by_app(usess
, app
);
1828 if (ua_sess
== NULL
) {
1832 /* Enable channel onto application */
1833 ret
= enable_ust_app_channel(ua_sess
, uchan
, app
);
1835 /* XXX: We might want to report this error at some point... */
1847 * Disable an event in a channel and for a specific session.
1849 int ust_app_disable_event_glb(struct ltt_ust_session
*usess
,
1850 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1853 struct lttng_ht_iter iter
, uiter
;
1854 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
1855 struct ust_app
*app
;
1856 struct ust_app_session
*ua_sess
;
1857 struct ust_app_channel
*ua_chan
;
1858 struct ust_app_event
*ua_event
;
1860 DBG("UST app disabling event %s for all apps in channel "
1861 "%s for session id %d", uevent
->attr
.name
, uchan
->name
, usess
->id
);
1865 /* For all registered applications */
1866 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1867 if (!app
->compatible
) {
1869 * TODO: In time, we should notice the caller of this error by
1870 * telling him that this is a version error.
1874 ua_sess
= lookup_session_by_app(usess
, app
);
1875 if (ua_sess
== NULL
) {
1880 /* Lookup channel in the ust app session */
1881 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1882 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1883 if (ua_chan_node
== NULL
) {
1884 DBG2("Channel %s not found in session id %d for app pid %d."
1885 "Skipping", uchan
->name
, usess
->id
, app
->pid
);
1888 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1890 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &uiter
);
1891 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
1892 if (ua_event_node
== NULL
) {
1893 DBG2("Event %s not found in channel %s for app pid %d."
1894 "Skipping", uevent
->attr
.name
, uchan
->name
, app
->pid
);
1897 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
1899 ret
= disable_ust_app_event(ua_sess
, ua_event
, app
);
1901 /* XXX: Report error someday... */
1912 * For a specific UST session and UST channel, the event for all
1915 int ust_app_disable_all_event_glb(struct ltt_ust_session
*usess
,
1916 struct ltt_ust_channel
*uchan
)
1919 struct lttng_ht_iter iter
, uiter
;
1920 struct lttng_ht_node_str
*ua_chan_node
;
1921 struct ust_app
*app
;
1922 struct ust_app_session
*ua_sess
;
1923 struct ust_app_channel
*ua_chan
;
1924 struct ust_app_event
*ua_event
;
1926 DBG("UST app disabling all event for all apps in channel "
1927 "%s for session id %d", uchan
->name
, usess
->id
);
1931 /* For all registered applications */
1932 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1933 if (!app
->compatible
) {
1935 * TODO: In time, we should notice the caller of this error by
1936 * telling him that this is a version error.
1940 ua_sess
= lookup_session_by_app(usess
, app
);
1941 /* If ua_sess is NULL, there is a code flow error */
1944 /* Lookup channel in the ust app session */
1945 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1946 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1947 /* If the channel is not found, there is a code flow error */
1948 assert(ua_chan_node
);
1950 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1952 /* Disable each events of channel */
1953 cds_lfht_for_each_entry(ua_chan
->events
->ht
, &uiter
.iter
, ua_event
,
1955 ret
= disable_ust_app_event(ua_sess
, ua_event
, app
);
1957 /* XXX: Report error someday... */
1969 * For a specific UST session, create the channel for all registered apps.
1971 int ust_app_create_channel_glb(struct ltt_ust_session
*usess
,
1972 struct ltt_ust_channel
*uchan
)
1974 struct lttng_ht_iter iter
;
1975 struct ust_app
*app
;
1976 struct ust_app_session
*ua_sess
;
1977 struct ust_app_channel
*ua_chan
;
1979 /* Very wrong code flow */
1983 DBG2("UST app adding channel %s to global domain for session id %d",
1984 uchan
->name
, usess
->id
);
1988 /* For every registered applications */
1989 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1990 if (!app
->compatible
) {
1992 * TODO: In time, we should notice the caller of this error by
1993 * telling him that this is a version error.
1998 * Create session on the tracer side and add it to app session HT. Note
1999 * that if session exist, it will simply return a pointer to the ust
2002 ua_sess
= create_ust_app_session(usess
, app
);
2003 if (ua_sess
== NULL
) {
2004 /* The malloc() failed. */
2006 } else if (ua_sess
== (void *) -1UL) {
2007 /* The application's socket is not valid. Contiuing */
2011 /* Create channel onto application */
2012 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
2013 if (ua_chan
== NULL
) {
2014 /* Major problem here and it's maybe the tracer or malloc() */
2028 * Enable event for a specific session and channel on the tracer.
2030 int ust_app_enable_event_glb(struct ltt_ust_session
*usess
,
2031 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
2034 struct lttng_ht_iter iter
, uiter
;
2035 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2036 struct ust_app
*app
;
2037 struct ust_app_session
*ua_sess
;
2038 struct ust_app_channel
*ua_chan
;
2039 struct ust_app_event
*ua_event
;
2041 DBG("UST app enabling event %s for all apps for session id %d",
2042 uevent
->attr
.name
, usess
->id
);
2045 * NOTE: At this point, this function is called only if the session and
2046 * channel passed are already created for all apps. and enabled on the
2052 /* For all registered applications */
2053 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2054 if (!app
->compatible
) {
2056 * TODO: In time, we should notice the caller of this error by
2057 * telling him that this is a version error.
2061 ua_sess
= lookup_session_by_app(usess
, app
);
2062 /* If ua_sess is NULL, there is a code flow error */
2065 /* Lookup channel in the ust app session */
2066 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2067 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2068 /* If the channel is not found, there is a code flow error */
2069 assert(ua_chan_node
);
2071 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2073 lttng_ht_lookup(ua_chan
->events
, (void*)uevent
->attr
.name
, &uiter
);
2074 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
2075 if (ua_event_node
== NULL
) {
2076 DBG3("UST app enable event %s not found for app PID %d."
2077 "Skipping app", uevent
->attr
.name
, app
->pid
);
2080 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
2082 ret
= enable_ust_app_event(ua_sess
, ua_event
, app
);
2094 * For a specific existing UST session and UST channel, creates the event for
2095 * all registered apps.
2097 int ust_app_create_event_glb(struct ltt_ust_session
*usess
,
2098 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
2101 struct lttng_ht_iter iter
, uiter
;
2102 struct lttng_ht_node_str
*ua_chan_node
;
2103 struct ust_app
*app
;
2104 struct ust_app_session
*ua_sess
;
2105 struct ust_app_channel
*ua_chan
;
2107 DBG("UST app creating event %s for all apps for session id %d",
2108 uevent
->attr
.name
, usess
->id
);
2112 /* For all registered applications */
2113 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2114 if (!app
->compatible
) {
2116 * TODO: In time, we should notice the caller of this error by
2117 * telling him that this is a version error.
2121 ua_sess
= lookup_session_by_app(usess
, app
);
2122 /* If ua_sess is NULL, there is a code flow error */
2125 /* Lookup channel in the ust app session */
2126 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2127 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2128 /* If the channel is not found, there is a code flow error */
2129 assert(ua_chan_node
);
2131 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2133 ret
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
2135 if (ret
!= -EEXIST
) {
2136 /* Possible value at this point: -ENOMEM. If so, we stop! */
2139 DBG2("UST app event %s already exist on app PID %d",
2140 uevent
->attr
.name
, app
->pid
);
2151 * Start tracing for a specific UST session and app.
2153 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
2156 struct lttng_ht_iter iter
;
2157 struct ust_app_session
*ua_sess
;
2158 struct ust_app_channel
*ua_chan
;
2159 struct ltt_ust_stream
*ustream
;
2160 struct consumer_socket
*socket
;
2162 DBG("Starting tracing for ust app pid %d", app
->pid
);
2166 if (!app
->compatible
) {
2170 ua_sess
= lookup_session_by_app(usess
, app
);
2171 if (ua_sess
== NULL
) {
2172 goto error_rcu_unlock
;
2175 /* Upon restart, we skip the setup, already done */
2176 if (ua_sess
->started
) {
2180 /* Create directories if consumer is LOCAL and has a path defined. */
2181 if (usess
->consumer
->type
== CONSUMER_DST_LOCAL
&&
2182 strlen(usess
->consumer
->dst
.trace_path
) > 0) {
2183 ret
= run_as_mkdir_recursive(usess
->consumer
->dst
.trace_path
,
2184 S_IRWXU
| S_IRWXG
, usess
->uid
, usess
->gid
);
2186 if (ret
!= -EEXIST
) {
2187 ERR("Trace directory creation error");
2189 goto error_rcu_unlock
;
2194 /* Indicate that the session has been started once */
2195 ua_sess
->started
= 1;
2197 ret
= create_ust_app_metadata(ua_sess
, usess
->pathname
, app
);
2199 ret
= LTTNG_ERR_UST_META_FAIL
;
2200 goto error_rcu_unlock
;
2203 /* For each channel */
2204 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
2206 /* Create all streams */
2208 /* Create UST stream */
2209 ustream
= zmalloc(sizeof(*ustream
));
2210 if (ustream
== NULL
) {
2211 PERROR("zmalloc ust stream");
2212 goto error_rcu_unlock
;
2215 /* We are going to receive 2 fds, we need to reserve them. */
2216 ret
= lttng_fd_get(LTTNG_FD_APPS
, 2);
2218 ERR("Exhausted number of available FD upon stream create");
2220 goto error_rcu_unlock
;
2223 health_code_update(&health_thread_cmd
);
2225 ret
= ustctl_create_stream(app
->sock
, ua_chan
->obj
,
2228 /* Got all streams */
2229 lttng_fd_put(LTTNG_FD_APPS
, 2);
2231 ret
= LTTNG_ERR_UST_STREAM_FAIL
;
2234 ustream
->handle
= ustream
->obj
->handle
;
2236 health_code_update(&health_thread_cmd
);
2238 /* Order is important */
2239 cds_list_add_tail(&ustream
->list
, &ua_chan
->streams
.head
);
2240 ret
= snprintf(ustream
->name
, sizeof(ustream
->name
), "%s_%u",
2241 ua_chan
->name
, ua_chan
->streams
.count
++);
2243 PERROR("asprintf UST create stream");
2245 * XXX what should we do here with the
2250 DBG2("UST stream %d ready (handle: %d)", ua_chan
->streams
.count
,
2254 health_code_update(&health_thread_cmd
);
2257 switch (app
->bits_per_long
) {
2259 socket
= consumer_find_socket(uatomic_read(&ust_consumerd64_fd
),
2261 if (socket
== NULL
) {
2266 socket
= consumer_find_socket(uatomic_read(&ust_consumerd32_fd
),
2268 if (socket
== NULL
) {
2274 goto error_rcu_unlock
;
2277 /* Setup UST consumer socket and send fds to it */
2278 ret
= ust_consumer_send_session(ua_sess
, usess
->consumer
, socket
);
2280 goto error_rcu_unlock
;
2283 health_code_update(&health_thread_cmd
);
2286 /* This start the UST tracing */
2287 ret
= ustctl_start_session(app
->sock
, ua_sess
->handle
);
2289 ERR("Error starting tracing for app pid: %d", app
->pid
);
2290 goto error_rcu_unlock
;
2293 health_code_update(&health_thread_cmd
);
2295 /* Quiescent wait after starting trace */
2296 ustctl_wait_quiescent(app
->sock
);
2300 health_code_update(&health_thread_cmd
);
2305 health_code_update(&health_thread_cmd
);
2310 * Stop tracing for a specific UST session and app.
2312 int ust_app_stop_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
2315 struct lttng_ht_iter iter
;
2316 struct ust_app_session
*ua_sess
;
2317 struct ust_app_channel
*ua_chan
;
2319 DBG("Stopping tracing for ust app pid %d", app
->pid
);
2323 if (!app
->compatible
) {
2327 ua_sess
= lookup_session_by_app(usess
, app
);
2328 if (ua_sess
== NULL
) {
2329 /* Only malloc can failed so something is really wrong */
2330 goto error_rcu_unlock
;
2334 * If started = 0, it means that stop trace has been called for a session
2335 * that was never started. This is a code flow error and should never
2338 assert(ua_sess
->started
== 1);
2340 health_code_update(&health_thread_cmd
);
2342 /* This inhibits UST tracing */
2343 ret
= ustctl_stop_session(app
->sock
, ua_sess
->handle
);
2345 ERR("Error stopping tracing for app pid: %d", app
->pid
);
2346 goto error_rcu_unlock
;
2349 health_code_update(&health_thread_cmd
);
2351 /* Quiescent wait after stopping trace */
2352 ustctl_wait_quiescent(app
->sock
);
2354 health_code_update(&health_thread_cmd
);
2356 /* Flushing buffers */
2357 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
2359 health_code_update(&health_thread_cmd
);
2360 ret
= ustctl_sock_flush_buffer(app
->sock
, ua_chan
->obj
);
2362 ERR("UST app PID %d channel %s flush failed with ret %d",
2363 app
->pid
, ua_chan
->name
, ret
);
2364 /* Continuing flushing all buffers */
2369 health_code_update(&health_thread_cmd
);
2371 /* Flush all buffers before stopping */
2372 ret
= ustctl_sock_flush_buffer(app
->sock
, ua_sess
->metadata
->obj
);
2374 ERR("UST app PID %d metadata flush failed with ret %d", app
->pid
,
2380 health_code_update(&health_thread_cmd
);
2385 health_code_update(&health_thread_cmd
);
2390 * Destroy a specific UST session in apps.
2392 int ust_app_destroy_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
2394 struct ust_app_session
*ua_sess
;
2395 struct lttng_ust_object_data obj
;
2396 struct lttng_ht_iter iter
;
2397 struct lttng_ht_node_ulong
*node
;
2400 DBG("Destroy tracing for ust app pid %d", app
->pid
);
2404 if (!app
->compatible
) {
2408 __lookup_session_by_app(usess
, app
, &iter
);
2409 node
= lttng_ht_iter_get_node_ulong(&iter
);
2411 /* Only malloc can failed so something is really wrong */
2412 goto error_rcu_unlock
;
2414 ua_sess
= caa_container_of(node
, struct ust_app_session
, node
);
2415 ret
= lttng_ht_del(app
->sessions
, &iter
);
2417 obj
.handle
= ua_sess
->handle
;
2420 obj
.memory_map_size
= 0;
2421 health_code_update(&health_thread_cmd
);
2422 ustctl_release_object(app
->sock
, &obj
);
2424 health_code_update(&health_thread_cmd
);
2425 delete_ust_app_session(app
->sock
, ua_sess
);
2427 /* Quiescent wait after stopping trace */
2428 ustctl_wait_quiescent(app
->sock
);
2432 health_code_update(&health_thread_cmd
);
2437 health_code_update(&health_thread_cmd
);
2442 * Start tracing for the UST session.
2444 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
2447 struct lttng_ht_iter iter
;
2448 struct ust_app
*app
;
2450 DBG("Starting all UST traces");
2454 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2455 ret
= ust_app_start_trace(usess
, app
);
2457 /* Continue to next apps even on error */
2468 * Start tracing for the UST session.
2470 int ust_app_stop_trace_all(struct ltt_ust_session
*usess
)
2473 struct lttng_ht_iter iter
;
2474 struct ust_app
*app
;
2476 DBG("Stopping all UST traces");
2480 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2481 ret
= ust_app_stop_trace(usess
, app
);
2483 /* Continue to next apps even on error */
2494 * Destroy app UST session.
2496 int ust_app_destroy_trace_all(struct ltt_ust_session
*usess
)
2499 struct lttng_ht_iter iter
;
2500 struct ust_app
*app
;
2502 DBG("Destroy all UST traces");
2506 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2507 ret
= ust_app_destroy_trace(usess
, app
);
2509 /* Continue to next apps even on error */
2520 * Add channels/events from UST global domain to registered apps at sock.
2522 void ust_app_global_update(struct ltt_ust_session
*usess
, int sock
)
2525 struct lttng_ht_iter iter
, uiter
, iter_ctx
;
2526 struct ust_app
*app
;
2527 struct ust_app_session
*ua_sess
;
2528 struct ust_app_channel
*ua_chan
;
2529 struct ust_app_event
*ua_event
;
2530 struct ust_app_ctx
*ua_ctx
;
2532 if (usess
== NULL
) {
2533 ERR("No UST session on global update. Returning");
2537 DBG2("UST app global update for app sock %d for session id %d", sock
,
2542 app
= find_app_by_sock(sock
);
2544 ERR("Failed to update app sock %d", sock
);
2548 if (!app
->compatible
) {
2552 ua_sess
= create_ust_app_session(usess
, app
);
2553 if (ua_sess
== NULL
) {
2558 * We can iterate safely here over all UST app session sicne the create ust
2559 * app session above made a shadow copy of the UST global domain from the
2562 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
2564 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
2566 /* FIXME: Should we quit here or continue... */
2570 cds_lfht_for_each_entry(ua_chan
->ctx
->ht
, &iter_ctx
.iter
, ua_ctx
,
2572 ret
= create_ust_channel_context(ua_chan
, ua_ctx
, app
);
2574 /* FIXME: Should we quit here or continue... */
2580 /* For each events */
2581 cds_lfht_for_each_entry(ua_chan
->events
->ht
, &uiter
.iter
, ua_event
,
2583 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
2585 /* FIXME: Should we quit here or continue... */
2589 /* Add context on events. */
2590 cds_lfht_for_each_entry(ua_event
->ctx
->ht
, &iter_ctx
.iter
,
2591 ua_ctx
, node
.node
) {
2592 ret
= create_ust_event_context(ua_event
, ua_ctx
, app
);
2594 /* FIXME: Should we quit here or continue... */
2598 ret
= set_ust_event_filter(ua_event
, app
);
2600 /* FIXME: Should we quit here or continue... */
2606 if (usess
->start_trace
) {
2607 ret
= ust_app_start_trace(usess
, app
);
2612 DBG2("UST trace started for app pid %d", app
->pid
);
2621 * Add context to a specific channel for global UST domain.
2623 int ust_app_add_ctx_channel_glb(struct ltt_ust_session
*usess
,
2624 struct ltt_ust_channel
*uchan
, struct ltt_ust_context
*uctx
)
2627 struct lttng_ht_node_str
*ua_chan_node
;
2628 struct lttng_ht_iter iter
, uiter
;
2629 struct ust_app_channel
*ua_chan
= NULL
;
2630 struct ust_app_session
*ua_sess
;
2631 struct ust_app
*app
;
2635 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2636 if (!app
->compatible
) {
2638 * TODO: In time, we should notice the caller of this error by
2639 * telling him that this is a version error.
2643 ua_sess
= lookup_session_by_app(usess
, app
);
2644 if (ua_sess
== NULL
) {
2648 /* Lookup channel in the ust app session */
2649 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2650 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2651 if (ua_chan_node
== NULL
) {
2654 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
,
2657 ret
= create_ust_app_channel_context(ua_sess
, ua_chan
, &uctx
->ctx
, app
);
2668 * Add context to a specific event in a channel for global UST domain.
2670 int ust_app_add_ctx_event_glb(struct ltt_ust_session
*usess
,
2671 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
,
2672 struct ltt_ust_context
*uctx
)
2675 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2676 struct lttng_ht_iter iter
, uiter
;
2677 struct ust_app_session
*ua_sess
;
2678 struct ust_app_event
*ua_event
;
2679 struct ust_app_channel
*ua_chan
= NULL
;
2680 struct ust_app
*app
;
2684 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2685 if (!app
->compatible
) {
2687 * TODO: In time, we should notice the caller of this error by
2688 * telling him that this is a version error.
2692 ua_sess
= lookup_session_by_app(usess
, app
);
2693 if (ua_sess
== NULL
) {
2697 /* Lookup channel in the ust app session */
2698 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2699 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2700 if (ua_chan_node
== NULL
) {
2703 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
,
2706 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &uiter
);
2707 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
2708 if (ua_event_node
== NULL
) {
2711 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
,
2714 ret
= create_ust_app_event_context(ua_sess
, ua_event
, &uctx
->ctx
, app
);
2725 * Add context to a specific event in a channel for global UST domain.
2727 int ust_app_set_filter_event_glb(struct ltt_ust_session
*usess
,
2728 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
,
2729 struct lttng_filter_bytecode
*bytecode
)
2732 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2733 struct lttng_ht_iter iter
, uiter
;
2734 struct ust_app_session
*ua_sess
;
2735 struct ust_app_event
*ua_event
;
2736 struct ust_app_channel
*ua_chan
= NULL
;
2737 struct ust_app
*app
;
2741 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2742 if (!app
->compatible
) {
2744 * TODO: In time, we should notice the caller of this error by
2745 * telling him that this is a version error.
2749 ua_sess
= lookup_session_by_app(usess
, app
);
2750 if (ua_sess
== NULL
) {
2754 /* Lookup channel in the ust app session */
2755 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2756 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2757 if (ua_chan_node
== NULL
) {
2760 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
,
2763 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &uiter
);
2764 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
2765 if (ua_event_node
== NULL
) {
2768 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
,
2771 ret
= set_ust_app_event_filter(ua_sess
, ua_event
, bytecode
, app
);
2782 * Enable event for a channel from a UST session for a specific PID.
2784 int ust_app_enable_event_pid(struct ltt_ust_session
*usess
,
2785 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
, pid_t pid
)
2788 struct lttng_ht_iter iter
;
2789 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2790 struct ust_app
*app
;
2791 struct ust_app_session
*ua_sess
;
2792 struct ust_app_channel
*ua_chan
;
2793 struct ust_app_event
*ua_event
;
2795 DBG("UST app enabling event %s for PID %d", uevent
->attr
.name
, pid
);
2799 app
= ust_app_find_by_pid(pid
);
2801 ERR("UST app enable event per PID %d not found", pid
);
2806 if (!app
->compatible
) {
2811 ua_sess
= lookup_session_by_app(usess
, app
);
2812 /* If ua_sess is NULL, there is a code flow error */
2815 /* Lookup channel in the ust app session */
2816 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
2817 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
2818 /* If the channel is not found, there is a code flow error */
2819 assert(ua_chan_node
);
2821 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2823 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &iter
);
2824 ua_event_node
= lttng_ht_iter_get_node_str(&iter
);
2825 if (ua_event_node
== NULL
) {
2826 ret
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
2831 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
2833 ret
= enable_ust_app_event(ua_sess
, ua_event
, app
);
2845 * Disable event for a channel from a UST session for a specific PID.
2847 int ust_app_disable_event_pid(struct ltt_ust_session
*usess
,
2848 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
, pid_t pid
)
2851 struct lttng_ht_iter iter
;
2852 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2853 struct ust_app
*app
;
2854 struct ust_app_session
*ua_sess
;
2855 struct ust_app_channel
*ua_chan
;
2856 struct ust_app_event
*ua_event
;
2858 DBG("UST app disabling event %s for PID %d", uevent
->attr
.name
, pid
);
2862 app
= ust_app_find_by_pid(pid
);
2864 ERR("UST app disable event per PID %d not found", pid
);
2869 if (!app
->compatible
) {
2874 ua_sess
= lookup_session_by_app(usess
, app
);
2875 /* If ua_sess is NULL, there is a code flow error */
2878 /* Lookup channel in the ust app session */
2879 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
2880 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
2881 if (ua_chan_node
== NULL
) {
2882 /* Channel does not exist, skip disabling */
2885 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2887 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &iter
);
2888 ua_event_node
= lttng_ht_iter_get_node_str(&iter
);
2889 if (ua_event_node
== NULL
) {
2890 /* Event does not exist, skip disabling */
2893 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
2895 ret
= disable_ust_app_event(ua_sess
, ua_event
, app
);
2906 * Validate version of UST apps and set the compatible bit.
2908 int ust_app_validate_version(int sock
)
2911 struct ust_app
*app
;
2915 app
= find_app_by_sock(sock
);
2918 health_code_update(&health_thread_cmd
);
2920 ret
= ustctl_tracer_version(sock
, &app
->version
);
2925 /* Validate version */
2926 if (app
->version
.major
!= UST_APP_MAJOR_VERSION
) {
2930 DBG2("UST app PID %d is compatible with internal major version %d "
2931 "(supporting == %d)", app
->pid
, app
->version
.major
,
2932 UST_APP_MAJOR_VERSION
);
2933 app
->compatible
= 1;
2935 health_code_update(&health_thread_cmd
);
2939 DBG2("UST app PID %d is not compatible with internal major version %d "
2940 "(supporting == %d)", app
->pid
, app
->version
.major
,
2941 UST_APP_MAJOR_VERSION
);
2942 app
->compatible
= 0;
2944 health_code_update(&health_thread_cmd
);
2949 * Calibrate registered applications.
2951 int ust_app_calibrate_glb(struct lttng_ust_calibrate
*calibrate
)
2954 struct lttng_ht_iter iter
;
2955 struct ust_app
*app
;
2959 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2960 if (!app
->compatible
) {
2962 * TODO: In time, we should notice the caller of this error by
2963 * telling him that this is a version error.
2968 health_code_update(&health_thread_cmd
);
2970 ret
= ustctl_calibrate(app
->sock
, calibrate
);
2974 /* Means that it's not implemented on the tracer side. */
2978 /* TODO: Report error to user */
2979 DBG2("Calibrate app PID %d returned with error %d",
2986 DBG("UST app global domain calibration finished");
2990 health_code_update(&health_thread_cmd
);