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
;
1670 tmp
[count
].written
= uiter
.written
;
1672 memcpy(tmp
[count
].event
.name
, uiter
.event_name
, LTTNG_UST_SYM_NAME_LEN
);
1673 tmp
[count
].event
.loglevel
= uiter
.loglevel
;
1674 tmp
[count
].event
.type
= LTTNG_UST_TRACEPOINT
;
1675 tmp
[count
].event
.pid
= app
->pid
;
1676 tmp
[count
].event
.enabled
= -1;
1684 DBG2("UST app list event fields done (%zu events)", count
);
1689 health_code_update(&health_thread_cmd
);
1694 * Free and clean all traceable apps of the global list.
1696 void ust_app_clean_list(void)
1699 struct lttng_ht_iter iter
;
1700 struct lttng_ht_node_ulong
*node
;
1702 DBG2("UST app cleaning registered apps hash table");
1706 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, node
, node
) {
1707 ret
= lttng_ht_del(ust_app_ht
, &iter
);
1709 call_rcu(&node
->head
, delete_ust_app_rcu
);
1712 /* Cleanup socket hash table */
1713 cds_lfht_for_each_entry(ust_app_ht_by_sock
->ht
, &iter
.iter
, node
, node
) {
1714 ret
= lttng_ht_del(ust_app_ht_by_sock
, &iter
);
1718 /* Destroy is done only when the ht is empty */
1719 lttng_ht_destroy(ust_app_ht
);
1720 lttng_ht_destroy(ust_app_ht_by_sock
);
1726 * Init UST app hash table.
1728 void ust_app_ht_alloc(void)
1730 ust_app_ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
1731 ust_app_ht_by_sock
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
1735 * For a specific UST session, disable the channel for all registered apps.
1737 int ust_app_disable_channel_glb(struct ltt_ust_session
*usess
,
1738 struct ltt_ust_channel
*uchan
)
1741 struct lttng_ht_iter iter
;
1742 struct lttng_ht_node_str
*ua_chan_node
;
1743 struct ust_app
*app
;
1744 struct ust_app_session
*ua_sess
;
1745 struct ust_app_channel
*ua_chan
;
1747 if (usess
== NULL
|| uchan
== NULL
) {
1748 ERR("Disabling UST global channel with NULL values");
1753 DBG2("UST app disabling channel %s from global domain for session id %d",
1754 uchan
->name
, usess
->id
);
1758 /* For every registered applications */
1759 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1760 struct lttng_ht_iter uiter
;
1761 if (!app
->compatible
) {
1763 * TODO: In time, we should notice the caller of this error by
1764 * telling him that this is a version error.
1768 ua_sess
= lookup_session_by_app(usess
, app
);
1769 if (ua_sess
== NULL
) {
1774 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1775 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1776 /* If the session if found for the app, the channel must be there */
1777 assert(ua_chan_node
);
1779 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1780 /* The channel must not be already disabled */
1781 assert(ua_chan
->enabled
== 1);
1783 /* Disable channel onto application */
1784 ret
= disable_ust_app_channel(ua_sess
, ua_chan
, app
);
1786 /* XXX: We might want to report this error at some point... */
1798 * For a specific UST session, enable the channel for all registered apps.
1800 int ust_app_enable_channel_glb(struct ltt_ust_session
*usess
,
1801 struct ltt_ust_channel
*uchan
)
1804 struct lttng_ht_iter iter
;
1805 struct ust_app
*app
;
1806 struct ust_app_session
*ua_sess
;
1808 if (usess
== NULL
|| uchan
== NULL
) {
1809 ERR("Adding UST global channel to NULL values");
1814 DBG2("UST app enabling channel %s to global domain for session id %d",
1815 uchan
->name
, usess
->id
);
1819 /* For every registered applications */
1820 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1821 if (!app
->compatible
) {
1823 * TODO: In time, we should notice the caller of this error by
1824 * telling him that this is a version error.
1828 ua_sess
= lookup_session_by_app(usess
, app
);
1829 if (ua_sess
== NULL
) {
1833 /* Enable channel onto application */
1834 ret
= enable_ust_app_channel(ua_sess
, uchan
, app
);
1836 /* XXX: We might want to report this error at some point... */
1848 * Disable an event in a channel and for a specific session.
1850 int ust_app_disable_event_glb(struct ltt_ust_session
*usess
,
1851 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
1854 struct lttng_ht_iter iter
, uiter
;
1855 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
1856 struct ust_app
*app
;
1857 struct ust_app_session
*ua_sess
;
1858 struct ust_app_channel
*ua_chan
;
1859 struct ust_app_event
*ua_event
;
1861 DBG("UST app disabling event %s for all apps in channel "
1862 "%s for session id %d", uevent
->attr
.name
, uchan
->name
, usess
->id
);
1866 /* For all registered applications */
1867 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1868 if (!app
->compatible
) {
1870 * TODO: In time, we should notice the caller of this error by
1871 * telling him that this is a version error.
1875 ua_sess
= lookup_session_by_app(usess
, app
);
1876 if (ua_sess
== NULL
) {
1881 /* Lookup channel in the ust app session */
1882 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1883 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1884 if (ua_chan_node
== NULL
) {
1885 DBG2("Channel %s not found in session id %d for app pid %d."
1886 "Skipping", uchan
->name
, usess
->id
, app
->pid
);
1889 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1891 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &uiter
);
1892 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
1893 if (ua_event_node
== NULL
) {
1894 DBG2("Event %s not found in channel %s for app pid %d."
1895 "Skipping", uevent
->attr
.name
, uchan
->name
, app
->pid
);
1898 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
1900 ret
= disable_ust_app_event(ua_sess
, ua_event
, app
);
1902 /* XXX: Report error someday... */
1913 * For a specific UST session and UST channel, the event for all
1916 int ust_app_disable_all_event_glb(struct ltt_ust_session
*usess
,
1917 struct ltt_ust_channel
*uchan
)
1920 struct lttng_ht_iter iter
, uiter
;
1921 struct lttng_ht_node_str
*ua_chan_node
;
1922 struct ust_app
*app
;
1923 struct ust_app_session
*ua_sess
;
1924 struct ust_app_channel
*ua_chan
;
1925 struct ust_app_event
*ua_event
;
1927 DBG("UST app disabling all event for all apps in channel "
1928 "%s for session id %d", uchan
->name
, usess
->id
);
1932 /* For all registered applications */
1933 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1934 if (!app
->compatible
) {
1936 * TODO: In time, we should notice the caller of this error by
1937 * telling him that this is a version error.
1941 ua_sess
= lookup_session_by_app(usess
, app
);
1942 /* If ua_sess is NULL, there is a code flow error */
1945 /* Lookup channel in the ust app session */
1946 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
1947 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
1948 /* If the channel is not found, there is a code flow error */
1949 assert(ua_chan_node
);
1951 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1953 /* Disable each events of channel */
1954 cds_lfht_for_each_entry(ua_chan
->events
->ht
, &uiter
.iter
, ua_event
,
1956 ret
= disable_ust_app_event(ua_sess
, ua_event
, app
);
1958 /* XXX: Report error someday... */
1970 * For a specific UST session, create the channel for all registered apps.
1972 int ust_app_create_channel_glb(struct ltt_ust_session
*usess
,
1973 struct ltt_ust_channel
*uchan
)
1975 struct lttng_ht_iter iter
;
1976 struct ust_app
*app
;
1977 struct ust_app_session
*ua_sess
;
1978 struct ust_app_channel
*ua_chan
;
1980 /* Very wrong code flow */
1984 DBG2("UST app adding channel %s to global domain for session id %d",
1985 uchan
->name
, usess
->id
);
1989 /* For every registered applications */
1990 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
1991 if (!app
->compatible
) {
1993 * TODO: In time, we should notice the caller of this error by
1994 * telling him that this is a version error.
1999 * Create session on the tracer side and add it to app session HT. Note
2000 * that if session exist, it will simply return a pointer to the ust
2003 ua_sess
= create_ust_app_session(usess
, app
);
2004 if (ua_sess
== NULL
) {
2005 /* The malloc() failed. */
2007 } else if (ua_sess
== (void *) -1UL) {
2008 /* The application's socket is not valid. Contiuing */
2012 /* Create channel onto application */
2013 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
2014 if (ua_chan
== NULL
) {
2015 /* Major problem here and it's maybe the tracer or malloc() */
2029 * Enable event for a specific session and channel on the tracer.
2031 int ust_app_enable_event_glb(struct ltt_ust_session
*usess
,
2032 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
2035 struct lttng_ht_iter iter
, uiter
;
2036 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2037 struct ust_app
*app
;
2038 struct ust_app_session
*ua_sess
;
2039 struct ust_app_channel
*ua_chan
;
2040 struct ust_app_event
*ua_event
;
2042 DBG("UST app enabling event %s for all apps for session id %d",
2043 uevent
->attr
.name
, usess
->id
);
2046 * NOTE: At this point, this function is called only if the session and
2047 * channel passed are already created for all apps. and enabled on the
2053 /* For all registered applications */
2054 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2055 if (!app
->compatible
) {
2057 * TODO: In time, we should notice the caller of this error by
2058 * telling him that this is a version error.
2062 ua_sess
= lookup_session_by_app(usess
, app
);
2063 /* If ua_sess is NULL, there is a code flow error */
2066 /* Lookup channel in the ust app session */
2067 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2068 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2069 /* If the channel is not found, there is a code flow error */
2070 assert(ua_chan_node
);
2072 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2074 lttng_ht_lookup(ua_chan
->events
, (void*)uevent
->attr
.name
, &uiter
);
2075 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
2076 if (ua_event_node
== NULL
) {
2077 DBG3("UST app enable event %s not found for app PID %d."
2078 "Skipping app", uevent
->attr
.name
, app
->pid
);
2081 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
2083 ret
= enable_ust_app_event(ua_sess
, ua_event
, app
);
2095 * For a specific existing UST session and UST channel, creates the event for
2096 * all registered apps.
2098 int ust_app_create_event_glb(struct ltt_ust_session
*usess
,
2099 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
2102 struct lttng_ht_iter iter
, uiter
;
2103 struct lttng_ht_node_str
*ua_chan_node
;
2104 struct ust_app
*app
;
2105 struct ust_app_session
*ua_sess
;
2106 struct ust_app_channel
*ua_chan
;
2108 DBG("UST app creating event %s for all apps for session id %d",
2109 uevent
->attr
.name
, usess
->id
);
2113 /* For all registered applications */
2114 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2115 if (!app
->compatible
) {
2117 * TODO: In time, we should notice the caller of this error by
2118 * telling him that this is a version error.
2122 ua_sess
= lookup_session_by_app(usess
, app
);
2123 /* If ua_sess is NULL, there is a code flow error */
2126 /* Lookup channel in the ust app session */
2127 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2128 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2129 /* If the channel is not found, there is a code flow error */
2130 assert(ua_chan_node
);
2132 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2134 ret
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
2136 if (ret
!= -EEXIST
) {
2137 /* Possible value at this point: -ENOMEM. If so, we stop! */
2140 DBG2("UST app event %s already exist on app PID %d",
2141 uevent
->attr
.name
, app
->pid
);
2152 * Start tracing for a specific UST session and app.
2154 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
2157 struct lttng_ht_iter iter
;
2158 struct ust_app_session
*ua_sess
;
2159 struct ust_app_channel
*ua_chan
;
2160 struct ltt_ust_stream
*ustream
;
2161 struct consumer_socket
*socket
;
2163 DBG("Starting tracing for ust app pid %d", app
->pid
);
2167 if (!app
->compatible
) {
2171 ua_sess
= lookup_session_by_app(usess
, app
);
2172 if (ua_sess
== NULL
) {
2173 goto error_rcu_unlock
;
2176 /* Upon restart, we skip the setup, already done */
2177 if (ua_sess
->started
) {
2181 /* Create directories if consumer is LOCAL and has a path defined. */
2182 if (usess
->consumer
->type
== CONSUMER_DST_LOCAL
&&
2183 strlen(usess
->consumer
->dst
.trace_path
) > 0) {
2184 ret
= run_as_mkdir_recursive(usess
->consumer
->dst
.trace_path
,
2185 S_IRWXU
| S_IRWXG
, usess
->uid
, usess
->gid
);
2187 if (ret
!= -EEXIST
) {
2188 ERR("Trace directory creation error");
2190 goto error_rcu_unlock
;
2195 /* Indicate that the session has been started once */
2196 ua_sess
->started
= 1;
2198 ret
= create_ust_app_metadata(ua_sess
, usess
->pathname
, app
);
2200 ret
= LTTNG_ERR_UST_META_FAIL
;
2201 goto error_rcu_unlock
;
2204 /* For each channel */
2205 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
2207 /* Create all streams */
2209 /* Create UST stream */
2210 ustream
= zmalloc(sizeof(*ustream
));
2211 if (ustream
== NULL
) {
2212 PERROR("zmalloc ust stream");
2213 goto error_rcu_unlock
;
2216 /* We are going to receive 2 fds, we need to reserve them. */
2217 ret
= lttng_fd_get(LTTNG_FD_APPS
, 2);
2219 ERR("Exhausted number of available FD upon stream create");
2221 goto error_rcu_unlock
;
2224 health_code_update(&health_thread_cmd
);
2226 ret
= ustctl_create_stream(app
->sock
, ua_chan
->obj
,
2229 /* Got all streams */
2230 lttng_fd_put(LTTNG_FD_APPS
, 2);
2232 ret
= LTTNG_ERR_UST_STREAM_FAIL
;
2235 ustream
->handle
= ustream
->obj
->handle
;
2237 health_code_update(&health_thread_cmd
);
2239 /* Order is important */
2240 cds_list_add_tail(&ustream
->list
, &ua_chan
->streams
.head
);
2241 ret
= snprintf(ustream
->name
, sizeof(ustream
->name
), "%s_%u",
2242 ua_chan
->name
, ua_chan
->streams
.count
++);
2244 PERROR("asprintf UST create stream");
2246 * XXX what should we do here with the
2251 DBG2("UST stream %d ready (handle: %d)", ua_chan
->streams
.count
,
2255 health_code_update(&health_thread_cmd
);
2258 switch (app
->bits_per_long
) {
2260 socket
= consumer_find_socket(uatomic_read(&ust_consumerd64_fd
),
2262 if (socket
== NULL
) {
2267 socket
= consumer_find_socket(uatomic_read(&ust_consumerd32_fd
),
2269 if (socket
== NULL
) {
2275 goto error_rcu_unlock
;
2278 /* Setup UST consumer socket and send fds to it */
2279 ret
= ust_consumer_send_session(ua_sess
, usess
->consumer
, socket
);
2281 goto error_rcu_unlock
;
2284 health_code_update(&health_thread_cmd
);
2287 /* This start the UST tracing */
2288 ret
= ustctl_start_session(app
->sock
, ua_sess
->handle
);
2290 ERR("Error starting tracing for app pid: %d", app
->pid
);
2291 goto error_rcu_unlock
;
2294 health_code_update(&health_thread_cmd
);
2296 /* Quiescent wait after starting trace */
2297 ustctl_wait_quiescent(app
->sock
);
2301 health_code_update(&health_thread_cmd
);
2306 health_code_update(&health_thread_cmd
);
2311 * Stop tracing for a specific UST session and app.
2313 int ust_app_stop_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
2316 struct lttng_ht_iter iter
;
2317 struct ust_app_session
*ua_sess
;
2318 struct ust_app_channel
*ua_chan
;
2320 DBG("Stopping tracing for ust app pid %d", app
->pid
);
2324 if (!app
->compatible
) {
2328 ua_sess
= lookup_session_by_app(usess
, app
);
2329 if (ua_sess
== NULL
) {
2330 /* Only malloc can failed so something is really wrong */
2331 goto error_rcu_unlock
;
2335 * If started = 0, it means that stop trace has been called for a session
2336 * that was never started. This is a code flow error and should never
2339 assert(ua_sess
->started
== 1);
2341 health_code_update(&health_thread_cmd
);
2343 /* This inhibits UST tracing */
2344 ret
= ustctl_stop_session(app
->sock
, ua_sess
->handle
);
2346 ERR("Error stopping tracing for app pid: %d", app
->pid
);
2347 goto error_rcu_unlock
;
2350 health_code_update(&health_thread_cmd
);
2352 /* Quiescent wait after stopping trace */
2353 ustctl_wait_quiescent(app
->sock
);
2355 health_code_update(&health_thread_cmd
);
2357 /* Flushing buffers */
2358 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
2360 health_code_update(&health_thread_cmd
);
2361 ret
= ustctl_sock_flush_buffer(app
->sock
, ua_chan
->obj
);
2363 ERR("UST app PID %d channel %s flush failed with ret %d",
2364 app
->pid
, ua_chan
->name
, ret
);
2365 /* Continuing flushing all buffers */
2370 health_code_update(&health_thread_cmd
);
2372 /* Flush all buffers before stopping */
2373 ret
= ustctl_sock_flush_buffer(app
->sock
, ua_sess
->metadata
->obj
);
2375 ERR("UST app PID %d metadata flush failed with ret %d", app
->pid
,
2381 health_code_update(&health_thread_cmd
);
2386 health_code_update(&health_thread_cmd
);
2391 * Destroy a specific UST session in apps.
2393 int ust_app_destroy_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
2395 struct ust_app_session
*ua_sess
;
2396 struct lttng_ust_object_data obj
;
2397 struct lttng_ht_iter iter
;
2398 struct lttng_ht_node_ulong
*node
;
2401 DBG("Destroy tracing for ust app pid %d", app
->pid
);
2405 if (!app
->compatible
) {
2409 __lookup_session_by_app(usess
, app
, &iter
);
2410 node
= lttng_ht_iter_get_node_ulong(&iter
);
2412 /* Only malloc can failed so something is really wrong */
2413 goto error_rcu_unlock
;
2415 ua_sess
= caa_container_of(node
, struct ust_app_session
, node
);
2416 ret
= lttng_ht_del(app
->sessions
, &iter
);
2418 obj
.handle
= ua_sess
->handle
;
2421 obj
.memory_map_size
= 0;
2422 health_code_update(&health_thread_cmd
);
2423 ustctl_release_object(app
->sock
, &obj
);
2425 health_code_update(&health_thread_cmd
);
2426 delete_ust_app_session(app
->sock
, ua_sess
);
2428 /* Quiescent wait after stopping trace */
2429 ustctl_wait_quiescent(app
->sock
);
2433 health_code_update(&health_thread_cmd
);
2438 health_code_update(&health_thread_cmd
);
2443 * Start tracing for the UST session.
2445 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
2448 struct lttng_ht_iter iter
;
2449 struct ust_app
*app
;
2451 DBG("Starting all UST traces");
2455 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2456 ret
= ust_app_start_trace(usess
, app
);
2458 /* Continue to next apps even on error */
2469 * Start tracing for the UST session.
2471 int ust_app_stop_trace_all(struct ltt_ust_session
*usess
)
2474 struct lttng_ht_iter iter
;
2475 struct ust_app
*app
;
2477 DBG("Stopping all UST traces");
2481 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2482 ret
= ust_app_stop_trace(usess
, app
);
2484 /* Continue to next apps even on error */
2495 * Destroy app UST session.
2497 int ust_app_destroy_trace_all(struct ltt_ust_session
*usess
)
2500 struct lttng_ht_iter iter
;
2501 struct ust_app
*app
;
2503 DBG("Destroy all UST traces");
2507 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2508 ret
= ust_app_destroy_trace(usess
, app
);
2510 /* Continue to next apps even on error */
2521 * Add channels/events from UST global domain to registered apps at sock.
2523 void ust_app_global_update(struct ltt_ust_session
*usess
, int sock
)
2526 struct lttng_ht_iter iter
, uiter
, iter_ctx
;
2527 struct ust_app
*app
;
2528 struct ust_app_session
*ua_sess
;
2529 struct ust_app_channel
*ua_chan
;
2530 struct ust_app_event
*ua_event
;
2531 struct ust_app_ctx
*ua_ctx
;
2533 if (usess
== NULL
) {
2534 ERR("No UST session on global update. Returning");
2538 DBG2("UST app global update for app sock %d for session id %d", sock
,
2543 app
= find_app_by_sock(sock
);
2545 ERR("Failed to update app sock %d", sock
);
2549 if (!app
->compatible
) {
2553 ua_sess
= create_ust_app_session(usess
, app
);
2554 if (ua_sess
== NULL
) {
2559 * We can iterate safely here over all UST app session sicne the create ust
2560 * app session above made a shadow copy of the UST global domain from the
2563 cds_lfht_for_each_entry(ua_sess
->channels
->ht
, &iter
.iter
, ua_chan
,
2565 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
2567 /* FIXME: Should we quit here or continue... */
2571 cds_lfht_for_each_entry(ua_chan
->ctx
->ht
, &iter_ctx
.iter
, ua_ctx
,
2573 ret
= create_ust_channel_context(ua_chan
, ua_ctx
, app
);
2575 /* FIXME: Should we quit here or continue... */
2581 /* For each events */
2582 cds_lfht_for_each_entry(ua_chan
->events
->ht
, &uiter
.iter
, ua_event
,
2584 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
2586 /* FIXME: Should we quit here or continue... */
2590 /* Add context on events. */
2591 cds_lfht_for_each_entry(ua_event
->ctx
->ht
, &iter_ctx
.iter
,
2592 ua_ctx
, node
.node
) {
2593 ret
= create_ust_event_context(ua_event
, ua_ctx
, app
);
2595 /* FIXME: Should we quit here or continue... */
2599 ret
= set_ust_event_filter(ua_event
, app
);
2601 /* FIXME: Should we quit here or continue... */
2607 if (usess
->start_trace
) {
2608 ret
= ust_app_start_trace(usess
, app
);
2613 DBG2("UST trace started for app pid %d", app
->pid
);
2622 * Add context to a specific channel for global UST domain.
2624 int ust_app_add_ctx_channel_glb(struct ltt_ust_session
*usess
,
2625 struct ltt_ust_channel
*uchan
, struct ltt_ust_context
*uctx
)
2628 struct lttng_ht_node_str
*ua_chan_node
;
2629 struct lttng_ht_iter iter
, uiter
;
2630 struct ust_app_channel
*ua_chan
= NULL
;
2631 struct ust_app_session
*ua_sess
;
2632 struct ust_app
*app
;
2636 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2637 if (!app
->compatible
) {
2639 * TODO: In time, we should notice the caller of this error by
2640 * telling him that this is a version error.
2644 ua_sess
= lookup_session_by_app(usess
, app
);
2645 if (ua_sess
== NULL
) {
2649 /* Lookup channel in the ust app session */
2650 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2651 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2652 if (ua_chan_node
== NULL
) {
2655 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
,
2658 ret
= create_ust_app_channel_context(ua_sess
, ua_chan
, &uctx
->ctx
, app
);
2669 * Add context to a specific event in a channel for global UST domain.
2671 int ust_app_add_ctx_event_glb(struct ltt_ust_session
*usess
,
2672 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
,
2673 struct ltt_ust_context
*uctx
)
2676 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2677 struct lttng_ht_iter iter
, uiter
;
2678 struct ust_app_session
*ua_sess
;
2679 struct ust_app_event
*ua_event
;
2680 struct ust_app_channel
*ua_chan
= NULL
;
2681 struct ust_app
*app
;
2685 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2686 if (!app
->compatible
) {
2688 * TODO: In time, we should notice the caller of this error by
2689 * telling him that this is a version error.
2693 ua_sess
= lookup_session_by_app(usess
, app
);
2694 if (ua_sess
== NULL
) {
2698 /* Lookup channel in the ust app session */
2699 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2700 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2701 if (ua_chan_node
== NULL
) {
2704 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
,
2707 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &uiter
);
2708 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
2709 if (ua_event_node
== NULL
) {
2712 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
,
2715 ret
= create_ust_app_event_context(ua_sess
, ua_event
, &uctx
->ctx
, app
);
2726 * Add context to a specific event in a channel for global UST domain.
2728 int ust_app_set_filter_event_glb(struct ltt_ust_session
*usess
,
2729 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
,
2730 struct lttng_filter_bytecode
*bytecode
)
2733 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2734 struct lttng_ht_iter iter
, uiter
;
2735 struct ust_app_session
*ua_sess
;
2736 struct ust_app_event
*ua_event
;
2737 struct ust_app_channel
*ua_chan
= NULL
;
2738 struct ust_app
*app
;
2742 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2743 if (!app
->compatible
) {
2745 * TODO: In time, we should notice the caller of this error by
2746 * telling him that this is a version error.
2750 ua_sess
= lookup_session_by_app(usess
, app
);
2751 if (ua_sess
== NULL
) {
2755 /* Lookup channel in the ust app session */
2756 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &uiter
);
2757 ua_chan_node
= lttng_ht_iter_get_node_str(&uiter
);
2758 if (ua_chan_node
== NULL
) {
2761 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
,
2764 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &uiter
);
2765 ua_event_node
= lttng_ht_iter_get_node_str(&uiter
);
2766 if (ua_event_node
== NULL
) {
2769 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
,
2772 ret
= set_ust_app_event_filter(ua_sess
, ua_event
, bytecode
, app
);
2783 * Enable event for a channel from a UST session for a specific PID.
2785 int ust_app_enable_event_pid(struct ltt_ust_session
*usess
,
2786 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
, pid_t pid
)
2789 struct lttng_ht_iter iter
;
2790 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2791 struct ust_app
*app
;
2792 struct ust_app_session
*ua_sess
;
2793 struct ust_app_channel
*ua_chan
;
2794 struct ust_app_event
*ua_event
;
2796 DBG("UST app enabling event %s for PID %d", uevent
->attr
.name
, pid
);
2800 app
= ust_app_find_by_pid(pid
);
2802 ERR("UST app enable event per PID %d not found", pid
);
2807 if (!app
->compatible
) {
2812 ua_sess
= lookup_session_by_app(usess
, app
);
2813 /* If ua_sess is NULL, there is a code flow error */
2816 /* Lookup channel in the ust app session */
2817 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
2818 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
2819 /* If the channel is not found, there is a code flow error */
2820 assert(ua_chan_node
);
2822 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2824 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &iter
);
2825 ua_event_node
= lttng_ht_iter_get_node_str(&iter
);
2826 if (ua_event_node
== NULL
) {
2827 ret
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
2832 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
2834 ret
= enable_ust_app_event(ua_sess
, ua_event
, app
);
2846 * Disable event for a channel from a UST session for a specific PID.
2848 int ust_app_disable_event_pid(struct ltt_ust_session
*usess
,
2849 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
, pid_t pid
)
2852 struct lttng_ht_iter iter
;
2853 struct lttng_ht_node_str
*ua_chan_node
, *ua_event_node
;
2854 struct ust_app
*app
;
2855 struct ust_app_session
*ua_sess
;
2856 struct ust_app_channel
*ua_chan
;
2857 struct ust_app_event
*ua_event
;
2859 DBG("UST app disabling event %s for PID %d", uevent
->attr
.name
, pid
);
2863 app
= ust_app_find_by_pid(pid
);
2865 ERR("UST app disable event per PID %d not found", pid
);
2870 if (!app
->compatible
) {
2875 ua_sess
= lookup_session_by_app(usess
, app
);
2876 /* If ua_sess is NULL, there is a code flow error */
2879 /* Lookup channel in the ust app session */
2880 lttng_ht_lookup(ua_sess
->channels
, (void *)uchan
->name
, &iter
);
2881 ua_chan_node
= lttng_ht_iter_get_node_str(&iter
);
2882 if (ua_chan_node
== NULL
) {
2883 /* Channel does not exist, skip disabling */
2886 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
2888 lttng_ht_lookup(ua_chan
->events
, (void *)uevent
->attr
.name
, &iter
);
2889 ua_event_node
= lttng_ht_iter_get_node_str(&iter
);
2890 if (ua_event_node
== NULL
) {
2891 /* Event does not exist, skip disabling */
2894 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
2896 ret
= disable_ust_app_event(ua_sess
, ua_event
, app
);
2907 * Validate version of UST apps and set the compatible bit.
2909 int ust_app_validate_version(int sock
)
2912 struct ust_app
*app
;
2916 app
= find_app_by_sock(sock
);
2919 health_code_update(&health_thread_cmd
);
2921 ret
= ustctl_tracer_version(sock
, &app
->version
);
2926 /* Validate version */
2927 if (app
->version
.major
!= UST_APP_MAJOR_VERSION
) {
2931 DBG2("UST app PID %d is compatible with internal major version %d "
2932 "(supporting == %d)", app
->pid
, app
->version
.major
,
2933 UST_APP_MAJOR_VERSION
);
2934 app
->compatible
= 1;
2936 health_code_update(&health_thread_cmd
);
2940 DBG2("UST app PID %d is not compatible with internal major version %d "
2941 "(supporting == %d)", app
->pid
, app
->version
.major
,
2942 UST_APP_MAJOR_VERSION
);
2943 app
->compatible
= 0;
2945 health_code_update(&health_thread_cmd
);
2950 * Calibrate registered applications.
2952 int ust_app_calibrate_glb(struct lttng_ust_calibrate
*calibrate
)
2955 struct lttng_ht_iter iter
;
2956 struct ust_app
*app
;
2960 cds_lfht_for_each_entry(ust_app_ht
->ht
, &iter
.iter
, app
, pid_n
.node
) {
2961 if (!app
->compatible
) {
2963 * TODO: In time, we should notice the caller of this error by
2964 * telling him that this is a version error.
2969 health_code_update(&health_thread_cmd
);
2971 ret
= ustctl_calibrate(app
->sock
, calibrate
);
2975 /* Means that it's not implemented on the tracer side. */
2979 /* TODO: Report error to user */
2980 DBG2("Calibrate app PID %d returned with error %d",
2987 DBG("UST app global domain calibration finished");
2991 health_code_update(&health_thread_cmd
);