2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
4 * This program is free software; you can redistribute it and/or
5 * modify it under the terms of the GNU General Public License
6 * as published by the Free Software Foundation; only version 2
9 * This program is distributed in the hope that it will be useful,
10 * but WITHOUT ANY WARRANTY; without even the implied warranty of
11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 * GNU General Public License for more details.
14 * You should have received a copy of the GNU General Public License
15 * along with this program; if not, write to the Free Software
16 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
26 #include <sys/types.h>
30 #include <lttng-share.h>
32 #include "hashtable.h"
34 #include "ust-consumer.h"
38 * Delete ust app event safely. RCU read lock must be held before calling
41 static void delete_ust_app_event(int sock
, struct ust_app_event
*ua_event
)
43 /* TODO : remove context */
44 //struct ust_app_ctx *ltctx;
45 //cds_lfht_for_each_entry(lte->ctx, &iter, ltctx, node) {
46 // delete_ust_app_ctx(sock, ltctx);
49 ustctl_release_object(sock
, ua_event
->obj
);
54 * Delete ust app stream safely. RCU read lock must be held before calling
57 static void delete_ust_app_stream(int sock
, struct ltt_ust_stream
*stream
)
60 //stream is used for passing to consumer.
61 //send_channel_streams is responsible for freeing the streams.
62 //note that this will not play well with flight recorder mode:
63 //we might need a criterion to discard the streams.
67 * Delete ust app channel safely. RCU read lock must be held before calling
70 static void delete_ust_app_channel(int sock
, struct ust_app_channel
*ua_chan
)
73 struct cds_lfht_iter iter
;
74 struct ust_app_event
*ua_event
;
75 struct ltt_ust_stream
*stream
, *stmp
;
77 cds_list_for_each_entry_safe(stream
, stmp
, &ua_chan
->streams
.head
, list
) {
78 delete_ust_app_stream(sock
, stream
);
81 /* TODO : remove channel context */
82 //cds_lfht_for_each_entry(ltc->ctx, &iter, ltctx, node) {
83 // hashtable_del(ltc->ctx, &iter);
84 // delete_ust_app_ctx(sock, ltctx);
86 //ret = hashtable_destroy(ltc->ctx);
88 cds_lfht_for_each_entry(ua_chan
->events
, &iter
, ua_event
, node
) {
89 hashtable_del(ua_chan
->events
, &iter
);
90 delete_ust_app_event(sock
, ua_event
);
93 ret
= hashtable_destroy(ua_chan
->events
);
95 ERR("UST app destroy session hashtable failed");
104 * Delete ust app session safely. RCU read lock must be held before calling
107 static void delete_ust_app_session(int sock
,
108 struct ust_app_session
*ua_sess
)
111 struct cds_lfht_iter iter
;
112 struct ust_app_channel
*ua_chan
;
114 if (ua_sess
->metadata
) {
116 * We do NOT release the stream object and metadata object since they
117 * are release when fds are sent to the consumer.
121 cds_lfht_for_each_entry(ua_sess
->channels
, &iter
, ua_chan
, node
) {
122 hashtable_del(ua_sess
->channels
, &iter
);
123 delete_ust_app_channel(sock
, ua_chan
);
126 ret
= hashtable_destroy(ua_sess
->channels
);
128 ERR("UST app destroy session hashtable failed");
137 * Delete a traceable application structure from the global list. Never call
138 * this function outside of a call_rcu call.
140 static void delete_ust_app(struct ust_app
*app
)
143 struct cds_lfht_node
*node
;
144 struct cds_lfht_iter iter
;
145 struct ust_app_session
*ua_sess
;
149 /* Remove from key hash table */
150 node
= hashtable_lookup(ust_app_sock_key_map
,
151 (void *) ((unsigned long) app
->key
.sock
), sizeof(void *), &iter
);
153 /* Not suppose to happen */
154 ERR("UST app key %d not found in key hash table", app
->key
.sock
);
158 ret
= hashtable_del(ust_app_sock_key_map
, &iter
);
160 ERR("UST app unable to delete app sock %d from key hash table",
163 DBG2("UST app pair sock %d key %d deleted",
164 app
->key
.sock
, app
->key
.pid
);
167 /* Socket is already closed at this point */
169 /* Delete ust app sessions info */
170 if (app
->sock_closed
) {
174 cds_lfht_for_each_entry(app
->sessions
, &iter
, ua_sess
, node
) {
175 hashtable_del(app
->sessions
, &iter
);
176 delete_ust_app_session(app
->key
.sock
, ua_sess
);
179 ret
= hashtable_destroy(app
->sessions
);
181 ERR("UST app destroy session hashtable failed");
185 if (!app
->sock_closed
) {
186 close(app
->key
.sock
);
189 DBG2("UST app pid %d deleted", app
->key
.pid
);
196 * URCU intermediate call to delete an UST app.
198 static void delete_ust_app_rcu(struct rcu_head
*head
)
200 struct cds_lfht_node
*node
=
201 caa_container_of(head
, struct cds_lfht_node
, head
);
202 struct ust_app
*app
=
203 caa_container_of(node
, struct ust_app
, node
);
209 * Find an ust_app using the sock and return it. RCU read side lock must be
210 * held before calling this helper function.
212 static struct ust_app
*find_app_by_sock(int sock
)
214 struct cds_lfht_node
*node
;
215 struct ust_app_key
*key
;
216 struct cds_lfht_iter iter
;
218 node
= hashtable_lookup(ust_app_sock_key_map
,
219 (void *)((unsigned long) sock
), sizeof(void *), &iter
);
221 DBG2("UST app find by sock %d key not found", sock
);
225 key
= caa_container_of(node
, struct ust_app_key
, node
);
227 node
= hashtable_lookup(ust_app_ht
,
228 (void *)((unsigned long) key
->pid
), sizeof(void *), &iter
);
230 DBG2("UST app find by sock %d not found", sock
);
233 return caa_container_of(node
, struct ust_app
, node
);
240 * Return pointer to traceable apps list.
242 struct cds_lfht
*ust_app_get_ht(void)
248 * Return ust app pointer or NULL if not found.
250 struct ust_app
*ust_app_find_by_pid(pid_t pid
)
252 struct cds_lfht_node
*node
;
253 struct cds_lfht_iter iter
;
256 node
= hashtable_lookup(ust_app_ht
,
257 (void *)((unsigned long) pid
), sizeof(void *), &iter
);
259 DBG2("UST app no found with pid %d", pid
);
264 DBG2("Found UST app by pid %d", pid
);
266 return caa_container_of(node
, struct ust_app
, node
);
274 * Using pid and uid (of the app), allocate a new ust_app struct and
275 * add it to the global traceable app list.
277 * On success, return 0, else return malloc ENOMEM.
279 int ust_app_register(struct ust_register_msg
*msg
, int sock
)
283 lta
= zmalloc(sizeof(struct ust_app
));
289 lta
->ppid
= msg
->ppid
;
292 lta
->v_major
= msg
->major
;
293 lta
->v_minor
= msg
->minor
;
294 strncpy(lta
->name
, msg
->name
, sizeof(lta
->name
));
295 lta
->name
[16] = '\0';
296 lta
->sessions
= hashtable_new(0);
299 lta
->key
.pid
= msg
->pid
;
300 hashtable_node_init(<a
->node
, (void *)((unsigned long)lta
->key
.pid
),
302 lta
->key
.sock
= sock
;
303 hashtable_node_init(<a
->key
.node
, (void *)((unsigned long)lta
->key
.sock
),
307 hashtable_add_unique(ust_app_sock_key_map
, <a
->key
.node
);
308 hashtable_add_unique(ust_app_ht
, <a
->node
);
311 DBG("App registered with pid:%d ppid:%d uid:%d gid:%d sock:%d name:%s"
312 " (version %d.%d)", lta
->key
.pid
, lta
->ppid
, lta
->uid
, lta
->gid
,
313 lta
->key
.sock
, lta
->name
, lta
->v_major
, lta
->v_minor
);
319 * Unregister app by removing it from the global traceable app list and freeing
322 * The socket is already closed at this point so no close to sock.
324 void ust_app_unregister(int sock
)
327 struct cds_lfht_node
*node
;
328 struct cds_lfht_iter iter
;
331 lta
= find_app_by_sock(sock
);
333 ERR("Unregister app sock %d not found!", sock
);
337 DBG("PID %d unregistering with sock %d", lta
->key
.pid
, sock
);
339 /* Get the node reference for a call_rcu */
340 node
= hashtable_lookup(ust_app_ht
,
341 (void *)((unsigned long) lta
->key
.pid
), sizeof(void *), &iter
);
343 ERR("Unable to find app sock %d by pid %d", sock
, lta
->key
.pid
);
347 /* We got called because the socket was closed on the remote end. */
349 /* Using a flag because we still need "sock" as a key. */
350 lta
->sock_closed
= 1;
351 hashtable_del(ust_app_ht
, &iter
);
352 call_rcu(&node
->head
, delete_ust_app_rcu
);
359 * Return traceable_app_count
361 unsigned long ust_app_list_count(void)
366 count
= hashtable_get_count(ust_app_ht
);
373 * Fill events array with all events name of all registered apps.
375 int ust_app_list_events(struct lttng_event
**events
)
378 size_t nbmem
, count
= 0;
379 struct cds_lfht_iter iter
;
381 struct lttng_event
*tmp
;
383 nbmem
= UST_APP_EVENT_LIST_SIZE
;
384 tmp
= zmalloc(nbmem
* sizeof(struct lttng_event
));
386 PERROR("zmalloc ust app events");
393 cds_lfht_for_each_entry(ust_app_ht
, &iter
, app
, node
) {
394 handle
= ustctl_tracepoint_list(app
->key
.sock
);
396 ERR("UST app list events getting handle failed for app pid %d",
401 while ((ret
= ustctl_tracepoint_list_get(app
->key
.sock
, handle
,
402 tmp
[count
].name
)) != -ENOENT
) {
404 DBG2("Reallocating event list from %zu to %zu bytes", nbmem
,
405 nbmem
+ UST_APP_EVENT_LIST_SIZE
);
406 nbmem
+= UST_APP_EVENT_LIST_SIZE
;
407 tmp
= realloc(tmp
, nbmem
);
409 PERROR("realloc ust app events");
415 tmp
[count
].type
= LTTNG_UST_TRACEPOINT
;
416 tmp
[count
].pid
= app
->key
.pid
;
417 tmp
[count
].enabled
= -1;
425 DBG2("UST app list events done (%zu events)", count
);
434 * Free and clean all traceable apps of the global list.
436 void ust_app_clean_list(void)
439 struct cds_lfht_node
*node
;
440 struct cds_lfht_iter iter
;
443 DBG2("UST app cleaning registered apps hash table");
447 cds_lfht_for_each(ust_app_ht
, &iter
, node
) {
448 app
= caa_container_of(node
, struct ust_app
, node
);
449 close(app
->key
.sock
);
450 app
->sock_closed
= 1;
452 ret
= hashtable_del(ust_app_ht
, &iter
);
454 call_rcu(&node
->head
, delete_ust_app_rcu
);
458 hashtable_destroy(ust_app_ht
);
459 hashtable_destroy(ust_app_sock_key_map
);
465 * Init UST app hash table.
467 void ust_app_ht_alloc(void)
469 ust_app_ht
= hashtable_new(0);
470 ust_app_sock_key_map
= hashtable_new(0);
474 * Alloc new UST app session.
476 static struct ust_app_session
*alloc_ust_app_session(void)
478 struct ust_app_session
*ua_sess
;
480 /* Init most of the default value by allocating and zeroing */
481 ua_sess
= zmalloc(sizeof(struct ust_app_session
));
482 if (ua_sess
== NULL
) {
487 ua_sess
->handle
= -1;
488 ua_sess
->channels
= hashtable_new_str(0);
497 * Alloc new UST app channel.
499 static struct ust_app_channel
*alloc_ust_app_channel(char *name
,
500 struct lttng_ust_channel
*attr
)
502 struct ust_app_channel
*ua_chan
;
504 /* Init most of the default value by allocating and zeroing */
505 ua_chan
= zmalloc(sizeof(struct ust_app_channel
));
506 if (ua_chan
== NULL
) {
511 /* Setup channel name */
512 strncpy(ua_chan
->name
, name
, sizeof(ua_chan
->name
));
513 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
515 ua_chan
->handle
= -1;
516 ua_chan
->ctx
= hashtable_new(0);
517 ua_chan
->events
= hashtable_new_str(0);
518 hashtable_node_init(&ua_chan
->node
, (void *) ua_chan
->name
,
519 strlen(ua_chan
->name
));
521 CDS_INIT_LIST_HEAD(&ua_chan
->streams
.head
);
523 /* Copy attributes */
525 memcpy(&ua_chan
->attr
, attr
, sizeof(ua_chan
->attr
));
528 DBG3("UST app channel %s allocated", ua_chan
->name
);
537 * Alloc new UST app event.
539 static struct ust_app_event
*alloc_ust_app_event(char *name
,
540 struct lttng_ust_event
*attr
)
542 struct ust_app_event
*ua_event
;
544 /* Init most of the default value by allocating and zeroing */
545 ua_event
= zmalloc(sizeof(struct ust_app_event
));
546 if (ua_event
== NULL
) {
551 strncpy(ua_event
->name
, name
, sizeof(ua_event
->name
));
552 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
553 ua_event
->ctx
= hashtable_new(0);
554 hashtable_node_init(&ua_event
->node
, (void *) ua_event
->name
,
555 strlen(ua_event
->name
));
557 /* Copy attributes */
559 memcpy(&ua_event
->attr
, attr
, sizeof(ua_event
->attr
));
562 DBG3("UST app event %s allocated", ua_event
->name
);
570 static void shadow_copy_event(struct ust_app_event
*ua_event
,
571 struct ltt_ust_event
*uevent
)
573 strncpy(ua_event
->name
, uevent
->attr
.name
, sizeof(ua_event
->name
));
574 ua_event
->name
[sizeof(ua_event
->name
) - 1] = '\0';
576 /* TODO: support copy context */
579 static void shadow_copy_channel(struct ust_app_channel
*ua_chan
,
580 struct ltt_ust_channel
*uchan
)
582 struct cds_lfht_iter iter
;
583 struct cds_lfht_node
*node
, *ua_event_node
;
584 struct ltt_ust_event
*uevent
;
585 struct ust_app_event
*ua_event
;
587 DBG2("Shadow copy of UST app channel %s", ua_chan
->name
);
589 strncpy(ua_chan
->name
, uchan
->name
, sizeof(ua_chan
->name
));
590 ua_chan
->name
[sizeof(ua_chan
->name
) - 1] = '\0';
592 /* TODO: support copy context */
594 /* Copy all events from ltt ust channel to ust app channel */
595 hashtable_get_first(uchan
->events
, &iter
);
596 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
597 uevent
= caa_container_of(node
, struct ltt_ust_event
, node
);
599 ua_event_node
= hashtable_lookup(ua_chan
->events
,
600 (void *) uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
601 if (ua_event_node
== NULL
) {
602 DBG2("UST event %s not found on shadow copy channel",
604 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
605 if (ua_event
== NULL
) {
608 shadow_copy_event(ua_event
, uevent
);
609 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
613 /* Get next UST events */
614 hashtable_get_next(uchan
->events
, &iter
);
617 DBG3("Shadow copy channel done");
620 static void shadow_copy_session(struct ust_app_session
*ua_sess
,
621 struct ltt_ust_session
*usess
)
623 struct cds_lfht_node
*node
, *ua_chan_node
;
624 struct cds_lfht_iter iter
;
625 struct ltt_ust_channel
*uchan
;
626 struct ust_app_channel
*ua_chan
;
628 DBG2("Shadow copy of session handle %d", ua_sess
->handle
);
630 ua_sess
->uid
= usess
->uid
;
632 /* TODO: support all UST domain */
634 /* Iterate over all channels in global domain. */
635 hashtable_get_first(usess
->domain_global
.channels
, &iter
);
636 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
637 uchan
= caa_container_of(node
, struct ltt_ust_channel
, node
);
639 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
640 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
641 if (ua_chan_node
== NULL
) {
642 DBG2("Channel %s not found on shadow session copy, creating it",
644 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
645 if (ua_chan
== NULL
) {
646 /* malloc failed... continuing */
650 shadow_copy_channel(ua_chan
, uchan
);
651 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
655 /* Next item in hash table */
656 hashtable_get_next(usess
->domain_global
.channels
, &iter
);
661 * Return ust app session from the app session hashtable using the UST session
664 static struct ust_app_session
*lookup_session_by_app(
665 struct ltt_ust_session
*usess
, struct ust_app
*app
)
667 struct cds_lfht_iter iter
;
668 struct cds_lfht_node
*node
;
670 /* Get right UST app session from app */
671 node
= hashtable_lookup(app
->sessions
,
672 (void *) ((unsigned long) usess
->uid
), sizeof(void *), &iter
);
677 return caa_container_of(node
, struct ust_app_session
, node
);
684 * Create a UST session onto the tracer of app and add it the session
687 * Return ust app session or NULL on error.
689 static struct ust_app_session
*create_ust_app_session(
690 struct ltt_ust_session
*usess
, struct ust_app
*app
)
693 struct ust_app_session
*ua_sess
;
695 ua_sess
= lookup_session_by_app(usess
, app
);
696 if (ua_sess
== NULL
) {
697 DBG2("UST app pid: %d session uid %d not found, creating it",
698 app
->key
.pid
, usess
->uid
);
699 ua_sess
= alloc_ust_app_session();
700 if (ua_sess
== NULL
) {
701 /* Only malloc can failed so something is really wrong */
704 shadow_copy_session(ua_sess
, usess
);
707 if (ua_sess
->handle
== -1) {
708 ret
= ustctl_create_session(app
->key
.sock
);
710 ERR("Error creating session for app pid %d, sock %d",
711 app
->key
.pid
, app
->key
.sock
);
712 /* TODO: free() ua_sess */
716 DBG2("UST app ustctl create session handle %d", ret
);
717 ua_sess
->handle
= ret
;
719 /* Add ust app session to app's HT */
720 hashtable_node_init(&ua_sess
->node
,
721 (void *)((unsigned long) ua_sess
->uid
), sizeof(void *));
722 hashtable_add_unique(app
->sessions
, &ua_sess
->node
);
724 DBG2("UST app session created successfully with handle %d", ret
);
734 * Create the specified channel onto the UST tracer for a UST session.
736 static int create_ust_channel(struct ust_app
*app
,
737 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
)
741 /* TODO: remove cast and use lttng-ust-abi.h */
742 ret
= ustctl_create_channel(app
->key
.sock
, ua_sess
->handle
,
743 (struct lttng_ust_channel_attr
*)&ua_chan
->attr
, &ua_chan
->obj
);
745 DBG("Error creating channel %s for app (pid: %d, sock: %d) "
746 "and session handle %d with ret %d",
747 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
,
748 ua_sess
->handle
, ret
);
752 ua_chan
->handle
= ua_chan
->obj
->handle
;
753 ua_chan
->attr
.shm_fd
= ua_chan
->obj
->shm_fd
;
754 ua_chan
->attr
.wait_fd
= ua_chan
->obj
->wait_fd
;
755 ua_chan
->attr
.memory_map_size
= ua_chan
->obj
->memory_map_size
;
757 DBG2("UST app channel %s created successfully for pid:%d and sock:%d",
758 ua_chan
->name
, app
->key
.pid
, app
->key
.sock
);
765 * Create the specified event onto the UST tracer for a UST session.
767 static int create_ust_event(struct ust_app
*app
,
768 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
,
769 struct ust_app_event
*ua_event
)
773 /* Create UST event on tracer */
774 ret
= ustctl_create_event(app
->key
.sock
, &ua_event
->attr
, ua_chan
->obj
,
777 ERR("Error ustctl create event %s for app pid: %d with ret %d",
778 ua_event
->attr
.name
, app
->key
.pid
, ret
);
782 ua_event
->handle
= ua_event
->obj
->handle
;
783 ua_event
->enabled
= 1;
785 DBG2("UST app event %s created successfully for pid:%d",
786 ua_event
->attr
.name
, app
->key
.pid
);
792 static struct ust_app_channel
*create_ust_app_channel(
793 struct ust_app_session
*ua_sess
, struct ltt_ust_channel
*uchan
,
797 struct cds_lfht_iter iter
;
798 struct cds_lfht_node
*ua_chan_node
;
799 struct ust_app_channel
*ua_chan
;
801 /* Lookup channel in the ust app session */
802 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
803 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
804 if (ua_chan_node
== NULL
) {
805 DBG2("Unable to find channel %s in ust session uid %u",
806 uchan
->name
, ua_sess
->uid
);
807 ua_chan
= alloc_ust_app_channel(uchan
->name
, &uchan
->attr
);
808 if (ua_chan
== NULL
) {
811 shadow_copy_channel(ua_chan
, uchan
);
813 hashtable_add_unique(ua_sess
->channels
, &ua_chan
->node
);
815 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
818 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
829 static struct ust_app_event
*create_ust_app_event(
830 struct ust_app_session
*ua_sess
, struct ust_app_channel
*ua_chan
,
831 struct ltt_ust_event
*uevent
, struct ust_app
*app
)
834 struct cds_lfht_iter iter
;
835 struct cds_lfht_node
*ua_event_node
;
836 struct ust_app_event
*ua_event
;
839 ua_event_node
= hashtable_lookup(ua_chan
->events
,
840 (void *)uevent
->attr
.name
, strlen(uevent
->attr
.name
), &iter
);
841 if (ua_event_node
== NULL
) {
842 DBG2("UST app event %s not found, creating it", uevent
->attr
.name
);
843 /* Does not exist so create one */
844 ua_event
= alloc_ust_app_event(uevent
->attr
.name
, &uevent
->attr
);
845 if (ua_event
== NULL
) {
846 /* Only malloc can failed so something is really wrong */
849 shadow_copy_event(ua_event
, uevent
);
851 hashtable_add_unique(ua_chan
->events
, &ua_event
->node
);
853 ua_event
= caa_container_of(ua_event_node
, struct ust_app_event
, node
);
856 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
867 static int create_ust_app_metadata(struct ust_app_session
*ua_sess
,
868 char *pathname
, struct ust_app
*app
)
871 struct lttng_ust_channel_attr uattr
;
873 if (ua_sess
->metadata
== NULL
) {
874 /* Allocate UST metadata */
875 ua_sess
->metadata
= trace_ust_create_metadata(pathname
);
876 if (ua_sess
->metadata
== NULL
) {
877 ERR("UST app session %d creating metadata failed",
882 uattr
.overwrite
= ua_sess
->metadata
->attr
.overwrite
;
883 uattr
.subbuf_size
= ua_sess
->metadata
->attr
.subbuf_size
;
884 uattr
.num_subbuf
= ua_sess
->metadata
->attr
.num_subbuf
;
885 uattr
.switch_timer_interval
=
886 ua_sess
->metadata
->attr
.switch_timer_interval
;
887 uattr
.read_timer_interval
=
888 ua_sess
->metadata
->attr
.read_timer_interval
;
889 uattr
.output
= ua_sess
->metadata
->attr
.output
;
891 /* UST tracer metadata creation */
892 ret
= ustctl_open_metadata(app
->key
.sock
, ua_sess
->handle
, &uattr
,
893 &ua_sess
->metadata
->obj
);
895 ERR("UST app open metadata failed for app pid:%d",
900 DBG2("UST metadata opened for app pid %d", app
->key
.pid
);
903 /* Open UST metadata stream */
904 if (ua_sess
->metadata
->stream_obj
== NULL
) {
905 ret
= ustctl_create_stream(app
->key
.sock
, ua_sess
->metadata
->obj
,
906 &ua_sess
->metadata
->stream_obj
);
908 ERR("UST create metadata stream failed");
912 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
, "%s/%s-%d",
913 pathname
, app
->name
, app
->key
.pid
);
915 PERROR("asprintf UST create stream");
919 ret
= mkdir(ua_sess
->metadata
->pathname
, S_IRWXU
| S_IRWXG
);
921 PERROR("mkdir UST metadata");
925 ret
= snprintf(ua_sess
->metadata
->pathname
, PATH_MAX
, "%s/%s-%d/metadata",
926 pathname
, app
->name
, app
->key
.pid
);
928 PERROR("asprintf UST create stream");
932 DBG2("UST metadata stream object created for app pid %d",
943 * Add channel to all ust app session.
945 int ust_app_add_channel_all(struct ltt_ust_session
*usess
,
946 struct ltt_ust_channel
*uchan
)
949 struct cds_lfht_iter iter
;
950 struct cds_lfht_node
*node
;
952 struct ust_app_session
*ua_sess
;
953 struct ust_app_channel
*ua_chan
;
955 if (usess
== NULL
|| uchan
== NULL
) {
956 ERR("Adding UST global channel to NULL values");
961 DBG2("UST app adding channel %s to global domain for session uid %d",
962 uchan
->name
, usess
->uid
);
966 /* For every UST applications registered */
967 hashtable_get_first(ust_app_ht
, &iter
);
968 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
969 app
= caa_container_of(node
, struct ust_app
, node
);
971 /* Create session on the tracer side and add it to app session HT */
972 ua_sess
= create_ust_app_session(usess
, app
);
973 if (ua_sess
== NULL
) {
977 /* Create channel onto application */
978 ua_chan
= create_ust_app_channel(ua_sess
, uchan
, app
);
979 if (ua_chan
== NULL
) {
984 /* Next applications */
985 hashtable_get_next(ust_app_ht
, &iter
);
993 int ust_app_add_event_all(struct ltt_ust_session
*usess
,
994 struct ltt_ust_channel
*uchan
, struct ltt_ust_event
*uevent
)
997 struct cds_lfht_iter iter
;
998 struct cds_lfht_node
*node
, *ua_chan_node
;
1000 struct ust_app_session
*ua_sess
;
1001 struct ust_app_channel
*ua_chan
;
1002 struct ust_app_event
*ua_event
;
1004 DBG("UST app creating event %s for all apps for session uid %d",
1005 uevent
->attr
.name
, usess
->uid
);
1009 /* For all registered applications */
1010 hashtable_get_first(ust_app_ht
, &iter
);
1011 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
1012 app
= caa_container_of(node
, struct ust_app
, node
);
1014 /* Create session on the tracer side and add it to app session HT */
1015 ua_sess
= create_ust_app_session(usess
, app
);
1016 if (ua_sess
== NULL
) {
1020 /* Lookup channel in the ust app session */
1021 ua_chan_node
= hashtable_lookup(ua_sess
->channels
,
1022 (void *)uchan
->name
, strlen(uchan
->name
), &iter
);
1023 if (ua_chan_node
== NULL
) {
1024 ERR("Channel %s not found in session uid %d. Skipping",
1025 uchan
->name
, usess
->uid
);
1028 ua_chan
= caa_container_of(ua_chan_node
, struct ust_app_channel
, node
);
1030 ua_event
= create_ust_app_event(ua_sess
, ua_chan
, uevent
, app
);
1031 if (ua_event
== NULL
) {
1036 /* Next applications */
1037 hashtable_get_next(ust_app_ht
, &iter
);
1044 int ust_app_start_trace(struct ltt_ust_session
*usess
, struct ust_app
*app
)
1047 struct cds_lfht_iter iter
;
1048 struct cds_lfht_node
*node
;
1049 struct ust_app_session
*ua_sess
;
1050 struct ust_app_channel
*ua_chan
;
1052 DBG("Starting tracing for ust app pid %d", app
->key
.pid
);
1056 ua_sess
= lookup_session_by_app(usess
, app
);
1057 if (ua_sess
== NULL
) {
1058 /* Only malloc can failed so something is really wrong */
1059 goto error_rcu_unlock
;
1062 ret
= create_ust_app_metadata(ua_sess
, usess
->pathname
, app
);
1064 goto error_rcu_unlock
;
1067 /* For each channel */
1068 hashtable_get_first(ua_sess
->channels
, &iter
);
1069 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
1070 ua_chan
= caa_container_of(node
, struct ust_app_channel
, node
);
1072 /* Create all streams */
1074 struct ltt_ust_stream
*ustream
;
1076 ustream
= zmalloc(sizeof(*ustream
));
1077 if (ustream
== NULL
) {
1078 PERROR("zmalloc ust stream");
1079 goto error_rcu_unlock
;
1082 ret
= ustctl_create_stream(app
->key
.sock
, ua_chan
->obj
,
1085 /* Got all streams */
1088 ustream
->handle
= ustream
->obj
->handle
;
1090 /* Order is important */
1091 cds_list_add_tail(&ustream
->list
, &ua_chan
->streams
.head
);
1092 ret
= snprintf(ustream
->pathname
, PATH_MAX
, "%s/%s-%d/%s_%u",
1093 usess
->pathname
, app
->name
, app
->key
.pid
,
1094 ua_chan
->name
, ua_chan
->streams
.count
++);
1096 PERROR("asprintf UST create stream");
1099 DBG2("UST stream %d ready at %s", ua_chan
->streams
.count
,
1103 /* Next applications */
1104 hashtable_get_next(ua_sess
->channels
, &iter
);
1107 /* Setup UST consumer socket and send fds to it */
1108 ret
= ust_consumer_send_session(usess
->consumer_fd
, ua_sess
);
1110 goto error_rcu_unlock
;
1113 /* This start the UST tracing */
1114 ret
= ustctl_start_session(app
->key
.sock
, ua_sess
->handle
);
1116 ERR("Error starting tracing for app pid: %d", app
->key
.pid
);
1117 goto error_rcu_unlock
;
1121 /* Quiescent wait after starting trace */
1122 ustctl_wait_quiescent(app
->key
.sock
);
1131 int ust_app_start_trace_all(struct ltt_ust_session
*usess
)
1134 struct cds_lfht_iter iter
;
1135 struct cds_lfht_node
*node
;
1136 struct ust_app
*app
;
1138 DBG("Starting all UST traces");
1141 hashtable_get_first(ust_app_ht
, &iter
);
1142 while ((node
= hashtable_iter_get_node(&iter
)) != NULL
) {
1143 app
= caa_container_of(node
, struct ust_app
, node
);
1145 ret
= ust_app_start_trace(usess
, app
);
1151 /* Next applications */
1152 hashtable_get_next(ust_app_ht
, &iter
);
1159 void ust_app_global_update(struct ltt_ust_session
*usess
, int sock
)
1162 struct cds_lfht_iter iter
;
1163 struct ust_app
*app
;
1164 struct ust_app_session
*ua_sess
;
1165 struct ust_app_channel
*ua_chan
;
1166 struct ust_app_event
*ua_event
;
1168 if (usess
== NULL
) {
1169 DBG2("No UST session on global update. Returning");
1173 DBG2("UST app global update for app sock %d for session uid %d", sock
,
1178 app
= find_app_by_sock(sock
);
1180 ERR("Failed to update app sock %d", sock
);
1184 ua_sess
= create_ust_app_session(usess
, app
);
1185 if (ua_sess
== NULL
) {
1190 * We can iterate safely here over all UST app session sicne the create ust
1191 * app session above made a shadow copy of the UST global domain from the
1194 cds_lfht_for_each_entry(ua_sess
->channels
, &iter
, ua_chan
, node
) {
1195 ret
= create_ust_channel(app
, ua_sess
, ua_chan
);
1197 /* FIXME: Should we quit here or continue... */
1201 /* For each events */
1202 cds_lfht_for_each_entry(ua_chan
->events
, &iter
, ua_event
, node
) {
1203 ret
= create_ust_event(app
, ua_sess
, ua_chan
, ua_event
);
1205 /* FIXME: Should we quit here or continue... */
1211 if (usess
->start_trace
) {
1212 ret
= ust_app_start_trace(usess
, app
);
1217 DBG2("UST trace started for app pid %d", app
->key
.pid
);