2 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
3 * Copyright (C) 2016 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License, version 2 only,
7 * as published by the Free Software Foundation.
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 along
15 * with this program; if not, write to the Free Software Foundation, Inc.,
16 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
26 #include <common/common.h>
27 #include <common/defaults.h>
29 #include "buffer-registry.h"
30 #include "trace-ust.h"
37 * Match function for the events hash table lookup.
39 * Matches by name only. Used by the disable command.
41 int trace_ust_ht_match_event_by_name(struct cds_lfht_node
*node
,
44 struct ltt_ust_event
*event
;
50 event
= caa_container_of(node
, struct ltt_ust_event
, node
.node
);
54 if (strncmp(event
->attr
.name
, name
, sizeof(event
->attr
.name
)) != 0) {
66 * Match function for the hash table lookup.
68 * It matches an ust event based on three attributes which are the event name,
69 * the filter bytecode and the loglevel.
71 int trace_ust_ht_match_event(struct cds_lfht_node
*node
, const void *_key
)
73 struct ltt_ust_event
*event
;
74 const struct ltt_ust_ht_key
*key
;
75 int ev_loglevel_value
;
81 event
= caa_container_of(node
, struct ltt_ust_event
, node
.node
);
83 ev_loglevel_value
= event
->attr
.loglevel
;
85 /* Match the 4 elements of the key: name, filter, loglevel, exclusions. */
88 if (strncmp(event
->attr
.name
, key
->name
, sizeof(event
->attr
.name
)) != 0) {
92 /* Event loglevel value and type. */
93 ll_match
= loglevels_match(event
->attr
.loglevel_type
,
94 ev_loglevel_value
, key
->loglevel_type
,
95 key
->loglevel_value
, LTTNG_UST_LOGLEVEL_ALL
);
101 /* Only one of the filters is NULL, fail. */
102 if ((key
->filter
&& !event
->filter
) || (!key
->filter
&& event
->filter
)) {
106 if (key
->filter
&& event
->filter
) {
107 /* Both filters exists, check length followed by the bytecode. */
108 if (event
->filter
->len
!= key
->filter
->len
||
109 memcmp(event
->filter
->data
, key
->filter
->data
,
110 event
->filter
->len
) != 0) {
115 /* If only one of the exclusions is NULL, fail. */
116 if ((key
->exclusion
&& !event
->exclusion
) || (!key
->exclusion
&& event
->exclusion
)) {
120 if (key
->exclusion
&& event
->exclusion
) {
123 /* Check exclusion counts first. */
124 if (event
->exclusion
->count
!= key
->exclusion
->count
) {
128 /* Compare names individually. */
129 for (i
= 0; i
< event
->exclusion
->count
; ++i
) {
132 const char *name_ev
=
133 LTTNG_EVENT_EXCLUSION_NAME_AT(
134 event
->exclusion
, i
);
137 * Compare this exclusion name to all the key's
140 for (j
= 0; j
< key
->exclusion
->count
; ++j
) {
141 const char *name_key
=
142 LTTNG_EVENT_EXCLUSION_NAME_AT(
145 if (!strncmp(name_ev
, name_key
,
146 LTTNG_SYMBOL_NAME_LEN
)) {
154 * If the current exclusion name was not found amongst
155 * the key's exclusion names, then there's no match.
170 * Find the channel in the hashtable and return channel pointer. RCU read side
171 * lock MUST be acquired before calling this.
173 struct ltt_ust_channel
*trace_ust_find_channel_by_name(struct lttng_ht
*ht
,
176 struct lttng_ht_node_str
*node
;
177 struct lttng_ht_iter iter
;
180 * If we receive an empty string for channel name, it means the
181 * default channel name is requested.
184 name
= DEFAULT_CHANNEL_NAME
;
186 lttng_ht_lookup(ht
, (void *)name
, &iter
);
187 node
= lttng_ht_iter_get_node_str(&iter
);
192 DBG2("Trace UST channel %s found by name", name
);
194 return caa_container_of(node
, struct ltt_ust_channel
, node
);
197 DBG2("Trace UST channel %s not found by name", name
);
202 * Find the event in the hashtable and return event pointer. RCU read side lock
203 * MUST be acquired before calling this.
205 struct ltt_ust_event
*trace_ust_find_event(struct lttng_ht
*ht
,
206 char *name
, struct lttng_filter_bytecode
*filter
,
207 enum lttng_ust_loglevel_type loglevel_type
, int loglevel_value
,
208 struct lttng_event_exclusion
*exclusion
)
210 struct lttng_ht_node_str
*node
;
211 struct lttng_ht_iter iter
;
212 struct ltt_ust_ht_key key
;
219 key
.loglevel_type
= loglevel_type
;
220 key
.loglevel_value
= loglevel_value
;
221 key
.exclusion
= exclusion
;
223 cds_lfht_lookup(ht
->ht
, ht
->hash_fct((void *) name
, lttng_ht_seed
),
224 trace_ust_ht_match_event
, &key
, &iter
.iter
);
225 node
= lttng_ht_iter_get_node_str(&iter
);
230 DBG2("Trace UST event %s found", key
.name
);
232 return caa_container_of(node
, struct ltt_ust_event
, node
);
235 DBG2("Trace UST event %s NOT found", key
.name
);
240 * Lookup an agent in the session agents hash table by domain type and return
241 * the object if found else NULL.
243 * RCU read side lock must be acquired before calling and only released
244 * once the agent is no longer in scope or being used.
246 struct agent
*trace_ust_find_agent(struct ltt_ust_session
*session
,
247 enum lttng_domain_type domain_type
)
249 struct agent
*agt
= NULL
;
250 struct lttng_ht_node_u64
*node
;
251 struct lttng_ht_iter iter
;
256 DBG3("Trace ust agent lookup for domain %d", domain_type
);
260 lttng_ht_lookup(session
->agents
, &key
, &iter
);
261 node
= lttng_ht_iter_get_node_u64(&iter
);
265 agt
= caa_container_of(node
, struct agent
, node
);
272 * Allocate and initialize a ust session data structure.
274 * Return pointer to structure or NULL.
276 struct ltt_ust_session
*trace_ust_create_session(uint64_t session_id
)
278 struct ltt_ust_session
*lus
;
280 /* Allocate a new ltt ust session */
281 lus
= zmalloc(sizeof(struct ltt_ust_session
));
283 PERROR("create ust session zmalloc");
287 /* Init data structure */
288 lus
->id
= session_id
;
291 /* Set default metadata channel attribute. */
292 lus
->metadata_attr
.overwrite
= DEFAULT_CHANNEL_OVERWRITE
;
293 lus
->metadata_attr
.subbuf_size
= default_get_metadata_subbuf_size();
294 lus
->metadata_attr
.num_subbuf
= DEFAULT_METADATA_SUBBUF_NUM
;
295 lus
->metadata_attr
.switch_timer_interval
= DEFAULT_METADATA_SWITCH_TIMER
;
296 lus
->metadata_attr
.read_timer_interval
= DEFAULT_METADATA_READ_TIMER
;
297 lus
->metadata_attr
.output
= LTTNG_UST_MMAP
;
300 * Default buffer type. This can be changed through an enable channel
301 * requesting a different type. Note that this can only be changed once
302 * during the session lifetime which is at the first enable channel and
303 * only before start. The flag buffer_type_changed indicates the status.
305 lus
->buffer_type
= LTTNG_BUFFER_PER_UID
;
306 /* Once set to 1, the buffer_type is immutable for the session. */
307 lus
->buffer_type_changed
= 0;
308 /* Init it in case it get used after allocation. */
309 CDS_INIT_LIST_HEAD(&lus
->buffer_reg_uid_list
);
311 /* Alloc UST global domain channels' HT */
312 lus
->domain_global
.channels
= lttng_ht_new(0, LTTNG_HT_TYPE_STRING
);
313 /* Alloc agent hash table. */
314 lus
->agents
= lttng_ht_new(0, LTTNG_HT_TYPE_U64
);
316 lus
->tracker_list_vpid
= lttng_tracker_list_create();
317 if (!lus
->tracker_list_vpid
) {
320 lus
->tracker_list_vuid
= lttng_tracker_list_create();
321 if (!lus
->tracker_list_vuid
) {
324 lus
->tracker_list_vgid
= lttng_tracker_list_create();
325 if (!lus
->tracker_list_vgid
) {
328 lus
->consumer
= consumer_create_output(CONSUMER_DST_LOCAL
);
329 if (lus
->consumer
== NULL
) {
333 DBG2("UST trace session create successful");
338 lttng_tracker_list_destroy(lus
->tracker_list_vpid
);
339 lttng_tracker_list_destroy(lus
->tracker_list_vuid
);
340 lttng_tracker_list_destroy(lus
->tracker_list_vgid
);
341 ht_cleanup_push(lus
->domain_global
.channels
);
342 ht_cleanup_push(lus
->agents
);
349 * Allocate and initialize a ust channel data structure.
351 * Return pointer to structure or NULL.
353 struct ltt_ust_channel
*trace_ust_create_channel(struct lttng_channel
*chan
,
354 enum lttng_domain_type domain
)
356 struct ltt_ust_channel
*luc
;
360 luc
= zmalloc(sizeof(struct ltt_ust_channel
));
362 PERROR("ltt_ust_channel zmalloc");
366 luc
->domain
= domain
;
368 /* Copy UST channel attributes */
369 luc
->attr
.overwrite
= chan
->attr
.overwrite
;
370 luc
->attr
.subbuf_size
= chan
->attr
.subbuf_size
;
371 luc
->attr
.num_subbuf
= chan
->attr
.num_subbuf
;
372 luc
->attr
.switch_timer_interval
= chan
->attr
.switch_timer_interval
;
373 luc
->attr
.read_timer_interval
= chan
->attr
.read_timer_interval
;
374 luc
->attr
.output
= (enum lttng_ust_output
) chan
->attr
.output
;
376 /* Translate to UST output enum */
377 switch (luc
->attr
.output
) {
379 luc
->attr
.output
= LTTNG_UST_MMAP
;
384 * If we receive an empty string for channel name, it means the
385 * default channel name is requested.
387 if (chan
->name
[0] == '\0') {
388 strncpy(luc
->name
, DEFAULT_CHANNEL_NAME
, sizeof(luc
->name
));
390 /* Copy channel name */
391 strncpy(luc
->name
, chan
->name
, sizeof(luc
->name
));
393 luc
->name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
396 lttng_ht_node_init_str(&luc
->node
, luc
->name
);
397 CDS_INIT_LIST_HEAD(&luc
->ctx_list
);
399 /* Alloc hash tables */
400 luc
->events
= lttng_ht_new(0, LTTNG_HT_TYPE_STRING
);
401 luc
->ctx
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
403 /* On-disk circular buffer parameters */
404 luc
->tracefile_size
= chan
->attr
.tracefile_size
;
405 luc
->tracefile_count
= chan
->attr
.tracefile_count
;
407 DBG2("Trace UST channel %s created", luc
->name
);
414 * Validates an exclusion list.
416 * Returns 0 if valid, negative value if invalid.
418 static int validate_exclusion(struct lttng_event_exclusion
*exclusion
)
425 for (i
= 0; i
< exclusion
->count
; ++i
) {
428 LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion
, i
);
430 for (j
= 0; j
< i
; ++j
) {
432 LTTNG_EVENT_EXCLUSION_NAME_AT(exclusion
, j
);
434 if (!strncmp(name_a
, name_b
, LTTNG_SYMBOL_NAME_LEN
)) {
447 * Allocate and initialize a ust event. Set name and event type.
448 * We own filter_expression, filter, and exclusion.
450 * Return pointer to structure or NULL.
452 struct ltt_ust_event
*trace_ust_create_event(struct lttng_event
*ev
,
453 char *filter_expression
,
454 struct lttng_filter_bytecode
*filter
,
455 struct lttng_event_exclusion
*exclusion
,
458 struct ltt_ust_event
*lue
;
462 if (exclusion
&& validate_exclusion(exclusion
)) {
466 lue
= zmalloc(sizeof(struct ltt_ust_event
));
468 PERROR("ust event zmalloc");
472 lue
->internal
= internal_event
;
475 case LTTNG_EVENT_PROBE
:
476 lue
->attr
.instrumentation
= LTTNG_UST_PROBE
;
478 case LTTNG_EVENT_FUNCTION
:
479 lue
->attr
.instrumentation
= LTTNG_UST_FUNCTION
;
481 case LTTNG_EVENT_FUNCTION_ENTRY
:
482 lue
->attr
.instrumentation
= LTTNG_UST_FUNCTION
;
484 case LTTNG_EVENT_TRACEPOINT
:
485 lue
->attr
.instrumentation
= LTTNG_UST_TRACEPOINT
;
488 ERR("Unknown ust instrumentation type (%d)", ev
->type
);
489 goto error_free_event
;
492 /* Copy event name */
493 strncpy(lue
->attr
.name
, ev
->name
, LTTNG_UST_SYM_NAME_LEN
);
494 lue
->attr
.name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
496 switch (ev
->loglevel_type
) {
497 case LTTNG_EVENT_LOGLEVEL_ALL
:
498 lue
->attr
.loglevel_type
= LTTNG_UST_LOGLEVEL_ALL
;
499 lue
->attr
.loglevel
= -1; /* Force to -1 */
501 case LTTNG_EVENT_LOGLEVEL_RANGE
:
502 lue
->attr
.loglevel_type
= LTTNG_UST_LOGLEVEL_RANGE
;
503 lue
->attr
.loglevel
= ev
->loglevel
;
505 case LTTNG_EVENT_LOGLEVEL_SINGLE
:
506 lue
->attr
.loglevel_type
= LTTNG_UST_LOGLEVEL_SINGLE
;
507 lue
->attr
.loglevel
= ev
->loglevel
;
510 ERR("Unknown ust loglevel type (%d)", ev
->loglevel_type
);
511 goto error_free_event
;
515 lue
->filter_expression
= filter_expression
;
516 lue
->filter
= filter
;
517 lue
->exclusion
= exclusion
;
520 lttng_ht_node_init_str(&lue
->node
, lue
->attr
.name
);
522 DBG2("Trace UST event %s, loglevel (%d,%d) created",
523 lue
->attr
.name
, lue
->attr
.loglevel_type
,
531 free(filter_expression
);
538 int trace_ust_context_type_event_to_ust(
539 enum lttng_event_context_type type
)
544 case LTTNG_EVENT_CONTEXT_VTID
:
545 utype
= LTTNG_UST_CONTEXT_VTID
;
547 case LTTNG_EVENT_CONTEXT_VPID
:
548 utype
= LTTNG_UST_CONTEXT_VPID
;
550 case LTTNG_EVENT_CONTEXT_PTHREAD_ID
:
551 utype
= LTTNG_UST_CONTEXT_PTHREAD_ID
;
553 case LTTNG_EVENT_CONTEXT_PROCNAME
:
554 utype
= LTTNG_UST_CONTEXT_PROCNAME
;
556 case LTTNG_EVENT_CONTEXT_IP
:
557 utype
= LTTNG_UST_CONTEXT_IP
;
559 case LTTNG_EVENT_CONTEXT_PERF_THREAD_COUNTER
:
560 if (!ustctl_has_perf_counters()) {
562 WARN("Perf counters not implemented in UST");
564 utype
= LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER
;
567 case LTTNG_EVENT_CONTEXT_APP_CONTEXT
:
568 utype
= LTTNG_UST_CONTEXT_APP_CONTEXT
;
578 * Return 1 if contexts match, 0 otherwise.
580 int trace_ust_match_context(struct ltt_ust_context
*uctx
,
581 struct lttng_event_context
*ctx
)
585 utype
= trace_ust_context_type_event_to_ust(ctx
->ctx
);
589 if (uctx
->ctx
.ctx
!= utype
) {
593 case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER
:
594 if (uctx
->ctx
.u
.perf_counter
.type
595 != ctx
->u
.perf_counter
.type
) {
598 if (uctx
->ctx
.u
.perf_counter
.config
599 != ctx
->u
.perf_counter
.config
) {
602 if (strncmp(uctx
->ctx
.u
.perf_counter
.name
,
603 ctx
->u
.perf_counter
.name
,
604 LTTNG_UST_SYM_NAME_LEN
)) {
608 case LTTNG_UST_CONTEXT_APP_CONTEXT
:
609 assert(uctx
->ctx
.u
.app_ctx
.provider_name
);
610 assert(uctx
->ctx
.u
.app_ctx
.ctx_name
);
611 if (strcmp(uctx
->ctx
.u
.app_ctx
.provider_name
,
612 ctx
->u
.app_ctx
.provider_name
) ||
613 strcmp(uctx
->ctx
.u
.app_ctx
.ctx_name
,
614 ctx
->u
.app_ctx
.ctx_name
)) {
625 * Allocate and initialize an UST context.
627 * Return pointer to structure or NULL.
629 struct ltt_ust_context
*trace_ust_create_context(
630 struct lttng_event_context
*ctx
)
632 struct ltt_ust_context
*uctx
= NULL
;
637 utype
= trace_ust_context_type_event_to_ust(ctx
->ctx
);
639 ERR("Invalid UST context");
643 uctx
= zmalloc(sizeof(struct ltt_ust_context
));
645 PERROR("zmalloc ltt_ust_context");
649 uctx
->ctx
.ctx
= (enum lttng_ust_context_type
) utype
;
651 case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER
:
652 uctx
->ctx
.u
.perf_counter
.type
= ctx
->u
.perf_counter
.type
;
653 uctx
->ctx
.u
.perf_counter
.config
= ctx
->u
.perf_counter
.config
;
654 strncpy(uctx
->ctx
.u
.perf_counter
.name
, ctx
->u
.perf_counter
.name
,
655 LTTNG_UST_SYM_NAME_LEN
);
656 uctx
->ctx
.u
.perf_counter
.name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
658 case LTTNG_UST_CONTEXT_APP_CONTEXT
:
660 char *provider_name
= NULL
, *ctx_name
= NULL
;
662 provider_name
= strdup(ctx
->u
.app_ctx
.provider_name
);
663 if (!provider_name
) {
666 uctx
->ctx
.u
.app_ctx
.provider_name
= provider_name
;
668 ctx_name
= strdup(ctx
->u
.app_ctx
.ctx_name
);
672 uctx
->ctx
.u
.app_ctx
.ctx_name
= ctx_name
;
678 lttng_ht_node_init_ulong(&uctx
->node
, (unsigned long) uctx
->ctx
.ctx
);
682 trace_ust_destroy_context(uctx
);
687 void destroy_id_tracker_node_rcu(struct rcu_head
*head
)
689 struct ust_id_tracker_node
*tracker_node
=
690 caa_container_of(head
, struct ust_id_tracker_node
, node
.head
);
695 void destroy_id_tracker_node(struct ust_id_tracker_node
*tracker_node
)
698 call_rcu(&tracker_node
->node
.head
, destroy_id_tracker_node_rcu
);
702 int init_id_tracker(struct ust_id_tracker
*id_tracker
)
706 id_tracker
->ht
= lttng_ht_new(0, LTTNG_HT_TYPE_ULONG
);
707 if (!id_tracker
->ht
) {
708 ret
= LTTNG_ERR_NOMEM
;
717 * Teardown id tracker content, but don't free id_tracker object.
720 void fini_id_tracker(struct ust_id_tracker
*id_tracker
)
722 struct ust_id_tracker_node
*tracker_node
;
723 struct lttng_ht_iter iter
;
725 if (!id_tracker
->ht
) {
729 cds_lfht_for_each_entry(id_tracker
->ht
->ht
,
730 &iter
.iter
, tracker_node
, node
.node
) {
731 int ret
= lttng_ht_del(id_tracker
->ht
, &iter
);
734 destroy_id_tracker_node(tracker_node
);
737 ht_cleanup_push(id_tracker
->ht
);
738 id_tracker
->ht
= NULL
;
742 struct ust_id_tracker_node
*id_tracker_lookup(
743 struct ust_id_tracker
*id_tracker
, int id
,
744 struct lttng_ht_iter
*iter
)
746 unsigned long _id
= (unsigned long) id
;
747 struct lttng_ht_node_ulong
*node
;
749 lttng_ht_lookup(id_tracker
->ht
, (void *) _id
, iter
);
750 node
= lttng_ht_iter_get_node_ulong(iter
);
752 return caa_container_of(node
, struct ust_id_tracker_node
,
760 int id_tracker_add_id(struct ust_id_tracker
*id_tracker
, int id
)
762 int retval
= LTTNG_OK
;
763 struct ust_id_tracker_node
*tracker_node
;
764 struct lttng_ht_iter iter
;
767 retval
= LTTNG_ERR_INVALID
;
770 tracker_node
= id_tracker_lookup(id_tracker
, id
, &iter
);
772 /* Already exists. */
773 retval
= LTTNG_ERR_ID_TRACKED
;
776 tracker_node
= zmalloc(sizeof(*tracker_node
));
778 retval
= LTTNG_ERR_NOMEM
;
781 lttng_ht_node_init_ulong(&tracker_node
->node
, (unsigned long) id
);
782 lttng_ht_add_unique_ulong(id_tracker
->ht
, &tracker_node
->node
);
788 int id_tracker_del_id(struct ust_id_tracker
*id_tracker
, int id
)
790 int retval
= LTTNG_OK
, ret
;
791 struct ust_id_tracker_node
*tracker_node
;
792 struct lttng_ht_iter iter
;
795 retval
= LTTNG_ERR_INVALID
;
798 tracker_node
= id_tracker_lookup(id_tracker
, id
, &iter
);
801 retval
= LTTNG_ERR_ID_NOT_TRACKED
;
804 ret
= lttng_ht_del(id_tracker
->ht
, &iter
);
807 destroy_id_tracker_node(tracker_node
);
813 struct ust_id_tracker
*get_id_tracker(struct ltt_ust_session
*session
,
814 enum lttng_tracker_type tracker_type
)
816 switch (tracker_type
) {
817 case LTTNG_TRACKER_VPID
:
818 return &session
->vpid_tracker
;
819 case LTTNG_TRACKER_VUID
:
820 return &session
->vuid_tracker
;
821 case LTTNG_TRACKER_VGID
:
822 return &session
->vgid_tracker
;
829 struct lttng_tracker_list
*get_id_tracker_list(struct ltt_ust_session
*session
,
830 enum lttng_tracker_type tracker_type
)
832 switch (tracker_type
) {
833 case LTTNG_TRACKER_VPID
:
834 return session
->tracker_list_vpid
;
835 case LTTNG_TRACKER_VUID
:
836 return session
->tracker_list_vuid
;
837 case LTTNG_TRACKER_VGID
:
838 return session
->tracker_list_vgid
;
845 * The session lock is held when calling this function.
847 int trace_ust_id_tracker_lookup(enum lttng_tracker_type tracker_type
,
848 struct ltt_ust_session
*session
, int id
)
850 struct lttng_ht_iter iter
;
851 struct ust_id_tracker
*id_tracker
;
853 id_tracker
= get_id_tracker(session
, tracker_type
);
857 if (!id_tracker
->ht
) {
860 if (id_tracker_lookup(id_tracker
, id
, &iter
)) {
867 * Called with the session lock held.
869 int trace_ust_track_id(enum lttng_tracker_type tracker_type
,
870 struct ltt_ust_session
*session
,
871 struct lttng_tracker_id
*id
)
873 int retval
= LTTNG_OK
;
874 struct ust_id_tracker
*id_tracker
;
875 struct lttng_tracker_list
*tracker_list
;
878 if (tracker_type
== LTTNG_TRACKER_PID
) {
879 DBG("Backward compatible behavior: translate PID tracker to VPID tracker for UST domain.");
880 tracker_type
= LTTNG_TRACKER_VPID
;
883 retval
= lttng_tracker_id_lookup_string(tracker_type
,
885 if (retval
!= LTTNG_OK
) {
890 tracker_list
= get_id_tracker_list(session
, tracker_type
);
892 return LTTNG_ERR_INVALID
;
894 retval
= lttng_tracker_list_add(tracker_list
, id
);
895 if (retval
!= LTTNG_OK
) {
899 id_tracker
= get_id_tracker(session
, tracker_type
);
904 /* Track all ids: destroy tracker if exists. */
905 if (id_tracker
->ht
) {
906 fini_id_tracker(id_tracker
);
907 /* Ensure all apps have session. */
908 ust_app_global_update_all(session
);
911 if (!id_tracker
->ht
) {
912 /* Create tracker. */
913 retval
= init_id_tracker(id_tracker
);
914 if (retval
!= LTTNG_OK
) {
915 ERR("Error initializing ID tracker");
918 retval
= id_tracker_add_id(id_tracker
, value
);
919 if (retval
!= LTTNG_OK
) {
920 fini_id_tracker(id_tracker
);
923 /* Keep only apps matching ID. */
924 ust_app_global_update_all(session
);
928 retval
= id_tracker_add_id(id_tracker
, value
);
929 if (retval
!= LTTNG_OK
) {
932 /* Add session to application */
933 switch (tracker_type
) {
934 case LTTNG_TRACKER_VPID
:
935 app
= ust_app_find_by_pid(value
);
937 ust_app_global_update(session
, app
);
941 /* Keep only apps matching ID. */
942 ust_app_global_update_all(session
);
951 * Called with the session lock held.
953 int trace_ust_untrack_id(enum lttng_tracker_type tracker_type
,
954 struct ltt_ust_session
*session
, struct lttng_tracker_id
*id
)
956 int retval
= LTTNG_OK
;
957 struct ust_id_tracker
*id_tracker
;
958 struct lttng_tracker_list
*tracker_list
;
961 if (tracker_type
== LTTNG_TRACKER_PID
) {
962 DBG("Backward compatible behavior: translate PID tracker to VPID tracker for UST domain.");
963 tracker_type
= LTTNG_TRACKER_VPID
;
966 retval
= lttng_tracker_id_lookup_string(tracker_type
,
968 if (retval
!= LTTNG_OK
) {
972 /* Remove from list. */
973 tracker_list
= get_id_tracker_list(session
, tracker_type
);
975 return LTTNG_ERR_INVALID
;
977 retval
= lttng_tracker_list_remove(tracker_list
, id
);
978 if (retval
!= LTTNG_OK
) {
982 id_tracker
= get_id_tracker(session
, tracker_type
);
988 /* Create empty tracker, replace old tracker. */
989 struct ust_id_tracker tmp_tracker
;
991 tmp_tracker
= *id_tracker
;
992 retval
= init_id_tracker(id_tracker
);
993 if (retval
!= LTTNG_OK
) {
994 ERR("Error initializing ID tracker");
995 /* Rollback operation. */
996 *id_tracker
= tmp_tracker
;
999 fini_id_tracker(&tmp_tracker
);
1001 /* Keep only apps matching ID. */
1002 ust_app_global_update_all(session
);
1004 struct ust_app
*app
;
1006 if (!id_tracker
->ht
) {
1007 /* No ID being tracked. */
1008 retval
= LTTNG_ERR_ID_NOT_TRACKED
;
1011 /* Remove ID from tracker */
1012 retval
= id_tracker_del_id(id_tracker
, value
);
1013 if (retval
!= LTTNG_OK
) {
1016 switch (tracker_type
) {
1017 case LTTNG_TRACKER_VPID
:
1018 /* Remove session from application. */
1019 app
= ust_app_find_by_pid(value
);
1021 ust_app_global_update(session
, app
);
1025 /* Keep only apps matching ID. */
1026 ust_app_global_update_all(session
);
1034 * Called with session lock held.
1036 ssize_t
trace_ust_list_tracker_ids(enum lttng_tracker_type tracker_type
,
1037 struct ltt_ust_session
*session
,
1038 struct lttng_tracker_id
**_ids
)
1040 struct lttng_tracker_list
*tracker_list
;
1042 if (tracker_type
== LTTNG_TRACKER_PID
) {
1043 DBG("Backward compatible behavior: translate PID tracker to VPID tracker for UST domain.");
1044 tracker_type
= LTTNG_TRACKER_VPID
;
1047 tracker_list
= get_id_tracker_list(session
, tracker_type
);
1048 if (!tracker_list
) {
1049 return -LTTNG_ERR_INVALID
;
1051 return lttng_tracker_id_get_list(tracker_list
, _ids
);
1055 * RCU safe free context structure.
1057 static void destroy_context_rcu(struct rcu_head
*head
)
1059 struct lttng_ht_node_ulong
*node
=
1060 caa_container_of(head
, struct lttng_ht_node_ulong
, head
);
1061 struct ltt_ust_context
*ctx
=
1062 caa_container_of(node
, struct ltt_ust_context
, node
);
1064 trace_ust_destroy_context(ctx
);
1068 * Cleanup UST context hash table.
1070 static void destroy_contexts(struct lttng_ht
*ht
)
1073 struct lttng_ht_node_ulong
*node
;
1074 struct lttng_ht_iter iter
;
1075 struct ltt_ust_context
*ctx
;
1080 cds_lfht_for_each_entry(ht
->ht
, &iter
.iter
, node
, node
) {
1081 /* Remove from ordered list. */
1082 ctx
= caa_container_of(node
, struct ltt_ust_context
, node
);
1083 cds_list_del(&ctx
->list
);
1084 /* Remove from channel's hash table. */
1085 ret
= lttng_ht_del(ht
, &iter
);
1087 call_rcu(&node
->head
, destroy_context_rcu
);
1092 ht_cleanup_push(ht
);
1096 * Cleanup ust event structure.
1098 void trace_ust_destroy_event(struct ltt_ust_event
*event
)
1102 DBG2("Trace destroy UST event %s", event
->attr
.name
);
1103 free(event
->filter_expression
);
1104 free(event
->filter
);
1105 free(event
->exclusion
);
1110 * Cleanup ust context structure.
1112 void trace_ust_destroy_context(struct ltt_ust_context
*ctx
)
1116 if (ctx
->ctx
.ctx
== LTTNG_UST_CONTEXT_APP_CONTEXT
) {
1117 free(ctx
->ctx
.u
.app_ctx
.provider_name
);
1118 free(ctx
->ctx
.u
.app_ctx
.ctx_name
);
1124 * URCU intermediate call to complete destroy event.
1126 static void destroy_event_rcu(struct rcu_head
*head
)
1128 struct lttng_ht_node_str
*node
=
1129 caa_container_of(head
, struct lttng_ht_node_str
, head
);
1130 struct ltt_ust_event
*event
=
1131 caa_container_of(node
, struct ltt_ust_event
, node
);
1133 trace_ust_destroy_event(event
);
1137 * Cleanup UST events hashtable.
1139 static void destroy_events(struct lttng_ht
*events
)
1142 struct lttng_ht_node_str
*node
;
1143 struct lttng_ht_iter iter
;
1148 cds_lfht_for_each_entry(events
->ht
, &iter
.iter
, node
, node
) {
1149 ret
= lttng_ht_del(events
, &iter
);
1151 call_rcu(&node
->head
, destroy_event_rcu
);
1155 ht_cleanup_push(events
);
1159 * Cleanup ust channel structure.
1161 * Should _NOT_ be called with RCU read lock held.
1163 static void _trace_ust_destroy_channel(struct ltt_ust_channel
*channel
)
1167 DBG2("Trace destroy UST channel %s", channel
->name
);
1173 * URCU intermediate call to complete destroy channel.
1175 static void destroy_channel_rcu(struct rcu_head
*head
)
1177 struct lttng_ht_node_str
*node
=
1178 caa_container_of(head
, struct lttng_ht_node_str
, head
);
1179 struct ltt_ust_channel
*channel
=
1180 caa_container_of(node
, struct ltt_ust_channel
, node
);
1182 _trace_ust_destroy_channel(channel
);
1185 void trace_ust_destroy_channel(struct ltt_ust_channel
*channel
)
1187 /* Destroying all events of the channel */
1188 destroy_events(channel
->events
);
1189 /* Destroying all context of the channel */
1190 destroy_contexts(channel
->ctx
);
1192 call_rcu(&channel
->node
.head
, destroy_channel_rcu
);
1196 * Remove an UST channel from a channel HT.
1198 void trace_ust_delete_channel(struct lttng_ht
*ht
,
1199 struct ltt_ust_channel
*channel
)
1202 struct lttng_ht_iter iter
;
1207 iter
.iter
.node
= &channel
->node
.node
;
1208 ret
= lttng_ht_del(ht
, &iter
);
1213 * Iterate over a hash table containing channels and cleanup safely.
1215 static void destroy_channels(struct lttng_ht
*channels
)
1217 struct lttng_ht_node_str
*node
;
1218 struct lttng_ht_iter iter
;
1223 cds_lfht_for_each_entry(channels
->ht
, &iter
.iter
, node
, node
) {
1224 struct ltt_ust_channel
*chan
=
1225 caa_container_of(node
, struct ltt_ust_channel
, node
);
1227 trace_ust_delete_channel(channels
, chan
);
1228 trace_ust_destroy_channel(chan
);
1232 ht_cleanup_push(channels
);
1236 * Cleanup UST global domain.
1238 static void destroy_domain_global(struct ltt_ust_domain_global
*dom
)
1242 destroy_channels(dom
->channels
);
1246 * Cleanup ust session structure
1248 * Should *NOT* be called with RCU read-side lock held.
1250 void trace_ust_destroy_session(struct ltt_ust_session
*session
)
1253 struct buffer_reg_uid
*reg
, *sreg
;
1254 struct lttng_ht_iter iter
;
1258 DBG2("Trace UST destroy session %" PRIu64
, session
->id
);
1260 /* Cleaning up UST domain */
1261 destroy_domain_global(&session
->domain_global
);
1264 cds_lfht_for_each_entry(session
->agents
->ht
, &iter
.iter
, agt
, node
.node
) {
1265 int ret
= lttng_ht_del(session
->agents
, &iter
);
1272 ht_cleanup_push(session
->agents
);
1274 /* Cleanup UID buffer registry object(s). */
1275 cds_list_for_each_entry_safe(reg
, sreg
, &session
->buffer_reg_uid_list
,
1277 cds_list_del(®
->lnode
);
1278 buffer_reg_uid_remove(reg
);
1279 buffer_reg_uid_destroy(reg
, session
->consumer
);
1282 consumer_output_put(session
->consumer
);
1284 lttng_tracker_list_destroy(session
->tracker_list_vpid
);
1285 lttng_tracker_list_destroy(session
->tracker_list_vuid
);
1286 lttng_tracker_list_destroy(session
->tracker_list_vgid
);
1288 fini_id_tracker(&session
->vpid_tracker
);
1289 fini_id_tracker(&session
->vuid_tracker
);
1290 fini_id_tracker(&session
->vgid_tracker
);