4 * Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 * Mimic system calls for:
9 * - session creation, returns an object descriptor or failure.
10 * - channel creation, returns an object descriptor or failure.
11 * - Operates on a session object descriptor
12 * - Takes all channel options as parameters.
13 * - stream get, returns an object descriptor or failure.
14 * - Operates on a channel object descriptor.
15 * - stream notifier get, returns an object descriptor or failure.
16 * - Operates on a channel object descriptor.
17 * - event creation, returns an object descriptor or failure.
18 * - Operates on a channel object descriptor
19 * - Takes an event name as parameter
20 * - Takes an instrumentation source as parameter
21 * - e.g. tracepoints, dynamic_probes...
22 * - Takes instrumentation source specific arguments.
24 * Dual LGPL v2.1/GPL v2 license.
27 #include <lttng/ust-abi.h>
28 #include <urcu/compiler.h>
29 #include <urcu/list.h>
30 #include <lttng/ust-events.h>
31 #include <lttng/ust-version.h>
32 #include <lttng/tracepoint.h>
33 #include "tracepoint-internal.h"
34 #include <usterr-signal-safe.h>
36 #include "ltt-tracer.h"
38 static int lttng_ust_abi_close_in_progress
;
41 int lttng_abi_tracepoint_list(void);
44 * Object descriptor table. Should be protected from concurrent access
48 struct lttng_ust_obj
{
52 const struct lttng_ust_objd_ops
*ops
;
55 int freelist_next
; /* offset freelist. end is -1. */
59 struct lttng_ust_objd_table
{
60 struct lttng_ust_obj
*array
;
61 unsigned int len
, allocated_len
;
62 int freelist_head
; /* offset freelist head. end is -1 */
65 static struct lttng_ust_objd_table objd_table
= {
70 int objd_alloc(void *private_data
, const struct lttng_ust_objd_ops
*ops
)
72 struct lttng_ust_obj
*obj
;
74 if (objd_table
.freelist_head
!= -1) {
75 obj
= &objd_table
.array
[objd_table
.freelist_head
];
76 objd_table
.freelist_head
= obj
->u
.freelist_next
;
80 if (objd_table
.len
>= objd_table
.allocated_len
) {
81 unsigned int new_allocated_len
, old_allocated_len
;
82 struct lttng_ust_obj
*new_table
, *old_table
;
84 old_allocated_len
= objd_table
.allocated_len
;
85 old_table
= objd_table
.array
;
86 if (!old_allocated_len
)
87 new_allocated_len
= 1;
89 new_allocated_len
= old_allocated_len
<< 1;
90 new_table
= zmalloc(sizeof(struct lttng_ust_obj
) * new_allocated_len
);
93 memcpy(new_table
, old_table
,
94 sizeof(struct lttng_ust_obj
) * old_allocated_len
);
96 objd_table
.array
= new_table
;
97 objd_table
.allocated_len
= new_allocated_len
;
99 obj
= &objd_table
.array
[objd_table
.len
];
102 obj
->u
.s
.private_data
= private_data
;
104 obj
->u
.s
.f_count
= 2; /* count == 1 : object is allocated */
105 /* count == 2 : allocated + hold ref */
106 return obj
- objd_table
.array
;
110 struct lttng_ust_obj
*_objd_get(int id
)
112 if (id
>= objd_table
.len
)
114 if (!objd_table
.array
[id
].u
.s
.f_count
)
116 return &objd_table
.array
[id
];
120 void *objd_private(int id
)
122 struct lttng_ust_obj
*obj
= _objd_get(id
);
124 return obj
->u
.s
.private_data
;
128 void objd_set_private(int id
, void *private_data
)
130 struct lttng_ust_obj
*obj
= _objd_get(id
);
132 obj
->u
.s
.private_data
= private_data
;
135 const struct lttng_ust_objd_ops
*objd_ops(int id
)
137 struct lttng_ust_obj
*obj
= _objd_get(id
);
145 void objd_free(int id
)
147 struct lttng_ust_obj
*obj
= _objd_get(id
);
150 obj
->u
.freelist_next
= objd_table
.freelist_head
;
151 objd_table
.freelist_head
= obj
- objd_table
.array
;
152 assert(obj
->u
.s
.f_count
== 1);
153 obj
->u
.s
.f_count
= 0; /* deallocated */
157 void objd_ref(int id
)
159 struct lttng_ust_obj
*obj
= _objd_get(id
);
163 int lttng_ust_objd_unref(int id
)
165 struct lttng_ust_obj
*obj
= _objd_get(id
);
169 if (obj
->u
.s
.f_count
== 1) {
170 ERR("Reference counting error\n");
173 if ((--obj
->u
.s
.f_count
) == 1) {
174 const struct lttng_ust_objd_ops
*ops
= objd_ops(id
);
184 void objd_table_destroy(void)
188 for (i
= 0; i
< objd_table
.allocated_len
; i
++)
189 (void) lttng_ust_objd_unref(i
);
190 free(objd_table
.array
);
191 objd_table
.array
= NULL
;
193 objd_table
.allocated_len
= 0;
194 objd_table
.freelist_head
= -1;
198 * This is LTTng's own personal way to create an ABI for sessiond.
199 * We send commands over a socket.
202 static const struct lttng_ust_objd_ops lttng_ops
;
203 static const struct lttng_ust_objd_ops lttng_session_ops
;
204 static const struct lttng_ust_objd_ops lttng_channel_ops
;
205 static const struct lttng_ust_objd_ops lttng_metadata_ops
;
206 static const struct lttng_ust_objd_ops lttng_event_ops
;
207 static const struct lttng_ust_objd_ops lttng_wildcard_ops
;
208 static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops
;
209 static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops
;
216 int lttng_abi_create_root_handle(void)
220 root_handle
= objd_alloc(NULL
, <tng_ops
);
225 int lttng_abi_create_session(void)
227 struct ltt_session
*session
;
228 int session_objd
, ret
;
230 session
= ltt_session_create();
233 session_objd
= objd_alloc(session
, <tng_session_ops
);
234 if (session_objd
< 0) {
238 session
->objd
= session_objd
;
242 ltt_session_destroy(session
);
247 long lttng_abi_tracer_version(int objd
,
248 struct lttng_ust_tracer_version
*v
)
250 v
->major
= LTTNG_UST_MAJOR_VERSION
;
251 v
->minor
= LTTNG_UST_MINOR_VERSION
;
252 v
->patchlevel
= LTTNG_UST_PATCHLEVEL_VERSION
;
257 long lttng_abi_add_context(int objd
,
258 struct lttng_ust_context
*context_param
,
259 struct lttng_ctx
**ctx
, struct ltt_session
*session
)
261 if (session
->been_active
)
264 switch (context_param
->ctx
) {
265 case LTTNG_UST_CONTEXT_PTHREAD_ID
:
266 return lttng_add_pthread_id_to_ctx(ctx
);
267 case LTTNG_UST_CONTEXT_VTID
:
268 return lttng_add_vtid_to_ctx(ctx
);
269 case LTTNG_UST_CONTEXT_VPID
:
270 return lttng_add_vpid_to_ctx(ctx
);
271 case LTTNG_UST_CONTEXT_PROCNAME
:
272 return lttng_add_procname_to_ctx(ctx
);
279 * lttng_cmd - lttng control through socket commands
281 * @objd: the object descriptor
284 * @uargs: UST arguments (internal)
286 * This descriptor implements lttng commands:
288 * Returns a LTTng trace session object descriptor
289 * LTTNG_UST_TRACER_VERSION
290 * Returns the LTTng kernel tracer version
291 * LTTNG_UST_TRACEPOINT_LIST
292 * Returns a file descriptor listing available tracepoints
293 * LTTNG_UST_WAIT_QUIESCENT
294 * Returns after all previously running probes have completed
296 * The returned session will be deleted when its file descriptor is closed.
299 long lttng_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
300 union ust_args
*uargs
)
303 case LTTNG_UST_SESSION
:
304 return lttng_abi_create_session();
305 case LTTNG_UST_TRACER_VERSION
:
306 return lttng_abi_tracer_version(objd
,
307 (struct lttng_ust_tracer_version
*) arg
);
308 case LTTNG_UST_TRACEPOINT_LIST
:
309 return lttng_abi_tracepoint_list();
310 case LTTNG_UST_WAIT_QUIESCENT
:
318 static const struct lttng_ust_objd_ops lttng_ops
= {
323 * We tolerate no failure in this function (if one happens, we print a dmesg
324 * error, but cannot return any error, because the channel information is
328 void lttng_metadata_create_events(int channel_objd
)
330 struct ltt_channel
*channel
= objd_private(channel_objd
);
331 static struct lttng_ust_event metadata_params
= {
332 .instrumentation
= LTTNG_UST_TRACEPOINT
,
333 .name
= "lttng_ust:metadata",
334 .loglevel_type
= LTTNG_UST_LOGLEVEL_ALL
,
335 .loglevel
= TRACE_DEFAULT
,
337 struct ltt_event
*event
;
341 * We tolerate no failure path after event creation. It will stay
342 * invariant for the rest of the session.
344 ret
= ltt_event_create(channel
, &metadata_params
, NULL
, &event
);
352 return; /* not allowed to return error */
355 int lttng_abi_create_channel(int session_objd
,
356 struct lttng_ust_channel
*chan_param
,
357 enum channel_type channel_type
,
358 union ust_args
*uargs
)
360 struct ltt_session
*session
= objd_private(session_objd
);
361 const struct lttng_ust_objd_ops
*ops
;
362 const char *transport_name
;
363 struct ltt_channel
*chan
;
366 struct ltt_channel chan_priv_init
;
368 switch (channel_type
) {
369 case PER_CPU_CHANNEL
:
370 if (chan_param
->output
== LTTNG_UST_MMAP
) {
371 transport_name
= chan_param
->overwrite
?
372 "relay-overwrite-mmap" : "relay-discard-mmap";
376 ops
= <tng_channel_ops
;
378 case METADATA_CHANNEL
:
379 if (chan_param
->output
== LTTNG_UST_MMAP
)
380 transport_name
= "relay-metadata-mmap";
383 ops
= <tng_metadata_ops
;
386 transport_name
= "<unknown>";
389 chan_objd
= objd_alloc(NULL
, ops
);
394 memset(&chan_priv_init
, 0, sizeof(chan_priv_init
));
395 /* Copy of session UUID for consumer (availability through shm) */
396 memcpy(chan_priv_init
.uuid
, session
->uuid
, sizeof(session
->uuid
));
399 * We tolerate no failure path after channel creation. It will stay
400 * invariant for the rest of the session.
402 chan
= ltt_channel_create(session
, transport_name
, NULL
,
403 chan_param
->subbuf_size
,
404 chan_param
->num_subbuf
,
405 chan_param
->switch_timer_interval
,
406 chan_param
->read_timer_interval
,
407 &uargs
->channel
.shm_fd
,
408 &uargs
->channel
.wait_fd
,
409 &uargs
->channel
.memory_map_size
,
415 objd_set_private(chan_objd
, chan
);
416 chan
->objd
= chan_objd
;
417 if (channel_type
== METADATA_CHANNEL
) {
418 session
->metadata
= chan
;
419 lttng_metadata_create_events(chan_objd
);
421 /* The channel created holds a reference on the session */
422 objd_ref(session_objd
);
430 err
= lttng_ust_objd_unref(chan_objd
);
438 * lttng_session_cmd - lttng session object command
443 * @uargs: UST arguments (internal)
445 * This descriptor implements lttng commands:
447 * Returns a LTTng channel object descriptor
449 * Enables tracing for a session (weak enable)
451 * Disables tracing for a session (strong disable)
453 * Returns a LTTng metadata object descriptor
455 * The returned channel will be deleted when its file descriptor is closed.
458 long lttng_session_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
459 union ust_args
*uargs
)
461 struct ltt_session
*session
= objd_private(objd
);
464 case LTTNG_UST_CHANNEL
:
465 return lttng_abi_create_channel(objd
,
466 (struct lttng_ust_channel
*) arg
,
467 PER_CPU_CHANNEL
, uargs
);
468 case LTTNG_UST_SESSION_START
:
469 case LTTNG_UST_ENABLE
:
470 return ltt_session_enable(session
);
471 case LTTNG_UST_SESSION_STOP
:
472 case LTTNG_UST_DISABLE
:
473 return ltt_session_disable(session
);
474 case LTTNG_UST_METADATA
:
475 return lttng_abi_create_channel(objd
,
476 (struct lttng_ust_channel
*) arg
,
477 METADATA_CHANNEL
, uargs
);
484 * Called when the last file reference is dropped.
486 * Big fat note: channels and events are invariant for the whole session after
487 * their creation. So this session destruction also destroys all channel and
488 * event structures specific to this session (they are not destroyed when their
489 * individual file is released).
492 int lttng_release_session(int objd
)
494 struct ltt_session
*session
= objd_private(objd
);
497 ltt_session_destroy(session
);
504 static const struct lttng_ust_objd_ops lttng_session_ops
= {
505 .release
= lttng_release_session
,
506 .cmd
= lttng_session_cmd
,
510 long lttng_tracepoint_list_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
511 union ust_args
*uargs
)
513 struct lttng_ust_tracepoint_list
*list
= objd_private(objd
);
514 struct lttng_ust_tracepoint_iter
*tp
=
515 (struct lttng_ust_tracepoint_iter
*) arg
;
516 struct lttng_ust_tracepoint_iter
*iter
;
519 case LTTNG_UST_TRACEPOINT_LIST_GET
:
522 iter
= lttng_ust_tracepoint_list_get_iter_next(list
);
525 if (!strcmp(iter
->name
, "lttng_ust:metadata"))
527 memcpy(tp
, iter
, sizeof(*tp
));
536 int lttng_abi_tracepoint_list(void)
539 struct lttng_ust_tracepoint_list
*list
;
541 list_objd
= objd_alloc(NULL
, <tng_tracepoint_list_ops
);
546 list
= zmalloc(sizeof(*list
));
551 objd_set_private(list_objd
, list
);
553 /* populate list by walking on all registered probes. */
554 ret
= ltt_probes_get_event_list(list
);
566 err
= lttng_ust_objd_unref(list_objd
);
574 int lttng_release_tracepoint_list(int objd
)
576 struct lttng_ust_tracepoint_list
*list
= objd_private(objd
);
579 ltt_probes_prune_event_list(list
);
587 static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops
= {
588 .release
= lttng_release_tracepoint_list
,
589 .cmd
= lttng_tracepoint_list_cmd
,
592 struct stream_priv_data
{
593 struct lttng_ust_lib_ring_buffer
*buf
;
594 struct ltt_channel
*ltt_chan
;
598 int lttng_abi_open_stream(int channel_objd
, struct lttng_ust_stream
*info
,
599 union ust_args
*uargs
)
601 struct ltt_channel
*channel
= objd_private(channel_objd
);
602 struct lttng_ust_lib_ring_buffer
*buf
;
603 struct stream_priv_data
*priv
;
604 int stream_objd
, ret
;
606 buf
= channel
->ops
->buffer_read_open(channel
->chan
, channel
->handle
,
607 &uargs
->stream
.shm_fd
,
608 &uargs
->stream
.wait_fd
,
609 &uargs
->stream
.memory_map_size
);
613 priv
= zmalloc(sizeof(*priv
));
619 priv
->ltt_chan
= channel
;
620 stream_objd
= objd_alloc(priv
, &lib_ring_buffer_objd_ops
);
621 if (stream_objd
< 0) {
625 /* Hold a reference on the channel object descriptor */
626 objd_ref(channel_objd
);
632 channel
->ops
->buffer_read_close(buf
, channel
->handle
);
637 int lttng_abi_create_event(int channel_objd
,
638 struct lttng_ust_event
*event_param
)
640 struct ltt_channel
*channel
= objd_private(channel_objd
);
641 struct ltt_event
*event
;
644 event_param
->name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
645 event_objd
= objd_alloc(NULL
, <tng_event_ops
);
646 if (event_objd
< 0) {
651 * We tolerate no failure path after event creation. It will stay
652 * invariant for the rest of the session.
654 ret
= ltt_event_create(channel
, event_param
, NULL
, &event
);
658 objd_set_private(event_objd
, event
);
659 /* The event holds a reference on the channel */
660 objd_ref(channel_objd
);
667 err
= lttng_ust_objd_unref(event_objd
);
675 int lttng_abi_create_wildcard(int channel_objd
,
676 struct lttng_ust_event
*event_param
)
678 struct ltt_channel
*channel
= objd_private(channel_objd
);
679 struct session_wildcard
*wildcard
;
680 int wildcard_objd
, ret
;
682 event_param
->name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
683 wildcard_objd
= objd_alloc(NULL
, <tng_wildcard_ops
);
684 if (wildcard_objd
< 0) {
689 * We tolerate no failure path after wildcard creation. It will
690 * stay invariant for the rest of the session.
692 ret
= ltt_wildcard_create(channel
, event_param
, &wildcard
);
696 objd_set_private(wildcard_objd
, wildcard
);
697 /* The wildcard holds a reference on the channel */
698 objd_ref(channel_objd
);
699 return wildcard_objd
;
705 err
= lttng_ust_objd_unref(wildcard_objd
);
713 * lttng_channel_cmd - lttng control through object descriptors
715 * @objd: the object descriptor
718 * @uargs: UST arguments (internal)
720 * This object descriptor implements lttng commands:
722 * Returns an event stream object descriptor or failure.
723 * (typically, one event stream records events from one CPU)
725 * Returns an event object descriptor or failure.
727 * Prepend a context field to each event in the channel
729 * Enable recording for events in this channel (weak enable)
731 * Disable recording for events in this channel (strong disable)
733 * Channel and event file descriptors also hold a reference on the session.
736 long lttng_channel_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
737 union ust_args
*uargs
)
739 struct ltt_channel
*channel
= objd_private(objd
);
742 case LTTNG_UST_STREAM
:
744 struct lttng_ust_stream
*stream
;
746 stream
= (struct lttng_ust_stream
*) arg
;
747 /* stream used as output */
748 return lttng_abi_open_stream(objd
, stream
, uargs
);
750 case LTTNG_UST_EVENT
:
752 struct lttng_ust_event
*event_param
=
753 (struct lttng_ust_event
*) arg
;
754 if (event_param
->name
[strlen(event_param
->name
) - 1] == '*') {
755 /* If ends with wildcard, create wildcard. */
756 return lttng_abi_create_wildcard(objd
, event_param
);
758 return lttng_abi_create_event(objd
, event_param
);
761 case LTTNG_UST_CONTEXT
:
762 return lttng_abi_add_context(objd
,
763 (struct lttng_ust_context
*) arg
,
764 &channel
->ctx
, channel
->session
);
765 case LTTNG_UST_ENABLE
:
766 return ltt_channel_enable(channel
);
767 case LTTNG_UST_DISABLE
:
768 return ltt_channel_disable(channel
);
769 case LTTNG_UST_FLUSH_BUFFER
:
770 return channel
->ops
->flush_buffer(channel
->chan
, channel
->handle
);
777 * lttng_metadata_cmd - lttng control through object descriptors
779 * @objd: the object descriptor
782 * @uargs: UST arguments (internal)
784 * This object descriptor implements lttng commands:
786 * Returns an event stream file descriptor or failure.
788 * Channel and event file descriptors also hold a reference on the session.
791 long lttng_metadata_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
792 union ust_args
*uargs
)
794 struct ltt_channel
*channel
= objd_private(objd
);
797 case LTTNG_UST_STREAM
:
799 struct lttng_ust_stream
*stream
;
801 stream
= (struct lttng_ust_stream
*) arg
;
802 /* stream used as output */
803 return lttng_abi_open_stream(objd
, stream
, uargs
);
805 case LTTNG_UST_FLUSH_BUFFER
:
806 return channel
->ops
->flush_buffer(channel
->chan
, channel
->handle
);
814 * lttng_channel_poll - lttng stream addition/removal monitoring
819 unsigned int lttng_channel_poll(struct file
*file
, poll_table
*wait
)
821 struct ltt_channel
*channel
= file
->private_data
;
822 unsigned int mask
= 0;
824 if (file
->f_mode
& FMODE_READ
) {
825 poll_wait_set_exclusive(wait
);
826 poll_wait(file
, channel
->ops
->get_hp_wait_queue(channel
->chan
),
829 if (channel
->ops
->is_disabled(channel
->chan
))
831 if (channel
->ops
->is_finalized(channel
->chan
))
833 if (channel
->ops
->buffer_has_read_closed_stream(channel
->chan
))
834 return POLLIN
| POLLRDNORM
;
843 int lttng_channel_release(int objd
)
845 struct ltt_channel
*channel
= objd_private(objd
);
848 return lttng_ust_objd_unref(channel
->session
->objd
);
852 static const struct lttng_ust_objd_ops lttng_channel_ops
= {
853 .release
= lttng_channel_release
,
854 //.poll = lttng_channel_poll,
855 .cmd
= lttng_channel_cmd
,
858 static const struct lttng_ust_objd_ops lttng_metadata_ops
= {
859 .release
= lttng_channel_release
,
860 .cmd
= lttng_metadata_cmd
,
864 * lttng_rb_cmd - lttng ring buffer control through object descriptors
866 * @objd: the object descriptor
869 * @uargs: UST arguments (internal)
871 * This object descriptor implements lttng commands:
872 * (None for now. Access is done directly though shm.)
875 long lttng_rb_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
876 union ust_args
*uargs
)
885 int lttng_rb_release(int objd
)
887 struct stream_priv_data
*priv
= objd_private(objd
);
888 struct lttng_ust_lib_ring_buffer
*buf
;
889 struct ltt_channel
*channel
;
893 channel
= priv
->ltt_chan
;
896 * If we are at ABI exit, we don't want to close the
897 * buffer opened for read: it is being shared between
898 * the parent and child (right after fork), and we don't
899 * want the child to close it for the parent. For a real
900 * exit, we don't care about marking it as closed, as
901 * the consumer daemon (if there is one) will do fine
902 * even if we don't mark it as "closed" for reading on
904 * We only mark it as closed if it is being explicitely
905 * released by the session daemon with an explicit
908 if (!lttng_ust_abi_close_in_progress
)
909 channel
->ops
->buffer_read_close(buf
, channel
->handle
);
911 return lttng_ust_objd_unref(channel
->objd
);
916 static const struct lttng_ust_objd_ops lib_ring_buffer_objd_ops
= {
917 .release
= lttng_rb_release
,
922 * lttng_event_cmd - lttng control through object descriptors
924 * @objd: the object descriptor
927 * @uargs: UST arguments (internal)
929 * This object descriptor implements lttng commands:
931 * Prepend a context field to each record of this event
933 * Enable recording for this event (weak enable)
935 * Disable recording for this event (strong disable)
938 long lttng_event_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
939 union ust_args
*uargs
)
941 struct ltt_event
*event
= objd_private(objd
);
944 case LTTNG_UST_CONTEXT
:
945 return lttng_abi_add_context(objd
,
946 (struct lttng_ust_context
*) arg
,
947 &event
->ctx
, event
->chan
->session
);
948 case LTTNG_UST_ENABLE
:
949 return ltt_event_enable(event
);
950 case LTTNG_UST_DISABLE
:
951 return ltt_event_disable(event
);
958 int lttng_event_release(int objd
)
960 struct ltt_event
*event
= objd_private(objd
);
963 return lttng_ust_objd_unref(event
->chan
->objd
);
967 /* TODO: filter control ioctl */
968 static const struct lttng_ust_objd_ops lttng_event_ops
= {
969 .release
= lttng_event_release
,
970 .cmd
= lttng_event_cmd
,
974 * lttng_wildcard_cmd - lttng control through object descriptors
976 * @objd: the object descriptor
979 * @uargs: UST arguments (internal)
981 * This object descriptor implements lttng commands:
983 * Prepend a context field to each record of events of this
986 * Enable recording for these wildcard events (weak enable)
988 * Disable recording for these wildcard events (strong disable)
991 long lttng_wildcard_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
992 union ust_args
*uargs
)
994 struct session_wildcard
*wildcard
= objd_private(objd
);
997 case LTTNG_UST_CONTEXT
:
998 return -ENOSYS
; /* not implemented yet */
1000 return lttng_abi_add_context(objd
,
1001 (struct lttng_ust_context
*) arg
,
1002 &wildcard
->ctx
, wildcard
->chan
->session
);
1004 case LTTNG_UST_ENABLE
:
1005 return ltt_wildcard_enable(wildcard
);
1006 case LTTNG_UST_DISABLE
:
1007 return ltt_wildcard_disable(wildcard
);
1014 int lttng_wildcard_release(int objd
)
1016 struct session_wildcard
*wildcard
= objd_private(objd
);
1019 return lttng_ust_objd_unref(wildcard
->chan
->objd
);
1023 /* TODO: filter control ioctl */
1024 static const struct lttng_ust_objd_ops lttng_wildcard_ops
= {
1025 .release
= lttng_wildcard_release
,
1026 .cmd
= lttng_wildcard_cmd
,
1029 void lttng_ust_abi_exit(void)
1031 lttng_ust_abi_close_in_progress
= 1;
1032 objd_table_destroy();
1033 lttng_ust_abi_close_in_progress
= 0;