6 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
8 * This library is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU Lesser General Public
10 * License as published by the Free Software Foundation; only
11 * version 2.1 of the License.
13 * This library is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * Lesser General Public License for more details.
18 * You should have received a copy of the GNU Lesser General Public
19 * License along with this library; if not, write to the Free Software
20 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
23 * Mimic system calls for:
24 * - session creation, returns an object descriptor or failure.
25 * - channel creation, returns an object descriptor or failure.
26 * - Operates on a session object descriptor
27 * - Takes all channel options as parameters.
28 * - stream get, returns an object descriptor or failure.
29 * - Operates on a channel object descriptor.
30 * - stream notifier get, returns an object descriptor or failure.
31 * - Operates on a channel object descriptor.
32 * - event creation, returns an object descriptor or failure.
33 * - Operates on a channel object descriptor
34 * - Takes an event name as parameter
35 * - Takes an instrumentation source as parameter
36 * - e.g. tracepoints, dynamic_probes...
37 * - Takes instrumentation source specific arguments.
40 #include <lttng/ust-abi.h>
41 #include <lttng/ust-error.h>
42 #include <urcu/compiler.h>
43 #include <urcu/list.h>
44 #include <lttng/ust-events.h>
45 #include <lttng/ust-version.h>
46 #include <lttng/tracepoint.h>
47 #include "tracepoint-internal.h"
48 #include <usterr-signal-safe.h>
50 #include "lttng-tracer.h"
51 #include "../libringbuffer/shm.h"
52 #include "../libringbuffer/frontend_types.h"
54 #define OBJ_NAME_LEN 16
56 static int lttng_ust_abi_close_in_progress
;
59 int lttng_abi_tracepoint_list(void *owner
);
61 int lttng_abi_tracepoint_field_list(void *owner
);
64 * Object descriptor table. Should be protected from concurrent access
68 struct lttng_ust_obj
{
72 const struct lttng_ust_objd_ops
*ops
;
75 char name
[OBJ_NAME_LEN
];
77 int freelist_next
; /* offset freelist. end is -1. */
81 struct lttng_ust_objd_table
{
82 struct lttng_ust_obj
*array
;
83 unsigned int len
, allocated_len
;
84 int freelist_head
; /* offset freelist head. end is -1 */
87 static struct lttng_ust_objd_table objd_table
= {
92 int objd_alloc(void *private_data
, const struct lttng_ust_objd_ops
*ops
,
93 void *owner
, const char *name
)
95 struct lttng_ust_obj
*obj
;
97 if (objd_table
.freelist_head
!= -1) {
98 obj
= &objd_table
.array
[objd_table
.freelist_head
];
99 objd_table
.freelist_head
= obj
->u
.freelist_next
;
103 if (objd_table
.len
>= objd_table
.allocated_len
) {
104 unsigned int new_allocated_len
, old_allocated_len
;
105 struct lttng_ust_obj
*new_table
, *old_table
;
107 old_allocated_len
= objd_table
.allocated_len
;
108 old_table
= objd_table
.array
;
109 if (!old_allocated_len
)
110 new_allocated_len
= 1;
112 new_allocated_len
= old_allocated_len
<< 1;
113 new_table
= zmalloc(sizeof(struct lttng_ust_obj
) * new_allocated_len
);
116 memcpy(new_table
, old_table
,
117 sizeof(struct lttng_ust_obj
) * old_allocated_len
);
119 objd_table
.array
= new_table
;
120 objd_table
.allocated_len
= new_allocated_len
;
122 obj
= &objd_table
.array
[objd_table
.len
];
125 obj
->u
.s
.private_data
= private_data
;
127 obj
->u
.s
.f_count
= 2; /* count == 1 : object is allocated */
128 /* count == 2 : allocated + hold ref */
129 obj
->u
.s
.owner
= owner
;
130 strncpy(obj
->u
.s
.name
, name
, OBJ_NAME_LEN
);
131 obj
->u
.s
.name
[OBJ_NAME_LEN
- 1] = '\0';
132 return obj
- objd_table
.array
;
136 struct lttng_ust_obj
*_objd_get(int id
)
138 if (id
>= objd_table
.len
)
140 if (!objd_table
.array
[id
].u
.s
.f_count
)
142 return &objd_table
.array
[id
];
146 void *objd_private(int id
)
148 struct lttng_ust_obj
*obj
= _objd_get(id
);
150 return obj
->u
.s
.private_data
;
154 void objd_set_private(int id
, void *private_data
)
156 struct lttng_ust_obj
*obj
= _objd_get(id
);
158 obj
->u
.s
.private_data
= private_data
;
161 const struct lttng_ust_objd_ops
*objd_ops(int id
)
163 struct lttng_ust_obj
*obj
= _objd_get(id
);
171 void objd_free(int id
)
173 struct lttng_ust_obj
*obj
= _objd_get(id
);
176 obj
->u
.freelist_next
= objd_table
.freelist_head
;
177 objd_table
.freelist_head
= obj
- objd_table
.array
;
178 assert(obj
->u
.s
.f_count
== 1);
179 obj
->u
.s
.f_count
= 0; /* deallocated */
183 void objd_ref(int id
)
185 struct lttng_ust_obj
*obj
= _objd_get(id
);
189 int lttng_ust_objd_unref(int id
)
191 struct lttng_ust_obj
*obj
= _objd_get(id
);
195 if (obj
->u
.s
.f_count
== 1) {
196 ERR("Reference counting error\n");
199 if ((--obj
->u
.s
.f_count
) == 1) {
200 const struct lttng_ust_objd_ops
*ops
= objd_ops(id
);
210 void objd_table_destroy(void)
214 for (i
= 0; i
< objd_table
.allocated_len
; i
++)
215 (void) lttng_ust_objd_unref(i
);
216 free(objd_table
.array
);
217 objd_table
.array
= NULL
;
219 objd_table
.allocated_len
= 0;
220 objd_table
.freelist_head
= -1;
223 const char *lttng_ust_obj_get_name(int id
)
225 struct lttng_ust_obj
*obj
= _objd_get(id
);
229 return obj
->u
.s
.name
;
232 void lttng_ust_objd_table_owner_cleanup(void *owner
)
236 for (i
= 0; i
< objd_table
.allocated_len
; i
++) {
237 struct lttng_ust_obj
*obj
;
243 continue; /* skip root handles */
244 if (obj
->u
.s
.owner
== owner
)
245 (void) lttng_ust_objd_unref(i
);
250 * This is LTTng's own personal way to create an ABI for sessiond.
251 * We send commands over a socket.
254 static const struct lttng_ust_objd_ops lttng_ops
;
255 static const struct lttng_ust_objd_ops lttng_session_ops
;
256 static const struct lttng_ust_objd_ops lttng_channel_ops
;
257 static const struct lttng_ust_objd_ops lttng_enabler_ops
;
258 static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops
;
259 static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops
;
261 int lttng_abi_create_root_handle(void)
265 /* root handles have NULL owners */
266 root_handle
= objd_alloc(NULL
, <tng_ops
, NULL
, "root");
271 int lttng_is_channel_ready(struct lttng_channel
*lttng_chan
)
273 struct channel
*chan
;
274 unsigned int nr_streams
, exp_streams
;
276 chan
= lttng_chan
->chan
;
277 nr_streams
= channel_handle_get_nr_streams(lttng_chan
->handle
);
278 exp_streams
= chan
->nr_streams
;
279 return nr_streams
== exp_streams
;
283 int lttng_abi_create_session(void *owner
)
285 struct lttng_session
*session
;
286 int session_objd
, ret
;
288 session
= lttng_session_create();
291 session_objd
= objd_alloc(session
, <tng_session_ops
, owner
, "session");
292 if (session_objd
< 0) {
296 session
->objd
= session_objd
;
300 lttng_session_destroy(session
);
305 long lttng_abi_tracer_version(int objd
,
306 struct lttng_ust_tracer_version
*v
)
308 v
->major
= LTTNG_UST_INTERNAL_MAJOR_VERSION
;
309 v
->minor
= LTTNG_UST_INTERNAL_MINOR_VERSION
;
310 v
->patchlevel
= LTTNG_UST_INTERNAL_PATCHLEVEL_VERSION
;
315 long lttng_abi_add_context(int objd
,
316 struct lttng_ust_context
*context_param
,
317 struct lttng_ctx
**ctx
, struct lttng_session
*session
)
319 return lttng_attach_context(context_param
, ctx
, session
);
323 * lttng_cmd - lttng control through socket commands
325 * @objd: the object descriptor
328 * @uargs: UST arguments (internal)
331 * This descriptor implements lttng commands:
333 * Returns a LTTng trace session object descriptor
334 * LTTNG_UST_TRACER_VERSION
335 * Returns the LTTng kernel tracer version
336 * LTTNG_UST_TRACEPOINT_LIST
337 * Returns a file descriptor listing available tracepoints
338 * LTTNG_UST_TRACEPOINT_FIELD_LIST
339 * Returns a file descriptor listing available tracepoint fields
340 * LTTNG_UST_WAIT_QUIESCENT
341 * Returns after all previously running probes have completed
343 * The returned session will be deleted when its file descriptor is closed.
346 long lttng_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
347 union ust_args
*uargs
, void *owner
)
350 case LTTNG_UST_SESSION
:
351 return lttng_abi_create_session(owner
);
352 case LTTNG_UST_TRACER_VERSION
:
353 return lttng_abi_tracer_version(objd
,
354 (struct lttng_ust_tracer_version
*) arg
);
355 case LTTNG_UST_TRACEPOINT_LIST
:
356 return lttng_abi_tracepoint_list(owner
);
357 case LTTNG_UST_TRACEPOINT_FIELD_LIST
:
358 return lttng_abi_tracepoint_field_list(owner
);
359 case LTTNG_UST_WAIT_QUIESCENT
:
367 static const struct lttng_ust_objd_ops lttng_ops
= {
372 * We tolerate no failure in this function (if one happens, we print a dmesg
373 * error, but cannot return any error, because the channel information is
377 void lttng_metadata_create_events(int channel_objd
)
379 struct lttng_channel
*chan
= objd_private(channel_objd
);
380 struct lttng_enabler
*enabler
;
381 static struct lttng_ust_event metadata_params
= {
382 .instrumentation
= LTTNG_UST_TRACEPOINT
,
383 .name
= "lttng_ust:metadata",
384 .loglevel_type
= LTTNG_UST_LOGLEVEL_ALL
,
385 .loglevel
= TRACE_DEFAULT
,
389 * We tolerate no failure path after event creation. It will stay
390 * invariant for the rest of the session.
392 enabler
= lttng_enabler_create(LTTNG_ENABLER_EVENT
,
393 &metadata_params
, chan
);
401 return; /* not allowed to return error */
404 int lttng_abi_map_channel(int session_objd
,
405 struct lttng_ust_channel
*ust_chan
,
406 union ust_args
*uargs
,
409 struct lttng_session
*session
= objd_private(session_objd
);
410 const char *transport_name
;
411 const struct lttng_transport
*transport
;
412 const char *chan_name
;
414 struct lttng_ust_shm_handle
*channel_handle
;
415 struct lttng_channel
*lttng_chan
;
416 struct channel
*chan
;
417 struct lttng_ust_lib_ring_buffer_config
*config
;
421 enum lttng_ust_chan_type type
;
423 chan_data
= uargs
->channel
.chan_data
;
425 type
= ust_chan
->type
;
428 case LTTNG_UST_CHAN_PER_CPU
:
429 case LTTNG_UST_CHAN_METADATA
:
435 if (session
->been_active
) {
437 goto active
; /* Refuse to add channel to active session */
440 channel_handle
= channel_handle_create(chan_data
, len
);
441 if (!channel_handle
) {
446 chan
= shmp(channel_handle
, channel_handle
->chan
);
448 config
= &chan
->backend
.config
;
449 lttng_chan
= channel_get_private(chan
);
455 /* Lookup transport name */
457 case LTTNG_UST_CHAN_PER_CPU
:
458 if (config
->output
== RING_BUFFER_MMAP
) {
459 transport_name
= config
->mode
== RING_BUFFER_OVERWRITE
?
460 "relay-overwrite-mmap" : "relay-discard-mmap";
465 chan_name
= "channel";
467 case LTTNG_UST_CHAN_METADATA
:
468 if (config
->output
== RING_BUFFER_MMAP
) {
469 transport_name
= "relay-metadata-mmap";
474 chan_name
= "metadata";
477 transport_name
= "<unknown>";
478 chan_name
= "<unknown>";
482 transport
= lttng_transport_find(transport_name
);
484 DBG("LTTng transport %s not found\n",
490 chan_objd
= objd_alloc(NULL
, <tng_channel_ops
, owner
, chan_name
);
496 /* Initialize our lttng chan */
497 lttng_chan
->chan
= chan
;
498 lttng_chan
->enabled
= 1;
499 lttng_chan
->ctx
= NULL
;
500 lttng_chan
->session
= session
;
501 lttng_chan
->free_event_id
= 0;
502 lttng_chan
->used_event_id
= 0;
503 lttng_chan
->ops
= &transport
->ops
;
504 memcpy(<tng_chan
->chan
->backend
.config
,
505 transport
->client_config
,
506 sizeof(lttng_chan
->chan
->backend
.config
));
507 cds_list_add(<tng_chan
->node
, &session
->chan_head
);
508 lttng_chan
->header_type
= 0;
509 lttng_chan
->handle
= channel_handle
;
510 lttng_chan
->metadata_dumped
= 0;
511 lttng_chan
->id
= session
->free_chan_id
++;
512 lttng_chan
->type
= type
;
515 * We tolerate no failure path after channel creation. It will stay
516 * invariant for the rest of the session.
518 objd_set_private(chan_objd
, lttng_chan
);
519 lttng_chan
->objd
= chan_objd
;
520 /* The channel created holds a reference on the session */
521 objd_ref(session_objd
);
528 channel_destroy(chan
, channel_handle
, 0);
535 * lttng_session_cmd - lttng session object command
540 * @uargs: UST arguments (internal)
543 * This descriptor implements lttng commands:
545 * Returns a LTTng channel object descriptor
547 * Enables tracing for a session (weak enable)
549 * Disables tracing for a session (strong disable)
551 * Returns a LTTng metadata object descriptor
553 * The returned channel will be deleted when its file descriptor is closed.
556 long lttng_session_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
557 union ust_args
*uargs
, void *owner
)
559 struct lttng_session
*session
= objd_private(objd
);
562 case LTTNG_UST_CHANNEL
:
563 return lttng_abi_map_channel(objd
,
564 (struct lttng_ust_channel
*) arg
,
566 case LTTNG_UST_SESSION_START
:
567 case LTTNG_UST_ENABLE
:
568 return lttng_session_enable(session
);
569 case LTTNG_UST_SESSION_STOP
:
570 case LTTNG_UST_DISABLE
:
571 return lttng_session_disable(session
);
578 * Called when the last file reference is dropped.
580 * Big fat note: channels and events are invariant for the whole session after
581 * their creation. So this session destruction also destroys all channel and
582 * event structures specific to this session (they are not destroyed when their
583 * individual file is released).
586 int lttng_release_session(int objd
)
588 struct lttng_session
*session
= objd_private(objd
);
591 lttng_session_destroy(session
);
598 static const struct lttng_ust_objd_ops lttng_session_ops
= {
599 .release
= lttng_release_session
,
600 .cmd
= lttng_session_cmd
,
604 long lttng_tracepoint_list_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
605 union ust_args
*uargs
, void *owner
)
607 struct lttng_ust_tracepoint_list
*list
= objd_private(objd
);
608 struct lttng_ust_tracepoint_iter
*tp
=
609 (struct lttng_ust_tracepoint_iter
*) arg
;
610 struct lttng_ust_tracepoint_iter
*iter
;
613 case LTTNG_UST_TRACEPOINT_LIST_GET
:
616 iter
= lttng_ust_tracepoint_list_get_iter_next(list
);
618 return -LTTNG_UST_ERR_NOENT
;
619 if (!strcmp(iter
->name
, "lttng_ust:metadata"))
621 memcpy(tp
, iter
, sizeof(*tp
));
630 int lttng_abi_tracepoint_list(void *owner
)
633 struct lttng_ust_tracepoint_list
*list
;
635 list_objd
= objd_alloc(NULL
, <tng_tracepoint_list_ops
, owner
, "tp_list");
640 list
= zmalloc(sizeof(*list
));
645 objd_set_private(list_objd
, list
);
647 /* populate list by walking on all registered probes. */
648 ret
= lttng_probes_get_event_list(list
);
660 err
= lttng_ust_objd_unref(list_objd
);
668 int lttng_release_tracepoint_list(int objd
)
670 struct lttng_ust_tracepoint_list
*list
= objd_private(objd
);
673 lttng_probes_prune_event_list(list
);
681 static const struct lttng_ust_objd_ops lttng_tracepoint_list_ops
= {
682 .release
= lttng_release_tracepoint_list
,
683 .cmd
= lttng_tracepoint_list_cmd
,
687 long lttng_tracepoint_field_list_cmd(int objd
, unsigned int cmd
,
688 unsigned long arg
, union ust_args
*uargs
, void *owner
)
690 struct lttng_ust_field_list
*list
= objd_private(objd
);
691 struct lttng_ust_field_iter
*tp
= &uargs
->field_list
.entry
;
692 struct lttng_ust_field_iter
*iter
;
695 case LTTNG_UST_TRACEPOINT_FIELD_LIST_GET
:
698 iter
= lttng_ust_field_list_get_iter_next(list
);
700 return -LTTNG_UST_ERR_NOENT
;
701 if (!strcmp(iter
->event_name
, "lttng_ust:metadata"))
703 memcpy(tp
, iter
, sizeof(*tp
));
712 int lttng_abi_tracepoint_field_list(void *owner
)
715 struct lttng_ust_field_list
*list
;
717 list_objd
= objd_alloc(NULL
, <tng_tracepoint_field_list_ops
, owner
,
723 list
= zmalloc(sizeof(*list
));
728 objd_set_private(list_objd
, list
);
730 /* populate list by walking on all registered probes. */
731 ret
= lttng_probes_get_field_list(list
);
743 err
= lttng_ust_objd_unref(list_objd
);
751 int lttng_release_tracepoint_field_list(int objd
)
753 struct lttng_ust_field_list
*list
= objd_private(objd
);
756 lttng_probes_prune_field_list(list
);
764 static const struct lttng_ust_objd_ops lttng_tracepoint_field_list_ops
= {
765 .release
= lttng_release_tracepoint_field_list
,
766 .cmd
= lttng_tracepoint_field_list_cmd
,
770 int lttng_abi_map_stream(int channel_objd
, struct lttng_ust_stream
*info
,
771 union ust_args
*uargs
, void *owner
)
773 struct lttng_channel
*channel
= objd_private(channel_objd
);
776 ret
= channel_handle_add_stream(channel
->handle
,
777 uargs
->stream
.shm_fd
, uargs
->stream
.wakeup_fd
,
778 info
->stream_nr
, info
->len
);
780 goto error_add_stream
;
789 int lttng_abi_create_enabler(int channel_objd
,
790 struct lttng_ust_event
*event_param
,
792 enum lttng_enabler_type type
)
794 struct lttng_channel
*channel
= objd_private(channel_objd
);
795 struct lttng_enabler
*enabler
;
798 event_param
->name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
799 event_objd
= objd_alloc(NULL
, <tng_enabler_ops
, owner
, "enabler");
800 if (event_objd
< 0) {
805 * We tolerate no failure path after event creation. It will stay
806 * invariant for the rest of the session.
808 enabler
= lttng_enabler_create(type
, event_param
, channel
);
813 objd_set_private(event_objd
, enabler
);
814 /* The event holds a reference on the channel */
815 objd_ref(channel_objd
);
822 err
= lttng_ust_objd_unref(event_objd
);
830 long lttng_metadata_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
831 union ust_args
*uargs
, void *owner
)
833 struct lttng_channel
*channel
= objd_private(objd
);
834 struct lttng_session
*session
= channel
->session
;
837 case LTTNG_UST_STREAM
:
839 struct lttng_ust_stream
*stream
;
842 stream
= (struct lttng_ust_stream
*) arg
;
843 /* stream used as output */
844 ret
= lttng_abi_map_stream(objd
, stream
, uargs
, owner
);
846 session
->metadata
= channel
;
847 lttng_metadata_create_events(objd
);
851 case LTTNG_UST_FLUSH_BUFFER
:
853 if (!session
->metadata
) {
856 return channel
->ops
->flush_buffer(channel
->chan
, channel
->handle
);
864 * lttng_channel_cmd - lttng control through object descriptors
866 * @objd: the object descriptor
869 * @uargs: UST arguments (internal)
872 * This object descriptor implements lttng commands:
874 * Returns an event stream object descriptor or failure.
875 * (typically, one event stream records events from one CPU)
877 * Returns an event object descriptor or failure.
879 * Prepend a context field to each event in the channel
881 * Enable recording for events in this channel (weak enable)
883 * Disable recording for events in this channel (strong disable)
885 * Channel and event file descriptors also hold a reference on the session.
888 long lttng_channel_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
889 union ust_args
*uargs
, void *owner
)
891 struct lttng_channel
*channel
= objd_private(objd
);
893 if (cmd
!= LTTNG_UST_STREAM
) {
895 * Check if channel received all streams.
897 if (!lttng_is_channel_ready(channel
))
901 if (channel
->type
== LTTNG_UST_CHAN_METADATA
) {
902 return lttng_metadata_cmd(objd
, cmd
, arg
, uargs
, owner
);
906 case LTTNG_UST_STREAM
:
908 struct lttng_ust_stream
*stream
;
910 stream
= (struct lttng_ust_stream
*) arg
;
911 /* stream used as output */
912 return lttng_abi_map_stream(objd
, stream
, uargs
, owner
);
914 case LTTNG_UST_EVENT
:
916 struct lttng_ust_event
*event_param
=
917 (struct lttng_ust_event
*) arg
;
918 if (event_param
->name
[strlen(event_param
->name
) - 1] == '*') {
919 /* If ends with wildcard, create wildcard. */
920 return lttng_abi_create_enabler(objd
, event_param
,
921 owner
, LTTNG_ENABLER_WILDCARD
);
923 return lttng_abi_create_enabler(objd
, event_param
,
924 owner
, LTTNG_ENABLER_EVENT
);
927 case LTTNG_UST_CONTEXT
:
928 return lttng_abi_add_context(objd
,
929 (struct lttng_ust_context
*) arg
,
930 &channel
->ctx
, channel
->session
);
931 case LTTNG_UST_ENABLE
:
932 return lttng_channel_enable(channel
);
933 case LTTNG_UST_DISABLE
:
934 return lttng_channel_disable(channel
);
935 case LTTNG_UST_FLUSH_BUFFER
:
936 return channel
->ops
->flush_buffer(channel
->chan
, channel
->handle
);
943 int lttng_channel_release(int objd
)
945 struct lttng_channel
*channel
= objd_private(objd
);
948 return lttng_ust_objd_unref(channel
->session
->objd
);
952 static const struct lttng_ust_objd_ops lttng_channel_ops
= {
953 .release
= lttng_channel_release
,
954 .cmd
= lttng_channel_cmd
,
958 * lttng_enabler_cmd - lttng control through object descriptors
960 * @objd: the object descriptor
963 * @uargs: UST arguments (internal)
966 * This object descriptor implements lttng commands:
968 * Prepend a context field to each record of events of this
971 * Enable recording for this enabler
973 * Disable recording for this enabler
975 * Attach a filter to an enabler.
978 long lttng_enabler_cmd(int objd
, unsigned int cmd
, unsigned long arg
,
979 union ust_args
*uargs
, void *owner
)
981 struct lttng_enabler
*enabler
= objd_private(objd
);
984 case LTTNG_UST_CONTEXT
:
985 return lttng_enabler_attach_context(enabler
,
986 (struct lttng_ust_context
*) arg
);
987 case LTTNG_UST_ENABLE
:
988 return lttng_enabler_enable(enabler
);
989 case LTTNG_UST_DISABLE
:
990 return lttng_enabler_disable(enabler
);
991 case LTTNG_UST_FILTER
:
995 ret
= lttng_enabler_attach_bytecode(enabler
,
996 (struct lttng_ust_filter_bytecode_node
*) arg
);
1007 int lttng_enabler_release(int objd
)
1009 struct lttng_enabler
*enabler
= objd_private(objd
);
1012 return lttng_ust_objd_unref(enabler
->chan
->objd
);
1016 static const struct lttng_ust_objd_ops lttng_enabler_ops
= {
1017 .release
= lttng_enabler_release
,
1018 .cmd
= lttng_enabler_cmd
,
1021 void lttng_ust_abi_exit(void)
1023 lttng_ust_abi_close_in_progress
= 1;
1024 objd_table_destroy();
1025 lttng_ust_abi_close_in_progress
= 0;