2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@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 as published by
7 * the Free Software Foundation; version 2 of the License only.
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 <lttng/ust-config.h>
27 #include <lttng/ust-ctl.h>
28 #include <lttng/ust-abi.h>
29 #include <lttng/ust-events.h>
30 #include <usterr-signal-safe.h>
34 #include "../libringbuffer/backend.h"
35 #include "../libringbuffer/frontend.h"
36 #include "../liblttng-ust/wait.h"
37 #include "../liblttng-ust/lttng-rb-clients.h"
38 #include "../liblttng-ust/clock.h"
39 #include "../liblttng-ust/getenv.h"
41 #include "../libcounter/shm.h"
42 #include "../libcounter/smp.h"
43 #include "../libcounter/counter.h"
46 * Number of milliseconds to retry before failing metadata writes on
47 * buffer full condition. (10 seconds)
49 #define LTTNG_METADATA_TIMEOUT_MSEC 10000
52 * Channel representation within consumer.
54 struct ustctl_consumer_channel
{
55 struct lttng_channel
*chan
; /* lttng channel buffers */
57 /* initial attributes */
58 struct ustctl_consumer_channel_attr attr
;
59 int wait_fd
; /* monitor close() */
60 int wakeup_fd
; /* monitor close() */
64 * Stream representation within consumer.
66 struct ustctl_consumer_stream
{
67 struct lttng_ust_shm_handle
*handle
; /* shared-memory handle */
68 struct lttng_ust_lib_ring_buffer
*buf
;
69 struct ustctl_consumer_channel
*chan
;
70 int shm_fd
, wait_fd
, wakeup_fd
;
72 uint64_t memory_map_size
;
75 #define USTCTL_COUNTER_ATTR_DIMENSION_MAX 8
76 struct ustctl_counter_attr
{
77 enum ustctl_counter_arithmetic arithmetic
;
78 enum ustctl_counter_bitness bitness
;
79 uint32_t nr_dimensions
;
80 int64_t global_sum_step
;
81 struct ustctl_counter_dimension dimensions
[USTCTL_COUNTER_ATTR_DIMENSION_MAX
];
85 * Counter representation within daemon.
87 struct ustctl_daemon_counter
{
88 struct lib_counter
*counter
;
89 const struct lttng_counter_ops
*ops
;
90 struct ustctl_counter_attr
*attr
; /* initial attributes */
93 extern void lttng_ring_buffer_client_overwrite_init(void);
94 extern void lttng_ring_buffer_client_overwrite_rt_init(void);
95 extern void lttng_ring_buffer_client_discard_init(void);
96 extern void lttng_ring_buffer_client_discard_rt_init(void);
97 extern void lttng_ring_buffer_metadata_client_init(void);
98 extern void lttng_ring_buffer_client_overwrite_exit(void);
99 extern void lttng_ring_buffer_client_overwrite_rt_exit(void);
100 extern void lttng_ring_buffer_client_discard_exit(void);
101 extern void lttng_ring_buffer_client_discard_rt_exit(void);
102 extern void lttng_ring_buffer_metadata_client_exit(void);
103 extern void lttng_counter_client_percpu_32_overflow_init(void);
104 extern void lttng_counter_client_percpu_32_overflow_exit(void);
105 extern void lttng_counter_client_percpu_64_overflow_init(void);
106 extern void lttng_counter_client_percpu_64_overflow_exit(void);
108 int ustctl_release_handle(int sock
, int handle
)
110 struct ustcomm_ust_msg lum
;
111 struct ustcomm_ust_reply lur
;
113 if (sock
< 0 || handle
< 0)
115 memset(&lum
, 0, sizeof(lum
));
117 lum
.cmd
= LTTNG_UST_RELEASE
;
118 return ustcomm_send_app_cmd(sock
, &lum
, &lur
);
122 * If sock is negative, it means we don't have to notify the other side
123 * (e.g. application has already vanished).
125 int ustctl_release_object(int sock
, struct lttng_ust_object_data
*data
)
132 switch (data
->type
) {
133 case LTTNG_UST_OBJECT_TYPE_CHANNEL
:
134 if (data
->u
.channel
.wakeup_fd
>= 0) {
135 ret
= close(data
->u
.channel
.wakeup_fd
);
140 data
->u
.channel
.wakeup_fd
= -1;
142 free(data
->u
.channel
.data
);
143 data
->u
.channel
.data
= NULL
;
145 case LTTNG_UST_OBJECT_TYPE_STREAM
:
146 if (data
->u
.stream
.shm_fd
>= 0) {
147 ret
= close(data
->u
.stream
.shm_fd
);
152 data
->u
.stream
.shm_fd
= -1;
154 if (data
->u
.stream
.wakeup_fd
>= 0) {
155 ret
= close(data
->u
.stream
.wakeup_fd
);
160 data
->u
.stream
.wakeup_fd
= -1;
163 case LTTNG_UST_OBJECT_TYPE_EVENT
:
164 case LTTNG_UST_OBJECT_TYPE_CONTEXT
:
165 case LTTNG_UST_OBJECT_TYPE_TRIGGER_GROUP
:
166 case LTTNG_UST_OBJECT_TYPE_TRIGGER
:
168 case LTTNG_UST_OBJECT_TYPE_COUNTER
:
169 free(data
->u
.counter
.data
);
170 data
->u
.counter
.data
= NULL
;
172 case LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL
:
173 if (data
->u
.counter_global
.shm_fd
>= 0) {
174 ret
= close(data
->u
.counter_global
.shm_fd
);
179 data
->u
.counter_global
.shm_fd
= -1;
182 case LTTNG_UST_OBJECT_TYPE_COUNTER_CPU
:
183 if (data
->u
.counter_cpu
.shm_fd
>= 0) {
184 ret
= close(data
->u
.counter_cpu
.shm_fd
);
189 data
->u
.counter_cpu
.shm_fd
= -1;
195 return ustctl_release_handle(sock
, data
->handle
);
199 * Send registration done packet to the application.
201 int ustctl_register_done(int sock
)
203 struct ustcomm_ust_msg lum
;
204 struct ustcomm_ust_reply lur
;
207 DBG("Sending register done command to %d", sock
);
208 memset(&lum
, 0, sizeof(lum
));
209 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
210 lum
.cmd
= LTTNG_UST_REGISTER_DONE
;
211 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
218 * returns session handle.
220 int ustctl_create_session(int sock
)
222 struct ustcomm_ust_msg lum
;
223 struct ustcomm_ust_reply lur
;
224 int ret
, session_handle
;
227 memset(&lum
, 0, sizeof(lum
));
228 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
229 lum
.cmd
= LTTNG_UST_SESSION
;
230 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
233 session_handle
= lur
.ret_val
;
234 DBG("received session handle %u", session_handle
);
235 return session_handle
;
238 int ustctl_create_event(int sock
, struct lttng_ust_event
*ev
,
239 struct lttng_ust_object_data
*channel_data
,
240 struct lttng_ust_object_data
**_event_data
)
242 struct ustcomm_ust_msg lum
;
243 struct ustcomm_ust_reply lur
;
244 struct lttng_ust_object_data
*event_data
;
247 if (!channel_data
|| !_event_data
)
250 event_data
= zmalloc(sizeof(*event_data
));
253 event_data
->type
= LTTNG_UST_OBJECT_TYPE_EVENT
;
254 memset(&lum
, 0, sizeof(lum
));
255 lum
.handle
= channel_data
->handle
;
256 lum
.cmd
= LTTNG_UST_EVENT
;
257 strncpy(lum
.u
.event
.name
, ev
->name
,
258 LTTNG_UST_SYM_NAME_LEN
);
259 lum
.u
.event
.instrumentation
= ev
->instrumentation
;
260 lum
.u
.event
.loglevel_type
= ev
->loglevel_type
;
261 lum
.u
.event
.loglevel
= ev
->loglevel
;
262 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
267 event_data
->handle
= lur
.ret_val
;
268 DBG("received event handle %u", event_data
->handle
);
269 *_event_data
= event_data
;
273 int ustctl_add_context(int sock
, struct lttng_ust_context_attr
*ctx
,
274 struct lttng_ust_object_data
*obj_data
,
275 struct lttng_ust_object_data
**_context_data
)
277 struct ustcomm_ust_msg lum
;
278 struct ustcomm_ust_reply lur
;
279 struct lttng_ust_object_data
*context_data
= NULL
;
284 if (!obj_data
|| !_context_data
) {
289 context_data
= zmalloc(sizeof(*context_data
));
294 context_data
->type
= LTTNG_UST_OBJECT_TYPE_CONTEXT
;
295 memset(&lum
, 0, sizeof(lum
));
296 lum
.handle
= obj_data
->handle
;
297 lum
.cmd
= LTTNG_UST_CONTEXT
;
299 lum
.u
.context
.ctx
= ctx
->ctx
;
301 case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER
:
302 lum
.u
.context
.u
.perf_counter
= ctx
->u
.perf_counter
;
304 case LTTNG_UST_CONTEXT_APP_CONTEXT
:
306 size_t provider_name_len
= strlen(
307 ctx
->u
.app_ctx
.provider_name
) + 1;
308 size_t ctx_name_len
= strlen(ctx
->u
.app_ctx
.ctx_name
) + 1;
310 lum
.u
.context
.u
.app_ctx
.provider_name_len
= provider_name_len
;
311 lum
.u
.context
.u
.app_ctx
.ctx_name_len
= ctx_name_len
;
313 len
= provider_name_len
+ ctx_name_len
;
319 memcpy(buf
, ctx
->u
.app_ctx
.provider_name
,
321 memcpy(buf
+ provider_name_len
, ctx
->u
.app_ctx
.ctx_name
,
328 ret
= ustcomm_send_app_msg(sock
, &lum
);
332 /* send var len ctx_name */
333 ret
= ustcomm_send_unix_sock(sock
, buf
, len
);
342 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
346 context_data
->handle
= -1;
347 DBG("Context created successfully");
348 *_context_data
= context_data
;
356 int ustctl_set_filter(int sock
, struct lttng_ust_filter_bytecode
*bytecode
,
357 struct lttng_ust_object_data
*obj_data
)
359 struct ustcomm_ust_msg lum
;
360 struct ustcomm_ust_reply lur
;
366 memset(&lum
, 0, sizeof(lum
));
367 lum
.handle
= obj_data
->handle
;
368 lum
.cmd
= LTTNG_UST_FILTER
;
369 lum
.u
.filter
.data_size
= bytecode
->len
;
370 lum
.u
.filter
.reloc_offset
= bytecode
->reloc_offset
;
371 lum
.u
.filter
.seqnum
= bytecode
->seqnum
;
373 ret
= ustcomm_send_app_msg(sock
, &lum
);
376 /* send var len bytecode */
377 ret
= ustcomm_send_unix_sock(sock
, bytecode
->data
,
382 if (ret
!= bytecode
->len
)
384 return ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
387 int ustctl_set_capture(int sock
, struct lttng_ust_capture_bytecode
*bytecode
,
388 struct lttng_ust_object_data
*obj_data
)
390 struct ustcomm_ust_msg lum
;
391 struct ustcomm_ust_reply lur
;
397 memset(&lum
, 0, sizeof(lum
));
398 lum
.handle
= obj_data
->handle
;
399 lum
.cmd
= LTTNG_UST_CAPTURE
;
400 lum
.u
.capture
.data_size
= bytecode
->len
;
401 lum
.u
.capture
.reloc_offset
= bytecode
->reloc_offset
;
402 lum
.u
.capture
.seqnum
= bytecode
->seqnum
;
404 ret
= ustcomm_send_app_msg(sock
, &lum
);
407 /* send var len bytecode */
408 ret
= ustcomm_send_unix_sock(sock
, bytecode
->data
,
413 if (ret
!= bytecode
->len
)
415 return ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
418 int ustctl_set_exclusion(int sock
, struct lttng_ust_event_exclusion
*exclusion
,
419 struct lttng_ust_object_data
*obj_data
)
421 struct ustcomm_ust_msg lum
;
422 struct ustcomm_ust_reply lur
;
429 memset(&lum
, 0, sizeof(lum
));
430 lum
.handle
= obj_data
->handle
;
431 lum
.cmd
= LTTNG_UST_EXCLUSION
;
432 lum
.u
.exclusion
.count
= exclusion
->count
;
434 ret
= ustcomm_send_app_msg(sock
, &lum
);
439 /* send var len exclusion names */
440 ret
= ustcomm_send_unix_sock(sock
,
442 exclusion
->count
* LTTNG_UST_SYM_NAME_LEN
);
446 if (ret
!= exclusion
->count
* LTTNG_UST_SYM_NAME_LEN
) {
449 return ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
452 /* Enable event, channel and session ioctl */
453 int ustctl_enable(int sock
, struct lttng_ust_object_data
*object
)
455 struct ustcomm_ust_msg lum
;
456 struct ustcomm_ust_reply lur
;
462 memset(&lum
, 0, sizeof(lum
));
463 lum
.handle
= object
->handle
;
464 lum
.cmd
= LTTNG_UST_ENABLE
;
465 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
468 DBG("enabled handle %u", object
->handle
);
472 /* Disable event, channel and session ioctl */
473 int ustctl_disable(int sock
, struct lttng_ust_object_data
*object
)
475 struct ustcomm_ust_msg lum
;
476 struct ustcomm_ust_reply lur
;
482 memset(&lum
, 0, sizeof(lum
));
483 lum
.handle
= object
->handle
;
484 lum
.cmd
= LTTNG_UST_DISABLE
;
485 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
488 DBG("disable handle %u", object
->handle
);
492 int ustctl_start_session(int sock
, int handle
)
494 struct lttng_ust_object_data obj
;
497 return ustctl_enable(sock
, &obj
);
500 int ustctl_stop_session(int sock
, int handle
)
502 struct lttng_ust_object_data obj
;
505 return ustctl_disable(sock
, &obj
);
508 int ustctl_create_trigger_group(int sock
, int pipe_fd
,
509 struct lttng_ust_object_data
**_trigger_group_data
)
511 struct lttng_ust_object_data
*trigger_group_data
;
512 struct ustcomm_ust_msg lum
;
513 struct ustcomm_ust_reply lur
;
517 if (!_trigger_group_data
)
520 trigger_group_data
= zmalloc(sizeof(*trigger_group_data
));
521 if (!trigger_group_data
)
524 trigger_group_data
->type
= LTTNG_UST_OBJECT_TYPE_TRIGGER_GROUP
;
526 memset(&lum
, 0, sizeof(lum
));
527 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
528 lum
.cmd
= LTTNG_UST_TRIGGER_GROUP_CREATE
;
530 ret
= ustcomm_send_app_msg(sock
, &lum
);
534 /* Send trigger notification pipe. */
535 len
= ustcomm_send_fds_unix_sock(sock
, &pipe_fd
, 1);
541 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
545 trigger_group_data
->handle
= lur
.ret_val
;
546 DBG("received trigger group handle %d", trigger_group_data
->handle
);
548 *_trigger_group_data
= trigger_group_data
;
553 free(trigger_group_data
);
559 int ustctl_create_trigger(int sock
, struct lttng_ust_trigger
*trigger
,
560 struct lttng_ust_object_data
*trigger_group
,
561 struct lttng_ust_object_data
**_trigger_data
)
563 struct ustcomm_ust_msg lum
;
564 struct ustcomm_ust_reply lur
;
565 struct lttng_ust_object_data
*trigger_data
;
568 if (!trigger_group
|| !_trigger_data
)
571 trigger_data
= zmalloc(sizeof(*trigger_data
));
575 trigger_data
->type
= LTTNG_UST_OBJECT_TYPE_TRIGGER
;
577 memset(&lum
, 0, sizeof(lum
));
578 lum
.handle
= trigger_group
->handle
;
579 lum
.cmd
= LTTNG_UST_TRIGGER_CREATE
;
581 strncpy(lum
.u
.trigger
.name
, trigger
->name
,
582 LTTNG_UST_SYM_NAME_LEN
);
583 lum
.u
.trigger
.instrumentation
= trigger
->instrumentation
;
584 lum
.u
.trigger
.loglevel_type
= trigger
->loglevel_type
;
585 lum
.u
.trigger
.loglevel
= trigger
->loglevel
;
586 lum
.u
.trigger
.id
= trigger
->id
;
587 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
592 trigger_data
->handle
= lur
.ret_val
;
593 DBG("received trigger handle %u", trigger_data
->handle
);
594 *_trigger_data
= trigger_data
;
599 int ustctl_tracepoint_list(int sock
)
601 struct ustcomm_ust_msg lum
;
602 struct ustcomm_ust_reply lur
;
603 int ret
, tp_list_handle
;
605 memset(&lum
, 0, sizeof(lum
));
606 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
607 lum
.cmd
= LTTNG_UST_TRACEPOINT_LIST
;
608 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
611 tp_list_handle
= lur
.ret_val
;
612 DBG("received tracepoint list handle %u", tp_list_handle
);
613 return tp_list_handle
;
616 int ustctl_tracepoint_list_get(int sock
, int tp_list_handle
,
617 struct lttng_ust_tracepoint_iter
*iter
)
619 struct ustcomm_ust_msg lum
;
620 struct ustcomm_ust_reply lur
;
626 memset(&lum
, 0, sizeof(lum
));
627 lum
.handle
= tp_list_handle
;
628 lum
.cmd
= LTTNG_UST_TRACEPOINT_LIST_GET
;
629 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
632 DBG("received tracepoint list entry name %s loglevel %d",
633 lur
.u
.tracepoint
.name
,
634 lur
.u
.tracepoint
.loglevel
);
635 memcpy(iter
, &lur
.u
.tracepoint
, sizeof(*iter
));
639 int ustctl_tracepoint_field_list(int sock
)
641 struct ustcomm_ust_msg lum
;
642 struct ustcomm_ust_reply lur
;
643 int ret
, tp_field_list_handle
;
645 memset(&lum
, 0, sizeof(lum
));
646 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
647 lum
.cmd
= LTTNG_UST_TRACEPOINT_FIELD_LIST
;
648 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
651 tp_field_list_handle
= lur
.ret_val
;
652 DBG("received tracepoint field list handle %u", tp_field_list_handle
);
653 return tp_field_list_handle
;
656 int ustctl_tracepoint_field_list_get(int sock
, int tp_field_list_handle
,
657 struct lttng_ust_field_iter
*iter
)
659 struct ustcomm_ust_msg lum
;
660 struct ustcomm_ust_reply lur
;
667 memset(&lum
, 0, sizeof(lum
));
668 lum
.handle
= tp_field_list_handle
;
669 lum
.cmd
= LTTNG_UST_TRACEPOINT_FIELD_LIST_GET
;
670 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
673 len
= ustcomm_recv_unix_sock(sock
, iter
, sizeof(*iter
));
674 if (len
!= sizeof(*iter
)) {
677 DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d",
685 int ustctl_tracer_version(int sock
, struct lttng_ust_tracer_version
*v
)
687 struct ustcomm_ust_msg lum
;
688 struct ustcomm_ust_reply lur
;
694 memset(&lum
, 0, sizeof(lum
));
695 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
696 lum
.cmd
= LTTNG_UST_TRACER_VERSION
;
697 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
700 memcpy(v
, &lur
.u
.version
, sizeof(*v
));
701 DBG("received tracer version");
705 int ustctl_wait_quiescent(int sock
)
707 struct ustcomm_ust_msg lum
;
708 struct ustcomm_ust_reply lur
;
711 memset(&lum
, 0, sizeof(lum
));
712 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
713 lum
.cmd
= LTTNG_UST_WAIT_QUIESCENT
;
714 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
717 DBG("waited for quiescent state");
721 int ustctl_calibrate(int sock
, struct lttng_ust_calibrate
*calibrate
)
729 int ustctl_sock_flush_buffer(int sock
, struct lttng_ust_object_data
*object
)
731 struct ustcomm_ust_msg lum
;
732 struct ustcomm_ust_reply lur
;
738 memset(&lum
, 0, sizeof(lum
));
739 lum
.handle
= object
->handle
;
740 lum
.cmd
= LTTNG_UST_FLUSH_BUFFER
;
741 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
744 DBG("flushed buffer handle %u", object
->handle
);
749 int ustctl_send_channel(int sock
,
750 enum lttng_ust_chan_type type
,
760 len
= ustcomm_send_unix_sock(sock
, &size
, sizeof(size
));
761 if (len
!= sizeof(size
)) {
768 /* Send channel type */
769 len
= ustcomm_send_unix_sock(sock
, &type
, sizeof(type
));
770 if (len
!= sizeof(type
)) {
778 /* Send channel data */
779 len
= ustcomm_send_unix_sock(sock
, data
, size
);
788 len
= ustcomm_send_fds_unix_sock(sock
, &wakeup_fd
, 1);
799 int ustctl_send_stream(int sock
,
801 uint64_t memory_map_size
,
802 int shm_fd
, int wakeup_fd
,
810 /* finish iteration */
813 len
= ustcomm_send_unix_sock(sock
, &v
, sizeof(v
));
814 if (len
!= sizeof(v
)) {
824 len
= ustcomm_send_unix_sock(sock
, &memory_map_size
,
825 sizeof(memory_map_size
));
826 if (len
!= sizeof(memory_map_size
)) {
834 len
= ustcomm_send_unix_sock(sock
, &stream_nr
,
836 if (len
!= sizeof(stream_nr
)) {
844 /* Send shm fd and wakeup fd */
847 len
= ustcomm_send_fds_unix_sock(sock
, fds
, 2);
857 int ustctl_recv_channel_from_consumer(int sock
,
858 struct lttng_ust_object_data
**_channel_data
)
860 struct lttng_ust_object_data
*channel_data
;
865 channel_data
= zmalloc(sizeof(*channel_data
));
870 channel_data
->type
= LTTNG_UST_OBJECT_TYPE_CHANNEL
;
871 channel_data
->handle
= -1;
874 len
= ustcomm_recv_unix_sock(sock
, &channel_data
->size
,
875 sizeof(channel_data
->size
));
876 if (len
!= sizeof(channel_data
->size
)) {
884 /* recv channel type */
885 len
= ustcomm_recv_unix_sock(sock
, &channel_data
->u
.channel
.type
,
886 sizeof(channel_data
->u
.channel
.type
));
887 if (len
!= sizeof(channel_data
->u
.channel
.type
)) {
895 /* recv channel data */
896 channel_data
->u
.channel
.data
= zmalloc(channel_data
->size
);
897 if (!channel_data
->u
.channel
.data
) {
901 len
= ustcomm_recv_unix_sock(sock
, channel_data
->u
.channel
.data
,
903 if (len
!= channel_data
->size
) {
908 goto error_recv_data
;
911 len
= ustcomm_recv_fds_unix_sock(sock
, &wakeup_fd
, 1);
915 goto error_recv_data
;
918 goto error_recv_data
;
921 channel_data
->u
.channel
.wakeup_fd
= wakeup_fd
;
922 *_channel_data
= channel_data
;
926 free(channel_data
->u
.channel
.data
);
933 int ustctl_recv_stream_from_consumer(int sock
,
934 struct lttng_ust_object_data
**_stream_data
)
936 struct lttng_ust_object_data
*stream_data
;
941 stream_data
= zmalloc(sizeof(*stream_data
));
947 stream_data
->type
= LTTNG_UST_OBJECT_TYPE_STREAM
;
948 stream_data
->handle
= -1;
951 len
= ustcomm_recv_unix_sock(sock
, &stream_data
->size
,
952 sizeof(stream_data
->size
));
953 if (len
!= sizeof(stream_data
->size
)) {
960 if (stream_data
->size
== -1) {
961 ret
= -LTTNG_UST_ERR_NOENT
;
966 len
= ustcomm_recv_unix_sock(sock
, &stream_data
->u
.stream
.stream_nr
,
967 sizeof(stream_data
->u
.stream
.stream_nr
));
968 if (len
!= sizeof(stream_data
->u
.stream
.stream_nr
)) {
976 /* recv shm fd and wakeup fd */
977 len
= ustcomm_recv_fds_unix_sock(sock
, fds
, 2);
987 stream_data
->u
.stream
.shm_fd
= fds
[0];
988 stream_data
->u
.stream
.wakeup_fd
= fds
[1];
989 *_stream_data
= stream_data
;
998 int ustctl_send_channel_to_ust(int sock
, int session_handle
,
999 struct lttng_ust_object_data
*channel_data
)
1001 struct ustcomm_ust_msg lum
;
1002 struct ustcomm_ust_reply lur
;
1008 memset(&lum
, 0, sizeof(lum
));
1009 lum
.handle
= session_handle
;
1010 lum
.cmd
= LTTNG_UST_CHANNEL
;
1011 lum
.u
.channel
.len
= channel_data
->size
;
1012 lum
.u
.channel
.type
= channel_data
->u
.channel
.type
;
1013 ret
= ustcomm_send_app_msg(sock
, &lum
);
1017 ret
= ustctl_send_channel(sock
,
1018 channel_data
->u
.channel
.type
,
1019 channel_data
->u
.channel
.data
,
1021 channel_data
->u
.channel
.wakeup_fd
,
1025 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
1027 channel_data
->handle
= lur
.ret_val
;
1032 int ustctl_send_stream_to_ust(int sock
,
1033 struct lttng_ust_object_data
*channel_data
,
1034 struct lttng_ust_object_data
*stream_data
)
1036 struct ustcomm_ust_msg lum
;
1037 struct ustcomm_ust_reply lur
;
1040 memset(&lum
, 0, sizeof(lum
));
1041 lum
.handle
= channel_data
->handle
;
1042 lum
.cmd
= LTTNG_UST_STREAM
;
1043 lum
.u
.stream
.len
= stream_data
->size
;
1044 lum
.u
.stream
.stream_nr
= stream_data
->u
.stream
.stream_nr
;
1045 ret
= ustcomm_send_app_msg(sock
, &lum
);
1049 assert(stream_data
);
1050 assert(stream_data
->type
== LTTNG_UST_OBJECT_TYPE_STREAM
);
1052 ret
= ustctl_send_stream(sock
,
1053 stream_data
->u
.stream
.stream_nr
,
1055 stream_data
->u
.stream
.shm_fd
,
1056 stream_data
->u
.stream
.wakeup_fd
, 1);
1059 return ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
1062 int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data
**dest
,
1063 struct lttng_ust_object_data
*src
)
1065 struct lttng_ust_object_data
*obj
;
1068 if (src
->handle
!= -1) {
1073 obj
= zmalloc(sizeof(*obj
));
1079 obj
->type
= src
->type
;
1080 obj
->handle
= src
->handle
;
1081 obj
->size
= src
->size
;
1083 switch (obj
->type
) {
1084 case LTTNG_UST_OBJECT_TYPE_CHANNEL
:
1086 obj
->u
.channel
.type
= src
->u
.channel
.type
;
1087 if (src
->u
.channel
.wakeup_fd
>= 0) {
1088 obj
->u
.channel
.wakeup_fd
=
1089 dup(src
->u
.channel
.wakeup_fd
);
1090 if (obj
->u
.channel
.wakeup_fd
< 0) {
1092 goto chan_error_wakeup_fd
;
1095 obj
->u
.channel
.wakeup_fd
=
1096 src
->u
.channel
.wakeup_fd
;
1098 obj
->u
.channel
.data
= zmalloc(obj
->size
);
1099 if (!obj
->u
.channel
.data
) {
1101 goto chan_error_alloc
;
1103 memcpy(obj
->u
.channel
.data
, src
->u
.channel
.data
, obj
->size
);
1107 if (src
->u
.channel
.wakeup_fd
>= 0) {
1110 closeret
= close(obj
->u
.channel
.wakeup_fd
);
1115 chan_error_wakeup_fd
:
1120 case LTTNG_UST_OBJECT_TYPE_STREAM
:
1122 obj
->u
.stream
.stream_nr
= src
->u
.stream
.stream_nr
;
1123 if (src
->u
.stream
.wakeup_fd
>= 0) {
1124 obj
->u
.stream
.wakeup_fd
=
1125 dup(src
->u
.stream
.wakeup_fd
);
1126 if (obj
->u
.stream
.wakeup_fd
< 0) {
1128 goto stream_error_wakeup_fd
;
1131 obj
->u
.stream
.wakeup_fd
=
1132 src
->u
.stream
.wakeup_fd
;
1135 if (src
->u
.stream
.shm_fd
>= 0) {
1136 obj
->u
.stream
.shm_fd
=
1137 dup(src
->u
.stream
.shm_fd
);
1138 if (obj
->u
.stream
.shm_fd
< 0) {
1140 goto stream_error_shm_fd
;
1143 obj
->u
.stream
.shm_fd
=
1144 src
->u
.stream
.shm_fd
;
1148 stream_error_shm_fd
:
1149 if (src
->u
.stream
.wakeup_fd
>= 0) {
1152 closeret
= close(obj
->u
.stream
.wakeup_fd
);
1157 stream_error_wakeup_fd
:
1161 case LTTNG_UST_OBJECT_TYPE_COUNTER
:
1163 obj
->u
.counter
.data
= zmalloc(obj
->size
);
1164 if (!obj
->u
.counter
.data
) {
1168 memcpy(obj
->u
.counter
.data
, src
->u
.counter
.data
, obj
->size
);
1172 case LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL
:
1174 if (src
->u
.counter_global
.shm_fd
>= 0) {
1175 obj
->u
.counter_global
.shm_fd
=
1176 dup(src
->u
.counter_global
.shm_fd
);
1177 if (obj
->u
.counter_global
.shm_fd
< 0) {
1185 case LTTNG_UST_OBJECT_TYPE_COUNTER_CPU
:
1187 obj
->u
.counter_cpu
.cpu_nr
= src
->u
.counter_cpu
.cpu_nr
;
1188 if (src
->u
.counter_cpu
.shm_fd
>= 0) {
1189 obj
->u
.counter_cpu
.shm_fd
=
1190 dup(src
->u
.counter_cpu
.shm_fd
);
1191 if (obj
->u
.counter_cpu
.shm_fd
< 0) {
1214 /* Buffer operations */
1216 int ustctl_get_nr_stream_per_channel(void)
1218 return num_possible_cpus();
1221 struct ustctl_consumer_channel
*
1222 ustctl_create_channel(struct ustctl_consumer_channel_attr
*attr
,
1223 const int *stream_fds
, int nr_stream_fds
)
1225 struct ustctl_consumer_channel
*chan
;
1226 const char *transport_name
;
1227 struct lttng_transport
*transport
;
1229 switch (attr
->type
) {
1230 case LTTNG_UST_CHAN_PER_CPU
:
1231 if (attr
->output
== LTTNG_UST_MMAP
) {
1232 if (attr
->overwrite
) {
1233 if (attr
->read_timer_interval
== 0) {
1234 transport_name
= "relay-overwrite-mmap";
1236 transport_name
= "relay-overwrite-rt-mmap";
1239 if (attr
->read_timer_interval
== 0) {
1240 transport_name
= "relay-discard-mmap";
1242 transport_name
= "relay-discard-rt-mmap";
1249 case LTTNG_UST_CHAN_METADATA
:
1250 if (attr
->output
== LTTNG_UST_MMAP
)
1251 transport_name
= "relay-metadata-mmap";
1256 transport_name
= "<unknown>";
1260 transport
= lttng_transport_find(transport_name
);
1262 DBG("LTTng transport %s not found\n",
1267 chan
= zmalloc(sizeof(*chan
));
1271 chan
->chan
= transport
->ops
.channel_create(transport_name
, NULL
,
1272 attr
->subbuf_size
, attr
->num_subbuf
,
1273 attr
->switch_timer_interval
,
1274 attr
->read_timer_interval
,
1275 attr
->uuid
, attr
->chan_id
,
1276 stream_fds
, nr_stream_fds
,
1277 attr
->blocking_timeout
);
1281 chan
->chan
->ops
= &transport
->ops
;
1282 memcpy(&chan
->attr
, attr
, sizeof(chan
->attr
));
1283 chan
->wait_fd
= ustctl_channel_get_wait_fd(chan
);
1284 chan
->wakeup_fd
= ustctl_channel_get_wakeup_fd(chan
);
1292 void ustctl_destroy_channel(struct ustctl_consumer_channel
*chan
)
1294 (void) ustctl_channel_close_wait_fd(chan
);
1295 (void) ustctl_channel_close_wakeup_fd(chan
);
1296 chan
->chan
->ops
->channel_destroy(chan
->chan
);
1300 int ustctl_send_channel_to_sessiond(int sock
,
1301 struct ustctl_consumer_channel
*channel
)
1303 struct shm_object_table
*table
;
1305 table
= channel
->chan
->handle
->table
;
1306 if (table
->size
<= 0)
1308 return ustctl_send_channel(sock
,
1310 table
->objects
[0].memory_map
,
1311 table
->objects
[0].memory_map_size
,
1316 int ustctl_send_stream_to_sessiond(int sock
,
1317 struct ustctl_consumer_stream
*stream
)
1320 return ustctl_send_stream(sock
, -1U, -1U, -1, -1, 0);
1322 return ustctl_send_stream(sock
,
1324 stream
->memory_map_size
,
1325 stream
->shm_fd
, stream
->wakeup_fd
,
1329 int ustctl_write_metadata_to_channel(
1330 struct ustctl_consumer_channel
*channel
,
1331 const char *metadata_str
, /* NOT null-terminated */
1332 size_t len
) /* metadata length */
1334 struct lttng_ust_lib_ring_buffer_ctx ctx
;
1335 struct lttng_channel
*chan
= channel
->chan
;
1336 const char *str
= metadata_str
;
1337 int ret
= 0, waitret
;
1338 size_t reserve_len
, pos
;
1340 for (pos
= 0; pos
< len
; pos
+= reserve_len
) {
1341 reserve_len
= min_t(size_t,
1342 chan
->ops
->packet_avail_size(chan
->chan
, chan
->handle
),
1344 lib_ring_buffer_ctx_init(&ctx
, chan
->chan
, NULL
, reserve_len
,
1345 sizeof(char), -1, chan
->handle
, NULL
);
1347 * We don't care about metadata buffer's records lost
1348 * count, because we always retry here. Report error if
1349 * we need to bail out after timeout or being
1352 waitret
= wait_cond_interruptible_timeout(
1354 ret
= chan
->ops
->event_reserve(&ctx
, 0);
1355 ret
!= -ENOBUFS
|| !ret
;
1357 LTTNG_METADATA_TIMEOUT_MSEC
);
1358 if (waitret
== -ETIMEDOUT
|| waitret
== -EINTR
|| ret
) {
1359 DBG("LTTng: Failure to write metadata to buffers (%s)\n",
1360 waitret
== -EINTR
? "interrupted" :
1361 (ret
== -ENOBUFS
? "timeout" : "I/O error"));
1362 if (waitret
== -EINTR
)
1366 chan
->ops
->event_write(&ctx
, &str
[pos
], reserve_len
);
1367 chan
->ops
->event_commit(&ctx
);
1374 * Write at most one packet in the channel.
1375 * Returns the number of bytes written on success, < 0 on error.
1377 ssize_t
ustctl_write_one_packet_to_channel(
1378 struct ustctl_consumer_channel
*channel
,
1379 const char *metadata_str
, /* NOT null-terminated */
1380 size_t len
) /* metadata length */
1382 struct lttng_ust_lib_ring_buffer_ctx ctx
;
1383 struct lttng_channel
*chan
= channel
->chan
;
1384 const char *str
= metadata_str
;
1385 ssize_t reserve_len
;
1388 reserve_len
= min_t(ssize_t
,
1389 chan
->ops
->packet_avail_size(chan
->chan
, chan
->handle
),
1391 lib_ring_buffer_ctx_init(&ctx
, chan
->chan
, NULL
, reserve_len
,
1392 sizeof(char), -1, chan
->handle
, NULL
);
1393 ret
= chan
->ops
->event_reserve(&ctx
, 0);
1395 DBG("LTTng: event reservation failed");
1400 chan
->ops
->event_write(&ctx
, str
, reserve_len
);
1401 chan
->ops
->event_commit(&ctx
);
1407 int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel
*consumer_chan
)
1409 struct channel
*chan
;
1412 chan
= consumer_chan
->chan
->chan
;
1413 ret
= ring_buffer_channel_close_wait_fd(&chan
->backend
.config
,
1414 chan
, chan
->handle
);
1416 consumer_chan
->wait_fd
= -1;
1420 int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel
*consumer_chan
)
1422 struct channel
*chan
;
1425 chan
= consumer_chan
->chan
->chan
;
1426 ret
= ring_buffer_channel_close_wakeup_fd(&chan
->backend
.config
,
1427 chan
, chan
->handle
);
1429 consumer_chan
->wakeup_fd
= -1;
1433 int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream
*stream
)
1435 struct channel
*chan
;
1437 chan
= stream
->chan
->chan
->chan
;
1438 return ring_buffer_stream_close_wait_fd(&chan
->backend
.config
,
1439 chan
, stream
->handle
, stream
->cpu
);
1442 int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream
*stream
)
1444 struct channel
*chan
;
1446 chan
= stream
->chan
->chan
->chan
;
1447 return ring_buffer_stream_close_wakeup_fd(&chan
->backend
.config
,
1448 chan
, stream
->handle
, stream
->cpu
);
1451 struct ustctl_consumer_stream
*
1452 ustctl_create_stream(struct ustctl_consumer_channel
*channel
,
1455 struct ustctl_consumer_stream
*stream
;
1456 struct lttng_ust_shm_handle
*handle
;
1457 struct channel
*chan
;
1458 int shm_fd
, wait_fd
, wakeup_fd
;
1459 uint64_t memory_map_size
;
1460 struct lttng_ust_lib_ring_buffer
*buf
;
1465 handle
= channel
->chan
->handle
;
1469 chan
= channel
->chan
->chan
;
1470 buf
= channel_get_ring_buffer(&chan
->backend
.config
,
1471 chan
, cpu
, handle
, &shm_fd
, &wait_fd
,
1472 &wakeup_fd
, &memory_map_size
);
1475 ret
= lib_ring_buffer_open_read(buf
, handle
);
1479 stream
= zmalloc(sizeof(*stream
));
1482 stream
->handle
= handle
;
1484 stream
->chan
= channel
;
1485 stream
->shm_fd
= shm_fd
;
1486 stream
->wait_fd
= wait_fd
;
1487 stream
->wakeup_fd
= wakeup_fd
;
1488 stream
->memory_map_size
= memory_map_size
;
1496 void ustctl_destroy_stream(struct ustctl_consumer_stream
*stream
)
1498 struct lttng_ust_lib_ring_buffer
*buf
;
1499 struct ustctl_consumer_channel
*consumer_chan
;
1503 consumer_chan
= stream
->chan
;
1504 (void) ustctl_stream_close_wait_fd(stream
);
1505 (void) ustctl_stream_close_wakeup_fd(stream
);
1506 lib_ring_buffer_release_read(buf
, consumer_chan
->chan
->handle
);
1510 int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel
*chan
)
1514 return shm_get_wait_fd(chan
->chan
->handle
,
1515 &chan
->chan
->handle
->chan
._ref
);
1518 int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel
*chan
)
1522 return shm_get_wakeup_fd(chan
->chan
->handle
,
1523 &chan
->chan
->handle
->chan
._ref
);
1526 int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream
*stream
)
1528 struct lttng_ust_lib_ring_buffer
*buf
;
1529 struct ustctl_consumer_channel
*consumer_chan
;
1534 consumer_chan
= stream
->chan
;
1535 return shm_get_wait_fd(consumer_chan
->chan
->handle
, &buf
->self
._ref
);
1538 int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream
*stream
)
1540 struct lttng_ust_lib_ring_buffer
*buf
;
1541 struct ustctl_consumer_channel
*consumer_chan
;
1546 consumer_chan
= stream
->chan
;
1547 return shm_get_wakeup_fd(consumer_chan
->chan
->handle
, &buf
->self
._ref
);
1550 /* For mmap mode, readable without "get" operation */
1552 void *ustctl_get_mmap_base(struct ustctl_consumer_stream
*stream
)
1554 struct lttng_ust_lib_ring_buffer
*buf
;
1555 struct ustctl_consumer_channel
*consumer_chan
;
1560 consumer_chan
= stream
->chan
;
1561 return shmp(consumer_chan
->chan
->handle
, buf
->backend
.memory_map
);
1564 /* returns the length to mmap. */
1565 int ustctl_get_mmap_len(struct ustctl_consumer_stream
*stream
,
1568 struct ustctl_consumer_channel
*consumer_chan
;
1569 unsigned long mmap_buf_len
;
1570 struct channel
*chan
;
1574 consumer_chan
= stream
->chan
;
1575 chan
= consumer_chan
->chan
->chan
;
1576 if (chan
->backend
.config
.output
!= RING_BUFFER_MMAP
)
1578 mmap_buf_len
= chan
->backend
.buf_size
;
1579 if (chan
->backend
.extra_reader_sb
)
1580 mmap_buf_len
+= chan
->backend
.subbuf_size
;
1581 if (mmap_buf_len
> INT_MAX
)
1583 *len
= mmap_buf_len
;
1587 /* returns the maximum size for sub-buffers. */
1588 int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream
*stream
,
1591 struct ustctl_consumer_channel
*consumer_chan
;
1592 struct channel
*chan
;
1596 consumer_chan
= stream
->chan
;
1597 chan
= consumer_chan
->chan
->chan
;
1598 *len
= chan
->backend
.subbuf_size
;
1603 * For mmap mode, operate on the current packet (between get/put or
1604 * get_next/put_next).
1607 /* returns the offset of the subbuffer belonging to the mmap reader. */
1608 int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream
*stream
,
1611 struct channel
*chan
;
1612 unsigned long sb_bindex
;
1613 struct lttng_ust_lib_ring_buffer
*buf
;
1614 struct ustctl_consumer_channel
*consumer_chan
;
1615 struct lttng_ust_lib_ring_buffer_backend_pages_shmp
*barray_idx
;
1616 struct lttng_ust_lib_ring_buffer_backend_pages
*pages
;
1621 consumer_chan
= stream
->chan
;
1622 chan
= consumer_chan
->chan
->chan
;
1623 if (chan
->backend
.config
.output
!= RING_BUFFER_MMAP
)
1625 sb_bindex
= subbuffer_id_get_index(&chan
->backend
.config
,
1626 buf
->backend
.buf_rsb
.id
);
1627 barray_idx
= shmp_index(consumer_chan
->chan
->handle
, buf
->backend
.array
,
1631 pages
= shmp(consumer_chan
->chan
->handle
, barray_idx
->shmp
);
1634 *off
= pages
->mmap_offset
;
1638 /* returns the size of the current sub-buffer, without padding (for mmap). */
1639 int ustctl_get_subbuf_size(struct ustctl_consumer_stream
*stream
,
1642 struct ustctl_consumer_channel
*consumer_chan
;
1643 struct channel
*chan
;
1644 struct lttng_ust_lib_ring_buffer
*buf
;
1650 consumer_chan
= stream
->chan
;
1651 chan
= consumer_chan
->chan
->chan
;
1652 *len
= lib_ring_buffer_get_read_data_size(&chan
->backend
.config
, buf
,
1653 consumer_chan
->chan
->handle
);
1657 /* returns the size of the current sub-buffer, without padding (for mmap). */
1658 int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream
*stream
,
1661 struct ustctl_consumer_channel
*consumer_chan
;
1662 struct channel
*chan
;
1663 struct lttng_ust_lib_ring_buffer
*buf
;
1668 consumer_chan
= stream
->chan
;
1669 chan
= consumer_chan
->chan
->chan
;
1670 *len
= lib_ring_buffer_get_read_data_size(&chan
->backend
.config
, buf
,
1671 consumer_chan
->chan
->handle
);
1672 *len
= PAGE_ALIGN(*len
);
1676 /* Get exclusive read access to the next sub-buffer that can be read. */
1677 int ustctl_get_next_subbuf(struct ustctl_consumer_stream
*stream
)
1679 struct lttng_ust_lib_ring_buffer
*buf
;
1680 struct ustctl_consumer_channel
*consumer_chan
;
1685 consumer_chan
= stream
->chan
;
1686 return lib_ring_buffer_get_next_subbuf(buf
,
1687 consumer_chan
->chan
->handle
);
1691 /* Release exclusive sub-buffer access, move consumer forward. */
1692 int ustctl_put_next_subbuf(struct ustctl_consumer_stream
*stream
)
1694 struct lttng_ust_lib_ring_buffer
*buf
;
1695 struct ustctl_consumer_channel
*consumer_chan
;
1700 consumer_chan
= stream
->chan
;
1701 lib_ring_buffer_put_next_subbuf(buf
, consumer_chan
->chan
->handle
);
1707 /* Get a snapshot of the current ring buffer producer and consumer positions */
1708 int ustctl_snapshot(struct ustctl_consumer_stream
*stream
)
1710 struct lttng_ust_lib_ring_buffer
*buf
;
1711 struct ustctl_consumer_channel
*consumer_chan
;
1716 consumer_chan
= stream
->chan
;
1717 return lib_ring_buffer_snapshot(buf
, &buf
->cons_snapshot
,
1718 &buf
->prod_snapshot
, consumer_chan
->chan
->handle
);
1722 * Get a snapshot of the current ring buffer producer and consumer positions
1723 * even if the consumed and produced positions are contained within the same
1726 int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream
*stream
)
1728 struct lttng_ust_lib_ring_buffer
*buf
;
1729 struct ustctl_consumer_channel
*consumer_chan
;
1734 consumer_chan
= stream
->chan
;
1735 return lib_ring_buffer_snapshot_sample_positions(buf
,
1736 &buf
->cons_snapshot
, &buf
->prod_snapshot
,
1737 consumer_chan
->chan
->handle
);
1740 /* Get the consumer position (iteration start) */
1741 int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream
*stream
,
1744 struct lttng_ust_lib_ring_buffer
*buf
;
1749 *pos
= buf
->cons_snapshot
;
1753 /* Get the producer position (iteration end) */
1754 int ustctl_snapshot_get_produced(struct ustctl_consumer_stream
*stream
,
1757 struct lttng_ust_lib_ring_buffer
*buf
;
1762 *pos
= buf
->prod_snapshot
;
1766 /* Get exclusive read access to the specified sub-buffer position */
1767 int ustctl_get_subbuf(struct ustctl_consumer_stream
*stream
,
1770 struct lttng_ust_lib_ring_buffer
*buf
;
1771 struct ustctl_consumer_channel
*consumer_chan
;
1776 consumer_chan
= stream
->chan
;
1777 return lib_ring_buffer_get_subbuf(buf
, *pos
,
1778 consumer_chan
->chan
->handle
);
1781 /* Release exclusive sub-buffer access */
1782 int ustctl_put_subbuf(struct ustctl_consumer_stream
*stream
)
1784 struct lttng_ust_lib_ring_buffer
*buf
;
1785 struct ustctl_consumer_channel
*consumer_chan
;
1790 consumer_chan
= stream
->chan
;
1791 lib_ring_buffer_put_subbuf(buf
, consumer_chan
->chan
->handle
);
1795 void ustctl_flush_buffer(struct ustctl_consumer_stream
*stream
,
1796 int producer_active
)
1798 struct lttng_ust_lib_ring_buffer
*buf
;
1799 struct ustctl_consumer_channel
*consumer_chan
;
1803 consumer_chan
= stream
->chan
;
1804 lib_ring_buffer_switch_slow(buf
,
1805 producer_active
? SWITCH_ACTIVE
: SWITCH_FLUSH
,
1806 consumer_chan
->chan
->handle
);
1809 void ustctl_clear_buffer(struct ustctl_consumer_stream
*stream
)
1811 struct lttng_ust_lib_ring_buffer
*buf
;
1812 struct ustctl_consumer_channel
*consumer_chan
;
1816 consumer_chan
= stream
->chan
;
1817 lib_ring_buffer_switch_slow(buf
, SWITCH_ACTIVE
,
1818 consumer_chan
->chan
->handle
);
1819 lib_ring_buffer_clear_reader(buf
, consumer_chan
->chan
->handle
);
1823 struct lttng_ust_client_lib_ring_buffer_client_cb
*get_client_cb(
1824 struct lttng_ust_lib_ring_buffer
*buf
,
1825 struct lttng_ust_shm_handle
*handle
)
1827 struct channel
*chan
;
1828 const struct lttng_ust_lib_ring_buffer_config
*config
;
1829 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1831 chan
= shmp(handle
, buf
->backend
.chan
);
1834 config
= &chan
->backend
.config
;
1835 if (!config
->cb_ptr
)
1837 client_cb
= caa_container_of(config
->cb_ptr
,
1838 struct lttng_ust_client_lib_ring_buffer_client_cb
,
1843 int ustctl_get_timestamp_begin(struct ustctl_consumer_stream
*stream
,
1844 uint64_t *timestamp_begin
)
1846 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1847 struct lttng_ust_lib_ring_buffer
*buf
;
1848 struct lttng_ust_shm_handle
*handle
;
1850 if (!stream
|| !timestamp_begin
)
1853 handle
= stream
->chan
->chan
->handle
;
1854 client_cb
= get_client_cb(buf
, handle
);
1857 return client_cb
->timestamp_begin(buf
, handle
, timestamp_begin
);
1860 int ustctl_get_timestamp_end(struct ustctl_consumer_stream
*stream
,
1861 uint64_t *timestamp_end
)
1863 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1864 struct lttng_ust_lib_ring_buffer
*buf
;
1865 struct lttng_ust_shm_handle
*handle
;
1867 if (!stream
|| !timestamp_end
)
1870 handle
= stream
->chan
->chan
->handle
;
1871 client_cb
= get_client_cb(buf
, handle
);
1874 return client_cb
->timestamp_end(buf
, handle
, timestamp_end
);
1877 int ustctl_get_events_discarded(struct ustctl_consumer_stream
*stream
,
1878 uint64_t *events_discarded
)
1880 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1881 struct lttng_ust_lib_ring_buffer
*buf
;
1882 struct lttng_ust_shm_handle
*handle
;
1884 if (!stream
|| !events_discarded
)
1887 handle
= stream
->chan
->chan
->handle
;
1888 client_cb
= get_client_cb(buf
, handle
);
1891 return client_cb
->events_discarded(buf
, handle
, events_discarded
);
1894 int ustctl_get_content_size(struct ustctl_consumer_stream
*stream
,
1895 uint64_t *content_size
)
1897 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1898 struct lttng_ust_lib_ring_buffer
*buf
;
1899 struct lttng_ust_shm_handle
*handle
;
1901 if (!stream
|| !content_size
)
1904 handle
= stream
->chan
->chan
->handle
;
1905 client_cb
= get_client_cb(buf
, handle
);
1908 return client_cb
->content_size(buf
, handle
, content_size
);
1911 int ustctl_get_packet_size(struct ustctl_consumer_stream
*stream
,
1912 uint64_t *packet_size
)
1914 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1915 struct lttng_ust_lib_ring_buffer
*buf
;
1916 struct lttng_ust_shm_handle
*handle
;
1918 if (!stream
|| !packet_size
)
1921 handle
= stream
->chan
->chan
->handle
;
1922 client_cb
= get_client_cb(buf
, handle
);
1925 return client_cb
->packet_size(buf
, handle
, packet_size
);
1928 int ustctl_get_stream_id(struct ustctl_consumer_stream
*stream
,
1929 uint64_t *stream_id
)
1931 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1932 struct lttng_ust_lib_ring_buffer
*buf
;
1933 struct lttng_ust_shm_handle
*handle
;
1935 if (!stream
|| !stream_id
)
1938 handle
= stream
->chan
->chan
->handle
;
1939 client_cb
= get_client_cb(buf
, handle
);
1942 return client_cb
->stream_id(buf
, handle
, stream_id
);
1945 int ustctl_get_current_timestamp(struct ustctl_consumer_stream
*stream
,
1948 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1949 struct lttng_ust_lib_ring_buffer
*buf
;
1950 struct lttng_ust_shm_handle
*handle
;
1955 handle
= stream
->chan
->chan
->handle
;
1956 client_cb
= get_client_cb(buf
, handle
);
1957 if (!client_cb
|| !client_cb
->current_timestamp
)
1959 return client_cb
->current_timestamp(buf
, handle
, ts
);
1962 int ustctl_get_sequence_number(struct ustctl_consumer_stream
*stream
,
1965 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1966 struct lttng_ust_lib_ring_buffer
*buf
;
1967 struct lttng_ust_shm_handle
*handle
;
1969 if (!stream
|| !seq
)
1972 handle
= stream
->chan
->chan
->handle
;
1973 client_cb
= get_client_cb(buf
, handle
);
1974 if (!client_cb
|| !client_cb
->sequence_number
)
1976 return client_cb
->sequence_number(buf
, handle
, seq
);
1979 int ustctl_get_instance_id(struct ustctl_consumer_stream
*stream
,
1982 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1983 struct lttng_ust_lib_ring_buffer
*buf
;
1984 struct lttng_ust_shm_handle
*handle
;
1989 handle
= stream
->chan
->chan
->handle
;
1990 client_cb
= get_client_cb(buf
, handle
);
1993 return client_cb
->instance_id(buf
, handle
, id
);
1996 #ifdef LTTNG_UST_HAVE_PERF_EVENT
1998 int ustctl_has_perf_counters(void)
2005 int ustctl_has_perf_counters(void)
2013 * Returns 0 on success, negative error value on error.
2015 int ustctl_recv_reg_msg(int sock
,
2016 enum ustctl_socket_type
*type
,
2023 uint32_t *bits_per_long
,
2024 uint32_t *uint8_t_alignment
,
2025 uint32_t *uint16_t_alignment
,
2026 uint32_t *uint32_t_alignment
,
2027 uint32_t *uint64_t_alignment
,
2028 uint32_t *long_alignment
,
2033 struct ustctl_reg_msg reg_msg
;
2035 len
= ustcomm_recv_unix_sock(sock
, ®_msg
, sizeof(reg_msg
));
2036 if (len
> 0 && len
!= sizeof(reg_msg
))
2043 if (reg_msg
.magic
== LTTNG_UST_COMM_MAGIC
) {
2044 *byte_order
= BYTE_ORDER
== BIG_ENDIAN
?
2045 BIG_ENDIAN
: LITTLE_ENDIAN
;
2046 } else if (reg_msg
.magic
== bswap_32(LTTNG_UST_COMM_MAGIC
)) {
2047 *byte_order
= BYTE_ORDER
== BIG_ENDIAN
?
2048 LITTLE_ENDIAN
: BIG_ENDIAN
;
2050 return -LTTNG_UST_ERR_INVAL_MAGIC
;
2052 switch (reg_msg
.socket_type
) {
2053 case 0: *type
= USTCTL_SOCKET_CMD
;
2055 case 1: *type
= USTCTL_SOCKET_NOTIFY
;
2058 return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE
;
2060 *major
= reg_msg
.major
;
2061 *minor
= reg_msg
.minor
;
2063 *ppid
= reg_msg
.ppid
;
2066 *bits_per_long
= reg_msg
.bits_per_long
;
2067 *uint8_t_alignment
= reg_msg
.uint8_t_alignment
;
2068 *uint16_t_alignment
= reg_msg
.uint16_t_alignment
;
2069 *uint32_t_alignment
= reg_msg
.uint32_t_alignment
;
2070 *uint64_t_alignment
= reg_msg
.uint64_t_alignment
;
2071 *long_alignment
= reg_msg
.long_alignment
;
2072 memcpy(name
, reg_msg
.name
, LTTNG_UST_ABI_PROCNAME_LEN
);
2073 if (reg_msg
.major
< LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE
||
2074 reg_msg
.major
> LTTNG_UST_ABI_MAJOR_VERSION
) {
2075 return -LTTNG_UST_ERR_UNSUP_MAJOR
;
2081 int ustctl_recv_notify(int sock
, enum ustctl_notify_cmd
*notify_cmd
)
2083 struct ustcomm_notify_hdr header
;
2086 len
= ustcomm_recv_unix_sock(sock
, &header
, sizeof(header
));
2087 if (len
> 0 && len
!= sizeof(header
))
2093 switch (header
.notify_cmd
) {
2095 *notify_cmd
= USTCTL_NOTIFY_CMD_EVENT
;
2098 *notify_cmd
= USTCTL_NOTIFY_CMD_CHANNEL
;
2101 *notify_cmd
= USTCTL_NOTIFY_CMD_ENUM
;
2110 * Returns 0 on success, negative error value on error.
2112 int ustctl_recv_register_event(int sock
,
2119 struct ustctl_field
**fields
,
2120 char **model_emf_uri
)
2123 struct ustcomm_notify_event_msg msg
;
2124 size_t signature_len
, fields_len
, model_emf_uri_len
;
2125 char *a_sign
= NULL
, *a_model_emf_uri
= NULL
;
2126 struct ustctl_field
*a_fields
= NULL
;
2128 len
= ustcomm_recv_unix_sock(sock
, &msg
, sizeof(msg
));
2129 if (len
> 0 && len
!= sizeof(msg
))
2136 *session_objd
= msg
.session_objd
;
2137 *channel_objd
= msg
.channel_objd
;
2138 strncpy(event_name
, msg
.event_name
, LTTNG_UST_SYM_NAME_LEN
);
2139 event_name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
2140 *loglevel
= msg
.loglevel
;
2141 signature_len
= msg
.signature_len
;
2142 fields_len
= msg
.fields_len
;
2144 if (fields_len
% sizeof(*a_fields
) != 0) {
2148 model_emf_uri_len
= msg
.model_emf_uri_len
;
2150 /* recv signature. contains at least \0. */
2151 a_sign
= zmalloc(signature_len
);
2154 len
= ustcomm_recv_unix_sock(sock
, a_sign
, signature_len
);
2155 if (len
> 0 && len
!= signature_len
) {
2157 goto signature_error
;
2161 goto signature_error
;
2164 goto signature_error
;
2166 /* Enforce end of string */
2167 a_sign
[signature_len
- 1] = '\0';
2171 a_fields
= zmalloc(fields_len
);
2174 goto signature_error
;
2176 len
= ustcomm_recv_unix_sock(sock
, a_fields
, fields_len
);
2177 if (len
> 0 && len
!= fields_len
) {
2190 if (model_emf_uri_len
) {
2191 /* recv model_emf_uri_len */
2192 a_model_emf_uri
= zmalloc(model_emf_uri_len
);
2193 if (!a_model_emf_uri
) {
2197 len
= ustcomm_recv_unix_sock(sock
, a_model_emf_uri
,
2199 if (len
> 0 && len
!= model_emf_uri_len
) {
2210 /* Enforce end of string */
2211 a_model_emf_uri
[model_emf_uri_len
- 1] = '\0';
2214 *signature
= a_sign
;
2215 *nr_fields
= fields_len
/ sizeof(*a_fields
);
2217 *model_emf_uri
= a_model_emf_uri
;
2222 free(a_model_emf_uri
);
2231 * Returns 0 on success, negative error value on error.
2233 int ustctl_reply_register_event(int sock
,
2239 struct ustcomm_notify_hdr header
;
2240 struct ustcomm_notify_event_reply r
;
2243 memset(&reply
, 0, sizeof(reply
));
2244 reply
.header
.notify_cmd
= USTCTL_NOTIFY_CMD_EVENT
;
2245 reply
.r
.ret_code
= ret_code
;
2246 reply
.r
.event_id
= id
;
2247 len
= ustcomm_send_unix_sock(sock
, &reply
, sizeof(reply
));
2248 if (len
> 0 && len
!= sizeof(reply
))
2256 * Returns 0 on success, negative UST or system error value on error.
2258 int ustctl_recv_register_enum(int sock
,
2261 struct ustctl_enum_entry
**entries
,
2265 struct ustcomm_notify_enum_msg msg
;
2267 struct ustctl_enum_entry
*a_entries
= NULL
;
2269 len
= ustcomm_recv_unix_sock(sock
, &msg
, sizeof(msg
));
2270 if (len
> 0 && len
!= sizeof(msg
))
2277 *session_objd
= msg
.session_objd
;
2278 strncpy(enum_name
, msg
.enum_name
, LTTNG_UST_SYM_NAME_LEN
);
2279 enum_name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
2280 entries_len
= msg
.entries_len
;
2282 if (entries_len
% sizeof(*a_entries
) != 0) {
2288 a_entries
= zmalloc(entries_len
);
2291 len
= ustcomm_recv_unix_sock(sock
, a_entries
, entries_len
);
2292 if (len
> 0 && len
!= entries_len
) {
2304 *nr_entries
= entries_len
/ sizeof(*a_entries
);
2305 *entries
= a_entries
;
2315 * Returns 0 on success, negative error value on error.
2317 int ustctl_reply_register_enum(int sock
,
2323 struct ustcomm_notify_hdr header
;
2324 struct ustcomm_notify_enum_reply r
;
2327 memset(&reply
, 0, sizeof(reply
));
2328 reply
.header
.notify_cmd
= USTCTL_NOTIFY_CMD_ENUM
;
2329 reply
.r
.ret_code
= ret_code
;
2330 reply
.r
.enum_id
= id
;
2331 len
= ustcomm_send_unix_sock(sock
, &reply
, sizeof(reply
));
2332 if (len
> 0 && len
!= sizeof(reply
))
2340 * Returns 0 on success, negative UST or system error value on error.
2342 int ustctl_recv_register_channel(int sock
,
2343 int *session_objd
, /* session descriptor (output) */
2344 int *channel_objd
, /* channel descriptor (output) */
2346 struct ustctl_field
**fields
)
2349 struct ustcomm_notify_channel_msg msg
;
2351 struct ustctl_field
*a_fields
;
2353 len
= ustcomm_recv_unix_sock(sock
, &msg
, sizeof(msg
));
2354 if (len
> 0 && len
!= sizeof(msg
))
2361 *session_objd
= msg
.session_objd
;
2362 *channel_objd
= msg
.channel_objd
;
2363 fields_len
= msg
.ctx_fields_len
;
2365 if (fields_len
% sizeof(*a_fields
) != 0) {
2371 a_fields
= zmalloc(fields_len
);
2376 len
= ustcomm_recv_unix_sock(sock
, a_fields
, fields_len
);
2377 if (len
> 0 && len
!= fields_len
) {
2392 *nr_fields
= fields_len
/ sizeof(*a_fields
);
2402 * Returns 0 on success, negative error value on error.
2404 int ustctl_reply_register_channel(int sock
,
2406 enum ustctl_channel_header header_type
,
2411 struct ustcomm_notify_hdr header
;
2412 struct ustcomm_notify_channel_reply r
;
2415 memset(&reply
, 0, sizeof(reply
));
2416 reply
.header
.notify_cmd
= USTCTL_NOTIFY_CMD_CHANNEL
;
2417 reply
.r
.ret_code
= ret_code
;
2418 reply
.r
.chan_id
= chan_id
;
2419 switch (header_type
) {
2420 case USTCTL_CHANNEL_HEADER_COMPACT
:
2421 reply
.r
.header_type
= 1;
2423 case USTCTL_CHANNEL_HEADER_LARGE
:
2424 reply
.r
.header_type
= 2;
2427 reply
.r
.header_type
= 0;
2430 len
= ustcomm_send_unix_sock(sock
, &reply
, sizeof(reply
));
2431 if (len
> 0 && len
!= sizeof(reply
))
2438 /* Regenerate the statedump. */
2439 int ustctl_regenerate_statedump(int sock
, int handle
)
2441 struct ustcomm_ust_msg lum
;
2442 struct ustcomm_ust_reply lur
;
2445 memset(&lum
, 0, sizeof(lum
));
2446 lum
.handle
= handle
;
2447 lum
.cmd
= LTTNG_UST_SESSION_STATEDUMP
;
2448 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
2451 DBG("Regenerated statedump for handle %u", handle
);
2455 /* counter operations */
2457 int ustctl_get_nr_cpu_per_counter(void)
2459 return lttng_counter_num_possible_cpus();
2462 struct ustctl_daemon_counter
*
2463 ustctl_create_counter(size_t nr_dimensions
,
2464 const struct ustctl_counter_dimension
*dimensions
,
2465 int64_t global_sum_step
,
2466 int global_counter_fd
,
2467 int nr_counter_cpu_fds
,
2468 const int *counter_cpu_fds
,
2469 enum ustctl_counter_bitness bitness
,
2470 enum ustctl_counter_arithmetic arithmetic
,
2471 uint32_t alloc_flags
)
2473 const char *transport_name
;
2474 struct ustctl_daemon_counter
*counter
;
2475 struct lttng_counter_transport
*transport
;
2476 struct lttng_counter_dimension ust_dim
[LTTNG_COUNTER_DIMENSION_MAX
];
2479 if (nr_dimensions
> LTTNG_COUNTER_DIMENSION_MAX
)
2481 /* Currently, only per-cpu allocation is supported. */
2482 switch (alloc_flags
) {
2483 case USTCTL_COUNTER_ALLOC_PER_CPU
:
2486 case USTCTL_COUNTER_ALLOC_PER_CPU
| USTCTL_COUNTER_ALLOC_GLOBAL
:
2487 case USTCTL_COUNTER_ALLOC_GLOBAL
:
2492 case USTCTL_COUNTER_BITNESS_32
:
2493 switch (arithmetic
) {
2494 case USTCTL_COUNTER_ARITHMETIC_MODULAR
:
2495 transport_name
= "counter-per-cpu-32-modular";
2497 case USTCTL_COUNTER_ARITHMETIC_SATURATION
:
2498 transport_name
= "counter-per-cpu-32-saturation";
2504 case USTCTL_COUNTER_BITNESS_64
:
2505 switch (arithmetic
) {
2506 case USTCTL_COUNTER_ARITHMETIC_MODULAR
:
2507 transport_name
= "counter-per-cpu-64-modular";
2509 case USTCTL_COUNTER_ARITHMETIC_SATURATION
:
2510 transport_name
= "counter-per-cpu-64-saturation";
2520 transport
= lttng_counter_transport_find(transport_name
);
2522 DBG("LTTng transport %s not found\n",
2527 counter
= zmalloc(sizeof(*counter
));
2530 counter
->attr
= zmalloc(sizeof(*counter
->attr
));
2533 counter
->attr
->bitness
= bitness
;
2534 counter
->attr
->arithmetic
= arithmetic
;
2535 counter
->attr
->nr_dimensions
= nr_dimensions
;
2536 counter
->attr
->global_sum_step
= global_sum_step
;
2537 for (i
= 0; i
< nr_dimensions
; i
++)
2538 counter
->attr
->dimensions
[i
] = dimensions
[i
];
2540 for (i
= 0; i
< nr_dimensions
; i
++) {
2541 ust_dim
[i
].size
= dimensions
[i
].size
;
2542 ust_dim
[i
].underflow_index
= dimensions
[i
].underflow_index
;
2543 ust_dim
[i
].overflow_index
= dimensions
[i
].overflow_index
;
2544 ust_dim
[i
].has_underflow
= dimensions
[i
].has_underflow
;
2545 ust_dim
[i
].has_overflow
= dimensions
[i
].has_overflow
;
2547 counter
->counter
= transport
->ops
.counter_create(nr_dimensions
,
2548 ust_dim
, global_sum_step
, global_counter_fd
,
2549 nr_counter_cpu_fds
, counter_cpu_fds
, true);
2550 if (!counter
->counter
)
2552 counter
->ops
= &transport
->ops
;
2556 free(counter
->attr
);
2562 int ustctl_create_counter_data(struct ustctl_daemon_counter
*counter
,
2563 struct lttng_ust_object_data
**_counter_data
)
2565 struct lttng_ust_object_data
*counter_data
;
2566 struct lttng_ust_counter_conf counter_conf
;
2570 switch (counter
->attr
->arithmetic
) {
2571 case USTCTL_COUNTER_ARITHMETIC_MODULAR
:
2572 counter_conf
.arithmetic
= LTTNG_UST_COUNTER_ARITHMETIC_MODULAR
;
2574 case USTCTL_COUNTER_ARITHMETIC_SATURATION
:
2575 counter_conf
.arithmetic
= LTTNG_UST_COUNTER_ARITHMETIC_SATURATION
;
2580 switch (counter
->attr
->bitness
) {
2581 case USTCTL_COUNTER_BITNESS_32
:
2582 counter_conf
.bitness
= LTTNG_UST_COUNTER_BITNESS_32BITS
;
2584 case USTCTL_COUNTER_BITNESS_64
:
2585 counter_conf
.bitness
= LTTNG_UST_COUNTER_BITNESS_64BITS
;
2590 counter_conf
.number_dimensions
= counter
->attr
->nr_dimensions
;
2591 counter_conf
.global_sum_step
= counter
->attr
->global_sum_step
;
2592 for (i
= 0; i
< counter
->attr
->nr_dimensions
; i
++) {
2593 counter_conf
.dimensions
[i
].size
= counter
->attr
->dimensions
[i
].size
;
2594 counter_conf
.dimensions
[i
].underflow_index
= counter
->attr
->dimensions
[i
].underflow_index
;
2595 counter_conf
.dimensions
[i
].overflow_index
= counter
->attr
->dimensions
[i
].overflow_index
;
2596 counter_conf
.dimensions
[i
].has_underflow
= counter
->attr
->dimensions
[i
].has_underflow
;
2597 counter_conf
.dimensions
[i
].has_overflow
= counter
->attr
->dimensions
[i
].has_overflow
;
2600 counter_data
= zmalloc(sizeof(*counter_data
));
2601 if (!counter_data
) {
2605 counter_data
->type
= LTTNG_UST_OBJECT_TYPE_COUNTER
;
2606 counter_data
->handle
= -1;
2608 counter_data
->size
= sizeof(counter_conf
);
2609 counter_data
->u
.counter
.data
= zmalloc(sizeof(counter_conf
));
2610 if (!counter_data
->u
.counter
.data
) {
2612 goto error_alloc_data
;
2615 memcpy(counter_data
->u
.counter
.data
, &counter_conf
, sizeof(counter_conf
));
2616 *_counter_data
= counter_data
;
2626 int ustctl_create_counter_global_data(struct ustctl_daemon_counter
*counter
,
2627 struct lttng_ust_object_data
**_counter_global_data
)
2629 struct lttng_ust_object_data
*counter_global_data
;
2633 if (lttng_counter_get_global_shm(counter
->counter
, &fd
, &len
))
2635 counter_global_data
= zmalloc(sizeof(*counter_global_data
));
2636 if (!counter_global_data
) {
2640 counter_global_data
->type
= LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL
;
2641 counter_global_data
->handle
= -1;
2642 counter_global_data
->size
= len
;
2643 counter_global_data
->u
.counter_global
.shm_fd
= fd
;
2644 *_counter_global_data
= counter_global_data
;
2651 int ustctl_create_counter_cpu_data(struct ustctl_daemon_counter
*counter
, int cpu
,
2652 struct lttng_ust_object_data
**_counter_cpu_data
)
2654 struct lttng_ust_object_data
*counter_cpu_data
;
2658 if (lttng_counter_get_cpu_shm(counter
->counter
, cpu
, &fd
, &len
))
2660 counter_cpu_data
= zmalloc(sizeof(*counter_cpu_data
));
2661 if (!counter_cpu_data
) {
2665 counter_cpu_data
->type
= LTTNG_UST_OBJECT_TYPE_COUNTER_CPU
;
2666 counter_cpu_data
->handle
= -1;
2667 counter_cpu_data
->size
= len
;
2668 counter_cpu_data
->u
.counter_cpu
.shm_fd
= fd
;
2669 counter_cpu_data
->u
.counter_cpu
.cpu_nr
= cpu
;
2670 *_counter_cpu_data
= counter_cpu_data
;
2677 void ustctl_destroy_counter(struct ustctl_daemon_counter
*counter
)
2679 counter
->ops
->counter_destroy(counter
->counter
);
2680 free(counter
->attr
);
2684 int ustctl_send_counter_data_to_ust(int sock
, int parent_handle
,
2685 struct lttng_ust_object_data
*counter_data
)
2687 struct ustcomm_ust_msg lum
;
2688 struct ustcomm_ust_reply lur
;
2696 size
= counter_data
->size
;
2697 memset(&lum
, 0, sizeof(lum
));
2698 lum
.handle
= parent_handle
;
2699 lum
.cmd
= LTTNG_UST_COUNTER
;
2700 lum
.u
.counter
.len
= size
;
2701 ret
= ustcomm_send_app_msg(sock
, &lum
);
2705 /* Send counter data */
2706 len
= ustcomm_send_unix_sock(sock
, counter_data
->u
.counter
.data
, size
);
2714 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
2716 counter_data
->handle
= lur
.ret_val
;
2721 int ustctl_send_counter_global_data_to_ust(int sock
,
2722 struct lttng_ust_object_data
*counter_data
,
2723 struct lttng_ust_object_data
*counter_global_data
)
2725 struct ustcomm_ust_msg lum
;
2726 struct ustcomm_ust_reply lur
;
2731 if (!counter_data
|| !counter_global_data
)
2734 size
= counter_global_data
->size
;
2735 memset(&lum
, 0, sizeof(lum
));
2736 lum
.handle
= counter_data
->handle
; /* parent handle */
2737 lum
.cmd
= LTTNG_UST_COUNTER_GLOBAL
;
2738 lum
.u
.counter_global
.len
= size
;
2739 ret
= ustcomm_send_app_msg(sock
, &lum
);
2743 shm_fd
[0] = counter_global_data
->u
.counter_global
.shm_fd
;
2744 len
= ustcomm_send_fds_unix_sock(sock
, shm_fd
, 1);
2752 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
2754 counter_global_data
->handle
= lur
.ret_val
;
2759 int ustctl_send_counter_cpu_data_to_ust(int sock
,
2760 struct lttng_ust_object_data
*counter_data
,
2761 struct lttng_ust_object_data
*counter_cpu_data
)
2763 struct ustcomm_ust_msg lum
;
2764 struct ustcomm_ust_reply lur
;
2769 if (!counter_data
|| !counter_cpu_data
)
2772 size
= counter_cpu_data
->size
;
2773 memset(&lum
, 0, sizeof(lum
));
2774 lum
.handle
= counter_data
->handle
; /* parent handle */
2775 lum
.cmd
= LTTNG_UST_COUNTER_CPU
;
2776 lum
.u
.counter_cpu
.len
= size
;
2777 lum
.u
.counter_cpu
.cpu_nr
= counter_cpu_data
->u
.counter_cpu
.cpu_nr
;
2778 ret
= ustcomm_send_app_msg(sock
, &lum
);
2782 shm_fd
[0] = counter_cpu_data
->u
.counter_global
.shm_fd
;
2783 len
= ustcomm_send_fds_unix_sock(sock
, shm_fd
, 1);
2791 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
2793 counter_cpu_data
->handle
= lur
.ret_val
;
2798 int ustctl_counter_read(struct ustctl_daemon_counter
*counter
,
2799 const size_t *dimension_indexes
,
2800 int cpu
, int64_t *value
,
2801 bool *overflow
, bool *underflow
)
2803 return counter
->ops
->counter_read(counter
->counter
, dimension_indexes
, cpu
,
2804 value
, overflow
, underflow
);
2807 int ustctl_counter_aggregate(struct ustctl_daemon_counter
*counter
,
2808 const size_t *dimension_indexes
,
2810 bool *overflow
, bool *underflow
)
2812 return counter
->ops
->counter_aggregate(counter
->counter
, dimension_indexes
,
2813 value
, overflow
, underflow
);
2816 int ustctl_counter_clear(struct ustctl_daemon_counter
*counter
,
2817 const size_t *dimension_indexes
)
2819 return counter
->ops
->counter_clear(counter
->counter
, dimension_indexes
);
2822 static __attribute__((constructor
))
2823 void ustctl_init(void)
2826 lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */
2827 lttng_ust_clock_init();
2828 lttng_ring_buffer_metadata_client_init();
2829 lttng_ring_buffer_client_overwrite_init();
2830 lttng_ring_buffer_client_overwrite_rt_init();
2831 lttng_ring_buffer_client_discard_init();
2832 lttng_ring_buffer_client_discard_rt_init();
2833 lttng_counter_client_percpu_32_overflow_init();
2834 lttng_counter_client_percpu_64_overflow_init();
2835 lib_ringbuffer_signal_init();
2838 static __attribute__((destructor
))
2839 void ustctl_exit(void)
2841 lttng_ring_buffer_client_discard_rt_exit();
2842 lttng_ring_buffer_client_discard_exit();
2843 lttng_ring_buffer_client_overwrite_rt_exit();
2844 lttng_ring_buffer_client_overwrite_exit();
2845 lttng_ring_buffer_metadata_client_exit();
2846 lttng_counter_client_percpu_32_overflow_exit();
2847 lttng_counter_client_percpu_64_overflow_exit();