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.
24 #include <lttng/ust-config.h>
25 #include <lttng/ust-ctl.h>
26 #include <lttng/ust-abi.h>
27 #include <lttng/ust-events.h>
28 #include <lttng/ust-endian.h>
29 #include <usterr-signal-safe.h>
33 #include "../libringbuffer/backend.h"
34 #include "../libringbuffer/frontend.h"
35 #include "../liblttng-ust/wait.h"
36 #include "../liblttng-ust/lttng-rb-clients.h"
37 #include "../liblttng-ust/clock.h"
38 #include "../liblttng-ust/getenv.h"
40 #include "../libcounter/shm.h"
41 #include "../libcounter/smp.h"
42 #include "../libcounter/counter.h"
45 * Number of milliseconds to retry before failing metadata writes on
46 * buffer full condition. (10 seconds)
48 #define LTTNG_METADATA_TIMEOUT_MSEC 10000
51 * Channel representation within consumer.
53 struct ustctl_consumer_channel
{
54 struct lttng_channel
*chan
; /* lttng channel buffers */
56 /* initial attributes */
57 struct ustctl_consumer_channel_attr attr
;
58 int wait_fd
; /* monitor close() */
59 int wakeup_fd
; /* monitor close() */
63 * Stream representation within consumer.
65 struct ustctl_consumer_stream
{
66 struct lttng_ust_shm_handle
*handle
; /* shared-memory handle */
67 struct lttng_ust_lib_ring_buffer
*buf
;
68 struct ustctl_consumer_channel
*chan
;
69 int shm_fd
, wait_fd
, wakeup_fd
;
71 uint64_t memory_map_size
;
74 #define USTCTL_COUNTER_ATTR_DIMENSION_MAX 8
75 struct ustctl_counter_attr
{
76 enum ustctl_counter_arithmetic arithmetic
;
77 enum ustctl_counter_bitness bitness
;
78 uint32_t nr_dimensions
;
79 int64_t global_sum_step
;
80 struct ustctl_counter_dimension dimensions
[USTCTL_COUNTER_ATTR_DIMENSION_MAX
];
84 * Counter representation within daemon.
86 struct ustctl_daemon_counter
{
87 struct lib_counter
*counter
;
88 const struct lttng_counter_ops
*ops
;
89 struct ustctl_counter_attr
*attr
; /* initial attributes */
92 extern void lttng_ring_buffer_client_overwrite_init(void);
93 extern void lttng_ring_buffer_client_overwrite_rt_init(void);
94 extern void lttng_ring_buffer_client_discard_init(void);
95 extern void lttng_ring_buffer_client_discard_rt_init(void);
96 extern void lttng_ring_buffer_metadata_client_init(void);
97 extern void lttng_ring_buffer_client_overwrite_exit(void);
98 extern void lttng_ring_buffer_client_overwrite_rt_exit(void);
99 extern void lttng_ring_buffer_client_discard_exit(void);
100 extern void lttng_ring_buffer_client_discard_rt_exit(void);
101 extern void lttng_ring_buffer_metadata_client_exit(void);
102 extern void lttng_counter_client_percpu_32_modular_init(void);
103 extern void lttng_counter_client_percpu_32_modular_exit(void);
104 extern void lttng_counter_client_percpu_64_modular_init(void);
105 extern void lttng_counter_client_percpu_64_modular_exit(void);
107 int ustctl_release_handle(int sock
, int handle
)
109 struct ustcomm_ust_msg lum
;
110 struct ustcomm_ust_reply lur
;
112 if (sock
< 0 || handle
< 0)
114 memset(&lum
, 0, sizeof(lum
));
116 lum
.cmd
= LTTNG_UST_RELEASE
;
117 return ustcomm_send_app_cmd(sock
, &lum
, &lur
);
121 * If sock is negative, it means we don't have to notify the other side
122 * (e.g. application has already vanished).
124 int ustctl_release_object(int sock
, struct lttng_ust_object_data
*data
)
131 switch (data
->type
) {
132 case LTTNG_UST_OBJECT_TYPE_CHANNEL
:
133 if (data
->u
.channel
.wakeup_fd
>= 0) {
134 ret
= close(data
->u
.channel
.wakeup_fd
);
139 data
->u
.channel
.wakeup_fd
= -1;
141 free(data
->u
.channel
.data
);
142 data
->u
.channel
.data
= NULL
;
144 case LTTNG_UST_OBJECT_TYPE_STREAM
:
145 if (data
->u
.stream
.shm_fd
>= 0) {
146 ret
= close(data
->u
.stream
.shm_fd
);
151 data
->u
.stream
.shm_fd
= -1;
153 if (data
->u
.stream
.wakeup_fd
>= 0) {
154 ret
= close(data
->u
.stream
.wakeup_fd
);
159 data
->u
.stream
.wakeup_fd
= -1;
162 case LTTNG_UST_OBJECT_TYPE_EVENT
:
163 case LTTNG_UST_OBJECT_TYPE_CONTEXT
:
164 case LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP
:
165 case LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER
:
167 case LTTNG_UST_OBJECT_TYPE_COUNTER
:
168 free(data
->u
.counter
.data
);
169 data
->u
.counter
.data
= NULL
;
171 case LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL
:
172 if (data
->u
.counter_global
.shm_fd
>= 0) {
173 ret
= close(data
->u
.counter_global
.shm_fd
);
178 data
->u
.counter_global
.shm_fd
= -1;
181 case LTTNG_UST_OBJECT_TYPE_COUNTER_CPU
:
182 if (data
->u
.counter_cpu
.shm_fd
>= 0) {
183 ret
= close(data
->u
.counter_cpu
.shm_fd
);
188 data
->u
.counter_cpu
.shm_fd
= -1;
194 return ustctl_release_handle(sock
, data
->handle
);
198 * Send registration done packet to the application.
200 int ustctl_register_done(int sock
)
202 struct ustcomm_ust_msg lum
;
203 struct ustcomm_ust_reply lur
;
206 DBG("Sending register done command to %d", sock
);
207 memset(&lum
, 0, sizeof(lum
));
208 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
209 lum
.cmd
= LTTNG_UST_REGISTER_DONE
;
210 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
217 * returns session handle.
219 int ustctl_create_session(int sock
)
221 struct ustcomm_ust_msg lum
;
222 struct ustcomm_ust_reply lur
;
223 int ret
, session_handle
;
226 memset(&lum
, 0, sizeof(lum
));
227 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
228 lum
.cmd
= LTTNG_UST_SESSION
;
229 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
232 session_handle
= lur
.ret_val
;
233 DBG("received session handle %u", session_handle
);
234 return session_handle
;
237 int ustctl_create_event(int sock
, struct lttng_ust_event
*ev
,
238 struct lttng_ust_object_data
*channel_data
,
239 struct lttng_ust_object_data
**_event_data
)
241 struct ustcomm_ust_msg lum
;
242 struct ustcomm_ust_reply lur
;
243 struct lttng_ust_object_data
*event_data
;
246 if (!channel_data
|| !_event_data
)
249 event_data
= zmalloc(sizeof(*event_data
));
252 event_data
->type
= LTTNG_UST_OBJECT_TYPE_EVENT
;
253 memset(&lum
, 0, sizeof(lum
));
254 lum
.handle
= channel_data
->handle
;
255 lum
.cmd
= LTTNG_UST_EVENT
;
256 strncpy(lum
.u
.event
.name
, ev
->name
,
257 LTTNG_UST_SYM_NAME_LEN
);
258 lum
.u
.event
.instrumentation
= ev
->instrumentation
;
259 lum
.u
.event
.loglevel_type
= ev
->loglevel_type
;
260 lum
.u
.event
.loglevel
= ev
->loglevel
;
261 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
266 event_data
->handle
= lur
.ret_val
;
267 DBG("received event handle %u", event_data
->handle
);
268 *_event_data
= event_data
;
272 int ustctl_add_context(int sock
, struct lttng_ust_context_attr
*ctx
,
273 struct lttng_ust_object_data
*obj_data
,
274 struct lttng_ust_object_data
**_context_data
)
276 struct ustcomm_ust_msg lum
;
277 struct ustcomm_ust_reply lur
;
278 struct lttng_ust_object_data
*context_data
= NULL
;
283 if (!obj_data
|| !_context_data
) {
288 context_data
= zmalloc(sizeof(*context_data
));
293 context_data
->type
= LTTNG_UST_OBJECT_TYPE_CONTEXT
;
294 memset(&lum
, 0, sizeof(lum
));
295 lum
.handle
= obj_data
->handle
;
296 lum
.cmd
= LTTNG_UST_CONTEXT
;
298 lum
.u
.context
.ctx
= ctx
->ctx
;
300 case LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER
:
301 lum
.u
.context
.u
.perf_counter
= ctx
->u
.perf_counter
;
303 case LTTNG_UST_CONTEXT_APP_CONTEXT
:
305 size_t provider_name_len
= strlen(
306 ctx
->u
.app_ctx
.provider_name
) + 1;
307 size_t ctx_name_len
= strlen(ctx
->u
.app_ctx
.ctx_name
) + 1;
309 lum
.u
.context
.u
.app_ctx
.provider_name_len
= provider_name_len
;
310 lum
.u
.context
.u
.app_ctx
.ctx_name_len
= ctx_name_len
;
312 len
= provider_name_len
+ ctx_name_len
;
318 memcpy(buf
, ctx
->u
.app_ctx
.provider_name
,
320 memcpy(buf
+ provider_name_len
, ctx
->u
.app_ctx
.ctx_name
,
327 ret
= ustcomm_send_app_msg(sock
, &lum
);
331 /* send var len ctx_name */
332 ret
= ustcomm_send_unix_sock(sock
, buf
, len
);
341 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
345 context_data
->handle
= -1;
346 DBG("Context created successfully");
347 *_context_data
= context_data
;
355 int ustctl_set_filter(int sock
, struct lttng_ust_filter_bytecode
*bytecode
,
356 struct lttng_ust_object_data
*obj_data
)
358 struct ustcomm_ust_msg lum
;
359 struct ustcomm_ust_reply lur
;
365 memset(&lum
, 0, sizeof(lum
));
366 lum
.handle
= obj_data
->handle
;
367 lum
.cmd
= LTTNG_UST_FILTER
;
368 lum
.u
.filter
.data_size
= bytecode
->len
;
369 lum
.u
.filter
.reloc_offset
= bytecode
->reloc_offset
;
370 lum
.u
.filter
.seqnum
= bytecode
->seqnum
;
372 ret
= ustcomm_send_app_msg(sock
, &lum
);
375 /* send var len bytecode */
376 ret
= ustcomm_send_unix_sock(sock
, bytecode
->data
,
381 if (ret
!= bytecode
->len
)
383 return ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
386 int ustctl_set_capture(int sock
, struct lttng_ust_capture_bytecode
*bytecode
,
387 struct lttng_ust_object_data
*obj_data
)
389 struct ustcomm_ust_msg lum
;
390 struct ustcomm_ust_reply lur
;
396 memset(&lum
, 0, sizeof(lum
));
397 lum
.handle
= obj_data
->handle
;
398 lum
.cmd
= LTTNG_UST_CAPTURE
;
399 lum
.u
.capture
.data_size
= bytecode
->len
;
400 lum
.u
.capture
.reloc_offset
= bytecode
->reloc_offset
;
401 lum
.u
.capture
.seqnum
= bytecode
->seqnum
;
403 ret
= ustcomm_send_app_msg(sock
, &lum
);
406 /* send var len bytecode */
407 ret
= ustcomm_send_unix_sock(sock
, bytecode
->data
,
412 if (ret
!= bytecode
->len
)
414 return ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
417 int ustctl_set_exclusion(int sock
, struct lttng_ust_event_exclusion
*exclusion
,
418 struct lttng_ust_object_data
*obj_data
)
420 struct ustcomm_ust_msg lum
;
421 struct ustcomm_ust_reply lur
;
428 memset(&lum
, 0, sizeof(lum
));
429 lum
.handle
= obj_data
->handle
;
430 lum
.cmd
= LTTNG_UST_EXCLUSION
;
431 lum
.u
.exclusion
.count
= exclusion
->count
;
433 ret
= ustcomm_send_app_msg(sock
, &lum
);
438 /* send var len exclusion names */
439 ret
= ustcomm_send_unix_sock(sock
,
441 exclusion
->count
* LTTNG_UST_SYM_NAME_LEN
);
445 if (ret
!= exclusion
->count
* LTTNG_UST_SYM_NAME_LEN
) {
448 return ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
451 /* Enable event, channel and session ioctl */
452 int ustctl_enable(int sock
, struct lttng_ust_object_data
*object
)
454 struct ustcomm_ust_msg lum
;
455 struct ustcomm_ust_reply lur
;
461 memset(&lum
, 0, sizeof(lum
));
462 lum
.handle
= object
->handle
;
463 lum
.cmd
= LTTNG_UST_ENABLE
;
464 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
467 DBG("enabled handle %u", object
->handle
);
471 /* Disable event, channel and session ioctl */
472 int ustctl_disable(int sock
, struct lttng_ust_object_data
*object
)
474 struct ustcomm_ust_msg lum
;
475 struct ustcomm_ust_reply lur
;
481 memset(&lum
, 0, sizeof(lum
));
482 lum
.handle
= object
->handle
;
483 lum
.cmd
= LTTNG_UST_DISABLE
;
484 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
487 DBG("disable handle %u", object
->handle
);
491 int ustctl_start_session(int sock
, int handle
)
493 struct lttng_ust_object_data obj
;
496 return ustctl_enable(sock
, &obj
);
499 int ustctl_stop_session(int sock
, int handle
)
501 struct lttng_ust_object_data obj
;
504 return ustctl_disable(sock
, &obj
);
507 int ustctl_create_event_notifier_group(int sock
, int pipe_fd
,
508 struct lttng_ust_object_data
**_event_notifier_group_data
)
510 struct lttng_ust_object_data
*event_notifier_group_data
;
511 struct ustcomm_ust_msg lum
;
512 struct ustcomm_ust_reply lur
;
516 if (!_event_notifier_group_data
)
519 event_notifier_group_data
= zmalloc(sizeof(*event_notifier_group_data
));
520 if (!event_notifier_group_data
)
523 event_notifier_group_data
->type
= LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP
;
525 memset(&lum
, 0, sizeof(lum
));
526 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
527 lum
.cmd
= LTTNG_UST_EVENT_NOTIFIER_GROUP_CREATE
;
529 ret
= ustcomm_send_app_msg(sock
, &lum
);
533 /* Send event_notifier notification pipe. */
534 len
= ustcomm_send_fds_unix_sock(sock
, &pipe_fd
, 1);
540 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
544 event_notifier_group_data
->handle
= lur
.ret_val
;
545 DBG("received event_notifier group handle %d", event_notifier_group_data
->handle
);
547 *_event_notifier_group_data
= event_notifier_group_data
;
552 free(event_notifier_group_data
);
558 int ustctl_create_event_notifier(int sock
, struct lttng_ust_event_notifier
*event_notifier
,
559 struct lttng_ust_object_data
*event_notifier_group
,
560 struct lttng_ust_object_data
**_event_notifier_data
)
562 struct ustcomm_ust_msg lum
;
563 struct ustcomm_ust_reply lur
;
564 struct lttng_ust_object_data
*event_notifier_data
;
567 if (!event_notifier_group
|| !_event_notifier_data
)
570 event_notifier_data
= zmalloc(sizeof(*event_notifier_data
));
571 if (!event_notifier_data
)
574 event_notifier_data
->type
= LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER
;
576 memset(&lum
, 0, sizeof(lum
));
577 lum
.handle
= event_notifier_group
->handle
;
578 lum
.cmd
= LTTNG_UST_EVENT_NOTIFIER_CREATE
;
580 strncpy(lum
.u
.event_notifier
.event
.name
, event_notifier
->event
.name
,
581 LTTNG_UST_SYM_NAME_LEN
);
582 lum
.u
.event_notifier
.event
.instrumentation
= event_notifier
->event
.instrumentation
;
583 lum
.u
.event_notifier
.event
.loglevel_type
= event_notifier
->event
.loglevel_type
;
584 lum
.u
.event_notifier
.event
.loglevel
= event_notifier
->event
.loglevel
;
585 lum
.u
.event_notifier
.event
.token
= event_notifier
->event
.token
;
586 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
588 free(event_notifier_data
);
591 event_notifier_data
->handle
= lur
.ret_val
;
592 DBG("received event_notifier handle %u", event_notifier_data
->handle
);
593 *_event_notifier_data
= event_notifier_data
;
598 int ustctl_tracepoint_list(int sock
)
600 struct ustcomm_ust_msg lum
;
601 struct ustcomm_ust_reply lur
;
602 int ret
, tp_list_handle
;
604 memset(&lum
, 0, sizeof(lum
));
605 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
606 lum
.cmd
= LTTNG_UST_TRACEPOINT_LIST
;
607 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
610 tp_list_handle
= lur
.ret_val
;
611 DBG("received tracepoint list handle %u", tp_list_handle
);
612 return tp_list_handle
;
615 int ustctl_tracepoint_list_get(int sock
, int tp_list_handle
,
616 struct lttng_ust_tracepoint_iter
*iter
)
618 struct ustcomm_ust_msg lum
;
619 struct ustcomm_ust_reply lur
;
625 memset(&lum
, 0, sizeof(lum
));
626 lum
.handle
= tp_list_handle
;
627 lum
.cmd
= LTTNG_UST_TRACEPOINT_LIST_GET
;
628 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
631 DBG("received tracepoint list entry name %s loglevel %d",
632 lur
.u
.tracepoint
.name
,
633 lur
.u
.tracepoint
.loglevel
);
634 memcpy(iter
, &lur
.u
.tracepoint
, sizeof(*iter
));
638 int ustctl_tracepoint_field_list(int sock
)
640 struct ustcomm_ust_msg lum
;
641 struct ustcomm_ust_reply lur
;
642 int ret
, tp_field_list_handle
;
644 memset(&lum
, 0, sizeof(lum
));
645 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
646 lum
.cmd
= LTTNG_UST_TRACEPOINT_FIELD_LIST
;
647 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
650 tp_field_list_handle
= lur
.ret_val
;
651 DBG("received tracepoint field list handle %u", tp_field_list_handle
);
652 return tp_field_list_handle
;
655 int ustctl_tracepoint_field_list_get(int sock
, int tp_field_list_handle
,
656 struct lttng_ust_field_iter
*iter
)
658 struct ustcomm_ust_msg lum
;
659 struct ustcomm_ust_reply lur
;
666 memset(&lum
, 0, sizeof(lum
));
667 lum
.handle
= tp_field_list_handle
;
668 lum
.cmd
= LTTNG_UST_TRACEPOINT_FIELD_LIST_GET
;
669 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
672 len
= ustcomm_recv_unix_sock(sock
, iter
, sizeof(*iter
));
673 if (len
!= sizeof(*iter
)) {
676 DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d",
684 int ustctl_tracer_version(int sock
, struct lttng_ust_tracer_version
*v
)
686 struct ustcomm_ust_msg lum
;
687 struct ustcomm_ust_reply lur
;
693 memset(&lum
, 0, sizeof(lum
));
694 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
695 lum
.cmd
= LTTNG_UST_TRACER_VERSION
;
696 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
699 memcpy(v
, &lur
.u
.version
, sizeof(*v
));
700 DBG("received tracer version");
704 int ustctl_wait_quiescent(int sock
)
706 struct ustcomm_ust_msg lum
;
707 struct ustcomm_ust_reply lur
;
710 memset(&lum
, 0, sizeof(lum
));
711 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
712 lum
.cmd
= LTTNG_UST_WAIT_QUIESCENT
;
713 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
716 DBG("waited for quiescent state");
720 int ustctl_calibrate(int sock
, struct lttng_ust_calibrate
*calibrate
)
728 int ustctl_sock_flush_buffer(int sock
, struct lttng_ust_object_data
*object
)
730 struct ustcomm_ust_msg lum
;
731 struct ustcomm_ust_reply lur
;
737 memset(&lum
, 0, sizeof(lum
));
738 lum
.handle
= object
->handle
;
739 lum
.cmd
= LTTNG_UST_FLUSH_BUFFER
;
740 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
743 DBG("flushed buffer handle %u", object
->handle
);
748 int ustctl_send_channel(int sock
,
749 enum lttng_ust_chan_type type
,
759 len
= ustcomm_send_unix_sock(sock
, &size
, sizeof(size
));
760 if (len
!= sizeof(size
)) {
767 /* Send channel type */
768 len
= ustcomm_send_unix_sock(sock
, &type
, sizeof(type
));
769 if (len
!= sizeof(type
)) {
777 /* Send channel data */
778 len
= ustcomm_send_unix_sock(sock
, data
, size
);
787 len
= ustcomm_send_fds_unix_sock(sock
, &wakeup_fd
, 1);
798 int ustctl_send_stream(int sock
,
800 uint64_t memory_map_size
,
801 int shm_fd
, int wakeup_fd
,
809 /* finish iteration */
812 len
= ustcomm_send_unix_sock(sock
, &v
, sizeof(v
));
813 if (len
!= sizeof(v
)) {
823 len
= ustcomm_send_unix_sock(sock
, &memory_map_size
,
824 sizeof(memory_map_size
));
825 if (len
!= sizeof(memory_map_size
)) {
833 len
= ustcomm_send_unix_sock(sock
, &stream_nr
,
835 if (len
!= sizeof(stream_nr
)) {
843 /* Send shm fd and wakeup fd */
846 len
= ustcomm_send_fds_unix_sock(sock
, fds
, 2);
856 int ustctl_recv_channel_from_consumer(int sock
,
857 struct lttng_ust_object_data
**_channel_data
)
859 struct lttng_ust_object_data
*channel_data
;
864 channel_data
= zmalloc(sizeof(*channel_data
));
869 channel_data
->type
= LTTNG_UST_OBJECT_TYPE_CHANNEL
;
870 channel_data
->handle
= -1;
873 len
= ustcomm_recv_unix_sock(sock
, &channel_data
->size
,
874 sizeof(channel_data
->size
));
875 if (len
!= sizeof(channel_data
->size
)) {
883 /* recv channel type */
884 len
= ustcomm_recv_unix_sock(sock
, &channel_data
->u
.channel
.type
,
885 sizeof(channel_data
->u
.channel
.type
));
886 if (len
!= sizeof(channel_data
->u
.channel
.type
)) {
894 /* recv channel data */
895 channel_data
->u
.channel
.data
= zmalloc(channel_data
->size
);
896 if (!channel_data
->u
.channel
.data
) {
900 len
= ustcomm_recv_unix_sock(sock
, channel_data
->u
.channel
.data
,
902 if (len
!= channel_data
->size
) {
907 goto error_recv_data
;
910 len
= ustcomm_recv_fds_unix_sock(sock
, &wakeup_fd
, 1);
914 goto error_recv_data
;
917 goto error_recv_data
;
920 channel_data
->u
.channel
.wakeup_fd
= wakeup_fd
;
921 *_channel_data
= channel_data
;
925 free(channel_data
->u
.channel
.data
);
932 int ustctl_recv_stream_from_consumer(int sock
,
933 struct lttng_ust_object_data
**_stream_data
)
935 struct lttng_ust_object_data
*stream_data
;
940 stream_data
= zmalloc(sizeof(*stream_data
));
946 stream_data
->type
= LTTNG_UST_OBJECT_TYPE_STREAM
;
947 stream_data
->handle
= -1;
950 len
= ustcomm_recv_unix_sock(sock
, &stream_data
->size
,
951 sizeof(stream_data
->size
));
952 if (len
!= sizeof(stream_data
->size
)) {
959 if (stream_data
->size
== -1) {
960 ret
= -LTTNG_UST_ERR_NOENT
;
965 len
= ustcomm_recv_unix_sock(sock
, &stream_data
->u
.stream
.stream_nr
,
966 sizeof(stream_data
->u
.stream
.stream_nr
));
967 if (len
!= sizeof(stream_data
->u
.stream
.stream_nr
)) {
975 /* recv shm fd and wakeup fd */
976 len
= ustcomm_recv_fds_unix_sock(sock
, fds
, 2);
986 stream_data
->u
.stream
.shm_fd
= fds
[0];
987 stream_data
->u
.stream
.wakeup_fd
= fds
[1];
988 *_stream_data
= stream_data
;
997 int ustctl_send_channel_to_ust(int sock
, int session_handle
,
998 struct lttng_ust_object_data
*channel_data
)
1000 struct ustcomm_ust_msg lum
;
1001 struct ustcomm_ust_reply lur
;
1007 memset(&lum
, 0, sizeof(lum
));
1008 lum
.handle
= session_handle
;
1009 lum
.cmd
= LTTNG_UST_CHANNEL
;
1010 lum
.u
.channel
.len
= channel_data
->size
;
1011 lum
.u
.channel
.type
= channel_data
->u
.channel
.type
;
1012 ret
= ustcomm_send_app_msg(sock
, &lum
);
1016 ret
= ustctl_send_channel(sock
,
1017 channel_data
->u
.channel
.type
,
1018 channel_data
->u
.channel
.data
,
1020 channel_data
->u
.channel
.wakeup_fd
,
1024 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
1026 channel_data
->handle
= lur
.ret_val
;
1031 int ustctl_send_stream_to_ust(int sock
,
1032 struct lttng_ust_object_data
*channel_data
,
1033 struct lttng_ust_object_data
*stream_data
)
1035 struct ustcomm_ust_msg lum
;
1036 struct ustcomm_ust_reply lur
;
1039 memset(&lum
, 0, sizeof(lum
));
1040 lum
.handle
= channel_data
->handle
;
1041 lum
.cmd
= LTTNG_UST_STREAM
;
1042 lum
.u
.stream
.len
= stream_data
->size
;
1043 lum
.u
.stream
.stream_nr
= stream_data
->u
.stream
.stream_nr
;
1044 ret
= ustcomm_send_app_msg(sock
, &lum
);
1048 assert(stream_data
);
1049 assert(stream_data
->type
== LTTNG_UST_OBJECT_TYPE_STREAM
);
1051 ret
= ustctl_send_stream(sock
,
1052 stream_data
->u
.stream
.stream_nr
,
1054 stream_data
->u
.stream
.shm_fd
,
1055 stream_data
->u
.stream
.wakeup_fd
, 1);
1058 return ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
1061 int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data
**dest
,
1062 struct lttng_ust_object_data
*src
)
1064 struct lttng_ust_object_data
*obj
;
1067 if (src
->handle
!= -1) {
1072 obj
= zmalloc(sizeof(*obj
));
1078 obj
->type
= src
->type
;
1079 obj
->handle
= src
->handle
;
1080 obj
->size
= src
->size
;
1082 switch (obj
->type
) {
1083 case LTTNG_UST_OBJECT_TYPE_CHANNEL
:
1085 obj
->u
.channel
.type
= src
->u
.channel
.type
;
1086 if (src
->u
.channel
.wakeup_fd
>= 0) {
1087 obj
->u
.channel
.wakeup_fd
=
1088 dup(src
->u
.channel
.wakeup_fd
);
1089 if (obj
->u
.channel
.wakeup_fd
< 0) {
1091 goto chan_error_wakeup_fd
;
1094 obj
->u
.channel
.wakeup_fd
=
1095 src
->u
.channel
.wakeup_fd
;
1097 obj
->u
.channel
.data
= zmalloc(obj
->size
);
1098 if (!obj
->u
.channel
.data
) {
1100 goto chan_error_alloc
;
1102 memcpy(obj
->u
.channel
.data
, src
->u
.channel
.data
, obj
->size
);
1106 if (src
->u
.channel
.wakeup_fd
>= 0) {
1109 closeret
= close(obj
->u
.channel
.wakeup_fd
);
1114 chan_error_wakeup_fd
:
1119 case LTTNG_UST_OBJECT_TYPE_STREAM
:
1121 obj
->u
.stream
.stream_nr
= src
->u
.stream
.stream_nr
;
1122 if (src
->u
.stream
.wakeup_fd
>= 0) {
1123 obj
->u
.stream
.wakeup_fd
=
1124 dup(src
->u
.stream
.wakeup_fd
);
1125 if (obj
->u
.stream
.wakeup_fd
< 0) {
1127 goto stream_error_wakeup_fd
;
1130 obj
->u
.stream
.wakeup_fd
=
1131 src
->u
.stream
.wakeup_fd
;
1134 if (src
->u
.stream
.shm_fd
>= 0) {
1135 obj
->u
.stream
.shm_fd
=
1136 dup(src
->u
.stream
.shm_fd
);
1137 if (obj
->u
.stream
.shm_fd
< 0) {
1139 goto stream_error_shm_fd
;
1142 obj
->u
.stream
.shm_fd
=
1143 src
->u
.stream
.shm_fd
;
1147 stream_error_shm_fd
:
1148 if (src
->u
.stream
.wakeup_fd
>= 0) {
1151 closeret
= close(obj
->u
.stream
.wakeup_fd
);
1156 stream_error_wakeup_fd
:
1160 case LTTNG_UST_OBJECT_TYPE_COUNTER
:
1162 obj
->u
.counter
.data
= zmalloc(obj
->size
);
1163 if (!obj
->u
.counter
.data
) {
1167 memcpy(obj
->u
.counter
.data
, src
->u
.counter
.data
, obj
->size
);
1171 case LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL
:
1173 if (src
->u
.counter_global
.shm_fd
>= 0) {
1174 obj
->u
.counter_global
.shm_fd
=
1175 dup(src
->u
.counter_global
.shm_fd
);
1176 if (obj
->u
.counter_global
.shm_fd
< 0) {
1184 case LTTNG_UST_OBJECT_TYPE_COUNTER_CPU
:
1186 obj
->u
.counter_cpu
.cpu_nr
= src
->u
.counter_cpu
.cpu_nr
;
1187 if (src
->u
.counter_cpu
.shm_fd
>= 0) {
1188 obj
->u
.counter_cpu
.shm_fd
=
1189 dup(src
->u
.counter_cpu
.shm_fd
);
1190 if (obj
->u
.counter_cpu
.shm_fd
< 0) {
1213 /* Buffer operations */
1215 int ustctl_get_nr_stream_per_channel(void)
1217 return num_possible_cpus();
1220 struct ustctl_consumer_channel
*
1221 ustctl_create_channel(struct ustctl_consumer_channel_attr
*attr
,
1222 const int *stream_fds
, int nr_stream_fds
)
1224 struct ustctl_consumer_channel
*chan
;
1225 const char *transport_name
;
1226 struct lttng_transport
*transport
;
1228 switch (attr
->type
) {
1229 case LTTNG_UST_CHAN_PER_CPU
:
1230 if (attr
->output
== LTTNG_UST_MMAP
) {
1231 if (attr
->overwrite
) {
1232 if (attr
->read_timer_interval
== 0) {
1233 transport_name
= "relay-overwrite-mmap";
1235 transport_name
= "relay-overwrite-rt-mmap";
1238 if (attr
->read_timer_interval
== 0) {
1239 transport_name
= "relay-discard-mmap";
1241 transport_name
= "relay-discard-rt-mmap";
1248 case LTTNG_UST_CHAN_METADATA
:
1249 if (attr
->output
== LTTNG_UST_MMAP
)
1250 transport_name
= "relay-metadata-mmap";
1255 transport_name
= "<unknown>";
1259 transport
= lttng_transport_find(transport_name
);
1261 DBG("LTTng transport %s not found\n",
1266 chan
= zmalloc(sizeof(*chan
));
1270 chan
->chan
= transport
->ops
.channel_create(transport_name
, NULL
,
1271 attr
->subbuf_size
, attr
->num_subbuf
,
1272 attr
->switch_timer_interval
,
1273 attr
->read_timer_interval
,
1274 attr
->uuid
, attr
->chan_id
,
1275 stream_fds
, nr_stream_fds
,
1276 attr
->blocking_timeout
);
1280 chan
->chan
->ops
= &transport
->ops
;
1281 memcpy(&chan
->attr
, attr
, sizeof(chan
->attr
));
1282 chan
->wait_fd
= ustctl_channel_get_wait_fd(chan
);
1283 chan
->wakeup_fd
= ustctl_channel_get_wakeup_fd(chan
);
1291 void ustctl_destroy_channel(struct ustctl_consumer_channel
*chan
)
1293 (void) ustctl_channel_close_wait_fd(chan
);
1294 (void) ustctl_channel_close_wakeup_fd(chan
);
1295 chan
->chan
->ops
->channel_destroy(chan
->chan
);
1299 int ustctl_send_channel_to_sessiond(int sock
,
1300 struct ustctl_consumer_channel
*channel
)
1302 struct shm_object_table
*table
;
1304 table
= channel
->chan
->handle
->table
;
1305 if (table
->size
<= 0)
1307 return ustctl_send_channel(sock
,
1309 table
->objects
[0].memory_map
,
1310 table
->objects
[0].memory_map_size
,
1315 int ustctl_send_stream_to_sessiond(int sock
,
1316 struct ustctl_consumer_stream
*stream
)
1319 return ustctl_send_stream(sock
, -1U, -1U, -1, -1, 0);
1321 return ustctl_send_stream(sock
,
1323 stream
->memory_map_size
,
1324 stream
->shm_fd
, stream
->wakeup_fd
,
1328 int ustctl_write_metadata_to_channel(
1329 struct ustctl_consumer_channel
*channel
,
1330 const char *metadata_str
, /* NOT null-terminated */
1331 size_t len
) /* metadata length */
1333 struct lttng_ust_lib_ring_buffer_ctx ctx
;
1334 struct lttng_channel
*chan
= channel
->chan
;
1335 const char *str
= metadata_str
;
1336 int ret
= 0, waitret
;
1337 size_t reserve_len
, pos
;
1339 for (pos
= 0; pos
< len
; pos
+= reserve_len
) {
1340 reserve_len
= min_t(size_t,
1341 chan
->ops
->packet_avail_size(chan
->chan
, chan
->handle
),
1343 lib_ring_buffer_ctx_init(&ctx
, chan
->chan
, NULL
, reserve_len
,
1344 sizeof(char), -1, chan
->handle
, NULL
);
1346 * We don't care about metadata buffer's records lost
1347 * count, because we always retry here. Report error if
1348 * we need to bail out after timeout or being
1351 waitret
= wait_cond_interruptible_timeout(
1353 ret
= chan
->ops
->event_reserve(&ctx
, 0);
1354 ret
!= -ENOBUFS
|| !ret
;
1356 LTTNG_METADATA_TIMEOUT_MSEC
);
1357 if (waitret
== -ETIMEDOUT
|| waitret
== -EINTR
|| ret
) {
1358 DBG("LTTng: Failure to write metadata to buffers (%s)\n",
1359 waitret
== -EINTR
? "interrupted" :
1360 (ret
== -ENOBUFS
? "timeout" : "I/O error"));
1361 if (waitret
== -EINTR
)
1365 chan
->ops
->event_write(&ctx
, &str
[pos
], reserve_len
);
1366 chan
->ops
->event_commit(&ctx
);
1373 * Write at most one packet in the channel.
1374 * Returns the number of bytes written on success, < 0 on error.
1376 ssize_t
ustctl_write_one_packet_to_channel(
1377 struct ustctl_consumer_channel
*channel
,
1378 const char *metadata_str
, /* NOT null-terminated */
1379 size_t len
) /* metadata length */
1381 struct lttng_ust_lib_ring_buffer_ctx ctx
;
1382 struct lttng_channel
*chan
= channel
->chan
;
1383 const char *str
= metadata_str
;
1384 ssize_t reserve_len
;
1387 reserve_len
= min_t(ssize_t
,
1388 chan
->ops
->packet_avail_size(chan
->chan
, chan
->handle
),
1390 lib_ring_buffer_ctx_init(&ctx
, chan
->chan
, NULL
, reserve_len
,
1391 sizeof(char), -1, chan
->handle
, NULL
);
1392 ret
= chan
->ops
->event_reserve(&ctx
, 0);
1394 DBG("LTTng: event reservation failed");
1399 chan
->ops
->event_write(&ctx
, str
, reserve_len
);
1400 chan
->ops
->event_commit(&ctx
);
1406 int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel
*consumer_chan
)
1408 struct channel
*chan
;
1411 chan
= consumer_chan
->chan
->chan
;
1412 ret
= ring_buffer_channel_close_wait_fd(&chan
->backend
.config
,
1413 chan
, chan
->handle
);
1415 consumer_chan
->wait_fd
= -1;
1419 int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel
*consumer_chan
)
1421 struct channel
*chan
;
1424 chan
= consumer_chan
->chan
->chan
;
1425 ret
= ring_buffer_channel_close_wakeup_fd(&chan
->backend
.config
,
1426 chan
, chan
->handle
);
1428 consumer_chan
->wakeup_fd
= -1;
1432 int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream
*stream
)
1434 struct channel
*chan
;
1436 chan
= stream
->chan
->chan
->chan
;
1437 return ring_buffer_stream_close_wait_fd(&chan
->backend
.config
,
1438 chan
, stream
->handle
, stream
->cpu
);
1441 int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream
*stream
)
1443 struct channel
*chan
;
1445 chan
= stream
->chan
->chan
->chan
;
1446 return ring_buffer_stream_close_wakeup_fd(&chan
->backend
.config
,
1447 chan
, stream
->handle
, stream
->cpu
);
1450 struct ustctl_consumer_stream
*
1451 ustctl_create_stream(struct ustctl_consumer_channel
*channel
,
1454 struct ustctl_consumer_stream
*stream
;
1455 struct lttng_ust_shm_handle
*handle
;
1456 struct channel
*chan
;
1457 int shm_fd
, wait_fd
, wakeup_fd
;
1458 uint64_t memory_map_size
;
1459 struct lttng_ust_lib_ring_buffer
*buf
;
1464 handle
= channel
->chan
->handle
;
1468 chan
= channel
->chan
->chan
;
1469 buf
= channel_get_ring_buffer(&chan
->backend
.config
,
1470 chan
, cpu
, handle
, &shm_fd
, &wait_fd
,
1471 &wakeup_fd
, &memory_map_size
);
1474 ret
= lib_ring_buffer_open_read(buf
, handle
);
1478 stream
= zmalloc(sizeof(*stream
));
1481 stream
->handle
= handle
;
1483 stream
->chan
= channel
;
1484 stream
->shm_fd
= shm_fd
;
1485 stream
->wait_fd
= wait_fd
;
1486 stream
->wakeup_fd
= wakeup_fd
;
1487 stream
->memory_map_size
= memory_map_size
;
1495 void ustctl_destroy_stream(struct ustctl_consumer_stream
*stream
)
1497 struct lttng_ust_lib_ring_buffer
*buf
;
1498 struct ustctl_consumer_channel
*consumer_chan
;
1502 consumer_chan
= stream
->chan
;
1503 (void) ustctl_stream_close_wait_fd(stream
);
1504 (void) ustctl_stream_close_wakeup_fd(stream
);
1505 lib_ring_buffer_release_read(buf
, consumer_chan
->chan
->handle
);
1509 int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel
*chan
)
1513 return shm_get_wait_fd(chan
->chan
->handle
,
1514 &chan
->chan
->handle
->chan
._ref
);
1517 int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel
*chan
)
1521 return shm_get_wakeup_fd(chan
->chan
->handle
,
1522 &chan
->chan
->handle
->chan
._ref
);
1525 int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream
*stream
)
1527 struct lttng_ust_lib_ring_buffer
*buf
;
1528 struct ustctl_consumer_channel
*consumer_chan
;
1533 consumer_chan
= stream
->chan
;
1534 return shm_get_wait_fd(consumer_chan
->chan
->handle
, &buf
->self
._ref
);
1537 int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream
*stream
)
1539 struct lttng_ust_lib_ring_buffer
*buf
;
1540 struct ustctl_consumer_channel
*consumer_chan
;
1545 consumer_chan
= stream
->chan
;
1546 return shm_get_wakeup_fd(consumer_chan
->chan
->handle
, &buf
->self
._ref
);
1549 /* For mmap mode, readable without "get" operation */
1551 void *ustctl_get_mmap_base(struct ustctl_consumer_stream
*stream
)
1553 struct lttng_ust_lib_ring_buffer
*buf
;
1554 struct ustctl_consumer_channel
*consumer_chan
;
1559 consumer_chan
= stream
->chan
;
1560 return shmp(consumer_chan
->chan
->handle
, buf
->backend
.memory_map
);
1563 /* returns the length to mmap. */
1564 int ustctl_get_mmap_len(struct ustctl_consumer_stream
*stream
,
1567 struct ustctl_consumer_channel
*consumer_chan
;
1568 unsigned long mmap_buf_len
;
1569 struct channel
*chan
;
1573 consumer_chan
= stream
->chan
;
1574 chan
= consumer_chan
->chan
->chan
;
1575 if (chan
->backend
.config
.output
!= RING_BUFFER_MMAP
)
1577 mmap_buf_len
= chan
->backend
.buf_size
;
1578 if (chan
->backend
.extra_reader_sb
)
1579 mmap_buf_len
+= chan
->backend
.subbuf_size
;
1580 if (mmap_buf_len
> INT_MAX
)
1582 *len
= mmap_buf_len
;
1586 /* returns the maximum size for sub-buffers. */
1587 int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream
*stream
,
1590 struct ustctl_consumer_channel
*consumer_chan
;
1591 struct channel
*chan
;
1595 consumer_chan
= stream
->chan
;
1596 chan
= consumer_chan
->chan
->chan
;
1597 *len
= chan
->backend
.subbuf_size
;
1602 * For mmap mode, operate on the current packet (between get/put or
1603 * get_next/put_next).
1606 /* returns the offset of the subbuffer belonging to the mmap reader. */
1607 int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream
*stream
,
1610 struct channel
*chan
;
1611 unsigned long sb_bindex
;
1612 struct lttng_ust_lib_ring_buffer
*buf
;
1613 struct ustctl_consumer_channel
*consumer_chan
;
1614 struct lttng_ust_lib_ring_buffer_backend_pages_shmp
*barray_idx
;
1615 struct lttng_ust_lib_ring_buffer_backend_pages
*pages
;
1620 consumer_chan
= stream
->chan
;
1621 chan
= consumer_chan
->chan
->chan
;
1622 if (chan
->backend
.config
.output
!= RING_BUFFER_MMAP
)
1624 sb_bindex
= subbuffer_id_get_index(&chan
->backend
.config
,
1625 buf
->backend
.buf_rsb
.id
);
1626 barray_idx
= shmp_index(consumer_chan
->chan
->handle
, buf
->backend
.array
,
1630 pages
= shmp(consumer_chan
->chan
->handle
, barray_idx
->shmp
);
1633 *off
= pages
->mmap_offset
;
1637 /* returns the size of the current sub-buffer, without padding (for mmap). */
1638 int ustctl_get_subbuf_size(struct ustctl_consumer_stream
*stream
,
1641 struct ustctl_consumer_channel
*consumer_chan
;
1642 struct channel
*chan
;
1643 struct lttng_ust_lib_ring_buffer
*buf
;
1649 consumer_chan
= stream
->chan
;
1650 chan
= consumer_chan
->chan
->chan
;
1651 *len
= lib_ring_buffer_get_read_data_size(&chan
->backend
.config
, buf
,
1652 consumer_chan
->chan
->handle
);
1656 /* returns the size of the current sub-buffer, without padding (for mmap). */
1657 int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream
*stream
,
1660 struct ustctl_consumer_channel
*consumer_chan
;
1661 struct channel
*chan
;
1662 struct lttng_ust_lib_ring_buffer
*buf
;
1667 consumer_chan
= stream
->chan
;
1668 chan
= consumer_chan
->chan
->chan
;
1669 *len
= lib_ring_buffer_get_read_data_size(&chan
->backend
.config
, buf
,
1670 consumer_chan
->chan
->handle
);
1671 *len
= LTTNG_UST_PAGE_ALIGN(*len
);
1675 /* Get exclusive read access to the next sub-buffer that can be read. */
1676 int ustctl_get_next_subbuf(struct ustctl_consumer_stream
*stream
)
1678 struct lttng_ust_lib_ring_buffer
*buf
;
1679 struct ustctl_consumer_channel
*consumer_chan
;
1684 consumer_chan
= stream
->chan
;
1685 return lib_ring_buffer_get_next_subbuf(buf
,
1686 consumer_chan
->chan
->handle
);
1690 /* Release exclusive sub-buffer access, move consumer forward. */
1691 int ustctl_put_next_subbuf(struct ustctl_consumer_stream
*stream
)
1693 struct lttng_ust_lib_ring_buffer
*buf
;
1694 struct ustctl_consumer_channel
*consumer_chan
;
1699 consumer_chan
= stream
->chan
;
1700 lib_ring_buffer_put_next_subbuf(buf
, consumer_chan
->chan
->handle
);
1706 /* Get a snapshot of the current ring buffer producer and consumer positions */
1707 int ustctl_snapshot(struct ustctl_consumer_stream
*stream
)
1709 struct lttng_ust_lib_ring_buffer
*buf
;
1710 struct ustctl_consumer_channel
*consumer_chan
;
1715 consumer_chan
= stream
->chan
;
1716 return lib_ring_buffer_snapshot(buf
, &buf
->cons_snapshot
,
1717 &buf
->prod_snapshot
, consumer_chan
->chan
->handle
);
1721 * Get a snapshot of the current ring buffer producer and consumer positions
1722 * even if the consumed and produced positions are contained within the same
1725 int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream
*stream
)
1727 struct lttng_ust_lib_ring_buffer
*buf
;
1728 struct ustctl_consumer_channel
*consumer_chan
;
1733 consumer_chan
= stream
->chan
;
1734 return lib_ring_buffer_snapshot_sample_positions(buf
,
1735 &buf
->cons_snapshot
, &buf
->prod_snapshot
,
1736 consumer_chan
->chan
->handle
);
1739 /* Get the consumer position (iteration start) */
1740 int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream
*stream
,
1743 struct lttng_ust_lib_ring_buffer
*buf
;
1748 *pos
= buf
->cons_snapshot
;
1752 /* Get the producer position (iteration end) */
1753 int ustctl_snapshot_get_produced(struct ustctl_consumer_stream
*stream
,
1756 struct lttng_ust_lib_ring_buffer
*buf
;
1761 *pos
= buf
->prod_snapshot
;
1765 /* Get exclusive read access to the specified sub-buffer position */
1766 int ustctl_get_subbuf(struct ustctl_consumer_stream
*stream
,
1769 struct lttng_ust_lib_ring_buffer
*buf
;
1770 struct ustctl_consumer_channel
*consumer_chan
;
1775 consumer_chan
= stream
->chan
;
1776 return lib_ring_buffer_get_subbuf(buf
, *pos
,
1777 consumer_chan
->chan
->handle
);
1780 /* Release exclusive sub-buffer access */
1781 int ustctl_put_subbuf(struct ustctl_consumer_stream
*stream
)
1783 struct lttng_ust_lib_ring_buffer
*buf
;
1784 struct ustctl_consumer_channel
*consumer_chan
;
1789 consumer_chan
= stream
->chan
;
1790 lib_ring_buffer_put_subbuf(buf
, consumer_chan
->chan
->handle
);
1794 void ustctl_flush_buffer(struct ustctl_consumer_stream
*stream
,
1795 int producer_active
)
1797 struct lttng_ust_lib_ring_buffer
*buf
;
1798 struct ustctl_consumer_channel
*consumer_chan
;
1802 consumer_chan
= stream
->chan
;
1803 lib_ring_buffer_switch_slow(buf
,
1804 producer_active
? SWITCH_ACTIVE
: SWITCH_FLUSH
,
1805 consumer_chan
->chan
->handle
);
1808 void ustctl_clear_buffer(struct ustctl_consumer_stream
*stream
)
1810 struct lttng_ust_lib_ring_buffer
*buf
;
1811 struct ustctl_consumer_channel
*consumer_chan
;
1815 consumer_chan
= stream
->chan
;
1816 lib_ring_buffer_switch_slow(buf
, SWITCH_ACTIVE
,
1817 consumer_chan
->chan
->handle
);
1818 lib_ring_buffer_clear_reader(buf
, consumer_chan
->chan
->handle
);
1822 struct lttng_ust_client_lib_ring_buffer_client_cb
*get_client_cb(
1823 struct lttng_ust_lib_ring_buffer
*buf
,
1824 struct lttng_ust_shm_handle
*handle
)
1826 struct channel
*chan
;
1827 const struct lttng_ust_lib_ring_buffer_config
*config
;
1828 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1830 chan
= shmp(handle
, buf
->backend
.chan
);
1833 config
= &chan
->backend
.config
;
1834 if (!config
->cb_ptr
)
1836 client_cb
= caa_container_of(config
->cb_ptr
,
1837 struct lttng_ust_client_lib_ring_buffer_client_cb
,
1842 int ustctl_get_timestamp_begin(struct ustctl_consumer_stream
*stream
,
1843 uint64_t *timestamp_begin
)
1845 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1846 struct lttng_ust_lib_ring_buffer
*buf
;
1847 struct lttng_ust_shm_handle
*handle
;
1849 if (!stream
|| !timestamp_begin
)
1852 handle
= stream
->chan
->chan
->handle
;
1853 client_cb
= get_client_cb(buf
, handle
);
1856 return client_cb
->timestamp_begin(buf
, handle
, timestamp_begin
);
1859 int ustctl_get_timestamp_end(struct ustctl_consumer_stream
*stream
,
1860 uint64_t *timestamp_end
)
1862 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1863 struct lttng_ust_lib_ring_buffer
*buf
;
1864 struct lttng_ust_shm_handle
*handle
;
1866 if (!stream
|| !timestamp_end
)
1869 handle
= stream
->chan
->chan
->handle
;
1870 client_cb
= get_client_cb(buf
, handle
);
1873 return client_cb
->timestamp_end(buf
, handle
, timestamp_end
);
1876 int ustctl_get_events_discarded(struct ustctl_consumer_stream
*stream
,
1877 uint64_t *events_discarded
)
1879 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1880 struct lttng_ust_lib_ring_buffer
*buf
;
1881 struct lttng_ust_shm_handle
*handle
;
1883 if (!stream
|| !events_discarded
)
1886 handle
= stream
->chan
->chan
->handle
;
1887 client_cb
= get_client_cb(buf
, handle
);
1890 return client_cb
->events_discarded(buf
, handle
, events_discarded
);
1893 int ustctl_get_content_size(struct ustctl_consumer_stream
*stream
,
1894 uint64_t *content_size
)
1896 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1897 struct lttng_ust_lib_ring_buffer
*buf
;
1898 struct lttng_ust_shm_handle
*handle
;
1900 if (!stream
|| !content_size
)
1903 handle
= stream
->chan
->chan
->handle
;
1904 client_cb
= get_client_cb(buf
, handle
);
1907 return client_cb
->content_size(buf
, handle
, content_size
);
1910 int ustctl_get_packet_size(struct ustctl_consumer_stream
*stream
,
1911 uint64_t *packet_size
)
1913 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1914 struct lttng_ust_lib_ring_buffer
*buf
;
1915 struct lttng_ust_shm_handle
*handle
;
1917 if (!stream
|| !packet_size
)
1920 handle
= stream
->chan
->chan
->handle
;
1921 client_cb
= get_client_cb(buf
, handle
);
1924 return client_cb
->packet_size(buf
, handle
, packet_size
);
1927 int ustctl_get_stream_id(struct ustctl_consumer_stream
*stream
,
1928 uint64_t *stream_id
)
1930 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1931 struct lttng_ust_lib_ring_buffer
*buf
;
1932 struct lttng_ust_shm_handle
*handle
;
1934 if (!stream
|| !stream_id
)
1937 handle
= stream
->chan
->chan
->handle
;
1938 client_cb
= get_client_cb(buf
, handle
);
1941 return client_cb
->stream_id(buf
, handle
, stream_id
);
1944 int ustctl_get_current_timestamp(struct ustctl_consumer_stream
*stream
,
1947 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1948 struct lttng_ust_lib_ring_buffer
*buf
;
1949 struct lttng_ust_shm_handle
*handle
;
1954 handle
= stream
->chan
->chan
->handle
;
1955 client_cb
= get_client_cb(buf
, handle
);
1956 if (!client_cb
|| !client_cb
->current_timestamp
)
1958 return client_cb
->current_timestamp(buf
, handle
, ts
);
1961 int ustctl_get_sequence_number(struct ustctl_consumer_stream
*stream
,
1964 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1965 struct lttng_ust_lib_ring_buffer
*buf
;
1966 struct lttng_ust_shm_handle
*handle
;
1968 if (!stream
|| !seq
)
1971 handle
= stream
->chan
->chan
->handle
;
1972 client_cb
= get_client_cb(buf
, handle
);
1973 if (!client_cb
|| !client_cb
->sequence_number
)
1975 return client_cb
->sequence_number(buf
, handle
, seq
);
1978 int ustctl_get_instance_id(struct ustctl_consumer_stream
*stream
,
1981 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1982 struct lttng_ust_lib_ring_buffer
*buf
;
1983 struct lttng_ust_shm_handle
*handle
;
1988 handle
= stream
->chan
->chan
->handle
;
1989 client_cb
= get_client_cb(buf
, handle
);
1992 return client_cb
->instance_id(buf
, handle
, id
);
1995 #ifdef LTTNG_UST_HAVE_PERF_EVENT
1997 int ustctl_has_perf_counters(void)
2004 int ustctl_has_perf_counters(void)
2012 * Returns 0 on success, negative error value on error.
2014 int ustctl_recv_reg_msg(int sock
,
2015 enum ustctl_socket_type
*type
,
2022 uint32_t *bits_per_long
,
2023 uint32_t *uint8_t_alignment
,
2024 uint32_t *uint16_t_alignment
,
2025 uint32_t *uint32_t_alignment
,
2026 uint32_t *uint64_t_alignment
,
2027 uint32_t *long_alignment
,
2032 struct ustctl_reg_msg reg_msg
;
2034 len
= ustcomm_recv_unix_sock(sock
, ®_msg
, sizeof(reg_msg
));
2035 if (len
> 0 && len
!= sizeof(reg_msg
))
2042 if (reg_msg
.magic
== LTTNG_UST_COMM_MAGIC
) {
2043 *byte_order
= BYTE_ORDER
== BIG_ENDIAN
?
2044 BIG_ENDIAN
: LITTLE_ENDIAN
;
2045 } else if (reg_msg
.magic
== bswap_32(LTTNG_UST_COMM_MAGIC
)) {
2046 *byte_order
= BYTE_ORDER
== BIG_ENDIAN
?
2047 LITTLE_ENDIAN
: BIG_ENDIAN
;
2049 return -LTTNG_UST_ERR_INVAL_MAGIC
;
2051 switch (reg_msg
.socket_type
) {
2052 case 0: *type
= USTCTL_SOCKET_CMD
;
2054 case 1: *type
= USTCTL_SOCKET_NOTIFY
;
2057 return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE
;
2059 *major
= reg_msg
.major
;
2060 *minor
= reg_msg
.minor
;
2062 *ppid
= reg_msg
.ppid
;
2065 *bits_per_long
= reg_msg
.bits_per_long
;
2066 *uint8_t_alignment
= reg_msg
.uint8_t_alignment
;
2067 *uint16_t_alignment
= reg_msg
.uint16_t_alignment
;
2068 *uint32_t_alignment
= reg_msg
.uint32_t_alignment
;
2069 *uint64_t_alignment
= reg_msg
.uint64_t_alignment
;
2070 *long_alignment
= reg_msg
.long_alignment
;
2071 memcpy(name
, reg_msg
.name
, LTTNG_UST_ABI_PROCNAME_LEN
);
2072 if (reg_msg
.major
< LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE
||
2073 reg_msg
.major
> LTTNG_UST_ABI_MAJOR_VERSION
) {
2074 return -LTTNG_UST_ERR_UNSUP_MAJOR
;
2080 int ustctl_recv_notify(int sock
, enum ustctl_notify_cmd
*notify_cmd
)
2082 struct ustcomm_notify_hdr header
;
2085 len
= ustcomm_recv_unix_sock(sock
, &header
, sizeof(header
));
2086 if (len
> 0 && len
!= sizeof(header
))
2092 switch (header
.notify_cmd
) {
2094 *notify_cmd
= USTCTL_NOTIFY_CMD_EVENT
;
2097 *notify_cmd
= USTCTL_NOTIFY_CMD_CHANNEL
;
2100 *notify_cmd
= USTCTL_NOTIFY_CMD_ENUM
;
2109 * Returns 0 on success, negative error value on error.
2111 int ustctl_recv_register_event(int sock
,
2118 struct ustctl_field
**fields
,
2119 char **model_emf_uri
)
2122 struct ustcomm_notify_event_msg msg
;
2123 size_t signature_len
, fields_len
, model_emf_uri_len
;
2124 char *a_sign
= NULL
, *a_model_emf_uri
= NULL
;
2125 struct ustctl_field
*a_fields
= NULL
;
2127 len
= ustcomm_recv_unix_sock(sock
, &msg
, sizeof(msg
));
2128 if (len
> 0 && len
!= sizeof(msg
))
2135 *session_objd
= msg
.session_objd
;
2136 *channel_objd
= msg
.channel_objd
;
2137 strncpy(event_name
, msg
.event_name
, LTTNG_UST_SYM_NAME_LEN
);
2138 event_name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
2139 *loglevel
= msg
.loglevel
;
2140 signature_len
= msg
.signature_len
;
2141 fields_len
= msg
.fields_len
;
2143 if (fields_len
% sizeof(*a_fields
) != 0) {
2147 model_emf_uri_len
= msg
.model_emf_uri_len
;
2149 /* recv signature. contains at least \0. */
2150 a_sign
= zmalloc(signature_len
);
2153 len
= ustcomm_recv_unix_sock(sock
, a_sign
, signature_len
);
2154 if (len
> 0 && len
!= signature_len
) {
2156 goto signature_error
;
2160 goto signature_error
;
2163 goto signature_error
;
2165 /* Enforce end of string */
2166 a_sign
[signature_len
- 1] = '\0';
2170 a_fields
= zmalloc(fields_len
);
2173 goto signature_error
;
2175 len
= ustcomm_recv_unix_sock(sock
, a_fields
, fields_len
);
2176 if (len
> 0 && len
!= fields_len
) {
2189 if (model_emf_uri_len
) {
2190 /* recv model_emf_uri_len */
2191 a_model_emf_uri
= zmalloc(model_emf_uri_len
);
2192 if (!a_model_emf_uri
) {
2196 len
= ustcomm_recv_unix_sock(sock
, a_model_emf_uri
,
2198 if (len
> 0 && len
!= model_emf_uri_len
) {
2209 /* Enforce end of string */
2210 a_model_emf_uri
[model_emf_uri_len
- 1] = '\0';
2213 *signature
= a_sign
;
2214 *nr_fields
= fields_len
/ sizeof(*a_fields
);
2216 *model_emf_uri
= a_model_emf_uri
;
2221 free(a_model_emf_uri
);
2230 * Returns 0 on success, negative error value on error.
2232 int ustctl_reply_register_event(int sock
,
2238 struct ustcomm_notify_hdr header
;
2239 struct ustcomm_notify_event_reply r
;
2242 memset(&reply
, 0, sizeof(reply
));
2243 reply
.header
.notify_cmd
= USTCTL_NOTIFY_CMD_EVENT
;
2244 reply
.r
.ret_code
= ret_code
;
2245 reply
.r
.event_id
= id
;
2246 len
= ustcomm_send_unix_sock(sock
, &reply
, sizeof(reply
));
2247 if (len
> 0 && len
!= sizeof(reply
))
2255 * Returns 0 on success, negative UST or system error value on error.
2257 int ustctl_recv_register_enum(int sock
,
2260 struct ustctl_enum_entry
**entries
,
2264 struct ustcomm_notify_enum_msg msg
;
2266 struct ustctl_enum_entry
*a_entries
= NULL
;
2268 len
= ustcomm_recv_unix_sock(sock
, &msg
, sizeof(msg
));
2269 if (len
> 0 && len
!= sizeof(msg
))
2276 *session_objd
= msg
.session_objd
;
2277 strncpy(enum_name
, msg
.enum_name
, LTTNG_UST_SYM_NAME_LEN
);
2278 enum_name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
2279 entries_len
= msg
.entries_len
;
2281 if (entries_len
% sizeof(*a_entries
) != 0) {
2287 a_entries
= zmalloc(entries_len
);
2290 len
= ustcomm_recv_unix_sock(sock
, a_entries
, entries_len
);
2291 if (len
> 0 && len
!= entries_len
) {
2303 *nr_entries
= entries_len
/ sizeof(*a_entries
);
2304 *entries
= a_entries
;
2314 * Returns 0 on success, negative error value on error.
2316 int ustctl_reply_register_enum(int sock
,
2322 struct ustcomm_notify_hdr header
;
2323 struct ustcomm_notify_enum_reply r
;
2326 memset(&reply
, 0, sizeof(reply
));
2327 reply
.header
.notify_cmd
= USTCTL_NOTIFY_CMD_ENUM
;
2328 reply
.r
.ret_code
= ret_code
;
2329 reply
.r
.enum_id
= id
;
2330 len
= ustcomm_send_unix_sock(sock
, &reply
, sizeof(reply
));
2331 if (len
> 0 && len
!= sizeof(reply
))
2339 * Returns 0 on success, negative UST or system error value on error.
2341 int ustctl_recv_register_channel(int sock
,
2342 int *session_objd
, /* session descriptor (output) */
2343 int *channel_objd
, /* channel descriptor (output) */
2345 struct ustctl_field
**fields
)
2348 struct ustcomm_notify_channel_msg msg
;
2350 struct ustctl_field
*a_fields
;
2352 len
= ustcomm_recv_unix_sock(sock
, &msg
, sizeof(msg
));
2353 if (len
> 0 && len
!= sizeof(msg
))
2360 *session_objd
= msg
.session_objd
;
2361 *channel_objd
= msg
.channel_objd
;
2362 fields_len
= msg
.ctx_fields_len
;
2364 if (fields_len
% sizeof(*a_fields
) != 0) {
2370 a_fields
= zmalloc(fields_len
);
2375 len
= ustcomm_recv_unix_sock(sock
, a_fields
, fields_len
);
2376 if (len
> 0 && len
!= fields_len
) {
2391 *nr_fields
= fields_len
/ sizeof(*a_fields
);
2401 * Returns 0 on success, negative error value on error.
2403 int ustctl_reply_register_channel(int sock
,
2405 enum ustctl_channel_header header_type
,
2410 struct ustcomm_notify_hdr header
;
2411 struct ustcomm_notify_channel_reply r
;
2414 memset(&reply
, 0, sizeof(reply
));
2415 reply
.header
.notify_cmd
= USTCTL_NOTIFY_CMD_CHANNEL
;
2416 reply
.r
.ret_code
= ret_code
;
2417 reply
.r
.chan_id
= chan_id
;
2418 switch (header_type
) {
2419 case USTCTL_CHANNEL_HEADER_COMPACT
:
2420 reply
.r
.header_type
= 1;
2422 case USTCTL_CHANNEL_HEADER_LARGE
:
2423 reply
.r
.header_type
= 2;
2426 reply
.r
.header_type
= 0;
2429 len
= ustcomm_send_unix_sock(sock
, &reply
, sizeof(reply
));
2430 if (len
> 0 && len
!= sizeof(reply
))
2437 /* Regenerate the statedump. */
2438 int ustctl_regenerate_statedump(int sock
, int handle
)
2440 struct ustcomm_ust_msg lum
;
2441 struct ustcomm_ust_reply lur
;
2444 memset(&lum
, 0, sizeof(lum
));
2445 lum
.handle
= handle
;
2446 lum
.cmd
= LTTNG_UST_SESSION_STATEDUMP
;
2447 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
2450 DBG("Regenerated statedump for handle %u", handle
);
2454 /* counter operations */
2456 int ustctl_get_nr_cpu_per_counter(void)
2458 return lttng_counter_num_possible_cpus();
2461 struct ustctl_daemon_counter
*
2462 ustctl_create_counter(size_t nr_dimensions
,
2463 const struct ustctl_counter_dimension
*dimensions
,
2464 int64_t global_sum_step
,
2465 int global_counter_fd
,
2466 int nr_counter_cpu_fds
,
2467 const int *counter_cpu_fds
,
2468 enum ustctl_counter_bitness bitness
,
2469 enum ustctl_counter_arithmetic arithmetic
,
2470 uint32_t alloc_flags
)
2472 const char *transport_name
;
2473 struct ustctl_daemon_counter
*counter
;
2474 struct lttng_counter_transport
*transport
;
2475 struct lttng_counter_dimension ust_dim
[LTTNG_COUNTER_DIMENSION_MAX
];
2478 if (nr_dimensions
> LTTNG_COUNTER_DIMENSION_MAX
)
2480 /* Currently, only per-cpu allocation is supported. */
2481 switch (alloc_flags
) {
2482 case USTCTL_COUNTER_ALLOC_PER_CPU
:
2485 case USTCTL_COUNTER_ALLOC_PER_CPU
| USTCTL_COUNTER_ALLOC_GLOBAL
:
2486 case USTCTL_COUNTER_ALLOC_GLOBAL
:
2491 case USTCTL_COUNTER_BITNESS_32
:
2492 switch (arithmetic
) {
2493 case USTCTL_COUNTER_ARITHMETIC_MODULAR
:
2494 transport_name
= "counter-per-cpu-32-modular";
2496 case USTCTL_COUNTER_ARITHMETIC_SATURATION
:
2497 transport_name
= "counter-per-cpu-32-saturation";
2503 case USTCTL_COUNTER_BITNESS_64
:
2504 switch (arithmetic
) {
2505 case USTCTL_COUNTER_ARITHMETIC_MODULAR
:
2506 transport_name
= "counter-per-cpu-64-modular";
2508 case USTCTL_COUNTER_ARITHMETIC_SATURATION
:
2509 transport_name
= "counter-per-cpu-64-saturation";
2519 transport
= lttng_counter_transport_find(transport_name
);
2521 DBG("LTTng transport %s not found\n",
2526 counter
= zmalloc(sizeof(*counter
));
2529 counter
->attr
= zmalloc(sizeof(*counter
->attr
));
2532 counter
->attr
->bitness
= bitness
;
2533 counter
->attr
->arithmetic
= arithmetic
;
2534 counter
->attr
->nr_dimensions
= nr_dimensions
;
2535 counter
->attr
->global_sum_step
= global_sum_step
;
2536 for (i
= 0; i
< nr_dimensions
; i
++)
2537 counter
->attr
->dimensions
[i
] = dimensions
[i
];
2539 for (i
= 0; i
< nr_dimensions
; i
++) {
2540 ust_dim
[i
].size
= dimensions
[i
].size
;
2541 ust_dim
[i
].underflow_index
= dimensions
[i
].underflow_index
;
2542 ust_dim
[i
].overflow_index
= dimensions
[i
].overflow_index
;
2543 ust_dim
[i
].has_underflow
= dimensions
[i
].has_underflow
;
2544 ust_dim
[i
].has_overflow
= dimensions
[i
].has_overflow
;
2546 counter
->counter
= transport
->ops
.counter_create(nr_dimensions
,
2547 ust_dim
, global_sum_step
, global_counter_fd
,
2548 nr_counter_cpu_fds
, counter_cpu_fds
, true);
2549 if (!counter
->counter
)
2551 counter
->ops
= &transport
->ops
;
2555 free(counter
->attr
);
2561 int ustctl_create_counter_data(struct ustctl_daemon_counter
*counter
,
2562 struct lttng_ust_object_data
**_counter_data
)
2564 struct lttng_ust_object_data
*counter_data
;
2565 struct lttng_ust_counter_conf counter_conf
;
2569 switch (counter
->attr
->arithmetic
) {
2570 case USTCTL_COUNTER_ARITHMETIC_MODULAR
:
2571 counter_conf
.arithmetic
= LTTNG_UST_COUNTER_ARITHMETIC_MODULAR
;
2573 case USTCTL_COUNTER_ARITHMETIC_SATURATION
:
2574 counter_conf
.arithmetic
= LTTNG_UST_COUNTER_ARITHMETIC_SATURATION
;
2579 switch (counter
->attr
->bitness
) {
2580 case USTCTL_COUNTER_BITNESS_32
:
2581 counter_conf
.bitness
= LTTNG_UST_COUNTER_BITNESS_32BITS
;
2583 case USTCTL_COUNTER_BITNESS_64
:
2584 counter_conf
.bitness
= LTTNG_UST_COUNTER_BITNESS_64BITS
;
2589 counter_conf
.number_dimensions
= counter
->attr
->nr_dimensions
;
2590 counter_conf
.global_sum_step
= counter
->attr
->global_sum_step
;
2591 for (i
= 0; i
< counter
->attr
->nr_dimensions
; i
++) {
2592 counter_conf
.dimensions
[i
].size
= counter
->attr
->dimensions
[i
].size
;
2593 counter_conf
.dimensions
[i
].underflow_index
= counter
->attr
->dimensions
[i
].underflow_index
;
2594 counter_conf
.dimensions
[i
].overflow_index
= counter
->attr
->dimensions
[i
].overflow_index
;
2595 counter_conf
.dimensions
[i
].has_underflow
= counter
->attr
->dimensions
[i
].has_underflow
;
2596 counter_conf
.dimensions
[i
].has_overflow
= counter
->attr
->dimensions
[i
].has_overflow
;
2599 counter_data
= zmalloc(sizeof(*counter_data
));
2600 if (!counter_data
) {
2604 counter_data
->type
= LTTNG_UST_OBJECT_TYPE_COUNTER
;
2605 counter_data
->handle
= -1;
2607 counter_data
->size
= sizeof(counter_conf
);
2608 counter_data
->u
.counter
.data
= zmalloc(sizeof(counter_conf
));
2609 if (!counter_data
->u
.counter
.data
) {
2611 goto error_alloc_data
;
2614 memcpy(counter_data
->u
.counter
.data
, &counter_conf
, sizeof(counter_conf
));
2615 *_counter_data
= counter_data
;
2625 int ustctl_create_counter_global_data(struct ustctl_daemon_counter
*counter
,
2626 struct lttng_ust_object_data
**_counter_global_data
)
2628 struct lttng_ust_object_data
*counter_global_data
;
2632 if (lttng_counter_get_global_shm(counter
->counter
, &fd
, &len
))
2634 counter_global_data
= zmalloc(sizeof(*counter_global_data
));
2635 if (!counter_global_data
) {
2639 counter_global_data
->type
= LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL
;
2640 counter_global_data
->handle
= -1;
2641 counter_global_data
->size
= len
;
2642 counter_global_data
->u
.counter_global
.shm_fd
= fd
;
2643 *_counter_global_data
= counter_global_data
;
2650 int ustctl_create_counter_cpu_data(struct ustctl_daemon_counter
*counter
, int cpu
,
2651 struct lttng_ust_object_data
**_counter_cpu_data
)
2653 struct lttng_ust_object_data
*counter_cpu_data
;
2657 if (lttng_counter_get_cpu_shm(counter
->counter
, cpu
, &fd
, &len
))
2659 counter_cpu_data
= zmalloc(sizeof(*counter_cpu_data
));
2660 if (!counter_cpu_data
) {
2664 counter_cpu_data
->type
= LTTNG_UST_OBJECT_TYPE_COUNTER_CPU
;
2665 counter_cpu_data
->handle
= -1;
2666 counter_cpu_data
->size
= len
;
2667 counter_cpu_data
->u
.counter_cpu
.shm_fd
= fd
;
2668 counter_cpu_data
->u
.counter_cpu
.cpu_nr
= cpu
;
2669 *_counter_cpu_data
= counter_cpu_data
;
2676 void ustctl_destroy_counter(struct ustctl_daemon_counter
*counter
)
2678 counter
->ops
->counter_destroy(counter
->counter
);
2679 free(counter
->attr
);
2683 int ustctl_send_counter_data_to_ust(int sock
, int parent_handle
,
2684 struct lttng_ust_object_data
*counter_data
)
2686 struct ustcomm_ust_msg lum
;
2687 struct ustcomm_ust_reply lur
;
2695 size
= counter_data
->size
;
2696 memset(&lum
, 0, sizeof(lum
));
2697 lum
.handle
= parent_handle
;
2698 lum
.cmd
= LTTNG_UST_COUNTER
;
2699 lum
.u
.counter
.len
= size
;
2700 ret
= ustcomm_send_app_msg(sock
, &lum
);
2704 /* Send counter data */
2705 len
= ustcomm_send_unix_sock(sock
, counter_data
->u
.counter
.data
, size
);
2713 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
2715 counter_data
->handle
= lur
.ret_val
;
2720 int ustctl_send_counter_global_data_to_ust(int sock
,
2721 struct lttng_ust_object_data
*counter_data
,
2722 struct lttng_ust_object_data
*counter_global_data
)
2724 struct ustcomm_ust_msg lum
;
2725 struct ustcomm_ust_reply lur
;
2730 if (!counter_data
|| !counter_global_data
)
2733 size
= counter_global_data
->size
;
2734 memset(&lum
, 0, sizeof(lum
));
2735 lum
.handle
= counter_data
->handle
; /* parent handle */
2736 lum
.cmd
= LTTNG_UST_COUNTER_GLOBAL
;
2737 lum
.u
.counter_global
.len
= size
;
2738 ret
= ustcomm_send_app_msg(sock
, &lum
);
2742 shm_fd
[0] = counter_global_data
->u
.counter_global
.shm_fd
;
2743 len
= ustcomm_send_fds_unix_sock(sock
, shm_fd
, 1);
2751 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
2753 counter_global_data
->handle
= lur
.ret_val
;
2758 int ustctl_send_counter_cpu_data_to_ust(int sock
,
2759 struct lttng_ust_object_data
*counter_data
,
2760 struct lttng_ust_object_data
*counter_cpu_data
)
2762 struct ustcomm_ust_msg lum
;
2763 struct ustcomm_ust_reply lur
;
2768 if (!counter_data
|| !counter_cpu_data
)
2771 size
= counter_cpu_data
->size
;
2772 memset(&lum
, 0, sizeof(lum
));
2773 lum
.handle
= counter_data
->handle
; /* parent handle */
2774 lum
.cmd
= LTTNG_UST_COUNTER_CPU
;
2775 lum
.u
.counter_cpu
.len
= size
;
2776 lum
.u
.counter_cpu
.cpu_nr
= counter_cpu_data
->u
.counter_cpu
.cpu_nr
;
2777 ret
= ustcomm_send_app_msg(sock
, &lum
);
2781 shm_fd
[0] = counter_cpu_data
->u
.counter_global
.shm_fd
;
2782 len
= ustcomm_send_fds_unix_sock(sock
, shm_fd
, 1);
2790 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
2792 counter_cpu_data
->handle
= lur
.ret_val
;
2797 int ustctl_counter_read(struct ustctl_daemon_counter
*counter
,
2798 const size_t *dimension_indexes
,
2799 int cpu
, int64_t *value
,
2800 bool *overflow
, bool *underflow
)
2802 return counter
->ops
->counter_read(counter
->counter
, dimension_indexes
, cpu
,
2803 value
, overflow
, underflow
);
2806 int ustctl_counter_aggregate(struct ustctl_daemon_counter
*counter
,
2807 const size_t *dimension_indexes
,
2809 bool *overflow
, bool *underflow
)
2811 return counter
->ops
->counter_aggregate(counter
->counter
, dimension_indexes
,
2812 value
, overflow
, underflow
);
2815 int ustctl_counter_clear(struct ustctl_daemon_counter
*counter
,
2816 const size_t *dimension_indexes
)
2818 return counter
->ops
->counter_clear(counter
->counter
, dimension_indexes
);
2821 static __attribute__((constructor
))
2822 void ustctl_init(void)
2825 lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */
2826 lttng_ust_clock_init();
2827 lttng_ring_buffer_metadata_client_init();
2828 lttng_ring_buffer_client_overwrite_init();
2829 lttng_ring_buffer_client_overwrite_rt_init();
2830 lttng_ring_buffer_client_discard_init();
2831 lttng_ring_buffer_client_discard_rt_init();
2832 lttng_counter_client_percpu_32_modular_init();
2833 lttng_counter_client_percpu_64_modular_init();
2834 lib_ringbuffer_signal_init();
2837 static __attribute__((destructor
))
2838 void ustctl_exit(void)
2840 lttng_ring_buffer_client_discard_rt_exit();
2841 lttng_ring_buffer_client_discard_exit();
2842 lttng_ring_buffer_client_overwrite_rt_exit();
2843 lttng_ring_buffer_client_overwrite_exit();
2844 lttng_ring_buffer_metadata_client_exit();
2845 lttng_counter_client_percpu_32_modular_exit();
2846 lttng_counter_client_percpu_64_modular_exit();