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
;
568 if (!event_notifier_group
|| !_event_notifier_data
)
571 event_notifier_data
= zmalloc(sizeof(*event_notifier_data
));
572 if (!event_notifier_data
)
575 event_notifier_data
->type
= LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER
;
577 memset(&lum
, 0, sizeof(lum
));
578 lum
.handle
= event_notifier_group
->handle
;
579 lum
.cmd
= LTTNG_UST_EVENT_NOTIFIER_CREATE
;
580 lum
.u
.event_notifier
.len
= sizeof(*event_notifier
);
582 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
584 free(event_notifier_data
);
587 /* Send struct lttng_ust_event_notifier */
588 len
= ustcomm_send_unix_sock(sock
, event_notifier
, sizeof(*event_notifier
));
589 if (len
!= sizeof(*event_notifier
)) {
595 event_notifier_data
->handle
= lur
.ret_val
;
596 DBG("received event_notifier handle %u", event_notifier_data
->handle
);
597 *_event_notifier_data
= event_notifier_data
;
602 int ustctl_tracepoint_list(int sock
)
604 struct ustcomm_ust_msg lum
;
605 struct ustcomm_ust_reply lur
;
606 int ret
, tp_list_handle
;
608 memset(&lum
, 0, sizeof(lum
));
609 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
610 lum
.cmd
= LTTNG_UST_TRACEPOINT_LIST
;
611 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
614 tp_list_handle
= lur
.ret_val
;
615 DBG("received tracepoint list handle %u", tp_list_handle
);
616 return tp_list_handle
;
619 int ustctl_tracepoint_list_get(int sock
, int tp_list_handle
,
620 struct lttng_ust_tracepoint_iter
*iter
)
622 struct ustcomm_ust_msg lum
;
623 struct ustcomm_ust_reply lur
;
629 memset(&lum
, 0, sizeof(lum
));
630 lum
.handle
= tp_list_handle
;
631 lum
.cmd
= LTTNG_UST_TRACEPOINT_LIST_GET
;
632 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
635 DBG("received tracepoint list entry name %s loglevel %d",
636 lur
.u
.tracepoint
.name
,
637 lur
.u
.tracepoint
.loglevel
);
638 memcpy(iter
, &lur
.u
.tracepoint
, sizeof(*iter
));
642 int ustctl_tracepoint_field_list(int sock
)
644 struct ustcomm_ust_msg lum
;
645 struct ustcomm_ust_reply lur
;
646 int ret
, tp_field_list_handle
;
648 memset(&lum
, 0, sizeof(lum
));
649 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
650 lum
.cmd
= LTTNG_UST_TRACEPOINT_FIELD_LIST
;
651 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
654 tp_field_list_handle
= lur
.ret_val
;
655 DBG("received tracepoint field list handle %u", tp_field_list_handle
);
656 return tp_field_list_handle
;
659 int ustctl_tracepoint_field_list_get(int sock
, int tp_field_list_handle
,
660 struct lttng_ust_field_iter
*iter
)
662 struct ustcomm_ust_msg lum
;
663 struct ustcomm_ust_reply lur
;
670 memset(&lum
, 0, sizeof(lum
));
671 lum
.handle
= tp_field_list_handle
;
672 lum
.cmd
= LTTNG_UST_TRACEPOINT_FIELD_LIST_GET
;
673 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
676 len
= ustcomm_recv_unix_sock(sock
, iter
, sizeof(*iter
));
677 if (len
!= sizeof(*iter
)) {
680 DBG("received tracepoint field list entry event_name %s event_loglevel %d field_name %s field_type %d",
688 int ustctl_tracer_version(int sock
, struct lttng_ust_tracer_version
*v
)
690 struct ustcomm_ust_msg lum
;
691 struct ustcomm_ust_reply lur
;
697 memset(&lum
, 0, sizeof(lum
));
698 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
699 lum
.cmd
= LTTNG_UST_TRACER_VERSION
;
700 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
703 memcpy(v
, &lur
.u
.version
, sizeof(*v
));
704 DBG("received tracer version");
708 int ustctl_wait_quiescent(int sock
)
710 struct ustcomm_ust_msg lum
;
711 struct ustcomm_ust_reply lur
;
714 memset(&lum
, 0, sizeof(lum
));
715 lum
.handle
= LTTNG_UST_ROOT_HANDLE
;
716 lum
.cmd
= LTTNG_UST_WAIT_QUIESCENT
;
717 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
720 DBG("waited for quiescent state");
724 int ustctl_calibrate(int sock
, struct lttng_ust_calibrate
*calibrate
)
732 int ustctl_sock_flush_buffer(int sock
, struct lttng_ust_object_data
*object
)
734 struct ustcomm_ust_msg lum
;
735 struct ustcomm_ust_reply lur
;
741 memset(&lum
, 0, sizeof(lum
));
742 lum
.handle
= object
->handle
;
743 lum
.cmd
= LTTNG_UST_FLUSH_BUFFER
;
744 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
747 DBG("flushed buffer handle %u", object
->handle
);
752 int ustctl_send_channel(int sock
,
753 enum lttng_ust_chan_type type
,
763 len
= ustcomm_send_unix_sock(sock
, &size
, sizeof(size
));
764 if (len
!= sizeof(size
)) {
771 /* Send channel type */
772 len
= ustcomm_send_unix_sock(sock
, &type
, sizeof(type
));
773 if (len
!= sizeof(type
)) {
781 /* Send channel data */
782 len
= ustcomm_send_unix_sock(sock
, data
, size
);
791 len
= ustcomm_send_fds_unix_sock(sock
, &wakeup_fd
, 1);
802 int ustctl_send_stream(int sock
,
804 uint64_t memory_map_size
,
805 int shm_fd
, int wakeup_fd
,
813 /* finish iteration */
816 len
= ustcomm_send_unix_sock(sock
, &v
, sizeof(v
));
817 if (len
!= sizeof(v
)) {
827 len
= ustcomm_send_unix_sock(sock
, &memory_map_size
,
828 sizeof(memory_map_size
));
829 if (len
!= sizeof(memory_map_size
)) {
837 len
= ustcomm_send_unix_sock(sock
, &stream_nr
,
839 if (len
!= sizeof(stream_nr
)) {
847 /* Send shm fd and wakeup fd */
850 len
= ustcomm_send_fds_unix_sock(sock
, fds
, 2);
860 int ustctl_recv_channel_from_consumer(int sock
,
861 struct lttng_ust_object_data
**_channel_data
)
863 struct lttng_ust_object_data
*channel_data
;
868 channel_data
= zmalloc(sizeof(*channel_data
));
873 channel_data
->type
= LTTNG_UST_OBJECT_TYPE_CHANNEL
;
874 channel_data
->handle
= -1;
877 len
= ustcomm_recv_unix_sock(sock
, &channel_data
->size
,
878 sizeof(channel_data
->size
));
879 if (len
!= sizeof(channel_data
->size
)) {
887 /* recv channel type */
888 len
= ustcomm_recv_unix_sock(sock
, &channel_data
->u
.channel
.type
,
889 sizeof(channel_data
->u
.channel
.type
));
890 if (len
!= sizeof(channel_data
->u
.channel
.type
)) {
898 /* recv channel data */
899 channel_data
->u
.channel
.data
= zmalloc(channel_data
->size
);
900 if (!channel_data
->u
.channel
.data
) {
904 len
= ustcomm_recv_unix_sock(sock
, channel_data
->u
.channel
.data
,
906 if (len
!= channel_data
->size
) {
911 goto error_recv_data
;
914 len
= ustcomm_recv_fds_unix_sock(sock
, &wakeup_fd
, 1);
918 goto error_recv_data
;
921 goto error_recv_data
;
924 channel_data
->u
.channel
.wakeup_fd
= wakeup_fd
;
925 *_channel_data
= channel_data
;
929 free(channel_data
->u
.channel
.data
);
936 int ustctl_recv_stream_from_consumer(int sock
,
937 struct lttng_ust_object_data
**_stream_data
)
939 struct lttng_ust_object_data
*stream_data
;
944 stream_data
= zmalloc(sizeof(*stream_data
));
950 stream_data
->type
= LTTNG_UST_OBJECT_TYPE_STREAM
;
951 stream_data
->handle
= -1;
954 len
= ustcomm_recv_unix_sock(sock
, &stream_data
->size
,
955 sizeof(stream_data
->size
));
956 if (len
!= sizeof(stream_data
->size
)) {
963 if (stream_data
->size
== -1) {
964 ret
= -LTTNG_UST_ERR_NOENT
;
969 len
= ustcomm_recv_unix_sock(sock
, &stream_data
->u
.stream
.stream_nr
,
970 sizeof(stream_data
->u
.stream
.stream_nr
));
971 if (len
!= sizeof(stream_data
->u
.stream
.stream_nr
)) {
979 /* recv shm fd and wakeup fd */
980 len
= ustcomm_recv_fds_unix_sock(sock
, fds
, 2);
990 stream_data
->u
.stream
.shm_fd
= fds
[0];
991 stream_data
->u
.stream
.wakeup_fd
= fds
[1];
992 *_stream_data
= stream_data
;
1001 int ustctl_send_channel_to_ust(int sock
, int session_handle
,
1002 struct lttng_ust_object_data
*channel_data
)
1004 struct ustcomm_ust_msg lum
;
1005 struct ustcomm_ust_reply lur
;
1011 memset(&lum
, 0, sizeof(lum
));
1012 lum
.handle
= session_handle
;
1013 lum
.cmd
= LTTNG_UST_CHANNEL
;
1014 lum
.u
.channel
.len
= channel_data
->size
;
1015 lum
.u
.channel
.type
= channel_data
->u
.channel
.type
;
1016 ret
= ustcomm_send_app_msg(sock
, &lum
);
1020 ret
= ustctl_send_channel(sock
,
1021 channel_data
->u
.channel
.type
,
1022 channel_data
->u
.channel
.data
,
1024 channel_data
->u
.channel
.wakeup_fd
,
1028 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
1030 channel_data
->handle
= lur
.ret_val
;
1035 int ustctl_send_stream_to_ust(int sock
,
1036 struct lttng_ust_object_data
*channel_data
,
1037 struct lttng_ust_object_data
*stream_data
)
1039 struct ustcomm_ust_msg lum
;
1040 struct ustcomm_ust_reply lur
;
1043 memset(&lum
, 0, sizeof(lum
));
1044 lum
.handle
= channel_data
->handle
;
1045 lum
.cmd
= LTTNG_UST_STREAM
;
1046 lum
.u
.stream
.len
= stream_data
->size
;
1047 lum
.u
.stream
.stream_nr
= stream_data
->u
.stream
.stream_nr
;
1048 ret
= ustcomm_send_app_msg(sock
, &lum
);
1052 assert(stream_data
);
1053 assert(stream_data
->type
== LTTNG_UST_OBJECT_TYPE_STREAM
);
1055 ret
= ustctl_send_stream(sock
,
1056 stream_data
->u
.stream
.stream_nr
,
1058 stream_data
->u
.stream
.shm_fd
,
1059 stream_data
->u
.stream
.wakeup_fd
, 1);
1062 return ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
1065 int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data
**dest
,
1066 struct lttng_ust_object_data
*src
)
1068 struct lttng_ust_object_data
*obj
;
1071 if (src
->handle
!= -1) {
1076 obj
= zmalloc(sizeof(*obj
));
1082 obj
->type
= src
->type
;
1083 obj
->handle
= src
->handle
;
1084 obj
->size
= src
->size
;
1086 switch (obj
->type
) {
1087 case LTTNG_UST_OBJECT_TYPE_CHANNEL
:
1089 obj
->u
.channel
.type
= src
->u
.channel
.type
;
1090 if (src
->u
.channel
.wakeup_fd
>= 0) {
1091 obj
->u
.channel
.wakeup_fd
=
1092 dup(src
->u
.channel
.wakeup_fd
);
1093 if (obj
->u
.channel
.wakeup_fd
< 0) {
1095 goto chan_error_wakeup_fd
;
1098 obj
->u
.channel
.wakeup_fd
=
1099 src
->u
.channel
.wakeup_fd
;
1101 obj
->u
.channel
.data
= zmalloc(obj
->size
);
1102 if (!obj
->u
.channel
.data
) {
1104 goto chan_error_alloc
;
1106 memcpy(obj
->u
.channel
.data
, src
->u
.channel
.data
, obj
->size
);
1110 if (src
->u
.channel
.wakeup_fd
>= 0) {
1113 closeret
= close(obj
->u
.channel
.wakeup_fd
);
1118 chan_error_wakeup_fd
:
1123 case LTTNG_UST_OBJECT_TYPE_STREAM
:
1125 obj
->u
.stream
.stream_nr
= src
->u
.stream
.stream_nr
;
1126 if (src
->u
.stream
.wakeup_fd
>= 0) {
1127 obj
->u
.stream
.wakeup_fd
=
1128 dup(src
->u
.stream
.wakeup_fd
);
1129 if (obj
->u
.stream
.wakeup_fd
< 0) {
1131 goto stream_error_wakeup_fd
;
1134 obj
->u
.stream
.wakeup_fd
=
1135 src
->u
.stream
.wakeup_fd
;
1138 if (src
->u
.stream
.shm_fd
>= 0) {
1139 obj
->u
.stream
.shm_fd
=
1140 dup(src
->u
.stream
.shm_fd
);
1141 if (obj
->u
.stream
.shm_fd
< 0) {
1143 goto stream_error_shm_fd
;
1146 obj
->u
.stream
.shm_fd
=
1147 src
->u
.stream
.shm_fd
;
1151 stream_error_shm_fd
:
1152 if (src
->u
.stream
.wakeup_fd
>= 0) {
1155 closeret
= close(obj
->u
.stream
.wakeup_fd
);
1160 stream_error_wakeup_fd
:
1164 case LTTNG_UST_OBJECT_TYPE_COUNTER
:
1166 obj
->u
.counter
.data
= zmalloc(obj
->size
);
1167 if (!obj
->u
.counter
.data
) {
1171 memcpy(obj
->u
.counter
.data
, src
->u
.counter
.data
, obj
->size
);
1175 case LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL
:
1177 if (src
->u
.counter_global
.shm_fd
>= 0) {
1178 obj
->u
.counter_global
.shm_fd
=
1179 dup(src
->u
.counter_global
.shm_fd
);
1180 if (obj
->u
.counter_global
.shm_fd
< 0) {
1188 case LTTNG_UST_OBJECT_TYPE_COUNTER_CPU
:
1190 obj
->u
.counter_cpu
.cpu_nr
= src
->u
.counter_cpu
.cpu_nr
;
1191 if (src
->u
.counter_cpu
.shm_fd
>= 0) {
1192 obj
->u
.counter_cpu
.shm_fd
=
1193 dup(src
->u
.counter_cpu
.shm_fd
);
1194 if (obj
->u
.counter_cpu
.shm_fd
< 0) {
1217 /* Buffer operations */
1219 int ustctl_get_nr_stream_per_channel(void)
1221 return num_possible_cpus();
1224 struct ustctl_consumer_channel
*
1225 ustctl_create_channel(struct ustctl_consumer_channel_attr
*attr
,
1226 const int *stream_fds
, int nr_stream_fds
)
1228 struct ustctl_consumer_channel
*chan
;
1229 const char *transport_name
;
1230 struct lttng_transport
*transport
;
1232 switch (attr
->type
) {
1233 case LTTNG_UST_CHAN_PER_CPU
:
1234 if (attr
->output
== LTTNG_UST_MMAP
) {
1235 if (attr
->overwrite
) {
1236 if (attr
->read_timer_interval
== 0) {
1237 transport_name
= "relay-overwrite-mmap";
1239 transport_name
= "relay-overwrite-rt-mmap";
1242 if (attr
->read_timer_interval
== 0) {
1243 transport_name
= "relay-discard-mmap";
1245 transport_name
= "relay-discard-rt-mmap";
1252 case LTTNG_UST_CHAN_METADATA
:
1253 if (attr
->output
== LTTNG_UST_MMAP
)
1254 transport_name
= "relay-metadata-mmap";
1259 transport_name
= "<unknown>";
1263 transport
= lttng_transport_find(transport_name
);
1265 DBG("LTTng transport %s not found\n",
1270 chan
= zmalloc(sizeof(*chan
));
1274 chan
->chan
= transport
->ops
.channel_create(transport_name
, NULL
,
1275 attr
->subbuf_size
, attr
->num_subbuf
,
1276 attr
->switch_timer_interval
,
1277 attr
->read_timer_interval
,
1278 attr
->uuid
, attr
->chan_id
,
1279 stream_fds
, nr_stream_fds
,
1280 attr
->blocking_timeout
);
1284 chan
->chan
->ops
= &transport
->ops
;
1285 memcpy(&chan
->attr
, attr
, sizeof(chan
->attr
));
1286 chan
->wait_fd
= ustctl_channel_get_wait_fd(chan
);
1287 chan
->wakeup_fd
= ustctl_channel_get_wakeup_fd(chan
);
1295 void ustctl_destroy_channel(struct ustctl_consumer_channel
*chan
)
1297 (void) ustctl_channel_close_wait_fd(chan
);
1298 (void) ustctl_channel_close_wakeup_fd(chan
);
1299 chan
->chan
->ops
->channel_destroy(chan
->chan
);
1303 int ustctl_send_channel_to_sessiond(int sock
,
1304 struct ustctl_consumer_channel
*channel
)
1306 struct shm_object_table
*table
;
1308 table
= channel
->chan
->handle
->table
;
1309 if (table
->size
<= 0)
1311 return ustctl_send_channel(sock
,
1313 table
->objects
[0].memory_map
,
1314 table
->objects
[0].memory_map_size
,
1319 int ustctl_send_stream_to_sessiond(int sock
,
1320 struct ustctl_consumer_stream
*stream
)
1323 return ustctl_send_stream(sock
, -1U, -1U, -1, -1, 0);
1325 return ustctl_send_stream(sock
,
1327 stream
->memory_map_size
,
1328 stream
->shm_fd
, stream
->wakeup_fd
,
1332 int ustctl_write_metadata_to_channel(
1333 struct ustctl_consumer_channel
*channel
,
1334 const char *metadata_str
, /* NOT null-terminated */
1335 size_t len
) /* metadata length */
1337 struct lttng_ust_lib_ring_buffer_ctx ctx
;
1338 struct lttng_channel
*chan
= channel
->chan
;
1339 const char *str
= metadata_str
;
1340 int ret
= 0, waitret
;
1341 size_t reserve_len
, pos
;
1343 for (pos
= 0; pos
< len
; pos
+= reserve_len
) {
1344 reserve_len
= min_t(size_t,
1345 chan
->ops
->packet_avail_size(chan
->chan
, chan
->handle
),
1347 lib_ring_buffer_ctx_init(&ctx
, chan
->chan
, NULL
, reserve_len
,
1348 sizeof(char), -1, chan
->handle
, NULL
);
1350 * We don't care about metadata buffer's records lost
1351 * count, because we always retry here. Report error if
1352 * we need to bail out after timeout or being
1355 waitret
= wait_cond_interruptible_timeout(
1357 ret
= chan
->ops
->event_reserve(&ctx
, 0);
1358 ret
!= -ENOBUFS
|| !ret
;
1360 LTTNG_METADATA_TIMEOUT_MSEC
);
1361 if (waitret
== -ETIMEDOUT
|| waitret
== -EINTR
|| ret
) {
1362 DBG("LTTng: Failure to write metadata to buffers (%s)\n",
1363 waitret
== -EINTR
? "interrupted" :
1364 (ret
== -ENOBUFS
? "timeout" : "I/O error"));
1365 if (waitret
== -EINTR
)
1369 chan
->ops
->event_write(&ctx
, &str
[pos
], reserve_len
);
1370 chan
->ops
->event_commit(&ctx
);
1377 * Write at most one packet in the channel.
1378 * Returns the number of bytes written on success, < 0 on error.
1380 ssize_t
ustctl_write_one_packet_to_channel(
1381 struct ustctl_consumer_channel
*channel
,
1382 const char *metadata_str
, /* NOT null-terminated */
1383 size_t len
) /* metadata length */
1385 struct lttng_ust_lib_ring_buffer_ctx ctx
;
1386 struct lttng_channel
*chan
= channel
->chan
;
1387 const char *str
= metadata_str
;
1388 ssize_t reserve_len
;
1391 reserve_len
= min_t(ssize_t
,
1392 chan
->ops
->packet_avail_size(chan
->chan
, chan
->handle
),
1394 lib_ring_buffer_ctx_init(&ctx
, chan
->chan
, NULL
, reserve_len
,
1395 sizeof(char), -1, chan
->handle
, NULL
);
1396 ret
= chan
->ops
->event_reserve(&ctx
, 0);
1398 DBG("LTTng: event reservation failed");
1403 chan
->ops
->event_write(&ctx
, str
, reserve_len
);
1404 chan
->ops
->event_commit(&ctx
);
1410 int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel
*consumer_chan
)
1412 struct channel
*chan
;
1415 chan
= consumer_chan
->chan
->chan
;
1416 ret
= ring_buffer_channel_close_wait_fd(&chan
->backend
.config
,
1417 chan
, chan
->handle
);
1419 consumer_chan
->wait_fd
= -1;
1423 int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel
*consumer_chan
)
1425 struct channel
*chan
;
1428 chan
= consumer_chan
->chan
->chan
;
1429 ret
= ring_buffer_channel_close_wakeup_fd(&chan
->backend
.config
,
1430 chan
, chan
->handle
);
1432 consumer_chan
->wakeup_fd
= -1;
1436 int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream
*stream
)
1438 struct channel
*chan
;
1440 chan
= stream
->chan
->chan
->chan
;
1441 return ring_buffer_stream_close_wait_fd(&chan
->backend
.config
,
1442 chan
, stream
->handle
, stream
->cpu
);
1445 int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream
*stream
)
1447 struct channel
*chan
;
1449 chan
= stream
->chan
->chan
->chan
;
1450 return ring_buffer_stream_close_wakeup_fd(&chan
->backend
.config
,
1451 chan
, stream
->handle
, stream
->cpu
);
1454 struct ustctl_consumer_stream
*
1455 ustctl_create_stream(struct ustctl_consumer_channel
*channel
,
1458 struct ustctl_consumer_stream
*stream
;
1459 struct lttng_ust_shm_handle
*handle
;
1460 struct channel
*chan
;
1461 int shm_fd
, wait_fd
, wakeup_fd
;
1462 uint64_t memory_map_size
;
1463 struct lttng_ust_lib_ring_buffer
*buf
;
1468 handle
= channel
->chan
->handle
;
1472 chan
= channel
->chan
->chan
;
1473 buf
= channel_get_ring_buffer(&chan
->backend
.config
,
1474 chan
, cpu
, handle
, &shm_fd
, &wait_fd
,
1475 &wakeup_fd
, &memory_map_size
);
1478 ret
= lib_ring_buffer_open_read(buf
, handle
);
1482 stream
= zmalloc(sizeof(*stream
));
1485 stream
->handle
= handle
;
1487 stream
->chan
= channel
;
1488 stream
->shm_fd
= shm_fd
;
1489 stream
->wait_fd
= wait_fd
;
1490 stream
->wakeup_fd
= wakeup_fd
;
1491 stream
->memory_map_size
= memory_map_size
;
1499 void ustctl_destroy_stream(struct ustctl_consumer_stream
*stream
)
1501 struct lttng_ust_lib_ring_buffer
*buf
;
1502 struct ustctl_consumer_channel
*consumer_chan
;
1506 consumer_chan
= stream
->chan
;
1507 (void) ustctl_stream_close_wait_fd(stream
);
1508 (void) ustctl_stream_close_wakeup_fd(stream
);
1509 lib_ring_buffer_release_read(buf
, consumer_chan
->chan
->handle
);
1513 int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel
*chan
)
1517 return shm_get_wait_fd(chan
->chan
->handle
,
1518 &chan
->chan
->handle
->chan
._ref
);
1521 int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel
*chan
)
1525 return shm_get_wakeup_fd(chan
->chan
->handle
,
1526 &chan
->chan
->handle
->chan
._ref
);
1529 int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream
*stream
)
1531 struct lttng_ust_lib_ring_buffer
*buf
;
1532 struct ustctl_consumer_channel
*consumer_chan
;
1537 consumer_chan
= stream
->chan
;
1538 return shm_get_wait_fd(consumer_chan
->chan
->handle
, &buf
->self
._ref
);
1541 int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream
*stream
)
1543 struct lttng_ust_lib_ring_buffer
*buf
;
1544 struct ustctl_consumer_channel
*consumer_chan
;
1549 consumer_chan
= stream
->chan
;
1550 return shm_get_wakeup_fd(consumer_chan
->chan
->handle
, &buf
->self
._ref
);
1553 /* For mmap mode, readable without "get" operation */
1555 void *ustctl_get_mmap_base(struct ustctl_consumer_stream
*stream
)
1557 struct lttng_ust_lib_ring_buffer
*buf
;
1558 struct ustctl_consumer_channel
*consumer_chan
;
1563 consumer_chan
= stream
->chan
;
1564 return shmp(consumer_chan
->chan
->handle
, buf
->backend
.memory_map
);
1567 /* returns the length to mmap. */
1568 int ustctl_get_mmap_len(struct ustctl_consumer_stream
*stream
,
1571 struct ustctl_consumer_channel
*consumer_chan
;
1572 unsigned long mmap_buf_len
;
1573 struct channel
*chan
;
1577 consumer_chan
= stream
->chan
;
1578 chan
= consumer_chan
->chan
->chan
;
1579 if (chan
->backend
.config
.output
!= RING_BUFFER_MMAP
)
1581 mmap_buf_len
= chan
->backend
.buf_size
;
1582 if (chan
->backend
.extra_reader_sb
)
1583 mmap_buf_len
+= chan
->backend
.subbuf_size
;
1584 if (mmap_buf_len
> INT_MAX
)
1586 *len
= mmap_buf_len
;
1590 /* returns the maximum size for sub-buffers. */
1591 int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream
*stream
,
1594 struct ustctl_consumer_channel
*consumer_chan
;
1595 struct channel
*chan
;
1599 consumer_chan
= stream
->chan
;
1600 chan
= consumer_chan
->chan
->chan
;
1601 *len
= chan
->backend
.subbuf_size
;
1606 * For mmap mode, operate on the current packet (between get/put or
1607 * get_next/put_next).
1610 /* returns the offset of the subbuffer belonging to the mmap reader. */
1611 int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream
*stream
,
1614 struct channel
*chan
;
1615 unsigned long sb_bindex
;
1616 struct lttng_ust_lib_ring_buffer
*buf
;
1617 struct ustctl_consumer_channel
*consumer_chan
;
1618 struct lttng_ust_lib_ring_buffer_backend_pages_shmp
*barray_idx
;
1619 struct lttng_ust_lib_ring_buffer_backend_pages
*pages
;
1624 consumer_chan
= stream
->chan
;
1625 chan
= consumer_chan
->chan
->chan
;
1626 if (chan
->backend
.config
.output
!= RING_BUFFER_MMAP
)
1628 sb_bindex
= subbuffer_id_get_index(&chan
->backend
.config
,
1629 buf
->backend
.buf_rsb
.id
);
1630 barray_idx
= shmp_index(consumer_chan
->chan
->handle
, buf
->backend
.array
,
1634 pages
= shmp(consumer_chan
->chan
->handle
, barray_idx
->shmp
);
1637 *off
= pages
->mmap_offset
;
1641 /* returns the size of the current sub-buffer, without padding (for mmap). */
1642 int ustctl_get_subbuf_size(struct ustctl_consumer_stream
*stream
,
1645 struct ustctl_consumer_channel
*consumer_chan
;
1646 struct channel
*chan
;
1647 struct lttng_ust_lib_ring_buffer
*buf
;
1653 consumer_chan
= stream
->chan
;
1654 chan
= consumer_chan
->chan
->chan
;
1655 *len
= lib_ring_buffer_get_read_data_size(&chan
->backend
.config
, buf
,
1656 consumer_chan
->chan
->handle
);
1660 /* returns the size of the current sub-buffer, without padding (for mmap). */
1661 int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream
*stream
,
1664 struct ustctl_consumer_channel
*consumer_chan
;
1665 struct channel
*chan
;
1666 struct lttng_ust_lib_ring_buffer
*buf
;
1671 consumer_chan
= stream
->chan
;
1672 chan
= consumer_chan
->chan
->chan
;
1673 *len
= lib_ring_buffer_get_read_data_size(&chan
->backend
.config
, buf
,
1674 consumer_chan
->chan
->handle
);
1675 *len
= LTTNG_UST_PAGE_ALIGN(*len
);
1679 /* Get exclusive read access to the next sub-buffer that can be read. */
1680 int ustctl_get_next_subbuf(struct ustctl_consumer_stream
*stream
)
1682 struct lttng_ust_lib_ring_buffer
*buf
;
1683 struct ustctl_consumer_channel
*consumer_chan
;
1688 consumer_chan
= stream
->chan
;
1689 return lib_ring_buffer_get_next_subbuf(buf
,
1690 consumer_chan
->chan
->handle
);
1694 /* Release exclusive sub-buffer access, move consumer forward. */
1695 int ustctl_put_next_subbuf(struct ustctl_consumer_stream
*stream
)
1697 struct lttng_ust_lib_ring_buffer
*buf
;
1698 struct ustctl_consumer_channel
*consumer_chan
;
1703 consumer_chan
= stream
->chan
;
1704 lib_ring_buffer_put_next_subbuf(buf
, consumer_chan
->chan
->handle
);
1710 /* Get a snapshot of the current ring buffer producer and consumer positions */
1711 int ustctl_snapshot(struct ustctl_consumer_stream
*stream
)
1713 struct lttng_ust_lib_ring_buffer
*buf
;
1714 struct ustctl_consumer_channel
*consumer_chan
;
1719 consumer_chan
= stream
->chan
;
1720 return lib_ring_buffer_snapshot(buf
, &buf
->cons_snapshot
,
1721 &buf
->prod_snapshot
, consumer_chan
->chan
->handle
);
1725 * Get a snapshot of the current ring buffer producer and consumer positions
1726 * even if the consumed and produced positions are contained within the same
1729 int ustctl_snapshot_sample_positions(struct ustctl_consumer_stream
*stream
)
1731 struct lttng_ust_lib_ring_buffer
*buf
;
1732 struct ustctl_consumer_channel
*consumer_chan
;
1737 consumer_chan
= stream
->chan
;
1738 return lib_ring_buffer_snapshot_sample_positions(buf
,
1739 &buf
->cons_snapshot
, &buf
->prod_snapshot
,
1740 consumer_chan
->chan
->handle
);
1743 /* Get the consumer position (iteration start) */
1744 int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream
*stream
,
1747 struct lttng_ust_lib_ring_buffer
*buf
;
1752 *pos
= buf
->cons_snapshot
;
1756 /* Get the producer position (iteration end) */
1757 int ustctl_snapshot_get_produced(struct ustctl_consumer_stream
*stream
,
1760 struct lttng_ust_lib_ring_buffer
*buf
;
1765 *pos
= buf
->prod_snapshot
;
1769 /* Get exclusive read access to the specified sub-buffer position */
1770 int ustctl_get_subbuf(struct ustctl_consumer_stream
*stream
,
1773 struct lttng_ust_lib_ring_buffer
*buf
;
1774 struct ustctl_consumer_channel
*consumer_chan
;
1779 consumer_chan
= stream
->chan
;
1780 return lib_ring_buffer_get_subbuf(buf
, *pos
,
1781 consumer_chan
->chan
->handle
);
1784 /* Release exclusive sub-buffer access */
1785 int ustctl_put_subbuf(struct ustctl_consumer_stream
*stream
)
1787 struct lttng_ust_lib_ring_buffer
*buf
;
1788 struct ustctl_consumer_channel
*consumer_chan
;
1793 consumer_chan
= stream
->chan
;
1794 lib_ring_buffer_put_subbuf(buf
, consumer_chan
->chan
->handle
);
1798 void ustctl_flush_buffer(struct ustctl_consumer_stream
*stream
,
1799 int producer_active
)
1801 struct lttng_ust_lib_ring_buffer
*buf
;
1802 struct ustctl_consumer_channel
*consumer_chan
;
1806 consumer_chan
= stream
->chan
;
1807 lib_ring_buffer_switch_slow(buf
,
1808 producer_active
? SWITCH_ACTIVE
: SWITCH_FLUSH
,
1809 consumer_chan
->chan
->handle
);
1812 void ustctl_clear_buffer(struct ustctl_consumer_stream
*stream
)
1814 struct lttng_ust_lib_ring_buffer
*buf
;
1815 struct ustctl_consumer_channel
*consumer_chan
;
1819 consumer_chan
= stream
->chan
;
1820 lib_ring_buffer_switch_slow(buf
, SWITCH_ACTIVE
,
1821 consumer_chan
->chan
->handle
);
1822 lib_ring_buffer_clear_reader(buf
, consumer_chan
->chan
->handle
);
1826 struct lttng_ust_client_lib_ring_buffer_client_cb
*get_client_cb(
1827 struct lttng_ust_lib_ring_buffer
*buf
,
1828 struct lttng_ust_shm_handle
*handle
)
1830 struct channel
*chan
;
1831 const struct lttng_ust_lib_ring_buffer_config
*config
;
1832 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1834 chan
= shmp(handle
, buf
->backend
.chan
);
1837 config
= &chan
->backend
.config
;
1838 if (!config
->cb_ptr
)
1840 client_cb
= caa_container_of(config
->cb_ptr
,
1841 struct lttng_ust_client_lib_ring_buffer_client_cb
,
1846 int ustctl_get_timestamp_begin(struct ustctl_consumer_stream
*stream
,
1847 uint64_t *timestamp_begin
)
1849 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1850 struct lttng_ust_lib_ring_buffer
*buf
;
1851 struct lttng_ust_shm_handle
*handle
;
1853 if (!stream
|| !timestamp_begin
)
1856 handle
= stream
->chan
->chan
->handle
;
1857 client_cb
= get_client_cb(buf
, handle
);
1860 return client_cb
->timestamp_begin(buf
, handle
, timestamp_begin
);
1863 int ustctl_get_timestamp_end(struct ustctl_consumer_stream
*stream
,
1864 uint64_t *timestamp_end
)
1866 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1867 struct lttng_ust_lib_ring_buffer
*buf
;
1868 struct lttng_ust_shm_handle
*handle
;
1870 if (!stream
|| !timestamp_end
)
1873 handle
= stream
->chan
->chan
->handle
;
1874 client_cb
= get_client_cb(buf
, handle
);
1877 return client_cb
->timestamp_end(buf
, handle
, timestamp_end
);
1880 int ustctl_get_events_discarded(struct ustctl_consumer_stream
*stream
,
1881 uint64_t *events_discarded
)
1883 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1884 struct lttng_ust_lib_ring_buffer
*buf
;
1885 struct lttng_ust_shm_handle
*handle
;
1887 if (!stream
|| !events_discarded
)
1890 handle
= stream
->chan
->chan
->handle
;
1891 client_cb
= get_client_cb(buf
, handle
);
1894 return client_cb
->events_discarded(buf
, handle
, events_discarded
);
1897 int ustctl_get_content_size(struct ustctl_consumer_stream
*stream
,
1898 uint64_t *content_size
)
1900 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1901 struct lttng_ust_lib_ring_buffer
*buf
;
1902 struct lttng_ust_shm_handle
*handle
;
1904 if (!stream
|| !content_size
)
1907 handle
= stream
->chan
->chan
->handle
;
1908 client_cb
= get_client_cb(buf
, handle
);
1911 return client_cb
->content_size(buf
, handle
, content_size
);
1914 int ustctl_get_packet_size(struct ustctl_consumer_stream
*stream
,
1915 uint64_t *packet_size
)
1917 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1918 struct lttng_ust_lib_ring_buffer
*buf
;
1919 struct lttng_ust_shm_handle
*handle
;
1921 if (!stream
|| !packet_size
)
1924 handle
= stream
->chan
->chan
->handle
;
1925 client_cb
= get_client_cb(buf
, handle
);
1928 return client_cb
->packet_size(buf
, handle
, packet_size
);
1931 int ustctl_get_stream_id(struct ustctl_consumer_stream
*stream
,
1932 uint64_t *stream_id
)
1934 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1935 struct lttng_ust_lib_ring_buffer
*buf
;
1936 struct lttng_ust_shm_handle
*handle
;
1938 if (!stream
|| !stream_id
)
1941 handle
= stream
->chan
->chan
->handle
;
1942 client_cb
= get_client_cb(buf
, handle
);
1945 return client_cb
->stream_id(buf
, handle
, stream_id
);
1948 int ustctl_get_current_timestamp(struct ustctl_consumer_stream
*stream
,
1951 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1952 struct lttng_ust_lib_ring_buffer
*buf
;
1953 struct lttng_ust_shm_handle
*handle
;
1958 handle
= stream
->chan
->chan
->handle
;
1959 client_cb
= get_client_cb(buf
, handle
);
1960 if (!client_cb
|| !client_cb
->current_timestamp
)
1962 return client_cb
->current_timestamp(buf
, handle
, ts
);
1965 int ustctl_get_sequence_number(struct ustctl_consumer_stream
*stream
,
1968 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1969 struct lttng_ust_lib_ring_buffer
*buf
;
1970 struct lttng_ust_shm_handle
*handle
;
1972 if (!stream
|| !seq
)
1975 handle
= stream
->chan
->chan
->handle
;
1976 client_cb
= get_client_cb(buf
, handle
);
1977 if (!client_cb
|| !client_cb
->sequence_number
)
1979 return client_cb
->sequence_number(buf
, handle
, seq
);
1982 int ustctl_get_instance_id(struct ustctl_consumer_stream
*stream
,
1985 struct lttng_ust_client_lib_ring_buffer_client_cb
*client_cb
;
1986 struct lttng_ust_lib_ring_buffer
*buf
;
1987 struct lttng_ust_shm_handle
*handle
;
1992 handle
= stream
->chan
->chan
->handle
;
1993 client_cb
= get_client_cb(buf
, handle
);
1996 return client_cb
->instance_id(buf
, handle
, id
);
1999 #ifdef LTTNG_UST_HAVE_PERF_EVENT
2001 int ustctl_has_perf_counters(void)
2008 int ustctl_has_perf_counters(void)
2016 * Returns 0 on success, negative error value on error.
2018 int ustctl_recv_reg_msg(int sock
,
2019 enum ustctl_socket_type
*type
,
2026 uint32_t *bits_per_long
,
2027 uint32_t *uint8_t_alignment
,
2028 uint32_t *uint16_t_alignment
,
2029 uint32_t *uint32_t_alignment
,
2030 uint32_t *uint64_t_alignment
,
2031 uint32_t *long_alignment
,
2036 struct ustctl_reg_msg reg_msg
;
2038 len
= ustcomm_recv_unix_sock(sock
, ®_msg
, sizeof(reg_msg
));
2039 if (len
> 0 && len
!= sizeof(reg_msg
))
2046 if (reg_msg
.magic
== LTTNG_UST_COMM_MAGIC
) {
2047 *byte_order
= BYTE_ORDER
== BIG_ENDIAN
?
2048 BIG_ENDIAN
: LITTLE_ENDIAN
;
2049 } else if (reg_msg
.magic
== bswap_32(LTTNG_UST_COMM_MAGIC
)) {
2050 *byte_order
= BYTE_ORDER
== BIG_ENDIAN
?
2051 LITTLE_ENDIAN
: BIG_ENDIAN
;
2053 return -LTTNG_UST_ERR_INVAL_MAGIC
;
2055 switch (reg_msg
.socket_type
) {
2056 case 0: *type
= USTCTL_SOCKET_CMD
;
2058 case 1: *type
= USTCTL_SOCKET_NOTIFY
;
2061 return -LTTNG_UST_ERR_INVAL_SOCKET_TYPE
;
2063 *major
= reg_msg
.major
;
2064 *minor
= reg_msg
.minor
;
2066 *ppid
= reg_msg
.ppid
;
2069 *bits_per_long
= reg_msg
.bits_per_long
;
2070 *uint8_t_alignment
= reg_msg
.uint8_t_alignment
;
2071 *uint16_t_alignment
= reg_msg
.uint16_t_alignment
;
2072 *uint32_t_alignment
= reg_msg
.uint32_t_alignment
;
2073 *uint64_t_alignment
= reg_msg
.uint64_t_alignment
;
2074 *long_alignment
= reg_msg
.long_alignment
;
2075 memcpy(name
, reg_msg
.name
, LTTNG_UST_ABI_PROCNAME_LEN
);
2076 if (reg_msg
.major
< LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE
||
2077 reg_msg
.major
> LTTNG_UST_ABI_MAJOR_VERSION
) {
2078 return -LTTNG_UST_ERR_UNSUP_MAJOR
;
2084 int ustctl_recv_notify(int sock
, enum ustctl_notify_cmd
*notify_cmd
)
2086 struct ustcomm_notify_hdr header
;
2089 len
= ustcomm_recv_unix_sock(sock
, &header
, sizeof(header
));
2090 if (len
> 0 && len
!= sizeof(header
))
2096 switch (header
.notify_cmd
) {
2098 *notify_cmd
= USTCTL_NOTIFY_CMD_EVENT
;
2101 *notify_cmd
= USTCTL_NOTIFY_CMD_CHANNEL
;
2104 *notify_cmd
= USTCTL_NOTIFY_CMD_ENUM
;
2113 * Returns 0 on success, negative error value on error.
2115 int ustctl_recv_register_event(int sock
,
2122 struct ustctl_field
**fields
,
2123 char **model_emf_uri
)
2126 struct ustcomm_notify_event_msg msg
;
2127 size_t signature_len
, fields_len
, model_emf_uri_len
;
2128 char *a_sign
= NULL
, *a_model_emf_uri
= NULL
;
2129 struct ustctl_field
*a_fields
= NULL
;
2131 len
= ustcomm_recv_unix_sock(sock
, &msg
, sizeof(msg
));
2132 if (len
> 0 && len
!= sizeof(msg
))
2139 *session_objd
= msg
.session_objd
;
2140 *channel_objd
= msg
.channel_objd
;
2141 strncpy(event_name
, msg
.event_name
, LTTNG_UST_SYM_NAME_LEN
);
2142 event_name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
2143 *loglevel
= msg
.loglevel
;
2144 signature_len
= msg
.signature_len
;
2145 fields_len
= msg
.fields_len
;
2147 if (fields_len
% sizeof(*a_fields
) != 0) {
2151 model_emf_uri_len
= msg
.model_emf_uri_len
;
2153 /* recv signature. contains at least \0. */
2154 a_sign
= zmalloc(signature_len
);
2157 len
= ustcomm_recv_unix_sock(sock
, a_sign
, signature_len
);
2158 if (len
> 0 && len
!= signature_len
) {
2160 goto signature_error
;
2164 goto signature_error
;
2167 goto signature_error
;
2169 /* Enforce end of string */
2170 a_sign
[signature_len
- 1] = '\0';
2174 a_fields
= zmalloc(fields_len
);
2177 goto signature_error
;
2179 len
= ustcomm_recv_unix_sock(sock
, a_fields
, fields_len
);
2180 if (len
> 0 && len
!= fields_len
) {
2193 if (model_emf_uri_len
) {
2194 /* recv model_emf_uri_len */
2195 a_model_emf_uri
= zmalloc(model_emf_uri_len
);
2196 if (!a_model_emf_uri
) {
2200 len
= ustcomm_recv_unix_sock(sock
, a_model_emf_uri
,
2202 if (len
> 0 && len
!= model_emf_uri_len
) {
2213 /* Enforce end of string */
2214 a_model_emf_uri
[model_emf_uri_len
- 1] = '\0';
2217 *signature
= a_sign
;
2218 *nr_fields
= fields_len
/ sizeof(*a_fields
);
2220 *model_emf_uri
= a_model_emf_uri
;
2225 free(a_model_emf_uri
);
2234 * Returns 0 on success, negative error value on error.
2236 int ustctl_reply_register_event(int sock
,
2242 struct ustcomm_notify_hdr header
;
2243 struct ustcomm_notify_event_reply r
;
2246 memset(&reply
, 0, sizeof(reply
));
2247 reply
.header
.notify_cmd
= USTCTL_NOTIFY_CMD_EVENT
;
2248 reply
.r
.ret_code
= ret_code
;
2249 reply
.r
.event_id
= id
;
2250 len
= ustcomm_send_unix_sock(sock
, &reply
, sizeof(reply
));
2251 if (len
> 0 && len
!= sizeof(reply
))
2259 * Returns 0 on success, negative UST or system error value on error.
2261 int ustctl_recv_register_enum(int sock
,
2264 struct ustctl_enum_entry
**entries
,
2268 struct ustcomm_notify_enum_msg msg
;
2270 struct ustctl_enum_entry
*a_entries
= NULL
;
2272 len
= ustcomm_recv_unix_sock(sock
, &msg
, sizeof(msg
));
2273 if (len
> 0 && len
!= sizeof(msg
))
2280 *session_objd
= msg
.session_objd
;
2281 strncpy(enum_name
, msg
.enum_name
, LTTNG_UST_SYM_NAME_LEN
);
2282 enum_name
[LTTNG_UST_SYM_NAME_LEN
- 1] = '\0';
2283 entries_len
= msg
.entries_len
;
2285 if (entries_len
% sizeof(*a_entries
) != 0) {
2291 a_entries
= zmalloc(entries_len
);
2294 len
= ustcomm_recv_unix_sock(sock
, a_entries
, entries_len
);
2295 if (len
> 0 && len
!= entries_len
) {
2307 *nr_entries
= entries_len
/ sizeof(*a_entries
);
2308 *entries
= a_entries
;
2318 * Returns 0 on success, negative error value on error.
2320 int ustctl_reply_register_enum(int sock
,
2326 struct ustcomm_notify_hdr header
;
2327 struct ustcomm_notify_enum_reply r
;
2330 memset(&reply
, 0, sizeof(reply
));
2331 reply
.header
.notify_cmd
= USTCTL_NOTIFY_CMD_ENUM
;
2332 reply
.r
.ret_code
= ret_code
;
2333 reply
.r
.enum_id
= id
;
2334 len
= ustcomm_send_unix_sock(sock
, &reply
, sizeof(reply
));
2335 if (len
> 0 && len
!= sizeof(reply
))
2343 * Returns 0 on success, negative UST or system error value on error.
2345 int ustctl_recv_register_channel(int sock
,
2346 int *session_objd
, /* session descriptor (output) */
2347 int *channel_objd
, /* channel descriptor (output) */
2349 struct ustctl_field
**fields
)
2352 struct ustcomm_notify_channel_msg msg
;
2354 struct ustctl_field
*a_fields
;
2356 len
= ustcomm_recv_unix_sock(sock
, &msg
, sizeof(msg
));
2357 if (len
> 0 && len
!= sizeof(msg
))
2364 *session_objd
= msg
.session_objd
;
2365 *channel_objd
= msg
.channel_objd
;
2366 fields_len
= msg
.ctx_fields_len
;
2368 if (fields_len
% sizeof(*a_fields
) != 0) {
2374 a_fields
= zmalloc(fields_len
);
2379 len
= ustcomm_recv_unix_sock(sock
, a_fields
, fields_len
);
2380 if (len
> 0 && len
!= fields_len
) {
2395 *nr_fields
= fields_len
/ sizeof(*a_fields
);
2405 * Returns 0 on success, negative error value on error.
2407 int ustctl_reply_register_channel(int sock
,
2409 enum ustctl_channel_header header_type
,
2414 struct ustcomm_notify_hdr header
;
2415 struct ustcomm_notify_channel_reply r
;
2418 memset(&reply
, 0, sizeof(reply
));
2419 reply
.header
.notify_cmd
= USTCTL_NOTIFY_CMD_CHANNEL
;
2420 reply
.r
.ret_code
= ret_code
;
2421 reply
.r
.chan_id
= chan_id
;
2422 switch (header_type
) {
2423 case USTCTL_CHANNEL_HEADER_COMPACT
:
2424 reply
.r
.header_type
= 1;
2426 case USTCTL_CHANNEL_HEADER_LARGE
:
2427 reply
.r
.header_type
= 2;
2430 reply
.r
.header_type
= 0;
2433 len
= ustcomm_send_unix_sock(sock
, &reply
, sizeof(reply
));
2434 if (len
> 0 && len
!= sizeof(reply
))
2441 /* Regenerate the statedump. */
2442 int ustctl_regenerate_statedump(int sock
, int handle
)
2444 struct ustcomm_ust_msg lum
;
2445 struct ustcomm_ust_reply lur
;
2448 memset(&lum
, 0, sizeof(lum
));
2449 lum
.handle
= handle
;
2450 lum
.cmd
= LTTNG_UST_SESSION_STATEDUMP
;
2451 ret
= ustcomm_send_app_cmd(sock
, &lum
, &lur
);
2454 DBG("Regenerated statedump for handle %u", handle
);
2458 /* counter operations */
2460 int ustctl_get_nr_cpu_per_counter(void)
2462 return lttng_counter_num_possible_cpus();
2465 struct ustctl_daemon_counter
*
2466 ustctl_create_counter(size_t nr_dimensions
,
2467 const struct ustctl_counter_dimension
*dimensions
,
2468 int64_t global_sum_step
,
2469 int global_counter_fd
,
2470 int nr_counter_cpu_fds
,
2471 const int *counter_cpu_fds
,
2472 enum ustctl_counter_bitness bitness
,
2473 enum ustctl_counter_arithmetic arithmetic
,
2474 uint32_t alloc_flags
)
2476 const char *transport_name
;
2477 struct ustctl_daemon_counter
*counter
;
2478 struct lttng_counter_transport
*transport
;
2479 struct lttng_counter_dimension ust_dim
[LTTNG_COUNTER_DIMENSION_MAX
];
2482 if (nr_dimensions
> LTTNG_COUNTER_DIMENSION_MAX
)
2484 /* Currently, only per-cpu allocation is supported. */
2485 switch (alloc_flags
) {
2486 case USTCTL_COUNTER_ALLOC_PER_CPU
:
2489 case USTCTL_COUNTER_ALLOC_PER_CPU
| USTCTL_COUNTER_ALLOC_GLOBAL
:
2490 case USTCTL_COUNTER_ALLOC_GLOBAL
:
2495 case USTCTL_COUNTER_BITNESS_32
:
2496 switch (arithmetic
) {
2497 case USTCTL_COUNTER_ARITHMETIC_MODULAR
:
2498 transport_name
= "counter-per-cpu-32-modular";
2500 case USTCTL_COUNTER_ARITHMETIC_SATURATION
:
2501 transport_name
= "counter-per-cpu-32-saturation";
2507 case USTCTL_COUNTER_BITNESS_64
:
2508 switch (arithmetic
) {
2509 case USTCTL_COUNTER_ARITHMETIC_MODULAR
:
2510 transport_name
= "counter-per-cpu-64-modular";
2512 case USTCTL_COUNTER_ARITHMETIC_SATURATION
:
2513 transport_name
= "counter-per-cpu-64-saturation";
2523 transport
= lttng_counter_transport_find(transport_name
);
2525 DBG("LTTng transport %s not found\n",
2530 counter
= zmalloc(sizeof(*counter
));
2533 counter
->attr
= zmalloc(sizeof(*counter
->attr
));
2536 counter
->attr
->bitness
= bitness
;
2537 counter
->attr
->arithmetic
= arithmetic
;
2538 counter
->attr
->nr_dimensions
= nr_dimensions
;
2539 counter
->attr
->global_sum_step
= global_sum_step
;
2540 for (i
= 0; i
< nr_dimensions
; i
++)
2541 counter
->attr
->dimensions
[i
] = dimensions
[i
];
2543 for (i
= 0; i
< nr_dimensions
; i
++) {
2544 ust_dim
[i
].size
= dimensions
[i
].size
;
2545 ust_dim
[i
].underflow_index
= dimensions
[i
].underflow_index
;
2546 ust_dim
[i
].overflow_index
= dimensions
[i
].overflow_index
;
2547 ust_dim
[i
].has_underflow
= dimensions
[i
].has_underflow
;
2548 ust_dim
[i
].has_overflow
= dimensions
[i
].has_overflow
;
2550 counter
->counter
= transport
->ops
.counter_create(nr_dimensions
,
2551 ust_dim
, global_sum_step
, global_counter_fd
,
2552 nr_counter_cpu_fds
, counter_cpu_fds
, true);
2553 if (!counter
->counter
)
2555 counter
->ops
= &transport
->ops
;
2559 free(counter
->attr
);
2565 int ustctl_create_counter_data(struct ustctl_daemon_counter
*counter
,
2566 struct lttng_ust_object_data
**_counter_data
)
2568 struct lttng_ust_object_data
*counter_data
;
2569 struct lttng_ust_counter_conf counter_conf
= {0};
2573 switch (counter
->attr
->arithmetic
) {
2574 case USTCTL_COUNTER_ARITHMETIC_MODULAR
:
2575 counter_conf
.arithmetic
= LTTNG_UST_COUNTER_ARITHMETIC_MODULAR
;
2577 case USTCTL_COUNTER_ARITHMETIC_SATURATION
:
2578 counter_conf
.arithmetic
= LTTNG_UST_COUNTER_ARITHMETIC_SATURATION
;
2583 switch (counter
->attr
->bitness
) {
2584 case USTCTL_COUNTER_BITNESS_32
:
2585 counter_conf
.bitness
= LTTNG_UST_COUNTER_BITNESS_32
;
2587 case USTCTL_COUNTER_BITNESS_64
:
2588 counter_conf
.bitness
= LTTNG_UST_COUNTER_BITNESS_64
;
2593 counter_conf
.number_dimensions
= counter
->attr
->nr_dimensions
;
2594 counter_conf
.global_sum_step
= counter
->attr
->global_sum_step
;
2595 for (i
= 0; i
< counter
->attr
->nr_dimensions
; i
++) {
2596 counter_conf
.dimensions
[i
].size
= counter
->attr
->dimensions
[i
].size
;
2597 counter_conf
.dimensions
[i
].underflow_index
= counter
->attr
->dimensions
[i
].underflow_index
;
2598 counter_conf
.dimensions
[i
].overflow_index
= counter
->attr
->dimensions
[i
].overflow_index
;
2599 counter_conf
.dimensions
[i
].has_underflow
= counter
->attr
->dimensions
[i
].has_underflow
;
2600 counter_conf
.dimensions
[i
].has_overflow
= counter
->attr
->dimensions
[i
].has_overflow
;
2603 counter_data
= zmalloc(sizeof(*counter_data
));
2604 if (!counter_data
) {
2608 counter_data
->type
= LTTNG_UST_OBJECT_TYPE_COUNTER
;
2609 counter_data
->handle
= -1;
2611 counter_data
->size
= sizeof(counter_conf
);
2612 counter_data
->u
.counter
.data
= zmalloc(sizeof(counter_conf
));
2613 if (!counter_data
->u
.counter
.data
) {
2615 goto error_alloc_data
;
2618 memcpy(counter_data
->u
.counter
.data
, &counter_conf
, sizeof(counter_conf
));
2619 *_counter_data
= counter_data
;
2629 int ustctl_create_counter_global_data(struct ustctl_daemon_counter
*counter
,
2630 struct lttng_ust_object_data
**_counter_global_data
)
2632 struct lttng_ust_object_data
*counter_global_data
;
2636 if (lttng_counter_get_global_shm(counter
->counter
, &fd
, &len
))
2638 counter_global_data
= zmalloc(sizeof(*counter_global_data
));
2639 if (!counter_global_data
) {
2643 counter_global_data
->type
= LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL
;
2644 counter_global_data
->handle
= -1;
2645 counter_global_data
->size
= len
;
2646 counter_global_data
->u
.counter_global
.shm_fd
= fd
;
2647 *_counter_global_data
= counter_global_data
;
2654 int ustctl_create_counter_cpu_data(struct ustctl_daemon_counter
*counter
, int cpu
,
2655 struct lttng_ust_object_data
**_counter_cpu_data
)
2657 struct lttng_ust_object_data
*counter_cpu_data
;
2661 if (lttng_counter_get_cpu_shm(counter
->counter
, cpu
, &fd
, &len
))
2663 counter_cpu_data
= zmalloc(sizeof(*counter_cpu_data
));
2664 if (!counter_cpu_data
) {
2668 counter_cpu_data
->type
= LTTNG_UST_OBJECT_TYPE_COUNTER_CPU
;
2669 counter_cpu_data
->handle
= -1;
2670 counter_cpu_data
->size
= len
;
2671 counter_cpu_data
->u
.counter_cpu
.shm_fd
= fd
;
2672 counter_cpu_data
->u
.counter_cpu
.cpu_nr
= cpu
;
2673 *_counter_cpu_data
= counter_cpu_data
;
2680 void ustctl_destroy_counter(struct ustctl_daemon_counter
*counter
)
2682 counter
->ops
->counter_destroy(counter
->counter
);
2683 free(counter
->attr
);
2687 int ustctl_send_counter_data_to_ust(int sock
, int parent_handle
,
2688 struct lttng_ust_object_data
*counter_data
)
2690 struct ustcomm_ust_msg lum
;
2691 struct ustcomm_ust_reply lur
;
2699 size
= counter_data
->size
;
2700 memset(&lum
, 0, sizeof(lum
));
2701 lum
.handle
= parent_handle
;
2702 lum
.cmd
= LTTNG_UST_COUNTER
;
2703 lum
.u
.counter
.len
= size
;
2704 ret
= ustcomm_send_app_msg(sock
, &lum
);
2708 /* Send counter data */
2709 len
= ustcomm_send_unix_sock(sock
, counter_data
->u
.counter
.data
, size
);
2717 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
2719 counter_data
->handle
= lur
.ret_val
;
2724 int ustctl_send_counter_global_data_to_ust(int sock
,
2725 struct lttng_ust_object_data
*counter_data
,
2726 struct lttng_ust_object_data
*counter_global_data
)
2728 struct ustcomm_ust_msg lum
;
2729 struct ustcomm_ust_reply lur
;
2734 if (!counter_data
|| !counter_global_data
)
2737 size
= counter_global_data
->size
;
2738 memset(&lum
, 0, sizeof(lum
));
2739 lum
.handle
= counter_data
->handle
; /* parent handle */
2740 lum
.cmd
= LTTNG_UST_COUNTER_GLOBAL
;
2741 lum
.u
.counter_global
.len
= size
;
2742 ret
= ustcomm_send_app_msg(sock
, &lum
);
2746 shm_fd
[0] = counter_global_data
->u
.counter_global
.shm_fd
;
2747 len
= ustcomm_send_fds_unix_sock(sock
, shm_fd
, 1);
2755 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
2757 counter_global_data
->handle
= lur
.ret_val
;
2762 int ustctl_send_counter_cpu_data_to_ust(int sock
,
2763 struct lttng_ust_object_data
*counter_data
,
2764 struct lttng_ust_object_data
*counter_cpu_data
)
2766 struct ustcomm_ust_msg lum
;
2767 struct ustcomm_ust_reply lur
;
2772 if (!counter_data
|| !counter_cpu_data
)
2775 size
= counter_cpu_data
->size
;
2776 memset(&lum
, 0, sizeof(lum
));
2777 lum
.handle
= counter_data
->handle
; /* parent handle */
2778 lum
.cmd
= LTTNG_UST_COUNTER_CPU
;
2779 lum
.u
.counter_cpu
.len
= size
;
2780 lum
.u
.counter_cpu
.cpu_nr
= counter_cpu_data
->u
.counter_cpu
.cpu_nr
;
2781 ret
= ustcomm_send_app_msg(sock
, &lum
);
2785 shm_fd
[0] = counter_cpu_data
->u
.counter_global
.shm_fd
;
2786 len
= ustcomm_send_fds_unix_sock(sock
, shm_fd
, 1);
2794 ret
= ustcomm_recv_app_reply(sock
, &lur
, lum
.handle
, lum
.cmd
);
2796 counter_cpu_data
->handle
= lur
.ret_val
;
2801 int ustctl_counter_read(struct ustctl_daemon_counter
*counter
,
2802 const size_t *dimension_indexes
,
2803 int cpu
, int64_t *value
,
2804 bool *overflow
, bool *underflow
)
2806 return counter
->ops
->counter_read(counter
->counter
, dimension_indexes
, cpu
,
2807 value
, overflow
, underflow
);
2810 int ustctl_counter_aggregate(struct ustctl_daemon_counter
*counter
,
2811 const size_t *dimension_indexes
,
2813 bool *overflow
, bool *underflow
)
2815 return counter
->ops
->counter_aggregate(counter
->counter
, dimension_indexes
,
2816 value
, overflow
, underflow
);
2819 int ustctl_counter_clear(struct ustctl_daemon_counter
*counter
,
2820 const size_t *dimension_indexes
)
2822 return counter
->ops
->counter_clear(counter
->counter
, dimension_indexes
);
2825 static __attribute__((constructor
))
2826 void ustctl_init(void)
2829 lttng_ust_getenv_init(); /* Needs init_usterr() to be completed. */
2830 lttng_ust_clock_init();
2831 lttng_ring_buffer_metadata_client_init();
2832 lttng_ring_buffer_client_overwrite_init();
2833 lttng_ring_buffer_client_overwrite_rt_init();
2834 lttng_ring_buffer_client_discard_init();
2835 lttng_ring_buffer_client_discard_rt_init();
2836 lttng_counter_client_percpu_32_modular_init();
2837 lttng_counter_client_percpu_64_modular_init();
2838 lib_ringbuffer_signal_init();
2841 static __attribute__((destructor
))
2842 void ustctl_exit(void)
2844 lttng_ring_buffer_client_discard_rt_exit();
2845 lttng_ring_buffer_client_discard_exit();
2846 lttng_ring_buffer_client_overwrite_rt_exit();
2847 lttng_ring_buffer_client_overwrite_exit();
2848 lttng_ring_buffer_metadata_client_exit();
2849 lttng_counter_client_percpu_32_modular_exit();
2850 lttng_counter_client_percpu_64_modular_exit();