2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * 2012 - David Goulet <dgoulet@efficios.com>
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License, version 2 only,
8 * as published by the Free Software Foundation.
10 * This program is distributed in the hope that it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
20 #ifndef LIB_CONSUMER_H
21 #define LIB_CONSUMER_H
26 #include <urcu/list.h>
28 #include <lttng/lttng.h>
30 #include <common/hashtable/hashtable.h>
31 #include <common/compat/fcntl.h>
32 #include <common/compat/uuid.h>
33 #include <common/sessiond-comm/sessiond-comm.h>
34 #include <common/pipe.h>
35 #include <common/index/ctf-index.h>
37 /* Commands for consumer */
38 enum lttng_consumer_command
{
39 LTTNG_CONSUMER_ADD_CHANNEL
,
40 LTTNG_CONSUMER_ADD_STREAM
,
41 /* pause, delete, active depending on fd state */
42 LTTNG_CONSUMER_UPDATE_STREAM
,
43 /* inform the consumer to quit when all fd has hang up */
44 LTTNG_CONSUMER_STOP
, /* deprecated */
45 LTTNG_CONSUMER_ADD_RELAYD_SOCKET
,
46 /* Inform the consumer to kill a specific relayd connection */
47 LTTNG_CONSUMER_DESTROY_RELAYD
,
48 /* Return to the sessiond if there is data pending for a session */
49 LTTNG_CONSUMER_DATA_PENDING
,
50 /* Consumer creates a channel and returns it to sessiond. */
51 LTTNG_CONSUMER_ASK_CHANNEL_CREATION
,
52 LTTNG_CONSUMER_GET_CHANNEL
,
53 LTTNG_CONSUMER_DESTROY_CHANNEL
,
54 LTTNG_CONSUMER_PUSH_METADATA
,
55 LTTNG_CONSUMER_CLOSE_METADATA
,
56 LTTNG_CONSUMER_SETUP_METADATA
,
57 LTTNG_CONSUMER_FLUSH_CHANNEL
,
58 LTTNG_CONSUMER_SNAPSHOT_CHANNEL
,
59 LTTNG_CONSUMER_SNAPSHOT_METADATA
,
60 LTTNG_CONSUMER_STREAMS_SENT
,
61 LTTNG_CONSUMER_DISCARDED_EVENTS
,
62 LTTNG_CONSUMER_LOST_PACKETS
,
63 LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL
,
64 LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE
,
68 /* State of each fd in consumer */
69 enum lttng_consumer_stream_state
{
70 LTTNG_CONSUMER_ACTIVE_STREAM
,
71 LTTNG_CONSUMER_PAUSE_STREAM
,
72 LTTNG_CONSUMER_DELETE_STREAM
,
75 enum lttng_consumer_type
{
76 LTTNG_CONSUMER_UNKNOWN
= 0,
77 LTTNG_CONSUMER_KERNEL
,
82 enum consumer_endpoint_status
{
83 CONSUMER_ENDPOINT_ACTIVE
,
84 CONSUMER_ENDPOINT_INACTIVE
,
87 enum consumer_channel_output
{
88 CONSUMER_CHANNEL_MMAP
= 0,
89 CONSUMER_CHANNEL_SPLICE
= 1,
92 enum consumer_channel_type
{
93 CONSUMER_CHANNEL_TYPE_METADATA
= 0,
94 CONSUMER_CHANNEL_TYPE_DATA
= 1,
97 extern struct lttng_consumer_global_data consumer_data
;
100 struct cds_list_head head
;
105 struct consumer_metadata_cache
;
107 struct lttng_consumer_channel
{
108 /* HT node used for consumer_data.channel_ht */
109 struct lttng_ht_node_u64 node
;
110 /* Indexed key. Incremented value in the consumer. */
112 /* Number of streams referencing this channel */
114 /* Tracing session id on the session daemon side. */
117 * Session id when requesting metadata to the session daemon for
118 * a session with per-PID buffers.
120 uint64_t session_id_per_pid
;
121 /* Channel trace file path name. */
122 char pathname
[PATH_MAX
];
124 char name
[LTTNG_SYMBOL_NAME_LEN
];
125 /* UID and GID of the session owning this channel. */
128 /* Relayd id of the channel. -1ULL if it does not apply. */
131 * Number of streams NOT initialized yet. This is used in order to not
132 * delete this channel if streams are getting initialized.
134 unsigned int nb_init_stream_left
;
135 /* Output type (mmap or splice). */
136 enum consumer_channel_output output
;
137 /* Channel type for stream */
138 enum consumer_channel_type type
;
141 uid_t ust_app_uid
; /* Application UID. */
142 struct ustctl_consumer_channel
*uchan
;
143 unsigned char uuid
[UUID_STR_LEN
];
145 * Temporary stream list used to store the streams once created and waiting
146 * to be sent to the session daemon by receiving the
147 * LTTNG_CONSUMER_GET_CHANNEL.
149 struct stream_list streams
;
152 * Set if the channel is metadata. We keep a reference to the stream
153 * because we have to flush data once pushed by the session daemon. For a
154 * regular channel, this is always set to NULL.
156 struct lttng_consumer_stream
*metadata_stream
;
160 /* Node within channel thread ht */
161 struct lttng_ht_node_u64 wait_fd_node
;
163 /* Metadata cache is metadata channel */
164 struct consumer_metadata_cache
*metadata_cache
;
166 /* For UST metadata periodical flush */
167 int switch_timer_enabled
;
168 timer_t switch_timer
;
169 int switch_timer_error
;
171 /* For the live mode */
172 int live_timer_enabled
;
174 int live_timer_error
;
176 /* For channel monitoring timer. */
177 int monitor_timer_enabled
;
178 timer_t monitor_timer
;
180 /* On-disk circular buffer */
181 uint64_t tracefile_size
;
182 uint64_t tracefile_count
;
184 * Monitor or not the streams of this channel meaning this indicates if the
185 * streams should be sent to the data/metadata thread or added to the no
186 * monitor list of the channel.
188 unsigned int monitor
;
193 * This lock protects against concurrent update of channel.
195 * This is nested INSIDE the consumer data lock.
196 * This is nested OUTSIDE the channel timer lock.
197 * This is nested OUTSIDE the metadata cache lock.
198 * This is nested OUTSIDE stream lock.
199 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
201 pthread_mutex_t lock
;
204 * Channel teardown lock.
206 * This lock protect against teardown of channel. It is _never_
207 * taken by the timer handler.
209 * This is nested INSIDE the consumer data lock.
210 * This is nested INSIDE the channel lock.
211 * This is nested OUTSIDE the metadata cache lock.
212 * This is nested OUTSIDE stream lock.
213 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
215 pthread_mutex_t timer_lock
;
217 /* Timer value in usec for live streaming. */
218 unsigned int live_timer_interval
;
222 char root_shm_path
[PATH_MAX
];
223 char shm_path
[PATH_MAX
];
224 /* Total number of discarded events for that channel. */
225 uint64_t discarded_events
;
226 /* Total number of missed packets due to overwriting (overwrite). */
227 uint64_t lost_packets
;
229 bool streams_sent_to_relayd
;
233 * Internal representation of the streams, sessiond_key is used to identify
236 struct lttng_consumer_stream
{
237 /* HT node used by the data_ht and metadata_ht */
238 struct lttng_ht_node_u64 node
;
239 /* stream indexed per channel key node */
240 struct lttng_ht_node_u64 node_channel_id
;
241 /* HT node used in consumer_data.stream_list_ht */
242 struct lttng_ht_node_u64 node_session_id
;
243 /* Pointer to associated channel. */
244 struct lttng_consumer_channel
*chan
;
246 /* Key by which the stream is indexed for 'node'. */
249 * File descriptor of the data output file. This can be either a file or a
250 * socket fd for relayd streaming.
252 int out_fd
; /* output file to write the data */
253 /* Write position in the output file descriptor */
255 /* Amount of bytes written to the output */
256 uint64_t output_written
;
257 enum lttng_consumer_stream_state state
;
260 int hangup_flush_done
;
263 * Whether the stream is in a "complete" state (e.g. it does not have a
264 * partially written sub-buffer.
266 * Initialized to "false" on stream creation (first packet is empty).
268 * The various transitions of the quiescent state are:
269 * - On "start" tracing: set to false, since the stream is not
271 * - On "stop" tracing: if !quiescent -> flush FINAL (update
272 * timestamp_end), and set to true; the stream has entered a
273 * complete/quiescent state.
274 * - On "destroy" or stream/application hang-up: if !quiescent ->
275 * flush FINAL, and set to true.
277 * NOTE: Update and read are protected by the stream lock.
282 * metadata_timer_lock protects flags waiting_on_metadata and
283 * missed_metadata_flush.
285 pthread_mutex_t metadata_timer_lock
;
287 * Flag set when awaiting metadata to be pushed. Used in the
288 * timer thread to skip waiting on the stream (and stream lock) to
289 * ensure we can proceed to flushing metadata in live mode.
291 bool waiting_on_metadata
;
292 /* Raised when a timer misses a metadata flush. */
293 bool missed_metadata_flush
;
295 enum lttng_event_output output
;
296 /* Maximum subbuffer size. */
297 unsigned long max_sb_size
;
300 * Still used by the kernel for MMAP output. For UST, the ustctl getter is
301 * used for the mmap base and offset.
304 unsigned long mmap_len
;
309 /* UID/GID of the user owning the session to which stream belongs */
312 /* Network sequence number. Indicating on which relayd socket it goes. */
313 uint64_t net_seq_idx
;
315 * Indicate if this stream was successfully sent to a relayd. This is set
316 * after the refcount of the relayd is incremented and is checked when the
317 * stream is closed before decrementing the refcount in order to avoid an
320 unsigned int sent_to_relayd
;
322 /* Identify if the stream is the metadata */
323 unsigned int metadata_flag
;
325 * Last known metadata version, reset the metadata file in case
328 uint64_t metadata_version
;
329 /* Used when the stream is set for network streaming */
330 uint64_t relayd_stream_id
;
332 * When sending a stream packet to a relayd, this number is used to track
333 * the packet sent by the consumer and seen by the relayd. When sending the
334 * data header to the relayd, this number is sent and if the transmission
335 * was successful, it is incremented.
337 * Even if the full data is not fully transmitted it won't matter since
338 * only two possible error can happen after that where either the relayd
339 * died or a read error is detected on the stream making this value useless
342 * This value SHOULD be read/updated atomically or with the lock acquired.
344 uint64_t next_net_seq_num
;
346 * Lock to use the stream FDs since they are used between threads.
348 * This is nested INSIDE the consumer_data lock.
349 * This is nested INSIDE the channel lock.
350 * This is nested INSIDE the channel timer lock.
351 * This is nested OUTSIDE the metadata cache lock.
352 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
354 pthread_mutex_t lock
;
355 /* Tracing session id */
358 * Indicates if the stream end point is still active or not (network
359 * streaming or local file system). The thread "owning" the stream is
360 * handling this status and can be notified of a state change through the
361 * consumer data appropriate pipe.
363 enum consumer_endpoint_status endpoint_status
;
364 /* Stream name. Format is: <channel_name>_<cpu_number> */
365 char name
[LTTNG_SYMBOL_NAME_LEN
];
366 /* Internal state of libustctl. */
367 struct ustctl_consumer_stream
*ustream
;
368 struct cds_list_head send_node
;
369 /* On-disk circular buffer */
370 uint64_t tracefile_size_current
;
371 uint64_t tracefile_count_current
;
373 * Monitor or not the streams of this channel meaning this indicates if the
374 * streams should be sent to the data/metadata thread or added to the no
375 * monitor list of the channel.
377 unsigned int monitor
;
379 * Indicate if the stream is globally visible meaning that it has been
380 * added to the multiple hash tables. If *not* set, NO lock should be
381 * acquired in the destroy path.
383 unsigned int globally_visible
;
385 * Pipe to wake up the metadata poll thread when the UST metadata
388 int ust_metadata_poll_pipe
[2];
390 * How much metadata was read from the metadata cache and sent
393 uint64_t ust_metadata_pushed
;
395 * Copy of the last discarded event value to detect the overflow of
398 uint64_t last_discarded_events
;
399 /* Copy of the sequence number of the last packet extracted. */
400 uint64_t last_sequence_number
;
402 * Index file object of the index file for this stream.
404 struct lttng_index_file
*index_file
;
407 * Local pipe to extract data when using splice.
412 * Rendez-vous point between data and metadata stream in live mode.
414 pthread_cond_t metadata_rdv
;
415 pthread_mutex_t metadata_rdv_lock
;
417 /* Indicate if the stream still has some data to be read. */
418 unsigned int has_data
:1;
420 * Inform the consumer or relay to reset the metadata
421 * file before writing in it (regeneration).
423 unsigned int reset_metadata_flag
:1;
427 * Internal representation of a relayd socket pair.
429 struct consumer_relayd_sock_pair
{
430 /* Network sequence number. */
431 uint64_t net_seq_idx
;
432 /* Number of stream associated with this relayd */
433 unsigned int refcount
;
436 * This flag indicates whether or not we should destroy this object. The
437 * destruction should ONLY occurs when this flag is set and the refcount is
440 unsigned int destroy_flag
;
443 * Mutex protecting the control socket to avoid out of order packets
444 * between threads sending data to the relayd. Since metadata data is sent
445 * over that socket, at least two sendmsg() are needed (header + data)
446 * creating a race for packets to overlap between threads using it.
448 * This is nested INSIDE the consumer_data lock.
449 * This is nested INSIDE the stream lock.
451 pthread_mutex_t ctrl_sock_mutex
;
453 /* Control socket. Command and metadata are passed over it */
454 struct lttcomm_relayd_sock control_sock
;
457 * We don't need a mutex at this point since we only splice or write single
458 * large chunk of data with a header appended at the begining. Moreover,
459 * this socket is for now only used in a single thread.
461 struct lttcomm_relayd_sock data_sock
;
462 struct lttng_ht_node_u64 node
;
464 /* Session id on both sides for the sockets. */
465 uint64_t relayd_session_id
;
466 uint64_t sessiond_session_id
;
470 * UST consumer local data to the program. One or more instance per
473 struct lttng_consumer_local_data
{
475 * Function to call when data is available on a buffer.
476 * Returns the number of bytes read, or negative error value.
478 ssize_t (*on_buffer_ready
)(struct lttng_consumer_stream
*stream
,
479 struct lttng_consumer_local_data
*ctx
);
481 * function to call when we receive a new channel, it receives a
482 * newly allocated channel, depending on the return code of this
483 * function, the new channel will be handled by the application
487 * > 0 (success, FD is kept by application)
488 * == 0 (success, FD is left to library)
491 int (*on_recv_channel
)(struct lttng_consumer_channel
*channel
);
493 * function to call when we receive a new stream, it receives a
494 * newly allocated stream, depending on the return code of this
495 * function, the new stream will be handled by the application
499 * > 0 (success, FD is kept by application)
500 * == 0 (success, FD is left to library)
503 int (*on_recv_stream
)(struct lttng_consumer_stream
*stream
);
505 * function to call when a stream is getting updated by the session
506 * daemon, this function receives the sessiond key and the new
507 * state, depending on the return code of this function the
508 * update of state for the stream is handled by the application
512 * > 0 (success, FD is kept by application)
513 * == 0 (success, FD is left to library)
516 int (*on_update_stream
)(uint64_t sessiond_key
, uint32_t state
);
517 enum lttng_consumer_type type
;
518 /* socket to communicate errors with sessiond */
519 int consumer_error_socket
;
520 /* socket to ask metadata to sessiond. */
521 int consumer_metadata_socket
;
523 * Protect consumer_metadata_socket.
525 * This is nested OUTSIDE the metadata cache lock.
527 pthread_mutex_t metadata_socket_lock
;
528 /* socket to exchange commands with sessiond */
529 char *consumer_command_sock_path
;
530 /* communication with splice */
531 int consumer_channel_pipe
[2];
532 /* Data stream poll thread pipe. To transfer data stream to the thread */
533 struct lttng_pipe
*consumer_data_pipe
;
536 * Data thread use that pipe to catch wakeup from read subbuffer that
537 * detects that there is still data to be read for the stream encountered.
538 * Before doing so, the stream is flagged to indicate that there is still
541 * Both pipes (read/write) are owned and used inside the data thread.
543 struct lttng_pipe
*consumer_wakeup_pipe
;
544 /* Indicate if the wakeup thread has been notified. */
545 unsigned int has_wakeup
:1;
547 /* to let the signal handler wake up the fd receiver thread */
548 int consumer_should_quit
[2];
549 /* Metadata poll thread pipe. Transfer metadata stream to it */
550 struct lttng_pipe
*consumer_metadata_pipe
;
552 * Pipe used by the channel monitoring timers to provide state samples
553 * to the session daemon (write-only).
555 int channel_monitor_pipe
;
559 * Library-level data. One instance per process.
561 struct lttng_consumer_global_data
{
563 * At this time, this lock is used to ensure coherence between the count
564 * and number of element in the hash table. It's also a protection for
565 * concurrent read/write between threads.
567 * This is nested OUTSIDE the stream lock.
568 * This is nested OUTSIDE the consumer_relayd_sock_pair lock.
570 pthread_mutex_t lock
;
573 * Number of streams in the data stream hash table declared outside.
574 * Protected by consumer_data.lock.
578 /* Channel hash table protected by consumer_data.lock. */
579 struct lttng_ht
*channel_ht
;
581 * Flag specifying if the local array of FDs needs update in the
582 * poll function. Protected by consumer_data.lock.
584 unsigned int need_update
;
585 enum lttng_consumer_type type
;
588 * Relayd socket(s) hashtable indexed by network sequence number. Each
589 * stream has an index which associate the right relayd socket to use.
591 struct lttng_ht
*relayd_ht
;
594 * This hash table contains all streams (metadata and data) indexed by
595 * session id. In other words, the ht is indexed by session id and each
596 * bucket contains the list of associated streams.
598 * This HT uses the "node_session_id" of the consumer stream.
600 struct lttng_ht
*stream_list_ht
;
603 * This HT uses the "node_channel_id" of the consumer stream.
605 struct lttng_ht
*stream_per_chan_id_ht
;
609 * Set to nonzero when the consumer is exiting. Updated by signal
610 * handler and thread exit, read by threads.
612 extern int consumer_quit
;
615 * Set to nonzero when the consumer is exiting. Updated by signal
616 * handler and thread exit, read by threads.
618 extern int consumer_quit
;
620 /* Flag used to temporarily pause data consumption from testpoints. */
621 extern int data_consumption_paused
;
624 * Init consumer data structures.
626 int lttng_consumer_init(void);
629 * Set the error socket for communication with a session daemon.
631 void lttng_consumer_set_error_sock(struct lttng_consumer_local_data
*ctx
,
635 * Set the command socket path for communication with a session daemon.
637 void lttng_consumer_set_command_sock_path(
638 struct lttng_consumer_local_data
*ctx
, char *sock
);
641 * Send return code to session daemon.
643 * Returns the return code of sendmsg : the number of bytes transmitted or -1
646 int lttng_consumer_send_error(struct lttng_consumer_local_data
*ctx
, int cmd
);
649 * Called from signal handler to ensure a clean exit.
651 void lttng_consumer_should_exit(struct lttng_consumer_local_data
*ctx
);
654 * Cleanup the daemon's socket on exit.
656 void lttng_consumer_cleanup(void);
659 * Poll on the should_quit pipe and the command socket return -1 on error and
660 * should exit, 0 if data is available on the command socket
662 int lttng_consumer_poll_socket(struct pollfd
*kconsumer_sockpoll
);
664 struct lttng_consumer_stream
*consumer_allocate_stream(uint64_t channel_key
,
666 enum lttng_consumer_stream_state state
,
667 const char *channel_name
,
674 enum consumer_channel_type type
,
675 unsigned int monitor
);
676 struct lttng_consumer_channel
*consumer_allocate_channel(uint64_t key
,
678 const char *pathname
,
683 enum lttng_event_output output
,
684 uint64_t tracefile_size
,
685 uint64_t tracefile_count
,
686 uint64_t session_id_per_pid
,
687 unsigned int monitor
,
688 unsigned int live_timer_interval
,
689 const char *root_shm_path
,
690 const char *shm_path
);
691 void consumer_del_stream(struct lttng_consumer_stream
*stream
,
692 struct lttng_ht
*ht
);
693 void consumer_del_metadata_stream(struct lttng_consumer_stream
*stream
,
694 struct lttng_ht
*ht
);
695 int consumer_add_channel(struct lttng_consumer_channel
*channel
,
696 struct lttng_consumer_local_data
*ctx
);
697 void consumer_del_channel(struct lttng_consumer_channel
*channel
);
699 /* lttng-relayd consumer command */
700 struct consumer_relayd_sock_pair
*consumer_find_relayd(uint64_t key
);
701 int consumer_send_relayd_stream(struct lttng_consumer_stream
*stream
, char *path
);
702 int consumer_send_relayd_streams_sent(uint64_t net_seq_idx
);
703 void close_relayd_stream(struct lttng_consumer_stream
*stream
);
704 struct lttng_consumer_channel
*consumer_find_channel(uint64_t key
);
705 int consumer_handle_stream_before_relayd(struct lttng_consumer_stream
*stream
,
707 void consumer_steal_stream_key(int key
, struct lttng_ht
*ht
);
709 struct lttng_consumer_local_data
*lttng_consumer_create(
710 enum lttng_consumer_type type
,
711 ssize_t (*buffer_ready
)(struct lttng_consumer_stream
*stream
,
712 struct lttng_consumer_local_data
*ctx
),
713 int (*recv_channel
)(struct lttng_consumer_channel
*channel
),
714 int (*recv_stream
)(struct lttng_consumer_stream
*stream
),
715 int (*update_stream
)(uint64_t sessiond_key
, uint32_t state
));
716 void lttng_consumer_destroy(struct lttng_consumer_local_data
*ctx
);
717 ssize_t
lttng_consumer_on_read_subbuffer_mmap(
718 struct lttng_consumer_local_data
*ctx
,
719 struct lttng_consumer_stream
*stream
, unsigned long len
,
720 unsigned long padding
,
721 struct ctf_packet_index
*index
);
722 ssize_t
lttng_consumer_on_read_subbuffer_splice(
723 struct lttng_consumer_local_data
*ctx
,
724 struct lttng_consumer_stream
*stream
, unsigned long len
,
725 unsigned long padding
,
726 struct ctf_packet_index
*index
);
727 int lttng_consumer_take_snapshot(struct lttng_consumer_stream
*stream
);
728 int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream
*stream
,
730 int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream
*stream
);
731 int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream
*stream
);
732 void *consumer_thread_metadata_poll(void *data
);
733 void *consumer_thread_data_poll(void *data
);
734 void *consumer_thread_sessiond_poll(void *data
);
735 void *consumer_thread_channel_poll(void *data
);
736 int lttng_consumer_recv_cmd(struct lttng_consumer_local_data
*ctx
,
737 int sock
, struct pollfd
*consumer_sockpoll
);
739 ssize_t
lttng_consumer_read_subbuffer(struct lttng_consumer_stream
*stream
,
740 struct lttng_consumer_local_data
*ctx
);
741 int lttng_consumer_on_recv_stream(struct lttng_consumer_stream
*stream
);
742 void consumer_add_relayd_socket(uint64_t net_seq_idx
, int sock_type
,
743 struct lttng_consumer_local_data
*ctx
, int sock
,
744 struct pollfd
*consumer_sockpoll
, struct lttcomm_relayd_sock
*relayd_sock
,
745 uint64_t sessiond_id
, uint64_t relayd_session_id
);
746 void consumer_flag_relayd_for_destroy(
747 struct consumer_relayd_sock_pair
*relayd
);
748 int consumer_data_pending(uint64_t id
);
749 int consumer_send_status_msg(int sock
, int ret_code
);
750 int consumer_send_status_channel(int sock
,
751 struct lttng_consumer_channel
*channel
);
752 void notify_thread_del_channel(struct lttng_consumer_local_data
*ctx
,
754 void consumer_destroy_relayd(struct consumer_relayd_sock_pair
*relayd
);
755 unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos
,
756 unsigned long produced_pos
, uint64_t nb_packets_per_stream
,
757 uint64_t max_sb_size
);
758 void consumer_add_data_stream(struct lttng_consumer_stream
*stream
);
759 void consumer_del_stream_for_data(struct lttng_consumer_stream
*stream
);
760 void consumer_add_metadata_stream(struct lttng_consumer_stream
*stream
);
761 void consumer_del_stream_for_metadata(struct lttng_consumer_stream
*stream
);
762 int consumer_create_index_file(struct lttng_consumer_stream
*stream
);
763 int lttng_consumer_mkdir(const char *path
, uid_t uid
, gid_t gid
,
766 #endif /* LIB_CONSUMER_H */