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
,
66 /* State of each fd in consumer */
67 enum lttng_consumer_stream_state
{
68 LTTNG_CONSUMER_ACTIVE_STREAM
,
69 LTTNG_CONSUMER_PAUSE_STREAM
,
70 LTTNG_CONSUMER_DELETE_STREAM
,
73 enum lttng_consumer_type
{
74 LTTNG_CONSUMER_UNKNOWN
= 0,
75 LTTNG_CONSUMER_KERNEL
,
80 enum consumer_endpoint_status
{
81 CONSUMER_ENDPOINT_ACTIVE
,
82 CONSUMER_ENDPOINT_INACTIVE
,
85 enum consumer_channel_output
{
86 CONSUMER_CHANNEL_MMAP
= 0,
87 CONSUMER_CHANNEL_SPLICE
= 1,
90 enum consumer_channel_type
{
91 CONSUMER_CHANNEL_TYPE_METADATA
= 0,
92 CONSUMER_CHANNEL_TYPE_DATA
= 1,
95 extern struct lttng_consumer_global_data consumer_data
;
98 struct cds_list_head head
;
103 struct consumer_metadata_cache
;
105 struct lttng_consumer_channel
{
106 /* HT node used for consumer_data.channel_ht */
107 struct lttng_ht_node_u64 node
;
108 /* Indexed key. Incremented value in the consumer. */
110 /* Number of streams referencing this channel */
112 /* Tracing session id on the session daemon side. */
115 * Session id when requesting metadata to the session daemon for
116 * a session with per-PID buffers.
118 uint64_t session_id_per_pid
;
119 /* Channel trace file path name. */
120 char pathname
[PATH_MAX
];
122 char name
[LTTNG_SYMBOL_NAME_LEN
];
123 /* UID and GID of the session owning this channel. */
126 /* Relayd id of the channel. -1ULL if it does not apply. */
129 * Number of streams NOT initialized yet. This is used in order to not
130 * delete this channel if streams are getting initialized.
132 unsigned int nb_init_stream_left
;
133 /* Output type (mmap or splice). */
134 enum consumer_channel_output output
;
135 /* Channel type for stream */
136 enum consumer_channel_type type
;
139 uid_t ust_app_uid
; /* Application UID. */
140 struct ustctl_consumer_channel
*uchan
;
141 unsigned char uuid
[UUID_STR_LEN
];
143 * Temporary stream list used to store the streams once created and waiting
144 * to be sent to the session daemon by receiving the
145 * LTTNG_CONSUMER_GET_CHANNEL.
147 struct stream_list streams
;
150 * Set if the channel is metadata. We keep a reference to the stream
151 * because we have to flush data once pushed by the session daemon. For a
152 * regular channel, this is always set to NULL.
154 struct lttng_consumer_stream
*metadata_stream
;
158 /* Node within channel thread ht */
159 struct lttng_ht_node_u64 wait_fd_node
;
161 /* Metadata cache is metadata channel */
162 struct consumer_metadata_cache
*metadata_cache
;
163 /* For UST metadata periodical flush */
164 int switch_timer_enabled
;
165 timer_t switch_timer
;
166 int switch_timer_error
;
168 /* For the live mode */
169 int live_timer_enabled
;
171 int live_timer_error
;
173 /* On-disk circular buffer */
174 uint64_t tracefile_size
;
175 uint64_t tracefile_count
;
177 * Monitor or not the streams of this channel meaning this indicates if the
178 * streams should be sent to the data/metadata thread or added to the no
179 * monitor list of the channel.
181 unsigned int monitor
;
186 * This lock protects against concurrent update of channel.
188 * This is nested INSIDE the consumer data lock.
189 * This is nested OUTSIDE the channel timer lock.
190 * This is nested OUTSIDE the metadata cache lock.
191 * This is nested OUTSIDE stream lock.
192 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
194 pthread_mutex_t lock
;
197 * Channel teardown lock.
199 * This lock protect against teardown of channel. It is _never_
200 * taken by the timer handler.
202 * This is nested INSIDE the consumer data lock.
203 * This is nested INSIDE the channel lock.
204 * This is nested OUTSIDE the metadata cache lock.
205 * This is nested OUTSIDE stream lock.
206 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
208 pthread_mutex_t timer_lock
;
210 /* Timer value in usec for live streaming. */
211 unsigned int live_timer_interval
;
215 char root_shm_path
[PATH_MAX
];
216 char shm_path
[PATH_MAX
];
217 /* Total number of discarded events for that channel. */
218 uint64_t discarded_events
;
219 /* Total number of missed packets due to overwriting (overwrite). */
220 uint64_t lost_packets
;
222 bool streams_sent_to_relayd
;
226 * Internal representation of the streams, sessiond_key is used to identify
229 struct lttng_consumer_stream
{
230 /* HT node used by the data_ht and metadata_ht */
231 struct lttng_ht_node_u64 node
;
232 /* stream indexed per channel key node */
233 struct lttng_ht_node_u64 node_channel_id
;
234 /* HT node used in consumer_data.stream_list_ht */
235 struct lttng_ht_node_u64 node_session_id
;
236 /* Pointer to associated channel. */
237 struct lttng_consumer_channel
*chan
;
239 /* Key by which the stream is indexed for 'node'. */
242 * File descriptor of the data output file. This can be either a file or a
243 * socket fd for relayd streaming.
245 int out_fd
; /* output file to write the data */
246 /* Write position in the output file descriptor */
248 /* Amount of bytes written to the output */
249 uint64_t output_written
;
250 enum lttng_consumer_stream_state state
;
253 int hangup_flush_done
;
256 * Whether the stream is in a "complete" state (e.g. it does not have a
257 * partially written sub-buffer.
259 * Initialized to "false" on stream creation (first packet is empty).
261 * The various transitions of the quiescent state are:
262 * - On "start" tracing: set to false, since the stream is not
264 * - On "stop" tracing: if !quiescent -> flush FINAL (update
265 * timestamp_end), and set to true; the stream has entered a
266 * complete/quiescent state.
267 * - On "destroy" or stream/application hang-up: if !quiescent ->
268 * flush FINAL, and set to true.
270 * NOTE: Update and read are protected by the stream lock.
275 * metadata_timer_lock protects flags waiting_on_metadata and
276 * missed_metadata_flush.
278 pthread_mutex_t metadata_timer_lock
;
280 * Flag set when awaiting metadata to be pushed. Used in the
281 * timer thread to skip waiting on the stream (and stream lock) to
282 * ensure we can proceed to flushing metadata in live mode.
284 bool waiting_on_metadata
;
285 /* Raised when a timer misses a metadata flush. */
286 bool missed_metadata_flush
;
288 enum lttng_event_output output
;
289 /* Maximum subbuffer size. */
290 unsigned long max_sb_size
;
293 * Still used by the kernel for MMAP output. For UST, the ustctl getter is
294 * used for the mmap base and offset.
297 unsigned long mmap_len
;
302 /* UID/GID of the user owning the session to which stream belongs */
305 /* Network sequence number. Indicating on which relayd socket it goes. */
306 uint64_t net_seq_idx
;
308 * Indicate if this stream was successfully sent to a relayd. This is set
309 * after the refcount of the relayd is incremented and is checked when the
310 * stream is closed before decrementing the refcount in order to avoid an
313 unsigned int sent_to_relayd
;
315 /* Identify if the stream is the metadata */
316 unsigned int metadata_flag
;
318 * Last known metadata version, reset the metadata file in case
321 uint64_t metadata_version
;
322 /* Used when the stream is set for network streaming */
323 uint64_t relayd_stream_id
;
325 * When sending a stream packet to a relayd, this number is used to track
326 * the packet sent by the consumer and seen by the relayd. When sending the
327 * data header to the relayd, this number is sent and if the transmission
328 * was successful, it is incremented.
330 * Even if the full data is not fully transmitted it won't matter since
331 * only two possible error can happen after that where either the relayd
332 * died or a read error is detected on the stream making this value useless
335 * This value SHOULD be read/updated atomically or with the lock acquired.
337 uint64_t next_net_seq_num
;
339 * Lock to use the stream FDs since they are used between threads.
341 * This is nested INSIDE the consumer_data lock.
342 * This is nested INSIDE the channel lock.
343 * This is nested INSIDE the channel timer lock.
344 * This is nested OUTSIDE the metadata cache lock.
345 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
347 pthread_mutex_t lock
;
348 /* Tracing session id */
351 * Indicates if the stream end point is still active or not (network
352 * streaming or local file system). The thread "owning" the stream is
353 * handling this status and can be notified of a state change through the
354 * consumer data appropriate pipe.
356 enum consumer_endpoint_status endpoint_status
;
357 /* Stream name. Format is: <channel_name>_<cpu_number> */
358 char name
[LTTNG_SYMBOL_NAME_LEN
];
359 /* Internal state of libustctl. */
360 struct ustctl_consumer_stream
*ustream
;
361 struct cds_list_head send_node
;
362 /* On-disk circular buffer */
363 uint64_t tracefile_size_current
;
364 uint64_t tracefile_count_current
;
366 * Monitor or not the streams of this channel meaning this indicates if the
367 * streams should be sent to the data/metadata thread or added to the no
368 * monitor list of the channel.
370 unsigned int monitor
;
372 * Indicate if the stream is globally visible meaning that it has been
373 * added to the multiple hash tables. If *not* set, NO lock should be
374 * acquired in the destroy path.
376 unsigned int globally_visible
;
378 * Pipe to wake up the metadata poll thread when the UST metadata
381 int ust_metadata_poll_pipe
[2];
383 * How much metadata was read from the metadata cache and sent
386 uint64_t ust_metadata_pushed
;
388 * Copy of the last discarded event value to detect the overflow of
391 uint64_t last_discarded_events
;
392 /* Copy of the sequence number of the last packet extracted. */
393 uint64_t last_sequence_number
;
395 * Index file object of the index file for this stream.
397 struct lttng_index_file
*index_file
;
400 * Local pipe to extract data when using splice.
405 * Rendez-vous point between data and metadata stream in live mode.
407 pthread_cond_t metadata_rdv
;
408 pthread_mutex_t metadata_rdv_lock
;
410 /* Indicate if the stream still has some data to be read. */
411 unsigned int has_data
:1;
413 * Inform the consumer or relay to reset the metadata
414 * file before writing in it (regeneration).
416 unsigned int reset_metadata_flag
:1;
420 * Internal representation of a relayd socket pair.
422 struct consumer_relayd_sock_pair
{
423 /* Network sequence number. */
424 uint64_t net_seq_idx
;
425 /* Number of stream associated with this relayd */
426 unsigned int refcount
;
429 * This flag indicates whether or not we should destroy this object. The
430 * destruction should ONLY occurs when this flag is set and the refcount is
433 unsigned int destroy_flag
;
436 * Mutex protecting the control socket to avoid out of order packets
437 * between threads sending data to the relayd. Since metadata data is sent
438 * over that socket, at least two sendmsg() are needed (header + data)
439 * creating a race for packets to overlap between threads using it.
441 * This is nested INSIDE the consumer_data lock.
442 * This is nested INSIDE the stream lock.
444 pthread_mutex_t ctrl_sock_mutex
;
446 /* Control socket. Command and metadata are passed over it */
447 struct lttcomm_relayd_sock control_sock
;
450 * We don't need a mutex at this point since we only splice or write single
451 * large chunk of data with a header appended at the begining. Moreover,
452 * this socket is for now only used in a single thread.
454 struct lttcomm_relayd_sock data_sock
;
455 struct lttng_ht_node_u64 node
;
457 /* Session id on both sides for the sockets. */
458 uint64_t relayd_session_id
;
459 uint64_t sessiond_session_id
;
463 * UST consumer local data to the program. One or more instance per
466 struct lttng_consumer_local_data
{
468 * Function to call when data is available on a buffer.
469 * Returns the number of bytes read, or negative error value.
471 ssize_t (*on_buffer_ready
)(struct lttng_consumer_stream
*stream
,
472 struct lttng_consumer_local_data
*ctx
);
474 * function to call when we receive a new channel, it receives a
475 * newly allocated channel, depending on the return code of this
476 * function, the new channel will be handled by the application
480 * > 0 (success, FD is kept by application)
481 * == 0 (success, FD is left to library)
484 int (*on_recv_channel
)(struct lttng_consumer_channel
*channel
);
486 * function to call when we receive a new stream, it receives a
487 * newly allocated stream, depending on the return code of this
488 * function, the new stream will be handled by the application
492 * > 0 (success, FD is kept by application)
493 * == 0 (success, FD is left to library)
496 int (*on_recv_stream
)(struct lttng_consumer_stream
*stream
);
498 * function to call when a stream is getting updated by the session
499 * daemon, this function receives the sessiond key and the new
500 * state, depending on the return code of this function the
501 * update of state for the stream is handled by the application
505 * > 0 (success, FD is kept by application)
506 * == 0 (success, FD is left to library)
509 int (*on_update_stream
)(uint64_t sessiond_key
, uint32_t state
);
510 enum lttng_consumer_type type
;
511 /* socket to communicate errors with sessiond */
512 int consumer_error_socket
;
513 /* socket to ask metadata to sessiond. */
514 int consumer_metadata_socket
;
516 * Protect consumer_metadata_socket.
518 * This is nested OUTSIDE the metadata cache lock.
520 pthread_mutex_t metadata_socket_lock
;
521 /* socket to exchange commands with sessiond */
522 char *consumer_command_sock_path
;
523 /* communication with splice */
524 int consumer_channel_pipe
[2];
525 /* Data stream poll thread pipe. To transfer data stream to the thread */
526 struct lttng_pipe
*consumer_data_pipe
;
529 * Data thread use that pipe to catch wakeup from read subbuffer that
530 * detects that there is still data to be read for the stream encountered.
531 * Before doing so, the stream is flagged to indicate that there is still
534 * Both pipes (read/write) are owned and used inside the data thread.
536 struct lttng_pipe
*consumer_wakeup_pipe
;
537 /* Indicate if the wakeup thread has been notified. */
538 unsigned int has_wakeup
:1;
540 /* to let the signal handler wake up the fd receiver thread */
541 int consumer_should_quit
[2];
542 /* Metadata poll thread pipe. Transfer metadata stream to it */
543 struct lttng_pipe
*consumer_metadata_pipe
;
547 * Library-level data. One instance per process.
549 struct lttng_consumer_global_data
{
551 * At this time, this lock is used to ensure coherence between the count
552 * and number of element in the hash table. It's also a protection for
553 * concurrent read/write between threads.
555 * This is nested OUTSIDE the stream lock.
556 * This is nested OUTSIDE the consumer_relayd_sock_pair lock.
558 pthread_mutex_t lock
;
561 * Number of streams in the data stream hash table declared outside.
562 * Protected by consumer_data.lock.
566 /* Channel hash table protected by consumer_data.lock. */
567 struct lttng_ht
*channel_ht
;
569 * Flag specifying if the local array of FDs needs update in the
570 * poll function. Protected by consumer_data.lock.
572 unsigned int need_update
;
573 enum lttng_consumer_type type
;
576 * Relayd socket(s) hashtable indexed by network sequence number. Each
577 * stream has an index which associate the right relayd socket to use.
579 struct lttng_ht
*relayd_ht
;
582 * This hash table contains all streams (metadata and data) indexed by
583 * session id. In other words, the ht is indexed by session id and each
584 * bucket contains the list of associated streams.
586 * This HT uses the "node_session_id" of the consumer stream.
588 struct lttng_ht
*stream_list_ht
;
591 * This HT uses the "node_channel_id" of the consumer stream.
593 struct lttng_ht
*stream_per_chan_id_ht
;
597 * Set to nonzero when the consumer is exiting. Updated by signal
598 * handler and thread exit, read by threads.
600 extern volatile int consumer_quit
;
603 * Init consumer data structures.
605 int lttng_consumer_init(void);
608 * Set the error socket for communication with a session daemon.
610 void lttng_consumer_set_error_sock(struct lttng_consumer_local_data
*ctx
,
614 * Set the command socket path for communication with a session daemon.
616 void lttng_consumer_set_command_sock_path(
617 struct lttng_consumer_local_data
*ctx
, char *sock
);
620 * Send return code to session daemon.
622 * Returns the return code of sendmsg : the number of bytes transmitted or -1
625 int lttng_consumer_send_error(struct lttng_consumer_local_data
*ctx
, int cmd
);
628 * Called from signal handler to ensure a clean exit.
630 void lttng_consumer_should_exit(struct lttng_consumer_local_data
*ctx
);
633 * Cleanup the daemon's socket on exit.
635 void lttng_consumer_cleanup(void);
638 * Poll on the should_quit pipe and the command socket return -1 on error and
639 * should exit, 0 if data is available on the command socket
641 int lttng_consumer_poll_socket(struct pollfd
*kconsumer_sockpoll
);
643 struct lttng_consumer_stream
*consumer_allocate_stream(uint64_t channel_key
,
645 enum lttng_consumer_stream_state state
,
646 const char *channel_name
,
653 enum consumer_channel_type type
,
654 unsigned int monitor
);
655 struct lttng_consumer_channel
*consumer_allocate_channel(uint64_t key
,
657 const char *pathname
,
662 enum lttng_event_output output
,
663 uint64_t tracefile_size
,
664 uint64_t tracefile_count
,
665 uint64_t session_id_per_pid
,
666 unsigned int monitor
,
667 unsigned int live_timer_interval
,
668 const char *root_shm_path
,
669 const char *shm_path
);
670 void consumer_del_stream(struct lttng_consumer_stream
*stream
,
671 struct lttng_ht
*ht
);
672 void consumer_del_metadata_stream(struct lttng_consumer_stream
*stream
,
673 struct lttng_ht
*ht
);
674 int consumer_add_channel(struct lttng_consumer_channel
*channel
,
675 struct lttng_consumer_local_data
*ctx
);
676 void consumer_del_channel(struct lttng_consumer_channel
*channel
);
678 /* lttng-relayd consumer command */
679 struct consumer_relayd_sock_pair
*consumer_find_relayd(uint64_t key
);
680 int consumer_send_relayd_stream(struct lttng_consumer_stream
*stream
, char *path
);
681 int consumer_send_relayd_streams_sent(uint64_t net_seq_idx
);
682 void close_relayd_stream(struct lttng_consumer_stream
*stream
);
683 struct lttng_consumer_channel
*consumer_find_channel(uint64_t key
);
684 int consumer_handle_stream_before_relayd(struct lttng_consumer_stream
*stream
,
686 void consumer_steal_stream_key(int key
, struct lttng_ht
*ht
);
688 struct lttng_consumer_local_data
*lttng_consumer_create(
689 enum lttng_consumer_type type
,
690 ssize_t (*buffer_ready
)(struct lttng_consumer_stream
*stream
,
691 struct lttng_consumer_local_data
*ctx
),
692 int (*recv_channel
)(struct lttng_consumer_channel
*channel
),
693 int (*recv_stream
)(struct lttng_consumer_stream
*stream
),
694 int (*update_stream
)(uint64_t sessiond_key
, uint32_t state
));
695 void lttng_consumer_destroy(struct lttng_consumer_local_data
*ctx
);
696 ssize_t
lttng_consumer_on_read_subbuffer_mmap(
697 struct lttng_consumer_local_data
*ctx
,
698 struct lttng_consumer_stream
*stream
, unsigned long len
,
699 unsigned long padding
,
700 struct ctf_packet_index
*index
);
701 ssize_t
lttng_consumer_on_read_subbuffer_splice(
702 struct lttng_consumer_local_data
*ctx
,
703 struct lttng_consumer_stream
*stream
, unsigned long len
,
704 unsigned long padding
,
705 struct ctf_packet_index
*index
);
706 int lttng_consumer_take_snapshot(struct lttng_consumer_stream
*stream
);
707 int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream
*stream
,
709 int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream
*stream
);
710 int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream
*stream
);
711 void *consumer_thread_metadata_poll(void *data
);
712 void *consumer_thread_data_poll(void *data
);
713 void *consumer_thread_sessiond_poll(void *data
);
714 void *consumer_thread_channel_poll(void *data
);
715 int lttng_consumer_recv_cmd(struct lttng_consumer_local_data
*ctx
,
716 int sock
, struct pollfd
*consumer_sockpoll
);
718 ssize_t
lttng_consumer_read_subbuffer(struct lttng_consumer_stream
*stream
,
719 struct lttng_consumer_local_data
*ctx
);
720 int lttng_consumer_on_recv_stream(struct lttng_consumer_stream
*stream
);
721 int consumer_add_relayd_socket(uint64_t net_seq_idx
, int sock_type
,
722 struct lttng_consumer_local_data
*ctx
, int sock
,
723 struct pollfd
*consumer_sockpoll
, struct lttcomm_relayd_sock
*relayd_sock
,
724 uint64_t sessiond_id
, uint64_t relayd_session_id
);
725 void consumer_flag_relayd_for_destroy(
726 struct consumer_relayd_sock_pair
*relayd
);
727 int consumer_data_pending(uint64_t id
);
728 int consumer_send_status_msg(int sock
, int ret_code
);
729 int consumer_send_status_channel(int sock
,
730 struct lttng_consumer_channel
*channel
);
731 void notify_thread_del_channel(struct lttng_consumer_local_data
*ctx
,
733 void consumer_destroy_relayd(struct consumer_relayd_sock_pair
*relayd
);
734 unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos
,
735 unsigned long produced_pos
, uint64_t nb_packets_per_stream
,
736 uint64_t max_sb_size
);
737 int consumer_add_data_stream(struct lttng_consumer_stream
*stream
);
738 void consumer_del_stream_for_data(struct lttng_consumer_stream
*stream
);
739 int consumer_add_metadata_stream(struct lttng_consumer_stream
*stream
);
740 void consumer_del_stream_for_metadata(struct lttng_consumer_stream
*stream
);
741 int consumer_create_index_file(struct lttng_consumer_stream
*stream
);
743 #endif /* LIB_CONSUMER_H */