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
;
224 * Internal representation of the streams, sessiond_key is used to identify
227 struct lttng_consumer_stream
{
228 /* HT node used by the data_ht and metadata_ht */
229 struct lttng_ht_node_u64 node
;
230 /* stream indexed per channel key node */
231 struct lttng_ht_node_u64 node_channel_id
;
232 /* HT node used in consumer_data.stream_list_ht */
233 struct lttng_ht_node_u64 node_session_id
;
234 /* Pointer to associated channel. */
235 struct lttng_consumer_channel
*chan
;
237 /* Key by which the stream is indexed for 'node'. */
240 * File descriptor of the data output file. This can be either a file or a
241 * socket fd for relayd streaming.
243 int out_fd
; /* output file to write the data */
244 /* Write position in the output file descriptor */
246 /* Amount of bytes written to the output */
247 uint64_t output_written
;
248 enum lttng_consumer_stream_state state
;
251 int hangup_flush_done
;
254 * Whether the stream is in a "complete" state (e.g. it does not have a
255 * partially written sub-buffer.
257 * Initialized to "false" on stream creation (first packet is empty).
259 * The various transitions of the quiescent state are:
260 * - On "start" tracing: set to false, since the stream is not
262 * - On "stop" tracing: if !quiescent -> flush FINAL (update
263 * timestamp_end), and set to true; the stream has entered a
264 * complete/quiescent state.
265 * - On "destroy" or stream/application hang-up: if !quiescent ->
266 * flush FINAL, and set to true.
268 * NOTE: Update and read are protected by the stream lock.
273 * metadata_timer_lock protects flags waiting_on_metadata and
274 * missed_metadata_flush.
276 pthread_mutex_t metadata_timer_lock
;
278 * Flag set when awaiting metadata to be pushed. Used in the
279 * timer thread to skip waiting on the stream (and stream lock) to
280 * ensure we can proceed to flushing metadata in live mode.
282 bool waiting_on_metadata
;
283 /* Raised when a timer misses a metadata flush. */
284 bool missed_metadata_flush
;
286 enum lttng_event_output output
;
287 /* Maximum subbuffer size. */
288 unsigned long max_sb_size
;
291 * Still used by the kernel for MMAP output. For UST, the ustctl getter is
292 * used for the mmap base and offset.
295 unsigned long mmap_len
;
300 /* UID/GID of the user owning the session to which stream belongs */
303 /* Network sequence number. Indicating on which relayd socket it goes. */
304 uint64_t net_seq_idx
;
306 * Indicate if this stream was successfully sent to a relayd. This is set
307 * after the refcount of the relayd is incremented and is checked when the
308 * stream is closed before decrementing the refcount in order to avoid an
311 unsigned int sent_to_relayd
;
313 /* Identify if the stream is the metadata */
314 unsigned int metadata_flag
;
316 * Last known metadata version, reset the metadata file in case
319 uint64_t metadata_version
;
320 /* Used when the stream is set for network streaming */
321 uint64_t relayd_stream_id
;
323 * When sending a stream packet to a relayd, this number is used to track
324 * the packet sent by the consumer and seen by the relayd. When sending the
325 * data header to the relayd, this number is sent and if the transmission
326 * was successful, it is incremented.
328 * Even if the full data is not fully transmitted it won't matter since
329 * only two possible error can happen after that where either the relayd
330 * died or a read error is detected on the stream making this value useless
333 * This value SHOULD be read/updated atomically or with the lock acquired.
335 uint64_t next_net_seq_num
;
337 * Lock to use the stream FDs since they are used between threads.
339 * This is nested INSIDE the consumer_data lock.
340 * This is nested INSIDE the metadata cache lock.
341 * This is nested INSIDE the channel lock.
342 * This is nested INSIDE the channel timer lock.
343 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
345 pthread_mutex_t lock
;
346 /* Tracing session id */
349 * Indicates if the stream end point is still active or not (network
350 * streaming or local file system). The thread "owning" the stream is
351 * handling this status and can be notified of a state change through the
352 * consumer data appropriate pipe.
354 enum consumer_endpoint_status endpoint_status
;
355 /* Stream name. Format is: <channel_name>_<cpu_number> */
356 char name
[LTTNG_SYMBOL_NAME_LEN
];
357 /* Internal state of libustctl. */
358 struct ustctl_consumer_stream
*ustream
;
359 struct cds_list_head send_node
;
360 /* On-disk circular buffer */
361 uint64_t tracefile_size_current
;
362 uint64_t tracefile_count_current
;
364 * Monitor or not the streams of this channel meaning this indicates if the
365 * streams should be sent to the data/metadata thread or added to the no
366 * monitor list of the channel.
368 unsigned int monitor
;
370 * Indicate if the stream is globally visible meaning that it has been
371 * added to the multiple hash tables. If *not* set, NO lock should be
372 * acquired in the destroy path.
374 unsigned int globally_visible
;
376 * Pipe to wake up the metadata poll thread when the UST metadata
379 int ust_metadata_poll_pipe
[2];
381 * How much metadata was read from the metadata cache and sent
384 uint64_t ust_metadata_pushed
;
386 * Copy of the last discarded event value to detect the overflow of
389 uint64_t last_discarded_events
;
390 /* Copy of the sequence number of the last packet extracted. */
391 uint64_t last_sequence_number
;
393 * FD of the index file for this stream.
398 * Local pipe to extract data when using splice.
403 * Rendez-vous point between data and metadata stream in live mode.
405 pthread_cond_t metadata_rdv
;
406 pthread_mutex_t metadata_rdv_lock
;
408 /* Indicate if the stream still has some data to be read. */
409 unsigned int has_data
:1;
411 * Inform the consumer or relay to reset the metadata
412 * file before writing in it (regeneration).
414 unsigned int reset_metadata_flag
:1;
418 * Internal representation of a relayd socket pair.
420 struct consumer_relayd_sock_pair
{
421 /* Network sequence number. */
422 uint64_t net_seq_idx
;
423 /* Number of stream associated with this relayd */
424 unsigned int refcount
;
427 * This flag indicates whether or not we should destroy this object. The
428 * destruction should ONLY occurs when this flag is set and the refcount is
431 unsigned int destroy_flag
;
434 * Mutex protecting the control socket to avoid out of order packets
435 * between threads sending data to the relayd. Since metadata data is sent
436 * over that socket, at least two sendmsg() are needed (header + data)
437 * creating a race for packets to overlap between threads using it.
439 * This is nested INSIDE the consumer_data lock.
440 * This is nested INSIDE the stream lock.
442 pthread_mutex_t ctrl_sock_mutex
;
444 /* Control socket. Command and metadata are passed over it */
445 struct lttcomm_relayd_sock control_sock
;
448 * We don't need a mutex at this point since we only splice or write single
449 * large chunk of data with a header appended at the begining. Moreover,
450 * this socket is for now only used in a single thread.
452 struct lttcomm_relayd_sock data_sock
;
453 struct lttng_ht_node_u64 node
;
455 /* Session id on both sides for the sockets. */
456 uint64_t relayd_session_id
;
457 uint64_t sessiond_session_id
;
461 * UST consumer local data to the program. One or more instance per
464 struct lttng_consumer_local_data
{
466 * Function to call when data is available on a buffer.
467 * Returns the number of bytes read, or negative error value.
469 ssize_t (*on_buffer_ready
)(struct lttng_consumer_stream
*stream
,
470 struct lttng_consumer_local_data
*ctx
);
472 * function to call when we receive a new channel, it receives a
473 * newly allocated channel, depending on the return code of this
474 * function, the new channel will be handled by the application
478 * > 0 (success, FD is kept by application)
479 * == 0 (success, FD is left to library)
482 int (*on_recv_channel
)(struct lttng_consumer_channel
*channel
);
484 * function to call when we receive a new stream, it receives a
485 * newly allocated stream, depending on the return code of this
486 * function, the new stream will be handled by the application
490 * > 0 (success, FD is kept by application)
491 * == 0 (success, FD is left to library)
494 int (*on_recv_stream
)(struct lttng_consumer_stream
*stream
);
496 * function to call when a stream is getting updated by the session
497 * daemon, this function receives the sessiond key and the new
498 * state, depending on the return code of this function the
499 * update of state for the stream is handled by the application
503 * > 0 (success, FD is kept by application)
504 * == 0 (success, FD is left to library)
507 int (*on_update_stream
)(uint64_t sessiond_key
, uint32_t state
);
508 enum lttng_consumer_type type
;
509 /* socket to communicate errors with sessiond */
510 int consumer_error_socket
;
511 /* socket to ask metadata to sessiond. */
512 int consumer_metadata_socket
;
514 * Protect consumer_metadata_socket.
516 * This is nested OUTSIDE the metadata cache lock.
518 pthread_mutex_t metadata_socket_lock
;
519 /* socket to exchange commands with sessiond */
520 char *consumer_command_sock_path
;
521 /* communication with splice */
522 int consumer_channel_pipe
[2];
523 /* Data stream poll thread pipe. To transfer data stream to the thread */
524 struct lttng_pipe
*consumer_data_pipe
;
527 * Data thread use that pipe to catch wakeup from read subbuffer that
528 * detects that there is still data to be read for the stream encountered.
529 * Before doing so, the stream is flagged to indicate that there is still
532 * Both pipes (read/write) are owned and used inside the data thread.
534 struct lttng_pipe
*consumer_wakeup_pipe
;
535 /* Indicate if the wakeup thread has been notified. */
536 unsigned int has_wakeup
:1;
538 /* to let the signal handler wake up the fd receiver thread */
539 int consumer_should_quit
[2];
540 /* Metadata poll thread pipe. Transfer metadata stream to it */
541 struct lttng_pipe
*consumer_metadata_pipe
;
545 * Library-level data. One instance per process.
547 struct lttng_consumer_global_data
{
549 * At this time, this lock is used to ensure coherence between the count
550 * and number of element in the hash table. It's also a protection for
551 * concurrent read/write between threads.
553 * This is nested OUTSIDE the stream lock.
554 * This is nested OUTSIDE the consumer_relayd_sock_pair lock.
556 pthread_mutex_t lock
;
559 * Number of streams in the data stream hash table declared outside.
560 * Protected by consumer_data.lock.
564 /* Channel hash table protected by consumer_data.lock. */
565 struct lttng_ht
*channel_ht
;
567 * Flag specifying if the local array of FDs needs update in the
568 * poll function. Protected by consumer_data.lock.
570 unsigned int need_update
;
571 enum lttng_consumer_type type
;
574 * Relayd socket(s) hashtable indexed by network sequence number. Each
575 * stream has an index which associate the right relayd socket to use.
577 struct lttng_ht
*relayd_ht
;
580 * This hash table contains all streams (metadata and data) indexed by
581 * session id. In other words, the ht is indexed by session id and each
582 * bucket contains the list of associated streams.
584 * This HT uses the "node_session_id" of the consumer stream.
586 struct lttng_ht
*stream_list_ht
;
589 * This HT uses the "node_channel_id" of the consumer stream.
591 struct lttng_ht
*stream_per_chan_id_ht
;
595 * Init consumer data structures.
597 int lttng_consumer_init(void);
600 * Set the error socket for communication with a session daemon.
602 void lttng_consumer_set_error_sock(struct lttng_consumer_local_data
*ctx
,
606 * Set the command socket path for communication with a session daemon.
608 void lttng_consumer_set_command_sock_path(
609 struct lttng_consumer_local_data
*ctx
, char *sock
);
612 * Send return code to session daemon.
614 * Returns the return code of sendmsg : the number of bytes transmitted or -1
617 int lttng_consumer_send_error(struct lttng_consumer_local_data
*ctx
, int cmd
);
620 * Called from signal handler to ensure a clean exit.
622 void lttng_consumer_should_exit(struct lttng_consumer_local_data
*ctx
);
625 * Cleanup the daemon's socket on exit.
627 void lttng_consumer_cleanup(void);
630 * Flush pending writes to trace output disk file.
632 void lttng_consumer_sync_trace_file(struct lttng_consumer_stream
*stream
,
636 * Poll on the should_quit pipe and the command socket return -1 on error and
637 * should exit, 0 if data is available on the command socket
639 int lttng_consumer_poll_socket(struct pollfd
*kconsumer_sockpoll
);
641 struct lttng_consumer_stream
*consumer_allocate_stream(uint64_t channel_key
,
643 enum lttng_consumer_stream_state state
,
644 const char *channel_name
,
651 enum consumer_channel_type type
,
652 unsigned int monitor
);
653 struct lttng_consumer_channel
*consumer_allocate_channel(uint64_t key
,
655 const char *pathname
,
660 enum lttng_event_output output
,
661 uint64_t tracefile_size
,
662 uint64_t tracefile_count
,
663 uint64_t session_id_per_pid
,
664 unsigned int monitor
,
665 unsigned int live_timer_interval
,
666 const char *root_shm_path
,
667 const char *shm_path
);
668 void consumer_del_stream(struct lttng_consumer_stream
*stream
,
669 struct lttng_ht
*ht
);
670 void consumer_del_metadata_stream(struct lttng_consumer_stream
*stream
,
671 struct lttng_ht
*ht
);
672 int consumer_add_channel(struct lttng_consumer_channel
*channel
,
673 struct lttng_consumer_local_data
*ctx
);
674 void consumer_del_channel(struct lttng_consumer_channel
*channel
);
676 /* lttng-relayd consumer command */
677 struct consumer_relayd_sock_pair
*consumer_find_relayd(uint64_t key
);
678 int consumer_send_relayd_stream(struct lttng_consumer_stream
*stream
, char *path
);
679 int consumer_send_relayd_streams_sent(uint64_t net_seq_idx
);
680 void close_relayd_stream(struct lttng_consumer_stream
*stream
);
681 struct lttng_consumer_channel
*consumer_find_channel(uint64_t key
);
682 int consumer_handle_stream_before_relayd(struct lttng_consumer_stream
*stream
,
684 void consumer_steal_stream_key(int key
, struct lttng_ht
*ht
);
686 struct lttng_consumer_local_data
*lttng_consumer_create(
687 enum lttng_consumer_type type
,
688 ssize_t (*buffer_ready
)(struct lttng_consumer_stream
*stream
,
689 struct lttng_consumer_local_data
*ctx
),
690 int (*recv_channel
)(struct lttng_consumer_channel
*channel
),
691 int (*recv_stream
)(struct lttng_consumer_stream
*stream
),
692 int (*update_stream
)(uint64_t sessiond_key
, uint32_t state
));
693 void lttng_consumer_destroy(struct lttng_consumer_local_data
*ctx
);
694 ssize_t
lttng_consumer_on_read_subbuffer_mmap(
695 struct lttng_consumer_local_data
*ctx
,
696 struct lttng_consumer_stream
*stream
, unsigned long len
,
697 unsigned long padding
,
698 struct ctf_packet_index
*index
);
699 ssize_t
lttng_consumer_on_read_subbuffer_splice(
700 struct lttng_consumer_local_data
*ctx
,
701 struct lttng_consumer_stream
*stream
, unsigned long len
,
702 unsigned long padding
,
703 struct ctf_packet_index
*index
);
704 int lttng_consumer_take_snapshot(struct lttng_consumer_stream
*stream
);
705 int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream
*stream
,
707 int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream
*stream
);
708 int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream
*stream
);
709 void *consumer_thread_metadata_poll(void *data
);
710 void *consumer_thread_data_poll(void *data
);
711 void *consumer_thread_sessiond_poll(void *data
);
712 void *consumer_thread_channel_poll(void *data
);
713 int lttng_consumer_recv_cmd(struct lttng_consumer_local_data
*ctx
,
714 int sock
, struct pollfd
*consumer_sockpoll
);
716 ssize_t
lttng_consumer_read_subbuffer(struct lttng_consumer_stream
*stream
,
717 struct lttng_consumer_local_data
*ctx
);
718 int lttng_consumer_on_recv_stream(struct lttng_consumer_stream
*stream
);
719 int consumer_add_relayd_socket(uint64_t net_seq_idx
, int sock_type
,
720 struct lttng_consumer_local_data
*ctx
, int sock
,
721 struct pollfd
*consumer_sockpoll
, struct lttcomm_relayd_sock
*relayd_sock
,
722 uint64_t sessiond_id
, uint64_t relayd_session_id
);
723 void consumer_flag_relayd_for_destroy(
724 struct consumer_relayd_sock_pair
*relayd
);
725 int consumer_data_pending(uint64_t id
);
726 int consumer_send_status_msg(int sock
, int ret_code
);
727 int consumer_send_status_channel(int sock
,
728 struct lttng_consumer_channel
*channel
);
729 void notify_thread_del_channel(struct lttng_consumer_local_data
*ctx
,
731 void consumer_destroy_relayd(struct consumer_relayd_sock_pair
*relayd
);
732 unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos
,
733 unsigned long produced_pos
, uint64_t nb_packets_per_stream
,
734 uint64_t max_sb_size
);
735 int consumer_add_data_stream(struct lttng_consumer_stream
*stream
);
736 void consumer_del_stream_for_data(struct lttng_consumer_stream
*stream
);
737 int consumer_add_metadata_stream(struct lttng_consumer_stream
*stream
);
738 void consumer_del_stream_for_metadata(struct lttng_consumer_stream
*stream
);
739 int consumer_create_index_file(struct lttng_consumer_stream
*stream
);
741 #endif /* LIB_CONSUMER_H */