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
,
65 LTTNG_CONSUMER_SET_CHANNEL_ROTATE_PIPE
,
66 LTTNG_CONSUMER_ROTATE_RENAME
,
70 /* State of each fd in consumer */
71 enum lttng_consumer_stream_state
{
72 LTTNG_CONSUMER_ACTIVE_STREAM
,
73 LTTNG_CONSUMER_PAUSE_STREAM
,
74 LTTNG_CONSUMER_DELETE_STREAM
,
77 enum lttng_consumer_type
{
78 LTTNG_CONSUMER_UNKNOWN
= 0,
79 LTTNG_CONSUMER_KERNEL
,
84 enum consumer_endpoint_status
{
85 CONSUMER_ENDPOINT_ACTIVE
,
86 CONSUMER_ENDPOINT_INACTIVE
,
89 enum consumer_channel_output
{
90 CONSUMER_CHANNEL_MMAP
= 0,
91 CONSUMER_CHANNEL_SPLICE
= 1,
94 enum consumer_channel_type
{
95 CONSUMER_CHANNEL_TYPE_METADATA
= 0,
96 CONSUMER_CHANNEL_TYPE_DATA
= 1,
99 extern struct lttng_consumer_global_data consumer_data
;
102 struct cds_list_head head
;
107 struct consumer_metadata_cache
;
109 struct lttng_consumer_channel
{
110 /* HT node used for consumer_data.channel_ht */
111 struct lttng_ht_node_u64 node
;
112 /* Indexed key. Incremented value in the consumer. */
114 /* Number of streams referencing this channel */
116 /* Tracing session id on the session daemon side. */
119 * Session id when requesting metadata to the session daemon for
120 * a session with per-PID buffers.
122 uint64_t session_id_per_pid
;
123 /* Channel trace file path name. */
124 char pathname
[PATH_MAX
];
126 char name
[LTTNG_SYMBOL_NAME_LEN
];
127 /* UID and GID of the session owning this channel. */
130 /* Relayd id of the channel. -1ULL if it does not apply. */
133 * Number of streams NOT initialized yet. This is used in order to not
134 * delete this channel if streams are getting initialized.
136 unsigned int nb_init_stream_left
;
137 /* Output type (mmap or splice). */
138 enum consumer_channel_output output
;
139 /* Channel type for stream */
140 enum consumer_channel_type type
;
143 uid_t ust_app_uid
; /* Application UID. */
144 struct ustctl_consumer_channel
*uchan
;
145 unsigned char uuid
[UUID_STR_LEN
];
147 * Temporary stream list used to store the streams once created and waiting
148 * to be sent to the session daemon by receiving the
149 * LTTNG_CONSUMER_GET_CHANNEL.
151 struct stream_list streams
;
154 * Set if the channel is metadata. We keep a reference to the stream
155 * because we have to flush data once pushed by the session daemon. For a
156 * regular channel, this is always set to NULL.
158 struct lttng_consumer_stream
*metadata_stream
;
162 /* Node within channel thread ht */
163 struct lttng_ht_node_u64 wait_fd_node
;
165 /* Metadata cache is metadata channel */
166 struct consumer_metadata_cache
*metadata_cache
;
168 /* For UST metadata periodical flush */
169 int switch_timer_enabled
;
170 timer_t switch_timer
;
171 int switch_timer_error
;
173 /* For the live mode */
174 int live_timer_enabled
;
176 int live_timer_error
;
178 /* For channel monitoring timer. */
179 int monitor_timer_enabled
;
180 timer_t monitor_timer
;
182 /* On-disk circular buffer */
183 uint64_t tracefile_size
;
184 uint64_t tracefile_count
;
186 * Monitor or not the streams of this channel meaning this indicates if the
187 * streams should be sent to the data/metadata thread or added to the no
188 * monitor list of the channel.
190 unsigned int monitor
;
195 * This lock protects against concurrent update of channel.
197 * This is nested INSIDE the consumer data lock.
198 * This is nested OUTSIDE the channel timer lock.
199 * This is nested OUTSIDE the metadata cache lock.
200 * This is nested OUTSIDE stream lock.
201 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
203 pthread_mutex_t lock
;
206 * Channel teardown lock.
208 * This lock protect against teardown of channel. It is _never_
209 * taken by the timer handler.
211 * This is nested INSIDE the consumer data lock.
212 * This is nested INSIDE the channel lock.
213 * This is nested OUTSIDE the metadata cache lock.
214 * This is nested OUTSIDE stream lock.
215 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
217 pthread_mutex_t timer_lock
;
219 /* Timer value in usec for live streaming. */
220 unsigned int live_timer_interval
;
224 char root_shm_path
[PATH_MAX
];
225 char shm_path
[PATH_MAX
];
226 /* Total number of discarded events for that channel. */
227 uint64_t discarded_events
;
228 /* Total number of missed packets due to overwriting (overwrite). */
229 uint64_t lost_packets
;
231 bool streams_sent_to_relayd
;
234 * Account how many streams are waiting for their rotation to be
235 * complete. When this number reaches 0, we inform the session
236 * daemon that this channel has finished its rotation.
238 uint64_t nr_stream_rotate_pending
;
241 * The chunk id where we currently write the data. This value is sent
242 * to the relay when we add a stream and when a stream rotates. This
243 * allows to keep track of where each stream on the relay is writing.
245 uint64_t current_chunk_id
;
249 * Internal representation of the streams, sessiond_key is used to identify
252 struct lttng_consumer_stream
{
253 /* HT node used by the data_ht and metadata_ht */
254 struct lttng_ht_node_u64 node
;
255 /* stream indexed per channel key node */
256 struct lttng_ht_node_u64 node_channel_id
;
257 /* HT node used in consumer_data.stream_list_ht */
258 struct lttng_ht_node_u64 node_session_id
;
259 /* Pointer to associated channel. */
260 struct lttng_consumer_channel
*chan
;
262 /* Key by which the stream is indexed for 'node'. */
265 * File descriptor of the data output file. This can be either a file or a
266 * socket fd for relayd streaming.
268 int out_fd
; /* output file to write the data */
269 /* Write position in the output file descriptor */
271 /* Amount of bytes written to the output */
272 uint64_t output_written
;
273 enum lttng_consumer_stream_state state
;
276 int hangup_flush_done
;
279 * Whether the stream is in a "complete" state (e.g. it does not have a
280 * partially written sub-buffer.
282 * Initialized to "false" on stream creation (first packet is empty).
284 * The various transitions of the quiescent state are:
285 * - On "start" tracing: set to false, since the stream is not
287 * - On "stop" tracing: if !quiescent -> flush FINAL (update
288 * timestamp_end), and set to true; the stream has entered a
289 * complete/quiescent state.
290 * - On "destroy" or stream/application hang-up: if !quiescent ->
291 * flush FINAL, and set to true.
293 * NOTE: Update and read are protected by the stream lock.
298 * metadata_timer_lock protects flags waiting_on_metadata and
299 * missed_metadata_flush.
301 pthread_mutex_t metadata_timer_lock
;
303 * Flag set when awaiting metadata to be pushed. Used in the
304 * timer thread to skip waiting on the stream (and stream lock) to
305 * ensure we can proceed to flushing metadata in live mode.
307 bool waiting_on_metadata
;
308 /* Raised when a timer misses a metadata flush. */
309 bool missed_metadata_flush
;
311 enum lttng_event_output output
;
312 /* Maximum subbuffer size. */
313 unsigned long max_sb_size
;
316 * Still used by the kernel for MMAP output. For UST, the ustctl getter is
317 * used for the mmap base and offset.
320 unsigned long mmap_len
;
325 /* UID/GID of the user owning the session to which stream belongs */
328 /* Network sequence number. Indicating on which relayd socket it goes. */
329 uint64_t net_seq_idx
;
331 * Indicate if this stream was successfully sent to a relayd. This is set
332 * after the refcount of the relayd is incremented and is checked when the
333 * stream is closed before decrementing the refcount in order to avoid an
336 unsigned int sent_to_relayd
;
338 /* Identify if the stream is the metadata */
339 unsigned int metadata_flag
;
341 * Last known metadata version, reset the metadata file in case
344 uint64_t metadata_version
;
345 /* Used when the stream is set for network streaming */
346 uint64_t relayd_stream_id
;
348 * When sending a stream packet to a relayd, this number is used to track
349 * the packet sent by the consumer and seen by the relayd. When sending the
350 * data header to the relayd, this number is sent and if the transmission
351 * was successful, it is incremented.
353 * Even if the full data is not fully transmitted it won't matter since
354 * only two possible error can happen after that where either the relayd
355 * died or a read error is detected on the stream making this value useless
358 * This value SHOULD be read/updated atomically or with the lock acquired.
360 uint64_t next_net_seq_num
;
362 * Lock to use the stream FDs since they are used between threads.
364 * This is nested INSIDE the consumer_data lock.
365 * This is nested INSIDE the channel lock.
366 * This is nested INSIDE the channel timer lock.
367 * This is nested OUTSIDE the metadata cache lock.
368 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
370 pthread_mutex_t lock
;
371 /* Tracing session id */
374 * Indicates if the stream end point is still active or not (network
375 * streaming or local file system). The thread "owning" the stream is
376 * handling this status and can be notified of a state change through the
377 * consumer data appropriate pipe.
379 enum consumer_endpoint_status endpoint_status
;
380 /* Stream name. Format is: <channel_name>_<cpu_number> */
381 char name
[LTTNG_SYMBOL_NAME_LEN
];
382 /* Internal state of libustctl. */
383 struct ustctl_consumer_stream
*ustream
;
384 struct cds_list_head send_node
;
385 /* On-disk circular buffer */
386 uint64_t tracefile_size_current
;
387 uint64_t tracefile_count_current
;
389 * Monitor or not the streams of this channel meaning this indicates if the
390 * streams should be sent to the data/metadata thread or added to the no
391 * monitor list of the channel.
393 unsigned int monitor
;
395 * Indicate if the stream is globally visible meaning that it has been
396 * added to the multiple hash tables. If *not* set, NO lock should be
397 * acquired in the destroy path.
399 unsigned int globally_visible
;
401 * Pipe to wake up the metadata poll thread when the UST metadata
404 int ust_metadata_poll_pipe
[2];
406 * How much metadata was read from the metadata cache and sent
409 uint64_t ust_metadata_pushed
;
411 * Copy of the last discarded event value to detect the overflow of
414 uint64_t last_discarded_events
;
415 /* Copy of the sequence number of the last packet extracted. */
416 uint64_t last_sequence_number
;
418 * Index file object of the index file for this stream.
420 struct lttng_index_file
*index_file
;
423 * Local pipe to extract data when using splice.
428 * Rendez-vous point between data and metadata stream in live mode.
430 pthread_cond_t metadata_rdv
;
431 pthread_mutex_t metadata_rdv_lock
;
434 * rotate_position represents the position in the ring-buffer that has to
435 * be flushed to disk to complete the ongoing rotation. When that position
436 * is reached, this tracefile can be closed and a new one is created in
437 * channel_read_only_attributes.path.
439 unsigned long rotate_position
;
442 * Read-only copies of channel values. We cannot safely access the
443 * channel from a stream, so we need to have a local copy of these
444 * fields in the stream object. These fields should be removed from
445 * the stream objects when we introduce refcounting.
448 char path
[LTTNG_PATH_MAX
];
449 uint64_t tracefile_size
;
450 } channel_read_only_attributes
;
453 * Flag to inform the data or metadata thread that a stream is
454 * ready to be rotated.
458 /* Indicate if the stream still has some data to be read. */
459 unsigned int has_data
:1;
461 * Inform the consumer or relay to reset the metadata
462 * file before writing in it (regeneration).
464 unsigned int reset_metadata_flag
:1;
468 * Internal representation of a relayd socket pair.
470 struct consumer_relayd_sock_pair
{
471 /* Network sequence number. */
472 uint64_t net_seq_idx
;
473 /* Number of stream associated with this relayd */
474 unsigned int refcount
;
477 * This flag indicates whether or not we should destroy this object. The
478 * destruction should ONLY occurs when this flag is set and the refcount is
481 unsigned int destroy_flag
;
484 * Mutex protecting the control socket to avoid out of order packets
485 * between threads sending data to the relayd. Since metadata data is sent
486 * over that socket, at least two sendmsg() are needed (header + data)
487 * creating a race for packets to overlap between threads using it.
489 * This is nested INSIDE the consumer_data lock.
490 * This is nested INSIDE the stream lock.
492 pthread_mutex_t ctrl_sock_mutex
;
494 /* Control socket. Command and metadata are passed over it */
495 struct lttcomm_relayd_sock control_sock
;
498 * We don't need a mutex at this point since we only splice or write single
499 * large chunk of data with a header appended at the begining. Moreover,
500 * this socket is for now only used in a single thread.
502 struct lttcomm_relayd_sock data_sock
;
503 struct lttng_ht_node_u64 node
;
505 /* Session id on both sides for the sockets. */
506 uint64_t relayd_session_id
;
507 uint64_t sessiond_session_id
;
511 * UST consumer local data to the program. One or more instance per
514 struct lttng_consumer_local_data
{
516 * Function to call when data is available on a buffer.
517 * Returns the number of bytes read, or negative error value.
519 ssize_t (*on_buffer_ready
)(struct lttng_consumer_stream
*stream
,
520 struct lttng_consumer_local_data
*ctx
);
522 * function to call when we receive a new channel, it receives a
523 * newly allocated channel, depending on the return code of this
524 * function, the new channel will be handled by the application
528 * > 0 (success, FD is kept by application)
529 * == 0 (success, FD is left to library)
532 int (*on_recv_channel
)(struct lttng_consumer_channel
*channel
);
534 * function to call when we receive a new stream, it receives a
535 * newly allocated stream, depending on the return code of this
536 * function, the new stream will be handled by the application
540 * > 0 (success, FD is kept by application)
541 * == 0 (success, FD is left to library)
544 int (*on_recv_stream
)(struct lttng_consumer_stream
*stream
);
546 * function to call when a stream is getting updated by the session
547 * daemon, this function receives the sessiond key and the new
548 * state, depending on the return code of this function the
549 * update of state for the stream is handled by the application
553 * > 0 (success, FD is kept by application)
554 * == 0 (success, FD is left to library)
557 int (*on_update_stream
)(uint64_t sessiond_key
, uint32_t state
);
558 enum lttng_consumer_type type
;
559 /* socket to communicate errors with sessiond */
560 int consumer_error_socket
;
561 /* socket to ask metadata to sessiond. */
562 int consumer_metadata_socket
;
564 * Protect consumer_metadata_socket.
566 * This is nested OUTSIDE the metadata cache lock.
568 pthread_mutex_t metadata_socket_lock
;
569 /* socket to exchange commands with sessiond */
570 char *consumer_command_sock_path
;
571 /* communication with splice */
572 int consumer_channel_pipe
[2];
573 /* Data stream poll thread pipe. To transfer data stream to the thread */
574 struct lttng_pipe
*consumer_data_pipe
;
577 * Data thread use that pipe to catch wakeup from read subbuffer that
578 * detects that there is still data to be read for the stream encountered.
579 * Before doing so, the stream is flagged to indicate that there is still
582 * Both pipes (read/write) are owned and used inside the data thread.
584 struct lttng_pipe
*consumer_wakeup_pipe
;
585 /* Indicate if the wakeup thread has been notified. */
586 unsigned int has_wakeup
:1;
588 /* to let the signal handler wake up the fd receiver thread */
589 int consumer_should_quit
[2];
590 /* Metadata poll thread pipe. Transfer metadata stream to it */
591 struct lttng_pipe
*consumer_metadata_pipe
;
593 * Pipe used by the channel monitoring timers to provide state samples
594 * to the session daemon (write-only).
596 int channel_monitor_pipe
;
598 * Pipe used to inform the session daemon that a stream has finished
599 * its rotation (write-only).
601 int channel_rotate_pipe
;
605 * Library-level data. One instance per process.
607 struct lttng_consumer_global_data
{
609 * At this time, this lock is used to ensure coherence between the count
610 * and number of element in the hash table. It's also a protection for
611 * concurrent read/write between threads.
613 * This is nested OUTSIDE the stream lock.
614 * This is nested OUTSIDE the consumer_relayd_sock_pair lock.
616 pthread_mutex_t lock
;
619 * Number of streams in the data stream hash table declared outside.
620 * Protected by consumer_data.lock.
624 /* Channel hash table protected by consumer_data.lock. */
625 struct lttng_ht
*channel_ht
;
627 * Flag specifying if the local array of FDs needs update in the
628 * poll function. Protected by consumer_data.lock.
630 unsigned int need_update
;
631 enum lttng_consumer_type type
;
634 * Relayd socket(s) hashtable indexed by network sequence number. Each
635 * stream has an index which associate the right relayd socket to use.
637 struct lttng_ht
*relayd_ht
;
640 * This hash table contains all streams (metadata and data) indexed by
641 * session id. In other words, the ht is indexed by session id and each
642 * bucket contains the list of associated streams.
644 * This HT uses the "node_session_id" of the consumer stream.
646 struct lttng_ht
*stream_list_ht
;
649 * This HT uses the "node_channel_id" of the consumer stream.
651 struct lttng_ht
*stream_per_chan_id_ht
;
655 * Set to nonzero when the consumer is exiting. Updated by signal
656 * handler and thread exit, read by threads.
658 extern int consumer_quit
;
661 * Set to nonzero when the consumer is exiting. Updated by signal
662 * handler and thread exit, read by threads.
664 extern int consumer_quit
;
666 /* Flag used to temporarily pause data consumption from testpoints. */
667 extern int data_consumption_paused
;
670 * Init consumer data structures.
672 int lttng_consumer_init(void);
675 * Set the error socket for communication with a session daemon.
677 void lttng_consumer_set_error_sock(struct lttng_consumer_local_data
*ctx
,
681 * Set the command socket path for communication with a session daemon.
683 void lttng_consumer_set_command_sock_path(
684 struct lttng_consumer_local_data
*ctx
, char *sock
);
687 * Send return code to session daemon.
689 * Returns the return code of sendmsg : the number of bytes transmitted or -1
692 int lttng_consumer_send_error(struct lttng_consumer_local_data
*ctx
, int cmd
);
695 * Called from signal handler to ensure a clean exit.
697 void lttng_consumer_should_exit(struct lttng_consumer_local_data
*ctx
);
700 * Cleanup the daemon's socket on exit.
702 void lttng_consumer_cleanup(void);
705 * Poll on the should_quit pipe and the command socket return -1 on error and
706 * should exit, 0 if data is available on the command socket
708 int lttng_consumer_poll_socket(struct pollfd
*kconsumer_sockpoll
);
711 * Copy the fields from the channel that need to be accessed (read-only)
712 * directly from the stream.
714 void consumer_stream_update_channel_attributes(
715 struct lttng_consumer_stream
*stream
,
716 struct lttng_consumer_channel
*channel
);
718 struct lttng_consumer_stream
*consumer_allocate_stream(uint64_t channel_key
,
720 enum lttng_consumer_stream_state state
,
721 const char *channel_name
,
728 enum consumer_channel_type type
,
729 unsigned int monitor
);
730 struct lttng_consumer_channel
*consumer_allocate_channel(uint64_t key
,
732 const char *pathname
,
737 enum lttng_event_output output
,
738 uint64_t tracefile_size
,
739 uint64_t tracefile_count
,
740 uint64_t session_id_per_pid
,
741 unsigned int monitor
,
742 unsigned int live_timer_interval
,
743 const char *root_shm_path
,
744 const char *shm_path
);
745 void consumer_del_stream(struct lttng_consumer_stream
*stream
,
746 struct lttng_ht
*ht
);
747 void consumer_del_metadata_stream(struct lttng_consumer_stream
*stream
,
748 struct lttng_ht
*ht
);
749 int consumer_add_channel(struct lttng_consumer_channel
*channel
,
750 struct lttng_consumer_local_data
*ctx
);
751 void consumer_del_channel(struct lttng_consumer_channel
*channel
);
753 /* lttng-relayd consumer command */
754 struct consumer_relayd_sock_pair
*consumer_find_relayd(uint64_t key
);
755 int consumer_send_relayd_stream(struct lttng_consumer_stream
*stream
, char *path
);
756 int consumer_send_relayd_streams_sent(uint64_t net_seq_idx
);
757 void close_relayd_stream(struct lttng_consumer_stream
*stream
);
758 struct lttng_consumer_channel
*consumer_find_channel(uint64_t key
);
759 int consumer_handle_stream_before_relayd(struct lttng_consumer_stream
*stream
,
761 void consumer_steal_stream_key(int key
, struct lttng_ht
*ht
);
763 struct lttng_consumer_local_data
*lttng_consumer_create(
764 enum lttng_consumer_type type
,
765 ssize_t (*buffer_ready
)(struct lttng_consumer_stream
*stream
,
766 struct lttng_consumer_local_data
*ctx
),
767 int (*recv_channel
)(struct lttng_consumer_channel
*channel
),
768 int (*recv_stream
)(struct lttng_consumer_stream
*stream
),
769 int (*update_stream
)(uint64_t sessiond_key
, uint32_t state
));
770 void lttng_consumer_destroy(struct lttng_consumer_local_data
*ctx
);
771 ssize_t
lttng_consumer_on_read_subbuffer_mmap(
772 struct lttng_consumer_local_data
*ctx
,
773 struct lttng_consumer_stream
*stream
, unsigned long len
,
774 unsigned long padding
,
775 struct ctf_packet_index
*index
);
776 ssize_t
lttng_consumer_on_read_subbuffer_splice(
777 struct lttng_consumer_local_data
*ctx
,
778 struct lttng_consumer_stream
*stream
, unsigned long len
,
779 unsigned long padding
,
780 struct ctf_packet_index
*index
);
781 int lttng_consumer_sample_snapshot_positions(struct lttng_consumer_stream
*stream
);
782 int lttng_consumer_take_snapshot(struct lttng_consumer_stream
*stream
);
783 int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream
*stream
,
785 int lttng_consumer_get_consumed_snapshot(struct lttng_consumer_stream
*stream
,
787 int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream
*stream
);
788 int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream
*stream
);
789 void *consumer_thread_metadata_poll(void *data
);
790 void *consumer_thread_data_poll(void *data
);
791 void *consumer_thread_sessiond_poll(void *data
);
792 void *consumer_thread_channel_poll(void *data
);
793 int lttng_consumer_recv_cmd(struct lttng_consumer_local_data
*ctx
,
794 int sock
, struct pollfd
*consumer_sockpoll
);
796 ssize_t
lttng_consumer_read_subbuffer(struct lttng_consumer_stream
*stream
,
797 struct lttng_consumer_local_data
*ctx
);
798 int lttng_consumer_on_recv_stream(struct lttng_consumer_stream
*stream
);
799 void consumer_add_relayd_socket(uint64_t net_seq_idx
, int sock_type
,
800 struct lttng_consumer_local_data
*ctx
, int sock
,
801 struct pollfd
*consumer_sockpoll
, struct lttcomm_relayd_sock
*relayd_sock
,
802 uint64_t sessiond_id
, uint64_t relayd_session_id
);
803 void consumer_flag_relayd_for_destroy(
804 struct consumer_relayd_sock_pair
*relayd
);
805 int consumer_data_pending(uint64_t id
);
806 int consumer_send_status_msg(int sock
, int ret_code
);
807 int consumer_send_status_channel(int sock
,
808 struct lttng_consumer_channel
*channel
);
809 void notify_thread_del_channel(struct lttng_consumer_local_data
*ctx
,
811 void consumer_destroy_relayd(struct consumer_relayd_sock_pair
*relayd
);
812 unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos
,
813 unsigned long produced_pos
, uint64_t nb_packets_per_stream
,
814 uint64_t max_sb_size
);
815 void consumer_add_data_stream(struct lttng_consumer_stream
*stream
);
816 void consumer_del_stream_for_data(struct lttng_consumer_stream
*stream
);
817 void consumer_add_metadata_stream(struct lttng_consumer_stream
*stream
);
818 void consumer_del_stream_for_metadata(struct lttng_consumer_stream
*stream
);
819 int consumer_create_index_file(struct lttng_consumer_stream
*stream
);
820 int lttng_consumer_stream_is_rotate_ready(struct lttng_consumer_stream
*stream
);
821 int lttng_consumer_rotate_stream(struct lttng_consumer_local_data
*ctx
,
822 struct lttng_consumer_stream
*stream
, bool *rotated
);
823 int lttng_consumer_rotate_rename(const char *current_path
, const char *new_path
,
824 uid_t uid
, gid_t gid
, uint64_t relayd_id
);
825 void lttng_consumer_reset_stream_rotate_state(struct lttng_consumer_stream
*stream
);
826 int lttng_consumer_mkdir(const char *path
, uid_t uid
, gid_t gid
,
829 #endif /* LIB_CONSUMER_H */