2 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
3 * Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
4 * 2012 - David Goulet <dgoulet@efficios.com>
5 * 2018 - Jérémie Galarneau <jeremie.galarneau@efficios.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License, version 2 only,
9 * as published by the Free Software Foundation.
11 * This program is distributed in the hope that it will be useful, but WITHOUT
12 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
13 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
16 * You should have received a copy of the GNU General Public License along
17 * with this program; if not, write to the Free Software Foundation, Inc.,
18 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
21 #ifndef LIB_CONSUMER_H
22 #define LIB_CONSUMER_H
27 #include <urcu/list.h>
29 #include <lttng/lttng.h>
31 #include <common/hashtable/hashtable.h>
32 #include <common/compat/fcntl.h>
33 #include <common/compat/uuid.h>
34 #include <common/sessiond-comm/sessiond-comm.h>
35 #include <common/pipe.h>
36 #include <common/index/ctf-index.h>
38 /* Commands for consumer */
39 enum lttng_consumer_command
{
40 LTTNG_CONSUMER_ADD_CHANNEL
,
41 LTTNG_CONSUMER_ADD_STREAM
,
42 /* pause, delete, active depending on fd state */
43 LTTNG_CONSUMER_UPDATE_STREAM
,
44 /* inform the consumer to quit when all fd has hang up */
45 LTTNG_CONSUMER_STOP
, /* deprecated */
46 LTTNG_CONSUMER_ADD_RELAYD_SOCKET
,
47 /* Inform the consumer to kill a specific relayd connection */
48 LTTNG_CONSUMER_DESTROY_RELAYD
,
49 /* Return to the sessiond if there is data pending for a session */
50 LTTNG_CONSUMER_DATA_PENDING
,
51 /* Consumer creates a channel and returns it to sessiond. */
52 LTTNG_CONSUMER_ASK_CHANNEL_CREATION
,
53 LTTNG_CONSUMER_GET_CHANNEL
,
54 LTTNG_CONSUMER_DESTROY_CHANNEL
,
55 LTTNG_CONSUMER_PUSH_METADATA
,
56 LTTNG_CONSUMER_CLOSE_METADATA
,
57 LTTNG_CONSUMER_SETUP_METADATA
,
58 LTTNG_CONSUMER_FLUSH_CHANNEL
,
59 LTTNG_CONSUMER_SNAPSHOT_CHANNEL
,
60 LTTNG_CONSUMER_SNAPSHOT_METADATA
,
61 LTTNG_CONSUMER_STREAMS_SENT
,
62 LTTNG_CONSUMER_DISCARDED_EVENTS
,
63 LTTNG_CONSUMER_LOST_PACKETS
,
64 LTTNG_CONSUMER_CLEAR_QUIESCENT_CHANNEL
,
65 LTTNG_CONSUMER_SET_CHANNEL_MONITOR_PIPE
,
66 LTTNG_CONSUMER_ROTATE_CHANNEL
,
67 LTTNG_CONSUMER_ROTATE_RENAME
,
68 LTTNG_CONSUMER_CHECK_ROTATION_PENDING_LOCAL
,
69 LTTNG_CONSUMER_CHECK_ROTATION_PENDING_RELAY
,
73 /* State of each fd in consumer */
74 enum lttng_consumer_stream_state
{
75 LTTNG_CONSUMER_ACTIVE_STREAM
,
76 LTTNG_CONSUMER_PAUSE_STREAM
,
77 LTTNG_CONSUMER_DELETE_STREAM
,
80 enum lttng_consumer_type
{
81 LTTNG_CONSUMER_UNKNOWN
= 0,
82 LTTNG_CONSUMER_KERNEL
,
87 enum consumer_endpoint_status
{
88 CONSUMER_ENDPOINT_ACTIVE
,
89 CONSUMER_ENDPOINT_INACTIVE
,
92 enum consumer_channel_output
{
93 CONSUMER_CHANNEL_MMAP
= 0,
94 CONSUMER_CHANNEL_SPLICE
= 1,
97 enum consumer_channel_type
{
98 CONSUMER_CHANNEL_TYPE_METADATA
= 0,
99 CONSUMER_CHANNEL_TYPE_DATA
= 1,
102 extern struct lttng_consumer_global_data consumer_data
;
105 struct cds_list_head head
;
110 struct consumer_metadata_cache
;
112 struct lttng_consumer_channel
{
113 /* HT node used for consumer_data.channel_ht */
114 struct lttng_ht_node_u64 node
;
115 /* Indexed key. Incremented value in the consumer. */
117 /* Number of streams referencing this channel */
119 /* Tracing session id on the session daemon side. */
122 * Session id when requesting metadata to the session daemon for
123 * a session with per-PID buffers.
125 uint64_t session_id_per_pid
;
126 /* Channel trace file path name. */
127 char pathname
[PATH_MAX
];
129 char name
[LTTNG_SYMBOL_NAME_LEN
];
130 /* UID and GID of the session owning this channel. */
133 /* Relayd id of the channel. -1ULL if it does not apply. */
136 * Number of streams NOT initialized yet. This is used in order to not
137 * delete this channel if streams are getting initialized.
139 unsigned int nb_init_stream_left
;
140 /* Output type (mmap or splice). */
141 enum consumer_channel_output output
;
142 /* Channel type for stream */
143 enum consumer_channel_type type
;
146 uid_t ust_app_uid
; /* Application UID. */
147 struct ustctl_consumer_channel
*uchan
;
148 unsigned char uuid
[UUID_STR_LEN
];
150 * Temporary stream list used to store the streams once created and waiting
151 * to be sent to the session daemon by receiving the
152 * LTTNG_CONSUMER_GET_CHANNEL.
154 struct stream_list streams
;
157 * Set if the channel is metadata. We keep a reference to the stream
158 * because we have to flush data once pushed by the session daemon. For a
159 * regular channel, this is always set to NULL.
161 struct lttng_consumer_stream
*metadata_stream
;
165 /* Node within channel thread ht */
166 struct lttng_ht_node_u64 wait_fd_node
;
168 /* Metadata cache is metadata channel */
169 struct consumer_metadata_cache
*metadata_cache
;
171 /* For UST metadata periodical flush */
172 int switch_timer_enabled
;
173 timer_t switch_timer
;
174 int switch_timer_error
;
176 /* For the live mode */
177 int live_timer_enabled
;
179 int live_timer_error
;
181 /* For channel monitoring timer. */
182 int monitor_timer_enabled
;
183 timer_t monitor_timer
;
185 /* On-disk circular buffer */
186 uint64_t tracefile_size
;
187 uint64_t tracefile_count
;
189 * Monitor or not the streams of this channel meaning this indicates if the
190 * streams should be sent to the data/metadata thread or added to the no
191 * monitor list of the channel.
193 unsigned int monitor
;
198 * This lock protects against concurrent update of channel.
200 * This is nested INSIDE the consumer data lock.
201 * This is nested OUTSIDE the channel timer lock.
202 * This is nested OUTSIDE the metadata cache lock.
203 * This is nested OUTSIDE stream lock.
204 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
206 pthread_mutex_t lock
;
209 * Channel teardown lock.
211 * This lock protect against teardown of channel. It is _never_
212 * taken by the timer handler.
214 * This is nested INSIDE the consumer data lock.
215 * This is nested INSIDE the channel lock.
216 * This is nested OUTSIDE the metadata cache lock.
217 * This is nested OUTSIDE stream lock.
218 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
220 pthread_mutex_t timer_lock
;
222 /* Timer value in usec for live streaming. */
223 unsigned int live_timer_interval
;
227 char root_shm_path
[PATH_MAX
];
228 char shm_path
[PATH_MAX
];
229 /* Total number of discarded events for that channel. */
230 uint64_t discarded_events
;
231 /* Total number of missed packets due to overwriting (overwrite). */
232 uint64_t lost_packets
;
234 bool streams_sent_to_relayd
;
237 * The chunk id where we currently write the data. This value is sent
238 * to the relay when we add a stream and when a stream rotates. This
239 * allows to keep track of where each stream on the relay is writing.
241 uint64_t current_chunk_id
;
245 * Internal representation of the streams, sessiond_key is used to identify
248 struct lttng_consumer_stream
{
249 /* HT node used by the data_ht and metadata_ht */
250 struct lttng_ht_node_u64 node
;
251 /* stream indexed per channel key node */
252 struct lttng_ht_node_u64 node_channel_id
;
253 /* HT node used in consumer_data.stream_list_ht */
254 struct lttng_ht_node_u64 node_session_id
;
255 /* Pointer to associated channel. */
256 struct lttng_consumer_channel
*chan
;
258 /* Key by which the stream is indexed for 'node'. */
261 * File descriptor of the data output file. This can be either a file or a
262 * socket fd for relayd streaming.
264 int out_fd
; /* output file to write the data */
265 /* Write position in the output file descriptor */
267 /* Amount of bytes written to the output */
268 uint64_t output_written
;
269 enum lttng_consumer_stream_state state
;
272 int hangup_flush_done
;
275 * Whether the stream is in a "complete" state (e.g. it does not have a
276 * partially written sub-buffer.
278 * Initialized to "false" on stream creation (first packet is empty).
280 * The various transitions of the quiescent state are:
281 * - On "start" tracing: set to false, since the stream is not
283 * - On "stop" tracing: if !quiescent -> flush FINAL (update
284 * timestamp_end), and set to true; the stream has entered a
285 * complete/quiescent state.
286 * - On "destroy" or stream/application hang-up: if !quiescent ->
287 * flush FINAL, and set to true.
289 * NOTE: Update and read are protected by the stream lock.
294 * metadata_timer_lock protects flags waiting_on_metadata and
295 * missed_metadata_flush.
297 pthread_mutex_t metadata_timer_lock
;
299 * Flag set when awaiting metadata to be pushed. Used in the
300 * timer thread to skip waiting on the stream (and stream lock) to
301 * ensure we can proceed to flushing metadata in live mode.
303 bool waiting_on_metadata
;
304 /* Raised when a timer misses a metadata flush. */
305 bool missed_metadata_flush
;
307 enum lttng_event_output output
;
308 /* Maximum subbuffer size. */
309 unsigned long max_sb_size
;
312 * Still used by the kernel for MMAP output. For UST, the ustctl getter is
313 * used for the mmap base and offset.
316 unsigned long mmap_len
;
321 /* UID/GID of the user owning the session to which stream belongs */
324 /* Network sequence number. Indicating on which relayd socket it goes. */
325 uint64_t net_seq_idx
;
327 * Indicate if this stream was successfully sent to a relayd. This is set
328 * after the refcount of the relayd is incremented and is checked when the
329 * stream is closed before decrementing the refcount in order to avoid an
332 unsigned int sent_to_relayd
;
334 /* Identify if the stream is the metadata */
335 unsigned int metadata_flag
;
337 * Last known metadata version, reset the metadata file in case
340 uint64_t metadata_version
;
341 /* Used when the stream is set for network streaming */
342 uint64_t relayd_stream_id
;
344 * When sending a stream packet to a relayd, this number is used to track
345 * the packet sent by the consumer and seen by the relayd. When sending the
346 * data header to the relayd, this number is sent and if the transmission
347 * was successful, it is incremented.
349 * Even if the full data is not fully transmitted it won't matter since
350 * only two possible error can happen after that where either the relayd
351 * died or a read error is detected on the stream making this value useless
354 * This value SHOULD be read/updated atomically or with the lock acquired.
356 uint64_t next_net_seq_num
;
358 * Lock to use the stream FDs since they are used between threads.
360 * This is nested INSIDE the consumer_data lock.
361 * This is nested INSIDE the channel lock.
362 * This is nested INSIDE the channel timer lock.
363 * This is nested OUTSIDE the metadata cache lock.
364 * This is nested OUTSIDE consumer_relayd_sock_pair lock.
366 pthread_mutex_t lock
;
367 /* Tracing session id */
370 * Indicates if the stream end point is still active or not (network
371 * streaming or local file system). The thread "owning" the stream is
372 * handling this status and can be notified of a state change through the
373 * consumer data appropriate pipe.
375 enum consumer_endpoint_status endpoint_status
;
376 /* Stream name. Format is: <channel_name>_<cpu_number> */
377 char name
[LTTNG_SYMBOL_NAME_LEN
];
378 /* Internal state of libustctl. */
379 struct ustctl_consumer_stream
*ustream
;
380 struct cds_list_head send_node
;
381 /* On-disk circular buffer */
382 uint64_t tracefile_size_current
;
383 uint64_t tracefile_count_current
;
385 * Monitor or not the streams of this channel meaning this indicates if the
386 * streams should be sent to the data/metadata thread or added to the no
387 * monitor list of the channel.
389 unsigned int monitor
;
391 * Indicate if the stream is globally visible meaning that it has been
392 * added to the multiple hash tables. If *not* set, NO lock should be
393 * acquired in the destroy path.
395 unsigned int globally_visible
;
397 * Pipe to wake up the metadata poll thread when the UST metadata
400 int ust_metadata_poll_pipe
[2];
402 * How much metadata was read from the metadata cache and sent
405 uint64_t ust_metadata_pushed
;
407 * Copy of the last discarded event value to detect the overflow of
410 uint64_t last_discarded_events
;
411 /* Copy of the sequence number of the last packet extracted. */
412 uint64_t last_sequence_number
;
414 * A stream is created with a trace_archive_id matching the session's
415 * current trace archive id at the time of the creation of the stream.
416 * It is incremented when the rotate_position is reached.
418 uint64_t trace_archive_id
;
420 * Index file object of the index file for this stream.
422 struct lttng_index_file
*index_file
;
425 * Local pipe to extract data when using splice.
430 * Rendez-vous point between data and metadata stream in live mode.
432 pthread_cond_t metadata_rdv
;
433 pthread_mutex_t metadata_rdv_lock
;
436 * rotate_position represents the position in the ring-buffer that has to
437 * be flushed to disk to complete the ongoing rotation. When that position
438 * is reached, this tracefile can be closed and a new one is created in
439 * channel_read_only_attributes.path.
441 unsigned long rotate_position
;
444 * Read-only copies of channel values. We cannot safely access the
445 * channel from a stream, so we need to have a local copy of these
446 * fields in the stream object. These fields should be removed from
447 * the stream objects when we introduce refcounting.
450 char path
[LTTNG_PATH_MAX
];
451 uint64_t tracefile_size
;
452 } channel_read_only_attributes
;
455 * Flag to inform the data or metadata thread that a stream is
456 * ready to be rotated.
460 /* Indicate if the stream still has some data to be read. */
461 unsigned int has_data
:1;
463 * Inform the consumer or relay to reset the metadata
464 * file before writing in it (regeneration).
466 unsigned int reset_metadata_flag
:1;
470 * Internal representation of a relayd socket pair.
472 struct consumer_relayd_sock_pair
{
473 /* Network sequence number. */
474 uint64_t net_seq_idx
;
475 /* Number of stream associated with this relayd */
479 * This flag indicates whether or not we should destroy this object. The
480 * destruction should ONLY occurs when this flag is set and the refcount is
483 unsigned int destroy_flag
;
486 * Mutex protecting the control socket to avoid out of order packets
487 * between threads sending data to the relayd. Since metadata data is sent
488 * over that socket, at least two sendmsg() are needed (header + data)
489 * creating a race for packets to overlap between threads using it.
491 * This is nested INSIDE the consumer_data lock.
492 * This is nested INSIDE the stream lock.
494 pthread_mutex_t ctrl_sock_mutex
;
496 /* Control socket. Command and metadata are passed over it */
497 struct lttcomm_relayd_sock control_sock
;
500 * We don't need a mutex at this point since we only splice or write single
501 * large chunk of data with a header appended at the begining. Moreover,
502 * this socket is for now only used in a single thread.
504 struct lttcomm_relayd_sock data_sock
;
505 struct lttng_ht_node_u64 node
;
507 /* Session id on both sides for the sockets. */
508 uint64_t relayd_session_id
;
509 uint64_t sessiond_session_id
;
510 struct lttng_consumer_local_data
*ctx
;
514 * UST consumer local data to the program. One or more instance per
517 struct lttng_consumer_local_data
{
519 * Function to call when data is available on a buffer.
520 * Returns the number of bytes read, or negative error value.
522 ssize_t (*on_buffer_ready
)(struct lttng_consumer_stream
*stream
,
523 struct lttng_consumer_local_data
*ctx
);
525 * function to call when we receive a new channel, it receives a
526 * newly allocated channel, depending on the return code of this
527 * function, the new channel will be handled by the application
531 * > 0 (success, FD is kept by application)
532 * == 0 (success, FD is left to library)
535 int (*on_recv_channel
)(struct lttng_consumer_channel
*channel
);
537 * function to call when we receive a new stream, it receives a
538 * newly allocated stream, depending on the return code of this
539 * function, the new stream will be handled by the application
543 * > 0 (success, FD is kept by application)
544 * == 0 (success, FD is left to library)
547 int (*on_recv_stream
)(struct lttng_consumer_stream
*stream
);
549 * function to call when a stream is getting updated by the session
550 * daemon, this function receives the sessiond key and the new
551 * state, depending on the return code of this function the
552 * update of state for the stream is handled by the application
556 * > 0 (success, FD is kept by application)
557 * == 0 (success, FD is left to library)
560 int (*on_update_stream
)(uint64_t sessiond_key
, uint32_t state
);
561 enum lttng_consumer_type type
;
562 /* socket to communicate errors with sessiond */
563 int consumer_error_socket
;
564 /* socket to ask metadata to sessiond. */
565 int consumer_metadata_socket
;
567 * Protect consumer_metadata_socket.
569 * This is nested OUTSIDE the metadata cache lock.
571 pthread_mutex_t metadata_socket_lock
;
572 /* socket to exchange commands with sessiond */
573 char *consumer_command_sock_path
;
574 /* communication with splice */
575 int consumer_channel_pipe
[2];
576 /* Data stream poll thread pipe. To transfer data stream to the thread */
577 struct lttng_pipe
*consumer_data_pipe
;
580 * Data thread use that pipe to catch wakeup from read subbuffer that
581 * detects that there is still data to be read for the stream encountered.
582 * Before doing so, the stream is flagged to indicate that there is still
585 * Both pipes (read/write) are owned and used inside the data thread.
587 struct lttng_pipe
*consumer_wakeup_pipe
;
588 /* Indicate if the wakeup thread has been notified. */
589 unsigned int has_wakeup
:1;
591 /* to let the signal handler wake up the fd receiver thread */
592 int consumer_should_quit
[2];
593 /* Metadata poll thread pipe. Transfer metadata stream to it */
594 struct lttng_pipe
*consumer_metadata_pipe
;
596 * Pipe used by the channel monitoring timers to provide state samples
597 * to the session daemon (write-only).
599 int channel_monitor_pipe
;
603 * Library-level data. One instance per process.
605 struct lttng_consumer_global_data
{
607 * At this time, this lock is used to ensure coherence between the count
608 * and number of element in the hash table. It's also a protection for
609 * concurrent read/write between threads.
611 * This is nested OUTSIDE the stream lock.
612 * This is nested OUTSIDE the consumer_relayd_sock_pair lock.
614 pthread_mutex_t lock
;
617 * Number of streams in the data stream hash table declared outside.
618 * Protected by consumer_data.lock.
622 /* Channel hash table protected by consumer_data.lock. */
623 struct lttng_ht
*channel_ht
;
625 * Flag specifying if the local array of FDs needs update in the
626 * poll function. Protected by consumer_data.lock.
628 unsigned int need_update
;
629 enum lttng_consumer_type type
;
632 * Relayd socket(s) hashtable indexed by network sequence number. Each
633 * stream has an index which associate the right relayd socket to use.
635 struct lttng_ht
*relayd_ht
;
638 * This hash table contains all streams (metadata and data) indexed by
639 * session id. In other words, the ht is indexed by session id and each
640 * bucket contains the list of associated streams.
642 * This HT uses the "node_session_id" of the consumer stream.
644 struct lttng_ht
*stream_list_ht
;
647 * This HT uses the "node_channel_id" of the consumer stream.
649 struct lttng_ht
*stream_per_chan_id_ht
;
653 * Set to nonzero when the consumer is exiting. Updated by signal
654 * handler and thread exit, read by threads.
656 extern int consumer_quit
;
659 * Set to nonzero when the consumer is exiting. Updated by signal
660 * handler and thread exit, read by threads.
662 extern int consumer_quit
;
664 /* Flag used to temporarily pause data consumption from testpoints. */
665 extern int data_consumption_paused
;
667 /* Return a human-readable consumer type string that is suitable for logging. */
669 const char *lttng_consumer_type_str(enum lttng_consumer_type type
)
672 case LTTNG_CONSUMER_UNKNOWN
:
674 case LTTNG_CONSUMER_KERNEL
:
676 case LTTNG_CONSUMER32_UST
:
677 return "32-bit user space";
678 case LTTNG_CONSUMER64_UST
:
679 return "64-bit user space";
686 * Init consumer data structures.
688 int lttng_consumer_init(void);
691 * Set the error socket for communication with a session daemon.
693 void lttng_consumer_set_error_sock(struct lttng_consumer_local_data
*ctx
,
697 * Set the command socket path for communication with a session daemon.
699 void lttng_consumer_set_command_sock_path(
700 struct lttng_consumer_local_data
*ctx
, char *sock
);
703 * Send return code to session daemon.
705 * Returns the return code of sendmsg : the number of bytes transmitted or -1
708 int lttng_consumer_send_error(struct lttng_consumer_local_data
*ctx
, int cmd
);
711 * Called from signal handler to ensure a clean exit.
713 void lttng_consumer_should_exit(struct lttng_consumer_local_data
*ctx
);
716 * Cleanup the daemon's socket on exit.
718 void lttng_consumer_cleanup(void);
721 * Poll on the should_quit pipe and the command socket return -1 on error and
722 * should exit, 0 if data is available on the command socket
724 int lttng_consumer_poll_socket(struct pollfd
*kconsumer_sockpoll
);
727 * Copy the fields from the channel that need to be accessed (read-only)
728 * directly from the stream.
730 void consumer_stream_update_channel_attributes(
731 struct lttng_consumer_stream
*stream
,
732 struct lttng_consumer_channel
*channel
);
734 struct lttng_consumer_stream
*consumer_allocate_stream(uint64_t channel_key
,
736 enum lttng_consumer_stream_state state
,
737 const char *channel_name
,
744 enum consumer_channel_type type
,
745 unsigned int monitor
,
746 uint64_t trace_archive_id
);
747 struct lttng_consumer_channel
*consumer_allocate_channel(uint64_t key
,
749 const char *pathname
,
754 enum lttng_event_output output
,
755 uint64_t tracefile_size
,
756 uint64_t tracefile_count
,
757 uint64_t session_id_per_pid
,
758 unsigned int monitor
,
759 unsigned int live_timer_interval
,
760 const char *root_shm_path
,
761 const char *shm_path
);
762 void consumer_del_stream(struct lttng_consumer_stream
*stream
,
763 struct lttng_ht
*ht
);
764 void consumer_del_metadata_stream(struct lttng_consumer_stream
*stream
,
765 struct lttng_ht
*ht
);
766 int consumer_add_channel(struct lttng_consumer_channel
*channel
,
767 struct lttng_consumer_local_data
*ctx
);
768 void consumer_del_channel(struct lttng_consumer_channel
*channel
);
770 /* lttng-relayd consumer command */
771 struct consumer_relayd_sock_pair
*consumer_find_relayd(uint64_t key
);
772 int consumer_send_relayd_stream(struct lttng_consumer_stream
*stream
, char *path
);
773 int consumer_send_relayd_streams_sent(uint64_t net_seq_idx
);
774 void close_relayd_stream(struct lttng_consumer_stream
*stream
);
775 struct lttng_consumer_channel
*consumer_find_channel(uint64_t key
);
776 int consumer_handle_stream_before_relayd(struct lttng_consumer_stream
*stream
,
778 void consumer_steal_stream_key(int key
, struct lttng_ht
*ht
);
780 struct lttng_consumer_local_data
*lttng_consumer_create(
781 enum lttng_consumer_type type
,
782 ssize_t (*buffer_ready
)(struct lttng_consumer_stream
*stream
,
783 struct lttng_consumer_local_data
*ctx
),
784 int (*recv_channel
)(struct lttng_consumer_channel
*channel
),
785 int (*recv_stream
)(struct lttng_consumer_stream
*stream
),
786 int (*update_stream
)(uint64_t sessiond_key
, uint32_t state
));
787 void lttng_consumer_destroy(struct lttng_consumer_local_data
*ctx
);
788 ssize_t
lttng_consumer_on_read_subbuffer_mmap(
789 struct lttng_consumer_local_data
*ctx
,
790 struct lttng_consumer_stream
*stream
, unsigned long len
,
791 unsigned long padding
,
792 struct ctf_packet_index
*index
);
793 ssize_t
lttng_consumer_on_read_subbuffer_splice(
794 struct lttng_consumer_local_data
*ctx
,
795 struct lttng_consumer_stream
*stream
, unsigned long len
,
796 unsigned long padding
,
797 struct ctf_packet_index
*index
);
798 int lttng_consumer_sample_snapshot_positions(struct lttng_consumer_stream
*stream
);
799 int lttng_consumer_take_snapshot(struct lttng_consumer_stream
*stream
);
800 int lttng_consumer_get_produced_snapshot(struct lttng_consumer_stream
*stream
,
802 int lttng_consumer_get_consumed_snapshot(struct lttng_consumer_stream
*stream
,
804 int lttng_ustconsumer_get_wakeup_fd(struct lttng_consumer_stream
*stream
);
805 int lttng_ustconsumer_close_wakeup_fd(struct lttng_consumer_stream
*stream
);
806 void *consumer_thread_metadata_poll(void *data
);
807 void *consumer_thread_data_poll(void *data
);
808 void *consumer_thread_sessiond_poll(void *data
);
809 void *consumer_thread_channel_poll(void *data
);
810 int lttng_consumer_recv_cmd(struct lttng_consumer_local_data
*ctx
,
811 int sock
, struct pollfd
*consumer_sockpoll
);
813 ssize_t
lttng_consumer_read_subbuffer(struct lttng_consumer_stream
*stream
,
814 struct lttng_consumer_local_data
*ctx
);
815 int lttng_consumer_on_recv_stream(struct lttng_consumer_stream
*stream
);
816 void consumer_add_relayd_socket(uint64_t net_seq_idx
, int sock_type
,
817 struct lttng_consumer_local_data
*ctx
, int sock
,
818 struct pollfd
*consumer_sockpoll
, struct lttcomm_relayd_sock
*relayd_sock
,
819 uint64_t sessiond_id
, uint64_t relayd_session_id
);
820 void consumer_flag_relayd_for_destroy(
821 struct consumer_relayd_sock_pair
*relayd
);
822 int consumer_data_pending(uint64_t id
);
823 int consumer_send_status_msg(int sock
, int ret_code
);
824 int consumer_send_status_channel(int sock
,
825 struct lttng_consumer_channel
*channel
);
826 void notify_thread_del_channel(struct lttng_consumer_local_data
*ctx
,
828 void consumer_destroy_relayd(struct consumer_relayd_sock_pair
*relayd
);
829 unsigned long consumer_get_consume_start_pos(unsigned long consumed_pos
,
830 unsigned long produced_pos
, uint64_t nb_packets_per_stream
,
831 uint64_t max_sb_size
);
832 void consumer_add_data_stream(struct lttng_consumer_stream
*stream
);
833 void consumer_del_stream_for_data(struct lttng_consumer_stream
*stream
);
834 void consumer_add_metadata_stream(struct lttng_consumer_stream
*stream
);
835 void consumer_del_stream_for_metadata(struct lttng_consumer_stream
*stream
);
836 int consumer_create_index_file(struct lttng_consumer_stream
*stream
);
837 int lttng_consumer_rotate_channel(struct lttng_consumer_channel
*channel
,
838 uint64_t key
, const char *path
, uint64_t relayd_id
,
839 uint32_t metadata
, uint64_t new_chunk_id
,
840 struct lttng_consumer_local_data
*ctx
);
841 int lttng_consumer_stream_is_rotate_ready(struct lttng_consumer_stream
*stream
);
842 int lttng_consumer_rotate_stream(struct lttng_consumer_local_data
*ctx
,
843 struct lttng_consumer_stream
*stream
, bool *rotated
);
844 int lttng_consumer_rotate_ready_streams(struct lttng_consumer_channel
*channel
,
845 uint64_t key
, struct lttng_consumer_local_data
*ctx
);
846 int lttng_consumer_rotate_rename(const char *current_path
, const char *new_path
,
847 uid_t uid
, gid_t gid
, uint64_t relayd_id
);
848 int lttng_consumer_check_rotation_pending_local(uint64_t session_id
,
850 int lttng_consumer_check_rotation_pending_relay(uint64_t session_id
,
851 uint64_t relayd_id
, uint64_t chunk_id
);
852 void lttng_consumer_reset_stream_rotate_state(struct lttng_consumer_stream
*stream
);
853 int lttng_consumer_mkdir(const char *path
, uid_t uid
, gid_t gid
,
855 void lttng_consumer_cleanup_relayd(struct consumer_relayd_sock_pair
*relayd
);
857 #endif /* LIB_CONSUMER_H */