[lttng-tools.git] / src / common / consumer.h

/*
 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
 * Copyright (C) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License, version 2 only,
 * as published by the Free Software Foundation.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _LTTNG_CONSUMER_H
#define _LTTNG_CONSUMER_H

#include <limits.h>
#include <poll.h>
#include <unistd.h>

#include <lttng/lttng.h>

#include <common/hashtable/hashtable.h>
#include <common/compat/fcntl.h>

/*
 * When the receiving thread dies, we need to have a way to make the polling
 * thread exit eventually. If all FDs hang up (normal case when the
 * lttng-sessiond stops), we can exit cleanly, but if there is a problem and
 * for whatever reason some FDs remain open, the consumer should still exit
 * eventually.
 *
 * If the timeout is reached, it means that during this period no events
 * occurred on the FDs so we need to force an exit. This case should not happen
 * but it is a safety to ensure we won't block the consumer indefinitely.
 *
 * The value of 2 seconds is an arbitrary choice.
 */
#define LTTNG_CONSUMER_POLL_TIMEOUT 2000

/* Commands for consumer */
enum lttng_consumer_command {
	LTTNG_CONSUMER_ADD_CHANNEL,
	LTTNG_CONSUMER_ADD_STREAM,
	/* pause, delete, active depending on fd state */
	LTTNG_CONSUMER_UPDATE_STREAM,
	/* inform the consumer to quit when all fd has hang up */
	LTTNG_CONSUMER_STOP,
};

/* State of each fd in consumer */
enum lttng_consumer_stream_state {
	LTTNG_CONSUMER_ACTIVE_STREAM,
	LTTNG_CONSUMER_PAUSE_STREAM,
	LTTNG_CONSUMER_DELETE_STREAM,
};

enum lttng_consumer_type {
	LTTNG_CONSUMER_UNKNOWN = 0,
	LTTNG_CONSUMER_KERNEL,
	LTTNG_CONSUMER64_UST,
	LTTNG_CONSUMER32_UST,
};

struct lttng_consumer_channel {
	struct lttng_ht_node_ulong node;
	int key;
	uint64_t max_sb_size; /* the subbuffer size for this channel */
	int refcount; /* Number of streams referencing this channel */
	/* For UST */
	int shm_fd;
	int wait_fd;
	void *mmap_base;
	size_t mmap_len;
	struct lttng_ust_shm_handle *handle;
	int nr_streams;
	int wait_fd_is_copy;
	int cpucount;
};

/* Forward declaration for UST. */
struct lttng_ust_lib_ring_buffer;

/*
 * Internal representation of the streams, sessiond_key is used to identify
 * uniquely a stream.
 */
struct lttng_consumer_stream {
	struct lttng_ht_node_ulong node;
	struct lttng_consumer_channel *chan;	/* associated channel */
	/*
	 * key is the key used by the session daemon to refer to the
	 * object in the consumer daemon.
	 */
	int key;
	int shm_fd;
	int wait_fd;
	int out_fd; /* output file to write the data */
	off_t out_fd_offset; /* write position in the output file descriptor */
	char path_name[PATH_MAX]; /* tracefile name */
	enum lttng_consumer_stream_state state;
	size_t shm_len;
	void *mmap_base;
	size_t mmap_len;
	enum lttng_event_output output; /* splice or mmap */
	int shm_fd_is_copy;
	int wait_fd_is_copy;
	/* For UST */
	struct lttng_ust_lib_ring_buffer *buf;
	int cpu;
	int data_read;
	int hangup_flush_done;
	/* UID/GID of the user owning the session to which stream belongs */
	uid_t uid;
	gid_t gid;
};

/*
 * UST consumer local data to the program. One or more instance per
 * process.
 */
struct lttng_consumer_local_data {
	/*
	 * Function to call when data is available on a buffer.
	 * Returns the number of bytes read, or negative error value.
	 */
	ssize_t (*on_buffer_ready)(struct lttng_consumer_stream *stream,
			struct lttng_consumer_local_data *ctx);
	/*
	 * function to call when we receive a new channel, it receives a
	 * newly allocated channel, depending on the return code of this
	 * function, the new channel will be handled by the application
	 * or the library.
	 *
	 * Returns:
	 *    > 0 (success, FD is kept by application)
	 *   == 0 (success, FD is left to library)
	 *    < 0 (error)
	 */
	int (*on_recv_channel)(struct lttng_consumer_channel *channel);
	/*
	 * function to call when we receive a new stream, it receives a
	 * newly allocated stream, depending on the return code of this
	 * function, the new stream will be handled by the application
	 * or the library.
	 *
	 * Returns:
	 *    > 0 (success, FD is kept by application)
	 *   == 0 (success, FD is left to library)
	 *    < 0 (error)
	 */
	int (*on_recv_stream)(struct lttng_consumer_stream *stream);
	/*
	 * function to call when a stream is getting updated by the session
	 * daemon, this function receives the sessiond key and the new
	 * state, depending on the return code of this function the
	 * update of state for the stream is handled by the application
	 * or the library.
	 *
	 * Returns:
	 *    > 0 (success, FD is kept by application)
	 *   == 0 (success, FD is left to library)
	 *    < 0 (error)
	 */
	int (*on_update_stream)(int sessiond_key, uint32_t state);
	/* socket to communicate errors with sessiond */
	int consumer_error_socket;
	/* socket to exchange commands with sessiond */
	char *consumer_command_sock_path;
	/* communication with splice */
	int consumer_thread_pipe[2];
	/* pipe to wake the poll thread when necessary */
	int consumer_poll_pipe[2];
	/* to let the signal handler wake up the fd receiver thread */
	int consumer_should_quit[2];
};

/*
 * Library-level data. One instance per process.
 */
struct lttng_consumer_global_data {

	/*
	 * At this time, this lock is used to ensure coherence between the count
	 * and number of element in the hash table. It's also a protection for
	 * concurrent read/write between threads.
	 *
	 * XXX: We need to see if this lock is still needed with the lockless RCU
	 * hash tables.
	 */
	pthread_mutex_t lock;

	/*
	 * Number of streams in the hash table. Protected by consumer_data.lock.
	 */
	int stream_count;
	/*
	 * Hash tables of streams and channels. Protected by consumer_data.lock.
	 */
	struct lttng_ht *stream_ht;
	struct lttng_ht *channel_ht;
	/*
	 * Flag specifying if the local array of FDs needs update in the
	 * poll function. Protected by consumer_data.lock.
	 */
	unsigned int need_update;
	enum lttng_consumer_type type;
};

/*
 * Init consumer data structures.
 */
extern void lttng_consumer_init(void);

/*
 * Set the error socket for communication with a session daemon.
 */
extern void lttng_consumer_set_error_sock(
		struct lttng_consumer_local_data *ctx, int sock);

/*
 * Set the command socket path for communication with a session daemon.
 */
extern void lttng_consumer_set_command_sock_path(
		struct lttng_consumer_local_data *ctx, char *sock);

/*
 * Send return code to session daemon.
 *
 * Returns the return code of sendmsg : the number of bytes transmitted or -1
 * on error.
 */
extern int lttng_consumer_send_error(
		struct lttng_consumer_local_data *ctx, int cmd);

/*
 * Called from signal handler to ensure a clean exit.
 */
extern void lttng_consumer_should_exit(
		struct lttng_consumer_local_data *ctx);

/*
 * Cleanup the daemon's socket on exit.
 */
extern void lttng_consumer_cleanup(void);

/*
 * Flush pending writes to trace output disk file.
 */
extern void lttng_consumer_sync_trace_file(
		struct lttng_consumer_stream *stream, off_t orig_offset);

/*
 * Poll on the should_quit pipe and the command socket return -1 on error and
 * should exit, 0 if data is available on the command socket
 */
extern int lttng_consumer_poll_socket(struct pollfd *kconsumer_sockpoll);

extern int consumer_update_poll_array(
		struct lttng_consumer_local_data *ctx, struct pollfd **pollfd,
		struct lttng_consumer_stream **local_consumer_streams);

extern struct lttng_consumer_stream *consumer_allocate_stream(
		int channel_key, int stream_key,
		int shm_fd, int wait_fd,
		enum lttng_consumer_stream_state state,
		uint64_t mmap_len,
		enum lttng_event_output output,
		const char *path_name,
		uid_t uid,
		gid_t gid);
extern int consumer_add_stream(struct lttng_consumer_stream *stream);
extern void consumer_del_stream(struct lttng_consumer_stream *stream);
extern void consumer_change_stream_state(int stream_key,
		enum lttng_consumer_stream_state state);
extern void consumer_del_channel(struct lttng_consumer_channel *channel);
extern struct lttng_consumer_channel *consumer_allocate_channel(
		int channel_key,
		int shm_fd, int wait_fd,
		uint64_t mmap_len,
		uint64_t max_sb_size);
int consumer_add_channel(struct lttng_consumer_channel *channel);

extern struct lttng_consumer_local_data *lttng_consumer_create(
		enum lttng_consumer_type type,
		ssize_t (*buffer_ready)(struct lttng_consumer_stream *stream,
			struct lttng_consumer_local_data *ctx),
		int (*recv_channel)(struct lttng_consumer_channel *channel),
		int (*recv_stream)(struct lttng_consumer_stream *stream),
		int (*update_stream)(int sessiond_key, uint32_t state));
extern void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx);
extern ssize_t lttng_consumer_on_read_subbuffer_mmap(
		struct lttng_consumer_local_data *ctx,
		struct lttng_consumer_stream *stream, unsigned long len);
extern ssize_t lttng_consumer_on_read_subbuffer_splice(
		struct lttng_consumer_local_data *ctx,
		struct lttng_consumer_stream *stream, unsigned long len);
extern int lttng_consumer_take_snapshot(struct lttng_consumer_local_data *ctx,
		struct lttng_consumer_stream *stream);
extern int lttng_consumer_get_produced_snapshot(
		struct lttng_consumer_local_data *ctx,
		struct lttng_consumer_stream *stream,
		unsigned long *pos);
extern void *lttng_consumer_thread_poll_fds(void *data);
extern void *lttng_consumer_thread_receive_fds(void *data);
extern int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx,
		int sock, struct pollfd *consumer_sockpoll);

ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream,
		struct lttng_consumer_local_data *ctx);
int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream);

#endif /* _LTTNG_CONSUMER_H */
Commit	Line	Data
3bd1e081 MD	1	/*
	2	* Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
	3	* Copyright (C) 2011 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	4	*
d14d33bf AM	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License, version 2 only,
	7	* as published by the Free Software Foundation.
3bd1e081	8	*
d14d33bf AM	9	* This program is distributed in the hope that it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
3bd1e081	13	*
d14d33bf AM	14	* You should have received a copy of the GNU General Public License along
	15	* with this program; if not, write to the Free Software Foundation, Inc.,
	16	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
3bd1e081 MD	17	*/
	18
	19	#ifndef _LTTNG_CONSUMER_H
	20	#define _LTTNG_CONSUMER_H
	21
	22	#include <limits.h>
	23	#include <poll.h>
6df2e2c9	24	#include <unistd.h>
e4421fec	25
3bd1e081	26	#include <lttng/lttng.h>
10a8a223	27
b9182dd9 DG	28	#include <common/hashtable/hashtable.h>
b9182dd9 DG	29	#include <common/compat/fcntl.h>
3bd1e081 MD	30
	31	/*
	32	* When the receiving thread dies, we need to have a way to make the polling
	33	* thread exit eventually. If all FDs hang up (normal case when the
32258573 DG	34	* lttng-sessiond stops), we can exit cleanly, but if there is a problem and
32258573 DG	35	* for whatever reason some FDs remain open, the consumer should still exit
3bd1e081 MD	36	* eventually.
	37	*
	38	* If the timeout is reached, it means that during this period no events
	39	* occurred on the FDs so we need to force an exit. This case should not happen
	40	* but it is a safety to ensure we won't block the consumer indefinitely.
	41	*
	42	* The value of 2 seconds is an arbitrary choice.
	43	*/
	44	#define LTTNG_CONSUMER_POLL_TIMEOUT 2000
	45
	46	/* Commands for consumer */
	47	enum lttng_consumer_command {
	48	LTTNG_CONSUMER_ADD_CHANNEL,
	49	LTTNG_CONSUMER_ADD_STREAM,
	50	/* pause, delete, active depending on fd state */
	51	LTTNG_CONSUMER_UPDATE_STREAM,
	52	/* inform the consumer to quit when all fd has hang up */
	53	LTTNG_CONSUMER_STOP,
	54	};
	55
	56	/* State of each fd in consumer */
	57	enum lttng_consumer_stream_state {
	58	LTTNG_CONSUMER_ACTIVE_STREAM,
	59	LTTNG_CONSUMER_PAUSE_STREAM,
	60	LTTNG_CONSUMER_DELETE_STREAM,
	61	};
	62
3bd1e081 MD	63	enum lttng_consumer_type {
	64	LTTNG_CONSUMER_UNKNOWN = 0,
	65	LTTNG_CONSUMER_KERNEL,
7753dea8 MD	66	LTTNG_CONSUMER64_UST,
7753dea8 MD	67	LTTNG_CONSUMER32_UST,
3bd1e081 MD	68	};
	69
	70	struct lttng_consumer_channel {
e4421fec	71	struct lttng_ht_node_ulong node;
3bd1e081 MD	72	int key;
	73	uint64_t max_sb_size; /* the subbuffer size for this channel */
	74	int refcount; /* Number of streams referencing this channel */
	75	/* For UST */
	76	int shm_fd;
	77	int wait_fd;
	78	void *mmap_base;
	79	size_t mmap_len;
13161846	80	struct lttng_ust_shm_handle *handle;
3bd1e081	81	int nr_streams;
b5c5fc29	82	int wait_fd_is_copy;
5af2f756	83	int cpucount;
3bd1e081 MD	84	};
	85
	86	/* Forward declaration for UST. */
13161846	87	struct lttng_ust_lib_ring_buffer;
3bd1e081 MD	88
	89	/*
	90	* Internal representation of the streams, sessiond_key is used to identify
	91	* uniquely a stream.
	92	*/
	93	struct lttng_consumer_stream {
e4421fec	94	struct lttng_ht_node_ulong node;
3bd1e081 MD	95	struct lttng_consumer_channel chan; / associated channel */
	96	/*
	97	* key is the key used by the session daemon to refer to the
	98	* object in the consumer daemon.
	99	*/
	100	int key;
	101	int shm_fd;
	102	int wait_fd;
	103	int out_fd; /* output file to write the data */
	104	off_t out_fd_offset; /* write position in the output file descriptor */
	105	char path_name[PATH_MAX]; /* tracefile name */
	106	enum lttng_consumer_stream_state state;
	107	size_t shm_len;
	108	void *mmap_base;
	109	size_t mmap_len;
	110	enum lttng_event_output output; /* splice or mmap */
b5c5fc29 MD	111	int shm_fd_is_copy;
b5c5fc29 MD	112	int wait_fd_is_copy;
3bd1e081	113	/* For UST */
13161846	114	struct lttng_ust_lib_ring_buffer *buf;
3bd1e081	115	int cpu;
4078b776	116	int data_read;
d056b477	117	int hangup_flush_done;
6df2e2c9 MD	118	/* UID/GID of the user owning the session to which stream belongs */
	119	uid_t uid;
	120	gid_t gid;
3bd1e081 MD	121	};
	122
	123	/*
	124	* UST consumer local data to the program. One or more instance per
	125	* process.
	126	*/
	127	struct lttng_consumer_local_data {
4078b776 MD	128	/*
	129	* Function to call when data is available on a buffer.
	130	* Returns the number of bytes read, or negative error value.
	131	*/
	132	ssize_t (on_buffer_ready)(struct lttng_consumer_stream stream,
d41f73b7	133	struct lttng_consumer_local_data *ctx);
3bd1e081 MD	134	/*
	135	* function to call when we receive a new channel, it receives a
	136	* newly allocated channel, depending on the return code of this
	137	* function, the new channel will be handled by the application
	138	* or the library.
	139	*
	140	* Returns:
	141	* > 0 (success, FD is kept by application)
	142	* == 0 (success, FD is left to library)
	143	* < 0 (error)
	144	*/
	145	int (on_recv_channel)(struct lttng_consumer_channel channel);
	146	/*
	147	* function to call when we receive a new stream, it receives a
	148	* newly allocated stream, depending on the return code of this
	149	* function, the new stream will be handled by the application
	150	* or the library.
	151	*
	152	* Returns:
	153	* > 0 (success, FD is kept by application)
	154	* == 0 (success, FD is left to library)
	155	* < 0 (error)
	156	*/
	157	int (on_recv_stream)(struct lttng_consumer_stream stream);
	158	/*
	159	* function to call when a stream is getting updated by the session
	160	* daemon, this function receives the sessiond key and the new
	161	* state, depending on the return code of this function the
	162	* update of state for the stream is handled by the application
	163	* or the library.
	164	*
	165	* Returns:
	166	* > 0 (success, FD is kept by application)
	167	* == 0 (success, FD is left to library)
	168	* < 0 (error)
	169	*/
	170	int (*on_update_stream)(int sessiond_key, uint32_t state);
	171	/* socket to communicate errors with sessiond */
	172	int consumer_error_socket;
	173	/* socket to exchange commands with sessiond */
	174	char *consumer_command_sock_path;
	175	/* communication with splice */
	176	int consumer_thread_pipe[2];
	177	/* pipe to wake the poll thread when necessary */
	178	int consumer_poll_pipe[2];
	179	/* to let the signal handler wake up the fd receiver thread */
	180	int consumer_should_quit[2];
	181	};
	182
	183	/*
	184	* Library-level data. One instance per process.
	185	*/
	186	struct lttng_consumer_global_data {
e4421fec	187
3bd1e081	188	/*
e4421fec DG	189	* At this time, this lock is used to ensure coherence between the count
e4421fec DG	190	* and number of element in the hash table. It's also a protection for
6065ceec DG	191	* concurrent read/write between threads.
	192	*
	193	* XXX: We need to see if this lock is still needed with the lockless RCU
	194	* hash tables.
3bd1e081 MD	195	*/
3bd1e081 MD	196	pthread_mutex_t lock;
e4421fec	197
3bd1e081	198	/*
e4421fec	199	* Number of streams in the hash table. Protected by consumer_data.lock.
3bd1e081 MD	200	*/
	201	int stream_count;
	202	/*
e4421fec	203	* Hash tables of streams and channels. Protected by consumer_data.lock.
3bd1e081	204	*/
e4421fec DG	205	struct lttng_ht *stream_ht;
e4421fec DG	206	struct lttng_ht *channel_ht;
3bd1e081 MD	207	/*
	208	* Flag specifying if the local array of FDs needs update in the
	209	* poll function. Protected by consumer_data.lock.
	210	*/
	211	unsigned int need_update;
	212	enum lttng_consumer_type type;
	213	};
	214
e4421fec DG	215	/*
	216	* Init consumer data structures.
	217	*/
	218	extern void lttng_consumer_init(void);
	219
3bd1e081 MD	220	/*
	221	* Set the error socket for communication with a session daemon.
	222	*/
	223	extern void lttng_consumer_set_error_sock(
	224	struct lttng_consumer_local_data *ctx, int sock);
	225
	226	/*
	227	* Set the command socket path for communication with a session daemon.
	228	*/
	229	extern void lttng_consumer_set_command_sock_path(
	230	struct lttng_consumer_local_data ctx, char sock);
	231
	232	/*
	233	* Send return code to session daemon.
	234	*
	235	* Returns the return code of sendmsg : the number of bytes transmitted or -1
	236	* on error.
	237	*/
	238	extern int lttng_consumer_send_error(
	239	struct lttng_consumer_local_data *ctx, int cmd);
	240
	241	/*
	242	* Called from signal handler to ensure a clean exit.
	243	*/
	244	extern void lttng_consumer_should_exit(
	245	struct lttng_consumer_local_data *ctx);
	246
	247	/*
	248	* Cleanup the daemon's socket on exit.
	249	*/
	250	extern void lttng_consumer_cleanup(void);
	251
	252	/*
	253	* Flush pending writes to trace output disk file.
	254	*/
	255	extern void lttng_consumer_sync_trace_file(
	256	struct lttng_consumer_stream *stream, off_t orig_offset);
	257
	258	/*
	259	* Poll on the should_quit pipe and the command socket return -1 on error and
	260	* should exit, 0 if data is available on the command socket
	261	*/
	262	extern int lttng_consumer_poll_socket(struct pollfd *kconsumer_sockpoll);
	263
	264	extern int consumer_update_poll_array(
	265	struct lttng_consumer_local_data ctx, struct pollfd *pollfd,
	266	struct lttng_consumer_stream **local_consumer_streams);
	267
	268	extern struct lttng_consumer_stream *consumer_allocate_stream(
	269	int channel_key, int stream_key,
	270	int shm_fd, int wait_fd,
	271	enum lttng_consumer_stream_state state,
	272	uint64_t mmap_len,
	273	enum lttng_event_output output,
6df2e2c9 MD	274	const char *path_name,
	275	uid_t uid,
	276	gid_t gid);
3bd1e081 MD	277	extern int consumer_add_stream(struct lttng_consumer_stream *stream);
	278	extern void consumer_del_stream(struct lttng_consumer_stream *stream);
	279	extern void consumer_change_stream_state(int stream_key,
	280	enum lttng_consumer_stream_state state);
	281	extern void consumer_del_channel(struct lttng_consumer_channel *channel);
	282	extern struct lttng_consumer_channel *consumer_allocate_channel(
	283	int channel_key,
	284	int shm_fd, int wait_fd,
	285	uint64_t mmap_len,
	286	uint64_t max_sb_size);
	287	int consumer_add_channel(struct lttng_consumer_channel *channel);
	288
	289	extern struct lttng_consumer_local_data *lttng_consumer_create(
	290	enum lttng_consumer_type type,
4078b776	291	ssize_t (buffer_ready)(struct lttng_consumer_stream stream,
d41f73b7	292	struct lttng_consumer_local_data *ctx),
3bd1e081 MD	293	int (recv_channel)(struct lttng_consumer_channel channel),
	294	int (recv_stream)(struct lttng_consumer_stream stream),
	295	int (*update_stream)(int sessiond_key, uint32_t state));
	296	extern void lttng_consumer_destroy(struct lttng_consumer_local_data *ctx);
4078b776	297	extern ssize_t lttng_consumer_on_read_subbuffer_mmap(
3bd1e081 MD	298	struct lttng_consumer_local_data *ctx,
3bd1e081 MD	299	struct lttng_consumer_stream *stream, unsigned long len);
4078b776	300	extern ssize_t lttng_consumer_on_read_subbuffer_splice(
3bd1e081 MD	301	struct lttng_consumer_local_data *ctx,
	302	struct lttng_consumer_stream *stream, unsigned long len);
	303	extern int lttng_consumer_take_snapshot(struct lttng_consumer_local_data *ctx,
	304	struct lttng_consumer_stream *stream);
	305	extern int lttng_consumer_get_produced_snapshot(
	306	struct lttng_consumer_local_data *ctx,
	307	struct lttng_consumer_stream *stream,
	308	unsigned long *pos);
	309	extern void lttng_consumer_thread_poll_fds(void data);
	310	extern void lttng_consumer_thread_receive_fds(void data);
	311	extern int lttng_consumer_recv_cmd(struct lttng_consumer_local_data *ctx,
	312	int sock, struct pollfd *consumer_sockpoll);
	313
4078b776	314	ssize_t lttng_consumer_read_subbuffer(struct lttng_consumer_stream *stream,
d41f73b7 MD	315	struct lttng_consumer_local_data *ctx);
	316	int lttng_consumer_on_recv_stream(struct lttng_consumer_stream *stream);
	317
3bd1e081	318	#endif /* _LTTNG_CONSUMER_H */