[lttng-ust.git] / src / common / ustcomm.h

/*
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (C) 2011 EfficiOS Inc.
 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

/*
 * This header is meant for liblttng and libust internal use ONLY.
 * These declarations should NOT be considered stable API.
 */

#ifndef _UST_COMMON_UST_COMM_H
#define _UST_COMMON_UST_COMM_H

#include <stdint.h>
#include <limits.h>
#include <unistd.h>
#include <lttng/ust-abi.h>
#include <lttng/ust-abi-old.h>
#include <lttng/ust-error.h>
#include <lttng/ust-compiler.h>
#include <lttng/ust-ctl.h>

/*
 * Default timeout the application waits for the sessiond to send its
 * "register done" command. Can be overridden with the environment
 * variable "LTTNG_UST_REGISTER_TIMEOUT". Note that if the sessiond is not
 * found, the application proceeds directly without any delay.
 */
#define LTTNG_UST_DEFAULT_CONSTRUCTOR_TIMEOUT_MS	3000

#define LTTNG_DEFAULT_RUNDIR				LTTNG_SYSTEM_RUNDIR
#define LTTNG_DEFAULT_HOME_RUNDIR			".lttng"

/* Queue size of listen(2) */
#define LTTNG_UST_COMM_MAX_LISTEN			10
#define LTTNG_UST_COMM_REG_MSG_PADDING			64

struct lttng_ust_event_field;
struct lttng_ust_ctx_field;
struct lttng_ust_enum_entry;
struct lttng_integer_type;
struct lttng_ust_session;

struct lttng_ust_ctl_reg_msg {
	uint32_t magic;
	uint32_t major;
	uint32_t minor;
	uint32_t pid;
	uint32_t ppid;
	uint32_t uid;
	uint32_t gid;
	uint32_t bits_per_long;
	uint32_t uint8_t_alignment;
	uint32_t uint16_t_alignment;
	uint32_t uint32_t_alignment;
	uint32_t uint64_t_alignment;
	uint32_t long_alignment;
	uint32_t socket_type;			/* enum lttng_ust_ctl_socket_type */
	char name[LTTNG_UST_ABI_PROCNAME_LEN];	/* process name */
	char padding[LTTNG_UST_COMM_REG_MSG_PADDING];
} __attribute__((packed));

/*
 * Data structure for the commands sent from sessiond to UST.
 */
#define USTCOMM_MSG_PADDING1		32
#define USTCOMM_MSG_PADDING2		32
struct ustcomm_ust_msg {
	uint32_t handle;
	uint32_t cmd;
	char padding[USTCOMM_MSG_PADDING1];
	union {
		struct lttng_ust_abi_channel channel;
		struct lttng_ust_abi_stream stream;
		struct lttng_ust_abi_event event;
		struct lttng_ust_abi_context context;
		struct lttng_ust_abi_tracer_version version;
		struct lttng_ust_abi_tracepoint_iter tracepoint;
		struct {
			uint32_t data_size;	/* following filter data */
			uint32_t reloc_offset;
			uint64_t seqnum;
		} __attribute__((packed)) filter;
		struct {
			uint32_t count;	/* how many names follow */
		} __attribute__((packed)) exclusion;
		struct {
			uint32_t data_size;	/* following capture data */
			uint32_t reloc_offset;
			uint64_t seqnum;
		} __attribute__((packed)) capture;
		struct lttng_ust_abi_old_counter counter_old;
		struct lttng_ust_abi_old_counter_global counter_global_old;
		struct lttng_ust_abi_old_counter_cpu counter_cpu_old;
		struct {
			uint32_t cmd_len;
		} __attribute__((packed)) var_len_cmd;
		char padding[USTCOMM_MSG_PADDING2];
	} u;
} __attribute__((packed));

/*
 * Data structure for the response from UST to the session daemon.
 * cmd_type is sent back in the reply for validation.
 */
#define USTCOMM_REPLY_PADDING1		32
#define USTCOMM_REPLY_PADDING2		32
struct ustcomm_ust_reply {
	uint32_t handle;
	uint32_t cmd;
	int32_t ret_code;	/* enum ustcomm_return_code */
	uint32_t ret_val;	/* return value */
	char padding[USTCOMM_REPLY_PADDING1];
	union {
		struct {
			uint64_t memory_map_size;
		} __attribute__((packed)) channel;
		struct {
			uint64_t memory_map_size;
		} __attribute__((packed)) stream;
		struct lttng_ust_abi_tracer_version version;
		struct lttng_ust_abi_tracepoint_iter tracepoint;
		char padding[USTCOMM_REPLY_PADDING2];
	} u;
} __attribute__((packed));

struct ustcomm_notify_hdr {
	uint32_t notify_cmd;
} __attribute__((packed));

#define USTCOMM_NOTIFY_EVENT_MSG_PADDING	24
struct ustcomm_notify_event_msg {
	uint32_t session_objd;
	uint32_t channel_objd;
	char event_name[LTTNG_UST_ABI_SYM_NAME_LEN];
	int32_t loglevel;
	uint32_t signature_len;
	uint32_t fields_len;
	uint32_t model_emf_uri_len;
	uint64_t user_token;
	char padding[USTCOMM_NOTIFY_EVENT_MSG_PADDING];
	/* followed by signature, fields, and model_emf_uri */
} __attribute__((packed));

#define USTCOMM_NOTIFY_EVENT_REPLY_PADDING	32
struct ustcomm_notify_event_reply {
	int32_t ret_code;	/* 0: ok, negative: error code */
	uint32_t id;	/* 32-bit event id. */
	char padding[USTCOMM_NOTIFY_EVENT_REPLY_PADDING];
} __attribute__((packed));

#define USTCOMM_NOTIFY_KEY_MSG_PADDING	24
struct ustcomm_notify_key_msg {
	uint32_t session_objd;
	uint32_t map_objd;
	uint32_t dimension;
	uint32_t key_string_len;
	uint64_t user_token;
	char padding[USTCOMM_NOTIFY_KEY_MSG_PADDING];
	/* followed by dimension_indexes (array of @dimension uint64_t items) and key_string. */
} __attribute__((packed));

#define USTCOMM_NOTIFY_KEY_REPLY_PADDING	32
struct ustcomm_notify_key_reply {
	int32_t ret_code;	/* 0: ok, negative: error code */
	uint64_t index;		/* 64-bit key index. */
	char padding[USTCOMM_NOTIFY_KEY_REPLY_PADDING];
} __attribute__((packed));

#define USTCOMM_NOTIFY_ENUM_MSG_PADDING		32
struct ustcomm_notify_enum_msg {
	uint32_t session_objd;
	char enum_name[LTTNG_UST_ABI_SYM_NAME_LEN];
	uint32_t entries_len;
	char padding[USTCOMM_NOTIFY_ENUM_MSG_PADDING];
	/* followed by enum entries */
} __attribute__((packed));

#define USTCOMM_NOTIFY_ENUM_REPLY_PADDING	32
struct ustcomm_notify_enum_reply {
	int32_t ret_code;	/* 0: ok, negative: error code */
	uint64_t enum_id;
	char padding[USTCOMM_NOTIFY_ENUM_REPLY_PADDING];
} __attribute__((packed));

#define USTCOMM_NOTIFY_CHANNEL_MSG_PADDING	32
struct ustcomm_notify_channel_msg {
	uint32_t session_objd;
	uint32_t channel_objd;
	uint32_t ctx_fields_len;
	char padding[USTCOMM_NOTIFY_CHANNEL_MSG_PADDING];
	/* followed by context fields */
} __attribute__((packed));

#define USTCOMM_NOTIFY_CHANNEL_REPLY_PADDING	32
struct ustcomm_notify_channel_reply {
	int32_t ret_code;	/* 0: ok, negative: error code */
	uint32_t chan_id;
	uint32_t header_type;	/* enum lttng_ust_ctl_channel_header */
	char padding[USTCOMM_NOTIFY_CHANNEL_REPLY_PADDING];
} __attribute__((packed));

/*
 * LTTNG_UST_TRACEPOINT_FIELD_LIST reply is followed by a
 * struct lttng_ust_field_iter field.
 */

int ustcomm_create_unix_sock(const char *pathname)
	__attribute__((visibility("hidden")));

int ustcomm_connect_unix_sock(const char *pathname,
	long timeout)
	__attribute__((visibility("hidden")));

int ustcomm_accept_unix_sock(int sock)
	__attribute__((visibility("hidden")));

int ustcomm_listen_unix_sock(int sock)
	__attribute__((visibility("hidden")));

int ustcomm_shutdown_unix_sock(int sock)
	__attribute__((visibility("hidden")));

int ustcomm_close_unix_sock(int sock)
	__attribute__((visibility("hidden")));

ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len)
	__attribute__((visibility("hidden")));

ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len)
	__attribute__((visibility("hidden")));

ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd)
	__attribute__((visibility("hidden")));

ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd)
	__attribute__((visibility("hidden")));

const char *ustcomm_get_readable_code(int code)
	__attribute__((visibility("hidden")));

int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum)
	__attribute__((visibility("hidden")));

int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur,
	uint32_t expected_handle, uint32_t expected_cmd)
	__attribute__((visibility("hidden")));

int ustcomm_send_app_cmd(int sock,
		struct ustcomm_ust_msg *lum,
		struct ustcomm_ust_reply *lur)
	__attribute__((visibility("hidden")));

int ustcomm_recv_fd(int sock)
	__attribute__((visibility("hidden")));

ssize_t ustcomm_recv_channel_from_sessiond(int sock,
		void **chan_data, uint64_t len, int *wakeup_fd)
	__attribute__((visibility("hidden")));

int ustcomm_recv_stream_from_sessiond(int sock,
		uint64_t *memory_map_size,
		int *shm_fd, int *wakeup_fd)
	__attribute__((visibility("hidden")));

ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock,
		int *event_notifier_notif_fd)
	__attribute__((visibility("hidden")));

ssize_t ustcomm_recv_var_len_cmd_from_sessiond(int sock,
		void **data, uint32_t len)
	__attribute__((visibility("hidden")));

int ustcomm_recv_counter_shm_from_sessiond(int sock,
		int *shm_fd)
	__attribute__((visibility("hidden")));

/*
 * Returns 0 on success, negative error value on error.
 * Returns -EPIPE or -ECONNRESET if other end has hung up.
 */
int ustcomm_send_reg_msg(int sock,
		enum lttng_ust_ctl_socket_type type,
		uint32_t bits_per_long,
		uint32_t uint8_t_alignment,
		uint32_t uint16_t_alignment,
		uint32_t uint32_t_alignment,
		uint32_t uint64_t_alignment,
		uint32_t long_alignment,
		const char *procname)
	__attribute__((visibility("hidden")));

/*
 * Returns 0 on success, negative error value on error.
 * Returns -EPIPE or -ECONNRESET if other end has hung up.
 */
int ustcomm_register_event(int sock,
	struct lttng_ust_session *session,
	int session_objd,		/* session descriptor */
	int channel_objd,		/* channel descriptor */
	const char *event_name,		/* event name (input) */
	int loglevel,
	const char *signature,		/* event signature (input) */
	size_t nr_fields,		/* fields */
	const struct lttng_ust_event_field * const *fields,
	const char *model_emf_uri,
	uint64_t user_token,
	uint32_t *id)			/* (output) */
	__attribute__((visibility("hidden")));

/*
 * Returns 0 on success, negative error value on error.
 * Returns -EPIPE or -ECONNRESET if other end has hung up.
 */
int ustcomm_register_key(int sock,
	int session_objd,		/* session descriptor */
	int map_objd,			/* map descriptor */
	uint32_t dimension,
	const uint64_t *dimension_indexes,
	const char *key_string,		/* key string (input) */
	uint64_t user_token,
	uint64_t *index)		/* (output) */
	__attribute__((visibility("hidden")));

/*
 * Returns 0 on success, negative error value on error.
 * Returns -EPIPE or -ECONNRESET if other end has hung up.
 */
int ustcomm_register_enum(int sock,
	int session_objd,		/* session descriptor */
	const char *enum_name,		/* enum name (input) */
	size_t nr_entries,		/* entries */
	const struct lttng_ust_enum_entry * const *entries,
	uint64_t *id)			/* enum id (output) */
	__attribute__((visibility("hidden")));

/*
 * Returns 0 on success, negative error value on error.
 * Returns -EPIPE or -ECONNRESET if other end has hung up.
 */
int ustcomm_register_channel(int sock,
	struct lttng_ust_session *session,
	int session_objd,		/* session descriptor */
	int channel_objd,		/* channel descriptor */
	size_t nr_ctx_fields,
	struct lttng_ust_ctx_field *ctx_fields,
	uint32_t *chan_id,		/* channel id (output) */
	int *header_type) 		/* header type (output) */
	__attribute__((visibility("hidden")));

int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec)
	__attribute__((visibility("hidden")));

int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec)
	__attribute__((visibility("hidden")));

#endif	/* _UST_COMMON_UST_COMM_H */
Commit	Line	Data
	1	/*
	2	* SPDX-License-Identifier: LGPL-2.1-only
	3	*
	4	* Copyright (C) 2011 EfficiOS Inc.
	5	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	6	*/
	7
	8	/*
	9	* This header is meant for liblttng and libust internal use ONLY.
	10	* These declarations should NOT be considered stable API.
	11	*/
	12
	13	#ifndef _UST_COMMON_UST_COMM_H
	14	#define _UST_COMMON_UST_COMM_H
	15
	16	#include <stdint.h>
	17	#include <limits.h>
	18	#include <unistd.h>
	19	#include <lttng/ust-abi.h>
	20	#include <lttng/ust-abi-old.h>
	21	#include <lttng/ust-error.h>
	22	#include <lttng/ust-compiler.h>
	23	#include <lttng/ust-ctl.h>
	24
	25	/*
	26	* Default timeout the application waits for the sessiond to send its
	27	* "register done" command. Can be overridden with the environment
	28	* variable "LTTNG_UST_REGISTER_TIMEOUT". Note that if the sessiond is not
	29	* found, the application proceeds directly without any delay.
	30	*/
	31	#define LTTNG_UST_DEFAULT_CONSTRUCTOR_TIMEOUT_MS 3000
	32
	33	#define LTTNG_DEFAULT_RUNDIR LTTNG_SYSTEM_RUNDIR
	34	#define LTTNG_DEFAULT_HOME_RUNDIR ".lttng"
	35
	36	/* Queue size of listen(2) */
	37	#define LTTNG_UST_COMM_MAX_LISTEN 10
	38	#define LTTNG_UST_COMM_REG_MSG_PADDING 64
	39
	40	struct lttng_ust_event_field;
	41	struct lttng_ust_ctx_field;
	42	struct lttng_ust_enum_entry;
	43	struct lttng_integer_type;
	44	struct lttng_ust_session;
	45
	46	struct lttng_ust_ctl_reg_msg {
	47	uint32_t magic;
	48	uint32_t major;
	49	uint32_t minor;
	50	uint32_t pid;
	51	uint32_t ppid;
	52	uint32_t uid;
	53	uint32_t gid;
	54	uint32_t bits_per_long;
	55	uint32_t uint8_t_alignment;
	56	uint32_t uint16_t_alignment;
	57	uint32_t uint32_t_alignment;
	58	uint32_t uint64_t_alignment;
	59	uint32_t long_alignment;
	60	uint32_t socket_type; /* enum lttng_ust_ctl_socket_type */
	61	char name[LTTNG_UST_ABI_PROCNAME_LEN]; /* process name */
	62	char padding[LTTNG_UST_COMM_REG_MSG_PADDING];
	63	} __attribute__((packed));
	64
	65	/*
	66	* Data structure for the commands sent from sessiond to UST.
	67	*/
	68	#define USTCOMM_MSG_PADDING1 32
	69	#define USTCOMM_MSG_PADDING2 32
	70	struct ustcomm_ust_msg {
	71	uint32_t handle;
	72	uint32_t cmd;
	73	char padding[USTCOMM_MSG_PADDING1];
	74	union {
	75	struct lttng_ust_abi_channel channel;
	76	struct lttng_ust_abi_stream stream;
	77	struct lttng_ust_abi_event event;
	78	struct lttng_ust_abi_context context;
	79	struct lttng_ust_abi_tracer_version version;
	80	struct lttng_ust_abi_tracepoint_iter tracepoint;
	81	struct {
	82	uint32_t data_size; /* following filter data */
	83	uint32_t reloc_offset;
	84	uint64_t seqnum;
	85	} __attribute__((packed)) filter;
	86	struct {
	87	uint32_t count; /* how many names follow */
	88	} __attribute__((packed)) exclusion;
	89	struct {
	90	uint32_t data_size; /* following capture data */
	91	uint32_t reloc_offset;
	92	uint64_t seqnum;
	93	} __attribute__((packed)) capture;
	94	struct lttng_ust_abi_old_counter counter_old;
	95	struct lttng_ust_abi_old_counter_global counter_global_old;
	96	struct lttng_ust_abi_old_counter_cpu counter_cpu_old;
	97	struct {
	98	uint32_t cmd_len;
	99	} __attribute__((packed)) var_len_cmd;
	100	char padding[USTCOMM_MSG_PADDING2];
	101	} u;
	102	} __attribute__((packed));
	103
	104	/*
	105	* Data structure for the response from UST to the session daemon.
	106	* cmd_type is sent back in the reply for validation.
	107	*/
	108	#define USTCOMM_REPLY_PADDING1 32
	109	#define USTCOMM_REPLY_PADDING2 32
	110	struct ustcomm_ust_reply {
	111	uint32_t handle;
	112	uint32_t cmd;
	113	int32_t ret_code; /* enum ustcomm_return_code */
	114	uint32_t ret_val; /* return value */
	115	char padding[USTCOMM_REPLY_PADDING1];
	116	union {
	117	struct {
	118	uint64_t memory_map_size;
	119	} __attribute__((packed)) channel;
	120	struct {
	121	uint64_t memory_map_size;
	122	} __attribute__((packed)) stream;
	123	struct lttng_ust_abi_tracer_version version;
	124	struct lttng_ust_abi_tracepoint_iter tracepoint;
	125	char padding[USTCOMM_REPLY_PADDING2];
	126	} u;
	127	} __attribute__((packed));
	128
	129	struct ustcomm_notify_hdr {
	130	uint32_t notify_cmd;
	131	} __attribute__((packed));
	132
	133	#define USTCOMM_NOTIFY_EVENT_MSG_PADDING 24
	134	struct ustcomm_notify_event_msg {
	135	uint32_t session_objd;
	136	uint32_t channel_objd;
	137	char event_name[LTTNG_UST_ABI_SYM_NAME_LEN];
	138	int32_t loglevel;
	139	uint32_t signature_len;
	140	uint32_t fields_len;
	141	uint32_t model_emf_uri_len;
	142	uint64_t user_token;
	143	char padding[USTCOMM_NOTIFY_EVENT_MSG_PADDING];
	144	/* followed by signature, fields, and model_emf_uri */
	145	} __attribute__((packed));
	146
	147	#define USTCOMM_NOTIFY_EVENT_REPLY_PADDING 32
	148	struct ustcomm_notify_event_reply {
	149	int32_t ret_code; /* 0: ok, negative: error code */
	150	uint32_t id; /* 32-bit event id. */
	151	char padding[USTCOMM_NOTIFY_EVENT_REPLY_PADDING];
	152	} __attribute__((packed));
	153
	154	#define USTCOMM_NOTIFY_KEY_MSG_PADDING 24
	155	struct ustcomm_notify_key_msg {
	156	uint32_t session_objd;
	157	uint32_t map_objd;
	158	uint32_t dimension;
	159	uint32_t key_string_len;
	160	uint64_t user_token;
	161	char padding[USTCOMM_NOTIFY_KEY_MSG_PADDING];
	162	/* followed by dimension_indexes (array of @dimension uint64_t items) and key_string. */
	163	} __attribute__((packed));
	164
	165	#define USTCOMM_NOTIFY_KEY_REPLY_PADDING 32
	166	struct ustcomm_notify_key_reply {
	167	int32_t ret_code; /* 0: ok, negative: error code */
	168	uint64_t index; /* 64-bit key index. */
	169	char padding[USTCOMM_NOTIFY_KEY_REPLY_PADDING];
	170	} __attribute__((packed));
	171
	172	#define USTCOMM_NOTIFY_ENUM_MSG_PADDING 32
	173	struct ustcomm_notify_enum_msg {
	174	uint32_t session_objd;
	175	char enum_name[LTTNG_UST_ABI_SYM_NAME_LEN];
	176	uint32_t entries_len;
	177	char padding[USTCOMM_NOTIFY_ENUM_MSG_PADDING];
	178	/* followed by enum entries */
	179	} __attribute__((packed));
	180
	181	#define USTCOMM_NOTIFY_ENUM_REPLY_PADDING 32
	182	struct ustcomm_notify_enum_reply {
	183	int32_t ret_code; /* 0: ok, negative: error code */
	184	uint64_t enum_id;
	185	char padding[USTCOMM_NOTIFY_ENUM_REPLY_PADDING];
	186	} __attribute__((packed));
	187
	188	#define USTCOMM_NOTIFY_CHANNEL_MSG_PADDING 32
	189	struct ustcomm_notify_channel_msg {
	190	uint32_t session_objd;
	191	uint32_t channel_objd;
	192	uint32_t ctx_fields_len;
	193	char padding[USTCOMM_NOTIFY_CHANNEL_MSG_PADDING];
	194	/* followed by context fields */
	195	} __attribute__((packed));
	196
	197	#define USTCOMM_NOTIFY_CHANNEL_REPLY_PADDING 32
	198	struct ustcomm_notify_channel_reply {
	199	int32_t ret_code; /* 0: ok, negative: error code */
	200	uint32_t chan_id;
	201	uint32_t header_type; /* enum lttng_ust_ctl_channel_header */
	202	char padding[USTCOMM_NOTIFY_CHANNEL_REPLY_PADDING];
	203	} __attribute__((packed));
	204
	205	/*
	206	* LTTNG_UST_TRACEPOINT_FIELD_LIST reply is followed by a
	207	* struct lttng_ust_field_iter field.
	208	*/
	209
	210	int ustcomm_create_unix_sock(const char *pathname)
	211	__attribute__((visibility("hidden")));
	212
	213	int ustcomm_connect_unix_sock(const char *pathname,
	214	long timeout)
	215	__attribute__((visibility("hidden")));
	216
	217	int ustcomm_accept_unix_sock(int sock)
	218	__attribute__((visibility("hidden")));
	219
	220	int ustcomm_listen_unix_sock(int sock)
	221	__attribute__((visibility("hidden")));
	222
	223	int ustcomm_shutdown_unix_sock(int sock)
	224	__attribute__((visibility("hidden")));
	225
	226	int ustcomm_close_unix_sock(int sock)
	227	__attribute__((visibility("hidden")));
	228
	229	ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len)
	230	__attribute__((visibility("hidden")));
	231
	232	ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len)
	233	__attribute__((visibility("hidden")));
	234
	235	ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd)
	236	__attribute__((visibility("hidden")));
	237
	238	ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd)
	239	__attribute__((visibility("hidden")));
	240
	241	const char *ustcomm_get_readable_code(int code)
	242	__attribute__((visibility("hidden")));
	243
	244	int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum)
	245	__attribute__((visibility("hidden")));
	246
	247	int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur,
	248	uint32_t expected_handle, uint32_t expected_cmd)
	249	__attribute__((visibility("hidden")));
	250
	251	int ustcomm_send_app_cmd(int sock,
	252	struct ustcomm_ust_msg *lum,
	253	struct ustcomm_ust_reply *lur)
	254	__attribute__((visibility("hidden")));
	255
	256	int ustcomm_recv_fd(int sock)
	257	__attribute__((visibility("hidden")));
	258
	259	ssize_t ustcomm_recv_channel_from_sessiond(int sock,
	260	void *chan_data, uint64_t len, int wakeup_fd)
	261	__attribute__((visibility("hidden")));
	262
	263	int ustcomm_recv_stream_from_sessiond(int sock,
	264	uint64_t *memory_map_size,
	265	int shm_fd, int wakeup_fd)
	266	__attribute__((visibility("hidden")));
	267
	268	ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock,
	269	int *event_notifier_notif_fd)
	270	__attribute__((visibility("hidden")));
	271
	272	ssize_t ustcomm_recv_var_len_cmd_from_sessiond(int sock,
	273	void **data, uint32_t len)
	274	__attribute__((visibility("hidden")));
	275
	276	int ustcomm_recv_counter_shm_from_sessiond(int sock,
	277	int *shm_fd)
	278	__attribute__((visibility("hidden")));
	279
	280	/*
	281	* Returns 0 on success, negative error value on error.
	282	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	283	*/
	284	int ustcomm_send_reg_msg(int sock,
	285	enum lttng_ust_ctl_socket_type type,
	286	uint32_t bits_per_long,
	287	uint32_t uint8_t_alignment,
	288	uint32_t uint16_t_alignment,
	289	uint32_t uint32_t_alignment,
	290	uint32_t uint64_t_alignment,
	291	uint32_t long_alignment,
	292	const char *procname)
	293	__attribute__((visibility("hidden")));
	294
	295	/*
	296	* Returns 0 on success, negative error value on error.
	297	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	298	*/
	299	int ustcomm_register_event(int sock,
	300	struct lttng_ust_session *session,
	301	int session_objd, /* session descriptor */
	302	int channel_objd, /* channel descriptor */
	303	const char event_name, / event name (input) */
	304	int loglevel,
	305	const char signature, / event signature (input) */
	306	size_t nr_fields, /* fields */
	307	const struct lttng_ust_event_field * const *fields,
	308	const char *model_emf_uri,
	309	uint64_t user_token,
	310	uint32_t id) / (output) */
	311	__attribute__((visibility("hidden")));
	312
	313	/*
	314	* Returns 0 on success, negative error value on error.
	315	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	316	*/
	317	int ustcomm_register_key(int sock,
	318	int session_objd, /* session descriptor */
	319	int map_objd, /* map descriptor */
	320	uint32_t dimension,
	321	const uint64_t *dimension_indexes,
	322	const char key_string, / key string (input) */
	323	uint64_t user_token,
	324	uint64_t index) / (output) */
	325	__attribute__((visibility("hidden")));
	326
	327	/*
	328	* Returns 0 on success, negative error value on error.
	329	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	330	*/
	331	int ustcomm_register_enum(int sock,
	332	int session_objd, /* session descriptor */
	333	const char enum_name, / enum name (input) */
	334	size_t nr_entries, /* entries */
	335	const struct lttng_ust_enum_entry * const *entries,
	336	uint64_t id) / enum id (output) */
	337	__attribute__((visibility("hidden")));
	338
	339	/*
	340	* Returns 0 on success, negative error value on error.
	341	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	342	*/
	343	int ustcomm_register_channel(int sock,
	344	struct lttng_ust_session *session,
	345	int session_objd, /* session descriptor */
	346	int channel_objd, /* channel descriptor */
	347	size_t nr_ctx_fields,
	348	struct lttng_ust_ctx_field *ctx_fields,
	349	uint32_t chan_id, / channel id (output) */
	350	int header_type) / header type (output) */
	351	__attribute__((visibility("hidden")));
	352
	353	int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec)
	354	__attribute__((visibility("hidden")));
	355
	356	int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec)
	357	__attribute__((visibility("hidden")));
	358
	359	#endif /* _UST_COMMON_UST_COMM_H */