[lttng-ust.git] / include / ust-comm.h

/*
 * SPDX-License-Identifier: LGPL-2.1-only
 *
 * Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
 * Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
 * 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 _LTTNG_UST_COMM_H
#define _LTTNG_UST_COMM_H

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

#ifndef LTTNG_PACKED
#error "LTTNG_PACKED should be defined"
#endif

/*
 * 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	CONFIG_LTTNG_UST_DEFAULT_CONSTRUCTOR_TIMEOUT_MS

#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_event_field;
struct lttng_ctx_field;
struct lttng_enum_entry;
struct lttng_integer_type;
struct lttng_session;

struct ustctl_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 ustctl_socket_type */
	char name[LTTNG_UST_ABI_PROCNAME_LEN];	/* process name */
	char padding[LTTNG_UST_COMM_REG_MSG_PADDING];
} LTTNG_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_channel channel;
		struct lttng_ust_stream stream;
		struct lttng_ust_event event;
		struct lttng_ust_context context;
		struct lttng_ust_tracer_version version;
		struct lttng_ust_tracepoint_iter tracepoint;
		struct {
			uint32_t data_size;	/* following filter data */
			uint32_t reloc_offset;
			uint64_t seqnum;
		} LTTNG_PACKED filter;
		struct {
			uint32_t count;	/* how many names follow */
		} LTTNG_PACKED exclusion;
		struct {
			uint32_t data_size;	/* following capture data */
			uint32_t reloc_offset;
			uint64_t seqnum;
		} LTTNG_PACKED capture;
		struct lttng_ust_counter counter;
		struct lttng_ust_counter_global counter_global;
		struct lttng_ust_counter_cpu counter_cpu;
		/*
		 * For LTTNG_UST_EVENT_NOTIFIER_CREATE, a struct
		 * lttng_ust_event_notifier implicitly follows struct
		 * ustcomm_ust_msg.
		 */
		struct {
			/* Length of struct lttng_ust_event_notifier */
			uint32_t len;
		} event_notifier;
		char padding[USTCOMM_MSG_PADDING2];
	} u;
} LTTNG_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;
		} LTTNG_PACKED channel;
		struct {
			uint64_t memory_map_size;
		} LTTNG_PACKED stream;
		struct lttng_ust_tracer_version version;
		struct lttng_ust_tracepoint_iter tracepoint;
		char padding[USTCOMM_REPLY_PADDING2];
	} u;
} LTTNG_PACKED;

struct ustcomm_notify_hdr {
	uint32_t notify_cmd;
} LTTNG_PACKED;

#define USTCOMM_NOTIFY_EVENT_MSG_PADDING	32
struct ustcomm_notify_event_msg {
	uint32_t session_objd;
	uint32_t channel_objd;
	char event_name[LTTNG_UST_SYM_NAME_LEN];
	int32_t loglevel;
	uint32_t signature_len;
	uint32_t fields_len;
	uint32_t model_emf_uri_len;
	char padding[USTCOMM_NOTIFY_EVENT_MSG_PADDING];
	/* followed by signature, fields, and model_emf_uri */
} LTTNG_PACKED;

#define USTCOMM_NOTIFY_EVENT_REPLY_PADDING	32
struct ustcomm_notify_event_reply {
	int32_t ret_code;	/* 0: ok, negative: error code */
	uint32_t event_id;
	char padding[USTCOMM_NOTIFY_EVENT_REPLY_PADDING];
} LTTNG_PACKED;

#define USTCOMM_NOTIFY_ENUM_MSG_PADDING		32
struct ustcomm_notify_enum_msg {
	uint32_t session_objd;
	char enum_name[LTTNG_UST_SYM_NAME_LEN];
	uint32_t entries_len;
	char padding[USTCOMM_NOTIFY_ENUM_MSG_PADDING];
	/* followed by enum entries */
} LTTNG_PACKED;

#define USTCOMM_NOTIFY_EVENT_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_EVENT_REPLY_PADDING];
} LTTNG_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 */
} LTTNG_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 ustctl_channel_header */
	char padding[USTCOMM_NOTIFY_CHANNEL_REPLY_PADDING];
} LTTNG_PACKED;

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

extern int ustcomm_create_unix_sock(const char *pathname);
extern int ustcomm_connect_unix_sock(const char *pathname,
		long timeout);
extern int ustcomm_accept_unix_sock(int sock);
extern int ustcomm_listen_unix_sock(int sock);
extern int ustcomm_close_unix_sock(int sock);

extern ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len);
extern ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len);
extern ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd);
extern ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd);

extern const char *ustcomm_get_readable_code(int code);
extern int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum);
extern int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur,
		uint32_t expected_handle, uint32_t expected_cmd);
extern int ustcomm_send_app_cmd(int sock,
		struct ustcomm_ust_msg *lum,
		struct ustcomm_ust_reply *lur);
int ustcomm_recv_fd(int sock);

ssize_t ustcomm_recv_channel_from_sessiond(int sock,
		void **chan_data, uint64_t len, int *wakeup_fd);
int ustcomm_recv_stream_from_sessiond(int sock,
		uint64_t *memory_map_size,
		int *shm_fd, int *wakeup_fd);
LTTNG_HIDDEN
ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock,
		int *event_notifier_notif_fd);

LTTNG_HIDDEN
ssize_t ustcomm_recv_counter_from_sessiond(int sock,
		void **counter_data, uint64_t len);
LTTNG_HIDDEN
int ustcomm_recv_counter_shm_from_sessiond(int sock,
		int *shm_fd);

/*
 * 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 ustctl_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);

/*
 * 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_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_event_field *fields,
	const char *model_emf_uri,
	uint32_t *id);			/* event id (output) */

/*
 * 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_enum_entry *entries,
	uint64_t *id);			/* enum id (output) */

/*
 * 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_session *session,
	int session_objd,		/* session descriptor */
	int channel_objd,		/* channel descriptor */
	size_t nr_ctx_fields,
	const struct lttng_ctx_field *ctx_fields,
	uint32_t *chan_id,		/* channel id (output) */
	int *header_type); 		/* header type (output) */

int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec);

#endif	/* _LTTNG_UST_COMM_H */
Commit	Line	Data
67c5b804	1	/*
c0c0989a	2	* SPDX-License-Identifier: LGPL-2.1-only
15f672f9	3	*
c0c0989a MJ	4	* Copyright (C) 2011 David Goulet <david.goulet@polymtl.ca>
	5	* Copyright (C) 2011 Julien Desfossez <julien.desfossez@polymtl.ca>
	6	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
67c5b804 MD	7	*/
	8
	9	/*
	10	* This header is meant for liblttng and libust internal use ONLY.
	11	* These declarations should NOT be considered stable API.
	12	*/
	13
c0c0989a MJ	14	#ifndef _LTTNG_UST_COMM_H
	15	#define _LTTNG_UST_COMM_H
	16
fb31eb73	17	#include <stdint.h>
67c5b804	18	#include <limits.h>
57773204	19	#include <unistd.h>
4318ae1b	20	#include <lttng/ust-abi.h>
7bc53e94	21	#include <lttng/ust-error.h>
b3f60bbf	22	#include <lttng/ust-compiler.h>
c785c634	23	#include <lttng/ust-ctl.h>
76644b7e	24	#include "helper.h"
67c5b804	25
db56acaf MD	26	#ifndef LTTNG_PACKED
	27	#error "LTTNG_PACKED should be defined"
	28	#endif
	29
11ff9c7d	30	/*
cf12a773 MD	31	* Default timeout the application waits for the sessiond to send its
cf12a773 MD	32	* "register done" command. Can be overridden with the environment
69400ac4	33	* variable "LTTNG_UST_REGISTER_TIMEOUT". Note that if the sessiond is not
cf12a773	34	* found, the application proceeds directly without any delay.
11ff9c7d	35	*/
2b4444ce	36	#define LTTNG_UST_DEFAULT_CONSTRUCTOR_TIMEOUT_MS CONFIG_LTTNG_UST_DEFAULT_CONSTRUCTOR_TIMEOUT_MS
11ff9c7d	37
751d4e91	38	#define LTTNG_DEFAULT_RUNDIR LTTNG_SYSTEM_RUNDIR
32ce8569	39	#define LTTNG_DEFAULT_HOME_RUNDIR ".lttng"
7fc90dca	40
67c5b804	41	/* Queue size of listen(2) */
32ce8569 MD	42	#define LTTNG_UST_COMM_MAX_LISTEN 10
	43	#define LTTNG_UST_COMM_REG_MSG_PADDING 64
	44
	45	struct lttng_event_field;
83e43212	46	struct lttng_ctx_field;
c785c634 MD	47	struct lttng_enum_entry;
	48	struct lttng_integer_type;
	49	struct lttng_session;
32ce8569 MD	50
	51	struct ustctl_reg_msg {
	52	uint32_t magic;
	53	uint32_t major;
	54	uint32_t minor;
	55	uint32_t pid;
	56	uint32_t ppid;
	57	uint32_t uid;
	58	uint32_t gid;
	59	uint32_t bits_per_long;
	60	uint32_t uint8_t_alignment;
	61	uint32_t uint16_t_alignment;
	62	uint32_t uint32_t_alignment;
	63	uint32_t uint64_t_alignment;
	64	uint32_t long_alignment;
	65	uint32_t socket_type; /* enum ustctl_socket_type */
	66	char name[LTTNG_UST_ABI_PROCNAME_LEN]; /* process name */
	67	char padding[LTTNG_UST_COMM_REG_MSG_PADDING];
	68	} LTTNG_PACKED;
67c5b804	69
67c5b804	70	/*
e7723462	71	* Data structure for the commands sent from sessiond to UST.
67c5b804	72	*/
32ce8569 MD	73	#define USTCOMM_MSG_PADDING1 32
32ce8569 MD	74	#define USTCOMM_MSG_PADDING2 32
57773204	75	struct ustcomm_ust_msg {
1ece9766	76	uint32_t handle;
46050b1a	77	uint32_t cmd;
32ce8569	78	char padding[USTCOMM_MSG_PADDING1];
67c5b804	79	union {
1ece9766	80	struct lttng_ust_channel channel;
381c0f1e	81	struct lttng_ust_stream stream;
1ece9766 MD	82	struct lttng_ust_event event;
1ece9766 MD	83	struct lttng_ust_context context;
57773204	84	struct lttng_ust_tracer_version version;
cbef6901	85	struct lttng_ust_tracepoint_iter tracepoint;
2d78951a	86	struct {
2734ca65 CB	87	uint32_t data_size; /* following filter data */
2734ca65 CB	88	uint32_t reloc_offset;
3f6fd224	89	uint64_t seqnum;
b3f60bbf	90	} LTTNG_PACKED filter;
75582b3a JI	91	struct {
	92	uint32_t count; /* how many names follow */
	93	} LTTNG_PACKED exclusion;
d37ecb3f FD	94	struct {
	95	uint32_t data_size; /* following capture data */
	96	uint32_t reloc_offset;
	97	uint64_t seqnum;
	98	} LTTNG_PACKED capture;
ebabbf58 MD	99	struct lttng_ust_counter counter;
	100	struct lttng_ust_counter_global counter_global;
	101	struct lttng_ust_counter_cpu counter_cpu;
8406222c MD	102	/*
	103	* For LTTNG_UST_EVENT_NOTIFIER_CREATE, a struct
	104	* lttng_ust_event_notifier implicitly follows struct
	105	* ustcomm_ust_msg.
	106	*/
	107	struct {
	108	/* Length of struct lttng_ust_event_notifier */
	109	uint32_t len;
	110	} event_notifier;
32ce8569	111	char padding[USTCOMM_MSG_PADDING2];
67c5b804	112	} u;
b3f60bbf	113	} LTTNG_PACKED;
67c5b804	114
9eb62b9c MD	115	/*
	116	* Data structure for the response from UST to the session daemon.
	117	* cmd_type is sent back in the reply for validation.
	118	*/
32ce8569 MD	119	#define USTCOMM_REPLY_PADDING1 32
32ce8569 MD	120	#define USTCOMM_REPLY_PADDING2 32
57773204	121	struct ustcomm_ust_reply {
46050b1a MD	122	uint32_t handle;
46050b1a MD	123	uint32_t cmd;
7f2348b8	124	int32_t ret_code; /* enum ustcomm_return_code */
1ece9766	125	uint32_t ret_val; /* return value */
32ce8569	126	char padding[USTCOMM_REPLY_PADDING1];
9eb62b9c	127	union {
193183fb MD	128	struct {
193183fb MD	129	uint64_t memory_map_size;
b3f60bbf	130	} LTTNG_PACKED channel;
381c0f1e MD	131	struct {
381c0f1e MD	132	uint64_t memory_map_size;
b3f60bbf	133	} LTTNG_PACKED stream;
57773204	134	struct lttng_ust_tracer_version version;
cbef6901	135	struct lttng_ust_tracepoint_iter tracepoint;
32ce8569	136	char padding[USTCOMM_REPLY_PADDING2];
9eb62b9c	137	} u;
b3f60bbf	138	} LTTNG_PACKED;
9eb62b9c	139
32ce8569 MD	140	struct ustcomm_notify_hdr {
	141	uint32_t notify_cmd;
	142	} LTTNG_PACKED;
	143
	144	#define USTCOMM_NOTIFY_EVENT_MSG_PADDING 32
	145	struct ustcomm_notify_event_msg {
	146	uint32_t session_objd;
	147	uint32_t channel_objd;
	148	char event_name[LTTNG_UST_SYM_NAME_LEN];
	149	int32_t loglevel;
	150	uint32_t signature_len;
	151	uint32_t fields_len;
	152	uint32_t model_emf_uri_len;
	153	char padding[USTCOMM_NOTIFY_EVENT_MSG_PADDING];
	154	/* followed by signature, fields, and model_emf_uri */
	155	} LTTNG_PACKED;
	156
	157	#define USTCOMM_NOTIFY_EVENT_REPLY_PADDING 32
	158	struct ustcomm_notify_event_reply {
	159	int32_t ret_code; /* 0: ok, negative: error code */
	160	uint32_t event_id;
	161	char padding[USTCOMM_NOTIFY_EVENT_REPLY_PADDING];
	162	} LTTNG_PACKED;
	163
c785c634 MD	164	#define USTCOMM_NOTIFY_ENUM_MSG_PADDING 32
	165	struct ustcomm_notify_enum_msg {
	166	uint32_t session_objd;
	167	char enum_name[LTTNG_UST_SYM_NAME_LEN];
	168	uint32_t entries_len;
	169	char padding[USTCOMM_NOTIFY_ENUM_MSG_PADDING];
	170	/* followed by enum entries */
	171	} LTTNG_PACKED;
	172
	173	#define USTCOMM_NOTIFY_EVENT_REPLY_PADDING 32
	174	struct ustcomm_notify_enum_reply {
	175	int32_t ret_code; /* 0: ok, negative: error code */
	176	uint64_t enum_id;
	177	char padding[USTCOMM_NOTIFY_EVENT_REPLY_PADDING];
	178	} LTTNG_PACKED;
	179
32ce8569 MD	180	#define USTCOMM_NOTIFY_CHANNEL_MSG_PADDING 32
	181	struct ustcomm_notify_channel_msg {
	182	uint32_t session_objd;
	183	uint32_t channel_objd;
	184	uint32_t ctx_fields_len;
	185	char padding[USTCOMM_NOTIFY_CHANNEL_MSG_PADDING];
	186	/* followed by context fields */
	187	} LTTNG_PACKED;
	188
	189	#define USTCOMM_NOTIFY_CHANNEL_REPLY_PADDING 32
	190	struct ustcomm_notify_channel_reply {
	191	int32_t ret_code; /* 0: ok, negative: error code */
	192	uint32_t chan_id;
	193	uint32_t header_type; /* enum ustctl_channel_header */
	194	char padding[USTCOMM_NOTIFY_CHANNEL_REPLY_PADDING];
	195	} LTTNG_PACKED;
	196
40003310 MD	197	/*
	198	* LTTNG_UST_TRACEPOINT_FIELD_LIST reply is followed by a
	199	* struct lttng_ust_field_iter field.
	200	*/
	201
57773204	202	extern int ustcomm_create_unix_sock(const char *pathname);
451d66b2 MD	203	extern int ustcomm_connect_unix_sock(const char *pathname,
451d66b2 MD	204	long timeout);
57773204 MD	205	extern int ustcomm_accept_unix_sock(int sock);
	206	extern int ustcomm_listen_unix_sock(int sock);
	207	extern int ustcomm_close_unix_sock(int sock);
74d81a6c	208
57773204	209	extern ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len);
32ce8569	210	extern ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len);
74d81a6c MD	211	extern ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd);
	212	extern ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd);
	213
57773204 MD	214	extern const char *ustcomm_get_readable_code(int code);
	215	extern int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum);
	216	extern int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur,
	217	uint32_t expected_handle, uint32_t expected_cmd);
	218	extern int ustcomm_send_app_cmd(int sock,
	219	struct ustcomm_ust_msg *lum,
	220	struct ustcomm_ust_reply *lur);
	221	int ustcomm_recv_fd(int sock);
67c5b804	222
74d81a6c	223	ssize_t ustcomm_recv_channel_from_sessiond(int sock,
ff0f5728	224	void *chan_data, uint64_t len, int wakeup_fd);
74d81a6c MD	225	int ustcomm_recv_stream_from_sessiond(int sock,
	226	uint64_t *memory_map_size,
	227	int shm_fd, int wakeup_fd);
76644b7e	228	LTTNG_HIDDEN
d8d2416d FD	229	ssize_t ustcomm_recv_event_notifier_notif_fd_from_sessiond(int sock,
d8d2416d FD	230	int *event_notifier_notif_fd);
74d81a6c	231
76644b7e	232	LTTNG_HIDDEN
ebabbf58 MD	233	ssize_t ustcomm_recv_counter_from_sessiond(int sock,
ebabbf58 MD	234	void **counter_data, uint64_t len);
76644b7e	235	LTTNG_HIDDEN
ebabbf58 MD	236	int ustcomm_recv_counter_shm_from_sessiond(int sock,
	237	int *shm_fd);
	238
32ce8569 MD	239	/*
	240	* Returns 0 on success, negative error value on error.
	241	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	242	*/
	243	int ustcomm_send_reg_msg(int sock,
	244	enum ustctl_socket_type type,
	245	uint32_t bits_per_long,
	246	uint32_t uint8_t_alignment,
	247	uint32_t uint16_t_alignment,
	248	uint32_t uint32_t_alignment,
	249	uint32_t uint64_t_alignment,
	250	uint32_t long_alignment);
	251
	252	/*
	253	* Returns 0 on success, negative error value on error.
	254	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	255	*/
	256	int ustcomm_register_event(int sock,
c785c634	257	struct lttng_session *session,
32ce8569 MD	258	int session_objd, /* session descriptor */
	259	int channel_objd, /* channel descriptor */
	260	const char event_name, / event name (input) */
	261	int loglevel,
	262	const char signature, / event signature (input) */
	263	size_t nr_fields, /* fields */
	264	const struct lttng_event_field *fields,
	265	const char *model_emf_uri,
	266	uint32_t id); / event id (output) */
	267
c785c634 MD	268	/*
	269	* Returns 0 on success, negative error value on error.
	270	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	271	*/
	272	int ustcomm_register_enum(int sock,
	273	int session_objd, /* session descriptor */
	274	const char enum_name, / enum name (input) */
	275	size_t nr_entries, /* entries */
	276	const struct lttng_enum_entry *entries,
	277	uint64_t id); / enum id (output) */
	278
32ce8569 MD	279	/*
	280	* Returns 0 on success, negative error value on error.
	281	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	282	*/
	283	int ustcomm_register_channel(int sock,
53569322	284	struct lttng_session *session,
32ce8569 MD	285	int session_objd, /* session descriptor */
	286	int channel_objd, /* channel descriptor */
	287	size_t nr_ctx_fields,
83e43212	288	const struct lttng_ctx_field *ctx_fields,
32ce8569 MD	289	uint32_t chan_id, / channel id (output) */
	290	int header_type); / header type (output) */
	291
ff517991 MD	292	int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
	293	int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec);
	294
b35d179d	295	#endif /* _LTTNG_UST_COMM_H */