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

#ifndef _LTTNG_UST_COMM_H
#define _LTTNG_UST_COMM_H

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *                      Julien Desfossez <julien.desfossez@polymtl.ca>
 *                      Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; only
 * version 2.1 of the License.
 *
 * This library 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
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 */

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

#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 <config.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_trigger trigger;
		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;
		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);
ssize_t ustcomm_recv_trigger_notif_fd_from_sessiond(int sock,
		int *trigger_notif_fd);

ssize_t ustcomm_recv_counter_from_sessiond(int sock,
		void **counter_data, uint64_t len);
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
b35d179d MD	1	#ifndef _LTTNG_UST_COMM_H
b35d179d MD	2	#define _LTTNG_UST_COMM_H
67c5b804 MD	3
	4	/*
	5	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	6	* Julien Desfossez <julien.desfossez@polymtl.ca>
	7	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
15f672f9 MD	9	* This library is free software; you can redistribute it and/or
	10	* modify it under the terms of the GNU Lesser General Public
	11	* License as published by the Free Software Foundation; only
	12	* version 2.1 of the License.
	13	*
	14	* This library is distributed in the hope that it will be useful,
67c5b804	15	* but WITHOUT ANY WARRANTY; without even the implied warranty of
15f672f9 MD	16	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	17	* Lesser General Public License for more details.
	18	*
	19	* You should have received a copy of the GNU Lesser General Public
	20	* License along with this library; if not, write to the Free Software
	21	* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
67c5b804 MD	22	*/
	23
	24	/*
	25	* This header is meant for liblttng and libust internal use ONLY.
	26	* These declarations should NOT be considered stable API.
	27	*/
	28
fb31eb73	29	#include <stdint.h>
67c5b804	30	#include <limits.h>
57773204	31	#include <unistd.h>
4318ae1b	32	#include <lttng/ust-abi.h>
7bc53e94	33	#include <lttng/ust-error.h>
b3f60bbf	34	#include <lttng/ust-compiler.h>
c785c634	35	#include <lttng/ust-ctl.h>
751d4e91	36	#include <config.h>
67c5b804	37
db56acaf MD	38	#ifndef LTTNG_PACKED
	39	#error "LTTNG_PACKED should be defined"
	40	#endif
	41
11ff9c7d	42	/*
cf12a773 MD	43	* Default timeout the application waits for the sessiond to send its
cf12a773 MD	44	* "register done" command. Can be overridden with the environment
69400ac4	45	* variable "LTTNG_UST_REGISTER_TIMEOUT". Note that if the sessiond is not
cf12a773	46	* found, the application proceeds directly without any delay.
11ff9c7d	47	*/
2b4444ce	48	#define LTTNG_UST_DEFAULT_CONSTRUCTOR_TIMEOUT_MS CONFIG_LTTNG_UST_DEFAULT_CONSTRUCTOR_TIMEOUT_MS
11ff9c7d	49
751d4e91	50	#define LTTNG_DEFAULT_RUNDIR LTTNG_SYSTEM_RUNDIR
32ce8569	51	#define LTTNG_DEFAULT_HOME_RUNDIR ".lttng"
7fc90dca	52
67c5b804	53	/* Queue size of listen(2) */
32ce8569 MD	54	#define LTTNG_UST_COMM_MAX_LISTEN 10
	55	#define LTTNG_UST_COMM_REG_MSG_PADDING 64
	56
	57	struct lttng_event_field;
83e43212	58	struct lttng_ctx_field;
c785c634 MD	59	struct lttng_enum_entry;
	60	struct lttng_integer_type;
	61	struct lttng_session;
32ce8569 MD	62
	63	struct ustctl_reg_msg {
	64	uint32_t magic;
	65	uint32_t major;
	66	uint32_t minor;
	67	uint32_t pid;
	68	uint32_t ppid;
	69	uint32_t uid;
	70	uint32_t gid;
	71	uint32_t bits_per_long;
	72	uint32_t uint8_t_alignment;
	73	uint32_t uint16_t_alignment;
	74	uint32_t uint32_t_alignment;
	75	uint32_t uint64_t_alignment;
	76	uint32_t long_alignment;
	77	uint32_t socket_type; /* enum ustctl_socket_type */
	78	char name[LTTNG_UST_ABI_PROCNAME_LEN]; /* process name */
	79	char padding[LTTNG_UST_COMM_REG_MSG_PADDING];
	80	} LTTNG_PACKED;
67c5b804	81
67c5b804	82	/*
e7723462	83	* Data structure for the commands sent from sessiond to UST.
67c5b804	84	*/
32ce8569 MD	85	#define USTCOMM_MSG_PADDING1 32
32ce8569 MD	86	#define USTCOMM_MSG_PADDING2 32
57773204	87	struct ustcomm_ust_msg {
1ece9766	88	uint32_t handle;
46050b1a	89	uint32_t cmd;
32ce8569	90	char padding[USTCOMM_MSG_PADDING1];
67c5b804	91	union {
4e3b3630	92	struct lttng_ust_trigger trigger;
1ece9766	93	struct lttng_ust_channel channel;
381c0f1e	94	struct lttng_ust_stream stream;
1ece9766 MD	95	struct lttng_ust_event event;
1ece9766 MD	96	struct lttng_ust_context context;
57773204	97	struct lttng_ust_tracer_version version;
cbef6901	98	struct lttng_ust_tracepoint_iter tracepoint;
2d78951a	99	struct {
2734ca65 CB	100	uint32_t data_size; /* following filter data */
2734ca65 CB	101	uint32_t reloc_offset;
3f6fd224	102	uint64_t seqnum;
b3f60bbf	103	} LTTNG_PACKED filter;
75582b3a JI	104	struct {
	105	uint32_t count; /* how many names follow */
	106	} LTTNG_PACKED exclusion;
4e3b3630 JR	107	struct {
	108	uint32_t data_size; /* following capture data */
	109	uint32_t reloc_offset;
	110	uint64_t seqnum;
	111	} LTTNG_PACKED capture;
	112	struct lttng_ust_counter counter;
	113	struct lttng_ust_counter_global counter_global;
	114	struct lttng_ust_counter_cpu counter_cpu;
32ce8569	115	char padding[USTCOMM_MSG_PADDING2];
67c5b804	116	} u;
b3f60bbf	117	} LTTNG_PACKED;
67c5b804	118
9eb62b9c MD	119	/*
	120	* Data structure for the response from UST to the session daemon.
	121	* cmd_type is sent back in the reply for validation.
	122	*/
32ce8569 MD	123	#define USTCOMM_REPLY_PADDING1 32
32ce8569 MD	124	#define USTCOMM_REPLY_PADDING2 32
57773204	125	struct ustcomm_ust_reply {
46050b1a MD	126	uint32_t handle;
46050b1a MD	127	uint32_t cmd;
7f2348b8	128	int32_t ret_code; /* enum ustcomm_return_code */
1ece9766	129	uint32_t ret_val; /* return value */
32ce8569	130	char padding[USTCOMM_REPLY_PADDING1];
9eb62b9c	131	union {
193183fb MD	132	struct {
193183fb MD	133	uint64_t memory_map_size;
b3f60bbf	134	} LTTNG_PACKED channel;
381c0f1e MD	135	struct {
381c0f1e MD	136	uint64_t memory_map_size;
b3f60bbf	137	} LTTNG_PACKED stream;
57773204	138	struct lttng_ust_tracer_version version;
cbef6901	139	struct lttng_ust_tracepoint_iter tracepoint;
32ce8569	140	char padding[USTCOMM_REPLY_PADDING2];
9eb62b9c	141	} u;
b3f60bbf	142	} LTTNG_PACKED;
9eb62b9c	143
32ce8569 MD	144	struct ustcomm_notify_hdr {
	145	uint32_t notify_cmd;
	146	} LTTNG_PACKED;
	147
	148	#define USTCOMM_NOTIFY_EVENT_MSG_PADDING 32
	149	struct ustcomm_notify_event_msg {
	150	uint32_t session_objd;
	151	uint32_t channel_objd;
	152	char event_name[LTTNG_UST_SYM_NAME_LEN];
	153	int32_t loglevel;
	154	uint32_t signature_len;
	155	uint32_t fields_len;
	156	uint32_t model_emf_uri_len;
	157	char padding[USTCOMM_NOTIFY_EVENT_MSG_PADDING];
	158	/* followed by signature, fields, and model_emf_uri */
	159	} LTTNG_PACKED;
	160
	161	#define USTCOMM_NOTIFY_EVENT_REPLY_PADDING 32
	162	struct ustcomm_notify_event_reply {
	163	int32_t ret_code; /* 0: ok, negative: error code */
	164	uint32_t event_id;
	165	char padding[USTCOMM_NOTIFY_EVENT_REPLY_PADDING];
	166	} LTTNG_PACKED;
	167
c785c634 MD	168	#define USTCOMM_NOTIFY_ENUM_MSG_PADDING 32
	169	struct ustcomm_notify_enum_msg {
	170	uint32_t session_objd;
	171	char enum_name[LTTNG_UST_SYM_NAME_LEN];
	172	uint32_t entries_len;
	173	char padding[USTCOMM_NOTIFY_ENUM_MSG_PADDING];
	174	/* followed by enum entries */
	175	} LTTNG_PACKED;
	176
	177	#define USTCOMM_NOTIFY_EVENT_REPLY_PADDING 32
	178	struct ustcomm_notify_enum_reply {
	179	int32_t ret_code; /* 0: ok, negative: error code */
	180	uint64_t enum_id;
	181	char padding[USTCOMM_NOTIFY_EVENT_REPLY_PADDING];
	182	} LTTNG_PACKED;
	183
32ce8569 MD	184	#define USTCOMM_NOTIFY_CHANNEL_MSG_PADDING 32
	185	struct ustcomm_notify_channel_msg {
	186	uint32_t session_objd;
	187	uint32_t channel_objd;
	188	uint32_t ctx_fields_len;
	189	char padding[USTCOMM_NOTIFY_CHANNEL_MSG_PADDING];
	190	/* followed by context fields */
	191	} LTTNG_PACKED;
	192
	193	#define USTCOMM_NOTIFY_CHANNEL_REPLY_PADDING 32
	194	struct ustcomm_notify_channel_reply {
	195	int32_t ret_code; /* 0: ok, negative: error code */
	196	uint32_t chan_id;
	197	uint32_t header_type; /* enum ustctl_channel_header */
	198	char padding[USTCOMM_NOTIFY_CHANNEL_REPLY_PADDING];
	199	} LTTNG_PACKED;
	200
40003310 MD	201	/*
	202	* LTTNG_UST_TRACEPOINT_FIELD_LIST reply is followed by a
	203	* struct lttng_ust_field_iter field.
	204	*/
	205
57773204	206	extern int ustcomm_create_unix_sock(const char *pathname);
451d66b2 MD	207	extern int ustcomm_connect_unix_sock(const char *pathname,
451d66b2 MD	208	long timeout);
57773204 MD	209	extern int ustcomm_accept_unix_sock(int sock);
	210	extern int ustcomm_listen_unix_sock(int sock);
	211	extern int ustcomm_close_unix_sock(int sock);
74d81a6c	212
57773204	213	extern ssize_t ustcomm_recv_unix_sock(int sock, void *buf, size_t len);
32ce8569	214	extern ssize_t ustcomm_send_unix_sock(int sock, const void *buf, size_t len);
74d81a6c MD	215	extern ssize_t ustcomm_send_fds_unix_sock(int sock, int *fds, size_t nb_fd);
	216	extern ssize_t ustcomm_recv_fds_unix_sock(int sock, int *fds, size_t nb_fd);
	217
57773204 MD	218	extern const char *ustcomm_get_readable_code(int code);
	219	extern int ustcomm_send_app_msg(int sock, struct ustcomm_ust_msg *lum);
	220	extern int ustcomm_recv_app_reply(int sock, struct ustcomm_ust_reply *lur,
	221	uint32_t expected_handle, uint32_t expected_cmd);
	222	extern int ustcomm_send_app_cmd(int sock,
	223	struct ustcomm_ust_msg *lum,
	224	struct ustcomm_ust_reply *lur);
	225	int ustcomm_recv_fd(int sock);
67c5b804	226
74d81a6c	227	ssize_t ustcomm_recv_channel_from_sessiond(int sock,
ff0f5728	228	void *chan_data, uint64_t len, int wakeup_fd);
74d81a6c MD	229	int ustcomm_recv_stream_from_sessiond(int sock,
	230	uint64_t *memory_map_size,
	231	int shm_fd, int wakeup_fd);
4e3b3630 JR	232	ssize_t ustcomm_recv_trigger_notif_fd_from_sessiond(int sock,
	233	int *trigger_notif_fd);
	234
	235	ssize_t ustcomm_recv_counter_from_sessiond(int sock,
	236	void **counter_data, uint64_t len);
	237	int ustcomm_recv_counter_shm_from_sessiond(int sock,
	238	int *shm_fd);
74d81a6c	239
32ce8569 MD	240	/*
	241	* Returns 0 on success, negative error value on error.
	242	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	243	*/
	244	int ustcomm_send_reg_msg(int sock,
	245	enum ustctl_socket_type type,
	246	uint32_t bits_per_long,
	247	uint32_t uint8_t_alignment,
	248	uint32_t uint16_t_alignment,
	249	uint32_t uint32_t_alignment,
	250	uint32_t uint64_t_alignment,
	251	uint32_t long_alignment);
	252
	253	/*
	254	* Returns 0 on success, negative error value on error.
	255	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	256	*/
	257	int ustcomm_register_event(int sock,
c785c634	258	struct lttng_session *session,
32ce8569 MD	259	int session_objd, /* session descriptor */
	260	int channel_objd, /* channel descriptor */
	261	const char event_name, / event name (input) */
	262	int loglevel,
	263	const char signature, / event signature (input) */
	264	size_t nr_fields, /* fields */
	265	const struct lttng_event_field *fields,
	266	const char *model_emf_uri,
	267	uint32_t id); / event id (output) */
	268
c785c634 MD	269	/*
	270	* Returns 0 on success, negative error value on error.
	271	* Returns -EPIPE or -ECONNRESET if other end has hung up.
	272	*/
	273	int ustcomm_register_enum(int sock,
	274	int session_objd, /* session descriptor */
	275	const char enum_name, / enum name (input) */
	276	size_t nr_entries, /* entries */
	277	const struct lttng_enum_entry *entries,
	278	uint64_t id); / enum id (output) */
	279
32ce8569 MD	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_register_channel(int sock,
53569322	285	struct lttng_session *session,
32ce8569 MD	286	int session_objd, /* session descriptor */
	287	int channel_objd, /* channel descriptor */
	288	size_t nr_ctx_fields,
83e43212	289	const struct lttng_ctx_field *ctx_fields,
32ce8569 MD	290	uint32_t chan_id, / channel id (output) */
	291	int header_type); / header type (output) */
	292
ff517991 MD	293	int ustcomm_setsockopt_rcv_timeout(int sock, unsigned int msec);
	294	int ustcomm_setsockopt_snd_timeout(int sock, unsigned int msec);
	295
b35d179d	296	#endif /* _LTTNG_UST_COMM_H */