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

#ifndef _LTTNG_UST_ABI_H
#define _LTTNG_UST_ABI_H

/*
 * lttng-ust-abi.h
 *
 * Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * LTTng-UST ABI header
 *
 * Dual LGPL v2.1/GPL v2 license.
 */

#include <stdint.h>

#define LTTNG_UST_SYM_NAME_LEN	128

#define LTTNG_UST_COMM_VERSION_MAJOR		0
#define LTTNG_UST_COMM_VERSION_MINOR		1

enum lttng_ust_instrumentation {
	LTTNG_UST_TRACEPOINT	= 0,
	LTTNG_UST_PROBE		= 1,
	LTTNG_UST_FUNCTION	= 2,
};

enum lttng_ust_output {
	LTTNG_UST_MMAP		= 0,
};

struct lttng_ust_tracer_version {
	uint32_t version;
	uint32_t patchlevel;
	uint32_t sublevel;
};

struct lttng_ust_channel {
	int overwrite;				/* 1: overwrite, 0: discard */
	uint64_t subbuf_size;			/* in bytes */
	uint64_t num_subbuf;
	unsigned int switch_timer_interval;	/* usecs */
	unsigned int read_timer_interval;	/* usecs */
	enum lttng_ust_output output;		/* output mode */
	/* The following fields are used internally within UST. */
	int shm_fd;
	int wait_fd;
	uint64_t memory_map_size;
};

/*
 * This structure is only used internally within UST. It is not per-se
 * part of the communication between sessiond and UST.
 */
struct lttng_ust_stream {
	int shm_fd;
	int wait_fd;
	uint64_t memory_map_size;
};

struct lttng_ust_event {
	char name[LTTNG_UST_SYM_NAME_LEN];	/* event name */
	enum lttng_ust_instrumentation instrumentation;
	/* Per instrumentation type configuration */
	union {
	} u;
};

enum lttng_ust_context_type {
	LTTNG_UST_CONTEXT_PTHREAD_ID		= 0,
};

struct lttng_ust_context {
	enum lttng_ust_context_type ctx;
	union {
	} u;
};

#define _UST_CMD(minor)				(minor)
#define _UST_CMDR(minor, type)			(minor)
#define _UST_CMDW(minor, type)			(minor)

/* Handled by object descriptor */
#define LTTNG_UST_RELEASE			_UST_CMD(0x1)

/* Handled by object cmd */

/* LTTng-UST commands */
#define LTTNG_UST_SESSION			_UST_CMD(0x40)
#define LTTNG_UST_TRACER_VERSION		\
	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
#define LTTNG_UST_TRACEPOINT_LIST		_UST_CMD(0x42)
#define LTTNG_UST_WAIT_QUIESCENT		_UST_CMD(0x43)
#define LTTNG_UST_REGISTER_DONE			_UST_CMD(0x44)

/* Session FD commands */
#define LTTNG_UST_METADATA			\
	_UST_CMDW(0x50, struct lttng_ust_channel)
#define LTTNG_UST_CHANNEL			\
	_UST_CMDW(0x51, struct lttng_ust_channel)
#define LTTNG_UST_SESSION_START			_UST_CMD(0x52)
#define LTTNG_UST_SESSION_STOP			_UST_CMD(0x53)

/* Channel FD commands */
#define LTTNG_UST_STREAM			_UST_CMD(0x60)
#define LTTNG_UST_EVENT			\
	_UST_CMDW(0x61, struct lttng_ust_event)

/* Event and Channel FD commands */
#define LTTNG_UST_CONTEXT			\
	_UST_CMDW(0x70, struct lttng_ust_context)

/* Event, Channel and Session commands */
#define LTTNG_UST_ENABLE			_UST_CMD(0x80)
#define LTTNG_UST_DISABLE			_UST_CMD(0x81)

#define LTTNG_UST_ROOT_HANDLE	0

struct obj;

struct objd_ops {
	long (*cmd)(int objd, unsigned int cmd, unsigned long arg);
	int (*release)(int objd);
};

/* Create root handle. Always ID 0. */
int lttng_abi_create_root_handle(void);

const struct objd_ops *objd_ops(int id);
int objd_unref(int id);

void lttng_ust_abi_exit(void);
void ltt_events_exit(void);

#endif /* _LTTNG_UST_ABI_H */
Commit	Line	Data
9f3fdbc6 MD	1	#ifndef _LTTNG_UST_ABI_H
	2	#define _LTTNG_UST_ABI_H
	3
	4	/*
	5	* lttng-ust-abi.h
	6	*
	7	* Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
	9	* LTTng-UST ABI header
	10	*
	11	* Dual LGPL v2.1/GPL v2 license.
	12	*/
	13
0a42beb6 MD	14	#include <stdint.h>
0a42beb6 MD	15
9f3fdbc6 MD	16	#define LTTNG_UST_SYM_NAME_LEN 128
9f3fdbc6 MD	17
b35d179d MD	18	#define LTTNG_UST_COMM_VERSION_MAJOR 0
	19	#define LTTNG_UST_COMM_VERSION_MINOR 1
	20
9f3fdbc6 MD	21	enum lttng_ust_instrumentation {
9f3fdbc6 MD	22	LTTNG_UST_TRACEPOINT = 0,
b35d179d MD	23	LTTNG_UST_PROBE = 1,
b35d179d MD	24	LTTNG_UST_FUNCTION = 2,
9f3fdbc6 MD	25	};
9f3fdbc6 MD	26
9f3fdbc6	27	enum lttng_ust_output {
b35d179d	28	LTTNG_UST_MMAP = 0,
9f3fdbc6 MD	29	};
9f3fdbc6 MD	30
b35d179d MD	31	struct lttng_ust_tracer_version {
	32	uint32_t version;
	33	uint32_t patchlevel;
	34	uint32_t sublevel;
	35	};
9f3fdbc6 MD	36
	37	struct lttng_ust_channel {
	38	int overwrite; /* 1: overwrite, 0: discard */
	39	uint64_t subbuf_size; /* in bytes */
	40	uint64_t num_subbuf;
	41	unsigned int switch_timer_interval; /* usecs */
	42	unsigned int read_timer_interval; /* usecs */
b35d179d	43	enum lttng_ust_output output; /* output mode */
193183fb MD	44	/* The following fields are used internally within UST. */
	45	int shm_fd;
	46	int wait_fd;
	47	uint64_t memory_map_size;
9f3fdbc6 MD	48	};
9f3fdbc6 MD	49
381c0f1e MD	50	/*
	51	* This structure is only used internally within UST. It is not per-se
	52	* part of the communication between sessiond and UST.
	53	*/
	54	struct lttng_ust_stream {
	55	int shm_fd;
	56	int wait_fd;
	57	uint64_t memory_map_size;
	58	};
	59
9f3fdbc6 MD	60	struct lttng_ust_event {
	61	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	62	enum lttng_ust_instrumentation instrumentation;
	63	/* Per instrumentation type configuration */
	64	union {
	65	} u;
	66	};
	67
9f3fdbc6	68	enum lttng_ust_context_type {
8de38cf7	69	LTTNG_UST_CONTEXT_PTHREAD_ID = 0,
9f3fdbc6 MD	70	};
	71
	72	struct lttng_ust_context {
	73	enum lttng_ust_context_type ctx;
	74	union {
	75	} u;
	76	};
	77
	78	#define _UST_CMD(minor) (minor)
	79	#define _UST_CMDR(minor, type) (minor)
	80	#define _UST_CMDW(minor, type) (minor)
	81
46050b1a MD	82	/* Handled by object descriptor */
	83	#define LTTNG_UST_RELEASE _UST_CMD(0x1)
	84
	85	/* Handled by object cmd */
	86
9f3fdbc6 MD	87	/* LTTng-UST commands */
	88	#define LTTNG_UST_SESSION _UST_CMD(0x40)
	89	#define LTTNG_UST_TRACER_VERSION \
	90	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
	91	#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
	92	#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
11ff9c7d	93	#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
9f3fdbc6	94
46050b1a	95	/* Session FD commands */
9f3fdbc6 MD	96	#define LTTNG_UST_METADATA \
	97	_UST_CMDW(0x50, struct lttng_ust_channel)
	98	#define LTTNG_UST_CHANNEL \
	99	_UST_CMDW(0x51, struct lttng_ust_channel)
	100	#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
	101	#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
	102
46050b1a	103	/* Channel FD commands */
9f3fdbc6 MD	104	#define LTTNG_UST_STREAM _UST_CMD(0x60)
	105	#define LTTNG_UST_EVENT \
	106	_UST_CMDW(0x61, struct lttng_ust_event)
	107
46050b1a	108	/* Event and Channel FD commands */
9f3fdbc6 MD	109	#define LTTNG_UST_CONTEXT \
	110	_UST_CMDW(0x70, struct lttng_ust_context)
	111
46050b1a	112	/* Event, Channel and Session commands */
9f3fdbc6 MD	113	#define LTTNG_UST_ENABLE _UST_CMD(0x80)
	114	#define LTTNG_UST_DISABLE _UST_CMD(0x81)
	115
46050b1a MD	116	#define LTTNG_UST_ROOT_HANDLE 0
	117
	118	struct obj;
	119
	120	struct objd_ops {
	121	long (*cmd)(int objd, unsigned int cmd, unsigned long arg);
	122	int (*release)(int objd);
	123	};
	124
	125	/* Create root handle. Always ID 0. */
	126	int lttng_abi_create_root_handle(void);
	127
	128	const struct objd_ops *objd_ops(int id);
1ea11eab	129	int objd_unref(int id);
46050b1a MD	130
46050b1a MD	131	void lttng_ust_abi_exit(void);
1ea11eab	132	void ltt_events_exit(void);
b35d179d	133
9f3fdbc6	134	#endif /* _LTTNG_UST_ABI_H */