[lttng-ust.git] / include / 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
 *
 * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
 * OR IMPLIED.  ANY USE IS AT YOUR OWN RISK.
 *
 * Permission is hereby granted to use or copy this program
 * for any purpose,  provided the above notices are retained on all copies.
 * Permission to modify the code and to distribute modified code is granted,
 * provided the above notices are retained, and a notice that the code was
 * modified is included with the above copyright notice.
 */

#include <stdint.h>

#define LTTNG_UST_SYM_NAME_LEN	256

#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,
	LTTNG_UST_TRACEPOINT_LOGLEVEL	= 3,
};

enum lttng_ust_output {
	LTTNG_UST_MMAP		= 0,
};

struct lttng_ust_tracer_version {
	uint32_t major;
	uint32_t minor;
	uint32_t patchlevel;
};

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 */
};

/*
 * 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_VTID			= 0,
	LTTNG_UST_CONTEXT_VPID			= 1,
	LTTNG_UST_CONTEXT_PTHREAD_ID		= 2,
	LTTNG_UST_CONTEXT_PROCNAME		= 3,
};

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

/*
 * Tracer channel attributes.
 */
struct lttng_ust_channel_attr {
	int overwrite;				/* 1: overwrite, 0: discard */
	uint64_t subbuf_size;			/* bytes */
	uint64_t num_subbuf;			/* power of 2 */
	unsigned int switch_timer_interval;	/* usec */
	unsigned int read_timer_interval;	/* usec */
	enum lttng_ust_output output;		/* splice, mmap */
};

struct lttng_ust_tracepoint_iter {
	char name[LTTNG_UST_SYM_NAME_LEN];	/* provider:name */
	char loglevel[LTTNG_UST_SYM_NAME_LEN];	/* loglevel */
	int64_t loglevel_value;
};

struct lttng_ust_object_data {
	int handle;
	int shm_fd;
	int wait_fd;
	uint64_t memory_map_size;
};

#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)
#define LTTNG_UST_FLUSH_BUFFER			\
	_UST_CMD(0x71)

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

/* Tracepoint list commands */
#define LTTNG_UST_TRACEPOINT_LIST_GET		_UST_CMD(0x90)

#define LTTNG_UST_ROOT_HANDLE	0

struct lttng_ust_obj;

union ust_args {
	struct {
		int *shm_fd;
		int *wait_fd;
		uint64_t *memory_map_size;
	} channel;
	struct {
		int *shm_fd;
		int *wait_fd;
		uint64_t *memory_map_size;
	} stream;
};

struct lttng_ust_objd_ops {
	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
		union ust_args *args);
	int (*release)(int objd);
};

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

const struct lttng_ust_objd_ops *objd_ops(int id);
int lttng_ust_objd_unref(int id);

void lttng_ust_abi_exit(void);
void lttng_ust_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	/*
4318ae1b	5	* lttng/ust-abi.h
9f3fdbc6 MD	6	*
	7	* Copyright 2010-2011 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
	9	* LTTng-UST ABI header
	10	*
a60d70e6 MD	11	* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
	12	* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
	13	*
	14	* Permission is hereby granted to use or copy this program
	15	* for any purpose, provided the above notices are retained on all copies.
	16	* Permission to modify the code and to distribute modified code is granted,
	17	* provided the above notices are retained, and a notice that the code was
	18	* modified is included with the above copyright notice.
9f3fdbc6 MD	19	*/
9f3fdbc6 MD	20
0a42beb6 MD	21	#include <stdint.h>
0a42beb6 MD	22
f56cd1d5	23	#define LTTNG_UST_SYM_NAME_LEN 256
9f3fdbc6	24
b35d179d MD	25	#define LTTNG_UST_COMM_VERSION_MAJOR 0
	26	#define LTTNG_UST_COMM_VERSION_MINOR 1
	27
9f3fdbc6	28	enum lttng_ust_instrumentation {
df854e41 MD	29	LTTNG_UST_TRACEPOINT = 0,
	30	LTTNG_UST_PROBE = 1,
	31	LTTNG_UST_FUNCTION = 2,
	32	LTTNG_UST_TRACEPOINT_LOGLEVEL = 3,
9f3fdbc6 MD	33	};
9f3fdbc6 MD	34
9f3fdbc6	35	enum lttng_ust_output {
b35d179d	36	LTTNG_UST_MMAP = 0,
9f3fdbc6 MD	37	};
9f3fdbc6 MD	38
b35d179d	39	struct lttng_ust_tracer_version {
b728d87e MD	40	uint32_t major;
b728d87e MD	41	uint32_t minor;
b35d179d	42	uint32_t patchlevel;
b35d179d	43	};
9f3fdbc6 MD	44
	45	struct lttng_ust_channel {
	46	int overwrite; /* 1: overwrite, 0: discard */
	47	uint64_t subbuf_size; /* in bytes */
	48	uint64_t num_subbuf;
	49	unsigned int switch_timer_interval; /* usecs */
	50	unsigned int read_timer_interval; /* usecs */
b35d179d	51	enum lttng_ust_output output; /* output mode */
9f3fdbc6 MD	52	};
9f3fdbc6 MD	53
381c0f1e MD	54	/*
	55	* This structure is only used internally within UST. It is not per-se
	56	* part of the communication between sessiond and UST.
	57	*/
	58	struct lttng_ust_stream {
	59	int shm_fd;
	60	int wait_fd;
	61	uint64_t memory_map_size;
	62	};
	63
9f3fdbc6 MD	64	struct lttng_ust_event {
	65	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	66	enum lttng_ust_instrumentation instrumentation;
	67	/* Per instrumentation type configuration */
	68	union {
	69	} u;
	70	};
	71
9f3fdbc6	72	enum lttng_ust_context_type {
3b402b40	73	LTTNG_UST_CONTEXT_VTID = 0,
c1ef86f0 MD	74	LTTNG_UST_CONTEXT_VPID = 1,
c1ef86f0 MD	75	LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
4847e9bb	76	LTTNG_UST_CONTEXT_PROCNAME = 3,
9f3fdbc6 MD	77	};
	78
	79	struct lttng_ust_context {
	80	enum lttng_ust_context_type ctx;
	81	union {
	82	} u;
	83	};
	84
92462b01 MD	85	/*
	86	* Tracer channel attributes.
	87	*/
	88	struct lttng_ust_channel_attr {
	89	int overwrite; /* 1: overwrite, 0: discard */
	90	uint64_t subbuf_size; /* bytes */
	91	uint64_t num_subbuf; /* power of 2 */
	92	unsigned int switch_timer_interval; /* usec */
	93	unsigned int read_timer_interval; /* usec */
	94	enum lttng_ust_output output; /* splice, mmap */
	95	};
	96
cbef6901 MD	97	struct lttng_ust_tracepoint_iter {
	98	char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */
	99	char loglevel[LTTNG_UST_SYM_NAME_LEN]; /* loglevel */
	100	int64_t loglevel_value;
	101	};
	102
92462b01 MD	103	struct lttng_ust_object_data {
	104	int handle;
	105	int shm_fd;
	106	int wait_fd;
	107	uint64_t memory_map_size;
	108	};
	109
9f3fdbc6 MD	110	#define _UST_CMD(minor) (minor)
	111	#define _UST_CMDR(minor, type) (minor)
	112	#define _UST_CMDW(minor, type) (minor)
	113
46050b1a MD	114	/* Handled by object descriptor */
	115	#define LTTNG_UST_RELEASE _UST_CMD(0x1)
	116
	117	/* Handled by object cmd */
	118
9f3fdbc6 MD	119	/* LTTng-UST commands */
	120	#define LTTNG_UST_SESSION _UST_CMD(0x40)
	121	#define LTTNG_UST_TRACER_VERSION \
	122	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
	123	#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
	124	#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
11ff9c7d	125	#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
9f3fdbc6	126
46050b1a	127	/* Session FD commands */
9f3fdbc6 MD	128	#define LTTNG_UST_METADATA \
	129	_UST_CMDW(0x50, struct lttng_ust_channel)
	130	#define LTTNG_UST_CHANNEL \
	131	_UST_CMDW(0x51, struct lttng_ust_channel)
	132	#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
	133	#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
	134
46050b1a	135	/* Channel FD commands */
9f3fdbc6 MD	136	#define LTTNG_UST_STREAM _UST_CMD(0x60)
	137	#define LTTNG_UST_EVENT \
	138	_UST_CMDW(0x61, struct lttng_ust_event)
	139
46050b1a	140	/* Event and Channel FD commands */
9f3fdbc6 MD	141	#define LTTNG_UST_CONTEXT \
9f3fdbc6 MD	142	_UST_CMDW(0x70, struct lttng_ust_context)
43d330a4	143	#define LTTNG_UST_FLUSH_BUFFER \
43861eab	144	_UST_CMD(0x71)
9f3fdbc6	145
46050b1a	146	/* Event, Channel and Session commands */
9f3fdbc6 MD	147	#define LTTNG_UST_ENABLE _UST_CMD(0x80)
	148	#define LTTNG_UST_DISABLE _UST_CMD(0x81)
	149
51489cad MD	150	/* Tracepoint list commands */
	151	#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
	152
46050b1a MD	153	#define LTTNG_UST_ROOT_HANDLE 0
46050b1a MD	154
b61ce3b2	155	struct lttng_ust_obj;
46050b1a	156
ef9ff354 MD	157	union ust_args {
	158	struct {
	159	int *shm_fd;
	160	int *wait_fd;
	161	uint64_t *memory_map_size;
	162	} channel;
	163	struct {
	164	int *shm_fd;
	165	int *wait_fd;
	166	uint64_t *memory_map_size;
	167	} stream;
	168	};
	169
b61ce3b2	170	struct lttng_ust_objd_ops {
ef9ff354 MD	171	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
ef9ff354 MD	172	union ust_args *args);
46050b1a MD	173	int (*release)(int objd);
	174	};
	175
	176	/* Create root handle. Always ID 0. */
	177	int lttng_abi_create_root_handle(void);
	178
b61ce3b2	179	const struct lttng_ust_objd_ops *objd_ops(int id);
d4419b81	180	int lttng_ust_objd_unref(int id);
46050b1a MD	181
46050b1a MD	182	void lttng_ust_abi_exit(void);
003fedf4	183	void lttng_ust_events_exit(void);
b35d179d	184
9f3fdbc6	185	#endif /* _LTTNG_UST_ABI_H */