[lttng-tools.git] / src / bin / lttng-sessiond / 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, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 */

#include <stdint.h>

#define LTTNG_UST_SYM_NAME_LEN	256

#define LTTNG_UST_COMM_VERSION_MAJOR		2
#define LTTNG_UST_COMM_VERSION_MINOR		0

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

enum lttng_ust_loglevel_type {
	LTTNG_UST_LOGLEVEL_ALL		= 0,
	LTTNG_UST_LOGLEVEL_RANGE	= 1,
	LTTNG_UST_LOGLEVEL_SINGLE	= 2,
};

enum lttng_ust_output {
	LTTNG_UST_MMAP		= 0,
};

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

#define LTTNG_UST_CHANNEL_PADDING	LTTNG_UST_SYM_NAME_LEN + 32
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 */
	char padding[LTTNG_UST_CHANNEL_PADDING];
};

#define LTTNG_UST_STREAM_PADDING1	16
#define LTTNG_UST_STREAM_PADDING2	LTTNG_UST_SYM_NAME_LEN + 32
struct lttng_ust_stream {
	char padding[LTTNG_UST_STREAM_PADDING1];

	union {
		char padding[LTTNG_UST_STREAM_PADDING2];
	} u;
};

#define LTTNG_UST_EVENT_PADDING1	16
#define LTTNG_UST_EVENT_PADDING2	LTTNG_UST_SYM_NAME_LEN + 32
struct lttng_ust_event {
	enum lttng_ust_instrumentation instrumentation;
	char name[LTTNG_UST_SYM_NAME_LEN];	/* event name */

	enum lttng_ust_loglevel_type loglevel_type;
	int loglevel;	/* value, -1: all */
	char padding[LTTNG_UST_EVENT_PADDING1];

	/* Per instrumentation type configuration */
	union {
		char padding[LTTNG_UST_EVENT_PADDING2];
	} 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,
};

#define LTTNG_UST_CONTEXT_PADDING1	16
#define LTTNG_UST_CONTEXT_PADDING2	LTTNG_UST_SYM_NAME_LEN + 32
struct lttng_ust_context {
	enum lttng_ust_context_type ctx;
	char padding[LTTNG_UST_CONTEXT_PADDING1];

	union {
		char padding[LTTNG_UST_CONTEXT_PADDING2];
	} u;
};

/*
 * Tracer channel attributes.
 */
#define LTTNG_UST_CHANNEL_ATTR_PADDING	LTTNG_UST_SYM_NAME_LEN + 32
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 */
	char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
};

#define LTTNG_UST_TRACEPOINT_ITER_PADDING	16
struct lttng_ust_tracepoint_iter {
	char name[LTTNG_UST_SYM_NAME_LEN];	/* provider:name */
	int loglevel;
	char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
};

#define LTTNG_UST_OBJECT_DATA_PADDING		LTTNG_UST_SYM_NAME_LEN + 32
struct lttng_ust_object_data {
	int handle;
	int shm_fd;
	int wait_fd;
	uint64_t memory_map_size;
	char padding[LTTNG_UST_OBJECT_DATA_PADDING];
};

enum lttng_ust_calibrate_type {
	LTTNG_UST_CALIBRATE_TRACEPOINT,
};

#define LTTNG_UST_CALIBRATE_PADDING1	16
#define LTTNG_UST_CALIBRATE_PADDING2	LTTNG_UST_SYM_NAME_LEN + 32
struct lttng_ust_calibrate {
	enum lttng_ust_calibrate_type type;	/* type (input) */
	char padding[LTTNG_UST_CALIBRATE_PADDING1];

	union {
		char padding[LTTNG_UST_CALIBRATE_PADDING2];
	} 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)
#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
	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	* 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, free of charge, to any person obtaining a copy
	15	* of this software and associated documentation files (the "Software"), to deal
	16	* in the Software without restriction, including without limitation the rights
	17	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	18	* copies of the Software, and to permit persons to whom the Software is
	19	* furnished to do so, subject to the following conditions:
	20	*
	21	* The above copyright notice and this permission notice shall be included in
	22	* all copies or substantial portions of the Software.
	23	*/
	24
	25	#include <stdint.h>
	26
	27	#define LTTNG_UST_SYM_NAME_LEN 256
	28
	29	#define LTTNG_UST_COMM_VERSION_MAJOR 2
	30	#define LTTNG_UST_COMM_VERSION_MINOR 0
	31
	32	enum lttng_ust_instrumentation {
	33	LTTNG_UST_TRACEPOINT = 0,
	34	LTTNG_UST_PROBE = 1,
	35	LTTNG_UST_FUNCTION = 2,
	36	};
	37
	38	enum lttng_ust_loglevel_type {
	39	LTTNG_UST_LOGLEVEL_ALL = 0,
	40	LTTNG_UST_LOGLEVEL_RANGE = 1,
	41	LTTNG_UST_LOGLEVEL_SINGLE = 2,
	42	};
	43
	44	enum lttng_ust_output {
	45	LTTNG_UST_MMAP = 0,
	46	};
	47
	48	struct lttng_ust_tracer_version {
	49	uint32_t major;
	50	uint32_t minor;
	51	uint32_t patchlevel;
	52	};
	53
	54	#define LTTNG_UST_CHANNEL_PADDING LTTNG_UST_SYM_NAME_LEN + 32
	55	struct lttng_ust_channel {
	56	int overwrite; /* 1: overwrite, 0: discard */
	57	uint64_t subbuf_size; /* in bytes */
	58	uint64_t num_subbuf;
	59	unsigned int switch_timer_interval; /* usecs */
	60	unsigned int read_timer_interval; /* usecs */
	61	enum lttng_ust_output output; /* output mode */
	62	char padding[LTTNG_UST_CHANNEL_PADDING];
	63	};
	64
	65	#define LTTNG_UST_STREAM_PADDING1 16
	66	#define LTTNG_UST_STREAM_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	67	struct lttng_ust_stream {
	68	char padding[LTTNG_UST_STREAM_PADDING1];
	69
	70	union {
	71	char padding[LTTNG_UST_STREAM_PADDING2];
	72	} u;
	73	};
	74
	75	#define LTTNG_UST_EVENT_PADDING1 16
	76	#define LTTNG_UST_EVENT_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	77	struct lttng_ust_event {
	78	enum lttng_ust_instrumentation instrumentation;
	79	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	80
	81	enum lttng_ust_loglevel_type loglevel_type;
	82	int loglevel; /* value, -1: all */
	83	char padding[LTTNG_UST_EVENT_PADDING1];
	84
	85	/* Per instrumentation type configuration */
	86	union {
	87	char padding[LTTNG_UST_EVENT_PADDING2];
	88	} u;
	89	};
	90
	91	enum lttng_ust_context_type {
	92	LTTNG_UST_CONTEXT_VTID = 0,
	93	LTTNG_UST_CONTEXT_VPID = 1,
	94	LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
	95	LTTNG_UST_CONTEXT_PROCNAME = 3,
	96	};
	97
	98	#define LTTNG_UST_CONTEXT_PADDING1 16
	99	#define LTTNG_UST_CONTEXT_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	100	struct lttng_ust_context {
	101	enum lttng_ust_context_type ctx;
	102	char padding[LTTNG_UST_CONTEXT_PADDING1];
	103
	104	union {
	105	char padding[LTTNG_UST_CONTEXT_PADDING2];
	106	} u;
	107	};
	108
	109	/*
	110	* Tracer channel attributes.
	111	*/
	112	#define LTTNG_UST_CHANNEL_ATTR_PADDING LTTNG_UST_SYM_NAME_LEN + 32
	113	struct lttng_ust_channel_attr {
	114	int overwrite; /* 1: overwrite, 0: discard */
	115	uint64_t subbuf_size; /* bytes */
	116	uint64_t num_subbuf; /* power of 2 */
	117	unsigned int switch_timer_interval; /* usec */
	118	unsigned int read_timer_interval; /* usec */
	119	enum lttng_ust_output output; /* splice, mmap */
	120	char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
	121	};
	122
	123	#define LTTNG_UST_TRACEPOINT_ITER_PADDING 16
	124	struct lttng_ust_tracepoint_iter {
	125	char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */
	126	int loglevel;
	127	char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
	128	};
	129
	130	#define LTTNG_UST_OBJECT_DATA_PADDING LTTNG_UST_SYM_NAME_LEN + 32
	131	struct lttng_ust_object_data {
	132	int handle;
	133	int shm_fd;
	134	int wait_fd;
	135	uint64_t memory_map_size;
	136	char padding[LTTNG_UST_OBJECT_DATA_PADDING];
	137	};
	138
	139	enum lttng_ust_calibrate_type {
	140	LTTNG_UST_CALIBRATE_TRACEPOINT,
	141	};
	142
	143	#define LTTNG_UST_CALIBRATE_PADDING1 16
	144	#define LTTNG_UST_CALIBRATE_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	145	struct lttng_ust_calibrate {
	146	enum lttng_ust_calibrate_type type; /* type (input) */
	147	char padding[LTTNG_UST_CALIBRATE_PADDING1];
	148
	149	union {
	150	char padding[LTTNG_UST_CALIBRATE_PADDING2];
	151	} u;
	152	};
	153
	154	#define _UST_CMD(minor) (minor)
	155	#define _UST_CMDR(minor, type) (minor)
	156	#define _UST_CMDW(minor, type) (minor)
	157
	158	/* Handled by object descriptor */
	159	#define LTTNG_UST_RELEASE _UST_CMD(0x1)
	160
	161	/* Handled by object cmd */
	162
	163	/* LTTng-UST commands */
	164	#define LTTNG_UST_SESSION _UST_CMD(0x40)
	165	#define LTTNG_UST_TRACER_VERSION \
	166	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
	167	#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
	168	#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
	169	#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
	170
	171	/* Session FD commands */
	172	#define LTTNG_UST_METADATA \
	173	_UST_CMDW(0x50, struct lttng_ust_channel)
	174	#define LTTNG_UST_CHANNEL \
	175	_UST_CMDW(0x51, struct lttng_ust_channel)
	176	#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
	177	#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
	178
	179	/* Channel FD commands */
	180	#define LTTNG_UST_STREAM _UST_CMD(0x60)
	181	#define LTTNG_UST_EVENT \
	182	_UST_CMDW(0x61, struct lttng_ust_event)
	183
	184	/* Event and Channel FD commands */
	185	#define LTTNG_UST_CONTEXT \
	186	_UST_CMDW(0x70, struct lttng_ust_context)
	187	#define LTTNG_UST_FLUSH_BUFFER \
	188	_UST_CMD(0x71)
	189
	190	/* Event, Channel and Session commands */
	191	#define LTTNG_UST_ENABLE _UST_CMD(0x80)
	192	#define LTTNG_UST_DISABLE _UST_CMD(0x81)
	193
	194	/* Tracepoint list commands */
	195	#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
	196
	197	#define LTTNG_UST_ROOT_HANDLE 0
	198
	199	struct lttng_ust_obj;
	200
	201	union ust_args {
	202	struct {
	203	int *shm_fd;
	204	int *wait_fd;
	205	uint64_t *memory_map_size;
	206	} channel;
	207	struct {
	208	int *shm_fd;
	209	int *wait_fd;
	210	uint64_t *memory_map_size;
	211	} stream;
	212	};
	213
	214	struct lttng_ust_objd_ops {
	215	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
	216	union ust_args *args);
	217	int (*release)(int objd);
	218	};
	219
	220	/* Create root handle. Always ID 0. */
	221	int lttng_abi_create_root_handle(void);
	222
	223	const struct lttng_ust_objd_ops *objd_ops(int id);
	224	int lttng_ust_objd_unref(int id);
	225
	226	void lttng_ust_abi_exit(void);
	227	void lttng_ust_events_exit(void);
	228
	229	#endif /* _LTTNG_UST_ABI_H */