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

#ifndef _LTTNG_UST_ABI_H
#define _LTTNG_UST_ABI_H

/*
 * lttng/ust-abi.h
 *
 * LTTng-UST ABI header
 *
 * Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * 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;
	char *shm_path;
	int wait_fd;
	char *wait_pipe_path;
	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;
		char *shm_path;
		int *wait_fd;
		char *wait_pipe_path;
		uint64_t *memory_map_size;
	} channel;
	struct {
		int *shm_fd;
		char *shm_path;
		int *wait_fd;
		char *wait_pipe_path;
		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	* LTTng-UST ABI header
	8	*
	9	* Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	10	*
	11	* Permission is hereby granted, free of charge, to any person obtaining a copy
	12	* of this software and associated documentation files (the "Software"), to deal
	13	* in the Software without restriction, including without limitation the rights
	14	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	15	* copies of the Software, and to permit persons to whom the Software is
	16	* furnished to do so, subject to the following conditions:
	17	*
	18	* The above copyright notice and this permission notice shall be included in
	19	* all copies or substantial portions of the Software.
	20	*/
	21
	22	#include <stdint.h>
	23
	24	#define LTTNG_UST_SYM_NAME_LEN 256
	25
	26	#define LTTNG_UST_COMM_VERSION_MAJOR 2
	27	#define LTTNG_UST_COMM_VERSION_MINOR 0
	28
	29	enum lttng_ust_instrumentation {
	30	LTTNG_UST_TRACEPOINT = 0,
	31	LTTNG_UST_PROBE = 1,
	32	LTTNG_UST_FUNCTION = 2,
	33	};
	34
	35	enum lttng_ust_loglevel_type {
	36	LTTNG_UST_LOGLEVEL_ALL = 0,
	37	LTTNG_UST_LOGLEVEL_RANGE = 1,
	38	LTTNG_UST_LOGLEVEL_SINGLE = 2,
	39	};
	40
	41	enum lttng_ust_output {
	42	LTTNG_UST_MMAP = 0,
	43	};
	44
	45	struct lttng_ust_tracer_version {
	46	uint32_t major;
	47	uint32_t minor;
	48	uint32_t patchlevel;
	49	};
	50
	51	#define LTTNG_UST_CHANNEL_PADDING LTTNG_UST_SYM_NAME_LEN + 32
	52	struct lttng_ust_channel {
	53	int overwrite; /* 1: overwrite, 0: discard */
	54	uint64_t subbuf_size; /* in bytes */
	55	uint64_t num_subbuf;
	56	unsigned int switch_timer_interval; /* usecs */
	57	unsigned int read_timer_interval; /* usecs */
	58	enum lttng_ust_output output; /* output mode */
	59	char padding[LTTNG_UST_CHANNEL_PADDING];
	60	};
	61
	62	#define LTTNG_UST_STREAM_PADDING1 16
	63	#define LTTNG_UST_STREAM_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	64	struct lttng_ust_stream {
	65	char padding[LTTNG_UST_STREAM_PADDING1];
	66
	67	union {
	68	char padding[LTTNG_UST_STREAM_PADDING2];
	69	} u;
	70	};
	71
	72	#define LTTNG_UST_EVENT_PADDING1 16
	73	#define LTTNG_UST_EVENT_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	74	struct lttng_ust_event {
	75	enum lttng_ust_instrumentation instrumentation;
	76	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	77
	78	enum lttng_ust_loglevel_type loglevel_type;
	79	int loglevel; /* value, -1: all */
	80	char padding[LTTNG_UST_EVENT_PADDING1];
	81
	82	/* Per instrumentation type configuration */
	83	union {
	84	char padding[LTTNG_UST_EVENT_PADDING2];
	85	} u;
	86	};
	87
	88	enum lttng_ust_context_type {
	89	LTTNG_UST_CONTEXT_VTID = 0,
	90	LTTNG_UST_CONTEXT_VPID = 1,
	91	LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
	92	LTTNG_UST_CONTEXT_PROCNAME = 3,
	93	};
	94
	95	#define LTTNG_UST_CONTEXT_PADDING1 16
	96	#define LTTNG_UST_CONTEXT_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	97	struct lttng_ust_context {
	98	enum lttng_ust_context_type ctx;
	99	char padding[LTTNG_UST_CONTEXT_PADDING1];
	100
	101	union {
	102	char padding[LTTNG_UST_CONTEXT_PADDING2];
	103	} u;
	104	};
	105
	106	/*
	107	* Tracer channel attributes.
	108	*/
	109	#define LTTNG_UST_CHANNEL_ATTR_PADDING LTTNG_UST_SYM_NAME_LEN + 32
	110	struct lttng_ust_channel_attr {
	111	int overwrite; /* 1: overwrite, 0: discard */
	112	uint64_t subbuf_size; /* bytes */
	113	uint64_t num_subbuf; /* power of 2 */
	114	unsigned int switch_timer_interval; /* usec */
	115	unsigned int read_timer_interval; /* usec */
	116	enum lttng_ust_output output; /* splice, mmap */
	117	char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
	118	};
	119
	120	#define LTTNG_UST_TRACEPOINT_ITER_PADDING 16
	121	struct lttng_ust_tracepoint_iter {
	122	char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */
	123	int loglevel;
	124	char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
	125	};
	126
	127	#define LTTNG_UST_OBJECT_DATA_PADDING LTTNG_UST_SYM_NAME_LEN + 32
	128	struct lttng_ust_object_data {
	129	int handle;
	130	int shm_fd;
	131	char *shm_path;
	132	int wait_fd;
	133	char *wait_pipe_path;
	134	uint64_t memory_map_size;
	135	char padding[LTTNG_UST_OBJECT_DATA_PADDING];
	136	};
	137
	138	enum lttng_ust_calibrate_type {
	139	LTTNG_UST_CALIBRATE_TRACEPOINT,
	140	};
	141
	142	#define LTTNG_UST_CALIBRATE_PADDING1 16
	143	#define LTTNG_UST_CALIBRATE_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	144	struct lttng_ust_calibrate {
	145	enum lttng_ust_calibrate_type type; /* type (input) */
	146	char padding[LTTNG_UST_CALIBRATE_PADDING1];
	147
	148	union {
	149	char padding[LTTNG_UST_CALIBRATE_PADDING2];
	150	} u;
	151	};
	152
	153	#define _UST_CMD(minor) (minor)
	154	#define _UST_CMDR(minor, type) (minor)
	155	#define _UST_CMDW(minor, type) (minor)
	156
	157	/* Handled by object descriptor */
	158	#define LTTNG_UST_RELEASE _UST_CMD(0x1)
	159
	160	/* Handled by object cmd */
	161
	162	/* LTTng-UST commands */
	163	#define LTTNG_UST_SESSION _UST_CMD(0x40)
	164	#define LTTNG_UST_TRACER_VERSION \
	165	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
	166	#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
	167	#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
	168	#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
	169
	170	/* Session FD commands */
	171	#define LTTNG_UST_METADATA \
	172	_UST_CMDW(0x50, struct lttng_ust_channel)
	173	#define LTTNG_UST_CHANNEL \
	174	_UST_CMDW(0x51, struct lttng_ust_channel)
	175	#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
	176	#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
	177
	178	/* Channel FD commands */
	179	#define LTTNG_UST_STREAM _UST_CMD(0x60)
	180	#define LTTNG_UST_EVENT \
	181	_UST_CMDW(0x61, struct lttng_ust_event)
	182
	183	/* Event and Channel FD commands */
	184	#define LTTNG_UST_CONTEXT \
	185	_UST_CMDW(0x70, struct lttng_ust_context)
	186	#define LTTNG_UST_FLUSH_BUFFER \
	187	_UST_CMD(0x71)
	188
	189	/* Event, Channel and Session commands */
	190	#define LTTNG_UST_ENABLE _UST_CMD(0x80)
	191	#define LTTNG_UST_DISABLE _UST_CMD(0x81)
	192
	193	/* Tracepoint list commands */
	194	#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
	195
	196	#define LTTNG_UST_ROOT_HANDLE 0
	197
	198	struct lttng_ust_obj;
	199
	200	union ust_args {
	201	struct {
	202	int *shm_fd;
	203	char *shm_path;
	204	int *wait_fd;
	205	char *wait_pipe_path;
	206	uint64_t *memory_map_size;
	207	} channel;
	208	struct {
	209	int *shm_fd;
	210	char *shm_path;
	211	int *wait_fd;
	212	char *wait_pipe_path;
	213	uint64_t *memory_map_size;
	214	} stream;
	215	};
	216
	217	struct lttng_ust_objd_ops {
	218	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
	219	union ust_args *args);
	220	int (*release)(int objd);
	221	};
	222
	223	/* Create root handle. Always ID 0. */
	224	int lttng_abi_create_root_handle(void);
	225
	226	const struct lttng_ust_objd_ops *objd_ops(int id);
	227	int lttng_ust_objd_unref(int id);
	228
	229	void lttng_ust_abi_exit(void);
	230	void lttng_ust_events_exit(void);
	231
	232	#endif /* _LTTNG_UST_ABI_H */