[lttng-modules.git] / lttng-abi.h

#ifndef _LTTNG_ABI_H
#define _LTTNG_ABI_H

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

#include <linux/fs.h>

#define LTTNG_KERNEL_SYM_NAME_LEN	256

enum lttng_kernel_instrumentation {
	LTTNG_KERNEL_TRACEPOINT	= 0,
	LTTNG_KERNEL_KPROBE	= 1,
	LTTNG_KERNEL_FUNCTION	= 2,
	LTTNG_KERNEL_KRETPROBE	= 3,
	LTTNG_KERNEL_NOOP	= 4,	/* not hooked */
	LTTNG_KERNEL_SYSCALL	= 5,
};

/*
 * LTTng consumer mode
 */
enum lttng_kernel_output {
	LTTNG_KERNEL_SPLICE	= 0,
	LTTNG_KERNEL_MMAP	= 1,
};

/*
 * LTTng DebugFS ABI structures.
 */
#define LTTNG_KERNEL_CHANNEL_PADDING	LTTNG_KERNEL_SYM_NAME_LEN + 32
struct lttng_kernel_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_kernel_output output;	/* splice, mmap */
	char padding[LTTNG_KERNEL_CHANNEL_PADDING];
};

struct lttng_kernel_kretprobe {
	uint64_t addr;

	uint64_t offset;
	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
};

/*
 * Either addr is used, or symbol_name and offset.
 */
struct lttng_kernel_kprobe {
	uint64_t addr;

	uint64_t offset;
	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
};

struct lttng_kernel_function_tracer {
	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
};

/*
 * For syscall tracing, name = '\0' means "enable all".
 */
#define LTTNG_KERNEL_EVENT_PADDING1	16
#define LTTNG_KERNEL_EVENT_PADDING2	LTTNG_KERNEL_SYM_NAME_LEN + 32
struct lttng_kernel_event {
	char name[LTTNG_KERNEL_SYM_NAME_LEN];	/* event name */
	enum lttng_kernel_instrumentation instrumentation;
	char padding[LTTNG_KERNEL_EVENT_PADDING1];

	/* Per instrumentation type configuration */
	union {
		struct lttng_kernel_kretprobe kretprobe;
		struct lttng_kernel_kprobe kprobe;
		struct lttng_kernel_function_tracer ftrace;
		char padding[LTTNG_KERNEL_EVENT_PADDING2];
	} u;
};

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

enum lttng_kernel_calibrate_type {
	LTTNG_KERNEL_CALIBRATE_KRETPROBE,
};

struct lttng_kernel_calibrate {
	enum lttng_kernel_calibrate_type type;	/* type (input) */
};

enum lttng_kernel_context_type {
	LTTNG_KERNEL_CONTEXT_PID		= 0,
	LTTNG_KERNEL_CONTEXT_PERF_COUNTER	= 1,
	LTTNG_KERNEL_CONTEXT_PROCNAME		= 2,
	LTTNG_KERNEL_CONTEXT_PRIO		= 3,
	LTTNG_KERNEL_CONTEXT_NICE		= 4,
	LTTNG_KERNEL_CONTEXT_VPID		= 5,
	LTTNG_KERNEL_CONTEXT_TID		= 6,
	LTTNG_KERNEL_CONTEXT_VTID		= 7,
	LTTNG_KERNEL_CONTEXT_PPID		= 8,
	LTTNG_KERNEL_CONTEXT_VPPID		= 9,
};

struct lttng_kernel_perf_counter_ctx {
	uint32_t type;
	uint64_t config;
	char name[LTTNG_KERNEL_SYM_NAME_LEN];
};

#define LTTNG_KERNEL_CONTEXT_PADDING1	16
#define LTTNG_KERNEL_CONTEXT_PADDING2	LTTNG_KERNEL_SYM_NAME_LEN + 32
struct lttng_kernel_context {
	enum lttng_kernel_context_type ctx;
	char padding[LTTNG_KERNEL_CONTEXT_PADDING1];

	union {
		struct lttng_kernel_perf_counter_ctx perf_counter;
		char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
	} u;
};

/* LTTng file descriptor ioctl */
#define LTTNG_KERNEL_SESSION			_IO(0xF6, 0x40)
#define LTTNG_KERNEL_TRACER_VERSION		\
	_IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
#define LTTNG_KERNEL_TRACEPOINT_LIST		_IO(0xF6, 0x42)
#define LTTNG_KERNEL_WAIT_QUIESCENT		_IO(0xF6, 0x43)
#define LTTNG_KERNEL_CALIBRATE			\
	_IOWR(0xF6, 0x44, struct lttng_kernel_calibrate)

/* Session FD ioctl */
#define LTTNG_KERNEL_METADATA			\
	_IOW(0xF6, 0x50, struct lttng_kernel_channel)
#define LTTNG_KERNEL_CHANNEL			\
	_IOW(0xF6, 0x51, struct lttng_kernel_channel)
#define LTTNG_KERNEL_SESSION_START		_IO(0xF6, 0x52)
#define LTTNG_KERNEL_SESSION_STOP		_IO(0xF6, 0x53)

/* Channel FD ioctl */
#define LTTNG_KERNEL_STREAM			_IO(0xF6, 0x60)
#define LTTNG_KERNEL_EVENT			\
	_IOW(0xF6, 0x61, struct lttng_kernel_event)

/* Event and Channel FD ioctl */
#define LTTNG_KERNEL_CONTEXT			\
	_IOW(0xF6, 0x70, struct lttng_kernel_context)

/* Event, Channel and Session ioctl */
#define LTTNG_KERNEL_ENABLE			_IO(0xF6, 0x80)
#define LTTNG_KERNEL_DISABLE			_IO(0xF6, 0x81)

#endif /* _LTTNG_ABI_H */
Commit	Line	Data
	1	#ifndef _LTTNG_ABI_H
	2	#define _LTTNG_ABI_H
	3
	4	/*
	5	* lttng-abi.h
	6	*
	7	* Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
	9	* LTTng ABI header
	10	*
	11	* Dual LGPL v2.1/GPL v2 license.
	12	*/
	13
	14	#include <linux/fs.h>
	15
	16	#define LTTNG_KERNEL_SYM_NAME_LEN 256
	17
	18	enum lttng_kernel_instrumentation {
	19	LTTNG_KERNEL_TRACEPOINT = 0,
	20	LTTNG_KERNEL_KPROBE = 1,
	21	LTTNG_KERNEL_FUNCTION = 2,
	22	LTTNG_KERNEL_KRETPROBE = 3,
	23	LTTNG_KERNEL_NOOP = 4, /* not hooked */
	24	LTTNG_KERNEL_SYSCALL = 5,
	25	};
	26
	27	/*
	28	* LTTng consumer mode
	29	*/
	30	enum lttng_kernel_output {
	31	LTTNG_KERNEL_SPLICE = 0,
	32	LTTNG_KERNEL_MMAP = 1,
	33	};
	34
	35	/*
	36	* LTTng DebugFS ABI structures.
	37	*/
	38	#define LTTNG_KERNEL_CHANNEL_PADDING LTTNG_KERNEL_SYM_NAME_LEN + 32
	39	struct lttng_kernel_channel {
	40	int overwrite; /* 1: overwrite, 0: discard */
	41	uint64_t subbuf_size; /* in bytes */
	42	uint64_t num_subbuf;
	43	unsigned int switch_timer_interval; /* usecs */
	44	unsigned int read_timer_interval; /* usecs */
	45	enum lttng_kernel_output output; /* splice, mmap */
	46	char padding[LTTNG_KERNEL_CHANNEL_PADDING];
	47	};
	48
	49	struct lttng_kernel_kretprobe {
	50	uint64_t addr;
	51
	52	uint64_t offset;
	53	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
	54	};
	55
	56	/*
	57	* Either addr is used, or symbol_name and offset.
	58	*/
	59	struct lttng_kernel_kprobe {
	60	uint64_t addr;
	61
	62	uint64_t offset;
	63	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
	64	};
	65
	66	struct lttng_kernel_function_tracer {
	67	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
	68	};
	69
	70	/*
	71	* For syscall tracing, name = '\0' means "enable all".
	72	*/
	73	#define LTTNG_KERNEL_EVENT_PADDING1 16
	74	#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
	75	struct lttng_kernel_event {
	76	char name[LTTNG_KERNEL_SYM_NAME_LEN]; /* event name */
	77	enum lttng_kernel_instrumentation instrumentation;
	78	char padding[LTTNG_KERNEL_EVENT_PADDING1];
	79
	80	/* Per instrumentation type configuration */
	81	union {
	82	struct lttng_kernel_kretprobe kretprobe;
	83	struct lttng_kernel_kprobe kprobe;
	84	struct lttng_kernel_function_tracer ftrace;
	85	char padding[LTTNG_KERNEL_EVENT_PADDING2];
	86	} u;
	87	};
	88
	89	struct lttng_kernel_tracer_version {
	90	uint32_t version;
	91	uint32_t patchlevel;
	92	uint32_t sublevel;
	93	};
	94
	95	enum lttng_kernel_calibrate_type {
	96	LTTNG_KERNEL_CALIBRATE_KRETPROBE,
	97	};
	98
	99	struct lttng_kernel_calibrate {
	100	enum lttng_kernel_calibrate_type type; /* type (input) */
	101	};
	102
	103	enum lttng_kernel_context_type {
	104	LTTNG_KERNEL_CONTEXT_PID = 0,
	105	LTTNG_KERNEL_CONTEXT_PERF_COUNTER = 1,
	106	LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
	107	LTTNG_KERNEL_CONTEXT_PRIO = 3,
	108	LTTNG_KERNEL_CONTEXT_NICE = 4,
	109	LTTNG_KERNEL_CONTEXT_VPID = 5,
	110	LTTNG_KERNEL_CONTEXT_TID = 6,
	111	LTTNG_KERNEL_CONTEXT_VTID = 7,
	112	LTTNG_KERNEL_CONTEXT_PPID = 8,
	113	LTTNG_KERNEL_CONTEXT_VPPID = 9,
	114	};
	115
	116	struct lttng_kernel_perf_counter_ctx {
	117	uint32_t type;
	118	uint64_t config;
	119	char name[LTTNG_KERNEL_SYM_NAME_LEN];
	120	};
	121
	122	#define LTTNG_KERNEL_CONTEXT_PADDING1 16
	123	#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
	124	struct lttng_kernel_context {
	125	enum lttng_kernel_context_type ctx;
	126	char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
	127
	128	union {
	129	struct lttng_kernel_perf_counter_ctx perf_counter;
	130	char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
	131	} u;
	132	};
	133
	134	/* LTTng file descriptor ioctl */
	135	#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
	136	#define LTTNG_KERNEL_TRACER_VERSION \
	137	_IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
	138	#define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x42)
	139	#define LTTNG_KERNEL_WAIT_QUIESCENT _IO(0xF6, 0x43)
	140	#define LTTNG_KERNEL_CALIBRATE \
	141	_IOWR(0xF6, 0x44, struct lttng_kernel_calibrate)
	142
	143	/* Session FD ioctl */
	144	#define LTTNG_KERNEL_METADATA \
	145	_IOW(0xF6, 0x50, struct lttng_kernel_channel)
	146	#define LTTNG_KERNEL_CHANNEL \
	147	_IOW(0xF6, 0x51, struct lttng_kernel_channel)
	148	#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x52)
	149	#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x53)
	150
	151	/* Channel FD ioctl */
	152	#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x60)
	153	#define LTTNG_KERNEL_EVENT \
	154	_IOW(0xF6, 0x61, struct lttng_kernel_event)
	155
	156	/* Event and Channel FD ioctl */
	157	#define LTTNG_KERNEL_CONTEXT \
	158	_IOW(0xF6, 0x70, struct lttng_kernel_context)
	159
	160	/* Event, Channel and Session ioctl */
	161	#define LTTNG_KERNEL_ENABLE _IO(0xF6, 0x80)
	162	#define LTTNG_KERNEL_DISABLE _IO(0xF6, 0x81)
	163
	164	#endif /* _LTTNG_ABI_H */