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

#ifndef _LTT_DEBUGFS_ABI_H
#define _LTT_DEBUGFS_ABI_H

/*
 * ltt-debugfs-abi.h
 *
 * Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * LTTng debugfs ABI header
 */

#include <linux/fs.h>

#define LTTNG_SYM_NAME_LEN	128

enum lttng_kernel_instrumentation {
	LTTNG_KERNEL_TRACEPOINTS,
	LTTNG_KERNEL_KPROBES,
	LTTNG_KERNEL_FUNCTION_TRACER,
};

/*
 * LTTng DebugFS ABI structures.
 */

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 */
};

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

	uint64_t offset;
	char symbol_name[LTTNG_SYM_NAME_LEN];
};

struct lttng_kernel_function_tracer {
	char symbol_name[LTTNG_SYM_NAME_LEN];
};

struct lttng_kernel_event {
	enum lttng_kernel_instrumentation instrumentation;
	/* Per instrumentation type configuration */
	union {
		struct lttng_kernel_kprobe kprobe;
		struct lttng_kernel_function_tracer ftrace;
	} u;
	char name[];	/* event name */
};

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

#define LTTNG_KERNEL_SESSION		_IO(0xF6, 0x40)
#define LTTNG_KERNEL_SESSION_START	_IO(0xF6, 0x41)
#define LTTNG_KERNEL_SESSION_STOP	_IO(0xF6, 0x42)
#define LTTNG_KERNEL_CHANNEL		\
	_IOW(0xF6, 0x43, struct lttng_kernel_channel)
#define LTTNG_KERNEL_STREAM		_IO(0xF6, 0x44)
#define LTTNG_KERNEL_EVENT		\
	_IOW(0xF6, 0x45, struct lttng_kernel_event)
#define LTTNG_KERNEL_METADATA		\
	_IOW(0xF6, 0x46, struct lttng_kernel_channel)
#define LTTNG_KERNEL_KPROBE		\
	_IOW(0xF6, 0x47, struct lttng_kernel_kprobe)
#define LTTNG_KERNEL_TRACER_VERSION	\
	_IOR(0xF6, 0x48, struct lttng_kernel_tracer_version)

#endif /* _LTT_DEBUGFS_ABI_H */
Commit	Line	Data
	1	#ifndef _LTT_DEBUGFS_ABI_H
	2	#define _LTT_DEBUGFS_ABI_H
	3
	4	/*
	5	* ltt-debugfs-abi.h
	6	*
	7	* Copyright 2010 (c) - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*
	9	* LTTng debugfs ABI header
	10	*/
	11
	12	#include <linux/fs.h>
	13
	14	#define LTTNG_SYM_NAME_LEN 128
	15
	16	enum lttng_kernel_instrumentation {
	17	LTTNG_KERNEL_TRACEPOINTS,
	18	LTTNG_KERNEL_KPROBES,
	19	LTTNG_KERNEL_FUNCTION_TRACER,
	20	};
	21
	22	/*
	23	* LTTng DebugFS ABI structures.
	24	*/
	25
	26	struct lttng_kernel_channel {
	27	int overwrite; /* 1: overwrite, 0: discard */
	28	uint64_t subbuf_size; /* in bytes */
	29	uint64_t num_subbuf;
	30	unsigned int switch_timer_interval; /* usecs */
	31	unsigned int read_timer_interval; /* usecs */
	32	};
	33
	34	/*
	35	* Either addr is used, or symbol_name and offset.
	36	*/
	37	struct lttng_kernel_kprobe {
	38	uint64_t addr;
	39
	40	uint64_t offset;
	41	char symbol_name[LTTNG_SYM_NAME_LEN];
	42	};
	43
	44	struct lttng_kernel_function_tracer {
	45	char symbol_name[LTTNG_SYM_NAME_LEN];
	46	};
	47
	48	struct lttng_kernel_event {
	49	enum lttng_kernel_instrumentation instrumentation;
	50	/* Per instrumentation type configuration */
	51	union {
	52	struct lttng_kernel_kprobe kprobe;
	53	struct lttng_kernel_function_tracer ftrace;
	54	} u;
	55	char name[]; /* event name */
	56	};
	57
	58	struct lttng_kernel_tracer_version {
	59	uint32_t version;
	60	uint32_t patchlevel;
	61	uint32_t sublevel;
	62	};
	63
	64	#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
	65	#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x41)
	66	#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x42)
	67	#define LTTNG_KERNEL_CHANNEL \
	68	_IOW(0xF6, 0x43, struct lttng_kernel_channel)
	69	#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x44)
	70	#define LTTNG_KERNEL_EVENT \
	71	_IOW(0xF6, 0x45, struct lttng_kernel_event)
	72	#define LTTNG_KERNEL_METADATA \
	73	_IOW(0xF6, 0x46, struct lttng_kernel_channel)
	74	#define LTTNG_KERNEL_KPROBE \
	75	_IOW(0xF6, 0x47, struct lttng_kernel_kprobe)
	76	#define LTTNG_KERNEL_TRACER_VERSION \
	77	_IOR(0xF6, 0x48, struct lttng_kernel_tracer_version)
	78
	79	#endif /* _LTT_DEBUGFS_ABI_H */