[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_TRACEPOINT,
	LTTNG_KERNEL_KPROBE,
	LTTNG_KERNEL_FUNCTION,
};

/*
 * 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 */
};

struct lttng_kernel_tracepoint {
};

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

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_TRACER_VERSION		\
	_IOR(0xF6, 0x47, struct lttng_kernel_tracer_version)

#endif /* _LTT_DEBUGFS_ABI_H */
Commit	Line	Data
57a13317 MD	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
e0a7a7c4	14	#define LTTNG_SYM_NAME_LEN 128
d6d808f3	15
38d024ae	16	enum lttng_kernel_instrumentation {
ab2277d6 MD	17	LTTNG_KERNEL_TRACEPOINT,
	18	LTTNG_KERNEL_KPROBE,
	19	LTTNG_KERNEL_FUNCTION,
57a13317 MD	20	};
	21
	22	/*
	23	* LTTng DebugFS ABI structures.
	24	*/
	25
38d024ae	26	struct lttng_kernel_channel {
9e245ead MD	27	int overwrite; /* 1: overwrite, 0: discard */
9e245ead MD	28	uint64_t subbuf_size; /* in bytes */
80c16bcf	29	uint64_t num_subbuf;
9e245ead MD	30	unsigned int switch_timer_interval; /* usecs */
9e245ead MD	31	unsigned int read_timer_interval; /* usecs */
57a13317 MD	32	};
57a13317 MD	33
30bdb6e4 MD	34	struct lttng_kernel_tracepoint {
	35	};
	36
38d024ae MD	37	/*
	38	* Either addr is used, or symbol_name and offset.
	39	*/
	40	struct lttng_kernel_kprobe {
80c16bcf	41	uint64_t addr;
38d024ae	42
80c16bcf	43	uint64_t offset;
e0a7a7c4	44	char symbol_name[LTTNG_SYM_NAME_LEN];
d6d808f3 MD	45	};
d6d808f3 MD	46
f17701fb	47	struct lttng_kernel_function_tracer {
e0a7a7c4	48	char symbol_name[LTTNG_SYM_NAME_LEN];
f17701fb MD	49	};
f17701fb MD	50
d6d808f3	51	struct lttng_kernel_event {
30bdb6e4	52	char name[LTTNG_SYM_NAME_LEN]; /* event name */
d6d808f3 MD	53	enum lttng_kernel_instrumentation instrumentation;
	54	/* Per instrumentation type configuration */
	55	union {
30bdb6e4	56	struct lttng_kernel_tracepoint tracepoint;
d6d808f3	57	struct lttng_kernel_kprobe kprobe;
f17701fb	58	struct lttng_kernel_function_tracer ftrace;
d6d808f3	59	} u;
38d024ae	60	};
c099397a	61
80c16bcf MD	62	struct lttng_kernel_tracer_version {
	63	uint32_t version;
	64	uint32_t patchlevel;
	65	uint32_t sublevel;
	66	};
	67
ab2277d6 MD	68	#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
	69	#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x41)
	70	#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x42)
	71	#define LTTNG_KERNEL_CHANNEL \
38d024ae	72	_IOW(0xF6, 0x43, struct lttng_kernel_channel)
ab2277d6 MD	73	#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x44)
ab2277d6 MD	74	#define LTTNG_KERNEL_EVENT \
38d024ae	75	_IOW(0xF6, 0x45, struct lttng_kernel_event)
ab2277d6	76	#define LTTNG_KERNEL_METADATA \
38d024ae	77	_IOW(0xF6, 0x46, struct lttng_kernel_channel)
ab2277d6	78	#define LTTNG_KERNEL_TRACER_VERSION \
8ee7866a	79	_IOR(0xF6, 0x47, struct lttng_kernel_tracer_version)
57a13317 MD	80
57a13317 MD	81	#endif /* _LTT_DEBUGFS_ABI_H */