[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_KPROBE_SYM_NAME_LEN	128

enum lttng_kernel_instrumentation {
	LTTNG_KERNEL_TRACEPOINTS,
	LTTNG_KERNEL_KPROBES,
};

/*
 * LTTng DebugFS ABI structures.
 */

struct lttng_kernel_channel {
	int overwrite;			/* 1: overwrite, 0: discard */
	uint64_t subbuf_size;
	uint64_t num_subbuf;
	unsigned int switch_timer_interval;
	unsigned int read_timer_interval;
};

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

	uint64_t offset;
	char symbol_name[LTTNG_KPROBE_SYM_NAME_LEN];
};

struct lttng_kernel_event {
	enum lttng_kernel_instrumentation instrumentation;
	/* Per instrumentation type configuration */
	union {
		struct lttng_kernel_kprobe kprobe;
	} u;
	char 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
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
d6d808f3 MD	14	#define LTTNG_KPROBE_SYM_NAME_LEN 128
d6d808f3 MD	15
38d024ae MD	16	enum lttng_kernel_instrumentation {
	17	LTTNG_KERNEL_TRACEPOINTS,
	18	LTTNG_KERNEL_KPROBES,
57a13317 MD	19	};
	20
	21	/*
	22	* LTTng DebugFS ABI structures.
	23	*/
	24
38d024ae	25	struct lttng_kernel_channel {
57a13317	26	int overwrite; /* 1: overwrite, 0: discard */
80c16bcf MD	27	uint64_t subbuf_size;
80c16bcf MD	28	uint64_t num_subbuf;
57a13317 MD	29	unsigned int switch_timer_interval;
	30	unsigned int read_timer_interval;
	31	};
	32
38d024ae MD	33	/*
	34	* Either addr is used, or symbol_name and offset.
	35	*/
	36	struct lttng_kernel_kprobe {
80c16bcf	37	uint64_t addr;
38d024ae	38
80c16bcf	39	uint64_t offset;
d6d808f3 MD	40	char symbol_name[LTTNG_KPROBE_SYM_NAME_LEN];
	41	};
	42
	43	struct lttng_kernel_event {
	44	enum lttng_kernel_instrumentation instrumentation;
	45	/* Per instrumentation type configuration */
	46	union {
	47	struct lttng_kernel_kprobe kprobe;
	48	} u;
	49	char name[];
38d024ae	50	};
c099397a	51
80c16bcf MD	52	struct lttng_kernel_tracer_version {
	53	uint32_t version;
	54	uint32_t patchlevel;
	55	uint32_t sublevel;
	56	};
	57
38d024ae MD	58	#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
	59	#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x41)
	60	#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x42)
	61	#define LTTNG_KERNEL_CHANNEL \
	62	_IOW(0xF6, 0x43, struct lttng_kernel_channel)
	63	#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x44)
	64	#define LTTNG_KERNEL_EVENT \
	65	_IOW(0xF6, 0x45, struct lttng_kernel_event)
	66	#define LTTNG_KERNEL_METADATA \
	67	_IOW(0xF6, 0x46, struct lttng_kernel_channel)
	68	#define LTTNG_KERNEL_KPROBE \
	69	_IOW(0xF6, 0x47, struct lttng_kernel_kprobe)
	70	#define LTTNG_KERNEL_TRACER_VERSION \
80c16bcf	71	_IOR(0xF6, 0x48, struct lttng_kernel_tracer_version)
57a13317 MD	72
57a13317 MD	73	#endif /* _LTT_DEBUGFS_ABI_H */