[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 */
};

/*
 * 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_kprobe kprobe;
		struct lttng_kernel_function_tracer ftrace;
	} u;
};

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

enum lttng_kernel_context_type {
	LTTNG_KERNEL_CONTEXT_PID,
	LTTNG_KERNEL_CONTEXT_PERF_COUNTER,
	LTTNG_KERNEL_CONTEXT_COMM,
};

struct lttng_kernel_perf_counter_ctx {
	uint32_t type;
	uint64_t config;
};

struct lttng_kernel_context {
	enum lttng_kernel_context_type ctx;
	union {
		struct lttng_kernel_perf_counter_ctx perf_counter;
	} 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)

/* 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)

#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_TRACEPOINT,
	18	LTTNG_KERNEL_KPROBE,
	19	LTTNG_KERNEL_FUNCTION,
	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	char name[LTTNG_SYM_NAME_LEN]; /* event name */
	50	enum lttng_kernel_instrumentation instrumentation;
	51	/* Per instrumentation type configuration */
	52	union {
	53	struct lttng_kernel_kprobe kprobe;
	54	struct lttng_kernel_function_tracer ftrace;
	55	} u;
	56	};
	57
	58	struct lttng_kernel_tracer_version {
	59	uint32_t version;
	60	uint32_t patchlevel;
	61	uint32_t sublevel;
	62	};
	63
	64	enum lttng_kernel_context_type {
	65	LTTNG_KERNEL_CONTEXT_PID,
	66	LTTNG_KERNEL_CONTEXT_PERF_COUNTER,
	67	LTTNG_KERNEL_CONTEXT_COMM,
	68	};
	69
	70	struct lttng_kernel_perf_counter_ctx {
	71	uint32_t type;
	72	uint64_t config;
	73	};
	74
	75	struct lttng_kernel_context {
	76	enum lttng_kernel_context_type ctx;
	77	union {
	78	struct lttng_kernel_perf_counter_ctx perf_counter;
	79	} u;
	80	};
	81
	82	/* LTTng file descriptor ioctl */
	83	#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x40)
	84	#define LTTNG_KERNEL_TRACER_VERSION \
	85	_IOR(0xF6, 0x41, struct lttng_kernel_tracer_version)
	86	#define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x42)
	87
	88	/* Session FD ioctl */
	89	#define LTTNG_KERNEL_METADATA \
	90	_IOW(0xF6, 0x50, struct lttng_kernel_channel)
	91	#define LTTNG_KERNEL_CHANNEL \
	92	_IOW(0xF6, 0x51, struct lttng_kernel_channel)
	93	#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x52)
	94	#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x53)
	95
	96	/* Channel FD ioctl */
	97	#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x60)
	98	#define LTTNG_KERNEL_EVENT \
	99	_IOW(0xF6, 0x61, struct lttng_kernel_event)
	100
	101	/* Event and Channel FD ioctl */
	102	#define LTTNG_KERNEL_CONTEXT \
	103	_IOW(0xF6, 0x70, struct lttng_kernel_context)
	104
	105	#endif /* _LTT_DEBUGFS_ABI_H */