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

/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
 *
 * lttng-abi.h
 *
 * LTTng ABI header
 *
 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 */

#ifndef _LTTNG_ABI_H
#define _LTTNG_ABI_H

#include <linux/fs.h>

/*
 * Major/minor version of ABI exposed to lttng tools. Major number
 * should be increased when an incompatible ABI change is done.
 */
#define LTTNG_MODULES_ABI_MAJOR_VERSION		2
#define LTTNG_MODULES_ABI_MINOR_VERSION		4

#define LTTNG_KERNEL_SYM_NAME_LEN	256
#define LTTNG_KERNEL_SESSION_NAME_LEN	256
#define LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN	26

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_KERNEL_UPROBE	= 6,
};

/*
 * 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 {
	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 */
	int overwrite;				/* 1: overwrite, 0: discard */
	char padding[LTTNG_KERNEL_CHANNEL_PADDING];
} __attribute__((packed));

struct lttng_kernel_kretprobe {
	uint64_t addr;

	uint64_t offset;
	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
} __attribute__((packed));

/*
 * 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];
} __attribute__((packed));

struct lttng_kernel_function_tracer {
	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
} __attribute__((packed));

struct lttng_kernel_uprobe {
	int fd;
} __attribute__((packed));

struct lttng_kernel_event_callsite_uprobe {
	uint64_t offset;
} __attribute__((packed));

struct lttng_kernel_event_callsite {
	union {
		struct lttng_kernel_event_callsite_uprobe uprobe;
	} u;
} __attribute__((packed));

enum lttng_kernel_syscall_entryexit {
	LTTNG_KERNEL_SYSCALL_ENTRYEXIT = 0,
	LTTNG_KERNEL_SYSCALL_ENTRY = 1,		/* Not implemented. */
	LTTNG_KERNEL_SYSCALL_EXIT = 2,		/* Not implemented. */
};

enum lttng_kernel_syscall_abi {
	LTTNG_KERNEL_SYSCALL_ABI_ALL = 0,
	LTTNG_KERNEL_SYSCALL_ABI_NATIVE = 1,	/* Not implemented. */
	LTTNG_KERNEL_SYSCALL_ABI_COMPAT = 2,	/* Not implemented. */
};

enum lttng_kernel_syscall_match {
	LTTNG_SYSCALL_MATCH_NAME = 0,
	LTTNG_SYSCALL_MATCH_NR = 1,		/* Not implemented. */
};

struct lttng_kernel_syscall {
	uint8_t entryexit;	/* enum lttng_kernel_syscall_entryexit */
	uint8_t abi;		/* enum lttng_kernel_syscall_abi */
	uint8_t match;		/* enum lttng_kernel_syscall_match */
	uint8_t padding;
	uint32_t nr;		/* For LTTNG_SYSCALL_MATCH_NR */
} __attribute__((packed));

/*
 * For syscall tracing, name = "*" 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;
		struct lttng_kernel_uprobe uprobe;
		struct lttng_kernel_syscall syscall;
		char padding[LTTNG_KERNEL_EVENT_PADDING2];
	} u;
} __attribute__((packed));

struct lttng_kernel_tracer_version {
	uint32_t major;
	uint32_t minor;
	uint32_t patchlevel;
} __attribute__((packed));

struct lttng_kernel_tracer_abi_version {
	uint32_t major;
	uint32_t minor;
} __attribute__((packed));

struct lttng_kernel_session_name {
	char name[LTTNG_KERNEL_SESSION_NAME_LEN];
} __attribute__((packed));

struct lttng_kernel_session_creation_time {
	char iso8601[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
} __attribute__((packed));

enum lttng_kernel_calibrate_type {
	LTTNG_KERNEL_CALIBRATE_KRETPROBE,
};

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

struct lttng_kernel_syscall_mask {
	uint32_t len;	/* in bits */
	char mask[];
} __attribute__((packed));

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,
	LTTNG_KERNEL_CONTEXT_HOSTNAME		= 10,
	LTTNG_KERNEL_CONTEXT_CPU_ID		= 11,
	LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE	= 12,
	LTTNG_KERNEL_CONTEXT_PREEMPTIBLE	= 13,
	LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE	= 14,
	LTTNG_KERNEL_CONTEXT_MIGRATABLE		= 15,
	LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL	= 16,
	LTTNG_KERNEL_CONTEXT_CALLSTACK_USER	= 17,
};

struct lttng_kernel_perf_counter_ctx {
	uint32_t type;
	uint64_t config;
	char name[LTTNG_KERNEL_SYM_NAME_LEN];
} __attribute__((packed));

#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;
} __attribute__((packed));

#define LTTNG_KERNEL_FILTER_BYTECODE_MAX_LEN		65536
struct lttng_kernel_filter_bytecode {
	uint32_t len;
	uint32_t reloc_offset;
	uint64_t seqnum;
	char data[0];
} __attribute__((packed));

/* LTTng file descriptor ioctl */
#define LTTNG_KERNEL_SESSION			_IO(0xF6, 0x45)
#define LTTNG_KERNEL_TRACER_VERSION		\
	_IOR(0xF6, 0x46, struct lttng_kernel_tracer_version)
#define LTTNG_KERNEL_TRACEPOINT_LIST		_IO(0xF6, 0x47)
#define LTTNG_KERNEL_WAIT_QUIESCENT		_IO(0xF6, 0x48)
#define LTTNG_KERNEL_CALIBRATE			\
	_IOWR(0xF6, 0x49, struct lttng_kernel_calibrate)
#define LTTNG_KERNEL_SYSCALL_LIST		_IO(0xF6, 0x4A)
#define LTTNG_KERNEL_TRACER_ABI_VERSION		\
	_IOR(0xF6, 0x4B, struct lttng_kernel_tracer_abi_version)

/* Session FD ioctl */
#define LTTNG_KERNEL_METADATA			\
	_IOW(0xF6, 0x54, struct lttng_kernel_channel)
#define LTTNG_KERNEL_CHANNEL			\
	_IOW(0xF6, 0x55, struct lttng_kernel_channel)
#define LTTNG_KERNEL_SESSION_START		_IO(0xF6, 0x56)
#define LTTNG_KERNEL_SESSION_STOP		_IO(0xF6, 0x57)
#define LTTNG_KERNEL_SESSION_TRACK_PID		\
	_IOR(0xF6, 0x58, int32_t)
#define LTTNG_KERNEL_SESSION_UNTRACK_PID	\
	_IOR(0xF6, 0x59, int32_t)
/*
 * ioctl 0x58 and 0x59 are duplicated here. It works, since _IOR vs _IO
 * are generating two different ioctl numbers, but this was not done on
 * purpose. We should generally try to avoid those duplications.
 */
#define LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS	_IO(0xF6, 0x58)
#define LTTNG_KERNEL_SESSION_METADATA_REGEN	_IO(0xF6, 0x59)

/* 0x5A and 0x5B are reserved for a future ABI-breaking cleanup. */
#define LTTNG_KERNEL_SESSION_STATEDUMP		_IO(0xF6, 0x5C)
#define LTTNG_KERNEL_SESSION_SET_NAME		\
	_IOR(0xF6, 0x5D, struct lttng_kernel_session_name)
#define LTTNG_KERNEL_SESSION_SET_CREATION_TIME		\
	_IOR(0xF6, 0x5E, struct lttng_kernel_session_creation_time)

/* Channel FD ioctl */
#define LTTNG_KERNEL_STREAM			_IO(0xF6, 0x62)
#define LTTNG_KERNEL_EVENT			\
	_IOW(0xF6, 0x63, struct lttng_kernel_event)
#define LTTNG_KERNEL_SYSCALL_MASK		\
	_IOWR(0xF6, 0x64, struct lttng_kernel_syscall_mask)

/* Event and Channel FD ioctl */
#define LTTNG_KERNEL_CONTEXT			\
	_IOW(0xF6, 0x71, struct lttng_kernel_context)

/* Event, Channel and Session ioctl */
#define LTTNG_KERNEL_ENABLE			_IO(0xF6, 0x82)
#define LTTNG_KERNEL_DISABLE			_IO(0xF6, 0x83)

/* Event FD ioctl */
#define LTTNG_KERNEL_FILTER			_IO(0xF6, 0x90)
#define LTTNG_KERNEL_ADD_CALLSITE		_IO(0xF6, 0x91)

/*
 * LTTng-specific ioctls for the lib ringbuffer.
 *
 * Operations applying to the current sub-buffer need to occur between
 * a get/put or get_next/put_next ioctl pair.
 */

/* returns the timestamp begin of the current sub-buffer */
#define LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN	_IOR(0xF6, 0x20, uint64_t)
/* returns the timestamp end of the current sub-buffer */
#define LTTNG_RING_BUFFER_GET_TIMESTAMP_END	_IOR(0xF6, 0x21, uint64_t)
/* returns the number of events discarded of the current sub-buffer */
#define LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED	_IOR(0xF6, 0x22, uint64_t)
/* returns the packet payload size of the current sub-buffer */
#define LTTNG_RING_BUFFER_GET_CONTENT_SIZE	_IOR(0xF6, 0x23, uint64_t)
/* returns the packet size of the current sub-buffer*/
#define LTTNG_RING_BUFFER_GET_PACKET_SIZE	_IOR(0xF6, 0x24, uint64_t)
/* returns the stream id (invariant for the stream) */
#define LTTNG_RING_BUFFER_GET_STREAM_ID		_IOR(0xF6, 0x25, uint64_t)
/* returns the current timestamp as perceived from the tracer */
#define LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP	_IOR(0xF6, 0x26, uint64_t)
/* returns the packet sequence number of the current sub-buffer */
#define LTTNG_RING_BUFFER_GET_SEQ_NUM		_IOR(0xF6, 0x27, uint64_t)
/* returns the stream instance id (invariant for the stream) */
#define LTTNG_RING_BUFFER_INSTANCE_ID		_IOR(0xF6, 0x28, uint64_t)

#ifdef CONFIG_COMPAT
/* returns the timestamp begin of the current sub-buffer */
#define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_BEGIN \
	LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN
/* returns the timestamp end of the current sub-buffer */
#define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_END \
	LTTNG_RING_BUFFER_GET_TIMESTAMP_END
/* returns the number of events discarded of the current sub-buffer */
#define LTTNG_RING_BUFFER_COMPAT_GET_EVENTS_DISCARDED \
	LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED
/* returns the packet payload size of the current sub-buffer */
#define LTTNG_RING_BUFFER_COMPAT_GET_CONTENT_SIZE \
	LTTNG_RING_BUFFER_GET_CONTENT_SIZE
/* returns the packet size of the current sub-buffer */
#define LTTNG_RING_BUFFER_COMPAT_GET_PACKET_SIZE \
	LTTNG_RING_BUFFER_GET_PACKET_SIZE
/* returns the stream id (invariant for the stream) */
#define LTTNG_RING_BUFFER_COMPAT_GET_STREAM_ID \
	LTTNG_RING_BUFFER_GET_STREAM_ID
/* returns the current timestamp as perceived from the tracer */
#define LTTNG_RING_BUFFER_COMPAT_GET_CURRENT_TIMESTAMP \
	LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP
/* returns the packet sequence number of the current sub-buffer */
#define LTTNG_RING_BUFFER_COMPAT_GET_SEQ_NUM	\
	LTTNG_RING_BUFFER_GET_SEQ_NUM
/* returns the stream instance id (invariant for the stream) */
#define LTTNG_RING_BUFFER_COMPAT_INSTANCE_ID	\
	LTTNG_RING_BUFFER_INSTANCE_ID
#endif /* CONFIG_COMPAT */

#endif /* _LTTNG_ABI_H */
Commit	Line	Data
	1	/* SPDX-License-Identifier: (GPL-2.0 or LGPL-2.1)
	2	*
	3	* lttng-abi.h
	4	*
	5	* LTTng ABI header
	6	*
	7	* Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	8	*/
	9
	10	#ifndef _LTTNG_ABI_H
	11	#define _LTTNG_ABI_H
	12
	13	#include <linux/fs.h>
	14
	15	/*
	16	* Major/minor version of ABI exposed to lttng tools. Major number
	17	* should be increased when an incompatible ABI change is done.
	18	*/
	19	#define LTTNG_MODULES_ABI_MAJOR_VERSION 2
	20	#define LTTNG_MODULES_ABI_MINOR_VERSION 4
	21
	22	#define LTTNG_KERNEL_SYM_NAME_LEN 256
	23	#define LTTNG_KERNEL_SESSION_NAME_LEN 256
	24	#define LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN 26
	25
	26	enum lttng_kernel_instrumentation {
	27	LTTNG_KERNEL_TRACEPOINT = 0,
	28	LTTNG_KERNEL_KPROBE = 1,
	29	LTTNG_KERNEL_FUNCTION = 2,
	30	LTTNG_KERNEL_KRETPROBE = 3,
	31	LTTNG_KERNEL_NOOP = 4, /* not hooked */
	32	LTTNG_KERNEL_SYSCALL = 5,
	33	LTTNG_KERNEL_UPROBE = 6,
	34	};
	35
	36	/*
	37	* LTTng consumer mode
	38	*/
	39	enum lttng_kernel_output {
	40	LTTNG_KERNEL_SPLICE = 0,
	41	LTTNG_KERNEL_MMAP = 1,
	42	};
	43
	44	/*
	45	* LTTng DebugFS ABI structures.
	46	*/
	47	#define LTTNG_KERNEL_CHANNEL_PADDING LTTNG_KERNEL_SYM_NAME_LEN + 32
	48	struct lttng_kernel_channel {
	49	uint64_t subbuf_size; /* in bytes */
	50	uint64_t num_subbuf;
	51	unsigned int switch_timer_interval; /* usecs */
	52	unsigned int read_timer_interval; /* usecs */
	53	enum lttng_kernel_output output; /* splice, mmap */
	54	int overwrite; /* 1: overwrite, 0: discard */
	55	char padding[LTTNG_KERNEL_CHANNEL_PADDING];
	56	} __attribute__((packed));
	57
	58	struct lttng_kernel_kretprobe {
	59	uint64_t addr;
	60
	61	uint64_t offset;
	62	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
	63	} __attribute__((packed));
	64
	65	/*
	66	* Either addr is used, or symbol_name and offset.
	67	*/
	68	struct lttng_kernel_kprobe {
	69	uint64_t addr;
	70
	71	uint64_t offset;
	72	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
	73	} __attribute__((packed));
	74
	75	struct lttng_kernel_function_tracer {
	76	char symbol_name[LTTNG_KERNEL_SYM_NAME_LEN];
	77	} __attribute__((packed));
	78
	79	struct lttng_kernel_uprobe {
	80	int fd;
	81	} __attribute__((packed));
	82
	83	struct lttng_kernel_event_callsite_uprobe {
	84	uint64_t offset;
	85	} __attribute__((packed));
	86
	87	struct lttng_kernel_event_callsite {
	88	union {
	89	struct lttng_kernel_event_callsite_uprobe uprobe;
	90	} u;
	91	} __attribute__((packed));
	92
	93	enum lttng_kernel_syscall_entryexit {
	94	LTTNG_KERNEL_SYSCALL_ENTRYEXIT = 0,
	95	LTTNG_KERNEL_SYSCALL_ENTRY = 1, /* Not implemented. */
	96	LTTNG_KERNEL_SYSCALL_EXIT = 2, /* Not implemented. */
	97	};
	98
	99	enum lttng_kernel_syscall_abi {
	100	LTTNG_KERNEL_SYSCALL_ABI_ALL = 0,
	101	LTTNG_KERNEL_SYSCALL_ABI_NATIVE = 1, /* Not implemented. */
	102	LTTNG_KERNEL_SYSCALL_ABI_COMPAT = 2, /* Not implemented. */
	103	};
	104
	105	enum lttng_kernel_syscall_match {
	106	LTTNG_SYSCALL_MATCH_NAME = 0,
	107	LTTNG_SYSCALL_MATCH_NR = 1, /* Not implemented. */
	108	};
	109
	110	struct lttng_kernel_syscall {
	111	uint8_t entryexit; /* enum lttng_kernel_syscall_entryexit */
	112	uint8_t abi; /* enum lttng_kernel_syscall_abi */
	113	uint8_t match; /* enum lttng_kernel_syscall_match */
	114	uint8_t padding;
	115	uint32_t nr; /* For LTTNG_SYSCALL_MATCH_NR */
	116	} __attribute__((packed));
	117
	118	/*
	119	* For syscall tracing, name = "*" means "enable all".
	120	*/
	121	#define LTTNG_KERNEL_EVENT_PADDING1 16
	122	#define LTTNG_KERNEL_EVENT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
	123	struct lttng_kernel_event {
	124	char name[LTTNG_KERNEL_SYM_NAME_LEN]; /* event name */
	125	enum lttng_kernel_instrumentation instrumentation;
	126	char padding[LTTNG_KERNEL_EVENT_PADDING1];
	127
	128	/* Per instrumentation type configuration */
	129	union {
	130	struct lttng_kernel_kretprobe kretprobe;
	131	struct lttng_kernel_kprobe kprobe;
	132	struct lttng_kernel_function_tracer ftrace;
	133	struct lttng_kernel_uprobe uprobe;
	134	struct lttng_kernel_syscall syscall;
	135	char padding[LTTNG_KERNEL_EVENT_PADDING2];
	136	} u;
	137	} __attribute__((packed));
	138
	139	struct lttng_kernel_tracer_version {
	140	uint32_t major;
	141	uint32_t minor;
	142	uint32_t patchlevel;
	143	} __attribute__((packed));
	144
	145	struct lttng_kernel_tracer_abi_version {
	146	uint32_t major;
	147	uint32_t minor;
	148	} __attribute__((packed));
	149
	150	struct lttng_kernel_session_name {
	151	char name[LTTNG_KERNEL_SESSION_NAME_LEN];
	152	} __attribute__((packed));
	153
	154	struct lttng_kernel_session_creation_time {
	155	char iso8601[LTTNG_KERNEL_SESSION_CREATION_TIME_ISO8601_LEN];
	156	} __attribute__((packed));
	157
	158	enum lttng_kernel_calibrate_type {
	159	LTTNG_KERNEL_CALIBRATE_KRETPROBE,
	160	};
	161
	162	struct lttng_kernel_calibrate {
	163	enum lttng_kernel_calibrate_type type; /* type (input) */
	164	} __attribute__((packed));
	165
	166	struct lttng_kernel_syscall_mask {
	167	uint32_t len; /* in bits */
	168	char mask[];
	169	} __attribute__((packed));
	170
	171	enum lttng_kernel_context_type {
	172	LTTNG_KERNEL_CONTEXT_PID = 0,
	173	LTTNG_KERNEL_CONTEXT_PERF_COUNTER = 1,
	174	LTTNG_KERNEL_CONTEXT_PROCNAME = 2,
	175	LTTNG_KERNEL_CONTEXT_PRIO = 3,
	176	LTTNG_KERNEL_CONTEXT_NICE = 4,
	177	LTTNG_KERNEL_CONTEXT_VPID = 5,
	178	LTTNG_KERNEL_CONTEXT_TID = 6,
	179	LTTNG_KERNEL_CONTEXT_VTID = 7,
	180	LTTNG_KERNEL_CONTEXT_PPID = 8,
	181	LTTNG_KERNEL_CONTEXT_VPPID = 9,
	182	LTTNG_KERNEL_CONTEXT_HOSTNAME = 10,
	183	LTTNG_KERNEL_CONTEXT_CPU_ID = 11,
	184	LTTNG_KERNEL_CONTEXT_INTERRUPTIBLE = 12,
	185	LTTNG_KERNEL_CONTEXT_PREEMPTIBLE = 13,
	186	LTTNG_KERNEL_CONTEXT_NEED_RESCHEDULE = 14,
	187	LTTNG_KERNEL_CONTEXT_MIGRATABLE = 15,
	188	LTTNG_KERNEL_CONTEXT_CALLSTACK_KERNEL = 16,
	189	LTTNG_KERNEL_CONTEXT_CALLSTACK_USER = 17,
	190	};
	191
	192	struct lttng_kernel_perf_counter_ctx {
	193	uint32_t type;
	194	uint64_t config;
	195	char name[LTTNG_KERNEL_SYM_NAME_LEN];
	196	} __attribute__((packed));
	197
	198	#define LTTNG_KERNEL_CONTEXT_PADDING1 16
	199	#define LTTNG_KERNEL_CONTEXT_PADDING2 LTTNG_KERNEL_SYM_NAME_LEN + 32
	200	struct lttng_kernel_context {
	201	enum lttng_kernel_context_type ctx;
	202	char padding[LTTNG_KERNEL_CONTEXT_PADDING1];
	203
	204	union {
	205	struct lttng_kernel_perf_counter_ctx perf_counter;
	206	char padding[LTTNG_KERNEL_CONTEXT_PADDING2];
	207	} u;
	208	} __attribute__((packed));
	209
	210	#define LTTNG_KERNEL_FILTER_BYTECODE_MAX_LEN 65536
	211	struct lttng_kernel_filter_bytecode {
	212	uint32_t len;
	213	uint32_t reloc_offset;
	214	uint64_t seqnum;
	215	char data[0];
	216	} __attribute__((packed));
	217
	218	/* LTTng file descriptor ioctl */
	219	#define LTTNG_KERNEL_SESSION _IO(0xF6, 0x45)
	220	#define LTTNG_KERNEL_TRACER_VERSION \
	221	_IOR(0xF6, 0x46, struct lttng_kernel_tracer_version)
	222	#define LTTNG_KERNEL_TRACEPOINT_LIST _IO(0xF6, 0x47)
	223	#define LTTNG_KERNEL_WAIT_QUIESCENT _IO(0xF6, 0x48)
	224	#define LTTNG_KERNEL_CALIBRATE \
	225	_IOWR(0xF6, 0x49, struct lttng_kernel_calibrate)
	226	#define LTTNG_KERNEL_SYSCALL_LIST _IO(0xF6, 0x4A)
	227	#define LTTNG_KERNEL_TRACER_ABI_VERSION \
	228	_IOR(0xF6, 0x4B, struct lttng_kernel_tracer_abi_version)
	229
	230	/* Session FD ioctl */
	231	#define LTTNG_KERNEL_METADATA \
	232	_IOW(0xF6, 0x54, struct lttng_kernel_channel)
	233	#define LTTNG_KERNEL_CHANNEL \
	234	_IOW(0xF6, 0x55, struct lttng_kernel_channel)
	235	#define LTTNG_KERNEL_SESSION_START _IO(0xF6, 0x56)
	236	#define LTTNG_KERNEL_SESSION_STOP _IO(0xF6, 0x57)
	237	#define LTTNG_KERNEL_SESSION_TRACK_PID \
	238	_IOR(0xF6, 0x58, int32_t)
	239	#define LTTNG_KERNEL_SESSION_UNTRACK_PID \
	240	_IOR(0xF6, 0x59, int32_t)
	241	/*
	242	* ioctl 0x58 and 0x59 are duplicated here. It works, since _IOR vs _IO
	243	* are generating two different ioctl numbers, but this was not done on
	244	* purpose. We should generally try to avoid those duplications.
	245	*/
	246	#define LTTNG_KERNEL_SESSION_LIST_TRACKER_PIDS _IO(0xF6, 0x58)
	247	#define LTTNG_KERNEL_SESSION_METADATA_REGEN _IO(0xF6, 0x59)
	248
	249	/* 0x5A and 0x5B are reserved for a future ABI-breaking cleanup. */
	250	#define LTTNG_KERNEL_SESSION_STATEDUMP _IO(0xF6, 0x5C)
	251	#define LTTNG_KERNEL_SESSION_SET_NAME \
	252	_IOR(0xF6, 0x5D, struct lttng_kernel_session_name)
	253	#define LTTNG_KERNEL_SESSION_SET_CREATION_TIME \
	254	_IOR(0xF6, 0x5E, struct lttng_kernel_session_creation_time)
	255
	256	/* Channel FD ioctl */
	257	#define LTTNG_KERNEL_STREAM _IO(0xF6, 0x62)
	258	#define LTTNG_KERNEL_EVENT \
	259	_IOW(0xF6, 0x63, struct lttng_kernel_event)
	260	#define LTTNG_KERNEL_SYSCALL_MASK \
	261	_IOWR(0xF6, 0x64, struct lttng_kernel_syscall_mask)
	262
	263	/* Event and Channel FD ioctl */
	264	#define LTTNG_KERNEL_CONTEXT \
	265	_IOW(0xF6, 0x71, struct lttng_kernel_context)
	266
	267	/* Event, Channel and Session ioctl */
	268	#define LTTNG_KERNEL_ENABLE _IO(0xF6, 0x82)
	269	#define LTTNG_KERNEL_DISABLE _IO(0xF6, 0x83)
	270
	271	/* Event FD ioctl */
	272	#define LTTNG_KERNEL_FILTER _IO(0xF6, 0x90)
	273	#define LTTNG_KERNEL_ADD_CALLSITE _IO(0xF6, 0x91)
	274
	275	/*
	276	* LTTng-specific ioctls for the lib ringbuffer.
	277	*
	278	* Operations applying to the current sub-buffer need to occur between
	279	* a get/put or get_next/put_next ioctl pair.
	280	*/
	281
	282	/* returns the timestamp begin of the current sub-buffer */
	283	#define LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN _IOR(0xF6, 0x20, uint64_t)
	284	/* returns the timestamp end of the current sub-buffer */
	285	#define LTTNG_RING_BUFFER_GET_TIMESTAMP_END _IOR(0xF6, 0x21, uint64_t)
	286	/* returns the number of events discarded of the current sub-buffer */
	287	#define LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED _IOR(0xF6, 0x22, uint64_t)
	288	/* returns the packet payload size of the current sub-buffer */
	289	#define LTTNG_RING_BUFFER_GET_CONTENT_SIZE _IOR(0xF6, 0x23, uint64_t)
	290	/* returns the packet size of the current sub-buffer*/
	291	#define LTTNG_RING_BUFFER_GET_PACKET_SIZE _IOR(0xF6, 0x24, uint64_t)
	292	/* returns the stream id (invariant for the stream) */
	293	#define LTTNG_RING_BUFFER_GET_STREAM_ID _IOR(0xF6, 0x25, uint64_t)
	294	/* returns the current timestamp as perceived from the tracer */
	295	#define LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP _IOR(0xF6, 0x26, uint64_t)
	296	/* returns the packet sequence number of the current sub-buffer */
	297	#define LTTNG_RING_BUFFER_GET_SEQ_NUM _IOR(0xF6, 0x27, uint64_t)
	298	/* returns the stream instance id (invariant for the stream) */
	299	#define LTTNG_RING_BUFFER_INSTANCE_ID _IOR(0xF6, 0x28, uint64_t)
	300
	301	#ifdef CONFIG_COMPAT
	302	/* returns the timestamp begin of the current sub-buffer */
	303	#define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_BEGIN \
	304	LTTNG_RING_BUFFER_GET_TIMESTAMP_BEGIN
	305	/* returns the timestamp end of the current sub-buffer */
	306	#define LTTNG_RING_BUFFER_COMPAT_GET_TIMESTAMP_END \
	307	LTTNG_RING_BUFFER_GET_TIMESTAMP_END
	308	/* returns the number of events discarded of the current sub-buffer */
	309	#define LTTNG_RING_BUFFER_COMPAT_GET_EVENTS_DISCARDED \
	310	LTTNG_RING_BUFFER_GET_EVENTS_DISCARDED
	311	/* returns the packet payload size of the current sub-buffer */
	312	#define LTTNG_RING_BUFFER_COMPAT_GET_CONTENT_SIZE \
	313	LTTNG_RING_BUFFER_GET_CONTENT_SIZE
	314	/* returns the packet size of the current sub-buffer */
	315	#define LTTNG_RING_BUFFER_COMPAT_GET_PACKET_SIZE \
	316	LTTNG_RING_BUFFER_GET_PACKET_SIZE
	317	/* returns the stream id (invariant for the stream) */
	318	#define LTTNG_RING_BUFFER_COMPAT_GET_STREAM_ID \
	319	LTTNG_RING_BUFFER_GET_STREAM_ID
	320	/* returns the current timestamp as perceived from the tracer */
	321	#define LTTNG_RING_BUFFER_COMPAT_GET_CURRENT_TIMESTAMP \
	322	LTTNG_RING_BUFFER_GET_CURRENT_TIMESTAMP
	323	/* returns the packet sequence number of the current sub-buffer */
	324	#define LTTNG_RING_BUFFER_COMPAT_GET_SEQ_NUM \
	325	LTTNG_RING_BUFFER_GET_SEQ_NUM
	326	/* returns the stream instance id (invariant for the stream) */
	327	#define LTTNG_RING_BUFFER_COMPAT_INSTANCE_ID \
	328	LTTNG_RING_BUFFER_INSTANCE_ID
	329	#endif /* CONFIG_COMPAT */
	330
	331	#endif /* _LTTNG_ABI_H */