[lttng-tools.git] / src / common / lttng-kernel.hpp

/*
 * Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 * Copyright (C) 2011 EfficiOS Inc.
 *
 * SPDX-License-Identifier: GPL-2.0-only
 *
 */

#ifndef _LTTNG_KERNEL_H
#define _LTTNG_KERNEL_H

#include <common/compiler.hpp>
#include <common/macros.hpp>

#include <lttng/constant.h>
#include <lttng/event.h>

#include <stdint.h>

#define LTTNG_KERNEL_ABI_SYM_NAME_LEN			   256
#define LTTNG_KERNEL_ABI_MAX_UPROBE_NUM			   32
#define LTTNG_KERNEL_ABI_SESSION_NAME_LEN		   256
#define LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN 26

/*
 * LTTng DebugFS ABI structures.
 *
 * This is the kernel ABI copied from lttng-modules tree.
 */

enum lttng_kernel_abi_instrumentation {
	LTTNG_KERNEL_ABI_ALL = -1, /* Used within lttng-tools */
	LTTNG_KERNEL_ABI_TRACEPOINT = 0,
	LTTNG_KERNEL_ABI_KPROBE = 1,
	LTTNG_KERNEL_ABI_FUNCTION = 2,
	LTTNG_KERNEL_ABI_KRETPROBE = 3,
	LTTNG_KERNEL_ABI_NOOP = 4, /* not hooked */
	LTTNG_KERNEL_ABI_SYSCALL = 5,
	LTTNG_KERNEL_ABI_UPROBE = 6,
};

enum lttng_kernel_abi_context_type {
	LTTNG_KERNEL_ABI_CONTEXT_PID = 0,
	LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER = 1,
	LTTNG_KERNEL_ABI_CONTEXT_PROCNAME = 2,
	LTTNG_KERNEL_ABI_CONTEXT_PRIO = 3,
	LTTNG_KERNEL_ABI_CONTEXT_NICE = 4,
	LTTNG_KERNEL_ABI_CONTEXT_VPID = 5,
	LTTNG_KERNEL_ABI_CONTEXT_TID = 6,
	LTTNG_KERNEL_ABI_CONTEXT_VTID = 7,
	LTTNG_KERNEL_ABI_CONTEXT_PPID = 8,
	LTTNG_KERNEL_ABI_CONTEXT_VPPID = 9,
	LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME = 10,
	LTTNG_KERNEL_ABI_CONTEXT_CPU_ID = 11,
	LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE = 12,
	LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE = 13,
	LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE = 14,
	LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE = 15,
	LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL = 16,
	LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER = 17,
	LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS = 18,
	LTTNG_KERNEL_ABI_CONTEXT_IPC_NS = 19,
	LTTNG_KERNEL_ABI_CONTEXT_MNT_NS = 20,
	LTTNG_KERNEL_ABI_CONTEXT_NET_NS = 21,
	LTTNG_KERNEL_ABI_CONTEXT_PID_NS = 22,
	LTTNG_KERNEL_ABI_CONTEXT_USER_NS = 23,
	LTTNG_KERNEL_ABI_CONTEXT_UTS_NS = 24,
	LTTNG_KERNEL_ABI_CONTEXT_UID = 25,
	LTTNG_KERNEL_ABI_CONTEXT_EUID = 26,
	LTTNG_KERNEL_ABI_CONTEXT_SUID = 27,
	LTTNG_KERNEL_ABI_CONTEXT_GID = 28,
	LTTNG_KERNEL_ABI_CONTEXT_EGID = 29,
	LTTNG_KERNEL_ABI_CONTEXT_SGID = 30,
	LTTNG_KERNEL_ABI_CONTEXT_VUID = 31,
	LTTNG_KERNEL_ABI_CONTEXT_VEUID = 32,
	LTTNG_KERNEL_ABI_CONTEXT_VSUID = 33,
	LTTNG_KERNEL_ABI_CONTEXT_VGID = 34,
	LTTNG_KERNEL_ABI_CONTEXT_VEGID = 35,
	LTTNG_KERNEL_ABI_CONTEXT_VSGID = 36,
	LTTNG_KERNEL_ABI_CONTEXT_TIME_NS = 37,
};

/* Perf counter attributes */
struct lttng_kernel_abi_perf_counter_ctx {
	uint32_t type;
	uint64_t config;
	char name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
} LTTNG_PACKED;

/* Event/Channel context */
#define LTTNG_KERNEL_ABI_CONTEXT_PADDING1 16
#define LTTNG_KERNEL_ABI_CONTEXT_PADDING2 ((LTTNG_KERNEL_ABI_SYM_NAME_LEN + 32))
struct lttng_kernel_abi_context {
	enum lttng_kernel_abi_context_type ctx;
	char padding[LTTNG_KERNEL_ABI_CONTEXT_PADDING1];

	union {
		struct lttng_kernel_abi_perf_counter_ctx perf_counter;
		char padding[LTTNG_KERNEL_ABI_CONTEXT_PADDING2];
	} u;
} LTTNG_PACKED;

struct lttng_kernel_abi_kretprobe {
	uint64_t addr;

	uint64_t offset;
	char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
} LTTNG_PACKED;

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

	uint64_t offset;
	char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
} LTTNG_PACKED;

struct lttng_kernel_abi_uprobe {
	int fd;
} LTTNG_PACKED;

struct lttng_kernel_abi_event_callsite_uprobe {
	uint64_t offset;
} LTTNG_PACKED;

struct lttng_kernel_abi_event_callsite {
	union {
		struct lttng_kernel_abi_event_callsite_uprobe uprobe;
	} u;
} LTTNG_PACKED;

enum lttng_kernel_abi_syscall_entryexit {
	LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT = 0,
	LTTNG_KERNEL_ABI_SYSCALL_ENTRY = 1,
	LTTNG_KERNEL_ABI_SYSCALL_EXIT = 2,
};

enum lttng_kernel_abi_syscall_abi {
	LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL = 0,
	LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE = 1,
	LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT = 2,
};

enum lttng_kernel_abi_syscall_match {
	LTTNG_KERNEL_ABI_SYSCALL_MATCH_NAME = 0,
	LTTNG_KERNEL_ABI_SYSCALL_MATCH_NR = 1,
};

struct lttng_kernel_abi_syscall {
	uint8_t entryexit; /* enum lttng_kernel_abi_syscall_entryexit */
	uint8_t abi; /* enum lttng_kernel_abi_syscall_abi */
	uint8_t match; /* enum lttng_kernel_abi_syscall_match */
	uint8_t padding;
	uint32_t nr; /* For LTTNG_SYSCALL_MATCH_NR */
} LTTNG_PACKED;

/* Function tracer */
struct lttng_kernel_abi_function {
	char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
} LTTNG_PACKED;

#define LTTNG_KERNEL_ABI_EVENT_PADDING1 8
#define LTTNG_KERNEL_ABI_EVENT_PADDING2 ((LTTNG_KERNEL_ABI_SYM_NAME_LEN + 32))
struct lttng_kernel_abi_event {
	char name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
	enum lttng_kernel_abi_instrumentation instrumentation;
	uint64_t token;
	char padding[LTTNG_KERNEL_ABI_EVENT_PADDING1];

	/* Per instrumentation type configuration */
	union {
		struct lttng_kernel_abi_kretprobe kretprobe;
		struct lttng_kernel_abi_kprobe kprobe;
		struct lttng_kernel_abi_function ftrace;
		struct lttng_kernel_abi_uprobe uprobe;
		struct lttng_kernel_abi_syscall syscall;
		char padding[LTTNG_KERNEL_ABI_EVENT_PADDING2];
	} u;
} LTTNG_PACKED;

#define LTTNG_KERNEL_ABI_EVENT_NOTIFIER_PADDING 32
struct lttng_kernel_abi_event_notifier {
	struct lttng_kernel_abi_event event;
	uint64_t error_counter_idx;

	char padding[LTTNG_KERNEL_ABI_EVENT_NOTIFIER_PADDING];
} LTTNG_PACKED;

#define LTTNG_KERNEL_ABI_COUNTER_DIMENSION_MAX 4

enum lttng_kernel_abi_counter_arithmetic {
	LTTNG_KERNEL_ABI_COUNTER_ARITHMETIC_MODULAR = 0,
};

enum lttng_kernel_abi_counter_bitness {
	LTTNG_KERNEL_ABI_COUNTER_BITNESS_32 = 0,
	LTTNG_KERNEL_ABI_COUNTER_BITNESS_64 = 1,
};

struct lttng_kernel_abi_counter_dimension {
	uint64_t size;
	uint64_t underflow_index;
	uint64_t overflow_index;
	uint8_t has_underflow;
	uint8_t has_overflow;
} LTTNG_PACKED;

#define LTTNG_KERNEL_ABI_COUNTER_CONF_PADDING1 67
struct lttng_kernel_abi_counter_conf {
	uint32_t arithmetic; /* enum lttng_kernel_abi_counter_arithmetic */
	uint32_t bitness; /* enum lttng_kernel_abi_counter_bitness */
	uint32_t number_dimensions;
	int64_t global_sum_step;
	struct lttng_kernel_abi_counter_dimension dimensions[LTTNG_KERNEL_ABI_COUNTER_DIMENSION_MAX];
	uint8_t coalesce_hits;
	char padding[LTTNG_KERNEL_ABI_COUNTER_CONF_PADDING1];
} LTTNG_PACKED;

struct lttng_kernel_abi_counter_index {
	uint32_t number_dimensions;
	uint64_t dimension_indexes[LTTNG_KERNEL_ABI_COUNTER_DIMENSION_MAX];
} LTTNG_PACKED;

struct lttng_kernel_abi_counter_value {
	int64_t value;
	uint8_t underflow;
	uint8_t overflow;
} LTTNG_PACKED;

#define LTTNG_KERNEL_ABI_COUNTER_READ_PADDING 32
struct lttng_kernel_abi_counter_read {
	struct lttng_kernel_abi_counter_index index;
	int32_t cpu; /* -1 for global counter, >= 0 for specific cpu. */
	struct lttng_kernel_abi_counter_value value; /* output */
	char padding[LTTNG_KERNEL_ABI_COUNTER_READ_PADDING];
} LTTNG_PACKED;

#define LTTNG_KERNEL_ABI_COUNTER_AGGREGATE_PADDING 32
struct lttng_kernel_abi_counter_aggregate {
	struct lttng_kernel_abi_counter_index index;
	struct lttng_kernel_abi_counter_value value; /* output */
	char padding[LTTNG_KERNEL_ABI_COUNTER_AGGREGATE_PADDING];
} LTTNG_PACKED;

#define LTTNG_KERNEL_ABI_COUNTER_CLEAR_PADDING 32
struct lttng_kernel_abi_counter_clear {
	struct lttng_kernel_abi_counter_index index;
	char padding[LTTNG_KERNEL_ABI_COUNTER_CLEAR_PADDING];
} LTTNG_PACKED;

#define LTTNG_KERNEL_ABI_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
struct lttng_kernel_abi_event_notifier_notification {
	uint64_t token;
	uint16_t capture_buf_size;
	char padding[LTTNG_KERNEL_ABI_EVENT_NOTIFIER_NOTIFICATION_PADDING];
} LTTNG_PACKED;

#define LTTNG_KERNEL_ABI_CAPTURE_BYTECODE_MAX_LEN 65536
struct lttng_kernel_abi_capture_bytecode {
	uint32_t len;
	uint32_t reloc_offset;
	uint64_t seqnum;
	char data[0];
} LTTNG_PACKED;

struct lttng_kernel_abi_tracer_version {
	uint32_t major;
	uint32_t minor;
	uint32_t patchlevel;
} LTTNG_PACKED;

struct lttng_kernel_abi_tracer_abi_version {
	uint32_t major;
	uint32_t minor;
} LTTNG_PACKED;

struct lttng_kernel_abi_syscall_mask {
	uint32_t len; /* in bits */
	char mask[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
} LTTNG_PACKED;

/*
 * kernel channel
 */
#define LTTNG_KERNEL_ABI_CHANNEL_PADDING1 ((LTTNG_SYMBOL_NAME_LEN + 32))
struct lttng_kernel_abi_channel {
	uint64_t subbuf_size; /* bytes */
	uint64_t num_subbuf; /* power of 2 */
	unsigned int switch_timer_interval; /* usec */
	unsigned int read_timer_interval; /* usec */
	enum lttng_event_output output; /* splice, mmap */

	int overwrite; /* 1: overwrite, 0: discard */
	char padding[LTTNG_KERNEL_ABI_CHANNEL_PADDING1];
} LTTNG_PACKED;

#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
struct lttng_kernel_abi_filter_bytecode {
	uint32_t len;
	uint32_t reloc_offset;
	uint64_t seqnum;
	char data[0];
} LTTNG_PACKED;

/*
 * kernel session name
 */
struct lttng_kernel_abi_session_name {
	char name[LTTNG_KERNEL_ABI_SESSION_NAME_LEN];
} LTTNG_PACKED;

/*
 * kernel session creation datetime
 */
struct lttng_kernel_abi_session_creation_time {
	char iso8601[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN];
} LTTNG_PACKED;

enum lttng_kernel_abi_tracker_type {
	LTTNG_KERNEL_ABI_TRACKER_UNKNOWN = -1,

	LTTNG_KERNEL_ABI_TRACKER_PID = 0,
	LTTNG_KERNEL_ABI_TRACKER_VPID = 1,
	LTTNG_KERNEL_ABI_TRACKER_UID = 2,
	LTTNG_KERNEL_ABI_TRACKER_VUID = 3,
	LTTNG_KERNEL_ABI_TRACKER_GID = 4,
	LTTNG_KERNEL_ABI_TRACKER_VGID = 5,
};

struct lttng_kernel_abi_tracker_args {
	enum lttng_kernel_abi_tracker_type type;
	int32_t id;
};

#endif /* _LTTNG_KERNEL_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	3	* Copyright (C) 2011 EfficiOS Inc.
	4	*
	5	* SPDX-License-Identifier: GPL-2.0-only
	6	*
	7	*/
	8
	9	#ifndef _LTTNG_KERNEL_H
	10	#define _LTTNG_KERNEL_H
	11
	12	#include <common/compiler.hpp>
	13	#include <common/macros.hpp>
	14
	15	#include <lttng/constant.h>
	16	#include <lttng/event.h>
	17
	18	#include <stdint.h>
	19
	20	#define LTTNG_KERNEL_ABI_SYM_NAME_LEN 256
	21	#define LTTNG_KERNEL_ABI_MAX_UPROBE_NUM 32
	22	#define LTTNG_KERNEL_ABI_SESSION_NAME_LEN 256
	23	#define LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN 26
	24
	25	/*
	26	* LTTng DebugFS ABI structures.
	27	*
	28	* This is the kernel ABI copied from lttng-modules tree.
	29	*/
	30
	31	enum lttng_kernel_abi_instrumentation {
	32	LTTNG_KERNEL_ABI_ALL = -1, /* Used within lttng-tools */
	33	LTTNG_KERNEL_ABI_TRACEPOINT = 0,
	34	LTTNG_KERNEL_ABI_KPROBE = 1,
	35	LTTNG_KERNEL_ABI_FUNCTION = 2,
	36	LTTNG_KERNEL_ABI_KRETPROBE = 3,
	37	LTTNG_KERNEL_ABI_NOOP = 4, /* not hooked */
	38	LTTNG_KERNEL_ABI_SYSCALL = 5,
	39	LTTNG_KERNEL_ABI_UPROBE = 6,
	40	};
	41
	42	enum lttng_kernel_abi_context_type {
	43	LTTNG_KERNEL_ABI_CONTEXT_PID = 0,
	44	LTTNG_KERNEL_ABI_CONTEXT_PERF_CPU_COUNTER = 1,
	45	LTTNG_KERNEL_ABI_CONTEXT_PROCNAME = 2,
	46	LTTNG_KERNEL_ABI_CONTEXT_PRIO = 3,
	47	LTTNG_KERNEL_ABI_CONTEXT_NICE = 4,
	48	LTTNG_KERNEL_ABI_CONTEXT_VPID = 5,
	49	LTTNG_KERNEL_ABI_CONTEXT_TID = 6,
	50	LTTNG_KERNEL_ABI_CONTEXT_VTID = 7,
	51	LTTNG_KERNEL_ABI_CONTEXT_PPID = 8,
	52	LTTNG_KERNEL_ABI_CONTEXT_VPPID = 9,
	53	LTTNG_KERNEL_ABI_CONTEXT_HOSTNAME = 10,
	54	LTTNG_KERNEL_ABI_CONTEXT_CPU_ID = 11,
	55	LTTNG_KERNEL_ABI_CONTEXT_INTERRUPTIBLE = 12,
	56	LTTNG_KERNEL_ABI_CONTEXT_PREEMPTIBLE = 13,
	57	LTTNG_KERNEL_ABI_CONTEXT_NEED_RESCHEDULE = 14,
	58	LTTNG_KERNEL_ABI_CONTEXT_MIGRATABLE = 15,
	59	LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_KERNEL = 16,
	60	LTTNG_KERNEL_ABI_CONTEXT_CALLSTACK_USER = 17,
	61	LTTNG_KERNEL_ABI_CONTEXT_CGROUP_NS = 18,
	62	LTTNG_KERNEL_ABI_CONTEXT_IPC_NS = 19,
	63	LTTNG_KERNEL_ABI_CONTEXT_MNT_NS = 20,
	64	LTTNG_KERNEL_ABI_CONTEXT_NET_NS = 21,
	65	LTTNG_KERNEL_ABI_CONTEXT_PID_NS = 22,
	66	LTTNG_KERNEL_ABI_CONTEXT_USER_NS = 23,
	67	LTTNG_KERNEL_ABI_CONTEXT_UTS_NS = 24,
	68	LTTNG_KERNEL_ABI_CONTEXT_UID = 25,
	69	LTTNG_KERNEL_ABI_CONTEXT_EUID = 26,
	70	LTTNG_KERNEL_ABI_CONTEXT_SUID = 27,
	71	LTTNG_KERNEL_ABI_CONTEXT_GID = 28,
	72	LTTNG_KERNEL_ABI_CONTEXT_EGID = 29,
	73	LTTNG_KERNEL_ABI_CONTEXT_SGID = 30,
	74	LTTNG_KERNEL_ABI_CONTEXT_VUID = 31,
	75	LTTNG_KERNEL_ABI_CONTEXT_VEUID = 32,
	76	LTTNG_KERNEL_ABI_CONTEXT_VSUID = 33,
	77	LTTNG_KERNEL_ABI_CONTEXT_VGID = 34,
	78	LTTNG_KERNEL_ABI_CONTEXT_VEGID = 35,
	79	LTTNG_KERNEL_ABI_CONTEXT_VSGID = 36,
	80	LTTNG_KERNEL_ABI_CONTEXT_TIME_NS = 37,
	81	};
	82
	83	/* Perf counter attributes */
	84	struct lttng_kernel_abi_perf_counter_ctx {
	85	uint32_t type;
	86	uint64_t config;
	87	char name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
	88	} LTTNG_PACKED;
	89
	90	/* Event/Channel context */
	91	#define LTTNG_KERNEL_ABI_CONTEXT_PADDING1 16
	92	#define LTTNG_KERNEL_ABI_CONTEXT_PADDING2 ((LTTNG_KERNEL_ABI_SYM_NAME_LEN + 32))
	93	struct lttng_kernel_abi_context {
	94	enum lttng_kernel_abi_context_type ctx;
	95	char padding[LTTNG_KERNEL_ABI_CONTEXT_PADDING1];
	96
	97	union {
	98	struct lttng_kernel_abi_perf_counter_ctx perf_counter;
	99	char padding[LTTNG_KERNEL_ABI_CONTEXT_PADDING2];
	100	} u;
	101	} LTTNG_PACKED;
	102
	103	struct lttng_kernel_abi_kretprobe {
	104	uint64_t addr;
	105
	106	uint64_t offset;
	107	char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
	108	} LTTNG_PACKED;
	109
	110	/*
	111	* Either addr is used, or symbol_name and offset.
	112	*/
	113	struct lttng_kernel_abi_kprobe {
	114	uint64_t addr;
	115
	116	uint64_t offset;
	117	char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
	118	} LTTNG_PACKED;
	119
	120	struct lttng_kernel_abi_uprobe {
	121	int fd;
	122	} LTTNG_PACKED;
	123
	124	struct lttng_kernel_abi_event_callsite_uprobe {
	125	uint64_t offset;
	126	} LTTNG_PACKED;
	127
	128	struct lttng_kernel_abi_event_callsite {
	129	union {
	130	struct lttng_kernel_abi_event_callsite_uprobe uprobe;
	131	} u;
	132	} LTTNG_PACKED;
	133
	134	enum lttng_kernel_abi_syscall_entryexit {
	135	LTTNG_KERNEL_ABI_SYSCALL_ENTRYEXIT = 0,
	136	LTTNG_KERNEL_ABI_SYSCALL_ENTRY = 1,
	137	LTTNG_KERNEL_ABI_SYSCALL_EXIT = 2,
	138	};
	139
	140	enum lttng_kernel_abi_syscall_abi {
	141	LTTNG_KERNEL_ABI_SYSCALL_ABI_ALL = 0,
	142	LTTNG_KERNEL_ABI_SYSCALL_ABI_NATIVE = 1,
	143	LTTNG_KERNEL_ABI_SYSCALL_ABI_COMPAT = 2,
	144	};
	145
	146	enum lttng_kernel_abi_syscall_match {
	147	LTTNG_KERNEL_ABI_SYSCALL_MATCH_NAME = 0,
	148	LTTNG_KERNEL_ABI_SYSCALL_MATCH_NR = 1,
	149	};
	150
	151	struct lttng_kernel_abi_syscall {
	152	uint8_t entryexit; /* enum lttng_kernel_abi_syscall_entryexit */
	153	uint8_t abi; /* enum lttng_kernel_abi_syscall_abi */
	154	uint8_t match; /* enum lttng_kernel_abi_syscall_match */
	155	uint8_t padding;
	156	uint32_t nr; /* For LTTNG_SYSCALL_MATCH_NR */
	157	} LTTNG_PACKED;
	158
	159	/* Function tracer */
	160	struct lttng_kernel_abi_function {
	161	char symbol_name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
	162	} LTTNG_PACKED;
	163
	164	#define LTTNG_KERNEL_ABI_EVENT_PADDING1 8
	165	#define LTTNG_KERNEL_ABI_EVENT_PADDING2 ((LTTNG_KERNEL_ABI_SYM_NAME_LEN + 32))
	166	struct lttng_kernel_abi_event {
	167	char name[LTTNG_KERNEL_ABI_SYM_NAME_LEN];
	168	enum lttng_kernel_abi_instrumentation instrumentation;
	169	uint64_t token;
	170	char padding[LTTNG_KERNEL_ABI_EVENT_PADDING1];
	171
	172	/* Per instrumentation type configuration */
	173	union {
	174	struct lttng_kernel_abi_kretprobe kretprobe;
	175	struct lttng_kernel_abi_kprobe kprobe;
	176	struct lttng_kernel_abi_function ftrace;
	177	struct lttng_kernel_abi_uprobe uprobe;
	178	struct lttng_kernel_abi_syscall syscall;
	179	char padding[LTTNG_KERNEL_ABI_EVENT_PADDING2];
	180	} u;
	181	} LTTNG_PACKED;
	182
	183	#define LTTNG_KERNEL_ABI_EVENT_NOTIFIER_PADDING 32
	184	struct lttng_kernel_abi_event_notifier {
	185	struct lttng_kernel_abi_event event;
	186	uint64_t error_counter_idx;
	187
	188	char padding[LTTNG_KERNEL_ABI_EVENT_NOTIFIER_PADDING];
	189	} LTTNG_PACKED;
	190
	191	#define LTTNG_KERNEL_ABI_COUNTER_DIMENSION_MAX 4
	192
	193	enum lttng_kernel_abi_counter_arithmetic {
	194	LTTNG_KERNEL_ABI_COUNTER_ARITHMETIC_MODULAR = 0,
	195	};
	196
	197	enum lttng_kernel_abi_counter_bitness {
	198	LTTNG_KERNEL_ABI_COUNTER_BITNESS_32 = 0,
	199	LTTNG_KERNEL_ABI_COUNTER_BITNESS_64 = 1,
	200	};
	201
	202	struct lttng_kernel_abi_counter_dimension {
	203	uint64_t size;
	204	uint64_t underflow_index;
	205	uint64_t overflow_index;
	206	uint8_t has_underflow;
	207	uint8_t has_overflow;
	208	} LTTNG_PACKED;
	209
	210	#define LTTNG_KERNEL_ABI_COUNTER_CONF_PADDING1 67
	211	struct lttng_kernel_abi_counter_conf {
	212	uint32_t arithmetic; /* enum lttng_kernel_abi_counter_arithmetic */
	213	uint32_t bitness; /* enum lttng_kernel_abi_counter_bitness */
	214	uint32_t number_dimensions;
	215	int64_t global_sum_step;
	216	struct lttng_kernel_abi_counter_dimension dimensions[LTTNG_KERNEL_ABI_COUNTER_DIMENSION_MAX];
	217	uint8_t coalesce_hits;
	218	char padding[LTTNG_KERNEL_ABI_COUNTER_CONF_PADDING1];
	219	} LTTNG_PACKED;
	220
	221	struct lttng_kernel_abi_counter_index {
	222	uint32_t number_dimensions;
	223	uint64_t dimension_indexes[LTTNG_KERNEL_ABI_COUNTER_DIMENSION_MAX];
	224	} LTTNG_PACKED;
	225
	226	struct lttng_kernel_abi_counter_value {
	227	int64_t value;
	228	uint8_t underflow;
	229	uint8_t overflow;
	230	} LTTNG_PACKED;
	231
	232	#define LTTNG_KERNEL_ABI_COUNTER_READ_PADDING 32
	233	struct lttng_kernel_abi_counter_read {
	234	struct lttng_kernel_abi_counter_index index;
	235	int32_t cpu; /* -1 for global counter, >= 0 for specific cpu. */
	236	struct lttng_kernel_abi_counter_value value; /* output */
	237	char padding[LTTNG_KERNEL_ABI_COUNTER_READ_PADDING];
	238	} LTTNG_PACKED;
	239
	240	#define LTTNG_KERNEL_ABI_COUNTER_AGGREGATE_PADDING 32
	241	struct lttng_kernel_abi_counter_aggregate {
	242	struct lttng_kernel_abi_counter_index index;
	243	struct lttng_kernel_abi_counter_value value; /* output */
	244	char padding[LTTNG_KERNEL_ABI_COUNTER_AGGREGATE_PADDING];
	245	} LTTNG_PACKED;
	246
	247	#define LTTNG_KERNEL_ABI_COUNTER_CLEAR_PADDING 32
	248	struct lttng_kernel_abi_counter_clear {
	249	struct lttng_kernel_abi_counter_index index;
	250	char padding[LTTNG_KERNEL_ABI_COUNTER_CLEAR_PADDING];
	251	} LTTNG_PACKED;
	252
	253	#define LTTNG_KERNEL_ABI_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
	254	struct lttng_kernel_abi_event_notifier_notification {
	255	uint64_t token;
	256	uint16_t capture_buf_size;
	257	char padding[LTTNG_KERNEL_ABI_EVENT_NOTIFIER_NOTIFICATION_PADDING];
	258	} LTTNG_PACKED;
	259
	260	#define LTTNG_KERNEL_ABI_CAPTURE_BYTECODE_MAX_LEN 65536
	261	struct lttng_kernel_abi_capture_bytecode {
	262	uint32_t len;
	263	uint32_t reloc_offset;
	264	uint64_t seqnum;
	265	char data[0];
	266	} LTTNG_PACKED;
	267
	268	struct lttng_kernel_abi_tracer_version {
	269	uint32_t major;
	270	uint32_t minor;
	271	uint32_t patchlevel;
	272	} LTTNG_PACKED;
	273
	274	struct lttng_kernel_abi_tracer_abi_version {
	275	uint32_t major;
	276	uint32_t minor;
	277	} LTTNG_PACKED;
	278
	279	struct lttng_kernel_abi_syscall_mask {
	280	uint32_t len; /* in bits */
	281	char mask[LTTNG_FLEXIBLE_ARRAY_MEMBER_LENGTH];
	282	} LTTNG_PACKED;
	283
	284	/*
	285	* kernel channel
	286	*/
	287	#define LTTNG_KERNEL_ABI_CHANNEL_PADDING1 ((LTTNG_SYMBOL_NAME_LEN + 32))
	288	struct lttng_kernel_abi_channel {
	289	uint64_t subbuf_size; /* bytes */
	290	uint64_t num_subbuf; /* power of 2 */
	291	unsigned int switch_timer_interval; /* usec */
	292	unsigned int read_timer_interval; /* usec */
	293	enum lttng_event_output output; /* splice, mmap */
	294
	295	int overwrite; /* 1: overwrite, 0: discard */
	296	char padding[LTTNG_KERNEL_ABI_CHANNEL_PADDING1];
	297	} LTTNG_PACKED;
	298
	299	#define KERNEL_FILTER_BYTECODE_MAX_LEN 65536
	300	struct lttng_kernel_abi_filter_bytecode {
	301	uint32_t len;
	302	uint32_t reloc_offset;
	303	uint64_t seqnum;
	304	char data[0];
	305	} LTTNG_PACKED;
	306
	307	/*
	308	* kernel session name
	309	*/
	310	struct lttng_kernel_abi_session_name {
	311	char name[LTTNG_KERNEL_ABI_SESSION_NAME_LEN];
	312	} LTTNG_PACKED;
	313
	314	/*
	315	* kernel session creation datetime
	316	*/
	317	struct lttng_kernel_abi_session_creation_time {
	318	char iso8601[LTTNG_KERNEL_ABI_SESSION_CREATION_TIME_ISO8601_LEN];
	319	} LTTNG_PACKED;
	320
	321	enum lttng_kernel_abi_tracker_type {
	322	LTTNG_KERNEL_ABI_TRACKER_UNKNOWN = -1,
	323
	324	LTTNG_KERNEL_ABI_TRACKER_PID = 0,
	325	LTTNG_KERNEL_ABI_TRACKER_VPID = 1,
	326	LTTNG_KERNEL_ABI_TRACKER_UID = 2,
	327	LTTNG_KERNEL_ABI_TRACKER_VUID = 3,
	328	LTTNG_KERNEL_ABI_TRACKER_GID = 4,
	329	LTTNG_KERNEL_ABI_TRACKER_VGID = 5,
	330	};
	331
	332	struct lttng_kernel_abi_tracker_args {
	333	enum lttng_kernel_abi_tracker_type type;
	334	int32_t id;
	335	};
	336
	337	#endif /* _LTTNG_KERNEL_H */