[lttng-ust.git] / include / lttng / ust-abi.h

/*
 * SPDX-License-Identifier: MIT
 *
 * Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * LTTng-UST ABI header
 */

#ifndef _LTTNG_UST_ABI_H
#define _LTTNG_UST_ABI_H

#include <stdint.h>
#include <lttng/ust-compiler.h>

#ifndef LTTNG_PACKED
#error "LTTNG_PACKED should be defined"
#endif

#ifndef __ust_stringify
#define __ust_stringify1(x)	#x
#define __ust_stringify(x)	__ust_stringify1(x)
#endif /* __ust_stringify */

#define LTTNG_UST_SYM_NAME_LEN			256
#define LTTNG_UST_ABI_PROCNAME_LEN		16

/* UST comm magic number, used to validate protocol and endianness. */
#define LTTNG_UST_COMM_MAGIC			0xC57C57C5

/* Version for ABI between liblttng-ust, sessiond, consumerd */
#define LTTNG_UST_ABI_MAJOR_VERSION			9
#define LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE	8
#define LTTNG_UST_ABI_MINOR_VERSION		0

enum lttng_ust_instrumentation {
	LTTNG_UST_TRACEPOINT		= 0,
	LTTNG_UST_PROBE			= 1,
	LTTNG_UST_FUNCTION		= 2,
};

enum lttng_ust_loglevel_type {
	LTTNG_UST_LOGLEVEL_ALL		= 0,
	LTTNG_UST_LOGLEVEL_RANGE	= 1,
	LTTNG_UST_LOGLEVEL_SINGLE	= 2,
};

enum lttng_ust_output {
	LTTNG_UST_MMAP		= 0,
};

enum lttng_ust_chan_type {
	LTTNG_UST_CHAN_PER_CPU = 0,
	LTTNG_UST_CHAN_METADATA = 1,
};

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

#define LTTNG_UST_CHANNEL_PADDING	(LTTNG_UST_SYM_NAME_LEN + 32)
/*
 * Given that the consumerd is limited to 64k file descriptors, we
 * cannot expect much more than 1MB channel structure size. This size is
 * depends on the number of streams within a channel, which depends on
 * the number of possible CPUs on the system.
 */
#define LTTNG_UST_CHANNEL_DATA_MAX_LEN	1048576U
struct lttng_ust_channel {
	uint64_t len;
	enum lttng_ust_chan_type type;
	char padding[LTTNG_UST_CHANNEL_PADDING];
	char data[];	/* variable sized data */
} LTTNG_PACKED;

#define LTTNG_UST_STREAM_PADDING1	(LTTNG_UST_SYM_NAME_LEN + 32)
struct lttng_ust_stream {
	uint64_t len;		/* shm len */
	uint32_t stream_nr;	/* stream number */
	char padding[LTTNG_UST_STREAM_PADDING1];
	/*
	 * shm_fd and wakeup_fd are send over unix socket as file
	 * descriptors after this structure.
	 */
} LTTNG_PACKED;

#define LTTNG_UST_COUNTER_DIMENSION_MAX 4

enum lttng_ust_counter_arithmetic {
	LTTNG_UST_COUNTER_ARITHMETIC_MODULAR = 0,
	LTTNG_UST_COUNTER_ARITHMETIC_SATURATION = 1,
};

enum lttng_ust_counter_bitness {
	LTTNG_UST_COUNTER_BITNESS_32 = 0,
	LTTNG_UST_COUNTER_BITNESS_64 = 1,
};

struct lttng_ust_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_UST_COUNTER_CONF_PADDING1 67
struct lttng_ust_counter_conf {
	uint32_t arithmetic;	/* enum lttng_ust_counter_arithmetic */
	uint32_t bitness;	/* enum lttng_ust_counter_bitness */
	uint32_t number_dimensions;
	int64_t global_sum_step;
	struct lttng_ust_counter_dimension dimensions[LTTNG_UST_COUNTER_DIMENSION_MAX];
	uint8_t coalesce_hits;
	char padding[LTTNG_UST_COUNTER_CONF_PADDING1];
} LTTNG_PACKED;

struct lttng_ust_counter_value {
	uint32_t number_dimensions;
	uint64_t dimension_indexes[LTTNG_UST_COUNTER_DIMENSION_MAX];
	int64_t value;
} LTTNG_PACKED;

#define LTTNG_UST_EVENT_PADDING1	8
#define LTTNG_UST_EVENT_PADDING2	(LTTNG_UST_SYM_NAME_LEN + 32)
struct lttng_ust_event {
	enum lttng_ust_instrumentation instrumentation;
	char name[LTTNG_UST_SYM_NAME_LEN];	/* event name */

	enum lttng_ust_loglevel_type loglevel_type;
	int loglevel;	/* value, -1: all */
	uint64_t token;				/* User-provided token */
	char padding[LTTNG_UST_EVENT_PADDING1];

	/* Per instrumentation type configuration */
	union {
		char padding[LTTNG_UST_EVENT_PADDING2];
	} u;
} LTTNG_PACKED;

#define LTTNG_UST_EVENT_NOTIFIER_PADDING	32
struct lttng_ust_event_notifier {
	struct lttng_ust_event event;
	uint64_t error_counter_index;
	char padding[LTTNG_UST_EVENT_NOTIFIER_PADDING];
} LTTNG_PACKED;

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

#define LTTNG_UST_COUNTER_PADDING1	(LTTNG_UST_SYM_NAME_LEN + 32)
#define LTTNG_UST_COUNTER_DATA_MAX_LEN	4096U
struct lttng_ust_counter {
	uint64_t len;
	char padding[LTTNG_UST_COUNTER_PADDING1];
	char data[];	/* variable sized data */
} LTTNG_PACKED;

#define LTTNG_UST_COUNTER_GLOBAL_PADDING1	(LTTNG_UST_SYM_NAME_LEN + 32)
struct lttng_ust_counter_global {
	uint64_t len;		/* shm len */
	char padding[LTTNG_UST_COUNTER_GLOBAL_PADDING1];
} LTTNG_PACKED;

#define LTTNG_UST_COUNTER_CPU_PADDING1	(LTTNG_UST_SYM_NAME_LEN + 32)
struct lttng_ust_counter_cpu {
	uint64_t len;		/* shm len */
	uint32_t cpu_nr;
	char padding[LTTNG_UST_COUNTER_CPU_PADDING1];
} LTTNG_PACKED;

enum lttng_ust_field_type {
	LTTNG_UST_FIELD_OTHER			= 0,
	LTTNG_UST_FIELD_INTEGER			= 1,
	LTTNG_UST_FIELD_ENUM			= 2,
	LTTNG_UST_FIELD_FLOAT			= 3,
	LTTNG_UST_FIELD_STRING			= 4,
};

#define LTTNG_UST_FIELD_ITER_PADDING	(LTTNG_UST_SYM_NAME_LEN + 28)
struct lttng_ust_field_iter {
	char event_name[LTTNG_UST_SYM_NAME_LEN];
	char field_name[LTTNG_UST_SYM_NAME_LEN];
	enum lttng_ust_field_type type;
	int loglevel;				/* event loglevel */
	int nowrite;
	char padding[LTTNG_UST_FIELD_ITER_PADDING];
} LTTNG_PACKED;

enum lttng_ust_context_type {
	LTTNG_UST_CONTEXT_VTID			= 0,
	LTTNG_UST_CONTEXT_VPID			= 1,
	LTTNG_UST_CONTEXT_PTHREAD_ID		= 2,
	LTTNG_UST_CONTEXT_PROCNAME		= 3,
	LTTNG_UST_CONTEXT_IP			= 4,
	LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER	= 5,
	LTTNG_UST_CONTEXT_CPU_ID		= 6,
	LTTNG_UST_CONTEXT_APP_CONTEXT		= 7,
	LTTNG_UST_CONTEXT_CGROUP_NS		= 8,
	LTTNG_UST_CONTEXT_IPC_NS		= 9,
	LTTNG_UST_CONTEXT_MNT_NS		= 10,
	LTTNG_UST_CONTEXT_NET_NS		= 11,
	LTTNG_UST_CONTEXT_PID_NS		= 12,
	LTTNG_UST_CONTEXT_USER_NS		= 13,
	LTTNG_UST_CONTEXT_UTS_NS		= 14,
	LTTNG_UST_CONTEXT_VUID			= 15,
	LTTNG_UST_CONTEXT_VEUID			= 16,
	LTTNG_UST_CONTEXT_VSUID			= 17,
	LTTNG_UST_CONTEXT_VGID			= 18,
	LTTNG_UST_CONTEXT_VEGID			= 19,
	LTTNG_UST_CONTEXT_VSGID			= 20,
	LTTNG_UST_CONTEXT_TIME_NS		= 21,
};

struct lttng_ust_perf_counter_ctx {
	uint32_t type;
	uint64_t config;
	char name[LTTNG_UST_SYM_NAME_LEN];
} LTTNG_PACKED;

#define LTTNG_UST_CONTEXT_PADDING1	16
#define LTTNG_UST_CONTEXT_PADDING2	(LTTNG_UST_SYM_NAME_LEN + 32)
struct lttng_ust_context {
	enum lttng_ust_context_type ctx;
	char padding[LTTNG_UST_CONTEXT_PADDING1];

	union {
		struct lttng_ust_perf_counter_ctx perf_counter;
		struct {
			/* Includes trailing '\0'. */
			uint32_t provider_name_len;
			uint32_t ctx_name_len;
		} app_ctx;
		char padding[LTTNG_UST_CONTEXT_PADDING2];
	} u;
} LTTNG_PACKED;

/*
 * Tracer channel attributes.
 */
#define LTTNG_UST_CHANNEL_ATTR_PADDING	(LTTNG_UST_SYM_NAME_LEN + 32)
struct lttng_ust_channel_attr {
	uint64_t subbuf_size;			/* bytes */
	uint64_t num_subbuf;			/* power of 2 */
	int overwrite;				/* 1: overwrite, 0: discard */
	unsigned int switch_timer_interval;	/* usec */
	unsigned int read_timer_interval;	/* usec */
	enum lttng_ust_output output;		/* splice, mmap */
	union {
		struct {
			int64_t blocking_timeout;	/* Blocking timeout (usec) */
		} s;
		char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
	} u;
} LTTNG_PACKED;

#define LTTNG_UST_TRACEPOINT_ITER_PADDING	16
struct lttng_ust_tracepoint_iter {
	char name[LTTNG_UST_SYM_NAME_LEN];	/* provider:name */
	int loglevel;
	char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
} LTTNG_PACKED;

enum lttng_ust_object_type {
	LTTNG_UST_OBJECT_TYPE_UNKNOWN = -1,
	LTTNG_UST_OBJECT_TYPE_CHANNEL = 0,
	LTTNG_UST_OBJECT_TYPE_STREAM = 1,
	LTTNG_UST_OBJECT_TYPE_EVENT = 2,
	LTTNG_UST_OBJECT_TYPE_CONTEXT = 3,
	LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP = 4,
	LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER = 5,
	LTTNG_UST_OBJECT_TYPE_COUNTER = 6,
	LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL = 7,
	LTTNG_UST_OBJECT_TYPE_COUNTER_CPU = 8,
};

#define LTTNG_UST_OBJECT_DATA_PADDING1	32
#define LTTNG_UST_OBJECT_DATA_PADDING2	(LTTNG_UST_SYM_NAME_LEN + 32)

struct lttng_ust_object_data {
	enum lttng_ust_object_type type;
	int handle;
	uint64_t size;
	char padding1[LTTNG_UST_OBJECT_DATA_PADDING1];
	union {
		struct {
			void *data;
			enum lttng_ust_chan_type type;
			int wakeup_fd;
		} channel;
		struct {
			int shm_fd;
			int wakeup_fd;
			uint32_t stream_nr;
		} stream;
		struct {
			void *data;
		} counter;
		struct {
			int shm_fd;
		} counter_global;
		struct {
			int shm_fd;
			uint32_t cpu_nr;
		} counter_cpu;
		char padding2[LTTNG_UST_OBJECT_DATA_PADDING2];
	} u;
} LTTNG_PACKED;

enum lttng_ust_calibrate_type {
	LTTNG_UST_CALIBRATE_TRACEPOINT,
};

#define LTTNG_UST_CALIBRATE_PADDING1	16
#define LTTNG_UST_CALIBRATE_PADDING2	(LTTNG_UST_SYM_NAME_LEN + 32)
struct lttng_ust_calibrate {
	enum lttng_ust_calibrate_type type;	/* type (input) */
	char padding[LTTNG_UST_CALIBRATE_PADDING1];

	union {
		char padding[LTTNG_UST_CALIBRATE_PADDING2];
	} u;
} LTTNG_PACKED;

#define FILTER_BYTECODE_MAX_LEN		65536
#define LTTNG_UST_FILTER_PADDING	32
struct lttng_ust_filter_bytecode {
	uint32_t len;
	uint32_t reloc_offset;
	uint64_t seqnum;
	char padding[LTTNG_UST_FILTER_PADDING];
	char data[0];
} LTTNG_PACKED;

#define CAPTURE_BYTECODE_MAX_LEN	65536
#define LTTNG_UST_CAPTURE_PADDING	32
struct lttng_ust_capture_bytecode {
	uint32_t len;
	uint32_t reloc_offset;
	uint64_t seqnum;
	char padding[LTTNG_UST_CAPTURE_PADDING];
	char data[0];
} LTTNG_PACKED;

#define LTTNG_UST_EXCLUSION_PADDING	32
struct lttng_ust_event_exclusion {
	uint32_t count;
	char padding[LTTNG_UST_EXCLUSION_PADDING];
	char names[LTTNG_UST_SYM_NAME_LEN][0];
} LTTNG_PACKED;

#define _UST_CMD(minor)				(minor)
#define _UST_CMDR(minor, type)			(minor)
#define _UST_CMDW(minor, type)			(minor)

/* Handled by object descriptor */
#define LTTNG_UST_RELEASE			_UST_CMD(0x1)

/* Handled by object cmd */

/* LTTng-UST commands */
#define LTTNG_UST_SESSION			_UST_CMD(0x40)
#define LTTNG_UST_TRACER_VERSION		\
	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
#define LTTNG_UST_TRACEPOINT_LIST		_UST_CMD(0x42)
#define LTTNG_UST_WAIT_QUIESCENT		_UST_CMD(0x43)
#define LTTNG_UST_REGISTER_DONE			_UST_CMD(0x44)
#define LTTNG_UST_TRACEPOINT_FIELD_LIST		_UST_CMD(0x45)
#define LTTNG_UST_EVENT_NOTIFIER_GROUP_CREATE	_UST_CMD(0x46)

/* Session commands */
#define LTTNG_UST_CHANNEL			\
	_UST_CMDW(0x51, struct lttng_ust_channel)
#define LTTNG_UST_SESSION_START			_UST_CMD(0x52)
#define LTTNG_UST_SESSION_STOP			_UST_CMD(0x53)
#define LTTNG_UST_SESSION_STATEDUMP		_UST_CMD(0x54)

/* Channel commands */
#define LTTNG_UST_STREAM			_UST_CMD(0x60)
#define LTTNG_UST_EVENT			\
	_UST_CMDW(0x61, struct lttng_ust_event)

/* Event and channel commands */
#define LTTNG_UST_CONTEXT			\
	_UST_CMDW(0x70, struct lttng_ust_context)
#define LTTNG_UST_FLUSH_BUFFER			\
	_UST_CMD(0x71)

/* Event, event notifier, channel and session commands */
#define LTTNG_UST_ENABLE			_UST_CMD(0x80)
#define LTTNG_UST_DISABLE			_UST_CMD(0x81)

/* Tracepoint list commands */
#define LTTNG_UST_TRACEPOINT_LIST_GET		_UST_CMD(0x90)
#define LTTNG_UST_TRACEPOINT_FIELD_LIST_GET	_UST_CMD(0x91)

/* Event and event notifier commands */
#define LTTNG_UST_FILTER			_UST_CMD(0xA0)
#define LTTNG_UST_EXCLUSION			_UST_CMD(0xA1)

/* Event notifier group commands */
#define LTTNG_UST_EVENT_NOTIFIER_CREATE		\
	_UST_CMDW(0xB0, struct lttng_ust_event_notifier)

/* Event notifier commands */
#define LTTNG_UST_CAPTURE			_UST_CMD(0xB6)

/* Session and event notifier group commands */
#define LTTNG_UST_COUNTER			\
	_UST_CMDW(0xC0, struct lttng_ust_counter)

/* Counter commands */
#define LTTNG_UST_COUNTER_GLOBAL		\
	_UST_CMDW(0xD0, struct lttng_ust_counter_global)
#define LTTNG_UST_COUNTER_CPU			\
	_UST_CMDW(0xD1, struct lttng_ust_counter_cpu)

#define LTTNG_UST_ROOT_HANDLE	0

struct lttng_ust_obj;

union ust_args {
	struct {
		void *chan_data;
		int wakeup_fd;
	} channel;
	struct {
		int shm_fd;
		int wakeup_fd;
	} stream;
	struct {
		struct lttng_ust_field_iter entry;
	} field_list;
	struct {
		char *ctxname;
	} app_context;
	struct {
		int event_notifier_notif_fd;
	} event_notifier_handle;
	struct {
		void *counter_data;
	} counter;
	struct {
		int shm_fd;
	} counter_shm;
};

struct lttng_ust_objd_ops {
	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
		union ust_args *args, void *owner);
	int (*release)(int objd);
};

/* Create root handle. Always ID 0. */
int lttng_abi_create_root_handle(void);

const struct lttng_ust_objd_ops *objd_ops(int id);
int lttng_ust_objd_unref(int id, int is_owner);

void lttng_ust_abi_exit(void);
void lttng_ust_events_exit(void);
void lttng_ust_objd_table_owner_cleanup(void *owner);

#endif /* _LTTNG_UST_ABI_H */
Commit	Line	Data
	1	/*
	2	* SPDX-License-Identifier: MIT
	3	*
	4	* Copyright (C) 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	5	*
	6	* LTTng-UST ABI header
	7	*/
	8
	9	#ifndef _LTTNG_UST_ABI_H
	10	#define _LTTNG_UST_ABI_H
	11
	12	#include <stdint.h>
	13	#include <lttng/ust-compiler.h>
	14
	15	#ifndef LTTNG_PACKED
	16	#error "LTTNG_PACKED should be defined"
	17	#endif
	18
	19	#ifndef __ust_stringify
	20	#define __ust_stringify1(x) #x
	21	#define __ust_stringify(x) __ust_stringify1(x)
	22	#endif /* __ust_stringify */
	23
	24	#define LTTNG_UST_SYM_NAME_LEN 256
	25	#define LTTNG_UST_ABI_PROCNAME_LEN 16
	26
	27	/* UST comm magic number, used to validate protocol and endianness. */
	28	#define LTTNG_UST_COMM_MAGIC 0xC57C57C5
	29
	30	/* Version for ABI between liblttng-ust, sessiond, consumerd */
	31	#define LTTNG_UST_ABI_MAJOR_VERSION 9
	32	#define LTTNG_UST_ABI_MAJOR_VERSION_OLDEST_COMPATIBLE 8
	33	#define LTTNG_UST_ABI_MINOR_VERSION 0
	34
	35	enum lttng_ust_instrumentation {
	36	LTTNG_UST_TRACEPOINT = 0,
	37	LTTNG_UST_PROBE = 1,
	38	LTTNG_UST_FUNCTION = 2,
	39	};
	40
	41	enum lttng_ust_loglevel_type {
	42	LTTNG_UST_LOGLEVEL_ALL = 0,
	43	LTTNG_UST_LOGLEVEL_RANGE = 1,
	44	LTTNG_UST_LOGLEVEL_SINGLE = 2,
	45	};
	46
	47	enum lttng_ust_output {
	48	LTTNG_UST_MMAP = 0,
	49	};
	50
	51	enum lttng_ust_chan_type {
	52	LTTNG_UST_CHAN_PER_CPU = 0,
	53	LTTNG_UST_CHAN_METADATA = 1,
	54	};
	55
	56	struct lttng_ust_tracer_version {
	57	uint32_t major;
	58	uint32_t minor;
	59	uint32_t patchlevel;
	60	} LTTNG_PACKED;
	61
	62	#define LTTNG_UST_CHANNEL_PADDING (LTTNG_UST_SYM_NAME_LEN + 32)
	63	/*
	64	* Given that the consumerd is limited to 64k file descriptors, we
	65	* cannot expect much more than 1MB channel structure size. This size is
	66	* depends on the number of streams within a channel, which depends on
	67	* the number of possible CPUs on the system.
	68	*/
	69	#define LTTNG_UST_CHANNEL_DATA_MAX_LEN 1048576U
	70	struct lttng_ust_channel {
	71	uint64_t len;
	72	enum lttng_ust_chan_type type;
	73	char padding[LTTNG_UST_CHANNEL_PADDING];
	74	char data[]; /* variable sized data */
	75	} LTTNG_PACKED;
	76
	77	#define LTTNG_UST_STREAM_PADDING1 (LTTNG_UST_SYM_NAME_LEN + 32)
	78	struct lttng_ust_stream {
	79	uint64_t len; /* shm len */
	80	uint32_t stream_nr; /* stream number */
	81	char padding[LTTNG_UST_STREAM_PADDING1];
	82	/*
	83	* shm_fd and wakeup_fd are send over unix socket as file
	84	* descriptors after this structure.
	85	*/
	86	} LTTNG_PACKED;
	87
	88	#define LTTNG_UST_COUNTER_DIMENSION_MAX 4
	89
	90	enum lttng_ust_counter_arithmetic {
	91	LTTNG_UST_COUNTER_ARITHMETIC_MODULAR = 0,
	92	LTTNG_UST_COUNTER_ARITHMETIC_SATURATION = 1,
	93	};
	94
	95	enum lttng_ust_counter_bitness {
	96	LTTNG_UST_COUNTER_BITNESS_32 = 0,
	97	LTTNG_UST_COUNTER_BITNESS_64 = 1,
	98	};
	99
	100	struct lttng_ust_counter_dimension {
	101	uint64_t size;
	102	uint64_t underflow_index;
	103	uint64_t overflow_index;
	104	uint8_t has_underflow;
	105	uint8_t has_overflow;
	106	} LTTNG_PACKED;
	107
	108	#define LTTNG_UST_COUNTER_CONF_PADDING1 67
	109	struct lttng_ust_counter_conf {
	110	uint32_t arithmetic; /* enum lttng_ust_counter_arithmetic */
	111	uint32_t bitness; /* enum lttng_ust_counter_bitness */
	112	uint32_t number_dimensions;
	113	int64_t global_sum_step;
	114	struct lttng_ust_counter_dimension dimensions[LTTNG_UST_COUNTER_DIMENSION_MAX];
	115	uint8_t coalesce_hits;
	116	char padding[LTTNG_UST_COUNTER_CONF_PADDING1];
	117	} LTTNG_PACKED;
	118
	119	struct lttng_ust_counter_value {
	120	uint32_t number_dimensions;
	121	uint64_t dimension_indexes[LTTNG_UST_COUNTER_DIMENSION_MAX];
	122	int64_t value;
	123	} LTTNG_PACKED;
	124
	125	#define LTTNG_UST_EVENT_PADDING1 8
	126	#define LTTNG_UST_EVENT_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	127	struct lttng_ust_event {
	128	enum lttng_ust_instrumentation instrumentation;
	129	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	130
	131	enum lttng_ust_loglevel_type loglevel_type;
	132	int loglevel; /* value, -1: all */
	133	uint64_t token; /* User-provided token */
	134	char padding[LTTNG_UST_EVENT_PADDING1];
	135
	136	/* Per instrumentation type configuration */
	137	union {
	138	char padding[LTTNG_UST_EVENT_PADDING2];
	139	} u;
	140	} LTTNG_PACKED;
	141
	142	#define LTTNG_UST_EVENT_NOTIFIER_PADDING 32
	143	struct lttng_ust_event_notifier {
	144	struct lttng_ust_event event;
	145	uint64_t error_counter_index;
	146	char padding[LTTNG_UST_EVENT_NOTIFIER_PADDING];
	147	} LTTNG_PACKED;
	148
	149	#define LTTNG_EVENT_NOTIFIER_NOTIFICATION_PADDING 32
	150	struct lttng_ust_event_notifier_notification {
	151	uint64_t token;
	152	uint16_t capture_buf_size;
	153	char padding[LTTNG_EVENT_NOTIFIER_NOTIFICATION_PADDING];
	154	} LTTNG_PACKED;
	155
	156	#define LTTNG_UST_COUNTER_PADDING1 (LTTNG_UST_SYM_NAME_LEN + 32)
	157	#define LTTNG_UST_COUNTER_DATA_MAX_LEN 4096U
	158	struct lttng_ust_counter {
	159	uint64_t len;
	160	char padding[LTTNG_UST_COUNTER_PADDING1];
	161	char data[]; /* variable sized data */
	162	} LTTNG_PACKED;
	163
	164	#define LTTNG_UST_COUNTER_GLOBAL_PADDING1 (LTTNG_UST_SYM_NAME_LEN + 32)
	165	struct lttng_ust_counter_global {
	166	uint64_t len; /* shm len */
	167	char padding[LTTNG_UST_COUNTER_GLOBAL_PADDING1];
	168	} LTTNG_PACKED;
	169
	170	#define LTTNG_UST_COUNTER_CPU_PADDING1 (LTTNG_UST_SYM_NAME_LEN + 32)
	171	struct lttng_ust_counter_cpu {
	172	uint64_t len; /* shm len */
	173	uint32_t cpu_nr;
	174	char padding[LTTNG_UST_COUNTER_CPU_PADDING1];
	175	} LTTNG_PACKED;
	176
	177	enum lttng_ust_field_type {
	178	LTTNG_UST_FIELD_OTHER = 0,
	179	LTTNG_UST_FIELD_INTEGER = 1,
	180	LTTNG_UST_FIELD_ENUM = 2,
	181	LTTNG_UST_FIELD_FLOAT = 3,
	182	LTTNG_UST_FIELD_STRING = 4,
	183	};
	184
	185	#define LTTNG_UST_FIELD_ITER_PADDING (LTTNG_UST_SYM_NAME_LEN + 28)
	186	struct lttng_ust_field_iter {
	187	char event_name[LTTNG_UST_SYM_NAME_LEN];
	188	char field_name[LTTNG_UST_SYM_NAME_LEN];
	189	enum lttng_ust_field_type type;
	190	int loglevel; /* event loglevel */
	191	int nowrite;
	192	char padding[LTTNG_UST_FIELD_ITER_PADDING];
	193	} LTTNG_PACKED;
	194
	195	enum lttng_ust_context_type {
	196	LTTNG_UST_CONTEXT_VTID = 0,
	197	LTTNG_UST_CONTEXT_VPID = 1,
	198	LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
	199	LTTNG_UST_CONTEXT_PROCNAME = 3,
	200	LTTNG_UST_CONTEXT_IP = 4,
	201	LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER = 5,
	202	LTTNG_UST_CONTEXT_CPU_ID = 6,
	203	LTTNG_UST_CONTEXT_APP_CONTEXT = 7,
	204	LTTNG_UST_CONTEXT_CGROUP_NS = 8,
	205	LTTNG_UST_CONTEXT_IPC_NS = 9,
	206	LTTNG_UST_CONTEXT_MNT_NS = 10,
	207	LTTNG_UST_CONTEXT_NET_NS = 11,
	208	LTTNG_UST_CONTEXT_PID_NS = 12,
	209	LTTNG_UST_CONTEXT_USER_NS = 13,
	210	LTTNG_UST_CONTEXT_UTS_NS = 14,
	211	LTTNG_UST_CONTEXT_VUID = 15,
	212	LTTNG_UST_CONTEXT_VEUID = 16,
	213	LTTNG_UST_CONTEXT_VSUID = 17,
	214	LTTNG_UST_CONTEXT_VGID = 18,
	215	LTTNG_UST_CONTEXT_VEGID = 19,
	216	LTTNG_UST_CONTEXT_VSGID = 20,
	217	LTTNG_UST_CONTEXT_TIME_NS = 21,
	218	};
	219
	220	struct lttng_ust_perf_counter_ctx {
	221	uint32_t type;
	222	uint64_t config;
	223	char name[LTTNG_UST_SYM_NAME_LEN];
	224	} LTTNG_PACKED;
	225
	226	#define LTTNG_UST_CONTEXT_PADDING1 16
	227	#define LTTNG_UST_CONTEXT_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	228	struct lttng_ust_context {
	229	enum lttng_ust_context_type ctx;
	230	char padding[LTTNG_UST_CONTEXT_PADDING1];
	231
	232	union {
	233	struct lttng_ust_perf_counter_ctx perf_counter;
	234	struct {
	235	/* Includes trailing '\0'. */
	236	uint32_t provider_name_len;
	237	uint32_t ctx_name_len;
	238	} app_ctx;
	239	char padding[LTTNG_UST_CONTEXT_PADDING2];
	240	} u;
	241	} LTTNG_PACKED;
	242
	243	/*
	244	* Tracer channel attributes.
	245	*/
	246	#define LTTNG_UST_CHANNEL_ATTR_PADDING (LTTNG_UST_SYM_NAME_LEN + 32)
	247	struct lttng_ust_channel_attr {
	248	uint64_t subbuf_size; /* bytes */
	249	uint64_t num_subbuf; /* power of 2 */
	250	int overwrite; /* 1: overwrite, 0: discard */
	251	unsigned int switch_timer_interval; /* usec */
	252	unsigned int read_timer_interval; /* usec */
	253	enum lttng_ust_output output; /* splice, mmap */
	254	union {
	255	struct {
	256	int64_t blocking_timeout; /* Blocking timeout (usec) */
	257	} s;
	258	char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
	259	} u;
	260	} LTTNG_PACKED;
	261
	262	#define LTTNG_UST_TRACEPOINT_ITER_PADDING 16
	263	struct lttng_ust_tracepoint_iter {
	264	char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */
	265	int loglevel;
	266	char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
	267	} LTTNG_PACKED;
	268
	269	enum lttng_ust_object_type {
	270	LTTNG_UST_OBJECT_TYPE_UNKNOWN = -1,
	271	LTTNG_UST_OBJECT_TYPE_CHANNEL = 0,
	272	LTTNG_UST_OBJECT_TYPE_STREAM = 1,
	273	LTTNG_UST_OBJECT_TYPE_EVENT = 2,
	274	LTTNG_UST_OBJECT_TYPE_CONTEXT = 3,
	275	LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER_GROUP = 4,
	276	LTTNG_UST_OBJECT_TYPE_EVENT_NOTIFIER = 5,
	277	LTTNG_UST_OBJECT_TYPE_COUNTER = 6,
	278	LTTNG_UST_OBJECT_TYPE_COUNTER_GLOBAL = 7,
	279	LTTNG_UST_OBJECT_TYPE_COUNTER_CPU = 8,
	280	};
	281
	282	#define LTTNG_UST_OBJECT_DATA_PADDING1 32
	283	#define LTTNG_UST_OBJECT_DATA_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	284
	285	struct lttng_ust_object_data {
	286	enum lttng_ust_object_type type;
	287	int handle;
	288	uint64_t size;
	289	char padding1[LTTNG_UST_OBJECT_DATA_PADDING1];
	290	union {
	291	struct {
	292	void *data;
	293	enum lttng_ust_chan_type type;
	294	int wakeup_fd;
	295	} channel;
	296	struct {
	297	int shm_fd;
	298	int wakeup_fd;
	299	uint32_t stream_nr;
	300	} stream;
	301	struct {
	302	void *data;
	303	} counter;
	304	struct {
	305	int shm_fd;
	306	} counter_global;
	307	struct {
	308	int shm_fd;
	309	uint32_t cpu_nr;
	310	} counter_cpu;
	311	char padding2[LTTNG_UST_OBJECT_DATA_PADDING2];
	312	} u;
	313	} LTTNG_PACKED;
	314
	315	enum lttng_ust_calibrate_type {
	316	LTTNG_UST_CALIBRATE_TRACEPOINT,
	317	};
	318
	319	#define LTTNG_UST_CALIBRATE_PADDING1 16
	320	#define LTTNG_UST_CALIBRATE_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	321	struct lttng_ust_calibrate {
	322	enum lttng_ust_calibrate_type type; /* type (input) */
	323	char padding[LTTNG_UST_CALIBRATE_PADDING1];
	324
	325	union {
	326	char padding[LTTNG_UST_CALIBRATE_PADDING2];
	327	} u;
	328	} LTTNG_PACKED;
	329
	330	#define FILTER_BYTECODE_MAX_LEN 65536
	331	#define LTTNG_UST_FILTER_PADDING 32
	332	struct lttng_ust_filter_bytecode {
	333	uint32_t len;
	334	uint32_t reloc_offset;
	335	uint64_t seqnum;
	336	char padding[LTTNG_UST_FILTER_PADDING];
	337	char data[0];
	338	} LTTNG_PACKED;
	339
	340	#define CAPTURE_BYTECODE_MAX_LEN 65536
	341	#define LTTNG_UST_CAPTURE_PADDING 32
	342	struct lttng_ust_capture_bytecode {
	343	uint32_t len;
	344	uint32_t reloc_offset;
	345	uint64_t seqnum;
	346	char padding[LTTNG_UST_CAPTURE_PADDING];
	347	char data[0];
	348	} LTTNG_PACKED;
	349
	350	#define LTTNG_UST_EXCLUSION_PADDING 32
	351	struct lttng_ust_event_exclusion {
	352	uint32_t count;
	353	char padding[LTTNG_UST_EXCLUSION_PADDING];
	354	char names[LTTNG_UST_SYM_NAME_LEN][0];
	355	} LTTNG_PACKED;
	356
	357	#define _UST_CMD(minor) (minor)
	358	#define _UST_CMDR(minor, type) (minor)
	359	#define _UST_CMDW(minor, type) (minor)
	360
	361	/* Handled by object descriptor */
	362	#define LTTNG_UST_RELEASE _UST_CMD(0x1)
	363
	364	/* Handled by object cmd */
	365
	366	/* LTTng-UST commands */
	367	#define LTTNG_UST_SESSION _UST_CMD(0x40)
	368	#define LTTNG_UST_TRACER_VERSION \
	369	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
	370	#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
	371	#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
	372	#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
	373	#define LTTNG_UST_TRACEPOINT_FIELD_LIST _UST_CMD(0x45)
	374	#define LTTNG_UST_EVENT_NOTIFIER_GROUP_CREATE _UST_CMD(0x46)
	375
	376	/* Session commands */
	377	#define LTTNG_UST_CHANNEL \
	378	_UST_CMDW(0x51, struct lttng_ust_channel)
	379	#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
	380	#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
	381	#define LTTNG_UST_SESSION_STATEDUMP _UST_CMD(0x54)
	382
	383	/* Channel commands */
	384	#define LTTNG_UST_STREAM _UST_CMD(0x60)
	385	#define LTTNG_UST_EVENT \
	386	_UST_CMDW(0x61, struct lttng_ust_event)
	387
	388	/* Event and channel commands */
	389	#define LTTNG_UST_CONTEXT \
	390	_UST_CMDW(0x70, struct lttng_ust_context)
	391	#define LTTNG_UST_FLUSH_BUFFER \
	392	_UST_CMD(0x71)
	393
	394	/* Event, event notifier, channel and session commands */
	395	#define LTTNG_UST_ENABLE _UST_CMD(0x80)
	396	#define LTTNG_UST_DISABLE _UST_CMD(0x81)
	397
	398	/* Tracepoint list commands */
	399	#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
	400	#define LTTNG_UST_TRACEPOINT_FIELD_LIST_GET _UST_CMD(0x91)
	401
	402	/* Event and event notifier commands */
	403	#define LTTNG_UST_FILTER _UST_CMD(0xA0)
	404	#define LTTNG_UST_EXCLUSION _UST_CMD(0xA1)
	405
	406	/* Event notifier group commands */
	407	#define LTTNG_UST_EVENT_NOTIFIER_CREATE \
	408	_UST_CMDW(0xB0, struct lttng_ust_event_notifier)
	409
	410	/* Event notifier commands */
	411	#define LTTNG_UST_CAPTURE _UST_CMD(0xB6)
	412
	413	/* Session and event notifier group commands */
	414	#define LTTNG_UST_COUNTER \
	415	_UST_CMDW(0xC0, struct lttng_ust_counter)
	416
	417	/* Counter commands */
	418	#define LTTNG_UST_COUNTER_GLOBAL \
	419	_UST_CMDW(0xD0, struct lttng_ust_counter_global)
	420	#define LTTNG_UST_COUNTER_CPU \
	421	_UST_CMDW(0xD1, struct lttng_ust_counter_cpu)
	422
	423	#define LTTNG_UST_ROOT_HANDLE 0
	424
	425	struct lttng_ust_obj;
	426
	427	union ust_args {
	428	struct {
	429	void *chan_data;
	430	int wakeup_fd;
	431	} channel;
	432	struct {
	433	int shm_fd;
	434	int wakeup_fd;
	435	} stream;
	436	struct {
	437	struct lttng_ust_field_iter entry;
	438	} field_list;
	439	struct {
	440	char *ctxname;
	441	} app_context;
	442	struct {
	443	int event_notifier_notif_fd;
	444	} event_notifier_handle;
	445	struct {
	446	void *counter_data;
	447	} counter;
	448	struct {
	449	int shm_fd;
	450	} counter_shm;
	451	};
	452
	453	struct lttng_ust_objd_ops {
	454	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
	455	union ust_args args, void owner);
	456	int (*release)(int objd);
	457	};
	458
	459	/* Create root handle. Always ID 0. */
	460	int lttng_abi_create_root_handle(void);
	461
	462	const struct lttng_ust_objd_ops *objd_ops(int id);
	463	int lttng_ust_objd_unref(int id, int is_owner);
	464
	465	void lttng_ust_abi_exit(void);
	466	void lttng_ust_events_exit(void);
	467	void lttng_ust_objd_table_owner_cleanup(void *owner);
	468
	469	#endif /* _LTTNG_UST_ABI_H */