[lttng-tools.git] / src / bin / lttng-sessiond / ust-abi-internal.h

/*
 * Copyright 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * SPDX-License-Identifier: MIT
 *
 * Copied from LTTng-UST lttng/ust-abi.h
 *
 * LTTng-UST ABI header
 *
 */

#ifndef LTTNG_UST_ABI_INTERNAL_H
#define LTTNG_UST_ABI_INTERNAL_H

#include <stdint.h>
#include <common/macros.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		8
#define LTTNG_UST_ABI_MINOR_VERSION		1

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_TRIGGER_PADDING1	16
#define LTTNG_UST_TRIGGER_PADDING2	(LTTNG_UST_SYM_NAME_LEN + 32)
struct lttng_ust_trigger {
	uint64_t id;
	uint64_t error_counter_idx;
	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 */
	char padding[LTTNG_UST_TRIGGER_PADDING1];

	/* Per instrumentation type configuration */
	union {
		char padding[LTTNG_UST_TRIGGER_PADDING2];
	} u;
} LTTNG_PACKED;

#define LTTNG_TRIGGER_NOTIFICATION_PADDING 32
struct lttng_ust_trigger_notification {
	uint64_t id;
	uint16_t capture_buf_size;
	char padding[LTTNG_TRIGGER_NOTIFICATION_PADDING];
} LTTNG_PACKED;

#define LTTNG_UST_EVENT_PADDING1	16
#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 */
	char padding[LTTNG_UST_EVENT_PADDING1];

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

#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;
		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)

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

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

/* Event, 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 FD commands */
#define LTTNG_UST_FILTER			_UST_CMD(0xA0)
#define LTTNG_UST_EXCLUSION			_UST_CMD(0xA1)

#define LTTNG_UST_TRIGGER_SEND_FD		_UST_CMD(0xB0)
#define LTTNG_UST_TRIGGER_CREATE		_UST_CMDW(0xB1, struct lttng_ust_trigger)

#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 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_INTERNAL_H */
Commit	Line	Data
75018ab6	1	/*
ab5be9fa	2	* Copyright 2010-2012 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
75018ab6	3	*
ab5be9fa	4	* SPDX-License-Identifier: MIT
75018ab6	5	*
ab5be9fa	6	* Copied from LTTng-UST lttng/ust-abi.h
75018ab6	7	*
ab5be9fa	8	* LTTng-UST ABI header
75018ab6	9	*
75018ab6 JG	10	*/
	11
	12	#ifndef LTTNG_UST_ABI_INTERNAL_H
	13	#define LTTNG_UST_ABI_INTERNAL_H
	14
	15	#include <stdint.h>
fe7de4bf	16	#include <common/macros.h>
75018ab6	17
95194333 JG	18	#ifndef LTTNG_PACKED
	19	#error "LTTNG_PACKED should be defined"
	20	#endif
75018ab6 JG	21
	22	#ifndef __ust_stringify
	23	#define __ust_stringify1(x) #x
	24	#define __ust_stringify(x) __ust_stringify1(x)
	25	#endif /* __ust_stringify */
	26
	27	#define LTTNG_UST_SYM_NAME_LEN 256
	28	#define LTTNG_UST_ABI_PROCNAME_LEN 16
	29
	30	/* UST comm magic number, used to validate protocol and endianness. */
	31	#define LTTNG_UST_COMM_MAGIC 0xC57C57C5
	32
	33	/* Version for ABI between liblttng-ust, sessiond, consumerd */
	34	#define LTTNG_UST_ABI_MAJOR_VERSION 8
208ddc06	35	#define LTTNG_UST_ABI_MINOR_VERSION 1
75018ab6	36
75018ab6 JG	37	enum lttng_ust_instrumentation {
	38	LTTNG_UST_TRACEPOINT = 0,
	39	LTTNG_UST_PROBE = 1,
	40	LTTNG_UST_FUNCTION = 2,
	41	};
	42
	43	enum lttng_ust_loglevel_type {
	44	LTTNG_UST_LOGLEVEL_ALL = 0,
	45	LTTNG_UST_LOGLEVEL_RANGE = 1,
	46	LTTNG_UST_LOGLEVEL_SINGLE = 2,
	47	};
	48
	49	enum lttng_ust_output {
	50	LTTNG_UST_MMAP = 0,
	51	};
	52
	53	enum lttng_ust_chan_type {
	54	LTTNG_UST_CHAN_PER_CPU = 0,
	55	LTTNG_UST_CHAN_METADATA = 1,
	56	};
	57
	58	struct lttng_ust_tracer_version {
	59	uint32_t major;
	60	uint32_t minor;
	61	uint32_t patchlevel;
	62	} LTTNG_PACKED;
	63
	64	#define LTTNG_UST_CHANNEL_PADDING (LTTNG_UST_SYM_NAME_LEN + 32)
	65	/*
	66	* Given that the consumerd is limited to 64k file descriptors, we
	67	* cannot expect much more than 1MB channel structure size. This size is
	68	* depends on the number of streams within a channel, which depends on
	69	* the number of possible CPUs on the system.
	70	*/
	71	#define LTTNG_UST_CHANNEL_DATA_MAX_LEN 1048576U
	72	struct lttng_ust_channel {
	73	uint64_t len;
	74	enum lttng_ust_chan_type type;
	75	char padding[LTTNG_UST_CHANNEL_PADDING];
	76	char data[]; /* variable sized data */
	77	} LTTNG_PACKED;
	78
	79	#define LTTNG_UST_STREAM_PADDING1 (LTTNG_UST_SYM_NAME_LEN + 32)
	80	struct lttng_ust_stream {
	81	uint64_t len; /* shm len */
	82	uint32_t stream_nr; /* stream number */
	83	char padding[LTTNG_UST_STREAM_PADDING1];
	84	/*
	85	* shm_fd and wakeup_fd are send over unix socket as file
	86	* descriptors after this structure.
	87	*/
	88	} LTTNG_PACKED;
	89
2463b787 JR	90	#define LTTNG_UST_TRIGGER_PADDING1 16
	91	#define LTTNG_UST_TRIGGER_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	92	struct lttng_ust_trigger {
	93	uint64_t id;
	94	uint64_t error_counter_idx;
	95	enum lttng_ust_instrumentation instrumentation;
	96	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	97
	98	enum lttng_ust_loglevel_type loglevel_type;
	99	int loglevel; /* value, -1: all */
	100	char padding[LTTNG_UST_TRIGGER_PADDING1];
	101
	102	/* Per instrumentation type configuration */
	103	union {
	104	char padding[LTTNG_UST_TRIGGER_PADDING2];
	105	} u;
	106	} LTTNG_PACKED;
	107
	108	#define LTTNG_TRIGGER_NOTIFICATION_PADDING 32
	109	struct lttng_ust_trigger_notification {
	110	uint64_t id;
	111	uint16_t capture_buf_size;
	112	char padding[LTTNG_TRIGGER_NOTIFICATION_PADDING];
	113	} LTTNG_PACKED;
	114
75018ab6 JG	115	#define LTTNG_UST_EVENT_PADDING1 16
	116	#define LTTNG_UST_EVENT_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	117	struct lttng_ust_event {
	118	enum lttng_ust_instrumentation instrumentation;
	119	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	120
	121	enum lttng_ust_loglevel_type loglevel_type;
	122	int loglevel; /* value, -1: all */
	123	char padding[LTTNG_UST_EVENT_PADDING1];
	124
	125	/* Per instrumentation type configuration */
	126	union {
	127	char padding[LTTNG_UST_EVENT_PADDING2];
	128	} u;
	129	} LTTNG_PACKED;
	130
	131	enum lttng_ust_field_type {
	132	LTTNG_UST_FIELD_OTHER = 0,
	133	LTTNG_UST_FIELD_INTEGER = 1,
	134	LTTNG_UST_FIELD_ENUM = 2,
	135	LTTNG_UST_FIELD_FLOAT = 3,
	136	LTTNG_UST_FIELD_STRING = 4,
	137	};
	138
	139	#define LTTNG_UST_FIELD_ITER_PADDING (LTTNG_UST_SYM_NAME_LEN + 28)
	140	struct lttng_ust_field_iter {
	141	char event_name[LTTNG_UST_SYM_NAME_LEN];
	142	char field_name[LTTNG_UST_SYM_NAME_LEN];
	143	enum lttng_ust_field_type type;
	144	int loglevel; /* event loglevel */
	145	int nowrite;
	146	char padding[LTTNG_UST_FIELD_ITER_PADDING];
	147	} LTTNG_PACKED;
	148
	149	enum lttng_ust_context_type {
	150	LTTNG_UST_CONTEXT_VTID = 0,
	151	LTTNG_UST_CONTEXT_VPID = 1,
	152	LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
	153	LTTNG_UST_CONTEXT_PROCNAME = 3,
	154	LTTNG_UST_CONTEXT_IP = 4,
	155	LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER = 5,
	156	LTTNG_UST_CONTEXT_CPU_ID = 6,
	157	LTTNG_UST_CONTEXT_APP_CONTEXT = 7,
95194333 JG	158	LTTNG_UST_CONTEXT_CGROUP_NS = 8,
	159	LTTNG_UST_CONTEXT_IPC_NS = 9,
	160	LTTNG_UST_CONTEXT_MNT_NS = 10,
	161	LTTNG_UST_CONTEXT_NET_NS = 11,
	162	LTTNG_UST_CONTEXT_PID_NS = 12,
	163	LTTNG_UST_CONTEXT_USER_NS = 13,
	164	LTTNG_UST_CONTEXT_UTS_NS = 14,
	165	LTTNG_UST_CONTEXT_VUID = 15,
	166	LTTNG_UST_CONTEXT_VEUID = 16,
	167	LTTNG_UST_CONTEXT_VSUID = 17,
	168	LTTNG_UST_CONTEXT_VGID = 18,
	169	LTTNG_UST_CONTEXT_VEGID = 19,
	170	LTTNG_UST_CONTEXT_VSGID = 20,
d37ac3cd	171	LTTNG_UST_CONTEXT_TIME_NS = 21,
75018ab6 JG	172	};
	173
	174	struct lttng_ust_perf_counter_ctx {
	175	uint32_t type;
	176	uint64_t config;
	177	char name[LTTNG_UST_SYM_NAME_LEN];
	178	} LTTNG_PACKED;
	179
	180	#define LTTNG_UST_CONTEXT_PADDING1 16
	181	#define LTTNG_UST_CONTEXT_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	182	struct lttng_ust_context {
	183	enum lttng_ust_context_type ctx;
	184	char padding[LTTNG_UST_CONTEXT_PADDING1];
	185
	186	union {
	187	struct lttng_ust_perf_counter_ctx perf_counter;
	188	struct {
	189	/* Includes trailing '\0'. */
	190	uint32_t provider_name_len;
	191	uint32_t ctx_name_len;
	192	} app_ctx;
	193	char padding[LTTNG_UST_CONTEXT_PADDING2];
	194	} u;
	195	} LTTNG_PACKED;
	196
	197	/*
	198	* Tracer channel attributes.
	199	*/
	200	#define LTTNG_UST_CHANNEL_ATTR_PADDING (LTTNG_UST_SYM_NAME_LEN + 32)
	201	struct lttng_ust_channel_attr {
95194333	202	uint64_t subbuf_size; /* bytes */
75018ab6 JG	203	uint64_t num_subbuf; /* power of 2 */
	204	int overwrite; /* 1: overwrite, 0: discard */
	205	unsigned int switch_timer_interval; /* usec */
	206	unsigned int read_timer_interval; /* usec */
	207	enum lttng_ust_output output; /* splice, mmap */
	208	union {
	209	struct {
95194333	210	int64_t blocking_timeout; /* Blocking timeout (usec) */
75018ab6 JG	211	} s;
	212	char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
	213	} u;
	214	} LTTNG_PACKED;
	215
	216	#define LTTNG_UST_TRACEPOINT_ITER_PADDING 16
	217	struct lttng_ust_tracepoint_iter {
	218	char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */
	219	int loglevel;
	220	char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
	221	} LTTNG_PACKED;
	222
	223	enum lttng_ust_object_type {
	224	LTTNG_UST_OBJECT_TYPE_UNKNOWN = -1,
	225	LTTNG_UST_OBJECT_TYPE_CHANNEL = 0,
	226	LTTNG_UST_OBJECT_TYPE_STREAM = 1,
	227	LTTNG_UST_OBJECT_TYPE_EVENT = 2,
	228	LTTNG_UST_OBJECT_TYPE_CONTEXT = 3,
	229	};
	230
	231	#define LTTNG_UST_OBJECT_DATA_PADDING1 32
	232	#define LTTNG_UST_OBJECT_DATA_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	233
	234	struct lttng_ust_object_data {
	235	enum lttng_ust_object_type type;
	236	int handle;
	237	uint64_t size;
	238	char padding1[LTTNG_UST_OBJECT_DATA_PADDING1];
	239	union {
	240	struct {
	241	void *data;
	242	enum lttng_ust_chan_type type;
	243	int wakeup_fd;
	244	} channel;
	245	struct {
	246	int shm_fd;
	247	int wakeup_fd;
	248	uint32_t stream_nr;
	249	} stream;
	250	char padding2[LTTNG_UST_OBJECT_DATA_PADDING2];
	251	} u;
	252	} LTTNG_PACKED;
	253
95194333 JG	254	enum lttng_ust_calibrate_type {
	255	LTTNG_UST_CALIBRATE_TRACEPOINT,
	256	};
	257
	258	#define LTTNG_UST_CALIBRATE_PADDING1 16
	259	#define LTTNG_UST_CALIBRATE_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	260	struct lttng_ust_calibrate {
	261	enum lttng_ust_calibrate_type type; /* type (input) */
	262	char padding[LTTNG_UST_CALIBRATE_PADDING1];
	263
	264	union {
	265	char padding[LTTNG_UST_CALIBRATE_PADDING2];
	266	} u;
	267	} LTTNG_PACKED;
	268
75018ab6 JG	269	#define FILTER_BYTECODE_MAX_LEN 65536
	270	#define LTTNG_UST_FILTER_PADDING 32
	271	struct lttng_ust_filter_bytecode {
	272	uint32_t len;
	273	uint32_t reloc_offset;
	274	uint64_t seqnum;
	275	char padding[LTTNG_UST_FILTER_PADDING];
	276	char data[0];
	277	} LTTNG_PACKED;
	278
2463b787 JR	279	#define CAPTURE_BYTECODE_MAX_LEN 65536
	280	#define LTTNG_UST_CAPTURE_PADDING 32
	281	struct lttng_ust_capture_bytecode {
	282	uint32_t len;
	283	uint32_t reloc_offset;
	284	uint64_t seqnum;
	285	char padding[LTTNG_UST_CAPTURE_PADDING];
	286	char data[0];
	287	} LTTNG_PACKED;
	288
75018ab6 JG	289	#define LTTNG_UST_EXCLUSION_PADDING 32
	290	struct lttng_ust_event_exclusion {
	291	uint32_t count;
	292	char padding[LTTNG_UST_EXCLUSION_PADDING];
	293	char names[LTTNG_UST_SYM_NAME_LEN][0];
	294	} LTTNG_PACKED;
	295
	296	#define _UST_CMD(minor) (minor)
	297	#define _UST_CMDR(minor, type) (minor)
	298	#define _UST_CMDW(minor, type) (minor)
	299
	300	/* Handled by object descriptor */
	301	#define LTTNG_UST_RELEASE _UST_CMD(0x1)
	302
	303	/* Handled by object cmd */
	304
	305	/* LTTng-UST commands */
	306	#define LTTNG_UST_SESSION _UST_CMD(0x40)
	307	#define LTTNG_UST_TRACER_VERSION \
	308	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
	309	#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
	310	#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
	311	#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
	312	#define LTTNG_UST_TRACEPOINT_FIELD_LIST _UST_CMD(0x45)
	313
	314	/* Session FD commands */
	315	#define LTTNG_UST_CHANNEL \
	316	_UST_CMDW(0x51, struct lttng_ust_channel)
	317	#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
	318	#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
	319	#define LTTNG_UST_SESSION_STATEDUMP _UST_CMD(0x54)
	320
	321	/* Channel FD commands */
	322	#define LTTNG_UST_STREAM _UST_CMD(0x60)
	323	#define LTTNG_UST_EVENT \
	324	_UST_CMDW(0x61, struct lttng_ust_event)
	325
	326	/* Event and Channel FD commands */
	327	#define LTTNG_UST_CONTEXT \
	328	_UST_CMDW(0x70, struct lttng_ust_context)
	329	#define LTTNG_UST_FLUSH_BUFFER \
	330	_UST_CMD(0x71)
	331
	332	/* Event, Channel and Session commands */
	333	#define LTTNG_UST_ENABLE _UST_CMD(0x80)
	334	#define LTTNG_UST_DISABLE _UST_CMD(0x81)
	335
	336	/* Tracepoint list commands */
	337	#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
	338	#define LTTNG_UST_TRACEPOINT_FIELD_LIST_GET _UST_CMD(0x91)
	339
	340	/* Event FD commands */
	341	#define LTTNG_UST_FILTER _UST_CMD(0xA0)
95194333	342	#define LTTNG_UST_EXCLUSION _UST_CMD(0xA1)
75018ab6	343
2463b787 JR	344	#define LTTNG_UST_TRIGGER_SEND_FD _UST_CMD(0xB0)
	345	#define LTTNG_UST_TRIGGER_CREATE _UST_CMDW(0xB1, struct lttng_ust_trigger)
	346
75018ab6 JG	347	#define LTTNG_UST_ROOT_HANDLE 0
	348
	349	struct lttng_ust_obj;
	350
	351	union ust_args {
	352	struct {
	353	void *chan_data;
	354	int wakeup_fd;
	355	} channel;
	356	struct {
	357	int shm_fd;
	358	int wakeup_fd;
	359	} stream;
	360	struct {
	361	struct lttng_ust_field_iter entry;
	362	} field_list;
95194333 JG	363	struct {
	364	char *ctxname;
	365	} app_context;
75018ab6 JG	366	};
	367
	368	struct lttng_ust_objd_ops {
	369	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
	370	union ust_args args, void owner);
	371	int (*release)(int objd);
	372	};
	373
	374	/* Create root handle. Always ID 0. */
	375	int lttng_abi_create_root_handle(void);
	376
	377	const struct lttng_ust_objd_ops *objd_ops(int id);
	378	int lttng_ust_objd_unref(int id, int is_owner);
	379
	380	void lttng_ust_abi_exit(void);
	381	void lttng_ust_events_exit(void);
	382	void lttng_ust_objd_table_owner_cleanup(void *owner);
	383
	384	#endif /* LTTNG_UST_ABI_INTERNAL_H */