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

#ifndef _LTTNG_UST_ABI_H
#define _LTTNG_UST_ABI_H

/*
 * lttng/ust-abi.h
 *
 * LTTng-UST ABI header
 *
 * Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

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

#define LTTNG_UST_SYM_NAME_LEN	256

/* Version for comm protocol between sessiond and ust */
#define LTTNG_UST_COMM_VERSION_MAJOR		2
#define LTTNG_UST_COMM_VERSION_MINOR		1

/* Version for ABI between liblttng-ust, sessiond, consumerd */
#define LTTNG_UST_INTERNAL_MAJOR_VERSION	3
#define LTTNG_UST_INTERNAL_MINOR_VERSION	0
#define LTTNG_UST_INTERNAL_PATCHLEVEL_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_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,
};

#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 {
		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 */
	char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
} 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,
};

#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;
		} 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 _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_METADATA			\
	_UST_CMDW(0x50, struct lttng_ust_channel)
#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)

/* 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_ROOT_HANDLE	0

struct lttng_ust_obj;

union ust_args {
	struct {
		void *chan_data;
	} channel;
	struct {
		int shm_fd;
		int wakeup_fd;
	} stream;
	struct {
		struct lttng_ust_field_iter entry;
	} field_list;
};

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);

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	#ifndef _LTTNG_UST_ABI_H
	2	#define _LTTNG_UST_ABI_H
	3
	4	/*
	5	* lttng/ust-abi.h
	6	*
	7	* LTTng-UST ABI header
	8	*
	9	* Copyright 2010-2012 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	10	*
	11	* Permission is hereby granted, free of charge, to any person obtaining a copy
	12	* of this software and associated documentation files (the "Software"), to deal
	13	* in the Software without restriction, including without limitation the rights
	14	* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
	15	* copies of the Software, and to permit persons to whom the Software is
	16	* furnished to do so, subject to the following conditions:
	17	*
	18	* The above copyright notice and this permission notice shall be included in
	19	* all copies or substantial portions of the Software.
	20	*
	21	* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
	22	* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
	23	* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
	24	* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
	25	* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
	26	* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
	27	* SOFTWARE.
	28	*/
	29
	30	#include <stdint.h>
	31	#include <lttng/ust-compiler.h>
	32
	33	#define LTTNG_UST_SYM_NAME_LEN 256
	34
	35	/* Version for comm protocol between sessiond and ust */
	36	#define LTTNG_UST_COMM_VERSION_MAJOR 2
	37	#define LTTNG_UST_COMM_VERSION_MINOR 1
	38
	39	/* Version for ABI between liblttng-ust, sessiond, consumerd */
	40	#define LTTNG_UST_INTERNAL_MAJOR_VERSION 3
	41	#define LTTNG_UST_INTERNAL_MINOR_VERSION 0
	42	#define LTTNG_UST_INTERNAL_PATCHLEVEL_VERSION 0
	43
	44	enum lttng_ust_instrumentation {
	45	LTTNG_UST_TRACEPOINT = 0,
	46	LTTNG_UST_PROBE = 1,
	47	LTTNG_UST_FUNCTION = 2,
	48	};
	49
	50	enum lttng_ust_loglevel_type {
	51	LTTNG_UST_LOGLEVEL_ALL = 0,
	52	LTTNG_UST_LOGLEVEL_RANGE = 1,
	53	LTTNG_UST_LOGLEVEL_SINGLE = 2,
	54	};
	55
	56	enum lttng_ust_output {
	57	LTTNG_UST_MMAP = 0,
	58	};
	59
	60	enum lttng_ust_chan_type {
	61	LTTNG_UST_CHAN_PER_CPU = 0,
	62	LTTNG_UST_CHAN_METADATA = 1,
	63	};
	64
	65	struct lttng_ust_tracer_version {
	66	uint32_t major;
	67	uint32_t minor;
	68	uint32_t patchlevel;
	69	} LTTNG_PACKED;
	70
	71	#define LTTNG_UST_CHANNEL_PADDING LTTNG_UST_SYM_NAME_LEN + 32
	72	/*
	73	* Given that the consumerd is limited to 64k file descriptors, we
	74	* cannot expect much more than 1MB channel structure size. This size is
	75	* depends on the number of streams within a channel, which depends on
	76	* the number of possible CPUs on the system.
	77	*/
	78	#define LTTNG_UST_CHANNEL_DATA_MAX_LEN 1048576U
	79	struct lttng_ust_channel {
	80	uint64_t len;
	81	enum lttng_ust_chan_type type;
	82	char padding[LTTNG_UST_CHANNEL_PADDING];
	83	char data[]; /* variable sized data */
	84	} LTTNG_PACKED;
	85
	86	#define LTTNG_UST_STREAM_PADDING1 LTTNG_UST_SYM_NAME_LEN + 32
	87	struct lttng_ust_stream {
	88	uint64_t len; /* shm len */
	89	uint32_t stream_nr; /* stream number */
	90	char padding[LTTNG_UST_STREAM_PADDING1];
	91	/*
	92	* shm_fd and wakeup_fd are send over unix socket as file
	93	* descriptors after this structure.
	94	*/
	95	} LTTNG_PACKED;
	96
	97	#define LTTNG_UST_EVENT_PADDING1 16
	98	#define LTTNG_UST_EVENT_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	99	struct lttng_ust_event {
	100	enum lttng_ust_instrumentation instrumentation;
	101	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	102
	103	enum lttng_ust_loglevel_type loglevel_type;
	104	int loglevel; /* value, -1: all */
	105	char padding[LTTNG_UST_EVENT_PADDING1];
	106
	107	/* Per instrumentation type configuration */
	108	union {
	109	char padding[LTTNG_UST_EVENT_PADDING2];
	110	} u;
	111	} LTTNG_PACKED;
	112
	113	enum lttng_ust_field_type {
	114	LTTNG_UST_FIELD_OTHER = 0,
	115	LTTNG_UST_FIELD_INTEGER = 1,
	116	LTTNG_UST_FIELD_ENUM = 2,
	117	LTTNG_UST_FIELD_FLOAT = 3,
	118	LTTNG_UST_FIELD_STRING = 4,
	119	};
	120
	121	#define LTTNG_UST_FIELD_ITER_PADDING LTTNG_UST_SYM_NAME_LEN + 28
	122	struct lttng_ust_field_iter {
	123	char event_name[LTTNG_UST_SYM_NAME_LEN];
	124	char field_name[LTTNG_UST_SYM_NAME_LEN];
	125	enum lttng_ust_field_type type;
	126	int loglevel; /* event loglevel */
	127	int nowrite;
	128	char padding[LTTNG_UST_FIELD_ITER_PADDING];
	129	} LTTNG_PACKED;
	130
	131	enum lttng_ust_context_type {
	132	LTTNG_UST_CONTEXT_VTID = 0,
	133	LTTNG_UST_CONTEXT_VPID = 1,
	134	LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
	135	LTTNG_UST_CONTEXT_PROCNAME = 3,
	136	};
	137
	138	#define LTTNG_UST_CONTEXT_PADDING1 16
	139	#define LTTNG_UST_CONTEXT_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	140	struct lttng_ust_context {
	141	enum lttng_ust_context_type ctx;
	142	char padding[LTTNG_UST_CONTEXT_PADDING1];
	143
	144	union {
	145	char padding[LTTNG_UST_CONTEXT_PADDING2];
	146	} u;
	147	} LTTNG_PACKED;
	148
	149	/*
	150	* Tracer channel attributes.
	151	*/
	152	#define LTTNG_UST_CHANNEL_ATTR_PADDING LTTNG_UST_SYM_NAME_LEN + 32
	153	struct lttng_ust_channel_attr {
	154	uint64_t subbuf_size; /* bytes */
	155	uint64_t num_subbuf; /* power of 2 */
	156	int overwrite; /* 1: overwrite, 0: discard */
	157	unsigned int switch_timer_interval; /* usec */
	158	unsigned int read_timer_interval; /* usec */
	159	enum lttng_ust_output output; /* splice, mmap */
	160	char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
	161	} LTTNG_PACKED;
	162
	163	#define LTTNG_UST_TRACEPOINT_ITER_PADDING 16
	164	struct lttng_ust_tracepoint_iter {
	165	char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */
	166	int loglevel;
	167	char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
	168	} LTTNG_PACKED;
	169
	170	enum lttng_ust_object_type {
	171	LTTNG_UST_OBJECT_TYPE_UNKNOWN = -1,
	172	LTTNG_UST_OBJECT_TYPE_CHANNEL = 0,
	173	LTTNG_UST_OBJECT_TYPE_STREAM = 1,
	174	};
	175
	176	#define LTTNG_UST_OBJECT_DATA_PADDING1 32
	177	#define LTTNG_UST_OBJECT_DATA_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	178
	179	struct lttng_ust_object_data {
	180	enum lttng_ust_object_type type;
	181	int handle;
	182	uint64_t size;
	183	char padding1[LTTNG_UST_OBJECT_DATA_PADDING1];
	184	union {
	185	struct {
	186	void *data;
	187	enum lttng_ust_chan_type type;
	188	} channel;
	189	struct {
	190	int shm_fd;
	191	int wakeup_fd;
	192	uint32_t stream_nr;
	193	} stream;
	194	char padding2[LTTNG_UST_OBJECT_DATA_PADDING2];
	195	} u;
	196	} LTTNG_PACKED;
	197
	198	enum lttng_ust_calibrate_type {
	199	LTTNG_UST_CALIBRATE_TRACEPOINT,
	200	};
	201
	202	#define LTTNG_UST_CALIBRATE_PADDING1 16
	203	#define LTTNG_UST_CALIBRATE_PADDING2 LTTNG_UST_SYM_NAME_LEN + 32
	204	struct lttng_ust_calibrate {
	205	enum lttng_ust_calibrate_type type; /* type (input) */
	206	char padding[LTTNG_UST_CALIBRATE_PADDING1];
	207
	208	union {
	209	char padding[LTTNG_UST_CALIBRATE_PADDING2];
	210	} u;
	211	} LTTNG_PACKED;
	212
	213	#define FILTER_BYTECODE_MAX_LEN 65536
	214	#define LTTNG_UST_FILTER_PADDING 32
	215	struct lttng_ust_filter_bytecode {
	216	uint32_t len;
	217	uint32_t reloc_offset;
	218	uint64_t seqnum;
	219	char padding[LTTNG_UST_FILTER_PADDING];
	220	char data[0];
	221	} LTTNG_PACKED;
	222
	223	#define _UST_CMD(minor) (minor)
	224	#define _UST_CMDR(minor, type) (minor)
	225	#define _UST_CMDW(minor, type) (minor)
	226
	227	/* Handled by object descriptor */
	228	#define LTTNG_UST_RELEASE _UST_CMD(0x1)
	229
	230	/* Handled by object cmd */
	231
	232	/* LTTng-UST commands */
	233	#define LTTNG_UST_SESSION _UST_CMD(0x40)
	234	#define LTTNG_UST_TRACER_VERSION \
	235	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
	236	#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
	237	#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
	238	#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
	239	#define LTTNG_UST_TRACEPOINT_FIELD_LIST _UST_CMD(0x45)
	240
	241	/* Session FD commands */
	242	#define LTTNG_UST_METADATA \
	243	_UST_CMDW(0x50, struct lttng_ust_channel)
	244	#define LTTNG_UST_CHANNEL \
	245	_UST_CMDW(0x51, struct lttng_ust_channel)
	246	#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
	247	#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
	248
	249	/* Channel FD commands */
	250	#define LTTNG_UST_STREAM _UST_CMD(0x60)
	251	#define LTTNG_UST_EVENT \
	252	_UST_CMDW(0x61, struct lttng_ust_event)
	253
	254	/* Event and Channel FD commands */
	255	#define LTTNG_UST_CONTEXT \
	256	_UST_CMDW(0x70, struct lttng_ust_context)
	257	#define LTTNG_UST_FLUSH_BUFFER \
	258	_UST_CMD(0x71)
	259
	260	/* Event, Channel and Session commands */
	261	#define LTTNG_UST_ENABLE _UST_CMD(0x80)
	262	#define LTTNG_UST_DISABLE _UST_CMD(0x81)
	263
	264	/* Tracepoint list commands */
	265	#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
	266	#define LTTNG_UST_TRACEPOINT_FIELD_LIST_GET _UST_CMD(0x91)
	267
	268	/* Event FD commands */
	269	#define LTTNG_UST_FILTER _UST_CMD(0xA0)
	270
	271	#define LTTNG_UST_ROOT_HANDLE 0
	272
	273	struct lttng_ust_obj;
	274
	275	union ust_args {
	276	struct {
	277	void *chan_data;
	278	} channel;
	279	struct {
	280	int shm_fd;
	281	int wakeup_fd;
	282	} stream;
	283	struct {
	284	struct lttng_ust_field_iter entry;
	285	} field_list;
	286	};
	287
	288	struct lttng_ust_objd_ops {
	289	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
	290	union ust_args args, void owner);
	291	int (*release)(int objd);
	292	};
	293
	294	/* Create root handle. Always ID 0. */
	295	int lttng_abi_create_root_handle(void);
	296
	297	const struct lttng_ust_objd_ops *objd_ops(int id);
	298	int lttng_ust_objd_unref(int id);
	299
	300	void lttng_ust_abi_exit(void);
	301	void lttng_ust_events_exit(void);
	302	void lttng_ust_objd_table_owner_cleanup(void *owner);
	303
	304	#endif /* _LTTNG_UST_ABI_H */