[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>

#define lttng_ust_notrace __attribute__((no_instrument_function))
#define LTTNG_PACKED    __attribute__((__packed__))

#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		7
#define LTTNG_UST_ABI_MINOR_VERSION		1

struct lttng_ust_calibrate;

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,
	LTTNG_UST_CONTEXT_IP			= 4,
	LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER	= 5,
	LTTNG_UST_CONTEXT_CPU_ID		= 6,
	LTTNG_UST_CONTEXT_APP_CONTEXT		= 7,
};

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, power of 2 */
	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,
	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;

#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 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_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 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	#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
	32	#define lttng_ust_notrace __attribute__((no_instrument_function))
	33	#define LTTNG_PACKED __attribute__((__packed__))
	34
	35	#ifndef __ust_stringify
	36	#define __ust_stringify1(x) #x
	37	#define __ust_stringify(x) __ust_stringify1(x)
	38	#endif /* __ust_stringify */
	39
	40	#define LTTNG_UST_SYM_NAME_LEN 256
	41	#define LTTNG_UST_ABI_PROCNAME_LEN 16
	42
	43	/* UST comm magic number, used to validate protocol and endianness. */
	44	#define LTTNG_UST_COMM_MAGIC 0xC57C57C5
	45
	46	/* Version for ABI between liblttng-ust, sessiond, consumerd */
	47	#define LTTNG_UST_ABI_MAJOR_VERSION 7
	48	#define LTTNG_UST_ABI_MINOR_VERSION 1
	49
	50	struct lttng_ust_calibrate;
	51
	52	enum lttng_ust_instrumentation {
	53	LTTNG_UST_TRACEPOINT = 0,
	54	LTTNG_UST_PROBE = 1,
	55	LTTNG_UST_FUNCTION = 2,
	56	};
	57
	58	enum lttng_ust_loglevel_type {
	59	LTTNG_UST_LOGLEVEL_ALL = 0,
	60	LTTNG_UST_LOGLEVEL_RANGE = 1,
	61	LTTNG_UST_LOGLEVEL_SINGLE = 2,
	62	};
	63
	64	enum lttng_ust_output {
	65	LTTNG_UST_MMAP = 0,
	66	};
	67
	68	enum lttng_ust_chan_type {
	69	LTTNG_UST_CHAN_PER_CPU = 0,
	70	LTTNG_UST_CHAN_METADATA = 1,
	71	};
	72
	73	struct lttng_ust_tracer_version {
	74	uint32_t major;
	75	uint32_t minor;
	76	uint32_t patchlevel;
	77	} LTTNG_PACKED;
	78
	79	#define LTTNG_UST_CHANNEL_PADDING (LTTNG_UST_SYM_NAME_LEN + 32)
	80	/*
	81	* Given that the consumerd is limited to 64k file descriptors, we
	82	* cannot expect much more than 1MB channel structure size. This size is
	83	* depends on the number of streams within a channel, which depends on
	84	* the number of possible CPUs on the system.
	85	*/
	86	#define LTTNG_UST_CHANNEL_DATA_MAX_LEN 1048576U
	87	struct lttng_ust_channel {
	88	uint64_t len;
	89	enum lttng_ust_chan_type type;
	90	char padding[LTTNG_UST_CHANNEL_PADDING];
	91	char data[]; /* variable sized data */
	92	} LTTNG_PACKED;
	93
	94	#define LTTNG_UST_STREAM_PADDING1 (LTTNG_UST_SYM_NAME_LEN + 32)
	95	struct lttng_ust_stream {
	96	uint64_t len; /* shm len */
	97	uint32_t stream_nr; /* stream number */
	98	char padding[LTTNG_UST_STREAM_PADDING1];
	99	/*
	100	* shm_fd and wakeup_fd are send over unix socket as file
	101	* descriptors after this structure.
	102	*/
	103	} LTTNG_PACKED;
	104
	105	#define LTTNG_UST_EVENT_PADDING1 16
	106	#define LTTNG_UST_EVENT_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	107	struct lttng_ust_event {
	108	enum lttng_ust_instrumentation instrumentation;
	109	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	110
	111	enum lttng_ust_loglevel_type loglevel_type;
	112	int loglevel; /* value, -1: all */
	113	char padding[LTTNG_UST_EVENT_PADDING1];
	114
	115	/* Per instrumentation type configuration */
	116	union {
	117	char padding[LTTNG_UST_EVENT_PADDING2];
	118	} u;
	119	} LTTNG_PACKED;
	120
	121	enum lttng_ust_field_type {
	122	LTTNG_UST_FIELD_OTHER = 0,
	123	LTTNG_UST_FIELD_INTEGER = 1,
	124	LTTNG_UST_FIELD_ENUM = 2,
	125	LTTNG_UST_FIELD_FLOAT = 3,
	126	LTTNG_UST_FIELD_STRING = 4,
	127	};
	128
	129	#define LTTNG_UST_FIELD_ITER_PADDING (LTTNG_UST_SYM_NAME_LEN + 28)
	130	struct lttng_ust_field_iter {
	131	char event_name[LTTNG_UST_SYM_NAME_LEN];
	132	char field_name[LTTNG_UST_SYM_NAME_LEN];
	133	enum lttng_ust_field_type type;
	134	int loglevel; /* event loglevel */
	135	int nowrite;
	136	char padding[LTTNG_UST_FIELD_ITER_PADDING];
	137	} LTTNG_PACKED;
	138
	139	enum lttng_ust_context_type {
	140	LTTNG_UST_CONTEXT_VTID = 0,
	141	LTTNG_UST_CONTEXT_VPID = 1,
	142	LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
	143	LTTNG_UST_CONTEXT_PROCNAME = 3,
	144	LTTNG_UST_CONTEXT_IP = 4,
	145	LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER = 5,
	146	LTTNG_UST_CONTEXT_CPU_ID = 6,
	147	LTTNG_UST_CONTEXT_APP_CONTEXT = 7,
	148	};
	149
	150	struct lttng_ust_perf_counter_ctx {
	151	uint32_t type;
	152	uint64_t config;
	153	char name[LTTNG_UST_SYM_NAME_LEN];
	154	} LTTNG_PACKED;
	155
	156	#define LTTNG_UST_CONTEXT_PADDING1 16
	157	#define LTTNG_UST_CONTEXT_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	158	struct lttng_ust_context {
	159	enum lttng_ust_context_type ctx;
	160	char padding[LTTNG_UST_CONTEXT_PADDING1];
	161
	162	union {
	163	struct lttng_ust_perf_counter_ctx perf_counter;
	164	struct {
	165	/* Includes trailing '\0'. */
	166	uint32_t provider_name_len;
	167	uint32_t ctx_name_len;
	168	} app_ctx;
	169	char padding[LTTNG_UST_CONTEXT_PADDING2];
	170	} u;
	171	} LTTNG_PACKED;
	172
	173	/*
	174	* Tracer channel attributes.
	175	*/
	176	#define LTTNG_UST_CHANNEL_ATTR_PADDING (LTTNG_UST_SYM_NAME_LEN + 32)
	177	struct lttng_ust_channel_attr {
	178	uint64_t subbuf_size; /* bytes, power of 2 */
	179	uint64_t num_subbuf; /* power of 2 */
	180	int overwrite; /* 1: overwrite, 0: discard */
	181	unsigned int switch_timer_interval; /* usec */
	182	unsigned int read_timer_interval; /* usec */
	183	enum lttng_ust_output output; /* splice, mmap */
	184	char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
	185	} LTTNG_PACKED;
	186
	187	#define LTTNG_UST_TRACEPOINT_ITER_PADDING 16
	188	struct lttng_ust_tracepoint_iter {
	189	char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */
	190	int loglevel;
	191	char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
	192	} LTTNG_PACKED;
	193
	194	enum lttng_ust_object_type {
	195	LTTNG_UST_OBJECT_TYPE_UNKNOWN = -1,
	196	LTTNG_UST_OBJECT_TYPE_CHANNEL = 0,
	197	LTTNG_UST_OBJECT_TYPE_STREAM = 1,
	198	LTTNG_UST_OBJECT_TYPE_EVENT = 2,
	199	LTTNG_UST_OBJECT_TYPE_CONTEXT = 3,
	200	};
	201
	202	#define LTTNG_UST_OBJECT_DATA_PADDING1 32
	203	#define LTTNG_UST_OBJECT_DATA_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	204
	205	struct lttng_ust_object_data {
	206	enum lttng_ust_object_type type;
	207	int handle;
	208	uint64_t size;
	209	char padding1[LTTNG_UST_OBJECT_DATA_PADDING1];
	210	union {
	211	struct {
	212	void *data;
	213	enum lttng_ust_chan_type type;
	214	int wakeup_fd;
	215	} channel;
	216	struct {
	217	int shm_fd;
	218	int wakeup_fd;
	219	uint32_t stream_nr;
	220	} stream;
	221	char padding2[LTTNG_UST_OBJECT_DATA_PADDING2];
	222	} u;
	223	} LTTNG_PACKED;
	224
	225	#define FILTER_BYTECODE_MAX_LEN 65536
	226	#define LTTNG_UST_FILTER_PADDING 32
	227	struct lttng_ust_filter_bytecode {
	228	uint32_t len;
	229	uint32_t reloc_offset;
	230	uint64_t seqnum;
	231	char padding[LTTNG_UST_FILTER_PADDING];
	232	char data[0];
	233	} LTTNG_PACKED;
	234
	235	#define LTTNG_UST_EXCLUSION_PADDING 32
	236	struct lttng_ust_event_exclusion {
	237	uint32_t count;
	238	char padding[LTTNG_UST_EXCLUSION_PADDING];
	239	char names[LTTNG_UST_SYM_NAME_LEN][0];
	240	} LTTNG_PACKED;
	241
	242	#define _UST_CMD(minor) (minor)
	243	#define _UST_CMDR(minor, type) (minor)
	244	#define _UST_CMDW(minor, type) (minor)
	245
	246	/* Handled by object descriptor */
	247	#define LTTNG_UST_RELEASE _UST_CMD(0x1)
	248
	249	/* Handled by object cmd */
	250
	251	/* LTTng-UST commands */
	252	#define LTTNG_UST_SESSION _UST_CMD(0x40)
	253	#define LTTNG_UST_TRACER_VERSION \
	254	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
	255	#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
	256	#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
	257	#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
	258	#define LTTNG_UST_TRACEPOINT_FIELD_LIST _UST_CMD(0x45)
	259
	260	/* Session FD commands */
	261	#define LTTNG_UST_CHANNEL \
	262	_UST_CMDW(0x51, struct lttng_ust_channel)
	263	#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
	264	#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
	265	#define LTTNG_UST_SESSION_STATEDUMP _UST_CMD(0x54)
	266
	267	/* Channel FD commands */
	268	#define LTTNG_UST_STREAM _UST_CMD(0x60)
	269	#define LTTNG_UST_EVENT \
	270	_UST_CMDW(0x61, struct lttng_ust_event)
	271
	272	/* Event and Channel FD commands */
	273	#define LTTNG_UST_CONTEXT \
	274	_UST_CMDW(0x70, struct lttng_ust_context)
	275	#define LTTNG_UST_FLUSH_BUFFER \
	276	_UST_CMD(0x71)
	277
	278	/* Event, Channel and Session commands */
	279	#define LTTNG_UST_ENABLE _UST_CMD(0x80)
	280	#define LTTNG_UST_DISABLE _UST_CMD(0x81)
	281
	282	/* Tracepoint list commands */
	283	#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
	284	#define LTTNG_UST_TRACEPOINT_FIELD_LIST_GET _UST_CMD(0x91)
	285
	286	/* Event FD commands */
	287	#define LTTNG_UST_FILTER _UST_CMD(0xA0)
	288
	289	#define LTTNG_UST_ROOT_HANDLE 0
	290
	291	struct lttng_ust_obj;
	292
	293	union ust_args {
	294	struct {
	295	void *chan_data;
	296	int wakeup_fd;
	297	} channel;
	298	struct {
	299	int shm_fd;
	300	int wakeup_fd;
	301	} stream;
	302	struct {
	303	struct lttng_ust_field_iter entry;
	304	} field_list;
	305	};
	306
	307	struct lttng_ust_objd_ops {
	308	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
	309	union ust_args args, void owner);
	310	int (*release)(int objd);
	311	};
	312
	313	/* Create root handle. Always ID 0. */
	314	int lttng_abi_create_root_handle(void);
	315
	316	const struct lttng_ust_objd_ops *objd_ops(int id);
	317	int lttng_ust_objd_unref(int id, int is_owner);
	318
	319	void lttng_ust_abi_exit(void);
	320	void lttng_ust_events_exit(void);
	321	void lttng_ust_objd_table_owner_cleanup(void *owner);
	322
	323	#endif /* _LTTNG_UST_ABI_H */