[lttng-ust.git] / include / 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>

#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		6
#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_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,
};

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;
		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,
	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 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)

/* 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_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	#include <lttng/ust-compiler.h>
	32
	33	#ifndef __ust_stringify
	34	#define __ust_stringify1(x) #x
	35	#define __ust_stringify(x) __ust_stringify1(x)
	36	#endif /* __ust_stringify */
	37
	38	#define LTTNG_UST_SYM_NAME_LEN 256
	39	#define LTTNG_UST_ABI_PROCNAME_LEN 16
	40
	41	/* UST comm magic number, used to validate protocol and endianness. */
	42	#define LTTNG_UST_COMM_MAGIC 0xC57C57C5
	43
	44	/* Version for ABI between liblttng-ust, sessiond, consumerd */
	45	#define LTTNG_UST_ABI_MAJOR_VERSION 6
	46	#define LTTNG_UST_ABI_MINOR_VERSION 1
	47
	48	enum lttng_ust_instrumentation {
	49	LTTNG_UST_TRACEPOINT = 0,
	50	LTTNG_UST_PROBE = 1,
	51	LTTNG_UST_FUNCTION = 2,
	52	};
	53
	54	enum lttng_ust_loglevel_type {
	55	LTTNG_UST_LOGLEVEL_ALL = 0,
	56	LTTNG_UST_LOGLEVEL_RANGE = 1,
	57	LTTNG_UST_LOGLEVEL_SINGLE = 2,
	58	};
	59
	60	enum lttng_ust_output {
	61	LTTNG_UST_MMAP = 0,
	62	};
	63
	64	enum lttng_ust_chan_type {
	65	LTTNG_UST_CHAN_PER_CPU = 0,
	66	LTTNG_UST_CHAN_METADATA = 1,
	67	};
	68
	69	struct lttng_ust_tracer_version {
	70	uint32_t major;
	71	uint32_t minor;
	72	uint32_t patchlevel;
	73	} LTTNG_PACKED;
	74
	75	#define LTTNG_UST_CHANNEL_PADDING (LTTNG_UST_SYM_NAME_LEN + 32)
	76	/*
	77	* Given that the consumerd is limited to 64k file descriptors, we
	78	* cannot expect much more than 1MB channel structure size. This size is
	79	* depends on the number of streams within a channel, which depends on
	80	* the number of possible CPUs on the system.
	81	*/
	82	#define LTTNG_UST_CHANNEL_DATA_MAX_LEN 1048576U
	83	struct lttng_ust_channel {
	84	uint64_t len;
	85	enum lttng_ust_chan_type type;
	86	char padding[LTTNG_UST_CHANNEL_PADDING];
	87	char data[]; /* variable sized data */
	88	} LTTNG_PACKED;
	89
	90	#define LTTNG_UST_STREAM_PADDING1 (LTTNG_UST_SYM_NAME_LEN + 32)
	91	struct lttng_ust_stream {
	92	uint64_t len; /* shm len */
	93	uint32_t stream_nr; /* stream number */
	94	char padding[LTTNG_UST_STREAM_PADDING1];
	95	/*
	96	* shm_fd and wakeup_fd are send over unix socket as file
	97	* descriptors after this structure.
	98	*/
	99	} LTTNG_PACKED;
	100
	101	#define LTTNG_UST_EVENT_PADDING1 16
	102	#define LTTNG_UST_EVENT_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	103	struct lttng_ust_event {
	104	enum lttng_ust_instrumentation instrumentation;
	105	char name[LTTNG_UST_SYM_NAME_LEN]; /* event name */
	106
	107	enum lttng_ust_loglevel_type loglevel_type;
	108	int loglevel; /* value, -1: all */
	109	char padding[LTTNG_UST_EVENT_PADDING1];
	110
	111	/* Per instrumentation type configuration */
	112	union {
	113	char padding[LTTNG_UST_EVENT_PADDING2];
	114	} u;
	115	} LTTNG_PACKED;
	116
	117	enum lttng_ust_field_type {
	118	LTTNG_UST_FIELD_OTHER = 0,
	119	LTTNG_UST_FIELD_INTEGER = 1,
	120	LTTNG_UST_FIELD_ENUM = 2,
	121	LTTNG_UST_FIELD_FLOAT = 3,
	122	LTTNG_UST_FIELD_STRING = 4,
	123	};
	124
	125	#define LTTNG_UST_FIELD_ITER_PADDING (LTTNG_UST_SYM_NAME_LEN + 28)
	126	struct lttng_ust_field_iter {
	127	char event_name[LTTNG_UST_SYM_NAME_LEN];
	128	char field_name[LTTNG_UST_SYM_NAME_LEN];
	129	enum lttng_ust_field_type type;
	130	int loglevel; /* event loglevel */
	131	int nowrite;
	132	char padding[LTTNG_UST_FIELD_ITER_PADDING];
	133	} LTTNG_PACKED;
	134
	135	enum lttng_ust_context_type {
	136	LTTNG_UST_CONTEXT_VTID = 0,
	137	LTTNG_UST_CONTEXT_VPID = 1,
	138	LTTNG_UST_CONTEXT_PTHREAD_ID = 2,
	139	LTTNG_UST_CONTEXT_PROCNAME = 3,
	140	LTTNG_UST_CONTEXT_IP = 4,
	141	LTTNG_UST_CONTEXT_PERF_THREAD_COUNTER = 5,
	142	LTTNG_UST_CONTEXT_CPU_ID = 6,
	143	};
	144
	145	struct lttng_ust_perf_counter_ctx {
	146	uint32_t type;
	147	uint64_t config;
	148	char name[LTTNG_UST_SYM_NAME_LEN];
	149	} LTTNG_PACKED;
	150
	151	#define LTTNG_UST_CONTEXT_PADDING1 16
	152	#define LTTNG_UST_CONTEXT_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	153	struct lttng_ust_context {
	154	enum lttng_ust_context_type ctx;
	155	char padding[LTTNG_UST_CONTEXT_PADDING1];
	156
	157	union {
	158	struct lttng_ust_perf_counter_ctx perf_counter;
	159	char padding[LTTNG_UST_CONTEXT_PADDING2];
	160	} u;
	161	} LTTNG_PACKED;
	162
	163	/*
	164	* Tracer channel attributes.
	165	*/
	166	#define LTTNG_UST_CHANNEL_ATTR_PADDING (LTTNG_UST_SYM_NAME_LEN + 32)
	167	struct lttng_ust_channel_attr {
	168	uint64_t subbuf_size; /* bytes */
	169	uint64_t num_subbuf; /* power of 2 */
	170	int overwrite; /* 1: overwrite, 0: discard */
	171	unsigned int switch_timer_interval; /* usec */
	172	unsigned int read_timer_interval; /* usec */
	173	enum lttng_ust_output output; /* splice, mmap */
	174	char padding[LTTNG_UST_CHANNEL_ATTR_PADDING];
	175	} LTTNG_PACKED;
	176
	177	#define LTTNG_UST_TRACEPOINT_ITER_PADDING 16
	178	struct lttng_ust_tracepoint_iter {
	179	char name[LTTNG_UST_SYM_NAME_LEN]; /* provider:name */
	180	int loglevel;
	181	char padding[LTTNG_UST_TRACEPOINT_ITER_PADDING];
	182	} LTTNG_PACKED;
	183
	184	enum lttng_ust_object_type {
	185	LTTNG_UST_OBJECT_TYPE_UNKNOWN = -1,
	186	LTTNG_UST_OBJECT_TYPE_CHANNEL = 0,
	187	LTTNG_UST_OBJECT_TYPE_STREAM = 1,
	188	LTTNG_UST_OBJECT_TYPE_EVENT = 2,
	189	LTTNG_UST_OBJECT_TYPE_CONTEXT = 3,
	190	};
	191
	192	#define LTTNG_UST_OBJECT_DATA_PADDING1 32
	193	#define LTTNG_UST_OBJECT_DATA_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	194
	195	struct lttng_ust_object_data {
	196	enum lttng_ust_object_type type;
	197	int handle;
	198	uint64_t size;
	199	char padding1[LTTNG_UST_OBJECT_DATA_PADDING1];
	200	union {
	201	struct {
	202	void *data;
	203	enum lttng_ust_chan_type type;
	204	int wakeup_fd;
	205	} channel;
	206	struct {
	207	int shm_fd;
	208	int wakeup_fd;
	209	uint32_t stream_nr;
	210	} stream;
	211	char padding2[LTTNG_UST_OBJECT_DATA_PADDING2];
	212	} u;
	213	} LTTNG_PACKED;
	214
	215	enum lttng_ust_calibrate_type {
	216	LTTNG_UST_CALIBRATE_TRACEPOINT,
	217	};
	218
	219	#define LTTNG_UST_CALIBRATE_PADDING1 16
	220	#define LTTNG_UST_CALIBRATE_PADDING2 (LTTNG_UST_SYM_NAME_LEN + 32)
	221	struct lttng_ust_calibrate {
	222	enum lttng_ust_calibrate_type type; /* type (input) */
	223	char padding[LTTNG_UST_CALIBRATE_PADDING1];
	224
	225	union {
	226	char padding[LTTNG_UST_CALIBRATE_PADDING2];
	227	} u;
	228	} LTTNG_PACKED;
	229
	230	#define FILTER_BYTECODE_MAX_LEN 65536
	231	#define LTTNG_UST_FILTER_PADDING 32
	232	struct lttng_ust_filter_bytecode {
	233	uint32_t len;
	234	uint32_t reloc_offset;
	235	uint64_t seqnum;
	236	char padding[LTTNG_UST_FILTER_PADDING];
	237	char data[0];
	238	} LTTNG_PACKED;
	239
	240	#define LTTNG_UST_EXCLUSION_PADDING 32
	241	struct lttng_ust_event_exclusion {
	242	uint32_t count;
	243	char padding[LTTNG_UST_EXCLUSION_PADDING];
	244	char names[LTTNG_UST_SYM_NAME_LEN][0];
	245	} LTTNG_PACKED;
	246
	247	#define _UST_CMD(minor) (minor)
	248	#define _UST_CMDR(minor, type) (minor)
	249	#define _UST_CMDW(minor, type) (minor)
	250
	251	/* Handled by object descriptor */
	252	#define LTTNG_UST_RELEASE _UST_CMD(0x1)
	253
	254	/* Handled by object cmd */
	255
	256	/* LTTng-UST commands */
	257	#define LTTNG_UST_SESSION _UST_CMD(0x40)
	258	#define LTTNG_UST_TRACER_VERSION \
	259	_UST_CMDR(0x41, struct lttng_ust_tracer_version)
	260	#define LTTNG_UST_TRACEPOINT_LIST _UST_CMD(0x42)
	261	#define LTTNG_UST_WAIT_QUIESCENT _UST_CMD(0x43)
	262	#define LTTNG_UST_REGISTER_DONE _UST_CMD(0x44)
	263	#define LTTNG_UST_TRACEPOINT_FIELD_LIST _UST_CMD(0x45)
	264
	265	/* Session FD commands */
	266	#define LTTNG_UST_CHANNEL \
	267	_UST_CMDW(0x51, struct lttng_ust_channel)
	268	#define LTTNG_UST_SESSION_START _UST_CMD(0x52)
	269	#define LTTNG_UST_SESSION_STOP _UST_CMD(0x53)
	270
	271	/* Channel FD commands */
	272	#define LTTNG_UST_STREAM _UST_CMD(0x60)
	273	#define LTTNG_UST_EVENT \
	274	_UST_CMDW(0x61, struct lttng_ust_event)
	275
	276	/* Event and Channel FD commands */
	277	#define LTTNG_UST_CONTEXT \
	278	_UST_CMDW(0x70, struct lttng_ust_context)
	279	#define LTTNG_UST_FLUSH_BUFFER \
	280	_UST_CMD(0x71)
	281
	282	/* Event, Channel and Session commands */
	283	#define LTTNG_UST_ENABLE _UST_CMD(0x80)
	284	#define LTTNG_UST_DISABLE _UST_CMD(0x81)
	285
	286	/* Tracepoint list commands */
	287	#define LTTNG_UST_TRACEPOINT_LIST_GET _UST_CMD(0x90)
	288	#define LTTNG_UST_TRACEPOINT_FIELD_LIST_GET _UST_CMD(0x91)
	289
	290	/* Event FD commands */
	291	#define LTTNG_UST_FILTER _UST_CMD(0xA0)
	292	#define LTTNG_UST_EXCLUSION _UST_CMD(0xA1)
	293
	294	#define LTTNG_UST_ROOT_HANDLE 0
	295
	296	struct lttng_ust_obj;
	297
	298	union ust_args {
	299	struct {
	300	void *chan_data;
	301	int wakeup_fd;
	302	} channel;
	303	struct {
	304	int shm_fd;
	305	int wakeup_fd;
	306	} stream;
	307	struct {
	308	struct lttng_ust_field_iter entry;
	309	} field_list;
	310	};
	311
	312	struct lttng_ust_objd_ops {
	313	long (*cmd)(int objd, unsigned int cmd, unsigned long arg,
	314	union ust_args args, void owner);
	315	int (*release)(int objd);
	316	};
	317
	318	/* Create root handle. Always ID 0. */
	319	int lttng_abi_create_root_handle(void);
	320
	321	const struct lttng_ust_objd_ops *objd_ops(int id);
	322	int lttng_ust_objd_unref(int id, int is_owner);
	323
	324	void lttng_ust_abi_exit(void);
	325	void lttng_ust_events_exit(void);
	326	void lttng_ust_objd_table_owner_cleanup(void *owner);
	327
	328	#endif /* _LTTNG_UST_ABI_H */