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

/*
 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
 * Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License only.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License along
 * with this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 */

#ifndef _LTTNG_UST_CTL_H
#define _LTTNG_UST_CTL_H

#include <sys/types.h>

#include "lttng-ust-abi.h"

#ifndef LTTNG_UST_UUID_LEN
#define LTTNG_UST_UUID_LEN	16
#endif

/* Default unix socket path */
#define LTTNG_UST_SOCK_FILENAME					\
	"lttng-ust-sock-"					\
	__ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION)

/*
 * Shared memory files path are automatically related to shm root, e.g.
 * /dev/shm under linux.
 */
#define LTTNG_UST_WAIT_FILENAME					\
	"lttng-ust-wait-"					\
	__ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION)

struct lttng_ust_shm_handle;
struct lttng_ust_lib_ring_buffer;

struct ustctl_consumer_channel_attr {
	enum lttng_ust_chan_type type;
	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 */
	uint32_t chan_id;           /* channel ID */
	unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */
} LTTNG_PACKED;

/*
 * API used by sessiond.
 */

struct lttng_ust_context_attr {
	enum lttng_ust_context_type ctx;
	union {
		struct lttng_ust_perf_counter_ctx perf_counter;
		struct {
		        char *provider_name;
			char *ctx_name;
		} app_ctx;
	} u;
};

/*
 * Error values: all the following functions return:
 * >= 0: Success (LTTNG_UST_OK)
 * < 0: error code.
 */
int ustctl_register_done(int sock);
int ustctl_create_session(int sock);
int ustctl_create_event(int sock, struct lttng_ust_event *ev,
		struct lttng_ust_object_data *channel_data,
		struct lttng_ust_object_data **event_data);
int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx,
		struct lttng_ust_object_data *obj_data,
		struct lttng_ust_object_data **context_data);
int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode,
		struct lttng_ust_object_data *obj_data);

int ustctl_enable(int sock, struct lttng_ust_object_data *object);
int ustctl_disable(int sock, struct lttng_ust_object_data *object);
int ustctl_start_session(int sock, int handle);
int ustctl_stop_session(int sock, int handle);

/*
 * ustctl_tracepoint_list returns a tracepoint list handle, or negative
 * error value.
 */
int ustctl_tracepoint_list(int sock);

/*
 * ustctl_tracepoint_list_get is used to iterate on the tp list
 * handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is
 * returned.
 */
int ustctl_tracepoint_list_get(int sock, int tp_list_handle,
		struct lttng_ust_tracepoint_iter *iter);

/*
 * ustctl_tracepoint_field_list returns a tracepoint field list handle,
 * or negative error value.
 */
int ustctl_tracepoint_field_list(int sock);

/*
 * ustctl_tracepoint_field_list_get is used to iterate on the tp field
 * list handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is
 * returned.
 */
int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle,
		struct lttng_ust_field_iter *iter);

int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v);
int ustctl_wait_quiescent(int sock);

int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object);

/* Release object created by members of this API. */
int ustctl_release_object(int sock, struct lttng_ust_object_data *data);
/* Release handle returned by create session. */
int ustctl_release_handle(int sock, int handle);

int ustctl_recv_channel_from_consumer(int sock,
		struct lttng_ust_object_data **channel_data);
int ustctl_recv_stream_from_consumer(int sock,
		struct lttng_ust_object_data **stream_data);
int ustctl_send_channel_to_ust(int sock, int session_handle,
		struct lttng_ust_object_data *channel_data);
int ustctl_send_stream_to_ust(int sock,
		struct lttng_ust_object_data *channel_data,
		struct lttng_ust_object_data *stream_data);

/*
 * ustctl_duplicate_ust_object_data allocated a new object in "dest" if
 * it succeeds (returns 0). It must be released using
 * ustctl_release_object() and then freed with free().
 */
int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest,
		struct lttng_ust_object_data *src);

/*
 * API used by consumer.
 */

struct ustctl_consumer_channel;
struct ustctl_consumer_stream;
struct ustctl_consumer_channel_attr;

struct ustctl_consumer_channel *
	ustctl_create_channel(struct ustctl_consumer_channel_attr *attr);
/*
 * Each stream created needs to be destroyed before calling
 * ustctl_destroy_channel().
 */
void ustctl_destroy_channel(struct ustctl_consumer_channel *chan);

int ustctl_send_channel_to_sessiond(int sock,
		struct ustctl_consumer_channel *channel);
int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan);
int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan);
int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *consumer_chan);
int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *consumer_chan);

int ustctl_write_metadata_to_channel(
		struct ustctl_consumer_channel *channel,
		const char *metadata_str,	/* NOT null-terminated */
		size_t len);			/* metadata length */

/*
 * Send a NULL stream to finish iteration over all streams of a given
 * channel.
 */
int ustctl_send_stream_to_sessiond(int sock,
		struct ustctl_consumer_stream *stream);
int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream);
int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream);
int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream);
int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream);

/* Create/destroy stream buffers for read */
struct ustctl_consumer_stream *
	ustctl_create_stream(struct ustctl_consumer_channel *channel,
			int cpu);
void ustctl_destroy_stream(struct ustctl_consumer_stream *stream);

/* For mmap mode, readable without "get" operation */
int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream,
		unsigned long *len);
int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream,
		unsigned long *len);

/*
 * For mmap mode, operate on the current packet (between get/put or
 * get_next/put_next).
 */
void *ustctl_get_mmap_base(struct ustctl_consumer_stream *stream);
int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream,
		unsigned long *off);
int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream,
		unsigned long *len);
int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream,
		unsigned long *len);
int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream);
int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream);

/* snapshot */

int ustctl_snapshot(struct ustctl_consumer_stream *stream);
int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream,
		unsigned long *pos);
int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream,
		unsigned long *pos);
int ustctl_get_subbuf(struct ustctl_consumer_stream *stream,
		unsigned long *pos);
int ustctl_put_subbuf(struct ustctl_consumer_stream *stream);

void ustctl_flush_buffer(struct ustctl_consumer_stream *stream,
		int producer_active);

/* event registry management */

enum ustctl_socket_type {
	USTCTL_SOCKET_CMD = 0,
	USTCTL_SOCKET_NOTIFY = 1,
};

enum ustctl_notify_cmd {
	USTCTL_NOTIFY_CMD_EVENT = 0,
	USTCTL_NOTIFY_CMD_CHANNEL = 1,
	USTCTL_NOTIFY_CMD_ENUM = 2,
};

enum ustctl_channel_header {
	USTCTL_CHANNEL_HEADER_UNKNOWN = 0,
	USTCTL_CHANNEL_HEADER_COMPACT = 1,
	USTCTL_CHANNEL_HEADER_LARGE = 2,
};

/* event type structures */

enum ustctl_abstract_types {
	ustctl_atype_integer,
	ustctl_atype_enum,
	ustctl_atype_array,
	ustctl_atype_sequence,
	ustctl_atype_string,
	ustctl_atype_float,
	NR_USTCTL_ABSTRACT_TYPES,
};

enum ustctl_string_encodings {
	ustctl_encode_none = 0,
	ustctl_encode_UTF8 = 1,
	ustctl_encode_ASCII = 2,
	NR_USTCTL_STRING_ENCODINGS,
};

#define USTCTL_UST_INTEGER_TYPE_PADDING	24
struct ustctl_integer_type {
	uint32_t size;		/* in bits */
	uint32_t signedness;
	uint32_t reverse_byte_order;
	uint32_t base;		/* 2, 8, 10, 16, for pretty print */
	int32_t encoding;
	uint16_t alignment;	/* in bits */
	char padding[USTCTL_UST_INTEGER_TYPE_PADDING];
} LTTNG_PACKED;

#define USTCTL_UST_FLOAT_TYPE_PADDING	24
struct ustctl_float_type {
	uint32_t exp_dig;		/* exponent digits, in bits */
	uint32_t mant_dig;		/* mantissa digits, in bits */
	uint32_t reverse_byte_order;
	uint16_t alignment;	/* in bits */
	char padding[USTCTL_UST_FLOAT_TYPE_PADDING];
} LTTNG_PACKED;

#define USTCTL_UST_ENUM_VALUE_PADDING	15
struct ustctl_enum_value {
	uint64_t value;
	uint8_t signedness;
	char padding[USTCTL_UST_ENUM_VALUE_PADDING];
} LTTNG_PACKED;

enum ustctl_ust_enum_entry_options {
	USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO = 1U << 0,
};

#define USTCTL_UST_ENUM_ENTRY_PADDING	32
struct ustctl_enum_entry {
	struct ustctl_enum_value start, end; /* start and end are inclusive */
	char string[LTTNG_UST_SYM_NAME_LEN];
	union {
		struct {
			uint32_t options;
		} LTTNG_PACKED extra;
		char padding[USTCTL_UST_ENUM_ENTRY_PADDING];
	} u;
} LTTNG_PACKED;

#define USTCTL_UST_BASIC_TYPE_PADDING	296
union _ustctl_basic_type {
	struct ustctl_integer_type integer;
	struct {
		int32_t encoding;
	} string;
	struct ustctl_float_type _float;
	struct {
		char name[LTTNG_UST_SYM_NAME_LEN];
	} enumeration;
	char padding[USTCTL_UST_BASIC_TYPE_PADDING];
} LTTNG_PACKED;

struct ustctl_basic_type {
	enum ustctl_abstract_types atype;
	union {
		union _ustctl_basic_type basic;
	} u;
} LTTNG_PACKED;

#define USTCTL_UST_TYPE_PADDING	128
struct ustctl_type {
	enum ustctl_abstract_types atype;
	union {
		union _ustctl_basic_type basic;
		struct {
			struct ustctl_basic_type elem_type;
			uint32_t length;		/* num. elems. */
		} array;
		struct {
			struct ustctl_basic_type length_type;
			struct ustctl_basic_type elem_type;
		} sequence;
		char padding[USTCTL_UST_TYPE_PADDING];
	} u;
} LTTNG_PACKED;

#define USTCTL_UST_FIELD_PADDING	28
struct ustctl_field {
	char name[LTTNG_UST_SYM_NAME_LEN];
	struct ustctl_type type;
	char padding[USTCTL_UST_FIELD_PADDING];
} LTTNG_PACKED;

/*
 * Returns 0 on success, negative error value on error.
 * If an error other than -LTTNG_UST_ERR_UNSUP_MAJOR is returned,
 * the output fields are not populated.
 */
int ustctl_recv_reg_msg(int sock,
	enum ustctl_socket_type *type,
	uint32_t *major,
	uint32_t *minor,
	uint32_t *pid,
	uint32_t *ppid,
	uint32_t *uid,
	uint32_t *gid,
	uint32_t *bits_per_long,
	uint32_t *uint8_t_alignment,
	uint32_t *uint16_t_alignment,
	uint32_t *uint32_t_alignment,
	uint32_t *uint64_t_alignment,
	uint32_t *long_alignment,
	int *byte_order,
	char *name);	/* size LTTNG_UST_ABI_PROCNAME_LEN */

/*
 * Returns 0 on success, negative UST or system error value on error.
 * Receive the notification command. The "notify_cmd" can then be used
 * by the caller to find out which ustctl_recv_* function should be
 * called to receive the notification, and which ustctl_reply_* is
 * appropriate.
 */
int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd);

/*
 * Returns 0 on success, negative UST or system error value on error.
 */
int ustctl_recv_register_event(int sock,
	int *session_objd,		/* session descriptor (output) */
	int *channel_objd,		/* channel descriptor (output) */
	char *event_name,		/*
					 * event name (output,
					 * size LTTNG_UST_SYM_NAME_LEN)
					 */
	int *loglevel_value,
	char **signature,		/*
					 * event signature
					 * (output, dynamically
					 * allocated, must be free(3)'d
					 * by the caller if function
					 * returns success.)
					 */
	size_t *nr_fields,
	struct ustctl_field **fields,
	char **model_emf_uri);

/*
 * Returns 0 on success, negative error value on error.
 */
int ustctl_reply_register_event(int sock,
	uint32_t id,			/* event id (input) */
	int ret_code);			/* return code. 0 ok, negative error */

/*
 * Returns 0 on success, negative UST or system error value on error.
 */
int ustctl_recv_register_enum(int sock,
	int *session_objd,
	char *enum_name,
	struct ustctl_enum_entry **entries,
	unsigned int *nr_entries);

/*
 * Returns 0 on success, negative error value on error.
 */
int ustctl_reply_register_enum(int sock,
	int64_t id,			/* enum id (input) */
	int ret_code);

/*
 * Returns 0 on success, negative UST or system error value on error.
 */
int ustctl_recv_register_channel(int sock,
	int *session_objd,		/* session descriptor (output) */
	int *channel_objd,		/* channel descriptor (output) */
	size_t *nr_fields,		/* context fields */
	struct ustctl_field **fields);

/*
 * Returns 0 on success, negative error value on error.
 */
int ustctl_reply_register_channel(int sock,
	uint32_t chan_id,
	enum ustctl_channel_header header_type,
	int ret_code);			/* return code. 0 ok, negative error */

#endif /* _LTTNG_UST_CTL_H */
Commit	Line	Data
2bdd86d4 MD	1	/*
2bdd86d4 MD	2	* Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
ffe60014	3	* Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
2bdd86d4	4	*
d14d33bf	5	* This program is free software; you can redistribute it and/or modify
ffe60014 DG	6	* it under the terms of the GNU General Public License as published by
ffe60014 DG	7	* the Free Software Foundation; version 2 of the License only.
2bdd86d4 MD	8	*
	9	* This program is distributed in the hope that it will be useful,
	10	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	11	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	12	* GNU General Public License for more details.
	13	*
d14d33bf AM	14	* You should have received a copy of the GNU General Public License along
	15	* with this program; if not, write to the Free Software Foundation, Inc.,
	16	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
2bdd86d4 MD	17	*/
	18
	19	#ifndef _LTTNG_UST_CTL_H
	20	#define _LTTNG_UST_CTL_H
	21
7972aab2	22	#include <sys/types.h>
ffe60014	23
534b3ed8 DG	24	#include "lttng-ust-abi.h"
534b3ed8 DG	25
ffe60014 DG	26	#ifndef LTTNG_UST_UUID_LEN
	27	#define LTTNG_UST_UUID_LEN 16
	28	#endif
	29
7972aab2 DG	30	/* Default unix socket path */
	31	#define LTTNG_UST_SOCK_FILENAME \
	32	"lttng-ust-sock-" \
	33	__ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION)
	34
	35	/*
	36	* Shared memory files path are automatically related to shm root, e.g.
	37	* /dev/shm under linux.
	38	*/
	39	#define LTTNG_UST_WAIT_FILENAME \
	40	"lttng-ust-wait-" \
	41	__ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION)
	42
ffe60014 DG	43	struct lttng_ust_shm_handle;
	44	struct lttng_ust_lib_ring_buffer;
	45
	46	struct ustctl_consumer_channel_attr {
	47	enum lttng_ust_chan_type type;
7daee932	48	uint64_t subbuf_size; /* bytes, power of 2 */
ffe60014 DG	49	uint64_t num_subbuf; /* power of 2 */
	50	int overwrite; /* 1: overwrite, 0: discard */
	51	unsigned int switch_timer_interval; /* usec */
	52	unsigned int read_timer_interval; /* usec */
	53	enum lttng_ust_output output; /* splice, mmap */
7972aab2	54	uint32_t chan_id; /* channel ID */
ffe60014 DG	55	unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */
	56	} LTTNG_PACKED;
	57
	58	/*
	59	* API used by sessiond.
	60	*/
	61
bdf64013 JG	62	struct lttng_ust_context_attr {
	63	enum lttng_ust_context_type ctx;
	64	union {
	65	struct lttng_ust_perf_counter_ctx perf_counter;
	66	struct {
	67	char *provider_name;
	68	char *ctx_name;
	69	} app_ctx;
	70	} u;
	71	};
	72
ffe60014 DG	73	/*
	74	* Error values: all the following functions return:
	75	* >= 0: Success (LTTNG_UST_OK)
	76	* < 0: error code.
	77	*/
13161846 DG	78	int ustctl_register_done(int sock);
13161846 DG	79	int ustctl_create_session(int sock);
2bdd86d4	80	int ustctl_create_event(int sock, struct lttng_ust_event *ev,
13161846 DG	81	struct lttng_ust_object_data *channel_data,
13161846 DG	82	struct lttng_ust_object_data **event_data);
bdf64013	83	int ustctl_add_context(int sock, struct lttng_ust_context_attr *ctx,
13161846 DG	84	struct lttng_ust_object_data *obj_data,
13161846 DG	85	struct lttng_ust_object_data **context_data);
53a80697 MD	86	int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode,
53a80697 MD	87	struct lttng_ust_object_data *obj_data);
2bdd86d4	88
13161846 DG	89	int ustctl_enable(int sock, struct lttng_ust_object_data *object);
	90	int ustctl_disable(int sock, struct lttng_ust_object_data *object);
	91	int ustctl_start_session(int sock, int handle);
	92	int ustctl_stop_session(int sock, int handle);
2bdd86d4	93
8ec2d32a MD	94	/*
	95	* ustctl_tracepoint_list returns a tracepoint list handle, or negative
	96	* error value.
	97	*/
	98	int ustctl_tracepoint_list(int sock);
ffe60014	99
8ec2d32a MD	100	/*
8ec2d32a MD	101	* ustctl_tracepoint_list_get is used to iterate on the tp list
ffe60014 DG	102	* handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is
ffe60014 DG	103	* returned.
8ec2d32a MD	104	*/
8ec2d32a MD	105	int ustctl_tracepoint_list_get(int sock, int tp_list_handle,
177f8533	106	struct lttng_ust_tracepoint_iter *iter);
8ec2d32a	107
f37d259d MD	108	/*
	109	* ustctl_tracepoint_field_list returns a tracepoint field list handle,
	110	* or negative error value.
	111	*/
	112	int ustctl_tracepoint_field_list(int sock);
	113
	114	/*
	115	* ustctl_tracepoint_field_list_get is used to iterate on the tp field
ffe60014 DG	116	* list handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is
ffe60014 DG	117	* returned.
f37d259d MD	118	*/
	119	int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle,
	120	struct lttng_ust_field_iter *iter);
	121
13161846 DG	122	int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v);
13161846 DG	123	int ustctl_wait_quiescent(int sock);
2bdd86d4	124
6d3686da DG	125	int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object);
6d3686da DG	126
ffe60014 DG	127	/* Release object created by members of this API. */
	128	int ustctl_release_object(int sock, struct lttng_ust_object_data *data);
	129	/* Release handle returned by create session. */
	130	int ustctl_release_handle(int sock, int handle);
	131
	132	int ustctl_recv_channel_from_consumer(int sock,
	133	struct lttng_ust_object_data **channel_data);
	134	int ustctl_recv_stream_from_consumer(int sock,
	135	struct lttng_ust_object_data **stream_data);
	136	int ustctl_send_channel_to_ust(int sock, int session_handle,
	137	struct lttng_ust_object_data *channel_data);
	138	int ustctl_send_stream_to_ust(int sock,
	139	struct lttng_ust_object_data *channel_data,
	140	struct lttng_ust_object_data *stream_data);
	141
7972aab2 DG	142	/*
	143	* ustctl_duplicate_ust_object_data allocated a new object in "dest" if
	144	* it succeeds (returns 0). It must be released using
	145	* ustctl_release_object() and then freed with free().
	146	*/
	147	int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest,
	148	struct lttng_ust_object_data *src);
	149
2bdd86d4	150	/*
ffe60014	151	* API used by consumer.
2bdd86d4	152	*/
ffe60014 DG	153
	154	struct ustctl_consumer_channel;
	155	struct ustctl_consumer_stream;
	156	struct ustctl_consumer_channel_attr;
	157
	158	struct ustctl_consumer_channel *
	159	ustctl_create_channel(struct ustctl_consumer_channel_attr *attr);
2bdd86d4	160	/*
ffe60014 DG	161	* Each stream created needs to be destroyed before calling
ffe60014 DG	162	* ustctl_destroy_channel().
2bdd86d4	163	*/
ffe60014	164	void ustctl_destroy_channel(struct ustctl_consumer_channel *chan);
2bdd86d4	165
ffe60014 DG	166	int ustctl_send_channel_to_sessiond(int sock,
ffe60014 DG	167	struct ustctl_consumer_channel *channel);
749d339a MD	168	int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan);
	169	int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan);
	170	int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *consumer_chan);
	171	int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *consumer_chan);
	172
7972aab2 DG	173	int ustctl_write_metadata_to_channel(
	174	struct ustctl_consumer_channel *channel,
	175	const char metadata_str, / NOT null-terminated */
	176	size_t len); /* metadata length */
	177
ffe60014 DG	178	/*
	179	* Send a NULL stream to finish iteration over all streams of a given
	180	* channel.
	181	*/
	182	int ustctl_send_stream_to_sessiond(int sock,
	183	struct ustctl_consumer_stream *stream);
749d339a	184	int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream);
ffe60014	185	int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream);
749d339a MD	186	int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream);
749d339a MD	187	int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream);
2bdd86d4	188
ffe60014 DG	189	/* Create/destroy stream buffers for read */
	190	struct ustctl_consumer_stream *
	191	ustctl_create_stream(struct ustctl_consumer_channel *channel,
	192	int cpu);
	193	void ustctl_destroy_stream(struct ustctl_consumer_stream *stream);
2bdd86d4	194
2bdd86d4	195	/* For mmap mode, readable without "get" operation */
ffe60014	196	int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream,
13161846	197	unsigned long *len);
ffe60014	198	int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream,
13161846	199	unsigned long *len);
2bdd86d4 MD	200
	201	/*
	202	* For mmap mode, operate on the current packet (between get/put or
	203	* get_next/put_next).
	204	*/
ffe60014 DG	205	void ustctl_get_mmap_base(struct ustctl_consumer_stream stream);
	206	int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream,
	207	unsigned long *off);
	208	int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream,
	209	unsigned long *len);
	210	int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream,
	211	unsigned long *len);
	212	int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream);
	213	int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream);
2bdd86d4 MD	214
	215	/* snapshot */
	216
ffe60014 DG	217	int ustctl_snapshot(struct ustctl_consumer_stream *stream);
	218	int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream,
	219	unsigned long *pos);
	220	int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream,
	221	unsigned long *pos);
	222	int ustctl_get_subbuf(struct ustctl_consumer_stream *stream,
	223	unsigned long *pos);
	224	int ustctl_put_subbuf(struct ustctl_consumer_stream *stream);
8ec2d32a	225
ffe60014 DG	226	void ustctl_flush_buffer(struct ustctl_consumer_stream *stream,
ffe60014 DG	227	int producer_active);
2bdd86d4	228
7972aab2 DG	229	/* event registry management */
	230
	231	enum ustctl_socket_type {
	232	USTCTL_SOCKET_CMD = 0,
	233	USTCTL_SOCKET_NOTIFY = 1,
	234	};
	235
	236	enum ustctl_notify_cmd {
	237	USTCTL_NOTIFY_CMD_EVENT = 0,
	238	USTCTL_NOTIFY_CMD_CHANNEL = 1,
10b56aef	239	USTCTL_NOTIFY_CMD_ENUM = 2,
7972aab2 DG	240	};
	241
	242	enum ustctl_channel_header {
	243	USTCTL_CHANNEL_HEADER_UNKNOWN = 0,
	244	USTCTL_CHANNEL_HEADER_COMPACT = 1,
	245	USTCTL_CHANNEL_HEADER_LARGE = 2,
	246	};
	247
	248	/* event type structures */
	249
	250	enum ustctl_abstract_types {
	251	ustctl_atype_integer,
	252	ustctl_atype_enum,
	253	ustctl_atype_array,
	254	ustctl_atype_sequence,
	255	ustctl_atype_string,
	256	ustctl_atype_float,
	257	NR_USTCTL_ABSTRACT_TYPES,
	258	};
	259
	260	enum ustctl_string_encodings {
	261	ustctl_encode_none = 0,
	262	ustctl_encode_UTF8 = 1,
	263	ustctl_encode_ASCII = 2,
	264	NR_USTCTL_STRING_ENCODINGS,
	265	};
	266
	267	#define USTCTL_UST_INTEGER_TYPE_PADDING 24
	268	struct ustctl_integer_type {
	269	uint32_t size; /* in bits */
	270	uint32_t signedness;
	271	uint32_t reverse_byte_order;
	272	uint32_t base; /* 2, 8, 10, 16, for pretty print */
82e5fba0	273	int32_t encoding;
7972aab2 DG	274	uint16_t alignment; /* in bits */
	275	char padding[USTCTL_UST_INTEGER_TYPE_PADDING];
	276	} LTTNG_PACKED;
	277
	278	#define USTCTL_UST_FLOAT_TYPE_PADDING 24
	279	struct ustctl_float_type {
	280	uint32_t exp_dig; /* exponent digits, in bits */
	281	uint32_t mant_dig; /* mantissa digits, in bits */
	282	uint32_t reverse_byte_order;
	283	uint16_t alignment; /* in bits */
	284	char padding[USTCTL_UST_FLOAT_TYPE_PADDING];
	285	} LTTNG_PACKED;
	286
3b016e58 MD	287	#define USTCTL_UST_ENUM_VALUE_PADDING 15
	288	struct ustctl_enum_value {
	289	uint64_t value;
	290	uint8_t signedness;
	291	char padding[USTCTL_UST_ENUM_VALUE_PADDING];
	292	} LTTNG_PACKED;
	293
9d27cec7 PP	294	enum ustctl_ust_enum_entry_options {
	295	USTCTL_UST_ENUM_ENTRY_OPTION_IS_AUTO = 1U << 0,
	296	};
	297
10b56aef MD	298	#define USTCTL_UST_ENUM_ENTRY_PADDING 32
10b56aef MD	299	struct ustctl_enum_entry {
3b016e58	300	struct ustctl_enum_value start, end; /* start and end are inclusive */
10b56aef	301	char string[LTTNG_UST_SYM_NAME_LEN];
e85e3723 PP	302	union {
e85e3723 PP	303	struct {
9d27cec7 PP	304	uint32_t options;
9d27cec7 PP	305	} LTTNG_PACKED extra;
e85e3723 PP	306	char padding[USTCTL_UST_ENUM_ENTRY_PADDING];
e85e3723 PP	307	} u;
3b016e58	308	} LTTNG_PACKED;
10b56aef	309
7972aab2 DG	310	#define USTCTL_UST_BASIC_TYPE_PADDING 296
	311	union _ustctl_basic_type {
	312	struct ustctl_integer_type integer;
	313	struct {
82e5fba0	314	int32_t encoding;
7972aab2 DG	315	} string;
7972aab2 DG	316	struct ustctl_float_type _float;
10b56aef MD	317	struct {
	318	char name[LTTNG_UST_SYM_NAME_LEN];
	319	} enumeration;
7972aab2 DG	320	char padding[USTCTL_UST_BASIC_TYPE_PADDING];
	321	} LTTNG_PACKED;
	322
	323	struct ustctl_basic_type {
	324	enum ustctl_abstract_types atype;
	325	union {
	326	union _ustctl_basic_type basic;
	327	} u;
	328	} LTTNG_PACKED;
	329
	330	#define USTCTL_UST_TYPE_PADDING 128
	331	struct ustctl_type {
	332	enum ustctl_abstract_types atype;
	333	union {
	334	union _ustctl_basic_type basic;
	335	struct {
	336	struct ustctl_basic_type elem_type;
	337	uint32_t length; /* num. elems. */
	338	} array;
	339	struct {
	340	struct ustctl_basic_type length_type;
	341	struct ustctl_basic_type elem_type;
	342	} sequence;
	343	char padding[USTCTL_UST_TYPE_PADDING];
	344	} u;
	345	} LTTNG_PACKED;
	346
	347	#define USTCTL_UST_FIELD_PADDING 28
	348	struct ustctl_field {
	349	char name[LTTNG_UST_SYM_NAME_LEN];
	350	struct ustctl_type type;
	351	char padding[USTCTL_UST_FIELD_PADDING];
	352	} LTTNG_PACKED;
	353
	354	/*
	355	* Returns 0 on success, negative error value on error.
	356	* If an error other than -LTTNG_UST_ERR_UNSUP_MAJOR is returned,
	357	* the output fields are not populated.
	358	*/
	359	int ustctl_recv_reg_msg(int sock,
	360	enum ustctl_socket_type *type,
	361	uint32_t *major,
	362	uint32_t *minor,
	363	uint32_t *pid,
	364	uint32_t *ppid,
	365	uint32_t *uid,
	366	uint32_t *gid,
	367	uint32_t *bits_per_long,
	368	uint32_t *uint8_t_alignment,
	369	uint32_t *uint16_t_alignment,
	370	uint32_t *uint32_t_alignment,
	371	uint32_t *uint64_t_alignment,
	372	uint32_t *long_alignment,
	373	int *byte_order,
	374	char name); / size LTTNG_UST_ABI_PROCNAME_LEN */
	375
	376	/*
	377	* Returns 0 on success, negative UST or system error value on error.
	378	* Receive the notification command. The "notify_cmd" can then be used
	379	* by the caller to find out which ustctl_recv_* function should be
	380	* called to receive the notification, and which ustctl_reply_* is
	381	* appropriate.
	382	*/
	383	int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd);
384
385	/*
386	* Returns 0 on success, negative UST or system error value on error.
387	*/
388	int ustctl_recv_register_event(int sock,
389	int session_objd, / session descriptor (output) */
390	int channel_objd, / channel descriptor (output) */
391	char event_name, /
392	* event name (output,
393	* size LTTNG_UST_SYM_NAME_LEN)
394	*/
2106efa0	395	int *loglevel_value,
7972aab2 DG	396	char *signature, /
	397	* event signature
	398	* (output, dynamically
	399	* allocated, must be free(3)'d
	400	* by the caller if function
	401	* returns success.)
	402	*/
	403	size_t *nr_fields,
	404	struct ustctl_field **fields,
	405	char **model_emf_uri);
	406
	407	/*
	408	* Returns 0 on success, negative error value on error.
	409	*/
	410	int ustctl_reply_register_event(int sock,
	411	uint32_t id, /* event id (input) */
	412	int ret_code); /* return code. 0 ok, negative error */
	413
10b56aef MD	414	/*
	415	* Returns 0 on success, negative UST or system error value on error.
	416	*/
	417	int ustctl_recv_register_enum(int sock,
	418	int *session_objd,
	419	char *enum_name,
	420	struct ustctl_enum_entry **entries,
	421	unsigned int *nr_entries);
	422
	423	/*
	424	* Returns 0 on success, negative error value on error.
	425	*/
	426	int ustctl_reply_register_enum(int sock,
	427	int64_t id, /* enum id (input) */
	428	int ret_code);
	429
7972aab2 DG	430	/*
	431	* Returns 0 on success, negative UST or system error value on error.
	432	*/
	433	int ustctl_recv_register_channel(int sock,
	434	int session_objd, / session descriptor (output) */
	435	int channel_objd, / channel descriptor (output) */
	436	size_t nr_fields, / context fields */
	437	struct ustctl_field **fields);
	438
	439	/*
	440	* Returns 0 on success, negative error value on error.
	441	*/
	442	int ustctl_reply_register_channel(int sock,
	443	uint32_t chan_id,
	444	enum ustctl_channel_header header_type,
	445	int ret_code); /* return code. 0 ok, negative error */
	446
2bdd86d4	447	#endif /* _LTTNG_UST_CTL_H */