[lttng-ust.git] / include / 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 <lttng/ust-abi.h>
#include <sys/types.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 */
	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.
 */

/*
 * 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 *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);

int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate);

/* 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 */
ssize_t ustctl_write_one_packet_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);

/* index */
int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream,
		uint64_t *timestamp_begin);
int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream,
	uint64_t *timestamp_end);
int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream,
	uint64_t *events_discarded);
int ustctl_get_content_size(struct ustctl_consumer_stream *stream,
	uint64_t *content_size);
int ustctl_get_packet_size(struct ustctl_consumer_stream *stream,
	uint64_t *packet_size);
int ustctl_get_stream_id(struct ustctl_consumer_stream *stream,
		uint64_t *stream_id);
int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream,
		uint64_t *ts);

/* 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,
};

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 */
	enum ustctl_string_encodings 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_BASIC_TYPE_PADDING	296
union _ustctl_basic_type {
	struct ustctl_integer_type integer;
	struct {
		enum ustctl_string_encodings encoding;
	} string;
	struct ustctl_float_type _float;
	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,
	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_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
f3105c67 MD	1	/*
f3105c67 MD	2	* Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
74d81a6c	3	* Copyright (C) 2011-2013 - Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
f3105c67	4	*
e92f3e28 MD	5	* This program is free software; you can redistribute it and/or modify
	6	* it under the terms of the GNU General Public License as published by
	7	* the Free Software Foundation; version 2 of the License only.
f3105c67 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	*
e92f3e28 MD	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.
f3105c67 MD	17	*/
	18
	19	#ifndef _LTTNG_UST_CTL_H
	20	#define _LTTNG_UST_CTL_H
	21
4318ae1b	22	#include <lttng/ust-abi.h>
32ce8569	23	#include <sys/types.h>
74d81a6c MD	24
	25	#ifndef LTTNG_UST_UUID_LEN
	26	#define LTTNG_UST_UUID_LEN 16
	27	#endif
	28
32ce8569 MD	29	/* Default unix socket path */
	30	#define LTTNG_UST_SOCK_FILENAME \
	31	"lttng-ust-sock-" \
	32	__ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION)
	33
	34	/*
	35	* Shared memory files path are automatically related to shm root, e.g.
	36	* /dev/shm under linux.
	37	*/
	38	#define LTTNG_UST_WAIT_FILENAME \
	39	"lttng-ust-wait-" \
	40	__ust_stringify(LTTNG_UST_ABI_MAJOR_VERSION)
	41
74d81a6c MD	42	struct lttng_ust_shm_handle;
	43	struct lttng_ust_lib_ring_buffer;
	44
	45	struct ustctl_consumer_channel_attr {
	46	enum lttng_ust_chan_type type;
	47	uint64_t subbuf_size; /* bytes */
	48	uint64_t num_subbuf; /* power of 2 */
	49	int overwrite; /* 1: overwrite, 0: discard */
	50	unsigned int switch_timer_interval; /* usec */
	51	unsigned int read_timer_interval; /* usec */
	52	enum lttng_ust_output output; /* splice, mmap */
6ca18e66	53	uint32_t chan_id; /* channel ID */
74d81a6c MD	54	unsigned char uuid[LTTNG_UST_UUID_LEN]; /* Trace session unique ID */
	55	} LTTNG_PACKED;
	56
	57	/*
	58	* API used by sessiond.
	59	*/
	60
7bc53e94 MD	61	/*
7bc53e94 MD	62	* Error values: all the following functions return:
c354a72c	63	* >= 0: Success (LTTNG_UST_OK)
7bc53e94 MD	64	* < 0: error code.
7bc53e94 MD	65	*/
1c5e467e	66	int ustctl_register_done(int sock);
f3105c67	67	int ustctl_create_session(int sock);
f3105c67	68	int ustctl_create_event(int sock, struct lttng_ust_event *ev,
61f02aea MD	69	struct lttng_ust_object_data *channel_data,
61f02aea MD	70	struct lttng_ust_object_data **event_data);
f3105c67	71	int ustctl_add_context(int sock, struct lttng_ust_context *ctx,
61f02aea MD	72	struct lttng_ust_object_data *obj_data,
61f02aea MD	73	struct lttng_ust_object_data **context_data);
cd54f6d9 MD	74	int ustctl_set_filter(int sock, struct lttng_ust_filter_bytecode *bytecode,
cd54f6d9 MD	75	struct lttng_ust_object_data *obj_data);
f3105c67	76
61f02aea MD	77	int ustctl_enable(int sock, struct lttng_ust_object_data *object);
61f02aea MD	78	int ustctl_disable(int sock, struct lttng_ust_object_data *object);
4a6ca058 MD	79	int ustctl_start_session(int sock, int handle);
4a6ca058 MD	80	int ustctl_stop_session(int sock, int handle);
f3105c67	81
b115631f MD	82	/*
	83	* ustctl_tracepoint_list returns a tracepoint list handle, or negative
	84	* error value.
	85	*/
	86	int ustctl_tracepoint_list(int sock);
74d81a6c	87
b115631f MD	88	/*
b115631f MD	89	* ustctl_tracepoint_list_get is used to iterate on the tp list
7bc53e94 MD	90	* handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is
7bc53e94 MD	91	* returned.
b115631f MD	92	*/
b115631f MD	93	int ustctl_tracepoint_list_get(int sock, int tp_list_handle,
cbef6901	94	struct lttng_ust_tracepoint_iter *iter);
b115631f	95
40003310 MD	96	/*
	97	* ustctl_tracepoint_field_list returns a tracepoint field list handle,
	98	* or negative error value.
	99	*/
	100	int ustctl_tracepoint_field_list(int sock);
	101
	102	/*
	103	* ustctl_tracepoint_field_list_get is used to iterate on the tp field
7bc53e94 MD	104	* list handle. End is iteration is reached when -LTTNG_UST_ERR_NOENT is
7bc53e94 MD	105	* returned.
40003310 MD	106	*/
	107	int ustctl_tracepoint_field_list_get(int sock, int tp_field_list_handle,
	108	struct lttng_ust_field_iter *iter);
	109
f3105c67 MD	110	int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v);
	111	int ustctl_wait_quiescent(int sock);
	112
f1fffc57 MD	113	int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object);
f1fffc57 MD	114
f3105c67 MD	115	int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate);
f3105c67 MD	116
74d81a6c MD	117	/* Release object created by members of this API. */
	118	int ustctl_release_object(int sock, struct lttng_ust_object_data *data);
	119	/* Release handle returned by create session. */
	120	int ustctl_release_handle(int sock, int handle);
	121
	122	int ustctl_recv_channel_from_consumer(int sock,
	123	struct lttng_ust_object_data **channel_data);
	124	int ustctl_recv_stream_from_consumer(int sock,
	125	struct lttng_ust_object_data **stream_data);
	126	int ustctl_send_channel_to_ust(int sock, int session_handle,
	127	struct lttng_ust_object_data *channel_data);
	128	int ustctl_send_stream_to_ust(int sock,
	129	struct lttng_ust_object_data *channel_data,
	130	struct lttng_ust_object_data *stream_data);
	131
12f3dabc MD	132	/*
	133	* ustctl_duplicate_ust_object_data allocated a new object in "dest" if
	134	* it succeeds (returns 0). It must be released using
	135	* ustctl_release_object() and then freed with free().
	136	*/
	137	int ustctl_duplicate_ust_object_data(struct lttng_ust_object_data **dest,
	138	struct lttng_ust_object_data *src);
	139
f3105c67	140	/*
74d81a6c	141	* API used by consumer.
f3105c67	142	*/
74d81a6c MD	143
	144	struct ustctl_consumer_channel;
	145	struct ustctl_consumer_stream;
	146	struct ustctl_consumer_channel_attr;
	147
	148	struct ustctl_consumer_channel *
	149	ustctl_create_channel(struct ustctl_consumer_channel_attr *attr);
5224b5c8	150	/*
74d81a6c MD	151	* Each stream created needs to be destroyed before calling
74d81a6c MD	152	* ustctl_destroy_channel().
5224b5c8	153	*/
74d81a6c	154	void ustctl_destroy_channel(struct ustctl_consumer_channel *chan);
f3105c67	155
74d81a6c MD	156	int ustctl_send_channel_to_sessiond(int sock,
74d81a6c MD	157	struct ustctl_consumer_channel *channel);
ff0f5728 MD	158	int ustctl_channel_close_wait_fd(struct ustctl_consumer_channel *consumer_chan);
	159	int ustctl_channel_close_wakeup_fd(struct ustctl_consumer_channel *consumer_chan);
	160	int ustctl_channel_get_wait_fd(struct ustctl_consumer_channel *consumer_chan);
	161	int ustctl_channel_get_wakeup_fd(struct ustctl_consumer_channel *consumer_chan);
c9023c93 MD	162
	163	int ustctl_write_metadata_to_channel(
	164	struct ustctl_consumer_channel *channel,
	165	const char metadata_str, / NOT null-terminated */
	166	size_t len); /* metadata length */
3ef94b0e JD	167	ssize_t ustctl_write_one_packet_to_channel(
	168	struct ustctl_consumer_channel *channel,
	169	const char metadata_str, / NOT null-terminated */
	170	size_t len); /* metadata length */
c9023c93	171
74d81a6c MD	172	/*
	173	* Send a NULL stream to finish iteration over all streams of a given
	174	* channel.
	175	*/
	176	int ustctl_send_stream_to_sessiond(int sock,
	177	struct ustctl_consumer_stream *stream);
	178	int ustctl_stream_close_wait_fd(struct ustctl_consumer_stream *stream);
	179	int ustctl_stream_close_wakeup_fd(struct ustctl_consumer_stream *stream);
ff0f5728 MD	180	int ustctl_stream_get_wait_fd(struct ustctl_consumer_stream *stream);
ff0f5728 MD	181	int ustctl_stream_get_wakeup_fd(struct ustctl_consumer_stream *stream);
f3105c67	182
74d81a6c MD	183	/* Create/destroy stream buffers for read */
	184	struct ustctl_consumer_stream *
	185	ustctl_create_stream(struct ustctl_consumer_channel *channel,
	186	int cpu);
	187	void ustctl_destroy_stream(struct ustctl_consumer_stream *stream);
f3105c67 MD	188
f3105c67 MD	189	/* For mmap mode, readable without "get" operation */
74d81a6c	190	int ustctl_get_mmap_len(struct ustctl_consumer_stream *stream,
f3105c67	191	unsigned long *len);
74d81a6c	192	int ustctl_get_max_subbuf_size(struct ustctl_consumer_stream *stream,
f3105c67 MD	193	unsigned long *len);
	194
	195	/*
	196	* For mmap mode, operate on the current packet (between get/put or
	197	* get_next/put_next).
	198	*/
74d81a6c MD	199	void ustctl_get_mmap_base(struct ustctl_consumer_stream stream);
	200	int ustctl_get_mmap_read_offset(struct ustctl_consumer_stream *stream,
	201	unsigned long *off);
	202	int ustctl_get_subbuf_size(struct ustctl_consumer_stream *stream,
	203	unsigned long *len);
	204	int ustctl_get_padded_subbuf_size(struct ustctl_consumer_stream *stream,
	205	unsigned long *len);
	206	int ustctl_get_next_subbuf(struct ustctl_consumer_stream *stream);
	207	int ustctl_put_next_subbuf(struct ustctl_consumer_stream *stream);
f3105c67 MD	208
	209	/* snapshot */
	210
74d81a6c MD	211	int ustctl_snapshot(struct ustctl_consumer_stream *stream);
	212	int ustctl_snapshot_get_consumed(struct ustctl_consumer_stream *stream,
	213	unsigned long *pos);
	214	int ustctl_snapshot_get_produced(struct ustctl_consumer_stream *stream,
	215	unsigned long *pos);
	216	int ustctl_get_subbuf(struct ustctl_consumer_stream *stream,
	217	unsigned long *pos);
	218	int ustctl_put_subbuf(struct ustctl_consumer_stream *stream);
5f9d3dbc	219
74d81a6c MD	220	void ustctl_flush_buffer(struct ustctl_consumer_stream *stream,
74d81a6c MD	221	int producer_active);
f3105c67	222
b2f3252a JD	223	/* index */
	224	int ustctl_get_timestamp_begin(struct ustctl_consumer_stream *stream,
	225	uint64_t *timestamp_begin);
	226	int ustctl_get_timestamp_end(struct ustctl_consumer_stream *stream,
	227	uint64_t *timestamp_end);
	228	int ustctl_get_events_discarded(struct ustctl_consumer_stream *stream,
	229	uint64_t *events_discarded);
	230	int ustctl_get_content_size(struct ustctl_consumer_stream *stream,
	231	uint64_t *content_size);
	232	int ustctl_get_packet_size(struct ustctl_consumer_stream *stream,
	233	uint64_t *packet_size);
	234	int ustctl_get_stream_id(struct ustctl_consumer_stream *stream,
	235	uint64_t *stream_id);
fca361e8 JD	236	int ustctl_get_current_timestamp(struct ustctl_consumer_stream *stream,
fca361e8 JD	237	uint64_t *ts);
b2f3252a	238
32ce8569 MD	239	/* event registry management */
	240
	241	enum ustctl_socket_type {
	242	USTCTL_SOCKET_CMD = 0,
	243	USTCTL_SOCKET_NOTIFY = 1,
	244	};
	245
	246	enum ustctl_notify_cmd {
	247	USTCTL_NOTIFY_CMD_EVENT = 0,
	248	USTCTL_NOTIFY_CMD_CHANNEL = 1,
	249	};
	250
	251	enum ustctl_channel_header {
	252	USTCTL_CHANNEL_HEADER_UNKNOWN = 0,
	253	USTCTL_CHANNEL_HEADER_COMPACT = 1,
	254	USTCTL_CHANNEL_HEADER_LARGE = 2,
	255	};
	256
	257	/* event type structures */
	258
	259	enum ustctl_abstract_types {
	260	ustctl_atype_integer,
	261	ustctl_atype_enum,
	262	ustctl_atype_array,
	263	ustctl_atype_sequence,
	264	ustctl_atype_string,
	265	ustctl_atype_float,
	266	NR_USTCTL_ABSTRACT_TYPES,
	267	};
	268
	269	enum ustctl_string_encodings {
	270	ustctl_encode_none = 0,
	271	ustctl_encode_UTF8 = 1,
	272	ustctl_encode_ASCII = 2,
	273	NR_USTCTL_STRING_ENCODINGS,
	274	};
	275
	276	#define USTCTL_UST_INTEGER_TYPE_PADDING 24
	277	struct ustctl_integer_type {
	278	uint32_t size; /* in bits */
	279	uint32_t signedness;
	280	uint32_t reverse_byte_order;
	281	uint32_t base; /* 2, 8, 10, 16, for pretty print */
	282	enum ustctl_string_encodings encoding;
	283	uint16_t alignment; /* in bits */
	284	char padding[USTCTL_UST_INTEGER_TYPE_PADDING];
	285	} LTTNG_PACKED;
	286
	287	#define USTCTL_UST_FLOAT_TYPE_PADDING 24
	288	struct ustctl_float_type {
	289	uint32_t exp_dig; /* exponent digits, in bits */
	290	uint32_t mant_dig; /* mantissa digits, in bits */
	291	uint32_t reverse_byte_order;
	292	uint16_t alignment; /* in bits */
	293	char padding[USTCTL_UST_FLOAT_TYPE_PADDING];
	294	} LTTNG_PACKED;
	295
	296	#define USTCTL_UST_BASIC_TYPE_PADDING 296
	297	union _ustctl_basic_type {
	298	struct ustctl_integer_type integer;
	299	struct {
	300	enum ustctl_string_encodings encoding;
	301	} string;
	302	struct ustctl_float_type _float;
303	char padding[USTCTL_UST_BASIC_TYPE_PADDING];
304	} LTTNG_PACKED;
305
306	struct ustctl_basic_type {
307	enum ustctl_abstract_types atype;
308	union {
309	union _ustctl_basic_type basic;
310	} u;
311	} LTTNG_PACKED;
312
313	#define USTCTL_UST_TYPE_PADDING 128
314	struct ustctl_type {
315	enum ustctl_abstract_types atype;
316	union {
317	union _ustctl_basic_type basic;
318	struct {
319	struct ustctl_basic_type elem_type;
320	uint32_t length; /* num. elems. */
321	} array;
322	struct {
323	struct ustctl_basic_type length_type;
324	struct ustctl_basic_type elem_type;
325	} sequence;
326	char padding[USTCTL_UST_TYPE_PADDING];
327	} u;
328	} LTTNG_PACKED;
329
330	#define USTCTL_UST_FIELD_PADDING 28
331	struct ustctl_field {
332	char name[LTTNG_UST_SYM_NAME_LEN];
333	struct ustctl_type type;
334	char padding[USTCTL_UST_FIELD_PADDING];
335	} LTTNG_PACKED;
336
337	/*
338	* Returns 0 on success, negative error value on error.
339	* If an error other than -LTTNG_UST_ERR_UNSUP_MAJOR is returned,
340	* the output fields are not populated.
341	*/
342	int ustctl_recv_reg_msg(int sock,
343	enum ustctl_socket_type *type,
344	uint32_t *major,
345	uint32_t *minor,
346	uint32_t *pid,
347	uint32_t *ppid,
348	uint32_t *uid,
349	uint32_t *gid,
350	uint32_t *bits_per_long,
351	uint32_t *uint8_t_alignment,
352	uint32_t *uint16_t_alignment,
353	uint32_t *uint32_t_alignment,
354	uint32_t *uint64_t_alignment,
355	uint32_t *long_alignment,
356	int *byte_order,
357	char name); / size LTTNG_UST_ABI_PROCNAME_LEN */
358
359	/*
360	* Returns 0 on success, negative UST or system error value on error.
361	* Receive the notification command. The "notify_cmd" can then be used
362	* by the caller to find out which ustctl_recv_* function should be
363	* called to receive the notification, and which ustctl_reply_* is
364	* appropriate.
365	*/
366	int ustctl_recv_notify(int sock, enum ustctl_notify_cmd *notify_cmd);
367
368	/*
369	* Returns 0 on success, negative UST or system error value on error.
370	*/
371	int ustctl_recv_register_event(int sock,
372	int session_objd, / session descriptor (output) */
373	int channel_objd, / channel descriptor (output) */
374	char event_name, /
375	* event name (output,
376	* size LTTNG_UST_SYM_NAME_LEN)
377	*/
378	int *loglevel,
379	char *signature, /
380	* event signature
381	* (output, dynamically
382	* allocated, must be free(3)'d
383	* by the caller if function
384	* returns success.)
385	*/
386	size_t *nr_fields,
387	struct ustctl_field **fields,
388	char **model_emf_uri);
389
390	/*
391	* Returns 0 on success, negative error value on error.
392	*/
393	int ustctl_reply_register_event(int sock,
394	uint32_t id, /* event id (input) */
395	int ret_code); /* return code. 0 ok, negative error */
396
397	/*
398	* Returns 0 on success, negative UST or system error value on error.
399	*/
400	int ustctl_recv_register_channel(int sock,
401	int session_objd, / session descriptor (output) */
402	int channel_objd, / channel descriptor (output) */
403	size_t nr_fields, / context fields */
404	struct ustctl_field **fields);
405
406	/*
407	* Returns 0 on success, negative error value on error.
408	*/
409	int ustctl_reply_register_channel(int sock,
410	uint32_t chan_id,
411	enum ustctl_channel_header header_type,
412	int ret_code); /* return code. 0 ok, negative error */
413
f3105c67	414	#endif /* _LTTNG_UST_CTL_H */