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

/*
 * Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
 *                      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; only version 2
 * of the License.
 *
 * 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., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */

#ifndef _LTTNG_UST_CTL_H
#define _LTTNG_UST_CTL_H

#include "lttng-ust-abi.h"

int ustctl_register_done(int sock);
int ustctl_create_session(int sock);
int ustctl_open_metadata(int sock, int session_handle,
		struct lttng_ust_channel_attr *chops,
		struct lttng_ust_object_data **metadata_data);
int ustctl_create_channel(int sock, int session_handle,
		struct lttng_ust_channel_attr *chops,
		struct lttng_ust_object_data **channel_data);
int ustctl_create_stream(int sock, struct lttng_ust_object_data *channel_data,
		struct lttng_ust_object_data **stream_data);
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_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 -ENOENT is returned.
 */
int ustctl_tracepoint_list_get(int sock, int tp_list_handle,
		struct lttng_ust_tracepoint_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);

/* not implemented yet */
struct lttng_ust_calibrate;
int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate);

/*
 * Map channel lttng_ust_shm_handle and add streams. Typically performed by the
 * consumer to map the objects into its memory space.
 */
struct lttng_ust_shm_handle *ustctl_map_channel(struct lttng_ust_object_data *chan_data);
int ustctl_add_stream(struct lttng_ust_shm_handle *lttng_ust_shm_handle,
		struct lttng_ust_object_data *stream_data);
/*
 * Note: the lttng_ust_object_data from which the lttng_ust_shm_handle is derived can only
 * be released after unmapping the handle.
 */
void ustctl_unmap_channel(struct lttng_ust_shm_handle *lttng_ust_shm_handle);

/* Buffer operations */

struct lttng_ust_shm_handle;
struct lttng_ust_lib_ring_buffer;

/* Open/close stream buffers for read */
struct lttng_ust_lib_ring_buffer *ustctl_open_stream_read(struct lttng_ust_shm_handle *handle,
		int cpu);
void ustctl_close_stream_read(struct lttng_ust_shm_handle *handle,
                struct lttng_ust_lib_ring_buffer *buf);

/* For mmap mode, readable without "get" operation */
int ustctl_get_mmap_len(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf,
		unsigned long *len);
int ustctl_get_max_subbuf_size(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf,
		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 lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf);
int ustctl_get_mmap_read_offset(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf, unsigned long *off);
int ustctl_get_subbuf_size(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf, unsigned long *len);
int ustctl_get_padded_subbuf_size(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf, unsigned long *len);
int ustctl_get_next_subbuf(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf);
int ustctl_put_next_subbuf(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf);

/* snapshot */

int ustctl_snapshot(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf);
int ustctl_snapshot_get_consumed(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos);
int ustctl_snapshot_get_produced(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos);
int ustctl_get_subbuf(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf, unsigned long *pos);
int ustctl_put_subbuf(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf);

void ustctl_flush_buffer(struct lttng_ust_shm_handle *handle,
		struct lttng_ust_lib_ring_buffer *buf,
		int producer_active);

/* 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);

#endif /* _LTTNG_UST_CTL_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 - Julien Desfossez <julien.desfossez@polymtl.ca>
	3	* Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
	4	*
	5	* This program is free software; you can redistribute it and/or
	6	* modify it under the terms of the GNU General Public License
	7	* as published by the Free Software Foundation; only version 2
	8	* of the License.
	9	*
	10	* This program is distributed in the hope that it will be useful,
	11	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	13	* GNU General Public License for more details.
	14	*
	15	* You should have received a copy of the GNU General Public License
	16	* along with this program; if not, write to the Free Software
	17	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	18	*/
	19
	20	#ifndef _LTTNG_UST_CTL_H
	21	#define _LTTNG_UST_CTL_H
	22
	23	#include "lttng-ust-abi.h"
	24
	25	int ustctl_register_done(int sock);
	26	int ustctl_create_session(int sock);
	27	int ustctl_open_metadata(int sock, int session_handle,
	28	struct lttng_ust_channel_attr *chops,
	29	struct lttng_ust_object_data **metadata_data);
	30	int ustctl_create_channel(int sock, int session_handle,
	31	struct lttng_ust_channel_attr *chops,
	32	struct lttng_ust_object_data **channel_data);
	33	int ustctl_create_stream(int sock, struct lttng_ust_object_data *channel_data,
	34	struct lttng_ust_object_data **stream_data);
	35	int ustctl_create_event(int sock, struct lttng_ust_event *ev,
	36	struct lttng_ust_object_data *channel_data,
	37	struct lttng_ust_object_data **event_data);
	38	int ustctl_add_context(int sock, struct lttng_ust_context *ctx,
	39	struct lttng_ust_object_data *obj_data,
	40	struct lttng_ust_object_data **context_data);
	41
	42	int ustctl_enable(int sock, struct lttng_ust_object_data *object);
	43	int ustctl_disable(int sock, struct lttng_ust_object_data *object);
	44	int ustctl_start_session(int sock, int handle);
	45	int ustctl_stop_session(int sock, int handle);
	46
	47	/*
	48	* ustctl_tracepoint_list returns a tracepoint list handle, or negative
	49	* error value.
	50	*/
	51	int ustctl_tracepoint_list(int sock);
	52	/*
	53	* ustctl_tracepoint_list_get is used to iterate on the tp list
	54	* handle. End is iteration is reached when -ENOENT is returned.
	55	*/
	56	int ustctl_tracepoint_list_get(int sock, int tp_list_handle,
	57	struct lttng_ust_tracepoint_iter *iter);
	58
	59	int ustctl_tracer_version(int sock, struct lttng_ust_tracer_version *v);
	60	int ustctl_wait_quiescent(int sock);
	61
	62	int ustctl_sock_flush_buffer(int sock, struct lttng_ust_object_data *object);
	63
	64	/* not implemented yet */
	65	struct lttng_ust_calibrate;
	66	int ustctl_calibrate(int sock, struct lttng_ust_calibrate *calibrate);
	67
	68	/*
	69	* Map channel lttng_ust_shm_handle and add streams. Typically performed by the
	70	* consumer to map the objects into its memory space.
	71	*/
	72	struct lttng_ust_shm_handle ustctl_map_channel(struct lttng_ust_object_data chan_data);
	73	int ustctl_add_stream(struct lttng_ust_shm_handle *lttng_ust_shm_handle,
	74	struct lttng_ust_object_data *stream_data);
	75	/*
	76	* Note: the lttng_ust_object_data from which the lttng_ust_shm_handle is derived can only
	77	* be released after unmapping the handle.
	78	*/
	79	void ustctl_unmap_channel(struct lttng_ust_shm_handle *lttng_ust_shm_handle);
	80
	81	/* Buffer operations */
	82
	83	struct lttng_ust_shm_handle;
	84	struct lttng_ust_lib_ring_buffer;
	85
	86	/* Open/close stream buffers for read */
	87	struct lttng_ust_lib_ring_buffer ustctl_open_stream_read(struct lttng_ust_shm_handle handle,
	88	int cpu);
	89	void ustctl_close_stream_read(struct lttng_ust_shm_handle *handle,
	90	struct lttng_ust_lib_ring_buffer *buf);
	91
	92	/* For mmap mode, readable without "get" operation */
	93	int ustctl_get_mmap_len(struct lttng_ust_shm_handle *handle,
	94	struct lttng_ust_lib_ring_buffer *buf,
	95	unsigned long *len);
	96	int ustctl_get_max_subbuf_size(struct lttng_ust_shm_handle *handle,
	97	struct lttng_ust_lib_ring_buffer *buf,
	98	unsigned long *len);
	99
	100	/*
	101	* For mmap mode, operate on the current packet (between get/put or
	102	* get_next/put_next).
	103	*/
	104	void ustctl_get_mmap_base(struct lttng_ust_shm_handle handle,
	105	struct lttng_ust_lib_ring_buffer *buf);
	106	int ustctl_get_mmap_read_offset(struct lttng_ust_shm_handle *handle,
	107	struct lttng_ust_lib_ring_buffer buf, unsigned long off);
	108	int ustctl_get_subbuf_size(struct lttng_ust_shm_handle *handle,
	109	struct lttng_ust_lib_ring_buffer buf, unsigned long len);
	110	int ustctl_get_padded_subbuf_size(struct lttng_ust_shm_handle *handle,
	111	struct lttng_ust_lib_ring_buffer buf, unsigned long len);
	112	int ustctl_get_next_subbuf(struct lttng_ust_shm_handle *handle,
	113	struct lttng_ust_lib_ring_buffer *buf);
	114	int ustctl_put_next_subbuf(struct lttng_ust_shm_handle *handle,
	115	struct lttng_ust_lib_ring_buffer *buf);
	116
	117	/* snapshot */
	118
	119	int ustctl_snapshot(struct lttng_ust_shm_handle *handle,
	120	struct lttng_ust_lib_ring_buffer *buf);
	121	int ustctl_snapshot_get_consumed(struct lttng_ust_shm_handle *handle,
	122	struct lttng_ust_lib_ring_buffer buf, unsigned long pos);
	123	int ustctl_snapshot_get_produced(struct lttng_ust_shm_handle *handle,
	124	struct lttng_ust_lib_ring_buffer buf, unsigned long pos);
	125	int ustctl_get_subbuf(struct lttng_ust_shm_handle *handle,
	126	struct lttng_ust_lib_ring_buffer buf, unsigned long pos);
	127	int ustctl_put_subbuf(struct lttng_ust_shm_handle *handle,
	128	struct lttng_ust_lib_ring_buffer *buf);
	129
	130	void ustctl_flush_buffer(struct lttng_ust_shm_handle *handle,
	131	struct lttng_ust_lib_ring_buffer *buf,
	132	int producer_active);
	133
	134	/* Release object created by members of this API */
	135	int ustctl_release_object(int sock, struct lttng_ust_object_data *data);
	136	/* Release handle returned by create session. */
	137	int ustctl_release_handle(int sock, int handle);
	138
	139	#endif /* _LTTNG_UST_CTL_H */