[lttng-tools.git] / ltt-sessiond / trace-kernel.h

/*
 * Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
 *
 * 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 _LTT_TRACE_KERNEL_H
#define _LTT_TRACE_KERNEL_H

#include <limits.h>
#include <urcu/list.h>

#include <lttng/lttng.h>
#include <lttng-kernel.h>

/* Kernel event list */
struct ltt_kernel_event_list {
	struct cds_list_head head;
};

/* Channel stream list */
struct ltt_kernel_stream_list {
	struct cds_list_head head;
};

/* Channel list */
struct ltt_kernel_channel_list {
	struct cds_list_head head;
};

/* Kernel event */
struct ltt_kernel_event {
	int fd;
	int enabled;
	struct lttng_kernel_context *ctx;
	struct lttng_kernel_event *event;
	struct cds_list_head list;
};

/* Kernel channel */
struct ltt_kernel_channel {
	int fd;
	int enabled;
	char *pathname;
	unsigned int stream_count;
	unsigned int event_count;
	struct lttng_kernel_context *ctx;
	struct lttng_channel *channel;
	struct ltt_kernel_event_list events_list;
	struct ltt_kernel_stream_list stream_list;
	struct cds_list_head list;
};

/* Metadata */
struct ltt_kernel_metadata {
	int fd;
	char *pathname;
	struct lttng_channel *conf;
};

/* Channel stream */
struct ltt_kernel_stream {
	int fd;
	char *pathname;
	int state;
	struct cds_list_head list;
};

/* Kernel session */
struct ltt_kernel_session {
	int fd;
	int metadata_stream_fd;
	int kconsumer_fds_sent;
	int consumer_fd;
	unsigned int channel_count;
	unsigned int stream_count_global;
	char *trace_path;
	struct ltt_kernel_metadata *metadata;
	struct ltt_kernel_channel_list channel_list;
};

/*
 * Lookup functions. NULL is returned if not found.
 */
struct ltt_kernel_event *trace_kernel_get_event_by_name(
		char *name, struct ltt_kernel_channel *channel);
struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
		char *name, struct ltt_kernel_session *session);

/*
 * Create functions malloc() the data structure.
 */
struct ltt_kernel_session *trace_kernel_create_session(char *path);
struct ltt_kernel_channel *trace_kernel_create_channel(struct lttng_channel *chan, char *path);
struct ltt_kernel_event *trace_kernel_create_event(struct lttng_event *ev);
struct ltt_kernel_metadata *trace_kernel_create_metadata(char *path);
struct ltt_kernel_stream *trace_kernel_create_stream(void);

/*
 * Destroy functions free() the data structure and remove from linked list if
 * it's applies.
 */
void trace_kernel_destroy_session(struct ltt_kernel_session *session);
void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata);
void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel);
void trace_kernel_destroy_event(struct ltt_kernel_event *event);
void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream);

#endif /* _LTT_TRACE_KERNEL_H */
Commit	Line	Data
	1	/*
	2	* Copyright (C) 2011 - David Goulet <david.goulet@polymtl.ca>
	3	*
	4	* This program is free software; you can redistribute it and/or
	5	* modify it under the terms of the GNU General Public License
	6	* as published by the Free Software Foundation; only version 2
	7	* of the License.
	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	*
	14	* You should have received a copy of the GNU General Public License
	15	* along with this program; if not, write to the Free Software
	16	* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
	17	*/
	18
	19	#ifndef _LTT_TRACE_KERNEL_H
	20	#define _LTT_TRACE_KERNEL_H
	21
	22	#include <limits.h>
	23	#include <urcu/list.h>
	24
	25	#include <lttng/lttng.h>
	26	#include <lttng-kernel.h>
	27
	28	/* Kernel event list */
	29	struct ltt_kernel_event_list {
	30	struct cds_list_head head;
	31	};
	32
	33	/* Channel stream list */
	34	struct ltt_kernel_stream_list {
	35	struct cds_list_head head;
	36	};
	37
	38	/* Channel list */
	39	struct ltt_kernel_channel_list {
	40	struct cds_list_head head;
	41	};
	42
	43	/* Kernel event */
	44	struct ltt_kernel_event {
	45	int fd;
	46	int enabled;
	47	struct lttng_kernel_context *ctx;
	48	struct lttng_kernel_event *event;
	49	struct cds_list_head list;
	50	};
	51
	52	/* Kernel channel */
	53	struct ltt_kernel_channel {
	54	int fd;
	55	int enabled;
	56	char *pathname;
	57	unsigned int stream_count;
	58	unsigned int event_count;
	59	struct lttng_kernel_context *ctx;
	60	struct lttng_channel *channel;
	61	struct ltt_kernel_event_list events_list;
	62	struct ltt_kernel_stream_list stream_list;
	63	struct cds_list_head list;
	64	};
	65
	66	/* Metadata */
	67	struct ltt_kernel_metadata {
	68	int fd;
	69	char *pathname;
	70	struct lttng_channel *conf;
	71	};
	72
	73	/* Channel stream */
	74	struct ltt_kernel_stream {
	75	int fd;
	76	char *pathname;
	77	int state;
	78	struct cds_list_head list;
	79	};
	80
	81	/* Kernel session */
	82	struct ltt_kernel_session {
	83	int fd;
	84	int metadata_stream_fd;
	85	int kconsumer_fds_sent;
	86	int consumer_fd;
	87	unsigned int channel_count;
	88	unsigned int stream_count_global;
	89	char *trace_path;
	90	struct ltt_kernel_metadata *metadata;
	91	struct ltt_kernel_channel_list channel_list;
	92	};
	93
	94	/*
	95	* Lookup functions. NULL is returned if not found.
	96	*/
	97	struct ltt_kernel_event *trace_kernel_get_event_by_name(
	98	char name, struct ltt_kernel_channel channel);
	99	struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
	100	char name, struct ltt_kernel_session session);
	101
	102	/*
	103	* Create functions malloc() the data structure.
	104	*/
	105	struct ltt_kernel_session trace_kernel_create_session(char path);
	106	struct ltt_kernel_channel trace_kernel_create_channel(struct lttng_channel chan, char *path);
	107	struct ltt_kernel_event trace_kernel_create_event(struct lttng_event ev);
	108	struct ltt_kernel_metadata trace_kernel_create_metadata(char path);
	109	struct ltt_kernel_stream *trace_kernel_create_stream(void);
	110
	111	/*
	112	* Destroy functions free() the data structure and remove from linked list if
	113	* it's applies.
	114	*/
	115	void trace_kernel_destroy_session(struct ltt_kernel_session *session);
	116	void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata);
	117	void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel);
	118	void trace_kernel_destroy_event(struct ltt_kernel_event *event);
	119	void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream);
	120
	121	#endif /* _LTT_TRACE_KERNEL_H */