[lttng-tools.git] / src / bin / lttng-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, version 2 only,
 * as published by the Free Software Foundation.
 *
 * 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 _LTT_TRACE_KERNEL_H
#define _LTT_TRACE_KERNEL_H

#include <urcu/list.h>

#include <lttng/lttng.h>
#include <common/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;
	/*
	 * TODO: need internal representation to support more than a
	 * single context.
	 */
	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;
	/*
	 * TODO: need internal representation to support more than a
	 * single context.
	 */
	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 consumer_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;
	/* UID/GID of the user owning the session */
	uid_t uid;
	gid_t gid;
};

/*
 * 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 modify
	5	* it under the terms of the GNU General Public License, version 2 only,
	6	* as published by the Free Software Foundation.
	7	*
	8	* This program is distributed in the hope that it will be useful,
	9	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	10	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	11	* GNU General Public License for more details.
	12	*
	13	* You should have received a copy of the GNU General Public License along
	14	* with this program; if not, write to the Free Software Foundation, Inc.,
	15	* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
	16	*/
	17
	18	#ifndef _LTT_TRACE_KERNEL_H
	19	#define _LTT_TRACE_KERNEL_H
	20
	21	#include <urcu/list.h>
	22
	23	#include <lttng/lttng.h>
	24	#include <common/lttng-kernel.h>
	25
	26	/* Kernel event list */
	27	struct ltt_kernel_event_list {
	28	struct cds_list_head head;
	29	};
	30
	31	/* Channel stream list */
	32	struct ltt_kernel_stream_list {
	33	struct cds_list_head head;
	34	};
	35
	36	/* Channel list */
	37	struct ltt_kernel_channel_list {
	38	struct cds_list_head head;
	39	};
	40
	41	/* Kernel event */
	42	struct ltt_kernel_event {
	43	int fd;
	44	int enabled;
	45	/*
	46	* TODO: need internal representation to support more than a
	47	* single context.
	48	*/
	49	struct lttng_kernel_context *ctx;
	50	struct lttng_kernel_event *event;
	51	struct cds_list_head list;
	52	};
	53
	54	/* Kernel channel */
	55	struct ltt_kernel_channel {
	56	int fd;
	57	int enabled;
	58	char *pathname;
	59	unsigned int stream_count;
	60	unsigned int event_count;
	61	/*
	62	* TODO: need internal representation to support more than a
	63	* single context.
	64	*/
	65	struct lttng_kernel_context *ctx;
	66	struct lttng_channel *channel;
	67	struct ltt_kernel_event_list events_list;
	68	struct ltt_kernel_stream_list stream_list;
	69	struct cds_list_head list;
	70	};
	71
	72	/* Metadata */
	73	struct ltt_kernel_metadata {
	74	int fd;
	75	char *pathname;
	76	struct lttng_channel *conf;
	77	};
	78
	79	/* Channel stream */
	80	struct ltt_kernel_stream {
	81	int fd;
	82	char *pathname;
	83	int state;
	84	struct cds_list_head list;
	85	};
	86
	87	/* Kernel session */
	88	struct ltt_kernel_session {
	89	int fd;
	90	int metadata_stream_fd;
	91	int consumer_fds_sent;
	92	int consumer_fd;
	93	unsigned int channel_count;
	94	unsigned int stream_count_global;
	95	char *trace_path;
	96	struct ltt_kernel_metadata *metadata;
	97	struct ltt_kernel_channel_list channel_list;
	98	/* UID/GID of the user owning the session */
	99	uid_t uid;
	100	gid_t gid;
	101	};
	102
	103	/*
	104	* Lookup functions. NULL is returned if not found.
	105	*/
	106	struct ltt_kernel_event *trace_kernel_get_event_by_name(
	107	char name, struct ltt_kernel_channel channel);
	108	struct ltt_kernel_channel *trace_kernel_get_channel_by_name(
	109	char name, struct ltt_kernel_session session);
	110
	111	/*
	112	* Create functions malloc() the data structure.
	113	*/
	114	struct ltt_kernel_session trace_kernel_create_session(char path);
	115	struct ltt_kernel_channel trace_kernel_create_channel(struct lttng_channel chan, char *path);
	116	struct ltt_kernel_event trace_kernel_create_event(struct lttng_event ev);
	117	struct ltt_kernel_metadata trace_kernel_create_metadata(char path);
	118	struct ltt_kernel_stream *trace_kernel_create_stream(void);
	119
	120	/*
	121	* Destroy functions free() the data structure and remove from linked list if
	122	* it's applies.
	123	*/
	124	void trace_kernel_destroy_session(struct ltt_kernel_session *session);
	125	void trace_kernel_destroy_metadata(struct ltt_kernel_metadata *metadata);
	126	void trace_kernel_destroy_channel(struct ltt_kernel_channel *channel);
	127	void trace_kernel_destroy_event(struct ltt_kernel_event *event);
	128	void trace_kernel_destroy_stream(struct ltt_kernel_stream *stream);
	129
	130	#endif /* _LTT_TRACE_KERNEL_H */