[deliverable/linux.git] / include / linux / connector.h

/*
 * 	connector.h
 * 
 * 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
 * All rights reserved.
 * 
 * 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; either version 2 of the License, or
 * (at your option) any later version.
 *
 * 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 __CONNECTOR_H
#define __CONNECTOR_H

#include <linux/types.h>

/*
 * Process Events connector unique ids -- used for message routing
 */
#define CN_IDX_PROC			0x1
#define CN_VAL_PROC			0x1
#define CN_IDX_CIFS			0x2
#define CN_VAL_CIFS                     0x1
#define CN_W1_IDX			0x3	/* w1 communication */
#define CN_W1_VAL			0x1
#define CN_IDX_V86D			0x4
#define CN_VAL_V86D_UVESAFB		0x1
#define CN_IDX_BB			0x5	/* BlackBoard, from the TSP GPL sampling framework */
#define CN_DST_IDX			0x6
#define CN_DST_VAL			0x1
#define CN_IDX_DM			0x7	/* Device Mapper */
#define CN_VAL_DM_USERSPACE_LOG		0x1
#define CN_IDX_DRBD			0x8
#define CN_VAL_DRBD			0x1

#define CN_NETLINK_USERS		8

/*
 * Maximum connector's message size.
 */
#define CONNECTOR_MAX_MSG_SIZE		16384

/*
 * idx and val are unique identifiers which 
 * are used for message routing and 
 * must be registered in connector.h for in-kernel usage.
 */

struct cb_id {
	__u32 idx;
	__u32 val;
};

struct cn_msg {
	struct cb_id id;

	__u32 seq;
	__u32 ack;

	__u16 len;		/* Length of the following data */
	__u16 flags;
	__u8 data[0];
};

#ifdef __KERNEL__

#include <asm/atomic.h>

#include <linux/list.h>
#include <linux/workqueue.h>

#include <net/sock.h>

#define CN_CBQ_NAMELEN		32

struct cn_queue_dev {
	atomic_t refcnt;
	unsigned char name[CN_CBQ_NAMELEN];

	struct workqueue_struct *cn_queue;
	/* Sent to kevent to create cn_queue only when needed */
	struct work_struct wq_creation;
	/* Tell if the wq_creation job is pending/completed */
	atomic_t wq_requested;
	/* Wait for cn_queue to be created */
	wait_queue_head_t wq_created;

	struct list_head queue_list;
	spinlock_t queue_lock;

	struct sock *nls;
};

struct cn_callback_id {
	unsigned char name[CN_CBQ_NAMELEN];
	struct cb_id id;
};

struct cn_callback_data {
	struct sk_buff *skb;
	void (*callback) (struct cn_msg *, struct netlink_skb_parms *);

	void *free;
};

struct cn_callback_entry {
	struct list_head callback_entry;
	struct work_struct work;
	struct cn_queue_dev *pdev;

	struct cn_callback_id id;
	struct cn_callback_data data;

	u32 seq, group;
};

struct cn_dev {
	struct cb_id id;

	u32 seq, groups;
	struct sock *nls;
	void (*input) (struct sk_buff *skb);

	struct cn_queue_dev *cbdev;
};

int cn_add_callback(struct cb_id *, char *, void (*callback) (struct cn_msg *, struct netlink_skb_parms *));
void cn_del_callback(struct cb_id *);
int cn_netlink_send(struct cn_msg *, u32, gfp_t);

int cn_queue_add_callback(struct cn_queue_dev *dev, char *name, struct cb_id *id, void (*callback)(struct cn_msg *, struct netlink_skb_parms *));
void cn_queue_del_callback(struct cn_queue_dev *dev, struct cb_id *id);

int queue_cn_work(struct cn_callback_entry *cbq, struct work_struct *work);

struct cn_queue_dev *cn_queue_alloc_dev(char *name, struct sock *);
void cn_queue_free_dev(struct cn_queue_dev *dev);

int cn_cb_equal(struct cb_id *, struct cb_id *);

void cn_queue_wrapper(struct work_struct *work);

#endif				/* __KERNEL__ */
#endif				/* __CONNECTOR_H */
Commit	Line	Data
	1	/*
	2	* connector.h
	3	*
	4	* 2004-2005 Copyright (c) Evgeniy Polyakov <johnpol@2ka.mipt.ru>
	5	* All rights reserved.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; either version 2 of the License, or
	10	* (at your option) any later version.
	11	*
	12	* This program is distributed in the hope that it will be useful,
	13	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	14	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	15	* GNU General Public License for more details.
	16	*
	17	* You should have received a copy of the GNU General Public License
	18	* along with this program; if not, write to the Free Software
	19	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	20	*/
	21
	22	#ifndef __CONNECTOR_H
	23	#define __CONNECTOR_H
	24
	25	#include <linux/types.h>
	26
	27	/*
	28	* Process Events connector unique ids -- used for message routing
	29	*/
	30	#define CN_IDX_PROC 0x1
	31	#define CN_VAL_PROC 0x1
	32	#define CN_IDX_CIFS 0x2
	33	#define CN_VAL_CIFS 0x1
	34	#define CN_W1_IDX 0x3 /* w1 communication */
	35	#define CN_W1_VAL 0x1
	36	#define CN_IDX_V86D 0x4
	37	#define CN_VAL_V86D_UVESAFB 0x1
	38	#define CN_IDX_BB 0x5 /* BlackBoard, from the TSP GPL sampling framework */
	39	#define CN_DST_IDX 0x6
	40	#define CN_DST_VAL 0x1
	41	#define CN_IDX_DM 0x7 /* Device Mapper */
	42	#define CN_VAL_DM_USERSPACE_LOG 0x1
	43	#define CN_IDX_DRBD 0x8
	44	#define CN_VAL_DRBD 0x1
	45
	46	#define CN_NETLINK_USERS 8
	47
	48	/*
	49	* Maximum connector's message size.
	50	*/
	51	#define CONNECTOR_MAX_MSG_SIZE 16384
	52
	53	/*
	54	* idx and val are unique identifiers which
	55	* are used for message routing and
	56	* must be registered in connector.h for in-kernel usage.
	57	*/
	58
	59	struct cb_id {
	60	__u32 idx;
	61	__u32 val;
	62	};
	63
	64	struct cn_msg {
	65	struct cb_id id;
	66
	67	__u32 seq;
	68	__u32 ack;
	69
	70	__u16 len; /* Length of the following data */
	71	__u16 flags;
	72	__u8 data[0];
	73	};
	74
	75	#ifdef __KERNEL__
	76
	77	#include <asm/atomic.h>
	78
	79	#include <linux/list.h>
	80	#include <linux/workqueue.h>
	81
	82	#include <net/sock.h>
	83
	84	#define CN_CBQ_NAMELEN 32
	85
	86	struct cn_queue_dev {
	87	atomic_t refcnt;
	88	unsigned char name[CN_CBQ_NAMELEN];
	89
	90	struct workqueue_struct *cn_queue;
	91	/* Sent to kevent to create cn_queue only when needed */
	92	struct work_struct wq_creation;
	93	/* Tell if the wq_creation job is pending/completed */
	94	atomic_t wq_requested;
	95	/* Wait for cn_queue to be created */
	96	wait_queue_head_t wq_created;
	97
	98	struct list_head queue_list;
	99	spinlock_t queue_lock;
	100
	101	struct sock *nls;
	102	};
	103
	104	struct cn_callback_id {
	105	unsigned char name[CN_CBQ_NAMELEN];
	106	struct cb_id id;
	107	};
	108
	109	struct cn_callback_data {
	110	struct sk_buff *skb;
	111	void (callback) (struct cn_msg , struct netlink_skb_parms *);
	112
	113	void *free;
	114	};
	115
	116	struct cn_callback_entry {
	117	struct list_head callback_entry;
	118	struct work_struct work;
	119	struct cn_queue_dev *pdev;
	120
	121	struct cn_callback_id id;
	122	struct cn_callback_data data;
	123
	124	u32 seq, group;
	125	};
	126
	127	struct cn_dev {
	128	struct cb_id id;
	129
	130	u32 seq, groups;
	131	struct sock *nls;
	132	void (input) (struct sk_buff skb);
	133
	134	struct cn_queue_dev *cbdev;
	135	};
	136
	137	int cn_add_callback(struct cb_id , char , void (callback) (struct cn_msg , struct netlink_skb_parms *));
	138	void cn_del_callback(struct cb_id *);
	139	int cn_netlink_send(struct cn_msg *, u32, gfp_t);
	140
	141	int cn_queue_add_callback(struct cn_queue_dev dev, char name, struct cb_id id, void (callback)(struct cn_msg , struct netlink_skb_parms ));
	142	void cn_queue_del_callback(struct cn_queue_dev dev, struct cb_id id);
	143
	144	int queue_cn_work(struct cn_callback_entry cbq, struct work_struct work);
	145
	146	struct cn_queue_dev cn_queue_alloc_dev(char name, struct sock *);
	147	void cn_queue_free_dev(struct cn_queue_dev *dev);
	148
	149	int cn_cb_equal(struct cb_id , struct cb_id );
	150
	151	void cn_queue_wrapper(struct work_struct *work);
	152
	153	#endif /* __KERNEL__ */
	154	#endif /* __CONNECTOR_H */