/*
 *         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];
};

#endif                                /* __CONNECTOR_H */