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/*
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 * Project: S.Ha.R.K.
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 *
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 * Coordinators:
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 *   Giorgio Buttazzo    <giorgio@sssup.it>
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *
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 * Authors     :
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 *   Paolo Gai           <pj@gandalf.sssup.it>
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 *   Massimiliano Giorgi <massy@gandalf.sssup.it>
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 *   Luca Abeni          <luca@gandalf.sssup.it>
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 *   (see the web pages for full authors list)
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 *
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 * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy)
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 *
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 * http://www.sssup.it
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 * http://retis.sssup.it
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 * http://shark.sssup.it
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 */
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/*
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 * Copyright (C) 1999 Massimiliano Giorgi
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 *
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 * This program is free software; you can redistribute it and/or modify
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 * it under the terms of the GNU General Public License as published by
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 * the Free Software Foundation; either version 2 of the License, or
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 * (at your option) any later version.
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 *
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 * This program is distributed in the hope that it will be useful,
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 * but WITHOUT ANY WARRANTY; without even the implied warranty of
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 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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 * GNU General Public License for more details.
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 *
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 * You should have received a copy of the GNU General Public License
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 * along with this program; if not, write to the Free Software
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 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
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 *
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 */
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/*
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 * CVS :        $Id: bdev.h,v 1.2 2003-03-13 13:43:13 pj Exp $
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 *
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 * File:        $File$
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 * Revision:    $Revision: 1.2 $
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 * Last update: $Date: 2003-03-13 13:43:13 $
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 */
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#ifndef __BDEV_H__
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#define __BDEV_H__
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#include "glue.h"
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#include <fs/bdevinit.h>
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#include <fs/bdev.h>
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#include "ll/sys/cdefs.h"
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__BEGIN_DECLS
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#define MAXBLOCKDEVICE 8
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struct block_device {
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#ifdef _PARANOIA
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  __uint32_t magic;
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#endif
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  char       *bd_name;
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  int        bd_sectorsize;
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  __uint32_t bd_flag_used:1;
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  struct block_device_operations *bd_op;
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};
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#define MAXBLOCKDEVICEMINOR 16
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struct block_device_minor {
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#ifdef _PARANOIA
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  __uint32_t magic;
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#endif
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  __dev_t              bdm_device;
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  __uint8_t            bdm_fsind;
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#define MAXDEVICENAME 16
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  char                 bdm_name[MAXDEVICENAME+1];
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};
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struct block_device_operations {
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  int (*_trylock)(__dev_t device);
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  int (*_tryunlock)(__dev_t device);
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  int (*read)(__dev_t device, __blkcnt_t blocknum, __uint8_t *buffer);
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  int (*seek)(__dev_t device, __blkcnt_t blocknum);
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  int (*write)(__dev_t device, __blkcnt_t blocknum, __uint8_t *buffer);
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};
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#define TRYLOCK_OK     BDEV_OK
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#define TRYLOCK_CANT   BDEV_FAIL
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#define TRYLOCK_ERR    BDEV_ERROR
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#define TRYUNLOCK_OK   TRYLOCK_OK 
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#define TRYUNLOCK_CANT TRYLOCK_CANT
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#define TRYUNLOCK_ERR  TRYLOCK_ERR
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int bdev_register(__dev_t major,char *name,struct block_device *);
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int bdev_register_minor(__dev_t device, char *name,__uint8_t fsind);
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int bdev_read(__dev_t dev, __blkcnt_t blocknum, __uint8_t *buffer);
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int bdev_seek(__dev_t dev, __blkcnt_t blocknum);
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int bdev_write(__dev_t dev, __blkcnt_t blocknum, __uint8_t *buffer);
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__END_DECLS
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#endif