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| 2 | pj | 1 | /* |
| 2 | * Project: S.Ha.R.K. |
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| 3 | * |
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| 4 | * Coordinators: |
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| 5 | * Giorgio Buttazzo <giorgio@sssup.it> |
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| 6 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 7 | * |
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| 8 | * Authors : |
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| 9 | * Paolo Gai <pj@gandalf.sssup.it> |
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| 10 | * Massimiliano Giorgi <massy@gandalf.sssup.it> |
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| 11 | * Luca Abeni <luca@gandalf.sssup.it> |
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| 12 | * (see the web pages for full authors list) |
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| 13 | * |
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| 14 | * ReTiS Lab (Scuola Superiore S.Anna - Pisa - Italy) |
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| 15 | * |
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| 16 | * http://www.sssup.it |
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| 17 | * http://retis.sssup.it |
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| 18 | * http://shark.sssup.it |
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| 19 | */ |
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| 20 | |||
| 21 | |||
| 22 | /* |
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| 23 | * Copyright (C) 1999 Massimiliano Giorgi |
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| 24 | * |
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| 25 | * This program is free software; you can redistribute it and/or modify |
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| 26 | * it under the terms of the GNU General Public License as published by |
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| 27 | * the Free Software Foundation; either version 2 of the License, or |
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| 28 | * (at your option) any later version. |
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| 29 | * |
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| 30 | * This program is distributed in the hope that it will be useful, |
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| 31 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 32 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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| 33 | * GNU General Public License for more details. |
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| 34 | * |
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| 35 | * You should have received a copy of the GNU General Public License |
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| 36 | * along with this program; if not, write to the Free Software |
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| 37 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
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| 38 | * |
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| 39 | */ |
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| 40 | |||
| 41 | /* |
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| 42 | * CVS : $Id: bdev.h,v 1.1.1.1 2002-03-29 14:12:49 pj Exp $ |
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| 43 | * |
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| 44 | * File: $File$ |
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| 45 | * Revision: $Revision: 1.1.1.1 $ |
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| 46 | * Last update: $Date: 2002-03-29 14:12:49 $ |
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| 47 | */ |
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| 48 | |||
| 49 | #ifndef __BDEV_H__ |
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| 50 | #define __BDEV_H__ |
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| 51 | |||
| 52 | #include "glue.h" |
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| 53 | #include <fs/bdevinit.h> |
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| 54 | #include <fs/bdev.h> |
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| 55 | |||
| 56 | #define MAXBLOCKDEVICE 8 |
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| 57 | |||
| 58 | struct block_device { |
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| 59 | |||
| 60 | #ifdef _PARANOIA |
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| 61 | __uint32_t magic; |
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| 62 | #endif |
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| 63 | |||
| 64 | char *bd_name; |
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| 65 | int bd_sectorsize; |
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| 66 | |||
| 67 | __uint32_t bd_flag_used:1; |
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| 68 | |||
| 69 | struct block_device_operations *bd_op; |
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| 70 | }; |
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| 71 | |||
| 72 | #define MAXBLOCKDEVICEMINOR 16 |
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| 73 | |||
| 74 | struct block_device_minor { |
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| 75 | |||
| 76 | #ifdef _PARANOIA |
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| 77 | __uint32_t magic; |
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| 78 | #endif |
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| 79 | |||
| 80 | __dev_t bdm_device; |
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| 81 | __uint8_t bdm_fsind; |
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| 82 | #define MAXDEVICENAME 16 |
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| 83 | char bdm_name[MAXDEVICENAME+1]; |
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| 84 | }; |
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| 85 | |||
| 86 | struct block_device_operations { |
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| 87 | int (*_trylock)(__dev_t device); |
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| 88 | int (*_tryunlock)(__dev_t device); |
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| 89 | int (*read)(__dev_t device, __blkcnt_t blocknum, __uint8_t *buffer); |
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| 90 | int (*seek)(__dev_t device, __blkcnt_t blocknum); |
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| 91 | int (*write)(__dev_t device, __blkcnt_t blocknum, __uint8_t *buffer); |
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| 92 | }; |
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| 93 | |||
| 94 | #define TRYLOCK_OK BDEV_OK |
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| 95 | #define TRYLOCK_CANT BDEV_FAIL |
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| 96 | #define TRYLOCK_ERR BDEV_ERROR |
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| 97 | #define TRYUNLOCK_OK TRYLOCK_OK |
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| 98 | #define TRYUNLOCK_CANT TRYLOCK_CANT |
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| 99 | #define TRYUNLOCK_ERR TRYLOCK_ERR |
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| 100 | |||
| 101 | int bdev_register(__dev_t major,char *name,struct block_device *); |
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| 102 | int bdev_register_minor(__dev_t device, char *name,__uint8_t fsind); |
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| 103 | |||
| 104 | int bdev_read(__dev_t dev, __blkcnt_t blocknum, __uint8_t *buffer); |
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| 105 | int bdev_seek(__dev_t dev, __blkcnt_t blocknum); |
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| 106 | int bdev_write(__dev_t dev, __blkcnt_t blocknum, __uint8_t *buffer); |
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| 107 | |||
| 108 | #endif |