179455Sobrien/* 279455Sobrien * Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank 379455Sobrien * Copyright (c) 1995 Martin Husemann 479455Sobrien * Some structure declaration borrowed from Paul Popelka 579455Sobrien * (paulp@uts.amdahl.com), see /sys/msdosfs/ for reference. 679455Sobrien * 779455Sobrien * Redistribution and use in source and binary forms, with or without 879455Sobrien * modification, are permitted provided that the following conditions 979455Sobrien * are met: 1079455Sobrien * 1. Redistributions of source code must retain the above copyright 1179455Sobrien * notice, this list of conditions and the following disclaimer. 1279455Sobrien * 2. Redistributions in binary form must reproduce the above copyright 1379455Sobrien * notice, this list of conditions and the following disclaimer in the 1479455Sobrien * documentation and/or other materials provided with the distribution. 1579455Sobrien * 1679455Sobrien * THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR 1779455Sobrien * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 1879455Sobrien * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 1979455Sobrien * IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT, 2079455Sobrien * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 2179455Sobrien * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 2279455Sobrien * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 2379455Sobrien * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 2479455Sobrien * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 2579455Sobrien * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 2679455Sobrien * $NetBSD: dosfs.h,v 1.4 1997/01/03 14:32:48 ws Exp $ 2779455Sobrien * $FreeBSD$ 2879455Sobrien */ 2979455Sobrien 3079455Sobrien#ifndef DOSFS_H 3179455Sobrien#define DOSFS_H 3279455Sobrien 3379455Sobrien#define DOSBOOTBLOCKSIZE 512 3479455Sobrien 3579455Sobrientypedef u_int32_t cl_t; /* type holding a cluster number */ 3679455Sobrien 3779455Sobrien/* 3879455Sobrien * architecture independent description of all the info stored in a 3979455Sobrien * FAT boot block. 4079455Sobrien */ 4179455Sobrienstruct bootblock { 42203874Skib u_int bpbBytesPerSec; /* bytes per sector */ 43203874Skib u_int bpbSecPerClust; /* sectors per cluster */ 44203874Skib u_int bpbResSectors; /* number of reserved sectors */ 45203874Skib u_int bpbFATs; /* number of bpbFATs */ 46203874Skib u_int bpbRootDirEnts; /* number of root directory entries */ 47203874Skib u_int32_t bpbSectors; /* total number of sectors */ 48203874Skib u_int bpbMedia; /* media descriptor */ 49203874Skib u_int bpbFATsmall; /* number of sectors per FAT */ 5079455Sobrien u_int SecPerTrack; /* sectors per track */ 51203874Skib u_int bpbHeads; /* number of heads */ 52203874Skib u_int32_t bpbHiddenSecs; /* # of hidden sectors */ 53203874Skib u_int32_t bpbHugeSectors; /* # of sectors if bpbbpbSectors == 0 */ 54203874Skib cl_t bpbRootClust; /* Start of Root Directory */ 55203874Skib u_int bpbFSInfo; /* FSInfo sector */ 56203874Skib u_int bpbBackup; /* Backup of Bootblocks */ 57203874Skib cl_t FSFree; /* Number of free clusters acc. FSInfo */ 58203874Skib cl_t FSNext; /* Next free cluster acc. FSInfo */ 59203874Skib 60203874Skib /* and some more calculated values */ 61203874Skib u_int flags; /* some flags: */ 62203872Skib#define FAT32 1 /* this is a FAT32 file system */ 63203872Skib /* 64203872Skib * Maybe, we should separate out 65203872Skib * various parts of FAT32? XXX 66203872Skib */ 6779455Sobrien int ValidFat; /* valid fat if FAT32 non-mirrored */ 6879455Sobrien cl_t ClustMask; /* mask for entries in FAT */ 6979455Sobrien cl_t NumClusters; /* # of entries in a FAT */ 7079455Sobrien u_int32_t NumSectors; /* how many sectors are there */ 7179455Sobrien u_int32_t FATsecs; /* how many sectors are in FAT */ 7279455Sobrien u_int32_t NumFatEntries; /* how many entries really are there */ 7379455Sobrien u_int ClusterOffset; /* at what sector would sector 0 start */ 7479455Sobrien u_int ClusterSize; /* Cluster size in bytes */ 7579455Sobrien 7679455Sobrien /* Now some statistics: */ 7779455Sobrien u_int NumFiles; /* # of plain files */ 7879455Sobrien u_int NumFree; /* # of free clusters */ 7979455Sobrien u_int NumBad; /* # of bad clusters */ 8079455Sobrien}; 8179455Sobrien 8279455Sobrienstruct fatEntry { 8379455Sobrien cl_t next; /* pointer to next cluster */ 8479455Sobrien cl_t head; /* pointer to start of chain */ 8579455Sobrien u_int32_t length; /* number of clusters on chain */ 8679455Sobrien int flags; /* see below */ 8779455Sobrien}; 8879455Sobrien 8979455Sobrien#define CLUST_FREE 0 /* 0 means cluster is free */ 9079455Sobrien#define CLUST_FIRST 2 /* 2 is the minimum valid cluster number */ 9179455Sobrien#define CLUST_RSRVD 0xfffffff6 /* start of reserved clusters */ 9279455Sobrien#define CLUST_BAD 0xfffffff7 /* a cluster with a defect */ 9379455Sobrien#define CLUST_EOFS 0xfffffff8 /* start of EOF indicators */ 9479455Sobrien#define CLUST_EOF 0xffffffff /* standard value for last cluster */ 9579455Sobrien 9679455Sobrien/* 9779455Sobrien * Masks for cluster values 9879455Sobrien */ 9979455Sobrien#define CLUST12_MASK 0xfff 10079455Sobrien#define CLUST16_MASK 0xffff 10179455Sobrien#define CLUST32_MASK 0xfffffff 10279455Sobrien 10379455Sobrien#define FAT_USED 1 /* This fat chain is used in a file */ 10479455Sobrien 10579455Sobrien#define DOSLONGNAMELEN 256 /* long name maximal length */ 10679455Sobrien#define LRFIRST 0x40 /* first long name record */ 10779455Sobrien#define LRNOMASK 0x1f /* mask to extract long record 10879455Sobrien * sequence number */ 10979455Sobrien 11079455Sobrien/* 11179455Sobrien * Architecture independent description of a directory entry 11279455Sobrien */ 11379455Sobrienstruct dosDirEntry { 11479455Sobrien struct dosDirEntry 11579455Sobrien *parent, /* previous tree level */ 11679455Sobrien *next, /* next brother */ 11779455Sobrien *child; /* if this is a directory */ 11879455Sobrien char name[8+1+3+1]; /* alias name first part */ 11979455Sobrien char lname[DOSLONGNAMELEN]; /* real name */ 12079455Sobrien uint flags; /* attributes */ 12179455Sobrien cl_t head; /* cluster no */ 12279455Sobrien u_int32_t size; /* filesize in bytes */ 12379455Sobrien uint fsckflags; /* flags during fsck */ 12479455Sobrien}; 12579455Sobrien/* Flags in fsckflags: */ 12679455Sobrien#define DIREMPTY 1 12779455Sobrien#define DIREMPWARN 2 12879455Sobrien 12979455Sobrien/* 13079455Sobrien * TODO-list of unread directories 13179455Sobrien */ 13279455Sobrienstruct dirTodoNode { 13379455Sobrien struct dosDirEntry *dir; 13479455Sobrien struct dirTodoNode *next; 13579455Sobrien}; 13679455Sobrien 13779455Sobrien#endif 138