145 lines
5.3 KiB
C
145 lines
5.3 KiB
C
/*
|
|
* Copyright (C) 1995, 1996, 1997 Wolfgang Solfrank
|
|
* Copyright (c) 1995 Martin Husemann
|
|
* Some structure declaration borrowed from Paul Popelka
|
|
* (paulp@uts.amdahl.com), see /sys/msdosfs/ for reference.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Martin Husemann
|
|
* and Wolfgang Solfrank.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
|
|
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
|
|
* IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY DIRECT, INDIRECT,
|
|
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
|
|
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
|
|
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
|
|
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
|
|
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
|
|
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
|
|
* $NetBSD: dosfs.h,v 1.4 1997/01/03 14:32:48 ws Exp $
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#ifndef DOSFS_H
|
|
#define DOSFS_H
|
|
|
|
#define DOSBOOTBLOCKSIZE 512
|
|
|
|
typedef u_int32_t cl_t; /* type holding a cluster number */
|
|
|
|
/*
|
|
* architecture independent description of all the info stored in a
|
|
* FAT boot block.
|
|
*/
|
|
struct bootblock {
|
|
u_int BytesPerSec; /* bytes per sector */
|
|
u_int SecPerClust; /* sectors per cluster */
|
|
u_int ResSectors; /* number of reserved sectors */
|
|
u_int FATs; /* number of FATs */
|
|
u_int RootDirEnts; /* number of root directory entries */
|
|
u_int Media; /* media descriptor */
|
|
u_int FATsmall; /* number of sectors per FAT */
|
|
u_int SecPerTrack; /* sectors per track */
|
|
u_int Heads; /* number of heads */
|
|
u_int32_t Sectors; /* total number of sectors */
|
|
u_int32_t HiddenSecs; /* # of hidden sectors */
|
|
u_int32_t HugeSectors; /* # of sectors if bpbSectors == 0 */
|
|
u_int FSInfo; /* FSInfo sector */
|
|
u_int Backup; /* Backup of Bootblocks */
|
|
cl_t RootCl; /* Start of Root Directory */
|
|
cl_t FSFree; /* Number of free clusters acc. FSInfo */
|
|
cl_t FSNext; /* Next free cluster acc. FSInfo */
|
|
|
|
/* and some more calculated values */
|
|
u_int flags; /* some flags: */
|
|
#define FAT32 1 /* this is a FAT32 file system */
|
|
/*
|
|
* Maybe, we should separate out
|
|
* various parts of FAT32? XXX
|
|
*/
|
|
int ValidFat; /* valid fat if FAT32 non-mirrored */
|
|
cl_t ClustMask; /* mask for entries in FAT */
|
|
cl_t NumClusters; /* # of entries in a FAT */
|
|
u_int32_t NumSectors; /* how many sectors are there */
|
|
u_int32_t FATsecs; /* how many sectors are in FAT */
|
|
u_int32_t NumFatEntries; /* how many entries really are there */
|
|
u_int ClusterOffset; /* at what sector would sector 0 start */
|
|
u_int ClusterSize; /* Cluster size in bytes */
|
|
|
|
/* Now some statistics: */
|
|
u_int NumFiles; /* # of plain files */
|
|
u_int NumFree; /* # of free clusters */
|
|
u_int NumBad; /* # of bad clusters */
|
|
};
|
|
|
|
struct fatEntry {
|
|
cl_t next; /* pointer to next cluster */
|
|
cl_t head; /* pointer to start of chain */
|
|
u_int32_t length; /* number of clusters on chain */
|
|
int flags; /* see below */
|
|
};
|
|
|
|
#define CLUST_FREE 0 /* 0 means cluster is free */
|
|
#define CLUST_FIRST 2 /* 2 is the minimum valid cluster number */
|
|
#define CLUST_RSRVD 0xfffffff6 /* start of reserved clusters */
|
|
#define CLUST_BAD 0xfffffff7 /* a cluster with a defect */
|
|
#define CLUST_EOFS 0xfffffff8 /* start of EOF indicators */
|
|
#define CLUST_EOF 0xffffffff /* standard value for last cluster */
|
|
|
|
/*
|
|
* Masks for cluster values
|
|
*/
|
|
#define CLUST12_MASK 0xfff
|
|
#define CLUST16_MASK 0xffff
|
|
#define CLUST32_MASK 0xfffffff
|
|
|
|
#define FAT_USED 1 /* This fat chain is used in a file */
|
|
|
|
#define DOSLONGNAMELEN 256 /* long name maximal length */
|
|
#define LRFIRST 0x40 /* first long name record */
|
|
#define LRNOMASK 0x1f /* mask to extract long record
|
|
* sequence number */
|
|
|
|
/*
|
|
* Architecture independent description of a directory entry
|
|
*/
|
|
struct dosDirEntry {
|
|
struct dosDirEntry
|
|
*parent, /* previous tree level */
|
|
*next, /* next brother */
|
|
*child; /* if this is a directory */
|
|
char name[8+1+3+1]; /* alias name first part */
|
|
char lname[DOSLONGNAMELEN]; /* real name */
|
|
uint flags; /* attributes */
|
|
cl_t head; /* cluster no */
|
|
u_int32_t size; /* filesize in bytes */
|
|
uint fsckflags; /* flags during fsck */
|
|
};
|
|
/* Flags in fsckflags: */
|
|
#define DIREMPTY 1
|
|
#define DIREMPWARN 2
|
|
|
|
/*
|
|
* TODO-list of unread directories
|
|
*/
|
|
struct dirTodoNode {
|
|
struct dosDirEntry *dir;
|
|
struct dirTodoNode *next;
|
|
};
|
|
|
|
#endif
|