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/* $Id: fat.h,v 1.3 1995/05/30 08:07:34 rgrimes Exp $ */
/* $NetBSD: fat.h,v 1.4 1994/08/21 18:43:57 ws Exp $ */
/*-
* Copyright (C) 1994 Wolfgang Solfrank.
* Copyright (C) 1994 TooLs GmbH.
* All rights reserved.
* Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
*
* 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 TooLs GmbH.
* 4. The name of TooLs GmbH may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``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 TOOLS GMBH 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.
*/
/*
* Written by Paul Popelka (paulp@uts.amdahl.com)
*
* You can do anything you want with this software, just don't say you wrote
* it, and don't remove this notice.
*
* This software is provided "as is".
*
* The author supplies this software to be publicly redistributed on the
* understanding that the author is not responsible for the correct
* functioning of this software in any circumstances and is not liable for
* any damages caused by this software.
*
* October 1992
*/
/*
* Some useful cluster numbers.
*/
#define MSDOSFSROOT 0 /* cluster 0 means the root dir */
#define CLUST_FREE 0 /* cluster 0 also means a free cluster */
#define MSDOSFSFREE CLUST_FREE
#define CLUST_FIRST 2 /* first legal cluster number */
#define CLUST_RSRVS 0xfff0 /* start of reserved cluster range */
#define CLUST_RSRVE 0xfff6 /* end of reserved cluster range */
#define CLUST_BAD 0xfff7 /* a cluster with a defect */
#define CLUST_EOFS 0xfff8 /* start of eof cluster range */
#define CLUST_EOFE 0xffff /* end of eof cluster range */
#define FAT12_MASK 0x0fff /* mask for 12 bit cluster numbers */
#define FAT16_MASK 0xffff /* mask for 16 bit cluster numbers */
/*
* Return true if filesystem uses 12 bit fats. Microsoft Programmer's
* Reference says if the maximum cluster number in a filesystem is greater
* than 4086 then we've got a 16 bit fat filesystem.
*/
#define FAT12(pmp) (pmp->pm_maxcluster <= 4086)
#define FAT16(pmp) (pmp->pm_maxcluster > 4086)
#define MSDOSFSEOF(cn) (((cn) & 0xfff8) == 0xfff8)
#ifdef KERNEL
/*
* These are the values for the function argument to the function
* fatentry().
*/
#define FAT_GET 0x0001 /* get a fat entry */
#define FAT_SET 0x0002 /* set a fat entry */
#define FAT_GET_AND_SET (FAT_GET | FAT_SET)
/*
* Flags to extendfile:
*/
#define DE_CLEAR 1 /* Zero out the blocks allocated */
int pcbmap __P((struct denode *dep, u_long findcn, daddr_t *bnp, u_long *cnp));
int clusterfree __P((struct msdosfsmount *pmp, u_long cn, u_long *oldcnp));
int clusteralloc __P((struct msdosfsmount *pmp, u_long start, u_long count, u_long fillwith, u_long *retcluster, u_long *got));
int fatentry __P((int function, struct msdosfsmount *pmp, u_long cluster, u_long *oldcontents, u_long newcontents));
int freeclusterchain __P((struct msdosfsmount *pmp, u_long startchain));
int extendfile __P((struct denode *dep, u_long count, struct buf **bpp, u_long *ncp, int flags));
void fc_purge __P((struct denode *dep, u_int frcn));
int readep __P((struct msdosfsmount *pmp, u_long dirclu, u_long dirofs, struct buf **bpp, struct direntry **epp));
int readde __P((struct denode *dep, struct buf **bpp, struct direntry **epp));
int deextend __P((struct denode *dep, off_t length, struct ucred *cred));
int fillinusemap __P((struct msdosfsmount *pmp));
int reinsert __P((struct denode *dep));
int dosdirempty __P((struct denode *dep));
int createde __P((struct denode *dep, struct denode *ddep, struct denode **depp));
int deupdat __P((struct denode *dep, struct timespec *tp, int waitfor));
int removede __P((struct denode *pdep, struct denode *dep));
int detrunc __P((struct denode *dep, u_long length, int flags, struct ucred *cred, struct proc *p));
int doscheckpath __P(( struct denode *source, struct denode *target));
#endif /* KERNEL */
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