Return to fat.h CVS log

Up to [local] / sys / msdosfs

Annotation of sys/msdosfs/fat.h, Revision 1.1

1.1     ! nbrk        1: /*     $OpenBSD: fat.h,v 1.9 2006/12/15 03:04:24 krw Exp $     */
        !             2: /*     $NetBSD: fat.h,v 1.11 1997/10/17 11:23:49 ws Exp $      */
        !             3:
        !             4: /*-
        !             5:  * Copyright (C) 1994, 1997 Wolfgang Solfrank.
        !             6:  * Copyright (C) 1994, 1997 TooLs GmbH.
        !             7:  * All rights reserved.
        !             8:  * Original code by Paul Popelka (paulp@uts.amdahl.com) (see below).
        !             9:  *
        !            10:  * Redistribution and use in source and binary forms, with or without
        !            11:  * modification, are permitted provided that the following conditions
        !            12:  * are met:
        !            13:  * 1. Redistributions of source code must retain the above copyright
        !            14:  *    notice, this list of conditions and the following disclaimer.
        !            15:  * 2. Redistributions in binary form must reproduce the above copyright
        !            16:  *    notice, this list of conditions and the following disclaimer in the
        !            17:  *    documentation and/or other materials provided with the distribution.
        !            18:  * 3. All advertising materials mentioning features or use of this software
        !            19:  *    must display the following acknowledgement:
        !            20:  *     This product includes software developed by TooLs GmbH.
        !            21:  * 4. The name of TooLs GmbH may not be used to endorse or promote products
        !            22:  *    derived from this software without specific prior written permission.
        !            23:  *
        !            24:  * THIS SOFTWARE IS PROVIDED BY TOOLS GMBH ``AS IS'' AND ANY EXPRESS OR
        !            25:  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
        !            26:  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
        !            27:  * IN NO EVENT SHALL TOOLS GMBH BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
        !            28:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
        !            29:  * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
        !            30:  * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
        !            31:  * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
        !            32:  * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
        !            33:  * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
        !            34:  */
        !            35: /*
        !            36:  * Written by Paul Popelka (paulp@uts.amdahl.com)
        !            37:  *
        !            38:  * You can do anything you want with this software, just don't say you wrote
        !            39:  * it, and don't remove this notice.
        !            40:  *
        !            41:  * This software is provided "as is".
        !            42:  *
        !            43:  * The author supplies this software to be publicly redistributed on the
        !            44:  * understanding that the author is not responsible for the correct
        !            45:  * functioning of this software in any circumstances and is not liable for
        !            46:  * any damages caused by this software.
        !            47:  *
        !            48:  * October 1992
        !            49:  */
        !            50:
        !            51: /*
        !            52:  * Some useful cluster numbers.
        !            53:  */
        !            54: #define        MSDOSFSROOT     0               /* cluster 0 means the root dir */
        !            55: #define        CLUST_FREE      0               /* cluster 0 also means a free cluster */
        !            56: #define        MSDOSFSFREE     CLUST_FREE
        !            57: #define        CLUST_FIRST     2               /* first legal cluster number */
        !            58: #define        CLUST_RSRVD     0xfffffff6      /* reserved cluster range */
        !            59: #define        CLUST_BAD       0xfffffff7      /* a cluster with a defect */
        !            60: #define        CLUST_EOFS      0xfffffff8      /* start of eof cluster range */
        !            61: #define        CLUST_EOFE      0xffffffff      /* end of eof cluster range */
        !            62:
        !            63: #define        FAT12_MASK      0x00000fff      /* mask for 12 bit cluster numbers */
        !            64: #define        FAT16_MASK      0x0000ffff      /* mask for 16 bit cluster numbers */
        !            65: #define        FAT32_MASK      0x0fffffff      /* mask for FAT32 cluster numbers */
        !            66:
        !            67: /*
        !            68:  * MSDOSFS:
        !            69:  * Return true if filesystem uses 12 bit fats. Microsoft Programmer's
        !            70:  * Reference says if the maximum cluster number in a filesystem is greater
        !            71:  * than 4078 ((CLUST_RSRVS - CLUST_FIRST) & FAT12_MASK) then we've got a
        !            72:  * 16 bit fat filesystem. While mounting, the result of this test is stored
        !            73:  * in pm_fatentrysize.
        !            74:  */
        !            75: #define        FAT12(pmp)      (pmp->pm_fatmask == FAT12_MASK)
        !            76: #define        FAT16(pmp)      (pmp->pm_fatmask == FAT16_MASK)
        !            77: #define        FAT32(pmp)      (pmp->pm_fatmask == FAT32_MASK)
        !            78:
        !            79: #define        MSDOSFSEOF(pmp, cn)     ((((cn) | ~(pmp)->pm_fatmask) & CLUST_EOFS) == CLUST_EOFS)
        !            80:
        !            81: #ifdef _KERNEL
        !            82: /*
        !            83:  * These are the values for the function argument to the function
        !            84:  * fatentry().
        !            85:  */
        !            86: #define        FAT_GET         0x0001  /* get a fat entry */
        !            87: #define        FAT_SET         0x0002  /* set a fat entry */
        !            88: #define        FAT_GET_AND_SET (FAT_GET | FAT_SET)
        !            89:
        !            90: /*
        !            91:  * Flags to extendfile:
        !            92:  */
        !            93: #define        DE_CLEAR        1       /* Zero out the blocks allocated */
        !            94:
        !            95: int pcbmap(struct denode *, uint32_t, daddr64_t *, uint32_t *, int *);
        !            96: int clusterfree(struct msdosfsmount *, uint32_t, uint32_t *);
        !            97: int clusteralloc(struct msdosfsmount *, uint32_t, uint32_t, uint32_t, uint32_t *, uint32_t *);
        !            98: int extendfile(struct denode *, uint32_t, struct buf **, uint32_t *, int);
        !            99: int fatentry(int, struct msdosfsmount *, uint32_t, uint32_t *, uint32_t);
        !           100: void fc_purge(struct denode *, u_int);
        !           101: void fc_lookup(struct denode *, uint32_t, uint32_t *, uint32_t *);
        !           102: int fillinusemap(struct msdosfsmount *);
        !           103: int freeclusterchain(struct msdosfsmount *, uint32_t);
        !           104: #endif /* _KERNEL */