fs/hfs_mdb.h

   1 /*
   2  *   Creation Date: <2000/09/03 23:04:27 samuel>
   3  *   Time-stamp: <2000/09/04 01:23:55 samuel>
   4  *
   5  *      <hfs_mdb.h>
   6  *
   7  *      HFS Master Directory Block (MDB)
   8  *
   9  *   This program is free software; you can redistribute it and/or
  10  *   modify it under the terms of the GNU General Public License
  11  *   as published by the Free Software Foundation
  12  *
  13  */
  14
  15 #ifndef _H_HFS_MDB
  16 #define _H_HFS_MDB
  17
  18 #include "libc/byteorder.h"
  19
  20 typedef unsigned char hfs_char_t;
  21 typedef unsigned char hfs_ushort_t[2];
  22 typedef unsigned char hfs_uint_t[4];
  23
  24 static inline unsigned short hfs_get_ushort(hfs_ushort_t addr)
  25 {
  26         return __be16_to_cpu(*((unsigned short *)(addr)));
  27 }
  28
  29 static inline unsigned int hfs_get_uint(hfs_uint_t addr)
  30 {
  31         return __be32_to_cpu(*((unsigned int *)(addr)));
  32 }
  33
  34 /*
  35  * The HFS Master Directory Block (MDB).
  36  *
  37  * Also known as the Volume Information Block (VIB), this structure is
  38  * the HFS equivalent of a superblock.
  39  *
  40  * Reference: _Inside Macintosh: Files_ pages 2-59 through 2-62
  41  *
  42  * modified for HFS Extended
  43  */
  44
  45 typedef struct hfs_mdb {
  46         hfs_ushort_t    drSigWord;      /* Signature word indicating fs type */
  47         hfs_uint_t      drCrDate;       /* fs creation date/time */
  48         hfs_uint_t      drLsMod;        /* fs modification date/time */
  49         hfs_ushort_t    drAtrb;         /* fs attributes */
  50         hfs_ushort_t    drNmFls;        /* number of files in root directory */
  51         hfs_ushort_t    drVBMSt;        /* location (in 512-byte blocks)
  52                                            of the volume bitmap */
  53         hfs_ushort_t    drAllocPtr;     /* location (in allocation blocks)
  54                                            to begin next allocation search */
  55         hfs_ushort_t    drNmAlBlks;     /* number of allocation blocks */
  56         hfs_uint_t      drAlBlkSiz;     /* bytes in an allocation block */
  57         hfs_uint_t      drClpSiz;       /* clumpsize, the number of bytes to
  58                                            allocate when extending a file */
  59         hfs_ushort_t    drAlBlSt;       /* location (in 512-byte blocks)
  60                                            of the first allocation block */
  61         hfs_uint_t      drNxtCNID;      /* CNID to assign to the next
  62                                            file or directory created */
  63         hfs_ushort_t    drFreeBks;      /* number of free allocation blocks */
  64         hfs_char_t      drVN[28];       /* the volume label */
  65         hfs_uint_t      drVolBkUp;      /* fs backup date/time */
  66         hfs_ushort_t    drVSeqNum;      /* backup sequence number */
  67         hfs_uint_t      drWrCnt;        /* fs write count */
  68         hfs_uint_t      drXTClpSiz;     /* clumpsize for the extents B-tree */
  69         hfs_uint_t      drCTClpSiz;     /* clumpsize for the catalog B-tree */
  70         hfs_ushort_t    drNmRtDirs;     /* number of directories in
  71                                            the root directory */
  72         hfs_uint_t      drFilCnt;       /* number of files in the fs */
  73         hfs_uint_t      drDirCnt;       /* number of directories in the fs */
  74         hfs_char_t      drFndrInfo[32]; /* data used by the Finder */
  75         hfs_ushort_t    drEmbedSigWord; /* embedded volume signature */
  76         hfs_uint_t      drEmbedExtent;  /* starting block number (xdrStABN)
  77                                            and number of allocation blocks
  78                                            (xdrNumABlks) occupied by embedded
  79                                            volume */
  80         hfs_uint_t      drXTFlSize;     /* bytes in the extents B-tree */
  81         hfs_char_t      drXTExtRec[12]; /* extents B-tree's first 3 extents */
  82         hfs_uint_t      drCTFlSize;     /* bytes in the catalog B-tree */
  83         hfs_char_t      drCTExtRec[12]; /* catalog B-tree's first 3 extents */
  84 } hfs_mdb_t;
  85
  86 #define HFS_PLUS_SIGNATURE      0x482b          /* 'H+' */
  87 #define HFS_SIGNATURE           0x4244          /* HFS / embedded HFS+ */
  88
  89
  90 typedef struct hfs_plus_mdb
  91 {
  92         unsigned short  signature;
  93         unsigned short  version;
  94         unsigned int    attributes;
  95         unsigned int    lastMountedVersion;
  96         unsigned int    reserved;
  97
  98         unsigned int    createDate;
  99         unsigned int    modifyDate;
 100         unsigned int    backupDate;
 101         unsigned int    checkedDate;
 102
 103         unsigned int    fileCount;
 104         unsigned int    folderCount;
 105
 106         unsigned int    blockSize;
 107         unsigned int    totalBlocks;
 108         unsigned int    freeBlocks;
 109
 110         unsigned int    nextAllocation;
 111         unsigned int    rsrcClumpSize;
 112         unsigned int    dataClumpSize;
 113
 114         /* ... there are more fields here ... */
 115 } hfs_plus_mdb_t;
 116
 117
 118 #endif   /* _H_HFS_MDB */