code.delx.au - refind/blob - filesystems/fsw_hfs.h

   1 /* $Id: fsw_hfs.h 29125 2010-05-06 09:43:05Z vboxsync $ */
   2 /** @file
   3  * fsw_hfs.h - HFS file system driver header.
   4  */
   5
   6 /*
   7  * Copyright (C) 2010 Oracle Corporation
   8  *
   9  * This file is part of VirtualBox Open Source Edition (OSE), as
  10  * available from http://www.virtualbox.org. This file is free software;
  11  * you can redistribute it and/or modify it under the terms of the GNU
  12  * General Public License (GPL) as published by the Free Software
  13  * Foundation, in version 2 as it comes in the "COPYING" file of the
  14  * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
  15  * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
  16  */
  17
  18 #ifndef _FSW_HFS_H_
  19 #define _FSW_HFS_H_
  20
  21 #define VOLSTRUCTNAME fsw_hfs_volume
  22 #define DNODESTRUCTNAME fsw_hfs_dnode
  23
  24 #include "fsw_core.h"
  25
  26
  27 //! Block size for HFS volumes.
  28 #define HFS_BLOCKSIZE            512
  29
  30 //! Block number where the HFS superblock resides.
  31 #define HFS_SUPERBLOCK_BLOCKNO   2
  32
  33 /* Make world look Applish enough for the system header describing HFS layout  */
  34 #define __APPLE_API_PRIVATE
  35 #define __APPLE_API_UNSTABLE
  36
  37 #define u_int8_t  fsw_u8
  38 #define u_int16_t fsw_u16
  39 #define u_int32_t fsw_u32
  40 #define u_int64_t fsw_u64
  41 #define int8_t    fsw_s8
  42 #define int16_t   fsw_s16
  43 #define int32_t   fsw_s32
  44 #define int64_t   fsw_s64
  45
  46 #include "hfs_format.h"
  47
  48 #undef u_int8_t
  49 #undef u_int16_t
  50 #undef u_int32_t
  51 #undef u_int64_t
  52 #undef int8_t
  53 #undef int16_t
  54 #undef int32_t
  55 #undef int64_t
  56
  57 #pragma pack(1)
  58 #ifdef _MSC_VER
  59 /* vasily: disable warning for non-standard anonymous struct/union
  60  * declarations
  61  */
  62 # pragma warning (disable:4201)
  63 # define inline __inline
  64 #endif
  65
  66 struct hfs_dirrec {
  67     fsw_u8      _dummy;
  68 };
  69
  70 struct fsw_hfs_key
  71 {
  72   union
  73   {
  74     struct HFSPlusExtentKey  ext_key;
  75     struct HFSPlusCatalogKey cat_key;
  76     fsw_u16                  key_len; /* Length is at the beginning of all keys */
  77   };
  78 };
  79
  80 #pragma pack()
  81
  82 typedef enum {
  83     /* Regular HFS */
  84     FSW_HFS_PLAIN = 0,
  85     /* HFS+ */
  86     FSW_HFS_PLUS,
  87     /* HFS+ embedded to HFS */
  88     FSW_HFS_PLUS_EMB
  89 } fsw_hfs_kind;
  90
  91 /**
  92  * HFS: Dnode structure with HFS-specific data.
  93  */
  94
  95 struct fsw_hfs_dnode
  96 {
  97   struct fsw_dnode          g;          //!< Generic dnode structure
  98   HFSPlusExtentRecord       extents;
  99   fsw_u32                   ctime;
 100   fsw_u32                   mtime;
 101   fsw_u64                   used_bytes;
 102 };
 103
 104 /**
 105  * HFS: In-memory B-tree structure.
 106  */
 107 struct fsw_hfs_btree
 108 {
 109     fsw_u32                  root_node;
 110     fsw_u32                  node_size;
 111     struct fsw_hfs_dnode*    file;
 112 };
 113
 114
 115 /**
 116  * HFS: In-memory volume structure with HFS-specific data.
 117  */
 118
 119 struct fsw_hfs_volume
 120 {
 121     struct fsw_volume            g;            //!< Generic volume structure
 122
 123     struct HFSPlusVolumeHeader   *primary_voldesc;  //!< Volume Descriptor
 124     struct fsw_hfs_btree          catalog_tree;     // Catalog tree
 125     struct fsw_hfs_btree          extents_tree;     // Extents overflow tree
 126     struct fsw_hfs_dnode          root_file;
 127     int                           case_sensitive;
 128     fsw_u32                       block_size_shift;
 129     fsw_hfs_kind                  hfs_kind;
 130     fsw_u32                       emb_block_off;
 131 };
 132
 133 /* Endianess swappers */
 134 static inline fsw_u16
 135 swab16(fsw_u16 x)
 136 {
 137     return (x<<8 | ((x & 0xff00)>>8));
 138 }
 139
 140 static inline fsw_u32
 141 swab32(fsw_u32 x)
 142 {
 143     return x<<24 | x>>24 |
 144             (x & (fsw_u32)0x0000ff00UL)<<8 |
 145             (x & (fsw_u32)0x00ff0000UL)>>8;
 146 }
 147
 148
 149 static inline fsw_u64
 150 swab64(fsw_u64 x)
 151 {
 152     return x<<56 | x>>56 |
 153             (x & (fsw_u64)0x000000000000ff00ULL)<<40 |
 154             (x & (fsw_u64)0x0000000000ff0000ULL)<<24 |
 155             (x & (fsw_u64)0x00000000ff000000ULL)<< 8 |
 156             (x & (fsw_u64)0x000000ff00000000ULL)>> 8 |
 157             (x & (fsw_u64)0x0000ff0000000000ULL)>>24 |
 158             (x & (fsw_u64)0x00ff000000000000ULL)>>40;
 159 }
 160
 161 static inline fsw_u16
 162 be16_to_cpu(fsw_u16 x)
 163 {
 164     return swab16(x);
 165 }
 166
 167 static inline fsw_u16
 168 cpu_to_be16(fsw_u16 x)
 169 {
 170     return swab16(x);
 171 }
 172
 173
 174 static inline fsw_u32
 175 cpu_to_be32(fsw_u32 x)
 176 {
 177     return swab32(x);
 178 }
 179
 180 static inline fsw_u32
 181 be32_to_cpu(fsw_u32 x)
 182 {
 183     return swab32(x);
 184 }
 185
 186 static inline fsw_u64
 187 be64_to_cpu(fsw_u64 x)
 188 {
 189     return swab64(x);
 190 }
 191
 192 #endif