KernelLand/Modules/Filesystems/Ext2/ext2fs.h

   1 /**\r
   2  * Acess2\r
   3  * \file ext2fs.h\r
   4  * \brief EXT2 Filesystem Driver\r
   5  */\r
   6 #ifndef _EXT2FS_H_\r
   7 #define _EXT2FS_H_\r
   8 \r
   9 /**\r
  10  \name Inode Flag Values\r
  11  \{\r
  12 */\r
  13 #define EXT2_S_IFMT             0xF000  //!< Format Mask\r
  14 #define EXT2_S_IFSOCK   0xC000  //!< Socket\r
  15 #define EXT2_S_IFLNK    0xA000  //!< Symbolic Link\r
  16 #define EXT2_S_IFREG    0x8000  //!< Regular File\r
  17 #define EXT2_S_IFBLK    0x6000  //!< Block Device\r
  18 #define EXT2_S_IFDIR    0x4000  //!< Directory\r
  19 #define EXT2_S_IFCHR    0x2000  //!< Character Device\r
  20 #define EXT2_S_IFIFO    0x1000  //!< FIFO\r
  21 #define EXT2_S_ISUID    0x0800  //!< SUID\r
  22 #define EXT2_S_ISGID    0x0400  //!< SGID\r
  23 #define EXT2_S_ISVTX    0x0200  //!< sticky bit\r
  24 #define EXT2_S_IRWXU    0700    //!< user access rights mask\r
  25 #define EXT2_S_IRUSR    0400    //!< Owner Read\r
  26 #define EXT2_S_IWUSR    0200    //!< Owner Write\r
  27 #define EXT2_S_IXUSR    0100    //!< Owner Execute\r
  28 #define EXT2_S_IRWXG    0070    //!< Group Access rights mask\r
  29 #define EXT2_S_IRGRP    0040    //!< Group Read\r
  30 #define EXT2_S_IWGRP    0020    //!< Group Write\r
  31 #define EXT2_S_IXGRP    0010    //!< Group Execute\r
  32 #define EXT2_S_IRWXO    0007    //!< Global Access rights mask\r
  33 #define EXT2_S_IROTH    0004    //!< Global Read\r
  34 #define EXT2_S_IWOTH    0002    //!< Global Write\r
  35 #define EXT2_S_IXOTH    0001    //!< Global Execute\r
  36 //! \}\r
  37 \r
  38 #define EXT2_NAME_LEN 255       //!< Maximum Name Length\r
  39 \r
  40 // === TYPEDEFS ===\r
  41 typedef struct ext2_inode_s                     tExt2_Inode;    //!< Inode Type\r
  42 typedef struct ext2_super_block_s       tExt2_SuperBlock;       //!< Superblock Type\r
  43 typedef struct ext2_group_desc_s        tExt2_Group;    //!< Group Descriptor Type\r
  44 typedef struct ext2_dir_entry_s         tExt2_DirEnt;   //!< Directory Entry Type\r
  45 \r
  46 // === STRUCTURES ===\r
  47 /**\r
  48  * \brief EXT2 Superblock Structure\r
  49  */\r
  50 struct ext2_super_block_s {\r
  51         Uint32  s_inodes_count;         //!< Inodes count\r
  52         Uint32  s_blocks_count;         //!< Blocks count\r
  53         Uint32  s_r_blocks_count;       //!< Reserved blocks count\r
  54         Uint32  s_free_blocks_count;    //!< Free blocks count\r
  55         \r
  56         Uint32  s_free_inodes_count;    //!< Free inodes count\r
  57         Uint32  s_first_data_block;     //!< First Data Block\r
  58         Uint32  s_log_block_size;       //!< Block size\r
  59         Sint32  s_log_frag_size;        //!< Fragment size\r
  60         \r
  61         Uint32  s_blocks_per_group;     //!< Number Blocks per group\r
  62         Uint32  s_frags_per_group;      //!< Number Fragments per group\r
  63         Uint32  s_inodes_per_group;     //!< Number Inodes per group\r
  64         Uint32  s_mtime;                        //!< Mount time\r
  65         \r
  66         Uint32  s_wtime;                        //!< Write time\r
  67         Uint16  s_mnt_count;            //!< Mount count\r
  68         Sint16  s_max_mnt_count;        //!< Maximal mount count\r
  69         Uint16  s_magic;                        //!< Magic signature\r
  70         Uint16  s_state;                        //!< File system state\r
  71         Uint16  s_errors;                       //!< Behaviour when detecting errors\r
  72         Uint16  s_pad;                          //!< Padding\r
  73         \r
  74         Uint32  s_lastcheck;            //!< time of last check\r
  75         Uint32  s_checkinterval;        //!< max. time between checks\r
  76         Uint32  s_creator_os;           //!< Formatting OS\r
  77         Uint32  s_rev_level;            //!< Revision level\r
  78         \r
  79         Uint16  s_def_resuid;           //!< Default uid for reserved blocks\r
  80         Uint16  s_def_resgid;           //!< Default gid for reserved blocks\r
  81         Uint32  s_reserved[235];        //!< Padding to the end of the block\r
  82 };\r
  83 \r
  84 /**\r
  85  * \struct ext2_inode_s\r
  86  * \brief EXT2 Inode Definition\r
  87  */\r
  88 struct ext2_inode_s {\r
  89         Uint16 i_mode;  //!< File mode\r
  90         Uint16 i_uid;   //!< Owner Uid\r
  91         Uint32 i_size;  //!< Size in bytes\r
  92         Uint32 i_atime; //!< Access time\r
  93         Uint32 i_ctime; //!< Creation time\r
  94         Uint32 i_mtime; //!< Modification time\r
  95         Uint32 i_dtime; //!< Deletion Time\r
  96         Uint16 i_gid;   //!< Group Id\r
  97         Uint16 i_links_count;   //!< Links count\r
  98         Uint32 i_blocks;        //!< Number of blocks allocated for the file\r
  99         Uint32 i_flags; //!< File flags\r
 100         union {\r
 101                 Uint32 linux_reserved1; //!< Linux: Reserved\r
 102                 Uint32 hurd_translator; //!< HURD: Translator\r
 103                 Uint32 masix_reserved1; //!< Masix: Reserved\r
 104         } osd1; //!< OS dependent 1\r
 105         Uint32 i_block[15];     //!< Pointers to blocks\r
 106         Uint32 i_version;       //!< File version (for NFS)\r
 107         Uint32 i_file_acl;      //!< File ACL\r
 108         Uint32 i_dir_acl;       //!< Directory ACL / Extended File Size\r
 109         Uint32 i_faddr;         //!< Fragment address\r
 110         union {\r
 111                 struct {\r
 112                         Uint8 l_i_frag; //!< Fragment number\r
 113                         Uint8 l_i_fsize;        //!< Fragment size\r
 114                         Uint16 i_pad1;  //!< Padding\r
 115                         Uint32 l_i_reserved2[2];        //!< Reserved\r
 116                 } linux2;\r
 117                 struct {\r
 118                         Uint8 h_i_frag; //!< Fragment number\r
 119                         Uint8 h_i_fsize; //!< Fragment size\r
 120                         Uint16 h_i_mode_high;   //!< Mode High Bits\r
 121                         Uint16 h_i_uid_high;    //!< UID High Bits\r
 122                         Uint16 h_i_gid_high;    //!< GID High Bits\r
 123                         Uint32 h_i_author;      //!< Creator ID\r
 124                 } hurd2;\r
 125                 struct {\r
 126                         Uint8 m_i_frag; //!< Fragment number\r
 127                         Uint8 m_i_fsize;        //!< Fragment size\r
 128                         Uint16 m_pad1;  //!< Padding\r
 129                         Uint32 m_i_reserved2[2];        //!< reserved\r
 130                 } masix2;\r
 131         } osd2; //!< OS dependent 2\r
 132 };\r
 133 \r
 134 /**\r
 135  * \struct ext2_group_desc_s\r
 136  * \brief EXT2 Group Descriptor\r
 137  */\r
 138 struct ext2_group_desc_s {\r
 139         Uint32  bg_block_bitmap;        //!< Blocks bitmap block\r
 140         Uint32  bg_inode_bitmap;        //!< Inodes bitmap block\r
 141         Uint32  bg_inode_table; //!< Inodes table block\r
 142         Uint16  bg_free_blocks_count;   //!< Free blocks count\r
 143         Uint16  bg_free_inodes_count;   //!< Free inodes count\r
 144         Uint16  bg_used_dirs_count;     //!< Directories count\r
 145         Uint16  bg_pad; //!< Padding\r
 146         Uint32  bg_reserved[3]; //!< Reserved\r
 147 };\r
 148 \r
 149 /**\r
 150  * \brief EXT2 Directory Entry\r
 151  * \note The name may take up less than 255 characters\r
 152  */\r
 153 struct ext2_dir_entry_s {\r
 154         Uint32  inode;          //!< Inode number\r
 155         Uint16  rec_len;        //!< Directory entry length\r
 156         Uint8   name_len;       //!< Short Name Length\r
 157         Uint8   type;           //!< File Type (Duplicate of ext2_inode_s.i_mode)\r
 158         char    name[EXT2_NAME_LEN+1];          //!< File name\r
 159 };\r
 160 #define EXT2_DIRENT_SIZE        (sizeof(struct ext2_dir_entry_s)-EXT2_NAME_LEN+1)\r
 161 \r
 162 #endif\r