code.delx.au - refind/blob - filesystems/fsw_ext2.h

   1 /**
   2  * \file fsw_ext2.h
   3  * ext2 file system driver header.
   4  */
   5
   6 /*-
   7  * Copyright (c) 2006 Christoph Pfisterer
   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; either version 2
  12  * of the License, or (at your option) any later version.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  22  */
  23
  24 #ifndef _FSW_EXT2_H_
  25 #define _FSW_EXT2_H_
  26
  27 #define VOLSTRUCTNAME fsw_ext2_volume
  28 #define DNODESTRUCTNAME fsw_ext2_dnode
  29 #include "fsw_core.h"
  30
  31 #include "fsw_ext2_disk.h"
  32
  33
  34 //! Block size to be used when reading the ext2 superblock.
  35 #define EXT2_SUPERBLOCK_BLOCKSIZE  1024
  36 //! Block number where the (master copy of the) ext2 superblock resides.
  37 #define EXT2_SUPERBLOCK_BLOCKNO       1
  38
  39
  40 /**
  41  * ext2: Volume structure with ext2-specific data.
  42  */
  43
  44 struct fsw_ext2_volume {
  45     struct fsw_volume g;            //!< Generic volume structure
  46
  47     struct ext2_super_block *sb;    //!< Full raw ext2 superblock structure
  48     fsw_u32     *inotab_bno;        //!< Block numbers of the inode tables
  49     fsw_u32     ind_bcnt;           //!< Number of blocks addressable through an indirect block
  50     fsw_u32     dind_bcnt;          //!< Number of blocks addressable through a double-indirect block
  51     fsw_u32     inode_size;         //!< Size of inode structure in bytes
  52 };
  53
  54 /**
  55  * ext2: Dnode structure with ext2-specific data.
  56  */
  57
  58 struct fsw_ext2_dnode {
  59     struct fsw_dnode g;             //!< Generic dnode structure
  60
  61     struct ext2_inode *raw;         //!< Full raw inode structure
  62 };
  63
  64
  65 #endif