code.delx.au - refind/blob - filesystems/fsw_ext4.h

   1 /**
   2  * \file fsw_ext4.h
   3  * ext4 file system driver header.
   4  */
   5
   6 /*-
   7  * Copyright (c) 2012 Stefan Agner
   8  * Portions Copyright (c) 2006 Christoph Pfisterer
   9  *
  10  * This program is free software; you can redistribute it and/or
  11  * modify it under the terms of the GNU General Public License
  12  * as published by the Free Software Foundation; either version 2
  13  * of the License, or (at your option) any later version.
  14  *
  15  * This program is distributed in the hope that it will be useful,
  16  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  * GNU General Public License for more details.
  19  *
  20  * You should have received a copy of the GNU General Public License
  21  * along with this program; if not, write to the Free Software
  22  * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
  23  */
  24
  25 #ifndef _FSW_EXT4_H_
  26 #define _FSW_EXT4_H_
  27
  28 #define VOLSTRUCTNAME fsw_ext4_volume
  29 #define DNODESTRUCTNAME fsw_ext4_dnode
  30 #include "fsw_core.h"
  31
  32 #include "fsw_ext4_disk.h"
  33
  34
  35 //! Block size to be used when reading the ext4 superblock.
  36 #define EXT4_SUPERBLOCK_BLOCKSIZE  1024
  37 //! Block number where the (master copy of the) ext4 superblock resides.
  38 #define EXT4_SUPERBLOCK_BLOCKNO       1
  39
  40
  41 /**
  42  * ext4: Volume structure with ext2-specific data.
  43  */
  44
  45 struct fsw_ext4_volume {
  46     struct fsw_volume g;            //!< Generic volume structure
  47
  48     struct ext4_super_block *sb;    //!< Full raw ext2 superblock structure
  49     fsw_u32     *inotab_bno;        //!< Block numbers of the inode tables
  50     fsw_u32     ind_bcnt;           //!< Number of blocks addressable through an indirect block
  51     fsw_u32     dind_bcnt;          //!< Number of blocks addressable through a double-indirect block
  52     fsw_u32     inode_size;         //!< Size of inode structure in bytes
  53 };
  54
  55 /**
  56  * ext2: Dnode structure with ext2-specific data.
  57  */
  58
  59 struct fsw_ext4_dnode {
  60     struct fsw_dnode g;             //!< Generic dnode structure
  61
  62     struct ext4_inode *raw;         //!< Full raw inode structure
  63 };
  64
  65
  66 #endif