; $Id: ext2_fs.inc,v 1.3 2005/01/06 22:34:06 hpa Exp $ ; ----------------------------------------------------------------------- ; ; Copyright 1998-1999 H. Peter Anvin - All Rights Reserved ; ; This program is free software; you can redistribute it and/or modify ; it under the terms of the GNU General Public License as published by ; the Free Software Foundation, Inc., 675 Mass Ave, Cambridge MA 02139, ; USA; either version 2 of the License, or (at your option) any later ; version; incorporated herein by reference. ; ; ----------------------------------------------------------------------- ; ; ext2_fs.inc ; ; NASM include file for ext2fs data structures ; %define EXT2_SUPER_MAGIC 0xEF53 %define EXT2_GOOD_OLD_REV 0 ; The good old (original) format %define EXT2_DYNAMIC_REV 1 ; V2 format w/ dynamic inode sizes %define EXT2_GOOD_OLD_INODE_SIZE 128 ; Special inode numbers %define EXT2_BAD_INO 1 ; Bad blocks inode %define EXT2_ROOT_INO 2 ; Root inode %define EXT2_BOOT_LOADER_INO 5 ; Boot loader inode %define EXT2_UNDEL_DIR_INO 6 ; Undelete directory inode %define EXT3_RESIZE_INO 7 ; Reserved group descriptors inode %define EXT3_JOURNAL_INO 8 ; Journal inode ; We're readonly, so we only care about incompat features. %define EXT2_FEATURE_INCOMPAT_COMPRESSION 0x0001 %define EXT2_FEATURE_INCOMPAT_FILETYPE 0x0002 %define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 %define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 %define EXT2_FEATURE_INCOMPAT_META_BG 0x0010 %define EXT2_FEATURE_INCOMPAT_ANY 0xffffffff %define EXT2_NDIR_BLOCKS 12 %define EXT2_IND_BLOCK EXT2_NDIR_BLOCKS %define EXT2_DIND_BLOCK (EXT2_IND_BLOCK+1) %define EXT2_TIND_BLOCK (EXT2_DIND_BLOCK+1) %define EXT2_N_BLOCKS (EXT2_TIND_BLOCK+1) ; ; Structure definition for the ext2 superblock ; struc ext2_super_block s_inodes_count resd 1 ; Inodes count s_blocks_count resd 1 ; Blocks count s_r_blocks_count resd 1 ; Reserved blocks count s_free_blocks_count resd 1 ; Free blocks count s_free_inodes_count resd 1 ; Free inodes count s_first_data_block resd 1 ; First Data Block s_log_block_size resd 1 ; Block size s_log_frag_size resd 1 ; Fragment size s_blocks_per_group resd 1 ; # Blocks per group s_frags_per_group resd 1 ; # Fragments per group s_inodes_per_group resd 1 ; # Inodes per group s_mtime resd 1 ; Mount time s_wtime resd 1 ; Write time s_mnt_count resw 1 ; Mount count s_max_mnt_count resw 1 ; Maximal mount count s_magic resw 1 ; Magic signature s_state resw 1 ; File system state s_errors resw 1 ; Behaviour when detecting errors s_minor_rev_level resw 1 ; minor revision level s_lastcheck resd 1 ; time of last check s_checkinterval resd 1 ; max. time between checks s_creator_os resd 1 ; OS s_rev_level resd 1 ; Revision level s_def_resuid resw 1 ; Default uid for reserved blocks s_def_resgid resw 1 ; Default gid for reserved blocks s_first_ino resd 1 ; First non-reserved inode s_inode_size resw 1 ; size of inode structure s_block_group_nr resw 1 ; block group # of this superblock s_feature_compat resd 1 ; compatible feature set s_feature_incompat resd 1 ; incompatible feature set s_feature_ro_compat resd 1 ; readonly-compatible feature set s_uuid resb 16 ; 128-bit uuid for volume s_volume_name resb 16 ; volume name s_last_mounted resb 64 ; directory where last mounted s_algorithm_usage_bitmap resd 1 ; For compression s_prealloc_blocks resb 1 ; Nr of blocks to try to preallocate s_prealloc_dir_blocks resb 1 ; Nr to preallocate for dirs s_padding1 resw 1 s_reserved resd 204 ; Padding to the end of the block endstruc %ifndef DEPEND %if ext2_super_block_size != 1024 %error "ext2_super_block definition bogus" %endif %endif ; ; Structure definition for the ext2 inode ; struc ext2_inode i_mode resw 1 ; File mode i_uid resw 1 ; Owner Uid i_size resd 1 ; Size in bytes i_atime resd 1 ; Access time i_ctime resd 1 ; Creation time i_mtime resd 1 ; Modification time i_dtime resd 1 ; Deletion Time i_gid resw 1 ; Group Id i_links_count resw 1 ; Links count i_blocks resd 1 ; Blocks count i_flags resd 1 ; File flags l_i_reserved1 resd 1 i_block resd EXT2_N_BLOCKS ; Pointer to blocks i_version resd 1 ; File version (for NFS) i_file_acl resd 1 ; File ACL i_dir_acl resd 1 ; Directory ACL i_faddr resd 1 ; Fragment address l_i_frag resb 1 ; Fragment number l_i_fsize resb 1 ; Fragment size i_pad1 resw 1 l_i_reserved2 resd 2 endstruc %ifndef DEPEND %if ext2_inode_size != 128 %error "ext2_inode definition bogus" %endif %endif ; ; Structure definition for ext2 block group descriptor ; struc ext2_group_desc bg_block_bitmap resd 1 ; Block bitmap block bg_inode_bitmap resd 1 ; Inode bitmap block bg_inode_table resd 1 ; Inode table block bg_free_blocks_count resw 1 ; Free blocks count bg_free_inodes_count resw 1 ; Free inodes count bg_used_dirs_count resw 1 ; Used inodes count bg_pad resw 1 bg_reserved resd 3 endstruc %ifndef DEPEND %if ext2_group_desc_size != 32 %error "ext2_group_desc definition bogus" %endif %endif %define ext2_group_desc_lg2size 5 ; ; Structure definition for ext2 directory entry ; struc ext2_dir_entry d_inode resd 1 ; Inode number d_rec_len resw 1 ; Directory entry length d_name_len resb 1 ; Name length d_file_type resb 1 ; File type d_name equ $ endstruc