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|
; -----------------------------------------------------------------------
;
; Copyright 1998-2005 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)
;
; File types and file modes
;
%define S_IFDIR 0040000o ; Directory
%define S_IFCHR 0020000o ; Character device
%define S_IFBLK 0060000o ; Block device
%define S_IFREG 0100000o ; Regular file
%define S_IFIFO 0010000o ; FIFO
%define S_IFLNK 0120000o ; Symbolic link
%define S_IFSOCK 0140000o ; Socket
%define S_IFSHIFT 12
%define T_IFDIR (S_IFDIR >> S_IFSHIFT)
%define T_IFCHR (S_IFCHR >> S_IFSHIFT)
%define T_IFBLK (S_IFBLK >> S_IFSHIFT)
%define T_IFREG (S_IFREG >> S_IFSHIFT)
%define T_IFIFO (S_IFIFO >> S_IFSHIFT)
%define T_IFLNK (S_IFLNK >> S_IFSHIFT)
%define T_IFSOCK (S_IFSOCK >> S_IFSHIFT)
;
; 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
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