ext2_fs.inc - pub/scm/boot/syslinux/syslinux - Git at Google

 ; -----------------------------------------------------------------------
 ;
 ;   Copyright 1998-2008 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
	; -----------------------------------------------------------------------
	;
	; Copyright 1998-2008 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