Humble beginnings of an extlinux program.syslinux-2.20-pre5

1 files changed, 130 insertions, 0 deletions

diff --git a/ext2_fs.inc b/ext2_fs.inc
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+; $Id$
+; -----------------------------------------------------------------------
+;   
+;   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_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
+
+%if ext2_super_block_size != 1024
+%error "ext2_super_block definition bogus"
+%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
+
+%if ext2_inode_size != 128
+%error "ext2_inode definition bogus"
+%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
+
+%if ext2_group_desc_size != 32
+%error "ext2_group_desc definition bogus"
+%endif
+
+%define ext2_group_desc_lg2size 5
+