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697 lines
23 KiB
C
697 lines
23 KiB
C
/*
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* FreeLoader
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* Copyright (C) 1998-2002 Brian Palmer <brianp@sginet.com>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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*/
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#ifndef __EXT2_H
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#define __EXT2_H
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/*
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* linux/include/linux/ext3_fs.h
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*
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* Copyright (C) 1992, 1993, 1994, 1995
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* Remy Card (card@masi.ibp.fr)
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* Laboratoire MASI - Institut Blaise Pascal
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* Universite Pierre et Marie Curie (Paris VI)
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*
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* from
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*
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* linux/include/linux/minix_fs.h
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*
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* Copyright (C) 1991, 1992 Linus Torvalds
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*/
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#ifndef _LINUX_EXT3_FS_H
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#define _LINUX_EXT3_FS_H
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//#include <linux/types.h>
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/*
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* The second extended filesystem constants/structures
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*/
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/*
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* Define EXT3FS_DEBUG to produce debug messages
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*/
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#undef EXT3FS_DEBUG
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/*
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* Define EXT3_PREALLOCATE to preallocate data blocks for expanding files
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*/
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#undef EXT3_PREALLOCATE /* @@@ Fix this! */
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#define EXT3_DEFAULT_PREALLOC_BLOCKS 8
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/*
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* The second extended file system version
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*/
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#define EXT3FS_DATE "10 Jan 2002"
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#define EXT3FS_VERSION "2.4-0.9.17"
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/*
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* Debug code
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*/
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#ifdef EXT3FS_DEBUG
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#define ext3_debug(f, a...) \
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do { \
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printk (KERN_DEBUG "EXT3-fs DEBUG (%s, %d): %s:", \
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__FILE__, __LINE__, __FUNCTION__); \
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printk (KERN_DEBUG f, ## a); \
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} while (0)
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#else
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#define ext3_debug(f, a...) do {} while (0)
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#endif
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/*
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* Special inodes numbers
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*/
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#define EXT3_BAD_INO 1 /* Bad blocks inode */
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#define EXT3_ROOT_INO 2 /* Root inode */
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#define EXT3_ACL_IDX_INO 3 /* ACL inode */
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#define EXT3_ACL_DATA_INO 4 /* ACL inode */
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#define EXT3_BOOT_LOADER_INO 5 /* Boot loader inode */
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#define EXT3_UNDEL_DIR_INO 6 /* Undelete directory inode */
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#define EXT3_RESIZE_INO 7 /* Reserved group descriptors inode */
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#define EXT3_JOURNAL_INO 8 /* Journal inode */
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/* First non-reserved inode for old ext3 filesystems */
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#define EXT3_GOOD_OLD_FIRST_INO 11
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/*
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* The second extended file system magic number
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*/
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#define EXT3_SUPER_MAGIC 0xEF53
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/*
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* Maximal count of links to a file
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*/
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#define EXT3_LINK_MAX 32000
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/*
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* Macro-instructions used to manage several block sizes
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*/
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#define EXT3_MIN_BLOCK_SIZE 1024
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#define EXT3_MAX_BLOCK_SIZE 4096
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#define EXT3_MIN_BLOCK_LOG_SIZE 10
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#ifdef __KERNEL__
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# define EXT3_BLOCK_SIZE(s) ((s)->s_blocksize)
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#else
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# define EXT3_BLOCK_SIZE(s) (EXT3_MIN_BLOCK_SIZE << (s)->s_log_block_size)
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#endif
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#define EXT3_ACLE_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_acl_entry))
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#define EXT3_ADDR_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (__u32))
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#ifdef __KERNEL__
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# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_blocksize_bits)
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#else
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# define EXT3_BLOCK_SIZE_BITS(s) ((s)->s_log_block_size + 10)
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#endif
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#ifdef __KERNEL__
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#define EXT3_ADDR_PER_BLOCK_BITS(s) ((s)->u.ext3_sb.s_addr_per_block_bits)
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#define EXT3_INODE_SIZE(s) ((s)->u.ext3_sb.s_inode_size)
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#define EXT3_FIRST_INO(s) ((s)->u.ext3_sb.s_first_ino)
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#else
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#define EXT3_INODE_SIZE(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
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EXT3_GOOD_OLD_INODE_SIZE : \
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(s)->s_inode_size)
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#define EXT3_FIRST_INO(s) (((s)->s_rev_level == EXT3_GOOD_OLD_REV) ? \
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EXT3_GOOD_OLD_FIRST_INO : \
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(s)->s_first_ino)
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#endif
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/*
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* Macro-instructions used to manage fragments
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*/
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#define EXT3_MIN_FRAG_SIZE 1024
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#define EXT3_MAX_FRAG_SIZE 4096
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#define EXT3_MIN_FRAG_LOG_SIZE 10
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#ifdef __KERNEL__
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# define EXT3_FRAG_SIZE(s) ((s)->u.ext3_sb.s_frag_size)
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# define EXT3_FRAGS_PER_BLOCK(s) ((s)->u.ext3_sb.s_frags_per_block)
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#else
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# define EXT3_FRAG_SIZE(s) (EXT3_MIN_FRAG_SIZE << (s)->s_log_frag_size)
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# define EXT3_FRAGS_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / EXT3_FRAG_SIZE(s))
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#endif
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/*
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* ACL structures
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*/
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struct ext3_acl_header /* Header of Access Control Lists */
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{
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__u32 aclh_size;
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__u32 aclh_file_count;
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__u32 aclh_acle_count;
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__u32 aclh_first_acle;
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};
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struct ext3_acl_entry /* Access Control List Entry */
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{
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__u32 acle_size;
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__u16 acle_perms; /* Access permissions */
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__u16 acle_type; /* Type of entry */
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__u16 acle_tag; /* User or group identity */
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__u16 acle_pad1;
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__u32 acle_next; /* Pointer on next entry for the */
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/* same inode or on next free entry */
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};
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/*
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* Structure of a blocks group descriptor
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*/
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struct ext3_group_desc
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{
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__u32 bg_block_bitmap; /* Blocks bitmap block */
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__u32 bg_inode_bitmap; /* Inodes bitmap block */
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__u32 bg_inode_table; /* Inodes table block */
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__u16 bg_free_blocks_count; /* Free blocks count */
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__u16 bg_free_inodes_count; /* Free inodes count */
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__u16 bg_used_dirs_count; /* Directories count */
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__u16 bg_pad;
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__u32 bg_reserved[3];
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};
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/*
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* Macro-instructions used to manage group descriptors
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*/
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#ifdef __KERNEL__
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# define EXT3_BLOCKS_PER_GROUP(s) ((s)->u.ext3_sb.s_blocks_per_group)
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# define EXT3_DESC_PER_BLOCK(s) ((s)->u.ext3_sb.s_desc_per_block)
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# define EXT3_INODES_PER_GROUP(s) ((s)->u.ext3_sb.s_inodes_per_group)
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# define EXT3_DESC_PER_BLOCK_BITS(s) ((s)->u.ext3_sb.s_desc_per_block_bits)
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#else
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# define EXT3_BLOCKS_PER_GROUP(s) ((s)->s_blocks_per_group)
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# define EXT3_DESC_PER_BLOCK(s) (EXT3_BLOCK_SIZE(s) / sizeof (struct ext3_group_desc))
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# define EXT3_INODES_PER_GROUP(s) ((s)->s_inodes_per_group)
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#endif
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/*
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* Constants relative to the data blocks
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*/
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#define EXT3_NDIR_BLOCKS 12
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#define EXT3_IND_BLOCK EXT3_NDIR_BLOCKS
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#define EXT3_DIND_BLOCK (EXT3_IND_BLOCK + 1)
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#define EXT3_TIND_BLOCK (EXT3_DIND_BLOCK + 1)
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#define EXT3_N_BLOCKS (EXT3_TIND_BLOCK + 1)
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/*
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* Inode flags
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*/
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#define EXT3_SECRM_FL 0x00000001 /* Secure deletion */
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#define EXT3_UNRM_FL 0x00000002 /* Undelete */
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#define EXT3_COMPR_FL 0x00000004 /* Compress file */
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#define EXT3_SYNC_FL 0x00000008 /* Synchronous updates */
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#define EXT3_IMMUTABLE_FL 0x00000010 /* Immutable file */
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#define EXT3_APPEND_FL 0x00000020 /* writes to file may only append */
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#define EXT3_NODUMP_FL 0x00000040 /* do not dump file */
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#define EXT3_NOATIME_FL 0x00000080 /* do not update atime */
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/* Reserved for compression usage... */
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#define EXT3_DIRTY_FL 0x00000100
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#define EXT3_COMPRBLK_FL 0x00000200 /* One or more compressed clusters */
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#define EXT3_NOCOMPR_FL 0x00000400 /* Don't compress */
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#define EXT3_ECOMPR_FL 0x00000800 /* Compression error */
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/* End compression flags --- maybe not all used */
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#define EXT3_INDEX_FL 0x00001000 /* hash-indexed directory */
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#define EXT3_IMAGIC_FL 0x00002000 /* AFS directory */
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#define EXT3_JOURNAL_DATA_FL 0x00004000 /* file data should be journaled */
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#define EXT3_RESERVED_FL 0x80000000 /* reserved for ext3 lib */
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#define EXT3_FL_USER_VISIBLE 0x00005FFF /* User visible flags */
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#define EXT3_FL_USER_MODIFIABLE 0x000000FF /* User modifiable flags */
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/*
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* Inode dynamic state flags
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*/
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#define EXT3_STATE_JDATA 0x00000001 /* journaled data exists */
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#define EXT3_STATE_NEW 0x00000002 /* inode is newly created */
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/*
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* ioctl commands
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*/
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#define EXT3_IOC_GETFLAGS _IOR('f', 1, long)
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#define EXT3_IOC_SETFLAGS _IOW('f', 2, long)
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#define EXT3_IOC_GETVERSION _IOR('f', 3, long)
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#define EXT3_IOC_SETVERSION _IOW('f', 4, long)
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#define EXT3_IOC_GETVERSION_OLD _IOR('v', 1, long)
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#define EXT3_IOC_SETVERSION_OLD _IOW('v', 2, long)
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#ifdef CONFIG_JBD_DEBUG
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#define EXT3_IOC_WAIT_FOR_READONLY _IOR('f', 99, long)
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#endif
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/*
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* Structure of an inode on the disk
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*/
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struct ext3_inode {
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__u16 i_mode; /* File mode */
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__u16 i_uid; /* Low 16 bits of Owner Uid */
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__u32 i_size; /* Size in bytes */
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__u32 i_atime; /* Access time */
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__u32 i_ctime; /* Creation time */
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__u32 i_mtime; /* Modification time */
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__u32 i_dtime; /* Deletion Time */
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__u16 i_gid; /* Low 16 bits of Group Id */
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__u16 i_links_count; /* Links count */
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__u32 i_blocks; /* Blocks count */
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__u32 i_flags; /* File flags */
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union {
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struct {
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__u32 l_i_reserved1;
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} linux1;
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struct {
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__u32 h_i_translator;
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} hurd1;
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struct {
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__u32 m_i_reserved1;
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} masix1;
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} osd1; /* OS dependent 1 */
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__u32 i_block[EXT3_N_BLOCKS];/* Pointers to blocks */
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__u32 i_generation; /* File version (for NFS) */
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__u32 i_file_acl; /* File ACL */
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__u32 i_dir_acl; /* Directory ACL */
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__u32 i_faddr; /* Fragment address */
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union {
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struct {
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__u8 l_i_frag; /* Fragment number */
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__u8 l_i_fsize; /* Fragment size */
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__u16 i_pad1;
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__u16 l_i_uid_high; /* these 2 fields */
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__u16 l_i_gid_high; /* were reserved2[0] */
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__u32 l_i_reserved2;
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} linux2;
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struct {
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__u8 h_i_frag; /* Fragment number */
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__u8 h_i_fsize; /* Fragment size */
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__u16 h_i_mode_high;
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__u16 h_i_uid_high;
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__u16 h_i_gid_high;
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__u32 h_i_author;
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} hurd2;
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struct {
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__u8 m_i_frag; /* Fragment number */
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__u8 m_i_fsize; /* Fragment size */
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__u16 m_pad1;
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__u32 m_i_reserved2[2];
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} masix2;
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} osd2; /* OS dependent 2 */
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};
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#define i_size_high i_dir_acl
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#if defined(__KERNEL__) || defined(__linux__)
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#define i_reserved1 osd1.linux1.l_i_reserved1
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#define i_frag osd2.linux2.l_i_frag
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#define i_fsize osd2.linux2.l_i_fsize
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#define i_uid_low i_uid
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#define i_gid_low i_gid
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#define i_uid_high osd2.linux2.l_i_uid_high
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#define i_gid_high osd2.linux2.l_i_gid_high
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#define i_reserved2 osd2.linux2.l_i_reserved2
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#elif defined(__GNU__)
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#define i_translator osd1.hurd1.h_i_translator
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#define i_frag osd2.hurd2.h_i_frag;
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#define i_fsize osd2.hurd2.h_i_fsize;
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#define i_uid_high osd2.hurd2.h_i_uid_high
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#define i_gid_high osd2.hurd2.h_i_gid_high
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#define i_author osd2.hurd2.h_i_author
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#elif defined(__masix__)
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#define i_reserved1 osd1.masix1.m_i_reserved1
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#define i_frag osd2.masix2.m_i_frag
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#define i_fsize osd2.masix2.m_i_fsize
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#define i_reserved2 osd2.masix2.m_i_reserved2
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#endif /* defined(__KERNEL__) || defined(__linux__) */
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/*
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* File system states
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*/
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#define EXT3_VALID_FS 0x0001 /* Unmounted cleanly */
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#define EXT3_ERROR_FS 0x0002 /* Errors detected */
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#define EXT3_ORPHAN_FS 0x0004 /* Orphans being recovered */
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/*
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* Mount flags
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*/
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#define EXT3_MOUNT_CHECK 0x0001 /* Do mount-time checks */
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#define EXT3_MOUNT_GRPID 0x0004 /* Create files with directory's group */
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#define EXT3_MOUNT_DEBUG 0x0008 /* Some debugging messages */
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#define EXT3_MOUNT_ERRORS_CONT 0x0010 /* Continue on errors */
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#define EXT3_MOUNT_ERRORS_RO 0x0020 /* Remount fs ro on errors */
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#define EXT3_MOUNT_ERRORS_PANIC 0x0040 /* Panic on errors */
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#define EXT3_MOUNT_MINIX_DF 0x0080 /* Mimics the Minix statfs */
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#define EXT3_MOUNT_NOLOAD 0x0100 /* Don't use existing journal*/
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#define EXT3_MOUNT_ABORT 0x0200 /* Fatal error detected */
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#define EXT3_MOUNT_DATA_FLAGS 0x0C00 /* Mode for data writes: */
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#define EXT3_MOUNT_JOURNAL_DATA 0x0400 /* Write data to journal */
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#define EXT3_MOUNT_ORDERED_DATA 0x0800 /* Flush data before commit */
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#define EXT3_MOUNT_WRITEBACK_DATA 0x0C00 /* No data ordering */
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#define EXT3_MOUNT_UPDATE_JOURNAL 0x1000 /* Update the journal format */
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#define EXT3_MOUNT_NO_UID32 0x2000 /* Disable 32-bit UIDs */
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/* Compatibility, for having both ext2_fs.h and ext3_fs.h included at once */
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#ifndef _LINUX_EXT2_FS_H
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#define clear_opt(o, opt) o &= ~EXT3_MOUNT_##opt
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#define set_opt(o, opt) o |= EXT3_MOUNT_##opt
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#define test_opt(sb, opt) ((sb)->u.ext3_sb.s_mount_opt & \
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EXT3_MOUNT_##opt)
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#else
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#define EXT2_MOUNT_NOLOAD EXT3_MOUNT_NOLOAD
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#define EXT2_MOUNT_ABORT EXT3_MOUNT_ABORT
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#endif
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#define ext3_set_bit ext2_set_bit
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#define ext3_clear_bit ext2_clear_bit
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#define ext3_test_bit ext2_test_bit
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#define ext3_find_first_zero_bit ext2_find_first_zero_bit
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#define ext3_find_next_zero_bit ext2_find_next_zero_bit
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/*
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* Maximal mount counts between two filesystem checks
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*/
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#define EXT3_DFL_MAX_MNT_COUNT 20 /* Allow 20 mounts */
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#define EXT3_DFL_CHECKINTERVAL 0 /* Don't use interval check */
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/*
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* Behaviour when detecting errors
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*/
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#define EXT3_ERRORS_CONTINUE 1 /* Continue execution */
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#define EXT3_ERRORS_RO 2 /* Remount fs read-only */
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#define EXT3_ERRORS_PANIC 3 /* Panic */
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#define EXT3_ERRORS_DEFAULT EXT3_ERRORS_CONTINUE
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/*
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* Structure of the super block
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*/
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struct ext3_super_block {
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/*00*/ __u32 s_inodes_count; /* Inodes count */
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__u32 s_blocks_count; /* Blocks count */
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__u32 s_r_blocks_count; /* Reserved blocks count */
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__u32 s_free_blocks_count; /* Free blocks count */
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/*10*/ __u32 s_free_inodes_count; /* Free inodes count */
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__u32 s_first_data_block; /* First Data Block */
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__u32 s_log_block_size; /* Block size */
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__s32 s_log_frag_size; /* Fragment size */
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/*20*/ __u32 s_blocks_per_group; /* # Blocks per group */
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__u32 s_frags_per_group; /* # Fragments per group */
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__u32 s_inodes_per_group; /* # Inodes per group */
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__u32 s_mtime; /* Mount time */
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/*30*/ __u32 s_wtime; /* Write time */
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__u16 s_mnt_count; /* Mount count */
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__s16 s_max_mnt_count; /* Maximal mount count */
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__u16 s_magic; /* Magic signature */
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__u16 s_state; /* File system state */
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__u16 s_errors; /* Behaviour when detecting errors */
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__u16 s_minor_rev_level; /* minor revision level */
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/*40*/ __u32 s_lastcheck; /* time of last check */
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__u32 s_checkinterval; /* max. time between checks */
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__u32 s_creator_os; /* OS */
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__u32 s_rev_level; /* Revision level */
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/*50*/ __u16 s_def_resuid; /* Default uid for reserved blocks */
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__u16 s_def_resgid; /* Default gid for reserved blocks */
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/*
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* These fields are for EXT3_DYNAMIC_REV superblocks only.
|
|
*
|
|
* Note: the difference between the compatible feature set and
|
|
* the incompatible feature set is that if there is a bit set
|
|
* in the incompatible feature set that the kernel doesn't
|
|
* know about, it should refuse to mount the filesystem.
|
|
*
|
|
* e2fsck's requirements are more strict; if it doesn't know
|
|
* about a feature in either the compatible or incompatible
|
|
* feature set, it must abort and not try to meddle with
|
|
* things it doesn't understand...
|
|
*/
|
|
__u32 s_first_ino; /* First non-reserved inode */
|
|
__u16 s_inode_size; /* size of inode structure */
|
|
__u16 s_block_group_nr; /* block group # of this superblock */
|
|
__u32 s_feature_compat; /* compatible feature set */
|
|
/*60*/ __u32 s_feature_incompat; /* incompatible feature set */
|
|
__u32 s_feature_ro_compat; /* readonly-compatible feature set */
|
|
/*68*/ __u8 s_uuid[16]; /* 128-bit uuid for volume */
|
|
/*78*/ char s_volume_name[16]; /* volume name */
|
|
/*88*/ char s_last_mounted[64]; /* directory where last mounted */
|
|
/*C8*/ __u32 s_algorithm_usage_bitmap; /* For compression */
|
|
/*
|
|
* Performance hints. Directory preallocation should only
|
|
* happen if the EXT3_FEATURE_COMPAT_DIR_PREALLOC flag is on.
|
|
*/
|
|
__u8 s_prealloc_blocks; /* Nr of blocks to try to preallocate*/
|
|
__u8 s_prealloc_dir_blocks; /* Nr to preallocate for dirs */
|
|
__u16 s_padding1;
|
|
/*
|
|
* Journaling support valid if EXT3_FEATURE_COMPAT_HAS_JOURNAL set.
|
|
*/
|
|
/*D0*/ __u8 s_journal_uuid[16]; /* uuid of journal superblock */
|
|
/*E0*/ __u32 s_journal_inum; /* inode number of journal file */
|
|
__u32 s_journal_dev; /* device number of journal file */
|
|
__u32 s_last_orphan; /* start of list of inodes to delete */
|
|
|
|
/*EC*/ __u32 s_reserved[197]; /* Padding to the end of the block */
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
#define EXT3_SB(sb) (&((sb)->u.ext3_sb))
|
|
#define EXT3_I(inode) (&((inode)->u.ext3_i))
|
|
#else
|
|
/* Assume that user mode programs are passing in an ext3fs superblock, not
|
|
* a kernel struct super_block. This will allow us to call the feature-test
|
|
* macros from user land. */
|
|
#define EXT3_SB(sb) (sb)
|
|
#endif
|
|
|
|
#define NEXT_ORPHAN(inode) (inode)->u.ext3_i.i_dtime
|
|
|
|
/*
|
|
* Codes for operating systems
|
|
*/
|
|
#define EXT3_OS_LINUX 0
|
|
#define EXT3_OS_HURD 1
|
|
#define EXT3_OS_MASIX 2
|
|
#define EXT3_OS_FREEBSD 3
|
|
#define EXT3_OS_LITES 4
|
|
|
|
/*
|
|
* Revision levels
|
|
*/
|
|
#define EXT3_GOOD_OLD_REV 0 /* The good old (original) format */
|
|
#define EXT3_DYNAMIC_REV 1 /* V2 format w/ dynamic inode sizes */
|
|
|
|
#define EXT3_CURRENT_REV EXT3_GOOD_OLD_REV
|
|
#define EXT3_MAX_SUPP_REV EXT3_DYNAMIC_REV
|
|
|
|
#define EXT3_GOOD_OLD_INODE_SIZE 128
|
|
|
|
/*
|
|
* Feature set definitions
|
|
*/
|
|
|
|
#define EXT3_HAS_COMPAT_FEATURE(sb,mask) \
|
|
( EXT3_SB(sb)->s_es->s_feature_compat & cpu_to_le32(mask) )
|
|
#define EXT3_HAS_RO_COMPAT_FEATURE(sb,mask) \
|
|
( EXT3_SB(sb)->s_es->s_feature_ro_compat & cpu_to_le32(mask) )
|
|
#define EXT3_HAS_INCOMPAT_FEATURE(sb,mask) \
|
|
( EXT3_SB(sb)->s_es->s_feature_incompat & cpu_to_le32(mask) )
|
|
#define EXT3_SET_COMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_compat |= cpu_to_le32(mask)
|
|
#define EXT3_SET_RO_COMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_ro_compat |= cpu_to_le32(mask)
|
|
#define EXT3_SET_INCOMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_incompat |= cpu_to_le32(mask)
|
|
#define EXT3_CLEAR_COMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_compat &= ~cpu_to_le32(mask)
|
|
#define EXT3_CLEAR_RO_COMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_ro_compat &= ~cpu_to_le32(mask)
|
|
#define EXT3_CLEAR_INCOMPAT_FEATURE(sb,mask) \
|
|
EXT3_SB(sb)->s_es->s_feature_incompat &= ~cpu_to_le32(mask)
|
|
|
|
#define EXT3_FEATURE_COMPAT_DIR_PREALLOC 0x0001
|
|
#define EXT3_FEATURE_COMPAT_IMAGIC_INODES 0x0002
|
|
#define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
|
|
#define EXT3_FEATURE_COMPAT_EXT_ATTR 0x0008
|
|
#define EXT3_FEATURE_COMPAT_RESIZE_INODE 0x0010
|
|
#define EXT3_FEATURE_COMPAT_DIR_INDEX 0x0020
|
|
|
|
#define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
|
|
#define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
|
|
#define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
|
|
|
|
#define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
|
|
#define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
|
|
#define EXT3_FEATURE_INCOMPAT_RECOVER 0x0004 /* Needs recovery */
|
|
#define EXT3_FEATURE_INCOMPAT_JOURNAL_DEV 0x0008 /* Journal device */
|
|
|
|
#define EXT3_FEATURE_COMPAT_SUPP 0
|
|
/*#define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE| \
|
|
EXT3_FEATURE_INCOMPAT_RECOVER)*/
|
|
#define EXT3_FEATURE_INCOMPAT_SUPP (EXT3_FEATURE_INCOMPAT_FILETYPE)
|
|
#define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
|
|
EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
|
|
EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
|
|
|
|
/*
|
|
* Default values for user and/or group using reserved blocks
|
|
*/
|
|
#define EXT3_DEF_RESUID 0
|
|
#define EXT3_DEF_RESGID 0
|
|
|
|
/*
|
|
* Structure of a directory entry
|
|
*/
|
|
#define EXT3_NAME_LEN 255
|
|
|
|
struct ext3_dir_entry {
|
|
__u32 inode; /* Inode number */
|
|
__u16 rec_len; /* Directory entry length */
|
|
__u16 name_len; /* Name length */
|
|
char name[EXT3_NAME_LEN]; /* File name */
|
|
};
|
|
|
|
/*
|
|
* The new version of the directory entry. Since EXT3 structures are
|
|
* stored in intel byte order, and the name_len field could never be
|
|
* bigger than 255 chars, it's safe to reclaim the extra byte for the
|
|
* file_type field.
|
|
*/
|
|
struct ext3_dir_entry_2 {
|
|
__u32 inode; /* Inode number */
|
|
__u16 rec_len; /* Directory entry length */
|
|
__u8 name_len; /* Name length */
|
|
__u8 file_type;
|
|
char name[EXT3_NAME_LEN]; /* File name */
|
|
};
|
|
|
|
/*
|
|
* Ext3 directory file types. Only the low 3 bits are used. The
|
|
* other bits are reserved for now.
|
|
*/
|
|
#define EXT3_FT_UNKNOWN 0
|
|
#define EXT3_FT_REG_FILE 1
|
|
#define EXT3_FT_DIR 2
|
|
#define EXT3_FT_CHRDEV 3
|
|
#define EXT3_FT_BLKDEV 4
|
|
#define EXT3_FT_FIFO 5
|
|
#define EXT3_FT_SOCK 6
|
|
#define EXT3_FT_SYMLINK 7
|
|
|
|
#define EXT3_FT_MAX 8
|
|
|
|
/*
|
|
* EXT3_DIR_PAD defines the directory entries boundaries
|
|
*
|
|
* NOTE: It must be a multiple of 4
|
|
*/
|
|
#define EXT3_DIR_PAD 4
|
|
#define EXT3_DIR_ROUND (EXT3_DIR_PAD - 1)
|
|
#define EXT3_DIR_REC_LEN(name_len) (((name_len) + 8 + EXT3_DIR_ROUND) & \
|
|
~EXT3_DIR_ROUND)
|
|
|
|
#ifdef __KERNEL__
|
|
/*
|
|
* Describe an inode's exact location on disk and in memory
|
|
*/
|
|
struct ext3_iloc
|
|
{
|
|
struct buffer_head *bh;
|
|
struct ext3_inode *raw_inode;
|
|
unsigned long block_group;
|
|
};
|
|
|
|
|
|
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _LINUX_EXT3_FS_H */
|
|
|
|
|
|
|
|
typedef struct ext3_super_block EXT2_SUPER_BLOCK, *PEXT2_SUPER_BLOCK;
|
|
typedef struct ext3_inode EXT2_INODE, *PEXT2_INODE;
|
|
typedef struct ext3_group_desc EXT2_GROUP_DESC, *PEXT2_GROUP_DESC;
|
|
typedef struct ext3_dir_entry_2 EXT2_DIR_ENTRY, *PEXT2_DIR_ENTRY;
|
|
|
|
// EXT2_INODE::i_mode values
|
|
#define EXT2_S_IRWXO 0x0007 // Other mask
|
|
#define EXT2_S_IXOTH 0x0001 // ---------x execute
|
|
#define EXT2_S_IWOTH 0x0002 // --------w- write
|
|
#define EXT2_S_IROTH 0x0004 // -------r-- read
|
|
|
|
#define EXT2_S_IRWXG 0x0038 // Group mask
|
|
#define EXT2_S_IXGRP 0x0008 // ------x--- execute
|
|
#define EXT2_S_IWGRP 0x0010 // -----w---- write
|
|
#define EXT2_S_IRGRP 0x0020 // ----r----- read
|
|
|
|
#define EXT2_S_IRWXU 0x01C0 // User mask
|
|
#define EXT2_S_IXUSR 0x0040 // ---x------ execute
|
|
#define EXT2_S_IWUSR 0x0080 // --w------- write
|
|
#define EXT2_S_IRUSR 0x0100 // -r-------- read
|
|
|
|
#define EXT2_S_ISVTX 0x0200 // Sticky bit
|
|
#define EXT2_S_ISGID 0x0400 // SGID
|
|
#define EXT2_S_ISUID 0x0800 // SUID
|
|
|
|
#define EXT2_S_IFMT 0xF000 // Format mask
|
|
#define EXT2_S_IFIFO 0x1000 // FIFO buffer
|
|
#define EXT2_S_IFCHR 0x2000 // Character device
|
|
#define EXT2_S_IFDIR 0x4000 // Directory
|
|
#define EXT2_S_IFBLK 0x6000 // Block device
|
|
#define EXT2_S_IFREG 0x8000 // Regular file
|
|
#define EXT2_S_IFLNK 0xA000 // Symbolic link
|
|
#define EXT2_S_IFSOCK 0xC000 // Socket
|
|
|
|
#define FAST_SYMLINK_MAX_NAME_SIZE 60
|
|
|
|
typedef struct
|
|
{
|
|
U64 FileSize; // File size
|
|
U64 FilePointer; // File pointer
|
|
U32* FileBlockList; // File block list
|
|
U8 DriveNumber; // Drive number of open file
|
|
EXT2_INODE Inode; // File's inode
|
|
} EXT2_FILE_INFO, * PEXT2_FILE_INFO;
|
|
|
|
|
|
|
|
BOOL Ext2OpenVolume(U8 DriveNumber, U64 VolumeStartSector);
|
|
FILE* Ext2OpenFile(PUCHAR FileName);
|
|
BOOL Ext2LookupFile(PUCHAR FileName, PEXT2_FILE_INFO Ext2FileInfoPointer);
|
|
BOOL Ext2SearchDirectoryBufferForFile(PVOID DirectoryBuffer, U32 DirectorySize, PUCHAR FileName, PEXT2_DIR_ENTRY DirectoryEntry);
|
|
BOOL Ext2ReadFile(FILE *FileHandle, U64 BytesToRead, U64* BytesRead, PVOID Buffer);
|
|
U64 Ext2GetFileSize(FILE *FileHandle);
|
|
VOID Ext2SetFilePointer(FILE *FileHandle, U64 NewFilePointer);
|
|
U64 Ext2GetFilePointer(FILE *FileHandle);
|
|
BOOL Ext2ReadVolumeSectors(U8 DriveNumber, U64 SectorNumber, U64 SectorCount, PVOID Buffer);
|
|
|
|
BOOL Ext2ReadSuperBlock(VOID);
|
|
BOOL Ext2ReadGroupDescriptors(VOID);
|
|
BOOL Ext2ReadDirectory(U32 Inode, PVOID* DirectoryBuffer, PEXT2_INODE InodePointer);
|
|
BOOL Ext2ReadBlock(U32 BlockNumber, PVOID Buffer);
|
|
BOOL Ext2ReadPartialBlock(U32 BlockNumber, U32 StartingOffset, U32 Length, PVOID Buffer);
|
|
U32 Ext2GetGroupDescBlockNumber(U32 Group);
|
|
U32 Ext2GetGroupDescOffsetInBlock(U32 Group);
|
|
U32 Ext2GetInodeGroupNumber(U32 Inode);
|
|
U32 Ext2GetInodeBlockNumber(U32 Inode);
|
|
U32 Ext2GetInodeOffsetInBlock(U32 Inode);
|
|
BOOL Ext2ReadInode(U32 Inode, PEXT2_INODE InodeBuffer);
|
|
BOOL Ext2ReadGroupDescriptor(U32 Group, PEXT2_GROUP_DESC GroupBuffer);
|
|
U32* Ext2ReadBlockPointerList(PEXT2_INODE Inode);
|
|
U64 Ext2GetInodeFileSize(PEXT2_INODE Inode);
|
|
BOOL Ext2CopyIndirectBlockPointers(U32 IndirectBlock, U32 BlockCount, U32* BlockList);
|
|
BOOL Ext2CopyDoubleIndirectBlockPointers(U32 DoubleIndirectBlock, U32 BlockCount, U32* BlockList);
|
|
BOOL Ext2CopyTripleIndirectBlockPointers(U32 TripleIndirectBlock, U32 BlockCount, U32* BlockList);
|
|
|
|
#endif // #defined __EXT2_H
|