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- /*
-
- File: ext2.h
-
- Copyright (C) 1998-2004 Christophe GRENIER <grenier@cgsecurity.org>
-
- This software 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; either version 2 of the License, or
- (at your option) any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
-
- */
- #define EXT2_SB(sb) (sb)
-
- /*
- * The second extended file system magic number
- */
- #define EXT2_SUPER_MAGIC 0xEF53
- #define EXT2_MIN_BLOCK_SIZE 1024
- #define EXT2_MAX_BLOCK_SIZE 4096
- #define EXT2_MIN_BLOCK_LOG_SIZE 10
-
- #define EXT2_MIN_BLOCK (EXT2_MIN_BLOCK_SIZE/SECTOR_SIZE)
-
- /*
- * File system states
- */
- #define EXT2_VALID_FS 0x0001 /* Unmounted cleanly */
- #define EXT2_ERROR_FS 0x0002 /* Errors detected */
-
- /*
- * Behaviour when detecting errors
- */
- #define EXT2_ERRORS_CONTINUE 1 /* Continue execution */
- #define EXT2_ERRORS_RO 2 /* Remount fs read-only */
- #define EXT2_ERRORS_PANIC 3 /* Panic */
- #define EXT2_ERRORS_DEFAULT EXT2_ERRORS_CONTINUE
-
- /*
- * Feature set definitions
- */
- #define EXT2_HAS_COMPAT_FEATURE(sb,mask) \
- ( le32(EXT2_SB(sb)->s_feature_compat) & (mask) )
- #define EXT2_HAS_RO_COMPAT_FEATURE(sb,mask) \
- ( le32(EXT2_SB(sb)->s_feature_ro_compat) & (mask) )
- #define EXT2_HAS_INCOMPAT_FEATURE(sb,mask) \
- ( le32(EXT2_SB(sb)->s_feature_incompat) & (mask) )
-
- #define EXT2_FEATURE_COMPAT_DIR_PREALLOC 0x0001
- #define EXT2_FEATURE_COMPAT_IMAGIC_INODES 0x0002
- #define EXT3_FEATURE_COMPAT_HAS_JOURNAL 0x0004
- #define EXT2_FEATURE_COMPAT_EXT_ATTR 0x0008
- #define EXT2_FEATURE_COMPAT_RESIZE_INO 0x0010
- #define EXT2_FEATURE_COMPAT_DIR_INDEX 0x0020
- #define EXT2_FEATURE_COMPAT_ANY 0xffffffff
-
-
- #define EXT2_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
- #define EXT2_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
- #define EXT2_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
- #define EXT2_FEATURE_RO_COMPAT_ANY 0xffffffff
-
- #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_ANY 0xffffffff
-
- /*
- * Structure of the super block
- */
- struct ext2_super_block {
- __u32 s_inodes_count; /* Inodes count */
- __u32 s_blocks_count; /* Blocks count */
- __u32 s_r_blocks_count; /* Reserved blocks count */
- __u32 s_free_blocks_count; /* Free blocks count */
- __u32 s_free_inodes_count; /* Free inodes count */
- __u32 s_first_data_block; /* First Data Block */
- __u32 s_log_block_size; /* Block size */
- __s32 s_log_frag_size; /* Fragment size */
- __u32 s_blocks_per_group; /* # Blocks per group */
- __u32 s_frags_per_group; /* # Fragments per group */
- __u32 s_inodes_per_group; /* # Inodes per group */
- __u32 s_mtime; /* Mount time */
- __u32 s_wtime; /* Write time */
- __u16 s_mnt_count; /* Mount count */
- __s16 s_max_mnt_count; /* Maximal mount count */
- __u16 s_magic; /* Magic signature */
- __u16 s_state; /* File system state */
- __u16 s_errors; /* Behaviour when detecting errors */
- __u16 s_minor_rev_level; /* minor revision level */
- __u32 s_lastcheck; /* time of last check */
- __u32 s_checkinterval; /* max. time between checks */
- __u32 s_creator_os; /* OS */
- __u32 s_rev_level; /* Revision level */
- __u16 s_def_resuid; /* Default uid for reserved blocks */
- __u16 s_def_resgid; /* Default gid for reserved blocks */
- /*
- * These fields are for EXT2_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 */
- __u32 s_feature_incompat; /* incompatible feature set */
- __u32 s_feature_ro_compat; /* readonly-compatible feature set */
- __u8 s_uuid[16]; /* 128-bit uuid for volume */
- char s_volume_name[16]; /* volume name */
- char s_last_mounted[64]; /* directory where last mounted */
- __u32 s_algorithm_usage_bitmap; /* For compression */
- /*
- * Performance hints. Directory preallocation should only
- * happen if the EXT2_COMPAT_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;
- __u32 s_reserved[204]; /* Padding to the end of the block */
- };
- int check_EXT2(t_param_disk *disk_car,t_diskext *partition,const int debug);
- int recover_EXT2(t_param_disk *disk_car, const struct ext2_super_block *sb,t_diskext *partition,const int debug, const int dump_ind);
- int set_EXT2_info(t_param_disk *disk_car, const struct ext2_super_block *sb,t_diskext *partition,const int debug, const int dump_ind);
-