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/*
File: ext2grp.c
Copyright (C) 2008-2009 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 the Free Software Foundation, Inc., 51
Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdio.h>
#ifdef HAVE_STDLIB_H
#include <stdlib.h>
#endif
#include "types.h"
#include "common.h"
#include "list.h"
#include "filegen.h"
#include "dir.h"
#include "ext2grp.h"
#include "ext2_common.h"
#include "log.h"
#include "photorec.h"
unsigned int ext2_fix_group(alloc_data_t *list_search_space, disk_t *disk, const partition_t *partition)
{
struct td_list_head *search_walker = NULL;
unsigned char *buffer;
unsigned int blocksize;
if(partition->upart_type!=UP_EXT2 &&
partition->upart_type!=UP_EXT3 &&
partition->upart_type!=UP_EXT4)
{
log_error("Not a valid ext2/ext3/ext4 filesystem");
free_search_space(list_search_space);
return 0;
}
buffer=(unsigned char*)MALLOC(EXT2_SUPERBLOCK_SIZE);
if(disk->pread(disk, buffer, EXT2_SUPERBLOCK_SIZE, partition->part_offset + 0x400) != EXT2_SUPERBLOCK_SIZE)
{
free(buffer);
return 0;
}
{
const struct ext2_super_block *sb=(const struct ext2_super_block *)buffer;
const unsigned int mult=(unsigned int)le32(sb->s_blocks_per_group) * (EXT2_MIN_BLOCK_SIZE<<le32(sb->s_log_block_size));
td_list_for_each(search_walker, &list_search_space->list)
{
alloc_data_t *current_search_space;
current_search_space=td_list_entry(search_walker, alloc_data_t, list);
log_info("ext2_group: %llu\n", (long long unsigned)current_search_space->start);
current_search_space->start=current_search_space->start*mult + (le32(sb->s_log_block_size)==0?1024:0);
current_search_space->end=current_search_space->end*mult+mult-1 + (le32(sb->s_log_block_size)==0?1024:0);
}
blocksize=EXT2_MIN_BLOCK_SIZE<<le32(sb->s_log_block_size);
}
free(buffer);
return blocksize;
}
unsigned int ext2_fix_inode(alloc_data_t *list_search_space, disk_t *disk, const partition_t *partition)
{
struct td_list_head *search_walker = NULL;
unsigned char *buffer;
unsigned int blocksize;
if(partition->upart_type!=UP_EXT2 &&
partition->upart_type!=UP_EXT3 &&
partition->upart_type!=UP_EXT4)
{
log_error("Not a valid ext2/ext3/ext4 filesystem");
free_search_space(list_search_space);
return 0;
}
buffer=(unsigned char*)MALLOC(EXT2_SUPERBLOCK_SIZE);
if(disk->pread(disk, buffer, EXT2_SUPERBLOCK_SIZE, partition->part_offset + 0x400) != EXT2_SUPERBLOCK_SIZE)
{
free(buffer);
return 0;
}
{
const struct ext2_super_block *sb=(const struct ext2_super_block *)buffer;
const unsigned int divd=(unsigned int)le32(sb->s_inodes_per_group);
const unsigned int mult=(unsigned int)le32(sb->s_blocks_per_group) * (EXT2_MIN_BLOCK_SIZE<<le32(sb->s_log_block_size));
td_list_for_each(search_walker, &list_search_space->list)
{
alloc_data_t *current_search_space;
current_search_space=td_list_entry(search_walker, alloc_data_t, list);
log_info("ext2_inode: %llu\n", (long long unsigned)current_search_space->start);
current_search_space->start=current_search_space->start/divd*mult + (sb->s_log_block_size==0?1024:0);
current_search_space->end=current_search_space->end/divd*mult+mult-1 + (sb->s_log_block_size==0?1024:0);
}
blocksize=EXT2_MIN_BLOCK_SIZE<<le32(sb->s_log_block_size);
}
free(buffer);
return blocksize;
}
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