122 lines
3.3 KiB
C
122 lines
3.3 KiB
C
/*
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File: ext2p.c
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Copyright (C) 2007-2008 Christophe GRENIER <grenier@cgsecurity.org>
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This software 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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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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You should have received a copy of the GNU General Public License along
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with this program; if not, write the Free Software Foundation, Inc., 51
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Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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#if defined(DISABLED_FOR_FRAMAC)
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#undef HAVE_LIBEXT2FS
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#endif
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#if defined(HAVE_LIBEXT2FS)
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#include <stdio.h>
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#ifdef HAVE_STDLIB_H
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#include <stdlib.h>
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#endif
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#ifdef HAVE_STRING_H
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#include <string.h>
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#endif
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#include "types.h"
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#include "common.h"
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#include "list.h"
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#include "filegen.h"
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#include "photorec.h"
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#include "intrf.h"
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#include "dir.h"
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#ifdef HAVE_EXT2FS_EXT2_FS_H
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#include "ext2fs/ext2_fs.h"
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#endif
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#ifdef HAVE_EXT2FS_EXT2FS_H
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#include "ext2fs/ext2fs.h"
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#endif
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#include "ext2p.h"
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#include "ext2_inc.h"
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#include "ext2_dir.h"
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#include "log.h"
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#include "log_part.h"
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unsigned int ext2_remove_used_space(disk_t *disk, const partition_t *partition, alloc_data_t *list_search_space)
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{
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dir_data_t dir_data;
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switch(dir_partition_ext2_init(disk, partition, &dir_data, 0))
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{
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case DIR_PART_ENOIMP:
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case DIR_PART_ENOSYS:
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return 0;
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case DIR_PART_EIO:
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log_partition(disk, partition);
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log_error("Can't open filesystem. Filesystem seems damaged.\n");
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return 0;
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case DIR_PART_OK:
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break;
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}
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{
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struct ext2_dir_struct *ls=(struct ext2_dir_struct *)dir_data.private_dir_data;
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uint64_t start_free=0;
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uint64_t end_free=0;
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unsigned long int block;
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unsigned long int start,end;
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const unsigned int blocksize=ls->current_fs->blocksize;
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ext2fs_block_bitmap bitmap;
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if(ext2fs_read_block_bitmap(ls->current_fs))
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{
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log_error("ext2fs_read_block_bitmap failed\n");
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return 0;
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}
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bitmap=ls->current_fs->block_map;
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if(bitmap==NULL)
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return 0;
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#ifdef HAVE_EXT2FS_GET_GENERIC_BITMAP_START
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start=ext2fs_get_generic_bitmap_start(bitmap);
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end=ext2fs_get_generic_bitmap_end(bitmap);
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#else
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start=bitmap->start;
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end=bitmap->end;
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#endif
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log_trace("ext2_remove_used_space %lu-%lu\n", start, end);
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for(block=start;block<=end;block++)
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{
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#ifdef HAVE_EXT2FS_GET_GENERIC_BITMAP_START
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if(ext2fs_test_generic_bitmap(bitmap,block)!=0)
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#else
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if(ext2fs_test_bit(block - bitmap->start, bitmap->bitmap)!=0)
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#endif
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{
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/* Not free */
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if(end_free+1==partition->part_offset+(uint64_t)block*blocksize)
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end_free+=blocksize;
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else
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{
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if(start_free != end_free)
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del_search_space(list_search_space, start_free, end_free);
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start_free=partition->part_offset+(uint64_t)block*blocksize;
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end_free=start_free+(uint64_t)blocksize-1;
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}
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}
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}
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if(start_free != end_free)
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del_search_space(list_search_space, start_free, end_free);
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dir_data.close(&dir_data);
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return blocksize;
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}
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}
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#endif
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