2007-10-29 22:38:52 +01:00
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/*
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File: swap.c
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2008-11-10 08:12:15 +01:00
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Copyright (C) 1998-2006,2008 Christophe GRENIER <grenier@cgsecurity.org>
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2007-10-29 22:38:52 +01:00
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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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#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 <stdio.h>
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#include "types.h"
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#include "common.h"
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#include "swap.h"
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static int set_Linux_SWAP_info(const union swap_header *swap_header,partition_t *partition);
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2009-02-03 09:29:29 +01:00
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static int test_Linux_SWAP(const union swap_header *swap_header, partition_t *partition);
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2007-10-29 22:38:52 +01:00
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2009-02-03 09:29:29 +01:00
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int check_Linux_SWAP(disk_t *disk_car, partition_t *partition)
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2007-10-29 22:38:52 +01:00
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{
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unsigned char *buffer=(unsigned char*)MALLOC(SWAP_SIZE);
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2009-01-31 17:07:08 +01:00
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if(disk_car->pread(disk_car, buffer, SWAP_SIZE, partition->part_offset) != SWAP_SIZE)
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2007-10-29 22:38:52 +01:00
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{
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free(buffer);
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return 1;
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}
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2009-02-03 09:29:29 +01:00
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if(test_Linux_SWAP((union swap_header*)buffer, partition)!=0)
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2007-10-29 22:38:52 +01:00
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{
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free(buffer);
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return 1;
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}
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set_Linux_SWAP_info((union swap_header*)buffer,partition);
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free(buffer);
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return 0;
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}
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static int set_Linux_SWAP_info(const union swap_header *swap_header,partition_t *partition)
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{
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partition->fsname[0]='\0';
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switch(partition->upart_type)
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{
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case UP_LINSWAP:
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snprintf(partition->info,sizeof(partition->info),"SWAP version %u",swap_header->info.version);
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break;
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case UP_LINSWAP2:
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snprintf(partition->info,sizeof(partition->info),"SWAP2 version %u",swap_header->info.version);
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/* set_part_name(partition,swap_header->info.volume_name,16); */
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break;
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default:
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partition->info[0]='\0';
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break;
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}
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return 0;
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}
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2009-02-03 09:29:29 +01:00
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static int test_Linux_SWAP(const union swap_header *swap_header, partition_t *partition)
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2007-10-29 22:38:52 +01:00
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{
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if(memcmp(swap_header->magic.magic,"SWAP-SPACE",10)==0)
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{
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partition->upart_type=UP_LINSWAP;
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return 0;
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}
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if(memcmp(swap_header->magic.magic,"SWAPSPACE2",10)==0)
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{
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if(swap_header->info.last_page==0)
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return 1;
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partition->upart_type=UP_LINSWAP2;
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return 0;
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}
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return 1;
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}
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2009-02-03 09:29:29 +01:00
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int recover_Linux_SWAP(const union swap_header *swap_header, partition_t *partition)
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2007-10-29 22:38:52 +01:00
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{
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2009-02-03 09:29:29 +01:00
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if(test_Linux_SWAP(swap_header, partition)!=0)
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2007-10-29 22:38:52 +01:00
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return 1;
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set_Linux_SWAP_info(swap_header,partition);
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partition->part_type_i386=P_LINSWAP;
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partition->part_type_sun=PSUN_LINSWAP;
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partition->part_type_mac=PMAC_SWAP;
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partition->part_type_gpt=GPT_ENT_TYPE_LINUX_SWAP;
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switch(partition->upart_type)
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{
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case UP_LINSWAP:
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{
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int i, j;
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for(i=PAGE_SIZE-10-1;i>=0;i--)
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if(swap_header->magic.reserved[i]!=(char)0)
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break;
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for(j=7;j>=0;j--)
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if((swap_header->magic.reserved[i]&(1<<j))!=(char)0)
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break;
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partition->part_size=(uint64_t)((8*i+j+1)*PAGE_SIZE);
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}
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break;
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case UP_LINSWAP2:
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partition->part_size=(uint64_t)(swap_header->info.last_page - 1)*PAGE_SIZE;
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break;
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default:
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return 1;
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}
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return 0;
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}
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