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/*
File: lvm.c
Copyright (C) 2003-2008 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
#ifdef HAVE_STRING_H
#include <string.h>
#endif
#include "types.h"
#include "common.h"
#include "lvm.h"
#include "fnctdsk.h"
#include "log.h"
#include "guid_cpy.h"
static void set_LVM_info(partition_t *partition)
{
partition->upart_type=UP_LVM;
partition->fsname[0]='\0';
partition->info[0]='\0';
snprintf(partition->info,sizeof(partition->info),"LVM");
}
static int test_LVM(const disk_t *disk_car, const pv_disk_t *pv, const partition_t *partition, const int verbose, const int dump_ind)
{
if ((memcmp((const char *)pv->id,LVM_ID,sizeof(pv->id)) == 0) && (le16(pv->version) == 1 || le16(pv->version) == 2))
{
uint32_t size;
if(verbose>0 || dump_ind!=0)
{
log_info("\nLVM magic value at %u/%u/%u\n", offset2cylinder(disk_car,partition->part_offset),offset2head(disk_car,partition->part_offset),offset2sector(disk_car,partition->part_offset));
}
if(dump_ind!=0)
{
/* There is a little offset ... */
dump_log(pv,DEFAULT_SECTOR_SIZE);
}
if (le32(pv->pv_size) > LVM_MAX_SIZE)
return (1);
if (le32(pv->pv_status) != 0 && le32(pv->pv_status) != PV_ACTIVE)
return (1);
if (le32(pv->pv_allocatable) != 0 && le32(pv->pv_allocatable) != PV_ALLOCATABLE)
return (1);
if (le32(pv->lv_cur) > MAX_LV)
return (1);
if (strlen((const char *)pv->vg_name) > NAME_LEN / 2)
return (1);
size = le32(pv->pe_size) / LVM_MIN_PE_SIZE * LVM_MIN_PE_SIZE;
if ((le32(pv->pe_size) != size) ||
(le32(pv->pe_size) < LVM_MIN_PE_SIZE) ||
(le32(pv->pe_size) > LVM_MAX_PE_SIZE))
return (1);
if (le32(pv->pe_total) > ( pv->pe_on_disk.size / sizeof ( disk_pe_t)))
return (1);
if (le32(pv->pe_allocated) > le32(pv->pe_total))
return (1);
return 0;
}
return 1;
}
int check_LVM(disk_t *disk_car,partition_t *partition,const int verbose)
{
unsigned char *buffer=(unsigned char*)MALLOC(LVM_PV_DISK_SIZE);
if(disk_car->pread(disk_car, buffer, LVM_PV_DISK_SIZE, partition->part_offset) != LVM_PV_DISK_SIZE)
{
free(buffer);
return 1;
}
if(test_LVM(disk_car,(pv_disk_t *)buffer,partition,verbose,0)!=0)
{
free(buffer);
return 1;
}
set_LVM_info(partition);
free(buffer);
return 0;
}
int recover_LVM(const disk_t *disk_car, const pv_disk_t *pv,partition_t *partition,const int verbose, const int dump_ind)
{
if(test_LVM(disk_car,pv,partition,verbose,dump_ind)!=0)
return 1;
set_LVM_info(partition);
partition->part_type_i386=P_LVM;
partition->part_type_sun=PSUN_LVM;
partition->part_type_gpt=GPT_ENT_TYPE_LINUX_LVM;
partition->part_size=(uint64_t)le32(pv->pv_size)*disk_car->sector_size;
/* pv_uuid is bigger than part_uuid */
guid_cpy(&partition->part_uuid, (const efi_guid_t *)&pv->pv_uuid);
if(verbose>0)
{
log_info("part_size %lu\n",(long unsigned)(partition->part_size/disk_car->sector_size));
}
return 0;
}
static void set_LVM2_info(partition_t*partition)
{
partition->upart_type=UP_LVM2;
partition->fsname[0]='\0';
partition->info[0]='\0';
snprintf(partition->info,sizeof(partition->info),"LVM2");
}
static int test_LVM2(const disk_t *disk_car, const struct lvm2_label_header *lh, const partition_t *partition, const int verbose, const int dump_ind)
{
if (memcmp((const char *)lh->type,LVM2_LABEL,sizeof(lh->type)) == 0)
{
if(verbose>0 || dump_ind!=0)
{
log_info("\nLVM2 magic value at %u/%u/%u\n", offset2cylinder(disk_car,partition->part_offset),offset2head(disk_car,partition->part_offset),offset2sector(disk_car,partition->part_offset));
}
if(le32(lh->offset_xl)>400)
return 1;
if(dump_ind!=0)
{
/* There is a little offset ... */
dump_log(lh,DEFAULT_SECTOR_SIZE);
}
return 0;
}
return 1;
}
int check_LVM2(disk_t *disk_car,partition_t *partition,const int verbose)
{
unsigned char *buffer=(unsigned char *)MALLOC(DEFAULT_SECTOR_SIZE);
if(disk_car->pread(disk_car, buffer, DEFAULT_SECTOR_SIZE, partition->part_offset + 0x200) != DEFAULT_SECTOR_SIZE)
{
free(buffer);
return 1;
}
if(test_LVM2(disk_car,(const struct lvm2_label_header *)buffer,partition,verbose,0)!=0)
{
free(buffer);
return 1;
}
set_LVM2_info(partition);
free(buffer);
return 0;
}
int recover_LVM2(const disk_t *disk_car, const unsigned char *buf,partition_t *partition,const int verbose, const int dump_ind)
{
const struct lvm2_label_header *lh=(const struct lvm2_label_header *)buf;
if(test_LVM2(disk_car,lh,partition,verbose,dump_ind)!=0)
return 1;
set_LVM2_info(partition);
partition->part_type_i386=P_LVM;
partition->part_type_sun=PSUN_LVM;
partition->part_type_gpt=GPT_ENT_TYPE_LINUX_LVM;
{
const struct lvm2_pv_header *pvhdr;
pvhdr=(const struct lvm2_pv_header *) (buf + le32(lh->offset_xl));
partition->part_size=le64(pvhdr->device_size_xl);
}
if(verbose>0)
{
log_info("part_size %lu\n",(long unsigned)(partition->part_size/disk_car->sector_size));
}
return 0;
}
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