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authorChristophe Grenier <grenier@cgsecurity.org>2007-10-29 22:38:52 +0100
committerChristophe Grenier <grenier@cgsecurity.org>2007-10-29 22:38:52 +0100
commit9928d99936105b4653d2d1b8ca74dc3ffba5c71e (patch)
tree06aa4f5e9f0055027c6fb54dd47a8414cf2fba32 /src/lvm.c
First version in git
Diffstat (limited to 'src/lvm.c')
-rw-r--r--src/lvm.c193
1 files changed, 193 insertions, 0 deletions
diff --git a/src/lvm.c b/src/lvm.c
new file mode 100644
index 0000000..c36ae02
--- /dev/null
+++ b/src/lvm.c
@@ -0,0 +1,193 @@
+/*
+
+ File: lvm.c
+
+ Copyright (C) 2003-2007 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 int set_LVM_info(partition_t *partition, const pv_disk_t *pv);
+static int set_LVM2_info(partition_t*partition, const unsigned char *buf);
+
+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->read(disk_car,LVM_PV_DISK_SIZE, buffer, partition->part_offset)!=0)
+ {
+ 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,(pv_disk_t *)buffer);
+ free(buffer);
+ return 0;
+}
+
+int recover_LVM(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,pv);
+ 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;
+}
+
+int test_LVM(disk_t *disk_car, const pv_disk_t *pv,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);
+ partition->upart_type=UP_LVM;
+ return 0;
+ }
+ return 1;
+}
+
+static int set_LVM_info(partition_t *partition, const pv_disk_t *pv)
+{
+ partition->fsname[0]='\0';
+ partition->info[0]='\0';
+ snprintf(partition->info,sizeof(partition->info),"LVM");
+ return 0;
+}
+
+int check_LVM2(disk_t *disk_car,partition_t *partition,const int verbose)
+{
+ unsigned char *buffer=MALLOC(DEFAULT_SECTOR_SIZE);
+ if(disk_car->read(disk_car,DEFAULT_SECTOR_SIZE, buffer, partition->part_offset+0x200)!=0)
+ {
+ 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,buffer);
+ free(buffer);
+ return 0;
+}
+
+int recover_LVM2(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,buf);
+ 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;
+}
+
+int test_LVM2(disk_t *disk_car, const struct lvm2_label_header *lh,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);
+ }
+ partition->upart_type=UP_LVM2;
+ return 0;
+ }
+ return 1;
+}
+
+static int set_LVM2_info(partition_t*partition, const unsigned char *buf)
+{
+ partition->fsname[0]='\0';
+ partition->info[0]='\0';
+ snprintf(partition->info,sizeof(partition->info),"LVM2");
+ return 0;
+}