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/*
File: rfs.c
Copyright (C) 1998-2007 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 "rfs.h"
#include "fnctdsk.h"
#include "log.h"
#include "guid_cpy.h"
static void set_rfs_info(const struct reiserfs_super_block *sb, partition_t *partition);
static int test_rfs(const disk_t *disk_car, const struct reiserfs_super_block *sb, const partition_t *partition, const int verbose);
static int test_rfs4(const disk_t *disk_car, const struct reiser4_master_sb*sb, const partition_t *partition, const int verbose);
static void set_rfs4_info(const struct reiser4_master_sb *sb4, partition_t *partition)
{
partition->upart_type = UP_RFS4;
partition->fsname[0]='\0';
partition->blocksize=le16(sb4->blocksize);
snprintf(partition->info, sizeof(partition->info),
"ReiserFS 4 blocksize=%u", partition->blocksize);
}
int check_rfs(disk_t *disk_car,partition_t *partition,const int verbose)
{
unsigned char *buffer=(unsigned char*)MALLOC(REISERFS_SUPER_BLOCK_SIZE);
if(disk_car->pread(disk_car, buffer, REISERFS_SUPER_BLOCK_SIZE, partition->part_offset + 128 * 512) != REISERFS_SUPER_BLOCK_SIZE) /* 64k offset */
{
free(buffer);
return 1;
}
if(test_rfs(disk_car, (struct reiserfs_super_block*)buffer, partition, verbose)==0)
{
set_rfs_info((struct reiserfs_super_block*)buffer, partition);
free(buffer);
return 0;
}
if(test_rfs4(disk_car, (struct reiser4_master_sb*)buffer, partition, verbose)==0)
{
set_rfs4_info((const struct reiser4_master_sb*)buffer, partition);
free(buffer);
return 0;
}
free(buffer);
return 1;
}
static int test_rfs(const disk_t *disk_car, const struct reiserfs_super_block *sb, const partition_t *partition, const int verbose)
{
if (memcmp(sb->s_magic,REISERFS_SUPER_MAGIC,sizeof(REISERFS_SUPER_MAGIC)) != 0 &&
memcmp(sb->s_magic,REISERFS2_SUPER_MAGIC,sizeof(REISERFS2_SUPER_MAGIC)) != 0 &&
memcmp(sb->s_magic,REISERFS3_SUPER_MAGIC,sizeof(REISERFS3_SUPER_MAGIC)) != 0)
return 1;
/*
* sanity checks.
*/
if (le32(sb->s_block_count) < le32(sb->s_free_blocks))
return (1);
if (le32(sb->s_block_count) < REISERFS_MIN_BLOCK_AMOUNT)
return (1);
if ((le16(sb->s_state) != REISERFS_VALID_FS) &&
(le16(sb->s_state) != REISERFS_ERROR_FS))
return (1);
if (le16(sb->s_oid_maxsize) % 2!=0) /* must be even */
return (1);
if (le16(sb->s_oid_maxsize) < le16(sb->s_oid_cursize))
return (1);
if ((le16(sb->s_blocksize) != 4096) && (le16(sb->s_blocksize) != 8192))
return (1);
if(partition==NULL)
return 0;
if(verbose>0)
log_info("\nReiserFS Marker at %u/%u/%u\n",
offset2cylinder(disk_car,partition->part_offset),
offset2head(disk_car,partition->part_offset),
offset2sector(disk_car,partition->part_offset));
return 0;
}
static int test_rfs4(const disk_t *disk_car, const struct reiser4_master_sb *sb, const partition_t *partition, const int verbose)
{
if (memcmp(sb->magic,REISERFS4_SUPER_MAGIC,sizeof(REISERFS4_SUPER_MAGIC)) != 0)
return 1;
if(verbose>0)
log_info("\nReiserFS Marker at %u/%u/%u\n", offset2cylinder(disk_car,partition->part_offset),offset2head(disk_car,partition->part_offset),offset2sector(disk_car,partition->part_offset));
/*
* sanity checks.
*/
if (le16(sb->blocksize) != 4096)
return (1);
/* if a value > 4096 become legal, the code will break while reading the filesystem size (read out of bound) */
return 0;
}
int recover_rfs(const disk_t *disk_car, const struct reiserfs_super_block *sb,partition_t *partition,const int verbose, const int dump_ind)
{
const struct reiser4_master_sb *sb4=(const struct reiser4_master_sb *)sb;
if(test_rfs(disk_car, sb, partition, verbose)==0)
{
if(verbose>0 || dump_ind!=0)
{
log_info("\nrecover_rfs\n");
log_info("block_count=%u\n",(unsigned int)le32(sb->s_block_count));
log_info("block_size=%u\n",le16(sb->s_blocksize));
if(dump_ind!=0)
{
dump_log(sb,DEFAULT_SECTOR_SIZE);
}
}
partition->part_size = (uint64_t)le32(sb->s_block_count) * le16(sb->s_blocksize);
partition->part_type_i386 = P_LINUX;
partition->part_type_mac= PMAC_LINUX;
partition->part_type_sun= PSUN_LINUX;
partition->part_type_gpt=GPT_ENT_TYPE_LINUX_DATA;
guid_cpy(&partition->part_uuid, (const efi_guid_t *)&sb->s_uuid);
set_rfs_info(sb, partition);
return 0;
}
if(test_rfs4(disk_car, sb4, partition, verbose)==0)
{
const struct format40_super *fmt40_super=(const struct format40_super *)((const char*)sb4+le16(sb4->blocksize));
if(verbose>0 || dump_ind!=0)
{
log_info("\nrecover_rfs\n");
log_info("block_count=%lu\n",(unsigned long int)le64(fmt40_super->sb_block_count));
log_info("block_size=%u\n",le16(sb4->blocksize));
if(dump_ind!=0)
{
dump_log(sb,DEFAULT_SECTOR_SIZE);
}
}
partition->part_size = (uint64_t)le64(fmt40_super->sb_block_count) * le16(sb4->blocksize);
partition->part_type_i386 = P_LINUX;
partition->part_type_mac= PMAC_LINUX;
partition->part_type_sun= PSUN_LINUX;
partition->part_type_gpt=GPT_ENT_TYPE_LINUX_DATA;
guid_cpy(&partition->part_uuid, (const efi_guid_t *)&sb4->uuid);
set_rfs4_info(sb4, partition);
return 0;
}
return 1;
}
static void set_rfs_info(const struct reiserfs_super_block *sb, partition_t *partition)
{
partition->fsname[0]='\0';
partition->blocksize=le16(sb->s_blocksize);
if (memcmp(sb->s_magic,REISERFS_SUPER_MAGIC,sizeof(REISERFS_SUPER_MAGIC)) == 0)
{
partition->upart_type = UP_RFS;
snprintf(partition->info, sizeof(partition->info),
"ReiserFS 3.5 with standard journal blocksize=%u", partition->blocksize);
}
else if(memcmp(sb->s_magic,REISERFS2_SUPER_MAGIC,sizeof(REISERFS2_SUPER_MAGIC)) == 0)
{
partition->upart_type = UP_RFS2;
snprintf(partition->info, sizeof(partition->info),
"ReiserFS 3.6 with standard journal blocksize=%u", partition->blocksize);
set_part_name(partition,(const char*)sb->s_label,16);
}
else if(memcmp(sb->s_magic,REISERFS3_SUPER_MAGIC,sizeof(REISERFS3_SUPER_MAGIC)) == 0)
{
partition->upart_type = UP_RFS3;
if(le16(sb->sb_version)==1)
snprintf(partition->info, sizeof(partition->info),
"ReiserFS 3.5 with non standard journal blocksize=%u", partition->blocksize);
else if(le16(sb->sb_version)==2)
snprintf(partition->info, sizeof(partition->info),
"ReiserFS 3.6 with non standard journal blocksize=%u", partition->blocksize);
else
snprintf(partition->info, sizeof(partition->info),
"ReiserFS 3.? with non standard journal blocksize=%u", partition->blocksize);
set_part_name(partition,(const char*)sb->s_label,16);
}
if(le16(sb->s_state) == REISERFS_ERROR_FS)
{
strcat(partition->info,", need recovery");
}
}
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