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/*
File: rfs.c
Copyright (C) 1998-2006 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
#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 "intrf.h"
static int set_rfs_info(const t_param_disk *disk_car, const struct reiserfs_super_block *sb,t_partition *partition, const int debug, const int dump_ind);
static int test_rfs(const t_param_disk *disk_car, const struct reiserfs_super_block *sb,t_partition *partition,const int debug, const int dump_ind);
static int test_rfs4(const t_param_disk *disk_car, const struct reiser4_master_sb*sb,t_partition *partition,const int debug, const int dump_ind);
static int set_rfs4_info(const t_param_disk *disk_car, const struct reiser4_master_sb*sb,t_partition *partition, const int debug, const int dump_ind);
int check_rfs(t_param_disk *disk_car,t_partition *partition,const int debug)
{
unsigned char *buffer=(unsigned char*)MALLOC(REISERFS_SUPER_BLOCK_SIZE);
if(disk_car->read(disk_car,REISERFS_SUPER_BLOCK_SIZE, buffer, partition->part_offset+128*512)!=0) /* 64k offset */
{
free(buffer);
return 1;
}
if(test_rfs(disk_car,(struct reiserfs_super_block*)buffer,partition,debug,0)==0)
{
set_rfs_info(disk_car,(struct reiserfs_super_block*)buffer,partition,debug,0);
free(buffer);
return 0;
}
if(test_rfs4(disk_car,(struct reiser4_master_sb*)buffer,partition,debug,0)==0)
{
set_rfs4_info(disk_car,(struct reiser4_master_sb*)buffer,partition,debug,0);
free(buffer);
return 0;
}
free(buffer);
return 1;
}
static int test_rfs(const t_param_disk *disk_car, const struct reiserfs_super_block *sb,t_partition *partition,const int debug, const int dump_ind)
{
if (memcmp(sb->s_magic,REISERFS_SUPER_MAGIC,sizeof(REISERFS_SUPER_MAGIC)) == 0)
{
partition->upart_type = UP_RFS;
}
else
if(memcmp(sb->s_magic,REISERFS2_SUPER_MAGIC,sizeof(REISERFS2_SUPER_MAGIC)) == 0)
{
partition->upart_type = UP_RFS2;
}
else
if(memcmp(sb->s_magic,REISERFS3_SUPER_MAGIC,sizeof(REISERFS3_SUPER_MAGIC)) == 0)
{
partition->upart_type = UP_RFS3;
}
else
return 1;
if(debug>0)
ecrit_rapport("\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 (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);
return 0;
}
static int test_rfs4(const t_param_disk *disk_car, const struct reiser4_master_sb *sb,t_partition *partition,const int debug, const int dump_ind)
{
if (memcmp(sb->magic,REISERFS4_SUPER_MAGIC,sizeof(REISERFS4_SUPER_MAGIC)) == 0)
{
partition->upart_type = UP_RFS4;
}
else
return 1;
if(debug>0)
ecrit_rapport("\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(t_param_disk *disk_car, const struct reiserfs_super_block *sb,t_partition *partition,const int debug, const int dump_ind)
{
const struct reiser4_master_sb *sb4=(const struct reiser4_master_sb *)sb;
if(test_rfs(disk_car,sb,partition,debug,dump_ind)==0)
{
if(debug>0 || dump_ind!=0)
{
ecrit_rapport("\nrecover_rfs\n");
ecrit_rapport("block_count=%u\n",(unsigned int)le32(sb->s_block_count));
ecrit_rapport("block_size=%u\n",le16(sb->s_blocksize));
if(dump_ind!=0)
{
dump(stdscr,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;
set_rfs_info(disk_car,sb,partition,debug,dump_ind);
return 0;
}
if(test_rfs4(disk_car,sb4,partition,debug,dump_ind)==0)
{
const struct format40_super *fmt40_super=(const struct format40_super *)((const char*)sb4+le16(sb4->blocksize));
if(debug>0 || dump_ind!=0)
{
ecrit_rapport("\nrecover_rfs\n");
ecrit_rapport("block_count=%lu\n",(unsigned long int)le64(fmt40_super->sb_block_count));
ecrit_rapport("block_size=%u\n",le16(sb4->blocksize));
if(dump_ind!=0)
{
dump(stdscr,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;
set_rfs4_info(disk_car,sb4,partition,debug,dump_ind);
return 0;
}
return 1;
}
static int set_rfs_info(const t_param_disk *disk_car,const struct reiserfs_super_block *sb,t_partition *partition, const int debug, const int dump_ind)
{
partition->name[0]='\0';
partition->info[0]='\0';
switch(partition->upart_type)
{
case UP_RFS:
strncpy(partition->info,"ReiserFS 3.5 with standard journal",sizeof(partition->info));
break;
case UP_RFS2:
strncpy(partition->info,"ReiserFS 3.6 with standard journal",sizeof(partition->info));
set_part_name(partition,(const char*)sb->s_label,16);
break;
case UP_RFS3:
if(le16(sb->sb_version)==1)
strncpy(partition->info,"ReiserFS 3.5 with non standard journal",sizeof(partition->info));
else if(le16(sb->sb_version)==2)
strncpy(partition->info,"ReiserFS 3.6 with non standard journal",sizeof(partition->info));
else
strncpy(partition->info,"ReiserFS ? with non standard journal",sizeof(partition->info));
set_part_name(partition,(const char*)sb->s_label,16);
break;
default:
return 1;
}
if (le16(sb->s_state) == REISERFS_ERROR_FS)
{
strcat(partition->info,", need recovery");
}
return 0;
}
static int set_rfs4_info(const t_param_disk *disk_car,const struct reiser4_master_sb *sb,t_partition *partition, const int debug, const int dump_ind)
{
partition->name[0]='\0';
partition->info[0]='\0';
switch(partition->upart_type)
{
case UP_RFS4:
strncpy(partition->info,"ReiserFS 4",sizeof(partition->info));
break;
default:
return 1;
}
return 0;
}
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