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/*
File: jfs.c
Copyright (C) 2004-2008 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 "jfs_superblock.h"
#include "jfs.h"
#include "fnctdsk.h"
#include "log.h"
#include "guid_cpy.h"
static void set_JFS_info(const struct jfs_superblock *sb, partition_t *partition)
{
partition->upart_type=UP_JFS;
partition->blocksize=le32(sb->s_bsize);
snprintf(partition->info, sizeof(partition->info), "JFS %u, blocksize=%u",
(unsigned int)le32(sb->s_version), partition->blocksize);
partition->fsname[0]='\0';
if(le32(sb->s_version)==1)
{
set_part_name(partition,sb->s_fpack,11);
}
}
static int test_JFS(const disk_t *disk_car, const struct jfs_superblock *sb, const partition_t *partition, const int dump_ind)
{
if(memcmp(sb->s_magic,"JFS1",4)!=0)
return 1;
/* Blocksize must be a multiple of 512 */
if(le32(sb->s_bsize)<512 ||
((le32(sb->s_bsize)-1) & le32(sb->s_bsize))!=0)
return 1;
if(dump_ind!=0)
{
log_info("\nJFS 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));
/* There is a little offset ... */
dump_log(sb,DEFAULT_SECTOR_SIZE);
}
/*
if( le32(sb->s_agsize) >= (1 << L2BPERDMAP) ) {
return 2;
}
if(partition->part_size!=0 && (partition->part_size<le64(sb->s_size)))
return 8;
*/
return 0;
}
int check_JFS(disk_t *disk_car, partition_t *partition)
{
unsigned char *buffer=(unsigned char*)MALLOC(JFS_SUPERBLOCK_SIZE);
if(disk_car->pread(disk_car, buffer, JFS_SUPERBLOCK_SIZE, partition->part_offset + 64 * 512) != JFS_SUPERBLOCK_SIZE)
{
free(buffer);
return 1;
}
if(test_JFS(disk_car, (struct jfs_superblock*)buffer, partition,0)!=0)
{
free(buffer);
return 1;
}
set_JFS_info((struct jfs_superblock*)buffer, partition);
free(buffer);
return 0;
}
/*
Primary superblock is at 0x8000
*/
int recover_JFS(const disk_t *disk_car, const struct jfs_superblock *sb,partition_t *partition,const int verbose, const int dump_ind)
{
if(test_JFS(disk_car, sb, partition, dump_ind)!=0)
return 1;
set_JFS_info(sb, partition);
partition->part_type_i386=P_LINUX;
partition->part_type_sun=PSUN_LINUX;
partition->part_type_mac=PMAC_LINUX;
partition->part_type_gpt=GPT_ENT_TYPE_LINUX_DATA;
partition->part_size=(uint64_t)le32(sb->s_pbsize) * le64(sb->s_size) +
(uint64_t)le32(sb->s_bsize) * (le24(sb->s_fsckpxd.len)+le24(sb->s_logpxd.len));
partition->sborg_offset=64*512;
partition->sb_size=JFS_SUPERBLOCK_SIZE;
partition->sb_offset=0;
guid_cpy(&partition->part_uuid, (const efi_guid_t *)&sb->s_uuid);
if(verbose>0)
{
log_info("\n");
log_info("recover_JFS: s_blocksize=%u\n",partition->blocksize);
log_info("recover_JFS: s_size %lu\n",(long unsigned int)le64(sb->s_size));
log_info("recover_JFS: s_fsckpxd.len:%d\n", (int)le24(sb->s_fsckpxd.len));
log_info("recover_JFS: s_logpxd.len:%d\n", (int)le24(sb->s_logpxd.len));
log_info("recover_JFS: part_size %lu\n",(long unsigned)(partition->part_size/disk_car->sector_size));
}
return 0;
}
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