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/*
* volume_id - reads filesystem label and uuid
*
* Copyright ( C ) 2004 Kay Sievers < kay . sievers @ vrfy . org >
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* Copyright ( C ) 2005 Tobias Klauser < tklauser @ access . unizh . ch >
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*
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* This program 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 version 2 of the License .
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*/
# ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
# endif
# ifdef HAVE_CONFIG_H
# include <config.h>
# endif
# include <stdio.h>
# include <stdlib.h>
# include <unistd.h>
# include <string.h>
# include <errno.h>
# include <ctype.h>
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# include "libvolume_id.h"
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# include "util.h"
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struct reiserfs_super_block {
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uint32_t blocks_count ;
uint32_t free_blocks ;
uint32_t root_block ;
uint32_t journal_block ;
uint32_t journal_dev ;
uint32_t orig_journal_size ;
uint32_t dummy2 [ 5 ] ;
uint16_t blocksize ;
uint16_t dummy3 [ 3 ] ;
uint8_t magic [ 12 ] ;
uint32_t dummy4 [ 5 ] ;
uint8_t uuid [ 16 ] ;
uint8_t label [ 16 ] ;
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} PACKED ;
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struct reiser4_super_block {
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uint8_t magic [ 16 ] ;
uint16_t dummy [ 2 ] ;
uint8_t uuid [ 16 ] ;
uint8_t label [ 16 ] ;
uint64_t dummy2 ;
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} PACKED ;
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# define REISERFS1_SUPERBLOCK_OFFSET 0x2000
# define REISERFS_SUPERBLOCK_OFFSET 0x10000
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int volume_id_probe_reiserfs ( struct volume_id * id , uint64_t off , uint64_t size )
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{
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struct reiserfs_super_block * rs ;
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struct reiser4_super_block * rs4 ;
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uint8_t * buf ;
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info ( " probing at offset 0x%llx " , ( unsigned long long ) off ) ;
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buf = volume_id_get_buffer ( id , off + REISERFS_SUPERBLOCK_OFFSET , 0x200 ) ;
if ( buf = = NULL )
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return - 1 ;
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rs = ( struct reiserfs_super_block * ) buf ;
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if ( memcmp ( rs - > magic , " ReIsErFs " , 8 ) = = 0 ) {
strcpy ( id - > type_version , " 3.5 " ) ;
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id - > type = " reiserfs " ;
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goto found ;
}
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if ( memcmp ( rs - > magic , " ReIsEr2Fs " , 9 ) = = 0 ) {
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strcpy ( id - > type_version , " 3.6 " ) ;
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id - > type = " reiserfs " ;
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goto found_label ;
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}
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if ( memcmp ( rs - > magic , " ReIsEr3Fs " , 9 ) = = 0 ) {
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strcpy ( id - > type_version , " JR " ) ;
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id - > type = " reiserfs " ;
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goto found_label ;
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}
rs4 = ( struct reiser4_super_block * ) buf ;
if ( memcmp ( rs4 - > magic , " ReIsEr4 " , 7 ) = = 0 ) {
strcpy ( id - > type_version , " 4 " ) ;
volume_id_set_label_raw ( id , rs4 - > label , 16 ) ;
volume_id_set_label_string ( id , rs4 - > label , 16 ) ;
volume_id_set_uuid ( id , rs4 - > uuid , UUID_DCE ) ;
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id - > type = " reiser4 " ;
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goto found ;
}
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buf = volume_id_get_buffer ( id , off + REISERFS1_SUPERBLOCK_OFFSET , 0x200 ) ;
if ( buf = = NULL )
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return - 1 ;
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rs = ( struct reiserfs_super_block * ) buf ;
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if ( memcmp ( rs - > magic , " ReIsErFs " , 8 ) = = 0 ) {
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strcpy ( id - > type_version , " 3.5 " ) ;
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id - > type = " reiserfs " ;
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goto found ;
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}
return - 1 ;
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found_label :
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volume_id_set_label_raw ( id , rs - > label , 16 ) ;
volume_id_set_label_string ( id , rs - > label , 16 ) ;
volume_id_set_uuid ( id , rs - > uuid , UUID_DCE ) ;
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found :
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volume_id_set_usage ( id , VOLUME_ID_FILESYSTEM ) ;
return 0 ;
}