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/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
* Copyright (C) 2005 Tobias Klauser <tklauser@access.unizh.ch>
*
* 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.
*/
#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>
#include "libvolume_id.h"
#include "logging.h"
#include "util.h"
struct reiserfs_super_block {
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];
} PACKED;
struct reiser4_super_block {
uint8_t magic[16];
uint16_t dummy[2];
uint8_t uuid[16];
uint8_t label[16];
uint64_t dummy2;
} PACKED;
#define REISERFS1_SUPERBLOCK_OFFSET 0x2000
#define REISERFS_SUPERBLOCK_OFFSET 0x10000
int volume_id_probe_reiserfs(struct volume_id *id, uint64_t off)
{
struct reiserfs_super_block *rs;
struct reiser4_super_block *rs4;
uint8_t *buf;
dbg("probing at offset 0x%llx", (unsigned long long) off);
buf = volume_id_get_buffer(id, off + REISERFS_SUPERBLOCK_OFFSET, 0x200);
if (buf == NULL)
return -1;
rs = (struct reiserfs_super_block *) buf;;
if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
strcpy(id->type_version, "3.5");
id->type = "reiserfs";
goto found;
}
if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
strcpy(id->type_version, "3.6");
id->type = "reiserfs";
goto found_label;
}
if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
strcpy(id->type_version, "JR");
id->type = "reiserfs";
goto found_label;
}
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);
id->type = "reiser4";
goto found;
}
buf = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200);
if (buf == NULL)
return -1;
rs = (struct reiserfs_super_block *) buf;
if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
strcpy(id->type_version, "3.5");
id->type = "reiserfs";
goto found;
}
return -1;
found_label:
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);
found:
volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
return 0;
}
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