oracleasm.c revision 2603474ff9be2418900581da1af5cccc9f13cae1
/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2004 Kay Sievers <kay.sievers@vrfy.org>
*
* 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 "libvolume_id-private.h"
#include "util.h"
struct oracleasm_super_block {
uint8_t tag[8];
uint8_t id[24];
} PACKED;
#define ASM_SB_OFF 0x20
#define ASM_MAGIC "ORCLDISK"
/*
* Detect Oracle Automatic Storage Management (ASM).
* It can do mirroring, but don't consider it RAID in the sense
* that an ext3 filesystem could live inside. Thus, mark it 'other'.
* There also is a magic word 'ORCLCLRD'; like blkid(8), we ignore that.
*/
int volume_id_probe_oracleasm(struct volume_id *id, uint64_t off, uint64_t size)
{
const uint8_t *buf;
struct oracleasm_super_block *oracleasm;
info("probing at offset 0x%llx\n", (unsigned long long) off);
buf = volume_id_get_buffer(id, off + ASM_SB_OFF, 0x800);
if (buf == NULL)
return -1;
oracleasm = (struct oracleasm_super_block *) buf;
if (memcmp(oracleasm->tag, ASM_MAGIC, 8) != 0)
return -1;
volume_id_set_usage(id, VOLUME_ID_OTHER);
volume_id_set_label_raw(id, oracleasm->id, 24);
volume_id_set_label_string(id, oracleasm->id, 24);
id->type = "oracleasm";
return 0;
}