1/* 2 * volume_id - reads filesystem label and uuid 3 * 4 * Copyright (C) 2007 Kay Sievers <kay.sievers@vrfy.org> 5 * 6 * This program is free software; you can redistribute it and/or modify it 7 * under the terms of the GNU General Public License as published by the 8 * Free Software Foundation version 2 of the License. 9 */ 10 11#ifndef _GNU_SOURCE 12#define _GNU_SOURCE 1 13#endif 14 15#ifdef HAVE_CONFIG_H 16# include <config.h> 17#endif 18 19#include <stdio.h> 20#include <stdlib.h> 21#include <unistd.h> 22#include <string.h> 23#include <errno.h> 24#include <ctype.h> 25#include <byteswap.h> 26 27#include "libvolume_id.h" 28#include "util.h" 29 30/* http://www.snia.org/standards/home */ 31 32#define DDF_HEADER 0xDE11DE11 33#define DDF_GUID_LENGTH 24 34#define DDF_REV_LENGTH 8 35 36static struct ddf_header { 37 uint32_t signature; 38 uint32_t crc; 39 uint8_t guid[DDF_GUID_LENGTH]; 40 uint8_t ddf_rev[DDF_REV_LENGTH]; 41} PACKED *ddf; 42 43int volume_id_probe_ddf_raid(struct volume_id *id, uint64_t off, uint64_t size) 44{ 45 uint64_t ddf_off = ((size / 0x200)-1) * 0x200; 46 const uint8_t *buf; 47 48 info("probing at offset 0x%llx, size 0x%llx", 49 (unsigned long long) off, (unsigned long long) size); 50 if (size < 0x10000) 51 return -1; 52 53 buf = volume_id_get_buffer(id, off + ddf_off, 0x200); 54 if (buf == NULL) 55 return -1; 56 ddf = (struct ddf_header *) buf; 57 58 if (ddf->signature != cpu_to_be32(DDF_HEADER)) 59 return -1; 60 61 volume_id_set_uuid(id, ddf->guid, DDF_GUID_LENGTH, UUID_STRING); 62 snprintf(id->type_version, DDF_REV_LENGTH, "%s", ddf->ddf_rev); 63 volume_id_set_usage(id, VOLUME_ID_RAID); 64 id->type = "ddf_raid_member"; 65 return 0; 66} 67