2 * volume_id - reads filesystem label and uuid
4 * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
6 * Based on information taken from dmraid:
7 * Copyright (C) 2004-2006 Heinz Mauelshagen, Red Hat GmbH
9 * This program is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by the
11 * Free Software Foundation version 2 of the License.
29 #include "libvolume_id.h"
30 #include "libvolume_id-private.h"
35 uint8_t version_number;
37 uint16_t disk_bit_mask;
38 uint8_t disk_array_ex;
39 uint32_t capacity_low;
40 uint32_t capacity_high;
41 uint32_t serial_checksum;
43 uint32_t serial_checksum[8];
47 #define VIA_SIGNATURE 0xAA55
49 /* 8 bit checksum on first 50 bytes of metadata. */
50 static uint8_t meta_checksum(struct via_meta *via)
52 uint8_t i = 50, sum = 0;
55 sum += ((uint8_t*) via)[i];
57 return sum == via->checksum;
61 int volume_id_probe_via_raid(struct volume_id *id, uint64_t off, uint64_t size)
67 dbg("probing at offset 0x%llx, size 0x%llx\n",
68 (unsigned long long) off, (unsigned long long) size);
73 meta_off = ((size / 0x200)-1) * 0x200;
75 buf = volume_id_get_buffer(id, off + meta_off, 0x200);
79 via = (struct via_meta *) buf;
80 if (le16_to_cpu(via->signature) != VIA_SIGNATURE)
83 if (via->version_number > 1)
86 if (!meta_checksum(via))
89 volume_id_set_usage(id, VOLUME_ID_RAID);
90 snprintf(id->type_version, sizeof(id->type_version)-1, "%u", via->version_number);
91 id->type = "via_raid_member";