75 lines
2.0 KiB
C
75 lines
2.0 KiB
C
/*
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* volume_id - reads filesystem label and uuid
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*
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* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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//config:### config FEATURE_VOLUMEID_VIARAID
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//config:### bool "via raid"
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//config:### default y
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//config:### depends on VOLUMEID
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//kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_VIARAID) += via_raid.o
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#include "volume_id_internal.h"
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struct via_meta {
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uint16_t signature;
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uint8_t version_number;
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struct via_array {
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uint16_t disk_bits;
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uint8_t disk_array_ex;
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uint32_t capacity_low;
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uint32_t capacity_high;
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uint32_t serial_checksum;
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} PACKED array;
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uint32_t serial_checksum[8];
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uint8_t checksum;
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} PACKED;
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#define VIA_SIGNATURE 0xAA55
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int FAST_FUNC volume_id_probe_via_raid(struct volume_id *id, uint64_t off, uint64_t size)
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{
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uint64_t meta_off;
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struct via_meta *via;
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dbg("probing at offset 0x%llx, size 0x%llx",
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(unsigned long long) off, (unsigned long long) size);
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if (size < 0x10000)
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return -1;
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meta_off = ((size / 0x200)-1) * 0x200;
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via = volume_id_get_buffer(id, off + meta_off, 0x200);
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if (via == NULL)
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return -1;
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if (via->signature != cpu_to_le16(VIA_SIGNATURE))
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return -1;
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if (via->version_number > 1)
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return -1;
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// volume_id_set_usage(id, VOLUME_ID_RAID);
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// id->type_version[0] = '0' + via->version_number;
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// id->type_version[1] = '\0';
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// id->type = "via_raid_member";
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return 0;
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}
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