64 lines
1.8 KiB
C
64 lines
1.8 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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#include "volume_id_internal.h"
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struct promise_meta {
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uint8_t sig[24];
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} __attribute__((packed));
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#define PDC_CONFIG_OFF 0x1200
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#define PDC_SIGNATURE "Promise Technology, Inc."
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int volume_id_probe_promise_fasttrack_raid(struct volume_id *id, uint64_t off, uint64_t size)
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{
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static const unsigned short sectors[] = {
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63, 255, 256, 16, 399
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};
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struct promise_meta *pdc;
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unsigned i;
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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 < 0x40000)
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return -1;
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for (i = 0; i < ARRAY_SIZE(sectors); i++) {
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uint64_t meta_off;
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meta_off = ((size / 0x200) - sectors[i]) * 0x200;
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pdc = volume_id_get_buffer(id, off + meta_off, 0x200);
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if (pdc == NULL)
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return -1;
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if (memcmp(pdc->sig, PDC_SIGNATURE, sizeof(PDC_SIGNATURE)-1) == 0)
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goto found;
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}
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return -1;
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found:
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volume_id_set_usage(id, VOLUME_ID_RAID);
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id->type = "promise_fasttrack_raid_member";
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return 0;
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}
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