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/*
* volume_id - reads filesystem label and uuid
*
* Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
//kbuild:### lib-$(CONFIG_FEATURE_VOLUMEID_PROMISERAID) += promise_raid.o
//config:### config FEATURE_VOLUMEID_PROMISERAID
//config:### bool "promise raid"
//config:### default y
//config:### depends on VOLUMEID
#include "volume_id_internal.h"
struct promise_meta {
uint8_t sig[24];
} PACKED;
#define PDC_CONFIG_OFF 0x1200
#define PDC_SIGNATURE "Promise Technology, Inc."
int FAST_FUNC volume_id_probe_promise_fasttrack_raid(struct volume_id *id, uint64_t off, uint64_t size)
{
static const unsigned short sectors[] = {
63, 255, 256, 16, 399
};
struct promise_meta *pdc;
unsigned i;
dbg("probing at offset 0x%llx, size 0x%llx",
(unsigned long long) off, (unsigned long long) size);
if (size < 0x40000)
return -1;
for (i = 0; i < ARRAY_SIZE(sectors); i++) {
uint64_t meta_off;
meta_off = ((size / 0x200) - sectors[i]) * 0x200;
pdc = volume_id_get_buffer(id, off + meta_off, 0x200);
if (pdc == NULL)
return -1;
if (memcmp(pdc->sig, PDC_SIGNATURE, sizeof(PDC_SIGNATURE)-1) == 0)
goto found;
}
return -1;
found:
// volume_id_set_usage(id, VOLUME_ID_RAID);
// id->type = "promise_fasttrack_raid_member";
return 0;
}
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