1 | /*
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2 | * volume_id - reads filesystem label and uuid
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3 | *
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4 | * Copyright (C) 2005 Kay Sievers <kay.sievers@vrfy.org>
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5 | *
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6 | * This library is free software; you can redistribute it and/or
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7 | * modify it under the terms of the GNU Lesser General Public
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8 | * License as published by the Free Software Foundation; either
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9 | * version 2.1 of the License, or (at your option) any later version.
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10 | *
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11 | * This library is distributed in the hope that it will be useful,
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12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | * Lesser General Public License for more details.
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15 | *
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16 | * You should have received a copy of the GNU Lesser General Public
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17 | * License along with this library; if not, write to the Free Software
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18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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19 | */
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20 |
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21 | #include "volume_id_internal.h"
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22 |
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23 | struct promise_meta {
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24 | uint8_t sig[24];
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25 | } PACKED;
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26 |
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27 | #define PDC_CONFIG_OFF 0x1200
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28 | #define PDC_SIGNATURE "Promise Technology, Inc."
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29 |
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30 | int FAST_FUNC volume_id_probe_promise_fasttrack_raid(struct volume_id *id, uint64_t off, uint64_t size)
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31 | {
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32 | static const unsigned short sectors[] = {
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33 | 63, 255, 256, 16, 399
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34 | };
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35 |
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36 | struct promise_meta *pdc;
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37 | unsigned i;
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38 |
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39 | dbg("probing at offset 0x%llx, size 0x%llx",
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40 | (unsigned long long) off, (unsigned long long) size);
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41 |
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42 | if (size < 0x40000)
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43 | return -1;
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44 |
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45 | for (i = 0; i < ARRAY_SIZE(sectors); i++) {
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46 | uint64_t meta_off;
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47 |
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48 | meta_off = ((size / 0x200) - sectors[i]) * 0x200;
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49 | pdc = volume_id_get_buffer(id, off + meta_off, 0x200);
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50 | if (pdc == NULL)
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51 | return -1;
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52 |
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53 | if (memcmp(pdc->sig, PDC_SIGNATURE, sizeof(PDC_SIGNATURE)-1) == 0)
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54 | goto found;
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55 | }
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56 | return -1;
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57 |
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58 | found:
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59 | // volume_id_set_usage(id, VOLUME_ID_RAID);
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60 | // id->type = "promise_fasttrack_raid_member";
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61 |
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62 | return 0;
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63 | }
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