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 minix_super_block {
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24 | uint16_t s_ninodes;
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25 | uint16_t s_nzones;
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26 | uint16_t s_imap_blocks;
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27 | uint16_t s_zmap_blocks;
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28 | uint16_t s_firstdatazone;
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29 | uint16_t s_log_zone_size;
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30 | uint32_t s_max_size;
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31 | uint16_t s_magic;
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32 | uint16_t s_state;
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33 | uint32_t s_zones;
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34 | } PACKED;
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35 |
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36 | #define MINIX_SUPERBLOCK_OFFSET 0x400
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37 |
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38 | int FAST_FUNC volume_id_probe_minix(struct volume_id *id, uint64_t off)
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39 | {
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40 | struct minix_super_block *ms;
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41 |
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42 | dbg("probing at offset 0x%llx", (unsigned long long) off);
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43 |
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44 | ms = volume_id_get_buffer(id, off + MINIX_SUPERBLOCK_OFFSET, 0x200);
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45 | if (ms == NULL)
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46 | return -1;
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47 |
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48 | if (ms->s_magic == cpu_to_le16(0x137f)) {
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49 | // id->type_version[0] = '1';
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50 | goto found;
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51 | }
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52 |
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53 | if (ms->s_magic == cpu_to_le16(0x1387)) {
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54 | // id->type_version[0] = '1';
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55 | goto found;
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56 | }
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57 |
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58 | if (ms->s_magic == cpu_to_le16(0x2468)) {
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59 | // id->type_version[0] = '2';
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60 | goto found;
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61 | }
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62 |
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63 | if (ms->s_magic == cpu_to_le16(0x2478)) {
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64 | // id->type_version[0] = '2';
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65 | goto found;
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66 | }
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67 |
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68 | return -1;
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69 |
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70 | found:
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71 | // id->type_version[1] = '\0';
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72 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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73 | // id->type = "minix";
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74 | return 0;
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75 | }
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