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) 2004 Kay Sievers <kay.sievers@vrfy.org>
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5 | * Copyright (C) 2005 Tobias Klauser <tklauser@access.unizh.ch>
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6 | *
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7 | * This library is free software; you can redistribute it and/or
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8 | * modify it under the terms of the GNU Lesser General Public
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9 | * License as published by the Free Software Foundation; either
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10 | * version 2.1 of the License, or (at your option) any later version.
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11 | *
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12 | * This library is distributed in the hope that it will be useful,
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13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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15 | * Lesser General Public License for more details.
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16 | *
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17 | * You should have received a copy of the GNU Lesser General Public
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18 | * License along with this library; if not, write to the Free Software
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19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 | */
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21 |
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22 | #include "volume_id_internal.h"
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23 |
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24 | struct reiserfs_super_block {
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25 | uint32_t blocks_count;
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26 | uint32_t free_blocks;
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27 | uint32_t root_block;
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28 | uint32_t journal_block;
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29 | uint32_t journal_dev;
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30 | uint32_t orig_journal_size;
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31 | uint32_t dummy2[5];
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32 | uint16_t blocksize;
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33 | uint16_t dummy3[3];
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34 | uint8_t magic[12];
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35 | uint32_t dummy4[5];
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36 | uint8_t uuid[16];
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37 | uint8_t label[16];
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38 | } PACKED;
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39 |
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40 | struct reiser4_super_block {
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41 | uint8_t magic[16];
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42 | uint16_t dummy[2];
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43 | uint8_t uuid[16];
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44 | uint8_t label[16];
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45 | uint64_t dummy2;
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46 | } PACKED;
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47 |
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48 | #define REISERFS1_SUPERBLOCK_OFFSET 0x2000
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49 | #define REISERFS_SUPERBLOCK_OFFSET 0x10000
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50 |
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51 | int FAST_FUNC volume_id_probe_reiserfs(struct volume_id *id /*,uint64_t off*/)
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52 | {
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53 | #define off ((uint64_t)0)
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54 | struct reiserfs_super_block *rs;
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55 | struct reiser4_super_block *rs4;
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56 |
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57 | dbg("reiserfs: probing at offset 0x%llx", (unsigned long long) off);
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58 |
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59 | rs = volume_id_get_buffer(id, off + REISERFS_SUPERBLOCK_OFFSET, 0x200);
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60 | if (rs == NULL)
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61 | return -1;
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62 |
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63 | if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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64 | dbg("reiserfs: ReIsErFs, no label");
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65 | // strcpy(id->type_version, "3.5");
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66 | goto found;
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67 | }
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68 | if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
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69 | dbg("reiserfs: ReIsEr2Fs");
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70 | // strcpy(id->type_version, "3.6");
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71 | goto found_label;
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72 | }
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73 | if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
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74 | dbg("reiserfs: ReIsEr3Fs");
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75 | // strcpy(id->type_version, "JR");
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76 | goto found_label;
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77 | }
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78 |
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79 | rs4 = (struct reiser4_super_block *) rs;
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80 | if (memcmp(rs4->magic, "ReIsEr4", 7) == 0) {
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81 | // strcpy(id->type_version, "4");
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82 | // volume_id_set_label_raw(id, rs4->label, 16);
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83 | volume_id_set_label_string(id, rs4->label, 16);
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84 | volume_id_set_uuid(id, rs4->uuid, UUID_DCE);
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85 | dbg("reiserfs: ReIsEr4, label '%s' uuid '%s'", id->label, id->uuid);
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86 | goto found;
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87 | }
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88 |
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89 | rs = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200);
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90 | if (rs == NULL)
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91 | return -1;
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92 |
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93 | if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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94 | dbg("reiserfs: ReIsErFs, no label");
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95 | // strcpy(id->type_version, "3.5");
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96 | goto found;
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97 | }
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98 |
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99 | dbg("reiserfs: no signature found");
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100 | return -1;
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101 |
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102 | found_label:
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103 | // volume_id_set_label_raw(id, rs->label, 16);
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104 | volume_id_set_label_string(id, rs->label, 16);
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105 | volume_id_set_uuid(id, rs->uuid, UUID_DCE);
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106 | dbg("reiserfs: label '%s' uuid '%s'", id->label, id->uuid);
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107 |
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108 | found:
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109 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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110 | IF_FEATURE_BLKID_TYPE(id->type = "reiserfs";)
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111 |
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112 | return 0;
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113 | }
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