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 | //kbuild:lib-$(CONFIG_FEATURE_VOLUMEID_REISERFS) += reiserfs.o
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23 |
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24 | //config:
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25 | //config:config FEATURE_VOLUMEID_REISERFS
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26 | //config: bool "Reiser filesystem"
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27 | //config: default y
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28 | //config: depends on VOLUMEID
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29 | //config: help
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30 | //config: TODO
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31 | //config:
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32 |
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33 | #include "volume_id_internal.h"
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34 |
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35 | struct reiserfs_super_block {
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36 | uint32_t blocks_count;
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37 | uint32_t free_blocks;
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38 | uint32_t root_block;
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39 | uint32_t journal_block;
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40 | uint32_t journal_dev;
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41 | uint32_t orig_journal_size;
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42 | uint32_t dummy2[5];
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43 | uint16_t blocksize;
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44 | uint16_t dummy3[3];
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45 | uint8_t magic[12];
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46 | uint32_t dummy4[5];
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47 | uint8_t uuid[16];
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48 | uint8_t label[16];
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49 | } PACKED;
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50 |
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51 | struct reiser4_super_block {
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52 | uint8_t magic[16];
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53 | uint16_t dummy[2];
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54 | uint8_t uuid[16];
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55 | uint8_t label[16];
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56 | uint64_t dummy2;
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57 | } PACKED;
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58 |
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59 | #define REISERFS1_SUPERBLOCK_OFFSET 0x2000
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60 | #define REISERFS_SUPERBLOCK_OFFSET 0x10000
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61 |
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62 | int FAST_FUNC volume_id_probe_reiserfs(struct volume_id *id /*,uint64_t off*/)
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63 | {
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64 | #define off ((uint64_t)0)
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65 | struct reiserfs_super_block *rs;
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66 | struct reiser4_super_block *rs4;
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67 |
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68 | dbg("reiserfs: probing at offset 0x%llx", (unsigned long long) off);
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69 |
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70 | rs = volume_id_get_buffer(id, off + REISERFS_SUPERBLOCK_OFFSET, 0x200);
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71 | if (rs == NULL)
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72 | return -1;
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73 |
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74 | if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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75 | dbg("reiserfs: ReIsErFs, no label");
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76 | // strcpy(id->type_version, "3.5");
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77 | goto found;
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78 | }
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79 | if (memcmp(rs->magic, "ReIsEr2Fs", 9) == 0) {
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80 | dbg("reiserfs: ReIsEr2Fs");
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81 | // strcpy(id->type_version, "3.6");
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82 | goto found_label;
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83 | }
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84 | if (memcmp(rs->magic, "ReIsEr3Fs", 9) == 0) {
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85 | dbg("reiserfs: ReIsEr3Fs");
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86 | // strcpy(id->type_version, "JR");
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87 | goto found_label;
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88 | }
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89 |
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90 | rs4 = (struct reiser4_super_block *) rs;
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91 | if (memcmp(rs4->magic, "ReIsEr4", 7) == 0) {
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92 | // strcpy(id->type_version, "4");
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93 | // volume_id_set_label_raw(id, rs4->label, 16);
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94 | volume_id_set_label_string(id, rs4->label, 16);
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95 | volume_id_set_uuid(id, rs4->uuid, UUID_DCE);
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96 | dbg("reiserfs: ReIsEr4, label '%s' uuid '%s'", id->label, id->uuid);
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97 | goto found;
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98 | }
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99 |
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100 | rs = volume_id_get_buffer(id, off + REISERFS1_SUPERBLOCK_OFFSET, 0x200);
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101 | if (rs == NULL)
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102 | return -1;
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103 |
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104 | if (memcmp(rs->magic, "ReIsErFs", 8) == 0) {
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105 | dbg("reiserfs: ReIsErFs, no label");
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106 | // strcpy(id->type_version, "3.5");
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107 | goto found;
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108 | }
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109 |
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110 | dbg("reiserfs: no signature found");
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111 | return -1;
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112 |
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113 | found_label:
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114 | // volume_id_set_label_raw(id, rs->label, 16);
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115 | volume_id_set_label_string(id, rs->label, 16);
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116 | volume_id_set_uuid(id, rs->uuid, UUID_DCE);
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117 | dbg("reiserfs: label '%s' uuid '%s'", id->label, id->uuid);
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118 |
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119 | found:
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120 | // volume_id_set_usage(id, VOLUME_ID_FILESYSTEM);
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121 | IF_FEATURE_BLKID_TYPE(id->type = "reiserfs";)
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122 |
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123 | return 0;
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124 | }
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