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 "libbb.h"
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22 | #include "volume_id.h"
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23 |
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24 | PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
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25 |
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26 | #define dbg(...) ((void)0)
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27 | /* #define dbg(...) bb_error_msg(__VA_ARGS__) */
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28 |
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29 | /* volume_id.h */
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30 |
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31 | #define VOLUME_ID_VERSION 48
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32 |
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33 | #define VOLUME_ID_LABEL_SIZE 64
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34 | #define VOLUME_ID_UUID_SIZE 36
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35 | #define VOLUME_ID_FORMAT_SIZE 32
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36 | #define VOLUME_ID_PARTITIONS_MAX 256
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37 |
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38 | enum volume_id_usage {
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39 | VOLUME_ID_UNUSED,
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40 | VOLUME_ID_UNPROBED,
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41 | VOLUME_ID_OTHER,
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42 | VOLUME_ID_FILESYSTEM,
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43 | VOLUME_ID_PARTITIONTABLE,
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44 | VOLUME_ID_RAID,
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45 | VOLUME_ID_DISKLABEL,
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46 | VOLUME_ID_CRYPTO,
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47 | };
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48 |
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49 | #ifdef UNUSED_PARTITION_CODE
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50 | struct volume_id_partition {
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51 | // const char *type;
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52 | // const char *usage;
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53 | // smallint usage_id;
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54 | // uint8_t pt_type_raw;
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55 | // uint64_t pt_off;
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56 | // uint64_t pt_len;
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57 | };
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58 | #endif
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59 |
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60 | struct volume_id {
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61 | int fd;
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62 | // int fd_close:1;
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63 | int error;
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64 | size_t sbbuf_len;
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65 | size_t seekbuf_len;
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66 | uint8_t *sbbuf;
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67 | uint8_t *seekbuf;
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68 | uint64_t seekbuf_off;
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69 | #ifdef UNUSED_PARTITION_CODE
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70 | struct volume_id_partition *partitions;
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71 | size_t partition_count;
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72 | #endif
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73 | // uint8_t label_raw[VOLUME_ID_LABEL_SIZE];
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74 | // size_t label_raw_len;
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75 | char label[VOLUME_ID_LABEL_SIZE+1];
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76 | // uint8_t uuid_raw[VOLUME_ID_UUID_SIZE];
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77 | // size_t uuid_raw_len;
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78 | /* uuid is stored in ASCII (not binary) form here: */
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79 | char uuid[VOLUME_ID_UUID_SIZE+1];
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80 | // char type_version[VOLUME_ID_FORMAT_SIZE];
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81 | // smallint usage_id;
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82 | // const char *usage;
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83 | #if ENABLE_FEATURE_BLKID_TYPE
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84 | const char *type;
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85 | #endif
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86 | };
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87 |
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88 | struct volume_id* FAST_FUNC volume_id_open_node(int fd);
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89 | int FAST_FUNC volume_id_probe_all(struct volume_id *id, /*uint64_t off,*/ uint64_t size);
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90 | void FAST_FUNC free_volume_id(struct volume_id *id);
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91 |
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92 | /* util.h */
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93 |
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94 | /* size of superblock buffer, reiserfs block is at 64k */
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95 | #define SB_BUFFER_SIZE 0x11000
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96 | /* size of seek buffer, FAT cluster is 32k max */
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97 | #define SEEK_BUFFER_SIZE 0x10000
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98 |
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99 | #define bswap16(x) (uint16_t) ( \
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100 | (((uint16_t)(x) & 0x00ffu) << 8) | \
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101 | (((uint16_t)(x) & 0xff00u) >> 8))
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102 |
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103 | #define bswap32(x) (uint32_t) ( \
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104 | (((uint32_t)(x) & 0xff000000u) >> 24) | \
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105 | (((uint32_t)(x) & 0x00ff0000u) >> 8) | \
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106 | (((uint32_t)(x) & 0x0000ff00u) << 8) | \
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107 | (((uint32_t)(x) & 0x000000ffu) << 24))
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108 |
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109 | #define bswap64(x) (uint64_t) ( \
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110 | (((uint64_t)(x) & 0xff00000000000000ull) >> 56) | \
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111 | (((uint64_t)(x) & 0x00ff000000000000ull) >> 40) | \
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112 | (((uint64_t)(x) & 0x0000ff0000000000ull) >> 24) | \
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113 | (((uint64_t)(x) & 0x000000ff00000000ull) >> 8) | \
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114 | (((uint64_t)(x) & 0x00000000ff000000ull) << 8) | \
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115 | (((uint64_t)(x) & 0x0000000000ff0000ull) << 24) | \
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116 | (((uint64_t)(x) & 0x000000000000ff00ull) << 40) | \
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117 | (((uint64_t)(x) & 0x00000000000000ffull) << 56))
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118 |
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119 | #if BB_LITTLE_ENDIAN
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120 | #define le16_to_cpu(x) (x)
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121 | #define le32_to_cpu(x) (x)
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122 | #define le64_to_cpu(x) (x)
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123 | #define be16_to_cpu(x) bswap16(x)
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124 | #define be32_to_cpu(x) bswap32(x)
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125 | #define cpu_to_le16(x) (x)
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126 | #define cpu_to_le32(x) (x)
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127 | #define cpu_to_be32(x) bswap32(x)
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128 | #else
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129 | #define le16_to_cpu(x) bswap16(x)
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130 | #define le32_to_cpu(x) bswap32(x)
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131 | #define le64_to_cpu(x) bswap64(x)
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132 | #define be16_to_cpu(x) (x)
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133 | #define be32_to_cpu(x) (x)
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134 | #define cpu_to_le16(x) bswap16(x)
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135 | #define cpu_to_le32(x) bswap32(x)
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136 | #define cpu_to_be32(x) (x)
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137 | #endif
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138 |
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139 | /* volume_id_set_uuid(id,buf,fmt) assumes size of uuid buf
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140 | * by shifting: 4 << fmt, except for fmt == UUID_DCE_STRING.
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141 | * The constants below should match sizes.
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142 | */
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143 | enum uuid_format {
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144 | UUID_DOS = 0, /* 4 bytes */
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145 | UUID_NTFS = 1, /* 8 bytes */
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146 | UUID_DCE = 2, /* 16 bytes */
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147 | UUID_DCE_STRING = 3, /* 36 bytes (VOLUME_ID_UUID_SIZE) */
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148 | };
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149 |
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150 | enum endian {
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151 | LE = 0,
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152 | BE = 1
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153 | };
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154 |
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155 | void volume_id_set_unicode16(char *str, size_t len, const uint8_t *buf, enum endian endianess, size_t count);
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156 | //void volume_id_set_usage(struct volume_id *id, enum volume_id_usage usage_id);
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157 | //void volume_id_set_usage_part(struct volume_id_partition *part, enum volume_id_usage usage_id);
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158 | //void volume_id_set_label_raw(struct volume_id *id, const uint8_t *buf, size_t count);
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159 | void volume_id_set_label_string(struct volume_id *id, const uint8_t *buf, size_t count);
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160 | void volume_id_set_label_unicode16(struct volume_id *id, const uint8_t *buf, enum endian endianess, size_t count);
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161 | void volume_id_set_uuid(struct volume_id *id, const uint8_t *buf, enum uuid_format format);
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162 | void *volume_id_get_buffer(struct volume_id *id, uint64_t off, size_t len);
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163 | void volume_id_free_buffer(struct volume_id *id);
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164 |
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165 |
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166 | /* Probe routines */
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167 |
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168 | /* RAID */
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169 |
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170 | //int FAST_FUNC volume_id_probe_highpoint_37x_raid(struct volume_id *id /*,uint64_t off*/);
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171 | //int FAST_FUNC volume_id_probe_highpoint_45x_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size);
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172 |
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173 | //int FAST_FUNC volume_id_probe_intel_software_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size);
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174 |
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175 | int FAST_FUNC volume_id_probe_linux_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size);
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176 |
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177 | //int FAST_FUNC volume_id_probe_lsi_mega_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size);
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178 |
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179 | //int FAST_FUNC volume_id_probe_nvidia_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size);
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180 |
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181 | //int FAST_FUNC volume_id_probe_promise_fasttrack_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size);
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182 |
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183 | //int FAST_FUNC volume_id_probe_silicon_medley_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size);
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184 |
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185 | //int FAST_FUNC volume_id_probe_via_raid(struct volume_id *id /*,uint64_t off*/, uint64_t size);
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186 |
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187 | //int FAST_FUNC volume_id_probe_lvm1(struct volume_id *id /*,uint64_t off*/);
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188 | //int FAST_FUNC volume_id_probe_lvm2(struct volume_id *id /*,uint64_t off*/);
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189 |
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190 | /* FS */
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191 |
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192 | int FAST_FUNC volume_id_probe_btrfs(struct volume_id *id /*,uint64_t off*/);
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193 |
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194 | int FAST_FUNC volume_id_probe_cramfs(struct volume_id *id /*,uint64_t off*/);
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195 |
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196 | int FAST_FUNC volume_id_probe_ext(struct volume_id *id /*,uint64_t off*/);
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197 |
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198 | int FAST_FUNC volume_id_probe_vfat(struct volume_id *id /*,uint64_t off*/);
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199 |
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200 | int FAST_FUNC volume_id_probe_hfs_hfsplus(struct volume_id *id /*,uint64_t off*/);
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201 |
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202 | //int FAST_FUNC volume_id_probe_hpfs(struct volume_id *id /*,uint64_t off*/);
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203 |
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204 | int FAST_FUNC volume_id_probe_iso9660(struct volume_id *id /*,uint64_t off*/);
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205 |
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206 | int FAST_FUNC volume_id_probe_jfs(struct volume_id *id /*,uint64_t off*/);
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207 |
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208 | int FAST_FUNC volume_id_probe_linux_swap(struct volume_id *id /*,uint64_t off*/);
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209 |
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210 | int FAST_FUNC volume_id_probe_luks(struct volume_id *id /*,uint64_t off*/);
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211 |
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212 | //int FAST_FUNC volume_id_probe_mac_partition_map(struct volume_id *id /*,uint64_t off*/);
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213 |
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214 | //int FAST_FUNC volume_id_probe_minix(struct volume_id *id /*,uint64_t off*/);
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215 |
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216 | //int FAST_FUNC volume_id_probe_msdos_part_table(struct volume_id *id /*,uint64_t off*/);
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217 |
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218 | int FAST_FUNC volume_id_probe_nilfs(struct volume_id *id /*,uint64_t off*/);
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219 |
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220 | int FAST_FUNC volume_id_probe_ntfs(struct volume_id *id /*,uint64_t off*/);
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221 |
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222 | int FAST_FUNC volume_id_probe_exfat(struct volume_id *id /*,uint64_t off*/);
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223 |
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224 | int FAST_FUNC volume_id_probe_ocfs2(struct volume_id *id /*,uint64_t off*/);
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225 |
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226 | int FAST_FUNC volume_id_probe_reiserfs(struct volume_id *id /*,uint64_t off*/);
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227 |
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228 | int FAST_FUNC volume_id_probe_romfs(struct volume_id *id /*,uint64_t off*/);
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229 |
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230 | int FAST_FUNC volume_id_probe_squashfs(struct volume_id *id /*,uint64_t off*/);
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231 |
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232 | int FAST_FUNC volume_id_probe_sysv(struct volume_id *id /*,uint64_t off*/);
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233 |
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234 | int FAST_FUNC volume_id_probe_udf(struct volume_id *id /*,uint64_t off*/);
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235 |
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236 | //int FAST_FUNC volume_id_probe_ufs(struct volume_id *id /*,uint64_t off*/);
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237 |
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238 | int FAST_FUNC volume_id_probe_xfs(struct volume_id *id /*,uint64_t off*/);
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239 |
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240 | POP_SAVED_FUNCTION_VISIBILITY
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