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Rev | Author | Line No. | Line |
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6462 | pathoswith | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2013-2016. All rights reserved. ;; |
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4 | ;; Distributed under terms of the GNU General Public License. ;; |
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5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 6859 $ |
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9 | |||
10 | ; EXT external functions |
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11 | ; in: |
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12 | ; ebx -> parameter structure of sysfunc 70 |
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13 | ; ebp -> EXTFS structure |
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6471 | pathoswith | 14 | ; esi -> path string in UTF-8 |
6462 | pathoswith | 15 | ; out: |
16 | ; eax, ebx = return values for sysfunc 70 |
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17 | iglobal |
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18 | align 4 |
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19 | ext_user_functions: |
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20 | dd ext_free |
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21 | dd (ext_user_functions_end - ext_user_functions - 4) / 4 |
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22 | dd ext_ReadFile |
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23 | dd ext_ReadFolder |
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24 | dd ext_CreateFile |
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25 | dd ext_WriteFile |
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26 | dd ext_SetFileEnd |
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27 | dd ext_GetFileInfo |
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28 | dd ext_SetFileInfo |
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29 | dd 0 |
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30 | dd ext_Delete |
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31 | dd ext_CreateFolder |
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32 | ext_user_functions_end: |
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33 | endg |
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34 | |||
35 | struct DIRENTRY |
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36 | inodeNumber dd ? |
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37 | entryLength dw ? |
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38 | nameLength db ? |
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39 | fileType db ? |
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40 | name db ? ; rb [nameLength] |
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41 | ends |
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42 | |||
43 | struct INODE |
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44 | accessMode dw ? |
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45 | UID dw ? |
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46 | fileSize dd ? |
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47 | accessedTime dd ? |
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48 | inodeModified dd ? |
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49 | dataModified dd ? |
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50 | deletedTime dd ? |
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51 | GID dw ? |
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52 | linksCount dw ? |
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53 | sectorsUsed dd ? |
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54 | featureFlags dd ? |
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55 | reserved dd ? |
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56 | blockNumbers rd 12 |
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57 | addressBlock dd ? |
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58 | doubleAddress dd ? |
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59 | tripleAddress dd ? |
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60 | generation dd ? |
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61 | ACL dd ? |
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62 | fileSizeHigh dd ? |
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63 | ends |
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64 | |||
65 | struct BGDESCR ; block group descriptor |
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66 | blockBitmap dd ? |
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67 | inodeBitmap dd ? |
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68 | inodeTable dd ? |
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69 | blocksFree dw ? |
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70 | inodesFree dw ? |
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71 | directoriesCount dw ? |
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72 | reserved rb 14 |
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73 | ends |
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74 | |||
75 | struct SUPERBLOCK |
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76 | inodesTotal dd ? |
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77 | blocksTotal dd ? |
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78 | blocksReserved dd ? |
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79 | blocksFree dd ? |
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80 | inodesFree dd ? |
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81 | firstGroupBlock dd ? |
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82 | sectorsPerBlockLog dd ? ; shift for 1024 |
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83 | fragmentSizeLog dd ? |
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84 | blocksPerGroup dd ? |
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85 | fragmentsPerGroup dd ? |
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86 | inodesPerGroup dd ? |
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87 | lastMountTime dd ? |
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88 | lastWriteTime dd ? |
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89 | mountCount dw ? |
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90 | mountMax dw ? |
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91 | magic dw ? |
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92 | state dw ? |
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93 | errorHandling dw ? |
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94 | additionalVersion dw ? |
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95 | lastCheck dd ? |
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96 | checkInterval dd ? |
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97 | creatorOS dd ? |
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98 | dynamicVersionFlag dd ? |
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99 | reservedUID dw ? |
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100 | reservedGID dw ? |
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101 | firstInode dd ? |
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102 | inodeSize dw ? |
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103 | thisBlockGroup dw ? |
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104 | compatibleFlags dd ? |
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105 | incompatibleFlags dd ? |
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106 | RO_compatibleFlags dd ? |
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107 | ends |
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108 | |||
109 | ; ext4 extent tree |
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110 | struct NODEHEADER ; tree node header |
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111 | magic dw ? ; 0xF30A |
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112 | entriesFolow dw ? |
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113 | entriesMax dw ? |
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114 | currentDepth dw ? |
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115 | generation dd ? |
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116 | ends |
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117 | |||
118 | struct INDEX ; root/branch |
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119 | fileBlock dd ? |
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120 | nodeBlock dd ? |
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121 | nodeBlockHigh dw ? |
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122 | reserved dw ? |
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123 | ends |
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124 | |||
125 | struct EXTENT ; leaf |
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126 | fileBlock dd ? |
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127 | blocksCount dw ? |
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128 | fsBlockHigh dw ? |
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129 | fsBlock dd ? |
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130 | ends |
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131 | |||
132 | ROOT_INODE = 2 |
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133 | PERMISSIONS = 110110110b |
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134 | EXTENTS_USED = 80000h |
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135 | TYPE_MASK = 0F000h |
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136 | FLAG_FILE = 8000h |
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137 | DIRECTORY = 4000h |
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138 | DIR_FLAG_FILE = 1 |
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139 | DIR_DIRECTORY = 2 |
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140 | KOS_HIDDEN = 2 |
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141 | KOS_DIRECTORY = 10h |
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142 | READ_ONLY = 1 |
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143 | |||
144 | ; Implemented "incompatible" features: |
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145 | ; 2 = have file type in directory entry |
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146 | ; 40h = extents |
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147 | ; 200h = flexible block groups |
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148 | INCOMPATIBLE_SUPPORT = 242h |
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149 | ; Read only support for "incompatible" features: |
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150 | INCOMPATIBLE_READ_SUPPORT = 240h |
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151 | |||
152 | ; Implemented "read-only" features: |
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153 | ; 1 = sparse superblock |
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154 | ; 2 = 64-bit file size |
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155 | READ_ONLY_SUPPORT = 3 |
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156 | |||
157 | struct EXTFS PARTITION |
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158 | Lock MUTEX |
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159 | mountType dd ? |
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160 | bytesPerBlock dd ? |
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161 | sectorsPerBlock dd ? |
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162 | dwordsPerBlock dd ? |
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163 | dwordsPerBranch dd ? ; dwordsPerBlock ^ 2 |
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164 | mainBlockBuffer dd ? |
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165 | tempBlockBuffer dd ? |
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6848 | pathoswith | 166 | descriptorTable dd ? |
167 | descriptorTableEnd dd ? |
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6558 | pathoswith | 168 | align0 rb 200h-EXTFS.align0 |
6462 | pathoswith | 169 | superblock SUPERBLOCK |
6558 | pathoswith | 170 | align1 rb 400h-EXTFS.align1 |
6462 | pathoswith | 171 | rootInodeBuffer INODE |
6558 | pathoswith | 172 | align2 rb 600h-EXTFS.align2 |
173 | inodeBuffer INODE |
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174 | align3 rb 800h-EXTFS.align3 |
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6462 | pathoswith | 175 | ends |
176 | |||
177 | ; mount if it's a valid EXT partition |
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178 | ext2_create_partition: |
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179 | ; in: |
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180 | ; ebp -> PARTITION structure |
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181 | ; ebx -> boot sector |
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182 | ; ebx+512 -> buffer |
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183 | ; out: |
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184 | ; eax -> EXTFS structure, 0 = not EXT |
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185 | push ebx |
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186 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
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187 | jnz .fail |
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188 | mov eax, 2 |
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189 | add ebx, 512 |
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190 | call fs_read32_sys |
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191 | test eax, eax |
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192 | jnz .fail |
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193 | cmp [ebx+SUPERBLOCK.magic], 0xEF53 |
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194 | jne .fail |
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195 | cmp [ebx+SUPERBLOCK.state], 1 |
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6471 | pathoswith | 196 | ja .fail |
6462 | pathoswith | 197 | test [ebx+SUPERBLOCK.incompatibleFlags], not INCOMPATIBLE_SUPPORT |
198 | jnz .fail |
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199 | cmp [ebx+SUPERBLOCK.sectorsPerBlockLog], 6 ; 64KB |
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200 | ja .fail |
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6852 | pathoswith | 201 | cmp [ebx+SUPERBLOCK.inodeSize], 512 |
6462 | pathoswith | 202 | ja .fail |
203 | cmp [ebx+SUPERBLOCK.blocksPerGroup], 0 |
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204 | je .fail |
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205 | cmp [ebx+SUPERBLOCK.inodesPerGroup], 0 |
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206 | je .fail |
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6558 | pathoswith | 207 | movi eax, sizeof.EXTFS |
208 | call malloc |
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6462 | pathoswith | 209 | test eax, eax |
210 | jz .fail |
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211 | mov ecx, dword [ebp+PARTITION.FirstSector] |
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212 | mov dword [eax+EXTFS.FirstSector], ecx |
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213 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
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214 | mov dword [eax+EXTFS.FirstSector+4], ecx |
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215 | mov ecx, dword [ebp+PARTITION.Length] |
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216 | mov dword [eax+EXTFS.Length], ecx |
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217 | mov ecx, dword [ebp+PARTITION.Length+4] |
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218 | mov dword [eax+EXTFS.Length+4], ecx |
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219 | mov ecx, [ebp+PARTITION.Disk] |
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220 | mov [eax+EXTFS.Disk], ecx |
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221 | mov [eax+EXTFS.FSUserFunctions], ext_user_functions |
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222 | |||
223 | push ebp esi edi |
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224 | mov ebp, eax |
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225 | lea ecx, [eax+EXTFS.Lock] |
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226 | call mutex_init |
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227 | mov esi, ebx |
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228 | lea edi, [ebp+EXTFS.superblock] |
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229 | mov ecx, 512/4 |
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230 | rep movsd ; copy superblock |
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231 | mov ecx, [ebx+SUPERBLOCK.sectorsPerBlockLog] |
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232 | inc ecx |
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233 | mov eax, 1 |
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234 | shl eax, cl |
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235 | mov [ebp+EXTFS.sectorsPerBlock], eax |
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236 | shl eax, 9 |
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237 | mov [ebp+EXTFS.bytesPerBlock], eax |
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238 | shl eax, 1 |
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239 | push eax |
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240 | shr eax, 3 |
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241 | mov [ebp+EXTFS.dwordsPerBlock], eax |
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242 | mul eax |
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243 | mov [ebp+EXTFS.dwordsPerBranch], eax |
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244 | call kernel_alloc |
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245 | test eax, eax |
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246 | jz .error |
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247 | mov [ebp+EXTFS.mainBlockBuffer], eax |
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248 | add eax, [ebp+EXTFS.bytesPerBlock] |
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249 | mov [ebp+EXTFS.tempBlockBuffer], eax |
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250 | mov [ebp+EXTFS.mountType], 0 |
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251 | test [ebx+SUPERBLOCK.RO_compatibleFlags], not READ_ONLY_SUPPORT |
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252 | jnz .read_only |
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253 | test [ebx+SUPERBLOCK.incompatibleFlags], INCOMPATIBLE_READ_SUPPORT |
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254 | jz @f |
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255 | .read_only: |
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256 | or [ebp+EXTFS.mountType], READ_ONLY |
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6848 | pathoswith | 257 | @@: |
258 | mov eax, [ebx+SUPERBLOCK.inodesTotal] |
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259 | dec eax |
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260 | xor edx, edx |
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261 | div [ebx+SUPERBLOCK.inodesPerGroup] |
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262 | inc eax |
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263 | shl eax, 5 |
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264 | push eax eax |
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265 | call kernel_alloc |
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266 | pop ecx |
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267 | test eax, eax |
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268 | jz .error2 |
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269 | mov [ebp+EXTFS.descriptorTable], eax |
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270 | mov ebx, eax |
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271 | add eax, ecx |
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272 | mov [ebp+EXTFS.descriptorTableEnd], eax |
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273 | mov eax, [ebp+EXTFS.superblock.firstGroupBlock] |
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274 | inc eax |
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275 | mul [ebp+EXTFS.sectorsPerBlock] |
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276 | dec ecx |
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277 | shr ecx, 9 |
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278 | inc ecx |
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279 | call fs_read64_sys |
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280 | test eax, eax |
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281 | jnz @f |
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282 | mov al, ROOT_INODE |
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6462 | pathoswith | 283 | lea ebx, [ebp+EXTFS.rootInodeBuffer] |
284 | call readInode |
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285 | test eax, eax |
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286 | jnz @f |
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287 | mov eax, ebp |
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288 | pop edi esi ebp ebx |
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289 | ret |
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290 | |||
291 | @@: |
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6848 | pathoswith | 292 | stdcall kernel_free, [ebp+EXTFS.descriptorTable] |
293 | .error2: |
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6462 | pathoswith | 294 | stdcall kernel_free, [ebp+EXTFS.mainBlockBuffer] |
295 | .error: |
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6558 | pathoswith | 296 | mov eax, ebp |
297 | call free |
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6462 | pathoswith | 298 | pop edi esi ebp |
299 | .fail: |
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300 | pop ebx |
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301 | xor eax, eax |
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302 | ret |
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303 | |||
304 | ; unmount EXT partition |
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305 | ext_free: |
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306 | ; in: eax -> EXTFS structure |
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6848 | pathoswith | 307 | push eax [eax+EXTFS.mainBlockBuffer] |
308 | stdcall kernel_free, [eax+EXTFS.descriptorTable] |
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309 | call kernel_free |
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6558 | pathoswith | 310 | pop eax |
311 | jmp free |
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6462 | pathoswith | 312 | |
313 | extfsWriteBlock: |
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314 | push fs_write64_sys |
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315 | jmp @f |
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6575 | pathoswith | 316 | ; in: eax = block number, ebx -> buffer |
6462 | pathoswith | 317 | extfsReadBlock: |
318 | push fs_read64_sys |
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319 | @@: |
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320 | push ecx edx |
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321 | mov ecx, [ebp+EXTFS.sectorsPerBlock] |
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322 | mul ecx |
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323 | call dword[esp+8] |
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324 | pop edx ecx |
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325 | add esp, 4 |
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326 | test eax, eax |
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327 | jz @f |
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328 | movi eax, ERROR_DEVICE |
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329 | stc |
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330 | @@: |
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331 | ret |
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332 | |||
333 | extfsWriteDescriptor: |
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6848 | pathoswith | 334 | ; in: ebx = block group descriptor |
335 | mov eax, [ebp+EXTFS.superblock.firstGroupBlock] |
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336 | inc eax |
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337 | mul [ebp+EXTFS.sectorsPerBlock] |
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338 | sub ebx, [ebp+EXTFS.descriptorTable] |
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339 | shr ebx, 9 |
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340 | add eax, ebx |
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341 | shl ebx, 9 |
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342 | add ebx, [ebp+EXTFS.descriptorTable] |
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6756 | pathoswith | 343 | call fs_write32_sys |
6462 | pathoswith | 344 | ret |
345 | |||
6756 | pathoswith | 346 | extfsExtentFree: |
347 | ; in: eax = first block number, ecx = extent size |
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348 | push ebx edx edi |
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6462 | pathoswith | 349 | sub eax, [ebp+EXTFS.superblock.firstGroupBlock] |
350 | xor edx, edx |
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6756 | pathoswith | 351 | mov ebx, [ebp+EXTFS.superblock.blocksPerGroup] |
352 | div ebx |
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353 | sub ebx, edx |
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354 | sub ebx, ecx |
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355 | jc .ret |
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6848 | pathoswith | 356 | push edx |
357 | mov ebx, [ebp+EXTFS.descriptorTable] |
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358 | shl eax, 5 |
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359 | add ebx, eax |
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360 | mov eax, ecx |
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361 | mul [ebp+EXTFS.sectorsPerBlock] |
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6756 | pathoswith | 362 | add [ebx+BGDESCR.blocksFree], cx |
6848 | pathoswith | 363 | add [ebp+EXTFS.superblock.blocksFree], ecx |
364 | sub [ebp+EXTFS.inodeBuffer.sectorsUsed], eax |
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365 | push [ebx+BGDESCR.blockBitmap] |
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366 | call extfsWriteDescriptor |
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6575 | pathoswith | 367 | pop eax |
368 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
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6848 | pathoswith | 369 | mov edx, eax |
6462 | pathoswith | 370 | call extfsReadBlock |
371 | pop eax |
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6848 | pathoswith | 372 | jc .ret |
373 | push ebx edx |
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6756 | pathoswith | 374 | mov edi, eax |
375 | shr edi, 5 |
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376 | shl edi, 2 |
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377 | add edi, ebx |
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6774 | pathoswith | 378 | mov edx, ecx |
6756 | pathoswith | 379 | and eax, 31 |
6774 | pathoswith | 380 | jz .aligned |
6756 | pathoswith | 381 | mov ecx, 32 |
382 | sub ecx, eax |
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383 | sub edx, ecx |
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384 | jnc @f |
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385 | add ecx, edx |
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386 | xor edx, edx |
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387 | @@: |
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388 | or ebx, -1 |
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389 | shl ebx, cl |
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390 | not ebx |
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391 | mov ecx, eax |
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392 | shl ebx, cl |
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393 | not ebx |
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394 | and [edi], ebx |
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6774 | pathoswith | 395 | add edi, 4 |
396 | xor eax, eax |
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397 | .aligned: |
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6756 | pathoswith | 398 | mov ecx, edx |
399 | shr ecx, 5 |
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400 | rep stosd |
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6462 | pathoswith | 401 | and edx, 31 |
6774 | pathoswith | 402 | jz @f |
6756 | pathoswith | 403 | mov ecx, edx |
404 | not eax |
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405 | shl eax, cl |
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406 | and [edi], eax |
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407 | @@: |
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408 | pop eax ebx |
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6462 | pathoswith | 409 | call extfsWriteBlock |
6756 | pathoswith | 410 | .ret: |
411 | pop edi edx ebx |
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6643 | pathoswith | 412 | xor eax, eax |
6462 | pathoswith | 413 | ret |
414 | |||
6643 | pathoswith | 415 | extfsInodeAlloc: |
416 | ; in: eax = parent inode number |
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417 | ; out: ebx = allocated inode number |
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6848 | pathoswith | 418 | push ecx edx edi |
6462 | pathoswith | 419 | dec eax |
420 | xor edx, edx |
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421 | div [ebp+EXTFS.superblock.inodesPerGroup] |
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6848 | pathoswith | 422 | mov ebx, [ebp+EXTFS.descriptorTable] |
423 | shl eax, 5 |
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424 | add ebx, eax |
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425 | push ebx |
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6462 | pathoswith | 426 | .test_block_group: |
6848 | pathoswith | 427 | push ebx |
6774 | pathoswith | 428 | cmp [ebx+BGDESCR.blocksFree], 0 |
429 | jz .next |
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6848 | pathoswith | 430 | cmp [ebx+BGDESCR.inodesFree], 0 |
431 | jz .next |
||
6756 | pathoswith | 432 | dec [ebx+BGDESCR.inodesFree] |
6848 | pathoswith | 433 | dec [ebp+EXTFS.superblock.inodesFree] |
434 | push [ebx+BGDESCR.inodeBitmap] |
||
6575 | pathoswith | 435 | call extfsWriteDescriptor |
6848 | pathoswith | 436 | pop eax |
6575 | pathoswith | 437 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
6848 | pathoswith | 438 | mov edx, eax |
6462 | pathoswith | 439 | mov edi, ebx |
440 | call extfsReadBlock |
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441 | jc .fail |
||
6643 | pathoswith | 442 | mov ecx, [ebp+EXTFS.superblock.inodesPerGroup] |
6462 | pathoswith | 443 | or eax, -1 |
444 | shr ecx, 5 |
||
445 | repz scasd |
||
446 | jz .next |
||
447 | sub edi, 4 |
||
448 | mov eax, [edi] |
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449 | not eax |
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450 | bsf eax, eax |
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451 | bts [edi], eax |
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6575 | pathoswith | 452 | sub edi, [ebp+EXTFS.tempBlockBuffer] |
6462 | pathoswith | 453 | shl edi, 3 |
454 | add eax, edi |
||
455 | mov ecx, eax |
||
456 | mov eax, edx |
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457 | call extfsWriteBlock |
||
6575 | pathoswith | 458 | pop eax |
6848 | pathoswith | 459 | sub eax, [ebp+EXTFS.descriptorTable] |
460 | shr eax, 5 |
||
6643 | pathoswith | 461 | mul [ebp+EXTFS.superblock.inodesPerGroup] |
6756 | pathoswith | 462 | lea ebx, [eax+ecx+1] |
6575 | pathoswith | 463 | xor eax, eax |
6756 | pathoswith | 464 | .ret: |
6848 | pathoswith | 465 | pop edi edi edx ecx |
6462 | pathoswith | 466 | ret |
467 | |||
6848 | pathoswith | 468 | .next: ; search forward, then backward |
469 | pop ebx |
||
470 | cmp ebx, [esp] |
||
471 | jc .backward |
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472 | add ebx, 32 |
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473 | cmp ebx, [ebp+EXTFS.descriptorTableEnd] |
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474 | jc .test_block_group |
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475 | mov ebx, [esp] |
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6462 | pathoswith | 476 | .backward: |
6848 | pathoswith | 477 | sub ebx, 32 |
478 | cmp ebx, [ebp+EXTFS.descriptorTable] |
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6756 | pathoswith | 479 | jnc .test_block_group |
480 | movi eax, ERROR_DISK_FULL |
||
6848 | pathoswith | 481 | push eax |
6756 | pathoswith | 482 | .fail: |
483 | pop edi |
||
484 | jmp .ret |
||
6462 | pathoswith | 485 | |
6643 | pathoswith | 486 | extfsExtentAlloc: |
6756 | pathoswith | 487 | ; in: eax = parent inode number, ecx = blocks max |
488 | ; out: ebx = first block number, ecx = blocks allocated |
||
6643 | pathoswith | 489 | push edx esi edi ecx |
490 | dec eax |
||
491 | xor edx, edx |
||
492 | div [ebp+EXTFS.superblock.inodesPerGroup] |
||
6848 | pathoswith | 493 | mov ebx, [ebp+EXTFS.descriptorTable] |
494 | shl eax, 5 |
||
495 | add ebx, eax |
||
496 | push ebx |
||
6643 | pathoswith | 497 | .test_block_group: |
6848 | pathoswith | 498 | push ebx |
499 | cmp [ebx+BGDESCR.blocksFree], 0 |
||
500 | jz .next |
||
6756 | pathoswith | 501 | mov eax, [ebx+BGDESCR.blockBitmap] |
6643 | pathoswith | 502 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
503 | mov edx, eax |
||
504 | mov edi, ebx |
||
505 | call extfsReadBlock |
||
506 | jc .fail |
||
507 | mov ecx, [ebp+EXTFS.superblock.blocksPerGroup] |
||
508 | shr ecx, 5 |
||
509 | or eax, -1 |
||
510 | repz scasd |
||
511 | jz .next |
||
512 | mov esi, edi |
||
513 | sub esi, 4 |
||
514 | push edx ecx |
||
515 | mov eax, [esi] |
||
516 | not eax |
||
517 | bsf ecx, eax |
||
518 | not eax |
||
519 | shr eax, cl |
||
520 | shl eax, cl |
||
6774 | pathoswith | 521 | mov ebx, 32 |
6756 | pathoswith | 522 | bsf ebx, eax |
6643 | pathoswith | 523 | sub ebx, ecx |
524 | mov eax, [esp+16] |
||
525 | cmp ebx, eax |
||
526 | jc @f |
||
527 | mov ebx, eax |
||
528 | @@: |
||
6774 | pathoswith | 529 | or eax, -1 |
530 | cmp ebx, 32 |
||
531 | jz @f |
||
6643 | pathoswith | 532 | xchg ebx, ecx |
533 | shl eax, cl |
||
534 | not eax |
||
535 | xchg ebx, ecx |
||
536 | shl eax, cl |
||
6774 | pathoswith | 537 | @@: |
6643 | pathoswith | 538 | or [esi], eax |
539 | sub esi, [ebp+EXTFS.tempBlockBuffer] |
||
540 | shl esi, 3 |
||
541 | add esi, ecx |
||
542 | mov eax, [esp+16] |
||
543 | sub eax, ebx |
||
544 | mov [esp+16], ebx |
||
545 | add ebx, ecx |
||
546 | pop ecx |
||
547 | test eax, eax |
||
548 | jz .done |
||
549 | cmp ebx, 32 |
||
550 | jnz .done |
||
551 | jecxz .done |
||
552 | mov ebx, eax |
||
553 | shr eax, 5 |
||
554 | inc eax |
||
555 | and ebx, 31 |
||
556 | cmp ecx, eax |
||
557 | jnc @f |
||
558 | mov eax, ecx |
||
559 | mov bl, 32 |
||
560 | @@: |
||
561 | mov ecx, eax |
||
562 | shl eax, 5 |
||
563 | add [esp+12], eax |
||
564 | xor eax, eax |
||
565 | push edi |
||
566 | repz scasd |
||
567 | jz @f |
||
568 | mov eax, [edi-4] |
||
569 | bsf eax, eax |
||
570 | xchg eax, ebx |
||
571 | test ecx, ecx |
||
572 | jnz @f |
||
573 | cmp ebx, eax |
||
574 | jc @f |
||
575 | mov ebx, eax |
||
576 | @@: |
||
577 | inc ecx |
||
578 | shl ecx, 5 |
||
579 | sub ecx, ebx |
||
580 | sub [esp+16], ecx |
||
581 | mov ecx, edi |
||
582 | pop edi |
||
583 | sub ecx, edi |
||
584 | shr ecx, 2 |
||
585 | dec ecx |
||
586 | or eax, -1 |
||
587 | rep stosd |
||
588 | mov ecx, ebx |
||
6859 | pathoswith | 589 | jecxz .done |
6774 | pathoswith | 590 | neg ecx |
591 | add ecx, 32 |
||
592 | shr eax, cl |
||
6643 | pathoswith | 593 | or [edi], eax |
594 | .done: |
||
595 | pop eax |
||
596 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
597 | call extfsWriteBlock |
||
6848 | pathoswith | 598 | mov ebx, [esp] |
6643 | pathoswith | 599 | mov ecx, [esp+8] |
6756 | pathoswith | 600 | sub [ebx+BGDESCR.blocksFree], cx |
6848 | pathoswith | 601 | jnc @f |
602 | mov [ebx+BGDESCR.blocksFree], 0 |
||
603 | @@: |
||
6643 | pathoswith | 604 | sub [ebp+EXTFS.superblock.blocksFree], ecx |
605 | call extfsWriteDescriptor |
||
606 | pop eax ebx |
||
6848 | pathoswith | 607 | sub eax, [ebp+EXTFS.descriptorTable] |
608 | shr eax, 5 |
||
6643 | pathoswith | 609 | mul [ebp+EXTFS.superblock.blocksPerGroup] |
610 | mov ebx, eax |
||
611 | add ebx, esi |
||
6756 | pathoswith | 612 | add ebx, [ebp+EXTFS.superblock.firstGroupBlock] |
613 | pop ecx |
||
614 | mov eax, ecx |
||
615 | mul [ebp+EXTFS.sectorsPerBlock] |
||
616 | add [ebp+EXTFS.inodeBuffer.sectorsUsed], eax |
||
6643 | pathoswith | 617 | xor eax, eax |
618 | .ret: |
||
619 | pop edi esi edx |
||
620 | ret |
||
621 | |||
622 | .next: ; search forward, then backward |
||
6848 | pathoswith | 623 | pop ebx |
624 | cmp ebx, [esp] |
||
6643 | pathoswith | 625 | jc .backward |
6848 | pathoswith | 626 | add ebx, 32 |
627 | cmp ebx, [ebp+EXTFS.descriptorTableEnd] |
||
628 | jc .test_block_group |
||
629 | mov ebx, [esp] |
||
6643 | pathoswith | 630 | .backward: |
6848 | pathoswith | 631 | sub ebx, 32 |
632 | cmp ebx, [ebp+EXTFS.descriptorTable] |
||
633 | jnc .test_block_group |
||
634 | movi eax, ERROR_DISK_FULL |
||
6643 | pathoswith | 635 | push eax |
6756 | pathoswith | 636 | .fail: |
637 | add esp, 12 |
||
6643 | pathoswith | 638 | xor ecx, ecx |
6756 | pathoswith | 639 | stc |
6643 | pathoswith | 640 | jmp .ret |
641 | |||
6726 | pathoswith | 642 | extfsGetExtent: |
643 | ; in: ecx = starting file block |
||
644 | ; out: eax = first block number, ecx = extent size |
||
645 | push ebx edx esi |
||
646 | lea esi, [ebp+EXTFS.inodeBuffer] |
||
6462 | pathoswith | 647 | test [esi+INODE.featureFlags], EXTENTS_USED |
648 | jz .listTreeSearch |
||
649 | add esi, INODE.blockNumbers |
||
650 | .extentTreeSearch: |
||
651 | cmp word [esi+NODEHEADER.magic], 0xF30A |
||
652 | jne .fail |
||
653 | movzx ebx, [esi+NODEHEADER.entriesFolow] |
||
654 | add esi, sizeof.NODEHEADER |
||
6726 | pathoswith | 655 | test ebx, ebx |
656 | jz .noBlock |
||
6462 | pathoswith | 657 | cmp word [esi-sizeof.NODEHEADER+NODEHEADER.currentDepth], 0 |
658 | je .leaf_block |
||
6726 | pathoswith | 659 | dec ebx |
660 | jz .end_search_index |
||
6462 | pathoswith | 661 | @@: |
662 | cmp ecx, [esi+sizeof.INDEX+INDEX.fileBlock] |
||
663 | jb .end_search_index |
||
664 | add esi, sizeof.INDEX |
||
665 | dec ebx |
||
6726 | pathoswith | 666 | jnz @b |
6462 | pathoswith | 667 | .end_search_index: |
668 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
669 | mov eax, [esi+INDEX.nodeBlock] |
||
670 | call extfsReadBlock |
||
6726 | pathoswith | 671 | jc .fail2 |
6462 | pathoswith | 672 | mov esi, ebx |
673 | jmp .extentTreeSearch |
||
674 | |||
6726 | pathoswith | 675 | .fail: |
676 | movi eax, ERROR_FS_FAIL |
||
677 | jmp .fail2 |
||
678 | |||
6462 | pathoswith | 679 | .leaf_block: |
6726 | pathoswith | 680 | movzx edx, [esi+EXTENT.blocksCount] |
681 | add edx, [esi+EXTENT.fileBlock] |
||
682 | sub edx, ecx |
||
683 | ja .end_search_extent |
||
6462 | pathoswith | 684 | add esi, sizeof.EXTENT |
685 | dec ebx |
||
6726 | pathoswith | 686 | jnz .leaf_block |
687 | .noBlock: |
||
688 | movi eax, ERROR_END_OF_FILE |
||
689 | .fail2: |
||
690 | pop esi edx ebx |
||
691 | stc |
||
692 | ret |
||
6462 | pathoswith | 693 | |
694 | .end_search_extent: |
||
695 | sub ecx, [esi+EXTENT.fileBlock] |
||
6726 | pathoswith | 696 | jc .fail |
6462 | pathoswith | 697 | add ecx, [esi+EXTENT.fsBlock] |
6726 | pathoswith | 698 | mov eax, ecx |
699 | mov ecx, edx |
||
700 | pop esi edx ebx |
||
6462 | pathoswith | 701 | ret |
702 | |||
703 | .listTreeSearch: |
||
704 | cmp ecx, 12 |
||
705 | jb .get_direct_block |
||
706 | sub ecx, 12 |
||
707 | cmp ecx, [ebp+EXTFS.dwordsPerBlock] |
||
708 | jb .get_indirect_block |
||
709 | sub ecx, [ebp+EXTFS.dwordsPerBlock] |
||
710 | cmp ecx, [ebp+EXTFS.dwordsPerBranch] |
||
711 | jb .get_double_indirect_block |
||
712 | ; triply-indirect blocks |
||
713 | sub ecx, [ebp+EXTFS.dwordsPerBranch] |
||
714 | mov eax, [esi+INODE.tripleAddress] |
||
6558 | pathoswith | 715 | test eax, eax |
716 | jz .noBlock |
||
6462 | pathoswith | 717 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
718 | call extfsReadBlock |
||
719 | jc .fail2 |
||
720 | xor edx, edx |
||
721 | mov eax, ecx |
||
722 | div [ebp+EXTFS.dwordsPerBranch] |
||
723 | ; eax = number in triply-indirect block, edx = number in branch |
||
724 | mov eax, [ebx+eax*4] |
||
725 | test eax, eax |
||
6558 | pathoswith | 726 | jz .noBlock |
6462 | pathoswith | 727 | call extfsReadBlock |
728 | jc .fail2 |
||
729 | mov eax, edx |
||
730 | jmp @f |
||
731 | |||
6726 | pathoswith | 732 | .get_direct_block: |
733 | mov edx, ecx |
||
734 | mov cl, 12 |
||
735 | lea ebx, [esi+INODE.blockNumbers] |
||
736 | jmp .calculateExtent |
||
6462 | pathoswith | 737 | |
6726 | pathoswith | 738 | .get_indirect_block: |
739 | mov eax, [esi+INODE.addressBlock] |
||
740 | test eax, eax |
||
741 | jz .noBlock |
||
742 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
743 | call extfsReadBlock |
||
744 | jc .fail2 |
||
745 | mov edx, ecx |
||
746 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
747 | jmp .calculateExtent |
||
748 | |||
6462 | pathoswith | 749 | .get_double_indirect_block: |
750 | mov eax, [esi+INODE.doubleAddress] |
||
751 | test eax, eax |
||
6558 | pathoswith | 752 | jz .noBlock |
6462 | pathoswith | 753 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
754 | call extfsReadBlock |
||
755 | jc .fail2 |
||
756 | mov eax, ecx |
||
757 | @@: |
||
758 | xor edx, edx |
||
6726 | pathoswith | 759 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
760 | div ecx |
||
6462 | pathoswith | 761 | ; eax = number in doubly-indirect block, edx = number in indirect block |
762 | mov eax, [ebx+eax*4] |
||
763 | test eax, eax |
||
6558 | pathoswith | 764 | jz .noBlock |
6462 | pathoswith | 765 | call extfsReadBlock |
766 | jc .fail2 |
||
6726 | pathoswith | 767 | .calculateExtent: |
768 | lea esi, [ebx+edx*4] |
||
769 | lodsd |
||
6756 | pathoswith | 770 | test eax, eax |
771 | jz .noBlock |
||
6726 | pathoswith | 772 | mov ebx, eax |
773 | sub ecx, edx |
||
774 | xor edx, edx |
||
775 | @@: |
||
776 | inc edx |
||
777 | dec ecx |
||
6462 | pathoswith | 778 | jz @f |
6726 | pathoswith | 779 | lodsd |
780 | sub eax, ebx |
||
781 | sub eax, edx |
||
6462 | pathoswith | 782 | jz @b |
783 | @@: |
||
6726 | pathoswith | 784 | mov eax, ebx |
785 | mov ecx, edx |
||
786 | pop esi edx ebx |
||
787 | clc |
||
6462 | pathoswith | 788 | ret |
789 | |||
790 | getInodeLocation: |
||
791 | ; in: eax = inode number |
||
6756 | pathoswith | 792 | ; out: eax = inode sector, edx = offset in sector |
6462 | pathoswith | 793 | dec eax |
794 | xor edx, edx |
||
795 | div [ebp+EXTFS.superblock.inodesPerGroup] |
||
6848 | pathoswith | 796 | shl eax, 5 |
797 | add eax, [ebp+EXTFS.descriptorTable] |
||
798 | mov ebx, [eax+BGDESCR.inodeTable] |
||
799 | imul ebx, [ebp+EXTFS.sectorsPerBlock] |
||
6809 | pathoswith | 800 | movzx eax, [ebp+EXTFS.superblock.inodeSize] |
801 | mul edx |
||
6462 | pathoswith | 802 | mov edx, eax |
803 | shr eax, 9 |
||
804 | and edx, 511 |
||
6756 | pathoswith | 805 | add eax, ebx |
6462 | pathoswith | 806 | ret |
807 | |||
808 | writeInode: |
||
6575 | pathoswith | 809 | ; in: eax = inode number, ebx -> inode data |
6462 | pathoswith | 810 | push edx edi esi ecx ebx eax |
811 | mov edi, ebx |
||
812 | call fsGetTime |
||
813 | add eax, 978307200 |
||
814 | mov [edi+INODE.inodeModified], eax |
||
815 | pop eax |
||
6774 | pathoswith | 816 | cmp eax, ROOT_INODE |
817 | jnz @f |
||
818 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
||
819 | mov esi, edi |
||
6852 | pathoswith | 820 | lea edi, [ebp+EXTFS.rootInodeBuffer] |
6774 | pathoswith | 821 | rep movsb |
822 | @@: |
||
6462 | pathoswith | 823 | call getInodeLocation |
824 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
825 | mov ecx, eax |
||
826 | call fs_read32_sys |
||
827 | test eax, eax |
||
828 | jnz @f |
||
829 | mov eax, ecx |
||
830 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
||
831 | mov edi, edx |
||
832 | add edi, ebx |
||
6774 | pathoswith | 833 | mov esi, [esp] |
6462 | pathoswith | 834 | rep movsb |
835 | call fs_write32_sys |
||
836 | .ret: |
||
837 | pop ebx ecx esi edi edx |
||
838 | ret |
||
839 | |||
840 | @@: |
||
841 | movi eax, ERROR_DEVICE |
||
842 | stc |
||
843 | jmp .ret |
||
844 | |||
845 | readInode: |
||
6575 | pathoswith | 846 | ; in: eax = inode number, ebx -> inode buffer |
6462 | pathoswith | 847 | push edx edi esi ecx ebx |
848 | mov edi, ebx |
||
849 | call getInodeLocation |
||
850 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
851 | call fs_read32_sys |
||
852 | test eax, eax |
||
853 | jnz @b |
||
854 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
||
855 | mov esi, edx |
||
856 | add esi, ebx |
||
857 | rep movsb |
||
858 | xor eax, eax |
||
859 | pop ebx ecx esi edi edx |
||
860 | ret |
||
861 | |||
6643 | pathoswith | 862 | indirectBlockAlloc: |
863 | ; in: |
||
864 | ; edi -> indirect block number |
||
865 | ; ebx = starting extent block |
||
866 | ; ecx = extent size |
||
867 | ; edx = starting file block |
||
868 | mov eax, [edi] |
||
869 | test eax, eax |
||
870 | jz .newBlock |
||
871 | push edi ebx ecx |
||
872 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
873 | call extfsReadBlock |
||
874 | jc .err2 |
||
875 | lea edi, [ebx+edx*4] |
||
876 | test edx, edx |
||
877 | jz @f |
||
878 | cmp dword[edi-4], 0 |
||
879 | jnz @f |
||
880 | pop ecx ebx edi |
||
881 | .err: |
||
882 | mov al, ERROR_FS_FAIL |
||
883 | stc |
||
884 | ret |
||
885 | |||
886 | .err2: |
||
887 | pop ecx ebx edi |
||
888 | ret |
||
889 | |||
890 | .newBlock: |
||
891 | test edx, edx |
||
892 | jnz .err |
||
893 | mov [edi], ebx |
||
894 | inc ebx |
||
895 | dec ecx |
||
896 | push edi ebx ecx |
||
897 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
898 | mov edi, [ebp+EXTFS.tempBlockBuffer] |
||
899 | push edi |
||
900 | rep stosd |
||
901 | pop edi |
||
902 | @@: |
||
903 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
904 | sub ecx, edx |
||
905 | pop ebx eax |
||
906 | sub ebx, ecx |
||
907 | jnc @f |
||
908 | add ecx, ebx |
||
909 | xor ebx, ebx |
||
910 | @@: |
||
911 | jecxz .done |
||
912 | add edx, ecx |
||
913 | @@: |
||
914 | stosd |
||
915 | inc eax |
||
916 | loop @b |
||
917 | .done: |
||
918 | pop edi |
||
919 | push eax ebx |
||
920 | mov eax, [edi] |
||
921 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
922 | call extfsWriteBlock |
||
923 | pop ecx ebx |
||
924 | ret |
||
925 | |||
926 | doublyIndirectBlockAlloc: |
||
927 | ; in: |
||
928 | ; edi -> indirect block number |
||
929 | ; edx = starting file block |
||
930 | ; ebx = starting extent block |
||
931 | ; ecx = extent size |
||
932 | ; [esp+4] = rest of size |
||
933 | ; [esp+8] = parent inode number |
||
934 | mov eax, [edi] |
||
935 | test eax, eax |
||
936 | jz .newBlock |
||
937 | push edi ecx ebx |
||
938 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
939 | call extfsReadBlock |
||
940 | jc .err2 |
||
941 | mov eax, edx |
||
942 | xor edx, edx |
||
943 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
944 | div ecx |
||
945 | lea edi, [ebx+eax*4] |
||
946 | pop ebx |
||
947 | test eax, eax |
||
948 | jz @f |
||
949 | cmp dword[edi-4], 0 |
||
950 | jnz @f |
||
951 | pop ecx edi |
||
952 | .err: |
||
953 | mov al, ERROR_FS_FAIL |
||
954 | stc |
||
955 | ret |
||
956 | |||
957 | .err2: |
||
958 | pop ebx ecx edi |
||
959 | ret |
||
960 | |||
961 | .newBlock: |
||
962 | test edx, edx |
||
963 | jnz .err |
||
964 | mov [edi], ebx |
||
965 | inc ebx |
||
966 | dec ecx |
||
967 | inc dword[esp+4] |
||
968 | push edi ecx |
||
969 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
970 | mov edi, [ebp+EXTFS.mainBlockBuffer] |
||
971 | push ecx edi |
||
972 | rep stosd |
||
973 | pop edi ecx |
||
974 | @@: |
||
975 | sub ecx, eax |
||
976 | xchg [esp], ecx |
||
977 | .loop: |
||
978 | cmp dword[edi], 0 |
||
979 | jnz @f |
||
980 | inc dword[esp+12] |
||
981 | @@: |
||
982 | jecxz .extentAlloc |
||
983 | call indirectBlockAlloc |
||
984 | jc .end |
||
985 | cmp edx, [ebp+EXTFS.dwordsPerBlock] |
||
986 | jnz @b |
||
987 | add edi, 4 |
||
988 | xor edx, edx |
||
989 | dec dword[esp] |
||
990 | jnz .loop |
||
991 | .end: |
||
992 | pop edi edi |
||
993 | push ebx eax |
||
994 | mov eax, [edi] |
||
995 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
996 | call extfsWriteBlock |
||
997 | pop ebx |
||
998 | add eax, ebx |
||
999 | xor ebx, ebx |
||
1000 | cmp ebx, eax |
||
1001 | pop ebx |
||
1002 | ret |
||
1003 | |||
1004 | .extentAlloc: |
||
1005 | mov ecx, [esp+12] |
||
1006 | xor eax, eax |
||
1007 | jecxz .end |
||
1008 | mov eax, [esp+16] |
||
1009 | call extfsExtentAlloc |
||
1010 | jc .end |
||
1011 | sub [esp+12], ecx |
||
1012 | jmp @b |
||
1013 | |||
6462 | pathoswith | 1014 | extfsExtendFile: |
1015 | ; in: |
||
6558 | pathoswith | 1016 | ; [ebp+EXTFS.inodeBuffer] = inode |
6849 | pathoswith | 1017 | ; ecx = inode number |
1018 | ; edx:eax = new size |
||
1019 | push ebx esi edi ecx |
||
6575 | pathoswith | 1020 | lea esi, [ebp+EXTFS.inodeBuffer] |
6849 | pathoswith | 1021 | mov ebx, [esi+INODE.fileSize] |
1022 | mov ecx, [esi+INODE.fileSizeHigh] |
||
1023 | cmp ebx, eax |
||
1024 | sbb ecx, edx |
||
6643 | pathoswith | 1025 | jnc .ret |
6849 | pathoswith | 1026 | mov ecx, [esi+INODE.fileSizeHigh] |
6643 | pathoswith | 1027 | mov [esi+INODE.fileSize], eax |
6849 | pathoswith | 1028 | mov [esi+INODE.fileSizeHigh], edx |
1029 | sub eax, 1 |
||
1030 | sbb edx, 0 |
||
1031 | div [ebp+EXTFS.bytesPerBlock] |
||
6643 | pathoswith | 1032 | inc eax |
6849 | pathoswith | 1033 | xchg eax, ebx |
1034 | mov edx, ecx |
||
1035 | sub eax, 1 |
||
1036 | sbb edx, 0 |
||
6643 | pathoswith | 1037 | jc @f |
6849 | pathoswith | 1038 | div [ebp+EXTFS.bytesPerBlock] |
6643 | pathoswith | 1039 | @@: |
6849 | pathoswith | 1040 | inc eax |
1041 | sub ebx, eax |
||
6643 | pathoswith | 1042 | jz .ret |
6849 | pathoswith | 1043 | push ebx |
1044 | mov edx, eax |
||
6643 | pathoswith | 1045 | @@: |
1046 | mov ecx, [esp] |
||
1047 | mov eax, [esp+4] |
||
1048 | test ecx, ecx |
||
1049 | jz .done |
||
1050 | call extfsExtentAlloc |
||
1051 | jc .errDone |
||
1052 | sub [esp], ecx |
||
1053 | cmp edx, 12 |
||
1054 | jc .directBlocks |
||
1055 | sub edx, 12 |
||
1056 | cmp edx, [ebp+EXTFS.dwordsPerBlock] |
||
1057 | jc .indirectBlocks |
||
1058 | sub edx, [ebp+EXTFS.dwordsPerBlock] |
||
1059 | cmp edx, [ebp+EXTFS.dwordsPerBranch] |
||
1060 | jc .doublyIndirectBlock |
||
1061 | sub edx, [ebp+EXTFS.dwordsPerBranch] |
||
1062 | jmp .triplyIndirectBlock |
||
1063 | |||
1064 | .newExtent: |
||
1065 | jmp @b |
||
1066 | |||
1067 | .directBlocks: |
||
1068 | lea edi, [esi+INODE.blockNumbers+edx*4] |
||
1069 | test edx, edx |
||
1070 | jz @f |
||
1071 | cmp dword[edi-4], 0 |
||
1072 | jz .errDone |
||
6575 | pathoswith | 1073 | @@: |
1074 | mov eax, ebx |
||
6643 | pathoswith | 1075 | mov ebx, ecx |
1076 | mov ecx, 12 |
||
1077 | sub ecx, edx |
||
1078 | sub ebx, ecx |
||
1079 | jnc @f |
||
1080 | add ecx, ebx |
||
1081 | xor ebx, ebx |
||
1082 | @@: |
||
1083 | add edx, ecx |
||
1084 | @@: |
||
1085 | stosd |
||
1086 | inc eax |
||
1087 | loop @b |
||
1088 | mov ecx, ebx |
||
1089 | mov ebx, eax |
||
1090 | jecxz .newExtent |
||
6462 | pathoswith | 1091 | xor edx, edx |
6643 | pathoswith | 1092 | .indirectBlocks: |
1093 | lea edi, [esi+INODE.addressBlock] |
||
1094 | cmp dword[edi], 0 |
||
1095 | jnz @f |
||
1096 | inc dword[esp] |
||
1097 | @@: |
||
1098 | call indirectBlockAlloc |
||
1099 | jc .errDone |
||
1100 | add edx, 12 |
||
1101 | jecxz .newExtent |
||
1102 | xor edx, edx |
||
1103 | .doublyIndirectBlock: |
||
1104 | lea edi, [esi+INODE.doubleAddress] |
||
1105 | call doublyIndirectBlockAlloc |
||
1106 | jc .errDone |
||
1107 | mov edx, [ebp+EXTFS.dwordsPerBranch] |
||
1108 | add edx, [ebp+EXTFS.dwordsPerBlock] |
||
1109 | add edx, 12 |
||
1110 | jecxz .newExtent |
||
1111 | xor edx, edx |
||
1112 | .triplyIndirectBlock: |
||
1113 | push ecx ebx edx |
||
1114 | stdcall kernel_alloc, [ebp+EXTFS.bytesPerBlock] |
||
1115 | pop edx |
||
1116 | mov esi, eax |
||
1117 | mov eax, [ebp+EXTFS.inodeBuffer.tripleAddress] |
||
1118 | test eax, eax |
||
1119 | jz .newBlock |
||
1120 | mov ebx, esi |
||
1121 | call extfsReadBlock |
||
1122 | pop ebx ecx |
||
1123 | jc .errFree |
||
1124 | mov eax, edx |
||
1125 | xor edx, edx |
||
1126 | div [ebp+EXTFS.dwordsPerBranch] |
||
1127 | lea edi, [esi+eax*4] |
||
1128 | test eax, eax |
||
1129 | jz @f |
||
1130 | cmp dword[edi-4], 0 |
||
1131 | jnz @f |
||
1132 | mov al, ERROR_FS_FAIL |
||
1133 | .errFree: |
||
1134 | push ecx eax |
||
1135 | stdcall kernel_free, esi |
||
1136 | pop eax ecx |
||
1137 | .errDone: |
||
1138 | imul ecx, [ebp+EXTFS.sectorsPerBlock] |
||
1139 | sub [ebp+EXTFS.inodeBuffer.sectorsUsed], ecx |
||
1140 | pop ebx |
||
1141 | imul ebx, [ebp+EXTFS.sectorsPerBlock] |
||
6575 | pathoswith | 1142 | add ebx, ecx |
6643 | pathoswith | 1143 | shl ebx, 9 |
1144 | sub [ebp+EXTFS.inodeBuffer.fileSize], ebx |
||
1145 | stc |
||
1146 | jmp .ret |
||
1147 | |||
1148 | .newBlock: |
||
1149 | pop ebx ecx |
||
1150 | mov al, ERROR_FS_FAIL |
||
1151 | test edx, edx |
||
1152 | jnz .errFree |
||
1153 | mov [ebp+EXTFS.inodeBuffer.tripleAddress], ebx |
||
1154 | inc ebx |
||
1155 | dec ecx |
||
1156 | inc dword[esp] |
||
1157 | push ecx |
||
1158 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
1159 | mov edi, esi |
||
1160 | xor eax, eax |
||
1161 | rep stosd |
||
1162 | mov edi, esi |
||
1163 | pop ecx |
||
1164 | @@: |
||
1165 | jecxz .extentAlloc |
||
1166 | call doublyIndirectBlockAlloc |
||
1167 | jc .errSave |
||
1168 | add edi, 4 |
||
1169 | jmp @b |
||
1170 | |||
1171 | .extentAlloc: |
||
1172 | mov ecx, [esp] |
||
1173 | mov eax, [esp+4] |
||
1174 | jecxz @f |
||
1175 | call extfsExtentAlloc |
||
1176 | jc .errSave |
||
1177 | sub [esp], ecx |
||
1178 | jmp @b |
||
1179 | |||
1180 | @@: |
||
1181 | mov eax, [ebp+EXTFS.inodeBuffer.tripleAddress] |
||
1182 | mov ebx, esi |
||
1183 | call extfsWriteBlock |
||
1184 | stdcall kernel_free, esi |
||
6558 | pathoswith | 1185 | .done: |
6462 | pathoswith | 1186 | xor eax, eax |
6643 | pathoswith | 1187 | pop edi |
6462 | pathoswith | 1188 | .ret: |
6849 | pathoswith | 1189 | pop edi edi esi ebx |
6462 | pathoswith | 1190 | ret |
1191 | |||
6643 | pathoswith | 1192 | .errSave: |
1193 | push eax |
||
1194 | mov eax, [ebp+EXTFS.inodeBuffer.tripleAddress] |
||
1195 | mov ebx, esi |
||
1196 | call extfsWriteBlock |
||
1197 | pop eax |
||
1198 | jmp .errFree |
||
1199 | |||
6856 | pathoswith | 1200 | freeBlockList: |
1201 | ; in: edi -> list of blocks, edx = amount of blocks |
||
1202 | ; out: ebx=0 -> end of list |
||
6756 | pathoswith | 1203 | mov ebx, [edi] |
1204 | test ebx, ebx |
||
6856 | pathoswith | 1205 | jz .ret |
6756 | pathoswith | 1206 | xor eax, eax |
6643 | pathoswith | 1207 | xor ecx, ecx |
1208 | @@: |
||
1209 | stosd |
||
6756 | pathoswith | 1210 | inc ecx |
6643 | pathoswith | 1211 | dec edx |
6756 | pathoswith | 1212 | jz @f |
1213 | mov eax, [edi] |
||
1214 | sub eax, ebx |
||
1215 | sub eax, ecx |
||
1216 | jz @b |
||
1217 | @@: |
||
1218 | mov eax, ebx |
||
1219 | call extfsExtentFree |
||
1220 | test edx, edx |
||
6856 | pathoswith | 1221 | jnz freeBlockList |
1222 | .ret: |
||
1223 | ret |
||
1224 | |||
1225 | freeIndirectBlock: |
||
1226 | ; in: edi -> indirect block number, edx = starting block |
||
1227 | ; out: edi = edi+4, eax=0 -> end |
||
1228 | pushd ecx 0 edi edx |
||
1229 | mov eax, [edi] |
||
1230 | test eax, eax |
||
1231 | jz .ret |
||
1232 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
1233 | call extfsReadBlock |
||
1234 | jc .ret |
||
1235 | lea edi, [ebx+edx*4] |
||
1236 | neg edx |
||
1237 | add edx, [ebp+EXTFS.dwordsPerBlock] |
||
1238 | call freeBlockList |
||
1239 | test ebx, ebx |
||
1240 | jz @f |
||
1241 | inc dword[esp+8] |
||
1242 | @@: |
||
6643 | pathoswith | 1243 | pop edx edi |
1244 | mov eax, [edi] |
||
1245 | test edx, edx |
||
1246 | jnz @f |
||
6756 | pathoswith | 1247 | xor ecx, ecx |
1248 | inc ecx |
||
1249 | call extfsExtentFree |
||
6643 | pathoswith | 1250 | stosd |
1251 | jmp .done |
||
1252 | |||
1253 | @@: |
||
6756 | pathoswith | 1254 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
6643 | pathoswith | 1255 | call extfsWriteBlock |
1256 | add edi, 4 |
||
1257 | .done: |
||
1258 | pop eax ecx |
||
1259 | xor edx, edx |
||
1260 | ret |
||
1261 | |||
1262 | .ret: |
||
1263 | pop edi edi edx ecx |
||
1264 | ret |
||
1265 | |||
1266 | freeDoublyIndirectBlock: |
||
1267 | ; in: edi -> doubly-indirect block number, edx = starting block |
||
1268 | ; out: edi = edi+4, eax=-1 -> done, eax=0 -> end |
||
1269 | mov eax, [edi] |
||
1270 | test eax, eax |
||
1271 | jz .ret |
||
1272 | push ecx eax edx |
||
1273 | stdcall kernel_alloc, [ebp+EXTFS.bytesPerBlock] |
||
1274 | mov ebx, eax |
||
1275 | pop edx eax |
||
1276 | pushd 0 ebx edx |
||
1277 | call extfsReadBlock |
||
1278 | jc .err |
||
1279 | mov eax, edx |
||
1280 | xor edx, edx |
||
1281 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
1282 | div ecx |
||
1283 | sub ecx, eax |
||
1284 | push edi |
||
1285 | lea edi, [ebx+eax*4] |
||
1286 | @@: |
||
1287 | call freeIndirectBlock |
||
1288 | test eax, eax |
||
1289 | jz .end |
||
1290 | dec ecx |
||
1291 | jnz @b |
||
1292 | dec dword[esp+12] |
||
1293 | .end: |
||
1294 | pop edi edx |
||
1295 | mov eax, [edi] |
||
1296 | test edx, edx |
||
1297 | jnz @f |
||
1298 | xor ecx, ecx |
||
6756 | pathoswith | 1299 | inc ecx |
1300 | call extfsExtentFree |
||
6643 | pathoswith | 1301 | stosd |
1302 | jmp .done |
||
1303 | |||
1304 | @@: |
||
1305 | mov ebx, [esp] |
||
1306 | call extfsWriteBlock |
||
1307 | add edi, 4 |
||
1308 | jmp .done |
||
1309 | |||
1310 | .err: |
||
1311 | mov [esp+8], eax |
||
1312 | pop eax |
||
1313 | .done: |
||
1314 | call kernel_free |
||
1315 | pop eax ecx |
||
1316 | .ret: |
||
1317 | xor edx, edx |
||
1318 | ret |
||
1319 | |||
6462 | pathoswith | 1320 | extfsTruncateFile: |
6849 | pathoswith | 1321 | ; in: edx:eax = new size, [ebp+EXTFS.inodeBuffer] = inode |
6575 | pathoswith | 1322 | lea esi, [ebp+EXTFS.inodeBuffer] |
6849 | pathoswith | 1323 | mov ecx, edx |
1324 | cmp eax, [esi+INODE.fileSize] |
||
1325 | sbb ecx, [esi+INODE.fileSizeHigh] |
||
6462 | pathoswith | 1326 | jnc .ret |
6849 | pathoswith | 1327 | mov [esi+INODE.fileSize], eax |
1328 | mov [esi+INODE.fileSizeHigh], edx |
||
1329 | sub eax, 1 |
||
1330 | sbb edx, 0 |
||
1331 | jc @f |
||
1332 | div [ebp+EXTFS.bytesPerBlock] |
||
1333 | @@: |
||
1334 | inc eax |
||
1335 | mov edx, eax |
||
6643 | pathoswith | 1336 | cmp edx, 12 |
1337 | jc .directBlocks |
||
1338 | sub edx, 12 |
||
1339 | cmp edx, [ebp+EXTFS.dwordsPerBlock] |
||
1340 | jc .indirectBlocks |
||
1341 | sub edx, [ebp+EXTFS.dwordsPerBlock] |
||
1342 | cmp edx, [ebp+EXTFS.dwordsPerBranch] |
||
1343 | jc .doublyIndirectBlock |
||
1344 | sub edx, [ebp+EXTFS.dwordsPerBranch] |
||
1345 | jmp .triplyIndirectBlock |
||
1346 | |||
1347 | .directBlocks: |
||
1348 | lea edi, [esi+INODE.blockNumbers+edx*4] |
||
1349 | neg edx |
||
1350 | add edx, 12 |
||
6856 | pathoswith | 1351 | call freeBlockList |
1352 | test ebx, ebx |
||
6643 | pathoswith | 1353 | jz .ret |
1354 | .indirectBlocks: |
||
1355 | lea edi, [esi+INODE.addressBlock] |
||
1356 | call freeIndirectBlock |
||
1357 | test eax, eax |
||
1358 | jz .ret |
||
1359 | .doublyIndirectBlock: |
||
1360 | lea edi, [esi+INODE.doubleAddress] |
||
1361 | call freeDoublyIndirectBlock |
||
1362 | test eax, eax |
||
1363 | jz .ret |
||
1364 | .triplyIndirectBlock: |
||
1365 | mov eax, [esi+INODE.tripleAddress] |
||
1366 | test eax, eax |
||
1367 | jz .ret |
||
1368 | push eax edx |
||
1369 | stdcall kernel_alloc, [ebp+EXTFS.bytesPerBlock] |
||
6575 | pathoswith | 1370 | mov ebx, eax |
6643 | pathoswith | 1371 | pop edx eax |
1372 | push ebx eax edx |
||
1373 | call extfsReadBlock |
||
1374 | jc .err |
||
1375 | mov eax, edx |
||
6462 | pathoswith | 1376 | xor edx, edx |
6643 | pathoswith | 1377 | div [ebp+EXTFS.dwordsPerBranch] |
1378 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
1379 | sub ecx, eax |
||
1380 | lea edi, [ebx+eax*4] |
||
1381 | @@: |
||
1382 | call freeDoublyIndirectBlock |
||
1383 | test eax, eax |
||
1384 | jz .end |
||
1385 | dec ecx |
||
1386 | jnz @b |
||
1387 | .end: |
||
1388 | pop edx eax |
||
6462 | pathoswith | 1389 | test edx, edx |
6575 | pathoswith | 1390 | jnz @f |
1391 | xor ecx, ecx |
||
6756 | pathoswith | 1392 | inc ecx |
1393 | call extfsExtentFree |
||
6643 | pathoswith | 1394 | mov [esi+INODE.tripleAddress], eax |
1395 | jmp .done |
||
1396 | |||
6575 | pathoswith | 1397 | @@: |
6643 | pathoswith | 1398 | mov ebx, [esp] |
1399 | call extfsWriteBlock |
||
1400 | jmp .done |
||
6462 | pathoswith | 1401 | |
6643 | pathoswith | 1402 | .err: |
1403 | pop eax eax |
||
6558 | pathoswith | 1404 | .done: |
6643 | pathoswith | 1405 | call kernel_free |
6462 | pathoswith | 1406 | .ret: |
1407 | ret |
||
1408 | |||
1409 | linkInode: |
||
1410 | ; in: |
||
1411 | ; eax = inode on which to link |
||
1412 | ; ebx = inode to link |
||
6471 | pathoswith | 1413 | ; esi -> name in UTF-8 |
6462 | pathoswith | 1414 | ; dl = file type |
1415 | push esi edi ebx ecx eax edx |
||
1416 | call strlen |
||
1417 | push esi ebx ecx |
||
6558 | pathoswith | 1418 | lea esi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 1419 | mov ebx, esi |
1420 | call readInode |
||
1421 | jc .error_inode_read |
||
6643 | pathoswith | 1422 | mov eax, [esi+INODE.fileSize] |
6852 | pathoswith | 1423 | xor edx, edx |
1424 | div [ebp+EXTFS.bytesPerBlock] |
||
6462 | pathoswith | 1425 | xor ecx, ecx |
6558 | pathoswith | 1426 | .searchBlock: |
1427 | push eax ; blocks total |
||
6462 | pathoswith | 1428 | push ecx ; current file block number |
6558 | pathoswith | 1429 | cmp eax, ecx |
1430 | jz .alloc_block |
||
6726 | pathoswith | 1431 | call extfsGetExtent |
6462 | pathoswith | 1432 | jc .error_get_inode_block |
6726 | pathoswith | 1433 | push eax |
6462 | pathoswith | 1434 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
1435 | call extfsReadBlock |
||
1436 | jc .error_block_read |
||
6558 | pathoswith | 1437 | mov ecx, [esp+12] |
6856 | pathoswith | 1438 | add ecx, 8 ; directory entry size |
6462 | pathoswith | 1439 | mov edi, [ebp+EXTFS.tempBlockBuffer] |
1440 | mov edx, edi |
||
1441 | add edx, [ebp+EXTFS.bytesPerBlock] |
||
1442 | .searchSpace: |
||
1443 | movzx eax, [edi+DIRENTRY.entryLength] |
||
1444 | test eax, eax |
||
1445 | jz .zeroLength |
||
1446 | cmp [edi+DIRENTRY.inodeNumber], 0 |
||
1447 | je .unusedEntry |
||
1448 | movzx ebx, [edi+DIRENTRY.nameLength] |
||
1449 | add ebx, 8+3 |
||
1450 | and ebx, -4 |
||
1451 | sub eax, ebx |
||
1452 | add edi, ebx |
||
1453 | cmp eax, ecx |
||
1454 | jb .nextEntry |
||
1455 | sub edi, ebx |
||
1456 | mov [edi+DIRENTRY.entryLength], bx |
||
1457 | add edi, ebx |
||
1458 | mov [edi+DIRENTRY.entryLength], ax |
||
1459 | jmp .found |
||
1460 | |||
1461 | .unusedEntry: |
||
1462 | cmp eax, ecx |
||
1463 | jge .found |
||
1464 | .nextEntry: |
||
1465 | add edi, eax |
||
1466 | cmp edi, edx |
||
1467 | jb .searchSpace |
||
6856 | pathoswith | 1468 | pop ecx |
1469 | @@: |
||
1470 | pop ecx eax |
||
6558 | pathoswith | 1471 | inc ecx |
1472 | jmp .searchBlock |
||
6462 | pathoswith | 1473 | |
1474 | .zeroLength: |
||
1475 | mov eax, edx |
||
1476 | sub eax, edi |
||
6856 | pathoswith | 1477 | mov [edi+DIRENTRY.entryLength], ax |
6462 | pathoswith | 1478 | cmp eax, ecx |
1479 | jge .found |
||
1480 | mov [edi+DIRENTRY.inodeNumber], 0 |
||
1481 | pop eax |
||
1482 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
1483 | call extfsWriteBlock |
||
6856 | pathoswith | 1484 | jmp @b |
1485 | |||
6726 | pathoswith | 1486 | .alloc_block: |
6849 | pathoswith | 1487 | mov eax, [esi+INODE.fileSize] |
1488 | add eax, [ebp+EXTFS.bytesPerBlock] |
||
1489 | xor edx, edx |
||
1490 | mov ecx, [esp+24] |
||
6726 | pathoswith | 1491 | call extfsExtendFile |
1492 | jc .error_get_inode_block |
||
1493 | mov eax, [esp+24] |
||
1494 | mov ebx, esi |
||
1495 | call writeInode |
||
1496 | jc .error_get_inode_block |
||
1497 | mov ecx, [esp] |
||
1498 | call extfsGetExtent |
||
6462 | pathoswith | 1499 | jc .error_get_inode_block |
6726 | pathoswith | 1500 | push eax |
6575 | pathoswith | 1501 | mov edi, [ebp+EXTFS.tempBlockBuffer] |
6462 | pathoswith | 1502 | mov eax, [ebp+EXTFS.bytesPerBlock] |
1503 | mov [edi+DIRENTRY.entryLength], ax |
||
1504 | .found: |
||
1505 | pop edx ecx ecx ecx ebx esi |
||
6575 | pathoswith | 1506 | mov [edi+DIRENTRY.inodeNumber], ebx |
1507 | mov word [edi+DIRENTRY.nameLength], cx |
||
6856 | pathoswith | 1508 | sub eax, 8 |
1509 | cmp ecx, eax |
||
1510 | adc ecx, 0 |
||
1511 | test [ebp+EXTFS.superblock.incompatibleFlags], 2 |
||
1512 | jz @f |
||
1513 | mov eax, [esp] |
||
6462 | pathoswith | 1514 | mov [edi+DIRENTRY.fileType], al |
6856 | pathoswith | 1515 | @@: |
1516 | push ebx |
||
6462 | pathoswith | 1517 | add edi, 8 |
1518 | rep movsb |
||
1519 | mov eax, edx |
||
1520 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
1521 | call extfsWriteBlock |
||
1522 | mov eax, [esp] |
||
6558 | pathoswith | 1523 | lea ebx, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 1524 | call readInode |
1525 | jc .error_block_write |
||
1526 | pop eax |
||
1527 | inc [ebx+INODE.linksCount] |
||
1528 | call writeInode |
||
1529 | jc @f |
||
1530 | xor eax, eax |
||
1531 | @@: |
||
1532 | pop edx ecx ecx ebx edi esi |
||
1533 | ret |
||
1534 | |||
1535 | .error_block_read: |
||
1536 | pop ebx |
||
1537 | .error_get_inode_block: |
||
1538 | pop ebx ebx |
||
1539 | .error_inode_read: |
||
1540 | pop ebx ebx |
||
1541 | .error_block_write: |
||
1542 | pop ebx |
||
1543 | jmp @b |
||
1544 | |||
1545 | unlinkInode: |
||
6853 | pathoswith | 1546 | ; in: eax = directory inode number, esi = inode to unlink |
1547 | push edi |
||
6558 | pathoswith | 1548 | lea ebx, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 1549 | call readInode |
6853 | pathoswith | 1550 | jc .ret |
1551 | xor ecx, ecx |
||
6462 | pathoswith | 1552 | .loop: |
6853 | pathoswith | 1553 | push ecx |
6726 | pathoswith | 1554 | call extfsGetExtent |
6462 | pathoswith | 1555 | jc .fail_loop |
6726 | pathoswith | 1556 | mov edi, eax |
6462 | pathoswith | 1557 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
1558 | call extfsReadBlock |
||
1559 | jc .fail_loop |
||
1560 | .first_dir_entry: ; edi -> block |
||
6853 | pathoswith | 1561 | cmp [ebx+DIRENTRY.inodeNumber], esi |
6462 | pathoswith | 1562 | jne @f |
1563 | mov [ebx+DIRENTRY.inodeNumber], 0 |
||
1564 | mov word [ebx+DIRENTRY.nameLength], 0 ; fileType = 0 |
||
1565 | jmp .write_block |
||
1566 | |||
6853 | pathoswith | 1567 | .fail: |
1568 | pop edi |
||
1569 | movi eax, ERROR_FS_FAIL |
||
1570 | stc |
||
1571 | .fail_loop: |
||
1572 | pop edi |
||
1573 | jmp .ret |
||
1574 | |||
1575 | .next: |
||
1576 | pop ecx ecx |
||
1577 | inc ecx |
||
1578 | jmp .loop |
||
1579 | |||
6462 | pathoswith | 1580 | @@: |
1581 | mov edx, ebx |
||
1582 | add edx, [ebp+EXTFS.bytesPerBlock] |
||
1583 | push edx |
||
6853 | pathoswith | 1584 | @@: |
1585 | movzx ecx, [ebx+DIRENTRY.entryLength] |
||
1586 | jecxz .fail |
||
6462 | pathoswith | 1587 | mov edx, ebx |
1588 | add ebx, ecx |
||
6853 | pathoswith | 1589 | cmp ebx, [esp] |
1590 | jnc .next |
||
1591 | cmp [ebx+DIRENTRY.inodeNumber], esi |
||
1592 | jnz @b |
||
6462 | pathoswith | 1593 | mov cx, [ebx+DIRENTRY.entryLength] |
1594 | add [edx+DIRENTRY.entryLength], cx |
||
1595 | pop eax |
||
1596 | .write_block: |
||
1597 | pop eax |
||
1598 | mov eax, edi |
||
1599 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
1600 | call extfsWriteBlock |
||
6853 | pathoswith | 1601 | .ret: |
1602 | pop edi |
||
6462 | pathoswith | 1603 | ret |
1604 | |||
6522 | pathoswith | 1605 | findInode: |
6471 | pathoswith | 1606 | ; in: esi -> path string in UTF-8 |
6462 | pathoswith | 1607 | ; out: |
6471 | pathoswith | 1608 | ; edi -> file name in UTF-8 |
6522 | pathoswith | 1609 | ; esi = last inode number |
6558 | pathoswith | 1610 | ; [ebp+EXTFS.inodeBuffer] = last inode |
6522 | pathoswith | 1611 | ; ecx = parent inode number |
1612 | ; CF=1 -> file not found, edi=0 -> error |
||
6462 | pathoswith | 1613 | push esi |
1614 | lea esi, [ebp+EXTFS.rootInodeBuffer] |
||
6558 | pathoswith | 1615 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 1616 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
6522 | pathoswith | 1617 | mov edx, esi |
6462 | pathoswith | 1618 | rep movsb |
6522 | pathoswith | 1619 | pop esi |
6849 | pathoswith | 1620 | pushd ebx 0 ROOT_INODE |
6558 | pathoswith | 1621 | mov edi, esi |
6756 | pathoswith | 1622 | cmp [edx+INODE.fileSize], 0 |
6522 | pathoswith | 1623 | jz .not_found |
1624 | cmp byte [esi], 0 |
||
1625 | jnz .next_path_part |
||
6462 | pathoswith | 1626 | xor eax, eax |
6849 | pathoswith | 1627 | pop esi ecx ebx |
6468 | pathoswith | 1628 | ret |
6462 | pathoswith | 1629 | |
6522 | pathoswith | 1630 | @@: |
1631 | pop esi esi |
||
1632 | .error: |
||
6849 | pathoswith | 1633 | pop esi ecx ebx |
6522 | pathoswith | 1634 | xor edi, edi |
1635 | stc |
||
1636 | ret |
||
1637 | |||
6462 | pathoswith | 1638 | .next_path_part: |
6756 | pathoswith | 1639 | push [edx+INODE.fileSize] |
6462 | pathoswith | 1640 | xor ecx, ecx |
1641 | .folder_block_cycle: |
||
1642 | push ecx |
||
6726 | pathoswith | 1643 | call extfsGetExtent |
6522 | pathoswith | 1644 | jc @b |
6462 | pathoswith | 1645 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
1646 | call extfsReadBlock |
||
6522 | pathoswith | 1647 | jc @b |
6462 | pathoswith | 1648 | push esi edx |
1649 | mov edx, ebx |
||
1650 | add edx, [ebp+EXTFS.bytesPerBlock] |
||
1651 | .start_rec: |
||
1652 | cmp [ebx+DIRENTRY.inodeNumber], 0 |
||
1653 | jz .next_rec |
||
1654 | push esi |
||
1655 | movzx ecx, [ebx+DIRENTRY.nameLength] |
||
6471 | pathoswith | 1656 | lea edi, [ebx+DIRENTRY.name] |
1657 | repz cmpsb |
||
1658 | jz .test_find |
||
6462 | pathoswith | 1659 | @@: ; doesn't match |
1660 | pop esi |
||
1661 | .next_rec: |
||
6856 | pathoswith | 1662 | movzx ecx, [ebx+DIRENTRY.entryLength] |
1663 | jecxz .stop |
||
1664 | add ebx, ecx |
||
6462 | pathoswith | 1665 | cmp ebx, edx |
1666 | jb .start_rec |
||
6856 | pathoswith | 1667 | jmp .stop |
6462 | pathoswith | 1668 | |
1669 | .test_find: |
||
1670 | cmp byte [esi], 0 |
||
1671 | je @f |
||
1672 | cmp byte [esi], '/' |
||
1673 | jne @b |
||
1674 | inc esi |
||
1675 | @@: |
||
6856 | pathoswith | 1676 | pop edx |
1677 | .stop: |
||
1678 | pop edx edi ecx eax |
||
6462 | pathoswith | 1679 | ; ebx -> matched directory entry, esi -> name without parent, or not changed |
1680 | cmp edi, esi |
||
6522 | pathoswith | 1681 | jnz @f |
6756 | pathoswith | 1682 | sub eax, [ebp+EXTFS.bytesPerBlock] |
6462 | pathoswith | 1683 | jle .not_found |
1684 | push eax |
||
1685 | inc ecx |
||
1686 | jmp .folder_block_cycle |
||
1687 | |||
6522 | pathoswith | 1688 | @@: |
6462 | pathoswith | 1689 | pop eax |
6522 | pathoswith | 1690 | mov [esp], eax |
6462 | pathoswith | 1691 | mov eax, [ebx+DIRENTRY.inodeNumber] |
6558 | pathoswith | 1692 | lea ebx, [ebp+EXTFS.inodeBuffer] |
6522 | pathoswith | 1693 | push eax |
6462 | pathoswith | 1694 | call readInode |
6522 | pathoswith | 1695 | jc .error |
1696 | cmp byte [esi], 0 |
||
1697 | je .ret |
||
1698 | mov edx, ebx |
||
1699 | movzx eax, [ebx+INODE.accessMode] |
||
1700 | and eax, TYPE_MASK |
||
1701 | cmp eax, DIRECTORY |
||
1702 | jz .next_path_part |
||
6558 | pathoswith | 1703 | xor edi, edi ; path folder is a file |
1704 | jmp @f |
||
1705 | |||
6462 | pathoswith | 1706 | .not_found: |
6558 | pathoswith | 1707 | mov esi, edi |
1708 | call strlen |
||
1709 | mov al, '/' |
||
1710 | repnz scasb |
||
1711 | mov edi, esi |
||
1712 | jnz @f |
||
1713 | xor edi, edi ; path folder not found |
||
1714 | @@: |
||
6462 | pathoswith | 1715 | movi eax, ERROR_FILE_NOT_FOUND |
1716 | stc |
||
6522 | pathoswith | 1717 | .ret: |
6849 | pathoswith | 1718 | pop esi ecx ebx |
6468 | pathoswith | 1719 | ret |
6462 | pathoswith | 1720 | |
1721 | writeSuperblock: |
||
1722 | push ebx |
||
1723 | mov eax, 2 |
||
1724 | lea ebx, [ebp+EXTFS.superblock] |
||
1725 | call fs_write32_sys |
||
1726 | pop ebx |
||
1727 | ret |
||
1728 | |||
1729 | extfsWritingInit: |
||
1730 | movi eax, ERROR_UNSUPPORTED_FS |
||
1731 | test [ebp+EXTFS.mountType], READ_ONLY |
||
1732 | jnz @f |
||
1733 | ext_lock: |
||
1734 | lea ecx, [ebp+EXTFS.Lock] |
||
1735 | jmp mutex_lock |
||
1736 | |||
1737 | @@: |
||
1738 | pop ebx |
||
1739 | xor ebx, ebx |
||
1740 | ret |
||
1741 | |||
1742 | ext_unlock: |
||
1743 | lea ecx, [ebp+EXTFS.Lock] |
||
1744 | jmp mutex_unlock |
||
1745 | |||
1746 | ;---------------------------------------------------------------- |
||
1747 | ext_ReadFolder: |
||
1748 | call ext_lock |
||
1749 | cmp byte [esi], 0 |
||
1750 | jz .root_folder |
||
6468 | pathoswith | 1751 | call findInode |
6462 | pathoswith | 1752 | jc .error_ret |
6558 | pathoswith | 1753 | lea esi, [ebp+EXTFS.inodeBuffer] |
6522 | pathoswith | 1754 | test [esi+INODE.accessMode], FLAG_FILE |
1755 | jnz .error_not_found |
||
6462 | pathoswith | 1756 | jmp @f |
1757 | |||
1758 | .root_folder: |
||
1759 | lea esi, [ebp+EXTFS.rootInodeBuffer] |
||
6558 | pathoswith | 1760 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 1761 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
1762 | shr ecx, 2 |
||
1763 | push edi |
||
1764 | rep movsd |
||
1765 | pop esi |
||
1766 | @@: |
||
1767 | cmp [esi+INODE.fileSize], 0 |
||
1768 | je .error_empty_dir |
||
1769 | mov edx, [ebx+16] |
||
1770 | push edx ; [edi+28] result buffer |
||
1771 | push 0 ; [edi+24] end of the current block in folder |
||
1772 | pushd [ebx+12] ; [edi+20] files to read |
||
1773 | pushd [ebx+4] ; [edi+16] first wanted file |
||
1774 | pushd [ebx+8] ; [edi+12] flags |
||
1775 | push 0 ; [edi+8] read files |
||
1776 | push 0 ; [edi+4] files in folder |
||
1777 | push 0 ; [edi] current block index |
||
1778 | mov edi, esp ; edi -> local variables |
||
1779 | add edx, 32 |
||
1780 | xor ecx, ecx |
||
6726 | pathoswith | 1781 | call extfsGetExtent |
6462 | pathoswith | 1782 | jc .error_get_block |
1783 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
1784 | call extfsReadBlock |
||
1785 | jc .error_get_block |
||
1786 | mov eax, ebx |
||
1787 | add eax, [ebp+EXTFS.bytesPerBlock] |
||
1788 | mov [edi+24], eax |
||
1789 | mov ecx, [edi+16] |
||
1790 | .find_wanted_start: |
||
1791 | jecxz .find_wanted_end |
||
1792 | .find_wanted_cycle: |
||
1793 | cmp [ebx+DIRENTRY.inodeNumber], 0 |
||
1794 | jz @f |
||
1795 | inc dword [edi+4] |
||
1796 | dec ecx |
||
1797 | @@: |
||
1798 | movzx eax, [ebx+DIRENTRY.entryLength] |
||
1799 | cmp eax, 12 ; minimum entry length |
||
1800 | jb .error_bad_len |
||
1801 | test eax, 3 ; length must be aligned |
||
1802 | jnz .error_bad_len |
||
1803 | sub [esi+INODE.fileSize], eax |
||
1804 | add ebx, eax |
||
1805 | cmp ebx, [edi+24] |
||
1806 | jb .find_wanted_start |
||
1807 | push .find_wanted_start |
||
1808 | .end_block: ; read next block |
||
1809 | cmp [esi+INODE.fileSize], 0 |
||
1810 | jle .end_dir |
||
1811 | inc dword [edi] |
||
1812 | push ecx |
||
1813 | mov ecx, [edi] |
||
6726 | pathoswith | 1814 | call extfsGetExtent |
6462 | pathoswith | 1815 | jc .error_get_block |
1816 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
1817 | call extfsReadBlock |
||
1818 | jc .error_get_block |
||
1819 | pop ecx |
||
1820 | mov eax, ebx |
||
1821 | add eax, [ebp+EXTFS.bytesPerBlock] |
||
1822 | mov [edi+24], eax |
||
1823 | ret |
||
1824 | |||
1825 | .wanted_end: |
||
1826 | loop .find_wanted_cycle |
||
1827 | .find_wanted_end: |
||
1828 | mov ecx, [edi+20] |
||
1829 | .wanted_start: |
||
1830 | jecxz .wanted_end |
||
1831 | cmp [ebx+DIRENTRY.inodeNumber], 0 |
||
1832 | jz .empty_rec |
||
1833 | inc dword [edi+8] |
||
1834 | inc dword [edi+4] |
||
6558 | pathoswith | 1835 | push ebx edi ecx esi edx edi |
6471 | pathoswith | 1836 | pushd [edi+12] |
6462 | pathoswith | 1837 | mov edi, edx |
1838 | xor eax, eax |
||
1839 | mov ecx, 40 / 4 |
||
1840 | rep stosd |
||
6558 | pathoswith | 1841 | popd [edx+4] edi |
6462 | pathoswith | 1842 | mov eax, [ebx+DIRENTRY.inodeNumber] |
6558 | pathoswith | 1843 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
6462 | pathoswith | 1844 | call readInode |
1845 | jc .error_read_subinode |
||
1846 | mov esi, ebx |
||
1847 | lea edi, [edx+8] |
||
1848 | mov eax, [ebx+INODE.inodeModified] |
||
1849 | sub eax, 978307200 ; 01.01.1970-01.01.2001 = (365*31+8)*24*60*60 |
||
1850 | call fsTime2bdfe |
||
1851 | |||
1852 | mov eax, [esi+INODE.accessedTime] |
||
1853 | sub eax, 978307200 |
||
1854 | call fsTime2bdfe |
||
1855 | |||
1856 | mov eax, [esi+INODE.dataModified] |
||
1857 | sub eax, 978307200 |
||
1858 | call fsTime2bdfe |
||
1859 | pop edx |
||
1860 | or dword [edx], KOS_DIRECTORY |
||
6522 | pathoswith | 1861 | test [esi+INODE.accessMode], FLAG_FILE |
1862 | jz @f |
||
6462 | pathoswith | 1863 | xor dword [edx], KOS_DIRECTORY ; mark as file |
1864 | mov eax, [esi+INODE.fileSize] |
||
1865 | stosd |
||
1866 | mov eax, [esi+INODE.fileSizeHigh] |
||
1867 | stosd |
||
1868 | @@: |
||
1869 | mov esi, [esp+12] |
||
1870 | movzx ecx, [esi+DIRENTRY.nameLength] |
||
6471 | pathoswith | 1871 | lea esi, [esi+DIRENTRY.name] |
1872 | cmp byte [esi], '.' |
||
1873 | jnz @f |
||
1874 | or byte [edx], KOS_HIDDEN |
||
1875 | @@: |
||
6462 | pathoswith | 1876 | lea edi, [edx+40] |
6798 | pathoswith | 1877 | cmp byte [edx+4], 3 |
1878 | jz .utf8 |
||
1879 | add ecx, esi |
||
1880 | cmp byte [edx+4], 2 |
||
6471 | pathoswith | 1881 | jz .utf16 |
1882 | @@: |
||
1883 | call utf8to16 |
||
1884 | call uni2ansi_char |
||
1885 | stosb |
||
1886 | cmp esi, ecx |
||
1887 | jc @b |
||
6462 | pathoswith | 1888 | and byte [edi], 0 |
6471 | pathoswith | 1889 | add edx, 40+264 |
1890 | @@: |
||
6462 | pathoswith | 1891 | pop esi ecx edi ebx |
1892 | dec ecx |
||
1893 | .empty_rec: |
||
1894 | movzx eax, [ebx+DIRENTRY.entryLength] |
||
1895 | cmp eax, 12 |
||
1896 | jb .error_bad_len |
||
1897 | test eax, 3 |
||
1898 | jnz .error_bad_len |
||
1899 | sub [esi+INODE.fileSize], eax |
||
1900 | add ebx, eax |
||
1901 | cmp ebx, [edi+24] |
||
1902 | jb .wanted_start |
||
1903 | push .wanted_start |
||
1904 | jmp .end_block |
||
1905 | |||
6798 | pathoswith | 1906 | .utf8: |
1907 | rep movsb |
||
1908 | mov byte [edi], 0 |
||
1909 | add edx, 40+520 |
||
1910 | jmp @b |
||
1911 | |||
6471 | pathoswith | 1912 | .utf16: |
1913 | call utf8to16 |
||
1914 | stosw |
||
1915 | cmp esi, ecx |
||
1916 | jc .utf16 |
||
1917 | and word [edi], 0 |
||
1918 | add edx, 40+520 |
||
1919 | jmp @b |
||
1920 | |||
6462 | pathoswith | 1921 | .end_dir: |
1922 | call ext_unlock |
||
1923 | mov edx, [edi+28] |
||
1924 | mov ebx, [edi+8] |
||
1925 | mov ecx, [edi+4] |
||
1926 | mov dword [edx], 1 ; version |
||
1927 | mov [edx+4], ebx |
||
1928 | mov [edx+8], ecx |
||
1929 | lea esp, [edi+32] |
||
1930 | mov ecx, 20/4 |
||
1931 | lea edi, [edx+12] |
||
1932 | xor eax, eax |
||
1933 | rep stosd |
||
1934 | ret |
||
1935 | |||
1936 | .error_bad_len: |
||
1937 | movi eax, ERROR_FS_FAIL |
||
1938 | .error_read_subinode: |
||
1939 | .error_get_block: |
||
1940 | lea esp, [edi+32] |
||
1941 | .error_ret: |
||
1942 | or ebx, -1 |
||
1943 | push eax |
||
1944 | call ext_unlock |
||
1945 | pop eax |
||
1946 | ret |
||
1947 | |||
1948 | .error_empty_dir: |
||
1949 | movi eax, ERROR_FS_FAIL |
||
1950 | jmp .error_ret |
||
1951 | |||
1952 | .error_not_found: |
||
1953 | movi eax, ERROR_FILE_NOT_FOUND |
||
1954 | jmp .error_ret |
||
1955 | |||
1956 | ;---------------------------------------------------------------- |
||
1957 | ext_ReadFile: |
||
1958 | call ext_lock |
||
6468 | pathoswith | 1959 | call findInode |
6849 | pathoswith | 1960 | pushd 0 eax |
6726 | pathoswith | 1961 | jc .ret |
6558 | pathoswith | 1962 | lea esi, [ebp+EXTFS.inodeBuffer] |
6726 | pathoswith | 1963 | mov byte [esp], ERROR_ACCESS_DENIED |
1964 | test [esi+INODE.accessMode], FLAG_FILE |
||
1965 | jz .ret ; not a file |
||
1966 | mov byte [esp], ERROR_END_OF_FILE |
||
1967 | mov eax, [esi+INODE.fileSize] |
||
1968 | mov edx, [esi+INODE.fileSizeHigh] |
||
1969 | sub eax, [ebx+4] |
||
1970 | sbb edx, [ebx+8] |
||
1971 | jc .ret |
||
6462 | pathoswith | 1972 | mov ecx, [ebx+12] |
6726 | pathoswith | 1973 | sub eax, ecx |
1974 | sbb edx, 0 |
||
1975 | jc @f |
||
1976 | xor eax, eax |
||
1977 | mov [esp], eax |
||
1978 | @@: |
||
1979 | add ecx, eax |
||
6462 | pathoswith | 1980 | mov eax, [ebx+4] |
1981 | mov edx, [ebx+8] |
||
6726 | pathoswith | 1982 | mov edi, [ebx+16] |
6462 | pathoswith | 1983 | div [ebp+EXTFS.bytesPerBlock] |
6726 | pathoswith | 1984 | test edx, edx |
1985 | jz .aligned |
||
1986 | .piece: |
||
1987 | push eax ecx |
||
1988 | mov esi, edx |
||
6462 | pathoswith | 1989 | mov ecx, eax |
6726 | pathoswith | 1990 | call extfsGetExtent |
1991 | jc .errorGet |
||
1992 | mov ecx, [ebp+EXTFS.sectorsPerBlock] |
||
1993 | mul ecx |
||
6462 | pathoswith | 1994 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
6726 | pathoswith | 1995 | call fs_read64_sys |
1996 | test eax, eax |
||
1997 | jnz .errorRead |
||
1998 | pop eax |
||
1999 | mov ecx, [ebp+EXTFS.bytesPerBlock] |
||
2000 | sub ecx, esi |
||
2001 | sub eax, ecx |
||
2002 | jnc @f |
||
2003 | add ecx, eax |
||
2004 | xor eax, eax |
||
2005 | @@: |
||
2006 | add esi, ebx |
||
2007 | add [esp+8], ecx |
||
6462 | pathoswith | 2008 | rep movsb |
6726 | pathoswith | 2009 | mov ecx, eax |
2010 | pop eax |
||
2011 | inc eax |
||
6462 | pathoswith | 2012 | xor edx, edx |
6726 | pathoswith | 2013 | jecxz .ret |
2014 | .aligned: |
||
2015 | xchg eax, ecx |
||
6462 | pathoswith | 2016 | div [ebp+EXTFS.bytesPerBlock] |
6726 | pathoswith | 2017 | push edx |
2018 | mov edx, eax |
||
2019 | .writeExtent: |
||
2020 | test edx, edx |
||
2021 | jz .end |
||
2022 | push ecx |
||
2023 | call extfsGetExtent |
||
2024 | jc .errorGet |
||
2025 | sub edx, ecx |
||
2026 | jnc @f |
||
2027 | add ecx, edx |
||
2028 | xor edx, edx |
||
6462 | pathoswith | 2029 | @@: |
6726 | pathoswith | 2030 | add [esp], ecx |
2031 | imul ecx, [ebp+EXTFS.sectorsPerBlock] |
||
2032 | mov ebx, edi |
||
2033 | push edx ecx |
||
2034 | mul [ebp+EXTFS.sectorsPerBlock] |
||
2035 | call fs_read64_sys |
||
2036 | pop ecx edx |
||
2037 | test eax, eax |
||
2038 | jnz .errorRead |
||
2039 | shl ecx, 9 |
||
2040 | add edi, ecx |
||
2041 | add [esp+12], ecx |
||
2042 | pop ecx |
||
2043 | jmp .writeExtent |
||
6462 | pathoswith | 2044 | |
6726 | pathoswith | 2045 | .end: |
6462 | pathoswith | 2046 | mov eax, ecx |
6726 | pathoswith | 2047 | pop ecx |
2048 | jecxz .ret |
||
2049 | jmp .piece |
||
6462 | pathoswith | 2050 | |
6726 | pathoswith | 2051 | .errorRead: |
2052 | movi eax, ERROR_DEVICE |
||
2053 | .errorGet: |
||
6462 | pathoswith | 2054 | pop ebx ebx |
6726 | pathoswith | 2055 | mov [esp], eax |
2056 | .ret: |
||
6462 | pathoswith | 2057 | call ext_unlock |
6726 | pathoswith | 2058 | pop eax ebx |
6462 | pathoswith | 2059 | ret |
2060 | |||
2061 | ;---------------------------------------------------------------- |
||
2062 | ext_GetFileInfo: |
||
2063 | call ext_lock |
||
2064 | cmp byte [esi], 0 |
||
2065 | jz .is_root |
||
6468 | pathoswith | 2066 | call findInode |
6558 | pathoswith | 2067 | lea esi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 2068 | jnc @f |
2069 | push eax |
||
2070 | call ext_unlock |
||
2071 | pop eax |
||
2072 | ret |
||
2073 | |||
2074 | .is_root: |
||
6522 | pathoswith | 2075 | mov edi, esi |
6462 | pathoswith | 2076 | lea esi, [ebp+EXTFS.rootInodeBuffer] |
2077 | @@: |
||
6849 | pathoswith | 2078 | mov edx, [ebx+16] |
6522 | pathoswith | 2079 | mov bl, [edi] |
6462 | pathoswith | 2080 | xor eax, eax |
2081 | mov edi, edx |
||
2082 | mov ecx, 40/4 |
||
2083 | rep stosd |
||
2084 | cmp bl, '.' |
||
2085 | jne @f |
||
2086 | or dword [edx], KOS_HIDDEN |
||
2087 | @@: |
||
2088 | or dword [edx], KOS_DIRECTORY |
||
6522 | pathoswith | 2089 | test [esi+INODE.accessMode], FLAG_FILE |
2090 | jz @f |
||
6462 | pathoswith | 2091 | xor dword [edx], KOS_DIRECTORY ; mark as file |
2092 | mov eax, [esi+INODE.fileSize] |
||
2093 | mov ebx, [esi+INODE.fileSizeHigh] |
||
2094 | mov dword [edx+32], eax |
||
2095 | mov dword [edx+36], ebx |
||
2096 | @@: |
||
2097 | lea edi, [edx+8] |
||
2098 | mov eax, [esi+INODE.inodeModified] |
||
2099 | sub eax, 978307200 ; 01.01.1970-01.01.2001 = (365*31+8)*24*60*60 |
||
2100 | call fsTime2bdfe |
||
2101 | |||
2102 | mov eax, [esi+INODE.accessedTime] |
||
2103 | sub eax, 978307200 |
||
2104 | call fsTime2bdfe |
||
2105 | |||
2106 | mov eax, [esi+INODE.dataModified] |
||
2107 | sub eax, 978307200 |
||
2108 | call fsTime2bdfe |
||
2109 | call ext_unlock |
||
2110 | xor eax, eax |
||
2111 | ret |
||
2112 | |||
2113 | ;---------------------------------------------------------------- |
||
2114 | ext_SetFileInfo: |
||
2115 | call extfsWritingInit |
||
6468 | pathoswith | 2116 | call findInode |
6462 | pathoswith | 2117 | jc @f |
6849 | pathoswith | 2118 | push esi |
2119 | mov esi, [ebx+16] |
||
2120 | add esi, 16 |
||
6558 | pathoswith | 2121 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 2122 | call fsCalculateTime |
2123 | add eax, 978307200 ; 01.01.1970-01.01.2001 = (365*31+8)*24*60*60 |
||
2124 | mov [edi+INODE.accessedTime], eax |
||
2125 | |||
2126 | add esi, 8 |
||
2127 | call fsCalculateTime |
||
2128 | add eax, 978307200 |
||
2129 | mov [edi+INODE.dataModified], eax |
||
2130 | mov ebx, edi |
||
2131 | pop eax |
||
2132 | call writeInode |
||
2133 | @@: |
||
2134 | push eax |
||
2135 | jc @f |
||
2136 | call writeSuperblock |
||
2137 | mov esi, [ebp+PARTITION.Disk] |
||
2138 | call disk_sync |
||
2139 | @@: |
||
2140 | call ext_unlock |
||
2141 | pop eax |
||
2142 | ret |
||
2143 | |||
2144 | ;---------------------------------------------------------------- |
||
2145 | ext_Delete: |
||
2146 | call extfsWritingInit |
||
6468 | pathoswith | 2147 | call findInode |
6853 | pathoswith | 2148 | jc .error |
2149 | push ecx |
||
2150 | movzx edi, [ebp+EXTFS.inodeBuffer.accessMode] |
||
2151 | and edi, TYPE_MASK |
||
2152 | cmp edi, DIRECTORY |
||
6462 | pathoswith | 2153 | jne .file |
6726 | pathoswith | 2154 | xor ecx, ecx |
6462 | pathoswith | 2155 | .checkDirectory: |
6726 | pathoswith | 2156 | push ecx |
2157 | call extfsGetExtent |
||
2158 | jc .empty |
||
6462 | pathoswith | 2159 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
2160 | call extfsReadBlock |
||
6853 | pathoswith | 2161 | jc .error8 |
6462 | pathoswith | 2162 | mov edx, ebx |
2163 | add edx, [ebp+EXTFS.bytesPerBlock] |
||
2164 | .dir_entry: |
||
6853 | pathoswith | 2165 | movzx ecx, [ebx+DIRENTRY.nameLength] |
2166 | mov ax, word [ebx+DIRENTRY.name] |
||
2167 | jecxz @f |
||
2168 | cmp al, '.' |
||
2169 | jnz .not_empty |
||
2170 | dec ecx |
||
2171 | jz @f |
||
2172 | cmp al, ah |
||
2173 | jnz .not_empty |
||
2174 | dec ecx |
||
2175 | jnz .not_empty |
||
6462 | pathoswith | 2176 | @@: |
6853 | pathoswith | 2177 | mov cx, [ebx+DIRENTRY.entryLength] |
2178 | jecxz @f |
||
6462 | pathoswith | 2179 | add ebx, ecx |
2180 | cmp ebx, edx |
||
2181 | jb .dir_entry |
||
6853 | pathoswith | 2182 | @@: |
6726 | pathoswith | 2183 | pop ecx |
2184 | inc ecx |
||
6462 | pathoswith | 2185 | jmp .checkDirectory |
2186 | |||
6756 | pathoswith | 2187 | .not_empty: |
2188 | pop eax eax |
||
2189 | push ERROR_ACCESS_DENIED |
||
2190 | jmp .ret |
||
2191 | |||
6853 | pathoswith | 2192 | .error8: |
2193 | pop ebx |
||
2194 | .error4: |
||
2195 | pop ebx |
||
2196 | .error: |
||
2197 | push eax |
||
2198 | jmp .ret |
||
2199 | |||
6462 | pathoswith | 2200 | .empty: |
6853 | pathoswith | 2201 | pop ecx ecx |
6726 | pathoswith | 2202 | cmp eax, ERROR_END_OF_FILE |
6853 | pathoswith | 2203 | jnz .error |
2204 | push ecx |
||
6462 | pathoswith | 2205 | .file: |
6522 | pathoswith | 2206 | mov eax, ecx |
6462 | pathoswith | 2207 | call unlinkInode |
6853 | pathoswith | 2208 | jc .error4 |
2209 | pop eax |
||
2210 | lea ebx, [ebp+EXTFS.inodeBuffer] |
||
2211 | cmp edi, DIRECTORY |
||
2212 | jnz @f |
||
2213 | dec [ebx+INODE.linksCount] |
||
2214 | call writeInode |
||
2215 | @@: |
||
2216 | mov eax, esi |
||
2217 | call readInode |
||
2218 | jc .error |
||
2219 | dec [ebx+INODE.linksCount] |
||
6462 | pathoswith | 2220 | jz @f |
6853 | pathoswith | 2221 | cmp edi, DIRECTORY |
2222 | jnz .hardlinks |
||
6462 | pathoswith | 2223 | @@: |
6853 | pathoswith | 2224 | push esi edi |
6849 | pathoswith | 2225 | xor eax, eax |
2226 | xor edx, edx |
||
6643 | pathoswith | 2227 | call extfsTruncateFile ; free file's data |
6778 | pathoswith | 2228 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
2229 | lea edi, [ebp+EXTFS.inodeBuffer] |
||
6462 | pathoswith | 2230 | xor eax, eax |
6849 | pathoswith | 2231 | push edi |
6462 | pathoswith | 2232 | rep stosb |
2233 | call fsGetTime |
||
6853 | pathoswith | 2234 | pop ebx edi esi |
6462 | pathoswith | 2235 | add eax, 978307200 |
6778 | pathoswith | 2236 | mov [ebx+INODE.deletedTime], eax |
6853 | pathoswith | 2237 | mov eax, esi |
6462 | pathoswith | 2238 | dec eax |
2239 | xor edx, edx |
||
2240 | div [ebp+EXTFS.superblock.inodesPerGroup] |
||
6848 | pathoswith | 2241 | push edx |
2242 | mov ebx, [ebp+EXTFS.descriptorTable] |
||
2243 | shl eax, 5 |
||
2244 | add ebx, eax |
||
6853 | pathoswith | 2245 | cmp edi, DIRECTORY |
6756 | pathoswith | 2246 | jnz @f |
2247 | dec [ebx+BGDESCR.directoriesCount] |
||
2248 | @@: |
||
2249 | inc [ebx+BGDESCR.inodesFree] |
||
6848 | pathoswith | 2250 | push [ebx+BGDESCR.inodeBitmap] |
2251 | call extfsWriteDescriptor |
||
6462 | pathoswith | 2252 | pop eax |
6756 | pathoswith | 2253 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
6848 | pathoswith | 2254 | mov ecx, eax |
6756 | pathoswith | 2255 | call extfsReadBlock |
6853 | pathoswith | 2256 | pop edx |
2257 | jc .error |
||
2258 | mov eax, edx |
||
6756 | pathoswith | 2259 | and edx, 31 |
2260 | shr eax, 5 |
||
2261 | shl eax, 2 |
||
2262 | add eax, ebx |
||
2263 | btr [eax], edx |
||
2264 | mov eax, ecx |
||
2265 | call extfsWriteBlock |
||
2266 | inc [ebp+EXTFS.superblock.inodesFree] |
||
6853 | pathoswith | 2267 | .hardlinks: |
2268 | mov eax, esi |
||
2269 | lea ebx, [ebp+EXTFS.inodeBuffer] |
||
2270 | call writeInode |
||
6462 | pathoswith | 2271 | push eax |
2272 | call writeSuperblock |
||
2273 | mov esi, [ebp+PARTITION.Disk] |
||
2274 | call disk_sync |
||
2275 | .ret: |
||
2276 | call ext_unlock |
||
2277 | xor ebx, ebx |
||
2278 | pop eax |
||
2279 | ret |
||
2280 | |||
2281 | ;---------------------------------------------------------------- |
||
2282 | ext_CreateFolder: |
||
2283 | call extfsWritingInit |
||
6468 | pathoswith | 2284 | call findInode |
6462 | pathoswith | 2285 | jnc .success ; exist |
6522 | pathoswith | 2286 | test edi, edi |
2287 | jz .error |
||
6462 | pathoswith | 2288 | mov eax, esi |
6643 | pathoswith | 2289 | call extfsInodeAlloc |
6462 | pathoswith | 2290 | jc .error |
2291 | push ebx esi edi |
||
6558 | pathoswith | 2292 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 2293 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
6852 | pathoswith | 2294 | xor eax, eax |
6462 | pathoswith | 2295 | rep stosb |
2296 | call fsGetTime |
||
2297 | add eax, 978307200 |
||
6852 | pathoswith | 2298 | lea ebx, [ebp+EXTFS.inodeBuffer] |
2299 | mov [ebx+INODE.accessedTime], eax |
||
2300 | mov [ebx+INODE.dataModified], eax |
||
6462 | pathoswith | 2301 | pop edi esi edx |
2302 | ; edx = allocated inode number, edi -> filename, esi = parent inode number |
||
2303 | mov [ebx+INODE.accessMode], DIRECTORY or PERMISSIONS |
||
2304 | mov eax, edx |
||
2305 | call writeInode |
||
2306 | jc .error |
||
2307 | ; link to self |
||
2308 | push edx esi |
||
2309 | mov eax, edx |
||
2310 | mov ebx, eax |
||
2311 | mov dl, DIR_DIRECTORY |
||
2312 | mov esi, self_link |
||
2313 | call linkInode |
||
2314 | pop esi edx |
||
2315 | jc .error |
||
2316 | ; link to parent |
||
2317 | push edx esi |
||
2318 | mov eax, ebx |
||
2319 | mov ebx, esi |
||
2320 | mov dl, DIR_DIRECTORY |
||
2321 | mov esi, parent_link |
||
2322 | call linkInode |
||
2323 | pop esi edx |
||
2324 | jc .error |
||
2325 | ; link parent to child |
||
2326 | mov eax, esi |
||
2327 | mov ebx, edx |
||
2328 | mov esi, edi |
||
2329 | mov dl, DIR_DIRECTORY |
||
2330 | call linkInode |
||
2331 | jc .error |
||
2332 | mov eax, ebx |
||
2333 | dec eax |
||
2334 | xor edx, edx |
||
2335 | div [ebp+EXTFS.superblock.inodesPerGroup] |
||
6848 | pathoswith | 2336 | mov ebx, [ebp+EXTFS.descriptorTable] |
2337 | shl eax, 5 |
||
2338 | add ebx, eax |
||
6756 | pathoswith | 2339 | inc [ebx+BGDESCR.directoriesCount] |
6462 | pathoswith | 2340 | call extfsWriteDescriptor |
2341 | .success: |
||
2342 | .error: |
||
2343 | push eax |
||
2344 | call writeSuperblock |
||
2345 | mov esi, [ebp+PARTITION.Disk] |
||
2346 | call disk_sync |
||
2347 | call ext_unlock |
||
2348 | pop eax |
||
2349 | ret |
||
2350 | |||
2351 | self_link db ".", 0 |
||
2352 | parent_link db "..", 0 |
||
2353 | |||
2354 | ;---------------------------------------------------------------- |
||
2355 | ext_CreateFile: |
||
2356 | call extfsWritingInit |
||
6726 | pathoswith | 2357 | pushd 0 0 ebx |
6468 | pathoswith | 2358 | call findInode |
6522 | pathoswith | 2359 | jnc .exist |
2360 | test edi, edi |
||
2361 | jz .error |
||
6462 | pathoswith | 2362 | mov eax, esi |
6643 | pathoswith | 2363 | call extfsInodeAlloc |
6462 | pathoswith | 2364 | jc .error |
6522 | pathoswith | 2365 | push ebx ebx esi edi |
6558 | pathoswith | 2366 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 2367 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
6852 | pathoswith | 2368 | xor eax, eax |
6462 | pathoswith | 2369 | rep stosb |
2370 | call fsGetTime |
||
2371 | add eax, 978307200 |
||
6852 | pathoswith | 2372 | lea ebx, [ebp+EXTFS.inodeBuffer] |
2373 | mov [ebx+INODE.accessedTime], eax |
||
2374 | mov [ebx+INODE.dataModified], eax |
||
6462 | pathoswith | 2375 | pop edi esi edx |
2376 | ; edx = allocated inode number, edi -> filename, esi = parent inode number |
||
2377 | mov [ebx+INODE.accessMode], FLAG_FILE or PERMISSIONS |
||
2378 | mov eax, edx |
||
2379 | call writeInode |
||
6522 | pathoswith | 2380 | jc .error2 |
6462 | pathoswith | 2381 | ; link parent to child |
2382 | mov eax, esi |
||
2383 | mov ebx, edx |
||
2384 | mov esi, edi |
||
2385 | mov dl, DIR_FLAG_FILE |
||
2386 | call linkInode |
||
6522 | pathoswith | 2387 | jc .error2 |
6462 | pathoswith | 2388 | pop esi ebx |
6849 | pathoswith | 2389 | mov eax, [ebx+12] |
2390 | xor edx, edx |
||
6522 | pathoswith | 2391 | jmp ext_WriteFile.start |
6462 | pathoswith | 2392 | |
6522 | pathoswith | 2393 | .exist: |
2394 | movi eax, ERROR_ACCESS_DENIED |
||
6726 | pathoswith | 2395 | test [ebp+EXTFS.inodeBuffer.accessMode], FLAG_FILE |
6522 | pathoswith | 2396 | jz .error ; not a file |
2397 | pop ebx |
||
6849 | pathoswith | 2398 | mov eax, [ebx+12] |
2399 | xor edx, edx |
||
2400 | push eax edx ebx esi |
||
6522 | pathoswith | 2401 | call extfsTruncateFile |
6849 | pathoswith | 2402 | pop esi ebx edx eax |
6643 | pathoswith | 2403 | jmp ext_WriteFile.start |
2404 | |||
6522 | pathoswith | 2405 | .error2: |
2406 | pop ebx |
||
6462 | pathoswith | 2407 | .error: |
2408 | push eax |
||
2409 | call ext_unlock |
||
6726 | pathoswith | 2410 | pop eax ebx ebx ebx |
6462 | pathoswith | 2411 | ret |
2412 | |||
2413 | ;---------------------------------------------------------------- |
||
2414 | ext_WriteFile: |
||
2415 | call extfsWritingInit |
||
6468 | pathoswith | 2416 | call findInode |
6726 | pathoswith | 2417 | pushd 0 eax |
2418 | jc .ret |
||
2419 | mov byte [esp], ERROR_ACCESS_DENIED |
||
2420 | test [ebp+EXTFS.inodeBuffer.accessMode], FLAG_FILE |
||
2421 | jz .ret ; not a file |
||
6849 | pathoswith | 2422 | mov byte [esp], 0 |
2423 | mov eax, [ebx+4] |
||
2424 | mov edx, [ebx+8] |
||
2425 | add eax, [ebx+12] |
||
2426 | adc edx, 0 |
||
6522 | pathoswith | 2427 | .start: |
6726 | pathoswith | 2428 | push esi |
6849 | pathoswith | 2429 | mov ecx, esi |
6462 | pathoswith | 2430 | call extfsExtendFile |
6726 | pathoswith | 2431 | jc .errorExtend |
2432 | mov eax, [ebx+4] |
||
6849 | pathoswith | 2433 | mov edx, [ebx+8] |
6643 | pathoswith | 2434 | mov ecx, [ebx+12] |
6726 | pathoswith | 2435 | mov esi, [ebx+16] |
2436 | .write: |
||
6462 | pathoswith | 2437 | div [ebp+EXTFS.bytesPerBlock] |
2438 | test edx, edx |
||
6726 | pathoswith | 2439 | jz .aligned |
2440 | .piece: |
||
2441 | mov ebx, ecx |
||
2442 | mov edi, edx |
||
2443 | mov ecx, eax |
||
2444 | push eax |
||
2445 | call extfsGetExtent |
||
2446 | jc .errorGet |
||
2447 | mov ecx, [ebp+EXTFS.sectorsPerBlock] |
||
2448 | mul ecx |
||
2449 | push ecx eax ebx |
||
2450 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
2451 | call fs_read64_sys |
||
2452 | test eax, eax |
||
2453 | jnz .errorDevice |
||
2454 | pop eax |
||
2455 | mov ecx, [ebp+EXTFS.bytesPerBlock] |
||
2456 | sub ecx, edi |
||
2457 | sub eax, ecx |
||
2458 | jnc @f |
||
2459 | add ecx, eax |
||
2460 | xor eax, eax |
||
6462 | pathoswith | 2461 | @@: |
6726 | pathoswith | 2462 | add edi, ebx |
2463 | add [esp+20], ecx |
||
2464 | rep movsb |
||
6575 | pathoswith | 2465 | mov edi, eax |
6726 | pathoswith | 2466 | pop eax ecx |
6462 | pathoswith | 2467 | xor edx, edx |
6726 | pathoswith | 2468 | call fs_write64_sys |
2469 | mov ecx, edi |
||
2470 | pop eax |
||
2471 | inc eax |
||
6462 | pathoswith | 2472 | xor edx, edx |
6726 | pathoswith | 2473 | jecxz .done |
2474 | .aligned: |
||
2475 | xchg eax, ecx |
||
6462 | pathoswith | 2476 | div [ebp+EXTFS.bytesPerBlock] |
6726 | pathoswith | 2477 | push edx |
2478 | mov edx, eax |
||
2479 | .writeExtent: |
||
2480 | test edx, edx |
||
2481 | jz .end |
||
6462 | pathoswith | 2482 | push ecx |
6726 | pathoswith | 2483 | call extfsGetExtent |
2484 | jc .errorGet2 |
||
2485 | sub edx, ecx |
||
2486 | jnc @f |
||
2487 | add ecx, edx |
||
2488 | xor edx, edx |
||
2489 | @@: |
||
2490 | add [esp], ecx |
||
2491 | imul ecx, [ebp+EXTFS.sectorsPerBlock] |
||
2492 | mov ebx, esi |
||
2493 | push edx ecx |
||
2494 | mul [ebp+EXTFS.sectorsPerBlock] |
||
2495 | call fs_write64_sys |
||
2496 | test eax, eax |
||
2497 | jnz .errorDevice |
||
2498 | pop ebx edx ecx |
||
2499 | shl ebx, 9 |
||
2500 | add esi, ebx |
||
2501 | add [esp+12], ebx |
||
2502 | jmp .writeExtent |
||
2503 | |||
2504 | .end: |
||
2505 | mov eax, ecx |
||
6462 | pathoswith | 2506 | pop ecx |
6726 | pathoswith | 2507 | jecxz .done |
2508 | jmp .piece |
||
2509 | |||
2510 | .errorDevice: |
||
2511 | pop eax eax |
||
2512 | movi eax, ERROR_DEVICE |
||
2513 | .errorGet2: |
||
2514 | pop ebx |
||
2515 | .errorGet: |
||
2516 | pop ebx |
||
2517 | .errorExtend: |
||
2518 | mov [esp+4], eax |
||
2519 | .done: |
||
6558 | pathoswith | 2520 | lea ebx, [ebp+EXTFS.inodeBuffer] |
6726 | pathoswith | 2521 | pop eax |
6462 | pathoswith | 2522 | call writeInode |
6726 | pathoswith | 2523 | add [esp], eax |
6462 | pathoswith | 2524 | call writeSuperblock |
2525 | mov esi, [ebp+PARTITION.Disk] |
||
2526 | call disk_sync |
||
6726 | pathoswith | 2527 | .ret: |
6462 | pathoswith | 2528 | call ext_unlock |
6726 | pathoswith | 2529 | pop eax ebx |
6462 | pathoswith | 2530 | ret |
2531 | |||
6726 | pathoswith | 2532 | .erase: |
6849 | pathoswith | 2533 | push eax eax edi |
6726 | pathoswith | 2534 | mov eax, ebx |
2535 | jmp .write |
||
6462 | pathoswith | 2536 | |
2537 | ;---------------------------------------------------------------- |
||
2538 | ext_SetFileEnd: |
||
2539 | call extfsWritingInit |
||
6468 | pathoswith | 2540 | call findInode |
6643 | pathoswith | 2541 | jc .error2 |
6575 | pathoswith | 2542 | lea edi, [ebp+EXTFS.inodeBuffer] |
2543 | movi eax, ERROR_ACCESS_DENIED |
||
6726 | pathoswith | 2544 | test [edi+INODE.accessMode], FLAG_FILE |
2545 | jz .error2 ; not a file |
||
6849 | pathoswith | 2546 | mov eax, [ebx+4] |
2547 | mov edx, [ebx+8] |
||
6575 | pathoswith | 2548 | mov ebx, [edi+INODE.fileSize] |
6849 | pathoswith | 2549 | mov ecx, [edi+INODE.fileSizeHigh] |
2550 | push esi ecx |
||
2551 | cmp ebx, eax |
||
2552 | sbb ecx, edx |
||
2553 | mov ecx, esi |
||
6726 | pathoswith | 2554 | jnc @f |
6575 | pathoswith | 2555 | call extfsExtendFile |
6849 | pathoswith | 2556 | pop esi |
6575 | pathoswith | 2557 | jc .error |
6849 | pathoswith | 2558 | mov eax, [edi+INODE.fileSize] |
2559 | mov edx, [edi+INODE.fileSizeHigh] |
||
2560 | sub eax, ebx |
||
2561 | sbb edx, esi |
||
2562 | jnz .done |
||
2563 | cmp eax, 1000001h |
||
6726 | pathoswith | 2564 | jnc .done |
6849 | pathoswith | 2565 | push eax |
2566 | stdcall kernel_alloc, eax |
||
6726 | pathoswith | 2567 | pop ecx |
2568 | test eax, eax |
||
2569 | jz .error |
||
2570 | push ecx |
||
2571 | add ecx, 3 |
||
2572 | shr ecx, 2 |
||
6849 | pathoswith | 2573 | mov edx, esi |
6726 | pathoswith | 2574 | mov esi, eax |
6575 | pathoswith | 2575 | mov edi, eax |
2576 | xor eax, eax |
||
6726 | pathoswith | 2577 | rep stosd |
6849 | pathoswith | 2578 | pop ecx edi |
6726 | pathoswith | 2579 | push esi |
2580 | call ext_WriteFile.erase |
||
2581 | call kernel_free |
||
6575 | pathoswith | 2582 | xor eax, eax |
6726 | pathoswith | 2583 | ret |
2584 | |||
6575 | pathoswith | 2585 | @@: |
6726 | pathoswith | 2586 | call extfsTruncateFile |
6849 | pathoswith | 2587 | pop eax |
6575 | pathoswith | 2588 | .done: |
6643 | pathoswith | 2589 | xor eax, eax |
2590 | .error: |
||
2591 | xchg eax, [esp] |
||
6558 | pathoswith | 2592 | lea ebx, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 2593 | call writeInode |
6726 | pathoswith | 2594 | add [esp], eax |
6462 | pathoswith | 2595 | call writeSuperblock |
2596 | mov esi, [ebp+PARTITION.Disk] |
||
2597 | call disk_sync |
||
6726 | pathoswith | 2598 | pop eax |
6643 | pathoswith | 2599 | .error2: |
6726 | pathoswith | 2600 | push eax |
6462 | pathoswith | 2601 | call ext_unlock |
2602 | pop eax |
||
2603 | ret |