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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: 6933 $ |
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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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6933 | pathoswith | 32 | dd ext_Rename |
6462 | pathoswith | 33 | ext_user_functions_end: |
34 | endg |
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35 | |||
36 | struct DIRENTRY |
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37 | inodeNumber dd ? |
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38 | entryLength dw ? |
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39 | nameLength db ? |
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40 | fileType db ? |
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41 | name db ? ; rb [nameLength] |
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42 | ends |
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43 | |||
44 | struct INODE |
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45 | accessMode dw ? |
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46 | UID dw ? |
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47 | fileSize dd ? |
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48 | accessedTime dd ? |
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49 | inodeModified dd ? |
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50 | dataModified dd ? |
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51 | deletedTime dd ? |
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52 | GID dw ? |
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53 | linksCount dw ? |
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54 | sectorsUsed dd ? |
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55 | featureFlags dd ? |
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56 | reserved dd ? |
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57 | blockNumbers rd 12 |
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58 | addressBlock dd ? |
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59 | doubleAddress dd ? |
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60 | tripleAddress dd ? |
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61 | generation dd ? |
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62 | ACL dd ? |
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63 | fileSizeHigh dd ? |
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64 | ends |
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65 | |||
66 | struct BGDESCR ; block group descriptor |
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67 | blockBitmap dd ? |
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68 | inodeBitmap dd ? |
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69 | inodeTable dd ? |
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70 | blocksFree dw ? |
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71 | inodesFree dw ? |
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72 | directoriesCount dw ? |
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73 | reserved rb 14 |
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74 | ends |
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75 | |||
76 | struct SUPERBLOCK |
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77 | inodesTotal dd ? |
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78 | blocksTotal dd ? |
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79 | blocksReserved dd ? |
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80 | blocksFree dd ? |
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81 | inodesFree dd ? |
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82 | firstGroupBlock dd ? |
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83 | sectorsPerBlockLog dd ? ; shift for 1024 |
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84 | fragmentSizeLog dd ? |
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85 | blocksPerGroup dd ? |
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86 | fragmentsPerGroup dd ? |
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87 | inodesPerGroup dd ? |
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88 | lastMountTime dd ? |
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89 | lastWriteTime dd ? |
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90 | mountCount dw ? |
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91 | mountMax dw ? |
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92 | magic dw ? |
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93 | state dw ? |
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94 | errorHandling dw ? |
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95 | additionalVersion dw ? |
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96 | lastCheck dd ? |
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97 | checkInterval dd ? |
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98 | creatorOS dd ? |
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99 | dynamicVersionFlag dd ? |
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100 | reservedUID dw ? |
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101 | reservedGID dw ? |
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102 | firstInode dd ? |
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103 | inodeSize dw ? |
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104 | thisBlockGroup dw ? |
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105 | compatibleFlags dd ? |
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106 | incompatibleFlags dd ? |
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107 | RO_compatibleFlags dd ? |
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6871 | pathoswith | 108 | UUID rb 16 |
109 | volumeLabel rb 16 |
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6462 | pathoswith | 110 | ends |
111 | |||
112 | ; ext4 extent tree |
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113 | struct NODEHEADER ; tree node header |
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114 | magic dw ? ; 0xF30A |
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115 | entriesFolow dw ? |
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116 | entriesMax dw ? |
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117 | currentDepth dw ? |
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118 | generation dd ? |
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119 | ends |
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120 | |||
121 | struct INDEX ; root/branch |
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122 | fileBlock dd ? |
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123 | nodeBlock dd ? |
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124 | nodeBlockHigh dw ? |
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125 | reserved dw ? |
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126 | ends |
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127 | |||
128 | struct EXTENT ; leaf |
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129 | fileBlock dd ? |
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130 | blocksCount dw ? |
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131 | fsBlockHigh dw ? |
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132 | fsBlock dd ? |
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133 | ends |
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134 | |||
135 | ROOT_INODE = 2 |
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136 | EXTENTS_USED = 80000h |
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137 | TYPE_MASK = 0F000h |
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138 | FLAG_FILE = 8000h |
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139 | DIRECTORY = 4000h |
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140 | DIR_FLAG_FILE = 1 |
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141 | DIR_DIRECTORY = 2 |
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142 | KOS_HIDDEN = 2 |
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143 | KOS_DIRECTORY = 10h |
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144 | READ_ONLY = 1 |
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145 | |||
146 | ; Implemented "incompatible" features: |
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147 | ; 2 = have file type in directory entry |
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148 | ; 40h = extents |
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149 | ; 200h = flexible block groups |
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150 | INCOMPATIBLE_SUPPORT = 242h |
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151 | ; Read only support for "incompatible" features: |
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152 | INCOMPATIBLE_READ_SUPPORT = 240h |
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153 | |||
154 | ; Implemented "read-only" features: |
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155 | ; 1 = sparse superblock |
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156 | ; 2 = 64-bit file size |
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157 | READ_ONLY_SUPPORT = 3 |
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158 | |||
159 | struct EXTFS PARTITION |
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160 | Lock MUTEX |
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161 | mountType dd ? |
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162 | bytesPerBlock dd ? |
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163 | sectorsPerBlock dd ? |
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164 | dwordsPerBlock dd ? |
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165 | dwordsPerBranch dd ? ; dwordsPerBlock ^ 2 |
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166 | mainBlockBuffer dd ? |
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167 | tempBlockBuffer dd ? |
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6848 | pathoswith | 168 | descriptorTable dd ? |
169 | descriptorTableEnd dd ? |
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6558 | pathoswith | 170 | align0 rb 200h-EXTFS.align0 |
6462 | pathoswith | 171 | superblock SUPERBLOCK |
6558 | pathoswith | 172 | align1 rb 400h-EXTFS.align1 |
6462 | pathoswith | 173 | rootInodeBuffer INODE |
6558 | pathoswith | 174 | align2 rb 600h-EXTFS.align2 |
175 | inodeBuffer INODE |
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176 | align3 rb 800h-EXTFS.align3 |
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6462 | pathoswith | 177 | ends |
178 | |||
179 | ; mount if it's a valid EXT partition |
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180 | ext2_create_partition: |
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181 | ; in: |
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182 | ; ebp -> PARTITION structure |
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183 | ; ebx -> boot sector |
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184 | ; ebx+512 -> buffer |
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185 | ; out: |
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186 | ; eax -> EXTFS structure, 0 = not EXT |
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187 | push ebx |
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188 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
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189 | jnz .fail |
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190 | mov eax, 2 |
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191 | add ebx, 512 |
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192 | call fs_read32_sys |
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193 | test eax, eax |
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194 | jnz .fail |
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195 | cmp [ebx+SUPERBLOCK.magic], 0xEF53 |
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196 | jne .fail |
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197 | cmp [ebx+SUPERBLOCK.state], 1 |
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6471 | pathoswith | 198 | ja .fail |
6462 | pathoswith | 199 | test [ebx+SUPERBLOCK.incompatibleFlags], not INCOMPATIBLE_SUPPORT |
200 | jnz .fail |
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201 | cmp [ebx+SUPERBLOCK.sectorsPerBlockLog], 6 ; 64KB |
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202 | ja .fail |
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6852 | pathoswith | 203 | cmp [ebx+SUPERBLOCK.inodeSize], 512 |
6462 | pathoswith | 204 | ja .fail |
205 | cmp [ebx+SUPERBLOCK.blocksPerGroup], 0 |
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206 | je .fail |
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207 | cmp [ebx+SUPERBLOCK.inodesPerGroup], 0 |
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208 | je .fail |
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6558 | pathoswith | 209 | movi eax, sizeof.EXTFS |
210 | call malloc |
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6462 | pathoswith | 211 | test eax, eax |
212 | jz .fail |
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213 | mov ecx, dword [ebp+PARTITION.FirstSector] |
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214 | mov dword [eax+EXTFS.FirstSector], ecx |
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215 | mov ecx, dword [ebp+PARTITION.FirstSector+4] |
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216 | mov dword [eax+EXTFS.FirstSector+4], ecx |
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217 | mov ecx, dword [ebp+PARTITION.Length] |
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218 | mov dword [eax+EXTFS.Length], ecx |
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219 | mov ecx, dword [ebp+PARTITION.Length+4] |
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220 | mov dword [eax+EXTFS.Length+4], ecx |
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221 | mov ecx, [ebp+PARTITION.Disk] |
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222 | mov [eax+EXTFS.Disk], ecx |
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223 | mov [eax+EXTFS.FSUserFunctions], ext_user_functions |
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224 | |||
225 | push ebp esi edi |
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226 | mov ebp, eax |
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227 | lea ecx, [eax+EXTFS.Lock] |
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228 | call mutex_init |
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229 | mov esi, ebx |
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230 | lea edi, [ebp+EXTFS.superblock] |
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231 | mov ecx, 512/4 |
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232 | rep movsd ; copy superblock |
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233 | mov ecx, [ebx+SUPERBLOCK.sectorsPerBlockLog] |
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234 | inc ecx |
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235 | mov eax, 1 |
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236 | shl eax, cl |
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237 | mov [ebp+EXTFS.sectorsPerBlock], eax |
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238 | shl eax, 9 |
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239 | mov [ebp+EXTFS.bytesPerBlock], eax |
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240 | shl eax, 1 |
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241 | push eax |
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242 | shr eax, 3 |
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243 | mov [ebp+EXTFS.dwordsPerBlock], eax |
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244 | mul eax |
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245 | mov [ebp+EXTFS.dwordsPerBranch], eax |
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246 | call kernel_alloc |
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247 | test eax, eax |
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248 | jz .error |
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249 | mov [ebp+EXTFS.mainBlockBuffer], eax |
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250 | add eax, [ebp+EXTFS.bytesPerBlock] |
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251 | mov [ebp+EXTFS.tempBlockBuffer], eax |
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252 | mov [ebp+EXTFS.mountType], 0 |
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253 | test [ebx+SUPERBLOCK.RO_compatibleFlags], not READ_ONLY_SUPPORT |
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254 | jnz .read_only |
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255 | test [ebx+SUPERBLOCK.incompatibleFlags], INCOMPATIBLE_READ_SUPPORT |
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256 | jz @f |
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257 | .read_only: |
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258 | or [ebp+EXTFS.mountType], READ_ONLY |
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6848 | pathoswith | 259 | @@: |
260 | mov eax, [ebx+SUPERBLOCK.inodesTotal] |
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261 | dec eax |
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262 | xor edx, edx |
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263 | div [ebx+SUPERBLOCK.inodesPerGroup] |
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264 | inc eax |
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265 | shl eax, 5 |
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266 | push eax eax |
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267 | call kernel_alloc |
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268 | pop ecx |
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269 | test eax, eax |
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270 | jz .error2 |
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271 | mov [ebp+EXTFS.descriptorTable], eax |
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272 | mov ebx, eax |
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273 | add eax, ecx |
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274 | mov [ebp+EXTFS.descriptorTableEnd], eax |
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275 | mov eax, [ebp+EXTFS.superblock.firstGroupBlock] |
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276 | inc eax |
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277 | mul [ebp+EXTFS.sectorsPerBlock] |
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278 | dec ecx |
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279 | shr ecx, 9 |
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280 | inc ecx |
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281 | call fs_read64_sys |
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282 | test eax, eax |
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283 | jnz @f |
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284 | mov al, ROOT_INODE |
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6462 | pathoswith | 285 | lea ebx, [ebp+EXTFS.rootInodeBuffer] |
286 | call readInode |
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287 | test eax, eax |
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288 | jnz @f |
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289 | mov eax, ebp |
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290 | pop edi esi ebp ebx |
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291 | ret |
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292 | |||
293 | @@: |
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6848 | pathoswith | 294 | stdcall kernel_free, [ebp+EXTFS.descriptorTable] |
295 | .error2: |
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6462 | pathoswith | 296 | stdcall kernel_free, [ebp+EXTFS.mainBlockBuffer] |
297 | .error: |
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6558 | pathoswith | 298 | mov eax, ebp |
299 | call free |
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6462 | pathoswith | 300 | pop edi esi ebp |
301 | .fail: |
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302 | pop ebx |
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303 | xor eax, eax |
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304 | ret |
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305 | |||
306 | ; unmount EXT partition |
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307 | ext_free: |
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308 | ; in: eax -> EXTFS structure |
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6848 | pathoswith | 309 | push eax [eax+EXTFS.mainBlockBuffer] |
310 | stdcall kernel_free, [eax+EXTFS.descriptorTable] |
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311 | call kernel_free |
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6558 | pathoswith | 312 | pop eax |
313 | jmp free |
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6462 | pathoswith | 314 | |
315 | extfsWriteBlock: |
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316 | push fs_write64_sys |
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317 | jmp @f |
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6575 | pathoswith | 318 | ; in: eax = block number, ebx -> buffer |
6462 | pathoswith | 319 | extfsReadBlock: |
320 | push fs_read64_sys |
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321 | @@: |
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322 | push ecx edx |
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323 | mov ecx, [ebp+EXTFS.sectorsPerBlock] |
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324 | mul ecx |
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325 | call dword[esp+8] |
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326 | pop edx ecx |
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327 | add esp, 4 |
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328 | test eax, eax |
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329 | jz @f |
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330 | movi eax, ERROR_DEVICE |
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331 | stc |
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332 | @@: |
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333 | ret |
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334 | |||
335 | extfsWriteDescriptor: |
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6848 | pathoswith | 336 | ; in: ebx = block group descriptor |
337 | mov eax, [ebp+EXTFS.superblock.firstGroupBlock] |
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338 | inc eax |
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339 | mul [ebp+EXTFS.sectorsPerBlock] |
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340 | sub ebx, [ebp+EXTFS.descriptorTable] |
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341 | shr ebx, 9 |
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342 | add eax, ebx |
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343 | shl ebx, 9 |
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344 | add ebx, [ebp+EXTFS.descriptorTable] |
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6756 | pathoswith | 345 | call fs_write32_sys |
6462 | pathoswith | 346 | ret |
347 | |||
6756 | pathoswith | 348 | extfsExtentFree: |
349 | ; in: eax = first block number, ecx = extent size |
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350 | push ebx edx edi |
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6462 | pathoswith | 351 | sub eax, [ebp+EXTFS.superblock.firstGroupBlock] |
352 | xor edx, edx |
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6756 | pathoswith | 353 | mov ebx, [ebp+EXTFS.superblock.blocksPerGroup] |
354 | div ebx |
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355 | sub ebx, edx |
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356 | sub ebx, ecx |
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357 | jc .ret |
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6848 | pathoswith | 358 | push edx |
359 | mov ebx, [ebp+EXTFS.descriptorTable] |
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360 | shl eax, 5 |
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361 | add ebx, eax |
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362 | mov eax, ecx |
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363 | mul [ebp+EXTFS.sectorsPerBlock] |
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6756 | pathoswith | 364 | add [ebx+BGDESCR.blocksFree], cx |
6848 | pathoswith | 365 | add [ebp+EXTFS.superblock.blocksFree], ecx |
366 | sub [ebp+EXTFS.inodeBuffer.sectorsUsed], eax |
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367 | push [ebx+BGDESCR.blockBitmap] |
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368 | call extfsWriteDescriptor |
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6575 | pathoswith | 369 | pop eax |
370 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
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6848 | pathoswith | 371 | mov edx, eax |
6462 | pathoswith | 372 | call extfsReadBlock |
373 | pop eax |
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6848 | pathoswith | 374 | jc .ret |
375 | push ebx edx |
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6756 | pathoswith | 376 | mov edi, eax |
377 | shr edi, 5 |
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378 | shl edi, 2 |
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379 | add edi, ebx |
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6774 | pathoswith | 380 | mov edx, ecx |
6756 | pathoswith | 381 | and eax, 31 |
6774 | pathoswith | 382 | jz .aligned |
6756 | pathoswith | 383 | mov ecx, 32 |
384 | sub ecx, eax |
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385 | sub edx, ecx |
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386 | jnc @f |
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387 | add ecx, edx |
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388 | xor edx, edx |
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389 | @@: |
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390 | or ebx, -1 |
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391 | shl ebx, cl |
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392 | not ebx |
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393 | mov ecx, eax |
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394 | shl ebx, cl |
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395 | not ebx |
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396 | and [edi], ebx |
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6774 | pathoswith | 397 | add edi, 4 |
398 | xor eax, eax |
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399 | .aligned: |
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6756 | pathoswith | 400 | mov ecx, edx |
401 | shr ecx, 5 |
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402 | rep stosd |
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6462 | pathoswith | 403 | and edx, 31 |
6774 | pathoswith | 404 | jz @f |
6756 | pathoswith | 405 | mov ecx, edx |
406 | not eax |
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407 | shl eax, cl |
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408 | and [edi], eax |
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409 | @@: |
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410 | pop eax ebx |
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6462 | pathoswith | 411 | call extfsWriteBlock |
6756 | pathoswith | 412 | .ret: |
413 | pop edi edx ebx |
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6643 | pathoswith | 414 | xor eax, eax |
6462 | pathoswith | 415 | ret |
416 | |||
6643 | pathoswith | 417 | extfsInodeAlloc: |
418 | ; in: eax = parent inode number |
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419 | ; out: ebx = allocated inode number |
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6848 | pathoswith | 420 | push ecx edx edi |
6462 | pathoswith | 421 | dec eax |
422 | xor edx, edx |
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423 | div [ebp+EXTFS.superblock.inodesPerGroup] |
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6848 | pathoswith | 424 | mov ebx, [ebp+EXTFS.descriptorTable] |
425 | shl eax, 5 |
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426 | add ebx, eax |
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427 | push ebx |
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6462 | pathoswith | 428 | .test_block_group: |
6848 | pathoswith | 429 | push ebx |
6774 | pathoswith | 430 | cmp [ebx+BGDESCR.blocksFree], 0 |
431 | jz .next |
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6848 | pathoswith | 432 | cmp [ebx+BGDESCR.inodesFree], 0 |
433 | jz .next |
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6756 | pathoswith | 434 | dec [ebx+BGDESCR.inodesFree] |
6848 | pathoswith | 435 | dec [ebp+EXTFS.superblock.inodesFree] |
436 | push [ebx+BGDESCR.inodeBitmap] |
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6575 | pathoswith | 437 | call extfsWriteDescriptor |
6848 | pathoswith | 438 | pop eax |
6575 | pathoswith | 439 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
6848 | pathoswith | 440 | mov edx, eax |
6462 | pathoswith | 441 | mov edi, ebx |
442 | call extfsReadBlock |
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443 | jc .fail |
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6643 | pathoswith | 444 | mov ecx, [ebp+EXTFS.superblock.inodesPerGroup] |
6462 | pathoswith | 445 | or eax, -1 |
446 | shr ecx, 5 |
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447 | repz scasd |
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448 | jz .next |
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449 | sub edi, 4 |
||
450 | mov eax, [edi] |
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451 | not eax |
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452 | bsf eax, eax |
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453 | bts [edi], eax |
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6575 | pathoswith | 454 | sub edi, [ebp+EXTFS.tempBlockBuffer] |
6462 | pathoswith | 455 | shl edi, 3 |
456 | add eax, edi |
||
457 | mov ecx, eax |
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458 | mov eax, edx |
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459 | call extfsWriteBlock |
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6575 | pathoswith | 460 | pop eax |
6848 | pathoswith | 461 | sub eax, [ebp+EXTFS.descriptorTable] |
462 | shr eax, 5 |
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6643 | pathoswith | 463 | mul [ebp+EXTFS.superblock.inodesPerGroup] |
6756 | pathoswith | 464 | lea ebx, [eax+ecx+1] |
6575 | pathoswith | 465 | xor eax, eax |
6756 | pathoswith | 466 | .ret: |
6848 | pathoswith | 467 | pop edi edi edx ecx |
6462 | pathoswith | 468 | ret |
469 | |||
6848 | pathoswith | 470 | .next: ; search forward, then backward |
471 | pop ebx |
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472 | cmp ebx, [esp] |
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473 | jc .backward |
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474 | add ebx, 32 |
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475 | cmp ebx, [ebp+EXTFS.descriptorTableEnd] |
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476 | jc .test_block_group |
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477 | mov ebx, [esp] |
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6462 | pathoswith | 478 | .backward: |
6848 | pathoswith | 479 | sub ebx, 32 |
480 | cmp ebx, [ebp+EXTFS.descriptorTable] |
||
6756 | pathoswith | 481 | jnc .test_block_group |
482 | movi eax, ERROR_DISK_FULL |
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6848 | pathoswith | 483 | push eax |
6756 | pathoswith | 484 | .fail: |
485 | pop edi |
||
486 | jmp .ret |
||
6462 | pathoswith | 487 | |
6643 | pathoswith | 488 | extfsExtentAlloc: |
6756 | pathoswith | 489 | ; in: eax = parent inode number, ecx = blocks max |
490 | ; out: ebx = first block number, ecx = blocks allocated |
||
6643 | pathoswith | 491 | push edx esi edi ecx |
492 | dec eax |
||
493 | xor edx, edx |
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494 | div [ebp+EXTFS.superblock.inodesPerGroup] |
||
6848 | pathoswith | 495 | mov ebx, [ebp+EXTFS.descriptorTable] |
496 | shl eax, 5 |
||
497 | add ebx, eax |
||
498 | push ebx |
||
6643 | pathoswith | 499 | .test_block_group: |
6848 | pathoswith | 500 | push ebx |
501 | cmp [ebx+BGDESCR.blocksFree], 0 |
||
502 | jz .next |
||
6756 | pathoswith | 503 | mov eax, [ebx+BGDESCR.blockBitmap] |
6643 | pathoswith | 504 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
505 | mov edx, eax |
||
506 | mov edi, ebx |
||
507 | call extfsReadBlock |
||
508 | jc .fail |
||
509 | mov ecx, [ebp+EXTFS.superblock.blocksPerGroup] |
||
510 | shr ecx, 5 |
||
511 | or eax, -1 |
||
512 | repz scasd |
||
513 | jz .next |
||
514 | mov esi, edi |
||
515 | sub esi, 4 |
||
516 | push edx ecx |
||
517 | mov eax, [esi] |
||
518 | not eax |
||
519 | bsf ecx, eax |
||
520 | not eax |
||
521 | shr eax, cl |
||
522 | shl eax, cl |
||
6774 | pathoswith | 523 | mov ebx, 32 |
6756 | pathoswith | 524 | bsf ebx, eax |
6643 | pathoswith | 525 | sub ebx, ecx |
526 | mov eax, [esp+16] |
||
527 | cmp ebx, eax |
||
528 | jc @f |
||
529 | mov ebx, eax |
||
530 | @@: |
||
6774 | pathoswith | 531 | or eax, -1 |
532 | cmp ebx, 32 |
||
533 | jz @f |
||
6643 | pathoswith | 534 | xchg ebx, ecx |
535 | shl eax, cl |
||
536 | not eax |
||
537 | xchg ebx, ecx |
||
538 | shl eax, cl |
||
6774 | pathoswith | 539 | @@: |
6643 | pathoswith | 540 | or [esi], eax |
541 | sub esi, [ebp+EXTFS.tempBlockBuffer] |
||
542 | shl esi, 3 |
||
543 | add esi, ecx |
||
544 | mov eax, [esp+16] |
||
545 | sub eax, ebx |
||
546 | mov [esp+16], ebx |
||
547 | add ebx, ecx |
||
548 | pop ecx |
||
549 | test eax, eax |
||
550 | jz .done |
||
551 | cmp ebx, 32 |
||
552 | jnz .done |
||
553 | jecxz .done |
||
554 | mov ebx, eax |
||
555 | shr eax, 5 |
||
556 | inc eax |
||
557 | and ebx, 31 |
||
558 | cmp ecx, eax |
||
559 | jnc @f |
||
560 | mov eax, ecx |
||
561 | mov bl, 32 |
||
562 | @@: |
||
563 | mov ecx, eax |
||
564 | shl eax, 5 |
||
565 | add [esp+12], eax |
||
566 | xor eax, eax |
||
567 | push edi |
||
568 | repz scasd |
||
569 | jz @f |
||
570 | mov eax, [edi-4] |
||
571 | bsf eax, eax |
||
572 | xchg eax, ebx |
||
573 | test ecx, ecx |
||
574 | jnz @f |
||
575 | cmp ebx, eax |
||
576 | jc @f |
||
577 | mov ebx, eax |
||
578 | @@: |
||
579 | inc ecx |
||
580 | shl ecx, 5 |
||
581 | sub ecx, ebx |
||
582 | sub [esp+16], ecx |
||
583 | mov ecx, edi |
||
584 | pop edi |
||
585 | sub ecx, edi |
||
586 | shr ecx, 2 |
||
587 | dec ecx |
||
588 | or eax, -1 |
||
589 | rep stosd |
||
590 | mov ecx, ebx |
||
6859 | pathoswith | 591 | jecxz .done |
6774 | pathoswith | 592 | neg ecx |
593 | add ecx, 32 |
||
594 | shr eax, cl |
||
6643 | pathoswith | 595 | or [edi], eax |
596 | .done: |
||
597 | pop eax |
||
598 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
599 | call extfsWriteBlock |
||
6848 | pathoswith | 600 | mov ebx, [esp] |
6643 | pathoswith | 601 | mov ecx, [esp+8] |
6756 | pathoswith | 602 | sub [ebx+BGDESCR.blocksFree], cx |
6848 | pathoswith | 603 | jnc @f |
604 | mov [ebx+BGDESCR.blocksFree], 0 |
||
605 | @@: |
||
6643 | pathoswith | 606 | sub [ebp+EXTFS.superblock.blocksFree], ecx |
607 | call extfsWriteDescriptor |
||
608 | pop eax ebx |
||
6848 | pathoswith | 609 | sub eax, [ebp+EXTFS.descriptorTable] |
610 | shr eax, 5 |
||
6643 | pathoswith | 611 | mul [ebp+EXTFS.superblock.blocksPerGroup] |
612 | mov ebx, eax |
||
613 | add ebx, esi |
||
6756 | pathoswith | 614 | add ebx, [ebp+EXTFS.superblock.firstGroupBlock] |
615 | pop ecx |
||
616 | mov eax, ecx |
||
617 | mul [ebp+EXTFS.sectorsPerBlock] |
||
618 | add [ebp+EXTFS.inodeBuffer.sectorsUsed], eax |
||
6643 | pathoswith | 619 | xor eax, eax |
620 | .ret: |
||
621 | pop edi esi edx |
||
622 | ret |
||
623 | |||
624 | .next: ; search forward, then backward |
||
6848 | pathoswith | 625 | pop ebx |
626 | cmp ebx, [esp] |
||
6643 | pathoswith | 627 | jc .backward |
6848 | pathoswith | 628 | add ebx, 32 |
629 | cmp ebx, [ebp+EXTFS.descriptorTableEnd] |
||
630 | jc .test_block_group |
||
631 | mov ebx, [esp] |
||
6643 | pathoswith | 632 | .backward: |
6848 | pathoswith | 633 | sub ebx, 32 |
634 | cmp ebx, [ebp+EXTFS.descriptorTable] |
||
635 | jnc .test_block_group |
||
636 | movi eax, ERROR_DISK_FULL |
||
6643 | pathoswith | 637 | push eax |
6756 | pathoswith | 638 | .fail: |
639 | add esp, 12 |
||
6643 | pathoswith | 640 | xor ecx, ecx |
6756 | pathoswith | 641 | stc |
6643 | pathoswith | 642 | jmp .ret |
643 | |||
6726 | pathoswith | 644 | extfsGetExtent: |
645 | ; in: ecx = starting file block |
||
646 | ; out: eax = first block number, ecx = extent size |
||
647 | push ebx edx esi |
||
648 | lea esi, [ebp+EXTFS.inodeBuffer] |
||
6462 | pathoswith | 649 | test [esi+INODE.featureFlags], EXTENTS_USED |
650 | jz .listTreeSearch |
||
651 | add esi, INODE.blockNumbers |
||
652 | .extentTreeSearch: |
||
653 | cmp word [esi+NODEHEADER.magic], 0xF30A |
||
654 | jne .fail |
||
655 | movzx ebx, [esi+NODEHEADER.entriesFolow] |
||
656 | add esi, sizeof.NODEHEADER |
||
6726 | pathoswith | 657 | test ebx, ebx |
658 | jz .noBlock |
||
6462 | pathoswith | 659 | cmp word [esi-sizeof.NODEHEADER+NODEHEADER.currentDepth], 0 |
660 | je .leaf_block |
||
6726 | pathoswith | 661 | dec ebx |
662 | jz .end_search_index |
||
6462 | pathoswith | 663 | @@: |
664 | cmp ecx, [esi+sizeof.INDEX+INDEX.fileBlock] |
||
665 | jb .end_search_index |
||
666 | add esi, sizeof.INDEX |
||
667 | dec ebx |
||
6726 | pathoswith | 668 | jnz @b |
6462 | pathoswith | 669 | .end_search_index: |
670 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
671 | mov eax, [esi+INDEX.nodeBlock] |
||
672 | call extfsReadBlock |
||
6726 | pathoswith | 673 | jc .fail2 |
6462 | pathoswith | 674 | mov esi, ebx |
675 | jmp .extentTreeSearch |
||
676 | |||
6726 | pathoswith | 677 | .fail: |
678 | movi eax, ERROR_FS_FAIL |
||
679 | jmp .fail2 |
||
680 | |||
6462 | pathoswith | 681 | .leaf_block: |
6726 | pathoswith | 682 | movzx edx, [esi+EXTENT.blocksCount] |
683 | add edx, [esi+EXTENT.fileBlock] |
||
684 | sub edx, ecx |
||
685 | ja .end_search_extent |
||
6462 | pathoswith | 686 | add esi, sizeof.EXTENT |
687 | dec ebx |
||
6726 | pathoswith | 688 | jnz .leaf_block |
689 | .noBlock: |
||
690 | movi eax, ERROR_END_OF_FILE |
||
691 | .fail2: |
||
692 | pop esi edx ebx |
||
693 | stc |
||
694 | ret |
||
6462 | pathoswith | 695 | |
696 | .end_search_extent: |
||
697 | sub ecx, [esi+EXTENT.fileBlock] |
||
6726 | pathoswith | 698 | jc .fail |
6462 | pathoswith | 699 | add ecx, [esi+EXTENT.fsBlock] |
6726 | pathoswith | 700 | mov eax, ecx |
701 | mov ecx, edx |
||
702 | pop esi edx ebx |
||
6462 | pathoswith | 703 | ret |
704 | |||
705 | .listTreeSearch: |
||
706 | cmp ecx, 12 |
||
707 | jb .get_direct_block |
||
708 | sub ecx, 12 |
||
709 | cmp ecx, [ebp+EXTFS.dwordsPerBlock] |
||
710 | jb .get_indirect_block |
||
711 | sub ecx, [ebp+EXTFS.dwordsPerBlock] |
||
712 | cmp ecx, [ebp+EXTFS.dwordsPerBranch] |
||
713 | jb .get_double_indirect_block |
||
714 | ; triply-indirect blocks |
||
715 | sub ecx, [ebp+EXTFS.dwordsPerBranch] |
||
716 | mov eax, [esi+INODE.tripleAddress] |
||
6558 | pathoswith | 717 | test eax, eax |
718 | jz .noBlock |
||
6462 | pathoswith | 719 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
720 | call extfsReadBlock |
||
721 | jc .fail2 |
||
722 | xor edx, edx |
||
723 | mov eax, ecx |
||
724 | div [ebp+EXTFS.dwordsPerBranch] |
||
725 | ; eax = number in triply-indirect block, edx = number in branch |
||
726 | mov eax, [ebx+eax*4] |
||
727 | test eax, eax |
||
6558 | pathoswith | 728 | jz .noBlock |
6462 | pathoswith | 729 | call extfsReadBlock |
730 | jc .fail2 |
||
731 | mov eax, edx |
||
732 | jmp @f |
||
733 | |||
6726 | pathoswith | 734 | .get_direct_block: |
735 | mov edx, ecx |
||
736 | mov cl, 12 |
||
737 | lea ebx, [esi+INODE.blockNumbers] |
||
738 | jmp .calculateExtent |
||
6462 | pathoswith | 739 | |
6726 | pathoswith | 740 | .get_indirect_block: |
741 | mov eax, [esi+INODE.addressBlock] |
||
742 | test eax, eax |
||
743 | jz .noBlock |
||
744 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
745 | call extfsReadBlock |
||
746 | jc .fail2 |
||
747 | mov edx, ecx |
||
748 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
749 | jmp .calculateExtent |
||
750 | |||
6462 | pathoswith | 751 | .get_double_indirect_block: |
752 | mov eax, [esi+INODE.doubleAddress] |
||
753 | test eax, eax |
||
6558 | pathoswith | 754 | jz .noBlock |
6462 | pathoswith | 755 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
756 | call extfsReadBlock |
||
757 | jc .fail2 |
||
758 | mov eax, ecx |
||
759 | @@: |
||
760 | xor edx, edx |
||
6726 | pathoswith | 761 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
762 | div ecx |
||
6462 | pathoswith | 763 | ; eax = number in doubly-indirect block, edx = number in indirect block |
764 | mov eax, [ebx+eax*4] |
||
765 | test eax, eax |
||
6558 | pathoswith | 766 | jz .noBlock |
6462 | pathoswith | 767 | call extfsReadBlock |
768 | jc .fail2 |
||
6726 | pathoswith | 769 | .calculateExtent: |
770 | lea esi, [ebx+edx*4] |
||
771 | lodsd |
||
6756 | pathoswith | 772 | test eax, eax |
773 | jz .noBlock |
||
6726 | pathoswith | 774 | mov ebx, eax |
775 | sub ecx, edx |
||
776 | xor edx, edx |
||
777 | @@: |
||
778 | inc edx |
||
779 | dec ecx |
||
6462 | pathoswith | 780 | jz @f |
6726 | pathoswith | 781 | lodsd |
782 | sub eax, ebx |
||
783 | sub eax, edx |
||
6462 | pathoswith | 784 | jz @b |
785 | @@: |
||
6726 | pathoswith | 786 | mov eax, ebx |
787 | mov ecx, edx |
||
788 | pop esi edx ebx |
||
789 | clc |
||
6462 | pathoswith | 790 | ret |
791 | |||
792 | getInodeLocation: |
||
793 | ; in: eax = inode number |
||
6756 | pathoswith | 794 | ; out: eax = inode sector, edx = offset in sector |
6462 | pathoswith | 795 | dec eax |
796 | xor edx, edx |
||
797 | div [ebp+EXTFS.superblock.inodesPerGroup] |
||
6848 | pathoswith | 798 | shl eax, 5 |
799 | add eax, [ebp+EXTFS.descriptorTable] |
||
800 | mov ebx, [eax+BGDESCR.inodeTable] |
||
801 | imul ebx, [ebp+EXTFS.sectorsPerBlock] |
||
6809 | pathoswith | 802 | movzx eax, [ebp+EXTFS.superblock.inodeSize] |
803 | mul edx |
||
6462 | pathoswith | 804 | mov edx, eax |
805 | shr eax, 9 |
||
806 | and edx, 511 |
||
6756 | pathoswith | 807 | add eax, ebx |
6462 | pathoswith | 808 | ret |
809 | |||
810 | writeInode: |
||
6575 | pathoswith | 811 | ; in: eax = inode number, ebx -> inode data |
6462 | pathoswith | 812 | push edx edi esi ecx ebx eax |
813 | mov edi, ebx |
||
814 | call fsGetTime |
||
815 | add eax, 978307200 |
||
816 | mov [edi+INODE.inodeModified], eax |
||
817 | pop eax |
||
6774 | pathoswith | 818 | cmp eax, ROOT_INODE |
819 | jnz @f |
||
820 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
||
821 | mov esi, edi |
||
6852 | pathoswith | 822 | lea edi, [ebp+EXTFS.rootInodeBuffer] |
6774 | pathoswith | 823 | rep movsb |
824 | @@: |
||
6462 | pathoswith | 825 | call getInodeLocation |
826 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
827 | mov ecx, eax |
||
828 | call fs_read32_sys |
||
829 | test eax, eax |
||
830 | jnz @f |
||
831 | mov eax, ecx |
||
832 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
||
833 | mov edi, edx |
||
834 | add edi, ebx |
||
6774 | pathoswith | 835 | mov esi, [esp] |
6462 | pathoswith | 836 | rep movsb |
837 | call fs_write32_sys |
||
838 | .ret: |
||
839 | pop ebx ecx esi edi edx |
||
840 | ret |
||
841 | |||
842 | @@: |
||
843 | movi eax, ERROR_DEVICE |
||
844 | stc |
||
845 | jmp .ret |
||
846 | |||
847 | readInode: |
||
6575 | pathoswith | 848 | ; in: eax = inode number, ebx -> inode buffer |
6462 | pathoswith | 849 | push edx edi esi ecx ebx |
850 | mov edi, ebx |
||
851 | call getInodeLocation |
||
852 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
853 | call fs_read32_sys |
||
854 | test eax, eax |
||
855 | jnz @b |
||
856 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
||
857 | mov esi, edx |
||
858 | add esi, ebx |
||
859 | rep movsb |
||
860 | xor eax, eax |
||
861 | pop ebx ecx esi edi edx |
||
862 | ret |
||
863 | |||
6643 | pathoswith | 864 | indirectBlockAlloc: |
865 | ; in: |
||
866 | ; edi -> indirect block number |
||
867 | ; ebx = starting extent block |
||
868 | ; ecx = extent size |
||
869 | ; edx = starting file block |
||
870 | mov eax, [edi] |
||
871 | test eax, eax |
||
872 | jz .newBlock |
||
873 | push edi ebx ecx |
||
874 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
875 | call extfsReadBlock |
||
876 | jc .err2 |
||
877 | lea edi, [ebx+edx*4] |
||
878 | test edx, edx |
||
879 | jz @f |
||
880 | cmp dword[edi-4], 0 |
||
881 | jnz @f |
||
882 | pop ecx ebx edi |
||
883 | .err: |
||
884 | mov al, ERROR_FS_FAIL |
||
885 | stc |
||
886 | ret |
||
887 | |||
888 | .err2: |
||
889 | pop ecx ebx edi |
||
890 | ret |
||
891 | |||
892 | .newBlock: |
||
893 | test edx, edx |
||
894 | jnz .err |
||
895 | mov [edi], ebx |
||
896 | inc ebx |
||
897 | dec ecx |
||
898 | push edi ebx ecx |
||
899 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
900 | mov edi, [ebp+EXTFS.tempBlockBuffer] |
||
901 | push edi |
||
902 | rep stosd |
||
903 | pop edi |
||
904 | @@: |
||
905 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
906 | sub ecx, edx |
||
907 | pop ebx eax |
||
908 | sub ebx, ecx |
||
909 | jnc @f |
||
910 | add ecx, ebx |
||
911 | xor ebx, ebx |
||
912 | @@: |
||
913 | jecxz .done |
||
914 | add edx, ecx |
||
915 | @@: |
||
916 | stosd |
||
917 | inc eax |
||
918 | loop @b |
||
919 | .done: |
||
920 | pop edi |
||
921 | push eax ebx |
||
922 | mov eax, [edi] |
||
923 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
924 | call extfsWriteBlock |
||
925 | pop ecx ebx |
||
926 | ret |
||
927 | |||
928 | doublyIndirectBlockAlloc: |
||
929 | ; in: |
||
930 | ; edi -> indirect block number |
||
931 | ; edx = starting file block |
||
932 | ; ebx = starting extent block |
||
933 | ; ecx = extent size |
||
934 | ; [esp+4] = rest of size |
||
935 | ; [esp+8] = parent inode number |
||
936 | mov eax, [edi] |
||
937 | test eax, eax |
||
938 | jz .newBlock |
||
939 | push edi ecx ebx |
||
940 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
941 | call extfsReadBlock |
||
942 | jc .err2 |
||
943 | mov eax, edx |
||
944 | xor edx, edx |
||
945 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
946 | div ecx |
||
947 | lea edi, [ebx+eax*4] |
||
948 | pop ebx |
||
949 | test eax, eax |
||
950 | jz @f |
||
951 | cmp dword[edi-4], 0 |
||
952 | jnz @f |
||
953 | pop ecx edi |
||
954 | .err: |
||
955 | mov al, ERROR_FS_FAIL |
||
956 | stc |
||
957 | ret |
||
958 | |||
959 | .err2: |
||
960 | pop ebx ecx edi |
||
961 | ret |
||
962 | |||
963 | .newBlock: |
||
964 | test edx, edx |
||
965 | jnz .err |
||
966 | mov [edi], ebx |
||
967 | inc ebx |
||
968 | dec ecx |
||
969 | inc dword[esp+4] |
||
970 | push edi ecx |
||
971 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
972 | mov edi, [ebp+EXTFS.mainBlockBuffer] |
||
973 | push ecx edi |
||
974 | rep stosd |
||
975 | pop edi ecx |
||
976 | @@: |
||
977 | sub ecx, eax |
||
978 | xchg [esp], ecx |
||
979 | .loop: |
||
980 | cmp dword[edi], 0 |
||
981 | jnz @f |
||
982 | inc dword[esp+12] |
||
983 | @@: |
||
984 | jecxz .extentAlloc |
||
985 | call indirectBlockAlloc |
||
986 | jc .end |
||
987 | cmp edx, [ebp+EXTFS.dwordsPerBlock] |
||
988 | jnz @b |
||
989 | add edi, 4 |
||
990 | xor edx, edx |
||
991 | dec dword[esp] |
||
992 | jnz .loop |
||
993 | .end: |
||
994 | pop edi edi |
||
995 | push ebx eax |
||
996 | mov eax, [edi] |
||
997 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
998 | call extfsWriteBlock |
||
999 | pop ebx |
||
1000 | add eax, ebx |
||
1001 | xor ebx, ebx |
||
1002 | cmp ebx, eax |
||
1003 | pop ebx |
||
1004 | ret |
||
1005 | |||
1006 | .extentAlloc: |
||
1007 | mov ecx, [esp+12] |
||
1008 | xor eax, eax |
||
1009 | jecxz .end |
||
1010 | mov eax, [esp+16] |
||
1011 | call extfsExtentAlloc |
||
1012 | jc .end |
||
1013 | sub [esp+12], ecx |
||
1014 | jmp @b |
||
1015 | |||
6462 | pathoswith | 1016 | extfsExtendFile: |
1017 | ; in: |
||
6558 | pathoswith | 1018 | ; [ebp+EXTFS.inodeBuffer] = inode |
6849 | pathoswith | 1019 | ; ecx = inode number |
1020 | ; edx:eax = new size |
||
1021 | push ebx esi edi ecx |
||
6575 | pathoswith | 1022 | lea esi, [ebp+EXTFS.inodeBuffer] |
6849 | pathoswith | 1023 | mov ebx, [esi+INODE.fileSize] |
1024 | mov ecx, [esi+INODE.fileSizeHigh] |
||
1025 | cmp ebx, eax |
||
1026 | sbb ecx, edx |
||
6643 | pathoswith | 1027 | jnc .ret |
6849 | pathoswith | 1028 | mov ecx, [esi+INODE.fileSizeHigh] |
6643 | pathoswith | 1029 | mov [esi+INODE.fileSize], eax |
6849 | pathoswith | 1030 | mov [esi+INODE.fileSizeHigh], edx |
1031 | sub eax, 1 |
||
1032 | sbb edx, 0 |
||
1033 | div [ebp+EXTFS.bytesPerBlock] |
||
6643 | pathoswith | 1034 | inc eax |
6849 | pathoswith | 1035 | xchg eax, ebx |
1036 | mov edx, ecx |
||
1037 | sub eax, 1 |
||
1038 | sbb edx, 0 |
||
6643 | pathoswith | 1039 | jc @f |
6849 | pathoswith | 1040 | div [ebp+EXTFS.bytesPerBlock] |
6643 | pathoswith | 1041 | @@: |
6849 | pathoswith | 1042 | inc eax |
1043 | sub ebx, eax |
||
6643 | pathoswith | 1044 | jz .ret |
6849 | pathoswith | 1045 | push ebx |
1046 | mov edx, eax |
||
6643 | pathoswith | 1047 | @@: |
1048 | mov ecx, [esp] |
||
1049 | mov eax, [esp+4] |
||
1050 | test ecx, ecx |
||
1051 | jz .done |
||
1052 | call extfsExtentAlloc |
||
1053 | jc .errDone |
||
1054 | sub [esp], ecx |
||
1055 | cmp edx, 12 |
||
1056 | jc .directBlocks |
||
1057 | sub edx, 12 |
||
1058 | cmp edx, [ebp+EXTFS.dwordsPerBlock] |
||
1059 | jc .indirectBlocks |
||
1060 | sub edx, [ebp+EXTFS.dwordsPerBlock] |
||
1061 | cmp edx, [ebp+EXTFS.dwordsPerBranch] |
||
1062 | jc .doublyIndirectBlock |
||
1063 | sub edx, [ebp+EXTFS.dwordsPerBranch] |
||
1064 | jmp .triplyIndirectBlock |
||
1065 | |||
1066 | .newExtent: |
||
1067 | jmp @b |
||
1068 | |||
1069 | .directBlocks: |
||
1070 | lea edi, [esi+INODE.blockNumbers+edx*4] |
||
1071 | test edx, edx |
||
1072 | jz @f |
||
1073 | cmp dword[edi-4], 0 |
||
1074 | jz .errDone |
||
6575 | pathoswith | 1075 | @@: |
1076 | mov eax, ebx |
||
6643 | pathoswith | 1077 | mov ebx, ecx |
1078 | mov ecx, 12 |
||
1079 | sub ecx, edx |
||
1080 | sub ebx, ecx |
||
1081 | jnc @f |
||
1082 | add ecx, ebx |
||
1083 | xor ebx, ebx |
||
1084 | @@: |
||
1085 | add edx, ecx |
||
1086 | @@: |
||
1087 | stosd |
||
1088 | inc eax |
||
1089 | loop @b |
||
1090 | mov ecx, ebx |
||
1091 | mov ebx, eax |
||
1092 | jecxz .newExtent |
||
6462 | pathoswith | 1093 | xor edx, edx |
6643 | pathoswith | 1094 | .indirectBlocks: |
1095 | lea edi, [esi+INODE.addressBlock] |
||
1096 | cmp dword[edi], 0 |
||
1097 | jnz @f |
||
1098 | inc dword[esp] |
||
1099 | @@: |
||
1100 | call indirectBlockAlloc |
||
1101 | jc .errDone |
||
1102 | add edx, 12 |
||
1103 | jecxz .newExtent |
||
1104 | xor edx, edx |
||
1105 | .doublyIndirectBlock: |
||
1106 | lea edi, [esi+INODE.doubleAddress] |
||
1107 | call doublyIndirectBlockAlloc |
||
1108 | jc .errDone |
||
1109 | mov edx, [ebp+EXTFS.dwordsPerBranch] |
||
1110 | add edx, [ebp+EXTFS.dwordsPerBlock] |
||
1111 | add edx, 12 |
||
1112 | jecxz .newExtent |
||
1113 | xor edx, edx |
||
1114 | .triplyIndirectBlock: |
||
1115 | push ecx ebx edx |
||
1116 | stdcall kernel_alloc, [ebp+EXTFS.bytesPerBlock] |
||
1117 | pop edx |
||
1118 | mov esi, eax |
||
1119 | mov eax, [ebp+EXTFS.inodeBuffer.tripleAddress] |
||
1120 | test eax, eax |
||
1121 | jz .newBlock |
||
1122 | mov ebx, esi |
||
1123 | call extfsReadBlock |
||
1124 | pop ebx ecx |
||
1125 | jc .errFree |
||
1126 | mov eax, edx |
||
1127 | xor edx, edx |
||
1128 | div [ebp+EXTFS.dwordsPerBranch] |
||
1129 | lea edi, [esi+eax*4] |
||
1130 | test eax, eax |
||
1131 | jz @f |
||
1132 | cmp dword[edi-4], 0 |
||
1133 | jnz @f |
||
1134 | mov al, ERROR_FS_FAIL |
||
1135 | .errFree: |
||
1136 | push ecx eax |
||
1137 | stdcall kernel_free, esi |
||
1138 | pop eax ecx |
||
1139 | .errDone: |
||
1140 | imul ecx, [ebp+EXTFS.sectorsPerBlock] |
||
1141 | sub [ebp+EXTFS.inodeBuffer.sectorsUsed], ecx |
||
1142 | pop ebx |
||
1143 | imul ebx, [ebp+EXTFS.sectorsPerBlock] |
||
6575 | pathoswith | 1144 | add ebx, ecx |
6643 | pathoswith | 1145 | shl ebx, 9 |
1146 | sub [ebp+EXTFS.inodeBuffer.fileSize], ebx |
||
1147 | stc |
||
1148 | jmp .ret |
||
1149 | |||
1150 | .newBlock: |
||
1151 | pop ebx ecx |
||
1152 | mov al, ERROR_FS_FAIL |
||
1153 | test edx, edx |
||
1154 | jnz .errFree |
||
1155 | mov [ebp+EXTFS.inodeBuffer.tripleAddress], ebx |
||
1156 | inc ebx |
||
1157 | dec ecx |
||
1158 | inc dword[esp] |
||
1159 | push ecx |
||
1160 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
1161 | mov edi, esi |
||
1162 | xor eax, eax |
||
1163 | rep stosd |
||
1164 | mov edi, esi |
||
1165 | pop ecx |
||
1166 | @@: |
||
1167 | jecxz .extentAlloc |
||
1168 | call doublyIndirectBlockAlloc |
||
1169 | jc .errSave |
||
1170 | add edi, 4 |
||
1171 | jmp @b |
||
1172 | |||
1173 | .extentAlloc: |
||
1174 | mov ecx, [esp] |
||
1175 | mov eax, [esp+4] |
||
1176 | jecxz @f |
||
1177 | call extfsExtentAlloc |
||
1178 | jc .errSave |
||
1179 | sub [esp], ecx |
||
1180 | jmp @b |
||
1181 | |||
1182 | @@: |
||
1183 | mov eax, [ebp+EXTFS.inodeBuffer.tripleAddress] |
||
1184 | mov ebx, esi |
||
1185 | call extfsWriteBlock |
||
1186 | stdcall kernel_free, esi |
||
6558 | pathoswith | 1187 | .done: |
6462 | pathoswith | 1188 | xor eax, eax |
6643 | pathoswith | 1189 | pop edi |
6462 | pathoswith | 1190 | .ret: |
6849 | pathoswith | 1191 | pop edi edi esi ebx |
6462 | pathoswith | 1192 | ret |
1193 | |||
6643 | pathoswith | 1194 | .errSave: |
1195 | push eax |
||
1196 | mov eax, [ebp+EXTFS.inodeBuffer.tripleAddress] |
||
1197 | mov ebx, esi |
||
1198 | call extfsWriteBlock |
||
1199 | pop eax |
||
1200 | jmp .errFree |
||
1201 | |||
6856 | pathoswith | 1202 | freeBlockList: |
1203 | ; in: edi -> list of blocks, edx = amount of blocks |
||
1204 | ; out: ebx=0 -> end of list |
||
6756 | pathoswith | 1205 | mov ebx, [edi] |
1206 | test ebx, ebx |
||
6856 | pathoswith | 1207 | jz .ret |
6756 | pathoswith | 1208 | xor eax, eax |
6643 | pathoswith | 1209 | xor ecx, ecx |
1210 | @@: |
||
1211 | stosd |
||
6756 | pathoswith | 1212 | inc ecx |
6643 | pathoswith | 1213 | dec edx |
6756 | pathoswith | 1214 | jz @f |
1215 | mov eax, [edi] |
||
1216 | sub eax, ebx |
||
1217 | sub eax, ecx |
||
1218 | jz @b |
||
1219 | @@: |
||
1220 | mov eax, ebx |
||
1221 | call extfsExtentFree |
||
1222 | test edx, edx |
||
6856 | pathoswith | 1223 | jnz freeBlockList |
1224 | .ret: |
||
1225 | ret |
||
1226 | |||
1227 | freeIndirectBlock: |
||
1228 | ; in: edi -> indirect block number, edx = starting block |
||
1229 | ; out: edi = edi+4, eax=0 -> end |
||
1230 | pushd ecx 0 edi edx |
||
1231 | mov eax, [edi] |
||
1232 | test eax, eax |
||
1233 | jz .ret |
||
1234 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
1235 | call extfsReadBlock |
||
1236 | jc .ret |
||
1237 | lea edi, [ebx+edx*4] |
||
1238 | neg edx |
||
1239 | add edx, [ebp+EXTFS.dwordsPerBlock] |
||
1240 | call freeBlockList |
||
1241 | test ebx, ebx |
||
1242 | jz @f |
||
1243 | inc dword[esp+8] |
||
1244 | @@: |
||
6643 | pathoswith | 1245 | pop edx edi |
1246 | mov eax, [edi] |
||
1247 | test edx, edx |
||
1248 | jnz @f |
||
6756 | pathoswith | 1249 | xor ecx, ecx |
1250 | inc ecx |
||
1251 | call extfsExtentFree |
||
6643 | pathoswith | 1252 | stosd |
1253 | jmp .done |
||
1254 | |||
1255 | @@: |
||
6756 | pathoswith | 1256 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
6643 | pathoswith | 1257 | call extfsWriteBlock |
1258 | add edi, 4 |
||
1259 | .done: |
||
1260 | pop eax ecx |
||
1261 | xor edx, edx |
||
1262 | ret |
||
1263 | |||
1264 | .ret: |
||
1265 | pop edi edi edx ecx |
||
1266 | ret |
||
1267 | |||
1268 | freeDoublyIndirectBlock: |
||
1269 | ; in: edi -> doubly-indirect block number, edx = starting block |
||
1270 | ; out: edi = edi+4, eax=-1 -> done, eax=0 -> end |
||
1271 | mov eax, [edi] |
||
1272 | test eax, eax |
||
1273 | jz .ret |
||
1274 | push ecx eax edx |
||
1275 | stdcall kernel_alloc, [ebp+EXTFS.bytesPerBlock] |
||
1276 | mov ebx, eax |
||
1277 | pop edx eax |
||
1278 | pushd 0 ebx edx |
||
1279 | call extfsReadBlock |
||
1280 | jc .err |
||
1281 | mov eax, edx |
||
1282 | xor edx, edx |
||
1283 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
1284 | div ecx |
||
1285 | sub ecx, eax |
||
1286 | push edi |
||
1287 | lea edi, [ebx+eax*4] |
||
1288 | @@: |
||
1289 | call freeIndirectBlock |
||
1290 | test eax, eax |
||
1291 | jz .end |
||
1292 | dec ecx |
||
1293 | jnz @b |
||
1294 | dec dword[esp+12] |
||
1295 | .end: |
||
1296 | pop edi edx |
||
1297 | mov eax, [edi] |
||
1298 | test edx, edx |
||
1299 | jnz @f |
||
1300 | xor ecx, ecx |
||
6756 | pathoswith | 1301 | inc ecx |
1302 | call extfsExtentFree |
||
6643 | pathoswith | 1303 | stosd |
1304 | jmp .done |
||
1305 | |||
1306 | @@: |
||
1307 | mov ebx, [esp] |
||
1308 | call extfsWriteBlock |
||
1309 | add edi, 4 |
||
1310 | jmp .done |
||
1311 | |||
1312 | .err: |
||
1313 | mov [esp+8], eax |
||
1314 | pop eax |
||
1315 | .done: |
||
1316 | call kernel_free |
||
1317 | pop eax ecx |
||
1318 | .ret: |
||
1319 | xor edx, edx |
||
1320 | ret |
||
1321 | |||
6462 | pathoswith | 1322 | extfsTruncateFile: |
6849 | pathoswith | 1323 | ; in: edx:eax = new size, [ebp+EXTFS.inodeBuffer] = inode |
6575 | pathoswith | 1324 | lea esi, [ebp+EXTFS.inodeBuffer] |
6849 | pathoswith | 1325 | mov ecx, edx |
1326 | cmp eax, [esi+INODE.fileSize] |
||
1327 | sbb ecx, [esi+INODE.fileSizeHigh] |
||
6462 | pathoswith | 1328 | jnc .ret |
6849 | pathoswith | 1329 | mov [esi+INODE.fileSize], eax |
1330 | mov [esi+INODE.fileSizeHigh], edx |
||
1331 | sub eax, 1 |
||
1332 | sbb edx, 0 |
||
1333 | jc @f |
||
1334 | div [ebp+EXTFS.bytesPerBlock] |
||
1335 | @@: |
||
1336 | inc eax |
||
1337 | mov edx, eax |
||
6643 | pathoswith | 1338 | cmp edx, 12 |
1339 | jc .directBlocks |
||
1340 | sub edx, 12 |
||
1341 | cmp edx, [ebp+EXTFS.dwordsPerBlock] |
||
1342 | jc .indirectBlocks |
||
1343 | sub edx, [ebp+EXTFS.dwordsPerBlock] |
||
1344 | cmp edx, [ebp+EXTFS.dwordsPerBranch] |
||
1345 | jc .doublyIndirectBlock |
||
1346 | sub edx, [ebp+EXTFS.dwordsPerBranch] |
||
1347 | jmp .triplyIndirectBlock |
||
1348 | |||
1349 | .directBlocks: |
||
1350 | lea edi, [esi+INODE.blockNumbers+edx*4] |
||
1351 | neg edx |
||
1352 | add edx, 12 |
||
6856 | pathoswith | 1353 | call freeBlockList |
1354 | test ebx, ebx |
||
6643 | pathoswith | 1355 | jz .ret |
1356 | .indirectBlocks: |
||
1357 | lea edi, [esi+INODE.addressBlock] |
||
1358 | call freeIndirectBlock |
||
1359 | test eax, eax |
||
1360 | jz .ret |
||
1361 | .doublyIndirectBlock: |
||
1362 | lea edi, [esi+INODE.doubleAddress] |
||
1363 | call freeDoublyIndirectBlock |
||
1364 | test eax, eax |
||
1365 | jz .ret |
||
1366 | .triplyIndirectBlock: |
||
1367 | mov eax, [esi+INODE.tripleAddress] |
||
1368 | test eax, eax |
||
1369 | jz .ret |
||
1370 | push eax edx |
||
1371 | stdcall kernel_alloc, [ebp+EXTFS.bytesPerBlock] |
||
6575 | pathoswith | 1372 | mov ebx, eax |
6643 | pathoswith | 1373 | pop edx eax |
1374 | push ebx eax edx |
||
1375 | call extfsReadBlock |
||
1376 | jc .err |
||
1377 | mov eax, edx |
||
6462 | pathoswith | 1378 | xor edx, edx |
6643 | pathoswith | 1379 | div [ebp+EXTFS.dwordsPerBranch] |
1380 | mov ecx, [ebp+EXTFS.dwordsPerBlock] |
||
1381 | sub ecx, eax |
||
1382 | lea edi, [ebx+eax*4] |
||
1383 | @@: |
||
1384 | call freeDoublyIndirectBlock |
||
1385 | test eax, eax |
||
1386 | jz .end |
||
1387 | dec ecx |
||
1388 | jnz @b |
||
1389 | .end: |
||
1390 | pop edx eax |
||
6462 | pathoswith | 1391 | test edx, edx |
6575 | pathoswith | 1392 | jnz @f |
1393 | xor ecx, ecx |
||
6756 | pathoswith | 1394 | inc ecx |
1395 | call extfsExtentFree |
||
6643 | pathoswith | 1396 | mov [esi+INODE.tripleAddress], eax |
1397 | jmp .done |
||
1398 | |||
6575 | pathoswith | 1399 | @@: |
6643 | pathoswith | 1400 | mov ebx, [esp] |
1401 | call extfsWriteBlock |
||
1402 | jmp .done |
||
6462 | pathoswith | 1403 | |
6643 | pathoswith | 1404 | .err: |
1405 | pop eax eax |
||
6558 | pathoswith | 1406 | .done: |
6643 | pathoswith | 1407 | call kernel_free |
6462 | pathoswith | 1408 | .ret: |
1409 | ret |
||
1410 | |||
1411 | linkInode: |
||
1412 | ; in: |
||
1413 | ; eax = inode on which to link |
||
1414 | ; ebx = inode to link |
||
6471 | pathoswith | 1415 | ; esi -> name in UTF-8 |
6462 | pathoswith | 1416 | ; dl = file type |
1417 | push esi edi ebx ecx eax edx |
||
1418 | call strlen |
||
1419 | push esi ebx ecx |
||
6558 | pathoswith | 1420 | lea esi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 1421 | mov ebx, esi |
1422 | call readInode |
||
1423 | jc .error_inode_read |
||
6643 | pathoswith | 1424 | mov eax, [esi+INODE.fileSize] |
6852 | pathoswith | 1425 | xor edx, edx |
1426 | div [ebp+EXTFS.bytesPerBlock] |
||
6462 | pathoswith | 1427 | xor ecx, ecx |
6558 | pathoswith | 1428 | .searchBlock: |
1429 | push eax ; blocks total |
||
6462 | pathoswith | 1430 | push ecx ; current file block number |
6558 | pathoswith | 1431 | cmp eax, ecx |
1432 | jz .alloc_block |
||
6726 | pathoswith | 1433 | call extfsGetExtent |
6462 | pathoswith | 1434 | jc .error_get_inode_block |
6726 | pathoswith | 1435 | push eax |
6462 | pathoswith | 1436 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
1437 | call extfsReadBlock |
||
1438 | jc .error_block_read |
||
6558 | pathoswith | 1439 | mov ecx, [esp+12] |
6856 | pathoswith | 1440 | add ecx, 8 ; directory entry size |
6462 | pathoswith | 1441 | mov edi, [ebp+EXTFS.tempBlockBuffer] |
1442 | mov edx, edi |
||
1443 | add edx, [ebp+EXTFS.bytesPerBlock] |
||
1444 | .searchSpace: |
||
1445 | movzx eax, [edi+DIRENTRY.entryLength] |
||
1446 | test eax, eax |
||
1447 | jz .zeroLength |
||
1448 | cmp [edi+DIRENTRY.inodeNumber], 0 |
||
1449 | je .unusedEntry |
||
1450 | movzx ebx, [edi+DIRENTRY.nameLength] |
||
1451 | add ebx, 8+3 |
||
1452 | and ebx, -4 |
||
1453 | sub eax, ebx |
||
1454 | add edi, ebx |
||
1455 | cmp eax, ecx |
||
1456 | jb .nextEntry |
||
1457 | sub edi, ebx |
||
1458 | mov [edi+DIRENTRY.entryLength], bx |
||
1459 | add edi, ebx |
||
1460 | mov [edi+DIRENTRY.entryLength], ax |
||
1461 | jmp .found |
||
1462 | |||
1463 | .unusedEntry: |
||
1464 | cmp eax, ecx |
||
1465 | jge .found |
||
1466 | .nextEntry: |
||
1467 | add edi, eax |
||
1468 | cmp edi, edx |
||
1469 | jb .searchSpace |
||
6856 | pathoswith | 1470 | pop ecx |
1471 | @@: |
||
1472 | pop ecx eax |
||
6558 | pathoswith | 1473 | inc ecx |
1474 | jmp .searchBlock |
||
6462 | pathoswith | 1475 | |
1476 | .zeroLength: |
||
1477 | mov eax, edx |
||
1478 | sub eax, edi |
||
6856 | pathoswith | 1479 | mov [edi+DIRENTRY.entryLength], ax |
6462 | pathoswith | 1480 | cmp eax, ecx |
1481 | jge .found |
||
1482 | mov [edi+DIRENTRY.inodeNumber], 0 |
||
1483 | pop eax |
||
1484 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
1485 | call extfsWriteBlock |
||
6856 | pathoswith | 1486 | jmp @b |
1487 | |||
6726 | pathoswith | 1488 | .alloc_block: |
6849 | pathoswith | 1489 | mov eax, [esi+INODE.fileSize] |
1490 | add eax, [ebp+EXTFS.bytesPerBlock] |
||
1491 | xor edx, edx |
||
1492 | mov ecx, [esp+24] |
||
6726 | pathoswith | 1493 | call extfsExtendFile |
1494 | jc .error_get_inode_block |
||
1495 | mov eax, [esp+24] |
||
1496 | mov ebx, esi |
||
1497 | call writeInode |
||
1498 | jc .error_get_inode_block |
||
1499 | mov ecx, [esp] |
||
1500 | call extfsGetExtent |
||
6462 | pathoswith | 1501 | jc .error_get_inode_block |
6726 | pathoswith | 1502 | push eax |
6575 | pathoswith | 1503 | mov edi, [ebp+EXTFS.tempBlockBuffer] |
6462 | pathoswith | 1504 | mov eax, [ebp+EXTFS.bytesPerBlock] |
1505 | mov [edi+DIRENTRY.entryLength], ax |
||
1506 | .found: |
||
1507 | pop edx ecx ecx ecx ebx esi |
||
6575 | pathoswith | 1508 | mov [edi+DIRENTRY.inodeNumber], ebx |
1509 | mov word [edi+DIRENTRY.nameLength], cx |
||
6856 | pathoswith | 1510 | sub eax, 8 |
1511 | cmp ecx, eax |
||
1512 | adc ecx, 0 |
||
1513 | test [ebp+EXTFS.superblock.incompatibleFlags], 2 |
||
1514 | jz @f |
||
1515 | mov eax, [esp] |
||
6462 | pathoswith | 1516 | mov [edi+DIRENTRY.fileType], al |
6856 | pathoswith | 1517 | @@: |
6462 | pathoswith | 1518 | add edi, 8 |
1519 | rep movsb |
||
1520 | mov eax, edx |
||
1521 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
1522 | call extfsWriteBlock |
||
1523 | @@: |
||
1524 | pop edx ecx ecx ebx edi esi |
||
1525 | ret |
||
1526 | |||
1527 | .error_block_read: |
||
1528 | pop ebx |
||
1529 | .error_get_inode_block: |
||
1530 | pop ebx ebx |
||
1531 | .error_inode_read: |
||
6933 | pathoswith | 1532 | pop ebx ebx ebx |
6462 | pathoswith | 1533 | jmp @b |
1534 | |||
1535 | unlinkInode: |
||
6853 | pathoswith | 1536 | ; in: eax = directory inode number, esi = inode to unlink |
1537 | push edi |
||
6558 | pathoswith | 1538 | lea ebx, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 1539 | call readInode |
6853 | pathoswith | 1540 | jc .ret |
1541 | xor ecx, ecx |
||
6462 | pathoswith | 1542 | .loop: |
6853 | pathoswith | 1543 | push ecx |
6726 | pathoswith | 1544 | call extfsGetExtent |
6462 | pathoswith | 1545 | jc .fail_loop |
6726 | pathoswith | 1546 | mov edi, eax |
6462 | pathoswith | 1547 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
1548 | call extfsReadBlock |
||
1549 | jc .fail_loop |
||
1550 | .first_dir_entry: ; edi -> block |
||
6853 | pathoswith | 1551 | cmp [ebx+DIRENTRY.inodeNumber], esi |
6462 | pathoswith | 1552 | jne @f |
1553 | mov [ebx+DIRENTRY.inodeNumber], 0 |
||
1554 | mov word [ebx+DIRENTRY.nameLength], 0 ; fileType = 0 |
||
1555 | jmp .write_block |
||
1556 | |||
6853 | pathoswith | 1557 | .fail: |
1558 | pop edi |
||
1559 | movi eax, ERROR_FS_FAIL |
||
1560 | stc |
||
1561 | .fail_loop: |
||
1562 | pop edi |
||
1563 | jmp .ret |
||
1564 | |||
1565 | .next: |
||
1566 | pop ecx ecx |
||
1567 | inc ecx |
||
1568 | jmp .loop |
||
1569 | |||
6462 | pathoswith | 1570 | @@: |
1571 | mov edx, ebx |
||
1572 | add edx, [ebp+EXTFS.bytesPerBlock] |
||
1573 | push edx |
||
6853 | pathoswith | 1574 | @@: |
1575 | movzx ecx, [ebx+DIRENTRY.entryLength] |
||
1576 | jecxz .fail |
||
6462 | pathoswith | 1577 | mov edx, ebx |
1578 | add ebx, ecx |
||
6853 | pathoswith | 1579 | cmp ebx, [esp] |
1580 | jnc .next |
||
1581 | cmp [ebx+DIRENTRY.inodeNumber], esi |
||
1582 | jnz @b |
||
6462 | pathoswith | 1583 | mov cx, [ebx+DIRENTRY.entryLength] |
1584 | add [edx+DIRENTRY.entryLength], cx |
||
1585 | pop eax |
||
1586 | .write_block: |
||
1587 | pop eax |
||
1588 | mov eax, edi |
||
1589 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
||
1590 | call extfsWriteBlock |
||
6853 | pathoswith | 1591 | .ret: |
1592 | pop edi |
||
6462 | pathoswith | 1593 | ret |
1594 | |||
6522 | pathoswith | 1595 | findInode: |
6471 | pathoswith | 1596 | ; in: esi -> path string in UTF-8 |
6462 | pathoswith | 1597 | ; out: |
6471 | pathoswith | 1598 | ; edi -> file name in UTF-8 |
6522 | pathoswith | 1599 | ; esi = last inode number |
6558 | pathoswith | 1600 | ; [ebp+EXTFS.inodeBuffer] = last inode |
6522 | pathoswith | 1601 | ; ecx = parent inode number |
1602 | ; CF=1 -> file not found, edi=0 -> error |
||
6462 | pathoswith | 1603 | push esi |
1604 | lea esi, [ebp+EXTFS.rootInodeBuffer] |
||
6558 | pathoswith | 1605 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 1606 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
6522 | pathoswith | 1607 | mov edx, esi |
6462 | pathoswith | 1608 | rep movsb |
6522 | pathoswith | 1609 | pop esi |
6849 | pathoswith | 1610 | pushd ebx 0 ROOT_INODE |
6558 | pathoswith | 1611 | mov edi, esi |
6756 | pathoswith | 1612 | cmp [edx+INODE.fileSize], 0 |
6522 | pathoswith | 1613 | jz .not_found |
1614 | cmp byte [esi], 0 |
||
1615 | jnz .next_path_part |
||
6462 | pathoswith | 1616 | xor eax, eax |
6849 | pathoswith | 1617 | pop esi ecx ebx |
6468 | pathoswith | 1618 | ret |
6462 | pathoswith | 1619 | |
6522 | pathoswith | 1620 | @@: |
1621 | pop esi esi |
||
1622 | .error: |
||
6849 | pathoswith | 1623 | pop esi ecx ebx |
6522 | pathoswith | 1624 | xor edi, edi |
1625 | stc |
||
1626 | ret |
||
1627 | |||
6462 | pathoswith | 1628 | .next_path_part: |
6756 | pathoswith | 1629 | push [edx+INODE.fileSize] |
6462 | pathoswith | 1630 | xor ecx, ecx |
1631 | .folder_block_cycle: |
||
1632 | push ecx |
||
6726 | pathoswith | 1633 | call extfsGetExtent |
6522 | pathoswith | 1634 | jc @b |
6462 | pathoswith | 1635 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
1636 | call extfsReadBlock |
||
6522 | pathoswith | 1637 | jc @b |
6462 | pathoswith | 1638 | push esi edx |
1639 | mov edx, ebx |
||
1640 | add edx, [ebp+EXTFS.bytesPerBlock] |
||
1641 | .start_rec: |
||
1642 | cmp [ebx+DIRENTRY.inodeNumber], 0 |
||
1643 | jz .next_rec |
||
1644 | push esi |
||
1645 | movzx ecx, [ebx+DIRENTRY.nameLength] |
||
6471 | pathoswith | 1646 | lea edi, [ebx+DIRENTRY.name] |
1647 | repz cmpsb |
||
1648 | jz .test_find |
||
6462 | pathoswith | 1649 | @@: ; doesn't match |
1650 | pop esi |
||
1651 | .next_rec: |
||
6856 | pathoswith | 1652 | movzx ecx, [ebx+DIRENTRY.entryLength] |
1653 | jecxz .stop |
||
1654 | add ebx, ecx |
||
6462 | pathoswith | 1655 | cmp ebx, edx |
1656 | jb .start_rec |
||
6856 | pathoswith | 1657 | jmp .stop |
6462 | pathoswith | 1658 | |
1659 | .test_find: |
||
1660 | cmp byte [esi], 0 |
||
1661 | je @f |
||
1662 | cmp byte [esi], '/' |
||
1663 | jne @b |
||
1664 | inc esi |
||
1665 | @@: |
||
6856 | pathoswith | 1666 | pop edx |
1667 | .stop: |
||
1668 | pop edx edi ecx eax |
||
6462 | pathoswith | 1669 | ; ebx -> matched directory entry, esi -> name without parent, or not changed |
1670 | cmp edi, esi |
||
6522 | pathoswith | 1671 | jnz @f |
6756 | pathoswith | 1672 | sub eax, [ebp+EXTFS.bytesPerBlock] |
6462 | pathoswith | 1673 | jle .not_found |
1674 | push eax |
||
1675 | inc ecx |
||
1676 | jmp .folder_block_cycle |
||
1677 | |||
6522 | pathoswith | 1678 | @@: |
6462 | pathoswith | 1679 | pop eax |
6522 | pathoswith | 1680 | mov [esp], eax |
6462 | pathoswith | 1681 | mov eax, [ebx+DIRENTRY.inodeNumber] |
6558 | pathoswith | 1682 | lea ebx, [ebp+EXTFS.inodeBuffer] |
6522 | pathoswith | 1683 | push eax |
6462 | pathoswith | 1684 | call readInode |
6522 | pathoswith | 1685 | jc .error |
1686 | cmp byte [esi], 0 |
||
1687 | je .ret |
||
1688 | mov edx, ebx |
||
1689 | movzx eax, [ebx+INODE.accessMode] |
||
1690 | and eax, TYPE_MASK |
||
1691 | cmp eax, DIRECTORY |
||
1692 | jz .next_path_part |
||
6558 | pathoswith | 1693 | xor edi, edi ; path folder is a file |
1694 | jmp @f |
||
1695 | |||
6462 | pathoswith | 1696 | .not_found: |
6558 | pathoswith | 1697 | mov esi, edi |
1698 | call strlen |
||
1699 | mov al, '/' |
||
1700 | repnz scasb |
||
1701 | mov edi, esi |
||
1702 | jnz @f |
||
1703 | xor edi, edi ; path folder not found |
||
1704 | @@: |
||
6462 | pathoswith | 1705 | movi eax, ERROR_FILE_NOT_FOUND |
1706 | stc |
||
6522 | pathoswith | 1707 | .ret: |
6849 | pathoswith | 1708 | pop esi ecx ebx |
6468 | pathoswith | 1709 | ret |
6462 | pathoswith | 1710 | |
1711 | writeSuperblock: |
||
1712 | push ebx |
||
1713 | mov eax, 2 |
||
1714 | lea ebx, [ebp+EXTFS.superblock] |
||
1715 | call fs_write32_sys |
||
1716 | pop ebx |
||
1717 | ret |
||
1718 | |||
1719 | extfsWritingInit: |
||
1720 | movi eax, ERROR_UNSUPPORTED_FS |
||
1721 | test [ebp+EXTFS.mountType], READ_ONLY |
||
1722 | jnz @f |
||
1723 | ext_lock: |
||
1724 | lea ecx, [ebp+EXTFS.Lock] |
||
1725 | jmp mutex_lock |
||
1726 | |||
1727 | @@: |
||
1728 | pop ebx |
||
1729 | xor ebx, ebx |
||
1730 | ret |
||
1731 | |||
1732 | ext_unlock: |
||
1733 | lea ecx, [ebp+EXTFS.Lock] |
||
1734 | jmp mutex_unlock |
||
1735 | |||
1736 | ;---------------------------------------------------------------- |
||
1737 | ext_ReadFolder: |
||
1738 | call ext_lock |
||
1739 | cmp byte [esi], 0 |
||
1740 | jz .root_folder |
||
6468 | pathoswith | 1741 | call findInode |
6462 | pathoswith | 1742 | jc .error_ret |
6558 | pathoswith | 1743 | lea esi, [ebp+EXTFS.inodeBuffer] |
6522 | pathoswith | 1744 | test [esi+INODE.accessMode], FLAG_FILE |
1745 | jnz .error_not_found |
||
6462 | pathoswith | 1746 | jmp @f |
1747 | |||
1748 | .root_folder: |
||
1749 | lea esi, [ebp+EXTFS.rootInodeBuffer] |
||
6558 | pathoswith | 1750 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 1751 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
1752 | shr ecx, 2 |
||
1753 | push edi |
||
1754 | rep movsd |
||
1755 | pop esi |
||
1756 | @@: |
||
1757 | cmp [esi+INODE.fileSize], 0 |
||
1758 | je .error_empty_dir |
||
1759 | mov edx, [ebx+16] |
||
1760 | push edx ; [edi+28] result buffer |
||
1761 | push 0 ; [edi+24] end of the current block in folder |
||
1762 | pushd [ebx+12] ; [edi+20] files to read |
||
1763 | pushd [ebx+4] ; [edi+16] first wanted file |
||
1764 | pushd [ebx+8] ; [edi+12] flags |
||
1765 | push 0 ; [edi+8] read files |
||
1766 | push 0 ; [edi+4] files in folder |
||
1767 | push 0 ; [edi] current block index |
||
1768 | mov edi, esp ; edi -> local variables |
||
1769 | add edx, 32 |
||
1770 | xor ecx, ecx |
||
6726 | pathoswith | 1771 | call extfsGetExtent |
6462 | pathoswith | 1772 | jc .error_get_block |
1773 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
1774 | call extfsReadBlock |
||
1775 | jc .error_get_block |
||
1776 | mov eax, ebx |
||
1777 | add eax, [ebp+EXTFS.bytesPerBlock] |
||
1778 | mov [edi+24], eax |
||
1779 | mov ecx, [edi+16] |
||
1780 | .find_wanted_start: |
||
1781 | jecxz .find_wanted_end |
||
1782 | .find_wanted_cycle: |
||
1783 | cmp [ebx+DIRENTRY.inodeNumber], 0 |
||
1784 | jz @f |
||
1785 | inc dword [edi+4] |
||
1786 | dec ecx |
||
1787 | @@: |
||
1788 | movzx eax, [ebx+DIRENTRY.entryLength] |
||
1789 | cmp eax, 12 ; minimum entry length |
||
1790 | jb .error_bad_len |
||
1791 | test eax, 3 ; length must be aligned |
||
1792 | jnz .error_bad_len |
||
1793 | sub [esi+INODE.fileSize], eax |
||
1794 | add ebx, eax |
||
1795 | cmp ebx, [edi+24] |
||
1796 | jb .find_wanted_start |
||
1797 | push .find_wanted_start |
||
1798 | .end_block: ; read next block |
||
1799 | cmp [esi+INODE.fileSize], 0 |
||
1800 | jle .end_dir |
||
1801 | inc dword [edi] |
||
1802 | push ecx |
||
1803 | mov ecx, [edi] |
||
6726 | pathoswith | 1804 | call extfsGetExtent |
6462 | pathoswith | 1805 | jc .error_get_block |
1806 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
1807 | call extfsReadBlock |
||
1808 | jc .error_get_block |
||
1809 | pop ecx |
||
1810 | mov eax, ebx |
||
1811 | add eax, [ebp+EXTFS.bytesPerBlock] |
||
1812 | mov [edi+24], eax |
||
1813 | ret |
||
1814 | |||
1815 | .wanted_end: |
||
1816 | loop .find_wanted_cycle |
||
1817 | .find_wanted_end: |
||
1818 | mov ecx, [edi+20] |
||
1819 | .wanted_start: |
||
1820 | jecxz .wanted_end |
||
1821 | cmp [ebx+DIRENTRY.inodeNumber], 0 |
||
1822 | jz .empty_rec |
||
1823 | inc dword [edi+8] |
||
1824 | inc dword [edi+4] |
||
6558 | pathoswith | 1825 | push ebx edi ecx esi edx edi |
6471 | pathoswith | 1826 | pushd [edi+12] |
6462 | pathoswith | 1827 | mov edi, edx |
1828 | xor eax, eax |
||
1829 | mov ecx, 40 / 4 |
||
1830 | rep stosd |
||
6558 | pathoswith | 1831 | popd [edx+4] edi |
6462 | pathoswith | 1832 | mov eax, [ebx+DIRENTRY.inodeNumber] |
6558 | pathoswith | 1833 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
6462 | pathoswith | 1834 | call readInode |
1835 | jc .error_read_subinode |
||
1836 | mov esi, ebx |
||
1837 | lea edi, [edx+8] |
||
1838 | mov eax, [ebx+INODE.inodeModified] |
||
1839 | sub eax, 978307200 ; 01.01.1970-01.01.2001 = (365*31+8)*24*60*60 |
||
1840 | call fsTime2bdfe |
||
1841 | |||
1842 | mov eax, [esi+INODE.accessedTime] |
||
1843 | sub eax, 978307200 |
||
1844 | call fsTime2bdfe |
||
1845 | |||
1846 | mov eax, [esi+INODE.dataModified] |
||
1847 | sub eax, 978307200 |
||
1848 | call fsTime2bdfe |
||
1849 | pop edx |
||
1850 | or dword [edx], KOS_DIRECTORY |
||
6522 | pathoswith | 1851 | test [esi+INODE.accessMode], FLAG_FILE |
1852 | jz @f |
||
6462 | pathoswith | 1853 | xor dword [edx], KOS_DIRECTORY ; mark as file |
1854 | mov eax, [esi+INODE.fileSize] |
||
1855 | stosd |
||
1856 | mov eax, [esi+INODE.fileSizeHigh] |
||
1857 | stosd |
||
1858 | @@: |
||
1859 | mov esi, [esp+12] |
||
1860 | movzx ecx, [esi+DIRENTRY.nameLength] |
||
6471 | pathoswith | 1861 | lea esi, [esi+DIRENTRY.name] |
1862 | cmp byte [esi], '.' |
||
1863 | jnz @f |
||
1864 | or byte [edx], KOS_HIDDEN |
||
1865 | @@: |
||
6462 | pathoswith | 1866 | lea edi, [edx+40] |
6798 | pathoswith | 1867 | cmp byte [edx+4], 3 |
1868 | jz .utf8 |
||
1869 | add ecx, esi |
||
1870 | cmp byte [edx+4], 2 |
||
6471 | pathoswith | 1871 | jz .utf16 |
1872 | @@: |
||
1873 | call utf8to16 |
||
1874 | call uni2ansi_char |
||
1875 | stosb |
||
1876 | cmp esi, ecx |
||
1877 | jc @b |
||
6462 | pathoswith | 1878 | and byte [edi], 0 |
6471 | pathoswith | 1879 | add edx, 40+264 |
1880 | @@: |
||
6462 | pathoswith | 1881 | pop esi ecx edi ebx |
1882 | dec ecx |
||
1883 | .empty_rec: |
||
1884 | movzx eax, [ebx+DIRENTRY.entryLength] |
||
1885 | cmp eax, 12 |
||
1886 | jb .error_bad_len |
||
1887 | test eax, 3 |
||
1888 | jnz .error_bad_len |
||
1889 | sub [esi+INODE.fileSize], eax |
||
1890 | add ebx, eax |
||
1891 | cmp ebx, [edi+24] |
||
1892 | jb .wanted_start |
||
1893 | push .wanted_start |
||
1894 | jmp .end_block |
||
1895 | |||
6798 | pathoswith | 1896 | .utf8: |
1897 | rep movsb |
||
1898 | mov byte [edi], 0 |
||
1899 | add edx, 40+520 |
||
1900 | jmp @b |
||
1901 | |||
6471 | pathoswith | 1902 | .utf16: |
1903 | call utf8to16 |
||
1904 | stosw |
||
1905 | cmp esi, ecx |
||
1906 | jc .utf16 |
||
1907 | and word [edi], 0 |
||
1908 | add edx, 40+520 |
||
1909 | jmp @b |
||
1910 | |||
6462 | pathoswith | 1911 | .end_dir: |
1912 | call ext_unlock |
||
1913 | mov edx, [edi+28] |
||
1914 | mov ebx, [edi+8] |
||
1915 | mov ecx, [edi+4] |
||
1916 | mov dword [edx], 1 ; version |
||
1917 | mov [edx+4], ebx |
||
1918 | mov [edx+8], ecx |
||
1919 | lea esp, [edi+32] |
||
1920 | mov ecx, 20/4 |
||
1921 | lea edi, [edx+12] |
||
1922 | xor eax, eax |
||
1923 | rep stosd |
||
1924 | ret |
||
1925 | |||
1926 | .error_bad_len: |
||
1927 | movi eax, ERROR_FS_FAIL |
||
1928 | .error_read_subinode: |
||
1929 | .error_get_block: |
||
1930 | lea esp, [edi+32] |
||
1931 | .error_ret: |
||
6880 | pathoswith | 1932 | xor ebx, ebx |
6462 | pathoswith | 1933 | push eax |
1934 | call ext_unlock |
||
1935 | pop eax |
||
1936 | ret |
||
1937 | |||
1938 | .error_empty_dir: |
||
1939 | movi eax, ERROR_FS_FAIL |
||
1940 | jmp .error_ret |
||
1941 | |||
1942 | .error_not_found: |
||
1943 | movi eax, ERROR_FILE_NOT_FOUND |
||
1944 | jmp .error_ret |
||
1945 | |||
1946 | ;---------------------------------------------------------------- |
||
1947 | ext_ReadFile: |
||
1948 | call ext_lock |
||
6468 | pathoswith | 1949 | call findInode |
6849 | pathoswith | 1950 | pushd 0 eax |
6726 | pathoswith | 1951 | jc .ret |
6558 | pathoswith | 1952 | lea esi, [ebp+EXTFS.inodeBuffer] |
6726 | pathoswith | 1953 | mov byte [esp], ERROR_ACCESS_DENIED |
1954 | test [esi+INODE.accessMode], FLAG_FILE |
||
1955 | jz .ret ; not a file |
||
1956 | mov byte [esp], ERROR_END_OF_FILE |
||
1957 | mov eax, [esi+INODE.fileSize] |
||
1958 | mov edx, [esi+INODE.fileSizeHigh] |
||
1959 | sub eax, [ebx+4] |
||
1960 | sbb edx, [ebx+8] |
||
1961 | jc .ret |
||
6462 | pathoswith | 1962 | mov ecx, [ebx+12] |
6726 | pathoswith | 1963 | sub eax, ecx |
1964 | sbb edx, 0 |
||
1965 | jc @f |
||
1966 | xor eax, eax |
||
1967 | mov [esp], eax |
||
1968 | @@: |
||
1969 | add ecx, eax |
||
6462 | pathoswith | 1970 | mov eax, [ebx+4] |
1971 | mov edx, [ebx+8] |
||
6726 | pathoswith | 1972 | mov edi, [ebx+16] |
6462 | pathoswith | 1973 | div [ebp+EXTFS.bytesPerBlock] |
6726 | pathoswith | 1974 | test edx, edx |
1975 | jz .aligned |
||
1976 | .piece: |
||
1977 | push eax ecx |
||
1978 | mov esi, edx |
||
6462 | pathoswith | 1979 | mov ecx, eax |
6726 | pathoswith | 1980 | call extfsGetExtent |
1981 | jc .errorGet |
||
1982 | mov ecx, [ebp+EXTFS.sectorsPerBlock] |
||
1983 | mul ecx |
||
6462 | pathoswith | 1984 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
6726 | pathoswith | 1985 | call fs_read64_sys |
1986 | test eax, eax |
||
1987 | jnz .errorRead |
||
1988 | pop eax |
||
1989 | mov ecx, [ebp+EXTFS.bytesPerBlock] |
||
1990 | sub ecx, esi |
||
1991 | sub eax, ecx |
||
1992 | jnc @f |
||
1993 | add ecx, eax |
||
1994 | xor eax, eax |
||
1995 | @@: |
||
1996 | add esi, ebx |
||
1997 | add [esp+8], ecx |
||
6462 | pathoswith | 1998 | rep movsb |
6726 | pathoswith | 1999 | mov ecx, eax |
2000 | pop eax |
||
2001 | inc eax |
||
6462 | pathoswith | 2002 | xor edx, edx |
6726 | pathoswith | 2003 | jecxz .ret |
2004 | .aligned: |
||
2005 | xchg eax, ecx |
||
6462 | pathoswith | 2006 | div [ebp+EXTFS.bytesPerBlock] |
6726 | pathoswith | 2007 | push edx |
2008 | mov edx, eax |
||
2009 | .writeExtent: |
||
2010 | test edx, edx |
||
2011 | jz .end |
||
2012 | push ecx |
||
2013 | call extfsGetExtent |
||
2014 | jc .errorGet |
||
2015 | sub edx, ecx |
||
2016 | jnc @f |
||
2017 | add ecx, edx |
||
2018 | xor edx, edx |
||
6462 | pathoswith | 2019 | @@: |
6726 | pathoswith | 2020 | add [esp], ecx |
2021 | imul ecx, [ebp+EXTFS.sectorsPerBlock] |
||
2022 | mov ebx, edi |
||
2023 | push edx ecx |
||
2024 | mul [ebp+EXTFS.sectorsPerBlock] |
||
2025 | call fs_read64_sys |
||
2026 | pop ecx edx |
||
2027 | test eax, eax |
||
2028 | jnz .errorRead |
||
2029 | shl ecx, 9 |
||
2030 | add edi, ecx |
||
2031 | add [esp+12], ecx |
||
2032 | pop ecx |
||
2033 | jmp .writeExtent |
||
6462 | pathoswith | 2034 | |
6726 | pathoswith | 2035 | .end: |
6462 | pathoswith | 2036 | mov eax, ecx |
6726 | pathoswith | 2037 | pop ecx |
2038 | jecxz .ret |
||
2039 | jmp .piece |
||
6462 | pathoswith | 2040 | |
6726 | pathoswith | 2041 | .errorRead: |
2042 | movi eax, ERROR_DEVICE |
||
2043 | .errorGet: |
||
6462 | pathoswith | 2044 | pop ebx ebx |
6726 | pathoswith | 2045 | mov [esp], eax |
2046 | .ret: |
||
6462 | pathoswith | 2047 | call ext_unlock |
6726 | pathoswith | 2048 | pop eax ebx |
6462 | pathoswith | 2049 | ret |
2050 | |||
2051 | ;---------------------------------------------------------------- |
||
2052 | ext_GetFileInfo: |
||
6871 | pathoswith | 2053 | cmp byte [esi], 0 |
2054 | jz .volume |
||
6462 | pathoswith | 2055 | call ext_lock |
6468 | pathoswith | 2056 | call findInode |
6871 | pathoswith | 2057 | jc .ret |
6558 | pathoswith | 2058 | lea esi, [ebp+EXTFS.inodeBuffer] |
6849 | pathoswith | 2059 | mov edx, [ebx+16] |
6522 | pathoswith | 2060 | mov bl, [edi] |
6462 | pathoswith | 2061 | xor eax, eax |
2062 | mov edi, edx |
||
2063 | mov ecx, 40/4 |
||
2064 | rep stosd |
||
2065 | cmp bl, '.' |
||
2066 | jne @f |
||
2067 | or dword [edx], KOS_HIDDEN |
||
2068 | @@: |
||
2069 | or dword [edx], KOS_DIRECTORY |
||
6522 | pathoswith | 2070 | test [esi+INODE.accessMode], FLAG_FILE |
2071 | jz @f |
||
6462 | pathoswith | 2072 | xor dword [edx], KOS_DIRECTORY ; mark as file |
2073 | mov eax, [esi+INODE.fileSize] |
||
2074 | mov ebx, [esi+INODE.fileSizeHigh] |
||
2075 | mov dword [edx+32], eax |
||
2076 | mov dword [edx+36], ebx |
||
2077 | @@: |
||
2078 | lea edi, [edx+8] |
||
2079 | mov eax, [esi+INODE.inodeModified] |
||
2080 | sub eax, 978307200 ; 01.01.1970-01.01.2001 = (365*31+8)*24*60*60 |
||
2081 | call fsTime2bdfe |
||
2082 | |||
2083 | mov eax, [esi+INODE.accessedTime] |
||
2084 | sub eax, 978307200 |
||
2085 | call fsTime2bdfe |
||
2086 | |||
2087 | mov eax, [esi+INODE.dataModified] |
||
2088 | sub eax, 978307200 |
||
2089 | call fsTime2bdfe |
||
6871 | pathoswith | 2090 | xor eax, eax |
2091 | .ret: |
||
2092 | push eax |
||
6462 | pathoswith | 2093 | call ext_unlock |
6871 | pathoswith | 2094 | pop eax |
6876 | pathoswith | 2095 | @@: |
6871 | pathoswith | 2096 | ret |
2097 | |||
2098 | .volume: |
||
2099 | mov eax, dword[ebp+EXTFS.Length] |
||
2100 | mov edx, dword[ebp+EXTFS.Length+4] |
||
2101 | mov edi, [ebx+16] |
||
2102 | shld edx, eax, 9 |
||
2103 | shl eax, 9 |
||
2104 | mov [edi+36], edx |
||
2105 | mov [edi+32], eax |
||
2106 | mov eax, [ebx+8] |
||
2107 | mov byte [edi], 8 |
||
2108 | mov [edi+4], eax |
||
6876 | pathoswith | 2109 | test eax, eax |
2110 | jz @b |
||
6871 | pathoswith | 2111 | lea esi, [ebp+EXTFS.superblock.volumeLabel] |
2112 | mov ecx, 16 |
||
2113 | add edi, 40 |
||
2114 | cmp eax, 3 |
||
2115 | jz .utf8 |
||
2116 | add ecx, esi |
||
2117 | cmp eax, 2 |
||
2118 | jz .utf16 |
||
2119 | @@: |
||
2120 | call utf8to16 |
||
2121 | call uni2ansi_char |
||
2122 | stosb |
||
2123 | cmp esi, ecx |
||
2124 | jc @b |
||
2125 | jmp @f |
||
2126 | |||
2127 | .utf8: |
||
2128 | rep movsb |
||
2129 | jmp @f |
||
2130 | |||
2131 | .utf16: |
||
2132 | call utf8to16 |
||
2133 | stosw |
||
2134 | cmp esi, ecx |
||
2135 | jc .utf16 |
||
2136 | @@: |
||
6462 | pathoswith | 2137 | xor eax, eax |
6871 | pathoswith | 2138 | mov [edi], ax |
6462 | pathoswith | 2139 | ret |
2140 | |||
2141 | ;---------------------------------------------------------------- |
||
2142 | ext_SetFileInfo: |
||
2143 | call extfsWritingInit |
||
6468 | pathoswith | 2144 | call findInode |
6462 | pathoswith | 2145 | jc @f |
6849 | pathoswith | 2146 | push esi |
2147 | mov esi, [ebx+16] |
||
2148 | add esi, 16 |
||
6558 | pathoswith | 2149 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 2150 | call fsCalculateTime |
2151 | add eax, 978307200 ; 01.01.1970-01.01.2001 = (365*31+8)*24*60*60 |
||
2152 | mov [edi+INODE.accessedTime], eax |
||
2153 | |||
2154 | add esi, 8 |
||
2155 | call fsCalculateTime |
||
2156 | add eax, 978307200 |
||
2157 | mov [edi+INODE.dataModified], eax |
||
2158 | mov ebx, edi |
||
2159 | pop eax |
||
2160 | call writeInode |
||
2161 | @@: |
||
2162 | push eax |
||
2163 | jc @f |
||
2164 | call writeSuperblock |
||
2165 | mov esi, [ebp+PARTITION.Disk] |
||
2166 | call disk_sync |
||
2167 | @@: |
||
2168 | call ext_unlock |
||
2169 | pop eax |
||
2170 | ret |
||
2171 | |||
2172 | ;---------------------------------------------------------------- |
||
2173 | ext_Delete: |
||
2174 | call extfsWritingInit |
||
6468 | pathoswith | 2175 | call findInode |
6853 | pathoswith | 2176 | jc .error |
2177 | push ecx |
||
2178 | movzx edi, [ebp+EXTFS.inodeBuffer.accessMode] |
||
2179 | and edi, TYPE_MASK |
||
2180 | cmp edi, DIRECTORY |
||
6462 | pathoswith | 2181 | jne .file |
6726 | pathoswith | 2182 | xor ecx, ecx |
6462 | pathoswith | 2183 | .checkDirectory: |
6726 | pathoswith | 2184 | push ecx |
2185 | call extfsGetExtent |
||
2186 | jc .empty |
||
6462 | pathoswith | 2187 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
2188 | call extfsReadBlock |
||
6853 | pathoswith | 2189 | jc .error8 |
6462 | pathoswith | 2190 | mov edx, ebx |
2191 | add edx, [ebp+EXTFS.bytesPerBlock] |
||
2192 | .dir_entry: |
||
6853 | pathoswith | 2193 | movzx ecx, [ebx+DIRENTRY.nameLength] |
2194 | mov ax, word [ebx+DIRENTRY.name] |
||
2195 | jecxz @f |
||
2196 | cmp al, '.' |
||
2197 | jnz .not_empty |
||
2198 | dec ecx |
||
2199 | jz @f |
||
2200 | cmp al, ah |
||
2201 | jnz .not_empty |
||
2202 | dec ecx |
||
2203 | jnz .not_empty |
||
6462 | pathoswith | 2204 | @@: |
6853 | pathoswith | 2205 | mov cx, [ebx+DIRENTRY.entryLength] |
2206 | jecxz @f |
||
6462 | pathoswith | 2207 | add ebx, ecx |
2208 | cmp ebx, edx |
||
2209 | jb .dir_entry |
||
6853 | pathoswith | 2210 | @@: |
6726 | pathoswith | 2211 | pop ecx |
2212 | inc ecx |
||
6462 | pathoswith | 2213 | jmp .checkDirectory |
2214 | |||
6756 | pathoswith | 2215 | .not_empty: |
2216 | pop eax eax |
||
2217 | push ERROR_ACCESS_DENIED |
||
2218 | jmp .ret |
||
2219 | |||
6853 | pathoswith | 2220 | .error8: |
2221 | pop ebx |
||
2222 | .error4: |
||
2223 | pop ebx |
||
2224 | .error: |
||
2225 | push eax |
||
2226 | jmp .ret |
||
2227 | |||
6462 | pathoswith | 2228 | .empty: |
6853 | pathoswith | 2229 | pop ecx ecx |
6726 | pathoswith | 2230 | cmp eax, ERROR_END_OF_FILE |
6853 | pathoswith | 2231 | jnz .error |
2232 | push ecx |
||
6462 | pathoswith | 2233 | .file: |
6522 | pathoswith | 2234 | mov eax, ecx |
6462 | pathoswith | 2235 | call unlinkInode |
6853 | pathoswith | 2236 | jc .error4 |
2237 | pop eax |
||
2238 | lea ebx, [ebp+EXTFS.inodeBuffer] |
||
2239 | cmp edi, DIRECTORY |
||
2240 | jnz @f |
||
2241 | dec [ebx+INODE.linksCount] |
||
2242 | call writeInode |
||
2243 | @@: |
||
2244 | mov eax, esi |
||
2245 | call readInode |
||
2246 | jc .error |
||
2247 | dec [ebx+INODE.linksCount] |
||
6462 | pathoswith | 2248 | jz @f |
6853 | pathoswith | 2249 | cmp edi, DIRECTORY |
2250 | jnz .hardlinks |
||
6462 | pathoswith | 2251 | @@: |
6853 | pathoswith | 2252 | push esi edi |
6849 | pathoswith | 2253 | xor eax, eax |
2254 | xor edx, edx |
||
6643 | pathoswith | 2255 | call extfsTruncateFile ; free file's data |
6778 | pathoswith | 2256 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
2257 | lea edi, [ebp+EXTFS.inodeBuffer] |
||
6462 | pathoswith | 2258 | xor eax, eax |
6849 | pathoswith | 2259 | push edi |
6462 | pathoswith | 2260 | rep stosb |
2261 | call fsGetTime |
||
6853 | pathoswith | 2262 | pop ebx edi esi |
6462 | pathoswith | 2263 | add eax, 978307200 |
6778 | pathoswith | 2264 | mov [ebx+INODE.deletedTime], eax |
6853 | pathoswith | 2265 | mov eax, esi |
6462 | pathoswith | 2266 | dec eax |
2267 | xor edx, edx |
||
2268 | div [ebp+EXTFS.superblock.inodesPerGroup] |
||
6848 | pathoswith | 2269 | push edx |
2270 | mov ebx, [ebp+EXTFS.descriptorTable] |
||
2271 | shl eax, 5 |
||
2272 | add ebx, eax |
||
6853 | pathoswith | 2273 | cmp edi, DIRECTORY |
6756 | pathoswith | 2274 | jnz @f |
2275 | dec [ebx+BGDESCR.directoriesCount] |
||
2276 | @@: |
||
2277 | inc [ebx+BGDESCR.inodesFree] |
||
6848 | pathoswith | 2278 | push [ebx+BGDESCR.inodeBitmap] |
2279 | call extfsWriteDescriptor |
||
6462 | pathoswith | 2280 | pop eax |
6756 | pathoswith | 2281 | mov ebx, [ebp+EXTFS.tempBlockBuffer] |
6848 | pathoswith | 2282 | mov ecx, eax |
6756 | pathoswith | 2283 | call extfsReadBlock |
6853 | pathoswith | 2284 | pop edx |
2285 | jc .error |
||
2286 | mov eax, edx |
||
6756 | pathoswith | 2287 | and edx, 31 |
2288 | shr eax, 5 |
||
2289 | shl eax, 2 |
||
2290 | add eax, ebx |
||
2291 | btr [eax], edx |
||
2292 | mov eax, ecx |
||
2293 | call extfsWriteBlock |
||
2294 | inc [ebp+EXTFS.superblock.inodesFree] |
||
6853 | pathoswith | 2295 | .hardlinks: |
2296 | mov eax, esi |
||
2297 | lea ebx, [ebp+EXTFS.inodeBuffer] |
||
2298 | call writeInode |
||
6462 | pathoswith | 2299 | push eax |
2300 | call writeSuperblock |
||
2301 | mov esi, [ebp+PARTITION.Disk] |
||
2302 | call disk_sync |
||
2303 | .ret: |
||
2304 | call ext_unlock |
||
2305 | xor ebx, ebx |
||
2306 | pop eax |
||
2307 | ret |
||
2308 | |||
2309 | ;---------------------------------------------------------------- |
||
2310 | ext_CreateFolder: |
||
2311 | call extfsWritingInit |
||
6468 | pathoswith | 2312 | call findInode |
6462 | pathoswith | 2313 | jnc .success ; exist |
6522 | pathoswith | 2314 | test edi, edi |
2315 | jz .error |
||
6462 | pathoswith | 2316 | mov eax, esi |
6643 | pathoswith | 2317 | call extfsInodeAlloc |
6462 | pathoswith | 2318 | jc .error |
2319 | push ebx esi edi |
||
6558 | pathoswith | 2320 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 2321 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
6852 | pathoswith | 2322 | xor eax, eax |
6462 | pathoswith | 2323 | rep stosb |
2324 | call fsGetTime |
||
2325 | add eax, 978307200 |
||
6852 | pathoswith | 2326 | lea ebx, [ebp+EXTFS.inodeBuffer] |
2327 | mov [ebx+INODE.accessedTime], eax |
||
2328 | mov [ebx+INODE.dataModified], eax |
||
6462 | pathoswith | 2329 | pop edi esi edx |
2330 | ; edx = allocated inode number, edi -> filename, esi = parent inode number |
||
6861 | pathoswith | 2331 | mov [ebx+INODE.accessMode], DIRECTORY or 511 |
6933 | pathoswith | 2332 | mov byte [ebx+INODE.linksCount], 2 |
6462 | pathoswith | 2333 | mov eax, edx |
2334 | call writeInode |
||
2335 | jc .error |
||
2336 | ; link to self |
||
2337 | push edx esi |
||
2338 | mov eax, edx |
||
2339 | mov ebx, eax |
||
2340 | mov dl, DIR_DIRECTORY |
||
2341 | mov esi, self_link |
||
2342 | call linkInode |
||
2343 | pop esi edx |
||
2344 | jc .error |
||
2345 | ; link to parent |
||
2346 | push edx esi |
||
2347 | mov eax, ebx |
||
2348 | mov ebx, esi |
||
2349 | mov dl, DIR_DIRECTORY |
||
2350 | mov esi, parent_link |
||
2351 | call linkInode |
||
2352 | pop esi edx |
||
2353 | jc .error |
||
2354 | ; link parent to child |
||
6933 | pathoswith | 2355 | push esi |
6462 | pathoswith | 2356 | mov eax, esi |
2357 | mov ebx, edx |
||
2358 | mov esi, edi |
||
2359 | mov dl, DIR_DIRECTORY |
||
2360 | call linkInode |
||
6933 | pathoswith | 2361 | pop edx |
6462 | pathoswith | 2362 | jc .error |
6933 | pathoswith | 2363 | push ebx |
2364 | lea ebx, [ebp+EXTFS.inodeBuffer] |
||
2365 | inc [ebx+INODE.linksCount] |
||
2366 | mov eax, edx |
||
2367 | call writeInode |
||
2368 | pop ebx |
||
2369 | jc .error |
||
6462 | pathoswith | 2370 | mov eax, ebx |
2371 | dec eax |
||
2372 | xor edx, edx |
||
2373 | div [ebp+EXTFS.superblock.inodesPerGroup] |
||
6848 | pathoswith | 2374 | mov ebx, [ebp+EXTFS.descriptorTable] |
2375 | shl eax, 5 |
||
2376 | add ebx, eax |
||
6756 | pathoswith | 2377 | inc [ebx+BGDESCR.directoriesCount] |
6462 | pathoswith | 2378 | call extfsWriteDescriptor |
2379 | .success: |
||
2380 | .error: |
||
2381 | push eax |
||
2382 | call writeSuperblock |
||
2383 | mov esi, [ebp+PARTITION.Disk] |
||
2384 | call disk_sync |
||
2385 | call ext_unlock |
||
2386 | pop eax |
||
2387 | ret |
||
2388 | |||
2389 | self_link db ".", 0 |
||
2390 | parent_link db "..", 0 |
||
2391 | |||
2392 | ;---------------------------------------------------------------- |
||
2393 | ext_CreateFile: |
||
2394 | call extfsWritingInit |
||
6726 | pathoswith | 2395 | pushd 0 0 ebx |
6468 | pathoswith | 2396 | call findInode |
6522 | pathoswith | 2397 | jnc .exist |
2398 | test edi, edi |
||
2399 | jz .error |
||
6462 | pathoswith | 2400 | mov eax, esi |
6643 | pathoswith | 2401 | call extfsInodeAlloc |
6462 | pathoswith | 2402 | jc .error |
6522 | pathoswith | 2403 | push ebx ebx esi edi |
6558 | pathoswith | 2404 | lea edi, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 2405 | movzx ecx, [ebp+EXTFS.superblock.inodeSize] |
6852 | pathoswith | 2406 | xor eax, eax |
6462 | pathoswith | 2407 | rep stosb |
2408 | call fsGetTime |
||
2409 | add eax, 978307200 |
||
6852 | pathoswith | 2410 | lea ebx, [ebp+EXTFS.inodeBuffer] |
2411 | mov [ebx+INODE.accessedTime], eax |
||
2412 | mov [ebx+INODE.dataModified], eax |
||
6462 | pathoswith | 2413 | pop edi esi edx |
2414 | ; edx = allocated inode number, edi -> filename, esi = parent inode number |
||
6861 | pathoswith | 2415 | mov [ebx+INODE.accessMode], FLAG_FILE or 110110110b |
6933 | pathoswith | 2416 | mov byte [ebx+INODE.linksCount], 1 |
6462 | pathoswith | 2417 | mov eax, edx |
2418 | call writeInode |
||
6522 | pathoswith | 2419 | jc .error2 |
6462 | pathoswith | 2420 | ; link parent to child |
2421 | mov eax, esi |
||
2422 | mov ebx, edx |
||
2423 | mov esi, edi |
||
2424 | mov dl, DIR_FLAG_FILE |
||
2425 | call linkInode |
||
6522 | pathoswith | 2426 | jc .error2 |
6933 | pathoswith | 2427 | mov eax, ebx |
2428 | lea ebx, [ebp+EXTFS.inodeBuffer] |
||
2429 | call readInode |
||
2430 | jc .error2 |
||
6462 | pathoswith | 2431 | pop esi ebx |
6849 | pathoswith | 2432 | mov eax, [ebx+12] |
2433 | xor edx, edx |
||
6522 | pathoswith | 2434 | jmp ext_WriteFile.start |
6462 | pathoswith | 2435 | |
6522 | pathoswith | 2436 | .exist: |
2437 | movi eax, ERROR_ACCESS_DENIED |
||
6726 | pathoswith | 2438 | test [ebp+EXTFS.inodeBuffer.accessMode], FLAG_FILE |
6522 | pathoswith | 2439 | jz .error ; not a file |
2440 | pop ebx |
||
6849 | pathoswith | 2441 | mov eax, [ebx+12] |
2442 | xor edx, edx |
||
2443 | push eax edx ebx esi |
||
6522 | pathoswith | 2444 | call extfsTruncateFile |
6849 | pathoswith | 2445 | pop esi ebx edx eax |
6643 | pathoswith | 2446 | jmp ext_WriteFile.start |
2447 | |||
6522 | pathoswith | 2448 | .error2: |
2449 | pop ebx |
||
6462 | pathoswith | 2450 | .error: |
2451 | push eax |
||
2452 | call ext_unlock |
||
6726 | pathoswith | 2453 | pop eax ebx ebx ebx |
6462 | pathoswith | 2454 | ret |
2455 | |||
2456 | ;---------------------------------------------------------------- |
||
2457 | ext_WriteFile: |
||
2458 | call extfsWritingInit |
||
6468 | pathoswith | 2459 | call findInode |
6726 | pathoswith | 2460 | pushd 0 eax |
2461 | jc .ret |
||
2462 | mov byte [esp], ERROR_ACCESS_DENIED |
||
2463 | test [ebp+EXTFS.inodeBuffer.accessMode], FLAG_FILE |
||
2464 | jz .ret ; not a file |
||
6849 | pathoswith | 2465 | mov byte [esp], 0 |
2466 | mov eax, [ebx+4] |
||
2467 | mov edx, [ebx+8] |
||
2468 | add eax, [ebx+12] |
||
2469 | adc edx, 0 |
||
6522 | pathoswith | 2470 | .start: |
6726 | pathoswith | 2471 | push esi |
6849 | pathoswith | 2472 | mov ecx, esi |
6462 | pathoswith | 2473 | call extfsExtendFile |
6726 | pathoswith | 2474 | jc .errorExtend |
2475 | mov eax, [ebx+4] |
||
6849 | pathoswith | 2476 | mov edx, [ebx+8] |
6643 | pathoswith | 2477 | mov ecx, [ebx+12] |
6726 | pathoswith | 2478 | mov esi, [ebx+16] |
2479 | .write: |
||
6861 | pathoswith | 2480 | jecxz .zero |
6462 | pathoswith | 2481 | div [ebp+EXTFS.bytesPerBlock] |
2482 | test edx, edx |
||
6726 | pathoswith | 2483 | jz .aligned |
2484 | .piece: |
||
2485 | mov ebx, ecx |
||
2486 | mov edi, edx |
||
2487 | mov ecx, eax |
||
2488 | push eax |
||
2489 | call extfsGetExtent |
||
2490 | jc .errorGet |
||
2491 | mov ecx, [ebp+EXTFS.sectorsPerBlock] |
||
2492 | mul ecx |
||
2493 | push ecx eax ebx |
||
2494 | mov ebx, [ebp+EXTFS.mainBlockBuffer] |
||
2495 | call fs_read64_sys |
||
2496 | test eax, eax |
||
2497 | jnz .errorDevice |
||
2498 | pop eax |
||
2499 | mov ecx, [ebp+EXTFS.bytesPerBlock] |
||
2500 | sub ecx, edi |
||
2501 | sub eax, ecx |
||
2502 | jnc @f |
||
2503 | add ecx, eax |
||
2504 | xor eax, eax |
||
6462 | pathoswith | 2505 | @@: |
6726 | pathoswith | 2506 | add edi, ebx |
2507 | add [esp+20], ecx |
||
2508 | rep movsb |
||
6575 | pathoswith | 2509 | mov edi, eax |
6726 | pathoswith | 2510 | pop eax ecx |
6462 | pathoswith | 2511 | xor edx, edx |
6726 | pathoswith | 2512 | call fs_write64_sys |
2513 | mov ecx, edi |
||
2514 | pop eax |
||
2515 | inc eax |
||
6462 | pathoswith | 2516 | xor edx, edx |
6861 | pathoswith | 2517 | .zero: |
6726 | pathoswith | 2518 | jecxz .done |
2519 | .aligned: |
||
2520 | xchg eax, ecx |
||
6462 | pathoswith | 2521 | div [ebp+EXTFS.bytesPerBlock] |
6726 | pathoswith | 2522 | push edx |
2523 | mov edx, eax |
||
2524 | .writeExtent: |
||
2525 | test edx, edx |
||
2526 | jz .end |
||
6462 | pathoswith | 2527 | push ecx |
6726 | pathoswith | 2528 | call extfsGetExtent |
2529 | jc .errorGet2 |
||
2530 | sub edx, ecx |
||
2531 | jnc @f |
||
2532 | add ecx, edx |
||
2533 | xor edx, edx |
||
2534 | @@: |
||
2535 | add [esp], ecx |
||
2536 | imul ecx, [ebp+EXTFS.sectorsPerBlock] |
||
2537 | mov ebx, esi |
||
2538 | push edx ecx |
||
2539 | mul [ebp+EXTFS.sectorsPerBlock] |
||
2540 | call fs_write64_sys |
||
2541 | test eax, eax |
||
2542 | jnz .errorDevice |
||
2543 | pop ebx edx ecx |
||
2544 | shl ebx, 9 |
||
2545 | add esi, ebx |
||
2546 | add [esp+12], ebx |
||
2547 | jmp .writeExtent |
||
2548 | |||
2549 | .end: |
||
2550 | mov eax, ecx |
||
6462 | pathoswith | 2551 | pop ecx |
6726 | pathoswith | 2552 | jecxz .done |
2553 | jmp .piece |
||
2554 | |||
2555 | .errorDevice: |
||
2556 | pop eax eax |
||
2557 | movi eax, ERROR_DEVICE |
||
2558 | .errorGet2: |
||
2559 | pop ebx |
||
2560 | .errorGet: |
||
2561 | pop ebx |
||
2562 | .errorExtend: |
||
2563 | mov [esp+4], eax |
||
2564 | .done: |
||
6558 | pathoswith | 2565 | lea ebx, [ebp+EXTFS.inodeBuffer] |
6726 | pathoswith | 2566 | pop eax |
6462 | pathoswith | 2567 | call writeInode |
6726 | pathoswith | 2568 | add [esp], eax |
6462 | pathoswith | 2569 | call writeSuperblock |
2570 | mov esi, [ebp+PARTITION.Disk] |
||
2571 | call disk_sync |
||
6726 | pathoswith | 2572 | .ret: |
6462 | pathoswith | 2573 | call ext_unlock |
6726 | pathoswith | 2574 | pop eax ebx |
6462 | pathoswith | 2575 | ret |
2576 | |||
6726 | pathoswith | 2577 | .erase: |
6849 | pathoswith | 2578 | push eax eax edi |
6726 | pathoswith | 2579 | mov eax, ebx |
2580 | jmp .write |
||
6462 | pathoswith | 2581 | |
2582 | ;---------------------------------------------------------------- |
||
2583 | ext_SetFileEnd: |
||
2584 | call extfsWritingInit |
||
6468 | pathoswith | 2585 | call findInode |
6643 | pathoswith | 2586 | jc .error2 |
6575 | pathoswith | 2587 | lea edi, [ebp+EXTFS.inodeBuffer] |
2588 | movi eax, ERROR_ACCESS_DENIED |
||
6726 | pathoswith | 2589 | test [edi+INODE.accessMode], FLAG_FILE |
2590 | jz .error2 ; not a file |
||
6849 | pathoswith | 2591 | mov eax, [ebx+4] |
2592 | mov edx, [ebx+8] |
||
6575 | pathoswith | 2593 | mov ebx, [edi+INODE.fileSize] |
6849 | pathoswith | 2594 | mov ecx, [edi+INODE.fileSizeHigh] |
2595 | push esi ecx |
||
2596 | cmp ebx, eax |
||
2597 | sbb ecx, edx |
||
2598 | mov ecx, esi |
||
6726 | pathoswith | 2599 | jnc @f |
6575 | pathoswith | 2600 | call extfsExtendFile |
6849 | pathoswith | 2601 | pop esi |
6575 | pathoswith | 2602 | jc .error |
6849 | pathoswith | 2603 | mov eax, [edi+INODE.fileSize] |
2604 | mov edx, [edi+INODE.fileSizeHigh] |
||
2605 | sub eax, ebx |
||
2606 | sbb edx, esi |
||
2607 | jnz .done |
||
2608 | cmp eax, 1000001h |
||
6726 | pathoswith | 2609 | jnc .done |
6849 | pathoswith | 2610 | push eax |
2611 | stdcall kernel_alloc, eax |
||
6726 | pathoswith | 2612 | pop ecx |
2613 | test eax, eax |
||
2614 | jz .error |
||
2615 | push ecx |
||
2616 | add ecx, 3 |
||
2617 | shr ecx, 2 |
||
6849 | pathoswith | 2618 | mov edx, esi |
6726 | pathoswith | 2619 | mov esi, eax |
6575 | pathoswith | 2620 | mov edi, eax |
2621 | xor eax, eax |
||
6726 | pathoswith | 2622 | rep stosd |
6849 | pathoswith | 2623 | pop ecx edi |
6726 | pathoswith | 2624 | push esi |
2625 | call ext_WriteFile.erase |
||
2626 | call kernel_free |
||
6575 | pathoswith | 2627 | xor eax, eax |
6726 | pathoswith | 2628 | ret |
2629 | |||
6575 | pathoswith | 2630 | @@: |
6726 | pathoswith | 2631 | call extfsTruncateFile |
6849 | pathoswith | 2632 | pop eax |
6575 | pathoswith | 2633 | .done: |
6643 | pathoswith | 2634 | xor eax, eax |
2635 | .error: |
||
2636 | xchg eax, [esp] |
||
6558 | pathoswith | 2637 | lea ebx, [ebp+EXTFS.inodeBuffer] |
6462 | pathoswith | 2638 | call writeInode |
6726 | pathoswith | 2639 | add [esp], eax |
6462 | pathoswith | 2640 | call writeSuperblock |
2641 | mov esi, [ebp+PARTITION.Disk] |
||
2642 | call disk_sync |
||
6726 | pathoswith | 2643 | pop eax |
6643 | pathoswith | 2644 | .error2: |
6726 | pathoswith | 2645 | push eax |
6462 | pathoswith | 2646 | call ext_unlock |
2647 | pop eax |
||
2648 | ret |
||
6933 | pathoswith | 2649 | |
2650 | ;---------------------------------------------------------------- |
||
2651 | ext_Rename: |
||
2652 | call extfsWritingInit |
||
2653 | push esi |
||
2654 | mov esi, edi |
||
2655 | call findInode |
||
2656 | jnc .error |
||
2657 | test edi, edi |
||
2658 | jz .error |
||
2659 | xchg [esp], esi |
||
2660 | push edi |
||
2661 | call findInode |
||
2662 | pop edi |
||
2663 | jc .error |
||
2664 | xor edx, edx |
||
2665 | inc edx |
||
2666 | test [ebp+EXTFS.inodeBuffer.accessMode], DIRECTORY |
||
2667 | jz @f |
||
2668 | inc edx |
||
2669 | @@: |
||
2670 | mov eax, ecx |
||
2671 | push ecx edx |
||
2672 | call unlinkInode |
||
2673 | pop edx ecx |
||
2674 | jc .error |
||
2675 | cmp edx, 1 |
||
2676 | jz @f |
||
2677 | lea ebx, [ebp+EXTFS.inodeBuffer] |
||
2678 | dec [ebx+INODE.linksCount] |
||
2679 | mov eax, ecx |
||
2680 | call writeInode |
||
2681 | jc .error |
||
2682 | @@: |
||
2683 | mov ebx, esi |
||
2684 | mov esi, edi |
||
2685 | pop eax |
||
2686 | push eax edx |
||
2687 | call linkInode |
||
2688 | pop edx |
||
2689 | jc .error |
||
2690 | pop eax |
||
2691 | cmp edx, 1 |
||
2692 | jz @f |
||
2693 | lea ebx, [ebp+EXTFS.inodeBuffer] |
||
2694 | inc [ebx+INODE.linksCount] |
||
2695 | call writeInode |
||
2696 | @@: |
||
2697 | call writeSuperblock |
||
2698 | mov esi, [ebp+PARTITION.Disk] |
||
2699 | call disk_sync |
||
2700 | call ext_unlock |
||
2701 | xor eax, eax |
||
2702 | ret |
||
2703 | |||
2704 | .error: |
||
2705 | push eax |
||
2706 | call ext_unlock |
||
2707 | pop eax ebx |
||
2708 | ret |