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4850 | mario79 | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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3 | ;; Copyright (C) KolibriOS team 2013-2014. 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: 4850 $ |
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9 | |||
10 | |||
3913 | dunkaist | 11 | include 'xfs.inc' |
12 | |||
13 | ; |
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14 | ; This file contains XFS related code. |
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15 | ; For more information on XFS check sources below. |
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16 | ; |
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17 | ; 1. XFS Filesystem Structure, 2nd Edition, Revision 1. Silicon Graphics Inc. 2006 |
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18 | ; 2. Linux source http://kernel.org |
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19 | ; |
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20 | |||
21 | |||
22 | ; test partition type (valid XFS one?) |
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23 | ; alloc and fill XFS (see xfs.inc) structure |
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24 | ; this function is called for each partition |
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25 | ; returns 0 (not XFS or invalid) / pointer to partition structure |
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26 | xfs_create_partition: |
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27 | push ebx ecx edx esi edi |
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28 | cmp dword[ebx + xfs_sb.sb_magicnum], XFS_SB_MAGIC ; signature |
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29 | jne .error |
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30 | |||
31 | ; TODO: check XFS.versionnum and XFS.features2 |
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32 | ; print superblock params for debugging (waiting for bug reports) |
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33 | |||
34 | movi eax, sizeof.XFS |
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35 | call malloc |
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36 | test eax, eax |
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37 | jz .error |
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38 | |||
39 | ; standard partition initialization, common for all file systems |
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40 | |||
41 | mov edi, eax |
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42 | mov eax, dword[ebp + PARTITION.FirstSector] |
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43 | mov dword[edi + XFS.FirstSector], eax |
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44 | mov eax, dword[ebp + PARTITION.FirstSector + 4] |
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45 | mov dword[edi + XFS.FirstSector + 4], eax |
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46 | mov eax, dword[ebp + PARTITION.Length] |
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47 | mov dword[edi + XFS.Length], eax |
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48 | mov eax, dword[ebp + PARTITION.Length + 4] |
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49 | mov dword[edi + XFS.Length + 4], eax |
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50 | mov eax, [ebp + PARTITION.Disk] |
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51 | mov [edi + XFS.Disk], eax |
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52 | mov [edi + XFS.FSUserFunctions], xfs_user_functions |
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53 | |||
54 | ; here we initialize only one mutex so far (for the entire partition) |
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55 | ; XFS potentially allows parallel r/w access to several AGs, keep it in mind for SMP times |
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56 | |||
57 | lea ecx, [edi + XFS.Lock] |
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58 | call mutex_init |
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59 | |||
60 | ; read superblock and fill just allocated XFS partition structure |
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61 | |||
62 | mov eax, [ebx + xfs_sb.sb_blocksize] |
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63 | bswap eax ; XFS is big endian |
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64 | mov [edi + XFS.blocksize], eax |
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65 | movzx eax, word[ebx + xfs_sb.sb_sectsize] |
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66 | xchg al, ah |
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67 | mov [edi + XFS.sectsize], eax |
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68 | movzx eax, word[ebx + xfs_sb.sb_versionnum] |
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69 | xchg al, ah |
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70 | mov [edi + XFS.versionnum], eax |
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71 | mov eax, [ebx + xfs_sb.sb_features2] |
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72 | bswap eax |
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73 | mov [edi + XFS.features2], eax |
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74 | movzx eax, word[ebx + xfs_sb.sb_inodesize] |
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75 | xchg al, ah |
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76 | mov [edi + XFS.inodesize], eax |
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77 | movzx eax, word[ebx + xfs_sb.sb_inopblock] ; inodes per block |
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78 | xchg al, ah |
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79 | mov [edi + XFS.inopblock], eax |
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80 | movzx eax, byte[ebx + xfs_sb.sb_blocklog] ; log2 of block size, in bytes |
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81 | mov [edi + XFS.blocklog], eax |
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82 | movzx eax, byte[ebx + xfs_sb.sb_sectlog] |
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83 | mov [edi + XFS.sectlog], eax |
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84 | movzx eax, byte[ebx + xfs_sb.sb_inodelog] |
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85 | mov [edi + XFS.inodelog], eax |
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86 | movzx eax, byte[ebx + xfs_sb.sb_inopblog] |
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87 | mov [edi + XFS.inopblog], eax |
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88 | movzx eax, byte[ebx + xfs_sb.sb_dirblklog] |
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89 | mov [edi + XFS.dirblklog], eax |
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90 | mov eax, dword[ebx + xfs_sb.sb_rootino + 4] ; |
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91 | bswap eax ; big |
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92 | mov dword[edi + XFS.rootino + 0], eax ; endian |
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93 | mov eax, dword[ebx + xfs_sb.sb_rootino + 0] ; 64bit |
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94 | bswap eax ; number |
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95 | mov dword[edi + XFS.rootino + 4], eax ; |
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96 | |||
97 | mov eax, [edi + XFS.blocksize] |
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98 | mov ecx, [edi + XFS.dirblklog] |
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99 | shl eax, cl |
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100 | mov [edi + XFS.dirblocksize], eax ; blocks for files, dirblocks for directories |
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101 | |||
102 | ; sector is always smaller than block |
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103 | ; so precalculate shift order to allow faster sector_num->block_num conversion |
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104 | |||
105 | mov ecx, [edi + XFS.blocklog] |
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106 | sub ecx, [edi + XFS.sectlog] |
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107 | mov [edi + XFS.blockmsectlog], ecx |
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108 | |||
109 | mov eax, 1 |
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110 | shl eax, cl |
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111 | mov [edi + XFS.sectpblock], eax |
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112 | |||
113 | ; shift order for inode_num->block_num conversion |
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114 | |||
115 | mov eax, [edi + XFS.blocklog] |
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116 | sub eax, [edi + XFS.inodelog] |
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117 | mov [edi + XFS.inodetoblocklog], eax |
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118 | |||
119 | mov eax, [ebx + xfs_sb.sb_agblocks] |
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120 | bswap eax |
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121 | mov [edi + XFS.agblocks], eax |
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122 | movzx ecx, byte[ebx + xfs_sb.sb_agblklog] |
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123 | mov [edi + XFS.agblklog], ecx |
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124 | |||
125 | ; get the mask for block numbers |
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126 | ; block numbers are AG relative! |
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127 | ; bitfield length may vary between partitions |
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128 | |||
129 | mov eax, 1 |
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130 | shl eax, cl |
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131 | dec eax |
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132 | mov dword[edi + XFS.agblockmask + 0], eax |
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133 | mov eax, 1 |
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134 | sub ecx, 32 |
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135 | jc @f |
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136 | shl eax, cl |
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137 | @@: |
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138 | dec eax |
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139 | mov dword[edi + XFS.agblockmask + 4], eax |
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140 | |||
141 | ; calculate magic offsets for directories |
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142 | |||
143 | mov ecx, [edi + XFS.blocklog] |
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144 | mov eax, XFS_DIR2_LEAF_OFFSET AND 0xffffffff ; lo |
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145 | mov edx, XFS_DIR2_LEAF_OFFSET SHR 32 ; hi |
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146 | shrd eax, edx, cl |
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147 | mov [edi + XFS.dir2_leaf_offset_blocks], eax |
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148 | |||
149 | mov ecx, [edi + XFS.blocklog] |
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150 | mov eax, XFS_DIR2_FREE_OFFSET AND 0xffffffff ; lo |
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151 | mov edx, XFS_DIR2_FREE_OFFSET SHR 32 ; hi |
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152 | shrd eax, edx, cl |
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153 | mov [edi + XFS.dir2_free_offset_blocks], eax |
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154 | |||
155 | ; mov ecx, [edi + XFS.dirblklog] |
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156 | ; mov eax, [edi + XFS.blocksize] |
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157 | ; shl eax, cl |
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158 | ; mov [edi + XFS.dirblocksize], eax |
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159 | |||
160 | mov eax, [edi + XFS.blocksize] |
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161 | call malloc |
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162 | test eax, eax |
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163 | jz .error |
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164 | mov [edi + XFS.cur_block], eax |
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165 | |||
166 | ; we do need XFS.blocksize bytes for single inode |
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167 | ; minimal file system structure is block, inodes are packed in blocks |
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168 | |||
169 | mov eax, [edi + XFS.blocksize] |
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170 | call malloc |
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171 | test eax, eax |
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172 | jz .error |
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173 | mov [edi + XFS.cur_inode], eax |
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174 | |||
175 | ; temporary inode |
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176 | ; used for browsing directories |
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177 | |||
178 | mov eax, [edi + XFS.blocksize] |
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179 | call malloc |
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180 | test eax, eax |
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181 | jz .error |
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182 | mov [edi + XFS.tmp_inode], eax |
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183 | |||
184 | ; current sector |
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185 | ; only for sector size structures like AGI |
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186 | ; inodes has usually the same size, but never store them here |
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187 | |||
188 | mov eax, [edi + XFS.sectsize] |
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189 | call malloc |
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190 | test eax, eax |
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191 | jz .error |
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192 | mov [edi + XFS.cur_sect], eax |
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193 | |||
194 | ; current directory block |
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195 | |||
196 | mov eax, [edi + XFS.dirblocksize] |
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197 | call malloc |
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198 | test eax, eax |
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199 | jz .error |
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200 | mov [edi + XFS.cur_dirblock], eax |
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201 | |||
202 | .quit: |
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203 | mov eax, edi ; return pointer to allocated XFS partition structure |
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204 | pop edi esi edx ecx ebx |
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205 | ret |
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206 | .error: |
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207 | xor eax, eax |
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208 | pop edi esi edx ecx ebx |
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209 | ret |
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210 | |||
211 | |||
212 | iglobal |
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213 | align 4 |
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214 | xfs_user_functions: |
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215 | dd xfs_free |
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216 | dd (xfs_user_functions_end - xfs_user_functions - 4) / 4 |
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217 | dd xfs_Read |
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218 | dd xfs_ReadFolder |
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219 | dd 0;xfs_Rewrite |
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220 | dd 0;xfs_Write |
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221 | dd 0;xfs_SetFileEnd |
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222 | dd xfs_GetFileInfo |
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223 | dd 0;xfs_SetFileInfo |
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224 | dd 0 |
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225 | dd 0;xfs_Delete |
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226 | dd 0;xfs_CreateFolder |
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227 | xfs_user_functions_end: |
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228 | endg |
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229 | |||
230 | |||
231 | ; lock partition access mutex |
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232 | proc xfs_lock |
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233 | ;DEBUGF 1,"xfs_lock\n" |
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234 | lea ecx, [ebp + XFS.Lock] |
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235 | jmp mutex_lock |
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236 | endp |
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237 | |||
238 | |||
239 | ; unlock partition access mutex |
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240 | proc xfs_unlock |
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241 | ;DEBUGF 1,"xfs_unlock\n" |
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242 | lea ecx, [ebp + XFS.Lock] |
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243 | jmp mutex_unlock |
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244 | endp |
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245 | |||
246 | |||
247 | ; free all the allocated memory |
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248 | ; called on partition destroy |
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249 | proc xfs_free |
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250 | push ebp |
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251 | xchg ebp, eax |
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252 | stdcall kernel_free, [ebp + XFS.cur_block] |
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253 | stdcall kernel_free, [ebp + XFS.cur_inode] |
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254 | stdcall kernel_free, [ebp + XFS.cur_sect] |
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255 | stdcall kernel_free, [ebp + XFS.cur_dirblock] |
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256 | stdcall kernel_free, [ebp + XFS.tmp_inode] |
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257 | xchg ebp, eax |
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258 | call free |
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259 | pop ebp |
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260 | ret |
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261 | endp |
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262 | |||
263 | |||
264 | ;--------------------------------------------------------------- |
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265 | ; block number (AG relative) |
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266 | ; eax -- inode_lo |
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267 | ; edx -- inode_hi |
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268 | ; ebx -- buffer |
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269 | ;--------------------------------------------------------------- |
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270 | xfs_read_block: |
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271 | push ebx esi |
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272 | |||
273 | push edx |
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274 | push eax |
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275 | |||
276 | ; XFS block numbers are AG relative |
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277 | ; they come in bitfield form of concatenated AG and block numbers |
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278 | ; to get absolute block number for fs_read32_sys we should |
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279 | ; 1. extract AG number (using precalculated mask) |
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280 | ; 2. multiply it by the AG size in blocks |
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281 | ; 3. add AG relative block number |
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282 | |||
283 | ; 1. |
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284 | mov ecx, [ebp + XFS.agblklog] |
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285 | shrd eax, edx, cl |
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286 | shr edx, cl |
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287 | ; 2. |
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288 | mul dword[ebp + XFS.agblocks] |
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289 | pop ecx |
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290 | pop esi |
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291 | and ecx, dword[ebp + XFS.agblockmask + 0] |
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292 | and esi, dword[ebp + XFS.agblockmask + 4] |
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293 | ; 3. |
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294 | add eax, ecx |
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295 | adc edx, esi |
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296 | |||
297 | ;DEBUGF 1,"read block: 0x%x%x\n",edx,eax |
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298 | ; there is no way to read file system block at once, therefore we |
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299 | ; 1. calculate the number of sectors first |
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300 | ; 2. and then read them in series |
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301 | |||
302 | ; 1. |
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303 | mov ecx, [ebp + XFS.blockmsectlog] |
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304 | shld edx, eax, cl |
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305 | shl eax, cl |
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306 | mov esi, [ebp + XFS.sectpblock] |
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307 | |||
308 | ; 2. |
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309 | .next_sector: |
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310 | push eax edx |
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311 | call fs_read32_sys |
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312 | mov ecx, eax |
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313 | pop edx eax |
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314 | test ecx, ecx |
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315 | jnz .error |
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316 | add eax, 1 ; be ready to fs_read64_sys |
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317 | adc edx, 0 |
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318 | add ebx, [ebp + XFS.sectsize] ; update buffer offset |
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319 | dec esi |
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320 | jnz .next_sector |
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321 | |||
322 | .quit: |
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323 | xor eax, eax |
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324 | pop esi ebx |
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325 | ret |
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326 | .error: |
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327 | mov eax, ecx |
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328 | pop esi ebx |
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329 | ret |
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330 | |||
331 | |||
332 | ;--------------------------------------------------------------- |
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333 | ; push buffer |
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334 | ; push startblock_hi |
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335 | ; push startblock_lo |
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336 | ; call xfs_read_dirblock |
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337 | ; test eax, eax |
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338 | ;--------------------------------------------------------------- |
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339 | xfs_read_dirblock: |
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340 | ;mov eax, [esp + 4] |
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341 | ;mov edx, [esp + 8] |
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342 | ;DEBUGF 1,"read dirblock at: %d %d\n",edx,eax |
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343 | ;DEBUGF 1,"dirblklog: %d\n",[ebp + XFS.dirblklog] |
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344 | push ebx esi |
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345 | |||
346 | mov eax, [esp + 12] ; startblock_lo |
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347 | mov edx, [esp + 16] ; startblock_hi |
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348 | mov ebx, [esp + 20] ; buffer |
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349 | |||
350 | ; dirblock >= block |
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351 | ; read dirblocks by blocks |
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352 | |||
353 | mov ecx, [ebp + XFS.dirblklog] |
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354 | mov esi, 1 |
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355 | shl esi, cl |
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356 | .next_block: |
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357 | push eax edx |
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358 | call xfs_read_block |
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359 | mov ecx, eax |
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360 | pop edx eax |
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361 | test ecx, ecx |
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362 | jnz .error |
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363 | add eax, 1 ; be ready to fs_read64_sys |
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364 | adc edx, 0 |
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365 | add ebx, [ebp + XFS.blocksize] |
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366 | dec esi |
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367 | jnz .next_block |
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368 | |||
369 | .quit: |
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370 | xor eax, eax |
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371 | pop esi ebx |
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372 | ret 12 |
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373 | .error: |
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374 | mov eax, ecx |
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375 | pop esi ebx |
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376 | ret 12 |
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377 | |||
378 | |||
379 | ;--------------------------------------------------------------- |
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380 | ; push buffer |
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381 | ; push inode_hi |
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382 | ; push inode_lo |
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383 | ; call xfs_read_inode |
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384 | ; test eax, eax |
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385 | ;--------------------------------------------------------------- |
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386 | xfs_read_inode: |
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387 | ;DEBUGF 1,"reading inode: 0x%x%x\n",[esp+8],[esp+4] |
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388 | push ebx |
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389 | mov eax, [esp + 8] ; inode_lo |
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390 | mov edx, [esp + 12] ; inode_hi |
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391 | mov ebx, [esp + 16] ; buffer |
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392 | |||
393 | ; inodes are packed into blocks |
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394 | ; 1. calculate block number |
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395 | ; 2. read the block |
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396 | ; 3. add inode offset to block base address |
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397 | |||
398 | ; 1. |
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399 | mov ecx, [ebp + XFS.inodetoblocklog] |
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400 | shrd eax, edx, cl |
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401 | shr edx, cl |
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402 | ; 2. |
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403 | call xfs_read_block |
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404 | test eax, eax |
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405 | jnz .error |
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406 | |||
407 | ; note that inode numbers should be first extracted from bitfields using mask |
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408 | |||
409 | mov eax, [esp + 8] |
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410 | mov edx, 1 |
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411 | mov ecx, [ebp + XFS.inopblog] |
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412 | shl edx, cl |
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413 | dec edx ; get inode number mask |
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414 | and eax, edx ; apply mask |
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415 | mov ecx, [ebp + XFS.inodelog] |
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416 | shl eax, cl |
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417 | add ebx, eax |
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418 | |||
419 | cmp word[ebx], XFS_DINODE_MAGIC ; test signature |
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420 | jne .error |
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421 | .quit: |
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422 | xor eax, eax |
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423 | mov edx, ebx |
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424 | pop ebx |
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425 | ret 12 |
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426 | .error: |
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427 | movi eax, ERROR_FS_FAIL |
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428 | mov edx, ebx |
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429 | pop ebx |
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430 | ret 12 |
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431 | |||
432 | |||
433 | ;---------------------------------------------------------------- |
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434 | ; push encoding ; ASCII / UNICODE |
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435 | ; push src ; inode |
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436 | ; push dst ; bdfe |
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437 | ; push entries_to_read |
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438 | ; push start_number ; from 0 |
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439 | ;---------------------------------------------------------------- |
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440 | xfs_dir_get_bdfes: |
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441 | DEBUGF 1,"xfs_dir_get_bdfes: %d entries from %d\n",[esp+8],[esp+4] |
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442 | sub esp, 4 ; local vars |
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443 | push ecx edx esi edi |
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444 | |||
445 | mov ebx, [esp + 36] ; src |
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446 | mov edx, [esp + 32] ; dst |
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447 | mov ecx, [esp + 24] ; start_number |
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448 | |||
449 | ; define directory ondisk format and jump to corresponding label |
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450 | |||
451 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_LOCAL |
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452 | jne .not_shortdir |
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453 | jmp .shortdir |
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454 | .not_shortdir: |
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455 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
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456 | jne .not_blockdir |
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457 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
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458 | bswap eax |
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459 | cmp eax, 1 |
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460 | jne .not_blockdir |
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461 | jmp .blockdir |
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462 | .not_blockdir: |
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463 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
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464 | jne .not_leafdir |
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465 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
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466 | bswap eax |
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467 | cmp eax, 4 |
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468 | ja .not_leafdir |
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469 | jmp .leafdir |
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470 | .not_leafdir: |
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471 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
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472 | jne .not_nodedir |
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473 | jmp .nodedir |
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474 | .not_nodedir: |
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475 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_BTREE |
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476 | jne .not_btreedir |
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477 | jmp .btreedir |
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478 | .not_btreedir: |
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479 | movi eax, ERROR_FS_FAIL |
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480 | jmp .error |
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481 | |||
482 | ; short form directory (all the data fits into inode) |
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483 | .shortdir: |
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484 | ;DEBUGF 1,"shortdir\n", |
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485 | movzx eax, word[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.count] |
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486 | test al, al ; is count zero? |
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487 | jnz @f ; if not, use it (i8count must be zero then) |
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488 | shr eax, 8 ; use i8count |
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489 | @@: |
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490 | add eax, 1 ; '..' and '.' are implicit |
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491 | mov dword[edx + 0], 1 ; version |
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492 | mov [edx + 8], eax ; total entries |
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493 | sub eax, [esp + 24] ; start number |
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494 | cmp eax, [esp + 28] ; entries to read |
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495 | jbe @f |
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496 | mov eax, [esp + 28] |
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497 | @@: |
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498 | mov [esp + 28], eax |
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499 | mov [edx + 4], eax ; number of actually read entries |
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500 | mov [ebp + XFS.entries_read], eax |
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501 | |||
502 | ; inode numbers are often saved as 4 bytes (iff they fit) |
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503 | ; compute the length of inode numbers |
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504 | |||
505 | mov eax, 4 ; 4 by default |
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506 | cmp byte[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.i8count], 0 |
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507 | je @f |
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508 | add eax, eax ; 4+4=8, iff i8count != 0 |
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509 | @@: |
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510 | mov dword[edx + 12], 0 ; reserved |
||
511 | mov dword[edx + 16], 0 ; |
||
512 | mov dword[edx + 20], 0 ; |
||
513 | mov dword[edx + 24], 0 ; |
||
514 | mov dword[edx + 28], 0 ; |
||
515 | add edx, 32 |
||
516 | lea esi, [ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.parent + eax] |
||
517 | dec ecx |
||
518 | js .shortdir.fill |
||
519 | |||
520 | ; skip some entries if the first entry to read is not 0 |
||
521 | |||
522 | .shortdir.skip: |
||
523 | test ecx, ecx |
||
524 | jz .shortdir.skipped |
||
525 | movzx edi, byte[esi + xfs_dir2_sf_entry.namelen] |
||
526 | lea esi, [esi + xfs_dir2_sf_entry.name + edi] |
||
527 | add esi, eax |
||
528 | dec ecx |
||
529 | jnz .shortdir.skip |
||
530 | mov ecx, [esp + 28] ; entries to read |
||
531 | jmp .shortdir.skipped |
||
532 | .shortdir.fill: |
||
533 | mov ecx, [esp + 28] ; total number |
||
534 | test ecx, ecx |
||
535 | jz .quit |
||
536 | push ecx |
||
537 | ;DEBUGF 1,"ecx: %d\n",ecx |
||
538 | lea edi, [edx + 40] ; get file name offset |
||
539 | ;DEBUGF 1,"filename: ..\n" |
||
540 | mov dword[edi], '..' |
||
541 | mov edi, edx |
||
542 | push eax ebx edx esi |
||
543 | stdcall xfs_get_inode_number_sf, dword[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.count], dword[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.parent + 4], dword[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.parent] |
||
544 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
545 | ; test eax, eax |
||
546 | ; jnz .error |
||
547 | stdcall xfs_get_inode_info, edx, edi |
||
548 | test eax, eax |
||
549 | pop esi edx ebx eax |
||
550 | jnz .error |
||
551 | mov ecx, [esp + 44] ; file name encding |
||
552 | mov [edx + 4], ecx |
||
553 | add edx, 304 ; ASCII only for now |
||
554 | pop ecx |
||
555 | dec ecx |
||
556 | jz .quit |
||
557 | |||
558 | ; push ecx |
||
559 | ; lea edi, [edx + 40] |
||
560 | ;DEBUGF 1,"filename: .\n" |
||
561 | ; mov dword[edi], '.' |
||
562 | ; mov edi, edx |
||
563 | ; push eax edx |
||
564 | ; stdcall xfs_get_inode_info, [ebp + XFS.cur_inode], edi |
||
565 | ; test eax, eax |
||
566 | ; pop edx eax |
||
567 | ; jnz .error |
||
568 | ; mov ecx, [esp + 44] |
||
569 | ; mov [edx + 4], ecx |
||
570 | ; add edx, 304 ; ASCII only for now |
||
571 | ; pop ecx |
||
572 | ; dec ecx |
||
573 | ; jz .quit |
||
574 | |||
575 | ; we skipped some entries |
||
576 | ; now we fill min(required, present) number of bdfe's |
||
577 | |||
578 | .shortdir.skipped: |
||
579 | ;DEBUGF 1,"ecx: %d\n",ecx |
||
580 | push ecx |
||
581 | movzx ecx, byte[esi + xfs_dir2_sf_entry.namelen] |
||
582 | add esi, xfs_dir2_sf_entry.name |
||
583 | lea edi, [edx + 40] ; bdfe offset of file name |
||
584 | ;DEBUGF 1,"filename: |%s|\n",esi |
||
585 | rep movsb |
||
586 | mov word[edi], 0 ; terminator (ASCIIZ) |
||
587 | |||
588 | push eax ebx ecx edx esi |
||
589 | ; push edx ; for xfs_get_inode_info |
||
590 | mov edi, edx |
||
591 | stdcall xfs_get_inode_number_sf, dword[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.count], [esi + 4], [esi] |
||
592 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
593 | ; test eax, eax |
||
594 | ; jnz .error |
||
595 | stdcall xfs_get_inode_info, edx, edi |
||
596 | test eax, eax |
||
597 | pop esi edx ecx ebx eax |
||
598 | jnz .error |
||
599 | mov ecx, [esp + 44] ; file name encoding |
||
600 | mov [edx + 4], ecx |
||
601 | |||
602 | add edx, 304 ; ASCII only for now |
||
603 | add esi, eax |
||
604 | pop ecx |
||
605 | dec ecx |
||
606 | jnz .shortdir.skipped |
||
607 | jmp .quit |
||
608 | |||
609 | .blockdir: |
||
610 | ;DEBUGF 1,"blockdir\n" |
||
611 | push edx |
||
612 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
613 | stdcall xfs_extent_unpack, eax |
||
614 | ;DEBUGF 1,"extent.br_startoff : 0x%x%x\n",[ebp+XFS.extent.br_startoff+4],[ebp+XFS.extent.br_startoff+0] |
||
615 | ;DEBUGF 1,"extent.br_startblock: 0x%x%x\n",[ebp+XFS.extent.br_startblock+4],[ebp+XFS.extent.br_startblock+0] |
||
616 | ;DEBUGF 1,"extent.br_blockcount: %d\n",[ebp+XFS.extent.br_blockcount] |
||
617 | ;DEBUGF 1,"extent.br_state : %d\n",[ebp+XFS.extent.br_state] |
||
618 | stdcall xfs_read_dirblock, dword[ebp + XFS.extent.br_startblock + 0], dword[ebp + XFS.extent.br_startblock + 4], [ebp + XFS.cur_dirblock] |
||
619 | test eax, eax |
||
620 | pop edx |
||
621 | jnz .error |
||
622 | ;DEBUGF 1,"dirblock signature: %s\n",[ebp+XFS.cur_dirblock] |
||
623 | mov ebx, [ebp + XFS.cur_dirblock] |
||
624 | mov dword[edx + 0], 1 ; version |
||
625 | mov eax, [ebp + XFS.dirblocksize] |
||
626 | mov ecx, [ebx + eax - sizeof.xfs_dir2_block_tail + xfs_dir2_block_tail.stale] |
||
627 | mov eax, [ebx + eax - sizeof.xfs_dir2_block_tail + xfs_dir2_block_tail.count] |
||
628 | bswap ecx |
||
629 | bswap eax |
||
630 | sub eax, ecx ; actual number of entries = count - stale |
||
631 | mov [edx + 8], eax ; total entries |
||
632 | ;DEBUGF 1,"total entries: %d\n",eax |
||
633 | sub eax, [esp + 24] ; start number |
||
634 | cmp eax, [esp + 28] ; entries to read |
||
635 | jbe @f |
||
636 | mov eax, [esp + 28] |
||
637 | @@: |
||
638 | mov [esp + 28], eax |
||
639 | mov [edx + 4], eax ; number of actually read entries |
||
640 | mov [ebp + XFS.entries_read], eax |
||
641 | ;DEBUGF 1,"actually read entries: %d\n",eax |
||
642 | mov dword[edx + 12], 0 ; reserved |
||
643 | mov dword[edx + 16], 0 ; |
||
644 | mov dword[edx + 20], 0 ; |
||
645 | mov dword[edx + 24], 0 ; |
||
646 | mov dword[edx + 28], 0 ; |
||
647 | add ebx, xfs_dir2_block.u |
||
648 | |||
649 | mov ecx, [esp + 24] ; start entry number |
||
650 | ; also means how many to skip |
||
651 | test ecx, ecx |
||
652 | jz .blockdir.skipped |
||
653 | .blockdir.skip: |
||
654 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
655 | jne @f |
||
656 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
657 | xchg al, ah |
||
658 | add ebx, eax |
||
659 | jmp .blockdir.skip |
||
660 | @@: |
||
661 | movzx eax, [ebx + xfs_dir2_data_union.xentry.namelen] |
||
662 | lea ebx, [ebx + xfs_dir2_data_union.xentry.name + eax + 2] ; 2 bytes for 'tag' |
||
663 | add ebx, 7 ; align on 8 bytes |
||
664 | and ebx, not 7 |
||
665 | dec ecx |
||
666 | jnz .blockdir.skip |
||
667 | .blockdir.skipped: |
||
668 | mov ecx, [edx + 4] ; actually read entries |
||
669 | test ecx, ecx |
||
670 | jz .quit |
||
671 | add edx, 32 ; set edx to the first bdfe |
||
672 | .blockdir.next_entry: |
||
673 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_NULL |
||
674 | jne @f |
||
675 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
676 | xchg al, ah |
||
677 | add ebx, eax |
||
678 | jmp .blockdir.next_entry |
||
679 | @@: |
||
680 | push ecx |
||
681 | push eax ebx ecx edx esi |
||
682 | mov edi, edx |
||
683 | mov edx, dword[ebx + xfs_dir2_data_union.xentry.inumber + 0] |
||
684 | mov eax, dword[ebx + xfs_dir2_data_union.xentry.inumber + 4] |
||
685 | bswap edx |
||
686 | bswap eax |
||
687 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
688 | stdcall xfs_get_inode_info, edx, edi |
||
689 | test eax, eax |
||
690 | pop esi edx ecx ebx eax |
||
691 | jnz .error |
||
692 | mov ecx, [esp + 44] |
||
693 | mov [edx + 4], ecx |
||
694 | lea edi, [edx + 40] |
||
695 | movzx ecx, byte[ebx + xfs_dir2_data_union.xentry.namelen] |
||
696 | lea esi, [ebx + xfs_dir2_data_union.xentry.name] |
||
697 | ;DEBUGF 1,"filename: |%s|\n",esi |
||
698 | rep movsb |
||
699 | ; call utf8_to_cp866 |
||
700 | mov word[edi], 0 ; terminator |
||
701 | lea ebx, [esi + 2] ; skip 'tag' |
||
702 | add ebx, 7 ; xfs_dir2_data_entries are aligned to 8 bytes |
||
703 | and ebx, not 7 |
||
704 | add edx, 304 |
||
705 | pop ecx |
||
706 | dec ecx |
||
707 | jnz .blockdir.next_entry |
||
708 | jmp .quit |
||
709 | |||
710 | .leafdir: |
||
711 | ;DEBUGF 1,"readdir: leaf\n" |
||
712 | mov [ebp + XFS.cur_inode_save], ebx |
||
713 | push ebx ecx edx |
||
714 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
715 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
716 | bswap edx |
||
717 | stdcall xfs_extent_list_read_dirblock, eax, [ebp + XFS.dir2_leaf_offset_blocks], 0, edx, 0xffffffff, 0xffffffff |
||
718 | mov ecx, eax |
||
719 | and ecx, edx |
||
720 | inc ecx |
||
721 | pop edx ecx ebx |
||
722 | jz .error |
||
723 | |||
724 | mov eax, [ebp + XFS.cur_dirblock] |
||
725 | movzx ecx, word[eax + xfs_dir2_leaf.hdr.stale] |
||
726 | movzx eax, word[eax + xfs_dir2_leaf.hdr.count] |
||
727 | xchg cl, ch |
||
728 | xchg al, ah |
||
729 | sub eax, ecx |
||
730 | ;DEBUGF 1,"total count: %d\n",eax |
||
731 | |||
732 | mov dword[edx + 0], 1 ; version |
||
733 | mov [edx + 8], eax ; total entries |
||
734 | sub eax, [esp + 24] ; start number |
||
735 | cmp eax, [esp + 28] ; entries to read |
||
736 | jbe @f |
||
737 | mov eax, [esp + 28] |
||
738 | @@: |
||
739 | mov [esp + 28], eax |
||
740 | mov [edx + 4], eax ; number of actually read entries |
||
741 | |||
742 | mov dword[edx + 12], 0 ; reserved |
||
743 | mov dword[edx + 16], 0 ; |
||
744 | mov dword[edx + 20], 0 ; |
||
745 | mov dword[edx + 24], 0 ; |
||
746 | mov dword[edx + 28], 0 ; |
||
747 | |||
748 | mov eax, [ebp + XFS.cur_dirblock] |
||
749 | add eax, [ebp + XFS.dirblocksize] |
||
750 | mov [ebp + XFS.max_dirblockaddr], eax |
||
751 | mov dword[ebp + XFS.next_block_num + 0], 0 |
||
752 | mov dword[ebp + XFS.next_block_num + 4], 0 |
||
753 | |||
754 | mov ebx, [ebp + XFS.max_dirblockaddr] ; to read dirblock immediately |
||
755 | mov ecx, [esp + 24] ; start number |
||
756 | test ecx, ecx |
||
757 | jz .leafdir.skipped |
||
758 | .leafdir.skip: |
||
759 | cmp ebx, [ebp + XFS.max_dirblockaddr] |
||
760 | jne @f |
||
761 | push ecx edx |
||
762 | mov ebx, [ebp + XFS.cur_inode_save] |
||
763 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
764 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
765 | bswap edx |
||
766 | stdcall xfs_extent_list_read_dirblock, eax, dword[ebp + XFS.next_block_num + 0], dword[ebp + XFS.next_block_num + 4], edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
767 | mov ecx, eax |
||
768 | and ecx, edx |
||
769 | inc ecx |
||
770 | jz .error |
||
771 | add eax, 1 |
||
772 | adc edx, 0 |
||
773 | mov dword[ebp + XFS.next_block_num + 0], eax |
||
774 | mov dword[ebp + XFS.next_block_num + 4], edx |
||
775 | mov ebx, [ebp + XFS.cur_dirblock] |
||
776 | add ebx, sizeof.xfs_dir2_data_hdr |
||
777 | pop edx ecx |
||
778 | @@: |
||
779 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
780 | jne @f |
||
781 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
782 | xchg al, ah |
||
783 | add ebx, eax |
||
784 | jmp .leafdir.skip |
||
785 | @@: |
||
786 | movzx eax, [ebx + xfs_dir2_data_union.xentry.namelen] |
||
787 | lea ebx, [ebx + xfs_dir2_data_union.xentry.name + eax + 2] ; 2 for 'tag' |
||
788 | add ebx, 7 |
||
789 | and ebx, not 7 |
||
790 | dec ecx |
||
791 | jnz .leafdir.skip |
||
792 | .leafdir.skipped: |
||
793 | mov [ebp + XFS.entries_read], 0 |
||
794 | mov ecx, [edx + 4] ; actually read entries |
||
795 | test ecx, ecx |
||
796 | jz .quit |
||
797 | add edx, 32 ; first bdfe entry |
||
798 | .leafdir.next_entry: |
||
799 | ;DEBUGF 1,"next_extry\n" |
||
800 | cmp ebx, [ebp + XFS.max_dirblockaddr] |
||
801 | jne .leafdir.process_current_block |
||
802 | push ecx edx |
||
803 | mov ebx, [ebp + XFS.cur_inode_save] |
||
804 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
805 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
806 | bswap edx |
||
807 | stdcall xfs_extent_list_read_dirblock, eax, dword[ebp + XFS.next_block_num + 0], dword[ebp + XFS.next_block_num + 4], edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
808 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
809 | mov ecx, eax |
||
810 | and ecx, edx |
||
811 | inc ecx |
||
812 | jnz @f |
||
813 | pop edx ecx |
||
814 | jmp .quit |
||
815 | @@: |
||
816 | add eax, 1 |
||
817 | adc edx, 0 |
||
818 | mov dword[ebp + XFS.next_block_num + 0], eax |
||
819 | mov dword[ebp + XFS.next_block_num + 4], edx |
||
820 | mov ebx, [ebp + XFS.cur_dirblock] |
||
821 | add ebx, sizeof.xfs_dir2_data_hdr |
||
822 | pop edx ecx |
||
823 | .leafdir.process_current_block: |
||
824 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
825 | jne @f |
||
826 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
827 | xchg al, ah |
||
828 | add ebx, eax |
||
829 | jmp .leafdir.next_entry |
||
830 | @@: |
||
831 | push eax ebx ecx edx esi |
||
832 | mov edi, edx |
||
833 | mov edx, dword[ebx + xfs_dir2_data_union.xentry.inumber + 0] |
||
834 | mov eax, dword[ebx + xfs_dir2_data_union.xentry.inumber + 4] |
||
835 | bswap edx |
||
836 | bswap eax |
||
837 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
838 | stdcall xfs_get_inode_info, edx, edi |
||
839 | test eax, eax |
||
840 | pop esi edx ecx ebx eax |
||
841 | jnz .error |
||
842 | push ecx |
||
843 | mov ecx, [esp + 44] |
||
844 | mov [edx + 4], ecx |
||
845 | lea edi, [edx + 40] |
||
846 | movzx ecx, byte[ebx + xfs_dir2_data_union.xentry.namelen] |
||
847 | lea esi, [ebx + xfs_dir2_data_union.xentry.name] |
||
848 | ;DEBUGF 1,"filename: |%s|\n",esi |
||
849 | rep movsb |
||
850 | pop ecx |
||
851 | mov word[edi], 0 |
||
852 | lea ebx, [esi + 2] ; skip 'tag' |
||
853 | add ebx, 7 ; xfs_dir2_data_entries are aligned to 8 bytes |
||
854 | and ebx, not 7 |
||
855 | add edx, 304 ; ASCII only for now |
||
856 | inc [ebp + XFS.entries_read] |
||
857 | dec ecx |
||
858 | jnz .leafdir.next_entry |
||
859 | jmp .quit |
||
860 | |||
861 | .nodedir: |
||
862 | ;DEBUGF 1,"readdir: node\n" |
||
863 | push edx |
||
864 | mov [ebp + XFS.cur_inode_save], ebx |
||
865 | mov [ebp + XFS.entries_read], 0 |
||
866 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
867 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
868 | bswap edx |
||
869 | stdcall xfs_dir2_node_get_numfiles, eax, edx, [ebp + XFS.dir2_leaf_offset_blocks] |
||
870 | pop edx |
||
871 | test eax, eax |
||
872 | jnz .error |
||
873 | mov eax, [ebp + XFS.entries_read] |
||
874 | mov [ebp + XFS.entries_read], 0 |
||
875 | ;DEBUGF 1,"numfiles: %d\n",eax |
||
876 | mov dword[edx + 0], 1 ; version |
||
877 | mov [edx + 8], eax ; total entries |
||
878 | sub eax, [esp + 24] ; start number |
||
879 | cmp eax, [esp + 28] ; entries to read |
||
880 | jbe @f |
||
881 | mov eax, [esp + 28] |
||
882 | @@: |
||
883 | mov [esp + 28], eax |
||
884 | mov [edx + 4], eax ; number of actually read entries |
||
885 | |||
886 | mov dword[edx + 12], 0 ; reserved |
||
887 | mov dword[edx + 16], 0 ; |
||
888 | mov dword[edx + 20], 0 ; |
||
889 | mov dword[edx + 24], 0 ; |
||
890 | mov dword[edx + 28], 0 ; |
||
891 | |||
892 | mov eax, [ebp + XFS.cur_dirblock] |
||
893 | add eax, [ebp + XFS.dirblocksize] |
||
894 | mov [ebp + XFS.max_dirblockaddr], eax |
||
895 | mov dword[ebp + XFS.next_block_num + 0], 0 |
||
896 | mov dword[ebp + XFS.next_block_num + 4], 0 |
||
897 | |||
898 | mov ebx, [ebp + XFS.max_dirblockaddr] ; to read dirblock immediately |
||
899 | mov ecx, [esp + 24] ; start number |
||
900 | test ecx, ecx |
||
901 | jz .leafdir.skipped |
||
902 | jmp .leafdir.skip |
||
903 | |||
904 | .btreedir: |
||
905 | ;DEBUGF 1,"readdir: btree\n" |
||
906 | mov [ebp + XFS.cur_inode_save], ebx |
||
907 | push ebx edx |
||
908 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
||
909 | bswap eax |
||
910 | mov [ebp + XFS.ro_nextents], eax |
||
911 | mov eax, [ebp + XFS.inodesize] |
||
912 | sub eax, xfs_inode.di_u |
||
913 | sub eax, sizeof.xfs_bmdr_block |
||
914 | shr eax, 4 |
||
915 | ;DEBUGF 1,"maxnumresc: %d\n",eax |
||
916 | mov edx, dword[ebx + xfs_inode.di_u + sizeof.xfs_bmdr_block + sizeof.xfs_bmbt_key*eax + 0] |
||
917 | mov eax, dword[ebx + xfs_inode.di_u + sizeof.xfs_bmdr_block + sizeof.xfs_bmbt_key*eax + 4] |
||
918 | bswap eax |
||
919 | bswap edx |
||
920 | mov ebx, [ebp + XFS.cur_block] |
||
921 | ;DEBUGF 1,"read_block: %x %x ",edx,eax |
||
922 | stdcall xfs_read_block |
||
923 | pop edx ebx |
||
924 | test eax, eax |
||
925 | jnz .error |
||
926 | ;DEBUGF 1,"ok\n" |
||
927 | |||
928 | mov ebx, [ebp + XFS.cur_block] |
||
929 | push edx |
||
930 | mov [ebp + XFS.entries_read], 0 |
||
931 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
932 | mov edx, [ebp + XFS.ro_nextents] |
||
933 | stdcall xfs_dir2_node_get_numfiles, eax, edx, [ebp + XFS.dir2_leaf_offset_blocks] |
||
934 | pop edx |
||
935 | test eax, eax |
||
936 | jnz .error |
||
937 | mov eax, [ebp + XFS.entries_read] |
||
938 | mov [ebp + XFS.entries_read], 0 |
||
939 | ;DEBUGF 1,"numfiles: %d\n",eax |
||
940 | |||
941 | mov dword[edx + 0], 1 ; version |
||
942 | mov [edx + 8], eax ; total entries |
||
943 | sub eax, [esp + 24] ; start number |
||
944 | cmp eax, [esp + 28] ; entries to read |
||
945 | jbe @f |
||
946 | mov eax, [esp + 28] |
||
947 | @@: |
||
948 | mov [esp + 28], eax |
||
949 | mov [edx + 4], eax ; number of actually read entries |
||
950 | |||
951 | mov dword[edx + 12], 0 |
||
952 | mov dword[edx + 16], 0 |
||
953 | mov dword[edx + 20], 0 |
||
954 | mov dword[edx + 24], 0 |
||
955 | mov dword[edx + 28], 0 |
||
956 | |||
957 | mov eax, [ebp + XFS.cur_dirblock] ; fsblock? |
||
958 | add eax, [ebp + XFS.dirblocksize] |
||
959 | mov [ebp + XFS.max_dirblockaddr], eax |
||
960 | mov dword[ebp + XFS.next_block_num + 0], 0 |
||
961 | mov dword[ebp + XFS.next_block_num + 4], 0 |
||
962 | |||
963 | mov ebx, [ebp + XFS.max_dirblockaddr] ; to read dirblock immediately |
||
964 | mov ecx, [esp + 24] ; start number |
||
965 | test ecx, ecx |
||
966 | jz .btreedir.skipped |
||
967 | ; jmp .btreedir.skip |
||
968 | .btreedir.skip: |
||
969 | cmp ebx, [ebp + XFS.max_dirblockaddr] |
||
970 | jne @f |
||
971 | push ecx edx |
||
972 | mov ebx, [ebp + XFS.cur_block] |
||
973 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
974 | mov edx, [ebp + XFS.ro_nextents] |
||
975 | stdcall xfs_extent_list_read_dirblock, eax, dword[ebp + XFS.next_block_num + 0], dword[ebp + XFS.next_block_num + 4], edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
976 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
977 | mov ecx, eax |
||
978 | and ecx, edx |
||
979 | inc ecx |
||
980 | jz .error |
||
981 | add eax, 1 |
||
982 | adc edx, 0 |
||
983 | mov dword[ebp + XFS.next_block_num + 0], eax |
||
984 | mov dword[ebp + XFS.next_block_num + 4], edx |
||
985 | mov ebx, [ebp + XFS.cur_dirblock] |
||
986 | add ebx, sizeof.xfs_dir2_data_hdr |
||
987 | pop edx ecx |
||
988 | @@: |
||
989 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
990 | jne @f |
||
991 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
992 | xchg al, ah |
||
993 | add ebx, eax |
||
994 | jmp .btreedir.skip |
||
995 | @@: |
||
996 | movzx eax, [ebx + xfs_dir2_data_union.xentry.namelen] |
||
997 | lea ebx, [ebx + xfs_dir2_data_union.xentry.name + eax + 2] ; 2 for 'tag' |
||
998 | add ebx, 7 |
||
999 | and ebx, not 7 |
||
1000 | dec ecx |
||
1001 | jnz .btreedir.skip |
||
1002 | .btreedir.skipped: |
||
1003 | mov [ebp + XFS.entries_read], 0 |
||
1004 | mov ecx, [edx + 4] ; actually read entries |
||
1005 | test ecx, ecx |
||
1006 | jz .quit |
||
1007 | add edx, 32 |
||
1008 | .btreedir.next_entry: |
||
1009 | ;mov eax, [ebp + XFS.entries_read] |
||
1010 | ;DEBUGF 1,"next_extry: %d\n",eax |
||
1011 | cmp ebx, [ebp + XFS.max_dirblockaddr] |
||
1012 | jne .btreedir.process_current_block |
||
1013 | push ecx edx |
||
1014 | mov ebx, [ebp + XFS.cur_block] |
||
1015 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
1016 | mov edx, [ebp + XFS.ro_nextents] |
||
1017 | stdcall xfs_extent_list_read_dirblock, eax, dword[ebp + XFS.next_block_num + 0], dword[ebp + XFS.next_block_num + 4], edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
1018 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1019 | mov ecx, eax |
||
1020 | and ecx, edx |
||
1021 | inc ecx |
||
1022 | jnz @f |
||
1023 | pop edx ecx |
||
1024 | jmp .quit |
||
1025 | @@: |
||
1026 | add eax, 1 |
||
1027 | adc edx, 0 |
||
1028 | mov dword[ebp + XFS.next_block_num + 0], eax |
||
1029 | mov dword[ebp + XFS.next_block_num + 4], edx |
||
1030 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1031 | add ebx, sizeof.xfs_dir2_data_hdr |
||
1032 | pop edx ecx |
||
1033 | .btreedir.process_current_block: |
||
1034 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
1035 | jne @f |
||
1036 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
1037 | xchg al, ah |
||
1038 | add ebx, eax |
||
1039 | jmp .btreedir.next_entry |
||
1040 | @@: |
||
1041 | push eax ebx ecx edx esi |
||
1042 | mov edi, edx |
||
1043 | mov edx, dword[ebx + xfs_dir2_data_union.xentry.inumber + 0] |
||
1044 | mov eax, dword[ebx + xfs_dir2_data_union.xentry.inumber + 4] |
||
1045 | bswap edx |
||
1046 | bswap eax |
||
1047 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
1048 | stdcall xfs_get_inode_info, edx, edi |
||
1049 | test eax, eax |
||
1050 | pop esi edx ecx ebx eax |
||
1051 | jnz .error |
||
1052 | push ecx |
||
1053 | mov ecx, [esp + 44] |
||
1054 | mov [edx + 4], ecx |
||
1055 | lea edi, [edx + 40] |
||
1056 | movzx ecx, byte[ebx + xfs_dir2_data_union.xentry.namelen] |
||
1057 | lea esi, [ebx + xfs_dir2_data_union.xentry.name] |
||
1058 | ;DEBUGF 1,"filename: |%s|\n",esi |
||
1059 | rep movsb |
||
1060 | pop ecx |
||
1061 | mov word[edi], 0 |
||
1062 | lea ebx, [esi + 2] ; skip 'tag' |
||
1063 | add ebx, 7 ; xfs_dir2_data_entries are aligned to 8 bytes |
||
1064 | and ebx, not 7 |
||
1065 | add edx, 304 |
||
1066 | inc [ebp + XFS.entries_read] |
||
1067 | dec ecx |
||
1068 | jnz .btreedir.next_entry |
||
1069 | jmp .quit |
||
1070 | |||
1071 | |||
1072 | .quit: |
||
1073 | pop edi esi edx ecx |
||
1074 | add esp, 4 ; pop vars |
||
1075 | xor eax, eax |
||
1076 | ; mov ebx, [esp + 8] |
||
1077 | mov ebx, [ebp + XFS.entries_read] |
||
1078 | DEBUGF 1,"xfs_dir_get_bdfes done: %d\n",ebx |
||
1079 | ret 20 |
||
1080 | .error: |
||
1081 | pop edi esi edx ecx |
||
1082 | add esp, 4 ; pop vars |
||
1083 | mov eax, ERROR_FS_FAIL |
||
1084 | movi ebx, -1 |
||
1085 | ret 20 |
||
1086 | |||
1087 | |||
1088 | ;---------------------------------------------------------------- |
||
1089 | ; push inode_hi |
||
1090 | ; push inode_lo |
||
1091 | ; push name |
||
1092 | ;---------------------------------------------------------------- |
||
1093 | xfs_get_inode_short: |
||
1094 | ; this function searches for the file in _current_ dir |
||
1095 | ; it is called recursively for all the subdirs /path/to/my/file |
||
1096 | |||
1097 | ;DEBUGF 1,"xfs_get_inode_short: %s\n",[esp+4] |
||
1098 | mov esi, [esp + 4] ; name |
||
1099 | movzx eax, word[esi] |
||
1100 | cmp eax, '.' ; current dir; it is already read, just return |
||
1101 | je .quit |
||
1102 | cmp eax, './' ; same thing |
||
1103 | je .quit |
||
1104 | |||
1105 | ; read inode |
||
1106 | |||
1107 | mov eax, [esp + 8] ; inode_lo |
||
1108 | mov edx, [esp + 12] ; inode_hi |
||
1109 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.cur_inode] |
||
1110 | test eax, eax |
||
1111 | movi eax, ERROR_FS_FAIL |
||
1112 | jnz .error |
||
1113 | |||
1114 | ; find file name in directory |
||
1115 | ; switch directory ondisk format |
||
1116 | |||
1117 | mov ebx, edx |
||
1118 | mov [ebp + XFS.cur_inode_save], ebx |
||
1119 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_LOCAL |
||
1120 | jne .not_shortdir |
||
1121 | ;DEBUGF 1,"dir: shortdir\n" |
||
1122 | jmp .shortdir |
||
1123 | .not_shortdir: |
||
1124 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
||
1125 | jne .not_blockdir |
||
1126 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
||
1127 | bswap eax |
||
1128 | cmp eax, 1 |
||
1129 | jne .not_blockdir |
||
1130 | jmp .blockdir |
||
1131 | .not_blockdir: |
||
1132 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
||
1133 | jne .not_leafdir |
||
1134 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
||
1135 | bswap eax |
||
1136 | cmp eax, 4 |
||
1137 | ja .not_leafdir |
||
1138 | jmp .leafdir |
||
1139 | .not_leafdir: |
||
1140 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
||
1141 | jne .not_nodedir |
||
1142 | jmp .nodedir |
||
1143 | .not_nodedir: |
||
1144 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_BTREE |
||
1145 | jne .not_btreedir |
||
1146 | jmp .btreedir |
||
1147 | .not_btreedir: |
||
1148 | DEBUGF 1,"NOT IMPLEMENTED: DIR FORMAT\n" |
||
1149 | jmp .error |
||
1150 | |||
1151 | .shortdir: |
||
1152 | .shortdir.check_parent: |
||
1153 | ; parent inode number in shortform directories is always implicit, check this case |
||
1154 | mov eax, [esi] |
||
1155 | and eax, 0x00ffffff |
||
1156 | cmp eax, '..' |
||
1157 | je .shortdir.parent2 |
||
1158 | cmp eax, '../' |
||
1159 | je .shortdir.parent3 |
||
1160 | jmp .shortdir.common |
||
1161 | .shortdir.parent3: |
||
1162 | inc esi |
||
1163 | .shortdir.parent2: |
||
1164 | add esi, 2 |
||
1165 | add ebx, xfs_inode.di_u |
||
1166 | stdcall xfs_get_inode_number_sf, dword[ebx + xfs_dir2_sf_hdr.count], dword[ebx + xfs_dir2_sf_hdr.parent + 4], dword[ebx + xfs_dir2_sf_hdr.parent] |
||
1167 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1168 | jmp .quit |
||
1169 | |||
1170 | ; not a parent inode? |
||
1171 | ; search in the list, all the other files are stored uniformly |
||
1172 | |||
1173 | .shortdir.common: |
||
1174 | mov eax, 4 |
||
1175 | movzx edx, word[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.count] ; read count (byte) and i8count (byte) at once |
||
1176 | test dl, dl ; is count zero? |
||
1177 | jnz @f |
||
1178 | shr edx, 8 ; use i8count |
||
1179 | add eax, eax ; inode_num size |
||
1180 | @@: |
||
1181 | lea edi, [ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.parent + eax] |
||
1182 | |||
1183 | .next_name: |
||
1184 | movzx ecx, byte[edi + xfs_dir2_sf_entry.namelen] |
||
1185 | add edi, xfs_dir2_sf_entry.name |
||
1186 | mov esi, [esp + 4] |
||
1187 | ;DEBUGF 1,"esi: %s\n",esi |
||
1188 | ;DEBUGF 1,"edi: %s\n",edi |
||
1189 | repe cmpsb |
||
1190 | jne @f |
||
1191 | cmp byte[esi], 0 ; HINT: use adc here? |
||
1192 | je .found |
||
1193 | cmp byte[esi], '/' |
||
1194 | je .found_inc |
||
1195 | @@: |
||
1196 | add edi, ecx |
||
1197 | add edi, eax |
||
1198 | dec edx |
||
1199 | jnz .next_name |
||
1200 | movi eax, ERROR_FILE_NOT_FOUND |
||
1201 | jmp .error |
||
1202 | .found_inc: ; increment esi to skip '/' symbol |
||
1203 | ; this means esi always points to valid file name or zero terminator byte |
||
1204 | inc esi |
||
1205 | .found: |
||
1206 | stdcall xfs_get_inode_number_sf, dword[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.count], [edi + 4], [edi] |
||
1207 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1208 | jmp .quit |
||
1209 | |||
1210 | .blockdir: |
||
1211 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1212 | stdcall xfs_extent_unpack, eax |
||
1213 | stdcall xfs_read_dirblock, dword[ebp + XFS.extent.br_startblock + 0], dword[ebp + XFS.extent.br_startblock + 4], [ebp + XFS.cur_dirblock] |
||
1214 | test eax, eax |
||
1215 | jnz .error |
||
1216 | ;DEBUGF 1,"dirblock signature: %s\n",[ebp+XFS.cur_dirblock] |
||
1217 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1218 | mov eax, [ebp + XFS.dirblocksize] |
||
1219 | mov eax, [ebx + eax - sizeof.xfs_dir2_block_tail + xfs_dir2_block_tail.count] |
||
1220 | ; note that we don't subtract xfs_dir2_block_tail.stale here, |
||
1221 | ; since we need the number of leaf entries rather than file number |
||
1222 | bswap eax |
||
1223 | add ebx, [ebp + XFS.dirblocksize] |
||
1224 | ; mov ecx, sizeof.xfs_dir2_leaf_entry |
||
1225 | imul ecx, eax, sizeof.xfs_dir2_leaf_entry |
||
1226 | sub ebx, sizeof.xfs_dir2_block_tail |
||
1227 | sub ebx, ecx |
||
1228 | shr ecx, 3 |
||
1229 | push ecx ; for xfs_get_inode_by_hash |
||
1230 | push ebx ; for xfs_get_inode_by_hash |
||
1231 | |||
1232 | mov edi, esi |
||
1233 | xor eax, eax |
||
1234 | mov ecx, 4096 ; MAX_PATH_LEN |
||
1235 | repne scasb |
||
1236 | movi eax, ERROR_FS_FAIL |
||
1237 | jne .error |
||
1238 | neg ecx |
||
1239 | add ecx, 4096 ; MAX_PATH_LEN |
||
1240 | dec ecx |
||
1241 | mov edx, ecx |
||
1242 | ;DEBUGF 1,"strlen total : %d\n",edx |
||
1243 | mov edi, esi |
||
1244 | mov eax, '/' |
||
1245 | mov ecx, edx |
||
1246 | repne scasb |
||
1247 | jne @f |
||
1248 | inc ecx |
||
1249 | @@: |
||
1250 | neg ecx |
||
1251 | add ecx, edx |
||
1252 | ;DEBUGF 1,"strlen current: %d\n",ecx |
||
1253 | stdcall xfs_hashname, esi, ecx |
||
1254 | add esi, ecx |
||
1255 | cmp byte[esi], '/' |
||
1256 | jne @f |
||
1257 | inc esi |
||
1258 | @@: |
||
1259 | ;DEBUGF 1,"hashed: 0x%x\n",eax |
||
1260 | ; bswap eax |
||
1261 | stdcall xfs_get_addr_by_hash |
||
1262 | bswap eax |
||
1263 | ;DEBUGF 1,"got address: 0x%x\n",eax |
||
1264 | cmp eax, -1 |
||
1265 | jne @f |
||
1266 | movi eax, ERROR_FILE_NOT_FOUND |
||
1267 | mov ebx, -1 |
||
1268 | jmp .error |
||
1269 | @@: |
||
1270 | shl eax, 3 |
||
1271 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1272 | add ebx, eax |
||
1273 | mov edx, [ebx + 0] |
||
1274 | mov eax, [ebx + 4] |
||
1275 | bswap edx |
||
1276 | bswap eax |
||
1277 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1278 | jmp .quit |
||
1279 | |||
1280 | .leafdir: |
||
1281 | ;DEBUGF 1,"dirblock signature: %s\n",[ebp+XFS.cur_dirblock] |
||
1282 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1283 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
1284 | bswap edx |
||
1285 | stdcall xfs_extent_list_read_dirblock, eax, [ebp + XFS.dir2_leaf_offset_blocks], 0, edx, -1, -1 |
||
1286 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1287 | mov ecx, eax |
||
1288 | and ecx, edx |
||
1289 | inc ecx |
||
1290 | jz .error |
||
1291 | |||
1292 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1293 | movzx eax, [ebx + xfs_dir2_leaf.hdr.count] |
||
1294 | ; note that we don't subtract xfs_dir2_leaf.hdr.stale here, |
||
1295 | ; since we need the number of leaf entries rather than file number |
||
1296 | xchg al, ah |
||
1297 | add ebx, xfs_dir2_leaf.ents |
||
1298 | ; imul ecx, eax, sizeof.xfs_dir2_leaf_entry |
||
1299 | ; shr ecx, 3 |
||
1300 | push eax ; for xfs_get_addr_by_hash: len |
||
1301 | push ebx ; for xfs_get_addr_by_hash: base |
||
1302 | |||
1303 | mov edi, esi |
||
1304 | xor eax, eax |
||
1305 | mov ecx, 4096 ; MAX_PATH_LEN |
||
1306 | repne scasb |
||
1307 | movi eax, ERROR_FS_FAIL |
||
1308 | jne .error |
||
1309 | neg ecx |
||
1310 | add ecx, 4096 |
||
1311 | dec ecx |
||
1312 | mov edx, ecx |
||
1313 | ;DEBUGF 1,"strlen total : %d\n",edx |
||
1314 | mov edi, esi |
||
1315 | mov eax, '/' |
||
1316 | mov ecx, edx |
||
1317 | repne scasb |
||
1318 | jne @f |
||
1319 | inc ecx |
||
1320 | @@: |
||
1321 | neg ecx |
||
1322 | add ecx, edx |
||
1323 | ;DEBUGF 1,"strlen current: %d\n",ecx |
||
1324 | stdcall xfs_hashname, esi, ecx |
||
1325 | add esi, ecx |
||
1326 | cmp byte[esi], '/' |
||
1327 | jne @f |
||
1328 | inc esi |
||
1329 | @@: |
||
1330 | ;DEBUGF 1,"hashed: 0x%x\n",eax |
||
1331 | stdcall xfs_get_addr_by_hash |
||
1332 | bswap eax |
||
1333 | ;DEBUGF 1,"got address: 0x%x\n",eax |
||
1334 | cmp eax, -1 |
||
1335 | jne @f |
||
1336 | movi eax, ERROR_FILE_NOT_FOUND |
||
1337 | mov ebx, -1 |
||
1338 | jmp .error |
||
1339 | @@: |
||
1340 | |||
1341 | mov ebx, [ebp + XFS.cur_inode_save] |
||
1342 | push esi edi |
||
1343 | xor edi, edi |
||
1344 | mov esi, eax |
||
1345 | shld edi, esi, 3 ; get offset |
||
1346 | shl esi, 3 ; 2^3 = 8 byte align |
||
1347 | mov edx, esi |
||
1348 | mov ecx, [ebp + XFS.dirblklog] |
||
1349 | add ecx, [ebp + XFS.blocklog] |
||
1350 | mov eax, 1 |
||
1351 | shl eax, cl |
||
1352 | dec eax |
||
1353 | and edx, eax |
||
1354 | push edx |
||
1355 | shrd esi, edi, cl |
||
1356 | shr edi, cl |
||
1357 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1358 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
1359 | bswap edx |
||
1360 | stdcall xfs_extent_list_read_dirblock, eax, esi, edi, edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
1361 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1362 | pop edx |
||
1363 | pop edi esi |
||
1364 | mov ecx, eax |
||
1365 | and ecx, edx |
||
1366 | inc ecx |
||
1367 | jz .error |
||
1368 | |||
1369 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1370 | add ebx, edx |
||
1371 | mov edx, [ebx + 0] |
||
1372 | mov eax, [ebx + 4] |
||
1373 | bswap edx |
||
1374 | bswap eax |
||
1375 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1376 | jmp .quit |
||
1377 | |||
1378 | .nodedir: |
||
1379 | ;DEBUGF 1,"lookupdir: node\n" |
||
1380 | mov [ebp + XFS.cur_inode_save], ebx |
||
1381 | |||
1382 | mov edi, esi |
||
1383 | xor eax, eax |
||
1384 | mov ecx, 4096 ; MAX_PATH_LEN |
||
1385 | repne scasb |
||
1386 | movi eax, ERROR_FS_FAIL |
||
1387 | jne .error |
||
1388 | neg ecx |
||
1389 | add ecx, 4096 ; MAX_PATH_LEN |
||
1390 | dec ecx |
||
1391 | mov edx, ecx |
||
1392 | ;DEBUGF 1,"strlen total : %d\n",edx |
||
1393 | mov edi, esi |
||
1394 | mov eax, '/' |
||
1395 | mov ecx, edx |
||
1396 | repne scasb |
||
1397 | jne @f |
||
1398 | inc ecx |
||
1399 | @@: |
||
1400 | neg ecx |
||
1401 | add ecx, edx |
||
1402 | ;DEBUGF 1,"strlen current: %d\n",ecx |
||
1403 | stdcall xfs_hashname, esi, ecx |
||
1404 | add esi, ecx |
||
1405 | cmp byte[esi], '/' |
||
1406 | jne @f |
||
1407 | inc esi |
||
1408 | @@: |
||
1409 | ;DEBUGF 1,"hashed: 0x%x\n",eax |
||
1410 | push edi edx |
||
1411 | mov edi, eax |
||
1412 | mov [ebp + XFS.entries_read], 0 |
||
1413 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1414 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
1415 | bswap edx |
||
1416 | stdcall xfs_dir2_lookupdir_node, eax, edx, [ebp + XFS.dir2_leaf_offset_blocks], edi |
||
1417 | pop edx edi |
||
1418 | test eax, eax |
||
1419 | jnz .error |
||
1420 | bswap ecx |
||
1421 | ;DEBUGF 1,"got address: 0x%x\n",ecx |
||
1422 | |||
1423 | mov ebx, [ebp + XFS.cur_inode_save] |
||
1424 | push esi edi |
||
1425 | xor edi, edi |
||
1426 | mov esi, ecx |
||
1427 | shld edi, esi, 3 ; get offset |
||
1428 | shl esi, 3 ; 8 byte align |
||
1429 | mov edx, esi |
||
1430 | mov ecx, [ebp + XFS.dirblklog] |
||
1431 | add ecx, [ebp + XFS.blocklog] |
||
1432 | mov eax, 1 |
||
1433 | shl eax, cl |
||
1434 | dec eax |
||
1435 | and edx, eax |
||
1436 | push edx |
||
1437 | shrd esi, edi, cl |
||
1438 | shr edi, cl |
||
1439 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1440 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
1441 | bswap edx |
||
1442 | stdcall xfs_extent_list_read_dirblock, eax, esi, edi, edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
1443 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1444 | pop edx |
||
1445 | pop edi esi |
||
1446 | mov ecx, eax |
||
1447 | and ecx, edx |
||
1448 | inc ecx |
||
1449 | jz .error |
||
1450 | |||
1451 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1452 | add ebx, edx |
||
1453 | mov edx, [ebx + 0] |
||
1454 | mov eax, [ebx + 4] |
||
1455 | bswap edx |
||
1456 | bswap eax |
||
1457 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1458 | jmp .quit |
||
1459 | |||
1460 | .btreedir: |
||
1461 | DEBUGF 1,"lookupdir: btree\n" |
||
1462 | mov [ebp + XFS.cur_inode_save], ebx |
||
1463 | |||
1464 | push ebx edx |
||
1465 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
||
1466 | bswap eax |
||
1467 | mov [ebp + XFS.ro_nextents], eax |
||
1468 | mov eax, [ebp + XFS.inodesize] |
||
1469 | sub eax, xfs_inode.di_u |
||
1470 | sub eax, sizeof.xfs_bmdr_block |
||
1471 | shr eax, 4 ; FIXME forkoff |
||
1472 | ;DEBUGF 1,"maxnumresc: %d\n",eax |
||
1473 | mov edx, dword[ebx + xfs_inode.di_u + sizeof.xfs_bmdr_block + sizeof.xfs_bmbt_key*eax + 0] |
||
1474 | mov eax, dword[ebx + xfs_inode.di_u + sizeof.xfs_bmdr_block + sizeof.xfs_bmbt_key*eax + 4] |
||
1475 | bswap eax |
||
1476 | bswap edx |
||
1477 | mov ebx, [ebp + XFS.cur_block] |
||
1478 | ;DEBUGF 1,"read_block: %x %x ",edx,eax |
||
1479 | stdcall xfs_read_block |
||
1480 | pop edx ebx |
||
1481 | test eax, eax |
||
1482 | jnz .error |
||
1483 | ;DEBUGF 1,"ok\n" |
||
1484 | mov ebx, [ebp + XFS.cur_block] |
||
1485 | |||
1486 | mov edi, esi |
||
1487 | xor eax, eax |
||
1488 | mov ecx, 4096 ; MAX_PATH_LEN |
||
1489 | repne scasb |
||
1490 | movi eax, ERROR_FS_FAIL |
||
1491 | jne .error |
||
1492 | neg ecx |
||
1493 | add ecx, 4096 |
||
1494 | dec ecx |
||
1495 | mov edx, ecx |
||
1496 | DEBUGF 1,"strlen total : %d\n",edx |
||
1497 | mov edi, esi |
||
1498 | mov eax, '/' |
||
1499 | mov ecx, edx |
||
1500 | repne scasb |
||
1501 | jne @f |
||
1502 | inc ecx |
||
1503 | @@: |
||
1504 | neg ecx |
||
1505 | add ecx, edx |
||
1506 | DEBUGF 1,"strlen current: %d\n",ecx |
||
1507 | stdcall xfs_hashname, esi, ecx |
||
1508 | add esi, ecx |
||
1509 | cmp byte[esi], '/' |
||
1510 | jne @f |
||
1511 | inc esi |
||
1512 | @@: |
||
1513 | DEBUGF 1,"hashed: 0x%x\n",eax |
||
1514 | push edi edx |
||
1515 | mov edi, eax |
||
1516 | mov [ebp + XFS.entries_read], 0 |
||
1517 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
1518 | mov edx, [ebp + XFS.ro_nextents] |
||
1519 | ;push eax |
||
1520 | ;mov eax, [ebp + XFS.dir2_leaf_offset_blocks] |
||
1521 | ;DEBUGF 1,": 0x%x %d\n",eax,eax |
||
1522 | ;pop eax |
||
1523 | stdcall xfs_dir2_lookupdir_node, eax, edx, [ebp + XFS.dir2_leaf_offset_blocks], edi |
||
1524 | pop edx edi |
||
1525 | test eax, eax |
||
1526 | jnz .error |
||
1527 | bswap ecx |
||
1528 | DEBUGF 1,"got address: 0x%x\n",ecx |
||
1529 | |||
1530 | mov ebx, [ebp + XFS.cur_block] |
||
1531 | push esi edi |
||
1532 | xor edi, edi |
||
1533 | mov esi, ecx |
||
1534 | shld edi, esi, 3 ; get offset |
||
1535 | shl esi, 3 |
||
1536 | mov edx, esi |
||
1537 | mov ecx, [ebp + XFS.dirblklog] |
||
1538 | add ecx, [ebp + XFS.blocklog] |
||
1539 | mov eax, 1 |
||
1540 | shl eax, cl |
||
1541 | dec eax |
||
1542 | and edx, eax |
||
1543 | push edx |
||
1544 | shrd esi, edi, cl |
||
1545 | shr edi, cl |
||
1546 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
1547 | mov edx, [ebp + XFS.ro_nextents] |
||
1548 | stdcall xfs_extent_list_read_dirblock, eax, esi, edi, edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
1549 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1550 | pop edx |
||
1551 | pop edi esi |
||
1552 | mov ecx, eax |
||
1553 | and ecx, edx |
||
1554 | inc ecx |
||
1555 | jz .error |
||
1556 | |||
1557 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1558 | add ebx, edx |
||
1559 | mov edx, [ebx + 0] |
||
1560 | mov eax, [ebx + 4] |
||
1561 | bswap edx |
||
1562 | bswap eax |
||
1563 | DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1564 | jmp .quit |
||
1565 | |||
1566 | .quit: |
||
1567 | ret 12 |
||
1568 | .error: |
||
1569 | xor eax, eax |
||
1570 | mov edx, eax |
||
1571 | ret 12 |
||
1572 | |||
1573 | |||
1574 | ;---------------------------------------------------------------- |
||
1575 | ; push name |
||
1576 | ; call xfs_get_inode |
||
1577 | ; test eax, eax |
||
1578 | ;---------------------------------------------------------------- |
||
1579 | xfs_get_inode: |
||
1580 | ; call xfs_get_inode_short until file is found / error returned |
||
1581 | |||
1582 | ;DEBUGF 1,"getting inode of: %s\n",[esp+4] |
||
1583 | push ebx esi edi |
||
1584 | |||
1585 | ; start from the root inode |
||
1586 | |||
1587 | mov edx, dword[ebp + XFS.rootino + 4] ; hi |
||
1588 | mov eax, dword[ebp + XFS.rootino + 0] ; lo |
||
1589 | mov esi, [esp + 16] ; name |
||
1590 | |||
1591 | .next_dir: |
||
1592 | cmp byte[esi], 0 |
||
1593 | je .found |
||
1594 | |||
1595 | ;DEBUGF 1,"next_level: |%s|\n",esi |
||
1596 | stdcall xfs_get_inode_short, esi, eax, edx |
||
1597 | test edx, edx |
||
1598 | jnz @f |
||
1599 | test eax, eax |
||
1600 | jz .error |
||
1601 | @@: |
||
1602 | jmp .next_dir ; file name found, go to next directory level |
||
1603 | |||
1604 | .found: |
||
1605 | |||
1606 | .quit: |
||
1607 | pop edi esi ebx |
||
1608 | ret 4 |
||
1609 | .error: |
||
1610 | pop edi esi ebx |
||
1611 | xor eax, eax |
||
1612 | mov edx, eax |
||
1613 | ret 4 |
||
1614 | |||
1615 | |||
1616 | ;---------------------------------------------------------------- |
||
1617 | ; xfs_ReadFolder - XFS implementation of reading a folder |
||
1618 | ; in: ebp = pointer to XFS structure |
||
1619 | ; in: esi+[esp+4] = name |
||
1620 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1621 | ; out: eax, ebx = return values for sysfunc 70 |
||
1622 | ;---------------------------------------------------------------- |
||
1623 | xfs_ReadFolder: |
||
1624 | |||
1625 | ; to read folder |
||
1626 | ; 1. lock partition |
||
1627 | ; 2. find inode number |
||
1628 | ; 3. read this inode |
||
1629 | ; 4. get bdfe's |
||
1630 | ; 5. unlock partition |
||
1631 | |||
1632 | ; 1. |
||
1633 | call xfs_lock |
||
1634 | push ecx edx esi edi |
||
1635 | |||
1636 | ; 2. |
||
1637 | push ebx esi edi |
||
1638 | add esi, [esp + 32] ; directory name |
||
1639 | ;DEBUGF 1,"xfs_ReadFolder: |%s|\n",esi |
||
1640 | stdcall xfs_get_inode, esi |
||
1641 | pop edi esi ebx |
||
1642 | mov ecx, edx |
||
1643 | or ecx, eax |
||
1644 | jnz @f |
||
1645 | movi eax, ERROR_FILE_NOT_FOUND |
||
1646 | @@: |
||
1647 | |||
1648 | ; 3. |
||
1649 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.cur_inode] |
||
1650 | test eax, eax |
||
1651 | movi eax, ERROR_FS_FAIL |
||
1652 | jnz .error |
||
1653 | |||
1654 | ; 4. |
||
1655 | mov eax, [ebx + 8] ; encoding |
||
1656 | and eax, 1 |
||
1657 | stdcall xfs_dir_get_bdfes, [ebx + 4], [ebx + 12], [ebx + 16], edx, eax |
||
1658 | test eax, eax |
||
1659 | jnz .error |
||
1660 | |||
1661 | .quit: |
||
1662 | ;DEBUGF 1,"\n\n" |
||
1663 | pop edi esi edx ecx |
||
1664 | ; 5. |
||
1665 | call xfs_unlock |
||
1666 | xor eax, eax |
||
1667 | ret |
||
1668 | .error: |
||
1669 | ;DEBUGF 1,"\n\n" |
||
1670 | pop edi esi edx ecx |
||
1671 | push eax |
||
1672 | call xfs_unlock |
||
1673 | pop eax |
||
1674 | ret |
||
1675 | |||
1676 | |||
1677 | ;---------------------------------------------------------------- |
||
1678 | ; push inode_num_hi |
||
1679 | ; push inode_num_lo |
||
1680 | ; push [count] |
||
1681 | ; call xfs_get_inode_number_sf |
||
1682 | ;---------------------------------------------------------------- |
||
1683 | xfs_get_inode_number_sf: |
||
1684 | |||
1685 | ; inode numbers in short form directories may be 4 or 8 bytes long |
||
1686 | ; determine the length in run time and read inode number at given address |
||
1687 | |||
1688 | cmp byte[esp + 4 + xfs_dir2_sf_hdr.i8count], 0 ; i8count == 0 means 4 byte per inode number |
||
1689 | je .i4bytes |
||
1690 | .i8bytes: |
||
1691 | mov edx, [esp + 12] ; hi |
||
1692 | mov eax, [esp + 8] ; lo |
||
1693 | bswap edx ; big endian |
||
1694 | bswap eax |
||
1695 | ret 12 |
||
1696 | .i4bytes: |
||
1697 | xor edx, edx ; no hi |
||
1698 | mov eax, [esp + 12] ; hi = lo |
||
1699 | bswap eax ; big endian |
||
1700 | ret 12 |
||
1701 | |||
1702 | |||
1703 | ;---------------------------------------------------------------- |
||
1704 | ; push dest |
||
1705 | ; push src |
||
1706 | ; call xfs_get_inode_info |
||
1707 | ;---------------------------------------------------------------- |
||
1708 | xfs_get_inode_info: |
||
1709 | |||
1710 | ; get access time and other file properties |
||
1711 | ; useful for browsing directories |
||
1712 | ; called for each dir entry |
||
1713 | |||
1714 | ;DEBUGF 1,"get_inode_info\n" |
||
1715 | xor eax, eax |
||
1716 | mov edx, [esp + 4] |
||
1717 | movzx ecx, word[edx + xfs_inode.di_core.di_mode] |
||
1718 | xchg cl, ch |
||
1719 | ;DEBUGF 1,"di_mode: %x\n",ecx |
||
1720 | test ecx, S_IFDIR ; directory? |
||
1721 | jz @f |
||
1722 | mov eax, 0x10 ; set directory flag |
||
1723 | @@: |
||
1724 | |||
1725 | mov edi, [esp + 8] |
||
1726 | mov [edi + 0], eax |
||
1727 | mov eax, dword[edx + xfs_inode.di_core.di_size + 0] ; hi |
||
1728 | bswap eax |
||
1729 | mov dword[edi + 36], eax ; file size hi |
||
1730 | ;DEBUGF 1,"file_size hi: %d\n",eax |
||
1731 | mov eax, dword[edx + xfs_inode.di_core.di_size + 4] ; lo |
||
1732 | bswap eax |
||
1733 | mov dword[edi + 32], eax ; file size lo |
||
1734 | ;DEBUGF 1,"file_size lo: %d\n",eax |
||
1735 | |||
1736 | add edi, 8 |
||
1737 | mov eax, [edx + xfs_inode.di_core.di_ctime.t_sec] |
||
1738 | bswap eax |
||
1739 | push edx |
||
1740 | xor edx, edx |
||
1741 | add eax, 3054539008 ;(369 * 365 + 89) * 24 * 3600 |
||
1742 | adc edx, 2 |
||
1743 | call ntfs_datetime_to_bdfe.sec |
||
1744 | pop edx |
||
1745 | |||
1746 | mov eax, [edx + xfs_inode.di_core.di_atime.t_sec] |
||
1747 | bswap eax |
||
1748 | push edx |
||
1749 | xor edx, edx |
||
1750 | add eax, 3054539008 ;(369 * 365 + 89) * 24 * 3600 |
||
1751 | adc edx, 2 |
||
1752 | call ntfs_datetime_to_bdfe.sec |
||
1753 | pop edx |
||
1754 | |||
1755 | mov eax, [edx + xfs_inode.di_core.di_mtime.t_sec] |
||
1756 | bswap eax |
||
1757 | push edx |
||
1758 | xor edx, edx |
||
1759 | add eax, 3054539008 ;(369 * 365 + 89) * 24 * 3600 |
||
1760 | adc edx, 2 |
||
1761 | call ntfs_datetime_to_bdfe.sec |
||
1762 | pop edx |
||
1763 | |||
1764 | .quit: |
||
1765 | xor eax, eax |
||
1766 | ret 8 |
||
1767 | .error: |
||
1768 | movi eax, ERROR_FS_FAIL |
||
1769 | ret 8 |
||
1770 | |||
1771 | |||
1772 | ;---------------------------------------------------------------- |
||
1773 | ; push extent_data |
||
1774 | ; call xfs_extent_unpack |
||
1775 | ;---------------------------------------------------------------- |
||
1776 | xfs_extent_unpack: |
||
1777 | |||
1778 | ; extents come as packet 128bit bitfields |
||
1779 | ; lets unpack them to access internal fields |
||
1780 | ; write result to the XFS.extent structure |
||
1781 | |||
1782 | push eax ebx ecx edx |
||
1783 | mov ebx, [esp + 20] |
||
1784 | |||
1785 | xor eax, eax |
||
1786 | mov edx, [ebx + 0] |
||
1787 | bswap edx |
||
1788 | test edx, 0x80000000 ; mask, see documentation |
||
1789 | setnz al |
||
1790 | mov [ebp + XFS.extent.br_state], eax |
||
1791 | |||
1792 | and edx, 0x7fffffff ; mask |
||
1793 | mov eax, [ebx + 4] |
||
1794 | bswap eax |
||
1795 | shrd eax, edx, 9 |
||
1796 | shr edx, 9 |
||
1797 | mov dword[ebp + XFS.extent.br_startoff + 0], eax |
||
1798 | mov dword[ebp + XFS.extent.br_startoff + 4], edx |
||
1799 | |||
1800 | mov edx, [ebx + 4] |
||
1801 | mov eax, [ebx + 8] |
||
1802 | mov ecx, [ebx + 12] |
||
1803 | bswap edx |
||
1804 | bswap eax |
||
1805 | bswap ecx |
||
1806 | and edx, 0x000001ff ; mask |
||
1807 | shrd ecx, eax, 21 |
||
1808 | shrd eax, edx, 21 |
||
1809 | mov dword[ebp + XFS.extent.br_startblock + 0], ecx |
||
1810 | mov dword[ebp + XFS.extent.br_startblock + 4], eax |
||
1811 | |||
1812 | mov eax, [ebx + 12] |
||
1813 | bswap eax |
||
1814 | and eax, 0x001fffff ; mask |
||
1815 | mov [ebp + XFS.extent.br_blockcount], eax |
||
1816 | |||
1817 | pop edx ecx ebx eax |
||
1818 | ;DEBUGF 1,"extent.br_startoff : %d %d\n",[ebp+XFS.extent.br_startoff+4],[ebp+XFS.extent.br_startoff+0] |
||
1819 | ;DEBUGF 1,"extent.br_startblock: %d %d\n",[ebp+XFS.extent.br_startblock+4],[ebp+XFS.extent.br_startblock+0] |
||
1820 | ;DEBUGF 1,"extent.br_blockcount: %d\n",[ebp+XFS.extent.br_blockcount] |
||
1821 | ;DEBUGF 1,"extent.br_state : %d\n",[ebp+XFS.extent.br_state] |
||
1822 | ret 4 |
||
1823 | |||
1824 | |||
1825 | ;---------------------------------------------------------------- |
||
1826 | ; push namelen |
||
1827 | ; push name |
||
1828 | ; call xfs_hashname |
||
1829 | ;---------------------------------------------------------------- |
||
1830 | xfs_hashname: ; xfs_da_hashname |
||
1831 | |||
1832 | ; simple hash function |
||
1833 | ; never fails) |
||
1834 | |||
1835 | push ecx esi |
||
1836 | xor eax, eax |
||
1837 | mov esi, [esp + 12] ; name |
||
1838 | mov ecx, [esp + 16] ; namelen |
||
1839 | ;mov esi, '.' |
||
1840 | ;mov ecx, 1 |
||
1841 | ;DEBUGF 1,"hashname: %d %s\n",ecx,esi |
||
1842 | |||
1843 | @@: |
||
1844 | rol eax, 7 |
||
1845 | xor al, [esi] |
||
1846 | add esi, 1 |
||
1847 | loop @b |
||
1848 | |||
1849 | pop esi ecx |
||
1850 | ret 8 |
||
1851 | |||
1852 | |||
1853 | ;---------------------------------------------------------------- |
||
1854 | ; push len |
||
1855 | ; push base |
||
1856 | ; eax -- hash value |
||
1857 | ; call xfs_get_addr_by_hash |
||
1858 | ;---------------------------------------------------------------- |
||
1859 | xfs_get_addr_by_hash: |
||
1860 | |||
1861 | ; look for the directory entry offset by its file name hash |
||
1862 | ; allows fast file search for block, leaf and node directories |
||
1863 | ; binary (ternary) search |
||
1864 | |||
1865 | ;DEBUGF 1,"get_addr_by_hash\n" |
||
1866 | push ebx esi |
||
1867 | mov ebx, [esp + 12] ; left |
||
1868 | mov edx, [esp + 16] ; len |
||
1869 | .next: |
||
1870 | mov ecx, edx |
||
1871 | ; jecxz .error |
||
1872 | test ecx, ecx |
||
1873 | jz .error |
||
1874 | shr ecx, 1 |
||
1875 | mov esi, [ebx + ecx*8 + xfs_dir2_leaf_entry.hashval] |
||
1876 | bswap esi |
||
1877 | ;DEBUGF 1,"cmp 0x%x",esi |
||
1878 | cmp eax, esi |
||
1879 | jb .below |
||
1880 | ja .above |
||
1881 | mov eax, [ebx + ecx*8 + xfs_dir2_leaf_entry.address] |
||
1882 | pop esi ebx |
||
1883 | ret 8 |
||
1884 | .below: |
||
1885 | ;DEBUGF 1,"b\n" |
||
1886 | mov edx, ecx |
||
1887 | jmp .next |
||
1888 | .above: |
||
1889 | ;DEBUGF 1,"a\n" |
||
1890 | lea ebx, [ebx + ecx*8 + 8] |
||
1891 | sub edx, ecx |
||
1892 | dec edx |
||
1893 | jmp .next |
||
1894 | .error: |
||
1895 | mov eax, -1 |
||
1896 | pop esi ebx |
||
1897 | ret 8 |
||
1898 | |||
1899 | |||
1900 | ;---------------------------------------------------------------- |
||
1901 | ; xfs_GetFileInfo - XFS implementation of getting file info |
||
1902 | ; in: ebp = pointer to XFS structure |
||
1903 | ; in: esi+[esp+4] = name |
||
1904 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1905 | ; out: eax, ebx = return values for sysfunc 70 |
||
1906 | ;---------------------------------------------------------------- |
||
1907 | xfs_GetFileInfo: |
||
1908 | |||
1909 | ; lock partition |
||
1910 | ; get inode number by file name |
||
1911 | ; read inode |
||
1912 | ; get info |
||
1913 | ; unlock partition |
||
1914 | |||
1915 | push ecx edx esi edi |
||
1916 | call xfs_lock |
||
1917 | |||
1918 | add esi, [esp + 20] ; name |
||
1919 | ;DEBUGF 1,"xfs_GetFileInfo: |%s|\n",esi |
||
1920 | stdcall xfs_get_inode, esi |
||
1921 | mov ecx, edx |
||
1922 | or ecx, eax |
||
1923 | jnz @f |
||
1924 | movi eax, ERROR_FILE_NOT_FOUND |
||
1925 | jmp .error |
||
1926 | @@: |
||
1927 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.cur_inode] |
||
1928 | test eax, eax |
||
1929 | movi eax, ERROR_FS_FAIL |
||
1930 | jnz .error |
||
1931 | |||
1932 | stdcall xfs_get_inode_info, edx, [ebx + 16] |
||
1933 | |||
1934 | .quit: |
||
1935 | call xfs_unlock |
||
1936 | pop edi esi edx ecx |
||
1937 | xor eax, eax |
||
1938 | ;DEBUGF 1,"quit\n\n" |
||
1939 | ret |
||
1940 | .error: |
||
1941 | call xfs_unlock |
||
1942 | pop edi esi edx ecx |
||
1943 | ;DEBUGF 1,"error\n\n" |
||
1944 | ret |
||
1945 | |||
1946 | |||
1947 | ;---------------------------------------------------------------- |
||
1948 | ; xfs_Read - XFS implementation of reading a file |
||
1949 | ; in: ebp = pointer to XFS structure |
||
1950 | ; in: esi+[esp+4] = name |
||
1951 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1952 | ; out: eax, ebx = return values for sysfunc 70 |
||
1953 | ;---------------------------------------------------------------- |
||
1954 | xfs_Read: |
||
1955 | push ebx ecx edx esi edi |
||
1956 | call xfs_lock |
||
1957 | |||
1958 | add esi, [esp + 24] |
||
1959 | ;DEBUGF 1,"xfs_Read: %d %d |%s|\n",[ebx+4],[ebx+12],esi |
||
1960 | stdcall xfs_get_inode, esi |
||
1961 | mov ecx, edx |
||
1962 | or ecx, eax |
||
1963 | jnz @f |
||
1964 | movi eax, ERROR_FILE_NOT_FOUND |
||
1965 | jmp .error |
||
1966 | @@: |
||
1967 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.cur_inode] |
||
1968 | test eax, eax |
||
1969 | movi eax, ERROR_FS_FAIL |
||
1970 | jnz .error |
||
1971 | mov [ebp + XFS.cur_inode_save], edx |
||
1972 | |||
1973 | cmp byte[edx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
||
1974 | jne .not_extent_list |
||
1975 | jmp .extent_list |
||
1976 | .not_extent_list: |
||
1977 | cmp byte[edx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_BTREE |
||
1978 | jne .not_btree |
||
1979 | jmp .btree |
||
1980 | .not_btree: |
||
1981 | DEBUGF 1,"XFS: NOT IMPLEMENTED: FILE FORMAT\n" |
||
1982 | movi eax, ERROR_FS_FAIL |
||
1983 | jmp .error |
||
1984 | .extent_list: |
||
1985 | mov ecx, [ebx + 12] ; bytes to read |
||
1986 | mov edi, [ebx + 16] ; buffer for data |
||
1987 | mov esi, [ebx + 8] ; offset_hi |
||
1988 | mov ebx, [ebx + 4] ; offset_lo |
||
1989 | |||
1990 | mov eax, dword[edx + xfs_inode.di_core.di_size + 4] ; lo |
||
1991 | bswap eax |
||
1992 | mov dword[ebp + XFS.bytes_left_in_file + 0], eax ; lo |
||
1993 | mov eax, dword[edx + xfs_inode.di_core.di_size + 0] ; hi |
||
1994 | bswap eax |
||
1995 | mov dword[ebp + XFS.bytes_left_in_file + 4], eax ; hi |
||
1996 | |||
1997 | mov eax, [edx + xfs_inode.di_core.di_nextents] |
||
1998 | bswap eax |
||
1999 | mov [ebp + XFS.left_extents], eax |
||
2000 | |||
2001 | mov dword[ebp + XFS.bytes_read], 0 ; actually read bytes |
||
2002 | |||
2003 | xor eax, eax ; extent offset in list |
||
2004 | .extent_list.next_extent: |
||
2005 | ;DEBUGF 1,"extent_list.next_extent, eax: 0x%x\n",eax |
||
2006 | ;DEBUGF 1,"bytes_to_read: %d\n",ecx |
||
2007 | ;DEBUGF 1,"cur file offset: %d %d\n",esi,ebx |
||
2008 | ;DEBUGF 1,"esp: 0x%x\n",esp |
||
2009 | cmp [ebp + XFS.left_extents], 0 |
||
2010 | jne @f |
||
2011 | test ecx, ecx |
||
2012 | jz .quit |
||
2013 | movi eax, ERROR_END_OF_FILE |
||
2014 | jmp .error |
||
2015 | @@: |
||
2016 | push eax |
||
2017 | lea eax, [edx + xfs_inode.di_u + eax + xfs_bmbt_rec.l0] |
||
2018 | stdcall xfs_extent_unpack, eax |
||
2019 | pop eax |
||
2020 | dec [ebp + XFS.left_extents] |
||
2021 | add eax, sizeof.xfs_bmbt_rec |
||
2022 | push eax ebx ecx edx esi |
||
2023 | mov ecx, [ebp + XFS.blocklog] |
||
2024 | shrd ebx, esi, cl |
||
2025 | shr esi, cl |
||
2026 | cmp esi, dword[ebp + XFS.extent.br_startoff + 4] |
||
2027 | jb .extent_list.to_hole ; handle sparse files |
||
2028 | ja @f |
||
2029 | cmp ebx, dword[ebp + XFS.extent.br_startoff + 0] |
||
2030 | jb .extent_list.to_hole ; handle sparse files |
||
2031 | je .extent_list.to_extent ; read from the start of current extent |
||
2032 | @@: |
||
2033 | xor edx, edx |
||
2034 | mov eax, [ebp + XFS.extent.br_blockcount] |
||
2035 | add eax, dword[ebp + XFS.extent.br_startoff + 0] |
||
2036 | adc edx, dword[ebp + XFS.extent.br_startoff + 4] |
||
2037 | ;DEBUGF 1,"br_startoff: %d %d\n",edx,eax |
||
2038 | cmp esi, edx |
||
2039 | ja .extent_list.skip_extent |
||
2040 | jb .extent_list.to_extent |
||
2041 | cmp ebx, eax |
||
2042 | jae .extent_list.skip_extent |
||
2043 | jmp .extent_list.to_extent |
||
2044 | .extent_list.to_hole: |
||
2045 | ;DEBUGF 1,"extent_list.to_hole\n" |
||
2046 | pop esi edx ecx ebx eax |
||
2047 | jmp .extent_list.read_hole |
||
2048 | .extent_list.to_extent: |
||
2049 | ;DEBUGF 1,"extent_list.to_extent\n" |
||
2050 | pop esi edx ecx ebx eax |
||
2051 | jmp .extent_list.read_extent |
||
2052 | .extent_list.skip_extent: |
||
2053 | ;DEBUGF 1,"extent_list.skip_extent\n" |
||
2054 | pop esi edx ecx ebx eax |
||
2055 | jmp .extent_list.next_extent |
||
2056 | |||
2057 | .extent_list.read_hole: |
||
2058 | ;DEBUGF 1,"hole: offt: 0x%x%x ",esi,ebx |
||
2059 | push eax edx |
||
2060 | mov eax, dword[ebp + XFS.extent.br_startoff + 0] |
||
2061 | mov edx, dword[ebp + XFS.extent.br_startoff + 4] |
||
2062 | push esi ebx |
||
2063 | mov ebx, ecx |
||
2064 | sub eax, ebx ; get hole_size, it is 64 bit |
||
2065 | sbb edx, 0 ; now edx:eax contains the size of hole |
||
2066 | ;DEBUGF 1,"size: 0x%x%x\n",edx,eax |
||
2067 | jnz @f ; if hole size >= 2^32, write bytes_to_read zero bytes |
||
2068 | cmp eax, ecx ; if hole size >= bytes_to_read, write bytes_to_read zeros |
||
2069 | jae @f |
||
2070 | mov ecx, eax ; if hole is < than bytes_to_read, write hole size zeros |
||
2071 | @@: |
||
2072 | sub ebx, ecx ; bytes_to_read - hole_size = left_to_read |
||
2073 | add dword[esp + 0], ecx ; update pushed file offset |
||
2074 | adc dword[esp + 4], 0 |
||
2075 | xor eax, eax ; hole is made of zeros |
||
2076 | rep stosb |
||
2077 | mov ecx, ebx |
||
2078 | pop ebx esi |
||
2079 | |||
2080 | test ecx, ecx ; all requested bytes are read? |
||
2081 | pop edx eax |
||
2082 | jz .quit |
||
2083 | jmp .extent_list.read_extent ; continue from the start of unpacked extent |
||
2084 | |||
2085 | .extent_list.read_extent: |
||
2086 | ;DEBUGF 1,"extent_list.read_extent\n" |
||
2087 | push eax ebx ecx edx esi |
||
2088 | mov eax, ebx |
||
2089 | mov edx, esi |
||
2090 | mov ecx, [ebp + XFS.blocklog] |
||
2091 | shrd eax, edx, cl |
||
2092 | shr edx, cl |
||
2093 | sub eax, dword[ebp + XFS.extent.br_startoff + 0] ; skip esi:ebx ? |
||
2094 | sbb edx, dword[ebp + XFS.extent.br_startoff + 4] |
||
2095 | sub [ebp + XFS.extent.br_blockcount], eax |
||
2096 | add dword[ebp + XFS.extent.br_startblock + 0], eax |
||
2097 | adc dword[ebp + XFS.extent.br_startblock + 4], 0 |
||
2098 | .extent_list.read_extent.next_block: |
||
2099 | ;DEBUGF 1,"extent_list.read_extent.next_block\n" |
||
2100 | cmp [ebp + XFS.extent.br_blockcount], 0 ; out of blocks in current extent? |
||
2101 | jne @f |
||
2102 | pop esi edx ecx ebx eax |
||
2103 | jmp .extent_list.next_extent ; go to next extent |
||
2104 | @@: |
||
2105 | mov eax, dword[ebp + XFS.extent.br_startblock + 0] |
||
2106 | mov edx, dword[ebp + XFS.extent.br_startblock + 4] |
||
2107 | push ebx |
||
2108 | mov ebx, [ebp + XFS.cur_block] |
||
2109 | ;DEBUGF 1,"read block: 0x%x%x\n",edx,eax |
||
2110 | stdcall xfs_read_block |
||
2111 | test eax, eax |
||
2112 | pop ebx |
||
2113 | jz @f |
||
2114 | pop esi edx ecx ebx eax |
||
2115 | movi eax, ERROR_FS_FAIL |
||
2116 | jmp .error |
||
2117 | @@: |
||
2118 | dec [ebp + XFS.extent.br_blockcount] |
||
2119 | add dword[ebp + XFS.extent.br_startblock + 0], 1 |
||
2120 | adc dword[ebp + XFS.extent.br_startblock + 4], 0 |
||
2121 | mov esi, [ebp + XFS.cur_block] |
||
2122 | mov ecx, [ebp + XFS.blocklog] |
||
2123 | mov eax, 1 |
||
2124 | shl eax, cl |
||
2125 | dec eax ; get blocklog mask |
||
2126 | and eax, ebx ; offset in current block |
||
2127 | add esi, eax |
||
2128 | neg eax |
||
2129 | add eax, [ebp + XFS.blocksize] |
||
2130 | mov ecx, [esp + 8] ; pushed ecx, bytes_to_read |
||
2131 | cmp ecx, eax ; is current block enough? |
||
2132 | jbe @f ; if so, read bytes_to_read bytes |
||
2133 | mov ecx, eax ; otherwise read the block up to the end |
||
2134 | @@: |
||
2135 | sub [esp + 8], ecx ; left_to_read |
||
2136 | add [esp + 12], ecx ; update current file offset, pushed ebx |
||
2137 | sub dword[ebp + XFS.bytes_left_in_file + 0], ecx |
||
2138 | sbb dword[ebp + XFS.bytes_left_in_file + 4], 0 |
||
2139 | jnc @f |
||
2140 | add dword[ebp + XFS.bytes_left_in_file + 0], ecx |
||
2141 | mov ecx, dword[ebp + XFS.bytes_left_in_file + 0] |
||
2142 | mov dword[ebp + XFS.bytes_left_in_file + 0], 0 |
||
2143 | mov dword[ebp + XFS.bytes_left_in_file + 4], 0 |
||
2144 | @@: |
||
2145 | add [ebp + XFS.bytes_read], ecx |
||
2146 | adc [esp + 0], dword 0 ; pushed esi |
||
2147 | ;DEBUGF 1,"read data: %d\n",ecx |
||
2148 | rep movsb |
||
2149 | mov ecx, [esp + 8] |
||
2150 | ;DEBUGF 1,"left_to_read: %d\n",ecx |
||
2151 | xor ebx, ebx |
||
2152 | test ecx, ecx |
||
2153 | jz @f |
||
2154 | cmp dword[ebp + XFS.bytes_left_in_file + 4], 0 |
||
2155 | jne .extent_list.read_extent.next_block |
||
2156 | cmp dword[ebp + XFS.bytes_left_in_file + 0], 0 |
||
2157 | jne .extent_list.read_extent.next_block |
||
2158 | @@: |
||
2159 | pop esi edx ecx ebx eax |
||
2160 | jmp .quit |
||
2161 | |||
2162 | .btree: |
||
2163 | mov ecx, [ebx + 12] ; bytes to read |
||
2164 | mov [ebp + XFS.bytes_to_read], ecx |
||
2165 | mov edi, [ebx + 16] ; buffer for data |
||
2166 | mov esi, [ebx + 8] ; offset_hi |
||
2167 | mov ebx, [ebx + 4] ; offset_lo |
||
2168 | mov dword[ebp + XFS.file_offset + 0], ebx |
||
2169 | mov dword[ebp + XFS.file_offset + 4], esi |
||
2170 | mov [ebp + XFS.buffer_pos], edi |
||
2171 | |||
2172 | mov eax, dword[edx + xfs_inode.di_core.di_size + 4] ; lo |
||
2173 | bswap eax |
||
2174 | mov dword[ebp + XFS.bytes_left_in_file + 0], eax ; lo |
||
2175 | mov eax, dword[edx + xfs_inode.di_core.di_size + 0] ; hi |
||
2176 | bswap eax |
||
2177 | mov dword[ebp + XFS.bytes_left_in_file + 4], eax ; hi |
||
2178 | |||
2179 | mov eax, [edx + xfs_inode.di_core.di_nextents] |
||
2180 | bswap eax |
||
2181 | mov [ebp + XFS.left_extents], eax |
||
2182 | |||
2183 | mov dword[ebp + XFS.bytes_read], 0 ; actually read bytes |
||
2184 | |||
2185 | push ebx ecx edx esi edi |
||
2186 | mov [ebp + XFS.eof], 0 |
||
2187 | mov eax, dword[ebp + XFS.file_offset + 0] |
||
2188 | mov edx, dword[ebp + XFS.file_offset + 4] |
||
2189 | add eax, [ebp + XFS.bytes_to_read] |
||
2190 | adc edx, 0 |
||
2191 | sub eax, dword[ebp + XFS.bytes_left_in_file + 0] |
||
2192 | sbb edx, dword[ebp + XFS.bytes_left_in_file + 4] |
||
2193 | jc @f ; file_offset + bytes_to_read < file_size |
||
2194 | jz @f ; file_offset + bytes_to_read = file_size |
||
2195 | mov [ebp + XFS.eof], 1 |
||
2196 | cmp edx, 0 |
||
2197 | jne .error.eof |
||
2198 | sub dword[ebp + XFS.bytes_to_read], eax |
||
2199 | jc .error.eof |
||
2200 | jz .error.eof |
||
2201 | @@: |
||
2202 | stdcall xfs_btree_read, 0, 0, 1 |
||
2203 | pop edi esi edx ecx ebx |
||
2204 | test eax, eax |
||
2205 | jnz .error |
||
2206 | cmp [ebp + XFS.eof], 1 |
||
2207 | jne .quit |
||
2208 | jmp .error.eof |
||
2209 | |||
2210 | |||
2211 | .quit: |
||
2212 | call xfs_unlock |
||
2213 | pop edi esi edx ecx ebx |
||
2214 | xor eax, eax |
||
2215 | mov ebx, [ebp + XFS.bytes_read] |
||
2216 | ;DEBUGF 1,"quit: %d\n\n",ebx |
||
2217 | ret |
||
2218 | .error.eof: |
||
2219 | movi eax, ERROR_END_OF_FILE |
||
2220 | .error: |
||
2221 | ;DEBUGF 1,"error\n\n" |
||
2222 | call xfs_unlock |
||
2223 | pop edi esi edx ecx ebx |
||
2224 | mov ebx, [ebp + XFS.bytes_read] |
||
2225 | ret |
||
2226 | |||
2227 | |||
2228 | ;---------------------------------------------------------------- |
||
2229 | ; push max_offset_hi |
||
2230 | ; push max_offset_lo |
||
2231 | ; push nextents |
||
2232 | ; push block_number_hi |
||
2233 | ; push block_number_lo |
||
2234 | ; push extent_list |
||
2235 | ; -1 / read block number |
||
2236 | ;---------------------------------------------------------------- |
||
2237 | xfs_extent_list_read_dirblock: ; skips holes |
||
2238 | ;DEBUGF 1,"xfs_extent_list_read_dirblock\n" |
||
2239 | push ebx esi edi |
||
2240 | ;mov eax, [esp+28] |
||
2241 | ;DEBUGF 1,"nextents: %d\n",eax |
||
2242 | ;mov eax, [esp+20] |
||
2243 | ;mov edx, [esp+24] |
||
2244 | ;DEBUGF 1,"block_number: 0x%x%x\n",edx,eax |
||
2245 | ;mov eax, [esp+32] |
||
2246 | ;mov edx, [esp+36] |
||
2247 | ;DEBUGF 1,"max_addr : 0x%x%x\n",edx,eax |
||
2248 | mov ebx, [esp + 16] |
||
2249 | mov esi, [esp + 20] |
||
2250 | mov edi, [esp + 24] |
||
2251 | ; mov ecx, [esp + 28] ; nextents |
||
2252 | .next_extent: |
||
2253 | ;DEBUGF 1,"next_extent\n" |
||
2254 | dec dword[esp + 28] |
||
2255 | js .error |
||
2256 | stdcall xfs_extent_unpack, ebx |
||
2257 | add ebx, sizeof.xfs_bmbt_rec ; next extent |
||
2258 | mov edx, dword[ebp + XFS.extent.br_startoff + 4] |
||
2259 | mov eax, dword[ebp + XFS.extent.br_startoff + 0] |
||
2260 | cmp edx, [esp + 36] ; max_offset_hi |
||
2261 | ja .error |
||
2262 | jb @f |
||
2263 | cmp eax, [esp + 32] ; max_offset_lo |
||
2264 | jae .error |
||
2265 | @@: |
||
2266 | cmp edi, edx |
||
2267 | jb .hole |
||
2268 | ja .check_count |
||
2269 | cmp esi, eax |
||
2270 | jb .hole |
||
2271 | ja .check_count |
||
2272 | jmp .read_block |
||
2273 | .hole: |
||
2274 | ;DEBUGF 1,"hole\n" |
||
2275 | mov esi, eax |
||
2276 | mov edi, edx |
||
2277 | jmp .read_block |
||
2278 | .check_count: |
||
2279 | ;DEBUGF 1,"check_count\n" |
||
2280 | add eax, [ebp + XFS.extent.br_blockcount] |
||
2281 | adc edx, 0 |
||
2282 | cmp edi, edx |
||
2283 | ja .next_extent |
||
2284 | jb .read_block |
||
2285 | cmp esi, eax |
||
2286 | jae .next_extent |
||
2287 | ; jmp .read_block |
||
2288 | .read_block: |
||
2289 | ;DEBUGF 1,"read_block\n" |
||
2290 | push esi edi |
||
2291 | sub esi, dword[ebp + XFS.extent.br_startoff + 0] |
||
2292 | sbb edi, dword[ebp + XFS.extent.br_startoff + 4] |
||
2293 | add esi, dword[ebp + XFS.extent.br_startblock + 0] |
||
2294 | adc edi, dword[ebp + XFS.extent.br_startblock + 4] |
||
2295 | stdcall xfs_read_dirblock, esi, edi, [ebp + XFS.cur_dirblock] |
||
2296 | pop edx eax |
||
2297 | .quit: |
||
2298 | ;DEBUGF 1,"xfs_extent_list_read_dirblock: quit\n" |
||
2299 | pop edi esi ebx |
||
2300 | ret 24 |
||
2301 | .error: |
||
2302 | ;DEBUGF 1,"xfs_extent_list_read_dirblock: error\n" |
||
2303 | xor eax, eax |
||
2304 | dec eax |
||
2305 | mov edx, eax |
||
2306 | pop edi esi ebx |
||
2307 | ret 24 |
||
2308 | |||
2309 | |||
2310 | ;---------------------------------------------------------------- |
||
2311 | ; push dirblock_num |
||
2312 | ; push nextents |
||
2313 | ; push extent_list |
||
2314 | ;---------------------------------------------------------------- |
||
2315 | xfs_dir2_node_get_numfiles: |
||
2316 | |||
2317 | ; unfortunately, we need to set 'total entries' field |
||
2318 | ; this often requires additional effort, since there is no such a number in most directory ondisk formats |
||
2319 | |||
2320 | ;DEBUGF 1,"xfs_dir2_node_get_numfiles\n" |
||
2321 | push ebx ecx edx esi edi |
||
2322 | |||
2323 | mov eax, [esp + 24] |
||
2324 | mov edx, [esp + 28] |
||
2325 | mov esi, [esp + 32] |
||
2326 | stdcall xfs_extent_list_read_dirblock, eax, esi, 0, edx, -1, -1 |
||
2327 | mov ecx, eax |
||
2328 | and ecx, edx |
||
2329 | inc ecx |
||
2330 | jnz @f |
||
2331 | movi eax, ERROR_FS_FAIL |
||
2332 | jmp .error |
||
2333 | @@: |
||
2334 | mov ebx, [ebp + XFS.cur_dirblock] |
||
2335 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DA_NODE_MAGIC |
||
2336 | je .node |
||
2337 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DIR2_LEAFN_MAGIC |
||
2338 | je .leaf |
||
2339 | mov eax, ERROR_FS_FAIL |
||
2340 | jmp .error |
||
2341 | |||
2342 | .node: |
||
2343 | ;DEBUGF 1,".node\n" |
||
2344 | mov edi, [ebx + xfs_da_intnode.hdr.info.forw] |
||
2345 | bswap edi |
||
2346 | mov eax, [esp + 24] |
||
2347 | mov edx, [esp + 28] |
||
2348 | mov esi, [ebx + xfs_da_intnode.btree.before] |
||
2349 | bswap esi |
||
2350 | stdcall xfs_dir2_node_get_numfiles, eax, edx, esi |
||
2351 | test eax, eax |
||
2352 | jnz .error |
||
2353 | jmp .common |
||
2354 | |||
2355 | .leaf: |
||
2356 | ;DEBUGF 1,".leaf\n" |
||
2357 | movzx ecx, word[ebx + xfs_dir2_leaf.hdr.count] |
||
2358 | xchg cl, ch |
||
2359 | movzx eax, word[ebx + xfs_dir2_leaf.hdr.stale] |
||
2360 | xchg al, ah |
||
2361 | sub ecx, eax |
||
2362 | add [ebp + XFS.entries_read], ecx |
||
2363 | mov edi, [ebx + xfs_dir2_leaf.hdr.info.forw] |
||
2364 | bswap edi |
||
2365 | jmp .common |
||
2366 | |||
2367 | .common: |
||
2368 | test edi, edi |
||
2369 | jz .quit |
||
2370 | mov esi, edi |
||
2371 | mov eax, [esp + 24] |
||
2372 | mov edx, [esp + 28] |
||
2373 | stdcall xfs_dir2_node_get_numfiles, eax, edx, esi |
||
2374 | test eax, eax |
||
2375 | jnz .error |
||
2376 | jmp .quit |
||
2377 | |||
2378 | .quit: |
||
2379 | ;DEBUGF 1,".quit\n" |
||
2380 | pop edi esi edx ecx ebx |
||
2381 | xor eax, eax |
||
2382 | ret 12 |
||
2383 | .error: |
||
2384 | ;DEBUGF 1,".error\n" |
||
2385 | pop edi esi edx ecx ebx |
||
2386 | movi eax, ERROR_FS_FAIL |
||
2387 | ret 12 |
||
2388 | |||
2389 | |||
2390 | ;---------------------------------------------------------------- |
||
2391 | ; push hash |
||
2392 | ; push dirblock_num |
||
2393 | ; push nextents |
||
2394 | ; push extent_list |
||
2395 | ;---------------------------------------------------------------- |
||
2396 | xfs_dir2_lookupdir_node: |
||
2397 | DEBUGF 1,"xfs_dir2_lookupdir_node\n" |
||
2398 | push ebx edx esi edi |
||
2399 | |||
2400 | mov eax, [esp + 20] |
||
2401 | mov edx, [esp + 24] |
||
2402 | mov esi, [esp + 28] |
||
2403 | DEBUGF 1,"read dirblock: 0x%x %d\n",esi,esi |
||
2404 | stdcall xfs_extent_list_read_dirblock, eax, esi, 0, edx, -1, -1 |
||
2405 | DEBUGF 1,"dirblock read: 0x%x%x\n",edx,eax |
||
2406 | mov ecx, eax |
||
2407 | and ecx, edx |
||
2408 | inc ecx |
||
2409 | jnz @f |
||
2410 | movi eax, ERROR_FS_FAIL |
||
2411 | jmp .error |
||
2412 | @@: |
||
2413 | DEBUGF 1,"checkpoint #1\n" |
||
2414 | mov ebx, [ebp + XFS.cur_dirblock] |
||
2415 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DA_NODE_MAGIC |
||
2416 | je .node |
||
2417 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DIR2_LEAFN_MAGIC |
||
2418 | je .leaf |
||
2419 | mov eax, ERROR_FS_FAIL |
||
2420 | DEBUGF 1,"checkpoint #2\n" |
||
2421 | jmp .error |
||
2422 | |||
2423 | .node: |
||
2424 | DEBUGF 1,".node\n" |
||
2425 | mov edi, [esp + 32] ; hash |
||
2426 | movzx ecx, word[ebx + xfs_da_intnode.hdr.count] |
||
2427 | xchg cl, ch |
||
2428 | mov [ebp + XFS.left_leaves], ecx |
||
2429 | xor ecx, ecx |
||
2430 | .node.next_leaf: |
||
2431 | mov esi, [ebx + xfs_da_intnode.btree + ecx*sizeof.xfs_da_node_entry + xfs_da_node_entry.hashval] |
||
2432 | bswap esi |
||
2433 | cmp edi, esi |
||
2434 | jbe .node.leaf_found |
||
2435 | inc ecx |
||
2436 | cmp ecx, [ebp + XFS.left_leaves] |
||
2437 | jne .node.next_leaf |
||
2438 | mov eax, ERROR_FILE_NOT_FOUND |
||
2439 | jmp .error |
||
2440 | @@: |
||
2441 | .node.leaf_found: |
||
2442 | mov eax, [esp + 20] |
||
2443 | mov edx, [esp + 24] |
||
2444 | mov esi, [ebx + xfs_da_intnode.btree + ecx*sizeof.xfs_da_node_entry + xfs_da_node_entry.before] |
||
2445 | bswap esi |
||
2446 | stdcall xfs_dir2_lookupdir_node, eax, edx, esi, edi |
||
2447 | test eax, eax |
||
2448 | jz .quit |
||
2449 | movi eax, ERROR_FILE_NOT_FOUND |
||
2450 | jmp .error |
||
2451 | |||
2452 | .leaf: |
||
2453 | DEBUGF 1,".leaf\n" |
||
2454 | movzx ecx, [ebx + xfs_dir2_leaf.hdr.count] |
||
2455 | xchg cl, ch |
||
2456 | lea esi, [ebx + xfs_dir2_leaf.ents] |
||
2457 | mov eax, [esp + 32] |
||
2458 | stdcall xfs_get_addr_by_hash, esi, ecx |
||
2459 | cmp eax, -1 |
||
2460 | je .error |
||
2461 | mov ecx, eax |
||
2462 | jmp .quit |
||
2463 | |||
2464 | .quit: |
||
2465 | DEBUGF 1,".quit\n" |
||
2466 | pop edi esi edx ebx |
||
2467 | xor eax, eax |
||
2468 | ret 16 |
||
2469 | .error: |
||
2470 | DEBUGF 1,".error\n" |
||
2471 | pop edi esi edx ebx |
||
2472 | ret 16 |
||
2473 | |||
2474 | |||
2475 | ;---------------------------------------------------------------- |
||
2476 | ; push dirblock_num |
||
2477 | ; push nextents |
||
2478 | ; push extent_list |
||
2479 | ;---------------------------------------------------------------- |
||
2480 | xfs_dir2_btree_get_numfiles: |
||
2481 | ;DEBUGF 1,"xfs_dir2_node_get_numfiles\n" |
||
2482 | push ebx ecx edx esi edi |
||
2483 | |||
2484 | mov eax, [esp + 24] |
||
2485 | mov edx, [esp + 28] |
||
2486 | mov esi, [esp + 32] |
||
2487 | stdcall xfs_extent_list_read_dirblock, eax, esi, 0, edx, -1, -1 |
||
2488 | mov ecx, eax |
||
2489 | and ecx, edx |
||
2490 | inc ecx |
||
2491 | jnz @f |
||
2492 | movi eax, ERROR_FS_FAIL |
||
2493 | jmp .error |
||
2494 | @@: |
||
2495 | mov ebx, [ebp + XFS.cur_dirblock] |
||
2496 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DA_NODE_MAGIC |
||
2497 | je .node |
||
2498 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DIR2_LEAFN_MAGIC |
||
2499 | je .leaf |
||
2500 | mov eax, ERROR_FS_FAIL |
||
2501 | jmp .error |
||
2502 | |||
2503 | .node: |
||
2504 | ;DEBUGF 1,".node\n" |
||
2505 | mov edi, [ebx + xfs_da_intnode.hdr.info.forw] |
||
2506 | bswap edi |
||
2507 | mov eax, [esp + 24] |
||
2508 | mov edx, [esp + 28] |
||
2509 | mov esi, [ebx + xfs_da_intnode.btree.before] |
||
2510 | bswap esi |
||
2511 | stdcall xfs_dir2_node_get_numfiles, eax, edx, esi |
||
2512 | test eax, eax |
||
2513 | jnz .error |
||
2514 | jmp .common |
||
2515 | |||
2516 | .leaf: |
||
2517 | ;DEBUGF 1,".leaf\n" |
||
2518 | movzx ecx, word[ebx + xfs_dir2_leaf.hdr.count] |
||
2519 | xchg cl, ch |
||
2520 | movzx eax, word[ebx + xfs_dir2_leaf.hdr.stale] |
||
2521 | xchg al, ah |
||
2522 | sub ecx, eax |
||
2523 | add [ebp + XFS.entries_read], ecx |
||
2524 | mov edi, [ebx + xfs_dir2_leaf.hdr.info.forw] |
||
2525 | bswap edi |
||
2526 | jmp .common |
||
2527 | |||
2528 | .common: |
||
2529 | test edi, edi |
||
2530 | jz .quit |
||
2531 | mov esi, edi |
||
2532 | mov eax, [esp + 24] |
||
2533 | mov edx, [esp + 28] |
||
2534 | stdcall xfs_dir2_node_get_numfiles, eax, edx, esi |
||
2535 | test eax, eax |
||
2536 | jnz .error |
||
2537 | jmp .quit |
||
2538 | |||
2539 | .quit: |
||
2540 | ;DEBUGF 1,".quit\n" |
||
2541 | pop edi esi edx ecx ebx |
||
2542 | xor eax, eax |
||
2543 | ret 12 |
||
2544 | .error: |
||
2545 | ;DEBUGF 1,".error\n" |
||
2546 | pop edi esi edx ecx ebx |
||
2547 | movi eax, ERROR_FS_FAIL |
||
2548 | ret 12 |
||
2549 | |||
2550 | |||
2551 | ;---------------------------------------------------------------- |
||
2552 | ; push is_root |
||
2553 | ; push block_hi |
||
2554 | ; push block_lo |
||
2555 | ;---------------------------------------------------------------- |
||
2556 | xfs_btree_read: |
||
2557 | push ebx ecx edx esi edi |
||
2558 | cmp dword[esp + 32], 1 ; is root? |
||
2559 | je .root |
||
2560 | jmp .not_root |
||
2561 | .root: |
||
2562 | DEBUGF 1,".root\n" |
||
2563 | mov ebx, [ebp + XFS.cur_inode_save] |
||
2564 | add ebx, xfs_inode.di_u |
||
2565 | movzx edx, [ebx + xfs_bmdr_block.bb_numrecs] |
||
2566 | xchg dl, dh |
||
2567 | dec edx |
||
2568 | add ebx, sizeof.xfs_bmdr_block |
||
2569 | xor eax, eax |
||
2570 | dec eax |
||
2571 | .root.next_key: |
||
2572 | DEBUGF 1,".root.next_key\n" |
||
2573 | cmp [ebp + XFS.bytes_to_read], 0 |
||
2574 | je .quit |
||
2575 | inc eax |
||
2576 | cmp eax, edx ; out of keys? |
||
2577 | ja .root.key_found ; there is no length field, so try the last key |
||
2578 | lea edi, [ebx + sizeof.xfs_bmbt_key*eax + 0] |
||
2579 | lea esi, [ebx + sizeof.xfs_bmbt_key*eax + 4] |
||
2580 | bswap edi |
||
2581 | bswap esi |
||
2582 | mov ecx, [ebp + XFS.blocklog] |
||
2583 | shld edi, esi, cl |
||
2584 | shl esi, cl |
||
2585 | cmp edi, dword[ebp + XFS.file_offset + 4] |
||
2586 | ja .root.prev_or_hole |
||
2587 | jb .root.next_key |
||
2588 | cmp esi, dword[ebp + XFS.file_offset + 0] |
||
2589 | ja .root.prev_or_hole |
||
2590 | jb .root.next_key |
||
2591 | jmp .root.key_found |
||
2592 | .root.prev_or_hole: |
||
2593 | DEBUGF 1,".root.prev_or_hole\n" |
||
2594 | test eax, eax |
||
2595 | jz .root.hole |
||
2596 | dec eax |
||
2597 | jmp .root.key_found |
||
2598 | .root.hole: |
||
2599 | DEBUGF 1,".root.hole\n" |
||
2600 | push eax edx esi edi |
||
2601 | mov ecx, [ebp + XFS.blocklog] |
||
2602 | shld edi, esi, cl |
||
2603 | shl esi, cl |
||
2604 | sub esi, dword[ebp + XFS.file_offset + 0] |
||
2605 | sbb edi, dword[ebp + XFS.file_offset + 4] |
||
2606 | mov ecx, [ebp + XFS.bytes_to_read] |
||
2607 | cmp edi, 0 ; hole size >= 2^32 |
||
2608 | jne @f |
||
2609 | cmp ecx, esi |
||
2610 | jbe @f |
||
2611 | mov ecx, esi |
||
2612 | @@: |
||
2613 | add dword[ebp + XFS.file_offset + 0], ecx |
||
2614 | adc dword[ebp + XFS.file_offset + 4], 0 |
||
2615 | sub [ebp + XFS.bytes_to_read], ecx |
||
2616 | xor eax, eax |
||
2617 | mov edi, [ebp + XFS.buffer_pos] |
||
2618 | rep stosb |
||
2619 | mov [ebp + XFS.buffer_pos], edi |
||
2620 | pop edi esi edx eax |
||
2621 | jmp .root.next_key |
||
2622 | .root.key_found: |
||
2623 | DEBUGF 1,".root.key_found\n" |
||
2624 | mov edx, [ebp + XFS.cur_inode_save] |
||
2625 | mov eax, [ebp + XFS.inodesize] |
||
2626 | sub eax, xfs_inode.di_u |
||
2627 | cmp [edx + xfs_inode.di_core.di_forkoff], 0 |
||
2628 | je @f |
||
2629 | movzx eax, [edx + xfs_inode.di_core.di_forkoff] |
||
2630 | shl eax, XFS_DIR2_DATA_ALIGN_LOG ; 3 |
||
2631 | @@: |
||
2632 | sub eax, sizeof.xfs_bmdr_block |
||
2633 | shr eax, 4 ;log2(sizeof.xfs_bmbt_key + sizeof.xfs_bmdr_ptr) |
||
2634 | mov edx, [ebx + sizeof.xfs_bmbt_key*eax + 0] ; hi |
||
2635 | mov eax, [ebx + sizeof.xfs_bmbt_key*eax + 4] ; hi |
||
2636 | bswap edx |
||
2637 | bswap eax |
||
2638 | stdcall xfs_btree_read, eax, edx, 0 |
||
2639 | test eax, eax |
||
2640 | jnz .error |
||
2641 | jmp .root.next_key |
||
2642 | |||
2643 | .not_root: |
||
2644 | DEBUGF 1,".root.not_root\n" |
||
2645 | mov eax, [esp + 24] ; block_lo |
||
2646 | mov edx, [esp + 28] ; block_hi |
||
2647 | mov ebx, [ebp + XFS.cur_block] |
||
2648 | stdcall xfs_read_block |
||
2649 | test eax, eax |
||
2650 | jnz .error |
||
2651 | mov ebx, [ebp + XFS.cur_block] |
||
2652 | |||
2653 | cmp [ebx + xfs_bmbt_block.bb_magic], XFS_BMAP_MAGIC |
||
2654 | jne .error |
||
2655 | cmp [ebx + xfs_bmbt_block.bb_level], 0 ; leaf? |
||
2656 | je .leaf |
||
2657 | jmp .node |
||
2658 | |||
2659 | .node: |
||
2660 | ; mov eax, [ebp + XFS.blocksize] |
||
2661 | ; sub eax, sizeof.xfs_bmbt_block |
||
2662 | ; shr eax, 4 ; maxnumrecs |
||
2663 | mov eax, dword[ebp + XFS.file_offset + 0] ; lo |
||
2664 | mov edx, dword[ebp + XFS.file_offset + 4] ; hi |
||
2665 | movzx edx, [ebx + xfs_bmbt_block.bb_numrecs] |
||
2666 | xchg dl, dh |
||
2667 | dec edx |
||
2668 | add ebx, sizeof.xfs_bmbt_block |
||
2669 | xor eax, eax |
||
2670 | dec eax |
||
2671 | .node.next_key: |
||
2672 | push eax ecx edx esi edi |
||
2673 | mov eax, [esp + 44] ; block_lo |
||
2674 | mov edx, [esp + 48] ; block_hi |
||
2675 | mov ebx, [ebp + XFS.cur_block] |
||
2676 | stdcall xfs_read_block |
||
2677 | test eax, eax |
||
2678 | jnz .error |
||
2679 | mov ebx, [ebp + XFS.cur_block] |
||
2680 | add ebx, sizeof.xfs_bmbt_block |
||
2681 | pop edi esi edx ecx eax |
||
2682 | cmp [ebp + XFS.bytes_to_read], 0 |
||
2683 | je .quit |
||
2684 | inc eax |
||
2685 | cmp eax, edx ; out of keys? |
||
2686 | ja .node.key_found ; there is no length field, so try the last key |
||
2687 | lea edi, [ebx + sizeof.xfs_bmbt_key*eax + 0] |
||
2688 | lea esi, [ebx + sizeof.xfs_bmbt_key*eax + 4] |
||
2689 | bswap edi |
||
2690 | bswap esi |
||
2691 | mov ecx, [ebp + XFS.blocklog] |
||
2692 | shld edi, esi, cl |
||
2693 | shl esi, cl |
||
2694 | cmp edi, dword[ebp + XFS.file_offset + 4] |
||
2695 | ja .node.prev_or_hole |
||
2696 | jb .node.next_key |
||
2697 | cmp esi, dword[ebp + XFS.file_offset + 0] |
||
2698 | ja .node.prev_or_hole |
||
2699 | jb .node.next_key |
||
2700 | jmp .node.key_found |
||
2701 | .node.prev_or_hole: |
||
2702 | test eax, eax |
||
2703 | jz .node.hole |
||
2704 | dec eax |
||
2705 | jmp .node.key_found |
||
2706 | .node.hole: |
||
2707 | push eax edx esi edi |
||
2708 | mov ecx, [ebp + XFS.blocklog] |
||
2709 | shld edi, esi, cl |
||
2710 | shl esi, cl |
||
2711 | sub esi, dword[ebp + XFS.file_offset + 0] |
||
2712 | sbb edi, dword[ebp + XFS.file_offset + 4] |
||
2713 | mov ecx, [ebp + XFS.bytes_to_read] |
||
2714 | cmp edi, 0 ; hole size >= 2^32 |
||
2715 | jne @f |
||
2716 | cmp ecx, esi |
||
2717 | jbe @f |
||
2718 | mov ecx, esi |
||
2719 | @@: |
||
2720 | add dword[ebp + XFS.file_offset + 0], ecx |
||
2721 | adc dword[ebp + XFS.file_offset + 4], 0 |
||
2722 | sub [ebp + XFS.bytes_to_read], ecx |
||
2723 | xor eax, eax |
||
2724 | mov edi, [ebp + XFS.buffer_pos] |
||
2725 | rep stosb |
||
2726 | mov [ebp + XFS.buffer_pos], edi |
||
2727 | pop edi esi edx eax |
||
2728 | jmp .node.next_key |
||
2729 | .node.key_found: |
||
2730 | mov edx, [ebp + XFS.cur_inode_save] |
||
2731 | mov eax, [ebp + XFS.inodesize] |
||
2732 | sub eax, xfs_inode.di_u |
||
2733 | cmp [edx + xfs_inode.di_core.di_forkoff], 0 |
||
2734 | je @f |
||
2735 | movzx eax, [edx + xfs_inode.di_core.di_forkoff] |
||
2736 | shl eax, XFS_DIR2_DATA_ALIGN_LOG ; 3 |
||
2737 | @@: |
||
2738 | sub eax, sizeof.xfs_bmdr_block |
||
2739 | shr eax, 4 ;log2(sizeof.xfs_bmbt_key + sizeof.xfs_bmdr_ptr) |
||
2740 | mov edx, [ebx + sizeof.xfs_bmbt_key*eax + 0] ; hi |
||
2741 | mov eax, [ebx + sizeof.xfs_bmbt_key*eax + 4] ; hi |
||
2742 | bswap edx |
||
2743 | bswap eax |
||
2744 | stdcall xfs_btree_read, eax, edx, 0 |
||
2745 | test eax, eax |
||
2746 | jnz .error |
||
2747 | jmp .node.next_key |
||
2748 | jmp .quit |
||
2749 | |||
2750 | .leaf: |
||
2751 | |||
2752 | jmp .quit |
||
2753 | |||
2754 | .error: |
||
2755 | pop edi esi edx ecx ebx |
||
2756 | movi eax, ERROR_FS_FAIL |
||
2757 | ret 4 |
||
2758 | .quit: |
||
2759 | pop edi esi edx ecx ebx |
||
2760 | xor eax, eax |
||
2761 | ret 4 |
||
2762 | |||
2763 | |||
2764 | ;---------------------------------------------------------------- |
||
2765 | ; push nextents |
||
2766 | ; push extent_list |
||
2767 | ; push file_offset_hi |
||
2768 | ; push file_offset_lo |
||
2769 | ;---------------------------------------------------------------- |
||
2770 | ;xfs_extent_list_read: |
||
2771 | ; push ebx 0 edx esi edi ; zero means actually_read_bytes |
||
2772 | ; |
||
2773 | ; .quit: |
||
2774 | ; pop edi esi edx ecx ebx |
||
2775 | ; xor eax, eax |
||
2776 | ; ret 24 |
||
2777 | ; .error: |
||
2778 | ; pop edi esi edx ecx ebx |
||
2779 | ; ret 24>> |