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4850 | mario79 | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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5363 | yogev_ezra | 3 | ;; Copyright (C) KolibriOS team 2013-2015. All rights reserved. ;; |
4850 | mario79 | 4 | ;; Distributed under terms of the GNU General Public License ;; |
5 | ;; ;; |
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6 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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7 | |||
8 | $Revision: 5363 $ |
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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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5089 | clevermous | 28 | cmp dword [esi+DISK.MediaInfo.SectorSize], 512 |
29 | jnz .error |
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3913 | dunkaist | 30 | cmp dword[ebx + xfs_sb.sb_magicnum], XFS_SB_MAGIC ; signature |
31 | jne .error |
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32 | |||
33 | ; TODO: check XFS.versionnum and XFS.features2 |
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34 | ; print superblock params for debugging (waiting for bug reports) |
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35 | |||
36 | movi eax, sizeof.XFS |
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37 | call malloc |
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38 | test eax, eax |
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39 | jz .error |
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40 | |||
41 | ; standard partition initialization, common for all file systems |
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42 | |||
43 | mov edi, eax |
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44 | mov eax, dword[ebp + PARTITION.FirstSector] |
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45 | mov dword[edi + XFS.FirstSector], eax |
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46 | mov eax, dword[ebp + PARTITION.FirstSector + 4] |
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47 | mov dword[edi + XFS.FirstSector + 4], eax |
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48 | mov eax, dword[ebp + PARTITION.Length] |
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49 | mov dword[edi + XFS.Length], eax |
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50 | mov eax, dword[ebp + PARTITION.Length + 4] |
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51 | mov dword[edi + XFS.Length + 4], eax |
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52 | mov eax, [ebp + PARTITION.Disk] |
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53 | mov [edi + XFS.Disk], eax |
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54 | mov [edi + XFS.FSUserFunctions], xfs_user_functions |
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55 | |||
56 | ; here we initialize only one mutex so far (for the entire partition) |
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57 | ; XFS potentially allows parallel r/w access to several AGs, keep it in mind for SMP times |
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58 | |||
59 | lea ecx, [edi + XFS.Lock] |
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60 | call mutex_init |
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61 | |||
62 | ; read superblock and fill just allocated XFS partition structure |
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63 | |||
64 | mov eax, [ebx + xfs_sb.sb_blocksize] |
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65 | bswap eax ; XFS is big endian |
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66 | mov [edi + XFS.blocksize], eax |
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67 | movzx eax, word[ebx + xfs_sb.sb_sectsize] |
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68 | xchg al, ah |
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69 | mov [edi + XFS.sectsize], eax |
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70 | movzx eax, word[ebx + xfs_sb.sb_versionnum] |
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71 | xchg al, ah |
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72 | mov [edi + XFS.versionnum], eax |
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73 | mov eax, [ebx + xfs_sb.sb_features2] |
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74 | bswap eax |
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75 | mov [edi + XFS.features2], eax |
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76 | movzx eax, word[ebx + xfs_sb.sb_inodesize] |
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77 | xchg al, ah |
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78 | mov [edi + XFS.inodesize], eax |
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79 | movzx eax, word[ebx + xfs_sb.sb_inopblock] ; inodes per block |
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80 | xchg al, ah |
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81 | mov [edi + XFS.inopblock], eax |
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82 | movzx eax, byte[ebx + xfs_sb.sb_blocklog] ; log2 of block size, in bytes |
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83 | mov [edi + XFS.blocklog], eax |
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84 | movzx eax, byte[ebx + xfs_sb.sb_sectlog] |
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85 | mov [edi + XFS.sectlog], eax |
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86 | movzx eax, byte[ebx + xfs_sb.sb_inodelog] |
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87 | mov [edi + XFS.inodelog], eax |
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88 | movzx eax, byte[ebx + xfs_sb.sb_inopblog] |
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89 | mov [edi + XFS.inopblog], eax |
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90 | movzx eax, byte[ebx + xfs_sb.sb_dirblklog] |
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91 | mov [edi + XFS.dirblklog], eax |
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92 | mov eax, dword[ebx + xfs_sb.sb_rootino + 4] ; |
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93 | bswap eax ; big |
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94 | mov dword[edi + XFS.rootino + 0], eax ; endian |
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95 | mov eax, dword[ebx + xfs_sb.sb_rootino + 0] ; 64bit |
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96 | bswap eax ; number |
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97 | mov dword[edi + XFS.rootino + 4], eax ; |
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98 | |||
99 | mov eax, [edi + XFS.blocksize] |
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100 | mov ecx, [edi + XFS.dirblklog] |
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101 | shl eax, cl |
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102 | mov [edi + XFS.dirblocksize], eax ; blocks for files, dirblocks for directories |
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103 | |||
104 | ; sector is always smaller than block |
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105 | ; so precalculate shift order to allow faster sector_num->block_num conversion |
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106 | |||
107 | mov ecx, [edi + XFS.blocklog] |
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108 | sub ecx, [edi + XFS.sectlog] |
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109 | mov [edi + XFS.blockmsectlog], ecx |
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110 | |||
111 | mov eax, 1 |
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112 | shl eax, cl |
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113 | mov [edi + XFS.sectpblock], eax |
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114 | |||
115 | ; shift order for inode_num->block_num conversion |
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116 | |||
117 | mov eax, [edi + XFS.blocklog] |
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118 | sub eax, [edi + XFS.inodelog] |
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119 | mov [edi + XFS.inodetoblocklog], eax |
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120 | |||
121 | mov eax, [ebx + xfs_sb.sb_agblocks] |
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122 | bswap eax |
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123 | mov [edi + XFS.agblocks], eax |
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124 | movzx ecx, byte[ebx + xfs_sb.sb_agblklog] |
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125 | mov [edi + XFS.agblklog], ecx |
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126 | |||
127 | ; get the mask for block numbers |
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128 | ; block numbers are AG relative! |
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129 | ; bitfield length may vary between partitions |
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130 | |||
131 | mov eax, 1 |
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132 | shl eax, cl |
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133 | dec eax |
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134 | mov dword[edi + XFS.agblockmask + 0], eax |
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135 | mov eax, 1 |
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136 | sub ecx, 32 |
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137 | jc @f |
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138 | shl eax, cl |
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139 | @@: |
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140 | dec eax |
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141 | mov dword[edi + XFS.agblockmask + 4], eax |
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142 | |||
143 | ; calculate magic offsets for directories |
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144 | |||
145 | mov ecx, [edi + XFS.blocklog] |
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146 | mov eax, XFS_DIR2_LEAF_OFFSET AND 0xffffffff ; lo |
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147 | mov edx, XFS_DIR2_LEAF_OFFSET SHR 32 ; hi |
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148 | shrd eax, edx, cl |
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149 | mov [edi + XFS.dir2_leaf_offset_blocks], eax |
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150 | |||
151 | mov ecx, [edi + XFS.blocklog] |
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152 | mov eax, XFS_DIR2_FREE_OFFSET AND 0xffffffff ; lo |
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153 | mov edx, XFS_DIR2_FREE_OFFSET SHR 32 ; hi |
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154 | shrd eax, edx, cl |
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155 | mov [edi + XFS.dir2_free_offset_blocks], eax |
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156 | |||
157 | ; mov ecx, [edi + XFS.dirblklog] |
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158 | ; mov eax, [edi + XFS.blocksize] |
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159 | ; shl eax, cl |
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160 | ; mov [edi + XFS.dirblocksize], eax |
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161 | |||
162 | mov eax, [edi + XFS.blocksize] |
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163 | call malloc |
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164 | test eax, eax |
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165 | jz .error |
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166 | mov [edi + XFS.cur_block], eax |
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167 | |||
168 | ; we do need XFS.blocksize bytes for single inode |
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169 | ; minimal file system structure is block, inodes are packed in blocks |
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170 | |||
171 | mov eax, [edi + XFS.blocksize] |
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172 | call malloc |
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173 | test eax, eax |
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174 | jz .error |
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175 | mov [edi + XFS.cur_inode], eax |
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176 | |||
177 | ; temporary inode |
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178 | ; used for browsing directories |
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179 | |||
180 | mov eax, [edi + XFS.blocksize] |
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181 | call malloc |
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182 | test eax, eax |
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183 | jz .error |
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184 | mov [edi + XFS.tmp_inode], eax |
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185 | |||
186 | ; current sector |
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187 | ; only for sector size structures like AGI |
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188 | ; inodes has usually the same size, but never store them here |
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189 | |||
190 | mov eax, [edi + XFS.sectsize] |
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191 | call malloc |
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192 | test eax, eax |
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193 | jz .error |
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194 | mov [edi + XFS.cur_sect], eax |
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195 | |||
196 | ; current directory block |
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197 | |||
198 | mov eax, [edi + XFS.dirblocksize] |
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199 | call malloc |
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200 | test eax, eax |
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201 | jz .error |
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202 | mov [edi + XFS.cur_dirblock], eax |
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203 | |||
204 | .quit: |
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205 | mov eax, edi ; return pointer to allocated XFS partition structure |
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206 | pop edi esi edx ecx ebx |
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207 | ret |
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208 | .error: |
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209 | xor eax, eax |
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210 | pop edi esi edx ecx ebx |
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211 | ret |
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212 | |||
213 | |||
214 | iglobal |
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215 | align 4 |
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216 | xfs_user_functions: |
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217 | dd xfs_free |
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218 | dd (xfs_user_functions_end - xfs_user_functions - 4) / 4 |
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219 | dd xfs_Read |
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220 | dd xfs_ReadFolder |
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221 | dd 0;xfs_Rewrite |
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222 | dd 0;xfs_Write |
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223 | dd 0;xfs_SetFileEnd |
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224 | dd xfs_GetFileInfo |
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225 | dd 0;xfs_SetFileInfo |
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226 | dd 0 |
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227 | dd 0;xfs_Delete |
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228 | dd 0;xfs_CreateFolder |
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229 | xfs_user_functions_end: |
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230 | endg |
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231 | |||
232 | |||
233 | ; lock partition access mutex |
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234 | proc xfs_lock |
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235 | ;DEBUGF 1,"xfs_lock\n" |
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236 | lea ecx, [ebp + XFS.Lock] |
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237 | jmp mutex_lock |
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238 | endp |
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239 | |||
240 | |||
241 | ; unlock partition access mutex |
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242 | proc xfs_unlock |
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243 | ;DEBUGF 1,"xfs_unlock\n" |
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244 | lea ecx, [ebp + XFS.Lock] |
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245 | jmp mutex_unlock |
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246 | endp |
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247 | |||
248 | |||
249 | ; free all the allocated memory |
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250 | ; called on partition destroy |
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251 | proc xfs_free |
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252 | push ebp |
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253 | xchg ebp, eax |
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254 | stdcall kernel_free, [ebp + XFS.cur_block] |
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255 | stdcall kernel_free, [ebp + XFS.cur_inode] |
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256 | stdcall kernel_free, [ebp + XFS.cur_sect] |
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257 | stdcall kernel_free, [ebp + XFS.cur_dirblock] |
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258 | stdcall kernel_free, [ebp + XFS.tmp_inode] |
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259 | xchg ebp, eax |
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260 | call free |
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261 | pop ebp |
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262 | ret |
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263 | endp |
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264 | |||
265 | |||
266 | ;--------------------------------------------------------------- |
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267 | ; block number (AG relative) |
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268 | ; eax -- inode_lo |
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269 | ; edx -- inode_hi |
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270 | ; ebx -- buffer |
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271 | ;--------------------------------------------------------------- |
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272 | xfs_read_block: |
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273 | push ebx esi |
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274 | |||
275 | push edx |
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276 | push eax |
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277 | |||
278 | ; XFS block numbers are AG relative |
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279 | ; they come in bitfield form of concatenated AG and block numbers |
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280 | ; to get absolute block number for fs_read32_sys we should |
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281 | ; 1. extract AG number (using precalculated mask) |
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282 | ; 2. multiply it by the AG size in blocks |
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283 | ; 3. add AG relative block number |
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284 | |||
285 | ; 1. |
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286 | mov ecx, [ebp + XFS.agblklog] |
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287 | shrd eax, edx, cl |
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288 | shr edx, cl |
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289 | ; 2. |
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290 | mul dword[ebp + XFS.agblocks] |
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291 | pop ecx |
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292 | pop esi |
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293 | and ecx, dword[ebp + XFS.agblockmask + 0] |
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294 | and esi, dword[ebp + XFS.agblockmask + 4] |
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295 | ; 3. |
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296 | add eax, ecx |
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297 | adc edx, esi |
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298 | |||
299 | ;DEBUGF 1,"read block: 0x%x%x\n",edx,eax |
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300 | ; there is no way to read file system block at once, therefore we |
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301 | ; 1. calculate the number of sectors first |
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302 | ; 2. and then read them in series |
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303 | |||
304 | ; 1. |
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305 | mov ecx, [ebp + XFS.blockmsectlog] |
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306 | shld edx, eax, cl |
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307 | shl eax, cl |
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308 | mov esi, [ebp + XFS.sectpblock] |
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309 | |||
310 | ; 2. |
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311 | .next_sector: |
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312 | push eax edx |
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313 | call fs_read32_sys |
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314 | mov ecx, eax |
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315 | pop edx eax |
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316 | test ecx, ecx |
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317 | jnz .error |
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318 | add eax, 1 ; be ready to fs_read64_sys |
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319 | adc edx, 0 |
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320 | add ebx, [ebp + XFS.sectsize] ; update buffer offset |
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321 | dec esi |
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322 | jnz .next_sector |
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323 | |||
324 | .quit: |
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325 | xor eax, eax |
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326 | pop esi ebx |
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327 | ret |
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328 | .error: |
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329 | mov eax, ecx |
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330 | pop esi ebx |
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331 | ret |
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332 | |||
333 | |||
334 | ;--------------------------------------------------------------- |
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335 | ; push buffer |
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336 | ; push startblock_hi |
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337 | ; push startblock_lo |
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338 | ; call xfs_read_dirblock |
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339 | ; test eax, eax |
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340 | ;--------------------------------------------------------------- |
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341 | xfs_read_dirblock: |
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342 | ;mov eax, [esp + 4] |
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343 | ;mov edx, [esp + 8] |
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344 | ;DEBUGF 1,"read dirblock at: %d %d\n",edx,eax |
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345 | ;DEBUGF 1,"dirblklog: %d\n",[ebp + XFS.dirblklog] |
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346 | push ebx esi |
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347 | |||
348 | mov eax, [esp + 12] ; startblock_lo |
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349 | mov edx, [esp + 16] ; startblock_hi |
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350 | mov ebx, [esp + 20] ; buffer |
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351 | |||
352 | ; dirblock >= block |
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353 | ; read dirblocks by blocks |
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354 | |||
355 | mov ecx, [ebp + XFS.dirblklog] |
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356 | mov esi, 1 |
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357 | shl esi, cl |
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358 | .next_block: |
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359 | push eax edx |
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360 | call xfs_read_block |
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361 | mov ecx, eax |
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362 | pop edx eax |
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363 | test ecx, ecx |
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364 | jnz .error |
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365 | add eax, 1 ; be ready to fs_read64_sys |
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366 | adc edx, 0 |
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367 | add ebx, [ebp + XFS.blocksize] |
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368 | dec esi |
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369 | jnz .next_block |
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370 | |||
371 | .quit: |
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372 | xor eax, eax |
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373 | pop esi ebx |
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374 | ret 12 |
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375 | .error: |
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376 | mov eax, ecx |
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377 | pop esi ebx |
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378 | ret 12 |
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379 | |||
380 | |||
381 | ;--------------------------------------------------------------- |
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382 | ; push buffer |
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383 | ; push inode_hi |
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384 | ; push inode_lo |
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385 | ; call xfs_read_inode |
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386 | ; test eax, eax |
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387 | ;--------------------------------------------------------------- |
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388 | xfs_read_inode: |
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389 | ;DEBUGF 1,"reading inode: 0x%x%x\n",[esp+8],[esp+4] |
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390 | push ebx |
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391 | mov eax, [esp + 8] ; inode_lo |
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392 | mov edx, [esp + 12] ; inode_hi |
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393 | mov ebx, [esp + 16] ; buffer |
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394 | |||
395 | ; inodes are packed into blocks |
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396 | ; 1. calculate block number |
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397 | ; 2. read the block |
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398 | ; 3. add inode offset to block base address |
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399 | |||
400 | ; 1. |
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401 | mov ecx, [ebp + XFS.inodetoblocklog] |
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402 | shrd eax, edx, cl |
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403 | shr edx, cl |
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404 | ; 2. |
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405 | call xfs_read_block |
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406 | test eax, eax |
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407 | jnz .error |
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408 | |||
409 | ; note that inode numbers should be first extracted from bitfields using mask |
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410 | |||
411 | mov eax, [esp + 8] |
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412 | mov edx, 1 |
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413 | mov ecx, [ebp + XFS.inopblog] |
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414 | shl edx, cl |
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415 | dec edx ; get inode number mask |
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416 | and eax, edx ; apply mask |
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417 | mov ecx, [ebp + XFS.inodelog] |
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418 | shl eax, cl |
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419 | add ebx, eax |
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420 | |||
421 | cmp word[ebx], XFS_DINODE_MAGIC ; test signature |
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422 | jne .error |
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423 | .quit: |
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424 | xor eax, eax |
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425 | mov edx, ebx |
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426 | pop ebx |
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427 | ret 12 |
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428 | .error: |
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429 | movi eax, ERROR_FS_FAIL |
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430 | mov edx, ebx |
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431 | pop ebx |
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432 | ret 12 |
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433 | |||
434 | |||
435 | ;---------------------------------------------------------------- |
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436 | ; push encoding ; ASCII / UNICODE |
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437 | ; push src ; inode |
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438 | ; push dst ; bdfe |
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439 | ; push entries_to_read |
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440 | ; push start_number ; from 0 |
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441 | ;---------------------------------------------------------------- |
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442 | xfs_dir_get_bdfes: |
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443 | DEBUGF 1,"xfs_dir_get_bdfes: %d entries from %d\n",[esp+8],[esp+4] |
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444 | sub esp, 4 ; local vars |
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445 | push ecx edx esi edi |
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446 | |||
447 | mov ebx, [esp + 36] ; src |
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448 | mov edx, [esp + 32] ; dst |
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449 | mov ecx, [esp + 24] ; start_number |
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450 | |||
451 | ; define directory ondisk format and jump to corresponding label |
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452 | |||
453 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_LOCAL |
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454 | jne .not_shortdir |
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455 | jmp .shortdir |
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456 | .not_shortdir: |
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457 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
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458 | jne .not_blockdir |
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459 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
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460 | bswap eax |
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461 | cmp eax, 1 |
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462 | jne .not_blockdir |
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463 | jmp .blockdir |
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464 | .not_blockdir: |
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465 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
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466 | jne .not_leafdir |
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467 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
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468 | bswap eax |
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469 | cmp eax, 4 |
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470 | ja .not_leafdir |
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471 | jmp .leafdir |
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472 | .not_leafdir: |
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473 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
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474 | jne .not_nodedir |
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475 | jmp .nodedir |
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476 | .not_nodedir: |
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477 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_BTREE |
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478 | jne .not_btreedir |
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479 | jmp .btreedir |
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480 | .not_btreedir: |
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481 | movi eax, ERROR_FS_FAIL |
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482 | jmp .error |
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483 | |||
484 | ; short form directory (all the data fits into inode) |
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485 | .shortdir: |
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486 | ;DEBUGF 1,"shortdir\n", |
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487 | movzx eax, word[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.count] |
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488 | test al, al ; is count zero? |
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489 | jnz @f ; if not, use it (i8count must be zero then) |
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490 | shr eax, 8 ; use i8count |
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491 | @@: |
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492 | add eax, 1 ; '..' and '.' are implicit |
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493 | mov dword[edx + 0], 1 ; version |
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494 | mov [edx + 8], eax ; total entries |
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495 | sub eax, [esp + 24] ; start number |
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496 | cmp eax, [esp + 28] ; entries to read |
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497 | jbe @f |
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498 | mov eax, [esp + 28] |
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499 | @@: |
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500 | mov [esp + 28], eax |
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501 | mov [edx + 4], eax ; number of actually read entries |
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502 | mov [ebp + XFS.entries_read], eax |
||
503 | |||
504 | ; inode numbers are often saved as 4 bytes (iff they fit) |
||
505 | ; compute the length of inode numbers |
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506 | |||
507 | mov eax, 4 ; 4 by default |
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508 | cmp byte[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.i8count], 0 |
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509 | je @f |
||
510 | add eax, eax ; 4+4=8, iff i8count != 0 |
||
511 | @@: |
||
512 | mov dword[edx + 12], 0 ; reserved |
||
513 | mov dword[edx + 16], 0 ; |
||
514 | mov dword[edx + 20], 0 ; |
||
515 | mov dword[edx + 24], 0 ; |
||
516 | mov dword[edx + 28], 0 ; |
||
517 | add edx, 32 |
||
518 | lea esi, [ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.parent + eax] |
||
519 | dec ecx |
||
520 | js .shortdir.fill |
||
521 | |||
522 | ; skip some entries if the first entry to read is not 0 |
||
523 | |||
524 | .shortdir.skip: |
||
525 | test ecx, ecx |
||
526 | jz .shortdir.skipped |
||
527 | movzx edi, byte[esi + xfs_dir2_sf_entry.namelen] |
||
528 | lea esi, [esi + xfs_dir2_sf_entry.name + edi] |
||
529 | add esi, eax |
||
530 | dec ecx |
||
531 | jnz .shortdir.skip |
||
532 | mov ecx, [esp + 28] ; entries to read |
||
533 | jmp .shortdir.skipped |
||
534 | .shortdir.fill: |
||
535 | mov ecx, [esp + 28] ; total number |
||
536 | test ecx, ecx |
||
537 | jz .quit |
||
538 | push ecx |
||
539 | ;DEBUGF 1,"ecx: %d\n",ecx |
||
540 | lea edi, [edx + 40] ; get file name offset |
||
541 | ;DEBUGF 1,"filename: ..\n" |
||
542 | mov dword[edi], '..' |
||
543 | mov edi, edx |
||
544 | push eax ebx edx esi |
||
545 | 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] |
||
546 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
547 | ; test eax, eax |
||
548 | ; jnz .error |
||
549 | stdcall xfs_get_inode_info, edx, edi |
||
550 | test eax, eax |
||
551 | pop esi edx ebx eax |
||
552 | jnz .error |
||
553 | mov ecx, [esp + 44] ; file name encding |
||
554 | mov [edx + 4], ecx |
||
555 | add edx, 304 ; ASCII only for now |
||
556 | pop ecx |
||
557 | dec ecx |
||
558 | jz .quit |
||
559 | |||
560 | ; push ecx |
||
561 | ; lea edi, [edx + 40] |
||
562 | ;DEBUGF 1,"filename: .\n" |
||
563 | ; mov dword[edi], '.' |
||
564 | ; mov edi, edx |
||
565 | ; push eax edx |
||
566 | ; stdcall xfs_get_inode_info, [ebp + XFS.cur_inode], edi |
||
567 | ; test eax, eax |
||
568 | ; pop edx eax |
||
569 | ; jnz .error |
||
570 | ; mov ecx, [esp + 44] |
||
571 | ; mov [edx + 4], ecx |
||
572 | ; add edx, 304 ; ASCII only for now |
||
573 | ; pop ecx |
||
574 | ; dec ecx |
||
575 | ; jz .quit |
||
576 | |||
577 | ; we skipped some entries |
||
578 | ; now we fill min(required, present) number of bdfe's |
||
579 | |||
580 | .shortdir.skipped: |
||
581 | ;DEBUGF 1,"ecx: %d\n",ecx |
||
582 | push ecx |
||
583 | movzx ecx, byte[esi + xfs_dir2_sf_entry.namelen] |
||
584 | add esi, xfs_dir2_sf_entry.name |
||
585 | lea edi, [edx + 40] ; bdfe offset of file name |
||
586 | ;DEBUGF 1,"filename: |%s|\n",esi |
||
587 | rep movsb |
||
588 | mov word[edi], 0 ; terminator (ASCIIZ) |
||
589 | |||
590 | push eax ebx ecx edx esi |
||
591 | ; push edx ; for xfs_get_inode_info |
||
592 | mov edi, edx |
||
593 | stdcall xfs_get_inode_number_sf, dword[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.count], [esi + 4], [esi] |
||
594 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
595 | ; test eax, eax |
||
596 | ; jnz .error |
||
597 | stdcall xfs_get_inode_info, edx, edi |
||
598 | test eax, eax |
||
599 | pop esi edx ecx ebx eax |
||
600 | jnz .error |
||
601 | mov ecx, [esp + 44] ; file name encoding |
||
602 | mov [edx + 4], ecx |
||
603 | |||
604 | add edx, 304 ; ASCII only for now |
||
605 | add esi, eax |
||
606 | pop ecx |
||
607 | dec ecx |
||
608 | jnz .shortdir.skipped |
||
609 | jmp .quit |
||
610 | |||
611 | .blockdir: |
||
612 | ;DEBUGF 1,"blockdir\n" |
||
613 | push edx |
||
614 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
615 | stdcall xfs_extent_unpack, eax |
||
616 | ;DEBUGF 1,"extent.br_startoff : 0x%x%x\n",[ebp+XFS.extent.br_startoff+4],[ebp+XFS.extent.br_startoff+0] |
||
617 | ;DEBUGF 1,"extent.br_startblock: 0x%x%x\n",[ebp+XFS.extent.br_startblock+4],[ebp+XFS.extent.br_startblock+0] |
||
618 | ;DEBUGF 1,"extent.br_blockcount: %d\n",[ebp+XFS.extent.br_blockcount] |
||
619 | ;DEBUGF 1,"extent.br_state : %d\n",[ebp+XFS.extent.br_state] |
||
620 | stdcall xfs_read_dirblock, dword[ebp + XFS.extent.br_startblock + 0], dword[ebp + XFS.extent.br_startblock + 4], [ebp + XFS.cur_dirblock] |
||
621 | test eax, eax |
||
622 | pop edx |
||
623 | jnz .error |
||
624 | ;DEBUGF 1,"dirblock signature: %s\n",[ebp+XFS.cur_dirblock] |
||
625 | mov ebx, [ebp + XFS.cur_dirblock] |
||
626 | mov dword[edx + 0], 1 ; version |
||
627 | mov eax, [ebp + XFS.dirblocksize] |
||
628 | mov ecx, [ebx + eax - sizeof.xfs_dir2_block_tail + xfs_dir2_block_tail.stale] |
||
629 | mov eax, [ebx + eax - sizeof.xfs_dir2_block_tail + xfs_dir2_block_tail.count] |
||
630 | bswap ecx |
||
631 | bswap eax |
||
632 | sub eax, ecx ; actual number of entries = count - stale |
||
633 | mov [edx + 8], eax ; total entries |
||
634 | ;DEBUGF 1,"total entries: %d\n",eax |
||
635 | sub eax, [esp + 24] ; start number |
||
636 | cmp eax, [esp + 28] ; entries to read |
||
637 | jbe @f |
||
638 | mov eax, [esp + 28] |
||
639 | @@: |
||
640 | mov [esp + 28], eax |
||
641 | mov [edx + 4], eax ; number of actually read entries |
||
642 | mov [ebp + XFS.entries_read], eax |
||
643 | ;DEBUGF 1,"actually read entries: %d\n",eax |
||
644 | mov dword[edx + 12], 0 ; reserved |
||
645 | mov dword[edx + 16], 0 ; |
||
646 | mov dword[edx + 20], 0 ; |
||
647 | mov dword[edx + 24], 0 ; |
||
648 | mov dword[edx + 28], 0 ; |
||
649 | add ebx, xfs_dir2_block.u |
||
650 | |||
651 | mov ecx, [esp + 24] ; start entry number |
||
652 | ; also means how many to skip |
||
653 | test ecx, ecx |
||
654 | jz .blockdir.skipped |
||
655 | .blockdir.skip: |
||
656 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
657 | jne @f |
||
658 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
659 | xchg al, ah |
||
660 | add ebx, eax |
||
661 | jmp .blockdir.skip |
||
662 | @@: |
||
663 | movzx eax, [ebx + xfs_dir2_data_union.xentry.namelen] |
||
664 | lea ebx, [ebx + xfs_dir2_data_union.xentry.name + eax + 2] ; 2 bytes for 'tag' |
||
665 | add ebx, 7 ; align on 8 bytes |
||
666 | and ebx, not 7 |
||
667 | dec ecx |
||
668 | jnz .blockdir.skip |
||
669 | .blockdir.skipped: |
||
670 | mov ecx, [edx + 4] ; actually read entries |
||
671 | test ecx, ecx |
||
672 | jz .quit |
||
673 | add edx, 32 ; set edx to the first bdfe |
||
674 | .blockdir.next_entry: |
||
675 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_NULL |
||
676 | jne @f |
||
677 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
678 | xchg al, ah |
||
679 | add ebx, eax |
||
680 | jmp .blockdir.next_entry |
||
681 | @@: |
||
682 | push ecx |
||
683 | push eax ebx ecx edx esi |
||
684 | mov edi, edx |
||
685 | mov edx, dword[ebx + xfs_dir2_data_union.xentry.inumber + 0] |
||
686 | mov eax, dword[ebx + xfs_dir2_data_union.xentry.inumber + 4] |
||
687 | bswap edx |
||
688 | bswap eax |
||
689 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
690 | stdcall xfs_get_inode_info, edx, edi |
||
691 | test eax, eax |
||
692 | pop esi edx ecx ebx eax |
||
693 | jnz .error |
||
694 | mov ecx, [esp + 44] |
||
695 | mov [edx + 4], ecx |
||
696 | lea edi, [edx + 40] |
||
697 | movzx ecx, byte[ebx + xfs_dir2_data_union.xentry.namelen] |
||
698 | lea esi, [ebx + xfs_dir2_data_union.xentry.name] |
||
699 | ;DEBUGF 1,"filename: |%s|\n",esi |
||
700 | rep movsb |
||
701 | ; call utf8_to_cp866 |
||
702 | mov word[edi], 0 ; terminator |
||
703 | lea ebx, [esi + 2] ; skip 'tag' |
||
704 | add ebx, 7 ; xfs_dir2_data_entries are aligned to 8 bytes |
||
705 | and ebx, not 7 |
||
706 | add edx, 304 |
||
707 | pop ecx |
||
708 | dec ecx |
||
709 | jnz .blockdir.next_entry |
||
710 | jmp .quit |
||
711 | |||
712 | .leafdir: |
||
713 | ;DEBUGF 1,"readdir: leaf\n" |
||
714 | mov [ebp + XFS.cur_inode_save], ebx |
||
715 | push ebx ecx edx |
||
716 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
717 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
718 | bswap edx |
||
719 | stdcall xfs_extent_list_read_dirblock, eax, [ebp + XFS.dir2_leaf_offset_blocks], 0, edx, 0xffffffff, 0xffffffff |
||
720 | mov ecx, eax |
||
721 | and ecx, edx |
||
722 | inc ecx |
||
723 | pop edx ecx ebx |
||
724 | jz .error |
||
725 | |||
726 | mov eax, [ebp + XFS.cur_dirblock] |
||
727 | movzx ecx, word[eax + xfs_dir2_leaf.hdr.stale] |
||
728 | movzx eax, word[eax + xfs_dir2_leaf.hdr.count] |
||
729 | xchg cl, ch |
||
730 | xchg al, ah |
||
731 | sub eax, ecx |
||
732 | ;DEBUGF 1,"total count: %d\n",eax |
||
733 | |||
734 | mov dword[edx + 0], 1 ; version |
||
735 | mov [edx + 8], eax ; total entries |
||
736 | sub eax, [esp + 24] ; start number |
||
737 | cmp eax, [esp + 28] ; entries to read |
||
738 | jbe @f |
||
739 | mov eax, [esp + 28] |
||
740 | @@: |
||
741 | mov [esp + 28], eax |
||
742 | mov [edx + 4], eax ; number of actually read entries |
||
743 | |||
744 | mov dword[edx + 12], 0 ; reserved |
||
745 | mov dword[edx + 16], 0 ; |
||
746 | mov dword[edx + 20], 0 ; |
||
747 | mov dword[edx + 24], 0 ; |
||
748 | mov dword[edx + 28], 0 ; |
||
749 | |||
750 | mov eax, [ebp + XFS.cur_dirblock] |
||
751 | add eax, [ebp + XFS.dirblocksize] |
||
752 | mov [ebp + XFS.max_dirblockaddr], eax |
||
753 | mov dword[ebp + XFS.next_block_num + 0], 0 |
||
754 | mov dword[ebp + XFS.next_block_num + 4], 0 |
||
755 | |||
756 | mov ebx, [ebp + XFS.max_dirblockaddr] ; to read dirblock immediately |
||
757 | mov ecx, [esp + 24] ; start number |
||
758 | test ecx, ecx |
||
759 | jz .leafdir.skipped |
||
760 | .leafdir.skip: |
||
761 | cmp ebx, [ebp + XFS.max_dirblockaddr] |
||
762 | jne @f |
||
763 | push ecx edx |
||
764 | mov ebx, [ebp + XFS.cur_inode_save] |
||
765 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
766 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
767 | bswap edx |
||
768 | 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 |
||
769 | mov ecx, eax |
||
770 | and ecx, edx |
||
771 | inc ecx |
||
772 | jz .error |
||
773 | add eax, 1 |
||
774 | adc edx, 0 |
||
775 | mov dword[ebp + XFS.next_block_num + 0], eax |
||
776 | mov dword[ebp + XFS.next_block_num + 4], edx |
||
777 | mov ebx, [ebp + XFS.cur_dirblock] |
||
778 | add ebx, sizeof.xfs_dir2_data_hdr |
||
779 | pop edx ecx |
||
780 | @@: |
||
781 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
782 | jne @f |
||
783 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
784 | xchg al, ah |
||
785 | add ebx, eax |
||
786 | jmp .leafdir.skip |
||
787 | @@: |
||
788 | movzx eax, [ebx + xfs_dir2_data_union.xentry.namelen] |
||
789 | lea ebx, [ebx + xfs_dir2_data_union.xentry.name + eax + 2] ; 2 for 'tag' |
||
790 | add ebx, 7 |
||
791 | and ebx, not 7 |
||
792 | dec ecx |
||
793 | jnz .leafdir.skip |
||
794 | .leafdir.skipped: |
||
795 | mov [ebp + XFS.entries_read], 0 |
||
796 | mov ecx, [edx + 4] ; actually read entries |
||
797 | test ecx, ecx |
||
798 | jz .quit |
||
799 | add edx, 32 ; first bdfe entry |
||
800 | .leafdir.next_entry: |
||
801 | ;DEBUGF 1,"next_extry\n" |
||
802 | cmp ebx, [ebp + XFS.max_dirblockaddr] |
||
803 | jne .leafdir.process_current_block |
||
804 | push ecx edx |
||
805 | mov ebx, [ebp + XFS.cur_inode_save] |
||
806 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
807 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
808 | bswap edx |
||
809 | 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 |
||
810 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
811 | mov ecx, eax |
||
812 | and ecx, edx |
||
813 | inc ecx |
||
814 | jnz @f |
||
815 | pop edx ecx |
||
816 | jmp .quit |
||
817 | @@: |
||
818 | add eax, 1 |
||
819 | adc edx, 0 |
||
820 | mov dword[ebp + XFS.next_block_num + 0], eax |
||
821 | mov dword[ebp + XFS.next_block_num + 4], edx |
||
822 | mov ebx, [ebp + XFS.cur_dirblock] |
||
823 | add ebx, sizeof.xfs_dir2_data_hdr |
||
824 | pop edx ecx |
||
825 | .leafdir.process_current_block: |
||
826 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
827 | jne @f |
||
828 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
829 | xchg al, ah |
||
830 | add ebx, eax |
||
831 | jmp .leafdir.next_entry |
||
832 | @@: |
||
833 | push eax ebx ecx edx esi |
||
834 | mov edi, edx |
||
835 | mov edx, dword[ebx + xfs_dir2_data_union.xentry.inumber + 0] |
||
836 | mov eax, dword[ebx + xfs_dir2_data_union.xentry.inumber + 4] |
||
837 | bswap edx |
||
838 | bswap eax |
||
839 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
840 | stdcall xfs_get_inode_info, edx, edi |
||
841 | test eax, eax |
||
842 | pop esi edx ecx ebx eax |
||
843 | jnz .error |
||
844 | push ecx |
||
845 | mov ecx, [esp + 44] |
||
846 | mov [edx + 4], ecx |
||
847 | lea edi, [edx + 40] |
||
848 | movzx ecx, byte[ebx + xfs_dir2_data_union.xentry.namelen] |
||
849 | lea esi, [ebx + xfs_dir2_data_union.xentry.name] |
||
850 | ;DEBUGF 1,"filename: |%s|\n",esi |
||
851 | rep movsb |
||
852 | pop ecx |
||
853 | mov word[edi], 0 |
||
854 | lea ebx, [esi + 2] ; skip 'tag' |
||
855 | add ebx, 7 ; xfs_dir2_data_entries are aligned to 8 bytes |
||
856 | and ebx, not 7 |
||
857 | add edx, 304 ; ASCII only for now |
||
858 | inc [ebp + XFS.entries_read] |
||
859 | dec ecx |
||
860 | jnz .leafdir.next_entry |
||
861 | jmp .quit |
||
862 | |||
863 | .nodedir: |
||
864 | ;DEBUGF 1,"readdir: node\n" |
||
865 | push edx |
||
866 | mov [ebp + XFS.cur_inode_save], ebx |
||
867 | mov [ebp + XFS.entries_read], 0 |
||
868 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
869 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
870 | bswap edx |
||
871 | stdcall xfs_dir2_node_get_numfiles, eax, edx, [ebp + XFS.dir2_leaf_offset_blocks] |
||
872 | pop edx |
||
873 | test eax, eax |
||
874 | jnz .error |
||
875 | mov eax, [ebp + XFS.entries_read] |
||
876 | mov [ebp + XFS.entries_read], 0 |
||
877 | ;DEBUGF 1,"numfiles: %d\n",eax |
||
878 | mov dword[edx + 0], 1 ; version |
||
879 | mov [edx + 8], eax ; total entries |
||
880 | sub eax, [esp + 24] ; start number |
||
881 | cmp eax, [esp + 28] ; entries to read |
||
882 | jbe @f |
||
883 | mov eax, [esp + 28] |
||
884 | @@: |
||
885 | mov [esp + 28], eax |
||
886 | mov [edx + 4], eax ; number of actually read entries |
||
887 | |||
888 | mov dword[edx + 12], 0 ; reserved |
||
889 | mov dword[edx + 16], 0 ; |
||
890 | mov dword[edx + 20], 0 ; |
||
891 | mov dword[edx + 24], 0 ; |
||
892 | mov dword[edx + 28], 0 ; |
||
893 | |||
894 | mov eax, [ebp + XFS.cur_dirblock] |
||
895 | add eax, [ebp + XFS.dirblocksize] |
||
896 | mov [ebp + XFS.max_dirblockaddr], eax |
||
897 | mov dword[ebp + XFS.next_block_num + 0], 0 |
||
898 | mov dword[ebp + XFS.next_block_num + 4], 0 |
||
899 | |||
900 | mov ebx, [ebp + XFS.max_dirblockaddr] ; to read dirblock immediately |
||
901 | mov ecx, [esp + 24] ; start number |
||
902 | test ecx, ecx |
||
903 | jz .leafdir.skipped |
||
904 | jmp .leafdir.skip |
||
905 | |||
906 | .btreedir: |
||
907 | ;DEBUGF 1,"readdir: btree\n" |
||
908 | mov [ebp + XFS.cur_inode_save], ebx |
||
909 | push ebx edx |
||
910 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
||
911 | bswap eax |
||
912 | mov [ebp + XFS.ro_nextents], eax |
||
913 | mov eax, [ebp + XFS.inodesize] |
||
914 | sub eax, xfs_inode.di_u |
||
915 | sub eax, sizeof.xfs_bmdr_block |
||
916 | shr eax, 4 |
||
917 | ;DEBUGF 1,"maxnumresc: %d\n",eax |
||
918 | mov edx, dword[ebx + xfs_inode.di_u + sizeof.xfs_bmdr_block + sizeof.xfs_bmbt_key*eax + 0] |
||
919 | mov eax, dword[ebx + xfs_inode.di_u + sizeof.xfs_bmdr_block + sizeof.xfs_bmbt_key*eax + 4] |
||
920 | bswap eax |
||
921 | bswap edx |
||
922 | mov ebx, [ebp + XFS.cur_block] |
||
923 | ;DEBUGF 1,"read_block: %x %x ",edx,eax |
||
924 | stdcall xfs_read_block |
||
925 | pop edx ebx |
||
926 | test eax, eax |
||
927 | jnz .error |
||
928 | ;DEBUGF 1,"ok\n" |
||
929 | |||
930 | mov ebx, [ebp + XFS.cur_block] |
||
931 | push edx |
||
932 | mov [ebp + XFS.entries_read], 0 |
||
933 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
934 | mov edx, [ebp + XFS.ro_nextents] |
||
935 | stdcall xfs_dir2_node_get_numfiles, eax, edx, [ebp + XFS.dir2_leaf_offset_blocks] |
||
936 | pop edx |
||
937 | test eax, eax |
||
938 | jnz .error |
||
939 | mov eax, [ebp + XFS.entries_read] |
||
940 | mov [ebp + XFS.entries_read], 0 |
||
941 | ;DEBUGF 1,"numfiles: %d\n",eax |
||
942 | |||
943 | mov dword[edx + 0], 1 ; version |
||
944 | mov [edx + 8], eax ; total entries |
||
945 | sub eax, [esp + 24] ; start number |
||
946 | cmp eax, [esp + 28] ; entries to read |
||
947 | jbe @f |
||
948 | mov eax, [esp + 28] |
||
949 | @@: |
||
950 | mov [esp + 28], eax |
||
951 | mov [edx + 4], eax ; number of actually read entries |
||
952 | |||
953 | mov dword[edx + 12], 0 |
||
954 | mov dword[edx + 16], 0 |
||
955 | mov dword[edx + 20], 0 |
||
956 | mov dword[edx + 24], 0 |
||
957 | mov dword[edx + 28], 0 |
||
958 | |||
959 | mov eax, [ebp + XFS.cur_dirblock] ; fsblock? |
||
960 | add eax, [ebp + XFS.dirblocksize] |
||
961 | mov [ebp + XFS.max_dirblockaddr], eax |
||
962 | mov dword[ebp + XFS.next_block_num + 0], 0 |
||
963 | mov dword[ebp + XFS.next_block_num + 4], 0 |
||
964 | |||
965 | mov ebx, [ebp + XFS.max_dirblockaddr] ; to read dirblock immediately |
||
966 | mov ecx, [esp + 24] ; start number |
||
967 | test ecx, ecx |
||
968 | jz .btreedir.skipped |
||
969 | ; jmp .btreedir.skip |
||
970 | .btreedir.skip: |
||
971 | cmp ebx, [ebp + XFS.max_dirblockaddr] |
||
972 | jne @f |
||
973 | push ecx edx |
||
974 | mov ebx, [ebp + XFS.cur_block] |
||
975 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
976 | mov edx, [ebp + XFS.ro_nextents] |
||
977 | 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 |
||
978 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
979 | mov ecx, eax |
||
980 | and ecx, edx |
||
981 | inc ecx |
||
982 | jz .error |
||
983 | add eax, 1 |
||
984 | adc edx, 0 |
||
985 | mov dword[ebp + XFS.next_block_num + 0], eax |
||
986 | mov dword[ebp + XFS.next_block_num + 4], edx |
||
987 | mov ebx, [ebp + XFS.cur_dirblock] |
||
988 | add ebx, sizeof.xfs_dir2_data_hdr |
||
989 | pop edx ecx |
||
990 | @@: |
||
991 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
992 | jne @f |
||
993 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
994 | xchg al, ah |
||
995 | add ebx, eax |
||
996 | jmp .btreedir.skip |
||
997 | @@: |
||
998 | movzx eax, [ebx + xfs_dir2_data_union.xentry.namelen] |
||
999 | lea ebx, [ebx + xfs_dir2_data_union.xentry.name + eax + 2] ; 2 for 'tag' |
||
1000 | add ebx, 7 |
||
1001 | and ebx, not 7 |
||
1002 | dec ecx |
||
1003 | jnz .btreedir.skip |
||
1004 | .btreedir.skipped: |
||
1005 | mov [ebp + XFS.entries_read], 0 |
||
1006 | mov ecx, [edx + 4] ; actually read entries |
||
1007 | test ecx, ecx |
||
1008 | jz .quit |
||
1009 | add edx, 32 |
||
1010 | .btreedir.next_entry: |
||
1011 | ;mov eax, [ebp + XFS.entries_read] |
||
1012 | ;DEBUGF 1,"next_extry: %d\n",eax |
||
1013 | cmp ebx, [ebp + XFS.max_dirblockaddr] |
||
1014 | jne .btreedir.process_current_block |
||
1015 | push ecx edx |
||
1016 | mov ebx, [ebp + XFS.cur_block] |
||
1017 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
1018 | mov edx, [ebp + XFS.ro_nextents] |
||
1019 | 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 |
||
1020 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1021 | mov ecx, eax |
||
1022 | and ecx, edx |
||
1023 | inc ecx |
||
1024 | jnz @f |
||
1025 | pop edx ecx |
||
1026 | jmp .quit |
||
1027 | @@: |
||
1028 | add eax, 1 |
||
1029 | adc edx, 0 |
||
1030 | mov dword[ebp + XFS.next_block_num + 0], eax |
||
1031 | mov dword[ebp + XFS.next_block_num + 4], edx |
||
1032 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1033 | add ebx, sizeof.xfs_dir2_data_hdr |
||
1034 | pop edx ecx |
||
1035 | .btreedir.process_current_block: |
||
1036 | cmp word[ebx + xfs_dir2_data_union.unused.freetag], XFS_DIR2_DATA_FREE_TAG |
||
1037 | jne @f |
||
1038 | movzx eax, word[ebx + xfs_dir2_data_union.unused.length] |
||
1039 | xchg al, ah |
||
1040 | add ebx, eax |
||
1041 | jmp .btreedir.next_entry |
||
1042 | @@: |
||
1043 | push eax ebx ecx edx esi |
||
1044 | mov edi, edx |
||
1045 | mov edx, dword[ebx + xfs_dir2_data_union.xentry.inumber + 0] |
||
1046 | mov eax, dword[ebx + xfs_dir2_data_union.xentry.inumber + 4] |
||
1047 | bswap edx |
||
1048 | bswap eax |
||
1049 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.tmp_inode] |
||
1050 | stdcall xfs_get_inode_info, edx, edi |
||
1051 | test eax, eax |
||
1052 | pop esi edx ecx ebx eax |
||
1053 | jnz .error |
||
1054 | push ecx |
||
1055 | mov ecx, [esp + 44] |
||
1056 | mov [edx + 4], ecx |
||
1057 | lea edi, [edx + 40] |
||
1058 | movzx ecx, byte[ebx + xfs_dir2_data_union.xentry.namelen] |
||
1059 | lea esi, [ebx + xfs_dir2_data_union.xentry.name] |
||
1060 | ;DEBUGF 1,"filename: |%s|\n",esi |
||
1061 | rep movsb |
||
1062 | pop ecx |
||
1063 | mov word[edi], 0 |
||
1064 | lea ebx, [esi + 2] ; skip 'tag' |
||
1065 | add ebx, 7 ; xfs_dir2_data_entries are aligned to 8 bytes |
||
1066 | and ebx, not 7 |
||
1067 | add edx, 304 |
||
1068 | inc [ebp + XFS.entries_read] |
||
1069 | dec ecx |
||
1070 | jnz .btreedir.next_entry |
||
1071 | jmp .quit |
||
1072 | |||
1073 | |||
1074 | .quit: |
||
1075 | pop edi esi edx ecx |
||
1076 | add esp, 4 ; pop vars |
||
1077 | xor eax, eax |
||
1078 | ; mov ebx, [esp + 8] |
||
1079 | mov ebx, [ebp + XFS.entries_read] |
||
1080 | DEBUGF 1,"xfs_dir_get_bdfes done: %d\n",ebx |
||
1081 | ret 20 |
||
1082 | .error: |
||
1083 | pop edi esi edx ecx |
||
1084 | add esp, 4 ; pop vars |
||
1085 | mov eax, ERROR_FS_FAIL |
||
1086 | movi ebx, -1 |
||
1087 | ret 20 |
||
1088 | |||
1089 | |||
1090 | ;---------------------------------------------------------------- |
||
1091 | ; push inode_hi |
||
1092 | ; push inode_lo |
||
1093 | ; push name |
||
1094 | ;---------------------------------------------------------------- |
||
1095 | xfs_get_inode_short: |
||
1096 | ; this function searches for the file in _current_ dir |
||
1097 | ; it is called recursively for all the subdirs /path/to/my/file |
||
1098 | |||
1099 | ;DEBUGF 1,"xfs_get_inode_short: %s\n",[esp+4] |
||
1100 | mov esi, [esp + 4] ; name |
||
1101 | movzx eax, word[esi] |
||
1102 | cmp eax, '.' ; current dir; it is already read, just return |
||
1103 | je .quit |
||
1104 | cmp eax, './' ; same thing |
||
1105 | je .quit |
||
1106 | |||
1107 | ; read inode |
||
1108 | |||
1109 | mov eax, [esp + 8] ; inode_lo |
||
1110 | mov edx, [esp + 12] ; inode_hi |
||
1111 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.cur_inode] |
||
1112 | test eax, eax |
||
1113 | movi eax, ERROR_FS_FAIL |
||
1114 | jnz .error |
||
1115 | |||
1116 | ; find file name in directory |
||
1117 | ; switch directory ondisk format |
||
1118 | |||
1119 | mov ebx, edx |
||
1120 | mov [ebp + XFS.cur_inode_save], ebx |
||
1121 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_LOCAL |
||
1122 | jne .not_shortdir |
||
1123 | ;DEBUGF 1,"dir: shortdir\n" |
||
1124 | jmp .shortdir |
||
1125 | .not_shortdir: |
||
1126 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
||
1127 | jne .not_blockdir |
||
1128 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
||
1129 | bswap eax |
||
1130 | cmp eax, 1 |
||
1131 | jne .not_blockdir |
||
1132 | jmp .blockdir |
||
1133 | .not_blockdir: |
||
1134 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
||
1135 | jne .not_leafdir |
||
1136 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
||
1137 | bswap eax |
||
1138 | cmp eax, 4 |
||
1139 | ja .not_leafdir |
||
1140 | jmp .leafdir |
||
1141 | .not_leafdir: |
||
1142 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
||
1143 | jne .not_nodedir |
||
1144 | jmp .nodedir |
||
1145 | .not_nodedir: |
||
1146 | cmp byte[ebx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_BTREE |
||
1147 | jne .not_btreedir |
||
1148 | jmp .btreedir |
||
1149 | .not_btreedir: |
||
1150 | DEBUGF 1,"NOT IMPLEMENTED: DIR FORMAT\n" |
||
1151 | jmp .error |
||
1152 | |||
1153 | .shortdir: |
||
1154 | .shortdir.check_parent: |
||
1155 | ; parent inode number in shortform directories is always implicit, check this case |
||
1156 | mov eax, [esi] |
||
1157 | and eax, 0x00ffffff |
||
1158 | cmp eax, '..' |
||
1159 | je .shortdir.parent2 |
||
1160 | cmp eax, '../' |
||
1161 | je .shortdir.parent3 |
||
1162 | jmp .shortdir.common |
||
1163 | .shortdir.parent3: |
||
1164 | inc esi |
||
1165 | .shortdir.parent2: |
||
1166 | add esi, 2 |
||
1167 | add ebx, xfs_inode.di_u |
||
1168 | 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] |
||
1169 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1170 | jmp .quit |
||
1171 | |||
1172 | ; not a parent inode? |
||
1173 | ; search in the list, all the other files are stored uniformly |
||
1174 | |||
1175 | .shortdir.common: |
||
1176 | mov eax, 4 |
||
1177 | movzx edx, word[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.count] ; read count (byte) and i8count (byte) at once |
||
1178 | test dl, dl ; is count zero? |
||
1179 | jnz @f |
||
1180 | shr edx, 8 ; use i8count |
||
1181 | add eax, eax ; inode_num size |
||
1182 | @@: |
||
1183 | lea edi, [ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.parent + eax] |
||
1184 | |||
1185 | .next_name: |
||
1186 | movzx ecx, byte[edi + xfs_dir2_sf_entry.namelen] |
||
1187 | add edi, xfs_dir2_sf_entry.name |
||
1188 | mov esi, [esp + 4] |
||
1189 | ;DEBUGF 1,"esi: %s\n",esi |
||
1190 | ;DEBUGF 1,"edi: %s\n",edi |
||
1191 | repe cmpsb |
||
1192 | jne @f |
||
1193 | cmp byte[esi], 0 ; HINT: use adc here? |
||
1194 | je .found |
||
1195 | cmp byte[esi], '/' |
||
1196 | je .found_inc |
||
1197 | @@: |
||
1198 | add edi, ecx |
||
1199 | add edi, eax |
||
1200 | dec edx |
||
1201 | jnz .next_name |
||
1202 | movi eax, ERROR_FILE_NOT_FOUND |
||
1203 | jmp .error |
||
1204 | .found_inc: ; increment esi to skip '/' symbol |
||
1205 | ; this means esi always points to valid file name or zero terminator byte |
||
1206 | inc esi |
||
1207 | .found: |
||
1208 | stdcall xfs_get_inode_number_sf, dword[ebx + xfs_inode.di_u + xfs_dir2_sf_hdr.count], [edi + 4], [edi] |
||
1209 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1210 | jmp .quit |
||
1211 | |||
1212 | .blockdir: |
||
1213 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1214 | stdcall xfs_extent_unpack, eax |
||
1215 | stdcall xfs_read_dirblock, dword[ebp + XFS.extent.br_startblock + 0], dword[ebp + XFS.extent.br_startblock + 4], [ebp + XFS.cur_dirblock] |
||
1216 | test eax, eax |
||
1217 | jnz .error |
||
1218 | ;DEBUGF 1,"dirblock signature: %s\n",[ebp+XFS.cur_dirblock] |
||
1219 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1220 | mov eax, [ebp + XFS.dirblocksize] |
||
1221 | mov eax, [ebx + eax - sizeof.xfs_dir2_block_tail + xfs_dir2_block_tail.count] |
||
1222 | ; note that we don't subtract xfs_dir2_block_tail.stale here, |
||
1223 | ; since we need the number of leaf entries rather than file number |
||
1224 | bswap eax |
||
1225 | add ebx, [ebp + XFS.dirblocksize] |
||
1226 | ; mov ecx, sizeof.xfs_dir2_leaf_entry |
||
1227 | imul ecx, eax, sizeof.xfs_dir2_leaf_entry |
||
1228 | sub ebx, sizeof.xfs_dir2_block_tail |
||
1229 | sub ebx, ecx |
||
1230 | shr ecx, 3 |
||
1231 | push ecx ; for xfs_get_inode_by_hash |
||
1232 | push ebx ; for xfs_get_inode_by_hash |
||
1233 | |||
1234 | mov edi, esi |
||
1235 | xor eax, eax |
||
1236 | mov ecx, 4096 ; MAX_PATH_LEN |
||
1237 | repne scasb |
||
1238 | movi eax, ERROR_FS_FAIL |
||
1239 | jne .error |
||
1240 | neg ecx |
||
1241 | add ecx, 4096 ; MAX_PATH_LEN |
||
1242 | dec ecx |
||
1243 | mov edx, ecx |
||
1244 | ;DEBUGF 1,"strlen total : %d\n",edx |
||
1245 | mov edi, esi |
||
1246 | mov eax, '/' |
||
1247 | mov ecx, edx |
||
1248 | repne scasb |
||
1249 | jne @f |
||
1250 | inc ecx |
||
1251 | @@: |
||
1252 | neg ecx |
||
1253 | add ecx, edx |
||
1254 | ;DEBUGF 1,"strlen current: %d\n",ecx |
||
1255 | stdcall xfs_hashname, esi, ecx |
||
1256 | add esi, ecx |
||
1257 | cmp byte[esi], '/' |
||
1258 | jne @f |
||
1259 | inc esi |
||
1260 | @@: |
||
1261 | ;DEBUGF 1,"hashed: 0x%x\n",eax |
||
1262 | ; bswap eax |
||
1263 | stdcall xfs_get_addr_by_hash |
||
1264 | bswap eax |
||
1265 | ;DEBUGF 1,"got address: 0x%x\n",eax |
||
1266 | cmp eax, -1 |
||
1267 | jne @f |
||
1268 | movi eax, ERROR_FILE_NOT_FOUND |
||
1269 | mov ebx, -1 |
||
1270 | jmp .error |
||
1271 | @@: |
||
1272 | shl eax, 3 |
||
1273 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1274 | add ebx, eax |
||
1275 | mov edx, [ebx + 0] |
||
1276 | mov eax, [ebx + 4] |
||
1277 | bswap edx |
||
1278 | bswap eax |
||
1279 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1280 | jmp .quit |
||
1281 | |||
1282 | .leafdir: |
||
1283 | ;DEBUGF 1,"dirblock signature: %s\n",[ebp+XFS.cur_dirblock] |
||
1284 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1285 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
1286 | bswap edx |
||
1287 | stdcall xfs_extent_list_read_dirblock, eax, [ebp + XFS.dir2_leaf_offset_blocks], 0, edx, -1, -1 |
||
1288 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1289 | mov ecx, eax |
||
1290 | and ecx, edx |
||
1291 | inc ecx |
||
1292 | jz .error |
||
1293 | |||
1294 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1295 | movzx eax, [ebx + xfs_dir2_leaf.hdr.count] |
||
1296 | ; note that we don't subtract xfs_dir2_leaf.hdr.stale here, |
||
1297 | ; since we need the number of leaf entries rather than file number |
||
1298 | xchg al, ah |
||
1299 | add ebx, xfs_dir2_leaf.ents |
||
1300 | ; imul ecx, eax, sizeof.xfs_dir2_leaf_entry |
||
1301 | ; shr ecx, 3 |
||
1302 | push eax ; for xfs_get_addr_by_hash: len |
||
1303 | push ebx ; for xfs_get_addr_by_hash: base |
||
1304 | |||
1305 | mov edi, esi |
||
1306 | xor eax, eax |
||
1307 | mov ecx, 4096 ; MAX_PATH_LEN |
||
1308 | repne scasb |
||
1309 | movi eax, ERROR_FS_FAIL |
||
1310 | jne .error |
||
1311 | neg ecx |
||
1312 | add ecx, 4096 |
||
1313 | dec ecx |
||
1314 | mov edx, ecx |
||
1315 | ;DEBUGF 1,"strlen total : %d\n",edx |
||
1316 | mov edi, esi |
||
1317 | mov eax, '/' |
||
1318 | mov ecx, edx |
||
1319 | repne scasb |
||
1320 | jne @f |
||
1321 | inc ecx |
||
1322 | @@: |
||
1323 | neg ecx |
||
1324 | add ecx, edx |
||
1325 | ;DEBUGF 1,"strlen current: %d\n",ecx |
||
1326 | stdcall xfs_hashname, esi, ecx |
||
1327 | add esi, ecx |
||
1328 | cmp byte[esi], '/' |
||
1329 | jne @f |
||
1330 | inc esi |
||
1331 | @@: |
||
1332 | ;DEBUGF 1,"hashed: 0x%x\n",eax |
||
1333 | stdcall xfs_get_addr_by_hash |
||
1334 | bswap eax |
||
1335 | ;DEBUGF 1,"got address: 0x%x\n",eax |
||
1336 | cmp eax, -1 |
||
1337 | jne @f |
||
1338 | movi eax, ERROR_FILE_NOT_FOUND |
||
1339 | mov ebx, -1 |
||
1340 | jmp .error |
||
1341 | @@: |
||
1342 | |||
1343 | mov ebx, [ebp + XFS.cur_inode_save] |
||
1344 | push esi edi |
||
1345 | xor edi, edi |
||
1346 | mov esi, eax |
||
1347 | shld edi, esi, 3 ; get offset |
||
1348 | shl esi, 3 ; 2^3 = 8 byte align |
||
1349 | mov edx, esi |
||
1350 | mov ecx, [ebp + XFS.dirblklog] |
||
1351 | add ecx, [ebp + XFS.blocklog] |
||
1352 | mov eax, 1 |
||
1353 | shl eax, cl |
||
1354 | dec eax |
||
1355 | and edx, eax |
||
1356 | push edx |
||
1357 | shrd esi, edi, cl |
||
1358 | shr edi, cl |
||
1359 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1360 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
1361 | bswap edx |
||
1362 | stdcall xfs_extent_list_read_dirblock, eax, esi, edi, edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
1363 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1364 | pop edx |
||
1365 | pop edi esi |
||
1366 | mov ecx, eax |
||
1367 | and ecx, edx |
||
1368 | inc ecx |
||
1369 | jz .error |
||
1370 | |||
1371 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1372 | add ebx, edx |
||
1373 | mov edx, [ebx + 0] |
||
1374 | mov eax, [ebx + 4] |
||
1375 | bswap edx |
||
1376 | bswap eax |
||
1377 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1378 | jmp .quit |
||
1379 | |||
1380 | .nodedir: |
||
1381 | ;DEBUGF 1,"lookupdir: node\n" |
||
1382 | mov [ebp + XFS.cur_inode_save], ebx |
||
1383 | |||
1384 | mov edi, esi |
||
1385 | xor eax, eax |
||
1386 | mov ecx, 4096 ; MAX_PATH_LEN |
||
1387 | repne scasb |
||
1388 | movi eax, ERROR_FS_FAIL |
||
1389 | jne .error |
||
1390 | neg ecx |
||
1391 | add ecx, 4096 ; MAX_PATH_LEN |
||
1392 | dec ecx |
||
1393 | mov edx, ecx |
||
1394 | ;DEBUGF 1,"strlen total : %d\n",edx |
||
1395 | mov edi, esi |
||
1396 | mov eax, '/' |
||
1397 | mov ecx, edx |
||
1398 | repne scasb |
||
1399 | jne @f |
||
1400 | inc ecx |
||
1401 | @@: |
||
1402 | neg ecx |
||
1403 | add ecx, edx |
||
1404 | ;DEBUGF 1,"strlen current: %d\n",ecx |
||
1405 | stdcall xfs_hashname, esi, ecx |
||
1406 | add esi, ecx |
||
1407 | cmp byte[esi], '/' |
||
1408 | jne @f |
||
1409 | inc esi |
||
1410 | @@: |
||
1411 | ;DEBUGF 1,"hashed: 0x%x\n",eax |
||
1412 | push edi edx |
||
1413 | mov edi, eax |
||
1414 | mov [ebp + XFS.entries_read], 0 |
||
1415 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1416 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
1417 | bswap edx |
||
1418 | stdcall xfs_dir2_lookupdir_node, eax, edx, [ebp + XFS.dir2_leaf_offset_blocks], edi |
||
1419 | pop edx edi |
||
1420 | test eax, eax |
||
1421 | jnz .error |
||
1422 | bswap ecx |
||
1423 | ;DEBUGF 1,"got address: 0x%x\n",ecx |
||
1424 | |||
1425 | mov ebx, [ebp + XFS.cur_inode_save] |
||
1426 | push esi edi |
||
1427 | xor edi, edi |
||
1428 | mov esi, ecx |
||
1429 | shld edi, esi, 3 ; get offset |
||
1430 | shl esi, 3 ; 8 byte align |
||
1431 | mov edx, esi |
||
1432 | mov ecx, [ebp + XFS.dirblklog] |
||
1433 | add ecx, [ebp + XFS.blocklog] |
||
1434 | mov eax, 1 |
||
1435 | shl eax, cl |
||
1436 | dec eax |
||
1437 | and edx, eax |
||
1438 | push edx |
||
1439 | shrd esi, edi, cl |
||
1440 | shr edi, cl |
||
1441 | lea eax, [ebx + xfs_inode.di_u + xfs_bmbt_rec.l0] |
||
1442 | mov edx, [ebx + xfs_inode.di_core.di_nextents] |
||
1443 | bswap edx |
||
1444 | stdcall xfs_extent_list_read_dirblock, eax, esi, edi, edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
1445 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1446 | pop edx |
||
1447 | pop edi esi |
||
1448 | mov ecx, eax |
||
1449 | and ecx, edx |
||
1450 | inc ecx |
||
1451 | jz .error |
||
1452 | |||
1453 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1454 | add ebx, edx |
||
1455 | mov edx, [ebx + 0] |
||
1456 | mov eax, [ebx + 4] |
||
1457 | bswap edx |
||
1458 | bswap eax |
||
1459 | ;DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1460 | jmp .quit |
||
1461 | |||
1462 | .btreedir: |
||
1463 | DEBUGF 1,"lookupdir: btree\n" |
||
1464 | mov [ebp + XFS.cur_inode_save], ebx |
||
1465 | |||
1466 | push ebx edx |
||
1467 | mov eax, [ebx + xfs_inode.di_core.di_nextents] |
||
1468 | bswap eax |
||
1469 | mov [ebp + XFS.ro_nextents], eax |
||
1470 | mov eax, [ebp + XFS.inodesize] |
||
1471 | sub eax, xfs_inode.di_u |
||
1472 | sub eax, sizeof.xfs_bmdr_block |
||
1473 | shr eax, 4 ; FIXME forkoff |
||
1474 | ;DEBUGF 1,"maxnumresc: %d\n",eax |
||
1475 | mov edx, dword[ebx + xfs_inode.di_u + sizeof.xfs_bmdr_block + sizeof.xfs_bmbt_key*eax + 0] |
||
1476 | mov eax, dword[ebx + xfs_inode.di_u + sizeof.xfs_bmdr_block + sizeof.xfs_bmbt_key*eax + 4] |
||
1477 | bswap eax |
||
1478 | bswap edx |
||
1479 | mov ebx, [ebp + XFS.cur_block] |
||
1480 | ;DEBUGF 1,"read_block: %x %x ",edx,eax |
||
1481 | stdcall xfs_read_block |
||
1482 | pop edx ebx |
||
1483 | test eax, eax |
||
1484 | jnz .error |
||
1485 | ;DEBUGF 1,"ok\n" |
||
1486 | mov ebx, [ebp + XFS.cur_block] |
||
1487 | |||
1488 | mov edi, esi |
||
1489 | xor eax, eax |
||
1490 | mov ecx, 4096 ; MAX_PATH_LEN |
||
1491 | repne scasb |
||
1492 | movi eax, ERROR_FS_FAIL |
||
1493 | jne .error |
||
1494 | neg ecx |
||
1495 | add ecx, 4096 |
||
1496 | dec ecx |
||
1497 | mov edx, ecx |
||
1498 | DEBUGF 1,"strlen total : %d\n",edx |
||
1499 | mov edi, esi |
||
1500 | mov eax, '/' |
||
1501 | mov ecx, edx |
||
1502 | repne scasb |
||
1503 | jne @f |
||
1504 | inc ecx |
||
1505 | @@: |
||
1506 | neg ecx |
||
1507 | add ecx, edx |
||
1508 | DEBUGF 1,"strlen current: %d\n",ecx |
||
1509 | stdcall xfs_hashname, esi, ecx |
||
1510 | add esi, ecx |
||
1511 | cmp byte[esi], '/' |
||
1512 | jne @f |
||
1513 | inc esi |
||
1514 | @@: |
||
1515 | DEBUGF 1,"hashed: 0x%x\n",eax |
||
1516 | push edi edx |
||
1517 | mov edi, eax |
||
1518 | mov [ebp + XFS.entries_read], 0 |
||
1519 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
1520 | mov edx, [ebp + XFS.ro_nextents] |
||
1521 | ;push eax |
||
1522 | ;mov eax, [ebp + XFS.dir2_leaf_offset_blocks] |
||
1523 | ;DEBUGF 1,": 0x%x %d\n",eax,eax |
||
1524 | ;pop eax |
||
1525 | stdcall xfs_dir2_lookupdir_node, eax, edx, [ebp + XFS.dir2_leaf_offset_blocks], edi |
||
1526 | pop edx edi |
||
1527 | test eax, eax |
||
1528 | jnz .error |
||
1529 | bswap ecx |
||
1530 | DEBUGF 1,"got address: 0x%x\n",ecx |
||
1531 | |||
1532 | mov ebx, [ebp + XFS.cur_block] |
||
1533 | push esi edi |
||
1534 | xor edi, edi |
||
1535 | mov esi, ecx |
||
1536 | shld edi, esi, 3 ; get offset |
||
1537 | shl esi, 3 |
||
1538 | mov edx, esi |
||
1539 | mov ecx, [ebp + XFS.dirblklog] |
||
1540 | add ecx, [ebp + XFS.blocklog] |
||
1541 | mov eax, 1 |
||
1542 | shl eax, cl |
||
1543 | dec eax |
||
1544 | and edx, eax |
||
1545 | push edx |
||
1546 | shrd esi, edi, cl |
||
1547 | shr edi, cl |
||
1548 | lea eax, [ebx + sizeof.xfs_bmbt_block] |
||
1549 | mov edx, [ebp + XFS.ro_nextents] |
||
1550 | stdcall xfs_extent_list_read_dirblock, eax, esi, edi, edx, [ebp + XFS.dir2_leaf_offset_blocks], 0 |
||
1551 | ;DEBUGF 1,"RETVALUE: %d %d\n",edx,eax |
||
1552 | pop edx |
||
1553 | pop edi esi |
||
1554 | mov ecx, eax |
||
1555 | and ecx, edx |
||
1556 | inc ecx |
||
1557 | jz .error |
||
1558 | |||
1559 | mov ebx, [ebp + XFS.cur_dirblock] |
||
1560 | add ebx, edx |
||
1561 | mov edx, [ebx + 0] |
||
1562 | mov eax, [ebx + 4] |
||
1563 | bswap edx |
||
1564 | bswap eax |
||
1565 | DEBUGF 1,"found inode: 0x%x%x\n",edx,eax |
||
1566 | jmp .quit |
||
1567 | |||
1568 | .quit: |
||
1569 | ret 12 |
||
1570 | .error: |
||
1571 | xor eax, eax |
||
1572 | mov edx, eax |
||
1573 | ret 12 |
||
1574 | |||
1575 | |||
1576 | ;---------------------------------------------------------------- |
||
1577 | ; push name |
||
1578 | ; call xfs_get_inode |
||
1579 | ; test eax, eax |
||
1580 | ;---------------------------------------------------------------- |
||
1581 | xfs_get_inode: |
||
1582 | ; call xfs_get_inode_short until file is found / error returned |
||
1583 | |||
1584 | ;DEBUGF 1,"getting inode of: %s\n",[esp+4] |
||
1585 | push ebx esi edi |
||
1586 | |||
1587 | ; start from the root inode |
||
1588 | |||
1589 | mov edx, dword[ebp + XFS.rootino + 4] ; hi |
||
1590 | mov eax, dword[ebp + XFS.rootino + 0] ; lo |
||
1591 | mov esi, [esp + 16] ; name |
||
1592 | |||
1593 | .next_dir: |
||
1594 | cmp byte[esi], 0 |
||
1595 | je .found |
||
1596 | |||
1597 | ;DEBUGF 1,"next_level: |%s|\n",esi |
||
1598 | stdcall xfs_get_inode_short, esi, eax, edx |
||
1599 | test edx, edx |
||
1600 | jnz @f |
||
1601 | test eax, eax |
||
1602 | jz .error |
||
1603 | @@: |
||
1604 | jmp .next_dir ; file name found, go to next directory level |
||
1605 | |||
1606 | .found: |
||
1607 | |||
1608 | .quit: |
||
1609 | pop edi esi ebx |
||
1610 | ret 4 |
||
1611 | .error: |
||
1612 | pop edi esi ebx |
||
1613 | xor eax, eax |
||
1614 | mov edx, eax |
||
1615 | ret 4 |
||
1616 | |||
1617 | |||
1618 | ;---------------------------------------------------------------- |
||
1619 | ; xfs_ReadFolder - XFS implementation of reading a folder |
||
1620 | ; in: ebp = pointer to XFS structure |
||
1621 | ; in: esi+[esp+4] = name |
||
1622 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1623 | ; out: eax, ebx = return values for sysfunc 70 |
||
1624 | ;---------------------------------------------------------------- |
||
1625 | xfs_ReadFolder: |
||
1626 | |||
1627 | ; to read folder |
||
1628 | ; 1. lock partition |
||
1629 | ; 2. find inode number |
||
1630 | ; 3. read this inode |
||
1631 | ; 4. get bdfe's |
||
1632 | ; 5. unlock partition |
||
1633 | |||
1634 | ; 1. |
||
1635 | call xfs_lock |
||
1636 | push ecx edx esi edi |
||
1637 | |||
1638 | ; 2. |
||
1639 | push ebx esi edi |
||
1640 | add esi, [esp + 32] ; directory name |
||
1641 | ;DEBUGF 1,"xfs_ReadFolder: |%s|\n",esi |
||
1642 | stdcall xfs_get_inode, esi |
||
1643 | pop edi esi ebx |
||
1644 | mov ecx, edx |
||
1645 | or ecx, eax |
||
1646 | jnz @f |
||
1647 | movi eax, ERROR_FILE_NOT_FOUND |
||
1648 | @@: |
||
1649 | |||
1650 | ; 3. |
||
1651 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.cur_inode] |
||
1652 | test eax, eax |
||
1653 | movi eax, ERROR_FS_FAIL |
||
1654 | jnz .error |
||
1655 | |||
1656 | ; 4. |
||
1657 | mov eax, [ebx + 8] ; encoding |
||
1658 | and eax, 1 |
||
1659 | stdcall xfs_dir_get_bdfes, [ebx + 4], [ebx + 12], [ebx + 16], edx, eax |
||
1660 | test eax, eax |
||
1661 | jnz .error |
||
1662 | |||
1663 | .quit: |
||
1664 | ;DEBUGF 1,"\n\n" |
||
1665 | pop edi esi edx ecx |
||
1666 | ; 5. |
||
1667 | call xfs_unlock |
||
1668 | xor eax, eax |
||
1669 | ret |
||
1670 | .error: |
||
1671 | ;DEBUGF 1,"\n\n" |
||
1672 | pop edi esi edx ecx |
||
1673 | push eax |
||
1674 | call xfs_unlock |
||
1675 | pop eax |
||
1676 | ret |
||
1677 | |||
1678 | |||
1679 | ;---------------------------------------------------------------- |
||
1680 | ; push inode_num_hi |
||
1681 | ; push inode_num_lo |
||
1682 | ; push [count] |
||
1683 | ; call xfs_get_inode_number_sf |
||
1684 | ;---------------------------------------------------------------- |
||
1685 | xfs_get_inode_number_sf: |
||
1686 | |||
1687 | ; inode numbers in short form directories may be 4 or 8 bytes long |
||
1688 | ; determine the length in run time and read inode number at given address |
||
1689 | |||
1690 | cmp byte[esp + 4 + xfs_dir2_sf_hdr.i8count], 0 ; i8count == 0 means 4 byte per inode number |
||
1691 | je .i4bytes |
||
1692 | .i8bytes: |
||
1693 | mov edx, [esp + 12] ; hi |
||
1694 | mov eax, [esp + 8] ; lo |
||
1695 | bswap edx ; big endian |
||
1696 | bswap eax |
||
1697 | ret 12 |
||
1698 | .i4bytes: |
||
1699 | xor edx, edx ; no hi |
||
1700 | mov eax, [esp + 12] ; hi = lo |
||
1701 | bswap eax ; big endian |
||
1702 | ret 12 |
||
1703 | |||
1704 | |||
1705 | ;---------------------------------------------------------------- |
||
1706 | ; push dest |
||
1707 | ; push src |
||
1708 | ; call xfs_get_inode_info |
||
1709 | ;---------------------------------------------------------------- |
||
1710 | xfs_get_inode_info: |
||
1711 | |||
1712 | ; get access time and other file properties |
||
1713 | ; useful for browsing directories |
||
1714 | ; called for each dir entry |
||
1715 | |||
1716 | ;DEBUGF 1,"get_inode_info\n" |
||
1717 | xor eax, eax |
||
1718 | mov edx, [esp + 4] |
||
1719 | movzx ecx, word[edx + xfs_inode.di_core.di_mode] |
||
1720 | xchg cl, ch |
||
1721 | ;DEBUGF 1,"di_mode: %x\n",ecx |
||
1722 | test ecx, S_IFDIR ; directory? |
||
1723 | jz @f |
||
1724 | mov eax, 0x10 ; set directory flag |
||
1725 | @@: |
||
1726 | |||
1727 | mov edi, [esp + 8] |
||
1728 | mov [edi + 0], eax |
||
1729 | mov eax, dword[edx + xfs_inode.di_core.di_size + 0] ; hi |
||
1730 | bswap eax |
||
1731 | mov dword[edi + 36], eax ; file size hi |
||
1732 | ;DEBUGF 1,"file_size hi: %d\n",eax |
||
1733 | mov eax, dword[edx + xfs_inode.di_core.di_size + 4] ; lo |
||
1734 | bswap eax |
||
1735 | mov dword[edi + 32], eax ; file size lo |
||
1736 | ;DEBUGF 1,"file_size lo: %d\n",eax |
||
1737 | |||
1738 | add edi, 8 |
||
1739 | mov eax, [edx + xfs_inode.di_core.di_ctime.t_sec] |
||
1740 | bswap eax |
||
1741 | push edx |
||
1742 | xor edx, edx |
||
1743 | add eax, 3054539008 ;(369 * 365 + 89) * 24 * 3600 |
||
1744 | adc edx, 2 |
||
1745 | call ntfs_datetime_to_bdfe.sec |
||
1746 | pop edx |
||
1747 | |||
1748 | mov eax, [edx + xfs_inode.di_core.di_atime.t_sec] |
||
1749 | bswap eax |
||
1750 | push edx |
||
1751 | xor edx, edx |
||
1752 | add eax, 3054539008 ;(369 * 365 + 89) * 24 * 3600 |
||
1753 | adc edx, 2 |
||
1754 | call ntfs_datetime_to_bdfe.sec |
||
1755 | pop edx |
||
1756 | |||
1757 | mov eax, [edx + xfs_inode.di_core.di_mtime.t_sec] |
||
1758 | bswap eax |
||
1759 | push edx |
||
1760 | xor edx, edx |
||
1761 | add eax, 3054539008 ;(369 * 365 + 89) * 24 * 3600 |
||
1762 | adc edx, 2 |
||
1763 | call ntfs_datetime_to_bdfe.sec |
||
1764 | pop edx |
||
1765 | |||
1766 | .quit: |
||
1767 | xor eax, eax |
||
1768 | ret 8 |
||
1769 | .error: |
||
1770 | movi eax, ERROR_FS_FAIL |
||
1771 | ret 8 |
||
1772 | |||
1773 | |||
1774 | ;---------------------------------------------------------------- |
||
1775 | ; push extent_data |
||
1776 | ; call xfs_extent_unpack |
||
1777 | ;---------------------------------------------------------------- |
||
1778 | xfs_extent_unpack: |
||
1779 | |||
1780 | ; extents come as packet 128bit bitfields |
||
1781 | ; lets unpack them to access internal fields |
||
1782 | ; write result to the XFS.extent structure |
||
1783 | |||
1784 | push eax ebx ecx edx |
||
1785 | mov ebx, [esp + 20] |
||
1786 | |||
1787 | xor eax, eax |
||
1788 | mov edx, [ebx + 0] |
||
1789 | bswap edx |
||
1790 | test edx, 0x80000000 ; mask, see documentation |
||
1791 | setnz al |
||
1792 | mov [ebp + XFS.extent.br_state], eax |
||
1793 | |||
1794 | and edx, 0x7fffffff ; mask |
||
1795 | mov eax, [ebx + 4] |
||
1796 | bswap eax |
||
1797 | shrd eax, edx, 9 |
||
1798 | shr edx, 9 |
||
1799 | mov dword[ebp + XFS.extent.br_startoff + 0], eax |
||
1800 | mov dword[ebp + XFS.extent.br_startoff + 4], edx |
||
1801 | |||
1802 | mov edx, [ebx + 4] |
||
1803 | mov eax, [ebx + 8] |
||
1804 | mov ecx, [ebx + 12] |
||
1805 | bswap edx |
||
1806 | bswap eax |
||
1807 | bswap ecx |
||
1808 | and edx, 0x000001ff ; mask |
||
1809 | shrd ecx, eax, 21 |
||
1810 | shrd eax, edx, 21 |
||
1811 | mov dword[ebp + XFS.extent.br_startblock + 0], ecx |
||
1812 | mov dword[ebp + XFS.extent.br_startblock + 4], eax |
||
1813 | |||
1814 | mov eax, [ebx + 12] |
||
1815 | bswap eax |
||
1816 | and eax, 0x001fffff ; mask |
||
1817 | mov [ebp + XFS.extent.br_blockcount], eax |
||
1818 | |||
1819 | pop edx ecx ebx eax |
||
1820 | ;DEBUGF 1,"extent.br_startoff : %d %d\n",[ebp+XFS.extent.br_startoff+4],[ebp+XFS.extent.br_startoff+0] |
||
1821 | ;DEBUGF 1,"extent.br_startblock: %d %d\n",[ebp+XFS.extent.br_startblock+4],[ebp+XFS.extent.br_startblock+0] |
||
1822 | ;DEBUGF 1,"extent.br_blockcount: %d\n",[ebp+XFS.extent.br_blockcount] |
||
1823 | ;DEBUGF 1,"extent.br_state : %d\n",[ebp+XFS.extent.br_state] |
||
1824 | ret 4 |
||
1825 | |||
1826 | |||
1827 | ;---------------------------------------------------------------- |
||
1828 | ; push namelen |
||
1829 | ; push name |
||
1830 | ; call xfs_hashname |
||
1831 | ;---------------------------------------------------------------- |
||
1832 | xfs_hashname: ; xfs_da_hashname |
||
1833 | |||
1834 | ; simple hash function |
||
1835 | ; never fails) |
||
1836 | |||
1837 | push ecx esi |
||
1838 | xor eax, eax |
||
1839 | mov esi, [esp + 12] ; name |
||
1840 | mov ecx, [esp + 16] ; namelen |
||
1841 | ;mov esi, '.' |
||
1842 | ;mov ecx, 1 |
||
1843 | ;DEBUGF 1,"hashname: %d %s\n",ecx,esi |
||
1844 | |||
1845 | @@: |
||
1846 | rol eax, 7 |
||
1847 | xor al, [esi] |
||
1848 | add esi, 1 |
||
1849 | loop @b |
||
1850 | |||
1851 | pop esi ecx |
||
1852 | ret 8 |
||
1853 | |||
1854 | |||
1855 | ;---------------------------------------------------------------- |
||
1856 | ; push len |
||
1857 | ; push base |
||
1858 | ; eax -- hash value |
||
1859 | ; call xfs_get_addr_by_hash |
||
1860 | ;---------------------------------------------------------------- |
||
1861 | xfs_get_addr_by_hash: |
||
1862 | |||
1863 | ; look for the directory entry offset by its file name hash |
||
1864 | ; allows fast file search for block, leaf and node directories |
||
1865 | ; binary (ternary) search |
||
1866 | |||
1867 | ;DEBUGF 1,"get_addr_by_hash\n" |
||
1868 | push ebx esi |
||
1869 | mov ebx, [esp + 12] ; left |
||
1870 | mov edx, [esp + 16] ; len |
||
1871 | .next: |
||
1872 | mov ecx, edx |
||
1873 | ; jecxz .error |
||
1874 | test ecx, ecx |
||
1875 | jz .error |
||
1876 | shr ecx, 1 |
||
1877 | mov esi, [ebx + ecx*8 + xfs_dir2_leaf_entry.hashval] |
||
1878 | bswap esi |
||
1879 | ;DEBUGF 1,"cmp 0x%x",esi |
||
1880 | cmp eax, esi |
||
1881 | jb .below |
||
1882 | ja .above |
||
1883 | mov eax, [ebx + ecx*8 + xfs_dir2_leaf_entry.address] |
||
1884 | pop esi ebx |
||
1885 | ret 8 |
||
1886 | .below: |
||
1887 | ;DEBUGF 1,"b\n" |
||
1888 | mov edx, ecx |
||
1889 | jmp .next |
||
1890 | .above: |
||
1891 | ;DEBUGF 1,"a\n" |
||
1892 | lea ebx, [ebx + ecx*8 + 8] |
||
1893 | sub edx, ecx |
||
1894 | dec edx |
||
1895 | jmp .next |
||
1896 | .error: |
||
1897 | mov eax, -1 |
||
1898 | pop esi ebx |
||
1899 | ret 8 |
||
1900 | |||
1901 | |||
1902 | ;---------------------------------------------------------------- |
||
1903 | ; xfs_GetFileInfo - XFS implementation of getting file info |
||
1904 | ; in: ebp = pointer to XFS structure |
||
1905 | ; in: esi+[esp+4] = name |
||
1906 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1907 | ; out: eax, ebx = return values for sysfunc 70 |
||
1908 | ;---------------------------------------------------------------- |
||
1909 | xfs_GetFileInfo: |
||
1910 | |||
1911 | ; lock partition |
||
1912 | ; get inode number by file name |
||
1913 | ; read inode |
||
1914 | ; get info |
||
1915 | ; unlock partition |
||
1916 | |||
1917 | push ecx edx esi edi |
||
1918 | call xfs_lock |
||
1919 | |||
1920 | add esi, [esp + 20] ; name |
||
1921 | ;DEBUGF 1,"xfs_GetFileInfo: |%s|\n",esi |
||
1922 | stdcall xfs_get_inode, esi |
||
1923 | mov ecx, edx |
||
1924 | or ecx, eax |
||
1925 | jnz @f |
||
1926 | movi eax, ERROR_FILE_NOT_FOUND |
||
1927 | jmp .error |
||
1928 | @@: |
||
1929 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.cur_inode] |
||
1930 | test eax, eax |
||
1931 | movi eax, ERROR_FS_FAIL |
||
1932 | jnz .error |
||
1933 | |||
1934 | stdcall xfs_get_inode_info, edx, [ebx + 16] |
||
1935 | |||
1936 | .quit: |
||
1937 | call xfs_unlock |
||
1938 | pop edi esi edx ecx |
||
1939 | xor eax, eax |
||
1940 | ;DEBUGF 1,"quit\n\n" |
||
1941 | ret |
||
1942 | .error: |
||
1943 | call xfs_unlock |
||
1944 | pop edi esi edx ecx |
||
1945 | ;DEBUGF 1,"error\n\n" |
||
1946 | ret |
||
1947 | |||
1948 | |||
1949 | ;---------------------------------------------------------------- |
||
1950 | ; xfs_Read - XFS implementation of reading a file |
||
1951 | ; in: ebp = pointer to XFS structure |
||
1952 | ; in: esi+[esp+4] = name |
||
1953 | ; in: ebx = pointer to parameters from sysfunc 70 |
||
1954 | ; out: eax, ebx = return values for sysfunc 70 |
||
1955 | ;---------------------------------------------------------------- |
||
1956 | xfs_Read: |
||
1957 | push ebx ecx edx esi edi |
||
1958 | call xfs_lock |
||
1959 | |||
1960 | add esi, [esp + 24] |
||
1961 | ;DEBUGF 1,"xfs_Read: %d %d |%s|\n",[ebx+4],[ebx+12],esi |
||
1962 | stdcall xfs_get_inode, esi |
||
1963 | mov ecx, edx |
||
1964 | or ecx, eax |
||
1965 | jnz @f |
||
1966 | movi eax, ERROR_FILE_NOT_FOUND |
||
1967 | jmp .error |
||
1968 | @@: |
||
1969 | stdcall xfs_read_inode, eax, edx, [ebp + XFS.cur_inode] |
||
1970 | test eax, eax |
||
1971 | movi eax, ERROR_FS_FAIL |
||
1972 | jnz .error |
||
1973 | mov [ebp + XFS.cur_inode_save], edx |
||
1974 | |||
1975 | cmp byte[edx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_EXTENTS |
||
1976 | jne .not_extent_list |
||
1977 | jmp .extent_list |
||
1978 | .not_extent_list: |
||
1979 | cmp byte[edx + xfs_inode.di_core.di_format], XFS_DINODE_FMT_BTREE |
||
1980 | jne .not_btree |
||
1981 | jmp .btree |
||
1982 | .not_btree: |
||
1983 | DEBUGF 1,"XFS: NOT IMPLEMENTED: FILE FORMAT\n" |
||
1984 | movi eax, ERROR_FS_FAIL |
||
1985 | jmp .error |
||
1986 | .extent_list: |
||
1987 | mov ecx, [ebx + 12] ; bytes to read |
||
1988 | mov edi, [ebx + 16] ; buffer for data |
||
1989 | mov esi, [ebx + 8] ; offset_hi |
||
1990 | mov ebx, [ebx + 4] ; offset_lo |
||
1991 | |||
1992 | mov eax, dword[edx + xfs_inode.di_core.di_size + 4] ; lo |
||
1993 | bswap eax |
||
1994 | mov dword[ebp + XFS.bytes_left_in_file + 0], eax ; lo |
||
1995 | mov eax, dword[edx + xfs_inode.di_core.di_size + 0] ; hi |
||
1996 | bswap eax |
||
1997 | mov dword[ebp + XFS.bytes_left_in_file + 4], eax ; hi |
||
1998 | |||
1999 | mov eax, [edx + xfs_inode.di_core.di_nextents] |
||
2000 | bswap eax |
||
2001 | mov [ebp + XFS.left_extents], eax |
||
2002 | |||
2003 | mov dword[ebp + XFS.bytes_read], 0 ; actually read bytes |
||
2004 | |||
2005 | xor eax, eax ; extent offset in list |
||
2006 | .extent_list.next_extent: |
||
2007 | ;DEBUGF 1,"extent_list.next_extent, eax: 0x%x\n",eax |
||
2008 | ;DEBUGF 1,"bytes_to_read: %d\n",ecx |
||
2009 | ;DEBUGF 1,"cur file offset: %d %d\n",esi,ebx |
||
2010 | ;DEBUGF 1,"esp: 0x%x\n",esp |
||
2011 | cmp [ebp + XFS.left_extents], 0 |
||
2012 | jne @f |
||
2013 | test ecx, ecx |
||
2014 | jz .quit |
||
2015 | movi eax, ERROR_END_OF_FILE |
||
2016 | jmp .error |
||
2017 | @@: |
||
2018 | push eax |
||
2019 | lea eax, [edx + xfs_inode.di_u + eax + xfs_bmbt_rec.l0] |
||
2020 | stdcall xfs_extent_unpack, eax |
||
2021 | pop eax |
||
2022 | dec [ebp + XFS.left_extents] |
||
2023 | add eax, sizeof.xfs_bmbt_rec |
||
2024 | push eax ebx ecx edx esi |
||
2025 | mov ecx, [ebp + XFS.blocklog] |
||
2026 | shrd ebx, esi, cl |
||
2027 | shr esi, cl |
||
2028 | cmp esi, dword[ebp + XFS.extent.br_startoff + 4] |
||
2029 | jb .extent_list.to_hole ; handle sparse files |
||
2030 | ja @f |
||
2031 | cmp ebx, dword[ebp + XFS.extent.br_startoff + 0] |
||
2032 | jb .extent_list.to_hole ; handle sparse files |
||
2033 | je .extent_list.to_extent ; read from the start of current extent |
||
2034 | @@: |
||
2035 | xor edx, edx |
||
2036 | mov eax, [ebp + XFS.extent.br_blockcount] |
||
2037 | add eax, dword[ebp + XFS.extent.br_startoff + 0] |
||
2038 | adc edx, dword[ebp + XFS.extent.br_startoff + 4] |
||
2039 | ;DEBUGF 1,"br_startoff: %d %d\n",edx,eax |
||
2040 | cmp esi, edx |
||
2041 | ja .extent_list.skip_extent |
||
2042 | jb .extent_list.to_extent |
||
2043 | cmp ebx, eax |
||
2044 | jae .extent_list.skip_extent |
||
2045 | jmp .extent_list.to_extent |
||
2046 | .extent_list.to_hole: |
||
2047 | ;DEBUGF 1,"extent_list.to_hole\n" |
||
2048 | pop esi edx ecx ebx eax |
||
2049 | jmp .extent_list.read_hole |
||
2050 | .extent_list.to_extent: |
||
2051 | ;DEBUGF 1,"extent_list.to_extent\n" |
||
2052 | pop esi edx ecx ebx eax |
||
2053 | jmp .extent_list.read_extent |
||
2054 | .extent_list.skip_extent: |
||
2055 | ;DEBUGF 1,"extent_list.skip_extent\n" |
||
2056 | pop esi edx ecx ebx eax |
||
2057 | jmp .extent_list.next_extent |
||
2058 | |||
2059 | .extent_list.read_hole: |
||
2060 | ;DEBUGF 1,"hole: offt: 0x%x%x ",esi,ebx |
||
2061 | push eax edx |
||
2062 | mov eax, dword[ebp + XFS.extent.br_startoff + 0] |
||
2063 | mov edx, dword[ebp + XFS.extent.br_startoff + 4] |
||
2064 | push esi ebx |
||
2065 | mov ebx, ecx |
||
2066 | sub eax, ebx ; get hole_size, it is 64 bit |
||
2067 | sbb edx, 0 ; now edx:eax contains the size of hole |
||
2068 | ;DEBUGF 1,"size: 0x%x%x\n",edx,eax |
||
2069 | jnz @f ; if hole size >= 2^32, write bytes_to_read zero bytes |
||
2070 | cmp eax, ecx ; if hole size >= bytes_to_read, write bytes_to_read zeros |
||
2071 | jae @f |
||
2072 | mov ecx, eax ; if hole is < than bytes_to_read, write hole size zeros |
||
2073 | @@: |
||
2074 | sub ebx, ecx ; bytes_to_read - hole_size = left_to_read |
||
2075 | add dword[esp + 0], ecx ; update pushed file offset |
||
2076 | adc dword[esp + 4], 0 |
||
2077 | xor eax, eax ; hole is made of zeros |
||
2078 | rep stosb |
||
2079 | mov ecx, ebx |
||
2080 | pop ebx esi |
||
2081 | |||
2082 | test ecx, ecx ; all requested bytes are read? |
||
2083 | pop edx eax |
||
2084 | jz .quit |
||
2085 | jmp .extent_list.read_extent ; continue from the start of unpacked extent |
||
2086 | |||
2087 | .extent_list.read_extent: |
||
2088 | ;DEBUGF 1,"extent_list.read_extent\n" |
||
2089 | push eax ebx ecx edx esi |
||
2090 | mov eax, ebx |
||
2091 | mov edx, esi |
||
2092 | mov ecx, [ebp + XFS.blocklog] |
||
2093 | shrd eax, edx, cl |
||
2094 | shr edx, cl |
||
2095 | sub eax, dword[ebp + XFS.extent.br_startoff + 0] ; skip esi:ebx ? |
||
2096 | sbb edx, dword[ebp + XFS.extent.br_startoff + 4] |
||
2097 | sub [ebp + XFS.extent.br_blockcount], eax |
||
2098 | add dword[ebp + XFS.extent.br_startblock + 0], eax |
||
2099 | adc dword[ebp + XFS.extent.br_startblock + 4], 0 |
||
2100 | .extent_list.read_extent.next_block: |
||
2101 | ;DEBUGF 1,"extent_list.read_extent.next_block\n" |
||
2102 | cmp [ebp + XFS.extent.br_blockcount], 0 ; out of blocks in current extent? |
||
2103 | jne @f |
||
2104 | pop esi edx ecx ebx eax |
||
2105 | jmp .extent_list.next_extent ; go to next extent |
||
2106 | @@: |
||
2107 | mov eax, dword[ebp + XFS.extent.br_startblock + 0] |
||
2108 | mov edx, dword[ebp + XFS.extent.br_startblock + 4] |
||
2109 | push ebx |
||
2110 | mov ebx, [ebp + XFS.cur_block] |
||
2111 | ;DEBUGF 1,"read block: 0x%x%x\n",edx,eax |
||
2112 | stdcall xfs_read_block |
||
2113 | test eax, eax |
||
2114 | pop ebx |
||
2115 | jz @f |
||
2116 | pop esi edx ecx ebx eax |
||
2117 | movi eax, ERROR_FS_FAIL |
||
2118 | jmp .error |
||
2119 | @@: |
||
2120 | dec [ebp + XFS.extent.br_blockcount] |
||
2121 | add dword[ebp + XFS.extent.br_startblock + 0], 1 |
||
2122 | adc dword[ebp + XFS.extent.br_startblock + 4], 0 |
||
2123 | mov esi, [ebp + XFS.cur_block] |
||
2124 | mov ecx, [ebp + XFS.blocklog] |
||
2125 | mov eax, 1 |
||
2126 | shl eax, cl |
||
2127 | dec eax ; get blocklog mask |
||
2128 | and eax, ebx ; offset in current block |
||
2129 | add esi, eax |
||
2130 | neg eax |
||
2131 | add eax, [ebp + XFS.blocksize] |
||
2132 | mov ecx, [esp + 8] ; pushed ecx, bytes_to_read |
||
2133 | cmp ecx, eax ; is current block enough? |
||
2134 | jbe @f ; if so, read bytes_to_read bytes |
||
2135 | mov ecx, eax ; otherwise read the block up to the end |
||
2136 | @@: |
||
2137 | sub [esp + 8], ecx ; left_to_read |
||
2138 | add [esp + 12], ecx ; update current file offset, pushed ebx |
||
2139 | sub dword[ebp + XFS.bytes_left_in_file + 0], ecx |
||
2140 | sbb dword[ebp + XFS.bytes_left_in_file + 4], 0 |
||
2141 | jnc @f |
||
2142 | add dword[ebp + XFS.bytes_left_in_file + 0], ecx |
||
2143 | mov ecx, dword[ebp + XFS.bytes_left_in_file + 0] |
||
2144 | mov dword[ebp + XFS.bytes_left_in_file + 0], 0 |
||
2145 | mov dword[ebp + XFS.bytes_left_in_file + 4], 0 |
||
2146 | @@: |
||
2147 | add [ebp + XFS.bytes_read], ecx |
||
2148 | adc [esp + 0], dword 0 ; pushed esi |
||
2149 | ;DEBUGF 1,"read data: %d\n",ecx |
||
2150 | rep movsb |
||
2151 | mov ecx, [esp + 8] |
||
2152 | ;DEBUGF 1,"left_to_read: %d\n",ecx |
||
2153 | xor ebx, ebx |
||
2154 | test ecx, ecx |
||
2155 | jz @f |
||
2156 | cmp dword[ebp + XFS.bytes_left_in_file + 4], 0 |
||
2157 | jne .extent_list.read_extent.next_block |
||
2158 | cmp dword[ebp + XFS.bytes_left_in_file + 0], 0 |
||
2159 | jne .extent_list.read_extent.next_block |
||
2160 | @@: |
||
2161 | pop esi edx ecx ebx eax |
||
2162 | jmp .quit |
||
2163 | |||
2164 | .btree: |
||
2165 | mov ecx, [ebx + 12] ; bytes to read |
||
2166 | mov [ebp + XFS.bytes_to_read], ecx |
||
2167 | mov edi, [ebx + 16] ; buffer for data |
||
2168 | mov esi, [ebx + 8] ; offset_hi |
||
2169 | mov ebx, [ebx + 4] ; offset_lo |
||
2170 | mov dword[ebp + XFS.file_offset + 0], ebx |
||
2171 | mov dword[ebp + XFS.file_offset + 4], esi |
||
2172 | mov [ebp + XFS.buffer_pos], edi |
||
2173 | |||
2174 | mov eax, dword[edx + xfs_inode.di_core.di_size + 4] ; lo |
||
2175 | bswap eax |
||
2176 | mov dword[ebp + XFS.bytes_left_in_file + 0], eax ; lo |
||
2177 | mov eax, dword[edx + xfs_inode.di_core.di_size + 0] ; hi |
||
2178 | bswap eax |
||
2179 | mov dword[ebp + XFS.bytes_left_in_file + 4], eax ; hi |
||
2180 | |||
2181 | mov eax, [edx + xfs_inode.di_core.di_nextents] |
||
2182 | bswap eax |
||
2183 | mov [ebp + XFS.left_extents], eax |
||
2184 | |||
2185 | mov dword[ebp + XFS.bytes_read], 0 ; actually read bytes |
||
2186 | |||
2187 | push ebx ecx edx esi edi |
||
2188 | mov [ebp + XFS.eof], 0 |
||
2189 | mov eax, dword[ebp + XFS.file_offset + 0] |
||
2190 | mov edx, dword[ebp + XFS.file_offset + 4] |
||
2191 | add eax, [ebp + XFS.bytes_to_read] |
||
2192 | adc edx, 0 |
||
2193 | sub eax, dword[ebp + XFS.bytes_left_in_file + 0] |
||
2194 | sbb edx, dword[ebp + XFS.bytes_left_in_file + 4] |
||
2195 | jc @f ; file_offset + bytes_to_read < file_size |
||
2196 | jz @f ; file_offset + bytes_to_read = file_size |
||
2197 | mov [ebp + XFS.eof], 1 |
||
2198 | cmp edx, 0 |
||
2199 | jne .error.eof |
||
2200 | sub dword[ebp + XFS.bytes_to_read], eax |
||
2201 | jc .error.eof |
||
2202 | jz .error.eof |
||
2203 | @@: |
||
2204 | stdcall xfs_btree_read, 0, 0, 1 |
||
2205 | pop edi esi edx ecx ebx |
||
2206 | test eax, eax |
||
2207 | jnz .error |
||
2208 | cmp [ebp + XFS.eof], 1 |
||
2209 | jne .quit |
||
2210 | jmp .error.eof |
||
2211 | |||
2212 | |||
2213 | .quit: |
||
2214 | call xfs_unlock |
||
2215 | pop edi esi edx ecx ebx |
||
2216 | xor eax, eax |
||
2217 | mov ebx, [ebp + XFS.bytes_read] |
||
2218 | ;DEBUGF 1,"quit: %d\n\n",ebx |
||
2219 | ret |
||
2220 | .error.eof: |
||
2221 | movi eax, ERROR_END_OF_FILE |
||
2222 | .error: |
||
2223 | ;DEBUGF 1,"error\n\n" |
||
2224 | call xfs_unlock |
||
2225 | pop edi esi edx ecx ebx |
||
2226 | mov ebx, [ebp + XFS.bytes_read] |
||
2227 | ret |
||
2228 | |||
2229 | |||
2230 | ;---------------------------------------------------------------- |
||
2231 | ; push max_offset_hi |
||
2232 | ; push max_offset_lo |
||
2233 | ; push nextents |
||
2234 | ; push block_number_hi |
||
2235 | ; push block_number_lo |
||
2236 | ; push extent_list |
||
2237 | ; -1 / read block number |
||
2238 | ;---------------------------------------------------------------- |
||
2239 | xfs_extent_list_read_dirblock: ; skips holes |
||
2240 | ;DEBUGF 1,"xfs_extent_list_read_dirblock\n" |
||
2241 | push ebx esi edi |
||
2242 | ;mov eax, [esp+28] |
||
2243 | ;DEBUGF 1,"nextents: %d\n",eax |
||
2244 | ;mov eax, [esp+20] |
||
2245 | ;mov edx, [esp+24] |
||
2246 | ;DEBUGF 1,"block_number: 0x%x%x\n",edx,eax |
||
2247 | ;mov eax, [esp+32] |
||
2248 | ;mov edx, [esp+36] |
||
2249 | ;DEBUGF 1,"max_addr : 0x%x%x\n",edx,eax |
||
2250 | mov ebx, [esp + 16] |
||
2251 | mov esi, [esp + 20] |
||
2252 | mov edi, [esp + 24] |
||
2253 | ; mov ecx, [esp + 28] ; nextents |
||
2254 | .next_extent: |
||
2255 | ;DEBUGF 1,"next_extent\n" |
||
2256 | dec dword[esp + 28] |
||
2257 | js .error |
||
2258 | stdcall xfs_extent_unpack, ebx |
||
2259 | add ebx, sizeof.xfs_bmbt_rec ; next extent |
||
2260 | mov edx, dword[ebp + XFS.extent.br_startoff + 4] |
||
2261 | mov eax, dword[ebp + XFS.extent.br_startoff + 0] |
||
2262 | cmp edx, [esp + 36] ; max_offset_hi |
||
2263 | ja .error |
||
2264 | jb @f |
||
2265 | cmp eax, [esp + 32] ; max_offset_lo |
||
2266 | jae .error |
||
2267 | @@: |
||
2268 | cmp edi, edx |
||
2269 | jb .hole |
||
2270 | ja .check_count |
||
2271 | cmp esi, eax |
||
2272 | jb .hole |
||
2273 | ja .check_count |
||
2274 | jmp .read_block |
||
2275 | .hole: |
||
2276 | ;DEBUGF 1,"hole\n" |
||
2277 | mov esi, eax |
||
2278 | mov edi, edx |
||
2279 | jmp .read_block |
||
2280 | .check_count: |
||
2281 | ;DEBUGF 1,"check_count\n" |
||
2282 | add eax, [ebp + XFS.extent.br_blockcount] |
||
2283 | adc edx, 0 |
||
2284 | cmp edi, edx |
||
2285 | ja .next_extent |
||
2286 | jb .read_block |
||
2287 | cmp esi, eax |
||
2288 | jae .next_extent |
||
2289 | ; jmp .read_block |
||
2290 | .read_block: |
||
2291 | ;DEBUGF 1,"read_block\n" |
||
2292 | push esi edi |
||
2293 | sub esi, dword[ebp + XFS.extent.br_startoff + 0] |
||
2294 | sbb edi, dword[ebp + XFS.extent.br_startoff + 4] |
||
2295 | add esi, dword[ebp + XFS.extent.br_startblock + 0] |
||
2296 | adc edi, dword[ebp + XFS.extent.br_startblock + 4] |
||
2297 | stdcall xfs_read_dirblock, esi, edi, [ebp + XFS.cur_dirblock] |
||
2298 | pop edx eax |
||
2299 | .quit: |
||
2300 | ;DEBUGF 1,"xfs_extent_list_read_dirblock: quit\n" |
||
2301 | pop edi esi ebx |
||
2302 | ret 24 |
||
2303 | .error: |
||
2304 | ;DEBUGF 1,"xfs_extent_list_read_dirblock: error\n" |
||
2305 | xor eax, eax |
||
2306 | dec eax |
||
2307 | mov edx, eax |
||
2308 | pop edi esi ebx |
||
2309 | ret 24 |
||
2310 | |||
2311 | |||
2312 | ;---------------------------------------------------------------- |
||
2313 | ; push dirblock_num |
||
2314 | ; push nextents |
||
2315 | ; push extent_list |
||
2316 | ;---------------------------------------------------------------- |
||
2317 | xfs_dir2_node_get_numfiles: |
||
2318 | |||
2319 | ; unfortunately, we need to set 'total entries' field |
||
2320 | ; this often requires additional effort, since there is no such a number in most directory ondisk formats |
||
2321 | |||
2322 | ;DEBUGF 1,"xfs_dir2_node_get_numfiles\n" |
||
2323 | push ebx ecx edx esi edi |
||
2324 | |||
2325 | mov eax, [esp + 24] |
||
2326 | mov edx, [esp + 28] |
||
2327 | mov esi, [esp + 32] |
||
2328 | stdcall xfs_extent_list_read_dirblock, eax, esi, 0, edx, -1, -1 |
||
2329 | mov ecx, eax |
||
2330 | and ecx, edx |
||
2331 | inc ecx |
||
2332 | jnz @f |
||
2333 | movi eax, ERROR_FS_FAIL |
||
2334 | jmp .error |
||
2335 | @@: |
||
2336 | mov ebx, [ebp + XFS.cur_dirblock] |
||
2337 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DA_NODE_MAGIC |
||
2338 | je .node |
||
2339 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DIR2_LEAFN_MAGIC |
||
2340 | je .leaf |
||
2341 | mov eax, ERROR_FS_FAIL |
||
2342 | jmp .error |
||
2343 | |||
2344 | .node: |
||
2345 | ;DEBUGF 1,".node\n" |
||
2346 | mov edi, [ebx + xfs_da_intnode.hdr.info.forw] |
||
2347 | bswap edi |
||
2348 | mov eax, [esp + 24] |
||
2349 | mov edx, [esp + 28] |
||
2350 | mov esi, [ebx + xfs_da_intnode.btree.before] |
||
2351 | bswap esi |
||
2352 | stdcall xfs_dir2_node_get_numfiles, eax, edx, esi |
||
2353 | test eax, eax |
||
2354 | jnz .error |
||
2355 | jmp .common |
||
2356 | |||
2357 | .leaf: |
||
2358 | ;DEBUGF 1,".leaf\n" |
||
2359 | movzx ecx, word[ebx + xfs_dir2_leaf.hdr.count] |
||
2360 | xchg cl, ch |
||
2361 | movzx eax, word[ebx + xfs_dir2_leaf.hdr.stale] |
||
2362 | xchg al, ah |
||
2363 | sub ecx, eax |
||
2364 | add [ebp + XFS.entries_read], ecx |
||
2365 | mov edi, [ebx + xfs_dir2_leaf.hdr.info.forw] |
||
2366 | bswap edi |
||
2367 | jmp .common |
||
2368 | |||
2369 | .common: |
||
2370 | test edi, edi |
||
2371 | jz .quit |
||
2372 | mov esi, edi |
||
2373 | mov eax, [esp + 24] |
||
2374 | mov edx, [esp + 28] |
||
2375 | stdcall xfs_dir2_node_get_numfiles, eax, edx, esi |
||
2376 | test eax, eax |
||
2377 | jnz .error |
||
2378 | jmp .quit |
||
2379 | |||
2380 | .quit: |
||
2381 | ;DEBUGF 1,".quit\n" |
||
2382 | pop edi esi edx ecx ebx |
||
2383 | xor eax, eax |
||
2384 | ret 12 |
||
2385 | .error: |
||
2386 | ;DEBUGF 1,".error\n" |
||
2387 | pop edi esi edx ecx ebx |
||
2388 | movi eax, ERROR_FS_FAIL |
||
2389 | ret 12 |
||
2390 | |||
2391 | |||
2392 | ;---------------------------------------------------------------- |
||
2393 | ; push hash |
||
2394 | ; push dirblock_num |
||
2395 | ; push nextents |
||
2396 | ; push extent_list |
||
2397 | ;---------------------------------------------------------------- |
||
2398 | xfs_dir2_lookupdir_node: |
||
2399 | DEBUGF 1,"xfs_dir2_lookupdir_node\n" |
||
2400 | push ebx edx esi edi |
||
2401 | |||
2402 | mov eax, [esp + 20] |
||
2403 | mov edx, [esp + 24] |
||
2404 | mov esi, [esp + 28] |
||
2405 | DEBUGF 1,"read dirblock: 0x%x %d\n",esi,esi |
||
2406 | stdcall xfs_extent_list_read_dirblock, eax, esi, 0, edx, -1, -1 |
||
2407 | DEBUGF 1,"dirblock read: 0x%x%x\n",edx,eax |
||
2408 | mov ecx, eax |
||
2409 | and ecx, edx |
||
2410 | inc ecx |
||
2411 | jnz @f |
||
2412 | movi eax, ERROR_FS_FAIL |
||
2413 | jmp .error |
||
2414 | @@: |
||
2415 | DEBUGF 1,"checkpoint #1\n" |
||
2416 | mov ebx, [ebp + XFS.cur_dirblock] |
||
2417 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DA_NODE_MAGIC |
||
2418 | je .node |
||
2419 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DIR2_LEAFN_MAGIC |
||
2420 | je .leaf |
||
2421 | mov eax, ERROR_FS_FAIL |
||
2422 | DEBUGF 1,"checkpoint #2\n" |
||
2423 | jmp .error |
||
2424 | |||
2425 | .node: |
||
2426 | DEBUGF 1,".node\n" |
||
2427 | mov edi, [esp + 32] ; hash |
||
2428 | movzx ecx, word[ebx + xfs_da_intnode.hdr.count] |
||
2429 | xchg cl, ch |
||
2430 | mov [ebp + XFS.left_leaves], ecx |
||
2431 | xor ecx, ecx |
||
2432 | .node.next_leaf: |
||
2433 | mov esi, [ebx + xfs_da_intnode.btree + ecx*sizeof.xfs_da_node_entry + xfs_da_node_entry.hashval] |
||
2434 | bswap esi |
||
2435 | cmp edi, esi |
||
2436 | jbe .node.leaf_found |
||
2437 | inc ecx |
||
2438 | cmp ecx, [ebp + XFS.left_leaves] |
||
2439 | jne .node.next_leaf |
||
2440 | mov eax, ERROR_FILE_NOT_FOUND |
||
2441 | jmp .error |
||
2442 | @@: |
||
2443 | .node.leaf_found: |
||
2444 | mov eax, [esp + 20] |
||
2445 | mov edx, [esp + 24] |
||
2446 | mov esi, [ebx + xfs_da_intnode.btree + ecx*sizeof.xfs_da_node_entry + xfs_da_node_entry.before] |
||
2447 | bswap esi |
||
2448 | stdcall xfs_dir2_lookupdir_node, eax, edx, esi, edi |
||
2449 | test eax, eax |
||
2450 | jz .quit |
||
2451 | movi eax, ERROR_FILE_NOT_FOUND |
||
2452 | jmp .error |
||
2453 | |||
2454 | .leaf: |
||
2455 | DEBUGF 1,".leaf\n" |
||
2456 | movzx ecx, [ebx + xfs_dir2_leaf.hdr.count] |
||
2457 | xchg cl, ch |
||
2458 | lea esi, [ebx + xfs_dir2_leaf.ents] |
||
2459 | mov eax, [esp + 32] |
||
2460 | stdcall xfs_get_addr_by_hash, esi, ecx |
||
2461 | cmp eax, -1 |
||
2462 | je .error |
||
2463 | mov ecx, eax |
||
2464 | jmp .quit |
||
2465 | |||
2466 | .quit: |
||
2467 | DEBUGF 1,".quit\n" |
||
2468 | pop edi esi edx ebx |
||
2469 | xor eax, eax |
||
2470 | ret 16 |
||
2471 | .error: |
||
2472 | DEBUGF 1,".error\n" |
||
2473 | pop edi esi edx ebx |
||
2474 | ret 16 |
||
2475 | |||
2476 | |||
2477 | ;---------------------------------------------------------------- |
||
2478 | ; push dirblock_num |
||
2479 | ; push nextents |
||
2480 | ; push extent_list |
||
2481 | ;---------------------------------------------------------------- |
||
2482 | xfs_dir2_btree_get_numfiles: |
||
2483 | ;DEBUGF 1,"xfs_dir2_node_get_numfiles\n" |
||
2484 | push ebx ecx edx esi edi |
||
2485 | |||
2486 | mov eax, [esp + 24] |
||
2487 | mov edx, [esp + 28] |
||
2488 | mov esi, [esp + 32] |
||
2489 | stdcall xfs_extent_list_read_dirblock, eax, esi, 0, edx, -1, -1 |
||
2490 | mov ecx, eax |
||
2491 | and ecx, edx |
||
2492 | inc ecx |
||
2493 | jnz @f |
||
2494 | movi eax, ERROR_FS_FAIL |
||
2495 | jmp .error |
||
2496 | @@: |
||
2497 | mov ebx, [ebp + XFS.cur_dirblock] |
||
2498 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DA_NODE_MAGIC |
||
2499 | je .node |
||
2500 | cmp word[ebx + xfs_da_intnode.hdr.info.magic], XFS_DIR2_LEAFN_MAGIC |
||
2501 | je .leaf |
||
2502 | mov eax, ERROR_FS_FAIL |
||
2503 | jmp .error |
||
2504 | |||
2505 | .node: |
||
2506 | ;DEBUGF 1,".node\n" |
||
2507 | mov edi, [ebx + xfs_da_intnode.hdr.info.forw] |
||
2508 | bswap edi |
||
2509 | mov eax, [esp + 24] |
||
2510 | mov edx, [esp + 28] |
||
2511 | mov esi, [ebx + xfs_da_intnode.btree.before] |
||
2512 | bswap esi |
||
2513 | stdcall xfs_dir2_node_get_numfiles, eax, edx, esi |
||
2514 | test eax, eax |
||
2515 | jnz .error |
||
2516 | jmp .common |
||
2517 | |||
2518 | .leaf: |
||
2519 | ;DEBUGF 1,".leaf\n" |
||
2520 | movzx ecx, word[ebx + xfs_dir2_leaf.hdr.count] |
||
2521 | xchg cl, ch |
||
2522 | movzx eax, word[ebx + xfs_dir2_leaf.hdr.stale] |
||
2523 | xchg al, ah |
||
2524 | sub ecx, eax |
||
2525 | add [ebp + XFS.entries_read], ecx |
||
2526 | mov edi, [ebx + xfs_dir2_leaf.hdr.info.forw] |
||
2527 | bswap edi |
||
2528 | jmp .common |
||
2529 | |||
2530 | .common: |
||
2531 | test edi, edi |
||
2532 | jz .quit |
||
2533 | mov esi, edi |
||
2534 | mov eax, [esp + 24] |
||
2535 | mov edx, [esp + 28] |
||
2536 | stdcall xfs_dir2_node_get_numfiles, eax, edx, esi |
||
2537 | test eax, eax |
||
2538 | jnz .error |
||
2539 | jmp .quit |
||
2540 | |||
2541 | .quit: |
||
2542 | ;DEBUGF 1,".quit\n" |
||
2543 | pop edi esi edx ecx ebx |
||
2544 | xor eax, eax |
||
2545 | ret 12 |
||
2546 | .error: |
||
2547 | ;DEBUGF 1,".error\n" |
||
2548 | pop edi esi edx ecx ebx |
||
2549 | movi eax, ERROR_FS_FAIL |
||
2550 | ret 12 |
||
2551 | |||
2552 | |||
2553 | ;---------------------------------------------------------------- |
||
2554 | ; push is_root |
||
2555 | ; push block_hi |
||
2556 | ; push block_lo |
||
2557 | ;---------------------------------------------------------------- |
||
2558 | xfs_btree_read: |
||
2559 | push ebx ecx edx esi edi |
||
2560 | cmp dword[esp + 32], 1 ; is root? |
||
2561 | je .root |
||
2562 | jmp .not_root |
||
2563 | .root: |
||
2564 | DEBUGF 1,".root\n" |
||
2565 | mov ebx, [ebp + XFS.cur_inode_save] |
||
2566 | add ebx, xfs_inode.di_u |
||
2567 | movzx edx, [ebx + xfs_bmdr_block.bb_numrecs] |
||
2568 | xchg dl, dh |
||
2569 | dec edx |
||
2570 | add ebx, sizeof.xfs_bmdr_block |
||
2571 | xor eax, eax |
||
2572 | dec eax |
||
2573 | .root.next_key: |
||
2574 | DEBUGF 1,".root.next_key\n" |
||
2575 | cmp [ebp + XFS.bytes_to_read], 0 |
||
2576 | je .quit |
||
2577 | inc eax |
||
2578 | cmp eax, edx ; out of keys? |
||
2579 | ja .root.key_found ; there is no length field, so try the last key |
||
2580 | lea edi, [ebx + sizeof.xfs_bmbt_key*eax + 0] |
||
2581 | lea esi, [ebx + sizeof.xfs_bmbt_key*eax + 4] |
||
2582 | bswap edi |
||
2583 | bswap esi |
||
2584 | mov ecx, [ebp + XFS.blocklog] |
||
2585 | shld edi, esi, cl |
||
2586 | shl esi, cl |
||
2587 | cmp edi, dword[ebp + XFS.file_offset + 4] |
||
2588 | ja .root.prev_or_hole |
||
2589 | jb .root.next_key |
||
2590 | cmp esi, dword[ebp + XFS.file_offset + 0] |
||
2591 | ja .root.prev_or_hole |
||
2592 | jb .root.next_key |
||
2593 | jmp .root.key_found |
||
2594 | .root.prev_or_hole: |
||
2595 | DEBUGF 1,".root.prev_or_hole\n" |
||
2596 | test eax, eax |
||
2597 | jz .root.hole |
||
2598 | dec eax |
||
2599 | jmp .root.key_found |
||
2600 | .root.hole: |
||
2601 | DEBUGF 1,".root.hole\n" |
||
2602 | push eax edx esi edi |
||
2603 | mov ecx, [ebp + XFS.blocklog] |
||
2604 | shld edi, esi, cl |
||
2605 | shl esi, cl |
||
2606 | sub esi, dword[ebp + XFS.file_offset + 0] |
||
2607 | sbb edi, dword[ebp + XFS.file_offset + 4] |
||
2608 | mov ecx, [ebp + XFS.bytes_to_read] |
||
2609 | cmp edi, 0 ; hole size >= 2^32 |
||
2610 | jne @f |
||
2611 | cmp ecx, esi |
||
2612 | jbe @f |
||
2613 | mov ecx, esi |
||
2614 | @@: |
||
2615 | add dword[ebp + XFS.file_offset + 0], ecx |
||
2616 | adc dword[ebp + XFS.file_offset + 4], 0 |
||
2617 | sub [ebp + XFS.bytes_to_read], ecx |
||
2618 | xor eax, eax |
||
2619 | mov edi, [ebp + XFS.buffer_pos] |
||
2620 | rep stosb |
||
2621 | mov [ebp + XFS.buffer_pos], edi |
||
2622 | pop edi esi edx eax |
||
2623 | jmp .root.next_key |
||
2624 | .root.key_found: |
||
2625 | DEBUGF 1,".root.key_found\n" |
||
2626 | mov edx, [ebp + XFS.cur_inode_save] |
||
2627 | mov eax, [ebp + XFS.inodesize] |
||
2628 | sub eax, xfs_inode.di_u |
||
2629 | cmp [edx + xfs_inode.di_core.di_forkoff], 0 |
||
2630 | je @f |
||
2631 | movzx eax, [edx + xfs_inode.di_core.di_forkoff] |
||
2632 | shl eax, XFS_DIR2_DATA_ALIGN_LOG ; 3 |
||
2633 | @@: |
||
2634 | sub eax, sizeof.xfs_bmdr_block |
||
2635 | shr eax, 4 ;log2(sizeof.xfs_bmbt_key + sizeof.xfs_bmdr_ptr) |
||
2636 | mov edx, [ebx + sizeof.xfs_bmbt_key*eax + 0] ; hi |
||
2637 | mov eax, [ebx + sizeof.xfs_bmbt_key*eax + 4] ; hi |
||
2638 | bswap edx |
||
2639 | bswap eax |
||
2640 | stdcall xfs_btree_read, eax, edx, 0 |
||
2641 | test eax, eax |
||
2642 | jnz .error |
||
2643 | jmp .root.next_key |
||
2644 | |||
2645 | .not_root: |
||
2646 | DEBUGF 1,".root.not_root\n" |
||
2647 | mov eax, [esp + 24] ; block_lo |
||
2648 | mov edx, [esp + 28] ; block_hi |
||
2649 | mov ebx, [ebp + XFS.cur_block] |
||
2650 | stdcall xfs_read_block |
||
2651 | test eax, eax |
||
2652 | jnz .error |
||
2653 | mov ebx, [ebp + XFS.cur_block] |
||
2654 | |||
2655 | cmp [ebx + xfs_bmbt_block.bb_magic], XFS_BMAP_MAGIC |
||
2656 | jne .error |
||
2657 | cmp [ebx + xfs_bmbt_block.bb_level], 0 ; leaf? |
||
2658 | je .leaf |
||
2659 | jmp .node |
||
2660 | |||
2661 | .node: |
||
2662 | ; mov eax, [ebp + XFS.blocksize] |
||
2663 | ; sub eax, sizeof.xfs_bmbt_block |
||
2664 | ; shr eax, 4 ; maxnumrecs |
||
2665 | mov eax, dword[ebp + XFS.file_offset + 0] ; lo |
||
2666 | mov edx, dword[ebp + XFS.file_offset + 4] ; hi |
||
2667 | movzx edx, [ebx + xfs_bmbt_block.bb_numrecs] |
||
2668 | xchg dl, dh |
||
2669 | dec edx |
||
2670 | add ebx, sizeof.xfs_bmbt_block |
||
2671 | xor eax, eax |
||
2672 | dec eax |
||
2673 | .node.next_key: |
||
2674 | push eax ecx edx esi edi |
||
2675 | mov eax, [esp + 44] ; block_lo |
||
2676 | mov edx, [esp + 48] ; block_hi |
||
2677 | mov ebx, [ebp + XFS.cur_block] |
||
2678 | stdcall xfs_read_block |
||
2679 | test eax, eax |
||
2680 | jnz .error |
||
2681 | mov ebx, [ebp + XFS.cur_block] |
||
2682 | add ebx, sizeof.xfs_bmbt_block |
||
2683 | pop edi esi edx ecx eax |
||
2684 | cmp [ebp + XFS.bytes_to_read], 0 |
||
2685 | je .quit |
||
2686 | inc eax |
||
2687 | cmp eax, edx ; out of keys? |
||
2688 | ja .node.key_found ; there is no length field, so try the last key |
||
2689 | lea edi, [ebx + sizeof.xfs_bmbt_key*eax + 0] |
||
2690 | lea esi, [ebx + sizeof.xfs_bmbt_key*eax + 4] |
||
2691 | bswap edi |
||
2692 | bswap esi |
||
2693 | mov ecx, [ebp + XFS.blocklog] |
||
2694 | shld edi, esi, cl |
||
2695 | shl esi, cl |
||
2696 | cmp edi, dword[ebp + XFS.file_offset + 4] |
||
2697 | ja .node.prev_or_hole |
||
2698 | jb .node.next_key |
||
2699 | cmp esi, dword[ebp + XFS.file_offset + 0] |
||
2700 | ja .node.prev_or_hole |
||
2701 | jb .node.next_key |
||
2702 | jmp .node.key_found |
||
2703 | .node.prev_or_hole: |
||
2704 | test eax, eax |
||
2705 | jz .node.hole |
||
2706 | dec eax |
||
2707 | jmp .node.key_found |
||
2708 | .node.hole: |
||
2709 | push eax edx esi edi |
||
2710 | mov ecx, [ebp + XFS.blocklog] |
||
2711 | shld edi, esi, cl |
||
2712 | shl esi, cl |
||
2713 | sub esi, dword[ebp + XFS.file_offset + 0] |
||
2714 | sbb edi, dword[ebp + XFS.file_offset + 4] |
||
2715 | mov ecx, [ebp + XFS.bytes_to_read] |
||
2716 | cmp edi, 0 ; hole size >= 2^32 |
||
2717 | jne @f |
||
2718 | cmp ecx, esi |
||
2719 | jbe @f |
||
2720 | mov ecx, esi |
||
2721 | @@: |
||
2722 | add dword[ebp + XFS.file_offset + 0], ecx |
||
2723 | adc dword[ebp + XFS.file_offset + 4], 0 |
||
2724 | sub [ebp + XFS.bytes_to_read], ecx |
||
2725 | xor eax, eax |
||
2726 | mov edi, [ebp + XFS.buffer_pos] |
||
2727 | rep stosb |
||
2728 | mov [ebp + XFS.buffer_pos], edi |
||
2729 | pop edi esi edx eax |
||
2730 | jmp .node.next_key |
||
2731 | .node.key_found: |
||
2732 | mov edx, [ebp + XFS.cur_inode_save] |
||
2733 | mov eax, [ebp + XFS.inodesize] |
||
2734 | sub eax, xfs_inode.di_u |
||
2735 | cmp [edx + xfs_inode.di_core.di_forkoff], 0 |
||
2736 | je @f |
||
2737 | movzx eax, [edx + xfs_inode.di_core.di_forkoff] |
||
2738 | shl eax, XFS_DIR2_DATA_ALIGN_LOG ; 3 |
||
2739 | @@: |
||
2740 | sub eax, sizeof.xfs_bmdr_block |
||
2741 | shr eax, 4 ;log2(sizeof.xfs_bmbt_key + sizeof.xfs_bmdr_ptr) |
||
2742 | mov edx, [ebx + sizeof.xfs_bmbt_key*eax + 0] ; hi |
||
2743 | mov eax, [ebx + sizeof.xfs_bmbt_key*eax + 4] ; hi |
||
2744 | bswap edx |
||
2745 | bswap eax |
||
2746 | stdcall xfs_btree_read, eax, edx, 0 |
||
2747 | test eax, eax |
||
2748 | jnz .error |
||
2749 | jmp .node.next_key |
||
2750 | jmp .quit |
||
2751 | |||
2752 | .leaf: |
||
2753 | |||
2754 | jmp .quit |
||
2755 | |||
2756 | .error: |
||
2757 | pop edi esi edx ecx ebx |
||
2758 | movi eax, ERROR_FS_FAIL |
||
2759 | ret 4 |
||
2760 | .quit: |
||
2761 | pop edi esi edx ecx ebx |
||
2762 | xor eax, eax |
||
2763 | ret 4 |
||
2764 | |||
2765 | |||
2766 | ;---------------------------------------------------------------- |
||
2767 | ; push nextents |
||
2768 | ; push extent_list |
||
2769 | ; push file_offset_hi |
||
2770 | ; push file_offset_lo |
||
2771 | ;---------------------------------------------------------------- |
||
2772 | ;xfs_extent_list_read: |
||
2773 | ; push ebx 0 edx esi edi ; zero means actually_read_bytes |
||
2774 | ; |
||
2775 | ; .quit: |
||
2776 | ; pop edi esi edx ecx ebx |
||
2777 | ; xor eax, eax |
||
2778 | ; ret 24 |
||
2779 | ; .error: |
||
2780 | ; pop edi esi edx ecx ebx |
||
2781 | ; ret 24>> |