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Rev | Author | Line No. | Line |
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1378 | turbanoff | 1 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
2 | ;; ;; |
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2455 | mario79 | 3 | ;; Copyright (C) KolibriOS team 2004-2012. All rights reserved. ;; |
1378 | turbanoff | 4 | ;; Distributed under terms of the GNU General Public License ;; |
1384 | turbanoff | 5 | ;; 02.02.2010 turbanoff - support 70.5 ;; |
6 | ;; 23.01.2010 turbanoff - support 70.0 70.1 ;; |
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1378 | turbanoff | 7 | ;; ;; |
8 | ;; ;; |
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9 | ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;; |
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10 | |||
11 | $Revision: 3403 $ |
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12 | |||
2889 | turbanoff | 13 | EXT2_BAD_INO = 1 |
1378 | turbanoff | 14 | EXT2_ROOT_INO = 2 |
2889 | turbanoff | 15 | EXT2_ACL_IDX_INO = 3 |
1378 | turbanoff | 16 | EXT2_ACL_DATA_INO = 4 |
2889 | turbanoff | 17 | EXT2_BOOT_LOADER_INO = 5 |
18 | EXT2_UNDEL_DIR_INO = 6 |
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1378 | turbanoff | 19 | |
2889 | turbanoff | 20 | ;флаги, указываемый в inode файла |
21 | EXT2_S_IFREG = 0x8000 |
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22 | EXT2_S_IFDIR = 0x4000 |
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2973 | turbanoff | 23 | EXT2_S_IFMT = 0xF000 ;маска для типа файла |
1378 | turbanoff | 24 | |
2889 | turbanoff | 25 | ;флаги, указываемые в linked list родительской папки |
26 | EXT2_FT_REG_FILE = 1 ;это файл, запись в родительском каталоге |
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27 | EXT2_FT_DIR = 2 ;это папка |
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1378 | turbanoff | 28 | |
2889 | turbanoff | 29 | ;флаги используемые KolibriOS |
30 | FS_FT_HIDDEN = 2 |
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31 | FS_FT_DIR = 0x10 ;это папка |
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32 | FS_FT_ASCII = 0 ;имя в ascii |
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33 | FS_FT_UNICODE = 1 ;имя в unicode |
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1378 | turbanoff | 34 | |
2889 | turbanoff | 35 | EXT2_FEATURE_INCOMPAT_FILETYPE = 0x0002 ;тип файла должен указываться в директории |
36 | EXT4_FEATURE_INCOMPAT_EXTENTS = 0x0040 ;экстенты |
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37 | EXT4_FEATURE_INCOMPAT_FLEX_BG = 0x0200 ;гибкие группы блоков |
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38 | ;реализованные ext[234] features |
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39 | EXT4_FEATURE_INCOMPAT_SUPP = EXT2_FEATURE_INCOMPAT_FILETYPE \ |
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40 | or EXT4_FEATURE_INCOMPAT_EXTENTS \ |
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41 | or EXT4_FEATURE_INCOMPAT_FLEX_BG |
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1410 | turbanoff | 42 | |
1397 | turbanoff | 43 | |
2889 | turbanoff | 44 | ;флаги, указываемые для inode в i_flags |
45 | EXT2_EXTENTS_FL = 0x00080000 |
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46 | |||
2381 | hidnplayr | 47 | struct EXT2_INODE_STRUC |
48 | i_mode dw ? |
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49 | i_uid dw ? |
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50 | i_size dd ? |
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51 | i_atime dd ? |
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52 | i_ctime dd ? |
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53 | i_mtime dd ? |
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54 | i_dtime dd ? |
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55 | i_gid dw ? |
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56 | i_links_count dw ? |
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57 | i_blocks dd ? |
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58 | i_flags dd ? |
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59 | i_osd1 dd ? |
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60 | i_block rd 15 |
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61 | i_generation dd ? |
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62 | i_file_acl dd ? |
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63 | i_dir_acl dd ? |
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64 | i_faddr dd ? |
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65 | i_osd2 dd ? ; 1..12 |
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1378 | turbanoff | 66 | ends |
67 | |||
2381 | hidnplayr | 68 | struct EXT2_DIR_STRUC |
69 | inode dd ? |
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70 | rec_len dw ? |
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71 | name_len db ? |
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72 | file_type db ? |
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73 | name db ? ; 0..255 |
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1378 | turbanoff | 74 | ends |
75 | |||
2381 | hidnplayr | 76 | struct EXT2_BLOCK_GROUP_DESC |
2889 | turbanoff | 77 | block_bitmap dd ? ;+0 |
78 | inode_bitmap dd ? ;+4 |
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79 | inode_table dd ? ;+8 |
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80 | free_blocks_count dw ? ;+12 |
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81 | free_inodes_count dw ? ;+14 |
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82 | used_dirs_count dw ? ;+16 |
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83 | pad dw ? ;+18 |
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84 | reserved rb 12;+20 |
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1419 | turbanoff | 85 | ends |
1378 | turbanoff | 86 | |
2381 | hidnplayr | 87 | struct EXT2_SB_STRUC |
88 | inodes_count dd ? ;+0 |
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89 | blocks_count dd ? ;+4 |
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90 | r_block_count dd ? ;+8 |
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91 | free_block_count dd ? ;+12 |
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92 | free_inodes_count dd ? ;+16 |
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93 | first_data_block dd ? ;+20 |
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94 | log_block_size dd ? ;+24 |
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95 | log_frag_size dd ? ;+28 |
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96 | blocks_per_group dd ? ;+32 |
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97 | frags_per_group dd ? ;+36 |
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98 | inodes_per_group dd ? ;+40 |
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99 | mtime dd ? ;+44 |
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100 | wtime dd ? ;+48 |
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101 | mnt_count dw ? ;+52 |
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102 | max_mnt_count dw ? ;+54 |
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103 | magic dw ? ;+56 |
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104 | state dw ? ;+58 |
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105 | errors dw ? ;+60 |
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106 | minor_rev_level dw ? ;+62 |
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107 | lastcheck dd ? ;+64 |
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108 | check_intervals dd ? ;+68 |
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109 | creator_os dd ? ;+72 |
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110 | rev_level dd ? ;+76 |
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111 | def_resuid dw ? ;+80 |
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112 | def_resgid dw ? ;+82 |
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113 | first_ino dd ? ;+84 |
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114 | inode_size dw ? ;+88 |
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115 | block_group_nr dw ? ;+90 |
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116 | feature_compat dd ? ;+92 |
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117 | feature_incompat dd ? ;+96 |
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118 | feature_ro_compat dd ? ;+100 |
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119 | uuid rb 16 ;+104 |
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120 | volume_name rb 16 ;+120 |
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121 | last_mounted rb 64 ;+136 |
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122 | algo_bitmap dd ? ;+200 |
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123 | prealloc_blocks db ? ;+204 |
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124 | preallock_dir_blocks db ? ;+205 |
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2889 | turbanoff | 125 | reserved_gdt_blocks dw ? ;+206 |
2381 | hidnplayr | 126 | journal_uuid rb 16 ;+208 |
127 | journal_inum dd ? ;+224 |
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128 | journal_dev dd ? ;+228 |
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129 | last_orphan dd ? ;+232 |
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130 | hash_seed rd 4 ;+236 |
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131 | def_hash_version db ? ;+252 |
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132 | rb 3 ;+253 reserved |
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133 | default_mount_options dd ? ;+256 |
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134 | first_meta_bg dd ? ;+260 |
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2889 | turbanoff | 135 | mkfs_time dd ? ;+264 |
136 | jnl_blocks rd 17 ;+268 |
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137 | blocks_count_hi dd ? ;+336 |
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138 | r_blocks_count_hi dd ? ;+340 |
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139 | free_blocks_count_hi dd ? ;+344 |
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140 | min_extra_isize dw ? ;+348 |
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141 | want_extra_isize dw ? ;+350 |
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142 | flags dd ? ;+352 |
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143 | raid_stride dw ? ;+356 |
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144 | mmp_interval dw ? ;+358 |
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145 | mmp_block dq ? ;+360 |
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146 | raid_stripe_width dd ? ;+368 |
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147 | log_groups_per_flex db ? ;+372 |
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1419 | turbanoff | 148 | ends |
149 | |||
2889 | turbanoff | 150 | struct EXT4_EXTENT_HEADER ;заголовок блока экстентов/индексов |
151 | eh_magic dw ? ;в текущей реализации ext4 должно быть 0xF30A |
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152 | eh_entries dw ? ;количество экстентов/индексов в блоке |
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153 | eh_max dw ? ;max количество (используется при записи) |
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154 | eh_depth dw ? ;глубина дерева (0, если это блок экстентов) |
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155 | eh_generation dd ? ;??? |
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156 | ends |
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157 | |||
158 | struct EXT4_EXTENT ;экстент |
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159 | ee_block dd ? ;номер ext4 блока |
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160 | ee_len dw ? ;длина экстента |
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161 | ee_start_hi dw ? ;старшие 16 бит 48-битного адреса (пока не используются в KOS) |
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162 | ee_start_lo dd ? ;младшие 32 бита 48-битного адреса |
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163 | ends |
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164 | |||
165 | struct EXT4_EXTENT_IDX ;индес - указатель на блок с экстентами/индексами |
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166 | ei_block dd ? ;номер ext4 блока |
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167 | ei_leaf_lo dd ? ;младшие 32 бит 48-битного адреса |
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168 | ei_leaf_hi dw ? ;старшие 16 бит 48-битного адреса (пока не используются в KOS) |
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169 | ei_unused dw ? ;зарезервировано |
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170 | ends |
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171 | |||
1378 | turbanoff | 172 | ext2_test_superblock: |
1410 | turbanoff | 173 | cmp [fs_type], 0x83 |
174 | jne .no |
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175 | |||
1378 | turbanoff | 176 | mov eax, [PARTITION_START] |
177 | add eax, 2 ;superblock start at 1024b |
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178 | call hd_read |
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179 | |||
2889 | turbanoff | 180 | cmp [ebx + EXT2_SB_STRUC.log_block_size], 3 ;0,1,2,3 |
1378 | turbanoff | 181 | ja .no |
2889 | turbanoff | 182 | cmp [ebx + EXT2_SB_STRUC.magic], 0xEF53 |
1378 | turbanoff | 183 | jne .no |
2889 | turbanoff | 184 | cmp [ebx + EXT2_SB_STRUC.state], 1 ;EXT_VALID_FS=1 |
1378 | turbanoff | 185 | jne .no |
2889 | turbanoff | 186 | cmp [ebx + EXT2_SB_STRUC.inodes_per_group], 0 |
187 | je .no |
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188 | |||
189 | mov eax, [ebx + EXT2_SB_STRUC.feature_incompat] |
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1410 | turbanoff | 190 | test eax, EXT2_FEATURE_INCOMPAT_FILETYPE |
191 | jz .no |
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2889 | turbanoff | 192 | test eax, not EXT4_FEATURE_INCOMPAT_SUPP |
1410 | turbanoff | 193 | jnz .no |
1378 | turbanoff | 194 | |
195 | ; OK, this is correct EXT2 superblock |
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196 | clc |
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197 | ret |
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198 | .no: |
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199 | ; No, this superblock isn't EXT2 |
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200 | stc |
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201 | ret |
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202 | |||
203 | ext2_setup: |
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204 | mov [fs_type], 2 |
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1419 | turbanoff | 205 | |
206 | push 512 |
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207 | call kernel_alloc ; mem for superblock |
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208 | mov esi, ebx |
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209 | mov edi, eax |
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210 | mov ecx, 512/4 |
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2288 | clevermous | 211 | rep movsd ; copy sb to reserved mem |
1419 | turbanoff | 212 | mov ebx, eax |
2288 | clevermous | 213 | mov [ext2_data.sb], eax |
1419 | turbanoff | 214 | |
215 | mov eax, [ebx + EXT2_SB_STRUC.blocks_count] |
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216 | sub eax, [ebx + EXT2_SB_STRUC.first_data_block] |
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217 | dec eax |
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218 | xor edx, edx |
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219 | div [ebx + EXT2_SB_STRUC.blocks_per_group] |
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220 | inc eax |
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221 | mov [ext2_data.groups_count], eax |
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222 | |||
2889 | turbanoff | 223 | mov ecx, [ebx + EXT2_SB_STRUC.log_block_size] |
1378 | turbanoff | 224 | inc ecx |
225 | mov [ext2_data.log_block_size], ecx ; 1, 2, 3, 4 equ 1kb, 2kb, 4kb, 8kb |
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226 | |||
227 | mov eax, 1 |
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228 | shl eax, cl |
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229 | mov [ext2_data.count_block_in_block], eax |
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230 | |||
231 | shl eax, 7 |
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232 | mov [ext2_data.count_pointer_in_block], eax |
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233 | mov edx, eax ; потом еще квадрат найдем |
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234 | |||
235 | shl eax, 2 |
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236 | mov [ext2_data.block_size], eax |
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237 | |||
1419 | turbanoff | 238 | push eax eax ; 2 kernel_alloc |
1378 | turbanoff | 239 | |
240 | mov eax, edx |
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241 | mul edx |
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242 | mov [ext2_data.count_pointer_in_block_square], eax |
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243 | |||
244 | call kernel_alloc |
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245 | mov [ext2_data.ext2_save_block], eax ; and for temp block |
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246 | call kernel_alloc |
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247 | mov [ext2_data.ext2_temp_block], eax ; and for get_inode proc |
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248 | |||
2889 | turbanoff | 249 | movzx ebp, word [ebx + EXT2_SB_STRUC.inode_size] |
250 | mov ecx, [ebx + EXT2_SB_STRUC.blocks_per_group] |
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1378 | turbanoff | 251 | |
252 | mov [ext2_data.inode_size], ebp |
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253 | mov [ext2_data.blocks_per_group], ecx |
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254 | |||
255 | push ebp ebp ebp ;3 kernel_alloc |
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256 | call kernel_alloc |
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257 | mov [ext2_data.ext2_save_inode], eax |
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258 | call kernel_alloc |
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259 | mov [ext2_data.ext2_temp_inode], eax |
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260 | call kernel_alloc |
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261 | mov [ext2_data.root_inode], eax |
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262 | |||
263 | mov ebx, eax |
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264 | mov eax, EXT2_ROOT_INO |
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265 | call ext2_get_inode ; read root inode |
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1419 | turbanoff | 266 | |
2288 | clevermous | 267 | jmp return_from_part_set |
1378 | turbanoff | 268 | |
269 | ;================================================================== |
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2889 | turbanoff | 270 | ;read ext2 block form FS to memory |
271 | ;in: eax = i_block (address of block in ext2 terms) |
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272 | ; ebx = pointer to return memory |
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273 | ;out: eax - error code (0 = no_error) |
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1378 | turbanoff | 274 | ext2_get_block: |
2889 | turbanoff | 275 | push ebx ecx |
1378 | turbanoff | 276 | mov ecx, [ext2_data.log_block_size] |
277 | shl eax, cl |
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278 | add eax, [PARTITION_START] |
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279 | mov ecx, [ext2_data.count_block_in_block] |
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280 | @@: |
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281 | call hd_read |
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2889 | turbanoff | 282 | cmp [hd_error], 0 |
283 | jnz .fail |
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1378 | turbanoff | 284 | inc eax |
285 | add ebx, 512 |
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286 | loop @B |
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2889 | turbanoff | 287 | xor eax, eax |
288 | @@: |
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289 | pop ecx ebx |
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1378 | turbanoff | 290 | ret |
2889 | turbanoff | 291 | .fail: |
292 | mov eax, ERROR_DEVICE |
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293 | jmp @B |
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294 | |||
295 | |||
1378 | turbanoff | 296 | ;=================================================================== |
2889 | turbanoff | 297 | ;получает номер блока из extent inode |
298 | ;in: ecx = номер блока по порядку |
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299 | ; ebp = адрес extent header`а |
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300 | ;out: ecx - адрес очередного блока в случае успеха |
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301 | ; eax - номер ошибки (если равно 0, то ошибки нет) |
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302 | ext4_block_recursive_search: |
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303 | cmp word [ebp + EXT4_EXTENT_HEADER.eh_magic], 0xF30A ;EXT4_EXT_MAGIC |
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304 | jne .fail |
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305 | |||
306 | movzx ebx, [ebp + EXT4_EXTENT_HEADER.eh_entries] |
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307 | add ebp, sizeof.EXT4_EXTENT_HEADER |
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308 | cmp word [ebp - sizeof.EXT4_EXTENT_HEADER + EXT4_EXTENT_HEADER.eh_depth], 0 |
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309 | je .leaf_block ;листовой ли это блок? |
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310 | |||
311 | ;не листовой блок, а индексный ; eax - ext4_extent_idx |
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312 | test ebx, ebx |
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313 | jz .fail ;пустой индексный блок -> ошибка |
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314 | |||
315 | ;цикл по индексам экстентов |
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316 | @@: |
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317 | cmp ebx, 1 ;у индексов не хранится длина, |
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318 | je .end_search_index ;поэтому, если остался последний - то это нужный |
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319 | |||
320 | cmp ecx, [ebp + EXT4_EXTENT_IDX.ei_block] |
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321 | jb .fail |
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322 | |||
323 | cmp ecx, [ebp + sizeof.EXT4_EXTENT_IDX + EXT4_EXTENT_IDX.ei_block] ;блок слeдующего индекса |
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324 | jb .end_search_index ;следующий дальше - значит текущий, то что нам нужен |
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325 | |||
326 | add ebp, sizeof.EXT4_EXTENT_IDX |
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327 | dec ebx |
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328 | jmp @B |
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329 | |||
330 | .end_search_index: |
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331 | ;ebp указывает на нужный extent_idx, считываем следующий блок |
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332 | mov ebx, [ext2_data.ext2_temp_block] |
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333 | mov eax, [ebp + EXT4_EXTENT_IDX.ei_leaf_lo] |
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334 | call ext2_get_block |
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335 | test eax, eax |
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336 | jnz .fail |
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337 | mov ebp, ebx |
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338 | jmp ext4_block_recursive_search ;рекурсивно прыгаем в начало |
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339 | |||
340 | .leaf_block: ;листовой блок ebp - ext4_extent |
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341 | ;цикл по экстентам |
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342 | @@: |
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343 | test ebx, ebx |
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344 | jz .fail ;ни один узел не подошел - ошибка |
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345 | |||
346 | mov edx, [ebp + EXT4_EXTENT.ee_block] |
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347 | cmp ecx, edx |
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348 | jb .fail ;если меньше, значит он был в предыдущих блоках -> ошибка |
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349 | |||
350 | movzx edi, [ebp + EXT4_EXTENT.ee_len] |
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351 | add edx, edi |
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352 | cmp ecx, edx |
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353 | jb .end_search_extent ;нашли нужный блок |
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354 | |||
355 | add ebp, sizeof.EXT4_EXTENT |
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356 | dec ebx |
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357 | jmp @B |
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358 | |||
359 | .end_search_extent: |
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360 | mov edx, [ebp + EXT4_EXTENT.ee_start_lo] |
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361 | sub ecx, [ebp + EXT4_EXTENT.ee_block] ;разница в ext4 блоках |
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362 | add ecx, edx |
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363 | xor eax, eax |
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364 | ret |
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365 | |||
366 | .fail: |
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367 | mov eax, ERROR_FS_FAIL |
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368 | ret |
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369 | |||
370 | ;=================================================================== |
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371 | ;получает адрес ext2 блока из inode с определнным номером |
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372 | ;in: ecx = номер блока в inode (0..) |
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373 | ; ebp = адрес inode |
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374 | ;out: ecx = адрес очередного блока |
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375 | ; eax - error code |
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1378 | turbanoff | 376 | ext2_get_inode_block: |
2889 | turbanoff | 377 | test [ebp + EXT2_INODE_STRUC.i_flags], EXT2_EXTENTS_FL |
378 | jz @F |
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379 | |||
380 | pushad |
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381 | add ebp, EXT2_INODE_STRUC.i_block ;ebp - extent_header |
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382 | call ext4_block_recursive_search |
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383 | mov PUSHAD_ECX, ecx |
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384 | mov PUSHAD_EAX, eax |
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385 | popad |
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386 | ret |
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387 | |||
388 | @@: |
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1387 | turbanoff | 389 | cmp ecx, 12 ; 0..11 - direct block address |
390 | jb .get_direct_block |
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1378 | turbanoff | 391 | |
392 | sub ecx, 12 |
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2889 | turbanoff | 393 | cmp ecx, [ext2_data.count_pointer_in_block] ; 12.. - indirect blocks |
1387 | turbanoff | 394 | jb .get_indirect_block |
1378 | turbanoff | 395 | |
396 | sub ecx, [ext2_data.count_pointer_in_block] |
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397 | cmp ecx, [ext2_data.count_pointer_in_block_square] |
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1387 | turbanoff | 398 | jb .get_double_indirect_block |
1378 | turbanoff | 399 | |
1387 | turbanoff | 400 | sub ecx, [ext2_data.count_pointer_in_block_square] |
2889 | turbanoff | 401 | ;triple indirect block |
402 | push edx ebx |
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1378 | turbanoff | 403 | |
2288 | clevermous | 404 | mov eax, [ebx + EXT2_INODE_STRUC.i_block + 14*4] |
405 | mov ebx, [ext2_data.ext2_temp_block] |
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1378 | turbanoff | 406 | call ext2_get_block |
2889 | turbanoff | 407 | test eax, eax |
408 | jnz .fail |
||
1378 | turbanoff | 409 | |
410 | xor edx, edx |
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411 | mov eax, ecx |
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412 | div [ext2_data.count_pointer_in_block_square] |
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413 | |||
414 | ;eax - номер в полученном блоке edx - номер дальше |
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2288 | clevermous | 415 | mov eax, [ebx + eax*4] |
416 | call ext2_get_block |
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2889 | turbanoff | 417 | test eax, eax |
418 | jnz .fail |
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1378 | turbanoff | 419 | |
2288 | clevermous | 420 | mov eax, edx |
421 | jmp @F |
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1378 | turbanoff | 422 | |
423 | .get_double_indirect_block: |
||
2889 | turbanoff | 424 | push edx ebx |
1378 | turbanoff | 425 | |
426 | mov eax, [ebp + EXT2_INODE_STRUC.i_block + 13*4] |
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427 | mov ebx, [ext2_data.ext2_temp_block] |
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428 | call ext2_get_block |
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2889 | turbanoff | 429 | test eax, eax |
430 | jnz .fail |
||
1378 | turbanoff | 431 | |
432 | mov eax, ecx |
||
2889 | turbanoff | 433 | @@: |
1378 | turbanoff | 434 | xor edx, edx |
435 | div [ext2_data.count_pointer_in_block] |
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436 | |||
2288 | clevermous | 437 | mov eax, [ebx + eax*4] |
1378 | turbanoff | 438 | call ext2_get_block |
2889 | turbanoff | 439 | test eax, eax |
440 | jnz .fail |
||
441 | |||
2288 | clevermous | 442 | mov ecx, [ebx + edx*4] |
2889 | turbanoff | 443 | .fail: |
444 | pop ebx edx |
||
1378 | turbanoff | 445 | ret |
446 | |||
447 | .get_indirect_block: |
||
2889 | turbanoff | 448 | push ebx |
1378 | turbanoff | 449 | mov eax, [ebp + EXT2_INODE_STRUC.i_block + 12*4] |
1387 | turbanoff | 450 | mov ebx, [ext2_data.ext2_temp_block] |
1378 | turbanoff | 451 | call ext2_get_block |
2889 | turbanoff | 452 | test eax, eax |
3317 | turbanoff | 453 | jnz @F ;если не было ошибки |
1378 | turbanoff | 454 | |
2889 | turbanoff | 455 | mov ecx, [ebx + ecx*4] ;заносим результат |
456 | @@: |
||
457 | pop ebx |
||
1378 | turbanoff | 458 | ret |
459 | |||
460 | .get_direct_block: |
||
2889 | turbanoff | 461 | mov ecx, [ebp + EXT2_INODE_STRUC.i_block + ecx*4] |
462 | xor eax, eax |
||
1378 | turbanoff | 463 | ret |
464 | |||
465 | ;=================================================================== |
||
466 | ;get content inode by num |
||
2889 | turbanoff | 467 | ;in: eax = inode_num |
468 | ; ebx = address of inode content |
||
469 | ;out: eax - error code |
||
1378 | turbanoff | 470 | ext2_get_inode: |
2288 | clevermous | 471 | pushad |
472 | mov edi, ebx ;сохраним адрес inode |
||
473 | dec eax |
||
474 | xor edx, edx |
||
2889 | turbanoff | 475 | |
476 | mov ecx, [ext2_data.sb] |
||
477 | div [ecx + EXT2_SB_STRUC.inodes_per_group] |
||
1378 | turbanoff | 478 | |
1419 | turbanoff | 479 | push edx ;locale num in group |
1378 | turbanoff | 480 | |
481 | mov edx, 32 |
||
482 | mul edx ; address block_group in global_desc_table |
||
483 | |||
1419 | turbanoff | 484 | ; в eax - смещение группы с inode-ом относительно начала глобальной дескрипторной таблицы |
485 | ; найдем блок в котором он находится |
||
486 | div [ext2_data.block_size] |
||
487 | add eax, [ecx + EXT2_SB_STRUC.first_data_block] |
||
488 | inc eax |
||
489 | mov ebx, [ext2_data.ext2_temp_block] |
||
490 | call ext2_get_block |
||
2889 | turbanoff | 491 | test eax, eax |
492 | jnz .fail |
||
1419 | turbanoff | 493 | |
494 | add ebx, edx ; локальный номер в блоке |
||
2889 | turbanoff | 495 | mov eax, [ebx + EXT2_BLOCK_GROUP_DESC.inode_table]; номер блока - в терминах ext2 |
1419 | turbanoff | 496 | |
1378 | turbanoff | 497 | mov ecx, [ext2_data.log_block_size] |
498 | shl eax, cl |
||
2889 | turbanoff | 499 | add eax, [PARTITION_START] ; а старт раздела - в терминах hdd (512) |
1378 | turbanoff | 500 | |
501 | ;eax - указывает на таблицу inode-ов на hdd |
||
1410 | turbanoff | 502 | mov esi, eax ;сохраним его пока в esi |
1378 | turbanoff | 503 | |
504 | ; прибавим локальный адрес inode-а |
||
505 | pop eax ; index |
||
1410 | turbanoff | 506 | mov ecx, [ext2_data.inode_size] |
507 | mul ecx ; (index * inode_size) |
||
1378 | turbanoff | 508 | mov ebp, 512 |
509 | div ebp ;поделим на размер блока |
||
510 | |||
1410 | turbanoff | 511 | add eax, esi ;нашли адрес блока для чтения |
1378 | turbanoff | 512 | mov ebx, [ext2_data.ext2_temp_block] |
513 | call hd_read |
||
2889 | turbanoff | 514 | cmp [hd_error], 0 |
515 | jnz .fail |
||
1378 | turbanoff | 516 | |
517 | mov esi, edx ;добавим "остаток" |
||
518 | add esi, ebx ;к адресу |
||
2288 | clevermous | 519 | rep movsb ;копируем inode |
2889 | turbanoff | 520 | xor eax, eax |
521 | .fail: |
||
522 | mov PUSHAD_EAX, eax |
||
1378 | turbanoff | 523 | popad |
524 | ret |
||
525 | |||
526 | ;---------------------------------------------------------------- |
||
527 | ; |
||
528 | ; ext2_HdReadFolder - read disk folder |
||
529 | ; |
||
530 | ; esi points to filename |
||
531 | ; ebx pointer to structure 32-bit number = first wanted block, 0+ |
||
532 | ; & flags (bitfields) |
||
533 | ; flags: bit 0: 0=ANSI names, 1=UNICODE names |
||
534 | ; ecx number of blocks to read, 0+ |
||
535 | ; edx mem location to return data |
||
536 | ; |
||
537 | ; ret ebx = blocks read or 0xffffffff folder not found |
||
538 | ; eax = 0 ok read or other = errormsg |
||
539 | ; |
||
540 | ;-------------------------------------------------------------- |
||
541 | ext2_HdReadFolder: |
||
542 | cmp byte [esi], 0 |
||
2889 | turbanoff | 543 | jz .root_folder |
1378 | turbanoff | 544 | |
2889 | turbanoff | 545 | push ebx ecx edx |
546 | call ext2_find_lfn ;вернет в ebp адрес inode |
||
547 | pop edx ecx ebx |
||
548 | test eax, eax |
||
549 | jnz .error_ret |
||
550 | test [ebp + EXT2_INODE_STRUC.i_mode], EXT2_S_IFDIR |
||
551 | jz .error_not_found |
||
552 | jmp @F |
||
1387 | turbanoff | 553 | |
2889 | turbanoff | 554 | .root_folder: |
1387 | turbanoff | 555 | mov ebp, [ext2_data.root_inode] |
2889 | turbanoff | 556 | test [ebp + EXT2_INODE_STRUC.i_mode], EXT2_S_IFDIR |
557 | jz .error_root |
||
558 | ;придется копировать inode |
||
1387 | turbanoff | 559 | push ecx |
2889 | turbanoff | 560 | mov esi, ebp |
561 | mov edi, [ext2_data.ext2_save_inode] |
||
562 | mov ecx, [ext2_data.inode_size] |
||
563 | shr ecx, 2 |
||
564 | mov ebp, edi |
||
565 | rep movsd |
||
566 | pop ecx |
||
1387 | turbanoff | 567 | @@: |
3403 | turbanoff | 568 | cmp [ebp + EXT2_INODE_STRUC.i_size], 0 ;папка пуста |
2889 | turbanoff | 569 | je .error_empty_dir |
570 | |||
571 | push edx ;адрес результата [edi + 28] |
||
572 | push 0 ;конец очередного блока папки [edi + 24] |
||
573 | push ecx ;сколько файлов нужно прочитать [edi + 20] |
||
574 | push dword [ebx] ;первый "нужный" файл [edi + 16] |
||
575 | push dword [ebx + 4];флаги [edi + 12] |
||
576 | push 0 ;[EXT2_read_in_folder] [edi + 8] |
||
577 | push 0 ;[EXT2_files_in_folder] [edi + 4] |
||
578 | push 0 ;номер блока по порядку [edi] |
||
579 | |||
1387 | turbanoff | 580 | mov edi, edx |
581 | mov ecx, 32/4 |
||
2288 | clevermous | 582 | rep stosd ; fill header zero |
2889 | turbanoff | 583 | |
584 | mov edi, esp ; edi - указатель на локальные переменные |
||
585 | add edx, 32 ; edx = current mem for return |
||
1387 | turbanoff | 586 | |
2889 | turbanoff | 587 | xor ecx, ecx ; получим номер первого блока |
1378 | turbanoff | 588 | call ext2_get_inode_block |
2889 | turbanoff | 589 | test eax, eax |
590 | jnz .error_get_block |
||
1378 | turbanoff | 591 | |
592 | mov eax, ecx |
||
593 | mov ebx, [ext2_data.ext2_save_block] |
||
594 | call ext2_get_block ; и считываем блок с hdd |
||
2889 | turbanoff | 595 | test eax, eax |
596 | jnz .error_get_block |
||
1378 | turbanoff | 597 | |
2889 | turbanoff | 598 | mov esi, ebx ; esi = current dir record |
1378 | turbanoff | 599 | add ebx, [ext2_data.block_size] |
2889 | turbanoff | 600 | mov [edi + 24], ebx ; запомним конец очередного блока |
1378 | turbanoff | 601 | |
2889 | turbanoff | 602 | mov ecx, [edi + 16] ; ecx = first wanted (flags ommited) |
1378 | turbanoff | 603 | |
604 | .find_wanted_start: |
||
2288 | clevermous | 605 | jecxz .find_wanted_end |
1378 | turbanoff | 606 | .find_wanted_cycle: |
2889 | turbanoff | 607 | cmp [esi + EXT2_DIR_STRUC.inode], 0 ; if (inode = 0) => not used |
2288 | clevermous | 608 | jz @F |
2889 | turbanoff | 609 | inc dword [edi + 4] ; EXT2_files_in_folder |
2288 | clevermous | 610 | dec ecx |
2889 | turbanoff | 611 | @@: |
612 | movzx ebx, [esi + EXT2_DIR_STRUC.rec_len] |
||
1419 | turbanoff | 613 | |
2288 | clevermous | 614 | cmp ebx, 12 ; минимальная длина записи |
2889 | turbanoff | 615 | jb .error_bad_len |
2288 | clevermous | 616 | test ebx, 0x3 ; длина записи должна делиться на 4 |
2889 | turbanoff | 617 | jnz .error_bad_len |
1419 | turbanoff | 618 | |
3403 | turbanoff | 619 | sub [ebp + EXT2_INODE_STRUC.i_size], ebx ;вычитаем напрямую из структуры inode |
2889 | turbanoff | 620 | add esi, ebx ; к следующей записи |
621 | cmp esi, [edi + 24] ; сравниваем с концом блока |
||
2288 | clevermous | 622 | jb .find_wanted_start |
1398 | turbanoff | 623 | |
1419 | turbanoff | 624 | push .find_wanted_start |
2889 | turbanoff | 625 | .end_block: ;вылетели из цикла |
3403 | turbanoff | 626 | cmp [ebp + EXT2_INODE_STRUC.i_size], 0 |
2889 | turbanoff | 627 | jle .end_dir |
1398 | turbanoff | 628 | |
2889 | turbanoff | 629 | inc dword [edi] ;получаем новый блок |
1398 | turbanoff | 630 | push ecx |
2889 | turbanoff | 631 | mov ecx, [edi] |
1398 | turbanoff | 632 | call ext2_get_inode_block |
2889 | turbanoff | 633 | test eax, eax |
634 | jnz .error_get_block |
||
635 | |||
1398 | turbanoff | 636 | mov eax, ecx |
637 | mov ebx, [ext2_data.ext2_save_block] |
||
638 | call ext2_get_block |
||
2889 | turbanoff | 639 | test eax, eax |
640 | jnz .error_get_block |
||
641 | |||
1398 | turbanoff | 642 | pop ecx |
2889 | turbanoff | 643 | mov esi, ebx |
1398 | turbanoff | 644 | add ebx, [ext2_data.block_size] |
2889 | turbanoff | 645 | mov [edi + 24], ebx ;запомним конец блока |
646 | ret ; опять в цикл |
||
1398 | turbanoff | 647 | |
1400 | turbanoff | 648 | .wanted_end: |
2889 | turbanoff | 649 | loop .find_wanted_cycle ; ecx 0 => -1 нужно посчитать сколько файлов |
1400 | turbanoff | 650 | |
2889 | turbanoff | 651 | ;дошли до первого "нужного" файла |
1378 | turbanoff | 652 | .find_wanted_end: |
2889 | turbanoff | 653 | mov ecx, [edi + 20] |
654 | .wanted_start: ; ищем first_wanted+count |
||
2288 | clevermous | 655 | jecxz .wanted_end |
2889 | turbanoff | 656 | cmp [esi + EXT2_DIR_STRUC.inode], 0 ; if (inode = 0) => not used |
2288 | clevermous | 657 | jz .empty_rec |
2889 | turbanoff | 658 | inc dword [edi + 8] |
659 | inc dword [edi + 4] |
||
1378 | turbanoff | 660 | |
2889 | turbanoff | 661 | push edi ecx |
662 | mov edi, edx ;обнуляем место под очереное имя файла/папки |
||
2288 | clevermous | 663 | xor eax, eax |
664 | mov ecx, 40 / 4 |
||
665 | rep stosd |
||
2889 | turbanoff | 666 | pop ecx edi |
1378 | turbanoff | 667 | |
2889 | turbanoff | 668 | push esi edi edx |
669 | mov eax, [esi + EXT2_DIR_STRUC.inode] ;получим дочерний inode |
||
2288 | clevermous | 670 | mov ebx, [ext2_data.ext2_temp_inode] |
671 | call ext2_get_inode |
||
2889 | turbanoff | 672 | test eax, eax |
673 | jnz .error_read_subinode |
||
1400 | turbanoff | 674 | |
2288 | clevermous | 675 | lea edi, [edx + 8] |
1400 | turbanoff | 676 | |
2889 | turbanoff | 677 | mov eax, [ebx + EXT2_INODE_STRUC.i_ctime] ; переведем время в ntfs формат |
2288 | clevermous | 678 | xor edx, edx |
679 | add eax, 3054539008 ;(369 * 365 + 89) * 24 * 3600 |
||
680 | adc edx, 2 |
||
681 | call ntfs_datetime_to_bdfe.sec |
||
1400 | turbanoff | 682 | |
2288 | clevermous | 683 | mov eax, [ebx + EXT2_INODE_STRUC.i_atime] |
684 | xor edx, edx |
||
685 | add eax, 3054539008 |
||
686 | adc edx, 2 |
||
687 | call ntfs_datetime_to_bdfe.sec |
||
1400 | turbanoff | 688 | |
2288 | clevermous | 689 | mov eax, [ebx + EXT2_INODE_STRUC.i_mtime] |
690 | xor edx, edx |
||
691 | add eax, 3054539008 |
||
692 | adc edx, 2 |
||
693 | call ntfs_datetime_to_bdfe.sec |
||
1400 | turbanoff | 694 | |
2288 | clevermous | 695 | pop edx ; пока достаем только буфер |
2889 | turbanoff | 696 | test [ebx + EXT2_INODE_STRUC.i_mode], EXT2_S_IFDIR ; для папки размер |
2288 | clevermous | 697 | jnz @F ; не возвращаем |
1400 | turbanoff | 698 | |
2889 | turbanoff | 699 | mov eax, [ebx + EXT2_INODE_STRUC.i_size] ;low size |
2288 | clevermous | 700 | stosd |
2889 | turbanoff | 701 | mov eax, [ebx + EXT2_INODE_STRUC.i_dir_acl] ;high size |
2288 | clevermous | 702 | stosd |
2889 | turbanoff | 703 | xor dword [edx], FS_FT_DIR ;помечаем, что это файл(2 раза xor) |
704 | @@: |
||
705 | xor dword [edx], FS_FT_DIR ;помечаем, что это файл |
||
1400 | turbanoff | 706 | |
2889 | turbanoff | 707 | ;теперь скопируем имя, сконвертировав из UTF-8 в CP866 |
708 | push ecx ;edi и esi уже сохранены в стеке |
||
709 | movzx ecx, [esi + EXT2_DIR_STRUC.name_len] |
||
2288 | clevermous | 710 | lea edi, [edx + 40] |
2889 | turbanoff | 711 | lea esi, [esi + EXT2_DIR_STRUC.name] |
712 | call utf8_to_cp866 |
||
2288 | clevermous | 713 | and byte [edi], 0 |
2889 | turbanoff | 714 | pop ecx edi esi |
1378 | turbanoff | 715 | |
2889 | turbanoff | 716 | cmp byte [edx + 40], '.' ; в linux файл, начинающийся с точки - скрытый |
2288 | clevermous | 717 | jne @F |
718 | or dword [edx], FS_FT_HIDDEN |
||
2889 | turbanoff | 719 | @@: |
1400 | turbanoff | 720 | |
2288 | clevermous | 721 | add edx, 40 + 264 ; go to next record |
722 | dec ecx ; если запись пустая ecx не надо уменьшать |
||
2889 | turbanoff | 723 | .empty_rec: |
724 | movzx ebx, [esi + EXT2_DIR_STRUC.rec_len] |
||
2288 | clevermous | 725 | cmp ebx, 12 ; минимальная длина записи |
2889 | turbanoff | 726 | jb .error_bad_len |
2288 | clevermous | 727 | test ebx, 0x3 ; длина записи должна делиться на 4 |
2889 | turbanoff | 728 | jnz .error_bad_len |
1419 | turbanoff | 729 | |
3403 | turbanoff | 730 | sub [ebp + EXT2_INODE_STRUC.i_size], ebx ;вычитаем напрямую из структуры inode |
2889 | turbanoff | 731 | add esi, ebx |
732 | cmp esi, [edi + 24] ;дошли ли до конца блока? |
||
2288 | clevermous | 733 | jb .wanted_start |
1378 | turbanoff | 734 | |
2889 | turbanoff | 735 | push .wanted_start ; дошли |
1400 | turbanoff | 736 | jmp .end_block |
1378 | turbanoff | 737 | |
2889 | turbanoff | 738 | .end_dir: ;конец папки, когда еще не дошли до нужного файла |
739 | mov edx, [edi + 28] ;адрес структуры результата |
||
740 | mov ebx, [edi + 8] ;EXT2_read_in_folder |
||
741 | mov ecx, [edi + 4] ;EXT2_files_in_folder |
||
1378 | turbanoff | 742 | mov dword [edx], 1 ;version |
2889 | turbanoff | 743 | mov [edx + 4], ebx |
744 | mov [edx + 8], ecx |
||
745 | |||
746 | lea esp, [edi + 32] |
||
747 | |||
748 | xor eax, eax ;зарезервировано: нули в текущей реализации |
||
1378 | turbanoff | 749 | lea edi, [edx + 12] |
750 | mov ecx, 20 / 4 |
||
2288 | clevermous | 751 | rep stosd |
1378 | turbanoff | 752 | ret |
2889 | turbanoff | 753 | |
754 | .error_bad_len: |
||
755 | mov eax, ERROR_FS_FAIL |
||
756 | .error_read_subinode: |
||
757 | .error_get_block: |
||
758 | lea esp, [edi + 32] |
||
759 | .error_ret: |
||
760 | or ebx, -1 |
||
761 | ret |
||
762 | |||
763 | .error_empty_dir: ;inode папки без блоков |
||
764 | .error_root: ;root - не папка |
||
765 | mov eax, ERROR_FS_FAIL |
||
766 | jmp .error_ret |
||
767 | |||
768 | .error_not_found: ;файл не найден |
||
769 | mov eax, ERROR_FILE_NOT_FOUND |
||
770 | jmp .error_ret |
||
771 | |||
772 | ;============================================ |
||
773 | ;convert UTF-8 string to ASCII-string (codepage 866) |
||
774 | ;in: ecx = length source |
||
775 | ; esi = source |
||
776 | ; edi = buffer |
||
1397 | turbanoff | 777 | ; destroys: eax,esi,edi |
2889 | turbanoff | 778 | utf8_to_cp866: |
1397 | turbanoff | 779 | jecxz .ret |
780 | .start: |
||
781 | lodsw |
||
2288 | clevermous | 782 | cmp al, 0x80 |
1397 | turbanoff | 783 | jb .ascii |
1378 | turbanoff | 784 | |
1400 | turbanoff | 785 | xchg al, ah ; big-endian |
1397 | turbanoff | 786 | cmp ax, 0xd080 |
787 | jz .yo1 |
||
788 | cmp ax, 0xd191 |
||
789 | jz .yo2 |
||
790 | cmp ax, 0xd090 |
||
2288 | clevermous | 791 | jb .unk |
792 | cmp ax, 0xd180 |
||
793 | jb .rus1 |
||
794 | cmp ax, 0xd190 |
||
1397 | turbanoff | 795 | jb .rus2 |
796 | .unk: |
||
797 | mov al, '_' |
||
798 | jmp .doit |
||
799 | .yo1: |
||
800 | mov al, 0xf0 ; Ё capital |
||
801 | jmp .doit |
||
802 | .yo2: |
||
803 | mov al, 0xf1 ; ё small |
||
804 | jmp .doit |
||
805 | .rus1: |
||
806 | sub ax, 0xd090 - 0x80 |
||
807 | jmp .doit |
||
808 | .rus2: |
||
809 | sub ax, 0xd18f - 0xEF |
||
810 | .doit: |
||
811 | stosb |
||
812 | sub ecx, 2 |
||
813 | ja .start |
||
814 | ret |
||
815 | |||
816 | .ascii: |
||
817 | stosb |
||
818 | dec esi |
||
819 | dec ecx |
||
820 | jnz .start |
||
821 | .ret: |
||
822 | ret |
||
823 | |||
2288 | clevermous | 824 | ;---------------------------------------------------------------- |
825 | ; |
||
826 | ; ext2_HdRead - read hard disk |
||
827 | ; |
||
828 | ; esi points to filename |
||
829 | ; ebx pointer to 64-bit number = first wanted byte, 0+ |
||
830 | ; may be ebx=0 - start from first byte |
||
831 | ; ecx number of bytes to read, 0+ |
||
832 | ; edx mem location to return data |
||
833 | ; |
||
834 | ; ret ebx = bytes read or 0xffffffff file not found |
||
835 | ; eax = 0 ok read or other = errormsg |
||
2889 | turbanoff | 836 | |
1378 | turbanoff | 837 | ;-------------------------------------------------------------- |
838 | ext2_HdRead: |
||
839 | cmp byte [esi], 0 |
||
1397 | turbanoff | 840 | jnz @F |
1378 | turbanoff | 841 | |
1384 | turbanoff | 842 | .this_is_nofile: |
1378 | turbanoff | 843 | or ebx, -1 |
844 | mov eax, ERROR_ACCESS_DENIED |
||
845 | ret |
||
846 | |||
1397 | turbanoff | 847 | @@: |
2889 | turbanoff | 848 | push ecx ebx edx |
1397 | turbanoff | 849 | call ext2_find_lfn |
2889 | turbanoff | 850 | pop edx ebx ecx |
851 | test eax, eax |
||
852 | jz @F |
||
853 | |||
1397 | turbanoff | 854 | or ebx, -1 |
855 | mov eax, ERROR_FILE_NOT_FOUND |
||
856 | ret |
||
857 | |||
2889 | turbanoff | 858 | @@: |
2973 | turbanoff | 859 | mov ax, [ebp + EXT2_INODE_STRUC.i_mode] |
860 | and ax, EXT2_S_IFMT ;оставляем только тип inode в ax |
||
861 | cmp ax, EXT2_S_IFREG |
||
862 | jne .this_is_nofile |
||
1397 | turbanoff | 863 | |
864 | mov edi, edx ; edi = pointer to return mem |
||
2889 | turbanoff | 865 | |
866 | test ebx, ebx |
||
867 | jz @F |
||
1397 | turbanoff | 868 | mov esi, ebx ; esi = pointer to first_wanted |
1378 | turbanoff | 869 | mov ebx, [esi+4] |
870 | mov eax, [esi] ; ebx : eax - стартовый номер байта |
||
871 | |||
2889 | turbanoff | 872 | ;///// сравним хватит ли нам файла или нет |
1397 | turbanoff | 873 | cmp [ebp + EXT2_INODE_STRUC.i_dir_acl], ebx |
1378 | turbanoff | 874 | ja .size_great |
875 | jb .size_less |
||
876 | |||
1397 | turbanoff | 877 | cmp [ebp + EXT2_INODE_STRUC.i_size], eax |
1378 | turbanoff | 878 | ja .size_great |
879 | |||
880 | .size_less: |
||
1397 | turbanoff | 881 | xor ebx, ebx |
1419 | turbanoff | 882 | mov eax, ERROR_END_OF_FILE |
1378 | turbanoff | 883 | ret |
2889 | turbanoff | 884 | |
885 | @@: |
||
886 | xor ebx, ebx |
||
887 | xor eax, eax |
||
1378 | turbanoff | 888 | .size_great: |
1397 | turbanoff | 889 | add eax, ecx ;add to first_wanted кол-во байт для чтения |
890 | adc ebx, 0 |
||
891 | |||
892 | cmp [ebp + EXT2_INODE_STRUC.i_dir_acl], ebx |
||
1378 | turbanoff | 893 | ja .size_great_great |
894 | jb .size_great_less |
||
1397 | turbanoff | 895 | cmp [ebp + EXT2_INODE_STRUC.i_size], eax |
2889 | turbanoff | 896 | jae .size_great_great |
1397 | turbanoff | 897 | |
1378 | turbanoff | 898 | .size_great_less: |
3313 | turbanoff | 899 | push 1 ;читаем по границе размера |
1397 | turbanoff | 900 | mov ecx, [ebp + EXT2_INODE_STRUC.i_size] |
2889 | turbanoff | 901 | sub ecx, [esi] ;(размер - старт) = сколько читать |
1378 | turbanoff | 902 | jmp @F |
903 | |||
904 | .size_great_great: |
||
3313 | turbanoff | 905 | push 0 ;читаем столько сколько запросили |
1378 | turbanoff | 906 | |
907 | @@: |
||
2889 | turbanoff | 908 | ;здесь мы точно знаем сколько байт читать - ecx |
909 | ;edi - return memory |
||
910 | ;esi -> first wanted |
||
911 | |||
912 | push ecx ;количество считанных байт |
||
1397 | turbanoff | 913 | test esi, esi |
914 | jz .zero_start |
||
1378 | turbanoff | 915 | |
2889 | turbanoff | 916 | ;получим кусок из первого блока |
1397 | turbanoff | 917 | mov edx, [esi+4] |
918 | mov eax, [esi] |
||
1378 | turbanoff | 919 | div [ext2_data.block_size] |
920 | |||
3313 | turbanoff | 921 | push eax ;счетчик блоков ложим в стек |
2889 | turbanoff | 922 | |
1378 | turbanoff | 923 | push ecx |
924 | mov ecx, eax |
||
925 | call ext2_get_inode_block |
||
2889 | turbanoff | 926 | test eax, eax |
927 | jnz .error_at_first_block |
||
1397 | turbanoff | 928 | mov ebx, [ext2_data.ext2_save_block] |
1378 | turbanoff | 929 | mov eax, ecx |
930 | call ext2_get_block |
||
2889 | turbanoff | 931 | test eax, eax |
932 | jnz .error_at_first_block |
||
1378 | turbanoff | 933 | pop ecx |
934 | add ebx, edx |
||
935 | |||
936 | neg edx |
||
2288 | clevermous | 937 | add edx, [ext2_data.block_size] ;block_size - стартовый байт = сколько байт 1-го блока |
1378 | turbanoff | 938 | cmp ecx, edx |
939 | jbe .only_one_block |
||
940 | |||
941 | mov eax, ecx |
||
942 | sub eax, edx |
||
943 | mov ecx, edx |
||
944 | |||
945 | mov esi, ebx |
||
2288 | clevermous | 946 | rep movsb ;кусок 1-го блока |
2889 | turbanoff | 947 | jmp .calc_blocks_count |
1378 | turbanoff | 948 | |
949 | .zero_start: |
||
1389 | turbanoff | 950 | mov eax, ecx |
3313 | turbanoff | 951 | push 0 ;счетчик блоков ложим в стек |
1378 | turbanoff | 952 | ;теперь в eax кол-во оставшихся байт для чтения |
2889 | turbanoff | 953 | .calc_blocks_count: |
1397 | turbanoff | 954 | mov ebx, edi ;чтение блока прям в ->ebx |
1378 | turbanoff | 955 | xor edx, edx |
2889 | turbanoff | 956 | div [ext2_data.block_size] ;кол-во байт в последнем блоке (остаток) в edx |
1397 | turbanoff | 957 | mov edi, eax ;кол-во целых блоков в edi |
1378 | turbanoff | 958 | @@: |
2288 | clevermous | 959 | test edi, edi |
1378 | turbanoff | 960 | jz .finish_block |
2889 | turbanoff | 961 | inc dword [esp] |
962 | mov ecx, [esp] |
||
1378 | turbanoff | 963 | call ext2_get_inode_block |
2889 | turbanoff | 964 | test eax, eax |
965 | jnz .error_at_read_cycle |
||
1378 | turbanoff | 966 | |
1397 | turbanoff | 967 | mov eax, ecx ;а ebx уже забит нужным значением |
1378 | turbanoff | 968 | call ext2_get_block |
2889 | turbanoff | 969 | test eax, eax |
970 | jnz .error_at_read_cycle |
||
1378 | turbanoff | 971 | add ebx, [ext2_data.block_size] |
972 | |||
1397 | turbanoff | 973 | dec edi |
1378 | turbanoff | 974 | jmp @B |
975 | |||
976 | .finish_block: ;в edx - кол-во байт в последнем блоке |
||
1397 | turbanoff | 977 | test edx, edx |
978 | jz .end_read |
||
1378 | turbanoff | 979 | |
2889 | turbanoff | 980 | pop ecx ;счетчик блоков -> ecx |
1378 | turbanoff | 981 | inc ecx |
982 | call ext2_get_inode_block |
||
2889 | turbanoff | 983 | test eax, eax |
3317 | turbanoff | 984 | jnz .error_at_finish_block |
1378 | turbanoff | 985 | |
986 | mov edi, ebx |
||
987 | mov eax, ecx |
||
988 | mov ebx, [ext2_data.ext2_save_block] |
||
989 | call ext2_get_block |
||
2889 | turbanoff | 990 | test eax, eax |
991 | jnz .error_at_finish_block |
||
1378 | turbanoff | 992 | |
2889 | turbanoff | 993 | mov ecx, edx |
1378 | turbanoff | 994 | mov esi, ebx |
2288 | clevermous | 995 | rep movsb ;кусок last блока |
3313 | turbanoff | 996 | jmp @F |
997 | |||
1389 | turbanoff | 998 | .end_read: |
3313 | turbanoff | 999 | pop ecx ;счетчик блоков, который хранился в стеке |
1000 | @@: |
||
1001 | pop ebx ;количество считанных байт |
||
1002 | pop eax ; 1 или 0 - достигли ли конца файла |
||
2889 | turbanoff | 1003 | test eax, eax |
1378 | turbanoff | 1004 | jz @F |
1005 | |||
1419 | turbanoff | 1006 | mov eax, ERROR_END_OF_FILE |
1378 | turbanoff | 1007 | ret |
1008 | @@: |
||
1009 | xor eax, eax |
||
1010 | ret |
||
2889 | turbanoff | 1011 | |
1012 | .only_one_block: |
||
1013 | mov esi, ebx |
||
1014 | rep movsb ;кусок last блока |
||
1015 | jmp .end_read |
||
1016 | |||
1017 | .error_at_first_block: |
||
1018 | pop edx |
||
1019 | .error_at_read_cycle: |
||
1020 | pop ebx |
||
1021 | .error_at_finish_block: |
||
1022 | pop ecx edx |
||
1023 | or ebx, -1 |
||
1024 | ret |
||
1025 | |||
1026 | ;---------------------------------------------------------------- |
||
1027 | ; in: esi = file path |
||
1028 | ; ebx = pointer to dir block |
||
1029 | ; out: esi - name without parent or not_changed |
||
1030 | ; ebx - dir_rec of inode children |
||
1031 | ext2_test_block_by_name: |
||
1032 | sub esp, 256 ;EXT2_filename |
||
1033 | mov edx, ebx |
||
1034 | add edx, [ext2_data.block_size] ;запомним конец блока |
||
1035 | |||
1036 | .start_rec: |
||
1037 | cmp [ebx + EXT2_DIR_STRUC.inode], 0 |
||
1038 | jz .next_rec |
||
1039 | |||
1040 | mov edi, esp |
||
1041 | push esi |
||
1042 | movzx ecx, [ebx + EXT2_DIR_STRUC.name_len] |
||
1043 | lea esi, [ebx + EXT2_DIR_STRUC.name] |
||
1044 | call utf8_to_cp866 |
||
1045 | |||
1046 | mov ecx, edi |
||
1047 | lea edi, [esp + 4] |
||
1048 | sub ecx, edi ;кол-во байт в получившейся строке |
||
1049 | |||
1050 | mov esi, [esp] |
||
1051 | @@: |
||
1052 | jecxz .test_find |
||
1053 | dec ecx |
||
1054 | |||
1055 | lodsb |
||
1056 | call char_toupper |
||
1057 | |||
1058 | mov ah, [edi] |
||
1059 | inc edi |
||
1060 | xchg al, ah |
||
1061 | call char_toupper |
||
1062 | cmp al, ah |
||
1063 | je @B |
||
1064 | @@: ;не подошло |
||
1065 | pop esi |
||
1066 | .next_rec: |
||
1067 | movzx eax, [ebx + EXT2_DIR_STRUC.rec_len] |
||
1068 | add ebx, eax ;к след. записи |
||
1069 | cmp ebx, edx ;проверим конец ли |
||
1070 | jb .start_rec |
||
1071 | add esp, 256 |
||
1072 | ret |
||
1073 | |||
1074 | .test_find: |
||
1075 | cmp byte [esi], 0 |
||
1076 | je .ret ;нашли конец |
||
1077 | cmp byte [esi], '/' |
||
1078 | jne @B |
||
1079 | inc esi |
||
1080 | .ret: |
||
1081 | add esp, 256 + 4 |
||
1082 | ret |
||
1083 | |||
1378 | turbanoff | 1084 | ;======================== |
2889 | turbanoff | 1085 | ;Ищет inode по строке пути |
1086 | ;in: esi = name |
||
1087 | ;out: eax - error code |
||
1088 | ; ebp = inode |
||
1089 | ; dl - первый байт из имени файла/папки |
||
1384 | turbanoff | 1090 | ext2_find_lfn: |
1091 | mov ebp, [ext2_data.root_inode] |
||
2889 | turbanoff | 1092 | cmp [ebp + EXT2_INODE_STRUC.i_blocks], 0 |
1093 | je .error_empty_root |
||
1094 | |||
1095 | .next_path_part: |
||
1096 | push [ebp + EXT2_INODE_STRUC.i_blocks] |
||
1097 | xor ecx, ecx |
||
1098 | .folder_block_cycle: |
||
3403 | turbanoff | 1099 | push ecx |
1384 | turbanoff | 1100 | call ext2_get_inode_block |
2889 | turbanoff | 1101 | test eax, eax |
1102 | jnz .error_get_inode_block |
||
1103 | |||
1384 | turbanoff | 1104 | mov eax, ecx |
1105 | mov ebx, [ext2_data.ext2_save_block] ;ebx = cur dir record |
||
1106 | call ext2_get_block |
||
2889 | turbanoff | 1107 | test eax, eax |
1108 | jnz .error_get_block |
||
1109 | |||
1110 | push esi |
||
1384 | turbanoff | 1111 | call ext2_test_block_by_name |
3403 | turbanoff | 1112 | pop edi ecx |
1384 | turbanoff | 1113 | |
2889 | turbanoff | 1114 | cmp edi, esi ;нашли имя? |
1115 | je .next_folder_block ;не нашли -> к след. блоку |
||
1116 | |||
1117 | cmp byte [esi], 0 ;дошли до "конца" пути -> возваращаемся |
||
1384 | turbanoff | 1118 | jz .get_inode_ret |
1119 | |||
2889 | turbanoff | 1120 | cmp [ebx + EXT2_DIR_STRUC.file_type], EXT2_FT_DIR ;нашли, но это не папка |
1121 | jne .not_found |
||
1122 | |||
1384 | turbanoff | 1123 | mov eax, [ebx + EXT2_DIR_STRUC.inode] |
1124 | mov ebx, [ext2_data.ext2_save_inode] ;все же папка. |
||
1125 | call ext2_get_inode |
||
2889 | turbanoff | 1126 | test eax, eax |
1127 | jnz .error_get_inode |
||
1128 | pop ecx ;в стеке лежит кол-во блоков |
||
1384 | turbanoff | 1129 | mov ebp, ebx |
2889 | turbanoff | 1130 | jmp .next_path_part |
1131 | |||
1132 | .next_folder_block: |
||
1133 | ;к следующему блоку в текущей папке |
||
1134 | pop eax ;счетчик блоков |
||
1135 | sub eax, [ext2_data.count_block_in_block] |
||
1136 | jle .not_found |
||
1137 | |||
3316 | turbanoff | 1138 | push eax |
2889 | turbanoff | 1139 | inc ecx |
1140 | jmp .folder_block_cycle |
||
1384 | turbanoff | 1141 | |
1142 | .not_found: |
||
2889 | turbanoff | 1143 | mov eax, ERROR_FILE_NOT_FOUND |
1384 | turbanoff | 1144 | ret |
2889 | turbanoff | 1145 | |
1384 | turbanoff | 1146 | .get_inode_ret: |
2889 | turbanoff | 1147 | pop ecx ;в стеке лежит кол-во блоков |
1148 | mov dl, [ebx + EXT2_DIR_STRUC.name] ;в dl - первый символ () |
||
1384 | turbanoff | 1149 | mov eax, [ebx + EXT2_DIR_STRUC.inode] |
1150 | mov ebx, [ext2_data.ext2_save_inode] |
||
1151 | call ext2_get_inode |
||
1152 | mov ebp, ebx |
||
2889 | turbanoff | 1153 | xor eax, eax |
1384 | turbanoff | 1154 | ret |
1155 | |||
2889 | turbanoff | 1156 | .error_get_inode_block: |
1157 | .error_get_block: |
||
3403 | turbanoff | 1158 | pop ecx |
2889 | turbanoff | 1159 | .error_get_inode: |
1160 | pop ebx |
||
1161 | .error_empty_root: |
||
1162 | mov eax, ERROR_FS_FAIL |
||
1163 | ret |
||
1384 | turbanoff | 1164 | |
2889 | turbanoff | 1165 | ;---------------------------------------------------------------- |
1166 | ;ext2_HdGetFileInfo - read file info from block device |
||
1167 | ; |
||
1168 | ;in: esi points to filename |
||
1169 | ; edx mem location to return data |
||
1170 | ;-------------------------------------------------------------- |
||
1378 | turbanoff | 1171 | ext2_HdGetFileInfo: |
2889 | turbanoff | 1172 | xchg bx, bx |
1384 | turbanoff | 1173 | cmp byte [esi], 0 |
2889 | turbanoff | 1174 | jz .is_root |
1384 | turbanoff | 1175 | |
2889 | turbanoff | 1176 | push edx |
1384 | turbanoff | 1177 | call ext2_find_lfn |
2889 | turbanoff | 1178 | mov ebx, edx |
1179 | pop edx |
||
1180 | test eax, eax |
||
1181 | jz @F |
||
1378 | turbanoff | 1182 | ret |
1384 | turbanoff | 1183 | |
2889 | turbanoff | 1184 | .is_root: |
1185 | xor ebx, ebx ;root не может быть скрытым |
||
1384 | turbanoff | 1186 | mov ebp, [ext2_data.root_inode] |
1400 | turbanoff | 1187 | @@: |
1384 | turbanoff | 1188 | xor eax, eax |
1189 | mov edi, edx |
||
1190 | mov ecx, 40/4 |
||
2288 | clevermous | 1191 | rep stosd ; fill zero |
1384 | turbanoff | 1192 | |
2889 | turbanoff | 1193 | cmp bl, '.' |
1194 | jne @F |
||
1400 | turbanoff | 1195 | or dword [edx], FS_FT_HIDDEN |
1196 | @@: |
||
1197 | |||
1384 | turbanoff | 1198 | test [ebp + EXT2_INODE_STRUC.i_mode], EXT2_S_IFDIR |
2288 | clevermous | 1199 | jnz @F |
1384 | turbanoff | 1200 | mov eax, [ebp + EXT2_INODE_STRUC.i_size] ;low size |
1201 | mov ebx, [ebp + EXT2_INODE_STRUC.i_dir_acl] ;high size |
||
1202 | mov dword [edx+32], eax |
||
1203 | mov dword [edx+36], ebx |
||
1400 | turbanoff | 1204 | xor dword [edx], FS_FT_DIR |
1205 | @@: |
||
1206 | xor dword [edx], FS_FT_DIR |
||
1384 | turbanoff | 1207 | |
1400 | turbanoff | 1208 | lea edi, [edx + 8] |
2889 | turbanoff | 1209 | mov eax, [ebp + EXT2_INODE_STRUC.i_ctime] |
1400 | turbanoff | 1210 | xor edx, edx |
1211 | add eax, 3054539008 |
||
1212 | adc edx, 2 |
||
1213 | call ntfs_datetime_to_bdfe.sec |
||
1214 | |||
2889 | turbanoff | 1215 | mov eax, [ebp + EXT2_INODE_STRUC.i_atime] |
1400 | turbanoff | 1216 | xor edx, edx |
1217 | add eax, 3054539008 |
||
1218 | adc edx, 2 |
||
1219 | call ntfs_datetime_to_bdfe.sec |
||
1220 | |||
2889 | turbanoff | 1221 | mov eax, [ebp + EXT2_INODE_STRUC.i_mtime] |
1400 | turbanoff | 1222 | xor edx, edx |
1223 | add eax, 3054539008 |
||
1224 | adc edx, 2 |
||
1225 | call ntfs_datetime_to_bdfe.sec |
||
1226 | |||
1384 | turbanoff | 1227 | xor eax, eax |
1228 | ret |
||
1229 | |||
1419 | turbanoff | 1230 | ext2_HdRewrite: |
1231 | ext2_HdWrite: |
||
1232 | ext2_HdSetFileEnd: |
||
1378 | turbanoff | 1233 | ext2_HdSetFileInfo: |
1419 | turbanoff | 1234 | ext2_HdDelete: |
1235 | ext2_HdCreateFolder: |
||
1378 | turbanoff | 1236 | xor ebx, ebx |
1237 | mov eax, ERROR_UNSUPPORTED_FS |
||
1238 | ret |