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Rev 1384 Rev 1387
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;;   23.01.2010  turbanoff  - support 70.0 70.1                 ;;
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;;   23.01.2010  turbanoff  - support 70.0 70.1                 ;;
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;;                                                              ;;
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;;                                                              ;;
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;;                                                              ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 1384 $
 11 
$Revision: 1387 $
12 
 
 12 
 
13 
EXT2_BAD_INO        = 1
 13 
EXT2_BAD_INO        = 1
14 
EXT2_ROOT_INO        = 2
 14 
EXT2_ROOT_INO        = 2
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107 
        mov     edx, eax                                ; потом еще квадрат найдем
 107 
        mov     edx, eax                                ; потом еще квадрат найдем
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 108 
 
109 
        shl     eax, 2
 109 
        shl     eax, 2
Line 110... Line 110...
110 
        mov     [ext2_data.block_size], eax
 110 
        mov     [ext2_data.block_size], eax
Line 111... Line 111...
111 
 
 111 
 
112 
        push    eax eax eax                             ;3 kernel_alloc
 112 
        push    eax eax eax                             ; 3 kernel_alloc
113 
 
 113 
 
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        mov     eax, edx
 114 
        mov     eax, edx
115 
        mul     edx
 115 
        mul     edx
116 
        mov     [ext2_data.count_pointer_in_block_square], eax
 116 
        mov     [ext2_data.count_pointer_in_block_square], eax
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 117 
 
118 
        call    kernel_alloc
 118 
        call    kernel_alloc
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        mov     [ext2_data.global_desc_table],eax       ;reserve mem for gdt
 119 
        mov     [ext2_data.global_desc_table],eax       ; reserve mem for gdt
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        add     ebx, 512
 166 
        add     ebx, 512
167 
        loop    @B
 167 
        loop    @B
168 
        pop     ecx ebx eax
 168 
        pop     ecx ebx eax
169 
        ret
 169 
        ret
170 
;===================================================================
 170 
;===================================================================
171 
; in:  ecx = номер блока
 171 
; in:  ecx = номер блока в inode (0..)
172 
;      ebp = адрес inode
 172 
;      ebp = адрес inode
173 
; out: ecx = адрес очередного блока
 173 
; out: ecx = адрес очередного блока
174 
ext2_get_inode_block:
 174 
ext2_get_inode_block:
175 
        cmp     ecx, 12
 175 
        cmp     ecx, 12                                         ; 0..11 - direct block address
176 
        jbe     .get_direct_block
 176 
        jb      .get_direct_block
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 177 
 
178 
        sub     ecx, 12
 178 
        sub     ecx, 12
179 
        cmp     ecx, [ext2_data.count_pointer_in_block]
 179 
        cmp     ecx, [ext2_data.count_pointer_in_block]         ; 12.. - indirect block
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        jbe     .get_indirect_block
 180 
        jb      .get_indirect_block
181 
 
 181 
 
182 
        sub     ecx, [ext2_data.count_pointer_in_block]
 182 
        sub     ecx, [ext2_data.count_pointer_in_block]
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- 
 
 183 
        cmp     ecx, [ext2_data.count_pointer_in_block_square]
183 
        cmp     ecx, [ext2_data.count_pointer_in_block_square]
 184 
        jb      .get_double_indirect_block
184 
        jbe     .get_double_indirect_block
 185 
 
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 186 
        sub     ecx, [ext2_data.count_pointer_in_block_square]
186 
    ;.get_triple_indirect_block:
 187 
    ;.get_triple_indirect_block:
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        mov     eax, ecx
 195 
        mov     eax, ecx
195 
        div     [ext2_data.count_pointer_in_block_square]
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        div     [ext2_data.count_pointer_in_block_square]
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 197 
 
197 
    ;eax - номер в полученном блоке   edx - номер дальше
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    ;eax - номер в полученном блоке   edx - номер дальше
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        mov    eax, [ebx + eax*4]
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        mov    eax, [ebx + eax*4]
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        call    ext2_get_block
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        call   ext2_get_block
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 201 
 
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        mov    eax, edx
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        mov    eax, edx
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        ret
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        ret
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 223 
 
223 
    .get_indirect_block:
 224 
    .get_indirect_block:
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        push    eax ebx
 225 
        push    eax ebx
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        mov     eax, [ebp + EXT2_INODE_STRUC.i_block + 12*4]
 226 
        mov     eax, [ebp + EXT2_INODE_STRUC.i_block + 12*4]
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        mov    ebx, [ext2_data.ext2_temp_block]
 227 
        mov     ebx, [ext2_data.ext2_temp_block]
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        call    ext2_get_block
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        call    ext2_get_block
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 229 
 
229 
        mov     ecx, [ebx + ecx*4]
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        mov     ecx, [ebx + ecx*4]
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    EXT2_end_block          dd ?   ;конец очередного блока папки
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    EXT2_end_block          dd ?   ;конец очередного блока папки
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    EXT2_counter_blocks     dd ?
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    EXT2_counter_blocks     dd ?
367 
endg
 368 
endg
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 369 
 
369 
ext2_HdReadFolder:
 - 
 
370 
        mov     ebp, [ext2_data.root_inode]
 - 
 
371 
        mov     [EXT2_read_in_folder], ebx
 - 
 
372 
        mov     [EXT2_files_in_folder], ecx     ;сохраним регистры
 - 
 
373 
 
 - 
 
374 
    .next_folder:
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ext2_HdReadFolder:
375 
        cmp     byte [esi], 0
 - 
 
376 
        jz      .get_folder
 - 
 
377 
 
 - 
 
378 
        or      [EXT2_counter_blocks], -1               ;счетчик блоков папки    cur block of inode
 - 
 
379 
        mov     eax, [ebp + EXT2_INODE_STRUC.i_blocks]  ;убывающий счетчик блоков
 - 
 
380 
        add     eax, [ext2_data.count_block_in_block]
 - 
 
381 
        mov     [EXT2_end_block], eax
 - 
 
382 
    .next_block_folder:
 - 
 
383 
        mov     eax, [ext2_data.count_block_in_block]
 - 
 
384 
        sub     [EXT2_end_block], eax
 371 
        cmp     byte [esi], 0
385 
        jz      .not_found
 - 
 
386 
        inc     [EXT2_counter_blocks]
 - 
 
387 
        mov     ecx, [EXT2_counter_blocks]
 - 
 
388 
        call    ext2_get_inode_block
 - 
 
389 
 
 - 
 
390 
        mov     eax, ecx
 - 
 
391 
        mov     ebx, [ext2_data.ext2_save_block]        ;ebx = cur dir record
 - 
 
392 
        call    ext2_get_block
 - 
 
393 
 
 - 
 
394 
        mov     eax, esi
 - 
 
395 
        call    ext2_test_block_by_name
 - 
 
396 
        cmp     eax, esi                                ;нашли имя?
 - 
 
397 
        je      .next_block_folder
 - 
 
398 
 
 - 
 
399 
        cmp     [ebx + EXT2_DIR_STRUC.file_type], EXT2_FT_DIR
 - 
 
400 
        jne     .not_found                                      ;нашли, но это не папка
 - 
 
401 
        mov     eax, [ebx + EXT2_DIR_STRUC.inode]
 - 
 
402 
        mov     ebx, [ext2_data.ext2_save_inode]                ;все же папка.
 - 
 
403 
        call    ext2_get_inode
 - 
 
404 
        mov     ebp, ebx
 - 
 
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- 
 
 372 
        jz      .doit
- 
 
 373 
 
- 
 
 374 
        push    ecx ebx
- 
 
 375 
        call    ext2_find_lfn
405 
        jmp     .next_folder
 376 
        jnc     .doit2
- 
 
 377 
        pop     ebx
406 
 
 378 
    .not_found:
407 
    .not_found:
 379 
        pop     ecx
408 
        or      ebx, -1
 380 
        or      ebx, -1
409 
        mov     eax, ERROR_FILE_NOT_FOUND
 - 
 
410 
        ret
 - 
 
411 
     ;--------------------------------------------- final step
 - 
 
412 
        ; in ebp - pointer to final inode (folder).
 - 
 
413 
    .get_folder:
 - 
 
Line -... Line 381...
- 
 
 381 
        mov     eax, ERROR_FILE_NOT_FOUND
- 
 
 382 
        ret
- 
 
 383 
 
- 
 
 384 
    .doit:
- 
 
 385 
        mov     ebp, [ext2_data.root_inode]
- 
 
 386 
        push    ecx
- 
 
 387 
        jmp     @F
- 
 
 388 
    .doit2:
- 
 
 389 
        pop     ebx
- 
 
 390 
        test    [ebp + EXT2_INODE_STRUC.i_mode], EXT2_S_IFDIR
- 
 
 391 
        jz      .not_found
- 
 
 392 
    @@:
- 
 
 393 
        xor     eax, eax
414 
        push    edx                             ;заголовок будем заполнять в конце (адрес - в стеке) edx
 394 
        mov     edi, edx
- 
 
 395 
        mov     ecx, 32/4
- 
 
 396 
        rep     stosd                           ; fill header zero
- 
 
 397 
        pop     edi                             ; edi = число блоков для чтения
415 
        push    [EXT2_read_in_folder]           ;сохраненный регистр тоже в стек
 398 
        push    edx ebx
416 
 
 399 
 
Line 417... Line 400...
417 
        mov     edi, [EXT2_files_in_folder]     ;edi = число блоков для чтения
 400 
     ;--------------------------------------------- final step
418 
        and     [EXT2_read_in_folder], 0
 401 
        and     [EXT2_read_in_folder], 0
Line 419... Line 402...
419 
        and     [EXT2_files_in_folder], 0
 402 
        and     [EXT2_files_in_folder], 0
420 
 
 403 
 
Line 421... Line 404...
421 
        mov     eax, [ebp + EXT2_INODE_STRUC.i_blocks]
 404 
        mov     eax, [ebp + EXT2_INODE_STRUC.i_blocks]
422 
        mov     [EXT2_counter_blocks], eax
 405 
        mov     [EXT2_counter_blocks], eax
423 
 
 406