forked from KolibriOS/kolibrios
ext2fs fix bugs with large file
git-svn-id: svn://kolibrios.org@1387 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
turbanoff
parent
5d324bdafa
commit
1f81205a1d
@ -109,14 +109,14 @@ ext2_setup:
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shl eax, 2
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mov [ext2_data.block_size], eax
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push eax eax eax ;3 kernel_alloc
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push eax eax eax ; 3 kernel_alloc
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mov eax, edx
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mul edx
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mov [ext2_data.count_pointer_in_block_square], eax
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call kernel_alloc
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mov [ext2_data.global_desc_table],eax ;reserve mem for gdt
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mov [ext2_data.global_desc_table],eax ; reserve mem for gdt
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call kernel_alloc
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mov [ext2_data.ext2_save_block], eax ; and for temp block
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call kernel_alloc
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@ -168,21 +168,22 @@ ext2_get_block:
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pop ecx ebx eax
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ret
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;===================================================================
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; in: ecx = номер блока
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; in: ecx = номер блока в inode (0..)
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; ebp = адрес inode
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; out: ecx = адрес очередного блока
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ext2_get_inode_block:
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cmp ecx, 12
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jbe .get_direct_block
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cmp ecx, 12 ; 0..11 - direct block address
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jb .get_direct_block
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sub ecx, 12
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cmp ecx, [ext2_data.count_pointer_in_block]
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jbe .get_indirect_block
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cmp ecx, [ext2_data.count_pointer_in_block] ; 12.. - indirect block
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jb .get_indirect_block
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sub ecx, [ext2_data.count_pointer_in_block]
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cmp ecx, [ext2_data.count_pointer_in_block_square]
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jbe .get_double_indirect_block
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jb .get_double_indirect_block
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sub ecx, [ext2_data.count_pointer_in_block_square]
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;.get_triple_indirect_block:
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push eax edx ebx
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@ -196,7 +197,7 @@ ext2_get_inode_block:
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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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call ext2_get_block
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call ext2_get_block
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mov eax, edx
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jmp @F
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@ -223,7 +224,7 @@ ext2_get_inode_block:
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.get_indirect_block:
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push eax ebx
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mov eax, [ebp + EXT2_INODE_STRUC.i_block + 12*4]
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mov ebx, [ext2_data.ext2_temp_block]
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mov ebx, [ext2_data.ext2_temp_block]
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call ext2_get_block
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mov ecx, [ebx + ecx*4]
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@ -367,62 +368,44 @@ uglobal
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endg
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ext2_HdReadFolder:
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mov ebp, [ext2_data.root_inode]
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mov [EXT2_read_in_folder], ebx
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mov [EXT2_files_in_folder], ecx ;сохраним регистры
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.next_folder:
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cmp byte [esi], 0
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jz .get_folder
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or [EXT2_counter_blocks], -1 ;счетчик блоков папки cur block of inode
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mov eax, [ebp + EXT2_INODE_STRUC.i_blocks] ;убывающий счетчик блоков
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add eax, [ext2_data.count_block_in_block]
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mov [EXT2_end_block], eax
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.next_block_folder:
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mov eax, [ext2_data.count_block_in_block]
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sub [EXT2_end_block], eax
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jz .not_found
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inc [EXT2_counter_blocks]
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mov ecx, [EXT2_counter_blocks]
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call ext2_get_inode_block
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mov eax, ecx
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mov ebx, [ext2_data.ext2_save_block] ;ebx = cur dir record
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call ext2_get_block
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mov eax, esi
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call ext2_test_block_by_name
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cmp eax, esi ;нашли имя?
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je .next_block_folder
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cmp [ebx + EXT2_DIR_STRUC.file_type], EXT2_FT_DIR
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jne .not_found ;нашли, но это не папка
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mov eax, [ebx + EXT2_DIR_STRUC.inode]
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mov ebx, [ext2_data.ext2_save_inode] ;все же папка.
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call ext2_get_inode
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mov ebp, ebx
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jmp .next_folder
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jz .doit
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push ecx ebx
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call ext2_find_lfn
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jnc .doit2
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pop ebx
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.not_found:
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pop ecx
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or ebx, -1
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mov eax, ERROR_FILE_NOT_FOUND
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ret
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;--------------------------------------------- final step
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; in ebp - pointer to final inode (folder).
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.get_folder:
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push edx ;заголовок будем заполнять в конце (адрес - в стеке) edx
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push [EXT2_read_in_folder] ;сохраненный регистр тоже в стек
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mov edi, [EXT2_files_in_folder] ;edi = число блоков для чтения
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.doit:
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mov ebp, [ext2_data.root_inode]
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push ecx
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jmp @F
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.doit2:
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pop ebx
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test [ebp + EXT2_INODE_STRUC.i_mode], EXT2_S_IFDIR
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jz .not_found
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@@:
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xor eax, eax
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mov edi, edx
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mov ecx, 32/4
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rep stosd ; fill header zero
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pop edi ; edi = число блоков для чтения
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push edx ebx
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;--------------------------------------------- final step
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and [EXT2_read_in_folder], 0
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and [EXT2_files_in_folder], 0
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mov eax, [ebp + EXT2_INODE_STRUC.i_blocks]
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mov [EXT2_counter_blocks], eax
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add edx, 32 ;заголовок будем заполнять в конце (адрес - в стеке) edx = current mem for return
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xor esi, esi ;esi = номер блока по порядку
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add edx, 32 ; заголовок будем заполнять в конце (адрес - в стеке) edx = current mem for return
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xor esi, esi ; esi = номер блока по порядку
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.new_block_folder: ;reserved label
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mov ecx, esi ; получим номер блока
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