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ext2fs support. read only

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git-svn-id: svn://kolibrios.org@1378 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
turbanoff 2010-01-23 15:24:03 +00:00
parent 35c4be95ad
commit 7eed0cd366
9 changed files with 969 additions and 96 deletions
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2
kernel/trunk/data32.inc
View File

@ -368,6 +368,7 @@ cdid rd 1
hdbase rd 1 ; for boot 0x1f0
hdid rd 1
hdpos rd 1 ; for boot 0x1
label known_part dword
fat32part rd 1 ; for boot 0x1
cdpos rd 1
@ -464,3 +465,4 @@ BiosDiskCaches rb 80h*(cache_ide1-cache_ide0)
BiosDiskPartitions rd 80h
IncludeUGlobals

32
kernel/trunk/detect/sear_par.inc
View File

@ -20,15 +20,15 @@ $Revision$
mov [hdbase],0x1f0
mov [hdid],0x0
mov [hdpos],1
mov [fat32part],1
mov [known_part],1
search_partitions_ide0_1:
call set_FAT32_variables
call set_PARTITION_variables
cmp [problem_partition],0
jne search_partitions_ide1
inc byte [DRIVE_DATA+2]
call partition_data_transfer
add [transfer_adress],100
inc [fat32part]
inc [known_part]
jmp search_partitions_ide0_1
search_partitions_ide1:
@ -37,15 +37,15 @@ $Revision$
mov [hdbase],0x1f0
mov [hdid],0x10
mov [hdpos],2
mov [fat32part],1
mov [known_part],1
search_partitions_ide1_1:
call set_FAT32_variables
call set_PARTITION_variables
cmp [problem_partition],0
jne search_partitions_ide2
inc byte [DRIVE_DATA+3]
call partition_data_transfer
add [transfer_adress],100
inc [fat32part]
inc [known_part]
jmp search_partitions_ide1_1
search_partitions_ide2:
@ -54,15 +54,15 @@ $Revision$
mov [hdbase],0x170
mov [hdid],0x0
mov [hdpos],3
mov [fat32part],1
mov [known_part],1
search_partitions_ide2_1:
call set_FAT32_variables
call set_PARTITION_variables
cmp [problem_partition],0
jne search_partitions_ide3
inc byte [DRIVE_DATA+4]
call partition_data_transfer
add [transfer_adress],100
inc [fat32part]
inc [known_part]
jmp search_partitions_ide2_1
search_partitions_ide3:
@ -71,15 +71,15 @@ $Revision$
mov [hdbase],0x170
mov [hdid],0x10
mov [hdpos],4
mov [fat32part],1
mov [known_part],1
search_partitions_ide3_1:
call set_FAT32_variables
call set_PARTITION_variables
cmp [problem_partition],0
jne end_search_partitions_ide
inc byte [DRIVE_DATA+5]
call partition_data_transfer
add [transfer_adress],100
inc [fat32part]
inc [known_part]
jmp search_partitions_ide3_1
end_search_partitions_ide:
@ -91,16 +91,16 @@ start_search_partitions_bd:
push ecx
mov eax, [hdpos]
and [BiosDiskPartitions+(eax-80h)*4], 0
mov [fat32part], 1
mov [known_part], 1
search_partitions_bd:
call set_FAT32_variables
call set_PARTITION_variables
cmp [problem_partition], 0
jne end_search_partitions_bd
mov eax, [hdpos]
inc [BiosDiskPartitions+(eax-80h)*4]
call partition_data_transfer
add [transfer_adress], 100
inc [fat32part]
inc [known_part]
jmp search_partitions_bd
end_search_partitions_bd:
pop ecx
@ -110,7 +110,7 @@ end_search_partitions_bd:
partition_data_transfer:
mov edi,[transfer_adress]
mov esi,PARTITION_START
mov esi,PARTITION_START ;start of file_system_data
mov ecx,(file_system_data_size+3)/4
rep movsd
ret

816
kernel/trunk/fs/ext2.inc Normal file
View File

@ -0,0 +1,816 @@
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
;; ;;
;; Copyright (C) KolibriOS team 2004-2010. All rights reserved. ;;
;; Distributed under terms of the GNU General Public License ;;
;; ;;
;; 23.01.2010 turbanoff - read from ext2fs ;;
;; ;;
;; ;;
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
$Revision$
EXT2_BAD_INO = 1
EXT2_ROOT_INO = 2
EXT2_ACL_IDX_INO = 3
EXT2_ACL_DATA_INO = 4
EXT2_BOOT_LOADER_INO= 5
EXT2_UNDEL_DIR_INO = 6
;type inode
EXT2_S_IFREG = 0x8000
EXT2_S_IFDIR = 0x4000
;user inode right's
EXT2_S_IRUSR = 0x0100
EXT2_S_IWUSR = 0x0080
EXT2_S_IXUSR = 0x0040
;group inode right's
EXT2_S_IRGRP = 0x0020
EXT2_S_IWGRP = 0x0010
EXT2_S_IXGRP = 0x0008
;other inode right's
EXT2_S_IROTH = 0x0004
EXT2_S_IROTH = 0x0002
EXT2_S_IROTH = 0x0001
EXT2_FT_REG_FILE = 1 ;это файл, запись в родительском каталоге
EXT2_FT_DIR = 2 ;это папка
FS_FT_DIR = 0x10 ;это папка
FS_FT_ASCII = 0 ;имя в ascii
FS_FT_UNICODE = 1 ;имя в unicode
struct EXT2_INODE_STRUC
.i_mode dw ?
.i_uid dw ?
.i_size dd ?
.i_atime dd ?
.i_ctime dd ?
.i_mtime dd ?
.i_dtime dd ?
.i_gid dw ?
.i_links_count dw ?
.i_blocks dd ?
.i_flags dd ?
.i_osd1 dd ?
.i_block dd 15 dup ?
.i_generation dd ?
.i_file_acl dd ?
.i_dir_acl dd ?
.i_faddr dd ?
.i_osd2 dd ? ; 1..12
ends
struct EXT2_DIR_STRUC
.inode dd ?
.rec_len dw ?
.name_len db ?
.file_type db ?
.name db ? ; 0..255
ends
ext2_test_superblock:
mov eax, [PARTITION_START]
add eax, 2 ;superblock start at 1024b
call hd_read
cmp [fs_type], 0x83
jne .no
cmp dword [ebx+24], 3 ;s_block_size 0,1,2,3
ja .no
cmp word [ebx+56], 0xEF53 ;s_magic
jne .no
cmp word [ebx+58], 1 ;s_state (EXT_VALID_FS=1)
jne .no
; OK, this is correct EXT2 superblock
clc
ret
.no:
; No, this superblock isn't EXT2
stc
ret
ext2_setup:
mov [fs_type], 2
mov ecx, [ebx+24]
inc ecx
mov [ext2_data.log_block_size], ecx ; 1, 2, 3, 4 equ 1kb, 2kb, 4kb, 8kb
mov eax, 1
shl eax, cl
mov [ext2_data.count_block_in_block], eax
shl eax, 7
mov [ext2_data.count_pointer_in_block], eax
mov edx, eax ; потом еще квадрат найдем
shl eax, 2
mov [ext2_data.block_size], eax
push eax eax eax ;3 kernel_alloc
mov eax, edx
mul edx
mov [ext2_data.count_pointer_in_block_square], eax
call kernel_alloc
mov [ext2_data.global_desc_table],eax ;reserve mem for gdt
call kernel_alloc
mov [ext2_data.ext2_save_block], eax ; and for temp block
call kernel_alloc
mov [ext2_data.ext2_temp_block], eax ; and for get_inode proc
mov ebp, [ebx+88]
mov ecx, [ebx+32]
mov edx, [ebx+40]
mov eax, [ebx+20] ; first_data_block
mov [ext2_data.inode_size], ebp
mov [ext2_data.blocks_per_group], ecx
mov [ext2_data.inodes_per_group], edx
mov ebx, [ext2_data.global_desc_table]
inc eax ; first_data_block + 1 = gdt
call ext2_get_block ; read gtd
push ebp ebp ebp ;3 kernel_alloc
call kernel_alloc
mov [ext2_data.ext2_save_inode], eax
call kernel_alloc
mov [ext2_data.ext2_temp_inode], eax
call kernel_alloc
mov [ext2_data.root_inode], eax
mov ebx, eax
mov eax, EXT2_ROOT_INO
call ext2_get_inode ; read root inode
popad
call free_hd_channel
and [hd1_status], 0
ret
;==================================================================
;in: eax = i_block
; ebx = pointer to return memory
ext2_get_block:
push eax ebx ecx
mov ecx, [ext2_data.log_block_size]
shl eax, cl
add eax, [PARTITION_START]
mov ecx, [ext2_data.count_block_in_block]
@@:
call hd_read
inc eax
add ebx, 512
loop @B
pop ecx ebx eax
ret
;===================================================================
; in: ecx = номер блока
; ebp = адрес inode
; out: ecx = адрес очередного блока
ext2_get_inode_block:
cmp ecx, 12
jbe .get_direct_block
sub ecx, 12
cmp ecx, [ext2_data.count_pointer_in_block]
jbe .get_indirect_block
sub ecx, [ext2_data.count_pointer_in_block]
cmp ecx, [ext2_data.count_pointer_in_block_square]
jbe .get_double_indirect_block
;.get_triple_indirect_block:
push eax edx ebx
mov eax, [ebx + EXT2_INODE_STRUC.i_block + 14*4]
mov ebx, [ext2_data.ext2_temp_block]
call ext2_get_block
xor edx, edx
mov eax, ecx
div [ext2_data.count_pointer_in_block_square]
;eax - номер в полученном блоке edx - номер дальше
mov eax, [ebx + eax*4]
call ext2_get_block
mov eax, edx
jmp @F
.get_double_indirect_block:
push eax edx ebx
mov eax, [ebp + EXT2_INODE_STRUC.i_block + 13*4]
mov ebx, [ext2_data.ext2_temp_block]
call ext2_get_block
mov eax, ecx
@@:
xor edx, edx
div [ext2_data.count_pointer_in_block]
mov eax, [ebx + eax*4]
call ext2_get_block
mov ecx, [ebx + edx*4]
pop ebx edx eax
ret
.get_indirect_block:
push eax ebx
mov eax, [ebp + EXT2_INODE_STRUC.i_block + 12*4]
mov ebx, [ext2_data.ext2_temp_block]
call ext2_get_block
mov ecx, [ebx + ecx*4]
pop ebx eax
ret
.get_direct_block:
mov ecx, dword [ebp + EXT2_INODE_STRUC.i_block + ecx*4]
ret
;===================================================================
;get content inode by num
;in: eax = inode_num
; ebx = address of inode content
ext2_get_inode:
pushad
mov edi, ebx ;сохраним адрес inode
dec eax
xor edx, edx
div [ext2_data.inodes_per_group]
push edx ;locale num
mov edx, 32
mul edx ; address block_group in global_desc_table
add eax, [ext2_data.global_desc_table]
mov eax, [eax+8] ; номер блока - в терминах ext2
mov ecx, [ext2_data.log_block_size]
shl eax, cl
add eax, [PARTITION_START] ; а старт раздела - в терминах hdd (512)
;eax - указывает на таблицу inode-ов на hdd
mov ecx, eax ;сохраним его пока в ecx
; прибавим локальный адрес inode-а
pop eax ; index
mul [ext2_data.inode_size] ; (index * inode_size)
mov ebp, 512
div ebp ;поделим на размер блока
add eax, ecx ;нашли адрес блока для чтения
mov ebx, [ext2_data.ext2_temp_block]
call hd_read
mov esi, edx ;добавим "остаток"
add esi, ebx ;к адресу
mov ecx, [ext2_data.inode_size]
rep movsb ;копируем inode
popad
ret
;----------------------------------------------------------------
ext2_upcase:
cmp al, 'a'
jb .ret
cmp al, 'z'
ja .ret
and al, 0xDF ; upcase = clear 0010 0000
.ret:
ret
;----------------------------------------------------------------
; in: esi -> children
; ebx -> pointer to dir block
; out: esi -> name without parent or not_changed
; ebx -> dir_rec of inode children or trash
ext2_test_block_by_name:
push eax ecx edx edi
mov edx, ebx
add edx, [ext2_data.block_size] ;запомним конец блока
.start_rec:
cmp [ebx + EXT2_DIR_STRUC.inode], 0
jz .next_rec
; test [ebx + EXT2_DIR_STRUC.file_type], EXT2_FT_DIR
; jz .next_rec
push esi
movzx ecx, [ebx + EXT2_DIR_STRUC.name_len]
lea edi, [ebx + EXT2_DIR_STRUC.name]
inc ecx
@@:
dec ecx
jecxz .test_find
lodsb
mov ah, [edi]
inc edi
call ext2_upcase
xchg al, ah
call ext2_upcase
cmp al, ah
je @B
@@: ;не подошло
pop esi
.next_rec:
movzx eax, [ebx + EXT2_DIR_STRUC.rec_len]
add ebx, eax ;к след. записи
cmp ebx, edx ;проверим конец ли
jne .start_rec
jmp .ret
.test_find:
cmp byte [esi], 0
je .find ;нашли конец
cmp byte [esi], '/'
jne @B
inc esi
.find:
pop eax ;удаляем из стека сохраненое значение
; mov ebx, [ebx + EXT2_DIR_STRUC.inode]
.ret:
pop edi edx ecx eax
ret
;----------------------------------------------------------------
;
; ext2_HdReadFolder - read disk folder
;
; esi points to filename
; ebx pointer to structure 32-bit number = first wanted block, 0+
; & flags (bitfields)
; flags: bit 0: 0=ANSI names, 1=UNICODE names
; ecx number of blocks to read, 0+
; edx mem location to return data
;
; ret ebx = blocks read or 0xffffffff folder not found
; eax = 0 ok read or other = errormsg
;
;--------------------------------------------------------------
uglobal
EXT2_files_in_folder dd ? ;всего файлов в папке
EXT2_read_in_folder dd ? ;сколько файлов "считали"
EXT2_end_block dd ? ;конец очередного блока папки
EXT2_counter_blocks dd ?
endg
ext2_HdReadFolder:
mov ebp, [ext2_data.root_inode]
mov [EXT2_read_in_folder], ebx
mov [EXT2_files_in_folder], ecx ;сохраним регистры
.next_folder:
cmp byte [esi], 0
jz .get_folder
or [EXT2_counter_blocks], -1 ;счетчик блоков папки cur block of inode
mov eax, [ebp + EXT2_INODE_STRUC.i_blocks] ;убывающий счетчик блоков
add eax, [ext2_data.count_block_in_block]
mov [EXT2_end_block], eax
.next_block_folder:
mov eax, [ext2_data.count_block_in_block]
sub [EXT2_end_block], eax
jz .not_found
inc [EXT2_counter_blocks]
mov ecx, [EXT2_counter_blocks]
call ext2_get_inode_block
mov eax, ecx
mov ebx, [ext2_data.ext2_save_block] ;ebx = cur dir record
call ext2_get_block
mov eax, esi
call ext2_test_block_by_name
cmp eax, esi ;нашли имя?
je .next_block_folder
cmp [ebx + EXT2_DIR_STRUC.file_type], EXT2_FT_DIR
jne .not_found ;нашли, но это не папка
mov eax, [ebx + EXT2_DIR_STRUC.inode]
mov ebx, [ext2_data.ext2_save_inode] ;все же папка.
call ext2_get_inode
mov ebp, ebx
jmp .next_folder
.not_found:
or ebx, -1
mov eax, ERROR_FILE_NOT_FOUND
ret
;--------------------------------------------- final step
; in ebp - pointer to final inode (folder).
.get_folder:
push edx ;заголовок будем заполнять в конце (адрес - в стеке) edx
push [EXT2_read_in_folder] ;сохраненный регистр тоже в стек
mov edi, [EXT2_files_in_folder] ;edi = число блоков для чтения
and [EXT2_read_in_folder], 0
and [EXT2_files_in_folder], 0
mov esi, [ebp + EXT2_INODE_STRUC.i_blocks]
mov [EXT2_counter_blocks], esi
add edx, 32 ;заголовок будем заполнять в конце (адрес - в стеке) edx = current mem for return
xor esi, esi ;esi = номер блока по порядку
.new_block_folder: ;reserved label
mov ecx, esi ; получим номер блока
call ext2_get_inode_block
mov eax, ecx
mov ebx, [ext2_data.ext2_save_block]
call ext2_get_block ; и считываем блок с hdd
mov eax, ebx ; eax = current dir record
add ebx, [ext2_data.block_size]
mov [EXT2_end_block], ebx ; запомним конец очередного блока
pop ecx
mov ecx, [ecx] ; ecx = first wanted (flags ommited)
.find_wanted_start:
jecxz .find_wanted_end
.find_wanted_cycle:
cmp [eax + EXT2_DIR_STRUC.inode], 0 ; if (inode = 0) => not used
je @F
inc [EXT2_files_in_folder]
@@:
movzx ebx, [eax+EXT2_DIR_STRUC.rec_len]
add eax, ebx ; к следующей записи
cmp eax, [EXT2_end_block] ; проверяем "конец"
je .end_block_find_wanted
loop .find_wanted_cycle
.find_wanted_end:
mov ecx, edi
.wanted_start: ; ищем first_wanted+count
jecxz .wanted_end
.wanted_cycle:
cmp [eax + EXT2_DIR_STRUC.inode], 0 ; if (inode = 0) => not used
jz .empty_rec
inc [EXT2_files_in_folder]
inc [EXT2_read_in_folder]
test [eax + EXT2_DIR_STRUC.file_type], EXT2_FT_DIR ;папка или нет
jnz @F
push eax ;получим размер, если это файл
mov eax, [eax + EXT2_DIR_STRUC.inode]
mov ebx, [ext2_data.ext2_temp_inode]
call ext2_get_inode
mov eax, [ebx + EXT2_INODE_STRUC.i_size] ;low size
mov ebx, [ebx + EXT2_INODE_STRUC.i_dir_acl] ;high size
mov dword [edx+32], eax
mov dword [edx+36], ebx
xor dword [edx], FS_FT_DIR ; для файлов xor - 2 раза
pop eax
@@:
xor dword [edx], FS_FT_DIR
mov dword [edx+4], FS_FT_ASCII ; symbol type in name
push ecx esi ;copy name
movzx ecx, [eax + EXT2_DIR_STRUC.name_len]
mov edi, edx
add edi, 40
lea esi, [eax + EXT2_DIR_STRUC.name]
rep movsb
pop esi ecx
and byte [edi], 0
add edx, 40 + 264 ; go to next record
.empty_rec:
movzx ebx, [eax + EXT2_DIR_STRUC.rec_len]
add eax, ebx
cmp eax, [EXT2_end_block]
je .end_block_wanted
loop .wanted_cycle
.wanted_end: ;теперь дойдем до конца чтобы узнать сколько файлов в папке
or ecx, -1 ;цикл уже есть, просто поставим ему огромный счетчик
jmp .find_wanted_cycle
.end_block_find_wanted: ;вылетили из цикла find_wanted
mov ebx, [ext2_data.count_block_in_block]
sub [EXT2_counter_blocks], ebx
jz .end_dir
;получаем новый блок
inc esi
push ecx
mov ecx, esi
call ext2_get_inode_block
mov eax, ecx
mov ebx, [ext2_data.ext2_save_block]
call ext2_get_block
pop ecx
dec ecx
mov eax, ebx
add ebx, [ext2_data.block_size]
mov [EXT2_end_block], ebx
jmp .find_wanted_start
.end_block_wanted: ;вылетели из цикла wanted
mov ebx, [ext2_data.count_block_in_block]
sub [EXT2_counter_blocks], ebx
jz .end_dir
inc esi
push ecx
mov ecx, esi
call ext2_get_inode_block
mov eax, ecx
mov ebx, [ext2_data.ext2_save_block]
call ext2_get_block
pop ecx
dec ecx
mov eax, ebx
add ebx, [ext2_data.block_size]
mov [EXT2_end_block], ebx
jmp .wanted_start
.end_dir:
pop edx
mov ebx, [EXT2_read_in_folder]
mov ecx, [EXT2_files_in_folder]
mov dword [edx], 1 ;version
xor eax, eax
mov [edx+4], ebx
mov [edx+8], ecx
lea edi, [edx + 12]
mov ecx, 20 / 4
rep stosd
ret
;====================== end ext2_HdReadFolder
;----------------------------------------------------------------
;
; ext2_HdRead - read hard disk
;
; esi points to filename
; ebx pointer to 64-bit number = first wanted byte, 0+
; may be ebx=0 - start from first byte
; ecx number of bytes to read, 0+
; edx mem location to return data
;
; ret ebx = bytes read or 0xffffffff file not found
; eax = 0 ok read or other = errormsg
;
;--------------------------------------------------------------
ext2_HdRead:
mov ebp, [ext2_data.root_inode]
push ecx edx ebx
.next_folder:
push esi
@@:
lodsb
test al, al
jz .find_end
cmp al, '/'
jz .find_folder
jmp @B
.find_end:
;установим флаг что ищем файл или очередную папку
mov edi, 1
jmp .find_any
.find_folder:
xor edi, edi
.find_any:
pop esi
cmp byte [esi], 0
jz .not_found
or [EXT2_counter_blocks], -1 ;счетчик блоков папки cur block of inode
mov eax, [ebp + EXT2_INODE_STRUC.i_blocks] ;убывающий счетчик блоков
add eax, [ext2_data.count_block_in_block]
mov [EXT2_end_block], eax
.next_block_folder:
mov eax, [ext2_data.count_block_in_block]
sub [EXT2_end_block], eax
jz .not_found
inc [EXT2_counter_blocks]
mov ecx, [EXT2_counter_blocks]
call ext2_get_inode_block
mov eax, ecx
mov ebx, [ext2_data.ext2_save_block] ;ebx = cur dir record
call ext2_get_block
mov eax, esi
call ext2_test_block_by_name
cmp eax, esi ;нашли имя?
je .next_block_folder
cmp [ebx + EXT2_DIR_STRUC.file_type], EXT2_FT_REG_FILE
je .test_file
cmp [ebx + EXT2_DIR_STRUC.file_type], EXT2_FT_DIR
jne .not_found
.test_dir:
cmp edi, 0
jne .this_is_folder
mov eax, [ebx + EXT2_DIR_STRUC.inode]
mov ebx, [ext2_data.ext2_save_inode] ;все же папка.
call ext2_get_inode
mov ebp, ebx
jmp .next_folder
.test_file:
cmp edi, 0
je .not_found
mov eax, [ebx + EXT2_DIR_STRUC.inode]
mov ebx, [ext2_data.ext2_save_inode]
call ext2_get_inode
jmp .get_file
.not_found:
pop edx ecx ebx
or ebx, -1
mov eax, ERROR_FILE_NOT_FOUND
ret
.this_is_folder:
pop edx ecx ebx
or ebx, -1
mov eax, ERROR_ACCESS_DENIED
.end_read:
ret
;-----------------------------------------------------------------------------final step
.get_file:
xchg bx, bx
mov ebp ,ebx
;pop eax edi ecx ; первый_блок память кол-во_байт
mov esi, [esp]
mov edi, [esp + 8] ;edi = нужно считать байт
;///// сравним хватит ли нам файла или нет
mov ebx, [esi+4]
mov eax, [esi] ; ebx : eax - стартовый номер байта
mov edx, [ebp + EXT2_INODE_STRUC.i_dir_acl]
mov ecx, [ebp + EXT2_INODE_STRUC.i_size] ;edx : ecx - размер файла
cmp edx, ebx
ja .size_great
jb .size_less
cmp ecx, eax
ja .size_great
.size_less:
add esp, 12
mov ebx, 0
mov eax, 6 ;EOF
ret
.size_great:
;прибавим к старту кол-во байт для чтения
add eax, edi
jnc @F
inc ebx
@@:
cmp edx, ebx
ja .size_great_great
jb .size_great_less
cmp ecx, eax
jae .size_great_great
;jmp .size_great_less
; а если равно, то не важно куда
.size_great_less:
or [EXT2_files_in_folder], 1 ;читаем по границе размера
sub ecx, [esi]
pop eax edi edx ;ecx - не меняем
jmp @F
.size_great_great:
and [EXT2_files_in_folder], 0 ;читаем нормально
pop eax edi ecx
@@:
push ecx ;сохраним размер считанных байт в стеке
test eax, eax
je .zero_start
;пока делаем п..ц криво =)
mov edx, [eax+4]
mov eax, [eax]
div [ext2_data.block_size]
mov [EXT2_counter_blocks], eax ;номер блока запоминаем
push ecx
mov ecx, eax
call ext2_get_inode_block
mov ebx , [ext2_data.ext2_save_block]
mov eax, ecx
call ext2_get_block
pop ecx
add ebx, edx
neg edx
add edx,[ext2_data.block_size] ;block_size - стартоый блок = сколько байт 1-го блока
cmp ecx, edx
jbe .only_one_block
mov eax, ecx
sub eax, edx
mov ecx, edx
mov esi, ebx
rep movsb ;кусок 1-го блока
.zero_start:
mov ebx, edi ;чтение блока прям в ebx
;теперь в eax кол-во оставшихся байт для чтения
xor edx, edx
div [ext2_data.block_size]
mov [EXT2_end_block], eax ;кол-во целых блоков
@@:
cmp [EXT2_end_block], 0
jz .finish_block
inc [EXT2_counter_blocks]
mov ecx, [EXT2_counter_blocks]
call ext2_get_inode_block
mov eax, ecx ;а ebx уже забит нужным значением
call ext2_get_block
add ebx, [ext2_data.block_size]
dec [EXT2_end_block]
jmp @B
.finish_block: ;в edx - кол-во байт в последнем блоке
cmp edx, 0
je .end_read
mov ecx, [EXT2_counter_blocks]
inc ecx
call ext2_get_inode_block
mov edi, ebx
mov eax, ecx
mov ebx, [ext2_data.ext2_save_block]
call ext2_get_block
mov ecx, edx
.only_one_block:
mov esi, ebx
rep movsb ;кусок 1-го блока (последнего)
pop ebx
cmp [EXT2_files_in_folder], 0
jz @F
mov eax, 6 ;EOF
ret
@@:
xor eax, eax
ret
;========================
ext2_HdRewrite:
; xchg bx, bx
xor ebx, ebx
mov eax, ERROR_UNSUPPORTED_FS
ret
ext2_HdWrite:
; xchg bx, bx
xor ebx, ebx
mov eax, ERROR_UNSUPPORTED_FS
ret
ext2_HdSetFileEnd:
; xchg bx, bx
xor ebx, ebx
mov eax, ERROR_UNSUPPORTED_FS
ret
ext2_HdGetFileInfo:
; xchg bx, bx
xor ebx, ebx
mov eax, ERROR_UNSUPPORTED_FS
ret
ext2_HdSetFileInfo:
; xchg bx, bx
xor ebx, ebx
mov eax, ERROR_UNSUPPORTED_FS
ret
ext2_HdDelete:
; xchg bx, bx
xor ebx, ebx
mov eax, ERROR_UNSUPPORTED_FS
ret

18
kernel/trunk/fs/fat32.inc
View File

@ -169,7 +169,6 @@ reserve_hd_channel:
call clear_hd_cache
@@:
pop eax
sti
.ret:
ret
@ -1049,6 +1048,8 @@ fs_HdRead:
jz @f
cmp [fs_type], 1
jz ntfs_HdRead
cmp [fs_type], 2
jz ext2_HdRead
or ebx, -1
mov eax, ERROR_UNKNOWN_FS
ret
@ -1200,6 +1201,8 @@ fs_HdRead:
fs_HdReadFolder:
cmp [fs_type], 1
jz ntfs_HdReadFolder
cmp [fs_type], 2
jz ext2_HdReadFolder
cmp [fs_type], 16
jz @f
cmp [fs_type], 32
@ -1586,6 +1589,8 @@ fs_HdRewrite:
.common:
cmp [fs_type], 1
jz ntfs_HdRewrite
cmp [fs_type], 2
jz ext2_HdRewrite
cmp [fs_type], 16
jz @f
cmp [fs_type], 32
@ -2120,6 +2125,8 @@ fs_HdWrite.ret11:
fs_HdWrite:
cmp [fs_type], 1
jz ntfs_HdWrite
cmp [fs_type], 2
jz ext2_HdWrite
cmp [fs_type], 16
jz @f
cmp [fs_type], 32
@ -2463,6 +2470,8 @@ hd_extend_file:
fs_HdSetFileEnd:
cmp [fs_type], 1
jz ntfs_HdSetFileEnd
cmp [fs_type], 2
jz ext2_HdSetFileEnd
cmp [fs_type], 16
jz @f
cmp [fs_type], 32
@ -2695,6 +2704,8 @@ fs_HdSetFileEnd:
fs_HdGetFileInfo:
cmp [fs_type], 1
jz ntfs_HdGetFileInfo
cmp [fs_type], 2
jz ext2_HdGetFileInfo
cmp [fs_type], 16
jz @f
cmp [fs_type], 32
@ -2723,6 +2734,8 @@ fs_HdGetFileInfo:
fs_HdSetFileInfo:
cmp [fs_type], 1
jz ntfs_HdSetFileInfo
cmp [fs_type], 2
jz ext2_HdSetFileInfo
cmp [fs_type], 16
jz @f
cmp [fs_type], 32
@ -2773,6 +2786,8 @@ fs_HdSetFileInfo:
fs_HdDelete:
cmp [fs_type], 1
jz ntfs_HdDelete
cmp [fs_type], 1
jz ext2_HdDelete
cmp [fs_type], 16
jz @f
cmp [fs_type], 32
@ -2916,3 +2931,4 @@ fs_HdDelete:
ret
; \end{diamond}

3
kernel/trunk/fs/fs.inc
View File

@ -388,7 +388,7 @@ choice_necessity_partition_1:
.s:
sub eax,ebx
.f:
add eax,[fat32part]
add eax, [known_part] ; add eax,[fat32part]
dec eax
xor edx,edx
imul eax,100
@ -795,3 +795,4 @@ error:
partition_string: dd 0
db 32

14
kernel/trunk/fs/fs_lfn.inc
View File

@ -105,6 +105,11 @@ file_system_lfn:
; 9 : create directory
; parse file name
cmp dword [eax], 1
jne @F
;xchg bx,bx
@@:
;up to file_system_lfn - TEMP!!!
xchg ebx, eax
lea esi, [ebx+20]
lodsb
@ -169,8 +174,8 @@ file_system_lfn:
cmp dword [ebx], 1
jnz .access_denied
xor eax, eax
mov ebp, [ebx+12]
mov edx, [ebx+16]
mov ebp, [ebx+12] ;количество блоков для считывания
mov edx, [ebx+16] ;куда записывать рузельтат
; add edx, std_application_base_address
push dword [ebx+4] ; first block
mov ebx, [ebx+8] ; flags
@ -182,7 +187,7 @@ file_system_lfn:
pop ecx
mov byte [edx], 1 ; version
.maindir_loop:
call esi
call esi ;!!!!!!!!!!!!!!!!!!
jc .maindir_done
inc dword [edx+8]
dec dword [esp]
@ -537,7 +542,7 @@ fs_OnHdAndBd:
mov dword [image_of_eax], 5 ; not found
ret
@@:
mov [fat32part], ecx
mov [known_part], ecx ; mov [fat32part], ecx
push ebx esi
call choice_necessity_partition_1
pop esi ebx
@ -1143,3 +1148,4 @@ get_full_file_name:
jz .ret.ok
mov byte [edi-1], '/'
jmp .set_copy_cont

6
kernel/trunk/fs/ntfs.inc
View File

@ -95,8 +95,8 @@ ntfs_test_bootsec:
ntfs_setup: ; CODE XREF: part_set.inc
; By given bootsector, initialize some NTFS variables
call ntfs_test_bootsec
jc problem_fat_dec_count
; call ntfs_test_bootsec
; jc problem_fat_dec_count
movzx eax, byte [ebx+13]
mov [ntfs_data.sectors_per_cluster], eax
mov eax, [ebx+0x28]
@ -1268,6 +1268,7 @@ ntfs_HdRead:
;
;--------------------------------------------------------------
ntfs_HdReadFolder:
xchg bx, bx
mov eax, 5 ; root cluster
cmp byte [esi], 0
jz .doit
@ -1813,3 +1814,4 @@ ntfs_HdGetFileInfo:
pop edi esi
xor eax, eax
ret

136
kernel/trunk/fs/part_set.inc
View File

@ -26,7 +26,7 @@ align 4
;******************************************************
PARTITION_START dd 0x3f
PARTITION_END dd 0
fs_type db 0 ; 0=none, 1=NTFS, 16=FAT16, 32=FAT32
fs_type db 0 ; 0=none, 1=NTFS, 2=EXT2/3, 16=FAT16, 32=FAT32
align 4
fs_dependent_data_start:
@ -78,6 +78,28 @@ ERROR: increase sizeof(fs_dependent_data)!
end if
end virtual
virtual at fs_dependent_data_start
; EXT2 data
ext2_data:
.log_block_size dd ?
.block_size dd ?
.count_block_in_block dd ?
.blocks_per_group dd ?
.inodes_per_group dd ?
.global_desc_table dd ?
.root_inode dd ? ; pointer to root inode in memory
.inode_size dd ?
.count_pointer_in_block dd ? ; block_size / 4
.count_pointer_in_block_square dd ? ; (block_size / 4)**2
.ext2_save_block dd ? ; ¡«®ª ­  £«®¡ «ì­ãî 1 ¯à®æ¥¤ãàã
.ext2_temp_block dd ? ; ¡«®ª ¤«ï ¬¥«ª¨å ¯à®æ¥¤ãà
.ext2_save_inode dd ? ; inode ­  £«®¡ «ì­ãî ¯à®æ¥¤ãàã
.ext2_temp_inode dd ? ; inode ¤«ï ¬¥«ª¨å ¯à®æ¥¤ãà
if $ > fs_dependent_data_end
ERROR: increase sizeof(fs_dependent_data)!
end if
end virtual
;***************************************************************************
; End place
; Mario79
@ -104,7 +126,8 @@ iglobal
db 0xd4 ; Old Multiuser DOS secured: fat16 <32M
db 0xd6 ; Old Multiuser DOS secured: fat16 >32M
db 0x07 ; NTFS
db 0x27 ; NTFS, hidden
db 0x17 ; NTFS, hidden
db 0x83 ; Linux native file system (ext2fs)
partition_types_end:
@ -118,17 +141,15 @@ iglobal
endg
; Partition chain used:
; MBR ; PARTITION2 ; PARTITION3 ; PARTITION4
;==========================================================
; fat16/32 +-- fat16/32 +-- fat16/32 +-- fat16/32 +--
; extended --+ extended --+ extended --+ extended --+
; 0 0 0 0
; 0 0 0 0
; Notes:
; - extended partition need to be in second entry on table
; - it will skip over removed partitions
; MBR <---------------------
; | |
; |-> PARTITION1 |
; |-> EXTENDED PARTITION - ;not need be second partition
; |-> PARTITION3
; |-> PARTITION4
set_FAT32_variables:
set_PARTITION_variables:
set_FAT32_variables: ;deprecated
mov [problem_partition],0
call reserve_hd1
call reserve_hd_channel
@ -139,12 +160,12 @@ set_FAT32_variables:
je problem_hd
xor ecx,ecx ; partition count
mov edx,-1 ; flag for partition
xor eax,eax ; read MBR
or edx,-1 ; flag for partition
xor eax,eax ; address MBR
xor ebp,ebp ; extended partition start
new_partition:
test ebp,ebp ; is there extended partition?
new_mbr:
test ebp,ebp ; is there extended partition? (MBR or EMBR)
jnz extended_already_set ; yes
xchg ebp,eax ; no. set it now
@ -158,26 +179,25 @@ extended_already_set:
cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
jnz end_partition_chain
cmp dword [ebx+0x1be+0xc],0 ; skip over empty partition
; jz next_partition
jnz .next_primary_partition
jnz test_primary_partition_0
cmp dword [ebx+0x1be+0xc+16],0
jnz next_primary_partition
jnz test_primary_partition_1
cmp dword [ebx+0x1be+0xc+16+16],0
jnz next_primary_partition_1
jnz test_primary_partition_2
cmp dword [ebx+0x1be+0xc+16+16+16],0
jnz next_primary_partition_2
jmp next_partition
jnz test_primary_partition_3
jmp end_partition_chain
.next_primary_partition:
test_primary_partition_0:
push eax
mov al,[ebx+0x1be+4] ; get primary partition type
call scan_partition_types
pop eax
jnz next_primary_partition ; no. skip over
jnz test_primary_partition_1 ; no. skip over
inc ecx
cmp ecx,[fat32part] ; is it wanted partition?
jnz next_primary_partition ; no
cmp ecx,[known_part] ; is it wanted partition?
jnz test_primary_partition_1 ; no
mov edx, eax ; start sector
add edx, [ebx+0x1be+8] ; add relative start
@ -190,16 +210,16 @@ extended_already_set:
mov [fs_type], dl ; save for FS recognizer (separate FAT vs NTFS)
pop edx
next_primary_partition:
test_primary_partition_1:
push eax
mov al,[ebx+0x1be+4+16] ; get primary partition type
call scan_partition_types
pop eax
jnz next_primary_partition_1 ; no. skip over
jnz test_primary_partition_2 ; no. skip over
inc ecx
cmp ecx,[fat32part] ; is it wanted partition?
jnz next_primary_partition_1 ; no
cmp ecx,[known_part] ; is it wanted partition?
jnz test_primary_partition_2 ; no
mov edx, eax
add edx, [ebx+0x1be+8+16]
@ -211,16 +231,16 @@ next_primary_partition:
mov [fs_type], dl
pop edx
next_primary_partition_1:
test_primary_partition_2:
push eax
mov al,[ebx+0x1be+4+16+16] ; get primary partition type
call scan_partition_types
pop eax
jnz next_primary_partition_2 ; no. skip over
jnz test_primary_partition_3 ; no. skip over
inc ecx
cmp ecx,[fat32part] ; is it wanted partition?
jnz next_primary_partition_2 ; no
cmp ecx,[known_part] ; is it wanted partition?
jnz test_primary_partition_3 ; no
mov edx, eax
add edx, [ebx+0x1be+8+16+16]
@ -232,16 +252,16 @@ next_primary_partition_1:
mov [fs_type], dl
pop edx
next_primary_partition_2:
test_primary_partition_3:
push eax
mov al,[ebx+0x1be+4+16+16+16] ; get primary partition type
call scan_partition_types
pop eax
jnz next_partition ; no. skip over
jnz test_ext_partition_0 ; no. skip over
inc ecx
cmp ecx,[fat32part] ; is it wanted partition?
jnz next_partition ; no
cmp ecx,[known_part] ; is it wanted partition?
jnz test_ext_partition_0 ; no
mov edx, eax
add edx, [ebx+0x1be+8+16+16+16]
@ -253,40 +273,40 @@ next_primary_partition_2:
mov [fs_type], dl
pop edx
next_partition:
test_ext_partition_0:
push eax
mov al,[ebx+0x1be+4] ; get extended partition type
call scan_extended_types
pop eax
jnz next_partition_1
jnz test_ext_partition_1
mov eax,[ebx+0x1be+8] ; add relative start
test eax,eax ; is there extended partition?
jnz new_partition ; yes. read it
jnz new_mbr ; yes. read it
next_partition_1:
test_ext_partition_1:
push eax
mov al,[ebx+0x1be+4+16] ; get extended partition type
call scan_extended_types
pop eax
jnz next_partition_2
jnz test_ext_partition_2
mov eax,[ebx+0x1be+8+16] ; add relative start
test eax,eax ; is there extended partition?
jnz new_partition ; yes. read it
jnz new_mbr ; yes. read it
next_partition_2:
test_ext_partition_2:
push eax
mov al,[ebx+0x1be+4+16+16] ; get extended partition type
call scan_extended_types
pop eax
jnz next_partition_3
jnz test_ext_partition_3
mov eax,[ebx+0x1be+8+16+16] ; add relative start
test eax,eax ; is there extended partition?
jnz new_partition ; yes. read it
jnz new_mbr ; yes. read it
next_partition_3:
test_ext_partition_3:
push eax
mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type
call scan_extended_types
@ -295,7 +315,7 @@ next_partition_3:
mov eax,[ebx+0x1be+8+16+16+16] ; get start of extended partition
test eax,eax ; is there extended partition?
jnz new_partition ; yes. read it
jnz new_mbr ; yes. read it
end_partition_chain:
mov [partition_count],ecx
@ -366,15 +386,22 @@ hd_and_partition_ok:
add eax, [PARTITION_START]
call hd_read
cmp [hd_error], 0
jnz problem_fat_dec_count ; ­¥ áã¤ì¡ ...
jnz problem_fat_dec_count ; no chance...
boot_read_ok:
; mov [hd_setup], 0
; if we are running on NTFS, check bootsector
; cmp [fs_type], 7
; jz ntfs_setup
call ntfs_test_bootsec
call ntfs_test_bootsec ; test ntfs
jnc ntfs_setup
call ext2_test_superblock ; test ext2fs
jnc ext2_setup
mov eax, [PARTITION_START] ;ext2 test changes [buffer]
call hd_read
cmp [hd_error], 0
jnz problem_fat_dec_count
cmp word [ebx+0x1fe],0xaa55 ; is it valid boot sector?
jnz problem_fat_dec_count
@ -479,3 +506,4 @@ fat16_partition:
call free_hd_channel
mov [hd1_status],0 ; free
ret

2
kernel/trunk/kernel32.inc
View File

@ -217,6 +217,7 @@ include "fs/fat12.inc" ; read / write for fat12 filesystem
include "blkdev/rd.inc" ; ramdisk read /write
include "fs/fs_lfn.inc" ; syscall, version 2
include "fs/iso9660.inc" ; read for iso9660 filesystem CD
include "fs/ext2.inc" ; read / write for ext2 filesystem
; sound
@ -286,3 +287,4 @@ include "core/ext_lib.inc"
; list of external functions
include "imports.inc"