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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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154
kernel/trunk/fs/part_set.inc
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@@ -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:
@@ -55,7 +55,7 @@ fs_dependent_data_end:
file_system_data_size = $ - PARTITION_START
if file_system_data_size > 96
ERROR: sizeof(file system data) too big!
end if
end if
virtual at fs_dependent_data_start
; NTFS data
@@ -76,8 +76,30 @@ ntfs_data:
if $ > fs_dependent_data_end
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 ? ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> 1 <EFBFBD><EFBFBD><EFBFBD>楤<EFBFBD><EFBFBD><EFBFBD>
.ext2_temp_block dd ? ; <EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>楤<EFBFBD><EFBFBD>
.ext2_save_inode dd ? ; inode <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>楤<EFBFBD><EFBFBD><EFBFBD>
.ext2_temp_inode dd ? ; inode <EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>楤<EFBFBD><EFBFBD>
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
set_FAT32_variables:
; MBR <---------------------
; | |
; |-> PARTITION1 |
; |-> EXTENDED PARTITION - ;not need be second partition
; |-> PARTITION3
; |-> PARTITION4
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
.next_primary_partition:
jnz test_primary_partition_3
jmp end_partition_chain
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
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
next_partition_3:
jnz new_mbr ; yes. read it
test_ext_partition_3:
push eax
mov al,[ebx+0x1be+4+16+16+16] ; get extended partition type
call scan_extended_types
@@ -295,8 +315,8 @@ 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
@@ -366,14 +386,21 @@ hd_and_partition_ok:
add eax, [PARTITION_START]
call hd_read
cmp [hd_error], 0
jnz problem_fat_dec_count ; <EFBFBD><EFBFBD> <EFBFBD><EFBFBD><EFBFBD>졠...
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
jnc ntfs_setup
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
@@ -478,4 +505,5 @@ fat16_partition:
mov [fs_type],16 ; Fat16
call free_hd_channel
mov [hd1_status],0 ; free
ret
ret