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NTFS fix

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git-svn-id: svn://kolibrios.org@6781 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
pathoswithin 2016-12-04 10:56:24 +00:00
parent 9a564b1fbf
commit d3eb673c05
1 changed files with 35 additions and 37 deletions
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72
kernel/trunk/fs/ntfs.inc
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@ -3192,16 +3192,18 @@ ntfsSpaceAlloc:
; out:
; [ebp+NTFS.fileDataStart] = allocated block starting cluster
; CF=1 -> disk full
push eax
mov ecx, [ebp+NTFS.BitmapBuffer]
add edi, ecx
add ecx, [ebp+NTFS.BitmapSize]
sub ecx, edi
jnc @f
ja @f
push eax
call bitmapBuffering
pop eax
shl ecx, 2
@@:
shr ecx, 2
push ecx
mov eax, [ebp+NTFS.fileDataSize]
shr eax, 5
jz .small
@ -3254,59 +3256,56 @@ ntfsSpaceAlloc:
add esp, 8
jmp .start
.small: ; less than 32 clusters
mov eax, -1
repz scasd ; search for zero bits
test ecx, ecx
jnz @f
call bitmapBuffering
jmp .small
@@:
sub edi, 4
mov eax, [edi]
call bitmapBuffering
push ecx
.small: ; less than 32 clusters
pop ecx
or eax, -1
repz scasd
jecxz @b
push ecx
mov eax, [edi-4]
not eax
@@:
bsf ebx, eax ; first 0
jz .again
bsf ecx, eax ; first 0
jz .small
not eax
shr eax, cl
shl eax, cl
bsf edx, eax ; next 1
jz @f
sub edx, ebx
sub edx, ecx
cmp edx, [ebp+NTFS.fileDataSize]
jnc .got ; fits inside
bsf ebx, eax
bsf ecx, eax
not eax
shr eax, cl
shl eax, cl
jmp @b
@@: ; next dword
mov eax, [edi+4]
mov eax, [edi]
bsf edx, eax
jz .got ; empty
add edx, 32
sub edx, ebx
sub edx, ecx
cmp edx, [ebp+NTFS.fileDataSize]
jnc .got ; share between dwords
.again:
add edi, 4
jmp .small
jc .small
.got:
push ebx ; starting bit
sub edi, 4
push ecx ; starting bit
push edi ; starting dword
.done: ; mark space
mov ecx, [esp+4]
pop edi ecx
cmp ecx, 32
jc @f
xor ecx, ecx
add dword [esp], 4
mov [esp+4], ecx
add edi, 4
@@:
mov edi, [esp]
xor eax, eax
dec eax
push ecx edi
or eax, -1
shr eax, cl
shl eax, cl
neg ecx
@ -3324,8 +3323,7 @@ ntfsSpaceAlloc:
push ecx
shr ecx, 5
add edi, 4
xor eax, eax
dec eax
or eax, -1
rep stosd
pop ecx
and ecx, 31
@ -3362,7 +3360,6 @@ ntfsSpaceFree:
mov eax, edi
add eax, ebx
shr eax, 3
inc eax
cmp eax, [ebp+NTFS.BitmapSize]
jc @f
add eax, [ebp+NTFS.BitmapBuffer]
@ -3447,17 +3444,18 @@ bitmapBuffering:
call fs_read64_app
test eax, eax
jnz .err
add [ebp+NTFS.BitmapSize], 8000h
mov eax, [ebp+NTFS.BitmapTotalSize]
cmp eax, [ebp+NTFS.BitmapSize]
mov eax, [ebp+NTFS.BitmapSize]
add eax, 8000h
cmp [ebp+NTFS.BitmapTotalSize], eax
jnc @f
mov [ebp+NTFS.BitmapSize], eax
mov eax, [ebp+NTFS.BitmapTotalSize]
@@:
mov [ebp+NTFS.BitmapSize], eax
pop ebx
mov ecx, [ebp+NTFS.BitmapBuffer]
add ecx, [ebp+NTFS.BitmapSize]
add ecx, eax
sub ecx, edi
jc bitmapBuffering
jbe bitmapBuffering
shr ecx, 2
ret