keXa/kolibrios
1
0
Fork 0
forked from KolibriOS/kolibrios
Code Pull Requests Activity

NTFS: advanced file creation

Browse Source 
git-svn-id: svn://kolibrios.org@6407 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
pathoswithin 2016-04-26 00:41:42 +00:00
parent ea3f3441bb
commit 32f17daf2a
1 changed files with 98 additions and 84 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

182
kernel/trunk/fs/ntfs.inc
View File

@ -604,7 +604,6 @@ ntfs_read_attr:
mov eax, [ebp+NTFS.cur_iRecord]
mov [ebp+NTFS.attr_iRecord], eax
and [ebp+NTFS.attr_list], 0
or dword [ebp+NTFS.attr_size], -1
or dword [ebp+NTFS.attr_size+4], -1
or [ebp+NTFS.attr_iBaseRecord], -1
call ntfs_read_file_record
@ -707,7 +706,6 @@ ntfs_read_attr:
push [ebp+NTFS.cur_buf]
push dword [ebp+NTFS.attr_size]
push dword [ebp+NTFS.attr_size+4]
or dword [ebp+NTFS.attr_size], -1
or dword [ebp+NTFS.attr_size+4], -1
and [ebp+NTFS.cur_offs], 0
mov [ebp+NTFS.cur_size], 2
@ -756,9 +754,7 @@ ntfs_read_attr:
mov eax, [esi+8]
test eax, eax
jnz .testf
mov eax, dword [ebp+NTFS.attr_size]
and eax, dword [ebp+NTFS.attr_size+4]
cmp eax, -1
cmp dword [ebp+NTFS.attr_size+4], -1
jnz .testfz
; if attribute is in auxiliary records, its size is defined only in first
mov eax, [esi+10h]
@ -845,7 +841,6 @@ ntfs_read_attr:
push [ebp+NTFS.cur_buf]
push dword [ebp+NTFS.attr_size]
push dword [ebp+NTFS.attr_size+4]
or dword [ebp+NTFS.attr_size], -1
or dword [ebp+NTFS.attr_size+4], -1
mov [ebp+NTFS.cur_offs], edx
mov [ebp+NTFS.cur_size], 1
@ -907,10 +902,7 @@ ntfs_read_attr:
; Not all auxiliary records contain correct FileSize info
mov eax, dword [ebp+NTFS.attr_size]
mov edx, dword [ebp+NTFS.attr_size+4]
push eax
and eax, edx
cmp eax, -1
pop eax
cmp edx, -1
jnz @f
mov eax, [ecx+attributeRealSize]
mov edx, [ecx+attributeRealSize+4]
@ -1984,7 +1976,7 @@ ntfs_CreateFile:
mov [esi+recordRealSize], edx
shr ecx, 2
rep movsd
mov edi, [ebp+NTFS.attr_offs]
mov edi, [ebp+NTFS.indexRoot]
sub edi, [ebp+NTFS.frs_buffer]
add edi, [ebp+NTFS.cur_index_buf]
mov esi, [esp]
@ -2000,26 +1992,20 @@ ntfs_CreateFile:
jmp .common
.growTree:
sub eax, edi
sub eax, rootNode
sub eax, [edi+rootNode+indexOffset]
push eax
xchg [ebp+NTFS.secondIndexBuffer], edi
mov [ebp+NTFS.cur_index_buf], edi
; create indexRecord
mov ecx, 10
xor eax, eax
rep stosd
mov esi, [ebp+NTFS.attr_offs]
mov esi, [ebp+NTFS.indexRoot]
mov al, [esi+attributeOffset]
add esi, eax
mov al, [esi+indexRecordSizeClus]
mov [ebp+NTFS.fileDataSize], eax
rdtsc
stosw
mov eax, [esi+indexRecordSize]
cmp eax, [ebp+NTFS.frs_size]
jc .errorPop4
jc .errorPop3
shr eax, 9
inc eax
mov edi, [ebp+NTFS.cur_index_buf]
@ -2056,27 +2042,51 @@ ntfs_CreateFile:
mov byte [edi+nonLeafFlag], 1
mov byte [edi+16+indexAllocatedSize], 18h
mov byte [edi+16+indexFlags], 3
mov esi, [ebp+NTFS.attr_offs]
mov esi, [ebp+NTFS.indexRoot]
add edi, 28h
mov eax, edi
sub eax, esi
mov word [esi+sizeWithoutHeader], 38h
xchg [esi+sizeWithHeader], eax
cmp byte [esi+eax], -1
jnz .errorPop4
add esi, eax
mov [ebp+NTFS.attr_offs], edi
cmp byte [esi], 0xA0
jnz @f
cmp dword [esi+attributeAllocatedSize], 0
jz @f
mov eax, [ebp+NTFS.frs_buffer]
mov ecx, eax
add ecx, [eax+recordRealSize]
sub ecx, esi
shr ecx, 2
rep movsd
sub edi, eax
mov [eax+recordRealSize], edi
call .ntfsNodeAlloc
jc ntfsErrorPop3
mov eax, [ebp+NTFS.newRecord]
mov edi, [ebp+NTFS.cur_index_buf]
mov [edi+recordVCN], eax
mov edi, [ebp+NTFS.attr_offs]
mov [edi-8], eax
jmp .refresh
@@:
mov cl, 32
xor eax, eax
push edi
rep stosd
mov eax, [ebp+NTFS.cur_subnode_size]
cmp eax, [ebp+NTFS.cur_size]
jnz @f
mov al, 1
@@:
mov [ebp+NTFS.fileDataSize], eax
mov edi, [ebp+NTFS.BitmapStart]
call ntfsSpaceAlloc
jnc @f
add esp, 20
jmp ntfsDiskFull
@@: ; create $IndexAllocation
pop edi
mov [ebp+NTFS.attr_offs], edi
movi eax, ERROR_DISK_FULL
jc ntfsErrorPop3
; create $IndexAllocation
mov edi, [ebp+NTFS.attr_offs]
mov byte [edi+attributeType], 0xA0
mov byte [edi+nonResidentFlag], 1
mov byte [edi+nameLength], 4
@ -2121,24 +2131,31 @@ ntfs_CreateFile:
add edi, 30h
sub edi, esi
mov [esi+recordRealSize], edi
mov [ebp+NTFS.cur_buf], esi
call writeRecord ; fileRecord
mov eax, [ebp+NTFS.fileDataStart]
mul [ebp+NTFS.sectors_per_cluster]
mov [ebp+NTFS.LastRead], eax
jmp @f
.refresh:
mov [ebp+NTFS.cur_size], 0
mov dword [ebp+NTFS.attr_size+4], -1
call ntfs_read_attr.continue
movi eax, ERROR_FS_FAIL
jc ntfsErrorPop3
@@:
mov eax, [ebp+NTFS.cur_index_buf]
mov [ebp+NTFS.cur_buf], eax
call writeRecord ; indexRecord
mov ebx, [ebp+NTFS.cur_index_buf]
mov ax, [ebx+updateSequenceSize]
dec eax
shl eax, 9
call ntfs_restore_usa
call writeRecord
mov eax, [ebp+NTFS.rootLastRead]
mov [ebp+NTFS.LastRead], eax
mov eax, [ebp+NTFS.frs_buffer]
mov [ebp+NTFS.cur_buf], eax
call writeRecord
mov esi, [esp+4]
stdcall ntfs_find_lfn.doit2, 0
test eax, eax
jz .errorPop3
mov edi, [ebp+NTFS.cur_index_buf]
pop eax
add eax, recordNode
add eax, edi
add eax, [edi+recordNode+indexOffset]
mov edx, [esp]
.indexRecord:
add edi, recordNode
@ -2148,28 +2165,50 @@ ntfs_CreateFile:
mov [edi+nodeRealSize], edx
jmp .common
.errorPop4:
pop eax
.errorPop3:
add esp, 12
jmp ntfsUnsupported
.arborizeTree:
; directory bitmap
.ntfsNodeAlloc:
; in: [ebp+NTFS.attr_offs] -> $IndexAllocation
; out:
; [ebp+NTFS.newRecord] = node VCN
; [ebp+NTFS.cur_offs]
; CF=1 -> eax = error code
mov esi, [ebp+NTFS.attr_offs]
add esi, [esi+sizeWithHeader]
cmp byte [esi], 0xB0
jnz .errorPop3
jnz .ret
movzx eax, byte [esi+attributeOffset]
add esi, eax
mov eax, [esi]
not eax
bsf eax, eax
jz .errorPop3
jz .ret
bts [esi], eax
mul [ebp+NTFS.cur_subnode_size]
mov [ebp+NTFS.newRecord], eax
; find median index
mov ecx, [ebp+NTFS.cur_size]
cmp ecx, [ebp+NTFS.cur_subnode_size]
jz @f
mul [ebp+NTFS.sectors_per_cluster]
@@:
mov [ebp+NTFS.cur_offs], eax
add eax, ecx
shl eax, 9
mov esi, [ebp+NTFS.attr_offs]
cmp [esi+attributeAllocatedSize], eax
jnc @f
xor edx, edx
jmp resizeAttribute
.ret:
movi eax, ERROR_UNSUPPORTED_FS
stc
@@:
ret
.arborizeTree: ; find median index
mov ecx, [edi+nodeRealSize]
sub ecx, [edi+indexOffset]
shr ecx, 1
@ -2180,18 +2219,24 @@ ntfs_CreateFile:
mov ax, [edi+indexAllocatedSize]
sub ecx, eax
jnc @b
add eax, 8
mov esi, [ebp+NTFS.secondIndexBuffer]
cmp dword [esi], 'INDX'
jz .errorPop3 ; move index to the branch node
; move index to the root node
mov esi, [ebp+NTFS.frs_buffer]
mov ecx, [esi+recordRealSize]
add eax, 8
add ecx, eax
mov ecx, eax
add ecx, 8
add ecx, [esi+recordRealSize]
cmp [esi+recordAllocatedSize], ecx
jc .errorPop3 ; tree grow required
sub ecx, 8
mov [esi+recordRealSize], ecx
add esi, ecx
push edi eax esi
call .ntfsNodeAlloc
pop esi eax edi
jc ntfsErrorPop3
push edi
mov edi, [ebp+NTFS.indexRoot]
add [ebp+NTFS.attr_offs], eax
@ -2255,45 +2300,14 @@ ntfs_CreateFile:
mov byte [esi+indexFlags], 2
mov esi, [ebp+NTFS.cur_index_buf]
mov eax, [ebp+NTFS.newRecord]
movzx edx, word [esi+updateSequenceSize]
dec edx
mov [esi+recordVCN], eax
add esi, recordNode
sub edi, esi
mov [esi+nodeRealSize], edi
; allocate new node
add eax, [ebp+NTFS.cur_subnode_size]
cmp edx, [ebp+NTFS.cur_subnode_size]
jz @f
mul [ebp+NTFS.sectors_per_cluster]
@@:
shl eax, 9
mov esi, [ebp+NTFS.attr_offs]
cmp [esi+attributeAllocatedSize], eax
jnc .errorPop3
call resizeAttribute
jc ntfsErrorPop3
mov eax, [ebp+NTFS.secondIndexBuffer]
mov [ebp+NTFS.cur_buf], eax
call writeRecord
mov eax, [ebp+NTFS.fileDataStart]
mul [ebp+NTFS.sectors_per_cluster]
mov [ebp+NTFS.LastRead], eax
mov eax, [ebp+NTFS.cur_index_buf]
mov [ebp+NTFS.cur_buf], eax
call writeRecord
mov eax, [ebp+NTFS.rootLastRead]
mov [ebp+NTFS.LastRead], eax
mov eax, [ebp+NTFS.frs_buffer]
mov [ebp+NTFS.cur_buf], eax
call writeRecord
mov esi, [esp+4]
stdcall ntfs_find_lfn.doit2, 0
test eax, eax
jz .errorPop3
mov edi, [ebp+NTFS.cur_index_buf]
mov edx, [esp]
jmp .indexRecord
jmp .refresh
.common:
add edi, edx