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Rev 5363 Rev 5954
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;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
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;; Copyright (C) KolibriOS team 2004-2015. All rights reserved. ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;; Distributed under terms of the GNU General Public License    ;;
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;;                                                              ;;
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;;                                                              ;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
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$Revision: 5954 $
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; NTFS driver
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; Basic concepts:
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; File is a FileRecord in the $MFT.
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; $MFT is a file, that consists of FileRecords and starts with FileRecord of itself.
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; FileRecord (FILE) consists of a header and attributes.
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; Attribute consists of a header and a body.
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; Attribute's body can be inside (resident) or outside of FileRecord.
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; File's data is a body of $Data (80h) attribute.
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; FileRecords is a data of the $MFT file.
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; Directory is a file, that consists of index nodes.
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; Resident index node is always located in a body of $IndexRoot (90h) attribute.
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; Body of $IndexAllocation (A0h) attribute is always non resident
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;  and consists of IndexRecords.
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; IndexRecord (INDX) consists of a header and an index node.
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; Index node consists of a header and indexes.
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; Index consists of a header and a copy of indexed attribute's body.
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; Directories index $Filename (30h) attribute of all existing files.
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; $IndexRoot and $IndexAllocation attributes of a directory has a name — $I30.
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; Offsets:
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    ; record header
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updateSequenceOffset = 4
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updateSequenceSize = 6
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reuseCounter = 16
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hardLinkCounter = 12h
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attributeOffset = 14h
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recordFlags = 16h
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recordRealSize = 18h
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recordAllocatedSize = 1ch
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newAttributeID = 28h
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    ; attribute header
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attributeType = 0
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sizeWithHeader = 4
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nonResidentFlag = 8
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nameLength = 9
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nameOffset = 10
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attributeID = 14
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sizeWithoutHeader = 16
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attributeFlags = 16h
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    ; non resident attribute header
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lastVCN = 18h
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dataRunsOffset = 20h
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attributeAllocatedSize = 28h
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attributeRealSize = 30h
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initialDataSize = 38h
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    ; $IndexRoot
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collationRule = 4
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indexRecordSize = 8
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indexRecordSizeClus = 12
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    ; node header
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indexOffset = 0
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nodeRealSize = 4
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nodeAllocatedSize = 8
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    ; $Filename index
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fileRecordReference = 0
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fileReferenceReuse = 6
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indexAllocatedSize = 8
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indexRawSize = 10
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indexFlags = 12
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directoryRecordReference = 16
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directoryReferenceReuse = 16h
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fileAllocatedSize = 38h
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fileRealSize = 40h
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fileFlags = 48h
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$Revision: 5363 $
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fileNameLength = 50h
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 76 
 
10 
struct NTFS PARTITION
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Lock                    MUTEX ?    ; currently operations with one partition
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struct NTFS PARTITION
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                                   ; can not be executed in parallel since the
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                                   ; legacy code is not ready; this mutex guards
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Lock                MUTEX   ?   ; Currently operations with one partition
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                                   ; all operations
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; can not be executed in parallel since the legacy code is not ready.
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sectors_per_cluster     dd      ?
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sectors_per_cluster     dd  ?
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mft_cluster             dd      ?
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mft_cluster             dd  ?   ; location
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mftmirr_cluster         dd      ?
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frs_size                dd      ?       ; FRS size in bytes
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mftmirr_cluster         dd  ?   ; location
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iab_size                dd      ?       ; IndexAllocationBuffer size in bytes
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frs_buffer              dd      ?
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frs_size                dd  ?   ; in bytes
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iab_buffer              dd      ?
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frs_buffer              dd  ?   ; MFT fileRecord buffer
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mft_retrieval           dd      ?
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mft_retrieval           dd  ?
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mft_retrieval_size      dd      ?
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mft_retrieval_size      dd  ?
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mft_retrieval_alloc     dd      ?
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mft_retrieval_alloc     dd  ?
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mft_retrieval_end       dd      ?
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mft_retrieval_end       dd  ?
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cur_index_size          dd  ?   ; in sectors
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cur_index_buf           dd  ?   ; index node buffer
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BitmapBuffer            dd  ?
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BitmapTotalSize         dd  ?   ; bytes reserved
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BitmapSize              dd  ?   ; bytes readen
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BitmapLocation          dd  ?   ; starting sector
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BitmapStart             dd  ?   ; first byte after area, reserved for MFT
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mftBitmapBuffer         dd  ?   ; one cluster
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cur_index_size          dd      ?
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mftBitmapSize           dd  ?   ; bytes readen
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cur_index_buf           dd      ?
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mftBitmapLocation       dd  ?   ; starting sector
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ntfs_cur_attr   dd      ?
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ntfs_cur_attr           dd  ?   ; attribute type
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ntfs_cur_iRecord dd     ?
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ntfs_cur_iRecord        dd  ?   ; number of fileRecord in MFT
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ntfs_cur_offs   dd      ?       ; in sectors
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ntfs_cur_offs           dd  ?   ; attribute VCN in sectors
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ntfs_cur_size   dd      ?       ; in sectors
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ntfs_cur_size           dd  ?   ; max sectors to read
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ntfs_cur_buf            dd  ?
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ntfs_cur_read           dd  ?   ; bytes readen
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ntfsLastRead            dd  ?   ; last readen block of sectors
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newMftRecord            dd  ?   ; number of fileRecord in MFT
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fileDataStart           dd  ?   ; starting cluster
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fileDataSize            dd  ?   ; in clusters
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fileRealSize            dd  ?   ; in bytes
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ntfs_cur_buf    dd      ?
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indexOffset             dd  ?
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nodeLastRead            dd  ?
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ntfs_cur_read   dd      ?       ; [output]
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ntfs_bCanContinue       db  ?
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ntfsNotFound            db  ?
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ntfs_bCanContinue db    ?
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ntfsFolder              db  ?
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                rb      3
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ntfsFragmentCount       db  ?
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cur_subnode_size        dd      ?
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cur_subnode_size        dd  ?
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ntfs_attrlist_buf       rb      0x400
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ntfs_attrlist_buf       rb  0x400
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ntfs_attrlist_mft_buf   rb      0x400
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ntfs_attrlist_mft_buf   rb  0x400
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ntfs_bitmap_buf         rb      0x400
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ntfs_bitmap_buf         rb  0x400
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ends
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ends
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; NTFS external functions
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;   in:
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; ebx -> parameter structure of sysfunc 70
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; ebp -> NTFS structure
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; [esi]+[esp+4] = name
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;   out:
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 137 
; eax, ebx = return values for sysfunc 70
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iglobal
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iglobal
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align 4
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align 4
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ntfs_user_functions:
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ntfs_user_functions:
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        dd      ntfs_free
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        dd      ntfs_free
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        dd      (ntfs_user_functions_end - ntfs_user_functions - 4) / 4
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        dd      (ntfs_user_functions_end - ntfs_user_functions - 4) / 4
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        dd      ntfs_Read
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        dd      ntfs_ReadFile
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        dd      ntfs_ReadFolder
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        dd      ntfs_ReadFolder
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        dd      ntfs_Rewrite
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        dd      ntfs_CreateFile
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        dd      ntfs_Write
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        dd      ntfs_Write
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        dd      ntfs_SetFileEnd
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        dd      ntfs_SetFileEnd
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        dd      ntfs_GetFileInfo
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        dd      ntfs_GetFileInfo
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        dd      ntfs_SetFileInfo
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        dd      ntfs_SetFileInfo
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ntfs_user_functions_end:
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ntfs_user_functions_end:
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endg
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endg
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ntfs_test_bootsec:
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ntfs_test_bootsec:
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; in: ebx->buffer, edx=size of partition
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; in: ebx -> buffer, edx = size of partition
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; out: CF set <=> invalid
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; out: CF=1 -> invalid
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; 1. Name=='NTFS    '
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; 1. Name=='NTFS    '
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        cmp     dword [ebx+3], 'NTFS'
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        cmp     dword [ebx+3], 'NTFS'
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        jnz     .no
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        jnz     .no
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        cmp     dword [ebx+7], '    '
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        cmp     dword [ebx+7], '    '
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        test    edx, edx
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        test    edx, edx
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        pop     edx
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        pop     edx
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        jnz     .no
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        jnz     .no
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        cmp     eax, edx
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        cmp     eax, edx
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        ja      .no
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        ja      .no
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; 7. Clusters per FRS must be either negative and in [-31,-9] or positive and power of 2
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; 7. Clusters per FRS must be either power of 2 or between -31 and -9
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        movsx   eax, byte [ebx+0x40]
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        movsx   eax, byte [ebx+0x40]
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        cmp     al, -31
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        cmp     al, -31
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        jl      .no
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        jl      .no
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        cmp     al, -9
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        cmp     al, -9
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        jle     @f
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        jle     @f
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        dec     eax
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        dec     eax
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        js      .no
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        js      .no
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        test    [ebx+0x40], al
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        test    [ebx+0x40], al
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        jnz     .no
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        jnz     .no
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@@:
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; 8. Same for clusters per IndexAllocationBuffer
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@@:         ; 8. Same for clusters per IndexAllocationBuffer
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        movsx   eax, byte [ebx+0x44]
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        movsx   eax, byte [ebx+0x44]
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        cmp     al, -31
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        cmp     al, -31
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        jl      .no
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        jl      .no
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        cmp     al, -9
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        cmp     al, -9
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        jle     @f
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        jle     @f
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        dec     eax
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        dec     eax
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        js      .no
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        js      .no
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        test    [ebx+0x44], al
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        test    [ebx+0x44], al
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        jnz     .no
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        jnz     .no
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@@:
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; OK, this is correct NTFS bootsector
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@@:         ; OK, this is correct NTFS bootsector
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        clc
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        clc
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        ret
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        ret
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.no:
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; No, this bootsector isn't NTFS
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.no:        ; No, this bootsector isn't NTFS
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        stc
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        stc
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        ret
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        ret
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proc ntfs_create_partition
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ntfs_create_partition:
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        cmp     dword [esi+DISK.MediaInfo.SectorSize], 512
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        cmp     dword [esi+DISK.MediaInfo.SectorSize], 512
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        jnz     .nope
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        jnz     .nope
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        mov     edx, dword [ebp+PARTITION.Length]
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        mov     edx, dword [ebp+PARTITION.Length]
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        cmp     dword [esp+4], 0
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        cmp     dword [esp+4], 0
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@@:
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@@:
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        mov     eax, edx
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        mov     eax, edx
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        shr     eax, 1
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        shr     eax, 1
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        call    fs_read32_sys
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        call    fs_read32_sys
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        test    eax, eax
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        test    eax, eax
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        jnz     .nope                   ; no chance...
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        jnz     .nope
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.boot_read_ok:
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.boot_read_ok:
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        call    ntfs_test_bootsec
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        call    ntfs_test_bootsec
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        jnc     .ntfs_setup
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        jnc     .ntfs_setup
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.nope:
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.nope:
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        xor     eax, eax
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        xor     eax, eax
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