Difference between revisions of "Unit VirtualDisk"

Latest revision as of 04:40, 29 October 2021

`vmwareFileExtension = '.vmdk';`

`vmwareFileMask = '*.vmdk';`

`vmwareNoParentCID = $FFFFFFFF;`	not($00000000)

`vmwareSparseMagicNumber = $564d444b;`	'VMDK'

`vmwareEsxSparseMagicNumber = $44574f43;`	'COWD'
`vmwareEsxSparseMaxParentLength = 1024;`	COWDISK_MAX_PARENT_FILELEN
`vmwareEsxSparseMaxNameLength = 60;`	COWDISK_MAX_NAME_LEN
`vmwareEsxSparseMaxDescriptionLength = 512;`	COWDISK_MAX_DESC_LEN

`vmwareSectorSize = 512;`

VMware disk type vmware*DiskType

`vmwareMaxDiskType = 0;`
`vmwareDiskTypeNone = 0;`

VMware descriptor tag vmwareTag*

`vmwareTagDisk = 'Disk DescriptorFile';`
`vmwareTagVersion = 'version';`
`vmwareTagCID = 'CID';`
`vmwareTagParentCID = 'parentCID';`
`vmwareTagCreateType = 'createType';`
`vmwareTagExtent = 'Extent Description';`
`vmwareTagDatabase = 'The Disk Data Base';`
`vmwareTagDDB = 'DDB';`
`vmwareTagAdapter = 'ddb.adapterType';`
`vmwareTagSectors = 'ddb.geometry.sectors';`
`vmwareTagHeads = 'ddb.geometry.heads';`
`vmwareTagCylinders = 'ddb.geometry.cylinders';`
`vmwareTagParentHint = 'parentFileNameHint';`

VMware create type vmwareCreateType_*

`vmwareMaxCreateType = 11;`
`vmwareCreateType_monolithicSparse = 0;`
`vmwareCreateType_vmfsSparse = 1;`
`vmwareCreateType_monolithicFlat = 2;`
`vmwareCreateType_vmfs = 3;`
`vmwareCreateType_twoGbMaxExtentSparse = 4;`
`vmwareCreateType_twoGbMaxExtentFlat = 5;`
`vmwareCreateType_fullDevice = 6;`
`vmwareCreateType_vmfsRaw = 7;`
`vmwareCreateType_partitionedDevice = 8;`
`vmwareCreateType_vmfsRawDeviceMap = 9;`
`vmwareCreateType_vmfsPassthroughRawDeviceMap = 10;`
`vmwareCreateType_streamOptimized = 11;`

VMware access type vmwareAccessType_*

`vmwareMaxAccessType = 2;`
`vmwareAccessType_RW = 0;`
`vmwareAccessType_RDONLY = 1;`
`vmwareAccessType_NOACCESS = 2;`

VMware extent type vmwareExtentType_*

`vmwareMaxExtentType = 6;`
`vmwareExtentType_FLAT = 0;`
`vmwareExtentType_SPARSE = 1;`
`vmwareExtentType_ZERO = 2;`
`vmwareExtentType_VMFS = 3;`
`vmwareExtentType_VMFSSPARSE = 4;`
`vmwareExtentType_VMFSRDM = 5;`
`vmwareExtentType_VMFSRAW = 6;`

VMware disk flag vmwareFlag*

`vmwareFlagValidTest = $00000001;`	bit 0: valid new line detection test
`vmwareFlagRedundantGrain = $00000002;`	bit 1: redundant grain table will be used
`vmwareFlagGrainCompressed = $00010000;`	bit 16: the grains are compressed. The type of compression is described by compressAlgorithm
`vmwareFlagLBAMarkers = $00020000;`	bit 17: there are markers in the virtual disk to identify every block of metadata or data and the markers for the virtual machine data contain a LBA

VMware compression type vmwareCompression*

`vmwareCompressionNone = 0;`
`vmwareCompressionDeflate = 1;`	The deflate algorithm is described in RFC 1951

VPC constants vpc*

`vpcFileExtension = '.vhd';`
`vpcUndoExtension = '.vud';`

`vpcFileMask = '*.vhd';`
`vpcUndoMask = '*.vud';`
`vpcSplitMask = '*.v??';`	.v01, v02 etc up to 64

`vpcFooterCookie = 'conectix';`
`vpcDynamicCookie = 'cxsparse';`

`vpcMaxDiskExtents = 64;`	Maximum number of 4GB split files in a disk image
`vpcExtentMaxSize = 4294967296;`	Maximum size of s split file (4GB)

`vpcUnixTimeOffset = 946684800;`	Offset from 1/1/1970 to 1/1/2000

`vpcFooterVersion = $00010000;`
`vpcDynamicVersion = $00010000;`

`vpcSectorSize = 512;`

`vpcUnallocatedBlock = $FFFFFFFF;`
`vpcFixedDiskTableOffset = $FFFFFFFFFFFFFFFF;`
`vpcDynamicDiskDataOffset = $FFFFFFFFFFFFFFFF;`

`vpcMaxBlockGroup = $FF;`
`vpcBlockGroupMask = $FF;`
`vpcBlockGroupOffset = $100;`

VPC disk type vpcDiskType*

`vpcMaxDiskType = 6;`
`vpcDiskTypeNone = 0;`
`vpcDiskTypeReserved1 = 1;`
`vpcDiskTypeFixed = 2;`
`vpcDiskTypeDynamic = 3;`
`vpcDiskTypeDifferencing = 4;`
`vpcDiskTypeReserved2 = 5;`
`vpcDiskTypeReserved3 = 6;`

VPC feature vpcFeature*

`vpcFeatureNone = $00000000;`
`vpcFeatureTemporary = $00000001;`
`vpcFeatureReserved = $00000002;`	This bit must always be set to 1

VPC creator host OS vpcCreator*

`vpcCreatorWindows = $5769326B;`	Wi2k
`vpcCreatorMacintosh = $4D616320;`	Mac

VPC platform code vpcPlatform*

`vpcPlatformNone = $00000000;`
`vpcPlatformWi2r = $57693272;`	Wi2r deprecated
`vpcPlatformWi2k = $5769326B;`	Wi2k deprecated
`vpcPlatformW2ru = $57327275;`	W2ru Unicode pathname (UTF-16) on Windows relative to the differencing disk pathname
`vpcPlatformW2ku = $57326B75;`	W2ku Absolute Unicode (UTF-16) pathname on Windows
`vpcPlatformMac = $4D616320;`	Mac OS alias stored as a blob
`vpcPlatformMacX = $4D616358;`	MacX A file URL with UTF-8 encoding conforming to RFC 2396

VPC bitmap mask vpcBitmapMask*

`vpcBitmapMaskBits = 32;`	LongWord Bitmap Masks
`vpcBitmapMaskNone = $00000000;`	LongWord (Used for fast counting of free blocks)
`vpcBitmapMaskAll = $FFFFFFFF;`	LongWord (Used for fast counting of used blocks)

`vpcBitmapMasks:array[0..31] of LongWord = (`
`$00000001,$00000002,$00000004,$00000008,$00000010,$00000020,$00000040,$00000080,`
`$00000100,$00000200,$00000400,$00000800,$00001000,$00002000,$00004000,$00008000,`
`$00010000,$00020000,$00040000,$00080000,$00100000,$00200000,$00400000,$00800000,`
`$01000000,$02000000,$04000000,$08000000,$10000000,$20000000,$40000000,$80000000);`

`vpcBitmapMasks:array[0..31] of LongWord = (`	Ordered to allow for big endian bitmap
`$00000080,$00000040,$00000020,$00000010,$00000008,$00000004,$00000002,$00000001,`
`$00008000,$00004000,$00002000,$00001000,$00000800,$00000400,$00000200,$00000100,`
`$00800000,$00400000,$00200000,$00100000,$00080000,$00040000,$00020000,$00010000,`
`$80000000,$40000000,$20000000,$10000000,$08000000,$04000000,$02000000,$01000000);`

VirtualBox constants vbox*

`vboxFileExtension = '.vdi';`

`vboxDiskBanner = '<<< Sun xVM VirtualBox Disk Image >>>';`	Plus a LF character in some images (#10)
`vboxDiskVersion = $00010001;`
`vboxDiskSignature = $BEDA107F;`

`vboxFileMask = '*.vdi';`
`vboxPathMask = '.';`
`vboxDeltaPath = '..\Machines\';`
`vboxParentPath = '..\..\..\VDI\';`
`vboxNewParentPath = '..\..\..\HardDisks\';`
`vboxSnapshotPath = '\Snapshots\';`

`vboxUnallocatedBlock = $FFFFFFFF;`

VirtualBox disk type vboxDiskType*

`vboxMaxDiskType = 4;`
`vboxDiskTypeNone = 0;`
`vboxDiskTypeDynamic = 1;`
`vboxDiskTypeStatic = 2;`
`vboxDiskTypeUnknown = 3;`
`vboxDiskTypeDifferencing = 4;`

VirtualBox disk flag vboxDiskFlags*

`vboxDiskFlagsNone = $00000000;`

Type definitions

ESX sparse extent header

PEsxSparseExtentHeader = ^TEsxSparseExtentHeader;

TEsxSparseExtentHeader = packed record

Note: Always 2048 bytes (Only used for Delta disks, not Dynamic)
`magicNumber:LongWord;`	0x44574f43/'COWD'
`version:LongWord;`	The value of this entry should be 1
`flags:LongWord;`	set to 3
`numSectors:LongWord;`	total number of sectors on the base disk
`grainSize:LongWord;`	one sector by default. Can vary from one sector to 1MB
`gdOffset:LongWord;`	starts at the fourth sector, because the COWDisk_Header structure takes four sectors
`numGDEntries:LongWord;`	is CEILING(numSectors, gtCoverage)
`freeSector:LongWord;`	the next free data sector. This needs to be less than the length of the delta link. It is initially set to gdOffset + numGDSectors
`case Integer of`
`0: (cylinders:LongWord;`	root
`heads:LongWord;`
`sectors:LongWord;`
`generation:LongWord;`	cont
`name:array[0..vmwareEsxSparseMaxNameLength - 1] of Char;`
`description:array[0..vmwareEsxSparseMaxDescriptionLength - 1] of Char;`
`savedGeneration:LongWord;`	used to detect the unclean shutdown of the delta link. It is initially set to 0
`reserved:array[0..7] of Char;`
`uncleanShutdown:LongWord;`	used to trigger the metadata consistency check in case there is an abnormal termination of the program
`padding:array[0..395] of Char);`
`1: (parentFileName:array[0..vmwareEsxSparseMaxParentLength - 1] of Char;`	child
`parentGeneration:LongWord;`
`generationx:LongWord;`	cont
`namex:array[0..vmwareEsxSparseMaxNameLength - 1] of Char;`
`descriptionx:array[0..vmwareEsxSparseMaxDescriptionLength - 1] of Char;`
`savedGenerationx:LongWord;`	used to detect the unclean shutdown of the delta link. It is initially set to 0
`reservedx:array[0..7] of Char;`
`uncleanShutdownx:LongWord;`	used to trigger the metadata consistency check in case there is an abnormal termination of the program
`paddingx:array[0..395] of Char);`	remaining fields are not used. They are present to maintain compatibility with legacy virtual disk formats

VMware sparse extent header

PVmwareSparseExtentHeader = ^TVmwareSparseExtentHeader;

TVmwareSparseExtentHeader = packed record

Note: Always 512 bytes (Used for both Dynamic and Delta disks)
`magicNumber:LongWord;`	0x564d444b/'VMDK'
`version:LongWord;`	The value of this entry should be 1
`flags:LongWord;`	See above
`capacity:Int64;`	the capacity of this extent in sectors (should be a multiple of the grain size)
`grainSize:Int64;`	size of a grain in sectors (must be a power of 2 and must be greater than 8 (4KB))
`descriptorOffset:Int64;`	offset of the embedded descriptor in the extent (expressed in sectors)
`descriptorSize:Int64;`	valid only if descriptorOffset is non-zero (expressed in sectors)
`numGTEsPerGT:LongWord;`	the number of entries in a grain table (for VMware virtual disks is 512)
`rgdOffset:Int64;`	redundant level 0 of metadata (expressed in sectors)
`gdOffset:Int64;`	level 0 of metadata (expressed in sectors)
`overHead:Int64;`	number of sectors occupied by the metadata
`uncleanShutdown:ByteBool;`	set to FALSE when VMware software closes an extent. Four entries are used to detect when an extent file has been corrupted by transferring it using FTP in text mode. The entries should be initialized with the following values
`singleEndLineChar:Char;`	'\n'
`nonEndLineChar:Char;`	' '
`doubleEndLineChar1:Char;`	'\r'
`doubleEndLineChar2:Char;`	'\n'
`compressAlgorithm:Word;`	See above
`pad:array[0..432] of Byte;`

VPC dish geometry

PVpcDiskGeometry = ^TVpcDiskGeometry;

TVpcDiskGeometry = packed record

Note: Always 4 bytes
`Cylinders:Word;`	Cylinders
`Heads:Byte;`	Heads
`Sectors:Byte;`	Sectors per track

VPC parent locator

PVpcParentLocator = ^TVpcParentLocator;

TVpcParentLocator = packed record

Note: Always 24 bytes
`PlatformCode:LongWord;`	describes which platform-specific format is used for the file locator (see above)
`PlatformDataSpace:LongWord;`	the number of 512-byte sectors needed to store the parent hard disk locator
`PlatformDataLength:LongWord;`	length of the parent hard disk locator in bytes
`Reserved:LongWord;`	Reserved, must be zero
`PlatformDataOffset:Int64;`	offset in bytes where the platform specific file locator data is stored

VPC hard disk footer

PVpcHardDiskFooter = ^TVpcHardDiskFooter;

TVpcHardDiskFooter = packed record

Note: Always 512 bytes (At end of file on Fixed disks, at start and end on Dynamic and Differencing disks)
`Cookie:array[0..7] of Char;`	conectix
`Features:LongWord;`
`Version:LongWord;`	0x00010000
`DataOffset:Int64;`	Offset to Dynamic Disk Header, Must be 0xFFFFFFFF for Fixed Disks
`TimeStamp:LongWord;`	seconds since January 1, 2000 12:00:00 AM in UTC/GMT (Unix Time minus 30 years)
`CreatorApplication:array[0..3] of Char;`	Microsoft Virtual PC = "vpc "/Microsoft Virtual Server = "vs "
`CreatorVersion:LongWord;`	Virtual Server 2004 = 0x00010000/Virtual PC 2004 = 0x00050000
`CreatorHostOS:LongWord;`	Windows 0x5769326B (Wi2k)/Macintosh 0x4D616320 (Mac )
`OriginalSize:Int64;`	Size in Bytes of the VHD at Creation
`CurrentSize:Int64;`	Current Size in Bytes of the VHD
`DiskGeometry:TVpcDiskGeometry;`	See above
`DiskType:LongWord;`	See above
`Checksum:LongWord;`	1s compliment checksum of the footer
`UniqueId:TGUID;`
`SavedState:ByteBool;`	Set to 1 if disk is in a saved state
`Reserved:array[0..426] of Byte;`	Reserved, must be zero

VPC dynamic disk header

PVpcDynamicDiskHeader = ^TVpcDynamicDiskHeader;

TVpcDynamicDiskHeader = packed record

Note: Always 1024 bytes (Used for both Dynamic and Differencing disks)
`Cookie:array[0..7] of Char;`	cxsparse
`DataOffset:Int64;`	currently unused by existing formats and should be set to 0xFFFFFFFF
`TableOffset:Int64;`	absolute byte offset of the Block Allocation Table (BAT)
`HeaderVersion:LongWord;`	must be initialized to 0x00010000
`MaxTableEntries:LongWord;`	maximum entries present in the BAT. equal to the number of blocks in the disk (disk size divided by the blocksize)
`BlockSize:LongWord;`	The default value is 0x00200000 (indicating a block size of 2 MB)
`Checksum:LongWord;`	1s compliment checksum of the header
`ParentUniqueId:TGUID;`	only used for differencing hard disks
`ParentTimeStamp:LongWord;`	number of seconds since January 1, 2000 12:00:00 AM in UTC/GMT
`Reserved1:LongWord;`	Must be zero
`ParentUnicodeName:array[0..255] of WideChar;`	parent hard disk filename (Unicode/UTF16 string)
`ParentLocator1:TVpcParentLocator;`	These entries store an absolute byte offset in the file where the parent locator for a differencing hard disk is stored
`ParentLocator2:TVpcParentLocator;`	These fields are used only for differencing disks and should be set to zero for dynamic disks
`ParentLocator3:TVpcParentLocator;`	These fields are used only for differencing disks and should be set to zero for dynamic disks
`ParentLocator4:TVpcParentLocator;`	These fields are used only for differencing disks and should be set to zero for dynamic disks
`ParentLocator5:TVpcParentLocator;`	These fields are used only for differencing disks and should be set to zero for dynamic disks
`ParentLocator6:TVpcParentLocator;`	These fields are used only for differencing disks and should be set to zero for dynamic disks
`ParentLocator7:TVpcParentLocator;`	These fields are used only for differencing disks and should be set to zero for dynamic disks
`ParentLocator8:TVpcParentLocator;`	These fields are used only for differencing disks and should be set to zero for dynamic disks
`Reserved2:array[0..255] of Byte;`	Reserved, must be zero

VirtualBox disk header

PVboxDiskHeader = ^TVboxDiskHeader;

TVboxDiskHeader = packed record

Note: Always 512 bytes (At start of file for both Fixed and Dynamic disks)
`Banner:array[0..63] of Char;`	<<< Sun xVM VirtualBox Disk Image >>>
`Signature:LongWord;`	7F 10 DA BE
`Version:LongWord;`	1.1
`HeaderSize:LongWord;`	0x190
`DiskType:LongWord;`	see above
`DiskFlags:LongWord;`	see above
`Description:array[0..255] of Char;`	Unused
`BlocksOffset:LongWord;`
`DataOffset:LongWord;`
`Cylinders:LongWord;`
`Heads:LongWord;`
`Sectors:LongWord;`
`SectorSize:LongWord;`
`Reserved1:LongWord;`	Must be zero
`DiskSize:Int64;`	Bytes
`BlockSize:LongWord;`
`BlockExtra:LongWord;`
`TotalBlocks:LongWord;`
`AllocatedBlocks:LongWord;`
`UUID:TGUID;`
`SnapshotUUID:TGUID;`
`LinkUUID:TGUID;`
`ParentUUID:TGUID;`
`Unknown1:LongWord;`
`Unknown2:LongWord;`
`Reserved2:LongWord;`	Must be 0x3F
`Reserved3:LongWord;`	Must be 0x200
`Unused:array[0..9] of LongWord;`

Class definitions

Virtual disk specific classes

`TVirtualDiskController = class(TDiskController)`

`TVirtualDiskDevice = class(TDiskDevice)`

`TVirtualDiskPartition = class(TDiskPartition)`

`TVirtualDiskImage = class(TDiskImage)`

`TVirtualDiskMemoryImage = class(TVirtualDiskImage)`

`TVirtualDiskFileImage = class(TVirtualDiskImage)`

`TVirtualDiskDeviceImage = class(TVirtualDiskImage)`

`TVirtualDiskIsoImage = class(TVirtualDiskImage)`

`TVirtualDiskBochsImage = class(TVirtualDiskImage)`

`TVirtualDiskVmwareImage = class(TVirtualDiskImage)`

`TVirtualDiskVpcImage = class(TVirtualDiskImage)`

`TVirtualDiskVboxImage = class(TVirtualDiskImage)`

`TVirtualRecognizer = class(TRecognizer)`

`TVirtualDiskResizer = class(TDiskResizer)`

`TVirtualDiskCopier = class(TDiskCopier)`

`TVirtualDiskImager = class(TDiskImager)`

`TVirtualDiskExtent = class(TListObject)`

`TVirtualDiskVmwareExtent = class(TVirtualDiskExtent)`

`TVirtualDiskVpcExtent = class(TVirtualDiskExtent)`

`TVirtualDiskVboxExtent = class(TVirtualDiskExtent)`

`TVirtualDiskTable = class(TListObject)`

`TVirtualDiskVmwareTable = class(TVirtualDiskTable)`

`TVirtualDiskVpcTable = class(TVirtualDiskTable)`

`TVirtualDiskVboxTable = class(TVirtualDiskTable)`

`TVirtualDiskBlock = class(TListObject)`

`TVirtualDiskVmwareBlock = class(TVirtualDiskBlock)`

`TVirtualDiskVpcGroup = class(TListObject)`

`TVirtualDiskVpcBlock = class(TVirtualDiskBlock)`

Public variables

None defined

Function declarations

Initialization functions

procedure VirtualInit;

Description: To be documented

Note	None documented

procedure VirtualQuit;

Description: To be documented

Note	None documented

Virtual disk helper functions

function VirtualDataToPointer(const AData; ASize:Integer; ASwap:Boolean):Pointer;

Description: Creates a pointer and copies data from a buffer

Note	Allows byte order swapping on copy

function VirtualPointerToData(APointer:Pointer; var AData; ASize:Integer; ASwap:Boolean):Boolean;

Description: Copies data to a buffer from supplied pointer

Note	Allows byte order swapping on copy

function VirtualDataToString(const AData; ASize:Integer; AUnicode:Boolean):String;

Description: Converts the supplied data to a string

Note	Accounts for unicode and byte ordering

function VirtualStringToData(const AString:String; var AData; ASize:Integer ;AUnicode:Boolean):Boolean;

Description: Converts the supplied string to data

Note	Accounts for unicode and byte ordering

Return to Unit Reference

@@ Line 54: / Line 54: @@
 </div></div>
 <br />
+<div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
+<div style="font-size: 14px; padding-left: 12px;">'''Initramfs constants''' <code> memoryInitramfs* </code></div>
+<div class="mw-collapsible-content" style="text-align: left; padding-left: 5px;">
+{| class="wikitable" style="font-size: 14px; background: white;"
+|-
+| <code>memoryInitramfsName = 'INITRAMFS';</code>
+| style="width: 50%;"|&nbsp;
+|-
+|}
+</div></div>
+<br />
 <div class="toccolours mw-collapsible mw-collapsed" style="border: 1; font-family: arial; padding-top: 20px; padding-bottom: 15px;">
 <div style="font-size: 14px; padding-left: 12px;">'''VMware constants''' <code> vmware* </code></div>

`virtualFlagNone = $00000000;`
`virtualFlagFixed = $00000001;`
`virtualFlagDynamic = $00000002;`
`virtualFlagBase = $00000004;`
`virtualFlagDelta = $00000008;`
`virtualFlagDevice = $00000010;`
`virtualFlagSplit = $00000020;`

Difference between revisions of "Unit VirtualDisk"

Latest revision as of 04:40, 29 October 2021

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`VIRTUAL_DEVICE_DESCRIPTION = 'Virtual Disk Device';`
`VIRTUAL_CONTROLLER_DESCRIPTION = 'Virtual Disk Controller';`