VHDX.cpp@ 103523

Last change on this file since 103523 was 103523, checked in by vboxsync, 8 months ago
Storage/VHDX.cpp: Some unused variable fixes, bugref:3409
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[41315]	1	/* $Id: VHDX.cpp 103523 2024-02-22 11:15:48Z vboxsync $ */
	2	/** @file
	3	* VHDX - VHDX Disk image, Core Code.
	4	*/
	5
	6	/*
[98103]	7	* Copyright (C) 2012-2023 Oracle and/or its affiliates.
[41315]	8	*
[96407]	9	* This file is part of VirtualBox base platform packages, as
	10	* available from https://www.virtualbox.org.
	11	*
	12	* This program is free software; you can redistribute it and/or
	13	* modify it under the terms of the GNU General Public License
	14	* as published by the Free Software Foundation, in version 3 of the
	15	* License.
	16	*
	17	* This program is distributed in the hope that it will be useful, but
	18	* WITHOUT ANY WARRANTY; without even the implied warranty of
	19	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	20	* General Public License for more details.
	21	*
	22	* You should have received a copy of the GNU General Public License
	23	* along with this program; if not, see <https://www.gnu.org/licenses>.
	24	*
	25	* SPDX-License-Identifier: GPL-3.0-only
[41315]	26	*/
	27
[57358]	28
	29	/*********************************************************************************************************************************
	30	* Header Files *
	31	*********************************************************************************************************************************/
[50531]	32	#define LOG_GROUP LOG_GROUP_VD_VHDX
[41315]	33	#include <VBox/vd-plugin.h>
	34	#include <VBox/err.h>
	35
	36	#include <VBox/log.h>
[41353]	37	#include <iprt/asm.h>
[41315]	38	#include <iprt/assert.h>
	39	#include <iprt/alloc.h>
	40	#include <iprt/path.h>
	41	#include <iprt/uuid.h>
	42	#include <iprt/crc.h>
	43
[50988]	44	#include "VDBackends.h"
[66494]	45	#include "VDBackendsInline.h"
[50988]	46
[41315]	47
[57358]	48	/*********************************************************************************************************************************
	49	* On disk data structures *
	50	*********************************************************************************************************************************/
	51
[41315]	52	/**
	53	* VHDX file type identifier.
	54	*/
	55	#pragma pack(1)
	56	typedef struct VhdxFileIdentifier
	57	{
	58	/** Signature. */
	59	uint64_t u64Signature;
	60	/** Creator ID - UTF-16 string (not neccessarily null terminated). */
	61	uint16_t awszCreator[256];
	62	} VhdxFileIdentifier;
	63	#pragma pack()
	64	/** Pointer to an on disk VHDX file type identifier. */
	65	typedef VhdxFileIdentifier *PVhdxFileIdentifier;
	66
	67	/** VHDX file type identifier signature ("vhdxfile"). */
	68	#define VHDX_FILE_IDENTIFIER_SIGNATURE UINT64_C(0x656c696678646876)
	69	/** Start offset of the VHDX file type identifier. */
	70	#define VHDX_FILE_IDENTIFIER_OFFSET UINT64_C(0)
	71
	72	/**
	73	* VHDX header.
	74	*/
	75	#pragma pack(1)
	76	typedef struct VhdxHeader
	77	{
	78	/** Signature. */
	79	uint32_t u32Signature;
	80	/** Checksum. */
	81	uint32_t u32Checksum;
	82	/** Sequence number. */
	83	uint64_t u64SequenceNumber;
	84	/** File write UUID. */
	85	RTUUID UuidFileWrite;
	86	/** Data write UUID. */
	87	RTUUID UuidDataWrite;
	88	/** Log UUID. */
	89	RTUUID UuidLog;
	90	/** Version of the log format. */
	91	uint16_t u16LogVersion;
[64272]	92	/** VHDX format version. */
[41315]	93	uint16_t u16Version;
	94	/** Length of the log region. */
	95	uint32_t u32LogLength;
	96	/** Start offset of the log offset in the file. */
	97	uint64_t u64LogOffset;
	98	/** Reserved bytes. */
	99	uint8_t u8Reserved[4016];
	100	} VhdxHeader;
	101	#pragma pack()
	102	/** Pointer to an on disk VHDX header. */
	103	typedef VhdxHeader *PVhdxHeader;
	104
	105	/** VHDX header signature ("head"). */
	106	#define VHDX_HEADER_SIGNATURE UINT32_C(0x64616568)
	107	/** Start offset of the first VHDX header. */
	108	#define VHDX_HEADER1_OFFSET _64K
	109	/** Start offset of the second VHDX header. */
	110	#define VHDX_HEADER2_OFFSET _128K
	111	/** Current Log format version. */
	112	#define VHDX_HEADER_LOG_VERSION UINT16_C(0)
	113	/** Current VHDX format version. */
	114	#define VHDX_HEADER_VHDX_VERSION UINT16_C(1)
	115
	116	/**
	117	* VHDX region table header
	118	*/
	119	#pragma pack(1)
	120	typedef struct VhdxRegionTblHdr
	121	{
	122	/** Signature. */
	123	uint32_t u32Signature;
	124	/** Checksum. */
	125	uint32_t u32Checksum;
	126	/** Number of region table entries following this header. */
	127	uint32_t u32EntryCount;
	128	/** Reserved. */
	129	uint32_t u32Reserved;
	130	} VhdxRegionTblHdr;
	131	#pragma pack()
	132	/** Pointer to an on disk VHDX region table header. */
	133	typedef VhdxRegionTblHdr *PVhdxRegionTblHdr;
	134
	135	/** VHDX region table header signature. */
	136	#define VHDX_REGION_TBL_HDR_SIGNATURE UINT32_C(0x69676572)
	137	/** Maximum number of entries which can follow. */
	138	#define VHDX_REGION_TBL_HDR_ENTRY_COUNT_MAX UINT32_C(2047)
	139	/** Offset where the region table is stored (192 KB). */
	140	#define VHDX_REGION_TBL_HDR_OFFSET UINT64_C(196608)
	141	/** Maximum size of the region table. */
	142	#define VHDX_REGION_TBL_SIZE_MAX _64K
	143
	144	/**
	145	* VHDX region table entry.
	146	*/
	147	#pragma pack(1)
	148	typedef struct VhdxRegionTblEntry
	149	{
	150	/** Object UUID. */
	151	RTUUID UuidObject;
	152	/** File offset of the region. */
	153	uint64_t u64FileOffset;
	154	/** Length of the region in bytes. */
	155	uint32_t u32Length;
	156	/** Flags for this object. */
	157	uint32_t u32Flags;
	158	} VhdxRegionTblEntry;
	159	#pragma pack()
	160	/** Pointer to an on disk VHDX region table entry. */
	161	typedef struct VhdxRegionTblEntry *PVhdxRegionTblEntry;
	162
	163	/** Flag whether this region is required. */
	164	#define VHDX_REGION_TBL_ENTRY_FLAGS_IS_REQUIRED RT_BIT_32(0)
	165	/** UUID for the BAT region. */
	166	#define VHDX_REGION_TBL_ENTRY_UUID_BAT "2dc27766-f623-4200-9d64-115e9bfd4a08"
	167	/** UUID for the metadata region. */
	168	#define VHDX_REGION_TBL_ENTRY_UUID_METADATA "8b7ca206-4790-4b9a-b8fe-575f050f886e"
	169
	170	/**
	171	* VHDX Log entry header.
	172	*/
	173	#pragma pack(1)
	174	typedef struct VhdxLogEntryHdr
	175	{
	176	/** Signature. */
	177	uint32_t u32Signature;
	178	/** Checksum. */
	179	uint32_t u32Checksum;
	180	/** Total length of the entry in bytes. */
	181	uint32_t u32EntryLength;
	182	/** Tail of the log entries. */
	183	uint32_t u32Tail;
	184	/** Sequence number. */
	185	uint64_t u64SequenceNumber;
	186	/** Number of descriptors in this log entry. */
	187	uint32_t u32DescriptorCount;
	188	/** Reserved. */
	189	uint32_t u32Reserved;
	190	/** Log UUID. */
	191	RTUUID UuidLog;
	192	/** VHDX file size in bytes while the log entry was written. */
	193	uint64_t u64FlushedFileOffset;
	194	/** File size in bytes all allocated file structures fit into when the
	195	* log entry was written. */
	196	uint64_t u64LastFileOffset;
	197	} VhdxLogEntryHdr;
	198	#pragma pack()
	199	/** Pointer to an on disk VHDX log entry header. */
	200	typedef struct VhdxLogEntryHdr *PVhdxLogEntryHdr;
	201
	202	/** VHDX log entry signature ("loge"). */
	203	#define VHDX_LOG_ENTRY_HEADER_SIGNATURE UINT32_C(0x65676f6c)
	204
	205	/**
	206	* VHDX log zero descriptor.
	207	*/
	208	#pragma pack(1)
	209	typedef struct VhdxLogZeroDesc
	210	{
	211	/** Signature of this descriptor. */
	212	uint32_t u32ZeroSignature;
	213	/** Reserved. */
	214	uint32_t u32Reserved;
	215	/** Length of the section to zero. */
	216	uint64_t u64ZeroLength;
	217	/** File offset to write zeros to. */
	218	uint64_t u64FileOffset;
	219	/** Sequence number (must macht the field in the log entry header). */
	220	uint64_t u64SequenceNumber;
	221	} VhdxLogZeroDesc;
	222	#pragma pack()
	223	/** Pointer to an on disk VHDX log zero descriptor. */
	224	typedef struct VhdxLogZeroDesc *PVhdxLogZeroDesc;
	225
	226	/** Signature of a VHDX log zero descriptor ("zero"). */
	227	#define VHDX_LOG_ZERO_DESC_SIGNATURE UINT32_C(0x6f72657a)
	228
	229	/**
	230	* VHDX log data descriptor.
	231	*/
	232	#pragma pack(1)
	233	typedef struct VhdxLogDataDesc
	234	{
	235	/** Signature of this descriptor. */
	236	uint32_t u32DataSignature;
	237	/** Trailing 4 bytes removed from the update. */
	238	uint32_t u32TrailingBytes;
	239	/** Leading 8 bytes removed from the update. */
	240	uint64_t u64LeadingBytes;
	241	/** File offset to write zeros to. */
	242	uint64_t u64FileOffset;
	243	/** Sequence number (must macht the field in the log entry header). */
	244	uint64_t u64SequenceNumber;
	245	} VhdxLogDataDesc;
	246	#pragma pack()
	247	/** Pointer to an on disk VHDX log data descriptor. */
	248	typedef struct VhdxLogDataDesc *PVhdxLogDataDesc;
	249
	250	/** Signature of a VHDX log data descriptor ("desc"). */
	251	#define VHDX_LOG_DATA_DESC_SIGNATURE UINT32_C(0x63736564)
	252
	253	/**
	254	* VHDX log data sector.
	255	*/
	256	#pragma pack(1)
	257	typedef struct VhdxLogDataSector
	258	{
	259	/** Signature of the data sector. */
	260	uint32_t u32DataSignature;
	261	/** 4 most significant bytes of the sequence number. */
	262	uint32_t u32SequenceHigh;
	263	/** Raw data associated with the update. */
	264	uint8_t u8Data[4084];
	265	/** 4 least significant bytes of the sequence number. */
	266	uint32_t u32SequenceLow;
	267	} VhdxLogDataSector;
	268	#pragma pack()
	269	/** Pointer to an on disk VHDX log data sector. */
	270	typedef VhdxLogDataSector *PVhdxLogDataSector;
	271
	272	/** Signature of a VHDX log data sector ("data"). */
	273	#define VHDX_LOG_DATA_SECTOR_SIGNATURE UINT32_C(0x61746164)
	274
	275	/**
[41345]	276	* VHDX BAT entry.
	277	*/
	278	#pragma pack(1)
	279	typedef struct VhdxBatEntry
	280	{
	281	/** The BAT entry, contains state and offset. */
	282	uint64_t u64BatEntry;
	283	} VhdxBatEntry;
	284	#pragma pack()
	285	typedef VhdxBatEntry *PVhdxBatEntry;
	286
	287	/** Return the BAT state from a given entry. */
	288	#define VHDX_BAT_ENTRY_GET_STATE(bat) ((bat) & UINT64_C(0x7))
	289	/** Get the FileOffsetMB field from a given BAT entry. */
	290	#define VHDX_BAT_ENTRY_GET_FILE_OFFSET_MB(bat) (((bat) & UINT64_C(0xfffffffffff00000)) >> 20)
	291	/** Get a byte offset from the BAT entry. */
	292	#define VHDX_BAT_ENTRY_GET_FILE_OFFSET(bat) (VHDX_BAT_ENTRY_GET_FILE_OFFSET_MB(bat) * (uint64_t)_1M)
	293
	294	/** Block not present and the data is undefined. */
	295	#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_NOT_PRESENT (0)
	296	/** Data in this block is undefined. */
	297	#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_UNDEFINED (1)
	298	/** Data in this block contains zeros. */
	299	#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_ZERO (2)
	300	/** Block was unmapped by the application or system and data is either zero or
	301	* the data before the block was unmapped. */
	302	#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_UNMAPPED (3)
	303	/** Block data is in the file pointed to by the FileOffsetMB field. */
	304	#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_FULLY_PRESENT (6)
	305	/** Block is partially present, use sector bitmap to get present sectors. */
	306	#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_PARTIALLY_PRESENT (7)
	307
	308	/** The sector bitmap block is undefined and not allocated in the file. */
	309	#define VHDX_BAT_ENTRY_SB_BLOCK_NOT_PRESENT (0)
	310	/** The sector bitmap block is defined at the file location. */
	311	#define VHDX_BAT_ENTRY_SB_BLOCK_PRESENT (6)
	312
	313	/**
[41315]	314	* VHDX Metadata tabl header.
	315	*/
	316	#pragma pack(1)
	317	typedef struct VhdxMetadataTblHdr
	318	{
	319	/** Signature. */
	320	uint64_t u64Signature;
	321	/** Reserved. */
	322	uint16_t u16Reserved;
	323	/** Number of entries in the table. */
	324	uint16_t u16EntryCount;
	325	/** Reserved */
	326	uint32_t u32Reserved2[5];
	327	} VhdxMetadataTblHdr;
	328	#pragma pack()
	329	/** Pointer to an on disk metadata table header. */
	330	typedef VhdxMetadataTblHdr *PVhdxMetadataTblHdr;
	331
	332	/** Signature of a VHDX metadata table header ("metadata"). */
	333	#define VHDX_METADATA_TBL_HDR_SIGNATURE UINT64_C(0x617461646174656d)
	334	/** Maximum number of entries the metadata table can have. */
	335	#define VHDX_METADATA_TBL_HDR_ENTRY_COUNT_MAX UINT16_C(2047)
	336
	337	/**
	338	* VHDX Metadata table entry.
	339	*/
	340	#pragma pack(1)
	341	typedef struct VhdxMetadataTblEntry
	342	{
	343	/** Item UUID. */
	344	RTUUID UuidItem;
	345	/** Offset of the metadata item. */
	346	uint32_t u32Offset;
	347	/** Length of the metadata item. */
	348	uint32_t u32Length;
	349	/** Flags for the metadata item. */
	350	uint32_t u32Flags;
	351	/** Reserved. */
	352	uint32_t u32Reserved;
	353	} VhdxMetadataTblEntry;
	354	#pragma pack()
	355	/** Pointer to an on disk metadata table entry. */
	356	typedef VhdxMetadataTblEntry *PVhdxMetadataTblEntry;
	357
	358	/** FLag whether the metadata item is system or user metadata. */
	359	#define VHDX_METADATA_TBL_ENTRY_FLAGS_IS_USER RT_BIT_32(0)
	360	/** FLag whether the metadata item is file or virtual disk metadata. */
	361	#define VHDX_METADATA_TBL_ENTRY_FLAGS_IS_VDISK RT_BIT_32(1)
	362	/** FLag whether the backend must understand the metadata item to load the image. */
	363	#define VHDX_METADATA_TBL_ENTRY_FLAGS_IS_REQUIRED RT_BIT_32(2)
	364
	365	/** File parameters item UUID. */
	366	#define VHDX_METADATA_TBL_ENTRY_ITEM_FILE_PARAMS "caa16737-fa36-4d43-b3b6-33f0aa44e76b"
	367	/** Virtual disk size item UUID. */
[41345]	368	#define VHDX_METADATA_TBL_ENTRY_ITEM_VDISK_SIZE "2fa54224-cd1b-4876-b211-5dbed83bf4b8"
[41315]	369	/** Page 83 UUID. */
	370	#define VHDX_METADATA_TBL_ENTRY_ITEM_PAGE83_DATA "beca12ab-b2e6-4523-93ef-c309e000c746"
	371	/** Logical sector size UUID. */
	372	#define VHDX_METADATA_TBL_ENTRY_ITEM_LOG_SECT_SIZE "8141bf1d-a96f-4709-ba47-f233a8faab5f"
	373	/** Physical sector size UUID. */
	374	#define VHDX_METADATA_TBL_ENTRY_ITEM_PHYS_SECT_SIZE "cda348c7-445d-4471-9cc9-e9885251c556"
	375	/** Parent locator UUID. */
	376	#define VHDX_METADATA_TBL_ENTRY_ITEM_PARENT_LOCATOR "a8d35f2d-b30b-454d-abf7-d3d84834ab0c"
	377
	378	/**
	379	* VHDX File parameters metadata item.
	380	*/
	381	#pragma pack(1)
	382	typedef struct VhdxFileParameters
	383	{
	384	/** Block size. */
	385	uint32_t u32BlockSize;
	386	/** Flags. */
	387	uint32_t u32Flags;
	388	} VhdxFileParameters;
	389	#pragma pack()
	390	/** Pointer to an on disk VHDX file parameters metadata item. */
	391	typedef struct VhdxFileParameters *PVhdxFileParameters;
	392
	393	/** Flag whether to leave blocks allocated in the file or if it is possible to unmap them. */
	394	#define VHDX_FILE_PARAMETERS_FLAGS_LEAVE_BLOCKS_ALLOCATED RT_BIT_32(0)
	395	/** Flag whether this file has a parent VHDX file. */
	396	#define VHDX_FILE_PARAMETERS_FLAGS_HAS_PARENT RT_BIT_32(1)
	397
	398	/**
	399	* VHDX virtual disk size metadata item.
	400	*/
	401	#pragma pack(1)
	402	typedef struct VhdxVDiskSize
	403	{
	404	/** Virtual disk size. */
	405	uint64_t u64VDiskSize;
	406	} VhdxVDiskSize;
	407	#pragma pack()
	408	/** Pointer to an on disk VHDX virtual disk size metadata item. */
	409	typedef struct VhdxVDiskSize *PVhdxVDiskSize;
	410
	411	/**
	412	* VHDX page 83 data metadata item.
	413	*/
	414	#pragma pack(1)
	415	typedef struct VhdxPage83Data
	416	{
	417	/** UUID for the SCSI device. */
	418	RTUUID UuidPage83Data;
	419	} VhdxPage83Data;
	420	#pragma pack()
	421	/** Pointer to an on disk VHDX vpage 83 data metadata item. */
	422	typedef struct VhdxPage83Data *PVhdxPage83Data;
	423
	424	/**
	425	* VHDX virtual disk logical sector size.
	426	*/
	427	#pragma pack(1)
	428	typedef struct VhdxVDiskLogicalSectorSize
	429	{
	430	/** Logical sector size. */
[41345]	431	uint32_t u32LogicalSectorSize;
[41315]	432	} VhdxVDiskLogicalSectorSize;
	433	#pragma pack()
	434	/** Pointer to an on disk VHDX virtual disk logical sector size metadata item. */
	435	typedef struct VhdxVDiskLogicalSectorSize *PVhdxVDiskLogicalSectorSize;
	436
	437	/**
	438	* VHDX virtual disk physical sector size.
	439	*/
	440	#pragma pack(1)
	441	typedef struct VhdxVDiskPhysicalSectorSize
	442	{
	443	/** Physical sector size. */
	444	uint64_t u64PhysicalSectorSize;
	445	} VhdxVDiskPhysicalSectorSize;
	446	#pragma pack()
	447	/** Pointer to an on disk VHDX virtual disk physical sector size metadata item. */
	448	typedef struct VhdxVDiskPhysicalSectorSize *PVhdxVDiskPhysicalSectorSize;
	449
	450	/**
	451	* VHDX parent locator header.
	452	*/
	453	#pragma pack(1)
	454	typedef struct VhdxParentLocatorHeader
	455	{
	456	/** Locator type UUID. */
	457	RTUUID UuidLocatorType;
	458	/** Reserved. */
	459	uint16_t u16Reserved;
	460	/** Number of key value pairs. */
	461	uint16_t u16KeyValueCount;
	462	} VhdxParentLocatorHeader;
	463	#pragma pack()
	464	/** Pointer to an on disk VHDX parent locator header metadata item. */
	465	typedef struct VhdxParentLocatorHeader *PVhdxParentLocatorHeader;
	466
	467	/** VHDX parent locator type. */
	468	#define VHDX_PARENT_LOCATOR_TYPE_VHDX "b04aefb7-d19e-4a81-b789-25b8e9445913"
	469
	470	/**
	471	* VHDX parent locator entry.
	472	*/
	473	#pragma pack(1)
	474	typedef struct VhdxParentLocatorEntry
	475	{
	476	/** Offset of the key. */
	477	uint32_t u32KeyOffset;
	478	/** Offset of the value. */
	479	uint32_t u32ValueOffset;
	480	/** Length of the key. */
	481	uint16_t u16KeyLength;
	482	/** Length of the value. */
	483	uint16_t u16ValueLength;
	484	} VhdxParentLocatorEntry;
	485	#pragma pack()
	486	/** Pointer to an on disk VHDX parent locator entry. */
	487	typedef struct VhdxParentLocatorEntry *PVhdxParentLocatorEntry;
	488
	489
[57358]	490	/*********************************************************************************************************************************
	491	* Constants And Macros, Structures and Typedefs *
	492	*********************************************************************************************************************************/
	493
[41315]	494	typedef enum VHDXMETADATAITEM
	495	{
	496	VHDXMETADATAITEM_UNKNOWN = 0,
	497	VHDXMETADATAITEM_FILE_PARAMS,
	498	VHDXMETADATAITEM_VDISK_SIZE,
	499	VHDXMETADATAITEM_PAGE83_DATA,
	500	VHDXMETADATAITEM_LOGICAL_SECTOR_SIZE,
	501	VHDXMETADATAITEM_PHYSICAL_SECTOR_SIZE,
	502	VHDXMETADATAITEM_PARENT_LOCATOR,
	503	VHDXMETADATAITEM_32BIT_HACK = 0x7fffffff
	504	} VHDXMETADATAITEM;
	505
	506	/**
	507	* Table to validate the metadata item UUIDs and the flags.
	508	*/
	509	typedef struct VHDXMETADATAITEMPROPS
	510	{
	511	/** Item UUID. */
	512	const char *pszItemUuid;
	513	/** Flag whether this is a user or system metadata item. */
	514	bool fIsUser;
	515	/** Flag whether this is a virtual disk or file metadata item. */
	516	bool fIsVDisk;
	517	/** Flag whether this metadata item is required to load the file. */
	518	bool fIsRequired;
	519	/** Metadata item enum associated with this UUID. */
	520	VHDXMETADATAITEM enmMetadataItem;
	521	} VHDXMETADATAITEMPROPS;
	522
	523	/**
	524	* VHDX image data structure.
	525	*/
	526	typedef struct VHDXIMAGE
	527	{
	528	/** Image name. */
[48851]	529	const char *pszFilename;
[41315]	530	/** Storage handle. */
[48851]	531	PVDIOSTORAGE pStorage;
[41315]	532
	533	/** Pointer to the per-disk VD interface list. */
[48851]	534	PVDINTERFACE pVDIfsDisk;
[41315]	535	/** Pointer to the per-image VD interface list. */
[48851]	536	PVDINTERFACE pVDIfsImage;
[41315]	537	/** Error interface. */
[48851]	538	PVDINTERFACEERROR pIfError;
[41315]	539	/** I/O interface. */
[48851]	540	PVDINTERFACEIOINT pIfIo;
[41315]	541
	542	/** Open flags passed by VBoxHD layer. */
[48851]	543	unsigned uOpenFlags;
[41315]	544	/** Image flags defined during creation or determined during open. */
[48851]	545	unsigned uImageFlags;
[41315]	546	/** Version of the VHDX image format. */
[48851]	547	unsigned uVersion;
[41315]	548	/** Total size of the image. */
[48851]	549	uint64_t cbSize;
[41345]	550	/** Logical sector size of the image. */
[48851]	551	uint32_t cbLogicalSector;
[41345]	552	/** Block size of the image. */
[48851]	553	size_t cbBlock;
[41315]	554	/** Physical geometry of this image. */
[48851]	555	VDGEOMETRY PCHSGeometry;
[41315]	556	/** Logical geometry of this image. */
[48851]	557	VDGEOMETRY LCHSGeometry;
[41315]	558
[41345]	559	/** The BAT. */
[48851]	560	PVhdxBatEntry paBat;
[41345]	561	/** Chunk ratio. */
[48851]	562	uint32_t uChunkRatio;
[66486]	563	/** The static region list. */
	564	VDREGIONLIST RegionList;
[41315]	565	} VHDXIMAGE, *PVHDXIMAGE;
	566
	567	/**
	568	* Endianess conversion direction.
	569	*/
	570	typedef enum VHDXECONV
	571	{
	572	/** Host to file endianess. */
	573	VHDXECONV_H2F = 0,
	574	/** File to host endianess. */
	575	VHDXECONV_F2H
	576	} VHDXECONV;
	577
	578	/** Macros for endianess conversion. */
	579	#define SET_ENDIAN_U16(u16) (enmConv == VHDXECONV_H2F ? RT_H2LE_U16(u16) : RT_LE2H_U16(u16))
	580	#define SET_ENDIAN_U32(u32) (enmConv == VHDXECONV_H2F ? RT_H2LE_U32(u32) : RT_LE2H_U32(u32))
	581	#define SET_ENDIAN_U64(u64) (enmConv == VHDXECONV_H2F ? RT_H2LE_U64(u64) : RT_LE2H_U64(u64))
	582
	583
[57358]	584	/*********************************************************************************************************************************
	585	* Static Variables *
	586	*********************************************************************************************************************************/
	587
[41315]	588	/**
	589	* NULL-terminated array of supported file extensions.
	590	*/
	591	static const VDFILEEXTENSION s_aVhdxFileExtensions[] =
	592	{
	593	{"vhdx", VDTYPE_HDD},
	594	{NULL, VDTYPE_INVALID}
	595	};
	596
	597	/**
	598	* Static table to verify the metadata item properties and the flags.
	599	*/
	600	static const VHDXMETADATAITEMPROPS s_aVhdxMetadataItemProps[] =
	601	{
	602	/* pcszItemUuid fIsUser, fIsVDisk, fIsRequired, enmMetadataItem */
	603	{VHDX_METADATA_TBL_ENTRY_ITEM_FILE_PARAMS, false, false, true, VHDXMETADATAITEM_FILE_PARAMS},
	604	{VHDX_METADATA_TBL_ENTRY_ITEM_VDISK_SIZE, false, true, true, VHDXMETADATAITEM_VDISK_SIZE},
	605	{VHDX_METADATA_TBL_ENTRY_ITEM_PAGE83_DATA, false, true, true, VHDXMETADATAITEM_PAGE83_DATA},
	606	{VHDX_METADATA_TBL_ENTRY_ITEM_LOG_SECT_SIZE, false, true, true, VHDXMETADATAITEM_LOGICAL_SECTOR_SIZE},
[46029]	607	{VHDX_METADATA_TBL_ENTRY_ITEM_PHYS_SECT_SIZE, false, true, true, VHDXMETADATAITEM_PHYSICAL_SECTOR_SIZE},
[41315]	608	{VHDX_METADATA_TBL_ENTRY_ITEM_PARENT_LOCATOR, false, false, true, VHDXMETADATAITEM_PARENT_LOCATOR}
	609	};
	610
	611
[57358]	612	/*********************************************************************************************************************************
	613	* Internal Functions *
	614	*********************************************************************************************************************************/
	615
[41315]	616	/**
	617	* Converts the file identifier between file and host endianness.
	618	*
	619	* @param enmConv Direction of the conversion.
	620	* @param pFileIdentifierConv Where to store the converted file identifier.
	621	* @param pFileIdentifier The file identifier to convert.
	622	*
	623	* @note It is safe to use the same pointer for pFileIdentifierConv and pFileIdentifier.
	624	*/
	625	DECLINLINE(void) vhdxConvFileIdentifierEndianess(VHDXECONV enmConv, PVhdxFileIdentifier pFileIdentifierConv,
	626	PVhdxFileIdentifier pFileIdentifier)
	627	{
	628	pFileIdentifierConv->u64Signature = SET_ENDIAN_U64(pFileIdentifier->u64Signature);
	629	for (unsigned i = 0; i < RT_ELEMENTS(pFileIdentifierConv->awszCreator); i++)
	630	pFileIdentifierConv->awszCreator[i] = SET_ENDIAN_U16(pFileIdentifier->awszCreator[i]);
	631	}
	632
	633	/**
	634	* Converts a UUID between file and host endianness.
	635	*
	636	* @param enmConv Direction of the conversion.
	637	* @param pUuidConv Where to store the converted UUID.
	638	* @param pUuid The UUID to convert.
	639	*
	640	* @note It is safe to use the same pointer for pUuidConv and pUuid.
	641	*/
	642	DECLINLINE(void) vhdxConvUuidEndianess(VHDXECONV enmConv, PRTUUID pUuidConv, PRTUUID pUuid)
	643	{
[62743]	644	RT_NOREF1(enmConv);
[41447]	645	#if 1
[87753]	646	/** @todo r=andy Code looks temporary disabled to me, fixes strict release builds:
[87917]	647	* "accessing 16 bytes at offsets 0 and 0 overlaps 16 bytes at offset 0 [-Werror=restrict]" */
[87753]	648	RTUUID uuidTmp;
	649	memcpy(&uuidTmp, pUuid, sizeof(RTUUID));
	650	memcpy(pUuidConv, &uuidTmp, sizeof(RTUUID));
[41447]	651	#else
[41315]	652	pUuidConv->Gen.u32TimeLow = SET_ENDIAN_U32(pUuid->Gen.u32TimeLow);
	653	pUuidConv->Gen.u16TimeMid = SET_ENDIAN_U16(pUuid->Gen.u16TimeMid);
	654	pUuidConv->Gen.u16TimeHiAndVersion = SET_ENDIAN_U16(pUuid->Gen.u16TimeHiAndVersion);
	655	pUuidConv->Gen.u8ClockSeqHiAndReserved = pUuid->Gen.u8ClockSeqHiAndReserved;
	656	pUuidConv->Gen.u8ClockSeqLow = pUuid->Gen.u8ClockSeqLow;
[41317]	657	for (unsigned i = 0; i < RT_ELEMENTS(pUuidConv->Gen.au8Node); i++)
	658	pUuidConv->Gen.au8Node[i] = pUuid->Gen.au8Node[i];
[41447]	659	#endif
[41315]	660	}
	661
	662	/**
	663	* Converts a VHDX header between file and host endianness.
	664	*
	665	* @param enmConv Direction of the conversion.
	666	* @param pHdrConv Where to store the converted header.
	667	* @param pHdr The VHDX header to convert.
	668	*
	669	* @note It is safe to use the same pointer for pHdrConv and pHdr.
	670	*/
	671	DECLINLINE(void) vhdxConvHeaderEndianess(VHDXECONV enmConv, PVhdxHeader pHdrConv, PVhdxHeader pHdr)
	672	{
	673	pHdrConv->u32Signature = SET_ENDIAN_U32(pHdr->u32Signature);
	674	pHdrConv->u32Checksum = SET_ENDIAN_U32(pHdr->u32Checksum);
	675	pHdrConv->u64SequenceNumber = SET_ENDIAN_U64(pHdr->u64SequenceNumber);
	676	vhdxConvUuidEndianess(enmConv, &pHdrConv->UuidFileWrite, &pHdrConv->UuidFileWrite);
	677	vhdxConvUuidEndianess(enmConv, &pHdrConv->UuidDataWrite, &pHdrConv->UuidDataWrite);
	678	vhdxConvUuidEndianess(enmConv, &pHdrConv->UuidLog, &pHdrConv->UuidLog);
	679	pHdrConv->u16LogVersion = SET_ENDIAN_U16(pHdr->u16LogVersion);
	680	pHdrConv->u16Version = SET_ENDIAN_U16(pHdr->u16Version);
	681	pHdrConv->u32LogLength = SET_ENDIAN_U32(pHdr->u32LogLength);
	682	pHdrConv->u64LogOffset = SET_ENDIAN_U64(pHdr->u64LogOffset);
	683	}
	684
	685	/**
	686	* Converts a VHDX region table header between file and host endianness.
	687	*
	688	* @param enmConv Direction of the conversion.
	689	* @param pRegTblHdrConv Where to store the converted header.
	690	* @param pRegTblHdr The VHDX region table header to convert.
	691	*
	692	* @note It is safe to use the same pointer for pRegTblHdrConv and pRegTblHdr.
	693	*/
	694	DECLINLINE(void) vhdxConvRegionTblHdrEndianess(VHDXECONV enmConv, PVhdxRegionTblHdr pRegTblHdrConv,
	695	PVhdxRegionTblHdr pRegTblHdr)
	696	{
	697	pRegTblHdrConv->u32Signature = SET_ENDIAN_U32(pRegTblHdr->u32Signature);
	698	pRegTblHdrConv->u32Checksum = SET_ENDIAN_U32(pRegTblHdr->u32Checksum);
	699	pRegTblHdrConv->u32EntryCount = SET_ENDIAN_U32(pRegTblHdr->u32EntryCount);
	700	pRegTblHdrConv->u32Reserved = SET_ENDIAN_U32(pRegTblHdr->u32Reserved);
	701	}
	702
	703	/**
	704	* Converts a VHDX region table entry between file and host endianness.
	705	*
	706	* @param enmConv Direction of the conversion.
	707	* @param pRegTblEntConv Where to store the converted region table entry.
	708	* @param pRegTblEnt The VHDX region table entry to convert.
	709	*
	710	* @note It is safe to use the same pointer for pRegTblEntConv and pRegTblEnt.
	711	*/
	712	DECLINLINE(void) vhdxConvRegionTblEntryEndianess(VHDXECONV enmConv, PVhdxRegionTblEntry pRegTblEntConv,
	713	PVhdxRegionTblEntry pRegTblEnt)
	714	{
	715	vhdxConvUuidEndianess(enmConv, &pRegTblEntConv->UuidObject, &pRegTblEnt->UuidObject);
	716	pRegTblEntConv->u64FileOffset = SET_ENDIAN_U64(pRegTblEnt->u64FileOffset);
	717	pRegTblEntConv->u32Length = SET_ENDIAN_U32(pRegTblEnt->u32Length);
	718	pRegTblEntConv->u32Flags = SET_ENDIAN_U32(pRegTblEnt->u32Flags);
	719	}
	720
[63495]	721	#if 0 /* unused */
	722
[41315]	723	/**
	724	* Converts a VHDX log entry header between file and host endianness.
	725	*
	726	* @param enmConv Direction of the conversion.
	727	* @param pLogEntryHdrConv Where to store the converted log entry header.
	728	* @param pLogEntryHdr The VHDX log entry header to convert.
	729	*
	730	* @note It is safe to use the same pointer for pLogEntryHdrConv and pLogEntryHdr.
	731	*/
	732	DECLINLINE(void) vhdxConvLogEntryHdrEndianess(VHDXECONV enmConv, PVhdxLogEntryHdr pLogEntryHdrConv,
	733	PVhdxLogEntryHdr pLogEntryHdr)
	734	{
	735	pLogEntryHdrConv->u32Signature = SET_ENDIAN_U32(pLogEntryHdr->u32Signature);
	736	pLogEntryHdrConv->u32Checksum = SET_ENDIAN_U32(pLogEntryHdr->u32Checksum);
	737	pLogEntryHdrConv->u32EntryLength = SET_ENDIAN_U32(pLogEntryHdr->u32EntryLength);
	738	pLogEntryHdrConv->u32Tail = SET_ENDIAN_U32(pLogEntryHdr->u32Tail);
	739	pLogEntryHdrConv->u64SequenceNumber = SET_ENDIAN_U64(pLogEntryHdr->u64SequenceNumber);
	740	pLogEntryHdrConv->u32DescriptorCount = SET_ENDIAN_U32(pLogEntryHdr->u32DescriptorCount);
	741	pLogEntryHdrConv->u32Reserved = SET_ENDIAN_U32(pLogEntryHdr->u32Reserved);
	742	vhdxConvUuidEndianess(enmConv, &pLogEntryHdrConv->UuidLog, &pLogEntryHdr->UuidLog);
	743	pLogEntryHdrConv->u64FlushedFileOffset = SET_ENDIAN_U64(pLogEntryHdr->u64FlushedFileOffset);
	744	}
	745
	746	/**
	747	* Converts a VHDX log zero descriptor between file and host endianness.
	748	*
	749	* @param enmConv Direction of the conversion.
	750	* @param pLogZeroDescConv Where to store the converted log zero descriptor.
	751	* @param pLogZeroDesc The VHDX log zero descriptor to convert.
	752	*
	753	* @note It is safe to use the same pointer for pLogZeroDescConv and pLogZeroDesc.
	754	*/
	755	DECLINLINE(void) vhdxConvLogZeroDescEndianess(VHDXECONV enmConv, PVhdxLogZeroDesc pLogZeroDescConv,
	756	PVhdxLogZeroDesc pLogZeroDesc)
	757	{
	758	pLogZeroDescConv->u32ZeroSignature = SET_ENDIAN_U32(pLogZeroDesc->u32ZeroSignature);
	759	pLogZeroDescConv->u32Reserved = SET_ENDIAN_U32(pLogZeroDesc->u32Reserved);
	760	pLogZeroDescConv->u64ZeroLength = SET_ENDIAN_U64(pLogZeroDesc->u64ZeroLength);
	761	pLogZeroDescConv->u64FileOffset = SET_ENDIAN_U64(pLogZeroDesc->u64FileOffset);
	762	pLogZeroDescConv->u64SequenceNumber = SET_ENDIAN_U64(pLogZeroDesc->u64SequenceNumber);
	763	}
	764
[63495]	765
[41315]	766	/**
	767	* Converts a VHDX log data descriptor between file and host endianness.
	768	*
	769	* @param enmConv Direction of the conversion.
	770	* @param pLogDataDescConv Where to store the converted log data descriptor.
	771	* @param pLogDataDesc The VHDX log data descriptor to convert.
	772	*
	773	* @note It is safe to use the same pointer for pLogDataDescConv and pLogDataDesc.
	774	*/
	775	DECLINLINE(void) vhdxConvLogDataDescEndianess(VHDXECONV enmConv, PVhdxLogDataDesc pLogDataDescConv,
	776	PVhdxLogDataDesc pLogDataDesc)
	777	{
	778	pLogDataDescConv->u32DataSignature = SET_ENDIAN_U32(pLogDataDesc->u32DataSignature);
	779	pLogDataDescConv->u32TrailingBytes = SET_ENDIAN_U32(pLogDataDesc->u32TrailingBytes);
	780	pLogDataDescConv->u64LeadingBytes = SET_ENDIAN_U64(pLogDataDesc->u64LeadingBytes);
	781	pLogDataDescConv->u64FileOffset = SET_ENDIAN_U64(pLogDataDesc->u64FileOffset);
	782	pLogDataDescConv->u64SequenceNumber = SET_ENDIAN_U64(pLogDataDesc->u64SequenceNumber);
	783	}
	784
[63495]	785
[41315]	786	/**
	787	* Converts a VHDX log data sector between file and host endianness.
	788	*
	789	* @param enmConv Direction of the conversion.
	790	* @param pLogDataSectorConv Where to store the converted log data sector.
	791	* @param pLogDataSector The VHDX log data sector to convert.
	792	*
	793	* @note It is safe to use the same pointer for pLogDataSectorConv and pLogDataSector.
	794	*/
	795	DECLINLINE(void) vhdxConvLogDataSectorEndianess(VHDXECONV enmConv, PVhdxLogDataSector pLogDataSectorConv,
	796	PVhdxLogDataSector pLogDataSector)
	797	{
	798	pLogDataSectorConv->u32DataSignature = SET_ENDIAN_U32(pLogDataSector->u32DataSignature);
	799	pLogDataSectorConv->u32SequenceHigh = SET_ENDIAN_U32(pLogDataSector->u32SequenceHigh);
	800	pLogDataSectorConv->u32SequenceLow = SET_ENDIAN_U32(pLogDataSector->u32SequenceLow);
	801	}
	802
[63495]	803	#endif /* unused */
	804
[41315]	805	/**
[41345]	806	* Converts a BAT between file and host endianess.
	807	*
	808	* @param enmConv Direction of the conversion.
	809	* @param paBatEntriesConv Where to store the converted BAT.
	810	* @param paBatEntries The VHDX BAT to convert.
[64272]	811	* @param cBatEntries Number of entries in the BAT.
[41345]	812	*
	813	* @note It is safe to use the same pointer for paBatEntriesConv and paBatEntries.
	814	*/
	815	DECLINLINE(void) vhdxConvBatTableEndianess(VHDXECONV enmConv, PVhdxBatEntry paBatEntriesConv,
	816	PVhdxBatEntry paBatEntries, uint32_t cBatEntries)
	817	{
	818	for (uint32_t i = 0; i < cBatEntries; i++)
	819	paBatEntriesConv[i].u64BatEntry = SET_ENDIAN_U64(paBatEntries[i].u64BatEntry);
	820	}
	821
	822	/**
[41315]	823	* Converts a VHDX metadata table header between file and host endianness.
	824	*
	825	* @param enmConv Direction of the conversion.
	826	* @param pMetadataTblHdrConv Where to store the converted metadata table header.
	827	* @param pMetadataTblHdr The VHDX metadata table header to convert.
	828	*
	829	* @note It is safe to use the same pointer for pMetadataTblHdrConv and pMetadataTblHdr.
	830	*/
	831	DECLINLINE(void) vhdxConvMetadataTblHdrEndianess(VHDXECONV enmConv, PVhdxMetadataTblHdr pMetadataTblHdrConv,
	832	PVhdxMetadataTblHdr pMetadataTblHdr)
	833	{
	834	pMetadataTblHdrConv->u64Signature = SET_ENDIAN_U64(pMetadataTblHdr->u64Signature);
	835	pMetadataTblHdrConv->u16Reserved = SET_ENDIAN_U16(pMetadataTblHdr->u16Reserved);
	836	pMetadataTblHdrConv->u16EntryCount = SET_ENDIAN_U16(pMetadataTblHdr->u16EntryCount);
	837	for (unsigned i = 0; i < RT_ELEMENTS(pMetadataTblHdr->u32Reserved2); i++)
	838	pMetadataTblHdrConv->u32Reserved2[i] = SET_ENDIAN_U32(pMetadataTblHdr->u32Reserved2[i]);
	839	}
	840
	841	/**
	842	* Converts a VHDX metadata table entry between file and host endianness.
	843	*
	844	* @param enmConv Direction of the conversion.
	845	* @param pMetadataTblEntryConv Where to store the converted metadata table entry.
	846	* @param pMetadataTblEntry The VHDX metadata table entry to convert.
	847	*
	848	* @note It is safe to use the same pointer for pMetadataTblEntryConv and pMetadataTblEntry.
	849	*/
	850	DECLINLINE(void) vhdxConvMetadataTblEntryEndianess(VHDXECONV enmConv, PVhdxMetadataTblEntry pMetadataTblEntryConv,
	851	PVhdxMetadataTblEntry pMetadataTblEntry)
	852	{
	853	vhdxConvUuidEndianess(enmConv, &pMetadataTblEntryConv->UuidItem, &pMetadataTblEntry->UuidItem);
	854	pMetadataTblEntryConv->u32Offset = SET_ENDIAN_U32(pMetadataTblEntry->u32Offset);
	855	pMetadataTblEntryConv->u32Length = SET_ENDIAN_U32(pMetadataTblEntry->u32Length);
	856	pMetadataTblEntryConv->u32Flags = SET_ENDIAN_U32(pMetadataTblEntry->u32Flags);
	857	pMetadataTblEntryConv->u32Reserved = SET_ENDIAN_U32(pMetadataTblEntry->u32Reserved);
	858	}
	859
	860	/**
	861	* Converts a VHDX file parameters item between file and host endianness.
	862	*
	863	* @param enmConv Direction of the conversion.
	864	* @param pFileParamsConv Where to store the converted file parameters item entry.
	865	* @param pFileParams The VHDX file parameters item to convert.
	866	*
	867	* @note It is safe to use the same pointer for pFileParamsConv and pFileParams.
	868	*/
	869	DECLINLINE(void) vhdxConvFileParamsEndianess(VHDXECONV enmConv, PVhdxFileParameters pFileParamsConv,
	870	PVhdxFileParameters pFileParams)
	871	{
	872	pFileParamsConv->u32BlockSize = SET_ENDIAN_U32(pFileParams->u32BlockSize);
	873	pFileParamsConv->u32Flags = SET_ENDIAN_U32(pFileParams->u32Flags);
	874	}
	875
	876	/**
	877	* Converts a VHDX virtual disk size item between file and host endianness.
	878	*
	879	* @param enmConv Direction of the conversion.
	880	* @param pVDiskSizeConv Where to store the converted virtual disk size item entry.
	881	* @param pVDiskSize The VHDX virtual disk size item to convert.
	882	*
	883	* @note It is safe to use the same pointer for pVDiskSizeConv and pVDiskSize.
	884	*/
	885	DECLINLINE(void) vhdxConvVDiskSizeEndianess(VHDXECONV enmConv, PVhdxVDiskSize pVDiskSizeConv,
	886	PVhdxVDiskSize pVDiskSize)
	887	{
	888	pVDiskSizeConv->u64VDiskSize = SET_ENDIAN_U64(pVDiskSize->u64VDiskSize);
	889	}
	890
[63495]	891	#if 0 /* unused */
	892
[41315]	893	/**
	894	* Converts a VHDX page 83 data item between file and host endianness.
	895	*
	896	* @param enmConv Direction of the conversion.
	897	* @param pPage83DataConv Where to store the converted page 83 data item entry.
	898	* @param pPage83Data The VHDX page 83 data item to convert.
	899	*
	900	* @note It is safe to use the same pointer for pPage83DataConv and pPage83Data.
	901	*/
	902	DECLINLINE(void) vhdxConvPage83DataEndianess(VHDXECONV enmConv, PVhdxPage83Data pPage83DataConv,
	903	PVhdxPage83Data pPage83Data)
	904	{
	905	vhdxConvUuidEndianess(enmConv, &pPage83DataConv->UuidPage83Data, &pPage83Data->UuidPage83Data);
	906	}
[63495]	907	#endif /* unused */
[41315]	908
	909	/**
	910	* Converts a VHDX logical sector size item between file and host endianness.
	911	*
	912	* @param enmConv Direction of the conversion.
	913	* @param pVDiskLogSectSizeConv Where to store the converted logical sector size item entry.
	914	* @param pVDiskLogSectSize The VHDX logical sector size item to convert.
	915	*
	916	* @note It is safe to use the same pointer for pVDiskLogSectSizeConv and pVDiskLogSectSize.
	917	*/
	918	DECLINLINE(void) vhdxConvVDiskLogSectSizeEndianess(VHDXECONV enmConv, PVhdxVDiskLogicalSectorSize pVDiskLogSectSizeConv,
	919	PVhdxVDiskLogicalSectorSize pVDiskLogSectSize)
	920	{
[41345]	921	pVDiskLogSectSizeConv->u32LogicalSectorSize = SET_ENDIAN_U32(pVDiskLogSectSize->u32LogicalSectorSize);
[41315]	922	}
	923
[63495]	924	#if 0 /* unused */
	925
[41315]	926	/**
	927	* Converts a VHDX physical sector size item between file and host endianness.
	928	*
	929	* @param enmConv Direction of the conversion.
	930	* @param pVDiskPhysSectSizeConv Where to store the converted physical sector size item entry.
	931	* @param pVDiskPhysSectSize The VHDX physical sector size item to convert.
	932	*
	933	* @note It is safe to use the same pointer for pVDiskPhysSectSizeConv and pVDiskPhysSectSize.
	934	*/
	935	DECLINLINE(void) vhdxConvVDiskPhysSectSizeEndianess(VHDXECONV enmConv, PVhdxVDiskPhysicalSectorSize pVDiskPhysSectSizeConv,
	936	PVhdxVDiskPhysicalSectorSize pVDiskPhysSectSize)
	937	{
	938	pVDiskPhysSectSizeConv->u64PhysicalSectorSize = SET_ENDIAN_U64(pVDiskPhysSectSize->u64PhysicalSectorSize);
	939	}
	940
[63495]	941
[41315]	942	/**
	943	* Converts a VHDX parent locator header item between file and host endianness.
	944	*
	945	* @param enmConv Direction of the conversion.
	946	* @param pParentLocatorHdrConv Where to store the converted parent locator header item entry.
	947	* @param pParentLocatorHdr The VHDX parent locator header item to convert.
	948	*
	949	* @note It is safe to use the same pointer for pParentLocatorHdrConv and pParentLocatorHdr.
	950	*/
	951	DECLINLINE(void) vhdxConvParentLocatorHeaderEndianness(VHDXECONV enmConv, PVhdxParentLocatorHeader pParentLocatorHdrConv,
	952	PVhdxParentLocatorHeader pParentLocatorHdr)
	953	{
	954	vhdxConvUuidEndianess(enmConv, &pParentLocatorHdrConv->UuidLocatorType, &pParentLocatorHdr->UuidLocatorType);
	955	pParentLocatorHdrConv->u16Reserved = SET_ENDIAN_U16(pParentLocatorHdr->u16Reserved);
	956	pParentLocatorHdrConv->u16KeyValueCount = SET_ENDIAN_U16(pParentLocatorHdr->u16KeyValueCount);
	957	}
	958
[63495]	959
[41315]	960	/**
	961	* Converts a VHDX parent locator entry between file and host endianness.
	962	*
	963	* @param enmConv Direction of the conversion.
	964	* @param pParentLocatorEntryConv Where to store the converted parent locator entry.
	965	* @param pParentLocatorEntry The VHDX parent locator entry to convert.
	966	*
	967	* @note It is safe to use the same pointer for pParentLocatorEntryConv and pParentLocatorEntry.
	968	*/
	969	DECLINLINE(void) vhdxConvParentLocatorEntryEndianess(VHDXECONV enmConv, PVhdxParentLocatorEntry pParentLocatorEntryConv,
	970	PVhdxParentLocatorEntry pParentLocatorEntry)
	971	{
	972	pParentLocatorEntryConv->u32KeyOffset = SET_ENDIAN_U32(pParentLocatorEntry->u32KeyOffset);
	973	pParentLocatorEntryConv->u32ValueOffset = SET_ENDIAN_U32(pParentLocatorEntry->u32ValueOffset);
	974	pParentLocatorEntryConv->u16KeyLength = SET_ENDIAN_U16(pParentLocatorEntry->u16KeyLength);
	975	pParentLocatorEntryConv->u16ValueLength = SET_ENDIAN_U16(pParentLocatorEntry->u16ValueLength);
	976	}
	977
[63495]	978	#endif /* unused */
	979
[41315]	980	/**
	981	* Internal. Free all allocated space for representing an image except pImage,
	982	* and optionally delete the image from disk.
	983	*/
	984	static int vhdxFreeImage(PVHDXIMAGE pImage, bool fDelete)
	985	{
	986	int rc = VINF_SUCCESS;
	987
	988	/* Freeing a never allocated image (e.g. because the open failed) is
	989	* not signalled as an error. After all nothing bad happens. */
	990	if (pImage)
	991	{
	992	if (pImage->pStorage)
	993	{
[46613]	994	rc = vdIfIoIntFileClose(pImage->pIfIo, pImage->pStorage);
[41315]	995	pImage->pStorage = NULL;
	996	}
	997
[41345]	998	if (pImage->paBat)
	999	{
	1000	RTMemFree(pImage->paBat);
	1001	pImage->paBat = NULL;
	1002	}
	1003
[41315]	1004	if (fDelete && pImage->pszFilename)
	1005	vdIfIoIntFileDelete(pImage->pIfIo, pImage->pszFilename);
	1006	}
	1007
	1008	LogFlowFunc(("returns %Rrc\n", rc));
	1009	return rc;
	1010	}
	1011
	1012	/**
	1013	* Loads all required fields from the given VHDX header.
	1014	* The header must be converted to the host endianess and validated already.
	1015	*
	1016	* @returns VBox status code.
	1017	* @param pImage Image instance data.
	1018	* @param pHdr The header to load.
	1019	*/
	1020	static int vhdxLoadHeader(PVHDXIMAGE pImage, PVhdxHeader pHdr)
	1021	{
	1022	int rc = VINF_SUCCESS;
	1023
	1024	LogFlowFunc(("pImage=%#p pHdr=%#p\n", pImage, pHdr));
	1025
	1026	/*
	1027	* Most fields in the header are not required because the backend implements
	1028	* readonly access only so far.
	1029	* We just have to check that the log is empty, we have to refuse to load the
	1030	* image otherwsie because replaying the log is not implemented.
	1031	*/
	1032	if (pHdr->u16Version == VHDX_HEADER_VHDX_VERSION)
	1033	{
	1034	/* Check that the log UUID is zero. */
	1035	pImage->uVersion = pHdr->u16Version;
	1036	if (!RTUuidIsNull(&pHdr->UuidLog))
	1037	rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
	1038	"VHDX: Image \'%s\' has a non empty log which is not supported",
	1039	pImage->pszFilename);
	1040	}
	1041	else
	1042	rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
	1043	"VHDX: Image \'%s\' uses an unsupported version (%u) of the VHDX format",
	1044	pImage->pszFilename, pHdr->u16Version);
	1045
	1046	LogFlowFunc(("return rc=%Rrc\n", rc));
	1047	return rc;
	1048	}
	1049
	1050	/**
	1051	* Determines the current header and loads it.
	1052	*
	1053	* @returns VBox status code.
	1054	* @param pImage Image instance data.
	1055	*/
	1056	static int vhdxFindAndLoadCurrentHeader(PVHDXIMAGE pImage)
	1057	{
[41447]	1058	PVhdxHeader pHdr1, pHdr2;
[41315]	1059	uint32_t u32ChkSum = 0;
	1060	uint32_t u32ChkSumSaved = 0;
	1061	bool fHdr1Valid = false;
	1062	bool fHdr2Valid = false;
	1063	int rc = VINF_SUCCESS;
	1064
	1065	LogFlowFunc(("pImage=%#p\n", pImage));
	1066
	1067	/*
	1068	* The VHDX format defines two headers at different offsets to provide failure
	1069	* consistency. Only one header is current. This can be determined using the
	1070	* sequence number and checksum fields in the header.
	1071	*/
[41447]	1072	pHdr1 = (PVhdxHeader)RTMemAllocZ(sizeof(VhdxHeader));
	1073	pHdr2 = (PVhdxHeader)RTMemAllocZ(sizeof(VhdxHeader));
[41315]	1074
[41447]	1075	if (pHdr1 && pHdr2)
[41315]	1076	{
[41447]	1077	/* Read the first header. */
	1078	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, VHDX_HEADER1_OFFSET,
[44233]	1079	pHdr1, sizeof(*pHdr1));
[41447]	1080	if (RT_SUCCESS(rc))
	1081	{
	1082	vhdxConvHeaderEndianess(VHDXECONV_F2H, pHdr1, pHdr1);
[41315]	1083
[41447]	1084	/* Validate checksum. */
	1085	u32ChkSumSaved = pHdr1->u32Checksum;
	1086	pHdr1->u32Checksum = 0;
[50526]	1087	u32ChkSum = RTCrc32C(pHdr1, sizeof(VhdxHeader));
[41315]	1088
[41447]	1089	if ( pHdr1->u32Signature == VHDX_HEADER_SIGNATURE
[50526]	1090	&& u32ChkSum == u32ChkSumSaved)
[41447]	1091	fHdr1Valid = true;
	1092	}
[41315]	1093
[41447]	1094	/* Try to read the second header in any case (even if reading the first failed). */
	1095	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, VHDX_HEADER2_OFFSET,
[44233]	1096	pHdr2, sizeof(*pHdr2));
[41447]	1097	if (RT_SUCCESS(rc))
	1098	{
	1099	vhdxConvHeaderEndianess(VHDXECONV_F2H, pHdr2, pHdr2);
[41315]	1100
[41447]	1101	/* Validate checksum. */
	1102	u32ChkSumSaved = pHdr2->u32Checksum;
	1103	pHdr2->u32Checksum = 0;
[50526]	1104	u32ChkSum = RTCrc32C(pHdr2, sizeof(VhdxHeader));
[41315]	1105
[41447]	1106	if ( pHdr2->u32Signature == VHDX_HEADER_SIGNATURE
[50526]	1107	&& u32ChkSum == u32ChkSumSaved)
[41447]	1108	fHdr2Valid = true;
	1109	}
[41315]	1110
[41447]	1111	/* Determine the current header. */
	1112	if (fHdr1Valid != fHdr2Valid)
	1113	{
	1114	/* Only one header is valid - use it. */
	1115	rc = vhdxLoadHeader(pImage, fHdr1Valid ? pHdr1 : pHdr2);
	1116	}
	1117	else if (!fHdr1Valid && !fHdr2Valid)
	1118	{
	1119	/* Crap, both headers are corrupt, refuse to load the image. */
	1120	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1121	"VHDX: Can not load the image because both headers are corrupt");
	1122	}
	1123	else
	1124	{
	1125	/* Both headers are valid. Use the sequence number to find the current one. */
	1126	if (pHdr1->u64SequenceNumber > pHdr2->u64SequenceNumber)
	1127	rc = vhdxLoadHeader(pImage, pHdr1);
	1128	else
	1129	rc = vhdxLoadHeader(pImage, pHdr2);
	1130	}
[41315]	1131	}
	1132	else
[41447]	1133	rc = vdIfError(pImage->pIfError, VERR_NO_MEMORY, RT_SRC_POS,
	1134	"VHDX: Out of memory while allocating memory for the header");
[41315]	1135
[41447]	1136	if (pHdr1)
	1137	RTMemFree(pHdr1);
	1138	if (pHdr2)
	1139	RTMemFree(pHdr2);
	1140
[41315]	1141	LogFlowFunc(("returns rc=%Rrc\n", rc));
	1142	return rc;
	1143	}
	1144
	1145	/**
	1146	* Loads the BAT region.
	1147	*
	1148	* @returns VBox status code.
	1149	* @param pImage Image instance data.
	1150	* @param offRegion Start offset of the region.
	1151	* @param cbRegion Size of the region.
	1152	*/
	1153	static int vhdxLoadBatRegion(PVHDXIMAGE pImage, uint64_t offRegion,
	1154	size_t cbRegion)
	1155	{
	1156	int rc = VINF_SUCCESS;
[41345]	1157	uint32_t cDataBlocks;
	1158	uint32_t uChunkRatio;
	1159	uint32_t cBatEntries;
	1160	uint32_t cbBatEntries;
	1161	PVhdxBatEntry paBatEntries = NULL;
[41315]	1162
	1163	LogFlowFunc(("pImage=%#p\n", pImage));
	1164
[41350]	1165	/* Calculate required values first. */
[48851]	1166	uint64_t uChunkRatio64 = (RT_BIT_64(23) * pImage->cbLogicalSector) / pImage->cbBlock;
	1167	uChunkRatio = (uint32_t)uChunkRatio64; Assert(uChunkRatio == uChunkRatio64);
	1168	uint64_t cDataBlocks64 = pImage->cbSize / pImage->cbBlock;
	1169	cDataBlocks = (uint32_t)cDataBlocks64; Assert(cDataBlocks == cDataBlocks64);
	1170
[41345]	1171	if (pImage->cbSize % pImage->cbBlock)
	1172	cDataBlocks++;
	1173
	1174	cBatEntries = cDataBlocks + (cDataBlocks - 1)/uChunkRatio;
	1175	cbBatEntries = cBatEntries * sizeof(VhdxBatEntry);
	1176
	1177	if (cbBatEntries <= cbRegion)
	1178	{
	1179	/*
	1180	* Load the complete BAT region first, convert to host endianess and process
	1181	* it afterwards. The SB entries can be removed because they are not needed yet.
	1182	*/
	1183	paBatEntries = (PVhdxBatEntry)RTMemAlloc(cbBatEntries);
	1184	if (paBatEntries)
	1185	{
	1186	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offRegion,
[44233]	1187	paBatEntries, cbBatEntries);
[41345]	1188	if (RT_SUCCESS(rc))
	1189	{
	1190	vhdxConvBatTableEndianess(VHDXECONV_F2H, paBatEntries, paBatEntries,
	1191	cBatEntries);
	1192
	1193	/* Go through the table and validate it. */
	1194	for (unsigned i = 0; i < cBatEntries; i++)
	1195	{
	1196	if ( i != 0
	1197	&& (i % uChunkRatio) == 0)
	1198	{
[46029]	1199	/**
	1200	* Disabled the verification because there are images out there with the sector bitmap
	1201	* marked as present. The entry is never accessed and the image is readonly anyway,
	1202	* so no harm done.
	1203	*/
	1204	#if 0
[41345]	1205	/* Sector bitmap block. */
	1206	if ( VHDX_BAT_ENTRY_GET_STATE(paBatEntries[i].u64BatEntry)
	1207	!= VHDX_BAT_ENTRY_SB_BLOCK_NOT_PRESENT)
	1208	{
	1209	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1210	"VHDX: Sector bitmap block at entry %u of image \'%s\' marked as present, violation of the specification",
	1211	i, pImage->pszFilename);
	1212	break;
	1213	}
[46029]	1214	#endif
[41345]	1215	}
	1216	else
	1217	{
	1218	/* Payload block. */
	1219	if ( VHDX_BAT_ENTRY_GET_STATE(paBatEntries[i].u64BatEntry)
	1220	== VHDX_BAT_ENTRY_PAYLOAD_BLOCK_PARTIALLY_PRESENT)
	1221	{
	1222	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1223	"VHDX: Payload block at entry %u of image \'%s\' marked as partially present, violation of the specification",
	1224	i, pImage->pszFilename);
	1225	break;
	1226	}
	1227	}
	1228	}
	1229
	1230	if (RT_SUCCESS(rc))
	1231	{
	1232	pImage->paBat = paBatEntries;
	1233	pImage->uChunkRatio = uChunkRatio;
	1234	}
	1235	}
	1236	else
	1237	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
	1238	"VHDX: Error reading the BAT from image \'%s\'",
	1239	pImage->pszFilename);
	1240	}
	1241	else
	1242	rc = vdIfError(pImage->pIfError, VERR_NO_MEMORY, RT_SRC_POS,
	1243	"VHDX: Out of memory allocating memory for %u BAT entries of image \'%s\'",
[57007]	1244	cBatEntries, pImage->pszFilename);
[41345]	1245	}
	1246	else
	1247	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1248	"VHDX: Mismatch between calculated number of BAT entries and region size (expected %u got %u) for image \'%s\'",
	1249	cbBatEntries, cbRegion, pImage->pszFilename);
	1250
	1251	if ( RT_FAILURE(rc)
	1252	&& paBatEntries)
	1253	RTMemFree(paBatEntries);
	1254
[41315]	1255	LogFlowFunc(("returns rc=%Rrc\n", rc));
	1256	return rc;
	1257	}
	1258
	1259	/**
[41345]	1260	* Load the file parameters metadata item from the file.
	1261	*
	1262	* @returns VBox status code.
	1263	* @param pImage Image instance data.
	1264	* @param offItem File offset where the data is stored.
	1265	* @param cbItem Size of the item in the file.
	1266	*/
	1267	static int vhdxLoadFileParametersMetadata(PVHDXIMAGE pImage, uint64_t offItem, size_t cbItem)
	1268	{
	1269	int rc = VINF_SUCCESS;
	1270
	1271	LogFlowFunc(("pImage=%#p offItem=%llu cbItem=%zu\n", pImage, offItem, cbItem));
	1272
	1273	if (cbItem != sizeof(VhdxFileParameters))
	1274	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1275	"VHDX: File parameters item size mismatch (expected %u got %zu) in image \'%s\'",
	1276	sizeof(VhdxFileParameters), cbItem, pImage->pszFilename);
	1277	else
	1278	{
	1279	VhdxFileParameters FileParameters;
	1280
	1281	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offItem,
[44233]	1282	&FileParameters, sizeof(FileParameters));
[41345]	1283	if (RT_SUCCESS(rc))
	1284	{
	1285	vhdxConvFileParamsEndianess(VHDXECONV_F2H, &FileParameters, &FileParameters);
	1286	pImage->cbBlock = FileParameters.u32BlockSize;
	1287
[63567]	1288	/** @todo No support for differencing images yet. */
[41345]	1289	if (FileParameters.u32Flags & VHDX_FILE_PARAMETERS_FLAGS_HAS_PARENT)
	1290	rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
	1291	"VHDX: Image \'%s\' is a differencing image which is not supported yet",
	1292	pImage->pszFilename);
	1293	}
	1294	else
	1295	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
	1296	"VHDX: Reading the file parameters metadata item from image \'%s\' failed",
	1297	pImage->pszFilename);
	1298	}
	1299
	1300	LogFlowFunc(("returns rc=%Rrc\n", rc));
	1301	return rc;
	1302	}
	1303
	1304	/**
	1305	* Load the virtual disk size metadata item from the file.
	1306	*
	1307	* @returns VBox status code.
	1308	* @param pImage Image instance data.
	1309	* @param offItem File offset where the data is stored.
	1310	* @param cbItem Size of the item in the file.
	1311	*/
	1312	static int vhdxLoadVDiskSizeMetadata(PVHDXIMAGE pImage, uint64_t offItem, size_t cbItem)
	1313	{
	1314	int rc = VINF_SUCCESS;
	1315
	1316	LogFlowFunc(("pImage=%#p offItem=%llu cbItem=%zu\n", pImage, offItem, cbItem));
	1317
	1318	if (cbItem != sizeof(VhdxVDiskSize))
	1319	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1320	"VHDX: Virtual disk size item size mismatch (expected %u got %zu) in image \'%s\'",
	1321	sizeof(VhdxVDiskSize), cbItem, pImage->pszFilename);
	1322	else
	1323	{
	1324	VhdxVDiskSize VDiskSize;
	1325
	1326	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offItem,
[44233]	1327	&VDiskSize, sizeof(VDiskSize));
[41345]	1328	if (RT_SUCCESS(rc))
	1329	{
	1330	vhdxConvVDiskSizeEndianess(VHDXECONV_F2H, &VDiskSize, &VDiskSize);
	1331	pImage->cbSize = VDiskSize.u64VDiskSize;
	1332	}
	1333	else
	1334	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
	1335	"VHDX: Reading the virtual disk size metadata item from image \'%s\' failed",
	1336	pImage->pszFilename);
	1337	}
	1338
	1339	LogFlowFunc(("returns rc=%Rrc\n", rc));
	1340	return rc;
	1341	}
	1342
	1343	/**
	1344	* Load the logical sector size metadata item from the file.
	1345	*
	1346	* @returns VBox status code.
	1347	* @param pImage Image instance data.
	1348	* @param offItem File offset where the data is stored.
	1349	* @param cbItem Size of the item in the file.
	1350	*/
	1351	static int vhdxLoadVDiskLogSectorSizeMetadata(PVHDXIMAGE pImage, uint64_t offItem, size_t cbItem)
	1352	{
	1353	int rc = VINF_SUCCESS;
	1354
	1355	LogFlowFunc(("pImage=%#p offItem=%llu cbItem=%zu\n", pImage, offItem, cbItem));
	1356
	1357	if (cbItem != sizeof(VhdxVDiskLogicalSectorSize))
	1358	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1359	"VHDX: Virtual disk logical sector size item size mismatch (expected %u got %zu) in image \'%s\'",
	1360	sizeof(VhdxVDiskLogicalSectorSize), cbItem, pImage->pszFilename);
	1361	else
	1362	{
	1363	VhdxVDiskLogicalSectorSize VDiskLogSectSize;
	1364
	1365	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offItem,
[44233]	1366	&VDiskLogSectSize, sizeof(VDiskLogSectSize));
[41345]	1367	if (RT_SUCCESS(rc))
	1368	{
	1369	vhdxConvVDiskLogSectSizeEndianess(VHDXECONV_F2H, &VDiskLogSectSize,
	1370	&VDiskLogSectSize);
	1371	pImage->cbLogicalSector = VDiskLogSectSize.u32LogicalSectorSize;
	1372	}
	1373	else
	1374	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
	1375	"VHDX: Reading the virtual disk logical sector size metadata item from image \'%s\' failed",
	1376	pImage->pszFilename);
	1377	}
	1378
	1379	LogFlowFunc(("returns rc=%Rrc\n", rc));
	1380	return rc;
	1381	}
	1382
	1383	/**
[41315]	1384	* Loads the metadata region.
	1385	*
	1386	* @returns VBox status code.
	1387	* @param pImage Image instance data.
	1388	* @param offRegion Start offset of the region.
	1389	* @param cbRegion Size of the region.
	1390	*/
	1391	static int vhdxLoadMetadataRegion(PVHDXIMAGE pImage, uint64_t offRegion,
	1392	size_t cbRegion)
	1393	{
	1394	VhdxMetadataTblHdr MetadataTblHdr;
	1395	int rc = VINF_SUCCESS;
	1396
	1397	LogFlowFunc(("pImage=%#p\n", pImage));
	1398
	1399	/* Load the header first. */
	1400	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offRegion,
[44233]	1401	&MetadataTblHdr, sizeof(MetadataTblHdr));
[41315]	1402	if (RT_SUCCESS(rc))
	1403	{
	1404	vhdxConvMetadataTblHdrEndianess(VHDXECONV_F2H, &MetadataTblHdr, &MetadataTblHdr);
	1405
	1406	/* Validate structure. */
	1407	if (MetadataTblHdr.u64Signature != VHDX_METADATA_TBL_HDR_SIGNATURE)
	1408	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1409	"VHDX: Incorrect metadata table header signature for image \'%s\'",
	1410	pImage->pszFilename);
	1411	else if (MetadataTblHdr.u16EntryCount > VHDX_METADATA_TBL_HDR_ENTRY_COUNT_MAX)
	1412	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1413	"VHDX: Incorrect entry count in metadata table header of image \'%s\'",
	1414	pImage->pszFilename);
	1415	else if (cbRegion < (MetadataTblHdr.u16EntryCount * sizeof(VhdxMetadataTblEntry) + sizeof(VhdxMetadataTblHdr)))
	1416	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1417	"VHDX: Metadata table of image \'%s\' exceeds region size",
	1418	pImage->pszFilename);
	1419
	1420	if (RT_SUCCESS(rc))
	1421	{
	1422	uint64_t offMetadataTblEntry = offRegion + sizeof(VhdxMetadataTblHdr);
	1423
	1424	for (unsigned i = 0; i < MetadataTblHdr.u16EntryCount; i++)
	1425	{
	1426	uint64_t offMetadataItem = 0;
	1427	VHDXMETADATAITEM enmMetadataItem = VHDXMETADATAITEM_UNKNOWN;
	1428	VhdxMetadataTblEntry MetadataTblEntry;
	1429
	1430	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offMetadataTblEntry,
[44233]	1431	&MetadataTblEntry, sizeof(MetadataTblEntry));
[41315]	1432	if (RT_FAILURE(rc))
	1433	{
	1434	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
	1435	"VHDX: Reading metadata table entry from image \'%s\' failed",
	1436	pImage->pszFilename);
	1437	break;
	1438	}
	1439
	1440	vhdxConvMetadataTblEntryEndianess(VHDXECONV_F2H, &MetadataTblEntry, &MetadataTblEntry);
	1441
	1442	/* Check whether the flags match the expectations. */
	1443	for (unsigned idxProp = 0; idxProp < RT_ELEMENTS(s_aVhdxMetadataItemProps); idxProp++)
	1444	{
	1445	if (!RTUuidCompareStr(&MetadataTblEntry.UuidItem,
	1446	s_aVhdxMetadataItemProps[idxProp].pszItemUuid))
	1447	{
[46029]	1448	/*
	1449	* Check for specification violations and bail out, except
	1450	* for the required flag of the physical sector size metadata item.
	1451	* Early images had the required flag not set opposed to the specification.
	1452	* We don't want to brerak those images.
	1453	*/
[41315]	1454	if ( !!(MetadataTblEntry.u32Flags & VHDX_METADATA_TBL_ENTRY_FLAGS_IS_USER)
	1455	!= s_aVhdxMetadataItemProps[idxProp].fIsUser)
	1456	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1457	"VHDX: User flag of metadata item does not meet expectations \'%s\'",
	1458	pImage->pszFilename);
	1459	else if ( !!(MetadataTblEntry.u32Flags & VHDX_METADATA_TBL_ENTRY_FLAGS_IS_VDISK)
	1460	!= s_aVhdxMetadataItemProps[idxProp].fIsVDisk)
	1461	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1462	"VHDX: Virtual disk flag of metadata item does not meet expectations \'%s\'",
	1463	pImage->pszFilename);
[46029]	1464	else if ( !!(MetadataTblEntry.u32Flags & VHDX_METADATA_TBL_ENTRY_FLAGS_IS_REQUIRED)
	1465	!= s_aVhdxMetadataItemProps[idxProp].fIsRequired
	1466	&& (s_aVhdxMetadataItemProps[idxProp].enmMetadataItem != VHDXMETADATAITEM_PHYSICAL_SECTOR_SIZE))
[41315]	1467	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1468	"VHDX: Required flag of metadata item does not meet expectations \'%s\'",
	1469	pImage->pszFilename);
	1470	else
	1471	enmMetadataItem = s_aVhdxMetadataItemProps[idxProp].enmMetadataItem;
	1472
	1473	break;
	1474	}
	1475	}
	1476
	1477	if (RT_FAILURE(rc))
	1478	break;
	1479
	1480	offMetadataItem = offRegion + MetadataTblEntry.u32Offset;
	1481
	1482	switch (enmMetadataItem)
	1483	{
	1484	case VHDXMETADATAITEM_FILE_PARAMS:
	1485	{
[41345]	1486	rc = vhdxLoadFileParametersMetadata(pImage, offMetadataItem,
	1487	MetadataTblEntry.u32Length);
[41315]	1488	break;
	1489	}
	1490	case VHDXMETADATAITEM_VDISK_SIZE:
	1491	{
[41345]	1492	rc = vhdxLoadVDiskSizeMetadata(pImage, offMetadataItem,
	1493	MetadataTblEntry.u32Length);
[41315]	1494	break;
	1495	}
	1496	case VHDXMETADATAITEM_PAGE83_DATA:
	1497	{
	1498	/*
	1499	* Nothing to do here for now (marked as required but
	1500	* there is no API to pass this information to the caller)
	1501	* so far.
	1502	*/
	1503	break;
	1504	}
	1505	case VHDXMETADATAITEM_LOGICAL_SECTOR_SIZE:
	1506	{
[41345]	1507	rc = vhdxLoadVDiskLogSectorSizeMetadata(pImage, offMetadataItem,
	1508	MetadataTblEntry.u32Length);
[41315]	1509	break;
	1510	}
	1511	case VHDXMETADATAITEM_PHYSICAL_SECTOR_SIZE:
	1512	{
	1513	/*
	1514	* Nothing to do here for now (marked as required but
	1515	* there is no API to pass this information to the caller)
	1516	* so far.
	1517	*/
	1518	break;
	1519	}
	1520	case VHDXMETADATAITEM_PARENT_LOCATOR:
	1521	{
[41345]	1522	rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
	1523	"VHDX: Image \'%s\' is a differencing image which is not supported yet",
	1524	pImage->pszFilename);
[41315]	1525	break;
	1526	}
	1527	case VHDXMETADATAITEM_UNKNOWN:
	1528	default:
	1529	if (MetadataTblEntry.u32Flags & VHDX_METADATA_TBL_ENTRY_FLAGS_IS_REQUIRED)
	1530	rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
	1531	"VHDX: Unsupported but required metadata item in image \'%s\'",
	1532	pImage->pszFilename);
	1533	}
	1534
	1535	if (RT_FAILURE(rc))
	1536	break;
	1537
	1538	offMetadataTblEntry += sizeof(MetadataTblEntry);
	1539	}
	1540	}
	1541	}
	1542	else
	1543	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
	1544	"VHDX: Reading the metadata table header for image \'%s\' failed",
	1545	pImage->pszFilename);
	1546
	1547	LogFlowFunc(("returns rc=%Rrc\n", rc));
	1548	return rc;
	1549	}
	1550
	1551	/**
	1552	* Loads the region table and the associated regions.
	1553	*
	1554	* @returns VBox status code.
	1555	* @param pImage Image instance data.
	1556	*/
	1557	static int vhdxLoadRegionTable(PVHDXIMAGE pImage)
	1558	{
	1559	uint8_t *pbRegionTbl = NULL;
	1560	int rc = VINF_SUCCESS;
	1561
	1562	LogFlowFunc(("pImage=%#p\n", pImage));
	1563
	1564	/* Load the complete region table into memory. */
	1565	pbRegionTbl = (uint8_t *)RTMemTmpAlloc(VHDX_REGION_TBL_SIZE_MAX);
	1566	if (pbRegionTbl)
	1567	{
	1568	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, VHDX_REGION_TBL_HDR_OFFSET,
[44233]	1569	pbRegionTbl, VHDX_REGION_TBL_SIZE_MAX);
[41315]	1570	if (RT_SUCCESS(rc))
	1571	{
	1572	PVhdxRegionTblHdr pRegionTblHdr;
	1573	VhdxRegionTblHdr RegionTblHdr;
	1574	uint32_t u32ChkSum = 0;
	1575
	1576	/*
	1577	* Copy the region table header to a dedicated structure where we can
	1578	* convert it to host endianess.
	1579	*/
	1580	memcpy(&RegionTblHdr, pbRegionTbl, sizeof(RegionTblHdr));
	1581	vhdxConvRegionTblHdrEndianess(VHDXECONV_F2H, &RegionTblHdr, &RegionTblHdr);
	1582
	1583	/* Set checksum field to 0 during crc computation. */
	1584	pRegionTblHdr = (PVhdxRegionTblHdr)pbRegionTbl;
	1585	pRegionTblHdr->u32Checksum = 0;
	1586
	1587	/* Verify the region table integrity. */
[50526]	1588	u32ChkSum = RTCrc32C(pbRegionTbl, VHDX_REGION_TBL_SIZE_MAX);
[41315]	1589
	1590	if (RegionTblHdr.u32Signature != VHDX_REGION_TBL_HDR_SIGNATURE)
	1591	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1592	"VHDX: Invalid signature for region table header of image \'%s\'",
	1593	pImage->pszFilename);
	1594	else if (u32ChkSum != RegionTblHdr.u32Checksum)
	1595	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1596	"VHDX: CRC32 checksum mismatch for the region table of image \'%s\' (expected %#x got %#x)",
	1597	pImage->pszFilename, RegionTblHdr.u32Checksum, u32ChkSum);
	1598	else if (RegionTblHdr.u32EntryCount > VHDX_REGION_TBL_HDR_ENTRY_COUNT_MAX)
	1599	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1600	"VHDX: Invalid entry count field in the region table header of image \'%s\'",
	1601	pImage->pszFilename);
	1602
	1603	if (RT_SUCCESS(rc))
	1604	{
	1605	/* Parse the region table entries. */
	1606	PVhdxRegionTblEntry pRegTblEntry = (PVhdxRegionTblEntry)(pbRegionTbl + sizeof(VhdxRegionTblHdr));
[48861]	1607	VhdxRegionTblEntry RegTblEntryBat; /* BAT region table entry. */
[41345]	1608	bool fBatRegPresent = false;
[48861]	1609	RT_ZERO(RegTblEntryBat); /* Maybe uninitialized, gcc. */
[41315]	1610
	1611	for (unsigned i = 0; i < RegionTblHdr.u32EntryCount; i++)
	1612	{
	1613	vhdxConvRegionTblEntryEndianess(VHDXECONV_F2H, pRegTblEntry, pRegTblEntry);
	1614
	1615	/* Check the uuid for known regions. */
	1616	if (!RTUuidCompareStr(&pRegTblEntry->UuidObject, VHDX_REGION_TBL_ENTRY_UUID_BAT))
	1617	{
[41345]	1618	/*
	1619	* Save the BAT region and process it later.
	1620	* It may come before the metadata region but needs the block size.
	1621	*/
[41315]	1622	if (pRegTblEntry->u32Flags & VHDX_REGION_TBL_ENTRY_FLAGS_IS_REQUIRED)
[41345]	1623	{
	1624	fBatRegPresent = true;
[41350]	1625	RegTblEntryBat.u32Length = pRegTblEntry->u32Length;
	1626	RegTblEntryBat.u64FileOffset = pRegTblEntry->u64FileOffset;
[41345]	1627	}
[41315]	1628	else
	1629	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1630	"VHDX: BAT region not marked as required in image \'%s\'",
	1631	pImage->pszFilename);
	1632	}
	1633	else if (!RTUuidCompareStr(&pRegTblEntry->UuidObject, VHDX_REGION_TBL_ENTRY_UUID_METADATA))
	1634	{
	1635	if (pRegTblEntry->u32Flags & VHDX_REGION_TBL_ENTRY_FLAGS_IS_REQUIRED)
	1636	rc = vhdxLoadMetadataRegion(pImage, pRegTblEntry->u64FileOffset, pRegTblEntry->u32Length);
	1637	else
	1638	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1639	"VHDX: Metadata region not marked as required in image \'%s\'",
	1640	pImage->pszFilename);
	1641	}
	1642	else if (pRegTblEntry->u32Flags & VHDX_REGION_TBL_ENTRY_FLAGS_IS_REQUIRED)
	1643	{
	1644	/* The region is not known but marked as required, fail to load the image. */
	1645	rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
	1646	"VHDX: Unknown required region in image \'%s\'",
	1647	pImage->pszFilename);
	1648	}
	1649
	1650	if (RT_FAILURE(rc))
	1651	break;
	1652
	1653	pRegTblEntry++;
	1654	}
[41345]	1655
	1656	if (fBatRegPresent)
	1657	rc = vhdxLoadBatRegion(pImage, RegTblEntryBat.u64FileOffset, RegTblEntryBat.u32Length);
	1658	else
	1659	rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
	1660	"VHDX: BAT region in image \'%s\' is missing",
	1661	pImage->pszFilename);
[41315]	1662	}
	1663	}
	1664	else
	1665	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
	1666	"VHDX: Reading the region table for image \'%s\' failed",
	1667	pImage->pszFilename);
	1668	}
	1669	else
	1670	rc = vdIfError(pImage->pIfError, VERR_NO_MEMORY, RT_SRC_POS,
	1671	"VHDX: Out of memory allocating memory for the region table of image \'%s\'",
	1672	pImage->pszFilename);
	1673
	1674	if (pbRegionTbl)
	1675	RTMemTmpFree(pbRegionTbl);
	1676
	1677	LogFlowFunc(("returns rc=%Rrc\n", rc));
	1678	return rc;
	1679	}
	1680
	1681	/**
	1682	* Internal: Open an image, constructing all necessary data structures.
	1683	*/
	1684	static int vhdxOpenImage(PVHDXIMAGE pImage, unsigned uOpenFlags)
	1685	{
	1686	uint64_t cbFile = 0;
	1687	VhdxFileIdentifier FileIdentifier;
	1688	int rc = VINF_SUCCESS;
	1689
	1690	LogFlowFunc(("pImage=%#p uOpenFlags=%#x\n", pImage, uOpenFlags));
	1691	pImage->uOpenFlags = uOpenFlags;
	1692
	1693	pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk);
	1694	pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage);
	1695	AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER);
	1696
	1697	/* Refuse write access, it is not implemented so far. */
	1698	if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY))
	1699	return VERR_NOT_SUPPORTED;
	1700
	1701	/*
	1702	* Open the image.
	1703	*/
	1704	rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename,
	1705	VDOpenFlagsToFileOpenFlags(uOpenFlags,
	1706	false /* fCreate */),
	1707	&pImage->pStorage);
	1708
	1709	/* Do NOT signal an appropriate error here, as the VD layer has the
	1710	* choice of retrying the open if it failed. */
	1711	if (RT_SUCCESS(rc))
	1712	rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &cbFile);
	1713
	1714	if (RT_SUCCESS(rc))
	1715	{
	1716	if (cbFile > sizeof(FileIdentifier))
	1717	{
	1718	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, VHDX_FILE_IDENTIFIER_OFFSET,
[44233]	1719	&FileIdentifier, sizeof(FileIdentifier));
[41315]	1720	if (RT_SUCCESS(rc))
	1721	{
	1722	vhdxConvFileIdentifierEndianess(VHDXECONV_F2H, &FileIdentifier,
	1723	&FileIdentifier);
	1724	if (FileIdentifier.u64Signature != VHDX_FILE_IDENTIFIER_SIGNATURE)
	1725	rc = VERR_VD_GEN_INVALID_HEADER;
	1726	else
	1727	rc = vhdxFindAndLoadCurrentHeader(pImage);
	1728
	1729	/* Load the region table. */
	1730	if (RT_SUCCESS(rc))
	1731	rc = vhdxLoadRegionTable(pImage);
	1732	}
	1733	}
	1734	else
	1735	rc = VERR_VD_GEN_INVALID_HEADER;
	1736	}
	1737
[66486]	1738	if (RT_SUCCESS(rc))
	1739	{
	1740	PVDREGIONDESC pRegion = &pImage->RegionList.aRegions[0];
	1741	pImage->RegionList.fFlags = 0;
	1742	pImage->RegionList.cRegions = 1;
	1743
	1744	pRegion->offRegion = 0; /* Disk start. */
	1745	pRegion->cbBlock = pImage->cbLogicalSector;
	1746	pRegion->enmDataForm = VDREGIONDATAFORM_RAW;
	1747	pRegion->enmMetadataForm = VDREGIONMETADATAFORM_NONE;
	1748	pRegion->cbData = pImage->cbLogicalSector;
	1749	pRegion->cbMetadata = 0;
	1750	pRegion->cRegionBlocksOrBytes = pImage->cbSize;
	1751	}
	1752	else
[41315]	1753	vhdxFreeImage(pImage, false);
	1754
	1755	LogFlowFunc(("returns rc=%Rrc\n", rc));
	1756	return rc;
	1757	}
	1758
	1759
[63802]	1760	/** @copydoc VDIMAGEBACKEND::pfnProbe */
	1761	static DECLCALLBACK(int) vhdxProbe(const char *pszFilename, PVDINTERFACE pVDIfsDisk,
[79965]	1762	PVDINTERFACE pVDIfsImage, VDTYPE enmDesiredType, VDTYPE *penmType)
[41315]	1763	{
[79965]	1764	RT_NOREF(pVDIfsDisk, enmDesiredType);
[41315]	1765	LogFlowFunc(("pszFilename=\"%s\" pVDIfsDisk=%#p pVDIfsImage=%#p\n", pszFilename, pVDIfsDisk, pVDIfsImage));
	1766	PVDIOSTORAGE pStorage = NULL;
	1767	uint64_t cbFile;
	1768	int rc = VINF_SUCCESS;
	1769	VhdxFileIdentifier FileIdentifier;
	1770
	1771	PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage);
	1772	AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER);
	1773
[90802]	1774	if ( !RT_VALID_PTR(pszFilename)
[41315]	1775	\|\| !*pszFilename)
	1776	rc = VERR_INVALID_PARAMETER;
	1777	else
	1778	{
	1779	/*
	1780	* Open the file and read the file identifier.
	1781	*/
	1782	rc = vdIfIoIntFileOpen(pIfIo, pszFilename,
	1783	VDOpenFlagsToFileOpenFlags(VD_OPEN_FLAGS_READONLY,
	1784	false /* fCreate */),
	1785	&pStorage);
	1786	if (RT_SUCCESS(rc))
[62743]	1787	{
[41315]	1788	rc = vdIfIoIntFileGetSize(pIfIo, pStorage, &cbFile);
[62743]	1789	if (RT_SUCCESS(rc))
[41315]	1790	{
[62743]	1791	if (cbFile > sizeof(FileIdentifier))
[41315]	1792	{
[62743]	1793	rc = vdIfIoIntFileReadSync(pIfIo, pStorage, VHDX_FILE_IDENTIFIER_OFFSET,
	1794	&FileIdentifier, sizeof(FileIdentifier));
	1795	if (RT_SUCCESS(rc))
	1796	{
	1797	vhdxConvFileIdentifierEndianess(VHDXECONV_F2H, &FileIdentifier,
	1798	&FileIdentifier);
	1799	if (FileIdentifier.u64Signature != VHDX_FILE_IDENTIFIER_SIGNATURE)
	1800	rc = VERR_VD_GEN_INVALID_HEADER;
	1801	else
	1802	*penmType = VDTYPE_HDD;
	1803	}
[41315]	1804	}
[62743]	1805	else
	1806	rc = VERR_VD_GEN_INVALID_HEADER;
[41315]	1807	}
	1808	}
	1809
	1810	if (pStorage)
	1811	vdIfIoIntFileClose(pIfIo, pStorage);
	1812	}
	1813
	1814	LogFlowFunc(("returns %Rrc\n", rc));
	1815	return rc;
	1816	}
	1817
[63785]	1818	/** @copydoc VDIMAGEBACKEND::pfnOpen */
[57388]	1819	static DECLCALLBACK(int) vhdxOpen(const char *pszFilename, unsigned uOpenFlags,
	1820	PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
	1821	VDTYPE enmType, void **ppBackendData)
[41315]	1822	{
[54430]	1823	LogFlowFunc(("pszFilename=\"%s\" uOpenFlags=%#x pVDIfsDisk=%#p pVDIfsImage=%#p enmType=%u ppBackendData=%#p\n", pszFilename, uOpenFlags, pVDIfsDisk, pVDIfsImage, enmType, ppBackendData));
[41315]	1824	int rc;
	1825	PVHDXIMAGE pImage;
	1826
[54430]	1827	NOREF(enmType); /*< @todo r=klaus make use of the type info. /
	1828
[41315]	1829	/* Check open flags. All valid flags are supported. */
	1830	if ( uOpenFlags & ~VD_OPEN_FLAGS_MASK
[90802]	1831	\|\| !RT_VALID_PTR(pszFilename)
[41315]	1832	\|\| !*pszFilename)
	1833	rc = VERR_INVALID_PARAMETER;
	1834	else
	1835	{
[66486]	1836	pImage = (PVHDXIMAGE)RTMemAllocZ(RT_UOFFSETOF(VHDXIMAGE, RegionList.aRegions[1]));
[41315]	1837	if (!pImage)
	1838	rc = VERR_NO_MEMORY;
	1839	else
	1840	{
	1841	pImage->pszFilename = pszFilename;
	1842	pImage->pStorage = NULL;
	1843	pImage->pVDIfsDisk = pVDIfsDisk;
	1844	pImage->pVDIfsImage = pVDIfsImage;
	1845
	1846	rc = vhdxOpenImage(pImage, uOpenFlags);
	1847	if (RT_SUCCESS(rc))
	1848	*ppBackendData = pImage;
	1849	else
	1850	RTMemFree(pImage);
	1851	}
	1852	}
	1853
	1854	LogFlowFunc(("returns %Rrc (pBackendData=%#p)\n", rc, *ppBackendData));
	1855	return rc;
	1856	}
	1857
[63785]	1858	/** @interface_method_impl{VDIMAGEBACKEND,pfnCreate} */
[54430]	1859	static DECLCALLBACK(int) vhdxCreate(const char *pszFilename, uint64_t cbSize,
	1860	unsigned uImageFlags, const char *pszComment,
	1861	PCVDGEOMETRY pPCHSGeometry, PCVDGEOMETRY pLCHSGeometry,
	1862	PCRTUUID pUuid, unsigned uOpenFlags,
	1863	unsigned uPercentStart, unsigned uPercentSpan,
	1864	PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
	1865	PVDINTERFACE pVDIfsOperation, VDTYPE enmType,
	1866	void **ppBackendData)
	1867	{
[62743]	1868	RT_NOREF8(pszFilename, cbSize, uImageFlags, pszComment, pPCHSGeometry, pLCHSGeometry, pUuid, uOpenFlags);
	1869	RT_NOREF7(uPercentStart, uPercentSpan, pVDIfsDisk, pVDIfsImage, pVDIfsOperation, enmType, ppBackendData);
[54430]	1870	LogFlowFunc(("pszFilename=\"%s\" cbSize=%llu uImageFlags=%#x pszComment=\"%s\" pPCHSGeometry=%#p pLCHSGeometry=%#p Uuid=%RTuuid uOpenFlags=%#x uPercentStart=%u uPercentSpan=%u pVDIfsDisk=%#p pVDIfsImage=%#p pVDIfsOperation=%#p enmType=%u ppBackendData=%#p",
	1871	pszFilename, cbSize, uImageFlags, pszComment, pPCHSGeometry, pLCHSGeometry, pUuid, uOpenFlags, uPercentStart, uPercentSpan, pVDIfsDisk, pVDIfsImage, pVDIfsOperation, enmType, ppBackendData));
	1872	int rc = VERR_NOT_SUPPORTED;
	1873
	1874	LogFlowFunc(("returns %Rrc\n", rc));
	1875	return rc;
	1876	}
	1877
[63785]	1878	/** @copydoc VDIMAGEBACKEND::pfnRename */
[57388]	1879	static DECLCALLBACK(int) vhdxRename(void pBackendData, const char pszFilename)
[41315]	1880	{
	1881	LogFlowFunc(("pBackendData=%#p pszFilename=%#p\n", pBackendData, pszFilename));
	1882	int rc = VINF_SUCCESS;
	1883	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	1884
	1885	/* Check arguments. */
	1886	if ( !pImage
	1887	\|\| !pszFilename
	1888	\|\| !*pszFilename)
	1889	rc = VERR_INVALID_PARAMETER;
	1890	else
	1891	{
	1892	/* Close the image. */
	1893	rc = vhdxFreeImage(pImage, false);
	1894	if (RT_SUCCESS(rc))
	1895	{
	1896	/* Rename the file. */
	1897	rc = vdIfIoIntFileMove(pImage->pIfIo, pImage->pszFilename, pszFilename, 0);
	1898	if (RT_FAILURE(rc))
	1899	{
	1900	/* The move failed, try to reopen the original image. */
	1901	int rc2 = vhdxOpenImage(pImage, pImage->uOpenFlags);
	1902	if (RT_FAILURE(rc2))
	1903	rc = rc2;
	1904	}
	1905	else
	1906	{
	1907	/* Update pImage with the new information. */
	1908	pImage->pszFilename = pszFilename;
	1909
	1910	/* Open the old image with new name. */
	1911	rc = vhdxOpenImage(pImage, pImage->uOpenFlags);
	1912	}
	1913	}
	1914	}
	1915
	1916	LogFlowFunc(("returns %Rrc\n", rc));
	1917	return rc;
	1918	}
	1919
[63785]	1920	/** @copydoc VDIMAGEBACKEND::pfnClose */
[57388]	1921	static DECLCALLBACK(int) vhdxClose(void *pBackendData, bool fDelete)
[41315]	1922	{
	1923	LogFlowFunc(("pBackendData=%#p fDelete=%d\n", pBackendData, fDelete));
	1924	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	1925	int rc;
	1926
	1927	rc = vhdxFreeImage(pImage, fDelete);
	1928	RTMemFree(pImage);
	1929
	1930	LogFlowFunc(("returns %Rrc\n", rc));
	1931	return rc;
	1932	}
	1933
[63785]	1934	/** @copydoc VDIMAGEBACKEND::pfnRead */
[57388]	1935	static DECLCALLBACK(int) vhdxRead(void *pBackendData, uint64_t uOffset, size_t cbToRead,
	1936	PVDIOCTX pIoCtx, size_t *pcbActuallyRead)
[41315]	1937	{
[44252]	1938	LogFlowFunc(("pBackendData=%#p uOffset=%llu pIoCtx=%#p cbToRead=%zu pcbActuallyRead=%#p\n",
	1939	pBackendData, uOffset, pIoCtx, cbToRead, pcbActuallyRead));
[41315]	1940	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
[41350]	1941	int rc = VINF_SUCCESS;
[41315]	1942
	1943	AssertPtr(pImage);
	1944	Assert(uOffset % 512 == 0);
	1945	Assert(cbToRead % 512 == 0);
	1946
	1947	if ( uOffset + cbToRead > pImage->cbSize
	1948	\|\| cbToRead == 0)
	1949	rc = VERR_INVALID_PARAMETER;
	1950	else
	1951	{
[48851]	1952	uint32_t idxBat = (uint32_t)(uOffset / pImage->cbBlock); Assert(idxBat == uOffset / pImage->cbBlock);
[41345]	1953	uint32_t offRead = uOffset % pImage->cbBlock;
	1954	uint64_t uBatEntry;
	1955
	1956	idxBat += idxBat / pImage->uChunkRatio; /* Add interleaving sector bitmap entries. */
	1957	uBatEntry = pImage->paBat[idxBat].u64BatEntry;
	1958
	1959	cbToRead = RT_MIN(cbToRead, pImage->cbBlock - offRead);
	1960
	1961	switch (VHDX_BAT_ENTRY_GET_STATE(uBatEntry))
	1962	{
	1963	case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_NOT_PRESENT:
	1964	case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_UNDEFINED:
	1965	case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_ZERO:
	1966	case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_UNMAPPED:
	1967	{
[44252]	1968	vdIfIoIntIoCtxSet(pImage->pIfIo, pIoCtx, 0, cbToRead);
[41345]	1969	break;
	1970	}
	1971	case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_FULLY_PRESENT:
	1972	{
	1973	uint64_t offFile = VHDX_BAT_ENTRY_GET_FILE_OFFSET(uBatEntry) + offRead;
[44252]	1974	rc = vdIfIoIntFileReadUser(pImage->pIfIo, pImage->pStorage, offFile,
	1975	pIoCtx, cbToRead);
[41345]	1976	break;
	1977	}
	1978	case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_PARTIALLY_PRESENT:
	1979	default:
	1980	rc = VERR_INVALID_PARAMETER;
	1981	break;
	1982	}
	1983
[41315]	1984	if (pcbActuallyRead)
	1985	*pcbActuallyRead = cbToRead;
	1986	}
	1987
	1988	LogFlowFunc(("returns %Rrc\n", rc));
	1989	return rc;
	1990	}
	1991
[63785]	1992	/** @copydoc VDIMAGEBACKEND::pfnWrite */
[57388]	1993	static DECLCALLBACK(int) vhdxWrite(void *pBackendData, uint64_t uOffset, size_t cbToWrite,
	1994	PVDIOCTX pIoCtx, size_t pcbWriteProcess, size_t pcbPreRead,
	1995	size_t *pcbPostRead, unsigned fWrite)
[41315]	1996	{
[62743]	1997	RT_NOREF5(pIoCtx, pcbWriteProcess, pcbPreRead, pcbPostRead, fWrite);
[44252]	1998	LogFlowFunc(("pBackendData=%#p uOffset=%llu pIoCtx=%#p cbToWrite=%zu pcbWriteProcess=%#p pcbPreRead=%#p pcbPostRead=%#p\n",
	1999	pBackendData, uOffset, pIoCtx, cbToWrite, pcbWriteProcess, pcbPreRead, pcbPostRead));
[41315]	2000	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2001	int rc;
	2002
	2003	AssertPtr(pImage);
	2004	Assert(uOffset % 512 == 0);
	2005	Assert(cbToWrite % 512 == 0);
	2006
	2007	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
	2008	rc = VERR_VD_IMAGE_READ_ONLY;
	2009	else if ( uOffset + cbToWrite > pImage->cbSize
	2010	\|\| cbToWrite == 0)
	2011	rc = VERR_INVALID_PARAMETER;
	2012	else
	2013	rc = VERR_NOT_SUPPORTED;
	2014
	2015	LogFlowFunc(("returns %Rrc\n", rc));
	2016	return rc;
	2017	}
	2018
[63785]	2019	/** @copydoc VDIMAGEBACKEND::pfnFlush */
[57388]	2020	static DECLCALLBACK(int) vhdxFlush(void *pBackendData, PVDIOCTX pIoCtx)
[41315]	2021	{
[62743]	2022	RT_NOREF1(pIoCtx);
[44252]	2023	LogFlowFunc(("pBackendData=%#p pIoCtx=%#p\n", pBackendData, pIoCtx));
[41315]	2024	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2025	int rc;
	2026
	2027	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
	2028	rc = VERR_VD_IMAGE_READ_ONLY;
	2029	else
	2030	rc = VERR_NOT_SUPPORTED;
	2031
	2032	LogFlowFunc(("returns %Rrc\n", rc));
	2033	return rc;
	2034	}
	2035
[63785]	2036	/** @copydoc VDIMAGEBACKEND::pfnGetVersion */
[57388]	2037	static DECLCALLBACK(unsigned) vhdxGetVersion(void *pBackendData)
[41315]	2038	{
	2039	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
	2040	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2041
	2042	AssertPtr(pImage);
	2043
	2044	if (pImage)
	2045	return pImage->uVersion;
	2046	else
	2047	return 0;
	2048	}
	2049
[63785]	2050	/** @copydoc VDIMAGEBACKEND::pfnGetFileSize */
[57388]	2051	static DECLCALLBACK(uint64_t) vhdxGetFileSize(void *pBackendData)
[41315]	2052	{
	2053	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
	2054	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2055	uint64_t cb = 0;
	2056
	2057	AssertPtr(pImage);
	2058
	2059	if (pImage)
	2060	{
	2061	uint64_t cbFile;
	2062	if (pImage->pStorage)
	2063	{
	2064	int rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &cbFile);
	2065	if (RT_SUCCESS(rc))
	2066	cb = cbFile;
	2067	}
	2068	}
	2069
	2070	LogFlowFunc(("returns %lld\n", cb));
	2071	return cb;
	2072	}
	2073
[63785]	2074	/** @copydoc VDIMAGEBACKEND::pfnGetPCHSGeometry */
[57388]	2075	static DECLCALLBACK(int) vhdxGetPCHSGeometry(void *pBackendData,
	2076	PVDGEOMETRY pPCHSGeometry)
[41315]	2077	{
	2078	LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p\n", pBackendData, pPCHSGeometry));
	2079	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2080	int rc;
	2081
	2082	AssertPtr(pImage);
	2083
	2084	if (pImage)
	2085	{
	2086	if (pImage->PCHSGeometry.cCylinders)
	2087	{
	2088	*pPCHSGeometry = pImage->PCHSGeometry;
	2089	rc = VINF_SUCCESS;
	2090	}
	2091	else
	2092	rc = VERR_VD_GEOMETRY_NOT_SET;
	2093	}
	2094	else
	2095	rc = VERR_VD_NOT_OPENED;
	2096
	2097	LogFlowFunc(("returns %Rrc (PCHS=%u/%u/%u)\n", rc, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
	2098	return rc;
	2099	}
	2100
[63785]	2101	/** @copydoc VDIMAGEBACKEND::pfnSetPCHSGeometry */
[57388]	2102	static DECLCALLBACK(int) vhdxSetPCHSGeometry(void *pBackendData,
	2103	PCVDGEOMETRY pPCHSGeometry)
[41315]	2104	{
	2105	LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p PCHS=%u/%u/%u\n", pBackendData, pPCHSGeometry, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
	2106	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2107	int rc = VINF_SUCCESS;
	2108
	2109	AssertPtr(pImage);
	2110
	2111	if (pImage)
	2112	{
	2113	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
	2114	rc = VERR_VD_IMAGE_READ_ONLY;
	2115	else
	2116	pImage->PCHSGeometry = *pPCHSGeometry;
	2117	}
	2118	else
	2119	rc = VERR_VD_NOT_OPENED;
	2120
	2121	LogFlowFunc(("returns %Rrc\n", rc));
	2122	return rc;
	2123	}
	2124
[63785]	2125	/** @copydoc VDIMAGEBACKEND::pfnGetLCHSGeometry */
[57388]	2126	static DECLCALLBACK(int) vhdxGetLCHSGeometry(void *pBackendData,
	2127	PVDGEOMETRY pLCHSGeometry)
[41315]	2128	{
	2129	LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p\n", pBackendData, pLCHSGeometry));
	2130	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2131	int rc = VINF_SUCCESS;
	2132
	2133	AssertPtr(pImage);
	2134
	2135	if (pImage)
	2136	{
	2137	if (pImage->LCHSGeometry.cCylinders)
	2138	*pLCHSGeometry = pImage->LCHSGeometry;
	2139	else
	2140	rc = VERR_VD_GEOMETRY_NOT_SET;
	2141	}
	2142	else
	2143	rc = VERR_VD_NOT_OPENED;
	2144
	2145	LogFlowFunc(("returns %Rrc (LCHS=%u/%u/%u)\n", rc, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
	2146	return rc;
	2147	}
	2148
[63785]	2149	/** @copydoc VDIMAGEBACKEND::pfnSetLCHSGeometry */
[57388]	2150	static DECLCALLBACK(int) vhdxSetLCHSGeometry(void *pBackendData,
	2151	PCVDGEOMETRY pLCHSGeometry)
[41315]	2152	{
	2153	LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p LCHS=%u/%u/%u\n", pBackendData, pLCHSGeometry, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
	2154	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2155	int rc = VINF_SUCCESS;
	2156
	2157	AssertPtr(pImage);
	2158
	2159	if (pImage)
	2160	{
	2161	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
	2162	rc = VERR_VD_IMAGE_READ_ONLY;
	2163	else
	2164	pImage->LCHSGeometry = *pLCHSGeometry;
	2165	}
	2166	else
	2167	rc = VERR_VD_NOT_OPENED;
	2168
	2169	LogFlowFunc(("returns %Rrc\n", rc));
	2170	return rc;
	2171	}
	2172
[66486]	2173	/** @copydoc VDIMAGEBACKEND::pfnQueryRegions */
	2174	static DECLCALLBACK(int) vhdxQueryRegions(void pBackendData, PCVDREGIONLIST ppRegionList)
	2175	{
	2176	LogFlowFunc(("pBackendData=%#p ppRegionList=%#p\n", pBackendData, ppRegionList));
	2177	PVHDXIMAGE pThis = (PVHDXIMAGE)pBackendData;
	2178
	2179	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
	2180
	2181	*ppRegionList = &pThis->RegionList;
	2182	LogFlowFunc(("returns %Rrc\n", VINF_SUCCESS));
	2183	return VINF_SUCCESS;
	2184	}
	2185
	2186	/** @copydoc VDIMAGEBACKEND::pfnRegionListRelease */
	2187	static DECLCALLBACK(void) vhdxRegionListRelease(void *pBackendData, PCVDREGIONLIST pRegionList)
	2188	{
	2189	RT_NOREF1(pRegionList);
	2190	LogFlowFunc(("pBackendData=%#p pRegionList=%#p\n", pBackendData, pRegionList));
	2191	PVHDXIMAGE pThis = (PVHDXIMAGE)pBackendData;
	2192	AssertPtr(pThis); RT_NOREF(pThis);
	2193
	2194	/* Nothing to do here. */
	2195	}
	2196
[63785]	2197	/** @copydoc VDIMAGEBACKEND::pfnGetImageFlags */
[57388]	2198	static DECLCALLBACK(unsigned) vhdxGetImageFlags(void *pBackendData)
[41315]	2199	{
	2200	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
	2201	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2202	unsigned uImageFlags;
	2203
	2204	AssertPtr(pImage);
	2205
	2206	if (pImage)
	2207	uImageFlags = pImage->uImageFlags;
	2208	else
	2209	uImageFlags = 0;
	2210
	2211	LogFlowFunc(("returns %#x\n", uImageFlags));
	2212	return uImageFlags;
	2213	}
	2214
[63785]	2215	/** @copydoc VDIMAGEBACKEND::pfnGetOpenFlags */
[57388]	2216	static DECLCALLBACK(unsigned) vhdxGetOpenFlags(void *pBackendData)
[41315]	2217	{
	2218	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
	2219	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2220	unsigned uOpenFlags;
	2221
	2222	AssertPtr(pImage);
	2223
	2224	if (pImage)
	2225	uOpenFlags = pImage->uOpenFlags;
	2226	else
	2227	uOpenFlags = 0;
	2228
	2229	LogFlowFunc(("returns %#x\n", uOpenFlags));
	2230	return uOpenFlags;
	2231	}
	2232
[63785]	2233	/** @copydoc VDIMAGEBACKEND::pfnSetOpenFlags */
[57388]	2234	static DECLCALLBACK(int) vhdxSetOpenFlags(void *pBackendData, unsigned uOpenFlags)
[41315]	2235	{
	2236	LogFlowFunc(("pBackendData=%#p\n uOpenFlags=%#x", pBackendData, uOpenFlags));
	2237	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2238	int rc = VINF_SUCCESS;
	2239
	2240	/* Image must be opened and the new flags must be valid. */
[44232]	2241	if (!pImage \|\| (uOpenFlags & ~(VD_OPEN_FLAGS_READONLY \| VD_OPEN_FLAGS_INFO \| VD_OPEN_FLAGS_SKIP_CONSISTENCY_CHECKS)))
[41315]	2242	rc = VERR_INVALID_PARAMETER;
	2243	else
	2244	{
	2245	/* Implement this operation via reopening the image. */
	2246	rc = vhdxFreeImage(pImage, false);
	2247	if (RT_SUCCESS(rc))
	2248	rc = vhdxOpenImage(pImage, uOpenFlags);
	2249	}
	2250
	2251	LogFlowFunc(("returns %Rrc\n", rc));
	2252	return rc;
	2253	}
	2254
[63785]	2255	/** @copydoc VDIMAGEBACKEND::pfnGetComment */
[66494]	2256	VD_BACKEND_CALLBACK_GET_COMMENT_DEF_NOT_SUPPORTED(vhdxGetComment);
[41315]	2257
[63785]	2258	/** @copydoc VDIMAGEBACKEND::pfnSetComment */
[66494]	2259	VD_BACKEND_CALLBACK_SET_COMMENT_DEF_NOT_SUPPORTED(vhdxSetComment, PVHDXIMAGE);
[41315]	2260
[63785]	2261	/** @copydoc VDIMAGEBACKEND::pfnGetUuid */
[66494]	2262	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(vhdxGetUuid);
[41315]	2263
[63785]	2264	/** @copydoc VDIMAGEBACKEND::pfnSetUuid */
[66494]	2265	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(vhdxSetUuid, PVHDXIMAGE);
[41315]	2266
[63785]	2267	/** @copydoc VDIMAGEBACKEND::pfnGetModificationUuid */
[66494]	2268	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(vhdxGetModificationUuid);
[41315]	2269
[63785]	2270	/** @copydoc VDIMAGEBACKEND::pfnSetModificationUuid */
[66494]	2271	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(vhdxSetModificationUuid, PVHDXIMAGE);
[41315]	2272
[63785]	2273	/** @copydoc VDIMAGEBACKEND::pfnGetParentUuid */
[66494]	2274	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(vhdxGetParentUuid);
[41315]	2275
[63785]	2276	/** @copydoc VDIMAGEBACKEND::pfnSetParentUuid */
[66494]	2277	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(vhdxSetParentUuid, PVHDXIMAGE);
[41315]	2278
[63785]	2279	/** @copydoc VDIMAGEBACKEND::pfnGetParentModificationUuid */
[66494]	2280	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(vhdxGetParentModificationUuid);
[41315]	2281
[63785]	2282	/** @copydoc VDIMAGEBACKEND::pfnSetParentModificationUuid */
[66494]	2283	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(vhdxSetParentModificationUuid, PVHDXIMAGE);
[41315]	2284
[63785]	2285	/** @copydoc VDIMAGEBACKEND::pfnDump */
[57388]	2286	static DECLCALLBACK(void) vhdxDump(void *pBackendData)
[41315]	2287	{
	2288	PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
	2289
	2290	AssertPtr(pImage);
	2291	if (pImage)
	2292	{
[48851]	2293	vdIfErrorMessage(pImage->pIfError, "Header: Geometry PCHS=%u/%u/%u LCHS=%u/%u/%u cbSector=%u\n",
[41315]	2294	pImage->PCHSGeometry.cCylinders, pImage->PCHSGeometry.cHeads, pImage->PCHSGeometry.cSectors,
	2295	pImage->LCHSGeometry.cCylinders, pImage->LCHSGeometry.cHeads, pImage->LCHSGeometry.cSectors,
[41447]	2296	pImage->cbLogicalSector);
[41315]	2297	}
	2298	}
	2299
	2300
[63781]	2301	const VDIMAGEBACKEND g_VhdxBackend =
[41315]	2302	{
[63905]	2303	/* u32Version */
	2304	VD_IMGBACKEND_VERSION,
[41315]	2305	/* pszBackendName */
	2306	"VHDX",
	2307	/* uBackendCaps */
	2308	VD_CAP_FILE \| VD_CAP_VFS,
	2309	/* paFileExtensions */
	2310	s_aVhdxFileExtensions,
	2311	/* paConfigInfo */
	2312	NULL,
[63802]	2313	/* pfnProbe */
	2314	vhdxProbe,
[41315]	2315	/* pfnOpen */
	2316	vhdxOpen,
	2317	/* pfnCreate */
[54430]	2318	vhdxCreate,
[41315]	2319	/* pfnRename */
	2320	vhdxRename,
	2321	/* pfnClose */
	2322	vhdxClose,
	2323	/* pfnRead */
	2324	vhdxRead,
	2325	/* pfnWrite */
	2326	vhdxWrite,
	2327	/* pfnFlush */
	2328	vhdxFlush,
[44252]	2329	/* pfnDiscard */
	2330	NULL,
[41315]	2331	/* pfnGetVersion */
	2332	vhdxGetVersion,
	2333	/* pfnGetFileSize */
	2334	vhdxGetFileSize,
	2335	/* pfnGetPCHSGeometry */
	2336	vhdxGetPCHSGeometry,
	2337	/* pfnSetPCHSGeometry */
	2338	vhdxSetPCHSGeometry,
	2339	/* pfnGetLCHSGeometry */
	2340	vhdxGetLCHSGeometry,
	2341	/* pfnSetLCHSGeometry */
	2342	vhdxSetLCHSGeometry,
[66110]	2343	/* pfnQueryRegions */
[66486]	2344	vhdxQueryRegions,
[66110]	2345	/* pfnRegionListRelease */
[66486]	2346	vhdxRegionListRelease,
[41315]	2347	/* pfnGetImageFlags */
	2348	vhdxGetImageFlags,
	2349	/* pfnGetOpenFlags */
	2350	vhdxGetOpenFlags,
	2351	/* pfnSetOpenFlags */
	2352	vhdxSetOpenFlags,
	2353	/* pfnGetComment */
	2354	vhdxGetComment,
	2355	/* pfnSetComment */
	2356	vhdxSetComment,
	2357	/* pfnGetUuid */
	2358	vhdxGetUuid,
	2359	/* pfnSetUuid */
	2360	vhdxSetUuid,
	2361	/* pfnGetModificationUuid */
	2362	vhdxGetModificationUuid,
	2363	/* pfnSetModificationUuid */
	2364	vhdxSetModificationUuid,
	2365	/* pfnGetParentUuid */
	2366	vhdxGetParentUuid,
	2367	/* pfnSetParentUuid */
	2368	vhdxSetParentUuid,
	2369	/* pfnGetParentModificationUuid */
	2370	vhdxGetParentModificationUuid,
	2371	/* pfnSetParentModificationUuid */
	2372	vhdxSetParentModificationUuid,
	2373	/* pfnDump */
	2374	vhdxDump,
[58132]	2375	/* pfnGetTimestamp */
[41315]	2376	NULL,
[58132]	2377	/* pfnGetParentTimestamp */
[41315]	2378	NULL,
[58132]	2379	/* pfnSetParentTimestamp */
[41315]	2380	NULL,
	2381	/* pfnGetParentFilename */
	2382	NULL,
	2383	/* pfnSetParentFilename */
	2384	NULL,
	2385	/* pfnComposeLocation */
	2386	genericFileComposeLocation,
	2387	/* pfnComposeName */
	2388	genericFileComposeName,
	2389	/* pfnCompact */
	2390	NULL,
	2391	/* pfnResize */
	2392	NULL,
	2393	/* pfnRepair */
[50988]	2394	NULL,
	2395	/* pfnTraverseMetadata */
[63905]	2396	NULL,
	2397	/* u32VersionEnd */
	2398	VD_IMGBACKEND_VERSION
[41315]	2399	};

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source: vbox/trunk/src/VBox/Storage/VHDX.cpp@ 103523

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