VirtualBox

source: vbox/trunk/src/VBox/Storage/VHDX.cpp@ 42640

Last change on this file since 42640 was 41447, checked in by vboxsync, 13 years ago

Storage/VHDX: Work around data alignment issues by allocating memory for theheaders dynamically + fix uuid handling
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File size: 89.1 KB
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1/* $Id: VHDX.cpp 41447 2012-05-25 12:02:11Z vboxsync $ */
2/** @file
3 * VHDX - VHDX Disk image, Core Code.
4 */
5
6/*
7 * Copyright (C) 2012 Oracle Corporation
8 *
9 * This file is part of VirtualBox Open Source Edition (OSE), as
10 * available from http://www.virtualbox.org. This file is free software;
11 * you can redistribute it and/or modify it under the terms of the GNU
12 * General Public License (GPL) as published by the Free Software
13 * Foundation, in version 2 as it comes in the "COPYING" file of the
14 * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15 * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16 */
17
18/*******************************************************************************
19* Header Files *
20*******************************************************************************/
21#define LOG_GROUP LOG_GROUP_DEFAULT /** @todo: Log group */
22#include <VBox/vd-plugin.h>
23#include <VBox/err.h>
24
25#include <VBox/log.h>
26#include <iprt/asm.h>
27#include <iprt/assert.h>
28#include <iprt/alloc.h>
29#include <iprt/path.h>
30#include <iprt/uuid.h>
31#include <iprt/crc.h>
32
33/*******************************************************************************
34* On disk data structures *
35*******************************************************************************/
36
37/**
38 * VHDX file type identifier.
39 */
40#pragma pack(1)
41typedef struct VhdxFileIdentifier
42{
43 /** Signature. */
44 uint64_t u64Signature;
45 /** Creator ID - UTF-16 string (not neccessarily null terminated). */
46 uint16_t awszCreator[256];
47} VhdxFileIdentifier;
48#pragma pack()
49/** Pointer to an on disk VHDX file type identifier. */
50typedef VhdxFileIdentifier *PVhdxFileIdentifier;
51
52/** VHDX file type identifier signature ("vhdxfile"). */
53#define VHDX_FILE_IDENTIFIER_SIGNATURE UINT64_C(0x656c696678646876)
54/** Start offset of the VHDX file type identifier. */
55#define VHDX_FILE_IDENTIFIER_OFFSET UINT64_C(0)
56
57/**
58 * VHDX header.
59 */
60#pragma pack(1)
61typedef struct VhdxHeader
62{
63 /** Signature. */
64 uint32_t u32Signature;
65 /** Checksum. */
66 uint32_t u32Checksum;
67 /** Sequence number. */
68 uint64_t u64SequenceNumber;
69 /** File write UUID. */
70 RTUUID UuidFileWrite;
71 /** Data write UUID. */
72 RTUUID UuidDataWrite;
73 /** Log UUID. */
74 RTUUID UuidLog;
75 /** Version of the log format. */
76 uint16_t u16LogVersion;
77 /** VHDX format version.. */
78 uint16_t u16Version;
79 /** Length of the log region. */
80 uint32_t u32LogLength;
81 /** Start offset of the log offset in the file. */
82 uint64_t u64LogOffset;
83 /** Reserved bytes. */
84 uint8_t u8Reserved[4016];
85} VhdxHeader;
86#pragma pack()
87/** Pointer to an on disk VHDX header. */
88typedef VhdxHeader *PVhdxHeader;
89
90/** VHDX header signature ("head"). */
91#define VHDX_HEADER_SIGNATURE UINT32_C(0x64616568)
92/** Start offset of the first VHDX header. */
93#define VHDX_HEADER1_OFFSET _64K
94/** Start offset of the second VHDX header. */
95#define VHDX_HEADER2_OFFSET _128K
96/** Current Log format version. */
97#define VHDX_HEADER_LOG_VERSION UINT16_C(0)
98/** Current VHDX format version. */
99#define VHDX_HEADER_VHDX_VERSION UINT16_C(1)
100
101/**
102 * VHDX region table header
103 */
104#pragma pack(1)
105typedef struct VhdxRegionTblHdr
106{
107 /** Signature. */
108 uint32_t u32Signature;
109 /** Checksum. */
110 uint32_t u32Checksum;
111 /** Number of region table entries following this header. */
112 uint32_t u32EntryCount;
113 /** Reserved. */
114 uint32_t u32Reserved;
115} VhdxRegionTblHdr;
116#pragma pack()
117/** Pointer to an on disk VHDX region table header. */
118typedef VhdxRegionTblHdr *PVhdxRegionTblHdr;
119
120/** VHDX region table header signature. */
121#define VHDX_REGION_TBL_HDR_SIGNATURE UINT32_C(0x69676572)
122/** Maximum number of entries which can follow. */
123#define VHDX_REGION_TBL_HDR_ENTRY_COUNT_MAX UINT32_C(2047)
124/** Offset where the region table is stored (192 KB). */
125#define VHDX_REGION_TBL_HDR_OFFSET UINT64_C(196608)
126/** Maximum size of the region table. */
127#define VHDX_REGION_TBL_SIZE_MAX _64K
128
129/**
130 * VHDX region table entry.
131 */
132#pragma pack(1)
133typedef struct VhdxRegionTblEntry
134{
135 /** Object UUID. */
136 RTUUID UuidObject;
137 /** File offset of the region. */
138 uint64_t u64FileOffset;
139 /** Length of the region in bytes. */
140 uint32_t u32Length;
141 /** Flags for this object. */
142 uint32_t u32Flags;
143} VhdxRegionTblEntry;
144#pragma pack()
145/** Pointer to an on disk VHDX region table entry. */
146typedef struct VhdxRegionTblEntry *PVhdxRegionTblEntry;
147
148/** Flag whether this region is required. */
149#define VHDX_REGION_TBL_ENTRY_FLAGS_IS_REQUIRED RT_BIT_32(0)
150/** UUID for the BAT region. */
151#define VHDX_REGION_TBL_ENTRY_UUID_BAT "2dc27766-f623-4200-9d64-115e9bfd4a08"
152/** UUID for the metadata region. */
153#define VHDX_REGION_TBL_ENTRY_UUID_METADATA "8b7ca206-4790-4b9a-b8fe-575f050f886e"
154
155/**
156 * VHDX Log entry header.
157 */
158#pragma pack(1)
159typedef struct VhdxLogEntryHdr
160{
161 /** Signature. */
162 uint32_t u32Signature;
163 /** Checksum. */
164 uint32_t u32Checksum;
165 /** Total length of the entry in bytes. */
166 uint32_t u32EntryLength;
167 /** Tail of the log entries. */
168 uint32_t u32Tail;
169 /** Sequence number. */
170 uint64_t u64SequenceNumber;
171 /** Number of descriptors in this log entry. */
172 uint32_t u32DescriptorCount;
173 /** Reserved. */
174 uint32_t u32Reserved;
175 /** Log UUID. */
176 RTUUID UuidLog;
177 /** VHDX file size in bytes while the log entry was written. */
178 uint64_t u64FlushedFileOffset;
179 /** File size in bytes all allocated file structures fit into when the
180 * log entry was written. */
181 uint64_t u64LastFileOffset;
182} VhdxLogEntryHdr;
183#pragma pack()
184/** Pointer to an on disk VHDX log entry header. */
185typedef struct VhdxLogEntryHdr *PVhdxLogEntryHdr;
186
187/** VHDX log entry signature ("loge"). */
188#define VHDX_LOG_ENTRY_HEADER_SIGNATURE UINT32_C(0x65676f6c)
189
190/**
191 * VHDX log zero descriptor.
192 */
193#pragma pack(1)
194typedef struct VhdxLogZeroDesc
195{
196 /** Signature of this descriptor. */
197 uint32_t u32ZeroSignature;
198 /** Reserved. */
199 uint32_t u32Reserved;
200 /** Length of the section to zero. */
201 uint64_t u64ZeroLength;
202 /** File offset to write zeros to. */
203 uint64_t u64FileOffset;
204 /** Sequence number (must macht the field in the log entry header). */
205 uint64_t u64SequenceNumber;
206} VhdxLogZeroDesc;
207#pragma pack()
208/** Pointer to an on disk VHDX log zero descriptor. */
209typedef struct VhdxLogZeroDesc *PVhdxLogZeroDesc;
210
211/** Signature of a VHDX log zero descriptor ("zero"). */
212#define VHDX_LOG_ZERO_DESC_SIGNATURE UINT32_C(0x6f72657a)
213
214/**
215 * VHDX log data descriptor.
216 */
217#pragma pack(1)
218typedef struct VhdxLogDataDesc
219{
220 /** Signature of this descriptor. */
221 uint32_t u32DataSignature;
222 /** Trailing 4 bytes removed from the update. */
223 uint32_t u32TrailingBytes;
224 /** Leading 8 bytes removed from the update. */
225 uint64_t u64LeadingBytes;
226 /** File offset to write zeros to. */
227 uint64_t u64FileOffset;
228 /** Sequence number (must macht the field in the log entry header). */
229 uint64_t u64SequenceNumber;
230} VhdxLogDataDesc;
231#pragma pack()
232/** Pointer to an on disk VHDX log data descriptor. */
233typedef struct VhdxLogDataDesc *PVhdxLogDataDesc;
234
235/** Signature of a VHDX log data descriptor ("desc"). */
236#define VHDX_LOG_DATA_DESC_SIGNATURE UINT32_C(0x63736564)
237
238/**
239 * VHDX log data sector.
240 */
241#pragma pack(1)
242typedef struct VhdxLogDataSector
243{
244 /** Signature of the data sector. */
245 uint32_t u32DataSignature;
246 /** 4 most significant bytes of the sequence number. */
247 uint32_t u32SequenceHigh;
248 /** Raw data associated with the update. */
249 uint8_t u8Data[4084];
250 /** 4 least significant bytes of the sequence number. */
251 uint32_t u32SequenceLow;
252} VhdxLogDataSector;
253#pragma pack()
254/** Pointer to an on disk VHDX log data sector. */
255typedef VhdxLogDataSector *PVhdxLogDataSector;
256
257/** Signature of a VHDX log data sector ("data"). */
258#define VHDX_LOG_DATA_SECTOR_SIGNATURE UINT32_C(0x61746164)
259
260/**
261 * VHDX BAT entry.
262 */
263#pragma pack(1)
264typedef struct VhdxBatEntry
265{
266 /** The BAT entry, contains state and offset. */
267 uint64_t u64BatEntry;
268} VhdxBatEntry;
269#pragma pack()
270typedef VhdxBatEntry *PVhdxBatEntry;
271
272/** Return the BAT state from a given entry. */
273#define VHDX_BAT_ENTRY_GET_STATE(bat) ((bat) & UINT64_C(0x7))
274/** Get the FileOffsetMB field from a given BAT entry. */
275#define VHDX_BAT_ENTRY_GET_FILE_OFFSET_MB(bat) (((bat) & UINT64_C(0xfffffffffff00000)) >> 20)
276/** Get a byte offset from the BAT entry. */
277#define VHDX_BAT_ENTRY_GET_FILE_OFFSET(bat) (VHDX_BAT_ENTRY_GET_FILE_OFFSET_MB(bat) * (uint64_t)_1M)
278
279/** Block not present and the data is undefined. */
280#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_NOT_PRESENT (0)
281/** Data in this block is undefined. */
282#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_UNDEFINED (1)
283/** Data in this block contains zeros. */
284#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_ZERO (2)
285/** Block was unmapped by the application or system and data is either zero or
286 * the data before the block was unmapped. */
287#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_UNMAPPED (3)
288/** Block data is in the file pointed to by the FileOffsetMB field. */
289#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_FULLY_PRESENT (6)
290/** Block is partially present, use sector bitmap to get present sectors. */
291#define VHDX_BAT_ENTRY_PAYLOAD_BLOCK_PARTIALLY_PRESENT (7)
292
293/** The sector bitmap block is undefined and not allocated in the file. */
294#define VHDX_BAT_ENTRY_SB_BLOCK_NOT_PRESENT (0)
295/** The sector bitmap block is defined at the file location. */
296#define VHDX_BAT_ENTRY_SB_BLOCK_PRESENT (6)
297
298/**
299 * VHDX Metadata tabl header.
300 */
301#pragma pack(1)
302typedef struct VhdxMetadataTblHdr
303{
304 /** Signature. */
305 uint64_t u64Signature;
306 /** Reserved. */
307 uint16_t u16Reserved;
308 /** Number of entries in the table. */
309 uint16_t u16EntryCount;
310 /** Reserved */
311 uint32_t u32Reserved2[5];
312} VhdxMetadataTblHdr;
313#pragma pack()
314/** Pointer to an on disk metadata table header. */
315typedef VhdxMetadataTblHdr *PVhdxMetadataTblHdr;
316
317/** Signature of a VHDX metadata table header ("metadata"). */
318#define VHDX_METADATA_TBL_HDR_SIGNATURE UINT64_C(0x617461646174656d)
319/** Maximum number of entries the metadata table can have. */
320#define VHDX_METADATA_TBL_HDR_ENTRY_COUNT_MAX UINT16_C(2047)
321
322/**
323 * VHDX Metadata table entry.
324 */
325#pragma pack(1)
326typedef struct VhdxMetadataTblEntry
327{
328 /** Item UUID. */
329 RTUUID UuidItem;
330 /** Offset of the metadata item. */
331 uint32_t u32Offset;
332 /** Length of the metadata item. */
333 uint32_t u32Length;
334 /** Flags for the metadata item. */
335 uint32_t u32Flags;
336 /** Reserved. */
337 uint32_t u32Reserved;
338} VhdxMetadataTblEntry;
339#pragma pack()
340/** Pointer to an on disk metadata table entry. */
341typedef VhdxMetadataTblEntry *PVhdxMetadataTblEntry;
342
343/** FLag whether the metadata item is system or user metadata. */
344#define VHDX_METADATA_TBL_ENTRY_FLAGS_IS_USER RT_BIT_32(0)
345/** FLag whether the metadata item is file or virtual disk metadata. */
346#define VHDX_METADATA_TBL_ENTRY_FLAGS_IS_VDISK RT_BIT_32(1)
347/** FLag whether the backend must understand the metadata item to load the image. */
348#define VHDX_METADATA_TBL_ENTRY_FLAGS_IS_REQUIRED RT_BIT_32(2)
349
350/** File parameters item UUID. */
351#define VHDX_METADATA_TBL_ENTRY_ITEM_FILE_PARAMS "caa16737-fa36-4d43-b3b6-33f0aa44e76b"
352/** Virtual disk size item UUID. */
353#define VHDX_METADATA_TBL_ENTRY_ITEM_VDISK_SIZE "2fa54224-cd1b-4876-b211-5dbed83bf4b8"
354/** Page 83 UUID. */
355#define VHDX_METADATA_TBL_ENTRY_ITEM_PAGE83_DATA "beca12ab-b2e6-4523-93ef-c309e000c746"
356/** Logical sector size UUID. */
357#define VHDX_METADATA_TBL_ENTRY_ITEM_LOG_SECT_SIZE "8141bf1d-a96f-4709-ba47-f233a8faab5f"
358/** Physical sector size UUID. */
359#define VHDX_METADATA_TBL_ENTRY_ITEM_PHYS_SECT_SIZE "cda348c7-445d-4471-9cc9-e9885251c556"
360/** Parent locator UUID. */
361#define VHDX_METADATA_TBL_ENTRY_ITEM_PARENT_LOCATOR "a8d35f2d-b30b-454d-abf7-d3d84834ab0c"
362
363/**
364 * VHDX File parameters metadata item.
365 */
366#pragma pack(1)
367typedef struct VhdxFileParameters
368{
369 /** Block size. */
370 uint32_t u32BlockSize;
371 /** Flags. */
372 uint32_t u32Flags;
373} VhdxFileParameters;
374#pragma pack()
375/** Pointer to an on disk VHDX file parameters metadata item. */
376typedef struct VhdxFileParameters *PVhdxFileParameters;
377
378/** Flag whether to leave blocks allocated in the file or if it is possible to unmap them. */
379#define VHDX_FILE_PARAMETERS_FLAGS_LEAVE_BLOCKS_ALLOCATED RT_BIT_32(0)
380/** Flag whether this file has a parent VHDX file. */
381#define VHDX_FILE_PARAMETERS_FLAGS_HAS_PARENT RT_BIT_32(1)
382
383/**
384 * VHDX virtual disk size metadata item.
385 */
386#pragma pack(1)
387typedef struct VhdxVDiskSize
388{
389 /** Virtual disk size. */
390 uint64_t u64VDiskSize;
391} VhdxVDiskSize;
392#pragma pack()
393/** Pointer to an on disk VHDX virtual disk size metadata item. */
394typedef struct VhdxVDiskSize *PVhdxVDiskSize;
395
396/**
397 * VHDX page 83 data metadata item.
398 */
399#pragma pack(1)
400typedef struct VhdxPage83Data
401{
402 /** UUID for the SCSI device. */
403 RTUUID UuidPage83Data;
404} VhdxPage83Data;
405#pragma pack()
406/** Pointer to an on disk VHDX vpage 83 data metadata item. */
407typedef struct VhdxPage83Data *PVhdxPage83Data;
408
409/**
410 * VHDX virtual disk logical sector size.
411 */
412#pragma pack(1)
413typedef struct VhdxVDiskLogicalSectorSize
414{
415 /** Logical sector size. */
416 uint32_t u32LogicalSectorSize;
417} VhdxVDiskLogicalSectorSize;
418#pragma pack()
419/** Pointer to an on disk VHDX virtual disk logical sector size metadata item. */
420typedef struct VhdxVDiskLogicalSectorSize *PVhdxVDiskLogicalSectorSize;
421
422/**
423 * VHDX virtual disk physical sector size.
424 */
425#pragma pack(1)
426typedef struct VhdxVDiskPhysicalSectorSize
427{
428 /** Physical sector size. */
429 uint64_t u64PhysicalSectorSize;
430} VhdxVDiskPhysicalSectorSize;
431#pragma pack()
432/** Pointer to an on disk VHDX virtual disk physical sector size metadata item. */
433typedef struct VhdxVDiskPhysicalSectorSize *PVhdxVDiskPhysicalSectorSize;
434
435/**
436 * VHDX parent locator header.
437 */
438#pragma pack(1)
439typedef struct VhdxParentLocatorHeader
440{
441 /** Locator type UUID. */
442 RTUUID UuidLocatorType;
443 /** Reserved. */
444 uint16_t u16Reserved;
445 /** Number of key value pairs. */
446 uint16_t u16KeyValueCount;
447} VhdxParentLocatorHeader;
448#pragma pack()
449/** Pointer to an on disk VHDX parent locator header metadata item. */
450typedef struct VhdxParentLocatorHeader *PVhdxParentLocatorHeader;
451
452/** VHDX parent locator type. */
453#define VHDX_PARENT_LOCATOR_TYPE_VHDX "b04aefb7-d19e-4a81-b789-25b8e9445913"
454
455/**
456 * VHDX parent locator entry.
457 */
458#pragma pack(1)
459typedef struct VhdxParentLocatorEntry
460{
461 /** Offset of the key. */
462 uint32_t u32KeyOffset;
463 /** Offset of the value. */
464 uint32_t u32ValueOffset;
465 /** Length of the key. */
466 uint16_t u16KeyLength;
467 /** Length of the value. */
468 uint16_t u16ValueLength;
469} VhdxParentLocatorEntry;
470#pragma pack()
471/** Pointer to an on disk VHDX parent locator entry. */
472typedef struct VhdxParentLocatorEntry *PVhdxParentLocatorEntry;
473
474/*******************************************************************************
475* Constants And Macros, Structures and Typedefs *
476*******************************************************************************/
477
478typedef enum VHDXMETADATAITEM
479{
480 VHDXMETADATAITEM_UNKNOWN = 0,
481 VHDXMETADATAITEM_FILE_PARAMS,
482 VHDXMETADATAITEM_VDISK_SIZE,
483 VHDXMETADATAITEM_PAGE83_DATA,
484 VHDXMETADATAITEM_LOGICAL_SECTOR_SIZE,
485 VHDXMETADATAITEM_PHYSICAL_SECTOR_SIZE,
486 VHDXMETADATAITEM_PARENT_LOCATOR,
487 VHDXMETADATAITEM_32BIT_HACK = 0x7fffffff
488} VHDXMETADATAITEM;
489
490/**
491 * Table to validate the metadata item UUIDs and the flags.
492 */
493typedef struct VHDXMETADATAITEMPROPS
494{
495 /** Item UUID. */
496 const char *pszItemUuid;
497 /** Flag whether this is a user or system metadata item. */
498 bool fIsUser;
499 /** Flag whether this is a virtual disk or file metadata item. */
500 bool fIsVDisk;
501 /** Flag whether this metadata item is required to load the file. */
502 bool fIsRequired;
503 /** Metadata item enum associated with this UUID. */
504 VHDXMETADATAITEM enmMetadataItem;
505} VHDXMETADATAITEMPROPS;
506
507/**
508 * VHDX image data structure.
509 */
510typedef struct VHDXIMAGE
511{
512 /** Image name. */
513 const char *pszFilename;
514 /** Storage handle. */
515 PVDIOSTORAGE pStorage;
516
517 /** Pointer to the per-disk VD interface list. */
518 PVDINTERFACE pVDIfsDisk;
519 /** Pointer to the per-image VD interface list. */
520 PVDINTERFACE pVDIfsImage;
521 /** Error interface. */
522 PVDINTERFACEERROR pIfError;
523 /** I/O interface. */
524 PVDINTERFACEIOINT pIfIo;
525
526 /** Open flags passed by VBoxHD layer. */
527 unsigned uOpenFlags;
528 /** Image flags defined during creation or determined during open. */
529 unsigned uImageFlags;
530 /** Version of the VHDX image format. */
531 unsigned uVersion;
532 /** Total size of the image. */
533 uint64_t cbSize;
534 /** Logical sector size of the image. */
535 size_t cbLogicalSector;
536 /** Block size of the image. */
537 size_t cbBlock;
538 /** Physical geometry of this image. */
539 VDGEOMETRY PCHSGeometry;
540 /** Logical geometry of this image. */
541 VDGEOMETRY LCHSGeometry;
542
543 /** The BAT. */
544 PVhdxBatEntry paBat;
545 /** Chunk ratio. */
546 uint32_t uChunkRatio;
547
548} VHDXIMAGE, *PVHDXIMAGE;
549
550/**
551 * Endianess conversion direction.
552 */
553typedef enum VHDXECONV
554{
555 /** Host to file endianess. */
556 VHDXECONV_H2F = 0,
557 /** File to host endianess. */
558 VHDXECONV_F2H
559} VHDXECONV;
560
561/** Macros for endianess conversion. */
562#define SET_ENDIAN_U16(u16) (enmConv == VHDXECONV_H2F ? RT_H2LE_U16(u16) : RT_LE2H_U16(u16))
563#define SET_ENDIAN_U32(u32) (enmConv == VHDXECONV_H2F ? RT_H2LE_U32(u32) : RT_LE2H_U32(u32))
564#define SET_ENDIAN_U64(u64) (enmConv == VHDXECONV_H2F ? RT_H2LE_U64(u64) : RT_LE2H_U64(u64))
565
566/*******************************************************************************
567* Static Variables *
568*******************************************************************************/
569
570/**
571 * NULL-terminated array of supported file extensions.
572 */
573static const VDFILEEXTENSION s_aVhdxFileExtensions[] =
574{
575 {"vhdx", VDTYPE_HDD},
576 {NULL, VDTYPE_INVALID}
577};
578
579/**
580 * Static table to verify the metadata item properties and the flags.
581 */
582static const VHDXMETADATAITEMPROPS s_aVhdxMetadataItemProps[] =
583{
584 /* pcszItemUuid fIsUser, fIsVDisk, fIsRequired, enmMetadataItem */
585 {VHDX_METADATA_TBL_ENTRY_ITEM_FILE_PARAMS, false, false, true, VHDXMETADATAITEM_FILE_PARAMS},
586 {VHDX_METADATA_TBL_ENTRY_ITEM_VDISK_SIZE, false, true, true, VHDXMETADATAITEM_VDISK_SIZE},
587 {VHDX_METADATA_TBL_ENTRY_ITEM_PAGE83_DATA, false, true, true, VHDXMETADATAITEM_PAGE83_DATA},
588 {VHDX_METADATA_TBL_ENTRY_ITEM_LOG_SECT_SIZE, false, true, true, VHDXMETADATAITEM_LOGICAL_SECTOR_SIZE},
589 {VHDX_METADATA_TBL_ENTRY_ITEM_PHYS_SECT_SIZE, false, true, false, VHDXMETADATAITEM_PHYSICAL_SECTOR_SIZE},
590 {VHDX_METADATA_TBL_ENTRY_ITEM_PARENT_LOCATOR, false, false, true, VHDXMETADATAITEM_PARENT_LOCATOR}
591};
592
593/*******************************************************************************
594* Internal Functions *
595*******************************************************************************/
596
597/**
598 * Converts the file identifier between file and host endianness.
599 *
600 * @returns nothing.
601 * @param enmConv Direction of the conversion.
602 * @param pFileIdentifierConv Where to store the converted file identifier.
603 * @param pFileIdentifier The file identifier to convert.
604 *
605 * @note It is safe to use the same pointer for pFileIdentifierConv and pFileIdentifier.
606 */
607DECLINLINE(void) vhdxConvFileIdentifierEndianess(VHDXECONV enmConv, PVhdxFileIdentifier pFileIdentifierConv,
608 PVhdxFileIdentifier pFileIdentifier)
609{
610 pFileIdentifierConv->u64Signature = SET_ENDIAN_U64(pFileIdentifier->u64Signature);
611 for (unsigned i = 0; i < RT_ELEMENTS(pFileIdentifierConv->awszCreator); i++)
612 pFileIdentifierConv->awszCreator[i] = SET_ENDIAN_U16(pFileIdentifier->awszCreator[i]);
613}
614
615/**
616 * Converts a UUID between file and host endianness.
617 *
618 * @returns nothing.
619 * @param enmConv Direction of the conversion.
620 * @param pUuidConv Where to store the converted UUID.
621 * @param pUuid The UUID to convert.
622 *
623 * @note It is safe to use the same pointer for pUuidConv and pUuid.
624 */
625DECLINLINE(void) vhdxConvUuidEndianess(VHDXECONV enmConv, PRTUUID pUuidConv, PRTUUID pUuid)
626{
627#if 1
628 memcpy(pUuidConv, pUuid, sizeof(RTUUID));
629#else
630 pUuidConv->Gen.u32TimeLow = SET_ENDIAN_U32(pUuid->Gen.u32TimeLow);
631 pUuidConv->Gen.u16TimeMid = SET_ENDIAN_U16(pUuid->Gen.u16TimeMid);
632 pUuidConv->Gen.u16TimeHiAndVersion = SET_ENDIAN_U16(pUuid->Gen.u16TimeHiAndVersion);
633 pUuidConv->Gen.u8ClockSeqHiAndReserved = pUuid->Gen.u8ClockSeqHiAndReserved;
634 pUuidConv->Gen.u8ClockSeqLow = pUuid->Gen.u8ClockSeqLow;
635 for (unsigned i = 0; i < RT_ELEMENTS(pUuidConv->Gen.au8Node); i++)
636 pUuidConv->Gen.au8Node[i] = pUuid->Gen.au8Node[i];
637#endif
638}
639
640/**
641 * Converts a VHDX header between file and host endianness.
642 *
643 * @returns nothing.
644 * @param enmConv Direction of the conversion.
645 * @param pHdrConv Where to store the converted header.
646 * @param pHdr The VHDX header to convert.
647 *
648 * @note It is safe to use the same pointer for pHdrConv and pHdr.
649 */
650DECLINLINE(void) vhdxConvHeaderEndianess(VHDXECONV enmConv, PVhdxHeader pHdrConv, PVhdxHeader pHdr)
651{
652 pHdrConv->u32Signature = SET_ENDIAN_U32(pHdr->u32Signature);
653 pHdrConv->u32Checksum = SET_ENDIAN_U32(pHdr->u32Checksum);
654 pHdrConv->u64SequenceNumber = SET_ENDIAN_U64(pHdr->u64SequenceNumber);
655 vhdxConvUuidEndianess(enmConv, &pHdrConv->UuidFileWrite, &pHdrConv->UuidFileWrite);
656 vhdxConvUuidEndianess(enmConv, &pHdrConv->UuidDataWrite, &pHdrConv->UuidDataWrite);
657 vhdxConvUuidEndianess(enmConv, &pHdrConv->UuidLog, &pHdrConv->UuidLog);
658 pHdrConv->u16LogVersion = SET_ENDIAN_U16(pHdr->u16LogVersion);
659 pHdrConv->u16Version = SET_ENDIAN_U16(pHdr->u16Version);
660 pHdrConv->u32LogLength = SET_ENDIAN_U32(pHdr->u32LogLength);
661 pHdrConv->u64LogOffset = SET_ENDIAN_U64(pHdr->u64LogOffset);
662}
663
664/**
665 * Converts a VHDX region table header between file and host endianness.
666 *
667 * @returns nothing.
668 * @param enmConv Direction of the conversion.
669 * @param pRegTblHdrConv Where to store the converted header.
670 * @param pRegTblHdr The VHDX region table header to convert.
671 *
672 * @note It is safe to use the same pointer for pRegTblHdrConv and pRegTblHdr.
673 */
674DECLINLINE(void) vhdxConvRegionTblHdrEndianess(VHDXECONV enmConv, PVhdxRegionTblHdr pRegTblHdrConv,
675 PVhdxRegionTblHdr pRegTblHdr)
676{
677 pRegTblHdrConv->u32Signature = SET_ENDIAN_U32(pRegTblHdr->u32Signature);
678 pRegTblHdrConv->u32Checksum = SET_ENDIAN_U32(pRegTblHdr->u32Checksum);
679 pRegTblHdrConv->u32EntryCount = SET_ENDIAN_U32(pRegTblHdr->u32EntryCount);
680 pRegTblHdrConv->u32Reserved = SET_ENDIAN_U32(pRegTblHdr->u32Reserved);
681}
682
683/**
684 * Converts a VHDX region table entry between file and host endianness.
685 *
686 * @returns nothing.
687 * @param enmConv Direction of the conversion.
688 * @param pRegTblEntConv Where to store the converted region table entry.
689 * @param pRegTblEnt The VHDX region table entry to convert.
690 *
691 * @note It is safe to use the same pointer for pRegTblEntConv and pRegTblEnt.
692 */
693DECLINLINE(void) vhdxConvRegionTblEntryEndianess(VHDXECONV enmConv, PVhdxRegionTblEntry pRegTblEntConv,
694 PVhdxRegionTblEntry pRegTblEnt)
695{
696 vhdxConvUuidEndianess(enmConv, &pRegTblEntConv->UuidObject, &pRegTblEnt->UuidObject);
697 pRegTblEntConv->u64FileOffset = SET_ENDIAN_U64(pRegTblEnt->u64FileOffset);
698 pRegTblEntConv->u32Length = SET_ENDIAN_U32(pRegTblEnt->u32Length);
699 pRegTblEntConv->u32Flags = SET_ENDIAN_U32(pRegTblEnt->u32Flags);
700}
701
702/**
703 * Converts a VHDX log entry header between file and host endianness.
704 *
705 * @returns nothing.
706 * @param enmConv Direction of the conversion.
707 * @param pLogEntryHdrConv Where to store the converted log entry header.
708 * @param pLogEntryHdr The VHDX log entry header to convert.
709 *
710 * @note It is safe to use the same pointer for pLogEntryHdrConv and pLogEntryHdr.
711 */
712DECLINLINE(void) vhdxConvLogEntryHdrEndianess(VHDXECONV enmConv, PVhdxLogEntryHdr pLogEntryHdrConv,
713 PVhdxLogEntryHdr pLogEntryHdr)
714{
715 pLogEntryHdrConv->u32Signature = SET_ENDIAN_U32(pLogEntryHdr->u32Signature);
716 pLogEntryHdrConv->u32Checksum = SET_ENDIAN_U32(pLogEntryHdr->u32Checksum);
717 pLogEntryHdrConv->u32EntryLength = SET_ENDIAN_U32(pLogEntryHdr->u32EntryLength);
718 pLogEntryHdrConv->u32Tail = SET_ENDIAN_U32(pLogEntryHdr->u32Tail);
719 pLogEntryHdrConv->u64SequenceNumber = SET_ENDIAN_U64(pLogEntryHdr->u64SequenceNumber);
720 pLogEntryHdrConv->u32DescriptorCount = SET_ENDIAN_U32(pLogEntryHdr->u32DescriptorCount);
721 pLogEntryHdrConv->u32Reserved = SET_ENDIAN_U32(pLogEntryHdr->u32Reserved);
722 vhdxConvUuidEndianess(enmConv, &pLogEntryHdrConv->UuidLog, &pLogEntryHdr->UuidLog);
723 pLogEntryHdrConv->u64FlushedFileOffset = SET_ENDIAN_U64(pLogEntryHdr->u64FlushedFileOffset);
724}
725
726/**
727 * Converts a VHDX log zero descriptor between file and host endianness.
728 *
729 * @returns nothing.
730 * @param enmConv Direction of the conversion.
731 * @param pLogZeroDescConv Where to store the converted log zero descriptor.
732 * @param pLogZeroDesc The VHDX log zero descriptor to convert.
733 *
734 * @note It is safe to use the same pointer for pLogZeroDescConv and pLogZeroDesc.
735 */
736DECLINLINE(void) vhdxConvLogZeroDescEndianess(VHDXECONV enmConv, PVhdxLogZeroDesc pLogZeroDescConv,
737 PVhdxLogZeroDesc pLogZeroDesc)
738{
739 pLogZeroDescConv->u32ZeroSignature = SET_ENDIAN_U32(pLogZeroDesc->u32ZeroSignature);
740 pLogZeroDescConv->u32Reserved = SET_ENDIAN_U32(pLogZeroDesc->u32Reserved);
741 pLogZeroDescConv->u64ZeroLength = SET_ENDIAN_U64(pLogZeroDesc->u64ZeroLength);
742 pLogZeroDescConv->u64FileOffset = SET_ENDIAN_U64(pLogZeroDesc->u64FileOffset);
743 pLogZeroDescConv->u64SequenceNumber = SET_ENDIAN_U64(pLogZeroDesc->u64SequenceNumber);
744}
745
746/**
747 * Converts a VHDX log data descriptor between file and host endianness.
748 *
749 * @returns nothing.
750 * @param enmConv Direction of the conversion.
751 * @param pLogDataDescConv Where to store the converted log data descriptor.
752 * @param pLogDataDesc The VHDX log data descriptor to convert.
753 *
754 * @note It is safe to use the same pointer for pLogDataDescConv and pLogDataDesc.
755 */
756DECLINLINE(void) vhdxConvLogDataDescEndianess(VHDXECONV enmConv, PVhdxLogDataDesc pLogDataDescConv,
757 PVhdxLogDataDesc pLogDataDesc)
758{
759 pLogDataDescConv->u32DataSignature = SET_ENDIAN_U32(pLogDataDesc->u32DataSignature);
760 pLogDataDescConv->u32TrailingBytes = SET_ENDIAN_U32(pLogDataDesc->u32TrailingBytes);
761 pLogDataDescConv->u64LeadingBytes = SET_ENDIAN_U64(pLogDataDesc->u64LeadingBytes);
762 pLogDataDescConv->u64FileOffset = SET_ENDIAN_U64(pLogDataDesc->u64FileOffset);
763 pLogDataDescConv->u64SequenceNumber = SET_ENDIAN_U64(pLogDataDesc->u64SequenceNumber);
764}
765
766/**
767 * Converts a VHDX log data sector between file and host endianness.
768 *
769 * @returns nothing.
770 * @param enmConv Direction of the conversion.
771 * @param pLogDataSectorConv Where to store the converted log data sector.
772 * @param pLogDataSector The VHDX log data sector to convert.
773 *
774 * @note It is safe to use the same pointer for pLogDataSectorConv and pLogDataSector.
775 */
776DECLINLINE(void) vhdxConvLogDataSectorEndianess(VHDXECONV enmConv, PVhdxLogDataSector pLogDataSectorConv,
777 PVhdxLogDataSector pLogDataSector)
778{
779 pLogDataSectorConv->u32DataSignature = SET_ENDIAN_U32(pLogDataSector->u32DataSignature);
780 pLogDataSectorConv->u32SequenceHigh = SET_ENDIAN_U32(pLogDataSector->u32SequenceHigh);
781 pLogDataSectorConv->u32SequenceLow = SET_ENDIAN_U32(pLogDataSector->u32SequenceLow);
782}
783
784/**
785 * Converts a BAT between file and host endianess.
786 *
787 * @returns nothing.
788 * @param enmConv Direction of the conversion.
789 * @param paBatEntriesConv Where to store the converted BAT.
790 * @param paBatEntries The VHDX BAT to convert.
791 *
792 * @note It is safe to use the same pointer for paBatEntriesConv and paBatEntries.
793 */
794DECLINLINE(void) vhdxConvBatTableEndianess(VHDXECONV enmConv, PVhdxBatEntry paBatEntriesConv,
795 PVhdxBatEntry paBatEntries, uint32_t cBatEntries)
796{
797 for (uint32_t i = 0; i < cBatEntries; i++)
798 paBatEntriesConv[i].u64BatEntry = SET_ENDIAN_U64(paBatEntries[i].u64BatEntry);
799}
800
801/**
802 * Converts a VHDX metadata table header between file and host endianness.
803 *
804 * @returns nothing.
805 * @param enmConv Direction of the conversion.
806 * @param pMetadataTblHdrConv Where to store the converted metadata table header.
807 * @param pMetadataTblHdr The VHDX metadata table header to convert.
808 *
809 * @note It is safe to use the same pointer for pMetadataTblHdrConv and pMetadataTblHdr.
810 */
811DECLINLINE(void) vhdxConvMetadataTblHdrEndianess(VHDXECONV enmConv, PVhdxMetadataTblHdr pMetadataTblHdrConv,
812 PVhdxMetadataTblHdr pMetadataTblHdr)
813{
814 pMetadataTblHdrConv->u64Signature = SET_ENDIAN_U64(pMetadataTblHdr->u64Signature);
815 pMetadataTblHdrConv->u16Reserved = SET_ENDIAN_U16(pMetadataTblHdr->u16Reserved);
816 pMetadataTblHdrConv->u16EntryCount = SET_ENDIAN_U16(pMetadataTblHdr->u16EntryCount);
817 for (unsigned i = 0; i < RT_ELEMENTS(pMetadataTblHdr->u32Reserved2); i++)
818 pMetadataTblHdrConv->u32Reserved2[i] = SET_ENDIAN_U32(pMetadataTblHdr->u32Reserved2[i]);
819}
820
821/**
822 * Converts a VHDX metadata table entry between file and host endianness.
823 *
824 * @returns nothing.
825 * @param enmConv Direction of the conversion.
826 * @param pMetadataTblEntryConv Where to store the converted metadata table entry.
827 * @param pMetadataTblEntry The VHDX metadata table entry to convert.
828 *
829 * @note It is safe to use the same pointer for pMetadataTblEntryConv and pMetadataTblEntry.
830 */
831DECLINLINE(void) vhdxConvMetadataTblEntryEndianess(VHDXECONV enmConv, PVhdxMetadataTblEntry pMetadataTblEntryConv,
832 PVhdxMetadataTblEntry pMetadataTblEntry)
833{
834 vhdxConvUuidEndianess(enmConv, &pMetadataTblEntryConv->UuidItem, &pMetadataTblEntry->UuidItem);
835 pMetadataTblEntryConv->u32Offset = SET_ENDIAN_U32(pMetadataTblEntry->u32Offset);
836 pMetadataTblEntryConv->u32Length = SET_ENDIAN_U32(pMetadataTblEntry->u32Length);
837 pMetadataTblEntryConv->u32Flags = SET_ENDIAN_U32(pMetadataTblEntry->u32Flags);
838 pMetadataTblEntryConv->u32Reserved = SET_ENDIAN_U32(pMetadataTblEntry->u32Reserved);
839}
840
841/**
842 * Converts a VHDX file parameters item between file and host endianness.
843 *
844 * @returns nothing.
845 * @param enmConv Direction of the conversion.
846 * @param pFileParamsConv Where to store the converted file parameters item entry.
847 * @param pFileParams The VHDX file parameters item to convert.
848 *
849 * @note It is safe to use the same pointer for pFileParamsConv and pFileParams.
850 */
851DECLINLINE(void) vhdxConvFileParamsEndianess(VHDXECONV enmConv, PVhdxFileParameters pFileParamsConv,
852 PVhdxFileParameters pFileParams)
853{
854 pFileParamsConv->u32BlockSize = SET_ENDIAN_U32(pFileParams->u32BlockSize);
855 pFileParamsConv->u32Flags = SET_ENDIAN_U32(pFileParams->u32Flags);
856}
857
858/**
859 * Converts a VHDX virtual disk size item between file and host endianness.
860 *
861 * @returns nothing.
862 * @param enmConv Direction of the conversion.
863 * @param pVDiskSizeConv Where to store the converted virtual disk size item entry.
864 * @param pVDiskSize The VHDX virtual disk size item to convert.
865 *
866 * @note It is safe to use the same pointer for pVDiskSizeConv and pVDiskSize.
867 */
868DECLINLINE(void) vhdxConvVDiskSizeEndianess(VHDXECONV enmConv, PVhdxVDiskSize pVDiskSizeConv,
869 PVhdxVDiskSize pVDiskSize)
870{
871 pVDiskSizeConv->u64VDiskSize = SET_ENDIAN_U64(pVDiskSize->u64VDiskSize);
872}
873
874/**
875 * Converts a VHDX page 83 data item between file and host endianness.
876 *
877 * @returns nothing.
878 * @param enmConv Direction of the conversion.
879 * @param pPage83DataConv Where to store the converted page 83 data item entry.
880 * @param pPage83Data The VHDX page 83 data item to convert.
881 *
882 * @note It is safe to use the same pointer for pPage83DataConv and pPage83Data.
883 */
884DECLINLINE(void) vhdxConvPage83DataEndianess(VHDXECONV enmConv, PVhdxPage83Data pPage83DataConv,
885 PVhdxPage83Data pPage83Data)
886{
887 vhdxConvUuidEndianess(enmConv, &pPage83DataConv->UuidPage83Data, &pPage83Data->UuidPage83Data);
888}
889
890/**
891 * Converts a VHDX logical sector size item between file and host endianness.
892 *
893 * @returns nothing.
894 * @param enmConv Direction of the conversion.
895 * @param pVDiskLogSectSizeConv Where to store the converted logical sector size item entry.
896 * @param pVDiskLogSectSize The VHDX logical sector size item to convert.
897 *
898 * @note It is safe to use the same pointer for pVDiskLogSectSizeConv and pVDiskLogSectSize.
899 */
900DECLINLINE(void) vhdxConvVDiskLogSectSizeEndianess(VHDXECONV enmConv, PVhdxVDiskLogicalSectorSize pVDiskLogSectSizeConv,
901 PVhdxVDiskLogicalSectorSize pVDiskLogSectSize)
902{
903 pVDiskLogSectSizeConv->u32LogicalSectorSize = SET_ENDIAN_U32(pVDiskLogSectSize->u32LogicalSectorSize);
904}
905
906/**
907 * Converts a VHDX physical sector size item between file and host endianness.
908 *
909 * @returns nothing.
910 * @param enmConv Direction of the conversion.
911 * @param pVDiskPhysSectSizeConv Where to store the converted physical sector size item entry.
912 * @param pVDiskPhysSectSize The VHDX physical sector size item to convert.
913 *
914 * @note It is safe to use the same pointer for pVDiskPhysSectSizeConv and pVDiskPhysSectSize.
915 */
916DECLINLINE(void) vhdxConvVDiskPhysSectSizeEndianess(VHDXECONV enmConv, PVhdxVDiskPhysicalSectorSize pVDiskPhysSectSizeConv,
917 PVhdxVDiskPhysicalSectorSize pVDiskPhysSectSize)
918{
919 pVDiskPhysSectSizeConv->u64PhysicalSectorSize = SET_ENDIAN_U64(pVDiskPhysSectSize->u64PhysicalSectorSize);
920}
921
922/**
923 * Converts a VHDX parent locator header item between file and host endianness.
924 *
925 * @returns nothing.
926 * @param enmConv Direction of the conversion.
927 * @param pParentLocatorHdrConv Where to store the converted parent locator header item entry.
928 * @param pParentLocatorHdr The VHDX parent locator header item to convert.
929 *
930 * @note It is safe to use the same pointer for pParentLocatorHdrConv and pParentLocatorHdr.
931 */
932DECLINLINE(void) vhdxConvParentLocatorHeaderEndianness(VHDXECONV enmConv, PVhdxParentLocatorHeader pParentLocatorHdrConv,
933 PVhdxParentLocatorHeader pParentLocatorHdr)
934{
935 vhdxConvUuidEndianess(enmConv, &pParentLocatorHdrConv->UuidLocatorType, &pParentLocatorHdr->UuidLocatorType);
936 pParentLocatorHdrConv->u16Reserved = SET_ENDIAN_U16(pParentLocatorHdr->u16Reserved);
937 pParentLocatorHdrConv->u16KeyValueCount = SET_ENDIAN_U16(pParentLocatorHdr->u16KeyValueCount);
938}
939
940/**
941 * Converts a VHDX parent locator entry between file and host endianness.
942 *
943 * @returns nothing.
944 * @param enmConv Direction of the conversion.
945 * @param pParentLocatorEntryConv Where to store the converted parent locator entry.
946 * @param pParentLocatorEntry The VHDX parent locator entry to convert.
947 *
948 * @note It is safe to use the same pointer for pParentLocatorEntryConv and pParentLocatorEntry.
949 */
950DECLINLINE(void) vhdxConvParentLocatorEntryEndianess(VHDXECONV enmConv, PVhdxParentLocatorEntry pParentLocatorEntryConv,
951 PVhdxParentLocatorEntry pParentLocatorEntry)
952{
953 pParentLocatorEntryConv->u32KeyOffset = SET_ENDIAN_U32(pParentLocatorEntry->u32KeyOffset);
954 pParentLocatorEntryConv->u32ValueOffset = SET_ENDIAN_U32(pParentLocatorEntry->u32ValueOffset);
955 pParentLocatorEntryConv->u16KeyLength = SET_ENDIAN_U16(pParentLocatorEntry->u16KeyLength);
956 pParentLocatorEntryConv->u16ValueLength = SET_ENDIAN_U16(pParentLocatorEntry->u16ValueLength);
957}
958
959/**
960 * Internal. Free all allocated space for representing an image except pImage,
961 * and optionally delete the image from disk.
962 */
963static int vhdxFreeImage(PVHDXIMAGE pImage, bool fDelete)
964{
965 int rc = VINF_SUCCESS;
966
967 /* Freeing a never allocated image (e.g. because the open failed) is
968 * not signalled as an error. After all nothing bad happens. */
969 if (pImage)
970 {
971 if (pImage->pStorage)
972 {
973 vdIfIoIntFileClose(pImage->pIfIo, pImage->pStorage);
974 pImage->pStorage = NULL;
975 }
976
977 if (pImage->paBat)
978 {
979 RTMemFree(pImage->paBat);
980 pImage->paBat = NULL;
981 }
982
983 if (fDelete && pImage->pszFilename)
984 vdIfIoIntFileDelete(pImage->pIfIo, pImage->pszFilename);
985 }
986
987 LogFlowFunc(("returns %Rrc\n", rc));
988 return rc;
989}
990
991/**
992 * Loads all required fields from the given VHDX header.
993 * The header must be converted to the host endianess and validated already.
994 *
995 * @returns VBox status code.
996 * @param pImage Image instance data.
997 * @param pHdr The header to load.
998 */
999static int vhdxLoadHeader(PVHDXIMAGE pImage, PVhdxHeader pHdr)
1000{
1001 int rc = VINF_SUCCESS;
1002
1003 LogFlowFunc(("pImage=%#p pHdr=%#p\n", pImage, pHdr));
1004
1005 /*
1006 * Most fields in the header are not required because the backend implements
1007 * readonly access only so far.
1008 * We just have to check that the log is empty, we have to refuse to load the
1009 * image otherwsie because replaying the log is not implemented.
1010 */
1011 if (pHdr->u16Version == VHDX_HEADER_VHDX_VERSION)
1012 {
1013 /* Check that the log UUID is zero. */
1014 pImage->uVersion = pHdr->u16Version;
1015 if (!RTUuidIsNull(&pHdr->UuidLog))
1016 rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
1017 "VHDX: Image \'%s\' has a non empty log which is not supported",
1018 pImage->pszFilename);
1019 }
1020 else
1021 rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
1022 "VHDX: Image \'%s\' uses an unsupported version (%u) of the VHDX format",
1023 pImage->pszFilename, pHdr->u16Version);
1024
1025 LogFlowFunc(("return rc=%Rrc\n", rc));
1026 return rc;
1027}
1028
1029/**
1030 * Determines the current header and loads it.
1031 *
1032 * @returns VBox status code.
1033 * @param pImage Image instance data.
1034 */
1035static int vhdxFindAndLoadCurrentHeader(PVHDXIMAGE pImage)
1036{
1037 PVhdxHeader pHdr1, pHdr2;
1038 uint32_t u32ChkSum = 0;
1039 uint32_t u32ChkSumSaved = 0;
1040 bool fHdr1Valid = false;
1041 bool fHdr2Valid = false;
1042 int rc = VINF_SUCCESS;
1043
1044 LogFlowFunc(("pImage=%#p\n", pImage));
1045
1046 /*
1047 * The VHDX format defines two headers at different offsets to provide failure
1048 * consistency. Only one header is current. This can be determined using the
1049 * sequence number and checksum fields in the header.
1050 */
1051 pHdr1 = (PVhdxHeader)RTMemAllocZ(sizeof(VhdxHeader));
1052 pHdr2 = (PVhdxHeader)RTMemAllocZ(sizeof(VhdxHeader));
1053
1054 if (pHdr1 && pHdr2)
1055 {
1056 /* Read the first header. */
1057 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, VHDX_HEADER1_OFFSET,
1058 pHdr1, sizeof(*pHdr1), NULL);
1059 if (RT_SUCCESS(rc))
1060 {
1061 vhdxConvHeaderEndianess(VHDXECONV_F2H, pHdr1, pHdr1);
1062
1063 /* Validate checksum. */
1064 u32ChkSumSaved = pHdr1->u32Checksum;
1065 pHdr1->u32Checksum = 0;
1066 //u32ChkSum = RTCrc32C(pHdr1, sizeof(*pHdr1));
1067
1068 if ( pHdr1->u32Signature == VHDX_HEADER_SIGNATURE
1069 /*&& u32ChkSum == u32ChkSumSaved*/)
1070 fHdr1Valid = true;
1071 }
1072
1073 /* Try to read the second header in any case (even if reading the first failed). */
1074 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, VHDX_HEADER2_OFFSET,
1075 pHdr2, sizeof(*pHdr2), NULL);
1076 if (RT_SUCCESS(rc))
1077 {
1078 vhdxConvHeaderEndianess(VHDXECONV_F2H, pHdr2, pHdr2);
1079
1080 /* Validate checksum. */
1081 u32ChkSumSaved = pHdr2->u32Checksum;
1082 pHdr2->u32Checksum = 0;
1083 //u32ChkSum = RTCrc32C(pHdr2, sizeof(*pHdr2));
1084
1085 if ( pHdr2->u32Signature == VHDX_HEADER_SIGNATURE
1086 /*&& u32ChkSum == u32ChkSumSaved*/)
1087 fHdr2Valid = true;
1088 }
1089
1090 /* Determine the current header. */
1091 if (fHdr1Valid != fHdr2Valid)
1092 {
1093 /* Only one header is valid - use it. */
1094 rc = vhdxLoadHeader(pImage, fHdr1Valid ? pHdr1 : pHdr2);
1095 }
1096 else if (!fHdr1Valid && !fHdr2Valid)
1097 {
1098 /* Crap, both headers are corrupt, refuse to load the image. */
1099 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1100 "VHDX: Can not load the image because both headers are corrupt");
1101 }
1102 else
1103 {
1104 /* Both headers are valid. Use the sequence number to find the current one. */
1105 if (pHdr1->u64SequenceNumber > pHdr2->u64SequenceNumber)
1106 rc = vhdxLoadHeader(pImage, pHdr1);
1107 else
1108 rc = vhdxLoadHeader(pImage, pHdr2);
1109 }
1110 }
1111 else
1112 rc = vdIfError(pImage->pIfError, VERR_NO_MEMORY, RT_SRC_POS,
1113 "VHDX: Out of memory while allocating memory for the header");
1114
1115 if (pHdr1)
1116 RTMemFree(pHdr1);
1117 if (pHdr2)
1118 RTMemFree(pHdr2);
1119
1120 LogFlowFunc(("returns rc=%Rrc\n", rc));
1121 return rc;
1122}
1123
1124/**
1125 * Loads the BAT region.
1126 *
1127 * @returns VBox status code.
1128 * @param pImage Image instance data.
1129 * @param offRegion Start offset of the region.
1130 * @param cbRegion Size of the region.
1131 */
1132static int vhdxLoadBatRegion(PVHDXIMAGE pImage, uint64_t offRegion,
1133 size_t cbRegion)
1134{
1135 int rc = VINF_SUCCESS;
1136 uint32_t cDataBlocks;
1137 uint32_t uChunkRatio;
1138 uint32_t cSectorBitmapBlocks;
1139 uint32_t cBatEntries;
1140 uint32_t cbBatEntries;
1141 PVhdxBatEntry paBatEntries = NULL;
1142
1143 LogFlowFunc(("pImage=%#p\n", pImage));
1144
1145 /* Calculate required values first. */
1146 uChunkRatio = (RT_BIT_64(23) * pImage->cbLogicalSector) / pImage->cbBlock;
1147 cDataBlocks = pImage->cbSize / pImage->cbBlock;
1148 if (pImage->cbSize % pImage->cbBlock)
1149 cDataBlocks++;
1150
1151 cSectorBitmapBlocks = cDataBlocks / uChunkRatio;
1152 if (cDataBlocks % uChunkRatio)
1153 cSectorBitmapBlocks++;
1154
1155 cBatEntries = cDataBlocks + (cDataBlocks - 1)/uChunkRatio;
1156 cbBatEntries = cBatEntries * sizeof(VhdxBatEntry);
1157
1158 if (cbBatEntries <= cbRegion)
1159 {
1160 /*
1161 * Load the complete BAT region first, convert to host endianess and process
1162 * it afterwards. The SB entries can be removed because they are not needed yet.
1163 */
1164 paBatEntries = (PVhdxBatEntry)RTMemAlloc(cbBatEntries);
1165 if (paBatEntries)
1166 {
1167 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offRegion,
1168 paBatEntries, cbBatEntries, NULL);
1169 if (RT_SUCCESS(rc))
1170 {
1171 vhdxConvBatTableEndianess(VHDXECONV_F2H, paBatEntries, paBatEntries,
1172 cBatEntries);
1173
1174 /* Go through the table and validate it. */
1175 for (unsigned i = 0; i < cBatEntries; i++)
1176 {
1177 if ( i != 0
1178 && (i % uChunkRatio) == 0)
1179 {
1180 /* Sector bitmap block. */
1181 if ( VHDX_BAT_ENTRY_GET_STATE(paBatEntries[i].u64BatEntry)
1182 != VHDX_BAT_ENTRY_SB_BLOCK_NOT_PRESENT)
1183 {
1184 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1185 "VHDX: Sector bitmap block at entry %u of image \'%s\' marked as present, violation of the specification",
1186 i, pImage->pszFilename);
1187 break;
1188 }
1189 }
1190 else
1191 {
1192 /* Payload block. */
1193 if ( VHDX_BAT_ENTRY_GET_STATE(paBatEntries[i].u64BatEntry)
1194 == VHDX_BAT_ENTRY_PAYLOAD_BLOCK_PARTIALLY_PRESENT)
1195 {
1196 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1197 "VHDX: Payload block at entry %u of image \'%s\' marked as partially present, violation of the specification",
1198 i, pImage->pszFilename);
1199 break;
1200 }
1201 }
1202 }
1203
1204 if (RT_SUCCESS(rc))
1205 {
1206 pImage->paBat = paBatEntries;
1207 pImage->uChunkRatio = uChunkRatio;
1208 }
1209 }
1210 else
1211 rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
1212 "VHDX: Error reading the BAT from image \'%s\'",
1213 pImage->pszFilename);
1214 }
1215 else
1216 rc = vdIfError(pImage->pIfError, VERR_NO_MEMORY, RT_SRC_POS,
1217 "VHDX: Out of memory allocating memory for %u BAT entries of image \'%s\'",
1218 cBatEntries);
1219 }
1220 else
1221 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1222 "VHDX: Mismatch between calculated number of BAT entries and region size (expected %u got %u) for image \'%s\'",
1223 cbBatEntries, cbRegion, pImage->pszFilename);
1224
1225 if ( RT_FAILURE(rc)
1226 && paBatEntries)
1227 RTMemFree(paBatEntries);
1228
1229 LogFlowFunc(("returns rc=%Rrc\n", rc));
1230 return rc;
1231}
1232
1233/**
1234 * Load the file parameters metadata item from the file.
1235 *
1236 * @returns VBox status code.
1237 * @param pImage Image instance data.
1238 * @param offItem File offset where the data is stored.
1239 * @param cbItem Size of the item in the file.
1240 */
1241static int vhdxLoadFileParametersMetadata(PVHDXIMAGE pImage, uint64_t offItem, size_t cbItem)
1242{
1243 int rc = VINF_SUCCESS;
1244
1245 LogFlowFunc(("pImage=%#p offItem=%llu cbItem=%zu\n", pImage, offItem, cbItem));
1246
1247 if (cbItem != sizeof(VhdxFileParameters))
1248 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1249 "VHDX: File parameters item size mismatch (expected %u got %zu) in image \'%s\'",
1250 sizeof(VhdxFileParameters), cbItem, pImage->pszFilename);
1251 else
1252 {
1253 VhdxFileParameters FileParameters;
1254
1255 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offItem,
1256 &FileParameters, sizeof(FileParameters), NULL);
1257 if (RT_SUCCESS(rc))
1258 {
1259 vhdxConvFileParamsEndianess(VHDXECONV_F2H, &FileParameters, &FileParameters);
1260 pImage->cbBlock = FileParameters.u32BlockSize;
1261
1262 /* @todo: No support for differencing images yet. */
1263 if (FileParameters.u32Flags & VHDX_FILE_PARAMETERS_FLAGS_HAS_PARENT)
1264 rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
1265 "VHDX: Image \'%s\' is a differencing image which is not supported yet",
1266 pImage->pszFilename);
1267 }
1268 else
1269 rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
1270 "VHDX: Reading the file parameters metadata item from image \'%s\' failed",
1271 pImage->pszFilename);
1272 }
1273
1274 LogFlowFunc(("returns rc=%Rrc\n", rc));
1275 return rc;
1276}
1277
1278/**
1279 * Load the virtual disk size metadata item from the file.
1280 *
1281 * @returns VBox status code.
1282 * @param pImage Image instance data.
1283 * @param offItem File offset where the data is stored.
1284 * @param cbItem Size of the item in the file.
1285 */
1286static int vhdxLoadVDiskSizeMetadata(PVHDXIMAGE pImage, uint64_t offItem, size_t cbItem)
1287{
1288 int rc = VINF_SUCCESS;
1289
1290 LogFlowFunc(("pImage=%#p offItem=%llu cbItem=%zu\n", pImage, offItem, cbItem));
1291
1292 if (cbItem != sizeof(VhdxVDiskSize))
1293 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1294 "VHDX: Virtual disk size item size mismatch (expected %u got %zu) in image \'%s\'",
1295 sizeof(VhdxVDiskSize), cbItem, pImage->pszFilename);
1296 else
1297 {
1298 VhdxVDiskSize VDiskSize;
1299
1300 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offItem,
1301 &VDiskSize, sizeof(VDiskSize), NULL);
1302 if (RT_SUCCESS(rc))
1303 {
1304 vhdxConvVDiskSizeEndianess(VHDXECONV_F2H, &VDiskSize, &VDiskSize);
1305 pImage->cbSize = VDiskSize.u64VDiskSize;
1306 }
1307 else
1308 rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
1309 "VHDX: Reading the virtual disk size metadata item from image \'%s\' failed",
1310 pImage->pszFilename);
1311 }
1312
1313 LogFlowFunc(("returns rc=%Rrc\n", rc));
1314 return rc;
1315}
1316
1317/**
1318 * Load the logical sector size metadata item from the file.
1319 *
1320 * @returns VBox status code.
1321 * @param pImage Image instance data.
1322 * @param offItem File offset where the data is stored.
1323 * @param cbItem Size of the item in the file.
1324 */
1325static int vhdxLoadVDiskLogSectorSizeMetadata(PVHDXIMAGE pImage, uint64_t offItem, size_t cbItem)
1326{
1327 int rc = VINF_SUCCESS;
1328
1329 LogFlowFunc(("pImage=%#p offItem=%llu cbItem=%zu\n", pImage, offItem, cbItem));
1330
1331 if (cbItem != sizeof(VhdxVDiskLogicalSectorSize))
1332 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1333 "VHDX: Virtual disk logical sector size item size mismatch (expected %u got %zu) in image \'%s\'",
1334 sizeof(VhdxVDiskLogicalSectorSize), cbItem, pImage->pszFilename);
1335 else
1336 {
1337 VhdxVDiskLogicalSectorSize VDiskLogSectSize;
1338
1339 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offItem,
1340 &VDiskLogSectSize, sizeof(VDiskLogSectSize), NULL);
1341 if (RT_SUCCESS(rc))
1342 {
1343 vhdxConvVDiskLogSectSizeEndianess(VHDXECONV_F2H, &VDiskLogSectSize,
1344 &VDiskLogSectSize);
1345 pImage->cbLogicalSector = VDiskLogSectSize.u32LogicalSectorSize;
1346 }
1347 else
1348 rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
1349 "VHDX: Reading the virtual disk logical sector size metadata item from image \'%s\' failed",
1350 pImage->pszFilename);
1351 }
1352
1353 LogFlowFunc(("returns rc=%Rrc\n", rc));
1354 return rc;
1355}
1356
1357/**
1358 * Loads the metadata region.
1359 *
1360 * @returns VBox status code.
1361 * @param pImage Image instance data.
1362 * @param offRegion Start offset of the region.
1363 * @param cbRegion Size of the region.
1364 */
1365static int vhdxLoadMetadataRegion(PVHDXIMAGE pImage, uint64_t offRegion,
1366 size_t cbRegion)
1367{
1368 VhdxMetadataTblHdr MetadataTblHdr;
1369 int rc = VINF_SUCCESS;
1370
1371 LogFlowFunc(("pImage=%#p\n", pImage));
1372
1373 /* Load the header first. */
1374 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offRegion,
1375 &MetadataTblHdr, sizeof(MetadataTblHdr), NULL);
1376 if (RT_SUCCESS(rc))
1377 {
1378 vhdxConvMetadataTblHdrEndianess(VHDXECONV_F2H, &MetadataTblHdr, &MetadataTblHdr);
1379
1380 /* Validate structure. */
1381 if (MetadataTblHdr.u64Signature != VHDX_METADATA_TBL_HDR_SIGNATURE)
1382 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1383 "VHDX: Incorrect metadata table header signature for image \'%s\'",
1384 pImage->pszFilename);
1385 else if (MetadataTblHdr.u16EntryCount > VHDX_METADATA_TBL_HDR_ENTRY_COUNT_MAX)
1386 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1387 "VHDX: Incorrect entry count in metadata table header of image \'%s\'",
1388 pImage->pszFilename);
1389 else if (cbRegion < (MetadataTblHdr.u16EntryCount * sizeof(VhdxMetadataTblEntry) + sizeof(VhdxMetadataTblHdr)))
1390 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1391 "VHDX: Metadata table of image \'%s\' exceeds region size",
1392 pImage->pszFilename);
1393
1394 if (RT_SUCCESS(rc))
1395 {
1396 uint64_t offMetadataTblEntry = offRegion + sizeof(VhdxMetadataTblHdr);
1397
1398 for (unsigned i = 0; i < MetadataTblHdr.u16EntryCount; i++)
1399 {
1400 uint64_t offMetadataItem = 0;
1401 VHDXMETADATAITEM enmMetadataItem = VHDXMETADATAITEM_UNKNOWN;
1402 VhdxMetadataTblEntry MetadataTblEntry;
1403
1404 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offMetadataTblEntry,
1405 &MetadataTblEntry, sizeof(MetadataTblEntry), NULL);
1406 if (RT_FAILURE(rc))
1407 {
1408 rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
1409 "VHDX: Reading metadata table entry from image \'%s\' failed",
1410 pImage->pszFilename);
1411 break;
1412 }
1413
1414 vhdxConvMetadataTblEntryEndianess(VHDXECONV_F2H, &MetadataTblEntry, &MetadataTblEntry);
1415
1416 /* Check whether the flags match the expectations. */
1417 for (unsigned idxProp = 0; idxProp < RT_ELEMENTS(s_aVhdxMetadataItemProps); idxProp++)
1418 {
1419 if (!RTUuidCompareStr(&MetadataTblEntry.UuidItem,
1420 s_aVhdxMetadataItemProps[idxProp].pszItemUuid))
1421 {
1422 if ( !!(MetadataTblEntry.u32Flags & VHDX_METADATA_TBL_ENTRY_FLAGS_IS_USER)
1423 != s_aVhdxMetadataItemProps[idxProp].fIsUser)
1424 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1425 "VHDX: User flag of metadata item does not meet expectations \'%s\'",
1426 pImage->pszFilename);
1427 else if ( !!(MetadataTblEntry.u32Flags & VHDX_METADATA_TBL_ENTRY_FLAGS_IS_VDISK)
1428 != s_aVhdxMetadataItemProps[idxProp].fIsVDisk)
1429 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1430 "VHDX: Virtual disk flag of metadata item does not meet expectations \'%s\'",
1431 pImage->pszFilename);
1432 else if ( !!(MetadataTblEntry.u32Flags & VHDX_METADATA_TBL_ENTRY_FLAGS_IS_REQUIRED)
1433 != s_aVhdxMetadataItemProps[idxProp].fIsRequired)
1434 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1435 "VHDX: Required flag of metadata item does not meet expectations \'%s\'",
1436 pImage->pszFilename);
1437 else
1438 enmMetadataItem = s_aVhdxMetadataItemProps[idxProp].enmMetadataItem;
1439
1440 break;
1441 }
1442 }
1443
1444 if (RT_FAILURE(rc))
1445 break;
1446
1447 offMetadataItem = offRegion + MetadataTblEntry.u32Offset;
1448
1449 switch (enmMetadataItem)
1450 {
1451 case VHDXMETADATAITEM_FILE_PARAMS:
1452 {
1453 rc = vhdxLoadFileParametersMetadata(pImage, offMetadataItem,
1454 MetadataTblEntry.u32Length);
1455 break;
1456 }
1457 case VHDXMETADATAITEM_VDISK_SIZE:
1458 {
1459 rc = vhdxLoadVDiskSizeMetadata(pImage, offMetadataItem,
1460 MetadataTblEntry.u32Length);
1461 break;
1462 }
1463 case VHDXMETADATAITEM_PAGE83_DATA:
1464 {
1465 /*
1466 * Nothing to do here for now (marked as required but
1467 * there is no API to pass this information to the caller)
1468 * so far.
1469 */
1470 break;
1471 }
1472 case VHDXMETADATAITEM_LOGICAL_SECTOR_SIZE:
1473 {
1474 rc = vhdxLoadVDiskLogSectorSizeMetadata(pImage, offMetadataItem,
1475 MetadataTblEntry.u32Length);
1476 break;
1477 }
1478 case VHDXMETADATAITEM_PHYSICAL_SECTOR_SIZE:
1479 {
1480 /*
1481 * Nothing to do here for now (marked as required but
1482 * there is no API to pass this information to the caller)
1483 * so far.
1484 */
1485 break;
1486 }
1487 case VHDXMETADATAITEM_PARENT_LOCATOR:
1488 {
1489 rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
1490 "VHDX: Image \'%s\' is a differencing image which is not supported yet",
1491 pImage->pszFilename);
1492 break;
1493 }
1494 case VHDXMETADATAITEM_UNKNOWN:
1495 default:
1496 if (MetadataTblEntry.u32Flags & VHDX_METADATA_TBL_ENTRY_FLAGS_IS_REQUIRED)
1497 rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
1498 "VHDX: Unsupported but required metadata item in image \'%s\'",
1499 pImage->pszFilename);
1500 }
1501
1502 if (RT_FAILURE(rc))
1503 break;
1504
1505 offMetadataTblEntry += sizeof(MetadataTblEntry);
1506 }
1507 }
1508 }
1509 else
1510 rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
1511 "VHDX: Reading the metadata table header for image \'%s\' failed",
1512 pImage->pszFilename);
1513
1514 LogFlowFunc(("returns rc=%Rrc\n", rc));
1515 return rc;
1516}
1517
1518/**
1519 * Loads the region table and the associated regions.
1520 *
1521 * @returns VBox status code.
1522 * @param pImage Image instance data.
1523 */
1524static int vhdxLoadRegionTable(PVHDXIMAGE pImage)
1525{
1526 uint8_t *pbRegionTbl = NULL;
1527 int rc = VINF_SUCCESS;
1528
1529 LogFlowFunc(("pImage=%#p\n", pImage));
1530
1531 /* Load the complete region table into memory. */
1532 pbRegionTbl = (uint8_t *)RTMemTmpAlloc(VHDX_REGION_TBL_SIZE_MAX);
1533 if (pbRegionTbl)
1534 {
1535 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, VHDX_REGION_TBL_HDR_OFFSET,
1536 pbRegionTbl, VHDX_REGION_TBL_SIZE_MAX, NULL);
1537 if (RT_SUCCESS(rc))
1538 {
1539 PVhdxRegionTblHdr pRegionTblHdr;
1540 VhdxRegionTblHdr RegionTblHdr;
1541 uint32_t u32ChkSumSaved = 0;
1542 uint32_t u32ChkSum = 0;
1543
1544 /*
1545 * Copy the region table header to a dedicated structure where we can
1546 * convert it to host endianess.
1547 */
1548 memcpy(&RegionTblHdr, pbRegionTbl, sizeof(RegionTblHdr));
1549 vhdxConvRegionTblHdrEndianess(VHDXECONV_F2H, &RegionTblHdr, &RegionTblHdr);
1550
1551 /* Set checksum field to 0 during crc computation. */
1552 pRegionTblHdr = (PVhdxRegionTblHdr)pbRegionTbl;
1553 pRegionTblHdr->u32Checksum = 0;
1554
1555 /* Verify the region table integrity. */
1556 //u32ChkSum = RTCrc32C(pbRegionTbl, VHDX_REGION_TBL_SIZE_MAX);
1557
1558 if (RegionTblHdr.u32Signature != VHDX_REGION_TBL_HDR_SIGNATURE)
1559 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1560 "VHDX: Invalid signature for region table header of image \'%s\'",
1561 pImage->pszFilename);
1562#if 0
1563 else if (u32ChkSum != RegionTblHdr.u32Checksum)
1564 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1565 "VHDX: CRC32 checksum mismatch for the region table of image \'%s\' (expected %#x got %#x)",
1566 pImage->pszFilename, RegionTblHdr.u32Checksum, u32ChkSum);
1567#endif
1568 else if (RegionTblHdr.u32EntryCount > VHDX_REGION_TBL_HDR_ENTRY_COUNT_MAX)
1569 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1570 "VHDX: Invalid entry count field in the region table header of image \'%s\'",
1571 pImage->pszFilename);
1572
1573 if (RT_SUCCESS(rc))
1574 {
1575 /* Parse the region table entries. */
1576 PVhdxRegionTblEntry pRegTblEntry = (PVhdxRegionTblEntry)(pbRegionTbl + sizeof(VhdxRegionTblHdr));
1577 VhdxRegionTblEntry RegTblEntryBat; /**<< BAT region table entry. */
1578 bool fBatRegPresent = false;
1579
1580 for (unsigned i = 0; i < RegionTblHdr.u32EntryCount; i++)
1581 {
1582 vhdxConvRegionTblEntryEndianess(VHDXECONV_F2H, pRegTblEntry, pRegTblEntry);
1583
1584 /* Check the uuid for known regions. */
1585 if (!RTUuidCompareStr(&pRegTblEntry->UuidObject, VHDX_REGION_TBL_ENTRY_UUID_BAT))
1586 {
1587 /*
1588 * Save the BAT region and process it later.
1589 * It may come before the metadata region but needs the block size.
1590 */
1591 if (pRegTblEntry->u32Flags & VHDX_REGION_TBL_ENTRY_FLAGS_IS_REQUIRED)
1592 {
1593 fBatRegPresent = true;
1594 RegTblEntryBat.u32Length = pRegTblEntry->u32Length;
1595 RegTblEntryBat.u64FileOffset = pRegTblEntry->u64FileOffset;
1596 }
1597 else
1598 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1599 "VHDX: BAT region not marked as required in image \'%s\'",
1600 pImage->pszFilename);
1601 }
1602 else if (!RTUuidCompareStr(&pRegTblEntry->UuidObject, VHDX_REGION_TBL_ENTRY_UUID_METADATA))
1603 {
1604 if (pRegTblEntry->u32Flags & VHDX_REGION_TBL_ENTRY_FLAGS_IS_REQUIRED)
1605 rc = vhdxLoadMetadataRegion(pImage, pRegTblEntry->u64FileOffset, pRegTblEntry->u32Length);
1606 else
1607 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1608 "VHDX: Metadata region not marked as required in image \'%s\'",
1609 pImage->pszFilename);
1610 }
1611 else if (pRegTblEntry->u32Flags & VHDX_REGION_TBL_ENTRY_FLAGS_IS_REQUIRED)
1612 {
1613 /* The region is not known but marked as required, fail to load the image. */
1614 rc = vdIfError(pImage->pIfError, VERR_NOT_SUPPORTED, RT_SRC_POS,
1615 "VHDX: Unknown required region in image \'%s\'",
1616 pImage->pszFilename);
1617 }
1618
1619 if (RT_FAILURE(rc))
1620 break;
1621
1622 pRegTblEntry++;
1623 }
1624
1625 if (fBatRegPresent)
1626 rc = vhdxLoadBatRegion(pImage, RegTblEntryBat.u64FileOffset, RegTblEntryBat.u32Length);
1627 else
1628 rc = vdIfError(pImage->pIfError, VERR_VD_GEN_INVALID_HEADER, RT_SRC_POS,
1629 "VHDX: BAT region in image \'%s\' is missing",
1630 pImage->pszFilename);
1631 }
1632 }
1633 else
1634 rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS,
1635 "VHDX: Reading the region table for image \'%s\' failed",
1636 pImage->pszFilename);
1637 }
1638 else
1639 rc = vdIfError(pImage->pIfError, VERR_NO_MEMORY, RT_SRC_POS,
1640 "VHDX: Out of memory allocating memory for the region table of image \'%s\'",
1641 pImage->pszFilename);
1642
1643 if (pbRegionTbl)
1644 RTMemTmpFree(pbRegionTbl);
1645
1646 LogFlowFunc(("returns rc=%Rrc\n", rc));
1647 return rc;
1648}
1649
1650/**
1651 * Internal: Open an image, constructing all necessary data structures.
1652 */
1653static int vhdxOpenImage(PVHDXIMAGE pImage, unsigned uOpenFlags)
1654{
1655 uint64_t cbFile = 0;
1656 VhdxFileIdentifier FileIdentifier;
1657 int rc = VINF_SUCCESS;
1658
1659 LogFlowFunc(("pImage=%#p uOpenFlags=%#x\n", pImage, uOpenFlags));
1660 pImage->uOpenFlags = uOpenFlags;
1661
1662 pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk);
1663 pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage);
1664 AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER);
1665
1666#if 0
1667 /* Refuse write access, it is not implemented so far. */
1668 if (!(uOpenFlags & VD_OPEN_FLAGS_READONLY))
1669 return VERR_NOT_SUPPORTED;
1670#endif
1671
1672 /*
1673 * Open the image.
1674 */
1675 rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename,
1676 VDOpenFlagsToFileOpenFlags(uOpenFlags,
1677 false /* fCreate */),
1678 &pImage->pStorage);
1679
1680 /* Do NOT signal an appropriate error here, as the VD layer has the
1681 * choice of retrying the open if it failed. */
1682 if (RT_SUCCESS(rc))
1683 rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &cbFile);
1684
1685 if (RT_SUCCESS(rc))
1686 {
1687 if (cbFile > sizeof(FileIdentifier))
1688 {
1689 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, VHDX_FILE_IDENTIFIER_OFFSET,
1690 &FileIdentifier, sizeof(FileIdentifier), NULL);
1691 if (RT_SUCCESS(rc))
1692 {
1693 vhdxConvFileIdentifierEndianess(VHDXECONV_F2H, &FileIdentifier,
1694 &FileIdentifier);
1695 if (FileIdentifier.u64Signature != VHDX_FILE_IDENTIFIER_SIGNATURE)
1696 rc = VERR_VD_GEN_INVALID_HEADER;
1697 else
1698 rc = vhdxFindAndLoadCurrentHeader(pImage);
1699
1700 /* Load the region table. */
1701 if (RT_SUCCESS(rc))
1702 rc = vhdxLoadRegionTable(pImage);
1703 }
1704 }
1705 else
1706 rc = VERR_VD_GEN_INVALID_HEADER;
1707 }
1708
1709 if (RT_FAILURE(rc))
1710 vhdxFreeImage(pImage, false);
1711
1712 LogFlowFunc(("returns rc=%Rrc\n", rc));
1713 return rc;
1714}
1715
1716
1717/** @copydoc VBOXHDDBACKEND::pfnCheckIfValid */
1718static int vhdxCheckIfValid(const char *pszFilename, PVDINTERFACE pVDIfsDisk,
1719 PVDINTERFACE pVDIfsImage, VDTYPE *penmType)
1720{
1721 LogFlowFunc(("pszFilename=\"%s\" pVDIfsDisk=%#p pVDIfsImage=%#p\n", pszFilename, pVDIfsDisk, pVDIfsImage));
1722 PVDIOSTORAGE pStorage = NULL;
1723 uint64_t cbFile;
1724 int rc = VINF_SUCCESS;
1725 VhdxFileIdentifier FileIdentifier;
1726
1727 PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage);
1728 AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER);
1729
1730 if ( !VALID_PTR(pszFilename)
1731 || !*pszFilename)
1732 rc = VERR_INVALID_PARAMETER;
1733 else
1734 {
1735 /*
1736 * Open the file and read the file identifier.
1737 */
1738 rc = vdIfIoIntFileOpen(pIfIo, pszFilename,
1739 VDOpenFlagsToFileOpenFlags(VD_OPEN_FLAGS_READONLY,
1740 false /* fCreate */),
1741 &pStorage);
1742 if (RT_SUCCESS(rc))
1743 rc = vdIfIoIntFileGetSize(pIfIo, pStorage, &cbFile);
1744
1745 if (RT_SUCCESS(rc))
1746 {
1747 if (cbFile > sizeof(FileIdentifier))
1748 {
1749 rc = vdIfIoIntFileReadSync(pIfIo, pStorage, VHDX_FILE_IDENTIFIER_OFFSET,
1750 &FileIdentifier, sizeof(FileIdentifier), NULL);
1751 if (RT_SUCCESS(rc))
1752 {
1753 vhdxConvFileIdentifierEndianess(VHDXECONV_F2H, &FileIdentifier,
1754 &FileIdentifier);
1755 if (FileIdentifier.u64Signature != VHDX_FILE_IDENTIFIER_SIGNATURE)
1756 rc = VERR_VD_GEN_INVALID_HEADER;
1757 else
1758 *penmType = VDTYPE_HDD;
1759 }
1760 }
1761 else
1762 rc = VERR_VD_GEN_INVALID_HEADER;
1763 }
1764
1765 if (pStorage)
1766 vdIfIoIntFileClose(pIfIo, pStorage);
1767 }
1768
1769 LogFlowFunc(("returns %Rrc\n", rc));
1770 return rc;
1771}
1772
1773/** @copydoc VBOXHDDBACKEND::pfnOpen */
1774static int vhdxOpen(const char *pszFilename, unsigned uOpenFlags,
1775 PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
1776 VDTYPE enmType, void **ppBackendData)
1777{
1778 LogFlowFunc(("pszFilename=\"%s\" uOpenFlags=%#x pVDIfsDisk=%#p pVDIfsImage=%#p ppBackendData=%#p\n", pszFilename, uOpenFlags, pVDIfsDisk, pVDIfsImage, ppBackendData));
1779 int rc;
1780 PVHDXIMAGE pImage;
1781
1782 /* Check open flags. All valid flags are supported. */
1783 if ( uOpenFlags & ~VD_OPEN_FLAGS_MASK
1784 || !VALID_PTR(pszFilename)
1785 || !*pszFilename)
1786 rc = VERR_INVALID_PARAMETER;
1787 else
1788 {
1789 pImage = (PVHDXIMAGE)RTMemAllocZ(sizeof(VHDXIMAGE));
1790 if (!pImage)
1791 rc = VERR_NO_MEMORY;
1792 else
1793 {
1794 pImage->pszFilename = pszFilename;
1795 pImage->pStorage = NULL;
1796 pImage->pVDIfsDisk = pVDIfsDisk;
1797 pImage->pVDIfsImage = pVDIfsImage;
1798
1799 rc = vhdxOpenImage(pImage, uOpenFlags);
1800 if (RT_SUCCESS(rc))
1801 *ppBackendData = pImage;
1802 else
1803 RTMemFree(pImage);
1804 }
1805 }
1806
1807 LogFlowFunc(("returns %Rrc (pBackendData=%#p)\n", rc, *ppBackendData));
1808 return rc;
1809}
1810
1811/** @copydoc VBOXHDDBACKEND::pfnRename */
1812static int vhdxRename(void *pBackendData, const char *pszFilename)
1813{
1814 LogFlowFunc(("pBackendData=%#p pszFilename=%#p\n", pBackendData, pszFilename));
1815 int rc = VINF_SUCCESS;
1816 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
1817
1818 /* Check arguments. */
1819 if ( !pImage
1820 || !pszFilename
1821 || !*pszFilename)
1822 rc = VERR_INVALID_PARAMETER;
1823 else
1824 {
1825 /* Close the image. */
1826 rc = vhdxFreeImage(pImage, false);
1827 if (RT_SUCCESS(rc))
1828 {
1829 /* Rename the file. */
1830 rc = vdIfIoIntFileMove(pImage->pIfIo, pImage->pszFilename, pszFilename, 0);
1831 if (RT_FAILURE(rc))
1832 {
1833 /* The move failed, try to reopen the original image. */
1834 int rc2 = vhdxOpenImage(pImage, pImage->uOpenFlags);
1835 if (RT_FAILURE(rc2))
1836 rc = rc2;
1837 }
1838 else
1839 {
1840 /* Update pImage with the new information. */
1841 pImage->pszFilename = pszFilename;
1842
1843 /* Open the old image with new name. */
1844 rc = vhdxOpenImage(pImage, pImage->uOpenFlags);
1845 }
1846 }
1847 }
1848
1849 LogFlowFunc(("returns %Rrc\n", rc));
1850 return rc;
1851}
1852
1853/** @copydoc VBOXHDDBACKEND::pfnClose */
1854static int vhdxClose(void *pBackendData, bool fDelete)
1855{
1856 LogFlowFunc(("pBackendData=%#p fDelete=%d\n", pBackendData, fDelete));
1857 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
1858 int rc;
1859
1860 rc = vhdxFreeImage(pImage, fDelete);
1861 RTMemFree(pImage);
1862
1863 LogFlowFunc(("returns %Rrc\n", rc));
1864 return rc;
1865}
1866
1867/** @copydoc VBOXHDDBACKEND::pfnRead */
1868static int vhdxRead(void *pBackendData, uint64_t uOffset, void *pvBuf,
1869 size_t cbToRead, size_t *pcbActuallyRead)
1870{
1871 LogFlowFunc(("pBackendData=%#p uOffset=%llu pvBuf=%#p cbToRead=%zu pcbActuallyRead=%#p\n", pBackendData, uOffset, pvBuf, cbToRead, pcbActuallyRead));
1872 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
1873 int rc = VINF_SUCCESS;
1874
1875 AssertPtr(pImage);
1876 Assert(uOffset % 512 == 0);
1877 Assert(cbToRead % 512 == 0);
1878
1879 if ( uOffset + cbToRead > pImage->cbSize
1880 || cbToRead == 0)
1881 rc = VERR_INVALID_PARAMETER;
1882 else
1883 {
1884 uint32_t idxBat = uOffset / pImage->cbBlock;
1885 uint32_t offRead = uOffset % pImage->cbBlock;
1886 uint64_t uBatEntry;
1887
1888 idxBat += idxBat / pImage->uChunkRatio; /* Add interleaving sector bitmap entries. */
1889 uBatEntry = pImage->paBat[idxBat].u64BatEntry;
1890
1891 cbToRead = RT_MIN(cbToRead, pImage->cbBlock - offRead);
1892
1893 switch (VHDX_BAT_ENTRY_GET_STATE(uBatEntry))
1894 {
1895 case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_NOT_PRESENT:
1896 case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_UNDEFINED:
1897 case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_ZERO:
1898 case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_UNMAPPED:
1899 {
1900 memset(pvBuf, 0, cbToRead);
1901 break;
1902 }
1903 case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_FULLY_PRESENT:
1904 {
1905 uint64_t offFile = VHDX_BAT_ENTRY_GET_FILE_OFFSET(uBatEntry) + offRead;
1906 rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, offFile,
1907 pvBuf, cbToRead, NULL);
1908 break;
1909 }
1910 case VHDX_BAT_ENTRY_PAYLOAD_BLOCK_PARTIALLY_PRESENT:
1911 default:
1912 rc = VERR_INVALID_PARAMETER;
1913 break;
1914 }
1915
1916 if (pcbActuallyRead)
1917 *pcbActuallyRead = cbToRead;
1918 }
1919
1920 LogFlowFunc(("returns %Rrc\n", rc));
1921 return rc;
1922}
1923
1924/** @copydoc VBOXHDDBACKEND::pfnWrite */
1925static int vhdxWrite(void *pBackendData, uint64_t uOffset, const void *pvBuf,
1926 size_t cbToWrite, size_t *pcbWriteProcess,
1927 size_t *pcbPreRead, size_t *pcbPostRead, unsigned fWrite)
1928{
1929 LogFlowFunc(("pBackendData=%#p uOffset=%llu pvBuf=%#p cbToWrite=%zu pcbWriteProcess=%#p pcbPreRead=%#p pcbPostRead=%#p\n",
1930 pBackendData, uOffset, pvBuf, cbToWrite, pcbWriteProcess, pcbPreRead, pcbPostRead));
1931 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
1932 int rc;
1933
1934 AssertPtr(pImage);
1935 Assert(uOffset % 512 == 0);
1936 Assert(cbToWrite % 512 == 0);
1937
1938 if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
1939 rc = VERR_VD_IMAGE_READ_ONLY;
1940 else if ( uOffset + cbToWrite > pImage->cbSize
1941 || cbToWrite == 0)
1942 rc = VERR_INVALID_PARAMETER;
1943 else
1944 rc = VERR_NOT_SUPPORTED;
1945
1946 LogFlowFunc(("returns %Rrc\n", rc));
1947 return rc;
1948}
1949
1950/** @copydoc VBOXHDDBACKEND::pfnFlush */
1951static int vhdxFlush(void *pBackendData)
1952{
1953 LogFlowFunc(("pBackendData=%#p\n", pBackendData));
1954 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
1955 int rc;
1956
1957 if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
1958 rc = VERR_VD_IMAGE_READ_ONLY;
1959 else
1960 rc = VERR_NOT_SUPPORTED;
1961
1962 LogFlowFunc(("returns %Rrc\n", rc));
1963 return rc;
1964}
1965
1966/** @copydoc VBOXHDDBACKEND::pfnGetVersion */
1967static unsigned vhdxGetVersion(void *pBackendData)
1968{
1969 LogFlowFunc(("pBackendData=%#p\n", pBackendData));
1970 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
1971
1972 AssertPtr(pImage);
1973
1974 if (pImage)
1975 return pImage->uVersion;
1976 else
1977 return 0;
1978}
1979
1980/** @copydoc VBOXHDDBACKEND::pfnGetSize */
1981static uint64_t vhdxGetSize(void *pBackendData)
1982{
1983 LogFlowFunc(("pBackendData=%#p\n", pBackendData));
1984 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
1985 uint64_t cb = 0;
1986
1987 AssertPtr(pImage);
1988
1989 if (pImage && pImage->pStorage)
1990 cb = pImage->cbSize;
1991
1992 LogFlowFunc(("returns %llu\n", cb));
1993 return cb;
1994}
1995
1996/** @copydoc VBOXHDDBACKEND::pfnGetFileSize */
1997static uint64_t vhdxGetFileSize(void *pBackendData)
1998{
1999 LogFlowFunc(("pBackendData=%#p\n", pBackendData));
2000 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2001 uint64_t cb = 0;
2002
2003 AssertPtr(pImage);
2004
2005 if (pImage)
2006 {
2007 uint64_t cbFile;
2008 if (pImage->pStorage)
2009 {
2010 int rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &cbFile);
2011 if (RT_SUCCESS(rc))
2012 cb = cbFile;
2013 }
2014 }
2015
2016 LogFlowFunc(("returns %lld\n", cb));
2017 return cb;
2018}
2019
2020/** @copydoc VBOXHDDBACKEND::pfnGetPCHSGeometry */
2021static int vhdxGetPCHSGeometry(void *pBackendData,
2022 PVDGEOMETRY pPCHSGeometry)
2023{
2024 LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p\n", pBackendData, pPCHSGeometry));
2025 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2026 int rc;
2027
2028 AssertPtr(pImage);
2029
2030 if (pImage)
2031 {
2032 if (pImage->PCHSGeometry.cCylinders)
2033 {
2034 *pPCHSGeometry = pImage->PCHSGeometry;
2035 rc = VINF_SUCCESS;
2036 }
2037 else
2038 rc = VERR_VD_GEOMETRY_NOT_SET;
2039 }
2040 else
2041 rc = VERR_VD_NOT_OPENED;
2042
2043 LogFlowFunc(("returns %Rrc (PCHS=%u/%u/%u)\n", rc, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
2044 return rc;
2045}
2046
2047/** @copydoc VBOXHDDBACKEND::pfnSetPCHSGeometry */
2048static int vhdxSetPCHSGeometry(void *pBackendData,
2049 PCVDGEOMETRY pPCHSGeometry)
2050{
2051 LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p PCHS=%u/%u/%u\n", pBackendData, pPCHSGeometry, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
2052 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2053 int rc = VINF_SUCCESS;
2054
2055 AssertPtr(pImage);
2056
2057 if (pImage)
2058 {
2059 if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
2060 rc = VERR_VD_IMAGE_READ_ONLY;
2061 else
2062 pImage->PCHSGeometry = *pPCHSGeometry;
2063 }
2064 else
2065 rc = VERR_VD_NOT_OPENED;
2066
2067out:
2068 LogFlowFunc(("returns %Rrc\n", rc));
2069 return rc;
2070}
2071
2072/** @copydoc VBOXHDDBACKEND::pfnGetLCHSGeometry */
2073static int vhdxGetLCHSGeometry(void *pBackendData,
2074 PVDGEOMETRY pLCHSGeometry)
2075{
2076 LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p\n", pBackendData, pLCHSGeometry));
2077 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2078 int rc = VINF_SUCCESS;
2079
2080 AssertPtr(pImage);
2081
2082 if (pImage)
2083 {
2084 if (pImage->LCHSGeometry.cCylinders)
2085 *pLCHSGeometry = pImage->LCHSGeometry;
2086 else
2087 rc = VERR_VD_GEOMETRY_NOT_SET;
2088 }
2089 else
2090 rc = VERR_VD_NOT_OPENED;
2091
2092 LogFlowFunc(("returns %Rrc (LCHS=%u/%u/%u)\n", rc, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
2093 return rc;
2094}
2095
2096/** @copydoc VBOXHDDBACKEND::pfnSetLCHSGeometry */
2097static int vhdxSetLCHSGeometry(void *pBackendData,
2098 PCVDGEOMETRY pLCHSGeometry)
2099{
2100 LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p LCHS=%u/%u/%u\n", pBackendData, pLCHSGeometry, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
2101 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2102 int rc = VINF_SUCCESS;
2103
2104 AssertPtr(pImage);
2105
2106 if (pImage)
2107 {
2108 if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
2109 rc = VERR_VD_IMAGE_READ_ONLY;
2110 else
2111 pImage->LCHSGeometry = *pLCHSGeometry;
2112 }
2113 else
2114 rc = VERR_VD_NOT_OPENED;
2115
2116 LogFlowFunc(("returns %Rrc\n", rc));
2117 return rc;
2118}
2119
2120/** @copydoc VBOXHDDBACKEND::pfnGetImageFlags */
2121static unsigned vhdxGetImageFlags(void *pBackendData)
2122{
2123 LogFlowFunc(("pBackendData=%#p\n", pBackendData));
2124 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2125 unsigned uImageFlags;
2126
2127 AssertPtr(pImage);
2128
2129 if (pImage)
2130 uImageFlags = pImage->uImageFlags;
2131 else
2132 uImageFlags = 0;
2133
2134 LogFlowFunc(("returns %#x\n", uImageFlags));
2135 return uImageFlags;
2136}
2137
2138/** @copydoc VBOXHDDBACKEND::pfnGetOpenFlags */
2139static unsigned vhdxGetOpenFlags(void *pBackendData)
2140{
2141 LogFlowFunc(("pBackendData=%#p\n", pBackendData));
2142 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2143 unsigned uOpenFlags;
2144
2145 AssertPtr(pImage);
2146
2147 if (pImage)
2148 uOpenFlags = pImage->uOpenFlags;
2149 else
2150 uOpenFlags = 0;
2151
2152 LogFlowFunc(("returns %#x\n", uOpenFlags));
2153 return uOpenFlags;
2154}
2155
2156/** @copydoc VBOXHDDBACKEND::pfnSetOpenFlags */
2157static int vhdxSetOpenFlags(void *pBackendData, unsigned uOpenFlags)
2158{
2159 LogFlowFunc(("pBackendData=%#p\n uOpenFlags=%#x", pBackendData, uOpenFlags));
2160 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2161 int rc = VINF_SUCCESS;
2162
2163 /* Image must be opened and the new flags must be valid. */
2164 if (!pImage || (uOpenFlags & ~(VD_OPEN_FLAGS_READONLY | VD_OPEN_FLAGS_INFO)))
2165 rc = VERR_INVALID_PARAMETER;
2166 else
2167 {
2168 /* Implement this operation via reopening the image. */
2169 rc = vhdxFreeImage(pImage, false);
2170 if (RT_SUCCESS(rc))
2171 rc = vhdxOpenImage(pImage, uOpenFlags);
2172 }
2173
2174 LogFlowFunc(("returns %Rrc\n", rc));
2175 return rc;
2176}
2177
2178/** @copydoc VBOXHDDBACKEND::pfnGetComment */
2179static int vhdxGetComment(void *pBackendData, char *pszComment,
2180 size_t cbComment)
2181{
2182 LogFlowFunc(("pBackendData=%#p pszComment=%#p cbComment=%zu\n", pBackendData, pszComment, cbComment));
2183 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2184 int rc;
2185
2186 AssertPtr(pImage);
2187
2188 if (pImage)
2189 rc = VERR_NOT_SUPPORTED;
2190 else
2191 rc = VERR_VD_NOT_OPENED;
2192
2193 LogFlowFunc(("returns %Rrc comment='%s'\n", rc, pszComment));
2194 return rc;
2195}
2196
2197/** @copydoc VBOXHDDBACKEND::pfnSetComment */
2198static int vhdxSetComment(void *pBackendData, const char *pszComment)
2199{
2200 LogFlowFunc(("pBackendData=%#p pszComment=\"%s\"\n", pBackendData, pszComment));
2201 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2202 int rc;
2203
2204 AssertPtr(pImage);
2205
2206 if (pImage)
2207 {
2208 if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
2209 rc = VERR_VD_IMAGE_READ_ONLY;
2210 else
2211 rc = VERR_NOT_SUPPORTED;
2212 }
2213 else
2214 rc = VERR_VD_NOT_OPENED;
2215
2216 LogFlowFunc(("returns %Rrc\n", rc));
2217 return rc;
2218}
2219
2220/** @copydoc VBOXHDDBACKEND::pfnGetUuid */
2221static int vhdxGetUuid(void *pBackendData, PRTUUID pUuid)
2222{
2223 LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
2224 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2225 int rc;
2226
2227 AssertPtr(pImage);
2228
2229 if (pImage)
2230 rc = VERR_NOT_SUPPORTED;
2231 else
2232 rc = VERR_VD_NOT_OPENED;
2233
2234 LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
2235 return rc;
2236}
2237
2238/** @copydoc VBOXHDDBACKEND::pfnSetUuid */
2239static int vhdxSetUuid(void *pBackendData, PCRTUUID pUuid)
2240{
2241 LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
2242 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2243 int rc;
2244
2245 LogFlowFunc(("%RTuuid\n", pUuid));
2246 AssertPtr(pImage);
2247
2248 if (pImage)
2249 {
2250 if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
2251 rc = VERR_NOT_SUPPORTED;
2252 else
2253 rc = VERR_VD_IMAGE_READ_ONLY;
2254 }
2255 else
2256 rc = VERR_VD_NOT_OPENED;
2257
2258 LogFlowFunc(("returns %Rrc\n", rc));
2259 return rc;
2260}
2261
2262/** @copydoc VBOXHDDBACKEND::pfnGetModificationUuid */
2263static int vhdxGetModificationUuid(void *pBackendData, PRTUUID pUuid)
2264{
2265 LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
2266 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2267 int rc;
2268
2269 AssertPtr(pImage);
2270
2271 if (pImage)
2272 rc = VERR_NOT_SUPPORTED;
2273 else
2274 rc = VERR_VD_NOT_OPENED;
2275
2276 LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
2277 return rc;
2278}
2279
2280/** @copydoc VBOXHDDBACKEND::pfnSetModificationUuid */
2281static int vhdxSetModificationUuid(void *pBackendData, PCRTUUID pUuid)
2282{
2283 LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
2284 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2285 int rc;
2286
2287 AssertPtr(pImage);
2288
2289 if (pImage)
2290 {
2291 if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
2292 rc = VERR_NOT_SUPPORTED;
2293 else
2294 rc = VERR_VD_IMAGE_READ_ONLY;
2295 }
2296 else
2297 rc = VERR_VD_NOT_OPENED;
2298
2299 LogFlowFunc(("returns %Rrc\n", rc));
2300 return rc;
2301}
2302
2303/** @copydoc VBOXHDDBACKEND::pfnGetParentUuid */
2304static int vhdxGetParentUuid(void *pBackendData, PRTUUID pUuid)
2305{
2306 LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
2307 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2308 int rc;
2309
2310 AssertPtr(pImage);
2311
2312 if (pImage)
2313 rc = VERR_NOT_SUPPORTED;
2314 else
2315 rc = VERR_VD_NOT_OPENED;
2316
2317 LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
2318 return rc;
2319}
2320
2321/** @copydoc VBOXHDDBACKEND::pfnSetParentUuid */
2322static int vhdxSetParentUuid(void *pBackendData, PCRTUUID pUuid)
2323{
2324 LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
2325 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2326 int rc;
2327
2328 AssertPtr(pImage);
2329
2330 if (pImage)
2331 {
2332 if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
2333 rc = VERR_NOT_SUPPORTED;
2334 else
2335 rc = VERR_VD_IMAGE_READ_ONLY;
2336 }
2337 else
2338 rc = VERR_VD_NOT_OPENED;
2339
2340 LogFlowFunc(("returns %Rrc\n", rc));
2341 return rc;
2342}
2343
2344/** @copydoc VBOXHDDBACKEND::pfnGetParentModificationUuid */
2345static int vhdxGetParentModificationUuid(void *pBackendData, PRTUUID pUuid)
2346{
2347 LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
2348 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2349 int rc;
2350
2351 AssertPtr(pImage);
2352
2353 if (pImage)
2354 rc = VERR_NOT_SUPPORTED;
2355 else
2356 rc = VERR_VD_NOT_OPENED;
2357
2358 LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
2359 return rc;
2360}
2361
2362/** @copydoc VBOXHDDBACKEND::pfnSetParentModificationUuid */
2363static int vhdxSetParentModificationUuid(void *pBackendData, PCRTUUID pUuid)
2364{
2365 LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
2366 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2367 int rc;
2368
2369 AssertPtr(pImage);
2370
2371 if (pImage)
2372 {
2373 if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
2374 rc = VERR_NOT_SUPPORTED;
2375 else
2376 rc = VERR_VD_IMAGE_READ_ONLY;
2377 }
2378 else
2379 rc = VERR_VD_NOT_OPENED;
2380
2381 LogFlowFunc(("returns %Rrc\n", rc));
2382 return rc;
2383}
2384
2385/** @copydoc VBOXHDDBACKEND::pfnDump */
2386static void vhdxDump(void *pBackendData)
2387{
2388 PVHDXIMAGE pImage = (PVHDXIMAGE)pBackendData;
2389
2390 AssertPtr(pImage);
2391 if (pImage)
2392 {
2393 vdIfErrorMessage(pImage->pIfError, "Header: Geometry PCHS=%u/%u/%u LCHS=%u/%u/%u cbSector=%zu\n",
2394 pImage->PCHSGeometry.cCylinders, pImage->PCHSGeometry.cHeads, pImage->PCHSGeometry.cSectors,
2395 pImage->LCHSGeometry.cCylinders, pImage->LCHSGeometry.cHeads, pImage->LCHSGeometry.cSectors,
2396 pImage->cbLogicalSector);
2397 }
2398}
2399
2400
2401VBOXHDDBACKEND g_VhdxBackend =
2402{
2403 /* pszBackendName */
2404 "VHDX",
2405 /* cbSize */
2406 sizeof(VBOXHDDBACKEND),
2407 /* uBackendCaps */
2408 VD_CAP_FILE | VD_CAP_VFS,
2409 /* paFileExtensions */
2410 s_aVhdxFileExtensions,
2411 /* paConfigInfo */
2412 NULL,
2413 /* hPlugin */
2414 NIL_RTLDRMOD,
2415 /* pfnCheckIfValid */
2416 vhdxCheckIfValid,
2417 /* pfnOpen */
2418 vhdxOpen,
2419 /* pfnCreate */
2420 NULL,
2421 /* pfnRename */
2422 vhdxRename,
2423 /* pfnClose */
2424 vhdxClose,
2425 /* pfnRead */
2426 vhdxRead,
2427 /* pfnWrite */
2428 vhdxWrite,
2429 /* pfnFlush */
2430 vhdxFlush,
2431 /* pfnGetVersion */
2432 vhdxGetVersion,
2433 /* pfnGetSize */
2434 vhdxGetSize,
2435 /* pfnGetFileSize */
2436 vhdxGetFileSize,
2437 /* pfnGetPCHSGeometry */
2438 vhdxGetPCHSGeometry,
2439 /* pfnSetPCHSGeometry */
2440 vhdxSetPCHSGeometry,
2441 /* pfnGetLCHSGeometry */
2442 vhdxGetLCHSGeometry,
2443 /* pfnSetLCHSGeometry */
2444 vhdxSetLCHSGeometry,
2445 /* pfnGetImageFlags */
2446 vhdxGetImageFlags,
2447 /* pfnGetOpenFlags */
2448 vhdxGetOpenFlags,
2449 /* pfnSetOpenFlags */
2450 vhdxSetOpenFlags,
2451 /* pfnGetComment */
2452 vhdxGetComment,
2453 /* pfnSetComment */
2454 vhdxSetComment,
2455 /* pfnGetUuid */
2456 vhdxGetUuid,
2457 /* pfnSetUuid */
2458 vhdxSetUuid,
2459 /* pfnGetModificationUuid */
2460 vhdxGetModificationUuid,
2461 /* pfnSetModificationUuid */
2462 vhdxSetModificationUuid,
2463 /* pfnGetParentUuid */
2464 vhdxGetParentUuid,
2465 /* pfnSetParentUuid */
2466 vhdxSetParentUuid,
2467 /* pfnGetParentModificationUuid */
2468 vhdxGetParentModificationUuid,
2469 /* pfnSetParentModificationUuid */
2470 vhdxSetParentModificationUuid,
2471 /* pfnDump */
2472 vhdxDump,
2473 /* pfnGetTimeStamp */
2474 NULL,
2475 /* pfnGetParentTimeStamp */
2476 NULL,
2477 /* pfnSetParentTimeStamp */
2478 NULL,
2479 /* pfnGetParentFilename */
2480 NULL,
2481 /* pfnSetParentFilename */
2482 NULL,
2483 /* pfnAsyncRead */
2484 NULL,
2485 /* pfnAsyncWrite */
2486 NULL,
2487 /* pfnAsyncFlush */
2488 NULL,
2489 /* pfnComposeLocation */
2490 genericFileComposeLocation,
2491 /* pfnComposeName */
2492 genericFileComposeName,
2493 /* pfnCompact */
2494 NULL,
2495 /* pfnResize */
2496 NULL,
2497 /* pfnDiscard */
2498 NULL,
2499 /* pfnAsyncDiscard */
2500 NULL,
2501 /* pfnRepair */
2502 NULL
2503};
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