VirtualBox

source: vbox/trunk/src/VBox/Devices/Storage/VDICore.h@ 22432

Last change on this file since 22432 was 20374, checked in by vboxsync, 16 years ago

*: s/RT_\(BEGIN|END\)_DECLS/RT_C_DECLS_\1/g
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File size: 19.9 KB
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1/* $Id: VDICore.h 20374 2009-06-08 00:43:21Z vboxsync $ */
2/** @file
3 * Virtual Disk Image (VDI), Core Code Header (internal).
4 */
5
6/*
7 * Copyright (C) 2006-2009 Sun Microsystems, Inc.
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 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
18 * Clara, CA 95054 USA or visit http://www.sun.com if you need
19 * additional information or have any questions.
20 */
21
22#ifndef __VDICore_h__
23
24
25/*******************************************************************************
26* Header Files *
27*******************************************************************************/
28#ifndef VBOX_VDICORE_VD
29#include <VBox/VBoxHDD.h>
30#else /* VBOX_VDICORE_VD */
31#include <VBox/VBoxHDD.h>
32#endif /* VBOX_VDICORE_VD */
33#include <VBox/pdm.h>
34#include <VBox/mm.h>
35#include <VBox/err.h>
36
37#include <VBox/log.h>
38#include <iprt/alloc.h>
39#include <iprt/assert.h>
40#include <iprt/uuid.h>
41#include <iprt/file.h>
42#include <iprt/string.h>
43#include <iprt/asm.h>
44
45
46/*******************************************************************************
47* Constants And Macros, Structures and Typedefs *
48*******************************************************************************/
49
50/** Image info, not handled anyhow.
51 * Must be less than 64 bytes in length, including the trailing 0.
52 */
53#define VDI_IMAGE_FILE_INFO "<<< Sun VirtualBox Disk Image >>>\n"
54
55/** The Sector size.
56 * Currently we support only 512 bytes sectors.
57 */
58#define VDI_GEOMETRY_SECTOR_SIZE (512)
59/** 512 = 2^^9 */
60#define VDI_GEOMETRY_SECTOR_SHIFT (9)
61
62/**
63 * Harddisk geometry.
64 */
65#pragma pack(1)
66typedef struct VDIDISKGEOMETRY
67{
68 /** Cylinders. */
69 uint32_t cCylinders;
70 /** Heads. */
71 uint32_t cHeads;
72 /** Sectors per track. */
73 uint32_t cSectors;
74 /** Sector size. (bytes per sector) */
75 uint32_t cbSector;
76} VDIDISKGEOMETRY, *PVDIDISKGEOMETRY;
77#pragma pack()
78
79/** Image signature. */
80#define VDI_IMAGE_SIGNATURE (0xbeda107f)
81
82/**
83 * Pre-Header to be stored in image file - used for version control.
84 */
85#pragma pack(1)
86typedef struct VDIPREHEADER
87{
88 /** Just text info about image type, for eyes only. */
89 char szFileInfo[64];
90 /** The image signature (VDI_IMAGE_SIGNATURE). */
91 uint32_t u32Signature;
92 /** The image version (VDI_IMAGE_VERSION). */
93 uint32_t u32Version;
94} VDIPREHEADER, *PVDIPREHEADER;
95#pragma pack()
96
97/**
98 * Size of szComment field of HDD image header.
99 */
100#define VDI_IMAGE_COMMENT_SIZE 256
101
102/**
103 * Header to be stored in image file, VDI_IMAGE_VERSION_MAJOR = 0.
104 * Prepended by VDIPREHEADER.
105 */
106#pragma pack(1)
107typedef struct VDIHEADER0
108{
109 /** The image type (VDI_IMAGE_TYPE_*). */
110 uint32_t u32Type;
111 /** Image flags (VDI_IMAGE_FLAGS_*). */
112 uint32_t fFlags;
113 /** Image comment. (UTF-8) */
114 char szComment[VDI_IMAGE_COMMENT_SIZE];
115 /** Legacy image geometry (previous code stored PCHS there). */
116 VDIDISKGEOMETRY LegacyGeometry;
117 /** Size of disk (in bytes). */
118 uint64_t cbDisk;
119 /** Block size. (For instance VDI_IMAGE_BLOCK_SIZE.) */
120 uint32_t cbBlock;
121 /** Number of blocks. */
122 uint32_t cBlocks;
123 /** Number of allocated blocks. */
124 uint32_t cBlocksAllocated;
125 /** UUID of image. */
126 RTUUID uuidCreate;
127 /** UUID of image's last modification. */
128 RTUUID uuidModify;
129 /** Only for secondary images - UUID of primary image. */
130 RTUUID uuidLinkage;
131} VDIHEADER0, *PVDIHEADER0;
132#pragma pack()
133
134/**
135 * Header to be stored in image file, VDI_IMAGE_VERSION_MAJOR = 1,
136 * VDI_IMAGE_VERSION_MINOR = 1. Prepended by VDIPREHEADER.
137 */
138#pragma pack(1)
139typedef struct VDIHEADER1
140{
141 /** Size of this structure in bytes. */
142 uint32_t cbHeader;
143 /** The image type (VDI_IMAGE_TYPE_*). */
144 uint32_t u32Type;
145 /** Image flags (VDI_IMAGE_FLAGS_*). */
146 uint32_t fFlags;
147 /** Image comment. (UTF-8) */
148 char szComment[VDI_IMAGE_COMMENT_SIZE];
149 /** Offset of Blocks array from the begining of image file.
150 * Should be sector-aligned for HDD access optimization. */
151 uint32_t offBlocks;
152 /** Offset of image data from the begining of image file.
153 * Should be sector-aligned for HDD access optimization. */
154 uint32_t offData;
155 /** Legacy image geometry (previous code stored PCHS there). */
156 VDIDISKGEOMETRY LegacyGeometry;
157 /** Was BIOS HDD translation mode, now unused. */
158 uint32_t u32Dummy;
159 /** Size of disk (in bytes). */
160 uint64_t cbDisk;
161 /** Block size. (For instance VDI_IMAGE_BLOCK_SIZE.) Should be a power of 2! */
162 uint32_t cbBlock;
163 /** Size of additional service information of every data block.
164 * Prepended before block data. May be 0.
165 * Should be a power of 2 and sector-aligned for optimization reasons. */
166 uint32_t cbBlockExtra;
167 /** Number of blocks. */
168 uint32_t cBlocks;
169 /** Number of allocated blocks. */
170 uint32_t cBlocksAllocated;
171 /** UUID of image. */
172 RTUUID uuidCreate;
173 /** UUID of image's last modification. */
174 RTUUID uuidModify;
175 /** Only for secondary images - UUID of previous image. */
176 RTUUID uuidLinkage;
177 /** Only for secondary images - UUID of previous image's last modification. */
178 RTUUID uuidParentModify;
179} VDIHEADER1, *PVDIHEADER1;
180#pragma pack()
181
182/**
183 * Header to be stored in image file, VDI_IMAGE_VERSION_MAJOR = 1,
184 * VDI_IMAGE_VERSION_MINOR = 1, the slightly changed variant necessary as the
185 * old released code doesn't support changing the minor version at all.
186 */
187#pragma pack(1)
188typedef struct VDIHEADER1PLUS
189{
190 /** Size of this structure in bytes. */
191 uint32_t cbHeader;
192 /** The image type (VDI_IMAGE_TYPE_*). */
193 uint32_t u32Type;
194 /** Image flags (VDI_IMAGE_FLAGS_*). */
195 uint32_t fFlags;
196 /** Image comment. (UTF-8) */
197 char szComment[VDI_IMAGE_COMMENT_SIZE];
198 /** Offset of Blocks array from the begining of image file.
199 * Should be sector-aligned for HDD access optimization. */
200 uint32_t offBlocks;
201 /** Offset of image data from the begining of image file.
202 * Should be sector-aligned for HDD access optimization. */
203 uint32_t offData;
204 /** Legacy image geometry (previous code stored PCHS there). */
205 VDIDISKGEOMETRY LegacyGeometry;
206 /** Was BIOS HDD translation mode, now unused. */
207 uint32_t u32Dummy;
208 /** Size of disk (in bytes). */
209 uint64_t cbDisk;
210 /** Block size. (For instance VDI_IMAGE_BLOCK_SIZE.) Should be a power of 2! */
211 uint32_t cbBlock;
212 /** Size of additional service information of every data block.
213 * Prepended before block data. May be 0.
214 * Should be a power of 2 and sector-aligned for optimization reasons. */
215 uint32_t cbBlockExtra;
216 /** Number of blocks. */
217 uint32_t cBlocks;
218 /** Number of allocated blocks. */
219 uint32_t cBlocksAllocated;
220 /** UUID of image. */
221 RTUUID uuidCreate;
222 /** UUID of image's last modification. */
223 RTUUID uuidModify;
224 /** Only for secondary images - UUID of previous image. */
225 RTUUID uuidLinkage;
226 /** Only for secondary images - UUID of previous image's last modification. */
227 RTUUID uuidParentModify;
228 /** LCHS image geometry (new field in VDI1.2 version. */
229 VDIDISKGEOMETRY LCHSGeometry;
230} VDIHEADER1PLUS, *PVDIHEADER1PLUS;
231#pragma pack()
232
233/**
234 * Header structure for all versions.
235 */
236typedef struct VDIHEADER
237{
238 unsigned uVersion;
239 union
240 {
241 VDIHEADER0 v0;
242 VDIHEADER1 v1;
243 VDIHEADER1PLUS v1plus;
244 } u;
245} VDIHEADER, *PVDIHEADER;
246
247/** Block 'pointer'. */
248typedef uint32_t VDIIMAGEBLOCKPOINTER;
249/** Pointer to a block 'pointer'. */
250typedef VDIIMAGEBLOCKPOINTER *PVDIIMAGEBLOCKPOINTER;
251
252/**
253 * Block marked as free is not allocated in image file, read from this
254 * block may returns any random data.
255 */
256#define VDI_IMAGE_BLOCK_FREE ((VDIIMAGEBLOCKPOINTER)~0)
257
258/**
259 * Block marked as zero is not allocated in image file, read from this
260 * block returns zeroes.
261 */
262#define VDI_IMAGE_BLOCK_ZERO ((VDIIMAGEBLOCKPOINTER)~1)
263
264/**
265 * Block 'pointer' >= VDI_IMAGE_BLOCK_UNALLOCATED indicates block is not
266 * allocated in image file.
267 */
268#define VDI_IMAGE_BLOCK_UNALLOCATED (VDI_IMAGE_BLOCK_ZERO)
269#define IS_VDI_IMAGE_BLOCK_ALLOCATED(bp) (bp < VDI_IMAGE_BLOCK_UNALLOCATED)
270
271#define GET_MAJOR_HEADER_VERSION(ph) (VDI_GET_VERSION_MAJOR((ph)->uVersion))
272#define GET_MINOR_HEADER_VERSION(ph) (VDI_GET_VERSION_MINOR((ph)->uVersion))
273
274#ifdef VBOX_VDICORE_VD
275/** @name VDI image types
276 * @{ */
277typedef enum VDIIMAGETYPE
278{
279 /** Normal dynamically growing base image file. */
280 VDI_IMAGE_TYPE_NORMAL = 1,
281 /** Preallocated base image file of a fixed size. */
282 VDI_IMAGE_TYPE_FIXED,
283 /** Dynamically growing image file for undo/commit changes support. */
284 VDI_IMAGE_TYPE_UNDO,
285 /** Dynamically growing image file for differencing support. */
286 VDI_IMAGE_TYPE_DIFF,
287
288 /** First valid image type value. */
289 VDI_IMAGE_TYPE_FIRST = VDI_IMAGE_TYPE_NORMAL,
290 /** Last valid image type value. */
291 VDI_IMAGE_TYPE_LAST = VDI_IMAGE_TYPE_DIFF
292} VDIIMAGETYPE;
293/** Pointer to VDI image type. */
294typedef VDIIMAGETYPE *PVDIIMAGETYPE;
295/** @} */
296#endif /* VBOX_VDICORE_VD */
297
298/*******************************************************************************
299* Internal Functions for header access *
300*******************************************************************************/
301DECLINLINE(VDIIMAGETYPE) getImageType(PVDIHEADER ph)
302{
303 switch (GET_MAJOR_HEADER_VERSION(ph))
304 {
305 case 0: return (VDIIMAGETYPE)ph->u.v0.u32Type;
306 case 1: return (VDIIMAGETYPE)ph->u.v1.u32Type;
307 }
308 AssertFailed();
309 return (VDIIMAGETYPE)0;
310}
311
312#ifdef VBOX_VDICORE_VD
313DECLINLINE(unsigned) getImageFlags(PVDIHEADER ph)
314{
315 switch (GET_MAJOR_HEADER_VERSION(ph))
316 {
317 case 0:
318 /* VDI image flag conversion to VD image flags. */
319 return ph->u.v0.fFlags << 8;
320 case 1:
321 /* VDI image flag conversion to VD image flags. */
322 return ph->u.v1.fFlags << 8;
323 }
324 AssertFailed();
325 return 0;
326}
327#else /* !VBOX_VDICORE_VD */
328DECLINLINE(unsigned) getImageFlags(PVDIHEADER ph)
329{
330 switch (GET_MAJOR_HEADER_VERSION(ph))
331 {
332 case 0: return ph->u.v0.fFlags;
333 case 1: return ph->u.v1.fFlags;
334 }
335 AssertFailed();
336 return 0;
337}
338#endif /* !VBOX_VDICORE_VD */
339
340DECLINLINE(char *) getImageComment(PVDIHEADER ph)
341{
342 switch (GET_MAJOR_HEADER_VERSION(ph))
343 {
344 case 0: return &ph->u.v0.szComment[0];
345 case 1: return &ph->u.v1.szComment[0];
346 }
347 AssertFailed();
348 return NULL;
349}
350
351DECLINLINE(unsigned) getImageBlocksOffset(PVDIHEADER ph)
352{
353 switch (GET_MAJOR_HEADER_VERSION(ph))
354 {
355 case 0: return (sizeof(VDIPREHEADER) + sizeof(VDIHEADER0));
356 case 1: return ph->u.v1.offBlocks;
357 }
358 AssertFailed();
359 return 0;
360}
361
362DECLINLINE(unsigned) getImageDataOffset(PVDIHEADER ph)
363{
364 switch (GET_MAJOR_HEADER_VERSION(ph))
365 {
366 case 0: return sizeof(VDIPREHEADER) + sizeof(VDIHEADER0) + \
367 (ph->u.v0.cBlocks * sizeof(VDIIMAGEBLOCKPOINTER));
368 case 1: return ph->u.v1.offData;
369 }
370 AssertFailed();
371 return 0;
372}
373
374DECLINLINE(PVDIDISKGEOMETRY) getImageLCHSGeometry(PVDIHEADER ph)
375{
376 switch (GET_MAJOR_HEADER_VERSION(ph))
377 {
378 case 0: return NULL;
379 case 1:
380 switch (GET_MINOR_HEADER_VERSION(ph))
381 {
382 case 1:
383 if (ph->u.v1.cbHeader < sizeof(ph->u.v1plus))
384 return NULL;
385 else
386 return &ph->u.v1plus.LCHSGeometry;
387 }
388 }
389 AssertFailed();
390 return NULL;
391}
392
393DECLINLINE(uint64_t) getImageDiskSize(PVDIHEADER ph)
394{
395 switch (GET_MAJOR_HEADER_VERSION(ph))
396 {
397 case 0: return ph->u.v0.cbDisk;
398 case 1: return ph->u.v1.cbDisk;
399 }
400 AssertFailed();
401 return 0;
402}
403
404DECLINLINE(unsigned) getImageBlockSize(PVDIHEADER ph)
405{
406 switch (GET_MAJOR_HEADER_VERSION(ph))
407 {
408 case 0: return ph->u.v0.cbBlock;
409 case 1: return ph->u.v1.cbBlock;
410 }
411 AssertFailed();
412 return 0;
413}
414
415DECLINLINE(unsigned) getImageExtraBlockSize(PVDIHEADER ph)
416{
417 switch (GET_MAJOR_HEADER_VERSION(ph))
418 {
419 case 0: return 0;
420 case 1: return ph->u.v1.cbBlockExtra;
421 }
422 AssertFailed();
423 return 0;
424}
425
426DECLINLINE(unsigned) getImageBlocks(PVDIHEADER ph)
427{
428 switch (GET_MAJOR_HEADER_VERSION(ph))
429 {
430 case 0: return ph->u.v0.cBlocks;
431 case 1: return ph->u.v1.cBlocks;
432 }
433 AssertFailed();
434 return 0;
435}
436
437DECLINLINE(unsigned) getImageBlocksAllocated(PVDIHEADER ph)
438{
439 switch (GET_MAJOR_HEADER_VERSION(ph))
440 {
441 case 0: return ph->u.v0.cBlocksAllocated;
442 case 1: return ph->u.v1.cBlocksAllocated;
443 }
444 AssertFailed();
445 return 0;
446}
447
448DECLINLINE(void) setImageBlocksAllocated(PVDIHEADER ph, unsigned cBlocks)
449{
450 switch (GET_MAJOR_HEADER_VERSION(ph))
451 {
452 case 0: ph->u.v0.cBlocksAllocated = cBlocks; return;
453 case 1: ph->u.v1.cBlocksAllocated = cBlocks; return;
454 }
455 AssertFailed();
456}
457
458DECLINLINE(PRTUUID) getImageCreationUUID(PVDIHEADER ph)
459{
460 switch (GET_MAJOR_HEADER_VERSION(ph))
461 {
462 case 0: return &ph->u.v0.uuidCreate;
463 case 1: return &ph->u.v1.uuidCreate;
464 }
465 AssertFailed();
466 return NULL;
467}
468
469DECLINLINE(PRTUUID) getImageModificationUUID(PVDIHEADER ph)
470{
471 switch (GET_MAJOR_HEADER_VERSION(ph))
472 {
473 case 0: return &ph->u.v0.uuidModify;
474 case 1: return &ph->u.v1.uuidModify;
475 }
476 AssertFailed();
477 return NULL;
478}
479
480DECLINLINE(PRTUUID) getImageParentUUID(PVDIHEADER ph)
481{
482 switch (GET_MAJOR_HEADER_VERSION(ph))
483 {
484 case 0: return &ph->u.v0.uuidLinkage;
485 case 1: return &ph->u.v1.uuidLinkage;
486 }
487 AssertFailed();
488 return NULL;
489}
490
491DECLINLINE(PRTUUID) getImageParentModificationUUID(PVDIHEADER ph)
492{
493 switch (GET_MAJOR_HEADER_VERSION(ph))
494 {
495 case 1: return &ph->u.v1.uuidParentModify;
496 }
497 AssertFailed();
498 return NULL;
499}
500
501#ifndef VBOX_VDICORE_VD
502/**
503 * Default image block size, may be changed by setBlockSize/getBlockSize.
504 *
505 * Note: for speed reasons block size should be a power of 2 !
506 */
507#define VDI_IMAGE_DEFAULT_BLOCK_SIZE _1M
508#endif /* !VBOX_VDICORE_VD */
509
510#ifndef VBOX_VDICORE_VD
511/**
512 * fModified bit flags.
513 */
514#define VDI_IMAGE_MODIFIED_FLAG RT_BIT(0)
515#define VDI_IMAGE_MODIFIED_FIRST RT_BIT(1)
516#define VDI_IMAGE_MODIFIED_DISABLE_UUID_UPDATE RT_BIT(2)
517#endif /* !VBOX_VDICORE_VD */
518
519/**
520 * Image structure
521 */
522typedef struct VDIIMAGEDESC
523{
524#ifndef VBOX_VDICORE_VD
525 /** Link to parent image descriptor, if any. */
526 struct VDIIMAGEDESC *pPrev;
527 /** Link to child image descriptor, if any. */
528 struct VDIIMAGEDESC *pNext;
529#endif /* !VBOX_VDICORE_VD */
530 /** File handle. */
531 RTFILE File;
532#ifndef VBOX_VDICORE_VD
533 /** True if the image is operating in readonly mode. */
534 bool fReadOnly;
535 /** Image open flags, VDI_OPEN_FLAGS_*. */
536 unsigned fOpen;
537#else /* VBOX_VDICORE_VD */
538 /** Image open flags, VD__OPEN_FLAGS_*. */
539 unsigned uOpenFlags;
540#endif /* VBOX_VDICORE_VD */
541 /** Image pre-header. */
542 VDIPREHEADER PreHeader;
543 /** Image header. */
544 VDIHEADER Header;
545 /** Pointer to a block array. */
546 PVDIIMAGEBLOCKPOINTER paBlocks;
547#ifndef VBOX_VDICORE_VD
548 /** fFlags copy from image header, for speed optimization. */
549 unsigned fFlags;
550#else /* VBOX_VDICORE_VD */
551 /** fFlags copy from image header, for speed optimization. */
552 unsigned uImageFlags;
553#endif /* VBOX_VDICORE_VD */
554 /** Start offset of block array in image file, here for speed optimization. */
555 unsigned offStartBlocks;
556 /** Start offset of data in image file, here for speed optimization. */
557 unsigned offStartData;
558 /** Block mask for getting the offset into a block from a byte hdd offset. */
559 unsigned uBlockMask;
560 /** Block shift value for converting byte hdd offset into paBlock index. */
561 unsigned uShiftOffset2Index;
562#ifndef VBOX_VDICORE_VD
563 /** Block shift value for converting block index into offset in image. */
564 unsigned uShiftIndex2Offset;
565#endif /* !VBOX_VDICORE_VD */
566 /** Offset of data from the beginning of block. */
567 unsigned offStartBlockData;
568#ifndef VBOX_VDICORE_VD
569 /** Image is modified flags (VDI_IMAGE_MODIFIED*). */
570 unsigned fModified;
571 /** Container filename. (UTF-8)
572 * @todo Make this variable length to save a bunch of bytes. (low prio) */
573 char szFilename[RTPATH_MAX];
574#else /* VBOX_VDICORE_VD */
575 /** Total size of image block (including the extra data). */
576 unsigned cbTotalBlockData;
577 /** Container filename. (UTF-8) */
578 const char *pszFilename;
579 /** Physical geometry of this image (never actually stored). */
580 PDMMEDIAGEOMETRY PCHSGeometry;
581 /** Pointer to the per-disk VD interface list. */
582 PVDINTERFACE pVDIfsDisk;
583 /** Error interface. */
584 PVDINTERFACE pInterfaceError;
585 /** Error interface callback table. */
586 PVDINTERFACEERROR pInterfaceErrorCallbacks;
587#endif /* VBOX_VDICORE_VD */
588} VDIIMAGEDESC, *PVDIIMAGEDESC;
589
590#ifndef VBOX_VDICORE_VD
591/**
592 * Default work buffer size, may be changed by setBufferSize() method.
593 *
594 * For best speed performance it must be equal to image block size.
595 */
596#define VDIDISK_DEFAULT_BUFFER_SIZE (VDI_IMAGE_DEFAULT_BLOCK_SIZE)
597#endif /* !VBOX_VDICORE_VD */
598
599/** VDIDISK Signature. */
600#define VDIDISK_SIGNATURE (0xbedafeda)
601
602/**
603 * VBox HDD Container main structure, private part.
604 */
605struct VDIDISK
606{
607 /** Structure signature (VDIDISK_SIGNATURE). */
608 uint32_t u32Signature;
609
610 /** Number of opened images. */
611 unsigned cImages;
612
613 /** Base image. */
614 PVDIIMAGEDESC pBase;
615
616 /** Last opened image in the chain.
617 * The same as pBase if only one image is used or the last opened diff image. */
618 PVDIIMAGEDESC pLast;
619
620 /** Default block size for newly created images. */
621 unsigned cbBlock;
622
623 /** Working buffer size, allocated only while committing data,
624 * copying block from primary image to secondary and saving previously
625 * zero block. Buffer deallocated after operation complete.
626 * @remark For best performance buffer size must be equal to image's
627 * block size, however it may be decreased for memory saving.
628 */
629 unsigned cbBuf;
630
631 /** Flag whether zero writes should be handled normally or optimized
632 * away if possible. */
633 bool fHonorZeroWrites;
634
635 /** The media interface. */
636 PDMIMEDIA IMedia;
637 /** Pointer to the driver instance. */
638 PPDMDRVINS pDrvIns;
639};
640
641
642/*******************************************************************************
643* Internal Functions *
644*******************************************************************************/
645RT_C_DECLS_BEGIN
646
647#ifndef VBOX_VDICORE_VD
648VBOXDDU_DECL(void) vdiInitVDIDisk(PVDIDISK pDisk);
649VBOXDDU_DECL(void) VDIFlushImage(PVDIIMAGEDESC pImage);
650VBOXDDU_DECL(int) vdiChangeImageMode(PVDIIMAGEDESC pImage, bool fReadOnly);
651#endif /* !VBOX_VDICORE_VD */
652
653RT_C_DECLS_END
654
655#endif
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