Parallels.cpp@ 40685

Last change on this file since 40685 was 38469, checked in by vboxsync, 13 years ago
VD: Interface cleanup. Merge the two involved structures (generic interface descriptor and callback table) into one, remove the duplicated interface wrappers in the backends and move the interface definitions into separate headers separating public and private interfaces.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 46.1 KB

Line
1	/* $Id: Parallels.cpp 38469 2011-08-16 10:34:32Z vboxsync $ */
2	/** @file
3	*
4	* Parallels hdd disk image, core code.
5	*/
6
7	/*
8	* Copyright (C) 2006-2010 Oracle Corporation
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*/
18
19	#define LOG_GROUP LOG_GROUP_VD_PARALLELS
20	#include <VBox/vd-plugin.h>
21	#include <VBox/err.h>
22
23	#include <VBox/log.h>
24	#include <iprt/assert.h>
25	#include <iprt/mem.h>
26	#include <iprt/uuid.h>
27	#include <iprt/path.h>
28	#include <iprt/string.h>
29
30	#define PARALLELS_HEADER_MAGIC "WithoutFreeSpace"
31	#define PARALLELS_DISK_VERSION 2
32
33	/** The header of the parallels disk. */
34	#pragma pack(1)
35	typedef struct ParallelsHeader
36	{
37	/** The magic header to identify a parallels hdd image. */
38	char HeaderIdentifier[16];
39	/** The version of the disk image. */
40	uint32_t uVersion;
41	/** The number of heads the hdd has. */
42	uint32_t cHeads;
43	/** Number of cylinders. */
44	uint32_t cCylinders;
45	/** Number of sectors per track. */
46	uint32_t cSectorsPerTrack;
47	/** Number of entries in the allocation bitmap. */
48	uint32_t cEntriesInAllocationBitmap;
49	/** Total number of sectors. */
50	uint32_t cSectors;
51	/** Padding. */
52	char Padding[24];
53	} ParallelsHeader;
54	#pragma pack()
55
56	/**
57	* Parallels image structure.
58	*/
59	typedef struct PARALLELSIMAGE
60	{
61	/** Image file name. */
62	const char *pszFilename;
63	/** Opaque storage handle. */
64	PVDIOSTORAGE pStorage;
65
66	/** Pointer to the per-disk VD interface list. */
67	PVDINTERFACE pVDIfsDisk;
68	/** Pointer to the per-image VD interface list. */
69	PVDINTERFACE pVDIfsImage;
70	/** Error interface. */
71	PVDINTERFACEERROR pIfError;
72	/** I/O interface. */
73	PVDINTERFACEIOINT pIfIo;
74
75	/** Open flags passed by VBoxHDD layer. */
76	unsigned uOpenFlags;
77	/** Image flags defined during creation or determined during open. */
78	unsigned uImageFlags;
79	/** Total size of the image. */
80	uint64_t cbSize;
81
82	/** Physical geometry of this image. */
83	VDGEOMETRY PCHSGeometry;
84	/** Logical geometry of this image. */
85	VDGEOMETRY LCHSGeometry;
86
87	/** Pointer to the allocation bitmap. */
88	uint32_t *pAllocationBitmap;
89	/** Entries in the allocation bitmap. */
90	uint64_t cAllocationBitmapEntries;
91	/** Flag whether the allocation bitmap was changed. */
92	bool fAllocationBitmapChanged;
93	/** Current file size. */
94	uint64_t cbFileCurrent;
95	} PARALLELSIMAGE, *PPARALLELSIMAGE;
96
97	/*******************************************************************************
98	* Static Variables *
99	*******************************************************************************/
100
101	/** NULL-terminated array of supported file extensions. */
102	static const VDFILEEXTENSION s_aParallelsFileExtensions[] =
103	{
104	{"hdd", VDTYPE_HDD},
105	{NULL, VDTYPE_INVALID}
106	};
107
108	/***************************************************
109	* Internal functions *
110	**************************************************/
111
112	/**
113	* Internal. Flush image data to disk.
114	*/
115	static int parallelsFlushImage(PPARALLELSIMAGE pImage)
116	{
117	int rc = VINF_SUCCESS;
118
119	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
120	return VINF_SUCCESS;
121
122	if ( !(pImage->uImageFlags & VD_IMAGE_FLAGS_FIXED)
123	&& (pImage->fAllocationBitmapChanged))
124	{
125	pImage->fAllocationBitmapChanged = false;
126	/* Write the allocation bitmap to the file. */
127	rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage,
128	sizeof(ParallelsHeader), pImage->pAllocationBitmap,
129	pImage->cAllocationBitmapEntries * sizeof(uint32_t),
130	NULL);
131	if (RT_FAILURE(rc))
132	return rc;
133	}
134
135	/* Flush file. */
136	rc = vdIfIoIntFileFlushSync(pImage->pIfIo, pImage->pStorage);
137
138	LogFlowFunc(("returns %Rrc\n", rc));
139	return rc;
140	}
141
142	/**
143	* Internal. Free all allocated space for representing an image except pImage,
144	* and optionally delete the image from disk.
145	*/
146	static int parallelsFreeImage(PPARALLELSIMAGE pImage, bool fDelete)
147	{
148	int rc = VINF_SUCCESS;
149
150	/* Freeing a never allocated image (e.g. because the open failed) is
151	* not signalled as an error. After all nothing bad happens. */
152	if (pImage)
153	{
154	if (pImage->pStorage)
155	{
156	/* No point updating the file that is deleted anyway. */
157	if (!fDelete)
158	parallelsFlushImage(pImage);
159
160	vdIfIoIntFileClose(pImage->pIfIo, pImage->pStorage);
161	pImage->pStorage = NULL;
162	}
163
164	if (pImage->pAllocationBitmap)
165	{
166	RTMemFree(pImage->pAllocationBitmap);
167	pImage->pAllocationBitmap = NULL;
168	}
169
170	if (fDelete && pImage->pszFilename)
171	vdIfIoIntFileDelete(pImage->pIfIo, pImage->pszFilename);
172	}
173
174	return rc;
175	}
176
177	static int parallelsOpenImage(PPARALLELSIMAGE pImage, unsigned uOpenFlags)
178	{
179	int rc = VINF_SUCCESS;
180	ParallelsHeader parallelsHeader;
181
182	pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk);
183	pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage);
184	AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER);
185
186	rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename,
187	VDOpenFlagsToFileOpenFlags(uOpenFlags,
188	false /* fCreate */),
189	&pImage->pStorage);
190	if (RT_FAILURE(rc))
191	goto out;
192
193	rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &pImage->cbFileCurrent);
194	if (RT_FAILURE(rc))
195	goto out;
196	AssertMsg(pImage->cbFileCurrent % 512 == 0, ("File size is not a multiple of 512\n"));
197
198	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, 0,
199	&parallelsHeader, sizeof(parallelsHeader), NULL);
200	if (RT_FAILURE(rc))
201	goto out;
202
203	if (memcmp(parallelsHeader.HeaderIdentifier, PARALLELS_HEADER_MAGIC, 16))
204	{
205	/* Check if the file has hdd as extension. It is a fixed size raw image then. */
206	char *pszExtension = RTPathExt(pImage->pszFilename);
207	if (strcmp(pszExtension, ".hdd"))
208	{
209	rc = VERR_VD_PARALLELS_INVALID_HEADER;
210	goto out;
211	}
212
213	/* This is a fixed size image. */
214	pImage->uImageFlags \|= VD_IMAGE_FLAGS_FIXED;
215	pImage->cbSize = pImage->cbFileCurrent;
216
217	pImage->PCHSGeometry.cHeads = 16;
218	pImage->PCHSGeometry.cSectors = 63;
219	uint64_t cCylinders = pImage->cbSize / (512 * pImage->PCHSGeometry.cSectors * pImage->PCHSGeometry.cHeads);
220	pImage->PCHSGeometry.cCylinders = (uint32_t)cCylinders;
221	}
222	else
223	{
224	if (parallelsHeader.uVersion != PARALLELS_DISK_VERSION)
225	{
226	rc = VERR_NOT_SUPPORTED;
227	goto out;
228	}
229
230	if (parallelsHeader.cEntriesInAllocationBitmap > (1 << 30))
231	{
232	rc = VERR_NOT_SUPPORTED;
233	goto out;
234	}
235
236	Log(("cSectors=%u\n", parallelsHeader.cSectors));
237	pImage->cbSize = ((uint64_t)parallelsHeader.cSectors) * 512;
238	pImage->uImageFlags = VD_IMAGE_FLAGS_NONE;
239	pImage->cAllocationBitmapEntries = parallelsHeader.cEntriesInAllocationBitmap;
240	pImage->pAllocationBitmap = (uint32_t )RTMemAllocZ((uint32_t)pImage->cAllocationBitmapEntries sizeof(uint32_t));
241	if (!pImage->pAllocationBitmap)
242	{
243	rc = VERR_NO_MEMORY;
244	goto out;
245	}
246
247	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage,
248	sizeof(ParallelsHeader), pImage->pAllocationBitmap,
249	pImage->cAllocationBitmapEntries * sizeof(uint32_t),
250	NULL);
251	if (RT_FAILURE(rc))
252	goto out;
253
254	pImage->PCHSGeometry.cCylinders = parallelsHeader.cCylinders;
255	pImage->PCHSGeometry.cHeads = parallelsHeader.cHeads;
256	pImage->PCHSGeometry.cSectors = parallelsHeader.cSectorsPerTrack;
257	}
258
259	out:
260	LogFlowFunc(("returns %Rrc\n", rc));
261	return rc;
262	}
263
264	/**
265	* Internal: Create a parallels image.
266	*/
267	static int parallelsCreateImage(PPARALLELSIMAGE pImage, uint64_t cbSize,
268	unsigned uImageFlags, const char *pszComment,
269	PCVDGEOMETRY pPCHSGeometry,
270	PCVDGEOMETRY pLCHSGeometry, unsigned uOpenFlags,
271	PFNVDPROGRESS pfnProgress, void *pvUser,
272	unsigned uPercentStart, unsigned uPercentSpan)
273	{
274	int rc = VINF_SUCCESS;
275	int32_t fOpen;
276
277	if (uImageFlags & VD_IMAGE_FLAGS_FIXED)
278	{
279	rc = vdIfError(pImage->pIfError, VERR_VD_INVALID_TYPE, RT_SRC_POS, N_("Parallels: cannot create fixed image '%s'. Create a raw image"), pImage->pszFilename);
280	goto out;
281	}
282
283	pImage->uOpenFlags = uOpenFlags & ~VD_OPEN_FLAGS_READONLY;
284	pImage->uImageFlags = uImageFlags;
285	pImage->PCHSGeometry = *pPCHSGeometry;
286	pImage->LCHSGeometry = *pLCHSGeometry;
287
288	if (!pImage->PCHSGeometry.cCylinders)
289	{
290	/* Set defaults. */
291	pImage->PCHSGeometry.cSectors = 63;
292	pImage->PCHSGeometry.cHeads = 16;
293	pImage->PCHSGeometry.cCylinders = pImage->cbSize / (512 * pImage->PCHSGeometry.cSectors * pImage->PCHSGeometry.cHeads);
294	}
295
296	pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk);
297	pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage);
298	AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER);
299
300	/* Create image file. */
301	fOpen = VDOpenFlagsToFileOpenFlags(pImage->uOpenFlags, true /* fCreate */);
302	rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename, fOpen, &pImage->pStorage);
303	if (RT_FAILURE(rc))
304	{
305	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS, N_("Parallels: cannot create image '%s'"), pImage->pszFilename);
306	goto out;
307	}
308
309	if (RT_SUCCESS(rc) && pfnProgress)
310	pfnProgress(pvUser, uPercentStart + uPercentSpan * 98 / 100);
311
312	/* Setup image state. */
313	pImage->cbSize = cbSize;
314	pImage->cAllocationBitmapEntries = cbSize / 512 / pImage->PCHSGeometry.cSectors;
315	if (pImage->cAllocationBitmapEntries * pImage->PCHSGeometry.cSectors * 512 < cbSize)
316	pImage->cAllocationBitmapEntries++;
317	pImage->fAllocationBitmapChanged = true;
318	pImage->cbFileCurrent = sizeof(ParallelsHeader) + pImage->cAllocationBitmapEntries * sizeof(uint32_t);
319	/* Round to next sector boundary. */
320	pImage->cbFileCurrent += 512 - pImage->cbFileCurrent % 512;
321	Assert(!(pImage->cbFileCurrent % 512));
322	pImage->pAllocationBitmap = (uint32_t )RTMemAllocZ(pImage->cAllocationBitmapEntries sizeof(uint32_t));
323	if (!pImage->pAllocationBitmap)
324	rc = VERR_NO_MEMORY;
325
326	if (RT_SUCCESS(rc))
327	{
328	ParallelsHeader Header;
329
330	memcpy(Header.HeaderIdentifier, PARALLELS_HEADER_MAGIC, sizeof(Header.HeaderIdentifier));
331	Header.uVersion = RT_H2LE_U32(PARALLELS_DISK_VERSION);
332	Header.cHeads = RT_H2LE_U32(pImage->PCHSGeometry.cHeads);
333	Header.cCylinders = RT_H2LE_U32(pImage->PCHSGeometry.cCylinders);
334	Header.cSectorsPerTrack = RT_H2LE_U32(pImage->PCHSGeometry.cSectors);
335	Header.cEntriesInAllocationBitmap = RT_H2LE_U32(pImage->cAllocationBitmapEntries);
336	Header.cSectors = RT_H2LE_U32(pImage->cbSize / 512);
337	memset(Header.Padding, 0, sizeof(Header.Padding));
338
339	/* Write header and allocation bitmap. */
340	rc = vdIfIoIntFileSetSize(pImage->pIfIo, pImage->pStorage, pImage->cbFileCurrent);
341	if (RT_SUCCESS(rc))
342	rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage, 0,
343	&Header, sizeof(Header), NULL);
344	if (RT_SUCCESS(rc))
345	rc = parallelsFlushImage(pImage); /* Writes the allocation bitmap. */
346	}
347
348	out:
349	if (RT_SUCCESS(rc) && pfnProgress)
350	pfnProgress(pvUser, uPercentStart + uPercentSpan);
351
352	if (RT_FAILURE(rc))
353	parallelsFreeImage(pImage, rc != VERR_ALREADY_EXISTS);
354	return rc;
355	}
356
357	/** @copydoc VBOXHDDBACKEND::pfnCheckIfValid */
358	static int parallelsCheckIfValid(const char *pszFilename, PVDINTERFACE pVDIfsDisk,
359	PVDINTERFACE pVDIfsImage, VDTYPE *penmType)
360	{
361	int rc;
362	PVDIOSTORAGE pStorage;
363	ParallelsHeader parallelsHeader;
364
365	PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage);
366	AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER);
367
368	rc = vdIfIoIntFileOpen(pIfIo, pszFilename,
369	VDOpenFlagsToFileOpenFlags(VD_OPEN_FLAGS_READONLY,
370	false /* fCreate */),
371	&pStorage);
372	if (RT_FAILURE(rc))
373	return rc;
374
375	rc = vdIfIoIntFileReadSync(pIfIo, pStorage, 0, &parallelsHeader,
376	sizeof(ParallelsHeader), NULL);
377	if (RT_SUCCESS(rc))
378	{
379	if ( !memcmp(parallelsHeader.HeaderIdentifier, PARALLELS_HEADER_MAGIC, 16)
380	&& (parallelsHeader.uVersion == PARALLELS_DISK_VERSION))
381	rc = VINF_SUCCESS;
382	else
383	{
384	/*
385	* The image may be an fixed size image.
386	* Unfortunately fixed sized parallels images
387	* are just raw files hence no magic header to
388	* check for.
389	* The code succeeds if the file is a multiple
390	* of 512 and if the file extensions is *.hdd
391	*/
392	uint64_t cbFile;
393	char *pszExtension;
394
395	rc = vdIfIoIntFileGetSize(pIfIo, pStorage, &cbFile);
396	if (RT_FAILURE(rc) \|\| ((cbFile % 512) != 0))
397	{
398	vdIfIoIntFileClose(pIfIo, pStorage);
399	return VERR_VD_PARALLELS_INVALID_HEADER;
400	}
401
402	pszExtension = RTPathExt(pszFilename);
403	if (!pszExtension \|\| strcmp(pszExtension, ".hdd"))
404	rc = VERR_VD_PARALLELS_INVALID_HEADER;
405	else
406	rc = VINF_SUCCESS;
407	}
408	}
409
410	if (RT_SUCCESS(rc))
411	*penmType = VDTYPE_HDD;
412
413	vdIfIoIntFileClose(pIfIo, pStorage);
414	return rc;
415	}
416
417	/** @copydoc VBOXHDDBACKEND::pfnOpen */
418	static int parallelsOpen(const char *pszFilename, unsigned uOpenFlags,
419	PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
420	VDTYPE enmType, void **ppBackendData)
421	{
422	LogFlowFunc(("pszFilename=\"%s\" uOpenFlags=%#x pVDIfsDisk=%#p pVDIfsImage=%#p ppBackendData=%#p\n", pszFilename, uOpenFlags, pVDIfsDisk, pVDIfsImage, ppBackendData));
423	int rc;
424	PPARALLELSIMAGE pImage;
425
426	/* Check open flags. All valid flags are supported. */
427	if (uOpenFlags & ~VD_OPEN_FLAGS_MASK)
428	{
429	rc = VERR_INVALID_PARAMETER;
430	goto out;
431	}
432
433	/* Check remaining arguments. */
434	if ( !VALID_PTR(pszFilename)
435	\|\| !*pszFilename)
436	{
437	rc = VERR_INVALID_PARAMETER;
438	goto out;
439	}
440
441	pImage = (PPARALLELSIMAGE)RTMemAllocZ(sizeof(PARALLELSIMAGE));
442	if (!pImage)
443	{
444	rc = VERR_NO_MEMORY;
445	goto out;
446	}
447
448	pImage->pszFilename = pszFilename;
449	pImage->pStorage = NULL;
450	pImage->pVDIfsDisk = pVDIfsDisk;
451	pImage->pVDIfsImage = pVDIfsImage;
452	pImage->fAllocationBitmapChanged = false;
453
454	rc = parallelsOpenImage(pImage, uOpenFlags);
455	if (RT_SUCCESS(rc))
456	*ppBackendData = pImage;
457	else
458	RTMemFree(pImage);
459
460	out:
461	LogFlowFunc(("returns %Rrc (pBackendData=%#p)\n", rc, *ppBackendData));
462	return rc;
463	}
464
465	/** @copydoc VBOXHDDBACKEND::pfnCreate */
466	static int parallelsCreate(const char *pszFilename, uint64_t cbSize,
467	unsigned uImageFlags, const char *pszComment,
468	PCVDGEOMETRY pPCHSGeometry,
469	PCVDGEOMETRY pLCHSGeometry, PCRTUUID pUuid,
470	unsigned uOpenFlags, unsigned uPercentStart,
471	unsigned uPercentSpan, PVDINTERFACE pVDIfsDisk,
472	PVDINTERFACE pVDIfsImage,
473	PVDINTERFACE pVDIfsOperation, void **ppBackendData)
474	{
475	LogFlowFunc(("pszFilename=\"%s\" cbSize=%llu uImageFlags=%#x pszComment=\"%s\" pPCHSGeometry=%#p pLCHSGeometry=%#p Uuid=%RTuuid uOpenFlags=%#x uPercentStart=%u uPercentSpan=%u pVDIfsDisk=%#p pVDIfsImage=%#p pVDIfsOperation=%#p ppBackendData=%#p",
476	pszFilename, cbSize, uImageFlags, pszComment, pPCHSGeometry, pLCHSGeometry, pUuid, uOpenFlags, uPercentStart, uPercentSpan, pVDIfsDisk, pVDIfsImage, pVDIfsOperation, ppBackendData));
477	int rc = VINF_SUCCESS;
478	PPARALLELSIMAGE pImage;
479
480	PFNVDPROGRESS pfnProgress = NULL;
481	void *pvUser = NULL;
482	PVDINTERFACEPROGRESS pIfProgress = VDIfProgressGet(pVDIfsOperation);
483	if (pIfProgress)
484	{
485	pfnProgress = pIfProgress->pfnProgress;
486	pvUser = pIfProgress->Core.pvUser;
487	}
488
489	/* Check open flags. All valid flags are supported. */
490	if (uOpenFlags & ~VD_OPEN_FLAGS_MASK)
491	{
492	rc = VERR_INVALID_PARAMETER;
493	goto out;
494	}
495
496	/* Check remaining arguments. */
497	if ( !VALID_PTR(pszFilename)
498	\|\| !*pszFilename
499	\|\| !VALID_PTR(pPCHSGeometry)
500	\|\| !VALID_PTR(pLCHSGeometry))
501	{
502	rc = VERR_INVALID_PARAMETER;
503	goto out;
504	}
505
506	pImage = (PPARALLELSIMAGE)RTMemAllocZ(sizeof(PARALLELSIMAGE));
507	if (!pImage)
508	{
509	rc = VERR_NO_MEMORY;
510	goto out;
511	}
512	pImage->pszFilename = pszFilename;
513	pImage->pStorage = NULL;
514	pImage->pVDIfsDisk = pVDIfsDisk;
515	pImage->pVDIfsImage = pVDIfsImage;
516
517	rc = parallelsCreateImage(pImage, cbSize, uImageFlags, pszComment,
518	pPCHSGeometry, pLCHSGeometry, uOpenFlags,
519	pfnProgress, pvUser, uPercentStart, uPercentSpan);
520	if (RT_SUCCESS(rc))
521	{
522	/* So far the image is opened in read/write mode. Make sure the
523	* image is opened in read-only mode if the caller requested that. */
524	if (uOpenFlags & VD_OPEN_FLAGS_READONLY)
525	{
526	parallelsFreeImage(pImage, false);
527	rc = parallelsOpenImage(pImage, uOpenFlags);
528	if (RT_FAILURE(rc))
529	{
530	RTMemFree(pImage);
531	goto out;
532	}
533	}
534	*ppBackendData = pImage;
535	}
536	else
537	RTMemFree(pImage);
538
539	out:
540	LogFlowFunc(("returns %Rrc\n", rc));
541	return rc;
542	}
543
544	/** @copydoc VBOXHDDBACKEND::pfnRename */
545	static int parallelsRename(void pBackendData, const char pszFilename)
546	{
547	LogFlowFunc(("pBackendData=%#p pszFilename=%#p\n", pBackendData, pszFilename));
548	int rc = VINF_SUCCESS;
549	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
550
551	/* Check arguments. */
552	if ( !pImage
553	\|\| !pszFilename
554	\|\| !*pszFilename)
555	{
556	rc = VERR_INVALID_PARAMETER;
557	goto out;
558	}
559
560	/* Close the image. */
561	rc = parallelsFreeImage(pImage, false);
562	if (RT_FAILURE(rc))
563	goto out;
564
565	/* Rename the file. */
566	rc = vdIfIoIntFileMove(pImage->pIfIo, pImage->pszFilename, pszFilename, 0);
567	if (RT_FAILURE(rc))
568	{
569	/* The move failed, try to reopen the original image. */
570	int rc2 = parallelsOpenImage(pImage, pImage->uOpenFlags);
571	if (RT_FAILURE(rc2))
572	rc = rc2;
573
574	goto out;
575	}
576
577	/* Update pImage with the new information. */
578	pImage->pszFilename = pszFilename;
579
580	/* Open the old image with new name. */
581	rc = parallelsOpenImage(pImage, pImage->uOpenFlags);
582	if (RT_FAILURE(rc))
583	goto out;
584
585	out:
586	LogFlowFunc(("returns %Rrc\n", rc));
587	return rc;
588	}
589
590	/** @copydoc VBOXHDDBACKEND::pfnClose */
591	static int parallelsClose(void *pBackendData, bool fDelete)
592	{
593	LogFlowFunc(("pBackendData=%#p fDelete=%d\n", pBackendData, fDelete));
594	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
595	int rc;
596
597	rc = parallelsFreeImage(pImage, fDelete);
598	RTMemFree(pImage);
599
600	LogFlowFunc(("returns %Rrc\n", rc));
601	return rc;
602	}
603
604	/** @copydoc VBOXHDDBACKEND::pfnRead */
605	static int parallelsRead(void pBackendData, uint64_t uOffset, void pvBuf,
606	size_t cbToRead, size_t *pcbActuallyRead)
607	{
608	LogFlowFunc(("pBackendData=%#p uOffset=%llu pvBuf=%#p cbToRead=%zu pcbActuallyRead=%#p\n",
609	pBackendData, uOffset, pvBuf, cbToRead, pcbActuallyRead));
610	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
611	int rc = VINF_SUCCESS;
612
613	AssertPtr(pImage);
614	Assert(uOffset % 512 == 0);
615	Assert(cbToRead % 512 == 0);
616
617	if (pImage->uImageFlags & VD_IMAGE_FLAGS_FIXED)
618	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, uOffset, pvBuf, cbToRead, NULL);
619	else
620	{
621	uint64_t uSector;
622	uint32_t iIndexInAllocationTable;
623
624	/* Calculate offset in the real file. */
625	uSector = uOffset / 512;
626
627	/* One chunk in the file is always one track big. */
628	iIndexInAllocationTable = (uint32_t)(uSector / pImage->PCHSGeometry.cSectors);
629	uSector = uSector % pImage->PCHSGeometry.cSectors;
630
631	Assert(iIndexInAllocationTable < pImage->cAllocationBitmapEntries);
632
633	cbToRead = RT_MIN(cbToRead, (pImage->PCHSGeometry.cSectors - uSector)*512);
634
635	LogFlowFunc(("AllocationBitmap[%u]=%u uSector=%u cbToRead=%zu cAllocationBitmapEntries=%u\n",
636	iIndexInAllocationTable, pImage->pAllocationBitmap[iIndexInAllocationTable],
637	uSector, cbToRead, pImage->cAllocationBitmapEntries));
638
639	if (pImage->pAllocationBitmap[iIndexInAllocationTable] == 0)
640	rc = VERR_VD_BLOCK_FREE;
641	else
642	{
643	uint64_t uOffsetInFile = ((uint64_t)pImage->pAllocationBitmap[iIndexInAllocationTable] + uSector) * 512;
644
645	LogFlowFunc(("uOffsetInFile=%llu\n", uOffsetInFile));
646	rc = vdIfIoIntFileReadSync(pImage->pIfIo, pImage->pStorage, uOffsetInFile,
647	pvBuf, cbToRead, NULL);
648	}
649	}
650
651	if ( ( RT_SUCCESS(rc)
652	\|\| rc == VERR_VD_BLOCK_FREE)
653	&& pcbActuallyRead)
654	*pcbActuallyRead = cbToRead;
655
656	LogFlowFunc(("returns %Rrc\n", rc));
657	return rc;
658	}
659
660	/** @copydoc VBOXHDDBACKEND::pfnWrite */
661	static int parallelsWrite(void pBackendData, uint64_t uOffset, const void pvBuf,
662	size_t cbToWrite, size_t *pcbWriteProcess,
663	size_t pcbPreRead, size_t pcbPostRead, unsigned fWrite)
664	{
665	LogFlowFunc(("pBackendData=%#p uOffset=%llu pvBuf=%#p cbToWrite=%zu pcbWriteProcess=%#p\n",
666	pBackendData, uOffset, pvBuf, cbToWrite, pcbWriteProcess));
667	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
668	int rc = VINF_SUCCESS;
669
670	AssertPtr(pImage);
671	Assert(uOffset % 512 == 0);
672	Assert(cbToWrite % 512 == 0);
673
674	if (pImage->uImageFlags & VD_IMAGE_FLAGS_FIXED)
675	rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage, uOffset,
676	pvBuf, cbToWrite, NULL);
677	else
678	{
679	uint64_t uSector;
680	uint64_t uOffsetInFile;
681	uint32_t iIndexInAllocationTable;
682
683	/* Calculate offset in the real file. */
684	uSector = uOffset / 512;
685	/* One chunk in the file is always one track big. */
686	iIndexInAllocationTable = (uint32_t)(uSector / pImage->PCHSGeometry.cSectors);
687	uSector = uSector % pImage->PCHSGeometry.cSectors;
688
689	Assert(iIndexInAllocationTable < pImage->cAllocationBitmapEntries);
690
691	cbToWrite = RT_MIN(cbToWrite, (pImage->PCHSGeometry.cSectors - uSector)*512);
692
693	LogFlowFunc(("AllocationBitmap[%u]=%u uSector=%u cbToWrite=%zu cAllocationBitmapEntries=%u\n",
694	iIndexInAllocationTable, pImage->pAllocationBitmap[iIndexInAllocationTable],
695	uSector, cbToWrite, pImage->cAllocationBitmapEntries));
696
697	if (pImage->pAllocationBitmap[iIndexInAllocationTable] == 0)
698	{
699	if ( cbToWrite == pImage->PCHSGeometry.cSectors * 512
700	&& !(fWrite & VD_WRITE_NO_ALLOC))
701	{
702	/* Stay on the safe side. Do not run the risk of confusing the higher
703	* level, as that can be pretty lethal to image consistency. */
704	*pcbPreRead = 0;
705	*pcbPostRead = 0;
706
707	/* Allocate new chunk in the file. */
708	AssertMsg(pImage->cbFileCurrent % 512 == 0, ("File size is not a multiple of 512\n"));
709	pImage->pAllocationBitmap[iIndexInAllocationTable] = (uint32_t)(pImage->cbFileCurrent / 512);
710	pImage->cbFileCurrent += pImage->PCHSGeometry.cSectors * 512;
711	pImage->fAllocationBitmapChanged = true;
712
713	uOffsetInFile = (uint64_t)pImage->pAllocationBitmap[iIndexInAllocationTable] * 512;
714
715	LogFlowFunc(("uOffsetInFile=%llu\n", uOffsetInFile));
716
717	/*
718	* Write the new block at the current end of the file.
719	*/
720	rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage,
721	uOffsetInFile, pvBuf, cbToWrite, NULL);
722	}
723	else
724	{
725	/* Trying to do a partial write to an unallocated cluster. Don't do
726	* anything except letting the upper layer know what to do. */
727	pcbPreRead = uSector 512;
728	pcbPostRead = (pImage->PCHSGeometry.cSectors 512) - cbToWrite - *pcbPreRead;
729	rc = VERR_VD_BLOCK_FREE;
730	}
731	}
732	else
733	{
734	uOffsetInFile = ((uint64_t)pImage->pAllocationBitmap[iIndexInAllocationTable] + uSector) * 512;
735
736	LogFlowFunc(("uOffsetInFile=%llu\n", uOffsetInFile));
737	rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage, uOffsetInFile,
738	pvBuf, cbToWrite, NULL);
739	}
740	}
741
742	if (pcbWriteProcess)
743	*pcbWriteProcess = cbToWrite;
744
745	out:
746	LogFlowFunc(("returns %Rrc\n", rc));
747	return rc;
748	}
749
750	/** @copydoc VBOXHDDBACKEND::pfnFlush */
751	static int parallelsFlush(void *pBackendData)
752	{
753	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
754	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
755	int rc;
756
757	AssertPtr(pImage);
758
759	rc = parallelsFlushImage(pImage);
760
761	LogFlowFunc(("returns %Rrc\n", rc));
762	return rc;
763	}
764
765	/** @copydoc VBOXHDDBACKEND::pfnGetVersion */
766	static unsigned parallelsGetVersion(void *pBackendData)
767	{
768	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
769	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
770
771	AssertPtr(pImage);
772
773	if (pImage)
774	return PARALLELS_DISK_VERSION;
775	else
776	return 0;
777	}
778
779	/** @copydoc VBOXHDDBACKEND::pfnGetSize */
780	static uint64_t parallelsGetSize(void *pBackendData)
781	{
782	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
783	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
784	uint64_t cb = 0;
785
786	AssertPtr(pImage);
787
788	if (pImage && pImage->pStorage)
789	cb = pImage->cbSize;
790
791	LogFlowFunc(("returns %llu\n", cb));
792	return cb;
793	}
794
795	/** @copydoc VBOXHDDBACKEND::pfnGetFileSize */
796	static uint64_t parallelsGetFileSize(void *pBackendData)
797	{
798	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
799	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
800	uint64_t cb = 0;
801
802	AssertPtr(pImage);
803
804	if (pImage && pImage->pStorage)
805	cb = pImage->cbFileCurrent;
806
807	LogFlowFunc(("returns %lld\n", cb));
808	return cb;
809	}
810
811	/** @copydoc VBOXHDDBACKEND::pfnGetPCHSGeometry */
812	static int parallelsGetPCHSGeometry(void *pBackendData,
813	PVDGEOMETRY pPCHSGeometry)
814	{
815	LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p\n", pBackendData, pPCHSGeometry));
816	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
817	int rc;
818
819	AssertPtr(pImage);
820
821	if (pImage)
822	{
823	if (pImage->PCHSGeometry.cCylinders)
824	{
825	*pPCHSGeometry = pImage->PCHSGeometry;
826	rc = VINF_SUCCESS;
827	}
828	else
829	rc = VERR_VD_GEOMETRY_NOT_SET;
830	}
831	else
832	rc = VERR_VD_NOT_OPENED;
833
834	LogFlowFunc(("returns %Rrc (PCHS=%u/%u/%u)\n", rc, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
835	return rc;
836	}
837
838	/** @copydoc VBOXHDDBACKEND::pfnSetPCHSGeometry */
839	static int parallelsSetPCHSGeometry(void *pBackendData,
840	PCVDGEOMETRY pPCHSGeometry)
841	{
842	LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p PCHS=%u/%u/%u\n", pBackendData, pPCHSGeometry, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
843	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
844	int rc;
845
846	AssertPtr(pImage);
847
848	if (pImage)
849	{
850	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
851	{
852	rc = VERR_VD_IMAGE_READ_ONLY;
853	goto out;
854	}
855
856	pImage->PCHSGeometry = *pPCHSGeometry;
857	rc = VINF_SUCCESS;
858	}
859	else
860	rc = VERR_VD_NOT_OPENED;
861
862	out:
863	LogFlowFunc(("returns %Rrc\n", rc));
864	return rc;
865	}
866
867	/** @copydoc VBOXHDDBACKEND::pfnGetLCHSGeometry */
868	static int parallelsGetLCHSGeometry(void *pBackendData,
869	PVDGEOMETRY pLCHSGeometry)
870	{
871	LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p\n", pBackendData, pLCHSGeometry));
872	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
873	int rc;
874
875	AssertPtr(pImage);
876
877	if (pImage)
878	{
879	if (pImage->LCHSGeometry.cCylinders)
880	{
881	*pLCHSGeometry = pImage->LCHSGeometry;
882	rc = VINF_SUCCESS;
883	}
884	else
885	rc = VERR_VD_GEOMETRY_NOT_SET;
886	}
887	else
888	rc = VERR_VD_NOT_OPENED;
889
890	LogFlowFunc(("returns %Rrc (LCHS=%u/%u/%u)\n", rc, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
891	return rc;
892	}
893
894	/** @copydoc VBOXHDDBACKEND::pfnSetLCHSGeometry */
895	static int parallelsSetLCHSGeometry(void *pBackendData,
896	PCVDGEOMETRY pLCHSGeometry)
897	{
898	LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p LCHS=%u/%u/%u\n", pBackendData, pLCHSGeometry, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
899	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
900	int rc;
901
902	AssertPtr(pImage);
903
904	if (pImage)
905	{
906	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
907	{
908	rc = VERR_VD_IMAGE_READ_ONLY;
909	goto out;
910	}
911
912	pImage->LCHSGeometry = *pLCHSGeometry;
913	rc = VINF_SUCCESS;
914	}
915	else
916	rc = VERR_VD_NOT_OPENED;
917
918	out:
919	LogFlowFunc(("returns %Rrc\n", rc));
920	return rc;
921	}
922
923	/** @copydoc VBOXHDDBACKEND::pfnGetImageFlags */
924	static unsigned parallelsGetImageFlags(void *pBackendData)
925	{
926	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
927	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
928	unsigned uImageFlags;
929
930	AssertPtr(pImage);
931
932	if (pImage)
933	uImageFlags = pImage->uImageFlags;
934	else
935	uImageFlags = 0;
936
937	LogFlowFunc(("returns %#x\n", uImageFlags));
938	return uImageFlags;
939	}
940
941	/** @copydoc VBOXHDDBACKEND::pfnGetOpenFlags */
942	static unsigned parallelsGetOpenFlags(void *pBackendData)
943	{
944	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
945	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
946	unsigned uOpenFlags;
947
948	AssertPtr(pImage);
949
950	if (pImage)
951	uOpenFlags = pImage->uOpenFlags;
952	else
953	uOpenFlags = 0;
954
955	LogFlowFunc(("returns %#x\n", uOpenFlags));
956	return uOpenFlags;
957	}
958
959	/** @copydoc VBOXHDDBACKEND::pfnSetOpenFlags */
960	static int parallelsSetOpenFlags(void *pBackendData, unsigned uOpenFlags)
961	{
962	LogFlowFunc(("pBackendData=%#p\n uOpenFlags=%#x", pBackendData, uOpenFlags));
963	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
964	int rc;
965
966	/* Image must be opened and the new flags must be valid. */
967	if (!pImage \|\| (uOpenFlags & ~(VD_OPEN_FLAGS_READONLY \| VD_OPEN_FLAGS_INFO \| VD_OPEN_FLAGS_SHAREABLE \| VD_OPEN_FLAGS_SEQUENTIAL \| VD_OPEN_FLAGS_ASYNC_IO)))
968	{
969	rc = VERR_INVALID_PARAMETER;
970	goto out;
971	}
972
973	/* Implement this operation via reopening the image. */
974	parallelsFreeImage(pImage, false);
975	rc = parallelsOpenImage(pImage, uOpenFlags);
976
977	out:
978	LogFlowFunc(("returns %Rrc\n", rc));
979	return rc;
980	}
981
982	/** @copydoc VBOXHDDBACKEND::pfnGetComment */
983	static int parallelsGetComment(void pBackendData, char pszComment,
984	size_t cbComment)
985	{
986	LogFlowFunc(("pBackendData=%#p pszComment=%#p cbComment=%zu\n", pBackendData, pszComment, cbComment));
987	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
988	int rc;
989
990	AssertPtr(pImage);
991
992	if (pImage)
993	rc = VERR_NOT_SUPPORTED;
994	else
995	rc = VERR_VD_NOT_OPENED;
996
997	LogFlowFunc(("returns %Rrc comment='%s'\n", rc, pszComment));
998	return rc;
999	}
1000
1001	/** @copydoc VBOXHDDBACKEND::pfnSetComment */
1002	static int parallelsSetComment(void pBackendData, const char pszComment)
1003	{
1004	LogFlowFunc(("pBackendData=%#p pszComment=\"%s\"\n", pBackendData, pszComment));
1005	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1006	int rc;
1007
1008	AssertPtr(pImage);
1009
1010	if (pImage)
1011	{
1012	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
1013	rc = VERR_VD_IMAGE_READ_ONLY;
1014	else
1015	rc = VERR_NOT_SUPPORTED;
1016	}
1017	else
1018	rc = VERR_VD_NOT_OPENED;
1019
1020	LogFlowFunc(("returns %Rrc\n", rc));
1021	return rc;
1022	}
1023
1024	/** @copydoc VBOXHDDBACKEND::pfnGetUuid */
1025	static int parallelsGetUuid(void *pBackendData, PRTUUID pUuid)
1026	{
1027	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
1028	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1029	int rc;
1030
1031	AssertPtr(pImage);
1032
1033	if (pImage)
1034	rc = VERR_NOT_SUPPORTED;
1035	else
1036	rc = VERR_VD_NOT_OPENED;
1037
1038	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
1039	return rc;
1040	}
1041
1042	/** @copydoc VBOXHDDBACKEND::pfnSetUuid */
1043	static int parallelsSetUuid(void *pBackendData, PCRTUUID pUuid)
1044	{
1045	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
1046	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1047	int rc;
1048
1049	AssertPtr(pImage);
1050
1051	if (pImage)
1052	{
1053	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
1054	rc = VERR_NOT_SUPPORTED;
1055	else
1056	rc = VERR_VD_IMAGE_READ_ONLY;
1057	}
1058	else
1059	rc = VERR_VD_NOT_OPENED;
1060
1061	LogFlowFunc(("returns %Rrc\n", rc));
1062	return rc;
1063	}
1064
1065	/** @copydoc VBOXHDDBACKEND::pfnGetModificationUuid */
1066	static int parallelsGetModificationUuid(void *pBackendData, PRTUUID pUuid)
1067	{
1068	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
1069	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1070	int rc;
1071
1072	AssertPtr(pImage);
1073
1074	if (pImage)
1075	rc = VERR_NOT_SUPPORTED;
1076	else
1077	rc = VERR_VD_NOT_OPENED;
1078
1079	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
1080	return rc;
1081	}
1082
1083	/** @copydoc VBOXHDDBACKEND::pfnSetModificationUuid */
1084	static int parallelsSetModificationUuid(void *pBackendData, PCRTUUID pUuid)
1085	{
1086	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
1087	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1088	int rc;
1089
1090	AssertPtr(pImage);
1091
1092	if (pImage)
1093	{
1094	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
1095	rc = VERR_NOT_SUPPORTED;
1096	else
1097	rc = VERR_VD_IMAGE_READ_ONLY;
1098	}
1099	else
1100	rc = VERR_VD_NOT_OPENED;
1101
1102	LogFlowFunc(("returns %Rrc\n", rc));
1103	return rc;
1104	}
1105
1106	/** @copydoc VBOXHDDBACKEND::pfnGetParentUuid */
1107	static int parallelsGetParentUuid(void *pBackendData, PRTUUID pUuid)
1108	{
1109	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
1110	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1111	int rc;
1112
1113	AssertPtr(pImage);
1114
1115	if (pImage)
1116	rc = VERR_NOT_SUPPORTED;
1117	else
1118	rc = VERR_VD_NOT_OPENED;
1119
1120	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
1121	return rc;
1122	}
1123
1124	/** @copydoc VBOXHDDBACKEND::pfnSetParentUuid */
1125	static int parallelsSetParentUuid(void *pBackendData, PCRTUUID pUuid)
1126	{
1127	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
1128	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1129	int rc;
1130
1131	AssertPtr(pImage);
1132
1133	if (pImage)
1134	{
1135	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
1136	rc = VERR_NOT_SUPPORTED;
1137	else
1138	rc = VERR_VD_IMAGE_READ_ONLY;
1139	}
1140	else
1141	rc = VERR_VD_NOT_OPENED;
1142
1143	LogFlowFunc(("returns %Rrc\n", rc));
1144	return rc;
1145	}
1146
1147	/** @copydoc VBOXHDDBACKEND::pfnGetParentModificationUuid */
1148	static int parallelsGetParentModificationUuid(void *pBackendData, PRTUUID pUuid)
1149	{
1150	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
1151	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1152	int rc;
1153
1154	AssertPtr(pImage);
1155
1156	if (pImage)
1157	rc = VERR_NOT_SUPPORTED;
1158	else
1159	rc = VERR_VD_NOT_OPENED;
1160
1161	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
1162	return rc;
1163	}
1164
1165	/** @copydoc VBOXHDDBACKEND::pfnSetParentModificationUuid */
1166	static int parallelsSetParentModificationUuid(void *pBackendData, PCRTUUID pUuid)
1167	{
1168	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
1169	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1170	int rc;
1171
1172	AssertPtr(pImage);
1173
1174	if (pImage)
1175	{
1176	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
1177	rc = VERR_NOT_SUPPORTED;
1178	else
1179	rc = VERR_VD_IMAGE_READ_ONLY;
1180	}
1181	else
1182	rc = VERR_VD_NOT_OPENED;
1183
1184	LogFlowFunc(("returns %Rrc\n", rc));
1185	return rc;
1186	}
1187
1188	/** @copydoc VBOXHDDBACKEND::pfnDump */
1189	static void parallelsDump(void *pBackendData)
1190	{
1191	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1192
1193	AssertPtr(pImage);
1194	if (pImage)
1195	{
1196	vdIfErrorMessage(pImage->pIfError, "Header: Geometry PCHS=%u/%u/%u LCHS=%u/%u/%u\n",
1197	pImage->PCHSGeometry.cCylinders, pImage->PCHSGeometry.cHeads, pImage->PCHSGeometry.cSectors,
1198	pImage->LCHSGeometry.cCylinders, pImage->LCHSGeometry.cHeads, pImage->LCHSGeometry.cSectors);
1199	}
1200	}
1201
1202	/** @copydoc VBOXHDDBACKEND::pfnAsyncRead */
1203	static int parallelsAsyncRead(void *pBackendData, uint64_t uOffset, size_t cbToRead,
1204	PVDIOCTX pIoCtx, size_t *pcbActuallyRead)
1205	{
1206	LogFlowFunc(("pBackendData=%#p uOffset=%llu pIoCtx=%#p cbToRead=%zu pcbActuallyRead=%#p\n",
1207	pBackendData, uOffset, pIoCtx, cbToRead, pcbActuallyRead));
1208	int rc = VINF_SUCCESS;
1209	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1210	uint64_t uSector;
1211	uint64_t uOffsetInFile;
1212	uint32_t iIndexInAllocationTable;
1213
1214	AssertPtr(pImage);
1215	Assert(uOffset % 512 == 0);
1216	Assert(cbToRead % 512 == 0);
1217
1218	if (pImage->uImageFlags & VD_IMAGE_FLAGS_FIXED)
1219	rc = vdIfIoIntFileReadUserAsync(pImage->pIfIo, pImage->pStorage, uOffset,
1220	pIoCtx, cbToRead);
1221	else
1222	{
1223	/* Calculate offset in the real file. */
1224	uSector = uOffset / 512;
1225	/* One chunk in the file is always one track big. */
1226	iIndexInAllocationTable = (uint32_t)(uSector / pImage->PCHSGeometry.cSectors);
1227	uSector = uSector % pImage->PCHSGeometry.cSectors;
1228
1229	cbToRead = RT_MIN(cbToRead, (pImage->PCHSGeometry.cSectors - uSector)*512);
1230
1231	if (pImage->pAllocationBitmap[iIndexInAllocationTable] == 0)
1232	{
1233	rc = VERR_VD_BLOCK_FREE;
1234	}
1235	else
1236	{
1237	uOffsetInFile = (pImage->pAllocationBitmap[iIndexInAllocationTable] + uSector) * 512;
1238	rc = vdIfIoIntFileReadUserAsync(pImage->pIfIo, pImage->pStorage, uOffsetInFile,
1239	pIoCtx, cbToRead);
1240	}
1241	}
1242
1243	*pcbActuallyRead = cbToRead;
1244
1245	LogFlowFunc(("returns %Rrc\n", rc));
1246	return rc;
1247	}
1248
1249	/** @copydoc VBOXHDDBACKEND::pfnAsyncWrite */
1250	static int parallelsAsyncWrite(void *pBackendData, uint64_t uOffset, size_t cbToWrite,
1251	PVDIOCTX pIoCtx,
1252	size_t pcbWriteProcess, size_t pcbPreRead,
1253	size_t *pcbPostRead, unsigned fWrite)
1254	{
1255	LogFlowFunc(("pBackendData=%#p uOffset=%llu pIoCtx=%#p cbToWrite=%zu pcbWriteProcess=%#p\n",
1256	pBackendData, uOffset, pIoCtx, cbToWrite, pcbWriteProcess));
1257	int rc = VINF_SUCCESS;
1258	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1259	uint64_t uSector;
1260	uint64_t uOffsetInFile;
1261	uint32_t iIndexInAllocationTable;
1262
1263	AssertPtr(pImage);
1264	Assert(uOffset % 512 == 0);
1265	Assert(cbToWrite % 512 == 0);
1266
1267	if (pImage->uImageFlags & VD_IMAGE_FLAGS_FIXED)
1268	rc = vdIfIoIntFileWriteUserAsync(pImage->pIfIo, pImage->pStorage, uOffset,
1269	pIoCtx, cbToWrite, NULL, NULL);
1270	else
1271	{
1272	/* Calculate offset in the real file. */
1273	uSector = uOffset / 512;
1274	/* One chunk in the file is always one track big. */
1275	iIndexInAllocationTable = (uint32_t)(uSector / pImage->PCHSGeometry.cSectors);
1276	uSector = uSector % pImage->PCHSGeometry.cSectors;
1277
1278	cbToWrite = RT_MIN(cbToWrite, (pImage->PCHSGeometry.cSectors - uSector)*512);
1279
1280	if (pImage->pAllocationBitmap[iIndexInAllocationTable] == 0)
1281	{
1282	if (fWrite & VD_WRITE_NO_ALLOC)
1283	{
1284	pcbPreRead = uSector 512;
1285	pcbPostRead = pImage->PCHSGeometry.cSectors 512 - cbToWrite - *pcbPreRead;
1286
1287	if (pcbWriteProcess)
1288	*pcbWriteProcess = cbToWrite;
1289	return VERR_VD_BLOCK_FREE;
1290	}
1291
1292	/* Allocate new chunk in the file. */
1293	Assert(uSector == 0);
1294	AssertMsg(pImage->cbFileCurrent % 512 == 0, ("File size is not a multiple of 512\n"));
1295	pImage->pAllocationBitmap[iIndexInAllocationTable] = (uint32_t)(pImage->cbFileCurrent / 512);
1296	pImage->cbFileCurrent += pImage->PCHSGeometry.cSectors * 512;
1297	pImage->fAllocationBitmapChanged = true;
1298	uOffsetInFile = (uint64_t)pImage->pAllocationBitmap[iIndexInAllocationTable] * 512;
1299
1300	/*
1301	* Write the new block at the current end of the file.
1302	*/
1303	rc = vdIfIoIntFileWriteUserAsync(pImage->pIfIo, pImage->pStorage,
1304	uOffsetInFile, pIoCtx, cbToWrite, NULL, NULL);
1305	if (RT_SUCCESS(rc) \|\| (rc == VERR_VD_ASYNC_IO_IN_PROGRESS))
1306	{
1307	/* Write the changed allocation bitmap entry. */
1308	/** @todo: Error handling. */
1309	rc = vdIfIoIntFileWriteMetaAsync(pImage->pIfIo, pImage->pStorage,
1310	sizeof(ParallelsHeader) + iIndexInAllocationTable * sizeof(uint32_t),
1311	&pImage->pAllocationBitmap[iIndexInAllocationTable],
1312	sizeof(uint32_t), pIoCtx,
1313	NULL, NULL);
1314	}
1315
1316	*pcbPreRead = 0;
1317	*pcbPostRead = 0;
1318	}
1319	else
1320	{
1321	uOffsetInFile = (pImage->pAllocationBitmap[iIndexInAllocationTable] + uSector) * 512;
1322	rc = vdIfIoIntFileWriteUserAsync(pImage->pIfIo, pImage->pStorage,
1323	uOffsetInFile, pIoCtx, cbToWrite, NULL, NULL);
1324	}
1325	}
1326
1327	if (pcbWriteProcess)
1328	*pcbWriteProcess = cbToWrite;
1329
1330	LogFlowFunc(("returns %Rrc\n", rc));
1331	return rc;
1332	}
1333
1334	/** @copydoc VBOXHDDBACKEND::pfnAsyncFlush */
1335	static int parallelsAsyncFlush(void *pBackendData, PVDIOCTX pIoCtx)
1336	{
1337	int rc = VINF_SUCCESS;
1338	PPARALLELSIMAGE pImage = (PPARALLELSIMAGE)pBackendData;
1339
1340	LogFlowFunc(("pImage=#%p\n", pImage));
1341
1342	/* Flush the file, everything is up to date already. */
1343	rc = vdIfIoIntFileFlushAsync(pImage->pIfIo, pImage->pStorage, pIoCtx, NULL, NULL);
1344
1345	LogFlowFunc(("returns %Rrc\n", rc));
1346	return rc;
1347	}
1348
1349
1350	VBOXHDDBACKEND g_ParallelsBackend =
1351	{
1352	/* pszBackendName */
1353	"Parallels",
1354	/* cbSize */
1355	sizeof(VBOXHDDBACKEND),
1356	/* uBackendCaps */
1357	VD_CAP_FILE \| VD_CAP_ASYNC \| VD_CAP_VFS \| VD_CAP_CREATE_DYNAMIC \| VD_CAP_DIFF,
1358	/* paFileExtensions */
1359	s_aParallelsFileExtensions,
1360	/* paConfigInfo */
1361	NULL,
1362	/* hPlugin */
1363	NIL_RTLDRMOD,
1364	/* pfnCheckIfValid */
1365	parallelsCheckIfValid,
1366	/* pfnOpen */
1367	parallelsOpen,
1368	/* pfnCreate */
1369	parallelsCreate,
1370	/* pfnRename */
1371	parallelsRename,
1372	/* pfnClose */
1373	parallelsClose,
1374	/* pfnRead */
1375	parallelsRead,
1376	/* pfnWrite */
1377	parallelsWrite,
1378	/* pfnFlush */
1379	parallelsFlush,
1380	/* pfnGetVersion */
1381	parallelsGetVersion,
1382	/* pfnGetSize */
1383	parallelsGetSize,
1384	/* pfnGetFileSize */
1385	parallelsGetFileSize,
1386	/* pfnGetPCHSGeometry */
1387	parallelsGetPCHSGeometry,
1388	/* pfnSetPCHSGeometry */
1389	parallelsSetPCHSGeometry,
1390	/* pfnGetLCHSGeometry */
1391	parallelsGetLCHSGeometry,
1392	/* pfnSetLCHSGeometry */
1393	parallelsSetLCHSGeometry,
1394	/* pfnGetImageFlags */
1395	parallelsGetImageFlags,
1396	/* pfnGetOpenFlags */
1397	parallelsGetOpenFlags,
1398	/* pfnSetOpenFlags */
1399	parallelsSetOpenFlags,
1400	/* pfnGetComment */
1401	parallelsGetComment,
1402	/* pfnSetComment */
1403	parallelsSetComment,
1404	/* pfnGetUuid */
1405	parallelsGetUuid,
1406	/* pfnSetUuid */
1407	parallelsSetUuid,
1408	/* pfnGetModificationUuid */
1409	parallelsGetModificationUuid,
1410	/* pfnSetModificationUuid */
1411	parallelsSetModificationUuid,
1412	/* pfnGetParentUuid */
1413	parallelsGetParentUuid,
1414	/* pfnSetParentUuid */
1415	parallelsSetParentUuid,
1416	/* pfnGetParentModificationUuid */
1417	parallelsGetParentModificationUuid,
1418	/* pfnSetParentModificationUuid */
1419	parallelsSetParentModificationUuid,
1420	/* pfnDump */
1421	parallelsDump,
1422	/* pfnGetTimeStamp */
1423	NULL,
1424	/* pfnGetParentTimeStamp */
1425	NULL,
1426	/* pfnSetParentTimeStamp */
1427	NULL,
1428	/* pfnGetParentFilename */
1429	NULL,
1430	/* pfnSetParentFilename */
1431	NULL,
1432	/* pfnAsyncRead */
1433	parallelsAsyncRead,
1434	/* pfnAsyncWrite */
1435	parallelsAsyncWrite,
1436	/* pfnAsyncFlush */
1437	parallelsAsyncFlush,
1438	/* pfnComposeLocation */
1439	genericFileComposeLocation,
1440	/* pfnComposeName */
1441	genericFileComposeName,
1442	/* pfnCompact */
1443	NULL,
1444	/* pfnResize */
1445	NULL
1446	};

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source: vbox/trunk/src/VBox/Storage/Parallels.cpp@ 40685

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