RAW.cpp@ 44252

Last change on this file since 44252 was 44252, checked in by vboxsync, 12 years ago
Storage/Backends: async/sync I/O unification, remove separate entries for sync and async I/O callbacks, remove unused code
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1	/* $Id: RAW.cpp 44252 2013-01-08 13:23:54Z vboxsync $ */
2	/** @file
3	* RawHDDCore - Raw Disk image, Core Code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2010 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_VD_RAW
22	#include <VBox/vd-plugin.h>
23	#include <VBox/err.h>
24
25	#include <VBox/log.h>
26	#include <iprt/assert.h>
27	#include <iprt/alloc.h>
28	#include <iprt/path.h>
29
30	/*******************************************************************************
31	* Constants And Macros, Structures and Typedefs *
32	*******************************************************************************/
33
34	/**
35	* Raw image data structure.
36	*/
37	typedef struct RAWIMAGE
38	{
39	/** Image name. */
40	const char *pszFilename;
41	/** Storage handle. */
42	PVDIOSTORAGE pStorage;
43
44	/** Pointer to the per-disk VD interface list. */
45	PVDINTERFACE pVDIfsDisk;
46	/** Pointer to the per-image VD interface list. */
47	PVDINTERFACE pVDIfsImage;
48	/** Error interface. */
49	PVDINTERFACEERROR pIfError;
50	/** I/O interface. */
51	PVDINTERFACEIOINT pIfIo;
52
53	/** Open flags passed by VBoxHD layer. */
54	unsigned uOpenFlags;
55	/** Image flags defined during creation or determined during open. */
56	unsigned uImageFlags;
57	/** Total size of the image. */
58	uint64_t cbSize;
59	/** Position in the image (only truly used for sequential access). */
60	uint64_t offAccess;
61	/** Flag if this is a newly created image. */
62	bool fCreate;
63	/** Physical geometry of this image. */
64	VDGEOMETRY PCHSGeometry;
65	/** Logical geometry of this image. */
66	VDGEOMETRY LCHSGeometry;
67
68	} RAWIMAGE, *PRAWIMAGE;
69
70
71	/** Size of write operations when filling an image with zeroes. */
72	#define RAW_FILL_SIZE (128 * _1K)
73
74	/** The maximum reasonable size of a floppy image (big format 2.88MB medium). */
75	#define RAW_MAX_FLOPPY_IMG_SIZE (512 * 82 * 48 * 2)
76
77	/*******************************************************************************
78	* Static Variables *
79	*******************************************************************************/
80
81	/** NULL-terminated array of supported file extensions. */
82	static const VDFILEEXTENSION s_aRawFileExtensions[] =
83	{
84	{"iso", VDTYPE_DVD},
85	{"cdr", VDTYPE_DVD},
86	{"img", VDTYPE_FLOPPY},
87	{"ima", VDTYPE_FLOPPY},
88	{"dsk", VDTYPE_FLOPPY},
89	{"vfd", VDTYPE_FLOPPY},
90	{NULL, VDTYPE_INVALID}
91	};
92
93	/*******************************************************************************
94	* Internal Functions *
95	*******************************************************************************/
96
97	/**
98	* Internal. Flush image data to disk.
99	*/
100	static int rawFlushImage(PRAWIMAGE pImage)
101	{
102	int rc = VINF_SUCCESS;
103
104	if ( pImage->pStorage
105	&& !(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
106	rc = vdIfIoIntFileFlushSync(pImage->pIfIo, pImage->pStorage);
107
108	return rc;
109	}
110
111	/**
112	* Internal. Free all allocated space for representing an image except pImage,
113	* and optionally delete the image from disk.
114	*/
115	static int rawFreeImage(PRAWIMAGE pImage, bool fDelete)
116	{
117	int rc = VINF_SUCCESS;
118
119	/* Freeing a never allocated image (e.g. because the open failed) is
120	* not signalled as an error. After all nothing bad happens. */
121	if (pImage)
122	{
123	if (pImage->pStorage)
124	{
125	/* No point updating the file that is deleted anyway. */
126	if (!fDelete)
127	{
128	/* For newly created images in sequential mode fill it to
129	* the nominal size. */
130	if ( pImage->uOpenFlags & VD_OPEN_FLAGS_SEQUENTIAL
131	&& !(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
132	&& pImage->fCreate)
133	{
134	/* Fill rest of image with zeroes, a must for sequential
135	* images to reach the nominal size. */
136	uint64_t uOff;
137	void *pvBuf = RTMemTmpAllocZ(RAW_FILL_SIZE);
138	if (!pvBuf)
139	goto out;
140
141	uOff = pImage->offAccess;
142	/* Write data to all image blocks. */
143	while (uOff < pImage->cbSize)
144	{
145	unsigned cbChunk = (unsigned)RT_MIN(pImage->cbSize,
146	RAW_FILL_SIZE);
147
148	rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage,
149	uOff, pvBuf, cbChunk);
150	if (RT_FAILURE(rc))
151	goto out;
152
153	uOff += cbChunk;
154	}
155	out:
156	if (pvBuf)
157	RTMemTmpFree(pvBuf);
158	}
159	rawFlushImage(pImage);
160	}
161
162	vdIfIoIntFileClose(pImage->pIfIo, pImage->pStorage);
163	pImage->pStorage = NULL;
164	}
165
166	if (fDelete && pImage->pszFilename)
167	vdIfIoIntFileDelete(pImage->pIfIo, pImage->pszFilename);
168	}
169
170	LogFlowFunc(("returns %Rrc\n", rc));
171	return rc;
172	}
173
174	/**
175	* Internal: Open an image, constructing all necessary data structures.
176	*/
177	static int rawOpenImage(PRAWIMAGE pImage, unsigned uOpenFlags)
178	{
179	int rc;
180
181	pImage->uOpenFlags = uOpenFlags;
182	pImage->fCreate = false;
183
184	pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk);
185	pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage);
186	AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER);
187
188	/*
189	* Open the image.
190	*/
191	rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename,
192	VDOpenFlagsToFileOpenFlags(uOpenFlags,
193	false /* fCreate */),
194	&pImage->pStorage);
195	if (RT_FAILURE(rc))
196	{
197	/* Do NOT signal an appropriate error here, as the VD layer has the
198	* choice of retrying the open if it failed. */
199	goto out;
200	}
201
202	rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &pImage->cbSize);
203	if (RT_FAILURE(rc))
204	goto out;
205	if (pImage->cbSize % 512)
206	{
207	rc = VERR_VD_RAW_INVALID_HEADER;
208	goto out;
209	}
210	pImage->uImageFlags \|= VD_IMAGE_FLAGS_FIXED;
211
212	out:
213	if (RT_FAILURE(rc))
214	rawFreeImage(pImage, false);
215	return rc;
216	}
217
218	/**
219	* Internal: Create a raw image.
220	*/
221	static int rawCreateImage(PRAWIMAGE pImage, uint64_t cbSize,
222	unsigned uImageFlags, const char *pszComment,
223	PCVDGEOMETRY pPCHSGeometry,
224	PCVDGEOMETRY pLCHSGeometry, unsigned uOpenFlags,
225	PFNVDPROGRESS pfnProgress, void *pvUser,
226	unsigned uPercentStart, unsigned uPercentSpan)
227	{
228	int rc;
229	RTFOFF cbFree = 0;
230	uint64_t uOff;
231	void *pvBuf = NULL;
232	int32_t fOpen;
233
234	uImageFlags \|= VD_IMAGE_FLAGS_FIXED;
235
236	pImage->uOpenFlags = uOpenFlags & ~VD_OPEN_FLAGS_READONLY;
237
238	pImage->uImageFlags = uImageFlags;
239	pImage->fCreate = true;
240	pImage->PCHSGeometry = *pPCHSGeometry;
241	pImage->LCHSGeometry = *pLCHSGeometry;
242
243	pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk);
244	pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage);
245	AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER);
246
247	if (uImageFlags & VD_IMAGE_FLAGS_DIFF)
248	{
249	rc = vdIfError(pImage->pIfError, VERR_VD_RAW_INVALID_TYPE, RT_SRC_POS, N_("Raw: cannot create diff image '%s'"), pImage->pszFilename);
250	goto out;
251	}
252
253	/* Create image file. */
254	fOpen = VDOpenFlagsToFileOpenFlags(pImage->uOpenFlags, true /* fCreate */);
255	if (uOpenFlags & VD_OPEN_FLAGS_SEQUENTIAL)
256	fOpen &= ~RTFILE_O_READ;
257	rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename, fOpen, &pImage->pStorage);
258	if (RT_FAILURE(rc))
259	{
260	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS, N_("Raw: cannot create image '%s'"), pImage->pszFilename);
261	goto out;
262	}
263
264	if (!(uOpenFlags & VD_OPEN_FLAGS_SEQUENTIAL))
265	{
266	/* Check the free space on the disk and leave early if there is not
267	* sufficient space available. */
268	rc = vdIfIoIntFileGetFreeSpace(pImage->pIfIo, pImage->pszFilename, &cbFree);
269	if (RT_SUCCESS(rc) /* ignore errors */ && ((uint64_t)cbFree < cbSize))
270	{
271	rc = vdIfError(pImage->pIfError, VERR_DISK_FULL, RT_SRC_POS, N_("Raw: disk would overflow creating image '%s'"), pImage->pszFilename);
272	goto out;
273	}
274
275	/* Allocate & commit whole file if fixed image, it must be more
276	* effective than expanding file by write operations. */
277	rc = vdIfIoIntFileSetSize(pImage->pIfIo, pImage->pStorage, cbSize);
278	if (RT_FAILURE(rc))
279	{
280	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS, N_("Raw: setting image size failed for '%s'"), pImage->pszFilename);
281	goto out;
282	}
283
284	/* Fill image with zeroes. We do this for every fixed-size image since
285	* on some systems (for example Windows Vista), it takes ages to write
286	* a block near the end of a sparse file and the guest could complain
287	* about an ATA timeout. */
288	pvBuf = RTMemTmpAllocZ(RAW_FILL_SIZE);
289	if (!pvBuf)
290	{
291	rc = VERR_NO_MEMORY;
292	goto out;
293	}
294
295	uOff = 0;
296	/* Write data to all image blocks. */
297	while (uOff < cbSize)
298	{
299	unsigned cbChunk = (unsigned)RT_MIN(cbSize, RAW_FILL_SIZE);
300
301	rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage, uOff,
302	pvBuf, cbChunk);
303	if (RT_FAILURE(rc))
304	{
305	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS, N_("Raw: writing block failed for '%s'"), pImage->pszFilename);
306	goto out;
307	}
308
309	uOff += cbChunk;
310
311	if (pfnProgress)
312	{
313	rc = pfnProgress(pvUser,
314	uPercentStart + uOff * uPercentSpan * 98 / (cbSize * 100));
315	if (RT_FAILURE(rc))
316	goto out;
317	}
318	}
319	}
320
321	if (RT_SUCCESS(rc) && pfnProgress)
322	pfnProgress(pvUser, uPercentStart + uPercentSpan * 98 / 100);
323
324	pImage->cbSize = cbSize;
325
326	rc = rawFlushImage(pImage);
327
328	out:
329	if (pvBuf)
330	RTMemTmpFree(pvBuf);
331
332	if (RT_SUCCESS(rc) && pfnProgress)
333	pfnProgress(pvUser, uPercentStart + uPercentSpan);
334
335	if (RT_FAILURE(rc))
336	rawFreeImage(pImage, rc != VERR_ALREADY_EXISTS);
337	return rc;
338	}
339
340
341	/** @copydoc VBOXHDDBACKEND::pfnCheckIfValid */
342	static int rawCheckIfValid(const char *pszFilename, PVDINTERFACE pVDIfsDisk,
343	PVDINTERFACE pVDIfsImage, VDTYPE *penmType)
344	{
345	LogFlowFunc(("pszFilename=\"%s\" pVDIfsDisk=%#p pVDIfsImage=%#p\n", pszFilename, pVDIfsDisk, pVDIfsImage));
346	PVDIOSTORAGE pStorage = NULL;
347	uint64_t cbFile;
348	int rc = VINF_SUCCESS;
349	char *pszExtension = NULL;
350
351	PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage);
352	AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER);
353
354	if ( !VALID_PTR(pszFilename)
355	\|\| !*pszFilename)
356	{
357	rc = VERR_INVALID_PARAMETER;
358	goto out;
359	}
360
361	pszExtension = RTPathExt(pszFilename);
362
363	/*
364	* Open the file and read the footer.
365	*/
366	rc = vdIfIoIntFileOpen(pIfIo, pszFilename,
367	VDOpenFlagsToFileOpenFlags(VD_OPEN_FLAGS_READONLY,
368	false /* fCreate */),
369	&pStorage);
370	if (RT_SUCCESS(rc))
371	rc = vdIfIoIntFileGetSize(pIfIo, pStorage, &cbFile);
372
373	/* Try to guess the image type based on the extension. */
374	if ( RT_SUCCESS(rc)
375	&& pszExtension)
376	{
377	if ( !RTStrICmp(pszExtension, ".iso")
378	\|\| !RTStrICmp(pszExtension, ".cdr")) /* DVD images. */
379	{
380	/* Note that there are ISO images smaller than 1 MB; it is impossible to distinguish
381	* between raw floppy and CD images based on their size (and cannot be reliably done
382	* based on contents, either).
383	*/
384	if (cbFile > 32768 && !(cbFile % 2048))
385	{
386	*penmType = VDTYPE_DVD;
387	rc = VINF_SUCCESS;
388	}
389	else
390	rc = VERR_VD_RAW_INVALID_HEADER;
391	}
392	else if ( !RTStrICmp(pszExtension, ".img")
393	\|\| !RTStrICmp(pszExtension, ".ima")
394	\|\| !RTStrICmp(pszExtension, ".dsk")
395	\|\| !RTStrICmp(pszExtension, ".vfd")) /* Floppy images */
396	{
397	if (!(cbFile % 512) && cbFile <= RAW_MAX_FLOPPY_IMG_SIZE)
398	{
399	*penmType = VDTYPE_FLOPPY;
400	rc = VINF_SUCCESS;
401	}
402	else
403	rc = VERR_VD_RAW_INVALID_HEADER;
404	}
405	else
406	rc = VERR_VD_RAW_INVALID_HEADER;
407	}
408	else
409	rc = VERR_VD_RAW_INVALID_HEADER;
410
411	if (pStorage)
412	vdIfIoIntFileClose(pIfIo, pStorage);
413
414	out:
415	LogFlowFunc(("returns %Rrc\n", rc));
416	return rc;
417	}
418
419	/** @copydoc VBOXHDDBACKEND::pfnOpen */
420	static int rawOpen(const char *pszFilename, unsigned uOpenFlags,
421	PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
422	VDTYPE enmType, void **ppBackendData)
423	{
424	LogFlowFunc(("pszFilename=\"%s\" uOpenFlags=%#x pVDIfsDisk=%#p pVDIfsImage=%#p ppBackendData=%#p\n", pszFilename, uOpenFlags, pVDIfsDisk, pVDIfsImage, ppBackendData));
425	int rc;
426	PRAWIMAGE pImage;
427
428	/* Check open flags. All valid flags are supported. */
429	if (uOpenFlags & ~VD_OPEN_FLAGS_MASK)
430	{
431	rc = VERR_INVALID_PARAMETER;
432	goto out;
433	}
434
435	/* Check remaining arguments. */
436	if ( !VALID_PTR(pszFilename)
437	\|\| !*pszFilename)
438	{
439	rc = VERR_INVALID_PARAMETER;
440	goto out;
441	}
442
443
444	pImage = (PRAWIMAGE)RTMemAllocZ(sizeof(RAWIMAGE));
445	if (!pImage)
446	{
447	rc = VERR_NO_MEMORY;
448	goto out;
449	}
450	pImage->pszFilename = pszFilename;
451	pImage->pStorage = NULL;
452	pImage->pVDIfsDisk = pVDIfsDisk;
453	pImage->pVDIfsImage = pVDIfsImage;
454
455	rc = rawOpenImage(pImage, uOpenFlags);
456	if (RT_SUCCESS(rc))
457	*ppBackendData = pImage;
458	else
459	RTMemFree(pImage);
460
461	out:
462	LogFlowFunc(("returns %Rrc (pBackendData=%#p)\n", rc, *ppBackendData));
463	return rc;
464	}
465
466	/** @copydoc VBOXHDDBACKEND::pfnCreate */
467	static int rawCreate(const char *pszFilename, uint64_t cbSize,
468	unsigned uImageFlags, const char *pszComment,
469	PCVDGEOMETRY pPCHSGeometry, PCVDGEOMETRY pLCHSGeometry,
470	PCRTUUID pUuid, unsigned uOpenFlags,
471	unsigned uPercentStart, unsigned uPercentSpan,
472	PVDINTERFACE pVDIfsDisk, 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", pszFilename, cbSize, uImageFlags, pszComment, pPCHSGeometry, pLCHSGeometry, pUuid, uOpenFlags, uPercentStart, uPercentSpan, pVDIfsDisk, pVDIfsImage, pVDIfsOperation, ppBackendData));
476	int rc;
477	PRAWIMAGE pImage;
478
479	PFNVDPROGRESS pfnProgress = NULL;
480	void *pvUser = NULL;
481	PVDINTERFACEPROGRESS pIfProgress = VDIfProgressGet(pVDIfsOperation);
482	if (pIfProgress)
483	{
484	pfnProgress = pIfProgress->pfnProgress;
485	pvUser = pIfProgress->Core.pvUser;
486	}
487
488	/* Check open flags. All valid flags are supported. */
489	if (uOpenFlags & ~VD_OPEN_FLAGS_MASK)
490	{
491	rc = VERR_INVALID_PARAMETER;
492	goto out;
493	}
494
495	/* Check remaining arguments. */
496	if ( !VALID_PTR(pszFilename)
497	\|\| !*pszFilename
498	\|\| !VALID_PTR(pPCHSGeometry)
499	\|\| !VALID_PTR(pLCHSGeometry))
500	{
501	rc = VERR_INVALID_PARAMETER;
502	goto out;
503	}
504
505	pImage = (PRAWIMAGE)RTMemAllocZ(sizeof(RAWIMAGE));
506	if (!pImage)
507	{
508	rc = VERR_NO_MEMORY;
509	goto out;
510	}
511	pImage->pszFilename = pszFilename;
512	pImage->pStorage = NULL;
513	pImage->pVDIfsDisk = pVDIfsDisk;
514	pImage->pVDIfsImage = pVDIfsImage;
515
516	rc = rawCreateImage(pImage, cbSize, uImageFlags, pszComment,
517	pPCHSGeometry, pLCHSGeometry, uOpenFlags,
518	pfnProgress, pvUser, uPercentStart, uPercentSpan);
519	if (RT_SUCCESS(rc))
520	{
521	/* So far the image is opened in read/write mode. Make sure the
522	* image is opened in read-only mode if the caller requested that. */
523	if (uOpenFlags & VD_OPEN_FLAGS_READONLY)
524	{
525	rawFreeImage(pImage, false);
526	rc = rawOpenImage(pImage, uOpenFlags);
527	if (RT_FAILURE(rc))
528	{
529	RTMemFree(pImage);
530	goto out;
531	}
532	}
533	*ppBackendData = pImage;
534	}
535	else
536	RTMemFree(pImage);
537
538	out:
539	LogFlowFunc(("returns %Rrc (pBackendData=%#p)\n", rc, *ppBackendData));
540	return rc;
541	}
542
543	/** @copydoc VBOXHDDBACKEND::pfnRename */
544	static int rawRename(void pBackendData, const char pszFilename)
545	{
546	LogFlowFunc(("pBackendData=%#p pszFilename=%#p\n", pBackendData, pszFilename));
547	int rc = VINF_SUCCESS;
548	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
549
550	/* Check arguments. */
551	if ( !pImage
552	\|\| !pszFilename
553	\|\| !*pszFilename)
554	{
555	rc = VERR_INVALID_PARAMETER;
556	goto out;
557	}
558
559	/* Close the image. */
560	rc = rawFreeImage(pImage, false);
561	if (RT_FAILURE(rc))
562	goto out;
563
564	/* Rename the file. */
565	rc = vdIfIoIntFileMove(pImage->pIfIo, pImage->pszFilename, pszFilename, 0);
566	if (RT_FAILURE(rc))
567	{
568	/* The move failed, try to reopen the original image. */
569	int rc2 = rawOpenImage(pImage, pImage->uOpenFlags);
570	if (RT_FAILURE(rc2))
571	rc = rc2;
572
573	goto out;
574	}
575
576	/* Update pImage with the new information. */
577	pImage->pszFilename = pszFilename;
578
579	/* Open the old image with new name. */
580	rc = rawOpenImage(pImage, pImage->uOpenFlags);
581	if (RT_FAILURE(rc))
582	goto out;
583
584	out:
585	LogFlowFunc(("returns %Rrc\n", rc));
586	return rc;
587	}
588
589	/** @copydoc VBOXHDDBACKEND::pfnClose */
590	static int rawClose(void *pBackendData, bool fDelete)
591	{
592	LogFlowFunc(("pBackendData=%#p fDelete=%d\n", pBackendData, fDelete));
593	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
594	int rc;
595
596	rc = rawFreeImage(pImage, fDelete);
597	RTMemFree(pImage);
598
599	LogFlowFunc(("returns %Rrc\n", rc));
600	return rc;
601	}
602
603	/** @copydoc VBOXHDDBACKEND::pfnRead */
604	static int rawRead(void *pBackendData, uint64_t uOffset, size_t cbRead,
605	PVDIOCTX pIoCtx, size_t *pcbActuallyRead)
606	{
607	int rc = VINF_SUCCESS;
608	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
609
610	rc = vdIfIoIntFileReadUser(pImage->pIfIo, pImage->pStorage, uOffset,
611	pIoCtx, cbRead);
612	if (RT_SUCCESS(rc))
613	*pcbActuallyRead = cbRead;
614
615	return rc;
616	}
617
618	/** @copydoc VBOXHDDBACKEND::pfnWrite */
619	static int rawWrite(void *pBackendData, uint64_t uOffset, size_t cbWrite,
620	PVDIOCTX pIoCtx, size_t pcbWriteProcess, size_t pcbPreRead,
621	size_t *pcbPostRead, unsigned fWrite)
622	{
623	int rc = VINF_SUCCESS;
624	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
625
626	rc = vdIfIoIntFileWriteUser(pImage->pIfIo, pImage->pStorage, uOffset,
627	pIoCtx, cbWrite, NULL, NULL);
628	if (RT_SUCCESS(rc))
629	{
630	*pcbWriteProcess = cbWrite;
631	*pcbPostRead = 0;
632	*pcbPreRead = 0;
633	}
634
635	return rc;
636	}
637
638	/** @copydoc VBOXHDDBACKEND::pfnFlush */
639	static int rawFlush(void *pBackendData, PVDIOCTX pIoCtx)
640	{
641	int rc = VINF_SUCCESS;
642	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
643
644	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
645	rc = vdIfIoIntFileFlush(pImage->pIfIo, pImage->pStorage, pIoCtx,
646	NULL, NULL);
647
648	return rc;
649	}
650
651	/** @copydoc VBOXHDDBACKEND::pfnGetVersion */
652	static unsigned rawGetVersion(void *pBackendData)
653	{
654	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
655	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
656
657	AssertPtr(pImage);
658
659	if (pImage)
660	return 1;
661	else
662	return 0;
663	}
664
665	/** @copydoc VBOXHDDBACKEND::pfnGetSize */
666	static uint64_t rawGetSize(void *pBackendData)
667	{
668	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
669	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
670	uint64_t cb = 0;
671
672	AssertPtr(pImage);
673
674	if (pImage && pImage->pStorage)
675	cb = pImage->cbSize;
676
677	LogFlowFunc(("returns %llu\n", cb));
678	return cb;
679	}
680
681	/** @copydoc VBOXHDDBACKEND::pfnGetFileSize */
682	static uint64_t rawGetFileSize(void *pBackendData)
683	{
684	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
685	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
686	uint64_t cb = 0;
687
688	AssertPtr(pImage);
689
690	if (pImage)
691	{
692	uint64_t cbFile;
693	if (pImage->pStorage)
694	{
695	int rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &cbFile);
696	if (RT_SUCCESS(rc))
697	cb += cbFile;
698	}
699	}
700
701	LogFlowFunc(("returns %lld\n", cb));
702	return cb;
703	}
704
705	/** @copydoc VBOXHDDBACKEND::pfnGetPCHSGeometry */
706	static int rawGetPCHSGeometry(void *pBackendData,
707	PVDGEOMETRY pPCHSGeometry)
708	{
709	LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p\n", pBackendData, pPCHSGeometry));
710	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
711	int rc;
712
713	AssertPtr(pImage);
714
715	if (pImage)
716	{
717	if (pImage->PCHSGeometry.cCylinders)
718	{
719	*pPCHSGeometry = pImage->PCHSGeometry;
720	rc = VINF_SUCCESS;
721	}
722	else
723	rc = VERR_VD_GEOMETRY_NOT_SET;
724	}
725	else
726	rc = VERR_VD_NOT_OPENED;
727
728	LogFlowFunc(("returns %Rrc (PCHS=%u/%u/%u)\n", rc, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
729	return rc;
730	}
731
732	/** @copydoc VBOXHDDBACKEND::pfnSetPCHSGeometry */
733	static int rawSetPCHSGeometry(void *pBackendData,
734	PCVDGEOMETRY pPCHSGeometry)
735	{
736	LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p PCHS=%u/%u/%u\n", pBackendData, pPCHSGeometry, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
737	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
738	int rc;
739
740	AssertPtr(pImage);
741
742	if (pImage)
743	{
744	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
745	{
746	rc = VERR_VD_IMAGE_READ_ONLY;
747	goto out;
748	}
749
750	pImage->PCHSGeometry = *pPCHSGeometry;
751	rc = VINF_SUCCESS;
752	}
753	else
754	rc = VERR_VD_NOT_OPENED;
755
756	out:
757	LogFlowFunc(("returns %Rrc\n", rc));
758	return rc;
759	}
760
761	/** @copydoc VBOXHDDBACKEND::pfnGetLCHSGeometry */
762	static int rawGetLCHSGeometry(void *pBackendData,
763	PVDGEOMETRY pLCHSGeometry)
764	{
765	LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p\n", pBackendData, pLCHSGeometry));
766	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
767	int rc;
768
769	AssertPtr(pImage);
770
771	if (pImage)
772	{
773	if (pImage->LCHSGeometry.cCylinders)
774	{
775	*pLCHSGeometry = pImage->LCHSGeometry;
776	rc = VINF_SUCCESS;
777	}
778	else
779	rc = VERR_VD_GEOMETRY_NOT_SET;
780	}
781	else
782	rc = VERR_VD_NOT_OPENED;
783
784	LogFlowFunc(("returns %Rrc (LCHS=%u/%u/%u)\n", rc, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
785	return rc;
786	}
787
788	/** @copydoc VBOXHDDBACKEND::pfnSetLCHSGeometry */
789	static int rawSetLCHSGeometry(void *pBackendData,
790	PCVDGEOMETRY pLCHSGeometry)
791	{
792	LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p LCHS=%u/%u/%u\n", pBackendData, pLCHSGeometry, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
793	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
794	int rc;
795
796	AssertPtr(pImage);
797
798	if (pImage)
799	{
800	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
801	{
802	rc = VERR_VD_IMAGE_READ_ONLY;
803	goto out;
804	}
805
806	pImage->LCHSGeometry = *pLCHSGeometry;
807	rc = VINF_SUCCESS;
808	}
809	else
810	rc = VERR_VD_NOT_OPENED;
811
812	out:
813	LogFlowFunc(("returns %Rrc\n", rc));
814	return rc;
815	}
816
817	/** @copydoc VBOXHDDBACKEND::pfnGetImageFlags */
818	static unsigned rawGetImageFlags(void *pBackendData)
819	{
820	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
821	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
822	unsigned uImageFlags;
823
824	AssertPtr(pImage);
825
826	if (pImage)
827	uImageFlags = pImage->uImageFlags;
828	else
829	uImageFlags = 0;
830
831	LogFlowFunc(("returns %#x\n", uImageFlags));
832	return uImageFlags;
833	}
834
835	/** @copydoc VBOXHDDBACKEND::pfnGetOpenFlags */
836	static unsigned rawGetOpenFlags(void *pBackendData)
837	{
838	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
839	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
840	unsigned uOpenFlags;
841
842	AssertPtr(pImage);
843
844	if (pImage)
845	uOpenFlags = pImage->uOpenFlags;
846	else
847	uOpenFlags = 0;
848
849	LogFlowFunc(("returns %#x\n", uOpenFlags));
850	return uOpenFlags;
851	}
852
853	/** @copydoc VBOXHDDBACKEND::pfnSetOpenFlags */
854	static int rawSetOpenFlags(void *pBackendData, unsigned uOpenFlags)
855	{
856	LogFlowFunc(("pBackendData=%#p\n uOpenFlags=%#x", pBackendData, uOpenFlags));
857	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
858	int rc;
859
860	/* Image must be opened and the new flags must be valid. */
861	if (!pImage \|\| (uOpenFlags & ~( VD_OPEN_FLAGS_READONLY \| VD_OPEN_FLAGS_INFO
862	\| VD_OPEN_FLAGS_ASYNC_IO \| VD_OPEN_FLAGS_SHAREABLE
863	\| VD_OPEN_FLAGS_SEQUENTIAL \| VD_OPEN_FLAGS_SKIP_CONSISTENCY_CHECKS)))
864	{
865	rc = VERR_INVALID_PARAMETER;
866	goto out;
867	}
868
869	/* Implement this operation via reopening the image. */
870	rc = rawFreeImage(pImage, false);
871	if (RT_FAILURE(rc))
872	goto out;
873	rc = rawOpenImage(pImage, uOpenFlags);
874
875	out:
876	LogFlowFunc(("returns %Rrc\n", rc));
877	return rc;
878	}
879
880	/** @copydoc VBOXHDDBACKEND::pfnGetComment */
881	static int rawGetComment(void pBackendData, char pszComment,
882	size_t cbComment)
883	{
884	LogFlowFunc(("pBackendData=%#p pszComment=%#p cbComment=%zu\n", pBackendData, pszComment, cbComment));
885	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
886	int rc;
887
888	AssertPtr(pImage);
889
890	if (pImage)
891	rc = VERR_NOT_SUPPORTED;
892	else
893	rc = VERR_VD_NOT_OPENED;
894
895	LogFlowFunc(("returns %Rrc comment='%s'\n", rc, pszComment));
896	return rc;
897	}
898
899	/** @copydoc VBOXHDDBACKEND::pfnSetComment */
900	static int rawSetComment(void pBackendData, const char pszComment)
901	{
902	LogFlowFunc(("pBackendData=%#p pszComment=\"%s\"\n", pBackendData, pszComment));
903	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
904	int rc;
905
906	AssertPtr(pImage);
907
908	if (pImage)
909	{
910	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
911	rc = VERR_VD_IMAGE_READ_ONLY;
912	else
913	rc = VERR_NOT_SUPPORTED;
914	}
915	else
916	rc = VERR_VD_NOT_OPENED;
917
918	LogFlowFunc(("returns %Rrc\n", rc));
919	return rc;
920	}
921
922	/** @copydoc VBOXHDDBACKEND::pfnGetUuid */
923	static int rawGetUuid(void *pBackendData, PRTUUID pUuid)
924	{
925	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
926	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
927	int rc;
928
929	AssertPtr(pImage);
930
931	if (pImage)
932	rc = VERR_NOT_SUPPORTED;
933	else
934	rc = VERR_VD_NOT_OPENED;
935
936	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
937	return rc;
938	}
939
940	/** @copydoc VBOXHDDBACKEND::pfnSetUuid */
941	static int rawSetUuid(void *pBackendData, PCRTUUID pUuid)
942	{
943	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
944	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
945	int rc;
946
947	LogFlowFunc(("%RTuuid\n", pUuid));
948	AssertPtr(pImage);
949
950	if (pImage)
951	{
952	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
953	rc = VERR_NOT_SUPPORTED;
954	else
955	rc = VERR_VD_IMAGE_READ_ONLY;
956	}
957	else
958	rc = VERR_VD_NOT_OPENED;
959
960	LogFlowFunc(("returns %Rrc\n", rc));
961	return rc;
962	}
963
964	/** @copydoc VBOXHDDBACKEND::pfnGetModificationUuid */
965	static int rawGetModificationUuid(void *pBackendData, PRTUUID pUuid)
966	{
967	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
968	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
969	int rc;
970
971	AssertPtr(pImage);
972
973	if (pImage)
974	rc = VERR_NOT_SUPPORTED;
975	else
976	rc = VERR_VD_NOT_OPENED;
977
978	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
979	return rc;
980	}
981
982	/** @copydoc VBOXHDDBACKEND::pfnSetModificationUuid */
983	static int rawSetModificationUuid(void *pBackendData, PCRTUUID pUuid)
984	{
985	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
986	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
987	int rc;
988
989	AssertPtr(pImage);
990
991	if (pImage)
992	{
993	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
994	rc = VERR_NOT_SUPPORTED;
995	else
996	rc = VERR_VD_IMAGE_READ_ONLY;
997	}
998	else
999	rc = VERR_VD_NOT_OPENED;
1000
1001	LogFlowFunc(("returns %Rrc\n", rc));
1002	return rc;
1003	}
1004
1005	/** @copydoc VBOXHDDBACKEND::pfnGetParentUuid */
1006	static int rawGetParentUuid(void *pBackendData, PRTUUID pUuid)
1007	{
1008	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
1009	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1010	int rc;
1011
1012	AssertPtr(pImage);
1013
1014	if (pImage)
1015	rc = VERR_NOT_SUPPORTED;
1016	else
1017	rc = VERR_VD_NOT_OPENED;
1018
1019	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
1020	return rc;
1021	}
1022
1023	/** @copydoc VBOXHDDBACKEND::pfnSetParentUuid */
1024	static int rawSetParentUuid(void *pBackendData, PCRTUUID pUuid)
1025	{
1026	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
1027	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1028	int rc;
1029
1030	AssertPtr(pImage);
1031
1032	if (pImage)
1033	{
1034	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
1035	rc = VERR_NOT_SUPPORTED;
1036	else
1037	rc = VERR_VD_IMAGE_READ_ONLY;
1038	}
1039	else
1040	rc = VERR_VD_NOT_OPENED;
1041
1042	LogFlowFunc(("returns %Rrc\n", rc));
1043	return rc;
1044	}
1045
1046	/** @copydoc VBOXHDDBACKEND::pfnGetParentModificationUuid */
1047	static int rawGetParentModificationUuid(void *pBackendData, PRTUUID pUuid)
1048	{
1049	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
1050	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1051	int rc;
1052
1053	AssertPtr(pImage);
1054
1055	if (pImage)
1056	rc = VERR_NOT_SUPPORTED;
1057	else
1058	rc = VERR_VD_NOT_OPENED;
1059
1060	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
1061	return rc;
1062	}
1063
1064	/** @copydoc VBOXHDDBACKEND::pfnSetParentModificationUuid */
1065	static int rawSetParentModificationUuid(void *pBackendData, PCRTUUID pUuid)
1066	{
1067	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
1068	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1069	int rc;
1070
1071	AssertPtr(pImage);
1072
1073	if (pImage)
1074	{
1075	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
1076	rc = VERR_NOT_SUPPORTED;
1077	else
1078	rc = VERR_VD_IMAGE_READ_ONLY;
1079	}
1080	else
1081	rc = VERR_VD_NOT_OPENED;
1082
1083	LogFlowFunc(("returns %Rrc\n", rc));
1084	return rc;
1085	}
1086
1087	/** @copydoc VBOXHDDBACKEND::pfnDump */
1088	static void rawDump(void *pBackendData)
1089	{
1090	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1091
1092	AssertPtr(pImage);
1093	if (pImage)
1094	{
1095	vdIfErrorMessage(pImage->pIfError, "Header: Geometry PCHS=%u/%u/%u LCHS=%u/%u/%u cbSector=%llu\n",
1096	pImage->PCHSGeometry.cCylinders, pImage->PCHSGeometry.cHeads, pImage->PCHSGeometry.cSectors,
1097	pImage->LCHSGeometry.cCylinders, pImage->LCHSGeometry.cHeads, pImage->LCHSGeometry.cSectors,
1098	pImage->cbSize / 512);
1099	}
1100	}
1101
1102
1103
1104	VBOXHDDBACKEND g_RawBackend =
1105	{
1106	/* pszBackendName */
1107	"RAW",
1108	/* cbSize */
1109	sizeof(VBOXHDDBACKEND),
1110	/* uBackendCaps */
1111	VD_CAP_CREATE_FIXED \| VD_CAP_FILE \| VD_CAP_ASYNC \| VD_CAP_VFS,
1112	/* paFileExtensions */
1113	s_aRawFileExtensions,
1114	/* paConfigInfo */
1115	NULL,
1116	/* hPlugin */
1117	NIL_RTLDRMOD,
1118	/* pfnCheckIfValid */
1119	rawCheckIfValid,
1120	/* pfnOpen */
1121	rawOpen,
1122	/* pfnCreate */
1123	rawCreate,
1124	/* pfnRename */
1125	rawRename,
1126	/* pfnClose */
1127	rawClose,
1128	/* pfnRead */
1129	rawRead,
1130	/* pfnWrite */
1131	rawWrite,
1132	/* pfnFlush */
1133	rawFlush,
1134	/* pfnDiscard */
1135	NULL,
1136	/* pfnGetVersion */
1137	rawGetVersion,
1138	/* pfnGetSize */
1139	rawGetSize,
1140	/* pfnGetFileSize */
1141	rawGetFileSize,
1142	/* pfnGetPCHSGeometry */
1143	rawGetPCHSGeometry,
1144	/* pfnSetPCHSGeometry */
1145	rawSetPCHSGeometry,
1146	/* pfnGetLCHSGeometry */
1147	rawGetLCHSGeometry,
1148	/* pfnSetLCHSGeometry */
1149	rawSetLCHSGeometry,
1150	/* pfnGetImageFlags */
1151	rawGetImageFlags,
1152	/* pfnGetOpenFlags */
1153	rawGetOpenFlags,
1154	/* pfnSetOpenFlags */
1155	rawSetOpenFlags,
1156	/* pfnGetComment */
1157	rawGetComment,
1158	/* pfnSetComment */
1159	rawSetComment,
1160	/* pfnGetUuid */
1161	rawGetUuid,
1162	/* pfnSetUuid */
1163	rawSetUuid,
1164	/* pfnGetModificationUuid */
1165	rawGetModificationUuid,
1166	/* pfnSetModificationUuid */
1167	rawSetModificationUuid,
1168	/* pfnGetParentUuid */
1169	rawGetParentUuid,
1170	/* pfnSetParentUuid */
1171	rawSetParentUuid,
1172	/* pfnGetParentModificationUuid */
1173	rawGetParentModificationUuid,
1174	/* pfnSetParentModificationUuid */
1175	rawSetParentModificationUuid,
1176	/* pfnDump */
1177	rawDump,
1178	/* pfnGetTimeStamp */
1179	NULL,
1180	/* pfnGetParentTimeStamp */
1181	NULL,
1182	/* pfnSetParentTimeStamp */
1183	NULL,
1184	/* pfnGetParentFilename */
1185	NULL,
1186	/* pfnSetParentFilename */
1187	NULL,
1188	/* pfnComposeLocation */
1189	genericFileComposeLocation,
1190	/* pfnComposeName */
1191	genericFileComposeName,
1192	/* pfnCompact */
1193	NULL,
1194	/* pfnResize */
1195	NULL,
1196	/* pfnRepair */
1197	NULL
1198	};

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source: vbox/trunk/src/VBox/Storage/RAW.cpp@ 44252

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