RAW.cpp@ 62793

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1	/* $Id: RAW.cpp 62747 2016-07-30 16:01:43Z vboxsync $ */
2	/** @file
3	* RawHDDCore - Raw Disk image, Core Code.
4	*/
5
6	/*
7	* Copyright (C) 2006-2016 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	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#define LOG_GROUP LOG_GROUP_VD_RAW
23	#include <VBox/vd-plugin.h>
24	#include <VBox/err.h>
25
26	#include <VBox/log.h>
27	#include <iprt/assert.h>
28	#include <iprt/alloc.h>
29	#include <iprt/path.h>
30
31	#include "VDBackends.h"
32
33
34	/*********************************************************************************************************************************
35	* Constants And Macros, Structures and Typedefs *
36	*********************************************************************************************************************************/
37
38	/**
39	* Raw image data structure.
40	*/
41	typedef struct RAWIMAGE
42	{
43	/** Image name. */
44	const char *pszFilename;
45	/** Storage handle. */
46	PVDIOSTORAGE pStorage;
47
48	/** Pointer to the per-disk VD interface list. */
49	PVDINTERFACE pVDIfsDisk;
50	/** Pointer to the per-image VD interface list. */
51	PVDINTERFACE pVDIfsImage;
52	/** Error interface. */
53	PVDINTERFACEERROR pIfError;
54	/** I/O interface. */
55	PVDINTERFACEIOINT pIfIo;
56
57	/** Open flags passed by VBoxHD layer. */
58	unsigned uOpenFlags;
59	/** Image flags defined during creation or determined during open. */
60	unsigned uImageFlags;
61	/** Total size of the image. */
62	uint64_t cbSize;
63	/** Position in the image (only truly used for sequential access). */
64	uint64_t offAccess;
65	/** Flag if this is a newly created image. */
66	bool fCreate;
67	/** Physical geometry of this image. */
68	VDGEOMETRY PCHSGeometry;
69	/** Logical geometry of this image. */
70	VDGEOMETRY LCHSGeometry;
71	/** Sector size of the image. */
72	uint32_t cbSector;
73	} RAWIMAGE, *PRAWIMAGE;
74
75
76	/** Size of write operations when filling an image with zeroes. */
77	#define RAW_FILL_SIZE (128 * _1K)
78
79	/** The maximum reasonable size of a floppy image (big format 2.88MB medium). */
80	#define RAW_MAX_FLOPPY_IMG_SIZE (512 * 82 * 48 * 2)
81
82
83	/*********************************************************************************************************************************
84	* Static Variables *
85	*********************************************************************************************************************************/
86
87	/** NULL-terminated array of supported file extensions. */
88	static const VDFILEEXTENSION s_aRawFileExtensions[] =
89	{
90	{"iso", VDTYPE_DVD},
91	{"cdr", VDTYPE_DVD},
92	{"img", VDTYPE_FLOPPY},
93	{"ima", VDTYPE_FLOPPY},
94	{"dsk", VDTYPE_FLOPPY},
95	{"flp", VDTYPE_FLOPPY},
96	{"vfd", VDTYPE_FLOPPY},
97	{NULL, VDTYPE_INVALID}
98	};
99
100
101	/*********************************************************************************************************************************
102	* Internal Functions *
103	*********************************************************************************************************************************/
104
105	/**
106	* Internal. Flush image data to disk.
107	*/
108	static int rawFlushImage(PRAWIMAGE pImage)
109	{
110	int rc = VINF_SUCCESS;
111
112	if ( pImage->pStorage
113	&& !(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
114	rc = vdIfIoIntFileFlushSync(pImage->pIfIo, pImage->pStorage);
115
116	return rc;
117	}
118
119	/**
120	* Internal. Free all allocated space for representing an image except pImage,
121	* and optionally delete the image from disk.
122	*/
123	static int rawFreeImage(PRAWIMAGE pImage, bool fDelete)
124	{
125	int rc = VINF_SUCCESS;
126
127	/* Freeing a never allocated image (e.g. because the open failed) is
128	* not signalled as an error. After all nothing bad happens. */
129	if (pImage)
130	{
131	if (pImage->pStorage)
132	{
133	/* No point updating the file that is deleted anyway. */
134	if (!fDelete)
135	{
136	/* For newly created images in sequential mode fill it to
137	* the nominal size. */
138	if ( pImage->uOpenFlags & VD_OPEN_FLAGS_SEQUENTIAL
139	&& !(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
140	&& pImage->fCreate)
141	{
142	/* Fill rest of image with zeroes, a must for sequential
143	* images to reach the nominal size. */
144	uint64_t uOff;
145	void *pvBuf = RTMemTmpAllocZ(RAW_FILL_SIZE);
146	if (!pvBuf)
147	goto out;
148
149	uOff = pImage->offAccess;
150	/* Write data to all image blocks. */
151	while (uOff < pImage->cbSize)
152	{
153	unsigned cbChunk = (unsigned)RT_MIN(pImage->cbSize - uOff,
154	RAW_FILL_SIZE);
155
156	rc = vdIfIoIntFileWriteSync(pImage->pIfIo, pImage->pStorage,
157	uOff, pvBuf, cbChunk);
158	if (RT_FAILURE(rc))
159	goto out;
160
161	uOff += cbChunk;
162	}
163	out:
164	if (pvBuf)
165	RTMemTmpFree(pvBuf);
166	}
167	rawFlushImage(pImage);
168	}
169
170	rc = vdIfIoIntFileClose(pImage->pIfIo, pImage->pStorage);
171	pImage->pStorage = NULL;
172	}
173
174	if (fDelete && pImage->pszFilename)
175	vdIfIoIntFileDelete(pImage->pIfIo, pImage->pszFilename);
176	}
177
178	LogFlowFunc(("returns %Rrc\n", rc));
179	return rc;
180	}
181
182	/**
183	* Internal: Open an image, constructing all necessary data structures.
184	*/
185	static int rawOpenImage(PRAWIMAGE pImage, unsigned uOpenFlags)
186	{
187	int rc;
188
189	pImage->uOpenFlags = uOpenFlags;
190	pImage->fCreate = false;
191
192	pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk);
193	pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage);
194	AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER);
195
196	/*
197	* Open the image.
198	*/
199	rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename,
200	VDOpenFlagsToFileOpenFlags(uOpenFlags,
201	false /* fCreate */),
202	&pImage->pStorage);
203	if (RT_FAILURE(rc))
204	{
205	/* Do NOT signal an appropriate error here, as the VD layer has the
206	* choice of retrying the open if it failed. */
207	goto out;
208	}
209
210	rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &pImage->cbSize);
211	if (RT_FAILURE(rc))
212	goto out;
213	if (pImage->cbSize % 512)
214	{
215	rc = VERR_VD_RAW_SIZE_MODULO_512;
216	goto out;
217	}
218	pImage->uImageFlags \|= VD_IMAGE_FLAGS_FIXED;
219
220	out:
221	if (RT_FAILURE(rc))
222	rawFreeImage(pImage, false);
223	return rc;
224	}
225
226	/**
227	* Internal: Create a raw image.
228	*/
229	static int rawCreateImage(PRAWIMAGE pImage, uint64_t cbSize,
230	unsigned uImageFlags, const char *pszComment,
231	PCVDGEOMETRY pPCHSGeometry,
232	PCVDGEOMETRY pLCHSGeometry, unsigned uOpenFlags,
233	PFNVDPROGRESS pfnProgress, void *pvUser,
234	unsigned uPercentStart, unsigned uPercentSpan)
235	{
236	RT_NOREF1(pszComment);
237	int rc;
238	RTFOFF cbFree = 0;
239	int32_t fOpen;
240
241	uImageFlags \|= VD_IMAGE_FLAGS_FIXED;
242
243	pImage->uOpenFlags = uOpenFlags & ~VD_OPEN_FLAGS_READONLY;
244
245	pImage->uImageFlags = uImageFlags;
246	pImage->fCreate = true;
247	pImage->PCHSGeometry = *pPCHSGeometry;
248	pImage->LCHSGeometry = *pLCHSGeometry;
249
250	pImage->pIfError = VDIfErrorGet(pImage->pVDIfsDisk);
251	pImage->pIfIo = VDIfIoIntGet(pImage->pVDIfsImage);
252	AssertPtrReturn(pImage->pIfIo, VERR_INVALID_PARAMETER);
253
254	if (uImageFlags & VD_IMAGE_FLAGS_DIFF)
255	{
256	rc = vdIfError(pImage->pIfError, VERR_VD_RAW_INVALID_TYPE, RT_SRC_POS, N_("Raw: cannot create diff image '%s'"), pImage->pszFilename);
257	goto out;
258	}
259
260	/* Create image file. */
261	fOpen = VDOpenFlagsToFileOpenFlags(pImage->uOpenFlags, true /* fCreate */);
262	if (uOpenFlags & VD_OPEN_FLAGS_SEQUENTIAL)
263	fOpen &= ~RTFILE_O_READ;
264	rc = vdIfIoIntFileOpen(pImage->pIfIo, pImage->pszFilename, fOpen, &pImage->pStorage);
265	if (RT_FAILURE(rc))
266	{
267	rc = vdIfError(pImage->pIfError, rc, RT_SRC_POS, N_("Raw: cannot create image '%s'"), pImage->pszFilename);
268	goto out;
269	}
270
271	if (!(uOpenFlags & VD_OPEN_FLAGS_SEQUENTIAL))
272	{
273	/* Check the free space on the disk and leave early if there is not
274	* sufficient space available. */
275	rc = vdIfIoIntFileGetFreeSpace(pImage->pIfIo, pImage->pszFilename, &cbFree);
276	if (RT_SUCCESS(rc) /* ignore errors */ && ((uint64_t)cbFree < cbSize))
277	{
278	rc = vdIfError(pImage->pIfError, VERR_DISK_FULL, RT_SRC_POS, N_("Raw: disk would overflow creating image '%s'"), pImage->pszFilename);
279	goto out;
280	}
281
282	/* Allocate & commit whole file if fixed image, it must be more
283	* effective than expanding file by write operations. */
284	rc = vdIfIoIntFileSetAllocationSize(pImage->pIfIo, pImage->pStorage, cbSize,
285	0 /* fFlags */, pfnProgress, pvUser, uPercentStart, uPercentSpan);
286	}
287
288	if (RT_SUCCESS(rc) && pfnProgress)
289	pfnProgress(pvUser, uPercentStart + uPercentSpan * 98 / 100);
290
291	pImage->cbSize = cbSize;
292
293	rc = rawFlushImage(pImage);
294
295	out:
296
297	if (RT_SUCCESS(rc) && pfnProgress)
298	pfnProgress(pvUser, uPercentStart + uPercentSpan);
299
300	if (RT_FAILURE(rc))
301	rawFreeImage(pImage, rc != VERR_ALREADY_EXISTS);
302	return rc;
303	}
304
305
306	/** @copydoc VBOXHDDBACKEND::pfnCheckIfValid */
307	static DECLCALLBACK(int) rawCheckIfValid(const char *pszFilename, PVDINTERFACE pVDIfsDisk,
308	PVDINTERFACE pVDIfsImage, VDTYPE *penmType)
309	{
310	RT_NOREF1(pVDIfsDisk);
311	LogFlowFunc(("pszFilename=\"%s\" pVDIfsDisk=%#p pVDIfsImage=%#p\n", pszFilename, pVDIfsDisk, pVDIfsImage));
312	PVDIOSTORAGE pStorage = NULL;
313	uint64_t cbFile;
314	int rc = VINF_SUCCESS;
315	char *pszSuffix = NULL;
316
317	PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage);
318	AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER);
319
320	if ( !VALID_PTR(pszFilename)
321	\|\| !*pszFilename)
322	{
323	rc = VERR_INVALID_PARAMETER;
324	goto out;
325	}
326
327	pszSuffix = RTPathSuffix(pszFilename);
328
329	/*
330	* Open the file and read the footer.
331	*/
332	rc = vdIfIoIntFileOpen(pIfIo, pszFilename,
333	VDOpenFlagsToFileOpenFlags(VD_OPEN_FLAGS_READONLY,
334	false /* fCreate */),
335	&pStorage);
336	if (RT_SUCCESS(rc))
337	{
338	rc = vdIfIoIntFileGetSize(pIfIo, pStorage, &cbFile);
339
340	/* Try to guess the image type based on the extension. */
341	if ( RT_SUCCESS(rc)
342	&& pszSuffix)
343	{
344	if ( !RTStrICmp(pszSuffix, ".iso")
345	\|\| !RTStrICmp(pszSuffix, ".cdr")) /* DVD images. */
346	{
347	/* Note that there are ISO images smaller than 1 MB; it is impossible to distinguish
348	* between raw floppy and CD images based on their size (and cannot be reliably done
349	* based on contents, either).
350	*/
351	if (cbFile % 2048)
352	rc = VERR_VD_RAW_SIZE_MODULO_2048;
353	else if (cbFile <= 32768)
354	rc = VERR_VD_RAW_SIZE_OPTICAL_TOO_SMALL;
355	else
356	{
357	*penmType = VDTYPE_DVD;
358	rc = VINF_SUCCESS;
359	}
360	}
361	else if ( !RTStrICmp(pszSuffix, ".img")
362	\|\| !RTStrICmp(pszSuffix, ".ima")
363	\|\| !RTStrICmp(pszSuffix, ".dsk")
364	\|\| !RTStrICmp(pszSuffix, ".flp")
365	\|\| !RTStrICmp(pszSuffix, ".vfd")) /* Floppy images */
366	{
367	if (cbFile % 512)
368	rc = VERR_VD_RAW_SIZE_MODULO_512;
369	else if (cbFile > RAW_MAX_FLOPPY_IMG_SIZE)
370	rc = VERR_VD_RAW_SIZE_FLOPPY_TOO_BIG;
371	else
372	{
373	*penmType = VDTYPE_FLOPPY;
374	rc = VINF_SUCCESS;
375	}
376	}
377	else
378	rc = VERR_VD_RAW_INVALID_HEADER;
379	}
380	else
381	rc = VERR_VD_RAW_INVALID_HEADER;
382	}
383
384	if (pStorage)
385	vdIfIoIntFileClose(pIfIo, pStorage);
386
387	out:
388	LogFlowFunc(("returns %Rrc\n", rc));
389	return rc;
390	}
391
392	/** @copydoc VBOXHDDBACKEND::pfnOpen */
393	static DECLCALLBACK(int) rawOpen(const char *pszFilename, unsigned uOpenFlags,
394	PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
395	VDTYPE enmType, void **ppBackendData)
396	{
397	LogFlowFunc(("pszFilename=\"%s\" uOpenFlags=%#x pVDIfsDisk=%#p pVDIfsImage=%#p enmType=%u ppBackendData=%#p\n", pszFilename, uOpenFlags, pVDIfsDisk, pVDIfsImage, enmType, ppBackendData));
398	int rc;
399	PRAWIMAGE pImage;
400
401	NOREF(enmType); /*< @todo r=klaus make use of the type info. /
402
403	/* Check open flags. All valid flags are supported. */
404	if (uOpenFlags & ~VD_OPEN_FLAGS_MASK)
405	{
406	rc = VERR_INVALID_PARAMETER;
407	goto out;
408	}
409
410	/* Check remaining arguments. */
411	if ( !VALID_PTR(pszFilename)
412	\|\| !*pszFilename)
413	{
414	rc = VERR_INVALID_PARAMETER;
415	goto out;
416	}
417
418
419	pImage = (PRAWIMAGE)RTMemAllocZ(sizeof(RAWIMAGE));
420	if (!pImage)
421	{
422	rc = VERR_NO_MEMORY;
423	goto out;
424	}
425	pImage->pszFilename = pszFilename;
426	pImage->pStorage = NULL;
427	pImage->pVDIfsDisk = pVDIfsDisk;
428	pImage->pVDIfsImage = pVDIfsImage;
429
430	rc = rawOpenImage(pImage, uOpenFlags);
431	if (RT_SUCCESS(rc))
432	{
433	if (enmType == VDTYPE_DVD)
434	pImage->cbSector = 2048;
435	else
436	pImage->cbSector = 512;
437	*ppBackendData = pImage;
438	}
439	else
440	RTMemFree(pImage);
441
442	out:
443	LogFlowFunc(("returns %Rrc (pBackendData=%#p)\n", rc, *ppBackendData));
444	return rc;
445	}
446
447	/** @copydoc VBOXHDDBACKEND::pfnCreate */
448	static DECLCALLBACK(int) rawCreate(const char *pszFilename, uint64_t cbSize,
449	unsigned uImageFlags, const char *pszComment,
450	PCVDGEOMETRY pPCHSGeometry, PCVDGEOMETRY pLCHSGeometry,
451	PCRTUUID pUuid, unsigned uOpenFlags,
452	unsigned uPercentStart, unsigned uPercentSpan,
453	PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
454	PVDINTERFACE pVDIfsOperation, VDTYPE enmType,
455	void **ppBackendData)
456	{
457	RT_NOREF1(pUuid);
458	LogFlowFunc(("pszFilename=\"%s\" cbSize=%llu uImageFlags=%#x pszComment=\"%s\" pPCHSGeometry=%#p pLCHSGeometry=%#p Uuid=%RTuuid uOpenFlags=%#x uPercentStart=%u uPercentSpan=%u pVDIfsDisk=%#p pVDIfsImage=%#p pVDIfsOperation=%#p enmType=%u ppBackendData=%#p",
459	pszFilename, cbSize, uImageFlags, pszComment, pPCHSGeometry, pLCHSGeometry, pUuid, uOpenFlags, uPercentStart, uPercentSpan, pVDIfsDisk, pVDIfsImage, pVDIfsOperation, enmType, ppBackendData));
460	int rc;
461	PRAWIMAGE pImage;
462
463	PFNVDPROGRESS pfnProgress = NULL;
464	void *pvUser = NULL;
465	PVDINTERFACEPROGRESS pIfProgress = VDIfProgressGet(pVDIfsOperation);
466	if (pIfProgress)
467	{
468	pfnProgress = pIfProgress->pfnProgress;
469	pvUser = pIfProgress->Core.pvUser;
470	}
471
472	/* Check the VD container type. Yes, hard disk must be allowed, otherwise
473	* various tools using this backend for hard disk images will fail. */
474	if (enmType != VDTYPE_HDD && enmType != VDTYPE_DVD && enmType != VDTYPE_FLOPPY)
475	{
476	rc = VERR_VD_INVALID_TYPE;
477	goto out;
478	}
479
480	/* Check open flags. All valid flags are supported. */
481	if (uOpenFlags & ~VD_OPEN_FLAGS_MASK)
482	{
483	rc = VERR_INVALID_PARAMETER;
484	goto out;
485	}
486
487	/* Check remaining arguments. */
488	if ( !VALID_PTR(pszFilename)
489	\|\| !*pszFilename
490	\|\| !VALID_PTR(pPCHSGeometry)
491	\|\| !VALID_PTR(pLCHSGeometry))
492	{
493	rc = VERR_INVALID_PARAMETER;
494	goto out;
495	}
496
497	pImage = (PRAWIMAGE)RTMemAllocZ(sizeof(RAWIMAGE));
498	if (!pImage)
499	{
500	rc = VERR_NO_MEMORY;
501	goto out;
502	}
503	pImage->pszFilename = pszFilename;
504	pImage->pStorage = NULL;
505	pImage->pVDIfsDisk = pVDIfsDisk;
506	pImage->pVDIfsImage = pVDIfsImage;
507
508	rc = rawCreateImage(pImage, cbSize, uImageFlags, pszComment,
509	pPCHSGeometry, pLCHSGeometry, uOpenFlags,
510	pfnProgress, pvUser, uPercentStart, uPercentSpan);
511	if (RT_SUCCESS(rc))
512	{
513	/* So far the image is opened in read/write mode. Make sure the
514	* image is opened in read-only mode if the caller requested that. */
515	if (uOpenFlags & VD_OPEN_FLAGS_READONLY)
516	{
517	rawFreeImage(pImage, false);
518	rc = rawOpenImage(pImage, uOpenFlags);
519	if (RT_FAILURE(rc))
520	{
521	RTMemFree(pImage);
522	goto out;
523	}
524	}
525	*ppBackendData = pImage;
526	}
527	else
528	RTMemFree(pImage);
529
530	out:
531	LogFlowFunc(("returns %Rrc (pBackendData=%#p)\n", rc, *ppBackendData));
532	return rc;
533	}
534
535	/** @copydoc VBOXHDDBACKEND::pfnRename */
536	static DECLCALLBACK(int) rawRename(void pBackendData, const char pszFilename)
537	{
538	LogFlowFunc(("pBackendData=%#p pszFilename=%#p\n", pBackendData, pszFilename));
539	int rc = VINF_SUCCESS;
540	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
541
542	/* Check arguments. */
543	if ( !pImage
544	\|\| !pszFilename
545	\|\| !*pszFilename)
546	{
547	rc = VERR_INVALID_PARAMETER;
548	goto out;
549	}
550
551	/* Close the image. */
552	rc = rawFreeImage(pImage, false);
553	if (RT_FAILURE(rc))
554	goto out;
555
556	/* Rename the file. */
557	rc = vdIfIoIntFileMove(pImage->pIfIo, pImage->pszFilename, pszFilename, 0);
558	if (RT_FAILURE(rc))
559	{
560	/* The move failed, try to reopen the original image. */
561	int rc2 = rawOpenImage(pImage, pImage->uOpenFlags);
562	if (RT_FAILURE(rc2))
563	rc = rc2;
564
565	goto out;
566	}
567
568	/* Update pImage with the new information. */
569	pImage->pszFilename = pszFilename;
570
571	/* Open the old image with new name. */
572	rc = rawOpenImage(pImage, pImage->uOpenFlags);
573	if (RT_FAILURE(rc))
574	goto out;
575
576	out:
577	LogFlowFunc(("returns %Rrc\n", rc));
578	return rc;
579	}
580
581	/** @copydoc VBOXHDDBACKEND::pfnClose */
582	static DECLCALLBACK(int) rawClose(void *pBackendData, bool fDelete)
583	{
584	LogFlowFunc(("pBackendData=%#p fDelete=%d\n", pBackendData, fDelete));
585	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
586	int rc;
587
588	rc = rawFreeImage(pImage, fDelete);
589	RTMemFree(pImage);
590
591	LogFlowFunc(("returns %Rrc\n", rc));
592	return rc;
593	}
594
595	/** @copydoc VBOXHDDBACKEND::pfnRead */
596	static DECLCALLBACK(int) rawRead(void *pBackendData, uint64_t uOffset, size_t cbRead,
597	PVDIOCTX pIoCtx, size_t *pcbActuallyRead)
598	{
599	int rc = VINF_SUCCESS;
600	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
601
602	/* For sequential access do not allow to go back. */
603	if ( pImage->uOpenFlags & VD_OPEN_FLAGS_SEQUENTIAL
604	&& uOffset < pImage->offAccess)
605	{
606	*pcbActuallyRead = 0;
607	return VERR_INVALID_PARAMETER;
608	}
609
610	rc = vdIfIoIntFileReadUser(pImage->pIfIo, pImage->pStorage, uOffset,
611	pIoCtx, cbRead);
612	if (RT_SUCCESS(rc))
613	{
614	*pcbActuallyRead = cbRead;
615	pImage->offAccess = uOffset + cbRead;
616	}
617
618	return rc;
619	}
620
621	/** @copydoc VBOXHDDBACKEND::pfnWrite */
622	static DECLCALLBACK(int) rawWrite(void *pBackendData, uint64_t uOffset, size_t cbWrite,
623	PVDIOCTX pIoCtx, size_t pcbWriteProcess, size_t pcbPreRead,
624	size_t *pcbPostRead, unsigned fWrite)
625	{
626	RT_NOREF1(fWrite);
627	int rc = VINF_SUCCESS;
628	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
629
630	/* For sequential access do not allow to go back. */
631	if ( pImage->uOpenFlags & VD_OPEN_FLAGS_SEQUENTIAL
632	&& uOffset < pImage->offAccess)
633	{
634	*pcbWriteProcess = 0;
635	*pcbPostRead = 0;
636	*pcbPreRead = 0;
637	return VERR_INVALID_PARAMETER;
638	}
639
640	rc = vdIfIoIntFileWriteUser(pImage->pIfIo, pImage->pStorage, uOffset,
641	pIoCtx, cbWrite, NULL, NULL);
642	if (RT_SUCCESS(rc))
643	{
644	*pcbWriteProcess = cbWrite;
645	*pcbPostRead = 0;
646	*pcbPreRead = 0;
647	pImage->offAccess = uOffset + cbWrite;
648	}
649
650	return rc;
651	}
652
653	/** @copydoc VBOXHDDBACKEND::pfnFlush */
654	static DECLCALLBACK(int) rawFlush(void *pBackendData, PVDIOCTX pIoCtx)
655	{
656	int rc = VINF_SUCCESS;
657	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
658
659	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
660	rc = vdIfIoIntFileFlush(pImage->pIfIo, pImage->pStorage, pIoCtx,
661	NULL, NULL);
662
663	return rc;
664	}
665
666	/** @copydoc VBOXHDDBACKEND::pfnGetVersion */
667	static DECLCALLBACK(unsigned) rawGetVersion(void *pBackendData)
668	{
669	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
670	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
671
672	AssertPtr(pImage);
673
674	if (pImage)
675	return 1;
676	else
677	return 0;
678	}
679
680	/** @copydoc VBOXHDDBACKEND::pfnGetSize */
681	static DECLCALLBACK(uint32_t) rawGetSectorSize(void *pBackendData)
682	{
683	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
684	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
685	uint32_t cb = 0;
686
687	AssertPtr(pImage);
688
689	if (pImage && pImage->pStorage)
690	cb = pImage->cbSector;
691
692	LogFlowFunc(("returns %u\n", cb));
693	return cb;
694	}
695
696	/** @copydoc VBOXHDDBACKEND::pfnGetSize */
697	static DECLCALLBACK(uint64_t) rawGetSize(void *pBackendData)
698	{
699	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
700	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
701	uint64_t cb = 0;
702
703	AssertPtr(pImage);
704
705	if (pImage && pImage->pStorage)
706	cb = pImage->cbSize;
707
708	LogFlowFunc(("returns %llu\n", cb));
709	return cb;
710	}
711
712	/** @copydoc VBOXHDDBACKEND::pfnGetFileSize */
713	static DECLCALLBACK(uint64_t) rawGetFileSize(void *pBackendData)
714	{
715	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
716	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
717	uint64_t cb = 0;
718
719	AssertPtr(pImage);
720
721	if (pImage)
722	{
723	uint64_t cbFile;
724	if (pImage->pStorage)
725	{
726	int rc = vdIfIoIntFileGetSize(pImage->pIfIo, pImage->pStorage, &cbFile);
727	if (RT_SUCCESS(rc))
728	cb += cbFile;
729	}
730	}
731
732	LogFlowFunc(("returns %lld\n", cb));
733	return cb;
734	}
735
736	/** @copydoc VBOXHDDBACKEND::pfnGetPCHSGeometry */
737	static DECLCALLBACK(int) rawGetPCHSGeometry(void *pBackendData,
738	PVDGEOMETRY pPCHSGeometry)
739	{
740	LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p\n", pBackendData, pPCHSGeometry));
741	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
742	int rc;
743
744	AssertPtr(pImage);
745
746	if (pImage)
747	{
748	if (pImage->PCHSGeometry.cCylinders)
749	{
750	*pPCHSGeometry = pImage->PCHSGeometry;
751	rc = VINF_SUCCESS;
752	}
753	else
754	rc = VERR_VD_GEOMETRY_NOT_SET;
755	}
756	else
757	rc = VERR_VD_NOT_OPENED;
758
759	LogFlowFunc(("returns %Rrc (PCHS=%u/%u/%u)\n", rc, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
760	return rc;
761	}
762
763	/** @copydoc VBOXHDDBACKEND::pfnSetPCHSGeometry */
764	static DECLCALLBACK(int) rawSetPCHSGeometry(void *pBackendData,
765	PCVDGEOMETRY pPCHSGeometry)
766	{
767	LogFlowFunc(("pBackendData=%#p pPCHSGeometry=%#p PCHS=%u/%u/%u\n", pBackendData, pPCHSGeometry, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
768	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
769	int rc;
770
771	AssertPtr(pImage);
772
773	if (pImage)
774	{
775	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
776	{
777	rc = VERR_VD_IMAGE_READ_ONLY;
778	goto out;
779	}
780
781	pImage->PCHSGeometry = *pPCHSGeometry;
782	rc = VINF_SUCCESS;
783	}
784	else
785	rc = VERR_VD_NOT_OPENED;
786
787	out:
788	LogFlowFunc(("returns %Rrc\n", rc));
789	return rc;
790	}
791
792	/** @copydoc VBOXHDDBACKEND::pfnGetLCHSGeometry */
793	static DECLCALLBACK(int) rawGetLCHSGeometry(void *pBackendData,
794	PVDGEOMETRY pLCHSGeometry)
795	{
796	LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p\n", pBackendData, pLCHSGeometry));
797	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
798	int rc;
799
800	AssertPtr(pImage);
801
802	if (pImage)
803	{
804	if (pImage->LCHSGeometry.cCylinders)
805	{
806	*pLCHSGeometry = pImage->LCHSGeometry;
807	rc = VINF_SUCCESS;
808	}
809	else
810	rc = VERR_VD_GEOMETRY_NOT_SET;
811	}
812	else
813	rc = VERR_VD_NOT_OPENED;
814
815	LogFlowFunc(("returns %Rrc (LCHS=%u/%u/%u)\n", rc, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
816	return rc;
817	}
818
819	/** @copydoc VBOXHDDBACKEND::pfnSetLCHSGeometry */
820	static DECLCALLBACK(int) rawSetLCHSGeometry(void *pBackendData,
821	PCVDGEOMETRY pLCHSGeometry)
822	{
823	LogFlowFunc(("pBackendData=%#p pLCHSGeometry=%#p LCHS=%u/%u/%u\n", pBackendData, pLCHSGeometry, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
824	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
825	int rc;
826
827	AssertPtr(pImage);
828
829	if (pImage)
830	{
831	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
832	{
833	rc = VERR_VD_IMAGE_READ_ONLY;
834	goto out;
835	}
836
837	pImage->LCHSGeometry = *pLCHSGeometry;
838	rc = VINF_SUCCESS;
839	}
840	else
841	rc = VERR_VD_NOT_OPENED;
842
843	out:
844	LogFlowFunc(("returns %Rrc\n", rc));
845	return rc;
846	}
847
848	/** @copydoc VBOXHDDBACKEND::pfnGetImageFlags */
849	static DECLCALLBACK(unsigned) rawGetImageFlags(void *pBackendData)
850	{
851	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
852	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
853	unsigned uImageFlags;
854
855	AssertPtr(pImage);
856
857	if (pImage)
858	uImageFlags = pImage->uImageFlags;
859	else
860	uImageFlags = 0;
861
862	LogFlowFunc(("returns %#x\n", uImageFlags));
863	return uImageFlags;
864	}
865
866	/** @copydoc VBOXHDDBACKEND::pfnGetOpenFlags */
867	static DECLCALLBACK(unsigned) rawGetOpenFlags(void *pBackendData)
868	{
869	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
870	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
871	unsigned uOpenFlags;
872
873	AssertPtr(pImage);
874
875	if (pImage)
876	uOpenFlags = pImage->uOpenFlags;
877	else
878	uOpenFlags = 0;
879
880	LogFlowFunc(("returns %#x\n", uOpenFlags));
881	return uOpenFlags;
882	}
883
884	/** @copydoc VBOXHDDBACKEND::pfnSetOpenFlags */
885	static DECLCALLBACK(int) rawSetOpenFlags(void *pBackendData, unsigned uOpenFlags)
886	{
887	LogFlowFunc(("pBackendData=%#p\n uOpenFlags=%#x", pBackendData, uOpenFlags));
888	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
889	int rc;
890
891	/* Image must be opened and the new flags must be valid. */
892	if (!pImage \|\| (uOpenFlags & ~( VD_OPEN_FLAGS_READONLY \| VD_OPEN_FLAGS_INFO
893	\| VD_OPEN_FLAGS_ASYNC_IO \| VD_OPEN_FLAGS_SHAREABLE
894	\| VD_OPEN_FLAGS_SEQUENTIAL \| VD_OPEN_FLAGS_SKIP_CONSISTENCY_CHECKS)))
895	{
896	rc = VERR_INVALID_PARAMETER;
897	goto out;
898	}
899
900	/* Implement this operation via reopening the image. */
901	rc = rawFreeImage(pImage, false);
902	if (RT_FAILURE(rc))
903	goto out;
904	rc = rawOpenImage(pImage, uOpenFlags);
905
906	out:
907	LogFlowFunc(("returns %Rrc\n", rc));
908	return rc;
909	}
910
911	/** @copydoc VBOXHDDBACKEND::pfnGetComment */
912	static DECLCALLBACK(int) rawGetComment(void pBackendData, char pszComment,
913	size_t cbComment)
914	{
915	RT_NOREF2(pszComment, cbComment);
916	LogFlowFunc(("pBackendData=%#p pszComment=%#p cbComment=%zu\n", pBackendData, pszComment, cbComment));
917	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
918	int rc;
919
920	AssertPtr(pImage);
921
922	if (pImage)
923	rc = VERR_NOT_SUPPORTED;
924	else
925	rc = VERR_VD_NOT_OPENED;
926
927	LogFlowFunc(("returns %Rrc comment='%s'\n", rc, pszComment));
928	return rc;
929	}
930
931	/** @copydoc VBOXHDDBACKEND::pfnSetComment */
932	static DECLCALLBACK(int) rawSetComment(void pBackendData, const char pszComment)
933	{
934	RT_NOREF1(pszComment);
935	LogFlowFunc(("pBackendData=%#p pszComment=\"%s\"\n", pBackendData, pszComment));
936	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
937	int rc;
938
939	AssertPtr(pImage);
940
941	if (pImage)
942	{
943	if (pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY)
944	rc = VERR_VD_IMAGE_READ_ONLY;
945	else
946	rc = VERR_NOT_SUPPORTED;
947	}
948	else
949	rc = VERR_VD_NOT_OPENED;
950
951	LogFlowFunc(("returns %Rrc\n", rc));
952	return rc;
953	}
954
955	/** @copydoc VBOXHDDBACKEND::pfnGetUuid */
956	static DECLCALLBACK(int) rawGetUuid(void *pBackendData, PRTUUID pUuid)
957	{
958	RT_NOREF1(pUuid);
959	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
960	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
961	int rc;
962
963	AssertPtr(pImage);
964
965	if (pImage)
966	rc = VERR_NOT_SUPPORTED;
967	else
968	rc = VERR_VD_NOT_OPENED;
969
970	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
971	return rc;
972	}
973
974	/** @copydoc VBOXHDDBACKEND::pfnSetUuid */
975	static DECLCALLBACK(int) rawSetUuid(void *pBackendData, PCRTUUID pUuid)
976	{
977	RT_NOREF1(pUuid);
978	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
979	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
980	int rc;
981
982	LogFlowFunc(("%RTuuid\n", pUuid));
983	AssertPtr(pImage);
984
985	if (pImage)
986	{
987	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
988	rc = VERR_NOT_SUPPORTED;
989	else
990	rc = VERR_VD_IMAGE_READ_ONLY;
991	}
992	else
993	rc = VERR_VD_NOT_OPENED;
994
995	LogFlowFunc(("returns %Rrc\n", rc));
996	return rc;
997	}
998
999	/** @copydoc VBOXHDDBACKEND::pfnGetModificationUuid */
1000	static DECLCALLBACK(int) rawGetModificationUuid(void *pBackendData, PRTUUID pUuid)
1001	{
1002	RT_NOREF1(pUuid);
1003	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
1004	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1005	int rc;
1006
1007	AssertPtr(pImage);
1008
1009	if (pImage)
1010	rc = VERR_NOT_SUPPORTED;
1011	else
1012	rc = VERR_VD_NOT_OPENED;
1013
1014	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
1015	return rc;
1016	}
1017
1018	/** @copydoc VBOXHDDBACKEND::pfnSetModificationUuid */
1019	static DECLCALLBACK(int) rawSetModificationUuid(void *pBackendData, PCRTUUID pUuid)
1020	{
1021	RT_NOREF1(pUuid);
1022	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
1023	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1024	int rc;
1025
1026	AssertPtr(pImage);
1027
1028	if (pImage)
1029	{
1030	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
1031	rc = VERR_NOT_SUPPORTED;
1032	else
1033	rc = VERR_VD_IMAGE_READ_ONLY;
1034	}
1035	else
1036	rc = VERR_VD_NOT_OPENED;
1037
1038	LogFlowFunc(("returns %Rrc\n", rc));
1039	return rc;
1040	}
1041
1042	/** @copydoc VBOXHDDBACKEND::pfnGetParentUuid */
1043	static DECLCALLBACK(int) rawGetParentUuid(void *pBackendData, PRTUUID pUuid)
1044	{
1045	RT_NOREF1(pUuid);
1046	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
1047	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1048	int rc;
1049
1050	AssertPtr(pImage);
1051
1052	if (pImage)
1053	rc = VERR_NOT_SUPPORTED;
1054	else
1055	rc = VERR_VD_NOT_OPENED;
1056
1057	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
1058	return rc;
1059	}
1060
1061	/** @copydoc VBOXHDDBACKEND::pfnSetParentUuid */
1062	static DECLCALLBACK(int) rawSetParentUuid(void *pBackendData, PCRTUUID pUuid)
1063	{
1064	RT_NOREF1(pUuid);
1065	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
1066	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1067	int rc;
1068
1069	AssertPtr(pImage);
1070
1071	if (pImage)
1072	{
1073	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
1074	rc = VERR_NOT_SUPPORTED;
1075	else
1076	rc = VERR_VD_IMAGE_READ_ONLY;
1077	}
1078	else
1079	rc = VERR_VD_NOT_OPENED;
1080
1081	LogFlowFunc(("returns %Rrc\n", rc));
1082	return rc;
1083	}
1084
1085	/** @copydoc VBOXHDDBACKEND::pfnGetParentModificationUuid */
1086	static DECLCALLBACK(int) rawGetParentModificationUuid(void *pBackendData, PRTUUID pUuid)
1087	{
1088	RT_NOREF1(pUuid);
1089	LogFlowFunc(("pBackendData=%#p pUuid=%#p\n", pBackendData, pUuid));
1090	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1091	int rc;
1092
1093	AssertPtr(pImage);
1094
1095	if (pImage)
1096	rc = VERR_NOT_SUPPORTED;
1097	else
1098	rc = VERR_VD_NOT_OPENED;
1099
1100	LogFlowFunc(("returns %Rrc (%RTuuid)\n", rc, pUuid));
1101	return rc;
1102	}
1103
1104	/** @copydoc VBOXHDDBACKEND::pfnSetParentModificationUuid */
1105	static DECLCALLBACK(int) rawSetParentModificationUuid(void *pBackendData, PCRTUUID pUuid)
1106	{
1107	RT_NOREF1(pUuid);
1108	LogFlowFunc(("pBackendData=%#p Uuid=%RTuuid\n", pBackendData, pUuid));
1109	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1110	int rc;
1111
1112	AssertPtr(pImage);
1113
1114	if (pImage)
1115	{
1116	if (!(pImage->uOpenFlags & VD_OPEN_FLAGS_READONLY))
1117	rc = VERR_NOT_SUPPORTED;
1118	else
1119	rc = VERR_VD_IMAGE_READ_ONLY;
1120	}
1121	else
1122	rc = VERR_VD_NOT_OPENED;
1123
1124	LogFlowFunc(("returns %Rrc\n", rc));
1125	return rc;
1126	}
1127
1128	/** @copydoc VBOXHDDBACKEND::pfnDump */
1129	static DECLCALLBACK(void) rawDump(void *pBackendData)
1130	{
1131	PRAWIMAGE pImage = (PRAWIMAGE)pBackendData;
1132
1133	AssertPtr(pImage);
1134	if (pImage)
1135	{
1136	vdIfErrorMessage(pImage->pIfError, "Header: Geometry PCHS=%u/%u/%u LCHS=%u/%u/%u cbSector=%llu\n",
1137	pImage->PCHSGeometry.cCylinders, pImage->PCHSGeometry.cHeads, pImage->PCHSGeometry.cSectors,
1138	pImage->LCHSGeometry.cCylinders, pImage->LCHSGeometry.cHeads, pImage->LCHSGeometry.cSectors,
1139	pImage->cbSize / 512);
1140	}
1141	}
1142
1143
1144
1145	const VBOXHDDBACKEND g_RawBackend =
1146	{
1147	/* pszBackendName */
1148	"RAW",
1149	/* cbSize */
1150	sizeof(VBOXHDDBACKEND),
1151	/* uBackendCaps */
1152	VD_CAP_CREATE_FIXED \| VD_CAP_FILE \| VD_CAP_ASYNC \| VD_CAP_VFS,
1153	/* paFileExtensions */
1154	s_aRawFileExtensions,
1155	/* paConfigInfo */
1156	NULL,
1157	/* pfnCheckIfValid */
1158	rawCheckIfValid,
1159	/* pfnOpen */
1160	rawOpen,
1161	/* pfnCreate */
1162	rawCreate,
1163	/* pfnRename */
1164	rawRename,
1165	/* pfnClose */
1166	rawClose,
1167	/* pfnRead */
1168	rawRead,
1169	/* pfnWrite */
1170	rawWrite,
1171	/* pfnFlush */
1172	rawFlush,
1173	/* pfnDiscard */
1174	NULL,
1175	/* pfnGetVersion */
1176	rawGetVersion,
1177	/* pfnGetSectorSize */
1178	rawGetSectorSize,
1179	/* pfnGetSize */
1180	rawGetSize,
1181	/* pfnGetFileSize */
1182	rawGetFileSize,
1183	/* pfnGetPCHSGeometry */
1184	rawGetPCHSGeometry,
1185	/* pfnSetPCHSGeometry */
1186	rawSetPCHSGeometry,
1187	/* pfnGetLCHSGeometry */
1188	rawGetLCHSGeometry,
1189	/* pfnSetLCHSGeometry */
1190	rawSetLCHSGeometry,
1191	/* pfnGetImageFlags */
1192	rawGetImageFlags,
1193	/* pfnGetOpenFlags */
1194	rawGetOpenFlags,
1195	/* pfnSetOpenFlags */
1196	rawSetOpenFlags,
1197	/* pfnGetComment */
1198	rawGetComment,
1199	/* pfnSetComment */
1200	rawSetComment,
1201	/* pfnGetUuid */
1202	rawGetUuid,
1203	/* pfnSetUuid */
1204	rawSetUuid,
1205	/* pfnGetModificationUuid */
1206	rawGetModificationUuid,
1207	/* pfnSetModificationUuid */
1208	rawSetModificationUuid,
1209	/* pfnGetParentUuid */
1210	rawGetParentUuid,
1211	/* pfnSetParentUuid */
1212	rawSetParentUuid,
1213	/* pfnGetParentModificationUuid */
1214	rawGetParentModificationUuid,
1215	/* pfnSetParentModificationUuid */
1216	rawSetParentModificationUuid,
1217	/* pfnDump */
1218	rawDump,
1219	/* pfnGetTimestamp */
1220	NULL,
1221	/* pfnGetParentTimestamp */
1222	NULL,
1223	/* pfnSetParentTimestamp */
1224	NULL,
1225	/* pfnGetParentFilename */
1226	NULL,
1227	/* pfnSetParentFilename */
1228	NULL,
1229	/* pfnComposeLocation */
1230	genericFileComposeLocation,
1231	/* pfnComposeName */
1232	genericFileComposeName,
1233	/* pfnCompact */
1234	NULL,
1235	/* pfnResize */
1236	NULL,
1237	/* pfnRepair */
1238	NULL,
1239	/* pfnTraverseMetadata */
1240	NULL
1241	};

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source: vbox/trunk/src/VBox/Storage/RAW.cpp@ 62793

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