VISO.cpp@ 86186

Last change on this file since 86186 was 84372, checked in by vboxsync, 5 years ago
Storage/VISO: Added some more logging, also for error cases.
Property svn:eol-style set to `native` Property svn:keywords set to `Author Date Id Revision`
File size: 33.0 KB

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1	/* $Id: VISO.cpp 84372 2020-05-19 15:08:57Z vboxsync $ */
2	/** @file
3	* VISO - Virtual ISO disk image, Core Code.
4	*/
5
6	/*
7	* Copyright (C) 2017-2020 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
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/ctype.h>
29	#include <iprt/fsisomaker.h>
30	#include <iprt/getopt.h>
31	#include <iprt/mem.h>
32	#include <iprt/path.h>
33	#include <iprt/string.h>
34	#include <iprt/uuid.h>
35
36	#include "VDBackends.h"
37	#include "VDBackendsInline.h"
38
39
40	/*********************************************************************************************************************************
41	* Defined Constants And Macros *
42	*********************************************************************************************************************************/
43	/** The maximum file size. */
44	#if ARCH_BITS >= 64
45	# define VISO_MAX_FILE_SIZE _32M
46	#else
47	# define VISO_MAX_FILE_SIZE _8M
48	#endif
49
50
51	/*********************************************************************************************************************************
52	* Structures and Typedefs *
53	*********************************************************************************************************************************/
54
55	/**
56	* VBox ISO maker image instance.
57	*/
58	typedef struct VISOIMAGE
59	{
60	/** The ISO maker output file handle.
61	* This is NIL if in VD_OPEN_FLAGS_INFO mode. */
62	RTVFSFILE hIsoFile;
63	/** The image size. */
64	uint64_t cbImage;
65	/** The UUID ofr the image. */
66	RTUUID Uuid;
67
68	/** Open flags passed by VD layer. */
69	uint32_t fOpenFlags;
70	/** Image name. Allocation follows the region list, no need to free. */
71	const char *pszFilename;
72	/** The parent director of pszFilename.
73	* Allocation follows the region list, no need to free. */
74	const char *pszCwd;
75
76	/** I/O interface. */
77	PVDINTERFACEIOINT pIfIo;
78	/** Error interface. */
79	PVDINTERFACEERROR pIfError;
80
81	/** Internal region list (variable size). */
82	VDREGIONLIST RegionList;
83	} VISOIMAGE;
84	/** Pointer to an VBox ISO make image instance. */
85	typedef VISOIMAGE *PVISOIMAGE;
86
87
88	/*********************************************************************************************************************************
89	* Global Variables *
90	*********************************************************************************************************************************/
91	/** NULL-terminated array of supported file extensions. */
92	static const VDFILEEXTENSION g_aVBoXIsoMakerFileExtensions[] =
93	{
94	//{ "vbox-iso-maker", VDTYPE_OPTICAL_DISC }, - clumsy.
95	{ "viso", VDTYPE_OPTICAL_DISC },
96	{ NULL, VDTYPE_INVALID }
97	};
98
99
100	/**
101	* Parses the UUID that follows the marker argument.
102	*
103	* @returns IPRT status code.
104	* @param pszMarker The marker.
105	* @param pUuid Where to return the UUID.
106	*/
107	static int visoParseUuid(char *pszMarker, PRTUUID pUuid)
108	{
109	/* Skip the marker. */
110	char ch;
111	while ( (ch = *pszMarker) != '\0'
112	&& !RT_C_IS_SPACE(ch)
113	&& ch != ':'
114	&& ch != '=')
115	pszMarker++;
116
117	/* Skip chars before the value. */
118	if ( ch == ':'
119	\|\| ch == '=')
120	ch = *++pszMarker;
121	else
122	while (RT_C_IS_SPACE(ch))
123	ch = *++pszMarker;
124	const char * const pszUuid = pszMarker;
125
126	/* Find the end of the UUID value. */
127	while ( ch != '\0'
128	&& !RT_C_IS_SPACE(ch))
129	ch = *++pszMarker;
130
131	/* Validate the value (temporarily terminate the value string) */
132	*pszMarker = '\0';
133	int rc = RTUuidFromStr(pUuid, pszUuid);
134	if (RT_SUCCESS(rc))
135	{
136	*pszMarker = ch;
137	return VINF_SUCCESS;
138	}
139
140	/* Complain and return VERR_VD_IMAGE_CORRUPTED to indicate we've identified
141	the right image format, but the producer got something wrong. */
142	if (pszUuid != pszMarker)
143	LogRel(("visoParseUuid: Malformed UUID '%s': %Rrc\n", pszUuid, rc));
144	else
145	LogRel(("visoParseUuid: Empty/missing UUID!\n"));
146	*pszMarker = ch;
147
148	return VERR_VD_IMAGE_CORRUPTED;
149	}
150
151
152	static int visoProbeWorker(const char *pszFilename, PVDINTERFACEIOINT pIfIo, PRTUUID pUuid)
153	{
154	PVDIOSTORAGE pStorage = NULL;
155	int rc = vdIfIoIntFileOpen(pIfIo, pszFilename, RTFILE_O_READ \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE, &pStorage);
156	if (RT_SUCCESS(rc))
157	{
158	/*
159	* Read the first part of the file.
160	*/
161	uint64_t cbFile = 0;
162	rc = vdIfIoIntFileGetSize(pIfIo, pStorage, &cbFile);
163	if (RT_SUCCESS(rc))
164	{
165	char szChunk[_1K];
166	size_t cbToRead = (size_t)RT_MIN(sizeof(szChunk) - 1, cbFile);
167	rc = vdIfIoIntFileReadSync(pIfIo, pStorage, 0 /off/, szChunk, cbToRead);
168	if (RT_SUCCESS(rc))
169	{
170	szChunk[cbToRead] = '\0';
171
172	/*
173	* Skip leading spaces and check for the eye-catcher.
174	*/
175	char *psz = szChunk;
176	while (RT_C_IS_SPACE(*psz))
177	psz++;
178	if (strncmp(psz, RT_STR_TUPLE("--iprt-iso-maker-file-marker")) == 0)
179	{
180	rc = visoParseUuid(psz, pUuid);
181	if (RT_SUCCESS(rc))
182	{
183	/*
184	* Check the file size.
185	*/
186	if (cbFile <= VISO_MAX_FILE_SIZE)
187	rc = VINF_SUCCESS;
188	else
189	{
190	LogRel(("visoProbeWorker: VERR_VD_INVALID_SIZE - cbFile=%#RX64 cbMaxFile=%#RX64\n",
191	cbFile, (uint64_t)VISO_MAX_FILE_SIZE));
192	rc = VERR_VD_INVALID_SIZE;
193	}
194	}
195	else
196	rc = VERR_VD_IMAGE_CORRUPTED;
197	}
198	else
199	rc = VERR_VD_GEN_INVALID_HEADER;
200	}
201	}
202	vdIfIoIntFileClose(pIfIo, pStorage);
203	}
204	LogFlowFunc(("returns %Rrc\n", rc));
205	return rc;
206	}
207
208	/**
209	* @interface_method_impl{VDIMAGEBACKEND,pfnProbe}
210	*/
211	static DECLCALLBACK(int) visoProbe(const char *pszFilename, PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
212	VDTYPE enmDesiredType, VDTYPE *penmType)
213	{
214	/*
215	* Validate input.
216	*/
217	AssertPtrReturn(penmType, VERR_INVALID_POINTER);
218	*penmType = VDTYPE_INVALID;
219
220	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
221	AssertReturn(*pszFilename, VERR_INVALID_POINTER);
222
223	PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage);
224	AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER);
225
226	RT_NOREF(pVDIfsDisk);
227
228	/*
229	* We can only fake DVD stuff, so fail if the desired type doesn't match up
230	*/
231	if (enmDesiredType != VDTYPE_OPTICAL_DISC && enmDesiredType != VDTYPE_INVALID)
232	return VERR_VD_GEN_INVALID_HEADER; /* Caller has strict, though undocument, status code expectations. */
233
234	/*
235	* Share worker with visoOpen and visoSetFlags.
236	*/
237	RTUUID UuidIgn;
238	int rc = visoProbeWorker(pszFilename, pIfIo, &UuidIgn);
239	if (RT_SUCCESS(rc))
240	*penmType = VDTYPE_OPTICAL_DISC;
241	else if (rc == VERR_VD_IMAGE_CORRUPTED \|\| rc == VERR_VD_INVALID_SIZE)
242	*penmType = VDTYPE_OPTICAL_DISC;
243	else
244	rc = VERR_VD_GEN_INVALID_HEADER; /* Caller has strict, though undocument, status code expectations. */
245
246	LogFlowFunc(("returns %Rrc - penmType=%d\n", rc, penmType));
247	return rc;
248	}
249
250
251	/**
252	* Worker for visoOpen and visoSetOpenFlags that creates a VFS file for the ISO.
253	*
254	* This also updates cbImage and the Uuid members.
255	*
256	* @returns VBox status code.
257	* @param pThis The VISO image instance.
258	*/
259	static int visoOpenWorker(PVISOIMAGE pThis)
260	{
261	/*
262	* Open the file and read it into memory.
263	*/
264	PVDIOSTORAGE pStorage = NULL;
265	int rc = vdIfIoIntFileOpen(pThis->pIfIo, pThis->pszFilename, RTFILE_O_READ \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE, &pStorage);
266	if (RT_FAILURE(rc))
267	{
268	LogRel(("VISO: Unable to open file '%s': %Rrc\n", pThis->pszFilename, rc));
269	return rc;
270	}
271
272	LogRel(("VISO: Handling file '%s'\n", pThis->pszFilename));
273
274	/*
275	* Read the file into memory, prefixing it with a dummy command name.
276	*/
277	uint64_t cbFile = 0;
278	rc = vdIfIoIntFileGetSize(pThis->pIfIo, pStorage, &cbFile);
279	if (RT_SUCCESS(rc))
280	{
281	if (cbFile <= VISO_MAX_FILE_SIZE)
282	{
283	static char const s_szCmdPrefix[] = "VBox-Iso-Maker ";
284
285	char pszContent = (char )RTMemTmpAlloc(sizeof(s_szCmdPrefix) + cbFile);
286	if (pszContent)
287	{
288	char *pszReadDst = &pszContent[sizeof(s_szCmdPrefix) - 1];
289	rc = vdIfIoIntFileReadSync(pThis->pIfIo, pStorage, 0 /off/, pszReadDst, (size_t)cbFile);
290	if (RT_SUCCESS(rc))
291	{
292	/*
293	* Check the file marker and get the UUID that follows it.
294	* Ignore leading blanks.
295	*/
296	pszReadDst[(size_t)cbFile] = '\0';
297	memcpy(pszContent, s_szCmdPrefix, sizeof(s_szCmdPrefix) - 1);
298
299	while (RT_C_IS_SPACE(*pszReadDst))
300	pszReadDst++;
301	if (strncmp(pszReadDst, RT_STR_TUPLE("--iprt-iso-maker-file-marker")) == 0)
302	{
303	rc = visoParseUuid(pszReadDst, &pThis->Uuid);
304	if (RT_SUCCESS(rc))
305	{
306	/*
307	* Make sure it's valid UTF-8 before letting
308	*/
309	rc = RTStrValidateEncodingEx(pszContent, sizeof(s_szCmdPrefix) + cbFile,
310	RTSTR_VALIDATE_ENCODING_EXACT_LENGTH
311	\| RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED);
312	if (RT_SUCCESS(rc))
313	{
314	/*
315	* Convert it into an argument vector.
316	* Free the content afterwards to reduce memory pressure.
317	*/
318	uint32_t fGetOpt = strncmp(pszReadDst, RT_STR_TUPLE("--iprt-iso-maker-file-marker-ms")) != 0
319	? RTGETOPTARGV_CNV_QUOTE_BOURNE_SH : RTGETOPTARGV_CNV_QUOTE_MS_CRT;
320	fGetOpt \|= RTGETOPTARGV_CNV_MODIFY_INPUT;
321	char **papszArgs;
322	int cArgs;
323	rc = RTGetOptArgvFromString(&papszArgs, &cArgs, pszContent, fGetOpt, NULL);
324
325	if (RT_SUCCESS(rc))
326	{
327	/*
328	* Open the parent directory and use that as CWD for relative references.
329	*/
330	RTVFSDIR hVfsCwd;
331	rc = RTVfsChainOpenDir(pThis->pszCwd, 0 /fOpen/, &hVfsCwd, NULL, NULL);
332	if (RT_SUCCESS(rc))
333	{
334	/*
335	* Try instantiate the ISO image maker.
336	* Free the argument vector afterward to reduce memory pressure.
337	*/
338	RTVFSFILE hVfsFile;
339	RTERRINFOSTATIC ErrInfo;
340	rc = RTFsIsoMakerCmdEx(cArgs, papszArgs, hVfsCwd, pThis->pszCwd,
341	&hVfsFile, RTErrInfoInitStatic(&ErrInfo));
342
343	RTVfsDirRelease(hVfsCwd);
344
345	RTGetOptArgvFreeEx(papszArgs, fGetOpt);
346	papszArgs = NULL;
347
348	if (RT_SUCCESS(rc))
349	{
350	uint64_t cbImage;
351	rc = RTVfsFileQuerySize(hVfsFile, &cbImage);
352	if (RT_SUCCESS(rc))
353	{
354	/*
355	* Update the state.
356	*/
357	pThis->cbImage = cbImage;
358	pThis->RegionList.aRegions[0].cRegionBlocksOrBytes = cbImage;
359
360	pThis->hIsoFile = hVfsFile;
361	hVfsFile = NIL_RTVFSFILE;
362
363	rc = VINF_SUCCESS;
364	LogRel(("VISO: %'RU64 bytes (%#RX64) - %s\n", cbImage, cbImage, pThis->pszFilename));
365	}
366
367	RTVfsFileRelease(hVfsFile);
368	}
369	else if (RTErrInfoIsSet(&ErrInfo.Core))
370	{
371	LogRel(("visoOpenWorker: RTFsIsoMakerCmdEx failed: %Rrc - %s\n", rc, ErrInfo.Core.pszMsg));
372	vdIfError(pThis->pIfError, rc, RT_SRC_POS, "VISO: %s", ErrInfo.Core.pszMsg);
373	}
374	else
375	{
376	LogRel(("visoOpenWorker: RTFsIsoMakerCmdEx failed: %Rrc\n", rc));
377	vdIfError(pThis->pIfError, rc, RT_SRC_POS, "VISO: RTFsIsoMakerCmdEx failed: %Rrc", rc);
378	}
379	}
380	else
381	vdIfError(pThis->pIfError, rc, RT_SRC_POS,
382	"VISO: Failed to open parent dir of: %s", pThis->pszFilename);
383	}
384	else
385	vdIfError(pThis->pIfError, rc, RT_SRC_POS, "VISO: RTGetOptArgvFromString failed: %Rrc", rc);
386	}
387	else
388	vdIfError(pThis->pIfError, rc, RT_SRC_POS, "VISO: Invalid file encoding");
389	}
390	else
391	vdIfError(pThis->pIfError, rc, RT_SRC_POS, "VISO: Parsing UUID failed: %Rrc", rc);
392	}
393	else
394	rc = VERR_VD_GEN_INVALID_HEADER;
395	}
396	else
397	vdIfError(pThis->pIfError, rc, RT_SRC_POS, "VISO: Reading file failed: %Rrc", rc);
398
399	RTMemTmpFree(pszContent);
400	}
401	else
402	rc = VERR_NO_TMP_MEMORY;
403	}
404	else
405	{
406	LogRel(("visoOpen: VERR_VD_INVALID_SIZE - cbFile=%#RX64 cbMaxFile=%#RX64\n",
407	cbFile, (uint64_t)VISO_MAX_FILE_SIZE));
408	rc = VERR_VD_INVALID_SIZE;
409	}
410	}
411
412	if (RT_FAILURE(rc))
413	LogRel(("VISO: Handling of file '%s' failed with %Rrc\n", pThis->pszFilename, rc));
414
415	vdIfIoIntFileClose(pThis->pIfIo, pStorage);
416	return rc;
417	}
418
419
420	/**
421	* @interface_method_impl{VDIMAGEBACKEND,pfnOpen}
422	*/
423	static DECLCALLBACK(int) visoOpen(const char *pszFilename, unsigned uOpenFlags, PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
424	VDTYPE enmType, void **ppBackendData)
425	{
426	uint32_t const fOpenFlags = uOpenFlags;
427	LogFlowFunc(("pszFilename='%s' fOpenFlags=%#x pVDIfsDisk=%p pVDIfsImage=%p enmType=%u ppBackendData=%p\n",
428	pszFilename, fOpenFlags, pVDIfsDisk, pVDIfsImage, enmType, ppBackendData));
429
430	/*
431	* Validate input.
432	*/
433	AssertPtrReturn(ppBackendData, VERR_INVALID_POINTER);
434	*ppBackendData = NULL;
435
436	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
437	AssertReturn(*pszFilename, VERR_INVALID_POINTER);
438
439	AssertReturn(!(fOpenFlags & ~VD_OPEN_FLAGS_MASK), VERR_INVALID_FLAGS);
440
441	PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage);
442	AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER);
443
444	PVDINTERFACEERROR pIfError = VDIfErrorGet(pVDIfsDisk);
445
446	AssertReturn(enmType == VDTYPE_OPTICAL_DISC, VERR_NOT_SUPPORTED);
447
448	/*
449	* Allocate and initialize the backend image instance data.
450	*/
451	int rc;
452	size_t cbFilename = strlen(pszFilename) + 1;
453	PVISOIMAGE pThis = (PVISOIMAGE)RTMemAllocZ(RT_UOFFSETOF(VISOIMAGE, RegionList.aRegions[1]) + cbFilename * 2);
454	if (pThis)
455	{
456	pThis->hIsoFile = NIL_RTVFSFILE;
457	pThis->cbImage = 0;
458	pThis->fOpenFlags = fOpenFlags;
459	pThis->pIfIo = pIfIo;
460	pThis->pIfError = pIfError;
461
462	pThis->RegionList.fFlags = 0;
463	pThis->RegionList.cRegions = 1;
464	pThis->RegionList.aRegions[0].offRegion = 0;
465	pThis->RegionList.aRegions[0].cRegionBlocksOrBytes = 0;
466	pThis->RegionList.aRegions[0].cbBlock = 2048;
467	pThis->RegionList.aRegions[0].enmDataForm = VDREGIONDATAFORM_RAW;
468	pThis->RegionList.aRegions[0].enmMetadataForm = VDREGIONMETADATAFORM_NONE;
469	pThis->RegionList.aRegions[0].cbData = 2048;
470	pThis->RegionList.aRegions[0].cbMetadata = 0;
471
472	char pszDst = (char )&pThis->RegionList.aRegions[1];
473	memcpy(pszDst, pszFilename, cbFilename);
474	pThis->pszFilename = pszDst;
475	pszDst[cbFilename - 1] = '\0';
476	pszDst += cbFilename;
477
478	memcpy(pszDst, pszFilename, cbFilename);
479	pThis->pszCwd = pszDst;
480	pszDst[cbFilename - 1] = '\0';
481	RTPathStripFilename(pszDst);
482
483	/*
484	* Only go all the way if this isn't an info query. Re-mastering an ISO
485	* can potentially be a lot of work and we don't want to go thru with it
486	* just because the GUI wants to display the image size.
487	*/
488	if (!(fOpenFlags & VD_OPEN_FLAGS_INFO))
489	rc = visoOpenWorker(pThis);
490	else
491	rc = visoProbeWorker(pThis->pszFilename, pThis->pIfIo, &pThis->Uuid);
492	if (RT_SUCCESS(rc))
493	{
494	*ppBackendData = pThis;
495	LogFlowFunc(("returns VINF_SUCCESS (UUID=%RTuuid, pszFilename=%s)\n", &pThis->Uuid, pThis->pszFilename));
496	return VINF_SUCCESS;
497	}
498
499	RTMemFree(pThis);
500	}
501	else
502	rc = VERR_NO_MEMORY;
503	LogFlowFunc(("returns %Rrc\n", rc));
504	return rc;
505	}
506
507
508	/**
509	* @interface_method_impl{VDIMAGEBACKEND,pfnClose}
510	*/
511	static DECLCALLBACK(int) visoClose(void *pBackendData, bool fDelete)
512	{
513	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
514	LogFlowFunc(("pThis=%p fDelete=%RTbool\n", pThis, fDelete));
515
516	if (pThis)
517	{
518	if (fDelete)
519	vdIfIoIntFileDelete(pThis->pIfIo, pThis->pszFilename);
520
521	if (pThis->hIsoFile != NIL_RTVFSFILE)
522	{
523	RTVfsFileRelease(pThis->hIsoFile);
524	pThis->hIsoFile = NIL_RTVFSFILE;
525	}
526
527	RTMemFree(pThis);
528	}
529
530	LogFlowFunc(("returns VINF_SUCCESS\n"));
531	return VINF_SUCCESS;
532	}
533
534	/**
535	* @interface_method_impl{VDIMAGEBACKEND,pfnRead}
536	*/
537	static DECLCALLBACK(int) visoRead(void pBackendData, uint64_t uOffset, size_t cbToRead, PVDIOCTX pIoCtx, size_t pcbActuallyRead)
538	{
539	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
540	uint64_t off = uOffset;
541	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
542	AssertReturn(pThis->hIsoFile != NIL_RTVFSFILE, VERR_VD_NOT_OPENED);
543	LogFlowFunc(("pThis=%p off=%#RX64 cbToRead=%#zx pIoCtx=%p pcbActuallyRead=%p\n", pThis, off, cbToRead, pIoCtx, pcbActuallyRead));
544
545	/*
546	* Check request.
547	*/
548	AssertReturn( off < pThis->cbImage
549	\|\| (off == pThis->cbImage && cbToRead == 0), VERR_EOF);
550
551	uint64_t cbLeftInImage = pThis->cbImage - off;
552	if (cbToRead >= cbLeftInImage)
553	cbToRead = cbLeftInImage; /* ASSUMES the caller can deal with this, given the pcbActuallyRead parameter... */
554
555	/*
556	* Work the I/O context using vdIfIoIntIoCtxSegArrayCreate.
557	*/
558	int rc = VINF_SUCCESS;
559	size_t cbActuallyRead = 0;
560	while (cbToRead > 0)
561	{
562	RTSGSEG Seg;
563	unsigned cSegs = 1;
564	size_t cbThisRead = vdIfIoIntIoCtxSegArrayCreate(pThis->pIfIo, pIoCtx, &Seg, &cSegs, cbToRead);
565	AssertBreakStmt(cbThisRead != 0, rc = VERR_INTERNAL_ERROR_2);
566	Assert(cbThisRead == Seg.cbSeg);
567
568	rc = RTVfsFileReadAt(pThis->hIsoFile, off, Seg.pvSeg, cbThisRead, NULL);
569	AssertRCBreak(rc);
570
571	/* advance. */
572	cbActuallyRead += cbThisRead;
573	off += cbThisRead;
574	cbToRead -= cbThisRead;
575	}
576
577	*pcbActuallyRead = cbActuallyRead;
578	return rc;
579	}
580
581	/**
582	* @interface_method_impl{VDIMAGEBACKEND,pfnWrite}
583	*/
584	static DECLCALLBACK(int) visoWrite(void *pBackendData, uint64_t uOffset, size_t cbToWrite,
585	PVDIOCTX pIoCtx, size_t pcbWriteProcess, size_t pcbPreRead,
586	size_t *pcbPostRead, unsigned fWrite)
587	{
588	RT_NOREF(uOffset, cbToWrite, pIoCtx, pcbWriteProcess, pcbPreRead, pcbPostRead, fWrite);
589	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
590	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
591	AssertReturn(pThis->hIsoFile != NIL_RTVFSFILE, VERR_VD_NOT_OPENED);
592	LogFlowFunc(("pThis=%p off=%#RX64 pIoCtx=%p cbToWrite=%#zx pcbWriteProcess=%p pcbPreRead=%p pcbPostRead=%p -> VERR_VD_IMAGE_READ_ONLY\n",
593	pThis, uOffset, pIoCtx, cbToWrite, pcbWriteProcess, pcbPreRead, pcbPostRead));
594	return VERR_VD_IMAGE_READ_ONLY;
595	}
596
597	/**
598	* @interface_method_impl{VDIMAGEBACKEND,pfnFlush}
599	*/
600	static DECLCALLBACK(int) visoFlush(void *pBackendData, PVDIOCTX pIoCtx)
601	{
602	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
603	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
604	AssertReturn(pThis->hIsoFile != NIL_RTVFSFILE, VERR_VD_NOT_OPENED);
605	RT_NOREF(pIoCtx);
606	return VINF_SUCCESS;
607	}
608
609	/**
610	* @interface_method_impl{VDIMAGEBACKEND,pfnGetVersion}
611	*/
612	static DECLCALLBACK(unsigned) visoGetVersion(void *pBackendData)
613	{
614	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
615	AssertPtrReturn(pThis, 0);
616	LogFlowFunc(("pThis=%#p -> 1\n", pThis));
617	return 1;
618	}
619
620	/**
621	* @interface_method_impl{VDIMAGEBACKEND,pfnGetFileSize}
622	*/
623	static DECLCALLBACK(uint64_t) visoGetFileSize(void *pBackendData)
624	{
625	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
626	AssertPtrReturn(pThis, 0);
627	LogFlowFunc(("pThis=%p -> %RX64 (%s)\n", pThis, pThis->cbImage, pThis->hIsoFile == NIL_RTVFSFILE ? "fake!" : "real"));
628	return pThis->cbImage;
629	}
630
631	/**
632	* @interface_method_impl{VDIMAGEBACKEND,pfnGetPCHSGeometry}
633	*/
634	static DECLCALLBACK(int) visoGetPCHSGeometry(void *pBackendData, PVDGEOMETRY pPCHSGeometry)
635	{
636	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
637	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
638	LogFlowFunc(("pThis=%p pPCHSGeometry=%p -> VERR_NOT_SUPPORTED\n", pThis, pPCHSGeometry));
639	RT_NOREF(pPCHSGeometry);
640	return VERR_NOT_SUPPORTED;
641	}
642
643	/**
644	* @interface_method_impl{VDIMAGEBACKEND,pfnSetPCHSGeometry}
645	*/
646	static DECLCALLBACK(int) visoSetPCHSGeometry(void *pBackendData, PCVDGEOMETRY pPCHSGeometry)
647	{
648	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
649	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
650	LogFlowFunc(("pThis=%p pPCHSGeometry=%p:{%u/%u/%u} -> VERR_VD_IMAGE_READ_ONLY\n",
651	pThis, pPCHSGeometry, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
652	RT_NOREF(pPCHSGeometry);
653	return VERR_VD_IMAGE_READ_ONLY;
654	}
655
656	/**
657	* @interface_method_impl{VDIMAGEBACKEND,pfnGetLCHSGeometry}
658	*/
659	static DECLCALLBACK(int) visoGetLCHSGeometry(void *pBackendData, PVDGEOMETRY pLCHSGeometry)
660	{
661	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
662	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
663	LogFlowFunc(("pThis=%p pLCHSGeometry=%p -> VERR_NOT_SUPPORTED\n", pThis, pLCHSGeometry));
664	RT_NOREF(pLCHSGeometry);
665	return VERR_NOT_SUPPORTED;
666	}
667
668	/**
669	* @interface_method_impl{VDIMAGEBACKEND,pfnSetLCHSGeometry}
670	*/
671	static DECLCALLBACK(int) visoSetLCHSGeometry(void *pBackendData, PCVDGEOMETRY pLCHSGeometry)
672	{
673	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
674	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
675	LogFlowFunc(("pThis=%p pLCHSGeometry=%p:{%u/%u/%u} -> VERR_VD_IMAGE_READ_ONLY\n",
676	pThis, pLCHSGeometry, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
677	RT_NOREF(pLCHSGeometry);
678	return VERR_VD_IMAGE_READ_ONLY;
679	}
680
681	/**
682	* @interface_method_impl{VDIMAGEBACKEND,pfnQueryRegions}
683	*/
684	static DECLCALLBACK(int) visoQueryRegions(void pBackendData, PCVDREGIONLIST ppRegionList)
685	{
686	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
687	*ppRegionList = NULL;
688	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
689
690	*ppRegionList = &pThis->RegionList;
691	LogFlowFunc(("returns VINF_SUCCESS (one region: 0 LB %RX64; pThis=%p)\n", pThis->RegionList.aRegions[0].cbData, pThis));
692	return VINF_SUCCESS;
693	}
694
695	/**
696	* @interface_method_impl{VDIMAGEBACKEND,pfnRegionListRelease}
697	*/
698	static DECLCALLBACK(void) visoRegionListRelease(void *pBackendData, PCVDREGIONLIST pRegionList)
699	{
700	/* Nothing to do here. Just assert the input to avoid unused parameter warnings. */
701	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
702	LogFlowFunc(("pThis=%p pRegionList=%p\n", pThis, pRegionList));
703	AssertPtrReturnVoid(pThis);
704	AssertReturnVoid(pRegionList == &pThis->RegionList \|\| pRegionList == 0);
705	}
706
707	/**
708	* @interface_method_impl{VDIMAGEBACKEND,pfnGetImageFlags}
709	*/
710	static DECLCALLBACK(unsigned) visoGetImageFlags(void *pBackendData)
711	{
712	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
713	LogFlowFunc(("pThis=%p -> VD_IMAGE_FLAGS_NONE\n", pThis));
714	AssertPtrReturn(pThis, VD_IMAGE_FLAGS_NONE);
715	return VD_IMAGE_FLAGS_NONE;
716	}
717
718	/**
719	* @interface_method_impl{VDIMAGEBACKEND,pfnGetOpenFlags}
720	*/
721	static DECLCALLBACK(unsigned) visoGetOpenFlags(void *pBackendData)
722	{
723	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
724	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
725	AssertPtrReturn(pThis, 0);
726
727	LogFlowFunc(("returns %#x\n", pThis->fOpenFlags));
728	return pThis->fOpenFlags;
729	}
730
731	/**
732	* @interface_method_impl{VDIMAGEBACKEND,pfnSetOpenFlags}
733	*/
734	static DECLCALLBACK(int) visoSetOpenFlags(void *pBackendData, unsigned uOpenFlags)
735	{
736	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
737	LogFlowFunc(("pThis=%p fOpenFlags=%#x\n", pThis, uOpenFlags));
738
739	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
740	uint32_t const fSupported = VD_OPEN_FLAGS_READONLY \| VD_OPEN_FLAGS_INFO
741	\| VD_OPEN_FLAGS_ASYNC_IO \| VD_OPEN_FLAGS_SHAREABLE
742	\| VD_OPEN_FLAGS_SEQUENTIAL \| VD_OPEN_FLAGS_SKIP_CONSISTENCY_CHECKS;
743	AssertMsgReturn(!(uOpenFlags & ~fSupported), ("fOpenFlags=%#x\n", uOpenFlags), VERR_INVALID_FLAGS);
744
745	/*
746	* Only react if we switch from VD_OPEN_FLAGS_INFO to non-VD_OPEN_FLAGS_INFO mode,
747	* becuase that means we need to open the image.
748	*/
749	if ( (pThis->fOpenFlags & VD_OPEN_FLAGS_INFO)
750	&& !(uOpenFlags & VD_OPEN_FLAGS_INFO)
751	&& pThis->hIsoFile == NIL_RTVFSFILE)
752	{
753	int rc = visoOpenWorker(pThis);
754	if (RT_FAILURE(rc))
755	{
756	LogFlowFunc(("returns %Rrc\n", rc));
757	return rc;
758	}
759	}
760
761	/*
762	* Update the flags.
763	*/
764	pThis->fOpenFlags &= ~fSupported;
765	pThis->fOpenFlags \|= fSupported & uOpenFlags;
766	pThis->fOpenFlags \|= VD_OPEN_FLAGS_READONLY;
767	if (pThis->hIsoFile != NIL_RTVFSFILE)
768	pThis->fOpenFlags &= ~VD_OPEN_FLAGS_INFO;
769
770	return VINF_SUCCESS;
771	}
772
773	#define uOpenFlags fOpenFlags /* sigh */
774
775	/**
776	* @interface_method_impl{VDIMAGEBACKEND,pfnGetComment}
777	*/
778	VD_BACKEND_CALLBACK_GET_COMMENT_DEF_NOT_SUPPORTED(visoGetComment);
779
780	/**
781	* @interface_method_impl{VDIMAGEBACKEND,pfnSetComment}
782	*/
783	VD_BACKEND_CALLBACK_SET_COMMENT_DEF_NOT_SUPPORTED(visoSetComment, PVISOIMAGE);
784
785	/**
786	* @interface_method_impl{VDIMAGEBACKEND,pfnGetUuid}
787	*/
788	static DECLCALLBACK(int) visoGetUuid(void *pBackendData, PRTUUID pUuid)
789	{
790	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
791	*pUuid = pThis->Uuid;
792	LogFlowFunc(("returns VIF_SUCCESS (%RTuuid)\n", pUuid));
793	return VINF_SUCCESS;
794	}
795
796	/**
797	* @interface_method_impl{VDIMAGEBACKEND,pfnSetUuid}
798	*/
799	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(visoSetUuid, PVISOIMAGE);
800
801	/**
802	* @interface_method_impl{VDIMAGEBACKEND,pfnGetModificationUuid}
803	*/
804	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(visoGetModificationUuid);
805
806	/**
807	* @interface_method_impl{VDIMAGEBACKEND,pfnSetModificationUuid}
808	*/
809	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(visoSetModificationUuid, PVISOIMAGE);
810
811	/**
812	* @interface_method_impl{VDIMAGEBACKEND,pfnGetParentUuid}
813	*/
814	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(visoGetParentUuid);
815
816	/**
817	* @interface_method_impl{VDIMAGEBACKEND,pfnSetParentUuid}
818	*/
819	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(visoSetParentUuid, PVISOIMAGE);
820
821	/**
822	* @interface_method_impl{VDIMAGEBACKEND,pfnGetParentModificationUuid}
823	*/
824	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(visoGetParentModificationUuid);
825
826	/**
827	* @interface_method_impl{VDIMAGEBACKEND,pfnSetParentModificationUuid}
828	*/
829	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(visoSetParentModificationUuid, PVISOIMAGE);
830
831	#undef uOpenFlags
832
833	/**
834	* @interface_method_impl{VDIMAGEBACKEND,pfnDump}
835	*/
836	static DECLCALLBACK(void) visoDump(void *pBackendData)
837	{
838	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
839	AssertPtrReturnVoid(pThis);
840
841	vdIfErrorMessage(pThis->pIfError, "Dumping CUE image '%s' fOpenFlags=%x cbImage=%#RX64\n",
842	pThis->pszFilename, pThis->fOpenFlags, pThis->cbImage);
843	}
844
845
846
847	/**
848	* VBox ISO maker backend.
849	*/
850	const VDIMAGEBACKEND g_VBoxIsoMakerBackend =
851	{
852	/* u32Version */
853	VD_IMGBACKEND_VERSION,
854	/* pszBackendName */
855	"VBoxIsoMaker",
856	/* uBackendCaps */
857	VD_CAP_FILE,
858	/* paFileExtensions */
859	g_aVBoXIsoMakerFileExtensions,
860	/* paConfigInfo */
861	NULL,
862	/* pfnProbe */
863	visoProbe,
864	/* pfnOpen */
865	visoOpen,
866	/* pfnCreate */
867	NULL,
868	/* pfnRename */
869	NULL,
870	/* pfnClose */
871	visoClose,
872	/* pfnRead */
873	visoRead,
874	/* pfnWrite */
875	visoWrite,
876	/* pfnFlush */
877	visoFlush,
878	/* pfnDiscard */
879	NULL,
880	/* pfnGetVersion */
881	visoGetVersion,
882	/* pfnGetFileSize */
883	visoGetFileSize,
884	/* pfnGetPCHSGeometry */
885	visoGetPCHSGeometry,
886	/* pfnSetPCHSGeometry */
887	visoSetPCHSGeometry,
888	/* pfnGetLCHSGeometry */
889	visoGetLCHSGeometry,
890	/* pfnSetLCHSGeometry */
891	visoSetLCHSGeometry,
892	/* pfnQueryRegions */
893	visoQueryRegions,
894	/* pfnRegionListRelease */
895	visoRegionListRelease,
896	/* pfnGetImageFlags */
897	visoGetImageFlags,
898	/* pfnGetOpenFlags */
899	visoGetOpenFlags,
900	/* pfnSetOpenFlags */
901	visoSetOpenFlags,
902	/* pfnGetComment */
903	visoGetComment,
904	/* pfnSetComment */
905	visoSetComment,
906	/* pfnGetUuid */
907	visoGetUuid,
908	/* pfnSetUuid */
909	visoSetUuid,
910	/* pfnGetModificationUuid */
911	visoGetModificationUuid,
912	/* pfnSetModificationUuid */
913	visoSetModificationUuid,
914	/* pfnGetParentUuid */
915	visoGetParentUuid,
916	/* pfnSetParentUuid */
917	visoSetParentUuid,
918	/* pfnGetParentModificationUuid */
919	visoGetParentModificationUuid,
920	/* pfnSetParentModificationUuid */
921	visoSetParentModificationUuid,
922	/* pfnDump */
923	visoDump,
924	/* pfnGetTimestamp */
925	NULL,
926	/* pfnGetParentTimestamp */
927	NULL,
928	/* pfnSetParentTimestamp */
929	NULL,
930	/* pfnGetParentFilename */
931	NULL,
932	/* pfnSetParentFilename */
933	NULL,
934	/* pfnComposeLocation */
935	genericFileComposeLocation,
936	/* pfnComposeName */
937	genericFileComposeName,
938	/* pfnCompact */
939	NULL,
940	/* pfnResize */
941	NULL,
942	/* pfnRepair */
943	NULL,
944	/* pfnTraverseMetadata */
945	NULL,
946	/* u32VersionEnd */
947	VD_IMGBACKEND_VERSION
948	};
949

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source: vbox/trunk/src/VBox/Storage/VISO.cpp@ 86186

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