VISO.cpp@ 76570

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1	/* $Id: VISO.cpp 76553 2019-01-01 01:45:53Z vboxsync $ */
2	/** @file
3	* VISO - Virtual ISO disk image, Core Code.
4	*/
5
6	/*
7	* Copyright (C) 2017-2019 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, VDTYPE penmType)
212	{
213	/*
214	* Validate input.
215	*/
216	AssertPtrReturn(penmType, VERR_INVALID_POINTER);
217	*penmType = VDTYPE_INVALID;
218
219	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
220	AssertReturn(*pszFilename, VERR_INVALID_POINTER);
221
222	PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage);
223	AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER);
224
225	RT_NOREF(pVDIfsDisk);
226
227	/*
228	* Share worker with visoOpen and visoSetFlags.
229	*/
230	RTUUID UuidIgn;
231	int rc = visoProbeWorker(pszFilename, pIfIo, &UuidIgn);
232	if (RT_SUCCESS(rc))
233	*penmType = VDTYPE_OPTICAL_DISC;
234	else if (rc == VERR_VD_IMAGE_CORRUPTED \|\| rc == VERR_VD_INVALID_SIZE)
235	*penmType = VDTYPE_OPTICAL_DISC;
236	else
237	rc = VERR_VD_GEN_INVALID_HEADER; /* Caller has strict, though undocument, status code expectations. */
238
239	LogFlowFunc(("returns %Rrc - penmType=%d\n", rc, penmType));
240	return rc;
241	}
242
243
244	/**
245	* Worker for visoOpen and visoSetOpenFlags that creates a VFS file for the ISO.
246	*
247	* This also updates cbImage and the Uuid members.
248	*
249	* @returns VBox status code.
250	* @param pThis The VISO image instance.
251	*/
252	static int visoOpenWorker(PVISOIMAGE pThis)
253	{
254	/*
255	* Open the file and read it into memory.
256	*/
257	PVDIOSTORAGE pStorage = NULL;
258	int rc = vdIfIoIntFileOpen(pThis->pIfIo, pThis->pszFilename, RTFILE_O_READ \| RTFILE_O_OPEN \| RTFILE_O_DENY_NONE, &pStorage);
259	if (RT_FAILURE(rc))
260	return rc;
261
262	/*
263	* Read the file into memory, prefixing it with a dummy command name.
264	*/
265	uint64_t cbFile = 0;
266	rc = vdIfIoIntFileGetSize(pThis->pIfIo, pStorage, &cbFile);
267	if (RT_SUCCESS(rc))
268	{
269	if (cbFile <= VISO_MAX_FILE_SIZE)
270	{
271	static char const s_szCmdPrefix[] = "VBox-Iso-Maker ";
272
273	char pszContent = (char )RTMemTmpAlloc(sizeof(s_szCmdPrefix) + cbFile);
274	if (pszContent)
275	{
276	char *pszReadDst = &pszContent[sizeof(s_szCmdPrefix) - 1];
277	rc = vdIfIoIntFileReadSync(pThis->pIfIo, pStorage, 0 /off/, pszReadDst, (size_t)cbFile);
278	if (RT_SUCCESS(rc))
279	{
280	/*
281	* Check the file marker and get the UUID that follows it.
282	* Ignore leading blanks.
283	*/
284	pszReadDst[(size_t)cbFile] = '\0';
285	memcpy(pszContent, s_szCmdPrefix, sizeof(s_szCmdPrefix) - 1);
286
287	while (RT_C_IS_SPACE(*pszReadDst))
288	pszReadDst++;
289	if (strncmp(pszReadDst, RT_STR_TUPLE("--iprt-iso-maker-file-marker")) == 0)
290	{
291	rc = visoParseUuid(pszReadDst, &pThis->Uuid);
292	if (RT_SUCCESS(rc))
293	{
294	/*
295	* Make sure it's valid UTF-8 before letting
296	*/
297	rc = RTStrValidateEncodingEx(pszContent, sizeof(s_szCmdPrefix) + cbFile,
298	RTSTR_VALIDATE_ENCODING_EXACT_LENGTH
299	\| RTSTR_VALIDATE_ENCODING_ZERO_TERMINATED);
300	if (RT_SUCCESS(rc))
301	{
302	/*
303	* Convert it into an argument vector.
304	* Free the content afterwards to reduce memory pressure.
305	*/
306	uint32_t fGetOpt = strncmp(pszReadDst, RT_STR_TUPLE("--iprt-iso-maker-file-marker-ms")) != 0
307	? RTGETOPTARGV_CNV_QUOTE_BOURNE_SH : RTGETOPTARGV_CNV_QUOTE_MS_CRT;
308	fGetOpt \|= RTGETOPTARGV_CNV_MODIFY_INPUT;
309	char **papszArgs;
310	int cArgs;
311	rc = RTGetOptArgvFromString(&papszArgs, &cArgs, pszContent, fGetOpt, NULL);
312
313	if (RT_SUCCESS(rc))
314	{
315	/*
316	* Open the parent directory and use that as CWD for relative references.
317	*/
318	RTVFSDIR hVfsCwd;
319	rc = RTVfsChainOpenDir(pThis->pszCwd, 0 /fOpen/, &hVfsCwd, NULL, NULL);
320	if (RT_SUCCESS(rc))
321	{
322	/*
323	* Try instantiate the ISO image maker.
324	* Free the argument vector afterward to reduce memory pressure.
325	*/
326	RTVFSFILE hVfsFile;
327	RTERRINFOSTATIC ErrInfo;
328	rc = RTFsIsoMakerCmdEx(cArgs, papszArgs, hVfsCwd, pThis->pszCwd,
329	&hVfsFile, RTErrInfoInitStatic(&ErrInfo));
330
331	RTVfsDirRelease(hVfsCwd);
332
333	RTGetOptArgvFreeEx(papszArgs, fGetOpt);
334	papszArgs = NULL;
335
336	if (RT_SUCCESS(rc))
337	{
338	uint64_t cbImage;
339	rc = RTVfsFileGetSize(hVfsFile, &cbImage);
340	if (RT_SUCCESS(rc))
341	{
342	/*
343	* Update the state.
344	*/
345	pThis->cbImage = cbImage;
346	pThis->RegionList.aRegions[0].cRegionBlocksOrBytes = cbImage;
347
348	pThis->hIsoFile = hVfsFile;
349	hVfsFile = NIL_RTVFSFILE;
350
351	rc = VINF_SUCCESS;
352	LogRel(("VISO: %'RU64 bytes (%#RX64) - %s\n", cbImage, cbImage, pThis->pszFilename));
353	}
354
355	RTVfsFileRelease(hVfsFile);
356	}
357	else if (RTErrInfoIsSet(&ErrInfo.Core))
358	{
359	LogRel(("visoOpenWorker: RTFsIsoMakerCmdEx failed: %Rrc - %s\n", rc, ErrInfo.Core.pszMsg));
360	vdIfError(pThis->pIfError, rc, RT_SRC_POS, "VISO: %s", ErrInfo.Core.pszMsg);
361	}
362	else
363	{
364	LogRel(("visoOpenWorker: RTFsIsoMakerCmdEx failed: %Rrc\n", rc));
365	vdIfError(pThis->pIfError, rc, RT_SRC_POS, "VISO: RTFsIsoMakerCmdEx failed: %Rrc", rc);
366	}
367	}
368	else
369	vdIfError(pThis->pIfError, rc, RT_SRC_POS,
370	"VISO: Failed to open parent dir of: %s", pThis->pszFilename);
371	}
372	}
373	else
374	vdIfError(pThis->pIfError, rc, RT_SRC_POS, "VISO: Invalid file encoding");
375	}
376	}
377	else
378	rc = VERR_VD_GEN_INVALID_HEADER;
379	}
380
381	RTMemTmpFree(pszContent);
382	}
383	else
384	rc = VERR_NO_TMP_MEMORY;
385	}
386	else
387	{
388	LogRel(("visoOpen: VERR_VD_INVALID_SIZE - cbFile=%#RX64 cbMaxFile=%#RX64\n",
389	cbFile, (uint64_t)VISO_MAX_FILE_SIZE));
390	rc = VERR_VD_INVALID_SIZE;
391	}
392	}
393
394	vdIfIoIntFileClose(pThis->pIfIo, pStorage);
395	return rc;
396	}
397
398
399	/**
400	* @interface_method_impl{VDIMAGEBACKEND,pfnOpen}
401	*/
402	static DECLCALLBACK(int) visoOpen(const char *pszFilename, unsigned uOpenFlags, PVDINTERFACE pVDIfsDisk, PVDINTERFACE pVDIfsImage,
403	VDTYPE enmType, void **ppBackendData)
404	{
405	uint32_t const fOpenFlags = uOpenFlags;
406	LogFlowFunc(("pszFilename='%s' fOpenFlags=%#x pVDIfsDisk=%p pVDIfsImage=%p enmType=%u ppBackendData=%p\n",
407	pszFilename, fOpenFlags, pVDIfsDisk, pVDIfsImage, enmType, ppBackendData));
408
409	/*
410	* Validate input.
411	*/
412	AssertPtrReturn(ppBackendData, VERR_INVALID_POINTER);
413	*ppBackendData = NULL;
414
415	AssertPtrReturn(pszFilename, VERR_INVALID_POINTER);
416	AssertReturn(*pszFilename, VERR_INVALID_POINTER);
417
418	AssertReturn(!(fOpenFlags & ~VD_OPEN_FLAGS_MASK), VERR_INVALID_FLAGS);
419
420	PVDINTERFACEIOINT pIfIo = VDIfIoIntGet(pVDIfsImage);
421	AssertPtrReturn(pIfIo, VERR_INVALID_PARAMETER);
422
423	PVDINTERFACEERROR pIfError = VDIfErrorGet(pVDIfsDisk);
424
425	AssertReturn(enmType == VDTYPE_OPTICAL_DISC, VERR_NOT_SUPPORTED);
426
427	/*
428	* Allocate and initialize the backend image instance data.
429	*/
430	int rc;
431	size_t cbFilename = strlen(pszFilename) + 1;
432	PVISOIMAGE pThis = (PVISOIMAGE)RTMemAllocZ(RT_UOFFSETOF(VISOIMAGE, RegionList.aRegions[1]) + cbFilename * 2);
433	if (pThis)
434	{
435	pThis->hIsoFile = NIL_RTVFSFILE;
436	pThis->cbImage = 0;
437	pThis->fOpenFlags = fOpenFlags;
438	pThis->pIfIo = pIfIo;
439	pThis->pIfError = pIfError;
440
441	pThis->RegionList.fFlags = 0;
442	pThis->RegionList.cRegions = 1;
443	pThis->RegionList.aRegions[0].offRegion = 0;
444	pThis->RegionList.aRegions[0].cRegionBlocksOrBytes = 0;
445	pThis->RegionList.aRegions[0].cbBlock = 2048;
446	pThis->RegionList.aRegions[0].enmDataForm = VDREGIONDATAFORM_RAW;
447	pThis->RegionList.aRegions[0].enmMetadataForm = VDREGIONMETADATAFORM_NONE;
448	pThis->RegionList.aRegions[0].cbData = 2048;
449	pThis->RegionList.aRegions[0].cbMetadata = 0;
450
451	char pszDst = (char )&pThis->RegionList.aRegions[1];
452	memcpy(pszDst, pszFilename, cbFilename);
453	pThis->pszFilename = pszDst;
454	pszDst[cbFilename - 1] = '\0';
455	pszDst += cbFilename;
456
457	memcpy(pszDst, pszFilename, cbFilename);
458	pThis->pszCwd = pszDst;
459	pszDst[cbFilename - 1] = '\0';
460	RTPathStripFilename(pszDst);
461
462	/*
463	* Only go all the way if this isn't an info query. Re-mastering an ISO
464	* can potentially be a lot of work and we don't want to go thru with it
465	* just because the GUI wants to display the image size.
466	*/
467	if (!(fOpenFlags & VD_OPEN_FLAGS_INFO))
468	rc = visoOpenWorker(pThis);
469	else
470	rc = visoProbeWorker(pThis->pszFilename, pThis->pIfIo, &pThis->Uuid);
471	if (RT_SUCCESS(rc))
472	{
473	*ppBackendData = pThis;
474	LogFlowFunc(("returns VINF_SUCCESS (UUID=%RTuuid, pszFilename=%s)\n", &pThis->Uuid, pThis->pszFilename));
475	return VINF_SUCCESS;
476	}
477
478	RTMemFree(pThis);
479	}
480	else
481	rc = VERR_NO_MEMORY;
482	LogFlowFunc(("returns %Rrc\n", rc));
483	return rc;
484	}
485
486
487	/**
488	* @interface_method_impl{VDIMAGEBACKEND,pfnClose}
489	*/
490	static DECLCALLBACK(int) visoClose(void *pBackendData, bool fDelete)
491	{
492	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
493	LogFlowFunc(("pThis=%p fDelete=%RTbool\n", pThis, fDelete));
494
495	if (pThis)
496	{
497	if (fDelete)
498	vdIfIoIntFileDelete(pThis->pIfIo, pThis->pszFilename);
499
500	if (pThis->hIsoFile != NIL_RTVFSFILE)
501	{
502	RTVfsFileRelease(pThis->hIsoFile);
503	pThis->hIsoFile = NIL_RTVFSFILE;
504	}
505
506	RTMemFree(pThis);
507	}
508
509	LogFlowFunc(("returns VINF_SUCCESS\n"));
510	return VINF_SUCCESS;
511	}
512
513	/**
514	* @interface_method_impl{VDIMAGEBACKEND,pfnRead}
515	*/
516	static DECLCALLBACK(int) visoRead(void pBackendData, uint64_t uOffset, size_t cbToRead, PVDIOCTX pIoCtx, size_t pcbActuallyRead)
517	{
518	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
519	uint64_t off = uOffset;
520	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
521	AssertReturn(pThis->hIsoFile != NIL_RTVFSFILE, VERR_VD_NOT_OPENED);
522	LogFlowFunc(("pThis=%p off=%#RX64 cbToRead=%#zx pIoCtx=%p pcbActuallyRead=%p\n", pThis, off, cbToRead, pIoCtx, pcbActuallyRead));
523
524	/*
525	* Check request.
526	*/
527	AssertReturn( off < pThis->cbImage
528	\|\| (off == pThis->cbImage && cbToRead == 0), VERR_EOF);
529
530	uint64_t cbLeftInImage = pThis->cbImage - off;
531	if (cbToRead >= cbLeftInImage)
532	cbToRead = cbLeftInImage; /* ASSUMES the caller can deal with this, given the pcbActuallyRead parameter... */
533
534	/*
535	* Work the I/O context using vdIfIoIntIoCtxSegArrayCreate.
536	*/
537	int rc = VINF_SUCCESS;
538	size_t cbActuallyRead = 0;
539	while (cbToRead > 0)
540	{
541	RTSGSEG Seg;
542	unsigned cSegs = 1;
543	size_t cbThisRead = vdIfIoIntIoCtxSegArrayCreate(pThis->pIfIo, pIoCtx, &Seg, &cSegs, cbToRead);
544	AssertBreakStmt(cbThisRead != 0, rc = VERR_INTERNAL_ERROR_2);
545	Assert(cbThisRead == Seg.cbSeg);
546
547	rc = RTVfsFileReadAt(pThis->hIsoFile, off, Seg.pvSeg, cbThisRead, NULL);
548	AssertRCBreak(rc);
549
550	/* advance. */
551	cbActuallyRead += cbThisRead;
552	off += cbThisRead;
553	cbToRead -= cbThisRead;
554	}
555
556	*pcbActuallyRead = cbActuallyRead;
557	return rc;
558	}
559
560	/**
561	* @interface_method_impl{VDIMAGEBACKEND,pfnWrite}
562	*/
563	static DECLCALLBACK(int) visoWrite(void *pBackendData, uint64_t uOffset, size_t cbToWrite,
564	PVDIOCTX pIoCtx, size_t pcbWriteProcess, size_t pcbPreRead,
565	size_t *pcbPostRead, unsigned fWrite)
566	{
567	RT_NOREF(uOffset, cbToWrite, pIoCtx, pcbWriteProcess, pcbPreRead, pcbPostRead, fWrite);
568	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
569	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
570	AssertReturn(pThis->hIsoFile != NIL_RTVFSFILE, VERR_VD_NOT_OPENED);
571	LogFlowFunc(("pThis=%p off=%#RX64 pIoCtx=%p cbToWrite=%#zx pcbWriteProcess=%p pcbPreRead=%p pcbPostRead=%p -> VERR_VD_IMAGE_READ_ONLY\n",
572	pThis, uOffset, pIoCtx, cbToWrite, pcbWriteProcess, pcbPreRead, pcbPostRead));
573	return VERR_VD_IMAGE_READ_ONLY;
574	}
575
576	/**
577	* @interface_method_impl{VDIMAGEBACKEND,pfnFlush}
578	*/
579	static DECLCALLBACK(int) visoFlush(void *pBackendData, PVDIOCTX pIoCtx)
580	{
581	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
582	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
583	AssertReturn(pThis->hIsoFile != NIL_RTVFSFILE, VERR_VD_NOT_OPENED);
584	RT_NOREF(pIoCtx);
585	return VINF_SUCCESS;
586	}
587
588	/**
589	* @interface_method_impl{VDIMAGEBACKEND,pfnGetVersion}
590	*/
591	static DECLCALLBACK(unsigned) visoGetVersion(void *pBackendData)
592	{
593	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
594	AssertPtrReturn(pThis, 0);
595	LogFlowFunc(("pThis=%#p -> 1\n", pThis));
596	return 1;
597	}
598
599	/**
600	* @interface_method_impl{VDIMAGEBACKEND,pfnGetFileSize}
601	*/
602	static DECLCALLBACK(uint64_t) visoGetFileSize(void *pBackendData)
603	{
604	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
605	AssertPtrReturn(pThis, 0);
606	LogFlowFunc(("pThis=%p -> %RX64 (%s)\n", pThis, pThis->cbImage, pThis->hIsoFile == NIL_RTVFSFILE ? "fake!" : "real"));
607	return pThis->cbImage;
608	}
609
610	/**
611	* @interface_method_impl{VDIMAGEBACKEND,pfnGetPCHSGeometry}
612	*/
613	static DECLCALLBACK(int) visoGetPCHSGeometry(void *pBackendData, PVDGEOMETRY pPCHSGeometry)
614	{
615	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
616	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
617	LogFlowFunc(("pThis=%p pPCHSGeometry=%p -> VERR_NOT_SUPPORTED\n", pThis, pPCHSGeometry));
618	RT_NOREF(pPCHSGeometry);
619	return VERR_NOT_SUPPORTED;
620	}
621
622	/**
623	* @interface_method_impl{VDIMAGEBACKEND,pfnSetPCHSGeometry}
624	*/
625	static DECLCALLBACK(int) visoSetPCHSGeometry(void *pBackendData, PCVDGEOMETRY pPCHSGeometry)
626	{
627	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
628	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
629	LogFlowFunc(("pThis=%p pPCHSGeometry=%p:{%u/%u/%u} -> VERR_VD_IMAGE_READ_ONLY\n",
630	pThis, pPCHSGeometry, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
631	RT_NOREF(pPCHSGeometry);
632	return VERR_VD_IMAGE_READ_ONLY;
633	}
634
635	/**
636	* @interface_method_impl{VDIMAGEBACKEND,pfnGetLCHSGeometry}
637	*/
638	static DECLCALLBACK(int) visoGetLCHSGeometry(void *pBackendData, PVDGEOMETRY pLCHSGeometry)
639	{
640	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
641	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
642	LogFlowFunc(("pThis=%p pLCHSGeometry=%p -> VERR_NOT_SUPPORTED\n", pThis, pLCHSGeometry));
643	RT_NOREF(pLCHSGeometry);
644	return VERR_NOT_SUPPORTED;
645	}
646
647	/**
648	* @interface_method_impl{VDIMAGEBACKEND,pfnSetLCHSGeometry}
649	*/
650	static DECLCALLBACK(int) visoSetLCHSGeometry(void *pBackendData, PCVDGEOMETRY pLCHSGeometry)
651	{
652	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
653	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
654	LogFlowFunc(("pThis=%p pLCHSGeometry=%p:{%u/%u/%u} -> VERR_VD_IMAGE_READ_ONLY\n",
655	pThis, pLCHSGeometry, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
656	RT_NOREF(pLCHSGeometry);
657	return VERR_VD_IMAGE_READ_ONLY;
658	}
659
660	/**
661	* @interface_method_impl{VDIMAGEBACKEND,pfnQueryRegions}
662	*/
663	static DECLCALLBACK(int) visoQueryRegions(void pBackendData, PCVDREGIONLIST ppRegionList)
664	{
665	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
666	*ppRegionList = NULL;
667	AssertPtrReturn(pThis, VERR_VD_NOT_OPENED);
668
669	*ppRegionList = &pThis->RegionList;
670	LogFlowFunc(("returns VINF_SUCCESS (one region: 0 LB %RX64; pThis=%p)\n", pThis->RegionList.aRegions[0].cbData, pThis));
671	return VINF_SUCCESS;
672	}
673
674	/**
675	* @interface_method_impl{VDIMAGEBACKEND,pfnRegionListRelease}
676	*/
677	static DECLCALLBACK(void) visoRegionListRelease(void *pBackendData, PCVDREGIONLIST pRegionList)
678	{
679	/* Nothing to do here. Just assert the input to avoid unused parameter warnings. */
680	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
681	LogFlowFunc(("pThis=%p pRegionList=%p\n", pThis, pRegionList));
682	AssertPtrReturnVoid(pThis);
683	AssertReturnVoid(pRegionList == &pThis->RegionList \|\| pRegionList == 0);
684	}
685
686	/**
687	* @interface_method_impl{VDIMAGEBACKEND,pfnGetImageFlags}
688	*/
689	static DECLCALLBACK(unsigned) visoGetImageFlags(void *pBackendData)
690	{
691	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
692	LogFlowFunc(("pThis=%p -> VD_IMAGE_FLAGS_NONE\n", pThis));
693	AssertPtrReturn(pThis, VD_IMAGE_FLAGS_NONE);
694	return VD_IMAGE_FLAGS_NONE;
695	}
696
697	/**
698	* @interface_method_impl{VDIMAGEBACKEND,pfnGetOpenFlags}
699	*/
700	static DECLCALLBACK(unsigned) visoGetOpenFlags(void *pBackendData)
701	{
702	LogFlowFunc(("pBackendData=%#p\n", pBackendData));
703	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
704	AssertPtrReturn(pThis, 0);
705
706	LogFlowFunc(("returns %#x\n", pThis->fOpenFlags));
707	return pThis->fOpenFlags;
708	}
709
710	/**
711	* @interface_method_impl{VDIMAGEBACKEND,pfnSetOpenFlags}
712	*/
713	static DECLCALLBACK(int) visoSetOpenFlags(void *pBackendData, unsigned uOpenFlags)
714	{
715	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
716	LogFlowFunc(("pThis=%p fOpenFlags=%#x\n", pThis, uOpenFlags));
717
718	AssertPtrReturn(pThis, VERR_INVALID_POINTER);
719	uint32_t const fSupported = VD_OPEN_FLAGS_READONLY \| VD_OPEN_FLAGS_INFO
720	\| VD_OPEN_FLAGS_ASYNC_IO \| VD_OPEN_FLAGS_SHAREABLE
721	\| VD_OPEN_FLAGS_SEQUENTIAL \| VD_OPEN_FLAGS_SKIP_CONSISTENCY_CHECKS;
722	AssertMsgReturn(!(uOpenFlags & ~fSupported), ("fOpenFlags=%#x\n", uOpenFlags), VERR_INVALID_FLAGS);
723
724	/*
725	* Only react if we switch from VD_OPEN_FLAGS_INFO to non-VD_OPEN_FLAGS_INFO mode,
726	* becuase that means we need to open the image.
727	*/
728	if ( (pThis->fOpenFlags & VD_OPEN_FLAGS_INFO)
729	&& !(uOpenFlags & VD_OPEN_FLAGS_INFO)
730	&& pThis->hIsoFile == NIL_RTVFSFILE)
731	{
732	int rc = visoOpenWorker(pThis);
733	if (RT_FAILURE(rc))
734	{
735	LogFlowFunc(("returns %Rrc\n", rc));
736	return rc;
737	}
738	}
739
740	/*
741	* Update the flags.
742	*/
743	pThis->fOpenFlags &= ~fSupported;
744	pThis->fOpenFlags \|= fSupported & uOpenFlags;
745	pThis->fOpenFlags \|= VD_OPEN_FLAGS_READONLY;
746	if (pThis->hIsoFile != NIL_RTVFSFILE)
747	pThis->fOpenFlags &= ~VD_OPEN_FLAGS_INFO;
748
749	return VINF_SUCCESS;
750	}
751
752	#define uOpenFlags fOpenFlags /* sigh */
753
754	/**
755	* @interface_method_impl{VDIMAGEBACKEND,pfnGetComment}
756	*/
757	VD_BACKEND_CALLBACK_GET_COMMENT_DEF_NOT_SUPPORTED(visoGetComment);
758
759	/**
760	* @interface_method_impl{VDIMAGEBACKEND,pfnSetComment}
761	*/
762	VD_BACKEND_CALLBACK_SET_COMMENT_DEF_NOT_SUPPORTED(visoSetComment, PVISOIMAGE);
763
764	/**
765	* @interface_method_impl{VDIMAGEBACKEND,pfnGetUuid}
766	*/
767	static DECLCALLBACK(int) visoGetUuid(void *pBackendData, PRTUUID pUuid)
768	{
769	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
770	*pUuid = pThis->Uuid;
771	LogFlowFunc(("returns VIF_SUCCESS (%RTuuid)\n", pUuid));
772	return VINF_SUCCESS;
773	}
774
775	/**
776	* @interface_method_impl{VDIMAGEBACKEND,pfnSetUuid}
777	*/
778	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(visoSetUuid, PVISOIMAGE);
779
780	/**
781	* @interface_method_impl{VDIMAGEBACKEND,pfnGetModificationUuid}
782	*/
783	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(visoGetModificationUuid);
784
785	/**
786	* @interface_method_impl{VDIMAGEBACKEND,pfnSetModificationUuid}
787	*/
788	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(visoSetModificationUuid, PVISOIMAGE);
789
790	/**
791	* @interface_method_impl{VDIMAGEBACKEND,pfnGetParentUuid}
792	*/
793	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(visoGetParentUuid);
794
795	/**
796	* @interface_method_impl{VDIMAGEBACKEND,pfnSetParentUuid}
797	*/
798	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(visoSetParentUuid, PVISOIMAGE);
799
800	/**
801	* @interface_method_impl{VDIMAGEBACKEND,pfnGetParentModificationUuid}
802	*/
803	VD_BACKEND_CALLBACK_GET_UUID_DEF_NOT_SUPPORTED(visoGetParentModificationUuid);
804
805	/**
806	* @interface_method_impl{VDIMAGEBACKEND,pfnSetParentModificationUuid}
807	*/
808	VD_BACKEND_CALLBACK_SET_UUID_DEF_NOT_SUPPORTED(visoSetParentModificationUuid, PVISOIMAGE);
809
810	#undef uOpenFlags
811
812	/**
813	* @interface_method_impl{VDIMAGEBACKEND,pfnDump}
814	*/
815	static DECLCALLBACK(void) visoDump(void *pBackendData)
816	{
817	PVISOIMAGE pThis = (PVISOIMAGE)pBackendData;
818	AssertPtrReturnVoid(pThis);
819
820	vdIfErrorMessage(pThis->pIfError, "Dumping CUE image '%s' fOpenFlags=%x cbImage=%#RX64\n",
821	pThis->pszFilename, pThis->fOpenFlags, pThis->cbImage);
822	}
823
824
825
826	/**
827	* VBox ISO maker backend.
828	*/
829	const VDIMAGEBACKEND g_VBoxIsoMakerBackend =
830	{
831	/* u32Version */
832	VD_IMGBACKEND_VERSION,
833	/* pszBackendName */
834	"VBoxIsoMaker",
835	/* uBackendCaps */
836	VD_CAP_FILE,
837	/* paFileExtensions */
838	g_aVBoXIsoMakerFileExtensions,
839	/* paConfigInfo */
840	NULL,
841	/* pfnProbe */
842	visoProbe,
843	/* pfnOpen */
844	visoOpen,
845	/* pfnCreate */
846	NULL,
847	/* pfnRename */
848	NULL,
849	/* pfnClose */
850	visoClose,
851	/* pfnRead */
852	visoRead,
853	/* pfnWrite */
854	visoWrite,
855	/* pfnFlush */
856	visoFlush,
857	/* pfnDiscard */
858	NULL,
859	/* pfnGetVersion */
860	visoGetVersion,
861	/* pfnGetFileSize */
862	visoGetFileSize,
863	/* pfnGetPCHSGeometry */
864	visoGetPCHSGeometry,
865	/* pfnSetPCHSGeometry */
866	visoSetPCHSGeometry,
867	/* pfnGetLCHSGeometry */
868	visoGetLCHSGeometry,
869	/* pfnSetLCHSGeometry */
870	visoSetLCHSGeometry,
871	/* pfnQueryRegions */
872	visoQueryRegions,
873	/* pfnRegionListRelease */
874	visoRegionListRelease,
875	/* pfnGetImageFlags */
876	visoGetImageFlags,
877	/* pfnGetOpenFlags */
878	visoGetOpenFlags,
879	/* pfnSetOpenFlags */
880	visoSetOpenFlags,
881	/* pfnGetComment */
882	visoGetComment,
883	/* pfnSetComment */
884	visoSetComment,
885	/* pfnGetUuid */
886	visoGetUuid,
887	/* pfnSetUuid */
888	visoSetUuid,
889	/* pfnGetModificationUuid */
890	visoGetModificationUuid,
891	/* pfnSetModificationUuid */
892	visoSetModificationUuid,
893	/* pfnGetParentUuid */
894	visoGetParentUuid,
895	/* pfnSetParentUuid */
896	visoSetParentUuid,
897	/* pfnGetParentModificationUuid */
898	visoGetParentModificationUuid,
899	/* pfnSetParentModificationUuid */
900	visoSetParentModificationUuid,
901	/* pfnDump */
902	visoDump,
903	/* pfnGetTimestamp */
904	NULL,
905	/* pfnGetParentTimestamp */
906	NULL,
907	/* pfnSetParentTimestamp */
908	NULL,
909	/* pfnGetParentFilename */
910	NULL,
911	/* pfnSetParentFilename */
912	NULL,
913	/* pfnComposeLocation */
914	genericFileComposeLocation,
915	/* pfnComposeName */
916	genericFileComposeName,
917	/* pfnCompact */
918	NULL,
919	/* pfnResize */
920	NULL,
921	/* pfnRepair */
922	NULL,
923	/* pfnTraverseMetadata */
924	NULL,
925	/* u32VersionEnd */
926	VD_IMGBACKEND_VERSION
927	};
928

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source: vbox/trunk/src/VBox/Storage/VISO.cpp@ 76570

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