DrvBlock.cpp@ 8529

Last change on this file since 8529 was 8529, checked in by vboxsync, 16 years ago
Unlock media on VM reset.
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1	/** @file
2	*
3	* VBox storage devices:
4	* Generic block driver
5	*/
6
7	/*
8	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*
18	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
19	* Clara, CA 95054 USA or visit http://www.sun.com if you need
20	* additional information or have any questions.
21	*/
22
23
24	/*******************************************************************************
25	* Header Files *
26	*******************************************************************************/
27	#define LOG_GROUP LOG_GROUP_DRV_BLOCK
28	#include <VBox/pdmdrv.h>
29	#include <iprt/assert.h>
30	#include <iprt/uuid.h>
31
32	#include <string.h>
33
34	#include "Builtins.h"
35
36
37	/** @def VBOX_PERIODIC_FLUSH
38	* Enable support for periodically flushing the VDI to disk. This may prove
39	* useful for those nasty problems with the ultra-slow host filesystems.
40	* If this is enabled, it can be configured via the CFGM key
41	* "VBoxInternal/Devices/piix3ide/0/LUN#<x>/Config/FlushInterval". <x>
42	* must be replaced with the correct LUN number of the disk that should
43	* do the periodic flushes. The value of the key is the number of bytes
44	* written between flushes. A value of 0 (the default) denotes no flushes. */
45	#define VBOX_PERIODIC_FLUSH
46
47	/** @def VBOX_IGNORE_FLUSH
48	* Enable support for ignoring VDI flush requests. This can be useful for
49	* filesystems that show bad guest IDE write performance (especially with
50	* Windows guests). NOTE that this does not disable the flushes caused by
51	* the periodic flush cache feature above.
52	* If this feature is enabled, it can be configured via the CFGM key
53	* "VBoxInternal/Devices/piix3ide/0/LUN#<x>/Config/IgnoreFlush". <x>
54	* must be replaced with the correct LUN number of the disk that should
55	* ignore flush requests. The value of the key is a boolean. The default
56	* is to ignore flushes, i.e. true. */
57	#define VBOX_IGNORE_FLUSH
58
59	/*******************************************************************************
60	* Structures and Typedefs *
61	*******************************************************************************/
62	/**
63	* Block driver instance data.
64	*/
65	typedef struct DRVBLOCK
66	{
67	/** Pointer driver instance. */
68	PPDMDRVINS pDrvIns;
69	/** Drive type. */
70	PDMBLOCKTYPE enmType;
71	/** Locked indicator. */
72	bool fLocked;
73	/** Mountable indicator. */
74	bool fMountable;
75	/** Visible to the BIOS. */
76	bool fBiosVisible;
77	#ifdef VBOX_PERIODIC_FLUSH
78	/** HACK: Configuration value for number of bytes written after which to flush. */
79	uint32_t cbFlushInterval;
80	/** HACK: Current count for the number of bytes written since the last flush. */
81	uint32_t cbDataWritten;
82	#endif /* VBOX_PERIODIC_FLUSH */
83	#ifdef VBOX_IGNORE_FLUSH
84	/** HACK: Disable flushes for this drive. */
85	bool fIgnoreFlush;
86	#endif /* VBOX_IGNORE_FLUSH */
87	/** Pointer to the media driver below us.
88	* This is NULL if the media is not mounted. */
89	PPDMIMEDIA pDrvMedia;
90	/** Pointer to the block port interface above us. */
91	PPDMIBLOCKPORT pDrvBlockPort;
92	/** Pointer to the mount notify interface above us. */
93	PPDMIMOUNTNOTIFY pDrvMountNotify;
94	/** Our block interface. */
95	PDMIBLOCK IBlock;
96	/** Our block interface. */
97	PDMIBLOCKBIOS IBlockBios;
98	/** Our mountable interface. */
99	PDMIMOUNT IMount;
100
101	/** Pointer to the async media driver below us.
102	* This is NULL if the media is not mounted. */
103	PPDMIMEDIAASYNC pDrvMediaAsync;
104	/** Our media async port. */
105	PDMIMEDIAASYNCPORT IMediaAsyncPort;
106	/** Pointer to the async block port interface above us. */
107	PPDMIBLOCKASYNCPORT pDrvBlockAsyncPort;
108	/** Our async block interface. */
109	PDMIBLOCKASYNC IBlockAsync;
110
111	/** Uuid of the drive. */
112	RTUUID Uuid;
113
114	/** BIOS PCHS Geometry. */
115	PDMMEDIAGEOMETRY PCHSGeometry;
116	/** BIOS LCHS Geometry. */
117	PDMMEDIAGEOMETRY LCHSGeometry;
118	} DRVBLOCK, *PDRVBLOCK;
119
120
121	/* -=-=-=-=- IBlock -=-=-=-=- */
122
123	/** Makes a PDRVBLOCK out of a PPDMIBLOCK. */
124	#define PDMIBLOCK_2_DRVBLOCK(pInterface) ( (PDRVBLOCK)((uintptr_t)pInterface - RT_OFFSETOF(DRVBLOCK, IBlock)) )
125
126	/** @copydoc PDMIBLOCK::pfnRead */
127	static DECLCALLBACK(int) drvblockRead(PPDMIBLOCK pInterface, uint64_t off, void *pvBuf, size_t cbRead)
128	{
129	PDRVBLOCK pData = PDMIBLOCK_2_DRVBLOCK(pInterface);
130
131	/*
132	* Check the state.
133	*/
134	if (!pData->pDrvMedia)
135	{
136	AssertMsgFailed(("Invalid state! Not mounted!\n"));
137	return VERR_PDM_MEDIA_NOT_MOUNTED;
138	}
139
140	int rc = pData->pDrvMedia->pfnRead(pData->pDrvMedia, off, pvBuf, cbRead);
141	return rc;
142	}
143
144
145	/** @copydoc PDMIBLOCK::pfnWrite */
146	static DECLCALLBACK(int) drvblockWrite(PPDMIBLOCK pInterface, uint64_t off, const void *pvBuf, size_t cbWrite)
147	{
148	PDRVBLOCK pData = PDMIBLOCK_2_DRVBLOCK(pInterface);
149
150	/*
151	* Check the state.
152	*/
153	if (!pData->pDrvMedia)
154	{
155	AssertMsgFailed(("Invalid state! Not mounted!\n"));
156	return VERR_PDM_MEDIA_NOT_MOUNTED;
157	}
158
159	int rc = pData->pDrvMedia->pfnWrite(pData->pDrvMedia, off, pvBuf, cbWrite);
160	#ifdef VBOX_PERIODIC_FLUSH
161	if (pData->cbFlushInterval)
162	{
163	pData->cbDataWritten += cbWrite;
164	if (pData->cbDataWritten > pData->cbFlushInterval)
165	{
166	pData->cbDataWritten = 0;
167	pData->pDrvMedia->pfnFlush(pData->pDrvMedia);
168	}
169	}
170	#endif /* VBOX_PERIODIC_FLUSH */
171
172	return rc;
173	}
174
175
176	/** @copydoc PDMIBLOCK::pfnFlush */
177	static DECLCALLBACK(int) drvblockFlush(PPDMIBLOCK pInterface)
178	{
179	PDRVBLOCK pData = PDMIBLOCK_2_DRVBLOCK(pInterface);
180
181	/*
182	* Check the state.
183	*/
184	if (!pData->pDrvMedia)
185	{
186	AssertMsgFailed(("Invalid state! Not mounted!\n"));
187	return VERR_PDM_MEDIA_NOT_MOUNTED;
188	}
189
190	#ifdef VBOX_IGNORE_FLUSH
191	if (pData->fIgnoreFlush)
192	return VINF_SUCCESS;
193	#endif /* VBOX_IGNORE_FLUSH */
194
195	int rc = pData->pDrvMedia->pfnFlush(pData->pDrvMedia);
196	if (rc == VERR_NOT_IMPLEMENTED)
197	rc = VINF_SUCCESS;
198	return rc;
199	}
200
201
202	/** @copydoc PDMIBLOCK::pfnIsReadOnly */
203	static DECLCALLBACK(bool) drvblockIsReadOnly(PPDMIBLOCK pInterface)
204	{
205	PDRVBLOCK pData = PDMIBLOCK_2_DRVBLOCK(pInterface);
206
207	/*
208	* Check the state.
209	*/
210	if (!pData->pDrvMedia)
211	return false;
212
213	bool fRc = pData->pDrvMedia->pfnIsReadOnly(pData->pDrvMedia);
214	return fRc;
215	}
216
217
218	/** @copydoc PDMIBLOCK::pfnGetSize */
219	static DECLCALLBACK(uint64_t) drvblockGetSize(PPDMIBLOCK pInterface)
220	{
221	PDRVBLOCK pData = PDMIBLOCK_2_DRVBLOCK(pInterface);
222
223	/*
224	* Check the state.
225	*/
226	if (!pData->pDrvMedia)
227	return 0;
228
229	uint64_t cb = pData->pDrvMedia->pfnGetSize(pData->pDrvMedia);
230	LogFlow(("drvblockGetSize: returns %llu\n", cb));
231	return cb;
232	}
233
234
235	/** @copydoc PDMIBLOCK::pfnGetType */
236	static DECLCALLBACK(PDMBLOCKTYPE) drvblockGetType(PPDMIBLOCK pInterface)
237	{
238	PDRVBLOCK pData = PDMIBLOCK_2_DRVBLOCK(pInterface);
239	LogFlow(("drvblockGetType: returns %d\n", pData->enmType));
240	return pData->enmType;
241	}
242
243
244	/** @copydoc PDMIBLOCK::pfnGetUuid */
245	static DECLCALLBACK(int) drvblockGetUuid(PPDMIBLOCK pInterface, PRTUUID pUuid)
246	{
247	PDRVBLOCK pData = PDMIBLOCK_2_DRVBLOCK(pInterface);
248
249	/*
250	* Copy the uuid.
251	*/
252	*pUuid = pData->Uuid;
253	return VINF_SUCCESS;
254	}
255
256	/* -=-=-=-=- IBlockAsync -=-=-=-=- */
257
258	/** Makes a PDRVBLOCK out of a PPDMIBLOCKASYNC. */
259	#define PDMIBLOCKASYNC_2_DRVBLOCK(pInterface) ( (PDRVBLOCK)((uintptr_t)pInterface - RT_OFFSETOF(DRVBLOCK, IBlockAsync)) )
260
261	/** @copydoc PDMIBLOCKASYNC::pfnRead */
262	static DECLCALLBACK(int) drvblockAsyncReadStart(PPDMIBLOCKASYNC pInterface, uint64_t off, PPDMIDATATRANSPORTSEG pSeg, unsigned cSeg, size_t cbRead, void *pvUser)
263	{
264	PDRVBLOCK pData = PDMIBLOCKASYNC_2_DRVBLOCK(pInterface);
265
266	/*
267	* Check the state.
268	*/
269	if (!pData->pDrvMediaAsync)
270	{
271	AssertMsgFailed(("Invalid state! Not mounted!\n"));
272	return VERR_PDM_MEDIA_NOT_MOUNTED;
273	}
274
275	int rc = pData->pDrvMediaAsync->pfnStartRead(pData->pDrvMediaAsync, off, pSeg, cSeg, cbRead, pvUser);
276	return rc;
277	}
278
279
280	/** @copydoc PDMIBLOCKASYNC::pfnWrite */
281	static DECLCALLBACK(int) drvblockAsyncWriteStart(PPDMIBLOCKASYNC pInterface, uint64_t off, PPDMIDATATRANSPORTSEG pSeg, unsigned cSeg, size_t cbWrite, void *pvUser)
282	{
283	PDRVBLOCK pData = PDMIBLOCKASYNC_2_DRVBLOCK(pInterface);
284
285	/*
286	* Check the state.
287	*/
288	if (!pData->pDrvMediaAsync)
289	{
290	AssertMsgFailed(("Invalid state! Not mounted!\n"));
291	return VERR_PDM_MEDIA_NOT_MOUNTED;
292	}
293
294	int rc = pData->pDrvMediaAsync->pfnStartWrite(pData->pDrvMediaAsync, off, pSeg, cSeg, cbWrite, pvUser);
295
296	return rc;
297	}
298
299	/* -=-=-=-=- IMediaAsyncPort -=-=-=-=- */
300
301	/** Makes a PDRVBLOCKASYNC out of a PPDMIMEDIAASYNCPORT. */
302	#define PDMIMEDIAASYNCPORT_2_DRVBLOCK(pInterface) ( (PDRVBLOCK((uintptr_t)pInterface - RT_OFFSETOF(DRVBLOCK, IMediaAsyncPort))) )
303
304
305	static DECLCALLBACK(int) drvblockAsyncReadCompleteNotify(PPDMIMEDIAASYNCPORT pInterface, uint64_t uOffset, PPDMIDATATRANSPORTSEG pSeg, unsigned cSeg, size_t cbRead, void *pvUser)
306	{
307	PDRVBLOCK pData = PDMIMEDIAASYNCPORT_2_DRVBLOCK(pInterface);
308
309	return pData->pDrvBlockAsyncPort->pfnReadCompleteNotify(pData->pDrvBlockAsyncPort, uOffset, pSeg, cSeg, cbRead, pvUser);
310	}
311
312	static DECLCALLBACK(int) drvblockAsyncWriteCompleteNotify(PPDMIMEDIAASYNCPORT pInterface, uint64_t uOffset, PPDMIDATATRANSPORTSEG pSeg, unsigned cSeg, size_t cbWritten, void *pvUser)
313	{
314	PDRVBLOCK pData = PDMIMEDIAASYNCPORT_2_DRVBLOCK(pInterface);
315
316	#ifdef VBOX_PERIODIC_FLUSH
317	if (pData->cbFlushInterval)
318	{
319	pData->cbDataWritten += cbWritten;
320	if (pData->cbDataWritten > pData->cbFlushInterval)
321	{
322	pData->cbDataWritten = 0;
323	pData->pDrvMedia->pfnFlush(pData->pDrvMedia);
324	}
325	}
326	#endif /* VBOX_PERIODIC_FLUSH */
327
328	return pData->pDrvBlockAsyncPort->pfnWriteCompleteNotify(pData->pDrvBlockAsyncPort, uOffset, pSeg, cSeg, cbWritten, pvUser);
329	}
330
331	/* -=-=-=-=- IBlockBios -=-=-=-=- */
332
333	/** Makes a PDRVBLOCK out of a PPDMIBLOCKBIOS. */
334	#define PDMIBLOCKBIOS_2_DRVBLOCK(pInterface) ( (PDRVBLOCK((uintptr_t)pInterface - RT_OFFSETOF(DRVBLOCK, IBlockBios))) )
335
336
337	/** @copydoc PDMIBLOCKBIOS::pfnGetPCHSGeometry */
338	static DECLCALLBACK(int) drvblockGetPCHSGeometry(PPDMIBLOCKBIOS pInterface, PPDMMEDIAGEOMETRY pPCHSGeometry)
339	{
340	PDRVBLOCK pData = PDMIBLOCKBIOS_2_DRVBLOCK(pInterface);
341
342	/*
343	* Check the state.
344	*/
345	if (!pData->pDrvMedia)
346	return VERR_PDM_MEDIA_NOT_MOUNTED;
347
348	/*
349	* Use configured/cached values if present.
350	*/
351	if ( pData->PCHSGeometry.cCylinders > 0
352	&& pData->PCHSGeometry.cHeads > 0
353	&& pData->PCHSGeometry.cSectors > 0)
354	{
355	*pPCHSGeometry = pData->PCHSGeometry;
356	LogFlow(("%s: returns VINF_SUCCESS {%d,%d,%d}\n", __FUNCTION__, pData->PCHSGeometry.cCylinders, pData->PCHSGeometry.cHeads, pData->PCHSGeometry.cSectors));
357	return VINF_SUCCESS;
358	}
359
360	/*
361	* Call media.
362	*/
363	int rc = pData->pDrvMedia->pfnBiosGetPCHSGeometry(pData->pDrvMedia, &pData->PCHSGeometry);
364
365	if (VBOX_SUCCESS(rc))
366	{
367	*pPCHSGeometry = pData->PCHSGeometry;
368	LogFlow(("%s: returns %Vrc {%d,%d,%d}\n", __FUNCTION__, rc, pData->PCHSGeometry.cCylinders, pData->PCHSGeometry.cHeads, pData->PCHSGeometry.cSectors));
369	}
370	else if (rc == VERR_NOT_IMPLEMENTED)
371	{
372	rc = VERR_PDM_GEOMETRY_NOT_SET;
373	LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc));
374	}
375	return rc;
376	}
377
378
379	/** @copydoc PDMIBLOCKBIOS::pfnSetPCHSGeometry */
380	static DECLCALLBACK(int) drvblockSetPCHSGeometry(PPDMIBLOCKBIOS pInterface, PCPDMMEDIAGEOMETRY pPCHSGeometry)
381	{
382	LogFlow(("%s: cCylinders=%d cHeads=%d cSectors=%d\n", __FUNCTION__, pPCHSGeometry->cCylinders, pPCHSGeometry->cHeads, pPCHSGeometry->cSectors));
383	PDRVBLOCK pData = PDMIBLOCKBIOS_2_DRVBLOCK(pInterface);
384
385	/*
386	* Check the state.
387	*/
388	if (!pData->pDrvMedia)
389	{
390	AssertMsgFailed(("Invalid state! Not mounted!\n"));
391	return VERR_PDM_MEDIA_NOT_MOUNTED;
392	}
393
394	/*
395	* Call media. Ignore the not implemented return code.
396	*/
397	int rc = pData->pDrvMedia->pfnBiosSetPCHSGeometry(pData->pDrvMedia, pPCHSGeometry);
398
399	if ( VBOX_SUCCESS(rc)
400	\|\| rc == VERR_NOT_IMPLEMENTED)
401	{
402	pData->PCHSGeometry = *pPCHSGeometry;
403	rc = VINF_SUCCESS;
404	}
405	return rc;
406	}
407
408
409	/** @copydoc PDMIBLOCKBIOS::pfnGetLCHSGeometry */
410	static DECLCALLBACK(int) drvblockGetLCHSGeometry(PPDMIBLOCKBIOS pInterface, PPDMMEDIAGEOMETRY pLCHSGeometry)
411	{
412	PDRVBLOCK pData = PDMIBLOCKBIOS_2_DRVBLOCK(pInterface);
413
414	/*
415	* Check the state.
416	*/
417	if (!pData->pDrvMedia)
418	return VERR_PDM_MEDIA_NOT_MOUNTED;
419
420	/*
421	* Use configured/cached values if present.
422	*/
423	if ( pData->LCHSGeometry.cCylinders > 0
424	&& pData->LCHSGeometry.cHeads > 0
425	&& pData->LCHSGeometry.cSectors > 0)
426	{
427	*pLCHSGeometry = pData->LCHSGeometry;
428	LogFlow(("%s: returns VINF_SUCCESS {%d,%d,%d}\n", __FUNCTION__, pData->LCHSGeometry.cCylinders, pData->LCHSGeometry.cHeads, pData->LCHSGeometry.cSectors));
429	return VINF_SUCCESS;
430	}
431
432	/*
433	* Call media.
434	*/
435	int rc = pData->pDrvMedia->pfnBiosGetLCHSGeometry(pData->pDrvMedia, &pData->LCHSGeometry);
436
437	if (VBOX_SUCCESS(rc))
438	{
439	*pLCHSGeometry = pData->LCHSGeometry;
440	LogFlow(("%s: returns %Vrc {%d,%d,%d}\n", __FUNCTION__, rc, pData->LCHSGeometry.cCylinders, pData->LCHSGeometry.cHeads, pData->LCHSGeometry.cSectors));
441	}
442	else if (rc == VERR_NOT_IMPLEMENTED)
443	{
444	rc = VERR_PDM_GEOMETRY_NOT_SET;
445	LogFlow(("%s: returns %Vrc\n", __FUNCTION__, rc));
446	}
447	return rc;
448	}
449
450
451	/** @copydoc PDMIBLOCKBIOS::pfnSetLCHSGeometry */
452	static DECLCALLBACK(int) drvblockSetLCHSGeometry(PPDMIBLOCKBIOS pInterface, PCPDMMEDIAGEOMETRY pLCHSGeometry)
453	{
454	LogFlow(("%s: cCylinders=%d cHeads=%d cSectors=%d\n", __FUNCTION__, pLCHSGeometry->cCylinders, pLCHSGeometry->cHeads, pLCHSGeometry->cSectors));
455	PDRVBLOCK pData = PDMIBLOCKBIOS_2_DRVBLOCK(pInterface);
456
457	/*
458	* Check the state.
459	*/
460	if (!pData->pDrvMedia)
461	{
462	AssertMsgFailed(("Invalid state! Not mounted!\n"));
463	return VERR_PDM_MEDIA_NOT_MOUNTED;
464	}
465
466	/*
467	* Call media. Ignore the not implemented return code.
468	*/
469	int rc = pData->pDrvMedia->pfnBiosSetLCHSGeometry(pData->pDrvMedia, pLCHSGeometry);
470
471	if ( VBOX_SUCCESS(rc)
472	\|\| rc == VERR_NOT_IMPLEMENTED)
473	{
474	pData->LCHSGeometry = *pLCHSGeometry;
475	rc = VINF_SUCCESS;
476	}
477	return rc;
478	}
479
480
481	/** @copydoc PDMIBLOCKBIOS::pfnIsVisible */
482	static DECLCALLBACK(bool) drvblockIsVisible(PPDMIBLOCKBIOS pInterface)
483	{
484	PDRVBLOCK pData = PDMIBLOCKBIOS_2_DRVBLOCK(pInterface);
485	LogFlow(("drvblockIsVisible: returns %d\n", pData->fBiosVisible));
486	return pData->fBiosVisible;
487	}
488
489
490	/** @copydoc PDMIBLOCKBIOS::pfnGetType */
491	static DECLCALLBACK(PDMBLOCKTYPE) drvblockBiosGetType(PPDMIBLOCKBIOS pInterface)
492	{
493	PDRVBLOCK pData = PDMIBLOCKBIOS_2_DRVBLOCK(pInterface);
494	LogFlow(("drvblockBiosGetType: returns %d\n", pData->enmType));
495	return pData->enmType;
496	}
497
498
499
500	/* -=-=-=-=- IMount -=-=-=-=- */
501
502	/** Makes a PDRVBLOCK out of a PPDMIMOUNT. */
503	#define PDMIMOUNT_2_DRVBLOCK(pInterface) ( (PDRVBLOCK)((uintptr_t)pInterface - RT_OFFSETOF(DRVBLOCK, IMount)) )
504
505
506	/** @copydoc PDMIMOUNT::pfnMount */
507	static DECLCALLBACK(int) drvblockMount(PPDMIMOUNT pInterface, const char pszFilename, const char pszCoreDriver)
508	{
509	LogFlow(("drvblockMount: pszFilename=%p:{%s} pszCoreDriver=%p:{%s}\n", pszFilename, pszFilename, pszCoreDriver, pszCoreDriver));
510	PDRVBLOCK pData = PDMIMOUNT_2_DRVBLOCK(pInterface);
511
512	/*
513	* Validate state.
514	*/
515	if (pData->pDrvMedia)
516	{
517	AssertMsgFailed(("Already mounted\n"));
518	return VERR_PDM_MEDIA_MOUNTED;
519	}
520
521	/*
522	* Prepare configuration.
523	*/
524	if (pszFilename)
525	{
526	int rc = pData->pDrvIns->pDrvHlp->pfnMountPrepare(pData->pDrvIns, pszFilename, pszCoreDriver);
527	if (VBOX_FAILURE(rc))
528	{
529	Log(("drvblockMount: Prepare failed for \"%s\" rc=%Vrc\n", pszFilename, rc));
530	return rc;
531	}
532	}
533
534	/*
535	* Attach the media driver and query it's interface.
536	*/
537	PPDMIBASE pBase;
538	int rc = pData->pDrvIns->pDrvHlp->pfnAttach(pData->pDrvIns, &pBase);
539	if (VBOX_FAILURE(rc))
540	{
541	Log(("drvblockMount: Attach failed rc=%Vrc\n", rc));
542	return rc;
543	}
544
545	pData->pDrvMedia = (PPDMIMEDIA)pBase->pfnQueryInterface(pBase, PDMINTERFACE_MEDIA);
546	if (pData->pDrvMedia)
547	{
548	/*
549	* Initialize state.
550	*/
551	pData->fLocked = false;
552	pData->PCHSGeometry.cCylinders = 0;
553	pData->PCHSGeometry.cHeads = 0;
554	pData->PCHSGeometry.cSectors = 0;
555	pData->LCHSGeometry.cCylinders = 0;
556	pData->LCHSGeometry.cHeads = 0;
557	pData->LCHSGeometry.cSectors = 0;
558	#ifdef VBOX_PERIODIC_FLUSH
559	pData->cbDataWritten = 0;
560	#endif /* VBOX_PERIODIC_FLUSH */
561
562	/*
563	* Notify driver/device above us.
564	*/
565	if (pData->pDrvMountNotify)
566	pData->pDrvMountNotify->pfnMountNotify(pData->pDrvMountNotify);
567	Log(("drvblockMount: Success\n"));
568	return VINF_SUCCESS;
569	}
570	else
571	rc = VERR_PDM_MISSING_INTERFACE_BELOW;
572
573	/*
574	* Failed, detatch the media driver.
575	*/
576	AssertMsgFailed(("No media interface!\n"));
577	int rc2 = pData->pDrvIns->pDrvHlp->pfnDetach(pData->pDrvIns);
578	AssertRC(rc2);
579	pData->pDrvMedia = NULL;
580	return rc;
581	}
582
583
584	/** @copydoc PDMIMOUNT::pfnUnmount */
585	static DECLCALLBACK(int) drvblockUnmount(PPDMIMOUNT pInterface, bool fForce)
586	{
587	PDRVBLOCK pData = PDMIMOUNT_2_DRVBLOCK(pInterface);
588
589	/*
590	* Validate state.
591	*/
592	if (!pData->pDrvMedia)
593	{
594	Log(("drvblockUmount: Not mounted\n"));
595	return VERR_PDM_MEDIA_NOT_MOUNTED;
596	}
597	if (pData->fLocked && !fForce)
598	{
599	Log(("drvblockUmount: Locked\n"));
600	return VERR_PDM_MEDIA_LOCKED;
601	}
602
603	/* Media is no longer locked even if it was previously. */
604	pData->fLocked = false;
605
606	/*
607	* Detach the media driver and query it's interface.
608	*/
609	int rc = pData->pDrvIns->pDrvHlp->pfnDetach(pData->pDrvIns);
610	if (VBOX_FAILURE(rc))
611	{
612	Log(("drvblockUnmount: Detach failed rc=%Vrc\n", rc));
613	return rc;
614	}
615	Assert(!pData->pDrvMedia);
616
617	/*
618	* Notify driver/device above us.
619	*/
620	if (pData->pDrvMountNotify)
621	pData->pDrvMountNotify->pfnUnmountNotify(pData->pDrvMountNotify);
622	Log(("drvblockUnmount: success\n"));
623	return VINF_SUCCESS;
624	}
625
626
627	/** @copydoc PDMIMOUNT::pfnIsMounted */
628	static DECLCALLBACK(bool) drvblockIsMounted(PPDMIMOUNT pInterface)
629	{
630	PDRVBLOCK pData = PDMIMOUNT_2_DRVBLOCK(pInterface);
631	return pData->pDrvMedia != NULL;
632	}
633
634	/** @copydoc PDMIMOUNT::pfnLock */
635	static DECLCALLBACK(int) drvblockLock(PPDMIMOUNT pInterface)
636	{
637	PDRVBLOCK pData = PDMIMOUNT_2_DRVBLOCK(pInterface);
638	Log(("drvblockLock: %d -> %d\n", pData->fLocked, true));
639	pData->fLocked = true;
640	return VINF_SUCCESS;
641	}
642
643	/** @copydoc PDMIMOUNT::pfnUnlock */
644	static DECLCALLBACK(int) drvblockUnlock(PPDMIMOUNT pInterface)
645	{
646	PDRVBLOCK pData = PDMIMOUNT_2_DRVBLOCK(pInterface);
647	Log(("drvblockUnlock: %d -> %d\n", pData->fLocked, false));
648	pData->fLocked = false;
649	return VINF_SUCCESS;
650	}
651
652	/** @copydoc PDMIMOUNT::pfnIsLocked */
653	static DECLCALLBACK(bool) drvblockIsLocked(PPDMIMOUNT pInterface)
654	{
655	PDRVBLOCK pData = PDMIMOUNT_2_DRVBLOCK(pInterface);
656	return pData->fLocked;
657	}
658
659
660	/* -=-=-=-=- IBase -=-=-=-=- */
661
662	/** @copydoc PDMIBASE::pfnQueryInterface. */
663	static DECLCALLBACK(void *) drvblockQueryInterface(PPDMIBASE pInterface, PDMINTERFACE enmInterface)
664	{
665	PPDMDRVINS pDrvIns = PDMIBASE_2_PDMDRV(pInterface);
666	PDRVBLOCK pData = PDMINS2DATA(pDrvIns, PDRVBLOCK);
667	switch (enmInterface)
668	{
669	case PDMINTERFACE_BASE:
670	return &pDrvIns->IBase;
671	case PDMINTERFACE_BLOCK:
672	return &pData->IBlock;
673	case PDMINTERFACE_BLOCK_BIOS:
674	return pData->fBiosVisible ? &pData->IBlockBios : NULL;
675	case PDMINTERFACE_MOUNT:
676	return pData->fMountable ? &pData->IMount : NULL;
677	case PDMINTERFACE_BLOCK_ASYNC:
678	return pData->pDrvMediaAsync ? &pData->IBlockAsync : NULL;
679	case PDMINTERFACE_MEDIA_ASYNC_PORT:
680	return &pData->IMediaAsyncPort;
681	default:
682	return NULL;
683	}
684	}
685
686
687	/* -=-=-=-=- driver interface -=-=-=-=- */
688
689	/** @copydoc FNPDMDRVDETACH. */
690	static DECLCALLBACK(void) drvblockDetach(PPDMDRVINS pDrvIns)
691	{
692	PDRVBLOCK pData = PDMINS2DATA(pDrvIns, PDRVBLOCK);
693	pData->pDrvMedia = NULL;
694	pData->pDrvMediaAsync = NULL;
695	}
696
697	/**
698	* Reset notification.
699	*
700	* @returns VBox status.
701	* @param pDevIns The driver instance data.
702	*/
703	static DECLCALLBACK(void) drvblockReset(PPDMDRVINS pDrvIns)
704	{
705	PDRVBLOCK pData = PDMINS2DATA(pDrvIns, PDRVBLOCK);
706
707	pData->fLocked = false;
708	}
709
710	/**
711	* Construct a block driver instance.
712	*
713	* @returns VBox status.
714	* @param pDrvIns The driver instance data.
715	* If the registration structure is needed, pDrvIns->pDrvReg points to it.
716	* @param pCfgHandle Configuration node handle for the driver. Use this to obtain the configuration
717	* of the driver instance. It's also found in pDrvIns->pCfgHandle, but like
718	* iInstance it's expected to be used a bit in this function.
719	*/
720	static DECLCALLBACK(int) drvblockConstruct(PPDMDRVINS pDrvIns, PCFGMNODE pCfgHandle)
721	{
722	PDRVBLOCK pData = PDMINS2DATA(pDrvIns, PDRVBLOCK);
723	LogFlow(("drvblockConstruct: iInstance=%d\n", pDrvIns->iInstance));
724
725	/*
726	* Validate configuration.
727	*/
728	#if defined(VBOX_PERIODIC_FLUSH) \|\| defined(VBOX_IGNORE_FLUSH)
729	if (!CFGMR3AreValuesValid(pCfgHandle, "Type\0Locked\0BIOSVisible\0AttachFailError\0Cylinders\0Heads\0Sectors\0Mountable\0FlushInterval\0IgnoreFlush\0"))
730	#else /* !(VBOX_PERIODIC_FLUSH \|\| VBOX_IGNORE_FLUSH) */
731	if (!CFGMR3AreValuesValid(pCfgHandle, "Type\0Locked\0BIOSVisible\0AttachFailError\0Cylinders\0Heads\0Sectors\0Mountable\0"))
732	#endif /* !(VBOX_PERIODIC_FLUSH \|\| VBOX_IGNORE_FLUSH) */
733	return VERR_PDM_DRVINS_UNKNOWN_CFG_VALUES;
734
735	/*
736	* Initialize most of the data members.
737	*/
738	pData->pDrvIns = pDrvIns;
739
740	/* IBase. */
741	pDrvIns->IBase.pfnQueryInterface = drvblockQueryInterface;
742
743	/* IBlock. */
744	pData->IBlock.pfnRead = drvblockRead;
745	pData->IBlock.pfnWrite = drvblockWrite;
746	pData->IBlock.pfnFlush = drvblockFlush;
747	pData->IBlock.pfnIsReadOnly = drvblockIsReadOnly;
748	pData->IBlock.pfnGetSize = drvblockGetSize;
749	pData->IBlock.pfnGetType = drvblockGetType;
750	pData->IBlock.pfnGetUuid = drvblockGetUuid;
751
752	/* IBlockBios. */
753	pData->IBlockBios.pfnGetPCHSGeometry = drvblockGetPCHSGeometry;
754	pData->IBlockBios.pfnSetPCHSGeometry = drvblockSetPCHSGeometry;
755	pData->IBlockBios.pfnGetLCHSGeometry = drvblockGetLCHSGeometry;
756	pData->IBlockBios.pfnSetLCHSGeometry = drvblockSetLCHSGeometry;
757	pData->IBlockBios.pfnIsVisible = drvblockIsVisible;
758	pData->IBlockBios.pfnGetType = drvblockBiosGetType;
759
760	/* IMount. */
761	pData->IMount.pfnMount = drvblockMount;
762	pData->IMount.pfnUnmount = drvblockUnmount;
763	pData->IMount.pfnIsMounted = drvblockIsMounted;
764	pData->IMount.pfnLock = drvblockLock;
765	pData->IMount.pfnUnlock = drvblockUnlock;
766	pData->IMount.pfnIsLocked = drvblockIsLocked;
767
768	/* IBlockAsync. */
769	pData->IBlockAsync.pfnStartRead = drvblockAsyncReadStart;
770	pData->IBlockAsync.pfnStartWrite = drvblockAsyncWriteStart;
771
772	/* IMediaAsyncPort. */
773	pData->IMediaAsyncPort.pfnReadCompleteNotify = drvblockAsyncReadCompleteNotify;
774	pData->IMediaAsyncPort.pfnWriteCompleteNotify = drvblockAsyncWriteCompleteNotify;
775
776	/*
777	* Get the IBlockPort & IMountNotify interfaces of the above driver/device.
778	*/
779	pData->pDrvBlockPort = (PPDMIBLOCKPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase, PDMINTERFACE_BLOCK_PORT);
780	if (!pData->pDrvBlockPort)
781	{
782	AssertMsgFailed(("Configuration error: No block port interface above!\n"));
783	return VERR_PDM_MISSING_INTERFACE_ABOVE;
784	}
785
786	/* Try to get the optional async block port interface above. */
787	pData->pDrvBlockAsyncPort = (PPDMIBLOCKASYNCPORT)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase, PDMINTERFACE_BLOCK_ASYNC_PORT);
788
789	pData->pDrvMountNotify = (PPDMIMOUNTNOTIFY)pDrvIns->pUpBase->pfnQueryInterface(pDrvIns->pUpBase, PDMINTERFACE_MOUNT_NOTIFY);
790
791	/*
792	* Query configuration.
793	*/
794	/* type */
795	char *psz;
796	int rc = CFGMR3QueryStringAlloc(pCfgHandle, "Type", &psz);
797	if (VBOX_FAILURE(rc))
798	{
799	AssertMsgFailed(("Configuration error: Failed to obtain the type, rc=%Vrc.\n", rc));
800	return VERR_PDM_BLOCK_NO_TYPE;
801	}
802	if (!strcmp(psz, "HardDisk"))
803	pData->enmType = PDMBLOCKTYPE_HARD_DISK;
804	else if (!strcmp(psz, "DVD"))
805	pData->enmType = PDMBLOCKTYPE_DVD;
806	else if (!strcmp(psz, "CDROM"))
807	pData->enmType = PDMBLOCKTYPE_CDROM;
808	else if (!strcmp(psz, "Floppy 2.88"))
809	pData->enmType = PDMBLOCKTYPE_FLOPPY_2_88;
810	else if (!strcmp(psz, "Floppy 1.44"))
811	pData->enmType = PDMBLOCKTYPE_FLOPPY_1_44;
812	else if (!strcmp(psz, "Floppy 1.20"))
813	pData->enmType = PDMBLOCKTYPE_FLOPPY_1_20;
814	else if (!strcmp(psz, "Floppy 720"))
815	pData->enmType = PDMBLOCKTYPE_FLOPPY_720;
816	else if (!strcmp(psz, "Floppy 360"))
817	pData->enmType = PDMBLOCKTYPE_FLOPPY_360;
818	else
819	{
820	AssertMsgFailed(("Configuration error: Unknown type \"%s\".\n", psz));
821	MMR3HeapFree(psz);
822	return VERR_PDM_BLOCK_UNKNOWN_TYPE;
823	}
824	Log2(("drvblockConstruct: enmType=%d\n", pData->enmType));
825	MMR3HeapFree(psz); psz = NULL;
826
827	/* Mountable */
828	rc = CFGMR3QueryBool(pCfgHandle, "Mountable", &pData->fMountable);
829	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
830	pData->fMountable = false;
831	else if (VBOX_FAILURE(rc))
832	{
833	AssertMsgFailed(("Configuration error: Query \"Mountable\" resulted in %Vrc.\n", rc));
834	return rc;
835	}
836
837	/* Locked */
838	rc = CFGMR3QueryBool(pCfgHandle, "Locked", &pData->fLocked);
839	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
840	pData->fLocked = false;
841	else if (VBOX_FAILURE(rc))
842	{
843	AssertMsgFailed(("Configuration error: Query \"Locked\" resulted in %Vrc.\n", rc));
844	return rc;
845	}
846
847	/* BIOS visible */
848	rc = CFGMR3QueryBool(pCfgHandle, "BIOSVisible", &pData->fBiosVisible);
849	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
850	pData->fBiosVisible = true;
851	else if (VBOX_FAILURE(rc))
852	{
853	AssertMsgFailed(("Configuration error: Query \"BIOSVisible\" resulted in %Vrc.\n", rc));
854	return rc;
855	}
856
857	/** @todo AttachFailError is currently completely ignored. */
858
859	/* Cylinders */
860	rc = CFGMR3QueryU32(pCfgHandle, "Cylinders", &pData->LCHSGeometry.cCylinders);
861	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
862	pData->LCHSGeometry.cCylinders = 0;
863	else if (VBOX_FAILURE(rc))
864	{
865	AssertMsgFailed(("Configuration error: Query \"Cylinders\" resulted in %Vrc.\n", rc));
866	return rc;
867	}
868
869	/* Heads */
870	rc = CFGMR3QueryU32(pCfgHandle, "Heads", &pData->LCHSGeometry.cHeads);
871	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
872	pData->LCHSGeometry.cHeads = 0;
873	else if (VBOX_FAILURE(rc))
874	{
875	AssertMsgFailed(("Configuration error: Query \"Heads\" resulted in %Vrc.\n", rc));
876	return rc;
877	}
878
879	/* Sectors */
880	rc = CFGMR3QueryU32(pCfgHandle, "Sectors", &pData->LCHSGeometry.cSectors);
881	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
882	pData->LCHSGeometry.cSectors = 0;
883	else if (VBOX_FAILURE(rc))
884	{
885	AssertMsgFailed(("Configuration error: Query \"Sectors\" resulted in %Vrc.\n", rc));
886	return rc;
887	}
888
889	/* Uuid */
890	rc = CFGMR3QueryStringAlloc(pCfgHandle, "Uuid", &psz);
891	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
892	RTUuidClear(&pData->Uuid);
893	else if (VBOX_SUCCESS(rc))
894	{
895	rc = RTUuidFromStr(&pData->Uuid, psz);
896	if (VBOX_FAILURE(rc))
897	{
898	AssertMsgFailed(("Configuration error: Uuid from string failed on \"%s\", rc=%Vrc.\n", psz, rc));
899	MMR3HeapFree(psz);
900	return rc;
901	}
902	MMR3HeapFree(psz); psz = NULL;
903	}
904	else
905	{
906	AssertMsgFailed(("Configuration error: Failed to obtain the type, rc=%Vrc.\n", rc));
907	return VERR_PDM_BLOCK_NO_TYPE;
908	}
909
910	#ifdef VBOX_PERIODIC_FLUSH
911	rc = CFGMR3QueryU32(pCfgHandle, "FlushInterval", &pData->cbFlushInterval);
912	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
913	pData->cbFlushInterval = 0;
914	else if (VBOX_FAILURE(rc))
915	{
916	AssertMsgFailed(("Configuration error: Query \"FlushInterval\" resulted in %Vrc.\n", rc));
917	return rc;
918	}
919	#endif /* VBOX_PERIODIC_FLUSH */
920
921	#ifdef VBOX_IGNORE_FLUSH
922	rc = CFGMR3QueryBool(pCfgHandle, "IgnoreFlush", &pData->fIgnoreFlush);
923	if (rc == VERR_CFGM_VALUE_NOT_FOUND)
924	pData->fIgnoreFlush = true; /* The default is to ignore flushes. */
925	else if (VBOX_FAILURE(rc))
926	{
927	AssertMsgFailed(("Configuration error: Query \"IgnoreFlush\" resulted in %Vrc.\n", rc));
928	return rc;
929	}
930	#endif /* VBOX_IGNORE_FLUSH */
931
932	/*
933	* Try attach driver below and query it's media interface.
934	*/
935	PPDMIBASE pBase;
936	rc = pDrvIns->pDrvHlp->pfnAttach(pDrvIns, &pBase);
937	if ( rc == VERR_PDM_NO_ATTACHED_DRIVER
938	&& pData->enmType != PDMBLOCKTYPE_HARD_DISK)
939	return VINF_SUCCESS;
940	if (VBOX_FAILURE(rc))
941	{
942	AssertMsgFailed(("Failed to attach driver below us! rc=%Vra\n", rc));
943	return rc;
944	}
945	pData->pDrvMedia = (PPDMIMEDIA)pBase->pfnQueryInterface(pBase, PDMINTERFACE_MEDIA);
946	if (!pData->pDrvMedia)
947	{
948	AssertMsgFailed(("Configuration error: No media or async media interface below!\n"));
949	return VERR_PDM_MISSING_INTERFACE_BELOW;
950	}
951
952	/* Try to get the optional async interface. */
953	pData->pDrvMediaAsync = (PPDMIMEDIAASYNC)pBase->pfnQueryInterface(pBase, PDMINTERFACE_MEDIA_ASYNC);
954
955	if (RTUuidIsNull(&pData->Uuid))
956	{
957	if (pData->enmType == PDMBLOCKTYPE_HARD_DISK)
958	pData->pDrvMedia->pfnGetUuid(pData->pDrvMedia, &pData->Uuid);
959	}
960
961	return VINF_SUCCESS;
962	}
963
964
965	/**
966	* Block driver registration record.
967	*/
968	const PDMDRVREG g_DrvBlock =
969	{
970	/* u32Version */
971	PDM_DRVREG_VERSION,
972	/* szDriverName */
973	"Block",
974	/* pszDescription */
975	"Generic block driver.",
976	/* fFlags */
977	PDM_DRVREG_FLAGS_HOST_BITS_DEFAULT,
978	/* fClass. */
979	PDM_DRVREG_CLASS_BLOCK,
980	/* cMaxInstances */
981	~0,
982	/* cbInstance */
983	sizeof(DRVBLOCK),
984	/* pfnConstruct */
985	drvblockConstruct,
986	/* pfnDestruct */
987	NULL,
988	/* pfnIOCtl */
989	NULL,
990	/* pfnPowerOn */
991	NULL,
992	/* pfnReset */
993	drvblockReset,
994	/* pfnSuspend */
995	NULL,
996	/* pfnResume */
997	NULL,
998	/* pfnDetach */
999	drvblockDetach
1000	};

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source: vbox/trunk/src/VBox/Devices/Storage/DrvBlock.cpp@ 8529

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