StorageControllerImpl.cpp@ 33944

Last change on this file since 33944 was 33915, checked in by vboxsync, 14 years ago
Main, QT/FE, VBoxManage: per-chipset controller count limits
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1	/* $Id: StorageControllerImpl.cpp 33915 2010-11-09 16:44:39Z vboxsync $ */
2
3	/** @file
4	*
5	* Implementation of IStorageController.
6	*/
7
8	/*
9	* Copyright (C) 2008-2010 Oracle Corporation
10	*
11	* This file is part of VirtualBox Open Source Edition (OSE), as
12	* available from http://www.virtualbox.org. This file is free software;
13	* you can redistribute it and/or modify it under the terms of the GNU
14	* General Public License (GPL) as published by the Free Software
15	* Foundation, in version 2 as it comes in the "COPYING" file of the
16	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
17	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
18	*/
19
20	#include "StorageControllerImpl.h"
21	#include "MachineImpl.h"
22	#include "VirtualBoxImpl.h"
23	#include "SystemPropertiesImpl.h"
24
25	#include <iprt/string.h>
26	#include <iprt/cpp/utils.h>
27
28	#include <VBox/err.h>
29	#include <VBox/settings.h>
30
31	#include <algorithm>
32
33	#include "AutoStateDep.h"
34	#include "AutoCaller.h"
35	#include "Logging.h"
36
37	// defines
38	/////////////////////////////////////////////////////////////////////////////
39
40	struct BackupableStorageControllerData
41	{
42	/* Constructor. */
43	BackupableStorageControllerData()
44	: mStorageBus(StorageBus_IDE),
45	mStorageControllerType(StorageControllerType_PIIX4),
46	mInstance(0),
47	mPortCount(2),
48	fUseHostIOCache(true),
49	mPortIde0Master(0),
50	mPortIde0Slave(1),
51	mPortIde1Master(2),
52	mPortIde1Slave(3)
53	{ }
54
55	/** Unique name of the storage controller. */
56	Utf8Str strName;
57	/** The connection type of the storage controller. */
58	StorageBus_T mStorageBus;
59	/** Type of the Storage controller. */
60	StorageControllerType_T mStorageControllerType;
61	/** Instance number of the storage controller. */
62	ULONG mInstance;
63	/** Number of usable ports. */
64	ULONG mPortCount;
65	/** Whether to use the host IO caches. */
66	BOOL fUseHostIOCache;
67
68	/** The following is only for the SATA controller atm. */
69	/** Port which acts as primary master for ide emulation. */
70	ULONG mPortIde0Master;
71	/** Port which acts as primary slave for ide emulation. */
72	ULONG mPortIde0Slave;
73	/** Port which acts as secondary master for ide emulation. */
74	ULONG mPortIde1Master;
75	/** Port which acts as secondary slave for ide emulation. */
76	ULONG mPortIde1Slave;
77	};
78
79	struct StorageController::Data
80	{
81	Data(Machine * const aMachine)
82	: pVirtualBox(NULL),
83	pSystemProperties(NULL),
84	pParent(aMachine)
85	{
86	unconst(pVirtualBox) = aMachine->getVirtualBox();
87	unconst(pSystemProperties) = pVirtualBox->getSystemProperties();
88	}
89
90	VirtualBox * const pVirtualBox;
91	SystemProperties * const pSystemProperties;
92
93	Machine * const pParent;
94	const ComObjPtr<StorageController> pPeer;
95
96	Backupable<BackupableStorageControllerData> bd;
97	};
98
99	// constructor / destructor
100	/////////////////////////////////////////////////////////////////////////////
101
102	HRESULT StorageController::FinalConstruct()
103	{
104	return S_OK;
105	}
106
107	void StorageController::FinalRelease()
108	{
109	uninit();
110	}
111
112	// public initializer/uninitializer for internal purposes only
113	/////////////////////////////////////////////////////////////////////////////
114
115	/**
116	* Initializes the storage controller object.
117	*
118	* @returns COM result indicator.
119	* @param aParent Pointer to our parent object.
120	* @param aName Name of the storage controller.
121	* @param aInstance Instance number of the storage controller.
122	*/
123	HRESULT StorageController::init(Machine *aParent,
124	const Utf8Str &aName,
125	StorageBus_T aStorageBus,
126	ULONG aInstance)
127	{
128	LogFlowThisFunc(("aParent=%p aName=\"%s\" aInstance=%u\n",
129	aParent, aName.c_str(), aInstance));
130
131	ComAssertRet(aParent && !aName.isEmpty(), E_INVALIDARG);
132	if ( (aStorageBus <= StorageBus_Null)
133	\|\| (aStorageBus > StorageBus_SAS))
134	return setError(E_INVALIDARG,
135	tr("Invalid storage connection type"));
136
137	ULONG maxInstances;
138	ChipsetType_T chipsetType;
139	HRESULT rc = aParent->COMGETTER(ChipsetType)(&chipsetType);
140	if (FAILED(rc))
141	return rc;
142	rc = aParent->getVirtualBox()->getSystemProperties()->GetMaxInstancesOfStorageBus(chipsetType, aStorageBus, &maxInstances);
143	if (FAILED(rc))
144	return rc;
145	if (aInstance >= maxInstances)
146	return setError(E_INVALIDARG,
147	tr("Too many storage controllers of this type"));
148
149	/* Enclose the state transition NotReady->InInit->Ready */
150	AutoInitSpan autoInitSpan(this);
151	AssertReturn(autoInitSpan.isOk(), E_FAIL);
152
153	m = new Data(aParent);
154
155	/* m->pPeer is left null */
156
157	m->bd.allocate();
158
159	m->bd->strName = aName;
160	m->bd->mInstance = aInstance;
161	m->bd->mStorageBus = aStorageBus;
162	if ( aStorageBus != StorageBus_IDE
163	&& aStorageBus != StorageBus_Floppy)
164	m->bd->fUseHostIOCache = false;
165	else
166	m->bd->fUseHostIOCache = true;
167
168	switch (aStorageBus)
169	{
170	case StorageBus_IDE:
171	m->bd->mPortCount = 2;
172	m->bd->mStorageControllerType = StorageControllerType_PIIX4;
173	break;
174	case StorageBus_SATA:
175	m->bd->mPortCount = 30;
176	m->bd->mStorageControllerType = StorageControllerType_IntelAhci;
177	break;
178	case StorageBus_SCSI:
179	m->bd->mPortCount = 16;
180	m->bd->mStorageControllerType = StorageControllerType_LsiLogic;
181	break;
182	case StorageBus_Floppy:
183	m->bd->mPortCount = 1;
184	m->bd->mStorageControllerType = StorageControllerType_I82078;
185	break;
186	case StorageBus_SAS:
187	m->bd->mPortCount = 8;
188	m->bd->mStorageControllerType = StorageControllerType_LsiLogicSas;
189	break;
190	}
191
192	/* Confirm a successful initialization */
193	autoInitSpan.setSucceeded();
194
195	return S_OK;
196	}
197
198	/**
199	* Initializes the object given another object
200	* (a kind of copy constructor). This object shares data with
201	* the object passed as an argument.
202	*
203	* @param aReshare
204	* When false, the original object will remain a data owner.
205	* Otherwise, data ownership will be transferred from the original
206	* object to this one.
207	*
208	* @note This object must be destroyed before the original object
209	* it shares data with is destroyed.
210	*
211	* @note Locks @a aThat object for writing if @a aReshare is @c true, or for
212	* reading if @a aReshare is false.
213	*/
214	HRESULT StorageController::init(Machine *aParent,
215	StorageController *aThat,
216	bool aReshare /* = false */)
217	{
218	LogFlowThisFunc(("aParent=%p, aThat=%p, aReshare=%RTbool\n",
219	aParent, aThat, aReshare));
220
221	ComAssertRet(aParent && aThat, E_INVALIDARG);
222
223	/* Enclose the state transition NotReady->InInit->Ready */
224	AutoInitSpan autoInitSpan(this);
225	AssertReturn(autoInitSpan.isOk(), E_FAIL);
226
227	m = new Data(aParent);
228
229	/* sanity */
230	AutoCaller thatCaller(aThat);
231	AssertComRCReturnRC(thatCaller.rc());
232
233	if (aReshare)
234	{
235	AutoWriteLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
236
237	unconst(aThat->m->pPeer) = this;
238	m->bd.attach (aThat->m->bd);
239	}
240	else
241	{
242	unconst(m->pPeer) = aThat;
243
244	AutoReadLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
245	m->bd.share (aThat->m->bd);
246	}
247
248	/* Confirm successful initialization */
249	autoInitSpan.setSucceeded();
250
251	return S_OK;
252	}
253
254	/**
255	* Initializes the storage controller object given another guest object
256	* (a kind of copy constructor). This object makes a private copy of data
257	* of the original object passed as an argument.
258	*/
259	HRESULT StorageController::initCopy(Machine aParent, StorageController aThat)
260	{
261	LogFlowThisFunc(("aParent=%p, aThat=%p\n", aParent, aThat));
262
263	ComAssertRet(aParent && aThat, E_INVALIDARG);
264
265	/* Enclose the state transition NotReady->InInit->Ready */
266	AutoInitSpan autoInitSpan(this);
267	AssertReturn(autoInitSpan.isOk(), E_FAIL);
268
269	m = new Data(aParent);
270	/* m->pPeer is left null */
271
272	AutoCaller thatCaller(aThat);
273	AssertComRCReturnRC(thatCaller.rc());
274
275	AutoReadLock thatlock(aThat COMMA_LOCKVAL_SRC_POS);
276	m->bd.attachCopy(aThat->m->bd);
277
278	/* Confirm a successful initialization */
279	autoInitSpan.setSucceeded();
280
281	return S_OK;
282	}
283
284
285	/**
286	* Uninitializes the instance and sets the ready flag to FALSE.
287	* Called either from FinalRelease() or by the parent when it gets destroyed.
288	*/
289	void StorageController::uninit()
290	{
291	LogFlowThisFunc(("\n"));
292
293	/* Enclose the state transition Ready->InUninit->NotReady */
294	AutoUninitSpan autoUninitSpan(this);
295	if (autoUninitSpan.uninitDone())
296	return;
297
298	m->bd.free();
299
300	unconst(m->pPeer) = NULL;
301	unconst(m->pParent) = NULL;
302
303	delete m;
304	m = NULL;
305	}
306
307
308	// IStorageController properties
309	/////////////////////////////////////////////////////////////////////////////
310	STDMETHODIMP StorageController::COMGETTER(Name) (BSTR *aName)
311	{
312	CheckComArgOutPointerValid(aName);
313
314	AutoCaller autoCaller(this);
315	if (FAILED(autoCaller.rc())) return autoCaller.rc();
316
317	/* mName is constant during life time, no need to lock */
318	m->bd.data()->strName.cloneTo(aName);
319
320	return S_OK;
321	}
322
323	STDMETHODIMP StorageController::COMGETTER(Bus) (StorageBus_T *aBus)
324	{
325	CheckComArgOutPointerValid(aBus);
326
327	AutoCaller autoCaller(this);
328	if (FAILED(autoCaller.rc())) return autoCaller.rc();
329
330	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
331
332	*aBus = m->bd->mStorageBus;
333
334	return S_OK;
335	}
336
337	STDMETHODIMP StorageController::COMGETTER(ControllerType) (StorageControllerType_T *aControllerType)
338	{
339	CheckComArgOutPointerValid(aControllerType);
340
341	AutoCaller autoCaller(this);
342	if (FAILED(autoCaller.rc())) return autoCaller.rc();
343
344	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
345
346	*aControllerType = m->bd->mStorageControllerType;
347
348	return S_OK;
349	}
350
351	STDMETHODIMP StorageController::COMSETTER(ControllerType) (StorageControllerType_T aControllerType)
352	{
353	AutoCaller autoCaller(this);
354	if (FAILED(autoCaller.rc())) return autoCaller.rc();
355
356	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
357
358	HRESULT rc = S_OK;
359
360	switch (m->bd->mStorageBus)
361	{
362	case StorageBus_IDE:
363	{
364	if ( (aControllerType != StorageControllerType_PIIX3)
365	&& (aControllerType != StorageControllerType_PIIX4)
366	&& (aControllerType != StorageControllerType_ICH6))
367	rc = E_INVALIDARG;
368	break;
369	}
370	case StorageBus_SATA:
371	{
372	if (aControllerType != StorageControllerType_IntelAhci)
373	rc = E_INVALIDARG;
374	break;
375	}
376	case StorageBus_SCSI:
377	{
378	if ( (aControllerType != StorageControllerType_LsiLogic)
379	&& (aControllerType != StorageControllerType_BusLogic))
380	rc = E_INVALIDARG;
381	break;
382	}
383	case StorageBus_Floppy:
384	{
385	if (aControllerType != StorageControllerType_I82078)
386	rc = E_INVALIDARG;
387	break;
388	}
389	case StorageBus_SAS:
390	{
391	if (aControllerType != StorageControllerType_LsiLogicSas)
392	rc = E_INVALIDARG;
393	break;
394	}
395	default:
396	AssertMsgFailed(("Invalid controller type %d\n", m->bd->mStorageBus));
397	}
398
399	if (!SUCCEEDED(rc))
400	return setError(rc,
401	tr ("Invalid controller type %d"),
402	aControllerType);
403
404	m->bd->mStorageControllerType = aControllerType;
405
406	return S_OK;
407	}
408
409	STDMETHODIMP StorageController::COMGETTER(MaxDevicesPerPortCount) (ULONG *aMaxDevices)
410	{
411	CheckComArgOutPointerValid(aMaxDevices);
412
413	AutoCaller autoCaller(this);
414	if (FAILED(autoCaller.rc())) return autoCaller.rc();
415
416	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
417	HRESULT rc = m->pSystemProperties->GetMaxDevicesPerPortForStorageBus(m->bd->mStorageBus, aMaxDevices);
418
419	return rc;
420	}
421
422	STDMETHODIMP StorageController::COMGETTER(MinPortCount) (ULONG *aMinPortCount)
423	{
424	CheckComArgOutPointerValid(aMinPortCount);
425
426	AutoCaller autoCaller(this);
427	if (FAILED(autoCaller.rc())) return autoCaller.rc();
428
429	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
430	HRESULT rc = m->pSystemProperties->GetMinPortCountForStorageBus(m->bd->mStorageBus, aMinPortCount);
431
432	return rc;
433	}
434
435	STDMETHODIMP StorageController::COMGETTER(MaxPortCount) (ULONG *aMaxPortCount)
436	{
437	CheckComArgOutPointerValid(aMaxPortCount);
438
439	AutoCaller autoCaller(this);
440	if (FAILED(autoCaller.rc())) return autoCaller.rc();
441
442	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
443	HRESULT rc = m->pSystemProperties->GetMaxPortCountForStorageBus(m->bd->mStorageBus, aMaxPortCount);
444
445	return rc;
446	}
447
448
449	STDMETHODIMP StorageController::COMGETTER(PortCount) (ULONG *aPortCount)
450	{
451	CheckComArgOutPointerValid(aPortCount);
452
453	AutoCaller autoCaller(this);
454	if (FAILED(autoCaller.rc())) return autoCaller.rc();
455
456	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
457
458	*aPortCount = m->bd->mPortCount;
459
460	return S_OK;
461	}
462
463
464	STDMETHODIMP StorageController::COMSETTER(PortCount) (ULONG aPortCount)
465	{
466	LogFlowThisFunc(("aPortCount=%u\n", aPortCount));
467
468	switch (m->bd->mStorageBus)
469	{
470	case StorageBus_SATA:
471	{
472	/* AHCI SATA supports a maximum of 30 ports. */
473	if ((aPortCount < 1) \|\| (aPortCount > 30))
474	return setError(E_INVALIDARG,
475	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
476	aPortCount, 1, 30);
477	break;
478	}
479	case StorageBus_SCSI:
480	{
481	/*
482	* SCSI does not support setting different ports.
483	* (doesn't make sense here either).
484	* The maximum and minimum is 16 and unless the callee
485	* tries to set a different value we return an error.
486	*/
487	if (aPortCount != 16)
488	return setError(E_INVALIDARG,
489	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
490	aPortCount, 16, 16);
491	break;
492	}
493	case StorageBus_IDE:
494	{
495	/*
496	* The port count is fixed to 2.
497	*/
498	if (aPortCount != 2)
499	return setError(E_INVALIDARG,
500	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
501	aPortCount, 2, 2);
502	break;
503	}
504	case StorageBus_Floppy:
505	{
506	/*
507	* The port count is fixed to 1.
508	*/
509	if (aPortCount != 1)
510	return setError(E_INVALIDARG,
511	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
512	aPortCount, 1, 1);
513	break;
514	}
515	case StorageBus_SAS:
516	{
517	/*
518	* The port count is fixed to 8.
519	*/
520	if (aPortCount != 8)
521	return setError(E_INVALIDARG,
522	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
523	aPortCount, 8, 8);
524	break;
525	}
526	default:
527	AssertMsgFailed(("Invalid controller type %d\n", m->bd->mStorageBus));
528	}
529
530	AutoCaller autoCaller(this);
531	if (FAILED(autoCaller.rc())) return autoCaller.rc();
532
533	/* the machine needs to be mutable */
534	AutoMutableStateDependency adep(m->pParent);
535	if (FAILED(adep.rc())) return adep.rc();
536
537	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
538
539	if (m->bd->mPortCount != aPortCount)
540	{
541	m->bd.backup();
542	m->bd->mPortCount = aPortCount;
543
544	alock.release();
545	AutoWriteLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); // m->pParent is const, needs no locking
546	m->pParent->setModified(Machine::IsModified_Storage);
547	mlock.release();
548
549	m->pParent->onStorageControllerChange();
550	}
551
552	return S_OK;
553	}
554
555	STDMETHODIMP StorageController::COMGETTER(Instance) (ULONG *aInstance)
556	{
557	AutoCaller autoCaller(this);
558	if (FAILED(autoCaller.rc())) return autoCaller.rc();
559
560	/* The machine doesn't need to be mutable. */
561
562	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
563
564	*aInstance = m->bd->mInstance;
565
566	return S_OK;
567	}
568
569	STDMETHODIMP StorageController::COMSETTER(Instance) (ULONG aInstance)
570	{
571	AutoCaller autoCaller(this);
572	if (FAILED(autoCaller.rc())) return autoCaller.rc();
573
574	/* The machine doesn't need to be mutable. */
575
576	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
577
578	m->bd->mInstance = aInstance;
579
580	return S_OK;
581	}
582
583	STDMETHODIMP StorageController::COMGETTER(UseHostIOCache) (BOOL *fUseHostIOCache)
584	{
585	AutoCaller autoCaller(this);
586	if (FAILED(autoCaller.rc())) return autoCaller.rc();
587
588	/* The machine doesn't need to be mutable. */
589
590	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
591
592	*fUseHostIOCache = m->bd->fUseHostIOCache;
593
594	return S_OK;
595	}
596
597	STDMETHODIMP StorageController::COMSETTER(UseHostIOCache) (BOOL fUseHostIOCache)
598	{
599	AutoCaller autoCaller(this);
600	if (FAILED(autoCaller.rc())) return autoCaller.rc();
601
602	/* the machine needs to be mutable */
603	AutoMutableStateDependency adep(m->pParent);
604	if (FAILED(adep.rc())) return adep.rc();
605
606	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
607
608	if (m->bd->fUseHostIOCache != !!fUseHostIOCache)
609	{
610	m->bd.backup();
611	m->bd->fUseHostIOCache = !!fUseHostIOCache;
612
613	alock.release();
614	AutoWriteLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); // m->pParent is const, needs no locking
615	m->pParent->setModified(Machine::IsModified_Storage);
616	mlock.release();
617
618	m->pParent->onStorageControllerChange();
619	}
620
621	return S_OK;
622	}
623
624	// IStorageController methods
625	/////////////////////////////////////////////////////////////////////////////
626
627	STDMETHODIMP StorageController::GetIDEEmulationPort(LONG DevicePosition, LONG *aPortNumber)
628	{
629	CheckComArgOutPointerValid(aPortNumber);
630
631	AutoCaller autoCaller(this);
632	if (FAILED(autoCaller.rc())) return autoCaller.rc();
633
634	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
635
636	if (m->bd->mStorageControllerType != StorageControllerType_IntelAhci)
637	return setError(E_NOTIMPL,
638	tr("Invalid controller type"));
639
640	switch (DevicePosition)
641	{
642	case 0:
643	*aPortNumber = m->bd->mPortIde0Master;
644	break;
645	case 1:
646	*aPortNumber = m->bd->mPortIde0Slave;
647	break;
648	case 2:
649	*aPortNumber = m->bd->mPortIde1Master;
650	break;
651	case 3:
652	*aPortNumber = m->bd->mPortIde1Slave;
653	break;
654	default:
655	return E_INVALIDARG;
656	}
657
658	return S_OK;
659	}
660
661	STDMETHODIMP StorageController::SetIDEEmulationPort(LONG DevicePosition, LONG aPortNumber)
662	{
663	AutoCaller autoCaller(this);
664	if (FAILED(autoCaller.rc())) return autoCaller.rc();
665
666	/* the machine needs to be mutable */
667	AutoMutableStateDependency adep(m->pParent);
668	if (FAILED(adep.rc())) return adep.rc();
669	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
670
671	if (m->bd->mStorageControllerType != StorageControllerType_IntelAhci)
672	return setError(E_NOTIMPL,
673	tr("Invalid controller type"));
674
675	if ((aPortNumber < 0) \|\| (aPortNumber >= 30))
676	return setError(E_INVALIDARG,
677	tr("Invalid port number: %l (must be in range [%lu, %lu])"),
678	aPortNumber, 0, 29);
679
680	switch (DevicePosition)
681	{
682	case 0:
683	m->bd->mPortIde0Master = aPortNumber;
684	break;
685	case 1:
686	m->bd->mPortIde0Slave = aPortNumber;
687	break;
688	case 2:
689	m->bd->mPortIde1Master = aPortNumber;
690	break;
691	case 3:
692	m->bd->mPortIde1Slave = aPortNumber;
693	break;
694	default:
695	return E_INVALIDARG;
696	}
697
698	return S_OK;
699	}
700
701	// public methods only for internal purposes
702	/////////////////////////////////////////////////////////////////////////////
703
704
705	const Utf8Str& StorageController::getName() const
706	{
707	return m->bd->strName;
708	}
709
710	StorageControllerType_T StorageController::getControllerType() const
711	{
712	return m->bd->mStorageControllerType;
713	}
714
715	StorageBus_T StorageController::getStorageBus() const
716	{
717	return m->bd->mStorageBus;
718	}
719
720	ULONG StorageController::getInstance() const
721	{
722	return m->bd->mInstance;
723	}
724
725	/**
726	* Returns S_OK if the given port and device numbers are within the range supported
727	* by this controller. If not, it sets an error and returns E_INVALIDARG.
728	* @param ulPort
729	* @param ulDevice
730	* @return
731	*/
732	HRESULT StorageController::checkPortAndDeviceValid(LONG aControllerPort,
733	LONG aDevice)
734	{
735	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
736
737	ULONG portCount = m->bd->mPortCount;
738	ULONG devicesPerPort;
739	HRESULT rc = m->pSystemProperties->GetMaxDevicesPerPortForStorageBus(m->bd->mStorageBus, &devicesPerPort);
740	if (FAILED(rc)) return rc;
741
742	if ( (aControllerPort < 0)
743	\|\| (aControllerPort >= (LONG)portCount)
744	\|\| (aDevice < 0)
745	\|\| (aDevice >= (LONG)devicesPerPort)
746	)
747	return setError(E_INVALIDARG,
748	tr("The port and/or count parameter are out of range [%lu:%lu]"),
749	portCount,
750	devicesPerPort);
751
752	return S_OK;
753	}
754
755	/** @note Locks objects for writing! */
756	void StorageController::rollback()
757	{
758	AutoCaller autoCaller(this);
759	AssertComRCReturnVoid(autoCaller.rc());
760
761	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
762
763	m->bd.rollback();
764	}
765
766	/**
767	* @note Locks this object for writing, together with the peer object (also
768	* for writing) if there is one.
769	*/
770	void StorageController::commit()
771	{
772	/* sanity */
773	AutoCaller autoCaller(this);
774	AssertComRCReturnVoid (autoCaller.rc());
775
776	/* sanity too */
777	AutoCaller peerCaller (m->pPeer);
778	AssertComRCReturnVoid (peerCaller.rc());
779
780	/* lock both for writing since we modify both (m->pPeer is "master" so locked
781	* first) */
782	AutoMultiWriteLock2 alock(m->pPeer, this COMMA_LOCKVAL_SRC_POS);
783
784	if (m->bd.isBackedUp())
785	{
786	m->bd.commit();
787	if (m->pPeer)
788	{
789	// attach new data to the peer and reshare it
790	m->pPeer->m->bd.attach (m->bd);
791	}
792	}
793	}
794
795	/**
796	* Cancels sharing (if any) by making an independent copy of data.
797	* This operation also resets this object's peer to NULL.
798	*
799	* @note Locks this object for writing, together with the peer object
800	* represented by @a aThat (locked for reading).
801	*/
802	void StorageController::unshare()
803	{
804	/* sanity */
805	AutoCaller autoCaller(this);
806	AssertComRCReturnVoid (autoCaller.rc());
807
808	/* sanity too */
809	AutoCaller peerCaller (m->pPeer);
810	AssertComRCReturnVoid (peerCaller.rc());
811
812	/* peer is not modified, lock it for reading (m->pPeer is "master" so locked
813	* first) */
814	AutoReadLock rl(m->pPeer COMMA_LOCKVAL_SRC_POS);
815	AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
816
817	if (m->bd.isShared())
818	{
819	if (!m->bd.isBackedUp())
820	m->bd.backup();
821
822	m->bd.commit();
823	}
824
825	unconst(m->pPeer) = NULL;
826	}
827
828	Machine* StorageController::getMachine()
829	{
830	return m->pParent;
831	}
832
833	ComObjPtr<StorageController> StorageController::getPeer()
834	{
835	return m->pPeer;
836	}
837
838	// private methods
839	/////////////////////////////////////////////////////////////////////////////
840
841
842	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/StorageControllerImpl.cpp@ 33944

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