StorageControllerImpl.cpp@ 33540

Last change on this file since 33540 was 32531, checked in by vboxsync, 14 years ago

Main/Medium+MediumFormat+GuestOSType+SystemPropertiesImpl+Console+Global: consistently use bytes as size units, forgotten const value in API, MaxVDISize method renamed to InfoVDSize, STDMETHOD macro usage fixes, whitespace cleanup

Frontends/VirtualBox+VBoxManage+VBoxShell: adapt to changed disk size units

Main/StorageControllerImpl: check the storage controller instance limit to avoid creating unusable VM configs, simplify unnecessarily complex code for querying the controller properties

Property svn:eol-style set to native
Property svn:keywords set to Author Date Id Revision

File size: 23.7 KB

Line
1	/* $Id: StorageControllerImpl.cpp 32531 2010-09-15 17:04:48Z 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	HRESULT rc = aParent->getVirtualBox()->getSystemProperties()->GetMaxInstancesOfStorageBus(aStorageBus, &maxInstances);
139	if (FAILED(rc))
140	return rc;
141	if (aInstance >= maxInstances)
142	return setError(E_INVALIDARG,
143	tr("Too many storage controllers of this type"));
144
145	/* Enclose the state transition NotReady->InInit->Ready */
146	AutoInitSpan autoInitSpan(this);
147	AssertReturn(autoInitSpan.isOk(), E_FAIL);
148
149	m = new Data(aParent);
150
151	/* m->pPeer is left null */
152
153	/* register with parent early, since uninit() will unconditionally
154	* unregister on failure */
155	m->pParent->addDependentChild(this);
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	/* register with parent early, since uninit() will unconditionally
230	* unregister on failure */
231	m->pParent->addDependentChild(this);
232
233	/* sanity */
234	AutoCaller thatCaller(aThat);
235	AssertComRCReturnRC(thatCaller.rc());
236
237	if (aReshare)
238	{
239	AutoWriteLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
240
241	unconst(aThat->m->pPeer) = this;
242	m->bd.attach (aThat->m->bd);
243	}
244	else
245	{
246	unconst(m->pPeer) = aThat;
247
248	AutoReadLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
249	m->bd.share (aThat->m->bd);
250	}
251
252	/* Confirm successful initialization */
253	autoInitSpan.setSucceeded();
254
255	return S_OK;
256	}
257
258	/**
259	* Initializes the storage controller object given another guest object
260	* (a kind of copy constructor). This object makes a private copy of data
261	* of the original object passed as an argument.
262	*/
263	HRESULT StorageController::initCopy(Machine aParent, StorageController aThat)
264	{
265	LogFlowThisFunc(("aParent=%p, aThat=%p\n", aParent, aThat));
266
267	ComAssertRet(aParent && aThat, E_INVALIDARG);
268
269	/* Enclose the state transition NotReady->InInit->Ready */
270	AutoInitSpan autoInitSpan(this);
271	AssertReturn(autoInitSpan.isOk(), E_FAIL);
272
273	m = new Data(aParent);
274	/* m->pPeer is left null */
275
276	m->pParent->addDependentChild(this);
277
278	AutoCaller thatCaller(aThat);
279	AssertComRCReturnRC(thatCaller.rc());
280
281	AutoReadLock thatlock(aThat COMMA_LOCKVAL_SRC_POS);
282	m->bd.attachCopy(aThat->m->bd);
283
284	/* Confirm a successful initialization */
285	autoInitSpan.setSucceeded();
286
287	return S_OK;
288	}
289
290
291	/**
292	* Uninitializes the instance and sets the ready flag to FALSE.
293	* Called either from FinalRelease() or by the parent when it gets destroyed.
294	*/
295	void StorageController::uninit()
296	{
297	LogFlowThisFunc(("\n"));
298
299	/* Enclose the state transition Ready->InUninit->NotReady */
300	AutoUninitSpan autoUninitSpan(this);
301	if (autoUninitSpan.uninitDone())
302	return;
303
304	m->bd.free();
305
306	m->pParent->removeDependentChild(this);
307
308	unconst(m->pPeer) = NULL;
309	unconst(m->pParent) = NULL;
310
311	delete m;
312	m = NULL;
313	}
314
315
316	// IStorageController properties
317	/////////////////////////////////////////////////////////////////////////////
318	STDMETHODIMP StorageController::COMGETTER(Name) (BSTR *aName)
319	{
320	CheckComArgOutPointerValid(aName);
321
322	AutoCaller autoCaller(this);
323	if (FAILED(autoCaller.rc())) return autoCaller.rc();
324
325	/* mName is constant during life time, no need to lock */
326	m->bd.data()->strName.cloneTo(aName);
327
328	return S_OK;
329	}
330
331	STDMETHODIMP StorageController::COMGETTER(Bus) (StorageBus_T *aBus)
332	{
333	CheckComArgOutPointerValid(aBus);
334
335	AutoCaller autoCaller(this);
336	if (FAILED(autoCaller.rc())) return autoCaller.rc();
337
338	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
339
340	*aBus = m->bd->mStorageBus;
341
342	return S_OK;
343	}
344
345	STDMETHODIMP StorageController::COMGETTER(ControllerType) (StorageControllerType_T *aControllerType)
346	{
347	CheckComArgOutPointerValid(aControllerType);
348
349	AutoCaller autoCaller(this);
350	if (FAILED(autoCaller.rc())) return autoCaller.rc();
351
352	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
353
354	*aControllerType = m->bd->mStorageControllerType;
355
356	return S_OK;
357	}
358
359	STDMETHODIMP StorageController::COMSETTER(ControllerType) (StorageControllerType_T aControllerType)
360	{
361	AutoCaller autoCaller(this);
362	if (FAILED(autoCaller.rc())) return autoCaller.rc();
363
364	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
365
366	HRESULT rc = S_OK;
367
368	switch (m->bd->mStorageBus)
369	{
370	case StorageBus_IDE:
371	{
372	if ( (aControllerType != StorageControllerType_PIIX3)
373	&& (aControllerType != StorageControllerType_PIIX4)
374	&& (aControllerType != StorageControllerType_ICH6))
375	rc = E_INVALIDARG;
376	break;
377	}
378	case StorageBus_SATA:
379	{
380	if (aControllerType != StorageControllerType_IntelAhci)
381	rc = E_INVALIDARG;
382	break;
383	}
384	case StorageBus_SCSI:
385	{
386	if ( (aControllerType != StorageControllerType_LsiLogic)
387	&& (aControllerType != StorageControllerType_BusLogic))
388	rc = E_INVALIDARG;
389	break;
390	}
391	case StorageBus_Floppy:
392	{
393	if (aControllerType != StorageControllerType_I82078)
394	rc = E_INVALIDARG;
395	break;
396	}
397	case StorageBus_SAS:
398	{
399	if (aControllerType != StorageControllerType_LsiLogicSas)
400	rc = E_INVALIDARG;
401	break;
402	}
403	default:
404	AssertMsgFailed(("Invalid controller type %d\n", m->bd->mStorageBus));
405	}
406
407	if (!SUCCEEDED(rc))
408	return setError(rc,
409	tr ("Invalid controller type %d"),
410	aControllerType);
411
412	m->bd->mStorageControllerType = aControllerType;
413
414	return S_OK;
415	}
416
417	STDMETHODIMP StorageController::COMGETTER(MaxDevicesPerPortCount) (ULONG *aMaxDevices)
418	{
419	CheckComArgOutPointerValid(aMaxDevices);
420
421	AutoCaller autoCaller(this);
422	if (FAILED(autoCaller.rc())) return autoCaller.rc();
423
424	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
425	HRESULT rc = m->pSystemProperties->GetMaxDevicesPerPortForStorageBus(m->bd->mStorageBus, aMaxDevices);
426
427	return rc;
428	}
429
430	STDMETHODIMP StorageController::COMGETTER(MinPortCount) (ULONG *aMinPortCount)
431	{
432	CheckComArgOutPointerValid(aMinPortCount);
433
434	AutoCaller autoCaller(this);
435	if (FAILED(autoCaller.rc())) return autoCaller.rc();
436
437	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
438	HRESULT rc = m->pSystemProperties->GetMinPortCountForStorageBus(m->bd->mStorageBus, aMinPortCount);
439
440	return rc;
441	}
442
443	STDMETHODIMP StorageController::COMGETTER(MaxPortCount) (ULONG *aMaxPortCount)
444	{
445	CheckComArgOutPointerValid(aMaxPortCount);
446
447	AutoCaller autoCaller(this);
448	if (FAILED(autoCaller.rc())) return autoCaller.rc();
449
450	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
451	HRESULT rc = m->pSystemProperties->GetMaxPortCountForStorageBus(m->bd->mStorageBus, aMaxPortCount);
452
453	return rc;
454	}
455
456
457	STDMETHODIMP StorageController::COMGETTER(PortCount) (ULONG *aPortCount)
458	{
459	CheckComArgOutPointerValid(aPortCount);
460
461	AutoCaller autoCaller(this);
462	if (FAILED(autoCaller.rc())) return autoCaller.rc();
463
464	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
465
466	*aPortCount = m->bd->mPortCount;
467
468	return S_OK;
469	}
470
471
472	STDMETHODIMP StorageController::COMSETTER(PortCount) (ULONG aPortCount)
473	{
474	LogFlowThisFunc(("aPortCount=%u\n", aPortCount));
475
476	switch (m->bd->mStorageBus)
477	{
478	case StorageBus_SATA:
479	{
480	/* AHCI SATA supports a maximum of 30 ports. */
481	if ((aPortCount < 1) \|\| (aPortCount > 30))
482	return setError(E_INVALIDARG,
483	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
484	aPortCount, 1, 30);
485	break;
486	}
487	case StorageBus_SCSI:
488	{
489	/*
490	* SCSI does not support setting different ports.
491	* (doesn't make sense here either).
492	* The maximum and minimum is 16 and unless the callee
493	* tries to set a different value we return an error.
494	*/
495	if (aPortCount != 16)
496	return setError(E_INVALIDARG,
497	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
498	aPortCount, 16, 16);
499	break;
500	}
501	case StorageBus_IDE:
502	{
503	/*
504	* The port count is fixed to 2.
505	*/
506	if (aPortCount != 2)
507	return setError(E_INVALIDARG,
508	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
509	aPortCount, 2, 2);
510	break;
511	}
512	case StorageBus_Floppy:
513	{
514	/*
515	* The port count is fixed to 1.
516	*/
517	if (aPortCount != 1)
518	return setError(E_INVALIDARG,
519	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
520	aPortCount, 1, 1);
521	break;
522	}
523	case StorageBus_SAS:
524	{
525	/*
526	* The port count is fixed to 8.
527	*/
528	if (aPortCount != 8)
529	return setError(E_INVALIDARG,
530	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
531	aPortCount, 8, 8);
532	break;
533	}
534	default:
535	AssertMsgFailed(("Invalid controller type %d\n", m->bd->mStorageBus));
536	}
537
538	AutoCaller autoCaller(this);
539	if (FAILED(autoCaller.rc())) return autoCaller.rc();
540
541	/* the machine needs to be mutable */
542	AutoMutableStateDependency adep(m->pParent);
543	if (FAILED(adep.rc())) return adep.rc();
544
545	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
546
547	if (m->bd->mPortCount != aPortCount)
548	{
549	m->bd.backup();
550	m->bd->mPortCount = aPortCount;
551
552	alock.release();
553	AutoWriteLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); // m->pParent is const, needs no locking
554	m->pParent->setModified(Machine::IsModified_Storage);
555	mlock.release();
556
557	m->pParent->onStorageControllerChange();
558	}
559
560	return S_OK;
561	}
562
563	STDMETHODIMP StorageController::COMGETTER(Instance) (ULONG *aInstance)
564	{
565	AutoCaller autoCaller(this);
566	if (FAILED(autoCaller.rc())) return autoCaller.rc();
567
568	/* The machine doesn't need to be mutable. */
569
570	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
571
572	*aInstance = m->bd->mInstance;
573
574	return S_OK;
575	}
576
577	STDMETHODIMP StorageController::COMSETTER(Instance) (ULONG aInstance)
578	{
579	AutoCaller autoCaller(this);
580	if (FAILED(autoCaller.rc())) return autoCaller.rc();
581
582	/* The machine doesn't need to be mutable. */
583
584	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
585
586	m->bd->mInstance = aInstance;
587
588	return S_OK;
589	}
590
591	STDMETHODIMP StorageController::COMGETTER(UseHostIOCache) (BOOL *fUseHostIOCache)
592	{
593	AutoCaller autoCaller(this);
594	if (FAILED(autoCaller.rc())) return autoCaller.rc();
595
596	/* The machine doesn't need to be mutable. */
597
598	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
599
600	*fUseHostIOCache = m->bd->fUseHostIOCache;
601
602	return S_OK;
603	}
604
605	STDMETHODIMP StorageController::COMSETTER(UseHostIOCache) (BOOL fUseHostIOCache)
606	{
607	AutoCaller autoCaller(this);
608	if (FAILED(autoCaller.rc())) return autoCaller.rc();
609
610	/* the machine needs to be mutable */
611	AutoMutableStateDependency adep(m->pParent);
612	if (FAILED(adep.rc())) return adep.rc();
613
614	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
615
616	if (m->bd->fUseHostIOCache != !!fUseHostIOCache)
617	{
618	m->bd.backup();
619	m->bd->fUseHostIOCache = !!fUseHostIOCache;
620
621	alock.release();
622	AutoWriteLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); // m->pParent is const, needs no locking
623	m->pParent->setModified(Machine::IsModified_Storage);
624	mlock.release();
625
626	m->pParent->onStorageControllerChange();
627	}
628
629	return S_OK;
630	}
631
632	// IStorageController methods
633	/////////////////////////////////////////////////////////////////////////////
634
635	STDMETHODIMP StorageController::GetIDEEmulationPort(LONG DevicePosition, LONG *aPortNumber)
636	{
637	CheckComArgOutPointerValid(aPortNumber);
638
639	AutoCaller autoCaller(this);
640	if (FAILED(autoCaller.rc())) return autoCaller.rc();
641
642	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
643
644	if (m->bd->mStorageControllerType != StorageControllerType_IntelAhci)
645	return setError(E_NOTIMPL,
646	tr("Invalid controller type"));
647
648	switch (DevicePosition)
649	{
650	case 0:
651	*aPortNumber = m->bd->mPortIde0Master;
652	break;
653	case 1:
654	*aPortNumber = m->bd->mPortIde0Slave;
655	break;
656	case 2:
657	*aPortNumber = m->bd->mPortIde1Master;
658	break;
659	case 3:
660	*aPortNumber = m->bd->mPortIde1Slave;
661	break;
662	default:
663	return E_INVALIDARG;
664	}
665
666	return S_OK;
667	}
668
669	STDMETHODIMP StorageController::SetIDEEmulationPort(LONG DevicePosition, LONG aPortNumber)
670	{
671	AutoCaller autoCaller(this);
672	if (FAILED(autoCaller.rc())) return autoCaller.rc();
673
674	/* the machine needs to be mutable */
675	AutoMutableStateDependency adep(m->pParent);
676	if (FAILED(adep.rc())) return adep.rc();
677	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
678
679	if (m->bd->mStorageControllerType != StorageControllerType_IntelAhci)
680	return setError(E_NOTIMPL,
681	tr("Invalid controller type"));
682
683	if ((aPortNumber < 0) \|\| (aPortNumber >= 30))
684	return setError(E_INVALIDARG,
685	tr("Invalid port number: %l (must be in range [%lu, %lu])"),
686	aPortNumber, 0, 29);
687
688	switch (DevicePosition)
689	{
690	case 0:
691	m->bd->mPortIde0Master = aPortNumber;
692	break;
693	case 1:
694	m->bd->mPortIde0Slave = aPortNumber;
695	break;
696	case 2:
697	m->bd->mPortIde1Master = aPortNumber;
698	break;
699	case 3:
700	m->bd->mPortIde1Slave = aPortNumber;
701	break;
702	default:
703	return E_INVALIDARG;
704	}
705
706	return S_OK;
707	}
708
709	// public methods only for internal purposes
710	/////////////////////////////////////////////////////////////////////////////
711
712
713	const Utf8Str& StorageController::getName() const
714	{
715	return m->bd->strName;
716	}
717
718	StorageControllerType_T StorageController::getControllerType() const
719	{
720	return m->bd->mStorageControllerType;
721	}
722
723	StorageBus_T StorageController::getStorageBus() const
724	{
725	return m->bd->mStorageBus;
726	}
727
728	ULONG StorageController::getInstance() const
729	{
730	return m->bd->mInstance;
731	}
732
733	/**
734	* Returns S_OK if the given port and device numbers are within the range supported
735	* by this controller. If not, it sets an error and returns E_INVALIDARG.
736	* @param ulPort
737	* @param ulDevice
738	* @return
739	*/
740	HRESULT StorageController::checkPortAndDeviceValid(LONG aControllerPort,
741	LONG aDevice)
742	{
743	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
744
745	ULONG portCount = m->bd->mPortCount;
746	ULONG devicesPerPort;
747	HRESULT rc = m->pSystemProperties->GetMaxDevicesPerPortForStorageBus(m->bd->mStorageBus, &devicesPerPort);
748	if (FAILED(rc)) return rc;
749
750	if ( (aControllerPort < 0)
751	\|\| (aControllerPort >= (LONG)portCount)
752	\|\| (aDevice < 0)
753	\|\| (aDevice >= (LONG)devicesPerPort)
754	)
755	return setError(E_INVALIDARG,
756	tr("The port and/or count parameter are out of range [%lu:%lu]"),
757	portCount,
758	devicesPerPort);
759
760	return S_OK;
761	}
762
763	/** @note Locks objects for writing! */
764	void StorageController::rollback()
765	{
766	AutoCaller autoCaller(this);
767	AssertComRCReturnVoid(autoCaller.rc());
768
769	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
770
771	m->bd.rollback();
772	}
773
774	/**
775	* @note Locks this object for writing, together with the peer object (also
776	* for writing) if there is one.
777	*/
778	void StorageController::commit()
779	{
780	/* sanity */
781	AutoCaller autoCaller(this);
782	AssertComRCReturnVoid (autoCaller.rc());
783
784	/* sanity too */
785	AutoCaller peerCaller (m->pPeer);
786	AssertComRCReturnVoid (peerCaller.rc());
787
788	/* lock both for writing since we modify both (m->pPeer is "master" so locked
789	* first) */
790	AutoMultiWriteLock2 alock(m->pPeer, this COMMA_LOCKVAL_SRC_POS);
791
792	if (m->bd.isBackedUp())
793	{
794	m->bd.commit();
795	if (m->pPeer)
796	{
797	// attach new data to the peer and reshare it
798	m->pPeer->m->bd.attach (m->bd);
799	}
800	}
801	}
802
803	/**
804	* Cancels sharing (if any) by making an independent copy of data.
805	* This operation also resets this object's peer to NULL.
806	*
807	* @note Locks this object for writing, together with the peer object
808	* represented by @a aThat (locked for reading).
809	*/
810	void StorageController::unshare()
811	{
812	/* sanity */
813	AutoCaller autoCaller(this);
814	AssertComRCReturnVoid (autoCaller.rc());
815
816	/* sanity too */
817	AutoCaller peerCaller (m->pPeer);
818	AssertComRCReturnVoid (peerCaller.rc());
819
820	/* peer is not modified, lock it for reading (m->pPeer is "master" so locked
821	* first) */
822	AutoReadLock rl(m->pPeer COMMA_LOCKVAL_SRC_POS);
823	AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
824
825	if (m->bd.isShared())
826	{
827	if (!m->bd.isBackedUp())
828	m->bd.backup();
829
830	m->bd.commit();
831	}
832
833	unconst(m->pPeer) = NULL;
834	}
835
836	Machine* StorageController::getMachine()
837	{
838	return m->pParent;
839	}
840
841	ComObjPtr<StorageController> StorageController::getPeer()
842	{
843	return m->pPeer;
844	}
845
846	// private methods
847	/////////////////////////////////////////////////////////////////////////////
848
849
850	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/StorageControllerImpl.cpp@ 33540

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