StorageControllerImpl.cpp@ 86186

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1	/* $Id: StorageControllerImpl.cpp 82968 2020-02-04 10:35:17Z vboxsync $ */
2	/** @file
3	* Implementation of IStorageController.
4	*/
5
6	/*
7	* Copyright (C) 2008-2020 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17
18	#define LOG_GROUP LOG_GROUP_MAIN_STORAGECONTROLLER
19	#include "StorageControllerImpl.h"
20	#include "MachineImpl.h"
21	#include "VirtualBoxImpl.h"
22	#include "SystemPropertiesImpl.h"
23
24	#include <iprt/string.h>
25	#include <iprt/cpp/utils.h>
26
27	#include <iprt/errcore.h>
28	#include <VBox/settings.h>
29
30	#include <algorithm>
31
32	#include "AutoStateDep.h"
33	#include "AutoCaller.h"
34	#include "LoggingNew.h"
35
36	// defines
37	/////////////////////////////////////////////////////////////////////////////
38
39	struct StorageController::Data
40	{
41	Data(Machine * const aMachine)
42	: pVirtualBox(NULL),
43	pSystemProperties(NULL),
44	pParent(aMachine)
45	{
46	unconst(pVirtualBox) = aMachine->i_getVirtualBox();
47	unconst(pSystemProperties) = pVirtualBox->i_getSystemProperties();
48	}
49
50	VirtualBox * const pVirtualBox;
51	SystemProperties * const pSystemProperties;
52	Machine * const pParent;
53	const ComObjPtr<StorageController> pPeer;
54
55	Backupable<settings::StorageController> bd;
56	};
57
58
59	// constructor / destructor
60	/////////////////////////////////////////////////////////////////////////////
61
62	DEFINE_EMPTY_CTOR_DTOR(StorageController)
63
64	HRESULT StorageController::FinalConstruct()
65	{
66	return BaseFinalConstruct();
67	}
68
69	void StorageController::FinalRelease()
70	{
71	uninit();
72	BaseFinalRelease();
73	}
74
75	// public initializer/uninitializer for internal purposes only
76	/////////////////////////////////////////////////////////////////////////////
77
78	/**
79	* Initializes the storage controller object.
80	*
81	* @returns COM result indicator.
82	* @param aParent Pointer to our parent object.
83	* @param aName Name of the storage controller.
84	* @param aStorageBus Type of the storage bus.
85	* @param aInstance Instance number of the storage controller.
86	* @param fBootable Bootable flag.
87	*/
88	HRESULT StorageController::init(Machine *aParent,
89	const Utf8Str &aName,
90	StorageBus_T aStorageBus,
91	ULONG aInstance, bool fBootable)
92	{
93	LogFlowThisFunc(("aParent=%p aName=\"%s\" aInstance=%u\n",
94	aParent, aName.c_str(), aInstance));
95
96	ComAssertRet(aParent && !aName.isEmpty(), E_INVALIDARG);
97	if ( (aStorageBus <= StorageBus_Null)
98	\|\| (aStorageBus > StorageBus_VirtioSCSI))
99	return setError(E_INVALIDARG,
100	tr("Invalid storage connection type"));
101
102	ULONG maxInstances;
103	ChipsetType_T chipsetType;
104	HRESULT rc = aParent->COMGETTER(ChipsetType)(&chipsetType);
105	if (FAILED(rc))
106	return rc;
107	rc = aParent->i_getVirtualBox()->i_getSystemProperties()->
108	GetMaxInstancesOfStorageBus(chipsetType, aStorageBus, &maxInstances);
109	if (FAILED(rc))
110	return rc;
111	if (aInstance >= maxInstances)
112	return setError(E_INVALIDARG,
113	tr("Too many storage controllers of this type"));
114
115	/* Enclose the state transition NotReady->InInit->Ready */
116	AutoInitSpan autoInitSpan(this);
117	AssertReturn(autoInitSpan.isOk(), E_FAIL);
118
119	m = new Data(aParent);
120
121	/* m->pPeer is left null */
122
123	m->bd.allocate();
124
125	m->bd->strName = aName;
126	m->bd->ulInstance = aInstance;
127	m->bd->fBootable = fBootable;
128	m->bd->storageBus = aStorageBus;
129	if ( aStorageBus != StorageBus_IDE
130	&& aStorageBus != StorageBus_Floppy)
131	m->bd->fUseHostIOCache = false;
132	else
133	m->bd->fUseHostIOCache = true;
134
135	switch (aStorageBus)
136	{
137	case StorageBus_IDE:
138	m->bd->ulPortCount = 2;
139	m->bd->controllerType = StorageControllerType_PIIX4;
140	break;
141	case StorageBus_SATA:
142	m->bd->ulPortCount = 30;
143	m->bd->controllerType = StorageControllerType_IntelAhci;
144	break;
145	case StorageBus_SCSI:
146	m->bd->ulPortCount = 16;
147	m->bd->controllerType = StorageControllerType_LsiLogic;
148	break;
149	case StorageBus_Floppy:
150	m->bd->ulPortCount = 1;
151	m->bd->controllerType = StorageControllerType_I82078;
152	break;
153	case StorageBus_SAS:
154	m->bd->ulPortCount = 8;
155	m->bd->controllerType = StorageControllerType_LsiLogicSas;
156	break;
157	case StorageBus_USB:
158	m->bd->ulPortCount = 8;
159	m->bd->controllerType = StorageControllerType_USB;
160	break;
161	case StorageBus_PCIe:
162	m->bd->ulPortCount = 1;
163	m->bd->controllerType = StorageControllerType_NVMe;
164	break;
165	case StorageBus_VirtioSCSI:
166	m->bd->ulPortCount = 1;
167	m->bd->controllerType = StorageControllerType_VirtioSCSI;
168	break;
169	case StorageBus_Null: break; /* Shut up MSC. */
170	#ifdef VBOX_WITH_XPCOM_CPP_ENUM_HACK
171	case StorageBus_32BitHack: break; /* Shut up GCC. */
172	#endif
173	}
174
175	/* Confirm a successful initialization */
176	autoInitSpan.setSucceeded();
177
178	return S_OK;
179	}
180
181	/**
182	* Initializes the object given another object
183	* (a kind of copy constructor). This object shares data with
184	* the object passed as an argument.
185	*
186	* @param aParent Pointer to our parent object.
187	* @param aThat
188	* @param aReshare
189	* When false, the original object will remain a data owner.
190	* Otherwise, data ownership will be transferred from the original
191	* object to this one.
192	*
193	* @note This object must be destroyed before the original object
194	* it shares data with is destroyed.
195	*
196	* @note Locks @a aThat object for writing if @a aReshare is @c true, or for
197	* reading if @a aReshare is false.
198	*/
199	HRESULT StorageController::init(Machine *aParent,
200	StorageController *aThat,
201	bool aReshare /* = false */)
202	{
203	LogFlowThisFunc(("aParent=%p, aThat=%p, aReshare=%RTbool\n",
204	aParent, aThat, aReshare));
205
206	ComAssertRet(aParent && aThat, E_INVALIDARG);
207
208	/* Enclose the state transition NotReady->InInit->Ready */
209	AutoInitSpan autoInitSpan(this);
210	AssertReturn(autoInitSpan.isOk(), E_FAIL);
211
212	m = new Data(aParent);
213
214	/* sanity */
215	AutoCaller thatCaller(aThat);
216	AssertComRCReturnRC(thatCaller.rc());
217
218	if (aReshare)
219	{
220	AutoWriteLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
221
222	unconst(aThat->m->pPeer) = this;
223	m->bd.attach(aThat->m->bd);
224	}
225	else
226	{
227	unconst(m->pPeer) = aThat;
228
229	AutoReadLock thatLock(aThat COMMA_LOCKVAL_SRC_POS);
230	m->bd.share(aThat->m->bd);
231	}
232
233	/* Confirm successful initialization */
234	autoInitSpan.setSucceeded();
235
236	return S_OK;
237	}
238
239	/**
240	* Initializes the storage controller object given another guest object
241	* (a kind of copy constructor). This object makes a private copy of data
242	* of the original object passed as an argument.
243	*/
244	HRESULT StorageController::initCopy(Machine aParent, StorageController aThat)
245	{
246	LogFlowThisFunc(("aParent=%p, aThat=%p\n", aParent, aThat));
247
248	ComAssertRet(aParent && aThat, E_INVALIDARG);
249
250	/* Enclose the state transition NotReady->InInit->Ready */
251	AutoInitSpan autoInitSpan(this);
252	AssertReturn(autoInitSpan.isOk(), E_FAIL);
253
254	m = new Data(aParent);
255	/* m->pPeer is left null */
256
257	AutoCaller thatCaller(aThat);
258	AssertComRCReturnRC(thatCaller.rc());
259
260	AutoReadLock thatlock(aThat COMMA_LOCKVAL_SRC_POS);
261	m->bd.attachCopy(aThat->m->bd);
262
263	/* Confirm a successful initialization */
264	autoInitSpan.setSucceeded();
265
266	return S_OK;
267	}
268
269
270	/**
271	* Uninitializes the instance and sets the ready flag to FALSE.
272	* Called either from FinalRelease() or by the parent when it gets destroyed.
273	*/
274	void StorageController::uninit()
275	{
276	LogFlowThisFunc(("\n"));
277
278	/* Enclose the state transition Ready->InUninit->NotReady */
279	AutoUninitSpan autoUninitSpan(this);
280	if (autoUninitSpan.uninitDone())
281	return;
282
283	m->bd.free();
284
285	unconst(m->pPeer) = NULL;
286	unconst(m->pParent) = NULL;
287
288	delete m;
289	m = NULL;
290	}
291
292
293	// IStorageController properties
294	HRESULT StorageController::getName(com::Utf8Str &aName)
295	{
296	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
297
298	aName = m->bd->strName;
299
300	return S_OK;
301	}
302
303	HRESULT StorageController::setName(const com::Utf8Str &aName)
304	{
305	/* the machine needs to be mutable */
306	AutoMutableStateDependency adep(m->pParent);
307	if (FAILED(adep.rc())) return adep.rc();
308
309	AutoMultiWriteLock2 alock(m->pParent, this COMMA_LOCKVAL_SRC_POS);
310
311	if (m->bd->strName != aName)
312	{
313	ComObjPtr<StorageController> ctrl;
314	HRESULT rc = m->pParent->i_getStorageControllerByName(aName, ctrl, false /* aSetError */);
315	if (SUCCEEDED(rc))
316	return setError(VBOX_E_OBJECT_IN_USE,
317	tr("Storage controller named '%s' already exists"),
318	aName.c_str());
319
320	Machine::MediumAttachmentList atts;
321	rc = m->pParent->i_getMediumAttachmentsOfController(m->bd->strName, atts);
322	for (Machine::MediumAttachmentList::const_iterator
323	it = atts.begin();
324	it != atts.end();
325	++it)
326	{
327	IMediumAttachment iA = it;
328	MediumAttachment pAttach = static_cast<MediumAttachment >(iA);
329	AutoWriteLock attlock(pAttach COMMA_LOCKVAL_SRC_POS);
330	pAttach->i_updateName(aName);
331	}
332
333
334	m->bd.backup();
335	m->bd->strName = aName;
336
337	m->pParent->i_setModified(Machine::IsModified_Storage);
338	alock.release();
339
340	m->pParent->i_onStorageControllerChange(m->pParent->i_getId(), aName);
341	}
342
343	return S_OK;
344	}
345
346	HRESULT StorageController::getBus(StorageBus_T *aBus)
347	{
348	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
349
350	*aBus = m->bd->storageBus;
351
352	return S_OK;
353	}
354
355	HRESULT StorageController::getControllerType(StorageControllerType_T *aControllerType)
356	{
357	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
358
359	*aControllerType = m->bd->controllerType;
360
361	return S_OK;
362	}
363
364	HRESULT StorageController::setControllerType(StorageControllerType_T aControllerType)
365	{
366	/* the machine needs to be mutable */
367	AutoMutableStateDependency adep(m->pParent);
368	if (FAILED(adep.rc())) return adep.rc();
369
370	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
371
372	HRESULT rc = S_OK;
373
374	switch (m->bd->storageBus)
375	{
376	case StorageBus_IDE:
377	{
378	if ( (aControllerType != StorageControllerType_PIIX3)
379	&& (aControllerType != StorageControllerType_PIIX4)
380	&& (aControllerType != StorageControllerType_ICH6))
381	rc = E_INVALIDARG;
382	break;
383	}
384	case StorageBus_SATA:
385	{
386	if (aControllerType != StorageControllerType_IntelAhci)
387	rc = E_INVALIDARG;
388	break;
389	}
390	case StorageBus_SCSI:
391	{
392	if ( (aControllerType != StorageControllerType_LsiLogic)
393	&& (aControllerType != StorageControllerType_BusLogic))
394	rc = E_INVALIDARG;
395	break;
396	}
397	case StorageBus_Floppy:
398	{
399	if (aControllerType != StorageControllerType_I82078)
400	rc = E_INVALIDARG;
401	break;
402	}
403	case StorageBus_SAS:
404	{
405	if (aControllerType != StorageControllerType_LsiLogicSas)
406	rc = E_INVALIDARG;
407	break;
408	}
409	case StorageBus_USB:
410	{
411	if (aControllerType != StorageControllerType_USB)
412	rc = E_INVALIDARG;
413	break;
414	}
415	case StorageBus_PCIe:
416	{
417	if (aControllerType != StorageControllerType_NVMe)
418	rc = E_INVALIDARG;
419	break;
420	}
421	case StorageBus_VirtioSCSI:
422	{
423	if (aControllerType != StorageControllerType_VirtioSCSI)
424	rc = E_INVALIDARG;
425	break;
426	}
427	default:
428	AssertMsgFailed(("Invalid controller type %d\n", m->bd->storageBus));
429	rc = E_INVALIDARG;
430	}
431
432	if (!SUCCEEDED(rc))
433	return setError(rc,
434	tr("Invalid controller type %d"),
435	aControllerType);
436
437	if (m->bd->controllerType != aControllerType)
438	{
439	m->bd.backup();
440	m->bd->controllerType = aControllerType;
441
442	alock.release();
443	AutoWriteLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); // m->pParent is const, needs no locking
444	m->pParent->i_setModified(Machine::IsModified_Storage);
445	mlock.release();
446
447	m->pParent->i_onStorageControllerChange(m->pParent->i_getId(), m->bd->strName);
448	}
449
450	return S_OK;
451	}
452
453	HRESULT StorageController::getMaxDevicesPerPortCount(ULONG *aMaxDevicesPerPortCount)
454	{
455	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
456
457	HRESULT rc = m->pSystemProperties->GetMaxDevicesPerPortForStorageBus(m->bd->storageBus, aMaxDevicesPerPortCount);
458
459	return rc;
460	}
461
462	HRESULT StorageController::getMinPortCount(ULONG *aMinPortCount)
463	{
464	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
465
466	HRESULT rc = m->pSystemProperties->GetMinPortCountForStorageBus(m->bd->storageBus, aMinPortCount);
467	return rc;
468	}
469
470	HRESULT StorageController::getMaxPortCount(ULONG *aMaxPortCount)
471	{
472	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
473	HRESULT rc = m->pSystemProperties->GetMaxPortCountForStorageBus(m->bd->storageBus, aMaxPortCount);
474
475	return rc;
476	}
477
478	HRESULT StorageController::getPortCount(ULONG *aPortCount)
479	{
480	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
481
482	*aPortCount = m->bd->ulPortCount;
483
484	return S_OK;
485	}
486
487	HRESULT StorageController::setPortCount(ULONG aPortCount)
488	{
489	/* the machine needs to be mutable */
490	AutoMutableStateDependency adep(m->pParent);
491	if (FAILED(adep.rc())) return adep.rc();
492
493	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
494
495	switch (m->bd->storageBus)
496	{
497	case StorageBus_SATA:
498	{
499	/* AHCI SATA supports a maximum of 30 ports. */
500	if (aPortCount < 1 \|\| aPortCount > 30)
501	return setError(E_INVALIDARG,
502	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
503	aPortCount, 1, 30);
504	break;
505	}
506	case StorageBus_SCSI:
507	{
508	/*
509	* SCSI does not support setting different ports.
510	* (doesn't make sense here either).
511	* The maximum and minimum is 16 and unless the callee
512	* tries to set a different value we return an error.
513	*/
514	if (aPortCount != 16)
515	return setError(E_INVALIDARG,
516	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
517	aPortCount, 16, 16);
518	break;
519	}
520	case StorageBus_IDE:
521	{
522	/*
523	* The port count is fixed to 2.
524	*/
525	if (aPortCount != 2)
526	return setError(E_INVALIDARG,
527	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
528	aPortCount, 2, 2);
529	break;
530	}
531	case StorageBus_Floppy:
532	{
533	/*
534	* The port count is fixed to 1.
535	*/
536	if (aPortCount != 1)
537	return setError(E_INVALIDARG,
538	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
539	aPortCount, 1, 1);
540	break;
541	}
542	case StorageBus_SAS:
543	{
544	/* SAS supports a maximum of 255 ports. */
545	if (aPortCount < 1 \|\| aPortCount > 255)
546	return setError(E_INVALIDARG,
547	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
548	aPortCount, 1, 255);
549	break;
550	}
551	case StorageBus_USB:
552	{
553	/*
554	* The port count is fixed to 8.
555	*/
556	if (aPortCount != 8)
557	return setError(E_INVALIDARG,
558	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
559	aPortCount, 8, 8);
560	break;
561	}
562	case StorageBus_PCIe:
563	{
564	/*
565	* PCIe (NVMe in particular) supports theoretically 2^32 - 1
566	* different namespaces, limit the amount artifically here.
567	*/
568	if (aPortCount < 1 \|\| aPortCount > 255)
569	return setError(E_INVALIDARG,
570	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
571	aPortCount, 1, 255);
572	break;
573	}
574	case StorageBus_VirtioSCSI:
575	{
576	/*
577	* virtio-scsi supports 256 targets (with 16384 LUNs each).
578	*/
579	if (aPortCount < 1 \|\| aPortCount > 256)
580	return setError(E_INVALIDARG,
581	tr("Invalid port count: %lu (must be in range [%lu, %lu])"),
582	aPortCount, 1, 256);
583	break;
584	}
585	default:
586	AssertMsgFailed(("Invalid controller type %d\n", m->bd->storageBus));
587	}
588
589	if (m->bd->ulPortCount != aPortCount)
590	{
591	m->bd.backup();
592	m->bd->ulPortCount = aPortCount;
593
594	alock.release();
595	AutoWriteLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); // m->pParent is const, needs no locking
596	m->pParent->i_setModified(Machine::IsModified_Storage);
597	mlock.release();
598
599	m->pParent->i_onStorageControllerChange(m->pParent->i_getId(), m->bd->strName);
600	}
601
602	return S_OK;
603	}
604
605	HRESULT StorageController::getInstance(ULONG *aInstance)
606	{
607	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
608
609	*aInstance = m->bd->ulInstance;
610
611	return S_OK;
612	}
613
614	HRESULT StorageController::setInstance(ULONG aInstance)
615	{
616	/* the machine needs to be mutable */
617	AutoMutableStateDependency adep(m->pParent);
618	if (FAILED(adep.rc())) return adep.rc();
619
620	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
621
622	if (m->bd->ulInstance != aInstance)
623	{
624	m->bd.backup();
625	m->bd->ulInstance = aInstance;
626
627	alock.release();
628	AutoWriteLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); // m->pParent is const, needs no locking
629	m->pParent->i_setModified(Machine::IsModified_Storage);
630	mlock.release();
631
632	m->pParent->i_onStorageControllerChange(m->pParent->i_getId(), m->bd->strName);
633	}
634
635	return S_OK;
636	}
637
638	HRESULT StorageController::getUseHostIOCache(BOOL *fUseHostIOCache)
639	{
640	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
641
642	*fUseHostIOCache = m->bd->fUseHostIOCache;
643
644	return S_OK;
645	}
646
647	HRESULT StorageController::setUseHostIOCache(BOOL fUseHostIOCache)
648	{
649	/* the machine needs to be mutable */
650	AutoMutableStateDependency adep(m->pParent);
651	if (FAILED(adep.rc())) return adep.rc();
652
653	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
654
655	if (m->bd->fUseHostIOCache != !!fUseHostIOCache)
656	{
657	m->bd.backup();
658	m->bd->fUseHostIOCache = !!fUseHostIOCache;
659
660	alock.release();
661	AutoWriteLock mlock(m->pParent COMMA_LOCKVAL_SRC_POS); // m->pParent is const, needs no locking
662	m->pParent->i_setModified(Machine::IsModified_Storage);
663	mlock.release();
664
665	m->pParent->i_onStorageControllerChange(m->pParent->i_getId(), m->bd->strName);
666	}
667
668	return S_OK;
669	}
670
671	HRESULT StorageController::getBootable(BOOL *fBootable)
672	{
673	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
674
675	*fBootable = m->bd->fBootable;
676
677	return S_OK;
678	}
679
680	// public methods only for internal purposes
681	/////////////////////////////////////////////////////////////////////////////
682
683	const Utf8Str& StorageController::i_getName() const
684	{
685	return m->bd->strName;
686	}
687
688	StorageControllerType_T StorageController::i_getControllerType() const
689	{
690	return m->bd->controllerType;
691	}
692
693	StorageBus_T StorageController::i_getStorageBus() const
694	{
695	return m->bd->storageBus;
696	}
697
698	ULONG StorageController::i_getInstance() const
699	{
700	return m->bd->ulInstance;
701	}
702
703	bool StorageController::i_getBootable() const
704	{
705	return !!m->bd->fBootable;
706	}
707
708	/**
709	* Checks the validity of a port and device number.
710	*
711	* @retval S_OK If the given port and device numbers are within the range
712	* supported by this controller.
713	* @retval E_INVALIDARG If not. Sets an error.
714	* @param aControllerPort Controller port number.
715	* @param aDevice Device number.
716	*/
717	HRESULT StorageController::i_checkPortAndDeviceValid(LONG aControllerPort,
718	LONG aDevice)
719	{
720	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
721
722	ULONG portCount = m->bd->ulPortCount;
723	ULONG devicesPerPort;
724	HRESULT rc = m->pSystemProperties->GetMaxDevicesPerPortForStorageBus(m->bd->storageBus, &devicesPerPort);
725	if (FAILED(rc)) return rc;
726
727	if ( aControllerPort < 0
728	\|\| aControllerPort >= (LONG)portCount
729	\|\| aDevice < 0
730	\|\| aDevice >= (LONG)devicesPerPort
731	)
732	return setError(E_INVALIDARG,
733	tr("The port and/or device parameter are out of range: port=%d (must be in range [0, %d]), device=%d (must be in range [0, %d])"),
734	(int)aControllerPort, (int)portCount-1, (int)aDevice, (int)devicesPerPort-1);
735
736	return S_OK;
737	}
738
739	/** @note Locks objects for writing! */
740	void StorageController::i_setBootable(BOOL fBootable)
741	{
742	AutoCaller autoCaller(this);
743	AssertComRCReturnVoid(autoCaller.rc());
744
745	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
746
747	m->bd.backup();
748	m->bd->fBootable = RT_BOOL(fBootable);
749	}
750
751	/** @note Locks objects for writing! */
752	void StorageController::i_rollback()
753	{
754	AutoCaller autoCaller(this);
755	AssertComRCReturnVoid(autoCaller.rc());
756
757	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
758
759	m->bd.rollback();
760	}
761
762	/**
763	* @note Locks this object for writing, together with the peer object (also
764	* for writing) if there is one.
765	*/
766	void StorageController::i_commit()
767	{
768	/* sanity */
769	AutoCaller autoCaller(this);
770	AssertComRCReturnVoid(autoCaller.rc());
771
772	/* sanity too */
773	AutoCaller peerCaller(m->pPeer);
774	AssertComRCReturnVoid(peerCaller.rc());
775
776	/* lock both for writing since we modify both (m->pPeer is "master" so locked
777	* first) */
778	AutoMultiWriteLock2 alock(m->pPeer, this COMMA_LOCKVAL_SRC_POS);
779
780	if (m->bd.isBackedUp())
781	{
782	m->bd.commit();
783	if (m->pPeer)
784	{
785	// attach new data to the peer and reshare it
786	m->pPeer->m->bd.attach(m->bd);
787	}
788	}
789	}
790
791	/**
792	* Cancels sharing (if any) by making an independent copy of data.
793	* This operation also resets this object's peer to NULL.
794	*
795	* @note Locks this object for writing, together with the peer object
796	* represented by @a aThat (locked for reading).
797	*/
798	void StorageController::i_unshare()
799	{
800	/* sanity */
801	AutoCaller autoCaller(this);
802	AssertComRCReturnVoid(autoCaller.rc());
803
804	/* sanity too */
805	AutoCaller peerCaller(m->pPeer);
806	AssertComRCReturnVoid(peerCaller.rc());
807
808	/* peer is not modified, lock it for reading (m->pPeer is "master" so locked
809	* first) */
810	AutoReadLock rl(m->pPeer COMMA_LOCKVAL_SRC_POS);
811	AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
812
813	if (m->bd.isShared())
814	{
815	if (!m->bd.isBackedUp())
816	m->bd.backup();
817
818	m->bd.commit();
819	}
820
821	unconst(m->pPeer) = NULL;
822	}
823
824	Machine* StorageController::i_getMachine()
825	{
826	return m->pParent;
827	}
828
829	ComObjPtr<StorageController> StorageController::i_getPeer()
830	{
831	return m->pPeer;
832	}
833
834	// private methods
835	/////////////////////////////////////////////////////////////////////////////
836
837
838	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-server/StorageControllerImpl.cpp@ 86186

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