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+/* $Id: USBControllerImpl.cpp $ */
+/** @file
+ * Implementation of IUSBController.
+ */
+
+/*
+ * Copyright (C) 2005-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only
+ */
+
+#define LOG_GROUP LOG_GROUP_MAIN_USBCONTROLLER
+#include "USBControllerImpl.h"
+
+#include "Global.h"
+#include "MachineImpl.h"
+#include "VirtualBoxImpl.h"
+#include "HostImpl.h"
+
+#include <iprt/string.h>
+#include <iprt/cpp/utils.h>
+
+#include <iprt/errcore.h>
+#include <VBox/settings.h>
+#include <VBox/com/array.h>
+
+#include <algorithm>
+
+#include "AutoStateDep.h"
+#include "AutoCaller.h"
+#include "LoggingNew.h"
+
+// defines
+/////////////////////////////////////////////////////////////////////////////
+
+struct USBController::Data
+{
+ Data(Machine *pMachine)
+ : pParent(pMachine)
+ { }
+
+ ~Data()
+ {};
+
+ Machine * const pParent;
+
+ // peer machine's USB controller
+ const ComObjPtr<USBController> pPeer;
+
+ Backupable<settings::USBController> bd;
+};
+
+
+
+// constructor / destructor
+/////////////////////////////////////////////////////////////////////////////
+
+DEFINE_EMPTY_CTOR_DTOR(USBController)
+
+HRESULT USBController::FinalConstruct()
+{
+ return BaseFinalConstruct();
+}
+
+void USBController::FinalRelease()
+{
+ uninit();
+ BaseFinalRelease();
+}
+
+// public initializer/uninitializer for internal purposes only
+/////////////////////////////////////////////////////////////////////////////
+
+/**
+ * Initializes the USB controller object.
+ *
+ * @returns COM result indicator.
+ * @param aParent Pointer to our parent object.
+ * @param aName The name of the USB controller.
+ * @param enmType The USB controller type.
+ */
+HRESULT USBController::init(Machine *aParent, const Utf8Str &aName, USBControllerType_T enmType)
+{
+ LogFlowThisFunc(("aParent=%p aName=\"%s\"\n", aParent, aName.c_str()));
+
+ ComAssertRet(aParent && !aName.isEmpty(), E_INVALIDARG);
+ if ( (enmType <= USBControllerType_Null)
+ || (enmType > USBControllerType_XHCI))
+ return setError(E_INVALIDARG,
+ tr("Invalid USB controller type"));
+
+ /* Enclose the state transition NotReady->InInit->Ready */
+ AutoInitSpan autoInitSpan(this);
+ AssertReturn(autoInitSpan.isOk(), E_FAIL);
+
+ m = new Data(aParent);
+
+ /* mPeer is left null */
+
+ m->bd.allocate();
+ m->bd->strName = aName;
+ m->bd->enmType = enmType;
+
+ /* Confirm a successful initialization */
+ autoInitSpan.setSucceeded();
+
+ return S_OK;
+}
+
+/**
+ * Initializes the USB controller object given another USB controller object
+ * (a kind of copy constructor). This object shares data with
+ * the object passed as an argument.
+ *
+ * @returns COM result indicator.
+ * @param aParent Pointer to our parent object.
+ * @param aPeer The object to share.
+ * @param fReshare
+ * When false, the original object will remain a data owner.
+ * Otherwise, data ownership will be transferred from the original
+ * object to this one.
+ *
+ * @note This object must be destroyed before the original object
+ * it shares data with is destroyed.
+ *
+ * @note Locks @a aThat object for writing if @a aReshare is @c true, or for
+ * reading if @a aReshare is false.
+ */
+HRESULT USBController::init(Machine *aParent, USBController *aPeer,
+ bool fReshare /* = false */)
+{
+ LogFlowThisFunc(("aParent=%p, aPeer=%p, fReshare=%RTbool\n",
+ aParent, aPeer, fReshare));
+
+ ComAssertRet(aParent && aPeer, E_INVALIDARG);
+
+ /* Enclose the state transition NotReady->InInit->Ready */
+ AutoInitSpan autoInitSpan(this);
+ AssertReturn(autoInitSpan.isOk(), E_FAIL);
+
+ m = new Data(aParent);
+
+ /* sanity */
+ AutoCaller peerCaller(aPeer);
+ AssertComRCReturnRC(peerCaller.hrc());
+
+ if (fReshare)
+ {
+ AutoWriteLock peerLock(aPeer COMMA_LOCKVAL_SRC_POS);
+
+ unconst(aPeer->m->pPeer) = this;
+ m->bd.attach(aPeer->m->bd);
+ }
+ else
+ {
+ unconst(m->pPeer) = aPeer;
+
+ AutoReadLock peerLock(aPeer COMMA_LOCKVAL_SRC_POS);
+ m->bd.share(aPeer->m->bd);
+ }
+
+ /* Confirm a successful initialization */
+ autoInitSpan.setSucceeded();
+
+ return S_OK;
+}
+
+
+/**
+ * Initializes the USB controller object given another guest object
+ * (a kind of copy constructor). This object makes a private copy of data
+ * of the original object passed as an argument.
+ */
+HRESULT USBController::initCopy(Machine *aParent, USBController *aPeer)
+{
+ LogFlowThisFunc(("aParent=%p, aPeer=%p\n", aParent, aPeer));
+
+ ComAssertRet(aParent && aPeer, E_INVALIDARG);
+
+ /* Enclose the state transition NotReady->InInit->Ready */
+ AutoInitSpan autoInitSpan(this);
+ AssertReturn(autoInitSpan.isOk(), E_FAIL);
+
+ m = new Data(aParent);
+
+ /* mPeer is left null */
+
+ AutoWriteLock thatlock(aPeer COMMA_LOCKVAL_SRC_POS);
+ m->bd.attachCopy(aPeer->m->bd);
+
+ /* Confirm a successful initialization */
+ autoInitSpan.setSucceeded();
+
+ return S_OK;
+}
+
+
+/**
+ * Uninitializes the instance and sets the ready flag to FALSE.
+ * Called either from FinalRelease() or by the parent when it gets destroyed.
+ */
+void USBController::uninit()
+{
+ LogFlowThisFunc(("\n"));
+
+ /* Enclose the state transition Ready->InUninit->NotReady */
+ AutoUninitSpan autoUninitSpan(this);
+ if (autoUninitSpan.uninitDone())
+ return;
+
+ m->bd.free();
+
+ unconst(m->pPeer) = NULL;
+ unconst(m->pParent) = NULL;
+
+ delete m;
+ m = NULL;
+}
+
+
+// Wrapped IUSBController properties
+/////////////////////////////////////////////////////////////////////////////
+HRESULT USBController::getName(com::Utf8Str &aName)
+{
+ AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+ aName = m->bd->strName;
+
+ return S_OK;
+}
+
+HRESULT USBController::setName(const com::Utf8Str &aName)
+{
+ /* the machine needs to be mutable */
+ AutoMutableStateDependency adep(m->pParent);
+ if (FAILED(adep.hrc())) return adep.hrc();
+
+ AutoMultiWriteLock2 alock(m->pParent, this COMMA_LOCKVAL_SRC_POS);
+
+ if (m->bd->strName != aName)
+ {
+ ComObjPtr<USBController> ctrl;
+ HRESULT hrc = m->pParent->i_getUSBControllerByName(aName, ctrl, false /* aSetError */);
+ if (SUCCEEDED(hrc))
+ return setError(VBOX_E_OBJECT_IN_USE,
+ tr("USB controller named '%s' already exists"),
+ aName.c_str());
+
+ m->bd.backup();
+ m->bd->strName = aName;
+
+ m->pParent->i_setModified(Machine::IsModified_USB);
+ alock.release();
+
+ m->pParent->i_onUSBControllerChange();
+ }
+
+ return S_OK;
+}
+
+HRESULT USBController::getType(USBControllerType_T *aType)
+{
+ AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+ *aType = m->bd->enmType;
+
+ return S_OK;
+}
+
+HRESULT USBController::setType(USBControllerType_T aType)
+{
+ /* the machine needs to be mutable */
+ AutoMutableStateDependency adep(m->pParent);
+ if (FAILED(adep.hrc())) return adep.hrc();
+
+ AutoMultiWriteLock2 alock(m->pParent, this COMMA_LOCKVAL_SRC_POS);
+
+ if (m->bd->enmType != aType)
+ {
+ m->bd.backup();
+ m->bd->enmType = aType;
+
+ m->pParent->i_setModified(Machine::IsModified_USB);
+ alock.release();
+
+ m->pParent->i_onUSBControllerChange();
+ }
+
+ return S_OK;
+}
+
+HRESULT USBController::getUSBStandard(USHORT *aUSBStandard)
+{
+ AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+ switch (m->bd->enmType)
+ {
+ case USBControllerType_OHCI:
+ *aUSBStandard = 0x0101;
+ break;
+ case USBControllerType_EHCI:
+ *aUSBStandard = 0x0200;
+ break;
+ case USBControllerType_XHCI:
+ *aUSBStandard = 0x0200;
+ break;
+ default:
+ AssertMsgFailedReturn(("Invalid controller type %d\n", m->bd->enmType),
+ E_FAIL);
+ }
+
+ return S_OK;
+}
+
+// public methods only for internal purposes
+/////////////////////////////////////////////////////////////////////////////
+
+/** @note Locks objects for writing! */
+void USBController::i_rollback()
+{
+ AutoCaller autoCaller(this);
+ AssertComRCReturnVoid(autoCaller.hrc());
+
+ /* we need the machine state */
+ AutoAnyStateDependency adep(m->pParent);
+ AssertComRCReturnVoid(adep.hrc());
+
+ AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
+
+ m->bd.rollback();
+}
+
+/**
+ * @note Locks this object for writing, together with the peer object (also
+ * for writing) if there is one.
+ */
+void USBController::i_commit()
+{
+ /* sanity */
+ AutoCaller autoCaller(this);
+ AssertComRCReturnVoid(autoCaller.hrc());
+
+ /* sanity too */
+ AutoCaller peerCaller(m->pPeer);
+ AssertComRCReturnVoid(peerCaller.hrc());
+
+ /* lock both for writing since we modify both (mPeer is "master" so locked
+ * first) */
+ AutoMultiWriteLock2 alock(m->pPeer, this COMMA_LOCKVAL_SRC_POS);
+
+ if (m->bd.isBackedUp())
+ {
+ m->bd.commit();
+ if (m->pPeer)
+ {
+ /* attach new data to the peer and reshare it */
+ AutoWriteLock peerlock(m->pPeer COMMA_LOCKVAL_SRC_POS);
+ m->pPeer->m->bd.attach(m->bd);
+ }
+ }
+}
+
+/**
+ * @note Locks this object for writing, together with the peer object
+ * represented by @a aThat (locked for reading).
+ */
+void USBController::i_copyFrom(USBController *aThat)
+{
+ AssertReturnVoid(aThat != NULL);
+
+ /* sanity */
+ AutoCaller autoCaller(this);
+ AssertComRCReturnVoid(autoCaller.hrc());
+
+ /* sanity too */
+ AutoCaller thatCaller(aThat);
+ AssertComRCReturnVoid(thatCaller.hrc());
+
+ /* even more sanity */
+ AutoAnyStateDependency adep(m->pParent);
+ AssertComRCReturnVoid(adep.hrc());
+ /* Machine::copyFrom() may not be called when the VM is running */
+ AssertReturnVoid(!Global::IsOnline(adep.machineState()));
+
+ /* peer is not modified, lock it for reading (aThat is "master" so locked
+ * first) */
+ AutoReadLock rl(aThat COMMA_LOCKVAL_SRC_POS);
+ AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
+
+ /* this will back up current data */
+ m->bd.assignCopy(aThat->m->bd);
+}
+
+/**
+ * Cancels sharing (if any) by making an independent copy of data.
+ * This operation also resets this object's peer to NULL.
+ *
+ * @note Locks this object for writing, together with the peer object
+ * represented by @a aThat (locked for reading).
+ */
+void USBController::i_unshare()
+{
+ /* sanity */
+ AutoCaller autoCaller(this);
+ AssertComRCReturnVoid(autoCaller.hrc());
+
+ /* sanity too */
+ AutoCaller peerCaller(m->pPeer);
+ AssertComRCReturnVoid(peerCaller.hrc());
+
+ /* peer is not modified, lock it for reading (m->pPeer is "master" so locked
+ * first) */
+ AutoReadLock rl(m->pPeer COMMA_LOCKVAL_SRC_POS);
+ AutoWriteLock wl(this COMMA_LOCKVAL_SRC_POS);
+
+ if (m->bd.isShared())
+ {
+ if (!m->bd.isBackedUp())
+ m->bd.backup();
+
+ m->bd.commit();
+ }
+
+ unconst(m->pPeer) = NULL;
+}
+
+const Utf8Str &USBController::i_getName() const
+{
+ return m->bd->strName;
+}
+
+const USBControllerType_T &USBController::i_getControllerType() const
+{
+ return m->bd->enmType;
+}
+
+ComObjPtr<USBController> USBController::i_getPeer()
+{
+ return m->pPeer;
+}
+
+/////////////////////////////////////////////////////////////////////////////
+/* vi: set tabstop=4 shiftwidth=4 expandtab: */