USBProxyService.cpp@ 34377

Last change on this file since 34377 was 33595, checked in by vboxsync, 14 years ago
src/*: more spelling fixes (logging), thanks Timeless!
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1	/* $Id: USBProxyService.cpp 33595 2010-10-29 10:35:00Z vboxsync $ */
2	/** @file
3	* VirtualBox USB Proxy Service (base) class.
4	*/
5
6	/*
7	* Copyright (C) 2006-2007 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	#include "USBProxyService.h"
19	#include "HostUSBDeviceImpl.h"
20	#include "HostImpl.h"
21	#include "MachineImpl.h"
22	#include "VirtualBoxImpl.h"
23
24	#include "AutoCaller.h"
25	#include "Logging.h"
26
27	#include <VBox/err.h>
28	#include <iprt/asm.h>
29	#include <iprt/semaphore.h>
30	#include <iprt/thread.h>
31	#include <iprt/mem.h>
32	#include <iprt/string.h>
33
34
35	/**
36	* Initialize data members.
37	*/
38	USBProxyService::USBProxyService(Host *aHost)
39	: mHost(aHost), mThread(NIL_RTTHREAD), mTerminate(false), mLastError(VINF_SUCCESS), mDevices()
40	{
41	LogFlowThisFunc(("aHost=%p\n", aHost));
42	}
43
44
45	/**
46	* Initialize the object.
47	*
48	* Child classes should override and call this method
49	*
50	* @returns S_OK on success, or COM error status on fatal error.
51	*/
52	HRESULT USBProxyService::init(void)
53	{
54	return S_OK;
55	}
56
57
58	/**
59	* Empty destructor.
60	*/
61	USBProxyService::~USBProxyService()
62	{
63	LogFlowThisFunc(("\n"));
64	Assert(mThread == NIL_RTTHREAD);
65	mDevices.clear();
66	mTerminate = true;
67	mHost = NULL;
68	}
69
70
71	/**
72	* Query if the service is active and working.
73	*
74	* @returns true if the service is up running.
75	* @returns false if the service isn't running.
76	*/
77	bool USBProxyService::isActive(void)
78	{
79	return mThread != NIL_RTTHREAD;
80	}
81
82
83	/**
84	* Get last error.
85	* Can be used to check why the proxy !isActive() upon construction.
86	*
87	* @returns VBox status code.
88	*/
89	int USBProxyService::getLastError(void)
90	{
91	return mLastError;
92	}
93
94
95	/**
96	* Get last error message.
97	* Can be used to check why the proxy !isActive() upon construction as an
98	* extension to getLastError(). May return a NULL error.
99	*
100	* @param
101	* @returns VBox status code.
102	*/
103	HRESULT USBProxyService::getLastErrorMessage(BSTR *aError)
104	{
105	AssertPtrReturn(aError, E_POINTER);
106	mLastErrorMessage.cloneTo(aError);
107	return S_OK;
108	}
109
110
111	/**
112	* We're using the Host object lock.
113	*
114	* This is just a temporary measure until all the USB refactoring is
115	* done, probably... For now it help avoiding deadlocks we don't have
116	* time to fix.
117	*
118	* @returns Lock handle.
119	*/
120	RWLockHandle *USBProxyService::lockHandle() const
121	{
122	return mHost->lockHandle();
123	}
124
125
126	/**
127	* Gets the collection of USB devices, slave of Host::USBDevices.
128	*
129	* This is an interface for the HostImpl::USBDevices property getter.
130	*
131	*
132	* @param aUSBDevices Where to store the pointer to the collection.
133	*
134	* @returns COM status code.
135	*
136	* @remarks The caller must own the write lock of the host object.
137	*/
138	HRESULT USBProxyService::getDeviceCollection(ComSafeArrayOut(IHostUSBDevice *, aUSBDevices))
139	{
140	AssertReturn(isWriteLockOnCurrentThread(), E_FAIL);
141	CheckComArgOutSafeArrayPointerValid(aUSBDevices);
142
143	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
144
145	SafeIfaceArray<IHostUSBDevice> Collection (mDevices);
146	Collection.detachTo(ComSafeArrayOutArg(aUSBDevices));
147
148	return S_OK;
149	}
150
151
152	/**
153	* Request capture of a specific device.
154	*
155	* This is in an interface for SessionMachine::CaptureUSBDevice(), which is
156	* an internal worker used by Console::AttachUSBDevice() from the VM process.
157	*
158	* When the request is completed, SessionMachine::onUSBDeviceAttach() will
159	* be called for the given machine object.
160	*
161	*
162	* @param aMachine The machine to attach the device to.
163	* @param aId The UUID of the USB device to capture and attach.
164	*
165	* @returns COM status code and error info.
166	*
167	* @remarks This method may operate synchronously as well as asynchronously. In the
168	* former case it will temporarily abandon locks because of IPC.
169	*/
170	HRESULT USBProxyService::captureDeviceForVM(SessionMachine *aMachine, IN_GUID aId)
171	{
172	ComAssertRet(aMachine, E_INVALIDARG);
173	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
174
175	/*
176	* Translate the device id into a device object.
177	*/
178	ComObjPtr<HostUSBDevice> pHostDevice = findDeviceById(aId);
179	if (pHostDevice.isNull())
180	return setError(E_INVALIDARG,
181	tr("The USB device with UUID {%RTuuid} is not currently attached to the host"), Guid(aId).raw());
182
183	/*
184	* Try to capture the device
185	*/
186	AutoWriteLock DevLock(pHostDevice COMMA_LOCKVAL_SRC_POS);
187	return pHostDevice->requestCaptureForVM(aMachine, true /* aSetError */);
188	}
189
190
191	/**
192	* Notification from VM process about USB device detaching progress.
193	*
194	* This is in an interface for SessionMachine::DetachUSBDevice(), which is
195	* an internal worker used by Console::DetachUSBDevice() from the VM process.
196	*
197	* @param aMachine The machine which is sending the notification.
198	* @param aId The UUID of the USB device is concerns.
199	* @param aDone \a false for the pre-action notification (necessary
200	* for advancing the device state to avoid confusing
201	* the guest).
202	* \a true for the post-action notification. The device
203	* will be subjected to all filters except those of
204	* of \a Machine.
205	*
206	* @returns COM status code.
207	*
208	* @remarks When \a aDone is \a true this method may end up doing IPC to other
209	* VMs when running filters. In these cases it will temporarily
210	* abandon its locks.
211	*/
212	HRESULT USBProxyService::detachDeviceFromVM(SessionMachine *aMachine, IN_GUID aId, bool aDone)
213	{
214	LogFlowThisFunc(("aMachine=%p{%s} aId={%RTuuid} aDone=%RTbool\n",
215	aMachine,
216	aMachine->getName().c_str(),
217	Guid(aId).raw(),
218	aDone));
219
220	// get a list of all running machines while we're outside the lock
221	// (getOpenedMachines requests locks which are incompatible with the lock of the machines list)
222	SessionMachinesList llOpenedMachines;
223	mHost->parent()->getOpenedMachines(llOpenedMachines);
224
225	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
226
227	ComObjPtr<HostUSBDevice> pHostDevice = findDeviceById(aId);
228	ComAssertRet(!pHostDevice.isNull(), E_FAIL);
229	AutoWriteLock DevLock(pHostDevice COMMA_LOCKVAL_SRC_POS);
230
231	/*
232	* Work the state machine.
233	*/
234	LogFlowThisFunc(("id={%RTuuid} state=%s aDone=%RTbool name={%s}\n",
235	pHostDevice->getId().raw(), pHostDevice->getStateName(), aDone, pHostDevice->getName().c_str()));
236	bool fRunFilters = false;
237	HRESULT hrc = pHostDevice->onDetachFromVM(aMachine, aDone, &fRunFilters);
238
239	/*
240	* Run filters if necessary.
241	*/
242	if ( SUCCEEDED(hrc)
243	&& fRunFilters)
244	{
245	Assert(aDone && pHostDevice->getUnistate() == kHostUSBDeviceState_HeldByProxy && pHostDevice->getMachine().isNull());
246	HRESULT hrc2 = runAllFiltersOnDevice(pHostDevice, llOpenedMachines, aMachine);
247	ComAssertComRC(hrc2);
248	}
249	return hrc;
250	}
251
252
253	/**
254	* Apply filters for the machine to all eligible USB devices.
255	*
256	* This is in an interface for SessionMachine::CaptureUSBDevice(), which
257	* is an internal worker used by Console::AutoCaptureUSBDevices() from the
258	* VM process at VM startup.
259	*
260	* Matching devices will be attached to the VM and may result IPC back
261	* to the VM process via SessionMachine::onUSBDeviceAttach() depending
262	* on whether the device needs to be captured or not. If capture is
263	* required, SessionMachine::onUSBDeviceAttach() will be called
264	* asynchronously by the USB proxy service thread.
265	*
266	* @param aMachine The machine to capture devices for.
267	*
268	* @returns COM status code, perhaps with error info.
269	*
270	* @remarks Write locks the host object and may temporarily abandon
271	* its locks to perform IPC.
272	*/
273	HRESULT USBProxyService::autoCaptureDevicesForVM(SessionMachine *aMachine)
274	{
275	LogFlowThisFunc(("aMachine=%p{%s}\n",
276	aMachine,
277	aMachine->getName().c_str()));
278	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
279	AutoWriteLock mlock(aMachine COMMA_LOCKVAL_SRC_POS);
280
281	/*
282	* Make a copy of the list because we might have to exit and
283	* re-enter the lock protecting it. (This will not make copies
284	* of any HostUSBDevice objects, only reference them.)
285	*/
286	HostUSBDeviceList ListCopy = mDevices;
287
288	for (HostUSBDeviceList::iterator it = ListCopy.begin();
289	it != ListCopy.end();
290	++it)
291	{
292	ComObjPtr<HostUSBDevice> device = *it;
293	AutoWriteLock devLock(device COMMA_LOCKVAL_SRC_POS);
294	if ( device->getUnistate() == kHostUSBDeviceState_HeldByProxy
295	\|\| device->getUnistate() == kHostUSBDeviceState_Unused
296	\|\| device->getUnistate() == kHostUSBDeviceState_Capturable)
297	runMachineFilters(aMachine, device);
298	}
299
300	return S_OK;
301	}
302
303
304	/**
305	* Detach all USB devices currently attached to a VM.
306	*
307	* This is in an interface for SessionMachine::DetachAllUSBDevices(), which
308	* is an internal worker used by Console::powerDown() from the VM process
309	* at VM startup, and SessionMachine::uninit() at VM abend.
310	*
311	* This is, like #detachDeviceFromVM(), normally a two stage journey
312	* where \a aDone indicates where we are. In addition we may be called
313	* to clean up VMs that have abended, in which case there will be no
314	* preparatory call. Filters will be applied to the devices in the final
315	* call with the risk that we have to do some IPC when attaching them
316	* to other VMs.
317	*
318	* @param aMachine The machine to detach devices from.
319	*
320	* @returns COM status code, perhaps with error info.
321	*
322	* @remarks Write locks the host object and may temporarily abandon
323	* its locks to perform IPC.
324	*/
325	HRESULT USBProxyService::detachAllDevicesFromVM(SessionMachine *aMachine, bool aDone, bool aAbnormal)
326	{
327	// get a list of all running machines while we're outside the lock
328	// (getOpenedMachines requests locks which are incompatible with the lock of the machines list)
329	SessionMachinesList llOpenedMachines;
330	mHost->parent()->getOpenedMachines(llOpenedMachines);
331
332	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
333
334	/*
335	* Make a copy of the device list (not the HostUSBDevice objects, just
336	* the list) since we may end up performing IPC and temporarily have
337	* to abandon locks when applying filters.
338	*/
339	HostUSBDeviceList ListCopy = mDevices;
340
341	for (HostUSBDeviceList::iterator It = ListCopy.begin();
342	It != ListCopy.end();
343	++It)
344	{
345	ComObjPtr<HostUSBDevice> pHostDevice = *It;
346	AutoWriteLock devLock(pHostDevice COMMA_LOCKVAL_SRC_POS);
347	if (pHostDevice->getMachine() == aMachine)
348	{
349	/*
350	* Same procedure as in detachUSBDevice().
351	*/
352	bool fRunFilters = false;
353	HRESULT hrc = pHostDevice->onDetachFromVM(aMachine, aDone, &fRunFilters, aAbnormal);
354	if ( SUCCEEDED(hrc)
355	&& fRunFilters)
356	{
357	Assert(aDone && pHostDevice->getUnistate() == kHostUSBDeviceState_HeldByProxy && pHostDevice->getMachine().isNull());
358	HRESULT hrc2 = runAllFiltersOnDevice(pHostDevice, llOpenedMachines, aMachine);
359	ComAssertComRC(hrc2);
360	}
361	}
362	}
363
364	return S_OK;
365	}
366
367
368	/**
369	* Runs all the filters on the specified device.
370	*
371	* All filters mean global and active VM, with the exception of those
372	* belonging to \a aMachine. If a global ignore filter matched or if
373	* none of the filters matched, the device will be released back to
374	* the host.
375	*
376	* The device calling us here will be in the HeldByProxy, Unused, or
377	* Capturable state. The caller is aware that locks held might have
378	* to be abandond because of IPC and that the device might be in
379	* almost any state upon return.
380	*
381	*
382	* @returns COM status code (only parameter & state checks will fail).
383	* @param aDevice The USB device to apply filters to.
384	* @param aIgnoreMachine The machine to ignore filters from (we've just
385	* detached the device from this machine).
386	*
387	* @note The caller is expected to own both the device and Host write locks,
388	* and be prepared that these locks may be abandond temporarily.
389	*/
390	HRESULT USBProxyService::runAllFiltersOnDevice(ComObjPtr<HostUSBDevice> &aDevice,
391	SessionMachinesList &llOpenedMachines,
392	SessionMachine *aIgnoreMachine)
393	{
394	LogFlowThisFunc(("{%s} ignoring=%p\n", aDevice->getName().c_str(), aIgnoreMachine));
395
396	/*
397	* Verify preconditions.
398	*/
399	AssertReturn(isWriteLockOnCurrentThread(), E_FAIL);
400	AssertReturn(aDevice->isWriteLockOnCurrentThread(), E_FAIL);
401	AssertMsgReturn(aDevice->isCapturableOrHeld(), ("{%s} %s\n", aDevice->getName().c_str(), aDevice->getStateName()), E_FAIL);
402
403	/*
404	* Get the lists we'll iterate.
405	*/
406	Host::USBDeviceFilterList globalFilters;
407
408	mHost->getUSBFilters(&globalFilters);
409
410	/*
411	* Run global filters filerts first.
412	*/
413	bool fHoldIt = false;
414	for (Host::USBDeviceFilterList::const_iterator it = globalFilters.begin();
415	it != globalFilters.end();
416	++it)
417	{
418	AutoWriteLock filterLock(*it COMMA_LOCKVAL_SRC_POS);
419	const HostUSBDeviceFilter::Data &data = (*it)->getData();
420	if (aDevice->isMatch(data))
421	{
422	USBDeviceFilterAction_T action = USBDeviceFilterAction_Null;
423	(*it)->COMGETTER(Action)(&action);
424	if (action == USBDeviceFilterAction_Ignore)
425	{
426	/*
427	* Release the device to the host and we're done.
428	*/
429	aDevice->requestReleaseToHost();
430	return S_OK;
431	}
432	if (action == USBDeviceFilterAction_Hold)
433	{
434	/*
435	* A device held by the proxy needs to be subjected
436	* to the machine filters.
437	*/
438	fHoldIt = true;
439	break;
440	}
441	AssertMsgFailed(("action=%d\n", action));
442	}
443	}
444	globalFilters.clear();
445
446	/*
447	* Run the per-machine filters.
448	*/
449	for (SessionMachinesList::const_iterator it = llOpenedMachines.begin();
450	it != llOpenedMachines.end();
451	++it)
452	{
453	ComObjPtr<SessionMachine> pMachine = *it;
454
455	/* Skip the machine the device was just detached from. */
456	if ( aIgnoreMachine
457	&& pMachine == aIgnoreMachine)
458	continue;
459
460	/* runMachineFilters takes care of checking the machine state. */
461	if (runMachineFilters(pMachine, aDevice))
462	{
463	LogFlowThisFunc(("{%s} attached to %p\n", aDevice->getName().c_str(), (void *)pMachine));
464	return S_OK;
465	}
466	}
467
468	/*
469	* No matching machine, so request hold or release depending
470	* on global filter match.
471	*/
472	if (fHoldIt)
473	aDevice->requestHold();
474	else
475	aDevice->requestReleaseToHost();
476	return S_OK;
477	}
478
479
480	/**
481	* Runs the USB filters of the machine on the device.
482	*
483	* If a match is found we will request capture for VM. This may cause
484	* us to temporary abandon locks while doing IPC.
485	*
486	* @param aMachine Machine whose filters are to be run.
487	* @param aDevice The USB device in question.
488	* @returns @c true if the device has been or is being attached to the VM, @c false otherwise.
489	*
490	* @note Caller must own the USB and device locks for writing.
491	* @note Locks aMachine for reading.
492	*/
493	bool USBProxyService::runMachineFilters(SessionMachine *aMachine, ComObjPtr<HostUSBDevice> &aDevice)
494	{
495	LogFlowThisFunc(("{%s} aMachine=%p \n", aDevice->getName().c_str(), aMachine));
496
497	/*
498	* Validate preconditions.
499	*/
500	AssertReturn(aMachine, false);
501	AssertReturn(isWriteLockOnCurrentThread(), false);
502	AssertReturn(aDevice->isWriteLockOnCurrentThread(), false);
503	/* Let HostUSBDevice::requestCaptureToVM() validate the state. */
504
505	/*
506	* Do the job.
507	*/
508	ULONG ulMaskedIfs;
509	if (aMachine->hasMatchingUSBFilter(aDevice, &ulMaskedIfs))
510	{
511	/* try to capture the device */
512	HRESULT hrc = aDevice->requestCaptureForVM(aMachine, false /* aSetError */, ulMaskedIfs);
513	return SUCCEEDED(hrc)
514	\|\| hrc == E_UNEXPECTED /* bad device state, give up */;
515	}
516
517	return false;
518	}
519
520
521	/**
522	* A filter was inserted / loaded.
523	*
524	* @param aFilter Pointer to the inserted filter.
525	* @return ID of the inserted filter
526	*/
527	void *USBProxyService::insertFilter(PCUSBFILTER aFilter)
528	{
529	// return non-NULL to fake success.
530	NOREF(aFilter);
531	return (void *)1;
532	}
533
534
535	/**
536	* A filter was removed.
537	*
538	* @param aId ID of the filter to remove
539	*/
540	void USBProxyService::removeFilter(void *aId)
541	{
542	NOREF(aId);
543	}
544
545
546	/**
547	* A VM is trying to capture a device, do necessary preparations.
548	*
549	* @returns VBox status code.
550	* @param aDevice The device in question.
551	*/
552	int USBProxyService::captureDevice(HostUSBDevice *aDevice)
553	{
554	NOREF(aDevice);
555	return VERR_NOT_IMPLEMENTED;
556	}
557
558
559	/**
560	* Notification that an async captureDevice() operation completed.
561	*
562	* This is used by the proxy to release temporary filters.
563	*
564	* @returns VBox status code.
565	* @param aDevice The device in question.
566	* @param aSuccess Whether it succeeded or failed.
567	*/
568	void USBProxyService::captureDeviceCompleted(HostUSBDevice *aDevice, bool aSuccess)
569	{
570	NOREF(aDevice);
571	NOREF(aSuccess);
572	}
573
574
575	/**
576	* The device is going to be detached from a VM.
577	*
578	* @param aDevice The device in question.
579	*/
580	void USBProxyService::detachingDevice(HostUSBDevice *aDevice)
581	{
582	NOREF(aDevice);
583	}
584
585
586	/**
587	* A VM is releasing a device back to the host.
588	*
589	* @returns VBox status code.
590	* @param aDevice The device in question.
591	*/
592	int USBProxyService::releaseDevice(HostUSBDevice *aDevice)
593	{
594	NOREF(aDevice);
595	return VERR_NOT_IMPLEMENTED;
596	}
597
598
599	/**
600	* Notification that an async releaseDevice() operation completed.
601	*
602	* This is used by the proxy to release temporary filters.
603	*
604	* @returns VBox status code.
605	* @param aDevice The device in question.
606	* @param aSuccess Whether it succeeded or failed.
607	*/
608	void USBProxyService::releaseDeviceCompleted(HostUSBDevice *aDevice, bool aSuccess)
609	{
610	NOREF(aDevice);
611	NOREF(aSuccess);
612	}
613
614
615	// Internals
616	/////////////////////////////////////////////////////////////////////////////
617
618
619	/**
620	* Starts the service.
621	*
622	* @returns VBox status.
623	*/
624	int USBProxyService::start(void)
625	{
626	int rc = VINF_SUCCESS;
627	if (mThread == NIL_RTTHREAD)
628	{
629	/*
630	* Force update before starting the poller thread.
631	*/
632	rc = wait(0);
633	if (rc == VERR_TIMEOUT \|\| rc == VERR_INTERRUPTED \|\| RT_SUCCESS(rc))
634	{
635	processChanges();
636
637	/*
638	* Create the poller thread which will look for changes.
639	*/
640	mTerminate = false;
641	rc = RTThreadCreate(&mThread, USBProxyService::serviceThread, this,
642	0, RTTHREADTYPE_INFREQUENT_POLLER, RTTHREADFLAGS_WAITABLE, "USBPROXY");
643	AssertRC(rc);
644	if (RT_SUCCESS(rc))
645	LogFlowThisFunc(("started mThread=%RTthrd\n", mThread));
646	else
647	mThread = NIL_RTTHREAD;
648	}
649	mLastError = rc;
650	}
651	else
652	LogFlowThisFunc(("already running, mThread=%RTthrd\n", mThread));
653	return rc;
654	}
655
656
657	/**
658	* Stops the service.
659	*
660	* @returns VBox status.
661	*/
662	int USBProxyService::stop(void)
663	{
664	int rc = VINF_SUCCESS;
665	if (mThread != NIL_RTTHREAD)
666	{
667	/*
668	* Mark the thread for termination and kick it.
669	*/
670	ASMAtomicXchgSize(&mTerminate, true);
671	rc = interruptWait();
672	AssertRC(rc);
673
674	/*
675	* Wait for the thread to finish and then update the state.
676	*/
677	rc = RTThreadWait(mThread, 60000, NULL);
678	if (rc == VERR_INVALID_HANDLE)
679	rc = VINF_SUCCESS;
680	if (RT_SUCCESS(rc))
681	{
682	LogFlowThisFunc(("stopped mThread=%RTthrd\n", mThread));
683	mThread = NIL_RTTHREAD;
684	mTerminate = false;
685	}
686	else
687	{
688	AssertRC(rc);
689	mLastError = rc;
690	}
691	}
692	else
693	LogFlowThisFunc(("not active\n"));
694
695	return rc;
696	}
697
698
699	/**
700	* The service thread created by start().
701	*
702	* @param Thread The thread handle.
703	* @param pvUser Pointer to the USBProxyService instance.
704	*/
705	/static/ DECLCALLBACK(int) USBProxyService::serviceThread(RTTHREAD /* Thread /, void pvUser)
706	{
707	USBProxyService pThis = (USBProxyService )pvUser;
708	LogFlowFunc(("pThis=%p\n", pThis));
709	pThis->serviceThreadInit();
710	int rc = VINF_SUCCESS;
711
712	/*
713	* Processing loop.
714	*/
715	for (;;)
716	{
717	rc = pThis->wait(RT_INDEFINITE_WAIT);
718	if (RT_FAILURE(rc) && rc != VERR_INTERRUPTED && rc != VERR_TIMEOUT)
719	break;
720	if (pThis->mTerminate)
721	break;
722	pThis->processChanges();
723	}
724
725	pThis->serviceThreadTerm();
726	LogFlowFunc(("returns %Rrc\n", rc));
727	return rc;
728	}
729
730
731	/**
732	* First call made on the service thread, use it to do
733	* thread initialization.
734	*
735	* The default implementation in USBProxyService just a dummy stub.
736	*/
737	void USBProxyService::serviceThreadInit(void)
738	{
739	}
740
741
742	/**
743	* Last call made on the service thread, use it to do
744	* thread termination.
745	*/
746	void USBProxyService::serviceThreadTerm(void)
747	{
748	}
749
750
751	/**
752	* Wait for a change in the USB devices attached to the host.
753	*
754	* The default implementation in USBProxyService just a dummy stub.
755	*
756	* @returns VBox status code. VERR_INTERRUPTED and VERR_TIMEOUT are considered
757	* harmless, while all other error status are fatal.
758	* @param aMillies Number of milliseconds to wait.
759	*/
760	int USBProxyService::wait(RTMSINTERVAL aMillies)
761	{
762	return RTThreadSleep(RT_MIN(aMillies, 250));
763	}
764
765
766	/**
767	* Interrupt any wait() call in progress.
768	*
769	* The default implementation in USBProxyService just a dummy stub.
770	*
771	* @returns VBox status.
772	*/
773	int USBProxyService::interruptWait(void)
774	{
775	return VERR_NOT_IMPLEMENTED;
776	}
777
778
779	/**
780	* Sort a list of USB devices.
781	*
782	* @returns Pointer to the head of the sorted doubly linked list.
783	* @param aDevices Head pointer (can be both singly and doubly linked list).
784	*/
785	static PUSBDEVICE sortDevices(PUSBDEVICE pDevices)
786	{
787	PUSBDEVICE pHead = NULL;
788	PUSBDEVICE pTail = NULL;
789	while (pDevices)
790	{
791	/* unlink head */
792	PUSBDEVICE pDev = pDevices;
793	pDevices = pDev->pNext;
794	if (pDevices)
795	pDevices->pPrev = NULL;
796
797	/* find location. */
798	PUSBDEVICE pCur = pTail;
799	while ( pCur
800	&& HostUSBDevice::compare(pCur, pDev) > 0)
801	pCur = pCur->pPrev;
802
803	/* insert (after pCur) */
804	pDev->pPrev = pCur;
805	if (pCur)
806	{
807	pDev->pNext = pCur->pNext;
808	pCur->pNext = pDev;
809	if (pDev->pNext)
810	pDev->pNext->pPrev = pDev;
811	else
812	pTail = pDev;
813	}
814	else
815	{
816	pDev->pNext = pHead;
817	if (pHead)
818	pHead->pPrev = pDev;
819	else
820	pTail = pDev;
821	pHead = pDev;
822	}
823	}
824
825	return pHead;
826	}
827
828
829	/**
830	* Process any relevant changes in the attached USB devices.
831	*
832	* Except for the first call, this is always running on the service thread.
833	*/
834	void USBProxyService::processChanges(void)
835	{
836	LogFlowThisFunc(("\n"));
837
838	/*
839	* Get the sorted list of USB devices.
840	*/
841	PUSBDEVICE pDevices = getDevices();
842	pDevices = sortDevices(pDevices);
843
844	// get a list of all running machines while we're outside the lock
845	// (getOpenedMachines requests locks which are incompatible with the lock of the machines list)
846	SessionMachinesList llOpenedMachines;
847	mHost->parent()->getOpenedMachines(llOpenedMachines);
848
849	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
850
851	/*
852	* Compare previous list with the previous list of devices
853	* and merge in any changes while notifying Host.
854	*/
855	HostUSBDeviceList::iterator It = this->mDevices.begin();
856	while ( It != mDevices.end()
857	\|\| pDevices)
858	{
859	ComObjPtr<HostUSBDevice> pHostDevice;
860
861	if (It != mDevices.end())
862	pHostDevice = *It;
863
864	/*
865	* Assert that the object is still alive (we still reference it in
866	* the collection and we're the only one who calls uninit() on it.
867	*/
868	AutoCaller devCaller(pHostDevice.isNull() ? NULL : pHostDevice);
869	AssertComRC(devCaller.rc());
870
871	/*
872	* Lock the device object since we will read/write its
873	* properties. All Host callbacks also imply the object is locked.
874	*/
875	AutoWriteLock devLock(pHostDevice.isNull() ? NULL : pHostDevice
876	COMMA_LOCKVAL_SRC_POS);
877
878	/*
879	* Compare.
880	*/
881	int iDiff;
882	if (pHostDevice.isNull())
883	iDiff = 1;
884	else
885	{
886	if (!pDevices)
887	iDiff = -1;
888	else
889	iDiff = pHostDevice->compare(pDevices);
890	}
891	if (!iDiff)
892	{
893	/*
894	* The device still there, update the state and move on. The PUSBDEVICE
895	* structure is eaten by updateDeviceState / HostUSBDevice::updateState().
896	*/
897	PUSBDEVICE pCur = pDevices;
898	pDevices = pDevices->pNext;
899	pCur->pPrev = pCur->pNext = NULL;
900
901	bool fRunFilters = false;
902	SessionMachine *pIgnoreMachine = NULL;
903	if (updateDeviceState(pHostDevice, pCur, &fRunFilters, &pIgnoreMachine))
904	deviceChanged(pHostDevice,
905	(fRunFilters ? &llOpenedMachines : NULL),
906	pIgnoreMachine);
907	It++;
908	}
909	else
910	{
911	if (iDiff > 0)
912	{
913	/*
914	* Head of pDevices was attached.
915	*/
916	PUSBDEVICE pNew = pDevices;
917	pDevices = pDevices->pNext;
918	pNew->pPrev = pNew->pNext = NULL;
919
920	ComObjPtr<HostUSBDevice> NewObj;
921	NewObj.createObject();
922	NewObj->init(pNew, this);
923	Log(("USBProxyService::processChanges: attached %p {%s} %s / %p:{.idVendor=%#06x, .idProduct=%#06x, .pszProduct=\"%s\", .pszManufacturer=\"%s\"}\n",
924	(HostUSBDevice *)NewObj,
925	NewObj->getName().c_str(),
926	NewObj->getStateName(),
927	pNew,
928	pNew->idVendor,
929	pNew->idProduct,
930	pNew->pszProduct,
931	pNew->pszManufacturer));
932
933	mDevices.insert(It, NewObj);
934
935	/* Not really necessary to lock here, but make Assert checks happy. */
936	AutoWriteLock newDevLock(NewObj COMMA_LOCKVAL_SRC_POS);
937	deviceAdded(NewObj, llOpenedMachines, pNew);
938	}
939	else
940	{
941	/*
942	* Check if the device was actually detached or logically detached
943	* as the result of a re-enumeration.
944	*/
945	if (!pHostDevice->wasActuallyDetached())
946	It++;
947	else
948	{
949	It = mDevices.erase(It);
950	deviceRemoved(pHostDevice);
951	Log(("USBProxyService::processChanges: detached %p {%s}\n",
952	(HostUSBDevice *)pHostDevice,
953	pHostDevice->getName().c_str()));
954
955	/* from now on, the object is no more valid,
956	* uninitialize to avoid abuse */
957	devCaller.release();
958	pHostDevice->uninit();
959	}
960	}
961	}
962	} /* while */
963
964	LogFlowThisFunc(("returns void\n"));
965	}
966
967
968	/**
969	* Get a list of USB device currently attached to the host.
970	*
971	* The default implementation in USBProxyService just a dummy stub.
972	*
973	* @returns Pointer to a list of USB devices.
974	* The list nodes are freed individually by calling freeDevice().
975	*/
976	PUSBDEVICE USBProxyService::getDevices(void)
977	{
978	return NULL;
979	}
980
981
982	/**
983	* Performs the required actions when a device has been added.
984	*
985	* This means things like running filters and subsequent capturing and
986	* VM attaching. This may result in IPC and temporary lock abandonment.
987	*
988	* @param aDevice The device in question.
989	* @param aUSBDevice The USB device structure.
990	*/
991	void USBProxyService::deviceAdded(ComObjPtr<HostUSBDevice> &aDevice,
992	SessionMachinesList &llOpenedMachines,
993	PUSBDEVICE aUSBDevice)
994	{
995	/*
996	* Validate preconditions.
997	*/
998	AssertReturnVoid(isWriteLockOnCurrentThread());
999	AssertReturnVoid(aDevice->isWriteLockOnCurrentThread());
1000	LogFlowThisFunc(("aDevice=%p name={%s} state=%s id={%RTuuid}\n",
1001	(HostUSBDevice *)aDevice,
1002	aDevice->getName().c_str(),
1003	aDevice->getStateName(),
1004	aDevice->getId().raw()));
1005
1006	/*
1007	* Run filters on the device.
1008	*/
1009	if (aDevice->isCapturableOrHeld())
1010	{
1011	HRESULT rc = runAllFiltersOnDevice(aDevice, llOpenedMachines, NULL /* aIgnoreMachine */);
1012	AssertComRC(rc);
1013	}
1014
1015	NOREF(aUSBDevice);
1016	}
1017
1018
1019	/**
1020	* Remove device notification hook for the OS specific code.
1021	*
1022	* This is means things like
1023	*
1024	* @param aDevice The device in question.
1025	*/
1026	void USBProxyService::deviceRemoved(ComObjPtr<HostUSBDevice> &aDevice)
1027	{
1028	/*
1029	* Validate preconditions.
1030	*/
1031	AssertReturnVoid(isWriteLockOnCurrentThread());
1032	AssertReturnVoid(aDevice->isWriteLockOnCurrentThread());
1033	LogFlowThisFunc(("aDevice=%p name={%s} state=%s id={%RTuuid}\n",
1034	(HostUSBDevice *)aDevice,
1035	aDevice->getName().c_str(),
1036	aDevice->getStateName(),
1037	aDevice->getId().raw()));
1038
1039	/*
1040	* Detach the device from any machine currently using it,
1041	* reset all data and uninitialize the device object.
1042	*/
1043	aDevice->onPhysicalDetached();
1044	}
1045
1046
1047	/**
1048	* Implement fake capture, ++.
1049	*
1050	* @returns true if there is a state change.
1051	* @param pDevice The device in question.
1052	* @param pUSBDevice The USB device structure for the last enumeration.
1053	* @param aRunFilters Whether or not to run filters.
1054	*/
1055	bool USBProxyService::updateDeviceStateFake(HostUSBDevice aDevice, PUSBDEVICE aUSBDevice, bool aRunFilters, SessionMachine **aIgnoreMachine)
1056	{
1057	*aRunFilters = false;
1058	*aIgnoreMachine = NULL;
1059	AssertReturn(aDevice, false);
1060	AssertReturn(aDevice->isWriteLockOnCurrentThread(), false);
1061
1062	/*
1063	* Just hand it to the device, it knows best what needs to be done.
1064	*/
1065	return aDevice->updateStateFake(aUSBDevice, aRunFilters, aIgnoreMachine);
1066	}
1067
1068
1069	/**
1070	* Updates the device state.
1071	*
1072	* This is responsible for calling HostUSBDevice::updateState().
1073	*
1074	* @returns true if there is a state change.
1075	* @param aDevice The device in question.
1076	* @param aUSBDevice The USB device structure for the last enumeration.
1077	* @param aRunFilters Whether or not to run filters.
1078	* @param aIgnoreMachine Machine to ignore when running filters.
1079	*/
1080	bool USBProxyService::updateDeviceState(HostUSBDevice aDevice, PUSBDEVICE aUSBDevice, bool aRunFilters, SessionMachine **aIgnoreMachine)
1081	{
1082	AssertReturn(aDevice, false);
1083	AssertReturn(aDevice->isWriteLockOnCurrentThread(), false);
1084
1085	return aDevice->updateState(aUSBDevice, aRunFilters, aIgnoreMachine);
1086	}
1087
1088
1089	/**
1090	* Handle a device which state changed in some significant way.
1091	*
1092	* This means things like running filters and subsequent capturing and
1093	* VM attaching. This may result in IPC and temporary lock abandonment.
1094	*
1095	* @param aDevice The device.
1096	* @param pllOpenedMachines list of running session machines (VirtualBox::getOpenedMachines()); if NULL, we don't run filters
1097	* @param aIgnoreMachine Machine to ignore when running filters.
1098	*/
1099	void USBProxyService::deviceChanged(ComObjPtr<HostUSBDevice> &aDevice, SessionMachinesList pllOpenedMachines, SessionMachine aIgnoreMachine)
1100	{
1101	/*
1102	* Validate preconditions.
1103	*/
1104	AssertReturnVoid(isWriteLockOnCurrentThread());
1105	AssertReturnVoid(aDevice->isWriteLockOnCurrentThread());
1106	LogFlowThisFunc(("aDevice=%p name={%s} state=%s id={%RTuuid} aRunFilters=%RTbool aIgnoreMachine=%p\n",
1107	(HostUSBDevice *)aDevice,
1108	aDevice->getName().c_str(),
1109	aDevice->getStateName(),
1110	aDevice->getId().raw(),
1111	(pllOpenedMachines != NULL), // used to be "bool aRunFilters"
1112	aIgnoreMachine));
1113
1114	/*
1115	* Run filters if requested to do so.
1116	*/
1117	if (pllOpenedMachines)
1118	{
1119	HRESULT rc = runAllFiltersOnDevice(aDevice, *pllOpenedMachines, aIgnoreMachine);
1120	AssertComRC(rc);
1121	}
1122	}
1123
1124
1125
1126	/**
1127	* Free all the members of a USB device returned by getDevice().
1128	*
1129	* @param pDevice Pointer to the device.
1130	*/
1131	/static/ void
1132	USBProxyService::freeDeviceMembers(PUSBDEVICE pDevice)
1133	{
1134	RTStrFree((char *)pDevice->pszManufacturer);
1135	pDevice->pszManufacturer = NULL;
1136	RTStrFree((char *)pDevice->pszProduct);
1137	pDevice->pszProduct = NULL;
1138	RTStrFree((char *)pDevice->pszSerialNumber);
1139	pDevice->pszSerialNumber = NULL;
1140
1141	RTStrFree((char *)pDevice->pszAddress);
1142	pDevice->pszAddress = NULL;
1143	#ifdef RT_OS_WINDOWS
1144	RTStrFree(pDevice->pszAltAddress);
1145	pDevice->pszAltAddress = NULL;
1146	RTStrFree(pDevice->pszHubName);
1147	pDevice->pszHubName = NULL;
1148	#elif defined(RT_OS_SOLARIS)
1149	RTStrFree(pDevice->pszDevicePath);
1150	pDevice->pszDevicePath = NULL;
1151	#endif
1152	}
1153
1154
1155	/**
1156	* Free one USB device returned by getDevice().
1157	*
1158	* @param pDevice Pointer to the device.
1159	*/
1160	/static/ void
1161	USBProxyService::freeDevice(PUSBDEVICE pDevice)
1162	{
1163	freeDeviceMembers(pDevice);
1164	RTMemFree(pDevice);
1165	}
1166
1167
1168	/**
1169	* Initializes a filter with the data from the specified device.
1170	*
1171	* @param aFilter The filter to fill.
1172	* @param aDevice The device to fill it with.
1173	*/
1174	/static/ void
1175	USBProxyService::initFilterFromDevice(PUSBFILTER aFilter, HostUSBDevice *aDevice)
1176	{
1177	PCUSBDEVICE pDev = aDevice->mUsb;
1178	int vrc;
1179
1180	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_VENDOR_ID, pDev->idVendor, true); AssertRC(vrc);
1181	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_PRODUCT_ID, pDev->idProduct, true); AssertRC(vrc);
1182	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_DEVICE_REV, pDev->bcdDevice, true); AssertRC(vrc);
1183	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_DEVICE_CLASS, pDev->bDeviceClass, true); AssertRC(vrc);
1184	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_DEVICE_SUB_CLASS, pDev->bDeviceSubClass, true); AssertRC(vrc);
1185	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_DEVICE_PROTOCOL, pDev->bDeviceProtocol, true); AssertRC(vrc);
1186	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_PORT, pDev->bPort, true); AssertRC(vrc);
1187	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_BUS, pDev->bBus, true); AssertRC(vrc);
1188	if (pDev->pszSerialNumber)
1189	{
1190	vrc = USBFilterSetStringExact(aFilter, USBFILTERIDX_SERIAL_NUMBER_STR, pDev->pszSerialNumber, true);
1191	AssertRC(vrc);
1192	}
1193	if (pDev->pszProduct)
1194	{
1195	vrc = USBFilterSetStringExact(aFilter, USBFILTERIDX_PRODUCT_STR, pDev->pszProduct, true);
1196	AssertRC(vrc);
1197	}
1198	if (pDev->pszManufacturer)
1199	{
1200	vrc = USBFilterSetStringExact(aFilter, USBFILTERIDX_MANUFACTURER_STR, pDev->pszManufacturer, true);
1201	AssertRC(vrc);
1202	}
1203	}
1204
1205
1206	/**
1207	* Searches the list of devices (mDevices) for the given device.
1208	*
1209	*
1210	* @returns Smart pointer to the device on success, NULL otherwise.
1211	* @param aId The UUID of the device we're looking for.
1212	*/
1213	ComObjPtr<HostUSBDevice> USBProxyService::findDeviceById(IN_GUID aId)
1214	{
1215	Guid Id(aId);
1216	ComObjPtr<HostUSBDevice> Dev;
1217	for (HostUSBDeviceList::iterator It = mDevices.begin();
1218	It != mDevices.end();
1219	++It)
1220	if ((*It)->getId() == Id)
1221	{
1222	Dev = (*It);
1223	break;
1224	}
1225
1226	return Dev;
1227	}
1228
1229	/static/
1230	HRESULT USBProxyService::setError(HRESULT aResultCode, const char *aText, ...)
1231	{
1232	va_list va;
1233	va_start(va, aText);
1234	HRESULT rc = VirtualBoxBase::setErrorInternal(aResultCode,
1235	COM_IIDOF(IHost),
1236	"USBProxyService",
1237	Utf8StrFmt(aText, va),
1238	false /* aWarning*/,
1239	true /* aLogIt*/);
1240	va_end(va);
1241	return rc;
1242	}
1243
1244	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/USBProxyService.cpp@ 34377

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