USBProxyService.cpp@ 48817

Last change on this file since 48817 was 41528, checked in by vboxsync, 13 years ago
Main/HostUSBDevice(all platforms)+USBProxyService: redo USB locking, fixes major regression, added lots of assertions to catch locking flaws early, whitespace cleanup Main/Machine: small USB locking fix to be consistent with the remaining code Main/Host+glue/AutoLock: replace USB list lock by host lock, small numbering cleanup Main/Console: redo USB locking, do less in USB callbacks/EMT (addresses long standing todo items), eliminate unsafe iterator parameters
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File size: 37.7 KB

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1	/* $Id: USBProxyService.cpp 41528 2012-05-31 16:48:33Z vboxsync $ */
2	/** @file
3	* VirtualBox USB Proxy Service (base) class.
4	*/
5
6	/*
7	* Copyright (C) 2006-2012 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/com/array.h>
28	#include <VBox/err.h>
29	#include <iprt/asm.h>
30	#include <iprt/semaphore.h>
31	#include <iprt/thread.h>
32	#include <iprt/mem.h>
33	#include <iprt/string.h>
34
35
36	/**
37	* Initialize data members.
38	*/
39	USBProxyService::USBProxyService(Host *aHost)
40	: mHost(aHost), mThread(NIL_RTTHREAD), mTerminate(false), mLastError(VINF_SUCCESS), mDevices()
41	{
42	LogFlowThisFunc(("aHost=%p\n", aHost));
43	}
44
45
46	/**
47	* Stub needed as long as the class isn't virtual
48	*/
49	HRESULT USBProxyService::init(void)
50	{
51	return S_OK;
52	}
53
54
55	/**
56	* Empty destructor.
57	*/
58	USBProxyService::~USBProxyService()
59	{
60	LogFlowThisFunc(("\n"));
61	Assert(mThread == NIL_RTTHREAD);
62	mDevices.clear();
63	mTerminate = true;
64	mHost = NULL;
65	}
66
67
68	/**
69	* Query if the service is active and working.
70	*
71	* @returns true if the service is up running.
72	* @returns false if the service isn't running.
73	*/
74	bool USBProxyService::isActive(void)
75	{
76	return mThread != NIL_RTTHREAD;
77	}
78
79
80	/**
81	* Get last error.
82	* Can be used to check why the proxy !isActive() upon construction.
83	*
84	* @returns VBox status code.
85	*/
86	int USBProxyService::getLastError(void)
87	{
88	return mLastError;
89	}
90
91
92	/**
93	* Get last error message.
94	* Can be used to check why the proxy !isActive() upon construction as an
95	* extension to getLastError(). May return a NULL error.
96	*
97	* @param
98	* @returns VBox status code.
99	*/
100	HRESULT USBProxyService::getLastErrorMessage(BSTR *aError)
101	{
102	AssertPtrReturn(aError, E_POINTER);
103	mLastErrorMessage.cloneTo(aError);
104	return S_OK;
105	}
106
107
108	/**
109	* We're using the Host object lock.
110	*
111	* This is just a temporary measure until all the USB refactoring is
112	* done, probably... For now it help avoiding deadlocks we don't have
113	* time to fix.
114	*
115	* @returns Lock handle.
116	*/
117	RWLockHandle *USBProxyService::lockHandle() const
118	{
119	return mHost->lockHandle();
120	}
121
122
123	/**
124	* Gets the collection of USB devices, slave of Host::USBDevices.
125	*
126	* This is an interface for the HostImpl::USBDevices property getter.
127	*
128	*
129	* @param aUSBDevices Where to store the pointer to the collection.
130	*
131	* @returns COM status code.
132	*
133	* @remarks The caller must own the write lock of the host object.
134	*/
135	HRESULT USBProxyService::getDeviceCollection(ComSafeArrayOut(IHostUSBDevice *, aUSBDevices))
136	{
137	AssertReturn(isWriteLockOnCurrentThread(), E_FAIL);
138	CheckComArgOutSafeArrayPointerValid(aUSBDevices);
139
140	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
141
142	SafeIfaceArray<IHostUSBDevice> Collection(mDevices);
143	Collection.detachTo(ComSafeArrayOutArg(aUSBDevices));
144
145	return S_OK;
146	}
147
148
149	/**
150	* Request capture of a specific device.
151	*
152	* This is in an interface for SessionMachine::CaptureUSBDevice(), which is
153	* an internal worker used by Console::AttachUSBDevice() from the VM process.
154	*
155	* When the request is completed, SessionMachine::onUSBDeviceAttach() will
156	* be called for the given machine object.
157	*
158	*
159	* @param aMachine The machine to attach the device to.
160	* @param aId The UUID of the USB device to capture and attach.
161	*
162	* @returns COM status code and error info.
163	*
164	* @remarks This method may operate synchronously as well as asynchronously. In the
165	* former case it will temporarily abandon locks because of IPC.
166	*/
167	HRESULT USBProxyService::captureDeviceForVM(SessionMachine *aMachine, IN_GUID aId)
168	{
169	ComAssertRet(aMachine, E_INVALIDARG);
170	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
171
172	/*
173	* Translate the device id into a device object.
174	*/
175	ComObjPtr<HostUSBDevice> pHostDevice = findDeviceById(aId);
176	if (pHostDevice.isNull())
177	return setError(E_INVALIDARG,
178	tr("The USB device with UUID {%RTuuid} is not currently attached to the host"), Guid(aId).raw());
179
180	/*
181	* Try to capture the device
182	*/
183	alock.release();
184	return pHostDevice->requestCaptureForVM(aMachine, true /* aSetError */);
185	}
186
187
188	/**
189	* Notification from VM process about USB device detaching progress.
190	*
191	* This is in an interface for SessionMachine::DetachUSBDevice(), which is
192	* an internal worker used by Console::DetachUSBDevice() from the VM process.
193	*
194	* @param aMachine The machine which is sending the notification.
195	* @param aId The UUID of the USB device is concerns.
196	* @param aDone \a false for the pre-action notification (necessary
197	* for advancing the device state to avoid confusing
198	* the guest).
199	* \a true for the post-action notification. The device
200	* will be subjected to all filters except those of
201	* of \a Machine.
202	*
203	* @returns COM status code.
204	*
205	* @remarks When \a aDone is \a true this method may end up doing IPC to other
206	* VMs when running filters. In these cases it will temporarily
207	* abandon its locks.
208	*/
209	HRESULT USBProxyService::detachDeviceFromVM(SessionMachine *aMachine, IN_GUID aId, bool aDone)
210	{
211	LogFlowThisFunc(("aMachine=%p{%s} aId={%RTuuid} aDone=%RTbool\n",
212	aMachine,
213	aMachine->getName().c_str(),
214	Guid(aId).raw(),
215	aDone));
216
217	// get a list of all running machines while we're outside the lock
218	// (getOpenedMachines requests locks which are incompatible with the lock of the machines list)
219	SessionMachinesList llOpenedMachines;
220	mHost->parent()->getOpenedMachines(llOpenedMachines);
221
222	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
223
224	ComObjPtr<HostUSBDevice> pHostDevice = findDeviceById(aId);
225	ComAssertRet(!pHostDevice.isNull(), E_FAIL);
226	AutoWriteLock devLock(pHostDevice COMMA_LOCKVAL_SRC_POS);
227
228	/*
229	* Work the state machine.
230	*/
231	LogFlowThisFunc(("id={%RTuuid} state=%s aDone=%RTbool name={%s}\n",
232	pHostDevice->getId().raw(), pHostDevice->getStateName(), aDone, pHostDevice->getName().c_str()));
233	bool fRunFilters = false;
234	HRESULT hrc = pHostDevice->onDetachFromVM(aMachine, aDone, &fRunFilters);
235
236	/*
237	* Run filters if necessary.
238	*/
239	if ( SUCCEEDED(hrc)
240	&& fRunFilters)
241	{
242	Assert(aDone && pHostDevice->getUnistate() == kHostUSBDeviceState_HeldByProxy && pHostDevice->getMachine().isNull());
243	devLock.release();
244	alock.release();
245	HRESULT hrc2 = runAllFiltersOnDevice(pHostDevice, llOpenedMachines, aMachine);
246	ComAssertComRC(hrc2);
247	}
248	return hrc;
249	}
250
251
252	/**
253	* Apply filters for the machine to all eligible USB devices.
254	*
255	* This is in an interface for SessionMachine::CaptureUSBDevice(), which
256	* is an internal worker used by Console::AutoCaptureUSBDevices() from the
257	* VM process at VM startup.
258	*
259	* Matching devices will be attached to the VM and may result IPC back
260	* to the VM process via SessionMachine::onUSBDeviceAttach() depending
261	* on whether the device needs to be captured or not. If capture is
262	* required, SessionMachine::onUSBDeviceAttach() will be called
263	* asynchronously by the USB proxy service thread.
264	*
265	* @param aMachine The machine to capture devices for.
266	*
267	* @returns COM status code, perhaps with error info.
268	*
269	* @remarks Temporarily locks this object, the machine object and some USB
270	* device, and the called methods will lock similar objects.
271	*/
272	HRESULT USBProxyService::autoCaptureDevicesForVM(SessionMachine *aMachine)
273	{
274	LogFlowThisFunc(("aMachine=%p{%s}\n",
275	aMachine,
276	aMachine->getName().c_str()));
277
278	/*
279	* Make a copy of the list because we cannot hold the lock protecting it.
280	* (This will not make copies of any HostUSBDevice objects, only reference them.)
281	*/
282	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
283	HostUSBDeviceList ListCopy = mDevices;
284	alock.release();
285
286	for (HostUSBDeviceList::iterator it = ListCopy.begin();
287	it != ListCopy.end();
288	++it)
289	{
290	ComObjPtr<HostUSBDevice> device = *it;
291	AutoReadLock devLock(device COMMA_LOCKVAL_SRC_POS);
292	if ( device->getUnistate() == kHostUSBDeviceState_HeldByProxy
293	\|\| device->getUnistate() == kHostUSBDeviceState_Unused
294	\|\| device->getUnistate() == kHostUSBDeviceState_Capturable)
295	{
296	devLock.release();
297	runMachineFilters(aMachine, device);
298	}
299	}
300
301	return S_OK;
302	}
303
304
305	/**
306	* Detach all USB devices currently attached to a VM.
307	*
308	* This is in an interface for SessionMachine::DetachAllUSBDevices(), which
309	* is an internal worker used by Console::powerDown() from the VM process
310	* at VM startup, and SessionMachine::uninit() at VM abend.
311	*
312	* This is, like #detachDeviceFromVM(), normally a two stage journey
313	* where \a aDone indicates where we are. In addition we may be called
314	* to clean up VMs that have abended, in which case there will be no
315	* preparatory call. Filters will be applied to the devices in the final
316	* call with the risk that we have to do some IPC when attaching them
317	* to other VMs.
318	*
319	* @param aMachine The machine to detach devices from.
320	*
321	* @returns COM status code, perhaps with error info.
322	*
323	* @remarks Write locks the host object and may temporarily abandon
324	* its locks to perform IPC.
325	*/
326	HRESULT USBProxyService::detachAllDevicesFromVM(SessionMachine *aMachine, bool aDone, bool aAbnormal)
327	{
328	// get a list of all running machines while we're outside the lock
329	// (getOpenedMachines requests locks which are incompatible with the host object lock)
330	SessionMachinesList llOpenedMachines;
331	mHost->parent()->getOpenedMachines(llOpenedMachines);
332
333	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
334
335	/*
336	* Make a copy of the device list (not the HostUSBDevice objects, just
337	* the list) since we may end up performing IPC and temporarily have
338	* to abandon locks when applying filters.
339	*/
340	HostUSBDeviceList ListCopy = mDevices;
341
342	for (HostUSBDeviceList::iterator it = ListCopy.begin();
343	it != ListCopy.end();
344	++it)
345	{
346	ComObjPtr<HostUSBDevice> pHostDevice = *it;
347	AutoWriteLock devLock(pHostDevice COMMA_LOCKVAL_SRC_POS);
348	if (pHostDevice->getMachine() == aMachine)
349	{
350	/*
351	* Same procedure as in detachUSBDevice().
352	*/
353	bool fRunFilters = false;
354	HRESULT hrc = pHostDevice->onDetachFromVM(aMachine, aDone, &fRunFilters, aAbnormal);
355	if ( SUCCEEDED(hrc)
356	&& fRunFilters)
357	{
358	Assert(aDone && pHostDevice->getUnistate() == kHostUSBDeviceState_HeldByProxy && pHostDevice->getMachine().isNull());
359	devLock.release();
360	alock.release();
361	HRESULT hrc2 = runAllFiltersOnDevice(pHostDevice, llOpenedMachines, aMachine);
362	ComAssertComRC(hrc2);
363	alock.acquire();
364	}
365	}
366	}
367
368	return S_OK;
369	}
370
371
372	/**
373	* Runs all the filters on the specified device.
374	*
375	* All filters mean global and active VM, with the exception of those
376	* belonging to \a aMachine. If a global ignore filter matched or if
377	* none of the filters matched, the device will be released back to
378	* the host.
379	*
380	* The device calling us here will be in the HeldByProxy, Unused, or
381	* Capturable state. The caller is aware that locks held might have
382	* to be abandond because of IPC and that the device might be in
383	* almost any state upon return.
384	*
385	*
386	* @returns COM status code (only parameter & state checks will fail).
387	* @param aDevice The USB device to apply filters to.
388	* @param aIgnoreMachine The machine to ignore filters from (we've just
389	* detached the device from this machine).
390	*
391	* @note The caller is expected to own no locks.
392	*/
393	HRESULT USBProxyService::runAllFiltersOnDevice(ComObjPtr<HostUSBDevice> &aDevice,
394	SessionMachinesList &llOpenedMachines,
395	SessionMachine *aIgnoreMachine)
396	{
397	LogFlowThisFunc(("{%s} ignoring=%p\n", aDevice->getName().c_str(), aIgnoreMachine));
398
399	/*
400	* Verify preconditions.
401	*/
402	AssertReturn(!isWriteLockOnCurrentThread(), E_FAIL);
403	AssertReturn(!aDevice->isWriteLockOnCurrentThread(), E_FAIL);
404	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
405	AutoWriteLock devLock(aDevice COMMA_LOCKVAL_SRC_POS);
406	AssertMsgReturn(aDevice->isCapturableOrHeld(), ("{%s} %s\n", aDevice->getName().c_str(), aDevice->getStateName()), E_FAIL);
407
408	/*
409	* Get the lists we'll iterate.
410	*/
411	Host::USBDeviceFilterList globalFilters;
412
413	mHost->getUSBFilters(&globalFilters);
414
415	/*
416	* Run global filters filters first.
417	*/
418	bool fHoldIt = false;
419	for (Host::USBDeviceFilterList::const_iterator it = globalFilters.begin();
420	it != globalFilters.end();
421	++it)
422	{
423	AutoWriteLock filterLock(*it COMMA_LOCKVAL_SRC_POS);
424	const HostUSBDeviceFilter::Data &data = (*it)->getData();
425	if (aDevice->isMatch(data))
426	{
427	USBDeviceFilterAction_T action = USBDeviceFilterAction_Null;
428	(*it)->COMGETTER(Action)(&action);
429	if (action == USBDeviceFilterAction_Ignore)
430	{
431	/*
432	* Release the device to the host and we're done.
433	*/
434	filterLock.release();
435	devLock.release();
436	alock.release();
437	aDevice->requestReleaseToHost();
438	return S_OK;
439	}
440	if (action == USBDeviceFilterAction_Hold)
441	{
442	/*
443	* A device held by the proxy needs to be subjected
444	* to the machine filters.
445	*/
446	fHoldIt = true;
447	break;
448	}
449	AssertMsgFailed(("action=%d\n", action));
450	}
451	}
452	globalFilters.clear();
453
454	/*
455	* Run the per-machine filters.
456	*/
457	for (SessionMachinesList::const_iterator it = llOpenedMachines.begin();
458	it != llOpenedMachines.end();
459	++it)
460	{
461	ComObjPtr<SessionMachine> pMachine = *it;
462
463	/* Skip the machine the device was just detached from. */
464	if ( aIgnoreMachine
465	&& pMachine == aIgnoreMachine)
466	continue;
467
468	/* runMachineFilters takes care of checking the machine state. */
469	devLock.release();
470	alock.release();
471	if (runMachineFilters(pMachine, aDevice))
472	{
473	LogFlowThisFunc(("{%s} attached to %p\n", aDevice->getName().c_str(), (void *)pMachine));
474	return S_OK;
475	}
476	alock.acquire();
477	devLock.acquire();
478	}
479
480	/*
481	* No matching machine, so request hold or release depending
482	* on global filter match.
483	*/
484	devLock.release();
485	alock.release();
486	if (fHoldIt)
487	aDevice->requestHold();
488	else
489	aDevice->requestReleaseToHost();
490	return S_OK;
491	}
492
493
494	/**
495	* Runs the USB filters of the machine on the device.
496	*
497	* If a match is found we will request capture for VM. This may cause
498	* us to temporary abandon locks while doing IPC.
499	*
500	* @param aMachine Machine whose filters are to be run.
501	* @param aDevice The USB device in question.
502	* @returns @c true if the device has been or is being attached to the VM, @c false otherwise.
503	*
504	* @note Locks several objects temporarily for reading or writing.
505	*/
506	bool USBProxyService::runMachineFilters(SessionMachine *aMachine, ComObjPtr<HostUSBDevice> &aDevice)
507	{
508	LogFlowThisFunc(("{%s} aMachine=%p \n", aDevice->getName().c_str(), aMachine));
509
510	/*
511	* Validate preconditions.
512	*/
513	AssertReturn(aMachine, false);
514	AssertReturn(!isWriteLockOnCurrentThread(), false);
515	AssertReturn(!aMachine->isWriteLockOnCurrentThread(), false);
516	AssertReturn(!aDevice->isWriteLockOnCurrentThread(), false);
517	/* Let HostUSBDevice::requestCaptureToVM() validate the state. */
518
519	/*
520	* Do the job.
521	*/
522	ULONG ulMaskedIfs;
523	if (aMachine->hasMatchingUSBFilter(aDevice, &ulMaskedIfs))
524	{
525	/* try to capture the device */
526	HRESULT hrc = aDevice->requestCaptureForVM(aMachine, false /* aSetError */, ulMaskedIfs);
527	return SUCCEEDED(hrc)
528	\|\| hrc == E_UNEXPECTED /* bad device state, give up */;
529	}
530
531	return false;
532	}
533
534
535	/**
536	* A filter was inserted / loaded.
537	*
538	* @param aFilter Pointer to the inserted filter.
539	* @return ID of the inserted filter
540	*/
541	void *USBProxyService::insertFilter(PCUSBFILTER aFilter)
542	{
543	// return non-NULL to fake success.
544	NOREF(aFilter);
545	return (void *)1;
546	}
547
548
549	/**
550	* A filter was removed.
551	*
552	* @param aId ID of the filter to remove
553	*/
554	void USBProxyService::removeFilter(void *aId)
555	{
556	NOREF(aId);
557	}
558
559
560	/**
561	* A VM is trying to capture a device, do necessary preparations.
562	*
563	* @returns VBox status code.
564	* @param aDevice The device in question.
565	*/
566	int USBProxyService::captureDevice(HostUSBDevice *aDevice)
567	{
568	NOREF(aDevice);
569	return VERR_NOT_IMPLEMENTED;
570	}
571
572
573	/**
574	* Notification that an async captureDevice() operation completed.
575	*
576	* This is used by the proxy to release temporary filters.
577	*
578	* @returns VBox status code.
579	* @param aDevice The device in question.
580	* @param aSuccess Whether it succeeded or failed.
581	*/
582	void USBProxyService::captureDeviceCompleted(HostUSBDevice *aDevice, bool aSuccess)
583	{
584	NOREF(aDevice);
585	NOREF(aSuccess);
586	}
587
588
589	/**
590	* The device is going to be detached from a VM.
591	*
592	* @param aDevice The device in question.
593	*
594	* @todo unused
595	*/
596	void USBProxyService::detachingDevice(HostUSBDevice *aDevice)
597	{
598	NOREF(aDevice);
599	}
600
601
602	/**
603	* A VM is releasing a device back to the host.
604	*
605	* @returns VBox status code.
606	* @param aDevice The device in question.
607	*/
608	int USBProxyService::releaseDevice(HostUSBDevice *aDevice)
609	{
610	NOREF(aDevice);
611	return VERR_NOT_IMPLEMENTED;
612	}
613
614
615	/**
616	* Notification that an async releaseDevice() operation completed.
617	*
618	* This is used by the proxy to release temporary filters.
619	*
620	* @returns VBox status code.
621	* @param aDevice The device in question.
622	* @param aSuccess Whether it succeeded or failed.
623	*/
624	void USBProxyService::releaseDeviceCompleted(HostUSBDevice *aDevice, bool aSuccess)
625	{
626	NOREF(aDevice);
627	NOREF(aSuccess);
628	}
629
630
631	// Internals
632	/////////////////////////////////////////////////////////////////////////////
633
634
635	/**
636	* Starts the service.
637	*
638	* @returns VBox status.
639	*/
640	int USBProxyService::start(void)
641	{
642	int rc = VINF_SUCCESS;
643	if (mThread == NIL_RTTHREAD)
644	{
645	/*
646	* Force update before starting the poller thread.
647	*/
648	rc = wait(0);
649	if (rc == VERR_TIMEOUT \|\| rc == VERR_INTERRUPTED \|\| RT_SUCCESS(rc))
650	{
651	processChanges();
652
653	/*
654	* Create the poller thread which will look for changes.
655	*/
656	mTerminate = false;
657	rc = RTThreadCreate(&mThread, USBProxyService::serviceThread, this,
658	0, RTTHREADTYPE_INFREQUENT_POLLER, RTTHREADFLAGS_WAITABLE, "USBPROXY");
659	AssertRC(rc);
660	if (RT_SUCCESS(rc))
661	LogFlowThisFunc(("started mThread=%RTthrd\n", mThread));
662	else
663	mThread = NIL_RTTHREAD;
664	}
665	mLastError = rc;
666	}
667	else
668	LogFlowThisFunc(("already running, mThread=%RTthrd\n", mThread));
669	return rc;
670	}
671
672
673	/**
674	* Stops the service.
675	*
676	* @returns VBox status.
677	*/
678	int USBProxyService::stop(void)
679	{
680	int rc = VINF_SUCCESS;
681	if (mThread != NIL_RTTHREAD)
682	{
683	/*
684	* Mark the thread for termination and kick it.
685	*/
686	ASMAtomicXchgSize(&mTerminate, true);
687	rc = interruptWait();
688	AssertRC(rc);
689
690	/*
691	* Wait for the thread to finish and then update the state.
692	*/
693	rc = RTThreadWait(mThread, 60000, NULL);
694	if (rc == VERR_INVALID_HANDLE)
695	rc = VINF_SUCCESS;
696	if (RT_SUCCESS(rc))
697	{
698	LogFlowThisFunc(("stopped mThread=%RTthrd\n", mThread));
699	mThread = NIL_RTTHREAD;
700	mTerminate = false;
701	}
702	else
703	{
704	AssertRC(rc);
705	mLastError = rc;
706	}
707	}
708	else
709	LogFlowThisFunc(("not active\n"));
710
711	return rc;
712	}
713
714
715	/**
716	* The service thread created by start().
717	*
718	* @param Thread The thread handle.
719	* @param pvUser Pointer to the USBProxyService instance.
720	*/
721	/static/ DECLCALLBACK(int) USBProxyService::serviceThread(RTTHREAD /* Thread /, void pvUser)
722	{
723	USBProxyService pThis = (USBProxyService )pvUser;
724	LogFlowFunc(("pThis=%p\n", pThis));
725	pThis->serviceThreadInit();
726	int rc = VINF_SUCCESS;
727
728	/*
729	* Processing loop.
730	*/
731	for (;;)
732	{
733	rc = pThis->wait(RT_INDEFINITE_WAIT);
734	if (RT_FAILURE(rc) && rc != VERR_INTERRUPTED && rc != VERR_TIMEOUT)
735	break;
736	if (pThis->mTerminate)
737	break;
738	pThis->processChanges();
739	}
740
741	pThis->serviceThreadTerm();
742	LogFlowFunc(("returns %Rrc\n", rc));
743	return rc;
744	}
745
746
747	/**
748	* First call made on the service thread, use it to do
749	* thread initialization.
750	*
751	* The default implementation in USBProxyService just a dummy stub.
752	*/
753	void USBProxyService::serviceThreadInit(void)
754	{
755	}
756
757
758	/**
759	* Last call made on the service thread, use it to do
760	* thread termination.
761	*/
762	void USBProxyService::serviceThreadTerm(void)
763	{
764	}
765
766
767	/**
768	* Wait for a change in the USB devices attached to the host.
769	*
770	* The default implementation in USBProxyService just a dummy stub.
771	*
772	* @returns VBox status code. VERR_INTERRUPTED and VERR_TIMEOUT are considered
773	* harmless, while all other error status are fatal.
774	* @param aMillies Number of milliseconds to wait.
775	*/
776	int USBProxyService::wait(RTMSINTERVAL aMillies)
777	{
778	return RTThreadSleep(RT_MIN(aMillies, 250));
779	}
780
781
782	/**
783	* Interrupt any wait() call in progress.
784	*
785	* The default implementation in USBProxyService just a dummy stub.
786	*
787	* @returns VBox status.
788	*/
789	int USBProxyService::interruptWait(void)
790	{
791	return VERR_NOT_IMPLEMENTED;
792	}
793
794
795	/**
796	* Sort a list of USB devices.
797	*
798	* @returns Pointer to the head of the sorted doubly linked list.
799	* @param aDevices Head pointer (can be both singly and doubly linked list).
800	*/
801	static PUSBDEVICE sortDevices(PUSBDEVICE pDevices)
802	{
803	PUSBDEVICE pHead = NULL;
804	PUSBDEVICE pTail = NULL;
805	while (pDevices)
806	{
807	/* unlink head */
808	PUSBDEVICE pDev = pDevices;
809	pDevices = pDev->pNext;
810	if (pDevices)
811	pDevices->pPrev = NULL;
812
813	/* find location. */
814	PUSBDEVICE pCur = pTail;
815	while ( pCur
816	&& HostUSBDevice::compare(pCur, pDev) > 0)
817	pCur = pCur->pPrev;
818
819	/* insert (after pCur) */
820	pDev->pPrev = pCur;
821	if (pCur)
822	{
823	pDev->pNext = pCur->pNext;
824	pCur->pNext = pDev;
825	if (pDev->pNext)
826	pDev->pNext->pPrev = pDev;
827	else
828	pTail = pDev;
829	}
830	else
831	{
832	pDev->pNext = pHead;
833	if (pHead)
834	pHead->pPrev = pDev;
835	else
836	pTail = pDev;
837	pHead = pDev;
838	}
839	}
840
841	LogFlowFuncLeave();
842	return pHead;
843	}
844
845
846	/**
847	* Process any relevant changes in the attached USB devices.
848	*
849	* Except for the first call, this is always running on the service thread.
850	*/
851	void USBProxyService::processChanges(void)
852	{
853	LogFlowThisFunc(("\n"));
854
855	/*
856	* Get the sorted list of USB devices.
857	*/
858	PUSBDEVICE pDevices = getDevices();
859	pDevices = sortDevices(pDevices);
860
861	// get a list of all running machines while we're outside the lock
862	// (getOpenedMachines requests higher priority locks)
863	SessionMachinesList llOpenedMachines;
864	mHost->parent()->getOpenedMachines(llOpenedMachines);
865
866	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
867
868	/*
869	* Compare previous list with the new list of devices
870	* and merge in any changes while notifying Host.
871	*/
872	HostUSBDeviceList::iterator it = this->mDevices.begin();
873	while ( it != mDevices.end()
874	\|\| pDevices)
875	{
876	ComObjPtr<HostUSBDevice> pHostDevice;
877
878	if (it != mDevices.end())
879	pHostDevice = *it;
880
881	/*
882	* Assert that the object is still alive (we still reference it in
883	* the collection and we're the only one who calls uninit() on it.
884	*/
885	AutoCaller devCaller(pHostDevice.isNull() ? NULL : pHostDevice);
886	AssertComRC(devCaller.rc());
887
888	/*
889	* Lock the device object since we will read/write its
890	* properties. All Host callbacks also imply the object is locked.
891	*/
892	AutoWriteLock devLock(pHostDevice.isNull() ? NULL : pHostDevice
893	COMMA_LOCKVAL_SRC_POS);
894
895	/*
896	* Compare.
897	*/
898	int iDiff;
899	if (pHostDevice.isNull())
900	iDiff = 1;
901	else
902	{
903	if (!pDevices)
904	iDiff = -1;
905	else
906	iDiff = pHostDevice->compare(pDevices);
907	}
908	if (!iDiff)
909	{
910	/*
911	* The device still there, update the state and move on. The PUSBDEVICE
912	* structure is eaten by updateDeviceState / HostUSBDevice::updateState().
913	*/
914	PUSBDEVICE pCur = pDevices;
915	pDevices = pDevices->pNext;
916	pCur->pPrev = pCur->pNext = NULL;
917
918	bool fRunFilters = false;
919	SessionMachine *pIgnoreMachine = NULL;
920	devLock.release();
921	alock.release();
922	if (updateDeviceState(pHostDevice, pCur, &fRunFilters, &pIgnoreMachine))
923	deviceChanged(pHostDevice,
924	(fRunFilters ? &llOpenedMachines : NULL),
925	pIgnoreMachine);
926	alock.acquire();
927	it++;
928	}
929	else
930	{
931	if (iDiff > 0)
932	{
933	/*
934	* Head of pDevices was attached.
935	*/
936	PUSBDEVICE pNew = pDevices;
937	pDevices = pDevices->pNext;
938	pNew->pPrev = pNew->pNext = NULL;
939
940	ComObjPtr<HostUSBDevice> NewObj;
941	NewObj.createObject();
942	NewObj->init(pNew, this);
943	Log(("USBProxyService::processChanges: attached %p {%s} %s / %p:{.idVendor=%#06x, .idProduct=%#06x, .pszProduct=\"%s\", .pszManufacturer=\"%s\"}\n",
944	(HostUSBDevice *)NewObj,
945	NewObj->getName().c_str(),
946	NewObj->getStateName(),
947	pNew,
948	pNew->idVendor,
949	pNew->idProduct,
950	pNew->pszProduct,
951	pNew->pszManufacturer));
952
953	mDevices.insert(it, NewObj);
954
955	devLock.release();
956	alock.release();
957	deviceAdded(NewObj, llOpenedMachines, pNew);
958	alock.acquire();
959	}
960	else
961	{
962	/*
963	* Check if the device was actually detached or logically detached
964	* as the result of a re-enumeration.
965	*/
966	if (!pHostDevice->wasActuallyDetached())
967	it++;
968	else
969	{
970	it = mDevices.erase(it);
971	devLock.release();
972	alock.release();
973	deviceRemoved(pHostDevice);
974	Log(("USBProxyService::processChanges: detached %p {%s}\n",
975	(HostUSBDevice *)pHostDevice,
976	pHostDevice->getName().c_str()));
977
978	/* from now on, the object is no more valid,
979	* uninitialize to avoid abuse */
980	devCaller.release();
981	pHostDevice->uninit();
982	alock.acquire();
983	}
984	}
985	}
986	} /* while */
987
988	LogFlowThisFunc(("returns void\n"));
989	}
990
991
992	/**
993	* Get a list of USB device currently attached to the host.
994	*
995	* The default implementation in USBProxyService just a dummy stub.
996	*
997	* @returns Pointer to a list of USB devices.
998	* The list nodes are freed individually by calling freeDevice().
999	*/
1000	PUSBDEVICE USBProxyService::getDevices(void)
1001	{
1002	return NULL;
1003	}
1004
1005
1006	/**
1007	* Performs the required actions when a device has been added.
1008	*
1009	* This means things like running filters and subsequent capturing and
1010	* VM attaching. This may result in IPC and temporary lock abandonment.
1011	*
1012	* @param aDevice The device in question.
1013	* @param aUSBDevice The USB device structure.
1014	*/
1015	void USBProxyService::deviceAdded(ComObjPtr<HostUSBDevice> &aDevice,
1016	SessionMachinesList &llOpenedMachines,
1017	PUSBDEVICE aUSBDevice)
1018	{
1019	/*
1020	* Validate preconditions.
1021	*/
1022	AssertReturnVoid(!isWriteLockOnCurrentThread());
1023	AssertReturnVoid(!aDevice->isWriteLockOnCurrentThread());
1024	AutoReadLock devLock(aDevice COMMA_LOCKVAL_SRC_POS);
1025	LogFlowThisFunc(("aDevice=%p name={%s} state=%s id={%RTuuid}\n",
1026	(HostUSBDevice *)aDevice,
1027	aDevice->getName().c_str(),
1028	aDevice->getStateName(),
1029	aDevice->getId().raw()));
1030
1031	/*
1032	* Run filters on the device.
1033	*/
1034	if (aDevice->isCapturableOrHeld())
1035	{
1036	devLock.release();
1037	HRESULT rc = runAllFiltersOnDevice(aDevice, llOpenedMachines, NULL /* aIgnoreMachine */);
1038	AssertComRC(rc);
1039	}
1040
1041	NOREF(aUSBDevice);
1042	}
1043
1044
1045	/**
1046	* Remove device notification hook for the OS specific code.
1047	*
1048	* This is means things like
1049	*
1050	* @param aDevice The device in question.
1051	*/
1052	void USBProxyService::deviceRemoved(ComObjPtr<HostUSBDevice> &aDevice)
1053	{
1054	/*
1055	* Validate preconditions.
1056	*/
1057	AssertReturnVoid(!isWriteLockOnCurrentThread());
1058	AssertReturnVoid(!aDevice->isWriteLockOnCurrentThread());
1059	AutoWriteLock devLock(aDevice COMMA_LOCKVAL_SRC_POS);
1060	LogFlowThisFunc(("aDevice=%p name={%s} state=%s id={%RTuuid}\n",
1061	(HostUSBDevice *)aDevice,
1062	aDevice->getName().c_str(),
1063	aDevice->getStateName(),
1064	aDevice->getId().raw()));
1065
1066	/*
1067	* Detach the device from any machine currently using it,
1068	* reset all data and uninitialize the device object.
1069	*/
1070	devLock.release();
1071	aDevice->onPhysicalDetached();
1072	}
1073
1074
1075	/**
1076	* Implement fake capture, ++.
1077	*
1078	* @returns true if there is a state change.
1079	* @param pDevice The device in question.
1080	* @param pUSBDevice The USB device structure for the last enumeration.
1081	* @param aRunFilters Whether or not to run filters.
1082	*/
1083	bool USBProxyService::updateDeviceStateFake(HostUSBDevice aDevice, PUSBDEVICE aUSBDevice, bool aRunFilters, SessionMachine **aIgnoreMachine)
1084	{
1085	*aRunFilters = false;
1086	*aIgnoreMachine = NULL;
1087	AssertReturn(aDevice, false);
1088	AssertReturn(!aDevice->isWriteLockOnCurrentThread(), false);
1089
1090	/*
1091	* Just hand it to the device, it knows best what needs to be done.
1092	*/
1093	return aDevice->updateStateFake(aUSBDevice, aRunFilters, aIgnoreMachine);
1094	}
1095
1096
1097	/**
1098	* Updates the device state.
1099	*
1100	* This is responsible for calling HostUSBDevice::updateState().
1101	*
1102	* @returns true if there is a state change.
1103	* @param aDevice The device in question.
1104	* @param aUSBDevice The USB device structure for the last enumeration.
1105	* @param aRunFilters Whether or not to run filters.
1106	* @param aIgnoreMachine Machine to ignore when running filters.
1107	*/
1108	bool USBProxyService::updateDeviceState(HostUSBDevice aDevice, PUSBDEVICE aUSBDevice, bool aRunFilters, SessionMachine **aIgnoreMachine)
1109	{
1110	AssertReturn(aDevice, false);
1111	AssertReturn(!aDevice->isWriteLockOnCurrentThread(), false);
1112
1113	return aDevice->updateState(aUSBDevice, aRunFilters, aIgnoreMachine);
1114	}
1115
1116
1117	/**
1118	* Handle a device which state changed in some significant way.
1119	*
1120	* This means things like running filters and subsequent capturing and
1121	* VM attaching. This may result in IPC and temporary lock abandonment.
1122	*
1123	* @param aDevice The device.
1124	* @param pllOpenedMachines list of running session machines (VirtualBox::getOpenedMachines()); if NULL, we don't run filters
1125	* @param aIgnoreMachine Machine to ignore when running filters.
1126	*/
1127	void USBProxyService::deviceChanged(ComObjPtr<HostUSBDevice> &aDevice, SessionMachinesList pllOpenedMachines, SessionMachine aIgnoreMachine)
1128	{
1129	/*
1130	* Validate preconditions.
1131	*/
1132	AssertReturnVoid(!isWriteLockOnCurrentThread());
1133	AssertReturnVoid(!aDevice->isWriteLockOnCurrentThread());
1134	AutoReadLock devLock(aDevice COMMA_LOCKVAL_SRC_POS);
1135	LogFlowThisFunc(("aDevice=%p name={%s} state=%s id={%RTuuid} aRunFilters=%RTbool aIgnoreMachine=%p\n",
1136	(HostUSBDevice *)aDevice,
1137	aDevice->getName().c_str(),
1138	aDevice->getStateName(),
1139	aDevice->getId().raw(),
1140	(pllOpenedMachines != NULL), // used to be "bool aRunFilters"
1141	aIgnoreMachine));
1142	devLock.release();
1143
1144	/*
1145	* Run filters if requested to do so.
1146	*/
1147	if (pllOpenedMachines)
1148	{
1149	HRESULT rc = runAllFiltersOnDevice(aDevice, *pllOpenedMachines, aIgnoreMachine);
1150	AssertComRC(rc);
1151	}
1152	}
1153
1154
1155
1156	/**
1157	* Free all the members of a USB device returned by getDevice().
1158	*
1159	* @param pDevice Pointer to the device.
1160	*/
1161	/static/ void
1162	USBProxyService::freeDeviceMembers(PUSBDEVICE pDevice)
1163	{
1164	RTStrFree((char *)pDevice->pszManufacturer);
1165	pDevice->pszManufacturer = NULL;
1166	RTStrFree((char *)pDevice->pszProduct);
1167	pDevice->pszProduct = NULL;
1168	RTStrFree((char *)pDevice->pszSerialNumber);
1169	pDevice->pszSerialNumber = NULL;
1170
1171	RTStrFree((char *)pDevice->pszAddress);
1172	pDevice->pszAddress = NULL;
1173	#ifdef RT_OS_WINDOWS
1174	RTStrFree(pDevice->pszAltAddress);
1175	pDevice->pszAltAddress = NULL;
1176	RTStrFree(pDevice->pszHubName);
1177	pDevice->pszHubName = NULL;
1178	#elif defined(RT_OS_SOLARIS)
1179	RTStrFree(pDevice->pszDevicePath);
1180	pDevice->pszDevicePath = NULL;
1181	#endif
1182	}
1183
1184
1185	/**
1186	* Free one USB device returned by getDevice().
1187	*
1188	* @param pDevice Pointer to the device.
1189	*/
1190	/static/ void
1191	USBProxyService::freeDevice(PUSBDEVICE pDevice)
1192	{
1193	freeDeviceMembers(pDevice);
1194	RTMemFree(pDevice);
1195	}
1196
1197
1198	/**
1199	* Initializes a filter with the data from the specified device.
1200	*
1201	* @param aFilter The filter to fill.
1202	* @param aDevice The device to fill it with.
1203	*/
1204	/static/ void
1205	USBProxyService::initFilterFromDevice(PUSBFILTER aFilter, HostUSBDevice *aDevice)
1206	{
1207	PCUSBDEVICE pDev = aDevice->mUsb;
1208	int vrc;
1209
1210	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_VENDOR_ID, pDev->idVendor, true); AssertRC(vrc);
1211	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_PRODUCT_ID, pDev->idProduct, true); AssertRC(vrc);
1212	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_DEVICE_REV, pDev->bcdDevice, true); AssertRC(vrc);
1213	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_DEVICE_CLASS, pDev->bDeviceClass, true); AssertRC(vrc);
1214	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_DEVICE_SUB_CLASS, pDev->bDeviceSubClass, true); AssertRC(vrc);
1215	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_DEVICE_PROTOCOL, pDev->bDeviceProtocol, true); AssertRC(vrc);
1216	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_PORT, pDev->bPort, true); AssertRC(vrc);
1217	vrc = USBFilterSetNumExact(aFilter, USBFILTERIDX_BUS, pDev->bBus, true); AssertRC(vrc);
1218	if (pDev->pszSerialNumber)
1219	{
1220	vrc = USBFilterSetStringExact(aFilter, USBFILTERIDX_SERIAL_NUMBER_STR, pDev->pszSerialNumber, true);
1221	AssertRC(vrc);
1222	}
1223	if (pDev->pszProduct)
1224	{
1225	vrc = USBFilterSetStringExact(aFilter, USBFILTERIDX_PRODUCT_STR, pDev->pszProduct, true);
1226	AssertRC(vrc);
1227	}
1228	if (pDev->pszManufacturer)
1229	{
1230	vrc = USBFilterSetStringExact(aFilter, USBFILTERIDX_MANUFACTURER_STR, pDev->pszManufacturer, true);
1231	AssertRC(vrc);
1232	}
1233	}
1234
1235
1236	/**
1237	* Searches the list of devices (mDevices) for the given device.
1238	*
1239	*
1240	* @returns Smart pointer to the device on success, NULL otherwise.
1241	* @param aId The UUID of the device we're looking for.
1242	*/
1243	ComObjPtr<HostUSBDevice> USBProxyService::findDeviceById(IN_GUID aId)
1244	{
1245	Guid Id(aId);
1246	ComObjPtr<HostUSBDevice> Dev;
1247	for (HostUSBDeviceList::iterator it = mDevices.begin();
1248	it != mDevices.end();
1249	++it)
1250	if ((*it)->getId() == Id)
1251	{
1252	Dev = (*it);
1253	break;
1254	}
1255
1256	return Dev;
1257	}
1258
1259	/static/
1260	HRESULT USBProxyService::setError(HRESULT aResultCode, const char *aText, ...)
1261	{
1262	va_list va;
1263	va_start(va, aText);
1264	HRESULT rc = VirtualBoxBase::setErrorInternal(aResultCode,
1265	COM_IIDOF(IHost),
1266	"USBProxyService",
1267	Utf8StrFmt(aText, va),
1268	false /* aWarning*/,
1269	true /* aLogIt*/);
1270	va_end(va);
1271	return rc;
1272	}
1273
1274	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/src-server/USBProxyService.cpp@ 48817

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