SessionImpl.cpp@ 31907

Last change on this file since 31907 was 31698, checked in by vboxsync, 14 years ago
Main, frontends: unsigned long long -> long long
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File size: 37.6 KB

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1	/* $Id: SessionImpl.cpp 31698 2010-08-16 15:00:05Z vboxsync $ */
2	/** @file
3	* VBox Client Session COM Class implementation in VBoxC.
4	*/
5
6	/*
7	* Copyright (C) 2006-2010 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	#ifdef VBOX_WITH_SYS_V_IPC_SESSION_WATCHER
19	# include <errno.h>
20	# include <sys/types.h>
21	# include <sys/stat.h>
22	# include <sys/ipc.h>
23	# include <sys/sem.h>
24	#endif
25
26	#include "SessionImpl.h"
27	#include "ConsoleImpl.h"
28	#include "Global.h"
29
30	#include "AutoCaller.h"
31	#include "Logging.h"
32
33	#include <VBox/err.h>
34	#include <iprt/process.h>
35
36	#if defined(RT_OS_WINDOWS) \|\| defined (RT_OS_OS2)
37	/** VM IPC mutex holder thread */
38	static DECLCALLBACK(int) IPCMutexHolderThread(RTTHREAD Thread, void *pvUser);
39	#endif
40
41	/**
42	* Local macro to check whether the session is open and return an error if not.
43	* @note Don't forget to do \|Auto[Reader]Lock alock (this);\| before using this
44	* macro.
45	*/
46	#define CHECK_OPEN() \
47	do { \
48	if (mState != SessionState_Locked) \
49	return setError(E_UNEXPECTED, tr ("The session is not locked (session state: %s)"), Global::stringifySessionState(mState)); \
50	} while (0)
51
52	// constructor / destructor
53	/////////////////////////////////////////////////////////////////////////////
54
55	HRESULT Session::FinalConstruct()
56	{
57	LogFlowThisFunc(("\n"));
58
59	return init();
60	}
61
62	void Session::FinalRelease()
63	{
64	LogFlowThisFunc(("\n"));
65
66	uninit();
67	}
68
69	// public initializer/uninitializer for internal purposes only
70	/////////////////////////////////////////////////////////////////////////////
71
72	/**
73	* Initializes the Session object.
74	*/
75	HRESULT Session::init()
76	{
77	/* Enclose the state transition NotReady->InInit->Ready */
78	AutoInitSpan autoInitSpan(this);
79	AssertReturn(autoInitSpan.isOk(), E_FAIL);
80
81	LogFlowThisFuncEnter();
82
83	mState = SessionState_Unlocked;
84	mType = SessionType_Null;
85
86	#if defined(RT_OS_WINDOWS)
87	mIPCSem = NULL;
88	mIPCThreadSem = NULL;
89	#elif defined(RT_OS_OS2)
90	mIPCThread = NIL_RTTHREAD;
91	mIPCThreadSem = NIL_RTSEMEVENT;
92	#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
93	mIPCSem = -1;
94	#else
95	# error "Port me!"
96	#endif
97
98	/* Confirm a successful initialization when it's the case */
99	autoInitSpan.setSucceeded();
100
101	LogFlowThisFuncLeave();
102
103	return S_OK;
104	}
105
106	/**
107	* Uninitializes the Session object.
108	*
109	* @note Locks this object for writing.
110	*/
111	void Session::uninit()
112	{
113	LogFlowThisFuncEnter();
114
115	/* Enclose the state transition Ready->InUninit->NotReady */
116	AutoUninitSpan autoUninitSpan(this);
117	if (autoUninitSpan.uninitDone())
118	{
119	LogFlowThisFunc(("Already uninitialized.\n"));
120	LogFlowThisFuncLeave();
121	return;
122	}
123
124	/* close() needs write lock */
125	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
126
127	if (mState != SessionState_Unlocked)
128	{
129	Assert(mState == SessionState_Locked \|\|
130	mState == SessionState_Spawning);
131
132	HRESULT rc = unlockMachine(true /* aFinalRelease /, false / aFromServer */);
133	AssertComRC(rc);
134	}
135
136	LogFlowThisFuncLeave();
137	}
138
139	// ISession properties
140	/////////////////////////////////////////////////////////////////////////////
141
142	STDMETHODIMP Session::COMGETTER(State)(SessionState_T *aState)
143	{
144	CheckComArgOutPointerValid(aState);
145
146	AutoCaller autoCaller(this);
147	if (FAILED(autoCaller.rc())) return autoCaller.rc();
148
149	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
150
151	*aState = mState;
152
153	return S_OK;
154	}
155
156	STDMETHODIMP Session::COMGETTER(Type)(SessionType_T *aType)
157	{
158	CheckComArgOutPointerValid(aType);
159
160	AutoCaller autoCaller(this);
161	if (FAILED(autoCaller.rc())) return autoCaller.rc();
162
163	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
164
165	CHECK_OPEN();
166
167	*aType = mType;
168	return S_OK;
169	}
170
171	STDMETHODIMP Session::COMGETTER(Machine)(IMachine **aMachine)
172	{
173	CheckComArgOutPointerValid(aMachine);
174
175	AutoCaller autoCaller(this);
176	if (FAILED(autoCaller.rc())) return autoCaller.rc();
177
178	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
179
180	CHECK_OPEN();
181
182	HRESULT rc;
183	if (mConsole)
184	rc = mConsole->machine().queryInterfaceTo(aMachine);
185	else
186	rc = mRemoteMachine.queryInterfaceTo(aMachine);
187	if (FAILED(rc))
188	{
189	/** @todo VBox 3.3: replace E_FAIL with rc here. */
190	if (mConsole)
191	setError(E_FAIL, tr("Failed to query the session machine (%Rhrc)"), rc);
192	else if (FAILED_DEAD_INTERFACE(rc))
193	setError(E_FAIL, tr("Peer process crashed"));
194	else
195	setError(E_FAIL, tr("Failed to query the remote session machine (%Rhrc)"), rc);
196	}
197
198	return rc;
199	}
200
201	STDMETHODIMP Session::COMGETTER(Console)(IConsole **aConsole)
202	{
203	CheckComArgOutPointerValid(aConsole);
204
205	AutoCaller autoCaller(this);
206	if (FAILED(autoCaller.rc())) return autoCaller.rc();
207
208	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
209
210	CHECK_OPEN();
211
212	HRESULT rc;
213	if (mConsole)
214	rc = mConsole.queryInterfaceTo(aConsole);
215	else
216	rc = mRemoteConsole.queryInterfaceTo(aConsole);
217	if (FAILED(rc))
218	{
219	/** @todo VBox 3.3: replace E_FAIL with rc here. */
220	if (mConsole)
221	setError(E_FAIL, tr("Failed to query the console (%Rhrc)"), rc);
222	else if (FAILED_DEAD_INTERFACE(rc))
223	setError(E_FAIL, tr("Peer process crashed"));
224	else
225	setError(E_FAIL, tr("Failed to query the remote console (%Rhrc)"), rc);
226	}
227
228	return rc;
229	}
230
231	// ISession methods
232	/////////////////////////////////////////////////////////////////////////////
233
234	STDMETHODIMP Session::UnlockMachine()
235	{
236	LogFlowThisFunc(("mState=%d, mType=%d\n", mState, mType));
237
238	AutoCaller autoCaller(this);
239	if (FAILED(autoCaller.rc())) return autoCaller.rc();
240
241	/* close() needs write lock */
242	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
243
244	CHECK_OPEN();
245
246	return unlockMachine(false /* aFinalRelease /, false / aFromServer */);
247	}
248
249	// IInternalSessionControl methods
250	/////////////////////////////////////////////////////////////////////////////
251
252	STDMETHODIMP Session::GetPID(ULONG *aPid)
253	{
254	AssertReturn(aPid, E_POINTER);
255
256	AutoCaller autoCaller(this);
257	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
258
259	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
260
261	*aPid = (ULONG)RTProcSelf();
262	AssertCompile(sizeof(*aPid) == sizeof(RTPROCESS));
263
264	return S_OK;
265	}
266
267	STDMETHODIMP Session::GetRemoteConsole(IConsole **aConsole)
268	{
269	LogFlowThisFuncEnter();
270	AssertReturn(aConsole, E_POINTER);
271
272	AutoCaller autoCaller(this);
273	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
274
275	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
276
277	AssertReturn(mState != SessionState_Unlocked, VBOX_E_INVALID_VM_STATE);
278
279	AssertMsgReturn(mType == SessionType_WriteLock && !!mConsole,
280	("This is not a direct session!\n"),
281	VBOX_E_INVALID_OBJECT_STATE);
282
283	/* return a failure if the session already transitioned to Closing
284	* but the server hasn't processed Machine::OnSessionEnd() yet. */
285	if (mState != SessionState_Locked)
286	return VBOX_E_INVALID_VM_STATE;
287
288	mConsole.queryInterfaceTo(aConsole);
289
290	LogFlowThisFuncLeave();
291
292	return S_OK;
293	}
294
295	STDMETHODIMP Session::AssignMachine(IMachine *aMachine)
296	{
297	LogFlowThisFuncEnter();
298	LogFlowThisFunc(("aMachine=%p\n", aMachine));
299
300	AutoCaller autoCaller(this);
301	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
302
303	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
304
305	AssertReturn(mState == SessionState_Unlocked, VBOX_E_INVALID_VM_STATE);
306
307	if (!aMachine)
308	{
309	/*
310	* A special case: the server informs us that this session has been
311	* passed to IMachine::launchVMProcess() so this session will become
312	* remote (but not existing) when AssignRemoteMachine() is called.
313	*/
314
315	AssertReturn(mType == SessionType_Null, VBOX_E_INVALID_OBJECT_STATE);
316	mType = SessionType_Remote;
317	mState = SessionState_Spawning;
318
319	LogFlowThisFuncLeave();
320	return S_OK;
321	}
322
323	HRESULT rc = E_FAIL;
324
325	/* query IInternalMachineControl interface */
326	mControl = aMachine;
327	AssertReturn(!!mControl, E_FAIL);
328
329	rc = mConsole.createObject();
330	AssertComRCReturn(rc, rc);
331
332	rc = mConsole->init(aMachine, mControl);
333	AssertComRCReturn(rc, rc);
334
335	rc = grabIPCSemaphore();
336
337	/*
338	* Reference the VirtualBox object to ensure the server is up
339	* until the session is closed
340	*/
341	if (SUCCEEDED(rc))
342	rc = aMachine->COMGETTER(Parent)(mVirtualBox.asOutParam());
343
344	if (SUCCEEDED(rc))
345	{
346	mType = SessionType_WriteLock;
347	mState = SessionState_Locked;
348	}
349	else
350	{
351	/* some cleanup */
352	mControl.setNull();
353	mConsole->uninit();
354	mConsole.setNull();
355	}
356
357	LogFlowThisFunc(("rc=%08X\n", rc));
358	LogFlowThisFuncLeave();
359
360	return rc;
361	}
362
363	STDMETHODIMP Session::AssignRemoteMachine(IMachine aMachine, IConsole aConsole)
364	{
365	LogFlowThisFuncEnter();
366	LogFlowThisFunc(("aMachine=%p, aConsole=%p\n", aMachine, aConsole));
367
368	AssertReturn(aMachine && aConsole, E_INVALIDARG);
369
370	AutoCaller autoCaller(this);
371	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
372
373	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
374
375	AssertReturn(mState == SessionState_Unlocked \|\|
376	mState == SessionState_Spawning, VBOX_E_INVALID_VM_STATE);
377
378	HRESULT rc = E_FAIL;
379
380	/* query IInternalMachineControl interface */
381	mControl = aMachine;
382	AssertReturn(!!mControl, E_FAIL);
383
384	/// @todo (dmik)
385	// currently, the remote session returns the same machine and
386	// console objects as the direct session, thus giving the
387	// (remote) client full control over the direct session. For the
388	// console, it is the desired behavior (the ability to control
389	// VM execution is a must for the remote session). What about
390	// the machine object, we may want to prevent the remote client
391	// from modifying machine data. In this case, we must:
392	// 1) assign the Machine object (instead of the SessionMachine
393	// object that is passed to this method) to mRemoteMachine;
394	// 2) remove GetMachine() property from the IConsole interface
395	// because it always returns the SessionMachine object
396	// (alternatively, we can supply a separate IConsole
397	// implementation that will return the Machine object in
398	// response to GetMachine()).
399
400	mRemoteMachine = aMachine;
401	mRemoteConsole = aConsole;
402
403	/*
404	* Reference the VirtualBox object to ensure the server is up
405	* until the session is closed
406	*/
407	rc = aMachine->COMGETTER(Parent)(mVirtualBox.asOutParam());
408
409	if (SUCCEEDED(rc))
410	{
411	/*
412	* RemoteSession type can be already set by AssignMachine() when its
413	* argument is NULL (a special case)
414	*/
415	if (mType != SessionType_Remote)
416	mType = SessionType_Shared;
417	else
418	Assert(mState == SessionState_Spawning);
419
420	mState = SessionState_Locked;
421	}
422	else
423	{
424	/* some cleanup */
425	mControl.setNull();
426	mRemoteMachine.setNull();
427	mRemoteConsole.setNull();
428	}
429
430	LogFlowThisFunc(("rc=%08X\n", rc));
431	LogFlowThisFuncLeave();
432
433	return rc;
434	}
435
436	STDMETHODIMP Session::UpdateMachineState(MachineState_T aMachineState)
437	{
438	AutoCaller autoCaller(this);
439
440	if (autoCaller.state() != Ready)
441	{
442	/*
443	* We might have already entered Session::uninit() at this point, so
444	* return silently (not interested in the state change during uninit)
445	*/
446	LogFlowThisFunc(("Already uninitialized.\n"));
447	return S_OK;
448	}
449
450	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
451
452	if (mState == SessionState_Unlocking)
453	{
454	LogFlowThisFunc(("Already being unlocked.\n"));
455	return S_OK;
456	}
457
458	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
459	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
460
461	AssertReturn(!mControl.isNull(), E_FAIL);
462	AssertReturn(!mConsole.isNull(), E_FAIL);
463
464	return mConsole->updateMachineState(aMachineState);
465	}
466
467	STDMETHODIMP Session::Uninitialize()
468	{
469	LogFlowThisFuncEnter();
470
471	AutoCaller autoCaller(this);
472
473	HRESULT rc = S_OK;
474
475	if (autoCaller.state() == Ready)
476	{
477	/* close() needs write lock */
478	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
479
480	LogFlowThisFunc(("mState=%s, mType=%d\n", Global::stringifySessionState(mState), mType));
481
482	if (mState == SessionState_Unlocking)
483	{
484	LogFlowThisFunc(("Already being unlocked.\n"));
485	return S_OK;
486	}
487
488	AssertReturn(mState == SessionState_Locked \|\|
489	mState == SessionState_Spawning, VBOX_E_INVALID_VM_STATE);
490
491	/* close ourselves */
492	rc = unlockMachine(false /* aFinalRelease /, true / aFromServer */);
493	}
494	else if (autoCaller.state() == InUninit)
495	{
496	/*
497	* We might have already entered Session::uninit() at this point,
498	* return silently
499	*/
500	LogFlowThisFunc(("Already uninitialized.\n"));
501	}
502	else
503	{
504	LogWarningThisFunc(("UNEXPECTED uninitialization!\n"));
505	rc = autoCaller.rc();
506	}
507
508	LogFlowThisFunc(("rc=%08X\n", rc));
509	LogFlowThisFuncLeave();
510
511	return rc;
512	}
513
514	STDMETHODIMP Session::OnNetworkAdapterChange(INetworkAdapter *networkAdapter, BOOL changeAdapter)
515	{
516	LogFlowThisFunc(("\n"));
517
518	AutoCaller autoCaller(this);
519	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
520
521	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
522	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
523	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
524
525	return mConsole->onNetworkAdapterChange(networkAdapter, changeAdapter);
526	}
527
528	STDMETHODIMP Session::OnSerialPortChange(ISerialPort *serialPort)
529	{
530	LogFlowThisFunc(("\n"));
531
532	AutoCaller autoCaller(this);
533	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
534
535	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
536	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
537	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
538
539	return mConsole->onSerialPortChange(serialPort);
540	}
541
542	STDMETHODIMP Session::OnParallelPortChange(IParallelPort *parallelPort)
543	{
544	LogFlowThisFunc(("\n"));
545
546	AutoCaller autoCaller(this);
547	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
548
549	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
550	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
551	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
552
553	return mConsole->onParallelPortChange(parallelPort);
554	}
555
556	STDMETHODIMP Session::OnStorageControllerChange()
557	{
558	LogFlowThisFunc(("\n"));
559
560	AutoCaller autoCaller(this);
561	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
562
563	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
564	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
565	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
566
567	return mConsole->onStorageControllerChange();
568	}
569
570	STDMETHODIMP Session::OnMediumChange(IMediumAttachment *aMediumAttachment, BOOL aForce)
571	{
572	LogFlowThisFunc(("\n"));
573
574	AutoCaller autoCaller(this);
575	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
576
577	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
578	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
579	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
580
581	return mConsole->onMediumChange(aMediumAttachment, aForce);
582	}
583
584	STDMETHODIMP Session::OnCPUChange(ULONG aCPU, BOOL aRemove)
585	{
586	LogFlowThisFunc(("\n"));
587
588	AutoCaller autoCaller(this);
589	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
590
591	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
592	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
593	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
594
595	return mConsole->onCPUChange(aCPU, aRemove);
596	}
597
598	STDMETHODIMP Session::OnCPUPriorityChange(ULONG aCpuPriority)
599	{
600	LogFlowThisFunc(("\n"));
601
602	AutoCaller autoCaller(this);
603	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
604
605	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
606	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
607	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
608
609	return mConsole->onCPUPriorityChange(aCpuPriority);
610	}
611
612	STDMETHODIMP Session::OnVRDPServerChange(BOOL aRestart)
613	{
614	LogFlowThisFunc(("\n"));
615
616	AutoCaller autoCaller(this);
617	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
618
619	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
620	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
621	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
622
623	return mConsole->onVRDPServerChange(aRestart);
624	}
625
626	STDMETHODIMP Session::OnUSBControllerChange()
627	{
628	LogFlowThisFunc(("\n"));
629
630	AutoCaller autoCaller(this);
631	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
632
633	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
634	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
635	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
636
637	return mConsole->onUSBControllerChange();
638	}
639
640	STDMETHODIMP Session::OnSharedFolderChange(BOOL aGlobal)
641	{
642	LogFlowThisFunc(("\n"));
643
644	AutoCaller autoCaller(this);
645	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
646
647	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
648	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
649	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
650
651	return mConsole->onSharedFolderChange(aGlobal);
652	}
653
654	STDMETHODIMP Session::OnUSBDeviceAttach(IUSBDevice *aDevice,
655	IVirtualBoxErrorInfo *aError,
656	ULONG aMaskedIfs)
657	{
658	LogFlowThisFunc(("\n"));
659
660	AutoCaller autoCaller(this);
661	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
662
663	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
664	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
665	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
666
667	return mConsole->onUSBDeviceAttach(aDevice, aError, aMaskedIfs);
668	}
669
670	STDMETHODIMP Session::OnUSBDeviceDetach(IN_BSTR aId,
671	IVirtualBoxErrorInfo *aError)
672	{
673	LogFlowThisFunc(("\n"));
674
675	AutoCaller autoCaller(this);
676	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
677
678	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
679	AssertReturn(mState == SessionState_Locked, VBOX_E_INVALID_VM_STATE);
680	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
681
682	return mConsole->onUSBDeviceDetach(aId, aError);
683	}
684
685	STDMETHODIMP Session::OnShowWindow(BOOL aCheck, BOOL aCanShow, LONG64 aWinId)
686	{
687	AutoCaller autoCaller(this);
688	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
689
690	AutoReadLock alock(this COMMA_LOCKVAL_SRC_POS);
691
692	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
693
694	if (mState != SessionState_Locked)
695	{
696	/* the call from Machine issued when the session is open can arrive
697	* after the session starts closing or gets closed. Note that when
698	* aCheck is false, we return E_FAIL to indicate that aWinId we return
699	* is not valid */
700	*aCanShow = FALSE;
701	*aWinId = 0;
702	return aCheck ? S_OK : E_FAIL;
703	}
704
705	return mConsole->onShowWindow(aCheck, aCanShow, aWinId);
706	}
707
708	STDMETHODIMP Session::AccessGuestProperty(IN_BSTR aName, IN_BSTR aValue, IN_BSTR aFlags,
709	BOOL aIsSetter, BSTR aRetValue, LONG64 aRetTimestamp, BSTR *aRetFlags)
710	{
711	#ifdef VBOX_WITH_GUEST_PROPS
712	AutoCaller autoCaller(this);
713	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
714
715	if (mState != SessionState_Locked)
716	return setError(VBOX_E_INVALID_VM_STATE,
717	tr("Machine is not locked by session (session state: %s)."),
718	Global::stringifySessionState(mState));
719	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
720	CheckComArgStrNotEmptyOrNull(aName);
721	if (!aIsSetter && !VALID_PTR(aRetValue))
722	return E_POINTER;
723	if (!aIsSetter && !VALID_PTR(aRetTimestamp))
724	return E_POINTER;
725	if (!aIsSetter && !VALID_PTR(aRetFlags))
726	return E_POINTER;
727	/* aValue can be NULL for a setter call if the property is to be deleted. */
728	if (aIsSetter && (aValue != NULL) && !VALID_PTR(aValue))
729	return E_INVALIDARG;
730	/* aFlags can be null if it is to be left as is */
731	if (aIsSetter && (aFlags != NULL) && !VALID_PTR(aFlags))
732	return E_INVALIDARG;
733	if (!aIsSetter)
734	return mConsole->getGuestProperty(aName, aRetValue, aRetTimestamp, aRetFlags);
735	else
736	return mConsole->setGuestProperty(aName, aValue, aFlags);
737	#else /* VBOX_WITH_GUEST_PROPS not defined */
738	ReturnComNotImplemented();
739	#endif /* VBOX_WITH_GUEST_PROPS not defined */
740	}
741
742	STDMETHODIMP Session::EnumerateGuestProperties(IN_BSTR aPatterns,
743	ComSafeArrayOut(BSTR, aNames),
744	ComSafeArrayOut(BSTR, aValues),
745	ComSafeArrayOut(LONG64, aTimestamps),
746	ComSafeArrayOut(BSTR, aFlags))
747	{
748	#ifdef VBOX_WITH_GUEST_PROPS
749	AutoCaller autoCaller(this);
750	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
751
752	if (mState != SessionState_Locked)
753	return setError(VBOX_E_INVALID_VM_STATE,
754	tr("Machine is not locked by session (session state: %s)."),
755	Global::stringifySessionState(mState));
756	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
757	if (!VALID_PTR(aPatterns) && (aPatterns != NULL))
758	return E_POINTER;
759	if (ComSafeArrayOutIsNull(aNames))
760	return E_POINTER;
761	if (ComSafeArrayOutIsNull(aValues))
762	return E_POINTER;
763	if (ComSafeArrayOutIsNull(aTimestamps))
764	return E_POINTER;
765	if (ComSafeArrayOutIsNull(aFlags))
766	return E_POINTER;
767	return mConsole->enumerateGuestProperties(aPatterns,
768	ComSafeArrayOutArg(aNames),
769	ComSafeArrayOutArg(aValues),
770	ComSafeArrayOutArg(aTimestamps),
771	ComSafeArrayOutArg(aFlags));
772	#else /* VBOX_WITH_GUEST_PROPS not defined */
773	ReturnComNotImplemented();
774	#endif /* VBOX_WITH_GUEST_PROPS not defined */
775	}
776
777	STDMETHODIMP Session::OnlineMergeMedium(IMediumAttachment *aMediumAttachment,
778	ULONG aSourceIdx, ULONG aTargetIdx,
779	IMedium aSource, IMedium aTarget,
780	BOOL aMergeForward,
781	IMedium *aParentForTarget,
782	ComSafeArrayIn(IMedium *, aChildrenToReparent),
783	IProgress *aProgress)
784	{
785	AutoCaller autoCaller(this);
786	AssertComRCReturn(autoCaller.rc(), autoCaller.rc());
787
788	if (mState != SessionState_Locked)
789	return setError(VBOX_E_INVALID_VM_STATE,
790	tr("Machine is not locked by session (session state: %s)."),
791	Global::stringifySessionState(mState));
792	AssertReturn(mType == SessionType_WriteLock, VBOX_E_INVALID_OBJECT_STATE);
793	CheckComArgNotNull(aMediumAttachment);
794	CheckComArgSafeArrayNotNull(aChildrenToReparent);
795
796	return mConsole->onlineMergeMedium(aMediumAttachment, aSourceIdx,
797	aTargetIdx, aSource, aTarget,
798	aMergeForward, aParentForTarget,
799	ComSafeArrayInArg(aChildrenToReparent),
800	aProgress);
801	}
802
803
804	// private methods
805	///////////////////////////////////////////////////////////////////////////////
806
807	/**
808	* Unlocks a machine associated with the current session.
809	*
810	* @param aFinalRelease called as a result of FinalRelease()
811	* @param aFromServer called as a result of Uninitialize()
812	*
813	* @note To be called only from #uninit(), #UnlockMachine() or #Uninitialize().
814	* @note Locks this object for writing.
815	*/
816	HRESULT Session::unlockMachine(bool aFinalRelease, bool aFromServer)
817	{
818	LogFlowThisFuncEnter();
819	LogFlowThisFunc(("aFinalRelease=%d, isFromServer=%d\n",
820	aFinalRelease, aFromServer));
821
822	AutoCaller autoCaller(this);
823	AssertComRCReturnRC(autoCaller.rc());
824
825	AutoWriteLock alock(this COMMA_LOCKVAL_SRC_POS);
826
827	LogFlowThisFunc(("mState=%s, mType=%d\n", Global::stringifySessionState(mState), mType));
828
829	if (mState != SessionState_Locked)
830	{
831	Assert(mState == SessionState_Spawning);
832
833	/* The session object is going to be uninitialized before it has been
834	* assigned a direct console of the machine the client requested to open
835	* a remote session to using IVirtualBox:: openRemoteSession(). It is OK
836	* only if this close reqiest comes from the server (for example, it
837	* detected that the VM process it started terminated before opening a
838	* direct session). Otherwise, it means that the client is too fast and
839	* trying to close the session before waiting for the progress object it
840	* got from IVirtualBox:: openRemoteSession() to complete, so assert. */
841	Assert(aFromServer);
842
843	mState = SessionState_Unlocked;
844	mType = SessionType_Null;
845	#if defined(RT_OS_WINDOWS)
846	Assert(!mIPCSem && !mIPCThreadSem);
847	#elif defined(RT_OS_OS2)
848	Assert(mIPCThread == NIL_RTTHREAD &&
849	mIPCThreadSem == NIL_RTSEMEVENT);
850	#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
851	Assert(mIPCSem == -1);
852	#else
853	# error "Port me!"
854	#endif
855	LogFlowThisFuncLeave();
856	return S_OK;
857	}
858
859	/* go to the closing state */
860	mState = SessionState_Unlocking;
861
862	if (mType == SessionType_WriteLock)
863	{
864	mConsole->uninit();
865	mConsole.setNull();
866	}
867	else
868	{
869	mRemoteMachine.setNull();
870	mRemoteConsole.setNull();
871	}
872
873	ComPtr<IProgress> progress;
874
875	if (!aFinalRelease && !aFromServer)
876	{
877	/*
878	* We trigger OnSessionEnd() only when the session closes itself using
879	* Close(). Note that if isFinalRelease = TRUE here, this means that
880	* the client process has already initialized the termination procedure
881	* without issuing Close() and the IPC channel is no more operational --
882	* so we cannot call the server's method (it will definitely fail). The
883	* server will instead simply detect the abnormal client death (since
884	* OnSessionEnd() is not called) and reset the machine state to Aborted.
885	*/
886
887	/*
888	* while waiting for OnSessionEnd() to complete one of our methods
889	* can be called by the server (for example, Uninitialize(), if the
890	* direct session has initiated a closure just a bit before us) so
891	* we need to release the lock to avoid deadlocks. The state is already
892	* SessionState_Closing here, so it's safe.
893	*/
894	alock.leave();
895
896	LogFlowThisFunc(("Calling mControl->OnSessionEnd()...\n"));
897	HRESULT rc = mControl->OnSessionEnd(this, progress.asOutParam());
898	LogFlowThisFunc(("mControl->OnSessionEnd()=%08X\n", rc));
899
900	alock.enter();
901
902	/*
903	* If we get E_UNEXPECTED this means that the direct session has already
904	* been closed, we're just too late with our notification and nothing more
905	*
906	* bird: Seems E_ACCESSDENIED is what gets returned these days; see
907	* VirtualBoxBase::addCaller.
908	*/
909	if (mType != SessionType_WriteLock && (rc == E_UNEXPECTED \|\| rc == E_ACCESSDENIED))
910	rc = S_OK;
911
912	#ifndef DEBUG_bird /* I don't want clients crashing on me just because VBoxSVC went belly up. */
913	AssertComRC(rc);
914	#endif
915	}
916
917	mControl.setNull();
918
919	if (mType == SessionType_WriteLock)
920	{
921	releaseIPCSemaphore();
922	if (!aFinalRelease && !aFromServer)
923	{
924	/*
925	* Wait for the server to grab the semaphore and destroy the session
926	* machine (allowing us to open a new session with the same machine
927	* once this method returns)
928	*/
929	Assert(!!progress);
930	if (progress)
931	progress->WaitForCompletion(-1);
932	}
933	}
934
935	mState = SessionState_Unlocked;
936	mType = SessionType_Null;
937
938	/* release the VirtualBox instance as the very last step */
939	mVirtualBox.setNull();
940
941	LogFlowThisFuncLeave();
942	return S_OK;
943	}
944
945	/** @note To be called only from #AssignMachine() */
946	HRESULT Session::grabIPCSemaphore()
947	{
948	HRESULT rc = E_FAIL;
949
950	/* open the IPC semaphore based on the sessionId and try to grab it */
951	Bstr ipcId;
952	rc = mControl->GetIPCId(ipcId.asOutParam());
953	AssertComRCReturnRC(rc);
954
955	LogFlowThisFunc(("ipcId='%ls'\n", ipcId.raw()));
956
957	#if defined(RT_OS_WINDOWS)
958
959	/*
960	* Since Session is an MTA object, this method can be executed on
961	* any thread, and this thread will not necessarily match the thread on
962	* which close() will be called later. Therefore, we need a separate
963	* thread to hold the IPC mutex and then release it in close().
964	*/
965
966	mIPCThreadSem = ::CreateEvent(NULL, FALSE, FALSE, NULL);
967	AssertMsgReturn(mIPCThreadSem,
968	("Cannot create an event sem, err=%d", ::GetLastError()),
969	E_FAIL);
970
971	void *data[3];
972	data[0] = (void*)(BSTR)ipcId;
973	data[1] = (void*)mIPCThreadSem;
974	data[2] = 0; /* will get an output from the thread */
975
976	/* create a thread to hold the IPC mutex until signalled to release it */
977	RTTHREAD tid;
978	int vrc = RTThreadCreate(&tid, IPCMutexHolderThread, (void*)data, 0, RTTHREADTYPE_MAIN_WORKER, 0, "IPCHolder");
979	AssertRCReturn(vrc, E_FAIL);
980
981	/* wait until thread init is completed */
982	DWORD wrc = ::WaitForSingleObject(mIPCThreadSem, INFINITE);
983	AssertMsg(wrc == WAIT_OBJECT_0, ("Wait failed, err=%d\n", ::GetLastError()));
984	Assert(data[2]);
985
986	if (wrc == WAIT_OBJECT_0 && data[2])
987	{
988	/* memorize the event sem we should signal in close() */
989	mIPCSem = (HANDLE)data[2];
990	rc = S_OK;
991	}
992	else
993	{
994	::CloseHandle(mIPCThreadSem);
995	mIPCThreadSem = NULL;
996	rc = E_FAIL;
997	}
998
999	#elif defined(RT_OS_OS2)
1000
1001	/* We use XPCOM where any message (including close()) can arrive on any
1002	* worker thread (which will not necessarily match this thread that opens
1003	* the mutex). Therefore, we need a separate thread to hold the IPC mutex
1004	* and then release it in close(). */
1005
1006	int vrc = RTSemEventCreate(&mIPCThreadSem);
1007	AssertRCReturn(vrc, E_FAIL);
1008
1009	void *data[3];
1010	data[0] = (void*)ipcId.raw();
1011	data[1] = (void*)mIPCThreadSem;
1012	data[2] = (void)false; / will get the thread result here */
1013
1014	/* create a thread to hold the IPC mutex until signalled to release it */
1015	vrc = RTThreadCreate(&mIPCThread, IPCMutexHolderThread, (void *) data,
1016	0, RTTHREADTYPE_MAIN_WORKER, 0, "IPCHolder");
1017	AssertRCReturn(vrc, E_FAIL);
1018
1019	/* wait until thread init is completed */
1020	vrc = RTThreadUserWait (mIPCThread, RT_INDEFINITE_WAIT);
1021	AssertReturn(RT_SUCCESS(vrc) \|\| vrc == VERR_INTERRUPTED, E_FAIL);
1022
1023	/* the thread must succeed */
1024	AssertReturn((bool)data[2], E_FAIL);
1025
1026	#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
1027
1028	# ifdef VBOX_WITH_NEW_SYS_V_KEYGEN
1029	Utf8Str ipcKey = ipcId;
1030	key_t key = RTStrToUInt32(ipcKey.c_str());
1031	AssertMsgReturn (key != 0,
1032	("Key value of 0 is not valid for IPC semaphore"),
1033	E_FAIL);
1034	# else /* !VBOX_WITH_NEW_SYS_V_KEYGEN */
1035	Utf8Str semName = ipcId;
1036	char *pszSemName = NULL;
1037	RTStrUtf8ToCurrentCP (&pszSemName, semName);
1038	key_t key = ::ftok (pszSemName, 'V');
1039	RTStrFree (pszSemName);
1040	# endif /* !VBOX_WITH_NEW_SYS_V_KEYGEN */
1041
1042	mIPCSem = ::semget (key, 0, 0);
1043	AssertMsgReturn (mIPCSem >= 0,
1044	("Cannot open IPC semaphore, errno=%d", errno),
1045	E_FAIL);
1046
1047	/* grab the semaphore */
1048	::sembuf sop = { 0, -1, SEM_UNDO };
1049	int rv = ::semop (mIPCSem, &sop, 1);
1050	AssertMsgReturn (rv == 0,
1051	("Cannot grab IPC semaphore, errno=%d", errno),
1052	E_FAIL);
1053
1054	#else
1055	# error "Port me!"
1056	#endif
1057
1058	return rc;
1059	}
1060
1061	/** @note To be called only from #close() */
1062	void Session::releaseIPCSemaphore()
1063	{
1064	/* release the IPC semaphore */
1065	#if defined(RT_OS_WINDOWS)
1066
1067	if (mIPCSem && mIPCThreadSem)
1068	{
1069	/*
1070	* tell the thread holding the IPC mutex to release it;
1071	* it will close mIPCSem handle
1072	*/
1073	::SetEvent (mIPCSem);
1074	/* wait for the thread to finish */
1075	::WaitForSingleObject (mIPCThreadSem, INFINITE);
1076	::CloseHandle (mIPCThreadSem);
1077
1078	mIPCThreadSem = NULL;
1079	mIPCSem = NULL;
1080	}
1081
1082	#elif defined(RT_OS_OS2)
1083
1084	if (mIPCThread != NIL_RTTHREAD)
1085	{
1086	Assert (mIPCThreadSem != NIL_RTSEMEVENT);
1087
1088	/* tell the thread holding the IPC mutex to release it */
1089	int vrc = RTSemEventSignal (mIPCThreadSem);
1090	AssertRC(vrc == NO_ERROR);
1091
1092	/* wait for the thread to finish */
1093	vrc = RTThreadUserWait (mIPCThread, RT_INDEFINITE_WAIT);
1094	Assert (RT_SUCCESS(vrc) \|\| vrc == VERR_INTERRUPTED);
1095
1096	mIPCThread = NIL_RTTHREAD;
1097	}
1098
1099	if (mIPCThreadSem != NIL_RTSEMEVENT)
1100	{
1101	RTSemEventDestroy (mIPCThreadSem);
1102	mIPCThreadSem = NIL_RTSEMEVENT;
1103	}
1104
1105	#elif defined(VBOX_WITH_SYS_V_IPC_SESSION_WATCHER)
1106
1107	if (mIPCSem >= 0)
1108	{
1109	::sembuf sop = { 0, 1, SEM_UNDO };
1110	::semop (mIPCSem, &sop, 1);
1111
1112	mIPCSem = -1;
1113	}
1114
1115	#else
1116	# error "Port me!"
1117	#endif
1118	}
1119
1120	#if defined(RT_OS_WINDOWS)
1121	/** VM IPC mutex holder thread */
1122	DECLCALLBACK(int) IPCMutexHolderThread (RTTHREAD Thread, void *pvUser)
1123	{
1124	LogFlowFuncEnter();
1125
1126	Assert (pvUser);
1127	void data = (void ) pvUser;
1128
1129	BSTR sessionId = (BSTR)data[0];
1130	HANDLE initDoneSem = (HANDLE)data[1];
1131
1132	HANDLE ipcMutex = ::OpenMutex (MUTEX_ALL_ACCESS, FALSE, sessionId);
1133	AssertMsg (ipcMutex, ("cannot open IPC mutex, err=%d\n", ::GetLastError()));
1134
1135	if (ipcMutex)
1136	{
1137	/* grab the mutex */
1138	DWORD wrc = ::WaitForSingleObject (ipcMutex, 0);
1139	AssertMsg (wrc == WAIT_OBJECT_0, ("cannot grab IPC mutex, err=%d\n", wrc));
1140	if (wrc == WAIT_OBJECT_0)
1141	{
1142	HANDLE finishSem = ::CreateEvent (NULL, FALSE, FALSE, NULL);
1143	AssertMsg (finishSem, ("cannot create event sem, err=%d\n", ::GetLastError()));
1144	if (finishSem)
1145	{
1146	data[2] = (void*)finishSem;
1147	/* signal we're done with init */
1148	::SetEvent (initDoneSem);
1149	/* wait until we're signaled to release the IPC mutex */
1150	::WaitForSingleObject (finishSem, INFINITE);
1151	/* release the IPC mutex */
1152	LogFlow (("IPCMutexHolderThread(): releasing IPC mutex...\n"));
1153	BOOL success = ::ReleaseMutex (ipcMutex);
1154	AssertMsg (success, ("cannot release mutex, err=%d\n", ::GetLastError()));
1155	::CloseHandle (ipcMutex);
1156	::CloseHandle (finishSem);
1157	}
1158	}
1159	}
1160
1161	/* signal we're done */
1162	::SetEvent (initDoneSem);
1163
1164	LogFlowFuncLeave();
1165
1166	return 0;
1167	}
1168	#endif
1169
1170	#if defined(RT_OS_OS2)
1171	/** VM IPC mutex holder thread */
1172	DECLCALLBACK(int) IPCMutexHolderThread (RTTHREAD Thread, void *pvUser)
1173	{
1174	LogFlowFuncEnter();
1175
1176	Assert (pvUser);
1177	void data = (void ) pvUser;
1178
1179	Utf8Str ipcId = (BSTR)data[0];
1180	RTSEMEVENT finishSem = (RTSEMEVENT)data[1];
1181
1182	LogFlowFunc (("ipcId='%s', finishSem=%p\n", ipcId.raw(), finishSem));
1183
1184	HMTX ipcMutex = NULLHANDLE;
1185	APIRET arc = ::DosOpenMutexSem ((PSZ) ipcId.raw(), &ipcMutex);
1186	AssertMsg (arc == NO_ERROR, ("cannot open IPC mutex, arc=%ld\n", arc));
1187
1188	if (arc == NO_ERROR)
1189	{
1190	/* grab the mutex */
1191	LogFlowFunc (("grabbing IPC mutex...\n"));
1192	arc = ::DosRequestMutexSem (ipcMutex, SEM_IMMEDIATE_RETURN);
1193	AssertMsg (arc == NO_ERROR, ("cannot grab IPC mutex, arc=%ld\n", arc));
1194	if (arc == NO_ERROR)
1195	{
1196	/* store the answer */
1197	data[2] = (void*)true;
1198	/* signal we're done */
1199	int vrc = RTThreadUserSignal (Thread);
1200	AssertRC(vrc);
1201
1202	/* wait until we're signaled to release the IPC mutex */
1203	LogFlowFunc (("waiting for termination signal..\n"));
1204	vrc = RTSemEventWait (finishSem, RT_INDEFINITE_WAIT);
1205	Assert (arc == ERROR_INTERRUPT \|\| ERROR_TIMEOUT);
1206
1207	/* release the IPC mutex */
1208	LogFlowFunc (("releasing IPC mutex...\n"));
1209	arc = ::DosReleaseMutexSem (ipcMutex);
1210	AssertMsg (arc == NO_ERROR, ("cannot release mutex, arc=%ld\n", arc));
1211	}
1212
1213	::DosCloseMutexSem (ipcMutex);
1214	}
1215
1216	/* store the answer */
1217	data[1] = (void*)false;
1218	/* signal we're done */
1219	int vrc = RTThreadUserSignal (Thread);
1220	AssertRC(vrc);
1221
1222	LogFlowFuncLeave();
1223
1224	return 0;
1225	}
1226	#endif
1227	/* vi: set tabstop=4 shiftwidth=4 expandtab: */

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source: vbox/trunk/src/VBox/Main/SessionImpl.cpp@ 31907

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